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