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) 2017-2021 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  * @expectRsp: flag indicating whether response is expected.
 138  * @cmdSize: size of the ELS command.
 139  * @retry: number of retries to the command IOCB 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  * context1 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, uint8_t expectRsp,
 164                    uint16_t cmdSize, uint8_t retry,
 165                    struct lpfc_nodelist *ndlp, uint32_t did,
 166                    uint32_t elscmd)
 167 {
 168         struct lpfc_hba  *phba = vport->phba;
 169         struct lpfc_iocbq *elsiocb;
 170         struct lpfc_dmabuf *pcmd, *prsp, *pbuflist;
 171         struct ulp_bde64 *bpl;
 172         IOCB_t *icmd;
 173
 174
 175         if (!lpfc_is_link_up(phba))
 176                 return NULL;
 177
 178         /* Allocate buffer for  command iocb */
 179         elsiocb = lpfc_sli_get_iocbq(phba);
 180
 181         if (elsiocb == NULL)
 182                 return NULL;
 183
 184         /*
 185          * If this command is for fabric controller and HBA running
 186          * in FIP mode send FLOGI, FDISC and LOGO as FIP frames.
 187          */
 188         if ((did == Fabric_DID) &&
 189                 (phba->hba_flag & HBA_FIP_SUPPORT) &&
 190                 ((elscmd == ELS_CMD_FLOGI) ||
 191                  (elscmd == ELS_CMD_FDISC) ||
 192                  (elscmd == ELS_CMD_LOGO)))
 193                 switch (elscmd) {
 194                 case ELS_CMD_FLOGI:
 195                 elsiocb->iocb_flag |=
 196                         ((LPFC_ELS_ID_FLOGI << LPFC_FIP_ELS_ID_SHIFT)
 197                                         & LPFC_FIP_ELS_ID_MASK);
 198                 break;
 199                 case ELS_CMD_FDISC:
 200                 elsiocb->iocb_flag |=
 201                         ((LPFC_ELS_ID_FDISC << LPFC_FIP_ELS_ID_SHIFT)
 202                                         & LPFC_FIP_ELS_ID_MASK);
 203                 break;
 204                 case ELS_CMD_LOGO:
 205                 elsiocb->iocb_flag |=
 206                         ((LPFC_ELS_ID_LOGO << LPFC_FIP_ELS_ID_SHIFT)
 207                                         & LPFC_FIP_ELS_ID_MASK);
 208                 break;
 209                 }
 210         else
 211                 elsiocb->iocb_flag &= ~LPFC_FIP_ELS_ID_MASK;
 212
 213         icmd = &elsiocb->iocb;
 214
 215         /* fill in BDEs for command */
 216         /* Allocate buffer for command payload */
 217         pcmd = kmalloc(sizeof(struct lpfc_dmabuf), GFP_KERNEL);
 218         if (pcmd)
 219                 pcmd->virt = lpfc_mbuf_alloc(phba, MEM_PRI, &pcmd->phys);
 220         if (!pcmd || !pcmd->virt)
 221                 goto els_iocb_free_pcmb_exit;
 222
 223         INIT_LIST_HEAD(&pcmd->list);
 224
 225         /* Allocate buffer for response payload */
 226         if (expectRsp) {
 227                 prsp = kmalloc(sizeof(struct lpfc_dmabuf), GFP_KERNEL);
 228                 if (prsp)
 229                         prsp->virt = lpfc_mbuf_alloc(phba, MEM_PRI,
 230                                                      &prsp->phys);
 231                 if (!prsp || !prsp->virt)
 232                         goto els_iocb_free_prsp_exit;
 233                 INIT_LIST_HEAD(&prsp->list);
 234         } else
 235                 prsp = NULL;
 236
 237         /* Allocate buffer for Buffer ptr list */
 238         pbuflist = kmalloc(sizeof(struct lpfc_dmabuf), GFP_KERNEL);
 239         if (pbuflist)
 240                 pbuflist->virt = lpfc_mbuf_alloc(phba, MEM_PRI,
 241                                                  &pbuflist->phys);
 242         if (!pbuflist || !pbuflist->virt)
 243                 goto els_iocb_free_pbuf_exit;
 244
 245         INIT_LIST_HEAD(&pbuflist->list);
 246
 247         if (expectRsp) {
 248                 icmd->un.elsreq64.bdl.addrHigh = putPaddrHigh(pbuflist->phys);
 249                 icmd->un.elsreq64.bdl.addrLow = putPaddrLow(pbuflist->phys);
 250                 icmd->un.elsreq64.bdl.bdeFlags = BUFF_TYPE_BLP_64;
 251                 icmd->un.elsreq64.bdl.bdeSize = (2 * sizeof(struct ulp_bde64));
 252
 253                 icmd->un.elsreq64.remoteID = did;               /* DID */
 254                 icmd->ulpCommand = CMD_ELS_REQUEST64_CR;
 255                 if (elscmd == ELS_CMD_FLOGI)
 256                         icmd->ulpTimeout = FF_DEF_RATOV * 2;
 257                 else if (elscmd == ELS_CMD_LOGO)
 258                         icmd->ulpTimeout = phba->fc_ratov;
 259                 else
 260                         icmd->ulpTimeout = phba->fc_ratov * 2;
 261         } else {
 262                 icmd->un.xseq64.bdl.addrHigh = putPaddrHigh(pbuflist->phys);
 263                 icmd->un.xseq64.bdl.addrLow = putPaddrLow(pbuflist->phys);
 264                 icmd->un.xseq64.bdl.bdeFlags = BUFF_TYPE_BLP_64;
 265                 icmd->un.xseq64.bdl.bdeSize = sizeof(struct ulp_bde64);
 266                 icmd->un.xseq64.xmit_els_remoteID = did;        /* DID */
 267                 icmd->ulpCommand = CMD_XMIT_ELS_RSP64_CX;
 268         }
 269         icmd->ulpBdeCount = 1;
 270         icmd->ulpLe = 1;
 271         icmd->ulpClass = CLASS3;
 272
 273         /*
 274          * If we have NPIV enabled, we want to send ELS traffic by VPI.
 275          * For SLI4, since the driver controls VPIs we also want to include
 276          * all ELS pt2pt protocol traffic as well.
 277          */
 278         if ((phba->sli3_options & LPFC_SLI3_NPIV_ENABLED) ||
 279                 ((phba->sli_rev == LPFC_SLI_REV4) &&
 280                     (vport->fc_flag & FC_PT2PT))) {
 281
 282                 if (expectRsp) {
 283                         icmd->un.elsreq64.myID = vport->fc_myDID;
 284
 285                         /* For ELS_REQUEST64_CR, use the VPI by default */
 286                         icmd->ulpContext = phba->vpi_ids[vport->vpi];
 287                 }
 288
 289                 icmd->ulpCt_h = 0;
 290                 /* The CT field must be 0=INVALID_RPI for the ECHO cmd */
 291                 if (elscmd == ELS_CMD_ECHO)
 292                         icmd->ulpCt_l = 0; /* context = invalid RPI */
 293                 else
 294                         icmd->ulpCt_l = 1; /* context = VPI */
 295         }
 296
 297         bpl = (struct ulp_bde64 *) pbuflist->virt;
 298         bpl->addrLow = le32_to_cpu(putPaddrLow(pcmd->phys));
 299         bpl->addrHigh = le32_to_cpu(putPaddrHigh(pcmd->phys));
 300         bpl->tus.f.bdeSize = cmdSize;
 301         bpl->tus.f.bdeFlags = 0;
 302         bpl->tus.w = le32_to_cpu(bpl->tus.w);
 303
 304         if (expectRsp) {
 305                 bpl++;
 306                 bpl->addrLow = le32_to_cpu(putPaddrLow(prsp->phys));
 307                 bpl->addrHigh = le32_to_cpu(putPaddrHigh(prsp->phys));
 308                 bpl->tus.f.bdeSize = FCELSSIZE;
 309                 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
 310                 bpl->tus.w = le32_to_cpu(bpl->tus.w);
 311         }
 312
 313         elsiocb->context2 = pcmd;
 314         elsiocb->context3 = pbuflist;
 315         elsiocb->retry = retry;
 316         elsiocb->vport = vport;
 317         elsiocb->drvrTimeout = (phba->fc_ratov << 1) + LPFC_DRVR_TIMEOUT;
 318
 319         if (prsp) {
 320                 list_add(&prsp->list, &pcmd->list);
 321         }
 322         if (expectRsp) {
 323                 /* Xmit ELS command <elsCmd> to remote NPORT <did> */
 324                 lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
 325                                  "0116 Xmit ELS command x%x to remote "
 326                                  "NPORT x%x I/O tag: x%x, port state:x%x "
 327                                  "rpi x%x fc_flag:x%x nlp_flag:x%x vport:x%p\n",
 328                                  elscmd, did, elsiocb->iotag,
 329                                  vport->port_state, ndlp->nlp_rpi,
 330                                  vport->fc_flag, ndlp->nlp_flag, vport);
 331         } else {
 332                 /* Xmit ELS response <elsCmd> to remote NPORT <did> */
 333                 lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
 334                                  "0117 Xmit ELS response x%x to remote "
 335                                  "NPORT x%x I/O tag: x%x, size: x%x "
 336                                  "port_state x%x  rpi x%x fc_flag x%x\n",
 337                                  elscmd, ndlp->nlp_DID, elsiocb->iotag,
 338                                  cmdSize, vport->port_state,
 339                                  ndlp->nlp_rpi, vport->fc_flag);
 340         }
 341         return elsiocb;
 342
 343 els_iocb_free_pbuf_exit:
 344         if (expectRsp)
 345                 lpfc_mbuf_free(phba, prsp->virt, prsp->phys);
 346         kfree(pbuflist);
 347
 348 els_iocb_free_prsp_exit:
 349         lpfc_mbuf_free(phba, pcmd->virt, pcmd->phys);
 350         kfree(prsp);
 351
 352 els_iocb_free_pcmb_exit:
 353         kfree(pcmd);
 354         lpfc_sli_release_iocbq(phba, elsiocb);
 355         return NULL;
 356 }
 357
 358 /**
 359  * lpfc_issue_fabric_reglogin - Issue fabric registration login for a vport
 360  * @vport: pointer to a host virtual N_Port data structure.
 361  *
 362  * This routine issues a fabric registration login for a @vport. An
 363  * active ndlp node with Fabric_DID must already exist for this @vport.
 364  * The routine invokes two mailbox commands to carry out fabric registration
 365  * login through the HBA firmware: the first mailbox command requests the
 366  * HBA to perform link configuration for the @vport; and the second mailbox
 367  * command requests the HBA to perform the actual fabric registration login
 368  * with the @vport.
 369  *
 370  * Return code
 371  *   0 - successfully issued fabric registration login for @vport
 372  *   -ENXIO -- failed to issue fabric registration login for @vport
 373  **/
 374 int
 375 lpfc_issue_fabric_reglogin(struct lpfc_vport *vport)
 376 {
 377         struct lpfc_hba  *phba = vport->phba;
 378         LPFC_MBOXQ_t *mbox;
 379         struct lpfc_dmabuf *mp;
 380         struct lpfc_nodelist *ndlp;
 381         struct serv_parm *sp;
 382         int rc;
 383         int err = 0;
 384
 385         sp = &phba->fc_fabparam;
 386         ndlp = lpfc_findnode_did(vport, Fabric_DID);
 387         if (!ndlp) {
 388                 err = 1;
 389                 goto fail;
 390         }
 391
 392         mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
 393         if (!mbox) {
 394                 err = 2;
 395                 goto fail;
 396         }
 397
 398         vport->port_state = LPFC_FABRIC_CFG_LINK;
 399         lpfc_config_link(phba, mbox);
 400         mbox->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
 401         mbox->vport = vport;
 402
 403         rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
 404         if (rc == MBX_NOT_FINISHED) {
 405                 err = 3;
 406                 goto fail_free_mbox;
 407         }
 408
 409         mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
 410         if (!mbox) {
 411                 err = 4;
 412                 goto fail;
 413         }
 414         rc = lpfc_reg_rpi(phba, vport->vpi, Fabric_DID, (uint8_t *)sp, mbox,
 415                           ndlp->nlp_rpi);
 416         if (rc) {
 417                 err = 5;
 418                 goto fail_free_mbox;
 419         }
 420
 421         mbox->mbox_cmpl = lpfc_mbx_cmpl_fabric_reg_login;
 422         mbox->vport = vport;
 423         /* increment the reference count on ndlp to hold reference
 424          * for the callback routine.
 425          */
 426         mbox->ctx_ndlp = lpfc_nlp_get(ndlp);
 427         if (!mbox->ctx_ndlp) {
 428                 err = 6;
 429                 goto fail_no_ndlp;
 430         }
 431
 432         rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
 433         if (rc == MBX_NOT_FINISHED) {
 434                 err = 7;
 435                 goto fail_issue_reg_login;
 436         }
 437
 438         return 0;
 439
 440 fail_issue_reg_login:
 441         /* decrement the reference count on ndlp just incremented
 442          * for the failed mbox command.
 443          */
 444         lpfc_nlp_put(ndlp);
 445 fail_no_ndlp:
 446         mp = (struct lpfc_dmabuf *)mbox->ctx_buf;
 447         lpfc_mbuf_free(phba, mp->virt, mp->phys);
 448         kfree(mp);
 449 fail_free_mbox:
 450         mempool_free(mbox, phba->mbox_mem_pool);
 451
 452 fail:
 453         lpfc_vport_set_state(vport, FC_VPORT_FAILED);
 454         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
 455                          "0249 Cannot issue Register Fabric login: Err %d\n",
 456                          err);
 457         return -ENXIO;
 458 }
 459
 460 /**
 461  * lpfc_issue_reg_vfi - Register VFI for this vport's fabric login
 462  * @vport: pointer to a host virtual N_Port data structure.
 463  *
 464  * This routine issues a REG_VFI mailbox for the vfi, vpi, fcfi triplet for
 465  * the @vport. This mailbox command is necessary for SLI4 port only.
 466  *
 467  * Return code
 468  *   0 - successfully issued REG_VFI for @vport
 469  *   A failure code otherwise.
 470  **/
 471 int
 472 lpfc_issue_reg_vfi(struct lpfc_vport *vport)
 473 {
 474         struct lpfc_hba  *phba = vport->phba;
 475         LPFC_MBOXQ_t *mboxq = NULL;
 476         struct lpfc_nodelist *ndlp;
 477         struct lpfc_dmabuf *dmabuf = NULL;
 478         int rc = 0;
 479
 480         /* move forward in case of SLI4 FC port loopback test and pt2pt mode */
 481         if ((phba->sli_rev == LPFC_SLI_REV4) &&
 482             !(phba->link_flag & LS_LOOPBACK_MODE) &&
 483             !(vport->fc_flag & FC_PT2PT)) {
 484                 ndlp = lpfc_findnode_did(vport, Fabric_DID);
 485                 if (!ndlp) {
 486                         rc = -ENODEV;
 487                         goto fail;
 488                 }
 489         }
 490
 491         mboxq = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
 492         if (!mboxq) {
 493                 rc = -ENOMEM;
 494                 goto fail;
 495         }
 496
 497         /* Supply CSP's only if we are fabric connect or pt-to-pt connect */
 498         if ((vport->fc_flag & FC_FABRIC) || (vport->fc_flag & FC_PT2PT)) {
 499                 dmabuf = kzalloc(sizeof(struct lpfc_dmabuf), GFP_KERNEL);
 500                 if (!dmabuf) {
 501                         rc = -ENOMEM;
 502                         goto fail;
 503                 }
 504                 dmabuf->virt = lpfc_mbuf_alloc(phba, MEM_PRI, &dmabuf->phys);
 505                 if (!dmabuf->virt) {
 506                         rc = -ENOMEM;
 507                         goto fail;
 508                 }
 509                 memcpy(dmabuf->virt, &phba->fc_fabparam,
 510                        sizeof(struct serv_parm));
 511         }
 512
 513         vport->port_state = LPFC_FABRIC_CFG_LINK;
 514         if (dmabuf)
 515                 lpfc_reg_vfi(mboxq, vport, dmabuf->phys);
 516         else
 517                 lpfc_reg_vfi(mboxq, vport, 0);
 518
 519         mboxq->mbox_cmpl = lpfc_mbx_cmpl_reg_vfi;
 520         mboxq->vport = vport;
 521         mboxq->ctx_buf = dmabuf;
 522         rc = lpfc_sli_issue_mbox(phba, mboxq, MBX_NOWAIT);
 523         if (rc == MBX_NOT_FINISHED) {
 524                 rc = -ENXIO;
 525                 goto fail;
 526         }
 527         return 0;
 528
 529 fail:
 530         if (mboxq)
 531                 mempool_free(mboxq, phba->mbox_mem_pool);
 532         if (dmabuf) {
 533                 if (dmabuf->virt)
 534                         lpfc_mbuf_free(phba, dmabuf->virt, dmabuf->phys);
 535                 kfree(dmabuf);
 536         }
 537
 538         lpfc_vport_set_state(vport, FC_VPORT_FAILED);
 539         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
 540                          "0289 Issue Register VFI failed: Err %d\n", rc);
 541         return rc;
 542 }
 543
 544 /**
 545  * lpfc_issue_unreg_vfi - Unregister VFI for this vport's fabric login
 546  * @vport: pointer to a host virtual N_Port data structure.
 547  *
 548  * This routine issues a UNREG_VFI mailbox with the vfi, vpi, fcfi triplet for
 549  * the @vport. This mailbox command is necessary for SLI4 port only.
 550  *
 551  * Return code
 552  *   0 - successfully issued REG_VFI for @vport
 553  *   A failure code otherwise.
 554  **/
 555 int
 556 lpfc_issue_unreg_vfi(struct lpfc_vport *vport)
 557 {
 558         struct lpfc_hba *phba = vport->phba;
 559         struct Scsi_Host *shost;
 560         LPFC_MBOXQ_t *mboxq;
 561         int rc;
 562
 563         mboxq = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
 564         if (!mboxq) {
 565                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
 566                                 "2556 UNREG_VFI mbox allocation failed"
 567                                 "HBA state x%x\n", phba->pport->port_state);
 568                 return -ENOMEM;
 569         }
 570
 571         lpfc_unreg_vfi(mboxq, vport);
 572         mboxq->vport = vport;
 573         mboxq->mbox_cmpl = lpfc_unregister_vfi_cmpl;
 574
 575         rc = lpfc_sli_issue_mbox(phba, mboxq, MBX_NOWAIT);
 576         if (rc == MBX_NOT_FINISHED) {
 577                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
 578                                 "2557 UNREG_VFI issue mbox failed rc x%x "
 579                                 "HBA state x%x\n",
 580                                 rc, phba->pport->port_state);
 581                 mempool_free(mboxq, phba->mbox_mem_pool);
 582                 return -EIO;
 583         }
 584
 585         shost = lpfc_shost_from_vport(vport);
 586         spin_lock_irq(shost->host_lock);
 587         vport->fc_flag &= ~FC_VFI_REGISTERED;
 588         spin_unlock_irq(shost->host_lock);
 589         return 0;
 590 }
 591
 592 /**
 593  * lpfc_check_clean_addr_bit - Check whether assigned FCID is clean.
 594  * @vport: pointer to a host virtual N_Port data structure.
 595  * @sp: pointer to service parameter data structure.
 596  *
 597  * This routine is called from FLOGI/FDISC completion handler functions.
 598  * lpfc_check_clean_addr_bit return 1 when FCID/Fabric portname/ Fabric
 599  * node nodename is changed in the completion service parameter else return
 600  * 0. This function also set flag in the vport data structure to delay
 601  * NP_Port discovery after the FLOGI/FDISC completion if Clean address bit
 602  * in FLOGI/FDISC response is cleared and FCID/Fabric portname/ Fabric
 603  * node nodename is changed in the completion service parameter.
 604  *
 605  * Return code
 606  *   0 - FCID and Fabric Nodename and Fabric portname is not changed.
 607  *   1 - FCID or Fabric Nodename or Fabric portname is changed.
 608  *
 609  **/
 610 static uint8_t
 611 lpfc_check_clean_addr_bit(struct lpfc_vport *vport,
 612                 struct serv_parm *sp)
 613 {
 614         struct lpfc_hba *phba = vport->phba;
 615         uint8_t fabric_param_changed = 0;
 616         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
 617
 618         if ((vport->fc_prevDID != vport->fc_myDID) ||
 619                 memcmp(&vport->fabric_portname, &sp->portName,
 620                         sizeof(struct lpfc_name)) ||
 621                 memcmp(&vport->fabric_nodename, &sp->nodeName,
 622                         sizeof(struct lpfc_name)) ||
 623                 (vport->vport_flag & FAWWPN_PARAM_CHG)) {
 624                 fabric_param_changed = 1;
 625                 vport->vport_flag &= ~FAWWPN_PARAM_CHG;
 626         }
 627         /*
 628          * Word 1 Bit 31 in common service parameter is overloaded.
 629          * Word 1 Bit 31 in FLOGI request is multiple NPort request
 630          * Word 1 Bit 31 in FLOGI response is clean address bit
 631          *
 632          * If fabric parameter is changed and clean address bit is
 633          * cleared delay nport discovery if
 634          * - vport->fc_prevDID != 0 (not initial discovery) OR
 635          * - lpfc_delay_discovery module parameter is set.
 636          */
 637         if (fabric_param_changed && !sp->cmn.clean_address_bit &&
 638             (vport->fc_prevDID || phba->cfg_delay_discovery)) {
 639                 spin_lock_irq(shost->host_lock);
 640                 vport->fc_flag |= FC_DISC_DELAYED;
 641                 spin_unlock_irq(shost->host_lock);
 642         }
 643
 644         return fabric_param_changed;
 645 }
 646
 647
 648 /**
 649  * lpfc_cmpl_els_flogi_fabric - Completion function for flogi to a fabric port
 650  * @vport: pointer to a host virtual N_Port data structure.
 651  * @ndlp: pointer to a node-list data structure.
 652  * @sp: pointer to service parameter data structure.
 653  * @irsp: pointer to the IOCB within the lpfc response IOCB.
 654  *
 655  * This routine is invoked by the lpfc_cmpl_els_flogi() completion callback
 656  * function to handle the completion of a Fabric Login (FLOGI) into a fabric
 657  * port in a fabric topology. It properly sets up the parameters to the @ndlp
 658  * from the IOCB response. It also check the newly assigned N_Port ID to the
 659  * @vport against the previously assigned N_Port ID. If it is different from
 660  * the previously assigned Destination ID (DID), the lpfc_unreg_rpi() routine
 661  * is invoked on all the remaining nodes with the @vport to unregister the
 662  * Remote Port Indicators (RPIs). Finally, the lpfc_issue_fabric_reglogin()
 663  * is invoked to register login to the fabric.
 664  *
 665  * Return code
 666  *   0 - Success (currently, always return 0)
 667  **/
 668 static int
 669 lpfc_cmpl_els_flogi_fabric(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 670                            struct serv_parm *sp, IOCB_t *irsp)
 671 {
 672         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
 673         struct lpfc_hba  *phba = vport->phba;
 674         struct lpfc_nodelist *np;
 675         struct lpfc_nodelist *next_np;
 676         uint8_t fabric_param_changed;
 677
 678         spin_lock_irq(shost->host_lock);
 679         vport->fc_flag |= FC_FABRIC;
 680         spin_unlock_irq(shost->host_lock);
 681
 682         phba->fc_edtov = be32_to_cpu(sp->cmn.e_d_tov);
 683         if (sp->cmn.edtovResolution)    /* E_D_TOV ticks are in nanoseconds */
 684                 phba->fc_edtov = (phba->fc_edtov + 999999) / 1000000;
 685
 686         phba->fc_edtovResol = sp->cmn.edtovResolution;
 687         phba->fc_ratov = (be32_to_cpu(sp->cmn.w2.r_a_tov) + 999) / 1000;
 688
 689         if (phba->fc_topology == LPFC_TOPOLOGY_LOOP) {
 690                 spin_lock_irq(shost->host_lock);
 691                 vport->fc_flag |= FC_PUBLIC_LOOP;
 692                 spin_unlock_irq(shost->host_lock);
 693         }
 694
 695         vport->fc_myDID = irsp->un.ulpWord[4] & Mask_DID;
 696         memcpy(&ndlp->nlp_portname, &sp->portName, sizeof(struct lpfc_name));
 697         memcpy(&ndlp->nlp_nodename, &sp->nodeName, sizeof(struct lpfc_name));
 698         ndlp->nlp_class_sup = 0;
 699         if (sp->cls1.classValid)
 700                 ndlp->nlp_class_sup |= FC_COS_CLASS1;
 701         if (sp->cls2.classValid)
 702                 ndlp->nlp_class_sup |= FC_COS_CLASS2;
 703         if (sp->cls3.classValid)
 704                 ndlp->nlp_class_sup |= FC_COS_CLASS3;
 705         if (sp->cls4.classValid)
 706                 ndlp->nlp_class_sup |= FC_COS_CLASS4;
 707         ndlp->nlp_maxframe = ((sp->cmn.bbRcvSizeMsb & 0x0F) << 8) |
 708                                 sp->cmn.bbRcvSizeLsb;
 709
 710         fabric_param_changed = lpfc_check_clean_addr_bit(vport, sp);
 711         if (fabric_param_changed) {
 712                 /* Reset FDMI attribute masks based on config parameter */
 713                 if (phba->cfg_enable_SmartSAN ||
 714                     (phba->cfg_fdmi_on == LPFC_FDMI_SUPPORT)) {
 715                         /* Setup appropriate attribute masks */
 716                         vport->fdmi_hba_mask = LPFC_FDMI2_HBA_ATTR;
 717                         if (phba->cfg_enable_SmartSAN)
 718                                 vport->fdmi_port_mask = LPFC_FDMI2_SMART_ATTR;
 719                         else
 720                                 vport->fdmi_port_mask = LPFC_FDMI2_PORT_ATTR;
 721                 } else {
 722                         vport->fdmi_hba_mask = 0;
 723                         vport->fdmi_port_mask = 0;
 724                 }
 725
 726         }
 727         memcpy(&vport->fabric_portname, &sp->portName,
 728                         sizeof(struct lpfc_name));
 729         memcpy(&vport->fabric_nodename, &sp->nodeName,
 730                         sizeof(struct lpfc_name));
 731         memcpy(&phba->fc_fabparam, sp, sizeof(struct serv_parm));
 732
 733         if (phba->sli3_options & LPFC_SLI3_NPIV_ENABLED) {
 734                 if (sp->cmn.response_multiple_NPort) {
 735                         lpfc_printf_vlog(vport, KERN_WARNING,
 736                                          LOG_ELS | LOG_VPORT,
 737                                          "1816 FLOGI NPIV supported, "
 738                                          "response data 0x%x\n",
 739                                          sp->cmn.response_multiple_NPort);
 740                         spin_lock_irq(&phba->hbalock);
 741                         phba->link_flag |= LS_NPIV_FAB_SUPPORTED;
 742                         spin_unlock_irq(&phba->hbalock);
 743                 } else {
 744                         /* Because we asked f/w for NPIV it still expects us
 745                         to call reg_vnpid at least for the physical host */
 746                         lpfc_printf_vlog(vport, KERN_WARNING,
 747                                          LOG_ELS | LOG_VPORT,
 748                                          "1817 Fabric does not support NPIV "
 749                                          "- configuring single port mode.\n");
 750                         spin_lock_irq(&phba->hbalock);
 751                         phba->link_flag &= ~LS_NPIV_FAB_SUPPORTED;
 752                         spin_unlock_irq(&phba->hbalock);
 753                 }
 754         }
 755
 756         /*
 757          * For FC we need to do some special processing because of the SLI
 758          * Port's default settings of the Common Service Parameters.
 759          */
 760         if ((phba->sli_rev == LPFC_SLI_REV4) &&
 761             (phba->sli4_hba.lnk_info.lnk_tp == LPFC_LNK_TYPE_FC)) {
 762                 /* If physical FC port changed, unreg VFI and ALL VPIs / RPIs */
 763                 if (fabric_param_changed)
 764                         lpfc_unregister_fcf_prep(phba);
 765
 766                 /* This should just update the VFI CSPs*/
 767                 if (vport->fc_flag & FC_VFI_REGISTERED)
 768                         lpfc_issue_reg_vfi(vport);
 769         }
 770
 771         if (fabric_param_changed &&
 772                 !(vport->fc_flag & FC_VPORT_NEEDS_REG_VPI)) {
 773
 774                 /* If our NportID changed, we need to ensure all
 775                  * remaining NPORTs get unreg_login'ed.
 776                  */
 777                 list_for_each_entry_safe(np, next_np,
 778                                         &vport->fc_nodes, nlp_listp) {
 779                         if ((np->nlp_state != NLP_STE_NPR_NODE) ||
 780                                    !(np->nlp_flag & NLP_NPR_ADISC))
 781                                 continue;
 782                         spin_lock_irq(&np->lock);
 783                         np->nlp_flag &= ~NLP_NPR_ADISC;
 784                         spin_unlock_irq(&np->lock);
 785                         lpfc_unreg_rpi(vport, np);
 786                 }
 787                 lpfc_cleanup_pending_mbox(vport);
 788
 789                 if (phba->sli_rev == LPFC_SLI_REV4) {
 790                         lpfc_sli4_unreg_all_rpis(vport);
 791                         lpfc_mbx_unreg_vpi(vport);
 792                         spin_lock_irq(shost->host_lock);
 793                         vport->fc_flag |= FC_VPORT_NEEDS_INIT_VPI;
 794                         spin_unlock_irq(shost->host_lock);
 795                 }
 796
 797                 /*
 798                  * For SLI3 and SLI4, the VPI needs to be reregistered in
 799                  * response to this fabric parameter change event.
 800                  */
 801                 spin_lock_irq(shost->host_lock);
 802                 vport->fc_flag |= FC_VPORT_NEEDS_REG_VPI;
 803                 spin_unlock_irq(shost->host_lock);
 804         } else if ((phba->sli_rev == LPFC_SLI_REV4) &&
 805                 !(vport->fc_flag & FC_VPORT_NEEDS_REG_VPI)) {
 806                         /*
 807                          * Driver needs to re-reg VPI in order for f/w
 808                          * to update the MAC address.
 809                          */
 810                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
 811                         lpfc_register_new_vport(phba, vport, ndlp);
 812                         return 0;
 813         }
 814
 815         if (phba->sli_rev < LPFC_SLI_REV4) {
 816                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_REG_LOGIN_ISSUE);
 817                 if (phba->sli3_options & LPFC_SLI3_NPIV_ENABLED &&
 818                     vport->fc_flag & FC_VPORT_NEEDS_REG_VPI)
 819                         lpfc_register_new_vport(phba, vport, ndlp);
 820                 else
 821                         lpfc_issue_fabric_reglogin(vport);
 822         } else {
 823                 ndlp->nlp_type |= NLP_FABRIC;
 824                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
 825                 if ((!(vport->fc_flag & FC_VPORT_NEEDS_REG_VPI)) &&
 826                         (vport->vpi_state & LPFC_VPI_REGISTERED)) {
 827                         lpfc_start_fdiscs(phba);
 828                         lpfc_do_scr_ns_plogi(phba, vport);
 829                 } else if (vport->fc_flag & FC_VFI_REGISTERED)
 830                         lpfc_issue_init_vpi(vport);
 831                 else {
 832                         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
 833                                         "3135 Need register VFI: (x%x/%x)\n",
 834                                         vport->fc_prevDID, vport->fc_myDID);
 835                         lpfc_issue_reg_vfi(vport);
 836                 }
 837         }
 838         return 0;
 839 }
 840
 841 /**
 842  * lpfc_cmpl_els_flogi_nport - Completion function for flogi to an N_Port
 843  * @vport: pointer to a host virtual N_Port data structure.
 844  * @ndlp: pointer to a node-list data structure.
 845  * @sp: pointer to service parameter data structure.
 846  *
 847  * This routine is invoked by the lpfc_cmpl_els_flogi() completion callback
 848  * function to handle the completion of a Fabric Login (FLOGI) into an N_Port
 849  * in a point-to-point topology. First, the @vport's N_Port Name is compared
 850  * with the received N_Port Name: if the @vport's N_Port Name is greater than
 851  * the received N_Port Name lexicographically, this node shall assign local
 852  * N_Port ID (PT2PT_LocalID: 1) and remote N_Port ID (PT2PT_RemoteID: 2) and
 853  * will send out Port Login (PLOGI) with the N_Port IDs assigned. Otherwise,
 854  * this node shall just wait for the remote node to issue PLOGI and assign
 855  * N_Port IDs.
 856  *
 857  * Return code
 858  *   0 - Success
 859  *   -ENXIO - Fail
 860  **/
 861 static int
 862 lpfc_cmpl_els_flogi_nport(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 863                           struct serv_parm *sp)
 864 {
 865         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
 866         struct lpfc_hba  *phba = vport->phba;
 867         LPFC_MBOXQ_t *mbox;
 868         int rc;
 869
 870         spin_lock_irq(shost->host_lock);
 871         vport->fc_flag &= ~(FC_FABRIC | FC_PUBLIC_LOOP);
 872         vport->fc_flag |= FC_PT2PT;
 873         spin_unlock_irq(shost->host_lock);
 874
 875         /* If we are pt2pt with another NPort, force NPIV off! */
 876         phba->sli3_options &= ~LPFC_SLI3_NPIV_ENABLED;
 877
 878         /* If physical FC port changed, unreg VFI and ALL VPIs / RPIs */
 879         if ((phba->sli_rev == LPFC_SLI_REV4) && phba->fc_topology_changed) {
 880                 lpfc_unregister_fcf_prep(phba);
 881
 882                 spin_lock_irq(shost->host_lock);
 883                 vport->fc_flag &= ~FC_VFI_REGISTERED;
 884                 spin_unlock_irq(shost->host_lock);
 885                 phba->fc_topology_changed = 0;
 886         }
 887
 888         rc = memcmp(&vport->fc_portname, &sp->portName,
 889                     sizeof(vport->fc_portname));
 890
 891         if (rc >= 0) {
 892                 /* This side will initiate the PLOGI */
 893                 spin_lock_irq(shost->host_lock);
 894                 vport->fc_flag |= FC_PT2PT_PLOGI;
 895                 spin_unlock_irq(shost->host_lock);
 896
 897                 /*
 898                  * N_Port ID cannot be 0, set our Id to LocalID
 899                  * the other side will be RemoteID.
 900                  */
 901
 902                 /* not equal */
 903                 if (rc)
 904                         vport->fc_myDID = PT2PT_LocalID;
 905
 906                 /* Decrement ndlp reference count indicating that ndlp can be
 907                  * safely released when other references to it are done.
 908                  */
 909                 lpfc_nlp_put(ndlp);
 910
 911                 ndlp = lpfc_findnode_did(vport, PT2PT_RemoteID);
 912                 if (!ndlp) {
 913                         /*
 914                          * Cannot find existing Fabric ndlp, so allocate a
 915                          * new one
 916                          */
 917                         ndlp = lpfc_nlp_init(vport, PT2PT_RemoteID);
 918                         if (!ndlp)
 919                                 goto fail;
 920                 }
 921
 922                 memcpy(&ndlp->nlp_portname, &sp->portName,
 923                        sizeof(struct lpfc_name));
 924                 memcpy(&ndlp->nlp_nodename, &sp->nodeName,
 925                        sizeof(struct lpfc_name));
 926                 /* Set state will put ndlp onto node list if not already done */
 927                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
 928                 spin_lock_irq(&ndlp->lock);
 929                 ndlp->nlp_flag |= NLP_NPR_2B_DISC;
 930                 spin_unlock_irq(&ndlp->lock);
 931
 932                 mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
 933                 if (!mbox)
 934                         goto fail;
 935
 936                 lpfc_config_link(phba, mbox);
 937
 938                 mbox->mbox_cmpl = lpfc_mbx_cmpl_local_config_link;
 939                 mbox->vport = vport;
 940                 rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
 941                 if (rc == MBX_NOT_FINISHED) {
 942                         mempool_free(mbox, phba->mbox_mem_pool);
 943                         goto fail;
 944                 }
 945         } else {
 946                 /* This side will wait for the PLOGI, decrement ndlp reference
 947                  * count indicating that ndlp can be released when other
 948                  * references to it are done.
 949                  */
 950                 lpfc_nlp_put(ndlp);
 951
 952                 /* Start discovery - this should just do CLEAR_LA */
 953                 lpfc_disc_start(vport);
 954         }
 955
 956         return 0;
 957 fail:
 958         return -ENXIO;
 959 }
 960
 961 /**
 962  * lpfc_cmpl_els_flogi - Completion callback function for flogi
 963  * @phba: pointer to lpfc hba data structure.
 964  * @cmdiocb: pointer to lpfc command iocb data structure.
 965  * @rspiocb: pointer to lpfc response iocb data structure.
 966  *
 967  * This routine is the top-level completion callback function for issuing
 968  * a Fabric Login (FLOGI) command. If the response IOCB reported error,
 969  * the lpfc_els_retry() routine shall be invoked to retry the FLOGI. If
 970  * retry has been made (either immediately or delayed with lpfc_els_retry()
 971  * returning 1), the command IOCB will be released and function returned.
 972  * If the retry attempt has been given up (possibly reach the maximum
 973  * number of retries), one additional decrement of ndlp reference shall be
 974  * invoked before going out after releasing the command IOCB. This will
 975  * actually release the remote node (Note, lpfc_els_free_iocb() will also
 976  * invoke one decrement of ndlp reference count). If no error reported in
 977  * the IOCB status, the command Port ID field is used to determine whether
 978  * this is a point-to-point topology or a fabric topology: if the Port ID
 979  * field is assigned, it is a fabric topology; otherwise, it is a
 980  * point-to-point topology. The routine lpfc_cmpl_els_flogi_fabric() or
 981  * lpfc_cmpl_els_flogi_nport() shall be invoked accordingly to handle the
 982  * specific topology completion conditions.
 983  **/
 984 static void
 985 lpfc_cmpl_els_flogi(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
 986                     struct lpfc_iocbq *rspiocb)
 987 {
 988         struct lpfc_vport *vport = cmdiocb->vport;
 989         struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
 990         IOCB_t *irsp = &rspiocb->iocb;
 991         struct lpfc_nodelist *ndlp = cmdiocb->context1;
 992         struct lpfc_dmabuf *pcmd = cmdiocb->context2, *prsp;
 993         struct serv_parm *sp;
 994         uint16_t fcf_index;
 995         int rc;
 996
 997         /* Check to see if link went down during discovery */
 998         if (lpfc_els_chk_latt(vport)) {
 999                 /* One additional decrement on node reference count to
1000                  * trigger the release of the node
1001                  */
1002                 lpfc_nlp_put(ndlp);
1003                 goto out;
1004         }
1005
1006         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
1007                 "FLOGI cmpl:      status:x%x/x%x state:x%x",
1008                 irsp->ulpStatus, irsp->un.ulpWord[4],
1009                 vport->port_state);
1010
1011         if (irsp->ulpStatus) {
1012                 /*
1013                  * In case of FIP mode, perform roundrobin FCF failover
1014                  * due to new FCF discovery
1015                  */
1016                 if ((phba->hba_flag & HBA_FIP_SUPPORT) &&
1017                     (phba->fcf.fcf_flag & FCF_DISCOVERY)) {
1018                         if (phba->link_state < LPFC_LINK_UP)
1019                                 goto stop_rr_fcf_flogi;
1020                         if ((phba->fcoe_cvl_eventtag_attn ==
1021                              phba->fcoe_cvl_eventtag) &&
1022                             (irsp->ulpStatus == IOSTAT_LOCAL_REJECT) &&
1023                             ((irsp->un.ulpWord[4] & IOERR_PARAM_MASK) ==
1024                             IOERR_SLI_ABORTED))
1025                                 goto stop_rr_fcf_flogi;
1026                         else
1027                                 phba->fcoe_cvl_eventtag_attn =
1028                                         phba->fcoe_cvl_eventtag;
1029                         lpfc_printf_log(phba, KERN_WARNING, LOG_FIP | LOG_ELS,
1030                                         "2611 FLOGI failed on FCF (x%x), "
1031                                         "status:x%x/x%x, tmo:x%x, perform "
1032                                         "roundrobin FCF failover\n",
1033                                         phba->fcf.current_rec.fcf_indx,
1034                                         irsp->ulpStatus, irsp->un.ulpWord[4],
1035                                         irsp->ulpTimeout);
1036                         lpfc_sli4_set_fcf_flogi_fail(phba,
1037                                         phba->fcf.current_rec.fcf_indx);
1038                         fcf_index = lpfc_sli4_fcf_rr_next_index_get(phba);
1039                         rc = lpfc_sli4_fcf_rr_next_proc(vport, fcf_index);
1040                         if (rc)
1041                                 goto out;
1042                 }
1043
1044 stop_rr_fcf_flogi:
1045                 /* FLOGI failure */
1046                 if (!(irsp->ulpStatus == IOSTAT_LOCAL_REJECT &&
1047                       ((irsp->un.ulpWord[4] & IOERR_PARAM_MASK) ==
1048                                         IOERR_LOOP_OPEN_FAILURE)))
1049                         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
1050                                          "2858 FLOGI failure Status:x%x/x%x TMO"
1051                                          ":x%x Data x%x x%x\n",
1052                                          irsp->ulpStatus, irsp->un.ulpWord[4],
1053                                          irsp->ulpTimeout, phba->hba_flag,
1054                                          phba->fcf.fcf_flag);
1055
1056                 /* Check for retry */
1057                 if (lpfc_els_retry(phba, cmdiocb, rspiocb))
1058                         goto out;
1059
1060                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_TRACE_EVENT,
1061                                  "0150 FLOGI failure Status:x%x/x%x "
1062                                  "xri x%x TMO:x%x refcnt %d\n",
1063                                  irsp->ulpStatus, irsp->un.ulpWord[4],
1064                                  cmdiocb->sli4_xritag, irsp->ulpTimeout,
1065                                  kref_read(&ndlp->kref));
1066
1067                 /* If this is not a loop open failure, bail out */
1068                 if (!(irsp->ulpStatus == IOSTAT_LOCAL_REJECT &&
1069                       ((irsp->un.ulpWord[4] & IOERR_PARAM_MASK) ==
1070                                         IOERR_LOOP_OPEN_FAILURE)))
1071                         goto flogifail;
1072
1073                 /* FLOGI failed, so there is no fabric */
1074                 spin_lock_irq(shost->host_lock);
1075                 vport->fc_flag &= ~(FC_FABRIC | FC_PUBLIC_LOOP);
1076                 spin_unlock_irq(shost->host_lock);
1077
1078                 /* If private loop, then allow max outstanding els to be
1079                  * LPFC_MAX_DISC_THREADS (32). Scanning in the case of no
1080                  * alpa map would take too long otherwise.
1081                  */
1082                 if (phba->alpa_map[0] == 0)
1083                         vport->cfg_discovery_threads = LPFC_MAX_DISC_THREADS;
1084                 if ((phba->sli_rev == LPFC_SLI_REV4) &&
1085                     (!(vport->fc_flag & FC_VFI_REGISTERED) ||
1086                      (vport->fc_prevDID != vport->fc_myDID) ||
1087                         phba->fc_topology_changed)) {
1088                         if (vport->fc_flag & FC_VFI_REGISTERED) {
1089                                 if (phba->fc_topology_changed) {
1090                                         lpfc_unregister_fcf_prep(phba);
1091                                         spin_lock_irq(shost->host_lock);
1092                                         vport->fc_flag &= ~FC_VFI_REGISTERED;
1093                                         spin_unlock_irq(shost->host_lock);
1094                                         phba->fc_topology_changed = 0;
1095                                 } else {
1096                                         lpfc_sli4_unreg_all_rpis(vport);
1097                                 }
1098                         }
1099
1100                         /* Do not register VFI if the driver aborted FLOGI */
1101                         if (!lpfc_error_lost_link(irsp))
1102                                 lpfc_issue_reg_vfi(vport);
1103
1104                         lpfc_nlp_put(ndlp);
1105                         goto out;
1106                 }
1107                 goto flogifail;
1108         }
1109         spin_lock_irq(shost->host_lock);
1110         vport->fc_flag &= ~FC_VPORT_CVL_RCVD;
1111         vport->fc_flag &= ~FC_VPORT_LOGO_RCVD;
1112         spin_unlock_irq(shost->host_lock);
1113
1114         /*
1115          * The FLogI succeeded.  Sync the data for the CPU before
1116          * accessing it.
1117          */
1118         prsp = list_get_first(&pcmd->list, struct lpfc_dmabuf, list);
1119         if (!prsp)
1120                 goto out;
1121         sp = prsp->virt + sizeof(uint32_t);
1122
1123         /* FLOGI completes successfully */
1124         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
1125                          "0101 FLOGI completes successfully, I/O tag:x%x, "
1126                          "xri x%x Data: x%x x%x x%x x%x x%x x%x x%x %d\n",
1127                          cmdiocb->iotag, cmdiocb->sli4_xritag,
1128                          irsp->un.ulpWord[4], sp->cmn.e_d_tov,
1129                          sp->cmn.w2.r_a_tov, sp->cmn.edtovResolution,
1130                          vport->port_state, vport->fc_flag,
1131                          sp->cmn.priority_tagging, kref_read(&ndlp->kref));
1132
1133         if (sp->cmn.priority_tagging)
1134                 vport->vmid_flag |= LPFC_VMID_ISSUE_QFPA;
1135
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, irsp);
1143                 else if (!(phba->hba_flag & HBA_FCOE_MODE))
1144                         rc = lpfc_cmpl_els_flogi_nport(vport, ndlp, sp);
1145                 else {
1146                         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
1147                                 "2831 FLOGI response with cleared Fabric "
1148                                 "bit fcf_index 0x%x "
1149                                 "Switch Name %02x%02x%02x%02x%02x%02x%02x%02x "
1150                                 "Fabric Name "
1151                                 "%02x%02x%02x%02x%02x%02x%02x%02x\n",
1152                                 phba->fcf.current_rec.fcf_indx,
1153                                 phba->fcf.current_rec.switch_name[0],
1154                                 phba->fcf.current_rec.switch_name[1],
1155                                 phba->fcf.current_rec.switch_name[2],
1156                                 phba->fcf.current_rec.switch_name[3],
1157                                 phba->fcf.current_rec.switch_name[4],
1158                                 phba->fcf.current_rec.switch_name[5],
1159                                 phba->fcf.current_rec.switch_name[6],
1160                                 phba->fcf.current_rec.switch_name[7],
1161                                 phba->fcf.current_rec.fabric_name[0],
1162                                 phba->fcf.current_rec.fabric_name[1],
1163                                 phba->fcf.current_rec.fabric_name[2],
1164                                 phba->fcf.current_rec.fabric_name[3],
1165                                 phba->fcf.current_rec.fabric_name[4],
1166                                 phba->fcf.current_rec.fabric_name[5],
1167                                 phba->fcf.current_rec.fabric_name[6],
1168                                 phba->fcf.current_rec.fabric_name[7]);
1169
1170                         lpfc_nlp_put(ndlp);
1171                         spin_lock_irq(&phba->hbalock);
1172                         phba->fcf.fcf_flag &= ~FCF_DISCOVERY;
1173                         phba->hba_flag &= ~(FCF_RR_INPROG | HBA_DEVLOSS_TMO);
1174                         spin_unlock_irq(&phba->hbalock);
1175                         phba->fcf.fcf_redisc_attempted = 0; /* reset */
1176                         goto out;
1177                 }
1178                 if (!rc) {
1179                         /* Mark the FCF discovery process done */
1180                         if (phba->hba_flag & HBA_FIP_SUPPORT)
1181                                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FIP |
1182                                                 LOG_ELS,
1183                                                 "2769 FLOGI to FCF (x%x) "
1184                                                 "completed successfully\n",
1185                                                 phba->fcf.current_rec.fcf_indx);
1186                         spin_lock_irq(&phba->hbalock);
1187                         phba->fcf.fcf_flag &= ~FCF_DISCOVERY;
1188                         phba->hba_flag &= ~(FCF_RR_INPROG | HBA_DEVLOSS_TMO);
1189                         spin_unlock_irq(&phba->hbalock);
1190                         phba->fcf.fcf_redisc_attempted = 0; /* reset */
1191                         goto out;
1192                 }
1193         } else if (vport->port_state > LPFC_FLOGI &&
1194                    vport->fc_flag & FC_PT2PT) {
1195                 /*
1196                  * In a p2p topology, it is possible that discovery has
1197                  * already progressed, and this completion can be ignored.
1198                  * Recheck the indicated topology.
1199                  */
1200                 if (!sp->cmn.fPort)
1201                         goto out;
1202         }
1203
1204 flogifail:
1205         spin_lock_irq(&phba->hbalock);
1206         phba->fcf.fcf_flag &= ~FCF_DISCOVERY;
1207         spin_unlock_irq(&phba->hbalock);
1208
1209         if (!lpfc_error_lost_link(irsp)) {
1210                 /* FLOGI failed, so just use loop map to make discovery list */
1211                 lpfc_disc_list_loopmap(vport);
1212
1213                 /* Start discovery */
1214                 lpfc_disc_start(vport);
1215         } else if (((irsp->ulpStatus != IOSTAT_LOCAL_REJECT) ||
1216                         (((irsp->un.ulpWord[4] & IOERR_PARAM_MASK) !=
1217                          IOERR_SLI_ABORTED) &&
1218                         ((irsp->un.ulpWord[4] & IOERR_PARAM_MASK) !=
1219                          IOERR_SLI_DOWN))) &&
1220                         (phba->link_state != LPFC_CLEAR_LA)) {
1221                 /* If FLOGI failed enable link interrupt. */
1222                 lpfc_issue_clear_la(phba, vport);
1223         }
1224 out:
1225         phba->hba_flag &= ~HBA_FLOGI_OUTSTANDING;
1226         lpfc_els_free_iocb(phba, cmdiocb);
1227         lpfc_nlp_put(ndlp);
1228 }
1229
1230 /**
1231  * lpfc_cmpl_els_link_down - Completion callback function for ELS command
1232  *                           aborted during a link down
1233  * @phba: pointer to lpfc hba data structure.
1234  * @cmdiocb: pointer to lpfc command iocb data structure.
1235  * @rspiocb: pointer to lpfc response iocb data structure.
1236  *
1237  */
1238 static void
1239 lpfc_cmpl_els_link_down(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
1240                         struct lpfc_iocbq *rspiocb)
1241 {
1242         IOCB_t *irsp;
1243         uint32_t *pcmd;
1244         uint32_t cmd;
1245
1246         pcmd = (uint32_t *)(((struct lpfc_dmabuf *)cmdiocb->context2)->virt);
1247         cmd = *pcmd;
1248         irsp = &rspiocb->iocb;
1249
1250         lpfc_printf_log(phba, KERN_INFO, LOG_ELS,
1251                         "6445 ELS completes after LINK_DOWN: "
1252                         " Status %x/%x cmd x%x flg x%x\n",
1253                         irsp->ulpStatus, irsp->un.ulpWord[4], cmd,
1254                         cmdiocb->iocb_flag);
1255
1256         if (cmdiocb->iocb_flag & LPFC_IO_FABRIC) {
1257                 cmdiocb->iocb_flag &= ~LPFC_IO_FABRIC;
1258                 atomic_dec(&phba->fabric_iocb_count);
1259         }
1260         lpfc_els_free_iocb(phba, cmdiocb);
1261 }
1262
1263 /**
1264  * lpfc_issue_els_flogi - Issue an flogi iocb command for a vport
1265  * @vport: pointer to a host virtual N_Port data structure.
1266  * @ndlp: pointer to a node-list data structure.
1267  * @retry: number of retries to the command IOCB.
1268  *
1269  * This routine issues a Fabric Login (FLOGI) Request ELS command
1270  * for a @vport. The initiator service parameters are put into the payload
1271  * of the FLOGI Request IOCB and the top-level callback function pointer
1272  * to lpfc_cmpl_els_flogi() routine is put to the IOCB completion callback
1273  * function field. The lpfc_issue_fabric_iocb routine is invoked to send
1274  * out FLOGI ELS command with one outstanding fabric IOCB at a time.
1275  *
1276  * Note that the ndlp reference count will be incremented by 1 for holding the
1277  * ndlp and the reference to ndlp will be stored into the context1 field of
1278  * the IOCB for the completion callback function to the FLOGI ELS command.
1279  *
1280  * Return code
1281  *   0 - successfully issued flogi iocb for @vport
1282  *   1 - failed to issue flogi iocb for @vport
1283  **/
1284 static int
1285 lpfc_issue_els_flogi(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1286                      uint8_t retry)
1287 {
1288         struct lpfc_hba  *phba = vport->phba;
1289         struct serv_parm *sp;
1290         IOCB_t *icmd;
1291         struct lpfc_iocbq *elsiocb;
1292         struct lpfc_iocbq defer_flogi_acc;
1293         uint8_t *pcmd;
1294         uint16_t cmdsize;
1295         uint32_t tmo, did;
1296         int rc;
1297
1298         cmdsize = (sizeof(uint32_t) + sizeof(struct serv_parm));
1299         elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, retry, ndlp,
1300                                      ndlp->nlp_DID, ELS_CMD_FLOGI);
1301
1302         if (!elsiocb)
1303                 return 1;
1304
1305         icmd = &elsiocb->iocb;
1306         pcmd = (uint8_t *) (((struct lpfc_dmabuf *) elsiocb->context2)->virt);
1307
1308         /* For FLOGI request, remainder of payload is service parameters */
1309         *((uint32_t *) (pcmd)) = ELS_CMD_FLOGI;
1310         pcmd += sizeof(uint32_t);
1311         memcpy(pcmd, &vport->fc_sparam, sizeof(struct serv_parm));
1312         sp = (struct serv_parm *) pcmd;
1313
1314         /* Setup CSPs accordingly for Fabric */
1315         sp->cmn.e_d_tov = 0;
1316         sp->cmn.w2.r_a_tov = 0;
1317         sp->cmn.virtual_fabric_support = 0;
1318         sp->cls1.classValid = 0;
1319         if (sp->cmn.fcphLow < FC_PH3)
1320                 sp->cmn.fcphLow = FC_PH3;
1321         if (sp->cmn.fcphHigh < FC_PH3)
1322                 sp->cmn.fcphHigh = FC_PH3;
1323
1324         /* Determine if switch supports priority tagging */
1325         if (phba->cfg_vmid_priority_tagging) {
1326                 sp->cmn.priority_tagging = 1;
1327                 /* lpfc_vmid_host_uuid is combination of wwpn and wwnn */
1328                 if (uuid_is_null((uuid_t *)vport->lpfc_vmid_host_uuid)) {
1329                         memcpy(vport->lpfc_vmid_host_uuid, phba->wwpn,
1330                                sizeof(phba->wwpn));
1331                         memcpy(&vport->lpfc_vmid_host_uuid[8], phba->wwnn,
1332                                sizeof(phba->wwnn));
1333                 }
1334         }
1335
1336         if  (phba->sli_rev == LPFC_SLI_REV4) {
1337                 if (bf_get(lpfc_sli_intf_if_type, &phba->sli4_hba.sli_intf) ==
1338                     LPFC_SLI_INTF_IF_TYPE_0) {
1339                         elsiocb->iocb.ulpCt_h = ((SLI4_CT_FCFI >> 1) & 1);
1340                         elsiocb->iocb.ulpCt_l = (SLI4_CT_FCFI & 1);
1341                         /* FLOGI needs to be 3 for WQE FCFI */
1342                         /* Set the fcfi to the fcfi we registered with */
1343                         elsiocb->iocb.ulpContext = phba->fcf.fcfi;
1344                 }
1345                 /* Can't do SLI4 class2 without support sequence coalescing */
1346                 sp->cls2.classValid = 0;
1347                 sp->cls2.seqDelivery = 0;
1348         } else {
1349                 /* Historical, setting sequential-delivery bit for SLI3 */
1350                 sp->cls2.seqDelivery = (sp->cls2.classValid) ? 1 : 0;
1351                 sp->cls3.seqDelivery = (sp->cls3.classValid) ? 1 : 0;
1352                 if (phba->sli3_options & LPFC_SLI3_NPIV_ENABLED) {
1353                         sp->cmn.request_multiple_Nport = 1;
1354                         /* For FLOGI, Let FLOGI rsp set the NPortID for VPI 0 */
1355                         icmd->ulpCt_h = 1;
1356                         icmd->ulpCt_l = 0;
1357                 } else
1358                         sp->cmn.request_multiple_Nport = 0;
1359         }
1360
1361         if (phba->fc_topology != LPFC_TOPOLOGY_LOOP) {
1362                 icmd->un.elsreq64.myID = 0;
1363                 icmd->un.elsreq64.fl = 1;
1364         }
1365
1366         tmo = phba->fc_ratov;
1367         phba->fc_ratov = LPFC_DISC_FLOGI_TMO;
1368         lpfc_set_disctmo(vport);
1369         phba->fc_ratov = tmo;
1370
1371         phba->fc_stat.elsXmitFLOGI++;
1372         elsiocb->iocb_cmpl = lpfc_cmpl_els_flogi;
1373
1374         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
1375                 "Issue FLOGI:     opt:x%x",
1376                 phba->sli3_options, 0, 0);
1377
1378         elsiocb->context1 = lpfc_nlp_get(ndlp);
1379         if (!elsiocb->context1) {
1380                 lpfc_els_free_iocb(phba, elsiocb);
1381                 return 1;
1382         }
1383
1384         rc = lpfc_issue_fabric_iocb(phba, elsiocb);
1385         if (rc == IOCB_ERROR) {
1386                 lpfc_els_free_iocb(phba, elsiocb);
1387                 lpfc_nlp_put(ndlp);
1388                 return 1;
1389         }
1390
1391         phba->hba_flag |= (HBA_FLOGI_ISSUED | HBA_FLOGI_OUTSTANDING);
1392
1393         /* Check for a deferred FLOGI ACC condition */
1394         if (phba->defer_flogi_acc_flag) {
1395                 did = vport->fc_myDID;
1396                 vport->fc_myDID = Fabric_DID;
1397
1398                 memset(&defer_flogi_acc, 0, sizeof(struct lpfc_iocbq));
1399
1400                 defer_flogi_acc.iocb.ulpContext = phba->defer_flogi_acc_rx_id;
1401                 defer_flogi_acc.iocb.unsli3.rcvsli3.ox_id =
1402                                                 phba->defer_flogi_acc_ox_id;
1403
1404                 lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
1405                                  "3354 Xmit deferred FLOGI ACC: rx_id: x%x,"
1406                                  " ox_id: x%x, hba_flag x%x\n",
1407                                  phba->defer_flogi_acc_rx_id,
1408                                  phba->defer_flogi_acc_ox_id, phba->hba_flag);
1409
1410                 /* Send deferred FLOGI ACC */
1411                 lpfc_els_rsp_acc(vport, ELS_CMD_FLOGI, &defer_flogi_acc,
1412                                  ndlp, NULL);
1413
1414                 phba->defer_flogi_acc_flag = false;
1415
1416                 vport->fc_myDID = did;
1417         }
1418
1419         return 0;
1420 }
1421
1422 /**
1423  * lpfc_els_abort_flogi - Abort all outstanding flogi iocbs
1424  * @phba: pointer to lpfc hba data structure.
1425  *
1426  * This routine aborts all the outstanding Fabric Login (FLOGI) IOCBs
1427  * with a @phba. This routine walks all the outstanding IOCBs on the txcmplq
1428  * list and issues an abort IOCB commond on each outstanding IOCB that
1429  * contains a active Fabric_DID ndlp. Note that this function is to issue
1430  * the abort IOCB command on all the outstanding IOCBs, thus when this
1431  * function returns, it does not guarantee all the IOCBs are actually aborted.
1432  *
1433  * Return code
1434  *   0 - Successfully issued abort iocb on all outstanding flogis (Always 0)
1435  **/
1436 int
1437 lpfc_els_abort_flogi(struct lpfc_hba *phba)
1438 {
1439         struct lpfc_sli_ring *pring;
1440         struct lpfc_iocbq *iocb, *next_iocb;
1441         struct lpfc_nodelist *ndlp;
1442         IOCB_t *icmd;
1443
1444         /* Abort outstanding I/O on NPort <nlp_DID> */
1445         lpfc_printf_log(phba, KERN_INFO, LOG_DISCOVERY,
1446                         "0201 Abort outstanding I/O on NPort x%x\n",
1447                         Fabric_DID);
1448
1449         pring = lpfc_phba_elsring(phba);
1450         if (unlikely(!pring))
1451                 return -EIO;
1452
1453         /*
1454          * Check the txcmplq for an iocb that matches the nport the driver is
1455          * searching for.
1456          */
1457         spin_lock_irq(&phba->hbalock);
1458         list_for_each_entry_safe(iocb, next_iocb, &pring->txcmplq, list) {
1459                 icmd = &iocb->iocb;
1460                 if (icmd->ulpCommand == CMD_ELS_REQUEST64_CR) {
1461                         ndlp = (struct lpfc_nodelist *)(iocb->context1);
1462                         if (ndlp && ndlp->nlp_DID == Fabric_DID) {
1463                                 if ((phba->pport->fc_flag & FC_PT2PT) &&
1464                                     !(phba->pport->fc_flag & FC_PT2PT_PLOGI))
1465                                         iocb->fabric_iocb_cmpl =
1466                                                 lpfc_ignore_els_cmpl;
1467                                 lpfc_sli_issue_abort_iotag(phba, pring, iocb,
1468                                                            NULL);
1469                         }
1470                 }
1471         }
1472         /* Make sure HBA is alive */
1473         lpfc_issue_hb_tmo(phba);
1474
1475         spin_unlock_irq(&phba->hbalock);
1476
1477         return 0;
1478 }
1479
1480 /**
1481  * lpfc_initial_flogi - Issue an initial fabric login for a vport
1482  * @vport: pointer to a host virtual N_Port data structure.
1483  *
1484  * This routine issues an initial Fabric Login (FLOGI) for the @vport
1485  * specified. It first searches the ndlp with the Fabric_DID (0xfffffe) from
1486  * the @vport's ndlp list. If no such ndlp found, it will create an ndlp and
1487  * put it into the @vport's ndlp list. If an inactive ndlp found on the list,
1488  * it will just be enabled and made active. The lpfc_issue_els_flogi() routine
1489  * is then invoked with the @vport and the ndlp to perform the FLOGI for the
1490  * @vport.
1491  *
1492  * Return code
1493  *   0 - failed to issue initial flogi for @vport
1494  *   1 - successfully issued initial flogi for @vport
1495  **/
1496 int
1497 lpfc_initial_flogi(struct lpfc_vport *vport)
1498 {
1499         struct lpfc_nodelist *ndlp;
1500
1501         vport->port_state = LPFC_FLOGI;
1502         lpfc_set_disctmo(vport);
1503
1504         /* First look for the Fabric ndlp */
1505         ndlp = lpfc_findnode_did(vport, Fabric_DID);
1506         if (!ndlp) {
1507                 /* Cannot find existing Fabric ndlp, so allocate a new one */
1508                 ndlp = lpfc_nlp_init(vport, Fabric_DID);
1509                 if (!ndlp)
1510                         return 0;
1511                 /* Set the node type */
1512                 ndlp->nlp_type |= NLP_FABRIC;
1513
1514                 /* Put ndlp onto node list */
1515                 lpfc_enqueue_node(vport, ndlp);
1516         }
1517
1518         if (lpfc_issue_els_flogi(vport, ndlp, 0)) {
1519                 /* This decrement of reference count to node shall kick off
1520                  * the release of the node.
1521                  */
1522                 lpfc_nlp_put(ndlp);
1523                 return 0;
1524         }
1525         return 1;
1526 }
1527
1528 /**
1529  * lpfc_initial_fdisc - Issue an initial fabric discovery for a vport
1530  * @vport: pointer to a host virtual N_Port data structure.
1531  *
1532  * This routine issues an initial Fabric Discover (FDISC) for the @vport
1533  * specified. It first searches the ndlp with the Fabric_DID (0xfffffe) from
1534  * the @vport's ndlp list. If no such ndlp found, it will create an ndlp and
1535  * put it into the @vport's ndlp list. If an inactive ndlp found on the list,
1536  * it will just be enabled and made active. The lpfc_issue_els_fdisc() routine
1537  * is then invoked with the @vport and the ndlp to perform the FDISC for the
1538  * @vport.
1539  *
1540  * Return code
1541  *   0 - failed to issue initial fdisc for @vport
1542  *   1 - successfully issued initial fdisc for @vport
1543  **/
1544 int
1545 lpfc_initial_fdisc(struct lpfc_vport *vport)
1546 {
1547         struct lpfc_nodelist *ndlp;
1548
1549         /* First look for the Fabric ndlp */
1550         ndlp = lpfc_findnode_did(vport, Fabric_DID);
1551         if (!ndlp) {
1552                 /* Cannot find existing Fabric ndlp, so allocate a new one */
1553                 ndlp = lpfc_nlp_init(vport, Fabric_DID);
1554                 if (!ndlp)
1555                         return 0;
1556
1557                 /* NPIV is only supported in Fabrics. */
1558                 ndlp->nlp_type |= NLP_FABRIC;
1559
1560                 /* Put ndlp onto node list */
1561                 lpfc_enqueue_node(vport, ndlp);
1562         }
1563
1564         if (lpfc_issue_els_fdisc(vport, ndlp, 0)) {
1565                 /* decrement node reference count to trigger the release of
1566                  * the node.
1567                  */
1568                 lpfc_nlp_put(ndlp);
1569                 return 0;
1570         }
1571         return 1;
1572 }
1573
1574 /**
1575  * lpfc_more_plogi - Check and issue remaining plogis for a vport
1576  * @vport: pointer to a host virtual N_Port data structure.
1577  *
1578  * This routine checks whether there are more remaining Port Logins
1579  * (PLOGI) to be issued for the @vport. If so, it will invoke the routine
1580  * lpfc_els_disc_plogi() to go through the Node Port Recovery (NPR) nodes
1581  * to issue ELS PLOGIs up to the configured discover threads with the
1582  * @vport (@vport->cfg_discovery_threads). The function also decrement
1583  * the @vport's num_disc_node by 1 if it is not already 0.
1584  **/
1585 void
1586 lpfc_more_plogi(struct lpfc_vport *vport)
1587 {
1588         if (vport->num_disc_nodes)
1589                 vport->num_disc_nodes--;
1590
1591         /* Continue discovery with <num_disc_nodes> PLOGIs to go */
1592         lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
1593                          "0232 Continue discovery with %d PLOGIs to go "
1594                          "Data: x%x x%x x%x\n",
1595                          vport->num_disc_nodes, vport->fc_plogi_cnt,
1596                          vport->fc_flag, vport->port_state);
1597         /* Check to see if there are more PLOGIs to be sent */
1598         if (vport->fc_flag & FC_NLP_MORE)
1599                 /* go thru NPR nodes and issue any remaining ELS PLOGIs */
1600                 lpfc_els_disc_plogi(vport);
1601
1602         return;
1603 }
1604
1605 /**
1606  * lpfc_plogi_confirm_nport - Confirm plogi wwpn matches stored ndlp
1607  * @phba: pointer to lpfc hba data structure.
1608  * @prsp: pointer to response IOCB payload.
1609  * @ndlp: pointer to a node-list data structure.
1610  *
1611  * This routine checks and indicates whether the WWPN of an N_Port, retrieved
1612  * from a PLOGI, matches the WWPN that is stored in the @ndlp for that N_POrt.
1613  * The following cases are considered N_Port confirmed:
1614  * 1) The N_Port is a Fabric ndlp; 2) The @ndlp is on vport list and matches
1615  * the WWPN of the N_Port logged into; 3) The @ndlp is not on vport list but
1616  * it does not have WWPN assigned either. If the WWPN is confirmed, the
1617  * pointer to the @ndlp will be returned. If the WWPN is not confirmed:
1618  * 1) if there is a node on vport list other than the @ndlp with the same
1619  * WWPN of the N_Port PLOGI logged into, the lpfc_unreg_rpi() will be invoked
1620  * on that node to release the RPI associated with the node; 2) if there is
1621  * no node found on vport list with the same WWPN of the N_Port PLOGI logged
1622  * into, a new node shall be allocated (or activated). In either case, the
1623  * parameters of the @ndlp shall be copied to the new_ndlp, the @ndlp shall
1624  * be released and the new_ndlp shall be put on to the vport node list and
1625  * its pointer returned as the confirmed node.
1626  *
1627  * Note that before the @ndlp got "released", the keepDID from not-matching
1628  * or inactive "new_ndlp" on the vport node list is assigned to the nlp_DID
1629  * of the @ndlp. This is because the release of @ndlp is actually to put it
1630  * into an inactive state on the vport node list and the vport node list
1631  * management algorithm does not allow two node with a same DID.
1632  *
1633  * Return code
1634  *   pointer to the PLOGI N_Port @ndlp
1635  **/
1636 static struct lpfc_nodelist *
1637 lpfc_plogi_confirm_nport(struct lpfc_hba *phba, uint32_t *prsp,
1638                          struct lpfc_nodelist *ndlp)
1639 {
1640         struct lpfc_vport *vport = ndlp->vport;
1641         struct lpfc_nodelist *new_ndlp;
1642         struct serv_parm *sp;
1643         uint8_t  name[sizeof(struct lpfc_name)];
1644         uint32_t keepDID = 0, keep_nlp_flag = 0;
1645         uint32_t keep_new_nlp_flag = 0;
1646         uint16_t keep_nlp_state;
1647         u32 keep_nlp_fc4_type = 0;
1648         struct lpfc_nvme_rport *keep_nrport = NULL;
1649         unsigned long *active_rrqs_xri_bitmap = NULL;
1650
1651         /* Fabric nodes can have the same WWPN so we don't bother searching
1652          * by WWPN.  Just return the ndlp that was given to us.
1653          */
1654         if (ndlp->nlp_type & NLP_FABRIC)
1655                 return ndlp;
1656
1657         sp = (struct serv_parm *) ((uint8_t *) prsp + sizeof(uint32_t));
1658         memset(name, 0, sizeof(struct lpfc_name));
1659
1660         /* Now we find out if the NPort we are logging into, matches the WWPN
1661          * we have for that ndlp. If not, we have some work to do.
1662          */
1663         new_ndlp = lpfc_findnode_wwpn(vport, &sp->portName);
1664
1665         /* return immediately if the WWPN matches ndlp */
1666         if (!new_ndlp || (new_ndlp == ndlp))
1667                 return ndlp;
1668
1669         /*
1670          * Unregister from backend if not done yet. Could have been skipped
1671          * due to ADISC
1672          */
1673         lpfc_nlp_unreg_node(vport, new_ndlp);
1674
1675         if (phba->sli_rev == LPFC_SLI_REV4) {
1676                 active_rrqs_xri_bitmap = mempool_alloc(phba->active_rrq_pool,
1677                                                        GFP_KERNEL);
1678                 if (active_rrqs_xri_bitmap)
1679                         memset(active_rrqs_xri_bitmap, 0,
1680                                phba->cfg_rrq_xri_bitmap_sz);
1681         }
1682
1683         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS | LOG_NODE,
1684                          "3178 PLOGI confirm: ndlp x%x x%x x%x: "
1685                          "new_ndlp x%x x%x x%x\n",
1686                          ndlp->nlp_DID, ndlp->nlp_flag,  ndlp->nlp_fc4_type,
1687                          (new_ndlp ? new_ndlp->nlp_DID : 0),
1688                          (new_ndlp ? new_ndlp->nlp_flag : 0),
1689                          (new_ndlp ? new_ndlp->nlp_fc4_type : 0));
1690
1691         keepDID = new_ndlp->nlp_DID;
1692
1693         if (phba->sli_rev == LPFC_SLI_REV4 && active_rrqs_xri_bitmap)
1694                 memcpy(active_rrqs_xri_bitmap, new_ndlp->active_rrqs_xri_bitmap,
1695                        phba->cfg_rrq_xri_bitmap_sz);
1696
1697         /* At this point in this routine, we know new_ndlp will be
1698          * returned. however, any previous GID_FTs that were done
1699          * would have updated nlp_fc4_type in ndlp, so we must ensure
1700          * new_ndlp has the right value.
1701          */
1702         if (vport->fc_flag & FC_FABRIC) {
1703                 keep_nlp_fc4_type = new_ndlp->nlp_fc4_type;
1704                 new_ndlp->nlp_fc4_type = ndlp->nlp_fc4_type;
1705         }
1706
1707         lpfc_unreg_rpi(vport, new_ndlp);
1708         new_ndlp->nlp_DID = ndlp->nlp_DID;
1709         new_ndlp->nlp_prev_state = ndlp->nlp_prev_state;
1710         if (phba->sli_rev == LPFC_SLI_REV4)
1711                 memcpy(new_ndlp->active_rrqs_xri_bitmap,
1712                        ndlp->active_rrqs_xri_bitmap,
1713                        phba->cfg_rrq_xri_bitmap_sz);
1714
1715         /* Lock both ndlps */
1716         spin_lock_irq(&ndlp->lock);
1717         spin_lock_irq(&new_ndlp->lock);
1718         keep_new_nlp_flag = new_ndlp->nlp_flag;
1719         keep_nlp_flag = ndlp->nlp_flag;
1720         new_ndlp->nlp_flag = ndlp->nlp_flag;
1721
1722         /* if new_ndlp had NLP_UNREG_INP set, keep it */
1723         if (keep_new_nlp_flag & NLP_UNREG_INP)
1724                 new_ndlp->nlp_flag |= NLP_UNREG_INP;
1725         else
1726                 new_ndlp->nlp_flag &= ~NLP_UNREG_INP;
1727
1728         /* if new_ndlp had NLP_RPI_REGISTERED set, keep it */
1729         if (keep_new_nlp_flag & NLP_RPI_REGISTERED)
1730                 new_ndlp->nlp_flag |= NLP_RPI_REGISTERED;
1731         else
1732                 new_ndlp->nlp_flag &= ~NLP_RPI_REGISTERED;
1733
1734         /*
1735          * Retain the DROPPED flag. This will take care of the init
1736          * refcount when affecting the state change
1737          */
1738         if (keep_new_nlp_flag & NLP_DROPPED)
1739                 new_ndlp->nlp_flag |= NLP_DROPPED;
1740         else
1741                 new_ndlp->nlp_flag &= ~NLP_DROPPED;
1742
1743         ndlp->nlp_flag = keep_new_nlp_flag;
1744
1745         /* if ndlp had NLP_UNREG_INP set, keep it */
1746         if (keep_nlp_flag & NLP_UNREG_INP)
1747                 ndlp->nlp_flag |= NLP_UNREG_INP;
1748         else
1749                 ndlp->nlp_flag &= ~NLP_UNREG_INP;
1750
1751         /* if ndlp had NLP_RPI_REGISTERED set, keep it */
1752         if (keep_nlp_flag & NLP_RPI_REGISTERED)
1753                 ndlp->nlp_flag |= NLP_RPI_REGISTERED;
1754         else
1755                 ndlp->nlp_flag &= ~NLP_RPI_REGISTERED;
1756
1757         /*
1758          * Retain the DROPPED flag. This will take care of the init
1759          * refcount when affecting the state change
1760          */
1761         if (keep_nlp_flag & NLP_DROPPED)
1762                 ndlp->nlp_flag |= NLP_DROPPED;
1763         else
1764                 ndlp->nlp_flag &= ~NLP_DROPPED;
1765
1766         spin_unlock_irq(&new_ndlp->lock);
1767         spin_unlock_irq(&ndlp->lock);
1768
1769         /* Set nlp_states accordingly */
1770         keep_nlp_state = new_ndlp->nlp_state;
1771         lpfc_nlp_set_state(vport, new_ndlp, ndlp->nlp_state);
1772
1773         /* interchange the nvme remoteport structs */
1774         keep_nrport = new_ndlp->nrport;
1775         new_ndlp->nrport = ndlp->nrport;
1776
1777         /* Move this back to NPR state */
1778         if (memcmp(&ndlp->nlp_portname, name, sizeof(struct lpfc_name)) == 0) {
1779                 /* The new_ndlp is replacing ndlp totally, so we need
1780                  * to put ndlp on UNUSED list and try to free it.
1781                  */
1782                 lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
1783                          "3179 PLOGI confirm NEW: %x %x\n",
1784                          new_ndlp->nlp_DID, keepDID);
1785
1786                 /* Two ndlps cannot have the same did on the nodelist.
1787                  * Note: for this case, ndlp has a NULL WWPN so setting
1788                  * the nlp_fc4_type isn't required.
1789                  */
1790                 ndlp->nlp_DID = keepDID;
1791                 lpfc_nlp_set_state(vport, ndlp, keep_nlp_state);
1792                 if (phba->sli_rev == LPFC_SLI_REV4 &&
1793                     active_rrqs_xri_bitmap)
1794                         memcpy(ndlp->active_rrqs_xri_bitmap,
1795                                active_rrqs_xri_bitmap,
1796                                phba->cfg_rrq_xri_bitmap_sz);
1797
1798         } else {
1799                 lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
1800                          "3180 PLOGI confirm SWAP: %x %x\n",
1801                          new_ndlp->nlp_DID, keepDID);
1802
1803                 lpfc_unreg_rpi(vport, ndlp);
1804
1805                 /* Two ndlps cannot have the same did and the fc4
1806                  * type must be transferred because the ndlp is in
1807                  * flight.
1808                  */
1809                 ndlp->nlp_DID = keepDID;
1810                 ndlp->nlp_fc4_type = keep_nlp_fc4_type;
1811
1812                 if (phba->sli_rev == LPFC_SLI_REV4 &&
1813                     active_rrqs_xri_bitmap)
1814                         memcpy(ndlp->active_rrqs_xri_bitmap,
1815                                active_rrqs_xri_bitmap,
1816                                phba->cfg_rrq_xri_bitmap_sz);
1817
1818                 /* Since we are switching over to the new_ndlp,
1819                  * reset the old ndlp state
1820                  */
1821                 if ((ndlp->nlp_state == NLP_STE_UNMAPPED_NODE) ||
1822                     (ndlp->nlp_state == NLP_STE_MAPPED_NODE))
1823                         keep_nlp_state = NLP_STE_NPR_NODE;
1824                 lpfc_nlp_set_state(vport, ndlp, keep_nlp_state);
1825                 ndlp->nrport = keep_nrport;
1826         }
1827
1828         /*
1829          * If ndlp is not associated with any rport we can drop it here else
1830          * let dev_loss_tmo_callbk trigger DEVICE_RM event
1831          */
1832         if (!ndlp->rport && (ndlp->nlp_state == NLP_STE_NPR_NODE))
1833                 lpfc_disc_state_machine(vport, ndlp, NULL, NLP_EVT_DEVICE_RM);
1834
1835         if (phba->sli_rev == LPFC_SLI_REV4 &&
1836             active_rrqs_xri_bitmap)
1837                 mempool_free(active_rrqs_xri_bitmap,
1838                              phba->active_rrq_pool);
1839
1840         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS | LOG_NODE,
1841                          "3173 PLOGI confirm exit: new_ndlp x%x x%x x%x\n",
1842                          new_ndlp->nlp_DID, new_ndlp->nlp_flag,
1843                          new_ndlp->nlp_fc4_type);
1844
1845         return new_ndlp;
1846 }
1847
1848 /**
1849  * lpfc_end_rscn - Check and handle more rscn for a vport
1850  * @vport: pointer to a host virtual N_Port data structure.
1851  *
1852  * This routine checks whether more Registration State Change
1853  * Notifications (RSCNs) came in while the discovery state machine was in
1854  * the FC_RSCN_MODE. If so, the lpfc_els_handle_rscn() routine will be
1855  * invoked to handle the additional RSCNs for the @vport. Otherwise, the
1856  * FC_RSCN_MODE bit will be cleared with the @vport to mark as the end of
1857  * handling the RSCNs.
1858  **/
1859 void
1860 lpfc_end_rscn(struct lpfc_vport *vport)
1861 {
1862         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1863
1864         if (vport->fc_flag & FC_RSCN_MODE) {
1865                 /*
1866                  * Check to see if more RSCNs came in while we were
1867                  * processing this one.
1868                  */
1869                 if (vport->fc_rscn_id_cnt ||
1870                     (vport->fc_flag & FC_RSCN_DISCOVERY) != 0)
1871                         lpfc_els_handle_rscn(vport);
1872                 else {
1873                         spin_lock_irq(shost->host_lock);
1874                         vport->fc_flag &= ~FC_RSCN_MODE;
1875                         spin_unlock_irq(shost->host_lock);
1876                 }
1877         }
1878 }
1879
1880 /**
1881  * lpfc_cmpl_els_rrq - Completion handled for els RRQs.
1882  * @phba: pointer to lpfc hba data structure.
1883  * @cmdiocb: pointer to lpfc command iocb data structure.
1884  * @rspiocb: pointer to lpfc response iocb data structure.
1885  *
1886  * This routine will call the clear rrq function to free the rrq and
1887  * clear the xri's bit in the ndlp's xri_bitmap. If the ndlp does not
1888  * exist then the clear_rrq is still called because the rrq needs to
1889  * be freed.
1890  **/
1891
1892 static void
1893 lpfc_cmpl_els_rrq(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
1894                     struct lpfc_iocbq *rspiocb)
1895 {
1896         struct lpfc_vport *vport = cmdiocb->vport;
1897         IOCB_t *irsp;
1898         struct lpfc_nodelist *ndlp = cmdiocb->context1;
1899         struct lpfc_node_rrq *rrq;
1900
1901         /* we pass cmdiocb to state machine which needs rspiocb as well */
1902         rrq = cmdiocb->context_un.rrq;
1903         cmdiocb->context_un.rsp_iocb = rspiocb;
1904
1905         irsp = &rspiocb->iocb;
1906         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
1907                 "RRQ cmpl:      status:x%x/x%x did:x%x",
1908                 irsp->ulpStatus, irsp->un.ulpWord[4],
1909                 irsp->un.elsreq64.remoteID);
1910
1911         /* rrq completes to NPort <nlp_DID> */
1912         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
1913                          "2880 RRQ completes to DID x%x "
1914                          "Data: x%x x%x x%x x%x x%x\n",
1915                          irsp->un.elsreq64.remoteID,
1916                          irsp->ulpStatus, irsp->un.ulpWord[4],
1917                          irsp->ulpTimeout, rrq->xritag, rrq->rxid);
1918
1919         if (irsp->ulpStatus) {
1920                 /* Check for retry */
1921                 /* RRQ failed Don't print the vport to vport rjts */
1922                 if (irsp->ulpStatus != IOSTAT_LS_RJT ||
1923                         (((irsp->un.ulpWord[4]) >> 16 != LSRJT_INVALID_CMD) &&
1924                         ((irsp->un.ulpWord[4]) >> 16 != LSRJT_UNABLE_TPC)) ||
1925                         (phba)->pport->cfg_log_verbose & LOG_ELS)
1926                         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
1927                                          "2881 RRQ failure DID:%06X Status:"
1928                                          "x%x/x%x\n",
1929                                          ndlp->nlp_DID, irsp->ulpStatus,
1930                                          irsp->un.ulpWord[4]);
1931         }
1932
1933         lpfc_clr_rrq_active(phba, rrq->xritag, rrq);
1934         lpfc_els_free_iocb(phba, cmdiocb);
1935         lpfc_nlp_put(ndlp);
1936         return;
1937 }
1938 /**
1939  * lpfc_cmpl_els_plogi - Completion callback function for plogi
1940  * @phba: pointer to lpfc hba data structure.
1941  * @cmdiocb: pointer to lpfc command iocb data structure.
1942  * @rspiocb: pointer to lpfc response iocb data structure.
1943  *
1944  * This routine is the completion callback function for issuing the Port
1945  * Login (PLOGI) command. For PLOGI completion, there must be an active
1946  * ndlp on the vport node list that matches the remote node ID from the
1947  * PLOGI response IOCB. If such ndlp does not exist, the PLOGI is simply
1948  * ignored and command IOCB released. The PLOGI response IOCB status is
1949  * checked for error conditions. If there is error status reported, PLOGI
1950  * retry shall be attempted by invoking the lpfc_els_retry() routine.
1951  * Otherwise, the lpfc_plogi_confirm_nport() routine shall be invoked on
1952  * the ndlp and the NLP_EVT_CMPL_PLOGI state to the Discover State Machine
1953  * (DSM) is set for this PLOGI completion. Finally, it checks whether
1954  * there are additional N_Port nodes with the vport that need to perform
1955  * PLOGI. If so, the lpfc_more_plogi() routine is invoked to issue addition
1956  * PLOGIs.
1957  **/
1958 static void
1959 lpfc_cmpl_els_plogi(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
1960                     struct lpfc_iocbq *rspiocb)
1961 {
1962         struct lpfc_vport *vport = cmdiocb->vport;
1963         struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
1964         IOCB_t *irsp;
1965         struct lpfc_nodelist *ndlp, *free_ndlp;
1966         struct lpfc_dmabuf *prsp;
1967         int disc;
1968         struct serv_parm *sp = NULL;
1969
1970         /* we pass cmdiocb to state machine which needs rspiocb as well */
1971         cmdiocb->context_un.rsp_iocb = rspiocb;
1972
1973         irsp = &rspiocb->iocb;
1974         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
1975                 "PLOGI cmpl:      status:x%x/x%x did:x%x",
1976                 irsp->ulpStatus, irsp->un.ulpWord[4],
1977                 irsp->un.elsreq64.remoteID);
1978
1979         ndlp = lpfc_findnode_did(vport, irsp->un.elsreq64.remoteID);
1980         if (!ndlp) {
1981                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
1982                                  "0136 PLOGI completes to NPort x%x "
1983                                  "with no ndlp. Data: x%x x%x x%x\n",
1984                                  irsp->un.elsreq64.remoteID,
1985                                  irsp->ulpStatus, irsp->un.ulpWord[4],
1986                                  irsp->ulpIoTag);
1987                 goto out_freeiocb;
1988         }
1989
1990         /* Since ndlp can be freed in the disc state machine, note if this node
1991          * is being used during discovery.
1992          */
1993         spin_lock_irq(&ndlp->lock);
1994         disc = (ndlp->nlp_flag & NLP_NPR_2B_DISC);
1995         ndlp->nlp_flag &= ~NLP_NPR_2B_DISC;
1996         spin_unlock_irq(&ndlp->lock);
1997
1998         /* PLOGI completes to NPort <nlp_DID> */
1999         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
2000                          "0102 PLOGI completes to NPort x%06x "
2001                          "Data: x%x x%x x%x x%x x%x\n",
2002                          ndlp->nlp_DID, ndlp->nlp_fc4_type,
2003                          irsp->ulpStatus, irsp->un.ulpWord[4],
2004                          disc, vport->num_disc_nodes);
2005
2006         /* Check to see if link went down during discovery */
2007         if (lpfc_els_chk_latt(vport)) {
2008                 spin_lock_irq(&ndlp->lock);
2009                 ndlp->nlp_flag |= NLP_NPR_2B_DISC;
2010                 spin_unlock_irq(&ndlp->lock);
2011                 goto out;
2012         }
2013
2014         if (irsp->ulpStatus) {
2015                 /* Check for retry */
2016                 if (lpfc_els_retry(phba, cmdiocb, rspiocb)) {
2017                         /* ELS command is being retried */
2018                         if (disc) {
2019                                 spin_lock_irq(&ndlp->lock);
2020                                 ndlp->nlp_flag |= NLP_NPR_2B_DISC;
2021                                 spin_unlock_irq(&ndlp->lock);
2022                         }
2023                         goto out;
2024                 }
2025                 /* PLOGI failed Don't print the vport to vport rjts */
2026                 if (irsp->ulpStatus != IOSTAT_LS_RJT ||
2027                         (((irsp->un.ulpWord[4]) >> 16 != LSRJT_INVALID_CMD) &&
2028                         ((irsp->un.ulpWord[4]) >> 16 != LSRJT_UNABLE_TPC)) ||
2029                         (phba)->pport->cfg_log_verbose & LOG_ELS)
2030                         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
2031                                  "2753 PLOGI failure DID:%06X Status:x%x/x%x\n",
2032                                  ndlp->nlp_DID, irsp->ulpStatus,
2033                                  irsp->un.ulpWord[4]);
2034
2035                 /* Do not call DSM for lpfc_els_abort'ed ELS cmds */
2036                 if (!lpfc_error_lost_link(irsp))
2037                         lpfc_disc_state_machine(vport, ndlp, cmdiocb,
2038                                                 NLP_EVT_CMPL_PLOGI);
2039
2040                 /* If a PLOGI collision occurred, the node needs to continue
2041                  * with the reglogin process.
2042                  */
2043                 spin_lock_irq(&ndlp->lock);
2044                 if ((ndlp->nlp_flag & (NLP_ACC_REGLOGIN | NLP_RCV_PLOGI)) &&
2045                     ndlp->nlp_state == NLP_STE_REG_LOGIN_ISSUE) {
2046                         spin_unlock_irq(&ndlp->lock);
2047                         goto out;
2048                 }
2049                 spin_unlock_irq(&ndlp->lock);
2050
2051                 /* No PLOGI collision and the node is not registered with the
2052                  * scsi or nvme transport. It is no longer an active node. Just
2053                  * start the device remove process.
2054                  */
2055                 if (!(ndlp->fc4_xpt_flags & (SCSI_XPT_REGD | NVME_XPT_REGD))) {
2056                         spin_lock_irq(&ndlp->lock);
2057                         ndlp->nlp_flag &= ~NLP_NPR_2B_DISC;
2058                         spin_unlock_irq(&ndlp->lock);
2059                         lpfc_disc_state_machine(vport, ndlp, cmdiocb,
2060                                                 NLP_EVT_DEVICE_RM);
2061                 }
2062         } else {
2063                 /* Good status, call state machine */
2064                 prsp = list_entry(((struct lpfc_dmabuf *)
2065                                    cmdiocb->context2)->list.next,
2066                                   struct lpfc_dmabuf, list);
2067                 ndlp = lpfc_plogi_confirm_nport(phba, prsp->virt, ndlp);
2068
2069                 sp = (struct serv_parm *)((u8 *)prsp->virt +
2070                                           sizeof(u32));
2071
2072                 ndlp->vmid_support = 0;
2073                 if ((phba->cfg_vmid_app_header && sp->cmn.app_hdr_support) ||
2074                     (phba->cfg_vmid_priority_tagging &&
2075                      sp->cmn.priority_tagging)) {
2076                         lpfc_printf_log(phba, KERN_DEBUG, LOG_ELS,
2077                                         "4018 app_hdr_support %d tagging %d DID x%x\n",
2078                                         sp->cmn.app_hdr_support,
2079                                         sp->cmn.priority_tagging,
2080                                         ndlp->nlp_DID);
2081                         /* if the dest port supports VMID, mark it in ndlp */
2082                         ndlp->vmid_support = 1;
2083                 }
2084
2085                 lpfc_disc_state_machine(vport, ndlp, cmdiocb,
2086                                         NLP_EVT_CMPL_PLOGI);
2087         }
2088
2089         if (disc && vport->num_disc_nodes) {
2090                 /* Check to see if there are more PLOGIs to be sent */
2091                 lpfc_more_plogi(vport);
2092
2093                 if (vport->num_disc_nodes == 0) {
2094                         spin_lock_irq(shost->host_lock);
2095                         vport->fc_flag &= ~FC_NDISC_ACTIVE;
2096                         spin_unlock_irq(shost->host_lock);
2097
2098                         lpfc_can_disctmo(vport);
2099                         lpfc_end_rscn(vport);
2100                 }
2101         }
2102
2103 out:
2104         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_NODE,
2105                               "PLOGI Cmpl PUT:     did:x%x refcnt %d",
2106                               ndlp->nlp_DID, kref_read(&ndlp->kref), 0);
2107
2108 out_freeiocb:
2109         /* Release the reference on the original I/O request. */
2110         free_ndlp = (struct lpfc_nodelist *)cmdiocb->context1;
2111
2112         lpfc_els_free_iocb(phba, cmdiocb);
2113         lpfc_nlp_put(free_ndlp);
2114         return;
2115 }
2116
2117 /**
2118  * lpfc_issue_els_plogi - Issue an plogi iocb command for a vport
2119  * @vport: pointer to a host virtual N_Port data structure.
2120  * @did: destination port identifier.
2121  * @retry: number of retries to the command IOCB.
2122  *
2123  * This routine issues a Port Login (PLOGI) command to a remote N_Port
2124  * (with the @did) for a @vport. Before issuing a PLOGI to a remote N_Port,
2125  * the ndlp with the remote N_Port DID must exist on the @vport's ndlp list.
2126  * This routine constructs the proper fields of the PLOGI IOCB and invokes
2127  * the lpfc_sli_issue_iocb() routine to send out PLOGI ELS command.
2128  *
2129  * Note that the ndlp reference count will be incremented by 1 for holding
2130  * the ndlp and the reference to ndlp will be stored into the context1 field
2131  * of the IOCB for the completion callback function to the PLOGI ELS command.
2132  *
2133  * Return code
2134  *   0 - Successfully issued a plogi for @vport
2135  *   1 - failed to issue a plogi for @vport
2136  **/
2137 int
2138 lpfc_issue_els_plogi(struct lpfc_vport *vport, uint32_t did, uint8_t retry)
2139 {
2140         struct lpfc_hba  *phba = vport->phba;
2141         struct serv_parm *sp;
2142         struct lpfc_nodelist *ndlp;
2143         struct lpfc_iocbq *elsiocb;
2144         uint8_t *pcmd;
2145         uint16_t cmdsize;
2146         int ret;
2147
2148         ndlp = lpfc_findnode_did(vport, did);
2149         if (!ndlp)
2150                 return 1;
2151
2152         /* Defer the processing of the issue PLOGI until after the
2153          * outstanding UNREG_RPI mbox command completes, unless we
2154          * are going offline. This logic does not apply for Fabric DIDs
2155          */
2156         if ((ndlp->nlp_flag & NLP_UNREG_INP) &&
2157             ((ndlp->nlp_DID & Fabric_DID_MASK) != Fabric_DID_MASK) &&
2158             !(vport->fc_flag & FC_OFFLINE_MODE)) {
2159                 lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
2160                                  "4110 Issue PLOGI x%x deferred "
2161                                  "on NPort x%x rpi x%x Data: x%px\n",
2162                                  ndlp->nlp_defer_did, ndlp->nlp_DID,
2163                                  ndlp->nlp_rpi, ndlp);
2164
2165                 /* We can only defer 1st PLOGI */
2166                 if (ndlp->nlp_defer_did == NLP_EVT_NOTHING_PENDING)
2167                         ndlp->nlp_defer_did = did;
2168                 return 0;
2169         }
2170
2171         cmdsize = (sizeof(uint32_t) + sizeof(struct serv_parm));
2172         elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, retry, ndlp, did,
2173                                      ELS_CMD_PLOGI);
2174         if (!elsiocb)
2175                 return 1;
2176
2177         spin_lock_irq(&ndlp->lock);
2178         ndlp->nlp_flag &= ~NLP_FCP_PRLI_RJT;
2179         spin_unlock_irq(&ndlp->lock);
2180
2181         pcmd = (uint8_t *) (((struct lpfc_dmabuf *) elsiocb->context2)->virt);
2182
2183         /* For PLOGI request, remainder of payload is service parameters */
2184         *((uint32_t *) (pcmd)) = ELS_CMD_PLOGI;
2185         pcmd += sizeof(uint32_t);
2186         memcpy(pcmd, &vport->fc_sparam, sizeof(struct serv_parm));
2187         sp = (struct serv_parm *) pcmd;
2188
2189         /*
2190          * If we are a N-port connected to a Fabric, fix-up paramm's so logins
2191          * to device on remote loops work.
2192          */
2193         if ((vport->fc_flag & FC_FABRIC) && !(vport->fc_flag & FC_PUBLIC_LOOP))
2194                 sp->cmn.altBbCredit = 1;
2195
2196         if (sp->cmn.fcphLow < FC_PH_4_3)
2197                 sp->cmn.fcphLow = FC_PH_4_3;
2198
2199         if (sp->cmn.fcphHigh < FC_PH3)
2200                 sp->cmn.fcphHigh = FC_PH3;
2201
2202         sp->cmn.valid_vendor_ver_level = 0;
2203         memset(sp->un.vendorVersion, 0, sizeof(sp->un.vendorVersion));
2204         sp->cmn.bbRcvSizeMsb &= 0xF;
2205
2206         /* Check if the destination port supports VMID */
2207         ndlp->vmid_support = 0;
2208         if (vport->vmid_priority_tagging)
2209                 sp->cmn.priority_tagging = 1;
2210         else if (phba->cfg_vmid_app_header &&
2211                  bf_get(lpfc_ftr_ashdr, &phba->sli4_hba.sli4_flags))
2212                 sp->cmn.app_hdr_support = 1;
2213
2214         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
2215                 "Issue PLOGI:     did:x%x",
2216                 did, 0, 0);
2217
2218         /* If our firmware supports this feature, convey that
2219          * information to the target using the vendor specific field.
2220          */
2221         if (phba->sli.sli_flag & LPFC_SLI_SUPPRESS_RSP) {
2222                 sp->cmn.valid_vendor_ver_level = 1;
2223                 sp->un.vv.vid = cpu_to_be32(LPFC_VV_EMLX_ID);
2224                 sp->un.vv.flags = cpu_to_be32(LPFC_VV_SUPPRESS_RSP);
2225         }
2226
2227         phba->fc_stat.elsXmitPLOGI++;
2228         elsiocb->iocb_cmpl = lpfc_cmpl_els_plogi;
2229
2230         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
2231                               "Issue PLOGI:     did:x%x refcnt %d",
2232                               did, kref_read(&ndlp->kref), 0);
2233         elsiocb->context1 = lpfc_nlp_get(ndlp);
2234         if (!elsiocb->context1) {
2235                 lpfc_els_free_iocb(phba, elsiocb);
2236                 return 1;
2237         }
2238
2239         ret = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
2240         if (ret) {
2241                 lpfc_els_free_iocb(phba, elsiocb);
2242                 lpfc_nlp_put(ndlp);
2243                 return 1;
2244         }
2245
2246         return 0;
2247 }
2248
2249 /**
2250  * lpfc_cmpl_els_prli - Completion callback function for prli
2251  * @phba: pointer to lpfc hba data structure.
2252  * @cmdiocb: pointer to lpfc command iocb data structure.
2253  * @rspiocb: pointer to lpfc response iocb data structure.
2254  *
2255  * This routine is the completion callback function for a Process Login
2256  * (PRLI) ELS command. The PRLI response IOCB status is checked for error
2257  * status. If there is error status reported, PRLI retry shall be attempted
2258  * by invoking the lpfc_els_retry() routine. Otherwise, the state
2259  * NLP_EVT_CMPL_PRLI is sent to the Discover State Machine (DSM) for this
2260  * ndlp to mark the PRLI completion.
2261  **/
2262 static void
2263 lpfc_cmpl_els_prli(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
2264                    struct lpfc_iocbq *rspiocb)
2265 {
2266         struct lpfc_vport *vport = cmdiocb->vport;
2267         IOCB_t *irsp;
2268         struct lpfc_nodelist *ndlp;
2269         char *mode;
2270         u32 loglevel;
2271
2272         /* we pass cmdiocb to state machine which needs rspiocb as well */
2273         cmdiocb->context_un.rsp_iocb = rspiocb;
2274
2275         irsp = &(rspiocb->iocb);
2276         ndlp = (struct lpfc_nodelist *) cmdiocb->context1;
2277         spin_lock_irq(&ndlp->lock);
2278         ndlp->nlp_flag &= ~NLP_PRLI_SND;
2279
2280         /* Driver supports multiple FC4 types.  Counters matter. */
2281         vport->fc_prli_sent--;
2282         ndlp->fc4_prli_sent--;
2283         spin_unlock_irq(&ndlp->lock);
2284
2285         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
2286                 "PRLI cmpl:       status:x%x/x%x did:x%x",
2287                 irsp->ulpStatus, irsp->un.ulpWord[4],
2288                 ndlp->nlp_DID);
2289
2290         /* PRLI completes to NPort <nlp_DID> */
2291         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
2292                          "0103 PRLI completes to NPort x%06x "
2293                          "Data: x%x x%x x%x x%x\n",
2294                          ndlp->nlp_DID, irsp->ulpStatus, irsp->un.ulpWord[4],
2295                          vport->num_disc_nodes, ndlp->fc4_prli_sent);
2296
2297         /* Check to see if link went down during discovery */
2298         if (lpfc_els_chk_latt(vport))
2299                 goto out;
2300
2301         if (irsp->ulpStatus) {
2302                 /* Check for retry */
2303                 if (lpfc_els_retry(phba, cmdiocb, rspiocb)) {
2304                         /* ELS command is being retried */
2305                         goto out;
2306                 }
2307
2308                 /* If we don't send GFT_ID to Fabric, a PRLI error
2309                  * could be expected.
2310                  */
2311                 if ((vport->fc_flag & FC_FABRIC) ||
2312                     (vport->cfg_enable_fc4_type != LPFC_ENABLE_BOTH)) {
2313                         mode = KERN_ERR;
2314                         loglevel =  LOG_TRACE_EVENT;
2315                 } else {
2316                         mode = KERN_INFO;
2317                         loglevel =  LOG_ELS;
2318                 }
2319
2320                 /* PRLI failed */
2321                 lpfc_printf_vlog(vport, mode, loglevel,
2322                                  "2754 PRLI failure DID:%06X Status:x%x/x%x, "
2323                                  "data: x%x\n",
2324                                  ndlp->nlp_DID, irsp->ulpStatus,
2325                                  irsp->un.ulpWord[4], ndlp->fc4_prli_sent);
2326
2327                 /* Do not call DSM for lpfc_els_abort'ed ELS cmds */
2328                 if (!lpfc_error_lost_link(irsp))
2329                         lpfc_disc_state_machine(vport, ndlp, cmdiocb,
2330                                                 NLP_EVT_CMPL_PRLI);
2331
2332                 /*
2333                  * For P2P topology, retain the node so that PLOGI can be
2334                  * attempted on it again.
2335                  */
2336                 if (vport->fc_flag & FC_PT2PT)
2337                         goto out;
2338
2339                 /* As long as this node is not registered with the SCSI
2340                  * or NVMe transport and no other PRLIs are outstanding,
2341                  * it is no longer an active node.  Otherwise devloss
2342                  * handles the final cleanup.
2343                  */
2344                 if (!(ndlp->fc4_xpt_flags & (SCSI_XPT_REGD | NVME_XPT_REGD)) &&
2345                     !ndlp->fc4_prli_sent) {
2346                         spin_lock_irq(&ndlp->lock);
2347                         ndlp->nlp_flag &= ~NLP_NPR_2B_DISC;
2348                         spin_unlock_irq(&ndlp->lock);
2349                         lpfc_disc_state_machine(vport, ndlp, cmdiocb,
2350                                                 NLP_EVT_DEVICE_RM);
2351                 }
2352         } else {
2353                 /* Good status, call state machine.  However, if another
2354                  * PRLI is outstanding, don't call the state machine
2355                  * because final disposition to Mapped or Unmapped is
2356                  * completed there.
2357                  */
2358                 lpfc_disc_state_machine(vport, ndlp, cmdiocb,
2359                                         NLP_EVT_CMPL_PRLI);
2360         }
2361
2362 out:
2363         lpfc_els_free_iocb(phba, cmdiocb);
2364         lpfc_nlp_put(ndlp);
2365         return;
2366 }
2367
2368 /**
2369  * lpfc_issue_els_prli - Issue a prli iocb command for a vport
2370  * @vport: pointer to a host virtual N_Port data structure.
2371  * @ndlp: pointer to a node-list data structure.
2372  * @retry: number of retries to the command IOCB.
2373  *
2374  * This routine issues a Process Login (PRLI) ELS command for the
2375  * @vport. The PRLI service parameters are set up in the payload of the
2376  * PRLI Request command and the pointer to lpfc_cmpl_els_prli() routine
2377  * is put to the IOCB completion callback func field before invoking the
2378  * routine lpfc_sli_issue_iocb() to send out PRLI command.
2379  *
2380  * Note that the ndlp reference count will be incremented by 1 for holding the
2381  * ndlp and the reference to ndlp will be stored into the context1 field of
2382  * the IOCB for the completion callback function to the PRLI ELS command.
2383  *
2384  * Return code
2385  *   0 - successfully issued prli iocb command for @vport
2386  *   1 - failed to issue prli iocb command for @vport
2387  **/
2388 int
2389 lpfc_issue_els_prli(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
2390                     uint8_t retry)
2391 {
2392         int rc = 0;
2393         struct lpfc_hba *phba = vport->phba;
2394         PRLI *npr;
2395         struct lpfc_nvme_prli *npr_nvme;
2396         struct lpfc_iocbq *elsiocb;
2397         uint8_t *pcmd;
2398         uint16_t cmdsize;
2399         u32 local_nlp_type, elscmd;
2400
2401         /*
2402          * If we are in RSCN mode, the FC4 types supported from a
2403          * previous GFT_ID command may not be accurate. So, if we
2404          * are a NVME Initiator, always look for the possibility of
2405          * the remote NPort beng a NVME Target.
2406          */
2407         if (phba->sli_rev == LPFC_SLI_REV4 &&
2408             vport->fc_flag & FC_RSCN_MODE &&
2409             vport->nvmei_support)
2410                 ndlp->nlp_fc4_type |= NLP_FC4_NVME;
2411         local_nlp_type = ndlp->nlp_fc4_type;
2412
2413         /* This routine will issue 1 or 2 PRLIs, so zero all the ndlp
2414          * fields here before any of them can complete.
2415          */
2416         ndlp->nlp_type &= ~(NLP_FCP_TARGET | NLP_FCP_INITIATOR);
2417         ndlp->nlp_type &= ~(NLP_NVME_TARGET | NLP_NVME_INITIATOR);
2418         ndlp->nlp_fcp_info &= ~NLP_FCP_2_DEVICE;
2419         ndlp->nlp_flag &= ~(NLP_FIRSTBURST | NLP_NPR_2B_DISC);
2420         ndlp->nvme_fb_size = 0;
2421
2422  send_next_prli:
2423         if (local_nlp_type & NLP_FC4_FCP) {
2424                 /* Payload is 4 + 16 = 20 x14 bytes. */
2425                 cmdsize = (sizeof(uint32_t) + sizeof(PRLI));
2426                 elscmd = ELS_CMD_PRLI;
2427         } else if (local_nlp_type & NLP_FC4_NVME) {
2428                 /* Payload is 4 + 20 = 24 x18 bytes. */
2429                 cmdsize = (sizeof(uint32_t) + sizeof(struct lpfc_nvme_prli));
2430                 elscmd = ELS_CMD_NVMEPRLI;
2431         } else {
2432                 lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
2433                                  "3083 Unknown FC_TYPE x%x ndlp x%06x\n",
2434                                  ndlp->nlp_fc4_type, ndlp->nlp_DID);
2435                 return 1;
2436         }
2437
2438         /* SLI3 ports don't support NVME.  If this rport is a strict NVME
2439          * FC4 type, implicitly LOGO.
2440          */
2441         if (phba->sli_rev == LPFC_SLI_REV3 &&
2442             ndlp->nlp_fc4_type == NLP_FC4_NVME) {
2443                 lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
2444                                  "3088 Rport fc4 type 0x%x not supported by SLI3 adapter\n",
2445                                  ndlp->nlp_type);
2446                 lpfc_disc_state_machine(vport, ndlp, NULL, NLP_EVT_DEVICE_RM);
2447                 return 1;
2448         }
2449
2450         elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, retry, ndlp,
2451                                      ndlp->nlp_DID, elscmd);
2452         if (!elsiocb)
2453                 return 1;
2454
2455         pcmd = (uint8_t *) (((struct lpfc_dmabuf *) elsiocb->context2)->virt);
2456
2457         /* For PRLI request, remainder of payload is service parameters */
2458         memset(pcmd, 0, cmdsize);
2459
2460         if (local_nlp_type & NLP_FC4_FCP) {
2461                 /* Remainder of payload is FCP PRLI parameter page.
2462                  * Note: this data structure is defined as
2463                  * BE/LE in the structure definition so no
2464                  * byte swap call is made.
2465                  */
2466                 *((uint32_t *)(pcmd)) = ELS_CMD_PRLI;
2467                 pcmd += sizeof(uint32_t);
2468                 npr = (PRLI *)pcmd;
2469
2470                 /*
2471                  * If our firmware version is 3.20 or later,
2472                  * set the following bits for FC-TAPE support.
2473                  */
2474                 if (phba->vpd.rev.feaLevelHigh >= 0x02) {
2475                         npr->ConfmComplAllowed = 1;
2476                         npr->Retry = 1;
2477                         npr->TaskRetryIdReq = 1;
2478                 }
2479                 npr->estabImagePair = 1;
2480                 npr->readXferRdyDis = 1;
2481                 if (vport->cfg_first_burst_size)
2482                         npr->writeXferRdyDis = 1;
2483
2484                 /* For FCP support */
2485                 npr->prliType = PRLI_FCP_TYPE;
2486                 npr->initiatorFunc = 1;
2487                 elsiocb->iocb_flag |= LPFC_PRLI_FCP_REQ;
2488
2489                 /* Remove FCP type - processed. */
2490                 local_nlp_type &= ~NLP_FC4_FCP;
2491         } else if (local_nlp_type & NLP_FC4_NVME) {
2492                 /* Remainder of payload is NVME PRLI parameter page.
2493                  * This data structure is the newer definition that
2494                  * uses bf macros so a byte swap is required.
2495                  */
2496                 *((uint32_t *)(pcmd)) = ELS_CMD_NVMEPRLI;
2497                 pcmd += sizeof(uint32_t);
2498                 npr_nvme = (struct lpfc_nvme_prli *)pcmd;
2499                 bf_set(prli_type_code, npr_nvme, PRLI_NVME_TYPE);
2500                 bf_set(prli_estabImagePair, npr_nvme, 0);  /* Should be 0 */
2501                 if (phba->nsler) {
2502                         bf_set(prli_nsler, npr_nvme, 1);
2503                         bf_set(prli_conf, npr_nvme, 1);
2504                 }
2505
2506                 /* Only initiators request first burst. */
2507                 if ((phba->cfg_nvme_enable_fb) &&
2508                     !phba->nvmet_support)
2509                         bf_set(prli_fba, npr_nvme, 1);
2510
2511                 if (phba->nvmet_support) {
2512                         bf_set(prli_tgt, npr_nvme, 1);
2513                         bf_set(prli_disc, npr_nvme, 1);
2514                 } else {
2515                         bf_set(prli_init, npr_nvme, 1);
2516                         bf_set(prli_conf, npr_nvme, 1);
2517                 }
2518
2519                 npr_nvme->word1 = cpu_to_be32(npr_nvme->word1);
2520                 npr_nvme->word4 = cpu_to_be32(npr_nvme->word4);
2521                 elsiocb->iocb_flag |= LPFC_PRLI_NVME_REQ;
2522
2523                 /* Remove NVME type - processed. */
2524                 local_nlp_type &= ~NLP_FC4_NVME;
2525         }
2526
2527         phba->fc_stat.elsXmitPRLI++;
2528         elsiocb->iocb_cmpl = lpfc_cmpl_els_prli;
2529         spin_lock_irq(&ndlp->lock);
2530         ndlp->nlp_flag |= NLP_PRLI_SND;
2531
2532         /* The vport counters are used for lpfc_scan_finished, but
2533          * the ndlp is used to track outstanding PRLIs for different
2534          * FC4 types.
2535          */
2536         vport->fc_prli_sent++;
2537         ndlp->fc4_prli_sent++;
2538         spin_unlock_irq(&ndlp->lock);
2539
2540         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
2541                               "Issue PRLI:  did:x%x refcnt %d",
2542                               ndlp->nlp_DID, kref_read(&ndlp->kref), 0);
2543         elsiocb->context1 = lpfc_nlp_get(ndlp);
2544         if (!elsiocb->context1) {
2545                 lpfc_els_free_iocb(phba, elsiocb);
2546                 goto err;
2547         }
2548
2549         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
2550         if (rc == IOCB_ERROR) {
2551                 lpfc_els_free_iocb(phba, elsiocb);
2552                 lpfc_nlp_put(ndlp);
2553                 goto err;
2554         }
2555
2556
2557         /* The driver supports 2 FC4 types.  Make sure
2558          * a PRLI is issued for all types before exiting.
2559          */
2560         if (phba->sli_rev == LPFC_SLI_REV4 &&
2561             local_nlp_type & (NLP_FC4_FCP | NLP_FC4_NVME))
2562                 goto send_next_prli;
2563         else
2564                 return 0;
2565
2566 err:
2567         spin_lock_irq(&ndlp->lock);
2568         ndlp->nlp_flag &= ~NLP_PRLI_SND;
2569         spin_unlock_irq(&ndlp->lock);
2570         return 1;
2571 }
2572
2573 /**
2574  * lpfc_rscn_disc - Perform rscn discovery for a vport
2575  * @vport: pointer to a host virtual N_Port data structure.
2576  *
2577  * This routine performs Registration State Change Notification (RSCN)
2578  * discovery for a @vport. If the @vport's node port recovery count is not
2579  * zero, it will invoke the lpfc_els_disc_plogi() to perform PLOGI for all
2580  * the nodes that need recovery. If none of the PLOGI were needed through
2581  * the lpfc_els_disc_plogi() routine, the lpfc_end_rscn() routine shall be
2582  * invoked to check and handle possible more RSCN came in during the period
2583  * of processing the current ones.
2584  **/
2585 static void
2586 lpfc_rscn_disc(struct lpfc_vport *vport)
2587 {
2588         lpfc_can_disctmo(vport);
2589
2590         /* RSCN discovery */
2591         /* go thru NPR nodes and issue ELS PLOGIs */
2592         if (vport->fc_npr_cnt)
2593                 if (lpfc_els_disc_plogi(vport))
2594                         return;
2595
2596         lpfc_end_rscn(vport);
2597 }
2598
2599 /**
2600  * lpfc_adisc_done - Complete the adisc phase of discovery
2601  * @vport: pointer to lpfc_vport hba data structure that finished all ADISCs.
2602  *
2603  * This function is called when the final ADISC is completed during discovery.
2604  * This function handles clearing link attention or issuing reg_vpi depending
2605  * on whether npiv is enabled. This function also kicks off the PLOGI phase of
2606  * discovery.
2607  * This function is called with no locks held.
2608  **/
2609 static void
2610 lpfc_adisc_done(struct lpfc_vport *vport)
2611 {
2612         struct Scsi_Host   *shost = lpfc_shost_from_vport(vport);
2613         struct lpfc_hba   *phba = vport->phba;
2614
2615         /*
2616          * For NPIV, cmpl_reg_vpi will set port_state to READY,
2617          * and continue discovery.
2618          */
2619         if ((phba->sli3_options & LPFC_SLI3_NPIV_ENABLED) &&
2620             !(vport->fc_flag & FC_RSCN_MODE) &&
2621             (phba->sli_rev < LPFC_SLI_REV4)) {
2622
2623                 /*
2624                  * If link is down, clear_la and reg_vpi will be done after
2625                  * flogi following a link up event
2626                  */
2627                 if (!lpfc_is_link_up(phba))
2628                         return;
2629
2630                 /* The ADISCs are complete.  Doesn't matter if they
2631                  * succeeded or failed because the ADISC completion
2632                  * routine guarantees to call the state machine and
2633                  * the RPI is either unregistered (failed ADISC response)
2634                  * or the RPI is still valid and the node is marked
2635                  * mapped for a target.  The exchanges should be in the
2636                  * correct state. This code is specific to SLI3.
2637                  */
2638                 lpfc_issue_clear_la(phba, vport);
2639                 lpfc_issue_reg_vpi(phba, vport);
2640                 return;
2641         }
2642         /*
2643         * For SLI2, we need to set port_state to READY
2644         * and continue discovery.
2645         */
2646         if (vport->port_state < LPFC_VPORT_READY) {
2647                 /* If we get here, there is nothing to ADISC */
2648                 lpfc_issue_clear_la(phba, vport);
2649                 if (!(vport->fc_flag & FC_ABORT_DISCOVERY)) {
2650                         vport->num_disc_nodes = 0;
2651                         /* go thru NPR list, issue ELS PLOGIs */
2652                         if (vport->fc_npr_cnt)
2653                                 lpfc_els_disc_plogi(vport);
2654                         if (!vport->num_disc_nodes) {
2655                                 spin_lock_irq(shost->host_lock);
2656                                 vport->fc_flag &= ~FC_NDISC_ACTIVE;
2657                                 spin_unlock_irq(shost->host_lock);
2658                                 lpfc_can_disctmo(vport);
2659                                 lpfc_end_rscn(vport);
2660                         }
2661                 }
2662                 vport->port_state = LPFC_VPORT_READY;
2663         } else
2664                 lpfc_rscn_disc(vport);
2665 }
2666
2667 /**
2668  * lpfc_more_adisc - Issue more adisc as needed
2669  * @vport: pointer to a host virtual N_Port data structure.
2670  *
2671  * This routine determines whether there are more ndlps on a @vport
2672  * node list need to have Address Discover (ADISC) issued. If so, it will
2673  * invoke the lpfc_els_disc_adisc() routine to issue ADISC on the @vport's
2674  * remaining nodes which need to have ADISC sent.
2675  **/
2676 void
2677 lpfc_more_adisc(struct lpfc_vport *vport)
2678 {
2679         if (vport->num_disc_nodes)
2680                 vport->num_disc_nodes--;
2681         /* Continue discovery with <num_disc_nodes> ADISCs to go */
2682         lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
2683                          "0210 Continue discovery with %d ADISCs to go "
2684                          "Data: x%x x%x x%x\n",
2685                          vport->num_disc_nodes, vport->fc_adisc_cnt,
2686                          vport->fc_flag, vport->port_state);
2687         /* Check to see if there are more ADISCs to be sent */
2688         if (vport->fc_flag & FC_NLP_MORE) {
2689                 lpfc_set_disctmo(vport);
2690                 /* go thru NPR nodes and issue any remaining ELS ADISCs */
2691                 lpfc_els_disc_adisc(vport);
2692         }
2693         if (!vport->num_disc_nodes)
2694                 lpfc_adisc_done(vport);
2695         return;
2696 }
2697
2698 /**
2699  * lpfc_cmpl_els_adisc - Completion callback function for adisc
2700  * @phba: pointer to lpfc hba data structure.
2701  * @cmdiocb: pointer to lpfc command iocb data structure.
2702  * @rspiocb: pointer to lpfc response iocb data structure.
2703  *
2704  * This routine is the completion function for issuing the Address Discover
2705  * (ADISC) command. It first checks to see whether link went down during
2706  * the discovery process. If so, the node will be marked as node port
2707  * recovery for issuing discover IOCB by the link attention handler and
2708  * exit. Otherwise, the response status is checked. If error was reported
2709  * in the response status, the ADISC command shall be retried by invoking
2710  * the lpfc_els_retry() routine. Otherwise, if no error was reported in
2711  * the response status, the state machine is invoked to set transition
2712  * with respect to NLP_EVT_CMPL_ADISC event.
2713  **/
2714 static void
2715 lpfc_cmpl_els_adisc(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
2716                     struct lpfc_iocbq *rspiocb)
2717 {
2718         struct lpfc_vport *vport = cmdiocb->vport;
2719         IOCB_t *irsp;
2720         struct lpfc_nodelist *ndlp;
2721         int  disc;
2722
2723         /* we pass cmdiocb to state machine which needs rspiocb as well */
2724         cmdiocb->context_un.rsp_iocb = rspiocb;
2725
2726         irsp = &(rspiocb->iocb);
2727         ndlp = (struct lpfc_nodelist *) cmdiocb->context1;
2728
2729         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
2730                 "ADISC cmpl:      status:x%x/x%x did:x%x",
2731                 irsp->ulpStatus, irsp->un.ulpWord[4],
2732                 ndlp->nlp_DID);
2733
2734         /* Since ndlp can be freed in the disc state machine, note if this node
2735          * is being used during discovery.
2736          */
2737         spin_lock_irq(&ndlp->lock);
2738         disc = (ndlp->nlp_flag & NLP_NPR_2B_DISC);
2739         ndlp->nlp_flag &= ~(NLP_ADISC_SND | NLP_NPR_2B_DISC);
2740         spin_unlock_irq(&ndlp->lock);
2741         /* ADISC completes to NPort <nlp_DID> */
2742         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
2743                          "0104 ADISC completes to NPort x%x "
2744                          "Data: x%x x%x x%x x%x x%x\n",
2745                          ndlp->nlp_DID, irsp->ulpStatus, irsp->un.ulpWord[4],
2746                          irsp->ulpTimeout, disc, vport->num_disc_nodes);
2747         /* Check to see if link went down during discovery */
2748         if (lpfc_els_chk_latt(vport)) {
2749                 spin_lock_irq(&ndlp->lock);
2750                 ndlp->nlp_flag |= NLP_NPR_2B_DISC;
2751                 spin_unlock_irq(&ndlp->lock);
2752                 goto out;
2753         }
2754
2755         if (irsp->ulpStatus) {
2756                 /* Check for retry */
2757                 if (lpfc_els_retry(phba, cmdiocb, rspiocb)) {
2758                         /* ELS command is being retried */
2759                         if (disc) {
2760                                 spin_lock_irq(&ndlp->lock);
2761                                 ndlp->nlp_flag |= NLP_NPR_2B_DISC;
2762                                 spin_unlock_irq(&ndlp->lock);
2763                                 lpfc_set_disctmo(vport);
2764                         }
2765                         goto out;
2766                 }
2767                 /* ADISC failed */
2768                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
2769                                  "2755 ADISC failure DID:%06X Status:x%x/x%x\n",
2770                                  ndlp->nlp_DID, irsp->ulpStatus,
2771                                  irsp->un.ulpWord[4]);
2772
2773                 lpfc_disc_state_machine(vport, ndlp, cmdiocb,
2774                                 NLP_EVT_CMPL_ADISC);
2775
2776                 /* As long as this node is not registered with the SCSI or NVMe
2777                  * transport, it is no longer an active node. Otherwise
2778                  * devloss handles the final cleanup.
2779                  */
2780                 if (!(ndlp->fc4_xpt_flags & (SCSI_XPT_REGD | NVME_XPT_REGD))) {
2781                         spin_lock_irq(&ndlp->lock);
2782                         ndlp->nlp_flag &= ~NLP_NPR_2B_DISC;
2783                         spin_unlock_irq(&ndlp->lock);
2784                         lpfc_disc_state_machine(vport, ndlp, cmdiocb,
2785                                                 NLP_EVT_DEVICE_RM);
2786                 }
2787         } else
2788                 /* Good status, call state machine */
2789                 lpfc_disc_state_machine(vport, ndlp, cmdiocb,
2790                                         NLP_EVT_CMPL_ADISC);
2791
2792         /* Check to see if there are more ADISCs to be sent */
2793         if (disc && vport->num_disc_nodes)
2794                 lpfc_more_adisc(vport);
2795 out:
2796         lpfc_els_free_iocb(phba, cmdiocb);
2797         lpfc_nlp_put(ndlp);
2798         return;
2799 }
2800
2801 /**
2802  * lpfc_issue_els_adisc - Issue an address discover iocb to an node on a vport
2803  * @vport: pointer to a virtual N_Port data structure.
2804  * @ndlp: pointer to a node-list data structure.
2805  * @retry: number of retries to the command IOCB.
2806  *
2807  * This routine issues an Address Discover (ADISC) for an @ndlp on a
2808  * @vport. It prepares the payload of the ADISC ELS command, updates the
2809  * and states of the ndlp, and invokes the lpfc_sli_issue_iocb() routine
2810  * to issue the ADISC ELS command.
2811  *
2812  * Note that the ndlp reference count will be incremented by 1 for holding the
2813  * ndlp and the reference to ndlp will be stored into the context1 field of
2814  * the IOCB for the completion callback function to the ADISC ELS command.
2815  *
2816  * Return code
2817  *   0 - successfully issued adisc
2818  *   1 - failed to issue adisc
2819  **/
2820 int
2821 lpfc_issue_els_adisc(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
2822                      uint8_t retry)
2823 {
2824         int rc = 0;
2825         struct lpfc_hba  *phba = vport->phba;
2826         ADISC *ap;
2827         struct lpfc_iocbq *elsiocb;
2828         uint8_t *pcmd;
2829         uint16_t cmdsize;
2830
2831         cmdsize = (sizeof(uint32_t) + sizeof(ADISC));
2832         elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, retry, ndlp,
2833                                      ndlp->nlp_DID, ELS_CMD_ADISC);
2834         if (!elsiocb)
2835                 return 1;
2836
2837         pcmd = (uint8_t *) (((struct lpfc_dmabuf *) elsiocb->context2)->virt);
2838
2839         /* For ADISC request, remainder of payload is service parameters */
2840         *((uint32_t *) (pcmd)) = ELS_CMD_ADISC;
2841         pcmd += sizeof(uint32_t);
2842
2843         /* Fill in ADISC payload */
2844         ap = (ADISC *) pcmd;
2845         ap->hardAL_PA = phba->fc_pref_ALPA;
2846         memcpy(&ap->portName, &vport->fc_portname, sizeof(struct lpfc_name));
2847         memcpy(&ap->nodeName, &vport->fc_nodename, sizeof(struct lpfc_name));
2848         ap->DID = be32_to_cpu(vport->fc_myDID);
2849
2850         phba->fc_stat.elsXmitADISC++;
2851         elsiocb->iocb_cmpl = lpfc_cmpl_els_adisc;
2852         spin_lock_irq(&ndlp->lock);
2853         ndlp->nlp_flag |= NLP_ADISC_SND;
2854         spin_unlock_irq(&ndlp->lock);
2855         elsiocb->context1 = lpfc_nlp_get(ndlp);
2856         if (!elsiocb->context1) {
2857                 lpfc_els_free_iocb(phba, elsiocb);
2858                 goto err;
2859         }
2860
2861         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
2862                               "Issue ADISC:   did:x%x refcnt %d",
2863                               ndlp->nlp_DID, kref_read(&ndlp->kref), 0);
2864         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
2865         if (rc == IOCB_ERROR) {
2866                 lpfc_els_free_iocb(phba, elsiocb);
2867                 lpfc_nlp_put(ndlp);
2868                 goto err;
2869         }
2870
2871         return 0;
2872
2873 err:
2874         spin_lock_irq(&ndlp->lock);
2875         ndlp->nlp_flag &= ~NLP_ADISC_SND;
2876         spin_unlock_irq(&ndlp->lock);
2877         return 1;
2878 }
2879
2880 /**
2881  * lpfc_cmpl_els_logo - Completion callback function for logo
2882  * @phba: pointer to lpfc hba data structure.
2883  * @cmdiocb: pointer to lpfc command iocb data structure.
2884  * @rspiocb: pointer to lpfc response iocb data structure.
2885  *
2886  * This routine is the completion function for issuing the ELS Logout (LOGO)
2887  * command. If no error status was reported from the LOGO response, the
2888  * state machine of the associated ndlp shall be invoked for transition with
2889  * respect to NLP_EVT_CMPL_LOGO event.
2890  **/
2891 static void
2892 lpfc_cmpl_els_logo(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
2893                    struct lpfc_iocbq *rspiocb)
2894 {
2895         struct lpfc_nodelist *ndlp = (struct lpfc_nodelist *) cmdiocb->context1;
2896         struct lpfc_vport *vport = ndlp->vport;
2897         IOCB_t *irsp;
2898         unsigned long flags;
2899         uint32_t skip_recovery = 0;
2900         int wake_up_waiter = 0;
2901
2902         /* we pass cmdiocb to state machine which needs rspiocb as well */
2903         cmdiocb->context_un.rsp_iocb = rspiocb;
2904
2905         irsp = &(rspiocb->iocb);
2906         spin_lock_irq(&ndlp->lock);
2907         ndlp->nlp_flag &= ~NLP_LOGO_SND;
2908         if (ndlp->save_flags & NLP_WAIT_FOR_LOGO) {
2909                 wake_up_waiter = 1;
2910                 ndlp->save_flags &= ~NLP_WAIT_FOR_LOGO;
2911         }
2912         spin_unlock_irq(&ndlp->lock);
2913
2914         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
2915                 "LOGO cmpl:       status:x%x/x%x did:x%x",
2916                 irsp->ulpStatus, irsp->un.ulpWord[4],
2917                 ndlp->nlp_DID);
2918
2919         /* LOGO completes to NPort <nlp_DID> */
2920         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
2921                          "0105 LOGO completes to NPort x%x "
2922                          "refcnt %d nflags x%x Data: x%x x%x x%x x%x\n",
2923                          ndlp->nlp_DID, kref_read(&ndlp->kref), ndlp->nlp_flag,
2924                          irsp->ulpStatus, irsp->un.ulpWord[4],
2925                          irsp->ulpTimeout, vport->num_disc_nodes);
2926
2927         if (lpfc_els_chk_latt(vport)) {
2928                 skip_recovery = 1;
2929                 goto out;
2930         }
2931
2932         /* The LOGO will not be retried on failure.  A LOGO was
2933          * issued to the remote rport and a ACC or RJT or no Answer are
2934          * all acceptable.  Note the failure and move forward with
2935          * discovery.  The PLOGI will retry.
2936          */
2937         if (irsp->ulpStatus) {
2938                 /* LOGO failed */
2939                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
2940                                  "2756 LOGO failure, No Retry DID:%06X Status:x%x/x%x\n",
2941                                  ndlp->nlp_DID, irsp->ulpStatus,
2942                                  irsp->un.ulpWord[4]);
2943                 /* Do not call DSM for lpfc_els_abort'ed ELS cmds */
2944                 if (lpfc_error_lost_link(irsp)) {
2945                         skip_recovery = 1;
2946                         goto out;
2947                 }
2948         }
2949
2950         /* Call state machine. This will unregister the rpi if needed. */
2951         lpfc_disc_state_machine(vport, ndlp, cmdiocb, NLP_EVT_CMPL_LOGO);
2952
2953         /* The driver sets this flag for an NPIV instance that doesn't want to
2954          * log into the remote port.
2955          */
2956         if (ndlp->nlp_flag & NLP_TARGET_REMOVE) {
2957                 spin_lock_irq(&ndlp->lock);
2958                 if (phba->sli_rev == LPFC_SLI_REV4)
2959                         ndlp->nlp_flag |= NLP_RELEASE_RPI;
2960                 ndlp->nlp_flag &= ~NLP_NPR_2B_DISC;
2961                 spin_unlock_irq(&ndlp->lock);
2962                 lpfc_disc_state_machine(vport, ndlp, cmdiocb,
2963                                         NLP_EVT_DEVICE_RM);
2964                 lpfc_els_free_iocb(phba, cmdiocb);
2965                 lpfc_nlp_put(ndlp);
2966
2967                 /* Presume the node was released. */
2968                 return;
2969         }
2970
2971 out:
2972         /* Driver is done with the IO.  */
2973         lpfc_els_free_iocb(phba, cmdiocb);
2974         lpfc_nlp_put(ndlp);
2975
2976         /* At this point, the LOGO processing is complete. NOTE: For a
2977          * pt2pt topology, we are assuming the NPortID will only change
2978          * on link up processing. For a LOGO / PLOGI initiated by the
2979          * Initiator, we are assuming the NPortID is not going to change.
2980          */
2981
2982         if (wake_up_waiter && ndlp->logo_waitq)
2983                 wake_up(ndlp->logo_waitq);
2984         /*
2985          * If the node is a target, the handling attempts to recover the port.
2986          * For any other port type, the rpi is unregistered as an implicit
2987          * LOGO.
2988          */
2989         if (ndlp->nlp_type & (NLP_FCP_TARGET | NLP_NVME_TARGET) &&
2990             skip_recovery == 0) {
2991                 lpfc_cancel_retry_delay_tmo(vport, ndlp);
2992                 spin_lock_irqsave(&ndlp->lock, flags);
2993                 ndlp->nlp_flag |= NLP_NPR_2B_DISC;
2994                 spin_unlock_irqrestore(&ndlp->lock, flags);
2995
2996                 lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
2997                                  "3187 LOGO completes to NPort x%x: Start "
2998                                  "Recovery Data: x%x x%x x%x x%x\n",
2999                                  ndlp->nlp_DID, irsp->ulpStatus,
3000                                  irsp->un.ulpWord[4], irsp->ulpTimeout,
3001                                  vport->num_disc_nodes);
3002                 lpfc_disc_start(vport);
3003                 return;
3004         }
3005
3006         /* Cleanup path for failed REG_RPI handling. If REG_RPI fails, the
3007          * driver sends a LOGO to the rport to cleanup.  For fabric and
3008          * initiator ports cleanup the node as long as it the node is not
3009          * register with the transport.
3010          */
3011         if (!(ndlp->fc4_xpt_flags & (SCSI_XPT_REGD | NVME_XPT_REGD))) {
3012                 spin_lock_irq(&ndlp->lock);
3013                 ndlp->nlp_flag &= ~NLP_NPR_2B_DISC;
3014                 spin_unlock_irq(&ndlp->lock);
3015                 lpfc_disc_state_machine(vport, ndlp, cmdiocb,
3016                                         NLP_EVT_DEVICE_RM);
3017         }
3018 }
3019
3020 /**
3021  * lpfc_issue_els_logo - Issue a logo to an node on a vport
3022  * @vport: pointer to a virtual N_Port data structure.
3023  * @ndlp: pointer to a node-list data structure.
3024  * @retry: number of retries to the command IOCB.
3025  *
3026  * This routine constructs and issues an ELS Logout (LOGO) iocb command
3027  * to a remote node, referred by an @ndlp on a @vport. It constructs the
3028  * payload of the IOCB, properly sets up the @ndlp state, and invokes the
3029  * lpfc_sli_issue_iocb() routine to send out the LOGO ELS command.
3030  *
3031  * Note that the ndlp reference count will be incremented by 1 for holding the
3032  * ndlp and the reference to ndlp will be stored into the context1 field of
3033  * the IOCB for the completion callback function to the LOGO ELS command.
3034  *
3035  * Callers of this routine are expected to unregister the RPI first
3036  *
3037  * Return code
3038  *   0 - successfully issued logo
3039  *   1 - failed to issue logo
3040  **/
3041 int
3042 lpfc_issue_els_logo(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
3043                     uint8_t retry)
3044 {
3045         struct lpfc_hba  *phba = vport->phba;
3046         struct lpfc_iocbq *elsiocb;
3047         uint8_t *pcmd;
3048         uint16_t cmdsize;
3049         int rc;
3050
3051         spin_lock_irq(&ndlp->lock);
3052         if (ndlp->nlp_flag & NLP_LOGO_SND) {
3053                 spin_unlock_irq(&ndlp->lock);
3054                 return 0;
3055         }
3056         spin_unlock_irq(&ndlp->lock);
3057
3058         cmdsize = (2 * sizeof(uint32_t)) + sizeof(struct lpfc_name);
3059         elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, retry, ndlp,
3060                                      ndlp->nlp_DID, ELS_CMD_LOGO);
3061         if (!elsiocb)
3062                 return 1;
3063
3064         pcmd = (uint8_t *) (((struct lpfc_dmabuf *) elsiocb->context2)->virt);
3065         *((uint32_t *) (pcmd)) = ELS_CMD_LOGO;
3066         pcmd += sizeof(uint32_t);
3067
3068         /* Fill in LOGO payload */
3069         *((uint32_t *) (pcmd)) = be32_to_cpu(vport->fc_myDID);
3070         pcmd += sizeof(uint32_t);
3071         memcpy(pcmd, &vport->fc_portname, sizeof(struct lpfc_name));
3072
3073         phba->fc_stat.elsXmitLOGO++;
3074         elsiocb->iocb_cmpl = lpfc_cmpl_els_logo;
3075         spin_lock_irq(&ndlp->lock);
3076         ndlp->nlp_flag |= NLP_LOGO_SND;
3077         ndlp->nlp_flag &= ~NLP_ISSUE_LOGO;
3078         spin_unlock_irq(&ndlp->lock);
3079         elsiocb->context1 = lpfc_nlp_get(ndlp);
3080         if (!elsiocb->context1) {
3081                 lpfc_els_free_iocb(phba, elsiocb);
3082                 goto err;
3083         }
3084
3085         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
3086                               "Issue LOGO:      did:x%x refcnt %d",
3087                               ndlp->nlp_DID, kref_read(&ndlp->kref), 0);
3088         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
3089         if (rc == IOCB_ERROR) {
3090                 lpfc_els_free_iocb(phba, elsiocb);
3091                 lpfc_nlp_put(ndlp);
3092                 goto err;
3093         }
3094
3095         spin_lock_irq(&ndlp->lock);
3096         ndlp->nlp_prev_state = ndlp->nlp_state;
3097         spin_unlock_irq(&ndlp->lock);
3098         lpfc_nlp_set_state(vport, ndlp, NLP_STE_LOGO_ISSUE);
3099         return 0;
3100
3101 err:
3102         spin_lock_irq(&ndlp->lock);
3103         ndlp->nlp_flag &= ~NLP_LOGO_SND;
3104         spin_unlock_irq(&ndlp->lock);
3105         return 1;
3106 }
3107
3108 /**
3109  * lpfc_cmpl_els_cmd - Completion callback function for generic els command
3110  * @phba: pointer to lpfc hba data structure.
3111  * @cmdiocb: pointer to lpfc command iocb data structure.
3112  * @rspiocb: pointer to lpfc response iocb data structure.
3113  *
3114  * This routine is a generic completion callback function for ELS commands.
3115  * Specifically, it is the callback function which does not need to perform
3116  * any command specific operations. It is currently used by the ELS command
3117  * issuing routines for RSCN, lpfc_issue_els_rscn, and the ELS Fibre Channel
3118  * Address Resolution Protocol Response (FARPR) routine, lpfc_issue_els_farpr().
3119  * Other than certain debug loggings, this callback function simply invokes the
3120  * lpfc_els_chk_latt() routine to check whether link went down during the
3121  * discovery process.
3122  **/
3123 static void
3124 lpfc_cmpl_els_cmd(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
3125                   struct lpfc_iocbq *rspiocb)
3126 {
3127         struct lpfc_vport *vport = cmdiocb->vport;
3128         struct lpfc_nodelist *free_ndlp;
3129         IOCB_t *irsp;
3130
3131         irsp = &rspiocb->iocb;
3132
3133         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
3134                               "ELS cmd cmpl:    status:x%x/x%x did:x%x",
3135                               irsp->ulpStatus, irsp->un.ulpWord[4],
3136                               irsp->un.elsreq64.remoteID);
3137
3138         /* ELS cmd tag <ulpIoTag> completes */
3139         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
3140                          "0106 ELS cmd tag x%x completes Data: x%x x%x x%x\n",
3141                          irsp->ulpIoTag, irsp->ulpStatus,
3142                          irsp->un.ulpWord[4], irsp->ulpTimeout);
3143
3144         /* Check to see if link went down during discovery */
3145         lpfc_els_chk_latt(vport);
3146
3147         free_ndlp = (struct lpfc_nodelist *)cmdiocb->context1;
3148
3149         lpfc_els_free_iocb(phba, cmdiocb);
3150         lpfc_nlp_put(free_ndlp);
3151 }
3152
3153 /**
3154  * lpfc_reg_fab_ctrl_node - RPI register the fabric controller node.
3155  * @vport: pointer to lpfc_vport data structure.
3156  * @fc_ndlp: pointer to the fabric controller (0xfffffd) node.
3157  *
3158  * This routine registers the rpi assigned to the fabric controller
3159  * NPort_ID (0xfffffd) with the port and moves the node to UNMAPPED
3160  * state triggering a registration with the SCSI transport.
3161  *
3162  * This routine is single out because the fabric controller node
3163  * does not receive a PLOGI.  This routine is consumed by the
3164  * SCR and RDF ELS commands.  Callers are expected to qualify
3165  * with SLI4 first.
3166  **/
3167 static int
3168 lpfc_reg_fab_ctrl_node(struct lpfc_vport *vport, struct lpfc_nodelist *fc_ndlp)
3169 {
3170         int rc = 0;
3171         struct lpfc_hba *phba = vport->phba;
3172         struct lpfc_nodelist *ns_ndlp;
3173         LPFC_MBOXQ_t *mbox;
3174         struct lpfc_dmabuf *mp;
3175
3176         if (fc_ndlp->nlp_flag & NLP_RPI_REGISTERED)
3177                 return rc;
3178
3179         ns_ndlp = lpfc_findnode_did(vport, NameServer_DID);
3180         if (!ns_ndlp)
3181                 return -ENODEV;
3182
3183         lpfc_printf_vlog(vport, KERN_INFO, LOG_NODE,
3184                          "0935 %s: Reg FC RPI x%x on FC DID x%x NSSte: x%x\n",
3185                          __func__, fc_ndlp->nlp_rpi, fc_ndlp->nlp_DID,
3186                          ns_ndlp->nlp_state);
3187         if (ns_ndlp->nlp_state != NLP_STE_UNMAPPED_NODE)
3188                 return -ENODEV;
3189
3190         mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
3191         if (!mbox) {
3192                 lpfc_printf_vlog(vport, KERN_ERR, LOG_NODE,
3193                                  "0936 %s: no memory for reg_login "
3194                                  "Data: x%x x%x x%x x%x\n", __func__,
3195                                  fc_ndlp->nlp_DID, fc_ndlp->nlp_state,
3196                                  fc_ndlp->nlp_flag, fc_ndlp->nlp_rpi);
3197                 return -ENOMEM;
3198         }
3199         rc = lpfc_reg_rpi(phba, vport->vpi, fc_ndlp->nlp_DID,
3200                           (u8 *)&vport->fc_sparam, mbox, fc_ndlp->nlp_rpi);
3201         if (rc) {
3202                 rc = -EACCES;
3203                 goto out;
3204         }
3205
3206         fc_ndlp->nlp_flag |= NLP_REG_LOGIN_SEND;
3207         mbox->mbox_cmpl = lpfc_mbx_cmpl_fc_reg_login;
3208         mbox->ctx_ndlp = lpfc_nlp_get(fc_ndlp);
3209         if (!mbox->ctx_ndlp) {
3210                 rc = -ENOMEM;
3211                 goto out_mem;
3212         }
3213
3214         mbox->vport = vport;
3215         rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
3216         if (rc == MBX_NOT_FINISHED) {
3217                 rc = -ENODEV;
3218                 lpfc_nlp_put(fc_ndlp);
3219                 goto out_mem;
3220         }
3221         /* Success path. Exit. */
3222         lpfc_nlp_set_state(vport, fc_ndlp,
3223                            NLP_STE_REG_LOGIN_ISSUE);
3224         return 0;
3225
3226  out_mem:
3227         fc_ndlp->nlp_flag &= ~NLP_REG_LOGIN_SEND;
3228         mp = (struct lpfc_dmabuf *)mbox->ctx_buf;
3229         lpfc_mbuf_free(phba, mp->virt, mp->phys);
3230         kfree(mp);
3231
3232  out:
3233         mempool_free(mbox, phba->mbox_mem_pool);
3234         lpfc_printf_vlog(vport, KERN_ERR, LOG_NODE,
3235                          "0938 %s: failed to format reg_login "
3236                          "Data: x%x x%x x%x x%x\n", __func__,
3237                          fc_ndlp->nlp_DID, fc_ndlp->nlp_state,
3238                          fc_ndlp->nlp_flag, fc_ndlp->nlp_rpi);
3239         return rc;
3240 }
3241
3242 /**
3243  * lpfc_cmpl_els_disc_cmd - Completion callback function for Discovery ELS cmd
3244  * @phba: pointer to lpfc hba data structure.
3245  * @cmdiocb: pointer to lpfc command iocb data structure.
3246  * @rspiocb: pointer to lpfc response iocb data structure.
3247  *
3248  * This routine is a generic completion callback function for Discovery ELS cmd.
3249  * Currently used by the ELS command issuing routines for the ELS State Change
3250  * Request (SCR), lpfc_issue_els_scr() and the ELS RDF, lpfc_issue_els_rdf().
3251  * These commands will be retried once only for ELS timeout errors.
3252  **/
3253 static void
3254 lpfc_cmpl_els_disc_cmd(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
3255                        struct lpfc_iocbq *rspiocb)
3256 {
3257         struct lpfc_vport *vport = cmdiocb->vport;
3258         IOCB_t *irsp;
3259         struct lpfc_els_rdf_rsp *prdf;
3260         struct lpfc_dmabuf *pcmd, *prsp;
3261         u32 *pdata;
3262         u32 cmd;
3263         struct lpfc_nodelist *ndlp = cmdiocb->context1;
3264
3265         irsp = &rspiocb->iocb;
3266
3267         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
3268                 "ELS cmd cmpl:    status:x%x/x%x did:x%x",
3269                 irsp->ulpStatus, irsp->un.ulpWord[4],
3270                 irsp->un.elsreq64.remoteID);
3271         /* ELS cmd tag <ulpIoTag> completes */
3272         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS | LOG_CGN_MGMT,
3273                          "0217 ELS cmd tag x%x completes Data: x%x x%x x%x "
3274                          "x%x\n",
3275                          irsp->ulpIoTag, irsp->ulpStatus,
3276                          irsp->un.ulpWord[4], irsp->ulpTimeout,
3277                          cmdiocb->retry);
3278
3279         pcmd = (struct lpfc_dmabuf *)cmdiocb->context2;
3280         if (!pcmd)
3281                 goto out;
3282
3283         pdata = (u32 *)pcmd->virt;
3284         if (!pdata)
3285                 goto out;
3286         cmd = *pdata;
3287
3288         /* Only 1 retry for ELS Timeout only */
3289         if (irsp->ulpStatus == IOSTAT_LOCAL_REJECT &&
3290             ((irsp->un.ulpWord[4] & IOERR_PARAM_MASK) ==
3291             IOERR_SEQUENCE_TIMEOUT)) {
3292                 cmdiocb->retry++;
3293                 if (cmdiocb->retry <= 1) {
3294                         switch (cmd) {
3295                         case ELS_CMD_SCR:
3296                                 lpfc_issue_els_scr(vport, cmdiocb->retry);
3297                                 break;
3298                         case ELS_CMD_EDC:
3299                                 lpfc_issue_els_edc(vport, cmdiocb->retry);
3300                                 break;
3301                         case ELS_CMD_RDF:
3302                                 cmdiocb->context1 = NULL; /* save ndlp refcnt */
3303                                 lpfc_issue_els_rdf(vport, cmdiocb->retry);
3304                                 break;
3305                         }
3306                         goto out;
3307                 }
3308                 phba->fc_stat.elsRetryExceeded++;
3309         }
3310         if (cmd == ELS_CMD_EDC) {
3311                 /* must be called before checking uplStatus and returning */
3312                 lpfc_cmpl_els_edc(phba, cmdiocb, rspiocb);
3313                 return;
3314         }
3315         if (irsp->ulpStatus) {
3316                 /* ELS discovery cmd completes with error */
3317                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_ELS,
3318                                  "4203 ELS cmd x%x error: x%x x%X\n", cmd,
3319                                  irsp->ulpStatus, irsp->un.ulpWord[4]);
3320                 goto out;
3321         }
3322
3323         /* The RDF response doesn't have any impact on the running driver
3324          * but the notification descriptors are dumped here for support.
3325          */
3326         if (cmd == ELS_CMD_RDF) {
3327                 int i;
3328
3329                 prsp = list_get_first(&pcmd->list, struct lpfc_dmabuf, list);
3330                 if (!prsp)
3331                         goto out;
3332
3333                 prdf = (struct lpfc_els_rdf_rsp *)prsp->virt;
3334                 if (!prdf)
3335                         goto out;
3336
3337                 for (i = 0; i < ELS_RDF_REG_TAG_CNT &&
3338                             i < be32_to_cpu(prdf->reg_d1.reg_desc.count); i++)
3339                         lpfc_printf_vlog(vport, KERN_INFO,
3340                                          LOG_ELS | LOG_CGN_MGMT,
3341                                          "4677 Fabric RDF Notification Grant "
3342                                          "Data: 0x%08x Reg: %x %x\n",
3343                                          be32_to_cpu(
3344                                                 prdf->reg_d1.desc_tags[i]),
3345                                          phba->cgn_reg_signal,
3346                                          phba->cgn_reg_fpin);
3347         }
3348
3349 out:
3350         /* Check to see if link went down during discovery */
3351         lpfc_els_chk_latt(vport);
3352         lpfc_els_free_iocb(phba, cmdiocb);
3353         lpfc_nlp_put(ndlp);
3354         return;
3355 }
3356
3357 /**
3358  * lpfc_issue_els_scr - Issue a scr to an node on a vport
3359  * @vport: pointer to a host virtual N_Port data structure.
3360  * @retry: retry counter for the command IOCB.
3361  *
3362  * This routine issues a State Change Request (SCR) to a fabric node
3363  * on a @vport. The remote node is Fabric Controller (0xfffffd). It
3364  * first search the @vport node list to find the matching ndlp. If no such
3365  * ndlp is found, a new ndlp shall be created for this (SCR) purpose. An
3366  * IOCB is allocated, payload prepared, and the lpfc_sli_issue_iocb()
3367  * routine is invoked to send the SCR IOCB.
3368  *
3369  * Note that the ndlp reference count will be incremented by 1 for holding the
3370  * ndlp and the reference to ndlp will be stored into the context1 field of
3371  * the IOCB for the completion callback function to the SCR ELS command.
3372  *
3373  * Return code
3374  *   0 - Successfully issued scr command
3375  *   1 - Failed to issue scr command
3376  **/
3377 int
3378 lpfc_issue_els_scr(struct lpfc_vport *vport, uint8_t retry)
3379 {
3380         int rc = 0;
3381         struct lpfc_hba  *phba = vport->phba;
3382         struct lpfc_iocbq *elsiocb;
3383         uint8_t *pcmd;
3384         uint16_t cmdsize;
3385         struct lpfc_nodelist *ndlp;
3386
3387         cmdsize = (sizeof(uint32_t) + sizeof(SCR));
3388
3389         ndlp = lpfc_findnode_did(vport, Fabric_Cntl_DID);
3390         if (!ndlp) {
3391                 ndlp = lpfc_nlp_init(vport, Fabric_Cntl_DID);
3392                 if (!ndlp)
3393                         return 1;
3394                 lpfc_enqueue_node(vport, ndlp);
3395         }
3396
3397         elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, retry, ndlp,
3398                                      ndlp->nlp_DID, ELS_CMD_SCR);
3399         if (!elsiocb)
3400                 return 1;
3401
3402         if (phba->sli_rev == LPFC_SLI_REV4) {
3403                 rc = lpfc_reg_fab_ctrl_node(vport, ndlp);
3404                 if (rc) {
3405                         lpfc_els_free_iocb(phba, elsiocb);
3406                         lpfc_printf_vlog(vport, KERN_ERR, LOG_NODE,
3407                                          "0937 %s: Failed to reg fc node, rc %d\n",
3408                                          __func__, rc);
3409                         return 1;
3410                 }
3411         }
3412         pcmd = (uint8_t *) (((struct lpfc_dmabuf *) elsiocb->context2)->virt);
3413
3414         *((uint32_t *) (pcmd)) = ELS_CMD_SCR;
3415         pcmd += sizeof(uint32_t);
3416
3417         /* For SCR, remainder of payload is SCR parameter page */
3418         memset(pcmd, 0, sizeof(SCR));
3419         ((SCR *) pcmd)->Function = SCR_FUNC_FULL;
3420
3421         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
3422                 "Issue SCR:       did:x%x",
3423                 ndlp->nlp_DID, 0, 0);
3424
3425         phba->fc_stat.elsXmitSCR++;
3426         elsiocb->iocb_cmpl = lpfc_cmpl_els_disc_cmd;
3427         elsiocb->context1 = lpfc_nlp_get(ndlp);
3428         if (!elsiocb->context1) {
3429                 lpfc_els_free_iocb(phba, elsiocb);
3430                 return 1;
3431         }
3432
3433         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
3434                               "Issue SCR:     did:x%x refcnt %d",
3435                               ndlp->nlp_DID, kref_read(&ndlp->kref), 0);
3436
3437         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
3438         if (rc == IOCB_ERROR) {
3439                 lpfc_els_free_iocb(phba, elsiocb);
3440                 lpfc_nlp_put(ndlp);
3441                 return 1;
3442         }
3443
3444         return 0;
3445 }
3446
3447 /**
3448  * lpfc_issue_els_rscn - Issue an RSCN to the Fabric Controller (Fabric)
3449  *   or the other nport (pt2pt).
3450  * @vport: pointer to a host virtual N_Port data structure.
3451  * @retry: number of retries to the command IOCB.
3452  *
3453  * This routine issues a RSCN to the Fabric Controller (DID 0xFFFFFD)
3454  *  when connected to a fabric, or to the remote port when connected
3455  *  in point-to-point mode. When sent to the Fabric Controller, it will
3456  *  replay the RSCN to registered recipients.
3457  *
3458  * Note that the ndlp reference count will be incremented by 1 for holding the
3459  * ndlp and the reference to ndlp will be stored into the context1 field of
3460  * the IOCB for the completion callback function to the RSCN ELS command.
3461  *
3462  * Return code
3463  *   0 - Successfully issued RSCN command
3464  *   1 - Failed to issue RSCN command
3465  **/
3466 int
3467 lpfc_issue_els_rscn(struct lpfc_vport *vport, uint8_t retry)
3468 {
3469         int rc = 0;
3470         struct lpfc_hba *phba = vport->phba;
3471         struct lpfc_iocbq *elsiocb;
3472         struct lpfc_nodelist *ndlp;
3473         struct {
3474                 struct fc_els_rscn rscn;
3475                 struct fc_els_rscn_page portid;
3476         } *event;
3477         uint32_t nportid;
3478         uint16_t cmdsize = sizeof(*event);
3479
3480         /* Not supported for private loop */
3481         if (phba->fc_topology == LPFC_TOPOLOGY_LOOP &&
3482             !(vport->fc_flag & FC_PUBLIC_LOOP))
3483                 return 1;
3484
3485         if (vport->fc_flag & FC_PT2PT) {
3486                 /* find any mapped nport - that would be the other nport */
3487                 ndlp = lpfc_findnode_mapped(vport);
3488                 if (!ndlp)
3489                         return 1;
3490         } else {
3491                 nportid = FC_FID_FCTRL;
3492                 /* find the fabric controller node */
3493                 ndlp = lpfc_findnode_did(vport, nportid);
3494                 if (!ndlp) {
3495                         /* if one didn't exist, make one */
3496                         ndlp = lpfc_nlp_init(vport, nportid);
3497                         if (!ndlp)
3498                                 return 1;
3499                         lpfc_enqueue_node(vport, ndlp);
3500                 }
3501         }
3502
3503         elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, retry, ndlp,
3504                                      ndlp->nlp_DID, ELS_CMD_RSCN_XMT);
3505
3506         if (!elsiocb)
3507                 return 1;
3508
3509         event = ((struct lpfc_dmabuf *)elsiocb->context2)->virt;
3510
3511         event->rscn.rscn_cmd = ELS_RSCN;
3512         event->rscn.rscn_page_len = sizeof(struct fc_els_rscn_page);
3513         event->rscn.rscn_plen = cpu_to_be16(cmdsize);
3514
3515         nportid = vport->fc_myDID;
3516         /* appears that page flags must be 0 for fabric to broadcast RSCN */
3517         event->portid.rscn_page_flags = 0;
3518         event->portid.rscn_fid[0] = (nportid & 0x00FF0000) >> 16;
3519         event->portid.rscn_fid[1] = (nportid & 0x0000FF00) >> 8;
3520         event->portid.rscn_fid[2] = nportid & 0x000000FF;
3521
3522         phba->fc_stat.elsXmitRSCN++;
3523         elsiocb->iocb_cmpl = lpfc_cmpl_els_cmd;
3524         elsiocb->context1 = lpfc_nlp_get(ndlp);
3525         if (!elsiocb->context1) {
3526                 lpfc_els_free_iocb(phba, elsiocb);
3527                 return 1;
3528         }
3529
3530         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
3531                               "Issue RSCN:       did:x%x",
3532                               ndlp->nlp_DID, 0, 0);
3533
3534         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
3535         if (rc == IOCB_ERROR) {
3536                 lpfc_els_free_iocb(phba, elsiocb);
3537                 lpfc_nlp_put(ndlp);
3538                 return 1;
3539         }
3540
3541         return 0;
3542 }
3543
3544 /**
3545  * lpfc_issue_els_farpr - Issue a farp to an node on a vport
3546  * @vport: pointer to a host virtual N_Port data structure.
3547  * @nportid: N_Port identifier to the remote node.
3548  * @retry: number of retries to the command IOCB.
3549  *
3550  * This routine issues a Fibre Channel Address Resolution Response
3551  * (FARPR) to a node on a vport. The remote node N_Port identifier (@nportid)
3552  * is passed into the function. It first search the @vport node list to find
3553  * the matching ndlp. If no such ndlp is found, a new ndlp shall be created
3554  * for this (FARPR) purpose. An IOCB is allocated, payload prepared, and the
3555  * lpfc_sli_issue_iocb() routine is invoked to send the FARPR ELS command.
3556  *
3557  * Note that the ndlp reference count will be incremented by 1 for holding the
3558  * ndlp and the reference to ndlp will be stored into the context1 field of
3559  * the IOCB for the completion callback function to the FARPR ELS command.
3560  *
3561  * Return code
3562  *   0 - Successfully issued farpr command
3563  *   1 - Failed to issue farpr command
3564  **/
3565 static int
3566 lpfc_issue_els_farpr(struct lpfc_vport *vport, uint32_t nportid, uint8_t retry)
3567 {
3568         int rc = 0;
3569         struct lpfc_hba  *phba = vport->phba;
3570         struct lpfc_iocbq *elsiocb;
3571         FARP *fp;
3572         uint8_t *pcmd;
3573         uint32_t *lp;
3574         uint16_t cmdsize;
3575         struct lpfc_nodelist *ondlp;
3576         struct lpfc_nodelist *ndlp;
3577
3578         cmdsize = (sizeof(uint32_t) + sizeof(FARP));
3579
3580         ndlp = lpfc_findnode_did(vport, nportid);
3581         if (!ndlp) {
3582                 ndlp = lpfc_nlp_init(vport, nportid);
3583                 if (!ndlp)
3584                         return 1;
3585                 lpfc_enqueue_node(vport, ndlp);
3586         }
3587
3588         elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, retry, ndlp,
3589                                      ndlp->nlp_DID, ELS_CMD_RNID);
3590         if (!elsiocb)
3591                 return 1;
3592
3593         pcmd = (uint8_t *) (((struct lpfc_dmabuf *) elsiocb->context2)->virt);
3594
3595         *((uint32_t *) (pcmd)) = ELS_CMD_FARPR;
3596         pcmd += sizeof(uint32_t);
3597
3598         /* Fill in FARPR payload */
3599         fp = (FARP *) (pcmd);
3600         memset(fp, 0, sizeof(FARP));
3601         lp = (uint32_t *) pcmd;
3602         *lp++ = be32_to_cpu(nportid);
3603         *lp++ = be32_to_cpu(vport->fc_myDID);
3604         fp->Rflags = 0;
3605         fp->Mflags = (FARP_MATCH_PORT | FARP_MATCH_NODE);
3606
3607         memcpy(&fp->RportName, &vport->fc_portname, sizeof(struct lpfc_name));
3608         memcpy(&fp->RnodeName, &vport->fc_nodename, sizeof(struct lpfc_name));
3609         ondlp = lpfc_findnode_did(vport, nportid);
3610         if (ondlp) {
3611                 memcpy(&fp->OportName, &ondlp->nlp_portname,
3612                        sizeof(struct lpfc_name));
3613                 memcpy(&fp->OnodeName, &ondlp->nlp_nodename,
3614                        sizeof(struct lpfc_name));
3615         }
3616
3617         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
3618                 "Issue FARPR:     did:x%x",
3619                 ndlp->nlp_DID, 0, 0);
3620
3621         phba->fc_stat.elsXmitFARPR++;
3622         elsiocb->iocb_cmpl = lpfc_cmpl_els_cmd;
3623         elsiocb->context1 = lpfc_nlp_get(ndlp);
3624         if (!elsiocb->context1) {
3625                 lpfc_els_free_iocb(phba, elsiocb);
3626                 return 1;
3627         }
3628
3629         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
3630         if (rc == IOCB_ERROR) {
3631                 /* The additional lpfc_nlp_put will cause the following
3632                  * lpfc_els_free_iocb routine to trigger the release of
3633                  * the node.
3634                  */
3635                 lpfc_els_free_iocb(phba, elsiocb);
3636                 lpfc_nlp_put(ndlp);
3637                 return 1;
3638         }
3639         /* This will cause the callback-function lpfc_cmpl_els_cmd to
3640          * trigger the release of the node.
3641          */
3642         /* Don't release reference count as RDF is likely outstanding */
3643         return 0;
3644 }
3645
3646 /**
3647  * lpfc_issue_els_rdf - Register for diagnostic functions from the fabric.
3648  * @vport: pointer to a host virtual N_Port data structure.
3649  * @retry: retry counter for the command IOCB.
3650  *
3651  * This routine issues an ELS RDF to the Fabric Controller to register
3652  * for diagnostic functions.
3653  *
3654  * Note that the ndlp reference count will be incremented by 1 for holding the
3655  * ndlp and the reference to ndlp will be stored into the context1 field of
3656  * the IOCB for the completion callback function to the RDF ELS command.
3657  *
3658  * Return code
3659  *   0 - Successfully issued rdf command
3660  *   1 - Failed to issue rdf command
3661  **/
3662 int
3663 lpfc_issue_els_rdf(struct lpfc_vport *vport, uint8_t retry)
3664 {
3665         struct lpfc_hba *phba = vport->phba;
3666         struct lpfc_iocbq *elsiocb;
3667         struct lpfc_els_rdf_req *prdf;
3668         struct lpfc_nodelist *ndlp;
3669         uint16_t cmdsize;
3670         int rc;
3671
3672         cmdsize = sizeof(*prdf);
3673
3674         ndlp = lpfc_findnode_did(vport, Fabric_Cntl_DID);
3675         if (!ndlp) {
3676                 ndlp = lpfc_nlp_init(vport, Fabric_Cntl_DID);
3677                 if (!ndlp)
3678                         return -ENODEV;
3679                 lpfc_enqueue_node(vport, ndlp);
3680         }
3681
3682         /* RDF ELS is not required on an NPIV VN_Port. */
3683         if (vport->port_type == LPFC_NPIV_PORT)
3684                 return -EACCES;
3685
3686         elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, retry, ndlp,
3687                                      ndlp->nlp_DID, ELS_CMD_RDF);
3688         if (!elsiocb)
3689                 return -ENOMEM;
3690
3691         /* Configure the payload for the supported FPIN events. */
3692         prdf = (struct lpfc_els_rdf_req *)
3693                 (((struct lpfc_dmabuf *)elsiocb->context2)->virt);
3694         memset(prdf, 0, cmdsize);
3695         prdf->rdf.fpin_cmd = ELS_RDF;
3696         prdf->rdf.desc_len = cpu_to_be32(sizeof(struct lpfc_els_rdf_req) -
3697                                          sizeof(struct fc_els_rdf));
3698         prdf->reg_d1.reg_desc.desc_tag = cpu_to_be32(ELS_DTAG_FPIN_REGISTER);
3699         prdf->reg_d1.reg_desc.desc_len = cpu_to_be32(
3700                                 FC_TLV_DESC_LENGTH_FROM_SZ(prdf->reg_d1));
3701         prdf->reg_d1.reg_desc.count = cpu_to_be32(ELS_RDF_REG_TAG_CNT);
3702         prdf->reg_d1.desc_tags[0] = cpu_to_be32(ELS_DTAG_LNK_INTEGRITY);
3703         prdf->reg_d1.desc_tags[1] = cpu_to_be32(ELS_DTAG_DELIVERY);
3704         prdf->reg_d1.desc_tags[2] = cpu_to_be32(ELS_DTAG_PEER_CONGEST);
3705         prdf->reg_d1.desc_tags[3] = cpu_to_be32(ELS_DTAG_CONGESTION);
3706
3707         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS | LOG_CGN_MGMT,
3708                          "6444 Xmit RDF to remote NPORT x%x Reg: %x %x\n",
3709                          ndlp->nlp_DID, phba->cgn_reg_signal,
3710                          phba->cgn_reg_fpin);
3711
3712         phba->cgn_fpin_frequency = LPFC_FPIN_INIT_FREQ;
3713         elsiocb->iocb_cmpl = lpfc_cmpl_els_disc_cmd;
3714         elsiocb->context1 = lpfc_nlp_get(ndlp);
3715         if (!elsiocb->context1) {
3716                 lpfc_els_free_iocb(phba, elsiocb);
3717                 return -EIO;
3718         }
3719
3720         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
3721                               "Issue RDF:     did:x%x refcnt %d",
3722                               ndlp->nlp_DID, kref_read(&ndlp->kref), 0);
3723
3724         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
3725         if (rc == IOCB_ERROR) {
3726                 lpfc_els_free_iocb(phba, elsiocb);
3727                 lpfc_nlp_put(ndlp);
3728                 return -EIO;
3729         }
3730         return 0;
3731 }
3732
3733  /**
3734   * lpfc_els_rcv_rdf - Receive RDF ELS request from the fabric.
3735   * @vport: pointer to a host virtual N_Port data structure.
3736   * @cmdiocb: pointer to lpfc command iocb data structure.
3737   * @ndlp: pointer to a node-list data structure.
3738   *
3739   * A received RDF implies a possible change to fabric supported diagnostic
3740   * functions.  This routine sends LS_ACC and then has the Nx_Port issue a new
3741   * RDF request to reregister for supported diagnostic functions.
3742   *
3743   * Return code
3744   *   0 - Success
3745   *   -EIO - Failed to process received RDF
3746   **/
3747 static int
3748 lpfc_els_rcv_rdf(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
3749                  struct lpfc_nodelist *ndlp)
3750 {
3751         /* Send LS_ACC */
3752         if (lpfc_els_rsp_acc(vport, ELS_CMD_RDF, cmdiocb, ndlp, NULL)) {
3753                 lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS | LOG_CGN_MGMT,
3754                                  "1623 Failed to RDF_ACC from x%x for x%x\n",
3755                                  ndlp->nlp_DID, vport->fc_myDID);
3756                 return -EIO;
3757         }
3758
3759         /* Issue new RDF for reregistering */
3760         if (lpfc_issue_els_rdf(vport, 0)) {
3761                 lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS | LOG_CGN_MGMT,
3762                                  "2623 Failed to re register RDF for x%x\n",
3763                                  vport->fc_myDID);
3764                 return -EIO;
3765         }
3766
3767         return 0;
3768 }
3769
3770 /**
3771  * lpfc_least_capable_settings - helper function for EDC rsp processing
3772  * @phba: pointer to lpfc hba data structure.
3773  * @pcgd: pointer to congestion detection descriptor in EDC rsp.
3774  *
3775  * This helper routine determines the least capable setting for
3776  * congestion signals, signal freq, including scale, from the
3777  * congestion detection descriptor in the EDC rsp.  The routine
3778  * sets @phba values in preparation for a set_featues mailbox.
3779  **/
3780 static void
3781 lpfc_least_capable_settings(struct lpfc_hba *phba,
3782                             struct fc_diag_cg_sig_desc *pcgd)
3783 {
3784         u32 rsp_sig_cap = 0, drv_sig_cap = 0;
3785         u32 rsp_sig_freq_cyc = 0, rsp_sig_freq_scale = 0;
3786         struct lpfc_cgn_info *cp;
3787         u32 crc;
3788         u16 sig_freq;
3789
3790         /* Get rsp signal and frequency capabilities.  */
3791         rsp_sig_cap = be32_to_cpu(pcgd->xmt_signal_capability);
3792         rsp_sig_freq_cyc = be16_to_cpu(pcgd->xmt_signal_frequency.count);
3793         rsp_sig_freq_scale = be16_to_cpu(pcgd->xmt_signal_frequency.units);
3794
3795         /* If the Fport does not support signals. Set FPIN only */
3796         if (rsp_sig_cap == EDC_CG_SIG_NOTSUPPORTED)
3797                 goto out_no_support;
3798
3799         /* Apply the xmt scale to the xmt cycle to get the correct frequency.
3800          * Adapter default is 100 millisSeconds.  Convert all xmt cycle values
3801          * to milliSeconds.
3802          */
3803         switch (rsp_sig_freq_scale) {
3804         case EDC_CG_SIGFREQ_SEC:
3805                 rsp_sig_freq_cyc *= MSEC_PER_SEC;
3806                 break;
3807         case EDC_CG_SIGFREQ_MSEC:
3808                 rsp_sig_freq_cyc = 1;
3809                 break;
3810         default:
3811                 goto out_no_support;
3812         }
3813
3814         /* Convenient shorthand. */
3815         drv_sig_cap = phba->cgn_reg_signal;
3816
3817         /* Choose the least capable frequency. */
3818         if (rsp_sig_freq_cyc > phba->cgn_sig_freq)
3819                 phba->cgn_sig_freq = rsp_sig_freq_cyc;
3820
3821         /* Should be some common signals support. Settle on least capable
3822          * signal and adjust FPIN values. Initialize defaults to ease the
3823          * decision.
3824          */
3825         phba->cgn_reg_fpin = LPFC_CGN_FPIN_WARN | LPFC_CGN_FPIN_ALARM;
3826         phba->cgn_reg_signal = EDC_CG_SIG_NOTSUPPORTED;
3827         if (rsp_sig_cap == EDC_CG_SIG_WARN_ONLY &&
3828             (drv_sig_cap == EDC_CG_SIG_WARN_ONLY ||
3829              drv_sig_cap == EDC_CG_SIG_WARN_ALARM)) {
3830                 phba->cgn_reg_signal = EDC_CG_SIG_WARN_ONLY;
3831                 phba->cgn_reg_fpin &= ~LPFC_CGN_FPIN_WARN;
3832         }
3833         if (rsp_sig_cap == EDC_CG_SIG_WARN_ALARM) {
3834                 if (drv_sig_cap == EDC_CG_SIG_WARN_ALARM) {
3835                         phba->cgn_reg_signal = EDC_CG_SIG_WARN_ALARM;
3836                         phba->cgn_reg_fpin = LPFC_CGN_FPIN_NONE;
3837                 }
3838                 if (drv_sig_cap == EDC_CG_SIG_WARN_ONLY) {
3839                         phba->cgn_reg_signal = EDC_CG_SIG_WARN_ONLY;
3840                         phba->cgn_reg_fpin &= ~LPFC_CGN_FPIN_WARN;
3841                 }
3842         }
3843
3844         if (!phba->cgn_i)
3845                 return;
3846
3847         /* Update signal frequency in congestion info buffer */
3848         cp = (struct lpfc_cgn_info *)phba->cgn_i->virt;
3849
3850         /* Frequency (in ms) Signal Warning/Signal Congestion Notifications
3851          * are received by the HBA
3852          */
3853         sig_freq = phba->cgn_sig_freq;
3854
3855         if (phba->cgn_reg_signal == EDC_CG_SIG_WARN_ONLY)
3856                 cp->cgn_warn_freq = cpu_to_le16(sig_freq);
3857         if (phba->cgn_reg_signal == EDC_CG_SIG_WARN_ALARM) {
3858                 cp->cgn_alarm_freq = cpu_to_le16(sig_freq);
3859                 cp->cgn_warn_freq = cpu_to_le16(sig_freq);
3860         }
3861         crc = lpfc_cgn_calc_crc32(cp, LPFC_CGN_INFO_SZ, LPFC_CGN_CRC32_SEED);
3862         cp->cgn_info_crc = cpu_to_le32(crc);
3863         return;
3864
3865 out_no_support:
3866         phba->cgn_reg_signal = EDC_CG_SIG_NOTSUPPORTED;
3867         phba->cgn_sig_freq = 0;
3868         phba->cgn_reg_fpin = LPFC_CGN_FPIN_ALARM | LPFC_CGN_FPIN_WARN;
3869 }
3870
3871 DECLARE_ENUM2STR_LOOKUP(lpfc_get_tlv_dtag_nm, fc_ls_tlv_dtag,
3872                         FC_LS_TLV_DTAG_INIT);
3873
3874 /**
3875  * lpfc_cmpl_els_edc - Completion callback function for EDC
3876  * @phba: pointer to lpfc hba data structure.
3877  * @cmdiocb: pointer to lpfc command iocb data structure.
3878  * @rspiocb: pointer to lpfc response iocb data structure.
3879  *
3880  * This routine is the completion callback function for issuing the Exchange
3881  * Diagnostic Capabilities (EDC) command. The driver issues an EDC to
3882  * notify the FPort of its Congestion and Link Fault capabilities.  This
3883  * routine parses the FPort's response and decides on the least common
3884  * values applicable to both FPort and NPort for Warnings and Alarms that
3885  * are communicated via hardware signals.
3886  **/
3887 static void
3888 lpfc_cmpl_els_edc(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
3889                   struct lpfc_iocbq *rspiocb)
3890 {
3891         IOCB_t *irsp;
3892         struct fc_els_edc_resp *edc_rsp;
3893         struct fc_tlv_desc *tlv;
3894         struct fc_diag_cg_sig_desc *pcgd;
3895         struct fc_diag_lnkflt_desc *plnkflt;
3896         struct lpfc_dmabuf *pcmd, *prsp;
3897         const char *dtag_nm;
3898         u32 *pdata, dtag;
3899         int desc_cnt = 0, bytes_remain;
3900         bool rcv_cap_desc = false;
3901         struct lpfc_nodelist *ndlp;
3902
3903         irsp = &rspiocb->iocb;
3904         ndlp = cmdiocb->context1;
3905
3906         lpfc_debugfs_disc_trc(phba->pport, LPFC_DISC_TRC_ELS_CMD,
3907                               "EDC cmpl:    status:x%x/x%x did:x%x",
3908                               irsp->ulpStatus, irsp->un.ulpWord[4],
3909                               irsp->un.elsreq64.remoteID);
3910
3911         /* ELS cmd tag <ulpIoTag> completes */
3912         lpfc_printf_log(phba, KERN_INFO, LOG_ELS | LOG_CGN_MGMT,
3913                         "4201 EDC cmd tag x%x completes Data: x%x x%x x%x\n",
3914                         irsp->ulpIoTag, irsp->ulpStatus,
3915                         irsp->un.ulpWord[4], irsp->ulpTimeout);
3916
3917         pcmd = (struct lpfc_dmabuf *)cmdiocb->context2;
3918         if (!pcmd)
3919                 goto out;
3920
3921         pdata = (u32 *)pcmd->virt;
3922         if (!pdata)
3923                 goto out;
3924
3925         /* Need to clear signal values, send features MB and RDF with FPIN. */
3926         if (irsp->ulpStatus)
3927                 goto out;
3928
3929         prsp = list_get_first(&pcmd->list, struct lpfc_dmabuf, list);
3930         if (!prsp)
3931                 goto out;
3932
3933         edc_rsp = prsp->virt;
3934         if (!edc_rsp)
3935                 goto out;
3936
3937         /* ELS cmd tag <ulpIoTag> completes */
3938         lpfc_printf_log(phba, KERN_INFO, LOG_ELS | LOG_CGN_MGMT,
3939                         "4676 Fabric EDC Rsp: "
3940                         "0x%02x, 0x%08x\n",
3941                         edc_rsp->acc_hdr.la_cmd,
3942                         be32_to_cpu(edc_rsp->desc_list_len));
3943
3944         /*
3945          * Payload length in bytes is the response descriptor list
3946          * length minus the 12 bytes of Link Service Request
3947          * Information descriptor in the reply.
3948          */
3949         bytes_remain = be32_to_cpu(edc_rsp->desc_list_len) -
3950                                    sizeof(struct fc_els_lsri_desc);
3951         if (bytes_remain <= 0)
3952                 goto out;
3953
3954         tlv = edc_rsp->desc;
3955
3956         /*
3957          * cycle through EDC diagnostic descriptors to find the
3958          * congestion signaling capability descriptor
3959          */
3960         while (bytes_remain) {
3961                 if (bytes_remain < FC_TLV_DESC_HDR_SZ) {
3962                         lpfc_printf_log(phba, KERN_WARNING, LOG_CGN_MGMT,
3963                                         "6461 Truncated TLV hdr on "
3964                                         "Diagnostic descriptor[%d]\n",
3965                                         desc_cnt);
3966                         goto out;
3967                 }
3968
3969                 dtag = be32_to_cpu(tlv->desc_tag);
3970                 switch (dtag) {
3971                 case ELS_DTAG_LNK_FAULT_CAP:
3972                         if (bytes_remain < FC_TLV_DESC_SZ_FROM_LENGTH(tlv) ||
3973                             FC_TLV_DESC_SZ_FROM_LENGTH(tlv) !=
3974                                         sizeof(struct fc_diag_lnkflt_desc)) {
3975                                 lpfc_printf_log(
3976                                         phba, KERN_WARNING, LOG_CGN_MGMT,
3977                                         "6462 Truncated Link Fault Diagnostic "
3978                                         "descriptor[%d]: %d vs 0x%zx 0x%zx\n",
3979                                         desc_cnt, bytes_remain,
3980                                         FC_TLV_DESC_SZ_FROM_LENGTH(tlv),
3981                                         sizeof(struct fc_diag_cg_sig_desc));
3982                                 goto out;
3983                         }
3984                         plnkflt = (struct fc_diag_lnkflt_desc *)tlv;
3985                         lpfc_printf_log(
3986                                 phba, KERN_INFO, LOG_ELS | LOG_CGN_MGMT,
3987                                 "4617 Link Fault Desc Data: 0x%08x 0x%08x "
3988                                 "0x%08x 0x%08x 0x%08x\n",
3989                                 be32_to_cpu(plnkflt->desc_tag),
3990                                 be32_to_cpu(plnkflt->desc_len),
3991                                 be32_to_cpu(
3992                                         plnkflt->degrade_activate_threshold),
3993                                 be32_to_cpu(
3994                                         plnkflt->degrade_deactivate_threshold),
3995                                 be32_to_cpu(plnkflt->fec_degrade_interval));
3996                         break;
3997                 case ELS_DTAG_CG_SIGNAL_CAP:
3998                         if (bytes_remain < FC_TLV_DESC_SZ_FROM_LENGTH(tlv) ||
3999                             FC_TLV_DESC_SZ_FROM_LENGTH(tlv) !=
4000                                         sizeof(struct fc_diag_cg_sig_desc)) {
4001                                 lpfc_printf_log(
4002                                         phba, KERN_WARNING, LOG_CGN_MGMT,
4003                                         "6463 Truncated Cgn Signal Diagnostic "
4004                                         "descriptor[%d]: %d vs 0x%zx 0x%zx\n",
4005                                         desc_cnt, bytes_remain,
4006                                         FC_TLV_DESC_SZ_FROM_LENGTH(tlv),
4007                                         sizeof(struct fc_diag_cg_sig_desc));
4008                                 goto out;
4009                         }
4010
4011                         pcgd = (struct fc_diag_cg_sig_desc *)tlv;
4012                         lpfc_printf_log(
4013                                 phba, KERN_INFO, LOG_ELS | LOG_CGN_MGMT,
4014                                 "4616 CGN Desc Data: 0x%08x 0x%08x "
4015                                 "0x%08x 0x%04x 0x%04x 0x%08x 0x%04x 0x%04x\n",
4016                                 be32_to_cpu(pcgd->desc_tag),
4017                                 be32_to_cpu(pcgd->desc_len),
4018                                 be32_to_cpu(pcgd->xmt_signal_capability),
4019                                 be16_to_cpu(pcgd->xmt_signal_frequency.count),
4020                                 be16_to_cpu(pcgd->xmt_signal_frequency.units),
4021                                 be32_to_cpu(pcgd->rcv_signal_capability),
4022                                 be16_to_cpu(pcgd->rcv_signal_frequency.count),
4023                                 be16_to_cpu(pcgd->rcv_signal_frequency.units));
4024
4025                         /* Compare driver and Fport capabilities and choose
4026                          * least common.
4027                          */
4028                         lpfc_least_capable_settings(phba, pcgd);
4029                         rcv_cap_desc = true;
4030                         break;
4031                 default:
4032                         dtag_nm = lpfc_get_tlv_dtag_nm(dtag);
4033                         lpfc_printf_log(phba, KERN_WARNING, LOG_CGN_MGMT,
4034                                         "4919 unknown Diagnostic "
4035                                         "Descriptor[%d]: tag x%x (%s)\n",
4036                                         desc_cnt, dtag, dtag_nm);
4037                 }
4038
4039                 bytes_remain -= FC_TLV_DESC_SZ_FROM_LENGTH(tlv);
4040                 tlv = fc_tlv_next_desc(tlv);
4041                 desc_cnt++;
4042         }
4043
4044 out:
4045         if (!rcv_cap_desc) {
4046                 phba->cgn_reg_fpin = LPFC_CGN_FPIN_ALARM | LPFC_CGN_FPIN_WARN;
4047                 phba->cgn_reg_signal = EDC_CG_SIG_NOTSUPPORTED;
4048                 phba->cgn_sig_freq = 0;
4049                 lpfc_printf_log(phba, KERN_WARNING, LOG_ELS | LOG_CGN_MGMT,
4050                                 "4202 EDC rsp error - sending RDF "
4051                                 "for FPIN only.\n");
4052         }
4053
4054         lpfc_config_cgn_signal(phba);
4055
4056         /* Check to see if link went down during discovery */
4057         lpfc_els_chk_latt(phba->pport);
4058         lpfc_debugfs_disc_trc(phba->pport, LPFC_DISC_TRC_ELS_CMD,
4059                               "EDC Cmpl:     did:x%x refcnt %d",
4060                               ndlp->nlp_DID, kref_read(&ndlp->kref), 0);
4061         lpfc_els_free_iocb(phba, cmdiocb);
4062         lpfc_nlp_put(ndlp);
4063 }
4064
4065 static void
4066 lpfc_format_edc_cgn_desc(struct lpfc_hba *phba, struct fc_diag_cg_sig_desc *cgd)
4067 {
4068         /* We are assuming cgd was zero'ed before calling this routine */
4069
4070         /* Configure the congestion detection capability */
4071         cgd->desc_tag = cpu_to_be32(ELS_DTAG_CG_SIGNAL_CAP);
4072
4073         /* Descriptor len doesn't include the tag or len fields. */
4074         cgd->desc_len = cpu_to_be32(
4075                 FC_TLV_DESC_LENGTH_FROM_SZ(struct fc_diag_cg_sig_desc));
4076
4077         /* xmt_signal_capability already set to EDC_CG_SIG_NOTSUPPORTED.
4078          * xmt_signal_frequency.count already set to 0.
4079          * xmt_signal_frequency.units already set to 0.
4080          */
4081
4082         if (phba->cmf_active_mode == LPFC_CFG_OFF) {
4083                 /* rcv_signal_capability already set to EDC_CG_SIG_NOTSUPPORTED.
4084                  * rcv_signal_frequency.count already set to 0.
4085                  * rcv_signal_frequency.units already set to 0.
4086                  */
4087                 phba->cgn_sig_freq = 0;
4088                 return;
4089         }
4090         switch (phba->cgn_reg_signal) {
4091         case EDC_CG_SIG_WARN_ONLY:
4092                 cgd->rcv_signal_capability = cpu_to_be32(EDC_CG_SIG_WARN_ONLY);
4093                 break;
4094         case EDC_CG_SIG_WARN_ALARM:
4095                 cgd->rcv_signal_capability = cpu_to_be32(EDC_CG_SIG_WARN_ALARM);
4096                 break;
4097         default:
4098                 /* rcv_signal_capability left 0 thus no support */
4099                 break;
4100         }
4101
4102         /* We start negotiation with lpfc_fabric_cgn_frequency, after
4103          * the completion we settle on the higher frequency.
4104          */
4105         cgd->rcv_signal_frequency.count =
4106                 cpu_to_be16(lpfc_fabric_cgn_frequency);
4107         cgd->rcv_signal_frequency.units =
4108                 cpu_to_be16(EDC_CG_SIGFREQ_MSEC);
4109 }
4110
4111  /**
4112   * lpfc_issue_els_edc - Exchange Diagnostic Capabilities with the fabric.
4113   * @vport: pointer to a host virtual N_Port data structure.
4114   * @retry: retry counter for the command iocb.
4115   *
4116   * This routine issues an ELS EDC to the F-Port Controller to communicate
4117   * this N_Port's support of hardware signals in its Congestion
4118   * Capabilities Descriptor.
4119   *
4120   * Note: This routine does not check if one or more signals are
4121   * set in the cgn_reg_signal parameter.  The caller makes the
4122   * decision to enforce cgn_reg_signal as nonzero or zero depending
4123   * on the conditions.  During Fabric requests, the driver
4124   * requires cgn_reg_signals to be nonzero.  But a dynamic request
4125   * to set the congestion mode to OFF from Monitor or Manage
4126   * would correctly issue an EDC with no signals enabled to
4127   * turn off switch functionality and then update the FW.
4128   *
4129   * Return code
4130   *   0 - Successfully issued edc command
4131   *   1 - Failed to issue edc command
4132   **/
4133 int
4134 lpfc_issue_els_edc(struct lpfc_vport *vport, uint8_t retry)
4135 {
4136         struct lpfc_hba  *phba = vport->phba;
4137         struct lpfc_iocbq *elsiocb;
4138         struct lpfc_els_edc_req *edc_req;
4139         struct fc_diag_cg_sig_desc *cgn_desc;
4140         u16 cmdsize;
4141         struct lpfc_nodelist *ndlp;
4142         u8 *pcmd = NULL;
4143         u32 edc_req_size, cgn_desc_size;
4144         int rc;
4145
4146         if (vport->port_type == LPFC_NPIV_PORT)
4147                 return -EACCES;
4148
4149         ndlp = lpfc_findnode_did(vport, Fabric_DID);
4150         if (!ndlp || ndlp->nlp_state != NLP_STE_UNMAPPED_NODE)
4151                 return -ENODEV;
4152
4153         /* If HBA doesn't support signals, drop into RDF */
4154         if (!phba->cgn_init_reg_signal)
4155                 goto try_rdf;
4156
4157         edc_req_size = sizeof(struct fc_els_edc);
4158         cgn_desc_size = sizeof(struct fc_diag_cg_sig_desc);
4159         cmdsize = edc_req_size + cgn_desc_size;
4160         elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, retry, ndlp,
4161                                      ndlp->nlp_DID, ELS_CMD_EDC);
4162         if (!elsiocb)
4163                 goto try_rdf;
4164
4165         /* Configure the payload for the supported Diagnostics capabilities. */
4166         pcmd = (u8 *)(((struct lpfc_dmabuf *)elsiocb->context2)->virt);
4167         memset(pcmd, 0, cmdsize);
4168         edc_req = (struct lpfc_els_edc_req *)pcmd;
4169         edc_req->edc.desc_len = cpu_to_be32(cgn_desc_size);
4170         edc_req->edc.edc_cmd = ELS_EDC;
4171
4172         cgn_desc = &edc_req->cgn_desc;
4173
4174         lpfc_format_edc_cgn_desc(phba, cgn_desc);
4175
4176         phba->cgn_sig_freq = lpfc_fabric_cgn_frequency;
4177
4178         lpfc_printf_vlog(vport, KERN_INFO, LOG_CGN_MGMT,
4179                          "4623 Xmit EDC to remote "
4180                          "NPORT x%x reg_sig x%x reg_fpin:x%x\n",
4181                          ndlp->nlp_DID, phba->cgn_reg_signal,
4182                          phba->cgn_reg_fpin);
4183
4184         elsiocb->iocb_cmpl = lpfc_cmpl_els_disc_cmd;
4185         elsiocb->context1 = lpfc_nlp_get(ndlp);
4186         if (!elsiocb->context1) {
4187                 lpfc_els_free_iocb(phba, elsiocb);
4188                 return -EIO;
4189         }
4190
4191         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
4192                               "Issue EDC:     did:x%x refcnt %d",
4193                               ndlp->nlp_DID, kref_read(&ndlp->kref), 0);
4194         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
4195         if (rc == IOCB_ERROR) {
4196                 /* The additional lpfc_nlp_put will cause the following
4197                  * lpfc_els_free_iocb routine to trigger the rlease of
4198                  * the node.
4199                  */
4200                 lpfc_els_free_iocb(phba, elsiocb);
4201                 lpfc_nlp_put(ndlp);
4202                 goto try_rdf;
4203         }
4204         return 0;
4205 try_rdf:
4206         phba->cgn_reg_fpin = LPFC_CGN_FPIN_WARN | LPFC_CGN_FPIN_ALARM;
4207         phba->cgn_reg_signal = EDC_CG_SIG_NOTSUPPORTED;
4208         rc = lpfc_issue_els_rdf(vport, 0);
4209         return rc;
4210 }
4211
4212 /**
4213  * lpfc_cancel_retry_delay_tmo - Cancel the timer with delayed iocb-cmd retry
4214  * @vport: pointer to a host virtual N_Port data structure.
4215  * @nlp: pointer to a node-list data structure.
4216  *
4217  * This routine cancels the timer with a delayed IOCB-command retry for
4218  * a @vport's @ndlp. It stops the timer for the delayed function retrial and
4219  * removes the ELS retry event if it presents. In addition, if the
4220  * NLP_NPR_2B_DISC bit is set in the @nlp's nlp_flag bitmap, ADISC IOCB
4221  * commands are sent for the @vport's nodes that require issuing discovery
4222  * ADISC.
4223  **/
4224 void
4225 lpfc_cancel_retry_delay_tmo(struct lpfc_vport *vport, struct lpfc_nodelist *nlp)
4226 {
4227         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
4228         struct lpfc_work_evt *evtp;
4229
4230         if (!(nlp->nlp_flag & NLP_DELAY_TMO))
4231                 return;
4232         spin_lock_irq(&nlp->lock);
4233         nlp->nlp_flag &= ~NLP_DELAY_TMO;
4234         spin_unlock_irq(&nlp->lock);
4235         del_timer_sync(&nlp->nlp_delayfunc);
4236         nlp->nlp_last_elscmd = 0;
4237         if (!list_empty(&nlp->els_retry_evt.evt_listp)) {
4238                 list_del_init(&nlp->els_retry_evt.evt_listp);
4239                 /* Decrement nlp reference count held for the delayed retry */
4240                 evtp = &nlp->els_retry_evt;
4241                 lpfc_nlp_put((struct lpfc_nodelist *)evtp->evt_arg1);
4242         }
4243         if (nlp->nlp_flag & NLP_NPR_2B_DISC) {
4244                 spin_lock_irq(&nlp->lock);
4245                 nlp->nlp_flag &= ~NLP_NPR_2B_DISC;
4246                 spin_unlock_irq(&nlp->lock);
4247                 if (vport->num_disc_nodes) {
4248                         if (vport->port_state < LPFC_VPORT_READY) {
4249                                 /* Check if there are more ADISCs to be sent */
4250                                 lpfc_more_adisc(vport);
4251                         } else {
4252                                 /* Check if there are more PLOGIs to be sent */
4253                                 lpfc_more_plogi(vport);
4254                                 if (vport->num_disc_nodes == 0) {
4255                                         spin_lock_irq(shost->host_lock);
4256                                         vport->fc_flag &= ~FC_NDISC_ACTIVE;
4257                                         spin_unlock_irq(shost->host_lock);
4258                                         lpfc_can_disctmo(vport);
4259                                         lpfc_end_rscn(vport);
4260                                 }
4261                         }
4262                 }
4263         }
4264         return;
4265 }
4266
4267 /**
4268  * lpfc_els_retry_delay - Timer function with a ndlp delayed function timer
4269  * @t: pointer to the timer function associated data (ndlp).
4270  *
4271  * This routine is invoked by the ndlp delayed-function timer to check
4272  * whether there is any pending ELS retry event(s) with the node. If not, it
4273  * simply returns. Otherwise, if there is at least one ELS delayed event, it
4274  * adds the delayed events to the HBA work list and invokes the
4275  * lpfc_worker_wake_up() routine to wake up worker thread to process the
4276  * event. Note that lpfc_nlp_get() is called before posting the event to
4277  * the work list to hold reference count of ndlp so that it guarantees the
4278  * reference to ndlp will still be available when the worker thread gets
4279  * to the event associated with the ndlp.
4280  **/
4281 void
4282 lpfc_els_retry_delay(struct timer_list *t)
4283 {
4284         struct lpfc_nodelist *ndlp = from_timer(ndlp, t, nlp_delayfunc);
4285         struct lpfc_vport *vport = ndlp->vport;
4286         struct lpfc_hba   *phba = vport->phba;
4287         unsigned long flags;
4288         struct lpfc_work_evt  *evtp = &ndlp->els_retry_evt;
4289
4290         spin_lock_irqsave(&phba->hbalock, flags);
4291         if (!list_empty(&evtp->evt_listp)) {
4292                 spin_unlock_irqrestore(&phba->hbalock, flags);
4293                 return;
4294         }
4295
4296         /* We need to hold the node by incrementing the reference
4297          * count until the queued work is done
4298          */
4299         evtp->evt_arg1  = lpfc_nlp_get(ndlp);
4300         if (evtp->evt_arg1) {
4301                 evtp->evt = LPFC_EVT_ELS_RETRY;
4302                 list_add_tail(&evtp->evt_listp, &phba->work_list);
4303                 lpfc_worker_wake_up(phba);
4304         }
4305         spin_unlock_irqrestore(&phba->hbalock, flags);
4306         return;
4307 }
4308
4309 /**
4310  * lpfc_els_retry_delay_handler - Work thread handler for ndlp delayed function
4311  * @ndlp: pointer to a node-list data structure.
4312  *
4313  * This routine is the worker-thread handler for processing the @ndlp delayed
4314  * event(s), posted by the lpfc_els_retry_delay() routine. It simply retrieves
4315  * the last ELS command from the associated ndlp and invokes the proper ELS
4316  * function according to the delayed ELS command to retry the command.
4317  **/
4318 void
4319 lpfc_els_retry_delay_handler(struct lpfc_nodelist *ndlp)
4320 {
4321         struct lpfc_vport *vport = ndlp->vport;
4322         uint32_t cmd, retry;
4323
4324         spin_lock_irq(&ndlp->lock);
4325         cmd = ndlp->nlp_last_elscmd;
4326         ndlp->nlp_last_elscmd = 0;
4327
4328         if (!(ndlp->nlp_flag & NLP_DELAY_TMO)) {
4329                 spin_unlock_irq(&ndlp->lock);
4330                 return;
4331         }
4332
4333         ndlp->nlp_flag &= ~NLP_DELAY_TMO;
4334         spin_unlock_irq(&ndlp->lock);
4335         /*
4336          * If a discovery event readded nlp_delayfunc after timer
4337          * firing and before processing the timer, cancel the
4338          * nlp_delayfunc.
4339          */
4340         del_timer_sync(&ndlp->nlp_delayfunc);
4341         retry = ndlp->nlp_retry;
4342         ndlp->nlp_retry = 0;
4343
4344         switch (cmd) {
4345         case ELS_CMD_FLOGI:
4346                 lpfc_issue_els_flogi(vport, ndlp, retry);
4347                 break;
4348         case ELS_CMD_PLOGI:
4349                 if (!lpfc_issue_els_plogi(vport, ndlp->nlp_DID, retry)) {
4350                         ndlp->nlp_prev_state = ndlp->nlp_state;
4351                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
4352                 }
4353                 break;
4354         case ELS_CMD_ADISC:
4355                 if (!lpfc_issue_els_adisc(vport, ndlp, retry)) {
4356                         ndlp->nlp_prev_state = ndlp->nlp_state;
4357                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_ADISC_ISSUE);
4358                 }
4359                 break;
4360         case ELS_CMD_PRLI:
4361         case ELS_CMD_NVMEPRLI:
4362                 if (!lpfc_issue_els_prli(vport, ndlp, retry)) {
4363                         ndlp->nlp_prev_state = ndlp->nlp_state;
4364                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_PRLI_ISSUE);
4365                 }
4366                 break;
4367         case ELS_CMD_LOGO:
4368                 if (!lpfc_issue_els_logo(vport, ndlp, retry)) {
4369                         ndlp->nlp_prev_state = ndlp->nlp_state;
4370                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_LOGO_ISSUE);
4371                 }
4372                 break;
4373         case ELS_CMD_FDISC:
4374                 if (!(vport->fc_flag & FC_VPORT_NEEDS_INIT_VPI))
4375                         lpfc_issue_els_fdisc(vport, ndlp, retry);
4376                 break;
4377         }
4378         return;
4379 }
4380
4381 /**
4382  * lpfc_link_reset - Issue link reset
4383  * @vport: pointer to a virtual N_Port data structure.
4384  *
4385  * This routine performs link reset by sending INIT_LINK mailbox command.
4386  * For SLI-3 adapter, link attention interrupt is enabled before issuing
4387  * INIT_LINK mailbox command.
4388  *
4389  * Return code
4390  *   0 - Link reset initiated successfully
4391  *   1 - Failed to initiate link reset
4392  **/
4393 int
4394 lpfc_link_reset(struct lpfc_vport *vport)
4395 {
4396         struct lpfc_hba *phba = vport->phba;
4397         LPFC_MBOXQ_t *mbox;
4398         uint32_t control;
4399         int rc;
4400
4401         lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
4402                          "2851 Attempt link reset\n");
4403         mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
4404         if (!mbox) {
4405                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
4406                                 "2852 Failed to allocate mbox memory");
4407                 return 1;
4408         }
4409
4410         /* Enable Link attention interrupts */
4411         if (phba->sli_rev <= LPFC_SLI_REV3) {
4412                 spin_lock_irq(&phba->hbalock);
4413                 phba->sli.sli_flag |= LPFC_PROCESS_LA;
4414                 control = readl(phba->HCregaddr);
4415                 control |= HC_LAINT_ENA;
4416                 writel(control, phba->HCregaddr);
4417                 readl(phba->HCregaddr); /* flush */
4418                 spin_unlock_irq(&phba->hbalock);
4419         }
4420
4421         lpfc_init_link(phba, mbox, phba->cfg_topology,
4422                        phba->cfg_link_speed);
4423         mbox->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
4424         mbox->vport = vport;
4425         rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
4426         if ((rc != MBX_BUSY) && (rc != MBX_SUCCESS)) {
4427                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
4428                                 "2853 Failed to issue INIT_LINK "
4429                                 "mbox command, rc:x%x\n", rc);
4430                 mempool_free(mbox, phba->mbox_mem_pool);
4431                 return 1;
4432         }
4433
4434         return 0;
4435 }
4436
4437 /**
4438  * lpfc_els_retry - Make retry decision on an els command iocb
4439  * @phba: pointer to lpfc hba data structure.
4440  * @cmdiocb: pointer to lpfc command iocb data structure.
4441  * @rspiocb: pointer to lpfc response iocb data structure.
4442  *
4443  * This routine makes a retry decision on an ELS command IOCB, which has
4444  * failed. The following ELS IOCBs use this function for retrying the command
4445  * when previously issued command responsed with error status: FLOGI, PLOGI,
4446  * PRLI, ADISC and FDISC. Based on the ELS command type and the
4447  * returned error status, it makes the decision whether a retry shall be
4448  * issued for the command, and whether a retry shall be made immediately or
4449  * delayed. In the former case, the corresponding ELS command issuing-function
4450  * is called to retry the command. In the later case, the ELS command shall
4451  * be posted to the ndlp delayed event and delayed function timer set to the
4452  * ndlp for the delayed command issusing.
4453  *
4454  * Return code
4455  *   0 - No retry of els command is made
4456  *   1 - Immediate or delayed retry of els command is made
4457  **/
4458 static int
4459 lpfc_els_retry(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
4460                struct lpfc_iocbq *rspiocb)
4461 {
4462         struct lpfc_vport *vport = cmdiocb->vport;
4463         IOCB_t *irsp = &rspiocb->iocb;
4464         struct lpfc_nodelist *ndlp = (struct lpfc_nodelist *) cmdiocb->context1;
4465         struct lpfc_dmabuf *pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
4466         uint32_t *elscmd;
4467         struct ls_rjt stat;
4468         int retry = 0, maxretry = lpfc_max_els_tries, delay = 0;
4469         int logerr = 0;
4470         uint32_t cmd = 0;
4471         uint32_t did;
4472         int link_reset = 0, rc;
4473
4474
4475         /* Note: context2 may be 0 for internal driver abort
4476          * of delays ELS command.
4477          */
4478
4479         if (pcmd && pcmd->virt) {
4480                 elscmd = (uint32_t *) (pcmd->virt);
4481                 cmd = *elscmd++;
4482         }
4483
4484         if (ndlp)
4485                 did = ndlp->nlp_DID;
4486         else {
4487                 /* We should only hit this case for retrying PLOGI */
4488                 did = irsp->un.elsreq64.remoteID;
4489                 ndlp = lpfc_findnode_did(vport, did);
4490                 if (!ndlp && (cmd != ELS_CMD_PLOGI))
4491                         return 0;
4492         }
4493
4494         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
4495                 "Retry ELS:       wd7:x%x wd4:x%x did:x%x",
4496                 *(((uint32_t *)irsp) + 7), irsp->un.ulpWord[4], did);
4497
4498         switch (irsp->ulpStatus) {
4499         case IOSTAT_FCP_RSP_ERROR:
4500                 break;
4501         case IOSTAT_REMOTE_STOP:
4502                 if (phba->sli_rev == LPFC_SLI_REV4) {
4503                         /* This IO was aborted by the target, we don't
4504                          * know the rxid and because we did not send the
4505                          * ABTS we cannot generate and RRQ.
4506                          */
4507                         lpfc_set_rrq_active(phba, ndlp,
4508                                          cmdiocb->sli4_lxritag, 0, 0);
4509                 }
4510                 break;
4511         case IOSTAT_LOCAL_REJECT:
4512                 switch ((irsp->un.ulpWord[4] & IOERR_PARAM_MASK)) {
4513                 case IOERR_LOOP_OPEN_FAILURE:
4514                         if (cmd == ELS_CMD_FLOGI) {
4515                                 if (PCI_DEVICE_ID_HORNET ==
4516                                         phba->pcidev->device) {
4517                                         phba->fc_topology = LPFC_TOPOLOGY_LOOP;
4518                                         phba->pport->fc_myDID = 0;
4519                                         phba->alpa_map[0] = 0;
4520                                         phba->alpa_map[1] = 0;
4521                                 }
4522                         }
4523                         if (cmd == ELS_CMD_PLOGI && cmdiocb->retry == 0)
4524                                 delay = 1000;
4525                         retry = 1;
4526                         break;
4527
4528                 case IOERR_ILLEGAL_COMMAND:
4529                         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
4530                                          "0124 Retry illegal cmd x%x "
4531                                          "retry:x%x delay:x%x\n",
4532                                          cmd, cmdiocb->retry, delay);
4533                         retry = 1;
4534                         /* All command's retry policy */
4535                         maxretry = 8;
4536                         if (cmdiocb->retry > 2)
4537                                 delay = 1000;
4538                         break;
4539
4540                 case IOERR_NO_RESOURCES:
4541                         logerr = 1; /* HBA out of resources */
4542                         retry = 1;
4543                         if (cmdiocb->retry > 100)
4544                                 delay = 100;
4545                         maxretry = 250;
4546                         break;
4547
4548                 case IOERR_ILLEGAL_FRAME:
4549                         delay = 100;
4550                         retry = 1;
4551                         break;
4552
4553                 case IOERR_INVALID_RPI:
4554                         if (cmd == ELS_CMD_PLOGI &&
4555                             did == NameServer_DID) {
4556                                 /* Continue forever if plogi to */
4557                                 /* the nameserver fails */
4558                                 maxretry = 0;
4559                                 delay = 100;
4560                         }
4561                         retry = 1;
4562                         break;
4563
4564                 case IOERR_SEQUENCE_TIMEOUT:
4565                         if (cmd == ELS_CMD_PLOGI &&
4566                             did == NameServer_DID &&
4567                             (cmdiocb->retry + 1) == maxretry) {
4568                                 /* Reset the Link */
4569                                 link_reset = 1;
4570                                 break;
4571                         }
4572                         retry = 1;
4573                         delay = 100;
4574                         break;
4575                 case IOERR_SLI_ABORTED:
4576                         /* Retry ELS PLOGI command?
4577                          * Possibly the rport just wasn't ready.
4578                          */
4579                         if (cmd == ELS_CMD_PLOGI) {
4580                                 /* No retry if state change */
4581                                 if (ndlp &&
4582                                     ndlp->nlp_state != NLP_STE_PLOGI_ISSUE)
4583                                         goto out_retry;
4584                                 retry = 1;
4585                                 maxretry = 2;
4586                         }
4587                         break;
4588                 }
4589                 break;
4590
4591         case IOSTAT_NPORT_RJT:
4592         case IOSTAT_FABRIC_RJT:
4593                 if (irsp->un.ulpWord[4] & RJT_UNAVAIL_TEMP) {
4594                         retry = 1;
4595                         break;
4596                 }
4597                 break;
4598
4599         case IOSTAT_NPORT_BSY:
4600         case IOSTAT_FABRIC_BSY:
4601                 logerr = 1; /* Fabric / Remote NPort out of resources */
4602                 retry = 1;
4603                 break;
4604
4605         case IOSTAT_LS_RJT:
4606                 stat.un.lsRjtError = be32_to_cpu(irsp->un.ulpWord[4]);
4607                 /* Added for Vendor specifc support
4608                  * Just keep retrying for these Rsn / Exp codes
4609                  */
4610                 switch (stat.un.b.lsRjtRsnCode) {
4611                 case LSRJT_UNABLE_TPC:
4612                         /* The driver has a VALID PLOGI but the rport has
4613                          * rejected the PRLI - can't do it now.  Delay
4614                          * for 1 second and try again.
4615                          *
4616                          * However, if explanation is REQ_UNSUPPORTED there's
4617                          * no point to retry PRLI.
4618                          */
4619                         if ((cmd == ELS_CMD_PRLI || cmd == ELS_CMD_NVMEPRLI) &&
4620                             stat.un.b.lsRjtRsnCodeExp !=
4621                             LSEXP_REQ_UNSUPPORTED) {
4622                                 delay = 1000;
4623                                 maxretry = lpfc_max_els_tries + 1;
4624                                 retry = 1;
4625                                 break;
4626                         }
4627
4628                         /* Legacy bug fix code for targets with PLOGI delays. */
4629                         if (stat.un.b.lsRjtRsnCodeExp ==
4630                             LSEXP_CMD_IN_PROGRESS) {
4631                                 if (cmd == ELS_CMD_PLOGI) {
4632                                         delay = 1000;
4633                                         maxretry = 48;
4634                                 }
4635                                 retry = 1;
4636                                 break;
4637                         }
4638                         if (stat.un.b.lsRjtRsnCodeExp ==
4639                             LSEXP_CANT_GIVE_DATA) {
4640                                 if (cmd == ELS_CMD_PLOGI) {
4641                                         delay = 1000;
4642                                         maxretry = 48;
4643                                 }
4644                                 retry = 1;
4645                                 break;
4646                         }
4647                         if (cmd == ELS_CMD_PLOGI) {
4648                                 delay = 1000;
4649                                 maxretry = lpfc_max_els_tries + 1;
4650                                 retry = 1;
4651                                 break;
4652                         }
4653                         if ((phba->sli3_options & LPFC_SLI3_NPIV_ENABLED) &&
4654                           (cmd == ELS_CMD_FDISC) &&
4655                           (stat.un.b.lsRjtRsnCodeExp == LSEXP_OUT_OF_RESOURCE)){
4656                                 lpfc_printf_vlog(vport, KERN_ERR,
4657                                                  LOG_TRACE_EVENT,
4658                                                  "0125 FDISC Failed (x%x). "
4659                                                  "Fabric out of resources\n",
4660                                                  stat.un.lsRjtError);
4661                                 lpfc_vport_set_state(vport,
4662                                                      FC_VPORT_NO_FABRIC_RSCS);
4663                         }
4664                         break;
4665
4666                 case LSRJT_LOGICAL_BSY:
4667                         if ((cmd == ELS_CMD_PLOGI) ||
4668                             (cmd == ELS_CMD_PRLI) ||
4669                             (cmd == ELS_CMD_NVMEPRLI)) {
4670                                 delay = 1000;
4671                                 maxretry = 48;
4672                         } else if (cmd == ELS_CMD_FDISC) {
4673                                 /* FDISC retry policy */
4674                                 maxretry = 48;
4675                                 if (cmdiocb->retry >= 32)
4676                                         delay = 1000;
4677                         }
4678                         retry = 1;
4679                         break;
4680
4681                 case LSRJT_LOGICAL_ERR:
4682                         /* There are some cases where switches return this
4683                          * error when they are not ready and should be returning
4684                          * Logical Busy. We should delay every time.
4685                          */
4686                         if (cmd == ELS_CMD_FDISC &&
4687                             stat.un.b.lsRjtRsnCodeExp == LSEXP_PORT_LOGIN_REQ) {
4688                                 maxretry = 3;
4689                                 delay = 1000;
4690                                 retry = 1;
4691                         } else if (cmd == ELS_CMD_FLOGI &&
4692                                    stat.un.b.lsRjtRsnCodeExp ==
4693                                                 LSEXP_NOTHING_MORE) {
4694                                 vport->fc_sparam.cmn.bbRcvSizeMsb &= 0xf;
4695                                 retry = 1;
4696                                 lpfc_printf_vlog(vport, KERN_ERR,
4697                                                  LOG_TRACE_EVENT,
4698                                                  "0820 FLOGI Failed (x%x). "
4699                                                  "BBCredit Not Supported\n",
4700                                                  stat.un.lsRjtError);
4701                         }
4702                         break;
4703
4704                 case LSRJT_PROTOCOL_ERR:
4705                         if ((phba->sli3_options & LPFC_SLI3_NPIV_ENABLED) &&
4706                           (cmd == ELS_CMD_FDISC) &&
4707                           ((stat.un.b.lsRjtRsnCodeExp == LSEXP_INVALID_PNAME) ||
4708                           (stat.un.b.lsRjtRsnCodeExp == LSEXP_INVALID_NPORT_ID))
4709                           ) {
4710                                 lpfc_printf_vlog(vport, KERN_ERR,
4711                                                  LOG_TRACE_EVENT,
4712                                                  "0122 FDISC Failed (x%x). "
4713                                                  "Fabric Detected Bad WWN\n",
4714                                                  stat.un.lsRjtError);
4715                                 lpfc_vport_set_state(vport,
4716                                                      FC_VPORT_FABRIC_REJ_WWN);
4717                         }
4718                         break;
4719                 case LSRJT_VENDOR_UNIQUE:
4720                         if ((stat.un.b.vendorUnique == 0x45) &&
4721                             (cmd == ELS_CMD_FLOGI)) {
4722                                 goto out_retry;
4723                         }
4724                         break;
4725                 case LSRJT_CMD_UNSUPPORTED:
4726                         /* lpfc nvmet returns this type of LS_RJT when it
4727                          * receives an FCP PRLI because lpfc nvmet only
4728                          * support NVME.  ELS request is terminated for FCP4
4729                          * on this rport.
4730                          */
4731                         if (stat.un.b.lsRjtRsnCodeExp ==
4732                             LSEXP_REQ_UNSUPPORTED && cmd == ELS_CMD_PRLI) {
4733                                 spin_lock_irq(&ndlp->lock);
4734                                 ndlp->nlp_flag |= NLP_FCP_PRLI_RJT;
4735                                 spin_unlock_irq(&ndlp->lock);
4736                                 retry = 0;
4737                                 goto out_retry;
4738                         }
4739                         break;
4740                 }
4741                 break;
4742
4743         case IOSTAT_INTERMED_RSP:
4744         case IOSTAT_BA_RJT:
4745                 break;
4746
4747         default:
4748                 break;
4749         }
4750
4751         if (link_reset) {
4752                 rc = lpfc_link_reset(vport);
4753                 if (rc) {
4754                         /* Do not give up. Retry PLOGI one more time and attempt
4755                          * link reset if PLOGI fails again.
4756                          */
4757                         retry = 1;
4758                         delay = 100;
4759                         goto out_retry;
4760                 }
4761                 return 1;
4762         }
4763
4764         if (did == FDMI_DID)
4765                 retry = 1;
4766
4767         if ((cmd == ELS_CMD_FLOGI) &&
4768             (phba->fc_topology != LPFC_TOPOLOGY_LOOP) &&
4769             !lpfc_error_lost_link(irsp)) {
4770                 /* FLOGI retry policy */
4771                 retry = 1;
4772                 /* retry FLOGI forever */
4773                 if (phba->link_flag != LS_LOOPBACK_MODE)
4774                         maxretry = 0;
4775                 else
4776                         maxretry = 2;
4777
4778                 if (cmdiocb->retry >= 100)
4779                         delay = 5000;
4780                 else if (cmdiocb->retry >= 32)
4781                         delay = 1000;
4782         } else if ((cmd == ELS_CMD_FDISC) && !lpfc_error_lost_link(irsp)) {
4783                 /* retry FDISCs every second up to devloss */
4784                 retry = 1;
4785                 maxretry = vport->cfg_devloss_tmo;
4786                 delay = 1000;
4787         }
4788
4789         cmdiocb->retry++;
4790         if (maxretry && (cmdiocb->retry >= maxretry)) {
4791                 phba->fc_stat.elsRetryExceeded++;
4792                 retry = 0;
4793         }
4794
4795         if ((vport->load_flag & FC_UNLOADING) != 0)
4796                 retry = 0;
4797
4798 out_retry:
4799         if (retry) {
4800                 if ((cmd == ELS_CMD_PLOGI) || (cmd == ELS_CMD_FDISC)) {
4801                         /* Stop retrying PLOGI and FDISC if in FCF discovery */
4802                         if (phba->fcf.fcf_flag & FCF_DISCOVERY) {
4803                                 lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
4804                                                  "2849 Stop retry ELS command "
4805                                                  "x%x to remote NPORT x%x, "
4806                                                  "Data: x%x x%x\n", cmd, did,
4807                                                  cmdiocb->retry, delay);
4808                                 return 0;
4809                         }
4810                 }
4811
4812                 /* Retry ELS command <elsCmd> to remote NPORT <did> */
4813                 lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
4814                                  "0107 Retry ELS command x%x to remote "
4815                                  "NPORT x%x Data: x%x x%x\n",
4816                                  cmd, did, cmdiocb->retry, delay);
4817
4818                 if (((cmd == ELS_CMD_PLOGI) || (cmd == ELS_CMD_ADISC)) &&
4819                         ((irsp->ulpStatus != IOSTAT_LOCAL_REJECT) ||
4820                         ((irsp->un.ulpWord[4] & IOERR_PARAM_MASK) !=
4821                         IOERR_NO_RESOURCES))) {
4822                         /* Don't reset timer for no resources */
4823
4824                         /* If discovery / RSCN timer is running, reset it */
4825                         if (timer_pending(&vport->fc_disctmo) ||
4826                             (vport->fc_flag & FC_RSCN_MODE))
4827                                 lpfc_set_disctmo(vport);
4828                 }
4829
4830                 phba->fc_stat.elsXmitRetry++;
4831                 if (ndlp && delay) {
4832                         phba->fc_stat.elsDelayRetry++;
4833                         ndlp->nlp_retry = cmdiocb->retry;
4834
4835                         /* delay is specified in milliseconds */
4836                         mod_timer(&ndlp->nlp_delayfunc,
4837                                 jiffies + msecs_to_jiffies(delay));
4838                         spin_lock_irq(&ndlp->lock);
4839                         ndlp->nlp_flag |= NLP_DELAY_TMO;
4840                         spin_unlock_irq(&ndlp->lock);
4841
4842                         ndlp->nlp_prev_state = ndlp->nlp_state;
4843                         if ((cmd == ELS_CMD_PRLI) ||
4844                             (cmd == ELS_CMD_NVMEPRLI))
4845                                 lpfc_nlp_set_state(vport, ndlp,
4846                                         NLP_STE_PRLI_ISSUE);
4847                         else if (cmd != ELS_CMD_ADISC)
4848                                 lpfc_nlp_set_state(vport, ndlp,
4849                                         NLP_STE_NPR_NODE);
4850                         ndlp->nlp_last_elscmd = cmd;
4851
4852                         return 1;
4853                 }
4854                 switch (cmd) {
4855                 case ELS_CMD_FLOGI:
4856                         lpfc_issue_els_flogi(vport, ndlp, cmdiocb->retry);
4857                         return 1;
4858                 case ELS_CMD_FDISC:
4859                         lpfc_issue_els_fdisc(vport, ndlp, cmdiocb->retry);
4860                         return 1;
4861                 case ELS_CMD_PLOGI:
4862                         if (ndlp) {
4863                                 ndlp->nlp_prev_state = ndlp->nlp_state;
4864                                 lpfc_nlp_set_state(vport, ndlp,
4865                                                    NLP_STE_PLOGI_ISSUE);
4866                         }
4867                         lpfc_issue_els_plogi(vport, did, cmdiocb->retry);
4868                         return 1;
4869                 case ELS_CMD_ADISC:
4870                         ndlp->nlp_prev_state = ndlp->nlp_state;
4871                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_ADISC_ISSUE);
4872                         lpfc_issue_els_adisc(vport, ndlp, cmdiocb->retry);
4873                         return 1;
4874                 case ELS_CMD_PRLI:
4875                 case ELS_CMD_NVMEPRLI:
4876                         ndlp->nlp_prev_state = ndlp->nlp_state;
4877                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_PRLI_ISSUE);
4878                         lpfc_issue_els_prli(vport, ndlp, cmdiocb->retry);
4879                         return 1;
4880                 case ELS_CMD_LOGO:
4881                         ndlp->nlp_prev_state = ndlp->nlp_state;
4882                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_LOGO_ISSUE);
4883                         lpfc_issue_els_logo(vport, ndlp, cmdiocb->retry);
4884                         return 1;
4885                 }
4886         }
4887         /* No retry ELS command <elsCmd> to remote NPORT <did> */
4888         if (logerr) {
4889                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
4890                          "0137 No retry ELS command x%x to remote "
4891                          "NPORT x%x: Out of Resources: Error:x%x/%x\n",
4892                          cmd, did, irsp->ulpStatus,
4893                          irsp->un.ulpWord[4]);
4894         }
4895         else {
4896                 lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
4897                          "0108 No retry ELS command x%x to remote "
4898                          "NPORT x%x Retried:%d Error:x%x/%x\n",
4899                          cmd, did, cmdiocb->retry, irsp->ulpStatus,
4900                          irsp->un.ulpWord[4]);
4901         }
4902         return 0;
4903 }
4904
4905 /**
4906  * lpfc_els_free_data - Free lpfc dma buffer and data structure with an iocb
4907  * @phba: pointer to lpfc hba data structure.
4908  * @buf_ptr1: pointer to the lpfc DMA buffer data structure.
4909  *
4910  * This routine releases the lpfc DMA (Direct Memory Access) buffer(s)
4911  * associated with a command IOCB back to the lpfc DMA buffer pool. It first
4912  * checks to see whether there is a lpfc DMA buffer associated with the
4913  * response of the command IOCB. If so, it will be released before releasing
4914  * the lpfc DMA buffer associated with the IOCB itself.
4915  *
4916  * Return code
4917  *   0 - Successfully released lpfc DMA buffer (currently, always return 0)
4918  **/
4919 static int
4920 lpfc_els_free_data(struct lpfc_hba *phba, struct lpfc_dmabuf *buf_ptr1)
4921 {
4922         struct lpfc_dmabuf *buf_ptr;
4923
4924         /* Free the response before processing the command. */
4925         if (!list_empty(&buf_ptr1->list)) {
4926                 list_remove_head(&buf_ptr1->list, buf_ptr,
4927                                  struct lpfc_dmabuf,
4928                                  list);
4929                 lpfc_mbuf_free(phba, buf_ptr->virt, buf_ptr->phys);
4930                 kfree(buf_ptr);
4931         }
4932         lpfc_mbuf_free(phba, buf_ptr1->virt, buf_ptr1->phys);
4933         kfree(buf_ptr1);
4934         return 0;
4935 }
4936
4937 /**
4938  * lpfc_els_free_bpl - Free lpfc dma buffer and data structure with bpl
4939  * @phba: pointer to lpfc hba data structure.
4940  * @buf_ptr: pointer to the lpfc dma buffer data structure.
4941  *
4942  * This routine releases the lpfc Direct Memory Access (DMA) buffer
4943  * associated with a Buffer Pointer List (BPL) back to the lpfc DMA buffer
4944  * pool.
4945  *
4946  * Return code
4947  *   0 - Successfully released lpfc DMA buffer (currently, always return 0)
4948  **/
4949 static int
4950 lpfc_els_free_bpl(struct lpfc_hba *phba, struct lpfc_dmabuf *buf_ptr)
4951 {
4952         lpfc_mbuf_free(phba, buf_ptr->virt, buf_ptr->phys);
4953         kfree(buf_ptr);
4954         return 0;
4955 }
4956
4957 /**
4958  * lpfc_els_free_iocb - Free a command iocb and its associated resources
4959  * @phba: pointer to lpfc hba data structure.
4960  * @elsiocb: pointer to lpfc els command iocb data structure.
4961  *
4962  * This routine frees a command IOCB and its associated resources. The
4963  * command IOCB data structure contains the reference to various associated
4964  * resources, these fields must be set to NULL if the associated reference
4965  * not present:
4966  *   context1 - reference to ndlp
4967  *   context2 - reference to cmd
4968  *   context2->next - reference to rsp
4969  *   context3 - reference to bpl
4970  *
4971  * It first properly decrements the reference count held on ndlp for the
4972  * IOCB completion callback function. If LPFC_DELAY_MEM_FREE flag is not
4973  * set, it invokes the lpfc_els_free_data() routine to release the Direct
4974  * Memory Access (DMA) buffers associated with the IOCB. Otherwise, it
4975  * adds the DMA buffer the @phba data structure for the delayed release.
4976  * If reference to the Buffer Pointer List (BPL) is present, the
4977  * lpfc_els_free_bpl() routine is invoked to release the DMA memory
4978  * associated with BPL. Finally, the lpfc_sli_release_iocbq() routine is
4979  * invoked to release the IOCB data structure back to @phba IOCBQ list.
4980  *
4981  * Return code
4982  *   0 - Success (currently, always return 0)
4983  **/
4984 int
4985 lpfc_els_free_iocb(struct lpfc_hba *phba, struct lpfc_iocbq *elsiocb)
4986 {
4987         struct lpfc_dmabuf *buf_ptr, *buf_ptr1;
4988
4989         /* The I/O iocb is complete.  Clear the context1 data. */
4990         elsiocb->context1 = NULL;
4991
4992         /* context2  = cmd,  context2->next = rsp, context3 = bpl */
4993         if (elsiocb->context2) {
4994                 if (elsiocb->iocb_flag & LPFC_DELAY_MEM_FREE) {
4995                         /* Firmware could still be in progress of DMAing
4996                          * payload, so don't free data buffer till after
4997                          * a hbeat.
4998                          */
4999                         elsiocb->iocb_flag &= ~LPFC_DELAY_MEM_FREE;
5000                         buf_ptr = elsiocb->context2;
5001                         elsiocb->context2 = NULL;
5002                         if (buf_ptr) {
5003                                 buf_ptr1 = NULL;
5004                                 spin_lock_irq(&phba->hbalock);
5005                                 if (!list_empty(&buf_ptr->list)) {
5006                                         list_remove_head(&buf_ptr->list,
5007                                                 buf_ptr1, struct lpfc_dmabuf,
5008                                                 list);
5009                                         INIT_LIST_HEAD(&buf_ptr1->list);
5010                                         list_add_tail(&buf_ptr1->list,
5011                                                 &phba->elsbuf);
5012                                         phba->elsbuf_cnt++;
5013                                 }
5014                                 INIT_LIST_HEAD(&buf_ptr->list);
5015                                 list_add_tail(&buf_ptr->list, &phba->elsbuf);
5016                                 phba->elsbuf_cnt++;
5017                                 spin_unlock_irq(&phba->hbalock);
5018                         }
5019                 } else {
5020                         buf_ptr1 = (struct lpfc_dmabuf *) elsiocb->context2;
5021                         lpfc_els_free_data(phba, buf_ptr1);
5022                         elsiocb->context2 = NULL;
5023                 }
5024         }
5025
5026         if (elsiocb->context3) {
5027                 buf_ptr = (struct lpfc_dmabuf *) elsiocb->context3;
5028                 lpfc_els_free_bpl(phba, buf_ptr);
5029                 elsiocb->context3 = NULL;
5030         }
5031         lpfc_sli_release_iocbq(phba, elsiocb);
5032         return 0;
5033 }
5034
5035 /**
5036  * lpfc_cmpl_els_logo_acc - Completion callback function to logo acc response
5037  * @phba: pointer to lpfc hba data structure.
5038  * @cmdiocb: pointer to lpfc command iocb data structure.
5039  * @rspiocb: pointer to lpfc response iocb data structure.
5040  *
5041  * This routine is the completion callback function to the Logout (LOGO)
5042  * Accept (ACC) Response ELS command. This routine is invoked to indicate
5043  * the completion of the LOGO process. It invokes the lpfc_nlp_not_used() to
5044  * release the ndlp if it has the last reference remaining (reference count
5045  * is 1). If succeeded (meaning ndlp released), it sets the IOCB context1
5046  * field to NULL to inform the following lpfc_els_free_iocb() routine no
5047  * ndlp reference count needs to be decremented. Otherwise, the ndlp
5048  * reference use-count shall be decremented by the lpfc_els_free_iocb()
5049  * routine. Finally, the lpfc_els_free_iocb() is invoked to release the
5050  * IOCB data structure.
5051  **/
5052 static void
5053 lpfc_cmpl_els_logo_acc(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
5054                        struct lpfc_iocbq *rspiocb)
5055 {
5056         struct lpfc_nodelist *ndlp = (struct lpfc_nodelist *) cmdiocb->context1;
5057         struct lpfc_vport *vport = cmdiocb->vport;
5058         IOCB_t *irsp;
5059
5060         irsp = &rspiocb->iocb;
5061         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
5062                 "ACC LOGO cmpl:   status:x%x/x%x did:x%x",
5063                 irsp->ulpStatus, irsp->un.ulpWord[4], ndlp->nlp_DID);
5064         /* ACC to LOGO completes to NPort <nlp_DID> */
5065         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
5066                          "0109 ACC to LOGO completes to NPort x%x refcnt %d "
5067                          "Data: x%x x%x x%x\n",
5068                          ndlp->nlp_DID, kref_read(&ndlp->kref), ndlp->nlp_flag,
5069                          ndlp->nlp_state, ndlp->nlp_rpi);
5070
5071         /* This clause allows the LOGO ACC to complete and free resources
5072          * for the Fabric Domain Controller.  It does deliberately skip
5073          * the unreg_rpi and release rpi because some fabrics send RDP
5074          * requests after logging out from the initiator.
5075          */
5076         if (ndlp->nlp_type & NLP_FABRIC &&
5077             ((ndlp->nlp_DID & WELL_KNOWN_DID_MASK) != WELL_KNOWN_DID_MASK))
5078                 goto out;
5079
5080         if (ndlp->nlp_state == NLP_STE_NPR_NODE) {
5081
5082                 /* If PLOGI is being retried, PLOGI completion will cleanup the
5083                  * node. The NLP_NPR_2B_DISC flag needs to be retained to make
5084                  * progress on nodes discovered from last RSCN.
5085                  */
5086                 if ((ndlp->nlp_flag & NLP_DELAY_TMO) &&
5087                     (ndlp->nlp_last_elscmd == ELS_CMD_PLOGI))
5088                         goto out;
5089
5090                 /* NPort Recovery mode or node is just allocated */
5091                 if (!lpfc_nlp_not_used(ndlp)) {
5092                         /* A LOGO is completing and the node is in NPR state.
5093                          * Just unregister the RPI because the node is still
5094                          * required.
5095                          */
5096                         lpfc_unreg_rpi(vport, ndlp);
5097                 } else {
5098                         /* Indicate the node has already released, should
5099                          * not reference to it from within lpfc_els_free_iocb.
5100                          */
5101                         cmdiocb->context1 = NULL;
5102                 }
5103         }
5104  out:
5105         /*
5106          * The driver received a LOGO from the rport and has ACK'd it.
5107          * At this point, the driver is done so release the IOCB
5108          */
5109         lpfc_els_free_iocb(phba, cmdiocb);
5110         lpfc_nlp_put(ndlp);
5111 }
5112
5113 /**
5114  * lpfc_mbx_cmpl_dflt_rpi - Completion callbk func for unreg dflt rpi mbox cmd
5115  * @phba: pointer to lpfc hba data structure.
5116  * @pmb: pointer to the driver internal queue element for mailbox command.
5117  *
5118  * This routine is the completion callback function for unregister default
5119  * RPI (Remote Port Index) mailbox command to the @phba. It simply releases
5120  * the associated lpfc Direct Memory Access (DMA) buffer back to the pool and
5121  * decrements the ndlp reference count held for this completion callback
5122  * function. After that, it invokes the lpfc_nlp_not_used() to check
5123  * whether there is only one reference left on the ndlp. If so, it will
5124  * perform one more decrement and trigger the release of the ndlp.
5125  **/
5126 void
5127 lpfc_mbx_cmpl_dflt_rpi(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
5128 {
5129         struct lpfc_dmabuf *mp = (struct lpfc_dmabuf *)(pmb->ctx_buf);
5130         struct lpfc_nodelist *ndlp = (struct lpfc_nodelist *)pmb->ctx_ndlp;
5131         u32 mbx_flag = pmb->mbox_flag;
5132         u32 mbx_cmd = pmb->u.mb.mbxCommand;
5133
5134         pmb->ctx_buf = NULL;
5135         pmb->ctx_ndlp = NULL;
5136
5137         if (ndlp) {
5138                 lpfc_printf_vlog(ndlp->vport, KERN_INFO, LOG_NODE,
5139                                  "0006 rpi x%x DID:%x flg:%x %d x%px "
5140                                  "mbx_cmd x%x mbx_flag x%x x%px\n",
5141                                  ndlp->nlp_rpi, ndlp->nlp_DID, ndlp->nlp_flag,
5142                                  kref_read(&ndlp->kref), ndlp, mbx_cmd,
5143                                  mbx_flag, pmb);
5144
5145                 /* This ends the default/temporary RPI cleanup logic for this
5146                  * ndlp and the node and rpi needs to be released. Free the rpi
5147                  * first on an UNREG_LOGIN and then release the final
5148                  * references.
5149                  */
5150                 spin_lock_irq(&ndlp->lock);
5151                 ndlp->nlp_flag &= ~NLP_REG_LOGIN_SEND;
5152                 if (mbx_cmd == MBX_UNREG_LOGIN)
5153                         ndlp->nlp_flag &= ~NLP_UNREG_INP;
5154                 spin_unlock_irq(&ndlp->lock);
5155                 lpfc_nlp_put(ndlp);
5156                 lpfc_drop_node(ndlp->vport, ndlp);
5157         }
5158
5159         lpfc_mbuf_free(phba, mp->virt, mp->phys);
5160         kfree(mp);
5161         mempool_free(pmb, phba->mbox_mem_pool);
5162         return;
5163 }
5164
5165 /**
5166  * lpfc_cmpl_els_rsp - Completion callback function for els response iocb cmd
5167  * @phba: pointer to lpfc hba data structure.
5168  * @cmdiocb: pointer to lpfc command iocb data structure.
5169  * @rspiocb: pointer to lpfc response iocb data structure.
5170  *
5171  * This routine is the completion callback function for ELS Response IOCB
5172  * command. In normal case, this callback function just properly sets the
5173  * nlp_flag bitmap in the ndlp data structure, if the mbox command reference
5174  * field in the command IOCB is not NULL, the referred mailbox command will
5175  * be send out, and then invokes the lpfc_els_free_iocb() routine to release
5176  * the IOCB.
5177  **/
5178 static void
5179 lpfc_cmpl_els_rsp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
5180                   struct lpfc_iocbq *rspiocb)
5181 {
5182         struct lpfc_nodelist *ndlp = (struct lpfc_nodelist *) cmdiocb->context1;
5183         struct lpfc_vport *vport = ndlp ? ndlp->vport : NULL;
5184         struct Scsi_Host  *shost = vport ? lpfc_shost_from_vport(vport) : NULL;
5185         IOCB_t  *irsp;
5186         LPFC_MBOXQ_t *mbox = NULL;
5187         struct lpfc_dmabuf *mp = NULL;
5188
5189         irsp = &rspiocb->iocb;
5190
5191         if (!vport) {
5192                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
5193                                 "3177 ELS response failed\n");
5194                 goto out;
5195         }
5196         if (cmdiocb->context_un.mbox)
5197                 mbox = cmdiocb->context_un.mbox;
5198
5199         /* Check to see if link went down during discovery */
5200         if (!ndlp || lpfc_els_chk_latt(vport)) {
5201                 if (mbox) {
5202                         mp = (struct lpfc_dmabuf *)mbox->ctx_buf;
5203                         if (mp) {
5204                                 lpfc_mbuf_free(phba, mp->virt, mp->phys);
5205                                 kfree(mp);
5206                         }
5207                         mempool_free(mbox, phba->mbox_mem_pool);
5208                 }
5209                 goto out;
5210         }
5211
5212         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
5213                 "ELS rsp cmpl:    status:x%x/x%x did:x%x",
5214                 irsp->ulpStatus, irsp->un.ulpWord[4],
5215                 cmdiocb->iocb.un.elsreq64.remoteID);
5216         /* ELS response tag <ulpIoTag> completes */
5217         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
5218                          "0110 ELS response tag x%x completes "
5219                          "Data: x%x x%x x%x x%x x%x x%x x%x x%x x%px\n",
5220                          cmdiocb->iocb.ulpIoTag, rspiocb->iocb.ulpStatus,
5221                          rspiocb->iocb.un.ulpWord[4], rspiocb->iocb.ulpTimeout,
5222                          ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
5223                          ndlp->nlp_rpi, kref_read(&ndlp->kref), mbox);
5224         if (mbox) {
5225                 if ((rspiocb->iocb.ulpStatus == 0) &&
5226                     (ndlp->nlp_flag & NLP_ACC_REGLOGIN)) {
5227                         if (!lpfc_unreg_rpi(vport, ndlp) &&
5228                             (!(vport->fc_flag & FC_PT2PT))) {
5229                                 if (ndlp->nlp_state == NLP_STE_REG_LOGIN_ISSUE) {
5230                                         lpfc_printf_vlog(vport, KERN_INFO,
5231                                                          LOG_DISCOVERY,
5232                                                          "0314 PLOGI recov "
5233                                                          "DID x%x "
5234                                                          "Data: x%x x%x x%x\n",
5235                                                          ndlp->nlp_DID,
5236                                                          ndlp->nlp_state,
5237                                                          ndlp->nlp_rpi,
5238                                                          ndlp->nlp_flag);
5239                                         mp = mbox->ctx_buf;
5240                                         if (mp) {
5241                                                 lpfc_mbuf_free(phba, mp->virt,
5242                                                                mp->phys);
5243                                                 kfree(mp);
5244                                         }
5245                                         mempool_free(mbox, phba->mbox_mem_pool);
5246                                         goto out;
5247                                 }
5248                         }
5249
5250                         /* Increment reference count to ndlp to hold the
5251                          * reference to ndlp for the callback function.
5252                          */
5253                         mbox->ctx_ndlp = lpfc_nlp_get(ndlp);
5254                         if (!mbox->ctx_ndlp)
5255                                 goto out;
5256
5257                         mbox->vport = vport;
5258                         if (ndlp->nlp_flag & NLP_RM_DFLT_RPI) {
5259                                 mbox->mbox_flag |= LPFC_MBX_IMED_UNREG;
5260                                 mbox->mbox_cmpl = lpfc_mbx_cmpl_dflt_rpi;
5261                         }
5262                         else {
5263                                 mbox->mbox_cmpl = lpfc_mbx_cmpl_reg_login;
5264                                 ndlp->nlp_prev_state = ndlp->nlp_state;
5265                                 lpfc_nlp_set_state(vport, ndlp,
5266                                            NLP_STE_REG_LOGIN_ISSUE);
5267                         }
5268
5269                         ndlp->nlp_flag |= NLP_REG_LOGIN_SEND;
5270                         if (lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT)
5271                             != MBX_NOT_FINISHED)
5272                                 goto out;
5273
5274                         /* Decrement the ndlp reference count we
5275                          * set for this failed mailbox command.
5276                          */
5277                         lpfc_nlp_put(ndlp);
5278                         ndlp->nlp_flag &= ~NLP_REG_LOGIN_SEND;
5279
5280                         /* ELS rsp: Cannot issue reg_login for <NPortid> */
5281                         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
5282                                 "0138 ELS rsp: Cannot issue reg_login for x%x "
5283                                 "Data: x%x x%x x%x\n",
5284                                 ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
5285                                 ndlp->nlp_rpi);
5286                 }
5287                 mp = (struct lpfc_dmabuf *)mbox->ctx_buf;
5288                 if (mp) {
5289                         lpfc_mbuf_free(phba, mp->virt, mp->phys);
5290                         kfree(mp);
5291                 }
5292                 mempool_free(mbox, phba->mbox_mem_pool);
5293         }
5294 out:
5295         if (ndlp && shost) {
5296                 spin_lock_irq(&ndlp->lock);
5297                 if (mbox)
5298                         ndlp->nlp_flag &= ~NLP_ACC_REGLOGIN;
5299                 ndlp->nlp_flag &= ~NLP_RM_DFLT_RPI;
5300                 spin_unlock_irq(&ndlp->lock);
5301         }
5302
5303         /* An SLI4 NPIV instance wants to drop the node at this point under
5304          * these conditions and release the RPI.
5305          */
5306         if (phba->sli_rev == LPFC_SLI_REV4 &&
5307             (vport && vport->port_type == LPFC_NPIV_PORT) &&
5308             !(ndlp->fc4_xpt_flags & SCSI_XPT_REGD) &&
5309             ndlp->nlp_flag & NLP_RELEASE_RPI) {
5310                 lpfc_sli4_free_rpi(phba, ndlp->nlp_rpi);
5311                 spin_lock_irq(&ndlp->lock);
5312                 ndlp->nlp_rpi = LPFC_RPI_ALLOC_ERROR;
5313                 ndlp->nlp_flag &= ~NLP_RELEASE_RPI;
5314                 spin_unlock_irq(&ndlp->lock);
5315                 lpfc_drop_node(vport, ndlp);
5316         }
5317
5318         /* Release the originating I/O reference. */
5319         lpfc_els_free_iocb(phba, cmdiocb);
5320         lpfc_nlp_put(ndlp);
5321         return;
5322 }
5323
5324 /**
5325  * lpfc_els_rsp_acc - Prepare and issue an acc response iocb command
5326  * @vport: pointer to a host virtual N_Port data structure.
5327  * @flag: the els command code to be accepted.
5328  * @oldiocb: pointer to the original lpfc command iocb data structure.
5329  * @ndlp: pointer to a node-list data structure.
5330  * @mbox: pointer to the driver internal queue element for mailbox command.
5331  *
5332  * This routine prepares and issues an Accept (ACC) response IOCB
5333  * command. It uses the @flag to properly set up the IOCB field for the
5334  * specific ACC response command to be issued and invokes the
5335  * lpfc_sli_issue_iocb() routine to send out ACC response IOCB. If a
5336  * @mbox pointer is passed in, it will be put into the context_un.mbox
5337  * field of the IOCB for the completion callback function to issue the
5338  * mailbox command to the HBA later when callback is invoked.
5339  *
5340  * Note that the ndlp reference count will be incremented by 1 for holding the
5341  * ndlp and the reference to ndlp will be stored into the context1 field of
5342  * the IOCB for the completion callback function to the corresponding
5343  * response ELS IOCB command.
5344  *
5345  * Return code
5346  *   0 - Successfully issued acc response
5347  *   1 - Failed to issue acc response
5348  **/
5349 int
5350 lpfc_els_rsp_acc(struct lpfc_vport *vport, uint32_t flag,
5351                  struct lpfc_iocbq *oldiocb, struct lpfc_nodelist *ndlp,
5352                  LPFC_MBOXQ_t *mbox)
5353 {
5354         struct lpfc_hba  *phba = vport->phba;
5355         IOCB_t *icmd;
5356         IOCB_t *oldcmd;
5357         struct lpfc_iocbq *elsiocb;
5358         uint8_t *pcmd;
5359         struct serv_parm *sp;
5360         uint16_t cmdsize;
5361         int rc;
5362         ELS_PKT *els_pkt_ptr;
5363         struct fc_els_rdf_resp *rdf_resp;
5364
5365         oldcmd = &oldiocb->iocb;
5366
5367         switch (flag) {
5368         case ELS_CMD_ACC:
5369                 cmdsize = sizeof(uint32_t);
5370                 elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, oldiocb->retry,
5371                                              ndlp, ndlp->nlp_DID, ELS_CMD_ACC);
5372                 if (!elsiocb) {
5373                         spin_lock_irq(&ndlp->lock);
5374                         ndlp->nlp_flag &= ~NLP_LOGO_ACC;
5375                         spin_unlock_irq(&ndlp->lock);
5376                         return 1;
5377                 }
5378
5379                 icmd = &elsiocb->iocb;
5380                 icmd->ulpContext = oldcmd->ulpContext;  /* Xri / rx_id */
5381                 icmd->unsli3.rcvsli3.ox_id = oldcmd->unsli3.rcvsli3.ox_id;
5382                 pcmd = (((struct lpfc_dmabuf *) elsiocb->context2)->virt);
5383                 *((uint32_t *) (pcmd)) = ELS_CMD_ACC;
5384                 pcmd += sizeof(uint32_t);
5385
5386                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
5387                         "Issue ACC:       did:x%x flg:x%x",
5388                         ndlp->nlp_DID, ndlp->nlp_flag, 0);
5389                 break;
5390         case ELS_CMD_FLOGI:
5391         case ELS_CMD_PLOGI:
5392                 cmdsize = (sizeof(struct serv_parm) + sizeof(uint32_t));
5393                 elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, oldiocb->retry,
5394                                              ndlp, ndlp->nlp_DID, ELS_CMD_ACC);
5395                 if (!elsiocb)
5396                         return 1;
5397
5398                 icmd = &elsiocb->iocb;
5399                 icmd->ulpContext = oldcmd->ulpContext;  /* Xri / rx_id */
5400                 icmd->unsli3.rcvsli3.ox_id = oldcmd->unsli3.rcvsli3.ox_id;
5401                 pcmd = (((struct lpfc_dmabuf *) elsiocb->context2)->virt);
5402
5403                 if (mbox)
5404                         elsiocb->context_un.mbox = mbox;
5405
5406                 *((uint32_t *) (pcmd)) = ELS_CMD_ACC;
5407                 pcmd += sizeof(uint32_t);
5408                 sp = (struct serv_parm *)pcmd;
5409
5410                 if (flag == ELS_CMD_FLOGI) {
5411                         /* Copy the received service parameters back */
5412                         memcpy(sp, &phba->fc_fabparam,
5413                                sizeof(struct serv_parm));
5414
5415                         /* Clear the F_Port bit */
5416                         sp->cmn.fPort = 0;
5417
5418                         /* Mark all class service parameters as invalid */
5419                         sp->cls1.classValid = 0;
5420                         sp->cls2.classValid = 0;
5421                         sp->cls3.classValid = 0;
5422                         sp->cls4.classValid = 0;
5423
5424                         /* Copy our worldwide names */
5425                         memcpy(&sp->portName, &vport->fc_sparam.portName,
5426                                sizeof(struct lpfc_name));
5427                         memcpy(&sp->nodeName, &vport->fc_sparam.nodeName,
5428                                sizeof(struct lpfc_name));
5429                 } else {
5430                         memcpy(pcmd, &vport->fc_sparam,
5431                                sizeof(struct serv_parm));
5432
5433                         sp->cmn.valid_vendor_ver_level = 0;
5434                         memset(sp->un.vendorVersion, 0,
5435                                sizeof(sp->un.vendorVersion));
5436                         sp->cmn.bbRcvSizeMsb &= 0xF;
5437
5438                         /* If our firmware supports this feature, convey that
5439                          * info to the target using the vendor specific field.
5440                          */
5441                         if (phba->sli.sli_flag & LPFC_SLI_SUPPRESS_RSP) {
5442                                 sp->cmn.valid_vendor_ver_level = 1;
5443                                 sp->un.vv.vid = cpu_to_be32(LPFC_VV_EMLX_ID);
5444                                 sp->un.vv.flags =
5445                                         cpu_to_be32(LPFC_VV_SUPPRESS_RSP);
5446                         }
5447                 }
5448
5449                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
5450                         "Issue ACC FLOGI/PLOGI: did:x%x flg:x%x",
5451                         ndlp->nlp_DID, ndlp->nlp_flag, 0);
5452                 break;
5453         case ELS_CMD_PRLO:
5454                 cmdsize = sizeof(uint32_t) + sizeof(PRLO);
5455                 elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, oldiocb->retry,
5456                                              ndlp, ndlp->nlp_DID, ELS_CMD_PRLO);
5457                 if (!elsiocb)
5458                         return 1;
5459
5460                 icmd = &elsiocb->iocb;
5461                 icmd->ulpContext = oldcmd->ulpContext;  /* Xri / rx_id */
5462                 icmd->unsli3.rcvsli3.ox_id = oldcmd->unsli3.rcvsli3.ox_id;
5463                 pcmd = (((struct lpfc_dmabuf *) elsiocb->context2)->virt);
5464
5465                 memcpy(pcmd, ((struct lpfc_dmabuf *) oldiocb->context2)->virt,
5466                        sizeof(uint32_t) + sizeof(PRLO));
5467                 *((uint32_t *) (pcmd)) = ELS_CMD_PRLO_ACC;
5468                 els_pkt_ptr = (ELS_PKT *) pcmd;
5469                 els_pkt_ptr->un.prlo.acceptRspCode = PRLO_REQ_EXECUTED;
5470
5471                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
5472                         "Issue ACC PRLO:  did:x%x flg:x%x",
5473                         ndlp->nlp_DID, ndlp->nlp_flag, 0);
5474                 break;
5475         case ELS_CMD_RDF:
5476                 cmdsize = sizeof(*rdf_resp);
5477                 elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, oldiocb->retry,
5478                                              ndlp, ndlp->nlp_DID, ELS_CMD_ACC);
5479                 if (!elsiocb)
5480                         return 1;
5481
5482                 icmd = &elsiocb->iocb;
5483                 icmd->ulpContext = oldcmd->ulpContext;  /* Xri / rx_id */
5484                 icmd->unsli3.rcvsli3.ox_id = oldcmd->unsli3.rcvsli3.ox_id;
5485                 pcmd = (((struct lpfc_dmabuf *)elsiocb->context2)->virt);
5486                 rdf_resp = (struct fc_els_rdf_resp *)pcmd;
5487                 memset(rdf_resp, 0, sizeof(*rdf_resp));
5488                 rdf_resp->acc_hdr.la_cmd = ELS_LS_ACC;
5489
5490                 /* FC-LS-5 specifies desc_list_len shall be set to 12 */
5491                 rdf_resp->desc_list_len = cpu_to_be32(12);
5492
5493                 /* FC-LS-5 specifies LS REQ Information descriptor */
5494                 rdf_resp->lsri.desc_tag = cpu_to_be32(1);
5495                 rdf_resp->lsri.desc_len = cpu_to_be32(sizeof(u32));
5496                 rdf_resp->lsri.rqst_w0.cmd = ELS_RDF;
5497                 break;
5498         default:
5499                 return 1;
5500         }
5501         if (ndlp->nlp_flag & NLP_LOGO_ACC) {
5502                 spin_lock_irq(&ndlp->lock);
5503                 if (!(ndlp->nlp_flag & NLP_RPI_REGISTERED ||
5504                         ndlp->nlp_flag & NLP_REG_LOGIN_SEND))
5505                         ndlp->nlp_flag &= ~NLP_LOGO_ACC;
5506                 spin_unlock_irq(&ndlp->lock);
5507                 elsiocb->iocb_cmpl = lpfc_cmpl_els_logo_acc;
5508         } else {
5509                 elsiocb->iocb_cmpl = lpfc_cmpl_els_rsp;
5510         }
5511
5512         phba->fc_stat.elsXmitACC++;
5513         elsiocb->context1 = lpfc_nlp_get(ndlp);
5514         if (!elsiocb->context1) {
5515                 lpfc_els_free_iocb(phba, elsiocb);
5516                 return 1;
5517         }
5518
5519         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
5520         if (rc == IOCB_ERROR) {
5521                 lpfc_els_free_iocb(phba, elsiocb);
5522                 lpfc_nlp_put(ndlp);
5523                 return 1;
5524         }
5525
5526         /* Xmit ELS ACC response tag <ulpIoTag> */
5527         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
5528                          "0128 Xmit ELS ACC response Status: x%x, IoTag: x%x, "
5529                          "XRI: x%x, DID: x%x, nlp_flag: x%x nlp_state: x%x "
5530                          "RPI: x%x, fc_flag x%x refcnt %d\n",
5531                          rc, elsiocb->iotag, elsiocb->sli4_xritag,
5532                          ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
5533                          ndlp->nlp_rpi, vport->fc_flag, kref_read(&ndlp->kref));
5534         return 0;
5535 }
5536
5537 /**
5538  * lpfc_els_rsp_reject - Prepare and issue a rjt response iocb command
5539  * @vport: pointer to a virtual N_Port data structure.
5540  * @rejectError: reject response to issue
5541  * @oldiocb: pointer to the original lpfc command iocb data structure.
5542  * @ndlp: pointer to a node-list data structure.
5543  * @mbox: pointer to the driver internal queue element for mailbox command.
5544  *
5545  * This routine prepares and issue an Reject (RJT) response IOCB
5546  * command. If a @mbox pointer is passed in, it will be put into the
5547  * context_un.mbox field of the IOCB for the completion callback function
5548  * to issue to the HBA later.
5549  *
5550  * Note that the ndlp reference count will be incremented by 1 for holding the
5551  * ndlp and the reference to ndlp will be stored into the context1 field of
5552  * the IOCB for the completion callback function to the reject response
5553  * ELS IOCB command.
5554  *
5555  * Return code
5556  *   0 - Successfully issued reject response
5557  *   1 - Failed to issue reject response
5558  **/
5559 int
5560 lpfc_els_rsp_reject(struct lpfc_vport *vport, uint32_t rejectError,
5561                     struct lpfc_iocbq *oldiocb, struct lpfc_nodelist *ndlp,
5562                     LPFC_MBOXQ_t *mbox)
5563 {
5564         int rc;
5565         struct lpfc_hba  *phba = vport->phba;
5566         IOCB_t *icmd;
5567         IOCB_t *oldcmd;
5568         struct lpfc_iocbq *elsiocb;
5569         uint8_t *pcmd;
5570         uint16_t cmdsize;
5571
5572         cmdsize = 2 * sizeof(uint32_t);
5573         elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, oldiocb->retry, ndlp,
5574                                      ndlp->nlp_DID, ELS_CMD_LS_RJT);
5575         if (!elsiocb)
5576                 return 1;
5577
5578         icmd = &elsiocb->iocb;
5579         oldcmd = &oldiocb->iocb;
5580         icmd->ulpContext = oldcmd->ulpContext;  /* Xri / rx_id */
5581         icmd->unsli3.rcvsli3.ox_id = oldcmd->unsli3.rcvsli3.ox_id;
5582         pcmd = (uint8_t *) (((struct lpfc_dmabuf *) elsiocb->context2)->virt);
5583
5584         *((uint32_t *) (pcmd)) = ELS_CMD_LS_RJT;
5585         pcmd += sizeof(uint32_t);
5586         *((uint32_t *) (pcmd)) = rejectError;
5587
5588         if (mbox)
5589                 elsiocb->context_un.mbox = mbox;
5590
5591         /* Xmit ELS RJT <err> response tag <ulpIoTag> */
5592         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
5593                          "0129 Xmit ELS RJT x%x response tag x%x "
5594                          "xri x%x, did x%x, nlp_flag x%x, nlp_state x%x, "
5595                          "rpi x%x\n",
5596                          rejectError, elsiocb->iotag,
5597                          elsiocb->iocb.ulpContext, ndlp->nlp_DID,
5598                          ndlp->nlp_flag, ndlp->nlp_state, ndlp->nlp_rpi);
5599         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
5600                 "Issue LS_RJT:    did:x%x flg:x%x err:x%x",
5601                 ndlp->nlp_DID, ndlp->nlp_flag, rejectError);
5602
5603         phba->fc_stat.elsXmitLSRJT++;
5604         elsiocb->iocb_cmpl = lpfc_cmpl_els_rsp;
5605         elsiocb->context1 = lpfc_nlp_get(ndlp);
5606         if (!elsiocb->context1) {
5607                 lpfc_els_free_iocb(phba, elsiocb);
5608                 return 1;
5609         }
5610
5611         /* The NPIV instance is rejecting this unsolicited ELS. Make sure the
5612          * node's assigned RPI gets released provided this node is not already
5613          * registered with the transport.
5614          */
5615         if (phba->sli_rev == LPFC_SLI_REV4 &&
5616             vport->port_type == LPFC_NPIV_PORT &&
5617             !(ndlp->fc4_xpt_flags & SCSI_XPT_REGD)) {
5618                 spin_lock_irq(&ndlp->lock);
5619                 ndlp->nlp_flag |= NLP_RELEASE_RPI;
5620                 spin_unlock_irq(&ndlp->lock);
5621         }
5622
5623         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
5624         if (rc == IOCB_ERROR) {
5625                 lpfc_els_free_iocb(phba, elsiocb);
5626                 lpfc_nlp_put(ndlp);
5627                 return 1;
5628         }
5629
5630         return 0;
5631 }
5632
5633  /**
5634   * lpfc_issue_els_edc_rsp - Exchange Diagnostic Capabilities with the fabric.
5635   * @vport: pointer to a host virtual N_Port data structure.
5636   * @cmdiocb: pointer to the original lpfc command iocb data structure.
5637   * @ndlp: NPort to where rsp is directed
5638   *
5639   * This routine issues an EDC ACC RSP to the F-Port Controller to communicate
5640   * this N_Port's support of hardware signals in its Congestion
5641   * Capabilities Descriptor.
5642   *
5643   * Return code
5644   *   0 - Successfully issued edc rsp command
5645   *   1 - Failed to issue edc rsp command
5646   **/
5647 static int
5648 lpfc_issue_els_edc_rsp(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
5649                        struct lpfc_nodelist *ndlp)
5650 {
5651         struct lpfc_hba  *phba = vport->phba;
5652         struct lpfc_els_edc_rsp *edc_rsp;
5653         struct lpfc_iocbq *elsiocb;
5654         IOCB_t *icmd, *cmd;
5655         uint8_t *pcmd;
5656         int cmdsize, rc;
5657
5658         cmdsize = sizeof(struct lpfc_els_edc_rsp);
5659         elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, cmdiocb->retry,
5660                                      ndlp, ndlp->nlp_DID, ELS_CMD_ACC);
5661         if (!elsiocb)
5662                 return 1;
5663
5664         icmd = &elsiocb->iocb;
5665         cmd = &cmdiocb->iocb;
5666         icmd->ulpContext = cmd->ulpContext;     /* Xri / rx_id */
5667         icmd->unsli3.rcvsli3.ox_id = cmd->unsli3.rcvsli3.ox_id;
5668         pcmd = (((struct lpfc_dmabuf *)elsiocb->context2)->virt);
5669         memset(pcmd, 0, cmdsize);
5670
5671         edc_rsp = (struct lpfc_els_edc_rsp *)pcmd;
5672         edc_rsp->edc_rsp.acc_hdr.la_cmd = ELS_LS_ACC;
5673         edc_rsp->edc_rsp.desc_list_len = cpu_to_be32(
5674                 FC_TLV_DESC_LENGTH_FROM_SZ(struct lpfc_els_edc_rsp));
5675         edc_rsp->edc_rsp.lsri.desc_tag = cpu_to_be32(ELS_DTAG_LS_REQ_INFO);
5676         edc_rsp->edc_rsp.lsri.desc_len = cpu_to_be32(
5677                 FC_TLV_DESC_LENGTH_FROM_SZ(struct fc_els_lsri_desc));
5678         edc_rsp->edc_rsp.lsri.rqst_w0.cmd = ELS_EDC;
5679         lpfc_format_edc_cgn_desc(phba, &edc_rsp->cgn_desc);
5680
5681         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
5682                               "Issue EDC ACC:      did:x%x flg:x%x refcnt %d",
5683                               ndlp->nlp_DID, ndlp->nlp_flag,
5684                               kref_read(&ndlp->kref));
5685         elsiocb->iocb_cmpl = lpfc_cmpl_els_rsp;
5686
5687         phba->fc_stat.elsXmitACC++;
5688         elsiocb->context1 = lpfc_nlp_get(ndlp);
5689         if (!elsiocb->context1) {
5690                 lpfc_els_free_iocb(phba, elsiocb);
5691                 return 1;
5692         }
5693
5694         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
5695         if (rc == IOCB_ERROR) {
5696                 lpfc_els_free_iocb(phba, elsiocb);
5697                 lpfc_nlp_put(ndlp);
5698                 return 1;
5699         }
5700
5701         /* Xmit ELS ACC response tag <ulpIoTag> */
5702         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
5703                          "0152 Xmit EDC ACC response Status: x%x, IoTag: x%x, "
5704                          "XRI: x%x, DID: x%x, nlp_flag: x%x nlp_state: x%x "
5705                          "RPI: x%x, fc_flag x%x\n",
5706                          rc, elsiocb->iotag, elsiocb->sli4_xritag,
5707                          ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
5708                          ndlp->nlp_rpi, vport->fc_flag);
5709
5710         return 0;
5711 }
5712
5713 /**
5714  * lpfc_els_rsp_adisc_acc - Prepare and issue acc response to adisc iocb cmd
5715  * @vport: pointer to a virtual N_Port data structure.
5716  * @oldiocb: pointer to the original lpfc command iocb data structure.
5717  * @ndlp: pointer to a node-list data structure.
5718  *
5719  * This routine prepares and issues an Accept (ACC) response to Address
5720  * Discover (ADISC) ELS command. It simply prepares the payload of the IOCB
5721  * and invokes the lpfc_sli_issue_iocb() routine to send out the command.
5722  *
5723  * Note that the ndlp reference count will be incremented by 1 for holding the
5724  * ndlp and the reference to ndlp will be stored into the context1 field of
5725  * the IOCB for the completion callback function to the ADISC Accept response
5726  * ELS IOCB command.
5727  *
5728  * Return code
5729  *   0 - Successfully issued acc adisc response
5730  *   1 - Failed to issue adisc acc response
5731  **/
5732 int
5733 lpfc_els_rsp_adisc_acc(struct lpfc_vport *vport, struct lpfc_iocbq *oldiocb,
5734                        struct lpfc_nodelist *ndlp)
5735 {
5736         struct lpfc_hba  *phba = vport->phba;
5737         ADISC *ap;
5738         IOCB_t *icmd, *oldcmd;
5739         struct lpfc_iocbq *elsiocb;
5740         uint8_t *pcmd;
5741         uint16_t cmdsize;
5742         int rc;
5743
5744         cmdsize = sizeof(uint32_t) + sizeof(ADISC);
5745         elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, oldiocb->retry, ndlp,
5746                                      ndlp->nlp_DID, ELS_CMD_ACC);
5747         if (!elsiocb)
5748                 return 1;
5749
5750         icmd = &elsiocb->iocb;
5751         oldcmd = &oldiocb->iocb;
5752         icmd->ulpContext = oldcmd->ulpContext;  /* Xri / rx_id */
5753         icmd->unsli3.rcvsli3.ox_id = oldcmd->unsli3.rcvsli3.ox_id;
5754
5755         /* Xmit ADISC ACC response tag <ulpIoTag> */
5756         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
5757                          "0130 Xmit ADISC ACC response iotag x%x xri: "
5758                          "x%x, did x%x, nlp_flag x%x, nlp_state x%x rpi x%x\n",
5759                          elsiocb->iotag, elsiocb->iocb.ulpContext,
5760                          ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
5761                          ndlp->nlp_rpi);
5762         pcmd = (uint8_t *) (((struct lpfc_dmabuf *) elsiocb->context2)->virt);
5763
5764         *((uint32_t *) (pcmd)) = ELS_CMD_ACC;
5765         pcmd += sizeof(uint32_t);
5766
5767         ap = (ADISC *) (pcmd);
5768         ap->hardAL_PA = phba->fc_pref_ALPA;
5769         memcpy(&ap->portName, &vport->fc_portname, sizeof(struct lpfc_name));
5770         memcpy(&ap->nodeName, &vport->fc_nodename, sizeof(struct lpfc_name));
5771         ap->DID = be32_to_cpu(vport->fc_myDID);
5772
5773         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
5774                       "Issue ACC ADISC: did:x%x flg:x%x refcnt %d",
5775                       ndlp->nlp_DID, ndlp->nlp_flag, kref_read(&ndlp->kref));
5776
5777         phba->fc_stat.elsXmitACC++;
5778         elsiocb->iocb_cmpl = lpfc_cmpl_els_rsp;
5779         elsiocb->context1 = lpfc_nlp_get(ndlp);
5780         if (!elsiocb->context1) {
5781                 lpfc_els_free_iocb(phba, elsiocb);
5782                 return 1;
5783         }
5784
5785         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
5786         if (rc == IOCB_ERROR) {
5787                 lpfc_els_free_iocb(phba, elsiocb);
5788                 lpfc_nlp_put(ndlp);
5789                 return 1;
5790         }
5791
5792         /* Xmit ELS ACC response tag <ulpIoTag> */
5793         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
5794                          "0128 Xmit ELS ACC response Status: x%x, IoTag: x%x, "
5795                          "XRI: x%x, DID: x%x, nlp_flag: x%x nlp_state: x%x "
5796                          "RPI: x%x, fc_flag x%x\n",
5797                          rc, elsiocb->iotag, elsiocb->sli4_xritag,
5798                          ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
5799                          ndlp->nlp_rpi, vport->fc_flag);
5800         return 0;
5801 }
5802
5803 /**
5804  * lpfc_els_rsp_prli_acc - Prepare and issue acc response to prli iocb cmd
5805  * @vport: pointer to a virtual N_Port data structure.
5806  * @oldiocb: pointer to the original lpfc command iocb data structure.
5807  * @ndlp: pointer to a node-list data structure.
5808  *
5809  * This routine prepares and issues an Accept (ACC) response to Process
5810  * Login (PRLI) ELS command. It simply prepares the payload of the IOCB
5811  * and invokes the lpfc_sli_issue_iocb() routine to send out the command.
5812  *
5813  * Note that the ndlp reference count will be incremented by 1 for holding the
5814  * ndlp and the reference to ndlp will be stored into the context1 field of
5815  * the IOCB for the completion callback function to the PRLI Accept response
5816  * ELS IOCB command.
5817  *
5818  * Return code
5819  *   0 - Successfully issued acc prli response
5820  *   1 - Failed to issue acc prli response
5821  **/
5822 int
5823 lpfc_els_rsp_prli_acc(struct lpfc_vport *vport, struct lpfc_iocbq *oldiocb,
5824                       struct lpfc_nodelist *ndlp)
5825 {
5826         struct lpfc_hba  *phba = vport->phba;
5827         PRLI *npr;
5828         struct lpfc_nvme_prli *npr_nvme;
5829         lpfc_vpd_t *vpd;
5830         IOCB_t *icmd;
5831         IOCB_t *oldcmd;
5832         struct lpfc_iocbq *elsiocb;
5833         uint8_t *pcmd;
5834         uint16_t cmdsize;
5835         uint32_t prli_fc4_req, *req_payload;
5836         struct lpfc_dmabuf *req_buf;
5837         int rc;
5838         u32 elsrspcmd;
5839
5840         /* Need the incoming PRLI payload to determine if the ACC is for an
5841          * FC4 or NVME PRLI type.  The PRLI type is at word 1.
5842          */
5843         req_buf = (struct lpfc_dmabuf *)oldiocb->context2;
5844         req_payload = (((uint32_t *)req_buf->virt) + 1);
5845
5846         /* PRLI type payload is at byte 3 for FCP or NVME. */
5847         prli_fc4_req = be32_to_cpu(*req_payload);
5848         prli_fc4_req = (prli_fc4_req >> 24) & 0xff;
5849         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
5850                          "6127 PRLI_ACC:  Req Type x%x, Word1 x%08x\n",
5851                          prli_fc4_req, *((uint32_t *)req_payload));
5852
5853         if (prli_fc4_req == PRLI_FCP_TYPE) {
5854                 cmdsize = sizeof(uint32_t) + sizeof(PRLI);
5855                 elsrspcmd = (ELS_CMD_ACC | (ELS_CMD_PRLI & ~ELS_RSP_MASK));
5856         } else if (prli_fc4_req & PRLI_NVME_TYPE) {
5857                 cmdsize = sizeof(uint32_t) + sizeof(struct lpfc_nvme_prli);
5858                 elsrspcmd = (ELS_CMD_ACC | (ELS_CMD_NVMEPRLI & ~ELS_RSP_MASK));
5859         } else {
5860                 return 1;
5861         }
5862
5863         elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, oldiocb->retry, ndlp,
5864                 ndlp->nlp_DID, elsrspcmd);
5865         if (!elsiocb)
5866                 return 1;
5867
5868         icmd = &elsiocb->iocb;
5869         oldcmd = &oldiocb->iocb;
5870         icmd->ulpContext = oldcmd->ulpContext;  /* Xri / rx_id */
5871         icmd->unsli3.rcvsli3.ox_id = oldcmd->unsli3.rcvsli3.ox_id;
5872
5873         /* Xmit PRLI ACC response tag <ulpIoTag> */
5874         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
5875                          "0131 Xmit PRLI ACC response tag x%x xri x%x, "
5876                          "did x%x, nlp_flag x%x, nlp_state x%x, rpi x%x\n",
5877                          elsiocb->iotag, elsiocb->iocb.ulpContext,
5878                          ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
5879                          ndlp->nlp_rpi);
5880         pcmd = (uint8_t *) (((struct lpfc_dmabuf *) elsiocb->context2)->virt);
5881         memset(pcmd, 0, cmdsize);
5882
5883         *((uint32_t *)(pcmd)) = elsrspcmd;
5884         pcmd += sizeof(uint32_t);
5885
5886         /* For PRLI, remainder of payload is PRLI parameter page */
5887         vpd = &phba->vpd;
5888
5889         if (prli_fc4_req == PRLI_FCP_TYPE) {
5890                 /*
5891                  * If the remote port is a target and our firmware version
5892                  * is 3.20 or later, set the following bits for FC-TAPE
5893                  * support.
5894                  */
5895                 npr = (PRLI *) pcmd;
5896                 if ((ndlp->nlp_type & NLP_FCP_TARGET) &&
5897                     (vpd->rev.feaLevelHigh >= 0x02)) {
5898                         npr->ConfmComplAllowed = 1;
5899                         npr->Retry = 1;
5900                         npr->TaskRetryIdReq = 1;
5901                 }
5902                 npr->acceptRspCode = PRLI_REQ_EXECUTED;
5903                 npr->estabImagePair = 1;
5904                 npr->readXferRdyDis = 1;
5905                 npr->ConfmComplAllowed = 1;
5906                 npr->prliType = PRLI_FCP_TYPE;
5907                 npr->initiatorFunc = 1;
5908         } else if (prli_fc4_req & PRLI_NVME_TYPE) {
5909                 /* Respond with an NVME PRLI Type */
5910                 npr_nvme = (struct lpfc_nvme_prli *) pcmd;
5911                 bf_set(prli_type_code, npr_nvme, PRLI_NVME_TYPE);
5912                 bf_set(prli_estabImagePair, npr_nvme, 0);  /* Should be 0 */
5913                 bf_set(prli_acc_rsp_code, npr_nvme, PRLI_REQ_EXECUTED);
5914                 if (phba->nvmet_support) {
5915                         bf_set(prli_tgt, npr_nvme, 1);
5916                         bf_set(prli_disc, npr_nvme, 1);
5917                         if (phba->cfg_nvme_enable_fb) {
5918                                 bf_set(prli_fba, npr_nvme, 1);
5919
5920                                 /* TBD.  Target mode needs to post buffers
5921                                  * that support the configured first burst
5922                                  * byte size.
5923                                  */
5924                                 bf_set(prli_fb_sz, npr_nvme,
5925                                        phba->cfg_nvmet_fb_size);
5926                         }
5927                 } else {
5928                         bf_set(prli_init, npr_nvme, 1);
5929                 }
5930
5931                 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC,
5932                                  "6015 NVME issue PRLI ACC word1 x%08x "
5933                                  "word4 x%08x word5 x%08x flag x%x, "
5934                                  "fcp_info x%x nlp_type x%x\n",
5935                                  npr_nvme->word1, npr_nvme->word4,
5936                                  npr_nvme->word5, ndlp->nlp_flag,
5937                                  ndlp->nlp_fcp_info, ndlp->nlp_type);
5938                 npr_nvme->word1 = cpu_to_be32(npr_nvme->word1);
5939                 npr_nvme->word4 = cpu_to_be32(npr_nvme->word4);
5940                 npr_nvme->word5 = cpu_to_be32(npr_nvme->word5);
5941         } else
5942                 lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
5943                                  "6128 Unknown FC_TYPE x%x x%x ndlp x%06x\n",
5944                                  prli_fc4_req, ndlp->nlp_fc4_type,
5945                                  ndlp->nlp_DID);
5946
5947         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
5948                       "Issue ACC PRLI:  did:x%x flg:x%x",
5949                       ndlp->nlp_DID, ndlp->nlp_flag, kref_read(&ndlp->kref));
5950
5951         phba->fc_stat.elsXmitACC++;
5952         elsiocb->iocb_cmpl = lpfc_cmpl_els_rsp;
5953         elsiocb->context1 =  lpfc_nlp_get(ndlp);
5954         if (!elsiocb->context1) {
5955                 lpfc_els_free_iocb(phba, elsiocb);
5956                 return 1;
5957         }
5958
5959         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
5960         if (rc == IOCB_ERROR) {
5961                 lpfc_els_free_iocb(phba, elsiocb);
5962                 lpfc_nlp_put(ndlp);
5963                 return 1;
5964         }
5965
5966         return 0;
5967 }
5968
5969 /**
5970  * lpfc_els_rsp_rnid_acc - Issue rnid acc response iocb command
5971  * @vport: pointer to a virtual N_Port data structure.
5972  * @format: rnid command format.
5973  * @oldiocb: pointer to the original lpfc command iocb data structure.
5974  * @ndlp: pointer to a node-list data structure.
5975  *
5976  * This routine issues a Request Node Identification Data (RNID) Accept
5977  * (ACC) response. It constructs the RNID ACC response command according to
5978  * the proper @format and then calls the lpfc_sli_issue_iocb() routine to
5979  * issue the response.
5980  *
5981  * Note that the ndlp reference count will be incremented by 1 for holding the
5982  * ndlp and the reference to ndlp will be stored into the context1 field of
5983  * the IOCB for the completion callback function.
5984  *
5985  * Return code
5986  *   0 - Successfully issued acc rnid response
5987  *   1 - Failed to issue acc rnid response
5988  **/
5989 static int
5990 lpfc_els_rsp_rnid_acc(struct lpfc_vport *vport, uint8_t format,
5991                       struct lpfc_iocbq *oldiocb, struct lpfc_nodelist *ndlp)
5992 {
5993         struct lpfc_hba  *phba = vport->phba;
5994         RNID *rn;
5995         IOCB_t *icmd, *oldcmd;
5996         struct lpfc_iocbq *elsiocb;
5997         uint8_t *pcmd;
5998         uint16_t cmdsize;
5999         int rc;
6000
6001         cmdsize = sizeof(uint32_t) + sizeof(uint32_t)
6002                                         + (2 * sizeof(struct lpfc_name));
6003         if (format)
6004                 cmdsize += sizeof(RNID_TOP_DISC);
6005
6006         elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, oldiocb->retry, ndlp,
6007                                      ndlp->nlp_DID, ELS_CMD_ACC);
6008         if (!elsiocb)
6009                 return 1;
6010
6011         icmd = &elsiocb->iocb;
6012         oldcmd = &oldiocb->iocb;
6013         icmd->ulpContext = oldcmd->ulpContext;  /* Xri / rx_id */
6014         icmd->unsli3.rcvsli3.ox_id = oldcmd->unsli3.rcvsli3.ox_id;
6015
6016         /* Xmit RNID ACC response tag <ulpIoTag> */
6017         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
6018                          "0132 Xmit RNID ACC response tag x%x xri x%x\n",
6019                          elsiocb->iotag, elsiocb->iocb.ulpContext);
6020         pcmd = (uint8_t *) (((struct lpfc_dmabuf *) elsiocb->context2)->virt);
6021         *((uint32_t *) (pcmd)) = ELS_CMD_ACC;
6022         pcmd += sizeof(uint32_t);
6023
6024         memset(pcmd, 0, sizeof(RNID));
6025         rn = (RNID *) (pcmd);
6026         rn->Format = format;
6027         rn->CommonLen = (2 * sizeof(struct lpfc_name));
6028         memcpy(&rn->portName, &vport->fc_portname, sizeof(struct lpfc_name));
6029         memcpy(&rn->nodeName, &vport->fc_nodename, sizeof(struct lpfc_name));
6030         switch (format) {
6031         case 0:
6032                 rn->SpecificLen = 0;
6033                 break;
6034         case RNID_TOPOLOGY_DISC:
6035                 rn->SpecificLen = sizeof(RNID_TOP_DISC);
6036                 memcpy(&rn->un.topologyDisc.portName,
6037                        &vport->fc_portname, sizeof(struct lpfc_name));
6038                 rn->un.topologyDisc.unitType = RNID_HBA;
6039                 rn->un.topologyDisc.physPort = 0;
6040                 rn->un.topologyDisc.attachedNodes = 0;
6041                 break;
6042         default:
6043                 rn->CommonLen = 0;
6044                 rn->SpecificLen = 0;
6045                 break;
6046         }
6047
6048         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
6049                       "Issue ACC RNID:  did:x%x flg:x%x refcnt %d",
6050                       ndlp->nlp_DID, ndlp->nlp_flag, kref_read(&ndlp->kref));
6051
6052         phba->fc_stat.elsXmitACC++;
6053         elsiocb->iocb_cmpl = lpfc_cmpl_els_rsp;
6054         elsiocb->context1 = lpfc_nlp_get(ndlp);
6055         if (!elsiocb->context1) {
6056                 lpfc_els_free_iocb(phba, elsiocb);
6057                 return 1;
6058         }
6059
6060         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
6061         if (rc == IOCB_ERROR) {
6062                 lpfc_els_free_iocb(phba, elsiocb);
6063                 lpfc_nlp_put(ndlp);
6064                 return 1;
6065         }
6066
6067         return 0;
6068 }
6069
6070 /**
6071  * lpfc_els_clear_rrq - Clear the rq that this rrq describes.
6072  * @vport: pointer to a virtual N_Port data structure.
6073  * @iocb: pointer to the lpfc command iocb data structure.
6074  * @ndlp: pointer to a node-list data structure.
6075  *
6076  * Return
6077  **/
6078 static void
6079 lpfc_els_clear_rrq(struct lpfc_vport *vport,
6080                    struct lpfc_iocbq *iocb, struct lpfc_nodelist *ndlp)
6081 {
6082         struct lpfc_hba  *phba = vport->phba;
6083         uint8_t *pcmd;
6084         struct RRQ *rrq;
6085         uint16_t rxid;
6086         uint16_t xri;
6087         struct lpfc_node_rrq *prrq;
6088
6089
6090         pcmd = (uint8_t *) (((struct lpfc_dmabuf *) iocb->context2)->virt);
6091         pcmd += sizeof(uint32_t);
6092         rrq = (struct RRQ *)pcmd;
6093         rrq->rrq_exchg = be32_to_cpu(rrq->rrq_exchg);
6094         rxid = bf_get(rrq_rxid, rrq);
6095
6096         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
6097                         "2883 Clear RRQ for SID:x%x OXID:x%x RXID:x%x"
6098                         " x%x x%x\n",
6099                         be32_to_cpu(bf_get(rrq_did, rrq)),
6100                         bf_get(rrq_oxid, rrq),
6101                         rxid,
6102                         iocb->iotag, iocb->iocb.ulpContext);
6103
6104         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
6105                 "Clear RRQ:  did:x%x flg:x%x exchg:x%.08x",
6106                 ndlp->nlp_DID, ndlp->nlp_flag, rrq->rrq_exchg);
6107         if (vport->fc_myDID == be32_to_cpu(bf_get(rrq_did, rrq)))
6108                 xri = bf_get(rrq_oxid, rrq);
6109         else
6110                 xri = rxid;
6111         prrq = lpfc_get_active_rrq(vport, xri, ndlp->nlp_DID);
6112         if (prrq)
6113                 lpfc_clr_rrq_active(phba, xri, prrq);
6114         return;
6115 }
6116
6117 /**
6118  * lpfc_els_rsp_echo_acc - Issue echo acc response
6119  * @vport: pointer to a virtual N_Port data structure.
6120  * @data: pointer to echo data to return in the accept.
6121  * @oldiocb: pointer to the original lpfc command iocb data structure.
6122  * @ndlp: pointer to a node-list data structure.
6123  *
6124  * Return code
6125  *   0 - Successfully issued acc echo response
6126  *   1 - Failed to issue acc echo response
6127  **/
6128 static int
6129 lpfc_els_rsp_echo_acc(struct lpfc_vport *vport, uint8_t *data,
6130                       struct lpfc_iocbq *oldiocb, struct lpfc_nodelist *ndlp)
6131 {
6132         struct lpfc_hba  *phba = vport->phba;
6133         struct lpfc_iocbq *elsiocb;
6134         uint8_t *pcmd;
6135         uint16_t cmdsize;
6136         int rc;
6137
6138         cmdsize = oldiocb->iocb.unsli3.rcvsli3.acc_len;
6139
6140         /* The accumulated length can exceed the BPL_SIZE.  For
6141          * now, use this as the limit
6142          */
6143         if (cmdsize > LPFC_BPL_SIZE)
6144                 cmdsize = LPFC_BPL_SIZE;
6145         elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, oldiocb->retry, ndlp,
6146                                      ndlp->nlp_DID, ELS_CMD_ACC);
6147         if (!elsiocb)
6148                 return 1;
6149
6150         elsiocb->iocb.ulpContext = oldiocb->iocb.ulpContext;  /* Xri / rx_id */
6151         elsiocb->iocb.unsli3.rcvsli3.ox_id = oldiocb->iocb.unsli3.rcvsli3.ox_id;
6152
6153         /* Xmit ECHO ACC response tag <ulpIoTag> */
6154         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
6155                          "2876 Xmit ECHO ACC response tag x%x xri x%x\n",
6156                          elsiocb->iotag, elsiocb->iocb.ulpContext);
6157         pcmd = (uint8_t *) (((struct lpfc_dmabuf *) elsiocb->context2)->virt);
6158         *((uint32_t *) (pcmd)) = ELS_CMD_ACC;
6159         pcmd += sizeof(uint32_t);
6160         memcpy(pcmd, data, cmdsize - sizeof(uint32_t));
6161
6162         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
6163                       "Issue ACC ECHO:  did:x%x flg:x%x refcnt %d",
6164                       ndlp->nlp_DID, ndlp->nlp_flag, kref_read(&ndlp->kref));
6165
6166         phba->fc_stat.elsXmitACC++;
6167         elsiocb->iocb_cmpl = lpfc_cmpl_els_rsp;
6168         elsiocb->context1 =  lpfc_nlp_get(ndlp);
6169         if (!elsiocb->context1) {
6170                 lpfc_els_free_iocb(phba, elsiocb);
6171                 return 1;
6172         }
6173
6174         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
6175         if (rc == IOCB_ERROR) {
6176                 lpfc_els_free_iocb(phba, elsiocb);
6177                 lpfc_nlp_put(ndlp);
6178                 return 1;
6179         }
6180
6181         return 0;
6182 }
6183
6184 /**
6185  * lpfc_els_disc_adisc - Issue remaining adisc iocbs to npr nodes of a vport
6186  * @vport: pointer to a host virtual N_Port data structure.
6187  *
6188  * This routine issues Address Discover (ADISC) ELS commands to those
6189  * N_Ports which are in node port recovery state and ADISC has not been issued
6190  * for the @vport. Each time an ELS ADISC IOCB is issued by invoking the
6191  * lpfc_issue_els_adisc() routine, the per @vport number of discover count
6192  * (num_disc_nodes) shall be incremented. If the num_disc_nodes reaches a
6193  * pre-configured threshold (cfg_discovery_threads), the @vport fc_flag will
6194  * be marked with FC_NLP_MORE bit and the process of issuing remaining ADISC
6195  * IOCBs quit for later pick up. On the other hand, after walking through
6196  * all the ndlps with the @vport and there is none ADISC IOCB issued, the
6197  * @vport fc_flag shall be cleared with FC_NLP_MORE bit indicating there is
6198  * no more ADISC need to be sent.
6199  *
6200  * Return code
6201  *    The number of N_Ports with adisc issued.
6202  **/
6203 int
6204 lpfc_els_disc_adisc(struct lpfc_vport *vport)
6205 {
6206         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
6207         struct lpfc_nodelist *ndlp, *next_ndlp;
6208         int sentadisc = 0;
6209
6210         /* go thru NPR nodes and issue any remaining ELS ADISCs */
6211         list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) {
6212
6213                 if (ndlp->nlp_state != NLP_STE_NPR_NODE ||
6214                     !(ndlp->nlp_flag & NLP_NPR_ADISC))
6215                         continue;
6216
6217                 spin_lock_irq(&ndlp->lock);
6218                 ndlp->nlp_flag &= ~NLP_NPR_ADISC;
6219                 spin_unlock_irq(&ndlp->lock);
6220
6221                 if (!(ndlp->nlp_flag & NLP_NPR_2B_DISC)) {
6222                         /* This node was marked for ADISC but was not picked
6223                          * for discovery. This is possible if the node was
6224                          * missing in gidft response.
6225                          *
6226                          * At time of marking node for ADISC, we skipped unreg
6227                          * from backend
6228                          */
6229                         lpfc_nlp_unreg_node(vport, ndlp);
6230                         lpfc_unreg_rpi(vport, ndlp);
6231                         continue;
6232                 }
6233
6234                 ndlp->nlp_prev_state = ndlp->nlp_state;
6235                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_ADISC_ISSUE);
6236                 lpfc_issue_els_adisc(vport, ndlp, 0);
6237                 sentadisc++;
6238                 vport->num_disc_nodes++;
6239                 if (vport->num_disc_nodes >=
6240                                 vport->cfg_discovery_threads) {
6241                         spin_lock_irq(shost->host_lock);
6242                         vport->fc_flag |= FC_NLP_MORE;
6243                         spin_unlock_irq(shost->host_lock);
6244                         break;
6245                 }
6246
6247         }
6248         if (sentadisc == 0) {
6249                 spin_lock_irq(shost->host_lock);
6250                 vport->fc_flag &= ~FC_NLP_MORE;
6251                 spin_unlock_irq(shost->host_lock);
6252         }
6253         return sentadisc;
6254 }
6255
6256 /**
6257  * lpfc_els_disc_plogi - Issue plogi for all npr nodes of a vport before adisc
6258  * @vport: pointer to a host virtual N_Port data structure.
6259  *
6260  * This routine issues Port Login (PLOGI) ELS commands to all the N_Ports
6261  * which are in node port recovery state, with a @vport. Each time an ELS
6262  * ADISC PLOGI IOCB is issued by invoking the lpfc_issue_els_plogi() routine,
6263  * the per @vport number of discover count (num_disc_nodes) shall be
6264  * incremented. If the num_disc_nodes reaches a pre-configured threshold
6265  * (cfg_discovery_threads), the @vport fc_flag will be marked with FC_NLP_MORE
6266  * bit set and quit the process of issuing remaining ADISC PLOGIN IOCBs for
6267  * later pick up. On the other hand, after walking through all the ndlps with
6268  * the @vport and there is none ADISC PLOGI IOCB issued, the @vport fc_flag
6269  * shall be cleared with the FC_NLP_MORE bit indicating there is no more ADISC
6270  * PLOGI need to be sent.
6271  *
6272  * Return code
6273  *   The number of N_Ports with plogi issued.
6274  **/
6275 int
6276 lpfc_els_disc_plogi(struct lpfc_vport *vport)
6277 {
6278         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
6279         struct lpfc_nodelist *ndlp, *next_ndlp;
6280         int sentplogi = 0;
6281
6282         /* go thru NPR nodes and issue any remaining ELS PLOGIs */
6283         list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) {
6284                 if (ndlp->nlp_state == NLP_STE_NPR_NODE &&
6285                                 (ndlp->nlp_flag & NLP_NPR_2B_DISC) != 0 &&
6286                                 (ndlp->nlp_flag & NLP_DELAY_TMO) == 0 &&
6287                                 (ndlp->nlp_flag & NLP_NPR_ADISC) == 0) {
6288                         ndlp->nlp_prev_state = ndlp->nlp_state;
6289                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
6290                         lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0);
6291                         sentplogi++;
6292                         vport->num_disc_nodes++;
6293                         if (vport->num_disc_nodes >=
6294                                         vport->cfg_discovery_threads) {
6295                                 spin_lock_irq(shost->host_lock);
6296                                 vport->fc_flag |= FC_NLP_MORE;
6297                                 spin_unlock_irq(shost->host_lock);
6298                                 break;
6299                         }
6300                 }
6301         }
6302
6303         lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
6304                          "6452 Discover PLOGI %d flag x%x\n",
6305                          sentplogi, vport->fc_flag);
6306
6307         if (sentplogi) {
6308                 lpfc_set_disctmo(vport);
6309         }
6310         else {
6311                 spin_lock_irq(shost->host_lock);
6312                 vport->fc_flag &= ~FC_NLP_MORE;
6313                 spin_unlock_irq(shost->host_lock);
6314         }
6315         return sentplogi;
6316 }
6317
6318 static uint32_t
6319 lpfc_rdp_res_link_service(struct fc_rdp_link_service_desc *desc,
6320                 uint32_t word0)
6321 {
6322
6323         desc->tag = cpu_to_be32(RDP_LINK_SERVICE_DESC_TAG);
6324         desc->payload.els_req = word0;
6325         desc->length = cpu_to_be32(sizeof(desc->payload));
6326
6327         return sizeof(struct fc_rdp_link_service_desc);
6328 }
6329
6330 static uint32_t
6331 lpfc_rdp_res_sfp_desc(struct fc_rdp_sfp_desc *desc,
6332                 uint8_t *page_a0, uint8_t *page_a2)
6333 {
6334         uint16_t wavelength;
6335         uint16_t temperature;
6336         uint16_t rx_power;
6337         uint16_t tx_bias;
6338         uint16_t tx_power;
6339         uint16_t vcc;
6340         uint16_t flag = 0;
6341         struct sff_trasnceiver_codes_byte4 *trasn_code_byte4;
6342         struct sff_trasnceiver_codes_byte5 *trasn_code_byte5;
6343
6344         desc->tag = cpu_to_be32(RDP_SFP_DESC_TAG);
6345
6346         trasn_code_byte4 = (struct sff_trasnceiver_codes_byte4 *)
6347                         &page_a0[SSF_TRANSCEIVER_CODE_B4];
6348         trasn_code_byte5 = (struct sff_trasnceiver_codes_byte5 *)
6349                         &page_a0[SSF_TRANSCEIVER_CODE_B5];
6350
6351         if ((trasn_code_byte4->fc_sw_laser) ||
6352             (trasn_code_byte5->fc_sw_laser_sl) ||
6353             (trasn_code_byte5->fc_sw_laser_sn)) {  /* check if its short WL */
6354                 flag |= (SFP_FLAG_PT_SWLASER << SFP_FLAG_PT_SHIFT);
6355         } else if (trasn_code_byte4->fc_lw_laser) {
6356                 wavelength = (page_a0[SSF_WAVELENGTH_B1] << 8) |
6357                         page_a0[SSF_WAVELENGTH_B0];
6358                 if (wavelength == SFP_WAVELENGTH_LC1310)
6359                         flag |= SFP_FLAG_PT_LWLASER_LC1310 << SFP_FLAG_PT_SHIFT;
6360                 if (wavelength == SFP_WAVELENGTH_LL1550)
6361                         flag |= SFP_FLAG_PT_LWLASER_LL1550 << SFP_FLAG_PT_SHIFT;
6362         }
6363         /* check if its SFP+ */
6364         flag |= ((page_a0[SSF_IDENTIFIER] == SFF_PG0_IDENT_SFP) ?
6365                         SFP_FLAG_CT_SFP_PLUS : SFP_FLAG_CT_UNKNOWN)
6366                                         << SFP_FLAG_CT_SHIFT;
6367
6368         /* check if its OPTICAL */
6369         flag |= ((page_a0[SSF_CONNECTOR] == SFF_PG0_CONNECTOR_LC) ?
6370                         SFP_FLAG_IS_OPTICAL_PORT : 0)
6371                                         << SFP_FLAG_IS_OPTICAL_SHIFT;
6372
6373         temperature = (page_a2[SFF_TEMPERATURE_B1] << 8 |
6374                 page_a2[SFF_TEMPERATURE_B0]);
6375         vcc = (page_a2[SFF_VCC_B1] << 8 |
6376                 page_a2[SFF_VCC_B0]);
6377         tx_power = (page_a2[SFF_TXPOWER_B1] << 8 |
6378                 page_a2[SFF_TXPOWER_B0]);
6379         tx_bias = (page_a2[SFF_TX_BIAS_CURRENT_B1] << 8 |
6380                 page_a2[SFF_TX_BIAS_CURRENT_B0]);
6381         rx_power = (page_a2[SFF_RXPOWER_B1] << 8 |
6382                 page_a2[SFF_RXPOWER_B0]);
6383         desc->sfp_info.temperature = cpu_to_be16(temperature);
6384         desc->sfp_info.rx_power = cpu_to_be16(rx_power);
6385         desc->sfp_info.tx_bias = cpu_to_be16(tx_bias);
6386         desc->sfp_info.tx_power = cpu_to_be16(tx_power);
6387         desc->sfp_info.vcc = cpu_to_be16(vcc);
6388
6389         desc->sfp_info.flags = cpu_to_be16(flag);
6390         desc->length = cpu_to_be32(sizeof(desc->sfp_info));
6391
6392         return sizeof(struct fc_rdp_sfp_desc);
6393 }
6394
6395 static uint32_t
6396 lpfc_rdp_res_link_error(struct fc_rdp_link_error_status_desc *desc,
6397                 READ_LNK_VAR *stat)
6398 {
6399         uint32_t type;
6400
6401         desc->tag = cpu_to_be32(RDP_LINK_ERROR_STATUS_DESC_TAG);
6402
6403         type = VN_PT_PHY_PF_PORT << VN_PT_PHY_SHIFT;
6404
6405         desc->info.port_type = cpu_to_be32(type);
6406
6407         desc->info.link_status.link_failure_cnt =
6408                 cpu_to_be32(stat->linkFailureCnt);
6409         desc->info.link_status.loss_of_synch_cnt =
6410                 cpu_to_be32(stat->lossSyncCnt);
6411         desc->info.link_status.loss_of_signal_cnt =
6412                 cpu_to_be32(stat->lossSignalCnt);
6413         desc->info.link_status.primitive_seq_proto_err =
6414                 cpu_to_be32(stat->primSeqErrCnt);
6415         desc->info.link_status.invalid_trans_word =
6416                 cpu_to_be32(stat->invalidXmitWord);
6417         desc->info.link_status.invalid_crc_cnt = cpu_to_be32(stat->crcCnt);
6418
6419         desc->length = cpu_to_be32(sizeof(desc->info));
6420
6421         return sizeof(struct fc_rdp_link_error_status_desc);
6422 }
6423
6424 static uint32_t
6425 lpfc_rdp_res_bbc_desc(struct fc_rdp_bbc_desc *desc, READ_LNK_VAR *stat,
6426                       struct lpfc_vport *vport)
6427 {
6428         uint32_t bbCredit;
6429
6430         desc->tag = cpu_to_be32(RDP_BBC_DESC_TAG);
6431
6432         bbCredit = vport->fc_sparam.cmn.bbCreditLsb |
6433                         (vport->fc_sparam.cmn.bbCreditMsb << 8);
6434         desc->bbc_info.port_bbc = cpu_to_be32(bbCredit);
6435         if (vport->phba->fc_topology != LPFC_TOPOLOGY_LOOP) {
6436                 bbCredit = vport->phba->fc_fabparam.cmn.bbCreditLsb |
6437                         (vport->phba->fc_fabparam.cmn.bbCreditMsb << 8);
6438                 desc->bbc_info.attached_port_bbc = cpu_to_be32(bbCredit);
6439         } else {
6440                 desc->bbc_info.attached_port_bbc = 0;
6441         }
6442
6443         desc->bbc_info.rtt = 0;
6444         desc->length = cpu_to_be32(sizeof(desc->bbc_info));
6445
6446         return sizeof(struct fc_rdp_bbc_desc);
6447 }
6448
6449 static uint32_t
6450 lpfc_rdp_res_oed_temp_desc(struct lpfc_hba *phba,
6451                            struct fc_rdp_oed_sfp_desc *desc, uint8_t *page_a2)
6452 {
6453         uint32_t flags = 0;
6454
6455         desc->tag = cpu_to_be32(RDP_OED_DESC_TAG);
6456
6457         desc->oed_info.hi_alarm = page_a2[SSF_TEMP_HIGH_ALARM];
6458         desc->oed_info.lo_alarm = page_a2[SSF_TEMP_LOW_ALARM];
6459         desc->oed_info.hi_warning = page_a2[SSF_TEMP_HIGH_WARNING];
6460         desc->oed_info.lo_warning = page_a2[SSF_TEMP_LOW_WARNING];
6461
6462         if (phba->sfp_alarm & LPFC_TRANSGRESSION_HIGH_TEMPERATURE)
6463                 flags |= RDP_OET_HIGH_ALARM;
6464         if (phba->sfp_alarm & LPFC_TRANSGRESSION_LOW_TEMPERATURE)
6465                 flags |= RDP_OET_LOW_ALARM;
6466         if (phba->sfp_warning & LPFC_TRANSGRESSION_HIGH_TEMPERATURE)
6467                 flags |= RDP_OET_HIGH_WARNING;
6468         if (phba->sfp_warning & LPFC_TRANSGRESSION_LOW_TEMPERATURE)
6469                 flags |= RDP_OET_LOW_WARNING;
6470
6471         flags |= ((0xf & RDP_OED_TEMPERATURE) << RDP_OED_TYPE_SHIFT);
6472         desc->oed_info.function_flags = cpu_to_be32(flags);
6473         desc->length = cpu_to_be32(sizeof(desc->oed_info));
6474         return sizeof(struct fc_rdp_oed_sfp_desc);
6475 }
6476
6477 static uint32_t
6478 lpfc_rdp_res_oed_voltage_desc(struct lpfc_hba *phba,
6479                               struct fc_rdp_oed_sfp_desc *desc,
6480                               uint8_t *page_a2)
6481 {
6482         uint32_t flags = 0;
6483
6484         desc->tag = cpu_to_be32(RDP_OED_DESC_TAG);
6485
6486         desc->oed_info.hi_alarm = page_a2[SSF_VOLTAGE_HIGH_ALARM];
6487         desc->oed_info.lo_alarm = page_a2[SSF_VOLTAGE_LOW_ALARM];
6488         desc->oed_info.hi_warning = page_a2[SSF_VOLTAGE_HIGH_WARNING];
6489         desc->oed_info.lo_warning = page_a2[SSF_VOLTAGE_LOW_WARNING];
6490
6491         if (phba->sfp_alarm & LPFC_TRANSGRESSION_HIGH_VOLTAGE)
6492                 flags |= RDP_OET_HIGH_ALARM;
6493         if (phba->sfp_alarm & LPFC_TRANSGRESSION_LOW_VOLTAGE)
6494                 flags |= RDP_OET_LOW_ALARM;
6495         if (phba->sfp_warning & LPFC_TRANSGRESSION_HIGH_VOLTAGE)
6496                 flags |= RDP_OET_HIGH_WARNING;
6497         if (phba->sfp_warning & LPFC_TRANSGRESSION_LOW_VOLTAGE)
6498                 flags |= RDP_OET_LOW_WARNING;
6499
6500         flags |= ((0xf & RDP_OED_VOLTAGE) << RDP_OED_TYPE_SHIFT);
6501         desc->oed_info.function_flags = cpu_to_be32(flags);
6502         desc->length = cpu_to_be32(sizeof(desc->oed_info));
6503         return sizeof(struct fc_rdp_oed_sfp_desc);
6504 }
6505
6506 static uint32_t
6507 lpfc_rdp_res_oed_txbias_desc(struct lpfc_hba *phba,
6508                              struct fc_rdp_oed_sfp_desc *desc,
6509                              uint8_t *page_a2)
6510 {
6511         uint32_t flags = 0;
6512
6513         desc->tag = cpu_to_be32(RDP_OED_DESC_TAG);
6514
6515         desc->oed_info.hi_alarm = page_a2[SSF_BIAS_HIGH_ALARM];
6516         desc->oed_info.lo_alarm = page_a2[SSF_BIAS_LOW_ALARM];
6517         desc->oed_info.hi_warning = page_a2[SSF_BIAS_HIGH_WARNING];
6518         desc->oed_info.lo_warning = page_a2[SSF_BIAS_LOW_WARNING];
6519
6520         if (phba->sfp_alarm & LPFC_TRANSGRESSION_HIGH_TXBIAS)
6521                 flags |= RDP_OET_HIGH_ALARM;
6522         if (phba->sfp_alarm & LPFC_TRANSGRESSION_LOW_TXBIAS)
6523                 flags |= RDP_OET_LOW_ALARM;
6524         if (phba->sfp_warning & LPFC_TRANSGRESSION_HIGH_TXBIAS)
6525                 flags |= RDP_OET_HIGH_WARNING;
6526         if (phba->sfp_warning & LPFC_TRANSGRESSION_LOW_TXBIAS)
6527                 flags |= RDP_OET_LOW_WARNING;
6528
6529         flags |= ((0xf & RDP_OED_TXBIAS) << RDP_OED_TYPE_SHIFT);
6530         desc->oed_info.function_flags = cpu_to_be32(flags);
6531         desc->length = cpu_to_be32(sizeof(desc->oed_info));
6532         return sizeof(struct fc_rdp_oed_sfp_desc);
6533 }
6534
6535 static uint32_t
6536 lpfc_rdp_res_oed_txpower_desc(struct lpfc_hba *phba,
6537                               struct fc_rdp_oed_sfp_desc *desc,
6538                               uint8_t *page_a2)
6539 {
6540         uint32_t flags = 0;
6541
6542         desc->tag = cpu_to_be32(RDP_OED_DESC_TAG);
6543
6544         desc->oed_info.hi_alarm = page_a2[SSF_TXPOWER_HIGH_ALARM];
6545         desc->oed_info.lo_alarm = page_a2[SSF_TXPOWER_LOW_ALARM];
6546         desc->oed_info.hi_warning = page_a2[SSF_TXPOWER_HIGH_WARNING];
6547         desc->oed_info.lo_warning = page_a2[SSF_TXPOWER_LOW_WARNING];
6548
6549         if (phba->sfp_alarm & LPFC_TRANSGRESSION_HIGH_TXPOWER)
6550                 flags |= RDP_OET_HIGH_ALARM;
6551         if (phba->sfp_alarm & LPFC_TRANSGRESSION_LOW_TXPOWER)
6552                 flags |= RDP_OET_LOW_ALARM;
6553         if (phba->sfp_warning & LPFC_TRANSGRESSION_HIGH_TXPOWER)
6554                 flags |= RDP_OET_HIGH_WARNING;
6555         if (phba->sfp_warning & LPFC_TRANSGRESSION_LOW_TXPOWER)
6556                 flags |= RDP_OET_LOW_WARNING;
6557
6558         flags |= ((0xf & RDP_OED_TXPOWER) << RDP_OED_TYPE_SHIFT);
6559         desc->oed_info.function_flags = cpu_to_be32(flags);
6560         desc->length = cpu_to_be32(sizeof(desc->oed_info));
6561         return sizeof(struct fc_rdp_oed_sfp_desc);
6562 }
6563
6564
6565 static uint32_t
6566 lpfc_rdp_res_oed_rxpower_desc(struct lpfc_hba *phba,
6567                               struct fc_rdp_oed_sfp_desc *desc,
6568                               uint8_t *page_a2)
6569 {
6570         uint32_t flags = 0;
6571
6572         desc->tag = cpu_to_be32(RDP_OED_DESC_TAG);
6573
6574         desc->oed_info.hi_alarm = page_a2[SSF_RXPOWER_HIGH_ALARM];
6575         desc->oed_info.lo_alarm = page_a2[SSF_RXPOWER_LOW_ALARM];
6576         desc->oed_info.hi_warning = page_a2[SSF_RXPOWER_HIGH_WARNING];
6577         desc->oed_info.lo_warning = page_a2[SSF_RXPOWER_LOW_WARNING];
6578
6579         if (phba->sfp_alarm & LPFC_TRANSGRESSION_HIGH_RXPOWER)
6580                 flags |= RDP_OET_HIGH_ALARM;
6581         if (phba->sfp_alarm & LPFC_TRANSGRESSION_LOW_RXPOWER)
6582                 flags |= RDP_OET_LOW_ALARM;
6583         if (phba->sfp_warning & LPFC_TRANSGRESSION_HIGH_RXPOWER)
6584                 flags |= RDP_OET_HIGH_WARNING;
6585         if (phba->sfp_warning & LPFC_TRANSGRESSION_LOW_RXPOWER)
6586                 flags |= RDP_OET_LOW_WARNING;
6587
6588         flags |= ((0xf & RDP_OED_RXPOWER) << RDP_OED_TYPE_SHIFT);
6589         desc->oed_info.function_flags = cpu_to_be32(flags);
6590         desc->length = cpu_to_be32(sizeof(desc->oed_info));
6591         return sizeof(struct fc_rdp_oed_sfp_desc);
6592 }
6593
6594 static uint32_t
6595 lpfc_rdp_res_opd_desc(struct fc_rdp_opd_sfp_desc *desc,
6596                       uint8_t *page_a0, struct lpfc_vport *vport)
6597 {
6598         desc->tag = cpu_to_be32(RDP_OPD_DESC_TAG);
6599         memcpy(desc->opd_info.vendor_name, &page_a0[SSF_VENDOR_NAME], 16);
6600         memcpy(desc->opd_info.model_number, &page_a0[SSF_VENDOR_PN], 16);
6601         memcpy(desc->opd_info.serial_number, &page_a0[SSF_VENDOR_SN], 16);
6602         memcpy(desc->opd_info.revision, &page_a0[SSF_VENDOR_REV], 4);
6603         memcpy(desc->opd_info.date, &page_a0[SSF_DATE_CODE], 8);
6604         desc->length = cpu_to_be32(sizeof(desc->opd_info));
6605         return sizeof(struct fc_rdp_opd_sfp_desc);
6606 }
6607
6608 static uint32_t
6609 lpfc_rdp_res_fec_desc(struct fc_fec_rdp_desc *desc, READ_LNK_VAR *stat)
6610 {
6611         if (bf_get(lpfc_read_link_stat_gec2, stat) == 0)
6612                 return 0;
6613         desc->tag = cpu_to_be32(RDP_FEC_DESC_TAG);
6614
6615         desc->info.CorrectedBlocks =
6616                 cpu_to_be32(stat->fecCorrBlkCount);
6617         desc->info.UncorrectableBlocks =
6618                 cpu_to_be32(stat->fecUncorrBlkCount);
6619
6620         desc->length = cpu_to_be32(sizeof(desc->info));
6621
6622         return sizeof(struct fc_fec_rdp_desc);
6623 }
6624
6625 static uint32_t
6626 lpfc_rdp_res_speed(struct fc_rdp_port_speed_desc *desc, struct lpfc_hba *phba)
6627 {
6628         uint16_t rdp_cap = 0;
6629         uint16_t rdp_speed;
6630
6631         desc->tag = cpu_to_be32(RDP_PORT_SPEED_DESC_TAG);
6632
6633         switch (phba->fc_linkspeed) {
6634         case LPFC_LINK_SPEED_1GHZ:
6635                 rdp_speed = RDP_PS_1GB;
6636                 break;
6637         case LPFC_LINK_SPEED_2GHZ:
6638                 rdp_speed = RDP_PS_2GB;
6639                 break;
6640         case LPFC_LINK_SPEED_4GHZ:
6641                 rdp_speed = RDP_PS_4GB;
6642                 break;
6643         case LPFC_LINK_SPEED_8GHZ:
6644                 rdp_speed = RDP_PS_8GB;
6645                 break;
6646         case LPFC_LINK_SPEED_10GHZ:
6647                 rdp_speed = RDP_PS_10GB;
6648                 break;
6649         case LPFC_LINK_SPEED_16GHZ:
6650                 rdp_speed = RDP_PS_16GB;
6651                 break;
6652         case LPFC_LINK_SPEED_32GHZ:
6653                 rdp_speed = RDP_PS_32GB;
6654                 break;
6655         case LPFC_LINK_SPEED_64GHZ:
6656                 rdp_speed = RDP_PS_64GB;
6657                 break;
6658         case LPFC_LINK_SPEED_128GHZ:
6659                 rdp_speed = RDP_PS_128GB;
6660                 break;
6661         case LPFC_LINK_SPEED_256GHZ:
6662                 rdp_speed = RDP_PS_256GB;
6663                 break;
6664         default:
6665                 rdp_speed = RDP_PS_UNKNOWN;
6666                 break;
6667         }
6668
6669         desc->info.port_speed.speed = cpu_to_be16(rdp_speed);
6670
6671         if (phba->lmt & LMT_256Gb)
6672                 rdp_cap |= RDP_PS_256GB;
6673         if (phba->lmt & LMT_128Gb)
6674                 rdp_cap |= RDP_PS_128GB;
6675         if (phba->lmt & LMT_64Gb)
6676                 rdp_cap |= RDP_PS_64GB;
6677         if (phba->lmt & LMT_32Gb)
6678                 rdp_cap |= RDP_PS_32GB;
6679         if (phba->lmt & LMT_16Gb)
6680                 rdp_cap |= RDP_PS_16GB;
6681         if (phba->lmt & LMT_10Gb)
6682                 rdp_cap |= RDP_PS_10GB;
6683         if (phba->lmt & LMT_8Gb)
6684                 rdp_cap |= RDP_PS_8GB;
6685         if (phba->lmt & LMT_4Gb)
6686                 rdp_cap |= RDP_PS_4GB;
6687         if (phba->lmt & LMT_2Gb)
6688                 rdp_cap |= RDP_PS_2GB;
6689         if (phba->lmt & LMT_1Gb)
6690                 rdp_cap |= RDP_PS_1GB;
6691
6692         if (rdp_cap == 0)
6693                 rdp_cap = RDP_CAP_UNKNOWN;
6694         if (phba->cfg_link_speed != LPFC_USER_LINK_SPEED_AUTO)
6695                 rdp_cap |= RDP_CAP_USER_CONFIGURED;
6696
6697         desc->info.port_speed.capabilities = cpu_to_be16(rdp_cap);
6698         desc->length = cpu_to_be32(sizeof(desc->info));
6699         return sizeof(struct fc_rdp_port_speed_desc);
6700 }
6701
6702 static uint32_t
6703 lpfc_rdp_res_diag_port_names(struct fc_rdp_port_name_desc *desc,
6704                 struct lpfc_vport *vport)
6705 {
6706
6707         desc->tag = cpu_to_be32(RDP_PORT_NAMES_DESC_TAG);
6708
6709         memcpy(desc->port_names.wwnn, &vport->fc_nodename,
6710                         sizeof(desc->port_names.wwnn));
6711
6712         memcpy(desc->port_names.wwpn, &vport->fc_portname,
6713                         sizeof(desc->port_names.wwpn));
6714
6715         desc->length = cpu_to_be32(sizeof(desc->port_names));
6716         return sizeof(struct fc_rdp_port_name_desc);
6717 }
6718
6719 static uint32_t
6720 lpfc_rdp_res_attach_port_names(struct fc_rdp_port_name_desc *desc,
6721                 struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
6722 {
6723
6724         desc->tag = cpu_to_be32(RDP_PORT_NAMES_DESC_TAG);
6725         if (vport->fc_flag & FC_FABRIC) {
6726                 memcpy(desc->port_names.wwnn, &vport->fabric_nodename,
6727                        sizeof(desc->port_names.wwnn));
6728
6729                 memcpy(desc->port_names.wwpn, &vport->fabric_portname,
6730                        sizeof(desc->port_names.wwpn));
6731         } else {  /* Point to Point */
6732                 memcpy(desc->port_names.wwnn, &ndlp->nlp_nodename,
6733                        sizeof(desc->port_names.wwnn));
6734
6735                 memcpy(desc->port_names.wwpn, &ndlp->nlp_portname,
6736                        sizeof(desc->port_names.wwpn));
6737         }
6738
6739         desc->length = cpu_to_be32(sizeof(desc->port_names));
6740         return sizeof(struct fc_rdp_port_name_desc);
6741 }
6742
6743 static void
6744 lpfc_els_rdp_cmpl(struct lpfc_hba *phba, struct lpfc_rdp_context *rdp_context,
6745                 int status)
6746 {
6747         struct lpfc_nodelist *ndlp = rdp_context->ndlp;
6748         struct lpfc_vport *vport = ndlp->vport;
6749         struct lpfc_iocbq *elsiocb;
6750         struct ulp_bde64 *bpl;
6751         IOCB_t *icmd;
6752         uint8_t *pcmd;
6753         struct ls_rjt *stat;
6754         struct fc_rdp_res_frame *rdp_res;
6755         uint32_t cmdsize, len;
6756         uint16_t *flag_ptr;
6757         int rc;
6758
6759         if (status != SUCCESS)
6760                 goto error;
6761
6762         /* This will change once we know the true size of the RDP payload */
6763         cmdsize = sizeof(struct fc_rdp_res_frame);
6764
6765         elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize,
6766                         lpfc_max_els_tries, rdp_context->ndlp,
6767                         rdp_context->ndlp->nlp_DID, ELS_CMD_ACC);
6768         if (!elsiocb)
6769                 goto free_rdp_context;
6770
6771         icmd = &elsiocb->iocb;
6772         icmd->ulpContext = rdp_context->rx_id;
6773         icmd->unsli3.rcvsli3.ox_id = rdp_context->ox_id;
6774
6775         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
6776                         "2171 Xmit RDP response tag x%x xri x%x, "
6777                         "did x%x, nlp_flag x%x, nlp_state x%x, rpi x%x",
6778                         elsiocb->iotag, elsiocb->iocb.ulpContext,
6779                         ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
6780                         ndlp->nlp_rpi);
6781         rdp_res = (struct fc_rdp_res_frame *)
6782                 (((struct lpfc_dmabuf *) elsiocb->context2)->virt);
6783         pcmd = (uint8_t *) (((struct lpfc_dmabuf *) elsiocb->context2)->virt);
6784         memset(pcmd, 0, sizeof(struct fc_rdp_res_frame));
6785         *((uint32_t *) (pcmd)) = ELS_CMD_ACC;
6786
6787         /* Update Alarm and Warning */
6788         flag_ptr = (uint16_t *)(rdp_context->page_a2 + SSF_ALARM_FLAGS);
6789         phba->sfp_alarm |= *flag_ptr;
6790         flag_ptr = (uint16_t *)(rdp_context->page_a2 + SSF_WARNING_FLAGS);
6791         phba->sfp_warning |= *flag_ptr;
6792
6793         /* For RDP payload */
6794         len = 8;
6795         len += lpfc_rdp_res_link_service((struct fc_rdp_link_service_desc *)
6796                                          (len + pcmd), ELS_CMD_RDP);
6797
6798         len += lpfc_rdp_res_sfp_desc((struct fc_rdp_sfp_desc *)(len + pcmd),
6799                         rdp_context->page_a0, rdp_context->page_a2);
6800         len += lpfc_rdp_res_speed((struct fc_rdp_port_speed_desc *)(len + pcmd),
6801                                   phba);
6802         len += lpfc_rdp_res_link_error((struct fc_rdp_link_error_status_desc *)
6803                                        (len + pcmd), &rdp_context->link_stat);
6804         len += lpfc_rdp_res_diag_port_names((struct fc_rdp_port_name_desc *)
6805                                              (len + pcmd), vport);
6806         len += lpfc_rdp_res_attach_port_names((struct fc_rdp_port_name_desc *)
6807                                         (len + pcmd), vport, ndlp);
6808         len += lpfc_rdp_res_fec_desc((struct fc_fec_rdp_desc *)(len + pcmd),
6809                         &rdp_context->link_stat);
6810         len += lpfc_rdp_res_bbc_desc((struct fc_rdp_bbc_desc *)(len + pcmd),
6811                                      &rdp_context->link_stat, vport);
6812         len += lpfc_rdp_res_oed_temp_desc(phba,
6813                                 (struct fc_rdp_oed_sfp_desc *)(len + pcmd),
6814                                 rdp_context->page_a2);
6815         len += lpfc_rdp_res_oed_voltage_desc(phba,
6816                                 (struct fc_rdp_oed_sfp_desc *)(len + pcmd),
6817                                 rdp_context->page_a2);
6818         len += lpfc_rdp_res_oed_txbias_desc(phba,
6819                                 (struct fc_rdp_oed_sfp_desc *)(len + pcmd),
6820                                 rdp_context->page_a2);
6821         len += lpfc_rdp_res_oed_txpower_desc(phba,
6822                                 (struct fc_rdp_oed_sfp_desc *)(len + pcmd),
6823                                 rdp_context->page_a2);
6824         len += lpfc_rdp_res_oed_rxpower_desc(phba,
6825                                 (struct fc_rdp_oed_sfp_desc *)(len + pcmd),
6826                                 rdp_context->page_a2);
6827         len += lpfc_rdp_res_opd_desc((struct fc_rdp_opd_sfp_desc *)(len + pcmd),
6828                                      rdp_context->page_a0, vport);
6829
6830         rdp_res->length = cpu_to_be32(len - 8);
6831         elsiocb->iocb_cmpl = lpfc_cmpl_els_rsp;
6832
6833         /* Now that we know the true size of the payload, update the BPL */
6834         bpl = (struct ulp_bde64 *)
6835                 (((struct lpfc_dmabuf *)(elsiocb->context3))->virt);
6836         bpl->tus.f.bdeSize = len;
6837         bpl->tus.f.bdeFlags = 0;
6838         bpl->tus.w = le32_to_cpu(bpl->tus.w);
6839
6840         phba->fc_stat.elsXmitACC++;
6841         elsiocb->context1 = lpfc_nlp_get(ndlp);
6842         if (!elsiocb->context1) {
6843                 lpfc_els_free_iocb(phba, elsiocb);
6844                 goto free_rdp_context;
6845         }
6846
6847         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
6848         if (rc == IOCB_ERROR) {
6849                 lpfc_els_free_iocb(phba, elsiocb);
6850                 lpfc_nlp_put(ndlp);
6851         }
6852
6853         goto free_rdp_context;
6854
6855 error:
6856         cmdsize = 2 * sizeof(uint32_t);
6857         elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, lpfc_max_els_tries,
6858                         ndlp, ndlp->nlp_DID, ELS_CMD_LS_RJT);
6859         if (!elsiocb)
6860                 goto free_rdp_context;
6861
6862         icmd = &elsiocb->iocb;
6863         icmd->ulpContext = rdp_context->rx_id;
6864         icmd->unsli3.rcvsli3.ox_id = rdp_context->ox_id;
6865         pcmd = (uint8_t *) (((struct lpfc_dmabuf *) elsiocb->context2)->virt);
6866
6867         *((uint32_t *) (pcmd)) = ELS_CMD_LS_RJT;
6868         stat = (struct ls_rjt *)(pcmd + sizeof(uint32_t));
6869         stat->un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
6870
6871         phba->fc_stat.elsXmitLSRJT++;
6872         elsiocb->iocb_cmpl = lpfc_cmpl_els_rsp;
6873         elsiocb->context1 = lpfc_nlp_get(ndlp);
6874         if (!elsiocb->context1) {
6875                 lpfc_els_free_iocb(phba, elsiocb);
6876                 goto free_rdp_context;
6877         }
6878
6879         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
6880         if (rc == IOCB_ERROR) {
6881                 lpfc_els_free_iocb(phba, elsiocb);
6882                 lpfc_nlp_put(ndlp);
6883         }
6884
6885 free_rdp_context:
6886         /* This reference put is for the original unsolicited RDP. If the
6887          * iocb prep failed, there is no reference to remove.
6888          */
6889         lpfc_nlp_put(ndlp);
6890         kfree(rdp_context);
6891 }
6892
6893 static int
6894 lpfc_get_rdp_info(struct lpfc_hba *phba, struct lpfc_rdp_context *rdp_context)
6895 {
6896         LPFC_MBOXQ_t *mbox = NULL;
6897         struct lpfc_dmabuf *mp;
6898         int rc;
6899
6900         mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
6901         if (!mbox) {
6902                 lpfc_printf_log(phba, KERN_WARNING, LOG_MBOX | LOG_ELS,
6903                                 "7105 failed to allocate mailbox memory");
6904                 return 1;
6905         }
6906
6907         if (lpfc_sli4_dump_page_a0(phba, mbox))
6908                 goto prep_mbox_fail;
6909         mbox->vport = rdp_context->ndlp->vport;
6910         mbox->mbox_cmpl = lpfc_mbx_cmpl_rdp_page_a0;
6911         mbox->ctx_ndlp = (struct lpfc_rdp_context *)rdp_context;
6912         rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
6913         if (rc == MBX_NOT_FINISHED) {
6914                 mp = (struct lpfc_dmabuf *)mbox->ctx_buf;
6915                 lpfc_mbuf_free(phba, mp->virt, mp->phys);
6916                 goto issue_mbox_fail;
6917         }
6918
6919         return 0;
6920
6921 prep_mbox_fail:
6922 issue_mbox_fail:
6923         mempool_free(mbox, phba->mbox_mem_pool);
6924         return 1;
6925 }
6926
6927 /*
6928  * lpfc_els_rcv_rdp - Process an unsolicited RDP ELS.
6929  * @vport: pointer to a host virtual N_Port data structure.
6930  * @cmdiocb: pointer to lpfc command iocb data structure.
6931  * @ndlp: pointer to a node-list data structure.
6932  *
6933  * This routine processes an unsolicited RDP(Read Diagnostic Parameters)
6934  * IOCB. First, the payload of the unsolicited RDP is checked.
6935  * Then it will (1) send MBX_DUMP_MEMORY, Embedded DMP_LMSD sub command TYPE-3
6936  * for Page A0, (2) send MBX_DUMP_MEMORY, DMP_LMSD for Page A2,
6937  * (3) send MBX_READ_LNK_STAT to get link stat, (4) Call lpfc_els_rdp_cmpl
6938  * gather all data and send RDP response.
6939  *
6940  * Return code
6941  *   0 - Sent the acc response
6942  *   1 - Sent the reject response.
6943  */
6944 static int
6945 lpfc_els_rcv_rdp(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
6946                 struct lpfc_nodelist *ndlp)
6947 {
6948         struct lpfc_hba *phba = vport->phba;
6949         struct lpfc_dmabuf *pcmd;
6950         uint8_t rjt_err, rjt_expl = LSEXP_NOTHING_MORE;
6951         struct fc_rdp_req_frame *rdp_req;
6952         struct lpfc_rdp_context *rdp_context;
6953         IOCB_t *cmd = NULL;
6954         struct ls_rjt stat;
6955
6956         if (phba->sli_rev < LPFC_SLI_REV4 ||
6957             bf_get(lpfc_sli_intf_if_type, &phba->sli4_hba.sli_intf) <
6958                                                 LPFC_SLI_INTF_IF_TYPE_2) {
6959                 rjt_err = LSRJT_UNABLE_TPC;
6960                 rjt_expl = LSEXP_REQ_UNSUPPORTED;
6961                 goto error;
6962         }
6963
6964         if (phba->sli_rev < LPFC_SLI_REV4 || (phba->hba_flag & HBA_FCOE_MODE)) {
6965                 rjt_err = LSRJT_UNABLE_TPC;
6966                 rjt_expl = LSEXP_REQ_UNSUPPORTED;
6967                 goto error;
6968         }
6969
6970         pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
6971         rdp_req = (struct fc_rdp_req_frame *) pcmd->virt;
6972
6973         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
6974                          "2422 ELS RDP Request "
6975                          "dec len %d tag x%x port_id %d len %d\n",
6976                          be32_to_cpu(rdp_req->rdp_des_length),
6977                          be32_to_cpu(rdp_req->nport_id_desc.tag),
6978                          be32_to_cpu(rdp_req->nport_id_desc.nport_id),
6979                          be32_to_cpu(rdp_req->nport_id_desc.length));
6980
6981         if (sizeof(struct fc_rdp_nport_desc) !=
6982                         be32_to_cpu(rdp_req->rdp_des_length))
6983                 goto rjt_logerr;
6984         if (RDP_N_PORT_DESC_TAG != be32_to_cpu(rdp_req->nport_id_desc.tag))
6985                 goto rjt_logerr;
6986         if (RDP_NPORT_ID_SIZE !=
6987                         be32_to_cpu(rdp_req->nport_id_desc.length))
6988                 goto rjt_logerr;
6989         rdp_context = kzalloc(sizeof(struct lpfc_rdp_context), GFP_KERNEL);
6990         if (!rdp_context) {
6991                 rjt_err = LSRJT_UNABLE_TPC;
6992                 goto error;
6993         }
6994
6995         cmd = &cmdiocb->iocb;
6996         rdp_context->ndlp = lpfc_nlp_get(ndlp);
6997         if (!rdp_context->ndlp) {
6998                 kfree(rdp_context);
6999                 rjt_err = LSRJT_UNABLE_TPC;
7000                 goto error;
7001         }
7002         rdp_context->ox_id = cmd->unsli3.rcvsli3.ox_id;
7003         rdp_context->rx_id = cmd->ulpContext;
7004         rdp_context->cmpl = lpfc_els_rdp_cmpl;
7005         if (lpfc_get_rdp_info(phba, rdp_context)) {
7006                 lpfc_printf_vlog(ndlp->vport, KERN_WARNING, LOG_ELS,
7007                                  "2423 Unable to send mailbox");
7008                 kfree(rdp_context);
7009                 rjt_err = LSRJT_UNABLE_TPC;
7010                 lpfc_nlp_put(ndlp);
7011                 goto error;
7012         }
7013
7014         return 0;
7015
7016 rjt_logerr:
7017         rjt_err = LSRJT_LOGICAL_ERR;
7018
7019 error:
7020         memset(&stat, 0, sizeof(stat));
7021         stat.un.b.lsRjtRsnCode = rjt_err;
7022         stat.un.b.lsRjtRsnCodeExp = rjt_expl;
7023         lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
7024         return 1;
7025 }
7026
7027
7028 static void
7029 lpfc_els_lcb_rsp(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
7030 {
7031         MAILBOX_t *mb;
7032         IOCB_t *icmd;
7033         uint8_t *pcmd;
7034         struct lpfc_iocbq *elsiocb;
7035         struct lpfc_nodelist *ndlp;
7036         struct ls_rjt *stat;
7037         union lpfc_sli4_cfg_shdr *shdr;
7038         struct lpfc_lcb_context *lcb_context;
7039         struct fc_lcb_res_frame *lcb_res;
7040         uint32_t cmdsize, shdr_status, shdr_add_status;
7041         int rc;
7042
7043         mb = &pmb->u.mb;
7044         lcb_context = (struct lpfc_lcb_context *)pmb->ctx_ndlp;
7045         ndlp = lcb_context->ndlp;
7046         pmb->ctx_ndlp = NULL;
7047         pmb->ctx_buf = NULL;
7048
7049         shdr = (union lpfc_sli4_cfg_shdr *)
7050                         &pmb->u.mqe.un.beacon_config.header.cfg_shdr;
7051         shdr_status = bf_get(lpfc_mbox_hdr_status, &shdr->response);
7052         shdr_add_status = bf_get(lpfc_mbox_hdr_add_status, &shdr->response);
7053
7054         lpfc_printf_log(phba, KERN_INFO, LOG_MBOX,
7055                                 "0194 SET_BEACON_CONFIG mailbox "
7056                                 "completed with status x%x add_status x%x,"
7057                                 " mbx status x%x\n",
7058                                 shdr_status, shdr_add_status, mb->mbxStatus);
7059
7060         if ((mb->mbxStatus != MBX_SUCCESS) || shdr_status ||
7061             (shdr_add_status == ADD_STATUS_OPERATION_ALREADY_ACTIVE) ||
7062             (shdr_add_status == ADD_STATUS_INVALID_REQUEST)) {
7063                 mempool_free(pmb, phba->mbox_mem_pool);
7064                 goto error;
7065         }
7066
7067         mempool_free(pmb, phba->mbox_mem_pool);
7068         cmdsize = sizeof(struct fc_lcb_res_frame);
7069         elsiocb = lpfc_prep_els_iocb(phba->pport, 0, cmdsize,
7070                         lpfc_max_els_tries, ndlp,
7071                         ndlp->nlp_DID, ELS_CMD_ACC);
7072
7073         /* Decrement the ndlp reference count from previous mbox command */
7074         lpfc_nlp_put(ndlp);
7075
7076         if (!elsiocb)
7077                 goto free_lcb_context;
7078
7079         lcb_res = (struct fc_lcb_res_frame *)
7080                 (((struct lpfc_dmabuf *)elsiocb->context2)->virt);
7081
7082         memset(lcb_res, 0, sizeof(struct fc_lcb_res_frame));
7083         icmd = &elsiocb->iocb;
7084         icmd->ulpContext = lcb_context->rx_id;
7085         icmd->unsli3.rcvsli3.ox_id = lcb_context->ox_id;
7086
7087         pcmd = (uint8_t *)(((struct lpfc_dmabuf *)elsiocb->context2)->virt);
7088         *((uint32_t *)(pcmd)) = ELS_CMD_ACC;
7089         lcb_res->lcb_sub_command = lcb_context->sub_command;
7090         lcb_res->lcb_type = lcb_context->type;
7091         lcb_res->capability = lcb_context->capability;
7092         lcb_res->lcb_frequency = lcb_context->frequency;
7093         lcb_res->lcb_duration = lcb_context->duration;
7094         elsiocb->iocb_cmpl = lpfc_cmpl_els_rsp;
7095         phba->fc_stat.elsXmitACC++;
7096
7097         elsiocb->context1 = lpfc_nlp_get(ndlp);
7098         if (!elsiocb->context1) {
7099                 lpfc_els_free_iocb(phba, elsiocb);
7100                 goto out;
7101         }
7102
7103         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
7104         if (rc == IOCB_ERROR) {
7105                 lpfc_els_free_iocb(phba, elsiocb);
7106                 lpfc_nlp_put(ndlp);
7107         }
7108  out:
7109         kfree(lcb_context);
7110         return;
7111
7112 error:
7113         cmdsize = sizeof(struct fc_lcb_res_frame);
7114         elsiocb = lpfc_prep_els_iocb(phba->pport, 0, cmdsize,
7115                         lpfc_max_els_tries, ndlp,
7116                         ndlp->nlp_DID, ELS_CMD_LS_RJT);
7117         lpfc_nlp_put(ndlp);
7118         if (!elsiocb)
7119                 goto free_lcb_context;
7120
7121         icmd = &elsiocb->iocb;
7122         icmd->ulpContext = lcb_context->rx_id;
7123         icmd->unsli3.rcvsli3.ox_id = lcb_context->ox_id;
7124         pcmd = (uint8_t *)(((struct lpfc_dmabuf *)elsiocb->context2)->virt);
7125
7126         *((uint32_t *)(pcmd)) = ELS_CMD_LS_RJT;
7127         stat = (struct ls_rjt *)(pcmd + sizeof(uint32_t));
7128         stat->un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
7129
7130         if (shdr_add_status == ADD_STATUS_OPERATION_ALREADY_ACTIVE)
7131                 stat->un.b.lsRjtRsnCodeExp = LSEXP_CMD_IN_PROGRESS;
7132
7133         elsiocb->iocb_cmpl = lpfc_cmpl_els_rsp;
7134         phba->fc_stat.elsXmitLSRJT++;
7135         elsiocb->context1 = lpfc_nlp_get(ndlp);
7136         if (!elsiocb->context1) {
7137                 lpfc_els_free_iocb(phba, elsiocb);
7138                 goto free_lcb_context;
7139         }
7140
7141         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
7142         if (rc == IOCB_ERROR) {
7143                 lpfc_els_free_iocb(phba, elsiocb);
7144                 lpfc_nlp_put(ndlp);
7145         }
7146 free_lcb_context:
7147         kfree(lcb_context);
7148 }
7149
7150 static int
7151 lpfc_sli4_set_beacon(struct lpfc_vport *vport,
7152                      struct lpfc_lcb_context *lcb_context,
7153                      uint32_t beacon_state)
7154 {
7155         struct lpfc_hba *phba = vport->phba;
7156         union lpfc_sli4_cfg_shdr *cfg_shdr;
7157         LPFC_MBOXQ_t *mbox = NULL;
7158         uint32_t len;
7159         int rc;
7160
7161         mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
7162         if (!mbox)
7163                 return 1;
7164
7165         cfg_shdr = &mbox->u.mqe.un.sli4_config.header.cfg_shdr;
7166         len = sizeof(struct lpfc_mbx_set_beacon_config) -
7167                 sizeof(struct lpfc_sli4_cfg_mhdr);
7168         lpfc_sli4_config(phba, mbox, LPFC_MBOX_SUBSYSTEM_COMMON,
7169                          LPFC_MBOX_OPCODE_SET_BEACON_CONFIG, len,
7170                          LPFC_SLI4_MBX_EMBED);
7171         mbox->ctx_ndlp = (void *)lcb_context;
7172         mbox->vport = phba->pport;
7173         mbox->mbox_cmpl = lpfc_els_lcb_rsp;
7174         bf_set(lpfc_mbx_set_beacon_port_num, &mbox->u.mqe.un.beacon_config,
7175                phba->sli4_hba.physical_port);
7176         bf_set(lpfc_mbx_set_beacon_state, &mbox->u.mqe.un.beacon_config,
7177                beacon_state);
7178         mbox->u.mqe.un.beacon_config.word5 = 0;         /* Reserved */
7179
7180         /*
7181          *      Check bv1s bit before issuing the mailbox
7182          *      if bv1s == 1, LCB V1 supported
7183          *      else, LCB V0 supported
7184          */
7185
7186         if (phba->sli4_hba.pc_sli4_params.bv1s) {
7187                 /* COMMON_SET_BEACON_CONFIG_V1 */
7188                 cfg_shdr->request.word9 = BEACON_VERSION_V1;
7189                 lcb_context->capability |= LCB_CAPABILITY_DURATION;
7190                 bf_set(lpfc_mbx_set_beacon_port_type,
7191                        &mbox->u.mqe.un.beacon_config, 0);
7192                 bf_set(lpfc_mbx_set_beacon_duration_v1,
7193                        &mbox->u.mqe.un.beacon_config,
7194                        be16_to_cpu(lcb_context->duration));
7195         } else {
7196                 /* COMMON_SET_BEACON_CONFIG_V0 */
7197                 if (be16_to_cpu(lcb_context->duration) != 0) {
7198                         mempool_free(mbox, phba->mbox_mem_pool);
7199                         return 1;
7200                 }
7201                 cfg_shdr->request.word9 = BEACON_VERSION_V0;
7202                 lcb_context->capability &=  ~(LCB_CAPABILITY_DURATION);
7203                 bf_set(lpfc_mbx_set_beacon_state,
7204                        &mbox->u.mqe.un.beacon_config, beacon_state);
7205                 bf_set(lpfc_mbx_set_beacon_port_type,
7206                        &mbox->u.mqe.un.beacon_config, 1);
7207                 bf_set(lpfc_mbx_set_beacon_duration,
7208                        &mbox->u.mqe.un.beacon_config,
7209                        be16_to_cpu(lcb_context->duration));
7210         }
7211
7212         rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
7213         if (rc == MBX_NOT_FINISHED) {
7214                 mempool_free(mbox, phba->mbox_mem_pool);
7215                 return 1;
7216         }
7217
7218         return 0;
7219 }
7220
7221
7222 /**
7223  * lpfc_els_rcv_lcb - Process an unsolicited LCB
7224  * @vport: pointer to a host virtual N_Port data structure.
7225  * @cmdiocb: pointer to lpfc command iocb data structure.
7226  * @ndlp: pointer to a node-list data structure.
7227  *
7228  * This routine processes an unsolicited LCB(LINK CABLE BEACON) IOCB.
7229  * First, the payload of the unsolicited LCB is checked.
7230  * Then based on Subcommand beacon will either turn on or off.
7231  *
7232  * Return code
7233  * 0 - Sent the acc response
7234  * 1 - Sent the reject response.
7235  **/
7236 static int
7237 lpfc_els_rcv_lcb(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
7238                  struct lpfc_nodelist *ndlp)
7239 {
7240         struct lpfc_hba *phba = vport->phba;
7241         struct lpfc_dmabuf *pcmd;
7242         uint8_t *lp;
7243         struct fc_lcb_request_frame *beacon;
7244         struct lpfc_lcb_context *lcb_context;
7245         u8 state, rjt_err = 0;
7246         struct ls_rjt stat;
7247
7248         pcmd = (struct lpfc_dmabuf *)cmdiocb->context2;
7249         lp = (uint8_t *)pcmd->virt;
7250         beacon = (struct fc_lcb_request_frame *)pcmd->virt;
7251
7252         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
7253                         "0192 ELS LCB Data x%x x%x x%x x%x sub x%x "
7254                         "type x%x frequency %x duration x%x\n",
7255                         lp[0], lp[1], lp[2],
7256                         beacon->lcb_command,
7257                         beacon->lcb_sub_command,
7258                         beacon->lcb_type,
7259                         beacon->lcb_frequency,
7260                         be16_to_cpu(beacon->lcb_duration));
7261
7262         if (beacon->lcb_sub_command != LPFC_LCB_ON &&
7263             beacon->lcb_sub_command != LPFC_LCB_OFF) {
7264                 rjt_err = LSRJT_CMD_UNSUPPORTED;
7265                 goto rjt;
7266         }
7267
7268         if (phba->sli_rev < LPFC_SLI_REV4  ||
7269             phba->hba_flag & HBA_FCOE_MODE ||
7270             (bf_get(lpfc_sli_intf_if_type, &phba->sli4_hba.sli_intf) <
7271             LPFC_SLI_INTF_IF_TYPE_2)) {
7272                 rjt_err = LSRJT_CMD_UNSUPPORTED;
7273                 goto rjt;
7274         }
7275
7276         lcb_context = kmalloc(sizeof(*lcb_context), GFP_KERNEL);
7277         if (!lcb_context) {
7278                 rjt_err = LSRJT_UNABLE_TPC;
7279                 goto rjt;
7280         }
7281
7282         state = (beacon->lcb_sub_command == LPFC_LCB_ON) ? 1 : 0;
7283         lcb_context->sub_command = beacon->lcb_sub_command;
7284         lcb_context->capability = 0;
7285         lcb_context->type = beacon->lcb_type;
7286         lcb_context->frequency = beacon->lcb_frequency;
7287         lcb_context->duration = beacon->lcb_duration;
7288         lcb_context->ox_id = cmdiocb->iocb.unsli3.rcvsli3.ox_id;
7289         lcb_context->rx_id = cmdiocb->iocb.ulpContext;
7290         lcb_context->ndlp = lpfc_nlp_get(ndlp);
7291         if (!lcb_context->ndlp) {
7292                 rjt_err = LSRJT_UNABLE_TPC;
7293                 goto rjt_free;
7294         }
7295
7296         if (lpfc_sli4_set_beacon(vport, lcb_context, state)) {
7297                 lpfc_printf_vlog(ndlp->vport, KERN_ERR, LOG_TRACE_EVENT,
7298                                  "0193 failed to send mail box");
7299                 lpfc_nlp_put(ndlp);
7300                 rjt_err = LSRJT_UNABLE_TPC;
7301                 goto rjt_free;
7302         }
7303         return 0;
7304
7305 rjt_free:
7306         kfree(lcb_context);
7307 rjt:
7308         memset(&stat, 0, sizeof(stat));
7309         stat.un.b.lsRjtRsnCode = rjt_err;
7310         lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
7311         return 1;
7312 }
7313
7314
7315 /**
7316  * lpfc_els_flush_rscn - Clean up any rscn activities with a vport
7317  * @vport: pointer to a host virtual N_Port data structure.
7318  *
7319  * This routine cleans up any Registration State Change Notification
7320  * (RSCN) activity with a @vport. Note that the fc_rscn_flush flag of the
7321  * @vport together with the host_lock is used to prevent multiple thread
7322  * trying to access the RSCN array on a same @vport at the same time.
7323  **/
7324 void
7325 lpfc_els_flush_rscn(struct lpfc_vport *vport)
7326 {
7327         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
7328         struct lpfc_hba  *phba = vport->phba;
7329         int i;
7330
7331         spin_lock_irq(shost->host_lock);
7332         if (vport->fc_rscn_flush) {
7333                 /* Another thread is walking fc_rscn_id_list on this vport */
7334                 spin_unlock_irq(shost->host_lock);
7335                 return;
7336         }
7337         /* Indicate we are walking lpfc_els_flush_rscn on this vport */
7338         vport->fc_rscn_flush = 1;
7339         spin_unlock_irq(shost->host_lock);
7340
7341         for (i = 0; i < vport->fc_rscn_id_cnt; i++) {
7342                 lpfc_in_buf_free(phba, vport->fc_rscn_id_list[i]);
7343                 vport->fc_rscn_id_list[i] = NULL;
7344         }
7345         spin_lock_irq(shost->host_lock);
7346         vport->fc_rscn_id_cnt = 0;
7347         vport->fc_flag &= ~(FC_RSCN_MODE | FC_RSCN_DISCOVERY);
7348         spin_unlock_irq(shost->host_lock);
7349         lpfc_can_disctmo(vport);
7350         /* Indicate we are done walking this fc_rscn_id_list */
7351         vport->fc_rscn_flush = 0;
7352 }
7353
7354 /**
7355  * lpfc_rscn_payload_check - Check whether there is a pending rscn to a did
7356  * @vport: pointer to a host virtual N_Port data structure.
7357  * @did: remote destination port identifier.
7358  *
7359  * This routine checks whether there is any pending Registration State
7360  * Configuration Notification (RSCN) to a @did on @vport.
7361  *
7362  * Return code
7363  *   None zero - The @did matched with a pending rscn
7364  *   0 - not able to match @did with a pending rscn
7365  **/
7366 int
7367 lpfc_rscn_payload_check(struct lpfc_vport *vport, uint32_t did)
7368 {
7369         D_ID ns_did;
7370         D_ID rscn_did;
7371         uint32_t *lp;
7372         uint32_t payload_len, i;
7373         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
7374
7375         ns_did.un.word = did;
7376
7377         /* Never match fabric nodes for RSCNs */
7378         if ((did & Fabric_DID_MASK) == Fabric_DID_MASK)
7379                 return 0;
7380
7381         /* If we are doing a FULL RSCN rediscovery, match everything */
7382         if (vport->fc_flag & FC_RSCN_DISCOVERY)
7383                 return did;
7384
7385         spin_lock_irq(shost->host_lock);
7386         if (vport->fc_rscn_flush) {
7387                 /* Another thread is walking fc_rscn_id_list on this vport */
7388                 spin_unlock_irq(shost->host_lock);
7389                 return 0;
7390         }
7391         /* Indicate we are walking fc_rscn_id_list on this vport */
7392         vport->fc_rscn_flush = 1;
7393         spin_unlock_irq(shost->host_lock);
7394         for (i = 0; i < vport->fc_rscn_id_cnt; i++) {
7395                 lp = vport->fc_rscn_id_list[i]->virt;
7396                 payload_len = be32_to_cpu(*lp++ & ~ELS_CMD_MASK);
7397                 payload_len -= sizeof(uint32_t);        /* take off word 0 */
7398                 while (payload_len) {
7399                         rscn_did.un.word = be32_to_cpu(*lp++);
7400                         payload_len -= sizeof(uint32_t);
7401                         switch (rscn_did.un.b.resv & RSCN_ADDRESS_FORMAT_MASK) {
7402                         case RSCN_ADDRESS_FORMAT_PORT:
7403                                 if ((ns_did.un.b.domain == rscn_did.un.b.domain)
7404                                     && (ns_did.un.b.area == rscn_did.un.b.area)
7405                                     && (ns_did.un.b.id == rscn_did.un.b.id))
7406                                         goto return_did_out;
7407                                 break;
7408                         case RSCN_ADDRESS_FORMAT_AREA:
7409                                 if ((ns_did.un.b.domain == rscn_did.un.b.domain)
7410                                     && (ns_did.un.b.area == rscn_did.un.b.area))
7411                                         goto return_did_out;
7412                                 break;
7413                         case RSCN_ADDRESS_FORMAT_DOMAIN:
7414                                 if (ns_did.un.b.domain == rscn_did.un.b.domain)
7415                                         goto return_did_out;
7416                                 break;
7417                         case RSCN_ADDRESS_FORMAT_FABRIC:
7418                                 goto return_did_out;
7419                         }
7420                 }
7421         }
7422         /* Indicate we are done with walking fc_rscn_id_list on this vport */
7423         vport->fc_rscn_flush = 0;
7424         return 0;
7425 return_did_out:
7426         /* Indicate we are done with walking fc_rscn_id_list on this vport */
7427         vport->fc_rscn_flush = 0;
7428         return did;
7429 }
7430
7431 /**
7432  * lpfc_rscn_recovery_check - Send recovery event to vport nodes matching rscn
7433  * @vport: pointer to a host virtual N_Port data structure.
7434  *
7435  * This routine sends recovery (NLP_EVT_DEVICE_RECOVERY) event to the
7436  * state machine for a @vport's nodes that are with pending RSCN (Registration
7437  * State Change Notification).
7438  *
7439  * Return code
7440  *   0 - Successful (currently alway return 0)
7441  **/
7442 static int
7443 lpfc_rscn_recovery_check(struct lpfc_vport *vport)
7444 {
7445         struct lpfc_nodelist *ndlp = NULL;
7446
7447         /* Move all affected nodes by pending RSCNs to NPR state. */
7448         list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
7449                 if ((ndlp->nlp_state == NLP_STE_UNUSED_NODE) ||
7450                     !lpfc_rscn_payload_check(vport, ndlp->nlp_DID))
7451                         continue;
7452
7453                 /* NVME Target mode does not do RSCN Recovery. */
7454                 if (vport->phba->nvmet_support)
7455                         continue;
7456
7457                 /* If we are in the process of doing discovery on this
7458                  * NPort, let it continue on its own.
7459                  */
7460                 switch (ndlp->nlp_state) {
7461                 case  NLP_STE_PLOGI_ISSUE:
7462                 case  NLP_STE_ADISC_ISSUE:
7463                 case  NLP_STE_REG_LOGIN_ISSUE:
7464                 case  NLP_STE_PRLI_ISSUE:
7465                 case  NLP_STE_LOGO_ISSUE:
7466                         continue;
7467                 }
7468
7469                 lpfc_disc_state_machine(vport, ndlp, NULL,
7470                                         NLP_EVT_DEVICE_RECOVERY);
7471                 lpfc_cancel_retry_delay_tmo(vport, ndlp);
7472         }
7473         return 0;
7474 }
7475
7476 /**
7477  * lpfc_send_rscn_event - Send an RSCN event to management application
7478  * @vport: pointer to a host virtual N_Port data structure.
7479  * @cmdiocb: pointer to lpfc command iocb data structure.
7480  *
7481  * lpfc_send_rscn_event sends an RSCN netlink event to management
7482  * applications.
7483  */
7484 static void
7485 lpfc_send_rscn_event(struct lpfc_vport *vport,
7486                 struct lpfc_iocbq *cmdiocb)
7487 {
7488         struct lpfc_dmabuf *pcmd;
7489         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
7490         uint32_t *payload_ptr;
7491         uint32_t payload_len;
7492         struct lpfc_rscn_event_header *rscn_event_data;
7493
7494         pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
7495         payload_ptr = (uint32_t *) pcmd->virt;
7496         payload_len = be32_to_cpu(*payload_ptr & ~ELS_CMD_MASK);
7497
7498         rscn_event_data = kmalloc(sizeof(struct lpfc_rscn_event_header) +
7499                 payload_len, GFP_KERNEL);
7500         if (!rscn_event_data) {
7501                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
7502                         "0147 Failed to allocate memory for RSCN event\n");
7503                 return;
7504         }
7505         rscn_event_data->event_type = FC_REG_RSCN_EVENT;
7506         rscn_event_data->payload_length = payload_len;
7507         memcpy(rscn_event_data->rscn_payload, payload_ptr,
7508                 payload_len);
7509
7510         fc_host_post_vendor_event(shost,
7511                 fc_get_event_number(),
7512                 sizeof(struct lpfc_rscn_event_header) + payload_len,
7513                 (char *)rscn_event_data,
7514                 LPFC_NL_VENDOR_ID);
7515
7516         kfree(rscn_event_data);
7517 }
7518
7519 /**
7520  * lpfc_els_rcv_rscn - Process an unsolicited rscn iocb
7521  * @vport: pointer to a host virtual N_Port data structure.
7522  * @cmdiocb: pointer to lpfc command iocb data structure.
7523  * @ndlp: pointer to a node-list data structure.
7524  *
7525  * This routine processes an unsolicited RSCN (Registration State Change
7526  * Notification) IOCB. First, the payload of the unsolicited RSCN is walked
7527  * to invoke fc_host_post_event() routine to the FC transport layer. If the
7528  * discover state machine is about to begin discovery, it just accepts the
7529  * RSCN and the discovery process will satisfy the RSCN. If this RSCN only
7530  * contains N_Port IDs for other vports on this HBA, it just accepts the
7531  * RSCN and ignore processing it. If the state machine is in the recovery
7532  * state, the fc_rscn_id_list of this @vport is walked and the
7533  * lpfc_rscn_recovery_check() routine is invoked to send recovery event for
7534  * all nodes that match RSCN payload. Otherwise, the lpfc_els_handle_rscn()
7535  * routine is invoked to handle the RSCN event.
7536  *
7537  * Return code
7538  *   0 - Just sent the acc response
7539  *   1 - Sent the acc response and waited for name server completion
7540  **/
7541 static int
7542 lpfc_els_rcv_rscn(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
7543                   struct lpfc_nodelist *ndlp)
7544 {
7545         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
7546         struct lpfc_hba  *phba = vport->phba;
7547         struct lpfc_dmabuf *pcmd;
7548         uint32_t *lp, *datap;
7549         uint32_t payload_len, length, nportid, *cmd;
7550         int rscn_cnt;
7551         int rscn_id = 0, hba_id = 0;
7552         int i, tmo;
7553
7554         pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
7555         lp = (uint32_t *) pcmd->virt;
7556
7557         payload_len = be32_to_cpu(*lp++ & ~ELS_CMD_MASK);
7558         payload_len -= sizeof(uint32_t);        /* take off word 0 */
7559         /* RSCN received */
7560         lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
7561                          "0214 RSCN received Data: x%x x%x x%x x%x\n",
7562                          vport->fc_flag, payload_len, *lp,
7563                          vport->fc_rscn_id_cnt);
7564
7565         /* Send an RSCN event to the management application */
7566         lpfc_send_rscn_event(vport, cmdiocb);
7567
7568         for (i = 0; i < payload_len/sizeof(uint32_t); i++)
7569                 fc_host_post_event(shost, fc_get_event_number(),
7570                         FCH_EVT_RSCN, lp[i]);
7571
7572         /* Check if RSCN is coming from a direct-connected remote NPort */
7573         if (vport->fc_flag & FC_PT2PT) {
7574                 /* If so, just ACC it, no other action needed for now */
7575                 lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
7576                                  "2024 pt2pt RSCN %08x Data: x%x x%x\n",
7577                                  *lp, vport->fc_flag, payload_len);
7578                 lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
7579
7580                 /* Check to see if we need to NVME rescan this target
7581                  * remoteport.
7582                  */
7583                 if (ndlp->nlp_fc4_type & NLP_FC4_NVME &&
7584                     ndlp->nlp_type & (NLP_NVME_TARGET | NLP_NVME_DISCOVERY))
7585                         lpfc_nvme_rescan_port(vport, ndlp);
7586                 return 0;
7587         }
7588
7589         /* If we are about to begin discovery, just ACC the RSCN.
7590          * Discovery processing will satisfy it.
7591          */
7592         if (vport->port_state <= LPFC_NS_QRY) {
7593                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
7594                         "RCV RSCN ignore: did:x%x/ste:x%x flg:x%x",
7595                         ndlp->nlp_DID, vport->port_state, ndlp->nlp_flag);
7596
7597                 lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
7598                 return 0;
7599         }
7600
7601         /* If this RSCN just contains NPortIDs for other vports on this HBA,
7602          * just ACC and ignore it.
7603          */
7604         if ((phba->sli3_options & LPFC_SLI3_NPIV_ENABLED) &&
7605                 !(vport->cfg_peer_port_login)) {
7606                 i = payload_len;
7607                 datap = lp;
7608                 while (i > 0) {
7609                         nportid = *datap++;
7610                         nportid = ((be32_to_cpu(nportid)) & Mask_DID);
7611                         i -= sizeof(uint32_t);
7612                         rscn_id++;
7613                         if (lpfc_find_vport_by_did(phba, nportid))
7614                                 hba_id++;
7615                 }
7616                 if (rscn_id == hba_id) {
7617                         /* ALL NPortIDs in RSCN are on HBA */
7618                         lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
7619                                          "0219 Ignore RSCN "
7620                                          "Data: x%x x%x x%x x%x\n",
7621                                          vport->fc_flag, payload_len,
7622                                          *lp, vport->fc_rscn_id_cnt);
7623                         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
7624                                 "RCV RSCN vport:  did:x%x/ste:x%x flg:x%x",
7625                                 ndlp->nlp_DID, vport->port_state,
7626                                 ndlp->nlp_flag);
7627
7628                         lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb,
7629                                 ndlp, NULL);
7630                         return 0;
7631                 }
7632         }
7633
7634         spin_lock_irq(shost->host_lock);
7635         if (vport->fc_rscn_flush) {
7636                 /* Another thread is walking fc_rscn_id_list on this vport */
7637                 vport->fc_flag |= FC_RSCN_DISCOVERY;
7638                 spin_unlock_irq(shost->host_lock);
7639                 /* Send back ACC */
7640                 lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
7641                 return 0;
7642         }
7643         /* Indicate we are walking fc_rscn_id_list on this vport */
7644         vport->fc_rscn_flush = 1;
7645         spin_unlock_irq(shost->host_lock);
7646         /* Get the array count after successfully have the token */
7647         rscn_cnt = vport->fc_rscn_id_cnt;
7648         /* If we are already processing an RSCN, save the received
7649          * RSCN payload buffer, cmdiocb->context2 to process later.
7650          */
7651         if (vport->fc_flag & (FC_RSCN_MODE | FC_NDISC_ACTIVE)) {
7652                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
7653                         "RCV RSCN defer:  did:x%x/ste:x%x flg:x%x",
7654                         ndlp->nlp_DID, vport->port_state, ndlp->nlp_flag);
7655
7656                 spin_lock_irq(shost->host_lock);
7657                 vport->fc_flag |= FC_RSCN_DEFERRED;
7658
7659                 /* Restart disctmo if its already running */
7660                 if (vport->fc_flag & FC_DISC_TMO) {
7661                         tmo = ((phba->fc_ratov * 3) + 3);
7662                         mod_timer(&vport->fc_disctmo,
7663                                   jiffies + msecs_to_jiffies(1000 * tmo));
7664                 }
7665                 if ((rscn_cnt < FC_MAX_HOLD_RSCN) &&
7666                     !(vport->fc_flag & FC_RSCN_DISCOVERY)) {
7667                         vport->fc_flag |= FC_RSCN_MODE;
7668                         spin_unlock_irq(shost->host_lock);
7669                         if (rscn_cnt) {
7670                                 cmd = vport->fc_rscn_id_list[rscn_cnt-1]->virt;
7671                                 length = be32_to_cpu(*cmd & ~ELS_CMD_MASK);
7672                         }
7673                         if ((rscn_cnt) &&
7674                             (payload_len + length <= LPFC_BPL_SIZE)) {
7675                                 *cmd &= ELS_CMD_MASK;
7676                                 *cmd |= cpu_to_be32(payload_len + length);
7677                                 memcpy(((uint8_t *)cmd) + length, lp,
7678                                        payload_len);
7679                         } else {
7680                                 vport->fc_rscn_id_list[rscn_cnt] = pcmd;
7681                                 vport->fc_rscn_id_cnt++;
7682                                 /* If we zero, cmdiocb->context2, the calling
7683                                  * routine will not try to free it.
7684                                  */
7685                                 cmdiocb->context2 = NULL;
7686                         }
7687                         /* Deferred RSCN */
7688                         lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
7689                                          "0235 Deferred RSCN "
7690                                          "Data: x%x x%x x%x\n",
7691                                          vport->fc_rscn_id_cnt, vport->fc_flag,
7692                                          vport->port_state);
7693                 } else {
7694                         vport->fc_flag |= FC_RSCN_DISCOVERY;
7695                         spin_unlock_irq(shost->host_lock);
7696                         /* ReDiscovery RSCN */
7697                         lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
7698                                          "0234 ReDiscovery RSCN "
7699                                          "Data: x%x x%x x%x\n",
7700                                          vport->fc_rscn_id_cnt, vport->fc_flag,
7701                                          vport->port_state);
7702                 }
7703                 /* Indicate we are done walking fc_rscn_id_list on this vport */
7704                 vport->fc_rscn_flush = 0;
7705                 /* Send back ACC */
7706                 lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
7707                 /* send RECOVERY event for ALL nodes that match RSCN payload */
7708                 lpfc_rscn_recovery_check(vport);
7709                 return 0;
7710         }
7711         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
7712                 "RCV RSCN:        did:x%x/ste:x%x flg:x%x",
7713                 ndlp->nlp_DID, vport->port_state, ndlp->nlp_flag);
7714
7715         spin_lock_irq(shost->host_lock);
7716         vport->fc_flag |= FC_RSCN_MODE;
7717         spin_unlock_irq(shost->host_lock);
7718         vport->fc_rscn_id_list[vport->fc_rscn_id_cnt++] = pcmd;
7719         /* Indicate we are done walking fc_rscn_id_list on this vport */
7720         vport->fc_rscn_flush = 0;
7721         /*
7722          * If we zero, cmdiocb->context2, the calling routine will
7723          * not try to free it.
7724          */
7725         cmdiocb->context2 = NULL;
7726         lpfc_set_disctmo(vport);
7727         /* Send back ACC */
7728         lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
7729         /* send RECOVERY event for ALL nodes that match RSCN payload */
7730         lpfc_rscn_recovery_check(vport);
7731         return lpfc_els_handle_rscn(vport);
7732 }
7733
7734 /**
7735  * lpfc_els_handle_rscn - Handle rscn for a vport
7736  * @vport: pointer to a host virtual N_Port data structure.
7737  *
7738  * This routine handles the Registration State Configuration Notification
7739  * (RSCN) for a @vport. If login to NameServer does not exist, a new ndlp shall
7740  * be created and a Port Login (PLOGI) to the NameServer is issued. Otherwise,
7741  * if the ndlp to NameServer exists, a Common Transport (CT) command to the
7742  * NameServer shall be issued. If CT command to the NameServer fails to be
7743  * issued, the lpfc_els_flush_rscn() routine shall be invoked to clean up any
7744  * RSCN activities with the @vport.
7745  *
7746  * Return code
7747  *   0 - Cleaned up rscn on the @vport
7748  *   1 - Wait for plogi to name server before proceed
7749  **/
7750 int
7751 lpfc_els_handle_rscn(struct lpfc_vport *vport)
7752 {
7753         struct lpfc_nodelist *ndlp;
7754         struct lpfc_hba  *phba = vport->phba;
7755
7756         /* Ignore RSCN if the port is being torn down. */
7757         if (vport->load_flag & FC_UNLOADING) {
7758                 lpfc_els_flush_rscn(vport);
7759                 return 0;
7760         }
7761
7762         /* Start timer for RSCN processing */
7763         lpfc_set_disctmo(vport);
7764
7765         /* RSCN processed */
7766         lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
7767                          "0215 RSCN processed Data: x%x x%x x%x x%x x%x x%x\n",
7768                          vport->fc_flag, 0, vport->fc_rscn_id_cnt,
7769                          vport->port_state, vport->num_disc_nodes,
7770                          vport->gidft_inp);
7771
7772         /* To process RSCN, first compare RSCN data with NameServer */
7773         vport->fc_ns_retry = 0;
7774         vport->num_disc_nodes = 0;
7775
7776         ndlp = lpfc_findnode_did(vport, NameServer_DID);
7777         if (ndlp && ndlp->nlp_state == NLP_STE_UNMAPPED_NODE) {
7778                 /* Good ndlp, issue CT Request to NameServer.  Need to
7779                  * know how many gidfts were issued.  If none, then just
7780                  * flush the RSCN.  Otherwise, the outstanding requests
7781                  * need to complete.
7782                  */
7783                 if (phba->cfg_ns_query == LPFC_NS_QUERY_GID_FT) {
7784                         if (lpfc_issue_gidft(vport) > 0)
7785                                 return 1;
7786                 } else if (phba->cfg_ns_query == LPFC_NS_QUERY_GID_PT) {
7787                         if (lpfc_issue_gidpt(vport) > 0)
7788                                 return 1;
7789                 } else {
7790                         return 1;
7791                 }
7792         } else {
7793                 /* Nameserver login in question.  Revalidate. */
7794                 if (ndlp) {
7795                         ndlp->nlp_prev_state = NLP_STE_UNUSED_NODE;
7796                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
7797                 } else {
7798                         ndlp = lpfc_nlp_init(vport, NameServer_DID);
7799                         if (!ndlp) {
7800                                 lpfc_els_flush_rscn(vport);
7801                                 return 0;
7802                         }
7803                         ndlp->nlp_prev_state = ndlp->nlp_state;
7804                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
7805                 }
7806                 ndlp->nlp_type |= NLP_FABRIC;
7807                 lpfc_issue_els_plogi(vport, NameServer_DID, 0);
7808                 /* Wait for NameServer login cmpl before we can
7809                  * continue
7810                  */
7811                 return 1;
7812         }
7813
7814         lpfc_els_flush_rscn(vport);
7815         return 0;
7816 }
7817
7818 /**
7819  * lpfc_els_rcv_flogi - Process an unsolicited flogi iocb
7820  * @vport: pointer to a host virtual N_Port data structure.
7821  * @cmdiocb: pointer to lpfc command iocb data structure.
7822  * @ndlp: pointer to a node-list data structure.
7823  *
7824  * This routine processes Fabric Login (FLOGI) IOCB received as an ELS
7825  * unsolicited event. An unsolicited FLOGI can be received in a point-to-
7826  * point topology. As an unsolicited FLOGI should not be received in a loop
7827  * mode, any unsolicited FLOGI received in loop mode shall be ignored. The
7828  * lpfc_check_sparm() routine is invoked to check the parameters in the
7829  * unsolicited FLOGI. If parameters validation failed, the routine
7830  * lpfc_els_rsp_reject() shall be called with reject reason code set to
7831  * LSEXP_SPARM_OPTIONS to reject the FLOGI. Otherwise, the Port WWN in the
7832  * FLOGI shall be compared with the Port WWN of the @vport to determine who
7833  * will initiate PLOGI. The higher lexicographical value party shall has
7834  * higher priority (as the winning port) and will initiate PLOGI and
7835  * communicate Port_IDs (Addresses) for both nodes in PLOGI. The result
7836  * of this will be marked in the @vport fc_flag field with FC_PT2PT_PLOGI
7837  * and then the lpfc_els_rsp_acc() routine is invoked to accept the FLOGI.
7838  *
7839  * Return code
7840  *   0 - Successfully processed the unsolicited flogi
7841  *   1 - Failed to process the unsolicited flogi
7842  **/
7843 static int
7844 lpfc_els_rcv_flogi(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
7845                    struct lpfc_nodelist *ndlp)
7846 {
7847         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
7848         struct lpfc_hba  *phba = vport->phba;
7849         struct lpfc_dmabuf *pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
7850         uint32_t *lp = (uint32_t *) pcmd->virt;
7851         IOCB_t *icmd = &cmdiocb->iocb;
7852         struct serv_parm *sp;
7853         LPFC_MBOXQ_t *mbox;
7854         uint32_t cmd, did;
7855         int rc;
7856         uint32_t fc_flag = 0;
7857         uint32_t port_state = 0;
7858
7859         cmd = *lp++;
7860         sp = (struct serv_parm *) lp;
7861
7862         /* FLOGI received */
7863
7864         lpfc_set_disctmo(vport);
7865
7866         if (phba->fc_topology == LPFC_TOPOLOGY_LOOP) {
7867                 /* We should never receive a FLOGI in loop mode, ignore it */
7868                 did = icmd->un.elsreq64.remoteID;
7869
7870                 /* An FLOGI ELS command <elsCmd> was received from DID <did> in
7871                    Loop Mode */
7872                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
7873                                  "0113 An FLOGI ELS command x%x was "
7874                                  "received from DID x%x in Loop Mode\n",
7875                                  cmd, did);
7876                 return 1;
7877         }
7878
7879         (void) lpfc_check_sparm(vport, ndlp, sp, CLASS3, 1);
7880
7881         /*
7882          * If our portname is greater than the remote portname,
7883          * then we initiate Nport login.
7884          */
7885
7886         rc = memcmp(&vport->fc_portname, &sp->portName,
7887                     sizeof(struct lpfc_name));
7888
7889         if (!rc) {
7890                 if (phba->sli_rev < LPFC_SLI_REV4) {
7891                         mbox = mempool_alloc(phba->mbox_mem_pool,
7892                                              GFP_KERNEL);
7893                         if (!mbox)
7894                                 return 1;
7895                         lpfc_linkdown(phba);
7896                         lpfc_init_link(phba, mbox,
7897                                        phba->cfg_topology,
7898                                        phba->cfg_link_speed);
7899                         mbox->u.mb.un.varInitLnk.lipsr_AL_PA = 0;
7900                         mbox->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
7901                         mbox->vport = vport;
7902                         rc = lpfc_sli_issue_mbox(phba, mbox,
7903                                                  MBX_NOWAIT);
7904                         lpfc_set_loopback_flag(phba);
7905                         if (rc == MBX_NOT_FINISHED)
7906                                 mempool_free(mbox, phba->mbox_mem_pool);
7907                         return 1;
7908                 }
7909
7910                 /* abort the flogi coming back to ourselves
7911                  * due to external loopback on the port.
7912                  */
7913                 lpfc_els_abort_flogi(phba);
7914                 return 0;
7915
7916         } else if (rc > 0) {    /* greater than */
7917                 spin_lock_irq(shost->host_lock);
7918                 vport->fc_flag |= FC_PT2PT_PLOGI;
7919                 spin_unlock_irq(shost->host_lock);
7920
7921                 /* If we have the high WWPN we can assign our own
7922                  * myDID; otherwise, we have to WAIT for a PLOGI
7923                  * from the remote NPort to find out what it
7924                  * will be.
7925                  */
7926                 vport->fc_myDID = PT2PT_LocalID;
7927         } else {
7928                 vport->fc_myDID = PT2PT_RemoteID;
7929         }
7930
7931         /*
7932          * The vport state should go to LPFC_FLOGI only
7933          * AFTER we issue a FLOGI, not receive one.
7934          */
7935         spin_lock_irq(shost->host_lock);
7936         fc_flag = vport->fc_flag;
7937         port_state = vport->port_state;
7938         vport->fc_flag |= FC_PT2PT;
7939         vport->fc_flag &= ~(FC_FABRIC | FC_PUBLIC_LOOP);
7940
7941         /* Acking an unsol FLOGI.  Count 1 for link bounce
7942          * work-around.
7943          */
7944         vport->rcv_flogi_cnt++;
7945         spin_unlock_irq(shost->host_lock);
7946         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
7947                          "3311 Rcv Flogi PS x%x new PS x%x "
7948                          "fc_flag x%x new fc_flag x%x\n",
7949                          port_state, vport->port_state,
7950                          fc_flag, vport->fc_flag);
7951
7952         /*
7953          * We temporarily set fc_myDID to make it look like we are
7954          * a Fabric. This is done just so we end up with the right
7955          * did / sid on the FLOGI ACC rsp.
7956          */
7957         did = vport->fc_myDID;
7958         vport->fc_myDID = Fabric_DID;
7959
7960         memcpy(&phba->fc_fabparam, sp, sizeof(struct serv_parm));
7961
7962         /* Defer ACC response until AFTER we issue a FLOGI */
7963         if (!(phba->hba_flag & HBA_FLOGI_ISSUED)) {
7964                 phba->defer_flogi_acc_rx_id = cmdiocb->iocb.ulpContext;
7965                 phba->defer_flogi_acc_ox_id =
7966                                         cmdiocb->iocb.unsli3.rcvsli3.ox_id;
7967
7968                 vport->fc_myDID = did;
7969
7970                 lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
7971                                  "3344 Deferring FLOGI ACC: rx_id: x%x,"
7972                                  " ox_id: x%x, hba_flag x%x\n",
7973                                  phba->defer_flogi_acc_rx_id,
7974                                  phba->defer_flogi_acc_ox_id, phba->hba_flag);
7975
7976                 phba->defer_flogi_acc_flag = true;
7977
7978                 return 0;
7979         }
7980
7981         /* Send back ACC */
7982         lpfc_els_rsp_acc(vport, ELS_CMD_FLOGI, cmdiocb, ndlp, NULL);
7983
7984         /* Now lets put fc_myDID back to what its supposed to be */
7985         vport->fc_myDID = did;
7986
7987         return 0;
7988 }
7989
7990 /**
7991  * lpfc_els_rcv_rnid - Process an unsolicited rnid iocb
7992  * @vport: pointer to a host virtual N_Port data structure.
7993  * @cmdiocb: pointer to lpfc command iocb data structure.
7994  * @ndlp: pointer to a node-list data structure.
7995  *
7996  * This routine processes Request Node Identification Data (RNID) IOCB
7997  * received as an ELS unsolicited event. Only when the RNID specified format
7998  * 0x0 or 0xDF (Topology Discovery Specific Node Identification Data)
7999  * present, this routine will invoke the lpfc_els_rsp_rnid_acc() routine to
8000  * Accept (ACC) the RNID ELS command. All the other RNID formats are
8001  * rejected by invoking the lpfc_els_rsp_reject() routine.
8002  *
8003  * Return code
8004  *   0 - Successfully processed rnid iocb (currently always return 0)
8005  **/
8006 static int
8007 lpfc_els_rcv_rnid(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
8008                   struct lpfc_nodelist *ndlp)
8009 {
8010         struct lpfc_dmabuf *pcmd;
8011         uint32_t *lp;
8012         RNID *rn;
8013         struct ls_rjt stat;
8014
8015         pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
8016         lp = (uint32_t *) pcmd->virt;
8017
8018         lp++;
8019         rn = (RNID *) lp;
8020
8021         /* RNID received */
8022
8023         switch (rn->Format) {
8024         case 0:
8025         case RNID_TOPOLOGY_DISC:
8026                 /* Send back ACC */
8027                 lpfc_els_rsp_rnid_acc(vport, rn->Format, cmdiocb, ndlp);
8028                 break;
8029         default:
8030                 /* Reject this request because format not supported */
8031                 stat.un.b.lsRjtRsvd0 = 0;
8032                 stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
8033                 stat.un.b.lsRjtRsnCodeExp = LSEXP_CANT_GIVE_DATA;
8034                 stat.un.b.vendorUnique = 0;
8035                 lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp,
8036                         NULL);
8037         }
8038         return 0;
8039 }
8040
8041 /**
8042  * lpfc_els_rcv_echo - Process an unsolicited echo iocb
8043  * @vport: pointer to a host virtual N_Port data structure.
8044  * @cmdiocb: pointer to lpfc command iocb data structure.
8045  * @ndlp: pointer to a node-list data structure.
8046  *
8047  * Return code
8048  *   0 - Successfully processed echo iocb (currently always return 0)
8049  **/
8050 static int
8051 lpfc_els_rcv_echo(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
8052                   struct lpfc_nodelist *ndlp)
8053 {
8054         uint8_t *pcmd;
8055
8056         pcmd = (uint8_t *) (((struct lpfc_dmabuf *) cmdiocb->context2)->virt);
8057
8058         /* skip over first word of echo command to find echo data */
8059         pcmd += sizeof(uint32_t);
8060
8061         lpfc_els_rsp_echo_acc(vport, pcmd, cmdiocb, ndlp);
8062         return 0;
8063 }
8064
8065 /**
8066  * lpfc_els_rcv_lirr - Process an unsolicited lirr iocb
8067  * @vport: pointer to a host virtual N_Port data structure.
8068  * @cmdiocb: pointer to lpfc command iocb data structure.
8069  * @ndlp: pointer to a node-list data structure.
8070  *
8071  * This routine processes a Link Incident Report Registration(LIRR) IOCB
8072  * received as an ELS unsolicited event. Currently, this function just invokes
8073  * the lpfc_els_rsp_reject() routine to reject the LIRR IOCB unconditionally.
8074  *
8075  * Return code
8076  *   0 - Successfully processed lirr iocb (currently always return 0)
8077  **/
8078 static int
8079 lpfc_els_rcv_lirr(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
8080                   struct lpfc_nodelist *ndlp)
8081 {
8082         struct ls_rjt stat;
8083
8084         /* For now, unconditionally reject this command */
8085         stat.un.b.lsRjtRsvd0 = 0;
8086         stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
8087         stat.un.b.lsRjtRsnCodeExp = LSEXP_CANT_GIVE_DATA;
8088         stat.un.b.vendorUnique = 0;
8089         lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
8090         return 0;
8091 }
8092
8093 /**
8094  * lpfc_els_rcv_rrq - Process an unsolicited rrq iocb
8095  * @vport: pointer to a host virtual N_Port data structure.
8096  * @cmdiocb: pointer to lpfc command iocb data structure.
8097  * @ndlp: pointer to a node-list data structure.
8098  *
8099  * This routine processes a Reinstate Recovery Qualifier (RRQ) IOCB
8100  * received as an ELS unsolicited event. A request to RRQ shall only
8101  * be accepted if the Originator Nx_Port N_Port_ID or the Responder
8102  * Nx_Port N_Port_ID of the target Exchange is the same as the
8103  * N_Port_ID of the Nx_Port that makes the request. If the RRQ is
8104  * not accepted, an LS_RJT with reason code "Unable to perform
8105  * command request" and reason code explanation "Invalid Originator
8106  * S_ID" shall be returned. For now, we just unconditionally accept
8107  * RRQ from the target.
8108  **/
8109 static void
8110 lpfc_els_rcv_rrq(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
8111                  struct lpfc_nodelist *ndlp)
8112 {
8113         lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
8114         if (vport->phba->sli_rev == LPFC_SLI_REV4)
8115                 lpfc_els_clear_rrq(vport, cmdiocb, ndlp);
8116 }
8117
8118 /**
8119  * lpfc_els_rsp_rls_acc - Completion callbk func for MBX_READ_LNK_STAT mbox cmd
8120  * @phba: pointer to lpfc hba data structure.
8121  * @pmb: pointer to the driver internal queue element for mailbox command.
8122  *
8123  * This routine is the completion callback function for the MBX_READ_LNK_STAT
8124  * mailbox command. This callback function is to actually send the Accept
8125  * (ACC) response to a Read Link Status (RLS) unsolicited IOCB event. It
8126  * collects the link statistics from the completion of the MBX_READ_LNK_STAT
8127  * mailbox command, constructs the RLS response with the link statistics
8128  * collected, and then invokes the lpfc_sli_issue_iocb() routine to send ACC
8129  * response to the RLS.
8130  *
8131  * Note that the ndlp reference count will be incremented by 1 for holding the
8132  * ndlp and the reference to ndlp will be stored into the context1 field of
8133  * the IOCB for the completion callback function to the RLS Accept Response
8134  * ELS IOCB command.
8135  *
8136  **/
8137 static void
8138 lpfc_els_rsp_rls_acc(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
8139 {
8140         int rc = 0;
8141         MAILBOX_t *mb;
8142         IOCB_t *icmd;
8143         struct RLS_RSP *rls_rsp;
8144         uint8_t *pcmd;
8145         struct lpfc_iocbq *elsiocb;
8146         struct lpfc_nodelist *ndlp;
8147         uint16_t oxid;
8148         uint16_t rxid;
8149         uint32_t cmdsize;
8150
8151         mb = &pmb->u.mb;
8152
8153         ndlp = (struct lpfc_nodelist *)pmb->ctx_ndlp;
8154         rxid = (uint16_t)((unsigned long)(pmb->ctx_buf) & 0xffff);
8155         oxid = (uint16_t)(((unsigned long)(pmb->ctx_buf) >> 16) & 0xffff);
8156         pmb->ctx_buf = NULL;
8157         pmb->ctx_ndlp = NULL;
8158
8159         if (mb->mbxStatus) {
8160                 mempool_free(pmb, phba->mbox_mem_pool);
8161                 return;
8162         }
8163
8164         cmdsize = sizeof(struct RLS_RSP) + sizeof(uint32_t);
8165         elsiocb = lpfc_prep_els_iocb(phba->pport, 0, cmdsize,
8166                                      lpfc_max_els_tries, ndlp,
8167                                      ndlp->nlp_DID, ELS_CMD_ACC);
8168
8169         /* Decrement the ndlp reference count from previous mbox command */
8170         lpfc_nlp_put(ndlp);
8171
8172         if (!elsiocb) {
8173                 mempool_free(pmb, phba->mbox_mem_pool);
8174                 return;
8175         }
8176
8177         icmd = &elsiocb->iocb;
8178         icmd->ulpContext = rxid;
8179         icmd->unsli3.rcvsli3.ox_id = oxid;
8180
8181         pcmd = (uint8_t *) (((struct lpfc_dmabuf *) elsiocb->context2)->virt);
8182         *((uint32_t *) (pcmd)) = ELS_CMD_ACC;
8183         pcmd += sizeof(uint32_t); /* Skip past command */
8184         rls_rsp = (struct RLS_RSP *)pcmd;
8185
8186         rls_rsp->linkFailureCnt = cpu_to_be32(mb->un.varRdLnk.linkFailureCnt);
8187         rls_rsp->lossSyncCnt = cpu_to_be32(mb->un.varRdLnk.lossSyncCnt);
8188         rls_rsp->lossSignalCnt = cpu_to_be32(mb->un.varRdLnk.lossSignalCnt);
8189         rls_rsp->primSeqErrCnt = cpu_to_be32(mb->un.varRdLnk.primSeqErrCnt);
8190         rls_rsp->invalidXmitWord = cpu_to_be32(mb->un.varRdLnk.invalidXmitWord);
8191         rls_rsp->crcCnt = cpu_to_be32(mb->un.varRdLnk.crcCnt);
8192         mempool_free(pmb, phba->mbox_mem_pool);
8193         /* Xmit ELS RLS ACC response tag <ulpIoTag> */
8194         lpfc_printf_vlog(ndlp->vport, KERN_INFO, LOG_ELS,
8195                          "2874 Xmit ELS RLS ACC response tag x%x xri x%x, "
8196                          "did x%x, nlp_flag x%x, nlp_state x%x, rpi x%x\n",
8197                          elsiocb->iotag, elsiocb->iocb.ulpContext,
8198                          ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
8199                          ndlp->nlp_rpi);
8200         elsiocb->iocb_cmpl = lpfc_cmpl_els_rsp;
8201         phba->fc_stat.elsXmitACC++;
8202         elsiocb->context1 = lpfc_nlp_get(ndlp);
8203         if (!elsiocb->context1) {
8204                 lpfc_els_free_iocb(phba, elsiocb);
8205                 return;
8206         }
8207
8208         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
8209         if (rc == IOCB_ERROR) {
8210                 lpfc_els_free_iocb(phba, elsiocb);
8211                 lpfc_nlp_put(ndlp);
8212         }
8213         return;
8214 }
8215
8216 /**
8217  * lpfc_els_rcv_rls - Process an unsolicited rls iocb
8218  * @vport: pointer to a host virtual N_Port data structure.
8219  * @cmdiocb: pointer to lpfc command iocb data structure.
8220  * @ndlp: pointer to a node-list data structure.
8221  *
8222  * This routine processes Read Link Status (RLS) IOCB received as an
8223  * ELS unsolicited event. It first checks the remote port state. If the
8224  * remote port is not in NLP_STE_UNMAPPED_NODE state or NLP_STE_MAPPED_NODE
8225  * state, it invokes the lpfc_els_rsl_reject() routine to send the reject
8226  * response. Otherwise, it issue the MBX_READ_LNK_STAT mailbox command
8227  * for reading the HBA link statistics. It is for the callback function,
8228  * lpfc_els_rsp_rls_acc(), set to the MBX_READ_LNK_STAT mailbox command
8229  * to actually sending out RPL Accept (ACC) response.
8230  *
8231  * Return codes
8232  *   0 - Successfully processed rls iocb (currently always return 0)
8233  **/
8234 static int
8235 lpfc_els_rcv_rls(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
8236                  struct lpfc_nodelist *ndlp)
8237 {
8238         struct lpfc_hba *phba = vport->phba;
8239         LPFC_MBOXQ_t *mbox;
8240         struct ls_rjt stat;
8241
8242         if ((ndlp->nlp_state != NLP_STE_UNMAPPED_NODE) &&
8243             (ndlp->nlp_state != NLP_STE_MAPPED_NODE))
8244                 /* reject the unsolicited RLS request and done with it */
8245                 goto reject_out;
8246
8247         mbox = mempool_alloc(phba->mbox_mem_pool, GFP_ATOMIC);
8248         if (mbox) {
8249                 lpfc_read_lnk_stat(phba, mbox);
8250                 mbox->ctx_buf = (void *)((unsigned long)
8251                         ((cmdiocb->iocb.unsli3.rcvsli3.ox_id << 16) |
8252                         cmdiocb->iocb.ulpContext)); /* rx_id */
8253                 mbox->ctx_ndlp = lpfc_nlp_get(ndlp);
8254                 if (!mbox->ctx_ndlp)
8255                         goto node_err;
8256                 mbox->vport = vport;
8257                 mbox->mbox_cmpl = lpfc_els_rsp_rls_acc;
8258                 if (lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT)
8259                         != MBX_NOT_FINISHED)
8260                         /* Mbox completion will send ELS Response */
8261                         return 0;
8262                 /* Decrement reference count used for the failed mbox
8263                  * command.
8264                  */
8265                 lpfc_nlp_put(ndlp);
8266 node_err:
8267                 mempool_free(mbox, phba->mbox_mem_pool);
8268         }
8269 reject_out:
8270         /* issue rejection response */
8271         stat.un.b.lsRjtRsvd0 = 0;
8272         stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
8273         stat.un.b.lsRjtRsnCodeExp = LSEXP_CANT_GIVE_DATA;
8274         stat.un.b.vendorUnique = 0;
8275         lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
8276         return 0;
8277 }
8278
8279 /**
8280  * lpfc_els_rcv_rtv - Process an unsolicited rtv iocb
8281  * @vport: pointer to a host virtual N_Port data structure.
8282  * @cmdiocb: pointer to lpfc command iocb data structure.
8283  * @ndlp: pointer to a node-list data structure.
8284  *
8285  * This routine processes Read Timout Value (RTV) IOCB received as an
8286  * ELS unsolicited event. It first checks the remote port state. If the
8287  * remote port is not in NLP_STE_UNMAPPED_NODE state or NLP_STE_MAPPED_NODE
8288  * state, it invokes the lpfc_els_rsl_reject() routine to send the reject
8289  * response. Otherwise, it sends the Accept(ACC) response to a Read Timeout
8290  * Value (RTV) unsolicited IOCB event.
8291  *
8292  * Note that the ndlp reference count will be incremented by 1 for holding the
8293  * ndlp and the reference to ndlp will be stored into the context1 field of
8294  * the IOCB for the completion callback function to the RTV Accept Response
8295  * ELS IOCB command.
8296  *
8297  * Return codes
8298  *   0 - Successfully processed rtv iocb (currently always return 0)
8299  **/
8300 static int
8301 lpfc_els_rcv_rtv(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
8302                  struct lpfc_nodelist *ndlp)
8303 {
8304         int rc = 0;
8305         struct lpfc_hba *phba = vport->phba;
8306         struct ls_rjt stat;
8307         struct RTV_RSP *rtv_rsp;
8308         uint8_t *pcmd;
8309         struct lpfc_iocbq *elsiocb;
8310         uint32_t cmdsize;
8311
8312
8313         if ((ndlp->nlp_state != NLP_STE_UNMAPPED_NODE) &&
8314             (ndlp->nlp_state != NLP_STE_MAPPED_NODE))
8315                 /* reject the unsolicited RTV request and done with it */
8316                 goto reject_out;
8317
8318         cmdsize = sizeof(struct RTV_RSP) + sizeof(uint32_t);
8319         elsiocb = lpfc_prep_els_iocb(phba->pport, 0, cmdsize,
8320                                      lpfc_max_els_tries, ndlp,
8321                                      ndlp->nlp_DID, ELS_CMD_ACC);
8322
8323         if (!elsiocb)
8324                 return 1;
8325
8326         pcmd = (uint8_t *) (((struct lpfc_dmabuf *) elsiocb->context2)->virt);
8327         *((uint32_t *) (pcmd)) = ELS_CMD_ACC;
8328         pcmd += sizeof(uint32_t); /* Skip past command */
8329
8330         /* use the command's xri in the response */
8331         elsiocb->iocb.ulpContext = cmdiocb->iocb.ulpContext;  /* Xri / rx_id */
8332         elsiocb->iocb.unsli3.rcvsli3.ox_id = cmdiocb->iocb.unsli3.rcvsli3.ox_id;
8333
8334         rtv_rsp = (struct RTV_RSP *)pcmd;
8335
8336         /* populate RTV payload */
8337         rtv_rsp->ratov = cpu_to_be32(phba->fc_ratov * 1000); /* report msecs */
8338         rtv_rsp->edtov = cpu_to_be32(phba->fc_edtov);
8339         bf_set(qtov_edtovres, rtv_rsp, phba->fc_edtovResol ? 1 : 0);
8340         bf_set(qtov_rttov, rtv_rsp, 0); /* Field is for FC ONLY */
8341         rtv_rsp->qtov = cpu_to_be32(rtv_rsp->qtov);
8342
8343         /* Xmit ELS RLS ACC response tag <ulpIoTag> */
8344         lpfc_printf_vlog(ndlp->vport, KERN_INFO, LOG_ELS,
8345                          "2875 Xmit ELS RTV ACC response tag x%x xri x%x, "
8346                          "did x%x, nlp_flag x%x, nlp_state x%x, rpi x%x, "
8347                          "Data: x%x x%x x%x\n",
8348                          elsiocb->iotag, elsiocb->iocb.ulpContext,
8349                          ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
8350                          ndlp->nlp_rpi,
8351                         rtv_rsp->ratov, rtv_rsp->edtov, rtv_rsp->qtov);
8352         elsiocb->iocb_cmpl = lpfc_cmpl_els_rsp;
8353         phba->fc_stat.elsXmitACC++;
8354         elsiocb->context1 = lpfc_nlp_get(ndlp);
8355         if (!elsiocb->context1) {
8356                 lpfc_els_free_iocb(phba, elsiocb);
8357                 return 0;
8358         }
8359
8360         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
8361         if (rc == IOCB_ERROR) {
8362                 lpfc_els_free_iocb(phba, elsiocb);
8363                 lpfc_nlp_put(ndlp);
8364         }
8365         return 0;
8366
8367 reject_out:
8368         /* issue rejection response */
8369         stat.un.b.lsRjtRsvd0 = 0;
8370         stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
8371         stat.un.b.lsRjtRsnCodeExp = LSEXP_CANT_GIVE_DATA;
8372         stat.un.b.vendorUnique = 0;
8373         lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
8374         return 0;
8375 }
8376
8377 /* lpfc_issue_els_rrq - Process an unsolicited rrq iocb
8378  * @vport: pointer to a host virtual N_Port data structure.
8379  * @ndlp: pointer to a node-list data structure.
8380  * @did: DID of the target.
8381  * @rrq: Pointer to the rrq struct.
8382  *
8383  * Build a ELS RRQ command and send it to the target. If the issue_iocb is
8384  * Successful the the completion handler will clear the RRQ.
8385  *
8386  * Return codes
8387  *   0 - Successfully sent rrq els iocb.
8388  *   1 - Failed to send rrq els iocb.
8389  **/
8390 static int
8391 lpfc_issue_els_rrq(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
8392                         uint32_t did, struct lpfc_node_rrq *rrq)
8393 {
8394         struct lpfc_hba  *phba = vport->phba;
8395         struct RRQ *els_rrq;
8396         struct lpfc_iocbq *elsiocb;
8397         uint8_t *pcmd;
8398         uint16_t cmdsize;
8399         int ret;
8400
8401         if (!ndlp)
8402                 return 1;
8403
8404         /* If ndlp is not NULL, we will bump the reference count on it */
8405         cmdsize = (sizeof(uint32_t) + sizeof(struct RRQ));
8406         elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, 0, ndlp, did,
8407                                      ELS_CMD_RRQ);
8408         if (!elsiocb)
8409                 return 1;
8410
8411         pcmd = (uint8_t *) (((struct lpfc_dmabuf *) elsiocb->context2)->virt);
8412
8413         /* For RRQ request, remainder of payload is Exchange IDs */
8414         *((uint32_t *) (pcmd)) = ELS_CMD_RRQ;
8415         pcmd += sizeof(uint32_t);
8416         els_rrq = (struct RRQ *) pcmd;
8417
8418         bf_set(rrq_oxid, els_rrq, phba->sli4_hba.xri_ids[rrq->xritag]);
8419         bf_set(rrq_rxid, els_rrq, rrq->rxid);
8420         bf_set(rrq_did, els_rrq, vport->fc_myDID);
8421         els_rrq->rrq = cpu_to_be32(els_rrq->rrq);
8422         els_rrq->rrq_exchg = cpu_to_be32(els_rrq->rrq_exchg);
8423
8424
8425         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
8426                 "Issue RRQ:     did:x%x",
8427                 did, rrq->xritag, rrq->rxid);
8428         elsiocb->context_un.rrq = rrq;
8429         elsiocb->iocb_cmpl = lpfc_cmpl_els_rrq;
8430
8431         lpfc_nlp_get(ndlp);
8432         elsiocb->context1 = ndlp;
8433
8434         ret = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
8435         if (ret == IOCB_ERROR)
8436                 goto io_err;
8437         return 0;
8438
8439  io_err:
8440         lpfc_els_free_iocb(phba, elsiocb);
8441         lpfc_nlp_put(ndlp);
8442         return 1;
8443 }
8444
8445 /**
8446  * lpfc_send_rrq - Sends ELS RRQ if needed.
8447  * @phba: pointer to lpfc hba data structure.
8448  * @rrq: pointer to the active rrq.
8449  *
8450  * This routine will call the lpfc_issue_els_rrq if the rrq is
8451  * still active for the xri. If this function returns a failure then
8452  * the caller needs to clean up the RRQ by calling lpfc_clr_active_rrq.
8453  *
8454  * Returns 0 Success.
8455  *         1 Failure.
8456  **/
8457 int
8458 lpfc_send_rrq(struct lpfc_hba *phba, struct lpfc_node_rrq *rrq)
8459 {
8460         struct lpfc_nodelist *ndlp = lpfc_findnode_did(rrq->vport,
8461                                                        rrq->nlp_DID);
8462         if (!ndlp)
8463                 return 1;
8464
8465         if (lpfc_test_rrq_active(phba, ndlp, rrq->xritag))
8466                 return lpfc_issue_els_rrq(rrq->vport, ndlp,
8467                                          rrq->nlp_DID, rrq);
8468         else
8469                 return 1;
8470 }
8471
8472 /**
8473  * lpfc_els_rsp_rpl_acc - Issue an accept rpl els command
8474  * @vport: pointer to a host virtual N_Port data structure.
8475  * @cmdsize: size of the ELS command.
8476  * @oldiocb: pointer to the original lpfc command iocb data structure.
8477  * @ndlp: pointer to a node-list data structure.
8478  *
8479  * This routine issuees an Accept (ACC) Read Port List (RPL) ELS command.
8480  * It is to be called by the lpfc_els_rcv_rpl() routine to accept the RPL.
8481  *
8482  * Note that the ndlp reference count will be incremented by 1 for holding the
8483  * ndlp and the reference to ndlp will be stored into the context1 field of
8484  * the IOCB for the completion callback function to the RPL Accept Response
8485  * ELS command.
8486  *
8487  * Return code
8488  *   0 - Successfully issued ACC RPL ELS command
8489  *   1 - Failed to issue ACC RPL ELS command
8490  **/
8491 static int
8492 lpfc_els_rsp_rpl_acc(struct lpfc_vport *vport, uint16_t cmdsize,
8493                      struct lpfc_iocbq *oldiocb, struct lpfc_nodelist *ndlp)
8494 {
8495         int rc = 0;
8496         struct lpfc_hba *phba = vport->phba;
8497         IOCB_t *icmd, *oldcmd;
8498         RPL_RSP rpl_rsp;
8499         struct lpfc_iocbq *elsiocb;
8500         uint8_t *pcmd;
8501
8502         elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, oldiocb->retry, ndlp,
8503                                      ndlp->nlp_DID, ELS_CMD_ACC);
8504
8505         if (!elsiocb)
8506                 return 1;
8507
8508         icmd = &elsiocb->iocb;
8509         oldcmd = &oldiocb->iocb;
8510         icmd->ulpContext = oldcmd->ulpContext;  /* Xri / rx_id */
8511         icmd->unsli3.rcvsli3.ox_id = oldcmd->unsli3.rcvsli3.ox_id;
8512
8513         pcmd = (((struct lpfc_dmabuf *) elsiocb->context2)->virt);
8514         *((uint32_t *) (pcmd)) = ELS_CMD_ACC;
8515         pcmd += sizeof(uint16_t);
8516         *((uint16_t *)(pcmd)) = be16_to_cpu(cmdsize);
8517         pcmd += sizeof(uint16_t);
8518
8519         /* Setup the RPL ACC payload */
8520         rpl_rsp.listLen = be32_to_cpu(1);
8521         rpl_rsp.index = 0;
8522         rpl_rsp.port_num_blk.portNum = 0;
8523         rpl_rsp.port_num_blk.portID = be32_to_cpu(vport->fc_myDID);
8524         memcpy(&rpl_rsp.port_num_blk.portName, &vport->fc_portname,
8525             sizeof(struct lpfc_name));
8526         memcpy(pcmd, &rpl_rsp, cmdsize - sizeof(uint32_t));
8527         /* Xmit ELS RPL ACC response tag <ulpIoTag> */
8528         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
8529                          "0120 Xmit ELS RPL ACC response tag x%x "
8530                          "xri x%x, did x%x, nlp_flag x%x, nlp_state x%x, "
8531                          "rpi x%x\n",
8532                          elsiocb->iotag, elsiocb->iocb.ulpContext,
8533                          ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
8534                          ndlp->nlp_rpi);
8535         elsiocb->iocb_cmpl = lpfc_cmpl_els_rsp;
8536         phba->fc_stat.elsXmitACC++;
8537         elsiocb->context1 = lpfc_nlp_get(ndlp);
8538         if (!elsiocb->context1) {
8539                 lpfc_els_free_iocb(phba, elsiocb);
8540                 return 1;
8541         }
8542
8543         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
8544         if (rc == IOCB_ERROR) {
8545                 lpfc_els_free_iocb(phba, elsiocb);
8546                 lpfc_nlp_put(ndlp);
8547                 return 1;
8548         }
8549
8550         return 0;
8551 }
8552
8553 /**
8554  * lpfc_els_rcv_rpl - Process an unsolicited rpl iocb
8555  * @vport: pointer to a host virtual N_Port data structure.
8556  * @cmdiocb: pointer to lpfc command iocb data structure.
8557  * @ndlp: pointer to a node-list data structure.
8558  *
8559  * This routine processes Read Port List (RPL) IOCB received as an ELS
8560  * unsolicited event. It first checks the remote port state. If the remote
8561  * port is not in NLP_STE_UNMAPPED_NODE and NLP_STE_MAPPED_NODE states, it
8562  * invokes the lpfc_els_rsp_reject() routine to send reject response.
8563  * Otherwise, this routine then invokes the lpfc_els_rsp_rpl_acc() routine
8564  * to accept the RPL.
8565  *
8566  * Return code
8567  *   0 - Successfully processed rpl iocb (currently always return 0)
8568  **/
8569 static int
8570 lpfc_els_rcv_rpl(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
8571                  struct lpfc_nodelist *ndlp)
8572 {
8573         struct lpfc_dmabuf *pcmd;
8574         uint32_t *lp;
8575         uint32_t maxsize;
8576         uint16_t cmdsize;
8577         RPL *rpl;
8578         struct ls_rjt stat;
8579
8580         if ((ndlp->nlp_state != NLP_STE_UNMAPPED_NODE) &&
8581             (ndlp->nlp_state != NLP_STE_MAPPED_NODE)) {
8582                 /* issue rejection response */
8583                 stat.un.b.lsRjtRsvd0 = 0;
8584                 stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
8585                 stat.un.b.lsRjtRsnCodeExp = LSEXP_CANT_GIVE_DATA;
8586                 stat.un.b.vendorUnique = 0;
8587                 lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp,
8588                         NULL);
8589                 /* rejected the unsolicited RPL request and done with it */
8590                 return 0;
8591         }
8592
8593         pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
8594         lp = (uint32_t *) pcmd->virt;
8595         rpl = (RPL *) (lp + 1);
8596         maxsize = be32_to_cpu(rpl->maxsize);
8597
8598         /* We support only one port */
8599         if ((rpl->index == 0) &&
8600             ((maxsize == 0) ||
8601              ((maxsize * sizeof(uint32_t)) >= sizeof(RPL_RSP)))) {
8602                 cmdsize = sizeof(uint32_t) + sizeof(RPL_RSP);
8603         } else {
8604                 cmdsize = sizeof(uint32_t) + maxsize * sizeof(uint32_t);
8605         }
8606         lpfc_els_rsp_rpl_acc(vport, cmdsize, cmdiocb, ndlp);
8607
8608         return 0;
8609 }
8610
8611 /**
8612  * lpfc_els_rcv_farp - Process an unsolicited farp request els command
8613  * @vport: pointer to a virtual N_Port data structure.
8614  * @cmdiocb: pointer to lpfc command iocb data structure.
8615  * @ndlp: pointer to a node-list data structure.
8616  *
8617  * This routine processes Fibre Channel Address Resolution Protocol
8618  * (FARP) Request IOCB received as an ELS unsolicited event. Currently,
8619  * the lpfc driver only supports matching on WWPN or WWNN for FARP. As such,
8620  * FARP_MATCH_PORT flag and FARP_MATCH_NODE flag are checked against the
8621  * Match Flag in the FARP request IOCB: if FARP_MATCH_PORT flag is set, the
8622  * remote PortName is compared against the FC PortName stored in the @vport
8623  * data structure; if FARP_MATCH_NODE flag is set, the remote NodeName is
8624  * compared against the FC NodeName stored in the @vport data structure.
8625  * If any of these matches and the FARP_REQUEST_FARPR flag is set in the
8626  * FARP request IOCB Response Flag, the lpfc_issue_els_farpr() routine is
8627  * invoked to send out FARP Response to the remote node. Before sending the
8628  * FARP Response, however, the FARP_REQUEST_PLOGI flag is check in the FARP
8629  * request IOCB Response Flag and, if it is set, the lpfc_issue_els_plogi()
8630  * routine is invoked to log into the remote port first.
8631  *
8632  * Return code
8633  *   0 - Either the FARP Match Mode not supported or successfully processed
8634  **/
8635 static int
8636 lpfc_els_rcv_farp(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
8637                   struct lpfc_nodelist *ndlp)
8638 {
8639         struct lpfc_dmabuf *pcmd;
8640         uint32_t *lp;
8641         IOCB_t *icmd;
8642         FARP *fp;
8643         uint32_t cnt, did;
8644
8645         icmd = &cmdiocb->iocb;
8646         did = icmd->un.elsreq64.remoteID;
8647         pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
8648         lp = (uint32_t *) pcmd->virt;
8649
8650         lp++;
8651         fp = (FARP *) lp;
8652         /* FARP-REQ received from DID <did> */
8653         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
8654                          "0601 FARP-REQ received from DID x%x\n", did);
8655         /* We will only support match on WWPN or WWNN */
8656         if (fp->Mflags & ~(FARP_MATCH_NODE | FARP_MATCH_PORT)) {
8657                 return 0;
8658         }
8659
8660         cnt = 0;
8661         /* If this FARP command is searching for my portname */
8662         if (fp->Mflags & FARP_MATCH_PORT) {
8663                 if (memcmp(&fp->RportName, &vport->fc_portname,
8664                            sizeof(struct lpfc_name)) == 0)
8665                         cnt = 1;
8666         }
8667
8668         /* If this FARP command is searching for my nodename */
8669         if (fp->Mflags & FARP_MATCH_NODE) {
8670                 if (memcmp(&fp->RnodeName, &vport->fc_nodename,
8671                            sizeof(struct lpfc_name)) == 0)
8672                         cnt = 1;
8673         }
8674
8675         if (cnt) {
8676                 if ((ndlp->nlp_state == NLP_STE_UNMAPPED_NODE) ||
8677                    (ndlp->nlp_state == NLP_STE_MAPPED_NODE)) {
8678                         /* Log back into the node before sending the FARP. */
8679                         if (fp->Rflags & FARP_REQUEST_PLOGI) {
8680                                 ndlp->nlp_prev_state = ndlp->nlp_state;
8681                                 lpfc_nlp_set_state(vport, ndlp,
8682                                                    NLP_STE_PLOGI_ISSUE);
8683                                 lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0);
8684                         }
8685
8686                         /* Send a FARP response to that node */
8687                         if (fp->Rflags & FARP_REQUEST_FARPR)
8688                                 lpfc_issue_els_farpr(vport, did, 0);
8689                 }
8690         }
8691         return 0;
8692 }
8693
8694 /**
8695  * lpfc_els_rcv_farpr - Process an unsolicited farp response iocb
8696  * @vport: pointer to a host virtual N_Port data structure.
8697  * @cmdiocb: pointer to lpfc command iocb data structure.
8698  * @ndlp: pointer to a node-list data structure.
8699  *
8700  * This routine processes Fibre Channel Address Resolution Protocol
8701  * Response (FARPR) IOCB received as an ELS unsolicited event. It simply
8702  * invokes the lpfc_els_rsp_acc() routine to the remote node to accept
8703  * the FARP response request.
8704  *
8705  * Return code
8706  *   0 - Successfully processed FARPR IOCB (currently always return 0)
8707  **/
8708 static int
8709 lpfc_els_rcv_farpr(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
8710                    struct lpfc_nodelist  *ndlp)
8711 {
8712         struct lpfc_dmabuf *pcmd;
8713         uint32_t *lp;
8714         IOCB_t *icmd;
8715         uint32_t did;
8716
8717         icmd = &cmdiocb->iocb;
8718         did = icmd->un.elsreq64.remoteID;
8719         pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
8720         lp = (uint32_t *) pcmd->virt;
8721
8722         lp++;
8723         /* FARP-RSP received from DID <did> */
8724         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
8725                          "0600 FARP-RSP received from DID x%x\n", did);
8726         /* ACCEPT the Farp resp request */
8727         lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
8728
8729         return 0;
8730 }
8731
8732 /**
8733  * lpfc_els_rcv_fan - Process an unsolicited fan iocb command
8734  * @vport: pointer to a host virtual N_Port data structure.
8735  * @cmdiocb: pointer to lpfc command iocb data structure.
8736  * @fan_ndlp: pointer to a node-list data structure.
8737  *
8738  * This routine processes a Fabric Address Notification (FAN) IOCB
8739  * command received as an ELS unsolicited event. The FAN ELS command will
8740  * only be processed on a physical port (i.e., the @vport represents the
8741  * physical port). The fabric NodeName and PortName from the FAN IOCB are
8742  * compared against those in the phba data structure. If any of those is
8743  * different, the lpfc_initial_flogi() routine is invoked to initialize
8744  * Fabric Login (FLOGI) to the fabric to start the discover over. Otherwise,
8745  * if both of those are identical, the lpfc_issue_fabric_reglogin() routine
8746  * is invoked to register login to the fabric.
8747  *
8748  * Return code
8749  *   0 - Successfully processed fan iocb (currently always return 0).
8750  **/
8751 static int
8752 lpfc_els_rcv_fan(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
8753                  struct lpfc_nodelist *fan_ndlp)
8754 {
8755         struct lpfc_hba *phba = vport->phba;
8756         uint32_t *lp;
8757         FAN *fp;
8758
8759         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS, "0265 FAN received\n");
8760         lp = (uint32_t *)((struct lpfc_dmabuf *)cmdiocb->context2)->virt;
8761         fp = (FAN *) ++lp;
8762         /* FAN received; Fan does not have a reply sequence */
8763         if ((vport == phba->pport) &&
8764             (vport->port_state == LPFC_LOCAL_CFG_LINK)) {
8765                 if ((memcmp(&phba->fc_fabparam.nodeName, &fp->FnodeName,
8766                             sizeof(struct lpfc_name))) ||
8767                     (memcmp(&phba->fc_fabparam.portName, &fp->FportName,
8768                             sizeof(struct lpfc_name)))) {
8769                         /* This port has switched fabrics. FLOGI is required */
8770                         lpfc_issue_init_vfi(vport);
8771                 } else {
8772                         /* FAN verified - skip FLOGI */
8773                         vport->fc_myDID = vport->fc_prevDID;
8774                         if (phba->sli_rev < LPFC_SLI_REV4)
8775                                 lpfc_issue_fabric_reglogin(vport);
8776                         else {
8777                                 lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
8778                                         "3138 Need register VFI: (x%x/%x)\n",
8779                                         vport->fc_prevDID, vport->fc_myDID);
8780                                 lpfc_issue_reg_vfi(vport);
8781                         }
8782                 }
8783         }
8784         return 0;
8785 }
8786
8787 /**
8788  * lpfc_els_rcv_edc - Process an unsolicited EDC iocb
8789  * @vport: pointer to a host virtual N_Port data structure.
8790  * @cmdiocb: pointer to lpfc command iocb data structure.
8791  * @ndlp: pointer to a node-list data structure.
8792  *
8793  * Return code
8794  *   0 - Successfully processed echo iocb (currently always return 0)
8795  **/
8796 static int
8797 lpfc_els_rcv_edc(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
8798                  struct lpfc_nodelist *ndlp)
8799 {
8800         struct lpfc_hba  *phba = vport->phba;
8801         struct fc_els_edc *edc_req;
8802         struct fc_tlv_desc *tlv;
8803         uint8_t *payload;
8804         uint32_t *ptr, dtag;
8805         const char *dtag_nm;
8806         int desc_cnt = 0, bytes_remain;
8807         bool rcv_cap_desc = false;
8808
8809         payload = ((struct lpfc_dmabuf *)cmdiocb->context2)->virt;
8810
8811         edc_req = (struct fc_els_edc *)payload;
8812         bytes_remain = be32_to_cpu(edc_req->desc_len);
8813
8814         ptr = (uint32_t *)payload;
8815         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS | LOG_CGN_MGMT,
8816                          "3319 Rcv EDC payload len %d: x%x x%x x%x\n",
8817                          bytes_remain, be32_to_cpu(*ptr),
8818                          be32_to_cpu(*(ptr + 1)), be32_to_cpu(*(ptr + 2)));
8819
8820         /* No signal support unless there is a congestion descriptor */
8821         phba->cgn_reg_signal = EDC_CG_SIG_NOTSUPPORTED;
8822         phba->cgn_sig_freq = 0;
8823         phba->cgn_reg_fpin = LPFC_CGN_FPIN_ALARM | LPFC_CGN_FPIN_WARN;
8824
8825         if (bytes_remain <= 0)
8826                 goto out;
8827
8828         tlv = edc_req->desc;
8829
8830         /*
8831          * cycle through EDC diagnostic descriptors to find the
8832          * congestion signaling capability descriptor
8833          */
8834         while (bytes_remain && !rcv_cap_desc) {
8835                 if (bytes_remain < FC_TLV_DESC_HDR_SZ) {
8836                         lpfc_printf_log(phba, KERN_WARNING, LOG_CGN_MGMT,
8837                                         "6464 Truncated TLV hdr on "
8838                                         "Diagnostic descriptor[%d]\n",
8839                                         desc_cnt);
8840                         goto out;
8841                 }
8842
8843                 dtag = be32_to_cpu(tlv->desc_tag);
8844                 switch (dtag) {
8845                 case ELS_DTAG_LNK_FAULT_CAP:
8846                         if (bytes_remain < FC_TLV_DESC_SZ_FROM_LENGTH(tlv) ||
8847                             FC_TLV_DESC_SZ_FROM_LENGTH(tlv) !=
8848                                 sizeof(struct fc_diag_lnkflt_desc)) {
8849                                 lpfc_printf_log(
8850                                         phba, KERN_WARNING, LOG_CGN_MGMT,
8851                                         "6465 Truncated Link Fault Diagnostic "
8852                                         "descriptor[%d]: %d vs 0x%zx 0x%zx\n",
8853                                         desc_cnt, bytes_remain,
8854                                         FC_TLV_DESC_SZ_FROM_LENGTH(tlv),
8855                                         sizeof(struct fc_diag_cg_sig_desc));
8856                                 goto out;
8857                         }
8858                         /* No action for Link Fault descriptor for now */
8859                         break;
8860                 case ELS_DTAG_CG_SIGNAL_CAP:
8861                         if (bytes_remain < FC_TLV_DESC_SZ_FROM_LENGTH(tlv) ||
8862                             FC_TLV_DESC_SZ_FROM_LENGTH(tlv) !=
8863                                 sizeof(struct fc_diag_cg_sig_desc)) {
8864                                 lpfc_printf_log(
8865                                         phba, KERN_WARNING, LOG_CGN_MGMT,
8866                                         "6466 Truncated cgn signal Diagnostic "
8867                                         "descriptor[%d]: %d vs 0x%zx 0x%zx\n",
8868                                         desc_cnt, bytes_remain,
8869                                         FC_TLV_DESC_SZ_FROM_LENGTH(tlv),
8870                                         sizeof(struct fc_diag_cg_sig_desc));
8871                                 goto out;
8872                         }
8873
8874                         phba->cgn_reg_fpin = phba->cgn_init_reg_fpin;
8875                         phba->cgn_reg_signal = phba->cgn_init_reg_signal;
8876
8877                         /* We start negotiation with lpfc_fabric_cgn_frequency.
8878                          * When we process the EDC, we will settle on the
8879                          * higher frequency.
8880                          */
8881                         phba->cgn_sig_freq = lpfc_fabric_cgn_frequency;
8882
8883                         lpfc_least_capable_settings(
8884                                 phba, (struct fc_diag_cg_sig_desc *)tlv);
8885                         rcv_cap_desc = true;
8886                         break;
8887                 default:
8888                         dtag_nm = lpfc_get_tlv_dtag_nm(dtag);
8889                         lpfc_printf_log(phba, KERN_WARNING, LOG_CGN_MGMT,
8890                                         "6467 unknown Diagnostic "
8891                                         "Descriptor[%d]: tag x%x (%s)\n",
8892                                         desc_cnt, dtag, dtag_nm);
8893                 }
8894                 bytes_remain -= FC_TLV_DESC_SZ_FROM_LENGTH(tlv);
8895                 tlv = fc_tlv_next_desc(tlv);
8896                 desc_cnt++;
8897         }
8898 out:
8899         /* Need to send back an ACC */
8900         lpfc_issue_els_edc_rsp(vport, cmdiocb, ndlp);
8901
8902         lpfc_config_cgn_signal(phba);
8903         return 0;
8904 }
8905
8906 /**
8907  * lpfc_els_timeout - Handler funciton to the els timer
8908  * @t: timer context used to obtain the vport.
8909  *
8910  * This routine is invoked by the ELS timer after timeout. It posts the ELS
8911  * timer timeout event by setting the WORKER_ELS_TMO bit to the work port
8912  * event bitmap and then invokes the lpfc_worker_wake_up() routine to wake
8913  * up the worker thread. It is for the worker thread to invoke the routine
8914  * lpfc_els_timeout_handler() to work on the posted event WORKER_ELS_TMO.
8915  **/
8916 void
8917 lpfc_els_timeout(struct timer_list *t)
8918 {
8919         struct lpfc_vport *vport = from_timer(vport, t, els_tmofunc);
8920         struct lpfc_hba   *phba = vport->phba;
8921         uint32_t tmo_posted;
8922         unsigned long iflag;
8923
8924         spin_lock_irqsave(&vport->work_port_lock, iflag);
8925         tmo_posted = vport->work_port_events & WORKER_ELS_TMO;
8926         if ((!tmo_posted) && (!(vport->load_flag & FC_UNLOADING)))
8927                 vport->work_port_events |= WORKER_ELS_TMO;
8928         spin_unlock_irqrestore(&vport->work_port_lock, iflag);
8929
8930         if ((!tmo_posted) && (!(vport->load_flag & FC_UNLOADING)))
8931                 lpfc_worker_wake_up(phba);
8932         return;
8933 }
8934
8935
8936 /**
8937  * lpfc_els_timeout_handler - Process an els timeout event
8938  * @vport: pointer to a virtual N_Port data structure.
8939  *
8940  * This routine is the actual handler function that processes an ELS timeout
8941  * event. It walks the ELS ring to get and abort all the IOCBs (except the
8942  * ABORT/CLOSE/FARP/FARPR/FDISC), which are associated with the @vport by
8943  * invoking the lpfc_sli_issue_abort_iotag() routine.
8944  **/
8945 void
8946 lpfc_els_timeout_handler(struct lpfc_vport *vport)
8947 {
8948         struct lpfc_hba  *phba = vport->phba;
8949         struct lpfc_sli_ring *pring;
8950         struct lpfc_iocbq *tmp_iocb, *piocb;
8951         IOCB_t *cmd = NULL;
8952         struct lpfc_dmabuf *pcmd;
8953         uint32_t els_command = 0;
8954         uint32_t timeout;
8955         uint32_t remote_ID = 0xffffffff;
8956         LIST_HEAD(abort_list);
8957
8958
8959         timeout = (uint32_t)(phba->fc_ratov << 1);
8960
8961         pring = lpfc_phba_elsring(phba);
8962         if (unlikely(!pring))
8963                 return;
8964
8965         if (phba->pport->load_flag & FC_UNLOADING)
8966                 return;
8967
8968         spin_lock_irq(&phba->hbalock);
8969         if (phba->sli_rev == LPFC_SLI_REV4)
8970                 spin_lock(&pring->ring_lock);
8971
8972         list_for_each_entry_safe(piocb, tmp_iocb, &pring->txcmplq, list) {
8973                 cmd = &piocb->iocb;
8974
8975                 if ((piocb->iocb_flag & LPFC_IO_LIBDFC) != 0 ||
8976                     piocb->iocb.ulpCommand == CMD_ABORT_XRI_CN ||
8977                     piocb->iocb.ulpCommand == CMD_CLOSE_XRI_CN)
8978                         continue;
8979
8980                 if (piocb->vport != vport)
8981                         continue;
8982
8983                 pcmd = (struct lpfc_dmabuf *) piocb->context2;
8984                 if (pcmd)
8985                         els_command = *(uint32_t *) (pcmd->virt);
8986
8987                 if (els_command == ELS_CMD_FARP ||
8988                     els_command == ELS_CMD_FARPR ||
8989                     els_command == ELS_CMD_FDISC)
8990                         continue;
8991
8992                 if (piocb->drvrTimeout > 0) {
8993                         if (piocb->drvrTimeout >= timeout)
8994                                 piocb->drvrTimeout -= timeout;
8995                         else
8996                                 piocb->drvrTimeout = 0;
8997                         continue;
8998                 }
8999
9000                 remote_ID = 0xffffffff;
9001                 if (cmd->ulpCommand != CMD_GEN_REQUEST64_CR)
9002                         remote_ID = cmd->un.elsreq64.remoteID;
9003                 else {
9004                         struct lpfc_nodelist *ndlp;
9005                         ndlp = __lpfc_findnode_rpi(vport, cmd->ulpContext);
9006                         if (ndlp)
9007                                 remote_ID = ndlp->nlp_DID;
9008                 }
9009                 list_add_tail(&piocb->dlist, &abort_list);
9010         }
9011         if (phba->sli_rev == LPFC_SLI_REV4)
9012                 spin_unlock(&pring->ring_lock);
9013         spin_unlock_irq(&phba->hbalock);
9014
9015         list_for_each_entry_safe(piocb, tmp_iocb, &abort_list, dlist) {
9016                 cmd = &piocb->iocb;
9017                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
9018                          "0127 ELS timeout Data: x%x x%x x%x "
9019                          "x%x\n", els_command,
9020                          remote_ID, cmd->ulpCommand, cmd->ulpIoTag);
9021                 spin_lock_irq(&phba->hbalock);
9022                 list_del_init(&piocb->dlist);
9023                 lpfc_sli_issue_abort_iotag(phba, pring, piocb, NULL);
9024                 spin_unlock_irq(&phba->hbalock);
9025         }
9026
9027         /* Make sure HBA is alive */
9028         lpfc_issue_hb_tmo(phba);
9029
9030         if (!list_empty(&pring->txcmplq))
9031                 if (!(phba->pport->load_flag & FC_UNLOADING))
9032                         mod_timer(&vport->els_tmofunc,
9033                                   jiffies + msecs_to_jiffies(1000 * timeout));
9034 }
9035
9036 /**
9037  * lpfc_els_flush_cmd - Clean up the outstanding els commands to a vport
9038  * @vport: pointer to a host virtual N_Port data structure.
9039  *
9040  * This routine is used to clean up all the outstanding ELS commands on a
9041  * @vport. It first aborts the @vport by invoking lpfc_fabric_abort_vport()
9042  * routine. After that, it walks the ELS transmit queue to remove all the
9043  * IOCBs with the @vport other than the QUE_RING and ABORT/CLOSE IOCBs. For
9044  * the IOCBs with a non-NULL completion callback function, the callback
9045  * function will be invoked with the status set to IOSTAT_LOCAL_REJECT and
9046  * un.ulpWord[4] set to IOERR_SLI_ABORTED. For IOCBs with a NULL completion
9047  * callback function, the IOCB will simply be released. Finally, it walks
9048  * the ELS transmit completion queue to issue an abort IOCB to any transmit
9049  * completion queue IOCB that is associated with the @vport and is not
9050  * an IOCB from libdfc (i.e., the management plane IOCBs that are not
9051  * part of the discovery state machine) out to HBA by invoking the
9052  * lpfc_sli_issue_abort_iotag() routine. Note that this function issues the
9053  * abort IOCB to any transmit completion queueed IOCB, it does not guarantee
9054  * the IOCBs are aborted when this function returns.
9055  **/
9056 void
9057 lpfc_els_flush_cmd(struct lpfc_vport *vport)
9058 {
9059         LIST_HEAD(abort_list);
9060         struct lpfc_hba  *phba = vport->phba;
9061         struct lpfc_sli_ring *pring;
9062         struct lpfc_iocbq *tmp_iocb, *piocb;
9063         IOCB_t *cmd = NULL;
9064         unsigned long iflags = 0;
9065
9066         lpfc_fabric_abort_vport(vport);
9067
9068         /*
9069          * For SLI3, only the hbalock is required.  But SLI4 needs to coordinate
9070          * with the ring insert operation.  Because lpfc_sli_issue_abort_iotag
9071          * ultimately grabs the ring_lock, the driver must splice the list into
9072          * a working list and release the locks before calling the abort.
9073          */
9074         spin_lock_irqsave(&phba->hbalock, iflags);
9075         pring = lpfc_phba_elsring(phba);
9076
9077         /* Bail out if we've no ELS wq, like in PCI error recovery case. */
9078         if (unlikely(!pring)) {
9079                 spin_unlock_irqrestore(&phba->hbalock, iflags);
9080                 return;
9081         }
9082
9083         if (phba->sli_rev == LPFC_SLI_REV4)
9084                 spin_lock(&pring->ring_lock);
9085
9086         /* First we need to issue aborts to outstanding cmds on txcmpl */
9087         list_for_each_entry_safe(piocb, tmp_iocb, &pring->txcmplq, list) {
9088                 if (piocb->iocb_flag & LPFC_IO_LIBDFC)
9089                         continue;
9090
9091                 if (piocb->vport != vport)
9092                         continue;
9093
9094                 if (piocb->iocb_flag & LPFC_DRIVER_ABORTED)
9095                         continue;
9096
9097                 /* On the ELS ring we can have ELS_REQUESTs or
9098                  * GEN_REQUESTs waiting for a response.
9099                  */
9100                 cmd = &piocb->iocb;
9101                 if (cmd->ulpCommand == CMD_ELS_REQUEST64_CR) {
9102                         list_add_tail(&piocb->dlist, &abort_list);
9103
9104                         /* If the link is down when flushing ELS commands
9105                          * the firmware will not complete them till after
9106                          * the link comes back up. This may confuse
9107                          * discovery for the new link up, so we need to
9108                          * change the compl routine to just clean up the iocb
9109                          * and avoid any retry logic.
9110                          */
9111                         if (phba->link_state == LPFC_LINK_DOWN)
9112                                 piocb->iocb_cmpl = lpfc_cmpl_els_link_down;
9113                 }
9114                 if (cmd->ulpCommand == CMD_GEN_REQUEST64_CR)
9115                         list_add_tail(&piocb->dlist, &abort_list);
9116         }
9117
9118         if (phba->sli_rev == LPFC_SLI_REV4)
9119                 spin_unlock(&pring->ring_lock);
9120         spin_unlock_irqrestore(&phba->hbalock, iflags);
9121
9122         /* Abort each txcmpl iocb on aborted list and remove the dlist links. */
9123         list_for_each_entry_safe(piocb, tmp_iocb, &abort_list, dlist) {
9124                 spin_lock_irqsave(&phba->hbalock, iflags);
9125                 list_del_init(&piocb->dlist);
9126                 lpfc_sli_issue_abort_iotag(phba, pring, piocb, NULL);
9127                 spin_unlock_irqrestore(&phba->hbalock, iflags);
9128         }
9129         /* Make sure HBA is alive */
9130         lpfc_issue_hb_tmo(phba);
9131
9132         if (!list_empty(&abort_list))
9133                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
9134                                  "3387 abort list for txq not empty\n");
9135         INIT_LIST_HEAD(&abort_list);
9136
9137         spin_lock_irqsave(&phba->hbalock, iflags);
9138         if (phba->sli_rev == LPFC_SLI_REV4)
9139                 spin_lock(&pring->ring_lock);
9140
9141         /* No need to abort the txq list,
9142          * just queue them up for lpfc_sli_cancel_iocbs
9143          */
9144         list_for_each_entry_safe(piocb, tmp_iocb, &pring->txq, list) {
9145                 cmd = &piocb->iocb;
9146
9147                 if (piocb->iocb_flag & LPFC_IO_LIBDFC) {
9148                         continue;
9149                 }
9150
9151                 /* Do not flush out the QUE_RING and ABORT/CLOSE iocbs */
9152                 if (cmd->ulpCommand == CMD_QUE_RING_BUF_CN ||
9153                     cmd->ulpCommand == CMD_QUE_RING_BUF64_CN ||
9154                     cmd->ulpCommand == CMD_CLOSE_XRI_CN ||
9155                     cmd->ulpCommand == CMD_ABORT_XRI_CN)
9156                         continue;
9157
9158                 if (piocb->vport != vport)
9159                         continue;
9160
9161                 list_del_init(&piocb->list);
9162                 list_add_tail(&piocb->list, &abort_list);
9163         }
9164
9165         /* The same holds true for any FLOGI/FDISC on the fabric_iocb_list */
9166         if (vport == phba->pport) {
9167                 list_for_each_entry_safe(piocb, tmp_iocb,
9168                                          &phba->fabric_iocb_list, list) {
9169                         cmd = &piocb->iocb;
9170                         list_del_init(&piocb->list);
9171                         list_add_tail(&piocb->list, &abort_list);
9172                 }
9173         }
9174
9175         if (phba->sli_rev == LPFC_SLI_REV4)
9176                 spin_unlock(&pring->ring_lock);
9177         spin_unlock_irqrestore(&phba->hbalock, iflags);
9178
9179         /* Cancel all the IOCBs from the completions list */
9180         lpfc_sli_cancel_iocbs(phba, &abort_list,
9181                               IOSTAT_LOCAL_REJECT, IOERR_SLI_ABORTED);
9182
9183         return;
9184 }
9185
9186 /**
9187  * lpfc_els_flush_all_cmd - Clean up all the outstanding els commands to a HBA
9188  * @phba: pointer to lpfc hba data structure.
9189  *
9190  * This routine is used to clean up all the outstanding ELS commands on a
9191  * @phba. It first aborts the @phba by invoking the lpfc_fabric_abort_hba()
9192  * routine. After that, it walks the ELS transmit queue to remove all the
9193  * IOCBs to the @phba other than the QUE_RING and ABORT/CLOSE IOCBs. For
9194  * the IOCBs with the completion callback function associated, the callback
9195  * function will be invoked with the status set to IOSTAT_LOCAL_REJECT and
9196  * un.ulpWord[4] set to IOERR_SLI_ABORTED. For IOCBs without the completion
9197  * callback function associated, the IOCB will simply be released. Finally,
9198  * it walks the ELS transmit completion queue to issue an abort IOCB to any
9199  * transmit completion queue IOCB that is not an IOCB from libdfc (i.e., the
9200  * management plane IOCBs that are not part of the discovery state machine)
9201  * out to HBA by invoking the lpfc_sli_issue_abort_iotag() routine.
9202  **/
9203 void
9204 lpfc_els_flush_all_cmd(struct lpfc_hba  *phba)
9205 {
9206         struct lpfc_vport *vport;
9207
9208         spin_lock_irq(&phba->port_list_lock);
9209         list_for_each_entry(vport, &phba->port_list, listentry)
9210                 lpfc_els_flush_cmd(vport);
9211         spin_unlock_irq(&phba->port_list_lock);
9212
9213         return;
9214 }
9215
9216 /**
9217  * lpfc_send_els_failure_event - Posts an ELS command failure event
9218  * @phba: Pointer to hba context object.
9219  * @cmdiocbp: Pointer to command iocb which reported error.
9220  * @rspiocbp: Pointer to response iocb which reported error.
9221  *
9222  * This function sends an event when there is an ELS command
9223  * failure.
9224  **/
9225 void
9226 lpfc_send_els_failure_event(struct lpfc_hba *phba,
9227                         struct lpfc_iocbq *cmdiocbp,
9228                         struct lpfc_iocbq *rspiocbp)
9229 {
9230         struct lpfc_vport *vport = cmdiocbp->vport;
9231         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
9232         struct lpfc_lsrjt_event lsrjt_event;
9233         struct lpfc_fabric_event_header fabric_event;
9234         struct ls_rjt stat;
9235         struct lpfc_nodelist *ndlp;
9236         uint32_t *pcmd;
9237
9238         ndlp = cmdiocbp->context1;
9239         if (!ndlp)
9240                 return;
9241
9242         if (rspiocbp->iocb.ulpStatus == IOSTAT_LS_RJT) {
9243                 lsrjt_event.header.event_type = FC_REG_ELS_EVENT;
9244                 lsrjt_event.header.subcategory = LPFC_EVENT_LSRJT_RCV;
9245                 memcpy(lsrjt_event.header.wwpn, &ndlp->nlp_portname,
9246                         sizeof(struct lpfc_name));
9247                 memcpy(lsrjt_event.header.wwnn, &ndlp->nlp_nodename,
9248                         sizeof(struct lpfc_name));
9249                 pcmd = (uint32_t *) (((struct lpfc_dmabuf *)
9250                         cmdiocbp->context2)->virt);
9251                 lsrjt_event.command = (pcmd != NULL) ? *pcmd : 0;
9252                 stat.un.lsRjtError = be32_to_cpu(rspiocbp->iocb.un.ulpWord[4]);
9253                 lsrjt_event.reason_code = stat.un.b.lsRjtRsnCode;
9254                 lsrjt_event.explanation = stat.un.b.lsRjtRsnCodeExp;
9255                 fc_host_post_vendor_event(shost,
9256                         fc_get_event_number(),
9257                         sizeof(lsrjt_event),
9258                         (char *)&lsrjt_event,
9259                         LPFC_NL_VENDOR_ID);
9260                 return;
9261         }
9262         if ((rspiocbp->iocb.ulpStatus == IOSTAT_NPORT_BSY) ||
9263                 (rspiocbp->iocb.ulpStatus == IOSTAT_FABRIC_BSY)) {
9264                 fabric_event.event_type = FC_REG_FABRIC_EVENT;
9265                 if (rspiocbp->iocb.ulpStatus == IOSTAT_NPORT_BSY)
9266                         fabric_event.subcategory = LPFC_EVENT_PORT_BUSY;
9267                 else
9268                         fabric_event.subcategory = LPFC_EVENT_FABRIC_BUSY;
9269                 memcpy(fabric_event.wwpn, &ndlp->nlp_portname,
9270                         sizeof(struct lpfc_name));
9271                 memcpy(fabric_event.wwnn, &ndlp->nlp_nodename,
9272                         sizeof(struct lpfc_name));
9273                 fc_host_post_vendor_event(shost,
9274                         fc_get_event_number(),
9275                         sizeof(fabric_event),
9276                         (char *)&fabric_event,
9277                         LPFC_NL_VENDOR_ID);
9278                 return;
9279         }
9280
9281 }
9282
9283 /**
9284  * lpfc_send_els_event - Posts unsolicited els event
9285  * @vport: Pointer to vport object.
9286  * @ndlp: Pointer FC node object.
9287  * @payload: ELS command code type.
9288  *
9289  * This function posts an event when there is an incoming
9290  * unsolicited ELS command.
9291  **/
9292 static void
9293 lpfc_send_els_event(struct lpfc_vport *vport,
9294                     struct lpfc_nodelist *ndlp,
9295                     uint32_t *payload)
9296 {
9297         struct lpfc_els_event_header *els_data = NULL;
9298         struct lpfc_logo_event *logo_data = NULL;
9299         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
9300
9301         if (*payload == ELS_CMD_LOGO) {
9302                 logo_data = kmalloc(sizeof(struct lpfc_logo_event), GFP_KERNEL);
9303                 if (!logo_data) {
9304                         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
9305                                 "0148 Failed to allocate memory "
9306                                 "for LOGO event\n");
9307                         return;
9308                 }
9309                 els_data = &logo_data->header;
9310         } else {
9311                 els_data = kmalloc(sizeof(struct lpfc_els_event_header),
9312                         GFP_KERNEL);
9313                 if (!els_data) {
9314                         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
9315                                 "0149 Failed to allocate memory "
9316                                 "for ELS event\n");
9317                         return;
9318                 }
9319         }
9320         els_data->event_type = FC_REG_ELS_EVENT;
9321         switch (*payload) {
9322         case ELS_CMD_PLOGI:
9323                 els_data->subcategory = LPFC_EVENT_PLOGI_RCV;
9324                 break;
9325         case ELS_CMD_PRLO:
9326                 els_data->subcategory = LPFC_EVENT_PRLO_RCV;
9327                 break;
9328         case ELS_CMD_ADISC:
9329                 els_data->subcategory = LPFC_EVENT_ADISC_RCV;
9330                 break;
9331         case ELS_CMD_LOGO:
9332                 els_data->subcategory = LPFC_EVENT_LOGO_RCV;
9333                 /* Copy the WWPN in the LOGO payload */
9334                 memcpy(logo_data->logo_wwpn, &payload[2],
9335                         sizeof(struct lpfc_name));
9336                 break;
9337         default:
9338                 kfree(els_data);
9339                 return;
9340         }
9341         memcpy(els_data->wwpn, &ndlp->nlp_portname, sizeof(struct lpfc_name));
9342         memcpy(els_data->wwnn, &ndlp->nlp_nodename, sizeof(struct lpfc_name));
9343         if (*payload == ELS_CMD_LOGO) {
9344                 fc_host_post_vendor_event(shost,
9345                         fc_get_event_number(),
9346                         sizeof(struct lpfc_logo_event),
9347                         (char *)logo_data,
9348                         LPFC_NL_VENDOR_ID);
9349                 kfree(logo_data);
9350         } else {
9351                 fc_host_post_vendor_event(shost,
9352                         fc_get_event_number(),
9353                         sizeof(struct lpfc_els_event_header),
9354                         (char *)els_data,
9355                         LPFC_NL_VENDOR_ID);
9356                 kfree(els_data);
9357         }
9358
9359         return;
9360 }
9361
9362
9363 DECLARE_ENUM2STR_LOOKUP(lpfc_get_fpin_li_event_nm, fc_fpin_li_event_types,
9364                         FC_FPIN_LI_EVT_TYPES_INIT);
9365
9366 DECLARE_ENUM2STR_LOOKUP(lpfc_get_fpin_deli_event_nm, fc_fpin_deli_event_types,
9367                         FC_FPIN_DELI_EVT_TYPES_INIT);
9368
9369 DECLARE_ENUM2STR_LOOKUP(lpfc_get_fpin_congn_event_nm, fc_fpin_congn_event_types,
9370                         FC_FPIN_CONGN_EVT_TYPES_INIT);
9371
9372 DECLARE_ENUM2STR_LOOKUP(lpfc_get_fpin_congn_severity_nm,
9373                         fc_fpin_congn_severity_types,
9374                         FC_FPIN_CONGN_SEVERITY_INIT);
9375
9376
9377 /**
9378  * lpfc_display_fpin_wwpn - Display WWPNs accessible by the attached port
9379  * @phba: Pointer to phba object.
9380  * @wwnlist: Pointer to list of WWPNs in FPIN payload
9381  * @cnt: count of WWPNs in FPIN payload
9382  *
9383  * This routine is called by LI and PC descriptors.
9384  * Limit the number of WWPNs displayed to 6 log messages, 6 per log message
9385  */
9386 static void
9387 lpfc_display_fpin_wwpn(struct lpfc_hba *phba, __be64 *wwnlist, u32 cnt)
9388 {
9389         char buf[LPFC_FPIN_WWPN_LINE_SZ];
9390         __be64 wwn;
9391         u64 wwpn;
9392         int i, len;
9393         int line = 0;
9394         int wcnt = 0;
9395         bool endit = false;
9396
9397         len = scnprintf(buf, LPFC_FPIN_WWPN_LINE_SZ, "Accessible WWPNs:");
9398         for (i = 0; i < cnt; i++) {
9399                 /* Are we on the last WWPN */
9400                 if (i == (cnt - 1))
9401                         endit = true;
9402
9403                 /* Extract the next WWPN from the payload */
9404                 wwn = *wwnlist++;
9405                 wwpn = be64_to_cpu(wwn);
9406                 len += scnprintf(buf + len, LPFC_FPIN_WWPN_LINE_SZ - len,
9407                                  " %016llx", wwpn);
9408
9409                 /* Log a message if we are on the last WWPN
9410                  * or if we hit the max allowed per message.
9411                  */
9412                 wcnt++;
9413                 if (wcnt == LPFC_FPIN_WWPN_LINE_CNT || endit) {
9414                         buf[len] = 0;
9415                         lpfc_printf_log(phba, KERN_INFO, LOG_ELS,
9416                                         "4686 %s\n", buf);
9417
9418                         /* Check if we reached the last WWPN */
9419                         if (endit)
9420                                 return;
9421
9422                         /* Limit the number of log message displayed per FPIN */
9423                         line++;
9424                         if (line == LPFC_FPIN_WWPN_NUM_LINE) {
9425                                 lpfc_printf_log(phba, KERN_INFO, LOG_ELS,
9426                                                 "4687 %d WWPNs Truncated\n",
9427                                                 cnt - i - 1);
9428                                 return;
9429                         }
9430
9431                         /* Start over with next log message */
9432                         wcnt = 0;
9433                         len = scnprintf(buf, LPFC_FPIN_WWPN_LINE_SZ,
9434                                         "Additional WWPNs:");
9435                 }
9436         }
9437 }
9438
9439 /**
9440  * lpfc_els_rcv_fpin_li - Process an FPIN Link Integrity Event.
9441  * @phba: Pointer to phba object.
9442  * @tlv:  Pointer to the Link Integrity Notification Descriptor.
9443  *
9444  * This function processes a Link Integrity FPIN event by logging a message.
9445  **/
9446 static void
9447 lpfc_els_rcv_fpin_li(struct lpfc_hba *phba, struct fc_tlv_desc *tlv)
9448 {
9449         struct fc_fn_li_desc *li = (struct fc_fn_li_desc *)tlv;
9450         const char *li_evt_str;
9451         u32 li_evt, cnt;
9452
9453         li_evt = be16_to_cpu(li->event_type);
9454         li_evt_str = lpfc_get_fpin_li_event_nm(li_evt);
9455         cnt = be32_to_cpu(li->pname_count);
9456
9457         lpfc_printf_log(phba, KERN_INFO, LOG_ELS,
9458                         "4680 FPIN Link Integrity %s (x%x) "
9459                         "Detecting PN x%016llx Attached PN x%016llx "
9460                         "Duration %d mSecs Count %d Port Cnt %d\n",
9461                         li_evt_str, li_evt,
9462                         be64_to_cpu(li->detecting_wwpn),
9463                         be64_to_cpu(li->attached_wwpn),
9464                         be32_to_cpu(li->event_threshold),
9465                         be32_to_cpu(li->event_count), cnt);
9466
9467         lpfc_display_fpin_wwpn(phba, (__be64 *)&li->pname_list, cnt);
9468 }
9469
9470 /**
9471  * lpfc_els_rcv_fpin_del - Process an FPIN Delivery Event.
9472  * @phba: Pointer to hba object.
9473  * @tlv:  Pointer to the Delivery Notification Descriptor TLV
9474  *
9475  * This function processes a Delivery FPIN event by logging a message.
9476  **/
9477 static void
9478 lpfc_els_rcv_fpin_del(struct lpfc_hba *phba, struct fc_tlv_desc *tlv)
9479 {
9480         struct fc_fn_deli_desc *del = (struct fc_fn_deli_desc *)tlv;
9481         const char *del_rsn_str;
9482         u32 del_rsn;
9483         __be32 *frame;
9484
9485         del_rsn = be16_to_cpu(del->deli_reason_code);
9486         del_rsn_str = lpfc_get_fpin_deli_event_nm(del_rsn);
9487
9488         /* Skip over desc_tag/desc_len header to payload */
9489         frame = (__be32 *)(del + 1);
9490
9491         lpfc_printf_log(phba, KERN_INFO, LOG_ELS,
9492                         "4681 FPIN Delivery %s (x%x) "
9493                         "Detecting PN x%016llx Attached PN x%016llx "
9494                         "DiscHdr0  x%08x "
9495                         "DiscHdr1 x%08x DiscHdr2 x%08x DiscHdr3 x%08x "
9496                         "DiscHdr4 x%08x DiscHdr5 x%08x\n",
9497                         del_rsn_str, del_rsn,
9498                         be64_to_cpu(del->detecting_wwpn),
9499                         be64_to_cpu(del->attached_wwpn),
9500                         be32_to_cpu(frame[0]),
9501                         be32_to_cpu(frame[1]),
9502                         be32_to_cpu(frame[2]),
9503                         be32_to_cpu(frame[3]),
9504                         be32_to_cpu(frame[4]),
9505                         be32_to_cpu(frame[5]));
9506 }
9507
9508 /**
9509  * lpfc_els_rcv_fpin_peer_cgn - Process a FPIN Peer Congestion Event.
9510  * @phba: Pointer to hba object.
9511  * @tlv:  Pointer to the Peer Congestion Notification Descriptor TLV
9512  *
9513  * This function processes a Peer Congestion FPIN event by logging a message.
9514  **/
9515 static void
9516 lpfc_els_rcv_fpin_peer_cgn(struct lpfc_hba *phba, struct fc_tlv_desc *tlv)
9517 {
9518         struct fc_fn_peer_congn_desc *pc = (struct fc_fn_peer_congn_desc *)tlv;
9519         const char *pc_evt_str;
9520         u32 pc_evt, cnt;
9521
9522         pc_evt = be16_to_cpu(pc->event_type);
9523         pc_evt_str = lpfc_get_fpin_congn_event_nm(pc_evt);
9524         cnt = be32_to_cpu(pc->pname_count);
9525
9526         lpfc_printf_log(phba, KERN_INFO, LOG_CGN_MGMT | LOG_ELS,
9527                         "4684 FPIN Peer Congestion %s (x%x) "
9528                         "Duration %d mSecs "
9529                         "Detecting PN x%016llx Attached PN x%016llx "
9530                         "Impacted Port Cnt %d\n",
9531                         pc_evt_str, pc_evt,
9532                         be32_to_cpu(pc->event_period),
9533                         be64_to_cpu(pc->detecting_wwpn),
9534                         be64_to_cpu(pc->attached_wwpn),
9535                         cnt);
9536
9537         lpfc_display_fpin_wwpn(phba, (__be64 *)&pc->pname_list, cnt);
9538 }
9539
9540 /**
9541  * lpfc_els_rcv_fpin_cgn - Process an FPIN Congestion notification
9542  * @phba: Pointer to hba object.
9543  * @tlv:  Pointer to the Congestion Notification Descriptor TLV
9544  *
9545  * This function processes an FPIN Congestion Notifiction.  The notification
9546  * could be an Alarm or Warning.  This routine feeds that data into driver's
9547  * running congestion algorithm. It also processes the FPIN by
9548  * logging a message. It returns 1 to indicate deliver this message
9549  * to the upper layer or 0 to indicate don't deliver it.
9550  **/
9551 static int
9552 lpfc_els_rcv_fpin_cgn(struct lpfc_hba *phba, struct fc_tlv_desc *tlv)
9553 {
9554         struct lpfc_cgn_info *cp;
9555         struct fc_fn_congn_desc *cgn = (struct fc_fn_congn_desc *)tlv;
9556         const char *cgn_evt_str;
9557         u32 cgn_evt;
9558         const char *cgn_sev_str;
9559         u32 cgn_sev;
9560         uint16_t value;
9561         u32 crc;
9562         bool nm_log = false;
9563         int rc = 1;
9564
9565         cgn_evt = be16_to_cpu(cgn->event_type);
9566         cgn_evt_str = lpfc_get_fpin_congn_event_nm(cgn_evt);
9567         cgn_sev = cgn->severity;
9568         cgn_sev_str = lpfc_get_fpin_congn_severity_nm(cgn_sev);
9569
9570         /* The driver only takes action on a Credit Stall or Oversubscription
9571          * event type to engage the IO algorithm.  The driver prints an
9572          * unmaskable message only for Lost Credit and Credit Stall.
9573          * TODO: Still need to have definition of host action on clear,
9574          *       lost credit and device specific event types.
9575          */
9576         switch (cgn_evt) {
9577         case FPIN_CONGN_LOST_CREDIT:
9578                 nm_log = true;
9579                 break;
9580         case FPIN_CONGN_CREDIT_STALL:
9581                 nm_log = true;
9582                 fallthrough;
9583         case FPIN_CONGN_OVERSUBSCRIPTION:
9584                 if (cgn_evt == FPIN_CONGN_OVERSUBSCRIPTION)
9585                         nm_log = false;
9586                 switch (cgn_sev) {
9587                 case FPIN_CONGN_SEVERITY_ERROR:
9588                         /* Take action here for an Alarm event */
9589                         if (phba->cmf_active_mode != LPFC_CFG_OFF) {
9590                                 if (phba->cgn_reg_fpin & LPFC_CGN_FPIN_ALARM) {
9591                                         /* Track of alarm cnt for cgn_info */
9592                                         atomic_inc(&phba->cgn_fabric_alarm_cnt);
9593                                         /* Track of alarm cnt for SYNC_WQE */
9594                                         atomic_inc(&phba->cgn_sync_alarm_cnt);
9595                                 }
9596                                 goto cleanup;
9597                         }
9598                         break;
9599                 case FPIN_CONGN_SEVERITY_WARNING:
9600                         /* Take action here for a Warning event */
9601                         if (phba->cmf_active_mode != LPFC_CFG_OFF) {
9602                                 if (phba->cgn_reg_fpin & LPFC_CGN_FPIN_WARN) {
9603                                         /* Track of warning cnt for cgn_info */
9604                                         atomic_inc(&phba->cgn_fabric_warn_cnt);
9605                                         /* Track of warning cnt for SYNC_WQE */
9606                                         atomic_inc(&phba->cgn_sync_warn_cnt);
9607                                 }
9608 cleanup:
9609                                 /* Save frequency in ms */
9610                                 phba->cgn_fpin_frequency =
9611                                         be32_to_cpu(cgn->event_period);
9612                                 value = phba->cgn_fpin_frequency;
9613                                 if (phba->cgn_i) {
9614                                         cp = (struct lpfc_cgn_info *)
9615                                                 phba->cgn_i->virt;
9616                                         if (phba->cgn_reg_fpin &
9617                                                 LPFC_CGN_FPIN_ALARM)
9618                                                 cp->cgn_alarm_freq =
9619                                                         cpu_to_le16(value);
9620                                         if (phba->cgn_reg_fpin &
9621                                                 LPFC_CGN_FPIN_WARN)
9622                                                 cp->cgn_warn_freq =
9623                                                         cpu_to_le16(value);
9624                                         crc = lpfc_cgn_calc_crc32
9625                                                 (cp,
9626                                                 LPFC_CGN_INFO_SZ,
9627                                                 LPFC_CGN_CRC32_SEED);
9628                                         cp->cgn_info_crc = cpu_to_le32(crc);
9629                                 }
9630
9631                                 /* Don't deliver to upper layer since
9632                                  * driver took action on this tlv.
9633                                  */
9634                                 rc = 0;
9635                         }
9636                         break;
9637                 }
9638                 break;
9639         }
9640
9641         /* Change the log level to unmaskable for the following event types. */
9642         lpfc_printf_log(phba, (nm_log ? KERN_WARNING : KERN_INFO),
9643                         LOG_CGN_MGMT | LOG_ELS,
9644                         "4683 FPIN CONGESTION %s type %s (x%x) Event "
9645                         "Duration %d mSecs\n",
9646                         cgn_sev_str, cgn_evt_str, cgn_evt,
9647                         be32_to_cpu(cgn->event_period));
9648         return rc;
9649 }
9650
9651 void
9652 lpfc_els_rcv_fpin(struct lpfc_vport *vport, void *p, u32 fpin_length)
9653 {
9654         struct lpfc_hba *phba = vport->phba;
9655         struct fc_els_fpin *fpin = (struct fc_els_fpin *)p;
9656         struct fc_tlv_desc *tlv, *first_tlv, *current_tlv;
9657         const char *dtag_nm;
9658         int desc_cnt = 0, bytes_remain, cnt;
9659         u32 dtag, deliver = 0;
9660         int len;
9661
9662         /* FPINs handled only if we are in the right discovery state */
9663         if (vport->port_state < LPFC_DISC_AUTH)
9664                 return;
9665
9666         /* make sure there is the full fpin header */
9667         if (fpin_length < sizeof(struct fc_els_fpin))
9668                 return;
9669
9670         /* Sanity check descriptor length. The desc_len value does not
9671          * include space for the ELS command and the desc_len fields.
9672          */
9673         len = be32_to_cpu(fpin->desc_len);
9674         if (fpin_length < len + sizeof(struct fc_els_fpin)) {
9675                 lpfc_printf_log(phba, KERN_WARNING, LOG_CGN_MGMT,
9676                                 "4671 Bad ELS FPIN length %d: %d\n",
9677                                 len, fpin_length);
9678                 return;
9679         }
9680
9681         tlv = (struct fc_tlv_desc *)&fpin->fpin_desc[0];
9682         first_tlv = tlv;
9683         bytes_remain = fpin_length - offsetof(struct fc_els_fpin, fpin_desc);
9684         bytes_remain = min_t(u32, bytes_remain, be32_to_cpu(fpin->desc_len));
9685
9686         /* process each descriptor separately */
9687         while (bytes_remain >= FC_TLV_DESC_HDR_SZ &&
9688                bytes_remain >= FC_TLV_DESC_SZ_FROM_LENGTH(tlv)) {
9689                 dtag = be32_to_cpu(tlv->desc_tag);
9690                 switch (dtag) {
9691                 case ELS_DTAG_LNK_INTEGRITY:
9692                         lpfc_els_rcv_fpin_li(phba, tlv);
9693                         deliver = 1;
9694                         break;
9695                 case ELS_DTAG_DELIVERY:
9696                         lpfc_els_rcv_fpin_del(phba, tlv);
9697                         deliver = 1;
9698                         break;
9699                 case ELS_DTAG_PEER_CONGEST:
9700                         lpfc_els_rcv_fpin_peer_cgn(phba, tlv);
9701                         deliver = 1;
9702                         break;
9703                 case ELS_DTAG_CONGESTION:
9704                         deliver = lpfc_els_rcv_fpin_cgn(phba, tlv);
9705                         break;
9706                 default:
9707                         dtag_nm = lpfc_get_tlv_dtag_nm(dtag);
9708                         lpfc_printf_log(phba, KERN_WARNING, LOG_CGN_MGMT,
9709                                         "4678 unknown FPIN descriptor[%d]: "
9710                                         "tag x%x (%s)\n",
9711                                         desc_cnt, dtag, dtag_nm);
9712
9713                         /* If descriptor is bad, drop the rest of the data */
9714                         return;
9715                 }
9716                 lpfc_cgn_update_stat(phba, dtag);
9717                 cnt = be32_to_cpu(tlv->desc_len);
9718
9719                 /* Sanity check descriptor length. The desc_len value does not
9720                  * include space for the desc_tag and the desc_len fields.
9721                  */
9722                 len -= (cnt + sizeof(struct fc_tlv_desc));
9723                 if (len < 0) {
9724                         dtag_nm = lpfc_get_tlv_dtag_nm(dtag);
9725                         lpfc_printf_log(phba, KERN_WARNING, LOG_CGN_MGMT,
9726                                         "4672 Bad FPIN descriptor TLV length "
9727                                         "%d: %d %d %s\n",
9728                                         cnt, len, fpin_length, dtag_nm);
9729                         return;
9730                 }
9731
9732                 current_tlv = tlv;
9733                 bytes_remain -= FC_TLV_DESC_SZ_FROM_LENGTH(tlv);
9734                 tlv = fc_tlv_next_desc(tlv);
9735
9736                 /* Format payload such that the FPIN delivered to the
9737                  * upper layer is a single descriptor FPIN.
9738                  */
9739                 if (desc_cnt)
9740                         memcpy(first_tlv, current_tlv,
9741                                (cnt + sizeof(struct fc_els_fpin)));
9742
9743                 /* Adjust the length so that it only reflects a
9744                  * single descriptor FPIN.
9745                  */
9746                 fpin_length = cnt + sizeof(struct fc_els_fpin);
9747                 fpin->desc_len = cpu_to_be32(fpin_length);
9748                 fpin_length += sizeof(struct fc_els_fpin); /* the entire FPIN */
9749
9750                 /* Send every descriptor individually to the upper layer */
9751                 if (deliver)
9752                         fc_host_fpin_rcv(lpfc_shost_from_vport(vport),
9753                                          fpin_length, (char *)fpin);
9754                 desc_cnt++;
9755         }
9756 }
9757
9758 /**
9759  * lpfc_els_unsol_buffer - Process an unsolicited event data buffer
9760  * @phba: pointer to lpfc hba data structure.
9761  * @pring: pointer to a SLI ring.
9762  * @vport: pointer to a host virtual N_Port data structure.
9763  * @elsiocb: pointer to lpfc els command iocb data structure.
9764  *
9765  * This routine is used for processing the IOCB associated with a unsolicited
9766  * event. It first determines whether there is an existing ndlp that matches
9767  * the DID from the unsolicited IOCB. If not, it will create a new one with
9768  * the DID from the unsolicited IOCB. The ELS command from the unsolicited
9769  * IOCB is then used to invoke the proper routine and to set up proper state
9770  * of the discovery state machine.
9771  **/
9772 static void
9773 lpfc_els_unsol_buffer(struct lpfc_hba *phba, struct lpfc_sli_ring *pring,
9774                       struct lpfc_vport *vport, struct lpfc_iocbq *elsiocb)
9775 {
9776         struct lpfc_nodelist *ndlp;
9777         struct ls_rjt stat;
9778         uint32_t *payload, payload_len;
9779         uint32_t cmd, did, newnode;
9780         uint8_t rjt_exp, rjt_err = 0, init_link = 0;
9781         IOCB_t *icmd = &elsiocb->iocb;
9782         LPFC_MBOXQ_t *mbox;
9783
9784         if (!vport || !(elsiocb->context2))
9785                 goto dropit;
9786
9787         newnode = 0;
9788         payload = ((struct lpfc_dmabuf *)elsiocb->context2)->virt;
9789         payload_len = elsiocb->iocb.unsli3.rcvsli3.acc_len;
9790         cmd = *payload;
9791         if ((phba->sli3_options & LPFC_SLI3_HBQ_ENABLED) == 0)
9792                 lpfc_post_buffer(phba, pring, 1);
9793
9794         did = icmd->un.rcvels.remoteID;
9795         if (icmd->ulpStatus) {
9796                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
9797                         "RCV Unsol ELS:  status:x%x/x%x did:x%x",
9798                         icmd->ulpStatus, icmd->un.ulpWord[4], did);
9799                 goto dropit;
9800         }
9801
9802         /* Check to see if link went down during discovery */
9803         if (lpfc_els_chk_latt(vport))
9804                 goto dropit;
9805
9806         /* Ignore traffic received during vport shutdown. */
9807         if (vport->load_flag & FC_UNLOADING)
9808                 goto dropit;
9809
9810         /* If NPort discovery is delayed drop incoming ELS */
9811         if ((vport->fc_flag & FC_DISC_DELAYED) &&
9812                         (cmd != ELS_CMD_PLOGI))
9813                 goto dropit;
9814
9815         ndlp = lpfc_findnode_did(vport, did);
9816         if (!ndlp) {
9817                 /* Cannot find existing Fabric ndlp, so allocate a new one */
9818                 ndlp = lpfc_nlp_init(vport, did);
9819                 if (!ndlp)
9820                         goto dropit;
9821                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
9822                 newnode = 1;
9823                 if ((did & Fabric_DID_MASK) == Fabric_DID_MASK)
9824                         ndlp->nlp_type |= NLP_FABRIC;
9825         } else if (ndlp->nlp_state == NLP_STE_UNUSED_NODE) {
9826                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
9827                 newnode = 1;
9828         }
9829
9830         phba->fc_stat.elsRcvFrame++;
9831
9832         /*
9833          * Do not process any unsolicited ELS commands
9834          * if the ndlp is in DEV_LOSS
9835          */
9836         spin_lock_irq(&ndlp->lock);
9837         if (ndlp->nlp_flag & NLP_IN_DEV_LOSS) {
9838                 spin_unlock_irq(&ndlp->lock);
9839                 if (newnode)
9840                         lpfc_nlp_put(ndlp);
9841                 goto dropit;
9842         }
9843         spin_unlock_irq(&ndlp->lock);
9844
9845         elsiocb->context1 = lpfc_nlp_get(ndlp);
9846         if (!elsiocb->context1)
9847                 goto dropit;
9848         elsiocb->vport = vport;
9849
9850         if ((cmd & ELS_CMD_MASK) == ELS_CMD_RSCN) {
9851                 cmd &= ELS_CMD_MASK;
9852         }
9853         /* ELS command <elsCmd> received from NPORT <did> */
9854         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
9855                          "0112 ELS command x%x received from NPORT x%x "
9856                          "refcnt %d Data: x%x x%x x%x x%x\n",
9857                          cmd, did, kref_read(&ndlp->kref), vport->port_state,
9858                          vport->fc_flag, vport->fc_myDID, vport->fc_prevDID);
9859
9860         /* reject till our FLOGI completes or PLOGI assigned DID via PT2PT */
9861         if ((vport->port_state < LPFC_FABRIC_CFG_LINK) &&
9862             (cmd != ELS_CMD_FLOGI) &&
9863             !((cmd == ELS_CMD_PLOGI) && (vport->fc_flag & FC_PT2PT))) {
9864                 rjt_err = LSRJT_LOGICAL_BSY;
9865                 rjt_exp = LSEXP_NOTHING_MORE;
9866                 goto lsrjt;
9867         }
9868
9869         switch (cmd) {
9870         case ELS_CMD_PLOGI:
9871                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
9872                         "RCV PLOGI:       did:x%x/ste:x%x flg:x%x",
9873                         did, vport->port_state, ndlp->nlp_flag);
9874
9875                 phba->fc_stat.elsRcvPLOGI++;
9876                 ndlp = lpfc_plogi_confirm_nport(phba, payload, ndlp);
9877                 if (phba->sli_rev == LPFC_SLI_REV4 &&
9878                     (phba->pport->fc_flag & FC_PT2PT)) {
9879                         vport->fc_prevDID = vport->fc_myDID;
9880                         /* Our DID needs to be updated before registering
9881                          * the vfi. This is done in lpfc_rcv_plogi but
9882                          * that is called after the reg_vfi.
9883                          */
9884                         vport->fc_myDID = elsiocb->iocb.un.rcvels.parmRo;
9885                         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
9886                                          "3312 Remote port assigned DID x%x "
9887                                          "%x\n", vport->fc_myDID,
9888                                          vport->fc_prevDID);
9889                 }
9890
9891                 lpfc_send_els_event(vport, ndlp, payload);
9892
9893                 /* If Nport discovery is delayed, reject PLOGIs */
9894                 if (vport->fc_flag & FC_DISC_DELAYED) {
9895                         rjt_err = LSRJT_UNABLE_TPC;
9896                         rjt_exp = LSEXP_NOTHING_MORE;
9897                         break;
9898                 }
9899
9900                 if (vport->port_state < LPFC_DISC_AUTH) {
9901                         if (!(phba->pport->fc_flag & FC_PT2PT) ||
9902                                 (phba->pport->fc_flag & FC_PT2PT_PLOGI)) {
9903                                 rjt_err = LSRJT_UNABLE_TPC;
9904                                 rjt_exp = LSEXP_NOTHING_MORE;
9905                                 break;
9906                         }
9907                 }
9908
9909                 spin_lock_irq(&ndlp->lock);
9910                 ndlp->nlp_flag &= ~NLP_TARGET_REMOVE;
9911                 spin_unlock_irq(&ndlp->lock);
9912
9913                 lpfc_disc_state_machine(vport, ndlp, elsiocb,
9914                                         NLP_EVT_RCV_PLOGI);
9915
9916                 break;
9917         case ELS_CMD_FLOGI:
9918                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
9919                         "RCV FLOGI:       did:x%x/ste:x%x flg:x%x",
9920                         did, vport->port_state, ndlp->nlp_flag);
9921
9922                 phba->fc_stat.elsRcvFLOGI++;
9923
9924                 /* If the driver believes fabric discovery is done and is ready,
9925                  * bounce the link.  There is some descrepancy.
9926                  */
9927                 if (vport->port_state >= LPFC_LOCAL_CFG_LINK &&
9928                     vport->fc_flag & FC_PT2PT &&
9929                     vport->rcv_flogi_cnt >= 1) {
9930                         rjt_err = LSRJT_LOGICAL_BSY;
9931                         rjt_exp = LSEXP_NOTHING_MORE;
9932                         init_link++;
9933                         goto lsrjt;
9934                 }
9935
9936                 lpfc_els_rcv_flogi(vport, elsiocb, ndlp);
9937                 if (newnode)
9938                         lpfc_disc_state_machine(vport, ndlp, NULL,
9939                                         NLP_EVT_DEVICE_RM);
9940                 break;
9941         case ELS_CMD_LOGO:
9942                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
9943                         "RCV LOGO:        did:x%x/ste:x%x flg:x%x",
9944                         did, vport->port_state, ndlp->nlp_flag);
9945
9946                 phba->fc_stat.elsRcvLOGO++;
9947                 lpfc_send_els_event(vport, ndlp, payload);
9948                 if (vport->port_state < LPFC_DISC_AUTH) {
9949                         rjt_err = LSRJT_UNABLE_TPC;
9950                         rjt_exp = LSEXP_NOTHING_MORE;
9951                         break;
9952                 }
9953                 lpfc_disc_state_machine(vport, ndlp, elsiocb, NLP_EVT_RCV_LOGO);
9954                 if (newnode)
9955                         lpfc_disc_state_machine(vport, ndlp, NULL,
9956                                         NLP_EVT_DEVICE_RM);
9957                 break;
9958         case ELS_CMD_PRLO:
9959                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
9960                         "RCV PRLO:        did:x%x/ste:x%x flg:x%x",
9961                         did, vport->port_state, ndlp->nlp_flag);
9962
9963                 phba->fc_stat.elsRcvPRLO++;
9964                 lpfc_send_els_event(vport, ndlp, payload);
9965                 if (vport->port_state < LPFC_DISC_AUTH) {
9966                         rjt_err = LSRJT_UNABLE_TPC;
9967                         rjt_exp = LSEXP_NOTHING_MORE;
9968                         break;
9969                 }
9970                 lpfc_disc_state_machine(vport, ndlp, elsiocb, NLP_EVT_RCV_PRLO);
9971                 break;
9972         case ELS_CMD_LCB:
9973                 phba->fc_stat.elsRcvLCB++;
9974                 lpfc_els_rcv_lcb(vport, elsiocb, ndlp);
9975                 break;
9976         case ELS_CMD_RDP:
9977                 phba->fc_stat.elsRcvRDP++;
9978                 lpfc_els_rcv_rdp(vport, elsiocb, ndlp);
9979                 break;
9980         case ELS_CMD_RSCN:
9981                 phba->fc_stat.elsRcvRSCN++;
9982                 lpfc_els_rcv_rscn(vport, elsiocb, ndlp);
9983                 if (newnode)
9984                         lpfc_disc_state_machine(vport, ndlp, NULL,
9985                                         NLP_EVT_DEVICE_RM);
9986                 break;
9987         case ELS_CMD_ADISC:
9988                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
9989                         "RCV ADISC:       did:x%x/ste:x%x flg:x%x",
9990                         did, vport->port_state, ndlp->nlp_flag);
9991
9992                 lpfc_send_els_event(vport, ndlp, payload);
9993                 phba->fc_stat.elsRcvADISC++;
9994                 if (vport->port_state < LPFC_DISC_AUTH) {
9995                         rjt_err = LSRJT_UNABLE_TPC;
9996                         rjt_exp = LSEXP_NOTHING_MORE;
9997                         break;
9998                 }
9999                 lpfc_disc_state_machine(vport, ndlp, elsiocb,
10000                                         NLP_EVT_RCV_ADISC);
10001                 break;
10002         case ELS_CMD_PDISC:
10003                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10004                         "RCV PDISC:       did:x%x/ste:x%x flg:x%x",
10005                         did, vport->port_state, ndlp->nlp_flag);
10006
10007                 phba->fc_stat.elsRcvPDISC++;
10008                 if (vport->port_state < LPFC_DISC_AUTH) {
10009                         rjt_err = LSRJT_UNABLE_TPC;
10010                         rjt_exp = LSEXP_NOTHING_MORE;
10011                         break;
10012                 }
10013                 lpfc_disc_state_machine(vport, ndlp, elsiocb,
10014                                         NLP_EVT_RCV_PDISC);
10015                 break;
10016         case ELS_CMD_FARPR:
10017                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10018                         "RCV FARPR:       did:x%x/ste:x%x flg:x%x",
10019                         did, vport->port_state, ndlp->nlp_flag);
10020
10021                 phba->fc_stat.elsRcvFARPR++;
10022                 lpfc_els_rcv_farpr(vport, elsiocb, ndlp);
10023                 break;
10024         case ELS_CMD_FARP:
10025                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10026                         "RCV FARP:        did:x%x/ste:x%x flg:x%x",
10027                         did, vport->port_state, ndlp->nlp_flag);
10028
10029                 phba->fc_stat.elsRcvFARP++;
10030                 lpfc_els_rcv_farp(vport, elsiocb, ndlp);
10031                 break;
10032         case ELS_CMD_FAN:
10033                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10034                         "RCV FAN:         did:x%x/ste:x%x flg:x%x",
10035                         did, vport->port_state, ndlp->nlp_flag);
10036
10037                 phba->fc_stat.elsRcvFAN++;
10038                 lpfc_els_rcv_fan(vport, elsiocb, ndlp);
10039                 break;
10040         case ELS_CMD_PRLI:
10041         case ELS_CMD_NVMEPRLI:
10042                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10043                         "RCV PRLI:        did:x%x/ste:x%x flg:x%x",
10044                         did, vport->port_state, ndlp->nlp_flag);
10045
10046                 phba->fc_stat.elsRcvPRLI++;
10047                 if ((vport->port_state < LPFC_DISC_AUTH) &&
10048                     (vport->fc_flag & FC_FABRIC)) {
10049                         rjt_err = LSRJT_UNABLE_TPC;
10050                         rjt_exp = LSEXP_NOTHING_MORE;
10051                         break;
10052                 }
10053                 lpfc_disc_state_machine(vport, ndlp, elsiocb, NLP_EVT_RCV_PRLI);
10054                 break;
10055         case ELS_CMD_LIRR:
10056                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10057                         "RCV LIRR:        did:x%x/ste:x%x flg:x%x",
10058                         did, vport->port_state, ndlp->nlp_flag);
10059
10060                 phba->fc_stat.elsRcvLIRR++;
10061                 lpfc_els_rcv_lirr(vport, elsiocb, ndlp);
10062                 if (newnode)
10063                         lpfc_disc_state_machine(vport, ndlp, NULL,
10064                                         NLP_EVT_DEVICE_RM);
10065                 break;
10066         case ELS_CMD_RLS:
10067                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10068                         "RCV RLS:         did:x%x/ste:x%x flg:x%x",
10069                         did, vport->port_state, ndlp->nlp_flag);
10070
10071                 phba->fc_stat.elsRcvRLS++;
10072                 lpfc_els_rcv_rls(vport, elsiocb, ndlp);
10073                 if (newnode)
10074                         lpfc_disc_state_machine(vport, ndlp, NULL,
10075                                         NLP_EVT_DEVICE_RM);
10076                 break;
10077         case ELS_CMD_RPL:
10078                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10079                         "RCV RPL:         did:x%x/ste:x%x flg:x%x",
10080                         did, vport->port_state, ndlp->nlp_flag);
10081
10082                 phba->fc_stat.elsRcvRPL++;
10083                 lpfc_els_rcv_rpl(vport, elsiocb, ndlp);
10084                 if (newnode)
10085                         lpfc_disc_state_machine(vport, ndlp, NULL,
10086                                         NLP_EVT_DEVICE_RM);
10087                 break;
10088         case ELS_CMD_RNID:
10089                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10090                         "RCV RNID:        did:x%x/ste:x%x flg:x%x",
10091                         did, vport->port_state, ndlp->nlp_flag);
10092
10093                 phba->fc_stat.elsRcvRNID++;
10094                 lpfc_els_rcv_rnid(vport, elsiocb, ndlp);
10095                 if (newnode)
10096                         lpfc_disc_state_machine(vport, ndlp, NULL,
10097                                         NLP_EVT_DEVICE_RM);
10098                 break;
10099         case ELS_CMD_RTV:
10100                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10101                         "RCV RTV:        did:x%x/ste:x%x flg:x%x",
10102                         did, vport->port_state, ndlp->nlp_flag);
10103                 phba->fc_stat.elsRcvRTV++;
10104                 lpfc_els_rcv_rtv(vport, elsiocb, ndlp);
10105                 if (newnode)
10106                         lpfc_disc_state_machine(vport, ndlp, NULL,
10107                                         NLP_EVT_DEVICE_RM);
10108                 break;
10109         case ELS_CMD_RRQ:
10110                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10111                         "RCV RRQ:         did:x%x/ste:x%x flg:x%x",
10112                         did, vport->port_state, ndlp->nlp_flag);
10113
10114                 phba->fc_stat.elsRcvRRQ++;
10115                 lpfc_els_rcv_rrq(vport, elsiocb, ndlp);
10116                 if (newnode)
10117                         lpfc_disc_state_machine(vport, ndlp, NULL,
10118                                         NLP_EVT_DEVICE_RM);
10119                 break;
10120         case ELS_CMD_ECHO:
10121                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10122                         "RCV ECHO:        did:x%x/ste:x%x flg:x%x",
10123                         did, vport->port_state, ndlp->nlp_flag);
10124
10125                 phba->fc_stat.elsRcvECHO++;
10126                 lpfc_els_rcv_echo(vport, elsiocb, ndlp);
10127                 if (newnode)
10128                         lpfc_disc_state_machine(vport, ndlp, NULL,
10129                                         NLP_EVT_DEVICE_RM);
10130                 break;
10131         case ELS_CMD_REC:
10132                 /* receive this due to exchange closed */
10133                 rjt_err = LSRJT_UNABLE_TPC;
10134                 rjt_exp = LSEXP_INVALID_OX_RX;
10135                 break;
10136         case ELS_CMD_FPIN:
10137                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10138                                       "RCV FPIN:       did:x%x/ste:x%x flg:x%x",
10139                                       did, vport->port_state, ndlp->nlp_flag);
10140
10141                 lpfc_els_rcv_fpin(vport, (struct fc_els_fpin *)payload,
10142                                   payload_len);
10143
10144                 /* There are no replies, so no rjt codes */
10145                 break;
10146         case ELS_CMD_EDC:
10147                 lpfc_els_rcv_edc(vport, elsiocb, ndlp);
10148                 break;
10149         case ELS_CMD_RDF:
10150                 phba->fc_stat.elsRcvRDF++;
10151                 /* Accept RDF only from fabric controller */
10152                 if (did != Fabric_Cntl_DID) {
10153                         lpfc_printf_vlog(vport, KERN_WARNING, LOG_ELS,
10154                                          "1115 Received RDF from invalid DID "
10155                                          "x%x\n", did);
10156                         rjt_err = LSRJT_PROTOCOL_ERR;
10157                         rjt_exp = LSEXP_NOTHING_MORE;
10158                         goto lsrjt;
10159                 }
10160
10161                 lpfc_els_rcv_rdf(vport, elsiocb, ndlp);
10162                 break;
10163         default:
10164                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10165                         "RCV ELS cmd:     cmd:x%x did:x%x/ste:x%x",
10166                         cmd, did, vport->port_state);
10167
10168                 /* Unsupported ELS command, reject */
10169                 rjt_err = LSRJT_CMD_UNSUPPORTED;
10170                 rjt_exp = LSEXP_NOTHING_MORE;
10171
10172                 /* Unknown ELS command <elsCmd> received from NPORT <did> */
10173                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
10174                                  "0115 Unknown ELS command x%x "
10175                                  "received from NPORT x%x\n", cmd, did);
10176                 if (newnode)
10177                         lpfc_disc_state_machine(vport, ndlp, NULL,
10178                                         NLP_EVT_DEVICE_RM);
10179                 break;
10180         }
10181
10182 lsrjt:
10183         /* check if need to LS_RJT received ELS cmd */
10184         if (rjt_err) {
10185                 memset(&stat, 0, sizeof(stat));
10186                 stat.un.b.lsRjtRsnCode = rjt_err;
10187                 stat.un.b.lsRjtRsnCodeExp = rjt_exp;
10188                 lpfc_els_rsp_reject(vport, stat.un.lsRjtError, elsiocb, ndlp,
10189                                     NULL);
10190                 /* Remove the reference from above for new nodes. */
10191                 if (newnode)
10192                         lpfc_disc_state_machine(vport, ndlp, NULL,
10193                                         NLP_EVT_DEVICE_RM);
10194         }
10195
10196         /* Release the reference on this elsiocb, not the ndlp. */
10197         lpfc_nlp_put(elsiocb->context1);
10198         elsiocb->context1 = NULL;
10199
10200         /* Special case.  Driver received an unsolicited command that
10201          * unsupportable given the driver's current state.  Reset the
10202          * link and start over.
10203          */
10204         if (init_link) {
10205                 mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
10206                 if (!mbox)
10207                         return;
10208                 lpfc_linkdown(phba);
10209                 lpfc_init_link(phba, mbox,
10210                                phba->cfg_topology,
10211                                phba->cfg_link_speed);
10212                 mbox->u.mb.un.varInitLnk.lipsr_AL_PA = 0;
10213                 mbox->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
10214                 mbox->vport = vport;
10215                 if (lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT) ==
10216                     MBX_NOT_FINISHED)
10217                         mempool_free(mbox, phba->mbox_mem_pool);
10218         }
10219
10220         return;
10221
10222 dropit:
10223         if (vport && !(vport->load_flag & FC_UNLOADING))
10224                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
10225                         "0111 Dropping received ELS cmd "
10226                         "Data: x%x x%x x%x\n",
10227                         icmd->ulpStatus, icmd->un.ulpWord[4], icmd->ulpTimeout);
10228         phba->fc_stat.elsRcvDrop++;
10229 }
10230
10231 /**
10232  * lpfc_els_unsol_event - Process an unsolicited event from an els sli ring
10233  * @phba: pointer to lpfc hba data structure.
10234  * @pring: pointer to a SLI ring.
10235  * @elsiocb: pointer to lpfc els iocb data structure.
10236  *
10237  * This routine is used to process an unsolicited event received from a SLI
10238  * (Service Level Interface) ring. The actual processing of the data buffer
10239  * associated with the unsolicited event is done by invoking the routine
10240  * lpfc_els_unsol_buffer() after properly set up the iocb buffer from the
10241  * SLI ring on which the unsolicited event was received.
10242  **/
10243 void
10244 lpfc_els_unsol_event(struct lpfc_hba *phba, struct lpfc_sli_ring *pring,
10245                      struct lpfc_iocbq *elsiocb)
10246 {
10247         struct lpfc_vport *vport = phba->pport;
10248         IOCB_t *icmd = &elsiocb->iocb;
10249         dma_addr_t paddr;
10250         struct lpfc_dmabuf *bdeBuf1 = elsiocb->context2;
10251         struct lpfc_dmabuf *bdeBuf2 = elsiocb->context3;
10252
10253         elsiocb->context1 = NULL;
10254         elsiocb->context2 = NULL;
10255         elsiocb->context3 = NULL;
10256
10257         if (icmd->ulpStatus == IOSTAT_NEED_BUFFER) {
10258                 lpfc_sli_hbqbuf_add_hbqs(phba, LPFC_ELS_HBQ);
10259         } else if (icmd->ulpStatus == IOSTAT_LOCAL_REJECT &&
10260                    (icmd->un.ulpWord[4] & IOERR_PARAM_MASK) ==
10261                    IOERR_RCV_BUFFER_WAITING) {
10262                 phba->fc_stat.NoRcvBuf++;
10263                 /* Not enough posted buffers; Try posting more buffers */
10264                 if (!(phba->sli3_options & LPFC_SLI3_HBQ_ENABLED))
10265                         lpfc_post_buffer(phba, pring, 0);
10266                 return;
10267         }
10268
10269         if ((phba->sli3_options & LPFC_SLI3_NPIV_ENABLED) &&
10270             (icmd->ulpCommand == CMD_IOCB_RCV_ELS64_CX ||
10271              icmd->ulpCommand == CMD_IOCB_RCV_SEQ64_CX)) {
10272                 if (icmd->unsli3.rcvsli3.vpi == 0xffff)
10273                         vport = phba->pport;
10274                 else
10275                         vport = lpfc_find_vport_by_vpid(phba,
10276                                                 icmd->unsli3.rcvsli3.vpi);
10277         }
10278
10279         /* If there are no BDEs associated
10280          * with this IOCB, there is nothing to do.
10281          */
10282         if (icmd->ulpBdeCount == 0)
10283                 return;
10284
10285         /* type of ELS cmd is first 32bit word
10286          * in packet
10287          */
10288         if (phba->sli3_options & LPFC_SLI3_HBQ_ENABLED) {
10289                 elsiocb->context2 = bdeBuf1;
10290         } else {
10291                 paddr = getPaddr(icmd->un.cont64[0].addrHigh,
10292                                  icmd->un.cont64[0].addrLow);
10293                 elsiocb->context2 = lpfc_sli_ringpostbuf_get(phba, pring,
10294                                                              paddr);
10295         }
10296
10297         lpfc_els_unsol_buffer(phba, pring, vport, elsiocb);
10298         /*
10299          * The different unsolicited event handlers would tell us
10300          * if they are done with "mp" by setting context2 to NULL.
10301          */
10302         if (elsiocb->context2) {
10303                 lpfc_in_buf_free(phba, (struct lpfc_dmabuf *)elsiocb->context2);
10304                 elsiocb->context2 = NULL;
10305         }
10306
10307         /* RCV_ELS64_CX provide for 2 BDEs - process 2nd if included */
10308         if ((phba->sli3_options & LPFC_SLI3_HBQ_ENABLED) &&
10309             icmd->ulpBdeCount == 2) {
10310                 elsiocb->context2 = bdeBuf2;
10311                 lpfc_els_unsol_buffer(phba, pring, vport, elsiocb);
10312                 /* free mp if we are done with it */
10313                 if (elsiocb->context2) {
10314                         lpfc_in_buf_free(phba, elsiocb->context2);
10315                         elsiocb->context2 = NULL;
10316                 }
10317         }
10318 }
10319
10320 static void
10321 lpfc_start_fdmi(struct lpfc_vport *vport)
10322 {
10323         struct lpfc_nodelist *ndlp;
10324
10325         /* If this is the first time, allocate an ndlp and initialize
10326          * it. Otherwise, make sure the node is enabled and then do the
10327          * login.
10328          */
10329         ndlp = lpfc_findnode_did(vport, FDMI_DID);
10330         if (!ndlp) {
10331                 ndlp = lpfc_nlp_init(vport, FDMI_DID);
10332                 if (ndlp) {
10333                         ndlp->nlp_type |= NLP_FABRIC;
10334                 } else {
10335                         return;
10336                 }
10337         }
10338
10339         lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
10340         lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0);
10341 }
10342
10343 /**
10344  * lpfc_do_scr_ns_plogi - Issue a plogi to the name server for scr
10345  * @phba: pointer to lpfc hba data structure.
10346  * @vport: pointer to a virtual N_Port data structure.
10347  *
10348  * This routine issues a Port Login (PLOGI) to the Name Server with
10349  * State Change Request (SCR) for a @vport. This routine will create an
10350  * ndlp for the Name Server associated to the @vport if such node does
10351  * not already exist. The PLOGI to Name Server is issued by invoking the
10352  * lpfc_issue_els_plogi() routine. If Fabric-Device Management Interface
10353  * (FDMI) is configured to the @vport, a FDMI node will be created and
10354  * the PLOGI to FDMI is issued by invoking lpfc_issue_els_plogi() routine.
10355  **/
10356 void
10357 lpfc_do_scr_ns_plogi(struct lpfc_hba *phba, struct lpfc_vport *vport)
10358 {
10359         struct lpfc_nodelist *ndlp;
10360         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
10361
10362         /*
10363          * If lpfc_delay_discovery parameter is set and the clean address
10364          * bit is cleared and fc fabric parameters chenged, delay FC NPort
10365          * discovery.
10366          */
10367         spin_lock_irq(shost->host_lock);
10368         if (vport->fc_flag & FC_DISC_DELAYED) {
10369                 spin_unlock_irq(shost->host_lock);
10370                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
10371                                  "3334 Delay fc port discovery for %d secs\n",
10372                                  phba->fc_ratov);
10373                 mod_timer(&vport->delayed_disc_tmo,
10374                         jiffies + msecs_to_jiffies(1000 * phba->fc_ratov));
10375                 return;
10376         }
10377         spin_unlock_irq(shost->host_lock);
10378
10379         ndlp = lpfc_findnode_did(vport, NameServer_DID);
10380         if (!ndlp) {
10381                 ndlp = lpfc_nlp_init(vport, NameServer_DID);
10382                 if (!ndlp) {
10383                         if (phba->fc_topology == LPFC_TOPOLOGY_LOOP) {
10384                                 lpfc_disc_start(vport);
10385                                 return;
10386                         }
10387                         lpfc_vport_set_state(vport, FC_VPORT_FAILED);
10388                         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
10389                                          "0251 NameServer login: no memory\n");
10390                         return;
10391                 }
10392         }
10393
10394         ndlp->nlp_type |= NLP_FABRIC;
10395
10396         lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
10397
10398         if (lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0)) {
10399                 lpfc_vport_set_state(vport, FC_VPORT_FAILED);
10400                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
10401                                  "0252 Cannot issue NameServer login\n");
10402                 return;
10403         }
10404
10405         if ((phba->cfg_enable_SmartSAN ||
10406              (phba->cfg_fdmi_on == LPFC_FDMI_SUPPORT)) &&
10407              (vport->load_flag & FC_ALLOW_FDMI))
10408                 lpfc_start_fdmi(vport);
10409 }
10410
10411 /**
10412  * lpfc_cmpl_reg_new_vport - Completion callback function to register new vport
10413  * @phba: pointer to lpfc hba data structure.
10414  * @pmb: pointer to the driver internal queue element for mailbox command.
10415  *
10416  * This routine is the completion callback function to register new vport
10417  * mailbox command. If the new vport mailbox command completes successfully,
10418  * the fabric registration login shall be performed on physical port (the
10419  * new vport created is actually a physical port, with VPI 0) or the port
10420  * login to Name Server for State Change Request (SCR) will be performed
10421  * on virtual port (real virtual port, with VPI greater than 0).
10422  **/
10423 static void
10424 lpfc_cmpl_reg_new_vport(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
10425 {
10426         struct lpfc_vport *vport = pmb->vport;
10427         struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
10428         struct lpfc_nodelist *ndlp = (struct lpfc_nodelist *)pmb->ctx_ndlp;
10429         MAILBOX_t *mb = &pmb->u.mb;
10430         int rc;
10431
10432         spin_lock_irq(shost->host_lock);
10433         vport->fc_flag &= ~FC_VPORT_NEEDS_REG_VPI;
10434         spin_unlock_irq(shost->host_lock);
10435
10436         if (mb->mbxStatus) {
10437                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
10438                                 "0915 Register VPI failed : Status: x%x"
10439                                 " upd bit: x%x \n", mb->mbxStatus,
10440                                  mb->un.varRegVpi.upd);
10441                 if (phba->sli_rev == LPFC_SLI_REV4 &&
10442                         mb->un.varRegVpi.upd)
10443                         goto mbox_err_exit ;
10444
10445                 switch (mb->mbxStatus) {
10446                 case 0x11:      /* unsupported feature */
10447                 case 0x9603:    /* max_vpi exceeded */
10448                 case 0x9602:    /* Link event since CLEAR_LA */
10449                         /* giving up on vport registration */
10450                         lpfc_vport_set_state(vport, FC_VPORT_FAILED);
10451                         spin_lock_irq(shost->host_lock);
10452                         vport->fc_flag &= ~(FC_FABRIC | FC_PUBLIC_LOOP);
10453                         spin_unlock_irq(shost->host_lock);
10454                         lpfc_can_disctmo(vport);
10455                         break;
10456                 /* If reg_vpi fail with invalid VPI status, re-init VPI */
10457                 case 0x20:
10458                         spin_lock_irq(shost->host_lock);
10459                         vport->fc_flag |= FC_VPORT_NEEDS_REG_VPI;
10460                         spin_unlock_irq(shost->host_lock);
10461                         lpfc_init_vpi(phba, pmb, vport->vpi);
10462                         pmb->vport = vport;
10463                         pmb->mbox_cmpl = lpfc_init_vpi_cmpl;
10464                         rc = lpfc_sli_issue_mbox(phba, pmb,
10465                                 MBX_NOWAIT);
10466                         if (rc == MBX_NOT_FINISHED) {
10467                                 lpfc_printf_vlog(vport, KERN_ERR,
10468                                                  LOG_TRACE_EVENT,
10469                                         "2732 Failed to issue INIT_VPI"
10470                                         " mailbox command\n");
10471                         } else {
10472                                 lpfc_nlp_put(ndlp);
10473                                 return;
10474                         }
10475                         fallthrough;
10476                 default:
10477                         /* Try to recover from this error */
10478                         if (phba->sli_rev == LPFC_SLI_REV4)
10479                                 lpfc_sli4_unreg_all_rpis(vport);
10480                         lpfc_mbx_unreg_vpi(vport);
10481                         spin_lock_irq(shost->host_lock);
10482                         vport->fc_flag |= FC_VPORT_NEEDS_REG_VPI;
10483                         spin_unlock_irq(shost->host_lock);
10484                         if (mb->mbxStatus == MBX_NOT_FINISHED)
10485                                 break;
10486                         if ((vport->port_type == LPFC_PHYSICAL_PORT) &&
10487                             !(vport->fc_flag & FC_LOGO_RCVD_DID_CHNG)) {
10488                                 if (phba->sli_rev == LPFC_SLI_REV4)
10489                                         lpfc_issue_init_vfi(vport);
10490                                 else
10491                                         lpfc_initial_flogi(vport);
10492                         } else {
10493                                 lpfc_initial_fdisc(vport);
10494                         }
10495                         break;
10496                 }
10497         } else {
10498                 spin_lock_irq(shost->host_lock);
10499                 vport->vpi_state |= LPFC_VPI_REGISTERED;
10500                 spin_unlock_irq(shost->host_lock);
10501                 if (vport == phba->pport) {
10502                         if (phba->sli_rev < LPFC_SLI_REV4)
10503                                 lpfc_issue_fabric_reglogin(vport);
10504                         else {
10505                                 /*
10506                                  * If the physical port is instantiated using
10507                                  * FDISC, do not start vport discovery.
10508                                  */
10509                                 if (vport->port_state != LPFC_FDISC)
10510                                         lpfc_start_fdiscs(phba);
10511                                 lpfc_do_scr_ns_plogi(phba, vport);
10512                         }
10513                 } else {
10514                         lpfc_do_scr_ns_plogi(phba, vport);
10515                 }
10516         }
10517 mbox_err_exit:
10518         /* Now, we decrement the ndlp reference count held for this
10519          * callback function
10520          */
10521         lpfc_nlp_put(ndlp);
10522
10523         mempool_free(pmb, phba->mbox_mem_pool);
10524         return;
10525 }
10526
10527 /**
10528  * lpfc_register_new_vport - Register a new vport with a HBA
10529  * @phba: pointer to lpfc hba data structure.
10530  * @vport: pointer to a host virtual N_Port data structure.
10531  * @ndlp: pointer to a node-list data structure.
10532  *
10533  * This routine registers the @vport as a new virtual port with a HBA.
10534  * It is done through a registering vpi mailbox command.
10535  **/
10536 void
10537 lpfc_register_new_vport(struct lpfc_hba *phba, struct lpfc_vport *vport,
10538                         struct lpfc_nodelist *ndlp)
10539 {
10540         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
10541         LPFC_MBOXQ_t *mbox;
10542
10543         mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
10544         if (mbox) {
10545                 lpfc_reg_vpi(vport, mbox);
10546                 mbox->vport = vport;
10547                 mbox->ctx_ndlp = lpfc_nlp_get(ndlp);
10548                 if (!mbox->ctx_ndlp) {
10549                         mempool_free(mbox, phba->mbox_mem_pool);
10550                         goto mbox_err_exit;
10551                 }
10552
10553                 mbox->mbox_cmpl = lpfc_cmpl_reg_new_vport;
10554                 if (lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT)
10555                     == MBX_NOT_FINISHED) {
10556                         /* mailbox command not success, decrement ndlp
10557                          * reference count for this command
10558                          */
10559                         lpfc_nlp_put(ndlp);
10560                         mempool_free(mbox, phba->mbox_mem_pool);
10561
10562                         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
10563                                 "0253 Register VPI: Can't send mbox\n");
10564                         goto mbox_err_exit;
10565                 }
10566         } else {
10567                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
10568                                  "0254 Register VPI: no memory\n");
10569                 goto mbox_err_exit;
10570         }
10571         return;
10572
10573 mbox_err_exit:
10574         lpfc_vport_set_state(vport, FC_VPORT_FAILED);
10575         spin_lock_irq(shost->host_lock);
10576         vport->fc_flag &= ~FC_VPORT_NEEDS_REG_VPI;
10577         spin_unlock_irq(shost->host_lock);
10578         return;
10579 }
10580
10581 /**
10582  * lpfc_cancel_all_vport_retry_delay_timer - Cancel all vport retry delay timer
10583  * @phba: pointer to lpfc hba data structure.
10584  *
10585  * This routine cancels the retry delay timers to all the vports.
10586  **/
10587 void
10588 lpfc_cancel_all_vport_retry_delay_timer(struct lpfc_hba *phba)
10589 {
10590         struct lpfc_vport **vports;
10591         struct lpfc_nodelist *ndlp;
10592         uint32_t link_state;
10593         int i;
10594
10595         /* Treat this failure as linkdown for all vports */
10596         link_state = phba->link_state;
10597         lpfc_linkdown(phba);
10598         phba->link_state = link_state;
10599
10600         vports = lpfc_create_vport_work_array(phba);
10601
10602         if (vports) {
10603                 for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
10604                         ndlp = lpfc_findnode_did(vports[i], Fabric_DID);
10605                         if (ndlp)
10606                                 lpfc_cancel_retry_delay_tmo(vports[i], ndlp);
10607                         lpfc_els_flush_cmd(vports[i]);
10608                 }
10609                 lpfc_destroy_vport_work_array(phba, vports);
10610         }
10611 }
10612
10613 /**
10614  * lpfc_retry_pport_discovery - Start timer to retry FLOGI.
10615  * @phba: pointer to lpfc hba data structure.
10616  *
10617  * This routine abort all pending discovery commands and
10618  * start a timer to retry FLOGI for the physical port
10619  * discovery.
10620  **/
10621 void
10622 lpfc_retry_pport_discovery(struct lpfc_hba *phba)
10623 {
10624         struct lpfc_nodelist *ndlp;
10625
10626         /* Cancel the all vports retry delay retry timers */
10627         lpfc_cancel_all_vport_retry_delay_timer(phba);
10628
10629         /* If fabric require FLOGI, then re-instantiate physical login */
10630         ndlp = lpfc_findnode_did(phba->pport, Fabric_DID);
10631         if (!ndlp)
10632                 return;
10633
10634         mod_timer(&ndlp->nlp_delayfunc, jiffies + msecs_to_jiffies(1000));
10635         spin_lock_irq(&ndlp->lock);
10636         ndlp->nlp_flag |= NLP_DELAY_TMO;
10637         spin_unlock_irq(&ndlp->lock);
10638         ndlp->nlp_last_elscmd = ELS_CMD_FLOGI;
10639         phba->pport->port_state = LPFC_FLOGI;
10640         return;
10641 }
10642
10643 /**
10644  * lpfc_fabric_login_reqd - Check if FLOGI required.
10645  * @phba: pointer to lpfc hba data structure.
10646  * @cmdiocb: pointer to FDISC command iocb.
10647  * @rspiocb: pointer to FDISC response iocb.
10648  *
10649  * This routine checks if a FLOGI is reguired for FDISC
10650  * to succeed.
10651  **/
10652 static int
10653 lpfc_fabric_login_reqd(struct lpfc_hba *phba,
10654                 struct lpfc_iocbq *cmdiocb,
10655                 struct lpfc_iocbq *rspiocb)
10656 {
10657
10658         if ((rspiocb->iocb.ulpStatus != IOSTAT_FABRIC_RJT) ||
10659                 (rspiocb->iocb.un.ulpWord[4] != RJT_LOGIN_REQUIRED))
10660                 return 0;
10661         else
10662                 return 1;
10663 }
10664
10665 /**
10666  * lpfc_cmpl_els_fdisc - Completion function for fdisc iocb command
10667  * @phba: pointer to lpfc hba data structure.
10668  * @cmdiocb: pointer to lpfc command iocb data structure.
10669  * @rspiocb: pointer to lpfc response iocb data structure.
10670  *
10671  * This routine is the completion callback function to a Fabric Discover
10672  * (FDISC) ELS command. Since all the FDISC ELS commands are issued
10673  * single threaded, each FDISC completion callback function will reset
10674  * the discovery timer for all vports such that the timers will not get
10675  * unnecessary timeout. The function checks the FDISC IOCB status. If error
10676  * detected, the vport will be set to FC_VPORT_FAILED state. Otherwise,the
10677  * vport will set to FC_VPORT_ACTIVE state. It then checks whether the DID
10678  * assigned to the vport has been changed with the completion of the FDISC
10679  * command. If so, both RPI (Remote Port Index) and VPI (Virtual Port Index)
10680  * are unregistered from the HBA, and then the lpfc_register_new_vport()
10681  * routine is invoked to register new vport with the HBA. Otherwise, the
10682  * lpfc_do_scr_ns_plogi() routine is invoked to issue a PLOGI to the Name
10683  * Server for State Change Request (SCR).
10684  **/
10685 static void
10686 lpfc_cmpl_els_fdisc(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
10687                     struct lpfc_iocbq *rspiocb)
10688 {
10689         struct lpfc_vport *vport = cmdiocb->vport;
10690         struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
10691         struct lpfc_nodelist *ndlp = (struct lpfc_nodelist *) cmdiocb->context1;
10692         struct lpfc_nodelist *np;
10693         struct lpfc_nodelist *next_np;
10694         IOCB_t *irsp = &rspiocb->iocb;
10695         struct lpfc_iocbq *piocb;
10696         struct lpfc_dmabuf *pcmd = cmdiocb->context2, *prsp;
10697         struct serv_parm *sp;
10698         uint8_t fabric_param_changed;
10699
10700         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
10701                          "0123 FDISC completes. x%x/x%x prevDID: x%x\n",
10702                          irsp->ulpStatus, irsp->un.ulpWord[4],
10703                          vport->fc_prevDID);
10704         /* Since all FDISCs are being single threaded, we
10705          * must reset the discovery timer for ALL vports
10706          * waiting to send FDISC when one completes.
10707          */
10708         list_for_each_entry(piocb, &phba->fabric_iocb_list, list) {
10709                 lpfc_set_disctmo(piocb->vport);
10710         }
10711
10712         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
10713                 "FDISC cmpl:      status:x%x/x%x prevdid:x%x",
10714                 irsp->ulpStatus, irsp->un.ulpWord[4], vport->fc_prevDID);
10715
10716         if (irsp->ulpStatus) {
10717
10718                 if (lpfc_fabric_login_reqd(phba, cmdiocb, rspiocb)) {
10719                         lpfc_retry_pport_discovery(phba);
10720                         goto out;
10721                 }
10722
10723                 /* Check for retry */
10724                 if (lpfc_els_retry(phba, cmdiocb, rspiocb))
10725                         goto out;
10726                 /* FDISC failed */
10727                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
10728                                  "0126 FDISC failed. (x%x/x%x)\n",
10729                                  irsp->ulpStatus, irsp->un.ulpWord[4]);
10730                 goto fdisc_failed;
10731         }
10732
10733         lpfc_check_nlp_post_devloss(vport, ndlp);
10734
10735         spin_lock_irq(shost->host_lock);
10736         vport->fc_flag &= ~FC_VPORT_CVL_RCVD;
10737         vport->fc_flag &= ~FC_VPORT_LOGO_RCVD;
10738         vport->fc_flag |= FC_FABRIC;
10739         if (vport->phba->fc_topology == LPFC_TOPOLOGY_LOOP)
10740                 vport->fc_flag |=  FC_PUBLIC_LOOP;
10741         spin_unlock_irq(shost->host_lock);
10742
10743         vport->fc_myDID = irsp->un.ulpWord[4] & Mask_DID;
10744         lpfc_vport_set_state(vport, FC_VPORT_ACTIVE);
10745         prsp = list_get_first(&pcmd->list, struct lpfc_dmabuf, list);
10746         if (!prsp)
10747                 goto out;
10748         sp = prsp->virt + sizeof(uint32_t);
10749         fabric_param_changed = lpfc_check_clean_addr_bit(vport, sp);
10750         memcpy(&vport->fabric_portname, &sp->portName,
10751                 sizeof(struct lpfc_name));
10752         memcpy(&vport->fabric_nodename, &sp->nodeName,
10753                 sizeof(struct lpfc_name));
10754         if (fabric_param_changed &&
10755                 !(vport->fc_flag & FC_VPORT_NEEDS_REG_VPI)) {
10756                 /* If our NportID changed, we need to ensure all
10757                  * remaining NPORTs get unreg_login'ed so we can
10758                  * issue unreg_vpi.
10759                  */
10760                 list_for_each_entry_safe(np, next_np,
10761                         &vport->fc_nodes, nlp_listp) {
10762                         if ((np->nlp_state != NLP_STE_NPR_NODE) ||
10763                             !(np->nlp_flag & NLP_NPR_ADISC))
10764                                 continue;
10765                         spin_lock_irq(&ndlp->lock);
10766                         np->nlp_flag &= ~NLP_NPR_ADISC;
10767                         spin_unlock_irq(&ndlp->lock);
10768                         lpfc_unreg_rpi(vport, np);
10769                 }
10770                 lpfc_cleanup_pending_mbox(vport);
10771
10772                 if (phba->sli_rev == LPFC_SLI_REV4)
10773                         lpfc_sli4_unreg_all_rpis(vport);
10774
10775                 lpfc_mbx_unreg_vpi(vport);
10776                 spin_lock_irq(shost->host_lock);
10777                 vport->fc_flag |= FC_VPORT_NEEDS_REG_VPI;
10778                 if (phba->sli_rev == LPFC_SLI_REV4)
10779                         vport->fc_flag |= FC_VPORT_NEEDS_INIT_VPI;
10780                 else
10781                         vport->fc_flag |= FC_LOGO_RCVD_DID_CHNG;
10782                 spin_unlock_irq(shost->host_lock);
10783         } else if ((phba->sli_rev == LPFC_SLI_REV4) &&
10784                 !(vport->fc_flag & FC_VPORT_NEEDS_REG_VPI)) {
10785                 /*
10786                  * Driver needs to re-reg VPI in order for f/w
10787                  * to update the MAC address.
10788                  */
10789                 lpfc_register_new_vport(phba, vport, ndlp);
10790                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
10791                 goto out;
10792         }
10793
10794         if (vport->fc_flag & FC_VPORT_NEEDS_INIT_VPI)
10795                 lpfc_issue_init_vpi(vport);
10796         else if (vport->fc_flag & FC_VPORT_NEEDS_REG_VPI)
10797                 lpfc_register_new_vport(phba, vport, ndlp);
10798         else
10799                 lpfc_do_scr_ns_plogi(phba, vport);
10800
10801         /* The FDISC completed successfully. Move the fabric ndlp to
10802          * UNMAPPED state and register with the transport.
10803          */
10804         lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
10805         goto out;
10806
10807 fdisc_failed:
10808         if (vport->fc_vport &&
10809             (vport->fc_vport->vport_state != FC_VPORT_NO_FABRIC_RSCS))
10810                 lpfc_vport_set_state(vport, FC_VPORT_FAILED);
10811         /* Cancel discovery timer */
10812         lpfc_can_disctmo(vport);
10813 out:
10814         lpfc_els_free_iocb(phba, cmdiocb);
10815         lpfc_nlp_put(ndlp);
10816 }
10817
10818 /**
10819  * lpfc_issue_els_fdisc - Issue a fdisc iocb command
10820  * @vport: pointer to a virtual N_Port data structure.
10821  * @ndlp: pointer to a node-list data structure.
10822  * @retry: number of retries to the command IOCB.
10823  *
10824  * This routine prepares and issues a Fabric Discover (FDISC) IOCB to
10825  * a remote node (@ndlp) off a @vport. It uses the lpfc_issue_fabric_iocb()
10826  * routine to issue the IOCB, which makes sure only one outstanding fabric
10827  * IOCB will be sent off HBA at any given time.
10828  *
10829  * Note that the ndlp reference count will be incremented by 1 for holding the
10830  * ndlp and the reference to ndlp will be stored into the context1 field of
10831  * the IOCB for the completion callback function to the FDISC ELS command.
10832  *
10833  * Return code
10834  *   0 - Successfully issued fdisc iocb command
10835  *   1 - Failed to issue fdisc iocb command
10836  **/
10837 static int
10838 lpfc_issue_els_fdisc(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
10839                      uint8_t retry)
10840 {
10841         struct lpfc_hba *phba = vport->phba;
10842         IOCB_t *icmd;
10843         struct lpfc_iocbq *elsiocb;
10844         struct serv_parm *sp;
10845         uint8_t *pcmd;
10846         uint16_t cmdsize;
10847         int did = ndlp->nlp_DID;
10848         int rc;
10849
10850         vport->port_state = LPFC_FDISC;
10851         vport->fc_myDID = 0;
10852         cmdsize = (sizeof(uint32_t) + sizeof(struct serv_parm));
10853         elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, retry, ndlp, did,
10854                                      ELS_CMD_FDISC);
10855         if (!elsiocb) {
10856                 lpfc_vport_set_state(vport, FC_VPORT_FAILED);
10857                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
10858                                  "0255 Issue FDISC: no IOCB\n");
10859                 return 1;
10860         }
10861
10862         icmd = &elsiocb->iocb;
10863         icmd->un.elsreq64.myID = 0;
10864         icmd->un.elsreq64.fl = 1;
10865
10866         /*
10867          * SLI3 ports require a different context type value than SLI4.
10868          * Catch SLI3 ports here and override the prep.
10869          */
10870         if (phba->sli_rev == LPFC_SLI_REV3) {
10871                 icmd->ulpCt_h = 1;
10872                 icmd->ulpCt_l = 0;
10873         }
10874
10875         pcmd = (uint8_t *) (((struct lpfc_dmabuf *) elsiocb->context2)->virt);
10876         *((uint32_t *) (pcmd)) = ELS_CMD_FDISC;
10877         pcmd += sizeof(uint32_t); /* CSP Word 1 */
10878         memcpy(pcmd, &vport->phba->pport->fc_sparam, sizeof(struct serv_parm));
10879         sp = (struct serv_parm *) pcmd;
10880         /* Setup CSPs accordingly for Fabric */
10881         sp->cmn.e_d_tov = 0;
10882         sp->cmn.w2.r_a_tov = 0;
10883         sp->cmn.virtual_fabric_support = 0;
10884         sp->cls1.classValid = 0;
10885         sp->cls2.seqDelivery = 1;
10886         sp->cls3.seqDelivery = 1;
10887
10888         pcmd += sizeof(uint32_t); /* CSP Word 2 */
10889         pcmd += sizeof(uint32_t); /* CSP Word 3 */
10890         pcmd += sizeof(uint32_t); /* CSP Word 4 */
10891         pcmd += sizeof(uint32_t); /* Port Name */
10892         memcpy(pcmd, &vport->fc_portname, 8);
10893         pcmd += sizeof(uint32_t); /* Node Name */
10894         pcmd += sizeof(uint32_t); /* Node Name */
10895         memcpy(pcmd, &vport->fc_nodename, 8);
10896         sp->cmn.valid_vendor_ver_level = 0;
10897         memset(sp->un.vendorVersion, 0, sizeof(sp->un.vendorVersion));
10898         lpfc_set_disctmo(vport);
10899
10900         phba->fc_stat.elsXmitFDISC++;
10901         elsiocb->iocb_cmpl = lpfc_cmpl_els_fdisc;
10902
10903         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
10904                 "Issue FDISC:     did:x%x",
10905                 did, 0, 0);
10906
10907         elsiocb->context1 = lpfc_nlp_get(ndlp);
10908         if (!elsiocb->context1) {
10909                 lpfc_els_free_iocb(phba, elsiocb);
10910                 goto err_out;
10911         }
10912
10913         rc = lpfc_issue_fabric_iocb(phba, elsiocb);
10914         if (rc == IOCB_ERROR) {
10915                 lpfc_els_free_iocb(phba, elsiocb);
10916                 lpfc_nlp_put(ndlp);
10917                 goto err_out;
10918         }
10919
10920         lpfc_vport_set_state(vport, FC_VPORT_INITIALIZING);
10921         return 0;
10922
10923  err_out:
10924         lpfc_vport_set_state(vport, FC_VPORT_FAILED);
10925         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
10926                          "0256 Issue FDISC: Cannot send IOCB\n");
10927         return 1;
10928 }
10929
10930 /**
10931  * lpfc_cmpl_els_npiv_logo - Completion function with vport logo
10932  * @phba: pointer to lpfc hba data structure.
10933  * @cmdiocb: pointer to lpfc command iocb data structure.
10934  * @rspiocb: pointer to lpfc response iocb data structure.
10935  *
10936  * This routine is the completion callback function to the issuing of a LOGO
10937  * ELS command off a vport. It frees the command IOCB and then decrement the
10938  * reference count held on ndlp for this completion function, indicating that
10939  * the reference to the ndlp is no long needed. Note that the
10940  * lpfc_els_free_iocb() routine decrements the ndlp reference held for this
10941  * callback function and an additional explicit ndlp reference decrementation
10942  * will trigger the actual release of the ndlp.
10943  **/
10944 static void
10945 lpfc_cmpl_els_npiv_logo(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
10946                         struct lpfc_iocbq *rspiocb)
10947 {
10948         struct lpfc_vport *vport = cmdiocb->vport;
10949         IOCB_t *irsp;
10950         struct lpfc_nodelist *ndlp;
10951         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
10952
10953         ndlp = (struct lpfc_nodelist *)cmdiocb->context1;
10954         irsp = &rspiocb->iocb;
10955         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
10956                 "LOGO npiv cmpl:  status:x%x/x%x did:x%x",
10957                 irsp->ulpStatus, irsp->un.ulpWord[4], irsp->un.rcvels.remoteID);
10958
10959         /* NPIV LOGO completes to NPort <nlp_DID> */
10960         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
10961                          "2928 NPIV LOGO completes to NPort x%x "
10962                          "Data: x%x x%x x%x x%x x%x x%x x%x\n",
10963                          ndlp->nlp_DID, irsp->ulpStatus, irsp->un.ulpWord[4],
10964                          irsp->ulpTimeout, vport->num_disc_nodes,
10965                          kref_read(&ndlp->kref), ndlp->nlp_flag,
10966                          ndlp->fc4_xpt_flags);
10967
10968         if (irsp->ulpStatus == IOSTAT_SUCCESS) {
10969                 spin_lock_irq(shost->host_lock);
10970                 vport->fc_flag &= ~FC_NDISC_ACTIVE;
10971                 vport->fc_flag &= ~FC_FABRIC;
10972                 spin_unlock_irq(shost->host_lock);
10973                 lpfc_can_disctmo(vport);
10974         }
10975
10976         if (ndlp->save_flags & NLP_WAIT_FOR_LOGO) {
10977                 /* Wake up lpfc_vport_delete if waiting...*/
10978                 if (ndlp->logo_waitq)
10979                         wake_up(ndlp->logo_waitq);
10980                 spin_lock_irq(&ndlp->lock);
10981                 ndlp->nlp_flag &= ~(NLP_ISSUE_LOGO | NLP_LOGO_SND);
10982                 ndlp->save_flags &= ~NLP_WAIT_FOR_LOGO;
10983                 spin_unlock_irq(&ndlp->lock);
10984         }
10985
10986         /* Safe to release resources now. */
10987         lpfc_els_free_iocb(phba, cmdiocb);
10988         lpfc_nlp_put(ndlp);
10989 }
10990
10991 /**
10992  * lpfc_issue_els_npiv_logo - Issue a logo off a vport
10993  * @vport: pointer to a virtual N_Port data structure.
10994  * @ndlp: pointer to a node-list data structure.
10995  *
10996  * This routine issues a LOGO ELS command to an @ndlp off a @vport.
10997  *
10998  * Note that the ndlp reference count will be incremented by 1 for holding the
10999  * ndlp and the reference to ndlp will be stored into the context1 field of
11000  * the IOCB for the completion callback function to the LOGO ELS command.
11001  *
11002  * Return codes
11003  *   0 - Successfully issued logo off the @vport
11004  *   1 - Failed to issue logo off the @vport
11005  **/
11006 int
11007 lpfc_issue_els_npiv_logo(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
11008 {
11009         int rc = 0;
11010         struct lpfc_hba  *phba = vport->phba;
11011         struct lpfc_iocbq *elsiocb;
11012         uint8_t *pcmd;
11013         uint16_t cmdsize;
11014
11015         cmdsize = 2 * sizeof(uint32_t) + sizeof(struct lpfc_name);
11016         elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, 0, ndlp, ndlp->nlp_DID,
11017                                      ELS_CMD_LOGO);
11018         if (!elsiocb)
11019                 return 1;
11020
11021         pcmd = (uint8_t *) (((struct lpfc_dmabuf *) elsiocb->context2)->virt);
11022         *((uint32_t *) (pcmd)) = ELS_CMD_LOGO;
11023         pcmd += sizeof(uint32_t);
11024
11025         /* Fill in LOGO payload */
11026         *((uint32_t *) (pcmd)) = be32_to_cpu(vport->fc_myDID);
11027         pcmd += sizeof(uint32_t);
11028         memcpy(pcmd, &vport->fc_portname, sizeof(struct lpfc_name));
11029
11030         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
11031                 "Issue LOGO npiv  did:x%x flg:x%x",
11032                 ndlp->nlp_DID, ndlp->nlp_flag, 0);
11033
11034         elsiocb->iocb_cmpl = lpfc_cmpl_els_npiv_logo;
11035         spin_lock_irq(&ndlp->lock);
11036         ndlp->nlp_flag |= NLP_LOGO_SND;
11037         spin_unlock_irq(&ndlp->lock);
11038         elsiocb->context1 = lpfc_nlp_get(ndlp);
11039         if (!elsiocb->context1) {
11040                 lpfc_els_free_iocb(phba, elsiocb);
11041                 goto err;
11042         }
11043
11044         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
11045         if (rc == IOCB_ERROR) {
11046                 lpfc_els_free_iocb(phba, elsiocb);
11047                 lpfc_nlp_put(ndlp);
11048                 goto err;
11049         }
11050         return 0;
11051
11052 err:
11053         spin_lock_irq(&ndlp->lock);
11054         ndlp->nlp_flag &= ~NLP_LOGO_SND;
11055         spin_unlock_irq(&ndlp->lock);
11056         return 1;
11057 }
11058
11059 /**
11060  * lpfc_fabric_block_timeout - Handler function to the fabric block timer
11061  * @t: timer context used to obtain the lpfc hba.
11062  *
11063  * This routine is invoked by the fabric iocb block timer after
11064  * timeout. It posts the fabric iocb block timeout event by setting the
11065  * WORKER_FABRIC_BLOCK_TMO bit to work port event bitmap and then invokes
11066  * lpfc_worker_wake_up() routine to wake up the worker thread. It is for
11067  * the worker thread to invoke the lpfc_unblock_fabric_iocbs() on the
11068  * posted event WORKER_FABRIC_BLOCK_TMO.
11069  **/
11070 void
11071 lpfc_fabric_block_timeout(struct timer_list *t)
11072 {
11073         struct lpfc_hba  *phba = from_timer(phba, t, fabric_block_timer);
11074         unsigned long iflags;
11075         uint32_t tmo_posted;
11076
11077         spin_lock_irqsave(&phba->pport->work_port_lock, iflags);
11078         tmo_posted = phba->pport->work_port_events & WORKER_FABRIC_BLOCK_TMO;
11079         if (!tmo_posted)
11080                 phba->pport->work_port_events |= WORKER_FABRIC_BLOCK_TMO;
11081         spin_unlock_irqrestore(&phba->pport->work_port_lock, iflags);
11082
11083         if (!tmo_posted)
11084                 lpfc_worker_wake_up(phba);
11085         return;
11086 }
11087
11088 /**
11089  * lpfc_resume_fabric_iocbs - Issue a fabric iocb from driver internal list
11090  * @phba: pointer to lpfc hba data structure.
11091  *
11092  * This routine issues one fabric iocb from the driver internal list to
11093  * the HBA. It first checks whether it's ready to issue one fabric iocb to
11094  * the HBA (whether there is no outstanding fabric iocb). If so, it shall
11095  * remove one pending fabric iocb from the driver internal list and invokes
11096  * lpfc_sli_issue_iocb() routine to send the fabric iocb to the HBA.
11097  **/
11098 static void
11099 lpfc_resume_fabric_iocbs(struct lpfc_hba *phba)
11100 {
11101         struct lpfc_iocbq *iocb;
11102         unsigned long iflags;
11103         int ret;
11104         IOCB_t *cmd;
11105
11106 repeat:
11107         iocb = NULL;
11108         spin_lock_irqsave(&phba->hbalock, iflags);
11109         /* Post any pending iocb to the SLI layer */
11110         if (atomic_read(&phba->fabric_iocb_count) == 0) {
11111                 list_remove_head(&phba->fabric_iocb_list, iocb, typeof(*iocb),
11112                                  list);
11113                 if (iocb)
11114                         /* Increment fabric iocb count to hold the position */
11115                         atomic_inc(&phba->fabric_iocb_count);
11116         }
11117         spin_unlock_irqrestore(&phba->hbalock, iflags);
11118         if (iocb) {
11119                 iocb->fabric_iocb_cmpl = iocb->iocb_cmpl;
11120                 iocb->iocb_cmpl = lpfc_cmpl_fabric_iocb;
11121                 iocb->iocb_flag |= LPFC_IO_FABRIC;
11122
11123                 lpfc_debugfs_disc_trc(iocb->vport, LPFC_DISC_TRC_ELS_CMD,
11124                         "Fabric sched1:   ste:x%x",
11125                         iocb->vport->port_state, 0, 0);
11126
11127                 ret = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, iocb, 0);
11128
11129                 if (ret == IOCB_ERROR) {
11130                         iocb->iocb_cmpl = iocb->fabric_iocb_cmpl;
11131                         iocb->fabric_iocb_cmpl = NULL;
11132                         iocb->iocb_flag &= ~LPFC_IO_FABRIC;
11133                         cmd = &iocb->iocb;
11134                         cmd->ulpStatus = IOSTAT_LOCAL_REJECT;
11135                         cmd->un.ulpWord[4] = IOERR_SLI_ABORTED;
11136                         iocb->iocb_cmpl(phba, iocb, iocb);
11137
11138                         atomic_dec(&phba->fabric_iocb_count);
11139                         goto repeat;
11140                 }
11141         }
11142 }
11143
11144 /**
11145  * lpfc_unblock_fabric_iocbs - Unblock issuing fabric iocb command
11146  * @phba: pointer to lpfc hba data structure.
11147  *
11148  * This routine unblocks the  issuing fabric iocb command. The function
11149  * will clear the fabric iocb block bit and then invoke the routine
11150  * lpfc_resume_fabric_iocbs() to issue one of the pending fabric iocb
11151  * from the driver internal fabric iocb list.
11152  **/
11153 void
11154 lpfc_unblock_fabric_iocbs(struct lpfc_hba *phba)
11155 {
11156         clear_bit(FABRIC_COMANDS_BLOCKED, &phba->bit_flags);
11157
11158         lpfc_resume_fabric_iocbs(phba);
11159         return;
11160 }
11161
11162 /**
11163  * lpfc_block_fabric_iocbs - Block issuing fabric iocb command
11164  * @phba: pointer to lpfc hba data structure.
11165  *
11166  * This routine blocks the issuing fabric iocb for a specified amount of
11167  * time (currently 100 ms). This is done by set the fabric iocb block bit
11168  * and set up a timeout timer for 100ms. When the block bit is set, no more
11169  * fabric iocb will be issued out of the HBA.
11170  **/
11171 static void
11172 lpfc_block_fabric_iocbs(struct lpfc_hba *phba)
11173 {
11174         int blocked;
11175
11176         blocked = test_and_set_bit(FABRIC_COMANDS_BLOCKED, &phba->bit_flags);
11177         /* Start a timer to unblock fabric iocbs after 100ms */
11178         if (!blocked)
11179                 mod_timer(&phba->fabric_block_timer,
11180                           jiffies + msecs_to_jiffies(100));
11181
11182         return;
11183 }
11184
11185 /**
11186  * lpfc_cmpl_fabric_iocb - Completion callback function for fabric iocb
11187  * @phba: pointer to lpfc hba data structure.
11188  * @cmdiocb: pointer to lpfc command iocb data structure.
11189  * @rspiocb: pointer to lpfc response iocb data structure.
11190  *
11191  * This routine is the callback function that is put to the fabric iocb's
11192  * callback function pointer (iocb->iocb_cmpl). The original iocb's callback
11193  * function pointer has been stored in iocb->fabric_iocb_cmpl. This callback
11194  * function first restores and invokes the original iocb's callback function
11195  * and then invokes the lpfc_resume_fabric_iocbs() routine to issue the next
11196  * fabric bound iocb from the driver internal fabric iocb list onto the wire.
11197  **/
11198 static void
11199 lpfc_cmpl_fabric_iocb(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
11200         struct lpfc_iocbq *rspiocb)
11201 {
11202         struct ls_rjt stat;
11203
11204         BUG_ON((cmdiocb->iocb_flag & LPFC_IO_FABRIC) != LPFC_IO_FABRIC);
11205
11206         switch (rspiocb->iocb.ulpStatus) {
11207                 case IOSTAT_NPORT_RJT:
11208                 case IOSTAT_FABRIC_RJT:
11209                         if (rspiocb->iocb.un.ulpWord[4] & RJT_UNAVAIL_TEMP) {
11210                                 lpfc_block_fabric_iocbs(phba);
11211                         }
11212                         break;
11213
11214                 case IOSTAT_NPORT_BSY:
11215                 case IOSTAT_FABRIC_BSY:
11216                         lpfc_block_fabric_iocbs(phba);
11217                         break;
11218
11219                 case IOSTAT_LS_RJT:
11220                         stat.un.lsRjtError =
11221                                 be32_to_cpu(rspiocb->iocb.un.ulpWord[4]);
11222                         if ((stat.un.b.lsRjtRsnCode == LSRJT_UNABLE_TPC) ||
11223                                 (stat.un.b.lsRjtRsnCode == LSRJT_LOGICAL_BSY))
11224                                 lpfc_block_fabric_iocbs(phba);
11225                         break;
11226         }
11227
11228         BUG_ON(atomic_read(&phba->fabric_iocb_count) == 0);
11229
11230         cmdiocb->iocb_cmpl = cmdiocb->fabric_iocb_cmpl;
11231         cmdiocb->fabric_iocb_cmpl = NULL;
11232         cmdiocb->iocb_flag &= ~LPFC_IO_FABRIC;
11233         cmdiocb->iocb_cmpl(phba, cmdiocb, rspiocb);
11234
11235         atomic_dec(&phba->fabric_iocb_count);
11236         if (!test_bit(FABRIC_COMANDS_BLOCKED, &phba->bit_flags)) {
11237                 /* Post any pending iocbs to HBA */
11238                 lpfc_resume_fabric_iocbs(phba);
11239         }
11240 }
11241
11242 /**
11243  * lpfc_issue_fabric_iocb - Issue a fabric iocb command
11244  * @phba: pointer to lpfc hba data structure.
11245  * @iocb: pointer to lpfc command iocb data structure.
11246  *
11247  * This routine is used as the top-level API for issuing a fabric iocb command
11248  * such as FLOGI and FDISC. To accommodate certain switch fabric, this driver
11249  * function makes sure that only one fabric bound iocb will be outstanding at
11250  * any given time. As such, this function will first check to see whether there
11251  * is already an outstanding fabric iocb on the wire. If so, it will put the
11252  * newly issued iocb onto the driver internal fabric iocb list, waiting to be
11253  * issued later. Otherwise, it will issue the iocb on the wire and update the
11254  * fabric iocb count it indicate that there is one fabric iocb on the wire.
11255  *
11256  * Note, this implementation has a potential sending out fabric IOCBs out of
11257  * order. The problem is caused by the construction of the "ready" boolen does
11258  * not include the condition that the internal fabric IOCB list is empty. As
11259  * such, it is possible a fabric IOCB issued by this routine might be "jump"
11260  * ahead of the fabric IOCBs in the internal list.
11261  *
11262  * Return code
11263  *   IOCB_SUCCESS - either fabric iocb put on the list or issued successfully
11264  *   IOCB_ERROR - failed to issue fabric iocb
11265  **/
11266 static int
11267 lpfc_issue_fabric_iocb(struct lpfc_hba *phba, struct lpfc_iocbq *iocb)
11268 {
11269         unsigned long iflags;
11270         int ready;
11271         int ret;
11272
11273         BUG_ON(atomic_read(&phba->fabric_iocb_count) > 1);
11274
11275         spin_lock_irqsave(&phba->hbalock, iflags);
11276         ready = atomic_read(&phba->fabric_iocb_count) == 0 &&
11277                 !test_bit(FABRIC_COMANDS_BLOCKED, &phba->bit_flags);
11278
11279         if (ready)
11280                 /* Increment fabric iocb count to hold the position */
11281                 atomic_inc(&phba->fabric_iocb_count);
11282         spin_unlock_irqrestore(&phba->hbalock, iflags);
11283         if (ready) {
11284                 iocb->fabric_iocb_cmpl = iocb->iocb_cmpl;
11285                 iocb->iocb_cmpl = lpfc_cmpl_fabric_iocb;
11286                 iocb->iocb_flag |= LPFC_IO_FABRIC;
11287
11288                 lpfc_debugfs_disc_trc(iocb->vport, LPFC_DISC_TRC_ELS_CMD,
11289                         "Fabric sched2:   ste:x%x",
11290                         iocb->vport->port_state, 0, 0);
11291
11292                 ret = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, iocb, 0);
11293
11294                 if (ret == IOCB_ERROR) {
11295                         iocb->iocb_cmpl = iocb->fabric_iocb_cmpl;
11296                         iocb->fabric_iocb_cmpl = NULL;
11297                         iocb->iocb_flag &= ~LPFC_IO_FABRIC;
11298                         atomic_dec(&phba->fabric_iocb_count);
11299                 }
11300         } else {
11301                 spin_lock_irqsave(&phba->hbalock, iflags);
11302                 list_add_tail(&iocb->list, &phba->fabric_iocb_list);
11303                 spin_unlock_irqrestore(&phba->hbalock, iflags);
11304                 ret = IOCB_SUCCESS;
11305         }
11306         return ret;
11307 }
11308
11309 /**
11310  * lpfc_fabric_abort_vport - Abort a vport's iocbs from driver fabric iocb list
11311  * @vport: pointer to a virtual N_Port data structure.
11312  *
11313  * This routine aborts all the IOCBs associated with a @vport from the
11314  * driver internal fabric IOCB list. The list contains fabric IOCBs to be
11315  * issued to the ELS IOCB ring. This abort function walks the fabric IOCB
11316  * list, removes each IOCB associated with the @vport off the list, set the
11317  * status field to IOSTAT_LOCAL_REJECT, and invokes the callback function
11318  * associated with the IOCB.
11319  **/
11320 static void lpfc_fabric_abort_vport(struct lpfc_vport *vport)
11321 {
11322         LIST_HEAD(completions);
11323         struct lpfc_hba  *phba = vport->phba;
11324         struct lpfc_iocbq *tmp_iocb, *piocb;
11325
11326         spin_lock_irq(&phba->hbalock);
11327         list_for_each_entry_safe(piocb, tmp_iocb, &phba->fabric_iocb_list,
11328                                  list) {
11329
11330                 if (piocb->vport != vport)
11331                         continue;
11332
11333                 list_move_tail(&piocb->list, &completions);
11334         }
11335         spin_unlock_irq(&phba->hbalock);
11336
11337         /* Cancel all the IOCBs from the completions list */
11338         lpfc_sli_cancel_iocbs(phba, &completions, IOSTAT_LOCAL_REJECT,
11339                               IOERR_SLI_ABORTED);
11340 }
11341
11342 /**
11343  * lpfc_fabric_abort_nport - Abort a ndlp's iocbs from driver fabric iocb list
11344  * @ndlp: pointer to a node-list data structure.
11345  *
11346  * This routine aborts all the IOCBs associated with an @ndlp from the
11347  * driver internal fabric IOCB list. The list contains fabric IOCBs to be
11348  * issued to the ELS IOCB ring. This abort function walks the fabric IOCB
11349  * list, removes each IOCB associated with the @ndlp off the list, set the
11350  * status field to IOSTAT_LOCAL_REJECT, and invokes the callback function
11351  * associated with the IOCB.
11352  **/
11353 void lpfc_fabric_abort_nport(struct lpfc_nodelist *ndlp)
11354 {
11355         LIST_HEAD(completions);
11356         struct lpfc_hba  *phba = ndlp->phba;
11357         struct lpfc_iocbq *tmp_iocb, *piocb;
11358         struct lpfc_sli_ring *pring;
11359
11360         pring = lpfc_phba_elsring(phba);
11361
11362         if (unlikely(!pring))
11363                 return;
11364
11365         spin_lock_irq(&phba->hbalock);
11366         list_for_each_entry_safe(piocb, tmp_iocb, &phba->fabric_iocb_list,
11367                                  list) {
11368                 if ((lpfc_check_sli_ndlp(phba, pring, piocb, ndlp))) {
11369
11370                         list_move_tail(&piocb->list, &completions);
11371                 }
11372         }
11373         spin_unlock_irq(&phba->hbalock);
11374
11375         /* Cancel all the IOCBs from the completions list */
11376         lpfc_sli_cancel_iocbs(phba, &completions, IOSTAT_LOCAL_REJECT,
11377                               IOERR_SLI_ABORTED);
11378 }
11379
11380 /**
11381  * lpfc_fabric_abort_hba - Abort all iocbs on driver fabric iocb list
11382  * @phba: pointer to lpfc hba data structure.
11383  *
11384  * This routine aborts all the IOCBs currently on the driver internal
11385  * fabric IOCB list. The list contains fabric IOCBs to be issued to the ELS
11386  * IOCB ring. This function takes the entire IOCB list off the fabric IOCB
11387  * list, removes IOCBs off the list, set the status field to
11388  * IOSTAT_LOCAL_REJECT, and invokes the callback function associated with
11389  * the IOCB.
11390  **/
11391 void lpfc_fabric_abort_hba(struct lpfc_hba *phba)
11392 {
11393         LIST_HEAD(completions);
11394
11395         spin_lock_irq(&phba->hbalock);
11396         list_splice_init(&phba->fabric_iocb_list, &completions);
11397         spin_unlock_irq(&phba->hbalock);
11398
11399         /* Cancel all the IOCBs from the completions list */
11400         lpfc_sli_cancel_iocbs(phba, &completions, IOSTAT_LOCAL_REJECT,
11401                               IOERR_SLI_ABORTED);
11402 }
11403
11404 /**
11405  * lpfc_sli4_vport_delete_els_xri_aborted -Remove all ndlp references for vport
11406  * @vport: pointer to lpfc vport data structure.
11407  *
11408  * This routine is invoked by the vport cleanup for deletions and the cleanup
11409  * for an ndlp on removal.
11410  **/
11411 void
11412 lpfc_sli4_vport_delete_els_xri_aborted(struct lpfc_vport *vport)
11413 {
11414         struct lpfc_hba *phba = vport->phba;
11415         struct lpfc_sglq *sglq_entry = NULL, *sglq_next = NULL;
11416         struct lpfc_nodelist *ndlp = NULL;
11417         unsigned long iflag = 0;
11418
11419         spin_lock_irqsave(&phba->sli4_hba.sgl_list_lock, iflag);
11420         list_for_each_entry_safe(sglq_entry, sglq_next,
11421                         &phba->sli4_hba.lpfc_abts_els_sgl_list, list) {
11422                 if (sglq_entry->ndlp && sglq_entry->ndlp->vport == vport) {
11423                         lpfc_nlp_put(sglq_entry->ndlp);
11424                         ndlp = sglq_entry->ndlp;
11425                         sglq_entry->ndlp = NULL;
11426
11427                         /* If the xri on the abts_els_sgl list is for the Fport
11428                          * node and the vport is unloading, the xri aborted wcqe
11429                          * likely isn't coming back.  Just release the sgl.
11430                          */
11431                         if ((vport->load_flag & FC_UNLOADING) &&
11432                             ndlp->nlp_DID == Fabric_DID) {
11433                                 list_del(&sglq_entry->list);
11434                                 sglq_entry->state = SGL_FREED;
11435                                 list_add_tail(&sglq_entry->list,
11436                                         &phba->sli4_hba.lpfc_els_sgl_list);
11437                         }
11438                 }
11439         }
11440         spin_unlock_irqrestore(&phba->sli4_hba.sgl_list_lock, iflag);
11441         return;
11442 }
11443
11444 /**
11445  * lpfc_sli4_els_xri_aborted - Slow-path process of els xri abort
11446  * @phba: pointer to lpfc hba data structure.
11447  * @axri: pointer to the els xri abort wcqe structure.
11448  *
11449  * This routine is invoked by the worker thread to process a SLI4 slow-path
11450  * ELS aborted xri.
11451  **/
11452 void
11453 lpfc_sli4_els_xri_aborted(struct lpfc_hba *phba,
11454                           struct sli4_wcqe_xri_aborted *axri)
11455 {
11456         uint16_t xri = bf_get(lpfc_wcqe_xa_xri, axri);
11457         uint16_t rxid = bf_get(lpfc_wcqe_xa_remote_xid, axri);
11458         uint16_t lxri = 0;
11459
11460         struct lpfc_sglq *sglq_entry = NULL, *sglq_next = NULL;
11461         unsigned long iflag = 0;
11462         struct lpfc_nodelist *ndlp;
11463         struct lpfc_sli_ring *pring;
11464
11465         pring = lpfc_phba_elsring(phba);
11466
11467         spin_lock_irqsave(&phba->sli4_hba.sgl_list_lock, iflag);
11468         list_for_each_entry_safe(sglq_entry, sglq_next,
11469                         &phba->sli4_hba.lpfc_abts_els_sgl_list, list) {
11470                 if (sglq_entry->sli4_xritag == xri) {
11471                         list_del(&sglq_entry->list);
11472                         ndlp = sglq_entry->ndlp;
11473                         sglq_entry->ndlp = NULL;
11474                         list_add_tail(&sglq_entry->list,
11475                                 &phba->sli4_hba.lpfc_els_sgl_list);
11476                         sglq_entry->state = SGL_FREED;
11477                         spin_unlock_irqrestore(&phba->sli4_hba.sgl_list_lock,
11478                                                iflag);
11479
11480                         if (ndlp) {
11481                                 lpfc_set_rrq_active(phba, ndlp,
11482                                         sglq_entry->sli4_lxritag,
11483                                         rxid, 1);
11484                                 lpfc_nlp_put(ndlp);
11485                         }
11486
11487                         /* Check if TXQ queue needs to be serviced */
11488                         if (pring && !list_empty(&pring->txq))
11489                                 lpfc_worker_wake_up(phba);
11490                         return;
11491                 }
11492         }
11493         spin_unlock_irqrestore(&phba->sli4_hba.sgl_list_lock, iflag);
11494         lxri = lpfc_sli4_xri_inrange(phba, xri);
11495         if (lxri == NO_XRI)
11496                 return;
11497
11498         spin_lock_irqsave(&phba->hbalock, iflag);
11499         sglq_entry = __lpfc_get_active_sglq(phba, lxri);
11500         if (!sglq_entry || (sglq_entry->sli4_xritag != xri)) {
11501                 spin_unlock_irqrestore(&phba->hbalock, iflag);
11502                 return;
11503         }
11504         sglq_entry->state = SGL_XRI_ABORTED;
11505         spin_unlock_irqrestore(&phba->hbalock, iflag);
11506         return;
11507 }
11508
11509 /* lpfc_sli_abts_recover_port - Recover a port that failed a BLS_ABORT req.
11510  * @vport: pointer to virtual port object.
11511  * @ndlp: nodelist pointer for the impacted node.
11512  *
11513  * The driver calls this routine in response to an SLI4 XRI ABORT CQE
11514  * or an SLI3 ASYNC_STATUS_CN event from the port.  For either event,
11515  * the driver is required to send a LOGO to the remote node before it
11516  * attempts to recover its login to the remote node.
11517  */
11518 void
11519 lpfc_sli_abts_recover_port(struct lpfc_vport *vport,
11520                            struct lpfc_nodelist *ndlp)
11521 {
11522         struct Scsi_Host *shost;
11523         struct lpfc_hba *phba;
11524         unsigned long flags = 0;
11525
11526         shost = lpfc_shost_from_vport(vport);
11527         phba = vport->phba;
11528         if (ndlp->nlp_state != NLP_STE_MAPPED_NODE) {
11529                 lpfc_printf_log(phba, KERN_INFO,
11530                                 LOG_SLI, "3093 No rport recovery needed. "
11531                                 "rport in state 0x%x\n", ndlp->nlp_state);
11532                 return;
11533         }
11534         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
11535                         "3094 Start rport recovery on shost id 0x%x "
11536                         "fc_id 0x%06x vpi 0x%x rpi 0x%x state 0x%x "
11537                         "flags 0x%x\n",
11538                         shost->host_no, ndlp->nlp_DID,
11539                         vport->vpi, ndlp->nlp_rpi, ndlp->nlp_state,
11540                         ndlp->nlp_flag);
11541         /*
11542          * The rport is not responding.  Remove the FCP-2 flag to prevent
11543          * an ADISC in the follow-up recovery code.
11544          */
11545         spin_lock_irqsave(&ndlp->lock, flags);
11546         ndlp->nlp_fcp_info &= ~NLP_FCP_2_DEVICE;
11547         ndlp->nlp_flag |= NLP_ISSUE_LOGO;
11548         spin_unlock_irqrestore(&ndlp->lock, flags);
11549         lpfc_unreg_rpi(vport, ndlp);
11550 }
11551
11552 static void lpfc_init_cs_ctl_bitmap(struct lpfc_vport *vport)
11553 {
11554         bitmap_zero(vport->vmid_priority_range, LPFC_VMID_MAX_PRIORITY_RANGE);
11555 }
11556
11557 static void
11558 lpfc_vmid_set_cs_ctl_range(struct lpfc_vport *vport, u32 min, u32 max)
11559 {
11560         u32 i;
11561
11562         if ((min > max) || (max > LPFC_VMID_MAX_PRIORITY_RANGE))
11563                 return;
11564
11565         for (i = min; i <= max; i++)
11566                 set_bit(i, vport->vmid_priority_range);
11567 }
11568
11569 static void lpfc_vmid_put_cs_ctl(struct lpfc_vport *vport, u32 ctcl_vmid)
11570 {
11571         set_bit(ctcl_vmid, vport->vmid_priority_range);
11572 }
11573
11574 u32 lpfc_vmid_get_cs_ctl(struct lpfc_vport *vport)
11575 {
11576         u32 i;
11577
11578         i = find_first_bit(vport->vmid_priority_range,
11579                            LPFC_VMID_MAX_PRIORITY_RANGE);
11580
11581         if (i == LPFC_VMID_MAX_PRIORITY_RANGE)
11582                 return 0;
11583
11584         clear_bit(i, vport->vmid_priority_range);
11585         return i;
11586 }
11587
11588 #define MAX_PRIORITY_DESC       255
11589
11590 static void
11591 lpfc_cmpl_els_qfpa(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
11592                    struct lpfc_iocbq *rspiocb)
11593 {
11594         struct lpfc_vport *vport = cmdiocb->vport;
11595         struct priority_range_desc *desc;
11596         struct lpfc_dmabuf *prsp = NULL;
11597         struct lpfc_vmid_priority_range *vmid_range = NULL;
11598         u32 *data;
11599         struct lpfc_dmabuf *dmabuf = cmdiocb->context2;
11600         IOCB_t *irsp = &rspiocb->iocb;
11601         u8 *pcmd, max_desc;
11602         u32 len, i;
11603         struct lpfc_nodelist *ndlp = (struct lpfc_nodelist *)cmdiocb->context1;
11604
11605         prsp = list_get_first(&dmabuf->list, struct lpfc_dmabuf, list);
11606         if (!prsp)
11607                 goto out;
11608
11609         pcmd = prsp->virt;
11610         data = (u32 *)pcmd;
11611         if (data[0] == ELS_CMD_LS_RJT) {
11612                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_SLI,
11613                                  "3277 QFPA LS_RJT x%x  x%x\n",
11614                                  data[0], data[1]);
11615                 goto out;
11616         }
11617         if (irsp->ulpStatus) {
11618                 lpfc_printf_vlog(vport, KERN_ERR, LOG_SLI,
11619                                  "6529 QFPA failed with status x%x  x%x\n",
11620                                  irsp->ulpStatus, irsp->un.ulpWord[4]);
11621                 goto out;
11622         }
11623
11624         if (!vport->qfpa_res) {
11625                 max_desc = FCELSSIZE / sizeof(*vport->qfpa_res);
11626                 vport->qfpa_res = kcalloc(max_desc, sizeof(*vport->qfpa_res),
11627                                           GFP_KERNEL);
11628                 if (!vport->qfpa_res)
11629                         goto out;
11630         }
11631
11632         len = *((u32 *)(pcmd + 4));
11633         len = be32_to_cpu(len);
11634         memcpy(vport->qfpa_res, pcmd, len + 8);
11635         len = len / LPFC_PRIORITY_RANGE_DESC_SIZE;
11636
11637         desc = (struct priority_range_desc *)(pcmd + 8);
11638         vmid_range = vport->vmid_priority.vmid_range;
11639         if (!vmid_range) {
11640                 vmid_range = kcalloc(MAX_PRIORITY_DESC, sizeof(*vmid_range),
11641                                      GFP_KERNEL);
11642                 if (!vmid_range) {
11643                         kfree(vport->qfpa_res);
11644                         goto out;
11645                 }
11646                 vport->vmid_priority.vmid_range = vmid_range;
11647         }
11648         vport->vmid_priority.num_descriptors = len;
11649
11650         for (i = 0; i < len; i++, vmid_range++, desc++) {
11651                 lpfc_printf_vlog(vport, KERN_DEBUG, LOG_ELS,
11652                                  "6539 vmid values low=%d, high=%d, qos=%d, "
11653                                  "local ve id=%d\n", desc->lo_range,
11654                                  desc->hi_range, desc->qos_priority,
11655                                  desc->local_ve_id);
11656
11657                 vmid_range->low = desc->lo_range << 1;
11658                 if (desc->local_ve_id == QFPA_ODD_ONLY)
11659                         vmid_range->low++;
11660                 if (desc->qos_priority)
11661                         vport->vmid_flag |= LPFC_VMID_QOS_ENABLED;
11662                 vmid_range->qos = desc->qos_priority;
11663
11664                 vmid_range->high = desc->hi_range << 1;
11665                 if ((desc->local_ve_id == QFPA_ODD_ONLY) ||
11666                     (desc->local_ve_id == QFPA_EVEN_ODD))
11667                         vmid_range->high++;
11668         }
11669         lpfc_init_cs_ctl_bitmap(vport);
11670         for (i = 0; i < vport->vmid_priority.num_descriptors; i++) {
11671                 lpfc_vmid_set_cs_ctl_range(vport,
11672                                 vport->vmid_priority.vmid_range[i].low,
11673                                 vport->vmid_priority.vmid_range[i].high);
11674         }
11675
11676         vport->vmid_flag |= LPFC_VMID_QFPA_CMPL;
11677  out:
11678         lpfc_els_free_iocb(phba, cmdiocb);
11679         lpfc_nlp_put(ndlp);
11680 }
11681
11682 int lpfc_issue_els_qfpa(struct lpfc_vport *vport)
11683 {
11684         struct lpfc_hba *phba = vport->phba;
11685         struct lpfc_nodelist *ndlp;
11686         struct lpfc_iocbq *elsiocb;
11687         u8 *pcmd;
11688         int ret;
11689
11690         ndlp = lpfc_findnode_did(phba->pport, Fabric_DID);
11691         if (!ndlp || ndlp->nlp_state != NLP_STE_UNMAPPED_NODE)
11692                 return -ENXIO;
11693
11694         elsiocb = lpfc_prep_els_iocb(vport, 1, LPFC_QFPA_SIZE, 2, ndlp,
11695                                      ndlp->nlp_DID, ELS_CMD_QFPA);
11696         if (!elsiocb)
11697                 return -ENOMEM;
11698
11699         pcmd = (u8 *)(((struct lpfc_dmabuf *)elsiocb->context2)->virt);
11700
11701         *((u32 *)(pcmd)) = ELS_CMD_QFPA;
11702         pcmd += 4;
11703
11704         elsiocb->iocb_cmpl = lpfc_cmpl_els_qfpa;
11705
11706         elsiocb->context1 = lpfc_nlp_get(ndlp);
11707         if (!elsiocb->context1) {
11708                 lpfc_els_free_iocb(vport->phba, elsiocb);
11709                 return -ENXIO;
11710         }
11711
11712         ret = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 2);
11713         if (ret != IOCB_SUCCESS) {
11714                 lpfc_els_free_iocb(phba, elsiocb);
11715                 lpfc_nlp_put(ndlp);
11716                 return -EIO;
11717         }
11718         vport->vmid_flag &= ~LPFC_VMID_QOS_ENABLED;
11719         return 0;
11720 }
11721
11722 int
11723 lpfc_vmid_uvem(struct lpfc_vport *vport,
11724                struct lpfc_vmid *vmid, bool instantiated)
11725 {
11726         struct lpfc_vem_id_desc *vem_id_desc;
11727         struct lpfc_nodelist *ndlp;
11728         struct lpfc_iocbq *elsiocb;
11729         struct instantiated_ve_desc *inst_desc;
11730         struct lpfc_vmid_context *vmid_context;
11731         u8 *pcmd;
11732         u32 *len;
11733         int ret = 0;
11734
11735         ndlp = lpfc_findnode_did(vport, Fabric_DID);
11736         if (!ndlp || ndlp->nlp_state != NLP_STE_UNMAPPED_NODE)
11737                 return -ENXIO;
11738
11739         vmid_context = kmalloc(sizeof(*vmid_context), GFP_KERNEL);
11740         if (!vmid_context)
11741                 return -ENOMEM;
11742         elsiocb = lpfc_prep_els_iocb(vport, 1, LPFC_UVEM_SIZE, 2,
11743                                      ndlp, Fabric_DID, ELS_CMD_UVEM);
11744         if (!elsiocb)
11745                 goto out;
11746
11747         lpfc_printf_vlog(vport, KERN_DEBUG, LOG_ELS,
11748                          "3427 Host vmid %s %d\n",
11749                          vmid->host_vmid, instantiated);
11750         vmid_context->vmp = vmid;
11751         vmid_context->nlp = ndlp;
11752         vmid_context->instantiated = instantiated;
11753         elsiocb->vmid_tag.vmid_context = vmid_context;
11754         pcmd = (u8 *)(((struct lpfc_dmabuf *)elsiocb->context2)->virt);
11755
11756         if (uuid_is_null((uuid_t *)vport->lpfc_vmid_host_uuid))
11757                 memcpy(vport->lpfc_vmid_host_uuid, vmid->host_vmid,
11758                        LPFC_COMPRESS_VMID_SIZE);
11759
11760         *((u32 *)(pcmd)) = ELS_CMD_UVEM;
11761         len = (u32 *)(pcmd + 4);
11762         *len = cpu_to_be32(LPFC_UVEM_SIZE - 8);
11763
11764         vem_id_desc = (struct lpfc_vem_id_desc *)(pcmd + 8);
11765         vem_id_desc->tag = be32_to_cpu(VEM_ID_DESC_TAG);
11766         vem_id_desc->length = be32_to_cpu(LPFC_UVEM_VEM_ID_DESC_SIZE);
11767         memcpy(vem_id_desc->vem_id, vport->lpfc_vmid_host_uuid,
11768                LPFC_COMPRESS_VMID_SIZE);
11769
11770         inst_desc = (struct instantiated_ve_desc *)(pcmd + 32);
11771         inst_desc->tag = be32_to_cpu(INSTANTIATED_VE_DESC_TAG);
11772         inst_desc->length = be32_to_cpu(LPFC_UVEM_VE_MAP_DESC_SIZE);
11773         memcpy(inst_desc->global_vem_id, vmid->host_vmid,
11774                LPFC_COMPRESS_VMID_SIZE);
11775
11776         bf_set(lpfc_instantiated_nport_id, inst_desc, vport->fc_myDID);
11777         bf_set(lpfc_instantiated_local_id, inst_desc,
11778                vmid->un.cs_ctl_vmid);
11779         if (instantiated) {
11780                 inst_desc->tag = be32_to_cpu(INSTANTIATED_VE_DESC_TAG);
11781         } else {
11782                 inst_desc->tag = be32_to_cpu(DEINSTANTIATED_VE_DESC_TAG);
11783                 lpfc_vmid_put_cs_ctl(vport, vmid->un.cs_ctl_vmid);
11784         }
11785         inst_desc->word6 = cpu_to_be32(inst_desc->word6);
11786
11787         elsiocb->iocb_cmpl = lpfc_cmpl_els_uvem;
11788
11789         elsiocb->context1 = lpfc_nlp_get(ndlp);
11790         if (!elsiocb->context1) {
11791                 lpfc_els_free_iocb(vport->phba, elsiocb);
11792                 goto out;
11793         }
11794
11795         ret = lpfc_sli_issue_iocb(vport->phba, LPFC_ELS_RING, elsiocb, 0);
11796         if (ret != IOCB_SUCCESS) {
11797                 lpfc_els_free_iocb(vport->phba, elsiocb);
11798                 lpfc_nlp_put(ndlp);
11799                 goto out;
11800         }
11801
11802         return 0;
11803  out:
11804         kfree(vmid_context);
11805         return -EIO;
11806 }
11807
11808 static void
11809 lpfc_cmpl_els_uvem(struct lpfc_hba *phba, struct lpfc_iocbq *icmdiocb,
11810                    struct lpfc_iocbq *rspiocb)
11811 {
11812         struct lpfc_vport *vport = icmdiocb->vport;
11813         struct lpfc_dmabuf *prsp = NULL;
11814         struct lpfc_vmid_context *vmid_context =
11815             icmdiocb->vmid_tag.vmid_context;
11816         struct lpfc_nodelist *ndlp = icmdiocb->context1;
11817         u8 *pcmd;
11818         u32 *data;
11819         IOCB_t *irsp = &rspiocb->iocb;
11820         struct lpfc_dmabuf *dmabuf = icmdiocb->context2;
11821         struct lpfc_vmid *vmid;
11822
11823         vmid = vmid_context->vmp;
11824         if (!ndlp || ndlp->nlp_state != NLP_STE_UNMAPPED_NODE)
11825                 ndlp = NULL;
11826
11827         prsp = list_get_first(&dmabuf->list, struct lpfc_dmabuf, list);
11828         if (!prsp)
11829                 goto out;
11830         pcmd = prsp->virt;
11831         data = (u32 *)pcmd;
11832         if (data[0] == ELS_CMD_LS_RJT) {
11833                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_SLI,
11834                                  "4532 UVEM LS_RJT %x %x\n", data[0], data[1]);
11835                 goto out;
11836         }
11837         if (irsp->ulpStatus) {
11838                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_SLI,
11839                                  "4533 UVEM error status %x: %x\n",
11840                                  irsp->ulpStatus, irsp->un.ulpWord[4]);
11841                 goto out;
11842         }
11843         spin_lock(&phba->hbalock);
11844         /* Set IN USE flag */
11845         vport->vmid_flag |= LPFC_VMID_IN_USE;
11846         phba->pport->vmid_flag |= LPFC_VMID_IN_USE;
11847         spin_unlock(&phba->hbalock);
11848
11849         if (vmid_context->instantiated) {
11850                 write_lock(&vport->vmid_lock);
11851                 vmid->flag |= LPFC_VMID_REGISTERED;
11852                 vmid->flag &= ~LPFC_VMID_REQ_REGISTER;
11853                 write_unlock(&vport->vmid_lock);
11854         }
11855
11856  out:
11857         kfree(vmid_context);
11858         lpfc_els_free_iocb(phba, icmdiocb);
11859         lpfc_nlp_put(ndlp);
11860 }