drivers/scsi/lpfc/lpfc_els.c

   1 /*******************************************************************
   2  * This file is part of the Emulex Linux Device Driver for         *
   3  * Fibre Channel Host Bus Adapters.                                *
   4  * Copyright (C) 2017-2023 Broadcom. All Rights Reserved. The term *
   5  * “Broadcom” refers to Broadcom Inc. and/or its subsidiaries.     *
   6  * Copyright (C) 2004-2016 Emulex.  All rights reserved.           *
   7  * EMULEX and SLI are trademarks of Emulex.                        *
   8  * www.broadcom.com                                                *
   9  * Portions Copyright (C) 2004-2005 Christoph Hellwig              *
  10  *                                                                 *
  11  * This program is free software; you can redistribute it and/or   *
  12  * modify it under the terms of version 2 of the GNU General       *
  13  * Public License as published by the Free Software Foundation.    *
  14  * This program is distributed in the hope that it will be useful. *
  15  * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND          *
  16  * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,  *
  17  * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE      *
  18  * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
  19  * TO BE LEGALLY INVALID.  See the GNU General Public License for  *
  20  * more details, a copy of which can be found in the file COPYING  *
  21  * included with this package.                                     *
  22  *******************************************************************/
  23 /* See Fibre Channel protocol T11 FC-LS for details */
  24 #include <linux/blkdev.h>
  25 #include <linux/pci.h>
  26 #include <linux/slab.h>
  27 #include <linux/interrupt.h>
  28 #include <linux/delay.h>
  29
  30 #include <scsi/scsi.h>
  31 #include <scsi/scsi_device.h>
  32 #include <scsi/scsi_host.h>
  33 #include <scsi/scsi_transport_fc.h>
  34 #include <uapi/scsi/fc/fc_fs.h>
  35 #include <uapi/scsi/fc/fc_els.h>
  36
  37 #include "lpfc_hw4.h"
  38 #include "lpfc_hw.h"
  39 #include "lpfc_sli.h"
  40 #include "lpfc_sli4.h"
  41 #include "lpfc_nl.h"
  42 #include "lpfc_disc.h"
  43 #include "lpfc_scsi.h"
  44 #include "lpfc.h"
  45 #include "lpfc_logmsg.h"
  46 #include "lpfc_crtn.h"
  47 #include "lpfc_vport.h"
  48 #include "lpfc_debugfs.h"
  49
  50 static int lpfc_els_retry(struct lpfc_hba *, struct lpfc_iocbq *,
  51                           struct lpfc_iocbq *);
  52 static void lpfc_cmpl_fabric_iocb(struct lpfc_hba *, struct lpfc_iocbq *,
  53                         struct lpfc_iocbq *);
  54 static void lpfc_fabric_abort_vport(struct lpfc_vport *vport);
  55 static int lpfc_issue_els_fdisc(struct lpfc_vport *vport,
  56                                 struct lpfc_nodelist *ndlp, uint8_t retry);
  57 static int lpfc_issue_fabric_iocb(struct lpfc_hba *phba,
  58                                   struct lpfc_iocbq *iocb);
  59 static void lpfc_cmpl_els_edc(struct lpfc_hba *phba,
  60                               struct lpfc_iocbq *cmdiocb,
  61                               struct lpfc_iocbq *rspiocb);
  62 static void lpfc_cmpl_els_uvem(struct lpfc_hba *, struct lpfc_iocbq *,
  63                                struct lpfc_iocbq *);
  64
  65 static int lpfc_max_els_tries = 3;
  66
  67 static void lpfc_init_cs_ctl_bitmap(struct lpfc_vport *vport);
  68 static void lpfc_vmid_set_cs_ctl_range(struct lpfc_vport *vport, u32 min, u32 max);
  69 static void lpfc_vmid_put_cs_ctl(struct lpfc_vport *vport, u32 ctcl_vmid);
  70
  71 /**
  72  * lpfc_els_chk_latt - Check host link attention event for a vport
  73  * @vport: pointer to a host virtual N_Port data structure.
  74  *
  75  * This routine checks whether there is an outstanding host link
  76  * attention event during the discovery process with the @vport. It is done
  77  * by reading the HBA's Host Attention (HA) register. If there is any host
  78  * link attention events during this @vport's discovery process, the @vport
  79  * shall be marked as FC_ABORT_DISCOVERY, a host link attention clear shall
  80  * be issued if the link state is not already in host link cleared state,
  81  * and a return code shall indicate whether the host link attention event
  82  * had happened.
  83  *
  84  * Note that, if either the host link is in state LPFC_LINK_DOWN or @vport
  85  * state in LPFC_VPORT_READY, the request for checking host link attention
  86  * event will be ignored and a return code shall indicate no host link
  87  * attention event had happened.
  88  *
  89  * Return codes
  90  *   0 - no host link attention event happened
  91  *   1 - host link attention event happened
  92  **/
  93 int
  94 lpfc_els_chk_latt(struct lpfc_vport *vport)
  95 {
  96         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
  97         struct lpfc_hba  *phba = vport->phba;
  98         uint32_t ha_copy;
  99
 100         if (vport->port_state >= LPFC_VPORT_READY ||
 101             phba->link_state == LPFC_LINK_DOWN ||
 102             phba->sli_rev > LPFC_SLI_REV3)
 103                 return 0;
 104
 105         /* Read the HBA Host Attention Register */
 106         if (lpfc_readl(phba->HAregaddr, &ha_copy))
 107                 return 1;
 108
 109         if (!(ha_copy & HA_LATT))
 110                 return 0;
 111
 112         /* Pending Link Event during Discovery */
 113         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
 114                          "0237 Pending Link Event during "
 115                          "Discovery: State x%x\n",
 116                          phba->pport->port_state);
 117
 118         /* CLEAR_LA should re-enable link attention events and
 119          * we should then immediately take a LATT event. The
 120          * LATT processing should call lpfc_linkdown() which
 121          * will cleanup any left over in-progress discovery
 122          * events.
 123          */
 124         spin_lock_irq(shost->host_lock);
 125         vport->fc_flag |= FC_ABORT_DISCOVERY;
 126         spin_unlock_irq(shost->host_lock);
 127
 128         if (phba->link_state != LPFC_CLEAR_LA)
 129                 lpfc_issue_clear_la(phba, vport);
 130
 131         return 1;
 132 }
 133
 134 /**
 135  * lpfc_prep_els_iocb - Allocate and prepare a lpfc iocb data structure
 136  * @vport: pointer to a host virtual N_Port data structure.
 137  * @expect_rsp: flag indicating whether response is expected.
 138  * @cmd_size: size of the ELS command.
 139  * @retry: number of retries to the command when it fails.
 140  * @ndlp: pointer to a node-list data structure.
 141  * @did: destination identifier.
 142  * @elscmd: the ELS command code.
 143  *
 144  * This routine is used for allocating a lpfc-IOCB data structure from
 145  * the driver lpfc-IOCB free-list and prepare the IOCB with the parameters
 146  * passed into the routine for discovery state machine to issue an Extended
 147  * Link Service (ELS) commands. It is a generic lpfc-IOCB allocation
 148  * and preparation routine that is used by all the discovery state machine
 149  * routines and the ELS command-specific fields will be later set up by
 150  * the individual discovery machine routines after calling this routine
 151  * allocating and preparing a generic IOCB data structure. It fills in the
 152  * Buffer Descriptor Entries (BDEs), allocates buffers for both command
 153  * payload and response payload (if expected). The reference count on the
 154  * ndlp is incremented by 1 and the reference to the ndlp is put into
 155  * ndlp of the IOCB data structure for this IOCB to hold the ndlp
 156  * reference for the command's callback function to access later.
 157  *
 158  * Return code
 159  *   Pointer to the newly allocated/prepared els iocb data structure
 160  *   NULL - when els iocb data structure allocation/preparation failed
 161  **/
 162 struct lpfc_iocbq *
 163 lpfc_prep_els_iocb(struct lpfc_vport *vport, u8 expect_rsp,
 164                    u16 cmd_size, u8 retry,
 165                    struct lpfc_nodelist *ndlp, u32 did,
 166                    u32 elscmd)
 167 {
 168         struct lpfc_hba  *phba = vport->phba;
 169         struct lpfc_iocbq *elsiocb;
 170         struct lpfc_dmabuf *pcmd, *prsp, *pbuflist, *bmp;
 171         struct ulp_bde64_le *bpl;
 172         u32 timeout = 0;
 173
 174         if (!lpfc_is_link_up(phba))
 175                 return NULL;
 176
 177         /* Allocate buffer for  command iocb */
 178         elsiocb = lpfc_sli_get_iocbq(phba);
 179         if (!elsiocb)
 180                 return NULL;
 181
 182         /*
 183          * If this command is for fabric controller and HBA running
 184          * in FIP mode send FLOGI, FDISC and LOGO as FIP frames.
 185          */
 186         if ((did == Fabric_DID) &&
 187             (phba->hba_flag & HBA_FIP_SUPPORT) &&
 188             ((elscmd == ELS_CMD_FLOGI) ||
 189              (elscmd == ELS_CMD_FDISC) ||
 190              (elscmd == ELS_CMD_LOGO)))
 191                 switch (elscmd) {
 192                 case ELS_CMD_FLOGI:
 193                         elsiocb->cmd_flag |=
 194                                 ((LPFC_ELS_ID_FLOGI << LPFC_FIP_ELS_ID_SHIFT)
 195                                  & LPFC_FIP_ELS_ID_MASK);
 196                         break;
 197                 case ELS_CMD_FDISC:
 198                         elsiocb->cmd_flag |=
 199                                 ((LPFC_ELS_ID_FDISC << LPFC_FIP_ELS_ID_SHIFT)
 200                                  & LPFC_FIP_ELS_ID_MASK);
 201                         break;
 202                 case ELS_CMD_LOGO:
 203                         elsiocb->cmd_flag |=
 204                                 ((LPFC_ELS_ID_LOGO << LPFC_FIP_ELS_ID_SHIFT)
 205                                  & LPFC_FIP_ELS_ID_MASK);
 206                         break;
 207                 }
 208         else
 209                 elsiocb->cmd_flag &= ~LPFC_FIP_ELS_ID_MASK;
 210
 211         /* fill in BDEs for command */
 212         /* Allocate buffer for command payload */
 213         pcmd = kmalloc(sizeof(*pcmd), GFP_KERNEL);
 214         if (pcmd)
 215                 pcmd->virt = lpfc_mbuf_alloc(phba, MEM_PRI, &pcmd->phys);
 216         if (!pcmd || !pcmd->virt)
 217                 goto els_iocb_free_pcmb_exit;
 218
 219         INIT_LIST_HEAD(&pcmd->list);
 220
 221         /* Allocate buffer for response payload */
 222         if (expect_rsp) {
 223                 prsp = kmalloc(sizeof(*prsp), GFP_KERNEL);
 224                 if (prsp)
 225                         prsp->virt = lpfc_mbuf_alloc(phba, MEM_PRI,
 226                                                      &prsp->phys);
 227                 if (!prsp || !prsp->virt)
 228                         goto els_iocb_free_prsp_exit;
 229                 INIT_LIST_HEAD(&prsp->list);
 230         } else {
 231                 prsp = NULL;
 232         }
 233
 234         /* Allocate buffer for Buffer ptr list */
 235         pbuflist = kmalloc(sizeof(*pbuflist), GFP_KERNEL);
 236         if (pbuflist)
 237                 pbuflist->virt = lpfc_mbuf_alloc(phba, MEM_PRI,
 238                                                  &pbuflist->phys);
 239         if (!pbuflist || !pbuflist->virt)
 240                 goto els_iocb_free_pbuf_exit;
 241
 242         INIT_LIST_HEAD(&pbuflist->list);
 243
 244         if (expect_rsp) {
 245                 switch (elscmd) {
 246                 case ELS_CMD_FLOGI:
 247                         timeout = FF_DEF_RATOV * 2;
 248                         break;
 249                 case ELS_CMD_LOGO:
 250                         timeout = phba->fc_ratov;
 251                         break;
 252                 default:
 253                         timeout = phba->fc_ratov * 2;
 254                 }
 255
 256                 /* Fill SGE for the num bde count */
 257                 elsiocb->num_bdes = 2;
 258         }
 259
 260         if (phba->sli_rev == LPFC_SLI_REV4)
 261                 bmp = pcmd;
 262         else
 263                 bmp = pbuflist;
 264
 265         lpfc_sli_prep_els_req_rsp(phba, elsiocb, vport, bmp, cmd_size, did,
 266                                   elscmd, timeout, expect_rsp);
 267
 268         bpl = (struct ulp_bde64_le *)pbuflist->virt;
 269         bpl->addr_low = cpu_to_le32(putPaddrLow(pcmd->phys));
 270         bpl->addr_high = cpu_to_le32(putPaddrHigh(pcmd->phys));
 271         bpl->type_size = cpu_to_le32(cmd_size);
 272         bpl->type_size |= cpu_to_le32(ULP_BDE64_TYPE_BDE_64);
 273
 274         if (expect_rsp) {
 275                 bpl++;
 276                 bpl->addr_low = cpu_to_le32(putPaddrLow(prsp->phys));
 277                 bpl->addr_high = cpu_to_le32(putPaddrHigh(prsp->phys));
 278                 bpl->type_size = cpu_to_le32(FCELSSIZE);
 279                 bpl->type_size |= cpu_to_le32(ULP_BDE64_TYPE_BDE_64);
 280         }
 281
 282         elsiocb->cmd_dmabuf = pcmd;
 283         elsiocb->bpl_dmabuf = pbuflist;
 284         elsiocb->retry = retry;
 285         elsiocb->vport = vport;
 286         elsiocb->drvrTimeout = (phba->fc_ratov << 1) + LPFC_DRVR_TIMEOUT;
 287
 288         if (prsp)
 289                 list_add(&prsp->list, &pcmd->list);
 290         if (expect_rsp) {
 291                 /* Xmit ELS command <elsCmd> to remote NPORT <did> */
 292                 lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
 293                                  "0116 Xmit ELS command x%x to remote "
 294                                  "NPORT x%x I/O tag: x%x, port state:x%x "
 295                                  "rpi x%x fc_flag:x%x\n",
 296                                  elscmd, did, elsiocb->iotag,
 297                                  vport->port_state, ndlp->nlp_rpi,
 298                                  vport->fc_flag);
 299         } else {
 300                 /* Xmit ELS response <elsCmd> to remote NPORT <did> */
 301                 lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
 302                                  "0117 Xmit ELS response x%x to remote "
 303                                  "NPORT x%x I/O tag: x%x, size: x%x "
 304                                  "port_state x%x  rpi x%x fc_flag x%x\n",
 305                                  elscmd, ndlp->nlp_DID, elsiocb->iotag,
 306                                  cmd_size, vport->port_state,
 307                                  ndlp->nlp_rpi, vport->fc_flag);
 308         }
 309
 310         return elsiocb;
 311
 312 els_iocb_free_pbuf_exit:
 313         if (expect_rsp)
 314                 lpfc_mbuf_free(phba, prsp->virt, prsp->phys);
 315         kfree(pbuflist);
 316
 317 els_iocb_free_prsp_exit:
 318         lpfc_mbuf_free(phba, pcmd->virt, pcmd->phys);
 319         kfree(prsp);
 320
 321 els_iocb_free_pcmb_exit:
 322         kfree(pcmd);
 323         lpfc_sli_release_iocbq(phba, elsiocb);
 324         return NULL;
 325 }
 326
 327 /**
 328  * lpfc_issue_fabric_reglogin - Issue fabric registration login for a vport
 329  * @vport: pointer to a host virtual N_Port data structure.
 330  *
 331  * This routine issues a fabric registration login for a @vport. An
 332  * active ndlp node with Fabric_DID must already exist for this @vport.
 333  * The routine invokes two mailbox commands to carry out fabric registration
 334  * login through the HBA firmware: the first mailbox command requests the
 335  * HBA to perform link configuration for the @vport; and the second mailbox
 336  * command requests the HBA to perform the actual fabric registration login
 337  * with the @vport.
 338  *
 339  * Return code
 340  *   0 - successfully issued fabric registration login for @vport
 341  *   -ENXIO -- failed to issue fabric registration login for @vport
 342  **/
 343 int
 344 lpfc_issue_fabric_reglogin(struct lpfc_vport *vport)
 345 {
 346         struct lpfc_hba  *phba = vport->phba;
 347         LPFC_MBOXQ_t *mbox;
 348         struct lpfc_nodelist *ndlp;
 349         struct serv_parm *sp;
 350         int rc;
 351         int err = 0;
 352
 353         sp = &phba->fc_fabparam;
 354         ndlp = lpfc_findnode_did(vport, Fabric_DID);
 355         if (!ndlp) {
 356                 err = 1;
 357                 goto fail;
 358         }
 359
 360         mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
 361         if (!mbox) {
 362                 err = 2;
 363                 goto fail;
 364         }
 365
 366         vport->port_state = LPFC_FABRIC_CFG_LINK;
 367         lpfc_config_link(phba, mbox);
 368         mbox->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
 369         mbox->vport = vport;
 370
 371         rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
 372         if (rc == MBX_NOT_FINISHED) {
 373                 err = 3;
 374                 goto fail_free_mbox;
 375         }
 376
 377         mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
 378         if (!mbox) {
 379                 err = 4;
 380                 goto fail;
 381         }
 382         rc = lpfc_reg_rpi(phba, vport->vpi, Fabric_DID, (uint8_t *)sp, mbox,
 383                           ndlp->nlp_rpi);
 384         if (rc) {
 385                 err = 5;
 386                 goto fail_free_mbox;
 387         }
 388
 389         mbox->mbox_cmpl = lpfc_mbx_cmpl_fabric_reg_login;
 390         mbox->vport = vport;
 391         /* increment the reference count on ndlp to hold reference
 392          * for the callback routine.
 393          */
 394         mbox->ctx_ndlp = lpfc_nlp_get(ndlp);
 395         if (!mbox->ctx_ndlp) {
 396                 err = 6;
 397                 goto fail_free_mbox;
 398         }
 399
 400         rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
 401         if (rc == MBX_NOT_FINISHED) {
 402                 err = 7;
 403                 goto fail_issue_reg_login;
 404         }
 405
 406         return 0;
 407
 408 fail_issue_reg_login:
 409         /* decrement the reference count on ndlp just incremented
 410          * for the failed mbox command.
 411          */
 412         lpfc_nlp_put(ndlp);
 413 fail_free_mbox:
 414         lpfc_mbox_rsrc_cleanup(phba, mbox, MBOX_THD_UNLOCKED);
 415 fail:
 416         lpfc_vport_set_state(vport, FC_VPORT_FAILED);
 417         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
 418                          "0249 Cannot issue Register Fabric login: Err %d\n",
 419                          err);
 420         return -ENXIO;
 421 }
 422
 423 /**
 424  * lpfc_issue_reg_vfi - Register VFI for this vport's fabric login
 425  * @vport: pointer to a host virtual N_Port data structure.
 426  *
 427  * This routine issues a REG_VFI mailbox for the vfi, vpi, fcfi triplet for
 428  * the @vport. This mailbox command is necessary for SLI4 port only.
 429  *
 430  * Return code
 431  *   0 - successfully issued REG_VFI for @vport
 432  *   A failure code otherwise.
 433  **/
 434 int
 435 lpfc_issue_reg_vfi(struct lpfc_vport *vport)
 436 {
 437         struct lpfc_hba  *phba = vport->phba;
 438         LPFC_MBOXQ_t *mboxq = NULL;
 439         struct lpfc_nodelist *ndlp;
 440         struct lpfc_dmabuf *dmabuf = NULL;
 441         int rc = 0;
 442
 443         /* move forward in case of SLI4 FC port loopback test and pt2pt mode */
 444         if ((phba->sli_rev == LPFC_SLI_REV4) &&
 445             !(phba->link_flag & LS_LOOPBACK_MODE) &&
 446             !(vport->fc_flag & FC_PT2PT)) {
 447                 ndlp = lpfc_findnode_did(vport, Fabric_DID);
 448                 if (!ndlp) {
 449                         rc = -ENODEV;
 450                         goto fail;
 451                 }
 452         }
 453
 454         mboxq = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
 455         if (!mboxq) {
 456                 rc = -ENOMEM;
 457                 goto fail;
 458         }
 459
 460         /* Supply CSP's only if we are fabric connect or pt-to-pt connect */
 461         if ((vport->fc_flag & FC_FABRIC) || (vport->fc_flag & FC_PT2PT)) {
 462                 rc = lpfc_mbox_rsrc_prep(phba, mboxq);
 463                 if (rc) {
 464                         rc = -ENOMEM;
 465                         goto fail_mbox;
 466                 }
 467                 dmabuf = mboxq->ctx_buf;
 468                 memcpy(dmabuf->virt, &phba->fc_fabparam,
 469                        sizeof(struct serv_parm));
 470         }
 471
 472         vport->port_state = LPFC_FABRIC_CFG_LINK;
 473         if (dmabuf) {
 474                 lpfc_reg_vfi(mboxq, vport, dmabuf->phys);
 475                 /* lpfc_reg_vfi memsets the mailbox.  Restore the ctx_buf. */
 476                 mboxq->ctx_buf = dmabuf;
 477         } else {
 478                 lpfc_reg_vfi(mboxq, vport, 0);
 479         }
 480
 481         mboxq->mbox_cmpl = lpfc_mbx_cmpl_reg_vfi;
 482         mboxq->vport = vport;
 483         rc = lpfc_sli_issue_mbox(phba, mboxq, MBX_NOWAIT);
 484         if (rc == MBX_NOT_FINISHED) {
 485                 rc = -ENXIO;
 486                 goto fail_mbox;
 487         }
 488         return 0;
 489
 490 fail_mbox:
 491         lpfc_mbox_rsrc_cleanup(phba, mboxq, MBOX_THD_UNLOCKED);
 492 fail:
 493         lpfc_vport_set_state(vport, FC_VPORT_FAILED);
 494         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
 495                          "0289 Issue Register VFI failed: Err %d\n", rc);
 496         return rc;
 497 }
 498
 499 /**
 500  * lpfc_issue_unreg_vfi - Unregister VFI for this vport's fabric login
 501  * @vport: pointer to a host virtual N_Port data structure.
 502  *
 503  * This routine issues a UNREG_VFI mailbox with the vfi, vpi, fcfi triplet for
 504  * the @vport. This mailbox command is necessary for SLI4 port only.
 505  *
 506  * Return code
 507  *   0 - successfully issued REG_VFI for @vport
 508  *   A failure code otherwise.
 509  **/
 510 int
 511 lpfc_issue_unreg_vfi(struct lpfc_vport *vport)
 512 {
 513         struct lpfc_hba *phba = vport->phba;
 514         struct Scsi_Host *shost;
 515         LPFC_MBOXQ_t *mboxq;
 516         int rc;
 517
 518         mboxq = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
 519         if (!mboxq) {
 520                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
 521                                 "2556 UNREG_VFI mbox allocation failed"
 522                                 "HBA state x%x\n", phba->pport->port_state);
 523                 return -ENOMEM;
 524         }
 525
 526         lpfc_unreg_vfi(mboxq, vport);
 527         mboxq->vport = vport;
 528         mboxq->mbox_cmpl = lpfc_unregister_vfi_cmpl;
 529
 530         rc = lpfc_sli_issue_mbox(phba, mboxq, MBX_NOWAIT);
 531         if (rc == MBX_NOT_FINISHED) {
 532                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
 533                                 "2557 UNREG_VFI issue mbox failed rc x%x "
 534                                 "HBA state x%x\n",
 535                                 rc, phba->pport->port_state);
 536                 mempool_free(mboxq, phba->mbox_mem_pool);
 537                 return -EIO;
 538         }
 539
 540         shost = lpfc_shost_from_vport(vport);
 541         spin_lock_irq(shost->host_lock);
 542         vport->fc_flag &= ~FC_VFI_REGISTERED;
 543         spin_unlock_irq(shost->host_lock);
 544         return 0;
 545 }
 546
 547 /**
 548  * lpfc_check_clean_addr_bit - Check whether assigned FCID is clean.
 549  * @vport: pointer to a host virtual N_Port data structure.
 550  * @sp: pointer to service parameter data structure.
 551  *
 552  * This routine is called from FLOGI/FDISC completion handler functions.
 553  * lpfc_check_clean_addr_bit return 1 when FCID/Fabric portname/ Fabric
 554  * node nodename is changed in the completion service parameter else return
 555  * 0. This function also set flag in the vport data structure to delay
 556  * NP_Port discovery after the FLOGI/FDISC completion if Clean address bit
 557  * in FLOGI/FDISC response is cleared and FCID/Fabric portname/ Fabric
 558  * node nodename is changed in the completion service parameter.
 559  *
 560  * Return code
 561  *   0 - FCID and Fabric Nodename and Fabric portname is not changed.
 562  *   1 - FCID or Fabric Nodename or Fabric portname is changed.
 563  *
 564  **/
 565 static uint8_t
 566 lpfc_check_clean_addr_bit(struct lpfc_vport *vport,
 567                 struct serv_parm *sp)
 568 {
 569         struct lpfc_hba *phba = vport->phba;
 570         uint8_t fabric_param_changed = 0;
 571         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
 572
 573         if ((vport->fc_prevDID != vport->fc_myDID) ||
 574                 memcmp(&vport->fabric_portname, &sp->portName,
 575                         sizeof(struct lpfc_name)) ||
 576                 memcmp(&vport->fabric_nodename, &sp->nodeName,
 577                         sizeof(struct lpfc_name)) ||
 578                 (vport->vport_flag & FAWWPN_PARAM_CHG)) {
 579                 fabric_param_changed = 1;
 580                 vport->vport_flag &= ~FAWWPN_PARAM_CHG;
 581         }
 582         /*
 583          * Word 1 Bit 31 in common service parameter is overloaded.
 584          * Word 1 Bit 31 in FLOGI request is multiple NPort request
 585          * Word 1 Bit 31 in FLOGI response is clean address bit
 586          *
 587          * If fabric parameter is changed and clean address bit is
 588          * cleared delay nport discovery if
 589          * - vport->fc_prevDID != 0 (not initial discovery) OR
 590          * - lpfc_delay_discovery module parameter is set.
 591          */
 592         if (fabric_param_changed && !sp->cmn.clean_address_bit &&
 593             (vport->fc_prevDID || phba->cfg_delay_discovery)) {
 594                 spin_lock_irq(shost->host_lock);
 595                 vport->fc_flag |= FC_DISC_DELAYED;
 596                 spin_unlock_irq(shost->host_lock);
 597         }
 598
 599         return fabric_param_changed;
 600 }
 601
 602
 603 /**
 604  * lpfc_cmpl_els_flogi_fabric - Completion function for flogi to a fabric port
 605  * @vport: pointer to a host virtual N_Port data structure.
 606  * @ndlp: pointer to a node-list data structure.
 607  * @sp: pointer to service parameter data structure.
 608  * @ulp_word4: command response value
 609  *
 610  * This routine is invoked by the lpfc_cmpl_els_flogi() completion callback
 611  * function to handle the completion of a Fabric Login (FLOGI) into a fabric
 612  * port in a fabric topology. It properly sets up the parameters to the @ndlp
 613  * from the IOCB response. It also check the newly assigned N_Port ID to the
 614  * @vport against the previously assigned N_Port ID. If it is different from
 615  * the previously assigned Destination ID (DID), the lpfc_unreg_rpi() routine
 616  * is invoked on all the remaining nodes with the @vport to unregister the
 617  * Remote Port Indicators (RPIs). Finally, the lpfc_issue_fabric_reglogin()
 618  * is invoked to register login to the fabric.
 619  *
 620  * Return code
 621  *   0 - Success (currently, always return 0)
 622  **/
 623 static int
 624 lpfc_cmpl_els_flogi_fabric(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 625                            struct serv_parm *sp, uint32_t ulp_word4)
 626 {
 627         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
 628         struct lpfc_hba  *phba = vport->phba;
 629         struct lpfc_nodelist *np;
 630         struct lpfc_nodelist *next_np;
 631         uint8_t fabric_param_changed;
 632
 633         spin_lock_irq(shost->host_lock);
 634         vport->fc_flag |= FC_FABRIC;
 635         spin_unlock_irq(shost->host_lock);
 636
 637         phba->fc_edtov = be32_to_cpu(sp->cmn.e_d_tov);
 638         if (sp->cmn.edtovResolution)    /* E_D_TOV ticks are in nanoseconds */
 639                 phba->fc_edtov = (phba->fc_edtov + 999999) / 1000000;
 640
 641         phba->fc_edtovResol = sp->cmn.edtovResolution;
 642         phba->fc_ratov = (be32_to_cpu(sp->cmn.w2.r_a_tov) + 999) / 1000;
 643
 644         if (phba->fc_topology == LPFC_TOPOLOGY_LOOP) {
 645                 spin_lock_irq(shost->host_lock);
 646                 vport->fc_flag |= FC_PUBLIC_LOOP;
 647                 spin_unlock_irq(shost->host_lock);
 648         }
 649
 650         vport->fc_myDID = ulp_word4 & Mask_DID;
 651         memcpy(&ndlp->nlp_portname, &sp->portName, sizeof(struct lpfc_name));
 652         memcpy(&ndlp->nlp_nodename, &sp->nodeName, sizeof(struct lpfc_name));
 653         ndlp->nlp_class_sup = 0;
 654         if (sp->cls1.classValid)
 655                 ndlp->nlp_class_sup |= FC_COS_CLASS1;
 656         if (sp->cls2.classValid)
 657                 ndlp->nlp_class_sup |= FC_COS_CLASS2;
 658         if (sp->cls3.classValid)
 659                 ndlp->nlp_class_sup |= FC_COS_CLASS3;
 660         if (sp->cls4.classValid)
 661                 ndlp->nlp_class_sup |= FC_COS_CLASS4;
 662         ndlp->nlp_maxframe = ((sp->cmn.bbRcvSizeMsb & 0x0F) << 8) |
 663                                 sp->cmn.bbRcvSizeLsb;
 664
 665         fabric_param_changed = lpfc_check_clean_addr_bit(vport, sp);
 666         if (fabric_param_changed) {
 667                 /* Reset FDMI attribute masks based on config parameter */
 668                 if (phba->cfg_enable_SmartSAN ||
 669                     (phba->cfg_fdmi_on == LPFC_FDMI_SUPPORT)) {
 670                         /* Setup appropriate attribute masks */
 671                         vport->fdmi_hba_mask = LPFC_FDMI2_HBA_ATTR;
 672                         if (phba->cfg_enable_SmartSAN)
 673                                 vport->fdmi_port_mask = LPFC_FDMI2_SMART_ATTR;
 674                         else
 675                                 vport->fdmi_port_mask = LPFC_FDMI2_PORT_ATTR;
 676                 } else {
 677                         vport->fdmi_hba_mask = 0;
 678                         vport->fdmi_port_mask = 0;
 679                 }
 680
 681         }
 682         memcpy(&vport->fabric_portname, &sp->portName,
 683                         sizeof(struct lpfc_name));
 684         memcpy(&vport->fabric_nodename, &sp->nodeName,
 685                         sizeof(struct lpfc_name));
 686         memcpy(&phba->fc_fabparam, sp, sizeof(struct serv_parm));
 687
 688         if (phba->sli3_options & LPFC_SLI3_NPIV_ENABLED) {
 689                 if (sp->cmn.response_multiple_NPort) {
 690                         lpfc_printf_vlog(vport, KERN_WARNING,
 691                                          LOG_ELS | LOG_VPORT,
 692                                          "1816 FLOGI NPIV supported, "
 693                                          "response data 0x%x\n",
 694                                          sp->cmn.response_multiple_NPort);
 695                         spin_lock_irq(&phba->hbalock);
 696                         phba->link_flag |= LS_NPIV_FAB_SUPPORTED;
 697                         spin_unlock_irq(&phba->hbalock);
 698                 } else {
 699                         /* Because we asked f/w for NPIV it still expects us
 700                         to call reg_vnpid at least for the physical host */
 701                         lpfc_printf_vlog(vport, KERN_WARNING,
 702                                          LOG_ELS | LOG_VPORT,
 703                                          "1817 Fabric does not support NPIV "
 704                                          "- configuring single port mode.\n");
 705                         spin_lock_irq(&phba->hbalock);
 706                         phba->link_flag &= ~LS_NPIV_FAB_SUPPORTED;
 707                         spin_unlock_irq(&phba->hbalock);
 708                 }
 709         }
 710
 711         /*
 712          * For FC we need to do some special processing because of the SLI
 713          * Port's default settings of the Common Service Parameters.
 714          */
 715         if ((phba->sli_rev == LPFC_SLI_REV4) &&
 716             (phba->sli4_hba.lnk_info.lnk_tp == LPFC_LNK_TYPE_FC)) {
 717                 /* If physical FC port changed, unreg VFI and ALL VPIs / RPIs */
 718                 if (fabric_param_changed)
 719                         lpfc_unregister_fcf_prep(phba);
 720
 721                 /* This should just update the VFI CSPs*/
 722                 if (vport->fc_flag & FC_VFI_REGISTERED)
 723                         lpfc_issue_reg_vfi(vport);
 724         }
 725
 726         if (fabric_param_changed &&
 727                 !(vport->fc_flag & FC_VPORT_NEEDS_REG_VPI)) {
 728
 729                 /* If our NportID changed, we need to ensure all
 730                  * remaining NPORTs get unreg_login'ed.
 731                  */
 732                 list_for_each_entry_safe(np, next_np,
 733                                         &vport->fc_nodes, nlp_listp) {
 734                         if ((np->nlp_state != NLP_STE_NPR_NODE) ||
 735                                    !(np->nlp_flag & NLP_NPR_ADISC))
 736                                 continue;
 737                         spin_lock_irq(&np->lock);
 738                         np->nlp_flag &= ~NLP_NPR_ADISC;
 739                         spin_unlock_irq(&np->lock);
 740                         lpfc_unreg_rpi(vport, np);
 741                 }
 742                 lpfc_cleanup_pending_mbox(vport);
 743
 744                 if (phba->sli_rev == LPFC_SLI_REV4) {
 745                         lpfc_sli4_unreg_all_rpis(vport);
 746                         lpfc_mbx_unreg_vpi(vport);
 747                         spin_lock_irq(shost->host_lock);
 748                         vport->fc_flag |= FC_VPORT_NEEDS_INIT_VPI;
 749                         spin_unlock_irq(shost->host_lock);
 750                 }
 751
 752                 /*
 753                  * For SLI3 and SLI4, the VPI needs to be reregistered in
 754                  * response to this fabric parameter change event.
 755                  */
 756                 spin_lock_irq(shost->host_lock);
 757                 vport->fc_flag |= FC_VPORT_NEEDS_REG_VPI;
 758                 spin_unlock_irq(shost->host_lock);
 759         } else if ((phba->sli_rev == LPFC_SLI_REV4) &&
 760                 !(vport->fc_flag & FC_VPORT_NEEDS_REG_VPI)) {
 761                         /*
 762                          * Driver needs to re-reg VPI in order for f/w
 763                          * to update the MAC address.
 764                          */
 765                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
 766                         lpfc_register_new_vport(phba, vport, ndlp);
 767                         return 0;
 768         }
 769
 770         if (phba->sli_rev < LPFC_SLI_REV4) {
 771                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_REG_LOGIN_ISSUE);
 772                 if (phba->sli3_options & LPFC_SLI3_NPIV_ENABLED &&
 773                     vport->fc_flag & FC_VPORT_NEEDS_REG_VPI)
 774                         lpfc_register_new_vport(phba, vport, ndlp);
 775                 else
 776                         lpfc_issue_fabric_reglogin(vport);
 777         } else {
 778                 ndlp->nlp_type |= NLP_FABRIC;
 779                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
 780                 if ((!(vport->fc_flag & FC_VPORT_NEEDS_REG_VPI)) &&
 781                         (vport->vpi_state & LPFC_VPI_REGISTERED)) {
 782                         lpfc_start_fdiscs(phba);
 783                         lpfc_do_scr_ns_plogi(phba, vport);
 784                 } else if (vport->fc_flag & FC_VFI_REGISTERED)
 785                         lpfc_issue_init_vpi(vport);
 786                 else {
 787                         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
 788                                         "3135 Need register VFI: (x%x/%x)\n",
 789                                         vport->fc_prevDID, vport->fc_myDID);
 790                         lpfc_issue_reg_vfi(vport);
 791                 }
 792         }
 793         return 0;
 794 }
 795
 796 /**
 797  * lpfc_cmpl_els_flogi_nport - Completion function for flogi to an N_Port
 798  * @vport: pointer to a host virtual N_Port data structure.
 799  * @ndlp: pointer to a node-list data structure.
 800  * @sp: pointer to service parameter data structure.
 801  *
 802  * This routine is invoked by the lpfc_cmpl_els_flogi() completion callback
 803  * function to handle the completion of a Fabric Login (FLOGI) into an N_Port
 804  * in a point-to-point topology. First, the @vport's N_Port Name is compared
 805  * with the received N_Port Name: if the @vport's N_Port Name is greater than
 806  * the received N_Port Name lexicographically, this node shall assign local
 807  * N_Port ID (PT2PT_LocalID: 1) and remote N_Port ID (PT2PT_RemoteID: 2) and
 808  * will send out Port Login (PLOGI) with the N_Port IDs assigned. Otherwise,
 809  * this node shall just wait for the remote node to issue PLOGI and assign
 810  * N_Port IDs.
 811  *
 812  * Return code
 813  *   0 - Success
 814  *   -ENXIO - Fail
 815  **/
 816 static int
 817 lpfc_cmpl_els_flogi_nport(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 818                           struct serv_parm *sp)
 819 {
 820         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
 821         struct lpfc_hba  *phba = vport->phba;
 822         LPFC_MBOXQ_t *mbox;
 823         int rc;
 824
 825         spin_lock_irq(shost->host_lock);
 826         vport->fc_flag &= ~(FC_FABRIC | FC_PUBLIC_LOOP);
 827         vport->fc_flag |= FC_PT2PT;
 828         spin_unlock_irq(shost->host_lock);
 829
 830         /* If we are pt2pt with another NPort, force NPIV off! */
 831         phba->sli3_options &= ~LPFC_SLI3_NPIV_ENABLED;
 832
 833         /* If physical FC port changed, unreg VFI and ALL VPIs / RPIs */
 834         if ((phba->sli_rev == LPFC_SLI_REV4) && phba->fc_topology_changed) {
 835                 lpfc_unregister_fcf_prep(phba);
 836
 837                 spin_lock_irq(shost->host_lock);
 838                 vport->fc_flag &= ~FC_VFI_REGISTERED;
 839                 spin_unlock_irq(shost->host_lock);
 840                 phba->fc_topology_changed = 0;
 841         }
 842
 843         rc = memcmp(&vport->fc_portname, &sp->portName,
 844                     sizeof(vport->fc_portname));
 845
 846         if (rc >= 0) {
 847                 /* This side will initiate the PLOGI */
 848                 spin_lock_irq(shost->host_lock);
 849                 vport->fc_flag |= FC_PT2PT_PLOGI;
 850                 spin_unlock_irq(shost->host_lock);
 851
 852                 /*
 853                  * N_Port ID cannot be 0, set our Id to LocalID
 854                  * the other side will be RemoteID.
 855                  */
 856
 857                 /* not equal */
 858                 if (rc)
 859                         vport->fc_myDID = PT2PT_LocalID;
 860
 861                 /* If not registered with a transport, decrement ndlp reference
 862                  * count indicating that ndlp can be safely released when other
 863                  * references are removed.
 864                  */
 865                 if (!(ndlp->fc4_xpt_flags & (SCSI_XPT_REGD | NVME_XPT_REGD)))
 866                         lpfc_nlp_put(ndlp);
 867
 868                 ndlp = lpfc_findnode_did(vport, PT2PT_RemoteID);
 869                 if (!ndlp) {
 870                         /*
 871                          * Cannot find existing Fabric ndlp, so allocate a
 872                          * new one
 873                          */
 874                         ndlp = lpfc_nlp_init(vport, PT2PT_RemoteID);
 875                         if (!ndlp)
 876                                 goto fail;
 877                 }
 878
 879                 memcpy(&ndlp->nlp_portname, &sp->portName,
 880                        sizeof(struct lpfc_name));
 881                 memcpy(&ndlp->nlp_nodename, &sp->nodeName,
 882                        sizeof(struct lpfc_name));
 883                 /* Set state will put ndlp onto node list if not already done */
 884                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
 885                 spin_lock_irq(&ndlp->lock);
 886                 ndlp->nlp_flag |= NLP_NPR_2B_DISC;
 887                 spin_unlock_irq(&ndlp->lock);
 888
 889                 mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
 890                 if (!mbox)
 891                         goto fail;
 892
 893                 lpfc_config_link(phba, mbox);
 894
 895                 mbox->mbox_cmpl = lpfc_mbx_cmpl_local_config_link;
 896                 mbox->vport = vport;
 897                 rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
 898                 if (rc == MBX_NOT_FINISHED) {
 899                         mempool_free(mbox, phba->mbox_mem_pool);
 900                         goto fail;
 901                 }
 902         } else {
 903                 /* This side will wait for the PLOGI. If not registered with
 904                  * a transport, decrement node reference count indicating that
 905                  * ndlp can be released when other references are removed.
 906                  */
 907                 if (!(ndlp->fc4_xpt_flags & (SCSI_XPT_REGD | NVME_XPT_REGD)))
 908                         lpfc_nlp_put(ndlp);
 909
 910                 /* Start discovery - this should just do CLEAR_LA */
 911                 lpfc_disc_start(vport);
 912         }
 913
 914         return 0;
 915 fail:
 916         return -ENXIO;
 917 }
 918
 919 /**
 920  * lpfc_cmpl_els_flogi - Completion callback function for flogi
 921  * @phba: pointer to lpfc hba data structure.
 922  * @cmdiocb: pointer to lpfc command iocb data structure.
 923  * @rspiocb: pointer to lpfc response iocb data structure.
 924  *
 925  * This routine is the top-level completion callback function for issuing
 926  * a Fabric Login (FLOGI) command. If the response IOCB reported error,
 927  * the lpfc_els_retry() routine shall be invoked to retry the FLOGI. If
 928  * retry has been made (either immediately or delayed with lpfc_els_retry()
 929  * returning 1), the command IOCB will be released and function returned.
 930  * If the retry attempt has been given up (possibly reach the maximum
 931  * number of retries), one additional decrement of ndlp reference shall be
 932  * invoked before going out after releasing the command IOCB. This will
 933  * actually release the remote node (Note, lpfc_els_free_iocb() will also
 934  * invoke one decrement of ndlp reference count). If no error reported in
 935  * the IOCB status, the command Port ID field is used to determine whether
 936  * this is a point-to-point topology or a fabric topology: if the Port ID
 937  * field is assigned, it is a fabric topology; otherwise, it is a
 938  * point-to-point topology. The routine lpfc_cmpl_els_flogi_fabric() or
 939  * lpfc_cmpl_els_flogi_nport() shall be invoked accordingly to handle the
 940  * specific topology completion conditions.
 941  **/
 942 static void
 943 lpfc_cmpl_els_flogi(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
 944                     struct lpfc_iocbq *rspiocb)
 945 {
 946         struct lpfc_vport *vport = cmdiocb->vport;
 947         struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
 948         struct lpfc_nodelist *ndlp = cmdiocb->ndlp;
 949         IOCB_t *irsp;
 950         struct lpfc_dmabuf *pcmd = cmdiocb->cmd_dmabuf, *prsp;
 951         struct serv_parm *sp;
 952         uint16_t fcf_index;
 953         int rc;
 954         u32 ulp_status, ulp_word4, tmo;
 955         bool flogi_in_retry = false;
 956
 957         /* Check to see if link went down during discovery */
 958         if (lpfc_els_chk_latt(vport)) {
 959                 /* One additional decrement on node reference count to
 960                  * trigger the release of the node
 961                  */
 962                 if (!(ndlp->fc4_xpt_flags & SCSI_XPT_REGD))
 963                         lpfc_nlp_put(ndlp);
 964                 goto out;
 965         }
 966
 967         ulp_status = get_job_ulpstatus(phba, rspiocb);
 968         ulp_word4 = get_job_word4(phba, rspiocb);
 969
 970         if (phba->sli_rev == LPFC_SLI_REV4) {
 971                 tmo = get_wqe_tmo(cmdiocb);
 972         } else {
 973                 irsp = &rspiocb->iocb;
 974                 tmo = irsp->ulpTimeout;
 975         }
 976
 977         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
 978                 "FLOGI cmpl:      status:x%x/x%x state:x%x",
 979                 ulp_status, ulp_word4,
 980                 vport->port_state);
 981
 982         if (ulp_status) {
 983                 /*
 984                  * In case of FIP mode, perform roundrobin FCF failover
 985                  * due to new FCF discovery
 986                  */
 987                 if ((phba->hba_flag & HBA_FIP_SUPPORT) &&
 988                     (phba->fcf.fcf_flag & FCF_DISCOVERY)) {
 989                         if (phba->link_state < LPFC_LINK_UP)
 990                                 goto stop_rr_fcf_flogi;
 991                         if ((phba->fcoe_cvl_eventtag_attn ==
 992                              phba->fcoe_cvl_eventtag) &&
 993                             (ulp_status == IOSTAT_LOCAL_REJECT) &&
 994                             ((ulp_word4 & IOERR_PARAM_MASK) ==
 995                             IOERR_SLI_ABORTED))
 996                                 goto stop_rr_fcf_flogi;
 997                         else
 998                                 phba->fcoe_cvl_eventtag_attn =
 999                                         phba->fcoe_cvl_eventtag;
1000                         lpfc_printf_log(phba, KERN_WARNING, LOG_FIP | LOG_ELS,
1001                                         "2611 FLOGI failed on FCF (x%x), "
1002                                         "status:x%x/x%x, tmo:x%x, perform "
1003                                         "roundrobin FCF failover\n",
1004                                         phba->fcf.current_rec.fcf_indx,
1005                                         ulp_status, ulp_word4, tmo);
1006                         lpfc_sli4_set_fcf_flogi_fail(phba,
1007                                         phba->fcf.current_rec.fcf_indx);
1008                         fcf_index = lpfc_sli4_fcf_rr_next_index_get(phba);
1009                         rc = lpfc_sli4_fcf_rr_next_proc(vport, fcf_index);
1010                         if (rc)
1011                                 goto out;
1012                 }
1013
1014 stop_rr_fcf_flogi:
1015                 /* FLOGI failure */
1016                 if (!(ulp_status == IOSTAT_LOCAL_REJECT &&
1017                       ((ulp_word4 & IOERR_PARAM_MASK) ==
1018                                         IOERR_LOOP_OPEN_FAILURE)))
1019                         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
1020                                          "2858 FLOGI failure Status:x%x/x%x TMO"
1021                                          ":x%x Data x%x x%x\n",
1022                                          ulp_status, ulp_word4, tmo,
1023                                          phba->hba_flag, phba->fcf.fcf_flag);
1024
1025                 /* Check for retry */
1026                 if (lpfc_els_retry(phba, cmdiocb, rspiocb)) {
1027                         /* Address a timing race with dev_loss.  If dev_loss
1028                          * is active on this FPort node, put the initial ref
1029                          * count back to stop premature node release actions.
1030                          */
1031                         lpfc_check_nlp_post_devloss(vport, ndlp);
1032                         flogi_in_retry = true;
1033                         goto out;
1034                 }
1035
1036                 /* The FLOGI will not be retried.  If the FPort node is not
1037                  * registered with the SCSI transport, remove the initial
1038                  * reference to trigger node release.
1039                  */
1040                 if (!(ndlp->nlp_flag & NLP_IN_DEV_LOSS) &&
1041                     !(ndlp->fc4_xpt_flags & SCSI_XPT_REGD))
1042                         lpfc_nlp_put(ndlp);
1043
1044                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_TRACE_EVENT,
1045                                  "0150 FLOGI failure Status:x%x/x%x "
1046                                  "xri x%x TMO:x%x refcnt %d\n",
1047                                  ulp_status, ulp_word4, cmdiocb->sli4_xritag,
1048                                  tmo, kref_read(&ndlp->kref));
1049
1050                 /* If this is not a loop open failure, bail out */
1051                 if (!(ulp_status == IOSTAT_LOCAL_REJECT &&
1052                       ((ulp_word4 & IOERR_PARAM_MASK) ==
1053                                         IOERR_LOOP_OPEN_FAILURE))) {
1054                         /* FLOGI failure */
1055                         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
1056                                          "0100 FLOGI failure Status:x%x/x%x "
1057                                          "TMO:x%x\n",
1058                                          ulp_status, ulp_word4, tmo);
1059                         goto flogifail;
1060                 }
1061
1062                 /* FLOGI failed, so there is no fabric */
1063                 spin_lock_irq(shost->host_lock);
1064                 vport->fc_flag &= ~(FC_FABRIC | FC_PUBLIC_LOOP |
1065                                     FC_PT2PT_NO_NVME);
1066                 spin_unlock_irq(shost->host_lock);
1067
1068                 /* If private loop, then allow max outstanding els to be
1069                  * LPFC_MAX_DISC_THREADS (32). Scanning in the case of no
1070                  * alpa map would take too long otherwise.
1071                  */
1072                 if (phba->alpa_map[0] == 0)
1073                         vport->cfg_discovery_threads = LPFC_MAX_DISC_THREADS;
1074                 if ((phba->sli_rev == LPFC_SLI_REV4) &&
1075                     (!(vport->fc_flag & FC_VFI_REGISTERED) ||
1076                      (vport->fc_prevDID != vport->fc_myDID) ||
1077                         phba->fc_topology_changed)) {
1078                         if (vport->fc_flag & FC_VFI_REGISTERED) {
1079                                 if (phba->fc_topology_changed) {
1080                                         lpfc_unregister_fcf_prep(phba);
1081                                         spin_lock_irq(shost->host_lock);
1082                                         vport->fc_flag &= ~FC_VFI_REGISTERED;
1083                                         spin_unlock_irq(shost->host_lock);
1084                                         phba->fc_topology_changed = 0;
1085                                 } else {
1086                                         lpfc_sli4_unreg_all_rpis(vport);
1087                                 }
1088                         }
1089
1090                         /* Do not register VFI if the driver aborted FLOGI */
1091                         if (!lpfc_error_lost_link(vport, ulp_status, ulp_word4))
1092                                 lpfc_issue_reg_vfi(vport);
1093
1094                         lpfc_nlp_put(ndlp);
1095                         goto out;
1096                 }
1097                 goto flogifail;
1098         }
1099         spin_lock_irq(shost->host_lock);
1100         vport->fc_flag &= ~FC_VPORT_CVL_RCVD;
1101         vport->fc_flag &= ~FC_VPORT_LOGO_RCVD;
1102         spin_unlock_irq(shost->host_lock);
1103
1104         /*
1105          * The FLOGI succeeded.  Sync the data for the CPU before
1106          * accessing it.
1107          */
1108         prsp = list_get_first(&pcmd->list, struct lpfc_dmabuf, list);
1109         if (!prsp)
1110                 goto out;
1111         sp = prsp->virt + sizeof(uint32_t);
1112
1113         /* FLOGI completes successfully */
1114         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
1115                          "0101 FLOGI completes successfully, I/O tag:x%x "
1116                          "xri x%x Data: x%x x%x x%x x%x x%x x%x x%x %d\n",
1117                          cmdiocb->iotag, cmdiocb->sli4_xritag,
1118                          ulp_word4, sp->cmn.e_d_tov,
1119                          sp->cmn.w2.r_a_tov, sp->cmn.edtovResolution,
1120                          vport->port_state, vport->fc_flag,
1121                          sp->cmn.priority_tagging, kref_read(&ndlp->kref));
1122
1123         if (sp->cmn.priority_tagging)
1124                 vport->phba->pport->vmid_flag |= (LPFC_VMID_ISSUE_QFPA |
1125                                                   LPFC_VMID_TYPE_PRIO);
1126         /* reinitialize the VMID datastructure before returning */
1127         if (lpfc_is_vmid_enabled(phba))
1128                 lpfc_reinit_vmid(vport);
1129
1130         /*
1131          * Address a timing race with dev_loss.  If dev_loss is active on
1132          * this FPort node, put the initial ref count back to stop premature
1133          * node release actions.
1134          */
1135         lpfc_check_nlp_post_devloss(vport, ndlp);
1136         if (vport->port_state == LPFC_FLOGI) {
1137                 /*
1138                  * If Common Service Parameters indicate Nport
1139                  * we are point to point, if Fport we are Fabric.
1140                  */
1141                 if (sp->cmn.fPort)
1142                         rc = lpfc_cmpl_els_flogi_fabric(vport, ndlp, sp,
1143                                                         ulp_word4);
1144                 else if (!(phba->hba_flag & HBA_FCOE_MODE))
1145                         rc = lpfc_cmpl_els_flogi_nport(vport, ndlp, sp);
1146                 else {
1147                         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
1148                                 "2831 FLOGI response with cleared Fabric "
1149                                 "bit fcf_index 0x%x "
1150                                 "Switch Name %02x%02x%02x%02x%02x%02x%02x%02x "
1151                                 "Fabric Name "
1152                                 "%02x%02x%02x%02x%02x%02x%02x%02x\n",
1153                                 phba->fcf.current_rec.fcf_indx,
1154                                 phba->fcf.current_rec.switch_name[0],
1155                                 phba->fcf.current_rec.switch_name[1],
1156                                 phba->fcf.current_rec.switch_name[2],
1157                                 phba->fcf.current_rec.switch_name[3],
1158                                 phba->fcf.current_rec.switch_name[4],
1159                                 phba->fcf.current_rec.switch_name[5],
1160                                 phba->fcf.current_rec.switch_name[6],
1161                                 phba->fcf.current_rec.switch_name[7],
1162                                 phba->fcf.current_rec.fabric_name[0],
1163                                 phba->fcf.current_rec.fabric_name[1],
1164                                 phba->fcf.current_rec.fabric_name[2],
1165                                 phba->fcf.current_rec.fabric_name[3],
1166                                 phba->fcf.current_rec.fabric_name[4],
1167                                 phba->fcf.current_rec.fabric_name[5],
1168                                 phba->fcf.current_rec.fabric_name[6],
1169                                 phba->fcf.current_rec.fabric_name[7]);
1170
1171                         lpfc_nlp_put(ndlp);
1172                         spin_lock_irq(&phba->hbalock);
1173                         phba->fcf.fcf_flag &= ~FCF_DISCOVERY;
1174                         phba->hba_flag &= ~(FCF_RR_INPROG | HBA_DEVLOSS_TMO);
1175                         spin_unlock_irq(&phba->hbalock);
1176                         phba->fcf.fcf_redisc_attempted = 0; /* reset */
1177                         goto out;
1178                 }
1179                 if (!rc) {
1180                         /* Mark the FCF discovery process done */
1181                         if (phba->hba_flag & HBA_FIP_SUPPORT)
1182                                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FIP |
1183                                                 LOG_ELS,
1184                                                 "2769 FLOGI to FCF (x%x) "
1185                                                 "completed successfully\n",
1186                                                 phba->fcf.current_rec.fcf_indx);
1187                         spin_lock_irq(&phba->hbalock);
1188                         phba->fcf.fcf_flag &= ~FCF_DISCOVERY;
1189                         phba->hba_flag &= ~(FCF_RR_INPROG | HBA_DEVLOSS_TMO);
1190                         spin_unlock_irq(&phba->hbalock);
1191                         phba->fcf.fcf_redisc_attempted = 0; /* reset */
1192                         goto out;
1193                 }
1194         } else if (vport->port_state > LPFC_FLOGI &&
1195                    vport->fc_flag & FC_PT2PT) {
1196                 /*
1197                  * In a p2p topology, it is possible that discovery has
1198                  * already progressed, and this completion can be ignored.
1199                  * Recheck the indicated topology.
1200                  */
1201                 if (!sp->cmn.fPort)
1202                         goto out;
1203         }
1204
1205 flogifail:
1206         spin_lock_irq(&phba->hbalock);
1207         phba->fcf.fcf_flag &= ~FCF_DISCOVERY;
1208         spin_unlock_irq(&phba->hbalock);
1209
1210         if (!lpfc_error_lost_link(vport, ulp_status, ulp_word4)) {
1211                 /* FLOGI failed, so just use loop map to make discovery list */
1212                 lpfc_disc_list_loopmap(vport);
1213
1214                 /* Start discovery */
1215                 lpfc_disc_start(vport);
1216         } else if (((ulp_status != IOSTAT_LOCAL_REJECT) ||
1217                         (((ulp_word4 & IOERR_PARAM_MASK) !=
1218                          IOERR_SLI_ABORTED) &&
1219                         ((ulp_word4 & IOERR_PARAM_MASK) !=
1220                          IOERR_SLI_DOWN))) &&
1221                         (phba->link_state != LPFC_CLEAR_LA)) {
1222                 /* If FLOGI failed enable link interrupt. */
1223                 lpfc_issue_clear_la(phba, vport);
1224         }
1225 out:
1226         if (!flogi_in_retry)
1227                 phba->hba_flag &= ~HBA_FLOGI_OUTSTANDING;
1228
1229         lpfc_els_free_iocb(phba, cmdiocb);
1230         lpfc_nlp_put(ndlp);
1231 }
1232
1233 /**
1234  * lpfc_cmpl_els_link_down - Completion callback function for ELS command
1235  *                           aborted during a link down
1236  * @phba: pointer to lpfc hba data structure.
1237  * @cmdiocb: pointer to lpfc command iocb data structure.
1238  * @rspiocb: pointer to lpfc response iocb data structure.
1239  *
1240  */
1241 static void
1242 lpfc_cmpl_els_link_down(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
1243                         struct lpfc_iocbq *rspiocb)
1244 {
1245         uint32_t *pcmd;
1246         uint32_t cmd;
1247         u32 ulp_status, ulp_word4;
1248
1249         pcmd = (uint32_t *)cmdiocb->cmd_dmabuf->virt;
1250         cmd = *pcmd;
1251
1252         ulp_status = get_job_ulpstatus(phba, rspiocb);
1253         ulp_word4 = get_job_word4(phba, rspiocb);
1254
1255         lpfc_printf_log(phba, KERN_INFO, LOG_ELS,
1256                         "6445 ELS completes after LINK_DOWN: "
1257                         " Status %x/%x cmd x%x flg x%x\n",
1258                         ulp_status, ulp_word4, cmd,
1259                         cmdiocb->cmd_flag);
1260
1261         if (cmdiocb->cmd_flag & LPFC_IO_FABRIC) {
1262                 cmdiocb->cmd_flag &= ~LPFC_IO_FABRIC;
1263                 atomic_dec(&phba->fabric_iocb_count);
1264         }
1265         lpfc_els_free_iocb(phba, cmdiocb);
1266 }
1267
1268 /**
1269  * lpfc_issue_els_flogi - Issue an flogi iocb command for a vport
1270  * @vport: pointer to a host virtual N_Port data structure.
1271  * @ndlp: pointer to a node-list data structure.
1272  * @retry: number of retries to the command IOCB.
1273  *
1274  * This routine issues a Fabric Login (FLOGI) Request ELS command
1275  * for a @vport. The initiator service parameters are put into the payload
1276  * of the FLOGI Request IOCB and the top-level callback function pointer
1277  * to lpfc_cmpl_els_flogi() routine is put to the IOCB completion callback
1278  * function field. The lpfc_issue_fabric_iocb routine is invoked to send
1279  * out FLOGI ELS command with one outstanding fabric IOCB at a time.
1280  *
1281  * Note that the ndlp reference count will be incremented by 1 for holding the
1282  * ndlp and the reference to ndlp will be stored into the ndlp field of
1283  * the IOCB for the completion callback function to the FLOGI ELS command.
1284  *
1285  * Return code
1286  *   0 - successfully issued flogi iocb for @vport
1287  *   1 - failed to issue flogi iocb for @vport
1288  **/
1289 static int
1290 lpfc_issue_els_flogi(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1291                      uint8_t retry)
1292 {
1293         struct lpfc_hba  *phba = vport->phba;
1294         struct serv_parm *sp;
1295         union lpfc_wqe128 *wqe = NULL;
1296         IOCB_t *icmd = NULL;
1297         struct lpfc_iocbq *elsiocb;
1298         struct lpfc_iocbq defer_flogi_acc;
1299         u8 *pcmd, ct;
1300         uint16_t cmdsize;
1301         uint32_t tmo, did;
1302         int rc;
1303
1304         cmdsize = (sizeof(uint32_t) + sizeof(struct serv_parm));
1305         elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, retry, ndlp,
1306                                      ndlp->nlp_DID, ELS_CMD_FLOGI);
1307
1308         if (!elsiocb)
1309                 return 1;
1310
1311         wqe = &elsiocb->wqe;
1312         pcmd = (uint8_t *)elsiocb->cmd_dmabuf->virt;
1313         icmd = &elsiocb->iocb;
1314
1315         /* For FLOGI request, remainder of payload is service parameters */
1316         *((uint32_t *) (pcmd)) = ELS_CMD_FLOGI;
1317         pcmd += sizeof(uint32_t);
1318         memcpy(pcmd, &vport->fc_sparam, sizeof(struct serv_parm));
1319         sp = (struct serv_parm *) pcmd;
1320
1321         /* Setup CSPs accordingly for Fabric */
1322         sp->cmn.e_d_tov = 0;
1323         sp->cmn.w2.r_a_tov = 0;
1324         sp->cmn.virtual_fabric_support = 0;
1325         sp->cls1.classValid = 0;
1326         if (sp->cmn.fcphLow < FC_PH3)
1327                 sp->cmn.fcphLow = FC_PH3;
1328         if (sp->cmn.fcphHigh < FC_PH3)
1329                 sp->cmn.fcphHigh = FC_PH3;
1330
1331         /* Determine if switch supports priority tagging */
1332         if (phba->cfg_vmid_priority_tagging) {
1333                 sp->cmn.priority_tagging = 1;
1334                 /* lpfc_vmid_host_uuid is combination of wwpn and wwnn */
1335                 if (uuid_is_null((uuid_t *)vport->lpfc_vmid_host_uuid)) {
1336                         memcpy(vport->lpfc_vmid_host_uuid, phba->wwpn,
1337                                sizeof(phba->wwpn));
1338                         memcpy(&vport->lpfc_vmid_host_uuid[8], phba->wwnn,
1339                                sizeof(phba->wwnn));
1340                 }
1341         }
1342
1343         if  (phba->sli_rev == LPFC_SLI_REV4) {
1344                 if (bf_get(lpfc_sli_intf_if_type, &phba->sli4_hba.sli_intf) ==
1345                     LPFC_SLI_INTF_IF_TYPE_0) {
1346                         /* FLOGI needs to be 3 for WQE FCFI */
1347                         ct = SLI4_CT_FCFI;
1348                         bf_set(wqe_ct, &wqe->els_req.wqe_com, ct);
1349
1350                         /* Set the fcfi to the fcfi we registered with */
1351                         bf_set(wqe_ctxt_tag, &wqe->els_req.wqe_com,
1352                                phba->fcf.fcfi);
1353                 }
1354
1355                 /* Can't do SLI4 class2 without support sequence coalescing */
1356                 sp->cls2.classValid = 0;
1357                 sp->cls2.seqDelivery = 0;
1358         } else {
1359                 /* Historical, setting sequential-delivery bit for SLI3 */
1360                 sp->cls2.seqDelivery = (sp->cls2.classValid) ? 1 : 0;
1361                 sp->cls3.seqDelivery = (sp->cls3.classValid) ? 1 : 0;
1362                 if (phba->sli3_options & LPFC_SLI3_NPIV_ENABLED) {
1363                         sp->cmn.request_multiple_Nport = 1;
1364                         /* For FLOGI, Let FLOGI rsp set the NPortID for VPI 0 */
1365                         icmd->ulpCt_h = 1;
1366                         icmd->ulpCt_l = 0;
1367                 } else {
1368                         sp->cmn.request_multiple_Nport = 0;
1369                 }
1370
1371                 if (phba->fc_topology != LPFC_TOPOLOGY_LOOP) {
1372                         icmd->un.elsreq64.myID = 0;
1373                         icmd->un.elsreq64.fl = 1;
1374                 }
1375         }
1376
1377         tmo = phba->fc_ratov;
1378         phba->fc_ratov = LPFC_DISC_FLOGI_TMO;
1379         lpfc_set_disctmo(vport);
1380         phba->fc_ratov = tmo;
1381
1382         phba->fc_stat.elsXmitFLOGI++;
1383         elsiocb->cmd_cmpl = lpfc_cmpl_els_flogi;
1384
1385         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
1386                 "Issue FLOGI:     opt:x%x",
1387                 phba->sli3_options, 0, 0);
1388
1389         elsiocb->ndlp = lpfc_nlp_get(ndlp);
1390         if (!elsiocb->ndlp) {
1391                 lpfc_els_free_iocb(phba, elsiocb);
1392                 return 1;
1393         }
1394
1395         /* Avoid race with FLOGI completion and hba_flags. */
1396         phba->hba_flag |= (HBA_FLOGI_ISSUED | HBA_FLOGI_OUTSTANDING);
1397
1398         rc = lpfc_issue_fabric_iocb(phba, elsiocb);
1399         if (rc == IOCB_ERROR) {
1400                 phba->hba_flag &= ~(HBA_FLOGI_ISSUED | HBA_FLOGI_OUTSTANDING);
1401                 lpfc_els_free_iocb(phba, elsiocb);
1402                 lpfc_nlp_put(ndlp);
1403                 return 1;
1404         }
1405
1406         /* Clear external loopback plug detected flag */
1407         phba->link_flag &= ~LS_EXTERNAL_LOOPBACK;
1408
1409         /* Check for a deferred FLOGI ACC condition */
1410         if (phba->defer_flogi_acc_flag) {
1411                 /* lookup ndlp for received FLOGI */
1412                 ndlp = lpfc_findnode_did(vport, 0);
1413                 if (!ndlp)
1414                         return 0;
1415
1416                 did = vport->fc_myDID;
1417                 vport->fc_myDID = Fabric_DID;
1418
1419                 memset(&defer_flogi_acc, 0, sizeof(struct lpfc_iocbq));
1420
1421                 if (phba->sli_rev == LPFC_SLI_REV4) {
1422                         bf_set(wqe_ctxt_tag,
1423                                &defer_flogi_acc.wqe.xmit_els_rsp.wqe_com,
1424                                phba->defer_flogi_acc_rx_id);
1425                         bf_set(wqe_rcvoxid,
1426                                &defer_flogi_acc.wqe.xmit_els_rsp.wqe_com,
1427                                phba->defer_flogi_acc_ox_id);
1428                 } else {
1429                         icmd = &defer_flogi_acc.iocb;
1430                         icmd->ulpContext = phba->defer_flogi_acc_rx_id;
1431                         icmd->unsli3.rcvsli3.ox_id =
1432                                 phba->defer_flogi_acc_ox_id;
1433                 }
1434
1435                 lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
1436                                  "3354 Xmit deferred FLOGI ACC: rx_id: x%x,"
1437                                  " ox_id: x%x, hba_flag x%x\n",
1438                                  phba->defer_flogi_acc_rx_id,
1439                                  phba->defer_flogi_acc_ox_id, phba->hba_flag);
1440
1441                 /* Send deferred FLOGI ACC */
1442                 lpfc_els_rsp_acc(vport, ELS_CMD_FLOGI, &defer_flogi_acc,
1443                                  ndlp, NULL);
1444
1445                 phba->defer_flogi_acc_flag = false;
1446                 vport->fc_myDID = did;
1447
1448                 /* Decrement ndlp reference count to indicate the node can be
1449                  * released when other references are removed.
1450                  */
1451                 lpfc_nlp_put(ndlp);
1452         }
1453
1454         return 0;
1455 }
1456
1457 /**
1458  * lpfc_els_abort_flogi - Abort all outstanding flogi iocbs
1459  * @phba: pointer to lpfc hba data structure.
1460  *
1461  * This routine aborts all the outstanding Fabric Login (FLOGI) IOCBs
1462  * with a @phba. This routine walks all the outstanding IOCBs on the txcmplq
1463  * list and issues an abort IOCB commond on each outstanding IOCB that
1464  * contains a active Fabric_DID ndlp. Note that this function is to issue
1465  * the abort IOCB command on all the outstanding IOCBs, thus when this
1466  * function returns, it does not guarantee all the IOCBs are actually aborted.
1467  *
1468  * Return code
1469  *   0 - Successfully issued abort iocb on all outstanding flogis (Always 0)
1470  **/
1471 int
1472 lpfc_els_abort_flogi(struct lpfc_hba *phba)
1473 {
1474         struct lpfc_sli_ring *pring;
1475         struct lpfc_iocbq *iocb, *next_iocb;
1476         struct lpfc_nodelist *ndlp;
1477         u32 ulp_command;
1478
1479         /* Abort outstanding I/O on NPort <nlp_DID> */
1480         lpfc_printf_log(phba, KERN_INFO, LOG_DISCOVERY,
1481                         "0201 Abort outstanding I/O on NPort x%x\n",
1482                         Fabric_DID);
1483
1484         pring = lpfc_phba_elsring(phba);
1485         if (unlikely(!pring))
1486                 return -EIO;
1487
1488         /*
1489          * Check the txcmplq for an iocb that matches the nport the driver is
1490          * searching for.
1491          */
1492         spin_lock_irq(&phba->hbalock);
1493         list_for_each_entry_safe(iocb, next_iocb, &pring->txcmplq, list) {
1494                 ulp_command = get_job_cmnd(phba, iocb);
1495                 if (ulp_command == CMD_ELS_REQUEST64_CR) {
1496                         ndlp = iocb->ndlp;
1497                         if (ndlp && ndlp->nlp_DID == Fabric_DID) {
1498                                 if ((phba->pport->fc_flag & FC_PT2PT) &&
1499                                     !(phba->pport->fc_flag & FC_PT2PT_PLOGI))
1500                                         iocb->fabric_cmd_cmpl =
1501                                                 lpfc_ignore_els_cmpl;
1502                                 lpfc_sli_issue_abort_iotag(phba, pring, iocb,
1503                                                            NULL);
1504                         }
1505                 }
1506         }
1507         /* Make sure HBA is alive */
1508         lpfc_issue_hb_tmo(phba);
1509
1510         spin_unlock_irq(&phba->hbalock);
1511
1512         return 0;
1513 }
1514
1515 /**
1516  * lpfc_initial_flogi - Issue an initial fabric login for a vport
1517  * @vport: pointer to a host virtual N_Port data structure.
1518  *
1519  * This routine issues an initial Fabric Login (FLOGI) for the @vport
1520  * specified. It first searches the ndlp with the Fabric_DID (0xfffffe) from
1521  * the @vport's ndlp list. If no such ndlp found, it will create an ndlp and
1522  * put it into the @vport's ndlp list. If an inactive ndlp found on the list,
1523  * it will just be enabled and made active. The lpfc_issue_els_flogi() routine
1524  * is then invoked with the @vport and the ndlp to perform the FLOGI for the
1525  * @vport.
1526  *
1527  * Return code
1528  *   0 - failed to issue initial flogi for @vport
1529  *   1 - successfully issued initial flogi for @vport
1530  **/
1531 int
1532 lpfc_initial_flogi(struct lpfc_vport *vport)
1533 {
1534         struct lpfc_nodelist *ndlp;
1535
1536         vport->port_state = LPFC_FLOGI;
1537         lpfc_set_disctmo(vport);
1538
1539         /* First look for the Fabric ndlp */
1540         ndlp = lpfc_findnode_did(vport, Fabric_DID);
1541         if (!ndlp) {
1542                 /* Cannot find existing Fabric ndlp, so allocate a new one */
1543                 ndlp = lpfc_nlp_init(vport, Fabric_DID);
1544                 if (!ndlp)
1545                         return 0;
1546                 /* Set the node type */
1547                 ndlp->nlp_type |= NLP_FABRIC;
1548
1549                 /* Put ndlp onto node list */
1550                 lpfc_enqueue_node(vport, ndlp);
1551         }
1552
1553         /* Reset the Fabric flag, topology change may have happened */
1554         vport->fc_flag &= ~FC_FABRIC;
1555         if (lpfc_issue_els_flogi(vport, ndlp, 0)) {
1556                 /* A node reference should be retained while registered with a
1557                  * transport or dev-loss-evt work is pending.
1558                  * Otherwise, decrement node reference to trigger release.
1559                  */
1560                 if (!(ndlp->fc4_xpt_flags & (SCSI_XPT_REGD | NVME_XPT_REGD)) &&
1561                     !(ndlp->nlp_flag & NLP_IN_DEV_LOSS))
1562                         lpfc_nlp_put(ndlp);
1563                 return 0;
1564         }
1565         return 1;
1566 }
1567
1568 /**
1569  * lpfc_initial_fdisc - Issue an initial fabric discovery for a vport
1570  * @vport: pointer to a host virtual N_Port data structure.
1571  *
1572  * This routine issues an initial Fabric Discover (FDISC) for the @vport
1573  * specified. It first searches the ndlp with the Fabric_DID (0xfffffe) from
1574  * the @vport's ndlp list. If no such ndlp found, it will create an ndlp and
1575  * put it into the @vport's ndlp list. If an inactive ndlp found on the list,
1576  * it will just be enabled and made active. The lpfc_issue_els_fdisc() routine
1577  * is then invoked with the @vport and the ndlp to perform the FDISC for the
1578  * @vport.
1579  *
1580  * Return code
1581  *   0 - failed to issue initial fdisc for @vport
1582  *   1 - successfully issued initial fdisc for @vport
1583  **/
1584 int
1585 lpfc_initial_fdisc(struct lpfc_vport *vport)
1586 {
1587         struct lpfc_nodelist *ndlp;
1588
1589         /* First look for the Fabric ndlp */
1590         ndlp = lpfc_findnode_did(vport, Fabric_DID);
1591         if (!ndlp) {
1592                 /* Cannot find existing Fabric ndlp, so allocate a new one */
1593                 ndlp = lpfc_nlp_init(vport, Fabric_DID);
1594                 if (!ndlp)
1595                         return 0;
1596
1597                 /* NPIV is only supported in Fabrics. */
1598                 ndlp->nlp_type |= NLP_FABRIC;
1599
1600                 /* Put ndlp onto node list */
1601                 lpfc_enqueue_node(vport, ndlp);
1602         }
1603
1604         if (lpfc_issue_els_fdisc(vport, ndlp, 0)) {
1605                 /* A node reference should be retained while registered with a
1606                  * transport or dev-loss-evt work is pending.
1607                  * Otherwise, decrement node reference to trigger release.
1608                  */
1609                 if (!(ndlp->fc4_xpt_flags & (SCSI_XPT_REGD | NVME_XPT_REGD)) &&
1610                     !(ndlp->nlp_flag & NLP_IN_DEV_LOSS))
1611                         lpfc_nlp_put(ndlp);
1612                 return 0;
1613         }
1614         return 1;
1615 }
1616
1617 /**
1618  * lpfc_more_plogi - Check and issue remaining plogis for a vport
1619  * @vport: pointer to a host virtual N_Port data structure.
1620  *
1621  * This routine checks whether there are more remaining Port Logins
1622  * (PLOGI) to be issued for the @vport. If so, it will invoke the routine
1623  * lpfc_els_disc_plogi() to go through the Node Port Recovery (NPR) nodes
1624  * to issue ELS PLOGIs up to the configured discover threads with the
1625  * @vport (@vport->cfg_discovery_threads). The function also decrement
1626  * the @vport's num_disc_node by 1 if it is not already 0.
1627  **/
1628 void
1629 lpfc_more_plogi(struct lpfc_vport *vport)
1630 {
1631         if (vport->num_disc_nodes)
1632                 vport->num_disc_nodes--;
1633
1634         /* Continue discovery with <num_disc_nodes> PLOGIs to go */
1635         lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
1636                          "0232 Continue discovery with %d PLOGIs to go "
1637                          "Data: x%x x%x x%x\n",
1638                          vport->num_disc_nodes, vport->fc_plogi_cnt,
1639                          vport->fc_flag, vport->port_state);
1640         /* Check to see if there are more PLOGIs to be sent */
1641         if (vport->fc_flag & FC_NLP_MORE)
1642                 /* go thru NPR nodes and issue any remaining ELS PLOGIs */
1643                 lpfc_els_disc_plogi(vport);
1644
1645         return;
1646 }
1647
1648 /**
1649  * lpfc_plogi_confirm_nport - Confirm plogi wwpn matches stored ndlp
1650  * @phba: pointer to lpfc hba data structure.
1651  * @prsp: pointer to response IOCB payload.
1652  * @ndlp: pointer to a node-list data structure.
1653  *
1654  * This routine checks and indicates whether the WWPN of an N_Port, retrieved
1655  * from a PLOGI, matches the WWPN that is stored in the @ndlp for that N_POrt.
1656  * The following cases are considered N_Port confirmed:
1657  * 1) The N_Port is a Fabric ndlp; 2) The @ndlp is on vport list and matches
1658  * the WWPN of the N_Port logged into; 3) The @ndlp is not on vport list but
1659  * it does not have WWPN assigned either. If the WWPN is confirmed, the
1660  * pointer to the @ndlp will be returned. If the WWPN is not confirmed:
1661  * 1) if there is a node on vport list other than the @ndlp with the same
1662  * WWPN of the N_Port PLOGI logged into, the lpfc_unreg_rpi() will be invoked
1663  * on that node to release the RPI associated with the node; 2) if there is
1664  * no node found on vport list with the same WWPN of the N_Port PLOGI logged
1665  * into, a new node shall be allocated (or activated). In either case, the
1666  * parameters of the @ndlp shall be copied to the new_ndlp, the @ndlp shall
1667  * be released and the new_ndlp shall be put on to the vport node list and
1668  * its pointer returned as the confirmed node.
1669  *
1670  * Note that before the @ndlp got "released", the keepDID from not-matching
1671  * or inactive "new_ndlp" on the vport node list is assigned to the nlp_DID
1672  * of the @ndlp. This is because the release of @ndlp is actually to put it
1673  * into an inactive state on the vport node list and the vport node list
1674  * management algorithm does not allow two node with a same DID.
1675  *
1676  * Return code
1677  *   pointer to the PLOGI N_Port @ndlp
1678  **/
1679 static struct lpfc_nodelist *
1680 lpfc_plogi_confirm_nport(struct lpfc_hba *phba, uint32_t *prsp,
1681                          struct lpfc_nodelist *ndlp)
1682 {
1683         struct lpfc_vport *vport = ndlp->vport;
1684         struct lpfc_nodelist *new_ndlp;
1685         struct serv_parm *sp;
1686         uint8_t  name[sizeof(struct lpfc_name)];
1687         uint32_t keepDID = 0, keep_nlp_flag = 0;
1688         uint32_t keep_new_nlp_flag = 0;
1689         uint16_t keep_nlp_state;
1690         u32 keep_nlp_fc4_type = 0;
1691         struct lpfc_nvme_rport *keep_nrport = NULL;
1692         unsigned long *active_rrqs_xri_bitmap = NULL;
1693
1694         /* Fabric nodes can have the same WWPN so we don't bother searching
1695          * by WWPN.  Just return the ndlp that was given to us.
1696          */
1697         if (ndlp->nlp_type & NLP_FABRIC)
1698                 return ndlp;
1699
1700         sp = (struct serv_parm *) ((uint8_t *) prsp + sizeof(uint32_t));
1701         memset(name, 0, sizeof(struct lpfc_name));
1702
1703         /* Now we find out if the NPort we are logging into, matches the WWPN
1704          * we have for that ndlp. If not, we have some work to do.
1705          */
1706         new_ndlp = lpfc_findnode_wwpn(vport, &sp->portName);
1707
1708         /* return immediately if the WWPN matches ndlp */
1709         if (!new_ndlp || (new_ndlp == ndlp))
1710                 return ndlp;
1711
1712         /*
1713          * Unregister from backend if not done yet. Could have been skipped
1714          * due to ADISC
1715          */
1716         lpfc_nlp_unreg_node(vport, new_ndlp);
1717
1718         if (phba->sli_rev == LPFC_SLI_REV4) {
1719                 active_rrqs_xri_bitmap = mempool_alloc(phba->active_rrq_pool,
1720                                                        GFP_KERNEL);
1721                 if (active_rrqs_xri_bitmap)
1722                         memset(active_rrqs_xri_bitmap, 0,
1723                                phba->cfg_rrq_xri_bitmap_sz);
1724         }
1725
1726         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS | LOG_NODE,
1727                          "3178 PLOGI confirm: ndlp x%x x%x x%x: "
1728                          "new_ndlp x%x x%x x%x\n",
1729                          ndlp->nlp_DID, ndlp->nlp_flag,  ndlp->nlp_fc4_type,
1730                          (new_ndlp ? new_ndlp->nlp_DID : 0),
1731                          (new_ndlp ? new_ndlp->nlp_flag : 0),
1732                          (new_ndlp ? new_ndlp->nlp_fc4_type : 0));
1733
1734         keepDID = new_ndlp->nlp_DID;
1735
1736         if (phba->sli_rev == LPFC_SLI_REV4 && active_rrqs_xri_bitmap)
1737                 memcpy(active_rrqs_xri_bitmap, new_ndlp->active_rrqs_xri_bitmap,
1738                        phba->cfg_rrq_xri_bitmap_sz);
1739
1740         /* At this point in this routine, we know new_ndlp will be
1741          * returned. however, any previous GID_FTs that were done
1742          * would have updated nlp_fc4_type in ndlp, so we must ensure
1743          * new_ndlp has the right value.
1744          */
1745         if (vport->fc_flag & FC_FABRIC) {
1746                 keep_nlp_fc4_type = new_ndlp->nlp_fc4_type;
1747                 new_ndlp->nlp_fc4_type = ndlp->nlp_fc4_type;
1748         }
1749
1750         lpfc_unreg_rpi(vport, new_ndlp);
1751         new_ndlp->nlp_DID = ndlp->nlp_DID;
1752         new_ndlp->nlp_prev_state = ndlp->nlp_prev_state;
1753         if (phba->sli_rev == LPFC_SLI_REV4)
1754                 memcpy(new_ndlp->active_rrqs_xri_bitmap,
1755                        ndlp->active_rrqs_xri_bitmap,
1756                        phba->cfg_rrq_xri_bitmap_sz);
1757
1758         /* Lock both ndlps */
1759         spin_lock_irq(&ndlp->lock);
1760         spin_lock_irq(&new_ndlp->lock);
1761         keep_new_nlp_flag = new_ndlp->nlp_flag;
1762         keep_nlp_flag = ndlp->nlp_flag;
1763         new_ndlp->nlp_flag = ndlp->nlp_flag;
1764
1765         /* if new_ndlp had NLP_UNREG_INP set, keep it */
1766         if (keep_new_nlp_flag & NLP_UNREG_INP)
1767                 new_ndlp->nlp_flag |= NLP_UNREG_INP;
1768         else
1769                 new_ndlp->nlp_flag &= ~NLP_UNREG_INP;
1770
1771         /* if new_ndlp had NLP_RPI_REGISTERED set, keep it */
1772         if (keep_new_nlp_flag & NLP_RPI_REGISTERED)
1773                 new_ndlp->nlp_flag |= NLP_RPI_REGISTERED;
1774         else
1775                 new_ndlp->nlp_flag &= ~NLP_RPI_REGISTERED;
1776
1777         /*
1778          * Retain the DROPPED flag. This will take care of the init
1779          * refcount when affecting the state change
1780          */
1781         if (keep_new_nlp_flag & NLP_DROPPED)
1782                 new_ndlp->nlp_flag |= NLP_DROPPED;
1783         else
1784                 new_ndlp->nlp_flag &= ~NLP_DROPPED;
1785
1786         ndlp->nlp_flag = keep_new_nlp_flag;
1787
1788         /* if ndlp had NLP_UNREG_INP set, keep it */
1789         if (keep_nlp_flag & NLP_UNREG_INP)
1790                 ndlp->nlp_flag |= NLP_UNREG_INP;
1791         else
1792                 ndlp->nlp_flag &= ~NLP_UNREG_INP;
1793
1794         /* if ndlp had NLP_RPI_REGISTERED set, keep it */
1795         if (keep_nlp_flag & NLP_RPI_REGISTERED)
1796                 ndlp->nlp_flag |= NLP_RPI_REGISTERED;
1797         else
1798                 ndlp->nlp_flag &= ~NLP_RPI_REGISTERED;
1799
1800         /*
1801          * Retain the DROPPED flag. This will take care of the init
1802          * refcount when affecting the state change
1803          */
1804         if (keep_nlp_flag & NLP_DROPPED)
1805                 ndlp->nlp_flag |= NLP_DROPPED;
1806         else
1807                 ndlp->nlp_flag &= ~NLP_DROPPED;
1808
1809         spin_unlock_irq(&new_ndlp->lock);
1810         spin_unlock_irq(&ndlp->lock);
1811
1812         /* Set nlp_states accordingly */
1813         keep_nlp_state = new_ndlp->nlp_state;
1814         lpfc_nlp_set_state(vport, new_ndlp, ndlp->nlp_state);
1815
1816         /* interchange the nvme remoteport structs */
1817         keep_nrport = new_ndlp->nrport;
1818         new_ndlp->nrport = ndlp->nrport;
1819
1820         /* Move this back to NPR state */
1821         if (memcmp(&ndlp->nlp_portname, name, sizeof(struct lpfc_name)) == 0) {
1822                 /* The ndlp doesn't have a portname yet, but does have an
1823                  * NPort ID.  The new_ndlp portname matches the Rport's
1824                  * portname.  Reinstantiate the new_ndlp and reset the ndlp.
1825                  */
1826                 lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
1827                          "3179 PLOGI confirm NEW: %x %x\n",
1828                          new_ndlp->nlp_DID, keepDID);
1829
1830                 /* Two ndlps cannot have the same did on the nodelist.
1831                  * The KeepDID and keep_nlp_fc4_type need to be swapped
1832                  * because ndlp is inflight with no WWPN.
1833                  */
1834                 ndlp->nlp_DID = keepDID;
1835                 ndlp->nlp_fc4_type = keep_nlp_fc4_type;
1836                 lpfc_nlp_set_state(vport, ndlp, keep_nlp_state);
1837                 if (phba->sli_rev == LPFC_SLI_REV4 &&
1838                     active_rrqs_xri_bitmap)
1839                         memcpy(ndlp->active_rrqs_xri_bitmap,
1840                                active_rrqs_xri_bitmap,
1841                                phba->cfg_rrq_xri_bitmap_sz);
1842
1843         } else {
1844                 lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
1845                          "3180 PLOGI confirm SWAP: %x %x\n",
1846                          new_ndlp->nlp_DID, keepDID);
1847
1848                 lpfc_unreg_rpi(vport, ndlp);
1849
1850                 /* The ndlp and new_ndlp both have WWPNs but are swapping
1851                  * NPort Ids and attributes.
1852                  */
1853                 ndlp->nlp_DID = keepDID;
1854                 ndlp->nlp_fc4_type = keep_nlp_fc4_type;
1855
1856                 if (phba->sli_rev == LPFC_SLI_REV4 &&
1857                     active_rrqs_xri_bitmap)
1858                         memcpy(ndlp->active_rrqs_xri_bitmap,
1859                                active_rrqs_xri_bitmap,
1860                                phba->cfg_rrq_xri_bitmap_sz);
1861
1862                 /* Since we are switching over to the new_ndlp,
1863                  * reset the old ndlp state
1864                  */
1865                 if ((ndlp->nlp_state == NLP_STE_UNMAPPED_NODE) ||
1866                     (ndlp->nlp_state == NLP_STE_MAPPED_NODE))
1867                         keep_nlp_state = NLP_STE_NPR_NODE;
1868                 lpfc_nlp_set_state(vport, ndlp, keep_nlp_state);
1869                 ndlp->nrport = keep_nrport;
1870         }
1871
1872         /*
1873          * If ndlp is not associated with any rport we can drop it here else
1874          * let dev_loss_tmo_callbk trigger DEVICE_RM event
1875          */
1876         if (!ndlp->rport && (ndlp->nlp_state == NLP_STE_NPR_NODE))
1877                 lpfc_disc_state_machine(vport, ndlp, NULL, NLP_EVT_DEVICE_RM);
1878
1879         if (phba->sli_rev == LPFC_SLI_REV4 &&
1880             active_rrqs_xri_bitmap)
1881                 mempool_free(active_rrqs_xri_bitmap,
1882                              phba->active_rrq_pool);
1883
1884         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS | LOG_NODE,
1885                          "3173 PLOGI confirm exit: new_ndlp x%x x%x x%x\n",
1886                          new_ndlp->nlp_DID, new_ndlp->nlp_flag,
1887                          new_ndlp->nlp_fc4_type);
1888
1889         return new_ndlp;
1890 }
1891
1892 /**
1893  * lpfc_end_rscn - Check and handle more rscn for a vport
1894  * @vport: pointer to a host virtual N_Port data structure.
1895  *
1896  * This routine checks whether more Registration State Change
1897  * Notifications (RSCNs) came in while the discovery state machine was in
1898  * the FC_RSCN_MODE. If so, the lpfc_els_handle_rscn() routine will be
1899  * invoked to handle the additional RSCNs for the @vport. Otherwise, the
1900  * FC_RSCN_MODE bit will be cleared with the @vport to mark as the end of
1901  * handling the RSCNs.
1902  **/
1903 void
1904 lpfc_end_rscn(struct lpfc_vport *vport)
1905 {
1906         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1907
1908         if (vport->fc_flag & FC_RSCN_MODE) {
1909                 /*
1910                  * Check to see if more RSCNs came in while we were
1911                  * processing this one.
1912                  */
1913                 if (vport->fc_rscn_id_cnt ||
1914                     (vport->fc_flag & FC_RSCN_DISCOVERY) != 0)
1915                         lpfc_els_handle_rscn(vport);
1916                 else {
1917                         spin_lock_irq(shost->host_lock);
1918                         vport->fc_flag &= ~FC_RSCN_MODE;
1919                         spin_unlock_irq(shost->host_lock);
1920                 }
1921         }
1922 }
1923
1924 /**
1925  * lpfc_cmpl_els_rrq - Completion handled for els RRQs.
1926  * @phba: pointer to lpfc hba data structure.
1927  * @cmdiocb: pointer to lpfc command iocb data structure.
1928  * @rspiocb: pointer to lpfc response iocb data structure.
1929  *
1930  * This routine will call the clear rrq function to free the rrq and
1931  * clear the xri's bit in the ndlp's xri_bitmap. If the ndlp does not
1932  * exist then the clear_rrq is still called because the rrq needs to
1933  * be freed.
1934  **/
1935
1936 static void
1937 lpfc_cmpl_els_rrq(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
1938                   struct lpfc_iocbq *rspiocb)
1939 {
1940         struct lpfc_vport *vport = cmdiocb->vport;
1941         struct lpfc_nodelist *ndlp = cmdiocb->ndlp;
1942         struct lpfc_node_rrq *rrq;
1943         u32 ulp_status = get_job_ulpstatus(phba, rspiocb);
1944         u32 ulp_word4 = get_job_word4(phba, rspiocb);
1945
1946         /* we pass cmdiocb to state machine which needs rspiocb as well */
1947         rrq = cmdiocb->context_un.rrq;
1948         cmdiocb->rsp_iocb = rspiocb;
1949
1950         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
1951                 "RRQ cmpl:      status:x%x/x%x did:x%x",
1952                 ulp_status, ulp_word4,
1953                 get_job_els_rsp64_did(phba, cmdiocb));
1954
1955
1956         /* rrq completes to NPort <nlp_DID> */
1957         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
1958                          "2880 RRQ completes to DID x%x "
1959                          "Data: x%x x%x x%x x%x x%x\n",
1960                          ndlp->nlp_DID, ulp_status, ulp_word4,
1961                          get_wqe_tmo(cmdiocb), rrq->xritag, rrq->rxid);
1962
1963         if (ulp_status) {
1964                 /* Check for retry */
1965                 /* RRQ failed Don't print the vport to vport rjts */
1966                 if (ulp_status != IOSTAT_LS_RJT ||
1967                     (((ulp_word4) >> 16 != LSRJT_INVALID_CMD) &&
1968                      ((ulp_word4) >> 16 != LSRJT_UNABLE_TPC)) ||
1969                     (phba)->pport->cfg_log_verbose & LOG_ELS)
1970                         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
1971                                          "2881 RRQ failure DID:%06X Status:"
1972                                          "x%x/x%x\n",
1973                                          ndlp->nlp_DID, ulp_status,
1974                                          ulp_word4);
1975         }
1976
1977         lpfc_clr_rrq_active(phba, rrq->xritag, rrq);
1978         lpfc_els_free_iocb(phba, cmdiocb);
1979         lpfc_nlp_put(ndlp);
1980         return;
1981 }
1982 /**
1983  * lpfc_cmpl_els_plogi - Completion callback function for plogi
1984  * @phba: pointer to lpfc hba data structure.
1985  * @cmdiocb: pointer to lpfc command iocb data structure.
1986  * @rspiocb: pointer to lpfc response iocb data structure.
1987  *
1988  * This routine is the completion callback function for issuing the Port
1989  * Login (PLOGI) command. For PLOGI completion, there must be an active
1990  * ndlp on the vport node list that matches the remote node ID from the
1991  * PLOGI response IOCB. If such ndlp does not exist, the PLOGI is simply
1992  * ignored and command IOCB released. The PLOGI response IOCB status is
1993  * checked for error conditions. If there is error status reported, PLOGI
1994  * retry shall be attempted by invoking the lpfc_els_retry() routine.
1995  * Otherwise, the lpfc_plogi_confirm_nport() routine shall be invoked on
1996  * the ndlp and the NLP_EVT_CMPL_PLOGI state to the Discover State Machine
1997  * (DSM) is set for this PLOGI completion. Finally, it checks whether
1998  * there are additional N_Port nodes with the vport that need to perform
1999  * PLOGI. If so, the lpfc_more_plogi() routine is invoked to issue addition
2000  * PLOGIs.
2001  **/
2002 static void
2003 lpfc_cmpl_els_plogi(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
2004                     struct lpfc_iocbq *rspiocb)
2005 {
2006         struct lpfc_vport *vport = cmdiocb->vport;
2007         struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
2008         IOCB_t *irsp;
2009         struct lpfc_nodelist *ndlp, *free_ndlp;
2010         struct lpfc_dmabuf *prsp;
2011         int disc;
2012         struct serv_parm *sp = NULL;
2013         u32 ulp_status, ulp_word4, did, iotag;
2014         bool release_node = false;
2015
2016         /* we pass cmdiocb to state machine which needs rspiocb as well */
2017         cmdiocb->rsp_iocb = rspiocb;
2018
2019         ulp_status = get_job_ulpstatus(phba, rspiocb);
2020         ulp_word4 = get_job_word4(phba, rspiocb);
2021         did = get_job_els_rsp64_did(phba, cmdiocb);
2022
2023         if (phba->sli_rev == LPFC_SLI_REV4) {
2024                 iotag = get_wqe_reqtag(cmdiocb);
2025         } else {
2026                 irsp = &rspiocb->iocb;
2027                 iotag = irsp->ulpIoTag;
2028         }
2029
2030         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
2031                 "PLOGI cmpl:      status:x%x/x%x did:x%x",
2032                 ulp_status, ulp_word4, did);
2033
2034         ndlp = lpfc_findnode_did(vport, did);
2035         if (!ndlp) {
2036                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
2037                                  "0136 PLOGI completes to NPort x%x "
2038                                  "with no ndlp. Data: x%x x%x x%x\n",
2039                                  did, ulp_status, ulp_word4, iotag);
2040                 goto out_freeiocb;
2041         }
2042
2043         /* Since ndlp can be freed in the disc state machine, note if this node
2044          * is being used during discovery.
2045          */
2046         spin_lock_irq(&ndlp->lock);
2047         disc = (ndlp->nlp_flag & NLP_NPR_2B_DISC);
2048         ndlp->nlp_flag &= ~NLP_NPR_2B_DISC;
2049         spin_unlock_irq(&ndlp->lock);
2050
2051         /* PLOGI completes to NPort <nlp_DID> */
2052         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
2053                          "0102 PLOGI completes to NPort x%06x "
2054                          "Data: x%x x%x x%x x%x x%x\n",
2055                          ndlp->nlp_DID, ndlp->nlp_fc4_type,
2056                          ulp_status, ulp_word4,
2057                          disc, vport->num_disc_nodes);
2058
2059         /* Check to see if link went down during discovery */
2060         if (lpfc_els_chk_latt(vport)) {
2061                 spin_lock_irq(&ndlp->lock);
2062                 ndlp->nlp_flag |= NLP_NPR_2B_DISC;
2063                 spin_unlock_irq(&ndlp->lock);
2064                 goto out;
2065         }
2066
2067         if (ulp_status) {
2068                 /* Check for retry */
2069                 if (lpfc_els_retry(phba, cmdiocb, rspiocb)) {
2070                         /* ELS command is being retried */
2071                         if (disc) {
2072                                 spin_lock_irq(&ndlp->lock);
2073                                 ndlp->nlp_flag |= NLP_NPR_2B_DISC;
2074                                 spin_unlock_irq(&ndlp->lock);
2075                         }
2076                         goto out;
2077                 }
2078                 /* PLOGI failed Don't print the vport to vport rjts */
2079                 if (ulp_status != IOSTAT_LS_RJT ||
2080                     (((ulp_word4) >> 16 != LSRJT_INVALID_CMD) &&
2081                      ((ulp_word4) >> 16 != LSRJT_UNABLE_TPC)) ||
2082                     (phba)->pport->cfg_log_verbose & LOG_ELS)
2083                         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
2084                                          "2753 PLOGI failure DID:%06X "
2085                                          "Status:x%x/x%x\n",
2086                                          ndlp->nlp_DID, ulp_status,
2087                                          ulp_word4);
2088
2089                 /* Do not call DSM for lpfc_els_abort'ed ELS cmds */
2090                 if (!lpfc_error_lost_link(vport, ulp_status, ulp_word4))
2091                         lpfc_disc_state_machine(vport, ndlp, cmdiocb,
2092                                                 NLP_EVT_CMPL_PLOGI);
2093
2094                 /* If a PLOGI collision occurred, the node needs to continue
2095                  * with the reglogin process.
2096                  */
2097                 spin_lock_irq(&ndlp->lock);
2098                 if ((ndlp->nlp_flag & (NLP_ACC_REGLOGIN | NLP_RCV_PLOGI)) &&
2099                     ndlp->nlp_state == NLP_STE_REG_LOGIN_ISSUE) {
2100                         spin_unlock_irq(&ndlp->lock);
2101                         goto out;
2102                 }
2103
2104                 /* No PLOGI collision and the node is not registered with the
2105                  * scsi or nvme transport. It is no longer an active node. Just
2106                  * start the device remove process.
2107                  */
2108                 if (!(ndlp->fc4_xpt_flags & (SCSI_XPT_REGD | NVME_XPT_REGD))) {
2109                         ndlp->nlp_flag &= ~NLP_NPR_2B_DISC;
2110                         if (!(ndlp->nlp_flag & NLP_IN_DEV_LOSS))
2111                                 release_node = true;
2112                 }
2113                 spin_unlock_irq(&ndlp->lock);
2114
2115                 if (release_node)
2116                         lpfc_disc_state_machine(vport, ndlp, cmdiocb,
2117                                                 NLP_EVT_DEVICE_RM);
2118         } else {
2119                 /* Good status, call state machine */
2120                 prsp = list_entry(cmdiocb->cmd_dmabuf->list.next,
2121                                   struct lpfc_dmabuf, list);
2122                 ndlp = lpfc_plogi_confirm_nport(phba, prsp->virt, ndlp);
2123
2124                 sp = (struct serv_parm *)((u8 *)prsp->virt +
2125                                           sizeof(u32));
2126
2127                 ndlp->vmid_support = 0;
2128                 if ((phba->cfg_vmid_app_header && sp->cmn.app_hdr_support) ||
2129                     (phba->cfg_vmid_priority_tagging &&
2130                      sp->cmn.priority_tagging)) {
2131                         lpfc_printf_log(phba, KERN_DEBUG, LOG_ELS,
2132                                         "4018 app_hdr_support %d tagging %d DID x%x\n",
2133                                         sp->cmn.app_hdr_support,
2134                                         sp->cmn.priority_tagging,
2135                                         ndlp->nlp_DID);
2136                         /* if the dest port supports VMID, mark it in ndlp */
2137                         ndlp->vmid_support = 1;
2138                 }
2139
2140                 lpfc_disc_state_machine(vport, ndlp, cmdiocb,
2141                                         NLP_EVT_CMPL_PLOGI);
2142         }
2143
2144         if (disc && vport->num_disc_nodes) {
2145                 /* Check to see if there are more PLOGIs to be sent */
2146                 lpfc_more_plogi(vport);
2147
2148                 if (vport->num_disc_nodes == 0) {
2149                         spin_lock_irq(shost->host_lock);
2150                         vport->fc_flag &= ~FC_NDISC_ACTIVE;
2151                         spin_unlock_irq(shost->host_lock);
2152
2153                         lpfc_can_disctmo(vport);
2154                         lpfc_end_rscn(vport);
2155                 }
2156         }
2157
2158 out:
2159         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_NODE,
2160                               "PLOGI Cmpl PUT:     did:x%x refcnt %d",
2161                               ndlp->nlp_DID, kref_read(&ndlp->kref), 0);
2162
2163 out_freeiocb:
2164         /* Release the reference on the original I/O request. */
2165         free_ndlp = cmdiocb->ndlp;
2166
2167         lpfc_els_free_iocb(phba, cmdiocb);
2168         lpfc_nlp_put(free_ndlp);
2169         return;
2170 }
2171
2172 /**
2173  * lpfc_issue_els_plogi - Issue an plogi iocb command for a vport
2174  * @vport: pointer to a host virtual N_Port data structure.
2175  * @did: destination port identifier.
2176  * @retry: number of retries to the command IOCB.
2177  *
2178  * This routine issues a Port Login (PLOGI) command to a remote N_Port
2179  * (with the @did) for a @vport. Before issuing a PLOGI to a remote N_Port,
2180  * the ndlp with the remote N_Port DID must exist on the @vport's ndlp list.
2181  * This routine constructs the proper fields of the PLOGI IOCB and invokes
2182  * the lpfc_sli_issue_iocb() routine to send out PLOGI ELS command.
2183  *
2184  * Note that the ndlp reference count will be incremented by 1 for holding
2185  * the ndlp and the reference to ndlp will be stored into the ndlp field
2186  * of the IOCB for the completion callback function to the PLOGI ELS command.
2187  *
2188  * Return code
2189  *   0 - Successfully issued a plogi for @vport
2190  *   1 - failed to issue a plogi for @vport
2191  **/
2192 int
2193 lpfc_issue_els_plogi(struct lpfc_vport *vport, uint32_t did, uint8_t retry)
2194 {
2195         struct lpfc_hba  *phba = vport->phba;
2196         struct serv_parm *sp;
2197         struct lpfc_nodelist *ndlp;
2198         struct lpfc_iocbq *elsiocb;
2199         uint8_t *pcmd;
2200         uint16_t cmdsize;
2201         int ret;
2202
2203         ndlp = lpfc_findnode_did(vport, did);
2204         if (!ndlp)
2205                 return 1;
2206
2207         /* Defer the processing of the issue PLOGI until after the
2208          * outstanding UNREG_RPI mbox command completes, unless we
2209          * are going offline. This logic does not apply for Fabric DIDs
2210          */
2211         if ((ndlp->nlp_flag & (NLP_IGNR_REG_CMPL | NLP_UNREG_INP)) &&
2212             ((ndlp->nlp_DID & Fabric_DID_MASK) != Fabric_DID_MASK) &&
2213             !(vport->fc_flag & FC_OFFLINE_MODE)) {
2214                 lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
2215                                  "4110 Issue PLOGI x%x deferred "
2216                                  "on NPort x%x rpi x%x flg x%x Data:"
2217                                  " x%px\n",
2218                                  ndlp->nlp_defer_did, ndlp->nlp_DID,
2219                                  ndlp->nlp_rpi, ndlp->nlp_flag, ndlp);
2220
2221                 /* We can only defer 1st PLOGI */
2222                 if (ndlp->nlp_defer_did == NLP_EVT_NOTHING_PENDING)
2223                         ndlp->nlp_defer_did = did;
2224                 return 0;
2225         }
2226
2227         cmdsize = (sizeof(uint32_t) + sizeof(struct serv_parm));
2228         elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, retry, ndlp, did,
2229                                      ELS_CMD_PLOGI);
2230         if (!elsiocb)
2231                 return 1;
2232
2233         pcmd = (uint8_t *)elsiocb->cmd_dmabuf->virt;
2234
2235         /* For PLOGI request, remainder of payload is service parameters */
2236         *((uint32_t *) (pcmd)) = ELS_CMD_PLOGI;
2237         pcmd += sizeof(uint32_t);
2238         memcpy(pcmd, &vport->fc_sparam, sizeof(struct serv_parm));
2239         sp = (struct serv_parm *) pcmd;
2240
2241         /*
2242          * If we are a N-port connected to a Fabric, fix-up paramm's so logins
2243          * to device on remote loops work.
2244          */
2245         if ((vport->fc_flag & FC_FABRIC) && !(vport->fc_flag & FC_PUBLIC_LOOP))
2246                 sp->cmn.altBbCredit = 1;
2247
2248         if (sp->cmn.fcphLow < FC_PH_4_3)
2249                 sp->cmn.fcphLow = FC_PH_4_3;
2250
2251         if (sp->cmn.fcphHigh < FC_PH3)
2252                 sp->cmn.fcphHigh = FC_PH3;
2253
2254         sp->cmn.valid_vendor_ver_level = 0;
2255         memset(sp->un.vendorVersion, 0, sizeof(sp->un.vendorVersion));
2256         sp->cmn.bbRcvSizeMsb &= 0xF;
2257
2258         /* Check if the destination port supports VMID */
2259         ndlp->vmid_support = 0;
2260         if (vport->vmid_priority_tagging)
2261                 sp->cmn.priority_tagging = 1;
2262         else if (phba->cfg_vmid_app_header &&
2263                  bf_get(lpfc_ftr_ashdr, &phba->sli4_hba.sli4_flags))
2264                 sp->cmn.app_hdr_support = 1;
2265
2266         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
2267                 "Issue PLOGI:     did:x%x",
2268                 did, 0, 0);
2269
2270         /* If our firmware supports this feature, convey that
2271          * information to the target using the vendor specific field.
2272          */
2273         if (phba->sli.sli_flag & LPFC_SLI_SUPPRESS_RSP) {
2274                 sp->cmn.valid_vendor_ver_level = 1;
2275                 sp->un.vv.vid = cpu_to_be32(LPFC_VV_EMLX_ID);
2276                 sp->un.vv.flags = cpu_to_be32(LPFC_VV_SUPPRESS_RSP);
2277         }
2278
2279         phba->fc_stat.elsXmitPLOGI++;
2280         elsiocb->cmd_cmpl = lpfc_cmpl_els_plogi;
2281
2282         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
2283                               "Issue PLOGI:     did:x%x refcnt %d",
2284                               did, kref_read(&ndlp->kref), 0);
2285         elsiocb->ndlp = lpfc_nlp_get(ndlp);
2286         if (!elsiocb->ndlp) {
2287                 lpfc_els_free_iocb(phba, elsiocb);
2288                 return 1;
2289         }
2290
2291         ret = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
2292         if (ret) {
2293                 lpfc_els_free_iocb(phba, elsiocb);
2294                 lpfc_nlp_put(ndlp);
2295                 return 1;
2296         }
2297
2298         return 0;
2299 }
2300
2301 /**
2302  * lpfc_cmpl_els_prli - Completion callback function for prli
2303  * @phba: pointer to lpfc hba data structure.
2304  * @cmdiocb: pointer to lpfc command iocb data structure.
2305  * @rspiocb: pointer to lpfc response iocb data structure.
2306  *
2307  * This routine is the completion callback function for a Process Login
2308  * (PRLI) ELS command. The PRLI response IOCB status is checked for error
2309  * status. If there is error status reported, PRLI retry shall be attempted
2310  * by invoking the lpfc_els_retry() routine. Otherwise, the state
2311  * NLP_EVT_CMPL_PRLI is sent to the Discover State Machine (DSM) for this
2312  * ndlp to mark the PRLI completion.
2313  **/
2314 static void
2315 lpfc_cmpl_els_prli(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
2316                    struct lpfc_iocbq *rspiocb)
2317 {
2318         struct lpfc_vport *vport = cmdiocb->vport;
2319         struct lpfc_nodelist *ndlp;
2320         char *mode;
2321         u32 loglevel;
2322         u32 ulp_status;
2323         u32 ulp_word4;
2324         bool release_node = false;
2325
2326         /* we pass cmdiocb to state machine which needs rspiocb as well */
2327         cmdiocb->rsp_iocb = rspiocb;
2328
2329         ndlp = cmdiocb->ndlp;
2330
2331         ulp_status = get_job_ulpstatus(phba, rspiocb);
2332         ulp_word4 = get_job_word4(phba, rspiocb);
2333
2334         spin_lock_irq(&ndlp->lock);
2335         ndlp->nlp_flag &= ~NLP_PRLI_SND;
2336
2337         /* Driver supports multiple FC4 types.  Counters matter. */
2338         vport->fc_prli_sent--;
2339         ndlp->fc4_prli_sent--;
2340         spin_unlock_irq(&ndlp->lock);
2341
2342         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
2343                 "PRLI cmpl:       status:x%x/x%x did:x%x",
2344                 ulp_status, ulp_word4,
2345                 ndlp->nlp_DID);
2346
2347         /* PRLI completes to NPort <nlp_DID> */
2348         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
2349                          "0103 PRLI completes to NPort x%06x "
2350                          "Data: x%x x%x x%x x%x\n",
2351                          ndlp->nlp_DID, ulp_status, ulp_word4,
2352                          vport->num_disc_nodes, ndlp->fc4_prli_sent);
2353
2354         /* Check to see if link went down during discovery */
2355         if (lpfc_els_chk_latt(vport))
2356                 goto out;
2357
2358         if (ulp_status) {
2359                 /* Check for retry */
2360                 if (lpfc_els_retry(phba, cmdiocb, rspiocb)) {
2361                         /* ELS command is being retried */
2362                         goto out;
2363                 }
2364
2365                 /* If we don't send GFT_ID to Fabric, a PRLI error
2366                  * could be expected.
2367                  */
2368                 if ((vport->fc_flag & FC_FABRIC) ||
2369                     (vport->cfg_enable_fc4_type != LPFC_ENABLE_BOTH)) {
2370                         mode = KERN_ERR;
2371                         loglevel =  LOG_TRACE_EVENT;
2372                 } else {
2373                         mode = KERN_INFO;
2374                         loglevel =  LOG_ELS;
2375                 }
2376
2377                 /* PRLI failed */
2378                 lpfc_printf_vlog(vport, mode, loglevel,
2379                                  "2754 PRLI failure DID:%06X Status:x%x/x%x, "
2380                                  "data: x%x x%x\n",
2381                                  ndlp->nlp_DID, ulp_status,
2382                                  ulp_word4, ndlp->nlp_state,
2383                                  ndlp->fc4_prli_sent);
2384
2385                 /* Do not call DSM for lpfc_els_abort'ed ELS cmds */
2386                 if (!lpfc_error_lost_link(vport, ulp_status, ulp_word4))
2387                         lpfc_disc_state_machine(vport, ndlp, cmdiocb,
2388                                                 NLP_EVT_CMPL_PRLI);
2389
2390                 /* The following condition catches an inflight transition
2391                  * mismatch typically caused by an RSCN. Skip any
2392                  * processing to allow recovery.
2393                  */
2394                 if (ndlp->nlp_state >= NLP_STE_PLOGI_ISSUE &&
2395                     ndlp->nlp_state <= NLP_STE_REG_LOGIN_ISSUE) {
2396                         lpfc_printf_vlog(vport, KERN_WARNING, LOG_NODE,
2397                                          "2784 PRLI cmpl: state mismatch "
2398                                          "DID x%06x nstate x%x nflag x%x\n",
2399                                          ndlp->nlp_DID, ndlp->nlp_state,
2400                                          ndlp->nlp_flag);
2401                                 goto out;
2402                 }
2403
2404                 /*
2405                  * For P2P topology, retain the node so that PLOGI can be
2406                  * attempted on it again.
2407                  */
2408                 if (vport->fc_flag & FC_PT2PT)
2409                         goto out;
2410
2411                 /* As long as this node is not registered with the SCSI
2412                  * or NVMe transport and no other PRLIs are outstanding,
2413                  * it is no longer an active node.  Otherwise devloss
2414                  * handles the final cleanup.
2415                  */
2416                 spin_lock_irq(&ndlp->lock);
2417                 if (!(ndlp->fc4_xpt_flags & (SCSI_XPT_REGD | NVME_XPT_REGD)) &&
2418                     !ndlp->fc4_prli_sent) {
2419                         ndlp->nlp_flag &= ~NLP_NPR_2B_DISC;
2420                         if (!(ndlp->nlp_flag & NLP_IN_DEV_LOSS))
2421                                 release_node = true;
2422                 }
2423                 spin_unlock_irq(&ndlp->lock);
2424
2425                 if (release_node)
2426                         lpfc_disc_state_machine(vport, ndlp, cmdiocb,
2427                                                 NLP_EVT_DEVICE_RM);
2428         } else {
2429                 /* Good status, call state machine.  However, if another
2430                  * PRLI is outstanding, don't call the state machine
2431                  * because final disposition to Mapped or Unmapped is
2432                  * completed there.
2433                  */
2434                 lpfc_disc_state_machine(vport, ndlp, cmdiocb,
2435                                         NLP_EVT_CMPL_PRLI);
2436         }
2437
2438 out:
2439         lpfc_els_free_iocb(phba, cmdiocb);
2440         lpfc_nlp_put(ndlp);
2441         return;
2442 }
2443
2444 /**
2445  * lpfc_issue_els_prli - Issue a prli iocb command for a vport
2446  * @vport: pointer to a host virtual N_Port data structure.
2447  * @ndlp: pointer to a node-list data structure.
2448  * @retry: number of retries to the command IOCB.
2449  *
2450  * This routine issues a Process Login (PRLI) ELS command for the
2451  * @vport. The PRLI service parameters are set up in the payload of the
2452  * PRLI Request command and the pointer to lpfc_cmpl_els_prli() routine
2453  * is put to the IOCB completion callback func field before invoking the
2454  * routine lpfc_sli_issue_iocb() to send out PRLI command.
2455  *
2456  * Note that the ndlp reference count will be incremented by 1 for holding the
2457  * ndlp and the reference to ndlp will be stored into the ndlp field of
2458  * the IOCB for the completion callback function to the PRLI ELS command.
2459  *
2460  * Return code
2461  *   0 - successfully issued prli iocb command for @vport
2462  *   1 - failed to issue prli iocb command for @vport
2463  **/
2464 int
2465 lpfc_issue_els_prli(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
2466                     uint8_t retry)
2467 {
2468         int rc = 0;
2469         struct lpfc_hba *phba = vport->phba;
2470         PRLI *npr;
2471         struct lpfc_nvme_prli *npr_nvme;
2472         struct lpfc_iocbq *elsiocb;
2473         uint8_t *pcmd;
2474         uint16_t cmdsize;
2475         u32 local_nlp_type, elscmd;
2476
2477         /*
2478          * If we are in RSCN mode, the FC4 types supported from a
2479          * previous GFT_ID command may not be accurate. So, if we
2480          * are a NVME Initiator, always look for the possibility of
2481          * the remote NPort beng a NVME Target.
2482          */
2483         if (phba->sli_rev == LPFC_SLI_REV4 &&
2484             vport->fc_flag & FC_RSCN_MODE &&
2485             vport->nvmei_support)
2486                 ndlp->nlp_fc4_type |= NLP_FC4_NVME;
2487         local_nlp_type = ndlp->nlp_fc4_type;
2488
2489         /* This routine will issue 1 or 2 PRLIs, so zero all the ndlp
2490          * fields here before any of them can complete.
2491          */
2492         ndlp->nlp_type &= ~(NLP_FCP_TARGET | NLP_FCP_INITIATOR);
2493         ndlp->nlp_type &= ~(NLP_NVME_TARGET | NLP_NVME_INITIATOR);
2494         ndlp->nlp_fcp_info &= ~NLP_FCP_2_DEVICE;
2495         ndlp->nlp_flag &= ~(NLP_FIRSTBURST | NLP_NPR_2B_DISC);
2496         ndlp->nvme_fb_size = 0;
2497
2498  send_next_prli:
2499         if (local_nlp_type & NLP_FC4_FCP) {
2500                 /* Payload is 4 + 16 = 20 x14 bytes. */
2501                 cmdsize = (sizeof(uint32_t) + sizeof(PRLI));
2502                 elscmd = ELS_CMD_PRLI;
2503         } else if (local_nlp_type & NLP_FC4_NVME) {
2504                 /* Payload is 4 + 20 = 24 x18 bytes. */
2505                 cmdsize = (sizeof(uint32_t) + sizeof(struct lpfc_nvme_prli));
2506                 elscmd = ELS_CMD_NVMEPRLI;
2507         } else {
2508                 lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
2509                                  "3083 Unknown FC_TYPE x%x ndlp x%06x\n",
2510                                  ndlp->nlp_fc4_type, ndlp->nlp_DID);
2511                 return 1;
2512         }
2513
2514         /* SLI3 ports don't support NVME.  If this rport is a strict NVME
2515          * FC4 type, implicitly LOGO.
2516          */
2517         if (phba->sli_rev == LPFC_SLI_REV3 &&
2518             ndlp->nlp_fc4_type == NLP_FC4_NVME) {
2519                 lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
2520                                  "3088 Rport fc4 type 0x%x not supported by SLI3 adapter\n",
2521                                  ndlp->nlp_type);
2522                 lpfc_disc_state_machine(vport, ndlp, NULL, NLP_EVT_DEVICE_RM);
2523                 return 1;
2524         }
2525
2526         elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, retry, ndlp,
2527                                      ndlp->nlp_DID, elscmd);
2528         if (!elsiocb)
2529                 return 1;
2530
2531         pcmd = (uint8_t *)elsiocb->cmd_dmabuf->virt;
2532
2533         /* For PRLI request, remainder of payload is service parameters */
2534         memset(pcmd, 0, cmdsize);
2535
2536         if (local_nlp_type & NLP_FC4_FCP) {
2537                 /* Remainder of payload is FCP PRLI parameter page.
2538                  * Note: this data structure is defined as
2539                  * BE/LE in the structure definition so no
2540                  * byte swap call is made.
2541                  */
2542                 *((uint32_t *)(pcmd)) = ELS_CMD_PRLI;
2543                 pcmd += sizeof(uint32_t);
2544                 npr = (PRLI *)pcmd;
2545
2546                 /*
2547                  * If our firmware version is 3.20 or later,
2548                  * set the following bits for FC-TAPE support.
2549                  */
2550                 if (phba->vpd.rev.feaLevelHigh >= 0x02) {
2551                         npr->ConfmComplAllowed = 1;
2552                         npr->Retry = 1;
2553                         npr->TaskRetryIdReq = 1;
2554                 }
2555                 npr->estabImagePair = 1;
2556                 npr->readXferRdyDis = 1;
2557                 if (vport->cfg_first_burst_size)
2558                         npr->writeXferRdyDis = 1;
2559
2560                 /* For FCP support */
2561                 npr->prliType = PRLI_FCP_TYPE;
2562                 npr->initiatorFunc = 1;
2563                 elsiocb->cmd_flag |= LPFC_PRLI_FCP_REQ;
2564
2565                 /* Remove FCP type - processed. */
2566                 local_nlp_type &= ~NLP_FC4_FCP;
2567         } else if (local_nlp_type & NLP_FC4_NVME) {
2568                 /* Remainder of payload is NVME PRLI parameter page.
2569                  * This data structure is the newer definition that
2570                  * uses bf macros so a byte swap is required.
2571                  */
2572                 *((uint32_t *)(pcmd)) = ELS_CMD_NVMEPRLI;
2573                 pcmd += sizeof(uint32_t);
2574                 npr_nvme = (struct lpfc_nvme_prli *)pcmd;
2575                 bf_set(prli_type_code, npr_nvme, PRLI_NVME_TYPE);
2576                 bf_set(prli_estabImagePair, npr_nvme, 0);  /* Should be 0 */
2577                 if (phba->nsler) {
2578                         bf_set(prli_nsler, npr_nvme, 1);
2579                         bf_set(prli_conf, npr_nvme, 1);
2580                 }
2581
2582                 /* Only initiators request first burst. */
2583                 if ((phba->cfg_nvme_enable_fb) &&
2584                     !phba->nvmet_support)
2585                         bf_set(prli_fba, npr_nvme, 1);
2586
2587                 if (phba->nvmet_support) {
2588                         bf_set(prli_tgt, npr_nvme, 1);
2589                         bf_set(prli_disc, npr_nvme, 1);
2590                 } else {
2591                         bf_set(prli_init, npr_nvme, 1);
2592                         bf_set(prli_conf, npr_nvme, 1);
2593                 }
2594
2595                 npr_nvme->word1 = cpu_to_be32(npr_nvme->word1);
2596                 npr_nvme->word4 = cpu_to_be32(npr_nvme->word4);
2597                 elsiocb->cmd_flag |= LPFC_PRLI_NVME_REQ;
2598
2599                 /* Remove NVME type - processed. */
2600                 local_nlp_type &= ~NLP_FC4_NVME;
2601         }
2602
2603         phba->fc_stat.elsXmitPRLI++;
2604         elsiocb->cmd_cmpl = lpfc_cmpl_els_prli;
2605
2606         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
2607                               "Issue PRLI:  did:x%x refcnt %d",
2608                               ndlp->nlp_DID, kref_read(&ndlp->kref), 0);
2609         elsiocb->ndlp = lpfc_nlp_get(ndlp);
2610         if (!elsiocb->ndlp) {
2611                 lpfc_els_free_iocb(phba, elsiocb);
2612                 return 1;
2613         }
2614
2615         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
2616         if (rc == IOCB_ERROR) {
2617                 lpfc_els_free_iocb(phba, elsiocb);
2618                 lpfc_nlp_put(ndlp);
2619                 return 1;
2620         }
2621
2622         /* The vport counters are used for lpfc_scan_finished, but
2623          * the ndlp is used to track outstanding PRLIs for different
2624          * FC4 types.
2625          */
2626         spin_lock_irq(&ndlp->lock);
2627         ndlp->nlp_flag |= NLP_PRLI_SND;
2628         vport->fc_prli_sent++;
2629         ndlp->fc4_prli_sent++;
2630         spin_unlock_irq(&ndlp->lock);
2631
2632         /* The driver supports 2 FC4 types.  Make sure
2633          * a PRLI is issued for all types before exiting.
2634          */
2635         if (phba->sli_rev == LPFC_SLI_REV4 &&
2636             local_nlp_type & (NLP_FC4_FCP | NLP_FC4_NVME))
2637                 goto send_next_prli;
2638         else
2639                 return 0;
2640 }
2641
2642 /**
2643  * lpfc_rscn_disc - Perform rscn discovery for a vport
2644  * @vport: pointer to a host virtual N_Port data structure.
2645  *
2646  * This routine performs Registration State Change Notification (RSCN)
2647  * discovery for a @vport. If the @vport's node port recovery count is not
2648  * zero, it will invoke the lpfc_els_disc_plogi() to perform PLOGI for all
2649  * the nodes that need recovery. If none of the PLOGI were needed through
2650  * the lpfc_els_disc_plogi() routine, the lpfc_end_rscn() routine shall be
2651  * invoked to check and handle possible more RSCN came in during the period
2652  * of processing the current ones.
2653  **/
2654 static void
2655 lpfc_rscn_disc(struct lpfc_vport *vport)
2656 {
2657         lpfc_can_disctmo(vport);
2658
2659         /* RSCN discovery */
2660         /* go thru NPR nodes and issue ELS PLOGIs */
2661         if (vport->fc_npr_cnt)
2662                 if (lpfc_els_disc_plogi(vport))
2663                         return;
2664
2665         lpfc_end_rscn(vport);
2666 }
2667
2668 /**
2669  * lpfc_adisc_done - Complete the adisc phase of discovery
2670  * @vport: pointer to lpfc_vport hba data structure that finished all ADISCs.
2671  *
2672  * This function is called when the final ADISC is completed during discovery.
2673  * This function handles clearing link attention or issuing reg_vpi depending
2674  * on whether npiv is enabled. This function also kicks off the PLOGI phase of
2675  * discovery.
2676  * This function is called with no locks held.
2677  **/
2678 static void
2679 lpfc_adisc_done(struct lpfc_vport *vport)
2680 {
2681         struct Scsi_Host   *shost = lpfc_shost_from_vport(vport);
2682         struct lpfc_hba   *phba = vport->phba;
2683
2684         /*
2685          * For NPIV, cmpl_reg_vpi will set port_state to READY,
2686          * and continue discovery.
2687          */
2688         if ((phba->sli3_options & LPFC_SLI3_NPIV_ENABLED) &&
2689             !(vport->fc_flag & FC_RSCN_MODE) &&
2690             (phba->sli_rev < LPFC_SLI_REV4)) {
2691
2692                 /*
2693                  * If link is down, clear_la and reg_vpi will be done after
2694                  * flogi following a link up event
2695                  */
2696                 if (!lpfc_is_link_up(phba))
2697                         return;
2698
2699                 /* The ADISCs are complete.  Doesn't matter if they
2700                  * succeeded or failed because the ADISC completion
2701                  * routine guarantees to call the state machine and
2702                  * the RPI is either unregistered (failed ADISC response)
2703                  * or the RPI is still valid and the node is marked
2704                  * mapped for a target.  The exchanges should be in the
2705                  * correct state. This code is specific to SLI3.
2706                  */
2707                 lpfc_issue_clear_la(phba, vport);
2708                 lpfc_issue_reg_vpi(phba, vport);
2709                 return;
2710         }
2711         /*
2712         * For SLI2, we need to set port_state to READY
2713         * and continue discovery.
2714         */
2715         if (vport->port_state < LPFC_VPORT_READY) {
2716                 /* If we get here, there is nothing to ADISC */
2717                 lpfc_issue_clear_la(phba, vport);
2718                 if (!(vport->fc_flag & FC_ABORT_DISCOVERY)) {
2719                         vport->num_disc_nodes = 0;
2720                         /* go thru NPR list, issue ELS PLOGIs */
2721                         if (vport->fc_npr_cnt)
2722                                 lpfc_els_disc_plogi(vport);
2723                         if (!vport->num_disc_nodes) {
2724                                 spin_lock_irq(shost->host_lock);
2725                                 vport->fc_flag &= ~FC_NDISC_ACTIVE;
2726                                 spin_unlock_irq(shost->host_lock);
2727                                 lpfc_can_disctmo(vport);
2728                                 lpfc_end_rscn(vport);
2729                         }
2730                 }
2731                 vport->port_state = LPFC_VPORT_READY;
2732         } else
2733                 lpfc_rscn_disc(vport);
2734 }
2735
2736 /**
2737  * lpfc_more_adisc - Issue more adisc as needed
2738  * @vport: pointer to a host virtual N_Port data structure.
2739  *
2740  * This routine determines whether there are more ndlps on a @vport
2741  * node list need to have Address Discover (ADISC) issued. If so, it will
2742  * invoke the lpfc_els_disc_adisc() routine to issue ADISC on the @vport's
2743  * remaining nodes which need to have ADISC sent.
2744  **/
2745 void
2746 lpfc_more_adisc(struct lpfc_vport *vport)
2747 {
2748         if (vport->num_disc_nodes)
2749                 vport->num_disc_nodes--;
2750         /* Continue discovery with <num_disc_nodes> ADISCs to go */
2751         lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
2752                          "0210 Continue discovery with %d ADISCs to go "
2753                          "Data: x%x x%x x%x\n",
2754                          vport->num_disc_nodes, vport->fc_adisc_cnt,
2755                          vport->fc_flag, vport->port_state);
2756         /* Check to see if there are more ADISCs to be sent */
2757         if (vport->fc_flag & FC_NLP_MORE) {
2758                 lpfc_set_disctmo(vport);
2759                 /* go thru NPR nodes and issue any remaining ELS ADISCs */
2760                 lpfc_els_disc_adisc(vport);
2761         }
2762         if (!vport->num_disc_nodes)
2763                 lpfc_adisc_done(vport);
2764         return;
2765 }
2766
2767 /**
2768  * lpfc_cmpl_els_adisc - Completion callback function for adisc
2769  * @phba: pointer to lpfc hba data structure.
2770  * @cmdiocb: pointer to lpfc command iocb data structure.
2771  * @rspiocb: pointer to lpfc response iocb data structure.
2772  *
2773  * This routine is the completion function for issuing the Address Discover
2774  * (ADISC) command. It first checks to see whether link went down during
2775  * the discovery process. If so, the node will be marked as node port
2776  * recovery for issuing discover IOCB by the link attention handler and
2777  * exit. Otherwise, the response status is checked. If error was reported
2778  * in the response status, the ADISC command shall be retried by invoking
2779  * the lpfc_els_retry() routine. Otherwise, if no error was reported in
2780  * the response status, the state machine is invoked to set transition
2781  * with respect to NLP_EVT_CMPL_ADISC event.
2782  **/
2783 static void
2784 lpfc_cmpl_els_adisc(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
2785                     struct lpfc_iocbq *rspiocb)
2786 {
2787         struct lpfc_vport *vport = cmdiocb->vport;
2788         IOCB_t *irsp;
2789         struct lpfc_nodelist *ndlp;
2790         int  disc;
2791         u32 ulp_status, ulp_word4, tmo;
2792         bool release_node = false;
2793
2794         /* we pass cmdiocb to state machine which needs rspiocb as well */
2795         cmdiocb->rsp_iocb = rspiocb;
2796
2797         ndlp = cmdiocb->ndlp;
2798
2799         ulp_status = get_job_ulpstatus(phba, rspiocb);
2800         ulp_word4 = get_job_word4(phba, rspiocb);
2801
2802         if (phba->sli_rev == LPFC_SLI_REV4) {
2803                 tmo = get_wqe_tmo(cmdiocb);
2804         } else {
2805                 irsp = &rspiocb->iocb;
2806                 tmo = irsp->ulpTimeout;
2807         }
2808
2809         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
2810                 "ADISC cmpl:      status:x%x/x%x did:x%x",
2811                 ulp_status, ulp_word4,
2812                 ndlp->nlp_DID);
2813
2814         /* Since ndlp can be freed in the disc state machine, note if this node
2815          * is being used during discovery.
2816          */
2817         spin_lock_irq(&ndlp->lock);
2818         disc = (ndlp->nlp_flag & NLP_NPR_2B_DISC);
2819         ndlp->nlp_flag &= ~(NLP_ADISC_SND | NLP_NPR_2B_DISC);
2820         spin_unlock_irq(&ndlp->lock);
2821         /* ADISC completes to NPort <nlp_DID> */
2822         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
2823                          "0104 ADISC completes to NPort x%x "
2824                          "Data: x%x x%x x%x x%x x%x\n",
2825                          ndlp->nlp_DID, ulp_status, ulp_word4,
2826                          tmo, disc, vport->num_disc_nodes);
2827         /* Check to see if link went down during discovery */
2828         if (lpfc_els_chk_latt(vport)) {
2829                 spin_lock_irq(&ndlp->lock);
2830                 ndlp->nlp_flag |= NLP_NPR_2B_DISC;
2831                 spin_unlock_irq(&ndlp->lock);
2832                 goto out;
2833         }
2834
2835         if (ulp_status) {
2836                 /* Check for retry */
2837                 if (lpfc_els_retry(phba, cmdiocb, rspiocb)) {
2838                         /* ELS command is being retried */
2839                         if (disc) {
2840                                 spin_lock_irq(&ndlp->lock);
2841                                 ndlp->nlp_flag |= NLP_NPR_2B_DISC;
2842                                 spin_unlock_irq(&ndlp->lock);
2843                                 lpfc_set_disctmo(vport);
2844                         }
2845                         goto out;
2846                 }
2847                 /* ADISC failed */
2848                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
2849                                  "2755 ADISC failure DID:%06X Status:x%x/x%x\n",
2850                                  ndlp->nlp_DID, ulp_status,
2851                                  ulp_word4);
2852                 lpfc_disc_state_machine(vport, ndlp, cmdiocb,
2853                                         NLP_EVT_CMPL_ADISC);
2854
2855                 /* As long as this node is not registered with the SCSI or NVMe
2856                  * transport, it is no longer an active node. Otherwise
2857                  * devloss handles the final cleanup.
2858                  */
2859                 spin_lock_irq(&ndlp->lock);
2860                 if (!(ndlp->fc4_xpt_flags & (SCSI_XPT_REGD | NVME_XPT_REGD))) {
2861                         ndlp->nlp_flag &= ~NLP_NPR_2B_DISC;
2862                         if (!(ndlp->nlp_flag & NLP_IN_DEV_LOSS))
2863                                 release_node = true;
2864                 }
2865                 spin_unlock_irq(&ndlp->lock);
2866
2867                 if (release_node)
2868                         lpfc_disc_state_machine(vport, ndlp, cmdiocb,
2869                                                 NLP_EVT_DEVICE_RM);
2870         } else
2871                 /* Good status, call state machine */
2872                 lpfc_disc_state_machine(vport, ndlp, cmdiocb,
2873                                         NLP_EVT_CMPL_ADISC);
2874
2875         /* Check to see if there are more ADISCs to be sent */
2876         if (disc && vport->num_disc_nodes)
2877                 lpfc_more_adisc(vport);
2878 out:
2879         lpfc_els_free_iocb(phba, cmdiocb);
2880         lpfc_nlp_put(ndlp);
2881         return;
2882 }
2883
2884 /**
2885  * lpfc_issue_els_adisc - Issue an address discover iocb to an node on a vport
2886  * @vport: pointer to a virtual N_Port data structure.
2887  * @ndlp: pointer to a node-list data structure.
2888  * @retry: number of retries to the command IOCB.
2889  *
2890  * This routine issues an Address Discover (ADISC) for an @ndlp on a
2891  * @vport. It prepares the payload of the ADISC ELS command, updates the
2892  * and states of the ndlp, and invokes the lpfc_sli_issue_iocb() routine
2893  * to issue the ADISC ELS command.
2894  *
2895  * Note that the ndlp reference count will be incremented by 1 for holding the
2896  * ndlp and the reference to ndlp will be stored into the ndlp field of
2897  * the IOCB for the completion callback function to the ADISC ELS command.
2898  *
2899  * Return code
2900  *   0 - successfully issued adisc
2901  *   1 - failed to issue adisc
2902  **/
2903 int
2904 lpfc_issue_els_adisc(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
2905                      uint8_t retry)
2906 {
2907         int rc = 0;
2908         struct lpfc_hba  *phba = vport->phba;
2909         ADISC *ap;
2910         struct lpfc_iocbq *elsiocb;
2911         uint8_t *pcmd;
2912         uint16_t cmdsize;
2913
2914         cmdsize = (sizeof(uint32_t) + sizeof(ADISC));
2915         elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, retry, ndlp,
2916                                      ndlp->nlp_DID, ELS_CMD_ADISC);
2917         if (!elsiocb)
2918                 return 1;
2919
2920         pcmd = (uint8_t *)elsiocb->cmd_dmabuf->virt;
2921
2922         /* For ADISC request, remainder of payload is service parameters */
2923         *((uint32_t *) (pcmd)) = ELS_CMD_ADISC;
2924         pcmd += sizeof(uint32_t);
2925
2926         /* Fill in ADISC payload */
2927         ap = (ADISC *) pcmd;
2928         ap->hardAL_PA = phba->fc_pref_ALPA;
2929         memcpy(&ap->portName, &vport->fc_portname, sizeof(struct lpfc_name));
2930         memcpy(&ap->nodeName, &vport->fc_nodename, sizeof(struct lpfc_name));
2931         ap->DID = be32_to_cpu(vport->fc_myDID);
2932
2933         phba->fc_stat.elsXmitADISC++;
2934         elsiocb->cmd_cmpl = lpfc_cmpl_els_adisc;
2935         spin_lock_irq(&ndlp->lock);
2936         ndlp->nlp_flag |= NLP_ADISC_SND;
2937         spin_unlock_irq(&ndlp->lock);
2938         elsiocb->ndlp = lpfc_nlp_get(ndlp);
2939         if (!elsiocb->ndlp) {
2940                 lpfc_els_free_iocb(phba, elsiocb);
2941                 goto err;
2942         }
2943
2944         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
2945                               "Issue ADISC:   did:x%x refcnt %d",
2946                               ndlp->nlp_DID, kref_read(&ndlp->kref), 0);
2947
2948         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
2949         if (rc == IOCB_ERROR) {
2950                 lpfc_els_free_iocb(phba, elsiocb);
2951                 lpfc_nlp_put(ndlp);
2952                 goto err;
2953         }
2954
2955         return 0;
2956
2957 err:
2958         spin_lock_irq(&ndlp->lock);
2959         ndlp->nlp_flag &= ~NLP_ADISC_SND;
2960         spin_unlock_irq(&ndlp->lock);
2961         return 1;
2962 }
2963
2964 /**
2965  * lpfc_cmpl_els_logo - Completion callback function for logo
2966  * @phba: pointer to lpfc hba data structure.
2967  * @cmdiocb: pointer to lpfc command iocb data structure.
2968  * @rspiocb: pointer to lpfc response iocb data structure.
2969  *
2970  * This routine is the completion function for issuing the ELS Logout (LOGO)
2971  * command. If no error status was reported from the LOGO response, the
2972  * state machine of the associated ndlp shall be invoked for transition with
2973  * respect to NLP_EVT_CMPL_LOGO event.
2974  **/
2975 static void
2976 lpfc_cmpl_els_logo(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
2977                    struct lpfc_iocbq *rspiocb)
2978 {
2979         struct lpfc_nodelist *ndlp = cmdiocb->ndlp;
2980         struct lpfc_vport *vport = ndlp->vport;
2981         IOCB_t *irsp;
2982         unsigned long flags;
2983         uint32_t skip_recovery = 0;
2984         int wake_up_waiter = 0;
2985         u32 ulp_status;
2986         u32 ulp_word4;
2987         u32 tmo;
2988
2989         /* we pass cmdiocb to state machine which needs rspiocb as well */
2990         cmdiocb->rsp_iocb = rspiocb;
2991
2992         ulp_status = get_job_ulpstatus(phba, rspiocb);
2993         ulp_word4 = get_job_word4(phba, rspiocb);
2994
2995         if (phba->sli_rev == LPFC_SLI_REV4) {
2996                 tmo = get_wqe_tmo(cmdiocb);
2997         } else {
2998                 irsp = &rspiocb->iocb;
2999                 tmo = irsp->ulpTimeout;
3000         }
3001
3002         spin_lock_irq(&ndlp->lock);
3003         ndlp->nlp_flag &= ~NLP_LOGO_SND;
3004         if (ndlp->save_flags & NLP_WAIT_FOR_LOGO) {
3005                 wake_up_waiter = 1;
3006                 ndlp->save_flags &= ~NLP_WAIT_FOR_LOGO;
3007         }
3008         spin_unlock_irq(&ndlp->lock);
3009
3010         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
3011                 "LOGO cmpl:       status:x%x/x%x did:x%x",
3012                 ulp_status, ulp_word4,
3013                 ndlp->nlp_DID);
3014
3015         /* LOGO completes to NPort <nlp_DID> */
3016         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
3017                          "0105 LOGO completes to NPort x%x "
3018                          "refcnt %d nflags x%x Data: x%x x%x x%x x%x\n",
3019                          ndlp->nlp_DID, kref_read(&ndlp->kref), ndlp->nlp_flag,
3020                          ulp_status, ulp_word4,
3021                          tmo, vport->num_disc_nodes);
3022
3023         if (lpfc_els_chk_latt(vport)) {
3024                 skip_recovery = 1;
3025                 goto out;
3026         }
3027
3028         /* The LOGO will not be retried on failure.  A LOGO was
3029          * issued to the remote rport and a ACC or RJT or no Answer are
3030          * all acceptable.  Note the failure and move forward with
3031          * discovery.  The PLOGI will retry.
3032          */
3033         if (ulp_status) {
3034                 /* LOGO failed */
3035                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
3036                                  "2756 LOGO failure, No Retry DID:%06X "
3037                                  "Status:x%x/x%x\n",
3038                                  ndlp->nlp_DID, ulp_status,
3039                                  ulp_word4);
3040
3041                 if (lpfc_error_lost_link(vport, ulp_status, ulp_word4))
3042                         skip_recovery = 1;
3043         }
3044
3045         /* Call state machine. This will unregister the rpi if needed. */
3046         lpfc_disc_state_machine(vport, ndlp, cmdiocb, NLP_EVT_CMPL_LOGO);
3047
3048         if (skip_recovery)
3049                 goto out;
3050
3051         /* The driver sets this flag for an NPIV instance that doesn't want to
3052          * log into the remote port.
3053          */
3054         if (ndlp->nlp_flag & NLP_TARGET_REMOVE) {
3055                 spin_lock_irq(&ndlp->lock);
3056                 if (phba->sli_rev == LPFC_SLI_REV4)
3057                         ndlp->nlp_flag |= NLP_RELEASE_RPI;
3058                 ndlp->nlp_flag &= ~NLP_NPR_2B_DISC;
3059                 spin_unlock_irq(&ndlp->lock);
3060                 lpfc_disc_state_machine(vport, ndlp, cmdiocb,
3061                                         NLP_EVT_DEVICE_RM);
3062                 goto out_rsrc_free;
3063         }
3064
3065 out:
3066         /* At this point, the LOGO processing is complete. NOTE: For a
3067          * pt2pt topology, we are assuming the NPortID will only change
3068          * on link up processing. For a LOGO / PLOGI initiated by the
3069          * Initiator, we are assuming the NPortID is not going to change.
3070          */
3071
3072         if (wake_up_waiter && ndlp->logo_waitq)
3073                 wake_up(ndlp->logo_waitq);
3074         /*
3075          * If the node is a target, the handling attempts to recover the port.
3076          * For any other port type, the rpi is unregistered as an implicit
3077          * LOGO.
3078          */
3079         if (ndlp->nlp_type & (NLP_FCP_TARGET | NLP_NVME_TARGET) &&
3080             skip_recovery == 0) {
3081                 lpfc_cancel_retry_delay_tmo(vport, ndlp);
3082                 spin_lock_irqsave(&ndlp->lock, flags);
3083                 ndlp->nlp_flag |= NLP_NPR_2B_DISC;
3084                 spin_unlock_irqrestore(&ndlp->lock, flags);
3085
3086                 lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
3087                                  "3187 LOGO completes to NPort x%x: Start "
3088                                  "Recovery Data: x%x x%x x%x x%x\n",
3089                                  ndlp->nlp_DID, ulp_status,
3090                                  ulp_word4, tmo,
3091                                  vport->num_disc_nodes);
3092
3093                 lpfc_els_free_iocb(phba, cmdiocb);
3094                 lpfc_nlp_put(ndlp);
3095
3096                 lpfc_disc_start(vport);
3097                 return;
3098         }
3099
3100         /* Cleanup path for failed REG_RPI handling. If REG_RPI fails, the
3101          * driver sends a LOGO to the rport to cleanup.  For fabric and
3102          * initiator ports cleanup the node as long as it the node is not
3103          * register with the transport.
3104          */
3105         if (!(ndlp->fc4_xpt_flags & (SCSI_XPT_REGD | NVME_XPT_REGD))) {
3106                 spin_lock_irq(&ndlp->lock);
3107                 ndlp->nlp_flag &= ~NLP_NPR_2B_DISC;
3108                 spin_unlock_irq(&ndlp->lock);
3109                 lpfc_disc_state_machine(vport, ndlp, cmdiocb,
3110                                         NLP_EVT_DEVICE_RM);
3111         }
3112 out_rsrc_free:
3113         /* Driver is done with the I/O. */
3114         lpfc_els_free_iocb(phba, cmdiocb);
3115         lpfc_nlp_put(ndlp);
3116 }
3117
3118 /**
3119  * lpfc_issue_els_logo - Issue a logo to an node on a vport
3120  * @vport: pointer to a virtual N_Port data structure.
3121  * @ndlp: pointer to a node-list data structure.
3122  * @retry: number of retries to the command IOCB.
3123  *
3124  * This routine constructs and issues an ELS Logout (LOGO) iocb command
3125  * to a remote node, referred by an @ndlp on a @vport. It constructs the
3126  * payload of the IOCB, properly sets up the @ndlp state, and invokes the
3127  * lpfc_sli_issue_iocb() routine to send out the LOGO ELS command.
3128  *
3129  * Note that the ndlp reference count will be incremented by 1 for holding the
3130  * ndlp and the reference to ndlp will be stored into the ndlp field of
3131  * the IOCB for the completion callback function to the LOGO ELS command.
3132  *
3133  * Callers of this routine are expected to unregister the RPI first
3134  *
3135  * Return code
3136  *   0 - successfully issued logo
3137  *   1 - failed to issue logo
3138  **/
3139 int
3140 lpfc_issue_els_logo(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
3141                     uint8_t retry)
3142 {
3143         struct lpfc_hba  *phba = vport->phba;
3144         struct lpfc_iocbq *elsiocb;
3145         uint8_t *pcmd;
3146         uint16_t cmdsize;
3147         int rc;
3148
3149         spin_lock_irq(&ndlp->lock);
3150         if (ndlp->nlp_flag & NLP_LOGO_SND) {
3151                 spin_unlock_irq(&ndlp->lock);
3152                 return 0;
3153         }
3154         spin_unlock_irq(&ndlp->lock);
3155
3156         cmdsize = (2 * sizeof(uint32_t)) + sizeof(struct lpfc_name);
3157         elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, retry, ndlp,
3158                                      ndlp->nlp_DID, ELS_CMD_LOGO);
3159         if (!elsiocb)
3160                 return 1;
3161
3162         pcmd = (uint8_t *)elsiocb->cmd_dmabuf->virt;
3163         *((uint32_t *) (pcmd)) = ELS_CMD_LOGO;
3164         pcmd += sizeof(uint32_t);
3165
3166         /* Fill in LOGO payload */
3167         *((uint32_t *) (pcmd)) = be32_to_cpu(vport->fc_myDID);
3168         pcmd += sizeof(uint32_t);
3169         memcpy(pcmd, &vport->fc_portname, sizeof(struct lpfc_name));
3170
3171         phba->fc_stat.elsXmitLOGO++;
3172         elsiocb->cmd_cmpl = lpfc_cmpl_els_logo;
3173         spin_lock_irq(&ndlp->lock);
3174         ndlp->nlp_flag |= NLP_LOGO_SND;
3175         ndlp->nlp_flag &= ~NLP_ISSUE_LOGO;
3176         spin_unlock_irq(&ndlp->lock);
3177         elsiocb->ndlp = lpfc_nlp_get(ndlp);
3178         if (!elsiocb->ndlp) {
3179                 lpfc_els_free_iocb(phba, elsiocb);
3180                 goto err;
3181         }
3182
3183         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
3184                               "Issue LOGO:      did:x%x refcnt %d",
3185                               ndlp->nlp_DID, kref_read(&ndlp->kref), 0);
3186
3187         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
3188         if (rc == IOCB_ERROR) {
3189                 lpfc_els_free_iocb(phba, elsiocb);
3190                 lpfc_nlp_put(ndlp);
3191                 goto err;
3192         }
3193
3194         spin_lock_irq(&ndlp->lock);
3195         ndlp->nlp_prev_state = ndlp->nlp_state;
3196         spin_unlock_irq(&ndlp->lock);
3197         lpfc_nlp_set_state(vport, ndlp, NLP_STE_LOGO_ISSUE);
3198         return 0;
3199
3200 err:
3201         spin_lock_irq(&ndlp->lock);
3202         ndlp->nlp_flag &= ~NLP_LOGO_SND;
3203         spin_unlock_irq(&ndlp->lock);
3204         return 1;
3205 }
3206
3207 /**
3208  * lpfc_cmpl_els_cmd - Completion callback function for generic els command
3209  * @phba: pointer to lpfc hba data structure.
3210  * @cmdiocb: pointer to lpfc command iocb data structure.
3211  * @rspiocb: pointer to lpfc response iocb data structure.
3212  *
3213  * This routine is a generic completion callback function for ELS commands.
3214  * Specifically, it is the callback function which does not need to perform
3215  * any command specific operations. It is currently used by the ELS command
3216  * issuing routines for RSCN, lpfc_issue_els_rscn, and the ELS Fibre Channel
3217  * Address Resolution Protocol Response (FARPR) routine, lpfc_issue_els_farpr().
3218  * Other than certain debug loggings, this callback function simply invokes the
3219  * lpfc_els_chk_latt() routine to check whether link went down during the
3220  * discovery process.
3221  **/
3222 static void
3223 lpfc_cmpl_els_cmd(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
3224                   struct lpfc_iocbq *rspiocb)
3225 {
3226         struct lpfc_vport *vport = cmdiocb->vport;
3227         struct lpfc_nodelist *free_ndlp;
3228         IOCB_t *irsp;
3229         u32 ulp_status, ulp_word4, tmo, did, iotag;
3230
3231         ulp_status = get_job_ulpstatus(phba, rspiocb);
3232         ulp_word4 = get_job_word4(phba, rspiocb);
3233         did = get_job_els_rsp64_did(phba, cmdiocb);
3234
3235         if (phba->sli_rev == LPFC_SLI_REV4) {
3236                 tmo = get_wqe_tmo(cmdiocb);
3237                 iotag = get_wqe_reqtag(cmdiocb);
3238         } else {
3239                 irsp = &rspiocb->iocb;
3240                 tmo = irsp->ulpTimeout;
3241                 iotag = irsp->ulpIoTag;
3242         }
3243
3244         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
3245                               "ELS cmd cmpl:    status:x%x/x%x did:x%x",
3246                               ulp_status, ulp_word4, did);
3247
3248         /* ELS cmd tag <ulpIoTag> completes */
3249         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
3250                          "0106 ELS cmd tag x%x completes Data: x%x x%x x%x\n",
3251                          iotag, ulp_status, ulp_word4, tmo);
3252
3253         /* Check to see if link went down during discovery */
3254         lpfc_els_chk_latt(vport);
3255
3256         free_ndlp = cmdiocb->ndlp;
3257
3258         lpfc_els_free_iocb(phba, cmdiocb);
3259         lpfc_nlp_put(free_ndlp);
3260 }
3261
3262 /**
3263  * lpfc_reg_fab_ctrl_node - RPI register the fabric controller node.
3264  * @vport: pointer to lpfc_vport data structure.
3265  * @fc_ndlp: pointer to the fabric controller (0xfffffd) node.
3266  *
3267  * This routine registers the rpi assigned to the fabric controller
3268  * NPort_ID (0xfffffd) with the port and moves the node to UNMAPPED
3269  * state triggering a registration with the SCSI transport.
3270  *
3271  * This routine is single out because the fabric controller node
3272  * does not receive a PLOGI.  This routine is consumed by the
3273  * SCR and RDF ELS commands.  Callers are expected to qualify
3274  * with SLI4 first.
3275  **/
3276 static int
3277 lpfc_reg_fab_ctrl_node(struct lpfc_vport *vport, struct lpfc_nodelist *fc_ndlp)
3278 {
3279         int rc = 0;
3280         struct lpfc_hba *phba = vport->phba;
3281         struct lpfc_nodelist *ns_ndlp;
3282         LPFC_MBOXQ_t *mbox;
3283
3284         if (fc_ndlp->nlp_flag & NLP_RPI_REGISTERED)
3285                 return rc;
3286
3287         ns_ndlp = lpfc_findnode_did(vport, NameServer_DID);
3288         if (!ns_ndlp)
3289                 return -ENODEV;
3290
3291         lpfc_printf_vlog(vport, KERN_INFO, LOG_NODE,
3292                          "0935 %s: Reg FC RPI x%x on FC DID x%x NSSte: x%x\n",
3293                          __func__, fc_ndlp->nlp_rpi, fc_ndlp->nlp_DID,
3294                          ns_ndlp->nlp_state);
3295         if (ns_ndlp->nlp_state != NLP_STE_UNMAPPED_NODE)
3296                 return -ENODEV;
3297
3298         mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
3299         if (!mbox) {
3300                 lpfc_printf_vlog(vport, KERN_ERR, LOG_NODE,
3301                                  "0936 %s: no memory for reg_login "
3302                                  "Data: x%x x%x x%x x%x\n", __func__,
3303                                  fc_ndlp->nlp_DID, fc_ndlp->nlp_state,
3304                                  fc_ndlp->nlp_flag, fc_ndlp->nlp_rpi);
3305                 return -ENOMEM;
3306         }
3307         rc = lpfc_reg_rpi(phba, vport->vpi, fc_ndlp->nlp_DID,
3308                           (u8 *)&vport->fc_sparam, mbox, fc_ndlp->nlp_rpi);
3309         if (rc) {
3310                 rc = -EACCES;
3311                 goto out;
3312         }
3313
3314         fc_ndlp->nlp_flag |= NLP_REG_LOGIN_SEND;
3315         mbox->mbox_cmpl = lpfc_mbx_cmpl_fc_reg_login;
3316         mbox->ctx_ndlp = lpfc_nlp_get(fc_ndlp);
3317         if (!mbox->ctx_ndlp) {
3318                 rc = -ENOMEM;
3319                 goto out;
3320         }
3321
3322         mbox->vport = vport;
3323         rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
3324         if (rc == MBX_NOT_FINISHED) {
3325                 rc = -ENODEV;
3326                 lpfc_nlp_put(fc_ndlp);
3327                 goto out;
3328         }
3329         /* Success path. Exit. */
3330         lpfc_nlp_set_state(vport, fc_ndlp,
3331                            NLP_STE_REG_LOGIN_ISSUE);
3332         return 0;
3333
3334  out:
3335         lpfc_mbox_rsrc_cleanup(phba, mbox, MBOX_THD_UNLOCKED);
3336         lpfc_printf_vlog(vport, KERN_ERR, LOG_NODE,
3337                          "0938 %s: failed to format reg_login "
3338                          "Data: x%x x%x x%x x%x\n", __func__,
3339                          fc_ndlp->nlp_DID, fc_ndlp->nlp_state,
3340                          fc_ndlp->nlp_flag, fc_ndlp->nlp_rpi);
3341         return rc;
3342 }
3343
3344 /**
3345  * lpfc_cmpl_els_disc_cmd - Completion callback function for Discovery ELS cmd
3346  * @phba: pointer to lpfc hba data structure.
3347  * @cmdiocb: pointer to lpfc command iocb data structure.
3348  * @rspiocb: pointer to lpfc response iocb data structure.
3349  *
3350  * This routine is a generic completion callback function for Discovery ELS cmd.
3351  * Currently used by the ELS command issuing routines for the ELS State Change
3352  * Request (SCR), lpfc_issue_els_scr() and the ELS RDF, lpfc_issue_els_rdf().
3353  * These commands will be retried once only for ELS timeout errors.
3354  **/
3355 static void
3356 lpfc_cmpl_els_disc_cmd(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
3357                        struct lpfc_iocbq *rspiocb)
3358 {
3359         struct lpfc_vport *vport = cmdiocb->vport;
3360         IOCB_t *irsp;
3361         struct lpfc_els_rdf_rsp *prdf;
3362         struct lpfc_dmabuf *pcmd, *prsp;
3363         u32 *pdata;
3364         u32 cmd;
3365         struct lpfc_nodelist *ndlp = cmdiocb->ndlp;
3366         u32 ulp_status, ulp_word4, tmo, did, iotag;
3367
3368         ulp_status = get_job_ulpstatus(phba, rspiocb);
3369         ulp_word4 = get_job_word4(phba, rspiocb);
3370         did = get_job_els_rsp64_did(phba, cmdiocb);
3371
3372         if (phba->sli_rev == LPFC_SLI_REV4) {
3373                 tmo = get_wqe_tmo(cmdiocb);
3374                 iotag = get_wqe_reqtag(cmdiocb);
3375         } else {
3376                 irsp = &rspiocb->iocb;
3377                 tmo = irsp->ulpTimeout;
3378                 iotag = irsp->ulpIoTag;
3379         }
3380
3381         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
3382                 "ELS cmd cmpl:    status:x%x/x%x did:x%x",
3383                 ulp_status, ulp_word4, did);
3384
3385         /* ELS cmd tag <ulpIoTag> completes */
3386         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS | LOG_CGN_MGMT,
3387                          "0217 ELS cmd tag x%x completes Data: x%x x%x x%x x%x\n",
3388                          iotag, ulp_status, ulp_word4, tmo, cmdiocb->retry);
3389
3390         pcmd = cmdiocb->cmd_dmabuf;
3391         if (!pcmd)
3392                 goto out;
3393
3394         pdata = (u32 *)pcmd->virt;
3395         if (!pdata)
3396                 goto out;
3397         cmd = *pdata;
3398
3399         /* Only 1 retry for ELS Timeout only */
3400         if (ulp_status == IOSTAT_LOCAL_REJECT &&
3401             ((ulp_word4 & IOERR_PARAM_MASK) ==
3402             IOERR_SEQUENCE_TIMEOUT)) {
3403                 cmdiocb->retry++;
3404                 if (cmdiocb->retry <= 1) {
3405                         switch (cmd) {
3406                         case ELS_CMD_SCR:
3407                                 lpfc_issue_els_scr(vport, cmdiocb->retry);
3408                                 break;
3409                         case ELS_CMD_EDC:
3410                                 lpfc_issue_els_edc(vport, cmdiocb->retry);
3411                                 break;
3412                         case ELS_CMD_RDF:
3413                                 lpfc_issue_els_rdf(vport, cmdiocb->retry);
3414                                 break;
3415                         }
3416                         goto out;
3417                 }
3418                 phba->fc_stat.elsRetryExceeded++;
3419         }
3420         if (cmd == ELS_CMD_EDC) {
3421                 /* must be called before checking uplStatus and returning */
3422                 lpfc_cmpl_els_edc(phba, cmdiocb, rspiocb);
3423                 return;
3424         }
3425         if (ulp_status) {
3426                 /* ELS discovery cmd completes with error */
3427                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_ELS | LOG_CGN_MGMT,
3428                                  "4203 ELS cmd x%x error: x%x x%X\n", cmd,
3429                                  ulp_status, ulp_word4);
3430                 goto out;
3431         }
3432
3433         /* The RDF response doesn't have any impact on the running driver
3434          * but the notification descriptors are dumped here for support.
3435          */
3436         if (cmd == ELS_CMD_RDF) {
3437                 int i;
3438
3439                 prsp = list_get_first(&pcmd->list, struct lpfc_dmabuf, list);
3440                 if (!prsp)
3441                         goto out;
3442
3443                 prdf = (struct lpfc_els_rdf_rsp *)prsp->virt;
3444                 if (!prdf)
3445                         goto out;
3446
3447                 for (i = 0; i < ELS_RDF_REG_TAG_CNT &&
3448                             i < be32_to_cpu(prdf->reg_d1.reg_desc.count); i++)
3449                         lpfc_printf_vlog(vport, KERN_INFO,
3450                                          LOG_ELS | LOG_CGN_MGMT,
3451                                          "4677 Fabric RDF Notification Grant "
3452                                          "Data: 0x%08x Reg: %x %x\n",
3453                                          be32_to_cpu(
3454                                                  prdf->reg_d1.desc_tags[i]),
3455                                          phba->cgn_reg_signal,
3456                                          phba->cgn_reg_fpin);
3457         }
3458
3459 out:
3460         /* Check to see if link went down during discovery */
3461         lpfc_els_chk_latt(vport);
3462         lpfc_els_free_iocb(phba, cmdiocb);
3463         lpfc_nlp_put(ndlp);
3464         return;
3465 }
3466
3467 /**
3468  * lpfc_issue_els_scr - Issue a scr to an node on a vport
3469  * @vport: pointer to a host virtual N_Port data structure.
3470  * @retry: retry counter for the command IOCB.
3471  *
3472  * This routine issues a State Change Request (SCR) to a fabric node
3473  * on a @vport. The remote node is Fabric Controller (0xfffffd). It
3474  * first search the @vport node list to find the matching ndlp. If no such
3475  * ndlp is found, a new ndlp shall be created for this (SCR) purpose. An
3476  * IOCB is allocated, payload prepared, and the lpfc_sli_issue_iocb()
3477  * routine is invoked to send the SCR IOCB.
3478  *
3479  * Note that the ndlp reference count will be incremented by 1 for holding the
3480  * ndlp and the reference to ndlp will be stored into the ndlp field of
3481  * the IOCB for the completion callback function to the SCR ELS command.
3482  *
3483  * Return code
3484  *   0 - Successfully issued scr command
3485  *   1 - Failed to issue scr command
3486  **/
3487 int
3488 lpfc_issue_els_scr(struct lpfc_vport *vport, uint8_t retry)
3489 {
3490         int rc = 0;
3491         struct lpfc_hba  *phba = vport->phba;
3492         struct lpfc_iocbq *elsiocb;
3493         uint8_t *pcmd;
3494         uint16_t cmdsize;
3495         struct lpfc_nodelist *ndlp;
3496
3497         cmdsize = (sizeof(uint32_t) + sizeof(SCR));
3498
3499         ndlp = lpfc_findnode_did(vport, Fabric_Cntl_DID);
3500         if (!ndlp) {
3501                 ndlp = lpfc_nlp_init(vport, Fabric_Cntl_DID);
3502                 if (!ndlp)
3503                         return 1;
3504                 lpfc_enqueue_node(vport, ndlp);
3505         }
3506
3507         elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, retry, ndlp,
3508                                      ndlp->nlp_DID, ELS_CMD_SCR);
3509         if (!elsiocb)
3510                 return 1;
3511
3512         if (phba->sli_rev == LPFC_SLI_REV4) {
3513                 rc = lpfc_reg_fab_ctrl_node(vport, ndlp);
3514                 if (rc) {
3515                         lpfc_els_free_iocb(phba, elsiocb);
3516                         lpfc_printf_vlog(vport, KERN_ERR, LOG_NODE,
3517                                          "0937 %s: Failed to reg fc node, rc %d\n",
3518                                          __func__, rc);
3519                         return 1;
3520                 }
3521         }
3522         pcmd = (uint8_t *)elsiocb->cmd_dmabuf->virt;
3523
3524         *((uint32_t *) (pcmd)) = ELS_CMD_SCR;
3525         pcmd += sizeof(uint32_t);
3526
3527         /* For SCR, remainder of payload is SCR parameter page */
3528         memset(pcmd, 0, sizeof(SCR));
3529         ((SCR *) pcmd)->Function = SCR_FUNC_FULL;
3530
3531         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
3532                 "Issue SCR:       did:x%x",
3533                 ndlp->nlp_DID, 0, 0);
3534
3535         phba->fc_stat.elsXmitSCR++;
3536         elsiocb->cmd_cmpl = lpfc_cmpl_els_disc_cmd;
3537         elsiocb->ndlp = lpfc_nlp_get(ndlp);
3538         if (!elsiocb->ndlp) {
3539                 lpfc_els_free_iocb(phba, elsiocb);
3540                 return 1;
3541         }
3542
3543         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
3544                               "Issue SCR:     did:x%x refcnt %d",
3545                               ndlp->nlp_DID, kref_read(&ndlp->kref), 0);
3546
3547         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
3548         if (rc == IOCB_ERROR) {
3549                 lpfc_els_free_iocb(phba, elsiocb);
3550                 lpfc_nlp_put(ndlp);
3551                 return 1;
3552         }
3553
3554         return 0;
3555 }
3556
3557 /**
3558  * lpfc_issue_els_rscn - Issue an RSCN to the Fabric Controller (Fabric)
3559  *   or the other nport (pt2pt).
3560  * @vport: pointer to a host virtual N_Port data structure.
3561  * @retry: number of retries to the command IOCB.
3562  *
3563  * This routine issues a RSCN to the Fabric Controller (DID 0xFFFFFD)
3564  *  when connected to a fabric, or to the remote port when connected
3565  *  in point-to-point mode. When sent to the Fabric Controller, it will
3566  *  replay the RSCN to registered recipients.
3567  *
3568  * Note that the ndlp reference count will be incremented by 1 for holding the
3569  * ndlp and the reference to ndlp will be stored into the ndlp field of
3570  * the IOCB for the completion callback function to the RSCN ELS command.
3571  *
3572  * Return code
3573  *   0 - Successfully issued RSCN command
3574  *   1 - Failed to issue RSCN command
3575  **/
3576 int
3577 lpfc_issue_els_rscn(struct lpfc_vport *vport, uint8_t retry)
3578 {
3579         int rc = 0;
3580         struct lpfc_hba *phba = vport->phba;
3581         struct lpfc_iocbq *elsiocb;
3582         struct lpfc_nodelist *ndlp;
3583         struct {
3584                 struct fc_els_rscn rscn;
3585                 struct fc_els_rscn_page portid;
3586         } *event;
3587         uint32_t nportid;
3588         uint16_t cmdsize = sizeof(*event);
3589
3590         /* Not supported for private loop */
3591         if (phba->fc_topology == LPFC_TOPOLOGY_LOOP &&
3592             !(vport->fc_flag & FC_PUBLIC_LOOP))
3593                 return 1;
3594
3595         if (vport->fc_flag & FC_PT2PT) {
3596                 /* find any mapped nport - that would be the other nport */
3597                 ndlp = lpfc_findnode_mapped(vport);
3598                 if (!ndlp)
3599                         return 1;
3600         } else {
3601                 nportid = FC_FID_FCTRL;
3602                 /* find the fabric controller node */
3603                 ndlp = lpfc_findnode_did(vport, nportid);
3604                 if (!ndlp) {
3605                         /* if one didn't exist, make one */
3606                         ndlp = lpfc_nlp_init(vport, nportid);
3607                         if (!ndlp)
3608                                 return 1;
3609                         lpfc_enqueue_node(vport, ndlp);
3610                 }
3611         }
3612
3613         elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, retry, ndlp,
3614                                      ndlp->nlp_DID, ELS_CMD_RSCN_XMT);
3615
3616         if (!elsiocb)
3617                 return 1;
3618
3619         event = elsiocb->cmd_dmabuf->virt;
3620
3621         event->rscn.rscn_cmd = ELS_RSCN;
3622         event->rscn.rscn_page_len = sizeof(struct fc_els_rscn_page);
3623         event->rscn.rscn_plen = cpu_to_be16(cmdsize);
3624
3625         nportid = vport->fc_myDID;
3626         /* appears that page flags must be 0 for fabric to broadcast RSCN */
3627         event->portid.rscn_page_flags = 0;
3628         event->portid.rscn_fid[0] = (nportid & 0x00FF0000) >> 16;
3629         event->portid.rscn_fid[1] = (nportid & 0x0000FF00) >> 8;
3630         event->portid.rscn_fid[2] = nportid & 0x000000FF;
3631
3632         phba->fc_stat.elsXmitRSCN++;
3633         elsiocb->cmd_cmpl = lpfc_cmpl_els_cmd;
3634         elsiocb->ndlp = lpfc_nlp_get(ndlp);
3635         if (!elsiocb->ndlp) {
3636                 lpfc_els_free_iocb(phba, elsiocb);
3637                 return 1;
3638         }
3639
3640         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
3641                               "Issue RSCN:       did:x%x",
3642                               ndlp->nlp_DID, 0, 0);
3643
3644         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
3645         if (rc == IOCB_ERROR) {
3646                 lpfc_els_free_iocb(phba, elsiocb);
3647                 lpfc_nlp_put(ndlp);
3648                 return 1;
3649         }
3650
3651         return 0;
3652 }
3653
3654 /**
3655  * lpfc_issue_els_farpr - Issue a farp to an node on a vport
3656  * @vport: pointer to a host virtual N_Port data structure.
3657  * @nportid: N_Port identifier to the remote node.
3658  * @retry: number of retries to the command IOCB.
3659  *
3660  * This routine issues a Fibre Channel Address Resolution Response
3661  * (FARPR) to a node on a vport. The remote node N_Port identifier (@nportid)
3662  * is passed into the function. It first search the @vport node list to find
3663  * the matching ndlp. If no such ndlp is found, a new ndlp shall be created
3664  * for this (FARPR) purpose. An IOCB is allocated, payload prepared, and the
3665  * lpfc_sli_issue_iocb() routine is invoked to send the FARPR ELS command.
3666  *
3667  * Note that the ndlp reference count will be incremented by 1 for holding the
3668  * ndlp and the reference to ndlp will be stored into the ndlp field of
3669  * the IOCB for the completion callback function to the FARPR ELS command.
3670  *
3671  * Return code
3672  *   0 - Successfully issued farpr command
3673  *   1 - Failed to issue farpr command
3674  **/
3675 static int
3676 lpfc_issue_els_farpr(struct lpfc_vport *vport, uint32_t nportid, uint8_t retry)
3677 {
3678         int rc = 0;
3679         struct lpfc_hba  *phba = vport->phba;
3680         struct lpfc_iocbq *elsiocb;
3681         FARP *fp;
3682         uint8_t *pcmd;
3683         uint32_t *lp;
3684         uint16_t cmdsize;
3685         struct lpfc_nodelist *ondlp;
3686         struct lpfc_nodelist *ndlp;
3687
3688         cmdsize = (sizeof(uint32_t) + sizeof(FARP));
3689
3690         ndlp = lpfc_findnode_did(vport, nportid);
3691         if (!ndlp) {
3692                 ndlp = lpfc_nlp_init(vport, nportid);
3693                 if (!ndlp)
3694                         return 1;
3695                 lpfc_enqueue_node(vport, ndlp);
3696         }
3697
3698         elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, retry, ndlp,
3699                                      ndlp->nlp_DID, ELS_CMD_FARPR);
3700         if (!elsiocb)
3701                 return 1;
3702
3703         pcmd = (uint8_t *)elsiocb->cmd_dmabuf->virt;
3704
3705         *((uint32_t *) (pcmd)) = ELS_CMD_FARPR;
3706         pcmd += sizeof(uint32_t);
3707
3708         /* Fill in FARPR payload */
3709         fp = (FARP *) (pcmd);
3710         memset(fp, 0, sizeof(FARP));
3711         lp = (uint32_t *) pcmd;
3712         *lp++ = be32_to_cpu(nportid);
3713         *lp++ = be32_to_cpu(vport->fc_myDID);
3714         fp->Rflags = 0;
3715         fp->Mflags = (FARP_MATCH_PORT | FARP_MATCH_NODE);
3716
3717         memcpy(&fp->RportName, &vport->fc_portname, sizeof(struct lpfc_name));
3718         memcpy(&fp->RnodeName, &vport->fc_nodename, sizeof(struct lpfc_name));
3719         ondlp = lpfc_findnode_did(vport, nportid);
3720         if (ondlp) {
3721                 memcpy(&fp->OportName, &ondlp->nlp_portname,
3722                        sizeof(struct lpfc_name));
3723                 memcpy(&fp->OnodeName, &ondlp->nlp_nodename,
3724                        sizeof(struct lpfc_name));
3725         }
3726
3727         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
3728                 "Issue FARPR:     did:x%x",
3729                 ndlp->nlp_DID, 0, 0);
3730
3731         phba->fc_stat.elsXmitFARPR++;
3732         elsiocb->cmd_cmpl = lpfc_cmpl_els_cmd;
3733         elsiocb->ndlp = lpfc_nlp_get(ndlp);
3734         if (!elsiocb->ndlp) {
3735                 lpfc_els_free_iocb(phba, elsiocb);
3736                 return 1;
3737         }
3738
3739         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
3740         if (rc == IOCB_ERROR) {
3741                 /* The additional lpfc_nlp_put will cause the following
3742                  * lpfc_els_free_iocb routine to trigger the release of
3743                  * the node.
3744                  */
3745                 lpfc_els_free_iocb(phba, elsiocb);
3746                 lpfc_nlp_put(ndlp);
3747                 return 1;
3748         }
3749         /* This will cause the callback-function lpfc_cmpl_els_cmd to
3750          * trigger the release of the node.
3751          */
3752         /* Don't release reference count as RDF is likely outstanding */
3753         return 0;
3754 }
3755
3756 /**
3757  * lpfc_issue_els_rdf - Register for diagnostic functions from the fabric.
3758  * @vport: pointer to a host virtual N_Port data structure.
3759  * @retry: retry counter for the command IOCB.
3760  *
3761  * This routine issues an ELS RDF to the Fabric Controller to register
3762  * for diagnostic functions.
3763  *
3764  * Note that the ndlp reference count will be incremented by 1 for holding the
3765  * ndlp and the reference to ndlp will be stored into the ndlp field of
3766  * the IOCB for the completion callback function to the RDF ELS command.
3767  *
3768  * Return code
3769  *   0 - Successfully issued rdf command
3770  *   1 - Failed to issue rdf command
3771  **/
3772 int
3773 lpfc_issue_els_rdf(struct lpfc_vport *vport, uint8_t retry)
3774 {
3775         struct lpfc_hba *phba = vport->phba;
3776         struct lpfc_iocbq *elsiocb;
3777         struct lpfc_els_rdf_req *prdf;
3778         struct lpfc_nodelist *ndlp;
3779         uint16_t cmdsize;
3780         int rc;
3781
3782         cmdsize = sizeof(*prdf);
3783
3784         ndlp = lpfc_findnode_did(vport, Fabric_Cntl_DID);
3785         if (!ndlp) {
3786                 ndlp = lpfc_nlp_init(vport, Fabric_Cntl_DID);
3787                 if (!ndlp)
3788                         return -ENODEV;
3789                 lpfc_enqueue_node(vport, ndlp);
3790         }
3791
3792         /* RDF ELS is not required on an NPIV VN_Port. */
3793         if (vport->port_type == LPFC_NPIV_PORT)
3794                 return -EACCES;
3795
3796         elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, retry, ndlp,
3797                                      ndlp->nlp_DID, ELS_CMD_RDF);
3798         if (!elsiocb)
3799                 return -ENOMEM;
3800
3801         /* Configure the payload for the supported FPIN events. */
3802         prdf = (struct lpfc_els_rdf_req *)elsiocb->cmd_dmabuf->virt;
3803         memset(prdf, 0, cmdsize);
3804         prdf->rdf.fpin_cmd = ELS_RDF;
3805         prdf->rdf.desc_len = cpu_to_be32(sizeof(struct lpfc_els_rdf_req) -
3806                                          sizeof(struct fc_els_rdf));
3807         prdf->reg_d1.reg_desc.desc_tag = cpu_to_be32(ELS_DTAG_FPIN_REGISTER);
3808         prdf->reg_d1.reg_desc.desc_len = cpu_to_be32(
3809                                 FC_TLV_DESC_LENGTH_FROM_SZ(prdf->reg_d1));
3810         prdf->reg_d1.reg_desc.count = cpu_to_be32(ELS_RDF_REG_TAG_CNT);
3811         prdf->reg_d1.desc_tags[0] = cpu_to_be32(ELS_DTAG_LNK_INTEGRITY);
3812         prdf->reg_d1.desc_tags[1] = cpu_to_be32(ELS_DTAG_DELIVERY);
3813         prdf->reg_d1.desc_tags[2] = cpu_to_be32(ELS_DTAG_PEER_CONGEST);
3814         prdf->reg_d1.desc_tags[3] = cpu_to_be32(ELS_DTAG_CONGESTION);
3815
3816         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS | LOG_CGN_MGMT,
3817                          "6444 Xmit RDF to remote NPORT x%x Reg: %x %x\n",
3818                          ndlp->nlp_DID, phba->cgn_reg_signal,
3819                          phba->cgn_reg_fpin);
3820
3821         phba->cgn_fpin_frequency = LPFC_FPIN_INIT_FREQ;
3822         elsiocb->cmd_cmpl = lpfc_cmpl_els_disc_cmd;
3823         elsiocb->ndlp = lpfc_nlp_get(ndlp);
3824         if (!elsiocb->ndlp) {
3825                 lpfc_els_free_iocb(phba, elsiocb);
3826                 return -EIO;
3827         }
3828
3829         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
3830                               "Issue RDF:     did:x%x refcnt %d",
3831                               ndlp->nlp_DID, kref_read(&ndlp->kref), 0);
3832
3833         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
3834         if (rc == IOCB_ERROR) {
3835                 lpfc_els_free_iocb(phba, elsiocb);
3836                 lpfc_nlp_put(ndlp);
3837                 return -EIO;
3838         }
3839         return 0;
3840 }
3841
3842  /**
3843   * lpfc_els_rcv_rdf - Receive RDF ELS request from the fabric.
3844   * @vport: pointer to a host virtual N_Port data structure.
3845   * @cmdiocb: pointer to lpfc command iocb data structure.
3846   * @ndlp: pointer to a node-list data structure.
3847   *
3848   * A received RDF implies a possible change to fabric supported diagnostic
3849   * functions.  This routine sends LS_ACC and then has the Nx_Port issue a new
3850   * RDF request to reregister for supported diagnostic functions.
3851   *
3852   * Return code
3853   *   0 - Success
3854   *   -EIO - Failed to process received RDF
3855   **/
3856 static int
3857 lpfc_els_rcv_rdf(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
3858                  struct lpfc_nodelist *ndlp)
3859 {
3860         /* Send LS_ACC */
3861         if (lpfc_els_rsp_acc(vport, ELS_CMD_RDF, cmdiocb, ndlp, NULL)) {
3862                 lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS | LOG_CGN_MGMT,
3863                                  "1623 Failed to RDF_ACC from x%x for x%x\n",
3864                                  ndlp->nlp_DID, vport->fc_myDID);
3865                 return -EIO;
3866         }
3867
3868         /* Issue new RDF for reregistering */
3869         if (lpfc_issue_els_rdf(vport, 0)) {
3870                 lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS | LOG_CGN_MGMT,
3871                                  "2623 Failed to re register RDF for x%x\n",
3872                                  vport->fc_myDID);
3873                 return -EIO;
3874         }
3875
3876         return 0;
3877 }
3878
3879 /**
3880  * lpfc_least_capable_settings - helper function for EDC rsp processing
3881  * @phba: pointer to lpfc hba data structure.
3882  * @pcgd: pointer to congestion detection descriptor in EDC rsp.
3883  *
3884  * This helper routine determines the least capable setting for
3885  * congestion signals, signal freq, including scale, from the
3886  * congestion detection descriptor in the EDC rsp.  The routine
3887  * sets @phba values in preparation for a set_featues mailbox.
3888  **/
3889 static void
3890 lpfc_least_capable_settings(struct lpfc_hba *phba,
3891                             struct fc_diag_cg_sig_desc *pcgd)
3892 {
3893         u32 rsp_sig_cap = 0, drv_sig_cap = 0;
3894         u32 rsp_sig_freq_cyc = 0, rsp_sig_freq_scale = 0;
3895
3896         /* Get rsp signal and frequency capabilities.  */
3897         rsp_sig_cap = be32_to_cpu(pcgd->xmt_signal_capability);
3898         rsp_sig_freq_cyc = be16_to_cpu(pcgd->xmt_signal_frequency.count);
3899         rsp_sig_freq_scale = be16_to_cpu(pcgd->xmt_signal_frequency.units);
3900
3901         /* If the Fport does not support signals. Set FPIN only */
3902         if (rsp_sig_cap == EDC_CG_SIG_NOTSUPPORTED)
3903                 goto out_no_support;
3904
3905         /* Apply the xmt scale to the xmt cycle to get the correct frequency.
3906          * Adapter default is 100 millisSeconds.  Convert all xmt cycle values
3907          * to milliSeconds.
3908          */
3909         switch (rsp_sig_freq_scale) {
3910         case EDC_CG_SIGFREQ_SEC:
3911                 rsp_sig_freq_cyc *= MSEC_PER_SEC;
3912                 break;
3913         case EDC_CG_SIGFREQ_MSEC:
3914                 rsp_sig_freq_cyc = 1;
3915                 break;
3916         default:
3917                 goto out_no_support;
3918         }
3919
3920         /* Convenient shorthand. */
3921         drv_sig_cap = phba->cgn_reg_signal;
3922
3923         /* Choose the least capable frequency. */
3924         if (rsp_sig_freq_cyc > phba->cgn_sig_freq)
3925                 phba->cgn_sig_freq = rsp_sig_freq_cyc;
3926
3927         /* Should be some common signals support. Settle on least capable
3928          * signal and adjust FPIN values. Initialize defaults to ease the
3929          * decision.
3930          */
3931         phba->cgn_reg_fpin = LPFC_CGN_FPIN_WARN | LPFC_CGN_FPIN_ALARM;
3932         phba->cgn_reg_signal = EDC_CG_SIG_NOTSUPPORTED;
3933         if (rsp_sig_cap == EDC_CG_SIG_WARN_ONLY &&
3934             (drv_sig_cap == EDC_CG_SIG_WARN_ONLY ||
3935              drv_sig_cap == EDC_CG_SIG_WARN_ALARM)) {
3936                 phba->cgn_reg_signal = EDC_CG_SIG_WARN_ONLY;
3937                 phba->cgn_reg_fpin &= ~LPFC_CGN_FPIN_WARN;
3938         }
3939         if (rsp_sig_cap == EDC_CG_SIG_WARN_ALARM) {
3940                 if (drv_sig_cap == EDC_CG_SIG_WARN_ALARM) {
3941                         phba->cgn_reg_signal = EDC_CG_SIG_WARN_ALARM;
3942                         phba->cgn_reg_fpin = LPFC_CGN_FPIN_NONE;
3943                 }
3944                 if (drv_sig_cap == EDC_CG_SIG_WARN_ONLY) {
3945                         phba->cgn_reg_signal = EDC_CG_SIG_WARN_ONLY;
3946                         phba->cgn_reg_fpin &= ~LPFC_CGN_FPIN_WARN;
3947                 }
3948         }
3949
3950         /* We are NOT recording signal frequency in congestion info buffer */
3951         return;
3952
3953 out_no_support:
3954         phba->cgn_reg_signal = EDC_CG_SIG_NOTSUPPORTED;
3955         phba->cgn_sig_freq = 0;
3956         phba->cgn_reg_fpin = LPFC_CGN_FPIN_ALARM | LPFC_CGN_FPIN_WARN;
3957 }
3958
3959 DECLARE_ENUM2STR_LOOKUP(lpfc_get_tlv_dtag_nm, fc_ls_tlv_dtag,
3960                         FC_LS_TLV_DTAG_INIT);
3961
3962 /**
3963  * lpfc_cmpl_els_edc - Completion callback function for EDC
3964  * @phba: pointer to lpfc hba data structure.
3965  * @cmdiocb: pointer to lpfc command iocb data structure.
3966  * @rspiocb: pointer to lpfc response iocb data structure.
3967  *
3968  * This routine is the completion callback function for issuing the Exchange
3969  * Diagnostic Capabilities (EDC) command. The driver issues an EDC to
3970  * notify the FPort of its Congestion and Link Fault capabilities.  This
3971  * routine parses the FPort's response and decides on the least common
3972  * values applicable to both FPort and NPort for Warnings and Alarms that
3973  * are communicated via hardware signals.
3974  **/
3975 static void
3976 lpfc_cmpl_els_edc(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
3977                   struct lpfc_iocbq *rspiocb)
3978 {
3979         IOCB_t *irsp_iocb;
3980         struct fc_els_edc_resp *edc_rsp;
3981         struct fc_tlv_desc *tlv;
3982         struct fc_diag_cg_sig_desc *pcgd;
3983         struct fc_diag_lnkflt_desc *plnkflt;
3984         struct lpfc_dmabuf *pcmd, *prsp;
3985         const char *dtag_nm;
3986         u32 *pdata, dtag;
3987         int desc_cnt = 0, bytes_remain;
3988         bool rcv_cap_desc = false;
3989         struct lpfc_nodelist *ndlp;
3990         u32 ulp_status, ulp_word4, tmo, did, iotag;
3991
3992         ndlp = cmdiocb->ndlp;
3993
3994         ulp_status = get_job_ulpstatus(phba, rspiocb);
3995         ulp_word4 = get_job_word4(phba, rspiocb);
3996         did = get_job_els_rsp64_did(phba, rspiocb);
3997
3998         if (phba->sli_rev == LPFC_SLI_REV4) {
3999                 tmo = get_wqe_tmo(rspiocb);
4000                 iotag = get_wqe_reqtag(rspiocb);
4001         } else {
4002                 irsp_iocb = &rspiocb->iocb;
4003                 tmo = irsp_iocb->ulpTimeout;
4004                 iotag = irsp_iocb->ulpIoTag;
4005         }
4006
4007         lpfc_debugfs_disc_trc(phba->pport, LPFC_DISC_TRC_ELS_CMD,
4008                               "EDC cmpl:    status:x%x/x%x did:x%x",
4009                               ulp_status, ulp_word4, did);
4010
4011         /* ELS cmd tag <ulpIoTag> completes */
4012         lpfc_printf_log(phba, KERN_INFO, LOG_ELS | LOG_CGN_MGMT,
4013                         "4201 EDC cmd tag x%x completes Data: x%x x%x x%x\n",
4014                         iotag, ulp_status, ulp_word4, tmo);
4015
4016         pcmd = cmdiocb->cmd_dmabuf;
4017         if (!pcmd)
4018                 goto out;
4019
4020         pdata = (u32 *)pcmd->virt;
4021         if (!pdata)
4022                 goto out;
4023
4024         /* Need to clear signal values, send features MB and RDF with FPIN. */
4025         if (ulp_status)
4026                 goto out;
4027
4028         prsp = list_get_first(&pcmd->list, struct lpfc_dmabuf, list);
4029         if (!prsp)
4030                 goto out;
4031
4032         edc_rsp = prsp->virt;
4033         if (!edc_rsp)
4034                 goto out;
4035
4036         /* ELS cmd tag <ulpIoTag> completes */
4037         lpfc_printf_log(phba, KERN_INFO,
4038                         LOG_ELS | LOG_CGN_MGMT | LOG_LDS_EVENT,
4039                         "4676 Fabric EDC Rsp: "
4040                         "0x%02x, 0x%08x\n",
4041                         edc_rsp->acc_hdr.la_cmd,
4042                         be32_to_cpu(edc_rsp->desc_list_len));
4043
4044         /*
4045          * Payload length in bytes is the response descriptor list
4046          * length minus the 12 bytes of Link Service Request
4047          * Information descriptor in the reply.
4048          */
4049         bytes_remain = be32_to_cpu(edc_rsp->desc_list_len) -
4050                                    sizeof(struct fc_els_lsri_desc);
4051         if (bytes_remain <= 0)
4052                 goto out;
4053
4054         tlv = edc_rsp->desc;
4055
4056         /*
4057          * cycle through EDC diagnostic descriptors to find the
4058          * congestion signaling capability descriptor
4059          */
4060         while (bytes_remain) {
4061                 if (bytes_remain < FC_TLV_DESC_HDR_SZ) {
4062                         lpfc_printf_log(phba, KERN_WARNING, LOG_CGN_MGMT,
4063                                         "6461 Truncated TLV hdr on "
4064                                         "Diagnostic descriptor[%d]\n",
4065                                         desc_cnt);
4066                         goto out;
4067                 }
4068
4069                 dtag = be32_to_cpu(tlv->desc_tag);
4070                 switch (dtag) {
4071                 case ELS_DTAG_LNK_FAULT_CAP:
4072                         if (bytes_remain < FC_TLV_DESC_SZ_FROM_LENGTH(tlv) ||
4073                             FC_TLV_DESC_SZ_FROM_LENGTH(tlv) !=
4074                                         sizeof(struct fc_diag_lnkflt_desc)) {
4075                                 lpfc_printf_log(phba, KERN_WARNING,
4076                                         LOG_ELS | LOG_CGN_MGMT | LOG_LDS_EVENT,
4077                                         "6462 Truncated Link Fault Diagnostic "
4078                                         "descriptor[%d]: %d vs 0x%zx 0x%zx\n",
4079                                         desc_cnt, bytes_remain,
4080                                         FC_TLV_DESC_SZ_FROM_LENGTH(tlv),
4081                                         sizeof(struct fc_diag_lnkflt_desc));
4082                                 goto out;
4083                         }
4084                         plnkflt = (struct fc_diag_lnkflt_desc *)tlv;
4085                         lpfc_printf_log(phba, KERN_INFO,
4086                                 LOG_ELS | LOG_LDS_EVENT,
4087                                 "4617 Link Fault Desc Data: 0x%08x 0x%08x "
4088                                 "0x%08x 0x%08x 0x%08x\n",
4089                                 be32_to_cpu(plnkflt->desc_tag),
4090                                 be32_to_cpu(plnkflt->desc_len),
4091                                 be32_to_cpu(
4092                                         plnkflt->degrade_activate_threshold),
4093                                 be32_to_cpu(
4094                                         plnkflt->degrade_deactivate_threshold),
4095                                 be32_to_cpu(plnkflt->fec_degrade_interval));
4096                         break;
4097                 case ELS_DTAG_CG_SIGNAL_CAP:
4098                         if (bytes_remain < FC_TLV_DESC_SZ_FROM_LENGTH(tlv) ||
4099                             FC_TLV_DESC_SZ_FROM_LENGTH(tlv) !=
4100                                         sizeof(struct fc_diag_cg_sig_desc)) {
4101                                 lpfc_printf_log(
4102                                         phba, KERN_WARNING, LOG_CGN_MGMT,
4103                                         "6463 Truncated Cgn Signal Diagnostic "
4104                                         "descriptor[%d]: %d vs 0x%zx 0x%zx\n",
4105                                         desc_cnt, bytes_remain,
4106                                         FC_TLV_DESC_SZ_FROM_LENGTH(tlv),
4107                                         sizeof(struct fc_diag_cg_sig_desc));
4108                                 goto out;
4109                         }
4110
4111                         pcgd = (struct fc_diag_cg_sig_desc *)tlv;
4112                         lpfc_printf_log(
4113                                 phba, KERN_INFO, LOG_ELS | LOG_CGN_MGMT,
4114                                 "4616 CGN Desc Data: 0x%08x 0x%08x "
4115                                 "0x%08x 0x%04x 0x%04x 0x%08x 0x%04x 0x%04x\n",
4116                                 be32_to_cpu(pcgd->desc_tag),
4117                                 be32_to_cpu(pcgd->desc_len),
4118                                 be32_to_cpu(pcgd->xmt_signal_capability),
4119                                 be16_to_cpu(pcgd->xmt_signal_frequency.count),
4120                                 be16_to_cpu(pcgd->xmt_signal_frequency.units),
4121                                 be32_to_cpu(pcgd->rcv_signal_capability),
4122                                 be16_to_cpu(pcgd->rcv_signal_frequency.count),
4123                                 be16_to_cpu(pcgd->rcv_signal_frequency.units));
4124
4125                         /* Compare driver and Fport capabilities and choose
4126                          * least common.
4127                          */
4128                         lpfc_least_capable_settings(phba, pcgd);
4129                         rcv_cap_desc = true;
4130                         break;
4131                 default:
4132                         dtag_nm = lpfc_get_tlv_dtag_nm(dtag);
4133                         lpfc_printf_log(phba, KERN_WARNING, LOG_CGN_MGMT,
4134                                         "4919 unknown Diagnostic "
4135                                         "Descriptor[%d]: tag x%x (%s)\n",
4136                                         desc_cnt, dtag, dtag_nm);
4137                 }
4138
4139                 bytes_remain -= FC_TLV_DESC_SZ_FROM_LENGTH(tlv);
4140                 tlv = fc_tlv_next_desc(tlv);
4141                 desc_cnt++;
4142         }
4143
4144 out:
4145         if (!rcv_cap_desc) {
4146                 phba->cgn_reg_fpin = LPFC_CGN_FPIN_ALARM | LPFC_CGN_FPIN_WARN;
4147                 phba->cgn_reg_signal = EDC_CG_SIG_NOTSUPPORTED;
4148                 phba->cgn_sig_freq = 0;
4149                 lpfc_printf_log(phba, KERN_WARNING, LOG_ELS | LOG_CGN_MGMT,
4150                                 "4202 EDC rsp error - sending RDF "
4151                                 "for FPIN only.\n");
4152         }
4153
4154         lpfc_config_cgn_signal(phba);
4155
4156         /* Check to see if link went down during discovery */
4157         lpfc_els_chk_latt(phba->pport);
4158         lpfc_debugfs_disc_trc(phba->pport, LPFC_DISC_TRC_ELS_CMD,
4159                               "EDC Cmpl:     did:x%x refcnt %d",
4160                               ndlp->nlp_DID, kref_read(&ndlp->kref), 0);
4161         lpfc_els_free_iocb(phba, cmdiocb);
4162         lpfc_nlp_put(ndlp);
4163 }
4164
4165 static void
4166 lpfc_format_edc_lft_desc(struct lpfc_hba *phba, struct fc_tlv_desc *tlv)
4167 {
4168         struct fc_diag_lnkflt_desc *lft = (struct fc_diag_lnkflt_desc *)tlv;
4169
4170         lft->desc_tag = cpu_to_be32(ELS_DTAG_LNK_FAULT_CAP);
4171         lft->desc_len = cpu_to_be32(
4172                 FC_TLV_DESC_LENGTH_FROM_SZ(struct fc_diag_lnkflt_desc));
4173
4174         lft->degrade_activate_threshold =
4175                 cpu_to_be32(phba->degrade_activate_threshold);
4176         lft->degrade_deactivate_threshold =
4177                 cpu_to_be32(phba->degrade_deactivate_threshold);
4178         lft->fec_degrade_interval = cpu_to_be32(phba->fec_degrade_interval);
4179 }
4180
4181 static void
4182 lpfc_format_edc_cgn_desc(struct lpfc_hba *phba, struct fc_tlv_desc *tlv)
4183 {
4184         struct fc_diag_cg_sig_desc *cgd = (struct fc_diag_cg_sig_desc *)tlv;
4185
4186         /* We are assuming cgd was zero'ed before calling this routine */
4187
4188         /* Configure the congestion detection capability */
4189         cgd->desc_tag = cpu_to_be32(ELS_DTAG_CG_SIGNAL_CAP);
4190
4191         /* Descriptor len doesn't include the tag or len fields. */
4192         cgd->desc_len = cpu_to_be32(
4193                 FC_TLV_DESC_LENGTH_FROM_SZ(struct fc_diag_cg_sig_desc));
4194
4195         /* xmt_signal_capability already set to EDC_CG_SIG_NOTSUPPORTED.
4196          * xmt_signal_frequency.count already set to 0.
4197          * xmt_signal_frequency.units already set to 0.
4198          */
4199
4200         if (phba->cmf_active_mode == LPFC_CFG_OFF) {
4201                 /* rcv_signal_capability already set to EDC_CG_SIG_NOTSUPPORTED.
4202                  * rcv_signal_frequency.count already set to 0.
4203                  * rcv_signal_frequency.units already set to 0.
4204                  */
4205                 phba->cgn_sig_freq = 0;
4206                 return;
4207         }
4208         switch (phba->cgn_reg_signal) {
4209         case EDC_CG_SIG_WARN_ONLY:
4210                 cgd->rcv_signal_capability = cpu_to_be32(EDC_CG_SIG_WARN_ONLY);
4211                 break;
4212         case EDC_CG_SIG_WARN_ALARM:
4213                 cgd->rcv_signal_capability = cpu_to_be32(EDC_CG_SIG_WARN_ALARM);
4214                 break;
4215         default:
4216                 /* rcv_signal_capability left 0 thus no support */
4217                 break;
4218         }
4219
4220         /* We start negotiation with lpfc_fabric_cgn_frequency, after
4221          * the completion we settle on the higher frequency.
4222          */
4223         cgd->rcv_signal_frequency.count =
4224                 cpu_to_be16(lpfc_fabric_cgn_frequency);
4225         cgd->rcv_signal_frequency.units =
4226                 cpu_to_be16(EDC_CG_SIGFREQ_MSEC);
4227 }
4228
4229 static bool
4230 lpfc_link_is_lds_capable(struct lpfc_hba *phba)
4231 {
4232         if (!(phba->lmt & LMT_64Gb))
4233                 return false;
4234         if (phba->sli_rev != LPFC_SLI_REV4)
4235                 return false;
4236
4237         if (phba->sli4_hba.conf_trunk) {
4238                 if (phba->trunk_link.phy_lnk_speed == LPFC_USER_LINK_SPEED_64G)
4239                         return true;
4240         } else if (phba->fc_linkspeed == LPFC_LINK_SPEED_64GHZ) {
4241                 return true;
4242         }
4243         return false;
4244 }
4245
4246  /**
4247   * lpfc_issue_els_edc - Exchange Diagnostic Capabilities with the fabric.
4248   * @vport: pointer to a host virtual N_Port data structure.
4249   * @retry: retry counter for the command iocb.
4250   *
4251   * This routine issues an ELS EDC to the F-Port Controller to communicate
4252   * this N_Port's support of hardware signals in its Congestion
4253   * Capabilities Descriptor.
4254   *
4255   * Note: This routine does not check if one or more signals are
4256   * set in the cgn_reg_signal parameter.  The caller makes the
4257   * decision to enforce cgn_reg_signal as nonzero or zero depending
4258   * on the conditions.  During Fabric requests, the driver
4259   * requires cgn_reg_signals to be nonzero.  But a dynamic request
4260   * to set the congestion mode to OFF from Monitor or Manage
4261   * would correctly issue an EDC with no signals enabled to
4262   * turn off switch functionality and then update the FW.
4263   *
4264   * Return code
4265   *   0 - Successfully issued edc command
4266   *   1 - Failed to issue edc command
4267   **/
4268 int
4269 lpfc_issue_els_edc(struct lpfc_vport *vport, uint8_t retry)
4270 {
4271         struct lpfc_hba  *phba = vport->phba;
4272         struct lpfc_iocbq *elsiocb;
4273         struct fc_els_edc *edc_req;
4274         struct fc_tlv_desc *tlv;
4275         u16 cmdsize;
4276         struct lpfc_nodelist *ndlp;
4277         u8 *pcmd = NULL;
4278         u32 cgn_desc_size, lft_desc_size;
4279         int rc;
4280
4281         if (vport->port_type == LPFC_NPIV_PORT)
4282                 return -EACCES;
4283
4284         ndlp = lpfc_findnode_did(vport, Fabric_DID);
4285         if (!ndlp || ndlp->nlp_state != NLP_STE_UNMAPPED_NODE)
4286                 return -ENODEV;
4287
4288         cgn_desc_size = (phba->cgn_init_reg_signal) ?
4289                                 sizeof(struct fc_diag_cg_sig_desc) : 0;
4290         lft_desc_size = (lpfc_link_is_lds_capable(phba)) ?
4291                                 sizeof(struct fc_diag_lnkflt_desc) : 0;
4292         cmdsize = cgn_desc_size + lft_desc_size;
4293
4294         /* Skip EDC if no applicable descriptors */
4295         if (!cmdsize)
4296                 goto try_rdf;
4297
4298         cmdsize += sizeof(struct fc_els_edc);
4299         elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, retry, ndlp,
4300                                      ndlp->nlp_DID, ELS_CMD_EDC);
4301         if (!elsiocb)
4302                 goto try_rdf;
4303
4304         /* Configure the payload for the supported Diagnostics capabilities. */
4305         pcmd = (u8 *)elsiocb->cmd_dmabuf->virt;
4306         memset(pcmd, 0, cmdsize);
4307         edc_req = (struct fc_els_edc *)pcmd;
4308         edc_req->desc_len = cpu_to_be32(cgn_desc_size + lft_desc_size);
4309         edc_req->edc_cmd = ELS_EDC;
4310         tlv = edc_req->desc;
4311
4312         if (cgn_desc_size) {
4313                 lpfc_format_edc_cgn_desc(phba, tlv);
4314                 phba->cgn_sig_freq = lpfc_fabric_cgn_frequency;
4315                 tlv = fc_tlv_next_desc(tlv);
4316         }
4317
4318         if (lft_desc_size)
4319                 lpfc_format_edc_lft_desc(phba, tlv);
4320
4321         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS | LOG_CGN_MGMT,
4322                          "4623 Xmit EDC to remote "
4323                          "NPORT x%x reg_sig x%x reg_fpin:x%x\n",
4324                          ndlp->nlp_DID, phba->cgn_reg_signal,
4325                          phba->cgn_reg_fpin);
4326
4327         elsiocb->cmd_cmpl = lpfc_cmpl_els_disc_cmd;
4328         elsiocb->ndlp = lpfc_nlp_get(ndlp);
4329         if (!elsiocb->ndlp) {
4330                 lpfc_els_free_iocb(phba, elsiocb);
4331                 return -EIO;
4332         }
4333
4334         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
4335                               "Issue EDC:     did:x%x refcnt %d",
4336                               ndlp->nlp_DID, kref_read(&ndlp->kref), 0);
4337         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
4338         if (rc == IOCB_ERROR) {
4339                 /* The additional lpfc_nlp_put will cause the following
4340                  * lpfc_els_free_iocb routine to trigger the rlease of
4341                  * the node.
4342                  */
4343                 lpfc_els_free_iocb(phba, elsiocb);
4344                 lpfc_nlp_put(ndlp);
4345                 goto try_rdf;
4346         }
4347         return 0;
4348 try_rdf:
4349         phba->cgn_reg_fpin = LPFC_CGN_FPIN_WARN | LPFC_CGN_FPIN_ALARM;
4350         phba->cgn_reg_signal = EDC_CG_SIG_NOTSUPPORTED;
4351         rc = lpfc_issue_els_rdf(vport, 0);
4352         return rc;
4353 }
4354
4355 /**
4356  * lpfc_cancel_retry_delay_tmo - Cancel the timer with delayed iocb-cmd retry
4357  * @vport: pointer to a host virtual N_Port data structure.
4358  * @nlp: pointer to a node-list data structure.
4359  *
4360  * This routine cancels the timer with a delayed IOCB-command retry for
4361  * a @vport's @ndlp. It stops the timer for the delayed function retrial and
4362  * removes the ELS retry event if it presents. In addition, if the
4363  * NLP_NPR_2B_DISC bit is set in the @nlp's nlp_flag bitmap, ADISC IOCB
4364  * commands are sent for the @vport's nodes that require issuing discovery
4365  * ADISC.
4366  **/
4367 void
4368 lpfc_cancel_retry_delay_tmo(struct lpfc_vport *vport, struct lpfc_nodelist *nlp)
4369 {
4370         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
4371         struct lpfc_work_evt *evtp;
4372
4373         if (!(nlp->nlp_flag & NLP_DELAY_TMO))
4374                 return;
4375         spin_lock_irq(&nlp->lock);
4376         nlp->nlp_flag &= ~NLP_DELAY_TMO;
4377         spin_unlock_irq(&nlp->lock);
4378         del_timer_sync(&nlp->nlp_delayfunc);
4379         nlp->nlp_last_elscmd = 0;
4380         if (!list_empty(&nlp->els_retry_evt.evt_listp)) {
4381                 list_del_init(&nlp->els_retry_evt.evt_listp);
4382                 /* Decrement nlp reference count held for the delayed retry */
4383                 evtp = &nlp->els_retry_evt;
4384                 lpfc_nlp_put((struct lpfc_nodelist *)evtp->evt_arg1);
4385         }
4386         if (nlp->nlp_flag & NLP_NPR_2B_DISC) {
4387                 spin_lock_irq(&nlp->lock);
4388                 nlp->nlp_flag &= ~NLP_NPR_2B_DISC;
4389                 spin_unlock_irq(&nlp->lock);
4390                 if (vport->num_disc_nodes) {
4391                         if (vport->port_state < LPFC_VPORT_READY) {
4392                                 /* Check if there are more ADISCs to be sent */
4393                                 lpfc_more_adisc(vport);
4394                         } else {
4395                                 /* Check if there are more PLOGIs to be sent */
4396                                 lpfc_more_plogi(vport);
4397                                 if (vport->num_disc_nodes == 0) {
4398                                         spin_lock_irq(shost->host_lock);
4399                                         vport->fc_flag &= ~FC_NDISC_ACTIVE;
4400                                         spin_unlock_irq(shost->host_lock);
4401                                         lpfc_can_disctmo(vport);
4402                                         lpfc_end_rscn(vport);
4403                                 }
4404                         }
4405                 }
4406         }
4407         return;
4408 }
4409
4410 /**
4411  * lpfc_els_retry_delay - Timer function with a ndlp delayed function timer
4412  * @t: pointer to the timer function associated data (ndlp).
4413  *
4414  * This routine is invoked by the ndlp delayed-function timer to check
4415  * whether there is any pending ELS retry event(s) with the node. If not, it
4416  * simply returns. Otherwise, if there is at least one ELS delayed event, it
4417  * adds the delayed events to the HBA work list and invokes the
4418  * lpfc_worker_wake_up() routine to wake up worker thread to process the
4419  * event. Note that lpfc_nlp_get() is called before posting the event to
4420  * the work list to hold reference count of ndlp so that it guarantees the
4421  * reference to ndlp will still be available when the worker thread gets
4422  * to the event associated with the ndlp.
4423  **/
4424 void
4425 lpfc_els_retry_delay(struct timer_list *t)
4426 {
4427         struct lpfc_nodelist *ndlp = from_timer(ndlp, t, nlp_delayfunc);
4428         struct lpfc_vport *vport = ndlp->vport;
4429         struct lpfc_hba   *phba = vport->phba;
4430         unsigned long flags;
4431         struct lpfc_work_evt  *evtp = &ndlp->els_retry_evt;
4432
4433         spin_lock_irqsave(&phba->hbalock, flags);
4434         if (!list_empty(&evtp->evt_listp)) {
4435                 spin_unlock_irqrestore(&phba->hbalock, flags);
4436                 return;
4437         }
4438
4439         /* We need to hold the node by incrementing the reference
4440          * count until the queued work is done
4441          */
4442         evtp->evt_arg1  = lpfc_nlp_get(ndlp);
4443         if (evtp->evt_arg1) {
4444                 evtp->evt = LPFC_EVT_ELS_RETRY;
4445                 list_add_tail(&evtp->evt_listp, &phba->work_list);
4446                 lpfc_worker_wake_up(phba);
4447         }
4448         spin_unlock_irqrestore(&phba->hbalock, flags);
4449         return;
4450 }
4451
4452 /**
4453  * lpfc_els_retry_delay_handler - Work thread handler for ndlp delayed function
4454  * @ndlp: pointer to a node-list data structure.
4455  *
4456  * This routine is the worker-thread handler for processing the @ndlp delayed
4457  * event(s), posted by the lpfc_els_retry_delay() routine. It simply retrieves
4458  * the last ELS command from the associated ndlp and invokes the proper ELS
4459  * function according to the delayed ELS command to retry the command.
4460  **/
4461 void
4462 lpfc_els_retry_delay_handler(struct lpfc_nodelist *ndlp)
4463 {
4464         struct lpfc_vport *vport = ndlp->vport;
4465         uint32_t cmd, retry;
4466
4467         spin_lock_irq(&ndlp->lock);
4468         cmd = ndlp->nlp_last_elscmd;
4469         ndlp->nlp_last_elscmd = 0;
4470
4471         if (!(ndlp->nlp_flag & NLP_DELAY_TMO)) {
4472                 spin_unlock_irq(&ndlp->lock);
4473                 return;
4474         }
4475
4476         ndlp->nlp_flag &= ~NLP_DELAY_TMO;
4477         spin_unlock_irq(&ndlp->lock);
4478         /*
4479          * If a discovery event readded nlp_delayfunc after timer
4480          * firing and before processing the timer, cancel the
4481          * nlp_delayfunc.
4482          */
4483         del_timer_sync(&ndlp->nlp_delayfunc);
4484         retry = ndlp->nlp_retry;
4485         ndlp->nlp_retry = 0;
4486
4487         switch (cmd) {
4488         case ELS_CMD_FLOGI:
4489                 lpfc_issue_els_flogi(vport, ndlp, retry);
4490                 break;
4491         case ELS_CMD_PLOGI:
4492                 if (!lpfc_issue_els_plogi(vport, ndlp->nlp_DID, retry)) {
4493                         ndlp->nlp_prev_state = ndlp->nlp_state;
4494                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
4495                 }
4496                 break;
4497         case ELS_CMD_ADISC:
4498                 if (!lpfc_issue_els_adisc(vport, ndlp, retry)) {
4499                         ndlp->nlp_prev_state = ndlp->nlp_state;
4500                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_ADISC_ISSUE);
4501                 }
4502                 break;
4503         case ELS_CMD_PRLI:
4504         case ELS_CMD_NVMEPRLI:
4505                 if (!lpfc_issue_els_prli(vport, ndlp, retry)) {
4506                         ndlp->nlp_prev_state = ndlp->nlp_state;
4507                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_PRLI_ISSUE);
4508                 }
4509                 break;
4510         case ELS_CMD_LOGO:
4511                 if (!lpfc_issue_els_logo(vport, ndlp, retry)) {
4512                         ndlp->nlp_prev_state = ndlp->nlp_state;
4513                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_LOGO_ISSUE);
4514                 }
4515                 break;
4516         case ELS_CMD_FDISC:
4517                 if (!(vport->fc_flag & FC_VPORT_NEEDS_INIT_VPI))
4518                         lpfc_issue_els_fdisc(vport, ndlp, retry);
4519                 break;
4520         }
4521         return;
4522 }
4523
4524 /**
4525  * lpfc_link_reset - Issue link reset
4526  * @vport: pointer to a virtual N_Port data structure.
4527  *
4528  * This routine performs link reset by sending INIT_LINK mailbox command.
4529  * For SLI-3 adapter, link attention interrupt is enabled before issuing
4530  * INIT_LINK mailbox command.
4531  *
4532  * Return code
4533  *   0 - Link reset initiated successfully
4534  *   1 - Failed to initiate link reset
4535  **/
4536 int
4537 lpfc_link_reset(struct lpfc_vport *vport)
4538 {
4539         struct lpfc_hba *phba = vport->phba;
4540         LPFC_MBOXQ_t *mbox;
4541         uint32_t control;
4542         int rc;
4543
4544         lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
4545                          "2851 Attempt link reset\n");
4546         mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
4547         if (!mbox) {
4548                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
4549                                 "2852 Failed to allocate mbox memory");
4550                 return 1;
4551         }
4552
4553         /* Enable Link attention interrupts */
4554         if (phba->sli_rev <= LPFC_SLI_REV3) {
4555                 spin_lock_irq(&phba->hbalock);
4556                 phba->sli.sli_flag |= LPFC_PROCESS_LA;
4557                 control = readl(phba->HCregaddr);
4558                 control |= HC_LAINT_ENA;
4559                 writel(control, phba->HCregaddr);
4560                 readl(phba->HCregaddr); /* flush */
4561                 spin_unlock_irq(&phba->hbalock);
4562         }
4563
4564         lpfc_init_link(phba, mbox, phba->cfg_topology,
4565                        phba->cfg_link_speed);
4566         mbox->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
4567         mbox->vport = vport;
4568         rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
4569         if ((rc != MBX_BUSY) && (rc != MBX_SUCCESS)) {
4570                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
4571                                 "2853 Failed to issue INIT_LINK "
4572                                 "mbox command, rc:x%x\n", rc);
4573                 mempool_free(mbox, phba->mbox_mem_pool);
4574                 return 1;
4575         }
4576
4577         return 0;
4578 }
4579
4580 /**
4581  * lpfc_els_retry - Make retry decision on an els command iocb
4582  * @phba: pointer to lpfc hba data structure.
4583  * @cmdiocb: pointer to lpfc command iocb data structure.
4584  * @rspiocb: pointer to lpfc response iocb data structure.
4585  *
4586  * This routine makes a retry decision on an ELS command IOCB, which has
4587  * failed. The following ELS IOCBs use this function for retrying the command
4588  * when previously issued command responsed with error status: FLOGI, PLOGI,
4589  * PRLI, ADISC and FDISC. Based on the ELS command type and the
4590  * returned error status, it makes the decision whether a retry shall be
4591  * issued for the command, and whether a retry shall be made immediately or
4592  * delayed. In the former case, the corresponding ELS command issuing-function
4593  * is called to retry the command. In the later case, the ELS command shall
4594  * be posted to the ndlp delayed event and delayed function timer set to the
4595  * ndlp for the delayed command issusing.
4596  *
4597  * Return code
4598  *   0 - No retry of els command is made
4599  *   1 - Immediate or delayed retry of els command is made
4600  **/
4601 static int
4602 lpfc_els_retry(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
4603                struct lpfc_iocbq *rspiocb)
4604 {
4605         struct lpfc_vport *vport = cmdiocb->vport;
4606         union lpfc_wqe128 *irsp = &rspiocb->wqe;
4607         struct lpfc_nodelist *ndlp = cmdiocb->ndlp;
4608         struct lpfc_dmabuf *pcmd = cmdiocb->cmd_dmabuf;
4609         uint32_t *elscmd;
4610         struct ls_rjt stat;
4611         int retry = 0, maxretry = lpfc_max_els_tries, delay = 0;
4612         int logerr = 0;
4613         uint32_t cmd = 0;
4614         uint32_t did;
4615         int link_reset = 0, rc;
4616         u32 ulp_status = get_job_ulpstatus(phba, rspiocb);
4617         u32 ulp_word4 = get_job_word4(phba, rspiocb);
4618
4619
4620         /* Note: cmd_dmabuf may be 0 for internal driver abort
4621          * of delays ELS command.
4622          */
4623
4624         if (pcmd && pcmd->virt) {
4625                 elscmd = (uint32_t *) (pcmd->virt);
4626                 cmd = *elscmd++;
4627         }
4628
4629         if (ndlp)
4630                 did = ndlp->nlp_DID;
4631         else {
4632                 /* We should only hit this case for retrying PLOGI */
4633                 did = get_job_els_rsp64_did(phba, rspiocb);
4634                 ndlp = lpfc_findnode_did(vport, did);
4635                 if (!ndlp && (cmd != ELS_CMD_PLOGI))
4636                         return 0;
4637         }
4638
4639         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
4640                 "Retry ELS:       wd7:x%x wd4:x%x did:x%x",
4641                 *(((uint32_t *)irsp) + 7), ulp_word4, did);
4642
4643         switch (ulp_status) {
4644         case IOSTAT_FCP_RSP_ERROR:
4645                 break;
4646         case IOSTAT_REMOTE_STOP:
4647                 if (phba->sli_rev == LPFC_SLI_REV4) {
4648                         /* This IO was aborted by the target, we don't
4649                          * know the rxid and because we did not send the
4650                          * ABTS we cannot generate and RRQ.
4651                          */
4652                         lpfc_set_rrq_active(phba, ndlp,
4653                                          cmdiocb->sli4_lxritag, 0, 0);
4654                 }
4655                 break;
4656         case IOSTAT_LOCAL_REJECT:
4657                 switch ((ulp_word4 & IOERR_PARAM_MASK)) {
4658                 case IOERR_LOOP_OPEN_FAILURE:
4659                         if (cmd == ELS_CMD_PLOGI && cmdiocb->retry == 0)
4660                                 delay = 1000;
4661                         retry = 1;
4662                         break;
4663
4664                 case IOERR_ILLEGAL_COMMAND:
4665                         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
4666                                          "0124 Retry illegal cmd x%x "
4667                                          "retry:x%x delay:x%x\n",
4668                                          cmd, cmdiocb->retry, delay);
4669                         retry = 1;
4670                         /* All command's retry policy */
4671                         maxretry = 8;
4672                         if (cmdiocb->retry > 2)
4673                                 delay = 1000;
4674                         break;
4675
4676                 case IOERR_NO_RESOURCES:
4677                         logerr = 1; /* HBA out of resources */
4678                         retry = 1;
4679                         if (cmdiocb->retry > 100)
4680                                 delay = 100;
4681                         maxretry = 250;
4682                         break;
4683
4684                 case IOERR_ILLEGAL_FRAME:
4685                         delay = 100;
4686                         retry = 1;
4687                         break;
4688
4689                 case IOERR_INVALID_RPI:
4690                         if (cmd == ELS_CMD_PLOGI &&
4691                             did == NameServer_DID) {
4692                                 /* Continue forever if plogi to */
4693                                 /* the nameserver fails */
4694                                 maxretry = 0;
4695                                 delay = 100;
4696                         } else if (cmd == ELS_CMD_PRLI &&
4697                                    ndlp->nlp_state != NLP_STE_PRLI_ISSUE) {
4698                                 /* State-command disagreement.  The PRLI was
4699                                  * failed with an invalid rpi meaning there
4700                                  * some unexpected state change.  Don't retry.
4701                                  */
4702                                 maxretry = 0;
4703                                 retry = 0;
4704                                 break;
4705                         }
4706                         retry = 1;
4707                         break;
4708
4709                 case IOERR_SEQUENCE_TIMEOUT:
4710                         if (cmd == ELS_CMD_PLOGI &&
4711                             did == NameServer_DID &&
4712                             (cmdiocb->retry + 1) == maxretry) {
4713                                 /* Reset the Link */
4714                                 link_reset = 1;
4715                                 break;
4716                         }
4717                         retry = 1;
4718                         delay = 100;
4719                         break;
4720                 case IOERR_SLI_ABORTED:
4721                         /* Retry ELS PLOGI command?
4722                          * Possibly the rport just wasn't ready.
4723                          */
4724                         if (cmd == ELS_CMD_PLOGI) {
4725                                 /* No retry if state change */
4726                                 if (ndlp &&
4727                                     ndlp->nlp_state != NLP_STE_PLOGI_ISSUE)
4728                                         goto out_retry;
4729                                 retry = 1;
4730                                 maxretry = 2;
4731                         }
4732                         break;
4733                 }
4734                 break;
4735
4736         case IOSTAT_NPORT_RJT:
4737         case IOSTAT_FABRIC_RJT:
4738                 if (ulp_word4 & RJT_UNAVAIL_TEMP) {
4739                         retry = 1;
4740                         break;
4741                 }
4742                 break;
4743
4744         case IOSTAT_NPORT_BSY:
4745         case IOSTAT_FABRIC_BSY:
4746                 logerr = 1; /* Fabric / Remote NPort out of resources */
4747                 retry = 1;
4748                 break;
4749
4750         case IOSTAT_LS_RJT:
4751                 stat.un.ls_rjt_error_be = cpu_to_be32(ulp_word4);
4752                 /* Added for Vendor specifc support
4753                  * Just keep retrying for these Rsn / Exp codes
4754                  */
4755                 if ((vport->fc_flag & FC_PT2PT) &&
4756                     cmd == ELS_CMD_NVMEPRLI) {
4757                         switch (stat.un.b.lsRjtRsnCode) {
4758                         case LSRJT_UNABLE_TPC:
4759                         case LSRJT_INVALID_CMD:
4760                         case LSRJT_LOGICAL_ERR:
4761                         case LSRJT_CMD_UNSUPPORTED:
4762                                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_ELS,
4763                                                  "0168 NVME PRLI LS_RJT "
4764                                                  "reason %x port doesn't "
4765                                                  "support NVME, disabling NVME\n",
4766                                                  stat.un.b.lsRjtRsnCode);
4767                                 retry = 0;
4768                                 vport->fc_flag |= FC_PT2PT_NO_NVME;
4769                                 goto out_retry;
4770                         }
4771                 }
4772                 switch (stat.un.b.lsRjtRsnCode) {
4773                 case LSRJT_UNABLE_TPC:
4774                         /* Special case for PRLI LS_RJTs. Recall that lpfc
4775                          * uses a single routine to issue both PRLI FC4 types.
4776                          * If the PRLI is rejected because that FC4 type
4777                          * isn't really supported, don't retry and cause
4778                          * multiple transport registrations.  Otherwise, parse
4779                          * the reason code/reason code explanation and take the
4780                          * appropriate action.
4781                          */
4782                         lpfc_printf_vlog(vport, KERN_INFO,
4783                                          LOG_DISCOVERY | LOG_ELS | LOG_NODE,
4784                                          "0153 ELS cmd x%x LS_RJT by x%x. "
4785                                          "RsnCode x%x RsnCodeExp x%x\n",
4786                                          cmd, did, stat.un.b.lsRjtRsnCode,
4787                                          stat.un.b.lsRjtRsnCodeExp);
4788
4789                         switch (stat.un.b.lsRjtRsnCodeExp) {
4790                         case LSEXP_CANT_GIVE_DATA:
4791                         case LSEXP_CMD_IN_PROGRESS:
4792                                 if (cmd == ELS_CMD_PLOGI) {
4793                                         delay = 1000;
4794                                         maxretry = 48;
4795                                 }
4796                                 retry = 1;
4797                                 break;
4798                         case LSEXP_REQ_UNSUPPORTED:
4799                         case LSEXP_NO_RSRC_ASSIGN:
4800                                 /* These explanation codes get no retry. */
4801                                 if (cmd == ELS_CMD_PRLI ||
4802                                     cmd == ELS_CMD_NVMEPRLI)
4803                                         break;
4804                                 fallthrough;
4805                         default:
4806                                 /* Limit the delay and retry action to a limited
4807                                  * cmd set.  There are other ELS commands where
4808                                  * a retry is not expected.
4809                                  */
4810                                 if (cmd == ELS_CMD_PLOGI ||
4811                                     cmd == ELS_CMD_PRLI ||
4812                                     cmd == ELS_CMD_NVMEPRLI) {
4813                                         delay = 1000;
4814                                         maxretry = lpfc_max_els_tries + 1;
4815                                         retry = 1;
4816                                 }
4817                                 break;
4818                         }
4819
4820                         if ((phba->sli3_options & LPFC_SLI3_NPIV_ENABLED) &&
4821                           (cmd == ELS_CMD_FDISC) &&
4822                           (stat.un.b.lsRjtRsnCodeExp == LSEXP_OUT_OF_RESOURCE)){
4823                                 lpfc_printf_vlog(vport, KERN_ERR,
4824                                                  LOG_TRACE_EVENT,
4825                                                  "0125 FDISC Failed (x%x). "
4826                                                  "Fabric out of resources\n",
4827                                                  stat.un.lsRjtError);
4828                                 lpfc_vport_set_state(vport,
4829                                                      FC_VPORT_NO_FABRIC_RSCS);
4830                         }
4831                         break;
4832
4833                 case LSRJT_LOGICAL_BSY:
4834                         if ((cmd == ELS_CMD_PLOGI) ||
4835                             (cmd == ELS_CMD_PRLI) ||
4836                             (cmd == ELS_CMD_NVMEPRLI)) {
4837                                 delay = 1000;
4838                                 maxretry = 48;
4839                         } else if (cmd == ELS_CMD_FDISC) {
4840                                 /* FDISC retry policy */
4841                                 maxretry = 48;
4842                                 if (cmdiocb->retry >= 32)
4843                                         delay = 1000;
4844                         }
4845                         retry = 1;
4846                         break;
4847
4848                 case LSRJT_LOGICAL_ERR:
4849                         /* There are some cases where switches return this
4850                          * error when they are not ready and should be returning
4851                          * Logical Busy. We should delay every time.
4852                          */
4853                         if (cmd == ELS_CMD_FDISC &&
4854                             stat.un.b.lsRjtRsnCodeExp == LSEXP_PORT_LOGIN_REQ) {
4855                                 maxretry = 3;
4856                                 delay = 1000;
4857                                 retry = 1;
4858                         } else if (cmd == ELS_CMD_FLOGI &&
4859                                    stat.un.b.lsRjtRsnCodeExp ==
4860                                                 LSEXP_NOTHING_MORE) {
4861                                 vport->fc_sparam.cmn.bbRcvSizeMsb &= 0xf;
4862                                 retry = 1;
4863                                 lpfc_printf_vlog(vport, KERN_ERR,
4864                                                  LOG_TRACE_EVENT,
4865                                                  "0820 FLOGI Failed (x%x). "
4866                                                  "BBCredit Not Supported\n",
4867                                                  stat.un.lsRjtError);
4868                         }
4869                         break;
4870
4871                 case LSRJT_PROTOCOL_ERR:
4872                         if ((phba->sli3_options & LPFC_SLI3_NPIV_ENABLED) &&
4873                           (cmd == ELS_CMD_FDISC) &&
4874                           ((stat.un.b.lsRjtRsnCodeExp == LSEXP_INVALID_PNAME) ||
4875                           (stat.un.b.lsRjtRsnCodeExp == LSEXP_INVALID_NPORT_ID))
4876                           ) {
4877                                 lpfc_printf_vlog(vport, KERN_ERR,
4878                                                  LOG_TRACE_EVENT,
4879                                                  "0122 FDISC Failed (x%x). "
4880                                                  "Fabric Detected Bad WWN\n",
4881                                                  stat.un.lsRjtError);
4882                                 lpfc_vport_set_state(vport,
4883                                                      FC_VPORT_FABRIC_REJ_WWN);
4884                         }
4885                         break;
4886                 case LSRJT_VENDOR_UNIQUE:
4887                         if ((stat.un.b.vendorUnique == 0x45) &&
4888                             (cmd == ELS_CMD_FLOGI)) {
4889                                 goto out_retry;
4890                         }
4891                         break;
4892                 case LSRJT_CMD_UNSUPPORTED:
4893                         /* lpfc nvmet returns this type of LS_RJT when it
4894                          * receives an FCP PRLI because lpfc nvmet only
4895                          * support NVME.  ELS request is terminated for FCP4
4896                          * on this rport.
4897                          */
4898                         if (stat.un.b.lsRjtRsnCodeExp ==
4899                             LSEXP_REQ_UNSUPPORTED) {
4900                                 if (cmd == ELS_CMD_PRLI)
4901                                         goto out_retry;
4902                         }
4903                         break;
4904                 }
4905                 break;
4906
4907         case IOSTAT_INTERMED_RSP:
4908         case IOSTAT_BA_RJT:
4909                 break;
4910
4911         default:
4912                 break;
4913         }
4914
4915         if (link_reset) {
4916                 rc = lpfc_link_reset(vport);
4917                 if (rc) {
4918                         /* Do not give up. Retry PLOGI one more time and attempt
4919                          * link reset if PLOGI fails again.
4920                          */
4921                         retry = 1;
4922                         delay = 100;
4923                         goto out_retry;
4924                 }
4925                 return 1;
4926         }
4927
4928         if (did == FDMI_DID)
4929                 retry = 1;
4930
4931         if ((cmd == ELS_CMD_FLOGI) &&
4932             (phba->fc_topology != LPFC_TOPOLOGY_LOOP) &&
4933             !lpfc_error_lost_link(vport, ulp_status, ulp_word4)) {
4934                 /* FLOGI retry policy */
4935                 retry = 1;
4936                 /* retry FLOGI forever */
4937                 if (phba->link_flag != LS_LOOPBACK_MODE)
4938                         maxretry = 0;
4939                 else
4940                         maxretry = 2;
4941
4942                 if (cmdiocb->retry >= 100)
4943                         delay = 5000;
4944                 else if (cmdiocb->retry >= 32)
4945                         delay = 1000;
4946         } else if ((cmd == ELS_CMD_FDISC) &&
4947             !lpfc_error_lost_link(vport, ulp_status, ulp_word4)) {
4948                 /* retry FDISCs every second up to devloss */
4949                 retry = 1;
4950                 maxretry = vport->cfg_devloss_tmo;
4951                 delay = 1000;
4952         }
4953
4954         cmdiocb->retry++;
4955         if (maxretry && (cmdiocb->retry >= maxretry)) {
4956                 phba->fc_stat.elsRetryExceeded++;
4957                 retry = 0;
4958         }
4959
4960         if ((vport->load_flag & FC_UNLOADING) != 0)
4961                 retry = 0;
4962
4963 out_retry:
4964         if (retry) {
4965                 if ((cmd == ELS_CMD_PLOGI) || (cmd == ELS_CMD_FDISC)) {
4966                         /* Stop retrying PLOGI and FDISC if in FCF discovery */
4967                         if (phba->fcf.fcf_flag & FCF_DISCOVERY) {
4968                                 lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
4969                                                  "2849 Stop retry ELS command "
4970                                                  "x%x to remote NPORT x%x, "
4971                                                  "Data: x%x x%x\n", cmd, did,
4972                                                  cmdiocb->retry, delay);
4973                                 return 0;
4974                         }
4975                 }
4976
4977                 /* Retry ELS command <elsCmd> to remote NPORT <did> */
4978                 lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
4979                                  "0107 Retry ELS command x%x to remote "
4980                                  "NPORT x%x Data: x%x x%x\n",
4981                                  cmd, did, cmdiocb->retry, delay);
4982
4983                 if (((cmd == ELS_CMD_PLOGI) || (cmd == ELS_CMD_ADISC)) &&
4984                         ((ulp_status != IOSTAT_LOCAL_REJECT) ||
4985                         ((ulp_word4 & IOERR_PARAM_MASK) !=
4986                         IOERR_NO_RESOURCES))) {
4987                         /* Don't reset timer for no resources */
4988
4989                         /* If discovery / RSCN timer is running, reset it */
4990                         if (timer_pending(&vport->fc_disctmo) ||
4991                             (vport->fc_flag & FC_RSCN_MODE))
4992                                 lpfc_set_disctmo(vport);
4993                 }
4994
4995                 phba->fc_stat.elsXmitRetry++;
4996                 if (ndlp && delay) {
4997                         phba->fc_stat.elsDelayRetry++;
4998                         ndlp->nlp_retry = cmdiocb->retry;
4999
5000                         /* delay is specified in milliseconds */
5001                         mod_timer(&ndlp->nlp_delayfunc,
5002                                 jiffies + msecs_to_jiffies(delay));
5003                         spin_lock_irq(&ndlp->lock);
5004                         ndlp->nlp_flag |= NLP_DELAY_TMO;
5005                         spin_unlock_irq(&ndlp->lock);
5006
5007                         ndlp->nlp_prev_state = ndlp->nlp_state;
5008                         if ((cmd == ELS_CMD_PRLI) ||
5009                             (cmd == ELS_CMD_NVMEPRLI))
5010                                 lpfc_nlp_set_state(vport, ndlp,
5011                                         NLP_STE_PRLI_ISSUE);
5012                         else if (cmd != ELS_CMD_ADISC)
5013                                 lpfc_nlp_set_state(vport, ndlp,
5014                                         NLP_STE_NPR_NODE);
5015                         ndlp->nlp_last_elscmd = cmd;
5016
5017                         return 1;
5018                 }
5019                 switch (cmd) {
5020                 case ELS_CMD_FLOGI:
5021                         lpfc_issue_els_flogi(vport, ndlp, cmdiocb->retry);
5022                         return 1;
5023                 case ELS_CMD_FDISC:
5024                         lpfc_issue_els_fdisc(vport, ndlp, cmdiocb->retry);
5025                         return 1;
5026                 case ELS_CMD_PLOGI:
5027                         if (ndlp) {
5028                                 ndlp->nlp_prev_state = ndlp->nlp_state;
5029                                 lpfc_nlp_set_state(vport, ndlp,
5030                                                    NLP_STE_PLOGI_ISSUE);
5031                         }
5032                         lpfc_issue_els_plogi(vport, did, cmdiocb->retry);
5033                         return 1;
5034                 case ELS_CMD_ADISC:
5035                         ndlp->nlp_prev_state = ndlp->nlp_state;
5036                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_ADISC_ISSUE);
5037                         lpfc_issue_els_adisc(vport, ndlp, cmdiocb->retry);
5038                         return 1;
5039                 case ELS_CMD_PRLI:
5040                 case ELS_CMD_NVMEPRLI:
5041                         ndlp->nlp_prev_state = ndlp->nlp_state;
5042                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_PRLI_ISSUE);
5043                         lpfc_issue_els_prli(vport, ndlp, cmdiocb->retry);
5044                         return 1;
5045                 case ELS_CMD_LOGO:
5046                         ndlp->nlp_prev_state = ndlp->nlp_state;
5047                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_LOGO_ISSUE);
5048                         lpfc_issue_els_logo(vport, ndlp, cmdiocb->retry);
5049                         return 1;
5050                 }
5051         }
5052         /* No retry ELS command <elsCmd> to remote NPORT <did> */
5053         if (logerr) {
5054                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
5055                          "0137 No retry ELS command x%x to remote "
5056                          "NPORT x%x: Out of Resources: Error:x%x/%x\n",
5057                          cmd, did, ulp_status,
5058                          ulp_word4);
5059         }
5060         else {
5061                 lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
5062                          "0108 No retry ELS command x%x to remote "
5063                          "NPORT x%x Retried:%d Error:x%x/%x\n",
5064                          cmd, did, cmdiocb->retry, ulp_status,
5065                          ulp_word4);
5066         }
5067         return 0;
5068 }
5069
5070 /**
5071  * lpfc_els_free_data - Free lpfc dma buffer and data structure with an iocb
5072  * @phba: pointer to lpfc hba data structure.
5073  * @buf_ptr1: pointer to the lpfc DMA buffer data structure.
5074  *
5075  * This routine releases the lpfc DMA (Direct Memory Access) buffer(s)
5076  * associated with a command IOCB back to the lpfc DMA buffer pool. It first
5077  * checks to see whether there is a lpfc DMA buffer associated with the
5078  * response of the command IOCB. If so, it will be released before releasing
5079  * the lpfc DMA buffer associated with the IOCB itself.
5080  *
5081  * Return code
5082  *   0 - Successfully released lpfc DMA buffer (currently, always return 0)
5083  **/
5084 static int
5085 lpfc_els_free_data(struct lpfc_hba *phba, struct lpfc_dmabuf *buf_ptr1)
5086 {
5087         struct lpfc_dmabuf *buf_ptr;
5088
5089         /* Free the response before processing the command. */
5090         if (!list_empty(&buf_ptr1->list)) {
5091                 list_remove_head(&buf_ptr1->list, buf_ptr,
5092                                  struct lpfc_dmabuf,
5093                                  list);
5094                 lpfc_mbuf_free(phba, buf_ptr->virt, buf_ptr->phys);
5095                 kfree(buf_ptr);
5096         }
5097         lpfc_mbuf_free(phba, buf_ptr1->virt, buf_ptr1->phys);
5098         kfree(buf_ptr1);
5099         return 0;
5100 }
5101
5102 /**
5103  * lpfc_els_free_bpl - Free lpfc dma buffer and data structure with bpl
5104  * @phba: pointer to lpfc hba data structure.
5105  * @buf_ptr: pointer to the lpfc dma buffer data structure.
5106  *
5107  * This routine releases the lpfc Direct Memory Access (DMA) buffer
5108  * associated with a Buffer Pointer List (BPL) back to the lpfc DMA buffer
5109  * pool.
5110  *
5111  * Return code
5112  *   0 - Successfully released lpfc DMA buffer (currently, always return 0)
5113  **/
5114 static int
5115 lpfc_els_free_bpl(struct lpfc_hba *phba, struct lpfc_dmabuf *buf_ptr)
5116 {
5117         lpfc_mbuf_free(phba, buf_ptr->virt, buf_ptr->phys);
5118         kfree(buf_ptr);
5119         return 0;
5120 }
5121
5122 /**
5123  * lpfc_els_free_iocb - Free a command iocb and its associated resources
5124  * @phba: pointer to lpfc hba data structure.
5125  * @elsiocb: pointer to lpfc els command iocb data structure.
5126  *
5127  * This routine frees a command IOCB and its associated resources. The
5128  * command IOCB data structure contains the reference to various associated
5129  * resources, these fields must be set to NULL if the associated reference
5130  * not present:
5131  *   cmd_dmabuf - reference to cmd.
5132  *   cmd_dmabuf->next - reference to rsp
5133  *   rsp_dmabuf - unused
5134  *   bpl_dmabuf - reference to bpl
5135  *
5136  * It first properly decrements the reference count held on ndlp for the
5137  * IOCB completion callback function. If LPFC_DELAY_MEM_FREE flag is not
5138  * set, it invokes the lpfc_els_free_data() routine to release the Direct
5139  * Memory Access (DMA) buffers associated with the IOCB. Otherwise, it
5140  * adds the DMA buffer the @phba data structure for the delayed release.
5141  * If reference to the Buffer Pointer List (BPL) is present, the
5142  * lpfc_els_free_bpl() routine is invoked to release the DMA memory
5143  * associated with BPL. Finally, the lpfc_sli_release_iocbq() routine is
5144  * invoked to release the IOCB data structure back to @phba IOCBQ list.
5145  *
5146  * Return code
5147  *   0 - Success (currently, always return 0)
5148  **/
5149 int
5150 lpfc_els_free_iocb(struct lpfc_hba *phba, struct lpfc_iocbq *elsiocb)
5151 {
5152         struct lpfc_dmabuf *buf_ptr, *buf_ptr1;
5153
5154         /* The I/O iocb is complete.  Clear the node and first dmbuf */
5155         elsiocb->ndlp = NULL;
5156
5157         /* cmd_dmabuf = cmd,  cmd_dmabuf->next = rsp, bpl_dmabuf = bpl */
5158         if (elsiocb->cmd_dmabuf) {
5159                 if (elsiocb->cmd_flag & LPFC_DELAY_MEM_FREE) {
5160                         /* Firmware could still be in progress of DMAing
5161                          * payload, so don't free data buffer till after
5162                          * a hbeat.
5163                          */
5164                         elsiocb->cmd_flag &= ~LPFC_DELAY_MEM_FREE;
5165                         buf_ptr = elsiocb->cmd_dmabuf;
5166                         elsiocb->cmd_dmabuf = NULL;
5167                         if (buf_ptr) {
5168                                 buf_ptr1 = NULL;
5169                                 spin_lock_irq(&phba->hbalock);
5170                                 if (!list_empty(&buf_ptr->list)) {
5171                                         list_remove_head(&buf_ptr->list,
5172                                                 buf_ptr1, struct lpfc_dmabuf,
5173                                                 list);
5174                                         INIT_LIST_HEAD(&buf_ptr1->list);
5175                                         list_add_tail(&buf_ptr1->list,
5176                                                 &phba->elsbuf);
5177                                         phba->elsbuf_cnt++;
5178                                 }
5179                                 INIT_LIST_HEAD(&buf_ptr->list);
5180                                 list_add_tail(&buf_ptr->list, &phba->elsbuf);
5181                                 phba->elsbuf_cnt++;
5182                                 spin_unlock_irq(&phba->hbalock);
5183                         }
5184                 } else {
5185                         buf_ptr1 = elsiocb->cmd_dmabuf;
5186                         lpfc_els_free_data(phba, buf_ptr1);
5187                         elsiocb->cmd_dmabuf = NULL;
5188                 }
5189         }
5190
5191         if (elsiocb->bpl_dmabuf) {
5192                 buf_ptr = elsiocb->bpl_dmabuf;
5193                 lpfc_els_free_bpl(phba, buf_ptr);
5194                 elsiocb->bpl_dmabuf = NULL;
5195         }
5196         lpfc_sli_release_iocbq(phba, elsiocb);
5197         return 0;
5198 }
5199
5200 /**
5201  * lpfc_cmpl_els_logo_acc - Completion callback function to logo acc response
5202  * @phba: pointer to lpfc hba data structure.
5203  * @cmdiocb: pointer to lpfc command iocb data structure.
5204  * @rspiocb: pointer to lpfc response iocb data structure.
5205  *
5206  * This routine is the completion callback function to the Logout (LOGO)
5207  * Accept (ACC) Response ELS command. This routine is invoked to indicate
5208  * the completion of the LOGO process. It invokes the lpfc_nlp_not_used() to
5209  * release the ndlp if it has the last reference remaining (reference count
5210  * is 1). If succeeded (meaning ndlp released), it sets the iocb ndlp
5211  * field to NULL to inform the following lpfc_els_free_iocb() routine no
5212  * ndlp reference count needs to be decremented. Otherwise, the ndlp
5213  * reference use-count shall be decremented by the lpfc_els_free_iocb()
5214  * routine. Finally, the lpfc_els_free_iocb() is invoked to release the
5215  * IOCB data structure.
5216  **/
5217 static void
5218 lpfc_cmpl_els_logo_acc(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
5219                        struct lpfc_iocbq *rspiocb)
5220 {
5221         struct lpfc_nodelist *ndlp = cmdiocb->ndlp;
5222         struct lpfc_vport *vport = cmdiocb->vport;
5223         u32 ulp_status, ulp_word4;
5224
5225         ulp_status = get_job_ulpstatus(phba, rspiocb);
5226         ulp_word4 = get_job_word4(phba, rspiocb);
5227
5228         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
5229                 "ACC LOGO cmpl:   status:x%x/x%x did:x%x",
5230                 ulp_status, ulp_word4, ndlp->nlp_DID);
5231         /* ACC to LOGO completes to NPort <nlp_DID> */
5232         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
5233                          "0109 ACC to LOGO completes to NPort x%x refcnt %d "
5234                          "Data: x%x x%x x%x\n",
5235                          ndlp->nlp_DID, kref_read(&ndlp->kref), ndlp->nlp_flag,
5236                          ndlp->nlp_state, ndlp->nlp_rpi);
5237
5238         /* This clause allows the LOGO ACC to complete and free resources
5239          * for the Fabric Domain Controller.  It does deliberately skip
5240          * the unreg_rpi and release rpi because some fabrics send RDP
5241          * requests after logging out from the initiator.
5242          */
5243         if (ndlp->nlp_type & NLP_FABRIC &&
5244             ((ndlp->nlp_DID & WELL_KNOWN_DID_MASK) != WELL_KNOWN_DID_MASK))
5245                 goto out;
5246
5247         if (ndlp->nlp_state == NLP_STE_NPR_NODE) {
5248                 /* If PLOGI is being retried, PLOGI completion will cleanup the
5249                  * node. The NLP_NPR_2B_DISC flag needs to be retained to make
5250                  * progress on nodes discovered from last RSCN.
5251                  */
5252                 if ((ndlp->nlp_flag & NLP_DELAY_TMO) &&
5253                     (ndlp->nlp_last_elscmd == ELS_CMD_PLOGI))
5254                         goto out;
5255
5256                 /* NPort Recovery mode or node is just allocated */
5257                 if (!lpfc_nlp_not_used(ndlp)) {
5258                         /* A LOGO is completing and the node is in NPR state.
5259                          * Just unregister the RPI because the node is still
5260                          * required.
5261                          */
5262                         lpfc_unreg_rpi(vport, ndlp);
5263                 } else {
5264                         /* Indicate the node has already released, should
5265                          * not reference to it from within lpfc_els_free_iocb.
5266                          */
5267                         cmdiocb->ndlp = NULL;
5268                 }
5269         }
5270  out:
5271         /*
5272          * The driver received a LOGO from the rport and has ACK'd it.
5273          * At this point, the driver is done so release the IOCB
5274          */
5275         lpfc_els_free_iocb(phba, cmdiocb);
5276         lpfc_nlp_put(ndlp);
5277 }
5278
5279 /**
5280  * lpfc_mbx_cmpl_dflt_rpi - Completion callbk func for unreg dflt rpi mbox cmd
5281  * @phba: pointer to lpfc hba data structure.
5282  * @pmb: pointer to the driver internal queue element for mailbox command.
5283  *
5284  * This routine is the completion callback function for unregister default
5285  * RPI (Remote Port Index) mailbox command to the @phba. It simply releases
5286  * the associated lpfc Direct Memory Access (DMA) buffer back to the pool and
5287  * decrements the ndlp reference count held for this completion callback
5288  * function. After that, it invokes the lpfc_nlp_not_used() to check
5289  * whether there is only one reference left on the ndlp. If so, it will
5290  * perform one more decrement and trigger the release of the ndlp.
5291  **/
5292 void
5293 lpfc_mbx_cmpl_dflt_rpi(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
5294 {
5295         struct lpfc_nodelist *ndlp = pmb->ctx_ndlp;
5296         u32 mbx_flag = pmb->mbox_flag;
5297         u32 mbx_cmd = pmb->u.mb.mbxCommand;
5298
5299         if (ndlp) {
5300                 lpfc_printf_vlog(ndlp->vport, KERN_INFO, LOG_NODE,
5301                                  "0006 rpi x%x DID:%x flg:%x %d x%px "
5302                                  "mbx_cmd x%x mbx_flag x%x x%px\n",
5303                                  ndlp->nlp_rpi, ndlp->nlp_DID, ndlp->nlp_flag,
5304                                  kref_read(&ndlp->kref), ndlp, mbx_cmd,
5305                                  mbx_flag, pmb);
5306
5307                 /* This ends the default/temporary RPI cleanup logic for this
5308                  * ndlp and the node and rpi needs to be released. Free the rpi
5309                  * first on an UNREG_LOGIN and then release the final
5310                  * references.
5311                  */
5312                 spin_lock_irq(&ndlp->lock);
5313                 ndlp->nlp_flag &= ~NLP_REG_LOGIN_SEND;
5314                 if (mbx_cmd == MBX_UNREG_LOGIN)
5315                         ndlp->nlp_flag &= ~NLP_UNREG_INP;
5316                 spin_unlock_irq(&ndlp->lock);
5317                 lpfc_nlp_put(ndlp);
5318                 lpfc_drop_node(ndlp->vport, ndlp);
5319         }
5320
5321         lpfc_mbox_rsrc_cleanup(phba, pmb, MBOX_THD_UNLOCKED);
5322 }
5323
5324 /**
5325  * lpfc_cmpl_els_rsp - Completion callback function for els response iocb cmd
5326  * @phba: pointer to lpfc hba data structure.
5327  * @cmdiocb: pointer to lpfc command iocb data structure.
5328  * @rspiocb: pointer to lpfc response iocb data structure.
5329  *
5330  * This routine is the completion callback function for ELS Response IOCB
5331  * command. In normal case, this callback function just properly sets the
5332  * nlp_flag bitmap in the ndlp data structure, if the mbox command reference
5333  * field in the command IOCB is not NULL, the referred mailbox command will
5334  * be send out, and then invokes the lpfc_els_free_iocb() routine to release
5335  * the IOCB.
5336  **/
5337 static void
5338 lpfc_cmpl_els_rsp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
5339                   struct lpfc_iocbq *rspiocb)
5340 {
5341         struct lpfc_nodelist *ndlp = cmdiocb->ndlp;
5342         struct lpfc_vport *vport = ndlp ? ndlp->vport : NULL;
5343         struct Scsi_Host  *shost = vport ? lpfc_shost_from_vport(vport) : NULL;
5344         IOCB_t  *irsp;
5345         LPFC_MBOXQ_t *mbox = NULL;
5346         u32 ulp_status, ulp_word4, tmo, did, iotag;
5347
5348         if (!vport) {
5349                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
5350                                 "3177 ELS response failed\n");
5351                 goto out;
5352         }
5353         if (cmdiocb->context_un.mbox)
5354                 mbox = cmdiocb->context_un.mbox;
5355
5356         ulp_status = get_job_ulpstatus(phba, rspiocb);
5357         ulp_word4 = get_job_word4(phba, rspiocb);
5358         did = get_job_els_rsp64_did(phba, cmdiocb);
5359
5360         if (phba->sli_rev == LPFC_SLI_REV4) {
5361                 tmo = get_wqe_tmo(cmdiocb);
5362                 iotag = get_wqe_reqtag(cmdiocb);
5363         } else {
5364                 irsp = &rspiocb->iocb;
5365                 tmo = irsp->ulpTimeout;
5366                 iotag = irsp->ulpIoTag;
5367         }
5368
5369         /* Check to see if link went down during discovery */
5370         if (!ndlp || lpfc_els_chk_latt(vport)) {
5371                 if (mbox)
5372                         lpfc_mbox_rsrc_cleanup(phba, mbox, MBOX_THD_UNLOCKED);
5373                 goto out;
5374         }
5375
5376         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
5377                 "ELS rsp cmpl:    status:x%x/x%x did:x%x",
5378                 ulp_status, ulp_word4, did);
5379         /* ELS response tag <ulpIoTag> completes */
5380         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
5381                          "0110 ELS response tag x%x completes "
5382                          "Data: x%x x%x x%x x%x x%x x%x x%x x%x %p %p\n",
5383                          iotag, ulp_status, ulp_word4, tmo,
5384                          ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
5385                          ndlp->nlp_rpi, kref_read(&ndlp->kref), mbox, ndlp);
5386         if (mbox) {
5387                 if (ulp_status == 0
5388                     && (ndlp->nlp_flag & NLP_ACC_REGLOGIN)) {
5389                         if (!lpfc_unreg_rpi(vport, ndlp) &&
5390                             (!(vport->fc_flag & FC_PT2PT))) {
5391                                 if (ndlp->nlp_state ==  NLP_STE_PLOGI_ISSUE ||
5392                                     ndlp->nlp_state ==
5393                                      NLP_STE_REG_LOGIN_ISSUE) {
5394                                         lpfc_printf_vlog(vport, KERN_INFO,
5395                                                          LOG_DISCOVERY,
5396                                                          "0314 PLOGI recov "
5397                                                          "DID x%x "
5398                                                          "Data: x%x x%x x%x\n",
5399                                                          ndlp->nlp_DID,
5400                                                          ndlp->nlp_state,
5401                                                          ndlp->nlp_rpi,
5402                                                          ndlp->nlp_flag);
5403                                         goto out_free_mbox;
5404                                 }
5405                         }
5406
5407                         /* Increment reference count to ndlp to hold the
5408                          * reference to ndlp for the callback function.
5409                          */
5410                         mbox->ctx_ndlp = lpfc_nlp_get(ndlp);
5411                         if (!mbox->ctx_ndlp)
5412                                 goto out_free_mbox;
5413
5414                         mbox->vport = vport;
5415                         if (ndlp->nlp_flag & NLP_RM_DFLT_RPI) {
5416                                 mbox->mbox_flag |= LPFC_MBX_IMED_UNREG;
5417                                 mbox->mbox_cmpl = lpfc_mbx_cmpl_dflt_rpi;
5418                         }
5419                         else {
5420                                 mbox->mbox_cmpl = lpfc_mbx_cmpl_reg_login;
5421                                 ndlp->nlp_prev_state = ndlp->nlp_state;
5422                                 lpfc_nlp_set_state(vport, ndlp,
5423                                            NLP_STE_REG_LOGIN_ISSUE);
5424                         }
5425
5426                         ndlp->nlp_flag |= NLP_REG_LOGIN_SEND;
5427                         if (lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT)
5428                             != MBX_NOT_FINISHED)
5429                                 goto out;
5430
5431                         /* Decrement the ndlp reference count we
5432                          * set for this failed mailbox command.
5433                          */
5434                         lpfc_nlp_put(ndlp);
5435                         ndlp->nlp_flag &= ~NLP_REG_LOGIN_SEND;
5436
5437                         /* ELS rsp: Cannot issue reg_login for <NPortid> */
5438                         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
5439                                 "0138 ELS rsp: Cannot issue reg_login for x%x "
5440                                 "Data: x%x x%x x%x\n",
5441                                 ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
5442                                 ndlp->nlp_rpi);
5443                 }
5444 out_free_mbox:
5445                 lpfc_mbox_rsrc_cleanup(phba, mbox, MBOX_THD_UNLOCKED);
5446         }
5447 out:
5448         if (ndlp && shost) {
5449                 spin_lock_irq(&ndlp->lock);
5450                 if (mbox)
5451                         ndlp->nlp_flag &= ~NLP_ACC_REGLOGIN;
5452                 ndlp->nlp_flag &= ~NLP_RM_DFLT_RPI;
5453                 spin_unlock_irq(&ndlp->lock);
5454         }
5455
5456         /* An SLI4 NPIV instance wants to drop the node at this point under
5457          * these conditions and release the RPI.
5458          */
5459         if (phba->sli_rev == LPFC_SLI_REV4 &&
5460             vport && vport->port_type == LPFC_NPIV_PORT &&
5461             !(ndlp->fc4_xpt_flags & SCSI_XPT_REGD)) {
5462                 if (ndlp->nlp_flag & NLP_RELEASE_RPI) {
5463                         if (ndlp->nlp_state != NLP_STE_PLOGI_ISSUE &&
5464                             ndlp->nlp_state != NLP_STE_REG_LOGIN_ISSUE) {
5465                                 lpfc_sli4_free_rpi(phba, ndlp->nlp_rpi);
5466                                 spin_lock_irq(&ndlp->lock);
5467                                 ndlp->nlp_rpi = LPFC_RPI_ALLOC_ERROR;
5468                                 ndlp->nlp_flag &= ~NLP_RELEASE_RPI;
5469                                 spin_unlock_irq(&ndlp->lock);
5470                         }
5471                 }
5472
5473                 lpfc_drop_node(vport, ndlp);
5474         }
5475
5476         /* Release the originating I/O reference. */
5477         lpfc_els_free_iocb(phba, cmdiocb);
5478         lpfc_nlp_put(ndlp);
5479         return;
5480 }
5481
5482 /**
5483  * lpfc_els_rsp_acc - Prepare and issue an acc response iocb command
5484  * @vport: pointer to a host virtual N_Port data structure.
5485  * @flag: the els command code to be accepted.
5486  * @oldiocb: pointer to the original lpfc command iocb data structure.
5487  * @ndlp: pointer to a node-list data structure.
5488  * @mbox: pointer to the driver internal queue element for mailbox command.
5489  *
5490  * This routine prepares and issues an Accept (ACC) response IOCB
5491  * command. It uses the @flag to properly set up the IOCB field for the
5492  * specific ACC response command to be issued and invokes the
5493  * lpfc_sli_issue_iocb() routine to send out ACC response IOCB. If a
5494  * @mbox pointer is passed in, it will be put into the context_un.mbox
5495  * field of the IOCB for the completion callback function to issue the
5496  * mailbox command to the HBA later when callback is invoked.
5497  *
5498  * Note that the ndlp reference count will be incremented by 1 for holding the
5499  * ndlp and the reference to ndlp will be stored into the ndlp field of
5500  * the IOCB for the completion callback function to the corresponding
5501  * response ELS IOCB command.
5502  *
5503  * Return code
5504  *   0 - Successfully issued acc response
5505  *   1 - Failed to issue acc response
5506  **/
5507 int
5508 lpfc_els_rsp_acc(struct lpfc_vport *vport, uint32_t flag,
5509                  struct lpfc_iocbq *oldiocb, struct lpfc_nodelist *ndlp,
5510                  LPFC_MBOXQ_t *mbox)
5511 {
5512         struct lpfc_hba  *phba = vport->phba;
5513         IOCB_t *icmd;
5514         IOCB_t *oldcmd;
5515         union lpfc_wqe128 *wqe;
5516         union lpfc_wqe128 *oldwqe = &oldiocb->wqe;
5517         struct lpfc_iocbq *elsiocb;
5518         uint8_t *pcmd;
5519         struct serv_parm *sp;
5520         uint16_t cmdsize;
5521         int rc;
5522         ELS_PKT *els_pkt_ptr;
5523         struct fc_els_rdf_resp *rdf_resp;
5524
5525         switch (flag) {
5526         case ELS_CMD_ACC:
5527                 cmdsize = sizeof(uint32_t);
5528                 elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, oldiocb->retry,
5529                                              ndlp, ndlp->nlp_DID, ELS_CMD_ACC);
5530                 if (!elsiocb) {
5531                         spin_lock_irq(&ndlp->lock);
5532                         ndlp->nlp_flag &= ~NLP_LOGO_ACC;
5533                         spin_unlock_irq(&ndlp->lock);
5534                         return 1;
5535                 }
5536
5537                 if (phba->sli_rev == LPFC_SLI_REV4) {
5538                         wqe = &elsiocb->wqe;
5539                         /* XRI / rx_id */
5540                         bf_set(wqe_ctxt_tag, &wqe->xmit_els_rsp.wqe_com,
5541                                bf_get(wqe_ctxt_tag,
5542                                       &oldwqe->xmit_els_rsp.wqe_com));
5543
5544                         /* oxid */
5545                         bf_set(wqe_rcvoxid, &wqe->xmit_els_rsp.wqe_com,
5546                                bf_get(wqe_rcvoxid,
5547                                       &oldwqe->xmit_els_rsp.wqe_com));
5548                 } else {
5549                         icmd = &elsiocb->iocb;
5550                         oldcmd = &oldiocb->iocb;
5551                         icmd->ulpContext = oldcmd->ulpContext; /* Xri / rx_id */
5552                         icmd->unsli3.rcvsli3.ox_id =
5553                                 oldcmd->unsli3.rcvsli3.ox_id;
5554                 }
5555
5556                 pcmd = elsiocb->cmd_dmabuf->virt;
5557                 *((uint32_t *) (pcmd)) = ELS_CMD_ACC;
5558                 pcmd += sizeof(uint32_t);
5559
5560                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
5561                         "Issue ACC:       did:x%x flg:x%x",
5562                         ndlp->nlp_DID, ndlp->nlp_flag, 0);
5563                 break;
5564         case ELS_CMD_FLOGI:
5565         case ELS_CMD_PLOGI:
5566                 cmdsize = (sizeof(struct serv_parm) + sizeof(uint32_t));
5567                 elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, oldiocb->retry,
5568                                              ndlp, ndlp->nlp_DID, ELS_CMD_ACC);
5569                 if (!elsiocb)
5570                         return 1;
5571
5572                 if (phba->sli_rev == LPFC_SLI_REV4) {
5573                         wqe = &elsiocb->wqe;
5574                         /* XRI / rx_id */
5575                         bf_set(wqe_ctxt_tag, &wqe->xmit_els_rsp.wqe_com,
5576                                bf_get(wqe_ctxt_tag,
5577                                       &oldwqe->xmit_els_rsp.wqe_com));
5578
5579                         /* oxid */
5580                         bf_set(wqe_rcvoxid, &wqe->xmit_els_rsp.wqe_com,
5581                                bf_get(wqe_rcvoxid,
5582                                       &oldwqe->xmit_els_rsp.wqe_com));
5583                 } else {
5584                         icmd = &elsiocb->iocb;
5585                         oldcmd = &oldiocb->iocb;
5586                         icmd->ulpContext = oldcmd->ulpContext; /* Xri / rx_id */
5587                         icmd->unsli3.rcvsli3.ox_id =
5588                                 oldcmd->unsli3.rcvsli3.ox_id;
5589                 }
5590
5591                 pcmd = (u8 *)elsiocb->cmd_dmabuf->virt;
5592
5593                 if (mbox)
5594                         elsiocb->context_un.mbox = mbox;
5595
5596                 *((uint32_t *) (pcmd)) = ELS_CMD_ACC;
5597                 pcmd += sizeof(uint32_t);
5598                 sp = (struct serv_parm *)pcmd;
5599
5600                 if (flag == ELS_CMD_FLOGI) {
5601                         /* Copy the received service parameters back */
5602                         memcpy(sp, &phba->fc_fabparam,
5603                                sizeof(struct serv_parm));
5604
5605                         /* Clear the F_Port bit */
5606                         sp->cmn.fPort = 0;
5607
5608                         /* Mark all class service parameters as invalid */
5609                         sp->cls1.classValid = 0;
5610                         sp->cls2.classValid = 0;
5611                         sp->cls3.classValid = 0;
5612                         sp->cls4.classValid = 0;
5613
5614                         /* Copy our worldwide names */
5615                         memcpy(&sp->portName, &vport->fc_sparam.portName,
5616                                sizeof(struct lpfc_name));
5617                         memcpy(&sp->nodeName, &vport->fc_sparam.nodeName,
5618                                sizeof(struct lpfc_name));
5619                 } else {
5620                         memcpy(pcmd, &vport->fc_sparam,
5621                                sizeof(struct serv_parm));
5622
5623                         sp->cmn.valid_vendor_ver_level = 0;
5624                         memset(sp->un.vendorVersion, 0,
5625                                sizeof(sp->un.vendorVersion));
5626                         sp->cmn.bbRcvSizeMsb &= 0xF;
5627
5628                         /* If our firmware supports this feature, convey that
5629                          * info to the target using the vendor specific field.
5630                          */
5631                         if (phba->sli.sli_flag & LPFC_SLI_SUPPRESS_RSP) {
5632                                 sp->cmn.valid_vendor_ver_level = 1;
5633                                 sp->un.vv.vid = cpu_to_be32(LPFC_VV_EMLX_ID);
5634                                 sp->un.vv.flags =
5635                                         cpu_to_be32(LPFC_VV_SUPPRESS_RSP);
5636                         }
5637                 }
5638
5639                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
5640                         "Issue ACC FLOGI/PLOGI: did:x%x flg:x%x",
5641                         ndlp->nlp_DID, ndlp->nlp_flag, 0);
5642                 break;
5643         case ELS_CMD_PRLO:
5644                 cmdsize = sizeof(uint32_t) + sizeof(PRLO);
5645                 elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, oldiocb->retry,
5646                                              ndlp, ndlp->nlp_DID, ELS_CMD_PRLO);
5647                 if (!elsiocb)
5648                         return 1;
5649
5650                 if (phba->sli_rev == LPFC_SLI_REV4) {
5651                         wqe = &elsiocb->wqe;
5652                         /* XRI / rx_id */
5653                         bf_set(wqe_ctxt_tag, &wqe->xmit_els_rsp.wqe_com,
5654                                bf_get(wqe_ctxt_tag,
5655                                       &oldwqe->xmit_els_rsp.wqe_com));
5656
5657                         /* oxid */
5658                         bf_set(wqe_rcvoxid, &wqe->xmit_els_rsp.wqe_com,
5659                                bf_get(wqe_rcvoxid,
5660                                       &oldwqe->xmit_els_rsp.wqe_com));
5661                 } else {
5662                         icmd = &elsiocb->iocb;
5663                         oldcmd = &oldiocb->iocb;
5664                         icmd->ulpContext = oldcmd->ulpContext; /* Xri / rx_id */
5665                         icmd->unsli3.rcvsli3.ox_id =
5666                                 oldcmd->unsli3.rcvsli3.ox_id;
5667                 }
5668
5669                 pcmd = (u8 *) elsiocb->cmd_dmabuf->virt;
5670
5671                 memcpy(pcmd, oldiocb->cmd_dmabuf->virt,
5672                        sizeof(uint32_t) + sizeof(PRLO));
5673                 *((uint32_t *) (pcmd)) = ELS_CMD_PRLO_ACC;
5674                 els_pkt_ptr = (ELS_PKT *) pcmd;
5675                 els_pkt_ptr->un.prlo.acceptRspCode = PRLO_REQ_EXECUTED;
5676
5677                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
5678                         "Issue ACC PRLO:  did:x%x flg:x%x",
5679                         ndlp->nlp_DID, ndlp->nlp_flag, 0);
5680                 break;
5681         case ELS_CMD_RDF:
5682                 cmdsize = sizeof(*rdf_resp);
5683                 elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, oldiocb->retry,
5684                                              ndlp, ndlp->nlp_DID, ELS_CMD_ACC);
5685                 if (!elsiocb)
5686                         return 1;
5687
5688                 if (phba->sli_rev == LPFC_SLI_REV4) {
5689                         wqe = &elsiocb->wqe;
5690                         /* XRI / rx_id */
5691                         bf_set(wqe_ctxt_tag, &wqe->xmit_els_rsp.wqe_com,
5692                                bf_get(wqe_ctxt_tag,
5693                                       &oldwqe->xmit_els_rsp.wqe_com));
5694
5695                         /* oxid */
5696                         bf_set(wqe_rcvoxid, &wqe->xmit_els_rsp.wqe_com,
5697                                bf_get(wqe_rcvoxid,
5698                                       &oldwqe->xmit_els_rsp.wqe_com));
5699                 } else {
5700                         icmd = &elsiocb->iocb;
5701                         oldcmd = &oldiocb->iocb;
5702                         icmd->ulpContext = oldcmd->ulpContext; /* Xri / rx_id */
5703                         icmd->unsli3.rcvsli3.ox_id =
5704                                 oldcmd->unsli3.rcvsli3.ox_id;
5705                 }
5706
5707                 pcmd = (u8 *)elsiocb->cmd_dmabuf->virt;
5708                 rdf_resp = (struct fc_els_rdf_resp *)pcmd;
5709                 memset(rdf_resp, 0, sizeof(*rdf_resp));
5710                 rdf_resp->acc_hdr.la_cmd = ELS_LS_ACC;
5711
5712                 /* FC-LS-5 specifies desc_list_len shall be set to 12 */
5713                 rdf_resp->desc_list_len = cpu_to_be32(12);
5714
5715                 /* FC-LS-5 specifies LS REQ Information descriptor */
5716                 rdf_resp->lsri.desc_tag = cpu_to_be32(1);
5717                 rdf_resp->lsri.desc_len = cpu_to_be32(sizeof(u32));
5718                 rdf_resp->lsri.rqst_w0.cmd = ELS_RDF;
5719                 break;
5720         default:
5721                 return 1;
5722         }
5723         if (ndlp->nlp_flag & NLP_LOGO_ACC) {
5724                 spin_lock_irq(&ndlp->lock);
5725                 if (!(ndlp->nlp_flag & NLP_RPI_REGISTERED ||
5726                         ndlp->nlp_flag & NLP_REG_LOGIN_SEND))
5727                         ndlp->nlp_flag &= ~NLP_LOGO_ACC;
5728                 spin_unlock_irq(&ndlp->lock);
5729                 elsiocb->cmd_cmpl = lpfc_cmpl_els_logo_acc;
5730         } else {
5731                 elsiocb->cmd_cmpl = lpfc_cmpl_els_rsp;
5732         }
5733
5734         phba->fc_stat.elsXmitACC++;
5735         elsiocb->ndlp = lpfc_nlp_get(ndlp);
5736         if (!elsiocb->ndlp) {
5737                 lpfc_els_free_iocb(phba, elsiocb);
5738                 return 1;
5739         }
5740
5741         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
5742         if (rc == IOCB_ERROR) {
5743                 lpfc_els_free_iocb(phba, elsiocb);
5744                 lpfc_nlp_put(ndlp);
5745                 return 1;
5746         }
5747
5748         /* Xmit ELS ACC response tag <ulpIoTag> */
5749         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
5750                          "0128 Xmit ELS ACC response Status: x%x, IoTag: x%x, "
5751                          "XRI: x%x, DID: x%x, nlp_flag: x%x nlp_state: x%x "
5752                          "RPI: x%x, fc_flag x%x refcnt %d\n",
5753                          rc, elsiocb->iotag, elsiocb->sli4_xritag,
5754                          ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
5755                          ndlp->nlp_rpi, vport->fc_flag, kref_read(&ndlp->kref));
5756         return 0;
5757 }
5758
5759 /**
5760  * lpfc_els_rsp_reject - Prepare and issue a rjt response iocb command
5761  * @vport: pointer to a virtual N_Port data structure.
5762  * @rejectError: reject response to issue
5763  * @oldiocb: pointer to the original lpfc command iocb data structure.
5764  * @ndlp: pointer to a node-list data structure.
5765  * @mbox: pointer to the driver internal queue element for mailbox command.
5766  *
5767  * This routine prepares and issue an Reject (RJT) response IOCB
5768  * command. If a @mbox pointer is passed in, it will be put into the
5769  * context_un.mbox field of the IOCB for the completion callback function
5770  * to issue to the HBA later.
5771  *
5772  * Note that the ndlp reference count will be incremented by 1 for holding the
5773  * ndlp and the reference to ndlp will be stored into the ndlp field of
5774  * the IOCB for the completion callback function to the reject response
5775  * ELS IOCB command.
5776  *
5777  * Return code
5778  *   0 - Successfully issued reject response
5779  *   1 - Failed to issue reject response
5780  **/
5781 int
5782 lpfc_els_rsp_reject(struct lpfc_vport *vport, uint32_t rejectError,
5783                     struct lpfc_iocbq *oldiocb, struct lpfc_nodelist *ndlp,
5784                     LPFC_MBOXQ_t *mbox)
5785 {
5786         int rc;
5787         struct lpfc_hba  *phba = vport->phba;
5788         IOCB_t *icmd;
5789         IOCB_t *oldcmd;
5790         union lpfc_wqe128 *wqe;
5791         struct lpfc_iocbq *elsiocb;
5792         uint8_t *pcmd;
5793         uint16_t cmdsize;
5794
5795         cmdsize = 2 * sizeof(uint32_t);
5796         elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, oldiocb->retry, ndlp,
5797                                      ndlp->nlp_DID, ELS_CMD_LS_RJT);
5798         if (!elsiocb)
5799                 return 1;
5800
5801         if (phba->sli_rev == LPFC_SLI_REV4) {
5802                 wqe = &elsiocb->wqe;
5803                 bf_set(wqe_ctxt_tag, &wqe->generic.wqe_com,
5804                        get_job_ulpcontext(phba, oldiocb)); /* Xri / rx_id */
5805                 bf_set(wqe_rcvoxid, &wqe->xmit_els_rsp.wqe_com,
5806                        get_job_rcvoxid(phba, oldiocb));
5807         } else {
5808                 icmd = &elsiocb->iocb;
5809                 oldcmd = &oldiocb->iocb;
5810                 icmd->ulpContext = oldcmd->ulpContext; /* Xri / rx_id */
5811                 icmd->unsli3.rcvsli3.ox_id = oldcmd->unsli3.rcvsli3.ox_id;
5812         }
5813
5814         pcmd = (uint8_t *)elsiocb->cmd_dmabuf->virt;
5815
5816         *((uint32_t *) (pcmd)) = ELS_CMD_LS_RJT;
5817         pcmd += sizeof(uint32_t);
5818         *((uint32_t *) (pcmd)) = rejectError;
5819
5820         if (mbox)
5821                 elsiocb->context_un.mbox = mbox;
5822
5823         /* Xmit ELS RJT <err> response tag <ulpIoTag> */
5824         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
5825                          "0129 Xmit ELS RJT x%x response tag x%x "
5826                          "xri x%x, did x%x, nlp_flag x%x, nlp_state x%x, "
5827                          "rpi x%x\n",
5828                          rejectError, elsiocb->iotag,
5829                          get_job_ulpcontext(phba, elsiocb), ndlp->nlp_DID,
5830                          ndlp->nlp_flag, ndlp->nlp_state, ndlp->nlp_rpi);
5831         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
5832                 "Issue LS_RJT:    did:x%x flg:x%x err:x%x",
5833                 ndlp->nlp_DID, ndlp->nlp_flag, rejectError);
5834
5835         phba->fc_stat.elsXmitLSRJT++;
5836         elsiocb->cmd_cmpl = lpfc_cmpl_els_rsp;
5837         elsiocb->ndlp = lpfc_nlp_get(ndlp);
5838         if (!elsiocb->ndlp) {
5839                 lpfc_els_free_iocb(phba, elsiocb);
5840                 return 1;
5841         }
5842
5843         /* The NPIV instance is rejecting this unsolicited ELS. Make sure the
5844          * node's assigned RPI gets released provided this node is not already
5845          * registered with the transport.
5846          */
5847         if (phba->sli_rev == LPFC_SLI_REV4 &&
5848             vport->port_type == LPFC_NPIV_PORT &&
5849             !(ndlp->fc4_xpt_flags & SCSI_XPT_REGD)) {
5850                 spin_lock_irq(&ndlp->lock);
5851                 ndlp->nlp_flag |= NLP_RELEASE_RPI;
5852                 spin_unlock_irq(&ndlp->lock);
5853         }
5854
5855         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
5856         if (rc == IOCB_ERROR) {
5857                 lpfc_els_free_iocb(phba, elsiocb);
5858                 lpfc_nlp_put(ndlp);
5859                 return 1;
5860         }
5861
5862         return 0;
5863 }
5864
5865  /**
5866   * lpfc_issue_els_edc_rsp - Exchange Diagnostic Capabilities with the fabric.
5867   * @vport: pointer to a host virtual N_Port data structure.
5868   * @cmdiocb: pointer to the original lpfc command iocb data structure.
5869   * @ndlp: NPort to where rsp is directed
5870   *
5871   * This routine issues an EDC ACC RSP to the F-Port Controller to communicate
5872   * this N_Port's support of hardware signals in its Congestion
5873   * Capabilities Descriptor.
5874   *
5875   * Return code
5876   *   0 - Successfully issued edc rsp command
5877   *   1 - Failed to issue edc rsp command
5878   **/
5879 static int
5880 lpfc_issue_els_edc_rsp(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
5881                        struct lpfc_nodelist *ndlp)
5882 {
5883         struct lpfc_hba  *phba = vport->phba;
5884         struct fc_els_edc_resp *edc_rsp;
5885         struct fc_tlv_desc *tlv;
5886         struct lpfc_iocbq *elsiocb;
5887         IOCB_t *icmd, *cmd;
5888         union lpfc_wqe128 *wqe;
5889         u32 cgn_desc_size, lft_desc_size;
5890         u16 cmdsize;
5891         uint8_t *pcmd;
5892         int rc;
5893
5894         cmdsize = sizeof(struct fc_els_edc_resp);
5895         cgn_desc_size = sizeof(struct fc_diag_cg_sig_desc);
5896         lft_desc_size = (lpfc_link_is_lds_capable(phba)) ?
5897                                 sizeof(struct fc_diag_lnkflt_desc) : 0;
5898         cmdsize += cgn_desc_size + lft_desc_size;
5899         elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, cmdiocb->retry,
5900                                      ndlp, ndlp->nlp_DID, ELS_CMD_ACC);
5901         if (!elsiocb)
5902                 return 1;
5903
5904         if (phba->sli_rev == LPFC_SLI_REV4) {
5905                 wqe = &elsiocb->wqe;
5906                 bf_set(wqe_ctxt_tag, &wqe->generic.wqe_com,
5907                        get_job_ulpcontext(phba, cmdiocb)); /* Xri / rx_id */
5908                 bf_set(wqe_rcvoxid, &wqe->xmit_els_rsp.wqe_com,
5909                        get_job_rcvoxid(phba, cmdiocb));
5910         } else {
5911                 icmd = &elsiocb->iocb;
5912                 cmd = &cmdiocb->iocb;
5913                 icmd->ulpContext = cmd->ulpContext; /* Xri / rx_id */
5914                 icmd->unsli3.rcvsli3.ox_id = cmd->unsli3.rcvsli3.ox_id;
5915         }
5916
5917         pcmd = elsiocb->cmd_dmabuf->virt;
5918         memset(pcmd, 0, cmdsize);
5919
5920         edc_rsp = (struct fc_els_edc_resp *)pcmd;
5921         edc_rsp->acc_hdr.la_cmd = ELS_LS_ACC;
5922         edc_rsp->desc_list_len = cpu_to_be32(sizeof(struct fc_els_lsri_desc) +
5923                                                 cgn_desc_size + lft_desc_size);
5924         edc_rsp->lsri.desc_tag = cpu_to_be32(ELS_DTAG_LS_REQ_INFO);
5925         edc_rsp->lsri.desc_len = cpu_to_be32(
5926                 FC_TLV_DESC_LENGTH_FROM_SZ(struct fc_els_lsri_desc));
5927         edc_rsp->lsri.rqst_w0.cmd = ELS_EDC;
5928         tlv = edc_rsp->desc;
5929         lpfc_format_edc_cgn_desc(phba, tlv);
5930         tlv = fc_tlv_next_desc(tlv);
5931         if (lft_desc_size)
5932                 lpfc_format_edc_lft_desc(phba, tlv);
5933
5934         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
5935                               "Issue EDC ACC:      did:x%x flg:x%x refcnt %d",
5936                               ndlp->nlp_DID, ndlp->nlp_flag,
5937                               kref_read(&ndlp->kref));
5938         elsiocb->cmd_cmpl = lpfc_cmpl_els_rsp;
5939
5940         phba->fc_stat.elsXmitACC++;
5941         elsiocb->ndlp = lpfc_nlp_get(ndlp);
5942         if (!elsiocb->ndlp) {
5943                 lpfc_els_free_iocb(phba, elsiocb);
5944                 return 1;
5945         }
5946
5947         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
5948         if (rc == IOCB_ERROR) {
5949                 lpfc_els_free_iocb(phba, elsiocb);
5950                 lpfc_nlp_put(ndlp);
5951                 return 1;
5952         }
5953
5954         /* Xmit ELS ACC response tag <ulpIoTag> */
5955         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
5956                          "0152 Xmit EDC ACC response Status: x%x, IoTag: x%x, "
5957                          "XRI: x%x, DID: x%x, nlp_flag: x%x nlp_state: x%x "
5958                          "RPI: x%x, fc_flag x%x\n",
5959                          rc, elsiocb->iotag, elsiocb->sli4_xritag,
5960                          ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
5961                          ndlp->nlp_rpi, vport->fc_flag);
5962
5963         return 0;
5964 }
5965
5966 /**
5967  * lpfc_els_rsp_adisc_acc - Prepare and issue acc response to adisc iocb cmd
5968  * @vport: pointer to a virtual N_Port data structure.
5969  * @oldiocb: pointer to the original lpfc command iocb data structure.
5970  * @ndlp: pointer to a node-list data structure.
5971  *
5972  * This routine prepares and issues an Accept (ACC) response to Address
5973  * Discover (ADISC) ELS command. It simply prepares the payload of the IOCB
5974  * and invokes the lpfc_sli_issue_iocb() routine to send out the command.
5975  *
5976  * Note that the ndlp reference count will be incremented by 1 for holding the
5977  * ndlp and the reference to ndlp will be stored into the ndlp field of
5978  * the IOCB for the completion callback function to the ADISC Accept response
5979  * ELS IOCB command.
5980  *
5981  * Return code
5982  *   0 - Successfully issued acc adisc response
5983  *   1 - Failed to issue adisc acc response
5984  **/
5985 int
5986 lpfc_els_rsp_adisc_acc(struct lpfc_vport *vport, struct lpfc_iocbq *oldiocb,
5987                        struct lpfc_nodelist *ndlp)
5988 {
5989         struct lpfc_hba  *phba = vport->phba;
5990         ADISC *ap;
5991         IOCB_t *icmd, *oldcmd;
5992         union lpfc_wqe128 *wqe;
5993         struct lpfc_iocbq *elsiocb;
5994         uint8_t *pcmd;
5995         uint16_t cmdsize;
5996         int rc;
5997         u32 ulp_context;
5998
5999         cmdsize = sizeof(uint32_t) + sizeof(ADISC);
6000         elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, oldiocb->retry, ndlp,
6001                                      ndlp->nlp_DID, ELS_CMD_ACC);
6002         if (!elsiocb)
6003                 return 1;
6004
6005         if (phba->sli_rev == LPFC_SLI_REV4) {
6006                 wqe = &elsiocb->wqe;
6007                 /* XRI / rx_id */
6008                 bf_set(wqe_ctxt_tag, &wqe->generic.wqe_com,
6009                        get_job_ulpcontext(phba, oldiocb));
6010                 ulp_context = get_job_ulpcontext(phba, elsiocb);
6011                 /* oxid */
6012                 bf_set(wqe_rcvoxid, &wqe->xmit_els_rsp.wqe_com,
6013                        get_job_rcvoxid(phba, oldiocb));
6014         } else {
6015                 icmd = &elsiocb->iocb;
6016                 oldcmd = &oldiocb->iocb;
6017                 icmd->ulpContext = oldcmd->ulpContext; /* Xri / rx_id */
6018                 ulp_context = elsiocb->iocb.ulpContext;
6019                 icmd->unsli3.rcvsli3.ox_id =
6020                         oldcmd->unsli3.rcvsli3.ox_id;
6021         }
6022
6023         /* Xmit ADISC ACC response tag <ulpIoTag> */
6024         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
6025                          "0130 Xmit ADISC ACC response iotag x%x xri: "
6026                          "x%x, did x%x, nlp_flag x%x, nlp_state x%x rpi x%x\n",
6027                          elsiocb->iotag, ulp_context,
6028                          ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
6029                          ndlp->nlp_rpi);
6030         pcmd = (uint8_t *)elsiocb->cmd_dmabuf->virt;
6031
6032         *((uint32_t *) (pcmd)) = ELS_CMD_ACC;
6033         pcmd += sizeof(uint32_t);
6034
6035         ap = (ADISC *) (pcmd);
6036         ap->hardAL_PA = phba->fc_pref_ALPA;
6037         memcpy(&ap->portName, &vport->fc_portname, sizeof(struct lpfc_name));
6038         memcpy(&ap->nodeName, &vport->fc_nodename, sizeof(struct lpfc_name));
6039         ap->DID = be32_to_cpu(vport->fc_myDID);
6040
6041         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
6042                       "Issue ACC ADISC: did:x%x flg:x%x refcnt %d",
6043                       ndlp->nlp_DID, ndlp->nlp_flag, kref_read(&ndlp->kref));
6044
6045         phba->fc_stat.elsXmitACC++;
6046         elsiocb->cmd_cmpl = lpfc_cmpl_els_rsp;
6047         elsiocb->ndlp = lpfc_nlp_get(ndlp);
6048         if (!elsiocb->ndlp) {
6049                 lpfc_els_free_iocb(phba, elsiocb);
6050                 return 1;
6051         }
6052
6053         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
6054         if (rc == IOCB_ERROR) {
6055                 lpfc_els_free_iocb(phba, elsiocb);
6056                 lpfc_nlp_put(ndlp);
6057                 return 1;
6058         }
6059
6060         return 0;
6061 }
6062
6063 /**
6064  * lpfc_els_rsp_prli_acc - Prepare and issue acc response to prli iocb cmd
6065  * @vport: pointer to a virtual N_Port data structure.
6066  * @oldiocb: pointer to the original lpfc command iocb data structure.
6067  * @ndlp: pointer to a node-list data structure.
6068  *
6069  * This routine prepares and issues an Accept (ACC) response to Process
6070  * Login (PRLI) ELS command. It simply prepares the payload of the IOCB
6071  * and invokes the lpfc_sli_issue_iocb() routine to send out the command.
6072  *
6073  * Note that the ndlp reference count will be incremented by 1 for holding the
6074  * ndlp and the reference to ndlp will be stored into the ndlp field of
6075  * the IOCB for the completion callback function to the PRLI Accept response
6076  * ELS IOCB command.
6077  *
6078  * Return code
6079  *   0 - Successfully issued acc prli response
6080  *   1 - Failed to issue acc prli response
6081  **/
6082 int
6083 lpfc_els_rsp_prli_acc(struct lpfc_vport *vport, struct lpfc_iocbq *oldiocb,
6084                       struct lpfc_nodelist *ndlp)
6085 {
6086         struct lpfc_hba  *phba = vport->phba;
6087         PRLI *npr;
6088         struct lpfc_nvme_prli *npr_nvme;
6089         lpfc_vpd_t *vpd;
6090         IOCB_t *icmd;
6091         IOCB_t *oldcmd;
6092         union lpfc_wqe128 *wqe;
6093         struct lpfc_iocbq *elsiocb;
6094         uint8_t *pcmd;
6095         uint16_t cmdsize;
6096         uint32_t prli_fc4_req, *req_payload;
6097         struct lpfc_dmabuf *req_buf;
6098         int rc;
6099         u32 elsrspcmd, ulp_context;
6100
6101         /* Need the incoming PRLI payload to determine if the ACC is for an
6102          * FC4 or NVME PRLI type.  The PRLI type is at word 1.
6103          */
6104         req_buf = oldiocb->cmd_dmabuf;
6105         req_payload = (((uint32_t *)req_buf->virt) + 1);
6106
6107         /* PRLI type payload is at byte 3 for FCP or NVME. */
6108         prli_fc4_req = be32_to_cpu(*req_payload);
6109         prli_fc4_req = (prli_fc4_req >> 24) & 0xff;
6110         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
6111                          "6127 PRLI_ACC:  Req Type x%x, Word1 x%08x\n",
6112                          prli_fc4_req, *((uint32_t *)req_payload));
6113
6114         if (prli_fc4_req == PRLI_FCP_TYPE) {
6115                 cmdsize = sizeof(uint32_t) + sizeof(PRLI);
6116                 elsrspcmd = (ELS_CMD_ACC | (ELS_CMD_PRLI & ~ELS_RSP_MASK));
6117         } else if (prli_fc4_req == PRLI_NVME_TYPE) {
6118                 cmdsize = sizeof(uint32_t) + sizeof(struct lpfc_nvme_prli);
6119                 elsrspcmd = (ELS_CMD_ACC | (ELS_CMD_NVMEPRLI & ~ELS_RSP_MASK));
6120         } else {
6121                 return 1;
6122         }
6123
6124         elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, oldiocb->retry, ndlp,
6125                                      ndlp->nlp_DID, elsrspcmd);
6126         if (!elsiocb)
6127                 return 1;
6128
6129         if (phba->sli_rev == LPFC_SLI_REV4) {
6130                 wqe = &elsiocb->wqe;
6131                 bf_set(wqe_ctxt_tag, &wqe->generic.wqe_com,
6132                        get_job_ulpcontext(phba, oldiocb)); /* Xri / rx_id */
6133                 ulp_context = get_job_ulpcontext(phba, elsiocb);
6134                 bf_set(wqe_rcvoxid, &wqe->xmit_els_rsp.wqe_com,
6135                        get_job_rcvoxid(phba, oldiocb));
6136         } else {
6137                 icmd = &elsiocb->iocb;
6138                 oldcmd = &oldiocb->iocb;
6139                 icmd->ulpContext = oldcmd->ulpContext; /* Xri / rx_id */
6140                 ulp_context = elsiocb->iocb.ulpContext;
6141                 icmd->unsli3.rcvsli3.ox_id =
6142                         oldcmd->unsli3.rcvsli3.ox_id;
6143         }
6144
6145         /* Xmit PRLI ACC response tag <ulpIoTag> */
6146         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
6147                          "0131 Xmit PRLI ACC response tag x%x xri x%x, "
6148                          "did x%x, nlp_flag x%x, nlp_state x%x, rpi x%x\n",
6149                          elsiocb->iotag, ulp_context,
6150                          ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
6151                          ndlp->nlp_rpi);
6152         pcmd = (uint8_t *)elsiocb->cmd_dmabuf->virt;
6153         memset(pcmd, 0, cmdsize);
6154
6155         *((uint32_t *)(pcmd)) = elsrspcmd;
6156         pcmd += sizeof(uint32_t);
6157
6158         /* For PRLI, remainder of payload is PRLI parameter page */
6159         vpd = &phba->vpd;
6160
6161         if (prli_fc4_req == PRLI_FCP_TYPE) {
6162                 /*
6163                  * If the remote port is a target and our firmware version
6164                  * is 3.20 or later, set the following bits for FC-TAPE
6165                  * support.
6166                  */
6167                 npr = (PRLI *) pcmd;
6168                 if ((ndlp->nlp_type & NLP_FCP_TARGET) &&
6169                     (vpd->rev.feaLevelHigh >= 0x02)) {
6170                         npr->ConfmComplAllowed = 1;
6171                         npr->Retry = 1;
6172                         npr->TaskRetryIdReq = 1;
6173                 }
6174                 npr->acceptRspCode = PRLI_REQ_EXECUTED;
6175                 npr->estabImagePair = 1;
6176                 npr->readXferRdyDis = 1;
6177                 npr->ConfmComplAllowed = 1;
6178                 npr->prliType = PRLI_FCP_TYPE;
6179                 npr->initiatorFunc = 1;
6180         } else if (prli_fc4_req == PRLI_NVME_TYPE) {
6181                 /* Respond with an NVME PRLI Type */
6182                 npr_nvme = (struct lpfc_nvme_prli *) pcmd;
6183                 bf_set(prli_type_code, npr_nvme, PRLI_NVME_TYPE);
6184                 bf_set(prli_estabImagePair, npr_nvme, 0);  /* Should be 0 */
6185                 bf_set(prli_acc_rsp_code, npr_nvme, PRLI_REQ_EXECUTED);
6186                 if (phba->nvmet_support) {
6187                         bf_set(prli_tgt, npr_nvme, 1);
6188                         bf_set(prli_disc, npr_nvme, 1);
6189                         if (phba->cfg_nvme_enable_fb) {
6190                                 bf_set(prli_fba, npr_nvme, 1);
6191
6192                                 /* TBD.  Target mode needs to post buffers
6193                                  * that support the configured first burst
6194                                  * byte size.
6195                                  */
6196                                 bf_set(prli_fb_sz, npr_nvme,
6197                                        phba->cfg_nvmet_fb_size);
6198                         }
6199                 } else {
6200                         bf_set(prli_init, npr_nvme, 1);
6201                 }
6202
6203                 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC,
6204                                  "6015 NVME issue PRLI ACC word1 x%08x "
6205                                  "word4 x%08x word5 x%08x flag x%x, "
6206                                  "fcp_info x%x nlp_type x%x\n",
6207                                  npr_nvme->word1, npr_nvme->word4,
6208                                  npr_nvme->word5, ndlp->nlp_flag,
6209                                  ndlp->nlp_fcp_info, ndlp->nlp_type);
6210                 npr_nvme->word1 = cpu_to_be32(npr_nvme->word1);
6211                 npr_nvme->word4 = cpu_to_be32(npr_nvme->word4);
6212                 npr_nvme->word5 = cpu_to_be32(npr_nvme->word5);
6213         } else
6214                 lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
6215                                  "6128 Unknown FC_TYPE x%x x%x ndlp x%06x\n",
6216                                  prli_fc4_req, ndlp->nlp_fc4_type,
6217                                  ndlp->nlp_DID);
6218
6219         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
6220                       "Issue ACC PRLI:  did:x%x flg:x%x",
6221                       ndlp->nlp_DID, ndlp->nlp_flag, kref_read(&ndlp->kref));
6222
6223         phba->fc_stat.elsXmitACC++;
6224         elsiocb->cmd_cmpl = lpfc_cmpl_els_rsp;
6225         elsiocb->ndlp =  lpfc_nlp_get(ndlp);
6226         if (!elsiocb->ndlp) {
6227                 lpfc_els_free_iocb(phba, elsiocb);
6228                 return 1;
6229         }
6230
6231         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
6232         if (rc == IOCB_ERROR) {
6233                 lpfc_els_free_iocb(phba, elsiocb);
6234                 lpfc_nlp_put(ndlp);
6235                 return 1;
6236         }
6237
6238         return 0;
6239 }
6240
6241 /**
6242  * lpfc_els_rsp_rnid_acc - Issue rnid acc response iocb command
6243  * @vport: pointer to a virtual N_Port data structure.
6244  * @format: rnid command format.
6245  * @oldiocb: pointer to the original lpfc command iocb data structure.
6246  * @ndlp: pointer to a node-list data structure.
6247  *
6248  * This routine issues a Request Node Identification Data (RNID) Accept
6249  * (ACC) response. It constructs the RNID ACC response command according to
6250  * the proper @format and then calls the lpfc_sli_issue_iocb() routine to
6251  * issue the response.
6252  *
6253  * Note that the ndlp reference count will be incremented by 1 for holding the
6254  * ndlp and the reference to ndlp will be stored into the ndlp field of
6255  * the IOCB for the completion callback function.
6256  *
6257  * Return code
6258  *   0 - Successfully issued acc rnid response
6259  *   1 - Failed to issue acc rnid response
6260  **/
6261 static int
6262 lpfc_els_rsp_rnid_acc(struct lpfc_vport *vport, uint8_t format,
6263                       struct lpfc_iocbq *oldiocb, struct lpfc_nodelist *ndlp)
6264 {
6265         struct lpfc_hba  *phba = vport->phba;
6266         RNID *rn;
6267         IOCB_t *icmd, *oldcmd;
6268         union lpfc_wqe128 *wqe;
6269         struct lpfc_iocbq *elsiocb;
6270         uint8_t *pcmd;
6271         uint16_t cmdsize;
6272         int rc;
6273         u32 ulp_context;
6274
6275         cmdsize = sizeof(uint32_t) + sizeof(uint32_t)
6276                                         + (2 * sizeof(struct lpfc_name));
6277         if (format)
6278                 cmdsize += sizeof(RNID_TOP_DISC);
6279
6280         elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, oldiocb->retry, ndlp,
6281                                      ndlp->nlp_DID, ELS_CMD_ACC);
6282         if (!elsiocb)
6283                 return 1;
6284
6285         if (phba->sli_rev == LPFC_SLI_REV4) {
6286                 wqe = &elsiocb->wqe;
6287                 bf_set(wqe_ctxt_tag, &wqe->generic.wqe_com,
6288                        get_job_ulpcontext(phba, oldiocb)); /* Xri / rx_id */
6289                 ulp_context = get_job_ulpcontext(phba, elsiocb);
6290                 bf_set(wqe_rcvoxid, &wqe->xmit_els_rsp.wqe_com,
6291                        get_job_rcvoxid(phba, oldiocb));
6292         } else {
6293                 icmd = &elsiocb->iocb;
6294                 oldcmd = &oldiocb->iocb;
6295                 icmd->ulpContext = oldcmd->ulpContext; /* Xri / rx_id */
6296                 ulp_context = elsiocb->iocb.ulpContext;
6297                 icmd->unsli3.rcvsli3.ox_id =
6298                         oldcmd->unsli3.rcvsli3.ox_id;
6299         }
6300
6301         /* Xmit RNID ACC response tag <ulpIoTag> */
6302         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
6303                          "0132 Xmit RNID ACC response tag x%x xri x%x\n",
6304                          elsiocb->iotag, ulp_context);
6305         pcmd = (uint8_t *)elsiocb->cmd_dmabuf->virt;
6306         *((uint32_t *) (pcmd)) = ELS_CMD_ACC;
6307         pcmd += sizeof(uint32_t);
6308
6309         memset(pcmd, 0, sizeof(RNID));
6310         rn = (RNID *) (pcmd);
6311         rn->Format = format;
6312         rn->CommonLen = (2 * sizeof(struct lpfc_name));
6313         memcpy(&rn->portName, &vport->fc_portname, sizeof(struct lpfc_name));
6314         memcpy(&rn->nodeName, &vport->fc_nodename, sizeof(struct lpfc_name));
6315         switch (format) {
6316         case 0:
6317                 rn->SpecificLen = 0;
6318                 break;
6319         case RNID_TOPOLOGY_DISC:
6320                 rn->SpecificLen = sizeof(RNID_TOP_DISC);
6321                 memcpy(&rn->un.topologyDisc.portName,
6322                        &vport->fc_portname, sizeof(struct lpfc_name));
6323                 rn->un.topologyDisc.unitType = RNID_HBA;
6324                 rn->un.topologyDisc.physPort = 0;
6325                 rn->un.topologyDisc.attachedNodes = 0;
6326                 break;
6327         default:
6328                 rn->CommonLen = 0;
6329                 rn->SpecificLen = 0;
6330                 break;
6331         }
6332
6333         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
6334                       "Issue ACC RNID:  did:x%x flg:x%x refcnt %d",
6335                       ndlp->nlp_DID, ndlp->nlp_flag, kref_read(&ndlp->kref));
6336
6337         phba->fc_stat.elsXmitACC++;
6338         elsiocb->cmd_cmpl = lpfc_cmpl_els_rsp;
6339         elsiocb->ndlp = lpfc_nlp_get(ndlp);
6340         if (!elsiocb->ndlp) {
6341                 lpfc_els_free_iocb(phba, elsiocb);
6342                 return 1;
6343         }
6344
6345         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
6346         if (rc == IOCB_ERROR) {
6347                 lpfc_els_free_iocb(phba, elsiocb);
6348                 lpfc_nlp_put(ndlp);
6349                 return 1;
6350         }
6351
6352         return 0;
6353 }
6354
6355 /**
6356  * lpfc_els_clear_rrq - Clear the rq that this rrq describes.
6357  * @vport: pointer to a virtual N_Port data structure.
6358  * @iocb: pointer to the lpfc command iocb data structure.
6359  * @ndlp: pointer to a node-list data structure.
6360  *
6361  * Return
6362  **/
6363 static void
6364 lpfc_els_clear_rrq(struct lpfc_vport *vport,
6365                    struct lpfc_iocbq *iocb, struct lpfc_nodelist *ndlp)
6366 {
6367         struct lpfc_hba  *phba = vport->phba;
6368         uint8_t *pcmd;
6369         struct RRQ *rrq;
6370         uint16_t rxid;
6371         uint16_t xri;
6372         struct lpfc_node_rrq *prrq;
6373
6374
6375         pcmd = (uint8_t *)iocb->cmd_dmabuf->virt;
6376         pcmd += sizeof(uint32_t);
6377         rrq = (struct RRQ *)pcmd;
6378         rrq->rrq_exchg = be32_to_cpu(rrq->rrq_exchg);
6379         rxid = bf_get(rrq_rxid, rrq);
6380
6381         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
6382                         "2883 Clear RRQ for SID:x%x OXID:x%x RXID:x%x"
6383                         " x%x x%x\n",
6384                         be32_to_cpu(bf_get(rrq_did, rrq)),
6385                         bf_get(rrq_oxid, rrq),
6386                         rxid,
6387                         get_wqe_reqtag(iocb),
6388                         get_job_ulpcontext(phba, iocb));
6389
6390         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
6391                 "Clear RRQ:  did:x%x flg:x%x exchg:x%.08x",
6392                 ndlp->nlp_DID, ndlp->nlp_flag, rrq->rrq_exchg);
6393         if (vport->fc_myDID == be32_to_cpu(bf_get(rrq_did, rrq)))
6394                 xri = bf_get(rrq_oxid, rrq);
6395         else
6396                 xri = rxid;
6397         prrq = lpfc_get_active_rrq(vport, xri, ndlp->nlp_DID);
6398         if (prrq)
6399                 lpfc_clr_rrq_active(phba, xri, prrq);
6400         return;
6401 }
6402
6403 /**
6404  * lpfc_els_rsp_echo_acc - Issue echo acc response
6405  * @vport: pointer to a virtual N_Port data structure.
6406  * @data: pointer to echo data to return in the accept.
6407  * @oldiocb: pointer to the original lpfc command iocb data structure.
6408  * @ndlp: pointer to a node-list data structure.
6409  *
6410  * Return code
6411  *   0 - Successfully issued acc echo response
6412  *   1 - Failed to issue acc echo response
6413  **/
6414 static int
6415 lpfc_els_rsp_echo_acc(struct lpfc_vport *vport, uint8_t *data,
6416                       struct lpfc_iocbq *oldiocb, struct lpfc_nodelist *ndlp)
6417 {
6418         struct lpfc_hba  *phba = vport->phba;
6419         IOCB_t *icmd, *oldcmd;
6420         union lpfc_wqe128 *wqe;
6421         struct lpfc_iocbq *elsiocb;
6422         uint8_t *pcmd;
6423         uint16_t cmdsize;
6424         int rc;
6425         u32 ulp_context;
6426
6427         if (phba->sli_rev == LPFC_SLI_REV4)
6428                 cmdsize = oldiocb->wcqe_cmpl.total_data_placed;
6429         else
6430                 cmdsize = oldiocb->iocb.unsli3.rcvsli3.acc_len;
6431
6432         /* The accumulated length can exceed the BPL_SIZE.  For
6433          * now, use this as the limit
6434          */
6435         if (cmdsize > LPFC_BPL_SIZE)
6436                 cmdsize = LPFC_BPL_SIZE;
6437         elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, oldiocb->retry, ndlp,
6438                                      ndlp->nlp_DID, ELS_CMD_ACC);
6439         if (!elsiocb)
6440                 return 1;
6441
6442         if (phba->sli_rev == LPFC_SLI_REV4) {
6443                 wqe = &elsiocb->wqe;
6444                 bf_set(wqe_ctxt_tag, &wqe->generic.wqe_com,
6445                        get_job_ulpcontext(phba, oldiocb)); /* Xri / rx_id */
6446                 ulp_context = get_job_ulpcontext(phba, elsiocb);
6447                 bf_set(wqe_rcvoxid, &wqe->xmit_els_rsp.wqe_com,
6448                        get_job_rcvoxid(phba, oldiocb));
6449         } else {
6450                 icmd = &elsiocb->iocb;
6451                 oldcmd = &oldiocb->iocb;
6452                 icmd->ulpContext = oldcmd->ulpContext; /* Xri / rx_id */
6453                 ulp_context = elsiocb->iocb.ulpContext;
6454                 icmd->unsli3.rcvsli3.ox_id =
6455                         oldcmd->unsli3.rcvsli3.ox_id;
6456         }
6457
6458         /* Xmit ECHO ACC response tag <ulpIoTag> */
6459         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
6460                          "2876 Xmit ECHO ACC response tag x%x xri x%x\n",
6461                          elsiocb->iotag, ulp_context);
6462         pcmd = (uint8_t *)elsiocb->cmd_dmabuf->virt;
6463         *((uint32_t *) (pcmd)) = ELS_CMD_ACC;
6464         pcmd += sizeof(uint32_t);
6465         memcpy(pcmd, data, cmdsize - sizeof(uint32_t));
6466
6467         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
6468                       "Issue ACC ECHO:  did:x%x flg:x%x refcnt %d",
6469                       ndlp->nlp_DID, ndlp->nlp_flag, kref_read(&ndlp->kref));
6470
6471         phba->fc_stat.elsXmitACC++;
6472         elsiocb->cmd_cmpl = lpfc_cmpl_els_rsp;
6473         elsiocb->ndlp =  lpfc_nlp_get(ndlp);
6474         if (!elsiocb->ndlp) {
6475                 lpfc_els_free_iocb(phba, elsiocb);
6476                 return 1;
6477         }
6478
6479         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
6480         if (rc == IOCB_ERROR) {
6481                 lpfc_els_free_iocb(phba, elsiocb);
6482                 lpfc_nlp_put(ndlp);
6483                 return 1;
6484         }
6485
6486         return 0;
6487 }
6488
6489 /**
6490  * lpfc_els_disc_adisc - Issue remaining adisc iocbs to npr nodes of a vport
6491  * @vport: pointer to a host virtual N_Port data structure.
6492  *
6493  * This routine issues Address Discover (ADISC) ELS commands to those
6494  * N_Ports which are in node port recovery state and ADISC has not been issued
6495  * for the @vport. Each time an ELS ADISC IOCB is issued by invoking the
6496  * lpfc_issue_els_adisc() routine, the per @vport number of discover count
6497  * (num_disc_nodes) shall be incremented. If the num_disc_nodes reaches a
6498  * pre-configured threshold (cfg_discovery_threads), the @vport fc_flag will
6499  * be marked with FC_NLP_MORE bit and the process of issuing remaining ADISC
6500  * IOCBs quit for later pick up. On the other hand, after walking through
6501  * all the ndlps with the @vport and there is none ADISC IOCB issued, the
6502  * @vport fc_flag shall be cleared with FC_NLP_MORE bit indicating there is
6503  * no more ADISC need to be sent.
6504  *
6505  * Return code
6506  *    The number of N_Ports with adisc issued.
6507  **/
6508 int
6509 lpfc_els_disc_adisc(struct lpfc_vport *vport)
6510 {
6511         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
6512         struct lpfc_nodelist *ndlp, *next_ndlp;
6513         int sentadisc = 0;
6514
6515         /* go thru NPR nodes and issue any remaining ELS ADISCs */
6516         list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) {
6517
6518                 if (ndlp->nlp_state != NLP_STE_NPR_NODE ||
6519                     !(ndlp->nlp_flag & NLP_NPR_ADISC))
6520                         continue;
6521
6522                 spin_lock_irq(&ndlp->lock);
6523                 ndlp->nlp_flag &= ~NLP_NPR_ADISC;
6524                 spin_unlock_irq(&ndlp->lock);
6525
6526                 if (!(ndlp->nlp_flag & NLP_NPR_2B_DISC)) {
6527                         /* This node was marked for ADISC but was not picked
6528                          * for discovery. This is possible if the node was
6529                          * missing in gidft response.
6530                          *
6531                          * At time of marking node for ADISC, we skipped unreg
6532                          * from backend
6533                          */
6534                         lpfc_nlp_unreg_node(vport, ndlp);
6535                         lpfc_unreg_rpi(vport, ndlp);
6536                         continue;
6537                 }
6538
6539                 ndlp->nlp_prev_state = ndlp->nlp_state;
6540                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_ADISC_ISSUE);
6541                 lpfc_issue_els_adisc(vport, ndlp, 0);
6542                 sentadisc++;
6543                 vport->num_disc_nodes++;
6544                 if (vport->num_disc_nodes >=
6545                                 vport->cfg_discovery_threads) {
6546                         spin_lock_irq(shost->host_lock);
6547                         vport->fc_flag |= FC_NLP_MORE;
6548                         spin_unlock_irq(shost->host_lock);
6549                         break;
6550                 }
6551
6552         }
6553         if (sentadisc == 0) {
6554                 spin_lock_irq(shost->host_lock);
6555                 vport->fc_flag &= ~FC_NLP_MORE;
6556                 spin_unlock_irq(shost->host_lock);
6557         }
6558         return sentadisc;
6559 }
6560
6561 /**
6562  * lpfc_els_disc_plogi - Issue plogi for all npr nodes of a vport before adisc
6563  * @vport: pointer to a host virtual N_Port data structure.
6564  *
6565  * This routine issues Port Login (PLOGI) ELS commands to all the N_Ports
6566  * which are in node port recovery state, with a @vport. Each time an ELS
6567  * ADISC PLOGI IOCB is issued by invoking the lpfc_issue_els_plogi() routine,
6568  * the per @vport number of discover count (num_disc_nodes) shall be
6569  * incremented. If the num_disc_nodes reaches a pre-configured threshold
6570  * (cfg_discovery_threads), the @vport fc_flag will be marked with FC_NLP_MORE
6571  * bit set and quit the process of issuing remaining ADISC PLOGIN IOCBs for
6572  * later pick up. On the other hand, after walking through all the ndlps with
6573  * the @vport and there is none ADISC PLOGI IOCB issued, the @vport fc_flag
6574  * shall be cleared with the FC_NLP_MORE bit indicating there is no more ADISC
6575  * PLOGI need to be sent.
6576  *
6577  * Return code
6578  *   The number of N_Ports with plogi issued.
6579  **/
6580 int
6581 lpfc_els_disc_plogi(struct lpfc_vport *vport)
6582 {
6583         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
6584         struct lpfc_nodelist *ndlp, *next_ndlp;
6585         int sentplogi = 0;
6586
6587         /* go thru NPR nodes and issue any remaining ELS PLOGIs */
6588         list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) {
6589                 if (ndlp->nlp_state == NLP_STE_NPR_NODE &&
6590                                 (ndlp->nlp_flag & NLP_NPR_2B_DISC) != 0 &&
6591                                 (ndlp->nlp_flag & NLP_DELAY_TMO) == 0 &&
6592                                 (ndlp->nlp_flag & NLP_NPR_ADISC) == 0) {
6593                         ndlp->nlp_prev_state = ndlp->nlp_state;
6594                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
6595                         lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0);
6596                         sentplogi++;
6597                         vport->num_disc_nodes++;
6598                         if (vport->num_disc_nodes >=
6599                                         vport->cfg_discovery_threads) {
6600                                 spin_lock_irq(shost->host_lock);
6601                                 vport->fc_flag |= FC_NLP_MORE;
6602                                 spin_unlock_irq(shost->host_lock);
6603                                 break;
6604                         }
6605                 }
6606         }
6607
6608         lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
6609                          "6452 Discover PLOGI %d flag x%x\n",
6610                          sentplogi, vport->fc_flag);
6611
6612         if (sentplogi) {
6613                 lpfc_set_disctmo(vport);
6614         }
6615         else {
6616                 spin_lock_irq(shost->host_lock);
6617                 vport->fc_flag &= ~FC_NLP_MORE;
6618                 spin_unlock_irq(shost->host_lock);
6619         }
6620         return sentplogi;
6621 }
6622
6623 static uint32_t
6624 lpfc_rdp_res_link_service(struct fc_rdp_link_service_desc *desc,
6625                 uint32_t word0)
6626 {
6627
6628         desc->tag = cpu_to_be32(RDP_LINK_SERVICE_DESC_TAG);
6629         desc->payload.els_req = word0;
6630         desc->length = cpu_to_be32(sizeof(desc->payload));
6631
6632         return sizeof(struct fc_rdp_link_service_desc);
6633 }
6634
6635 static uint32_t
6636 lpfc_rdp_res_sfp_desc(struct fc_rdp_sfp_desc *desc,
6637                 uint8_t *page_a0, uint8_t *page_a2)
6638 {
6639         uint16_t wavelength;
6640         uint16_t temperature;
6641         uint16_t rx_power;
6642         uint16_t tx_bias;
6643         uint16_t tx_power;
6644         uint16_t vcc;
6645         uint16_t flag = 0;
6646         struct sff_trasnceiver_codes_byte4 *trasn_code_byte4;
6647         struct sff_trasnceiver_codes_byte5 *trasn_code_byte5;
6648
6649         desc->tag = cpu_to_be32(RDP_SFP_DESC_TAG);
6650
6651         trasn_code_byte4 = (struct sff_trasnceiver_codes_byte4 *)
6652                         &page_a0[SSF_TRANSCEIVER_CODE_B4];
6653         trasn_code_byte5 = (struct sff_trasnceiver_codes_byte5 *)
6654                         &page_a0[SSF_TRANSCEIVER_CODE_B5];
6655
6656         if ((trasn_code_byte4->fc_sw_laser) ||
6657             (trasn_code_byte5->fc_sw_laser_sl) ||
6658             (trasn_code_byte5->fc_sw_laser_sn)) {  /* check if its short WL */
6659                 flag |= (SFP_FLAG_PT_SWLASER << SFP_FLAG_PT_SHIFT);
6660         } else if (trasn_code_byte4->fc_lw_laser) {
6661                 wavelength = (page_a0[SSF_WAVELENGTH_B1] << 8) |
6662                         page_a0[SSF_WAVELENGTH_B0];
6663                 if (wavelength == SFP_WAVELENGTH_LC1310)
6664                         flag |= SFP_FLAG_PT_LWLASER_LC1310 << SFP_FLAG_PT_SHIFT;
6665                 if (wavelength == SFP_WAVELENGTH_LL1550)
6666                         flag |= SFP_FLAG_PT_LWLASER_LL1550 << SFP_FLAG_PT_SHIFT;
6667         }
6668         /* check if its SFP+ */
6669         flag |= ((page_a0[SSF_IDENTIFIER] == SFF_PG0_IDENT_SFP) ?
6670                         SFP_FLAG_CT_SFP_PLUS : SFP_FLAG_CT_UNKNOWN)
6671                                         << SFP_FLAG_CT_SHIFT;
6672
6673         /* check if its OPTICAL */
6674         flag |= ((page_a0[SSF_CONNECTOR] == SFF_PG0_CONNECTOR_LC) ?
6675                         SFP_FLAG_IS_OPTICAL_PORT : 0)
6676                                         << SFP_FLAG_IS_OPTICAL_SHIFT;
6677
6678         temperature = (page_a2[SFF_TEMPERATURE_B1] << 8 |
6679                 page_a2[SFF_TEMPERATURE_B0]);
6680         vcc = (page_a2[SFF_VCC_B1] << 8 |
6681                 page_a2[SFF_VCC_B0]);
6682         tx_power = (page_a2[SFF_TXPOWER_B1] << 8 |
6683                 page_a2[SFF_TXPOWER_B0]);
6684         tx_bias = (page_a2[SFF_TX_BIAS_CURRENT_B1] << 8 |
6685                 page_a2[SFF_TX_BIAS_CURRENT_B0]);
6686         rx_power = (page_a2[SFF_RXPOWER_B1] << 8 |
6687                 page_a2[SFF_RXPOWER_B0]);
6688         desc->sfp_info.temperature = cpu_to_be16(temperature);
6689         desc->sfp_info.rx_power = cpu_to_be16(rx_power);
6690         desc->sfp_info.tx_bias = cpu_to_be16(tx_bias);
6691         desc->sfp_info.tx_power = cpu_to_be16(tx_power);
6692         desc->sfp_info.vcc = cpu_to_be16(vcc);
6693
6694         desc->sfp_info.flags = cpu_to_be16(flag);
6695         desc->length = cpu_to_be32(sizeof(desc->sfp_info));
6696
6697         return sizeof(struct fc_rdp_sfp_desc);
6698 }
6699
6700 static uint32_t
6701 lpfc_rdp_res_link_error(struct fc_rdp_link_error_status_desc *desc,
6702                 READ_LNK_VAR *stat)
6703 {
6704         uint32_t type;
6705
6706         desc->tag = cpu_to_be32(RDP_LINK_ERROR_STATUS_DESC_TAG);
6707
6708         type = VN_PT_PHY_PF_PORT << VN_PT_PHY_SHIFT;
6709
6710         desc->info.port_type = cpu_to_be32(type);
6711
6712         desc->info.link_status.link_failure_cnt =
6713                 cpu_to_be32(stat->linkFailureCnt);
6714         desc->info.link_status.loss_of_synch_cnt =
6715                 cpu_to_be32(stat->lossSyncCnt);
6716         desc->info.link_status.loss_of_signal_cnt =
6717                 cpu_to_be32(stat->lossSignalCnt);
6718         desc->info.link_status.primitive_seq_proto_err =
6719                 cpu_to_be32(stat->primSeqErrCnt);
6720         desc->info.link_status.invalid_trans_word =
6721                 cpu_to_be32(stat->invalidXmitWord);
6722         desc->info.link_status.invalid_crc_cnt = cpu_to_be32(stat->crcCnt);
6723
6724         desc->length = cpu_to_be32(sizeof(desc->info));
6725
6726         return sizeof(struct fc_rdp_link_error_status_desc);
6727 }
6728
6729 static uint32_t
6730 lpfc_rdp_res_bbc_desc(struct fc_rdp_bbc_desc *desc, READ_LNK_VAR *stat,
6731                       struct lpfc_vport *vport)
6732 {
6733         uint32_t bbCredit;
6734
6735         desc->tag = cpu_to_be32(RDP_BBC_DESC_TAG);
6736
6737         bbCredit = vport->fc_sparam.cmn.bbCreditLsb |
6738                         (vport->fc_sparam.cmn.bbCreditMsb << 8);
6739         desc->bbc_info.port_bbc = cpu_to_be32(bbCredit);
6740         if (vport->phba->fc_topology != LPFC_TOPOLOGY_LOOP) {
6741                 bbCredit = vport->phba->fc_fabparam.cmn.bbCreditLsb |
6742                         (vport->phba->fc_fabparam.cmn.bbCreditMsb << 8);
6743                 desc->bbc_info.attached_port_bbc = cpu_to_be32(bbCredit);
6744         } else {
6745                 desc->bbc_info.attached_port_bbc = 0;
6746         }
6747
6748         desc->bbc_info.rtt = 0;
6749         desc->length = cpu_to_be32(sizeof(desc->bbc_info));
6750
6751         return sizeof(struct fc_rdp_bbc_desc);
6752 }
6753
6754 static uint32_t
6755 lpfc_rdp_res_oed_temp_desc(struct lpfc_hba *phba,
6756                            struct fc_rdp_oed_sfp_desc *desc, uint8_t *page_a2)
6757 {
6758         uint32_t flags = 0;
6759
6760         desc->tag = cpu_to_be32(RDP_OED_DESC_TAG);
6761
6762         desc->oed_info.hi_alarm = page_a2[SSF_TEMP_HIGH_ALARM];
6763         desc->oed_info.lo_alarm = page_a2[SSF_TEMP_LOW_ALARM];
6764         desc->oed_info.hi_warning = page_a2[SSF_TEMP_HIGH_WARNING];
6765         desc->oed_info.lo_warning = page_a2[SSF_TEMP_LOW_WARNING];
6766
6767         if (phba->sfp_alarm & LPFC_TRANSGRESSION_HIGH_TEMPERATURE)
6768                 flags |= RDP_OET_HIGH_ALARM;
6769         if (phba->sfp_alarm & LPFC_TRANSGRESSION_LOW_TEMPERATURE)
6770                 flags |= RDP_OET_LOW_ALARM;
6771         if (phba->sfp_warning & LPFC_TRANSGRESSION_HIGH_TEMPERATURE)
6772                 flags |= RDP_OET_HIGH_WARNING;
6773         if (phba->sfp_warning & LPFC_TRANSGRESSION_LOW_TEMPERATURE)
6774                 flags |= RDP_OET_LOW_WARNING;
6775
6776         flags |= ((0xf & RDP_OED_TEMPERATURE) << RDP_OED_TYPE_SHIFT);
6777         desc->oed_info.function_flags = cpu_to_be32(flags);
6778         desc->length = cpu_to_be32(sizeof(desc->oed_info));
6779         return sizeof(struct fc_rdp_oed_sfp_desc);
6780 }
6781
6782 static uint32_t
6783 lpfc_rdp_res_oed_voltage_desc(struct lpfc_hba *phba,
6784                               struct fc_rdp_oed_sfp_desc *desc,
6785                               uint8_t *page_a2)
6786 {
6787         uint32_t flags = 0;
6788
6789         desc->tag = cpu_to_be32(RDP_OED_DESC_TAG);
6790
6791         desc->oed_info.hi_alarm = page_a2[SSF_VOLTAGE_HIGH_ALARM];
6792         desc->oed_info.lo_alarm = page_a2[SSF_VOLTAGE_LOW_ALARM];
6793         desc->oed_info.hi_warning = page_a2[SSF_VOLTAGE_HIGH_WARNING];
6794         desc->oed_info.lo_warning = page_a2[SSF_VOLTAGE_LOW_WARNING];
6795
6796         if (phba->sfp_alarm & LPFC_TRANSGRESSION_HIGH_VOLTAGE)
6797                 flags |= RDP_OET_HIGH_ALARM;
6798         if (phba->sfp_alarm & LPFC_TRANSGRESSION_LOW_VOLTAGE)
6799                 flags |= RDP_OET_LOW_ALARM;
6800         if (phba->sfp_warning & LPFC_TRANSGRESSION_HIGH_VOLTAGE)
6801                 flags |= RDP_OET_HIGH_WARNING;
6802         if (phba->sfp_warning & LPFC_TRANSGRESSION_LOW_VOLTAGE)
6803                 flags |= RDP_OET_LOW_WARNING;
6804
6805         flags |= ((0xf & RDP_OED_VOLTAGE) << RDP_OED_TYPE_SHIFT);
6806         desc->oed_info.function_flags = cpu_to_be32(flags);
6807         desc->length = cpu_to_be32(sizeof(desc->oed_info));
6808         return sizeof(struct fc_rdp_oed_sfp_desc);
6809 }
6810
6811 static uint32_t
6812 lpfc_rdp_res_oed_txbias_desc(struct lpfc_hba *phba,
6813                              struct fc_rdp_oed_sfp_desc *desc,
6814                              uint8_t *page_a2)
6815 {
6816         uint32_t flags = 0;
6817
6818         desc->tag = cpu_to_be32(RDP_OED_DESC_TAG);
6819
6820         desc->oed_info.hi_alarm = page_a2[SSF_BIAS_HIGH_ALARM];
6821         desc->oed_info.lo_alarm = page_a2[SSF_BIAS_LOW_ALARM];
6822         desc->oed_info.hi_warning = page_a2[SSF_BIAS_HIGH_WARNING];
6823         desc->oed_info.lo_warning = page_a2[SSF_BIAS_LOW_WARNING];
6824
6825         if (phba->sfp_alarm & LPFC_TRANSGRESSION_HIGH_TXBIAS)
6826                 flags |= RDP_OET_HIGH_ALARM;
6827         if (phba->sfp_alarm & LPFC_TRANSGRESSION_LOW_TXBIAS)
6828                 flags |= RDP_OET_LOW_ALARM;
6829         if (phba->sfp_warning & LPFC_TRANSGRESSION_HIGH_TXBIAS)
6830                 flags |= RDP_OET_HIGH_WARNING;
6831         if (phba->sfp_warning & LPFC_TRANSGRESSION_LOW_TXBIAS)
6832                 flags |= RDP_OET_LOW_WARNING;
6833
6834         flags |= ((0xf & RDP_OED_TXBIAS) << RDP_OED_TYPE_SHIFT);
6835         desc->oed_info.function_flags = cpu_to_be32(flags);
6836         desc->length = cpu_to_be32(sizeof(desc->oed_info));
6837         return sizeof(struct fc_rdp_oed_sfp_desc);
6838 }
6839
6840 static uint32_t
6841 lpfc_rdp_res_oed_txpower_desc(struct lpfc_hba *phba,
6842                               struct fc_rdp_oed_sfp_desc *desc,
6843                               uint8_t *page_a2)
6844 {
6845         uint32_t flags = 0;
6846
6847         desc->tag = cpu_to_be32(RDP_OED_DESC_TAG);
6848
6849         desc->oed_info.hi_alarm = page_a2[SSF_TXPOWER_HIGH_ALARM];
6850         desc->oed_info.lo_alarm = page_a2[SSF_TXPOWER_LOW_ALARM];
6851         desc->oed_info.hi_warning = page_a2[SSF_TXPOWER_HIGH_WARNING];
6852         desc->oed_info.lo_warning = page_a2[SSF_TXPOWER_LOW_WARNING];
6853
6854         if (phba->sfp_alarm & LPFC_TRANSGRESSION_HIGH_TXPOWER)
6855                 flags |= RDP_OET_HIGH_ALARM;
6856         if (phba->sfp_alarm & LPFC_TRANSGRESSION_LOW_TXPOWER)
6857                 flags |= RDP_OET_LOW_ALARM;
6858         if (phba->sfp_warning & LPFC_TRANSGRESSION_HIGH_TXPOWER)
6859                 flags |= RDP_OET_HIGH_WARNING;
6860         if (phba->sfp_warning & LPFC_TRANSGRESSION_LOW_TXPOWER)
6861                 flags |= RDP_OET_LOW_WARNING;
6862
6863         flags |= ((0xf & RDP_OED_TXPOWER) << RDP_OED_TYPE_SHIFT);
6864         desc->oed_info.function_flags = cpu_to_be32(flags);
6865         desc->length = cpu_to_be32(sizeof(desc->oed_info));
6866         return sizeof(struct fc_rdp_oed_sfp_desc);
6867 }
6868
6869
6870 static uint32_t
6871 lpfc_rdp_res_oed_rxpower_desc(struct lpfc_hba *phba,
6872                               struct fc_rdp_oed_sfp_desc *desc,
6873                               uint8_t *page_a2)
6874 {
6875         uint32_t flags = 0;
6876
6877         desc->tag = cpu_to_be32(RDP_OED_DESC_TAG);
6878
6879         desc->oed_info.hi_alarm = page_a2[SSF_RXPOWER_HIGH_ALARM];
6880         desc->oed_info.lo_alarm = page_a2[SSF_RXPOWER_LOW_ALARM];
6881         desc->oed_info.hi_warning = page_a2[SSF_RXPOWER_HIGH_WARNING];
6882         desc->oed_info.lo_warning = page_a2[SSF_RXPOWER_LOW_WARNING];
6883
6884         if (phba->sfp_alarm & LPFC_TRANSGRESSION_HIGH_RXPOWER)
6885                 flags |= RDP_OET_HIGH_ALARM;
6886         if (phba->sfp_alarm & LPFC_TRANSGRESSION_LOW_RXPOWER)
6887                 flags |= RDP_OET_LOW_ALARM;
6888         if (phba->sfp_warning & LPFC_TRANSGRESSION_HIGH_RXPOWER)
6889                 flags |= RDP_OET_HIGH_WARNING;
6890         if (phba->sfp_warning & LPFC_TRANSGRESSION_LOW_RXPOWER)
6891                 flags |= RDP_OET_LOW_WARNING;
6892
6893         flags |= ((0xf & RDP_OED_RXPOWER) << RDP_OED_TYPE_SHIFT);
6894         desc->oed_info.function_flags = cpu_to_be32(flags);
6895         desc->length = cpu_to_be32(sizeof(desc->oed_info));
6896         return sizeof(struct fc_rdp_oed_sfp_desc);
6897 }
6898
6899 static uint32_t
6900 lpfc_rdp_res_opd_desc(struct fc_rdp_opd_sfp_desc *desc,
6901                       uint8_t *page_a0, struct lpfc_vport *vport)
6902 {
6903         desc->tag = cpu_to_be32(RDP_OPD_DESC_TAG);
6904         memcpy(desc->opd_info.vendor_name, &page_a0[SSF_VENDOR_NAME], 16);
6905         memcpy(desc->opd_info.model_number, &page_a0[SSF_VENDOR_PN], 16);
6906         memcpy(desc->opd_info.serial_number, &page_a0[SSF_VENDOR_SN], 16);
6907         memcpy(desc->opd_info.revision, &page_a0[SSF_VENDOR_REV], 4);
6908         memcpy(desc->opd_info.date, &page_a0[SSF_DATE_CODE], 8);
6909         desc->length = cpu_to_be32(sizeof(desc->opd_info));
6910         return sizeof(struct fc_rdp_opd_sfp_desc);
6911 }
6912
6913 static uint32_t
6914 lpfc_rdp_res_fec_desc(struct fc_fec_rdp_desc *desc, READ_LNK_VAR *stat)
6915 {
6916         if (bf_get(lpfc_read_link_stat_gec2, stat) == 0)
6917                 return 0;
6918         desc->tag = cpu_to_be32(RDP_FEC_DESC_TAG);
6919
6920         desc->info.CorrectedBlocks =
6921                 cpu_to_be32(stat->fecCorrBlkCount);
6922         desc->info.UncorrectableBlocks =
6923                 cpu_to_be32(stat->fecUncorrBlkCount);
6924
6925         desc->length = cpu_to_be32(sizeof(desc->info));
6926
6927         return sizeof(struct fc_fec_rdp_desc);
6928 }
6929
6930 static uint32_t
6931 lpfc_rdp_res_speed(struct fc_rdp_port_speed_desc *desc, struct lpfc_hba *phba)
6932 {
6933         uint16_t rdp_cap = 0;
6934         uint16_t rdp_speed;
6935
6936         desc->tag = cpu_to_be32(RDP_PORT_SPEED_DESC_TAG);
6937
6938         switch (phba->fc_linkspeed) {
6939         case LPFC_LINK_SPEED_1GHZ:
6940                 rdp_speed = RDP_PS_1GB;
6941                 break;
6942         case LPFC_LINK_SPEED_2GHZ:
6943                 rdp_speed = RDP_PS_2GB;
6944                 break;
6945         case LPFC_LINK_SPEED_4GHZ:
6946                 rdp_speed = RDP_PS_4GB;
6947                 break;
6948         case LPFC_LINK_SPEED_8GHZ:
6949                 rdp_speed = RDP_PS_8GB;
6950                 break;
6951         case LPFC_LINK_SPEED_10GHZ:
6952                 rdp_speed = RDP_PS_10GB;
6953                 break;
6954         case LPFC_LINK_SPEED_16GHZ:
6955                 rdp_speed = RDP_PS_16GB;
6956                 break;
6957         case LPFC_LINK_SPEED_32GHZ:
6958                 rdp_speed = RDP_PS_32GB;
6959                 break;
6960         case LPFC_LINK_SPEED_64GHZ:
6961                 rdp_speed = RDP_PS_64GB;
6962                 break;
6963         case LPFC_LINK_SPEED_128GHZ:
6964                 rdp_speed = RDP_PS_128GB;
6965                 break;
6966         case LPFC_LINK_SPEED_256GHZ:
6967                 rdp_speed = RDP_PS_256GB;
6968                 break;
6969         default:
6970                 rdp_speed = RDP_PS_UNKNOWN;
6971                 break;
6972         }
6973
6974         desc->info.port_speed.speed = cpu_to_be16(rdp_speed);
6975
6976         if (phba->lmt & LMT_256Gb)
6977                 rdp_cap |= RDP_PS_256GB;
6978         if (phba->lmt & LMT_128Gb)
6979                 rdp_cap |= RDP_PS_128GB;
6980         if (phba->lmt & LMT_64Gb)
6981                 rdp_cap |= RDP_PS_64GB;
6982         if (phba->lmt & LMT_32Gb)
6983                 rdp_cap |= RDP_PS_32GB;
6984         if (phba->lmt & LMT_16Gb)
6985                 rdp_cap |= RDP_PS_16GB;
6986         if (phba->lmt & LMT_10Gb)
6987                 rdp_cap |= RDP_PS_10GB;
6988         if (phba->lmt & LMT_8Gb)
6989                 rdp_cap |= RDP_PS_8GB;
6990         if (phba->lmt & LMT_4Gb)
6991                 rdp_cap |= RDP_PS_4GB;
6992         if (phba->lmt & LMT_2Gb)
6993                 rdp_cap |= RDP_PS_2GB;
6994         if (phba->lmt & LMT_1Gb)
6995                 rdp_cap |= RDP_PS_1GB;
6996
6997         if (rdp_cap == 0)
6998                 rdp_cap = RDP_CAP_UNKNOWN;
6999         if (phba->cfg_link_speed != LPFC_USER_LINK_SPEED_AUTO)
7000                 rdp_cap |= RDP_CAP_USER_CONFIGURED;
7001
7002         desc->info.port_speed.capabilities = cpu_to_be16(rdp_cap);
7003         desc->length = cpu_to_be32(sizeof(desc->info));
7004         return sizeof(struct fc_rdp_port_speed_desc);
7005 }
7006
7007 static uint32_t
7008 lpfc_rdp_res_diag_port_names(struct fc_rdp_port_name_desc *desc,
7009                 struct lpfc_vport *vport)
7010 {
7011
7012         desc->tag = cpu_to_be32(RDP_PORT_NAMES_DESC_TAG);
7013
7014         memcpy(desc->port_names.wwnn, &vport->fc_nodename,
7015                         sizeof(desc->port_names.wwnn));
7016
7017         memcpy(desc->port_names.wwpn, &vport->fc_portname,
7018                         sizeof(desc->port_names.wwpn));
7019
7020         desc->length = cpu_to_be32(sizeof(desc->port_names));
7021         return sizeof(struct fc_rdp_port_name_desc);
7022 }
7023
7024 static uint32_t
7025 lpfc_rdp_res_attach_port_names(struct fc_rdp_port_name_desc *desc,
7026                 struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
7027 {
7028
7029         desc->tag = cpu_to_be32(RDP_PORT_NAMES_DESC_TAG);
7030         if (vport->fc_flag & FC_FABRIC) {
7031                 memcpy(desc->port_names.wwnn, &vport->fabric_nodename,
7032                        sizeof(desc->port_names.wwnn));
7033
7034                 memcpy(desc->port_names.wwpn, &vport->fabric_portname,
7035                        sizeof(desc->port_names.wwpn));
7036         } else {  /* Point to Point */
7037                 memcpy(desc->port_names.wwnn, &ndlp->nlp_nodename,
7038                        sizeof(desc->port_names.wwnn));
7039
7040                 memcpy(desc->port_names.wwpn, &ndlp->nlp_portname,
7041                        sizeof(desc->port_names.wwpn));
7042         }
7043
7044         desc->length = cpu_to_be32(sizeof(desc->port_names));
7045         return sizeof(struct fc_rdp_port_name_desc);
7046 }
7047
7048 static void
7049 lpfc_els_rdp_cmpl(struct lpfc_hba *phba, struct lpfc_rdp_context *rdp_context,
7050                 int status)
7051 {
7052         struct lpfc_nodelist *ndlp = rdp_context->ndlp;
7053         struct lpfc_vport *vport = ndlp->vport;
7054         struct lpfc_iocbq *elsiocb;
7055         struct ulp_bde64 *bpl;
7056         IOCB_t *icmd;
7057         union lpfc_wqe128 *wqe;
7058         uint8_t *pcmd;
7059         struct ls_rjt *stat;
7060         struct fc_rdp_res_frame *rdp_res;
7061         uint32_t cmdsize, len;
7062         uint16_t *flag_ptr;
7063         int rc;
7064         u32 ulp_context;
7065
7066         if (status != SUCCESS)
7067                 goto error;
7068
7069         /* This will change once we know the true size of the RDP payload */
7070         cmdsize = sizeof(struct fc_rdp_res_frame);
7071
7072         elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize,
7073                                 lpfc_max_els_tries, rdp_context->ndlp,
7074                                 rdp_context->ndlp->nlp_DID, ELS_CMD_ACC);
7075         if (!elsiocb)
7076                 goto free_rdp_context;
7077
7078         ulp_context = get_job_ulpcontext(phba, elsiocb);
7079         if (phba->sli_rev == LPFC_SLI_REV4) {
7080                 wqe = &elsiocb->wqe;
7081                 /* ox-id of the frame */
7082                 bf_set(wqe_rcvoxid, &wqe->xmit_els_rsp.wqe_com,
7083                        rdp_context->ox_id);
7084                 bf_set(wqe_ctxt_tag, &wqe->xmit_els_rsp.wqe_com,
7085                        rdp_context->rx_id);
7086         } else {
7087                 icmd = &elsiocb->iocb;
7088                 icmd->ulpContext = rdp_context->rx_id;
7089                 icmd->unsli3.rcvsli3.ox_id = rdp_context->ox_id;
7090         }
7091
7092         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
7093                         "2171 Xmit RDP response tag x%x xri x%x, "
7094                         "did x%x, nlp_flag x%x, nlp_state x%x, rpi x%x",
7095                         elsiocb->iotag, ulp_context,
7096                         ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
7097                         ndlp->nlp_rpi);
7098         rdp_res = (struct fc_rdp_res_frame *)elsiocb->cmd_dmabuf->virt;
7099         pcmd = (uint8_t *)elsiocb->cmd_dmabuf->virt;
7100         memset(pcmd, 0, sizeof(struct fc_rdp_res_frame));
7101         *((uint32_t *) (pcmd)) = ELS_CMD_ACC;
7102
7103         /* Update Alarm and Warning */
7104         flag_ptr = (uint16_t *)(rdp_context->page_a2 + SSF_ALARM_FLAGS);
7105         phba->sfp_alarm |= *flag_ptr;
7106         flag_ptr = (uint16_t *)(rdp_context->page_a2 + SSF_WARNING_FLAGS);
7107         phba->sfp_warning |= *flag_ptr;
7108
7109         /* For RDP payload */
7110         len = 8;
7111         len += lpfc_rdp_res_link_service((struct fc_rdp_link_service_desc *)
7112                                          (len + pcmd), ELS_CMD_RDP);
7113
7114         len += lpfc_rdp_res_sfp_desc((struct fc_rdp_sfp_desc *)(len + pcmd),
7115                         rdp_context->page_a0, rdp_context->page_a2);
7116         len += lpfc_rdp_res_speed((struct fc_rdp_port_speed_desc *)(len + pcmd),
7117                                   phba);
7118         len += lpfc_rdp_res_link_error((struct fc_rdp_link_error_status_desc *)
7119                                        (len + pcmd), &rdp_context->link_stat);
7120         len += lpfc_rdp_res_diag_port_names((struct fc_rdp_port_name_desc *)
7121                                              (len + pcmd), vport);
7122         len += lpfc_rdp_res_attach_port_names((struct fc_rdp_port_name_desc *)
7123                                         (len + pcmd), vport, ndlp);
7124         len += lpfc_rdp_res_fec_desc((struct fc_fec_rdp_desc *)(len + pcmd),
7125                         &rdp_context->link_stat);
7126         len += lpfc_rdp_res_bbc_desc((struct fc_rdp_bbc_desc *)(len + pcmd),
7127                                      &rdp_context->link_stat, vport);
7128         len += lpfc_rdp_res_oed_temp_desc(phba,
7129                                 (struct fc_rdp_oed_sfp_desc *)(len + pcmd),
7130                                 rdp_context->page_a2);
7131         len += lpfc_rdp_res_oed_voltage_desc(phba,
7132                                 (struct fc_rdp_oed_sfp_desc *)(len + pcmd),
7133                                 rdp_context->page_a2);
7134         len += lpfc_rdp_res_oed_txbias_desc(phba,
7135                                 (struct fc_rdp_oed_sfp_desc *)(len + pcmd),
7136                                 rdp_context->page_a2);
7137         len += lpfc_rdp_res_oed_txpower_desc(phba,
7138                                 (struct fc_rdp_oed_sfp_desc *)(len + pcmd),
7139                                 rdp_context->page_a2);
7140         len += lpfc_rdp_res_oed_rxpower_desc(phba,
7141                                 (struct fc_rdp_oed_sfp_desc *)(len + pcmd),
7142                                 rdp_context->page_a2);
7143         len += lpfc_rdp_res_opd_desc((struct fc_rdp_opd_sfp_desc *)(len + pcmd),
7144                                      rdp_context->page_a0, vport);
7145
7146         rdp_res->length = cpu_to_be32(len - 8);
7147         elsiocb->cmd_cmpl = lpfc_cmpl_els_rsp;
7148
7149         /* Now that we know the true size of the payload, update the BPL */
7150         bpl = (struct ulp_bde64 *)elsiocb->bpl_dmabuf->virt;
7151         bpl->tus.f.bdeSize = len;
7152         bpl->tus.f.bdeFlags = 0;
7153         bpl->tus.w = le32_to_cpu(bpl->tus.w);
7154
7155         phba->fc_stat.elsXmitACC++;
7156         elsiocb->ndlp = lpfc_nlp_get(ndlp);
7157         if (!elsiocb->ndlp) {
7158                 lpfc_els_free_iocb(phba, elsiocb);
7159                 goto free_rdp_context;
7160         }
7161
7162         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
7163         if (rc == IOCB_ERROR) {
7164                 lpfc_els_free_iocb(phba, elsiocb);
7165                 lpfc_nlp_put(ndlp);
7166         }
7167
7168         goto free_rdp_context;
7169
7170 error:
7171         cmdsize = 2 * sizeof(uint32_t);
7172         elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, lpfc_max_els_tries,
7173                         ndlp, ndlp->nlp_DID, ELS_CMD_LS_RJT);
7174         if (!elsiocb)
7175                 goto free_rdp_context;
7176
7177         if (phba->sli_rev == LPFC_SLI_REV4) {
7178                 wqe = &elsiocb->wqe;
7179                 /* ox-id of the frame */
7180                 bf_set(wqe_rcvoxid, &wqe->xmit_els_rsp.wqe_com,
7181                        rdp_context->ox_id);
7182                 bf_set(wqe_ctxt_tag,
7183                        &wqe->xmit_els_rsp.wqe_com,
7184                        rdp_context->rx_id);
7185         } else {
7186                 icmd = &elsiocb->iocb;
7187                 icmd->ulpContext = rdp_context->rx_id;
7188                 icmd->unsli3.rcvsli3.ox_id = rdp_context->ox_id;
7189         }
7190
7191         pcmd = (uint8_t *)elsiocb->cmd_dmabuf->virt;
7192
7193         *((uint32_t *) (pcmd)) = ELS_CMD_LS_RJT;
7194         stat = (struct ls_rjt *)(pcmd + sizeof(uint32_t));
7195         stat->un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
7196
7197         phba->fc_stat.elsXmitLSRJT++;
7198         elsiocb->cmd_cmpl = lpfc_cmpl_els_rsp;
7199         elsiocb->ndlp = lpfc_nlp_get(ndlp);
7200         if (!elsiocb->ndlp) {
7201                 lpfc_els_free_iocb(phba, elsiocb);
7202                 goto free_rdp_context;
7203         }
7204
7205         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
7206         if (rc == IOCB_ERROR) {
7207                 lpfc_els_free_iocb(phba, elsiocb);
7208                 lpfc_nlp_put(ndlp);
7209         }
7210
7211 free_rdp_context:
7212         /* This reference put is for the original unsolicited RDP. If the
7213          * prep failed, there is no reference to remove.
7214          */
7215         lpfc_nlp_put(ndlp);
7216         kfree(rdp_context);
7217 }
7218
7219 static int
7220 lpfc_get_rdp_info(struct lpfc_hba *phba, struct lpfc_rdp_context *rdp_context)
7221 {
7222         LPFC_MBOXQ_t *mbox = NULL;
7223         int rc;
7224
7225         mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
7226         if (!mbox) {
7227                 lpfc_printf_log(phba, KERN_WARNING, LOG_MBOX | LOG_ELS,
7228                                 "7105 failed to allocate mailbox memory");
7229                 return 1;
7230         }
7231
7232         if (lpfc_sli4_dump_page_a0(phba, mbox))
7233                 goto rdp_fail;
7234         mbox->vport = rdp_context->ndlp->vport;
7235         mbox->mbox_cmpl = lpfc_mbx_cmpl_rdp_page_a0;
7236         mbox->ctx_ndlp = (struct lpfc_rdp_context *)rdp_context;
7237         rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
7238         if (rc == MBX_NOT_FINISHED) {
7239                 lpfc_mbox_rsrc_cleanup(phba, mbox, MBOX_THD_UNLOCKED);
7240                 return 1;
7241         }
7242
7243         return 0;
7244
7245 rdp_fail:
7246         mempool_free(mbox, phba->mbox_mem_pool);
7247         return 1;
7248 }
7249
7250 int lpfc_get_sfp_info_wait(struct lpfc_hba *phba,
7251                            struct lpfc_rdp_context *rdp_context)
7252 {
7253         LPFC_MBOXQ_t *mbox = NULL;
7254         int rc;
7255         struct lpfc_dmabuf *mp;
7256         struct lpfc_dmabuf *mpsave;
7257         void *virt;
7258         MAILBOX_t *mb;
7259
7260         mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
7261         if (!mbox) {
7262                 lpfc_printf_log(phba, KERN_WARNING, LOG_MBOX | LOG_ELS,
7263                                 "7205 failed to allocate mailbox memory");
7264                 return 1;
7265         }
7266
7267         if (lpfc_sli4_dump_page_a0(phba, mbox))
7268                 goto sfp_fail;
7269         mp = mbox->ctx_buf;
7270         mpsave = mp;
7271         virt = mp->virt;
7272         if (phba->sli_rev < LPFC_SLI_REV4) {
7273                 mb = &mbox->u.mb;
7274                 mb->un.varDmp.cv = 1;
7275                 mb->un.varDmp.co = 1;
7276                 mb->un.varWords[2] = 0;
7277                 mb->un.varWords[3] = DMP_SFF_PAGE_A0_SIZE / 4;
7278                 mb->un.varWords[4] = 0;
7279                 mb->un.varWords[5] = 0;
7280                 mb->un.varWords[6] = 0;
7281                 mb->un.varWords[7] = 0;
7282                 mb->un.varWords[8] = 0;
7283                 mb->un.varWords[9] = 0;
7284                 mb->un.varWords[10] = 0;
7285                 mbox->in_ext_byte_len = DMP_SFF_PAGE_A0_SIZE;
7286                 mbox->out_ext_byte_len = DMP_SFF_PAGE_A0_SIZE;
7287                 mbox->mbox_offset_word = 5;
7288                 mbox->ctx_buf = virt;
7289         } else {
7290                 bf_set(lpfc_mbx_memory_dump_type3_length,
7291                        &mbox->u.mqe.un.mem_dump_type3, DMP_SFF_PAGE_A0_SIZE);
7292                 mbox->u.mqe.un.mem_dump_type3.addr_lo = putPaddrLow(mp->phys);
7293                 mbox->u.mqe.un.mem_dump_type3.addr_hi = putPaddrHigh(mp->phys);
7294         }
7295         mbox->vport = phba->pport;
7296         mbox->ctx_ndlp = (struct lpfc_rdp_context *)rdp_context;
7297
7298         rc = lpfc_sli_issue_mbox_wait(phba, mbox, 30);
7299         if (rc == MBX_NOT_FINISHED) {
7300                 rc = 1;
7301                 goto error;
7302         }
7303
7304         if (phba->sli_rev == LPFC_SLI_REV4)
7305                 mp = (struct lpfc_dmabuf *)(mbox->ctx_buf);
7306         else
7307                 mp = mpsave;
7308
7309         if (bf_get(lpfc_mqe_status, &mbox->u.mqe)) {
7310                 rc = 1;
7311                 goto error;
7312         }
7313
7314         lpfc_sli_bemem_bcopy(mp->virt, &rdp_context->page_a0,
7315                              DMP_SFF_PAGE_A0_SIZE);
7316
7317         memset(mbox, 0, sizeof(*mbox));
7318         memset(mp->virt, 0, DMP_SFF_PAGE_A2_SIZE);
7319         INIT_LIST_HEAD(&mp->list);
7320
7321         /* save address for completion */
7322         mbox->ctx_buf = mp;
7323         mbox->vport = phba->pport;
7324
7325         bf_set(lpfc_mqe_command, &mbox->u.mqe, MBX_DUMP_MEMORY);
7326         bf_set(lpfc_mbx_memory_dump_type3_type,
7327                &mbox->u.mqe.un.mem_dump_type3, DMP_LMSD);
7328         bf_set(lpfc_mbx_memory_dump_type3_link,
7329                &mbox->u.mqe.un.mem_dump_type3, phba->sli4_hba.physical_port);
7330         bf_set(lpfc_mbx_memory_dump_type3_page_no,
7331                &mbox->u.mqe.un.mem_dump_type3, DMP_PAGE_A2);
7332         if (phba->sli_rev < LPFC_SLI_REV4) {
7333                 mb = &mbox->u.mb;
7334                 mb->un.varDmp.cv = 1;
7335                 mb->un.varDmp.co = 1;
7336                 mb->un.varWords[2] = 0;
7337                 mb->un.varWords[3] = DMP_SFF_PAGE_A2_SIZE / 4;
7338                 mb->un.varWords[4] = 0;
7339                 mb->un.varWords[5] = 0;
7340                 mb->un.varWords[6] = 0;
7341                 mb->un.varWords[7] = 0;
7342                 mb->un.varWords[8] = 0;
7343                 mb->un.varWords[9] = 0;
7344                 mb->un.varWords[10] = 0;
7345                 mbox->in_ext_byte_len = DMP_SFF_PAGE_A2_SIZE;
7346                 mbox->out_ext_byte_len = DMP_SFF_PAGE_A2_SIZE;
7347                 mbox->mbox_offset_word = 5;
7348                 mbox->ctx_buf = virt;
7349         } else {
7350                 bf_set(lpfc_mbx_memory_dump_type3_length,
7351                        &mbox->u.mqe.un.mem_dump_type3, DMP_SFF_PAGE_A2_SIZE);
7352                 mbox->u.mqe.un.mem_dump_type3.addr_lo = putPaddrLow(mp->phys);
7353                 mbox->u.mqe.un.mem_dump_type3.addr_hi = putPaddrHigh(mp->phys);
7354         }
7355
7356         mbox->ctx_ndlp = (struct lpfc_rdp_context *)rdp_context;
7357         rc = lpfc_sli_issue_mbox_wait(phba, mbox, 30);
7358         if (bf_get(lpfc_mqe_status, &mbox->u.mqe)) {
7359                 rc = 1;
7360                 goto error;
7361         }
7362         rc = 0;
7363
7364         lpfc_sli_bemem_bcopy(mp->virt, &rdp_context->page_a2,
7365                              DMP_SFF_PAGE_A2_SIZE);
7366
7367 error:
7368         mbox->ctx_buf = mpsave;
7369         lpfc_mbox_rsrc_cleanup(phba, mbox, MBOX_THD_UNLOCKED);
7370
7371         return rc;
7372
7373 sfp_fail:
7374         mempool_free(mbox, phba->mbox_mem_pool);
7375         return 1;
7376 }
7377
7378 /*
7379  * lpfc_els_rcv_rdp - Process an unsolicited RDP ELS.
7380  * @vport: pointer to a host virtual N_Port data structure.
7381  * @cmdiocb: pointer to lpfc command iocb data structure.
7382  * @ndlp: pointer to a node-list data structure.
7383  *
7384  * This routine processes an unsolicited RDP(Read Diagnostic Parameters)
7385  * IOCB. First, the payload of the unsolicited RDP is checked.
7386  * Then it will (1) send MBX_DUMP_MEMORY, Embedded DMP_LMSD sub command TYPE-3
7387  * for Page A0, (2) send MBX_DUMP_MEMORY, DMP_LMSD for Page A2,
7388  * (3) send MBX_READ_LNK_STAT to get link stat, (4) Call lpfc_els_rdp_cmpl
7389  * gather all data and send RDP response.
7390  *
7391  * Return code
7392  *   0 - Sent the acc response
7393  *   1 - Sent the reject response.
7394  */
7395 static int
7396 lpfc_els_rcv_rdp(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
7397                 struct lpfc_nodelist *ndlp)
7398 {
7399         struct lpfc_hba *phba = vport->phba;
7400         struct lpfc_dmabuf *pcmd;
7401         uint8_t rjt_err, rjt_expl = LSEXP_NOTHING_MORE;
7402         struct fc_rdp_req_frame *rdp_req;
7403         struct lpfc_rdp_context *rdp_context;
7404         union lpfc_wqe128 *cmd = NULL;
7405         struct ls_rjt stat;
7406
7407         if (phba->sli_rev < LPFC_SLI_REV4 ||
7408             bf_get(lpfc_sli_intf_if_type, &phba->sli4_hba.sli_intf) <
7409                                                 LPFC_SLI_INTF_IF_TYPE_2) {
7410                 rjt_err = LSRJT_UNABLE_TPC;
7411                 rjt_expl = LSEXP_REQ_UNSUPPORTED;
7412                 goto error;
7413         }
7414
7415         if (phba->sli_rev < LPFC_SLI_REV4 || (phba->hba_flag & HBA_FCOE_MODE)) {
7416                 rjt_err = LSRJT_UNABLE_TPC;
7417                 rjt_expl = LSEXP_REQ_UNSUPPORTED;
7418                 goto error;
7419         }
7420
7421         pcmd = cmdiocb->cmd_dmabuf;
7422         rdp_req = (struct fc_rdp_req_frame *) pcmd->virt;
7423
7424         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
7425                          "2422 ELS RDP Request "
7426                          "dec len %d tag x%x port_id %d len %d\n",
7427                          be32_to_cpu(rdp_req->rdp_des_length),
7428                          be32_to_cpu(rdp_req->nport_id_desc.tag),
7429                          be32_to_cpu(rdp_req->nport_id_desc.nport_id),
7430                          be32_to_cpu(rdp_req->nport_id_desc.length));
7431
7432         if (sizeof(struct fc_rdp_nport_desc) !=
7433                         be32_to_cpu(rdp_req->rdp_des_length))
7434                 goto rjt_logerr;
7435         if (RDP_N_PORT_DESC_TAG != be32_to_cpu(rdp_req->nport_id_desc.tag))
7436                 goto rjt_logerr;
7437         if (RDP_NPORT_ID_SIZE !=
7438                         be32_to_cpu(rdp_req->nport_id_desc.length))
7439                 goto rjt_logerr;
7440         rdp_context = kzalloc(sizeof(struct lpfc_rdp_context), GFP_KERNEL);
7441         if (!rdp_context) {
7442                 rjt_err = LSRJT_UNABLE_TPC;
7443                 goto error;
7444         }
7445
7446         cmd = &cmdiocb->wqe;
7447         rdp_context->ndlp = lpfc_nlp_get(ndlp);
7448         if (!rdp_context->ndlp) {
7449                 kfree(rdp_context);
7450                 rjt_err = LSRJT_UNABLE_TPC;
7451                 goto error;
7452         }
7453         rdp_context->ox_id = bf_get(wqe_rcvoxid,
7454                                     &cmd->xmit_els_rsp.wqe_com);
7455         rdp_context->rx_id = bf_get(wqe_ctxt_tag,
7456                                     &cmd->xmit_els_rsp.wqe_com);
7457         rdp_context->cmpl = lpfc_els_rdp_cmpl;
7458         if (lpfc_get_rdp_info(phba, rdp_context)) {
7459                 lpfc_printf_vlog(ndlp->vport, KERN_WARNING, LOG_ELS,
7460                                  "2423 Unable to send mailbox");
7461                 kfree(rdp_context);
7462                 rjt_err = LSRJT_UNABLE_TPC;
7463                 lpfc_nlp_put(ndlp);
7464                 goto error;
7465         }
7466
7467         return 0;
7468
7469 rjt_logerr:
7470         rjt_err = LSRJT_LOGICAL_ERR;
7471
7472 error:
7473         memset(&stat, 0, sizeof(stat));
7474         stat.un.b.lsRjtRsnCode = rjt_err;
7475         stat.un.b.lsRjtRsnCodeExp = rjt_expl;
7476         lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
7477         return 1;
7478 }
7479
7480
7481 static void
7482 lpfc_els_lcb_rsp(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
7483 {
7484         MAILBOX_t *mb;
7485         IOCB_t *icmd;
7486         union lpfc_wqe128 *wqe;
7487         uint8_t *pcmd;
7488         struct lpfc_iocbq *elsiocb;
7489         struct lpfc_nodelist *ndlp;
7490         struct ls_rjt *stat;
7491         union lpfc_sli4_cfg_shdr *shdr;
7492         struct lpfc_lcb_context *lcb_context;
7493         struct fc_lcb_res_frame *lcb_res;
7494         uint32_t cmdsize, shdr_status, shdr_add_status;
7495         int rc;
7496
7497         mb = &pmb->u.mb;
7498         lcb_context = (struct lpfc_lcb_context *)pmb->ctx_ndlp;
7499         ndlp = lcb_context->ndlp;
7500         pmb->ctx_ndlp = NULL;
7501         pmb->ctx_buf = NULL;
7502
7503         shdr = (union lpfc_sli4_cfg_shdr *)
7504                         &pmb->u.mqe.un.beacon_config.header.cfg_shdr;
7505         shdr_status = bf_get(lpfc_mbox_hdr_status, &shdr->response);
7506         shdr_add_status = bf_get(lpfc_mbox_hdr_add_status, &shdr->response);
7507
7508         lpfc_printf_log(phba, KERN_INFO, LOG_MBOX,
7509                                 "0194 SET_BEACON_CONFIG mailbox "
7510                                 "completed with status x%x add_status x%x,"
7511                                 " mbx status x%x\n",
7512                                 shdr_status, shdr_add_status, mb->mbxStatus);
7513
7514         if ((mb->mbxStatus != MBX_SUCCESS) || shdr_status ||
7515             (shdr_add_status == ADD_STATUS_OPERATION_ALREADY_ACTIVE) ||
7516             (shdr_add_status == ADD_STATUS_INVALID_REQUEST)) {
7517                 mempool_free(pmb, phba->mbox_mem_pool);
7518                 goto error;
7519         }
7520
7521         mempool_free(pmb, phba->mbox_mem_pool);
7522         cmdsize = sizeof(struct fc_lcb_res_frame);
7523         elsiocb = lpfc_prep_els_iocb(phba->pport, 0, cmdsize,
7524                         lpfc_max_els_tries, ndlp,
7525                         ndlp->nlp_DID, ELS_CMD_ACC);
7526
7527         /* Decrement the ndlp reference count from previous mbox command */
7528         lpfc_nlp_put(ndlp);
7529
7530         if (!elsiocb)
7531                 goto free_lcb_context;
7532
7533         lcb_res = (struct fc_lcb_res_frame *)elsiocb->cmd_dmabuf->virt;
7534
7535         memset(lcb_res, 0, sizeof(struct fc_lcb_res_frame));
7536
7537         if (phba->sli_rev == LPFC_SLI_REV4) {
7538                 wqe = &elsiocb->wqe;
7539                 bf_set(wqe_ctxt_tag, &wqe->generic.wqe_com, lcb_context->rx_id);
7540                 bf_set(wqe_rcvoxid, &wqe->xmit_els_rsp.wqe_com,
7541                        lcb_context->ox_id);
7542         } else {
7543                 icmd = &elsiocb->iocb;
7544                 icmd->ulpContext = lcb_context->rx_id;
7545                 icmd->unsli3.rcvsli3.ox_id = lcb_context->ox_id;
7546         }
7547
7548         pcmd = (uint8_t *)elsiocb->cmd_dmabuf->virt;
7549         *((uint32_t *)(pcmd)) = ELS_CMD_ACC;
7550         lcb_res->lcb_sub_command = lcb_context->sub_command;
7551         lcb_res->lcb_type = lcb_context->type;
7552         lcb_res->capability = lcb_context->capability;
7553         lcb_res->lcb_frequency = lcb_context->frequency;
7554         lcb_res->lcb_duration = lcb_context->duration;
7555         elsiocb->cmd_cmpl = lpfc_cmpl_els_rsp;
7556         phba->fc_stat.elsXmitACC++;
7557
7558         elsiocb->ndlp = lpfc_nlp_get(ndlp);
7559         if (!elsiocb->ndlp) {
7560                 lpfc_els_free_iocb(phba, elsiocb);
7561                 goto out;
7562         }
7563
7564         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
7565         if (rc == IOCB_ERROR) {
7566                 lpfc_els_free_iocb(phba, elsiocb);
7567                 lpfc_nlp_put(ndlp);
7568         }
7569  out:
7570         kfree(lcb_context);
7571         return;
7572
7573 error:
7574         cmdsize = sizeof(struct fc_lcb_res_frame);
7575         elsiocb = lpfc_prep_els_iocb(phba->pport, 0, cmdsize,
7576                                      lpfc_max_els_tries, ndlp,
7577                                      ndlp->nlp_DID, ELS_CMD_LS_RJT);
7578         lpfc_nlp_put(ndlp);
7579         if (!elsiocb)
7580                 goto free_lcb_context;
7581
7582         if (phba->sli_rev == LPFC_SLI_REV4) {
7583                 wqe = &elsiocb->wqe;
7584                 bf_set(wqe_ctxt_tag, &wqe->generic.wqe_com, lcb_context->rx_id);
7585                 bf_set(wqe_rcvoxid, &wqe->xmit_els_rsp.wqe_com,
7586                        lcb_context->ox_id);
7587         } else {
7588                 icmd = &elsiocb->iocb;
7589                 icmd->ulpContext = lcb_context->rx_id;
7590                 icmd->unsli3.rcvsli3.ox_id = lcb_context->ox_id;
7591         }
7592
7593         pcmd = (uint8_t *)elsiocb->cmd_dmabuf->virt;
7594
7595         *((uint32_t *)(pcmd)) = ELS_CMD_LS_RJT;
7596         stat = (struct ls_rjt *)(pcmd + sizeof(uint32_t));
7597         stat->un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
7598
7599         if (shdr_add_status == ADD_STATUS_OPERATION_ALREADY_ACTIVE)
7600                 stat->un.b.lsRjtRsnCodeExp = LSEXP_CMD_IN_PROGRESS;
7601
7602         elsiocb->cmd_cmpl = lpfc_cmpl_els_rsp;
7603         phba->fc_stat.elsXmitLSRJT++;
7604         elsiocb->ndlp = lpfc_nlp_get(ndlp);
7605         if (!elsiocb->ndlp) {
7606                 lpfc_els_free_iocb(phba, elsiocb);
7607                 goto free_lcb_context;
7608         }
7609
7610         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
7611         if (rc == IOCB_ERROR) {
7612                 lpfc_els_free_iocb(phba, elsiocb);
7613                 lpfc_nlp_put(ndlp);
7614         }
7615 free_lcb_context:
7616         kfree(lcb_context);
7617 }
7618
7619 static int
7620 lpfc_sli4_set_beacon(struct lpfc_vport *vport,
7621                      struct lpfc_lcb_context *lcb_context,
7622                      uint32_t beacon_state)
7623 {
7624         struct lpfc_hba *phba = vport->phba;
7625         union lpfc_sli4_cfg_shdr *cfg_shdr;
7626         LPFC_MBOXQ_t *mbox = NULL;
7627         uint32_t len;
7628         int rc;
7629
7630         mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
7631         if (!mbox)
7632                 return 1;
7633
7634         cfg_shdr = &mbox->u.mqe.un.sli4_config.header.cfg_shdr;
7635         len = sizeof(struct lpfc_mbx_set_beacon_config) -
7636                 sizeof(struct lpfc_sli4_cfg_mhdr);
7637         lpfc_sli4_config(phba, mbox, LPFC_MBOX_SUBSYSTEM_COMMON,
7638                          LPFC_MBOX_OPCODE_SET_BEACON_CONFIG, len,
7639                          LPFC_SLI4_MBX_EMBED);
7640         mbox->ctx_ndlp = (void *)lcb_context;
7641         mbox->vport = phba->pport;
7642         mbox->mbox_cmpl = lpfc_els_lcb_rsp;
7643         bf_set(lpfc_mbx_set_beacon_port_num, &mbox->u.mqe.un.beacon_config,
7644                phba->sli4_hba.physical_port);
7645         bf_set(lpfc_mbx_set_beacon_state, &mbox->u.mqe.un.beacon_config,
7646                beacon_state);
7647         mbox->u.mqe.un.beacon_config.word5 = 0;         /* Reserved */
7648
7649         /*
7650          *      Check bv1s bit before issuing the mailbox
7651          *      if bv1s == 1, LCB V1 supported
7652          *      else, LCB V0 supported
7653          */
7654
7655         if (phba->sli4_hba.pc_sli4_params.bv1s) {
7656                 /* COMMON_SET_BEACON_CONFIG_V1 */
7657                 cfg_shdr->request.word9 = BEACON_VERSION_V1;
7658                 lcb_context->capability |= LCB_CAPABILITY_DURATION;
7659                 bf_set(lpfc_mbx_set_beacon_port_type,
7660                        &mbox->u.mqe.un.beacon_config, 0);
7661                 bf_set(lpfc_mbx_set_beacon_duration_v1,
7662                        &mbox->u.mqe.un.beacon_config,
7663                        be16_to_cpu(lcb_context->duration));
7664         } else {
7665                 /* COMMON_SET_BEACON_CONFIG_V0 */
7666                 if (be16_to_cpu(lcb_context->duration) != 0) {
7667                         mempool_free(mbox, phba->mbox_mem_pool);
7668                         return 1;
7669                 }
7670                 cfg_shdr->request.word9 = BEACON_VERSION_V0;
7671                 lcb_context->capability &=  ~(LCB_CAPABILITY_DURATION);
7672                 bf_set(lpfc_mbx_set_beacon_state,
7673                        &mbox->u.mqe.un.beacon_config, beacon_state);
7674                 bf_set(lpfc_mbx_set_beacon_port_type,
7675                        &mbox->u.mqe.un.beacon_config, 1);
7676                 bf_set(lpfc_mbx_set_beacon_duration,
7677                        &mbox->u.mqe.un.beacon_config,
7678                        be16_to_cpu(lcb_context->duration));
7679         }
7680
7681         rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
7682         if (rc == MBX_NOT_FINISHED) {
7683                 mempool_free(mbox, phba->mbox_mem_pool);
7684                 return 1;
7685         }
7686
7687         return 0;
7688 }
7689
7690
7691 /**
7692  * lpfc_els_rcv_lcb - Process an unsolicited LCB
7693  * @vport: pointer to a host virtual N_Port data structure.
7694  * @cmdiocb: pointer to lpfc command iocb data structure.
7695  * @ndlp: pointer to a node-list data structure.
7696  *
7697  * This routine processes an unsolicited LCB(LINK CABLE BEACON) IOCB.
7698  * First, the payload of the unsolicited LCB is checked.
7699  * Then based on Subcommand beacon will either turn on or off.
7700  *
7701  * Return code
7702  * 0 - Sent the acc response
7703  * 1 - Sent the reject response.
7704  **/
7705 static int
7706 lpfc_els_rcv_lcb(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
7707                  struct lpfc_nodelist *ndlp)
7708 {
7709         struct lpfc_hba *phba = vport->phba;
7710         struct lpfc_dmabuf *pcmd;
7711         uint8_t *lp;
7712         struct fc_lcb_request_frame *beacon;
7713         struct lpfc_lcb_context *lcb_context;
7714         u8 state, rjt_err = 0;
7715         struct ls_rjt stat;
7716
7717         pcmd = cmdiocb->cmd_dmabuf;
7718         lp = (uint8_t *)pcmd->virt;
7719         beacon = (struct fc_lcb_request_frame *)pcmd->virt;
7720
7721         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
7722                         "0192 ELS LCB Data x%x x%x x%x x%x sub x%x "
7723                         "type x%x frequency %x duration x%x\n",
7724                         lp[0], lp[1], lp[2],
7725                         beacon->lcb_command,
7726                         beacon->lcb_sub_command,
7727                         beacon->lcb_type,
7728                         beacon->lcb_frequency,
7729                         be16_to_cpu(beacon->lcb_duration));
7730
7731         if (beacon->lcb_sub_command != LPFC_LCB_ON &&
7732             beacon->lcb_sub_command != LPFC_LCB_OFF) {
7733                 rjt_err = LSRJT_CMD_UNSUPPORTED;
7734                 goto rjt;
7735         }
7736
7737         if (phba->sli_rev < LPFC_SLI_REV4  ||
7738             phba->hba_flag & HBA_FCOE_MODE ||
7739             (bf_get(lpfc_sli_intf_if_type, &phba->sli4_hba.sli_intf) <
7740             LPFC_SLI_INTF_IF_TYPE_2)) {
7741                 rjt_err = LSRJT_CMD_UNSUPPORTED;
7742                 goto rjt;
7743         }
7744
7745         lcb_context = kmalloc(sizeof(*lcb_context), GFP_KERNEL);
7746         if (!lcb_context) {
7747                 rjt_err = LSRJT_UNABLE_TPC;
7748                 goto rjt;
7749         }
7750
7751         state = (beacon->lcb_sub_command == LPFC_LCB_ON) ? 1 : 0;
7752         lcb_context->sub_command = beacon->lcb_sub_command;
7753         lcb_context->capability = 0;
7754         lcb_context->type = beacon->lcb_type;
7755         lcb_context->frequency = beacon->lcb_frequency;
7756         lcb_context->duration = beacon->lcb_duration;
7757         lcb_context->ox_id = get_job_rcvoxid(phba, cmdiocb);
7758         lcb_context->rx_id = get_job_ulpcontext(phba, cmdiocb);
7759         lcb_context->ndlp = lpfc_nlp_get(ndlp);
7760         if (!lcb_context->ndlp) {
7761                 rjt_err = LSRJT_UNABLE_TPC;
7762                 goto rjt_free;
7763         }
7764
7765         if (lpfc_sli4_set_beacon(vport, lcb_context, state)) {
7766                 lpfc_printf_vlog(ndlp->vport, KERN_ERR, LOG_TRACE_EVENT,
7767                                  "0193 failed to send mail box");
7768                 lpfc_nlp_put(ndlp);
7769                 rjt_err = LSRJT_UNABLE_TPC;
7770                 goto rjt_free;
7771         }
7772         return 0;
7773
7774 rjt_free:
7775         kfree(lcb_context);
7776 rjt:
7777         memset(&stat, 0, sizeof(stat));
7778         stat.un.b.lsRjtRsnCode = rjt_err;
7779         lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
7780         return 1;
7781 }
7782
7783
7784 /**
7785  * lpfc_els_flush_rscn - Clean up any rscn activities with a vport
7786  * @vport: pointer to a host virtual N_Port data structure.
7787  *
7788  * This routine cleans up any Registration State Change Notification
7789  * (RSCN) activity with a @vport. Note that the fc_rscn_flush flag of the
7790  * @vport together with the host_lock is used to prevent multiple thread
7791  * trying to access the RSCN array on a same @vport at the same time.
7792  **/
7793 void
7794 lpfc_els_flush_rscn(struct lpfc_vport *vport)
7795 {
7796         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
7797         struct lpfc_hba  *phba = vport->phba;
7798         int i;
7799
7800         spin_lock_irq(shost->host_lock);
7801         if (vport->fc_rscn_flush) {
7802                 /* Another thread is walking fc_rscn_id_list on this vport */
7803                 spin_unlock_irq(shost->host_lock);
7804                 return;
7805         }
7806         /* Indicate we are walking lpfc_els_flush_rscn on this vport */
7807         vport->fc_rscn_flush = 1;
7808         spin_unlock_irq(shost->host_lock);
7809
7810         for (i = 0; i < vport->fc_rscn_id_cnt; i++) {
7811                 lpfc_in_buf_free(phba, vport->fc_rscn_id_list[i]);
7812                 vport->fc_rscn_id_list[i] = NULL;
7813         }
7814         spin_lock_irq(shost->host_lock);
7815         vport->fc_rscn_id_cnt = 0;
7816         vport->fc_flag &= ~(FC_RSCN_MODE | FC_RSCN_DISCOVERY);
7817         spin_unlock_irq(shost->host_lock);
7818         lpfc_can_disctmo(vport);
7819         /* Indicate we are done walking this fc_rscn_id_list */
7820         vport->fc_rscn_flush = 0;
7821 }
7822
7823 /**
7824  * lpfc_rscn_payload_check - Check whether there is a pending rscn to a did
7825  * @vport: pointer to a host virtual N_Port data structure.
7826  * @did: remote destination port identifier.
7827  *
7828  * This routine checks whether there is any pending Registration State
7829  * Configuration Notification (RSCN) to a @did on @vport.
7830  *
7831  * Return code
7832  *   None zero - The @did matched with a pending rscn
7833  *   0 - not able to match @did with a pending rscn
7834  **/
7835 int
7836 lpfc_rscn_payload_check(struct lpfc_vport *vport, uint32_t did)
7837 {
7838         D_ID ns_did;
7839         D_ID rscn_did;
7840         uint32_t *lp;
7841         uint32_t payload_len, i;
7842         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
7843
7844         ns_did.un.word = did;
7845
7846         /* Never match fabric nodes for RSCNs */
7847         if ((did & Fabric_DID_MASK) == Fabric_DID_MASK)
7848                 return 0;
7849
7850         /* If we are doing a FULL RSCN rediscovery, match everything */
7851         if (vport->fc_flag & FC_RSCN_DISCOVERY)
7852                 return did;
7853
7854         spin_lock_irq(shost->host_lock);
7855         if (vport->fc_rscn_flush) {
7856                 /* Another thread is walking fc_rscn_id_list on this vport */
7857                 spin_unlock_irq(shost->host_lock);
7858                 return 0;
7859         }
7860         /* Indicate we are walking fc_rscn_id_list on this vport */
7861         vport->fc_rscn_flush = 1;
7862         spin_unlock_irq(shost->host_lock);
7863         for (i = 0; i < vport->fc_rscn_id_cnt; i++) {
7864                 lp = vport->fc_rscn_id_list[i]->virt;
7865                 payload_len = be32_to_cpu(*lp++ & ~ELS_CMD_MASK);
7866                 payload_len -= sizeof(uint32_t);        /* take off word 0 */
7867                 while (payload_len) {
7868                         rscn_did.un.word = be32_to_cpu(*lp++);
7869                         payload_len -= sizeof(uint32_t);
7870                         switch (rscn_did.un.b.resv & RSCN_ADDRESS_FORMAT_MASK) {
7871                         case RSCN_ADDRESS_FORMAT_PORT:
7872                                 if ((ns_did.un.b.domain == rscn_did.un.b.domain)
7873                                     && (ns_did.un.b.area == rscn_did.un.b.area)
7874                                     && (ns_did.un.b.id == rscn_did.un.b.id))
7875                                         goto return_did_out;
7876                                 break;
7877                         case RSCN_ADDRESS_FORMAT_AREA:
7878                                 if ((ns_did.un.b.domain == rscn_did.un.b.domain)
7879                                     && (ns_did.un.b.area == rscn_did.un.b.area))
7880                                         goto return_did_out;
7881                                 break;
7882                         case RSCN_ADDRESS_FORMAT_DOMAIN:
7883                                 if (ns_did.un.b.domain == rscn_did.un.b.domain)
7884                                         goto return_did_out;
7885                                 break;
7886                         case RSCN_ADDRESS_FORMAT_FABRIC:
7887                                 goto return_did_out;
7888                         }
7889                 }
7890         }
7891         /* Indicate we are done with walking fc_rscn_id_list on this vport */
7892         vport->fc_rscn_flush = 0;
7893         return 0;
7894 return_did_out:
7895         /* Indicate we are done with walking fc_rscn_id_list on this vport */
7896         vport->fc_rscn_flush = 0;
7897         return did;
7898 }
7899
7900 /**
7901  * lpfc_rscn_recovery_check - Send recovery event to vport nodes matching rscn
7902  * @vport: pointer to a host virtual N_Port data structure.
7903  *
7904  * This routine sends recovery (NLP_EVT_DEVICE_RECOVERY) event to the
7905  * state machine for a @vport's nodes that are with pending RSCN (Registration
7906  * State Change Notification).
7907  *
7908  * Return code
7909  *   0 - Successful (currently alway return 0)
7910  **/
7911 static int
7912 lpfc_rscn_recovery_check(struct lpfc_vport *vport)
7913 {
7914         struct lpfc_nodelist *ndlp = NULL, *n;
7915
7916         /* Move all affected nodes by pending RSCNs to NPR state. */
7917         list_for_each_entry_safe(ndlp, n, &vport->fc_nodes, nlp_listp) {
7918                 if ((ndlp->nlp_state == NLP_STE_UNUSED_NODE) ||
7919                     !lpfc_rscn_payload_check(vport, ndlp->nlp_DID))
7920                         continue;
7921
7922                 /* NVME Target mode does not do RSCN Recovery. */
7923                 if (vport->phba->nvmet_support)
7924                         continue;
7925
7926                 /* If we are in the process of doing discovery on this
7927                  * NPort, let it continue on its own.
7928                  */
7929                 switch (ndlp->nlp_state) {
7930                 case  NLP_STE_PLOGI_ISSUE:
7931                 case  NLP_STE_ADISC_ISSUE:
7932                 case  NLP_STE_REG_LOGIN_ISSUE:
7933                 case  NLP_STE_PRLI_ISSUE:
7934                 case  NLP_STE_LOGO_ISSUE:
7935                         continue;
7936                 }
7937
7938                 lpfc_disc_state_machine(vport, ndlp, NULL,
7939                                         NLP_EVT_DEVICE_RECOVERY);
7940                 lpfc_cancel_retry_delay_tmo(vport, ndlp);
7941         }
7942         return 0;
7943 }
7944
7945 /**
7946  * lpfc_send_rscn_event - Send an RSCN event to management application
7947  * @vport: pointer to a host virtual N_Port data structure.
7948  * @cmdiocb: pointer to lpfc command iocb data structure.
7949  *
7950  * lpfc_send_rscn_event sends an RSCN netlink event to management
7951  * applications.
7952  */
7953 static void
7954 lpfc_send_rscn_event(struct lpfc_vport *vport,
7955                 struct lpfc_iocbq *cmdiocb)
7956 {
7957         struct lpfc_dmabuf *pcmd;
7958         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
7959         uint32_t *payload_ptr;
7960         uint32_t payload_len;
7961         struct lpfc_rscn_event_header *rscn_event_data;
7962
7963         pcmd = cmdiocb->cmd_dmabuf;
7964         payload_ptr = (uint32_t *) pcmd->virt;
7965         payload_len = be32_to_cpu(*payload_ptr & ~ELS_CMD_MASK);
7966
7967         rscn_event_data = kmalloc(sizeof(struct lpfc_rscn_event_header) +
7968                 payload_len, GFP_KERNEL);
7969         if (!rscn_event_data) {
7970                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
7971                         "0147 Failed to allocate memory for RSCN event\n");
7972                 return;
7973         }
7974         rscn_event_data->event_type = FC_REG_RSCN_EVENT;
7975         rscn_event_data->payload_length = payload_len;
7976         memcpy(rscn_event_data->rscn_payload, payload_ptr,
7977                 payload_len);
7978
7979         fc_host_post_vendor_event(shost,
7980                 fc_get_event_number(),
7981                 sizeof(struct lpfc_rscn_event_header) + payload_len,
7982                 (char *)rscn_event_data,
7983                 LPFC_NL_VENDOR_ID);
7984
7985         kfree(rscn_event_data);
7986 }
7987
7988 /**
7989  * lpfc_els_rcv_rscn - Process an unsolicited rscn iocb
7990  * @vport: pointer to a host virtual N_Port data structure.
7991  * @cmdiocb: pointer to lpfc command iocb data structure.
7992  * @ndlp: pointer to a node-list data structure.
7993  *
7994  * This routine processes an unsolicited RSCN (Registration State Change
7995  * Notification) IOCB. First, the payload of the unsolicited RSCN is walked
7996  * to invoke fc_host_post_event() routine to the FC transport layer. If the
7997  * discover state machine is about to begin discovery, it just accepts the
7998  * RSCN and the discovery process will satisfy the RSCN. If this RSCN only
7999  * contains N_Port IDs for other vports on this HBA, it just accepts the
8000  * RSCN and ignore processing it. If the state machine is in the recovery
8001  * state, the fc_rscn_id_list of this @vport is walked and the
8002  * lpfc_rscn_recovery_check() routine is invoked to send recovery event for
8003  * all nodes that match RSCN payload. Otherwise, the lpfc_els_handle_rscn()
8004  * routine is invoked to handle the RSCN event.
8005  *
8006  * Return code
8007  *   0 - Just sent the acc response
8008  *   1 - Sent the acc response and waited for name server completion
8009  **/
8010 static int
8011 lpfc_els_rcv_rscn(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
8012                   struct lpfc_nodelist *ndlp)
8013 {
8014         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
8015         struct lpfc_hba  *phba = vport->phba;
8016         struct lpfc_dmabuf *pcmd;
8017         uint32_t *lp, *datap;
8018         uint32_t payload_len, length, nportid, *cmd;
8019         int rscn_cnt;
8020         int rscn_id = 0, hba_id = 0;
8021         int i, tmo;
8022
8023         pcmd = cmdiocb->cmd_dmabuf;
8024         lp = (uint32_t *) pcmd->virt;
8025
8026         payload_len = be32_to_cpu(*lp++ & ~ELS_CMD_MASK);
8027         payload_len -= sizeof(uint32_t);        /* take off word 0 */
8028         /* RSCN received */
8029         lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
8030                          "0214 RSCN received Data: x%x x%x x%x x%x\n",
8031                          vport->fc_flag, payload_len, *lp,
8032                          vport->fc_rscn_id_cnt);
8033
8034         /* Send an RSCN event to the management application */
8035         lpfc_send_rscn_event(vport, cmdiocb);
8036
8037         for (i = 0; i < payload_len/sizeof(uint32_t); i++)
8038                 fc_host_post_event(shost, fc_get_event_number(),
8039                         FCH_EVT_RSCN, lp[i]);
8040
8041         /* Check if RSCN is coming from a direct-connected remote NPort */
8042         if (vport->fc_flag & FC_PT2PT) {
8043                 /* If so, just ACC it, no other action needed for now */
8044                 lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
8045                                  "2024 pt2pt RSCN %08x Data: x%x x%x\n",
8046                                  *lp, vport->fc_flag, payload_len);
8047                 lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
8048
8049                 /* Check to see if we need to NVME rescan this target
8050                  * remoteport.
8051                  */
8052                 if (ndlp->nlp_fc4_type & NLP_FC4_NVME &&
8053                     ndlp->nlp_type & (NLP_NVME_TARGET | NLP_NVME_DISCOVERY))
8054                         lpfc_nvme_rescan_port(vport, ndlp);
8055                 return 0;
8056         }
8057
8058         /* If we are about to begin discovery, just ACC the RSCN.
8059          * Discovery processing will satisfy it.
8060          */
8061         if (vport->port_state <= LPFC_NS_QRY) {
8062                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
8063                         "RCV RSCN ignore: did:x%x/ste:x%x flg:x%x",
8064                         ndlp->nlp_DID, vport->port_state, ndlp->nlp_flag);
8065
8066                 lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
8067                 return 0;
8068         }
8069
8070         /* If this RSCN just contains NPortIDs for other vports on this HBA,
8071          * just ACC and ignore it.
8072          */
8073         if ((phba->sli3_options & LPFC_SLI3_NPIV_ENABLED) &&
8074                 !(vport->cfg_peer_port_login)) {
8075                 i = payload_len;
8076                 datap = lp;
8077                 while (i > 0) {
8078                         nportid = *datap++;
8079                         nportid = ((be32_to_cpu(nportid)) & Mask_DID);
8080                         i -= sizeof(uint32_t);
8081                         rscn_id++;
8082                         if (lpfc_find_vport_by_did(phba, nportid))
8083                                 hba_id++;
8084                 }
8085                 if (rscn_id == hba_id) {
8086                         /* ALL NPortIDs in RSCN are on HBA */
8087                         lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
8088                                          "0219 Ignore RSCN "
8089                                          "Data: x%x x%x x%x x%x\n",
8090                                          vport->fc_flag, payload_len,
8091                                          *lp, vport->fc_rscn_id_cnt);
8092                         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
8093                                 "RCV RSCN vport:  did:x%x/ste:x%x flg:x%x",
8094                                 ndlp->nlp_DID, vport->port_state,
8095                                 ndlp->nlp_flag);
8096
8097                         lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb,
8098                                 ndlp, NULL);
8099                         /* Restart disctmo if its already running */
8100                         if (vport->fc_flag & FC_DISC_TMO) {
8101                                 tmo = ((phba->fc_ratov * 3) + 3);
8102                                 mod_timer(&vport->fc_disctmo,
8103                                           jiffies +
8104                                           msecs_to_jiffies(1000 * tmo));
8105                         }
8106                         return 0;
8107                 }
8108         }
8109
8110         spin_lock_irq(shost->host_lock);
8111         if (vport->fc_rscn_flush) {
8112                 /* Another thread is walking fc_rscn_id_list on this vport */
8113                 vport->fc_flag |= FC_RSCN_DISCOVERY;
8114                 spin_unlock_irq(shost->host_lock);
8115                 /* Send back ACC */
8116                 lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
8117                 return 0;
8118         }
8119         /* Indicate we are walking fc_rscn_id_list on this vport */
8120         vport->fc_rscn_flush = 1;
8121         spin_unlock_irq(shost->host_lock);
8122         /* Get the array count after successfully have the token */
8123         rscn_cnt = vport->fc_rscn_id_cnt;
8124         /* If we are already processing an RSCN, save the received
8125          * RSCN payload buffer, cmdiocb->cmd_dmabuf to process later.
8126          */
8127         if (vport->fc_flag & (FC_RSCN_MODE | FC_NDISC_ACTIVE)) {
8128                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
8129                         "RCV RSCN defer:  did:x%x/ste:x%x flg:x%x",
8130                         ndlp->nlp_DID, vport->port_state, ndlp->nlp_flag);
8131
8132                 spin_lock_irq(shost->host_lock);
8133                 vport->fc_flag |= FC_RSCN_DEFERRED;
8134
8135                 /* Restart disctmo if its already running */
8136                 if (vport->fc_flag & FC_DISC_TMO) {
8137                         tmo = ((phba->fc_ratov * 3) + 3);
8138                         mod_timer(&vport->fc_disctmo,
8139                                   jiffies + msecs_to_jiffies(1000 * tmo));
8140                 }
8141                 if ((rscn_cnt < FC_MAX_HOLD_RSCN) &&
8142                     !(vport->fc_flag & FC_RSCN_DISCOVERY)) {
8143                         vport->fc_flag |= FC_RSCN_MODE;
8144                         spin_unlock_irq(shost->host_lock);
8145                         if (rscn_cnt) {
8146                                 cmd = vport->fc_rscn_id_list[rscn_cnt-1]->virt;
8147                                 length = be32_to_cpu(*cmd & ~ELS_CMD_MASK);
8148                         }
8149                         if ((rscn_cnt) &&
8150                             (payload_len + length <= LPFC_BPL_SIZE)) {
8151                                 *cmd &= ELS_CMD_MASK;
8152                                 *cmd |= cpu_to_be32(payload_len + length);
8153                                 memcpy(((uint8_t *)cmd) + length, lp,
8154                                        payload_len);
8155                         } else {
8156                                 vport->fc_rscn_id_list[rscn_cnt] = pcmd;
8157                                 vport->fc_rscn_id_cnt++;
8158                                 /* If we zero, cmdiocb->cmd_dmabuf, the calling
8159                                  * routine will not try to free it.
8160                                  */
8161                                 cmdiocb->cmd_dmabuf = NULL;
8162                         }
8163                         /* Deferred RSCN */
8164                         lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
8165                                          "0235 Deferred RSCN "
8166                                          "Data: x%x x%x x%x\n",
8167                                          vport->fc_rscn_id_cnt, vport->fc_flag,
8168                                          vport->port_state);
8169                 } else {
8170                         vport->fc_flag |= FC_RSCN_DISCOVERY;
8171                         spin_unlock_irq(shost->host_lock);
8172                         /* ReDiscovery RSCN */
8173                         lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
8174                                          "0234 ReDiscovery RSCN "
8175                                          "Data: x%x x%x x%x\n",
8176                                          vport->fc_rscn_id_cnt, vport->fc_flag,
8177                                          vport->port_state);
8178                 }
8179                 /* Indicate we are done walking fc_rscn_id_list on this vport */
8180                 vport->fc_rscn_flush = 0;
8181                 /* Send back ACC */
8182                 lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
8183                 /* send RECOVERY event for ALL nodes that match RSCN payload */
8184                 lpfc_rscn_recovery_check(vport);
8185                 return 0;
8186         }
8187         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
8188                 "RCV RSCN:        did:x%x/ste:x%x flg:x%x",
8189                 ndlp->nlp_DID, vport->port_state, ndlp->nlp_flag);
8190
8191         spin_lock_irq(shost->host_lock);
8192         vport->fc_flag |= FC_RSCN_MODE;
8193         spin_unlock_irq(shost->host_lock);
8194         vport->fc_rscn_id_list[vport->fc_rscn_id_cnt++] = pcmd;
8195         /* Indicate we are done walking fc_rscn_id_list on this vport */
8196         vport->fc_rscn_flush = 0;
8197         /*
8198          * If we zero, cmdiocb->cmd_dmabuf, the calling routine will
8199          * not try to free it.
8200          */
8201         cmdiocb->cmd_dmabuf = NULL;
8202         lpfc_set_disctmo(vport);
8203         /* Send back ACC */
8204         lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
8205         /* send RECOVERY event for ALL nodes that match RSCN payload */
8206         lpfc_rscn_recovery_check(vport);
8207         return lpfc_els_handle_rscn(vport);
8208 }
8209
8210 /**
8211  * lpfc_els_handle_rscn - Handle rscn for a vport
8212  * @vport: pointer to a host virtual N_Port data structure.
8213  *
8214  * This routine handles the Registration State Configuration Notification
8215  * (RSCN) for a @vport. If login to NameServer does not exist, a new ndlp shall
8216  * be created and a Port Login (PLOGI) to the NameServer is issued. Otherwise,
8217  * if the ndlp to NameServer exists, a Common Transport (CT) command to the
8218  * NameServer shall be issued. If CT command to the NameServer fails to be
8219  * issued, the lpfc_els_flush_rscn() routine shall be invoked to clean up any
8220  * RSCN activities with the @vport.
8221  *
8222  * Return code
8223  *   0 - Cleaned up rscn on the @vport
8224  *   1 - Wait for plogi to name server before proceed
8225  **/
8226 int
8227 lpfc_els_handle_rscn(struct lpfc_vport *vport)
8228 {
8229         struct lpfc_nodelist *ndlp;
8230         struct lpfc_hba  *phba = vport->phba;
8231
8232         /* Ignore RSCN if the port is being torn down. */
8233         if (vport->load_flag & FC_UNLOADING) {
8234                 lpfc_els_flush_rscn(vport);
8235                 return 0;
8236         }
8237
8238         /* Start timer for RSCN processing */
8239         lpfc_set_disctmo(vport);
8240
8241         /* RSCN processed */
8242         lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
8243                          "0215 RSCN processed Data: x%x x%x x%x x%x x%x x%x\n",
8244                          vport->fc_flag, 0, vport->fc_rscn_id_cnt,
8245                          vport->port_state, vport->num_disc_nodes,
8246                          vport->gidft_inp);
8247
8248         /* To process RSCN, first compare RSCN data with NameServer */
8249         vport->fc_ns_retry = 0;
8250         vport->num_disc_nodes = 0;
8251
8252         ndlp = lpfc_findnode_did(vport, NameServer_DID);
8253         if (ndlp && ndlp->nlp_state == NLP_STE_UNMAPPED_NODE) {
8254                 /* Good ndlp, issue CT Request to NameServer.  Need to
8255                  * know how many gidfts were issued.  If none, then just
8256                  * flush the RSCN.  Otherwise, the outstanding requests
8257                  * need to complete.
8258                  */
8259                 if (phba->cfg_ns_query == LPFC_NS_QUERY_GID_FT) {
8260                         if (lpfc_issue_gidft(vport) > 0)
8261                                 return 1;
8262                 } else if (phba->cfg_ns_query == LPFC_NS_QUERY_GID_PT) {
8263                         if (lpfc_issue_gidpt(vport) > 0)
8264                                 return 1;
8265                 } else {
8266                         return 1;
8267                 }
8268         } else {
8269                 /* Nameserver login in question.  Revalidate. */
8270                 if (ndlp) {
8271                         ndlp->nlp_prev_state = NLP_STE_UNUSED_NODE;
8272                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
8273                 } else {
8274                         ndlp = lpfc_nlp_init(vport, NameServer_DID);
8275                         if (!ndlp) {
8276                                 lpfc_els_flush_rscn(vport);
8277                                 return 0;
8278                         }
8279                         ndlp->nlp_prev_state = ndlp->nlp_state;
8280                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
8281                 }
8282                 ndlp->nlp_type |= NLP_FABRIC;
8283                 lpfc_issue_els_plogi(vport, NameServer_DID, 0);
8284                 /* Wait for NameServer login cmpl before we can
8285                  * continue
8286                  */
8287                 return 1;
8288         }
8289
8290         lpfc_els_flush_rscn(vport);
8291         return 0;
8292 }
8293
8294 /**
8295  * lpfc_els_rcv_flogi - Process an unsolicited flogi iocb
8296  * @vport: pointer to a host virtual N_Port data structure.
8297  * @cmdiocb: pointer to lpfc command iocb data structure.
8298  * @ndlp: pointer to a node-list data structure.
8299  *
8300  * This routine processes Fabric Login (FLOGI) IOCB received as an ELS
8301  * unsolicited event. An unsolicited FLOGI can be received in a point-to-
8302  * point topology. As an unsolicited FLOGI should not be received in a loop
8303  * mode, any unsolicited FLOGI received in loop mode shall be ignored. The
8304  * lpfc_check_sparm() routine is invoked to check the parameters in the
8305  * unsolicited FLOGI. If parameters validation failed, the routine
8306  * lpfc_els_rsp_reject() shall be called with reject reason code set to
8307  * LSEXP_SPARM_OPTIONS to reject the FLOGI. Otherwise, the Port WWN in the
8308  * FLOGI shall be compared with the Port WWN of the @vport to determine who
8309  * will initiate PLOGI. The higher lexicographical value party shall has
8310  * higher priority (as the winning port) and will initiate PLOGI and
8311  * communicate Port_IDs (Addresses) for both nodes in PLOGI. The result
8312  * of this will be marked in the @vport fc_flag field with FC_PT2PT_PLOGI
8313  * and then the lpfc_els_rsp_acc() routine is invoked to accept the FLOGI.
8314  *
8315  * Return code
8316  *   0 - Successfully processed the unsolicited flogi
8317  *   1 - Failed to process the unsolicited flogi
8318  **/
8319 static int
8320 lpfc_els_rcv_flogi(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
8321                    struct lpfc_nodelist *ndlp)
8322 {
8323         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
8324         struct lpfc_hba  *phba = vport->phba;
8325         struct lpfc_dmabuf *pcmd = cmdiocb->cmd_dmabuf;
8326         uint32_t *lp = (uint32_t *) pcmd->virt;
8327         union lpfc_wqe128 *wqe = &cmdiocb->wqe;
8328         struct serv_parm *sp;
8329         LPFC_MBOXQ_t *mbox;
8330         uint32_t cmd, did;
8331         int rc;
8332         uint32_t fc_flag = 0;
8333         uint32_t port_state = 0;
8334
8335         /* Clear external loopback plug detected flag */
8336         phba->link_flag &= ~LS_EXTERNAL_LOOPBACK;
8337
8338         cmd = *lp++;
8339         sp = (struct serv_parm *) lp;
8340
8341         /* FLOGI received */
8342
8343         lpfc_set_disctmo(vport);
8344
8345         if (phba->fc_topology == LPFC_TOPOLOGY_LOOP) {
8346                 /* We should never receive a FLOGI in loop mode, ignore it */
8347                 did =  bf_get(wqe_els_did, &wqe->xmit_els_rsp.wqe_dest);
8348
8349                 /* An FLOGI ELS command <elsCmd> was received from DID <did> in
8350                    Loop Mode */
8351                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
8352                                  "0113 An FLOGI ELS command x%x was "
8353                                  "received from DID x%x in Loop Mode\n",
8354                                  cmd, did);
8355                 return 1;
8356         }
8357
8358         (void) lpfc_check_sparm(vport, ndlp, sp, CLASS3, 1);
8359
8360         /*
8361          * If our portname is greater than the remote portname,
8362          * then we initiate Nport login.
8363          */
8364
8365         rc = memcmp(&vport->fc_portname, &sp->portName,
8366                     sizeof(struct lpfc_name));
8367
8368         if (!rc) {
8369                 if (phba->sli_rev < LPFC_SLI_REV4) {
8370                         mbox = mempool_alloc(phba->mbox_mem_pool,
8371                                              GFP_KERNEL);
8372                         if (!mbox)
8373                                 return 1;
8374                         lpfc_linkdown(phba);
8375                         lpfc_init_link(phba, mbox,
8376                                        phba->cfg_topology,
8377                                        phba->cfg_link_speed);
8378                         mbox->u.mb.un.varInitLnk.lipsr_AL_PA = 0;
8379                         mbox->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
8380                         mbox->vport = vport;
8381                         rc = lpfc_sli_issue_mbox(phba, mbox,
8382                                                  MBX_NOWAIT);
8383                         lpfc_set_loopback_flag(phba);
8384                         if (rc == MBX_NOT_FINISHED)
8385                                 mempool_free(mbox, phba->mbox_mem_pool);
8386                         return 1;
8387                 }
8388
8389                 /* External loopback plug insertion detected */
8390                 phba->link_flag |= LS_EXTERNAL_LOOPBACK;
8391
8392                 lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS | LOG_LIBDFC,
8393                                  "1119 External Loopback plug detected\n");
8394
8395                 /* abort the flogi coming back to ourselves
8396                  * due to external loopback on the port.
8397                  */
8398                 lpfc_els_abort_flogi(phba);
8399                 return 0;
8400
8401         } else if (rc > 0) {    /* greater than */
8402                 spin_lock_irq(shost->host_lock);
8403                 vport->fc_flag |= FC_PT2PT_PLOGI;
8404                 spin_unlock_irq(shost->host_lock);
8405
8406                 /* If we have the high WWPN we can assign our own
8407                  * myDID; otherwise, we have to WAIT for a PLOGI
8408                  * from the remote NPort to find out what it
8409                  * will be.
8410                  */
8411                 vport->fc_myDID = PT2PT_LocalID;
8412         } else {
8413                 vport->fc_myDID = PT2PT_RemoteID;
8414         }
8415
8416         /*
8417          * The vport state should go to LPFC_FLOGI only
8418          * AFTER we issue a FLOGI, not receive one.
8419          */
8420         spin_lock_irq(shost->host_lock);
8421         fc_flag = vport->fc_flag;
8422         port_state = vport->port_state;
8423         vport->fc_flag |= FC_PT2PT;
8424         vport->fc_flag &= ~(FC_FABRIC | FC_PUBLIC_LOOP);
8425
8426         /* Acking an unsol FLOGI.  Count 1 for link bounce
8427          * work-around.
8428          */
8429         vport->rcv_flogi_cnt++;
8430         spin_unlock_irq(shost->host_lock);
8431         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
8432                          "3311 Rcv Flogi PS x%x new PS x%x "
8433                          "fc_flag x%x new fc_flag x%x\n",
8434                          port_state, vport->port_state,
8435                          fc_flag, vport->fc_flag);
8436
8437         /*
8438          * We temporarily set fc_myDID to make it look like we are
8439          * a Fabric. This is done just so we end up with the right
8440          * did / sid on the FLOGI ACC rsp.
8441          */
8442         did = vport->fc_myDID;
8443         vport->fc_myDID = Fabric_DID;
8444
8445         memcpy(&phba->fc_fabparam, sp, sizeof(struct serv_parm));
8446
8447         /* Defer ACC response until AFTER we issue a FLOGI */
8448         if (!(phba->hba_flag & HBA_FLOGI_ISSUED)) {
8449                 phba->defer_flogi_acc_rx_id = bf_get(wqe_ctxt_tag,
8450                                                      &wqe->xmit_els_rsp.wqe_com);
8451                 phba->defer_flogi_acc_ox_id = bf_get(wqe_rcvoxid,
8452                                                      &wqe->xmit_els_rsp.wqe_com);
8453
8454                 vport->fc_myDID = did;
8455
8456                 lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
8457                                  "3344 Deferring FLOGI ACC: rx_id: x%x,"
8458                                  " ox_id: x%x, hba_flag x%x\n",
8459                                  phba->defer_flogi_acc_rx_id,
8460                                  phba->defer_flogi_acc_ox_id, phba->hba_flag);
8461
8462                 phba->defer_flogi_acc_flag = true;
8463
8464                 return 0;
8465         }
8466
8467         /* Send back ACC */
8468         lpfc_els_rsp_acc(vport, ELS_CMD_FLOGI, cmdiocb, ndlp, NULL);
8469
8470         /* Now lets put fc_myDID back to what its supposed to be */
8471         vport->fc_myDID = did;
8472
8473         return 0;
8474 }
8475
8476 /**
8477  * lpfc_els_rcv_rnid - Process an unsolicited rnid iocb
8478  * @vport: pointer to a host virtual N_Port data structure.
8479  * @cmdiocb: pointer to lpfc command iocb data structure.
8480  * @ndlp: pointer to a node-list data structure.
8481  *
8482  * This routine processes Request Node Identification Data (RNID) IOCB
8483  * received as an ELS unsolicited event. Only when the RNID specified format
8484  * 0x0 or 0xDF (Topology Discovery Specific Node Identification Data)
8485  * present, this routine will invoke the lpfc_els_rsp_rnid_acc() routine to
8486  * Accept (ACC) the RNID ELS command. All the other RNID formats are
8487  * rejected by invoking the lpfc_els_rsp_reject() routine.
8488  *
8489  * Return code
8490  *   0 - Successfully processed rnid iocb (currently always return 0)
8491  **/
8492 static int
8493 lpfc_els_rcv_rnid(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
8494                   struct lpfc_nodelist *ndlp)
8495 {
8496         struct lpfc_dmabuf *pcmd;
8497         uint32_t *lp;
8498         RNID *rn;
8499         struct ls_rjt stat;
8500
8501         pcmd = cmdiocb->cmd_dmabuf;
8502         lp = (uint32_t *) pcmd->virt;
8503
8504         lp++;
8505         rn = (RNID *) lp;
8506
8507         /* RNID received */
8508
8509         switch (rn->Format) {
8510         case 0:
8511         case RNID_TOPOLOGY_DISC:
8512                 /* Send back ACC */
8513                 lpfc_els_rsp_rnid_acc(vport, rn->Format, cmdiocb, ndlp);
8514                 break;
8515         default:
8516                 /* Reject this request because format not supported */
8517                 stat.un.b.lsRjtRsvd0 = 0;
8518                 stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
8519                 stat.un.b.lsRjtRsnCodeExp = LSEXP_CANT_GIVE_DATA;
8520                 stat.un.b.vendorUnique = 0;
8521                 lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp,
8522                         NULL);
8523         }
8524         return 0;
8525 }
8526
8527 /**
8528  * lpfc_els_rcv_echo - Process an unsolicited echo iocb
8529  * @vport: pointer to a host virtual N_Port data structure.
8530  * @cmdiocb: pointer to lpfc command iocb data structure.
8531  * @ndlp: pointer to a node-list data structure.
8532  *
8533  * Return code
8534  *   0 - Successfully processed echo iocb (currently always return 0)
8535  **/
8536 static int
8537 lpfc_els_rcv_echo(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
8538                   struct lpfc_nodelist *ndlp)
8539 {
8540         uint8_t *pcmd;
8541
8542         pcmd = (uint8_t *)cmdiocb->cmd_dmabuf->virt;
8543
8544         /* skip over first word of echo command to find echo data */
8545         pcmd += sizeof(uint32_t);
8546
8547         lpfc_els_rsp_echo_acc(vport, pcmd, cmdiocb, ndlp);
8548         return 0;
8549 }
8550
8551 /**
8552  * lpfc_els_rcv_lirr - Process an unsolicited lirr iocb
8553  * @vport: pointer to a host virtual N_Port data structure.
8554  * @cmdiocb: pointer to lpfc command iocb data structure.
8555  * @ndlp: pointer to a node-list data structure.
8556  *
8557  * This routine processes a Link Incident Report Registration(LIRR) IOCB
8558  * received as an ELS unsolicited event. Currently, this function just invokes
8559  * the lpfc_els_rsp_reject() routine to reject the LIRR IOCB unconditionally.
8560  *
8561  * Return code
8562  *   0 - Successfully processed lirr iocb (currently always return 0)
8563  **/
8564 static int
8565 lpfc_els_rcv_lirr(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
8566                   struct lpfc_nodelist *ndlp)
8567 {
8568         struct ls_rjt stat;
8569
8570         /* For now, unconditionally reject this command */
8571         stat.un.b.lsRjtRsvd0 = 0;
8572         stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
8573         stat.un.b.lsRjtRsnCodeExp = LSEXP_CANT_GIVE_DATA;
8574         stat.un.b.vendorUnique = 0;
8575         lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
8576         return 0;
8577 }
8578
8579 /**
8580  * lpfc_els_rcv_rrq - Process an unsolicited rrq iocb
8581  * @vport: pointer to a host virtual N_Port data structure.
8582  * @cmdiocb: pointer to lpfc command iocb data structure.
8583  * @ndlp: pointer to a node-list data structure.
8584  *
8585  * This routine processes a Reinstate Recovery Qualifier (RRQ) IOCB
8586  * received as an ELS unsolicited event. A request to RRQ shall only
8587  * be accepted if the Originator Nx_Port N_Port_ID or the Responder
8588  * Nx_Port N_Port_ID of the target Exchange is the same as the
8589  * N_Port_ID of the Nx_Port that makes the request. If the RRQ is
8590  * not accepted, an LS_RJT with reason code "Unable to perform
8591  * command request" and reason code explanation "Invalid Originator
8592  * S_ID" shall be returned. For now, we just unconditionally accept
8593  * RRQ from the target.
8594  **/
8595 static void
8596 lpfc_els_rcv_rrq(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
8597                  struct lpfc_nodelist *ndlp)
8598 {
8599         lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
8600         if (vport->phba->sli_rev == LPFC_SLI_REV4)
8601                 lpfc_els_clear_rrq(vport, cmdiocb, ndlp);
8602 }
8603
8604 /**
8605  * lpfc_els_rsp_rls_acc - Completion callbk func for MBX_READ_LNK_STAT mbox cmd
8606  * @phba: pointer to lpfc hba data structure.
8607  * @pmb: pointer to the driver internal queue element for mailbox command.
8608  *
8609  * This routine is the completion callback function for the MBX_READ_LNK_STAT
8610  * mailbox command. This callback function is to actually send the Accept
8611  * (ACC) response to a Read Link Status (RLS) unsolicited IOCB event. It
8612  * collects the link statistics from the completion of the MBX_READ_LNK_STAT
8613  * mailbox command, constructs the RLS response with the link statistics
8614  * collected, and then invokes the lpfc_sli_issue_iocb() routine to send ACC
8615  * response to the RLS.
8616  *
8617  * Note that the ndlp reference count will be incremented by 1 for holding the
8618  * ndlp and the reference to ndlp will be stored into the ndlp field of
8619  * the IOCB for the completion callback function to the RLS Accept Response
8620  * ELS IOCB command.
8621  *
8622  **/
8623 static void
8624 lpfc_els_rsp_rls_acc(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
8625 {
8626         int rc = 0;
8627         MAILBOX_t *mb;
8628         IOCB_t *icmd;
8629         union lpfc_wqe128 *wqe;
8630         struct RLS_RSP *rls_rsp;
8631         uint8_t *pcmd;
8632         struct lpfc_iocbq *elsiocb;
8633         struct lpfc_nodelist *ndlp;
8634         uint16_t oxid;
8635         uint16_t rxid;
8636         uint32_t cmdsize;
8637         u32 ulp_context;
8638
8639         mb = &pmb->u.mb;
8640
8641         ndlp = pmb->ctx_ndlp;
8642         rxid = (uint16_t)((unsigned long)(pmb->ctx_buf) & 0xffff);
8643         oxid = (uint16_t)(((unsigned long)(pmb->ctx_buf) >> 16) & 0xffff);
8644         pmb->ctx_buf = NULL;
8645         pmb->ctx_ndlp = NULL;
8646
8647         if (mb->mbxStatus) {
8648                 mempool_free(pmb, phba->mbox_mem_pool);
8649                 return;
8650         }
8651
8652         cmdsize = sizeof(struct RLS_RSP) + sizeof(uint32_t);
8653         elsiocb = lpfc_prep_els_iocb(phba->pport, 0, cmdsize,
8654                                      lpfc_max_els_tries, ndlp,
8655                                      ndlp->nlp_DID, ELS_CMD_ACC);
8656
8657         /* Decrement the ndlp reference count from previous mbox command */
8658         lpfc_nlp_put(ndlp);
8659
8660         if (!elsiocb) {
8661                 mempool_free(pmb, phba->mbox_mem_pool);
8662                 return;
8663         }
8664
8665         ulp_context = get_job_ulpcontext(phba, elsiocb);
8666         if (phba->sli_rev == LPFC_SLI_REV4) {
8667                 wqe = &elsiocb->wqe;
8668                 /* Xri / rx_id */
8669                 bf_set(wqe_ctxt_tag, &wqe->generic.wqe_com, rxid);
8670                 bf_set(wqe_rcvoxid, &wqe->xmit_els_rsp.wqe_com, oxid);
8671         } else {
8672                 icmd = &elsiocb->iocb;
8673                 icmd->ulpContext = rxid;
8674                 icmd->unsli3.rcvsli3.ox_id = oxid;
8675         }
8676
8677         pcmd = (uint8_t *)elsiocb->cmd_dmabuf->virt;
8678         *((uint32_t *) (pcmd)) = ELS_CMD_ACC;
8679         pcmd += sizeof(uint32_t); /* Skip past command */
8680         rls_rsp = (struct RLS_RSP *)pcmd;
8681
8682         rls_rsp->linkFailureCnt = cpu_to_be32(mb->un.varRdLnk.linkFailureCnt);
8683         rls_rsp->lossSyncCnt = cpu_to_be32(mb->un.varRdLnk.lossSyncCnt);
8684         rls_rsp->lossSignalCnt = cpu_to_be32(mb->un.varRdLnk.lossSignalCnt);
8685         rls_rsp->primSeqErrCnt = cpu_to_be32(mb->un.varRdLnk.primSeqErrCnt);
8686         rls_rsp->invalidXmitWord = cpu_to_be32(mb->un.varRdLnk.invalidXmitWord);
8687         rls_rsp->crcCnt = cpu_to_be32(mb->un.varRdLnk.crcCnt);
8688         mempool_free(pmb, phba->mbox_mem_pool);
8689         /* Xmit ELS RLS ACC response tag <ulpIoTag> */
8690         lpfc_printf_vlog(ndlp->vport, KERN_INFO, LOG_ELS,
8691                          "2874 Xmit ELS RLS ACC response tag x%x xri x%x, "
8692                          "did x%x, nlp_flag x%x, nlp_state x%x, rpi x%x\n",
8693                          elsiocb->iotag, ulp_context,
8694                          ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
8695                          ndlp->nlp_rpi);
8696         elsiocb->cmd_cmpl = lpfc_cmpl_els_rsp;
8697         phba->fc_stat.elsXmitACC++;
8698         elsiocb->ndlp = lpfc_nlp_get(ndlp);
8699         if (!elsiocb->ndlp) {
8700                 lpfc_els_free_iocb(phba, elsiocb);
8701                 return;
8702         }
8703
8704         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
8705         if (rc == IOCB_ERROR) {
8706                 lpfc_els_free_iocb(phba, elsiocb);
8707                 lpfc_nlp_put(ndlp);
8708         }
8709         return;
8710 }
8711
8712 /**
8713  * lpfc_els_rcv_rls - Process an unsolicited rls iocb
8714  * @vport: pointer to a host virtual N_Port data structure.
8715  * @cmdiocb: pointer to lpfc command iocb data structure.
8716  * @ndlp: pointer to a node-list data structure.
8717  *
8718  * This routine processes Read Link Status (RLS) IOCB received as an
8719  * ELS unsolicited event. It first checks the remote port state. If the
8720  * remote port is not in NLP_STE_UNMAPPED_NODE state or NLP_STE_MAPPED_NODE
8721  * state, it invokes the lpfc_els_rsl_reject() routine to send the reject
8722  * response. Otherwise, it issue the MBX_READ_LNK_STAT mailbox command
8723  * for reading the HBA link statistics. It is for the callback function,
8724  * lpfc_els_rsp_rls_acc(), set to the MBX_READ_LNK_STAT mailbox command
8725  * to actually sending out RPL Accept (ACC) response.
8726  *
8727  * Return codes
8728  *   0 - Successfully processed rls iocb (currently always return 0)
8729  **/
8730 static int
8731 lpfc_els_rcv_rls(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
8732                  struct lpfc_nodelist *ndlp)
8733 {
8734         struct lpfc_hba *phba = vport->phba;
8735         LPFC_MBOXQ_t *mbox;
8736         struct ls_rjt stat;
8737         u32 ctx = get_job_ulpcontext(phba, cmdiocb);
8738         u32 ox_id = get_job_rcvoxid(phba, cmdiocb);
8739
8740         if ((ndlp->nlp_state != NLP_STE_UNMAPPED_NODE) &&
8741             (ndlp->nlp_state != NLP_STE_MAPPED_NODE))
8742                 /* reject the unsolicited RLS request and done with it */
8743                 goto reject_out;
8744
8745         mbox = mempool_alloc(phba->mbox_mem_pool, GFP_ATOMIC);
8746         if (mbox) {
8747                 lpfc_read_lnk_stat(phba, mbox);
8748                 mbox->ctx_buf = (void *)((unsigned long)
8749                                          (ox_id << 16 | ctx));
8750                 mbox->ctx_ndlp = lpfc_nlp_get(ndlp);
8751                 if (!mbox->ctx_ndlp)
8752                         goto node_err;
8753                 mbox->vport = vport;
8754                 mbox->mbox_cmpl = lpfc_els_rsp_rls_acc;
8755                 if (lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT)
8756                         != MBX_NOT_FINISHED)
8757                         /* Mbox completion will send ELS Response */
8758                         return 0;
8759                 /* Decrement reference count used for the failed mbox
8760                  * command.
8761                  */
8762                 lpfc_nlp_put(ndlp);
8763 node_err:
8764                 mempool_free(mbox, phba->mbox_mem_pool);
8765         }
8766 reject_out:
8767         /* issue rejection response */
8768         stat.un.b.lsRjtRsvd0 = 0;
8769         stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
8770         stat.un.b.lsRjtRsnCodeExp = LSEXP_CANT_GIVE_DATA;
8771         stat.un.b.vendorUnique = 0;
8772         lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
8773         return 0;
8774 }
8775
8776 /**
8777  * lpfc_els_rcv_rtv - Process an unsolicited rtv iocb
8778  * @vport: pointer to a host virtual N_Port data structure.
8779  * @cmdiocb: pointer to lpfc command iocb data structure.
8780  * @ndlp: pointer to a node-list data structure.
8781  *
8782  * This routine processes Read Timout Value (RTV) IOCB received as an
8783  * ELS unsolicited event. It first checks the remote port state. If the
8784  * remote port is not in NLP_STE_UNMAPPED_NODE state or NLP_STE_MAPPED_NODE
8785  * state, it invokes the lpfc_els_rsl_reject() routine to send the reject
8786  * response. Otherwise, it sends the Accept(ACC) response to a Read Timeout
8787  * Value (RTV) unsolicited IOCB event.
8788  *
8789  * Note that the ndlp reference count will be incremented by 1 for holding the
8790  * ndlp and the reference to ndlp will be stored into the ndlp field of
8791  * the IOCB for the completion callback function to the RTV Accept Response
8792  * ELS IOCB command.
8793  *
8794  * Return codes
8795  *   0 - Successfully processed rtv iocb (currently always return 0)
8796  **/
8797 static int
8798 lpfc_els_rcv_rtv(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
8799                  struct lpfc_nodelist *ndlp)
8800 {
8801         int rc = 0;
8802         IOCB_t *icmd;
8803         union lpfc_wqe128 *wqe;
8804         struct lpfc_hba *phba = vport->phba;
8805         struct ls_rjt stat;
8806         struct RTV_RSP *rtv_rsp;
8807         uint8_t *pcmd;
8808         struct lpfc_iocbq *elsiocb;
8809         uint32_t cmdsize;
8810         u32 ulp_context;
8811
8812         if ((ndlp->nlp_state != NLP_STE_UNMAPPED_NODE) &&
8813             (ndlp->nlp_state != NLP_STE_MAPPED_NODE))
8814                 /* reject the unsolicited RTV request and done with it */
8815                 goto reject_out;
8816
8817         cmdsize = sizeof(struct RTV_RSP) + sizeof(uint32_t);
8818         elsiocb = lpfc_prep_els_iocb(phba->pport, 0, cmdsize,
8819                                      lpfc_max_els_tries, ndlp,
8820                                      ndlp->nlp_DID, ELS_CMD_ACC);
8821
8822         if (!elsiocb)
8823                 return 1;
8824
8825         pcmd = (uint8_t *)elsiocb->cmd_dmabuf->virt;
8826         *((uint32_t *) (pcmd)) = ELS_CMD_ACC;
8827         pcmd += sizeof(uint32_t); /* Skip past command */
8828
8829         ulp_context = get_job_ulpcontext(phba, elsiocb);
8830         /* use the command's xri in the response */
8831         if (phba->sli_rev == LPFC_SLI_REV4) {
8832                 wqe = &elsiocb->wqe;
8833                 bf_set(wqe_ctxt_tag, &wqe->generic.wqe_com,
8834                        get_job_ulpcontext(phba, cmdiocb));
8835                 bf_set(wqe_rcvoxid, &wqe->xmit_els_rsp.wqe_com,
8836                        get_job_rcvoxid(phba, cmdiocb));
8837         } else {
8838                 icmd = &elsiocb->iocb;
8839                 icmd->ulpContext = get_job_ulpcontext(phba, cmdiocb);
8840                 icmd->unsli3.rcvsli3.ox_id = get_job_rcvoxid(phba, cmdiocb);
8841         }
8842
8843         rtv_rsp = (struct RTV_RSP *)pcmd;
8844
8845         /* populate RTV payload */
8846         rtv_rsp->ratov = cpu_to_be32(phba->fc_ratov * 1000); /* report msecs */
8847         rtv_rsp->edtov = cpu_to_be32(phba->fc_edtov);
8848         bf_set(qtov_edtovres, rtv_rsp, phba->fc_edtovResol ? 1 : 0);
8849         bf_set(qtov_rttov, rtv_rsp, 0); /* Field is for FC ONLY */
8850         rtv_rsp->qtov = cpu_to_be32(rtv_rsp->qtov);
8851
8852         /* Xmit ELS RLS ACC response tag <ulpIoTag> */
8853         lpfc_printf_vlog(ndlp->vport, KERN_INFO, LOG_ELS,
8854                          "2875 Xmit ELS RTV ACC response tag x%x xri x%x, "
8855                          "did x%x, nlp_flag x%x, nlp_state x%x, rpi x%x, "
8856                          "Data: x%x x%x x%x\n",
8857                          elsiocb->iotag, ulp_context,
8858                          ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
8859                          ndlp->nlp_rpi,
8860                         rtv_rsp->ratov, rtv_rsp->edtov, rtv_rsp->qtov);
8861         elsiocb->cmd_cmpl = lpfc_cmpl_els_rsp;
8862         phba->fc_stat.elsXmitACC++;
8863         elsiocb->ndlp = lpfc_nlp_get(ndlp);
8864         if (!elsiocb->ndlp) {
8865                 lpfc_els_free_iocb(phba, elsiocb);
8866                 return 0;
8867         }
8868
8869         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
8870         if (rc == IOCB_ERROR) {
8871                 lpfc_els_free_iocb(phba, elsiocb);
8872                 lpfc_nlp_put(ndlp);
8873         }
8874         return 0;
8875
8876 reject_out:
8877         /* issue rejection response */
8878         stat.un.b.lsRjtRsvd0 = 0;
8879         stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
8880         stat.un.b.lsRjtRsnCodeExp = LSEXP_CANT_GIVE_DATA;
8881         stat.un.b.vendorUnique = 0;
8882         lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
8883         return 0;
8884 }
8885
8886 /* lpfc_issue_els_rrq - Process an unsolicited rrq iocb
8887  * @vport: pointer to a host virtual N_Port data structure.
8888  * @ndlp: pointer to a node-list data structure.
8889  * @did: DID of the target.
8890  * @rrq: Pointer to the rrq struct.
8891  *
8892  * Build a ELS RRQ command and send it to the target. If the issue_iocb is
8893  * successful, the completion handler will clear the RRQ.
8894  *
8895  * Return codes
8896  *   0 - Successfully sent rrq els iocb.
8897  *   1 - Failed to send rrq els iocb.
8898  **/
8899 static int
8900 lpfc_issue_els_rrq(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
8901                         uint32_t did, struct lpfc_node_rrq *rrq)
8902 {
8903         struct lpfc_hba  *phba = vport->phba;
8904         struct RRQ *els_rrq;
8905         struct lpfc_iocbq *elsiocb;
8906         uint8_t *pcmd;
8907         uint16_t cmdsize;
8908         int ret;
8909
8910         if (!ndlp)
8911                 return 1;
8912
8913         /* If ndlp is not NULL, we will bump the reference count on it */
8914         cmdsize = (sizeof(uint32_t) + sizeof(struct RRQ));
8915         elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, 0, ndlp, did,
8916                                      ELS_CMD_RRQ);
8917         if (!elsiocb)
8918                 return 1;
8919
8920         pcmd = (uint8_t *)elsiocb->cmd_dmabuf->virt;
8921
8922         /* For RRQ request, remainder of payload is Exchange IDs */
8923         *((uint32_t *) (pcmd)) = ELS_CMD_RRQ;
8924         pcmd += sizeof(uint32_t);
8925         els_rrq = (struct RRQ *) pcmd;
8926
8927         bf_set(rrq_oxid, els_rrq, phba->sli4_hba.xri_ids[rrq->xritag]);
8928         bf_set(rrq_rxid, els_rrq, rrq->rxid);
8929         bf_set(rrq_did, els_rrq, vport->fc_myDID);
8930         els_rrq->rrq = cpu_to_be32(els_rrq->rrq);
8931         els_rrq->rrq_exchg = cpu_to_be32(els_rrq->rrq_exchg);
8932
8933
8934         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
8935                 "Issue RRQ:     did:x%x",
8936                 did, rrq->xritag, rrq->rxid);
8937         elsiocb->context_un.rrq = rrq;
8938         elsiocb->cmd_cmpl = lpfc_cmpl_els_rrq;
8939
8940         elsiocb->ndlp = lpfc_nlp_get(ndlp);
8941         if (!elsiocb->ndlp)
8942                 goto io_err;
8943
8944         ret = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
8945         if (ret == IOCB_ERROR) {
8946                 lpfc_nlp_put(ndlp);
8947                 goto io_err;
8948         }
8949         return 0;
8950
8951  io_err:
8952         lpfc_els_free_iocb(phba, elsiocb);
8953         return 1;
8954 }
8955
8956 /**
8957  * lpfc_send_rrq - Sends ELS RRQ if needed.
8958  * @phba: pointer to lpfc hba data structure.
8959  * @rrq: pointer to the active rrq.
8960  *
8961  * This routine will call the lpfc_issue_els_rrq if the rrq is
8962  * still active for the xri. If this function returns a failure then
8963  * the caller needs to clean up the RRQ by calling lpfc_clr_active_rrq.
8964  *
8965  * Returns 0 Success.
8966  *         1 Failure.
8967  **/
8968 int
8969 lpfc_send_rrq(struct lpfc_hba *phba, struct lpfc_node_rrq *rrq)
8970 {
8971         struct lpfc_nodelist *ndlp = lpfc_findnode_did(rrq->vport,
8972                                                        rrq->nlp_DID);
8973         if (!ndlp)
8974                 return 1;
8975
8976         if (lpfc_test_rrq_active(phba, ndlp, rrq->xritag))
8977                 return lpfc_issue_els_rrq(rrq->vport, ndlp,
8978                                          rrq->nlp_DID, rrq);
8979         else
8980                 return 1;
8981 }
8982
8983 /**
8984  * lpfc_els_rsp_rpl_acc - Issue an accept rpl els command
8985  * @vport: pointer to a host virtual N_Port data structure.
8986  * @cmdsize: size of the ELS command.
8987  * @oldiocb: pointer to the original lpfc command iocb data structure.
8988  * @ndlp: pointer to a node-list data structure.
8989  *
8990  * This routine issuees an Accept (ACC) Read Port List (RPL) ELS command.
8991  * It is to be called by the lpfc_els_rcv_rpl() routine to accept the RPL.
8992  *
8993  * Note that the ndlp reference count will be incremented by 1 for holding the
8994  * ndlp and the reference to ndlp will be stored into the ndlp field of
8995  * the IOCB for the completion callback function to the RPL Accept Response
8996  * ELS command.
8997  *
8998  * Return code
8999  *   0 - Successfully issued ACC RPL ELS command
9000  *   1 - Failed to issue ACC RPL ELS command
9001  **/
9002 static int
9003 lpfc_els_rsp_rpl_acc(struct lpfc_vport *vport, uint16_t cmdsize,
9004                      struct lpfc_iocbq *oldiocb, struct lpfc_nodelist *ndlp)
9005 {
9006         int rc = 0;
9007         struct lpfc_hba *phba = vport->phba;
9008         IOCB_t *icmd;
9009         union lpfc_wqe128 *wqe;
9010         RPL_RSP rpl_rsp;
9011         struct lpfc_iocbq *elsiocb;
9012         uint8_t *pcmd;
9013         u32 ulp_context;
9014
9015         elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, oldiocb->retry, ndlp,
9016                                      ndlp->nlp_DID, ELS_CMD_ACC);
9017
9018         if (!elsiocb)
9019                 return 1;
9020
9021         ulp_context = get_job_ulpcontext(phba, elsiocb);
9022         if (phba->sli_rev == LPFC_SLI_REV4) {
9023                 wqe = &elsiocb->wqe;
9024                 /* Xri / rx_id */
9025                 bf_set(wqe_ctxt_tag, &wqe->generic.wqe_com,
9026                        get_job_ulpcontext(phba, oldiocb));
9027                 bf_set(wqe_rcvoxid, &wqe->xmit_els_rsp.wqe_com,
9028                        get_job_rcvoxid(phba, oldiocb));
9029         } else {
9030                 icmd = &elsiocb->iocb;
9031                 icmd->ulpContext = get_job_ulpcontext(phba, oldiocb);
9032                 icmd->unsli3.rcvsli3.ox_id = get_job_rcvoxid(phba, oldiocb);
9033         }
9034
9035         pcmd = elsiocb->cmd_dmabuf->virt;
9036         *((uint32_t *) (pcmd)) = ELS_CMD_ACC;
9037         pcmd += sizeof(uint16_t);
9038         *((uint16_t *)(pcmd)) = be16_to_cpu(cmdsize);
9039         pcmd += sizeof(uint16_t);
9040
9041         /* Setup the RPL ACC payload */
9042         rpl_rsp.listLen = be32_to_cpu(1);
9043         rpl_rsp.index = 0;
9044         rpl_rsp.port_num_blk.portNum = 0;
9045         rpl_rsp.port_num_blk.portID = be32_to_cpu(vport->fc_myDID);
9046         memcpy(&rpl_rsp.port_num_blk.portName, &vport->fc_portname,
9047             sizeof(struct lpfc_name));
9048         memcpy(pcmd, &rpl_rsp, cmdsize - sizeof(uint32_t));
9049         /* Xmit ELS RPL ACC response tag <ulpIoTag> */
9050         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
9051                          "0120 Xmit ELS RPL ACC response tag x%x "
9052                          "xri x%x, did x%x, nlp_flag x%x, nlp_state x%x, "
9053                          "rpi x%x\n",
9054                          elsiocb->iotag, ulp_context,
9055                          ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
9056                          ndlp->nlp_rpi);
9057         elsiocb->cmd_cmpl = lpfc_cmpl_els_rsp;
9058         phba->fc_stat.elsXmitACC++;
9059         elsiocb->ndlp = lpfc_nlp_get(ndlp);
9060         if (!elsiocb->ndlp) {
9061                 lpfc_els_free_iocb(phba, elsiocb);
9062                 return 1;
9063         }
9064
9065         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
9066         if (rc == IOCB_ERROR) {
9067                 lpfc_els_free_iocb(phba, elsiocb);
9068                 lpfc_nlp_put(ndlp);
9069                 return 1;
9070         }
9071
9072         return 0;
9073 }
9074
9075 /**
9076  * lpfc_els_rcv_rpl - Process an unsolicited rpl iocb
9077  * @vport: pointer to a host virtual N_Port data structure.
9078  * @cmdiocb: pointer to lpfc command iocb data structure.
9079  * @ndlp: pointer to a node-list data structure.
9080  *
9081  * This routine processes Read Port List (RPL) IOCB received as an ELS
9082  * unsolicited event. It first checks the remote port state. If the remote
9083  * port is not in NLP_STE_UNMAPPED_NODE and NLP_STE_MAPPED_NODE states, it
9084  * invokes the lpfc_els_rsp_reject() routine to send reject response.
9085  * Otherwise, this routine then invokes the lpfc_els_rsp_rpl_acc() routine
9086  * to accept the RPL.
9087  *
9088  * Return code
9089  *   0 - Successfully processed rpl iocb (currently always return 0)
9090  **/
9091 static int
9092 lpfc_els_rcv_rpl(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
9093                  struct lpfc_nodelist *ndlp)
9094 {
9095         struct lpfc_dmabuf *pcmd;
9096         uint32_t *lp;
9097         uint32_t maxsize;
9098         uint16_t cmdsize;
9099         RPL *rpl;
9100         struct ls_rjt stat;
9101
9102         if ((ndlp->nlp_state != NLP_STE_UNMAPPED_NODE) &&
9103             (ndlp->nlp_state != NLP_STE_MAPPED_NODE)) {
9104                 /* issue rejection response */
9105                 stat.un.b.lsRjtRsvd0 = 0;
9106                 stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
9107                 stat.un.b.lsRjtRsnCodeExp = LSEXP_CANT_GIVE_DATA;
9108                 stat.un.b.vendorUnique = 0;
9109                 lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp,
9110                         NULL);
9111                 /* rejected the unsolicited RPL request and done with it */
9112                 return 0;
9113         }
9114
9115         pcmd = cmdiocb->cmd_dmabuf;
9116         lp = (uint32_t *) pcmd->virt;
9117         rpl = (RPL *) (lp + 1);
9118         maxsize = be32_to_cpu(rpl->maxsize);
9119
9120         /* We support only one port */
9121         if ((rpl->index == 0) &&
9122             ((maxsize == 0) ||
9123              ((maxsize * sizeof(uint32_t)) >= sizeof(RPL_RSP)))) {
9124                 cmdsize = sizeof(uint32_t) + sizeof(RPL_RSP);
9125         } else {
9126                 cmdsize = sizeof(uint32_t) + maxsize * sizeof(uint32_t);
9127         }
9128         lpfc_els_rsp_rpl_acc(vport, cmdsize, cmdiocb, ndlp);
9129
9130         return 0;
9131 }
9132
9133 /**
9134  * lpfc_els_rcv_farp - Process an unsolicited farp request els command
9135  * @vport: pointer to a virtual N_Port data structure.
9136  * @cmdiocb: pointer to lpfc command iocb data structure.
9137  * @ndlp: pointer to a node-list data structure.
9138  *
9139  * This routine processes Fibre Channel Address Resolution Protocol
9140  * (FARP) Request IOCB received as an ELS unsolicited event. Currently,
9141  * the lpfc driver only supports matching on WWPN or WWNN for FARP. As such,
9142  * FARP_MATCH_PORT flag and FARP_MATCH_NODE flag are checked against the
9143  * Match Flag in the FARP request IOCB: if FARP_MATCH_PORT flag is set, the
9144  * remote PortName is compared against the FC PortName stored in the @vport
9145  * data structure; if FARP_MATCH_NODE flag is set, the remote NodeName is
9146  * compared against the FC NodeName stored in the @vport data structure.
9147  * If any of these matches and the FARP_REQUEST_FARPR flag is set in the
9148  * FARP request IOCB Response Flag, the lpfc_issue_els_farpr() routine is
9149  * invoked to send out FARP Response to the remote node. Before sending the
9150  * FARP Response, however, the FARP_REQUEST_PLOGI flag is check in the FARP
9151  * request IOCB Response Flag and, if it is set, the lpfc_issue_els_plogi()
9152  * routine is invoked to log into the remote port first.
9153  *
9154  * Return code
9155  *   0 - Either the FARP Match Mode not supported or successfully processed
9156  **/
9157 static int
9158 lpfc_els_rcv_farp(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
9159                   struct lpfc_nodelist *ndlp)
9160 {
9161         struct lpfc_dmabuf *pcmd;
9162         uint32_t *lp;
9163         FARP *fp;
9164         uint32_t cnt, did;
9165
9166         did = get_job_els_rsp64_did(vport->phba, cmdiocb);
9167         pcmd = cmdiocb->cmd_dmabuf;
9168         lp = (uint32_t *) pcmd->virt;
9169
9170         lp++;
9171         fp = (FARP *) lp;
9172         /* FARP-REQ received from DID <did> */
9173         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
9174                          "0601 FARP-REQ received from DID x%x\n", did);
9175         /* We will only support match on WWPN or WWNN */
9176         if (fp->Mflags & ~(FARP_MATCH_NODE | FARP_MATCH_PORT)) {
9177                 return 0;
9178         }
9179
9180         cnt = 0;
9181         /* If this FARP command is searching for my portname */
9182         if (fp->Mflags & FARP_MATCH_PORT) {
9183                 if (memcmp(&fp->RportName, &vport->fc_portname,
9184                            sizeof(struct lpfc_name)) == 0)
9185                         cnt = 1;
9186         }
9187
9188         /* If this FARP command is searching for my nodename */
9189         if (fp->Mflags & FARP_MATCH_NODE) {
9190                 if (memcmp(&fp->RnodeName, &vport->fc_nodename,
9191                            sizeof(struct lpfc_name)) == 0)
9192                         cnt = 1;
9193         }
9194
9195         if (cnt) {
9196                 if ((ndlp->nlp_state == NLP_STE_UNMAPPED_NODE) ||
9197                    (ndlp->nlp_state == NLP_STE_MAPPED_NODE)) {
9198                         /* Log back into the node before sending the FARP. */
9199                         if (fp->Rflags & FARP_REQUEST_PLOGI) {
9200                                 ndlp->nlp_prev_state = ndlp->nlp_state;
9201                                 lpfc_nlp_set_state(vport, ndlp,
9202                                                    NLP_STE_PLOGI_ISSUE);
9203                                 lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0);
9204                         }
9205
9206                         /* Send a FARP response to that node */
9207                         if (fp->Rflags & FARP_REQUEST_FARPR)
9208                                 lpfc_issue_els_farpr(vport, did, 0);
9209                 }
9210         }
9211         return 0;
9212 }
9213
9214 /**
9215  * lpfc_els_rcv_farpr - Process an unsolicited farp response iocb
9216  * @vport: pointer to a host virtual N_Port data structure.
9217  * @cmdiocb: pointer to lpfc command iocb data structure.
9218  * @ndlp: pointer to a node-list data structure.
9219  *
9220  * This routine processes Fibre Channel Address Resolution Protocol
9221  * Response (FARPR) IOCB received as an ELS unsolicited event. It simply
9222  * invokes the lpfc_els_rsp_acc() routine to the remote node to accept
9223  * the FARP response request.
9224  *
9225  * Return code
9226  *   0 - Successfully processed FARPR IOCB (currently always return 0)
9227  **/
9228 static int
9229 lpfc_els_rcv_farpr(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
9230                    struct lpfc_nodelist  *ndlp)
9231 {
9232         uint32_t did;
9233
9234         did = get_job_els_rsp64_did(vport->phba, cmdiocb);
9235
9236         /* FARP-RSP received from DID <did> */
9237         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
9238                          "0600 FARP-RSP received from DID x%x\n", did);
9239         /* ACCEPT the Farp resp request */
9240         lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
9241
9242         return 0;
9243 }
9244
9245 /**
9246  * lpfc_els_rcv_fan - Process an unsolicited fan iocb command
9247  * @vport: pointer to a host virtual N_Port data structure.
9248  * @cmdiocb: pointer to lpfc command iocb data structure.
9249  * @fan_ndlp: pointer to a node-list data structure.
9250  *
9251  * This routine processes a Fabric Address Notification (FAN) IOCB
9252  * command received as an ELS unsolicited event. The FAN ELS command will
9253  * only be processed on a physical port (i.e., the @vport represents the
9254  * physical port). The fabric NodeName and PortName from the FAN IOCB are
9255  * compared against those in the phba data structure. If any of those is
9256  * different, the lpfc_initial_flogi() routine is invoked to initialize
9257  * Fabric Login (FLOGI) to the fabric to start the discover over. Otherwise,
9258  * if both of those are identical, the lpfc_issue_fabric_reglogin() routine
9259  * is invoked to register login to the fabric.
9260  *
9261  * Return code
9262  *   0 - Successfully processed fan iocb (currently always return 0).
9263  **/
9264 static int
9265 lpfc_els_rcv_fan(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
9266                  struct lpfc_nodelist *fan_ndlp)
9267 {
9268         struct lpfc_hba *phba = vport->phba;
9269         uint32_t *lp;
9270         FAN *fp;
9271
9272         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS, "0265 FAN received\n");
9273         lp = (uint32_t *)cmdiocb->cmd_dmabuf->virt;
9274         fp = (FAN *) ++lp;
9275         /* FAN received; Fan does not have a reply sequence */
9276         if ((vport == phba->pport) &&
9277             (vport->port_state == LPFC_LOCAL_CFG_LINK)) {
9278                 if ((memcmp(&phba->fc_fabparam.nodeName, &fp->FnodeName,
9279                             sizeof(struct lpfc_name))) ||
9280                     (memcmp(&phba->fc_fabparam.portName, &fp->FportName,
9281                             sizeof(struct lpfc_name)))) {
9282                         /* This port has switched fabrics. FLOGI is required */
9283                         lpfc_issue_init_vfi(vport);
9284                 } else {
9285                         /* FAN verified - skip FLOGI */
9286                         vport->fc_myDID = vport->fc_prevDID;
9287                         if (phba->sli_rev < LPFC_SLI_REV4)
9288                                 lpfc_issue_fabric_reglogin(vport);
9289                         else {
9290                                 lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
9291                                         "3138 Need register VFI: (x%x/%x)\n",
9292                                         vport->fc_prevDID, vport->fc_myDID);
9293                                 lpfc_issue_reg_vfi(vport);
9294                         }
9295                 }
9296         }
9297         return 0;
9298 }
9299
9300 /**
9301  * lpfc_els_rcv_edc - Process an unsolicited EDC iocb
9302  * @vport: pointer to a host virtual N_Port data structure.
9303  * @cmdiocb: pointer to lpfc command iocb data structure.
9304  * @ndlp: pointer to a node-list data structure.
9305  *
9306  * Return code
9307  *   0 - Successfully processed echo iocb (currently always return 0)
9308  **/
9309 static int
9310 lpfc_els_rcv_edc(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
9311                  struct lpfc_nodelist *ndlp)
9312 {
9313         struct lpfc_hba  *phba = vport->phba;
9314         struct fc_els_edc *edc_req;
9315         struct fc_tlv_desc *tlv;
9316         uint8_t *payload;
9317         uint32_t *ptr, dtag;
9318         const char *dtag_nm;
9319         int desc_cnt = 0, bytes_remain;
9320         struct fc_diag_lnkflt_desc *plnkflt;
9321
9322         payload = cmdiocb->cmd_dmabuf->virt;
9323
9324         edc_req = (struct fc_els_edc *)payload;
9325         bytes_remain = be32_to_cpu(edc_req->desc_len);
9326
9327         ptr = (uint32_t *)payload;
9328         lpfc_printf_vlog(vport, KERN_INFO,
9329                          LOG_ELS | LOG_CGN_MGMT | LOG_LDS_EVENT,
9330                          "3319 Rcv EDC payload len %d: x%x x%x x%x\n",
9331                          bytes_remain, be32_to_cpu(*ptr),
9332                          be32_to_cpu(*(ptr + 1)), be32_to_cpu(*(ptr + 2)));
9333
9334         /* No signal support unless there is a congestion descriptor */
9335         phba->cgn_reg_signal = EDC_CG_SIG_NOTSUPPORTED;
9336         phba->cgn_sig_freq = 0;
9337         phba->cgn_reg_fpin = LPFC_CGN_FPIN_ALARM | LPFC_CGN_FPIN_WARN;
9338
9339         if (bytes_remain <= 0)
9340                 goto out;
9341
9342         tlv = edc_req->desc;
9343
9344         /*
9345          * cycle through EDC diagnostic descriptors to find the
9346          * congestion signaling capability descriptor
9347          */
9348         while (bytes_remain) {
9349                 if (bytes_remain < FC_TLV_DESC_HDR_SZ) {
9350                         lpfc_printf_log(phba, KERN_WARNING,
9351                                         LOG_ELS | LOG_CGN_MGMT | LOG_LDS_EVENT,
9352                                         "6464 Truncated TLV hdr on "
9353                                         "Diagnostic descriptor[%d]\n",
9354                                         desc_cnt);
9355                         goto out;
9356                 }
9357
9358                 dtag = be32_to_cpu(tlv->desc_tag);
9359                 switch (dtag) {
9360                 case ELS_DTAG_LNK_FAULT_CAP:
9361                         if (bytes_remain < FC_TLV_DESC_SZ_FROM_LENGTH(tlv) ||
9362                             FC_TLV_DESC_SZ_FROM_LENGTH(tlv) !=
9363                                 sizeof(struct fc_diag_lnkflt_desc)) {
9364                                 lpfc_printf_log(phba, KERN_WARNING,
9365                                         LOG_ELS | LOG_CGN_MGMT | LOG_LDS_EVENT,
9366                                         "6465 Truncated Link Fault Diagnostic "
9367                                         "descriptor[%d]: %d vs 0x%zx 0x%zx\n",
9368                                         desc_cnt, bytes_remain,
9369                                         FC_TLV_DESC_SZ_FROM_LENGTH(tlv),
9370                                         sizeof(struct fc_diag_lnkflt_desc));
9371                                 goto out;
9372                         }
9373                         plnkflt = (struct fc_diag_lnkflt_desc *)tlv;
9374                         lpfc_printf_log(phba, KERN_INFO,
9375                                 LOG_ELS | LOG_LDS_EVENT,
9376                                 "4626 Link Fault Desc Data: x%08x len x%x "
9377                                 "da x%x dd x%x interval x%x\n",
9378                                 be32_to_cpu(plnkflt->desc_tag),
9379                                 be32_to_cpu(plnkflt->desc_len),
9380                                 be32_to_cpu(
9381                                         plnkflt->degrade_activate_threshold),
9382                                 be32_to_cpu(
9383                                         plnkflt->degrade_deactivate_threshold),
9384                                 be32_to_cpu(plnkflt->fec_degrade_interval));
9385                         break;
9386                 case ELS_DTAG_CG_SIGNAL_CAP:
9387                         if (bytes_remain < FC_TLV_DESC_SZ_FROM_LENGTH(tlv) ||
9388                             FC_TLV_DESC_SZ_FROM_LENGTH(tlv) !=
9389                                 sizeof(struct fc_diag_cg_sig_desc)) {
9390                                 lpfc_printf_log(
9391                                         phba, KERN_WARNING, LOG_CGN_MGMT,
9392                                         "6466 Truncated cgn signal Diagnostic "
9393                                         "descriptor[%d]: %d vs 0x%zx 0x%zx\n",
9394                                         desc_cnt, bytes_remain,
9395                                         FC_TLV_DESC_SZ_FROM_LENGTH(tlv),
9396                                         sizeof(struct fc_diag_cg_sig_desc));
9397                                 goto out;
9398                         }
9399
9400                         phba->cgn_reg_fpin = phba->cgn_init_reg_fpin;
9401                         phba->cgn_reg_signal = phba->cgn_init_reg_signal;
9402
9403                         /* We start negotiation with lpfc_fabric_cgn_frequency.
9404                          * When we process the EDC, we will settle on the
9405                          * higher frequency.
9406                          */
9407                         phba->cgn_sig_freq = lpfc_fabric_cgn_frequency;
9408
9409                         lpfc_least_capable_settings(
9410                                 phba, (struct fc_diag_cg_sig_desc *)tlv);
9411                         break;
9412                 default:
9413                         dtag_nm = lpfc_get_tlv_dtag_nm(dtag);
9414                         lpfc_printf_log(phba, KERN_WARNING,
9415                                         LOG_ELS | LOG_CGN_MGMT | LOG_LDS_EVENT,
9416                                         "6467 unknown Diagnostic "
9417                                         "Descriptor[%d]: tag x%x (%s)\n",
9418                                         desc_cnt, dtag, dtag_nm);
9419                 }
9420                 bytes_remain -= FC_TLV_DESC_SZ_FROM_LENGTH(tlv);
9421                 tlv = fc_tlv_next_desc(tlv);
9422                 desc_cnt++;
9423         }
9424 out:
9425         /* Need to send back an ACC */
9426         lpfc_issue_els_edc_rsp(vport, cmdiocb, ndlp);
9427
9428         lpfc_config_cgn_signal(phba);
9429         return 0;
9430 }
9431
9432 /**
9433  * lpfc_els_timeout - Handler funciton to the els timer
9434  * @t: timer context used to obtain the vport.
9435  *
9436  * This routine is invoked by the ELS timer after timeout. It posts the ELS
9437  * timer timeout event by setting the WORKER_ELS_TMO bit to the work port
9438  * event bitmap and then invokes the lpfc_worker_wake_up() routine to wake
9439  * up the worker thread. It is for the worker thread to invoke the routine
9440  * lpfc_els_timeout_handler() to work on the posted event WORKER_ELS_TMO.
9441  **/
9442 void
9443 lpfc_els_timeout(struct timer_list *t)
9444 {
9445         struct lpfc_vport *vport = from_timer(vport, t, els_tmofunc);
9446         struct lpfc_hba   *phba = vport->phba;
9447         uint32_t tmo_posted;
9448         unsigned long iflag;
9449
9450         spin_lock_irqsave(&vport->work_port_lock, iflag);
9451         tmo_posted = vport->work_port_events & WORKER_ELS_TMO;
9452         if ((!tmo_posted) && (!(vport->load_flag & FC_UNLOADING)))
9453                 vport->work_port_events |= WORKER_ELS_TMO;
9454         spin_unlock_irqrestore(&vport->work_port_lock, iflag);
9455
9456         if ((!tmo_posted) && (!(vport->load_flag & FC_UNLOADING)))
9457                 lpfc_worker_wake_up(phba);
9458         return;
9459 }
9460
9461
9462 /**
9463  * lpfc_els_timeout_handler - Process an els timeout event
9464  * @vport: pointer to a virtual N_Port data structure.
9465  *
9466  * This routine is the actual handler function that processes an ELS timeout
9467  * event. It walks the ELS ring to get and abort all the IOCBs (except the
9468  * ABORT/CLOSE/FARP/FARPR/FDISC), which are associated with the @vport by
9469  * invoking the lpfc_sli_issue_abort_iotag() routine.
9470  **/
9471 void
9472 lpfc_els_timeout_handler(struct lpfc_vport *vport)
9473 {
9474         struct lpfc_hba  *phba = vport->phba;
9475         struct lpfc_sli_ring *pring;
9476         struct lpfc_iocbq *tmp_iocb, *piocb;
9477         IOCB_t *cmd = NULL;
9478         struct lpfc_dmabuf *pcmd;
9479         uint32_t els_command = 0;
9480         uint32_t timeout;
9481         uint32_t remote_ID = 0xffffffff;
9482         LIST_HEAD(abort_list);
9483         u32 ulp_command = 0, ulp_context = 0, did = 0, iotag = 0;
9484
9485
9486         timeout = (uint32_t)(phba->fc_ratov << 1);
9487
9488         pring = lpfc_phba_elsring(phba);
9489         if (unlikely(!pring))
9490                 return;
9491
9492         if (phba->pport->load_flag & FC_UNLOADING)
9493                 return;
9494
9495         spin_lock_irq(&phba->hbalock);
9496         if (phba->sli_rev == LPFC_SLI_REV4)
9497                 spin_lock(&pring->ring_lock);
9498
9499         list_for_each_entry_safe(piocb, tmp_iocb, &pring->txcmplq, list) {
9500                 ulp_command = get_job_cmnd(phba, piocb);
9501                 ulp_context = get_job_ulpcontext(phba, piocb);
9502                 did = get_job_els_rsp64_did(phba, piocb);
9503
9504                 if (phba->sli_rev == LPFC_SLI_REV4) {
9505                         iotag = get_wqe_reqtag(piocb);
9506                 } else {
9507                         cmd = &piocb->iocb;
9508                         iotag = cmd->ulpIoTag;
9509                 }
9510
9511                 if ((piocb->cmd_flag & LPFC_IO_LIBDFC) != 0 ||
9512                     ulp_command == CMD_ABORT_XRI_CX ||
9513                     ulp_command == CMD_ABORT_XRI_CN ||
9514                     ulp_command == CMD_CLOSE_XRI_CN)
9515                         continue;
9516
9517                 if (piocb->vport != vport)
9518                         continue;
9519
9520                 pcmd = piocb->cmd_dmabuf;
9521                 if (pcmd)
9522                         els_command = *(uint32_t *) (pcmd->virt);
9523
9524                 if (els_command == ELS_CMD_FARP ||
9525                     els_command == ELS_CMD_FARPR ||
9526                     els_command == ELS_CMD_FDISC)
9527                         continue;
9528
9529                 if (piocb->drvrTimeout > 0) {
9530                         if (piocb->drvrTimeout >= timeout)
9531                                 piocb->drvrTimeout -= timeout;
9532                         else
9533                                 piocb->drvrTimeout = 0;
9534                         continue;
9535                 }
9536
9537                 remote_ID = 0xffffffff;
9538                 if (ulp_command != CMD_GEN_REQUEST64_CR) {
9539                         remote_ID = did;
9540                 } else {
9541                         struct lpfc_nodelist *ndlp;
9542                         ndlp = __lpfc_findnode_rpi(vport, ulp_context);
9543                         if (ndlp)
9544                                 remote_ID = ndlp->nlp_DID;
9545                 }
9546                 list_add_tail(&piocb->dlist, &abort_list);
9547         }
9548         if (phba->sli_rev == LPFC_SLI_REV4)
9549                 spin_unlock(&pring->ring_lock);
9550         spin_unlock_irq(&phba->hbalock);
9551
9552         list_for_each_entry_safe(piocb, tmp_iocb, &abort_list, dlist) {
9553                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
9554                          "0127 ELS timeout Data: x%x x%x x%x "
9555                          "x%x\n", els_command,
9556                          remote_ID, ulp_command, iotag);
9557
9558                 spin_lock_irq(&phba->hbalock);
9559                 list_del_init(&piocb->dlist);
9560                 lpfc_sli_issue_abort_iotag(phba, pring, piocb, NULL);
9561                 spin_unlock_irq(&phba->hbalock);
9562         }
9563
9564         /* Make sure HBA is alive */
9565         lpfc_issue_hb_tmo(phba);
9566
9567         if (!list_empty(&pring->txcmplq))
9568                 if (!(phba->pport->load_flag & FC_UNLOADING))
9569                         mod_timer(&vport->els_tmofunc,
9570                                   jiffies + msecs_to_jiffies(1000 * timeout));
9571 }
9572
9573 /**
9574  * lpfc_els_flush_cmd - Clean up the outstanding els commands to a vport
9575  * @vport: pointer to a host virtual N_Port data structure.
9576  *
9577  * This routine is used to clean up all the outstanding ELS commands on a
9578  * @vport. It first aborts the @vport by invoking lpfc_fabric_abort_vport()
9579  * routine. After that, it walks the ELS transmit queue to remove all the
9580  * IOCBs with the @vport other than the QUE_RING and ABORT/CLOSE IOCBs. For
9581  * the IOCBs with a non-NULL completion callback function, the callback
9582  * function will be invoked with the status set to IOSTAT_LOCAL_REJECT and
9583  * un.ulpWord[4] set to IOERR_SLI_ABORTED. For IOCBs with a NULL completion
9584  * callback function, the IOCB will simply be released. Finally, it walks
9585  * the ELS transmit completion queue to issue an abort IOCB to any transmit
9586  * completion queue IOCB that is associated with the @vport and is not
9587  * an IOCB from libdfc (i.e., the management plane IOCBs that are not
9588  * part of the discovery state machine) out to HBA by invoking the
9589  * lpfc_sli_issue_abort_iotag() routine. Note that this function issues the
9590  * abort IOCB to any transmit completion queueed IOCB, it does not guarantee
9591  * the IOCBs are aborted when this function returns.
9592  **/
9593 void
9594 lpfc_els_flush_cmd(struct lpfc_vport *vport)
9595 {
9596         LIST_HEAD(abort_list);
9597         struct lpfc_hba  *phba = vport->phba;
9598         struct lpfc_sli_ring *pring;
9599         struct lpfc_iocbq *tmp_iocb, *piocb;
9600         u32 ulp_command;
9601         unsigned long iflags = 0;
9602
9603         lpfc_fabric_abort_vport(vport);
9604
9605         /*
9606          * For SLI3, only the hbalock is required.  But SLI4 needs to coordinate
9607          * with the ring insert operation.  Because lpfc_sli_issue_abort_iotag
9608          * ultimately grabs the ring_lock, the driver must splice the list into
9609          * a working list and release the locks before calling the abort.
9610          */
9611         spin_lock_irqsave(&phba->hbalock, iflags);
9612         pring = lpfc_phba_elsring(phba);
9613
9614         /* Bail out if we've no ELS wq, like in PCI error recovery case. */
9615         if (unlikely(!pring)) {
9616                 spin_unlock_irqrestore(&phba->hbalock, iflags);
9617                 return;
9618         }
9619
9620         if (phba->sli_rev == LPFC_SLI_REV4)
9621                 spin_lock(&pring->ring_lock);
9622
9623         /* First we need to issue aborts to outstanding cmds on txcmpl */
9624         list_for_each_entry_safe(piocb, tmp_iocb, &pring->txcmplq, list) {
9625                 if (piocb->cmd_flag & LPFC_IO_LIBDFC)
9626                         continue;
9627
9628                 if (piocb->vport != vport)
9629                         continue;
9630
9631                 if (piocb->cmd_flag & LPFC_DRIVER_ABORTED)
9632                         continue;
9633
9634                 /* On the ELS ring we can have ELS_REQUESTs or
9635                  * GEN_REQUESTs waiting for a response.
9636                  */
9637                 ulp_command = get_job_cmnd(phba, piocb);
9638                 if (ulp_command == CMD_ELS_REQUEST64_CR) {
9639                         list_add_tail(&piocb->dlist, &abort_list);
9640
9641                         /* If the link is down when flushing ELS commands
9642                          * the firmware will not complete them till after
9643                          * the link comes back up. This may confuse
9644                          * discovery for the new link up, so we need to
9645                          * change the compl routine to just clean up the iocb
9646                          * and avoid any retry logic.
9647                          */
9648                         if (phba->link_state == LPFC_LINK_DOWN)
9649                                 piocb->cmd_cmpl = lpfc_cmpl_els_link_down;
9650                 }
9651                 if (ulp_command == CMD_GEN_REQUEST64_CR)
9652                         list_add_tail(&piocb->dlist, &abort_list);
9653         }
9654
9655         if (phba->sli_rev == LPFC_SLI_REV4)
9656                 spin_unlock(&pring->ring_lock);
9657         spin_unlock_irqrestore(&phba->hbalock, iflags);
9658
9659         /* Abort each txcmpl iocb on aborted list and remove the dlist links. */
9660         list_for_each_entry_safe(piocb, tmp_iocb, &abort_list, dlist) {
9661                 spin_lock_irqsave(&phba->hbalock, iflags);
9662                 list_del_init(&piocb->dlist);
9663                 lpfc_sli_issue_abort_iotag(phba, pring, piocb, NULL);
9664                 spin_unlock_irqrestore(&phba->hbalock, iflags);
9665         }
9666         /* Make sure HBA is alive */
9667         lpfc_issue_hb_tmo(phba);
9668
9669         if (!list_empty(&abort_list))
9670                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
9671                                  "3387 abort list for txq not empty\n");
9672         INIT_LIST_HEAD(&abort_list);
9673
9674         spin_lock_irqsave(&phba->hbalock, iflags);
9675         if (phba->sli_rev == LPFC_SLI_REV4)
9676                 spin_lock(&pring->ring_lock);
9677
9678         /* No need to abort the txq list,
9679          * just queue them up for lpfc_sli_cancel_iocbs
9680          */
9681         list_for_each_entry_safe(piocb, tmp_iocb, &pring->txq, list) {
9682                 ulp_command = get_job_cmnd(phba, piocb);
9683
9684                 if (piocb->cmd_flag & LPFC_IO_LIBDFC)
9685                         continue;
9686
9687                 /* Do not flush out the QUE_RING and ABORT/CLOSE iocbs */
9688                 if (ulp_command == CMD_QUE_RING_BUF_CN ||
9689                     ulp_command == CMD_QUE_RING_BUF64_CN ||
9690                     ulp_command == CMD_CLOSE_XRI_CN ||
9691                     ulp_command == CMD_ABORT_XRI_CN ||
9692                     ulp_command == CMD_ABORT_XRI_CX)
9693                         continue;
9694
9695                 if (piocb->vport != vport)
9696                         continue;
9697
9698                 list_del_init(&piocb->list);
9699                 list_add_tail(&piocb->list, &abort_list);
9700         }
9701
9702         /* The same holds true for any FLOGI/FDISC on the fabric_iocb_list */
9703         if (vport == phba->pport) {
9704                 list_for_each_entry_safe(piocb, tmp_iocb,
9705                                          &phba->fabric_iocb_list, list) {
9706                         list_del_init(&piocb->list);
9707                         list_add_tail(&piocb->list, &abort_list);
9708                 }
9709         }
9710
9711         if (phba->sli_rev == LPFC_SLI_REV4)
9712                 spin_unlock(&pring->ring_lock);
9713         spin_unlock_irqrestore(&phba->hbalock, iflags);
9714
9715         /* Cancel all the IOCBs from the completions list */
9716         lpfc_sli_cancel_iocbs(phba, &abort_list,
9717                               IOSTAT_LOCAL_REJECT, IOERR_SLI_ABORTED);
9718
9719         return;
9720 }
9721
9722 /**
9723  * lpfc_els_flush_all_cmd - Clean up all the outstanding els commands to a HBA
9724  * @phba: pointer to lpfc hba data structure.
9725  *
9726  * This routine is used to clean up all the outstanding ELS commands on a
9727  * @phba. It first aborts the @phba by invoking the lpfc_fabric_abort_hba()
9728  * routine. After that, it walks the ELS transmit queue to remove all the
9729  * IOCBs to the @phba other than the QUE_RING and ABORT/CLOSE IOCBs. For
9730  * the IOCBs with the completion callback function associated, the callback
9731  * function will be invoked with the status set to IOSTAT_LOCAL_REJECT and
9732  * un.ulpWord[4] set to IOERR_SLI_ABORTED. For IOCBs without the completion
9733  * callback function associated, the IOCB will simply be released. Finally,
9734  * it walks the ELS transmit completion queue to issue an abort IOCB to any
9735  * transmit completion queue IOCB that is not an IOCB from libdfc (i.e., the
9736  * management plane IOCBs that are not part of the discovery state machine)
9737  * out to HBA by invoking the lpfc_sli_issue_abort_iotag() routine.
9738  **/
9739 void
9740 lpfc_els_flush_all_cmd(struct lpfc_hba  *phba)
9741 {
9742         struct lpfc_vport *vport;
9743
9744         spin_lock_irq(&phba->port_list_lock);
9745         list_for_each_entry(vport, &phba->port_list, listentry)
9746                 lpfc_els_flush_cmd(vport);
9747         spin_unlock_irq(&phba->port_list_lock);
9748
9749         return;
9750 }
9751
9752 /**
9753  * lpfc_send_els_failure_event - Posts an ELS command failure event
9754  * @phba: Pointer to hba context object.
9755  * @cmdiocbp: Pointer to command iocb which reported error.
9756  * @rspiocbp: Pointer to response iocb which reported error.
9757  *
9758  * This function sends an event when there is an ELS command
9759  * failure.
9760  **/
9761 void
9762 lpfc_send_els_failure_event(struct lpfc_hba *phba,
9763                         struct lpfc_iocbq *cmdiocbp,
9764                         struct lpfc_iocbq *rspiocbp)
9765 {
9766         struct lpfc_vport *vport = cmdiocbp->vport;
9767         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
9768         struct lpfc_lsrjt_event lsrjt_event;
9769         struct lpfc_fabric_event_header fabric_event;
9770         struct ls_rjt stat;
9771         struct lpfc_nodelist *ndlp;
9772         uint32_t *pcmd;
9773         u32 ulp_status, ulp_word4;
9774
9775         ndlp = cmdiocbp->ndlp;
9776         if (!ndlp)
9777                 return;
9778
9779         ulp_status = get_job_ulpstatus(phba, rspiocbp);
9780         ulp_word4 = get_job_word4(phba, rspiocbp);
9781
9782         if (ulp_status == IOSTAT_LS_RJT) {
9783                 lsrjt_event.header.event_type = FC_REG_ELS_EVENT;
9784                 lsrjt_event.header.subcategory = LPFC_EVENT_LSRJT_RCV;
9785                 memcpy(lsrjt_event.header.wwpn, &ndlp->nlp_portname,
9786                         sizeof(struct lpfc_name));
9787                 memcpy(lsrjt_event.header.wwnn, &ndlp->nlp_nodename,
9788                         sizeof(struct lpfc_name));
9789                 pcmd = (uint32_t *)cmdiocbp->cmd_dmabuf->virt;
9790                 lsrjt_event.command = (pcmd != NULL) ? *pcmd : 0;
9791                 stat.un.ls_rjt_error_be = cpu_to_be32(ulp_word4);
9792                 lsrjt_event.reason_code = stat.un.b.lsRjtRsnCode;
9793                 lsrjt_event.explanation = stat.un.b.lsRjtRsnCodeExp;
9794                 fc_host_post_vendor_event(shost,
9795                         fc_get_event_number(),
9796                         sizeof(lsrjt_event),
9797                         (char *)&lsrjt_event,
9798                         LPFC_NL_VENDOR_ID);
9799                 return;
9800         }
9801         if (ulp_status == IOSTAT_NPORT_BSY ||
9802             ulp_status == IOSTAT_FABRIC_BSY) {
9803                 fabric_event.event_type = FC_REG_FABRIC_EVENT;
9804                 if (ulp_status == IOSTAT_NPORT_BSY)
9805                         fabric_event.subcategory = LPFC_EVENT_PORT_BUSY;
9806                 else
9807                         fabric_event.subcategory = LPFC_EVENT_FABRIC_BUSY;
9808                 memcpy(fabric_event.wwpn, &ndlp->nlp_portname,
9809                         sizeof(struct lpfc_name));
9810                 memcpy(fabric_event.wwnn, &ndlp->nlp_nodename,
9811                         sizeof(struct lpfc_name));
9812                 fc_host_post_vendor_event(shost,
9813                         fc_get_event_number(),
9814                         sizeof(fabric_event),
9815                         (char *)&fabric_event,
9816                         LPFC_NL_VENDOR_ID);
9817                 return;
9818         }
9819
9820 }
9821
9822 /**
9823  * lpfc_send_els_event - Posts unsolicited els event
9824  * @vport: Pointer to vport object.
9825  * @ndlp: Pointer FC node object.
9826  * @payload: ELS command code type.
9827  *
9828  * This function posts an event when there is an incoming
9829  * unsolicited ELS command.
9830  **/
9831 static void
9832 lpfc_send_els_event(struct lpfc_vport *vport,
9833                     struct lpfc_nodelist *ndlp,
9834                     uint32_t *payload)
9835 {
9836         struct lpfc_els_event_header *els_data = NULL;
9837         struct lpfc_logo_event *logo_data = NULL;
9838         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
9839
9840         if (*payload == ELS_CMD_LOGO) {
9841                 logo_data = kmalloc(sizeof(struct lpfc_logo_event), GFP_KERNEL);
9842                 if (!logo_data) {
9843                         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
9844                                 "0148 Failed to allocate memory "
9845                                 "for LOGO event\n");
9846                         return;
9847                 }
9848                 els_data = &logo_data->header;
9849         } else {
9850                 els_data = kmalloc(sizeof(struct lpfc_els_event_header),
9851                         GFP_KERNEL);
9852                 if (!els_data) {
9853                         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
9854                                 "0149 Failed to allocate memory "
9855                                 "for ELS event\n");
9856                         return;
9857                 }
9858         }
9859         els_data->event_type = FC_REG_ELS_EVENT;
9860         switch (*payload) {
9861         case ELS_CMD_PLOGI:
9862                 els_data->subcategory = LPFC_EVENT_PLOGI_RCV;
9863                 break;
9864         case ELS_CMD_PRLO:
9865                 els_data->subcategory = LPFC_EVENT_PRLO_RCV;
9866                 break;
9867         case ELS_CMD_ADISC:
9868                 els_data->subcategory = LPFC_EVENT_ADISC_RCV;
9869                 break;
9870         case ELS_CMD_LOGO:
9871                 els_data->subcategory = LPFC_EVENT_LOGO_RCV;
9872                 /* Copy the WWPN in the LOGO payload */
9873                 memcpy(logo_data->logo_wwpn, &payload[2],
9874                         sizeof(struct lpfc_name));
9875                 break;
9876         default:
9877                 kfree(els_data);
9878                 return;
9879         }
9880         memcpy(els_data->wwpn, &ndlp->nlp_portname, sizeof(struct lpfc_name));
9881         memcpy(els_data->wwnn, &ndlp->nlp_nodename, sizeof(struct lpfc_name));
9882         if (*payload == ELS_CMD_LOGO) {
9883                 fc_host_post_vendor_event(shost,
9884                         fc_get_event_number(),
9885                         sizeof(struct lpfc_logo_event),
9886                         (char *)logo_data,
9887                         LPFC_NL_VENDOR_ID);
9888                 kfree(logo_data);
9889         } else {
9890                 fc_host_post_vendor_event(shost,
9891                         fc_get_event_number(),
9892                         sizeof(struct lpfc_els_event_header),
9893                         (char *)els_data,
9894                         LPFC_NL_VENDOR_ID);
9895                 kfree(els_data);
9896         }
9897
9898         return;
9899 }
9900
9901
9902 DECLARE_ENUM2STR_LOOKUP(lpfc_get_fpin_li_event_nm, fc_fpin_li_event_types,
9903                         FC_FPIN_LI_EVT_TYPES_INIT);
9904
9905 DECLARE_ENUM2STR_LOOKUP(lpfc_get_fpin_deli_event_nm, fc_fpin_deli_event_types,
9906                         FC_FPIN_DELI_EVT_TYPES_INIT);
9907
9908 DECLARE_ENUM2STR_LOOKUP(lpfc_get_fpin_congn_event_nm, fc_fpin_congn_event_types,
9909                         FC_FPIN_CONGN_EVT_TYPES_INIT);
9910
9911 DECLARE_ENUM2STR_LOOKUP(lpfc_get_fpin_congn_severity_nm,
9912                         fc_fpin_congn_severity_types,
9913                         FC_FPIN_CONGN_SEVERITY_INIT);
9914
9915
9916 /**
9917  * lpfc_display_fpin_wwpn - Display WWPNs accessible by the attached port
9918  * @phba: Pointer to phba object.
9919  * @wwnlist: Pointer to list of WWPNs in FPIN payload
9920  * @cnt: count of WWPNs in FPIN payload
9921  *
9922  * This routine is called by LI and PC descriptors.
9923  * Limit the number of WWPNs displayed to 6 log messages, 6 per log message
9924  */
9925 static void
9926 lpfc_display_fpin_wwpn(struct lpfc_hba *phba, __be64 *wwnlist, u32 cnt)
9927 {
9928         char buf[LPFC_FPIN_WWPN_LINE_SZ];
9929         __be64 wwn;
9930         u64 wwpn;
9931         int i, len;
9932         int line = 0;
9933         int wcnt = 0;
9934         bool endit = false;
9935
9936         len = scnprintf(buf, LPFC_FPIN_WWPN_LINE_SZ, "Accessible WWPNs:");
9937         for (i = 0; i < cnt; i++) {
9938                 /* Are we on the last WWPN */
9939                 if (i == (cnt - 1))
9940                         endit = true;
9941
9942                 /* Extract the next WWPN from the payload */
9943                 wwn = *wwnlist++;
9944                 wwpn = be64_to_cpu(wwn);
9945                 len += scnprintf(buf + len, LPFC_FPIN_WWPN_LINE_SZ - len,
9946                                  " %016llx", wwpn);
9947
9948                 /* Log a message if we are on the last WWPN
9949                  * or if we hit the max allowed per message.
9950                  */
9951                 wcnt++;
9952                 if (wcnt == LPFC_FPIN_WWPN_LINE_CNT || endit) {
9953                         buf[len] = 0;
9954                         lpfc_printf_log(phba, KERN_INFO, LOG_ELS,
9955                                         "4686 %s\n", buf);
9956
9957                         /* Check if we reached the last WWPN */
9958                         if (endit)
9959                                 return;
9960
9961                         /* Limit the number of log message displayed per FPIN */
9962                         line++;
9963                         if (line == LPFC_FPIN_WWPN_NUM_LINE) {
9964                                 lpfc_printf_log(phba, KERN_INFO, LOG_ELS,
9965                                                 "4687 %d WWPNs Truncated\n",
9966                                                 cnt - i - 1);
9967                                 return;
9968                         }
9969
9970                         /* Start over with next log message */
9971                         wcnt = 0;
9972                         len = scnprintf(buf, LPFC_FPIN_WWPN_LINE_SZ,
9973                                         "Additional WWPNs:");
9974                 }
9975         }
9976 }
9977
9978 /**
9979  * lpfc_els_rcv_fpin_li - Process an FPIN Link Integrity Event.
9980  * @phba: Pointer to phba object.
9981  * @tlv:  Pointer to the Link Integrity Notification Descriptor.
9982  *
9983  * This function processes a Link Integrity FPIN event by logging a message.
9984  **/
9985 static void
9986 lpfc_els_rcv_fpin_li(struct lpfc_hba *phba, struct fc_tlv_desc *tlv)
9987 {
9988         struct fc_fn_li_desc *li = (struct fc_fn_li_desc *)tlv;
9989         const char *li_evt_str;
9990         u32 li_evt, cnt;
9991
9992         li_evt = be16_to_cpu(li->event_type);
9993         li_evt_str = lpfc_get_fpin_li_event_nm(li_evt);
9994         cnt = be32_to_cpu(li->pname_count);
9995
9996         lpfc_printf_log(phba, KERN_INFO, LOG_ELS,
9997                         "4680 FPIN Link Integrity %s (x%x) "
9998                         "Detecting PN x%016llx Attached PN x%016llx "
9999                         "Duration %d mSecs Count %d Port Cnt %d\n",
10000                         li_evt_str, li_evt,
10001                         be64_to_cpu(li->detecting_wwpn),
10002                         be64_to_cpu(li->attached_wwpn),
10003                         be32_to_cpu(li->event_threshold),
10004                         be32_to_cpu(li->event_count), cnt);
10005
10006         lpfc_display_fpin_wwpn(phba, (__be64 *)&li->pname_list, cnt);
10007 }
10008
10009 /**
10010  * lpfc_els_rcv_fpin_del - Process an FPIN Delivery Event.
10011  * @phba: Pointer to hba object.
10012  * @tlv:  Pointer to the Delivery Notification Descriptor TLV
10013  *
10014  * This function processes a Delivery FPIN event by logging a message.
10015  **/
10016 static void
10017 lpfc_els_rcv_fpin_del(struct lpfc_hba *phba, struct fc_tlv_desc *tlv)
10018 {
10019         struct fc_fn_deli_desc *del = (struct fc_fn_deli_desc *)tlv;
10020         const char *del_rsn_str;
10021         u32 del_rsn;
10022         __be32 *frame;
10023
10024         del_rsn = be16_to_cpu(del->deli_reason_code);
10025         del_rsn_str = lpfc_get_fpin_deli_event_nm(del_rsn);
10026
10027         /* Skip over desc_tag/desc_len header to payload */
10028         frame = (__be32 *)(del + 1);
10029
10030         lpfc_printf_log(phba, KERN_INFO, LOG_ELS,
10031                         "4681 FPIN Delivery %s (x%x) "
10032                         "Detecting PN x%016llx Attached PN x%016llx "
10033                         "DiscHdr0  x%08x "
10034                         "DiscHdr1 x%08x DiscHdr2 x%08x DiscHdr3 x%08x "
10035                         "DiscHdr4 x%08x DiscHdr5 x%08x\n",
10036                         del_rsn_str, del_rsn,
10037                         be64_to_cpu(del->detecting_wwpn),
10038                         be64_to_cpu(del->attached_wwpn),
10039                         be32_to_cpu(frame[0]),
10040                         be32_to_cpu(frame[1]),
10041                         be32_to_cpu(frame[2]),
10042                         be32_to_cpu(frame[3]),
10043                         be32_to_cpu(frame[4]),
10044                         be32_to_cpu(frame[5]));
10045 }
10046
10047 /**
10048  * lpfc_els_rcv_fpin_peer_cgn - Process a FPIN Peer Congestion Event.
10049  * @phba: Pointer to hba object.
10050  * @tlv:  Pointer to the Peer Congestion Notification Descriptor TLV
10051  *
10052  * This function processes a Peer Congestion FPIN event by logging a message.
10053  **/
10054 static void
10055 lpfc_els_rcv_fpin_peer_cgn(struct lpfc_hba *phba, struct fc_tlv_desc *tlv)
10056 {
10057         struct fc_fn_peer_congn_desc *pc = (struct fc_fn_peer_congn_desc *)tlv;
10058         const char *pc_evt_str;
10059         u32 pc_evt, cnt;
10060
10061         pc_evt = be16_to_cpu(pc->event_type);
10062         pc_evt_str = lpfc_get_fpin_congn_event_nm(pc_evt);
10063         cnt = be32_to_cpu(pc->pname_count);
10064
10065         lpfc_printf_log(phba, KERN_INFO, LOG_CGN_MGMT | LOG_ELS,
10066                         "4684 FPIN Peer Congestion %s (x%x) "
10067                         "Duration %d mSecs "
10068                         "Detecting PN x%016llx Attached PN x%016llx "
10069                         "Impacted Port Cnt %d\n",
10070                         pc_evt_str, pc_evt,
10071                         be32_to_cpu(pc->event_period),
10072                         be64_to_cpu(pc->detecting_wwpn),
10073                         be64_to_cpu(pc->attached_wwpn),
10074                         cnt);
10075
10076         lpfc_display_fpin_wwpn(phba, (__be64 *)&pc->pname_list, cnt);
10077 }
10078
10079 /**
10080  * lpfc_els_rcv_fpin_cgn - Process an FPIN Congestion notification
10081  * @phba: Pointer to hba object.
10082  * @tlv:  Pointer to the Congestion Notification Descriptor TLV
10083  *
10084  * This function processes an FPIN Congestion Notifiction.  The notification
10085  * could be an Alarm or Warning.  This routine feeds that data into driver's
10086  * running congestion algorithm. It also processes the FPIN by
10087  * logging a message. It returns 1 to indicate deliver this message
10088  * to the upper layer or 0 to indicate don't deliver it.
10089  **/
10090 static int
10091 lpfc_els_rcv_fpin_cgn(struct lpfc_hba *phba, struct fc_tlv_desc *tlv)
10092 {
10093         struct lpfc_cgn_info *cp;
10094         struct fc_fn_congn_desc *cgn = (struct fc_fn_congn_desc *)tlv;
10095         const char *cgn_evt_str;
10096         u32 cgn_evt;
10097         const char *cgn_sev_str;
10098         u32 cgn_sev;
10099         uint16_t value;
10100         u32 crc;
10101         bool nm_log = false;
10102         int rc = 1;
10103
10104         cgn_evt = be16_to_cpu(cgn->event_type);
10105         cgn_evt_str = lpfc_get_fpin_congn_event_nm(cgn_evt);
10106         cgn_sev = cgn->severity;
10107         cgn_sev_str = lpfc_get_fpin_congn_severity_nm(cgn_sev);
10108
10109         /* The driver only takes action on a Credit Stall or Oversubscription
10110          * event type to engage the IO algorithm.  The driver prints an
10111          * unmaskable message only for Lost Credit and Credit Stall.
10112          * TODO: Still need to have definition of host action on clear,
10113          *       lost credit and device specific event types.
10114          */
10115         switch (cgn_evt) {
10116         case FPIN_CONGN_LOST_CREDIT:
10117                 nm_log = true;
10118                 break;
10119         case FPIN_CONGN_CREDIT_STALL:
10120                 nm_log = true;
10121                 fallthrough;
10122         case FPIN_CONGN_OVERSUBSCRIPTION:
10123                 if (cgn_evt == FPIN_CONGN_OVERSUBSCRIPTION)
10124                         nm_log = false;
10125                 switch (cgn_sev) {
10126                 case FPIN_CONGN_SEVERITY_ERROR:
10127                         /* Take action here for an Alarm event */
10128                         if (phba->cmf_active_mode != LPFC_CFG_OFF) {
10129                                 if (phba->cgn_reg_fpin & LPFC_CGN_FPIN_ALARM) {
10130                                         /* Track of alarm cnt for SYNC_WQE */
10131                                         atomic_inc(&phba->cgn_sync_alarm_cnt);
10132                                 }
10133                                 /* Track alarm cnt for cgn_info regardless
10134                                  * of whether CMF is configured for Signals
10135                                  * or FPINs.
10136                                  */
10137                                 atomic_inc(&phba->cgn_fabric_alarm_cnt);
10138                                 goto cleanup;
10139                         }
10140                         break;
10141                 case FPIN_CONGN_SEVERITY_WARNING:
10142                         /* Take action here for a Warning event */
10143                         if (phba->cmf_active_mode != LPFC_CFG_OFF) {
10144                                 if (phba->cgn_reg_fpin & LPFC_CGN_FPIN_WARN) {
10145                                         /* Track of warning cnt for SYNC_WQE */
10146                                         atomic_inc(&phba->cgn_sync_warn_cnt);
10147                                 }
10148                                 /* Track warning cnt and freq for cgn_info
10149                                  * regardless of whether CMF is configured for
10150                                  * Signals or FPINs.
10151                                  */
10152                                 atomic_inc(&phba->cgn_fabric_warn_cnt);
10153 cleanup:
10154                                 /* Save frequency in ms */
10155                                 phba->cgn_fpin_frequency =
10156                                         be32_to_cpu(cgn->event_period);
10157                                 value = phba->cgn_fpin_frequency;
10158                                 if (phba->cgn_i) {
10159                                         cp = (struct lpfc_cgn_info *)
10160                                                 phba->cgn_i->virt;
10161                                         cp->cgn_alarm_freq =
10162                                                 cpu_to_le16(value);
10163                                         cp->cgn_warn_freq =
10164                                                 cpu_to_le16(value);
10165                                         crc = lpfc_cgn_calc_crc32
10166                                                 (cp,
10167                                                 LPFC_CGN_INFO_SZ,
10168                                                 LPFC_CGN_CRC32_SEED);
10169                                         cp->cgn_info_crc = cpu_to_le32(crc);
10170                                 }
10171
10172                                 /* Don't deliver to upper layer since
10173                                  * driver took action on this tlv.
10174                                  */
10175                                 rc = 0;
10176                         }
10177                         break;
10178                 }
10179                 break;
10180         }
10181
10182         /* Change the log level to unmaskable for the following event types. */
10183         lpfc_printf_log(phba, (nm_log ? KERN_WARNING : KERN_INFO),
10184                         LOG_CGN_MGMT | LOG_ELS,
10185                         "4683 FPIN CONGESTION %s type %s (x%x) Event "
10186                         "Duration %d mSecs\n",
10187                         cgn_sev_str, cgn_evt_str, cgn_evt,
10188                         be32_to_cpu(cgn->event_period));
10189         return rc;
10190 }
10191
10192 void
10193 lpfc_els_rcv_fpin(struct lpfc_vport *vport, void *p, u32 fpin_length)
10194 {
10195         struct lpfc_hba *phba = vport->phba;
10196         struct fc_els_fpin *fpin = (struct fc_els_fpin *)p;
10197         struct fc_tlv_desc *tlv, *first_tlv, *current_tlv;
10198         const char *dtag_nm;
10199         int desc_cnt = 0, bytes_remain, cnt;
10200         u32 dtag, deliver = 0;
10201         int len;
10202
10203         /* FPINs handled only if we are in the right discovery state */
10204         if (vport->port_state < LPFC_DISC_AUTH)
10205                 return;
10206
10207         /* make sure there is the full fpin header */
10208         if (fpin_length < sizeof(struct fc_els_fpin))
10209                 return;
10210
10211         /* Sanity check descriptor length. The desc_len value does not
10212          * include space for the ELS command and the desc_len fields.
10213          */
10214         len = be32_to_cpu(fpin->desc_len);
10215         if (fpin_length < len + sizeof(struct fc_els_fpin)) {
10216                 lpfc_printf_log(phba, KERN_WARNING, LOG_CGN_MGMT,
10217                                 "4671 Bad ELS FPIN length %d: %d\n",
10218                                 len, fpin_length);
10219                 return;
10220         }
10221
10222         tlv = (struct fc_tlv_desc *)&fpin->fpin_desc[0];
10223         first_tlv = tlv;
10224         bytes_remain = fpin_length - offsetof(struct fc_els_fpin, fpin_desc);
10225         bytes_remain = min_t(u32, bytes_remain, be32_to_cpu(fpin->desc_len));
10226
10227         /* process each descriptor separately */
10228         while (bytes_remain >= FC_TLV_DESC_HDR_SZ &&
10229                bytes_remain >= FC_TLV_DESC_SZ_FROM_LENGTH(tlv)) {
10230                 dtag = be32_to_cpu(tlv->desc_tag);
10231                 switch (dtag) {
10232                 case ELS_DTAG_LNK_INTEGRITY:
10233                         lpfc_els_rcv_fpin_li(phba, tlv);
10234                         deliver = 1;
10235                         break;
10236                 case ELS_DTAG_DELIVERY:
10237                         lpfc_els_rcv_fpin_del(phba, tlv);
10238                         deliver = 1;
10239                         break;
10240                 case ELS_DTAG_PEER_CONGEST:
10241                         lpfc_els_rcv_fpin_peer_cgn(phba, tlv);
10242                         deliver = 1;
10243                         break;
10244                 case ELS_DTAG_CONGESTION:
10245                         deliver = lpfc_els_rcv_fpin_cgn(phba, tlv);
10246                         break;
10247                 default:
10248                         dtag_nm = lpfc_get_tlv_dtag_nm(dtag);
10249                         lpfc_printf_log(phba, KERN_WARNING, LOG_CGN_MGMT,
10250                                         "4678 unknown FPIN descriptor[%d]: "
10251                                         "tag x%x (%s)\n",
10252                                         desc_cnt, dtag, dtag_nm);
10253
10254                         /* If descriptor is bad, drop the rest of the data */
10255                         return;
10256                 }
10257                 lpfc_cgn_update_stat(phba, dtag);
10258                 cnt = be32_to_cpu(tlv->desc_len);
10259
10260                 /* Sanity check descriptor length. The desc_len value does not
10261                  * include space for the desc_tag and the desc_len fields.
10262                  */
10263                 len -= (cnt + sizeof(struct fc_tlv_desc));
10264                 if (len < 0) {
10265                         dtag_nm = lpfc_get_tlv_dtag_nm(dtag);
10266                         lpfc_printf_log(phba, KERN_WARNING, LOG_CGN_MGMT,
10267                                         "4672 Bad FPIN descriptor TLV length "
10268                                         "%d: %d %d %s\n",
10269                                         cnt, len, fpin_length, dtag_nm);
10270                         return;
10271                 }
10272
10273                 current_tlv = tlv;
10274                 bytes_remain -= FC_TLV_DESC_SZ_FROM_LENGTH(tlv);
10275                 tlv = fc_tlv_next_desc(tlv);
10276
10277                 /* Format payload such that the FPIN delivered to the
10278                  * upper layer is a single descriptor FPIN.
10279                  */
10280                 if (desc_cnt)
10281                         memcpy(first_tlv, current_tlv,
10282                                (cnt + sizeof(struct fc_els_fpin)));
10283
10284                 /* Adjust the length so that it only reflects a
10285                  * single descriptor FPIN.
10286                  */
10287                 fpin_length = cnt + sizeof(struct fc_els_fpin);
10288                 fpin->desc_len = cpu_to_be32(fpin_length);
10289                 fpin_length += sizeof(struct fc_els_fpin); /* the entire FPIN */
10290
10291                 /* Send every descriptor individually to the upper layer */
10292                 if (deliver)
10293                         fc_host_fpin_rcv(lpfc_shost_from_vport(vport),
10294                                          fpin_length, (char *)fpin, 0);
10295                 desc_cnt++;
10296         }
10297 }
10298
10299 /**
10300  * lpfc_els_unsol_buffer - Process an unsolicited event data buffer
10301  * @phba: pointer to lpfc hba data structure.
10302  * @pring: pointer to a SLI ring.
10303  * @vport: pointer to a host virtual N_Port data structure.
10304  * @elsiocb: pointer to lpfc els command iocb data structure.
10305  *
10306  * This routine is used for processing the IOCB associated with a unsolicited
10307  * event. It first determines whether there is an existing ndlp that matches
10308  * the DID from the unsolicited IOCB. If not, it will create a new one with
10309  * the DID from the unsolicited IOCB. The ELS command from the unsolicited
10310  * IOCB is then used to invoke the proper routine and to set up proper state
10311  * of the discovery state machine.
10312  **/
10313 static void
10314 lpfc_els_unsol_buffer(struct lpfc_hba *phba, struct lpfc_sli_ring *pring,
10315                       struct lpfc_vport *vport, struct lpfc_iocbq *elsiocb)
10316 {
10317         struct lpfc_nodelist *ndlp;
10318         struct ls_rjt stat;
10319         u32 *payload, payload_len;
10320         u32 cmd = 0, did = 0, newnode, status = 0;
10321         uint8_t rjt_exp, rjt_err = 0, init_link = 0;
10322         struct lpfc_wcqe_complete *wcqe_cmpl = NULL;
10323         LPFC_MBOXQ_t *mbox;
10324
10325         if (!vport || !elsiocb->cmd_dmabuf)
10326                 goto dropit;
10327
10328         newnode = 0;
10329         wcqe_cmpl = &elsiocb->wcqe_cmpl;
10330         payload = elsiocb->cmd_dmabuf->virt;
10331         if (phba->sli_rev == LPFC_SLI_REV4)
10332                 payload_len = wcqe_cmpl->total_data_placed;
10333         else
10334                 payload_len = elsiocb->iocb.unsli3.rcvsli3.acc_len;
10335         status = get_job_ulpstatus(phba, elsiocb);
10336         cmd = *payload;
10337         if ((phba->sli3_options & LPFC_SLI3_HBQ_ENABLED) == 0)
10338                 lpfc_sli3_post_buffer(phba, pring, 1);
10339
10340         did = get_job_els_rsp64_did(phba, elsiocb);
10341         if (status) {
10342                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10343                         "RCV Unsol ELS:  status:x%x/x%x did:x%x",
10344                         status, get_job_word4(phba, elsiocb), did);
10345                 goto dropit;
10346         }
10347
10348         /* Check to see if link went down during discovery */
10349         if (lpfc_els_chk_latt(vport))
10350                 goto dropit;
10351
10352         /* Ignore traffic received during vport shutdown. */
10353         if (vport->load_flag & FC_UNLOADING)
10354                 goto dropit;
10355
10356         /* If NPort discovery is delayed drop incoming ELS */
10357         if ((vport->fc_flag & FC_DISC_DELAYED) &&
10358                         (cmd != ELS_CMD_PLOGI))
10359                 goto dropit;
10360
10361         ndlp = lpfc_findnode_did(vport, did);
10362         if (!ndlp) {
10363                 /* Cannot find existing Fabric ndlp, so allocate a new one */
10364                 ndlp = lpfc_nlp_init(vport, did);
10365                 if (!ndlp)
10366                         goto dropit;
10367                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
10368                 newnode = 1;
10369                 if ((did & Fabric_DID_MASK) == Fabric_DID_MASK)
10370                         ndlp->nlp_type |= NLP_FABRIC;
10371         } else if (ndlp->nlp_state == NLP_STE_UNUSED_NODE) {
10372                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
10373                 newnode = 1;
10374         }
10375
10376         phba->fc_stat.elsRcvFrame++;
10377
10378         /*
10379          * Do not process any unsolicited ELS commands
10380          * if the ndlp is in DEV_LOSS
10381          */
10382         spin_lock_irq(&ndlp->lock);
10383         if (ndlp->nlp_flag & NLP_IN_DEV_LOSS) {
10384                 spin_unlock_irq(&ndlp->lock);
10385                 if (newnode)
10386                         lpfc_nlp_put(ndlp);
10387                 goto dropit;
10388         }
10389         spin_unlock_irq(&ndlp->lock);
10390
10391         elsiocb->ndlp = lpfc_nlp_get(ndlp);
10392         if (!elsiocb->ndlp)
10393                 goto dropit;
10394         elsiocb->vport = vport;
10395
10396         if ((cmd & ELS_CMD_MASK) == ELS_CMD_RSCN) {
10397                 cmd &= ELS_CMD_MASK;
10398         }
10399         /* ELS command <elsCmd> received from NPORT <did> */
10400         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
10401                          "0112 ELS command x%x received from NPORT x%x "
10402                          "refcnt %d Data: x%x x%x x%x x%x\n",
10403                          cmd, did, kref_read(&ndlp->kref), vport->port_state,
10404                          vport->fc_flag, vport->fc_myDID, vport->fc_prevDID);
10405
10406         /* reject till our FLOGI completes or PLOGI assigned DID via PT2PT */
10407         if ((vport->port_state < LPFC_FABRIC_CFG_LINK) &&
10408             (cmd != ELS_CMD_FLOGI) &&
10409             !((cmd == ELS_CMD_PLOGI) && (vport->fc_flag & FC_PT2PT))) {
10410                 rjt_err = LSRJT_LOGICAL_BSY;
10411                 rjt_exp = LSEXP_NOTHING_MORE;
10412                 goto lsrjt;
10413         }
10414
10415         switch (cmd) {
10416         case ELS_CMD_PLOGI:
10417                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10418                         "RCV PLOGI:       did:x%x/ste:x%x flg:x%x",
10419                         did, vport->port_state, ndlp->nlp_flag);
10420
10421                 phba->fc_stat.elsRcvPLOGI++;
10422                 ndlp = lpfc_plogi_confirm_nport(phba, payload, ndlp);
10423                 if (phba->sli_rev == LPFC_SLI_REV4 &&
10424                     (phba->pport->fc_flag & FC_PT2PT)) {
10425                         vport->fc_prevDID = vport->fc_myDID;
10426                         /* Our DID needs to be updated before registering
10427                          * the vfi. This is done in lpfc_rcv_plogi but
10428                          * that is called after the reg_vfi.
10429                          */
10430                         vport->fc_myDID =
10431                                 bf_get(els_rsp64_sid,
10432                                        &elsiocb->wqe.xmit_els_rsp);
10433                         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
10434                                          "3312 Remote port assigned DID x%x "
10435                                          "%x\n", vport->fc_myDID,
10436                                          vport->fc_prevDID);
10437                 }
10438
10439                 lpfc_send_els_event(vport, ndlp, payload);
10440
10441                 /* If Nport discovery is delayed, reject PLOGIs */
10442                 if (vport->fc_flag & FC_DISC_DELAYED) {
10443                         rjt_err = LSRJT_UNABLE_TPC;
10444                         rjt_exp = LSEXP_NOTHING_MORE;
10445                         break;
10446                 }
10447
10448                 if (vport->port_state < LPFC_DISC_AUTH) {
10449                         if (!(phba->pport->fc_flag & FC_PT2PT) ||
10450                                 (phba->pport->fc_flag & FC_PT2PT_PLOGI)) {
10451                                 rjt_err = LSRJT_UNABLE_TPC;
10452                                 rjt_exp = LSEXP_NOTHING_MORE;
10453                                 break;
10454                         }
10455                 }
10456
10457                 spin_lock_irq(&ndlp->lock);
10458                 ndlp->nlp_flag &= ~NLP_TARGET_REMOVE;
10459                 spin_unlock_irq(&ndlp->lock);
10460
10461                 lpfc_disc_state_machine(vport, ndlp, elsiocb,
10462                                         NLP_EVT_RCV_PLOGI);
10463
10464                 break;
10465         case ELS_CMD_FLOGI:
10466                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10467                         "RCV FLOGI:       did:x%x/ste:x%x flg:x%x",
10468                         did, vport->port_state, ndlp->nlp_flag);
10469
10470                 phba->fc_stat.elsRcvFLOGI++;
10471
10472                 /* If the driver believes fabric discovery is done and is ready,
10473                  * bounce the link.  There is some descrepancy.
10474                  */
10475                 if (vport->port_state >= LPFC_LOCAL_CFG_LINK &&
10476                     vport->fc_flag & FC_PT2PT &&
10477                     vport->rcv_flogi_cnt >= 1) {
10478                         rjt_err = LSRJT_LOGICAL_BSY;
10479                         rjt_exp = LSEXP_NOTHING_MORE;
10480                         init_link++;
10481                         goto lsrjt;
10482                 }
10483
10484                 lpfc_els_rcv_flogi(vport, elsiocb, ndlp);
10485                 /* retain node if our response is deferred */
10486                 if (phba->defer_flogi_acc_flag)
10487                         break;
10488                 if (newnode)
10489                         lpfc_disc_state_machine(vport, ndlp, NULL,
10490                                         NLP_EVT_DEVICE_RM);
10491                 break;
10492         case ELS_CMD_LOGO:
10493                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10494                         "RCV LOGO:        did:x%x/ste:x%x flg:x%x",
10495                         did, vport->port_state, ndlp->nlp_flag);
10496
10497                 phba->fc_stat.elsRcvLOGO++;
10498                 lpfc_send_els_event(vport, ndlp, payload);
10499                 if (vport->port_state < LPFC_DISC_AUTH) {
10500                         rjt_err = LSRJT_UNABLE_TPC;
10501                         rjt_exp = LSEXP_NOTHING_MORE;
10502                         break;
10503                 }
10504                 lpfc_disc_state_machine(vport, ndlp, elsiocb, NLP_EVT_RCV_LOGO);
10505                 if (newnode)
10506                         lpfc_disc_state_machine(vport, ndlp, NULL,
10507                                         NLP_EVT_DEVICE_RM);
10508                 break;
10509         case ELS_CMD_PRLO:
10510                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10511                         "RCV PRLO:        did:x%x/ste:x%x flg:x%x",
10512                         did, vport->port_state, ndlp->nlp_flag);
10513
10514                 phba->fc_stat.elsRcvPRLO++;
10515                 lpfc_send_els_event(vport, ndlp, payload);
10516                 if (vport->port_state < LPFC_DISC_AUTH) {
10517                         rjt_err = LSRJT_UNABLE_TPC;
10518                         rjt_exp = LSEXP_NOTHING_MORE;
10519                         break;
10520                 }
10521                 lpfc_disc_state_machine(vport, ndlp, elsiocb, NLP_EVT_RCV_PRLO);
10522                 break;
10523         case ELS_CMD_LCB:
10524                 phba->fc_stat.elsRcvLCB++;
10525                 lpfc_els_rcv_lcb(vport, elsiocb, ndlp);
10526                 break;
10527         case ELS_CMD_RDP:
10528                 phba->fc_stat.elsRcvRDP++;
10529                 lpfc_els_rcv_rdp(vport, elsiocb, ndlp);
10530                 break;
10531         case ELS_CMD_RSCN:
10532                 phba->fc_stat.elsRcvRSCN++;
10533                 lpfc_els_rcv_rscn(vport, elsiocb, ndlp);
10534                 if (newnode)
10535                         lpfc_disc_state_machine(vport, ndlp, NULL,
10536                                         NLP_EVT_DEVICE_RM);
10537                 break;
10538         case ELS_CMD_ADISC:
10539                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10540                         "RCV ADISC:       did:x%x/ste:x%x flg:x%x",
10541                         did, vport->port_state, ndlp->nlp_flag);
10542
10543                 lpfc_send_els_event(vport, ndlp, payload);
10544                 phba->fc_stat.elsRcvADISC++;
10545                 if (vport->port_state < LPFC_DISC_AUTH) {
10546                         rjt_err = LSRJT_UNABLE_TPC;
10547                         rjt_exp = LSEXP_NOTHING_MORE;
10548                         break;
10549                 }
10550                 lpfc_disc_state_machine(vport, ndlp, elsiocb,
10551                                         NLP_EVT_RCV_ADISC);
10552                 break;
10553         case ELS_CMD_PDISC:
10554                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10555                         "RCV PDISC:       did:x%x/ste:x%x flg:x%x",
10556                         did, vport->port_state, ndlp->nlp_flag);
10557
10558                 phba->fc_stat.elsRcvPDISC++;
10559                 if (vport->port_state < LPFC_DISC_AUTH) {
10560                         rjt_err = LSRJT_UNABLE_TPC;
10561                         rjt_exp = LSEXP_NOTHING_MORE;
10562                         break;
10563                 }
10564                 lpfc_disc_state_machine(vport, ndlp, elsiocb,
10565                                         NLP_EVT_RCV_PDISC);
10566                 break;
10567         case ELS_CMD_FARPR:
10568                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10569                         "RCV FARPR:       did:x%x/ste:x%x flg:x%x",
10570                         did, vport->port_state, ndlp->nlp_flag);
10571
10572                 phba->fc_stat.elsRcvFARPR++;
10573                 lpfc_els_rcv_farpr(vport, elsiocb, ndlp);
10574                 break;
10575         case ELS_CMD_FARP:
10576                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10577                         "RCV FARP:        did:x%x/ste:x%x flg:x%x",
10578                         did, vport->port_state, ndlp->nlp_flag);
10579
10580                 phba->fc_stat.elsRcvFARP++;
10581                 lpfc_els_rcv_farp(vport, elsiocb, ndlp);
10582                 break;
10583         case ELS_CMD_FAN:
10584                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10585                         "RCV FAN:         did:x%x/ste:x%x flg:x%x",
10586                         did, vport->port_state, ndlp->nlp_flag);
10587
10588                 phba->fc_stat.elsRcvFAN++;
10589                 lpfc_els_rcv_fan(vport, elsiocb, ndlp);
10590                 break;
10591         case ELS_CMD_PRLI:
10592         case ELS_CMD_NVMEPRLI:
10593                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10594                         "RCV PRLI:        did:x%x/ste:x%x flg:x%x",
10595                         did, vport->port_state, ndlp->nlp_flag);
10596
10597                 phba->fc_stat.elsRcvPRLI++;
10598                 if ((vport->port_state < LPFC_DISC_AUTH) &&
10599                     (vport->fc_flag & FC_FABRIC)) {
10600                         rjt_err = LSRJT_UNABLE_TPC;
10601                         rjt_exp = LSEXP_NOTHING_MORE;
10602                         break;
10603                 }
10604                 lpfc_disc_state_machine(vport, ndlp, elsiocb, NLP_EVT_RCV_PRLI);
10605                 break;
10606         case ELS_CMD_LIRR:
10607                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10608                         "RCV LIRR:        did:x%x/ste:x%x flg:x%x",
10609                         did, vport->port_state, ndlp->nlp_flag);
10610
10611                 phba->fc_stat.elsRcvLIRR++;
10612                 lpfc_els_rcv_lirr(vport, elsiocb, ndlp);
10613                 if (newnode)
10614                         lpfc_disc_state_machine(vport, ndlp, NULL,
10615                                         NLP_EVT_DEVICE_RM);
10616                 break;
10617         case ELS_CMD_RLS:
10618                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10619                         "RCV RLS:         did:x%x/ste:x%x flg:x%x",
10620                         did, vport->port_state, ndlp->nlp_flag);
10621
10622                 phba->fc_stat.elsRcvRLS++;
10623                 lpfc_els_rcv_rls(vport, elsiocb, ndlp);
10624                 if (newnode)
10625                         lpfc_disc_state_machine(vport, ndlp, NULL,
10626                                         NLP_EVT_DEVICE_RM);
10627                 break;
10628         case ELS_CMD_RPL:
10629                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10630                         "RCV RPL:         did:x%x/ste:x%x flg:x%x",
10631                         did, vport->port_state, ndlp->nlp_flag);
10632
10633                 phba->fc_stat.elsRcvRPL++;
10634                 lpfc_els_rcv_rpl(vport, elsiocb, ndlp);
10635                 if (newnode)
10636                         lpfc_disc_state_machine(vport, ndlp, NULL,
10637                                         NLP_EVT_DEVICE_RM);
10638                 break;
10639         case ELS_CMD_RNID:
10640                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10641                         "RCV RNID:        did:x%x/ste:x%x flg:x%x",
10642                         did, vport->port_state, ndlp->nlp_flag);
10643
10644                 phba->fc_stat.elsRcvRNID++;
10645                 lpfc_els_rcv_rnid(vport, elsiocb, ndlp);
10646                 if (newnode)
10647                         lpfc_disc_state_machine(vport, ndlp, NULL,
10648                                         NLP_EVT_DEVICE_RM);
10649                 break;
10650         case ELS_CMD_RTV:
10651                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10652                         "RCV RTV:        did:x%x/ste:x%x flg:x%x",
10653                         did, vport->port_state, ndlp->nlp_flag);
10654                 phba->fc_stat.elsRcvRTV++;
10655                 lpfc_els_rcv_rtv(vport, elsiocb, ndlp);
10656                 if (newnode)
10657                         lpfc_disc_state_machine(vport, ndlp, NULL,
10658                                         NLP_EVT_DEVICE_RM);
10659                 break;
10660         case ELS_CMD_RRQ:
10661                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10662                         "RCV RRQ:         did:x%x/ste:x%x flg:x%x",
10663                         did, vport->port_state, ndlp->nlp_flag);
10664
10665                 phba->fc_stat.elsRcvRRQ++;
10666                 lpfc_els_rcv_rrq(vport, elsiocb, ndlp);
10667                 if (newnode)
10668                         lpfc_disc_state_machine(vport, ndlp, NULL,
10669                                         NLP_EVT_DEVICE_RM);
10670                 break;
10671         case ELS_CMD_ECHO:
10672                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10673                         "RCV ECHO:        did:x%x/ste:x%x flg:x%x",
10674                         did, vport->port_state, ndlp->nlp_flag);
10675
10676                 phba->fc_stat.elsRcvECHO++;
10677                 lpfc_els_rcv_echo(vport, elsiocb, ndlp);
10678                 if (newnode)
10679                         lpfc_disc_state_machine(vport, ndlp, NULL,
10680                                         NLP_EVT_DEVICE_RM);
10681                 break;
10682         case ELS_CMD_REC:
10683                 /* receive this due to exchange closed */
10684                 rjt_err = LSRJT_UNABLE_TPC;
10685                 rjt_exp = LSEXP_INVALID_OX_RX;
10686                 break;
10687         case ELS_CMD_FPIN:
10688                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10689                                       "RCV FPIN:       did:x%x/ste:x%x flg:x%x",
10690                                       did, vport->port_state, ndlp->nlp_flag);
10691
10692                 lpfc_els_rcv_fpin(vport, (struct fc_els_fpin *)payload,
10693                                   payload_len);
10694
10695                 /* There are no replies, so no rjt codes */
10696                 break;
10697         case ELS_CMD_EDC:
10698                 lpfc_els_rcv_edc(vport, elsiocb, ndlp);
10699                 break;
10700         case ELS_CMD_RDF:
10701                 phba->fc_stat.elsRcvRDF++;
10702                 /* Accept RDF only from fabric controller */
10703                 if (did != Fabric_Cntl_DID) {
10704                         lpfc_printf_vlog(vport, KERN_WARNING, LOG_ELS,
10705                                          "1115 Received RDF from invalid DID "
10706                                          "x%x\n", did);
10707                         rjt_err = LSRJT_PROTOCOL_ERR;
10708                         rjt_exp = LSEXP_NOTHING_MORE;
10709                         goto lsrjt;
10710                 }
10711
10712                 lpfc_els_rcv_rdf(vport, elsiocb, ndlp);
10713                 break;
10714         default:
10715                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10716                         "RCV ELS cmd:     cmd:x%x did:x%x/ste:x%x",
10717                         cmd, did, vport->port_state);
10718
10719                 /* Unsupported ELS command, reject */
10720                 rjt_err = LSRJT_CMD_UNSUPPORTED;
10721                 rjt_exp = LSEXP_NOTHING_MORE;
10722
10723                 /* Unknown ELS command <elsCmd> received from NPORT <did> */
10724                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
10725                                  "0115 Unknown ELS command x%x "
10726                                  "received from NPORT x%x\n", cmd, did);
10727                 if (newnode)
10728                         lpfc_disc_state_machine(vport, ndlp, NULL,
10729                                         NLP_EVT_DEVICE_RM);
10730                 break;
10731         }
10732
10733 lsrjt:
10734         /* check if need to LS_RJT received ELS cmd */
10735         if (rjt_err) {
10736                 memset(&stat, 0, sizeof(stat));
10737                 stat.un.b.lsRjtRsnCode = rjt_err;
10738                 stat.un.b.lsRjtRsnCodeExp = rjt_exp;
10739                 lpfc_els_rsp_reject(vport, stat.un.lsRjtError, elsiocb, ndlp,
10740                                     NULL);
10741                 /* Remove the reference from above for new nodes. */
10742                 if (newnode)
10743                         lpfc_disc_state_machine(vport, ndlp, NULL,
10744                                         NLP_EVT_DEVICE_RM);
10745         }
10746
10747         /* Release the reference on this elsiocb, not the ndlp. */
10748         lpfc_nlp_put(elsiocb->ndlp);
10749         elsiocb->ndlp = NULL;
10750
10751         /* Special case.  Driver received an unsolicited command that
10752          * unsupportable given the driver's current state.  Reset the
10753          * link and start over.
10754          */
10755         if (init_link) {
10756                 mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
10757                 if (!mbox)
10758                         return;
10759                 lpfc_linkdown(phba);
10760                 lpfc_init_link(phba, mbox,
10761                                phba->cfg_topology,
10762                                phba->cfg_link_speed);
10763                 mbox->u.mb.un.varInitLnk.lipsr_AL_PA = 0;
10764                 mbox->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
10765                 mbox->vport = vport;
10766                 if (lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT) ==
10767                     MBX_NOT_FINISHED)
10768                         mempool_free(mbox, phba->mbox_mem_pool);
10769         }
10770
10771         return;
10772
10773 dropit:
10774         if (vport && !(vport->load_flag & FC_UNLOADING))
10775                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
10776                         "0111 Dropping received ELS cmd "
10777                         "Data: x%x x%x x%x x%x\n",
10778                         cmd, status, get_job_word4(phba, elsiocb), did);
10779
10780         phba->fc_stat.elsRcvDrop++;
10781 }
10782
10783 /**
10784  * lpfc_els_unsol_event - Process an unsolicited event from an els sli ring
10785  * @phba: pointer to lpfc hba data structure.
10786  * @pring: pointer to a SLI ring.
10787  * @elsiocb: pointer to lpfc els iocb data structure.
10788  *
10789  * This routine is used to process an unsolicited event received from a SLI
10790  * (Service Level Interface) ring. The actual processing of the data buffer
10791  * associated with the unsolicited event is done by invoking the routine
10792  * lpfc_els_unsol_buffer() after properly set up the iocb buffer from the
10793  * SLI ring on which the unsolicited event was received.
10794  **/
10795 void
10796 lpfc_els_unsol_event(struct lpfc_hba *phba, struct lpfc_sli_ring *pring,
10797                      struct lpfc_iocbq *elsiocb)
10798 {
10799         struct lpfc_vport *vport = elsiocb->vport;
10800         u32 ulp_command, status, parameter, bde_count = 0;
10801         IOCB_t *icmd;
10802         struct lpfc_wcqe_complete *wcqe_cmpl = NULL;
10803         struct lpfc_dmabuf *bdeBuf1 = elsiocb->cmd_dmabuf;
10804         struct lpfc_dmabuf *bdeBuf2 = elsiocb->bpl_dmabuf;
10805         dma_addr_t paddr;
10806
10807         elsiocb->cmd_dmabuf = NULL;
10808         elsiocb->rsp_dmabuf = NULL;
10809         elsiocb->bpl_dmabuf = NULL;
10810
10811         wcqe_cmpl = &elsiocb->wcqe_cmpl;
10812         ulp_command = get_job_cmnd(phba, elsiocb);
10813         status = get_job_ulpstatus(phba, elsiocb);
10814         parameter = get_job_word4(phba, elsiocb);
10815         if (phba->sli_rev == LPFC_SLI_REV4)
10816                 bde_count = wcqe_cmpl->word3;
10817         else
10818                 bde_count = elsiocb->iocb.ulpBdeCount;
10819
10820         if (status == IOSTAT_NEED_BUFFER) {
10821                 lpfc_sli_hbqbuf_add_hbqs(phba, LPFC_ELS_HBQ);
10822         } else if (status == IOSTAT_LOCAL_REJECT &&
10823                    (parameter & IOERR_PARAM_MASK) ==
10824                    IOERR_RCV_BUFFER_WAITING) {
10825                 phba->fc_stat.NoRcvBuf++;
10826                 /* Not enough posted buffers; Try posting more buffers */
10827                 if (!(phba->sli3_options & LPFC_SLI3_HBQ_ENABLED))
10828                         lpfc_sli3_post_buffer(phba, pring, 0);
10829                 return;
10830         }
10831
10832         if (phba->sli_rev == LPFC_SLI_REV3) {
10833                 icmd = &elsiocb->iocb;
10834                 if ((phba->sli3_options & LPFC_SLI3_NPIV_ENABLED) &&
10835                     (ulp_command == CMD_IOCB_RCV_ELS64_CX ||
10836                      ulp_command == CMD_IOCB_RCV_SEQ64_CX)) {
10837                         if (icmd->unsli3.rcvsli3.vpi == 0xffff)
10838                                 vport = phba->pport;
10839                         else
10840                                 vport = lpfc_find_vport_by_vpid(phba,
10841                                                 icmd->unsli3.rcvsli3.vpi);
10842                 }
10843         }
10844
10845         /* If there are no BDEs associated
10846          * with this IOCB, there is nothing to do.
10847          */
10848         if (bde_count == 0)
10849                 return;
10850
10851         /* Account for SLI2 or SLI3 and later unsolicited buffering */
10852         if (phba->sli3_options & LPFC_SLI3_HBQ_ENABLED) {
10853                 elsiocb->cmd_dmabuf = bdeBuf1;
10854                 if (bde_count == 2)
10855                         elsiocb->bpl_dmabuf = bdeBuf2;
10856         } else {
10857                 icmd = &elsiocb->iocb;
10858                 paddr = getPaddr(icmd->un.cont64[0].addrHigh,
10859                                  icmd->un.cont64[0].addrLow);
10860                 elsiocb->cmd_dmabuf = lpfc_sli_ringpostbuf_get(phba, pring,
10861                                                                paddr);
10862                 if (bde_count == 2) {
10863                         paddr = getPaddr(icmd->un.cont64[1].addrHigh,
10864                                          icmd->un.cont64[1].addrLow);
10865                         elsiocb->bpl_dmabuf = lpfc_sli_ringpostbuf_get(phba,
10866                                                                         pring,
10867                                                                         paddr);
10868                 }
10869         }
10870
10871         lpfc_els_unsol_buffer(phba, pring, vport, elsiocb);
10872         /*
10873          * The different unsolicited event handlers would tell us
10874          * if they are done with "mp" by setting cmd_dmabuf to NULL.
10875          */
10876         if (elsiocb->cmd_dmabuf) {
10877                 lpfc_in_buf_free(phba, elsiocb->cmd_dmabuf);
10878                 elsiocb->cmd_dmabuf = NULL;
10879         }
10880
10881         if (elsiocb->bpl_dmabuf) {
10882                 lpfc_in_buf_free(phba, elsiocb->bpl_dmabuf);
10883                 elsiocb->bpl_dmabuf = NULL;
10884         }
10885
10886 }
10887
10888 static void
10889 lpfc_start_fdmi(struct lpfc_vport *vport)
10890 {
10891         struct lpfc_nodelist *ndlp;
10892
10893         /* If this is the first time, allocate an ndlp and initialize
10894          * it. Otherwise, make sure the node is enabled and then do the
10895          * login.
10896          */
10897         ndlp = lpfc_findnode_did(vport, FDMI_DID);
10898         if (!ndlp) {
10899                 ndlp = lpfc_nlp_init(vport, FDMI_DID);
10900                 if (ndlp) {
10901                         ndlp->nlp_type |= NLP_FABRIC;
10902                 } else {
10903                         return;
10904                 }
10905         }
10906
10907         lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
10908         lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0);
10909 }
10910
10911 /**
10912  * lpfc_do_scr_ns_plogi - Issue a plogi to the name server for scr
10913  * @phba: pointer to lpfc hba data structure.
10914  * @vport: pointer to a virtual N_Port data structure.
10915  *
10916  * This routine issues a Port Login (PLOGI) to the Name Server with
10917  * State Change Request (SCR) for a @vport. This routine will create an
10918  * ndlp for the Name Server associated to the @vport if such node does
10919  * not already exist. The PLOGI to Name Server is issued by invoking the
10920  * lpfc_issue_els_plogi() routine. If Fabric-Device Management Interface
10921  * (FDMI) is configured to the @vport, a FDMI node will be created and
10922  * the PLOGI to FDMI is issued by invoking lpfc_issue_els_plogi() routine.
10923  **/
10924 void
10925 lpfc_do_scr_ns_plogi(struct lpfc_hba *phba, struct lpfc_vport *vport)
10926 {
10927         struct lpfc_nodelist *ndlp;
10928         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
10929
10930         /*
10931          * If lpfc_delay_discovery parameter is set and the clean address
10932          * bit is cleared and fc fabric parameters chenged, delay FC NPort
10933          * discovery.
10934          */
10935         spin_lock_irq(shost->host_lock);
10936         if (vport->fc_flag & FC_DISC_DELAYED) {
10937                 spin_unlock_irq(shost->host_lock);
10938                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
10939                                  "3334 Delay fc port discovery for %d secs\n",
10940                                  phba->fc_ratov);
10941                 mod_timer(&vport->delayed_disc_tmo,
10942                         jiffies + msecs_to_jiffies(1000 * phba->fc_ratov));
10943                 return;
10944         }
10945         spin_unlock_irq(shost->host_lock);
10946
10947         ndlp = lpfc_findnode_did(vport, NameServer_DID);
10948         if (!ndlp) {
10949                 ndlp = lpfc_nlp_init(vport, NameServer_DID);
10950                 if (!ndlp) {
10951                         if (phba->fc_topology == LPFC_TOPOLOGY_LOOP) {
10952                                 lpfc_disc_start(vport);
10953                                 return;
10954                         }
10955                         lpfc_vport_set_state(vport, FC_VPORT_FAILED);
10956                         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
10957                                          "0251 NameServer login: no memory\n");
10958                         return;
10959                 }
10960         }
10961
10962         ndlp->nlp_type |= NLP_FABRIC;
10963
10964         lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
10965
10966         if (lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0)) {
10967                 lpfc_vport_set_state(vport, FC_VPORT_FAILED);
10968                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
10969                                  "0252 Cannot issue NameServer login\n");
10970                 return;
10971         }
10972
10973         if ((phba->cfg_enable_SmartSAN ||
10974              (phba->cfg_fdmi_on == LPFC_FDMI_SUPPORT)) &&
10975              (vport->load_flag & FC_ALLOW_FDMI))
10976                 lpfc_start_fdmi(vport);
10977 }
10978
10979 /**
10980  * lpfc_cmpl_reg_new_vport - Completion callback function to register new vport
10981  * @phba: pointer to lpfc hba data structure.
10982  * @pmb: pointer to the driver internal queue element for mailbox command.
10983  *
10984  * This routine is the completion callback function to register new vport
10985  * mailbox command. If the new vport mailbox command completes successfully,
10986  * the fabric registration login shall be performed on physical port (the
10987  * new vport created is actually a physical port, with VPI 0) or the port
10988  * login to Name Server for State Change Request (SCR) will be performed
10989  * on virtual port (real virtual port, with VPI greater than 0).
10990  **/
10991 static void
10992 lpfc_cmpl_reg_new_vport(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
10993 {
10994         struct lpfc_vport *vport = pmb->vport;
10995         struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
10996         struct lpfc_nodelist *ndlp = pmb->ctx_ndlp;
10997         MAILBOX_t *mb = &pmb->u.mb;
10998         int rc;
10999
11000         spin_lock_irq(shost->host_lock);
11001         vport->fc_flag &= ~FC_VPORT_NEEDS_REG_VPI;
11002         spin_unlock_irq(shost->host_lock);
11003
11004         if (mb->mbxStatus) {
11005                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
11006                                 "0915 Register VPI failed : Status: x%x"
11007                                 " upd bit: x%x \n", mb->mbxStatus,
11008                                  mb->un.varRegVpi.upd);
11009                 if (phba->sli_rev == LPFC_SLI_REV4 &&
11010                         mb->un.varRegVpi.upd)
11011                         goto mbox_err_exit ;
11012
11013                 switch (mb->mbxStatus) {
11014                 case 0x11:      /* unsupported feature */
11015                 case 0x9603:    /* max_vpi exceeded */
11016                 case 0x9602:    /* Link event since CLEAR_LA */
11017                         /* giving up on vport registration */
11018                         lpfc_vport_set_state(vport, FC_VPORT_FAILED);
11019                         spin_lock_irq(shost->host_lock);
11020                         vport->fc_flag &= ~(FC_FABRIC | FC_PUBLIC_LOOP);
11021                         spin_unlock_irq(shost->host_lock);
11022                         lpfc_can_disctmo(vport);
11023                         break;
11024                 /* If reg_vpi fail with invalid VPI status, re-init VPI */
11025                 case 0x20:
11026                         spin_lock_irq(shost->host_lock);
11027                         vport->fc_flag |= FC_VPORT_NEEDS_REG_VPI;
11028                         spin_unlock_irq(shost->host_lock);
11029                         lpfc_init_vpi(phba, pmb, vport->vpi);
11030                         pmb->vport = vport;
11031                         pmb->mbox_cmpl = lpfc_init_vpi_cmpl;
11032                         rc = lpfc_sli_issue_mbox(phba, pmb,
11033                                 MBX_NOWAIT);
11034                         if (rc == MBX_NOT_FINISHED) {
11035                                 lpfc_printf_vlog(vport, KERN_ERR,
11036                                                  LOG_TRACE_EVENT,
11037                                         "2732 Failed to issue INIT_VPI"
11038                                         " mailbox command\n");
11039                         } else {
11040                                 lpfc_nlp_put(ndlp);
11041                                 return;
11042                         }
11043                         fallthrough;
11044                 default:
11045                         /* Try to recover from this error */
11046                         if (phba->sli_rev == LPFC_SLI_REV4)
11047                                 lpfc_sli4_unreg_all_rpis(vport);
11048                         lpfc_mbx_unreg_vpi(vport);
11049                         spin_lock_irq(shost->host_lock);
11050                         vport->fc_flag |= FC_VPORT_NEEDS_REG_VPI;
11051                         spin_unlock_irq(shost->host_lock);
11052                         if (mb->mbxStatus == MBX_NOT_FINISHED)
11053                                 break;
11054                         if ((vport->port_type == LPFC_PHYSICAL_PORT) &&
11055                             !(vport->fc_flag & FC_LOGO_RCVD_DID_CHNG)) {
11056                                 if (phba->sli_rev == LPFC_SLI_REV4)
11057                                         lpfc_issue_init_vfi(vport);
11058                                 else
11059                                         lpfc_initial_flogi(vport);
11060                         } else {
11061                                 lpfc_initial_fdisc(vport);
11062                         }
11063                         break;
11064                 }
11065         } else {
11066                 spin_lock_irq(shost->host_lock);
11067                 vport->vpi_state |= LPFC_VPI_REGISTERED;
11068                 spin_unlock_irq(shost->host_lock);
11069                 if (vport == phba->pport) {
11070                         if (phba->sli_rev < LPFC_SLI_REV4)
11071                                 lpfc_issue_fabric_reglogin(vport);
11072                         else {
11073                                 /*
11074                                  * If the physical port is instantiated using
11075                                  * FDISC, do not start vport discovery.
11076                                  */
11077                                 if (vport->port_state != LPFC_FDISC)
11078                                         lpfc_start_fdiscs(phba);
11079                                 lpfc_do_scr_ns_plogi(phba, vport);
11080                         }
11081                 } else {
11082                         lpfc_do_scr_ns_plogi(phba, vport);
11083                 }
11084         }
11085 mbox_err_exit:
11086         /* Now, we decrement the ndlp reference count held for this
11087          * callback function
11088          */
11089         lpfc_nlp_put(ndlp);
11090
11091         mempool_free(pmb, phba->mbox_mem_pool);
11092         return;
11093 }
11094
11095 /**
11096  * lpfc_register_new_vport - Register a new vport with a HBA
11097  * @phba: pointer to lpfc hba data structure.
11098  * @vport: pointer to a host virtual N_Port data structure.
11099  * @ndlp: pointer to a node-list data structure.
11100  *
11101  * This routine registers the @vport as a new virtual port with a HBA.
11102  * It is done through a registering vpi mailbox command.
11103  **/
11104 void
11105 lpfc_register_new_vport(struct lpfc_hba *phba, struct lpfc_vport *vport,
11106                         struct lpfc_nodelist *ndlp)
11107 {
11108         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
11109         LPFC_MBOXQ_t *mbox;
11110
11111         mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
11112         if (mbox) {
11113                 lpfc_reg_vpi(vport, mbox);
11114                 mbox->vport = vport;
11115                 mbox->ctx_ndlp = lpfc_nlp_get(ndlp);
11116                 if (!mbox->ctx_ndlp) {
11117                         mempool_free(mbox, phba->mbox_mem_pool);
11118                         goto mbox_err_exit;
11119                 }
11120
11121                 mbox->mbox_cmpl = lpfc_cmpl_reg_new_vport;
11122                 if (lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT)
11123                     == MBX_NOT_FINISHED) {
11124                         /* mailbox command not success, decrement ndlp
11125                          * reference count for this command
11126                          */
11127                         lpfc_nlp_put(ndlp);
11128                         mempool_free(mbox, phba->mbox_mem_pool);
11129
11130                         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
11131                                 "0253 Register VPI: Can't send mbox\n");
11132                         goto mbox_err_exit;
11133                 }
11134         } else {
11135                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
11136                                  "0254 Register VPI: no memory\n");
11137                 goto mbox_err_exit;
11138         }
11139         return;
11140
11141 mbox_err_exit:
11142         lpfc_vport_set_state(vport, FC_VPORT_FAILED);
11143         spin_lock_irq(shost->host_lock);
11144         vport->fc_flag &= ~FC_VPORT_NEEDS_REG_VPI;
11145         spin_unlock_irq(shost->host_lock);
11146         return;
11147 }
11148
11149 /**
11150  * lpfc_cancel_all_vport_retry_delay_timer - Cancel all vport retry delay timer
11151  * @phba: pointer to lpfc hba data structure.
11152  *
11153  * This routine cancels the retry delay timers to all the vports.
11154  **/
11155 void
11156 lpfc_cancel_all_vport_retry_delay_timer(struct lpfc_hba *phba)
11157 {
11158         struct lpfc_vport **vports;
11159         struct lpfc_nodelist *ndlp;
11160         uint32_t link_state;
11161         int i;
11162
11163         /* Treat this failure as linkdown for all vports */
11164         link_state = phba->link_state;
11165         lpfc_linkdown(phba);
11166         phba->link_state = link_state;
11167
11168         vports = lpfc_create_vport_work_array(phba);
11169
11170         if (vports) {
11171                 for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
11172                         ndlp = lpfc_findnode_did(vports[i], Fabric_DID);
11173                         if (ndlp)
11174                                 lpfc_cancel_retry_delay_tmo(vports[i], ndlp);
11175                         lpfc_els_flush_cmd(vports[i]);
11176                 }
11177                 lpfc_destroy_vport_work_array(phba, vports);
11178         }
11179 }
11180
11181 /**
11182  * lpfc_retry_pport_discovery - Start timer to retry FLOGI.
11183  * @phba: pointer to lpfc hba data structure.
11184  *
11185  * This routine abort all pending discovery commands and
11186  * start a timer to retry FLOGI for the physical port
11187  * discovery.
11188  **/
11189 void
11190 lpfc_retry_pport_discovery(struct lpfc_hba *phba)
11191 {
11192         struct lpfc_nodelist *ndlp;
11193
11194         /* Cancel the all vports retry delay retry timers */
11195         lpfc_cancel_all_vport_retry_delay_timer(phba);
11196
11197         /* If fabric require FLOGI, then re-instantiate physical login */
11198         ndlp = lpfc_findnode_did(phba->pport, Fabric_DID);
11199         if (!ndlp)
11200                 return;
11201
11202         mod_timer(&ndlp->nlp_delayfunc, jiffies + msecs_to_jiffies(1000));
11203         spin_lock_irq(&ndlp->lock);
11204         ndlp->nlp_flag |= NLP_DELAY_TMO;
11205         spin_unlock_irq(&ndlp->lock);
11206         ndlp->nlp_last_elscmd = ELS_CMD_FLOGI;
11207         phba->pport->port_state = LPFC_FLOGI;
11208         return;
11209 }
11210
11211 /**
11212  * lpfc_fabric_login_reqd - Check if FLOGI required.
11213  * @phba: pointer to lpfc hba data structure.
11214  * @cmdiocb: pointer to FDISC command iocb.
11215  * @rspiocb: pointer to FDISC response iocb.
11216  *
11217  * This routine checks if a FLOGI is reguired for FDISC
11218  * to succeed.
11219  **/
11220 static int
11221 lpfc_fabric_login_reqd(struct lpfc_hba *phba,
11222                 struct lpfc_iocbq *cmdiocb,
11223                 struct lpfc_iocbq *rspiocb)
11224 {
11225         u32 ulp_status = get_job_ulpstatus(phba, rspiocb);
11226         u32 ulp_word4 = get_job_word4(phba, rspiocb);
11227
11228         if (ulp_status != IOSTAT_FABRIC_RJT ||
11229             ulp_word4 != RJT_LOGIN_REQUIRED)
11230                 return 0;
11231         else
11232                 return 1;
11233 }
11234
11235 /**
11236  * lpfc_cmpl_els_fdisc - Completion function for fdisc iocb command
11237  * @phba: pointer to lpfc hba data structure.
11238  * @cmdiocb: pointer to lpfc command iocb data structure.
11239  * @rspiocb: pointer to lpfc response iocb data structure.
11240  *
11241  * This routine is the completion callback function to a Fabric Discover
11242  * (FDISC) ELS command. Since all the FDISC ELS commands are issued
11243  * single threaded, each FDISC completion callback function will reset
11244  * the discovery timer for all vports such that the timers will not get
11245  * unnecessary timeout. The function checks the FDISC IOCB status. If error
11246  * detected, the vport will be set to FC_VPORT_FAILED state. Otherwise,the
11247  * vport will set to FC_VPORT_ACTIVE state. It then checks whether the DID
11248  * assigned to the vport has been changed with the completion of the FDISC
11249  * command. If so, both RPI (Remote Port Index) and VPI (Virtual Port Index)
11250  * are unregistered from the HBA, and then the lpfc_register_new_vport()
11251  * routine is invoked to register new vport with the HBA. Otherwise, the
11252  * lpfc_do_scr_ns_plogi() routine is invoked to issue a PLOGI to the Name
11253  * Server for State Change Request (SCR).
11254  **/
11255 static void
11256 lpfc_cmpl_els_fdisc(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
11257                     struct lpfc_iocbq *rspiocb)
11258 {
11259         struct lpfc_vport *vport = cmdiocb->vport;
11260         struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
11261         struct lpfc_nodelist *ndlp = cmdiocb->ndlp;
11262         struct lpfc_nodelist *np;
11263         struct lpfc_nodelist *next_np;
11264         struct lpfc_iocbq *piocb;
11265         struct lpfc_dmabuf *pcmd = cmdiocb->cmd_dmabuf, *prsp;
11266         struct serv_parm *sp;
11267         uint8_t fabric_param_changed;
11268         u32 ulp_status, ulp_word4;
11269
11270         ulp_status = get_job_ulpstatus(phba, rspiocb);
11271         ulp_word4 = get_job_word4(phba, rspiocb);
11272
11273         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
11274                          "0123 FDISC completes. x%x/x%x prevDID: x%x\n",
11275                          ulp_status, ulp_word4,
11276                          vport->fc_prevDID);
11277         /* Since all FDISCs are being single threaded, we
11278          * must reset the discovery timer for ALL vports
11279          * waiting to send FDISC when one completes.
11280          */
11281         list_for_each_entry(piocb, &phba->fabric_iocb_list, list) {
11282                 lpfc_set_disctmo(piocb->vport);
11283         }
11284
11285         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
11286                 "FDISC cmpl:      status:x%x/x%x prevdid:x%x",
11287                 ulp_status, ulp_word4, vport->fc_prevDID);
11288
11289         if (ulp_status) {
11290
11291                 if (lpfc_fabric_login_reqd(phba, cmdiocb, rspiocb)) {
11292                         lpfc_retry_pport_discovery(phba);
11293                         goto out;
11294                 }
11295
11296                 /* Check for retry */
11297                 if (lpfc_els_retry(phba, cmdiocb, rspiocb))
11298                         goto out;
11299                 /* FDISC failed */
11300                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
11301                                  "0126 FDISC failed. (x%x/x%x)\n",
11302                                  ulp_status, ulp_word4);
11303                 goto fdisc_failed;
11304         }
11305
11306         lpfc_check_nlp_post_devloss(vport, ndlp);
11307
11308         spin_lock_irq(shost->host_lock);
11309         vport->fc_flag &= ~FC_VPORT_CVL_RCVD;
11310         vport->fc_flag &= ~FC_VPORT_LOGO_RCVD;
11311         vport->fc_flag |= FC_FABRIC;
11312         if (vport->phba->fc_topology == LPFC_TOPOLOGY_LOOP)
11313                 vport->fc_flag |=  FC_PUBLIC_LOOP;
11314         spin_unlock_irq(shost->host_lock);
11315
11316         vport->fc_myDID = ulp_word4 & Mask_DID;
11317         lpfc_vport_set_state(vport, FC_VPORT_ACTIVE);
11318         prsp = list_get_first(&pcmd->list, struct lpfc_dmabuf, list);
11319         if (!prsp)
11320                 goto out;
11321         sp = prsp->virt + sizeof(uint32_t);
11322         fabric_param_changed = lpfc_check_clean_addr_bit(vport, sp);
11323         memcpy(&vport->fabric_portname, &sp->portName,
11324                 sizeof(struct lpfc_name));
11325         memcpy(&vport->fabric_nodename, &sp->nodeName,
11326                 sizeof(struct lpfc_name));
11327         if (fabric_param_changed &&
11328                 !(vport->fc_flag & FC_VPORT_NEEDS_REG_VPI)) {
11329                 /* If our NportID changed, we need to ensure all
11330                  * remaining NPORTs get unreg_login'ed so we can
11331                  * issue unreg_vpi.
11332                  */
11333                 list_for_each_entry_safe(np, next_np,
11334                         &vport->fc_nodes, nlp_listp) {
11335                         if ((np->nlp_state != NLP_STE_NPR_NODE) ||
11336                             !(np->nlp_flag & NLP_NPR_ADISC))
11337                                 continue;
11338                         spin_lock_irq(&ndlp->lock);
11339                         np->nlp_flag &= ~NLP_NPR_ADISC;
11340                         spin_unlock_irq(&ndlp->lock);
11341                         lpfc_unreg_rpi(vport, np);
11342                 }
11343                 lpfc_cleanup_pending_mbox(vport);
11344
11345                 if (phba->sli_rev == LPFC_SLI_REV4)
11346                         lpfc_sli4_unreg_all_rpis(vport);
11347
11348                 lpfc_mbx_unreg_vpi(vport);
11349                 spin_lock_irq(shost->host_lock);
11350                 vport->fc_flag |= FC_VPORT_NEEDS_REG_VPI;
11351                 if (phba->sli_rev == LPFC_SLI_REV4)
11352                         vport->fc_flag |= FC_VPORT_NEEDS_INIT_VPI;
11353                 else
11354                         vport->fc_flag |= FC_LOGO_RCVD_DID_CHNG;
11355                 spin_unlock_irq(shost->host_lock);
11356         } else if ((phba->sli_rev == LPFC_SLI_REV4) &&
11357                 !(vport->fc_flag & FC_VPORT_NEEDS_REG_VPI)) {
11358                 /*
11359                  * Driver needs to re-reg VPI in order for f/w
11360                  * to update the MAC address.
11361                  */
11362                 lpfc_register_new_vport(phba, vport, ndlp);
11363                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
11364                 goto out;
11365         }
11366
11367         if (vport->fc_flag & FC_VPORT_NEEDS_INIT_VPI)
11368                 lpfc_issue_init_vpi(vport);
11369         else if (vport->fc_flag & FC_VPORT_NEEDS_REG_VPI)
11370                 lpfc_register_new_vport(phba, vport, ndlp);
11371         else
11372                 lpfc_do_scr_ns_plogi(phba, vport);
11373
11374         /* The FDISC completed successfully. Move the fabric ndlp to
11375          * UNMAPPED state and register with the transport.
11376          */
11377         lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
11378         goto out;
11379
11380 fdisc_failed:
11381         if (vport->fc_vport &&
11382             (vport->fc_vport->vport_state != FC_VPORT_NO_FABRIC_RSCS))
11383                 lpfc_vport_set_state(vport, FC_VPORT_FAILED);
11384         /* Cancel discovery timer */
11385         lpfc_can_disctmo(vport);
11386 out:
11387         lpfc_els_free_iocb(phba, cmdiocb);
11388         lpfc_nlp_put(ndlp);
11389 }
11390
11391 /**
11392  * lpfc_issue_els_fdisc - Issue a fdisc iocb command
11393  * @vport: pointer to a virtual N_Port data structure.
11394  * @ndlp: pointer to a node-list data structure.
11395  * @retry: number of retries to the command IOCB.
11396  *
11397  * This routine prepares and issues a Fabric Discover (FDISC) IOCB to
11398  * a remote node (@ndlp) off a @vport. It uses the lpfc_issue_fabric_iocb()
11399  * routine to issue the IOCB, which makes sure only one outstanding fabric
11400  * IOCB will be sent off HBA at any given time.
11401  *
11402  * Note that the ndlp reference count will be incremented by 1 for holding the
11403  * ndlp and the reference to ndlp will be stored into the ndlp field of
11404  * the IOCB for the completion callback function to the FDISC ELS command.
11405  *
11406  * Return code
11407  *   0 - Successfully issued fdisc iocb command
11408  *   1 - Failed to issue fdisc iocb command
11409  **/
11410 static int
11411 lpfc_issue_els_fdisc(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
11412                      uint8_t retry)
11413 {
11414         struct lpfc_hba *phba = vport->phba;
11415         IOCB_t *icmd;
11416         union lpfc_wqe128 *wqe = NULL;
11417         struct lpfc_iocbq *elsiocb;
11418         struct serv_parm *sp;
11419         uint8_t *pcmd;
11420         uint16_t cmdsize;
11421         int did = ndlp->nlp_DID;
11422         int rc;
11423
11424         vport->port_state = LPFC_FDISC;
11425         vport->fc_myDID = 0;
11426         cmdsize = (sizeof(uint32_t) + sizeof(struct serv_parm));
11427         elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, retry, ndlp, did,
11428                                      ELS_CMD_FDISC);
11429         if (!elsiocb) {
11430                 lpfc_vport_set_state(vport, FC_VPORT_FAILED);
11431                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
11432                                  "0255 Issue FDISC: no IOCB\n");
11433                 return 1;
11434         }
11435
11436         if (phba->sli_rev == LPFC_SLI_REV4) {
11437                 wqe = &elsiocb->wqe;
11438                 bf_set(els_req64_sid, &wqe->els_req, 0);
11439                 bf_set(els_req64_sp, &wqe->els_req, 1);
11440         } else {
11441                 icmd = &elsiocb->iocb;
11442                 icmd->un.elsreq64.myID = 0;
11443                 icmd->un.elsreq64.fl = 1;
11444                 icmd->ulpCt_h = 1;
11445                 icmd->ulpCt_l = 0;
11446         }
11447
11448         pcmd = (uint8_t *)elsiocb->cmd_dmabuf->virt;
11449         *((uint32_t *) (pcmd)) = ELS_CMD_FDISC;
11450         pcmd += sizeof(uint32_t); /* CSP Word 1 */
11451         memcpy(pcmd, &vport->phba->pport->fc_sparam, sizeof(struct serv_parm));
11452         sp = (struct serv_parm *) pcmd;
11453         /* Setup CSPs accordingly for Fabric */
11454         sp->cmn.e_d_tov = 0;
11455         sp->cmn.w2.r_a_tov = 0;
11456         sp->cmn.virtual_fabric_support = 0;
11457         sp->cls1.classValid = 0;
11458         sp->cls2.seqDelivery = 1;
11459         sp->cls3.seqDelivery = 1;
11460
11461         pcmd += sizeof(uint32_t); /* CSP Word 2 */
11462         pcmd += sizeof(uint32_t); /* CSP Word 3 */
11463         pcmd += sizeof(uint32_t); /* CSP Word 4 */
11464         pcmd += sizeof(uint32_t); /* Port Name */
11465         memcpy(pcmd, &vport->fc_portname, 8);
11466         pcmd += sizeof(uint32_t); /* Node Name */
11467         pcmd += sizeof(uint32_t); /* Node Name */
11468         memcpy(pcmd, &vport->fc_nodename, 8);
11469         sp->cmn.valid_vendor_ver_level = 0;
11470         memset(sp->un.vendorVersion, 0, sizeof(sp->un.vendorVersion));
11471         lpfc_set_disctmo(vport);
11472
11473         phba->fc_stat.elsXmitFDISC++;
11474         elsiocb->cmd_cmpl = lpfc_cmpl_els_fdisc;
11475
11476         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
11477                 "Issue FDISC:     did:x%x",
11478                 did, 0, 0);
11479
11480         elsiocb->ndlp = lpfc_nlp_get(ndlp);
11481         if (!elsiocb->ndlp)
11482                 goto err_out;
11483
11484         rc = lpfc_issue_fabric_iocb(phba, elsiocb);
11485         if (rc == IOCB_ERROR) {
11486                 lpfc_nlp_put(ndlp);
11487                 goto err_out;
11488         }
11489
11490         lpfc_vport_set_state(vport, FC_VPORT_INITIALIZING);
11491         return 0;
11492
11493  err_out:
11494         lpfc_els_free_iocb(phba, elsiocb);
11495         lpfc_vport_set_state(vport, FC_VPORT_FAILED);
11496         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
11497                          "0256 Issue FDISC: Cannot send IOCB\n");
11498         return 1;
11499 }
11500
11501 /**
11502  * lpfc_cmpl_els_npiv_logo - Completion function with vport logo
11503  * @phba: pointer to lpfc hba data structure.
11504  * @cmdiocb: pointer to lpfc command iocb data structure.
11505  * @rspiocb: pointer to lpfc response iocb data structure.
11506  *
11507  * This routine is the completion callback function to the issuing of a LOGO
11508  * ELS command off a vport. It frees the command IOCB and then decrement the
11509  * reference count held on ndlp for this completion function, indicating that
11510  * the reference to the ndlp is no long needed. Note that the
11511  * lpfc_els_free_iocb() routine decrements the ndlp reference held for this
11512  * callback function and an additional explicit ndlp reference decrementation
11513  * will trigger the actual release of the ndlp.
11514  **/
11515 static void
11516 lpfc_cmpl_els_npiv_logo(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
11517                         struct lpfc_iocbq *rspiocb)
11518 {
11519         struct lpfc_vport *vport = cmdiocb->vport;
11520         IOCB_t *irsp;
11521         struct lpfc_nodelist *ndlp;
11522         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
11523         u32 ulp_status, ulp_word4, did, tmo;
11524
11525         ndlp = cmdiocb->ndlp;
11526
11527         ulp_status = get_job_ulpstatus(phba, rspiocb);
11528         ulp_word4 = get_job_word4(phba, rspiocb);
11529
11530         if (phba->sli_rev == LPFC_SLI_REV4) {
11531                 did = get_job_els_rsp64_did(phba, cmdiocb);
11532                 tmo = get_wqe_tmo(cmdiocb);
11533         } else {
11534                 irsp = &rspiocb->iocb;
11535                 did = get_job_els_rsp64_did(phba, rspiocb);
11536                 tmo = irsp->ulpTimeout;
11537         }
11538
11539         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
11540                 "LOGO npiv cmpl:  status:x%x/x%x did:x%x",
11541                 ulp_status, ulp_word4, did);
11542
11543         /* NPIV LOGO completes to NPort <nlp_DID> */
11544         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
11545                          "2928 NPIV LOGO completes to NPort x%x "
11546                          "Data: x%x x%x x%x x%x x%x x%x x%x\n",
11547                          ndlp->nlp_DID, ulp_status, ulp_word4,
11548                          tmo, vport->num_disc_nodes,
11549                          kref_read(&ndlp->kref), ndlp->nlp_flag,
11550                          ndlp->fc4_xpt_flags);
11551
11552         if (ulp_status == IOSTAT_SUCCESS) {
11553                 spin_lock_irq(shost->host_lock);
11554                 vport->fc_flag &= ~FC_NDISC_ACTIVE;
11555                 vport->fc_flag &= ~FC_FABRIC;
11556                 spin_unlock_irq(shost->host_lock);
11557                 lpfc_can_disctmo(vport);
11558         }
11559
11560         if (ndlp->save_flags & NLP_WAIT_FOR_LOGO) {
11561                 /* Wake up lpfc_vport_delete if waiting...*/
11562                 if (ndlp->logo_waitq)
11563                         wake_up(ndlp->logo_waitq);
11564                 spin_lock_irq(&ndlp->lock);
11565                 ndlp->nlp_flag &= ~(NLP_ISSUE_LOGO | NLP_LOGO_SND);
11566                 ndlp->save_flags &= ~NLP_WAIT_FOR_LOGO;
11567                 spin_unlock_irq(&ndlp->lock);
11568         }
11569
11570         /* Safe to release resources now. */
11571         lpfc_els_free_iocb(phba, cmdiocb);
11572         lpfc_nlp_put(ndlp);
11573 }
11574
11575 /**
11576  * lpfc_issue_els_npiv_logo - Issue a logo off a vport
11577  * @vport: pointer to a virtual N_Port data structure.
11578  * @ndlp: pointer to a node-list data structure.
11579  *
11580  * This routine issues a LOGO ELS command to an @ndlp off a @vport.
11581  *
11582  * Note that the ndlp reference count will be incremented by 1 for holding the
11583  * ndlp and the reference to ndlp will be stored into the ndlp field of
11584  * the IOCB for the completion callback function to the LOGO ELS command.
11585  *
11586  * Return codes
11587  *   0 - Successfully issued logo off the @vport
11588  *   1 - Failed to issue logo off the @vport
11589  **/
11590 int
11591 lpfc_issue_els_npiv_logo(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
11592 {
11593         int rc = 0;
11594         struct lpfc_hba  *phba = vport->phba;
11595         struct lpfc_iocbq *elsiocb;
11596         uint8_t *pcmd;
11597         uint16_t cmdsize;
11598
11599         cmdsize = 2 * sizeof(uint32_t) + sizeof(struct lpfc_name);
11600         elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, 0, ndlp, ndlp->nlp_DID,
11601                                      ELS_CMD_LOGO);
11602         if (!elsiocb)
11603                 return 1;
11604
11605         pcmd = (uint8_t *)elsiocb->cmd_dmabuf->virt;
11606         *((uint32_t *) (pcmd)) = ELS_CMD_LOGO;
11607         pcmd += sizeof(uint32_t);
11608
11609         /* Fill in LOGO payload */
11610         *((uint32_t *) (pcmd)) = be32_to_cpu(vport->fc_myDID);
11611         pcmd += sizeof(uint32_t);
11612         memcpy(pcmd, &vport->fc_portname, sizeof(struct lpfc_name));
11613
11614         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
11615                 "Issue LOGO npiv  did:x%x flg:x%x",
11616                 ndlp->nlp_DID, ndlp->nlp_flag, 0);
11617
11618         elsiocb->cmd_cmpl = lpfc_cmpl_els_npiv_logo;
11619         spin_lock_irq(&ndlp->lock);
11620         ndlp->nlp_flag |= NLP_LOGO_SND;
11621         spin_unlock_irq(&ndlp->lock);
11622         elsiocb->ndlp = lpfc_nlp_get(ndlp);
11623         if (!elsiocb->ndlp) {
11624                 lpfc_els_free_iocb(phba, elsiocb);
11625                 goto err;
11626         }
11627
11628         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
11629         if (rc == IOCB_ERROR) {
11630                 lpfc_els_free_iocb(phba, elsiocb);
11631                 lpfc_nlp_put(ndlp);
11632                 goto err;
11633         }
11634         return 0;
11635
11636 err:
11637         spin_lock_irq(&ndlp->lock);
11638         ndlp->nlp_flag &= ~NLP_LOGO_SND;
11639         spin_unlock_irq(&ndlp->lock);
11640         return 1;
11641 }
11642
11643 /**
11644  * lpfc_fabric_block_timeout - Handler function to the fabric block timer
11645  * @t: timer context used to obtain the lpfc hba.
11646  *
11647  * This routine is invoked by the fabric iocb block timer after
11648  * timeout. It posts the fabric iocb block timeout event by setting the
11649  * WORKER_FABRIC_BLOCK_TMO bit to work port event bitmap and then invokes
11650  * lpfc_worker_wake_up() routine to wake up the worker thread. It is for
11651  * the worker thread to invoke the lpfc_unblock_fabric_iocbs() on the
11652  * posted event WORKER_FABRIC_BLOCK_TMO.
11653  **/
11654 void
11655 lpfc_fabric_block_timeout(struct timer_list *t)
11656 {
11657         struct lpfc_hba  *phba = from_timer(phba, t, fabric_block_timer);
11658         unsigned long iflags;
11659         uint32_t tmo_posted;
11660
11661         spin_lock_irqsave(&phba->pport->work_port_lock, iflags);
11662         tmo_posted = phba->pport->work_port_events & WORKER_FABRIC_BLOCK_TMO;
11663         if (!tmo_posted)
11664                 phba->pport->work_port_events |= WORKER_FABRIC_BLOCK_TMO;
11665         spin_unlock_irqrestore(&phba->pport->work_port_lock, iflags);
11666
11667         if (!tmo_posted)
11668                 lpfc_worker_wake_up(phba);
11669         return;
11670 }
11671
11672 /**
11673  * lpfc_resume_fabric_iocbs - Issue a fabric iocb from driver internal list
11674  * @phba: pointer to lpfc hba data structure.
11675  *
11676  * This routine issues one fabric iocb from the driver internal list to
11677  * the HBA. It first checks whether it's ready to issue one fabric iocb to
11678  * the HBA (whether there is no outstanding fabric iocb). If so, it shall
11679  * remove one pending fabric iocb from the driver internal list and invokes
11680  * lpfc_sli_issue_iocb() routine to send the fabric iocb to the HBA.
11681  **/
11682 static void
11683 lpfc_resume_fabric_iocbs(struct lpfc_hba *phba)
11684 {
11685         struct lpfc_iocbq *iocb;
11686         unsigned long iflags;
11687         int ret;
11688
11689 repeat:
11690         iocb = NULL;
11691         spin_lock_irqsave(&phba->hbalock, iflags);
11692         /* Post any pending iocb to the SLI layer */
11693         if (atomic_read(&phba->fabric_iocb_count) == 0) {
11694                 list_remove_head(&phba->fabric_iocb_list, iocb, typeof(*iocb),
11695                                  list);
11696                 if (iocb)
11697                         /* Increment fabric iocb count to hold the position */
11698                         atomic_inc(&phba->fabric_iocb_count);
11699         }
11700         spin_unlock_irqrestore(&phba->hbalock, iflags);
11701         if (iocb) {
11702                 iocb->fabric_cmd_cmpl = iocb->cmd_cmpl;
11703                 iocb->cmd_cmpl = lpfc_cmpl_fabric_iocb;
11704                 iocb->cmd_flag |= LPFC_IO_FABRIC;
11705
11706                 lpfc_debugfs_disc_trc(iocb->vport, LPFC_DISC_TRC_ELS_CMD,
11707                                       "Fabric sched1:   ste:x%x",
11708                                       iocb->vport->port_state, 0, 0);
11709
11710                 ret = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, iocb, 0);
11711
11712                 if (ret == IOCB_ERROR) {
11713                         iocb->cmd_cmpl = iocb->fabric_cmd_cmpl;
11714                         iocb->fabric_cmd_cmpl = NULL;
11715                         iocb->cmd_flag &= ~LPFC_IO_FABRIC;
11716                         set_job_ulpstatus(iocb, IOSTAT_LOCAL_REJECT);
11717                         iocb->wcqe_cmpl.parameter = IOERR_SLI_ABORTED;
11718                         iocb->cmd_cmpl(phba, iocb, iocb);
11719
11720                         atomic_dec(&phba->fabric_iocb_count);
11721                         goto repeat;
11722                 }
11723         }
11724 }
11725
11726 /**
11727  * lpfc_unblock_fabric_iocbs - Unblock issuing fabric iocb command
11728  * @phba: pointer to lpfc hba data structure.
11729  *
11730  * This routine unblocks the  issuing fabric iocb command. The function
11731  * will clear the fabric iocb block bit and then invoke the routine
11732  * lpfc_resume_fabric_iocbs() to issue one of the pending fabric iocb
11733  * from the driver internal fabric iocb list.
11734  **/
11735 void
11736 lpfc_unblock_fabric_iocbs(struct lpfc_hba *phba)
11737 {
11738         clear_bit(FABRIC_COMANDS_BLOCKED, &phba->bit_flags);
11739
11740         lpfc_resume_fabric_iocbs(phba);
11741         return;
11742 }
11743
11744 /**
11745  * lpfc_block_fabric_iocbs - Block issuing fabric iocb command
11746  * @phba: pointer to lpfc hba data structure.
11747  *
11748  * This routine blocks the issuing fabric iocb for a specified amount of
11749  * time (currently 100 ms). This is done by set the fabric iocb block bit
11750  * and set up a timeout timer for 100ms. When the block bit is set, no more
11751  * fabric iocb will be issued out of the HBA.
11752  **/
11753 static void
11754 lpfc_block_fabric_iocbs(struct lpfc_hba *phba)
11755 {
11756         int blocked;
11757
11758         blocked = test_and_set_bit(FABRIC_COMANDS_BLOCKED, &phba->bit_flags);
11759         /* Start a timer to unblock fabric iocbs after 100ms */
11760         if (!blocked)
11761                 mod_timer(&phba->fabric_block_timer,
11762                           jiffies + msecs_to_jiffies(100));
11763
11764         return;
11765 }
11766
11767 /**
11768  * lpfc_cmpl_fabric_iocb - Completion callback function for fabric iocb
11769  * @phba: pointer to lpfc hba data structure.
11770  * @cmdiocb: pointer to lpfc command iocb data structure.
11771  * @rspiocb: pointer to lpfc response iocb data structure.
11772  *
11773  * This routine is the callback function that is put to the fabric iocb's
11774  * callback function pointer (iocb->cmd_cmpl). The original iocb's callback
11775  * function pointer has been stored in iocb->fabric_cmd_cmpl. This callback
11776  * function first restores and invokes the original iocb's callback function
11777  * and then invokes the lpfc_resume_fabric_iocbs() routine to issue the next
11778  * fabric bound iocb from the driver internal fabric iocb list onto the wire.
11779  **/
11780 static void
11781 lpfc_cmpl_fabric_iocb(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
11782                       struct lpfc_iocbq *rspiocb)
11783 {
11784         struct ls_rjt stat;
11785         u32 ulp_status = get_job_ulpstatus(phba, rspiocb);
11786         u32 ulp_word4 = get_job_word4(phba, rspiocb);
11787
11788         WARN_ON((cmdiocb->cmd_flag & LPFC_IO_FABRIC) != LPFC_IO_FABRIC);
11789
11790         switch (ulp_status) {
11791                 case IOSTAT_NPORT_RJT:
11792                 case IOSTAT_FABRIC_RJT:
11793                         if (ulp_word4 & RJT_UNAVAIL_TEMP)
11794                                 lpfc_block_fabric_iocbs(phba);
11795                         break;
11796
11797                 case IOSTAT_NPORT_BSY:
11798                 case IOSTAT_FABRIC_BSY:
11799                         lpfc_block_fabric_iocbs(phba);
11800                         break;
11801
11802                 case IOSTAT_LS_RJT:
11803                         stat.un.ls_rjt_error_be =
11804                                 cpu_to_be32(ulp_word4);
11805                         if ((stat.un.b.lsRjtRsnCode == LSRJT_UNABLE_TPC) ||
11806                                 (stat.un.b.lsRjtRsnCode == LSRJT_LOGICAL_BSY))
11807                                 lpfc_block_fabric_iocbs(phba);
11808                         break;
11809         }
11810
11811         BUG_ON(atomic_read(&phba->fabric_iocb_count) == 0);
11812
11813         cmdiocb->cmd_cmpl = cmdiocb->fabric_cmd_cmpl;
11814         cmdiocb->fabric_cmd_cmpl = NULL;
11815         cmdiocb->cmd_flag &= ~LPFC_IO_FABRIC;
11816         cmdiocb->cmd_cmpl(phba, cmdiocb, rspiocb);
11817
11818         atomic_dec(&phba->fabric_iocb_count);
11819         if (!test_bit(FABRIC_COMANDS_BLOCKED, &phba->bit_flags)) {
11820                 /* Post any pending iocbs to HBA */
11821                 lpfc_resume_fabric_iocbs(phba);
11822         }
11823 }
11824
11825 /**
11826  * lpfc_issue_fabric_iocb - Issue a fabric iocb command
11827  * @phba: pointer to lpfc hba data structure.
11828  * @iocb: pointer to lpfc command iocb data structure.
11829  *
11830  * This routine is used as the top-level API for issuing a fabric iocb command
11831  * such as FLOGI and FDISC. To accommodate certain switch fabric, this driver
11832  * function makes sure that only one fabric bound iocb will be outstanding at
11833  * any given time. As such, this function will first check to see whether there
11834  * is already an outstanding fabric iocb on the wire. If so, it will put the
11835  * newly issued iocb onto the driver internal fabric iocb list, waiting to be
11836  * issued later. Otherwise, it will issue the iocb on the wire and update the
11837  * fabric iocb count it indicate that there is one fabric iocb on the wire.
11838  *
11839  * Note, this implementation has a potential sending out fabric IOCBs out of
11840  * order. The problem is caused by the construction of the "ready" boolen does
11841  * not include the condition that the internal fabric IOCB list is empty. As
11842  * such, it is possible a fabric IOCB issued by this routine might be "jump"
11843  * ahead of the fabric IOCBs in the internal list.
11844  *
11845  * Return code
11846  *   IOCB_SUCCESS - either fabric iocb put on the list or issued successfully
11847  *   IOCB_ERROR - failed to issue fabric iocb
11848  **/
11849 static int
11850 lpfc_issue_fabric_iocb(struct lpfc_hba *phba, struct lpfc_iocbq *iocb)
11851 {
11852         unsigned long iflags;
11853         int ready;
11854         int ret;
11855
11856         BUG_ON(atomic_read(&phba->fabric_iocb_count) > 1);
11857
11858         spin_lock_irqsave(&phba->hbalock, iflags);
11859         ready = atomic_read(&phba->fabric_iocb_count) == 0 &&
11860                 !test_bit(FABRIC_COMANDS_BLOCKED, &phba->bit_flags);
11861
11862         if (ready)
11863                 /* Increment fabric iocb count to hold the position */
11864                 atomic_inc(&phba->fabric_iocb_count);
11865         spin_unlock_irqrestore(&phba->hbalock, iflags);
11866         if (ready) {
11867                 iocb->fabric_cmd_cmpl = iocb->cmd_cmpl;
11868                 iocb->cmd_cmpl = lpfc_cmpl_fabric_iocb;
11869                 iocb->cmd_flag |= LPFC_IO_FABRIC;
11870
11871                 lpfc_debugfs_disc_trc(iocb->vport, LPFC_DISC_TRC_ELS_CMD,
11872                                       "Fabric sched2:   ste:x%x",
11873                                       iocb->vport->port_state, 0, 0);
11874
11875                 ret = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, iocb, 0);
11876
11877                 if (ret == IOCB_ERROR) {
11878                         iocb->cmd_cmpl = iocb->fabric_cmd_cmpl;
11879                         iocb->fabric_cmd_cmpl = NULL;
11880                         iocb->cmd_flag &= ~LPFC_IO_FABRIC;
11881                         atomic_dec(&phba->fabric_iocb_count);
11882                 }
11883         } else {
11884                 spin_lock_irqsave(&phba->hbalock, iflags);
11885                 list_add_tail(&iocb->list, &phba->fabric_iocb_list);
11886                 spin_unlock_irqrestore(&phba->hbalock, iflags);
11887                 ret = IOCB_SUCCESS;
11888         }
11889         return ret;
11890 }
11891
11892 /**
11893  * lpfc_fabric_abort_vport - Abort a vport's iocbs from driver fabric iocb list
11894  * @vport: pointer to a virtual N_Port data structure.
11895  *
11896  * This routine aborts all the IOCBs associated with a @vport from the
11897  * driver internal fabric IOCB list. The list contains fabric IOCBs to be
11898  * issued to the ELS IOCB ring. This abort function walks the fabric IOCB
11899  * list, removes each IOCB associated with the @vport off the list, set the
11900  * status field to IOSTAT_LOCAL_REJECT, and invokes the callback function
11901  * associated with the IOCB.
11902  **/
11903 static void lpfc_fabric_abort_vport(struct lpfc_vport *vport)
11904 {
11905         LIST_HEAD(completions);
11906         struct lpfc_hba  *phba = vport->phba;
11907         struct lpfc_iocbq *tmp_iocb, *piocb;
11908
11909         spin_lock_irq(&phba->hbalock);
11910         list_for_each_entry_safe(piocb, tmp_iocb, &phba->fabric_iocb_list,
11911                                  list) {
11912
11913                 if (piocb->vport != vport)
11914                         continue;
11915
11916                 list_move_tail(&piocb->list, &completions);
11917         }
11918         spin_unlock_irq(&phba->hbalock);
11919
11920         /* Cancel all the IOCBs from the completions list */
11921         lpfc_sli_cancel_iocbs(phba, &completions, IOSTAT_LOCAL_REJECT,
11922                               IOERR_SLI_ABORTED);
11923 }
11924
11925 /**
11926  * lpfc_fabric_abort_nport - Abort a ndlp's iocbs from driver fabric iocb list
11927  * @ndlp: pointer to a node-list data structure.
11928  *
11929  * This routine aborts all the IOCBs associated with an @ndlp from the
11930  * driver internal fabric IOCB list. The list contains fabric IOCBs to be
11931  * issued to the ELS IOCB ring. This abort function walks the fabric IOCB
11932  * list, removes each IOCB associated with the @ndlp off the list, set the
11933  * status field to IOSTAT_LOCAL_REJECT, and invokes the callback function
11934  * associated with the IOCB.
11935  **/
11936 void lpfc_fabric_abort_nport(struct lpfc_nodelist *ndlp)
11937 {
11938         LIST_HEAD(completions);
11939         struct lpfc_hba  *phba = ndlp->phba;
11940         struct lpfc_iocbq *tmp_iocb, *piocb;
11941         struct lpfc_sli_ring *pring;
11942
11943         pring = lpfc_phba_elsring(phba);
11944
11945         if (unlikely(!pring))
11946                 return;
11947
11948         spin_lock_irq(&phba->hbalock);
11949         list_for_each_entry_safe(piocb, tmp_iocb, &phba->fabric_iocb_list,
11950                                  list) {
11951                 if ((lpfc_check_sli_ndlp(phba, pring, piocb, ndlp))) {
11952
11953                         list_move_tail(&piocb->list, &completions);
11954                 }
11955         }
11956         spin_unlock_irq(&phba->hbalock);
11957
11958         /* Cancel all the IOCBs from the completions list */
11959         lpfc_sli_cancel_iocbs(phba, &completions, IOSTAT_LOCAL_REJECT,
11960                               IOERR_SLI_ABORTED);
11961 }
11962
11963 /**
11964  * lpfc_fabric_abort_hba - Abort all iocbs on driver fabric iocb list
11965  * @phba: pointer to lpfc hba data structure.
11966  *
11967  * This routine aborts all the IOCBs currently on the driver internal
11968  * fabric IOCB list. The list contains fabric IOCBs to be issued to the ELS
11969  * IOCB ring. This function takes the entire IOCB list off the fabric IOCB
11970  * list, removes IOCBs off the list, set the status field to
11971  * IOSTAT_LOCAL_REJECT, and invokes the callback function associated with
11972  * the IOCB.
11973  **/
11974 void lpfc_fabric_abort_hba(struct lpfc_hba *phba)
11975 {
11976         LIST_HEAD(completions);
11977
11978         spin_lock_irq(&phba->hbalock);
11979         list_splice_init(&phba->fabric_iocb_list, &completions);
11980         spin_unlock_irq(&phba->hbalock);
11981
11982         /* Cancel all the IOCBs from the completions list */
11983         lpfc_sli_cancel_iocbs(phba, &completions, IOSTAT_LOCAL_REJECT,
11984                               IOERR_SLI_ABORTED);
11985 }
11986
11987 /**
11988  * lpfc_sli4_vport_delete_els_xri_aborted -Remove all ndlp references for vport
11989  * @vport: pointer to lpfc vport data structure.
11990  *
11991  * This routine is invoked by the vport cleanup for deletions and the cleanup
11992  * for an ndlp on removal.
11993  **/
11994 void
11995 lpfc_sli4_vport_delete_els_xri_aborted(struct lpfc_vport *vport)
11996 {
11997         struct lpfc_hba *phba = vport->phba;
11998         struct lpfc_sglq *sglq_entry = NULL, *sglq_next = NULL;
11999         struct lpfc_nodelist *ndlp = NULL;
12000         unsigned long iflag = 0;
12001
12002         spin_lock_irqsave(&phba->sli4_hba.sgl_list_lock, iflag);
12003         list_for_each_entry_safe(sglq_entry, sglq_next,
12004                         &phba->sli4_hba.lpfc_abts_els_sgl_list, list) {
12005                 if (sglq_entry->ndlp && sglq_entry->ndlp->vport == vport) {
12006                         lpfc_nlp_put(sglq_entry->ndlp);
12007                         ndlp = sglq_entry->ndlp;
12008                         sglq_entry->ndlp = NULL;
12009
12010                         /* If the xri on the abts_els_sgl list is for the Fport
12011                          * node and the vport is unloading, the xri aborted wcqe
12012                          * likely isn't coming back.  Just release the sgl.
12013                          */
12014                         if ((vport->load_flag & FC_UNLOADING) &&
12015                             ndlp->nlp_DID == Fabric_DID) {
12016                                 list_del(&sglq_entry->list);
12017                                 sglq_entry->state = SGL_FREED;
12018                                 list_add_tail(&sglq_entry->list,
12019                                         &phba->sli4_hba.lpfc_els_sgl_list);
12020                         }
12021                 }
12022         }
12023         spin_unlock_irqrestore(&phba->sli4_hba.sgl_list_lock, iflag);
12024         return;
12025 }
12026
12027 /**
12028  * lpfc_sli4_els_xri_aborted - Slow-path process of els xri abort
12029  * @phba: pointer to lpfc hba data structure.
12030  * @axri: pointer to the els xri abort wcqe structure.
12031  *
12032  * This routine is invoked by the worker thread to process a SLI4 slow-path
12033  * ELS aborted xri.
12034  **/
12035 void
12036 lpfc_sli4_els_xri_aborted(struct lpfc_hba *phba,
12037                           struct sli4_wcqe_xri_aborted *axri)
12038 {
12039         uint16_t xri = bf_get(lpfc_wcqe_xa_xri, axri);
12040         uint16_t rxid = bf_get(lpfc_wcqe_xa_remote_xid, axri);
12041         uint16_t lxri = 0;
12042
12043         struct lpfc_sglq *sglq_entry = NULL, *sglq_next = NULL;
12044         unsigned long iflag = 0;
12045         struct lpfc_nodelist *ndlp;
12046         struct lpfc_sli_ring *pring;
12047
12048         pring = lpfc_phba_elsring(phba);
12049
12050         spin_lock_irqsave(&phba->sli4_hba.sgl_list_lock, iflag);
12051         list_for_each_entry_safe(sglq_entry, sglq_next,
12052                         &phba->sli4_hba.lpfc_abts_els_sgl_list, list) {
12053                 if (sglq_entry->sli4_xritag == xri) {
12054                         list_del(&sglq_entry->list);
12055                         ndlp = sglq_entry->ndlp;
12056                         sglq_entry->ndlp = NULL;
12057                         list_add_tail(&sglq_entry->list,
12058                                 &phba->sli4_hba.lpfc_els_sgl_list);
12059                         sglq_entry->state = SGL_FREED;
12060                         spin_unlock_irqrestore(&phba->sli4_hba.sgl_list_lock,
12061                                                iflag);
12062
12063                         if (ndlp) {
12064                                 lpfc_set_rrq_active(phba, ndlp,
12065                                         sglq_entry->sli4_lxritag,
12066                                         rxid, 1);
12067                                 lpfc_nlp_put(ndlp);
12068                         }
12069
12070                         /* Check if TXQ queue needs to be serviced */
12071                         if (pring && !list_empty(&pring->txq))
12072                                 lpfc_worker_wake_up(phba);
12073                         return;
12074                 }
12075         }
12076         spin_unlock_irqrestore(&phba->sli4_hba.sgl_list_lock, iflag);
12077         lxri = lpfc_sli4_xri_inrange(phba, xri);
12078         if (lxri == NO_XRI)
12079                 return;
12080
12081         spin_lock_irqsave(&phba->hbalock, iflag);
12082         sglq_entry = __lpfc_get_active_sglq(phba, lxri);
12083         if (!sglq_entry || (sglq_entry->sli4_xritag != xri)) {
12084                 spin_unlock_irqrestore(&phba->hbalock, iflag);
12085                 return;
12086         }
12087         sglq_entry->state = SGL_XRI_ABORTED;
12088         spin_unlock_irqrestore(&phba->hbalock, iflag);
12089         return;
12090 }
12091
12092 /* lpfc_sli_abts_recover_port - Recover a port that failed a BLS_ABORT req.
12093  * @vport: pointer to virtual port object.
12094  * @ndlp: nodelist pointer for the impacted node.
12095  *
12096  * The driver calls this routine in response to an SLI4 XRI ABORT CQE
12097  * or an SLI3 ASYNC_STATUS_CN event from the port.  For either event,
12098  * the driver is required to send a LOGO to the remote node before it
12099  * attempts to recover its login to the remote node.
12100  */
12101 void
12102 lpfc_sli_abts_recover_port(struct lpfc_vport *vport,
12103                            struct lpfc_nodelist *ndlp)
12104 {
12105         struct Scsi_Host *shost;
12106         struct lpfc_hba *phba;
12107         unsigned long flags = 0;
12108
12109         shost = lpfc_shost_from_vport(vport);
12110         phba = vport->phba;
12111         if (ndlp->nlp_state != NLP_STE_MAPPED_NODE) {
12112                 lpfc_printf_log(phba, KERN_INFO,
12113                                 LOG_SLI, "3093 No rport recovery needed. "
12114                                 "rport in state 0x%x\n", ndlp->nlp_state);
12115                 return;
12116         }
12117         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
12118                         "3094 Start rport recovery on shost id 0x%x "
12119                         "fc_id 0x%06x vpi 0x%x rpi 0x%x state 0x%x "
12120                         "flags 0x%x\n",
12121                         shost->host_no, ndlp->nlp_DID,
12122                         vport->vpi, ndlp->nlp_rpi, ndlp->nlp_state,
12123                         ndlp->nlp_flag);
12124         /*
12125          * The rport is not responding.  Remove the FCP-2 flag to prevent
12126          * an ADISC in the follow-up recovery code.
12127          */
12128         spin_lock_irqsave(&ndlp->lock, flags);
12129         ndlp->nlp_fcp_info &= ~NLP_FCP_2_DEVICE;
12130         ndlp->nlp_flag |= NLP_ISSUE_LOGO;
12131         spin_unlock_irqrestore(&ndlp->lock, flags);
12132         lpfc_unreg_rpi(vport, ndlp);
12133 }
12134
12135 static void lpfc_init_cs_ctl_bitmap(struct lpfc_vport *vport)
12136 {
12137         bitmap_zero(vport->vmid_priority_range, LPFC_VMID_MAX_PRIORITY_RANGE);
12138 }
12139
12140 static void
12141 lpfc_vmid_set_cs_ctl_range(struct lpfc_vport *vport, u32 min, u32 max)
12142 {
12143         u32 i;
12144
12145         if ((min > max) || (max > LPFC_VMID_MAX_PRIORITY_RANGE))
12146                 return;
12147
12148         for (i = min; i <= max; i++)
12149                 set_bit(i, vport->vmid_priority_range);
12150 }
12151
12152 static void lpfc_vmid_put_cs_ctl(struct lpfc_vport *vport, u32 ctcl_vmid)
12153 {
12154         set_bit(ctcl_vmid, vport->vmid_priority_range);
12155 }
12156
12157 u32 lpfc_vmid_get_cs_ctl(struct lpfc_vport *vport)
12158 {
12159         u32 i;
12160
12161         i = find_first_bit(vport->vmid_priority_range,
12162                            LPFC_VMID_MAX_PRIORITY_RANGE);
12163
12164         if (i == LPFC_VMID_MAX_PRIORITY_RANGE)
12165                 return 0;
12166
12167         clear_bit(i, vport->vmid_priority_range);
12168         return i;
12169 }
12170
12171 #define MAX_PRIORITY_DESC       255
12172
12173 static void
12174 lpfc_cmpl_els_qfpa(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
12175                    struct lpfc_iocbq *rspiocb)
12176 {
12177         struct lpfc_vport *vport = cmdiocb->vport;
12178         struct priority_range_desc *desc;
12179         struct lpfc_dmabuf *prsp = NULL;
12180         struct lpfc_vmid_priority_range *vmid_range = NULL;
12181         u32 *data;
12182         struct lpfc_dmabuf *dmabuf = cmdiocb->cmd_dmabuf;
12183         u32 ulp_status = get_job_ulpstatus(phba, rspiocb);
12184         u32 ulp_word4 = get_job_word4(phba, rspiocb);
12185         u8 *pcmd, max_desc;
12186         u32 len, i;
12187         struct lpfc_nodelist *ndlp = cmdiocb->ndlp;
12188
12189         prsp = list_get_first(&dmabuf->list, struct lpfc_dmabuf, list);
12190         if (!prsp)
12191                 goto out;
12192
12193         pcmd = prsp->virt;
12194         data = (u32 *)pcmd;
12195         if (data[0] == ELS_CMD_LS_RJT) {
12196                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_SLI,
12197                                  "3277 QFPA LS_RJT x%x  x%x\n",
12198                                  data[0], data[1]);
12199                 goto out;
12200         }
12201         if (ulp_status) {
12202                 lpfc_printf_vlog(vport, KERN_ERR, LOG_SLI,
12203                                  "6529 QFPA failed with status x%x  x%x\n",
12204                                  ulp_status, ulp_word4);
12205                 goto out;
12206         }
12207
12208         if (!vport->qfpa_res) {
12209                 max_desc = FCELSSIZE / sizeof(*vport->qfpa_res);
12210                 vport->qfpa_res = kcalloc(max_desc, sizeof(*vport->qfpa_res),
12211                                           GFP_KERNEL);
12212                 if (!vport->qfpa_res)
12213                         goto out;
12214         }
12215
12216         len = *((u32 *)(pcmd + 4));
12217         len = be32_to_cpu(len);
12218         memcpy(vport->qfpa_res, pcmd, len + 8);
12219         len = len / LPFC_PRIORITY_RANGE_DESC_SIZE;
12220
12221         desc = (struct priority_range_desc *)(pcmd + 8);
12222         vmid_range = vport->vmid_priority.vmid_range;
12223         if (!vmid_range) {
12224                 vmid_range = kcalloc(MAX_PRIORITY_DESC, sizeof(*vmid_range),
12225                                      GFP_KERNEL);
12226                 if (!vmid_range) {
12227                         kfree(vport->qfpa_res);
12228                         goto out;
12229                 }
12230                 vport->vmid_priority.vmid_range = vmid_range;
12231         }
12232         vport->vmid_priority.num_descriptors = len;
12233
12234         for (i = 0; i < len; i++, vmid_range++, desc++) {
12235                 lpfc_printf_vlog(vport, KERN_DEBUG, LOG_ELS,
12236                                  "6539 vmid values low=%d, high=%d, qos=%d, "
12237                                  "local ve id=%d\n", desc->lo_range,
12238                                  desc->hi_range, desc->qos_priority,
12239                                  desc->local_ve_id);
12240
12241                 vmid_range->low = desc->lo_range << 1;
12242                 if (desc->local_ve_id == QFPA_ODD_ONLY)
12243                         vmid_range->low++;
12244                 if (desc->qos_priority)
12245                         vport->vmid_flag |= LPFC_VMID_QOS_ENABLED;
12246                 vmid_range->qos = desc->qos_priority;
12247
12248                 vmid_range->high = desc->hi_range << 1;
12249                 if ((desc->local_ve_id == QFPA_ODD_ONLY) ||
12250                     (desc->local_ve_id == QFPA_EVEN_ODD))
12251                         vmid_range->high++;
12252         }
12253         lpfc_init_cs_ctl_bitmap(vport);
12254         for (i = 0; i < vport->vmid_priority.num_descriptors; i++) {
12255                 lpfc_vmid_set_cs_ctl_range(vport,
12256                                 vport->vmid_priority.vmid_range[i].low,
12257                                 vport->vmid_priority.vmid_range[i].high);
12258         }
12259
12260         vport->vmid_flag |= LPFC_VMID_QFPA_CMPL;
12261  out:
12262         lpfc_els_free_iocb(phba, cmdiocb);
12263         lpfc_nlp_put(ndlp);
12264 }
12265
12266 int lpfc_issue_els_qfpa(struct lpfc_vport *vport)
12267 {
12268         struct lpfc_hba *phba = vport->phba;
12269         struct lpfc_nodelist *ndlp;
12270         struct lpfc_iocbq *elsiocb;
12271         u8 *pcmd;
12272         int ret;
12273
12274         ndlp = lpfc_findnode_did(phba->pport, Fabric_DID);
12275         if (!ndlp || ndlp->nlp_state != NLP_STE_UNMAPPED_NODE)
12276                 return -ENXIO;
12277
12278         elsiocb = lpfc_prep_els_iocb(vport, 1, LPFC_QFPA_SIZE, 2, ndlp,
12279                                      ndlp->nlp_DID, ELS_CMD_QFPA);
12280         if (!elsiocb)
12281                 return -ENOMEM;
12282
12283         pcmd = (u8 *)elsiocb->cmd_dmabuf->virt;
12284
12285         *((u32 *)(pcmd)) = ELS_CMD_QFPA;
12286         pcmd += 4;
12287
12288         elsiocb->cmd_cmpl = lpfc_cmpl_els_qfpa;
12289
12290         elsiocb->ndlp = lpfc_nlp_get(ndlp);
12291         if (!elsiocb->ndlp) {
12292                 lpfc_els_free_iocb(vport->phba, elsiocb);
12293                 return -ENXIO;
12294         }
12295
12296         ret = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 2);
12297         if (ret != IOCB_SUCCESS) {
12298                 lpfc_els_free_iocb(phba, elsiocb);
12299                 lpfc_nlp_put(ndlp);
12300                 return -EIO;
12301         }
12302         vport->vmid_flag &= ~LPFC_VMID_QOS_ENABLED;
12303         return 0;
12304 }
12305
12306 int
12307 lpfc_vmid_uvem(struct lpfc_vport *vport,
12308                struct lpfc_vmid *vmid, bool instantiated)
12309 {
12310         struct lpfc_vem_id_desc *vem_id_desc;
12311         struct lpfc_nodelist *ndlp;
12312         struct lpfc_iocbq *elsiocb;
12313         struct instantiated_ve_desc *inst_desc;
12314         struct lpfc_vmid_context *vmid_context;
12315         u8 *pcmd;
12316         u32 *len;
12317         int ret = 0;
12318
12319         ndlp = lpfc_findnode_did(vport, Fabric_DID);
12320         if (!ndlp || ndlp->nlp_state != NLP_STE_UNMAPPED_NODE)
12321                 return -ENXIO;
12322
12323         vmid_context = kmalloc(sizeof(*vmid_context), GFP_KERNEL);
12324         if (!vmid_context)
12325                 return -ENOMEM;
12326         elsiocb = lpfc_prep_els_iocb(vport, 1, LPFC_UVEM_SIZE, 2,
12327                                      ndlp, Fabric_DID, ELS_CMD_UVEM);
12328         if (!elsiocb)
12329                 goto out;
12330
12331         lpfc_printf_vlog(vport, KERN_DEBUG, LOG_ELS,
12332                          "3427 Host vmid %s %d\n",
12333                          vmid->host_vmid, instantiated);
12334         vmid_context->vmp = vmid;
12335         vmid_context->nlp = ndlp;
12336         vmid_context->instantiated = instantiated;
12337         elsiocb->vmid_tag.vmid_context = vmid_context;
12338         pcmd = (u8 *)elsiocb->cmd_dmabuf->virt;
12339
12340         if (uuid_is_null((uuid_t *)vport->lpfc_vmid_host_uuid))
12341                 memcpy(vport->lpfc_vmid_host_uuid, vmid->host_vmid,
12342                        LPFC_COMPRESS_VMID_SIZE);
12343
12344         *((u32 *)(pcmd)) = ELS_CMD_UVEM;
12345         len = (u32 *)(pcmd + 4);
12346         *len = cpu_to_be32(LPFC_UVEM_SIZE - 8);
12347
12348         vem_id_desc = (struct lpfc_vem_id_desc *)(pcmd + 8);
12349         vem_id_desc->tag = be32_to_cpu(VEM_ID_DESC_TAG);
12350         vem_id_desc->length = be32_to_cpu(LPFC_UVEM_VEM_ID_DESC_SIZE);
12351         memcpy(vem_id_desc->vem_id, vport->lpfc_vmid_host_uuid,
12352                LPFC_COMPRESS_VMID_SIZE);
12353
12354         inst_desc = (struct instantiated_ve_desc *)(pcmd + 32);
12355         inst_desc->tag = be32_to_cpu(INSTANTIATED_VE_DESC_TAG);
12356         inst_desc->length = be32_to_cpu(LPFC_UVEM_VE_MAP_DESC_SIZE);
12357         memcpy(inst_desc->global_vem_id, vmid->host_vmid,
12358                LPFC_COMPRESS_VMID_SIZE);
12359
12360         bf_set(lpfc_instantiated_nport_id, inst_desc, vport->fc_myDID);
12361         bf_set(lpfc_instantiated_local_id, inst_desc,
12362                vmid->un.cs_ctl_vmid);
12363         if (instantiated) {
12364                 inst_desc->tag = be32_to_cpu(INSTANTIATED_VE_DESC_TAG);
12365         } else {
12366                 inst_desc->tag = be32_to_cpu(DEINSTANTIATED_VE_DESC_TAG);
12367                 lpfc_vmid_put_cs_ctl(vport, vmid->un.cs_ctl_vmid);
12368         }
12369         inst_desc->word6 = cpu_to_be32(inst_desc->word6);
12370
12371         elsiocb->cmd_cmpl = lpfc_cmpl_els_uvem;
12372
12373         elsiocb->ndlp = lpfc_nlp_get(ndlp);
12374         if (!elsiocb->ndlp) {
12375                 lpfc_els_free_iocb(vport->phba, elsiocb);
12376                 goto out;
12377         }
12378
12379         ret = lpfc_sli_issue_iocb(vport->phba, LPFC_ELS_RING, elsiocb, 0);
12380         if (ret != IOCB_SUCCESS) {
12381                 lpfc_els_free_iocb(vport->phba, elsiocb);
12382                 lpfc_nlp_put(ndlp);
12383                 goto out;
12384         }
12385
12386         return 0;
12387  out:
12388         kfree(vmid_context);
12389         return -EIO;
12390 }
12391
12392 static void
12393 lpfc_cmpl_els_uvem(struct lpfc_hba *phba, struct lpfc_iocbq *icmdiocb,
12394                    struct lpfc_iocbq *rspiocb)
12395 {
12396         struct lpfc_vport *vport = icmdiocb->vport;
12397         struct lpfc_dmabuf *prsp = NULL;
12398         struct lpfc_vmid_context *vmid_context =
12399             icmdiocb->vmid_tag.vmid_context;
12400         struct lpfc_nodelist *ndlp = icmdiocb->ndlp;
12401         u8 *pcmd;
12402         u32 *data;
12403         u32 ulp_status = get_job_ulpstatus(phba, rspiocb);
12404         u32 ulp_word4 = get_job_word4(phba, rspiocb);
12405         struct lpfc_dmabuf *dmabuf = icmdiocb->cmd_dmabuf;
12406         struct lpfc_vmid *vmid;
12407
12408         vmid = vmid_context->vmp;
12409         if (!ndlp || ndlp->nlp_state != NLP_STE_UNMAPPED_NODE)
12410                 ndlp = NULL;
12411
12412         prsp = list_get_first(&dmabuf->list, struct lpfc_dmabuf, list);
12413         if (!prsp)
12414                 goto out;
12415         pcmd = prsp->virt;
12416         data = (u32 *)pcmd;
12417         if (data[0] == ELS_CMD_LS_RJT) {
12418                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_SLI,
12419                                  "4532 UVEM LS_RJT %x %x\n", data[0], data[1]);
12420                 goto out;
12421         }
12422         if (ulp_status) {
12423                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_SLI,
12424                                  "4533 UVEM error status %x: %x\n",
12425                                  ulp_status, ulp_word4);
12426                 goto out;
12427         }
12428         spin_lock(&phba->hbalock);
12429         /* Set IN USE flag */
12430         vport->vmid_flag |= LPFC_VMID_IN_USE;
12431         phba->pport->vmid_flag |= LPFC_VMID_IN_USE;
12432         spin_unlock(&phba->hbalock);
12433
12434         if (vmid_context->instantiated) {
12435                 write_lock(&vport->vmid_lock);
12436                 vmid->flag |= LPFC_VMID_REGISTERED;
12437                 vmid->flag &= ~LPFC_VMID_REQ_REGISTER;
12438                 write_unlock(&vport->vmid_lock);
12439         }
12440
12441  out:
12442         kfree(vmid_context);
12443         lpfc_els_free_iocb(phba, icmdiocb);
12444         lpfc_nlp_put(ndlp);
12445 }