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. If the node has transitioned to NPR,
5209  * this routine unregisters the RPI if it is still registered. The
5210  * lpfc_els_free_iocb() is invoked to release the IOCB data structure.
5211  **/
5212 static void
5213 lpfc_cmpl_els_logo_acc(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
5214                        struct lpfc_iocbq *rspiocb)
5215 {
5216         struct lpfc_nodelist *ndlp = cmdiocb->ndlp;
5217         struct lpfc_vport *vport = cmdiocb->vport;
5218         u32 ulp_status, ulp_word4;
5219
5220         ulp_status = get_job_ulpstatus(phba, rspiocb);
5221         ulp_word4 = get_job_word4(phba, rspiocb);
5222
5223         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
5224                 "ACC LOGO cmpl:   status:x%x/x%x did:x%x",
5225                 ulp_status, ulp_word4, ndlp->nlp_DID);
5226         /* ACC to LOGO completes to NPort <nlp_DID> */
5227         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
5228                          "0109 ACC to LOGO completes to NPort x%x refcnt %d "
5229                          "Data: x%x x%x x%x\n",
5230                          ndlp->nlp_DID, kref_read(&ndlp->kref), ndlp->nlp_flag,
5231                          ndlp->nlp_state, ndlp->nlp_rpi);
5232
5233         /* This clause allows the LOGO ACC to complete and free resources
5234          * for the Fabric Domain Controller.  It does deliberately skip
5235          * the unreg_rpi and release rpi because some fabrics send RDP
5236          * requests after logging out from the initiator.
5237          */
5238         if (ndlp->nlp_type & NLP_FABRIC &&
5239             ((ndlp->nlp_DID & WELL_KNOWN_DID_MASK) != WELL_KNOWN_DID_MASK))
5240                 goto out;
5241
5242         if (ndlp->nlp_state == NLP_STE_NPR_NODE) {
5243                 /* If PLOGI is being retried, PLOGI completion will cleanup the
5244                  * node. The NLP_NPR_2B_DISC flag needs to be retained to make
5245                  * progress on nodes discovered from last RSCN.
5246                  */
5247                 if ((ndlp->nlp_flag & NLP_DELAY_TMO) &&
5248                     (ndlp->nlp_last_elscmd == ELS_CMD_PLOGI))
5249                         goto out;
5250
5251                 if (ndlp->nlp_flag & NLP_RPI_REGISTERED)
5252                         lpfc_unreg_rpi(vport, ndlp);
5253
5254         }
5255  out:
5256         /*
5257          * The driver received a LOGO from the rport and has ACK'd it.
5258          * At this point, the driver is done so release the IOCB
5259          */
5260         lpfc_els_free_iocb(phba, cmdiocb);
5261         lpfc_nlp_put(ndlp);
5262 }
5263
5264 /**
5265  * lpfc_mbx_cmpl_dflt_rpi - Completion callbk func for unreg dflt rpi mbox cmd
5266  * @phba: pointer to lpfc hba data structure.
5267  * @pmb: pointer to the driver internal queue element for mailbox command.
5268  *
5269  * This routine is the completion callback function for unregister default
5270  * RPI (Remote Port Index) mailbox command to the @phba. It simply releases
5271  * the associated lpfc Direct Memory Access (DMA) buffer back to the pool and
5272  * decrements the ndlp reference count held for this completion callback
5273  * function. After that, it invokes the lpfc_drop_node to check
5274  * whether it is appropriate to release the node.
5275  **/
5276 void
5277 lpfc_mbx_cmpl_dflt_rpi(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
5278 {
5279         struct lpfc_nodelist *ndlp = pmb->ctx_ndlp;
5280         u32 mbx_flag = pmb->mbox_flag;
5281         u32 mbx_cmd = pmb->u.mb.mbxCommand;
5282
5283         if (ndlp) {
5284                 lpfc_printf_vlog(ndlp->vport, KERN_INFO, LOG_NODE,
5285                                  "0006 rpi x%x DID:%x flg:%x %d x%px "
5286                                  "mbx_cmd x%x mbx_flag x%x x%px\n",
5287                                  ndlp->nlp_rpi, ndlp->nlp_DID, ndlp->nlp_flag,
5288                                  kref_read(&ndlp->kref), ndlp, mbx_cmd,
5289                                  mbx_flag, pmb);
5290
5291                 /* This ends the default/temporary RPI cleanup logic for this
5292                  * ndlp and the node and rpi needs to be released. Free the rpi
5293                  * first on an UNREG_LOGIN and then release the final
5294                  * references.
5295                  */
5296                 spin_lock_irq(&ndlp->lock);
5297                 ndlp->nlp_flag &= ~NLP_REG_LOGIN_SEND;
5298                 if (mbx_cmd == MBX_UNREG_LOGIN)
5299                         ndlp->nlp_flag &= ~NLP_UNREG_INP;
5300                 spin_unlock_irq(&ndlp->lock);
5301                 lpfc_nlp_put(ndlp);
5302                 lpfc_drop_node(ndlp->vport, ndlp);
5303         }
5304
5305         lpfc_mbox_rsrc_cleanup(phba, pmb, MBOX_THD_UNLOCKED);
5306 }
5307
5308 /**
5309  * lpfc_cmpl_els_rsp - Completion callback function for els response iocb cmd
5310  * @phba: pointer to lpfc hba data structure.
5311  * @cmdiocb: pointer to lpfc command iocb data structure.
5312  * @rspiocb: pointer to lpfc response iocb data structure.
5313  *
5314  * This routine is the completion callback function for ELS Response IOCB
5315  * command. In normal case, this callback function just properly sets the
5316  * nlp_flag bitmap in the ndlp data structure, if the mbox command reference
5317  * field in the command IOCB is not NULL, the referred mailbox command will
5318  * be send out, and then invokes the lpfc_els_free_iocb() routine to release
5319  * the IOCB.
5320  **/
5321 static void
5322 lpfc_cmpl_els_rsp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
5323                   struct lpfc_iocbq *rspiocb)
5324 {
5325         struct lpfc_nodelist *ndlp = cmdiocb->ndlp;
5326         struct lpfc_vport *vport = ndlp ? ndlp->vport : NULL;
5327         struct Scsi_Host  *shost = vport ? lpfc_shost_from_vport(vport) : NULL;
5328         IOCB_t  *irsp;
5329         LPFC_MBOXQ_t *mbox = NULL;
5330         u32 ulp_status, ulp_word4, tmo, did, iotag;
5331
5332         if (!vport) {
5333                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
5334                                 "3177 ELS response failed\n");
5335                 goto out;
5336         }
5337         if (cmdiocb->context_un.mbox)
5338                 mbox = cmdiocb->context_un.mbox;
5339
5340         ulp_status = get_job_ulpstatus(phba, rspiocb);
5341         ulp_word4 = get_job_word4(phba, rspiocb);
5342         did = get_job_els_rsp64_did(phba, cmdiocb);
5343
5344         if (phba->sli_rev == LPFC_SLI_REV4) {
5345                 tmo = get_wqe_tmo(cmdiocb);
5346                 iotag = get_wqe_reqtag(cmdiocb);
5347         } else {
5348                 irsp = &rspiocb->iocb;
5349                 tmo = irsp->ulpTimeout;
5350                 iotag = irsp->ulpIoTag;
5351         }
5352
5353         /* Check to see if link went down during discovery */
5354         if (!ndlp || lpfc_els_chk_latt(vport)) {
5355                 if (mbox)
5356                         lpfc_mbox_rsrc_cleanup(phba, mbox, MBOX_THD_UNLOCKED);
5357                 goto out;
5358         }
5359
5360         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
5361                 "ELS rsp cmpl:    status:x%x/x%x did:x%x",
5362                 ulp_status, ulp_word4, did);
5363         /* ELS response tag <ulpIoTag> completes */
5364         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
5365                          "0110 ELS response tag x%x completes "
5366                          "Data: x%x x%x x%x x%x x%x x%x x%x x%x %p %p\n",
5367                          iotag, ulp_status, ulp_word4, tmo,
5368                          ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
5369                          ndlp->nlp_rpi, kref_read(&ndlp->kref), mbox, ndlp);
5370         if (mbox) {
5371                 if (ulp_status == 0
5372                     && (ndlp->nlp_flag & NLP_ACC_REGLOGIN)) {
5373                         if (!lpfc_unreg_rpi(vport, ndlp) &&
5374                             (!(vport->fc_flag & FC_PT2PT))) {
5375                                 if (ndlp->nlp_state ==  NLP_STE_PLOGI_ISSUE ||
5376                                     ndlp->nlp_state ==
5377                                      NLP_STE_REG_LOGIN_ISSUE) {
5378                                         lpfc_printf_vlog(vport, KERN_INFO,
5379                                                          LOG_DISCOVERY,
5380                                                          "0314 PLOGI recov "
5381                                                          "DID x%x "
5382                                                          "Data: x%x x%x x%x\n",
5383                                                          ndlp->nlp_DID,
5384                                                          ndlp->nlp_state,
5385                                                          ndlp->nlp_rpi,
5386                                                          ndlp->nlp_flag);
5387                                         goto out_free_mbox;
5388                                 }
5389                         }
5390
5391                         /* Increment reference count to ndlp to hold the
5392                          * reference to ndlp for the callback function.
5393                          */
5394                         mbox->ctx_ndlp = lpfc_nlp_get(ndlp);
5395                         if (!mbox->ctx_ndlp)
5396                                 goto out_free_mbox;
5397
5398                         mbox->vport = vport;
5399                         if (ndlp->nlp_flag & NLP_RM_DFLT_RPI) {
5400                                 mbox->mbox_flag |= LPFC_MBX_IMED_UNREG;
5401                                 mbox->mbox_cmpl = lpfc_mbx_cmpl_dflt_rpi;
5402                         }
5403                         else {
5404                                 mbox->mbox_cmpl = lpfc_mbx_cmpl_reg_login;
5405                                 ndlp->nlp_prev_state = ndlp->nlp_state;
5406                                 lpfc_nlp_set_state(vport, ndlp,
5407                                            NLP_STE_REG_LOGIN_ISSUE);
5408                         }
5409
5410                         ndlp->nlp_flag |= NLP_REG_LOGIN_SEND;
5411                         if (lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT)
5412                             != MBX_NOT_FINISHED)
5413                                 goto out;
5414
5415                         /* Decrement the ndlp reference count we
5416                          * set for this failed mailbox command.
5417                          */
5418                         lpfc_nlp_put(ndlp);
5419                         ndlp->nlp_flag &= ~NLP_REG_LOGIN_SEND;
5420
5421                         /* ELS rsp: Cannot issue reg_login for <NPortid> */
5422                         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
5423                                 "0138 ELS rsp: Cannot issue reg_login for x%x "
5424                                 "Data: x%x x%x x%x\n",
5425                                 ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
5426                                 ndlp->nlp_rpi);
5427                 }
5428 out_free_mbox:
5429                 lpfc_mbox_rsrc_cleanup(phba, mbox, MBOX_THD_UNLOCKED);
5430         }
5431 out:
5432         if (ndlp && shost) {
5433                 spin_lock_irq(&ndlp->lock);
5434                 if (mbox)
5435                         ndlp->nlp_flag &= ~NLP_ACC_REGLOGIN;
5436                 ndlp->nlp_flag &= ~NLP_RM_DFLT_RPI;
5437                 spin_unlock_irq(&ndlp->lock);
5438         }
5439
5440         /* An SLI4 NPIV instance wants to drop the node at this point under
5441          * these conditions and release the RPI.
5442          */
5443         if (phba->sli_rev == LPFC_SLI_REV4 &&
5444             vport && vport->port_type == LPFC_NPIV_PORT &&
5445             !(ndlp->fc4_xpt_flags & SCSI_XPT_REGD)) {
5446                 if (ndlp->nlp_flag & NLP_RELEASE_RPI) {
5447                         if (ndlp->nlp_state != NLP_STE_PLOGI_ISSUE &&
5448                             ndlp->nlp_state != NLP_STE_REG_LOGIN_ISSUE) {
5449                                 lpfc_sli4_free_rpi(phba, ndlp->nlp_rpi);
5450                                 spin_lock_irq(&ndlp->lock);
5451                                 ndlp->nlp_rpi = LPFC_RPI_ALLOC_ERROR;
5452                                 ndlp->nlp_flag &= ~NLP_RELEASE_RPI;
5453                                 spin_unlock_irq(&ndlp->lock);
5454                         }
5455                         lpfc_drop_node(vport, ndlp);
5456                 } else if (ndlp->nlp_state != NLP_STE_PLOGI_ISSUE &&
5457                            ndlp->nlp_state != NLP_STE_REG_LOGIN_ISSUE &&
5458                            ndlp->nlp_state != NLP_STE_PRLI_ISSUE) {
5459                         /* Drop ndlp if there is no planned or outstanding
5460                          * issued PRLI.
5461                          *
5462                          * In cases when the ndlp is acting as both an initiator
5463                          * and target function, let our issued PRLI determine
5464                          * the final ndlp kref drop.
5465                          */
5466                         lpfc_drop_node(vport, ndlp);
5467                 }
5468         }
5469
5470         /* Release the originating I/O reference. */
5471         lpfc_els_free_iocb(phba, cmdiocb);
5472         lpfc_nlp_put(ndlp);
5473         return;
5474 }
5475
5476 /**
5477  * lpfc_els_rsp_acc - Prepare and issue an acc response iocb command
5478  * @vport: pointer to a host virtual N_Port data structure.
5479  * @flag: the els command code to be accepted.
5480  * @oldiocb: pointer to the original lpfc command iocb data structure.
5481  * @ndlp: pointer to a node-list data structure.
5482  * @mbox: pointer to the driver internal queue element for mailbox command.
5483  *
5484  * This routine prepares and issues an Accept (ACC) response IOCB
5485  * command. It uses the @flag to properly set up the IOCB field for the
5486  * specific ACC response command to be issued and invokes the
5487  * lpfc_sli_issue_iocb() routine to send out ACC response IOCB. If a
5488  * @mbox pointer is passed in, it will be put into the context_un.mbox
5489  * field of the IOCB for the completion callback function to issue the
5490  * mailbox command to the HBA later when callback is invoked.
5491  *
5492  * Note that the ndlp reference count will be incremented by 1 for holding the
5493  * ndlp and the reference to ndlp will be stored into the ndlp field of
5494  * the IOCB for the completion callback function to the corresponding
5495  * response ELS IOCB command.
5496  *
5497  * Return code
5498  *   0 - Successfully issued acc response
5499  *   1 - Failed to issue acc response
5500  **/
5501 int
5502 lpfc_els_rsp_acc(struct lpfc_vport *vport, uint32_t flag,
5503                  struct lpfc_iocbq *oldiocb, struct lpfc_nodelist *ndlp,
5504                  LPFC_MBOXQ_t *mbox)
5505 {
5506         struct lpfc_hba  *phba = vport->phba;
5507         IOCB_t *icmd;
5508         IOCB_t *oldcmd;
5509         union lpfc_wqe128 *wqe;
5510         union lpfc_wqe128 *oldwqe = &oldiocb->wqe;
5511         struct lpfc_iocbq *elsiocb;
5512         uint8_t *pcmd;
5513         struct serv_parm *sp;
5514         uint16_t cmdsize;
5515         int rc;
5516         ELS_PKT *els_pkt_ptr;
5517         struct fc_els_rdf_resp *rdf_resp;
5518
5519         switch (flag) {
5520         case ELS_CMD_ACC:
5521                 cmdsize = sizeof(uint32_t);
5522                 elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, oldiocb->retry,
5523                                              ndlp, ndlp->nlp_DID, ELS_CMD_ACC);
5524                 if (!elsiocb) {
5525                         spin_lock_irq(&ndlp->lock);
5526                         ndlp->nlp_flag &= ~NLP_LOGO_ACC;
5527                         spin_unlock_irq(&ndlp->lock);
5528                         return 1;
5529                 }
5530
5531                 if (phba->sli_rev == LPFC_SLI_REV4) {
5532                         wqe = &elsiocb->wqe;
5533                         /* XRI / rx_id */
5534                         bf_set(wqe_ctxt_tag, &wqe->xmit_els_rsp.wqe_com,
5535                                bf_get(wqe_ctxt_tag,
5536                                       &oldwqe->xmit_els_rsp.wqe_com));
5537
5538                         /* oxid */
5539                         bf_set(wqe_rcvoxid, &wqe->xmit_els_rsp.wqe_com,
5540                                bf_get(wqe_rcvoxid,
5541                                       &oldwqe->xmit_els_rsp.wqe_com));
5542                 } else {
5543                         icmd = &elsiocb->iocb;
5544                         oldcmd = &oldiocb->iocb;
5545                         icmd->ulpContext = oldcmd->ulpContext; /* Xri / rx_id */
5546                         icmd->unsli3.rcvsli3.ox_id =
5547                                 oldcmd->unsli3.rcvsli3.ox_id;
5548                 }
5549
5550                 pcmd = elsiocb->cmd_dmabuf->virt;
5551                 *((uint32_t *) (pcmd)) = ELS_CMD_ACC;
5552                 pcmd += sizeof(uint32_t);
5553
5554                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
5555                         "Issue ACC:       did:x%x flg:x%x",
5556                         ndlp->nlp_DID, ndlp->nlp_flag, 0);
5557                 break;
5558         case ELS_CMD_FLOGI:
5559         case ELS_CMD_PLOGI:
5560                 cmdsize = (sizeof(struct serv_parm) + sizeof(uint32_t));
5561                 elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, oldiocb->retry,
5562                                              ndlp, ndlp->nlp_DID, ELS_CMD_ACC);
5563                 if (!elsiocb)
5564                         return 1;
5565
5566                 if (phba->sli_rev == LPFC_SLI_REV4) {
5567                         wqe = &elsiocb->wqe;
5568                         /* XRI / rx_id */
5569                         bf_set(wqe_ctxt_tag, &wqe->xmit_els_rsp.wqe_com,
5570                                bf_get(wqe_ctxt_tag,
5571                                       &oldwqe->xmit_els_rsp.wqe_com));
5572
5573                         /* oxid */
5574                         bf_set(wqe_rcvoxid, &wqe->xmit_els_rsp.wqe_com,
5575                                bf_get(wqe_rcvoxid,
5576                                       &oldwqe->xmit_els_rsp.wqe_com));
5577                 } else {
5578                         icmd = &elsiocb->iocb;
5579                         oldcmd = &oldiocb->iocb;
5580                         icmd->ulpContext = oldcmd->ulpContext; /* Xri / rx_id */
5581                         icmd->unsli3.rcvsli3.ox_id =
5582                                 oldcmd->unsli3.rcvsli3.ox_id;
5583                 }
5584
5585                 pcmd = (u8 *)elsiocb->cmd_dmabuf->virt;
5586
5587                 if (mbox)
5588                         elsiocb->context_un.mbox = mbox;
5589
5590                 *((uint32_t *) (pcmd)) = ELS_CMD_ACC;
5591                 pcmd += sizeof(uint32_t);
5592                 sp = (struct serv_parm *)pcmd;
5593
5594                 if (flag == ELS_CMD_FLOGI) {
5595                         /* Copy the received service parameters back */
5596                         memcpy(sp, &phba->fc_fabparam,
5597                                sizeof(struct serv_parm));
5598
5599                         /* Clear the F_Port bit */
5600                         sp->cmn.fPort = 0;
5601
5602                         /* Mark all class service parameters as invalid */
5603                         sp->cls1.classValid = 0;
5604                         sp->cls2.classValid = 0;
5605                         sp->cls3.classValid = 0;
5606                         sp->cls4.classValid = 0;
5607
5608                         /* Copy our worldwide names */
5609                         memcpy(&sp->portName, &vport->fc_sparam.portName,
5610                                sizeof(struct lpfc_name));
5611                         memcpy(&sp->nodeName, &vport->fc_sparam.nodeName,
5612                                sizeof(struct lpfc_name));
5613                 } else {
5614                         memcpy(pcmd, &vport->fc_sparam,
5615                                sizeof(struct serv_parm));
5616
5617                         sp->cmn.valid_vendor_ver_level = 0;
5618                         memset(sp->un.vendorVersion, 0,
5619                                sizeof(sp->un.vendorVersion));
5620                         sp->cmn.bbRcvSizeMsb &= 0xF;
5621
5622                         /* If our firmware supports this feature, convey that
5623                          * info to the target using the vendor specific field.
5624                          */
5625                         if (phba->sli.sli_flag & LPFC_SLI_SUPPRESS_RSP) {
5626                                 sp->cmn.valid_vendor_ver_level = 1;
5627                                 sp->un.vv.vid = cpu_to_be32(LPFC_VV_EMLX_ID);
5628                                 sp->un.vv.flags =
5629                                         cpu_to_be32(LPFC_VV_SUPPRESS_RSP);
5630                         }
5631                 }
5632
5633                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
5634                         "Issue ACC FLOGI/PLOGI: did:x%x flg:x%x",
5635                         ndlp->nlp_DID, ndlp->nlp_flag, 0);
5636                 break;
5637         case ELS_CMD_PRLO:
5638                 cmdsize = sizeof(uint32_t) + sizeof(PRLO);
5639                 elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, oldiocb->retry,
5640                                              ndlp, ndlp->nlp_DID, ELS_CMD_PRLO);
5641                 if (!elsiocb)
5642                         return 1;
5643
5644                 if (phba->sli_rev == LPFC_SLI_REV4) {
5645                         wqe = &elsiocb->wqe;
5646                         /* XRI / rx_id */
5647                         bf_set(wqe_ctxt_tag, &wqe->xmit_els_rsp.wqe_com,
5648                                bf_get(wqe_ctxt_tag,
5649                                       &oldwqe->xmit_els_rsp.wqe_com));
5650
5651                         /* oxid */
5652                         bf_set(wqe_rcvoxid, &wqe->xmit_els_rsp.wqe_com,
5653                                bf_get(wqe_rcvoxid,
5654                                       &oldwqe->xmit_els_rsp.wqe_com));
5655                 } else {
5656                         icmd = &elsiocb->iocb;
5657                         oldcmd = &oldiocb->iocb;
5658                         icmd->ulpContext = oldcmd->ulpContext; /* Xri / rx_id */
5659                         icmd->unsli3.rcvsli3.ox_id =
5660                                 oldcmd->unsli3.rcvsli3.ox_id;
5661                 }
5662
5663                 pcmd = (u8 *) elsiocb->cmd_dmabuf->virt;
5664
5665                 memcpy(pcmd, oldiocb->cmd_dmabuf->virt,
5666                        sizeof(uint32_t) + sizeof(PRLO));
5667                 *((uint32_t *) (pcmd)) = ELS_CMD_PRLO_ACC;
5668                 els_pkt_ptr = (ELS_PKT *) pcmd;
5669                 els_pkt_ptr->un.prlo.acceptRspCode = PRLO_REQ_EXECUTED;
5670
5671                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
5672                         "Issue ACC PRLO:  did:x%x flg:x%x",
5673                         ndlp->nlp_DID, ndlp->nlp_flag, 0);
5674                 break;
5675         case ELS_CMD_RDF:
5676                 cmdsize = sizeof(*rdf_resp);
5677                 elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, oldiocb->retry,
5678                                              ndlp, ndlp->nlp_DID, ELS_CMD_ACC);
5679                 if (!elsiocb)
5680                         return 1;
5681
5682                 if (phba->sli_rev == LPFC_SLI_REV4) {
5683                         wqe = &elsiocb->wqe;
5684                         /* XRI / rx_id */
5685                         bf_set(wqe_ctxt_tag, &wqe->xmit_els_rsp.wqe_com,
5686                                bf_get(wqe_ctxt_tag,
5687                                       &oldwqe->xmit_els_rsp.wqe_com));
5688
5689                         /* oxid */
5690                         bf_set(wqe_rcvoxid, &wqe->xmit_els_rsp.wqe_com,
5691                                bf_get(wqe_rcvoxid,
5692                                       &oldwqe->xmit_els_rsp.wqe_com));
5693                 } else {
5694                         icmd = &elsiocb->iocb;
5695                         oldcmd = &oldiocb->iocb;
5696                         icmd->ulpContext = oldcmd->ulpContext; /* Xri / rx_id */
5697                         icmd->unsli3.rcvsli3.ox_id =
5698                                 oldcmd->unsli3.rcvsli3.ox_id;
5699                 }
5700
5701                 pcmd = (u8 *)elsiocb->cmd_dmabuf->virt;
5702                 rdf_resp = (struct fc_els_rdf_resp *)pcmd;
5703                 memset(rdf_resp, 0, sizeof(*rdf_resp));
5704                 rdf_resp->acc_hdr.la_cmd = ELS_LS_ACC;
5705
5706                 /* FC-LS-5 specifies desc_list_len shall be set to 12 */
5707                 rdf_resp->desc_list_len = cpu_to_be32(12);
5708
5709                 /* FC-LS-5 specifies LS REQ Information descriptor */
5710                 rdf_resp->lsri.desc_tag = cpu_to_be32(1);
5711                 rdf_resp->lsri.desc_len = cpu_to_be32(sizeof(u32));
5712                 rdf_resp->lsri.rqst_w0.cmd = ELS_RDF;
5713                 break;
5714         default:
5715                 return 1;
5716         }
5717         if (ndlp->nlp_flag & NLP_LOGO_ACC) {
5718                 spin_lock_irq(&ndlp->lock);
5719                 if (!(ndlp->nlp_flag & NLP_RPI_REGISTERED ||
5720                         ndlp->nlp_flag & NLP_REG_LOGIN_SEND))
5721                         ndlp->nlp_flag &= ~NLP_LOGO_ACC;
5722                 spin_unlock_irq(&ndlp->lock);
5723                 elsiocb->cmd_cmpl = lpfc_cmpl_els_logo_acc;
5724         } else {
5725                 elsiocb->cmd_cmpl = lpfc_cmpl_els_rsp;
5726         }
5727
5728         phba->fc_stat.elsXmitACC++;
5729         elsiocb->ndlp = lpfc_nlp_get(ndlp);
5730         if (!elsiocb->ndlp) {
5731                 lpfc_els_free_iocb(phba, elsiocb);
5732                 return 1;
5733         }
5734
5735         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
5736         if (rc == IOCB_ERROR) {
5737                 lpfc_els_free_iocb(phba, elsiocb);
5738                 lpfc_nlp_put(ndlp);
5739                 return 1;
5740         }
5741
5742         /* Xmit ELS ACC response tag <ulpIoTag> */
5743         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
5744                          "0128 Xmit ELS ACC response Status: x%x, IoTag: x%x, "
5745                          "XRI: x%x, DID: x%x, nlp_flag: x%x nlp_state: x%x "
5746                          "RPI: x%x, fc_flag x%x refcnt %d\n",
5747                          rc, elsiocb->iotag, elsiocb->sli4_xritag,
5748                          ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
5749                          ndlp->nlp_rpi, vport->fc_flag, kref_read(&ndlp->kref));
5750         return 0;
5751 }
5752
5753 /**
5754  * lpfc_els_rsp_reject - Prepare and issue a rjt response iocb command
5755  * @vport: pointer to a virtual N_Port data structure.
5756  * @rejectError: reject response to issue
5757  * @oldiocb: pointer to the original lpfc command iocb data structure.
5758  * @ndlp: pointer to a node-list data structure.
5759  * @mbox: pointer to the driver internal queue element for mailbox command.
5760  *
5761  * This routine prepares and issue an Reject (RJT) response IOCB
5762  * command. If a @mbox pointer is passed in, it will be put into the
5763  * context_un.mbox field of the IOCB for the completion callback function
5764  * to issue to the HBA later.
5765  *
5766  * Note that the ndlp reference count will be incremented by 1 for holding the
5767  * ndlp and the reference to ndlp will be stored into the ndlp field of
5768  * the IOCB for the completion callback function to the reject response
5769  * ELS IOCB command.
5770  *
5771  * Return code
5772  *   0 - Successfully issued reject response
5773  *   1 - Failed to issue reject response
5774  **/
5775 int
5776 lpfc_els_rsp_reject(struct lpfc_vport *vport, uint32_t rejectError,
5777                     struct lpfc_iocbq *oldiocb, struct lpfc_nodelist *ndlp,
5778                     LPFC_MBOXQ_t *mbox)
5779 {
5780         int rc;
5781         struct lpfc_hba  *phba = vport->phba;
5782         IOCB_t *icmd;
5783         IOCB_t *oldcmd;
5784         union lpfc_wqe128 *wqe;
5785         struct lpfc_iocbq *elsiocb;
5786         uint8_t *pcmd;
5787         uint16_t cmdsize;
5788
5789         cmdsize = 2 * sizeof(uint32_t);
5790         elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, oldiocb->retry, ndlp,
5791                                      ndlp->nlp_DID, ELS_CMD_LS_RJT);
5792         if (!elsiocb)
5793                 return 1;
5794
5795         if (phba->sli_rev == LPFC_SLI_REV4) {
5796                 wqe = &elsiocb->wqe;
5797                 bf_set(wqe_ctxt_tag, &wqe->generic.wqe_com,
5798                        get_job_ulpcontext(phba, oldiocb)); /* Xri / rx_id */
5799                 bf_set(wqe_rcvoxid, &wqe->xmit_els_rsp.wqe_com,
5800                        get_job_rcvoxid(phba, oldiocb));
5801         } else {
5802                 icmd = &elsiocb->iocb;
5803                 oldcmd = &oldiocb->iocb;
5804                 icmd->ulpContext = oldcmd->ulpContext; /* Xri / rx_id */
5805                 icmd->unsli3.rcvsli3.ox_id = oldcmd->unsli3.rcvsli3.ox_id;
5806         }
5807
5808         pcmd = (uint8_t *)elsiocb->cmd_dmabuf->virt;
5809
5810         *((uint32_t *) (pcmd)) = ELS_CMD_LS_RJT;
5811         pcmd += sizeof(uint32_t);
5812         *((uint32_t *) (pcmd)) = rejectError;
5813
5814         if (mbox)
5815                 elsiocb->context_un.mbox = mbox;
5816
5817         /* Xmit ELS RJT <err> response tag <ulpIoTag> */
5818         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
5819                          "0129 Xmit ELS RJT x%x response tag x%x "
5820                          "xri x%x, did x%x, nlp_flag x%x, nlp_state x%x, "
5821                          "rpi x%x\n",
5822                          rejectError, elsiocb->iotag,
5823                          get_job_ulpcontext(phba, elsiocb), ndlp->nlp_DID,
5824                          ndlp->nlp_flag, ndlp->nlp_state, ndlp->nlp_rpi);
5825         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
5826                 "Issue LS_RJT:    did:x%x flg:x%x err:x%x",
5827                 ndlp->nlp_DID, ndlp->nlp_flag, rejectError);
5828
5829         phba->fc_stat.elsXmitLSRJT++;
5830         elsiocb->cmd_cmpl = lpfc_cmpl_els_rsp;
5831         elsiocb->ndlp = lpfc_nlp_get(ndlp);
5832         if (!elsiocb->ndlp) {
5833                 lpfc_els_free_iocb(phba, elsiocb);
5834                 return 1;
5835         }
5836
5837         /* The NPIV instance is rejecting this unsolicited ELS. Make sure the
5838          * node's assigned RPI gets released provided this node is not already
5839          * registered with the transport.
5840          */
5841         if (phba->sli_rev == LPFC_SLI_REV4 &&
5842             vport->port_type == LPFC_NPIV_PORT &&
5843             !(ndlp->fc4_xpt_flags & SCSI_XPT_REGD)) {
5844                 spin_lock_irq(&ndlp->lock);
5845                 ndlp->nlp_flag |= NLP_RELEASE_RPI;
5846                 spin_unlock_irq(&ndlp->lock);
5847         }
5848
5849         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
5850         if (rc == IOCB_ERROR) {
5851                 lpfc_els_free_iocb(phba, elsiocb);
5852                 lpfc_nlp_put(ndlp);
5853                 return 1;
5854         }
5855
5856         return 0;
5857 }
5858
5859  /**
5860   * lpfc_issue_els_edc_rsp - Exchange Diagnostic Capabilities with the fabric.
5861   * @vport: pointer to a host virtual N_Port data structure.
5862   * @cmdiocb: pointer to the original lpfc command iocb data structure.
5863   * @ndlp: NPort to where rsp is directed
5864   *
5865   * This routine issues an EDC ACC RSP to the F-Port Controller to communicate
5866   * this N_Port's support of hardware signals in its Congestion
5867   * Capabilities Descriptor.
5868   *
5869   * Return code
5870   *   0 - Successfully issued edc rsp command
5871   *   1 - Failed to issue edc rsp command
5872   **/
5873 static int
5874 lpfc_issue_els_edc_rsp(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
5875                        struct lpfc_nodelist *ndlp)
5876 {
5877         struct lpfc_hba  *phba = vport->phba;
5878         struct fc_els_edc_resp *edc_rsp;
5879         struct fc_tlv_desc *tlv;
5880         struct lpfc_iocbq *elsiocb;
5881         IOCB_t *icmd, *cmd;
5882         union lpfc_wqe128 *wqe;
5883         u32 cgn_desc_size, lft_desc_size;
5884         u16 cmdsize;
5885         uint8_t *pcmd;
5886         int rc;
5887
5888         cmdsize = sizeof(struct fc_els_edc_resp);
5889         cgn_desc_size = sizeof(struct fc_diag_cg_sig_desc);
5890         lft_desc_size = (lpfc_link_is_lds_capable(phba)) ?
5891                                 sizeof(struct fc_diag_lnkflt_desc) : 0;
5892         cmdsize += cgn_desc_size + lft_desc_size;
5893         elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, cmdiocb->retry,
5894                                      ndlp, ndlp->nlp_DID, ELS_CMD_ACC);
5895         if (!elsiocb)
5896                 return 1;
5897
5898         if (phba->sli_rev == LPFC_SLI_REV4) {
5899                 wqe = &elsiocb->wqe;
5900                 bf_set(wqe_ctxt_tag, &wqe->generic.wqe_com,
5901                        get_job_ulpcontext(phba, cmdiocb)); /* Xri / rx_id */
5902                 bf_set(wqe_rcvoxid, &wqe->xmit_els_rsp.wqe_com,
5903                        get_job_rcvoxid(phba, cmdiocb));
5904         } else {
5905                 icmd = &elsiocb->iocb;
5906                 cmd = &cmdiocb->iocb;
5907                 icmd->ulpContext = cmd->ulpContext; /* Xri / rx_id */
5908                 icmd->unsli3.rcvsli3.ox_id = cmd->unsli3.rcvsli3.ox_id;
5909         }
5910
5911         pcmd = elsiocb->cmd_dmabuf->virt;
5912         memset(pcmd, 0, cmdsize);
5913
5914         edc_rsp = (struct fc_els_edc_resp *)pcmd;
5915         edc_rsp->acc_hdr.la_cmd = ELS_LS_ACC;
5916         edc_rsp->desc_list_len = cpu_to_be32(sizeof(struct fc_els_lsri_desc) +
5917                                                 cgn_desc_size + lft_desc_size);
5918         edc_rsp->lsri.desc_tag = cpu_to_be32(ELS_DTAG_LS_REQ_INFO);
5919         edc_rsp->lsri.desc_len = cpu_to_be32(
5920                 FC_TLV_DESC_LENGTH_FROM_SZ(struct fc_els_lsri_desc));
5921         edc_rsp->lsri.rqst_w0.cmd = ELS_EDC;
5922         tlv = edc_rsp->desc;
5923         lpfc_format_edc_cgn_desc(phba, tlv);
5924         tlv = fc_tlv_next_desc(tlv);
5925         if (lft_desc_size)
5926                 lpfc_format_edc_lft_desc(phba, tlv);
5927
5928         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
5929                               "Issue EDC ACC:      did:x%x flg:x%x refcnt %d",
5930                               ndlp->nlp_DID, ndlp->nlp_flag,
5931                               kref_read(&ndlp->kref));
5932         elsiocb->cmd_cmpl = lpfc_cmpl_els_rsp;
5933
5934         phba->fc_stat.elsXmitACC++;
5935         elsiocb->ndlp = lpfc_nlp_get(ndlp);
5936         if (!elsiocb->ndlp) {
5937                 lpfc_els_free_iocb(phba, elsiocb);
5938                 return 1;
5939         }
5940
5941         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
5942         if (rc == IOCB_ERROR) {
5943                 lpfc_els_free_iocb(phba, elsiocb);
5944                 lpfc_nlp_put(ndlp);
5945                 return 1;
5946         }
5947
5948         /* Xmit ELS ACC response tag <ulpIoTag> */
5949         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
5950                          "0152 Xmit EDC ACC response Status: x%x, IoTag: x%x, "
5951                          "XRI: x%x, DID: x%x, nlp_flag: x%x nlp_state: x%x "
5952                          "RPI: x%x, fc_flag x%x\n",
5953                          rc, elsiocb->iotag, elsiocb->sli4_xritag,
5954                          ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
5955                          ndlp->nlp_rpi, vport->fc_flag);
5956
5957         return 0;
5958 }
5959
5960 /**
5961  * lpfc_els_rsp_adisc_acc - Prepare and issue acc response to adisc iocb cmd
5962  * @vport: pointer to a virtual N_Port data structure.
5963  * @oldiocb: pointer to the original lpfc command iocb data structure.
5964  * @ndlp: pointer to a node-list data structure.
5965  *
5966  * This routine prepares and issues an Accept (ACC) response to Address
5967  * Discover (ADISC) ELS command. It simply prepares the payload of the IOCB
5968  * and invokes the lpfc_sli_issue_iocb() routine to send out the command.
5969  *
5970  * Note that the ndlp reference count will be incremented by 1 for holding the
5971  * ndlp and the reference to ndlp will be stored into the ndlp field of
5972  * the IOCB for the completion callback function to the ADISC Accept response
5973  * ELS IOCB command.
5974  *
5975  * Return code
5976  *   0 - Successfully issued acc adisc response
5977  *   1 - Failed to issue adisc acc response
5978  **/
5979 int
5980 lpfc_els_rsp_adisc_acc(struct lpfc_vport *vport, struct lpfc_iocbq *oldiocb,
5981                        struct lpfc_nodelist *ndlp)
5982 {
5983         struct lpfc_hba  *phba = vport->phba;
5984         ADISC *ap;
5985         IOCB_t *icmd, *oldcmd;
5986         union lpfc_wqe128 *wqe;
5987         struct lpfc_iocbq *elsiocb;
5988         uint8_t *pcmd;
5989         uint16_t cmdsize;
5990         int rc;
5991         u32 ulp_context;
5992
5993         cmdsize = sizeof(uint32_t) + sizeof(ADISC);
5994         elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, oldiocb->retry, ndlp,
5995                                      ndlp->nlp_DID, ELS_CMD_ACC);
5996         if (!elsiocb)
5997                 return 1;
5998
5999         if (phba->sli_rev == LPFC_SLI_REV4) {
6000                 wqe = &elsiocb->wqe;
6001                 /* XRI / rx_id */
6002                 bf_set(wqe_ctxt_tag, &wqe->generic.wqe_com,
6003                        get_job_ulpcontext(phba, oldiocb));
6004                 ulp_context = get_job_ulpcontext(phba, elsiocb);
6005                 /* oxid */
6006                 bf_set(wqe_rcvoxid, &wqe->xmit_els_rsp.wqe_com,
6007                        get_job_rcvoxid(phba, oldiocb));
6008         } else {
6009                 icmd = &elsiocb->iocb;
6010                 oldcmd = &oldiocb->iocb;
6011                 icmd->ulpContext = oldcmd->ulpContext; /* Xri / rx_id */
6012                 ulp_context = elsiocb->iocb.ulpContext;
6013                 icmd->unsli3.rcvsli3.ox_id =
6014                         oldcmd->unsli3.rcvsli3.ox_id;
6015         }
6016
6017         /* Xmit ADISC ACC response tag <ulpIoTag> */
6018         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
6019                          "0130 Xmit ADISC ACC response iotag x%x xri: "
6020                          "x%x, did x%x, nlp_flag x%x, nlp_state x%x rpi x%x\n",
6021                          elsiocb->iotag, ulp_context,
6022                          ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
6023                          ndlp->nlp_rpi);
6024         pcmd = (uint8_t *)elsiocb->cmd_dmabuf->virt;
6025
6026         *((uint32_t *) (pcmd)) = ELS_CMD_ACC;
6027         pcmd += sizeof(uint32_t);
6028
6029         ap = (ADISC *) (pcmd);
6030         ap->hardAL_PA = phba->fc_pref_ALPA;
6031         memcpy(&ap->portName, &vport->fc_portname, sizeof(struct lpfc_name));
6032         memcpy(&ap->nodeName, &vport->fc_nodename, sizeof(struct lpfc_name));
6033         ap->DID = be32_to_cpu(vport->fc_myDID);
6034
6035         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
6036                       "Issue ACC ADISC: did:x%x flg:x%x refcnt %d",
6037                       ndlp->nlp_DID, ndlp->nlp_flag, kref_read(&ndlp->kref));
6038
6039         phba->fc_stat.elsXmitACC++;
6040         elsiocb->cmd_cmpl = lpfc_cmpl_els_rsp;
6041         elsiocb->ndlp = lpfc_nlp_get(ndlp);
6042         if (!elsiocb->ndlp) {
6043                 lpfc_els_free_iocb(phba, elsiocb);
6044                 return 1;
6045         }
6046
6047         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
6048         if (rc == IOCB_ERROR) {
6049                 lpfc_els_free_iocb(phba, elsiocb);
6050                 lpfc_nlp_put(ndlp);
6051                 return 1;
6052         }
6053
6054         return 0;
6055 }
6056
6057 /**
6058  * lpfc_els_rsp_prli_acc - Prepare and issue acc response to prli iocb cmd
6059  * @vport: pointer to a virtual N_Port data structure.
6060  * @oldiocb: pointer to the original lpfc command iocb data structure.
6061  * @ndlp: pointer to a node-list data structure.
6062  *
6063  * This routine prepares and issues an Accept (ACC) response to Process
6064  * Login (PRLI) ELS command. It simply prepares the payload of the IOCB
6065  * and invokes the lpfc_sli_issue_iocb() routine to send out the command.
6066  *
6067  * Note that the ndlp reference count will be incremented by 1 for holding the
6068  * ndlp and the reference to ndlp will be stored into the ndlp field of
6069  * the IOCB for the completion callback function to the PRLI Accept response
6070  * ELS IOCB command.
6071  *
6072  * Return code
6073  *   0 - Successfully issued acc prli response
6074  *   1 - Failed to issue acc prli response
6075  **/
6076 int
6077 lpfc_els_rsp_prli_acc(struct lpfc_vport *vport, struct lpfc_iocbq *oldiocb,
6078                       struct lpfc_nodelist *ndlp)
6079 {
6080         struct lpfc_hba  *phba = vport->phba;
6081         PRLI *npr;
6082         struct lpfc_nvme_prli *npr_nvme;
6083         lpfc_vpd_t *vpd;
6084         IOCB_t *icmd;
6085         IOCB_t *oldcmd;
6086         union lpfc_wqe128 *wqe;
6087         struct lpfc_iocbq *elsiocb;
6088         uint8_t *pcmd;
6089         uint16_t cmdsize;
6090         uint32_t prli_fc4_req, *req_payload;
6091         struct lpfc_dmabuf *req_buf;
6092         int rc;
6093         u32 elsrspcmd, ulp_context;
6094
6095         /* Need the incoming PRLI payload to determine if the ACC is for an
6096          * FC4 or NVME PRLI type.  The PRLI type is at word 1.
6097          */
6098         req_buf = oldiocb->cmd_dmabuf;
6099         req_payload = (((uint32_t *)req_buf->virt) + 1);
6100
6101         /* PRLI type payload is at byte 3 for FCP or NVME. */
6102         prli_fc4_req = be32_to_cpu(*req_payload);
6103         prli_fc4_req = (prli_fc4_req >> 24) & 0xff;
6104         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
6105                          "6127 PRLI_ACC:  Req Type x%x, Word1 x%08x\n",
6106                          prli_fc4_req, *((uint32_t *)req_payload));
6107
6108         if (prli_fc4_req == PRLI_FCP_TYPE) {
6109                 cmdsize = sizeof(uint32_t) + sizeof(PRLI);
6110                 elsrspcmd = (ELS_CMD_ACC | (ELS_CMD_PRLI & ~ELS_RSP_MASK));
6111         } else if (prli_fc4_req == PRLI_NVME_TYPE) {
6112                 cmdsize = sizeof(uint32_t) + sizeof(struct lpfc_nvme_prli);
6113                 elsrspcmd = (ELS_CMD_ACC | (ELS_CMD_NVMEPRLI & ~ELS_RSP_MASK));
6114         } else {
6115                 return 1;
6116         }
6117
6118         elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, oldiocb->retry, ndlp,
6119                                      ndlp->nlp_DID, elsrspcmd);
6120         if (!elsiocb)
6121                 return 1;
6122
6123         if (phba->sli_rev == LPFC_SLI_REV4) {
6124                 wqe = &elsiocb->wqe;
6125                 bf_set(wqe_ctxt_tag, &wqe->generic.wqe_com,
6126                        get_job_ulpcontext(phba, oldiocb)); /* Xri / rx_id */
6127                 ulp_context = get_job_ulpcontext(phba, elsiocb);
6128                 bf_set(wqe_rcvoxid, &wqe->xmit_els_rsp.wqe_com,
6129                        get_job_rcvoxid(phba, oldiocb));
6130         } else {
6131                 icmd = &elsiocb->iocb;
6132                 oldcmd = &oldiocb->iocb;
6133                 icmd->ulpContext = oldcmd->ulpContext; /* Xri / rx_id */
6134                 ulp_context = elsiocb->iocb.ulpContext;
6135                 icmd->unsli3.rcvsli3.ox_id =
6136                         oldcmd->unsli3.rcvsli3.ox_id;
6137         }
6138
6139         /* Xmit PRLI ACC response tag <ulpIoTag> */
6140         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
6141                          "0131 Xmit PRLI ACC response tag x%x xri x%x, "
6142                          "did x%x, nlp_flag x%x, nlp_state x%x, rpi x%x\n",
6143                          elsiocb->iotag, ulp_context,
6144                          ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
6145                          ndlp->nlp_rpi);
6146         pcmd = (uint8_t *)elsiocb->cmd_dmabuf->virt;
6147         memset(pcmd, 0, cmdsize);
6148
6149         *((uint32_t *)(pcmd)) = elsrspcmd;
6150         pcmd += sizeof(uint32_t);
6151
6152         /* For PRLI, remainder of payload is PRLI parameter page */
6153         vpd = &phba->vpd;
6154
6155         if (prli_fc4_req == PRLI_FCP_TYPE) {
6156                 /*
6157                  * If the remote port is a target and our firmware version
6158                  * is 3.20 or later, set the following bits for FC-TAPE
6159                  * support.
6160                  */
6161                 npr = (PRLI *) pcmd;
6162                 if ((ndlp->nlp_type & NLP_FCP_TARGET) &&
6163                     (vpd->rev.feaLevelHigh >= 0x02)) {
6164                         npr->ConfmComplAllowed = 1;
6165                         npr->Retry = 1;
6166                         npr->TaskRetryIdReq = 1;
6167                 }
6168                 npr->acceptRspCode = PRLI_REQ_EXECUTED;
6169                 npr->estabImagePair = 1;
6170                 npr->readXferRdyDis = 1;
6171                 npr->ConfmComplAllowed = 1;
6172                 npr->prliType = PRLI_FCP_TYPE;
6173                 npr->initiatorFunc = 1;
6174         } else if (prli_fc4_req == PRLI_NVME_TYPE) {
6175                 /* Respond with an NVME PRLI Type */
6176                 npr_nvme = (struct lpfc_nvme_prli *) pcmd;
6177                 bf_set(prli_type_code, npr_nvme, PRLI_NVME_TYPE);
6178                 bf_set(prli_estabImagePair, npr_nvme, 0);  /* Should be 0 */
6179                 bf_set(prli_acc_rsp_code, npr_nvme, PRLI_REQ_EXECUTED);
6180                 if (phba->nvmet_support) {
6181                         bf_set(prli_tgt, npr_nvme, 1);
6182                         bf_set(prli_disc, npr_nvme, 1);
6183                         if (phba->cfg_nvme_enable_fb) {
6184                                 bf_set(prli_fba, npr_nvme, 1);
6185
6186                                 /* TBD.  Target mode needs to post buffers
6187                                  * that support the configured first burst
6188                                  * byte size.
6189                                  */
6190                                 bf_set(prli_fb_sz, npr_nvme,
6191                                        phba->cfg_nvmet_fb_size);
6192                         }
6193                 } else {
6194                         bf_set(prli_init, npr_nvme, 1);
6195                 }
6196
6197                 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC,
6198                                  "6015 NVME issue PRLI ACC word1 x%08x "
6199                                  "word4 x%08x word5 x%08x flag x%x, "
6200                                  "fcp_info x%x nlp_type x%x\n",
6201                                  npr_nvme->word1, npr_nvme->word4,
6202                                  npr_nvme->word5, ndlp->nlp_flag,
6203                                  ndlp->nlp_fcp_info, ndlp->nlp_type);
6204                 npr_nvme->word1 = cpu_to_be32(npr_nvme->word1);
6205                 npr_nvme->word4 = cpu_to_be32(npr_nvme->word4);
6206                 npr_nvme->word5 = cpu_to_be32(npr_nvme->word5);
6207         } else
6208                 lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
6209                                  "6128 Unknown FC_TYPE x%x x%x ndlp x%06x\n",
6210                                  prli_fc4_req, ndlp->nlp_fc4_type,
6211                                  ndlp->nlp_DID);
6212
6213         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
6214                       "Issue ACC PRLI:  did:x%x flg:x%x",
6215                       ndlp->nlp_DID, ndlp->nlp_flag, kref_read(&ndlp->kref));
6216
6217         phba->fc_stat.elsXmitACC++;
6218         elsiocb->cmd_cmpl = lpfc_cmpl_els_rsp;
6219         elsiocb->ndlp =  lpfc_nlp_get(ndlp);
6220         if (!elsiocb->ndlp) {
6221                 lpfc_els_free_iocb(phba, elsiocb);
6222                 return 1;
6223         }
6224
6225         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
6226         if (rc == IOCB_ERROR) {
6227                 lpfc_els_free_iocb(phba, elsiocb);
6228                 lpfc_nlp_put(ndlp);
6229                 return 1;
6230         }
6231
6232         return 0;
6233 }
6234
6235 /**
6236  * lpfc_els_rsp_rnid_acc - Issue rnid acc response iocb command
6237  * @vport: pointer to a virtual N_Port data structure.
6238  * @format: rnid command format.
6239  * @oldiocb: pointer to the original lpfc command iocb data structure.
6240  * @ndlp: pointer to a node-list data structure.
6241  *
6242  * This routine issues a Request Node Identification Data (RNID) Accept
6243  * (ACC) response. It constructs the RNID ACC response command according to
6244  * the proper @format and then calls the lpfc_sli_issue_iocb() routine to
6245  * issue the response.
6246  *
6247  * Note that the ndlp reference count will be incremented by 1 for holding the
6248  * ndlp and the reference to ndlp will be stored into the ndlp field of
6249  * the IOCB for the completion callback function.
6250  *
6251  * Return code
6252  *   0 - Successfully issued acc rnid response
6253  *   1 - Failed to issue acc rnid response
6254  **/
6255 static int
6256 lpfc_els_rsp_rnid_acc(struct lpfc_vport *vport, uint8_t format,
6257                       struct lpfc_iocbq *oldiocb, struct lpfc_nodelist *ndlp)
6258 {
6259         struct lpfc_hba  *phba = vport->phba;
6260         RNID *rn;
6261         IOCB_t *icmd, *oldcmd;
6262         union lpfc_wqe128 *wqe;
6263         struct lpfc_iocbq *elsiocb;
6264         uint8_t *pcmd;
6265         uint16_t cmdsize;
6266         int rc;
6267         u32 ulp_context;
6268
6269         cmdsize = sizeof(uint32_t) + sizeof(uint32_t)
6270                                         + (2 * sizeof(struct lpfc_name));
6271         if (format)
6272                 cmdsize += sizeof(RNID_TOP_DISC);
6273
6274         elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, oldiocb->retry, ndlp,
6275                                      ndlp->nlp_DID, ELS_CMD_ACC);
6276         if (!elsiocb)
6277                 return 1;
6278
6279         if (phba->sli_rev == LPFC_SLI_REV4) {
6280                 wqe = &elsiocb->wqe;
6281                 bf_set(wqe_ctxt_tag, &wqe->generic.wqe_com,
6282                        get_job_ulpcontext(phba, oldiocb)); /* Xri / rx_id */
6283                 ulp_context = get_job_ulpcontext(phba, elsiocb);
6284                 bf_set(wqe_rcvoxid, &wqe->xmit_els_rsp.wqe_com,
6285                        get_job_rcvoxid(phba, oldiocb));
6286         } else {
6287                 icmd = &elsiocb->iocb;
6288                 oldcmd = &oldiocb->iocb;
6289                 icmd->ulpContext = oldcmd->ulpContext; /* Xri / rx_id */
6290                 ulp_context = elsiocb->iocb.ulpContext;
6291                 icmd->unsli3.rcvsli3.ox_id =
6292                         oldcmd->unsli3.rcvsli3.ox_id;
6293         }
6294
6295         /* Xmit RNID ACC response tag <ulpIoTag> */
6296         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
6297                          "0132 Xmit RNID ACC response tag x%x xri x%x\n",
6298                          elsiocb->iotag, ulp_context);
6299         pcmd = (uint8_t *)elsiocb->cmd_dmabuf->virt;
6300         *((uint32_t *) (pcmd)) = ELS_CMD_ACC;
6301         pcmd += sizeof(uint32_t);
6302
6303         memset(pcmd, 0, sizeof(RNID));
6304         rn = (RNID *) (pcmd);
6305         rn->Format = format;
6306         rn->CommonLen = (2 * sizeof(struct lpfc_name));
6307         memcpy(&rn->portName, &vport->fc_portname, sizeof(struct lpfc_name));
6308         memcpy(&rn->nodeName, &vport->fc_nodename, sizeof(struct lpfc_name));
6309         switch (format) {
6310         case 0:
6311                 rn->SpecificLen = 0;
6312                 break;
6313         case RNID_TOPOLOGY_DISC:
6314                 rn->SpecificLen = sizeof(RNID_TOP_DISC);
6315                 memcpy(&rn->un.topologyDisc.portName,
6316                        &vport->fc_portname, sizeof(struct lpfc_name));
6317                 rn->un.topologyDisc.unitType = RNID_HBA;
6318                 rn->un.topologyDisc.physPort = 0;
6319                 rn->un.topologyDisc.attachedNodes = 0;
6320                 break;
6321         default:
6322                 rn->CommonLen = 0;
6323                 rn->SpecificLen = 0;
6324                 break;
6325         }
6326
6327         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
6328                       "Issue ACC RNID:  did:x%x flg:x%x refcnt %d",
6329                       ndlp->nlp_DID, ndlp->nlp_flag, kref_read(&ndlp->kref));
6330
6331         phba->fc_stat.elsXmitACC++;
6332         elsiocb->cmd_cmpl = lpfc_cmpl_els_rsp;
6333         elsiocb->ndlp = lpfc_nlp_get(ndlp);
6334         if (!elsiocb->ndlp) {
6335                 lpfc_els_free_iocb(phba, elsiocb);
6336                 return 1;
6337         }
6338
6339         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
6340         if (rc == IOCB_ERROR) {
6341                 lpfc_els_free_iocb(phba, elsiocb);
6342                 lpfc_nlp_put(ndlp);
6343                 return 1;
6344         }
6345
6346         return 0;
6347 }
6348
6349 /**
6350  * lpfc_els_clear_rrq - Clear the rq that this rrq describes.
6351  * @vport: pointer to a virtual N_Port data structure.
6352  * @iocb: pointer to the lpfc command iocb data structure.
6353  * @ndlp: pointer to a node-list data structure.
6354  *
6355  * Return
6356  **/
6357 static void
6358 lpfc_els_clear_rrq(struct lpfc_vport *vport,
6359                    struct lpfc_iocbq *iocb, struct lpfc_nodelist *ndlp)
6360 {
6361         struct lpfc_hba  *phba = vport->phba;
6362         uint8_t *pcmd;
6363         struct RRQ *rrq;
6364         uint16_t rxid;
6365         uint16_t xri;
6366         struct lpfc_node_rrq *prrq;
6367
6368
6369         pcmd = (uint8_t *)iocb->cmd_dmabuf->virt;
6370         pcmd += sizeof(uint32_t);
6371         rrq = (struct RRQ *)pcmd;
6372         rrq->rrq_exchg = be32_to_cpu(rrq->rrq_exchg);
6373         rxid = bf_get(rrq_rxid, rrq);
6374
6375         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
6376                         "2883 Clear RRQ for SID:x%x OXID:x%x RXID:x%x"
6377                         " x%x x%x\n",
6378                         be32_to_cpu(bf_get(rrq_did, rrq)),
6379                         bf_get(rrq_oxid, rrq),
6380                         rxid,
6381                         get_wqe_reqtag(iocb),
6382                         get_job_ulpcontext(phba, iocb));
6383
6384         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
6385                 "Clear RRQ:  did:x%x flg:x%x exchg:x%.08x",
6386                 ndlp->nlp_DID, ndlp->nlp_flag, rrq->rrq_exchg);
6387         if (vport->fc_myDID == be32_to_cpu(bf_get(rrq_did, rrq)))
6388                 xri = bf_get(rrq_oxid, rrq);
6389         else
6390                 xri = rxid;
6391         prrq = lpfc_get_active_rrq(vport, xri, ndlp->nlp_DID);
6392         if (prrq)
6393                 lpfc_clr_rrq_active(phba, xri, prrq);
6394         return;
6395 }
6396
6397 /**
6398  * lpfc_els_rsp_echo_acc - Issue echo acc response
6399  * @vport: pointer to a virtual N_Port data structure.
6400  * @data: pointer to echo data to return in the accept.
6401  * @oldiocb: pointer to the original lpfc command iocb data structure.
6402  * @ndlp: pointer to a node-list data structure.
6403  *
6404  * Return code
6405  *   0 - Successfully issued acc echo response
6406  *   1 - Failed to issue acc echo response
6407  **/
6408 static int
6409 lpfc_els_rsp_echo_acc(struct lpfc_vport *vport, uint8_t *data,
6410                       struct lpfc_iocbq *oldiocb, struct lpfc_nodelist *ndlp)
6411 {
6412         struct lpfc_hba  *phba = vport->phba;
6413         IOCB_t *icmd, *oldcmd;
6414         union lpfc_wqe128 *wqe;
6415         struct lpfc_iocbq *elsiocb;
6416         uint8_t *pcmd;
6417         uint16_t cmdsize;
6418         int rc;
6419         u32 ulp_context;
6420
6421         if (phba->sli_rev == LPFC_SLI_REV4)
6422                 cmdsize = oldiocb->wcqe_cmpl.total_data_placed;
6423         else
6424                 cmdsize = oldiocb->iocb.unsli3.rcvsli3.acc_len;
6425
6426         /* The accumulated length can exceed the BPL_SIZE.  For
6427          * now, use this as the limit
6428          */
6429         if (cmdsize > LPFC_BPL_SIZE)
6430                 cmdsize = LPFC_BPL_SIZE;
6431         elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, oldiocb->retry, ndlp,
6432                                      ndlp->nlp_DID, ELS_CMD_ACC);
6433         if (!elsiocb)
6434                 return 1;
6435
6436         if (phba->sli_rev == LPFC_SLI_REV4) {
6437                 wqe = &elsiocb->wqe;
6438                 bf_set(wqe_ctxt_tag, &wqe->generic.wqe_com,
6439                        get_job_ulpcontext(phba, oldiocb)); /* Xri / rx_id */
6440                 ulp_context = get_job_ulpcontext(phba, elsiocb);
6441                 bf_set(wqe_rcvoxid, &wqe->xmit_els_rsp.wqe_com,
6442                        get_job_rcvoxid(phba, oldiocb));
6443         } else {
6444                 icmd = &elsiocb->iocb;
6445                 oldcmd = &oldiocb->iocb;
6446                 icmd->ulpContext = oldcmd->ulpContext; /* Xri / rx_id */
6447                 ulp_context = elsiocb->iocb.ulpContext;
6448                 icmd->unsli3.rcvsli3.ox_id =
6449                         oldcmd->unsli3.rcvsli3.ox_id;
6450         }
6451
6452         /* Xmit ECHO ACC response tag <ulpIoTag> */
6453         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
6454                          "2876 Xmit ECHO ACC response tag x%x xri x%x\n",
6455                          elsiocb->iotag, ulp_context);
6456         pcmd = (uint8_t *)elsiocb->cmd_dmabuf->virt;
6457         *((uint32_t *) (pcmd)) = ELS_CMD_ACC;
6458         pcmd += sizeof(uint32_t);
6459         memcpy(pcmd, data, cmdsize - sizeof(uint32_t));
6460
6461         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
6462                       "Issue ACC ECHO:  did:x%x flg:x%x refcnt %d",
6463                       ndlp->nlp_DID, ndlp->nlp_flag, kref_read(&ndlp->kref));
6464
6465         phba->fc_stat.elsXmitACC++;
6466         elsiocb->cmd_cmpl = lpfc_cmpl_els_rsp;
6467         elsiocb->ndlp =  lpfc_nlp_get(ndlp);
6468         if (!elsiocb->ndlp) {
6469                 lpfc_els_free_iocb(phba, elsiocb);
6470                 return 1;
6471         }
6472
6473         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
6474         if (rc == IOCB_ERROR) {
6475                 lpfc_els_free_iocb(phba, elsiocb);
6476                 lpfc_nlp_put(ndlp);
6477                 return 1;
6478         }
6479
6480         return 0;
6481 }
6482
6483 /**
6484  * lpfc_els_disc_adisc - Issue remaining adisc iocbs to npr nodes of a vport
6485  * @vport: pointer to a host virtual N_Port data structure.
6486  *
6487  * This routine issues Address Discover (ADISC) ELS commands to those
6488  * N_Ports which are in node port recovery state and ADISC has not been issued
6489  * for the @vport. Each time an ELS ADISC IOCB is issued by invoking the
6490  * lpfc_issue_els_adisc() routine, the per @vport number of discover count
6491  * (num_disc_nodes) shall be incremented. If the num_disc_nodes reaches a
6492  * pre-configured threshold (cfg_discovery_threads), the @vport fc_flag will
6493  * be marked with FC_NLP_MORE bit and the process of issuing remaining ADISC
6494  * IOCBs quit for later pick up. On the other hand, after walking through
6495  * all the ndlps with the @vport and there is none ADISC IOCB issued, the
6496  * @vport fc_flag shall be cleared with FC_NLP_MORE bit indicating there is
6497  * no more ADISC need to be sent.
6498  *
6499  * Return code
6500  *    The number of N_Ports with adisc issued.
6501  **/
6502 int
6503 lpfc_els_disc_adisc(struct lpfc_vport *vport)
6504 {
6505         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
6506         struct lpfc_nodelist *ndlp, *next_ndlp;
6507         int sentadisc = 0;
6508
6509         /* go thru NPR nodes and issue any remaining ELS ADISCs */
6510         list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) {
6511
6512                 if (ndlp->nlp_state != NLP_STE_NPR_NODE ||
6513                     !(ndlp->nlp_flag & NLP_NPR_ADISC))
6514                         continue;
6515
6516                 spin_lock_irq(&ndlp->lock);
6517                 ndlp->nlp_flag &= ~NLP_NPR_ADISC;
6518                 spin_unlock_irq(&ndlp->lock);
6519
6520                 if (!(ndlp->nlp_flag & NLP_NPR_2B_DISC)) {
6521                         /* This node was marked for ADISC but was not picked
6522                          * for discovery. This is possible if the node was
6523                          * missing in gidft response.
6524                          *
6525                          * At time of marking node for ADISC, we skipped unreg
6526                          * from backend
6527                          */
6528                         lpfc_nlp_unreg_node(vport, ndlp);
6529                         lpfc_unreg_rpi(vport, ndlp);
6530                         continue;
6531                 }
6532
6533                 ndlp->nlp_prev_state = ndlp->nlp_state;
6534                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_ADISC_ISSUE);
6535                 lpfc_issue_els_adisc(vport, ndlp, 0);
6536                 sentadisc++;
6537                 vport->num_disc_nodes++;
6538                 if (vport->num_disc_nodes >=
6539                                 vport->cfg_discovery_threads) {
6540                         spin_lock_irq(shost->host_lock);
6541                         vport->fc_flag |= FC_NLP_MORE;
6542                         spin_unlock_irq(shost->host_lock);
6543                         break;
6544                 }
6545
6546         }
6547         if (sentadisc == 0) {
6548                 spin_lock_irq(shost->host_lock);
6549                 vport->fc_flag &= ~FC_NLP_MORE;
6550                 spin_unlock_irq(shost->host_lock);
6551         }
6552         return sentadisc;
6553 }
6554
6555 /**
6556  * lpfc_els_disc_plogi - Issue plogi for all npr nodes of a vport before adisc
6557  * @vport: pointer to a host virtual N_Port data structure.
6558  *
6559  * This routine issues Port Login (PLOGI) ELS commands to all the N_Ports
6560  * which are in node port recovery state, with a @vport. Each time an ELS
6561  * ADISC PLOGI IOCB is issued by invoking the lpfc_issue_els_plogi() routine,
6562  * the per @vport number of discover count (num_disc_nodes) shall be
6563  * incremented. If the num_disc_nodes reaches a pre-configured threshold
6564  * (cfg_discovery_threads), the @vport fc_flag will be marked with FC_NLP_MORE
6565  * bit set and quit the process of issuing remaining ADISC PLOGIN IOCBs for
6566  * later pick up. On the other hand, after walking through all the ndlps with
6567  * the @vport and there is none ADISC PLOGI IOCB issued, the @vport fc_flag
6568  * shall be cleared with the FC_NLP_MORE bit indicating there is no more ADISC
6569  * PLOGI need to be sent.
6570  *
6571  * Return code
6572  *   The number of N_Ports with plogi issued.
6573  **/
6574 int
6575 lpfc_els_disc_plogi(struct lpfc_vport *vport)
6576 {
6577         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
6578         struct lpfc_nodelist *ndlp, *next_ndlp;
6579         int sentplogi = 0;
6580
6581         /* go thru NPR nodes and issue any remaining ELS PLOGIs */
6582         list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) {
6583                 if (ndlp->nlp_state == NLP_STE_NPR_NODE &&
6584                                 (ndlp->nlp_flag & NLP_NPR_2B_DISC) != 0 &&
6585                                 (ndlp->nlp_flag & NLP_DELAY_TMO) == 0 &&
6586                                 (ndlp->nlp_flag & NLP_NPR_ADISC) == 0) {
6587                         ndlp->nlp_prev_state = ndlp->nlp_state;
6588                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
6589                         lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0);
6590                         sentplogi++;
6591                         vport->num_disc_nodes++;
6592                         if (vport->num_disc_nodes >=
6593                                         vport->cfg_discovery_threads) {
6594                                 spin_lock_irq(shost->host_lock);
6595                                 vport->fc_flag |= FC_NLP_MORE;
6596                                 spin_unlock_irq(shost->host_lock);
6597                                 break;
6598                         }
6599                 }
6600         }
6601
6602         lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
6603                          "6452 Discover PLOGI %d flag x%x\n",
6604                          sentplogi, vport->fc_flag);
6605
6606         if (sentplogi) {
6607                 lpfc_set_disctmo(vport);
6608         }
6609         else {
6610                 spin_lock_irq(shost->host_lock);
6611                 vport->fc_flag &= ~FC_NLP_MORE;
6612                 spin_unlock_irq(shost->host_lock);
6613         }
6614         return sentplogi;
6615 }
6616
6617 static uint32_t
6618 lpfc_rdp_res_link_service(struct fc_rdp_link_service_desc *desc,
6619                 uint32_t word0)
6620 {
6621
6622         desc->tag = cpu_to_be32(RDP_LINK_SERVICE_DESC_TAG);
6623         desc->payload.els_req = word0;
6624         desc->length = cpu_to_be32(sizeof(desc->payload));
6625
6626         return sizeof(struct fc_rdp_link_service_desc);
6627 }
6628
6629 static uint32_t
6630 lpfc_rdp_res_sfp_desc(struct fc_rdp_sfp_desc *desc,
6631                 uint8_t *page_a0, uint8_t *page_a2)
6632 {
6633         uint16_t wavelength;
6634         uint16_t temperature;
6635         uint16_t rx_power;
6636         uint16_t tx_bias;
6637         uint16_t tx_power;
6638         uint16_t vcc;
6639         uint16_t flag = 0;
6640         struct sff_trasnceiver_codes_byte4 *trasn_code_byte4;
6641         struct sff_trasnceiver_codes_byte5 *trasn_code_byte5;
6642
6643         desc->tag = cpu_to_be32(RDP_SFP_DESC_TAG);
6644
6645         trasn_code_byte4 = (struct sff_trasnceiver_codes_byte4 *)
6646                         &page_a0[SSF_TRANSCEIVER_CODE_B4];
6647         trasn_code_byte5 = (struct sff_trasnceiver_codes_byte5 *)
6648                         &page_a0[SSF_TRANSCEIVER_CODE_B5];
6649
6650         if ((trasn_code_byte4->fc_sw_laser) ||
6651             (trasn_code_byte5->fc_sw_laser_sl) ||
6652             (trasn_code_byte5->fc_sw_laser_sn)) {  /* check if its short WL */
6653                 flag |= (SFP_FLAG_PT_SWLASER << SFP_FLAG_PT_SHIFT);
6654         } else if (trasn_code_byte4->fc_lw_laser) {
6655                 wavelength = (page_a0[SSF_WAVELENGTH_B1] << 8) |
6656                         page_a0[SSF_WAVELENGTH_B0];
6657                 if (wavelength == SFP_WAVELENGTH_LC1310)
6658                         flag |= SFP_FLAG_PT_LWLASER_LC1310 << SFP_FLAG_PT_SHIFT;
6659                 if (wavelength == SFP_WAVELENGTH_LL1550)
6660                         flag |= SFP_FLAG_PT_LWLASER_LL1550 << SFP_FLAG_PT_SHIFT;
6661         }
6662         /* check if its SFP+ */
6663         flag |= ((page_a0[SSF_IDENTIFIER] == SFF_PG0_IDENT_SFP) ?
6664                         SFP_FLAG_CT_SFP_PLUS : SFP_FLAG_CT_UNKNOWN)
6665                                         << SFP_FLAG_CT_SHIFT;
6666
6667         /* check if its OPTICAL */
6668         flag |= ((page_a0[SSF_CONNECTOR] == SFF_PG0_CONNECTOR_LC) ?
6669                         SFP_FLAG_IS_OPTICAL_PORT : 0)
6670                                         << SFP_FLAG_IS_OPTICAL_SHIFT;
6671
6672         temperature = (page_a2[SFF_TEMPERATURE_B1] << 8 |
6673                 page_a2[SFF_TEMPERATURE_B0]);
6674         vcc = (page_a2[SFF_VCC_B1] << 8 |
6675                 page_a2[SFF_VCC_B0]);
6676         tx_power = (page_a2[SFF_TXPOWER_B1] << 8 |
6677                 page_a2[SFF_TXPOWER_B0]);
6678         tx_bias = (page_a2[SFF_TX_BIAS_CURRENT_B1] << 8 |
6679                 page_a2[SFF_TX_BIAS_CURRENT_B0]);
6680         rx_power = (page_a2[SFF_RXPOWER_B1] << 8 |
6681                 page_a2[SFF_RXPOWER_B0]);
6682         desc->sfp_info.temperature = cpu_to_be16(temperature);
6683         desc->sfp_info.rx_power = cpu_to_be16(rx_power);
6684         desc->sfp_info.tx_bias = cpu_to_be16(tx_bias);
6685         desc->sfp_info.tx_power = cpu_to_be16(tx_power);
6686         desc->sfp_info.vcc = cpu_to_be16(vcc);
6687
6688         desc->sfp_info.flags = cpu_to_be16(flag);
6689         desc->length = cpu_to_be32(sizeof(desc->sfp_info));
6690
6691         return sizeof(struct fc_rdp_sfp_desc);
6692 }
6693
6694 static uint32_t
6695 lpfc_rdp_res_link_error(struct fc_rdp_link_error_status_desc *desc,
6696                 READ_LNK_VAR *stat)
6697 {
6698         uint32_t type;
6699
6700         desc->tag = cpu_to_be32(RDP_LINK_ERROR_STATUS_DESC_TAG);
6701
6702         type = VN_PT_PHY_PF_PORT << VN_PT_PHY_SHIFT;
6703
6704         desc->info.port_type = cpu_to_be32(type);
6705
6706         desc->info.link_status.link_failure_cnt =
6707                 cpu_to_be32(stat->linkFailureCnt);
6708         desc->info.link_status.loss_of_synch_cnt =
6709                 cpu_to_be32(stat->lossSyncCnt);
6710         desc->info.link_status.loss_of_signal_cnt =
6711                 cpu_to_be32(stat->lossSignalCnt);
6712         desc->info.link_status.primitive_seq_proto_err =
6713                 cpu_to_be32(stat->primSeqErrCnt);
6714         desc->info.link_status.invalid_trans_word =
6715                 cpu_to_be32(stat->invalidXmitWord);
6716         desc->info.link_status.invalid_crc_cnt = cpu_to_be32(stat->crcCnt);
6717
6718         desc->length = cpu_to_be32(sizeof(desc->info));
6719
6720         return sizeof(struct fc_rdp_link_error_status_desc);
6721 }
6722
6723 static uint32_t
6724 lpfc_rdp_res_bbc_desc(struct fc_rdp_bbc_desc *desc, READ_LNK_VAR *stat,
6725                       struct lpfc_vport *vport)
6726 {
6727         uint32_t bbCredit;
6728
6729         desc->tag = cpu_to_be32(RDP_BBC_DESC_TAG);
6730
6731         bbCredit = vport->fc_sparam.cmn.bbCreditLsb |
6732                         (vport->fc_sparam.cmn.bbCreditMsb << 8);
6733         desc->bbc_info.port_bbc = cpu_to_be32(bbCredit);
6734         if (vport->phba->fc_topology != LPFC_TOPOLOGY_LOOP) {
6735                 bbCredit = vport->phba->fc_fabparam.cmn.bbCreditLsb |
6736                         (vport->phba->fc_fabparam.cmn.bbCreditMsb << 8);
6737                 desc->bbc_info.attached_port_bbc = cpu_to_be32(bbCredit);
6738         } else {
6739                 desc->bbc_info.attached_port_bbc = 0;
6740         }
6741
6742         desc->bbc_info.rtt = 0;
6743         desc->length = cpu_to_be32(sizeof(desc->bbc_info));
6744
6745         return sizeof(struct fc_rdp_bbc_desc);
6746 }
6747
6748 static uint32_t
6749 lpfc_rdp_res_oed_temp_desc(struct lpfc_hba *phba,
6750                            struct fc_rdp_oed_sfp_desc *desc, uint8_t *page_a2)
6751 {
6752         uint32_t flags = 0;
6753
6754         desc->tag = cpu_to_be32(RDP_OED_DESC_TAG);
6755
6756         desc->oed_info.hi_alarm = page_a2[SSF_TEMP_HIGH_ALARM];
6757         desc->oed_info.lo_alarm = page_a2[SSF_TEMP_LOW_ALARM];
6758         desc->oed_info.hi_warning = page_a2[SSF_TEMP_HIGH_WARNING];
6759         desc->oed_info.lo_warning = page_a2[SSF_TEMP_LOW_WARNING];
6760
6761         if (phba->sfp_alarm & LPFC_TRANSGRESSION_HIGH_TEMPERATURE)
6762                 flags |= RDP_OET_HIGH_ALARM;
6763         if (phba->sfp_alarm & LPFC_TRANSGRESSION_LOW_TEMPERATURE)
6764                 flags |= RDP_OET_LOW_ALARM;
6765         if (phba->sfp_warning & LPFC_TRANSGRESSION_HIGH_TEMPERATURE)
6766                 flags |= RDP_OET_HIGH_WARNING;
6767         if (phba->sfp_warning & LPFC_TRANSGRESSION_LOW_TEMPERATURE)
6768                 flags |= RDP_OET_LOW_WARNING;
6769
6770         flags |= ((0xf & RDP_OED_TEMPERATURE) << RDP_OED_TYPE_SHIFT);
6771         desc->oed_info.function_flags = cpu_to_be32(flags);
6772         desc->length = cpu_to_be32(sizeof(desc->oed_info));
6773         return sizeof(struct fc_rdp_oed_sfp_desc);
6774 }
6775
6776 static uint32_t
6777 lpfc_rdp_res_oed_voltage_desc(struct lpfc_hba *phba,
6778                               struct fc_rdp_oed_sfp_desc *desc,
6779                               uint8_t *page_a2)
6780 {
6781         uint32_t flags = 0;
6782
6783         desc->tag = cpu_to_be32(RDP_OED_DESC_TAG);
6784
6785         desc->oed_info.hi_alarm = page_a2[SSF_VOLTAGE_HIGH_ALARM];
6786         desc->oed_info.lo_alarm = page_a2[SSF_VOLTAGE_LOW_ALARM];
6787         desc->oed_info.hi_warning = page_a2[SSF_VOLTAGE_HIGH_WARNING];
6788         desc->oed_info.lo_warning = page_a2[SSF_VOLTAGE_LOW_WARNING];
6789
6790         if (phba->sfp_alarm & LPFC_TRANSGRESSION_HIGH_VOLTAGE)
6791                 flags |= RDP_OET_HIGH_ALARM;
6792         if (phba->sfp_alarm & LPFC_TRANSGRESSION_LOW_VOLTAGE)
6793                 flags |= RDP_OET_LOW_ALARM;
6794         if (phba->sfp_warning & LPFC_TRANSGRESSION_HIGH_VOLTAGE)
6795                 flags |= RDP_OET_HIGH_WARNING;
6796         if (phba->sfp_warning & LPFC_TRANSGRESSION_LOW_VOLTAGE)
6797                 flags |= RDP_OET_LOW_WARNING;
6798
6799         flags |= ((0xf & RDP_OED_VOLTAGE) << RDP_OED_TYPE_SHIFT);
6800         desc->oed_info.function_flags = cpu_to_be32(flags);
6801         desc->length = cpu_to_be32(sizeof(desc->oed_info));
6802         return sizeof(struct fc_rdp_oed_sfp_desc);
6803 }
6804
6805 static uint32_t
6806 lpfc_rdp_res_oed_txbias_desc(struct lpfc_hba *phba,
6807                              struct fc_rdp_oed_sfp_desc *desc,
6808                              uint8_t *page_a2)
6809 {
6810         uint32_t flags = 0;
6811
6812         desc->tag = cpu_to_be32(RDP_OED_DESC_TAG);
6813
6814         desc->oed_info.hi_alarm = page_a2[SSF_BIAS_HIGH_ALARM];
6815         desc->oed_info.lo_alarm = page_a2[SSF_BIAS_LOW_ALARM];
6816         desc->oed_info.hi_warning = page_a2[SSF_BIAS_HIGH_WARNING];
6817         desc->oed_info.lo_warning = page_a2[SSF_BIAS_LOW_WARNING];
6818
6819         if (phba->sfp_alarm & LPFC_TRANSGRESSION_HIGH_TXBIAS)
6820                 flags |= RDP_OET_HIGH_ALARM;
6821         if (phba->sfp_alarm & LPFC_TRANSGRESSION_LOW_TXBIAS)
6822                 flags |= RDP_OET_LOW_ALARM;
6823         if (phba->sfp_warning & LPFC_TRANSGRESSION_HIGH_TXBIAS)
6824                 flags |= RDP_OET_HIGH_WARNING;
6825         if (phba->sfp_warning & LPFC_TRANSGRESSION_LOW_TXBIAS)
6826                 flags |= RDP_OET_LOW_WARNING;
6827
6828         flags |= ((0xf & RDP_OED_TXBIAS) << RDP_OED_TYPE_SHIFT);
6829         desc->oed_info.function_flags = cpu_to_be32(flags);
6830         desc->length = cpu_to_be32(sizeof(desc->oed_info));
6831         return sizeof(struct fc_rdp_oed_sfp_desc);
6832 }
6833
6834 static uint32_t
6835 lpfc_rdp_res_oed_txpower_desc(struct lpfc_hba *phba,
6836                               struct fc_rdp_oed_sfp_desc *desc,
6837                               uint8_t *page_a2)
6838 {
6839         uint32_t flags = 0;
6840
6841         desc->tag = cpu_to_be32(RDP_OED_DESC_TAG);
6842
6843         desc->oed_info.hi_alarm = page_a2[SSF_TXPOWER_HIGH_ALARM];
6844         desc->oed_info.lo_alarm = page_a2[SSF_TXPOWER_LOW_ALARM];
6845         desc->oed_info.hi_warning = page_a2[SSF_TXPOWER_HIGH_WARNING];
6846         desc->oed_info.lo_warning = page_a2[SSF_TXPOWER_LOW_WARNING];
6847
6848         if (phba->sfp_alarm & LPFC_TRANSGRESSION_HIGH_TXPOWER)
6849                 flags |= RDP_OET_HIGH_ALARM;
6850         if (phba->sfp_alarm & LPFC_TRANSGRESSION_LOW_TXPOWER)
6851                 flags |= RDP_OET_LOW_ALARM;
6852         if (phba->sfp_warning & LPFC_TRANSGRESSION_HIGH_TXPOWER)
6853                 flags |= RDP_OET_HIGH_WARNING;
6854         if (phba->sfp_warning & LPFC_TRANSGRESSION_LOW_TXPOWER)
6855                 flags |= RDP_OET_LOW_WARNING;
6856
6857         flags |= ((0xf & RDP_OED_TXPOWER) << RDP_OED_TYPE_SHIFT);
6858         desc->oed_info.function_flags = cpu_to_be32(flags);
6859         desc->length = cpu_to_be32(sizeof(desc->oed_info));
6860         return sizeof(struct fc_rdp_oed_sfp_desc);
6861 }
6862
6863
6864 static uint32_t
6865 lpfc_rdp_res_oed_rxpower_desc(struct lpfc_hba *phba,
6866                               struct fc_rdp_oed_sfp_desc *desc,
6867                               uint8_t *page_a2)
6868 {
6869         uint32_t flags = 0;
6870
6871         desc->tag = cpu_to_be32(RDP_OED_DESC_TAG);
6872
6873         desc->oed_info.hi_alarm = page_a2[SSF_RXPOWER_HIGH_ALARM];
6874         desc->oed_info.lo_alarm = page_a2[SSF_RXPOWER_LOW_ALARM];
6875         desc->oed_info.hi_warning = page_a2[SSF_RXPOWER_HIGH_WARNING];
6876         desc->oed_info.lo_warning = page_a2[SSF_RXPOWER_LOW_WARNING];
6877
6878         if (phba->sfp_alarm & LPFC_TRANSGRESSION_HIGH_RXPOWER)
6879                 flags |= RDP_OET_HIGH_ALARM;
6880         if (phba->sfp_alarm & LPFC_TRANSGRESSION_LOW_RXPOWER)
6881                 flags |= RDP_OET_LOW_ALARM;
6882         if (phba->sfp_warning & LPFC_TRANSGRESSION_HIGH_RXPOWER)
6883                 flags |= RDP_OET_HIGH_WARNING;
6884         if (phba->sfp_warning & LPFC_TRANSGRESSION_LOW_RXPOWER)
6885                 flags |= RDP_OET_LOW_WARNING;
6886
6887         flags |= ((0xf & RDP_OED_RXPOWER) << RDP_OED_TYPE_SHIFT);
6888         desc->oed_info.function_flags = cpu_to_be32(flags);
6889         desc->length = cpu_to_be32(sizeof(desc->oed_info));
6890         return sizeof(struct fc_rdp_oed_sfp_desc);
6891 }
6892
6893 static uint32_t
6894 lpfc_rdp_res_opd_desc(struct fc_rdp_opd_sfp_desc *desc,
6895                       uint8_t *page_a0, struct lpfc_vport *vport)
6896 {
6897         desc->tag = cpu_to_be32(RDP_OPD_DESC_TAG);
6898         memcpy(desc->opd_info.vendor_name, &page_a0[SSF_VENDOR_NAME], 16);
6899         memcpy(desc->opd_info.model_number, &page_a0[SSF_VENDOR_PN], 16);
6900         memcpy(desc->opd_info.serial_number, &page_a0[SSF_VENDOR_SN], 16);
6901         memcpy(desc->opd_info.revision, &page_a0[SSF_VENDOR_REV], 4);
6902         memcpy(desc->opd_info.date, &page_a0[SSF_DATE_CODE], 8);
6903         desc->length = cpu_to_be32(sizeof(desc->opd_info));
6904         return sizeof(struct fc_rdp_opd_sfp_desc);
6905 }
6906
6907 static uint32_t
6908 lpfc_rdp_res_fec_desc(struct fc_fec_rdp_desc *desc, READ_LNK_VAR *stat)
6909 {
6910         if (bf_get(lpfc_read_link_stat_gec2, stat) == 0)
6911                 return 0;
6912         desc->tag = cpu_to_be32(RDP_FEC_DESC_TAG);
6913
6914         desc->info.CorrectedBlocks =
6915                 cpu_to_be32(stat->fecCorrBlkCount);
6916         desc->info.UncorrectableBlocks =
6917                 cpu_to_be32(stat->fecUncorrBlkCount);
6918
6919         desc->length = cpu_to_be32(sizeof(desc->info));
6920
6921         return sizeof(struct fc_fec_rdp_desc);
6922 }
6923
6924 static uint32_t
6925 lpfc_rdp_res_speed(struct fc_rdp_port_speed_desc *desc, struct lpfc_hba *phba)
6926 {
6927         uint16_t rdp_cap = 0;
6928         uint16_t rdp_speed;
6929
6930         desc->tag = cpu_to_be32(RDP_PORT_SPEED_DESC_TAG);
6931
6932         switch (phba->fc_linkspeed) {
6933         case LPFC_LINK_SPEED_1GHZ:
6934                 rdp_speed = RDP_PS_1GB;
6935                 break;
6936         case LPFC_LINK_SPEED_2GHZ:
6937                 rdp_speed = RDP_PS_2GB;
6938                 break;
6939         case LPFC_LINK_SPEED_4GHZ:
6940                 rdp_speed = RDP_PS_4GB;
6941                 break;
6942         case LPFC_LINK_SPEED_8GHZ:
6943                 rdp_speed = RDP_PS_8GB;
6944                 break;
6945         case LPFC_LINK_SPEED_10GHZ:
6946                 rdp_speed = RDP_PS_10GB;
6947                 break;
6948         case LPFC_LINK_SPEED_16GHZ:
6949                 rdp_speed = RDP_PS_16GB;
6950                 break;
6951         case LPFC_LINK_SPEED_32GHZ:
6952                 rdp_speed = RDP_PS_32GB;
6953                 break;
6954         case LPFC_LINK_SPEED_64GHZ:
6955                 rdp_speed = RDP_PS_64GB;
6956                 break;
6957         case LPFC_LINK_SPEED_128GHZ:
6958                 rdp_speed = RDP_PS_128GB;
6959                 break;
6960         case LPFC_LINK_SPEED_256GHZ:
6961                 rdp_speed = RDP_PS_256GB;
6962                 break;
6963         default:
6964                 rdp_speed = RDP_PS_UNKNOWN;
6965                 break;
6966         }
6967
6968         desc->info.port_speed.speed = cpu_to_be16(rdp_speed);
6969
6970         if (phba->lmt & LMT_256Gb)
6971                 rdp_cap |= RDP_PS_256GB;
6972         if (phba->lmt & LMT_128Gb)
6973                 rdp_cap |= RDP_PS_128GB;
6974         if (phba->lmt & LMT_64Gb)
6975                 rdp_cap |= RDP_PS_64GB;
6976         if (phba->lmt & LMT_32Gb)
6977                 rdp_cap |= RDP_PS_32GB;
6978         if (phba->lmt & LMT_16Gb)
6979                 rdp_cap |= RDP_PS_16GB;
6980         if (phba->lmt & LMT_10Gb)
6981                 rdp_cap |= RDP_PS_10GB;
6982         if (phba->lmt & LMT_8Gb)
6983                 rdp_cap |= RDP_PS_8GB;
6984         if (phba->lmt & LMT_4Gb)
6985                 rdp_cap |= RDP_PS_4GB;
6986         if (phba->lmt & LMT_2Gb)
6987                 rdp_cap |= RDP_PS_2GB;
6988         if (phba->lmt & LMT_1Gb)
6989                 rdp_cap |= RDP_PS_1GB;
6990
6991         if (rdp_cap == 0)
6992                 rdp_cap = RDP_CAP_UNKNOWN;
6993         if (phba->cfg_link_speed != LPFC_USER_LINK_SPEED_AUTO)
6994                 rdp_cap |= RDP_CAP_USER_CONFIGURED;
6995
6996         desc->info.port_speed.capabilities = cpu_to_be16(rdp_cap);
6997         desc->length = cpu_to_be32(sizeof(desc->info));
6998         return sizeof(struct fc_rdp_port_speed_desc);
6999 }
7000
7001 static uint32_t
7002 lpfc_rdp_res_diag_port_names(struct fc_rdp_port_name_desc *desc,
7003                 struct lpfc_vport *vport)
7004 {
7005
7006         desc->tag = cpu_to_be32(RDP_PORT_NAMES_DESC_TAG);
7007
7008         memcpy(desc->port_names.wwnn, &vport->fc_nodename,
7009                         sizeof(desc->port_names.wwnn));
7010
7011         memcpy(desc->port_names.wwpn, &vport->fc_portname,
7012                         sizeof(desc->port_names.wwpn));
7013
7014         desc->length = cpu_to_be32(sizeof(desc->port_names));
7015         return sizeof(struct fc_rdp_port_name_desc);
7016 }
7017
7018 static uint32_t
7019 lpfc_rdp_res_attach_port_names(struct fc_rdp_port_name_desc *desc,
7020                 struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
7021 {
7022
7023         desc->tag = cpu_to_be32(RDP_PORT_NAMES_DESC_TAG);
7024         if (vport->fc_flag & FC_FABRIC) {
7025                 memcpy(desc->port_names.wwnn, &vport->fabric_nodename,
7026                        sizeof(desc->port_names.wwnn));
7027
7028                 memcpy(desc->port_names.wwpn, &vport->fabric_portname,
7029                        sizeof(desc->port_names.wwpn));
7030         } else {  /* Point to Point */
7031                 memcpy(desc->port_names.wwnn, &ndlp->nlp_nodename,
7032                        sizeof(desc->port_names.wwnn));
7033
7034                 memcpy(desc->port_names.wwpn, &ndlp->nlp_portname,
7035                        sizeof(desc->port_names.wwpn));
7036         }
7037
7038         desc->length = cpu_to_be32(sizeof(desc->port_names));
7039         return sizeof(struct fc_rdp_port_name_desc);
7040 }
7041
7042 static void
7043 lpfc_els_rdp_cmpl(struct lpfc_hba *phba, struct lpfc_rdp_context *rdp_context,
7044                 int status)
7045 {
7046         struct lpfc_nodelist *ndlp = rdp_context->ndlp;
7047         struct lpfc_vport *vport = ndlp->vport;
7048         struct lpfc_iocbq *elsiocb;
7049         struct ulp_bde64 *bpl;
7050         IOCB_t *icmd;
7051         union lpfc_wqe128 *wqe;
7052         uint8_t *pcmd;
7053         struct ls_rjt *stat;
7054         struct fc_rdp_res_frame *rdp_res;
7055         uint32_t cmdsize, len;
7056         uint16_t *flag_ptr;
7057         int rc;
7058         u32 ulp_context;
7059
7060         if (status != SUCCESS)
7061                 goto error;
7062
7063         /* This will change once we know the true size of the RDP payload */
7064         cmdsize = sizeof(struct fc_rdp_res_frame);
7065
7066         elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize,
7067                                 lpfc_max_els_tries, rdp_context->ndlp,
7068                                 rdp_context->ndlp->nlp_DID, ELS_CMD_ACC);
7069         if (!elsiocb)
7070                 goto free_rdp_context;
7071
7072         ulp_context = get_job_ulpcontext(phba, elsiocb);
7073         if (phba->sli_rev == LPFC_SLI_REV4) {
7074                 wqe = &elsiocb->wqe;
7075                 /* ox-id of the frame */
7076                 bf_set(wqe_rcvoxid, &wqe->xmit_els_rsp.wqe_com,
7077                        rdp_context->ox_id);
7078                 bf_set(wqe_ctxt_tag, &wqe->xmit_els_rsp.wqe_com,
7079                        rdp_context->rx_id);
7080         } else {
7081                 icmd = &elsiocb->iocb;
7082                 icmd->ulpContext = rdp_context->rx_id;
7083                 icmd->unsli3.rcvsli3.ox_id = rdp_context->ox_id;
7084         }
7085
7086         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
7087                         "2171 Xmit RDP response tag x%x xri x%x, "
7088                         "did x%x, nlp_flag x%x, nlp_state x%x, rpi x%x",
7089                         elsiocb->iotag, ulp_context,
7090                         ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
7091                         ndlp->nlp_rpi);
7092         rdp_res = (struct fc_rdp_res_frame *)elsiocb->cmd_dmabuf->virt;
7093         pcmd = (uint8_t *)elsiocb->cmd_dmabuf->virt;
7094         memset(pcmd, 0, sizeof(struct fc_rdp_res_frame));
7095         *((uint32_t *) (pcmd)) = ELS_CMD_ACC;
7096
7097         /* Update Alarm and Warning */
7098         flag_ptr = (uint16_t *)(rdp_context->page_a2 + SSF_ALARM_FLAGS);
7099         phba->sfp_alarm |= *flag_ptr;
7100         flag_ptr = (uint16_t *)(rdp_context->page_a2 + SSF_WARNING_FLAGS);
7101         phba->sfp_warning |= *flag_ptr;
7102
7103         /* For RDP payload */
7104         len = 8;
7105         len += lpfc_rdp_res_link_service((struct fc_rdp_link_service_desc *)
7106                                          (len + pcmd), ELS_CMD_RDP);
7107
7108         len += lpfc_rdp_res_sfp_desc((struct fc_rdp_sfp_desc *)(len + pcmd),
7109                         rdp_context->page_a0, rdp_context->page_a2);
7110         len += lpfc_rdp_res_speed((struct fc_rdp_port_speed_desc *)(len + pcmd),
7111                                   phba);
7112         len += lpfc_rdp_res_link_error((struct fc_rdp_link_error_status_desc *)
7113                                        (len + pcmd), &rdp_context->link_stat);
7114         len += lpfc_rdp_res_diag_port_names((struct fc_rdp_port_name_desc *)
7115                                              (len + pcmd), vport);
7116         len += lpfc_rdp_res_attach_port_names((struct fc_rdp_port_name_desc *)
7117                                         (len + pcmd), vport, ndlp);
7118         len += lpfc_rdp_res_fec_desc((struct fc_fec_rdp_desc *)(len + pcmd),
7119                         &rdp_context->link_stat);
7120         len += lpfc_rdp_res_bbc_desc((struct fc_rdp_bbc_desc *)(len + pcmd),
7121                                      &rdp_context->link_stat, vport);
7122         len += lpfc_rdp_res_oed_temp_desc(phba,
7123                                 (struct fc_rdp_oed_sfp_desc *)(len + pcmd),
7124                                 rdp_context->page_a2);
7125         len += lpfc_rdp_res_oed_voltage_desc(phba,
7126                                 (struct fc_rdp_oed_sfp_desc *)(len + pcmd),
7127                                 rdp_context->page_a2);
7128         len += lpfc_rdp_res_oed_txbias_desc(phba,
7129                                 (struct fc_rdp_oed_sfp_desc *)(len + pcmd),
7130                                 rdp_context->page_a2);
7131         len += lpfc_rdp_res_oed_txpower_desc(phba,
7132                                 (struct fc_rdp_oed_sfp_desc *)(len + pcmd),
7133                                 rdp_context->page_a2);
7134         len += lpfc_rdp_res_oed_rxpower_desc(phba,
7135                                 (struct fc_rdp_oed_sfp_desc *)(len + pcmd),
7136                                 rdp_context->page_a2);
7137         len += lpfc_rdp_res_opd_desc((struct fc_rdp_opd_sfp_desc *)(len + pcmd),
7138                                      rdp_context->page_a0, vport);
7139
7140         rdp_res->length = cpu_to_be32(len - 8);
7141         elsiocb->cmd_cmpl = lpfc_cmpl_els_rsp;
7142
7143         /* Now that we know the true size of the payload, update the BPL */
7144         bpl = (struct ulp_bde64 *)elsiocb->bpl_dmabuf->virt;
7145         bpl->tus.f.bdeSize = len;
7146         bpl->tus.f.bdeFlags = 0;
7147         bpl->tus.w = le32_to_cpu(bpl->tus.w);
7148
7149         phba->fc_stat.elsXmitACC++;
7150         elsiocb->ndlp = lpfc_nlp_get(ndlp);
7151         if (!elsiocb->ndlp) {
7152                 lpfc_els_free_iocb(phba, elsiocb);
7153                 goto free_rdp_context;
7154         }
7155
7156         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
7157         if (rc == IOCB_ERROR) {
7158                 lpfc_els_free_iocb(phba, elsiocb);
7159                 lpfc_nlp_put(ndlp);
7160         }
7161
7162         goto free_rdp_context;
7163
7164 error:
7165         cmdsize = 2 * sizeof(uint32_t);
7166         elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, lpfc_max_els_tries,
7167                         ndlp, ndlp->nlp_DID, ELS_CMD_LS_RJT);
7168         if (!elsiocb)
7169                 goto free_rdp_context;
7170
7171         if (phba->sli_rev == LPFC_SLI_REV4) {
7172                 wqe = &elsiocb->wqe;
7173                 /* ox-id of the frame */
7174                 bf_set(wqe_rcvoxid, &wqe->xmit_els_rsp.wqe_com,
7175                        rdp_context->ox_id);
7176                 bf_set(wqe_ctxt_tag,
7177                        &wqe->xmit_els_rsp.wqe_com,
7178                        rdp_context->rx_id);
7179         } else {
7180                 icmd = &elsiocb->iocb;
7181                 icmd->ulpContext = rdp_context->rx_id;
7182                 icmd->unsli3.rcvsli3.ox_id = rdp_context->ox_id;
7183         }
7184
7185         pcmd = (uint8_t *)elsiocb->cmd_dmabuf->virt;
7186
7187         *((uint32_t *) (pcmd)) = ELS_CMD_LS_RJT;
7188         stat = (struct ls_rjt *)(pcmd + sizeof(uint32_t));
7189         stat->un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
7190
7191         phba->fc_stat.elsXmitLSRJT++;
7192         elsiocb->cmd_cmpl = lpfc_cmpl_els_rsp;
7193         elsiocb->ndlp = lpfc_nlp_get(ndlp);
7194         if (!elsiocb->ndlp) {
7195                 lpfc_els_free_iocb(phba, elsiocb);
7196                 goto free_rdp_context;
7197         }
7198
7199         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
7200         if (rc == IOCB_ERROR) {
7201                 lpfc_els_free_iocb(phba, elsiocb);
7202                 lpfc_nlp_put(ndlp);
7203         }
7204
7205 free_rdp_context:
7206         /* This reference put is for the original unsolicited RDP. If the
7207          * prep failed, there is no reference to remove.
7208          */
7209         lpfc_nlp_put(ndlp);
7210         kfree(rdp_context);
7211 }
7212
7213 static int
7214 lpfc_get_rdp_info(struct lpfc_hba *phba, struct lpfc_rdp_context *rdp_context)
7215 {
7216         LPFC_MBOXQ_t *mbox = NULL;
7217         int rc;
7218
7219         mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
7220         if (!mbox) {
7221                 lpfc_printf_log(phba, KERN_WARNING, LOG_MBOX | LOG_ELS,
7222                                 "7105 failed to allocate mailbox memory");
7223                 return 1;
7224         }
7225
7226         if (lpfc_sli4_dump_page_a0(phba, mbox))
7227                 goto rdp_fail;
7228         mbox->vport = rdp_context->ndlp->vport;
7229         mbox->mbox_cmpl = lpfc_mbx_cmpl_rdp_page_a0;
7230         mbox->ctx_ndlp = (struct lpfc_rdp_context *)rdp_context;
7231         rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
7232         if (rc == MBX_NOT_FINISHED) {
7233                 lpfc_mbox_rsrc_cleanup(phba, mbox, MBOX_THD_UNLOCKED);
7234                 return 1;
7235         }
7236
7237         return 0;
7238
7239 rdp_fail:
7240         mempool_free(mbox, phba->mbox_mem_pool);
7241         return 1;
7242 }
7243
7244 int lpfc_get_sfp_info_wait(struct lpfc_hba *phba,
7245                            struct lpfc_rdp_context *rdp_context)
7246 {
7247         LPFC_MBOXQ_t *mbox = NULL;
7248         int rc;
7249         struct lpfc_dmabuf *mp;
7250         struct lpfc_dmabuf *mpsave;
7251         void *virt;
7252         MAILBOX_t *mb;
7253
7254         mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
7255         if (!mbox) {
7256                 lpfc_printf_log(phba, KERN_WARNING, LOG_MBOX | LOG_ELS,
7257                                 "7205 failed to allocate mailbox memory");
7258                 return 1;
7259         }
7260
7261         if (lpfc_sli4_dump_page_a0(phba, mbox))
7262                 goto sfp_fail;
7263         mp = mbox->ctx_buf;
7264         mpsave = mp;
7265         virt = mp->virt;
7266         if (phba->sli_rev < LPFC_SLI_REV4) {
7267                 mb = &mbox->u.mb;
7268                 mb->un.varDmp.cv = 1;
7269                 mb->un.varDmp.co = 1;
7270                 mb->un.varWords[2] = 0;
7271                 mb->un.varWords[3] = DMP_SFF_PAGE_A0_SIZE / 4;
7272                 mb->un.varWords[4] = 0;
7273                 mb->un.varWords[5] = 0;
7274                 mb->un.varWords[6] = 0;
7275                 mb->un.varWords[7] = 0;
7276                 mb->un.varWords[8] = 0;
7277                 mb->un.varWords[9] = 0;
7278                 mb->un.varWords[10] = 0;
7279                 mbox->in_ext_byte_len = DMP_SFF_PAGE_A0_SIZE;
7280                 mbox->out_ext_byte_len = DMP_SFF_PAGE_A0_SIZE;
7281                 mbox->mbox_offset_word = 5;
7282                 mbox->ctx_buf = virt;
7283         } else {
7284                 bf_set(lpfc_mbx_memory_dump_type3_length,
7285                        &mbox->u.mqe.un.mem_dump_type3, DMP_SFF_PAGE_A0_SIZE);
7286                 mbox->u.mqe.un.mem_dump_type3.addr_lo = putPaddrLow(mp->phys);
7287                 mbox->u.mqe.un.mem_dump_type3.addr_hi = putPaddrHigh(mp->phys);
7288         }
7289         mbox->vport = phba->pport;
7290         mbox->ctx_ndlp = (struct lpfc_rdp_context *)rdp_context;
7291
7292         rc = lpfc_sli_issue_mbox_wait(phba, mbox, 30);
7293         if (rc == MBX_NOT_FINISHED) {
7294                 rc = 1;
7295                 goto error;
7296         }
7297
7298         if (phba->sli_rev == LPFC_SLI_REV4)
7299                 mp = (struct lpfc_dmabuf *)(mbox->ctx_buf);
7300         else
7301                 mp = mpsave;
7302
7303         if (bf_get(lpfc_mqe_status, &mbox->u.mqe)) {
7304                 rc = 1;
7305                 goto error;
7306         }
7307
7308         lpfc_sli_bemem_bcopy(mp->virt, &rdp_context->page_a0,
7309                              DMP_SFF_PAGE_A0_SIZE);
7310
7311         memset(mbox, 0, sizeof(*mbox));
7312         memset(mp->virt, 0, DMP_SFF_PAGE_A2_SIZE);
7313         INIT_LIST_HEAD(&mp->list);
7314
7315         /* save address for completion */
7316         mbox->ctx_buf = mp;
7317         mbox->vport = phba->pport;
7318
7319         bf_set(lpfc_mqe_command, &mbox->u.mqe, MBX_DUMP_MEMORY);
7320         bf_set(lpfc_mbx_memory_dump_type3_type,
7321                &mbox->u.mqe.un.mem_dump_type3, DMP_LMSD);
7322         bf_set(lpfc_mbx_memory_dump_type3_link,
7323                &mbox->u.mqe.un.mem_dump_type3, phba->sli4_hba.physical_port);
7324         bf_set(lpfc_mbx_memory_dump_type3_page_no,
7325                &mbox->u.mqe.un.mem_dump_type3, DMP_PAGE_A2);
7326         if (phba->sli_rev < LPFC_SLI_REV4) {
7327                 mb = &mbox->u.mb;
7328                 mb->un.varDmp.cv = 1;
7329                 mb->un.varDmp.co = 1;
7330                 mb->un.varWords[2] = 0;
7331                 mb->un.varWords[3] = DMP_SFF_PAGE_A2_SIZE / 4;
7332                 mb->un.varWords[4] = 0;
7333                 mb->un.varWords[5] = 0;
7334                 mb->un.varWords[6] = 0;
7335                 mb->un.varWords[7] = 0;
7336                 mb->un.varWords[8] = 0;
7337                 mb->un.varWords[9] = 0;
7338                 mb->un.varWords[10] = 0;
7339                 mbox->in_ext_byte_len = DMP_SFF_PAGE_A2_SIZE;
7340                 mbox->out_ext_byte_len = DMP_SFF_PAGE_A2_SIZE;
7341                 mbox->mbox_offset_word = 5;
7342                 mbox->ctx_buf = virt;
7343         } else {
7344                 bf_set(lpfc_mbx_memory_dump_type3_length,
7345                        &mbox->u.mqe.un.mem_dump_type3, DMP_SFF_PAGE_A2_SIZE);
7346                 mbox->u.mqe.un.mem_dump_type3.addr_lo = putPaddrLow(mp->phys);
7347                 mbox->u.mqe.un.mem_dump_type3.addr_hi = putPaddrHigh(mp->phys);
7348         }
7349
7350         mbox->ctx_ndlp = (struct lpfc_rdp_context *)rdp_context;
7351         rc = lpfc_sli_issue_mbox_wait(phba, mbox, 30);
7352         if (bf_get(lpfc_mqe_status, &mbox->u.mqe)) {
7353                 rc = 1;
7354                 goto error;
7355         }
7356         rc = 0;
7357
7358         lpfc_sli_bemem_bcopy(mp->virt, &rdp_context->page_a2,
7359                              DMP_SFF_PAGE_A2_SIZE);
7360
7361 error:
7362         mbox->ctx_buf = mpsave;
7363         lpfc_mbox_rsrc_cleanup(phba, mbox, MBOX_THD_UNLOCKED);
7364
7365         return rc;
7366
7367 sfp_fail:
7368         mempool_free(mbox, phba->mbox_mem_pool);
7369         return 1;
7370 }
7371
7372 /*
7373  * lpfc_els_rcv_rdp - Process an unsolicited RDP ELS.
7374  * @vport: pointer to a host virtual N_Port data structure.
7375  * @cmdiocb: pointer to lpfc command iocb data structure.
7376  * @ndlp: pointer to a node-list data structure.
7377  *
7378  * This routine processes an unsolicited RDP(Read Diagnostic Parameters)
7379  * IOCB. First, the payload of the unsolicited RDP is checked.
7380  * Then it will (1) send MBX_DUMP_MEMORY, Embedded DMP_LMSD sub command TYPE-3
7381  * for Page A0, (2) send MBX_DUMP_MEMORY, DMP_LMSD for Page A2,
7382  * (3) send MBX_READ_LNK_STAT to get link stat, (4) Call lpfc_els_rdp_cmpl
7383  * gather all data and send RDP response.
7384  *
7385  * Return code
7386  *   0 - Sent the acc response
7387  *   1 - Sent the reject response.
7388  */
7389 static int
7390 lpfc_els_rcv_rdp(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
7391                 struct lpfc_nodelist *ndlp)
7392 {
7393         struct lpfc_hba *phba = vport->phba;
7394         struct lpfc_dmabuf *pcmd;
7395         uint8_t rjt_err, rjt_expl = LSEXP_NOTHING_MORE;
7396         struct fc_rdp_req_frame *rdp_req;
7397         struct lpfc_rdp_context *rdp_context;
7398         union lpfc_wqe128 *cmd = NULL;
7399         struct ls_rjt stat;
7400
7401         if (phba->sli_rev < LPFC_SLI_REV4 ||
7402             bf_get(lpfc_sli_intf_if_type, &phba->sli4_hba.sli_intf) <
7403                                                 LPFC_SLI_INTF_IF_TYPE_2) {
7404                 rjt_err = LSRJT_UNABLE_TPC;
7405                 rjt_expl = LSEXP_REQ_UNSUPPORTED;
7406                 goto error;
7407         }
7408
7409         if (phba->sli_rev < LPFC_SLI_REV4 || (phba->hba_flag & HBA_FCOE_MODE)) {
7410                 rjt_err = LSRJT_UNABLE_TPC;
7411                 rjt_expl = LSEXP_REQ_UNSUPPORTED;
7412                 goto error;
7413         }
7414
7415         pcmd = cmdiocb->cmd_dmabuf;
7416         rdp_req = (struct fc_rdp_req_frame *) pcmd->virt;
7417
7418         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
7419                          "2422 ELS RDP Request "
7420                          "dec len %d tag x%x port_id %d len %d\n",
7421                          be32_to_cpu(rdp_req->rdp_des_length),
7422                          be32_to_cpu(rdp_req->nport_id_desc.tag),
7423                          be32_to_cpu(rdp_req->nport_id_desc.nport_id),
7424                          be32_to_cpu(rdp_req->nport_id_desc.length));
7425
7426         if (sizeof(struct fc_rdp_nport_desc) !=
7427                         be32_to_cpu(rdp_req->rdp_des_length))
7428                 goto rjt_logerr;
7429         if (RDP_N_PORT_DESC_TAG != be32_to_cpu(rdp_req->nport_id_desc.tag))
7430                 goto rjt_logerr;
7431         if (RDP_NPORT_ID_SIZE !=
7432                         be32_to_cpu(rdp_req->nport_id_desc.length))
7433                 goto rjt_logerr;
7434         rdp_context = kzalloc(sizeof(struct lpfc_rdp_context), GFP_KERNEL);
7435         if (!rdp_context) {
7436                 rjt_err = LSRJT_UNABLE_TPC;
7437                 goto error;
7438         }
7439
7440         cmd = &cmdiocb->wqe;
7441         rdp_context->ndlp = lpfc_nlp_get(ndlp);
7442         if (!rdp_context->ndlp) {
7443                 kfree(rdp_context);
7444                 rjt_err = LSRJT_UNABLE_TPC;
7445                 goto error;
7446         }
7447         rdp_context->ox_id = bf_get(wqe_rcvoxid,
7448                                     &cmd->xmit_els_rsp.wqe_com);
7449         rdp_context->rx_id = bf_get(wqe_ctxt_tag,
7450                                     &cmd->xmit_els_rsp.wqe_com);
7451         rdp_context->cmpl = lpfc_els_rdp_cmpl;
7452         if (lpfc_get_rdp_info(phba, rdp_context)) {
7453                 lpfc_printf_vlog(ndlp->vport, KERN_WARNING, LOG_ELS,
7454                                  "2423 Unable to send mailbox");
7455                 kfree(rdp_context);
7456                 rjt_err = LSRJT_UNABLE_TPC;
7457                 lpfc_nlp_put(ndlp);
7458                 goto error;
7459         }
7460
7461         return 0;
7462
7463 rjt_logerr:
7464         rjt_err = LSRJT_LOGICAL_ERR;
7465
7466 error:
7467         memset(&stat, 0, sizeof(stat));
7468         stat.un.b.lsRjtRsnCode = rjt_err;
7469         stat.un.b.lsRjtRsnCodeExp = rjt_expl;
7470         lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
7471         return 1;
7472 }
7473
7474
7475 static void
7476 lpfc_els_lcb_rsp(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
7477 {
7478         MAILBOX_t *mb;
7479         IOCB_t *icmd;
7480         union lpfc_wqe128 *wqe;
7481         uint8_t *pcmd;
7482         struct lpfc_iocbq *elsiocb;
7483         struct lpfc_nodelist *ndlp;
7484         struct ls_rjt *stat;
7485         union lpfc_sli4_cfg_shdr *shdr;
7486         struct lpfc_lcb_context *lcb_context;
7487         struct fc_lcb_res_frame *lcb_res;
7488         uint32_t cmdsize, shdr_status, shdr_add_status;
7489         int rc;
7490
7491         mb = &pmb->u.mb;
7492         lcb_context = (struct lpfc_lcb_context *)pmb->ctx_ndlp;
7493         ndlp = lcb_context->ndlp;
7494         pmb->ctx_ndlp = NULL;
7495         pmb->ctx_buf = NULL;
7496
7497         shdr = (union lpfc_sli4_cfg_shdr *)
7498                         &pmb->u.mqe.un.beacon_config.header.cfg_shdr;
7499         shdr_status = bf_get(lpfc_mbox_hdr_status, &shdr->response);
7500         shdr_add_status = bf_get(lpfc_mbox_hdr_add_status, &shdr->response);
7501
7502         lpfc_printf_log(phba, KERN_INFO, LOG_MBOX,
7503                                 "0194 SET_BEACON_CONFIG mailbox "
7504                                 "completed with status x%x add_status x%x,"
7505                                 " mbx status x%x\n",
7506                                 shdr_status, shdr_add_status, mb->mbxStatus);
7507
7508         if ((mb->mbxStatus != MBX_SUCCESS) || shdr_status ||
7509             (shdr_add_status == ADD_STATUS_OPERATION_ALREADY_ACTIVE) ||
7510             (shdr_add_status == ADD_STATUS_INVALID_REQUEST)) {
7511                 mempool_free(pmb, phba->mbox_mem_pool);
7512                 goto error;
7513         }
7514
7515         mempool_free(pmb, phba->mbox_mem_pool);
7516         cmdsize = sizeof(struct fc_lcb_res_frame);
7517         elsiocb = lpfc_prep_els_iocb(phba->pport, 0, cmdsize,
7518                         lpfc_max_els_tries, ndlp,
7519                         ndlp->nlp_DID, ELS_CMD_ACC);
7520
7521         /* Decrement the ndlp reference count from previous mbox command */
7522         lpfc_nlp_put(ndlp);
7523
7524         if (!elsiocb)
7525                 goto free_lcb_context;
7526
7527         lcb_res = (struct fc_lcb_res_frame *)elsiocb->cmd_dmabuf->virt;
7528
7529         memset(lcb_res, 0, sizeof(struct fc_lcb_res_frame));
7530
7531         if (phba->sli_rev == LPFC_SLI_REV4) {
7532                 wqe = &elsiocb->wqe;
7533                 bf_set(wqe_ctxt_tag, &wqe->generic.wqe_com, lcb_context->rx_id);
7534                 bf_set(wqe_rcvoxid, &wqe->xmit_els_rsp.wqe_com,
7535                        lcb_context->ox_id);
7536         } else {
7537                 icmd = &elsiocb->iocb;
7538                 icmd->ulpContext = lcb_context->rx_id;
7539                 icmd->unsli3.rcvsli3.ox_id = lcb_context->ox_id;
7540         }
7541
7542         pcmd = (uint8_t *)elsiocb->cmd_dmabuf->virt;
7543         *((uint32_t *)(pcmd)) = ELS_CMD_ACC;
7544         lcb_res->lcb_sub_command = lcb_context->sub_command;
7545         lcb_res->lcb_type = lcb_context->type;
7546         lcb_res->capability = lcb_context->capability;
7547         lcb_res->lcb_frequency = lcb_context->frequency;
7548         lcb_res->lcb_duration = lcb_context->duration;
7549         elsiocb->cmd_cmpl = lpfc_cmpl_els_rsp;
7550         phba->fc_stat.elsXmitACC++;
7551
7552         elsiocb->ndlp = lpfc_nlp_get(ndlp);
7553         if (!elsiocb->ndlp) {
7554                 lpfc_els_free_iocb(phba, elsiocb);
7555                 goto out;
7556         }
7557
7558         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
7559         if (rc == IOCB_ERROR) {
7560                 lpfc_els_free_iocb(phba, elsiocb);
7561                 lpfc_nlp_put(ndlp);
7562         }
7563  out:
7564         kfree(lcb_context);
7565         return;
7566
7567 error:
7568         cmdsize = sizeof(struct fc_lcb_res_frame);
7569         elsiocb = lpfc_prep_els_iocb(phba->pport, 0, cmdsize,
7570                                      lpfc_max_els_tries, ndlp,
7571                                      ndlp->nlp_DID, ELS_CMD_LS_RJT);
7572         lpfc_nlp_put(ndlp);
7573         if (!elsiocb)
7574                 goto free_lcb_context;
7575
7576         if (phba->sli_rev == LPFC_SLI_REV4) {
7577                 wqe = &elsiocb->wqe;
7578                 bf_set(wqe_ctxt_tag, &wqe->generic.wqe_com, lcb_context->rx_id);
7579                 bf_set(wqe_rcvoxid, &wqe->xmit_els_rsp.wqe_com,
7580                        lcb_context->ox_id);
7581         } else {
7582                 icmd = &elsiocb->iocb;
7583                 icmd->ulpContext = lcb_context->rx_id;
7584                 icmd->unsli3.rcvsli3.ox_id = lcb_context->ox_id;
7585         }
7586
7587         pcmd = (uint8_t *)elsiocb->cmd_dmabuf->virt;
7588
7589         *((uint32_t *)(pcmd)) = ELS_CMD_LS_RJT;
7590         stat = (struct ls_rjt *)(pcmd + sizeof(uint32_t));
7591         stat->un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
7592
7593         if (shdr_add_status == ADD_STATUS_OPERATION_ALREADY_ACTIVE)
7594                 stat->un.b.lsRjtRsnCodeExp = LSEXP_CMD_IN_PROGRESS;
7595
7596         elsiocb->cmd_cmpl = lpfc_cmpl_els_rsp;
7597         phba->fc_stat.elsXmitLSRJT++;
7598         elsiocb->ndlp = lpfc_nlp_get(ndlp);
7599         if (!elsiocb->ndlp) {
7600                 lpfc_els_free_iocb(phba, elsiocb);
7601                 goto free_lcb_context;
7602         }
7603
7604         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
7605         if (rc == IOCB_ERROR) {
7606                 lpfc_els_free_iocb(phba, elsiocb);
7607                 lpfc_nlp_put(ndlp);
7608         }
7609 free_lcb_context:
7610         kfree(lcb_context);
7611 }
7612
7613 static int
7614 lpfc_sli4_set_beacon(struct lpfc_vport *vport,
7615                      struct lpfc_lcb_context *lcb_context,
7616                      uint32_t beacon_state)
7617 {
7618         struct lpfc_hba *phba = vport->phba;
7619         union lpfc_sli4_cfg_shdr *cfg_shdr;
7620         LPFC_MBOXQ_t *mbox = NULL;
7621         uint32_t len;
7622         int rc;
7623
7624         mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
7625         if (!mbox)
7626                 return 1;
7627
7628         cfg_shdr = &mbox->u.mqe.un.sli4_config.header.cfg_shdr;
7629         len = sizeof(struct lpfc_mbx_set_beacon_config) -
7630                 sizeof(struct lpfc_sli4_cfg_mhdr);
7631         lpfc_sli4_config(phba, mbox, LPFC_MBOX_SUBSYSTEM_COMMON,
7632                          LPFC_MBOX_OPCODE_SET_BEACON_CONFIG, len,
7633                          LPFC_SLI4_MBX_EMBED);
7634         mbox->ctx_ndlp = (void *)lcb_context;
7635         mbox->vport = phba->pport;
7636         mbox->mbox_cmpl = lpfc_els_lcb_rsp;
7637         bf_set(lpfc_mbx_set_beacon_port_num, &mbox->u.mqe.un.beacon_config,
7638                phba->sli4_hba.physical_port);
7639         bf_set(lpfc_mbx_set_beacon_state, &mbox->u.mqe.un.beacon_config,
7640                beacon_state);
7641         mbox->u.mqe.un.beacon_config.word5 = 0;         /* Reserved */
7642
7643         /*
7644          *      Check bv1s bit before issuing the mailbox
7645          *      if bv1s == 1, LCB V1 supported
7646          *      else, LCB V0 supported
7647          */
7648
7649         if (phba->sli4_hba.pc_sli4_params.bv1s) {
7650                 /* COMMON_SET_BEACON_CONFIG_V1 */
7651                 cfg_shdr->request.word9 = BEACON_VERSION_V1;
7652                 lcb_context->capability |= LCB_CAPABILITY_DURATION;
7653                 bf_set(lpfc_mbx_set_beacon_port_type,
7654                        &mbox->u.mqe.un.beacon_config, 0);
7655                 bf_set(lpfc_mbx_set_beacon_duration_v1,
7656                        &mbox->u.mqe.un.beacon_config,
7657                        be16_to_cpu(lcb_context->duration));
7658         } else {
7659                 /* COMMON_SET_BEACON_CONFIG_V0 */
7660                 if (be16_to_cpu(lcb_context->duration) != 0) {
7661                         mempool_free(mbox, phba->mbox_mem_pool);
7662                         return 1;
7663                 }
7664                 cfg_shdr->request.word9 = BEACON_VERSION_V0;
7665                 lcb_context->capability &=  ~(LCB_CAPABILITY_DURATION);
7666                 bf_set(lpfc_mbx_set_beacon_state,
7667                        &mbox->u.mqe.un.beacon_config, beacon_state);
7668                 bf_set(lpfc_mbx_set_beacon_port_type,
7669                        &mbox->u.mqe.un.beacon_config, 1);
7670                 bf_set(lpfc_mbx_set_beacon_duration,
7671                        &mbox->u.mqe.un.beacon_config,
7672                        be16_to_cpu(lcb_context->duration));
7673         }
7674
7675         rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
7676         if (rc == MBX_NOT_FINISHED) {
7677                 mempool_free(mbox, phba->mbox_mem_pool);
7678                 return 1;
7679         }
7680
7681         return 0;
7682 }
7683
7684
7685 /**
7686  * lpfc_els_rcv_lcb - Process an unsolicited LCB
7687  * @vport: pointer to a host virtual N_Port data structure.
7688  * @cmdiocb: pointer to lpfc command iocb data structure.
7689  * @ndlp: pointer to a node-list data structure.
7690  *
7691  * This routine processes an unsolicited LCB(LINK CABLE BEACON) IOCB.
7692  * First, the payload of the unsolicited LCB is checked.
7693  * Then based on Subcommand beacon will either turn on or off.
7694  *
7695  * Return code
7696  * 0 - Sent the acc response
7697  * 1 - Sent the reject response.
7698  **/
7699 static int
7700 lpfc_els_rcv_lcb(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
7701                  struct lpfc_nodelist *ndlp)
7702 {
7703         struct lpfc_hba *phba = vport->phba;
7704         struct lpfc_dmabuf *pcmd;
7705         uint8_t *lp;
7706         struct fc_lcb_request_frame *beacon;
7707         struct lpfc_lcb_context *lcb_context;
7708         u8 state, rjt_err = 0;
7709         struct ls_rjt stat;
7710
7711         pcmd = cmdiocb->cmd_dmabuf;
7712         lp = (uint8_t *)pcmd->virt;
7713         beacon = (struct fc_lcb_request_frame *)pcmd->virt;
7714
7715         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
7716                         "0192 ELS LCB Data x%x x%x x%x x%x sub x%x "
7717                         "type x%x frequency %x duration x%x\n",
7718                         lp[0], lp[1], lp[2],
7719                         beacon->lcb_command,
7720                         beacon->lcb_sub_command,
7721                         beacon->lcb_type,
7722                         beacon->lcb_frequency,
7723                         be16_to_cpu(beacon->lcb_duration));
7724
7725         if (beacon->lcb_sub_command != LPFC_LCB_ON &&
7726             beacon->lcb_sub_command != LPFC_LCB_OFF) {
7727                 rjt_err = LSRJT_CMD_UNSUPPORTED;
7728                 goto rjt;
7729         }
7730
7731         if (phba->sli_rev < LPFC_SLI_REV4  ||
7732             phba->hba_flag & HBA_FCOE_MODE ||
7733             (bf_get(lpfc_sli_intf_if_type, &phba->sli4_hba.sli_intf) <
7734             LPFC_SLI_INTF_IF_TYPE_2)) {
7735                 rjt_err = LSRJT_CMD_UNSUPPORTED;
7736                 goto rjt;
7737         }
7738
7739         lcb_context = kmalloc(sizeof(*lcb_context), GFP_KERNEL);
7740         if (!lcb_context) {
7741                 rjt_err = LSRJT_UNABLE_TPC;
7742                 goto rjt;
7743         }
7744
7745         state = (beacon->lcb_sub_command == LPFC_LCB_ON) ? 1 : 0;
7746         lcb_context->sub_command = beacon->lcb_sub_command;
7747         lcb_context->capability = 0;
7748         lcb_context->type = beacon->lcb_type;
7749         lcb_context->frequency = beacon->lcb_frequency;
7750         lcb_context->duration = beacon->lcb_duration;
7751         lcb_context->ox_id = get_job_rcvoxid(phba, cmdiocb);
7752         lcb_context->rx_id = get_job_ulpcontext(phba, cmdiocb);
7753         lcb_context->ndlp = lpfc_nlp_get(ndlp);
7754         if (!lcb_context->ndlp) {
7755                 rjt_err = LSRJT_UNABLE_TPC;
7756                 goto rjt_free;
7757         }
7758
7759         if (lpfc_sli4_set_beacon(vport, lcb_context, state)) {
7760                 lpfc_printf_vlog(ndlp->vport, KERN_ERR, LOG_TRACE_EVENT,
7761                                  "0193 failed to send mail box");
7762                 lpfc_nlp_put(ndlp);
7763                 rjt_err = LSRJT_UNABLE_TPC;
7764                 goto rjt_free;
7765         }
7766         return 0;
7767
7768 rjt_free:
7769         kfree(lcb_context);
7770 rjt:
7771         memset(&stat, 0, sizeof(stat));
7772         stat.un.b.lsRjtRsnCode = rjt_err;
7773         lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
7774         return 1;
7775 }
7776
7777
7778 /**
7779  * lpfc_els_flush_rscn - Clean up any rscn activities with a vport
7780  * @vport: pointer to a host virtual N_Port data structure.
7781  *
7782  * This routine cleans up any Registration State Change Notification
7783  * (RSCN) activity with a @vport. Note that the fc_rscn_flush flag of the
7784  * @vport together with the host_lock is used to prevent multiple thread
7785  * trying to access the RSCN array on a same @vport at the same time.
7786  **/
7787 void
7788 lpfc_els_flush_rscn(struct lpfc_vport *vport)
7789 {
7790         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
7791         struct lpfc_hba  *phba = vport->phba;
7792         int i;
7793
7794         spin_lock_irq(shost->host_lock);
7795         if (vport->fc_rscn_flush) {
7796                 /* Another thread is walking fc_rscn_id_list on this vport */
7797                 spin_unlock_irq(shost->host_lock);
7798                 return;
7799         }
7800         /* Indicate we are walking lpfc_els_flush_rscn on this vport */
7801         vport->fc_rscn_flush = 1;
7802         spin_unlock_irq(shost->host_lock);
7803
7804         for (i = 0; i < vport->fc_rscn_id_cnt; i++) {
7805                 lpfc_in_buf_free(phba, vport->fc_rscn_id_list[i]);
7806                 vport->fc_rscn_id_list[i] = NULL;
7807         }
7808         spin_lock_irq(shost->host_lock);
7809         vport->fc_rscn_id_cnt = 0;
7810         vport->fc_flag &= ~(FC_RSCN_MODE | FC_RSCN_DISCOVERY);
7811         spin_unlock_irq(shost->host_lock);
7812         lpfc_can_disctmo(vport);
7813         /* Indicate we are done walking this fc_rscn_id_list */
7814         vport->fc_rscn_flush = 0;
7815 }
7816
7817 /**
7818  * lpfc_rscn_payload_check - Check whether there is a pending rscn to a did
7819  * @vport: pointer to a host virtual N_Port data structure.
7820  * @did: remote destination port identifier.
7821  *
7822  * This routine checks whether there is any pending Registration State
7823  * Configuration Notification (RSCN) to a @did on @vport.
7824  *
7825  * Return code
7826  *   None zero - The @did matched with a pending rscn
7827  *   0 - not able to match @did with a pending rscn
7828  **/
7829 int
7830 lpfc_rscn_payload_check(struct lpfc_vport *vport, uint32_t did)
7831 {
7832         D_ID ns_did;
7833         D_ID rscn_did;
7834         uint32_t *lp;
7835         uint32_t payload_len, i;
7836         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
7837
7838         ns_did.un.word = did;
7839
7840         /* Never match fabric nodes for RSCNs */
7841         if ((did & Fabric_DID_MASK) == Fabric_DID_MASK)
7842                 return 0;
7843
7844         /* If we are doing a FULL RSCN rediscovery, match everything */
7845         if (vport->fc_flag & FC_RSCN_DISCOVERY)
7846                 return did;
7847
7848         spin_lock_irq(shost->host_lock);
7849         if (vport->fc_rscn_flush) {
7850                 /* Another thread is walking fc_rscn_id_list on this vport */
7851                 spin_unlock_irq(shost->host_lock);
7852                 return 0;
7853         }
7854         /* Indicate we are walking fc_rscn_id_list on this vport */
7855         vport->fc_rscn_flush = 1;
7856         spin_unlock_irq(shost->host_lock);
7857         for (i = 0; i < vport->fc_rscn_id_cnt; i++) {
7858                 lp = vport->fc_rscn_id_list[i]->virt;
7859                 payload_len = be32_to_cpu(*lp++ & ~ELS_CMD_MASK);
7860                 payload_len -= sizeof(uint32_t);        /* take off word 0 */
7861                 while (payload_len) {
7862                         rscn_did.un.word = be32_to_cpu(*lp++);
7863                         payload_len -= sizeof(uint32_t);
7864                         switch (rscn_did.un.b.resv & RSCN_ADDRESS_FORMAT_MASK) {
7865                         case RSCN_ADDRESS_FORMAT_PORT:
7866                                 if ((ns_did.un.b.domain == rscn_did.un.b.domain)
7867                                     && (ns_did.un.b.area == rscn_did.un.b.area)
7868                                     && (ns_did.un.b.id == rscn_did.un.b.id))
7869                                         goto return_did_out;
7870                                 break;
7871                         case RSCN_ADDRESS_FORMAT_AREA:
7872                                 if ((ns_did.un.b.domain == rscn_did.un.b.domain)
7873                                     && (ns_did.un.b.area == rscn_did.un.b.area))
7874                                         goto return_did_out;
7875                                 break;
7876                         case RSCN_ADDRESS_FORMAT_DOMAIN:
7877                                 if (ns_did.un.b.domain == rscn_did.un.b.domain)
7878                                         goto return_did_out;
7879                                 break;
7880                         case RSCN_ADDRESS_FORMAT_FABRIC:
7881                                 goto return_did_out;
7882                         }
7883                 }
7884         }
7885         /* Indicate we are done with walking fc_rscn_id_list on this vport */
7886         vport->fc_rscn_flush = 0;
7887         return 0;
7888 return_did_out:
7889         /* Indicate we are done with walking fc_rscn_id_list on this vport */
7890         vport->fc_rscn_flush = 0;
7891         return did;
7892 }
7893
7894 /**
7895  * lpfc_rscn_recovery_check - Send recovery event to vport nodes matching rscn
7896  * @vport: pointer to a host virtual N_Port data structure.
7897  *
7898  * This routine sends recovery (NLP_EVT_DEVICE_RECOVERY) event to the
7899  * state machine for a @vport's nodes that are with pending RSCN (Registration
7900  * State Change Notification).
7901  *
7902  * Return code
7903  *   0 - Successful (currently alway return 0)
7904  **/
7905 static int
7906 lpfc_rscn_recovery_check(struct lpfc_vport *vport)
7907 {
7908         struct lpfc_nodelist *ndlp = NULL, *n;
7909
7910         /* Move all affected nodes by pending RSCNs to NPR state. */
7911         list_for_each_entry_safe(ndlp, n, &vport->fc_nodes, nlp_listp) {
7912                 if ((ndlp->nlp_state == NLP_STE_UNUSED_NODE) ||
7913                     !lpfc_rscn_payload_check(vport, ndlp->nlp_DID))
7914                         continue;
7915
7916                 /* NVME Target mode does not do RSCN Recovery. */
7917                 if (vport->phba->nvmet_support)
7918                         continue;
7919
7920                 /* If we are in the process of doing discovery on this
7921                  * NPort, let it continue on its own.
7922                  */
7923                 switch (ndlp->nlp_state) {
7924                 case  NLP_STE_PLOGI_ISSUE:
7925                 case  NLP_STE_ADISC_ISSUE:
7926                 case  NLP_STE_REG_LOGIN_ISSUE:
7927                 case  NLP_STE_PRLI_ISSUE:
7928                 case  NLP_STE_LOGO_ISSUE:
7929                         continue;
7930                 }
7931
7932                 lpfc_disc_state_machine(vport, ndlp, NULL,
7933                                         NLP_EVT_DEVICE_RECOVERY);
7934                 lpfc_cancel_retry_delay_tmo(vport, ndlp);
7935         }
7936         return 0;
7937 }
7938
7939 /**
7940  * lpfc_send_rscn_event - Send an RSCN event to management application
7941  * @vport: pointer to a host virtual N_Port data structure.
7942  * @cmdiocb: pointer to lpfc command iocb data structure.
7943  *
7944  * lpfc_send_rscn_event sends an RSCN netlink event to management
7945  * applications.
7946  */
7947 static void
7948 lpfc_send_rscn_event(struct lpfc_vport *vport,
7949                 struct lpfc_iocbq *cmdiocb)
7950 {
7951         struct lpfc_dmabuf *pcmd;
7952         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
7953         uint32_t *payload_ptr;
7954         uint32_t payload_len;
7955         struct lpfc_rscn_event_header *rscn_event_data;
7956
7957         pcmd = cmdiocb->cmd_dmabuf;
7958         payload_ptr = (uint32_t *) pcmd->virt;
7959         payload_len = be32_to_cpu(*payload_ptr & ~ELS_CMD_MASK);
7960
7961         rscn_event_data = kmalloc(sizeof(struct lpfc_rscn_event_header) +
7962                 payload_len, GFP_KERNEL);
7963         if (!rscn_event_data) {
7964                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
7965                         "0147 Failed to allocate memory for RSCN event\n");
7966                 return;
7967         }
7968         rscn_event_data->event_type = FC_REG_RSCN_EVENT;
7969         rscn_event_data->payload_length = payload_len;
7970         memcpy(rscn_event_data->rscn_payload, payload_ptr,
7971                 payload_len);
7972
7973         fc_host_post_vendor_event(shost,
7974                 fc_get_event_number(),
7975                 sizeof(struct lpfc_rscn_event_header) + payload_len,
7976                 (char *)rscn_event_data,
7977                 LPFC_NL_VENDOR_ID);
7978
7979         kfree(rscn_event_data);
7980 }
7981
7982 /**
7983  * lpfc_els_rcv_rscn - Process an unsolicited rscn iocb
7984  * @vport: pointer to a host virtual N_Port data structure.
7985  * @cmdiocb: pointer to lpfc command iocb data structure.
7986  * @ndlp: pointer to a node-list data structure.
7987  *
7988  * This routine processes an unsolicited RSCN (Registration State Change
7989  * Notification) IOCB. First, the payload of the unsolicited RSCN is walked
7990  * to invoke fc_host_post_event() routine to the FC transport layer. If the
7991  * discover state machine is about to begin discovery, it just accepts the
7992  * RSCN and the discovery process will satisfy the RSCN. If this RSCN only
7993  * contains N_Port IDs for other vports on this HBA, it just accepts the
7994  * RSCN and ignore processing it. If the state machine is in the recovery
7995  * state, the fc_rscn_id_list of this @vport is walked and the
7996  * lpfc_rscn_recovery_check() routine is invoked to send recovery event for
7997  * all nodes that match RSCN payload. Otherwise, the lpfc_els_handle_rscn()
7998  * routine is invoked to handle the RSCN event.
7999  *
8000  * Return code
8001  *   0 - Just sent the acc response
8002  *   1 - Sent the acc response and waited for name server completion
8003  **/
8004 static int
8005 lpfc_els_rcv_rscn(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
8006                   struct lpfc_nodelist *ndlp)
8007 {
8008         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
8009         struct lpfc_hba  *phba = vport->phba;
8010         struct lpfc_dmabuf *pcmd;
8011         uint32_t *lp, *datap;
8012         uint32_t payload_len, length, nportid, *cmd;
8013         int rscn_cnt;
8014         int rscn_id = 0, hba_id = 0;
8015         int i, tmo;
8016
8017         pcmd = cmdiocb->cmd_dmabuf;
8018         lp = (uint32_t *) pcmd->virt;
8019
8020         payload_len = be32_to_cpu(*lp++ & ~ELS_CMD_MASK);
8021         payload_len -= sizeof(uint32_t);        /* take off word 0 */
8022         /* RSCN received */
8023         lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
8024                          "0214 RSCN received Data: x%x x%x x%x x%x\n",
8025                          vport->fc_flag, payload_len, *lp,
8026                          vport->fc_rscn_id_cnt);
8027
8028         /* Send an RSCN event to the management application */
8029         lpfc_send_rscn_event(vport, cmdiocb);
8030
8031         for (i = 0; i < payload_len/sizeof(uint32_t); i++)
8032                 fc_host_post_event(shost, fc_get_event_number(),
8033                         FCH_EVT_RSCN, lp[i]);
8034
8035         /* Check if RSCN is coming from a direct-connected remote NPort */
8036         if (vport->fc_flag & FC_PT2PT) {
8037                 /* If so, just ACC it, no other action needed for now */
8038                 lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
8039                                  "2024 pt2pt RSCN %08x Data: x%x x%x\n",
8040                                  *lp, vport->fc_flag, payload_len);
8041                 lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
8042
8043                 /* Check to see if we need to NVME rescan this target
8044                  * remoteport.
8045                  */
8046                 if (ndlp->nlp_fc4_type & NLP_FC4_NVME &&
8047                     ndlp->nlp_type & (NLP_NVME_TARGET | NLP_NVME_DISCOVERY))
8048                         lpfc_nvme_rescan_port(vport, ndlp);
8049                 return 0;
8050         }
8051
8052         /* If we are about to begin discovery, just ACC the RSCN.
8053          * Discovery processing will satisfy it.
8054          */
8055         if (vport->port_state <= LPFC_NS_QRY) {
8056                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
8057                         "RCV RSCN ignore: did:x%x/ste:x%x flg:x%x",
8058                         ndlp->nlp_DID, vport->port_state, ndlp->nlp_flag);
8059
8060                 lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
8061                 return 0;
8062         }
8063
8064         /* If this RSCN just contains NPortIDs for other vports on this HBA,
8065          * just ACC and ignore it.
8066          */
8067         if ((phba->sli3_options & LPFC_SLI3_NPIV_ENABLED) &&
8068                 !(vport->cfg_peer_port_login)) {
8069                 i = payload_len;
8070                 datap = lp;
8071                 while (i > 0) {
8072                         nportid = *datap++;
8073                         nportid = ((be32_to_cpu(nportid)) & Mask_DID);
8074                         i -= sizeof(uint32_t);
8075                         rscn_id++;
8076                         if (lpfc_find_vport_by_did(phba, nportid))
8077                                 hba_id++;
8078                 }
8079                 if (rscn_id == hba_id) {
8080                         /* ALL NPortIDs in RSCN are on HBA */
8081                         lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
8082                                          "0219 Ignore RSCN "
8083                                          "Data: x%x x%x x%x x%x\n",
8084                                          vport->fc_flag, payload_len,
8085                                          *lp, vport->fc_rscn_id_cnt);
8086                         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
8087                                 "RCV RSCN vport:  did:x%x/ste:x%x flg:x%x",
8088                                 ndlp->nlp_DID, vport->port_state,
8089                                 ndlp->nlp_flag);
8090
8091                         lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb,
8092                                 ndlp, NULL);
8093                         /* Restart disctmo if its already running */
8094                         if (vport->fc_flag & FC_DISC_TMO) {
8095                                 tmo = ((phba->fc_ratov * 3) + 3);
8096                                 mod_timer(&vport->fc_disctmo,
8097                                           jiffies +
8098                                           msecs_to_jiffies(1000 * tmo));
8099                         }
8100                         return 0;
8101                 }
8102         }
8103
8104         spin_lock_irq(shost->host_lock);
8105         if (vport->fc_rscn_flush) {
8106                 /* Another thread is walking fc_rscn_id_list on this vport */
8107                 vport->fc_flag |= FC_RSCN_DISCOVERY;
8108                 spin_unlock_irq(shost->host_lock);
8109                 /* Send back ACC */
8110                 lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
8111                 return 0;
8112         }
8113         /* Indicate we are walking fc_rscn_id_list on this vport */
8114         vport->fc_rscn_flush = 1;
8115         spin_unlock_irq(shost->host_lock);
8116         /* Get the array count after successfully have the token */
8117         rscn_cnt = vport->fc_rscn_id_cnt;
8118         /* If we are already processing an RSCN, save the received
8119          * RSCN payload buffer, cmdiocb->cmd_dmabuf to process later.
8120          */
8121         if (vport->fc_flag & (FC_RSCN_MODE | FC_NDISC_ACTIVE)) {
8122                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
8123                         "RCV RSCN defer:  did:x%x/ste:x%x flg:x%x",
8124                         ndlp->nlp_DID, vport->port_state, ndlp->nlp_flag);
8125
8126                 spin_lock_irq(shost->host_lock);
8127                 vport->fc_flag |= FC_RSCN_DEFERRED;
8128
8129                 /* Restart disctmo if its already running */
8130                 if (vport->fc_flag & FC_DISC_TMO) {
8131                         tmo = ((phba->fc_ratov * 3) + 3);
8132                         mod_timer(&vport->fc_disctmo,
8133                                   jiffies + msecs_to_jiffies(1000 * tmo));
8134                 }
8135                 if ((rscn_cnt < FC_MAX_HOLD_RSCN) &&
8136                     !(vport->fc_flag & FC_RSCN_DISCOVERY)) {
8137                         vport->fc_flag |= FC_RSCN_MODE;
8138                         spin_unlock_irq(shost->host_lock);
8139                         if (rscn_cnt) {
8140                                 cmd = vport->fc_rscn_id_list[rscn_cnt-1]->virt;
8141                                 length = be32_to_cpu(*cmd & ~ELS_CMD_MASK);
8142                         }
8143                         if ((rscn_cnt) &&
8144                             (payload_len + length <= LPFC_BPL_SIZE)) {
8145                                 *cmd &= ELS_CMD_MASK;
8146                                 *cmd |= cpu_to_be32(payload_len + length);
8147                                 memcpy(((uint8_t *)cmd) + length, lp,
8148                                        payload_len);
8149                         } else {
8150                                 vport->fc_rscn_id_list[rscn_cnt] = pcmd;
8151                                 vport->fc_rscn_id_cnt++;
8152                                 /* If we zero, cmdiocb->cmd_dmabuf, the calling
8153                                  * routine will not try to free it.
8154                                  */
8155                                 cmdiocb->cmd_dmabuf = NULL;
8156                         }
8157                         /* Deferred RSCN */
8158                         lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
8159                                          "0235 Deferred RSCN "
8160                                          "Data: x%x x%x x%x\n",
8161                                          vport->fc_rscn_id_cnt, vport->fc_flag,
8162                                          vport->port_state);
8163                 } else {
8164                         vport->fc_flag |= FC_RSCN_DISCOVERY;
8165                         spin_unlock_irq(shost->host_lock);
8166                         /* ReDiscovery RSCN */
8167                         lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
8168                                          "0234 ReDiscovery RSCN "
8169                                          "Data: x%x x%x x%x\n",
8170                                          vport->fc_rscn_id_cnt, vport->fc_flag,
8171                                          vport->port_state);
8172                 }
8173                 /* Indicate we are done walking fc_rscn_id_list on this vport */
8174                 vport->fc_rscn_flush = 0;
8175                 /* Send back ACC */
8176                 lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
8177                 /* send RECOVERY event for ALL nodes that match RSCN payload */
8178                 lpfc_rscn_recovery_check(vport);
8179                 return 0;
8180         }
8181         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
8182                 "RCV RSCN:        did:x%x/ste:x%x flg:x%x",
8183                 ndlp->nlp_DID, vport->port_state, ndlp->nlp_flag);
8184
8185         spin_lock_irq(shost->host_lock);
8186         vport->fc_flag |= FC_RSCN_MODE;
8187         spin_unlock_irq(shost->host_lock);
8188         vport->fc_rscn_id_list[vport->fc_rscn_id_cnt++] = pcmd;
8189         /* Indicate we are done walking fc_rscn_id_list on this vport */
8190         vport->fc_rscn_flush = 0;
8191         /*
8192          * If we zero, cmdiocb->cmd_dmabuf, the calling routine will
8193          * not try to free it.
8194          */
8195         cmdiocb->cmd_dmabuf = NULL;
8196         lpfc_set_disctmo(vport);
8197         /* Send back ACC */
8198         lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
8199         /* send RECOVERY event for ALL nodes that match RSCN payload */
8200         lpfc_rscn_recovery_check(vport);
8201         return lpfc_els_handle_rscn(vport);
8202 }
8203
8204 /**
8205  * lpfc_els_handle_rscn - Handle rscn for a vport
8206  * @vport: pointer to a host virtual N_Port data structure.
8207  *
8208  * This routine handles the Registration State Configuration Notification
8209  * (RSCN) for a @vport. If login to NameServer does not exist, a new ndlp shall
8210  * be created and a Port Login (PLOGI) to the NameServer is issued. Otherwise,
8211  * if the ndlp to NameServer exists, a Common Transport (CT) command to the
8212  * NameServer shall be issued. If CT command to the NameServer fails to be
8213  * issued, the lpfc_els_flush_rscn() routine shall be invoked to clean up any
8214  * RSCN activities with the @vport.
8215  *
8216  * Return code
8217  *   0 - Cleaned up rscn on the @vport
8218  *   1 - Wait for plogi to name server before proceed
8219  **/
8220 int
8221 lpfc_els_handle_rscn(struct lpfc_vport *vport)
8222 {
8223         struct lpfc_nodelist *ndlp;
8224         struct lpfc_hba  *phba = vport->phba;
8225
8226         /* Ignore RSCN if the port is being torn down. */
8227         if (vport->load_flag & FC_UNLOADING) {
8228                 lpfc_els_flush_rscn(vport);
8229                 return 0;
8230         }
8231
8232         /* Start timer for RSCN processing */
8233         lpfc_set_disctmo(vport);
8234
8235         /* RSCN processed */
8236         lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
8237                          "0215 RSCN processed Data: x%x x%x x%x x%x x%x x%x\n",
8238                          vport->fc_flag, 0, vport->fc_rscn_id_cnt,
8239                          vport->port_state, vport->num_disc_nodes,
8240                          vport->gidft_inp);
8241
8242         /* To process RSCN, first compare RSCN data with NameServer */
8243         vport->fc_ns_retry = 0;
8244         vport->num_disc_nodes = 0;
8245
8246         ndlp = lpfc_findnode_did(vport, NameServer_DID);
8247         if (ndlp && ndlp->nlp_state == NLP_STE_UNMAPPED_NODE) {
8248                 /* Good ndlp, issue CT Request to NameServer.  Need to
8249                  * know how many gidfts were issued.  If none, then just
8250                  * flush the RSCN.  Otherwise, the outstanding requests
8251                  * need to complete.
8252                  */
8253                 if (phba->cfg_ns_query == LPFC_NS_QUERY_GID_FT) {
8254                         if (lpfc_issue_gidft(vport) > 0)
8255                                 return 1;
8256                 } else if (phba->cfg_ns_query == LPFC_NS_QUERY_GID_PT) {
8257                         if (lpfc_issue_gidpt(vport) > 0)
8258                                 return 1;
8259                 } else {
8260                         return 1;
8261                 }
8262         } else {
8263                 /* Nameserver login in question.  Revalidate. */
8264                 if (ndlp) {
8265                         ndlp->nlp_prev_state = NLP_STE_UNUSED_NODE;
8266                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
8267                 } else {
8268                         ndlp = lpfc_nlp_init(vport, NameServer_DID);
8269                         if (!ndlp) {
8270                                 lpfc_els_flush_rscn(vport);
8271                                 return 0;
8272                         }
8273                         ndlp->nlp_prev_state = ndlp->nlp_state;
8274                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
8275                 }
8276                 ndlp->nlp_type |= NLP_FABRIC;
8277                 lpfc_issue_els_plogi(vport, NameServer_DID, 0);
8278                 /* Wait for NameServer login cmpl before we can
8279                  * continue
8280                  */
8281                 return 1;
8282         }
8283
8284         lpfc_els_flush_rscn(vport);
8285         return 0;
8286 }
8287
8288 /**
8289  * lpfc_els_rcv_flogi - Process an unsolicited flogi iocb
8290  * @vport: pointer to a host virtual N_Port data structure.
8291  * @cmdiocb: pointer to lpfc command iocb data structure.
8292  * @ndlp: pointer to a node-list data structure.
8293  *
8294  * This routine processes Fabric Login (FLOGI) IOCB received as an ELS
8295  * unsolicited event. An unsolicited FLOGI can be received in a point-to-
8296  * point topology. As an unsolicited FLOGI should not be received in a loop
8297  * mode, any unsolicited FLOGI received in loop mode shall be ignored. The
8298  * lpfc_check_sparm() routine is invoked to check the parameters in the
8299  * unsolicited FLOGI. If parameters validation failed, the routine
8300  * lpfc_els_rsp_reject() shall be called with reject reason code set to
8301  * LSEXP_SPARM_OPTIONS to reject the FLOGI. Otherwise, the Port WWN in the
8302  * FLOGI shall be compared with the Port WWN of the @vport to determine who
8303  * will initiate PLOGI. The higher lexicographical value party shall has
8304  * higher priority (as the winning port) and will initiate PLOGI and
8305  * communicate Port_IDs (Addresses) for both nodes in PLOGI. The result
8306  * of this will be marked in the @vport fc_flag field with FC_PT2PT_PLOGI
8307  * and then the lpfc_els_rsp_acc() routine is invoked to accept the FLOGI.
8308  *
8309  * Return code
8310  *   0 - Successfully processed the unsolicited flogi
8311  *   1 - Failed to process the unsolicited flogi
8312  **/
8313 static int
8314 lpfc_els_rcv_flogi(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
8315                    struct lpfc_nodelist *ndlp)
8316 {
8317         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
8318         struct lpfc_hba  *phba = vport->phba;
8319         struct lpfc_dmabuf *pcmd = cmdiocb->cmd_dmabuf;
8320         uint32_t *lp = (uint32_t *) pcmd->virt;
8321         union lpfc_wqe128 *wqe = &cmdiocb->wqe;
8322         struct serv_parm *sp;
8323         LPFC_MBOXQ_t *mbox;
8324         uint32_t cmd, did;
8325         int rc;
8326         uint32_t fc_flag = 0;
8327         uint32_t port_state = 0;
8328
8329         /* Clear external loopback plug detected flag */
8330         phba->link_flag &= ~LS_EXTERNAL_LOOPBACK;
8331
8332         cmd = *lp++;
8333         sp = (struct serv_parm *) lp;
8334
8335         /* FLOGI received */
8336
8337         lpfc_set_disctmo(vport);
8338
8339         if (phba->fc_topology == LPFC_TOPOLOGY_LOOP) {
8340                 /* We should never receive a FLOGI in loop mode, ignore it */
8341                 did =  bf_get(wqe_els_did, &wqe->xmit_els_rsp.wqe_dest);
8342
8343                 /* An FLOGI ELS command <elsCmd> was received from DID <did> in
8344                    Loop Mode */
8345                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
8346                                  "0113 An FLOGI ELS command x%x was "
8347                                  "received from DID x%x in Loop Mode\n",
8348                                  cmd, did);
8349                 return 1;
8350         }
8351
8352         (void) lpfc_check_sparm(vport, ndlp, sp, CLASS3, 1);
8353
8354         /*
8355          * If our portname is greater than the remote portname,
8356          * then we initiate Nport login.
8357          */
8358
8359         rc = memcmp(&vport->fc_portname, &sp->portName,
8360                     sizeof(struct lpfc_name));
8361
8362         if (!rc) {
8363                 if (phba->sli_rev < LPFC_SLI_REV4) {
8364                         mbox = mempool_alloc(phba->mbox_mem_pool,
8365                                              GFP_KERNEL);
8366                         if (!mbox)
8367                                 return 1;
8368                         lpfc_linkdown(phba);
8369                         lpfc_init_link(phba, mbox,
8370                                        phba->cfg_topology,
8371                                        phba->cfg_link_speed);
8372                         mbox->u.mb.un.varInitLnk.lipsr_AL_PA = 0;
8373                         mbox->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
8374                         mbox->vport = vport;
8375                         rc = lpfc_sli_issue_mbox(phba, mbox,
8376                                                  MBX_NOWAIT);
8377                         lpfc_set_loopback_flag(phba);
8378                         if (rc == MBX_NOT_FINISHED)
8379                                 mempool_free(mbox, phba->mbox_mem_pool);
8380                         return 1;
8381                 }
8382
8383                 /* External loopback plug insertion detected */
8384                 phba->link_flag |= LS_EXTERNAL_LOOPBACK;
8385
8386                 lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS | LOG_LIBDFC,
8387                                  "1119 External Loopback plug detected\n");
8388
8389                 /* abort the flogi coming back to ourselves
8390                  * due to external loopback on the port.
8391                  */
8392                 lpfc_els_abort_flogi(phba);
8393                 return 0;
8394
8395         } else if (rc > 0) {    /* greater than */
8396                 spin_lock_irq(shost->host_lock);
8397                 vport->fc_flag |= FC_PT2PT_PLOGI;
8398                 spin_unlock_irq(shost->host_lock);
8399
8400                 /* If we have the high WWPN we can assign our own
8401                  * myDID; otherwise, we have to WAIT for a PLOGI
8402                  * from the remote NPort to find out what it
8403                  * will be.
8404                  */
8405                 vport->fc_myDID = PT2PT_LocalID;
8406         } else {
8407                 vport->fc_myDID = PT2PT_RemoteID;
8408         }
8409
8410         /*
8411          * The vport state should go to LPFC_FLOGI only
8412          * AFTER we issue a FLOGI, not receive one.
8413          */
8414         spin_lock_irq(shost->host_lock);
8415         fc_flag = vport->fc_flag;
8416         port_state = vport->port_state;
8417         vport->fc_flag |= FC_PT2PT;
8418         vport->fc_flag &= ~(FC_FABRIC | FC_PUBLIC_LOOP);
8419
8420         /* Acking an unsol FLOGI.  Count 1 for link bounce
8421          * work-around.
8422          */
8423         vport->rcv_flogi_cnt++;
8424         spin_unlock_irq(shost->host_lock);
8425         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
8426                          "3311 Rcv Flogi PS x%x new PS x%x "
8427                          "fc_flag x%x new fc_flag x%x\n",
8428                          port_state, vport->port_state,
8429                          fc_flag, vport->fc_flag);
8430
8431         /*
8432          * We temporarily set fc_myDID to make it look like we are
8433          * a Fabric. This is done just so we end up with the right
8434          * did / sid on the FLOGI ACC rsp.
8435          */
8436         did = vport->fc_myDID;
8437         vport->fc_myDID = Fabric_DID;
8438
8439         memcpy(&phba->fc_fabparam, sp, sizeof(struct serv_parm));
8440
8441         /* Defer ACC response until AFTER we issue a FLOGI */
8442         if (!(phba->hba_flag & HBA_FLOGI_ISSUED)) {
8443                 phba->defer_flogi_acc_rx_id = bf_get(wqe_ctxt_tag,
8444                                                      &wqe->xmit_els_rsp.wqe_com);
8445                 phba->defer_flogi_acc_ox_id = bf_get(wqe_rcvoxid,
8446                                                      &wqe->xmit_els_rsp.wqe_com);
8447
8448                 vport->fc_myDID = did;
8449
8450                 lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
8451                                  "3344 Deferring FLOGI ACC: rx_id: x%x,"
8452                                  " ox_id: x%x, hba_flag x%x\n",
8453                                  phba->defer_flogi_acc_rx_id,
8454                                  phba->defer_flogi_acc_ox_id, phba->hba_flag);
8455
8456                 phba->defer_flogi_acc_flag = true;
8457
8458                 return 0;
8459         }
8460
8461         /* Send back ACC */
8462         lpfc_els_rsp_acc(vport, ELS_CMD_FLOGI, cmdiocb, ndlp, NULL);
8463
8464         /* Now lets put fc_myDID back to what its supposed to be */
8465         vport->fc_myDID = did;
8466
8467         return 0;
8468 }
8469
8470 /**
8471  * lpfc_els_rcv_rnid - Process an unsolicited rnid iocb
8472  * @vport: pointer to a host virtual N_Port data structure.
8473  * @cmdiocb: pointer to lpfc command iocb data structure.
8474  * @ndlp: pointer to a node-list data structure.
8475  *
8476  * This routine processes Request Node Identification Data (RNID) IOCB
8477  * received as an ELS unsolicited event. Only when the RNID specified format
8478  * 0x0 or 0xDF (Topology Discovery Specific Node Identification Data)
8479  * present, this routine will invoke the lpfc_els_rsp_rnid_acc() routine to
8480  * Accept (ACC) the RNID ELS command. All the other RNID formats are
8481  * rejected by invoking the lpfc_els_rsp_reject() routine.
8482  *
8483  * Return code
8484  *   0 - Successfully processed rnid iocb (currently always return 0)
8485  **/
8486 static int
8487 lpfc_els_rcv_rnid(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
8488                   struct lpfc_nodelist *ndlp)
8489 {
8490         struct lpfc_dmabuf *pcmd;
8491         uint32_t *lp;
8492         RNID *rn;
8493         struct ls_rjt stat;
8494
8495         pcmd = cmdiocb->cmd_dmabuf;
8496         lp = (uint32_t *) pcmd->virt;
8497
8498         lp++;
8499         rn = (RNID *) lp;
8500
8501         /* RNID received */
8502
8503         switch (rn->Format) {
8504         case 0:
8505         case RNID_TOPOLOGY_DISC:
8506                 /* Send back ACC */
8507                 lpfc_els_rsp_rnid_acc(vport, rn->Format, cmdiocb, ndlp);
8508                 break;
8509         default:
8510                 /* Reject this request because format not supported */
8511                 stat.un.b.lsRjtRsvd0 = 0;
8512                 stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
8513                 stat.un.b.lsRjtRsnCodeExp = LSEXP_CANT_GIVE_DATA;
8514                 stat.un.b.vendorUnique = 0;
8515                 lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp,
8516                         NULL);
8517         }
8518         return 0;
8519 }
8520
8521 /**
8522  * lpfc_els_rcv_echo - Process an unsolicited echo iocb
8523  * @vport: pointer to a host virtual N_Port data structure.
8524  * @cmdiocb: pointer to lpfc command iocb data structure.
8525  * @ndlp: pointer to a node-list data structure.
8526  *
8527  * Return code
8528  *   0 - Successfully processed echo iocb (currently always return 0)
8529  **/
8530 static int
8531 lpfc_els_rcv_echo(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
8532                   struct lpfc_nodelist *ndlp)
8533 {
8534         uint8_t *pcmd;
8535
8536         pcmd = (uint8_t *)cmdiocb->cmd_dmabuf->virt;
8537
8538         /* skip over first word of echo command to find echo data */
8539         pcmd += sizeof(uint32_t);
8540
8541         lpfc_els_rsp_echo_acc(vport, pcmd, cmdiocb, ndlp);
8542         return 0;
8543 }
8544
8545 /**
8546  * lpfc_els_rcv_lirr - Process an unsolicited lirr iocb
8547  * @vport: pointer to a host virtual N_Port data structure.
8548  * @cmdiocb: pointer to lpfc command iocb data structure.
8549  * @ndlp: pointer to a node-list data structure.
8550  *
8551  * This routine processes a Link Incident Report Registration(LIRR) IOCB
8552  * received as an ELS unsolicited event. Currently, this function just invokes
8553  * the lpfc_els_rsp_reject() routine to reject the LIRR IOCB unconditionally.
8554  *
8555  * Return code
8556  *   0 - Successfully processed lirr iocb (currently always return 0)
8557  **/
8558 static int
8559 lpfc_els_rcv_lirr(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
8560                   struct lpfc_nodelist *ndlp)
8561 {
8562         struct ls_rjt stat;
8563
8564         /* For now, unconditionally reject this command */
8565         stat.un.b.lsRjtRsvd0 = 0;
8566         stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
8567         stat.un.b.lsRjtRsnCodeExp = LSEXP_CANT_GIVE_DATA;
8568         stat.un.b.vendorUnique = 0;
8569         lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
8570         return 0;
8571 }
8572
8573 /**
8574  * lpfc_els_rcv_rrq - Process an unsolicited rrq iocb
8575  * @vport: pointer to a host virtual N_Port data structure.
8576  * @cmdiocb: pointer to lpfc command iocb data structure.
8577  * @ndlp: pointer to a node-list data structure.
8578  *
8579  * This routine processes a Reinstate Recovery Qualifier (RRQ) IOCB
8580  * received as an ELS unsolicited event. A request to RRQ shall only
8581  * be accepted if the Originator Nx_Port N_Port_ID or the Responder
8582  * Nx_Port N_Port_ID of the target Exchange is the same as the
8583  * N_Port_ID of the Nx_Port that makes the request. If the RRQ is
8584  * not accepted, an LS_RJT with reason code "Unable to perform
8585  * command request" and reason code explanation "Invalid Originator
8586  * S_ID" shall be returned. For now, we just unconditionally accept
8587  * RRQ from the target.
8588  **/
8589 static void
8590 lpfc_els_rcv_rrq(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
8591                  struct lpfc_nodelist *ndlp)
8592 {
8593         lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
8594         if (vport->phba->sli_rev == LPFC_SLI_REV4)
8595                 lpfc_els_clear_rrq(vport, cmdiocb, ndlp);
8596 }
8597
8598 /**
8599  * lpfc_els_rsp_rls_acc - Completion callbk func for MBX_READ_LNK_STAT mbox cmd
8600  * @phba: pointer to lpfc hba data structure.
8601  * @pmb: pointer to the driver internal queue element for mailbox command.
8602  *
8603  * This routine is the completion callback function for the MBX_READ_LNK_STAT
8604  * mailbox command. This callback function is to actually send the Accept
8605  * (ACC) response to a Read Link Status (RLS) unsolicited IOCB event. It
8606  * collects the link statistics from the completion of the MBX_READ_LNK_STAT
8607  * mailbox command, constructs the RLS response with the link statistics
8608  * collected, and then invokes the lpfc_sli_issue_iocb() routine to send ACC
8609  * response to the RLS.
8610  *
8611  * Note that the ndlp reference count will be incremented by 1 for holding the
8612  * ndlp and the reference to ndlp will be stored into the ndlp field of
8613  * the IOCB for the completion callback function to the RLS Accept Response
8614  * ELS IOCB command.
8615  *
8616  **/
8617 static void
8618 lpfc_els_rsp_rls_acc(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
8619 {
8620         int rc = 0;
8621         MAILBOX_t *mb;
8622         IOCB_t *icmd;
8623         union lpfc_wqe128 *wqe;
8624         struct RLS_RSP *rls_rsp;
8625         uint8_t *pcmd;
8626         struct lpfc_iocbq *elsiocb;
8627         struct lpfc_nodelist *ndlp;
8628         uint16_t oxid;
8629         uint16_t rxid;
8630         uint32_t cmdsize;
8631         u32 ulp_context;
8632
8633         mb = &pmb->u.mb;
8634
8635         ndlp = pmb->ctx_ndlp;
8636         rxid = (uint16_t)((unsigned long)(pmb->ctx_buf) & 0xffff);
8637         oxid = (uint16_t)(((unsigned long)(pmb->ctx_buf) >> 16) & 0xffff);
8638         pmb->ctx_buf = NULL;
8639         pmb->ctx_ndlp = NULL;
8640
8641         if (mb->mbxStatus) {
8642                 mempool_free(pmb, phba->mbox_mem_pool);
8643                 return;
8644         }
8645
8646         cmdsize = sizeof(struct RLS_RSP) + sizeof(uint32_t);
8647         elsiocb = lpfc_prep_els_iocb(phba->pport, 0, cmdsize,
8648                                      lpfc_max_els_tries, ndlp,
8649                                      ndlp->nlp_DID, ELS_CMD_ACC);
8650
8651         /* Decrement the ndlp reference count from previous mbox command */
8652         lpfc_nlp_put(ndlp);
8653
8654         if (!elsiocb) {
8655                 mempool_free(pmb, phba->mbox_mem_pool);
8656                 return;
8657         }
8658
8659         ulp_context = get_job_ulpcontext(phba, elsiocb);
8660         if (phba->sli_rev == LPFC_SLI_REV4) {
8661                 wqe = &elsiocb->wqe;
8662                 /* Xri / rx_id */
8663                 bf_set(wqe_ctxt_tag, &wqe->generic.wqe_com, rxid);
8664                 bf_set(wqe_rcvoxid, &wqe->xmit_els_rsp.wqe_com, oxid);
8665         } else {
8666                 icmd = &elsiocb->iocb;
8667                 icmd->ulpContext = rxid;
8668                 icmd->unsli3.rcvsli3.ox_id = oxid;
8669         }
8670
8671         pcmd = (uint8_t *)elsiocb->cmd_dmabuf->virt;
8672         *((uint32_t *) (pcmd)) = ELS_CMD_ACC;
8673         pcmd += sizeof(uint32_t); /* Skip past command */
8674         rls_rsp = (struct RLS_RSP *)pcmd;
8675
8676         rls_rsp->linkFailureCnt = cpu_to_be32(mb->un.varRdLnk.linkFailureCnt);
8677         rls_rsp->lossSyncCnt = cpu_to_be32(mb->un.varRdLnk.lossSyncCnt);
8678         rls_rsp->lossSignalCnt = cpu_to_be32(mb->un.varRdLnk.lossSignalCnt);
8679         rls_rsp->primSeqErrCnt = cpu_to_be32(mb->un.varRdLnk.primSeqErrCnt);
8680         rls_rsp->invalidXmitWord = cpu_to_be32(mb->un.varRdLnk.invalidXmitWord);
8681         rls_rsp->crcCnt = cpu_to_be32(mb->un.varRdLnk.crcCnt);
8682         mempool_free(pmb, phba->mbox_mem_pool);
8683         /* Xmit ELS RLS ACC response tag <ulpIoTag> */
8684         lpfc_printf_vlog(ndlp->vport, KERN_INFO, LOG_ELS,
8685                          "2874 Xmit ELS RLS ACC response tag x%x xri x%x, "
8686                          "did x%x, nlp_flag x%x, nlp_state x%x, rpi x%x\n",
8687                          elsiocb->iotag, ulp_context,
8688                          ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
8689                          ndlp->nlp_rpi);
8690         elsiocb->cmd_cmpl = lpfc_cmpl_els_rsp;
8691         phba->fc_stat.elsXmitACC++;
8692         elsiocb->ndlp = lpfc_nlp_get(ndlp);
8693         if (!elsiocb->ndlp) {
8694                 lpfc_els_free_iocb(phba, elsiocb);
8695                 return;
8696         }
8697
8698         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
8699         if (rc == IOCB_ERROR) {
8700                 lpfc_els_free_iocb(phba, elsiocb);
8701                 lpfc_nlp_put(ndlp);
8702         }
8703         return;
8704 }
8705
8706 /**
8707  * lpfc_els_rcv_rls - Process an unsolicited rls iocb
8708  * @vport: pointer to a host virtual N_Port data structure.
8709  * @cmdiocb: pointer to lpfc command iocb data structure.
8710  * @ndlp: pointer to a node-list data structure.
8711  *
8712  * This routine processes Read Link Status (RLS) IOCB received as an
8713  * ELS unsolicited event. It first checks the remote port state. If the
8714  * remote port is not in NLP_STE_UNMAPPED_NODE state or NLP_STE_MAPPED_NODE
8715  * state, it invokes the lpfc_els_rsl_reject() routine to send the reject
8716  * response. Otherwise, it issue the MBX_READ_LNK_STAT mailbox command
8717  * for reading the HBA link statistics. It is for the callback function,
8718  * lpfc_els_rsp_rls_acc(), set to the MBX_READ_LNK_STAT mailbox command
8719  * to actually sending out RPL Accept (ACC) response.
8720  *
8721  * Return codes
8722  *   0 - Successfully processed rls iocb (currently always return 0)
8723  **/
8724 static int
8725 lpfc_els_rcv_rls(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
8726                  struct lpfc_nodelist *ndlp)
8727 {
8728         struct lpfc_hba *phba = vport->phba;
8729         LPFC_MBOXQ_t *mbox;
8730         struct ls_rjt stat;
8731         u32 ctx = get_job_ulpcontext(phba, cmdiocb);
8732         u32 ox_id = get_job_rcvoxid(phba, cmdiocb);
8733
8734         if ((ndlp->nlp_state != NLP_STE_UNMAPPED_NODE) &&
8735             (ndlp->nlp_state != NLP_STE_MAPPED_NODE))
8736                 /* reject the unsolicited RLS request and done with it */
8737                 goto reject_out;
8738
8739         mbox = mempool_alloc(phba->mbox_mem_pool, GFP_ATOMIC);
8740         if (mbox) {
8741                 lpfc_read_lnk_stat(phba, mbox);
8742                 mbox->ctx_buf = (void *)((unsigned long)
8743                                          (ox_id << 16 | ctx));
8744                 mbox->ctx_ndlp = lpfc_nlp_get(ndlp);
8745                 if (!mbox->ctx_ndlp)
8746                         goto node_err;
8747                 mbox->vport = vport;
8748                 mbox->mbox_cmpl = lpfc_els_rsp_rls_acc;
8749                 if (lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT)
8750                         != MBX_NOT_FINISHED)
8751                         /* Mbox completion will send ELS Response */
8752                         return 0;
8753                 /* Decrement reference count used for the failed mbox
8754                  * command.
8755                  */
8756                 lpfc_nlp_put(ndlp);
8757 node_err:
8758                 mempool_free(mbox, phba->mbox_mem_pool);
8759         }
8760 reject_out:
8761         /* issue rejection response */
8762         stat.un.b.lsRjtRsvd0 = 0;
8763         stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
8764         stat.un.b.lsRjtRsnCodeExp = LSEXP_CANT_GIVE_DATA;
8765         stat.un.b.vendorUnique = 0;
8766         lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
8767         return 0;
8768 }
8769
8770 /**
8771  * lpfc_els_rcv_rtv - Process an unsolicited rtv iocb
8772  * @vport: pointer to a host virtual N_Port data structure.
8773  * @cmdiocb: pointer to lpfc command iocb data structure.
8774  * @ndlp: pointer to a node-list data structure.
8775  *
8776  * This routine processes Read Timout Value (RTV) IOCB received as an
8777  * ELS unsolicited event. It first checks the remote port state. If the
8778  * remote port is not in NLP_STE_UNMAPPED_NODE state or NLP_STE_MAPPED_NODE
8779  * state, it invokes the lpfc_els_rsl_reject() routine to send the reject
8780  * response. Otherwise, it sends the Accept(ACC) response to a Read Timeout
8781  * Value (RTV) unsolicited IOCB event.
8782  *
8783  * Note that the ndlp reference count will be incremented by 1 for holding the
8784  * ndlp and the reference to ndlp will be stored into the ndlp field of
8785  * the IOCB for the completion callback function to the RTV Accept Response
8786  * ELS IOCB command.
8787  *
8788  * Return codes
8789  *   0 - Successfully processed rtv iocb (currently always return 0)
8790  **/
8791 static int
8792 lpfc_els_rcv_rtv(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
8793                  struct lpfc_nodelist *ndlp)
8794 {
8795         int rc = 0;
8796         IOCB_t *icmd;
8797         union lpfc_wqe128 *wqe;
8798         struct lpfc_hba *phba = vport->phba;
8799         struct ls_rjt stat;
8800         struct RTV_RSP *rtv_rsp;
8801         uint8_t *pcmd;
8802         struct lpfc_iocbq *elsiocb;
8803         uint32_t cmdsize;
8804         u32 ulp_context;
8805
8806         if ((ndlp->nlp_state != NLP_STE_UNMAPPED_NODE) &&
8807             (ndlp->nlp_state != NLP_STE_MAPPED_NODE))
8808                 /* reject the unsolicited RTV request and done with it */
8809                 goto reject_out;
8810
8811         cmdsize = sizeof(struct RTV_RSP) + sizeof(uint32_t);
8812         elsiocb = lpfc_prep_els_iocb(phba->pport, 0, cmdsize,
8813                                      lpfc_max_els_tries, ndlp,
8814                                      ndlp->nlp_DID, ELS_CMD_ACC);
8815
8816         if (!elsiocb)
8817                 return 1;
8818
8819         pcmd = (uint8_t *)elsiocb->cmd_dmabuf->virt;
8820         *((uint32_t *) (pcmd)) = ELS_CMD_ACC;
8821         pcmd += sizeof(uint32_t); /* Skip past command */
8822
8823         ulp_context = get_job_ulpcontext(phba, elsiocb);
8824         /* use the command's xri in the response */
8825         if (phba->sli_rev == LPFC_SLI_REV4) {
8826                 wqe = &elsiocb->wqe;
8827                 bf_set(wqe_ctxt_tag, &wqe->generic.wqe_com,
8828                        get_job_ulpcontext(phba, cmdiocb));
8829                 bf_set(wqe_rcvoxid, &wqe->xmit_els_rsp.wqe_com,
8830                        get_job_rcvoxid(phba, cmdiocb));
8831         } else {
8832                 icmd = &elsiocb->iocb;
8833                 icmd->ulpContext = get_job_ulpcontext(phba, cmdiocb);
8834                 icmd->unsli3.rcvsli3.ox_id = get_job_rcvoxid(phba, cmdiocb);
8835         }
8836
8837         rtv_rsp = (struct RTV_RSP *)pcmd;
8838
8839         /* populate RTV payload */
8840         rtv_rsp->ratov = cpu_to_be32(phba->fc_ratov * 1000); /* report msecs */
8841         rtv_rsp->edtov = cpu_to_be32(phba->fc_edtov);
8842         bf_set(qtov_edtovres, rtv_rsp, phba->fc_edtovResol ? 1 : 0);
8843         bf_set(qtov_rttov, rtv_rsp, 0); /* Field is for FC ONLY */
8844         rtv_rsp->qtov = cpu_to_be32(rtv_rsp->qtov);
8845
8846         /* Xmit ELS RLS ACC response tag <ulpIoTag> */
8847         lpfc_printf_vlog(ndlp->vport, KERN_INFO, LOG_ELS,
8848                          "2875 Xmit ELS RTV ACC response tag x%x xri x%x, "
8849                          "did x%x, nlp_flag x%x, nlp_state x%x, rpi x%x, "
8850                          "Data: x%x x%x x%x\n",
8851                          elsiocb->iotag, ulp_context,
8852                          ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
8853                          ndlp->nlp_rpi,
8854                         rtv_rsp->ratov, rtv_rsp->edtov, rtv_rsp->qtov);
8855         elsiocb->cmd_cmpl = lpfc_cmpl_els_rsp;
8856         phba->fc_stat.elsXmitACC++;
8857         elsiocb->ndlp = lpfc_nlp_get(ndlp);
8858         if (!elsiocb->ndlp) {
8859                 lpfc_els_free_iocb(phba, elsiocb);
8860                 return 0;
8861         }
8862
8863         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
8864         if (rc == IOCB_ERROR) {
8865                 lpfc_els_free_iocb(phba, elsiocb);
8866                 lpfc_nlp_put(ndlp);
8867         }
8868         return 0;
8869
8870 reject_out:
8871         /* issue rejection response */
8872         stat.un.b.lsRjtRsvd0 = 0;
8873         stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
8874         stat.un.b.lsRjtRsnCodeExp = LSEXP_CANT_GIVE_DATA;
8875         stat.un.b.vendorUnique = 0;
8876         lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
8877         return 0;
8878 }
8879
8880 /* lpfc_issue_els_rrq - Process an unsolicited rrq iocb
8881  * @vport: pointer to a host virtual N_Port data structure.
8882  * @ndlp: pointer to a node-list data structure.
8883  * @did: DID of the target.
8884  * @rrq: Pointer to the rrq struct.
8885  *
8886  * Build a ELS RRQ command and send it to the target. If the issue_iocb is
8887  * successful, the completion handler will clear the RRQ.
8888  *
8889  * Return codes
8890  *   0 - Successfully sent rrq els iocb.
8891  *   1 - Failed to send rrq els iocb.
8892  **/
8893 static int
8894 lpfc_issue_els_rrq(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
8895                         uint32_t did, struct lpfc_node_rrq *rrq)
8896 {
8897         struct lpfc_hba  *phba = vport->phba;
8898         struct RRQ *els_rrq;
8899         struct lpfc_iocbq *elsiocb;
8900         uint8_t *pcmd;
8901         uint16_t cmdsize;
8902         int ret;
8903
8904         if (!ndlp)
8905                 return 1;
8906
8907         /* If ndlp is not NULL, we will bump the reference count on it */
8908         cmdsize = (sizeof(uint32_t) + sizeof(struct RRQ));
8909         elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, 0, ndlp, did,
8910                                      ELS_CMD_RRQ);
8911         if (!elsiocb)
8912                 return 1;
8913
8914         pcmd = (uint8_t *)elsiocb->cmd_dmabuf->virt;
8915
8916         /* For RRQ request, remainder of payload is Exchange IDs */
8917         *((uint32_t *) (pcmd)) = ELS_CMD_RRQ;
8918         pcmd += sizeof(uint32_t);
8919         els_rrq = (struct RRQ *) pcmd;
8920
8921         bf_set(rrq_oxid, els_rrq, phba->sli4_hba.xri_ids[rrq->xritag]);
8922         bf_set(rrq_rxid, els_rrq, rrq->rxid);
8923         bf_set(rrq_did, els_rrq, vport->fc_myDID);
8924         els_rrq->rrq = cpu_to_be32(els_rrq->rrq);
8925         els_rrq->rrq_exchg = cpu_to_be32(els_rrq->rrq_exchg);
8926
8927
8928         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
8929                 "Issue RRQ:     did:x%x",
8930                 did, rrq->xritag, rrq->rxid);
8931         elsiocb->context_un.rrq = rrq;
8932         elsiocb->cmd_cmpl = lpfc_cmpl_els_rrq;
8933
8934         elsiocb->ndlp = lpfc_nlp_get(ndlp);
8935         if (!elsiocb->ndlp)
8936                 goto io_err;
8937
8938         ret = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
8939         if (ret == IOCB_ERROR) {
8940                 lpfc_nlp_put(ndlp);
8941                 goto io_err;
8942         }
8943         return 0;
8944
8945  io_err:
8946         lpfc_els_free_iocb(phba, elsiocb);
8947         return 1;
8948 }
8949
8950 /**
8951  * lpfc_send_rrq - Sends ELS RRQ if needed.
8952  * @phba: pointer to lpfc hba data structure.
8953  * @rrq: pointer to the active rrq.
8954  *
8955  * This routine will call the lpfc_issue_els_rrq if the rrq is
8956  * still active for the xri. If this function returns a failure then
8957  * the caller needs to clean up the RRQ by calling lpfc_clr_active_rrq.
8958  *
8959  * Returns 0 Success.
8960  *         1 Failure.
8961  **/
8962 int
8963 lpfc_send_rrq(struct lpfc_hba *phba, struct lpfc_node_rrq *rrq)
8964 {
8965         struct lpfc_nodelist *ndlp = lpfc_findnode_did(rrq->vport,
8966                                                        rrq->nlp_DID);
8967         if (!ndlp)
8968                 return 1;
8969
8970         if (lpfc_test_rrq_active(phba, ndlp, rrq->xritag))
8971                 return lpfc_issue_els_rrq(rrq->vport, ndlp,
8972                                          rrq->nlp_DID, rrq);
8973         else
8974                 return 1;
8975 }
8976
8977 /**
8978  * lpfc_els_rsp_rpl_acc - Issue an accept rpl els command
8979  * @vport: pointer to a host virtual N_Port data structure.
8980  * @cmdsize: size of the ELS command.
8981  * @oldiocb: pointer to the original lpfc command iocb data structure.
8982  * @ndlp: pointer to a node-list data structure.
8983  *
8984  * This routine issuees an Accept (ACC) Read Port List (RPL) ELS command.
8985  * It is to be called by the lpfc_els_rcv_rpl() routine to accept the RPL.
8986  *
8987  * Note that the ndlp reference count will be incremented by 1 for holding the
8988  * ndlp and the reference to ndlp will be stored into the ndlp field of
8989  * the IOCB for the completion callback function to the RPL Accept Response
8990  * ELS command.
8991  *
8992  * Return code
8993  *   0 - Successfully issued ACC RPL ELS command
8994  *   1 - Failed to issue ACC RPL ELS command
8995  **/
8996 static int
8997 lpfc_els_rsp_rpl_acc(struct lpfc_vport *vport, uint16_t cmdsize,
8998                      struct lpfc_iocbq *oldiocb, struct lpfc_nodelist *ndlp)
8999 {
9000         int rc = 0;
9001         struct lpfc_hba *phba = vport->phba;
9002         IOCB_t *icmd;
9003         union lpfc_wqe128 *wqe;
9004         RPL_RSP rpl_rsp;
9005         struct lpfc_iocbq *elsiocb;
9006         uint8_t *pcmd;
9007         u32 ulp_context;
9008
9009         elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, oldiocb->retry, ndlp,
9010                                      ndlp->nlp_DID, ELS_CMD_ACC);
9011
9012         if (!elsiocb)
9013                 return 1;
9014
9015         ulp_context = get_job_ulpcontext(phba, elsiocb);
9016         if (phba->sli_rev == LPFC_SLI_REV4) {
9017                 wqe = &elsiocb->wqe;
9018                 /* Xri / rx_id */
9019                 bf_set(wqe_ctxt_tag, &wqe->generic.wqe_com,
9020                        get_job_ulpcontext(phba, oldiocb));
9021                 bf_set(wqe_rcvoxid, &wqe->xmit_els_rsp.wqe_com,
9022                        get_job_rcvoxid(phba, oldiocb));
9023         } else {
9024                 icmd = &elsiocb->iocb;
9025                 icmd->ulpContext = get_job_ulpcontext(phba, oldiocb);
9026                 icmd->unsli3.rcvsli3.ox_id = get_job_rcvoxid(phba, oldiocb);
9027         }
9028
9029         pcmd = elsiocb->cmd_dmabuf->virt;
9030         *((uint32_t *) (pcmd)) = ELS_CMD_ACC;
9031         pcmd += sizeof(uint16_t);
9032         *((uint16_t *)(pcmd)) = be16_to_cpu(cmdsize);
9033         pcmd += sizeof(uint16_t);
9034
9035         /* Setup the RPL ACC payload */
9036         rpl_rsp.listLen = be32_to_cpu(1);
9037         rpl_rsp.index = 0;
9038         rpl_rsp.port_num_blk.portNum = 0;
9039         rpl_rsp.port_num_blk.portID = be32_to_cpu(vport->fc_myDID);
9040         memcpy(&rpl_rsp.port_num_blk.portName, &vport->fc_portname,
9041             sizeof(struct lpfc_name));
9042         memcpy(pcmd, &rpl_rsp, cmdsize - sizeof(uint32_t));
9043         /* Xmit ELS RPL ACC response tag <ulpIoTag> */
9044         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
9045                          "0120 Xmit ELS RPL ACC response tag x%x "
9046                          "xri x%x, did x%x, nlp_flag x%x, nlp_state x%x, "
9047                          "rpi x%x\n",
9048                          elsiocb->iotag, ulp_context,
9049                          ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
9050                          ndlp->nlp_rpi);
9051         elsiocb->cmd_cmpl = lpfc_cmpl_els_rsp;
9052         phba->fc_stat.elsXmitACC++;
9053         elsiocb->ndlp = lpfc_nlp_get(ndlp);
9054         if (!elsiocb->ndlp) {
9055                 lpfc_els_free_iocb(phba, elsiocb);
9056                 return 1;
9057         }
9058
9059         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
9060         if (rc == IOCB_ERROR) {
9061                 lpfc_els_free_iocb(phba, elsiocb);
9062                 lpfc_nlp_put(ndlp);
9063                 return 1;
9064         }
9065
9066         return 0;
9067 }
9068
9069 /**
9070  * lpfc_els_rcv_rpl - Process an unsolicited rpl iocb
9071  * @vport: pointer to a host virtual N_Port data structure.
9072  * @cmdiocb: pointer to lpfc command iocb data structure.
9073  * @ndlp: pointer to a node-list data structure.
9074  *
9075  * This routine processes Read Port List (RPL) IOCB received as an ELS
9076  * unsolicited event. It first checks the remote port state. If the remote
9077  * port is not in NLP_STE_UNMAPPED_NODE and NLP_STE_MAPPED_NODE states, it
9078  * invokes the lpfc_els_rsp_reject() routine to send reject response.
9079  * Otherwise, this routine then invokes the lpfc_els_rsp_rpl_acc() routine
9080  * to accept the RPL.
9081  *
9082  * Return code
9083  *   0 - Successfully processed rpl iocb (currently always return 0)
9084  **/
9085 static int
9086 lpfc_els_rcv_rpl(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
9087                  struct lpfc_nodelist *ndlp)
9088 {
9089         struct lpfc_dmabuf *pcmd;
9090         uint32_t *lp;
9091         uint32_t maxsize;
9092         uint16_t cmdsize;
9093         RPL *rpl;
9094         struct ls_rjt stat;
9095
9096         if ((ndlp->nlp_state != NLP_STE_UNMAPPED_NODE) &&
9097             (ndlp->nlp_state != NLP_STE_MAPPED_NODE)) {
9098                 /* issue rejection response */
9099                 stat.un.b.lsRjtRsvd0 = 0;
9100                 stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
9101                 stat.un.b.lsRjtRsnCodeExp = LSEXP_CANT_GIVE_DATA;
9102                 stat.un.b.vendorUnique = 0;
9103                 lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp,
9104                         NULL);
9105                 /* rejected the unsolicited RPL request and done with it */
9106                 return 0;
9107         }
9108
9109         pcmd = cmdiocb->cmd_dmabuf;
9110         lp = (uint32_t *) pcmd->virt;
9111         rpl = (RPL *) (lp + 1);
9112         maxsize = be32_to_cpu(rpl->maxsize);
9113
9114         /* We support only one port */
9115         if ((rpl->index == 0) &&
9116             ((maxsize == 0) ||
9117              ((maxsize * sizeof(uint32_t)) >= sizeof(RPL_RSP)))) {
9118                 cmdsize = sizeof(uint32_t) + sizeof(RPL_RSP);
9119         } else {
9120                 cmdsize = sizeof(uint32_t) + maxsize * sizeof(uint32_t);
9121         }
9122         lpfc_els_rsp_rpl_acc(vport, cmdsize, cmdiocb, ndlp);
9123
9124         return 0;
9125 }
9126
9127 /**
9128  * lpfc_els_rcv_farp - Process an unsolicited farp request els command
9129  * @vport: pointer to a virtual N_Port data structure.
9130  * @cmdiocb: pointer to lpfc command iocb data structure.
9131  * @ndlp: pointer to a node-list data structure.
9132  *
9133  * This routine processes Fibre Channel Address Resolution Protocol
9134  * (FARP) Request IOCB received as an ELS unsolicited event. Currently,
9135  * the lpfc driver only supports matching on WWPN or WWNN for FARP. As such,
9136  * FARP_MATCH_PORT flag and FARP_MATCH_NODE flag are checked against the
9137  * Match Flag in the FARP request IOCB: if FARP_MATCH_PORT flag is set, the
9138  * remote PortName is compared against the FC PortName stored in the @vport
9139  * data structure; if FARP_MATCH_NODE flag is set, the remote NodeName is
9140  * compared against the FC NodeName stored in the @vport data structure.
9141  * If any of these matches and the FARP_REQUEST_FARPR flag is set in the
9142  * FARP request IOCB Response Flag, the lpfc_issue_els_farpr() routine is
9143  * invoked to send out FARP Response to the remote node. Before sending the
9144  * FARP Response, however, the FARP_REQUEST_PLOGI flag is check in the FARP
9145  * request IOCB Response Flag and, if it is set, the lpfc_issue_els_plogi()
9146  * routine is invoked to log into the remote port first.
9147  *
9148  * Return code
9149  *   0 - Either the FARP Match Mode not supported or successfully processed
9150  **/
9151 static int
9152 lpfc_els_rcv_farp(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
9153                   struct lpfc_nodelist *ndlp)
9154 {
9155         struct lpfc_dmabuf *pcmd;
9156         uint32_t *lp;
9157         FARP *fp;
9158         uint32_t cnt, did;
9159
9160         did = get_job_els_rsp64_did(vport->phba, cmdiocb);
9161         pcmd = cmdiocb->cmd_dmabuf;
9162         lp = (uint32_t *) pcmd->virt;
9163
9164         lp++;
9165         fp = (FARP *) lp;
9166         /* FARP-REQ received from DID <did> */
9167         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
9168                          "0601 FARP-REQ received from DID x%x\n", did);
9169         /* We will only support match on WWPN or WWNN */
9170         if (fp->Mflags & ~(FARP_MATCH_NODE | FARP_MATCH_PORT)) {
9171                 return 0;
9172         }
9173
9174         cnt = 0;
9175         /* If this FARP command is searching for my portname */
9176         if (fp->Mflags & FARP_MATCH_PORT) {
9177                 if (memcmp(&fp->RportName, &vport->fc_portname,
9178                            sizeof(struct lpfc_name)) == 0)
9179                         cnt = 1;
9180         }
9181
9182         /* If this FARP command is searching for my nodename */
9183         if (fp->Mflags & FARP_MATCH_NODE) {
9184                 if (memcmp(&fp->RnodeName, &vport->fc_nodename,
9185                            sizeof(struct lpfc_name)) == 0)
9186                         cnt = 1;
9187         }
9188
9189         if (cnt) {
9190                 if ((ndlp->nlp_state == NLP_STE_UNMAPPED_NODE) ||
9191                    (ndlp->nlp_state == NLP_STE_MAPPED_NODE)) {
9192                         /* Log back into the node before sending the FARP. */
9193                         if (fp->Rflags & FARP_REQUEST_PLOGI) {
9194                                 ndlp->nlp_prev_state = ndlp->nlp_state;
9195                                 lpfc_nlp_set_state(vport, ndlp,
9196                                                    NLP_STE_PLOGI_ISSUE);
9197                                 lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0);
9198                         }
9199
9200                         /* Send a FARP response to that node */
9201                         if (fp->Rflags & FARP_REQUEST_FARPR)
9202                                 lpfc_issue_els_farpr(vport, did, 0);
9203                 }
9204         }
9205         return 0;
9206 }
9207
9208 /**
9209  * lpfc_els_rcv_farpr - Process an unsolicited farp response iocb
9210  * @vport: pointer to a host virtual N_Port data structure.
9211  * @cmdiocb: pointer to lpfc command iocb data structure.
9212  * @ndlp: pointer to a node-list data structure.
9213  *
9214  * This routine processes Fibre Channel Address Resolution Protocol
9215  * Response (FARPR) IOCB received as an ELS unsolicited event. It simply
9216  * invokes the lpfc_els_rsp_acc() routine to the remote node to accept
9217  * the FARP response request.
9218  *
9219  * Return code
9220  *   0 - Successfully processed FARPR IOCB (currently always return 0)
9221  **/
9222 static int
9223 lpfc_els_rcv_farpr(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
9224                    struct lpfc_nodelist  *ndlp)
9225 {
9226         uint32_t did;
9227
9228         did = get_job_els_rsp64_did(vport->phba, cmdiocb);
9229
9230         /* FARP-RSP received from DID <did> */
9231         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
9232                          "0600 FARP-RSP received from DID x%x\n", did);
9233         /* ACCEPT the Farp resp request */
9234         lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
9235
9236         return 0;
9237 }
9238
9239 /**
9240  * lpfc_els_rcv_fan - Process an unsolicited fan iocb command
9241  * @vport: pointer to a host virtual N_Port data structure.
9242  * @cmdiocb: pointer to lpfc command iocb data structure.
9243  * @fan_ndlp: pointer to a node-list data structure.
9244  *
9245  * This routine processes a Fabric Address Notification (FAN) IOCB
9246  * command received as an ELS unsolicited event. The FAN ELS command will
9247  * only be processed on a physical port (i.e., the @vport represents the
9248  * physical port). The fabric NodeName and PortName from the FAN IOCB are
9249  * compared against those in the phba data structure. If any of those is
9250  * different, the lpfc_initial_flogi() routine is invoked to initialize
9251  * Fabric Login (FLOGI) to the fabric to start the discover over. Otherwise,
9252  * if both of those are identical, the lpfc_issue_fabric_reglogin() routine
9253  * is invoked to register login to the fabric.
9254  *
9255  * Return code
9256  *   0 - Successfully processed fan iocb (currently always return 0).
9257  **/
9258 static int
9259 lpfc_els_rcv_fan(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
9260                  struct lpfc_nodelist *fan_ndlp)
9261 {
9262         struct lpfc_hba *phba = vport->phba;
9263         uint32_t *lp;
9264         FAN *fp;
9265
9266         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS, "0265 FAN received\n");
9267         lp = (uint32_t *)cmdiocb->cmd_dmabuf->virt;
9268         fp = (FAN *) ++lp;
9269         /* FAN received; Fan does not have a reply sequence */
9270         if ((vport == phba->pport) &&
9271             (vport->port_state == LPFC_LOCAL_CFG_LINK)) {
9272                 if ((memcmp(&phba->fc_fabparam.nodeName, &fp->FnodeName,
9273                             sizeof(struct lpfc_name))) ||
9274                     (memcmp(&phba->fc_fabparam.portName, &fp->FportName,
9275                             sizeof(struct lpfc_name)))) {
9276                         /* This port has switched fabrics. FLOGI is required */
9277                         lpfc_issue_init_vfi(vport);
9278                 } else {
9279                         /* FAN verified - skip FLOGI */
9280                         vport->fc_myDID = vport->fc_prevDID;
9281                         if (phba->sli_rev < LPFC_SLI_REV4)
9282                                 lpfc_issue_fabric_reglogin(vport);
9283                         else {
9284                                 lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
9285                                         "3138 Need register VFI: (x%x/%x)\n",
9286                                         vport->fc_prevDID, vport->fc_myDID);
9287                                 lpfc_issue_reg_vfi(vport);
9288                         }
9289                 }
9290         }
9291         return 0;
9292 }
9293
9294 /**
9295  * lpfc_els_rcv_edc - Process an unsolicited EDC iocb
9296  * @vport: pointer to a host virtual N_Port data structure.
9297  * @cmdiocb: pointer to lpfc command iocb data structure.
9298  * @ndlp: pointer to a node-list data structure.
9299  *
9300  * Return code
9301  *   0 - Successfully processed echo iocb (currently always return 0)
9302  **/
9303 static int
9304 lpfc_els_rcv_edc(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
9305                  struct lpfc_nodelist *ndlp)
9306 {
9307         struct lpfc_hba  *phba = vport->phba;
9308         struct fc_els_edc *edc_req;
9309         struct fc_tlv_desc *tlv;
9310         uint8_t *payload;
9311         uint32_t *ptr, dtag;
9312         const char *dtag_nm;
9313         int desc_cnt = 0, bytes_remain;
9314         struct fc_diag_lnkflt_desc *plnkflt;
9315
9316         payload = cmdiocb->cmd_dmabuf->virt;
9317
9318         edc_req = (struct fc_els_edc *)payload;
9319         bytes_remain = be32_to_cpu(edc_req->desc_len);
9320
9321         ptr = (uint32_t *)payload;
9322         lpfc_printf_vlog(vport, KERN_INFO,
9323                          LOG_ELS | LOG_CGN_MGMT | LOG_LDS_EVENT,
9324                          "3319 Rcv EDC payload len %d: x%x x%x x%x\n",
9325                          bytes_remain, be32_to_cpu(*ptr),
9326                          be32_to_cpu(*(ptr + 1)), be32_to_cpu(*(ptr + 2)));
9327
9328         /* No signal support unless there is a congestion descriptor */
9329         phba->cgn_reg_signal = EDC_CG_SIG_NOTSUPPORTED;
9330         phba->cgn_sig_freq = 0;
9331         phba->cgn_reg_fpin = LPFC_CGN_FPIN_ALARM | LPFC_CGN_FPIN_WARN;
9332
9333         if (bytes_remain <= 0)
9334                 goto out;
9335
9336         tlv = edc_req->desc;
9337
9338         /*
9339          * cycle through EDC diagnostic descriptors to find the
9340          * congestion signaling capability descriptor
9341          */
9342         while (bytes_remain) {
9343                 if (bytes_remain < FC_TLV_DESC_HDR_SZ) {
9344                         lpfc_printf_log(phba, KERN_WARNING,
9345                                         LOG_ELS | LOG_CGN_MGMT | LOG_LDS_EVENT,
9346                                         "6464 Truncated TLV hdr on "
9347                                         "Diagnostic descriptor[%d]\n",
9348                                         desc_cnt);
9349                         goto out;
9350                 }
9351
9352                 dtag = be32_to_cpu(tlv->desc_tag);
9353                 switch (dtag) {
9354                 case ELS_DTAG_LNK_FAULT_CAP:
9355                         if (bytes_remain < FC_TLV_DESC_SZ_FROM_LENGTH(tlv) ||
9356                             FC_TLV_DESC_SZ_FROM_LENGTH(tlv) !=
9357                                 sizeof(struct fc_diag_lnkflt_desc)) {
9358                                 lpfc_printf_log(phba, KERN_WARNING,
9359                                         LOG_ELS | LOG_CGN_MGMT | LOG_LDS_EVENT,
9360                                         "6465 Truncated Link Fault Diagnostic "
9361                                         "descriptor[%d]: %d vs 0x%zx 0x%zx\n",
9362                                         desc_cnt, bytes_remain,
9363                                         FC_TLV_DESC_SZ_FROM_LENGTH(tlv),
9364                                         sizeof(struct fc_diag_lnkflt_desc));
9365                                 goto out;
9366                         }
9367                         plnkflt = (struct fc_diag_lnkflt_desc *)tlv;
9368                         lpfc_printf_log(phba, KERN_INFO,
9369                                 LOG_ELS | LOG_LDS_EVENT,
9370                                 "4626 Link Fault Desc Data: x%08x len x%x "
9371                                 "da x%x dd x%x interval x%x\n",
9372                                 be32_to_cpu(plnkflt->desc_tag),
9373                                 be32_to_cpu(plnkflt->desc_len),
9374                                 be32_to_cpu(
9375                                         plnkflt->degrade_activate_threshold),
9376                                 be32_to_cpu(
9377                                         plnkflt->degrade_deactivate_threshold),
9378                                 be32_to_cpu(plnkflt->fec_degrade_interval));
9379                         break;
9380                 case ELS_DTAG_CG_SIGNAL_CAP:
9381                         if (bytes_remain < FC_TLV_DESC_SZ_FROM_LENGTH(tlv) ||
9382                             FC_TLV_DESC_SZ_FROM_LENGTH(tlv) !=
9383                                 sizeof(struct fc_diag_cg_sig_desc)) {
9384                                 lpfc_printf_log(
9385                                         phba, KERN_WARNING, LOG_CGN_MGMT,
9386                                         "6466 Truncated cgn signal Diagnostic "
9387                                         "descriptor[%d]: %d vs 0x%zx 0x%zx\n",
9388                                         desc_cnt, bytes_remain,
9389                                         FC_TLV_DESC_SZ_FROM_LENGTH(tlv),
9390                                         sizeof(struct fc_diag_cg_sig_desc));
9391                                 goto out;
9392                         }
9393
9394                         phba->cgn_reg_fpin = phba->cgn_init_reg_fpin;
9395                         phba->cgn_reg_signal = phba->cgn_init_reg_signal;
9396
9397                         /* We start negotiation with lpfc_fabric_cgn_frequency.
9398                          * When we process the EDC, we will settle on the
9399                          * higher frequency.
9400                          */
9401                         phba->cgn_sig_freq = lpfc_fabric_cgn_frequency;
9402
9403                         lpfc_least_capable_settings(
9404                                 phba, (struct fc_diag_cg_sig_desc *)tlv);
9405                         break;
9406                 default:
9407                         dtag_nm = lpfc_get_tlv_dtag_nm(dtag);
9408                         lpfc_printf_log(phba, KERN_WARNING,
9409                                         LOG_ELS | LOG_CGN_MGMT | LOG_LDS_EVENT,
9410                                         "6467 unknown Diagnostic "
9411                                         "Descriptor[%d]: tag x%x (%s)\n",
9412                                         desc_cnt, dtag, dtag_nm);
9413                 }
9414                 bytes_remain -= FC_TLV_DESC_SZ_FROM_LENGTH(tlv);
9415                 tlv = fc_tlv_next_desc(tlv);
9416                 desc_cnt++;
9417         }
9418 out:
9419         /* Need to send back an ACC */
9420         lpfc_issue_els_edc_rsp(vport, cmdiocb, ndlp);
9421
9422         lpfc_config_cgn_signal(phba);
9423         return 0;
9424 }
9425
9426 /**
9427  * lpfc_els_timeout - Handler funciton to the els timer
9428  * @t: timer context used to obtain the vport.
9429  *
9430  * This routine is invoked by the ELS timer after timeout. It posts the ELS
9431  * timer timeout event by setting the WORKER_ELS_TMO bit to the work port
9432  * event bitmap and then invokes the lpfc_worker_wake_up() routine to wake
9433  * up the worker thread. It is for the worker thread to invoke the routine
9434  * lpfc_els_timeout_handler() to work on the posted event WORKER_ELS_TMO.
9435  **/
9436 void
9437 lpfc_els_timeout(struct timer_list *t)
9438 {
9439         struct lpfc_vport *vport = from_timer(vport, t, els_tmofunc);
9440         struct lpfc_hba   *phba = vport->phba;
9441         uint32_t tmo_posted;
9442         unsigned long iflag;
9443
9444         spin_lock_irqsave(&vport->work_port_lock, iflag);
9445         tmo_posted = vport->work_port_events & WORKER_ELS_TMO;
9446         if ((!tmo_posted) && (!(vport->load_flag & FC_UNLOADING)))
9447                 vport->work_port_events |= WORKER_ELS_TMO;
9448         spin_unlock_irqrestore(&vport->work_port_lock, iflag);
9449
9450         if ((!tmo_posted) && (!(vport->load_flag & FC_UNLOADING)))
9451                 lpfc_worker_wake_up(phba);
9452         return;
9453 }
9454
9455
9456 /**
9457  * lpfc_els_timeout_handler - Process an els timeout event
9458  * @vport: pointer to a virtual N_Port data structure.
9459  *
9460  * This routine is the actual handler function that processes an ELS timeout
9461  * event. It walks the ELS ring to get and abort all the IOCBs (except the
9462  * ABORT/CLOSE/FARP/FARPR/FDISC), which are associated with the @vport by
9463  * invoking the lpfc_sli_issue_abort_iotag() routine.
9464  **/
9465 void
9466 lpfc_els_timeout_handler(struct lpfc_vport *vport)
9467 {
9468         struct lpfc_hba  *phba = vport->phba;
9469         struct lpfc_sli_ring *pring;
9470         struct lpfc_iocbq *tmp_iocb, *piocb;
9471         IOCB_t *cmd = NULL;
9472         struct lpfc_dmabuf *pcmd;
9473         uint32_t els_command = 0;
9474         uint32_t timeout;
9475         uint32_t remote_ID = 0xffffffff;
9476         LIST_HEAD(abort_list);
9477         u32 ulp_command = 0, ulp_context = 0, did = 0, iotag = 0;
9478
9479
9480         timeout = (uint32_t)(phba->fc_ratov << 1);
9481
9482         pring = lpfc_phba_elsring(phba);
9483         if (unlikely(!pring))
9484                 return;
9485
9486         if (phba->pport->load_flag & FC_UNLOADING)
9487                 return;
9488
9489         spin_lock_irq(&phba->hbalock);
9490         if (phba->sli_rev == LPFC_SLI_REV4)
9491                 spin_lock(&pring->ring_lock);
9492
9493         list_for_each_entry_safe(piocb, tmp_iocb, &pring->txcmplq, list) {
9494                 ulp_command = get_job_cmnd(phba, piocb);
9495                 ulp_context = get_job_ulpcontext(phba, piocb);
9496                 did = get_job_els_rsp64_did(phba, piocb);
9497
9498                 if (phba->sli_rev == LPFC_SLI_REV4) {
9499                         iotag = get_wqe_reqtag(piocb);
9500                 } else {
9501                         cmd = &piocb->iocb;
9502                         iotag = cmd->ulpIoTag;
9503                 }
9504
9505                 if ((piocb->cmd_flag & LPFC_IO_LIBDFC) != 0 ||
9506                     ulp_command == CMD_ABORT_XRI_CX ||
9507                     ulp_command == CMD_ABORT_XRI_CN ||
9508                     ulp_command == CMD_CLOSE_XRI_CN)
9509                         continue;
9510
9511                 if (piocb->vport != vport)
9512                         continue;
9513
9514                 pcmd = piocb->cmd_dmabuf;
9515                 if (pcmd)
9516                         els_command = *(uint32_t *) (pcmd->virt);
9517
9518                 if (els_command == ELS_CMD_FARP ||
9519                     els_command == ELS_CMD_FARPR ||
9520                     els_command == ELS_CMD_FDISC)
9521                         continue;
9522
9523                 if (piocb->drvrTimeout > 0) {
9524                         if (piocb->drvrTimeout >= timeout)
9525                                 piocb->drvrTimeout -= timeout;
9526                         else
9527                                 piocb->drvrTimeout = 0;
9528                         continue;
9529                 }
9530
9531                 remote_ID = 0xffffffff;
9532                 if (ulp_command != CMD_GEN_REQUEST64_CR) {
9533                         remote_ID = did;
9534                 } else {
9535                         struct lpfc_nodelist *ndlp;
9536                         ndlp = __lpfc_findnode_rpi(vport, ulp_context);
9537                         if (ndlp)
9538                                 remote_ID = ndlp->nlp_DID;
9539                 }
9540                 list_add_tail(&piocb->dlist, &abort_list);
9541         }
9542         if (phba->sli_rev == LPFC_SLI_REV4)
9543                 spin_unlock(&pring->ring_lock);
9544         spin_unlock_irq(&phba->hbalock);
9545
9546         list_for_each_entry_safe(piocb, tmp_iocb, &abort_list, dlist) {
9547                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
9548                          "0127 ELS timeout Data: x%x x%x x%x "
9549                          "x%x\n", els_command,
9550                          remote_ID, ulp_command, iotag);
9551
9552                 spin_lock_irq(&phba->hbalock);
9553                 list_del_init(&piocb->dlist);
9554                 lpfc_sli_issue_abort_iotag(phba, pring, piocb, NULL);
9555                 spin_unlock_irq(&phba->hbalock);
9556         }
9557
9558         /* Make sure HBA is alive */
9559         lpfc_issue_hb_tmo(phba);
9560
9561         if (!list_empty(&pring->txcmplq))
9562                 if (!(phba->pport->load_flag & FC_UNLOADING))
9563                         mod_timer(&vport->els_tmofunc,
9564                                   jiffies + msecs_to_jiffies(1000 * timeout));
9565 }
9566
9567 /**
9568  * lpfc_els_flush_cmd - Clean up the outstanding els commands to a vport
9569  * @vport: pointer to a host virtual N_Port data structure.
9570  *
9571  * This routine is used to clean up all the outstanding ELS commands on a
9572  * @vport. It first aborts the @vport by invoking lpfc_fabric_abort_vport()
9573  * routine. After that, it walks the ELS transmit queue to remove all the
9574  * IOCBs with the @vport other than the QUE_RING and ABORT/CLOSE IOCBs. For
9575  * the IOCBs with a non-NULL completion callback function, the callback
9576  * function will be invoked with the status set to IOSTAT_LOCAL_REJECT and
9577  * un.ulpWord[4] set to IOERR_SLI_ABORTED. For IOCBs with a NULL completion
9578  * callback function, the IOCB will simply be released. Finally, it walks
9579  * the ELS transmit completion queue to issue an abort IOCB to any transmit
9580  * completion queue IOCB that is associated with the @vport and is not
9581  * an IOCB from libdfc (i.e., the management plane IOCBs that are not
9582  * part of the discovery state machine) out to HBA by invoking the
9583  * lpfc_sli_issue_abort_iotag() routine. Note that this function issues the
9584  * abort IOCB to any transmit completion queueed IOCB, it does not guarantee
9585  * the IOCBs are aborted when this function returns.
9586  **/
9587 void
9588 lpfc_els_flush_cmd(struct lpfc_vport *vport)
9589 {
9590         LIST_HEAD(abort_list);
9591         struct lpfc_hba  *phba = vport->phba;
9592         struct lpfc_sli_ring *pring;
9593         struct lpfc_iocbq *tmp_iocb, *piocb;
9594         u32 ulp_command;
9595         unsigned long iflags = 0;
9596
9597         lpfc_fabric_abort_vport(vport);
9598
9599         /*
9600          * For SLI3, only the hbalock is required.  But SLI4 needs to coordinate
9601          * with the ring insert operation.  Because lpfc_sli_issue_abort_iotag
9602          * ultimately grabs the ring_lock, the driver must splice the list into
9603          * a working list and release the locks before calling the abort.
9604          */
9605         spin_lock_irqsave(&phba->hbalock, iflags);
9606         pring = lpfc_phba_elsring(phba);
9607
9608         /* Bail out if we've no ELS wq, like in PCI error recovery case. */
9609         if (unlikely(!pring)) {
9610                 spin_unlock_irqrestore(&phba->hbalock, iflags);
9611                 return;
9612         }
9613
9614         if (phba->sli_rev == LPFC_SLI_REV4)
9615                 spin_lock(&pring->ring_lock);
9616
9617         /* First we need to issue aborts to outstanding cmds on txcmpl */
9618         list_for_each_entry_safe(piocb, tmp_iocb, &pring->txcmplq, list) {
9619                 if (piocb->cmd_flag & LPFC_IO_LIBDFC)
9620                         continue;
9621
9622                 if (piocb->vport != vport)
9623                         continue;
9624
9625                 if (piocb->cmd_flag & LPFC_DRIVER_ABORTED)
9626                         continue;
9627
9628                 /* On the ELS ring we can have ELS_REQUESTs or
9629                  * GEN_REQUESTs waiting for a response.
9630                  */
9631                 ulp_command = get_job_cmnd(phba, piocb);
9632                 if (ulp_command == CMD_ELS_REQUEST64_CR) {
9633                         list_add_tail(&piocb->dlist, &abort_list);
9634
9635                         /* If the link is down when flushing ELS commands
9636                          * the firmware will not complete them till after
9637                          * the link comes back up. This may confuse
9638                          * discovery for the new link up, so we need to
9639                          * change the compl routine to just clean up the iocb
9640                          * and avoid any retry logic.
9641                          */
9642                         if (phba->link_state == LPFC_LINK_DOWN)
9643                                 piocb->cmd_cmpl = lpfc_cmpl_els_link_down;
9644                 }
9645                 if (ulp_command == CMD_GEN_REQUEST64_CR)
9646                         list_add_tail(&piocb->dlist, &abort_list);
9647         }
9648
9649         if (phba->sli_rev == LPFC_SLI_REV4)
9650                 spin_unlock(&pring->ring_lock);
9651         spin_unlock_irqrestore(&phba->hbalock, iflags);
9652
9653         /* Abort each txcmpl iocb on aborted list and remove the dlist links. */
9654         list_for_each_entry_safe(piocb, tmp_iocb, &abort_list, dlist) {
9655                 spin_lock_irqsave(&phba->hbalock, iflags);
9656                 list_del_init(&piocb->dlist);
9657                 lpfc_sli_issue_abort_iotag(phba, pring, piocb, NULL);
9658                 spin_unlock_irqrestore(&phba->hbalock, iflags);
9659         }
9660         /* Make sure HBA is alive */
9661         lpfc_issue_hb_tmo(phba);
9662
9663         if (!list_empty(&abort_list))
9664                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
9665                                  "3387 abort list for txq not empty\n");
9666         INIT_LIST_HEAD(&abort_list);
9667
9668         spin_lock_irqsave(&phba->hbalock, iflags);
9669         if (phba->sli_rev == LPFC_SLI_REV4)
9670                 spin_lock(&pring->ring_lock);
9671
9672         /* No need to abort the txq list,
9673          * just queue them up for lpfc_sli_cancel_iocbs
9674          */
9675         list_for_each_entry_safe(piocb, tmp_iocb, &pring->txq, list) {
9676                 ulp_command = get_job_cmnd(phba, piocb);
9677
9678                 if (piocb->cmd_flag & LPFC_IO_LIBDFC)
9679                         continue;
9680
9681                 /* Do not flush out the QUE_RING and ABORT/CLOSE iocbs */
9682                 if (ulp_command == CMD_QUE_RING_BUF_CN ||
9683                     ulp_command == CMD_QUE_RING_BUF64_CN ||
9684                     ulp_command == CMD_CLOSE_XRI_CN ||
9685                     ulp_command == CMD_ABORT_XRI_CN ||
9686                     ulp_command == CMD_ABORT_XRI_CX)
9687                         continue;
9688
9689                 if (piocb->vport != vport)
9690                         continue;
9691
9692                 list_del_init(&piocb->list);
9693                 list_add_tail(&piocb->list, &abort_list);
9694         }
9695
9696         /* The same holds true for any FLOGI/FDISC on the fabric_iocb_list */
9697         if (vport == phba->pport) {
9698                 list_for_each_entry_safe(piocb, tmp_iocb,
9699                                          &phba->fabric_iocb_list, list) {
9700                         list_del_init(&piocb->list);
9701                         list_add_tail(&piocb->list, &abort_list);
9702                 }
9703         }
9704
9705         if (phba->sli_rev == LPFC_SLI_REV4)
9706                 spin_unlock(&pring->ring_lock);
9707         spin_unlock_irqrestore(&phba->hbalock, iflags);
9708
9709         /* Cancel all the IOCBs from the completions list */
9710         lpfc_sli_cancel_iocbs(phba, &abort_list,
9711                               IOSTAT_LOCAL_REJECT, IOERR_SLI_ABORTED);
9712
9713         return;
9714 }
9715
9716 /**
9717  * lpfc_els_flush_all_cmd - Clean up all the outstanding els commands to a HBA
9718  * @phba: pointer to lpfc hba data structure.
9719  *
9720  * This routine is used to clean up all the outstanding ELS commands on a
9721  * @phba. It first aborts the @phba by invoking the lpfc_fabric_abort_hba()
9722  * routine. After that, it walks the ELS transmit queue to remove all the
9723  * IOCBs to the @phba other than the QUE_RING and ABORT/CLOSE IOCBs. For
9724  * the IOCBs with the completion callback function associated, the callback
9725  * function will be invoked with the status set to IOSTAT_LOCAL_REJECT and
9726  * un.ulpWord[4] set to IOERR_SLI_ABORTED. For IOCBs without the completion
9727  * callback function associated, the IOCB will simply be released. Finally,
9728  * it walks the ELS transmit completion queue to issue an abort IOCB to any
9729  * transmit completion queue IOCB that is not an IOCB from libdfc (i.e., the
9730  * management plane IOCBs that are not part of the discovery state machine)
9731  * out to HBA by invoking the lpfc_sli_issue_abort_iotag() routine.
9732  **/
9733 void
9734 lpfc_els_flush_all_cmd(struct lpfc_hba  *phba)
9735 {
9736         struct lpfc_vport *vport;
9737
9738         spin_lock_irq(&phba->port_list_lock);
9739         list_for_each_entry(vport, &phba->port_list, listentry)
9740                 lpfc_els_flush_cmd(vport);
9741         spin_unlock_irq(&phba->port_list_lock);
9742
9743         return;
9744 }
9745
9746 /**
9747  * lpfc_send_els_failure_event - Posts an ELS command failure event
9748  * @phba: Pointer to hba context object.
9749  * @cmdiocbp: Pointer to command iocb which reported error.
9750  * @rspiocbp: Pointer to response iocb which reported error.
9751  *
9752  * This function sends an event when there is an ELS command
9753  * failure.
9754  **/
9755 void
9756 lpfc_send_els_failure_event(struct lpfc_hba *phba,
9757                         struct lpfc_iocbq *cmdiocbp,
9758                         struct lpfc_iocbq *rspiocbp)
9759 {
9760         struct lpfc_vport *vport = cmdiocbp->vport;
9761         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
9762         struct lpfc_lsrjt_event lsrjt_event;
9763         struct lpfc_fabric_event_header fabric_event;
9764         struct ls_rjt stat;
9765         struct lpfc_nodelist *ndlp;
9766         uint32_t *pcmd;
9767         u32 ulp_status, ulp_word4;
9768
9769         ndlp = cmdiocbp->ndlp;
9770         if (!ndlp)
9771                 return;
9772
9773         ulp_status = get_job_ulpstatus(phba, rspiocbp);
9774         ulp_word4 = get_job_word4(phba, rspiocbp);
9775
9776         if (ulp_status == IOSTAT_LS_RJT) {
9777                 lsrjt_event.header.event_type = FC_REG_ELS_EVENT;
9778                 lsrjt_event.header.subcategory = LPFC_EVENT_LSRJT_RCV;
9779                 memcpy(lsrjt_event.header.wwpn, &ndlp->nlp_portname,
9780                         sizeof(struct lpfc_name));
9781                 memcpy(lsrjt_event.header.wwnn, &ndlp->nlp_nodename,
9782                         sizeof(struct lpfc_name));
9783                 pcmd = (uint32_t *)cmdiocbp->cmd_dmabuf->virt;
9784                 lsrjt_event.command = (pcmd != NULL) ? *pcmd : 0;
9785                 stat.un.ls_rjt_error_be = cpu_to_be32(ulp_word4);
9786                 lsrjt_event.reason_code = stat.un.b.lsRjtRsnCode;
9787                 lsrjt_event.explanation = stat.un.b.lsRjtRsnCodeExp;
9788                 fc_host_post_vendor_event(shost,
9789                         fc_get_event_number(),
9790                         sizeof(lsrjt_event),
9791                         (char *)&lsrjt_event,
9792                         LPFC_NL_VENDOR_ID);
9793                 return;
9794         }
9795         if (ulp_status == IOSTAT_NPORT_BSY ||
9796             ulp_status == IOSTAT_FABRIC_BSY) {
9797                 fabric_event.event_type = FC_REG_FABRIC_EVENT;
9798                 if (ulp_status == IOSTAT_NPORT_BSY)
9799                         fabric_event.subcategory = LPFC_EVENT_PORT_BUSY;
9800                 else
9801                         fabric_event.subcategory = LPFC_EVENT_FABRIC_BUSY;
9802                 memcpy(fabric_event.wwpn, &ndlp->nlp_portname,
9803                         sizeof(struct lpfc_name));
9804                 memcpy(fabric_event.wwnn, &ndlp->nlp_nodename,
9805                         sizeof(struct lpfc_name));
9806                 fc_host_post_vendor_event(shost,
9807                         fc_get_event_number(),
9808                         sizeof(fabric_event),
9809                         (char *)&fabric_event,
9810                         LPFC_NL_VENDOR_ID);
9811                 return;
9812         }
9813
9814 }
9815
9816 /**
9817  * lpfc_send_els_event - Posts unsolicited els event
9818  * @vport: Pointer to vport object.
9819  * @ndlp: Pointer FC node object.
9820  * @payload: ELS command code type.
9821  *
9822  * This function posts an event when there is an incoming
9823  * unsolicited ELS command.
9824  **/
9825 static void
9826 lpfc_send_els_event(struct lpfc_vport *vport,
9827                     struct lpfc_nodelist *ndlp,
9828                     uint32_t *payload)
9829 {
9830         struct lpfc_els_event_header *els_data = NULL;
9831         struct lpfc_logo_event *logo_data = NULL;
9832         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
9833
9834         if (*payload == ELS_CMD_LOGO) {
9835                 logo_data = kmalloc(sizeof(struct lpfc_logo_event), GFP_KERNEL);
9836                 if (!logo_data) {
9837                         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
9838                                 "0148 Failed to allocate memory "
9839                                 "for LOGO event\n");
9840                         return;
9841                 }
9842                 els_data = &logo_data->header;
9843         } else {
9844                 els_data = kmalloc(sizeof(struct lpfc_els_event_header),
9845                         GFP_KERNEL);
9846                 if (!els_data) {
9847                         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
9848                                 "0149 Failed to allocate memory "
9849                                 "for ELS event\n");
9850                         return;
9851                 }
9852         }
9853         els_data->event_type = FC_REG_ELS_EVENT;
9854         switch (*payload) {
9855         case ELS_CMD_PLOGI:
9856                 els_data->subcategory = LPFC_EVENT_PLOGI_RCV;
9857                 break;
9858         case ELS_CMD_PRLO:
9859                 els_data->subcategory = LPFC_EVENT_PRLO_RCV;
9860                 break;
9861         case ELS_CMD_ADISC:
9862                 els_data->subcategory = LPFC_EVENT_ADISC_RCV;
9863                 break;
9864         case ELS_CMD_LOGO:
9865                 els_data->subcategory = LPFC_EVENT_LOGO_RCV;
9866                 /* Copy the WWPN in the LOGO payload */
9867                 memcpy(logo_data->logo_wwpn, &payload[2],
9868                         sizeof(struct lpfc_name));
9869                 break;
9870         default:
9871                 kfree(els_data);
9872                 return;
9873         }
9874         memcpy(els_data->wwpn, &ndlp->nlp_portname, sizeof(struct lpfc_name));
9875         memcpy(els_data->wwnn, &ndlp->nlp_nodename, sizeof(struct lpfc_name));
9876         if (*payload == ELS_CMD_LOGO) {
9877                 fc_host_post_vendor_event(shost,
9878                         fc_get_event_number(),
9879                         sizeof(struct lpfc_logo_event),
9880                         (char *)logo_data,
9881                         LPFC_NL_VENDOR_ID);
9882                 kfree(logo_data);
9883         } else {
9884                 fc_host_post_vendor_event(shost,
9885                         fc_get_event_number(),
9886                         sizeof(struct lpfc_els_event_header),
9887                         (char *)els_data,
9888                         LPFC_NL_VENDOR_ID);
9889                 kfree(els_data);
9890         }
9891
9892         return;
9893 }
9894
9895
9896 DECLARE_ENUM2STR_LOOKUP(lpfc_get_fpin_li_event_nm, fc_fpin_li_event_types,
9897                         FC_FPIN_LI_EVT_TYPES_INIT);
9898
9899 DECLARE_ENUM2STR_LOOKUP(lpfc_get_fpin_deli_event_nm, fc_fpin_deli_event_types,
9900                         FC_FPIN_DELI_EVT_TYPES_INIT);
9901
9902 DECLARE_ENUM2STR_LOOKUP(lpfc_get_fpin_congn_event_nm, fc_fpin_congn_event_types,
9903                         FC_FPIN_CONGN_EVT_TYPES_INIT);
9904
9905 DECLARE_ENUM2STR_LOOKUP(lpfc_get_fpin_congn_severity_nm,
9906                         fc_fpin_congn_severity_types,
9907                         FC_FPIN_CONGN_SEVERITY_INIT);
9908
9909
9910 /**
9911  * lpfc_display_fpin_wwpn - Display WWPNs accessible by the attached port
9912  * @phba: Pointer to phba object.
9913  * @wwnlist: Pointer to list of WWPNs in FPIN payload
9914  * @cnt: count of WWPNs in FPIN payload
9915  *
9916  * This routine is called by LI and PC descriptors.
9917  * Limit the number of WWPNs displayed to 6 log messages, 6 per log message
9918  */
9919 static void
9920 lpfc_display_fpin_wwpn(struct lpfc_hba *phba, __be64 *wwnlist, u32 cnt)
9921 {
9922         char buf[LPFC_FPIN_WWPN_LINE_SZ];
9923         __be64 wwn;
9924         u64 wwpn;
9925         int i, len;
9926         int line = 0;
9927         int wcnt = 0;
9928         bool endit = false;
9929
9930         len = scnprintf(buf, LPFC_FPIN_WWPN_LINE_SZ, "Accessible WWPNs:");
9931         for (i = 0; i < cnt; i++) {
9932                 /* Are we on the last WWPN */
9933                 if (i == (cnt - 1))
9934                         endit = true;
9935
9936                 /* Extract the next WWPN from the payload */
9937                 wwn = *wwnlist++;
9938                 wwpn = be64_to_cpu(wwn);
9939                 len += scnprintf(buf + len, LPFC_FPIN_WWPN_LINE_SZ - len,
9940                                  " %016llx", wwpn);
9941
9942                 /* Log a message if we are on the last WWPN
9943                  * or if we hit the max allowed per message.
9944                  */
9945                 wcnt++;
9946                 if (wcnt == LPFC_FPIN_WWPN_LINE_CNT || endit) {
9947                         buf[len] = 0;
9948                         lpfc_printf_log(phba, KERN_INFO, LOG_ELS,
9949                                         "4686 %s\n", buf);
9950
9951                         /* Check if we reached the last WWPN */
9952                         if (endit)
9953                                 return;
9954
9955                         /* Limit the number of log message displayed per FPIN */
9956                         line++;
9957                         if (line == LPFC_FPIN_WWPN_NUM_LINE) {
9958                                 lpfc_printf_log(phba, KERN_INFO, LOG_ELS,
9959                                                 "4687 %d WWPNs Truncated\n",
9960                                                 cnt - i - 1);
9961                                 return;
9962                         }
9963
9964                         /* Start over with next log message */
9965                         wcnt = 0;
9966                         len = scnprintf(buf, LPFC_FPIN_WWPN_LINE_SZ,
9967                                         "Additional WWPNs:");
9968                 }
9969         }
9970 }
9971
9972 /**
9973  * lpfc_els_rcv_fpin_li - Process an FPIN Link Integrity Event.
9974  * @phba: Pointer to phba object.
9975  * @tlv:  Pointer to the Link Integrity Notification Descriptor.
9976  *
9977  * This function processes a Link Integrity FPIN event by logging a message.
9978  **/
9979 static void
9980 lpfc_els_rcv_fpin_li(struct lpfc_hba *phba, struct fc_tlv_desc *tlv)
9981 {
9982         struct fc_fn_li_desc *li = (struct fc_fn_li_desc *)tlv;
9983         const char *li_evt_str;
9984         u32 li_evt, cnt;
9985
9986         li_evt = be16_to_cpu(li->event_type);
9987         li_evt_str = lpfc_get_fpin_li_event_nm(li_evt);
9988         cnt = be32_to_cpu(li->pname_count);
9989
9990         lpfc_printf_log(phba, KERN_INFO, LOG_ELS,
9991                         "4680 FPIN Link Integrity %s (x%x) "
9992                         "Detecting PN x%016llx Attached PN x%016llx "
9993                         "Duration %d mSecs Count %d Port Cnt %d\n",
9994                         li_evt_str, li_evt,
9995                         be64_to_cpu(li->detecting_wwpn),
9996                         be64_to_cpu(li->attached_wwpn),
9997                         be32_to_cpu(li->event_threshold),
9998                         be32_to_cpu(li->event_count), cnt);
9999
10000         lpfc_display_fpin_wwpn(phba, (__be64 *)&li->pname_list, cnt);
10001 }
10002
10003 /**
10004  * lpfc_els_rcv_fpin_del - Process an FPIN Delivery Event.
10005  * @phba: Pointer to hba object.
10006  * @tlv:  Pointer to the Delivery Notification Descriptor TLV
10007  *
10008  * This function processes a Delivery FPIN event by logging a message.
10009  **/
10010 static void
10011 lpfc_els_rcv_fpin_del(struct lpfc_hba *phba, struct fc_tlv_desc *tlv)
10012 {
10013         struct fc_fn_deli_desc *del = (struct fc_fn_deli_desc *)tlv;
10014         const char *del_rsn_str;
10015         u32 del_rsn;
10016         __be32 *frame;
10017
10018         del_rsn = be16_to_cpu(del->deli_reason_code);
10019         del_rsn_str = lpfc_get_fpin_deli_event_nm(del_rsn);
10020
10021         /* Skip over desc_tag/desc_len header to payload */
10022         frame = (__be32 *)(del + 1);
10023
10024         lpfc_printf_log(phba, KERN_INFO, LOG_ELS,
10025                         "4681 FPIN Delivery %s (x%x) "
10026                         "Detecting PN x%016llx Attached PN x%016llx "
10027                         "DiscHdr0  x%08x "
10028                         "DiscHdr1 x%08x DiscHdr2 x%08x DiscHdr3 x%08x "
10029                         "DiscHdr4 x%08x DiscHdr5 x%08x\n",
10030                         del_rsn_str, del_rsn,
10031                         be64_to_cpu(del->detecting_wwpn),
10032                         be64_to_cpu(del->attached_wwpn),
10033                         be32_to_cpu(frame[0]),
10034                         be32_to_cpu(frame[1]),
10035                         be32_to_cpu(frame[2]),
10036                         be32_to_cpu(frame[3]),
10037                         be32_to_cpu(frame[4]),
10038                         be32_to_cpu(frame[5]));
10039 }
10040
10041 /**
10042  * lpfc_els_rcv_fpin_peer_cgn - Process a FPIN Peer Congestion Event.
10043  * @phba: Pointer to hba object.
10044  * @tlv:  Pointer to the Peer Congestion Notification Descriptor TLV
10045  *
10046  * This function processes a Peer Congestion FPIN event by logging a message.
10047  **/
10048 static void
10049 lpfc_els_rcv_fpin_peer_cgn(struct lpfc_hba *phba, struct fc_tlv_desc *tlv)
10050 {
10051         struct fc_fn_peer_congn_desc *pc = (struct fc_fn_peer_congn_desc *)tlv;
10052         const char *pc_evt_str;
10053         u32 pc_evt, cnt;
10054
10055         pc_evt = be16_to_cpu(pc->event_type);
10056         pc_evt_str = lpfc_get_fpin_congn_event_nm(pc_evt);
10057         cnt = be32_to_cpu(pc->pname_count);
10058
10059         lpfc_printf_log(phba, KERN_INFO, LOG_CGN_MGMT | LOG_ELS,
10060                         "4684 FPIN Peer Congestion %s (x%x) "
10061                         "Duration %d mSecs "
10062                         "Detecting PN x%016llx Attached PN x%016llx "
10063                         "Impacted Port Cnt %d\n",
10064                         pc_evt_str, pc_evt,
10065                         be32_to_cpu(pc->event_period),
10066                         be64_to_cpu(pc->detecting_wwpn),
10067                         be64_to_cpu(pc->attached_wwpn),
10068                         cnt);
10069
10070         lpfc_display_fpin_wwpn(phba, (__be64 *)&pc->pname_list, cnt);
10071 }
10072
10073 /**
10074  * lpfc_els_rcv_fpin_cgn - Process an FPIN Congestion notification
10075  * @phba: Pointer to hba object.
10076  * @tlv:  Pointer to the Congestion Notification Descriptor TLV
10077  *
10078  * This function processes an FPIN Congestion Notifiction.  The notification
10079  * could be an Alarm or Warning.  This routine feeds that data into driver's
10080  * running congestion algorithm. It also processes the FPIN by
10081  * logging a message. It returns 1 to indicate deliver this message
10082  * to the upper layer or 0 to indicate don't deliver it.
10083  **/
10084 static int
10085 lpfc_els_rcv_fpin_cgn(struct lpfc_hba *phba, struct fc_tlv_desc *tlv)
10086 {
10087         struct lpfc_cgn_info *cp;
10088         struct fc_fn_congn_desc *cgn = (struct fc_fn_congn_desc *)tlv;
10089         const char *cgn_evt_str;
10090         u32 cgn_evt;
10091         const char *cgn_sev_str;
10092         u32 cgn_sev;
10093         uint16_t value;
10094         u32 crc;
10095         bool nm_log = false;
10096         int rc = 1;
10097
10098         cgn_evt = be16_to_cpu(cgn->event_type);
10099         cgn_evt_str = lpfc_get_fpin_congn_event_nm(cgn_evt);
10100         cgn_sev = cgn->severity;
10101         cgn_sev_str = lpfc_get_fpin_congn_severity_nm(cgn_sev);
10102
10103         /* The driver only takes action on a Credit Stall or Oversubscription
10104          * event type to engage the IO algorithm.  The driver prints an
10105          * unmaskable message only for Lost Credit and Credit Stall.
10106          * TODO: Still need to have definition of host action on clear,
10107          *       lost credit and device specific event types.
10108          */
10109         switch (cgn_evt) {
10110         case FPIN_CONGN_LOST_CREDIT:
10111                 nm_log = true;
10112                 break;
10113         case FPIN_CONGN_CREDIT_STALL:
10114                 nm_log = true;
10115                 fallthrough;
10116         case FPIN_CONGN_OVERSUBSCRIPTION:
10117                 if (cgn_evt == FPIN_CONGN_OVERSUBSCRIPTION)
10118                         nm_log = false;
10119                 switch (cgn_sev) {
10120                 case FPIN_CONGN_SEVERITY_ERROR:
10121                         /* Take action here for an Alarm event */
10122                         if (phba->cmf_active_mode != LPFC_CFG_OFF) {
10123                                 if (phba->cgn_reg_fpin & LPFC_CGN_FPIN_ALARM) {
10124                                         /* Track of alarm cnt for SYNC_WQE */
10125                                         atomic_inc(&phba->cgn_sync_alarm_cnt);
10126                                 }
10127                                 /* Track alarm cnt for cgn_info regardless
10128                                  * of whether CMF is configured for Signals
10129                                  * or FPINs.
10130                                  */
10131                                 atomic_inc(&phba->cgn_fabric_alarm_cnt);
10132                                 goto cleanup;
10133                         }
10134                         break;
10135                 case FPIN_CONGN_SEVERITY_WARNING:
10136                         /* Take action here for a Warning event */
10137                         if (phba->cmf_active_mode != LPFC_CFG_OFF) {
10138                                 if (phba->cgn_reg_fpin & LPFC_CGN_FPIN_WARN) {
10139                                         /* Track of warning cnt for SYNC_WQE */
10140                                         atomic_inc(&phba->cgn_sync_warn_cnt);
10141                                 }
10142                                 /* Track warning cnt and freq for cgn_info
10143                                  * regardless of whether CMF is configured for
10144                                  * Signals or FPINs.
10145                                  */
10146                                 atomic_inc(&phba->cgn_fabric_warn_cnt);
10147 cleanup:
10148                                 /* Save frequency in ms */
10149                                 phba->cgn_fpin_frequency =
10150                                         be32_to_cpu(cgn->event_period);
10151                                 value = phba->cgn_fpin_frequency;
10152                                 if (phba->cgn_i) {
10153                                         cp = (struct lpfc_cgn_info *)
10154                                                 phba->cgn_i->virt;
10155                                         cp->cgn_alarm_freq =
10156                                                 cpu_to_le16(value);
10157                                         cp->cgn_warn_freq =
10158                                                 cpu_to_le16(value);
10159                                         crc = lpfc_cgn_calc_crc32
10160                                                 (cp,
10161                                                 LPFC_CGN_INFO_SZ,
10162                                                 LPFC_CGN_CRC32_SEED);
10163                                         cp->cgn_info_crc = cpu_to_le32(crc);
10164                                 }
10165
10166                                 /* Don't deliver to upper layer since
10167                                  * driver took action on this tlv.
10168                                  */
10169                                 rc = 0;
10170                         }
10171                         break;
10172                 }
10173                 break;
10174         }
10175
10176         /* Change the log level to unmaskable for the following event types. */
10177         lpfc_printf_log(phba, (nm_log ? KERN_WARNING : KERN_INFO),
10178                         LOG_CGN_MGMT | LOG_ELS,
10179                         "4683 FPIN CONGESTION %s type %s (x%x) Event "
10180                         "Duration %d mSecs\n",
10181                         cgn_sev_str, cgn_evt_str, cgn_evt,
10182                         be32_to_cpu(cgn->event_period));
10183         return rc;
10184 }
10185
10186 void
10187 lpfc_els_rcv_fpin(struct lpfc_vport *vport, void *p, u32 fpin_length)
10188 {
10189         struct lpfc_hba *phba = vport->phba;
10190         struct fc_els_fpin *fpin = (struct fc_els_fpin *)p;
10191         struct fc_tlv_desc *tlv, *first_tlv, *current_tlv;
10192         const char *dtag_nm;
10193         int desc_cnt = 0, bytes_remain, cnt;
10194         u32 dtag, deliver = 0;
10195         int len;
10196
10197         /* FPINs handled only if we are in the right discovery state */
10198         if (vport->port_state < LPFC_DISC_AUTH)
10199                 return;
10200
10201         /* make sure there is the full fpin header */
10202         if (fpin_length < sizeof(struct fc_els_fpin))
10203                 return;
10204
10205         /* Sanity check descriptor length. The desc_len value does not
10206          * include space for the ELS command and the desc_len fields.
10207          */
10208         len = be32_to_cpu(fpin->desc_len);
10209         if (fpin_length < len + sizeof(struct fc_els_fpin)) {
10210                 lpfc_printf_log(phba, KERN_WARNING, LOG_CGN_MGMT,
10211                                 "4671 Bad ELS FPIN length %d: %d\n",
10212                                 len, fpin_length);
10213                 return;
10214         }
10215
10216         tlv = (struct fc_tlv_desc *)&fpin->fpin_desc[0];
10217         first_tlv = tlv;
10218         bytes_remain = fpin_length - offsetof(struct fc_els_fpin, fpin_desc);
10219         bytes_remain = min_t(u32, bytes_remain, be32_to_cpu(fpin->desc_len));
10220
10221         /* process each descriptor separately */
10222         while (bytes_remain >= FC_TLV_DESC_HDR_SZ &&
10223                bytes_remain >= FC_TLV_DESC_SZ_FROM_LENGTH(tlv)) {
10224                 dtag = be32_to_cpu(tlv->desc_tag);
10225                 switch (dtag) {
10226                 case ELS_DTAG_LNK_INTEGRITY:
10227                         lpfc_els_rcv_fpin_li(phba, tlv);
10228                         deliver = 1;
10229                         break;
10230                 case ELS_DTAG_DELIVERY:
10231                         lpfc_els_rcv_fpin_del(phba, tlv);
10232                         deliver = 1;
10233                         break;
10234                 case ELS_DTAG_PEER_CONGEST:
10235                         lpfc_els_rcv_fpin_peer_cgn(phba, tlv);
10236                         deliver = 1;
10237                         break;
10238                 case ELS_DTAG_CONGESTION:
10239                         deliver = lpfc_els_rcv_fpin_cgn(phba, tlv);
10240                         break;
10241                 default:
10242                         dtag_nm = lpfc_get_tlv_dtag_nm(dtag);
10243                         lpfc_printf_log(phba, KERN_WARNING, LOG_CGN_MGMT,
10244                                         "4678 unknown FPIN descriptor[%d]: "
10245                                         "tag x%x (%s)\n",
10246                                         desc_cnt, dtag, dtag_nm);
10247
10248                         /* If descriptor is bad, drop the rest of the data */
10249                         return;
10250                 }
10251                 lpfc_cgn_update_stat(phba, dtag);
10252                 cnt = be32_to_cpu(tlv->desc_len);
10253
10254                 /* Sanity check descriptor length. The desc_len value does not
10255                  * include space for the desc_tag and the desc_len fields.
10256                  */
10257                 len -= (cnt + sizeof(struct fc_tlv_desc));
10258                 if (len < 0) {
10259                         dtag_nm = lpfc_get_tlv_dtag_nm(dtag);
10260                         lpfc_printf_log(phba, KERN_WARNING, LOG_CGN_MGMT,
10261                                         "4672 Bad FPIN descriptor TLV length "
10262                                         "%d: %d %d %s\n",
10263                                         cnt, len, fpin_length, dtag_nm);
10264                         return;
10265                 }
10266
10267                 current_tlv = tlv;
10268                 bytes_remain -= FC_TLV_DESC_SZ_FROM_LENGTH(tlv);
10269                 tlv = fc_tlv_next_desc(tlv);
10270
10271                 /* Format payload such that the FPIN delivered to the
10272                  * upper layer is a single descriptor FPIN.
10273                  */
10274                 if (desc_cnt)
10275                         memcpy(first_tlv, current_tlv,
10276                                (cnt + sizeof(struct fc_els_fpin)));
10277
10278                 /* Adjust the length so that it only reflects a
10279                  * single descriptor FPIN.
10280                  */
10281                 fpin_length = cnt + sizeof(struct fc_els_fpin);
10282                 fpin->desc_len = cpu_to_be32(fpin_length);
10283                 fpin_length += sizeof(struct fc_els_fpin); /* the entire FPIN */
10284
10285                 /* Send every descriptor individually to the upper layer */
10286                 if (deliver)
10287                         fc_host_fpin_rcv(lpfc_shost_from_vport(vport),
10288                                          fpin_length, (char *)fpin, 0);
10289                 desc_cnt++;
10290         }
10291 }
10292
10293 /**
10294  * lpfc_els_unsol_buffer - Process an unsolicited event data buffer
10295  * @phba: pointer to lpfc hba data structure.
10296  * @pring: pointer to a SLI ring.
10297  * @vport: pointer to a host virtual N_Port data structure.
10298  * @elsiocb: pointer to lpfc els command iocb data structure.
10299  *
10300  * This routine is used for processing the IOCB associated with a unsolicited
10301  * event. It first determines whether there is an existing ndlp that matches
10302  * the DID from the unsolicited IOCB. If not, it will create a new one with
10303  * the DID from the unsolicited IOCB. The ELS command from the unsolicited
10304  * IOCB is then used to invoke the proper routine and to set up proper state
10305  * of the discovery state machine.
10306  **/
10307 static void
10308 lpfc_els_unsol_buffer(struct lpfc_hba *phba, struct lpfc_sli_ring *pring,
10309                       struct lpfc_vport *vport, struct lpfc_iocbq *elsiocb)
10310 {
10311         struct lpfc_nodelist *ndlp;
10312         struct ls_rjt stat;
10313         u32 *payload, payload_len;
10314         u32 cmd = 0, did = 0, newnode, status = 0;
10315         uint8_t rjt_exp, rjt_err = 0, init_link = 0;
10316         struct lpfc_wcqe_complete *wcqe_cmpl = NULL;
10317         LPFC_MBOXQ_t *mbox;
10318
10319         if (!vport || !elsiocb->cmd_dmabuf)
10320                 goto dropit;
10321
10322         newnode = 0;
10323         wcqe_cmpl = &elsiocb->wcqe_cmpl;
10324         payload = elsiocb->cmd_dmabuf->virt;
10325         if (phba->sli_rev == LPFC_SLI_REV4)
10326                 payload_len = wcqe_cmpl->total_data_placed;
10327         else
10328                 payload_len = elsiocb->iocb.unsli3.rcvsli3.acc_len;
10329         status = get_job_ulpstatus(phba, elsiocb);
10330         cmd = *payload;
10331         if ((phba->sli3_options & LPFC_SLI3_HBQ_ENABLED) == 0)
10332                 lpfc_sli3_post_buffer(phba, pring, 1);
10333
10334         did = get_job_els_rsp64_did(phba, elsiocb);
10335         if (status) {
10336                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10337                         "RCV Unsol ELS:  status:x%x/x%x did:x%x",
10338                         status, get_job_word4(phba, elsiocb), did);
10339                 goto dropit;
10340         }
10341
10342         /* Check to see if link went down during discovery */
10343         if (lpfc_els_chk_latt(vport))
10344                 goto dropit;
10345
10346         /* Ignore traffic received during vport shutdown. */
10347         if (vport->load_flag & FC_UNLOADING)
10348                 goto dropit;
10349
10350         /* If NPort discovery is delayed drop incoming ELS */
10351         if ((vport->fc_flag & FC_DISC_DELAYED) &&
10352                         (cmd != ELS_CMD_PLOGI))
10353                 goto dropit;
10354
10355         ndlp = lpfc_findnode_did(vport, did);
10356         if (!ndlp) {
10357                 /* Cannot find existing Fabric ndlp, so allocate a new one */
10358                 ndlp = lpfc_nlp_init(vport, did);
10359                 if (!ndlp)
10360                         goto dropit;
10361                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
10362                 newnode = 1;
10363                 if ((did & Fabric_DID_MASK) == Fabric_DID_MASK)
10364                         ndlp->nlp_type |= NLP_FABRIC;
10365         } else if (ndlp->nlp_state == NLP_STE_UNUSED_NODE) {
10366                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
10367                 newnode = 1;
10368         }
10369
10370         phba->fc_stat.elsRcvFrame++;
10371
10372         /*
10373          * Do not process any unsolicited ELS commands
10374          * if the ndlp is in DEV_LOSS
10375          */
10376         spin_lock_irq(&ndlp->lock);
10377         if (ndlp->nlp_flag & NLP_IN_DEV_LOSS) {
10378                 spin_unlock_irq(&ndlp->lock);
10379                 if (newnode)
10380                         lpfc_nlp_put(ndlp);
10381                 goto dropit;
10382         }
10383         spin_unlock_irq(&ndlp->lock);
10384
10385         elsiocb->ndlp = lpfc_nlp_get(ndlp);
10386         if (!elsiocb->ndlp)
10387                 goto dropit;
10388         elsiocb->vport = vport;
10389
10390         if ((cmd & ELS_CMD_MASK) == ELS_CMD_RSCN) {
10391                 cmd &= ELS_CMD_MASK;
10392         }
10393         /* ELS command <elsCmd> received from NPORT <did> */
10394         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
10395                          "0112 ELS command x%x received from NPORT x%x "
10396                          "refcnt %d Data: x%x x%x x%x x%x\n",
10397                          cmd, did, kref_read(&ndlp->kref), vport->port_state,
10398                          vport->fc_flag, vport->fc_myDID, vport->fc_prevDID);
10399
10400         /* reject till our FLOGI completes or PLOGI assigned DID via PT2PT */
10401         if ((vport->port_state < LPFC_FABRIC_CFG_LINK) &&
10402             (cmd != ELS_CMD_FLOGI) &&
10403             !((cmd == ELS_CMD_PLOGI) && (vport->fc_flag & FC_PT2PT))) {
10404                 rjt_err = LSRJT_LOGICAL_BSY;
10405                 rjt_exp = LSEXP_NOTHING_MORE;
10406                 goto lsrjt;
10407         }
10408
10409         switch (cmd) {
10410         case ELS_CMD_PLOGI:
10411                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10412                         "RCV PLOGI:       did:x%x/ste:x%x flg:x%x",
10413                         did, vport->port_state, ndlp->nlp_flag);
10414
10415                 phba->fc_stat.elsRcvPLOGI++;
10416                 ndlp = lpfc_plogi_confirm_nport(phba, payload, ndlp);
10417                 if (phba->sli_rev == LPFC_SLI_REV4 &&
10418                     (phba->pport->fc_flag & FC_PT2PT)) {
10419                         vport->fc_prevDID = vport->fc_myDID;
10420                         /* Our DID needs to be updated before registering
10421                          * the vfi. This is done in lpfc_rcv_plogi but
10422                          * that is called after the reg_vfi.
10423                          */
10424                         vport->fc_myDID =
10425                                 bf_get(els_rsp64_sid,
10426                                        &elsiocb->wqe.xmit_els_rsp);
10427                         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
10428                                          "3312 Remote port assigned DID x%x "
10429                                          "%x\n", vport->fc_myDID,
10430                                          vport->fc_prevDID);
10431                 }
10432
10433                 lpfc_send_els_event(vport, ndlp, payload);
10434
10435                 /* If Nport discovery is delayed, reject PLOGIs */
10436                 if (vport->fc_flag & FC_DISC_DELAYED) {
10437                         rjt_err = LSRJT_UNABLE_TPC;
10438                         rjt_exp = LSEXP_NOTHING_MORE;
10439                         break;
10440                 }
10441
10442                 if (vport->port_state < LPFC_DISC_AUTH) {
10443                         if (!(phba->pport->fc_flag & FC_PT2PT) ||
10444                                 (phba->pport->fc_flag & FC_PT2PT_PLOGI)) {
10445                                 rjt_err = LSRJT_UNABLE_TPC;
10446                                 rjt_exp = LSEXP_NOTHING_MORE;
10447                                 break;
10448                         }
10449                 }
10450
10451                 spin_lock_irq(&ndlp->lock);
10452                 ndlp->nlp_flag &= ~NLP_TARGET_REMOVE;
10453                 spin_unlock_irq(&ndlp->lock);
10454
10455                 lpfc_disc_state_machine(vport, ndlp, elsiocb,
10456                                         NLP_EVT_RCV_PLOGI);
10457
10458                 break;
10459         case ELS_CMD_FLOGI:
10460                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10461                         "RCV FLOGI:       did:x%x/ste:x%x flg:x%x",
10462                         did, vport->port_state, ndlp->nlp_flag);
10463
10464                 phba->fc_stat.elsRcvFLOGI++;
10465
10466                 /* If the driver believes fabric discovery is done and is ready,
10467                  * bounce the link.  There is some descrepancy.
10468                  */
10469                 if (vport->port_state >= LPFC_LOCAL_CFG_LINK &&
10470                     vport->fc_flag & FC_PT2PT &&
10471                     vport->rcv_flogi_cnt >= 1) {
10472                         rjt_err = LSRJT_LOGICAL_BSY;
10473                         rjt_exp = LSEXP_NOTHING_MORE;
10474                         init_link++;
10475                         goto lsrjt;
10476                 }
10477
10478                 lpfc_els_rcv_flogi(vport, elsiocb, ndlp);
10479                 /* retain node if our response is deferred */
10480                 if (phba->defer_flogi_acc_flag)
10481                         break;
10482                 if (newnode)
10483                         lpfc_disc_state_machine(vport, ndlp, NULL,
10484                                         NLP_EVT_DEVICE_RM);
10485                 break;
10486         case ELS_CMD_LOGO:
10487                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10488                         "RCV LOGO:        did:x%x/ste:x%x flg:x%x",
10489                         did, vport->port_state, ndlp->nlp_flag);
10490
10491                 phba->fc_stat.elsRcvLOGO++;
10492                 lpfc_send_els_event(vport, ndlp, payload);
10493                 if (vport->port_state < LPFC_DISC_AUTH) {
10494                         rjt_err = LSRJT_UNABLE_TPC;
10495                         rjt_exp = LSEXP_NOTHING_MORE;
10496                         break;
10497                 }
10498                 lpfc_disc_state_machine(vport, ndlp, elsiocb, NLP_EVT_RCV_LOGO);
10499                 if (newnode)
10500                         lpfc_disc_state_machine(vport, ndlp, NULL,
10501                                         NLP_EVT_DEVICE_RM);
10502                 break;
10503         case ELS_CMD_PRLO:
10504                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10505                         "RCV PRLO:        did:x%x/ste:x%x flg:x%x",
10506                         did, vport->port_state, ndlp->nlp_flag);
10507
10508                 phba->fc_stat.elsRcvPRLO++;
10509                 lpfc_send_els_event(vport, ndlp, payload);
10510                 if (vport->port_state < LPFC_DISC_AUTH) {
10511                         rjt_err = LSRJT_UNABLE_TPC;
10512                         rjt_exp = LSEXP_NOTHING_MORE;
10513                         break;
10514                 }
10515                 lpfc_disc_state_machine(vport, ndlp, elsiocb, NLP_EVT_RCV_PRLO);
10516                 break;
10517         case ELS_CMD_LCB:
10518                 phba->fc_stat.elsRcvLCB++;
10519                 lpfc_els_rcv_lcb(vport, elsiocb, ndlp);
10520                 break;
10521         case ELS_CMD_RDP:
10522                 phba->fc_stat.elsRcvRDP++;
10523                 lpfc_els_rcv_rdp(vport, elsiocb, ndlp);
10524                 break;
10525         case ELS_CMD_RSCN:
10526                 phba->fc_stat.elsRcvRSCN++;
10527                 lpfc_els_rcv_rscn(vport, elsiocb, ndlp);
10528                 if (newnode)
10529                         lpfc_disc_state_machine(vport, ndlp, NULL,
10530                                         NLP_EVT_DEVICE_RM);
10531                 break;
10532         case ELS_CMD_ADISC:
10533                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10534                         "RCV ADISC:       did:x%x/ste:x%x flg:x%x",
10535                         did, vport->port_state, ndlp->nlp_flag);
10536
10537                 lpfc_send_els_event(vport, ndlp, payload);
10538                 phba->fc_stat.elsRcvADISC++;
10539                 if (vport->port_state < LPFC_DISC_AUTH) {
10540                         rjt_err = LSRJT_UNABLE_TPC;
10541                         rjt_exp = LSEXP_NOTHING_MORE;
10542                         break;
10543                 }
10544                 lpfc_disc_state_machine(vport, ndlp, elsiocb,
10545                                         NLP_EVT_RCV_ADISC);
10546                 break;
10547         case ELS_CMD_PDISC:
10548                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10549                         "RCV PDISC:       did:x%x/ste:x%x flg:x%x",
10550                         did, vport->port_state, ndlp->nlp_flag);
10551
10552                 phba->fc_stat.elsRcvPDISC++;
10553                 if (vport->port_state < LPFC_DISC_AUTH) {
10554                         rjt_err = LSRJT_UNABLE_TPC;
10555                         rjt_exp = LSEXP_NOTHING_MORE;
10556                         break;
10557                 }
10558                 lpfc_disc_state_machine(vport, ndlp, elsiocb,
10559                                         NLP_EVT_RCV_PDISC);
10560                 break;
10561         case ELS_CMD_FARPR:
10562                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10563                         "RCV FARPR:       did:x%x/ste:x%x flg:x%x",
10564                         did, vport->port_state, ndlp->nlp_flag);
10565
10566                 phba->fc_stat.elsRcvFARPR++;
10567                 lpfc_els_rcv_farpr(vport, elsiocb, ndlp);
10568                 break;
10569         case ELS_CMD_FARP:
10570                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10571                         "RCV FARP:        did:x%x/ste:x%x flg:x%x",
10572                         did, vport->port_state, ndlp->nlp_flag);
10573
10574                 phba->fc_stat.elsRcvFARP++;
10575                 lpfc_els_rcv_farp(vport, elsiocb, ndlp);
10576                 break;
10577         case ELS_CMD_FAN:
10578                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10579                         "RCV FAN:         did:x%x/ste:x%x flg:x%x",
10580                         did, vport->port_state, ndlp->nlp_flag);
10581
10582                 phba->fc_stat.elsRcvFAN++;
10583                 lpfc_els_rcv_fan(vport, elsiocb, ndlp);
10584                 break;
10585         case ELS_CMD_PRLI:
10586         case ELS_CMD_NVMEPRLI:
10587                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10588                         "RCV PRLI:        did:x%x/ste:x%x flg:x%x",
10589                         did, vport->port_state, ndlp->nlp_flag);
10590
10591                 phba->fc_stat.elsRcvPRLI++;
10592                 if ((vport->port_state < LPFC_DISC_AUTH) &&
10593                     (vport->fc_flag & FC_FABRIC)) {
10594                         rjt_err = LSRJT_UNABLE_TPC;
10595                         rjt_exp = LSEXP_NOTHING_MORE;
10596                         break;
10597                 }
10598                 lpfc_disc_state_machine(vport, ndlp, elsiocb, NLP_EVT_RCV_PRLI);
10599                 break;
10600         case ELS_CMD_LIRR:
10601                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10602                         "RCV LIRR:        did:x%x/ste:x%x flg:x%x",
10603                         did, vport->port_state, ndlp->nlp_flag);
10604
10605                 phba->fc_stat.elsRcvLIRR++;
10606                 lpfc_els_rcv_lirr(vport, elsiocb, ndlp);
10607                 if (newnode)
10608                         lpfc_disc_state_machine(vport, ndlp, NULL,
10609                                         NLP_EVT_DEVICE_RM);
10610                 break;
10611         case ELS_CMD_RLS:
10612                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10613                         "RCV RLS:         did:x%x/ste:x%x flg:x%x",
10614                         did, vport->port_state, ndlp->nlp_flag);
10615
10616                 phba->fc_stat.elsRcvRLS++;
10617                 lpfc_els_rcv_rls(vport, elsiocb, ndlp);
10618                 if (newnode)
10619                         lpfc_disc_state_machine(vport, ndlp, NULL,
10620                                         NLP_EVT_DEVICE_RM);
10621                 break;
10622         case ELS_CMD_RPL:
10623                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10624                         "RCV RPL:         did:x%x/ste:x%x flg:x%x",
10625                         did, vport->port_state, ndlp->nlp_flag);
10626
10627                 phba->fc_stat.elsRcvRPL++;
10628                 lpfc_els_rcv_rpl(vport, elsiocb, ndlp);
10629                 if (newnode)
10630                         lpfc_disc_state_machine(vport, ndlp, NULL,
10631                                         NLP_EVT_DEVICE_RM);
10632                 break;
10633         case ELS_CMD_RNID:
10634                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10635                         "RCV RNID:        did:x%x/ste:x%x flg:x%x",
10636                         did, vport->port_state, ndlp->nlp_flag);
10637
10638                 phba->fc_stat.elsRcvRNID++;
10639                 lpfc_els_rcv_rnid(vport, elsiocb, ndlp);
10640                 if (newnode)
10641                         lpfc_disc_state_machine(vport, ndlp, NULL,
10642                                         NLP_EVT_DEVICE_RM);
10643                 break;
10644         case ELS_CMD_RTV:
10645                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10646                         "RCV RTV:        did:x%x/ste:x%x flg:x%x",
10647                         did, vport->port_state, ndlp->nlp_flag);
10648                 phba->fc_stat.elsRcvRTV++;
10649                 lpfc_els_rcv_rtv(vport, elsiocb, ndlp);
10650                 if (newnode)
10651                         lpfc_disc_state_machine(vport, ndlp, NULL,
10652                                         NLP_EVT_DEVICE_RM);
10653                 break;
10654         case ELS_CMD_RRQ:
10655                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10656                         "RCV RRQ:         did:x%x/ste:x%x flg:x%x",
10657                         did, vport->port_state, ndlp->nlp_flag);
10658
10659                 phba->fc_stat.elsRcvRRQ++;
10660                 lpfc_els_rcv_rrq(vport, elsiocb, ndlp);
10661                 if (newnode)
10662                         lpfc_disc_state_machine(vport, ndlp, NULL,
10663                                         NLP_EVT_DEVICE_RM);
10664                 break;
10665         case ELS_CMD_ECHO:
10666                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10667                         "RCV ECHO:        did:x%x/ste:x%x flg:x%x",
10668                         did, vport->port_state, ndlp->nlp_flag);
10669
10670                 phba->fc_stat.elsRcvECHO++;
10671                 lpfc_els_rcv_echo(vport, elsiocb, ndlp);
10672                 if (newnode)
10673                         lpfc_disc_state_machine(vport, ndlp, NULL,
10674                                         NLP_EVT_DEVICE_RM);
10675                 break;
10676         case ELS_CMD_REC:
10677                 /* receive this due to exchange closed */
10678                 rjt_err = LSRJT_UNABLE_TPC;
10679                 rjt_exp = LSEXP_INVALID_OX_RX;
10680                 break;
10681         case ELS_CMD_FPIN:
10682                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10683                                       "RCV FPIN:       did:x%x/ste:x%x flg:x%x",
10684                                       did, vport->port_state, ndlp->nlp_flag);
10685
10686                 lpfc_els_rcv_fpin(vport, (struct fc_els_fpin *)payload,
10687                                   payload_len);
10688
10689                 /* There are no replies, so no rjt codes */
10690                 break;
10691         case ELS_CMD_EDC:
10692                 lpfc_els_rcv_edc(vport, elsiocb, ndlp);
10693                 break;
10694         case ELS_CMD_RDF:
10695                 phba->fc_stat.elsRcvRDF++;
10696                 /* Accept RDF only from fabric controller */
10697                 if (did != Fabric_Cntl_DID) {
10698                         lpfc_printf_vlog(vport, KERN_WARNING, LOG_ELS,
10699                                          "1115 Received RDF from invalid DID "
10700                                          "x%x\n", did);
10701                         rjt_err = LSRJT_PROTOCOL_ERR;
10702                         rjt_exp = LSEXP_NOTHING_MORE;
10703                         goto lsrjt;
10704                 }
10705
10706                 lpfc_els_rcv_rdf(vport, elsiocb, ndlp);
10707                 break;
10708         default:
10709                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10710                         "RCV ELS cmd:     cmd:x%x did:x%x/ste:x%x",
10711                         cmd, did, vport->port_state);
10712
10713                 /* Unsupported ELS command, reject */
10714                 rjt_err = LSRJT_CMD_UNSUPPORTED;
10715                 rjt_exp = LSEXP_NOTHING_MORE;
10716
10717                 /* Unknown ELS command <elsCmd> received from NPORT <did> */
10718                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
10719                                  "0115 Unknown ELS command x%x "
10720                                  "received from NPORT x%x\n", cmd, did);
10721                 if (newnode)
10722                         lpfc_disc_state_machine(vport, ndlp, NULL,
10723                                         NLP_EVT_DEVICE_RM);
10724                 break;
10725         }
10726
10727 lsrjt:
10728         /* check if need to LS_RJT received ELS cmd */
10729         if (rjt_err) {
10730                 memset(&stat, 0, sizeof(stat));
10731                 stat.un.b.lsRjtRsnCode = rjt_err;
10732                 stat.un.b.lsRjtRsnCodeExp = rjt_exp;
10733                 lpfc_els_rsp_reject(vport, stat.un.lsRjtError, elsiocb, ndlp,
10734                                     NULL);
10735                 /* Remove the reference from above for new nodes. */
10736                 if (newnode)
10737                         lpfc_disc_state_machine(vport, ndlp, NULL,
10738                                         NLP_EVT_DEVICE_RM);
10739         }
10740
10741         /* Release the reference on this elsiocb, not the ndlp. */
10742         lpfc_nlp_put(elsiocb->ndlp);
10743         elsiocb->ndlp = NULL;
10744
10745         /* Special case.  Driver received an unsolicited command that
10746          * unsupportable given the driver's current state.  Reset the
10747          * link and start over.
10748          */
10749         if (init_link) {
10750                 mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
10751                 if (!mbox)
10752                         return;
10753                 lpfc_linkdown(phba);
10754                 lpfc_init_link(phba, mbox,
10755                                phba->cfg_topology,
10756                                phba->cfg_link_speed);
10757                 mbox->u.mb.un.varInitLnk.lipsr_AL_PA = 0;
10758                 mbox->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
10759                 mbox->vport = vport;
10760                 if (lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT) ==
10761                     MBX_NOT_FINISHED)
10762                         mempool_free(mbox, phba->mbox_mem_pool);
10763         }
10764
10765         return;
10766
10767 dropit:
10768         if (vport && !(vport->load_flag & FC_UNLOADING))
10769                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
10770                         "0111 Dropping received ELS cmd "
10771                         "Data: x%x x%x x%x x%x\n",
10772                         cmd, status, get_job_word4(phba, elsiocb), did);
10773
10774         phba->fc_stat.elsRcvDrop++;
10775 }
10776
10777 /**
10778  * lpfc_els_unsol_event - Process an unsolicited event from an els sli ring
10779  * @phba: pointer to lpfc hba data structure.
10780  * @pring: pointer to a SLI ring.
10781  * @elsiocb: pointer to lpfc els iocb data structure.
10782  *
10783  * This routine is used to process an unsolicited event received from a SLI
10784  * (Service Level Interface) ring. The actual processing of the data buffer
10785  * associated with the unsolicited event is done by invoking the routine
10786  * lpfc_els_unsol_buffer() after properly set up the iocb buffer from the
10787  * SLI ring on which the unsolicited event was received.
10788  **/
10789 void
10790 lpfc_els_unsol_event(struct lpfc_hba *phba, struct lpfc_sli_ring *pring,
10791                      struct lpfc_iocbq *elsiocb)
10792 {
10793         struct lpfc_vport *vport = elsiocb->vport;
10794         u32 ulp_command, status, parameter, bde_count = 0;
10795         IOCB_t *icmd;
10796         struct lpfc_wcqe_complete *wcqe_cmpl = NULL;
10797         struct lpfc_dmabuf *bdeBuf1 = elsiocb->cmd_dmabuf;
10798         struct lpfc_dmabuf *bdeBuf2 = elsiocb->bpl_dmabuf;
10799         dma_addr_t paddr;
10800
10801         elsiocb->cmd_dmabuf = NULL;
10802         elsiocb->rsp_dmabuf = NULL;
10803         elsiocb->bpl_dmabuf = NULL;
10804
10805         wcqe_cmpl = &elsiocb->wcqe_cmpl;
10806         ulp_command = get_job_cmnd(phba, elsiocb);
10807         status = get_job_ulpstatus(phba, elsiocb);
10808         parameter = get_job_word4(phba, elsiocb);
10809         if (phba->sli_rev == LPFC_SLI_REV4)
10810                 bde_count = wcqe_cmpl->word3;
10811         else
10812                 bde_count = elsiocb->iocb.ulpBdeCount;
10813
10814         if (status == IOSTAT_NEED_BUFFER) {
10815                 lpfc_sli_hbqbuf_add_hbqs(phba, LPFC_ELS_HBQ);
10816         } else if (status == IOSTAT_LOCAL_REJECT &&
10817                    (parameter & IOERR_PARAM_MASK) ==
10818                    IOERR_RCV_BUFFER_WAITING) {
10819                 phba->fc_stat.NoRcvBuf++;
10820                 /* Not enough posted buffers; Try posting more buffers */
10821                 if (!(phba->sli3_options & LPFC_SLI3_HBQ_ENABLED))
10822                         lpfc_sli3_post_buffer(phba, pring, 0);
10823                 return;
10824         }
10825
10826         if (phba->sli_rev == LPFC_SLI_REV3) {
10827                 icmd = &elsiocb->iocb;
10828                 if ((phba->sli3_options & LPFC_SLI3_NPIV_ENABLED) &&
10829                     (ulp_command == CMD_IOCB_RCV_ELS64_CX ||
10830                      ulp_command == CMD_IOCB_RCV_SEQ64_CX)) {
10831                         if (icmd->unsli3.rcvsli3.vpi == 0xffff)
10832                                 vport = phba->pport;
10833                         else
10834                                 vport = lpfc_find_vport_by_vpid(phba,
10835                                                 icmd->unsli3.rcvsli3.vpi);
10836                 }
10837         }
10838
10839         /* If there are no BDEs associated
10840          * with this IOCB, there is nothing to do.
10841          */
10842         if (bde_count == 0)
10843                 return;
10844
10845         /* Account for SLI2 or SLI3 and later unsolicited buffering */
10846         if (phba->sli3_options & LPFC_SLI3_HBQ_ENABLED) {
10847                 elsiocb->cmd_dmabuf = bdeBuf1;
10848                 if (bde_count == 2)
10849                         elsiocb->bpl_dmabuf = bdeBuf2;
10850         } else {
10851                 icmd = &elsiocb->iocb;
10852                 paddr = getPaddr(icmd->un.cont64[0].addrHigh,
10853                                  icmd->un.cont64[0].addrLow);
10854                 elsiocb->cmd_dmabuf = lpfc_sli_ringpostbuf_get(phba, pring,
10855                                                                paddr);
10856                 if (bde_count == 2) {
10857                         paddr = getPaddr(icmd->un.cont64[1].addrHigh,
10858                                          icmd->un.cont64[1].addrLow);
10859                         elsiocb->bpl_dmabuf = lpfc_sli_ringpostbuf_get(phba,
10860                                                                         pring,
10861                                                                         paddr);
10862                 }
10863         }
10864
10865         lpfc_els_unsol_buffer(phba, pring, vport, elsiocb);
10866         /*
10867          * The different unsolicited event handlers would tell us
10868          * if they are done with "mp" by setting cmd_dmabuf to NULL.
10869          */
10870         if (elsiocb->cmd_dmabuf) {
10871                 lpfc_in_buf_free(phba, elsiocb->cmd_dmabuf);
10872                 elsiocb->cmd_dmabuf = NULL;
10873         }
10874
10875         if (elsiocb->bpl_dmabuf) {
10876                 lpfc_in_buf_free(phba, elsiocb->bpl_dmabuf);
10877                 elsiocb->bpl_dmabuf = NULL;
10878         }
10879
10880 }
10881
10882 static void
10883 lpfc_start_fdmi(struct lpfc_vport *vport)
10884 {
10885         struct lpfc_nodelist *ndlp;
10886
10887         /* If this is the first time, allocate an ndlp and initialize
10888          * it. Otherwise, make sure the node is enabled and then do the
10889          * login.
10890          */
10891         ndlp = lpfc_findnode_did(vport, FDMI_DID);
10892         if (!ndlp) {
10893                 ndlp = lpfc_nlp_init(vport, FDMI_DID);
10894                 if (ndlp) {
10895                         ndlp->nlp_type |= NLP_FABRIC;
10896                 } else {
10897                         return;
10898                 }
10899         }
10900
10901         lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
10902         lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0);
10903 }
10904
10905 /**
10906  * lpfc_do_scr_ns_plogi - Issue a plogi to the name server for scr
10907  * @phba: pointer to lpfc hba data structure.
10908  * @vport: pointer to a virtual N_Port data structure.
10909  *
10910  * This routine issues a Port Login (PLOGI) to the Name Server with
10911  * State Change Request (SCR) for a @vport. This routine will create an
10912  * ndlp for the Name Server associated to the @vport if such node does
10913  * not already exist. The PLOGI to Name Server is issued by invoking the
10914  * lpfc_issue_els_plogi() routine. If Fabric-Device Management Interface
10915  * (FDMI) is configured to the @vport, a FDMI node will be created and
10916  * the PLOGI to FDMI is issued by invoking lpfc_issue_els_plogi() routine.
10917  **/
10918 void
10919 lpfc_do_scr_ns_plogi(struct lpfc_hba *phba, struct lpfc_vport *vport)
10920 {
10921         struct lpfc_nodelist *ndlp;
10922         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
10923
10924         /*
10925          * If lpfc_delay_discovery parameter is set and the clean address
10926          * bit is cleared and fc fabric parameters chenged, delay FC NPort
10927          * discovery.
10928          */
10929         spin_lock_irq(shost->host_lock);
10930         if (vport->fc_flag & FC_DISC_DELAYED) {
10931                 spin_unlock_irq(shost->host_lock);
10932                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
10933                                  "3334 Delay fc port discovery for %d secs\n",
10934                                  phba->fc_ratov);
10935                 mod_timer(&vport->delayed_disc_tmo,
10936                         jiffies + msecs_to_jiffies(1000 * phba->fc_ratov));
10937                 return;
10938         }
10939         spin_unlock_irq(shost->host_lock);
10940
10941         ndlp = lpfc_findnode_did(vport, NameServer_DID);
10942         if (!ndlp) {
10943                 ndlp = lpfc_nlp_init(vport, NameServer_DID);
10944                 if (!ndlp) {
10945                         if (phba->fc_topology == LPFC_TOPOLOGY_LOOP) {
10946                                 lpfc_disc_start(vport);
10947                                 return;
10948                         }
10949                         lpfc_vport_set_state(vport, FC_VPORT_FAILED);
10950                         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
10951                                          "0251 NameServer login: no memory\n");
10952                         return;
10953                 }
10954         }
10955
10956         ndlp->nlp_type |= NLP_FABRIC;
10957
10958         lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
10959
10960         if (lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0)) {
10961                 lpfc_vport_set_state(vport, FC_VPORT_FAILED);
10962                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
10963                                  "0252 Cannot issue NameServer login\n");
10964                 return;
10965         }
10966
10967         if ((phba->cfg_enable_SmartSAN ||
10968              (phba->cfg_fdmi_on == LPFC_FDMI_SUPPORT)) &&
10969              (vport->load_flag & FC_ALLOW_FDMI))
10970                 lpfc_start_fdmi(vport);
10971 }
10972
10973 /**
10974  * lpfc_cmpl_reg_new_vport - Completion callback function to register new vport
10975  * @phba: pointer to lpfc hba data structure.
10976  * @pmb: pointer to the driver internal queue element for mailbox command.
10977  *
10978  * This routine is the completion callback function to register new vport
10979  * mailbox command. If the new vport mailbox command completes successfully,
10980  * the fabric registration login shall be performed on physical port (the
10981  * new vport created is actually a physical port, with VPI 0) or the port
10982  * login to Name Server for State Change Request (SCR) will be performed
10983  * on virtual port (real virtual port, with VPI greater than 0).
10984  **/
10985 static void
10986 lpfc_cmpl_reg_new_vport(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
10987 {
10988         struct lpfc_vport *vport = pmb->vport;
10989         struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
10990         struct lpfc_nodelist *ndlp = pmb->ctx_ndlp;
10991         MAILBOX_t *mb = &pmb->u.mb;
10992         int rc;
10993
10994         spin_lock_irq(shost->host_lock);
10995         vport->fc_flag &= ~FC_VPORT_NEEDS_REG_VPI;
10996         spin_unlock_irq(shost->host_lock);
10997
10998         if (mb->mbxStatus) {
10999                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
11000                                 "0915 Register VPI failed : Status: x%x"
11001                                 " upd bit: x%x \n", mb->mbxStatus,
11002                                  mb->un.varRegVpi.upd);
11003                 if (phba->sli_rev == LPFC_SLI_REV4 &&
11004                         mb->un.varRegVpi.upd)
11005                         goto mbox_err_exit ;
11006
11007                 switch (mb->mbxStatus) {
11008                 case 0x11:      /* unsupported feature */
11009                 case 0x9603:    /* max_vpi exceeded */
11010                 case 0x9602:    /* Link event since CLEAR_LA */
11011                         /* giving up on vport registration */
11012                         lpfc_vport_set_state(vport, FC_VPORT_FAILED);
11013                         spin_lock_irq(shost->host_lock);
11014                         vport->fc_flag &= ~(FC_FABRIC | FC_PUBLIC_LOOP);
11015                         spin_unlock_irq(shost->host_lock);
11016                         lpfc_can_disctmo(vport);
11017                         break;
11018                 /* If reg_vpi fail with invalid VPI status, re-init VPI */
11019                 case 0x20:
11020                         spin_lock_irq(shost->host_lock);
11021                         vport->fc_flag |= FC_VPORT_NEEDS_REG_VPI;
11022                         spin_unlock_irq(shost->host_lock);
11023                         lpfc_init_vpi(phba, pmb, vport->vpi);
11024                         pmb->vport = vport;
11025                         pmb->mbox_cmpl = lpfc_init_vpi_cmpl;
11026                         rc = lpfc_sli_issue_mbox(phba, pmb,
11027                                 MBX_NOWAIT);
11028                         if (rc == MBX_NOT_FINISHED) {
11029                                 lpfc_printf_vlog(vport, KERN_ERR,
11030                                                  LOG_TRACE_EVENT,
11031                                         "2732 Failed to issue INIT_VPI"
11032                                         " mailbox command\n");
11033                         } else {
11034                                 lpfc_nlp_put(ndlp);
11035                                 return;
11036                         }
11037                         fallthrough;
11038                 default:
11039                         /* Try to recover from this error */
11040                         if (phba->sli_rev == LPFC_SLI_REV4)
11041                                 lpfc_sli4_unreg_all_rpis(vport);
11042                         lpfc_mbx_unreg_vpi(vport);
11043                         spin_lock_irq(shost->host_lock);
11044                         vport->fc_flag |= FC_VPORT_NEEDS_REG_VPI;
11045                         spin_unlock_irq(shost->host_lock);
11046                         if (mb->mbxStatus == MBX_NOT_FINISHED)
11047                                 break;
11048                         if ((vport->port_type == LPFC_PHYSICAL_PORT) &&
11049                             !(vport->fc_flag & FC_LOGO_RCVD_DID_CHNG)) {
11050                                 if (phba->sli_rev == LPFC_SLI_REV4)
11051                                         lpfc_issue_init_vfi(vport);
11052                                 else
11053                                         lpfc_initial_flogi(vport);
11054                         } else {
11055                                 lpfc_initial_fdisc(vport);
11056                         }
11057                         break;
11058                 }
11059         } else {
11060                 spin_lock_irq(shost->host_lock);
11061                 vport->vpi_state |= LPFC_VPI_REGISTERED;
11062                 spin_unlock_irq(shost->host_lock);
11063                 if (vport == phba->pport) {
11064                         if (phba->sli_rev < LPFC_SLI_REV4)
11065                                 lpfc_issue_fabric_reglogin(vport);
11066                         else {
11067                                 /*
11068                                  * If the physical port is instantiated using
11069                                  * FDISC, do not start vport discovery.
11070                                  */
11071                                 if (vport->port_state != LPFC_FDISC)
11072                                         lpfc_start_fdiscs(phba);
11073                                 lpfc_do_scr_ns_plogi(phba, vport);
11074                         }
11075                 } else {
11076                         lpfc_do_scr_ns_plogi(phba, vport);
11077                 }
11078         }
11079 mbox_err_exit:
11080         /* Now, we decrement the ndlp reference count held for this
11081          * callback function
11082          */
11083         lpfc_nlp_put(ndlp);
11084
11085         mempool_free(pmb, phba->mbox_mem_pool);
11086         return;
11087 }
11088
11089 /**
11090  * lpfc_register_new_vport - Register a new vport with a HBA
11091  * @phba: pointer to lpfc hba data structure.
11092  * @vport: pointer to a host virtual N_Port data structure.
11093  * @ndlp: pointer to a node-list data structure.
11094  *
11095  * This routine registers the @vport as a new virtual port with a HBA.
11096  * It is done through a registering vpi mailbox command.
11097  **/
11098 void
11099 lpfc_register_new_vport(struct lpfc_hba *phba, struct lpfc_vport *vport,
11100                         struct lpfc_nodelist *ndlp)
11101 {
11102         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
11103         LPFC_MBOXQ_t *mbox;
11104
11105         mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
11106         if (mbox) {
11107                 lpfc_reg_vpi(vport, mbox);
11108                 mbox->vport = vport;
11109                 mbox->ctx_ndlp = lpfc_nlp_get(ndlp);
11110                 if (!mbox->ctx_ndlp) {
11111                         mempool_free(mbox, phba->mbox_mem_pool);
11112                         goto mbox_err_exit;
11113                 }
11114
11115                 mbox->mbox_cmpl = lpfc_cmpl_reg_new_vport;
11116                 if (lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT)
11117                     == MBX_NOT_FINISHED) {
11118                         /* mailbox command not success, decrement ndlp
11119                          * reference count for this command
11120                          */
11121                         lpfc_nlp_put(ndlp);
11122                         mempool_free(mbox, phba->mbox_mem_pool);
11123
11124                         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
11125                                 "0253 Register VPI: Can't send mbox\n");
11126                         goto mbox_err_exit;
11127                 }
11128         } else {
11129                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
11130                                  "0254 Register VPI: no memory\n");
11131                 goto mbox_err_exit;
11132         }
11133         return;
11134
11135 mbox_err_exit:
11136         lpfc_vport_set_state(vport, FC_VPORT_FAILED);
11137         spin_lock_irq(shost->host_lock);
11138         vport->fc_flag &= ~FC_VPORT_NEEDS_REG_VPI;
11139         spin_unlock_irq(shost->host_lock);
11140         return;
11141 }
11142
11143 /**
11144  * lpfc_cancel_all_vport_retry_delay_timer - Cancel all vport retry delay timer
11145  * @phba: pointer to lpfc hba data structure.
11146  *
11147  * This routine cancels the retry delay timers to all the vports.
11148  **/
11149 void
11150 lpfc_cancel_all_vport_retry_delay_timer(struct lpfc_hba *phba)
11151 {
11152         struct lpfc_vport **vports;
11153         struct lpfc_nodelist *ndlp;
11154         uint32_t link_state;
11155         int i;
11156
11157         /* Treat this failure as linkdown for all vports */
11158         link_state = phba->link_state;
11159         lpfc_linkdown(phba);
11160         phba->link_state = link_state;
11161
11162         vports = lpfc_create_vport_work_array(phba);
11163
11164         if (vports) {
11165                 for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
11166                         ndlp = lpfc_findnode_did(vports[i], Fabric_DID);
11167                         if (ndlp)
11168                                 lpfc_cancel_retry_delay_tmo(vports[i], ndlp);
11169                         lpfc_els_flush_cmd(vports[i]);
11170                 }
11171                 lpfc_destroy_vport_work_array(phba, vports);
11172         }
11173 }
11174
11175 /**
11176  * lpfc_retry_pport_discovery - Start timer to retry FLOGI.
11177  * @phba: pointer to lpfc hba data structure.
11178  *
11179  * This routine abort all pending discovery commands and
11180  * start a timer to retry FLOGI for the physical port
11181  * discovery.
11182  **/
11183 void
11184 lpfc_retry_pport_discovery(struct lpfc_hba *phba)
11185 {
11186         struct lpfc_nodelist *ndlp;
11187
11188         /* Cancel the all vports retry delay retry timers */
11189         lpfc_cancel_all_vport_retry_delay_timer(phba);
11190
11191         /* If fabric require FLOGI, then re-instantiate physical login */
11192         ndlp = lpfc_findnode_did(phba->pport, Fabric_DID);
11193         if (!ndlp)
11194                 return;
11195
11196         mod_timer(&ndlp->nlp_delayfunc, jiffies + msecs_to_jiffies(1000));
11197         spin_lock_irq(&ndlp->lock);
11198         ndlp->nlp_flag |= NLP_DELAY_TMO;
11199         spin_unlock_irq(&ndlp->lock);
11200         ndlp->nlp_last_elscmd = ELS_CMD_FLOGI;
11201         phba->pport->port_state = LPFC_FLOGI;
11202         return;
11203 }
11204
11205 /**
11206  * lpfc_fabric_login_reqd - Check if FLOGI required.
11207  * @phba: pointer to lpfc hba data structure.
11208  * @cmdiocb: pointer to FDISC command iocb.
11209  * @rspiocb: pointer to FDISC response iocb.
11210  *
11211  * This routine checks if a FLOGI is reguired for FDISC
11212  * to succeed.
11213  **/
11214 static int
11215 lpfc_fabric_login_reqd(struct lpfc_hba *phba,
11216                 struct lpfc_iocbq *cmdiocb,
11217                 struct lpfc_iocbq *rspiocb)
11218 {
11219         u32 ulp_status = get_job_ulpstatus(phba, rspiocb);
11220         u32 ulp_word4 = get_job_word4(phba, rspiocb);
11221
11222         if (ulp_status != IOSTAT_FABRIC_RJT ||
11223             ulp_word4 != RJT_LOGIN_REQUIRED)
11224                 return 0;
11225         else
11226                 return 1;
11227 }
11228
11229 /**
11230  * lpfc_cmpl_els_fdisc - Completion function for fdisc iocb command
11231  * @phba: pointer to lpfc hba data structure.
11232  * @cmdiocb: pointer to lpfc command iocb data structure.
11233  * @rspiocb: pointer to lpfc response iocb data structure.
11234  *
11235  * This routine is the completion callback function to a Fabric Discover
11236  * (FDISC) ELS command. Since all the FDISC ELS commands are issued
11237  * single threaded, each FDISC completion callback function will reset
11238  * the discovery timer for all vports such that the timers will not get
11239  * unnecessary timeout. The function checks the FDISC IOCB status. If error
11240  * detected, the vport will be set to FC_VPORT_FAILED state. Otherwise,the
11241  * vport will set to FC_VPORT_ACTIVE state. It then checks whether the DID
11242  * assigned to the vport has been changed with the completion of the FDISC
11243  * command. If so, both RPI (Remote Port Index) and VPI (Virtual Port Index)
11244  * are unregistered from the HBA, and then the lpfc_register_new_vport()
11245  * routine is invoked to register new vport with the HBA. Otherwise, the
11246  * lpfc_do_scr_ns_plogi() routine is invoked to issue a PLOGI to the Name
11247  * Server for State Change Request (SCR).
11248  **/
11249 static void
11250 lpfc_cmpl_els_fdisc(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
11251                     struct lpfc_iocbq *rspiocb)
11252 {
11253         struct lpfc_vport *vport = cmdiocb->vport;
11254         struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
11255         struct lpfc_nodelist *ndlp = cmdiocb->ndlp;
11256         struct lpfc_nodelist *np;
11257         struct lpfc_nodelist *next_np;
11258         struct lpfc_iocbq *piocb;
11259         struct lpfc_dmabuf *pcmd = cmdiocb->cmd_dmabuf, *prsp;
11260         struct serv_parm *sp;
11261         uint8_t fabric_param_changed;
11262         u32 ulp_status, ulp_word4;
11263
11264         ulp_status = get_job_ulpstatus(phba, rspiocb);
11265         ulp_word4 = get_job_word4(phba, rspiocb);
11266
11267         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
11268                          "0123 FDISC completes. x%x/x%x prevDID: x%x\n",
11269                          ulp_status, ulp_word4,
11270                          vport->fc_prevDID);
11271         /* Since all FDISCs are being single threaded, we
11272          * must reset the discovery timer for ALL vports
11273          * waiting to send FDISC when one completes.
11274          */
11275         list_for_each_entry(piocb, &phba->fabric_iocb_list, list) {
11276                 lpfc_set_disctmo(piocb->vport);
11277         }
11278
11279         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
11280                 "FDISC cmpl:      status:x%x/x%x prevdid:x%x",
11281                 ulp_status, ulp_word4, vport->fc_prevDID);
11282
11283         if (ulp_status) {
11284
11285                 if (lpfc_fabric_login_reqd(phba, cmdiocb, rspiocb)) {
11286                         lpfc_retry_pport_discovery(phba);
11287                         goto out;
11288                 }
11289
11290                 /* Check for retry */
11291                 if (lpfc_els_retry(phba, cmdiocb, rspiocb))
11292                         goto out;
11293                 /* FDISC failed */
11294                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
11295                                  "0126 FDISC failed. (x%x/x%x)\n",
11296                                  ulp_status, ulp_word4);
11297                 goto fdisc_failed;
11298         }
11299
11300         lpfc_check_nlp_post_devloss(vport, ndlp);
11301
11302         spin_lock_irq(shost->host_lock);
11303         vport->fc_flag &= ~FC_VPORT_CVL_RCVD;
11304         vport->fc_flag &= ~FC_VPORT_LOGO_RCVD;
11305         vport->fc_flag |= FC_FABRIC;
11306         if (vport->phba->fc_topology == LPFC_TOPOLOGY_LOOP)
11307                 vport->fc_flag |=  FC_PUBLIC_LOOP;
11308         spin_unlock_irq(shost->host_lock);
11309
11310         vport->fc_myDID = ulp_word4 & Mask_DID;
11311         lpfc_vport_set_state(vport, FC_VPORT_ACTIVE);
11312         prsp = list_get_first(&pcmd->list, struct lpfc_dmabuf, list);
11313         if (!prsp)
11314                 goto out;
11315         sp = prsp->virt + sizeof(uint32_t);
11316         fabric_param_changed = lpfc_check_clean_addr_bit(vport, sp);
11317         memcpy(&vport->fabric_portname, &sp->portName,
11318                 sizeof(struct lpfc_name));
11319         memcpy(&vport->fabric_nodename, &sp->nodeName,
11320                 sizeof(struct lpfc_name));
11321         if (fabric_param_changed &&
11322                 !(vport->fc_flag & FC_VPORT_NEEDS_REG_VPI)) {
11323                 /* If our NportID changed, we need to ensure all
11324                  * remaining NPORTs get unreg_login'ed so we can
11325                  * issue unreg_vpi.
11326                  */
11327                 list_for_each_entry_safe(np, next_np,
11328                         &vport->fc_nodes, nlp_listp) {
11329                         if ((np->nlp_state != NLP_STE_NPR_NODE) ||
11330                             !(np->nlp_flag & NLP_NPR_ADISC))
11331                                 continue;
11332                         spin_lock_irq(&ndlp->lock);
11333                         np->nlp_flag &= ~NLP_NPR_ADISC;
11334                         spin_unlock_irq(&ndlp->lock);
11335                         lpfc_unreg_rpi(vport, np);
11336                 }
11337                 lpfc_cleanup_pending_mbox(vport);
11338
11339                 if (phba->sli_rev == LPFC_SLI_REV4)
11340                         lpfc_sli4_unreg_all_rpis(vport);
11341
11342                 lpfc_mbx_unreg_vpi(vport);
11343                 spin_lock_irq(shost->host_lock);
11344                 vport->fc_flag |= FC_VPORT_NEEDS_REG_VPI;
11345                 if (phba->sli_rev == LPFC_SLI_REV4)
11346                         vport->fc_flag |= FC_VPORT_NEEDS_INIT_VPI;
11347                 else
11348                         vport->fc_flag |= FC_LOGO_RCVD_DID_CHNG;
11349                 spin_unlock_irq(shost->host_lock);
11350         } else if ((phba->sli_rev == LPFC_SLI_REV4) &&
11351                 !(vport->fc_flag & FC_VPORT_NEEDS_REG_VPI)) {
11352                 /*
11353                  * Driver needs to re-reg VPI in order for f/w
11354                  * to update the MAC address.
11355                  */
11356                 lpfc_register_new_vport(phba, vport, ndlp);
11357                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
11358                 goto out;
11359         }
11360
11361         if (vport->fc_flag & FC_VPORT_NEEDS_INIT_VPI)
11362                 lpfc_issue_init_vpi(vport);
11363         else if (vport->fc_flag & FC_VPORT_NEEDS_REG_VPI)
11364                 lpfc_register_new_vport(phba, vport, ndlp);
11365         else
11366                 lpfc_do_scr_ns_plogi(phba, vport);
11367
11368         /* The FDISC completed successfully. Move the fabric ndlp to
11369          * UNMAPPED state and register with the transport.
11370          */
11371         lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
11372         goto out;
11373
11374 fdisc_failed:
11375         if (vport->fc_vport &&
11376             (vport->fc_vport->vport_state != FC_VPORT_NO_FABRIC_RSCS))
11377                 lpfc_vport_set_state(vport, FC_VPORT_FAILED);
11378         /* Cancel discovery timer */
11379         lpfc_can_disctmo(vport);
11380 out:
11381         lpfc_els_free_iocb(phba, cmdiocb);
11382         lpfc_nlp_put(ndlp);
11383 }
11384
11385 /**
11386  * lpfc_issue_els_fdisc - Issue a fdisc iocb command
11387  * @vport: pointer to a virtual N_Port data structure.
11388  * @ndlp: pointer to a node-list data structure.
11389  * @retry: number of retries to the command IOCB.
11390  *
11391  * This routine prepares and issues a Fabric Discover (FDISC) IOCB to
11392  * a remote node (@ndlp) off a @vport. It uses the lpfc_issue_fabric_iocb()
11393  * routine to issue the IOCB, which makes sure only one outstanding fabric
11394  * IOCB will be sent off HBA at any given time.
11395  *
11396  * Note that the ndlp reference count will be incremented by 1 for holding the
11397  * ndlp and the reference to ndlp will be stored into the ndlp field of
11398  * the IOCB for the completion callback function to the FDISC ELS command.
11399  *
11400  * Return code
11401  *   0 - Successfully issued fdisc iocb command
11402  *   1 - Failed to issue fdisc iocb command
11403  **/
11404 static int
11405 lpfc_issue_els_fdisc(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
11406                      uint8_t retry)
11407 {
11408         struct lpfc_hba *phba = vport->phba;
11409         IOCB_t *icmd;
11410         union lpfc_wqe128 *wqe = NULL;
11411         struct lpfc_iocbq *elsiocb;
11412         struct serv_parm *sp;
11413         uint8_t *pcmd;
11414         uint16_t cmdsize;
11415         int did = ndlp->nlp_DID;
11416         int rc;
11417
11418         vport->port_state = LPFC_FDISC;
11419         vport->fc_myDID = 0;
11420         cmdsize = (sizeof(uint32_t) + sizeof(struct serv_parm));
11421         elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, retry, ndlp, did,
11422                                      ELS_CMD_FDISC);
11423         if (!elsiocb) {
11424                 lpfc_vport_set_state(vport, FC_VPORT_FAILED);
11425                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
11426                                  "0255 Issue FDISC: no IOCB\n");
11427                 return 1;
11428         }
11429
11430         if (phba->sli_rev == LPFC_SLI_REV4) {
11431                 wqe = &elsiocb->wqe;
11432                 bf_set(els_req64_sid, &wqe->els_req, 0);
11433                 bf_set(els_req64_sp, &wqe->els_req, 1);
11434         } else {
11435                 icmd = &elsiocb->iocb;
11436                 icmd->un.elsreq64.myID = 0;
11437                 icmd->un.elsreq64.fl = 1;
11438                 icmd->ulpCt_h = 1;
11439                 icmd->ulpCt_l = 0;
11440         }
11441
11442         pcmd = (uint8_t *)elsiocb->cmd_dmabuf->virt;
11443         *((uint32_t *) (pcmd)) = ELS_CMD_FDISC;
11444         pcmd += sizeof(uint32_t); /* CSP Word 1 */
11445         memcpy(pcmd, &vport->phba->pport->fc_sparam, sizeof(struct serv_parm));
11446         sp = (struct serv_parm *) pcmd;
11447         /* Setup CSPs accordingly for Fabric */
11448         sp->cmn.e_d_tov = 0;
11449         sp->cmn.w2.r_a_tov = 0;
11450         sp->cmn.virtual_fabric_support = 0;
11451         sp->cls1.classValid = 0;
11452         sp->cls2.seqDelivery = 1;
11453         sp->cls3.seqDelivery = 1;
11454
11455         pcmd += sizeof(uint32_t); /* CSP Word 2 */
11456         pcmd += sizeof(uint32_t); /* CSP Word 3 */
11457         pcmd += sizeof(uint32_t); /* CSP Word 4 */
11458         pcmd += sizeof(uint32_t); /* Port Name */
11459         memcpy(pcmd, &vport->fc_portname, 8);
11460         pcmd += sizeof(uint32_t); /* Node Name */
11461         pcmd += sizeof(uint32_t); /* Node Name */
11462         memcpy(pcmd, &vport->fc_nodename, 8);
11463         sp->cmn.valid_vendor_ver_level = 0;
11464         memset(sp->un.vendorVersion, 0, sizeof(sp->un.vendorVersion));
11465         lpfc_set_disctmo(vport);
11466
11467         phba->fc_stat.elsXmitFDISC++;
11468         elsiocb->cmd_cmpl = lpfc_cmpl_els_fdisc;
11469
11470         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
11471                 "Issue FDISC:     did:x%x",
11472                 did, 0, 0);
11473
11474         elsiocb->ndlp = lpfc_nlp_get(ndlp);
11475         if (!elsiocb->ndlp)
11476                 goto err_out;
11477
11478         rc = lpfc_issue_fabric_iocb(phba, elsiocb);
11479         if (rc == IOCB_ERROR) {
11480                 lpfc_nlp_put(ndlp);
11481                 goto err_out;
11482         }
11483
11484         lpfc_vport_set_state(vport, FC_VPORT_INITIALIZING);
11485         return 0;
11486
11487  err_out:
11488         lpfc_els_free_iocb(phba, elsiocb);
11489         lpfc_vport_set_state(vport, FC_VPORT_FAILED);
11490         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
11491                          "0256 Issue FDISC: Cannot send IOCB\n");
11492         return 1;
11493 }
11494
11495 /**
11496  * lpfc_cmpl_els_npiv_logo - Completion function with vport logo
11497  * @phba: pointer to lpfc hba data structure.
11498  * @cmdiocb: pointer to lpfc command iocb data structure.
11499  * @rspiocb: pointer to lpfc response iocb data structure.
11500  *
11501  * This routine is the completion callback function to the issuing of a LOGO
11502  * ELS command off a vport. It frees the command IOCB and then decrement the
11503  * reference count held on ndlp for this completion function, indicating that
11504  * the reference to the ndlp is no long needed. Note that the
11505  * lpfc_els_free_iocb() routine decrements the ndlp reference held for this
11506  * callback function and an additional explicit ndlp reference decrementation
11507  * will trigger the actual release of the ndlp.
11508  **/
11509 static void
11510 lpfc_cmpl_els_npiv_logo(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
11511                         struct lpfc_iocbq *rspiocb)
11512 {
11513         struct lpfc_vport *vport = cmdiocb->vport;
11514         IOCB_t *irsp;
11515         struct lpfc_nodelist *ndlp;
11516         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
11517         u32 ulp_status, ulp_word4, did, tmo;
11518
11519         ndlp = cmdiocb->ndlp;
11520
11521         ulp_status = get_job_ulpstatus(phba, rspiocb);
11522         ulp_word4 = get_job_word4(phba, rspiocb);
11523
11524         if (phba->sli_rev == LPFC_SLI_REV4) {
11525                 did = get_job_els_rsp64_did(phba, cmdiocb);
11526                 tmo = get_wqe_tmo(cmdiocb);
11527         } else {
11528                 irsp = &rspiocb->iocb;
11529                 did = get_job_els_rsp64_did(phba, rspiocb);
11530                 tmo = irsp->ulpTimeout;
11531         }
11532
11533         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
11534                 "LOGO npiv cmpl:  status:x%x/x%x did:x%x",
11535                 ulp_status, ulp_word4, did);
11536
11537         /* NPIV LOGO completes to NPort <nlp_DID> */
11538         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
11539                          "2928 NPIV LOGO completes to NPort x%x "
11540                          "Data: x%x x%x x%x x%x x%x x%x x%x\n",
11541                          ndlp->nlp_DID, ulp_status, ulp_word4,
11542                          tmo, vport->num_disc_nodes,
11543                          kref_read(&ndlp->kref), ndlp->nlp_flag,
11544                          ndlp->fc4_xpt_flags);
11545
11546         if (ulp_status == IOSTAT_SUCCESS) {
11547                 spin_lock_irq(shost->host_lock);
11548                 vport->fc_flag &= ~FC_NDISC_ACTIVE;
11549                 vport->fc_flag &= ~FC_FABRIC;
11550                 spin_unlock_irq(shost->host_lock);
11551                 lpfc_can_disctmo(vport);
11552         }
11553
11554         if (ndlp->save_flags & NLP_WAIT_FOR_LOGO) {
11555                 /* Wake up lpfc_vport_delete if waiting...*/
11556                 if (ndlp->logo_waitq)
11557                         wake_up(ndlp->logo_waitq);
11558                 spin_lock_irq(&ndlp->lock);
11559                 ndlp->nlp_flag &= ~(NLP_ISSUE_LOGO | NLP_LOGO_SND);
11560                 ndlp->save_flags &= ~NLP_WAIT_FOR_LOGO;
11561                 spin_unlock_irq(&ndlp->lock);
11562         }
11563
11564         /* Safe to release resources now. */
11565         lpfc_els_free_iocb(phba, cmdiocb);
11566         lpfc_nlp_put(ndlp);
11567 }
11568
11569 /**
11570  * lpfc_issue_els_npiv_logo - Issue a logo off a vport
11571  * @vport: pointer to a virtual N_Port data structure.
11572  * @ndlp: pointer to a node-list data structure.
11573  *
11574  * This routine issues a LOGO ELS command to an @ndlp off a @vport.
11575  *
11576  * Note that the ndlp reference count will be incremented by 1 for holding the
11577  * ndlp and the reference to ndlp will be stored into the ndlp field of
11578  * the IOCB for the completion callback function to the LOGO ELS command.
11579  *
11580  * Return codes
11581  *   0 - Successfully issued logo off the @vport
11582  *   1 - Failed to issue logo off the @vport
11583  **/
11584 int
11585 lpfc_issue_els_npiv_logo(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
11586 {
11587         int rc = 0;
11588         struct lpfc_hba  *phba = vport->phba;
11589         struct lpfc_iocbq *elsiocb;
11590         uint8_t *pcmd;
11591         uint16_t cmdsize;
11592
11593         cmdsize = 2 * sizeof(uint32_t) + sizeof(struct lpfc_name);
11594         elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, 0, ndlp, ndlp->nlp_DID,
11595                                      ELS_CMD_LOGO);
11596         if (!elsiocb)
11597                 return 1;
11598
11599         pcmd = (uint8_t *)elsiocb->cmd_dmabuf->virt;
11600         *((uint32_t *) (pcmd)) = ELS_CMD_LOGO;
11601         pcmd += sizeof(uint32_t);
11602
11603         /* Fill in LOGO payload */
11604         *((uint32_t *) (pcmd)) = be32_to_cpu(vport->fc_myDID);
11605         pcmd += sizeof(uint32_t);
11606         memcpy(pcmd, &vport->fc_portname, sizeof(struct lpfc_name));
11607
11608         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
11609                 "Issue LOGO npiv  did:x%x flg:x%x",
11610                 ndlp->nlp_DID, ndlp->nlp_flag, 0);
11611
11612         elsiocb->cmd_cmpl = lpfc_cmpl_els_npiv_logo;
11613         spin_lock_irq(&ndlp->lock);
11614         ndlp->nlp_flag |= NLP_LOGO_SND;
11615         spin_unlock_irq(&ndlp->lock);
11616         elsiocb->ndlp = lpfc_nlp_get(ndlp);
11617         if (!elsiocb->ndlp) {
11618                 lpfc_els_free_iocb(phba, elsiocb);
11619                 goto err;
11620         }
11621
11622         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
11623         if (rc == IOCB_ERROR) {
11624                 lpfc_els_free_iocb(phba, elsiocb);
11625                 lpfc_nlp_put(ndlp);
11626                 goto err;
11627         }
11628         return 0;
11629
11630 err:
11631         spin_lock_irq(&ndlp->lock);
11632         ndlp->nlp_flag &= ~NLP_LOGO_SND;
11633         spin_unlock_irq(&ndlp->lock);
11634         return 1;
11635 }
11636
11637 /**
11638  * lpfc_fabric_block_timeout - Handler function to the fabric block timer
11639  * @t: timer context used to obtain the lpfc hba.
11640  *
11641  * This routine is invoked by the fabric iocb block timer after
11642  * timeout. It posts the fabric iocb block timeout event by setting the
11643  * WORKER_FABRIC_BLOCK_TMO bit to work port event bitmap and then invokes
11644  * lpfc_worker_wake_up() routine to wake up the worker thread. It is for
11645  * the worker thread to invoke the lpfc_unblock_fabric_iocbs() on the
11646  * posted event WORKER_FABRIC_BLOCK_TMO.
11647  **/
11648 void
11649 lpfc_fabric_block_timeout(struct timer_list *t)
11650 {
11651         struct lpfc_hba  *phba = from_timer(phba, t, fabric_block_timer);
11652         unsigned long iflags;
11653         uint32_t tmo_posted;
11654
11655         spin_lock_irqsave(&phba->pport->work_port_lock, iflags);
11656         tmo_posted = phba->pport->work_port_events & WORKER_FABRIC_BLOCK_TMO;
11657         if (!tmo_posted)
11658                 phba->pport->work_port_events |= WORKER_FABRIC_BLOCK_TMO;
11659         spin_unlock_irqrestore(&phba->pport->work_port_lock, iflags);
11660
11661         if (!tmo_posted)
11662                 lpfc_worker_wake_up(phba);
11663         return;
11664 }
11665
11666 /**
11667  * lpfc_resume_fabric_iocbs - Issue a fabric iocb from driver internal list
11668  * @phba: pointer to lpfc hba data structure.
11669  *
11670  * This routine issues one fabric iocb from the driver internal list to
11671  * the HBA. It first checks whether it's ready to issue one fabric iocb to
11672  * the HBA (whether there is no outstanding fabric iocb). If so, it shall
11673  * remove one pending fabric iocb from the driver internal list and invokes
11674  * lpfc_sli_issue_iocb() routine to send the fabric iocb to the HBA.
11675  **/
11676 static void
11677 lpfc_resume_fabric_iocbs(struct lpfc_hba *phba)
11678 {
11679         struct lpfc_iocbq *iocb;
11680         unsigned long iflags;
11681         int ret;
11682
11683 repeat:
11684         iocb = NULL;
11685         spin_lock_irqsave(&phba->hbalock, iflags);
11686         /* Post any pending iocb to the SLI layer */
11687         if (atomic_read(&phba->fabric_iocb_count) == 0) {
11688                 list_remove_head(&phba->fabric_iocb_list, iocb, typeof(*iocb),
11689                                  list);
11690                 if (iocb)
11691                         /* Increment fabric iocb count to hold the position */
11692                         atomic_inc(&phba->fabric_iocb_count);
11693         }
11694         spin_unlock_irqrestore(&phba->hbalock, iflags);
11695         if (iocb) {
11696                 iocb->fabric_cmd_cmpl = iocb->cmd_cmpl;
11697                 iocb->cmd_cmpl = lpfc_cmpl_fabric_iocb;
11698                 iocb->cmd_flag |= LPFC_IO_FABRIC;
11699
11700                 lpfc_debugfs_disc_trc(iocb->vport, LPFC_DISC_TRC_ELS_CMD,
11701                                       "Fabric sched1:   ste:x%x",
11702                                       iocb->vport->port_state, 0, 0);
11703
11704                 ret = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, iocb, 0);
11705
11706                 if (ret == IOCB_ERROR) {
11707                         iocb->cmd_cmpl = iocb->fabric_cmd_cmpl;
11708                         iocb->fabric_cmd_cmpl = NULL;
11709                         iocb->cmd_flag &= ~LPFC_IO_FABRIC;
11710                         set_job_ulpstatus(iocb, IOSTAT_LOCAL_REJECT);
11711                         iocb->wcqe_cmpl.parameter = IOERR_SLI_ABORTED;
11712                         iocb->cmd_cmpl(phba, iocb, iocb);
11713
11714                         atomic_dec(&phba->fabric_iocb_count);
11715                         goto repeat;
11716                 }
11717         }
11718 }
11719
11720 /**
11721  * lpfc_unblock_fabric_iocbs - Unblock issuing fabric iocb command
11722  * @phba: pointer to lpfc hba data structure.
11723  *
11724  * This routine unblocks the  issuing fabric iocb command. The function
11725  * will clear the fabric iocb block bit and then invoke the routine
11726  * lpfc_resume_fabric_iocbs() to issue one of the pending fabric iocb
11727  * from the driver internal fabric iocb list.
11728  **/
11729 void
11730 lpfc_unblock_fabric_iocbs(struct lpfc_hba *phba)
11731 {
11732         clear_bit(FABRIC_COMANDS_BLOCKED, &phba->bit_flags);
11733
11734         lpfc_resume_fabric_iocbs(phba);
11735         return;
11736 }
11737
11738 /**
11739  * lpfc_block_fabric_iocbs - Block issuing fabric iocb command
11740  * @phba: pointer to lpfc hba data structure.
11741  *
11742  * This routine blocks the issuing fabric iocb for a specified amount of
11743  * time (currently 100 ms). This is done by set the fabric iocb block bit
11744  * and set up a timeout timer for 100ms. When the block bit is set, no more
11745  * fabric iocb will be issued out of the HBA.
11746  **/
11747 static void
11748 lpfc_block_fabric_iocbs(struct lpfc_hba *phba)
11749 {
11750         int blocked;
11751
11752         blocked = test_and_set_bit(FABRIC_COMANDS_BLOCKED, &phba->bit_flags);
11753         /* Start a timer to unblock fabric iocbs after 100ms */
11754         if (!blocked)
11755                 mod_timer(&phba->fabric_block_timer,
11756                           jiffies + msecs_to_jiffies(100));
11757
11758         return;
11759 }
11760
11761 /**
11762  * lpfc_cmpl_fabric_iocb - Completion callback function for fabric iocb
11763  * @phba: pointer to lpfc hba data structure.
11764  * @cmdiocb: pointer to lpfc command iocb data structure.
11765  * @rspiocb: pointer to lpfc response iocb data structure.
11766  *
11767  * This routine is the callback function that is put to the fabric iocb's
11768  * callback function pointer (iocb->cmd_cmpl). The original iocb's callback
11769  * function pointer has been stored in iocb->fabric_cmd_cmpl. This callback
11770  * function first restores and invokes the original iocb's callback function
11771  * and then invokes the lpfc_resume_fabric_iocbs() routine to issue the next
11772  * fabric bound iocb from the driver internal fabric iocb list onto the wire.
11773  **/
11774 static void
11775 lpfc_cmpl_fabric_iocb(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
11776                       struct lpfc_iocbq *rspiocb)
11777 {
11778         struct ls_rjt stat;
11779         u32 ulp_status = get_job_ulpstatus(phba, rspiocb);
11780         u32 ulp_word4 = get_job_word4(phba, rspiocb);
11781
11782         WARN_ON((cmdiocb->cmd_flag & LPFC_IO_FABRIC) != LPFC_IO_FABRIC);
11783
11784         switch (ulp_status) {
11785                 case IOSTAT_NPORT_RJT:
11786                 case IOSTAT_FABRIC_RJT:
11787                         if (ulp_word4 & RJT_UNAVAIL_TEMP)
11788                                 lpfc_block_fabric_iocbs(phba);
11789                         break;
11790
11791                 case IOSTAT_NPORT_BSY:
11792                 case IOSTAT_FABRIC_BSY:
11793                         lpfc_block_fabric_iocbs(phba);
11794                         break;
11795
11796                 case IOSTAT_LS_RJT:
11797                         stat.un.ls_rjt_error_be =
11798                                 cpu_to_be32(ulp_word4);
11799                         if ((stat.un.b.lsRjtRsnCode == LSRJT_UNABLE_TPC) ||
11800                                 (stat.un.b.lsRjtRsnCode == LSRJT_LOGICAL_BSY))
11801                                 lpfc_block_fabric_iocbs(phba);
11802                         break;
11803         }
11804
11805         BUG_ON(atomic_read(&phba->fabric_iocb_count) == 0);
11806
11807         cmdiocb->cmd_cmpl = cmdiocb->fabric_cmd_cmpl;
11808         cmdiocb->fabric_cmd_cmpl = NULL;
11809         cmdiocb->cmd_flag &= ~LPFC_IO_FABRIC;
11810         cmdiocb->cmd_cmpl(phba, cmdiocb, rspiocb);
11811
11812         atomic_dec(&phba->fabric_iocb_count);
11813         if (!test_bit(FABRIC_COMANDS_BLOCKED, &phba->bit_flags)) {
11814                 /* Post any pending iocbs to HBA */
11815                 lpfc_resume_fabric_iocbs(phba);
11816         }
11817 }
11818
11819 /**
11820  * lpfc_issue_fabric_iocb - Issue a fabric iocb command
11821  * @phba: pointer to lpfc hba data structure.
11822  * @iocb: pointer to lpfc command iocb data structure.
11823  *
11824  * This routine is used as the top-level API for issuing a fabric iocb command
11825  * such as FLOGI and FDISC. To accommodate certain switch fabric, this driver
11826  * function makes sure that only one fabric bound iocb will be outstanding at
11827  * any given time. As such, this function will first check to see whether there
11828  * is already an outstanding fabric iocb on the wire. If so, it will put the
11829  * newly issued iocb onto the driver internal fabric iocb list, waiting to be
11830  * issued later. Otherwise, it will issue the iocb on the wire and update the
11831  * fabric iocb count it indicate that there is one fabric iocb on the wire.
11832  *
11833  * Note, this implementation has a potential sending out fabric IOCBs out of
11834  * order. The problem is caused by the construction of the "ready" boolen does
11835  * not include the condition that the internal fabric IOCB list is empty. As
11836  * such, it is possible a fabric IOCB issued by this routine might be "jump"
11837  * ahead of the fabric IOCBs in the internal list.
11838  *
11839  * Return code
11840  *   IOCB_SUCCESS - either fabric iocb put on the list or issued successfully
11841  *   IOCB_ERROR - failed to issue fabric iocb
11842  **/
11843 static int
11844 lpfc_issue_fabric_iocb(struct lpfc_hba *phba, struct lpfc_iocbq *iocb)
11845 {
11846         unsigned long iflags;
11847         int ready;
11848         int ret;
11849
11850         BUG_ON(atomic_read(&phba->fabric_iocb_count) > 1);
11851
11852         spin_lock_irqsave(&phba->hbalock, iflags);
11853         ready = atomic_read(&phba->fabric_iocb_count) == 0 &&
11854                 !test_bit(FABRIC_COMANDS_BLOCKED, &phba->bit_flags);
11855
11856         if (ready)
11857                 /* Increment fabric iocb count to hold the position */
11858                 atomic_inc(&phba->fabric_iocb_count);
11859         spin_unlock_irqrestore(&phba->hbalock, iflags);
11860         if (ready) {
11861                 iocb->fabric_cmd_cmpl = iocb->cmd_cmpl;
11862                 iocb->cmd_cmpl = lpfc_cmpl_fabric_iocb;
11863                 iocb->cmd_flag |= LPFC_IO_FABRIC;
11864
11865                 lpfc_debugfs_disc_trc(iocb->vport, LPFC_DISC_TRC_ELS_CMD,
11866                                       "Fabric sched2:   ste:x%x",
11867                                       iocb->vport->port_state, 0, 0);
11868
11869                 ret = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, iocb, 0);
11870
11871                 if (ret == IOCB_ERROR) {
11872                         iocb->cmd_cmpl = iocb->fabric_cmd_cmpl;
11873                         iocb->fabric_cmd_cmpl = NULL;
11874                         iocb->cmd_flag &= ~LPFC_IO_FABRIC;
11875                         atomic_dec(&phba->fabric_iocb_count);
11876                 }
11877         } else {
11878                 spin_lock_irqsave(&phba->hbalock, iflags);
11879                 list_add_tail(&iocb->list, &phba->fabric_iocb_list);
11880                 spin_unlock_irqrestore(&phba->hbalock, iflags);
11881                 ret = IOCB_SUCCESS;
11882         }
11883         return ret;
11884 }
11885
11886 /**
11887  * lpfc_fabric_abort_vport - Abort a vport's iocbs from driver fabric iocb list
11888  * @vport: pointer to a virtual N_Port data structure.
11889  *
11890  * This routine aborts all the IOCBs associated with a @vport from the
11891  * driver internal fabric IOCB list. The list contains fabric IOCBs to be
11892  * issued to the ELS IOCB ring. This abort function walks the fabric IOCB
11893  * list, removes each IOCB associated with the @vport off the list, set the
11894  * status field to IOSTAT_LOCAL_REJECT, and invokes the callback function
11895  * associated with the IOCB.
11896  **/
11897 static void lpfc_fabric_abort_vport(struct lpfc_vport *vport)
11898 {
11899         LIST_HEAD(completions);
11900         struct lpfc_hba  *phba = vport->phba;
11901         struct lpfc_iocbq *tmp_iocb, *piocb;
11902
11903         spin_lock_irq(&phba->hbalock);
11904         list_for_each_entry_safe(piocb, tmp_iocb, &phba->fabric_iocb_list,
11905                                  list) {
11906
11907                 if (piocb->vport != vport)
11908                         continue;
11909
11910                 list_move_tail(&piocb->list, &completions);
11911         }
11912         spin_unlock_irq(&phba->hbalock);
11913
11914         /* Cancel all the IOCBs from the completions list */
11915         lpfc_sli_cancel_iocbs(phba, &completions, IOSTAT_LOCAL_REJECT,
11916                               IOERR_SLI_ABORTED);
11917 }
11918
11919 /**
11920  * lpfc_fabric_abort_nport - Abort a ndlp's iocbs from driver fabric iocb list
11921  * @ndlp: pointer to a node-list data structure.
11922  *
11923  * This routine aborts all the IOCBs associated with an @ndlp from the
11924  * driver internal fabric IOCB list. The list contains fabric IOCBs to be
11925  * issued to the ELS IOCB ring. This abort function walks the fabric IOCB
11926  * list, removes each IOCB associated with the @ndlp off the list, set the
11927  * status field to IOSTAT_LOCAL_REJECT, and invokes the callback function
11928  * associated with the IOCB.
11929  **/
11930 void lpfc_fabric_abort_nport(struct lpfc_nodelist *ndlp)
11931 {
11932         LIST_HEAD(completions);
11933         struct lpfc_hba  *phba = ndlp->phba;
11934         struct lpfc_iocbq *tmp_iocb, *piocb;
11935         struct lpfc_sli_ring *pring;
11936
11937         pring = lpfc_phba_elsring(phba);
11938
11939         if (unlikely(!pring))
11940                 return;
11941
11942         spin_lock_irq(&phba->hbalock);
11943         list_for_each_entry_safe(piocb, tmp_iocb, &phba->fabric_iocb_list,
11944                                  list) {
11945                 if ((lpfc_check_sli_ndlp(phba, pring, piocb, ndlp))) {
11946
11947                         list_move_tail(&piocb->list, &completions);
11948                 }
11949         }
11950         spin_unlock_irq(&phba->hbalock);
11951
11952         /* Cancel all the IOCBs from the completions list */
11953         lpfc_sli_cancel_iocbs(phba, &completions, IOSTAT_LOCAL_REJECT,
11954                               IOERR_SLI_ABORTED);
11955 }
11956
11957 /**
11958  * lpfc_fabric_abort_hba - Abort all iocbs on driver fabric iocb list
11959  * @phba: pointer to lpfc hba data structure.
11960  *
11961  * This routine aborts all the IOCBs currently on the driver internal
11962  * fabric IOCB list. The list contains fabric IOCBs to be issued to the ELS
11963  * IOCB ring. This function takes the entire IOCB list off the fabric IOCB
11964  * list, removes IOCBs off the list, set the status field to
11965  * IOSTAT_LOCAL_REJECT, and invokes the callback function associated with
11966  * the IOCB.
11967  **/
11968 void lpfc_fabric_abort_hba(struct lpfc_hba *phba)
11969 {
11970         LIST_HEAD(completions);
11971
11972         spin_lock_irq(&phba->hbalock);
11973         list_splice_init(&phba->fabric_iocb_list, &completions);
11974         spin_unlock_irq(&phba->hbalock);
11975
11976         /* Cancel all the IOCBs from the completions list */
11977         lpfc_sli_cancel_iocbs(phba, &completions, IOSTAT_LOCAL_REJECT,
11978                               IOERR_SLI_ABORTED);
11979 }
11980
11981 /**
11982  * lpfc_sli4_vport_delete_els_xri_aborted -Remove all ndlp references for vport
11983  * @vport: pointer to lpfc vport data structure.
11984  *
11985  * This routine is invoked by the vport cleanup for deletions and the cleanup
11986  * for an ndlp on removal.
11987  **/
11988 void
11989 lpfc_sli4_vport_delete_els_xri_aborted(struct lpfc_vport *vport)
11990 {
11991         struct lpfc_hba *phba = vport->phba;
11992         struct lpfc_sglq *sglq_entry = NULL, *sglq_next = NULL;
11993         struct lpfc_nodelist *ndlp = NULL;
11994         unsigned long iflag = 0;
11995
11996         spin_lock_irqsave(&phba->sli4_hba.sgl_list_lock, iflag);
11997         list_for_each_entry_safe(sglq_entry, sglq_next,
11998                         &phba->sli4_hba.lpfc_abts_els_sgl_list, list) {
11999                 if (sglq_entry->ndlp && sglq_entry->ndlp->vport == vport) {
12000                         lpfc_nlp_put(sglq_entry->ndlp);
12001                         ndlp = sglq_entry->ndlp;
12002                         sglq_entry->ndlp = NULL;
12003
12004                         /* If the xri on the abts_els_sgl list is for the Fport
12005                          * node and the vport is unloading, the xri aborted wcqe
12006                          * likely isn't coming back.  Just release the sgl.
12007                          */
12008                         if ((vport->load_flag & FC_UNLOADING) &&
12009                             ndlp->nlp_DID == Fabric_DID) {
12010                                 list_del(&sglq_entry->list);
12011                                 sglq_entry->state = SGL_FREED;
12012                                 list_add_tail(&sglq_entry->list,
12013                                         &phba->sli4_hba.lpfc_els_sgl_list);
12014                         }
12015                 }
12016         }
12017         spin_unlock_irqrestore(&phba->sli4_hba.sgl_list_lock, iflag);
12018         return;
12019 }
12020
12021 /**
12022  * lpfc_sli4_els_xri_aborted - Slow-path process of els xri abort
12023  * @phba: pointer to lpfc hba data structure.
12024  * @axri: pointer to the els xri abort wcqe structure.
12025  *
12026  * This routine is invoked by the worker thread to process a SLI4 slow-path
12027  * ELS aborted xri.
12028  **/
12029 void
12030 lpfc_sli4_els_xri_aborted(struct lpfc_hba *phba,
12031                           struct sli4_wcqe_xri_aborted *axri)
12032 {
12033         uint16_t xri = bf_get(lpfc_wcqe_xa_xri, axri);
12034         uint16_t rxid = bf_get(lpfc_wcqe_xa_remote_xid, axri);
12035         uint16_t lxri = 0;
12036
12037         struct lpfc_sglq *sglq_entry = NULL, *sglq_next = NULL;
12038         unsigned long iflag = 0;
12039         struct lpfc_nodelist *ndlp;
12040         struct lpfc_sli_ring *pring;
12041
12042         pring = lpfc_phba_elsring(phba);
12043
12044         spin_lock_irqsave(&phba->sli4_hba.sgl_list_lock, iflag);
12045         list_for_each_entry_safe(sglq_entry, sglq_next,
12046                         &phba->sli4_hba.lpfc_abts_els_sgl_list, list) {
12047                 if (sglq_entry->sli4_xritag == xri) {
12048                         list_del(&sglq_entry->list);
12049                         ndlp = sglq_entry->ndlp;
12050                         sglq_entry->ndlp = NULL;
12051                         list_add_tail(&sglq_entry->list,
12052                                 &phba->sli4_hba.lpfc_els_sgl_list);
12053                         sglq_entry->state = SGL_FREED;
12054                         spin_unlock_irqrestore(&phba->sli4_hba.sgl_list_lock,
12055                                                iflag);
12056
12057                         if (ndlp) {
12058                                 lpfc_set_rrq_active(phba, ndlp,
12059                                         sglq_entry->sli4_lxritag,
12060                                         rxid, 1);
12061                                 lpfc_nlp_put(ndlp);
12062                         }
12063
12064                         /* Check if TXQ queue needs to be serviced */
12065                         if (pring && !list_empty(&pring->txq))
12066                                 lpfc_worker_wake_up(phba);
12067                         return;
12068                 }
12069         }
12070         spin_unlock_irqrestore(&phba->sli4_hba.sgl_list_lock, iflag);
12071         lxri = lpfc_sli4_xri_inrange(phba, xri);
12072         if (lxri == NO_XRI)
12073                 return;
12074
12075         spin_lock_irqsave(&phba->hbalock, iflag);
12076         sglq_entry = __lpfc_get_active_sglq(phba, lxri);
12077         if (!sglq_entry || (sglq_entry->sli4_xritag != xri)) {
12078                 spin_unlock_irqrestore(&phba->hbalock, iflag);
12079                 return;
12080         }
12081         sglq_entry->state = SGL_XRI_ABORTED;
12082         spin_unlock_irqrestore(&phba->hbalock, iflag);
12083         return;
12084 }
12085
12086 /* lpfc_sli_abts_recover_port - Recover a port that failed a BLS_ABORT req.
12087  * @vport: pointer to virtual port object.
12088  * @ndlp: nodelist pointer for the impacted node.
12089  *
12090  * The driver calls this routine in response to an SLI4 XRI ABORT CQE
12091  * or an SLI3 ASYNC_STATUS_CN event from the port.  For either event,
12092  * the driver is required to send a LOGO to the remote node before it
12093  * attempts to recover its login to the remote node.
12094  */
12095 void
12096 lpfc_sli_abts_recover_port(struct lpfc_vport *vport,
12097                            struct lpfc_nodelist *ndlp)
12098 {
12099         struct Scsi_Host *shost;
12100         struct lpfc_hba *phba;
12101         unsigned long flags = 0;
12102
12103         shost = lpfc_shost_from_vport(vport);
12104         phba = vport->phba;
12105         if (ndlp->nlp_state != NLP_STE_MAPPED_NODE) {
12106                 lpfc_printf_log(phba, KERN_INFO,
12107                                 LOG_SLI, "3093 No rport recovery needed. "
12108                                 "rport in state 0x%x\n", ndlp->nlp_state);
12109                 return;
12110         }
12111         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
12112                         "3094 Start rport recovery on shost id 0x%x "
12113                         "fc_id 0x%06x vpi 0x%x rpi 0x%x state 0x%x "
12114                         "flags 0x%x\n",
12115                         shost->host_no, ndlp->nlp_DID,
12116                         vport->vpi, ndlp->nlp_rpi, ndlp->nlp_state,
12117                         ndlp->nlp_flag);
12118         /*
12119          * The rport is not responding.  Remove the FCP-2 flag to prevent
12120          * an ADISC in the follow-up recovery code.
12121          */
12122         spin_lock_irqsave(&ndlp->lock, flags);
12123         ndlp->nlp_fcp_info &= ~NLP_FCP_2_DEVICE;
12124         ndlp->nlp_flag |= NLP_ISSUE_LOGO;
12125         spin_unlock_irqrestore(&ndlp->lock, flags);
12126         lpfc_unreg_rpi(vport, ndlp);
12127 }
12128
12129 static void lpfc_init_cs_ctl_bitmap(struct lpfc_vport *vport)
12130 {
12131         bitmap_zero(vport->vmid_priority_range, LPFC_VMID_MAX_PRIORITY_RANGE);
12132 }
12133
12134 static void
12135 lpfc_vmid_set_cs_ctl_range(struct lpfc_vport *vport, u32 min, u32 max)
12136 {
12137         u32 i;
12138
12139         if ((min > max) || (max > LPFC_VMID_MAX_PRIORITY_RANGE))
12140                 return;
12141
12142         for (i = min; i <= max; i++)
12143                 set_bit(i, vport->vmid_priority_range);
12144 }
12145
12146 static void lpfc_vmid_put_cs_ctl(struct lpfc_vport *vport, u32 ctcl_vmid)
12147 {
12148         set_bit(ctcl_vmid, vport->vmid_priority_range);
12149 }
12150
12151 u32 lpfc_vmid_get_cs_ctl(struct lpfc_vport *vport)
12152 {
12153         u32 i;
12154
12155         i = find_first_bit(vport->vmid_priority_range,
12156                            LPFC_VMID_MAX_PRIORITY_RANGE);
12157
12158         if (i == LPFC_VMID_MAX_PRIORITY_RANGE)
12159                 return 0;
12160
12161         clear_bit(i, vport->vmid_priority_range);
12162         return i;
12163 }
12164
12165 #define MAX_PRIORITY_DESC       255
12166
12167 static void
12168 lpfc_cmpl_els_qfpa(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
12169                    struct lpfc_iocbq *rspiocb)
12170 {
12171         struct lpfc_vport *vport = cmdiocb->vport;
12172         struct priority_range_desc *desc;
12173         struct lpfc_dmabuf *prsp = NULL;
12174         struct lpfc_vmid_priority_range *vmid_range = NULL;
12175         u32 *data;
12176         struct lpfc_dmabuf *dmabuf = cmdiocb->cmd_dmabuf;
12177         u32 ulp_status = get_job_ulpstatus(phba, rspiocb);
12178         u32 ulp_word4 = get_job_word4(phba, rspiocb);
12179         u8 *pcmd, max_desc;
12180         u32 len, i;
12181         struct lpfc_nodelist *ndlp = cmdiocb->ndlp;
12182
12183         prsp = list_get_first(&dmabuf->list, struct lpfc_dmabuf, list);
12184         if (!prsp)
12185                 goto out;
12186
12187         pcmd = prsp->virt;
12188         data = (u32 *)pcmd;
12189         if (data[0] == ELS_CMD_LS_RJT) {
12190                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_SLI,
12191                                  "3277 QFPA LS_RJT x%x  x%x\n",
12192                                  data[0], data[1]);
12193                 goto out;
12194         }
12195         if (ulp_status) {
12196                 lpfc_printf_vlog(vport, KERN_ERR, LOG_SLI,
12197                                  "6529 QFPA failed with status x%x  x%x\n",
12198                                  ulp_status, ulp_word4);
12199                 goto out;
12200         }
12201
12202         if (!vport->qfpa_res) {
12203                 max_desc = FCELSSIZE / sizeof(*vport->qfpa_res);
12204                 vport->qfpa_res = kcalloc(max_desc, sizeof(*vport->qfpa_res),
12205                                           GFP_KERNEL);
12206                 if (!vport->qfpa_res)
12207                         goto out;
12208         }
12209
12210         len = *((u32 *)(pcmd + 4));
12211         len = be32_to_cpu(len);
12212         memcpy(vport->qfpa_res, pcmd, len + 8);
12213         len = len / LPFC_PRIORITY_RANGE_DESC_SIZE;
12214
12215         desc = (struct priority_range_desc *)(pcmd + 8);
12216         vmid_range = vport->vmid_priority.vmid_range;
12217         if (!vmid_range) {
12218                 vmid_range = kcalloc(MAX_PRIORITY_DESC, sizeof(*vmid_range),
12219                                      GFP_KERNEL);
12220                 if (!vmid_range) {
12221                         kfree(vport->qfpa_res);
12222                         goto out;
12223                 }
12224                 vport->vmid_priority.vmid_range = vmid_range;
12225         }
12226         vport->vmid_priority.num_descriptors = len;
12227
12228         for (i = 0; i < len; i++, vmid_range++, desc++) {
12229                 lpfc_printf_vlog(vport, KERN_DEBUG, LOG_ELS,
12230                                  "6539 vmid values low=%d, high=%d, qos=%d, "
12231                                  "local ve id=%d\n", desc->lo_range,
12232                                  desc->hi_range, desc->qos_priority,
12233                                  desc->local_ve_id);
12234
12235                 vmid_range->low = desc->lo_range << 1;
12236                 if (desc->local_ve_id == QFPA_ODD_ONLY)
12237                         vmid_range->low++;
12238                 if (desc->qos_priority)
12239                         vport->vmid_flag |= LPFC_VMID_QOS_ENABLED;
12240                 vmid_range->qos = desc->qos_priority;
12241
12242                 vmid_range->high = desc->hi_range << 1;
12243                 if ((desc->local_ve_id == QFPA_ODD_ONLY) ||
12244                     (desc->local_ve_id == QFPA_EVEN_ODD))
12245                         vmid_range->high++;
12246         }
12247         lpfc_init_cs_ctl_bitmap(vport);
12248         for (i = 0; i < vport->vmid_priority.num_descriptors; i++) {
12249                 lpfc_vmid_set_cs_ctl_range(vport,
12250                                 vport->vmid_priority.vmid_range[i].low,
12251                                 vport->vmid_priority.vmid_range[i].high);
12252         }
12253
12254         vport->vmid_flag |= LPFC_VMID_QFPA_CMPL;
12255  out:
12256         lpfc_els_free_iocb(phba, cmdiocb);
12257         lpfc_nlp_put(ndlp);
12258 }
12259
12260 int lpfc_issue_els_qfpa(struct lpfc_vport *vport)
12261 {
12262         struct lpfc_hba *phba = vport->phba;
12263         struct lpfc_nodelist *ndlp;
12264         struct lpfc_iocbq *elsiocb;
12265         u8 *pcmd;
12266         int ret;
12267
12268         ndlp = lpfc_findnode_did(phba->pport, Fabric_DID);
12269         if (!ndlp || ndlp->nlp_state != NLP_STE_UNMAPPED_NODE)
12270                 return -ENXIO;
12271
12272         elsiocb = lpfc_prep_els_iocb(vport, 1, LPFC_QFPA_SIZE, 2, ndlp,
12273                                      ndlp->nlp_DID, ELS_CMD_QFPA);
12274         if (!elsiocb)
12275                 return -ENOMEM;
12276
12277         pcmd = (u8 *)elsiocb->cmd_dmabuf->virt;
12278
12279         *((u32 *)(pcmd)) = ELS_CMD_QFPA;
12280         pcmd += 4;
12281
12282         elsiocb->cmd_cmpl = lpfc_cmpl_els_qfpa;
12283
12284         elsiocb->ndlp = lpfc_nlp_get(ndlp);
12285         if (!elsiocb->ndlp) {
12286                 lpfc_els_free_iocb(vport->phba, elsiocb);
12287                 return -ENXIO;
12288         }
12289
12290         ret = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 2);
12291         if (ret != IOCB_SUCCESS) {
12292                 lpfc_els_free_iocb(phba, elsiocb);
12293                 lpfc_nlp_put(ndlp);
12294                 return -EIO;
12295         }
12296         vport->vmid_flag &= ~LPFC_VMID_QOS_ENABLED;
12297         return 0;
12298 }
12299
12300 int
12301 lpfc_vmid_uvem(struct lpfc_vport *vport,
12302                struct lpfc_vmid *vmid, bool instantiated)
12303 {
12304         struct lpfc_vem_id_desc *vem_id_desc;
12305         struct lpfc_nodelist *ndlp;
12306         struct lpfc_iocbq *elsiocb;
12307         struct instantiated_ve_desc *inst_desc;
12308         struct lpfc_vmid_context *vmid_context;
12309         u8 *pcmd;
12310         u32 *len;
12311         int ret = 0;
12312
12313         ndlp = lpfc_findnode_did(vport, Fabric_DID);
12314         if (!ndlp || ndlp->nlp_state != NLP_STE_UNMAPPED_NODE)
12315                 return -ENXIO;
12316
12317         vmid_context = kmalloc(sizeof(*vmid_context), GFP_KERNEL);
12318         if (!vmid_context)
12319                 return -ENOMEM;
12320         elsiocb = lpfc_prep_els_iocb(vport, 1, LPFC_UVEM_SIZE, 2,
12321                                      ndlp, Fabric_DID, ELS_CMD_UVEM);
12322         if (!elsiocb)
12323                 goto out;
12324
12325         lpfc_printf_vlog(vport, KERN_DEBUG, LOG_ELS,
12326                          "3427 Host vmid %s %d\n",
12327                          vmid->host_vmid, instantiated);
12328         vmid_context->vmp = vmid;
12329         vmid_context->nlp = ndlp;
12330         vmid_context->instantiated = instantiated;
12331         elsiocb->vmid_tag.vmid_context = vmid_context;
12332         pcmd = (u8 *)elsiocb->cmd_dmabuf->virt;
12333
12334         if (uuid_is_null((uuid_t *)vport->lpfc_vmid_host_uuid))
12335                 memcpy(vport->lpfc_vmid_host_uuid, vmid->host_vmid,
12336                        LPFC_COMPRESS_VMID_SIZE);
12337
12338         *((u32 *)(pcmd)) = ELS_CMD_UVEM;
12339         len = (u32 *)(pcmd + 4);
12340         *len = cpu_to_be32(LPFC_UVEM_SIZE - 8);
12341
12342         vem_id_desc = (struct lpfc_vem_id_desc *)(pcmd + 8);
12343         vem_id_desc->tag = be32_to_cpu(VEM_ID_DESC_TAG);
12344         vem_id_desc->length = be32_to_cpu(LPFC_UVEM_VEM_ID_DESC_SIZE);
12345         memcpy(vem_id_desc->vem_id, vport->lpfc_vmid_host_uuid,
12346                LPFC_COMPRESS_VMID_SIZE);
12347
12348         inst_desc = (struct instantiated_ve_desc *)(pcmd + 32);
12349         inst_desc->tag = be32_to_cpu(INSTANTIATED_VE_DESC_TAG);
12350         inst_desc->length = be32_to_cpu(LPFC_UVEM_VE_MAP_DESC_SIZE);
12351         memcpy(inst_desc->global_vem_id, vmid->host_vmid,
12352                LPFC_COMPRESS_VMID_SIZE);
12353
12354         bf_set(lpfc_instantiated_nport_id, inst_desc, vport->fc_myDID);
12355         bf_set(lpfc_instantiated_local_id, inst_desc,
12356                vmid->un.cs_ctl_vmid);
12357         if (instantiated) {
12358                 inst_desc->tag = be32_to_cpu(INSTANTIATED_VE_DESC_TAG);
12359         } else {
12360                 inst_desc->tag = be32_to_cpu(DEINSTANTIATED_VE_DESC_TAG);
12361                 lpfc_vmid_put_cs_ctl(vport, vmid->un.cs_ctl_vmid);
12362         }
12363         inst_desc->word6 = cpu_to_be32(inst_desc->word6);
12364
12365         elsiocb->cmd_cmpl = lpfc_cmpl_els_uvem;
12366
12367         elsiocb->ndlp = lpfc_nlp_get(ndlp);
12368         if (!elsiocb->ndlp) {
12369                 lpfc_els_free_iocb(vport->phba, elsiocb);
12370                 goto out;
12371         }
12372
12373         ret = lpfc_sli_issue_iocb(vport->phba, LPFC_ELS_RING, elsiocb, 0);
12374         if (ret != IOCB_SUCCESS) {
12375                 lpfc_els_free_iocb(vport->phba, elsiocb);
12376                 lpfc_nlp_put(ndlp);
12377                 goto out;
12378         }
12379
12380         return 0;
12381  out:
12382         kfree(vmid_context);
12383         return -EIO;
12384 }
12385
12386 static void
12387 lpfc_cmpl_els_uvem(struct lpfc_hba *phba, struct lpfc_iocbq *icmdiocb,
12388                    struct lpfc_iocbq *rspiocb)
12389 {
12390         struct lpfc_vport *vport = icmdiocb->vport;
12391         struct lpfc_dmabuf *prsp = NULL;
12392         struct lpfc_vmid_context *vmid_context =
12393             icmdiocb->vmid_tag.vmid_context;
12394         struct lpfc_nodelist *ndlp = icmdiocb->ndlp;
12395         u8 *pcmd;
12396         u32 *data;
12397         u32 ulp_status = get_job_ulpstatus(phba, rspiocb);
12398         u32 ulp_word4 = get_job_word4(phba, rspiocb);
12399         struct lpfc_dmabuf *dmabuf = icmdiocb->cmd_dmabuf;
12400         struct lpfc_vmid *vmid;
12401
12402         vmid = vmid_context->vmp;
12403         if (!ndlp || ndlp->nlp_state != NLP_STE_UNMAPPED_NODE)
12404                 ndlp = NULL;
12405
12406         prsp = list_get_first(&dmabuf->list, struct lpfc_dmabuf, list);
12407         if (!prsp)
12408                 goto out;
12409         pcmd = prsp->virt;
12410         data = (u32 *)pcmd;
12411         if (data[0] == ELS_CMD_LS_RJT) {
12412                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_SLI,
12413                                  "4532 UVEM LS_RJT %x %x\n", data[0], data[1]);
12414                 goto out;
12415         }
12416         if (ulp_status) {
12417                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_SLI,
12418                                  "4533 UVEM error status %x: %x\n",
12419                                  ulp_status, ulp_word4);
12420                 goto out;
12421         }
12422         spin_lock(&phba->hbalock);
12423         /* Set IN USE flag */
12424         vport->vmid_flag |= LPFC_VMID_IN_USE;
12425         phba->pport->vmid_flag |= LPFC_VMID_IN_USE;
12426         spin_unlock(&phba->hbalock);
12427
12428         if (vmid_context->instantiated) {
12429                 write_lock(&vport->vmid_lock);
12430                 vmid->flag |= LPFC_VMID_REGISTERED;
12431                 vmid->flag &= ~LPFC_VMID_REQ_REGISTER;
12432                 write_unlock(&vport->vmid_lock);
12433         }
12434
12435  out:
12436         kfree(vmid_context);
12437         lpfc_els_free_iocb(phba, icmdiocb);
12438         lpfc_nlp_put(ndlp);
12439 }