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                                     FC_PT2PT_NO_NVME);
1077                 spin_unlock_irq(shost->host_lock);
1078
1079                 /* If private loop, then allow max outstanding els to be
1080                  * LPFC_MAX_DISC_THREADS (32). Scanning in the case of no
1081                  * alpa map would take too long otherwise.
1082                  */
1083                 if (phba->alpa_map[0] == 0)
1084                         vport->cfg_discovery_threads = LPFC_MAX_DISC_THREADS;
1085                 if ((phba->sli_rev == LPFC_SLI_REV4) &&
1086                     (!(vport->fc_flag & FC_VFI_REGISTERED) ||
1087                      (vport->fc_prevDID != vport->fc_myDID) ||
1088                         phba->fc_topology_changed)) {
1089                         if (vport->fc_flag & FC_VFI_REGISTERED) {
1090                                 if (phba->fc_topology_changed) {
1091                                         lpfc_unregister_fcf_prep(phba);
1092                                         spin_lock_irq(shost->host_lock);
1093                                         vport->fc_flag &= ~FC_VFI_REGISTERED;
1094                                         spin_unlock_irq(shost->host_lock);
1095                                         phba->fc_topology_changed = 0;
1096                                 } else {
1097                                         lpfc_sli4_unreg_all_rpis(vport);
1098                                 }
1099                         }
1100
1101                         /* Do not register VFI if the driver aborted FLOGI */
1102                         if (!lpfc_error_lost_link(irsp))
1103                                 lpfc_issue_reg_vfi(vport);
1104
1105                         lpfc_nlp_put(ndlp);
1106                         goto out;
1107                 }
1108                 goto flogifail;
1109         }
1110         spin_lock_irq(shost->host_lock);
1111         vport->fc_flag &= ~FC_VPORT_CVL_RCVD;
1112         vport->fc_flag &= ~FC_VPORT_LOGO_RCVD;
1113         spin_unlock_irq(shost->host_lock);
1114
1115         /*
1116          * The FLogI succeeded.  Sync the data for the CPU before
1117          * accessing it.
1118          */
1119         prsp = list_get_first(&pcmd->list, struct lpfc_dmabuf, list);
1120         if (!prsp)
1121                 goto out;
1122         sp = prsp->virt + sizeof(uint32_t);
1123
1124         /* FLOGI completes successfully */
1125         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
1126                          "0101 FLOGI completes successfully, I/O tag:x%x, "
1127                          "xri x%x Data: x%x x%x x%x x%x x%x x%x x%x %d\n",
1128                          cmdiocb->iotag, cmdiocb->sli4_xritag,
1129                          irsp->un.ulpWord[4], sp->cmn.e_d_tov,
1130                          sp->cmn.w2.r_a_tov, sp->cmn.edtovResolution,
1131                          vport->port_state, vport->fc_flag,
1132                          sp->cmn.priority_tagging, kref_read(&ndlp->kref));
1133
1134         if (sp->cmn.priority_tagging)
1135                 vport->vmid_flag |= LPFC_VMID_ISSUE_QFPA;
1136
1137         if (vport->port_state == LPFC_FLOGI) {
1138                 /*
1139                  * If Common Service Parameters indicate Nport
1140                  * we are point to point, if Fport we are Fabric.
1141                  */
1142                 if (sp->cmn.fPort)
1143                         rc = lpfc_cmpl_els_flogi_fabric(vport, ndlp, sp, irsp);
1144                 else if (!(phba->hba_flag & HBA_FCOE_MODE))
1145                         rc = lpfc_cmpl_els_flogi_nport(vport, ndlp, sp);
1146                 else {
1147                         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
1148                                 "2831 FLOGI response with cleared Fabric "
1149                                 "bit fcf_index 0x%x "
1150                                 "Switch Name %02x%02x%02x%02x%02x%02x%02x%02x "
1151                                 "Fabric Name "
1152                                 "%02x%02x%02x%02x%02x%02x%02x%02x\n",
1153                                 phba->fcf.current_rec.fcf_indx,
1154                                 phba->fcf.current_rec.switch_name[0],
1155                                 phba->fcf.current_rec.switch_name[1],
1156                                 phba->fcf.current_rec.switch_name[2],
1157                                 phba->fcf.current_rec.switch_name[3],
1158                                 phba->fcf.current_rec.switch_name[4],
1159                                 phba->fcf.current_rec.switch_name[5],
1160                                 phba->fcf.current_rec.switch_name[6],
1161                                 phba->fcf.current_rec.switch_name[7],
1162                                 phba->fcf.current_rec.fabric_name[0],
1163                                 phba->fcf.current_rec.fabric_name[1],
1164                                 phba->fcf.current_rec.fabric_name[2],
1165                                 phba->fcf.current_rec.fabric_name[3],
1166                                 phba->fcf.current_rec.fabric_name[4],
1167                                 phba->fcf.current_rec.fabric_name[5],
1168                                 phba->fcf.current_rec.fabric_name[6],
1169                                 phba->fcf.current_rec.fabric_name[7]);
1170
1171                         lpfc_nlp_put(ndlp);
1172                         spin_lock_irq(&phba->hbalock);
1173                         phba->fcf.fcf_flag &= ~FCF_DISCOVERY;
1174                         phba->hba_flag &= ~(FCF_RR_INPROG | HBA_DEVLOSS_TMO);
1175                         spin_unlock_irq(&phba->hbalock);
1176                         phba->fcf.fcf_redisc_attempted = 0; /* reset */
1177                         goto out;
1178                 }
1179                 if (!rc) {
1180                         /* Mark the FCF discovery process done */
1181                         if (phba->hba_flag & HBA_FIP_SUPPORT)
1182                                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FIP |
1183                                                 LOG_ELS,
1184                                                 "2769 FLOGI to FCF (x%x) "
1185                                                 "completed successfully\n",
1186                                                 phba->fcf.current_rec.fcf_indx);
1187                         spin_lock_irq(&phba->hbalock);
1188                         phba->fcf.fcf_flag &= ~FCF_DISCOVERY;
1189                         phba->hba_flag &= ~(FCF_RR_INPROG | HBA_DEVLOSS_TMO);
1190                         spin_unlock_irq(&phba->hbalock);
1191                         phba->fcf.fcf_redisc_attempted = 0; /* reset */
1192                         goto out;
1193                 }
1194         } else if (vport->port_state > LPFC_FLOGI &&
1195                    vport->fc_flag & FC_PT2PT) {
1196                 /*
1197                  * In a p2p topology, it is possible that discovery has
1198                  * already progressed, and this completion can be ignored.
1199                  * Recheck the indicated topology.
1200                  */
1201                 if (!sp->cmn.fPort)
1202                         goto out;
1203         }
1204
1205 flogifail:
1206         spin_lock_irq(&phba->hbalock);
1207         phba->fcf.fcf_flag &= ~FCF_DISCOVERY;
1208         spin_unlock_irq(&phba->hbalock);
1209
1210         if (!lpfc_error_lost_link(irsp)) {
1211                 /* FLOGI failed, so just use loop map to make discovery list */
1212                 lpfc_disc_list_loopmap(vport);
1213
1214                 /* Start discovery */
1215                 lpfc_disc_start(vport);
1216         } else if (((irsp->ulpStatus != IOSTAT_LOCAL_REJECT) ||
1217                         (((irsp->un.ulpWord[4] & IOERR_PARAM_MASK) !=
1218                          IOERR_SLI_ABORTED) &&
1219                         ((irsp->un.ulpWord[4] & IOERR_PARAM_MASK) !=
1220                          IOERR_SLI_DOWN))) &&
1221                         (phba->link_state != LPFC_CLEAR_LA)) {
1222                 /* If FLOGI failed enable link interrupt. */
1223                 lpfc_issue_clear_la(phba, vport);
1224         }
1225 out:
1226         phba->hba_flag &= ~HBA_FLOGI_OUTSTANDING;
1227         lpfc_els_free_iocb(phba, cmdiocb);
1228         lpfc_nlp_put(ndlp);
1229 }
1230
1231 /**
1232  * lpfc_cmpl_els_link_down - Completion callback function for ELS command
1233  *                           aborted during a link down
1234  * @phba: pointer to lpfc hba data structure.
1235  * @cmdiocb: pointer to lpfc command iocb data structure.
1236  * @rspiocb: pointer to lpfc response iocb data structure.
1237  *
1238  */
1239 static void
1240 lpfc_cmpl_els_link_down(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
1241                         struct lpfc_iocbq *rspiocb)
1242 {
1243         IOCB_t *irsp;
1244         uint32_t *pcmd;
1245         uint32_t cmd;
1246
1247         pcmd = (uint32_t *)(((struct lpfc_dmabuf *)cmdiocb->context2)->virt);
1248         cmd = *pcmd;
1249         irsp = &rspiocb->iocb;
1250
1251         lpfc_printf_log(phba, KERN_INFO, LOG_ELS,
1252                         "6445 ELS completes after LINK_DOWN: "
1253                         " Status %x/%x cmd x%x flg x%x\n",
1254                         irsp->ulpStatus, irsp->un.ulpWord[4], cmd,
1255                         cmdiocb->iocb_flag);
1256
1257         if (cmdiocb->iocb_flag & LPFC_IO_FABRIC) {
1258                 cmdiocb->iocb_flag &= ~LPFC_IO_FABRIC;
1259                 atomic_dec(&phba->fabric_iocb_count);
1260         }
1261         lpfc_els_free_iocb(phba, cmdiocb);
1262 }
1263
1264 /**
1265  * lpfc_issue_els_flogi - Issue an flogi iocb command for a vport
1266  * @vport: pointer to a host virtual N_Port data structure.
1267  * @ndlp: pointer to a node-list data structure.
1268  * @retry: number of retries to the command IOCB.
1269  *
1270  * This routine issues a Fabric Login (FLOGI) Request ELS command
1271  * for a @vport. The initiator service parameters are put into the payload
1272  * of the FLOGI Request IOCB and the top-level callback function pointer
1273  * to lpfc_cmpl_els_flogi() routine is put to the IOCB completion callback
1274  * function field. The lpfc_issue_fabric_iocb routine is invoked to send
1275  * out FLOGI ELS command with one outstanding fabric IOCB at a time.
1276  *
1277  * Note that the ndlp reference count will be incremented by 1 for holding the
1278  * ndlp and the reference to ndlp will be stored into the context1 field of
1279  * the IOCB for the completion callback function to the FLOGI ELS command.
1280  *
1281  * Return code
1282  *   0 - successfully issued flogi iocb for @vport
1283  *   1 - failed to issue flogi iocb for @vport
1284  **/
1285 static int
1286 lpfc_issue_els_flogi(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1287                      uint8_t retry)
1288 {
1289         struct lpfc_hba  *phba = vport->phba;
1290         struct serv_parm *sp;
1291         IOCB_t *icmd;
1292         struct lpfc_iocbq *elsiocb;
1293         struct lpfc_iocbq defer_flogi_acc;
1294         uint8_t *pcmd;
1295         uint16_t cmdsize;
1296         uint32_t tmo, did;
1297         int rc;
1298
1299         cmdsize = (sizeof(uint32_t) + sizeof(struct serv_parm));
1300         elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, retry, ndlp,
1301                                      ndlp->nlp_DID, ELS_CMD_FLOGI);
1302
1303         if (!elsiocb)
1304                 return 1;
1305
1306         icmd = &elsiocb->iocb;
1307         pcmd = (uint8_t *) (((struct lpfc_dmabuf *) elsiocb->context2)->virt);
1308
1309         /* For FLOGI request, remainder of payload is service parameters */
1310         *((uint32_t *) (pcmd)) = ELS_CMD_FLOGI;
1311         pcmd += sizeof(uint32_t);
1312         memcpy(pcmd, &vport->fc_sparam, sizeof(struct serv_parm));
1313         sp = (struct serv_parm *) pcmd;
1314
1315         /* Setup CSPs accordingly for Fabric */
1316         sp->cmn.e_d_tov = 0;
1317         sp->cmn.w2.r_a_tov = 0;
1318         sp->cmn.virtual_fabric_support = 0;
1319         sp->cls1.classValid = 0;
1320         if (sp->cmn.fcphLow < FC_PH3)
1321                 sp->cmn.fcphLow = FC_PH3;
1322         if (sp->cmn.fcphHigh < FC_PH3)
1323                 sp->cmn.fcphHigh = FC_PH3;
1324
1325         /* Determine if switch supports priority tagging */
1326         if (phba->cfg_vmid_priority_tagging) {
1327                 sp->cmn.priority_tagging = 1;
1328                 /* lpfc_vmid_host_uuid is combination of wwpn and wwnn */
1329                 if (uuid_is_null((uuid_t *)vport->lpfc_vmid_host_uuid)) {
1330                         memcpy(vport->lpfc_vmid_host_uuid, phba->wwpn,
1331                                sizeof(phba->wwpn));
1332                         memcpy(&vport->lpfc_vmid_host_uuid[8], phba->wwnn,
1333                                sizeof(phba->wwnn));
1334                 }
1335         }
1336
1337         if  (phba->sli_rev == LPFC_SLI_REV4) {
1338                 if (bf_get(lpfc_sli_intf_if_type, &phba->sli4_hba.sli_intf) ==
1339                     LPFC_SLI_INTF_IF_TYPE_0) {
1340                         elsiocb->iocb.ulpCt_h = ((SLI4_CT_FCFI >> 1) & 1);
1341                         elsiocb->iocb.ulpCt_l = (SLI4_CT_FCFI & 1);
1342                         /* FLOGI needs to be 3 for WQE FCFI */
1343                         /* Set the fcfi to the fcfi we registered with */
1344                         elsiocb->iocb.ulpContext = phba->fcf.fcfi;
1345                 }
1346                 /* Can't do SLI4 class2 without support sequence coalescing */
1347                 sp->cls2.classValid = 0;
1348                 sp->cls2.seqDelivery = 0;
1349         } else {
1350                 /* Historical, setting sequential-delivery bit for SLI3 */
1351                 sp->cls2.seqDelivery = (sp->cls2.classValid) ? 1 : 0;
1352                 sp->cls3.seqDelivery = (sp->cls3.classValid) ? 1 : 0;
1353                 if (phba->sli3_options & LPFC_SLI3_NPIV_ENABLED) {
1354                         sp->cmn.request_multiple_Nport = 1;
1355                         /* For FLOGI, Let FLOGI rsp set the NPortID for VPI 0 */
1356                         icmd->ulpCt_h = 1;
1357                         icmd->ulpCt_l = 0;
1358                 } else
1359                         sp->cmn.request_multiple_Nport = 0;
1360         }
1361
1362         if (phba->fc_topology != LPFC_TOPOLOGY_LOOP) {
1363                 icmd->un.elsreq64.myID = 0;
1364                 icmd->un.elsreq64.fl = 1;
1365         }
1366
1367         tmo = phba->fc_ratov;
1368         phba->fc_ratov = LPFC_DISC_FLOGI_TMO;
1369         lpfc_set_disctmo(vport);
1370         phba->fc_ratov = tmo;
1371
1372         phba->fc_stat.elsXmitFLOGI++;
1373         elsiocb->iocb_cmpl = lpfc_cmpl_els_flogi;
1374
1375         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
1376                 "Issue FLOGI:     opt:x%x",
1377                 phba->sli3_options, 0, 0);
1378
1379         elsiocb->context1 = lpfc_nlp_get(ndlp);
1380         if (!elsiocb->context1) {
1381                 lpfc_els_free_iocb(phba, elsiocb);
1382                 return 1;
1383         }
1384
1385         rc = lpfc_issue_fabric_iocb(phba, elsiocb);
1386         if (rc == IOCB_ERROR) {
1387                 lpfc_els_free_iocb(phba, elsiocb);
1388                 lpfc_nlp_put(ndlp);
1389                 return 1;
1390         }
1391
1392         phba->hba_flag |= (HBA_FLOGI_ISSUED | HBA_FLOGI_OUTSTANDING);
1393
1394         /* Check for a deferred FLOGI ACC condition */
1395         if (phba->defer_flogi_acc_flag) {
1396                 did = vport->fc_myDID;
1397                 vport->fc_myDID = Fabric_DID;
1398
1399                 memset(&defer_flogi_acc, 0, sizeof(struct lpfc_iocbq));
1400
1401                 defer_flogi_acc.iocb.ulpContext = phba->defer_flogi_acc_rx_id;
1402                 defer_flogi_acc.iocb.unsli3.rcvsli3.ox_id =
1403                                                 phba->defer_flogi_acc_ox_id;
1404
1405                 lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
1406                                  "3354 Xmit deferred FLOGI ACC: rx_id: x%x,"
1407                                  " ox_id: x%x, hba_flag x%x\n",
1408                                  phba->defer_flogi_acc_rx_id,
1409                                  phba->defer_flogi_acc_ox_id, phba->hba_flag);
1410
1411                 /* Send deferred FLOGI ACC */
1412                 lpfc_els_rsp_acc(vport, ELS_CMD_FLOGI, &defer_flogi_acc,
1413                                  ndlp, NULL);
1414
1415                 phba->defer_flogi_acc_flag = false;
1416
1417                 vport->fc_myDID = did;
1418         }
1419
1420         return 0;
1421 }
1422
1423 /**
1424  * lpfc_els_abort_flogi - Abort all outstanding flogi iocbs
1425  * @phba: pointer to lpfc hba data structure.
1426  *
1427  * This routine aborts all the outstanding Fabric Login (FLOGI) IOCBs
1428  * with a @phba. This routine walks all the outstanding IOCBs on the txcmplq
1429  * list and issues an abort IOCB commond on each outstanding IOCB that
1430  * contains a active Fabric_DID ndlp. Note that this function is to issue
1431  * the abort IOCB command on all the outstanding IOCBs, thus when this
1432  * function returns, it does not guarantee all the IOCBs are actually aborted.
1433  *
1434  * Return code
1435  *   0 - Successfully issued abort iocb on all outstanding flogis (Always 0)
1436  **/
1437 int
1438 lpfc_els_abort_flogi(struct lpfc_hba *phba)
1439 {
1440         struct lpfc_sli_ring *pring;
1441         struct lpfc_iocbq *iocb, *next_iocb;
1442         struct lpfc_nodelist *ndlp;
1443         IOCB_t *icmd;
1444
1445         /* Abort outstanding I/O on NPort <nlp_DID> */
1446         lpfc_printf_log(phba, KERN_INFO, LOG_DISCOVERY,
1447                         "0201 Abort outstanding I/O on NPort x%x\n",
1448                         Fabric_DID);
1449
1450         pring = lpfc_phba_elsring(phba);
1451         if (unlikely(!pring))
1452                 return -EIO;
1453
1454         /*
1455          * Check the txcmplq for an iocb that matches the nport the driver is
1456          * searching for.
1457          */
1458         spin_lock_irq(&phba->hbalock);
1459         list_for_each_entry_safe(iocb, next_iocb, &pring->txcmplq, list) {
1460                 icmd = &iocb->iocb;
1461                 if (icmd->ulpCommand == CMD_ELS_REQUEST64_CR) {
1462                         ndlp = (struct lpfc_nodelist *)(iocb->context1);
1463                         if (ndlp && ndlp->nlp_DID == Fabric_DID) {
1464                                 if ((phba->pport->fc_flag & FC_PT2PT) &&
1465                                     !(phba->pport->fc_flag & FC_PT2PT_PLOGI))
1466                                         iocb->fabric_iocb_cmpl =
1467                                                 lpfc_ignore_els_cmpl;
1468                                 lpfc_sli_issue_abort_iotag(phba, pring, iocb,
1469                                                            NULL);
1470                         }
1471                 }
1472         }
1473         /* Make sure HBA is alive */
1474         lpfc_issue_hb_tmo(phba);
1475
1476         spin_unlock_irq(&phba->hbalock);
1477
1478         return 0;
1479 }
1480
1481 /**
1482  * lpfc_initial_flogi - Issue an initial fabric login for a vport
1483  * @vport: pointer to a host virtual N_Port data structure.
1484  *
1485  * This routine issues an initial Fabric Login (FLOGI) for the @vport
1486  * specified. It first searches the ndlp with the Fabric_DID (0xfffffe) from
1487  * the @vport's ndlp list. If no such ndlp found, it will create an ndlp and
1488  * put it into the @vport's ndlp list. If an inactive ndlp found on the list,
1489  * it will just be enabled and made active. The lpfc_issue_els_flogi() routine
1490  * is then invoked with the @vport and the ndlp to perform the FLOGI for the
1491  * @vport.
1492  *
1493  * Return code
1494  *   0 - failed to issue initial flogi for @vport
1495  *   1 - successfully issued initial flogi for @vport
1496  **/
1497 int
1498 lpfc_initial_flogi(struct lpfc_vport *vport)
1499 {
1500         struct lpfc_nodelist *ndlp;
1501
1502         vport->port_state = LPFC_FLOGI;
1503         lpfc_set_disctmo(vport);
1504
1505         /* First look for the Fabric ndlp */
1506         ndlp = lpfc_findnode_did(vport, Fabric_DID);
1507         if (!ndlp) {
1508                 /* Cannot find existing Fabric ndlp, so allocate a new one */
1509                 ndlp = lpfc_nlp_init(vport, Fabric_DID);
1510                 if (!ndlp)
1511                         return 0;
1512                 /* Set the node type */
1513                 ndlp->nlp_type |= NLP_FABRIC;
1514
1515                 /* Put ndlp onto node list */
1516                 lpfc_enqueue_node(vport, ndlp);
1517         }
1518
1519         if (lpfc_issue_els_flogi(vport, ndlp, 0)) {
1520                 /* This decrement of reference count to node shall kick off
1521                  * the release of the node.
1522                  */
1523                 lpfc_nlp_put(ndlp);
1524                 return 0;
1525         }
1526         return 1;
1527 }
1528
1529 /**
1530  * lpfc_initial_fdisc - Issue an initial fabric discovery for a vport
1531  * @vport: pointer to a host virtual N_Port data structure.
1532  *
1533  * This routine issues an initial Fabric Discover (FDISC) for the @vport
1534  * specified. It first searches the ndlp with the Fabric_DID (0xfffffe) from
1535  * the @vport's ndlp list. If no such ndlp found, it will create an ndlp and
1536  * put it into the @vport's ndlp list. If an inactive ndlp found on the list,
1537  * it will just be enabled and made active. The lpfc_issue_els_fdisc() routine
1538  * is then invoked with the @vport and the ndlp to perform the FDISC for the
1539  * @vport.
1540  *
1541  * Return code
1542  *   0 - failed to issue initial fdisc for @vport
1543  *   1 - successfully issued initial fdisc for @vport
1544  **/
1545 int
1546 lpfc_initial_fdisc(struct lpfc_vport *vport)
1547 {
1548         struct lpfc_nodelist *ndlp;
1549
1550         /* First look for the Fabric ndlp */
1551         ndlp = lpfc_findnode_did(vport, Fabric_DID);
1552         if (!ndlp) {
1553                 /* Cannot find existing Fabric ndlp, so allocate a new one */
1554                 ndlp = lpfc_nlp_init(vport, Fabric_DID);
1555                 if (!ndlp)
1556                         return 0;
1557
1558                 /* NPIV is only supported in Fabrics. */
1559                 ndlp->nlp_type |= NLP_FABRIC;
1560
1561                 /* Put ndlp onto node list */
1562                 lpfc_enqueue_node(vport, ndlp);
1563         }
1564
1565         if (lpfc_issue_els_fdisc(vport, ndlp, 0)) {
1566                 /* decrement node reference count to trigger the release of
1567                  * the node.
1568                  */
1569                 lpfc_nlp_put(ndlp);
1570                 return 0;
1571         }
1572         return 1;
1573 }
1574
1575 /**
1576  * lpfc_more_plogi - Check and issue remaining plogis for a vport
1577  * @vport: pointer to a host virtual N_Port data structure.
1578  *
1579  * This routine checks whether there are more remaining Port Logins
1580  * (PLOGI) to be issued for the @vport. If so, it will invoke the routine
1581  * lpfc_els_disc_plogi() to go through the Node Port Recovery (NPR) nodes
1582  * to issue ELS PLOGIs up to the configured discover threads with the
1583  * @vport (@vport->cfg_discovery_threads). The function also decrement
1584  * the @vport's num_disc_node by 1 if it is not already 0.
1585  **/
1586 void
1587 lpfc_more_plogi(struct lpfc_vport *vport)
1588 {
1589         if (vport->num_disc_nodes)
1590                 vport->num_disc_nodes--;
1591
1592         /* Continue discovery with <num_disc_nodes> PLOGIs to go */
1593         lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
1594                          "0232 Continue discovery with %d PLOGIs to go "
1595                          "Data: x%x x%x x%x\n",
1596                          vport->num_disc_nodes, vport->fc_plogi_cnt,
1597                          vport->fc_flag, vport->port_state);
1598         /* Check to see if there are more PLOGIs to be sent */
1599         if (vport->fc_flag & FC_NLP_MORE)
1600                 /* go thru NPR nodes and issue any remaining ELS PLOGIs */
1601                 lpfc_els_disc_plogi(vport);
1602
1603         return;
1604 }
1605
1606 /**
1607  * lpfc_plogi_confirm_nport - Confirm plogi wwpn matches stored ndlp
1608  * @phba: pointer to lpfc hba data structure.
1609  * @prsp: pointer to response IOCB payload.
1610  * @ndlp: pointer to a node-list data structure.
1611  *
1612  * This routine checks and indicates whether the WWPN of an N_Port, retrieved
1613  * from a PLOGI, matches the WWPN that is stored in the @ndlp for that N_POrt.
1614  * The following cases are considered N_Port confirmed:
1615  * 1) The N_Port is a Fabric ndlp; 2) The @ndlp is on vport list and matches
1616  * the WWPN of the N_Port logged into; 3) The @ndlp is not on vport list but
1617  * it does not have WWPN assigned either. If the WWPN is confirmed, the
1618  * pointer to the @ndlp will be returned. If the WWPN is not confirmed:
1619  * 1) if there is a node on vport list other than the @ndlp with the same
1620  * WWPN of the N_Port PLOGI logged into, the lpfc_unreg_rpi() will be invoked
1621  * on that node to release the RPI associated with the node; 2) if there is
1622  * no node found on vport list with the same WWPN of the N_Port PLOGI logged
1623  * into, a new node shall be allocated (or activated). In either case, the
1624  * parameters of the @ndlp shall be copied to the new_ndlp, the @ndlp shall
1625  * be released and the new_ndlp shall be put on to the vport node list and
1626  * its pointer returned as the confirmed node.
1627  *
1628  * Note that before the @ndlp got "released", the keepDID from not-matching
1629  * or inactive "new_ndlp" on the vport node list is assigned to the nlp_DID
1630  * of the @ndlp. This is because the release of @ndlp is actually to put it
1631  * into an inactive state on the vport node list and the vport node list
1632  * management algorithm does not allow two node with a same DID.
1633  *
1634  * Return code
1635  *   pointer to the PLOGI N_Port @ndlp
1636  **/
1637 static struct lpfc_nodelist *
1638 lpfc_plogi_confirm_nport(struct lpfc_hba *phba, uint32_t *prsp,
1639                          struct lpfc_nodelist *ndlp)
1640 {
1641         struct lpfc_vport *vport = ndlp->vport;
1642         struct lpfc_nodelist *new_ndlp;
1643         struct serv_parm *sp;
1644         uint8_t  name[sizeof(struct lpfc_name)];
1645         uint32_t keepDID = 0, keep_nlp_flag = 0;
1646         uint32_t keep_new_nlp_flag = 0;
1647         uint16_t keep_nlp_state;
1648         u32 keep_nlp_fc4_type = 0;
1649         struct lpfc_nvme_rport *keep_nrport = NULL;
1650         unsigned long *active_rrqs_xri_bitmap = NULL;
1651
1652         /* Fabric nodes can have the same WWPN so we don't bother searching
1653          * by WWPN.  Just return the ndlp that was given to us.
1654          */
1655         if (ndlp->nlp_type & NLP_FABRIC)
1656                 return ndlp;
1657
1658         sp = (struct serv_parm *) ((uint8_t *) prsp + sizeof(uint32_t));
1659         memset(name, 0, sizeof(struct lpfc_name));
1660
1661         /* Now we find out if the NPort we are logging into, matches the WWPN
1662          * we have for that ndlp. If not, we have some work to do.
1663          */
1664         new_ndlp = lpfc_findnode_wwpn(vport, &sp->portName);
1665
1666         /* return immediately if the WWPN matches ndlp */
1667         if (!new_ndlp || (new_ndlp == ndlp))
1668                 return ndlp;
1669
1670         /*
1671          * Unregister from backend if not done yet. Could have been skipped
1672          * due to ADISC
1673          */
1674         lpfc_nlp_unreg_node(vport, new_ndlp);
1675
1676         if (phba->sli_rev == LPFC_SLI_REV4) {
1677                 active_rrqs_xri_bitmap = mempool_alloc(phba->active_rrq_pool,
1678                                                        GFP_KERNEL);
1679                 if (active_rrqs_xri_bitmap)
1680                         memset(active_rrqs_xri_bitmap, 0,
1681                                phba->cfg_rrq_xri_bitmap_sz);
1682         }
1683
1684         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS | LOG_NODE,
1685                          "3178 PLOGI confirm: ndlp x%x x%x x%x: "
1686                          "new_ndlp x%x x%x x%x\n",
1687                          ndlp->nlp_DID, ndlp->nlp_flag,  ndlp->nlp_fc4_type,
1688                          (new_ndlp ? new_ndlp->nlp_DID : 0),
1689                          (new_ndlp ? new_ndlp->nlp_flag : 0),
1690                          (new_ndlp ? new_ndlp->nlp_fc4_type : 0));
1691
1692         keepDID = new_ndlp->nlp_DID;
1693
1694         if (phba->sli_rev == LPFC_SLI_REV4 && active_rrqs_xri_bitmap)
1695                 memcpy(active_rrqs_xri_bitmap, new_ndlp->active_rrqs_xri_bitmap,
1696                        phba->cfg_rrq_xri_bitmap_sz);
1697
1698         /* At this point in this routine, we know new_ndlp will be
1699          * returned. however, any previous GID_FTs that were done
1700          * would have updated nlp_fc4_type in ndlp, so we must ensure
1701          * new_ndlp has the right value.
1702          */
1703         if (vport->fc_flag & FC_FABRIC) {
1704                 keep_nlp_fc4_type = new_ndlp->nlp_fc4_type;
1705                 new_ndlp->nlp_fc4_type = ndlp->nlp_fc4_type;
1706         }
1707
1708         lpfc_unreg_rpi(vport, new_ndlp);
1709         new_ndlp->nlp_DID = ndlp->nlp_DID;
1710         new_ndlp->nlp_prev_state = ndlp->nlp_prev_state;
1711         if (phba->sli_rev == LPFC_SLI_REV4)
1712                 memcpy(new_ndlp->active_rrqs_xri_bitmap,
1713                        ndlp->active_rrqs_xri_bitmap,
1714                        phba->cfg_rrq_xri_bitmap_sz);
1715
1716         /* Lock both ndlps */
1717         spin_lock_irq(&ndlp->lock);
1718         spin_lock_irq(&new_ndlp->lock);
1719         keep_new_nlp_flag = new_ndlp->nlp_flag;
1720         keep_nlp_flag = ndlp->nlp_flag;
1721         new_ndlp->nlp_flag = ndlp->nlp_flag;
1722
1723         /* if new_ndlp had NLP_UNREG_INP set, keep it */
1724         if (keep_new_nlp_flag & NLP_UNREG_INP)
1725                 new_ndlp->nlp_flag |= NLP_UNREG_INP;
1726         else
1727                 new_ndlp->nlp_flag &= ~NLP_UNREG_INP;
1728
1729         /* if new_ndlp had NLP_RPI_REGISTERED set, keep it */
1730         if (keep_new_nlp_flag & NLP_RPI_REGISTERED)
1731                 new_ndlp->nlp_flag |= NLP_RPI_REGISTERED;
1732         else
1733                 new_ndlp->nlp_flag &= ~NLP_RPI_REGISTERED;
1734
1735         /*
1736          * Retain the DROPPED flag. This will take care of the init
1737          * refcount when affecting the state change
1738          */
1739         if (keep_new_nlp_flag & NLP_DROPPED)
1740                 new_ndlp->nlp_flag |= NLP_DROPPED;
1741         else
1742                 new_ndlp->nlp_flag &= ~NLP_DROPPED;
1743
1744         ndlp->nlp_flag = keep_new_nlp_flag;
1745
1746         /* if ndlp had NLP_UNREG_INP set, keep it */
1747         if (keep_nlp_flag & NLP_UNREG_INP)
1748                 ndlp->nlp_flag |= NLP_UNREG_INP;
1749         else
1750                 ndlp->nlp_flag &= ~NLP_UNREG_INP;
1751
1752         /* if ndlp had NLP_RPI_REGISTERED set, keep it */
1753         if (keep_nlp_flag & NLP_RPI_REGISTERED)
1754                 ndlp->nlp_flag |= NLP_RPI_REGISTERED;
1755         else
1756                 ndlp->nlp_flag &= ~NLP_RPI_REGISTERED;
1757
1758         /*
1759          * Retain the DROPPED flag. This will take care of the init
1760          * refcount when affecting the state change
1761          */
1762         if (keep_nlp_flag & NLP_DROPPED)
1763                 ndlp->nlp_flag |= NLP_DROPPED;
1764         else
1765                 ndlp->nlp_flag &= ~NLP_DROPPED;
1766
1767         spin_unlock_irq(&new_ndlp->lock);
1768         spin_unlock_irq(&ndlp->lock);
1769
1770         /* Set nlp_states accordingly */
1771         keep_nlp_state = new_ndlp->nlp_state;
1772         lpfc_nlp_set_state(vport, new_ndlp, ndlp->nlp_state);
1773
1774         /* interchange the nvme remoteport structs */
1775         keep_nrport = new_ndlp->nrport;
1776         new_ndlp->nrport = ndlp->nrport;
1777
1778         /* Move this back to NPR state */
1779         if (memcmp(&ndlp->nlp_portname, name, sizeof(struct lpfc_name)) == 0) {
1780                 /* The new_ndlp is replacing ndlp totally, so we need
1781                  * to put ndlp on UNUSED list and try to free it.
1782                  */
1783                 lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
1784                          "3179 PLOGI confirm NEW: %x %x\n",
1785                          new_ndlp->nlp_DID, keepDID);
1786
1787                 /* Two ndlps cannot have the same did on the nodelist.
1788                  * Note: for this case, ndlp has a NULL WWPN so setting
1789                  * the nlp_fc4_type isn't required.
1790                  */
1791                 ndlp->nlp_DID = keepDID;
1792                 lpfc_nlp_set_state(vport, ndlp, keep_nlp_state);
1793                 if (phba->sli_rev == LPFC_SLI_REV4 &&
1794                     active_rrqs_xri_bitmap)
1795                         memcpy(ndlp->active_rrqs_xri_bitmap,
1796                                active_rrqs_xri_bitmap,
1797                                phba->cfg_rrq_xri_bitmap_sz);
1798
1799         } else {
1800                 lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
1801                          "3180 PLOGI confirm SWAP: %x %x\n",
1802                          new_ndlp->nlp_DID, keepDID);
1803
1804                 lpfc_unreg_rpi(vport, ndlp);
1805
1806                 /* Two ndlps cannot have the same did and the fc4
1807                  * type must be transferred because the ndlp is in
1808                  * flight.
1809                  */
1810                 ndlp->nlp_DID = keepDID;
1811                 ndlp->nlp_fc4_type = keep_nlp_fc4_type;
1812
1813                 if (phba->sli_rev == LPFC_SLI_REV4 &&
1814                     active_rrqs_xri_bitmap)
1815                         memcpy(ndlp->active_rrqs_xri_bitmap,
1816                                active_rrqs_xri_bitmap,
1817                                phba->cfg_rrq_xri_bitmap_sz);
1818
1819                 /* Since we are switching over to the new_ndlp,
1820                  * reset the old ndlp state
1821                  */
1822                 if ((ndlp->nlp_state == NLP_STE_UNMAPPED_NODE) ||
1823                     (ndlp->nlp_state == NLP_STE_MAPPED_NODE))
1824                         keep_nlp_state = NLP_STE_NPR_NODE;
1825                 lpfc_nlp_set_state(vport, ndlp, keep_nlp_state);
1826                 ndlp->nrport = keep_nrport;
1827         }
1828
1829         /*
1830          * If ndlp is not associated with any rport we can drop it here else
1831          * let dev_loss_tmo_callbk trigger DEVICE_RM event
1832          */
1833         if (!ndlp->rport && (ndlp->nlp_state == NLP_STE_NPR_NODE))
1834                 lpfc_disc_state_machine(vport, ndlp, NULL, NLP_EVT_DEVICE_RM);
1835
1836         if (phba->sli_rev == LPFC_SLI_REV4 &&
1837             active_rrqs_xri_bitmap)
1838                 mempool_free(active_rrqs_xri_bitmap,
1839                              phba->active_rrq_pool);
1840
1841         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS | LOG_NODE,
1842                          "3173 PLOGI confirm exit: new_ndlp x%x x%x x%x\n",
1843                          new_ndlp->nlp_DID, new_ndlp->nlp_flag,
1844                          new_ndlp->nlp_fc4_type);
1845
1846         return new_ndlp;
1847 }
1848
1849 /**
1850  * lpfc_end_rscn - Check and handle more rscn for a vport
1851  * @vport: pointer to a host virtual N_Port data structure.
1852  *
1853  * This routine checks whether more Registration State Change
1854  * Notifications (RSCNs) came in while the discovery state machine was in
1855  * the FC_RSCN_MODE. If so, the lpfc_els_handle_rscn() routine will be
1856  * invoked to handle the additional RSCNs for the @vport. Otherwise, the
1857  * FC_RSCN_MODE bit will be cleared with the @vport to mark as the end of
1858  * handling the RSCNs.
1859  **/
1860 void
1861 lpfc_end_rscn(struct lpfc_vport *vport)
1862 {
1863         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1864
1865         if (vport->fc_flag & FC_RSCN_MODE) {
1866                 /*
1867                  * Check to see if more RSCNs came in while we were
1868                  * processing this one.
1869                  */
1870                 if (vport->fc_rscn_id_cnt ||
1871                     (vport->fc_flag & FC_RSCN_DISCOVERY) != 0)
1872                         lpfc_els_handle_rscn(vport);
1873                 else {
1874                         spin_lock_irq(shost->host_lock);
1875                         vport->fc_flag &= ~FC_RSCN_MODE;
1876                         spin_unlock_irq(shost->host_lock);
1877                 }
1878         }
1879 }
1880
1881 /**
1882  * lpfc_cmpl_els_rrq - Completion handled for els RRQs.
1883  * @phba: pointer to lpfc hba data structure.
1884  * @cmdiocb: pointer to lpfc command iocb data structure.
1885  * @rspiocb: pointer to lpfc response iocb data structure.
1886  *
1887  * This routine will call the clear rrq function to free the rrq and
1888  * clear the xri's bit in the ndlp's xri_bitmap. If the ndlp does not
1889  * exist then the clear_rrq is still called because the rrq needs to
1890  * be freed.
1891  **/
1892
1893 static void
1894 lpfc_cmpl_els_rrq(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
1895                     struct lpfc_iocbq *rspiocb)
1896 {
1897         struct lpfc_vport *vport = cmdiocb->vport;
1898         IOCB_t *irsp;
1899         struct lpfc_nodelist *ndlp = cmdiocb->context1;
1900         struct lpfc_node_rrq *rrq;
1901
1902         /* we pass cmdiocb to state machine which needs rspiocb as well */
1903         rrq = cmdiocb->context_un.rrq;
1904         cmdiocb->context_un.rsp_iocb = rspiocb;
1905
1906         irsp = &rspiocb->iocb;
1907         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
1908                 "RRQ cmpl:      status:x%x/x%x did:x%x",
1909                 irsp->ulpStatus, irsp->un.ulpWord[4],
1910                 irsp->un.elsreq64.remoteID);
1911
1912         /* rrq completes to NPort <nlp_DID> */
1913         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
1914                          "2880 RRQ completes to DID x%x "
1915                          "Data: x%x x%x x%x x%x x%x\n",
1916                          irsp->un.elsreq64.remoteID,
1917                          irsp->ulpStatus, irsp->un.ulpWord[4],
1918                          irsp->ulpTimeout, rrq->xritag, rrq->rxid);
1919
1920         if (irsp->ulpStatus) {
1921                 /* Check for retry */
1922                 /* RRQ failed Don't print the vport to vport rjts */
1923                 if (irsp->ulpStatus != IOSTAT_LS_RJT ||
1924                         (((irsp->un.ulpWord[4]) >> 16 != LSRJT_INVALID_CMD) &&
1925                         ((irsp->un.ulpWord[4]) >> 16 != LSRJT_UNABLE_TPC)) ||
1926                         (phba)->pport->cfg_log_verbose & LOG_ELS)
1927                         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
1928                                          "2881 RRQ failure DID:%06X Status:"
1929                                          "x%x/x%x\n",
1930                                          ndlp->nlp_DID, irsp->ulpStatus,
1931                                          irsp->un.ulpWord[4]);
1932         }
1933
1934         lpfc_clr_rrq_active(phba, rrq->xritag, rrq);
1935         lpfc_els_free_iocb(phba, cmdiocb);
1936         lpfc_nlp_put(ndlp);
1937         return;
1938 }
1939 /**
1940  * lpfc_cmpl_els_plogi - Completion callback function for plogi
1941  * @phba: pointer to lpfc hba data structure.
1942  * @cmdiocb: pointer to lpfc command iocb data structure.
1943  * @rspiocb: pointer to lpfc response iocb data structure.
1944  *
1945  * This routine is the completion callback function for issuing the Port
1946  * Login (PLOGI) command. For PLOGI completion, there must be an active
1947  * ndlp on the vport node list that matches the remote node ID from the
1948  * PLOGI response IOCB. If such ndlp does not exist, the PLOGI is simply
1949  * ignored and command IOCB released. The PLOGI response IOCB status is
1950  * checked for error conditions. If there is error status reported, PLOGI
1951  * retry shall be attempted by invoking the lpfc_els_retry() routine.
1952  * Otherwise, the lpfc_plogi_confirm_nport() routine shall be invoked on
1953  * the ndlp and the NLP_EVT_CMPL_PLOGI state to the Discover State Machine
1954  * (DSM) is set for this PLOGI completion. Finally, it checks whether
1955  * there are additional N_Port nodes with the vport that need to perform
1956  * PLOGI. If so, the lpfc_more_plogi() routine is invoked to issue addition
1957  * PLOGIs.
1958  **/
1959 static void
1960 lpfc_cmpl_els_plogi(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
1961                     struct lpfc_iocbq *rspiocb)
1962 {
1963         struct lpfc_vport *vport = cmdiocb->vport;
1964         struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
1965         IOCB_t *irsp;
1966         struct lpfc_nodelist *ndlp, *free_ndlp;
1967         struct lpfc_dmabuf *prsp;
1968         int disc;
1969         struct serv_parm *sp = NULL;
1970
1971         /* we pass cmdiocb to state machine which needs rspiocb as well */
1972         cmdiocb->context_un.rsp_iocb = rspiocb;
1973
1974         irsp = &rspiocb->iocb;
1975         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
1976                 "PLOGI cmpl:      status:x%x/x%x did:x%x",
1977                 irsp->ulpStatus, irsp->un.ulpWord[4],
1978                 irsp->un.elsreq64.remoteID);
1979
1980         ndlp = lpfc_findnode_did(vport, irsp->un.elsreq64.remoteID);
1981         if (!ndlp) {
1982                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
1983                                  "0136 PLOGI completes to NPort x%x "
1984                                  "with no ndlp. Data: x%x x%x x%x\n",
1985                                  irsp->un.elsreq64.remoteID,
1986                                  irsp->ulpStatus, irsp->un.ulpWord[4],
1987                                  irsp->ulpIoTag);
1988                 goto out_freeiocb;
1989         }
1990
1991         /* Since ndlp can be freed in the disc state machine, note if this node
1992          * is being used during discovery.
1993          */
1994         spin_lock_irq(&ndlp->lock);
1995         disc = (ndlp->nlp_flag & NLP_NPR_2B_DISC);
1996         ndlp->nlp_flag &= ~NLP_NPR_2B_DISC;
1997         spin_unlock_irq(&ndlp->lock);
1998
1999         /* PLOGI completes to NPort <nlp_DID> */
2000         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
2001                          "0102 PLOGI completes to NPort x%06x "
2002                          "Data: x%x x%x x%x x%x x%x\n",
2003                          ndlp->nlp_DID, ndlp->nlp_fc4_type,
2004                          irsp->ulpStatus, irsp->un.ulpWord[4],
2005                          disc, vport->num_disc_nodes);
2006
2007         /* Check to see if link went down during discovery */
2008         if (lpfc_els_chk_latt(vport)) {
2009                 spin_lock_irq(&ndlp->lock);
2010                 ndlp->nlp_flag |= NLP_NPR_2B_DISC;
2011                 spin_unlock_irq(&ndlp->lock);
2012                 goto out;
2013         }
2014
2015         if (irsp->ulpStatus) {
2016                 /* Check for retry */
2017                 if (lpfc_els_retry(phba, cmdiocb, rspiocb)) {
2018                         /* ELS command is being retried */
2019                         if (disc) {
2020                                 spin_lock_irq(&ndlp->lock);
2021                                 ndlp->nlp_flag |= NLP_NPR_2B_DISC;
2022                                 spin_unlock_irq(&ndlp->lock);
2023                         }
2024                         goto out;
2025                 }
2026                 /* PLOGI failed Don't print the vport to vport rjts */
2027                 if (irsp->ulpStatus != IOSTAT_LS_RJT ||
2028                         (((irsp->un.ulpWord[4]) >> 16 != LSRJT_INVALID_CMD) &&
2029                         ((irsp->un.ulpWord[4]) >> 16 != LSRJT_UNABLE_TPC)) ||
2030                         (phba)->pport->cfg_log_verbose & LOG_ELS)
2031                         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
2032                                  "2753 PLOGI failure DID:%06X Status:x%x/x%x\n",
2033                                  ndlp->nlp_DID, irsp->ulpStatus,
2034                                  irsp->un.ulpWord[4]);
2035
2036                 /* Do not call DSM for lpfc_els_abort'ed ELS cmds */
2037                 if (!lpfc_error_lost_link(irsp))
2038                         lpfc_disc_state_machine(vport, ndlp, cmdiocb,
2039                                                 NLP_EVT_CMPL_PLOGI);
2040
2041                 /* If a PLOGI collision occurred, the node needs to continue
2042                  * with the reglogin process.
2043                  */
2044                 spin_lock_irq(&ndlp->lock);
2045                 if ((ndlp->nlp_flag & (NLP_ACC_REGLOGIN | NLP_RCV_PLOGI)) &&
2046                     ndlp->nlp_state == NLP_STE_REG_LOGIN_ISSUE) {
2047                         spin_unlock_irq(&ndlp->lock);
2048                         goto out;
2049                 }
2050                 spin_unlock_irq(&ndlp->lock);
2051
2052                 /* No PLOGI collision and the node is not registered with the
2053                  * scsi or nvme transport. It is no longer an active node. Just
2054                  * start the device remove process.
2055                  */
2056                 if (!(ndlp->fc4_xpt_flags & (SCSI_XPT_REGD | NVME_XPT_REGD))) {
2057                         spin_lock_irq(&ndlp->lock);
2058                         ndlp->nlp_flag &= ~NLP_NPR_2B_DISC;
2059                         spin_unlock_irq(&ndlp->lock);
2060                         lpfc_disc_state_machine(vport, ndlp, cmdiocb,
2061                                                 NLP_EVT_DEVICE_RM);
2062                 }
2063         } else {
2064                 /* Good status, call state machine */
2065                 prsp = list_entry(((struct lpfc_dmabuf *)
2066                                    cmdiocb->context2)->list.next,
2067                                   struct lpfc_dmabuf, list);
2068                 ndlp = lpfc_plogi_confirm_nport(phba, prsp->virt, ndlp);
2069
2070                 sp = (struct serv_parm *)((u8 *)prsp->virt +
2071                                           sizeof(u32));
2072
2073                 ndlp->vmid_support = 0;
2074                 if ((phba->cfg_vmid_app_header && sp->cmn.app_hdr_support) ||
2075                     (phba->cfg_vmid_priority_tagging &&
2076                      sp->cmn.priority_tagging)) {
2077                         lpfc_printf_log(phba, KERN_DEBUG, LOG_ELS,
2078                                         "4018 app_hdr_support %d tagging %d DID x%x\n",
2079                                         sp->cmn.app_hdr_support,
2080                                         sp->cmn.priority_tagging,
2081                                         ndlp->nlp_DID);
2082                         /* if the dest port supports VMID, mark it in ndlp */
2083                         ndlp->vmid_support = 1;
2084                 }
2085
2086                 lpfc_disc_state_machine(vport, ndlp, cmdiocb,
2087                                         NLP_EVT_CMPL_PLOGI);
2088         }
2089
2090         if (disc && vport->num_disc_nodes) {
2091                 /* Check to see if there are more PLOGIs to be sent */
2092                 lpfc_more_plogi(vport);
2093
2094                 if (vport->num_disc_nodes == 0) {
2095                         spin_lock_irq(shost->host_lock);
2096                         vport->fc_flag &= ~FC_NDISC_ACTIVE;
2097                         spin_unlock_irq(shost->host_lock);
2098
2099                         lpfc_can_disctmo(vport);
2100                         lpfc_end_rscn(vport);
2101                 }
2102         }
2103
2104 out:
2105         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_NODE,
2106                               "PLOGI Cmpl PUT:     did:x%x refcnt %d",
2107                               ndlp->nlp_DID, kref_read(&ndlp->kref), 0);
2108
2109 out_freeiocb:
2110         /* Release the reference on the original I/O request. */
2111         free_ndlp = (struct lpfc_nodelist *)cmdiocb->context1;
2112
2113         lpfc_els_free_iocb(phba, cmdiocb);
2114         lpfc_nlp_put(free_ndlp);
2115         return;
2116 }
2117
2118 /**
2119  * lpfc_issue_els_plogi - Issue an plogi iocb command for a vport
2120  * @vport: pointer to a host virtual N_Port data structure.
2121  * @did: destination port identifier.
2122  * @retry: number of retries to the command IOCB.
2123  *
2124  * This routine issues a Port Login (PLOGI) command to a remote N_Port
2125  * (with the @did) for a @vport. Before issuing a PLOGI to a remote N_Port,
2126  * the ndlp with the remote N_Port DID must exist on the @vport's ndlp list.
2127  * This routine constructs the proper fields of the PLOGI IOCB and invokes
2128  * the lpfc_sli_issue_iocb() routine to send out PLOGI ELS command.
2129  *
2130  * Note that the ndlp reference count will be incremented by 1 for holding
2131  * the ndlp and the reference to ndlp will be stored into the context1 field
2132  * of the IOCB for the completion callback function to the PLOGI ELS command.
2133  *
2134  * Return code
2135  *   0 - Successfully issued a plogi for @vport
2136  *   1 - failed to issue a plogi for @vport
2137  **/
2138 int
2139 lpfc_issue_els_plogi(struct lpfc_vport *vport, uint32_t did, uint8_t retry)
2140 {
2141         struct lpfc_hba  *phba = vport->phba;
2142         struct serv_parm *sp;
2143         struct lpfc_nodelist *ndlp;
2144         struct lpfc_iocbq *elsiocb;
2145         uint8_t *pcmd;
2146         uint16_t cmdsize;
2147         int ret;
2148
2149         ndlp = lpfc_findnode_did(vport, did);
2150         if (!ndlp)
2151                 return 1;
2152
2153         /* Defer the processing of the issue PLOGI until after the
2154          * outstanding UNREG_RPI mbox command completes, unless we
2155          * are going offline. This logic does not apply for Fabric DIDs
2156          */
2157         if ((ndlp->nlp_flag & NLP_UNREG_INP) &&
2158             ((ndlp->nlp_DID & Fabric_DID_MASK) != Fabric_DID_MASK) &&
2159             !(vport->fc_flag & FC_OFFLINE_MODE)) {
2160                 lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
2161                                  "4110 Issue PLOGI x%x deferred "
2162                                  "on NPort x%x rpi x%x Data: x%px\n",
2163                                  ndlp->nlp_defer_did, ndlp->nlp_DID,
2164                                  ndlp->nlp_rpi, ndlp);
2165
2166                 /* We can only defer 1st PLOGI */
2167                 if (ndlp->nlp_defer_did == NLP_EVT_NOTHING_PENDING)
2168                         ndlp->nlp_defer_did = did;
2169                 return 0;
2170         }
2171
2172         cmdsize = (sizeof(uint32_t) + sizeof(struct serv_parm));
2173         elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, retry, ndlp, did,
2174                                      ELS_CMD_PLOGI);
2175         if (!elsiocb)
2176                 return 1;
2177
2178         spin_lock_irq(&ndlp->lock);
2179         ndlp->nlp_flag &= ~NLP_FCP_PRLI_RJT;
2180         spin_unlock_irq(&ndlp->lock);
2181
2182         pcmd = (uint8_t *) (((struct lpfc_dmabuf *) elsiocb->context2)->virt);
2183
2184         /* For PLOGI request, remainder of payload is service parameters */
2185         *((uint32_t *) (pcmd)) = ELS_CMD_PLOGI;
2186         pcmd += sizeof(uint32_t);
2187         memcpy(pcmd, &vport->fc_sparam, sizeof(struct serv_parm));
2188         sp = (struct serv_parm *) pcmd;
2189
2190         /*
2191          * If we are a N-port connected to a Fabric, fix-up paramm's so logins
2192          * to device on remote loops work.
2193          */
2194         if ((vport->fc_flag & FC_FABRIC) && !(vport->fc_flag & FC_PUBLIC_LOOP))
2195                 sp->cmn.altBbCredit = 1;
2196
2197         if (sp->cmn.fcphLow < FC_PH_4_3)
2198                 sp->cmn.fcphLow = FC_PH_4_3;
2199
2200         if (sp->cmn.fcphHigh < FC_PH3)
2201                 sp->cmn.fcphHigh = FC_PH3;
2202
2203         sp->cmn.valid_vendor_ver_level = 0;
2204         memset(sp->un.vendorVersion, 0, sizeof(sp->un.vendorVersion));
2205         sp->cmn.bbRcvSizeMsb &= 0xF;
2206
2207         /* Check if the destination port supports VMID */
2208         ndlp->vmid_support = 0;
2209         if (vport->vmid_priority_tagging)
2210                 sp->cmn.priority_tagging = 1;
2211         else if (phba->cfg_vmid_app_header &&
2212                  bf_get(lpfc_ftr_ashdr, &phba->sli4_hba.sli4_flags))
2213                 sp->cmn.app_hdr_support = 1;
2214
2215         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
2216                 "Issue PLOGI:     did:x%x",
2217                 did, 0, 0);
2218
2219         /* If our firmware supports this feature, convey that
2220          * information to the target using the vendor specific field.
2221          */
2222         if (phba->sli.sli_flag & LPFC_SLI_SUPPRESS_RSP) {
2223                 sp->cmn.valid_vendor_ver_level = 1;
2224                 sp->un.vv.vid = cpu_to_be32(LPFC_VV_EMLX_ID);
2225                 sp->un.vv.flags = cpu_to_be32(LPFC_VV_SUPPRESS_RSP);
2226         }
2227
2228         phba->fc_stat.elsXmitPLOGI++;
2229         elsiocb->iocb_cmpl = lpfc_cmpl_els_plogi;
2230
2231         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
2232                               "Issue PLOGI:     did:x%x refcnt %d",
2233                               did, kref_read(&ndlp->kref), 0);
2234         elsiocb->context1 = lpfc_nlp_get(ndlp);
2235         if (!elsiocb->context1) {
2236                 lpfc_els_free_iocb(phba, elsiocb);
2237                 return 1;
2238         }
2239
2240         ret = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
2241         if (ret) {
2242                 lpfc_els_free_iocb(phba, elsiocb);
2243                 lpfc_nlp_put(ndlp);
2244                 return 1;
2245         }
2246
2247         return 0;
2248 }
2249
2250 /**
2251  * lpfc_cmpl_els_prli - Completion callback function for prli
2252  * @phba: pointer to lpfc hba data structure.
2253  * @cmdiocb: pointer to lpfc command iocb data structure.
2254  * @rspiocb: pointer to lpfc response iocb data structure.
2255  *
2256  * This routine is the completion callback function for a Process Login
2257  * (PRLI) ELS command. The PRLI response IOCB status is checked for error
2258  * status. If there is error status reported, PRLI retry shall be attempted
2259  * by invoking the lpfc_els_retry() routine. Otherwise, the state
2260  * NLP_EVT_CMPL_PRLI is sent to the Discover State Machine (DSM) for this
2261  * ndlp to mark the PRLI completion.
2262  **/
2263 static void
2264 lpfc_cmpl_els_prli(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
2265                    struct lpfc_iocbq *rspiocb)
2266 {
2267         struct lpfc_vport *vport = cmdiocb->vport;
2268         IOCB_t *irsp;
2269         struct lpfc_nodelist *ndlp;
2270         char *mode;
2271         u32 loglevel;
2272
2273         /* we pass cmdiocb to state machine which needs rspiocb as well */
2274         cmdiocb->context_un.rsp_iocb = rspiocb;
2275
2276         irsp = &(rspiocb->iocb);
2277         ndlp = (struct lpfc_nodelist *) cmdiocb->context1;
2278         spin_lock_irq(&ndlp->lock);
2279         ndlp->nlp_flag &= ~NLP_PRLI_SND;
2280
2281         /* Driver supports multiple FC4 types.  Counters matter. */
2282         vport->fc_prli_sent--;
2283         ndlp->fc4_prli_sent--;
2284         spin_unlock_irq(&ndlp->lock);
2285
2286         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
2287                 "PRLI cmpl:       status:x%x/x%x did:x%x",
2288                 irsp->ulpStatus, irsp->un.ulpWord[4],
2289                 ndlp->nlp_DID);
2290
2291         /* PRLI completes to NPort <nlp_DID> */
2292         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
2293                          "0103 PRLI completes to NPort x%06x "
2294                          "Data: x%x x%x x%x x%x\n",
2295                          ndlp->nlp_DID, irsp->ulpStatus, irsp->un.ulpWord[4],
2296                          vport->num_disc_nodes, ndlp->fc4_prli_sent);
2297
2298         /* Check to see if link went down during discovery */
2299         if (lpfc_els_chk_latt(vport))
2300                 goto out;
2301
2302         if (irsp->ulpStatus) {
2303                 /* Check for retry */
2304                 if (lpfc_els_retry(phba, cmdiocb, rspiocb)) {
2305                         /* ELS command is being retried */
2306                         goto out;
2307                 }
2308
2309                 /* If we don't send GFT_ID to Fabric, a PRLI error
2310                  * could be expected.
2311                  */
2312                 if ((vport->fc_flag & FC_FABRIC) ||
2313                     (vport->cfg_enable_fc4_type != LPFC_ENABLE_BOTH)) {
2314                         mode = KERN_ERR;
2315                         loglevel =  LOG_TRACE_EVENT;
2316                 } else {
2317                         mode = KERN_INFO;
2318                         loglevel =  LOG_ELS;
2319                 }
2320
2321                 /* PRLI failed */
2322                 lpfc_printf_vlog(vport, mode, loglevel,
2323                                  "2754 PRLI failure DID:%06X Status:x%x/x%x, "
2324                                  "data: x%x\n",
2325                                  ndlp->nlp_DID, irsp->ulpStatus,
2326                                  irsp->un.ulpWord[4], ndlp->fc4_prli_sent);
2327
2328                 /* Do not call DSM for lpfc_els_abort'ed ELS cmds */
2329                 if (!lpfc_error_lost_link(irsp))
2330                         lpfc_disc_state_machine(vport, ndlp, cmdiocb,
2331                                                 NLP_EVT_CMPL_PRLI);
2332
2333                 /*
2334                  * For P2P topology, retain the node so that PLOGI can be
2335                  * attempted on it again.
2336                  */
2337                 if (vport->fc_flag & FC_PT2PT)
2338                         goto out;
2339
2340                 /* As long as this node is not registered with the SCSI
2341                  * or NVMe transport and no other PRLIs are outstanding,
2342                  * it is no longer an active node.  Otherwise devloss
2343                  * handles the final cleanup.
2344                  */
2345                 if (!(ndlp->fc4_xpt_flags & (SCSI_XPT_REGD | NVME_XPT_REGD)) &&
2346                     !ndlp->fc4_prli_sent) {
2347                         spin_lock_irq(&ndlp->lock);
2348                         ndlp->nlp_flag &= ~NLP_NPR_2B_DISC;
2349                         spin_unlock_irq(&ndlp->lock);
2350                         lpfc_disc_state_machine(vport, ndlp, cmdiocb,
2351                                                 NLP_EVT_DEVICE_RM);
2352                 }
2353         } else {
2354                 /* Good status, call state machine.  However, if another
2355                  * PRLI is outstanding, don't call the state machine
2356                  * because final disposition to Mapped or Unmapped is
2357                  * completed there.
2358                  */
2359                 lpfc_disc_state_machine(vport, ndlp, cmdiocb,
2360                                         NLP_EVT_CMPL_PRLI);
2361         }
2362
2363 out:
2364         lpfc_els_free_iocb(phba, cmdiocb);
2365         lpfc_nlp_put(ndlp);
2366         return;
2367 }
2368
2369 /**
2370  * lpfc_issue_els_prli - Issue a prli iocb command for a vport
2371  * @vport: pointer to a host virtual N_Port data structure.
2372  * @ndlp: pointer to a node-list data structure.
2373  * @retry: number of retries to the command IOCB.
2374  *
2375  * This routine issues a Process Login (PRLI) ELS command for the
2376  * @vport. The PRLI service parameters are set up in the payload of the
2377  * PRLI Request command and the pointer to lpfc_cmpl_els_prli() routine
2378  * is put to the IOCB completion callback func field before invoking the
2379  * routine lpfc_sli_issue_iocb() to send out PRLI command.
2380  *
2381  * Note that the ndlp reference count will be incremented by 1 for holding the
2382  * ndlp and the reference to ndlp will be stored into the context1 field of
2383  * the IOCB for the completion callback function to the PRLI ELS command.
2384  *
2385  * Return code
2386  *   0 - successfully issued prli iocb command for @vport
2387  *   1 - failed to issue prli iocb command for @vport
2388  **/
2389 int
2390 lpfc_issue_els_prli(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
2391                     uint8_t retry)
2392 {
2393         int rc = 0;
2394         struct lpfc_hba *phba = vport->phba;
2395         PRLI *npr;
2396         struct lpfc_nvme_prli *npr_nvme;
2397         struct lpfc_iocbq *elsiocb;
2398         uint8_t *pcmd;
2399         uint16_t cmdsize;
2400         u32 local_nlp_type, elscmd;
2401
2402         /*
2403          * If we are in RSCN mode, the FC4 types supported from a
2404          * previous GFT_ID command may not be accurate. So, if we
2405          * are a NVME Initiator, always look for the possibility of
2406          * the remote NPort beng a NVME Target.
2407          */
2408         if (phba->sli_rev == LPFC_SLI_REV4 &&
2409             vport->fc_flag & FC_RSCN_MODE &&
2410             vport->nvmei_support)
2411                 ndlp->nlp_fc4_type |= NLP_FC4_NVME;
2412         local_nlp_type = ndlp->nlp_fc4_type;
2413
2414         /* This routine will issue 1 or 2 PRLIs, so zero all the ndlp
2415          * fields here before any of them can complete.
2416          */
2417         ndlp->nlp_type &= ~(NLP_FCP_TARGET | NLP_FCP_INITIATOR);
2418         ndlp->nlp_type &= ~(NLP_NVME_TARGET | NLP_NVME_INITIATOR);
2419         ndlp->nlp_fcp_info &= ~NLP_FCP_2_DEVICE;
2420         ndlp->nlp_flag &= ~(NLP_FIRSTBURST | NLP_NPR_2B_DISC);
2421         ndlp->nvme_fb_size = 0;
2422
2423  send_next_prli:
2424         if (local_nlp_type & NLP_FC4_FCP) {
2425                 /* Payload is 4 + 16 = 20 x14 bytes. */
2426                 cmdsize = (sizeof(uint32_t) + sizeof(PRLI));
2427                 elscmd = ELS_CMD_PRLI;
2428         } else if (local_nlp_type & NLP_FC4_NVME) {
2429                 /* Payload is 4 + 20 = 24 x18 bytes. */
2430                 cmdsize = (sizeof(uint32_t) + sizeof(struct lpfc_nvme_prli));
2431                 elscmd = ELS_CMD_NVMEPRLI;
2432         } else {
2433                 lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
2434                                  "3083 Unknown FC_TYPE x%x ndlp x%06x\n",
2435                                  ndlp->nlp_fc4_type, ndlp->nlp_DID);
2436                 return 1;
2437         }
2438
2439         /* SLI3 ports don't support NVME.  If this rport is a strict NVME
2440          * FC4 type, implicitly LOGO.
2441          */
2442         if (phba->sli_rev == LPFC_SLI_REV3 &&
2443             ndlp->nlp_fc4_type == NLP_FC4_NVME) {
2444                 lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
2445                                  "3088 Rport fc4 type 0x%x not supported by SLI3 adapter\n",
2446                                  ndlp->nlp_type);
2447                 lpfc_disc_state_machine(vport, ndlp, NULL, NLP_EVT_DEVICE_RM);
2448                 return 1;
2449         }
2450
2451         elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, retry, ndlp,
2452                                      ndlp->nlp_DID, elscmd);
2453         if (!elsiocb)
2454                 return 1;
2455
2456         pcmd = (uint8_t *) (((struct lpfc_dmabuf *) elsiocb->context2)->virt);
2457
2458         /* For PRLI request, remainder of payload is service parameters */
2459         memset(pcmd, 0, cmdsize);
2460
2461         if (local_nlp_type & NLP_FC4_FCP) {
2462                 /* Remainder of payload is FCP PRLI parameter page.
2463                  * Note: this data structure is defined as
2464                  * BE/LE in the structure definition so no
2465                  * byte swap call is made.
2466                  */
2467                 *((uint32_t *)(pcmd)) = ELS_CMD_PRLI;
2468                 pcmd += sizeof(uint32_t);
2469                 npr = (PRLI *)pcmd;
2470
2471                 /*
2472                  * If our firmware version is 3.20 or later,
2473                  * set the following bits for FC-TAPE support.
2474                  */
2475                 if (phba->vpd.rev.feaLevelHigh >= 0x02) {
2476                         npr->ConfmComplAllowed = 1;
2477                         npr->Retry = 1;
2478                         npr->TaskRetryIdReq = 1;
2479                 }
2480                 npr->estabImagePair = 1;
2481                 npr->readXferRdyDis = 1;
2482                 if (vport->cfg_first_burst_size)
2483                         npr->writeXferRdyDis = 1;
2484
2485                 /* For FCP support */
2486                 npr->prliType = PRLI_FCP_TYPE;
2487                 npr->initiatorFunc = 1;
2488                 elsiocb->iocb_flag |= LPFC_PRLI_FCP_REQ;
2489
2490                 /* Remove FCP type - processed. */
2491                 local_nlp_type &= ~NLP_FC4_FCP;
2492         } else if (local_nlp_type & NLP_FC4_NVME) {
2493                 /* Remainder of payload is NVME PRLI parameter page.
2494                  * This data structure is the newer definition that
2495                  * uses bf macros so a byte swap is required.
2496                  */
2497                 *((uint32_t *)(pcmd)) = ELS_CMD_NVMEPRLI;
2498                 pcmd += sizeof(uint32_t);
2499                 npr_nvme = (struct lpfc_nvme_prli *)pcmd;
2500                 bf_set(prli_type_code, npr_nvme, PRLI_NVME_TYPE);
2501                 bf_set(prli_estabImagePair, npr_nvme, 0);  /* Should be 0 */
2502                 if (phba->nsler) {
2503                         bf_set(prli_nsler, npr_nvme, 1);
2504                         bf_set(prli_conf, npr_nvme, 1);
2505                 }
2506
2507                 /* Only initiators request first burst. */
2508                 if ((phba->cfg_nvme_enable_fb) &&
2509                     !phba->nvmet_support)
2510                         bf_set(prli_fba, npr_nvme, 1);
2511
2512                 if (phba->nvmet_support) {
2513                         bf_set(prli_tgt, npr_nvme, 1);
2514                         bf_set(prli_disc, npr_nvme, 1);
2515                 } else {
2516                         bf_set(prli_init, npr_nvme, 1);
2517                         bf_set(prli_conf, npr_nvme, 1);
2518                 }
2519
2520                 npr_nvme->word1 = cpu_to_be32(npr_nvme->word1);
2521                 npr_nvme->word4 = cpu_to_be32(npr_nvme->word4);
2522                 elsiocb->iocb_flag |= LPFC_PRLI_NVME_REQ;
2523
2524                 /* Remove NVME type - processed. */
2525                 local_nlp_type &= ~NLP_FC4_NVME;
2526         }
2527
2528         phba->fc_stat.elsXmitPRLI++;
2529         elsiocb->iocb_cmpl = lpfc_cmpl_els_prli;
2530         spin_lock_irq(&ndlp->lock);
2531         ndlp->nlp_flag |= NLP_PRLI_SND;
2532
2533         /* The vport counters are used for lpfc_scan_finished, but
2534          * the ndlp is used to track outstanding PRLIs for different
2535          * FC4 types.
2536          */
2537         vport->fc_prli_sent++;
2538         ndlp->fc4_prli_sent++;
2539         spin_unlock_irq(&ndlp->lock);
2540
2541         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
2542                               "Issue PRLI:  did:x%x refcnt %d",
2543                               ndlp->nlp_DID, kref_read(&ndlp->kref), 0);
2544         elsiocb->context1 = lpfc_nlp_get(ndlp);
2545         if (!elsiocb->context1) {
2546                 lpfc_els_free_iocb(phba, elsiocb);
2547                 goto err;
2548         }
2549
2550         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
2551         if (rc == IOCB_ERROR) {
2552                 lpfc_els_free_iocb(phba, elsiocb);
2553                 lpfc_nlp_put(ndlp);
2554                 goto err;
2555         }
2556
2557
2558         /* The driver supports 2 FC4 types.  Make sure
2559          * a PRLI is issued for all types before exiting.
2560          */
2561         if (phba->sli_rev == LPFC_SLI_REV4 &&
2562             local_nlp_type & (NLP_FC4_FCP | NLP_FC4_NVME))
2563                 goto send_next_prli;
2564         else
2565                 return 0;
2566
2567 err:
2568         spin_lock_irq(&ndlp->lock);
2569         ndlp->nlp_flag &= ~NLP_PRLI_SND;
2570         spin_unlock_irq(&ndlp->lock);
2571         return 1;
2572 }
2573
2574 /**
2575  * lpfc_rscn_disc - Perform rscn discovery for a vport
2576  * @vport: pointer to a host virtual N_Port data structure.
2577  *
2578  * This routine performs Registration State Change Notification (RSCN)
2579  * discovery for a @vport. If the @vport's node port recovery count is not
2580  * zero, it will invoke the lpfc_els_disc_plogi() to perform PLOGI for all
2581  * the nodes that need recovery. If none of the PLOGI were needed through
2582  * the lpfc_els_disc_plogi() routine, the lpfc_end_rscn() routine shall be
2583  * invoked to check and handle possible more RSCN came in during the period
2584  * of processing the current ones.
2585  **/
2586 static void
2587 lpfc_rscn_disc(struct lpfc_vport *vport)
2588 {
2589         lpfc_can_disctmo(vport);
2590
2591         /* RSCN discovery */
2592         /* go thru NPR nodes and issue ELS PLOGIs */
2593         if (vport->fc_npr_cnt)
2594                 if (lpfc_els_disc_plogi(vport))
2595                         return;
2596
2597         lpfc_end_rscn(vport);
2598 }
2599
2600 /**
2601  * lpfc_adisc_done - Complete the adisc phase of discovery
2602  * @vport: pointer to lpfc_vport hba data structure that finished all ADISCs.
2603  *
2604  * This function is called when the final ADISC is completed during discovery.
2605  * This function handles clearing link attention or issuing reg_vpi depending
2606  * on whether npiv is enabled. This function also kicks off the PLOGI phase of
2607  * discovery.
2608  * This function is called with no locks held.
2609  **/
2610 static void
2611 lpfc_adisc_done(struct lpfc_vport *vport)
2612 {
2613         struct Scsi_Host   *shost = lpfc_shost_from_vport(vport);
2614         struct lpfc_hba   *phba = vport->phba;
2615
2616         /*
2617          * For NPIV, cmpl_reg_vpi will set port_state to READY,
2618          * and continue discovery.
2619          */
2620         if ((phba->sli3_options & LPFC_SLI3_NPIV_ENABLED) &&
2621             !(vport->fc_flag & FC_RSCN_MODE) &&
2622             (phba->sli_rev < LPFC_SLI_REV4)) {
2623
2624                 /*
2625                  * If link is down, clear_la and reg_vpi will be done after
2626                  * flogi following a link up event
2627                  */
2628                 if (!lpfc_is_link_up(phba))
2629                         return;
2630
2631                 /* The ADISCs are complete.  Doesn't matter if they
2632                  * succeeded or failed because the ADISC completion
2633                  * routine guarantees to call the state machine and
2634                  * the RPI is either unregistered (failed ADISC response)
2635                  * or the RPI is still valid and the node is marked
2636                  * mapped for a target.  The exchanges should be in the
2637                  * correct state. This code is specific to SLI3.
2638                  */
2639                 lpfc_issue_clear_la(phba, vport);
2640                 lpfc_issue_reg_vpi(phba, vport);
2641                 return;
2642         }
2643         /*
2644         * For SLI2, we need to set port_state to READY
2645         * and continue discovery.
2646         */
2647         if (vport->port_state < LPFC_VPORT_READY) {
2648                 /* If we get here, there is nothing to ADISC */
2649                 lpfc_issue_clear_la(phba, vport);
2650                 if (!(vport->fc_flag & FC_ABORT_DISCOVERY)) {
2651                         vport->num_disc_nodes = 0;
2652                         /* go thru NPR list, issue ELS PLOGIs */
2653                         if (vport->fc_npr_cnt)
2654                                 lpfc_els_disc_plogi(vport);
2655                         if (!vport->num_disc_nodes) {
2656                                 spin_lock_irq(shost->host_lock);
2657                                 vport->fc_flag &= ~FC_NDISC_ACTIVE;
2658                                 spin_unlock_irq(shost->host_lock);
2659                                 lpfc_can_disctmo(vport);
2660                                 lpfc_end_rscn(vport);
2661                         }
2662                 }
2663                 vport->port_state = LPFC_VPORT_READY;
2664         } else
2665                 lpfc_rscn_disc(vport);
2666 }
2667
2668 /**
2669  * lpfc_more_adisc - Issue more adisc as needed
2670  * @vport: pointer to a host virtual N_Port data structure.
2671  *
2672  * This routine determines whether there are more ndlps on a @vport
2673  * node list need to have Address Discover (ADISC) issued. If so, it will
2674  * invoke the lpfc_els_disc_adisc() routine to issue ADISC on the @vport's
2675  * remaining nodes which need to have ADISC sent.
2676  **/
2677 void
2678 lpfc_more_adisc(struct lpfc_vport *vport)
2679 {
2680         if (vport->num_disc_nodes)
2681                 vport->num_disc_nodes--;
2682         /* Continue discovery with <num_disc_nodes> ADISCs to go */
2683         lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
2684                          "0210 Continue discovery with %d ADISCs to go "
2685                          "Data: x%x x%x x%x\n",
2686                          vport->num_disc_nodes, vport->fc_adisc_cnt,
2687                          vport->fc_flag, vport->port_state);
2688         /* Check to see if there are more ADISCs to be sent */
2689         if (vport->fc_flag & FC_NLP_MORE) {
2690                 lpfc_set_disctmo(vport);
2691                 /* go thru NPR nodes and issue any remaining ELS ADISCs */
2692                 lpfc_els_disc_adisc(vport);
2693         }
2694         if (!vport->num_disc_nodes)
2695                 lpfc_adisc_done(vport);
2696         return;
2697 }
2698
2699 /**
2700  * lpfc_cmpl_els_adisc - Completion callback function for adisc
2701  * @phba: pointer to lpfc hba data structure.
2702  * @cmdiocb: pointer to lpfc command iocb data structure.
2703  * @rspiocb: pointer to lpfc response iocb data structure.
2704  *
2705  * This routine is the completion function for issuing the Address Discover
2706  * (ADISC) command. It first checks to see whether link went down during
2707  * the discovery process. If so, the node will be marked as node port
2708  * recovery for issuing discover IOCB by the link attention handler and
2709  * exit. Otherwise, the response status is checked. If error was reported
2710  * in the response status, the ADISC command shall be retried by invoking
2711  * the lpfc_els_retry() routine. Otherwise, if no error was reported in
2712  * the response status, the state machine is invoked to set transition
2713  * with respect to NLP_EVT_CMPL_ADISC event.
2714  **/
2715 static void
2716 lpfc_cmpl_els_adisc(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
2717                     struct lpfc_iocbq *rspiocb)
2718 {
2719         struct lpfc_vport *vport = cmdiocb->vport;
2720         IOCB_t *irsp;
2721         struct lpfc_nodelist *ndlp;
2722         int  disc;
2723
2724         /* we pass cmdiocb to state machine which needs rspiocb as well */
2725         cmdiocb->context_un.rsp_iocb = rspiocb;
2726
2727         irsp = &(rspiocb->iocb);
2728         ndlp = (struct lpfc_nodelist *) cmdiocb->context1;
2729
2730         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
2731                 "ADISC cmpl:      status:x%x/x%x did:x%x",
2732                 irsp->ulpStatus, irsp->un.ulpWord[4],
2733                 ndlp->nlp_DID);
2734
2735         /* Since ndlp can be freed in the disc state machine, note if this node
2736          * is being used during discovery.
2737          */
2738         spin_lock_irq(&ndlp->lock);
2739         disc = (ndlp->nlp_flag & NLP_NPR_2B_DISC);
2740         ndlp->nlp_flag &= ~(NLP_ADISC_SND | NLP_NPR_2B_DISC);
2741         spin_unlock_irq(&ndlp->lock);
2742         /* ADISC completes to NPort <nlp_DID> */
2743         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
2744                          "0104 ADISC completes to NPort x%x "
2745                          "Data: x%x x%x x%x x%x x%x\n",
2746                          ndlp->nlp_DID, irsp->ulpStatus, irsp->un.ulpWord[4],
2747                          irsp->ulpTimeout, disc, vport->num_disc_nodes);
2748         /* Check to see if link went down during discovery */
2749         if (lpfc_els_chk_latt(vport)) {
2750                 spin_lock_irq(&ndlp->lock);
2751                 ndlp->nlp_flag |= NLP_NPR_2B_DISC;
2752                 spin_unlock_irq(&ndlp->lock);
2753                 goto out;
2754         }
2755
2756         if (irsp->ulpStatus) {
2757                 /* Check for retry */
2758                 if (lpfc_els_retry(phba, cmdiocb, rspiocb)) {
2759                         /* ELS command is being retried */
2760                         if (disc) {
2761                                 spin_lock_irq(&ndlp->lock);
2762                                 ndlp->nlp_flag |= NLP_NPR_2B_DISC;
2763                                 spin_unlock_irq(&ndlp->lock);
2764                                 lpfc_set_disctmo(vport);
2765                         }
2766                         goto out;
2767                 }
2768                 /* ADISC failed */
2769                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
2770                                  "2755 ADISC failure DID:%06X Status:x%x/x%x\n",
2771                                  ndlp->nlp_DID, irsp->ulpStatus,
2772                                  irsp->un.ulpWord[4]);
2773
2774                 lpfc_disc_state_machine(vport, ndlp, cmdiocb,
2775                                 NLP_EVT_CMPL_ADISC);
2776
2777                 /* As long as this node is not registered with the SCSI or NVMe
2778                  * transport, it is no longer an active node. Otherwise
2779                  * devloss handles the final cleanup.
2780                  */
2781                 if (!(ndlp->fc4_xpt_flags & (SCSI_XPT_REGD | NVME_XPT_REGD))) {
2782                         spin_lock_irq(&ndlp->lock);
2783                         ndlp->nlp_flag &= ~NLP_NPR_2B_DISC;
2784                         spin_unlock_irq(&ndlp->lock);
2785                         lpfc_disc_state_machine(vport, ndlp, cmdiocb,
2786                                                 NLP_EVT_DEVICE_RM);
2787                 }
2788         } else
2789                 /* Good status, call state machine */
2790                 lpfc_disc_state_machine(vport, ndlp, cmdiocb,
2791                                         NLP_EVT_CMPL_ADISC);
2792
2793         /* Check to see if there are more ADISCs to be sent */
2794         if (disc && vport->num_disc_nodes)
2795                 lpfc_more_adisc(vport);
2796 out:
2797         lpfc_els_free_iocb(phba, cmdiocb);
2798         lpfc_nlp_put(ndlp);
2799         return;
2800 }
2801
2802 /**
2803  * lpfc_issue_els_adisc - Issue an address discover iocb to an node on a vport
2804  * @vport: pointer to a virtual N_Port data structure.
2805  * @ndlp: pointer to a node-list data structure.
2806  * @retry: number of retries to the command IOCB.
2807  *
2808  * This routine issues an Address Discover (ADISC) for an @ndlp on a
2809  * @vport. It prepares the payload of the ADISC ELS command, updates the
2810  * and states of the ndlp, and invokes the lpfc_sli_issue_iocb() routine
2811  * to issue the ADISC ELS command.
2812  *
2813  * Note that the ndlp reference count will be incremented by 1 for holding the
2814  * ndlp and the reference to ndlp will be stored into the context1 field of
2815  * the IOCB for the completion callback function to the ADISC ELS command.
2816  *
2817  * Return code
2818  *   0 - successfully issued adisc
2819  *   1 - failed to issue adisc
2820  **/
2821 int
2822 lpfc_issue_els_adisc(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
2823                      uint8_t retry)
2824 {
2825         int rc = 0;
2826         struct lpfc_hba  *phba = vport->phba;
2827         ADISC *ap;
2828         struct lpfc_iocbq *elsiocb;
2829         uint8_t *pcmd;
2830         uint16_t cmdsize;
2831
2832         cmdsize = (sizeof(uint32_t) + sizeof(ADISC));
2833         elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, retry, ndlp,
2834                                      ndlp->nlp_DID, ELS_CMD_ADISC);
2835         if (!elsiocb)
2836                 return 1;
2837
2838         pcmd = (uint8_t *) (((struct lpfc_dmabuf *) elsiocb->context2)->virt);
2839
2840         /* For ADISC request, remainder of payload is service parameters */
2841         *((uint32_t *) (pcmd)) = ELS_CMD_ADISC;
2842         pcmd += sizeof(uint32_t);
2843
2844         /* Fill in ADISC payload */
2845         ap = (ADISC *) pcmd;
2846         ap->hardAL_PA = phba->fc_pref_ALPA;
2847         memcpy(&ap->portName, &vport->fc_portname, sizeof(struct lpfc_name));
2848         memcpy(&ap->nodeName, &vport->fc_nodename, sizeof(struct lpfc_name));
2849         ap->DID = be32_to_cpu(vport->fc_myDID);
2850
2851         phba->fc_stat.elsXmitADISC++;
2852         elsiocb->iocb_cmpl = lpfc_cmpl_els_adisc;
2853         spin_lock_irq(&ndlp->lock);
2854         ndlp->nlp_flag |= NLP_ADISC_SND;
2855         spin_unlock_irq(&ndlp->lock);
2856         elsiocb->context1 = lpfc_nlp_get(ndlp);
2857         if (!elsiocb->context1) {
2858                 lpfc_els_free_iocb(phba, elsiocb);
2859                 goto err;
2860         }
2861
2862         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
2863                               "Issue ADISC:   did:x%x refcnt %d",
2864                               ndlp->nlp_DID, kref_read(&ndlp->kref), 0);
2865         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
2866         if (rc == IOCB_ERROR) {
2867                 lpfc_els_free_iocb(phba, elsiocb);
2868                 lpfc_nlp_put(ndlp);
2869                 goto err;
2870         }
2871
2872         return 0;
2873
2874 err:
2875         spin_lock_irq(&ndlp->lock);
2876         ndlp->nlp_flag &= ~NLP_ADISC_SND;
2877         spin_unlock_irq(&ndlp->lock);
2878         return 1;
2879 }
2880
2881 /**
2882  * lpfc_cmpl_els_logo - Completion callback function for logo
2883  * @phba: pointer to lpfc hba data structure.
2884  * @cmdiocb: pointer to lpfc command iocb data structure.
2885  * @rspiocb: pointer to lpfc response iocb data structure.
2886  *
2887  * This routine is the completion function for issuing the ELS Logout (LOGO)
2888  * command. If no error status was reported from the LOGO response, the
2889  * state machine of the associated ndlp shall be invoked for transition with
2890  * respect to NLP_EVT_CMPL_LOGO event.
2891  **/
2892 static void
2893 lpfc_cmpl_els_logo(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
2894                    struct lpfc_iocbq *rspiocb)
2895 {
2896         struct lpfc_nodelist *ndlp = (struct lpfc_nodelist *) cmdiocb->context1;
2897         struct lpfc_vport *vport = ndlp->vport;
2898         IOCB_t *irsp;
2899         unsigned long flags;
2900         uint32_t skip_recovery = 0;
2901         int wake_up_waiter = 0;
2902
2903         /* we pass cmdiocb to state machine which needs rspiocb as well */
2904         cmdiocb->context_un.rsp_iocb = rspiocb;
2905
2906         irsp = &(rspiocb->iocb);
2907         spin_lock_irq(&ndlp->lock);
2908         ndlp->nlp_flag &= ~NLP_LOGO_SND;
2909         if (ndlp->save_flags & NLP_WAIT_FOR_LOGO) {
2910                 wake_up_waiter = 1;
2911                 ndlp->save_flags &= ~NLP_WAIT_FOR_LOGO;
2912         }
2913         spin_unlock_irq(&ndlp->lock);
2914
2915         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
2916                 "LOGO cmpl:       status:x%x/x%x did:x%x",
2917                 irsp->ulpStatus, irsp->un.ulpWord[4],
2918                 ndlp->nlp_DID);
2919
2920         /* LOGO completes to NPort <nlp_DID> */
2921         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
2922                          "0105 LOGO completes to NPort x%x "
2923                          "refcnt %d nflags x%x Data: x%x x%x x%x x%x\n",
2924                          ndlp->nlp_DID, kref_read(&ndlp->kref), ndlp->nlp_flag,
2925                          irsp->ulpStatus, irsp->un.ulpWord[4],
2926                          irsp->ulpTimeout, vport->num_disc_nodes);
2927
2928         if (lpfc_els_chk_latt(vport)) {
2929                 skip_recovery = 1;
2930                 goto out;
2931         }
2932
2933         /* The LOGO will not be retried on failure.  A LOGO was
2934          * issued to the remote rport and a ACC or RJT or no Answer are
2935          * all acceptable.  Note the failure and move forward with
2936          * discovery.  The PLOGI will retry.
2937          */
2938         if (irsp->ulpStatus) {
2939                 /* LOGO failed */
2940                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
2941                                  "2756 LOGO failure, No Retry DID:%06X Status:x%x/x%x\n",
2942                                  ndlp->nlp_DID, irsp->ulpStatus,
2943                                  irsp->un.ulpWord[4]);
2944                 /* Do not call DSM for lpfc_els_abort'ed ELS cmds */
2945                 if (lpfc_error_lost_link(irsp)) {
2946                         skip_recovery = 1;
2947                         goto out;
2948                 }
2949         }
2950
2951         /* Call state machine. This will unregister the rpi if needed. */
2952         lpfc_disc_state_machine(vport, ndlp, cmdiocb, NLP_EVT_CMPL_LOGO);
2953
2954         /* The driver sets this flag for an NPIV instance that doesn't want to
2955          * log into the remote port.
2956          */
2957         if (ndlp->nlp_flag & NLP_TARGET_REMOVE) {
2958                 spin_lock_irq(&ndlp->lock);
2959                 if (phba->sli_rev == LPFC_SLI_REV4)
2960                         ndlp->nlp_flag |= NLP_RELEASE_RPI;
2961                 ndlp->nlp_flag &= ~NLP_NPR_2B_DISC;
2962                 spin_unlock_irq(&ndlp->lock);
2963                 lpfc_disc_state_machine(vport, ndlp, cmdiocb,
2964                                         NLP_EVT_DEVICE_RM);
2965                 lpfc_els_free_iocb(phba, cmdiocb);
2966                 lpfc_nlp_put(ndlp);
2967
2968                 /* Presume the node was released. */
2969                 return;
2970         }
2971
2972 out:
2973         /* Driver is done with the IO.  */
2974         lpfc_els_free_iocb(phba, cmdiocb);
2975         lpfc_nlp_put(ndlp);
2976
2977         /* At this point, the LOGO processing is complete. NOTE: For a
2978          * pt2pt topology, we are assuming the NPortID will only change
2979          * on link up processing. For a LOGO / PLOGI initiated by the
2980          * Initiator, we are assuming the NPortID is not going to change.
2981          */
2982
2983         if (wake_up_waiter && ndlp->logo_waitq)
2984                 wake_up(ndlp->logo_waitq);
2985         /*
2986          * If the node is a target, the handling attempts to recover the port.
2987          * For any other port type, the rpi is unregistered as an implicit
2988          * LOGO.
2989          */
2990         if (ndlp->nlp_type & (NLP_FCP_TARGET | NLP_NVME_TARGET) &&
2991             skip_recovery == 0) {
2992                 lpfc_cancel_retry_delay_tmo(vport, ndlp);
2993                 spin_lock_irqsave(&ndlp->lock, flags);
2994                 ndlp->nlp_flag |= NLP_NPR_2B_DISC;
2995                 spin_unlock_irqrestore(&ndlp->lock, flags);
2996
2997                 lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
2998                                  "3187 LOGO completes to NPort x%x: Start "
2999                                  "Recovery Data: x%x x%x x%x x%x\n",
3000                                  ndlp->nlp_DID, irsp->ulpStatus,
3001                                  irsp->un.ulpWord[4], irsp->ulpTimeout,
3002                                  vport->num_disc_nodes);
3003                 lpfc_disc_start(vport);
3004                 return;
3005         }
3006
3007         /* Cleanup path for failed REG_RPI handling. If REG_RPI fails, the
3008          * driver sends a LOGO to the rport to cleanup.  For fabric and
3009          * initiator ports cleanup the node as long as it the node is not
3010          * register with the transport.
3011          */
3012         if (!(ndlp->fc4_xpt_flags & (SCSI_XPT_REGD | NVME_XPT_REGD))) {
3013                 spin_lock_irq(&ndlp->lock);
3014                 ndlp->nlp_flag &= ~NLP_NPR_2B_DISC;
3015                 spin_unlock_irq(&ndlp->lock);
3016                 lpfc_disc_state_machine(vport, ndlp, cmdiocb,
3017                                         NLP_EVT_DEVICE_RM);
3018         }
3019 }
3020
3021 /**
3022  * lpfc_issue_els_logo - Issue a logo to an node on a vport
3023  * @vport: pointer to a virtual N_Port data structure.
3024  * @ndlp: pointer to a node-list data structure.
3025  * @retry: number of retries to the command IOCB.
3026  *
3027  * This routine constructs and issues an ELS Logout (LOGO) iocb command
3028  * to a remote node, referred by an @ndlp on a @vport. It constructs the
3029  * payload of the IOCB, properly sets up the @ndlp state, and invokes the
3030  * lpfc_sli_issue_iocb() routine to send out the LOGO ELS command.
3031  *
3032  * Note that the ndlp reference count will be incremented by 1 for holding the
3033  * ndlp and the reference to ndlp will be stored into the context1 field of
3034  * the IOCB for the completion callback function to the LOGO ELS command.
3035  *
3036  * Callers of this routine are expected to unregister the RPI first
3037  *
3038  * Return code
3039  *   0 - successfully issued logo
3040  *   1 - failed to issue logo
3041  **/
3042 int
3043 lpfc_issue_els_logo(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
3044                     uint8_t retry)
3045 {
3046         struct lpfc_hba  *phba = vport->phba;
3047         struct lpfc_iocbq *elsiocb;
3048         uint8_t *pcmd;
3049         uint16_t cmdsize;
3050         int rc;
3051
3052         spin_lock_irq(&ndlp->lock);
3053         if (ndlp->nlp_flag & NLP_LOGO_SND) {
3054                 spin_unlock_irq(&ndlp->lock);
3055                 return 0;
3056         }
3057         spin_unlock_irq(&ndlp->lock);
3058
3059         cmdsize = (2 * sizeof(uint32_t)) + sizeof(struct lpfc_name);
3060         elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, retry, ndlp,
3061                                      ndlp->nlp_DID, ELS_CMD_LOGO);
3062         if (!elsiocb)
3063                 return 1;
3064
3065         pcmd = (uint8_t *) (((struct lpfc_dmabuf *) elsiocb->context2)->virt);
3066         *((uint32_t *) (pcmd)) = ELS_CMD_LOGO;
3067         pcmd += sizeof(uint32_t);
3068
3069         /* Fill in LOGO payload */
3070         *((uint32_t *) (pcmd)) = be32_to_cpu(vport->fc_myDID);
3071         pcmd += sizeof(uint32_t);
3072         memcpy(pcmd, &vport->fc_portname, sizeof(struct lpfc_name));
3073
3074         phba->fc_stat.elsXmitLOGO++;
3075         elsiocb->iocb_cmpl = lpfc_cmpl_els_logo;
3076         spin_lock_irq(&ndlp->lock);
3077         ndlp->nlp_flag |= NLP_LOGO_SND;
3078         ndlp->nlp_flag &= ~NLP_ISSUE_LOGO;
3079         spin_unlock_irq(&ndlp->lock);
3080         elsiocb->context1 = lpfc_nlp_get(ndlp);
3081         if (!elsiocb->context1) {
3082                 lpfc_els_free_iocb(phba, elsiocb);
3083                 goto err;
3084         }
3085
3086         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
3087                               "Issue LOGO:      did:x%x refcnt %d",
3088                               ndlp->nlp_DID, kref_read(&ndlp->kref), 0);
3089         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
3090         if (rc == IOCB_ERROR) {
3091                 lpfc_els_free_iocb(phba, elsiocb);
3092                 lpfc_nlp_put(ndlp);
3093                 goto err;
3094         }
3095
3096         spin_lock_irq(&ndlp->lock);
3097         ndlp->nlp_prev_state = ndlp->nlp_state;
3098         spin_unlock_irq(&ndlp->lock);
3099         lpfc_nlp_set_state(vport, ndlp, NLP_STE_LOGO_ISSUE);
3100         return 0;
3101
3102 err:
3103         spin_lock_irq(&ndlp->lock);
3104         ndlp->nlp_flag &= ~NLP_LOGO_SND;
3105         spin_unlock_irq(&ndlp->lock);
3106         return 1;
3107 }
3108
3109 /**
3110  * lpfc_cmpl_els_cmd - Completion callback function for generic els command
3111  * @phba: pointer to lpfc hba data structure.
3112  * @cmdiocb: pointer to lpfc command iocb data structure.
3113  * @rspiocb: pointer to lpfc response iocb data structure.
3114  *
3115  * This routine is a generic completion callback function for ELS commands.
3116  * Specifically, it is the callback function which does not need to perform
3117  * any command specific operations. It is currently used by the ELS command
3118  * issuing routines for RSCN, lpfc_issue_els_rscn, and the ELS Fibre Channel
3119  * Address Resolution Protocol Response (FARPR) routine, lpfc_issue_els_farpr().
3120  * Other than certain debug loggings, this callback function simply invokes the
3121  * lpfc_els_chk_latt() routine to check whether link went down during the
3122  * discovery process.
3123  **/
3124 static void
3125 lpfc_cmpl_els_cmd(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
3126                   struct lpfc_iocbq *rspiocb)
3127 {
3128         struct lpfc_vport *vport = cmdiocb->vport;
3129         struct lpfc_nodelist *free_ndlp;
3130         IOCB_t *irsp;
3131
3132         irsp = &rspiocb->iocb;
3133
3134         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
3135                               "ELS cmd cmpl:    status:x%x/x%x did:x%x",
3136                               irsp->ulpStatus, irsp->un.ulpWord[4],
3137                               irsp->un.elsreq64.remoteID);
3138
3139         /* ELS cmd tag <ulpIoTag> completes */
3140         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
3141                          "0106 ELS cmd tag x%x completes Data: x%x x%x x%x\n",
3142                          irsp->ulpIoTag, irsp->ulpStatus,
3143                          irsp->un.ulpWord[4], irsp->ulpTimeout);
3144
3145         /* Check to see if link went down during discovery */
3146         lpfc_els_chk_latt(vport);
3147
3148         free_ndlp = (struct lpfc_nodelist *)cmdiocb->context1;
3149
3150         lpfc_els_free_iocb(phba, cmdiocb);
3151         lpfc_nlp_put(free_ndlp);
3152 }
3153
3154 /**
3155  * lpfc_reg_fab_ctrl_node - RPI register the fabric controller node.
3156  * @vport: pointer to lpfc_vport data structure.
3157  * @fc_ndlp: pointer to the fabric controller (0xfffffd) node.
3158  *
3159  * This routine registers the rpi assigned to the fabric controller
3160  * NPort_ID (0xfffffd) with the port and moves the node to UNMAPPED
3161  * state triggering a registration with the SCSI transport.
3162  *
3163  * This routine is single out because the fabric controller node
3164  * does not receive a PLOGI.  This routine is consumed by the
3165  * SCR and RDF ELS commands.  Callers are expected to qualify
3166  * with SLI4 first.
3167  **/
3168 static int
3169 lpfc_reg_fab_ctrl_node(struct lpfc_vport *vport, struct lpfc_nodelist *fc_ndlp)
3170 {
3171         int rc = 0;
3172         struct lpfc_hba *phba = vport->phba;
3173         struct lpfc_nodelist *ns_ndlp;
3174         LPFC_MBOXQ_t *mbox;
3175         struct lpfc_dmabuf *mp;
3176
3177         if (fc_ndlp->nlp_flag & NLP_RPI_REGISTERED)
3178                 return rc;
3179
3180         ns_ndlp = lpfc_findnode_did(vport, NameServer_DID);
3181         if (!ns_ndlp)
3182                 return -ENODEV;
3183
3184         lpfc_printf_vlog(vport, KERN_INFO, LOG_NODE,
3185                          "0935 %s: Reg FC RPI x%x on FC DID x%x NSSte: x%x\n",
3186                          __func__, fc_ndlp->nlp_rpi, fc_ndlp->nlp_DID,
3187                          ns_ndlp->nlp_state);
3188         if (ns_ndlp->nlp_state != NLP_STE_UNMAPPED_NODE)
3189                 return -ENODEV;
3190
3191         mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
3192         if (!mbox) {
3193                 lpfc_printf_vlog(vport, KERN_ERR, LOG_NODE,
3194                                  "0936 %s: no memory for reg_login "
3195                                  "Data: x%x x%x x%x x%x\n", __func__,
3196                                  fc_ndlp->nlp_DID, fc_ndlp->nlp_state,
3197                                  fc_ndlp->nlp_flag, fc_ndlp->nlp_rpi);
3198                 return -ENOMEM;
3199         }
3200         rc = lpfc_reg_rpi(phba, vport->vpi, fc_ndlp->nlp_DID,
3201                           (u8 *)&vport->fc_sparam, mbox, fc_ndlp->nlp_rpi);
3202         if (rc) {
3203                 rc = -EACCES;
3204                 goto out;
3205         }
3206
3207         fc_ndlp->nlp_flag |= NLP_REG_LOGIN_SEND;
3208         mbox->mbox_cmpl = lpfc_mbx_cmpl_fc_reg_login;
3209         mbox->ctx_ndlp = lpfc_nlp_get(fc_ndlp);
3210         if (!mbox->ctx_ndlp) {
3211                 rc = -ENOMEM;
3212                 goto out_mem;
3213         }
3214
3215         mbox->vport = vport;
3216         rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
3217         if (rc == MBX_NOT_FINISHED) {
3218                 rc = -ENODEV;
3219                 lpfc_nlp_put(fc_ndlp);
3220                 goto out_mem;
3221         }
3222         /* Success path. Exit. */
3223         lpfc_nlp_set_state(vport, fc_ndlp,
3224                            NLP_STE_REG_LOGIN_ISSUE);
3225         return 0;
3226
3227  out_mem:
3228         fc_ndlp->nlp_flag &= ~NLP_REG_LOGIN_SEND;
3229         mp = (struct lpfc_dmabuf *)mbox->ctx_buf;
3230         lpfc_mbuf_free(phba, mp->virt, mp->phys);
3231         kfree(mp);
3232
3233  out:
3234         mempool_free(mbox, phba->mbox_mem_pool);
3235         lpfc_printf_vlog(vport, KERN_ERR, LOG_NODE,
3236                          "0938 %s: failed to format reg_login "
3237                          "Data: x%x x%x x%x x%x\n", __func__,
3238                          fc_ndlp->nlp_DID, fc_ndlp->nlp_state,
3239                          fc_ndlp->nlp_flag, fc_ndlp->nlp_rpi);
3240         return rc;
3241 }
3242
3243 /**
3244  * lpfc_cmpl_els_disc_cmd - Completion callback function for Discovery ELS cmd
3245  * @phba: pointer to lpfc hba data structure.
3246  * @cmdiocb: pointer to lpfc command iocb data structure.
3247  * @rspiocb: pointer to lpfc response iocb data structure.
3248  *
3249  * This routine is a generic completion callback function for Discovery ELS cmd.
3250  * Currently used by the ELS command issuing routines for the ELS State Change
3251  * Request (SCR), lpfc_issue_els_scr() and the ELS RDF, lpfc_issue_els_rdf().
3252  * These commands will be retried once only for ELS timeout errors.
3253  **/
3254 static void
3255 lpfc_cmpl_els_disc_cmd(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
3256                        struct lpfc_iocbq *rspiocb)
3257 {
3258         struct lpfc_vport *vport = cmdiocb->vport;
3259         IOCB_t *irsp;
3260         struct lpfc_els_rdf_rsp *prdf;
3261         struct lpfc_dmabuf *pcmd, *prsp;
3262         u32 *pdata;
3263         u32 cmd;
3264         struct lpfc_nodelist *ndlp = cmdiocb->context1;
3265
3266         irsp = &rspiocb->iocb;
3267
3268         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
3269                 "ELS cmd cmpl:    status:x%x/x%x did:x%x",
3270                 irsp->ulpStatus, irsp->un.ulpWord[4],
3271                 irsp->un.elsreq64.remoteID);
3272         /* ELS cmd tag <ulpIoTag> completes */
3273         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS | LOG_CGN_MGMT,
3274                          "0217 ELS cmd tag x%x completes Data: x%x x%x x%x "
3275                          "x%x\n",
3276                          irsp->ulpIoTag, irsp->ulpStatus,
3277                          irsp->un.ulpWord[4], irsp->ulpTimeout,
3278                          cmdiocb->retry);
3279
3280         pcmd = (struct lpfc_dmabuf *)cmdiocb->context2;
3281         if (!pcmd)
3282                 goto out;
3283
3284         pdata = (u32 *)pcmd->virt;
3285         if (!pdata)
3286                 goto out;
3287         cmd = *pdata;
3288
3289         /* Only 1 retry for ELS Timeout only */
3290         if (irsp->ulpStatus == IOSTAT_LOCAL_REJECT &&
3291             ((irsp->un.ulpWord[4] & IOERR_PARAM_MASK) ==
3292             IOERR_SEQUENCE_TIMEOUT)) {
3293                 cmdiocb->retry++;
3294                 if (cmdiocb->retry <= 1) {
3295                         switch (cmd) {
3296                         case ELS_CMD_SCR:
3297                                 lpfc_issue_els_scr(vport, cmdiocb->retry);
3298                                 break;
3299                         case ELS_CMD_EDC:
3300                                 lpfc_issue_els_edc(vport, cmdiocb->retry);
3301                                 break;
3302                         case ELS_CMD_RDF:
3303                                 cmdiocb->context1 = NULL; /* save ndlp refcnt */
3304                                 lpfc_issue_els_rdf(vport, cmdiocb->retry);
3305                                 break;
3306                         }
3307                         goto out;
3308                 }
3309                 phba->fc_stat.elsRetryExceeded++;
3310         }
3311         if (cmd == ELS_CMD_EDC) {
3312                 /* must be called before checking uplStatus and returning */
3313                 lpfc_cmpl_els_edc(phba, cmdiocb, rspiocb);
3314                 return;
3315         }
3316         if (irsp->ulpStatus) {
3317                 /* ELS discovery cmd completes with error */
3318                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_ELS,
3319                                  "4203 ELS cmd x%x error: x%x x%X\n", cmd,
3320                                  irsp->ulpStatus, irsp->un.ulpWord[4]);
3321                 goto out;
3322         }
3323
3324         /* The RDF response doesn't have any impact on the running driver
3325          * but the notification descriptors are dumped here for support.
3326          */
3327         if (cmd == ELS_CMD_RDF) {
3328                 int i;
3329
3330                 prsp = list_get_first(&pcmd->list, struct lpfc_dmabuf, list);
3331                 if (!prsp)
3332                         goto out;
3333
3334                 prdf = (struct lpfc_els_rdf_rsp *)prsp->virt;
3335                 if (!prdf)
3336                         goto out;
3337
3338                 for (i = 0; i < ELS_RDF_REG_TAG_CNT &&
3339                             i < be32_to_cpu(prdf->reg_d1.reg_desc.count); i++)
3340                         lpfc_printf_vlog(vport, KERN_INFO,
3341                                          LOG_ELS | LOG_CGN_MGMT,
3342                                          "4677 Fabric RDF Notification Grant "
3343                                          "Data: 0x%08x Reg: %x %x\n",
3344                                          be32_to_cpu(
3345                                                 prdf->reg_d1.desc_tags[i]),
3346                                          phba->cgn_reg_signal,
3347                                          phba->cgn_reg_fpin);
3348         }
3349
3350 out:
3351         /* Check to see if link went down during discovery */
3352         lpfc_els_chk_latt(vport);
3353         lpfc_els_free_iocb(phba, cmdiocb);
3354         lpfc_nlp_put(ndlp);
3355         return;
3356 }
3357
3358 /**
3359  * lpfc_issue_els_scr - Issue a scr to an node on a vport
3360  * @vport: pointer to a host virtual N_Port data structure.
3361  * @retry: retry counter for the command IOCB.
3362  *
3363  * This routine issues a State Change Request (SCR) to a fabric node
3364  * on a @vport. The remote node is Fabric Controller (0xfffffd). It
3365  * first search the @vport node list to find the matching ndlp. If no such
3366  * ndlp is found, a new ndlp shall be created for this (SCR) purpose. An
3367  * IOCB is allocated, payload prepared, and the lpfc_sli_issue_iocb()
3368  * routine is invoked to send the SCR IOCB.
3369  *
3370  * Note that the ndlp reference count will be incremented by 1 for holding the
3371  * ndlp and the reference to ndlp will be stored into the context1 field of
3372  * the IOCB for the completion callback function to the SCR ELS command.
3373  *
3374  * Return code
3375  *   0 - Successfully issued scr command
3376  *   1 - Failed to issue scr command
3377  **/
3378 int
3379 lpfc_issue_els_scr(struct lpfc_vport *vport, uint8_t retry)
3380 {
3381         int rc = 0;
3382         struct lpfc_hba  *phba = vport->phba;
3383         struct lpfc_iocbq *elsiocb;
3384         uint8_t *pcmd;
3385         uint16_t cmdsize;
3386         struct lpfc_nodelist *ndlp;
3387
3388         cmdsize = (sizeof(uint32_t) + sizeof(SCR));
3389
3390         ndlp = lpfc_findnode_did(vport, Fabric_Cntl_DID);
3391         if (!ndlp) {
3392                 ndlp = lpfc_nlp_init(vport, Fabric_Cntl_DID);
3393                 if (!ndlp)
3394                         return 1;
3395                 lpfc_enqueue_node(vport, ndlp);
3396         }
3397
3398         elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, retry, ndlp,
3399                                      ndlp->nlp_DID, ELS_CMD_SCR);
3400         if (!elsiocb)
3401                 return 1;
3402
3403         if (phba->sli_rev == LPFC_SLI_REV4) {
3404                 rc = lpfc_reg_fab_ctrl_node(vport, ndlp);
3405                 if (rc) {
3406                         lpfc_els_free_iocb(phba, elsiocb);
3407                         lpfc_printf_vlog(vport, KERN_ERR, LOG_NODE,
3408                                          "0937 %s: Failed to reg fc node, rc %d\n",
3409                                          __func__, rc);
3410                         return 1;
3411                 }
3412         }
3413         pcmd = (uint8_t *) (((struct lpfc_dmabuf *) elsiocb->context2)->virt);
3414
3415         *((uint32_t *) (pcmd)) = ELS_CMD_SCR;
3416         pcmd += sizeof(uint32_t);
3417
3418         /* For SCR, remainder of payload is SCR parameter page */
3419         memset(pcmd, 0, sizeof(SCR));
3420         ((SCR *) pcmd)->Function = SCR_FUNC_FULL;
3421
3422         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
3423                 "Issue SCR:       did:x%x",
3424                 ndlp->nlp_DID, 0, 0);
3425
3426         phba->fc_stat.elsXmitSCR++;
3427         elsiocb->iocb_cmpl = lpfc_cmpl_els_disc_cmd;
3428         elsiocb->context1 = lpfc_nlp_get(ndlp);
3429         if (!elsiocb->context1) {
3430                 lpfc_els_free_iocb(phba, elsiocb);
3431                 return 1;
3432         }
3433
3434         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
3435                               "Issue SCR:     did:x%x refcnt %d",
3436                               ndlp->nlp_DID, kref_read(&ndlp->kref), 0);
3437
3438         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
3439         if (rc == IOCB_ERROR) {
3440                 lpfc_els_free_iocb(phba, elsiocb);
3441                 lpfc_nlp_put(ndlp);
3442                 return 1;
3443         }
3444
3445         return 0;
3446 }
3447
3448 /**
3449  * lpfc_issue_els_rscn - Issue an RSCN to the Fabric Controller (Fabric)
3450  *   or the other nport (pt2pt).
3451  * @vport: pointer to a host virtual N_Port data structure.
3452  * @retry: number of retries to the command IOCB.
3453  *
3454  * This routine issues a RSCN to the Fabric Controller (DID 0xFFFFFD)
3455  *  when connected to a fabric, or to the remote port when connected
3456  *  in point-to-point mode. When sent to the Fabric Controller, it will
3457  *  replay the RSCN to registered recipients.
3458  *
3459  * Note that the ndlp reference count will be incremented by 1 for holding the
3460  * ndlp and the reference to ndlp will be stored into the context1 field of
3461  * the IOCB for the completion callback function to the RSCN ELS command.
3462  *
3463  * Return code
3464  *   0 - Successfully issued RSCN command
3465  *   1 - Failed to issue RSCN command
3466  **/
3467 int
3468 lpfc_issue_els_rscn(struct lpfc_vport *vport, uint8_t retry)
3469 {
3470         int rc = 0;
3471         struct lpfc_hba *phba = vport->phba;
3472         struct lpfc_iocbq *elsiocb;
3473         struct lpfc_nodelist *ndlp;
3474         struct {
3475                 struct fc_els_rscn rscn;
3476                 struct fc_els_rscn_page portid;
3477         } *event;
3478         uint32_t nportid;
3479         uint16_t cmdsize = sizeof(*event);
3480
3481         /* Not supported for private loop */
3482         if (phba->fc_topology == LPFC_TOPOLOGY_LOOP &&
3483             !(vport->fc_flag & FC_PUBLIC_LOOP))
3484                 return 1;
3485
3486         if (vport->fc_flag & FC_PT2PT) {
3487                 /* find any mapped nport - that would be the other nport */
3488                 ndlp = lpfc_findnode_mapped(vport);
3489                 if (!ndlp)
3490                         return 1;
3491         } else {
3492                 nportid = FC_FID_FCTRL;
3493                 /* find the fabric controller node */
3494                 ndlp = lpfc_findnode_did(vport, nportid);
3495                 if (!ndlp) {
3496                         /* if one didn't exist, make one */
3497                         ndlp = lpfc_nlp_init(vport, nportid);
3498                         if (!ndlp)
3499                                 return 1;
3500                         lpfc_enqueue_node(vport, ndlp);
3501                 }
3502         }
3503
3504         elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, retry, ndlp,
3505                                      ndlp->nlp_DID, ELS_CMD_RSCN_XMT);
3506
3507         if (!elsiocb)
3508                 return 1;
3509
3510         event = ((struct lpfc_dmabuf *)elsiocb->context2)->virt;
3511
3512         event->rscn.rscn_cmd = ELS_RSCN;
3513         event->rscn.rscn_page_len = sizeof(struct fc_els_rscn_page);
3514         event->rscn.rscn_plen = cpu_to_be16(cmdsize);
3515
3516         nportid = vport->fc_myDID;
3517         /* appears that page flags must be 0 for fabric to broadcast RSCN */
3518         event->portid.rscn_page_flags = 0;
3519         event->portid.rscn_fid[0] = (nportid & 0x00FF0000) >> 16;
3520         event->portid.rscn_fid[1] = (nportid & 0x0000FF00) >> 8;
3521         event->portid.rscn_fid[2] = nportid & 0x000000FF;
3522
3523         phba->fc_stat.elsXmitRSCN++;
3524         elsiocb->iocb_cmpl = lpfc_cmpl_els_cmd;
3525         elsiocb->context1 = lpfc_nlp_get(ndlp);
3526         if (!elsiocb->context1) {
3527                 lpfc_els_free_iocb(phba, elsiocb);
3528                 return 1;
3529         }
3530
3531         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
3532                               "Issue RSCN:       did:x%x",
3533                               ndlp->nlp_DID, 0, 0);
3534
3535         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
3536         if (rc == IOCB_ERROR) {
3537                 lpfc_els_free_iocb(phba, elsiocb);
3538                 lpfc_nlp_put(ndlp);
3539                 return 1;
3540         }
3541
3542         return 0;
3543 }
3544
3545 /**
3546  * lpfc_issue_els_farpr - Issue a farp to an node on a vport
3547  * @vport: pointer to a host virtual N_Port data structure.
3548  * @nportid: N_Port identifier to the remote node.
3549  * @retry: number of retries to the command IOCB.
3550  *
3551  * This routine issues a Fibre Channel Address Resolution Response
3552  * (FARPR) to a node on a vport. The remote node N_Port identifier (@nportid)
3553  * is passed into the function. It first search the @vport node list to find
3554  * the matching ndlp. If no such ndlp is found, a new ndlp shall be created
3555  * for this (FARPR) purpose. An IOCB is allocated, payload prepared, and the
3556  * lpfc_sli_issue_iocb() routine is invoked to send the FARPR ELS command.
3557  *
3558  * Note that the ndlp reference count will be incremented by 1 for holding the
3559  * ndlp and the reference to ndlp will be stored into the context1 field of
3560  * the IOCB for the completion callback function to the FARPR ELS command.
3561  *
3562  * Return code
3563  *   0 - Successfully issued farpr command
3564  *   1 - Failed to issue farpr command
3565  **/
3566 static int
3567 lpfc_issue_els_farpr(struct lpfc_vport *vport, uint32_t nportid, uint8_t retry)
3568 {
3569         int rc = 0;
3570         struct lpfc_hba  *phba = vport->phba;
3571         struct lpfc_iocbq *elsiocb;
3572         FARP *fp;
3573         uint8_t *pcmd;
3574         uint32_t *lp;
3575         uint16_t cmdsize;
3576         struct lpfc_nodelist *ondlp;
3577         struct lpfc_nodelist *ndlp;
3578
3579         cmdsize = (sizeof(uint32_t) + sizeof(FARP));
3580
3581         ndlp = lpfc_findnode_did(vport, nportid);
3582         if (!ndlp) {
3583                 ndlp = lpfc_nlp_init(vport, nportid);
3584                 if (!ndlp)
3585                         return 1;
3586                 lpfc_enqueue_node(vport, ndlp);
3587         }
3588
3589         elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, retry, ndlp,
3590                                      ndlp->nlp_DID, ELS_CMD_RNID);
3591         if (!elsiocb)
3592                 return 1;
3593
3594         pcmd = (uint8_t *) (((struct lpfc_dmabuf *) elsiocb->context2)->virt);
3595
3596         *((uint32_t *) (pcmd)) = ELS_CMD_FARPR;
3597         pcmd += sizeof(uint32_t);
3598
3599         /* Fill in FARPR payload */
3600         fp = (FARP *) (pcmd);
3601         memset(fp, 0, sizeof(FARP));
3602         lp = (uint32_t *) pcmd;
3603         *lp++ = be32_to_cpu(nportid);
3604         *lp++ = be32_to_cpu(vport->fc_myDID);
3605         fp->Rflags = 0;
3606         fp->Mflags = (FARP_MATCH_PORT | FARP_MATCH_NODE);
3607
3608         memcpy(&fp->RportName, &vport->fc_portname, sizeof(struct lpfc_name));
3609         memcpy(&fp->RnodeName, &vport->fc_nodename, sizeof(struct lpfc_name));
3610         ondlp = lpfc_findnode_did(vport, nportid);
3611         if (ondlp) {
3612                 memcpy(&fp->OportName, &ondlp->nlp_portname,
3613                        sizeof(struct lpfc_name));
3614                 memcpy(&fp->OnodeName, &ondlp->nlp_nodename,
3615                        sizeof(struct lpfc_name));
3616         }
3617
3618         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
3619                 "Issue FARPR:     did:x%x",
3620                 ndlp->nlp_DID, 0, 0);
3621
3622         phba->fc_stat.elsXmitFARPR++;
3623         elsiocb->iocb_cmpl = lpfc_cmpl_els_cmd;
3624         elsiocb->context1 = lpfc_nlp_get(ndlp);
3625         if (!elsiocb->context1) {
3626                 lpfc_els_free_iocb(phba, elsiocb);
3627                 return 1;
3628         }
3629
3630         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
3631         if (rc == IOCB_ERROR) {
3632                 /* The additional lpfc_nlp_put will cause the following
3633                  * lpfc_els_free_iocb routine to trigger the release of
3634                  * the node.
3635                  */
3636                 lpfc_els_free_iocb(phba, elsiocb);
3637                 lpfc_nlp_put(ndlp);
3638                 return 1;
3639         }
3640         /* This will cause the callback-function lpfc_cmpl_els_cmd to
3641          * trigger the release of the node.
3642          */
3643         /* Don't release reference count as RDF is likely outstanding */
3644         return 0;
3645 }
3646
3647 /**
3648  * lpfc_issue_els_rdf - Register for diagnostic functions from the fabric.
3649  * @vport: pointer to a host virtual N_Port data structure.
3650  * @retry: retry counter for the command IOCB.
3651  *
3652  * This routine issues an ELS RDF to the Fabric Controller to register
3653  * for diagnostic functions.
3654  *
3655  * Note that the ndlp reference count will be incremented by 1 for holding the
3656  * ndlp and the reference to ndlp will be stored into the context1 field of
3657  * the IOCB for the completion callback function to the RDF ELS command.
3658  *
3659  * Return code
3660  *   0 - Successfully issued rdf command
3661  *   1 - Failed to issue rdf command
3662  **/
3663 int
3664 lpfc_issue_els_rdf(struct lpfc_vport *vport, uint8_t retry)
3665 {
3666         struct lpfc_hba *phba = vport->phba;
3667         struct lpfc_iocbq *elsiocb;
3668         struct lpfc_els_rdf_req *prdf;
3669         struct lpfc_nodelist *ndlp;
3670         uint16_t cmdsize;
3671         int rc;
3672
3673         cmdsize = sizeof(*prdf);
3674
3675         ndlp = lpfc_findnode_did(vport, Fabric_Cntl_DID);
3676         if (!ndlp) {
3677                 ndlp = lpfc_nlp_init(vport, Fabric_Cntl_DID);
3678                 if (!ndlp)
3679                         return -ENODEV;
3680                 lpfc_enqueue_node(vport, ndlp);
3681         }
3682
3683         /* RDF ELS is not required on an NPIV VN_Port. */
3684         if (vport->port_type == LPFC_NPIV_PORT)
3685                 return -EACCES;
3686
3687         elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, retry, ndlp,
3688                                      ndlp->nlp_DID, ELS_CMD_RDF);
3689         if (!elsiocb)
3690                 return -ENOMEM;
3691
3692         /* Configure the payload for the supported FPIN events. */
3693         prdf = (struct lpfc_els_rdf_req *)
3694                 (((struct lpfc_dmabuf *)elsiocb->context2)->virt);
3695         memset(prdf, 0, cmdsize);
3696         prdf->rdf.fpin_cmd = ELS_RDF;
3697         prdf->rdf.desc_len = cpu_to_be32(sizeof(struct lpfc_els_rdf_req) -
3698                                          sizeof(struct fc_els_rdf));
3699         prdf->reg_d1.reg_desc.desc_tag = cpu_to_be32(ELS_DTAG_FPIN_REGISTER);
3700         prdf->reg_d1.reg_desc.desc_len = cpu_to_be32(
3701                                 FC_TLV_DESC_LENGTH_FROM_SZ(prdf->reg_d1));
3702         prdf->reg_d1.reg_desc.count = cpu_to_be32(ELS_RDF_REG_TAG_CNT);
3703         prdf->reg_d1.desc_tags[0] = cpu_to_be32(ELS_DTAG_LNK_INTEGRITY);
3704         prdf->reg_d1.desc_tags[1] = cpu_to_be32(ELS_DTAG_DELIVERY);
3705         prdf->reg_d1.desc_tags[2] = cpu_to_be32(ELS_DTAG_PEER_CONGEST);
3706         prdf->reg_d1.desc_tags[3] = cpu_to_be32(ELS_DTAG_CONGESTION);
3707
3708         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS | LOG_CGN_MGMT,
3709                          "6444 Xmit RDF to remote NPORT x%x Reg: %x %x\n",
3710                          ndlp->nlp_DID, phba->cgn_reg_signal,
3711                          phba->cgn_reg_fpin);
3712
3713         phba->cgn_fpin_frequency = LPFC_FPIN_INIT_FREQ;
3714         elsiocb->iocb_cmpl = lpfc_cmpl_els_disc_cmd;
3715         elsiocb->context1 = lpfc_nlp_get(ndlp);
3716         if (!elsiocb->context1) {
3717                 lpfc_els_free_iocb(phba, elsiocb);
3718                 return -EIO;
3719         }
3720
3721         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
3722                               "Issue RDF:     did:x%x refcnt %d",
3723                               ndlp->nlp_DID, kref_read(&ndlp->kref), 0);
3724
3725         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
3726         if (rc == IOCB_ERROR) {
3727                 lpfc_els_free_iocb(phba, elsiocb);
3728                 lpfc_nlp_put(ndlp);
3729                 return -EIO;
3730         }
3731         return 0;
3732 }
3733
3734  /**
3735   * lpfc_els_rcv_rdf - Receive RDF ELS request from the fabric.
3736   * @vport: pointer to a host virtual N_Port data structure.
3737   * @cmdiocb: pointer to lpfc command iocb data structure.
3738   * @ndlp: pointer to a node-list data structure.
3739   *
3740   * A received RDF implies a possible change to fabric supported diagnostic
3741   * functions.  This routine sends LS_ACC and then has the Nx_Port issue a new
3742   * RDF request to reregister for supported diagnostic functions.
3743   *
3744   * Return code
3745   *   0 - Success
3746   *   -EIO - Failed to process received RDF
3747   **/
3748 static int
3749 lpfc_els_rcv_rdf(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
3750                  struct lpfc_nodelist *ndlp)
3751 {
3752         /* Send LS_ACC */
3753         if (lpfc_els_rsp_acc(vport, ELS_CMD_RDF, cmdiocb, ndlp, NULL)) {
3754                 lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS | LOG_CGN_MGMT,
3755                                  "1623 Failed to RDF_ACC from x%x for x%x\n",
3756                                  ndlp->nlp_DID, vport->fc_myDID);
3757                 return -EIO;
3758         }
3759
3760         /* Issue new RDF for reregistering */
3761         if (lpfc_issue_els_rdf(vport, 0)) {
3762                 lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS | LOG_CGN_MGMT,
3763                                  "2623 Failed to re register RDF for x%x\n",
3764                                  vport->fc_myDID);
3765                 return -EIO;
3766         }
3767
3768         return 0;
3769 }
3770
3771 /**
3772  * lpfc_least_capable_settings - helper function for EDC rsp processing
3773  * @phba: pointer to lpfc hba data structure.
3774  * @pcgd: pointer to congestion detection descriptor in EDC rsp.
3775  *
3776  * This helper routine determines the least capable setting for
3777  * congestion signals, signal freq, including scale, from the
3778  * congestion detection descriptor in the EDC rsp.  The routine
3779  * sets @phba values in preparation for a set_featues mailbox.
3780  **/
3781 static void
3782 lpfc_least_capable_settings(struct lpfc_hba *phba,
3783                             struct fc_diag_cg_sig_desc *pcgd)
3784 {
3785         u32 rsp_sig_cap = 0, drv_sig_cap = 0;
3786         u32 rsp_sig_freq_cyc = 0, rsp_sig_freq_scale = 0;
3787         struct lpfc_cgn_info *cp;
3788         u32 crc;
3789         u16 sig_freq;
3790
3791         /* Get rsp signal and frequency capabilities.  */
3792         rsp_sig_cap = be32_to_cpu(pcgd->xmt_signal_capability);
3793         rsp_sig_freq_cyc = be16_to_cpu(pcgd->xmt_signal_frequency.count);
3794         rsp_sig_freq_scale = be16_to_cpu(pcgd->xmt_signal_frequency.units);
3795
3796         /* If the Fport does not support signals. Set FPIN only */
3797         if (rsp_sig_cap == EDC_CG_SIG_NOTSUPPORTED)
3798                 goto out_no_support;
3799
3800         /* Apply the xmt scale to the xmt cycle to get the correct frequency.
3801          * Adapter default is 100 millisSeconds.  Convert all xmt cycle values
3802          * to milliSeconds.
3803          */
3804         switch (rsp_sig_freq_scale) {
3805         case EDC_CG_SIGFREQ_SEC:
3806                 rsp_sig_freq_cyc *= MSEC_PER_SEC;
3807                 break;
3808         case EDC_CG_SIGFREQ_MSEC:
3809                 rsp_sig_freq_cyc = 1;
3810                 break;
3811         default:
3812                 goto out_no_support;
3813         }
3814
3815         /* Convenient shorthand. */
3816         drv_sig_cap = phba->cgn_reg_signal;
3817
3818         /* Choose the least capable frequency. */
3819         if (rsp_sig_freq_cyc > phba->cgn_sig_freq)
3820                 phba->cgn_sig_freq = rsp_sig_freq_cyc;
3821
3822         /* Should be some common signals support. Settle on least capable
3823          * signal and adjust FPIN values. Initialize defaults to ease the
3824          * decision.
3825          */
3826         phba->cgn_reg_fpin = LPFC_CGN_FPIN_WARN | LPFC_CGN_FPIN_ALARM;
3827         phba->cgn_reg_signal = EDC_CG_SIG_NOTSUPPORTED;
3828         if (rsp_sig_cap == EDC_CG_SIG_WARN_ONLY &&
3829             (drv_sig_cap == EDC_CG_SIG_WARN_ONLY ||
3830              drv_sig_cap == EDC_CG_SIG_WARN_ALARM)) {
3831                 phba->cgn_reg_signal = EDC_CG_SIG_WARN_ONLY;
3832                 phba->cgn_reg_fpin &= ~LPFC_CGN_FPIN_WARN;
3833         }
3834         if (rsp_sig_cap == EDC_CG_SIG_WARN_ALARM) {
3835                 if (drv_sig_cap == EDC_CG_SIG_WARN_ALARM) {
3836                         phba->cgn_reg_signal = EDC_CG_SIG_WARN_ALARM;
3837                         phba->cgn_reg_fpin = LPFC_CGN_FPIN_NONE;
3838                 }
3839                 if (drv_sig_cap == EDC_CG_SIG_WARN_ONLY) {
3840                         phba->cgn_reg_signal = EDC_CG_SIG_WARN_ONLY;
3841                         phba->cgn_reg_fpin &= ~LPFC_CGN_FPIN_WARN;
3842                 }
3843         }
3844
3845         if (!phba->cgn_i)
3846                 return;
3847
3848         /* Update signal frequency in congestion info buffer */
3849         cp = (struct lpfc_cgn_info *)phba->cgn_i->virt;
3850
3851         /* Frequency (in ms) Signal Warning/Signal Congestion Notifications
3852          * are received by the HBA
3853          */
3854         sig_freq = phba->cgn_sig_freq;
3855
3856         if (phba->cgn_reg_signal == EDC_CG_SIG_WARN_ONLY)
3857                 cp->cgn_warn_freq = cpu_to_le16(sig_freq);
3858         if (phba->cgn_reg_signal == EDC_CG_SIG_WARN_ALARM) {
3859                 cp->cgn_alarm_freq = cpu_to_le16(sig_freq);
3860                 cp->cgn_warn_freq = cpu_to_le16(sig_freq);
3861         }
3862         crc = lpfc_cgn_calc_crc32(cp, LPFC_CGN_INFO_SZ, LPFC_CGN_CRC32_SEED);
3863         cp->cgn_info_crc = cpu_to_le32(crc);
3864         return;
3865
3866 out_no_support:
3867         phba->cgn_reg_signal = EDC_CG_SIG_NOTSUPPORTED;
3868         phba->cgn_sig_freq = 0;
3869         phba->cgn_reg_fpin = LPFC_CGN_FPIN_ALARM | LPFC_CGN_FPIN_WARN;
3870 }
3871
3872 DECLARE_ENUM2STR_LOOKUP(lpfc_get_tlv_dtag_nm, fc_ls_tlv_dtag,
3873                         FC_LS_TLV_DTAG_INIT);
3874
3875 /**
3876  * lpfc_cmpl_els_edc - Completion callback function for EDC
3877  * @phba: pointer to lpfc hba data structure.
3878  * @cmdiocb: pointer to lpfc command iocb data structure.
3879  * @rspiocb: pointer to lpfc response iocb data structure.
3880  *
3881  * This routine is the completion callback function for issuing the Exchange
3882  * Diagnostic Capabilities (EDC) command. The driver issues an EDC to
3883  * notify the FPort of its Congestion and Link Fault capabilities.  This
3884  * routine parses the FPort's response and decides on the least common
3885  * values applicable to both FPort and NPort for Warnings and Alarms that
3886  * are communicated via hardware signals.
3887  **/
3888 static void
3889 lpfc_cmpl_els_edc(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
3890                   struct lpfc_iocbq *rspiocb)
3891 {
3892         IOCB_t *irsp;
3893         struct fc_els_edc_resp *edc_rsp;
3894         struct fc_tlv_desc *tlv;
3895         struct fc_diag_cg_sig_desc *pcgd;
3896         struct fc_diag_lnkflt_desc *plnkflt;
3897         struct lpfc_dmabuf *pcmd, *prsp;
3898         const char *dtag_nm;
3899         u32 *pdata, dtag;
3900         int desc_cnt = 0, bytes_remain;
3901         bool rcv_cap_desc = false;
3902         struct lpfc_nodelist *ndlp;
3903
3904         irsp = &rspiocb->iocb;
3905         ndlp = cmdiocb->context1;
3906
3907         lpfc_debugfs_disc_trc(phba->pport, LPFC_DISC_TRC_ELS_CMD,
3908                               "EDC cmpl:    status:x%x/x%x did:x%x",
3909                               irsp->ulpStatus, irsp->un.ulpWord[4],
3910                               irsp->un.elsreq64.remoteID);
3911
3912         /* ELS cmd tag <ulpIoTag> completes */
3913         lpfc_printf_log(phba, KERN_INFO, LOG_ELS | LOG_CGN_MGMT,
3914                         "4201 EDC cmd tag x%x completes Data: x%x x%x x%x\n",
3915                         irsp->ulpIoTag, irsp->ulpStatus,
3916                         irsp->un.ulpWord[4], irsp->ulpTimeout);
3917
3918         pcmd = (struct lpfc_dmabuf *)cmdiocb->context2;
3919         if (!pcmd)
3920                 goto out;
3921
3922         pdata = (u32 *)pcmd->virt;
3923         if (!pdata)
3924                 goto out;
3925
3926         /* Need to clear signal values, send features MB and RDF with FPIN. */
3927         if (irsp->ulpStatus)
3928                 goto out;
3929
3930         prsp = list_get_first(&pcmd->list, struct lpfc_dmabuf, list);
3931         if (!prsp)
3932                 goto out;
3933
3934         edc_rsp = prsp->virt;
3935         if (!edc_rsp)
3936                 goto out;
3937
3938         /* ELS cmd tag <ulpIoTag> completes */
3939         lpfc_printf_log(phba, KERN_INFO, LOG_ELS | LOG_CGN_MGMT,
3940                         "4676 Fabric EDC Rsp: "
3941                         "0x%02x, 0x%08x\n",
3942                         edc_rsp->acc_hdr.la_cmd,
3943                         be32_to_cpu(edc_rsp->desc_list_len));
3944
3945         /*
3946          * Payload length in bytes is the response descriptor list
3947          * length minus the 12 bytes of Link Service Request
3948          * Information descriptor in the reply.
3949          */
3950         bytes_remain = be32_to_cpu(edc_rsp->desc_list_len) -
3951                                    sizeof(struct fc_els_lsri_desc);
3952         if (bytes_remain <= 0)
3953                 goto out;
3954
3955         tlv = edc_rsp->desc;
3956
3957         /*
3958          * cycle through EDC diagnostic descriptors to find the
3959          * congestion signaling capability descriptor
3960          */
3961         while (bytes_remain) {
3962                 if (bytes_remain < FC_TLV_DESC_HDR_SZ) {
3963                         lpfc_printf_log(phba, KERN_WARNING, LOG_CGN_MGMT,
3964                                         "6461 Truncated TLV hdr on "
3965                                         "Diagnostic descriptor[%d]\n",
3966                                         desc_cnt);
3967                         goto out;
3968                 }
3969
3970                 dtag = be32_to_cpu(tlv->desc_tag);
3971                 switch (dtag) {
3972                 case ELS_DTAG_LNK_FAULT_CAP:
3973                         if (bytes_remain < FC_TLV_DESC_SZ_FROM_LENGTH(tlv) ||
3974                             FC_TLV_DESC_SZ_FROM_LENGTH(tlv) !=
3975                                         sizeof(struct fc_diag_lnkflt_desc)) {
3976                                 lpfc_printf_log(
3977                                         phba, KERN_WARNING, LOG_CGN_MGMT,
3978                                         "6462 Truncated Link Fault Diagnostic "
3979                                         "descriptor[%d]: %d vs 0x%zx 0x%zx\n",
3980                                         desc_cnt, bytes_remain,
3981                                         FC_TLV_DESC_SZ_FROM_LENGTH(tlv),
3982                                         sizeof(struct fc_diag_cg_sig_desc));
3983                                 goto out;
3984                         }
3985                         plnkflt = (struct fc_diag_lnkflt_desc *)tlv;
3986                         lpfc_printf_log(
3987                                 phba, KERN_INFO, LOG_ELS | LOG_CGN_MGMT,
3988                                 "4617 Link Fault Desc Data: 0x%08x 0x%08x "
3989                                 "0x%08x 0x%08x 0x%08x\n",
3990                                 be32_to_cpu(plnkflt->desc_tag),
3991                                 be32_to_cpu(plnkflt->desc_len),
3992                                 be32_to_cpu(
3993                                         plnkflt->degrade_activate_threshold),
3994                                 be32_to_cpu(
3995                                         plnkflt->degrade_deactivate_threshold),
3996                                 be32_to_cpu(plnkflt->fec_degrade_interval));
3997                         break;
3998                 case ELS_DTAG_CG_SIGNAL_CAP:
3999                         if (bytes_remain < FC_TLV_DESC_SZ_FROM_LENGTH(tlv) ||
4000                             FC_TLV_DESC_SZ_FROM_LENGTH(tlv) !=
4001                                         sizeof(struct fc_diag_cg_sig_desc)) {
4002                                 lpfc_printf_log(
4003                                         phba, KERN_WARNING, LOG_CGN_MGMT,
4004                                         "6463 Truncated Cgn Signal Diagnostic "
4005                                         "descriptor[%d]: %d vs 0x%zx 0x%zx\n",
4006                                         desc_cnt, bytes_remain,
4007                                         FC_TLV_DESC_SZ_FROM_LENGTH(tlv),
4008                                         sizeof(struct fc_diag_cg_sig_desc));
4009                                 goto out;
4010                         }
4011
4012                         pcgd = (struct fc_diag_cg_sig_desc *)tlv;
4013                         lpfc_printf_log(
4014                                 phba, KERN_INFO, LOG_ELS | LOG_CGN_MGMT,
4015                                 "4616 CGN Desc Data: 0x%08x 0x%08x "
4016                                 "0x%08x 0x%04x 0x%04x 0x%08x 0x%04x 0x%04x\n",
4017                                 be32_to_cpu(pcgd->desc_tag),
4018                                 be32_to_cpu(pcgd->desc_len),
4019                                 be32_to_cpu(pcgd->xmt_signal_capability),
4020                                 be16_to_cpu(pcgd->xmt_signal_frequency.count),
4021                                 be16_to_cpu(pcgd->xmt_signal_frequency.units),
4022                                 be32_to_cpu(pcgd->rcv_signal_capability),
4023                                 be16_to_cpu(pcgd->rcv_signal_frequency.count),
4024                                 be16_to_cpu(pcgd->rcv_signal_frequency.units));
4025
4026                         /* Compare driver and Fport capabilities and choose
4027                          * least common.
4028                          */
4029                         lpfc_least_capable_settings(phba, pcgd);
4030                         rcv_cap_desc = true;
4031                         break;
4032                 default:
4033                         dtag_nm = lpfc_get_tlv_dtag_nm(dtag);
4034                         lpfc_printf_log(phba, KERN_WARNING, LOG_CGN_MGMT,
4035                                         "4919 unknown Diagnostic "
4036                                         "Descriptor[%d]: tag x%x (%s)\n",
4037                                         desc_cnt, dtag, dtag_nm);
4038                 }
4039
4040                 bytes_remain -= FC_TLV_DESC_SZ_FROM_LENGTH(tlv);
4041                 tlv = fc_tlv_next_desc(tlv);
4042                 desc_cnt++;
4043         }
4044
4045 out:
4046         if (!rcv_cap_desc) {
4047                 phba->cgn_reg_fpin = LPFC_CGN_FPIN_ALARM | LPFC_CGN_FPIN_WARN;
4048                 phba->cgn_reg_signal = EDC_CG_SIG_NOTSUPPORTED;
4049                 phba->cgn_sig_freq = 0;
4050                 lpfc_printf_log(phba, KERN_WARNING, LOG_ELS | LOG_CGN_MGMT,
4051                                 "4202 EDC rsp error - sending RDF "
4052                                 "for FPIN only.\n");
4053         }
4054
4055         lpfc_config_cgn_signal(phba);
4056
4057         /* Check to see if link went down during discovery */
4058         lpfc_els_chk_latt(phba->pport);
4059         lpfc_debugfs_disc_trc(phba->pport, LPFC_DISC_TRC_ELS_CMD,
4060                               "EDC Cmpl:     did:x%x refcnt %d",
4061                               ndlp->nlp_DID, kref_read(&ndlp->kref), 0);
4062         lpfc_els_free_iocb(phba, cmdiocb);
4063         lpfc_nlp_put(ndlp);
4064 }
4065
4066 static void
4067 lpfc_format_edc_cgn_desc(struct lpfc_hba *phba, struct fc_diag_cg_sig_desc *cgd)
4068 {
4069         /* We are assuming cgd was zero'ed before calling this routine */
4070
4071         /* Configure the congestion detection capability */
4072         cgd->desc_tag = cpu_to_be32(ELS_DTAG_CG_SIGNAL_CAP);
4073
4074         /* Descriptor len doesn't include the tag or len fields. */
4075         cgd->desc_len = cpu_to_be32(
4076                 FC_TLV_DESC_LENGTH_FROM_SZ(struct fc_diag_cg_sig_desc));
4077
4078         /* xmt_signal_capability already set to EDC_CG_SIG_NOTSUPPORTED.
4079          * xmt_signal_frequency.count already set to 0.
4080          * xmt_signal_frequency.units already set to 0.
4081          */
4082
4083         if (phba->cmf_active_mode == LPFC_CFG_OFF) {
4084                 /* rcv_signal_capability already set to EDC_CG_SIG_NOTSUPPORTED.
4085                  * rcv_signal_frequency.count already set to 0.
4086                  * rcv_signal_frequency.units already set to 0.
4087                  */
4088                 phba->cgn_sig_freq = 0;
4089                 return;
4090         }
4091         switch (phba->cgn_reg_signal) {
4092         case EDC_CG_SIG_WARN_ONLY:
4093                 cgd->rcv_signal_capability = cpu_to_be32(EDC_CG_SIG_WARN_ONLY);
4094                 break;
4095         case EDC_CG_SIG_WARN_ALARM:
4096                 cgd->rcv_signal_capability = cpu_to_be32(EDC_CG_SIG_WARN_ALARM);
4097                 break;
4098         default:
4099                 /* rcv_signal_capability left 0 thus no support */
4100                 break;
4101         }
4102
4103         /* We start negotiation with lpfc_fabric_cgn_frequency, after
4104          * the completion we settle on the higher frequency.
4105          */
4106         cgd->rcv_signal_frequency.count =
4107                 cpu_to_be16(lpfc_fabric_cgn_frequency);
4108         cgd->rcv_signal_frequency.units =
4109                 cpu_to_be16(EDC_CG_SIGFREQ_MSEC);
4110 }
4111
4112  /**
4113   * lpfc_issue_els_edc - Exchange Diagnostic Capabilities with the fabric.
4114   * @vport: pointer to a host virtual N_Port data structure.
4115   * @retry: retry counter for the command iocb.
4116   *
4117   * This routine issues an ELS EDC to the F-Port Controller to communicate
4118   * this N_Port's support of hardware signals in its Congestion
4119   * Capabilities Descriptor.
4120   *
4121   * Note: This routine does not check if one or more signals are
4122   * set in the cgn_reg_signal parameter.  The caller makes the
4123   * decision to enforce cgn_reg_signal as nonzero or zero depending
4124   * on the conditions.  During Fabric requests, the driver
4125   * requires cgn_reg_signals to be nonzero.  But a dynamic request
4126   * to set the congestion mode to OFF from Monitor or Manage
4127   * would correctly issue an EDC with no signals enabled to
4128   * turn off switch functionality and then update the FW.
4129   *
4130   * Return code
4131   *   0 - Successfully issued edc command
4132   *   1 - Failed to issue edc command
4133   **/
4134 int
4135 lpfc_issue_els_edc(struct lpfc_vport *vport, uint8_t retry)
4136 {
4137         struct lpfc_hba  *phba = vport->phba;
4138         struct lpfc_iocbq *elsiocb;
4139         struct lpfc_els_edc_req *edc_req;
4140         struct fc_diag_cg_sig_desc *cgn_desc;
4141         u16 cmdsize;
4142         struct lpfc_nodelist *ndlp;
4143         u8 *pcmd = NULL;
4144         u32 edc_req_size, cgn_desc_size;
4145         int rc;
4146
4147         if (vport->port_type == LPFC_NPIV_PORT)
4148                 return -EACCES;
4149
4150         ndlp = lpfc_findnode_did(vport, Fabric_DID);
4151         if (!ndlp || ndlp->nlp_state != NLP_STE_UNMAPPED_NODE)
4152                 return -ENODEV;
4153
4154         /* If HBA doesn't support signals, drop into RDF */
4155         if (!phba->cgn_init_reg_signal)
4156                 goto try_rdf;
4157
4158         edc_req_size = sizeof(struct fc_els_edc);
4159         cgn_desc_size = sizeof(struct fc_diag_cg_sig_desc);
4160         cmdsize = edc_req_size + cgn_desc_size;
4161         elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, retry, ndlp,
4162                                      ndlp->nlp_DID, ELS_CMD_EDC);
4163         if (!elsiocb)
4164                 goto try_rdf;
4165
4166         /* Configure the payload for the supported Diagnostics capabilities. */
4167         pcmd = (u8 *)(((struct lpfc_dmabuf *)elsiocb->context2)->virt);
4168         memset(pcmd, 0, cmdsize);
4169         edc_req = (struct lpfc_els_edc_req *)pcmd;
4170         edc_req->edc.desc_len = cpu_to_be32(cgn_desc_size);
4171         edc_req->edc.edc_cmd = ELS_EDC;
4172
4173         cgn_desc = &edc_req->cgn_desc;
4174
4175         lpfc_format_edc_cgn_desc(phba, cgn_desc);
4176
4177         phba->cgn_sig_freq = lpfc_fabric_cgn_frequency;
4178
4179         lpfc_printf_vlog(vport, KERN_INFO, LOG_CGN_MGMT,
4180                          "4623 Xmit EDC to remote "
4181                          "NPORT x%x reg_sig x%x reg_fpin:x%x\n",
4182                          ndlp->nlp_DID, phba->cgn_reg_signal,
4183                          phba->cgn_reg_fpin);
4184
4185         elsiocb->iocb_cmpl = lpfc_cmpl_els_disc_cmd;
4186         elsiocb->context1 = lpfc_nlp_get(ndlp);
4187         if (!elsiocb->context1) {
4188                 lpfc_els_free_iocb(phba, elsiocb);
4189                 return -EIO;
4190         }
4191
4192         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
4193                               "Issue EDC:     did:x%x refcnt %d",
4194                               ndlp->nlp_DID, kref_read(&ndlp->kref), 0);
4195         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
4196         if (rc == IOCB_ERROR) {
4197                 /* The additional lpfc_nlp_put will cause the following
4198                  * lpfc_els_free_iocb routine to trigger the rlease of
4199                  * the node.
4200                  */
4201                 lpfc_els_free_iocb(phba, elsiocb);
4202                 lpfc_nlp_put(ndlp);
4203                 goto try_rdf;
4204         }
4205         return 0;
4206 try_rdf:
4207         phba->cgn_reg_fpin = LPFC_CGN_FPIN_WARN | LPFC_CGN_FPIN_ALARM;
4208         phba->cgn_reg_signal = EDC_CG_SIG_NOTSUPPORTED;
4209         rc = lpfc_issue_els_rdf(vport, 0);
4210         return rc;
4211 }
4212
4213 /**
4214  * lpfc_cancel_retry_delay_tmo - Cancel the timer with delayed iocb-cmd retry
4215  * @vport: pointer to a host virtual N_Port data structure.
4216  * @nlp: pointer to a node-list data structure.
4217  *
4218  * This routine cancels the timer with a delayed IOCB-command retry for
4219  * a @vport's @ndlp. It stops the timer for the delayed function retrial and
4220  * removes the ELS retry event if it presents. In addition, if the
4221  * NLP_NPR_2B_DISC bit is set in the @nlp's nlp_flag bitmap, ADISC IOCB
4222  * commands are sent for the @vport's nodes that require issuing discovery
4223  * ADISC.
4224  **/
4225 void
4226 lpfc_cancel_retry_delay_tmo(struct lpfc_vport *vport, struct lpfc_nodelist *nlp)
4227 {
4228         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
4229         struct lpfc_work_evt *evtp;
4230
4231         if (!(nlp->nlp_flag & NLP_DELAY_TMO))
4232                 return;
4233         spin_lock_irq(&nlp->lock);
4234         nlp->nlp_flag &= ~NLP_DELAY_TMO;
4235         spin_unlock_irq(&nlp->lock);
4236         del_timer_sync(&nlp->nlp_delayfunc);
4237         nlp->nlp_last_elscmd = 0;
4238         if (!list_empty(&nlp->els_retry_evt.evt_listp)) {
4239                 list_del_init(&nlp->els_retry_evt.evt_listp);
4240                 /* Decrement nlp reference count held for the delayed retry */
4241                 evtp = &nlp->els_retry_evt;
4242                 lpfc_nlp_put((struct lpfc_nodelist *)evtp->evt_arg1);
4243         }
4244         if (nlp->nlp_flag & NLP_NPR_2B_DISC) {
4245                 spin_lock_irq(&nlp->lock);
4246                 nlp->nlp_flag &= ~NLP_NPR_2B_DISC;
4247                 spin_unlock_irq(&nlp->lock);
4248                 if (vport->num_disc_nodes) {
4249                         if (vport->port_state < LPFC_VPORT_READY) {
4250                                 /* Check if there are more ADISCs to be sent */
4251                                 lpfc_more_adisc(vport);
4252                         } else {
4253                                 /* Check if there are more PLOGIs to be sent */
4254                                 lpfc_more_plogi(vport);
4255                                 if (vport->num_disc_nodes == 0) {
4256                                         spin_lock_irq(shost->host_lock);
4257                                         vport->fc_flag &= ~FC_NDISC_ACTIVE;
4258                                         spin_unlock_irq(shost->host_lock);
4259                                         lpfc_can_disctmo(vport);
4260                                         lpfc_end_rscn(vport);
4261                                 }
4262                         }
4263                 }
4264         }
4265         return;
4266 }
4267
4268 /**
4269  * lpfc_els_retry_delay - Timer function with a ndlp delayed function timer
4270  * @t: pointer to the timer function associated data (ndlp).
4271  *
4272  * This routine is invoked by the ndlp delayed-function timer to check
4273  * whether there is any pending ELS retry event(s) with the node. If not, it
4274  * simply returns. Otherwise, if there is at least one ELS delayed event, it
4275  * adds the delayed events to the HBA work list and invokes the
4276  * lpfc_worker_wake_up() routine to wake up worker thread to process the
4277  * event. Note that lpfc_nlp_get() is called before posting the event to
4278  * the work list to hold reference count of ndlp so that it guarantees the
4279  * reference to ndlp will still be available when the worker thread gets
4280  * to the event associated with the ndlp.
4281  **/
4282 void
4283 lpfc_els_retry_delay(struct timer_list *t)
4284 {
4285         struct lpfc_nodelist *ndlp = from_timer(ndlp, t, nlp_delayfunc);
4286         struct lpfc_vport *vport = ndlp->vport;
4287         struct lpfc_hba   *phba = vport->phba;
4288         unsigned long flags;
4289         struct lpfc_work_evt  *evtp = &ndlp->els_retry_evt;
4290
4291         spin_lock_irqsave(&phba->hbalock, flags);
4292         if (!list_empty(&evtp->evt_listp)) {
4293                 spin_unlock_irqrestore(&phba->hbalock, flags);
4294                 return;
4295         }
4296
4297         /* We need to hold the node by incrementing the reference
4298          * count until the queued work is done
4299          */
4300         evtp->evt_arg1  = lpfc_nlp_get(ndlp);
4301         if (evtp->evt_arg1) {
4302                 evtp->evt = LPFC_EVT_ELS_RETRY;
4303                 list_add_tail(&evtp->evt_listp, &phba->work_list);
4304                 lpfc_worker_wake_up(phba);
4305         }
4306         spin_unlock_irqrestore(&phba->hbalock, flags);
4307         return;
4308 }
4309
4310 /**
4311  * lpfc_els_retry_delay_handler - Work thread handler for ndlp delayed function
4312  * @ndlp: pointer to a node-list data structure.
4313  *
4314  * This routine is the worker-thread handler for processing the @ndlp delayed
4315  * event(s), posted by the lpfc_els_retry_delay() routine. It simply retrieves
4316  * the last ELS command from the associated ndlp and invokes the proper ELS
4317  * function according to the delayed ELS command to retry the command.
4318  **/
4319 void
4320 lpfc_els_retry_delay_handler(struct lpfc_nodelist *ndlp)
4321 {
4322         struct lpfc_vport *vport = ndlp->vport;
4323         uint32_t cmd, retry;
4324
4325         spin_lock_irq(&ndlp->lock);
4326         cmd = ndlp->nlp_last_elscmd;
4327         ndlp->nlp_last_elscmd = 0;
4328
4329         if (!(ndlp->nlp_flag & NLP_DELAY_TMO)) {
4330                 spin_unlock_irq(&ndlp->lock);
4331                 return;
4332         }
4333
4334         ndlp->nlp_flag &= ~NLP_DELAY_TMO;
4335         spin_unlock_irq(&ndlp->lock);
4336         /*
4337          * If a discovery event readded nlp_delayfunc after timer
4338          * firing and before processing the timer, cancel the
4339          * nlp_delayfunc.
4340          */
4341         del_timer_sync(&ndlp->nlp_delayfunc);
4342         retry = ndlp->nlp_retry;
4343         ndlp->nlp_retry = 0;
4344
4345         switch (cmd) {
4346         case ELS_CMD_FLOGI:
4347                 lpfc_issue_els_flogi(vport, ndlp, retry);
4348                 break;
4349         case ELS_CMD_PLOGI:
4350                 if (!lpfc_issue_els_plogi(vport, ndlp->nlp_DID, retry)) {
4351                         ndlp->nlp_prev_state = ndlp->nlp_state;
4352                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
4353                 }
4354                 break;
4355         case ELS_CMD_ADISC:
4356                 if (!lpfc_issue_els_adisc(vport, ndlp, retry)) {
4357                         ndlp->nlp_prev_state = ndlp->nlp_state;
4358                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_ADISC_ISSUE);
4359                 }
4360                 break;
4361         case ELS_CMD_PRLI:
4362         case ELS_CMD_NVMEPRLI:
4363                 if (!lpfc_issue_els_prli(vport, ndlp, retry)) {
4364                         ndlp->nlp_prev_state = ndlp->nlp_state;
4365                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_PRLI_ISSUE);
4366                 }
4367                 break;
4368         case ELS_CMD_LOGO:
4369                 if (!lpfc_issue_els_logo(vport, ndlp, retry)) {
4370                         ndlp->nlp_prev_state = ndlp->nlp_state;
4371                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_LOGO_ISSUE);
4372                 }
4373                 break;
4374         case ELS_CMD_FDISC:
4375                 if (!(vport->fc_flag & FC_VPORT_NEEDS_INIT_VPI))
4376                         lpfc_issue_els_fdisc(vport, ndlp, retry);
4377                 break;
4378         }
4379         return;
4380 }
4381
4382 /**
4383  * lpfc_link_reset - Issue link reset
4384  * @vport: pointer to a virtual N_Port data structure.
4385  *
4386  * This routine performs link reset by sending INIT_LINK mailbox command.
4387  * For SLI-3 adapter, link attention interrupt is enabled before issuing
4388  * INIT_LINK mailbox command.
4389  *
4390  * Return code
4391  *   0 - Link reset initiated successfully
4392  *   1 - Failed to initiate link reset
4393  **/
4394 int
4395 lpfc_link_reset(struct lpfc_vport *vport)
4396 {
4397         struct lpfc_hba *phba = vport->phba;
4398         LPFC_MBOXQ_t *mbox;
4399         uint32_t control;
4400         int rc;
4401
4402         lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
4403                          "2851 Attempt link reset\n");
4404         mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
4405         if (!mbox) {
4406                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
4407                                 "2852 Failed to allocate mbox memory");
4408                 return 1;
4409         }
4410
4411         /* Enable Link attention interrupts */
4412         if (phba->sli_rev <= LPFC_SLI_REV3) {
4413                 spin_lock_irq(&phba->hbalock);
4414                 phba->sli.sli_flag |= LPFC_PROCESS_LA;
4415                 control = readl(phba->HCregaddr);
4416                 control |= HC_LAINT_ENA;
4417                 writel(control, phba->HCregaddr);
4418                 readl(phba->HCregaddr); /* flush */
4419                 spin_unlock_irq(&phba->hbalock);
4420         }
4421
4422         lpfc_init_link(phba, mbox, phba->cfg_topology,
4423                        phba->cfg_link_speed);
4424         mbox->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
4425         mbox->vport = vport;
4426         rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
4427         if ((rc != MBX_BUSY) && (rc != MBX_SUCCESS)) {
4428                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
4429                                 "2853 Failed to issue INIT_LINK "
4430                                 "mbox command, rc:x%x\n", rc);
4431                 mempool_free(mbox, phba->mbox_mem_pool);
4432                 return 1;
4433         }
4434
4435         return 0;
4436 }
4437
4438 /**
4439  * lpfc_els_retry - Make retry decision on an els command iocb
4440  * @phba: pointer to lpfc hba data structure.
4441  * @cmdiocb: pointer to lpfc command iocb data structure.
4442  * @rspiocb: pointer to lpfc response iocb data structure.
4443  *
4444  * This routine makes a retry decision on an ELS command IOCB, which has
4445  * failed. The following ELS IOCBs use this function for retrying the command
4446  * when previously issued command responsed with error status: FLOGI, PLOGI,
4447  * PRLI, ADISC and FDISC. Based on the ELS command type and the
4448  * returned error status, it makes the decision whether a retry shall be
4449  * issued for the command, and whether a retry shall be made immediately or
4450  * delayed. In the former case, the corresponding ELS command issuing-function
4451  * is called to retry the command. In the later case, the ELS command shall
4452  * be posted to the ndlp delayed event and delayed function timer set to the
4453  * ndlp for the delayed command issusing.
4454  *
4455  * Return code
4456  *   0 - No retry of els command is made
4457  *   1 - Immediate or delayed retry of els command is made
4458  **/
4459 static int
4460 lpfc_els_retry(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
4461                struct lpfc_iocbq *rspiocb)
4462 {
4463         struct lpfc_vport *vport = cmdiocb->vport;
4464         IOCB_t *irsp = &rspiocb->iocb;
4465         struct lpfc_nodelist *ndlp = (struct lpfc_nodelist *) cmdiocb->context1;
4466         struct lpfc_dmabuf *pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
4467         uint32_t *elscmd;
4468         struct ls_rjt stat;
4469         int retry = 0, maxretry = lpfc_max_els_tries, delay = 0;
4470         int logerr = 0;
4471         uint32_t cmd = 0;
4472         uint32_t did;
4473         int link_reset = 0, rc;
4474
4475
4476         /* Note: context2 may be 0 for internal driver abort
4477          * of delays ELS command.
4478          */
4479
4480         if (pcmd && pcmd->virt) {
4481                 elscmd = (uint32_t *) (pcmd->virt);
4482                 cmd = *elscmd++;
4483         }
4484
4485         if (ndlp)
4486                 did = ndlp->nlp_DID;
4487         else {
4488                 /* We should only hit this case for retrying PLOGI */
4489                 did = irsp->un.elsreq64.remoteID;
4490                 ndlp = lpfc_findnode_did(vport, did);
4491                 if (!ndlp && (cmd != ELS_CMD_PLOGI))
4492                         return 0;
4493         }
4494
4495         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
4496                 "Retry ELS:       wd7:x%x wd4:x%x did:x%x",
4497                 *(((uint32_t *)irsp) + 7), irsp->un.ulpWord[4], did);
4498
4499         switch (irsp->ulpStatus) {
4500         case IOSTAT_FCP_RSP_ERROR:
4501                 break;
4502         case IOSTAT_REMOTE_STOP:
4503                 if (phba->sli_rev == LPFC_SLI_REV4) {
4504                         /* This IO was aborted by the target, we don't
4505                          * know the rxid and because we did not send the
4506                          * ABTS we cannot generate and RRQ.
4507                          */
4508                         lpfc_set_rrq_active(phba, ndlp,
4509                                          cmdiocb->sli4_lxritag, 0, 0);
4510                 }
4511                 break;
4512         case IOSTAT_LOCAL_REJECT:
4513                 switch ((irsp->un.ulpWord[4] & IOERR_PARAM_MASK)) {
4514                 case IOERR_LOOP_OPEN_FAILURE:
4515                         if (cmd == ELS_CMD_FLOGI) {
4516                                 if (PCI_DEVICE_ID_HORNET ==
4517                                         phba->pcidev->device) {
4518                                         phba->fc_topology = LPFC_TOPOLOGY_LOOP;
4519                                         phba->pport->fc_myDID = 0;
4520                                         phba->alpa_map[0] = 0;
4521                                         phba->alpa_map[1] = 0;
4522                                 }
4523                         }
4524                         if (cmd == ELS_CMD_PLOGI && cmdiocb->retry == 0)
4525                                 delay = 1000;
4526                         retry = 1;
4527                         break;
4528
4529                 case IOERR_ILLEGAL_COMMAND:
4530                         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
4531                                          "0124 Retry illegal cmd x%x "
4532                                          "retry:x%x delay:x%x\n",
4533                                          cmd, cmdiocb->retry, delay);
4534                         retry = 1;
4535                         /* All command's retry policy */
4536                         maxretry = 8;
4537                         if (cmdiocb->retry > 2)
4538                                 delay = 1000;
4539                         break;
4540
4541                 case IOERR_NO_RESOURCES:
4542                         logerr = 1; /* HBA out of resources */
4543                         retry = 1;
4544                         if (cmdiocb->retry > 100)
4545                                 delay = 100;
4546                         maxretry = 250;
4547                         break;
4548
4549                 case IOERR_ILLEGAL_FRAME:
4550                         delay = 100;
4551                         retry = 1;
4552                         break;
4553
4554                 case IOERR_INVALID_RPI:
4555                         if (cmd == ELS_CMD_PLOGI &&
4556                             did == NameServer_DID) {
4557                                 /* Continue forever if plogi to */
4558                                 /* the nameserver fails */
4559                                 maxretry = 0;
4560                                 delay = 100;
4561                         }
4562                         retry = 1;
4563                         break;
4564
4565                 case IOERR_SEQUENCE_TIMEOUT:
4566                         if (cmd == ELS_CMD_PLOGI &&
4567                             did == NameServer_DID &&
4568                             (cmdiocb->retry + 1) == maxretry) {
4569                                 /* Reset the Link */
4570                                 link_reset = 1;
4571                                 break;
4572                         }
4573                         retry = 1;
4574                         delay = 100;
4575                         break;
4576                 case IOERR_SLI_ABORTED:
4577                         /* Retry ELS PLOGI command?
4578                          * Possibly the rport just wasn't ready.
4579                          */
4580                         if (cmd == ELS_CMD_PLOGI) {
4581                                 /* No retry if state change */
4582                                 if (ndlp &&
4583                                     ndlp->nlp_state != NLP_STE_PLOGI_ISSUE)
4584                                         goto out_retry;
4585                                 retry = 1;
4586                                 maxretry = 2;
4587                         }
4588                         break;
4589                 }
4590                 break;
4591
4592         case IOSTAT_NPORT_RJT:
4593         case IOSTAT_FABRIC_RJT:
4594                 if (irsp->un.ulpWord[4] & RJT_UNAVAIL_TEMP) {
4595                         retry = 1;
4596                         break;
4597                 }
4598                 break;
4599
4600         case IOSTAT_NPORT_BSY:
4601         case IOSTAT_FABRIC_BSY:
4602                 logerr = 1; /* Fabric / Remote NPort out of resources */
4603                 retry = 1;
4604                 break;
4605
4606         case IOSTAT_LS_RJT:
4607                 stat.un.lsRjtError = be32_to_cpu(irsp->un.ulpWord[4]);
4608                 /* Added for Vendor specifc support
4609                  * Just keep retrying for these Rsn / Exp codes
4610                  */
4611                 if ((vport->fc_flag & FC_PT2PT) &&
4612                     cmd == ELS_CMD_NVMEPRLI) {
4613                         switch (stat.un.b.lsRjtRsnCode) {
4614                         case LSRJT_UNABLE_TPC:
4615                         case LSRJT_INVALID_CMD:
4616                         case LSRJT_LOGICAL_ERR:
4617                         case LSRJT_CMD_UNSUPPORTED:
4618                                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_ELS,
4619                                                  "0168 NVME PRLI LS_RJT "
4620                                                  "reason %x port doesn't "
4621                                                  "support NVME, disabling NVME\n",
4622                                                  stat.un.b.lsRjtRsnCode);
4623                                 retry = 0;
4624                                 vport->fc_flag |= FC_PT2PT_NO_NVME;
4625                                 goto out_retry;
4626                         }
4627                 }
4628                 switch (stat.un.b.lsRjtRsnCode) {
4629                 case LSRJT_UNABLE_TPC:
4630                         /* The driver has a VALID PLOGI but the rport has
4631                          * rejected the PRLI - can't do it now.  Delay
4632                          * for 1 second and try again.
4633                          *
4634                          * However, if explanation is REQ_UNSUPPORTED there's
4635                          * no point to retry PRLI.
4636                          */
4637                         if ((cmd == ELS_CMD_PRLI || cmd == ELS_CMD_NVMEPRLI) &&
4638                             stat.un.b.lsRjtRsnCodeExp !=
4639                             LSEXP_REQ_UNSUPPORTED) {
4640                                 delay = 1000;
4641                                 maxretry = lpfc_max_els_tries + 1;
4642                                 retry = 1;
4643                                 break;
4644                         }
4645
4646                         /* Legacy bug fix code for targets with PLOGI delays. */
4647                         if (stat.un.b.lsRjtRsnCodeExp ==
4648                             LSEXP_CMD_IN_PROGRESS) {
4649                                 if (cmd == ELS_CMD_PLOGI) {
4650                                         delay = 1000;
4651                                         maxretry = 48;
4652                                 }
4653                                 retry = 1;
4654                                 break;
4655                         }
4656                         if (stat.un.b.lsRjtRsnCodeExp ==
4657                             LSEXP_CANT_GIVE_DATA) {
4658                                 if (cmd == ELS_CMD_PLOGI) {
4659                                         delay = 1000;
4660                                         maxretry = 48;
4661                                 }
4662                                 retry = 1;
4663                                 break;
4664                         }
4665                         if (cmd == ELS_CMD_PLOGI) {
4666                                 delay = 1000;
4667                                 maxretry = lpfc_max_els_tries + 1;
4668                                 retry = 1;
4669                                 break;
4670                         }
4671                         if ((phba->sli3_options & LPFC_SLI3_NPIV_ENABLED) &&
4672                           (cmd == ELS_CMD_FDISC) &&
4673                           (stat.un.b.lsRjtRsnCodeExp == LSEXP_OUT_OF_RESOURCE)){
4674                                 lpfc_printf_vlog(vport, KERN_ERR,
4675                                                  LOG_TRACE_EVENT,
4676                                                  "0125 FDISC Failed (x%x). "
4677                                                  "Fabric out of resources\n",
4678                                                  stat.un.lsRjtError);
4679                                 lpfc_vport_set_state(vport,
4680                                                      FC_VPORT_NO_FABRIC_RSCS);
4681                         }
4682                         break;
4683
4684                 case LSRJT_LOGICAL_BSY:
4685                         if ((cmd == ELS_CMD_PLOGI) ||
4686                             (cmd == ELS_CMD_PRLI) ||
4687                             (cmd == ELS_CMD_NVMEPRLI)) {
4688                                 delay = 1000;
4689                                 maxretry = 48;
4690                         } else if (cmd == ELS_CMD_FDISC) {
4691                                 /* FDISC retry policy */
4692                                 maxretry = 48;
4693                                 if (cmdiocb->retry >= 32)
4694                                         delay = 1000;
4695                         }
4696                         retry = 1;
4697                         break;
4698
4699                 case LSRJT_LOGICAL_ERR:
4700                         /* There are some cases where switches return this
4701                          * error when they are not ready and should be returning
4702                          * Logical Busy. We should delay every time.
4703                          */
4704                         if (cmd == ELS_CMD_FDISC &&
4705                             stat.un.b.lsRjtRsnCodeExp == LSEXP_PORT_LOGIN_REQ) {
4706                                 maxretry = 3;
4707                                 delay = 1000;
4708                                 retry = 1;
4709                         } else if (cmd == ELS_CMD_FLOGI &&
4710                                    stat.un.b.lsRjtRsnCodeExp ==
4711                                                 LSEXP_NOTHING_MORE) {
4712                                 vport->fc_sparam.cmn.bbRcvSizeMsb &= 0xf;
4713                                 retry = 1;
4714                                 lpfc_printf_vlog(vport, KERN_ERR,
4715                                                  LOG_TRACE_EVENT,
4716                                                  "0820 FLOGI Failed (x%x). "
4717                                                  "BBCredit Not Supported\n",
4718                                                  stat.un.lsRjtError);
4719                         }
4720                         break;
4721
4722                 case LSRJT_PROTOCOL_ERR:
4723                         if ((phba->sli3_options & LPFC_SLI3_NPIV_ENABLED) &&
4724                           (cmd == ELS_CMD_FDISC) &&
4725                           ((stat.un.b.lsRjtRsnCodeExp == LSEXP_INVALID_PNAME) ||
4726                           (stat.un.b.lsRjtRsnCodeExp == LSEXP_INVALID_NPORT_ID))
4727                           ) {
4728                                 lpfc_printf_vlog(vport, KERN_ERR,
4729                                                  LOG_TRACE_EVENT,
4730                                                  "0122 FDISC Failed (x%x). "
4731                                                  "Fabric Detected Bad WWN\n",
4732                                                  stat.un.lsRjtError);
4733                                 lpfc_vport_set_state(vport,
4734                                                      FC_VPORT_FABRIC_REJ_WWN);
4735                         }
4736                         break;
4737                 case LSRJT_VENDOR_UNIQUE:
4738                         if ((stat.un.b.vendorUnique == 0x45) &&
4739                             (cmd == ELS_CMD_FLOGI)) {
4740                                 goto out_retry;
4741                         }
4742                         break;
4743                 case LSRJT_CMD_UNSUPPORTED:
4744                         /* lpfc nvmet returns this type of LS_RJT when it
4745                          * receives an FCP PRLI because lpfc nvmet only
4746                          * support NVME.  ELS request is terminated for FCP4
4747                          * on this rport.
4748                          */
4749                         if (stat.un.b.lsRjtRsnCodeExp ==
4750                             LSEXP_REQ_UNSUPPORTED && cmd == ELS_CMD_PRLI) {
4751                                 spin_lock_irq(&ndlp->lock);
4752                                 ndlp->nlp_flag |= NLP_FCP_PRLI_RJT;
4753                                 spin_unlock_irq(&ndlp->lock);
4754                                 retry = 0;
4755                                 goto out_retry;
4756                         }
4757                         break;
4758                 }
4759                 break;
4760
4761         case IOSTAT_INTERMED_RSP:
4762         case IOSTAT_BA_RJT:
4763                 break;
4764
4765         default:
4766                 break;
4767         }
4768
4769         if (link_reset) {
4770                 rc = lpfc_link_reset(vport);
4771                 if (rc) {
4772                         /* Do not give up. Retry PLOGI one more time and attempt
4773                          * link reset if PLOGI fails again.
4774                          */
4775                         retry = 1;
4776                         delay = 100;
4777                         goto out_retry;
4778                 }
4779                 return 1;
4780         }
4781
4782         if (did == FDMI_DID)
4783                 retry = 1;
4784
4785         if ((cmd == ELS_CMD_FLOGI) &&
4786             (phba->fc_topology != LPFC_TOPOLOGY_LOOP) &&
4787             !lpfc_error_lost_link(irsp)) {
4788                 /* FLOGI retry policy */
4789                 retry = 1;
4790                 /* retry FLOGI forever */
4791                 if (phba->link_flag != LS_LOOPBACK_MODE)
4792                         maxretry = 0;
4793                 else
4794                         maxretry = 2;
4795
4796                 if (cmdiocb->retry >= 100)
4797                         delay = 5000;
4798                 else if (cmdiocb->retry >= 32)
4799                         delay = 1000;
4800         } else if ((cmd == ELS_CMD_FDISC) && !lpfc_error_lost_link(irsp)) {
4801                 /* retry FDISCs every second up to devloss */
4802                 retry = 1;
4803                 maxretry = vport->cfg_devloss_tmo;
4804                 delay = 1000;
4805         }
4806
4807         cmdiocb->retry++;
4808         if (maxretry && (cmdiocb->retry >= maxretry)) {
4809                 phba->fc_stat.elsRetryExceeded++;
4810                 retry = 0;
4811         }
4812
4813         if ((vport->load_flag & FC_UNLOADING) != 0)
4814                 retry = 0;
4815
4816 out_retry:
4817         if (retry) {
4818                 if ((cmd == ELS_CMD_PLOGI) || (cmd == ELS_CMD_FDISC)) {
4819                         /* Stop retrying PLOGI and FDISC if in FCF discovery */
4820                         if (phba->fcf.fcf_flag & FCF_DISCOVERY) {
4821                                 lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
4822                                                  "2849 Stop retry ELS command "
4823                                                  "x%x to remote NPORT x%x, "
4824                                                  "Data: x%x x%x\n", cmd, did,
4825                                                  cmdiocb->retry, delay);
4826                                 return 0;
4827                         }
4828                 }
4829
4830                 /* Retry ELS command <elsCmd> to remote NPORT <did> */
4831                 lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
4832                                  "0107 Retry ELS command x%x to remote "
4833                                  "NPORT x%x Data: x%x x%x\n",
4834                                  cmd, did, cmdiocb->retry, delay);
4835
4836                 if (((cmd == ELS_CMD_PLOGI) || (cmd == ELS_CMD_ADISC)) &&
4837                         ((irsp->ulpStatus != IOSTAT_LOCAL_REJECT) ||
4838                         ((irsp->un.ulpWord[4] & IOERR_PARAM_MASK) !=
4839                         IOERR_NO_RESOURCES))) {
4840                         /* Don't reset timer for no resources */
4841
4842                         /* If discovery / RSCN timer is running, reset it */
4843                         if (timer_pending(&vport->fc_disctmo) ||
4844                             (vport->fc_flag & FC_RSCN_MODE))
4845                                 lpfc_set_disctmo(vport);
4846                 }
4847
4848                 phba->fc_stat.elsXmitRetry++;
4849                 if (ndlp && delay) {
4850                         phba->fc_stat.elsDelayRetry++;
4851                         ndlp->nlp_retry = cmdiocb->retry;
4852
4853                         /* delay is specified in milliseconds */
4854                         mod_timer(&ndlp->nlp_delayfunc,
4855                                 jiffies + msecs_to_jiffies(delay));
4856                         spin_lock_irq(&ndlp->lock);
4857                         ndlp->nlp_flag |= NLP_DELAY_TMO;
4858                         spin_unlock_irq(&ndlp->lock);
4859
4860                         ndlp->nlp_prev_state = ndlp->nlp_state;
4861                         if ((cmd == ELS_CMD_PRLI) ||
4862                             (cmd == ELS_CMD_NVMEPRLI))
4863                                 lpfc_nlp_set_state(vport, ndlp,
4864                                         NLP_STE_PRLI_ISSUE);
4865                         else if (cmd != ELS_CMD_ADISC)
4866                                 lpfc_nlp_set_state(vport, ndlp,
4867                                         NLP_STE_NPR_NODE);
4868                         ndlp->nlp_last_elscmd = cmd;
4869
4870                         return 1;
4871                 }
4872                 switch (cmd) {
4873                 case ELS_CMD_FLOGI:
4874                         lpfc_issue_els_flogi(vport, ndlp, cmdiocb->retry);
4875                         return 1;
4876                 case ELS_CMD_FDISC:
4877                         lpfc_issue_els_fdisc(vport, ndlp, cmdiocb->retry);
4878                         return 1;
4879                 case ELS_CMD_PLOGI:
4880                         if (ndlp) {
4881                                 ndlp->nlp_prev_state = ndlp->nlp_state;
4882                                 lpfc_nlp_set_state(vport, ndlp,
4883                                                    NLP_STE_PLOGI_ISSUE);
4884                         }
4885                         lpfc_issue_els_plogi(vport, did, cmdiocb->retry);
4886                         return 1;
4887                 case ELS_CMD_ADISC:
4888                         ndlp->nlp_prev_state = ndlp->nlp_state;
4889                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_ADISC_ISSUE);
4890                         lpfc_issue_els_adisc(vport, ndlp, cmdiocb->retry);
4891                         return 1;
4892                 case ELS_CMD_PRLI:
4893                 case ELS_CMD_NVMEPRLI:
4894                         ndlp->nlp_prev_state = ndlp->nlp_state;
4895                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_PRLI_ISSUE);
4896                         lpfc_issue_els_prli(vport, ndlp, cmdiocb->retry);
4897                         return 1;
4898                 case ELS_CMD_LOGO:
4899                         ndlp->nlp_prev_state = ndlp->nlp_state;
4900                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_LOGO_ISSUE);
4901                         lpfc_issue_els_logo(vport, ndlp, cmdiocb->retry);
4902                         return 1;
4903                 }
4904         }
4905         /* No retry ELS command <elsCmd> to remote NPORT <did> */
4906         if (logerr) {
4907                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
4908                          "0137 No retry ELS command x%x to remote "
4909                          "NPORT x%x: Out of Resources: Error:x%x/%x\n",
4910                          cmd, did, irsp->ulpStatus,
4911                          irsp->un.ulpWord[4]);
4912         }
4913         else {
4914                 lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
4915                          "0108 No retry ELS command x%x to remote "
4916                          "NPORT x%x Retried:%d Error:x%x/%x\n",
4917                          cmd, did, cmdiocb->retry, irsp->ulpStatus,
4918                          irsp->un.ulpWord[4]);
4919         }
4920         return 0;
4921 }
4922
4923 /**
4924  * lpfc_els_free_data - Free lpfc dma buffer and data structure with an iocb
4925  * @phba: pointer to lpfc hba data structure.
4926  * @buf_ptr1: pointer to the lpfc DMA buffer data structure.
4927  *
4928  * This routine releases the lpfc DMA (Direct Memory Access) buffer(s)
4929  * associated with a command IOCB back to the lpfc DMA buffer pool. It first
4930  * checks to see whether there is a lpfc DMA buffer associated with the
4931  * response of the command IOCB. If so, it will be released before releasing
4932  * the lpfc DMA buffer associated with the IOCB itself.
4933  *
4934  * Return code
4935  *   0 - Successfully released lpfc DMA buffer (currently, always return 0)
4936  **/
4937 static int
4938 lpfc_els_free_data(struct lpfc_hba *phba, struct lpfc_dmabuf *buf_ptr1)
4939 {
4940         struct lpfc_dmabuf *buf_ptr;
4941
4942         /* Free the response before processing the command. */
4943         if (!list_empty(&buf_ptr1->list)) {
4944                 list_remove_head(&buf_ptr1->list, buf_ptr,
4945                                  struct lpfc_dmabuf,
4946                                  list);
4947                 lpfc_mbuf_free(phba, buf_ptr->virt, buf_ptr->phys);
4948                 kfree(buf_ptr);
4949         }
4950         lpfc_mbuf_free(phba, buf_ptr1->virt, buf_ptr1->phys);
4951         kfree(buf_ptr1);
4952         return 0;
4953 }
4954
4955 /**
4956  * lpfc_els_free_bpl - Free lpfc dma buffer and data structure with bpl
4957  * @phba: pointer to lpfc hba data structure.
4958  * @buf_ptr: pointer to the lpfc dma buffer data structure.
4959  *
4960  * This routine releases the lpfc Direct Memory Access (DMA) buffer
4961  * associated with a Buffer Pointer List (BPL) back to the lpfc DMA buffer
4962  * pool.
4963  *
4964  * Return code
4965  *   0 - Successfully released lpfc DMA buffer (currently, always return 0)
4966  **/
4967 static int
4968 lpfc_els_free_bpl(struct lpfc_hba *phba, struct lpfc_dmabuf *buf_ptr)
4969 {
4970         lpfc_mbuf_free(phba, buf_ptr->virt, buf_ptr->phys);
4971         kfree(buf_ptr);
4972         return 0;
4973 }
4974
4975 /**
4976  * lpfc_els_free_iocb - Free a command iocb and its associated resources
4977  * @phba: pointer to lpfc hba data structure.
4978  * @elsiocb: pointer to lpfc els command iocb data structure.
4979  *
4980  * This routine frees a command IOCB and its associated resources. The
4981  * command IOCB data structure contains the reference to various associated
4982  * resources, these fields must be set to NULL if the associated reference
4983  * not present:
4984  *   context1 - reference to ndlp
4985  *   context2 - reference to cmd
4986  *   context2->next - reference to rsp
4987  *   context3 - reference to bpl
4988  *
4989  * It first properly decrements the reference count held on ndlp for the
4990  * IOCB completion callback function. If LPFC_DELAY_MEM_FREE flag is not
4991  * set, it invokes the lpfc_els_free_data() routine to release the Direct
4992  * Memory Access (DMA) buffers associated with the IOCB. Otherwise, it
4993  * adds the DMA buffer the @phba data structure for the delayed release.
4994  * If reference to the Buffer Pointer List (BPL) is present, the
4995  * lpfc_els_free_bpl() routine is invoked to release the DMA memory
4996  * associated with BPL. Finally, the lpfc_sli_release_iocbq() routine is
4997  * invoked to release the IOCB data structure back to @phba IOCBQ list.
4998  *
4999  * Return code
5000  *   0 - Success (currently, always return 0)
5001  **/
5002 int
5003 lpfc_els_free_iocb(struct lpfc_hba *phba, struct lpfc_iocbq *elsiocb)
5004 {
5005         struct lpfc_dmabuf *buf_ptr, *buf_ptr1;
5006
5007         /* The I/O iocb is complete.  Clear the context1 data. */
5008         elsiocb->context1 = NULL;
5009
5010         /* context2  = cmd,  context2->next = rsp, context3 = bpl */
5011         if (elsiocb->context2) {
5012                 if (elsiocb->iocb_flag & LPFC_DELAY_MEM_FREE) {
5013                         /* Firmware could still be in progress of DMAing
5014                          * payload, so don't free data buffer till after
5015                          * a hbeat.
5016                          */
5017                         elsiocb->iocb_flag &= ~LPFC_DELAY_MEM_FREE;
5018                         buf_ptr = elsiocb->context2;
5019                         elsiocb->context2 = NULL;
5020                         if (buf_ptr) {
5021                                 buf_ptr1 = NULL;
5022                                 spin_lock_irq(&phba->hbalock);
5023                                 if (!list_empty(&buf_ptr->list)) {
5024                                         list_remove_head(&buf_ptr->list,
5025                                                 buf_ptr1, struct lpfc_dmabuf,
5026                                                 list);
5027                                         INIT_LIST_HEAD(&buf_ptr1->list);
5028                                         list_add_tail(&buf_ptr1->list,
5029                                                 &phba->elsbuf);
5030                                         phba->elsbuf_cnt++;
5031                                 }
5032                                 INIT_LIST_HEAD(&buf_ptr->list);
5033                                 list_add_tail(&buf_ptr->list, &phba->elsbuf);
5034                                 phba->elsbuf_cnt++;
5035                                 spin_unlock_irq(&phba->hbalock);
5036                         }
5037                 } else {
5038                         buf_ptr1 = (struct lpfc_dmabuf *) elsiocb->context2;
5039                         lpfc_els_free_data(phba, buf_ptr1);
5040                         elsiocb->context2 = NULL;
5041                 }
5042         }
5043
5044         if (elsiocb->context3) {
5045                 buf_ptr = (struct lpfc_dmabuf *) elsiocb->context3;
5046                 lpfc_els_free_bpl(phba, buf_ptr);
5047                 elsiocb->context3 = NULL;
5048         }
5049         lpfc_sli_release_iocbq(phba, elsiocb);
5050         return 0;
5051 }
5052
5053 /**
5054  * lpfc_cmpl_els_logo_acc - Completion callback function to logo acc response
5055  * @phba: pointer to lpfc hba data structure.
5056  * @cmdiocb: pointer to lpfc command iocb data structure.
5057  * @rspiocb: pointer to lpfc response iocb data structure.
5058  *
5059  * This routine is the completion callback function to the Logout (LOGO)
5060  * Accept (ACC) Response ELS command. This routine is invoked to indicate
5061  * the completion of the LOGO process. It invokes the lpfc_nlp_not_used() to
5062  * release the ndlp if it has the last reference remaining (reference count
5063  * is 1). If succeeded (meaning ndlp released), it sets the IOCB context1
5064  * field to NULL to inform the following lpfc_els_free_iocb() routine no
5065  * ndlp reference count needs to be decremented. Otherwise, the ndlp
5066  * reference use-count shall be decremented by the lpfc_els_free_iocb()
5067  * routine. Finally, the lpfc_els_free_iocb() is invoked to release the
5068  * IOCB data structure.
5069  **/
5070 static void
5071 lpfc_cmpl_els_logo_acc(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
5072                        struct lpfc_iocbq *rspiocb)
5073 {
5074         struct lpfc_nodelist *ndlp = (struct lpfc_nodelist *) cmdiocb->context1;
5075         struct lpfc_vport *vport = cmdiocb->vport;
5076         IOCB_t *irsp;
5077
5078         irsp = &rspiocb->iocb;
5079         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
5080                 "ACC LOGO cmpl:   status:x%x/x%x did:x%x",
5081                 irsp->ulpStatus, irsp->un.ulpWord[4], ndlp->nlp_DID);
5082         /* ACC to LOGO completes to NPort <nlp_DID> */
5083         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
5084                          "0109 ACC to LOGO completes to NPort x%x refcnt %d "
5085                          "Data: x%x x%x x%x\n",
5086                          ndlp->nlp_DID, kref_read(&ndlp->kref), ndlp->nlp_flag,
5087                          ndlp->nlp_state, ndlp->nlp_rpi);
5088
5089         /* This clause allows the LOGO ACC to complete and free resources
5090          * for the Fabric Domain Controller.  It does deliberately skip
5091          * the unreg_rpi and release rpi because some fabrics send RDP
5092          * requests after logging out from the initiator.
5093          */
5094         if (ndlp->nlp_type & NLP_FABRIC &&
5095             ((ndlp->nlp_DID & WELL_KNOWN_DID_MASK) != WELL_KNOWN_DID_MASK))
5096                 goto out;
5097
5098         if (ndlp->nlp_state == NLP_STE_NPR_NODE) {
5099
5100                 /* If PLOGI is being retried, PLOGI completion will cleanup the
5101                  * node. The NLP_NPR_2B_DISC flag needs to be retained to make
5102                  * progress on nodes discovered from last RSCN.
5103                  */
5104                 if ((ndlp->nlp_flag & NLP_DELAY_TMO) &&
5105                     (ndlp->nlp_last_elscmd == ELS_CMD_PLOGI))
5106                         goto out;
5107
5108                 /* NPort Recovery mode or node is just allocated */
5109                 if (!lpfc_nlp_not_used(ndlp)) {
5110                         /* A LOGO is completing and the node is in NPR state.
5111                          * Just unregister the RPI because the node is still
5112                          * required.
5113                          */
5114                         lpfc_unreg_rpi(vport, ndlp);
5115                 } else {
5116                         /* Indicate the node has already released, should
5117                          * not reference to it from within lpfc_els_free_iocb.
5118                          */
5119                         cmdiocb->context1 = NULL;
5120                 }
5121         }
5122  out:
5123         /*
5124          * The driver received a LOGO from the rport and has ACK'd it.
5125          * At this point, the driver is done so release the IOCB
5126          */
5127         lpfc_els_free_iocb(phba, cmdiocb);
5128         lpfc_nlp_put(ndlp);
5129 }
5130
5131 /**
5132  * lpfc_mbx_cmpl_dflt_rpi - Completion callbk func for unreg dflt rpi mbox cmd
5133  * @phba: pointer to lpfc hba data structure.
5134  * @pmb: pointer to the driver internal queue element for mailbox command.
5135  *
5136  * This routine is the completion callback function for unregister default
5137  * RPI (Remote Port Index) mailbox command to the @phba. It simply releases
5138  * the associated lpfc Direct Memory Access (DMA) buffer back to the pool and
5139  * decrements the ndlp reference count held for this completion callback
5140  * function. After that, it invokes the lpfc_nlp_not_used() to check
5141  * whether there is only one reference left on the ndlp. If so, it will
5142  * perform one more decrement and trigger the release of the ndlp.
5143  **/
5144 void
5145 lpfc_mbx_cmpl_dflt_rpi(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
5146 {
5147         struct lpfc_dmabuf *mp = (struct lpfc_dmabuf *)(pmb->ctx_buf);
5148         struct lpfc_nodelist *ndlp = (struct lpfc_nodelist *)pmb->ctx_ndlp;
5149         u32 mbx_flag = pmb->mbox_flag;
5150         u32 mbx_cmd = pmb->u.mb.mbxCommand;
5151
5152         pmb->ctx_buf = NULL;
5153         pmb->ctx_ndlp = NULL;
5154
5155         if (ndlp) {
5156                 lpfc_printf_vlog(ndlp->vport, KERN_INFO, LOG_NODE,
5157                                  "0006 rpi x%x DID:%x flg:%x %d x%px "
5158                                  "mbx_cmd x%x mbx_flag x%x x%px\n",
5159                                  ndlp->nlp_rpi, ndlp->nlp_DID, ndlp->nlp_flag,
5160                                  kref_read(&ndlp->kref), ndlp, mbx_cmd,
5161                                  mbx_flag, pmb);
5162
5163                 /* This ends the default/temporary RPI cleanup logic for this
5164                  * ndlp and the node and rpi needs to be released. Free the rpi
5165                  * first on an UNREG_LOGIN and then release the final
5166                  * references.
5167                  */
5168                 spin_lock_irq(&ndlp->lock);
5169                 ndlp->nlp_flag &= ~NLP_REG_LOGIN_SEND;
5170                 if (mbx_cmd == MBX_UNREG_LOGIN)
5171                         ndlp->nlp_flag &= ~NLP_UNREG_INP;
5172                 spin_unlock_irq(&ndlp->lock);
5173                 lpfc_nlp_put(ndlp);
5174                 lpfc_drop_node(ndlp->vport, ndlp);
5175         }
5176
5177         lpfc_mbuf_free(phba, mp->virt, mp->phys);
5178         kfree(mp);
5179         mempool_free(pmb, phba->mbox_mem_pool);
5180         return;
5181 }
5182
5183 /**
5184  * lpfc_cmpl_els_rsp - Completion callback function for els response iocb cmd
5185  * @phba: pointer to lpfc hba data structure.
5186  * @cmdiocb: pointer to lpfc command iocb data structure.
5187  * @rspiocb: pointer to lpfc response iocb data structure.
5188  *
5189  * This routine is the completion callback function for ELS Response IOCB
5190  * command. In normal case, this callback function just properly sets the
5191  * nlp_flag bitmap in the ndlp data structure, if the mbox command reference
5192  * field in the command IOCB is not NULL, the referred mailbox command will
5193  * be send out, and then invokes the lpfc_els_free_iocb() routine to release
5194  * the IOCB.
5195  **/
5196 static void
5197 lpfc_cmpl_els_rsp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
5198                   struct lpfc_iocbq *rspiocb)
5199 {
5200         struct lpfc_nodelist *ndlp = (struct lpfc_nodelist *) cmdiocb->context1;
5201         struct lpfc_vport *vport = ndlp ? ndlp->vport : NULL;
5202         struct Scsi_Host  *shost = vport ? lpfc_shost_from_vport(vport) : NULL;
5203         IOCB_t  *irsp;
5204         LPFC_MBOXQ_t *mbox = NULL;
5205         struct lpfc_dmabuf *mp = NULL;
5206
5207         irsp = &rspiocb->iocb;
5208
5209         if (!vport) {
5210                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
5211                                 "3177 ELS response failed\n");
5212                 goto out;
5213         }
5214         if (cmdiocb->context_un.mbox)
5215                 mbox = cmdiocb->context_un.mbox;
5216
5217         /* Check to see if link went down during discovery */
5218         if (!ndlp || lpfc_els_chk_latt(vport)) {
5219                 if (mbox) {
5220                         mp = (struct lpfc_dmabuf *)mbox->ctx_buf;
5221                         if (mp) {
5222                                 lpfc_mbuf_free(phba, mp->virt, mp->phys);
5223                                 kfree(mp);
5224                         }
5225                         mempool_free(mbox, phba->mbox_mem_pool);
5226                 }
5227                 goto out;
5228         }
5229
5230         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
5231                 "ELS rsp cmpl:    status:x%x/x%x did:x%x",
5232                 irsp->ulpStatus, irsp->un.ulpWord[4],
5233                 cmdiocb->iocb.un.elsreq64.remoteID);
5234         /* ELS response tag <ulpIoTag> completes */
5235         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
5236                          "0110 ELS response tag x%x completes "
5237                          "Data: x%x x%x x%x x%x x%x x%x x%x x%x x%px\n",
5238                          cmdiocb->iocb.ulpIoTag, rspiocb->iocb.ulpStatus,
5239                          rspiocb->iocb.un.ulpWord[4], rspiocb->iocb.ulpTimeout,
5240                          ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
5241                          ndlp->nlp_rpi, kref_read(&ndlp->kref), mbox);
5242         if (mbox) {
5243                 if ((rspiocb->iocb.ulpStatus == 0) &&
5244                     (ndlp->nlp_flag & NLP_ACC_REGLOGIN)) {
5245                         if (!lpfc_unreg_rpi(vport, ndlp) &&
5246                             (!(vport->fc_flag & FC_PT2PT))) {
5247                                 if (ndlp->nlp_state == NLP_STE_REG_LOGIN_ISSUE) {
5248                                         lpfc_printf_vlog(vport, KERN_INFO,
5249                                                          LOG_DISCOVERY,
5250                                                          "0314 PLOGI recov "
5251                                                          "DID x%x "
5252                                                          "Data: x%x x%x x%x\n",
5253                                                          ndlp->nlp_DID,
5254                                                          ndlp->nlp_state,
5255                                                          ndlp->nlp_rpi,
5256                                                          ndlp->nlp_flag);
5257                                         mp = mbox->ctx_buf;
5258                                         if (mp) {
5259                                                 lpfc_mbuf_free(phba, mp->virt,
5260                                                                mp->phys);
5261                                                 kfree(mp);
5262                                         }
5263                                         mempool_free(mbox, phba->mbox_mem_pool);
5264                                         goto out;
5265                                 }
5266                         }
5267
5268                         /* Increment reference count to ndlp to hold the
5269                          * reference to ndlp for the callback function.
5270                          */
5271                         mbox->ctx_ndlp = lpfc_nlp_get(ndlp);
5272                         if (!mbox->ctx_ndlp)
5273                                 goto out;
5274
5275                         mbox->vport = vport;
5276                         if (ndlp->nlp_flag & NLP_RM_DFLT_RPI) {
5277                                 mbox->mbox_flag |= LPFC_MBX_IMED_UNREG;
5278                                 mbox->mbox_cmpl = lpfc_mbx_cmpl_dflt_rpi;
5279                         }
5280                         else {
5281                                 mbox->mbox_cmpl = lpfc_mbx_cmpl_reg_login;
5282                                 ndlp->nlp_prev_state = ndlp->nlp_state;
5283                                 lpfc_nlp_set_state(vport, ndlp,
5284                                            NLP_STE_REG_LOGIN_ISSUE);
5285                         }
5286
5287                         ndlp->nlp_flag |= NLP_REG_LOGIN_SEND;
5288                         if (lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT)
5289                             != MBX_NOT_FINISHED)
5290                                 goto out;
5291
5292                         /* Decrement the ndlp reference count we
5293                          * set for this failed mailbox command.
5294                          */
5295                         lpfc_nlp_put(ndlp);
5296                         ndlp->nlp_flag &= ~NLP_REG_LOGIN_SEND;
5297
5298                         /* ELS rsp: Cannot issue reg_login for <NPortid> */
5299                         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
5300                                 "0138 ELS rsp: Cannot issue reg_login for x%x "
5301                                 "Data: x%x x%x x%x\n",
5302                                 ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
5303                                 ndlp->nlp_rpi);
5304                 }
5305                 mp = (struct lpfc_dmabuf *)mbox->ctx_buf;
5306                 if (mp) {
5307                         lpfc_mbuf_free(phba, mp->virt, mp->phys);
5308                         kfree(mp);
5309                 }
5310                 mempool_free(mbox, phba->mbox_mem_pool);
5311         }
5312 out:
5313         if (ndlp && shost) {
5314                 spin_lock_irq(&ndlp->lock);
5315                 if (mbox)
5316                         ndlp->nlp_flag &= ~NLP_ACC_REGLOGIN;
5317                 ndlp->nlp_flag &= ~NLP_RM_DFLT_RPI;
5318                 spin_unlock_irq(&ndlp->lock);
5319         }
5320
5321         /* An SLI4 NPIV instance wants to drop the node at this point under
5322          * these conditions and release the RPI.
5323          */
5324         if (phba->sli_rev == LPFC_SLI_REV4 &&
5325             (vport && vport->port_type == LPFC_NPIV_PORT) &&
5326             !(ndlp->fc4_xpt_flags & SCSI_XPT_REGD) &&
5327             ndlp->nlp_flag & NLP_RELEASE_RPI) {
5328                 lpfc_sli4_free_rpi(phba, ndlp->nlp_rpi);
5329                 spin_lock_irq(&ndlp->lock);
5330                 ndlp->nlp_rpi = LPFC_RPI_ALLOC_ERROR;
5331                 ndlp->nlp_flag &= ~NLP_RELEASE_RPI;
5332                 spin_unlock_irq(&ndlp->lock);
5333                 lpfc_drop_node(vport, ndlp);
5334         }
5335
5336         /* Release the originating I/O reference. */
5337         lpfc_els_free_iocb(phba, cmdiocb);
5338         lpfc_nlp_put(ndlp);
5339         return;
5340 }
5341
5342 /**
5343  * lpfc_els_rsp_acc - Prepare and issue an acc response iocb command
5344  * @vport: pointer to a host virtual N_Port data structure.
5345  * @flag: the els command code to be accepted.
5346  * @oldiocb: pointer to the original lpfc command iocb data structure.
5347  * @ndlp: pointer to a node-list data structure.
5348  * @mbox: pointer to the driver internal queue element for mailbox command.
5349  *
5350  * This routine prepares and issues an Accept (ACC) response IOCB
5351  * command. It uses the @flag to properly set up the IOCB field for the
5352  * specific ACC response command to be issued and invokes the
5353  * lpfc_sli_issue_iocb() routine to send out ACC response IOCB. If a
5354  * @mbox pointer is passed in, it will be put into the context_un.mbox
5355  * field of the IOCB for the completion callback function to issue the
5356  * mailbox command to the HBA later when callback is invoked.
5357  *
5358  * Note that the ndlp reference count will be incremented by 1 for holding the
5359  * ndlp and the reference to ndlp will be stored into the context1 field of
5360  * the IOCB for the completion callback function to the corresponding
5361  * response ELS IOCB command.
5362  *
5363  * Return code
5364  *   0 - Successfully issued acc response
5365  *   1 - Failed to issue acc response
5366  **/
5367 int
5368 lpfc_els_rsp_acc(struct lpfc_vport *vport, uint32_t flag,
5369                  struct lpfc_iocbq *oldiocb, struct lpfc_nodelist *ndlp,
5370                  LPFC_MBOXQ_t *mbox)
5371 {
5372         struct lpfc_hba  *phba = vport->phba;
5373         IOCB_t *icmd;
5374         IOCB_t *oldcmd;
5375         struct lpfc_iocbq *elsiocb;
5376         uint8_t *pcmd;
5377         struct serv_parm *sp;
5378         uint16_t cmdsize;
5379         int rc;
5380         ELS_PKT *els_pkt_ptr;
5381         struct fc_els_rdf_resp *rdf_resp;
5382
5383         oldcmd = &oldiocb->iocb;
5384
5385         switch (flag) {
5386         case ELS_CMD_ACC:
5387                 cmdsize = sizeof(uint32_t);
5388                 elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, oldiocb->retry,
5389                                              ndlp, ndlp->nlp_DID, ELS_CMD_ACC);
5390                 if (!elsiocb) {
5391                         spin_lock_irq(&ndlp->lock);
5392                         ndlp->nlp_flag &= ~NLP_LOGO_ACC;
5393                         spin_unlock_irq(&ndlp->lock);
5394                         return 1;
5395                 }
5396
5397                 icmd = &elsiocb->iocb;
5398                 icmd->ulpContext = oldcmd->ulpContext;  /* Xri / rx_id */
5399                 icmd->unsli3.rcvsli3.ox_id = oldcmd->unsli3.rcvsli3.ox_id;
5400                 pcmd = (((struct lpfc_dmabuf *) elsiocb->context2)->virt);
5401                 *((uint32_t *) (pcmd)) = ELS_CMD_ACC;
5402                 pcmd += sizeof(uint32_t);
5403
5404                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
5405                         "Issue ACC:       did:x%x flg:x%x",
5406                         ndlp->nlp_DID, ndlp->nlp_flag, 0);
5407                 break;
5408         case ELS_CMD_FLOGI:
5409         case ELS_CMD_PLOGI:
5410                 cmdsize = (sizeof(struct serv_parm) + sizeof(uint32_t));
5411                 elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, oldiocb->retry,
5412                                              ndlp, ndlp->nlp_DID, ELS_CMD_ACC);
5413                 if (!elsiocb)
5414                         return 1;
5415
5416                 icmd = &elsiocb->iocb;
5417                 icmd->ulpContext = oldcmd->ulpContext;  /* Xri / rx_id */
5418                 icmd->unsli3.rcvsli3.ox_id = oldcmd->unsli3.rcvsli3.ox_id;
5419                 pcmd = (((struct lpfc_dmabuf *) elsiocb->context2)->virt);
5420
5421                 if (mbox)
5422                         elsiocb->context_un.mbox = mbox;
5423
5424                 *((uint32_t *) (pcmd)) = ELS_CMD_ACC;
5425                 pcmd += sizeof(uint32_t);
5426                 sp = (struct serv_parm *)pcmd;
5427
5428                 if (flag == ELS_CMD_FLOGI) {
5429                         /* Copy the received service parameters back */
5430                         memcpy(sp, &phba->fc_fabparam,
5431                                sizeof(struct serv_parm));
5432
5433                         /* Clear the F_Port bit */
5434                         sp->cmn.fPort = 0;
5435
5436                         /* Mark all class service parameters as invalid */
5437                         sp->cls1.classValid = 0;
5438                         sp->cls2.classValid = 0;
5439                         sp->cls3.classValid = 0;
5440                         sp->cls4.classValid = 0;
5441
5442                         /* Copy our worldwide names */
5443                         memcpy(&sp->portName, &vport->fc_sparam.portName,
5444                                sizeof(struct lpfc_name));
5445                         memcpy(&sp->nodeName, &vport->fc_sparam.nodeName,
5446                                sizeof(struct lpfc_name));
5447                 } else {
5448                         memcpy(pcmd, &vport->fc_sparam,
5449                                sizeof(struct serv_parm));
5450
5451                         sp->cmn.valid_vendor_ver_level = 0;
5452                         memset(sp->un.vendorVersion, 0,
5453                                sizeof(sp->un.vendorVersion));
5454                         sp->cmn.bbRcvSizeMsb &= 0xF;
5455
5456                         /* If our firmware supports this feature, convey that
5457                          * info to the target using the vendor specific field.
5458                          */
5459                         if (phba->sli.sli_flag & LPFC_SLI_SUPPRESS_RSP) {
5460                                 sp->cmn.valid_vendor_ver_level = 1;
5461                                 sp->un.vv.vid = cpu_to_be32(LPFC_VV_EMLX_ID);
5462                                 sp->un.vv.flags =
5463                                         cpu_to_be32(LPFC_VV_SUPPRESS_RSP);
5464                         }
5465                 }
5466
5467                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
5468                         "Issue ACC FLOGI/PLOGI: did:x%x flg:x%x",
5469                         ndlp->nlp_DID, ndlp->nlp_flag, 0);
5470                 break;
5471         case ELS_CMD_PRLO:
5472                 cmdsize = sizeof(uint32_t) + sizeof(PRLO);
5473                 elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, oldiocb->retry,
5474                                              ndlp, ndlp->nlp_DID, ELS_CMD_PRLO);
5475                 if (!elsiocb)
5476                         return 1;
5477
5478                 icmd = &elsiocb->iocb;
5479                 icmd->ulpContext = oldcmd->ulpContext;  /* Xri / rx_id */
5480                 icmd->unsli3.rcvsli3.ox_id = oldcmd->unsli3.rcvsli3.ox_id;
5481                 pcmd = (((struct lpfc_dmabuf *) elsiocb->context2)->virt);
5482
5483                 memcpy(pcmd, ((struct lpfc_dmabuf *) oldiocb->context2)->virt,
5484                        sizeof(uint32_t) + sizeof(PRLO));
5485                 *((uint32_t *) (pcmd)) = ELS_CMD_PRLO_ACC;
5486                 els_pkt_ptr = (ELS_PKT *) pcmd;
5487                 els_pkt_ptr->un.prlo.acceptRspCode = PRLO_REQ_EXECUTED;
5488
5489                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
5490                         "Issue ACC PRLO:  did:x%x flg:x%x",
5491                         ndlp->nlp_DID, ndlp->nlp_flag, 0);
5492                 break;
5493         case ELS_CMD_RDF:
5494                 cmdsize = sizeof(*rdf_resp);
5495                 elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, oldiocb->retry,
5496                                              ndlp, ndlp->nlp_DID, ELS_CMD_ACC);
5497                 if (!elsiocb)
5498                         return 1;
5499
5500                 icmd = &elsiocb->iocb;
5501                 icmd->ulpContext = oldcmd->ulpContext;  /* Xri / rx_id */
5502                 icmd->unsli3.rcvsli3.ox_id = oldcmd->unsli3.rcvsli3.ox_id;
5503                 pcmd = (((struct lpfc_dmabuf *)elsiocb->context2)->virt);
5504                 rdf_resp = (struct fc_els_rdf_resp *)pcmd;
5505                 memset(rdf_resp, 0, sizeof(*rdf_resp));
5506                 rdf_resp->acc_hdr.la_cmd = ELS_LS_ACC;
5507
5508                 /* FC-LS-5 specifies desc_list_len shall be set to 12 */
5509                 rdf_resp->desc_list_len = cpu_to_be32(12);
5510
5511                 /* FC-LS-5 specifies LS REQ Information descriptor */
5512                 rdf_resp->lsri.desc_tag = cpu_to_be32(1);
5513                 rdf_resp->lsri.desc_len = cpu_to_be32(sizeof(u32));
5514                 rdf_resp->lsri.rqst_w0.cmd = ELS_RDF;
5515                 break;
5516         default:
5517                 return 1;
5518         }
5519         if (ndlp->nlp_flag & NLP_LOGO_ACC) {
5520                 spin_lock_irq(&ndlp->lock);
5521                 if (!(ndlp->nlp_flag & NLP_RPI_REGISTERED ||
5522                         ndlp->nlp_flag & NLP_REG_LOGIN_SEND))
5523                         ndlp->nlp_flag &= ~NLP_LOGO_ACC;
5524                 spin_unlock_irq(&ndlp->lock);
5525                 elsiocb->iocb_cmpl = lpfc_cmpl_els_logo_acc;
5526         } else {
5527                 elsiocb->iocb_cmpl = lpfc_cmpl_els_rsp;
5528         }
5529
5530         phba->fc_stat.elsXmitACC++;
5531         elsiocb->context1 = lpfc_nlp_get(ndlp);
5532         if (!elsiocb->context1) {
5533                 lpfc_els_free_iocb(phba, elsiocb);
5534                 return 1;
5535         }
5536
5537         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
5538         if (rc == IOCB_ERROR) {
5539                 lpfc_els_free_iocb(phba, elsiocb);
5540                 lpfc_nlp_put(ndlp);
5541                 return 1;
5542         }
5543
5544         /* Xmit ELS ACC response tag <ulpIoTag> */
5545         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
5546                          "0128 Xmit ELS ACC response Status: x%x, IoTag: x%x, "
5547                          "XRI: x%x, DID: x%x, nlp_flag: x%x nlp_state: x%x "
5548                          "RPI: x%x, fc_flag x%x refcnt %d\n",
5549                          rc, elsiocb->iotag, elsiocb->sli4_xritag,
5550                          ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
5551                          ndlp->nlp_rpi, vport->fc_flag, kref_read(&ndlp->kref));
5552         return 0;
5553 }
5554
5555 /**
5556  * lpfc_els_rsp_reject - Prepare and issue a rjt response iocb command
5557  * @vport: pointer to a virtual N_Port data structure.
5558  * @rejectError: reject response to issue
5559  * @oldiocb: pointer to the original lpfc command iocb data structure.
5560  * @ndlp: pointer to a node-list data structure.
5561  * @mbox: pointer to the driver internal queue element for mailbox command.
5562  *
5563  * This routine prepares and issue an Reject (RJT) response IOCB
5564  * command. If a @mbox pointer is passed in, it will be put into the
5565  * context_un.mbox field of the IOCB for the completion callback function
5566  * to issue to the HBA later.
5567  *
5568  * Note that the ndlp reference count will be incremented by 1 for holding the
5569  * ndlp and the reference to ndlp will be stored into the context1 field of
5570  * the IOCB for the completion callback function to the reject response
5571  * ELS IOCB command.
5572  *
5573  * Return code
5574  *   0 - Successfully issued reject response
5575  *   1 - Failed to issue reject response
5576  **/
5577 int
5578 lpfc_els_rsp_reject(struct lpfc_vport *vport, uint32_t rejectError,
5579                     struct lpfc_iocbq *oldiocb, struct lpfc_nodelist *ndlp,
5580                     LPFC_MBOXQ_t *mbox)
5581 {
5582         int rc;
5583         struct lpfc_hba  *phba = vport->phba;
5584         IOCB_t *icmd;
5585         IOCB_t *oldcmd;
5586         struct lpfc_iocbq *elsiocb;
5587         uint8_t *pcmd;
5588         uint16_t cmdsize;
5589
5590         cmdsize = 2 * sizeof(uint32_t);
5591         elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, oldiocb->retry, ndlp,
5592                                      ndlp->nlp_DID, ELS_CMD_LS_RJT);
5593         if (!elsiocb)
5594                 return 1;
5595
5596         icmd = &elsiocb->iocb;
5597         oldcmd = &oldiocb->iocb;
5598         icmd->ulpContext = oldcmd->ulpContext;  /* Xri / rx_id */
5599         icmd->unsli3.rcvsli3.ox_id = oldcmd->unsli3.rcvsli3.ox_id;
5600         pcmd = (uint8_t *) (((struct lpfc_dmabuf *) elsiocb->context2)->virt);
5601
5602         *((uint32_t *) (pcmd)) = ELS_CMD_LS_RJT;
5603         pcmd += sizeof(uint32_t);
5604         *((uint32_t *) (pcmd)) = rejectError;
5605
5606         if (mbox)
5607                 elsiocb->context_un.mbox = mbox;
5608
5609         /* Xmit ELS RJT <err> response tag <ulpIoTag> */
5610         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
5611                          "0129 Xmit ELS RJT x%x response tag x%x "
5612                          "xri x%x, did x%x, nlp_flag x%x, nlp_state x%x, "
5613                          "rpi x%x\n",
5614                          rejectError, elsiocb->iotag,
5615                          elsiocb->iocb.ulpContext, ndlp->nlp_DID,
5616                          ndlp->nlp_flag, ndlp->nlp_state, ndlp->nlp_rpi);
5617         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
5618                 "Issue LS_RJT:    did:x%x flg:x%x err:x%x",
5619                 ndlp->nlp_DID, ndlp->nlp_flag, rejectError);
5620
5621         phba->fc_stat.elsXmitLSRJT++;
5622         elsiocb->iocb_cmpl = lpfc_cmpl_els_rsp;
5623         elsiocb->context1 = lpfc_nlp_get(ndlp);
5624         if (!elsiocb->context1) {
5625                 lpfc_els_free_iocb(phba, elsiocb);
5626                 return 1;
5627         }
5628
5629         /* The NPIV instance is rejecting this unsolicited ELS. Make sure the
5630          * node's assigned RPI gets released provided this node is not already
5631          * registered with the transport.
5632          */
5633         if (phba->sli_rev == LPFC_SLI_REV4 &&
5634             vport->port_type == LPFC_NPIV_PORT &&
5635             !(ndlp->fc4_xpt_flags & SCSI_XPT_REGD)) {
5636                 spin_lock_irq(&ndlp->lock);
5637                 ndlp->nlp_flag |= NLP_RELEASE_RPI;
5638                 spin_unlock_irq(&ndlp->lock);
5639         }
5640
5641         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
5642         if (rc == IOCB_ERROR) {
5643                 lpfc_els_free_iocb(phba, elsiocb);
5644                 lpfc_nlp_put(ndlp);
5645                 return 1;
5646         }
5647
5648         return 0;
5649 }
5650
5651  /**
5652   * lpfc_issue_els_edc_rsp - Exchange Diagnostic Capabilities with the fabric.
5653   * @vport: pointer to a host virtual N_Port data structure.
5654   * @cmdiocb: pointer to the original lpfc command iocb data structure.
5655   * @ndlp: NPort to where rsp is directed
5656   *
5657   * This routine issues an EDC ACC RSP to the F-Port Controller to communicate
5658   * this N_Port's support of hardware signals in its Congestion
5659   * Capabilities Descriptor.
5660   *
5661   * Return code
5662   *   0 - Successfully issued edc rsp command
5663   *   1 - Failed to issue edc rsp command
5664   **/
5665 static int
5666 lpfc_issue_els_edc_rsp(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
5667                        struct lpfc_nodelist *ndlp)
5668 {
5669         struct lpfc_hba  *phba = vport->phba;
5670         struct lpfc_els_edc_rsp *edc_rsp;
5671         struct lpfc_iocbq *elsiocb;
5672         IOCB_t *icmd, *cmd;
5673         uint8_t *pcmd;
5674         int cmdsize, rc;
5675
5676         cmdsize = sizeof(struct lpfc_els_edc_rsp);
5677         elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, cmdiocb->retry,
5678                                      ndlp, ndlp->nlp_DID, ELS_CMD_ACC);
5679         if (!elsiocb)
5680                 return 1;
5681
5682         icmd = &elsiocb->iocb;
5683         cmd = &cmdiocb->iocb;
5684         icmd->ulpContext = cmd->ulpContext;     /* Xri / rx_id */
5685         icmd->unsli3.rcvsli3.ox_id = cmd->unsli3.rcvsli3.ox_id;
5686         pcmd = (((struct lpfc_dmabuf *)elsiocb->context2)->virt);
5687         memset(pcmd, 0, cmdsize);
5688
5689         edc_rsp = (struct lpfc_els_edc_rsp *)pcmd;
5690         edc_rsp->edc_rsp.acc_hdr.la_cmd = ELS_LS_ACC;
5691         edc_rsp->edc_rsp.desc_list_len = cpu_to_be32(
5692                 FC_TLV_DESC_LENGTH_FROM_SZ(struct lpfc_els_edc_rsp));
5693         edc_rsp->edc_rsp.lsri.desc_tag = cpu_to_be32(ELS_DTAG_LS_REQ_INFO);
5694         edc_rsp->edc_rsp.lsri.desc_len = cpu_to_be32(
5695                 FC_TLV_DESC_LENGTH_FROM_SZ(struct fc_els_lsri_desc));
5696         edc_rsp->edc_rsp.lsri.rqst_w0.cmd = ELS_EDC;
5697         lpfc_format_edc_cgn_desc(phba, &edc_rsp->cgn_desc);
5698
5699         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
5700                               "Issue EDC ACC:      did:x%x flg:x%x refcnt %d",
5701                               ndlp->nlp_DID, ndlp->nlp_flag,
5702                               kref_read(&ndlp->kref));
5703         elsiocb->iocb_cmpl = lpfc_cmpl_els_rsp;
5704
5705         phba->fc_stat.elsXmitACC++;
5706         elsiocb->context1 = lpfc_nlp_get(ndlp);
5707         if (!elsiocb->context1) {
5708                 lpfc_els_free_iocb(phba, elsiocb);
5709                 return 1;
5710         }
5711
5712         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
5713         if (rc == IOCB_ERROR) {
5714                 lpfc_els_free_iocb(phba, elsiocb);
5715                 lpfc_nlp_put(ndlp);
5716                 return 1;
5717         }
5718
5719         /* Xmit ELS ACC response tag <ulpIoTag> */
5720         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
5721                          "0152 Xmit EDC ACC response Status: x%x, IoTag: x%x, "
5722                          "XRI: x%x, DID: x%x, nlp_flag: x%x nlp_state: x%x "
5723                          "RPI: x%x, fc_flag x%x\n",
5724                          rc, elsiocb->iotag, elsiocb->sli4_xritag,
5725                          ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
5726                          ndlp->nlp_rpi, vport->fc_flag);
5727
5728         return 0;
5729 }
5730
5731 /**
5732  * lpfc_els_rsp_adisc_acc - Prepare and issue acc response to adisc iocb cmd
5733  * @vport: pointer to a virtual N_Port data structure.
5734  * @oldiocb: pointer to the original lpfc command iocb data structure.
5735  * @ndlp: pointer to a node-list data structure.
5736  *
5737  * This routine prepares and issues an Accept (ACC) response to Address
5738  * Discover (ADISC) ELS command. It simply prepares the payload of the IOCB
5739  * and invokes the lpfc_sli_issue_iocb() routine to send out the command.
5740  *
5741  * Note that the ndlp reference count will be incremented by 1 for holding the
5742  * ndlp and the reference to ndlp will be stored into the context1 field of
5743  * the IOCB for the completion callback function to the ADISC Accept response
5744  * ELS IOCB command.
5745  *
5746  * Return code
5747  *   0 - Successfully issued acc adisc response
5748  *   1 - Failed to issue adisc acc response
5749  **/
5750 int
5751 lpfc_els_rsp_adisc_acc(struct lpfc_vport *vport, struct lpfc_iocbq *oldiocb,
5752                        struct lpfc_nodelist *ndlp)
5753 {
5754         struct lpfc_hba  *phba = vport->phba;
5755         ADISC *ap;
5756         IOCB_t *icmd, *oldcmd;
5757         struct lpfc_iocbq *elsiocb;
5758         uint8_t *pcmd;
5759         uint16_t cmdsize;
5760         int rc;
5761
5762         cmdsize = sizeof(uint32_t) + sizeof(ADISC);
5763         elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, oldiocb->retry, ndlp,
5764                                      ndlp->nlp_DID, ELS_CMD_ACC);
5765         if (!elsiocb)
5766                 return 1;
5767
5768         icmd = &elsiocb->iocb;
5769         oldcmd = &oldiocb->iocb;
5770         icmd->ulpContext = oldcmd->ulpContext;  /* Xri / rx_id */
5771         icmd->unsli3.rcvsli3.ox_id = oldcmd->unsli3.rcvsli3.ox_id;
5772
5773         /* Xmit ADISC ACC response tag <ulpIoTag> */
5774         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
5775                          "0130 Xmit ADISC ACC response iotag x%x xri: "
5776                          "x%x, did x%x, nlp_flag x%x, nlp_state x%x rpi x%x\n",
5777                          elsiocb->iotag, elsiocb->iocb.ulpContext,
5778                          ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
5779                          ndlp->nlp_rpi);
5780         pcmd = (uint8_t *) (((struct lpfc_dmabuf *) elsiocb->context2)->virt);
5781
5782         *((uint32_t *) (pcmd)) = ELS_CMD_ACC;
5783         pcmd += sizeof(uint32_t);
5784
5785         ap = (ADISC *) (pcmd);
5786         ap->hardAL_PA = phba->fc_pref_ALPA;
5787         memcpy(&ap->portName, &vport->fc_portname, sizeof(struct lpfc_name));
5788         memcpy(&ap->nodeName, &vport->fc_nodename, sizeof(struct lpfc_name));
5789         ap->DID = be32_to_cpu(vport->fc_myDID);
5790
5791         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
5792                       "Issue ACC ADISC: did:x%x flg:x%x refcnt %d",
5793                       ndlp->nlp_DID, ndlp->nlp_flag, kref_read(&ndlp->kref));
5794
5795         phba->fc_stat.elsXmitACC++;
5796         elsiocb->iocb_cmpl = lpfc_cmpl_els_rsp;
5797         elsiocb->context1 = lpfc_nlp_get(ndlp);
5798         if (!elsiocb->context1) {
5799                 lpfc_els_free_iocb(phba, elsiocb);
5800                 return 1;
5801         }
5802
5803         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
5804         if (rc == IOCB_ERROR) {
5805                 lpfc_els_free_iocb(phba, elsiocb);
5806                 lpfc_nlp_put(ndlp);
5807                 return 1;
5808         }
5809
5810         /* Xmit ELS ACC response tag <ulpIoTag> */
5811         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
5812                          "0128 Xmit ELS ACC response Status: x%x, IoTag: x%x, "
5813                          "XRI: x%x, DID: x%x, nlp_flag: x%x nlp_state: x%x "
5814                          "RPI: x%x, fc_flag x%x\n",
5815                          rc, elsiocb->iotag, elsiocb->sli4_xritag,
5816                          ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
5817                          ndlp->nlp_rpi, vport->fc_flag);
5818         return 0;
5819 }
5820
5821 /**
5822  * lpfc_els_rsp_prli_acc - Prepare and issue acc response to prli iocb cmd
5823  * @vport: pointer to a virtual N_Port data structure.
5824  * @oldiocb: pointer to the original lpfc command iocb data structure.
5825  * @ndlp: pointer to a node-list data structure.
5826  *
5827  * This routine prepares and issues an Accept (ACC) response to Process
5828  * Login (PRLI) ELS command. It simply prepares the payload of the IOCB
5829  * and invokes the lpfc_sli_issue_iocb() routine to send out the command.
5830  *
5831  * Note that the ndlp reference count will be incremented by 1 for holding the
5832  * ndlp and the reference to ndlp will be stored into the context1 field of
5833  * the IOCB for the completion callback function to the PRLI Accept response
5834  * ELS IOCB command.
5835  *
5836  * Return code
5837  *   0 - Successfully issued acc prli response
5838  *   1 - Failed to issue acc prli response
5839  **/
5840 int
5841 lpfc_els_rsp_prli_acc(struct lpfc_vport *vport, struct lpfc_iocbq *oldiocb,
5842                       struct lpfc_nodelist *ndlp)
5843 {
5844         struct lpfc_hba  *phba = vport->phba;
5845         PRLI *npr;
5846         struct lpfc_nvme_prli *npr_nvme;
5847         lpfc_vpd_t *vpd;
5848         IOCB_t *icmd;
5849         IOCB_t *oldcmd;
5850         struct lpfc_iocbq *elsiocb;
5851         uint8_t *pcmd;
5852         uint16_t cmdsize;
5853         uint32_t prli_fc4_req, *req_payload;
5854         struct lpfc_dmabuf *req_buf;
5855         int rc;
5856         u32 elsrspcmd;
5857
5858         /* Need the incoming PRLI payload to determine if the ACC is for an
5859          * FC4 or NVME PRLI type.  The PRLI type is at word 1.
5860          */
5861         req_buf = (struct lpfc_dmabuf *)oldiocb->context2;
5862         req_payload = (((uint32_t *)req_buf->virt) + 1);
5863
5864         /* PRLI type payload is at byte 3 for FCP or NVME. */
5865         prli_fc4_req = be32_to_cpu(*req_payload);
5866         prli_fc4_req = (prli_fc4_req >> 24) & 0xff;
5867         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
5868                          "6127 PRLI_ACC:  Req Type x%x, Word1 x%08x\n",
5869                          prli_fc4_req, *((uint32_t *)req_payload));
5870
5871         if (prli_fc4_req == PRLI_FCP_TYPE) {
5872                 cmdsize = sizeof(uint32_t) + sizeof(PRLI);
5873                 elsrspcmd = (ELS_CMD_ACC | (ELS_CMD_PRLI & ~ELS_RSP_MASK));
5874         } else if (prli_fc4_req & PRLI_NVME_TYPE) {
5875                 cmdsize = sizeof(uint32_t) + sizeof(struct lpfc_nvme_prli);
5876                 elsrspcmd = (ELS_CMD_ACC | (ELS_CMD_NVMEPRLI & ~ELS_RSP_MASK));
5877         } else {
5878                 return 1;
5879         }
5880
5881         elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, oldiocb->retry, ndlp,
5882                 ndlp->nlp_DID, elsrspcmd);
5883         if (!elsiocb)
5884                 return 1;
5885
5886         icmd = &elsiocb->iocb;
5887         oldcmd = &oldiocb->iocb;
5888         icmd->ulpContext = oldcmd->ulpContext;  /* Xri / rx_id */
5889         icmd->unsli3.rcvsli3.ox_id = oldcmd->unsli3.rcvsli3.ox_id;
5890
5891         /* Xmit PRLI ACC response tag <ulpIoTag> */
5892         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
5893                          "0131 Xmit PRLI ACC response tag x%x xri x%x, "
5894                          "did x%x, nlp_flag x%x, nlp_state x%x, rpi x%x\n",
5895                          elsiocb->iotag, elsiocb->iocb.ulpContext,
5896                          ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
5897                          ndlp->nlp_rpi);
5898         pcmd = (uint8_t *) (((struct lpfc_dmabuf *) elsiocb->context2)->virt);
5899         memset(pcmd, 0, cmdsize);
5900
5901         *((uint32_t *)(pcmd)) = elsrspcmd;
5902         pcmd += sizeof(uint32_t);
5903
5904         /* For PRLI, remainder of payload is PRLI parameter page */
5905         vpd = &phba->vpd;
5906
5907         if (prli_fc4_req == PRLI_FCP_TYPE) {
5908                 /*
5909                  * If the remote port is a target and our firmware version
5910                  * is 3.20 or later, set the following bits for FC-TAPE
5911                  * support.
5912                  */
5913                 npr = (PRLI *) pcmd;
5914                 if ((ndlp->nlp_type & NLP_FCP_TARGET) &&
5915                     (vpd->rev.feaLevelHigh >= 0x02)) {
5916                         npr->ConfmComplAllowed = 1;
5917                         npr->Retry = 1;
5918                         npr->TaskRetryIdReq = 1;
5919                 }
5920                 npr->acceptRspCode = PRLI_REQ_EXECUTED;
5921                 npr->estabImagePair = 1;
5922                 npr->readXferRdyDis = 1;
5923                 npr->ConfmComplAllowed = 1;
5924                 npr->prliType = PRLI_FCP_TYPE;
5925                 npr->initiatorFunc = 1;
5926         } else if (prli_fc4_req & PRLI_NVME_TYPE) {
5927                 /* Respond with an NVME PRLI Type */
5928                 npr_nvme = (struct lpfc_nvme_prli *) pcmd;
5929                 bf_set(prli_type_code, npr_nvme, PRLI_NVME_TYPE);
5930                 bf_set(prli_estabImagePair, npr_nvme, 0);  /* Should be 0 */
5931                 bf_set(prli_acc_rsp_code, npr_nvme, PRLI_REQ_EXECUTED);
5932                 if (phba->nvmet_support) {
5933                         bf_set(prli_tgt, npr_nvme, 1);
5934                         bf_set(prli_disc, npr_nvme, 1);
5935                         if (phba->cfg_nvme_enable_fb) {
5936                                 bf_set(prli_fba, npr_nvme, 1);
5937
5938                                 /* TBD.  Target mode needs to post buffers
5939                                  * that support the configured first burst
5940                                  * byte size.
5941                                  */
5942                                 bf_set(prli_fb_sz, npr_nvme,
5943                                        phba->cfg_nvmet_fb_size);
5944                         }
5945                 } else {
5946                         bf_set(prli_init, npr_nvme, 1);
5947                 }
5948
5949                 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC,
5950                                  "6015 NVME issue PRLI ACC word1 x%08x "
5951                                  "word4 x%08x word5 x%08x flag x%x, "
5952                                  "fcp_info x%x nlp_type x%x\n",
5953                                  npr_nvme->word1, npr_nvme->word4,
5954                                  npr_nvme->word5, ndlp->nlp_flag,
5955                                  ndlp->nlp_fcp_info, ndlp->nlp_type);
5956                 npr_nvme->word1 = cpu_to_be32(npr_nvme->word1);
5957                 npr_nvme->word4 = cpu_to_be32(npr_nvme->word4);
5958                 npr_nvme->word5 = cpu_to_be32(npr_nvme->word5);
5959         } else
5960                 lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
5961                                  "6128 Unknown FC_TYPE x%x x%x ndlp x%06x\n",
5962                                  prli_fc4_req, ndlp->nlp_fc4_type,
5963                                  ndlp->nlp_DID);
5964
5965         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
5966                       "Issue ACC PRLI:  did:x%x flg:x%x",
5967                       ndlp->nlp_DID, ndlp->nlp_flag, kref_read(&ndlp->kref));
5968
5969         phba->fc_stat.elsXmitACC++;
5970         elsiocb->iocb_cmpl = lpfc_cmpl_els_rsp;
5971         elsiocb->context1 =  lpfc_nlp_get(ndlp);
5972         if (!elsiocb->context1) {
5973                 lpfc_els_free_iocb(phba, elsiocb);
5974                 return 1;
5975         }
5976
5977         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
5978         if (rc == IOCB_ERROR) {
5979                 lpfc_els_free_iocb(phba, elsiocb);
5980                 lpfc_nlp_put(ndlp);
5981                 return 1;
5982         }
5983
5984         return 0;
5985 }
5986
5987 /**
5988  * lpfc_els_rsp_rnid_acc - Issue rnid acc response iocb command
5989  * @vport: pointer to a virtual N_Port data structure.
5990  * @format: rnid command format.
5991  * @oldiocb: pointer to the original lpfc command iocb data structure.
5992  * @ndlp: pointer to a node-list data structure.
5993  *
5994  * This routine issues a Request Node Identification Data (RNID) Accept
5995  * (ACC) response. It constructs the RNID ACC response command according to
5996  * the proper @format and then calls the lpfc_sli_issue_iocb() routine to
5997  * issue the response.
5998  *
5999  * Note that the ndlp reference count will be incremented by 1 for holding the
6000  * ndlp and the reference to ndlp will be stored into the context1 field of
6001  * the IOCB for the completion callback function.
6002  *
6003  * Return code
6004  *   0 - Successfully issued acc rnid response
6005  *   1 - Failed to issue acc rnid response
6006  **/
6007 static int
6008 lpfc_els_rsp_rnid_acc(struct lpfc_vport *vport, uint8_t format,
6009                       struct lpfc_iocbq *oldiocb, struct lpfc_nodelist *ndlp)
6010 {
6011         struct lpfc_hba  *phba = vport->phba;
6012         RNID *rn;
6013         IOCB_t *icmd, *oldcmd;
6014         struct lpfc_iocbq *elsiocb;
6015         uint8_t *pcmd;
6016         uint16_t cmdsize;
6017         int rc;
6018
6019         cmdsize = sizeof(uint32_t) + sizeof(uint32_t)
6020                                         + (2 * sizeof(struct lpfc_name));
6021         if (format)
6022                 cmdsize += sizeof(RNID_TOP_DISC);
6023
6024         elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, oldiocb->retry, ndlp,
6025                                      ndlp->nlp_DID, ELS_CMD_ACC);
6026         if (!elsiocb)
6027                 return 1;
6028
6029         icmd = &elsiocb->iocb;
6030         oldcmd = &oldiocb->iocb;
6031         icmd->ulpContext = oldcmd->ulpContext;  /* Xri / rx_id */
6032         icmd->unsli3.rcvsli3.ox_id = oldcmd->unsli3.rcvsli3.ox_id;
6033
6034         /* Xmit RNID ACC response tag <ulpIoTag> */
6035         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
6036                          "0132 Xmit RNID ACC response tag x%x xri x%x\n",
6037                          elsiocb->iotag, elsiocb->iocb.ulpContext);
6038         pcmd = (uint8_t *) (((struct lpfc_dmabuf *) elsiocb->context2)->virt);
6039         *((uint32_t *) (pcmd)) = ELS_CMD_ACC;
6040         pcmd += sizeof(uint32_t);
6041
6042         memset(pcmd, 0, sizeof(RNID));
6043         rn = (RNID *) (pcmd);
6044         rn->Format = format;
6045         rn->CommonLen = (2 * sizeof(struct lpfc_name));
6046         memcpy(&rn->portName, &vport->fc_portname, sizeof(struct lpfc_name));
6047         memcpy(&rn->nodeName, &vport->fc_nodename, sizeof(struct lpfc_name));
6048         switch (format) {
6049         case 0:
6050                 rn->SpecificLen = 0;
6051                 break;
6052         case RNID_TOPOLOGY_DISC:
6053                 rn->SpecificLen = sizeof(RNID_TOP_DISC);
6054                 memcpy(&rn->un.topologyDisc.portName,
6055                        &vport->fc_portname, sizeof(struct lpfc_name));
6056                 rn->un.topologyDisc.unitType = RNID_HBA;
6057                 rn->un.topologyDisc.physPort = 0;
6058                 rn->un.topologyDisc.attachedNodes = 0;
6059                 break;
6060         default:
6061                 rn->CommonLen = 0;
6062                 rn->SpecificLen = 0;
6063                 break;
6064         }
6065
6066         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
6067                       "Issue ACC RNID:  did:x%x flg:x%x refcnt %d",
6068                       ndlp->nlp_DID, ndlp->nlp_flag, kref_read(&ndlp->kref));
6069
6070         phba->fc_stat.elsXmitACC++;
6071         elsiocb->iocb_cmpl = lpfc_cmpl_els_rsp;
6072         elsiocb->context1 = lpfc_nlp_get(ndlp);
6073         if (!elsiocb->context1) {
6074                 lpfc_els_free_iocb(phba, elsiocb);
6075                 return 1;
6076         }
6077
6078         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
6079         if (rc == IOCB_ERROR) {
6080                 lpfc_els_free_iocb(phba, elsiocb);
6081                 lpfc_nlp_put(ndlp);
6082                 return 1;
6083         }
6084
6085         return 0;
6086 }
6087
6088 /**
6089  * lpfc_els_clear_rrq - Clear the rq that this rrq describes.
6090  * @vport: pointer to a virtual N_Port data structure.
6091  * @iocb: pointer to the lpfc command iocb data structure.
6092  * @ndlp: pointer to a node-list data structure.
6093  *
6094  * Return
6095  **/
6096 static void
6097 lpfc_els_clear_rrq(struct lpfc_vport *vport,
6098                    struct lpfc_iocbq *iocb, struct lpfc_nodelist *ndlp)
6099 {
6100         struct lpfc_hba  *phba = vport->phba;
6101         uint8_t *pcmd;
6102         struct RRQ *rrq;
6103         uint16_t rxid;
6104         uint16_t xri;
6105         struct lpfc_node_rrq *prrq;
6106
6107
6108         pcmd = (uint8_t *) (((struct lpfc_dmabuf *) iocb->context2)->virt);
6109         pcmd += sizeof(uint32_t);
6110         rrq = (struct RRQ *)pcmd;
6111         rrq->rrq_exchg = be32_to_cpu(rrq->rrq_exchg);
6112         rxid = bf_get(rrq_rxid, rrq);
6113
6114         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
6115                         "2883 Clear RRQ for SID:x%x OXID:x%x RXID:x%x"
6116                         " x%x x%x\n",
6117                         be32_to_cpu(bf_get(rrq_did, rrq)),
6118                         bf_get(rrq_oxid, rrq),
6119                         rxid,
6120                         iocb->iotag, iocb->iocb.ulpContext);
6121
6122         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
6123                 "Clear RRQ:  did:x%x flg:x%x exchg:x%.08x",
6124                 ndlp->nlp_DID, ndlp->nlp_flag, rrq->rrq_exchg);
6125         if (vport->fc_myDID == be32_to_cpu(bf_get(rrq_did, rrq)))
6126                 xri = bf_get(rrq_oxid, rrq);
6127         else
6128                 xri = rxid;
6129         prrq = lpfc_get_active_rrq(vport, xri, ndlp->nlp_DID);
6130         if (prrq)
6131                 lpfc_clr_rrq_active(phba, xri, prrq);
6132         return;
6133 }
6134
6135 /**
6136  * lpfc_els_rsp_echo_acc - Issue echo acc response
6137  * @vport: pointer to a virtual N_Port data structure.
6138  * @data: pointer to echo data to return in the accept.
6139  * @oldiocb: pointer to the original lpfc command iocb data structure.
6140  * @ndlp: pointer to a node-list data structure.
6141  *
6142  * Return code
6143  *   0 - Successfully issued acc echo response
6144  *   1 - Failed to issue acc echo response
6145  **/
6146 static int
6147 lpfc_els_rsp_echo_acc(struct lpfc_vport *vport, uint8_t *data,
6148                       struct lpfc_iocbq *oldiocb, struct lpfc_nodelist *ndlp)
6149 {
6150         struct lpfc_hba  *phba = vport->phba;
6151         struct lpfc_iocbq *elsiocb;
6152         uint8_t *pcmd;
6153         uint16_t cmdsize;
6154         int rc;
6155
6156         cmdsize = oldiocb->iocb.unsli3.rcvsli3.acc_len;
6157
6158         /* The accumulated length can exceed the BPL_SIZE.  For
6159          * now, use this as the limit
6160          */
6161         if (cmdsize > LPFC_BPL_SIZE)
6162                 cmdsize = LPFC_BPL_SIZE;
6163         elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, oldiocb->retry, ndlp,
6164                                      ndlp->nlp_DID, ELS_CMD_ACC);
6165         if (!elsiocb)
6166                 return 1;
6167
6168         elsiocb->iocb.ulpContext = oldiocb->iocb.ulpContext;  /* Xri / rx_id */
6169         elsiocb->iocb.unsli3.rcvsli3.ox_id = oldiocb->iocb.unsli3.rcvsli3.ox_id;
6170
6171         /* Xmit ECHO ACC response tag <ulpIoTag> */
6172         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
6173                          "2876 Xmit ECHO ACC response tag x%x xri x%x\n",
6174                          elsiocb->iotag, elsiocb->iocb.ulpContext);
6175         pcmd = (uint8_t *) (((struct lpfc_dmabuf *) elsiocb->context2)->virt);
6176         *((uint32_t *) (pcmd)) = ELS_CMD_ACC;
6177         pcmd += sizeof(uint32_t);
6178         memcpy(pcmd, data, cmdsize - sizeof(uint32_t));
6179
6180         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_RSP,
6181                       "Issue ACC ECHO:  did:x%x flg:x%x refcnt %d",
6182                       ndlp->nlp_DID, ndlp->nlp_flag, kref_read(&ndlp->kref));
6183
6184         phba->fc_stat.elsXmitACC++;
6185         elsiocb->iocb_cmpl = lpfc_cmpl_els_rsp;
6186         elsiocb->context1 =  lpfc_nlp_get(ndlp);
6187         if (!elsiocb->context1) {
6188                 lpfc_els_free_iocb(phba, elsiocb);
6189                 return 1;
6190         }
6191
6192         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
6193         if (rc == IOCB_ERROR) {
6194                 lpfc_els_free_iocb(phba, elsiocb);
6195                 lpfc_nlp_put(ndlp);
6196                 return 1;
6197         }
6198
6199         return 0;
6200 }
6201
6202 /**
6203  * lpfc_els_disc_adisc - Issue remaining adisc iocbs to npr nodes of a vport
6204  * @vport: pointer to a host virtual N_Port data structure.
6205  *
6206  * This routine issues Address Discover (ADISC) ELS commands to those
6207  * N_Ports which are in node port recovery state and ADISC has not been issued
6208  * for the @vport. Each time an ELS ADISC IOCB is issued by invoking the
6209  * lpfc_issue_els_adisc() routine, the per @vport number of discover count
6210  * (num_disc_nodes) shall be incremented. If the num_disc_nodes reaches a
6211  * pre-configured threshold (cfg_discovery_threads), the @vport fc_flag will
6212  * be marked with FC_NLP_MORE bit and the process of issuing remaining ADISC
6213  * IOCBs quit for later pick up. On the other hand, after walking through
6214  * all the ndlps with the @vport and there is none ADISC IOCB issued, the
6215  * @vport fc_flag shall be cleared with FC_NLP_MORE bit indicating there is
6216  * no more ADISC need to be sent.
6217  *
6218  * Return code
6219  *    The number of N_Ports with adisc issued.
6220  **/
6221 int
6222 lpfc_els_disc_adisc(struct lpfc_vport *vport)
6223 {
6224         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
6225         struct lpfc_nodelist *ndlp, *next_ndlp;
6226         int sentadisc = 0;
6227
6228         /* go thru NPR nodes and issue any remaining ELS ADISCs */
6229         list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) {
6230
6231                 if (ndlp->nlp_state != NLP_STE_NPR_NODE ||
6232                     !(ndlp->nlp_flag & NLP_NPR_ADISC))
6233                         continue;
6234
6235                 spin_lock_irq(&ndlp->lock);
6236                 ndlp->nlp_flag &= ~NLP_NPR_ADISC;
6237                 spin_unlock_irq(&ndlp->lock);
6238
6239                 if (!(ndlp->nlp_flag & NLP_NPR_2B_DISC)) {
6240                         /* This node was marked for ADISC but was not picked
6241                          * for discovery. This is possible if the node was
6242                          * missing in gidft response.
6243                          *
6244                          * At time of marking node for ADISC, we skipped unreg
6245                          * from backend
6246                          */
6247                         lpfc_nlp_unreg_node(vport, ndlp);
6248                         lpfc_unreg_rpi(vport, ndlp);
6249                         continue;
6250                 }
6251
6252                 ndlp->nlp_prev_state = ndlp->nlp_state;
6253                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_ADISC_ISSUE);
6254                 lpfc_issue_els_adisc(vport, ndlp, 0);
6255                 sentadisc++;
6256                 vport->num_disc_nodes++;
6257                 if (vport->num_disc_nodes >=
6258                                 vport->cfg_discovery_threads) {
6259                         spin_lock_irq(shost->host_lock);
6260                         vport->fc_flag |= FC_NLP_MORE;
6261                         spin_unlock_irq(shost->host_lock);
6262                         break;
6263                 }
6264
6265         }
6266         if (sentadisc == 0) {
6267                 spin_lock_irq(shost->host_lock);
6268                 vport->fc_flag &= ~FC_NLP_MORE;
6269                 spin_unlock_irq(shost->host_lock);
6270         }
6271         return sentadisc;
6272 }
6273
6274 /**
6275  * lpfc_els_disc_plogi - Issue plogi for all npr nodes of a vport before adisc
6276  * @vport: pointer to a host virtual N_Port data structure.
6277  *
6278  * This routine issues Port Login (PLOGI) ELS commands to all the N_Ports
6279  * which are in node port recovery state, with a @vport. Each time an ELS
6280  * ADISC PLOGI IOCB is issued by invoking the lpfc_issue_els_plogi() routine,
6281  * the per @vport number of discover count (num_disc_nodes) shall be
6282  * incremented. If the num_disc_nodes reaches a pre-configured threshold
6283  * (cfg_discovery_threads), the @vport fc_flag will be marked with FC_NLP_MORE
6284  * bit set and quit the process of issuing remaining ADISC PLOGIN IOCBs for
6285  * later pick up. On the other hand, after walking through all the ndlps with
6286  * the @vport and there is none ADISC PLOGI IOCB issued, the @vport fc_flag
6287  * shall be cleared with the FC_NLP_MORE bit indicating there is no more ADISC
6288  * PLOGI need to be sent.
6289  *
6290  * Return code
6291  *   The number of N_Ports with plogi issued.
6292  **/
6293 int
6294 lpfc_els_disc_plogi(struct lpfc_vport *vport)
6295 {
6296         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
6297         struct lpfc_nodelist *ndlp, *next_ndlp;
6298         int sentplogi = 0;
6299
6300         /* go thru NPR nodes and issue any remaining ELS PLOGIs */
6301         list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) {
6302                 if (ndlp->nlp_state == NLP_STE_NPR_NODE &&
6303                                 (ndlp->nlp_flag & NLP_NPR_2B_DISC) != 0 &&
6304                                 (ndlp->nlp_flag & NLP_DELAY_TMO) == 0 &&
6305                                 (ndlp->nlp_flag & NLP_NPR_ADISC) == 0) {
6306                         ndlp->nlp_prev_state = ndlp->nlp_state;
6307                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
6308                         lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0);
6309                         sentplogi++;
6310                         vport->num_disc_nodes++;
6311                         if (vport->num_disc_nodes >=
6312                                         vport->cfg_discovery_threads) {
6313                                 spin_lock_irq(shost->host_lock);
6314                                 vport->fc_flag |= FC_NLP_MORE;
6315                                 spin_unlock_irq(shost->host_lock);
6316                                 break;
6317                         }
6318                 }
6319         }
6320
6321         lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
6322                          "6452 Discover PLOGI %d flag x%x\n",
6323                          sentplogi, vport->fc_flag);
6324
6325         if (sentplogi) {
6326                 lpfc_set_disctmo(vport);
6327         }
6328         else {
6329                 spin_lock_irq(shost->host_lock);
6330                 vport->fc_flag &= ~FC_NLP_MORE;
6331                 spin_unlock_irq(shost->host_lock);
6332         }
6333         return sentplogi;
6334 }
6335
6336 static uint32_t
6337 lpfc_rdp_res_link_service(struct fc_rdp_link_service_desc *desc,
6338                 uint32_t word0)
6339 {
6340
6341         desc->tag = cpu_to_be32(RDP_LINK_SERVICE_DESC_TAG);
6342         desc->payload.els_req = word0;
6343         desc->length = cpu_to_be32(sizeof(desc->payload));
6344
6345         return sizeof(struct fc_rdp_link_service_desc);
6346 }
6347
6348 static uint32_t
6349 lpfc_rdp_res_sfp_desc(struct fc_rdp_sfp_desc *desc,
6350                 uint8_t *page_a0, uint8_t *page_a2)
6351 {
6352         uint16_t wavelength;
6353         uint16_t temperature;
6354         uint16_t rx_power;
6355         uint16_t tx_bias;
6356         uint16_t tx_power;
6357         uint16_t vcc;
6358         uint16_t flag = 0;
6359         struct sff_trasnceiver_codes_byte4 *trasn_code_byte4;
6360         struct sff_trasnceiver_codes_byte5 *trasn_code_byte5;
6361
6362         desc->tag = cpu_to_be32(RDP_SFP_DESC_TAG);
6363
6364         trasn_code_byte4 = (struct sff_trasnceiver_codes_byte4 *)
6365                         &page_a0[SSF_TRANSCEIVER_CODE_B4];
6366         trasn_code_byte5 = (struct sff_trasnceiver_codes_byte5 *)
6367                         &page_a0[SSF_TRANSCEIVER_CODE_B5];
6368
6369         if ((trasn_code_byte4->fc_sw_laser) ||
6370             (trasn_code_byte5->fc_sw_laser_sl) ||
6371             (trasn_code_byte5->fc_sw_laser_sn)) {  /* check if its short WL */
6372                 flag |= (SFP_FLAG_PT_SWLASER << SFP_FLAG_PT_SHIFT);
6373         } else if (trasn_code_byte4->fc_lw_laser) {
6374                 wavelength = (page_a0[SSF_WAVELENGTH_B1] << 8) |
6375                         page_a0[SSF_WAVELENGTH_B0];
6376                 if (wavelength == SFP_WAVELENGTH_LC1310)
6377                         flag |= SFP_FLAG_PT_LWLASER_LC1310 << SFP_FLAG_PT_SHIFT;
6378                 if (wavelength == SFP_WAVELENGTH_LL1550)
6379                         flag |= SFP_FLAG_PT_LWLASER_LL1550 << SFP_FLAG_PT_SHIFT;
6380         }
6381         /* check if its SFP+ */
6382         flag |= ((page_a0[SSF_IDENTIFIER] == SFF_PG0_IDENT_SFP) ?
6383                         SFP_FLAG_CT_SFP_PLUS : SFP_FLAG_CT_UNKNOWN)
6384                                         << SFP_FLAG_CT_SHIFT;
6385
6386         /* check if its OPTICAL */
6387         flag |= ((page_a0[SSF_CONNECTOR] == SFF_PG0_CONNECTOR_LC) ?
6388                         SFP_FLAG_IS_OPTICAL_PORT : 0)
6389                                         << SFP_FLAG_IS_OPTICAL_SHIFT;
6390
6391         temperature = (page_a2[SFF_TEMPERATURE_B1] << 8 |
6392                 page_a2[SFF_TEMPERATURE_B0]);
6393         vcc = (page_a2[SFF_VCC_B1] << 8 |
6394                 page_a2[SFF_VCC_B0]);
6395         tx_power = (page_a2[SFF_TXPOWER_B1] << 8 |
6396                 page_a2[SFF_TXPOWER_B0]);
6397         tx_bias = (page_a2[SFF_TX_BIAS_CURRENT_B1] << 8 |
6398                 page_a2[SFF_TX_BIAS_CURRENT_B0]);
6399         rx_power = (page_a2[SFF_RXPOWER_B1] << 8 |
6400                 page_a2[SFF_RXPOWER_B0]);
6401         desc->sfp_info.temperature = cpu_to_be16(temperature);
6402         desc->sfp_info.rx_power = cpu_to_be16(rx_power);
6403         desc->sfp_info.tx_bias = cpu_to_be16(tx_bias);
6404         desc->sfp_info.tx_power = cpu_to_be16(tx_power);
6405         desc->sfp_info.vcc = cpu_to_be16(vcc);
6406
6407         desc->sfp_info.flags = cpu_to_be16(flag);
6408         desc->length = cpu_to_be32(sizeof(desc->sfp_info));
6409
6410         return sizeof(struct fc_rdp_sfp_desc);
6411 }
6412
6413 static uint32_t
6414 lpfc_rdp_res_link_error(struct fc_rdp_link_error_status_desc *desc,
6415                 READ_LNK_VAR *stat)
6416 {
6417         uint32_t type;
6418
6419         desc->tag = cpu_to_be32(RDP_LINK_ERROR_STATUS_DESC_TAG);
6420
6421         type = VN_PT_PHY_PF_PORT << VN_PT_PHY_SHIFT;
6422
6423         desc->info.port_type = cpu_to_be32(type);
6424
6425         desc->info.link_status.link_failure_cnt =
6426                 cpu_to_be32(stat->linkFailureCnt);
6427         desc->info.link_status.loss_of_synch_cnt =
6428                 cpu_to_be32(stat->lossSyncCnt);
6429         desc->info.link_status.loss_of_signal_cnt =
6430                 cpu_to_be32(stat->lossSignalCnt);
6431         desc->info.link_status.primitive_seq_proto_err =
6432                 cpu_to_be32(stat->primSeqErrCnt);
6433         desc->info.link_status.invalid_trans_word =
6434                 cpu_to_be32(stat->invalidXmitWord);
6435         desc->info.link_status.invalid_crc_cnt = cpu_to_be32(stat->crcCnt);
6436
6437         desc->length = cpu_to_be32(sizeof(desc->info));
6438
6439         return sizeof(struct fc_rdp_link_error_status_desc);
6440 }
6441
6442 static uint32_t
6443 lpfc_rdp_res_bbc_desc(struct fc_rdp_bbc_desc *desc, READ_LNK_VAR *stat,
6444                       struct lpfc_vport *vport)
6445 {
6446         uint32_t bbCredit;
6447
6448         desc->tag = cpu_to_be32(RDP_BBC_DESC_TAG);
6449
6450         bbCredit = vport->fc_sparam.cmn.bbCreditLsb |
6451                         (vport->fc_sparam.cmn.bbCreditMsb << 8);
6452         desc->bbc_info.port_bbc = cpu_to_be32(bbCredit);
6453         if (vport->phba->fc_topology != LPFC_TOPOLOGY_LOOP) {
6454                 bbCredit = vport->phba->fc_fabparam.cmn.bbCreditLsb |
6455                         (vport->phba->fc_fabparam.cmn.bbCreditMsb << 8);
6456                 desc->bbc_info.attached_port_bbc = cpu_to_be32(bbCredit);
6457         } else {
6458                 desc->bbc_info.attached_port_bbc = 0;
6459         }
6460
6461         desc->bbc_info.rtt = 0;
6462         desc->length = cpu_to_be32(sizeof(desc->bbc_info));
6463
6464         return sizeof(struct fc_rdp_bbc_desc);
6465 }
6466
6467 static uint32_t
6468 lpfc_rdp_res_oed_temp_desc(struct lpfc_hba *phba,
6469                            struct fc_rdp_oed_sfp_desc *desc, uint8_t *page_a2)
6470 {
6471         uint32_t flags = 0;
6472
6473         desc->tag = cpu_to_be32(RDP_OED_DESC_TAG);
6474
6475         desc->oed_info.hi_alarm = page_a2[SSF_TEMP_HIGH_ALARM];
6476         desc->oed_info.lo_alarm = page_a2[SSF_TEMP_LOW_ALARM];
6477         desc->oed_info.hi_warning = page_a2[SSF_TEMP_HIGH_WARNING];
6478         desc->oed_info.lo_warning = page_a2[SSF_TEMP_LOW_WARNING];
6479
6480         if (phba->sfp_alarm & LPFC_TRANSGRESSION_HIGH_TEMPERATURE)
6481                 flags |= RDP_OET_HIGH_ALARM;
6482         if (phba->sfp_alarm & LPFC_TRANSGRESSION_LOW_TEMPERATURE)
6483                 flags |= RDP_OET_LOW_ALARM;
6484         if (phba->sfp_warning & LPFC_TRANSGRESSION_HIGH_TEMPERATURE)
6485                 flags |= RDP_OET_HIGH_WARNING;
6486         if (phba->sfp_warning & LPFC_TRANSGRESSION_LOW_TEMPERATURE)
6487                 flags |= RDP_OET_LOW_WARNING;
6488
6489         flags |= ((0xf & RDP_OED_TEMPERATURE) << RDP_OED_TYPE_SHIFT);
6490         desc->oed_info.function_flags = cpu_to_be32(flags);
6491         desc->length = cpu_to_be32(sizeof(desc->oed_info));
6492         return sizeof(struct fc_rdp_oed_sfp_desc);
6493 }
6494
6495 static uint32_t
6496 lpfc_rdp_res_oed_voltage_desc(struct lpfc_hba *phba,
6497                               struct fc_rdp_oed_sfp_desc *desc,
6498                               uint8_t *page_a2)
6499 {
6500         uint32_t flags = 0;
6501
6502         desc->tag = cpu_to_be32(RDP_OED_DESC_TAG);
6503
6504         desc->oed_info.hi_alarm = page_a2[SSF_VOLTAGE_HIGH_ALARM];
6505         desc->oed_info.lo_alarm = page_a2[SSF_VOLTAGE_LOW_ALARM];
6506         desc->oed_info.hi_warning = page_a2[SSF_VOLTAGE_HIGH_WARNING];
6507         desc->oed_info.lo_warning = page_a2[SSF_VOLTAGE_LOW_WARNING];
6508
6509         if (phba->sfp_alarm & LPFC_TRANSGRESSION_HIGH_VOLTAGE)
6510                 flags |= RDP_OET_HIGH_ALARM;
6511         if (phba->sfp_alarm & LPFC_TRANSGRESSION_LOW_VOLTAGE)
6512                 flags |= RDP_OET_LOW_ALARM;
6513         if (phba->sfp_warning & LPFC_TRANSGRESSION_HIGH_VOLTAGE)
6514                 flags |= RDP_OET_HIGH_WARNING;
6515         if (phba->sfp_warning & LPFC_TRANSGRESSION_LOW_VOLTAGE)
6516                 flags |= RDP_OET_LOW_WARNING;
6517
6518         flags |= ((0xf & RDP_OED_VOLTAGE) << RDP_OED_TYPE_SHIFT);
6519         desc->oed_info.function_flags = cpu_to_be32(flags);
6520         desc->length = cpu_to_be32(sizeof(desc->oed_info));
6521         return sizeof(struct fc_rdp_oed_sfp_desc);
6522 }
6523
6524 static uint32_t
6525 lpfc_rdp_res_oed_txbias_desc(struct lpfc_hba *phba,
6526                              struct fc_rdp_oed_sfp_desc *desc,
6527                              uint8_t *page_a2)
6528 {
6529         uint32_t flags = 0;
6530
6531         desc->tag = cpu_to_be32(RDP_OED_DESC_TAG);
6532
6533         desc->oed_info.hi_alarm = page_a2[SSF_BIAS_HIGH_ALARM];
6534         desc->oed_info.lo_alarm = page_a2[SSF_BIAS_LOW_ALARM];
6535         desc->oed_info.hi_warning = page_a2[SSF_BIAS_HIGH_WARNING];
6536         desc->oed_info.lo_warning = page_a2[SSF_BIAS_LOW_WARNING];
6537
6538         if (phba->sfp_alarm & LPFC_TRANSGRESSION_HIGH_TXBIAS)
6539                 flags |= RDP_OET_HIGH_ALARM;
6540         if (phba->sfp_alarm & LPFC_TRANSGRESSION_LOW_TXBIAS)
6541                 flags |= RDP_OET_LOW_ALARM;
6542         if (phba->sfp_warning & LPFC_TRANSGRESSION_HIGH_TXBIAS)
6543                 flags |= RDP_OET_HIGH_WARNING;
6544         if (phba->sfp_warning & LPFC_TRANSGRESSION_LOW_TXBIAS)
6545                 flags |= RDP_OET_LOW_WARNING;
6546
6547         flags |= ((0xf & RDP_OED_TXBIAS) << RDP_OED_TYPE_SHIFT);
6548         desc->oed_info.function_flags = cpu_to_be32(flags);
6549         desc->length = cpu_to_be32(sizeof(desc->oed_info));
6550         return sizeof(struct fc_rdp_oed_sfp_desc);
6551 }
6552
6553 static uint32_t
6554 lpfc_rdp_res_oed_txpower_desc(struct lpfc_hba *phba,
6555                               struct fc_rdp_oed_sfp_desc *desc,
6556                               uint8_t *page_a2)
6557 {
6558         uint32_t flags = 0;
6559
6560         desc->tag = cpu_to_be32(RDP_OED_DESC_TAG);
6561
6562         desc->oed_info.hi_alarm = page_a2[SSF_TXPOWER_HIGH_ALARM];
6563         desc->oed_info.lo_alarm = page_a2[SSF_TXPOWER_LOW_ALARM];
6564         desc->oed_info.hi_warning = page_a2[SSF_TXPOWER_HIGH_WARNING];
6565         desc->oed_info.lo_warning = page_a2[SSF_TXPOWER_LOW_WARNING];
6566
6567         if (phba->sfp_alarm & LPFC_TRANSGRESSION_HIGH_TXPOWER)
6568                 flags |= RDP_OET_HIGH_ALARM;
6569         if (phba->sfp_alarm & LPFC_TRANSGRESSION_LOW_TXPOWER)
6570                 flags |= RDP_OET_LOW_ALARM;
6571         if (phba->sfp_warning & LPFC_TRANSGRESSION_HIGH_TXPOWER)
6572                 flags |= RDP_OET_HIGH_WARNING;
6573         if (phba->sfp_warning & LPFC_TRANSGRESSION_LOW_TXPOWER)
6574                 flags |= RDP_OET_LOW_WARNING;
6575
6576         flags |= ((0xf & RDP_OED_TXPOWER) << RDP_OED_TYPE_SHIFT);
6577         desc->oed_info.function_flags = cpu_to_be32(flags);
6578         desc->length = cpu_to_be32(sizeof(desc->oed_info));
6579         return sizeof(struct fc_rdp_oed_sfp_desc);
6580 }
6581
6582
6583 static uint32_t
6584 lpfc_rdp_res_oed_rxpower_desc(struct lpfc_hba *phba,
6585                               struct fc_rdp_oed_sfp_desc *desc,
6586                               uint8_t *page_a2)
6587 {
6588         uint32_t flags = 0;
6589
6590         desc->tag = cpu_to_be32(RDP_OED_DESC_TAG);
6591
6592         desc->oed_info.hi_alarm = page_a2[SSF_RXPOWER_HIGH_ALARM];
6593         desc->oed_info.lo_alarm = page_a2[SSF_RXPOWER_LOW_ALARM];
6594         desc->oed_info.hi_warning = page_a2[SSF_RXPOWER_HIGH_WARNING];
6595         desc->oed_info.lo_warning = page_a2[SSF_RXPOWER_LOW_WARNING];
6596
6597         if (phba->sfp_alarm & LPFC_TRANSGRESSION_HIGH_RXPOWER)
6598                 flags |= RDP_OET_HIGH_ALARM;
6599         if (phba->sfp_alarm & LPFC_TRANSGRESSION_LOW_RXPOWER)
6600                 flags |= RDP_OET_LOW_ALARM;
6601         if (phba->sfp_warning & LPFC_TRANSGRESSION_HIGH_RXPOWER)
6602                 flags |= RDP_OET_HIGH_WARNING;
6603         if (phba->sfp_warning & LPFC_TRANSGRESSION_LOW_RXPOWER)
6604                 flags |= RDP_OET_LOW_WARNING;
6605
6606         flags |= ((0xf & RDP_OED_RXPOWER) << RDP_OED_TYPE_SHIFT);
6607         desc->oed_info.function_flags = cpu_to_be32(flags);
6608         desc->length = cpu_to_be32(sizeof(desc->oed_info));
6609         return sizeof(struct fc_rdp_oed_sfp_desc);
6610 }
6611
6612 static uint32_t
6613 lpfc_rdp_res_opd_desc(struct fc_rdp_opd_sfp_desc *desc,
6614                       uint8_t *page_a0, struct lpfc_vport *vport)
6615 {
6616         desc->tag = cpu_to_be32(RDP_OPD_DESC_TAG);
6617         memcpy(desc->opd_info.vendor_name, &page_a0[SSF_VENDOR_NAME], 16);
6618         memcpy(desc->opd_info.model_number, &page_a0[SSF_VENDOR_PN], 16);
6619         memcpy(desc->opd_info.serial_number, &page_a0[SSF_VENDOR_SN], 16);
6620         memcpy(desc->opd_info.revision, &page_a0[SSF_VENDOR_REV], 4);
6621         memcpy(desc->opd_info.date, &page_a0[SSF_DATE_CODE], 8);
6622         desc->length = cpu_to_be32(sizeof(desc->opd_info));
6623         return sizeof(struct fc_rdp_opd_sfp_desc);
6624 }
6625
6626 static uint32_t
6627 lpfc_rdp_res_fec_desc(struct fc_fec_rdp_desc *desc, READ_LNK_VAR *stat)
6628 {
6629         if (bf_get(lpfc_read_link_stat_gec2, stat) == 0)
6630                 return 0;
6631         desc->tag = cpu_to_be32(RDP_FEC_DESC_TAG);
6632
6633         desc->info.CorrectedBlocks =
6634                 cpu_to_be32(stat->fecCorrBlkCount);
6635         desc->info.UncorrectableBlocks =
6636                 cpu_to_be32(stat->fecUncorrBlkCount);
6637
6638         desc->length = cpu_to_be32(sizeof(desc->info));
6639
6640         return sizeof(struct fc_fec_rdp_desc);
6641 }
6642
6643 static uint32_t
6644 lpfc_rdp_res_speed(struct fc_rdp_port_speed_desc *desc, struct lpfc_hba *phba)
6645 {
6646         uint16_t rdp_cap = 0;
6647         uint16_t rdp_speed;
6648
6649         desc->tag = cpu_to_be32(RDP_PORT_SPEED_DESC_TAG);
6650
6651         switch (phba->fc_linkspeed) {
6652         case LPFC_LINK_SPEED_1GHZ:
6653                 rdp_speed = RDP_PS_1GB;
6654                 break;
6655         case LPFC_LINK_SPEED_2GHZ:
6656                 rdp_speed = RDP_PS_2GB;
6657                 break;
6658         case LPFC_LINK_SPEED_4GHZ:
6659                 rdp_speed = RDP_PS_4GB;
6660                 break;
6661         case LPFC_LINK_SPEED_8GHZ:
6662                 rdp_speed = RDP_PS_8GB;
6663                 break;
6664         case LPFC_LINK_SPEED_10GHZ:
6665                 rdp_speed = RDP_PS_10GB;
6666                 break;
6667         case LPFC_LINK_SPEED_16GHZ:
6668                 rdp_speed = RDP_PS_16GB;
6669                 break;
6670         case LPFC_LINK_SPEED_32GHZ:
6671                 rdp_speed = RDP_PS_32GB;
6672                 break;
6673         case LPFC_LINK_SPEED_64GHZ:
6674                 rdp_speed = RDP_PS_64GB;
6675                 break;
6676         case LPFC_LINK_SPEED_128GHZ:
6677                 rdp_speed = RDP_PS_128GB;
6678                 break;
6679         case LPFC_LINK_SPEED_256GHZ:
6680                 rdp_speed = RDP_PS_256GB;
6681                 break;
6682         default:
6683                 rdp_speed = RDP_PS_UNKNOWN;
6684                 break;
6685         }
6686
6687         desc->info.port_speed.speed = cpu_to_be16(rdp_speed);
6688
6689         if (phba->lmt & LMT_256Gb)
6690                 rdp_cap |= RDP_PS_256GB;
6691         if (phba->lmt & LMT_128Gb)
6692                 rdp_cap |= RDP_PS_128GB;
6693         if (phba->lmt & LMT_64Gb)
6694                 rdp_cap |= RDP_PS_64GB;
6695         if (phba->lmt & LMT_32Gb)
6696                 rdp_cap |= RDP_PS_32GB;
6697         if (phba->lmt & LMT_16Gb)
6698                 rdp_cap |= RDP_PS_16GB;
6699         if (phba->lmt & LMT_10Gb)
6700                 rdp_cap |= RDP_PS_10GB;
6701         if (phba->lmt & LMT_8Gb)
6702                 rdp_cap |= RDP_PS_8GB;
6703         if (phba->lmt & LMT_4Gb)
6704                 rdp_cap |= RDP_PS_4GB;
6705         if (phba->lmt & LMT_2Gb)
6706                 rdp_cap |= RDP_PS_2GB;
6707         if (phba->lmt & LMT_1Gb)
6708                 rdp_cap |= RDP_PS_1GB;
6709
6710         if (rdp_cap == 0)
6711                 rdp_cap = RDP_CAP_UNKNOWN;
6712         if (phba->cfg_link_speed != LPFC_USER_LINK_SPEED_AUTO)
6713                 rdp_cap |= RDP_CAP_USER_CONFIGURED;
6714
6715         desc->info.port_speed.capabilities = cpu_to_be16(rdp_cap);
6716         desc->length = cpu_to_be32(sizeof(desc->info));
6717         return sizeof(struct fc_rdp_port_speed_desc);
6718 }
6719
6720 static uint32_t
6721 lpfc_rdp_res_diag_port_names(struct fc_rdp_port_name_desc *desc,
6722                 struct lpfc_vport *vport)
6723 {
6724
6725         desc->tag = cpu_to_be32(RDP_PORT_NAMES_DESC_TAG);
6726
6727         memcpy(desc->port_names.wwnn, &vport->fc_nodename,
6728                         sizeof(desc->port_names.wwnn));
6729
6730         memcpy(desc->port_names.wwpn, &vport->fc_portname,
6731                         sizeof(desc->port_names.wwpn));
6732
6733         desc->length = cpu_to_be32(sizeof(desc->port_names));
6734         return sizeof(struct fc_rdp_port_name_desc);
6735 }
6736
6737 static uint32_t
6738 lpfc_rdp_res_attach_port_names(struct fc_rdp_port_name_desc *desc,
6739                 struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
6740 {
6741
6742         desc->tag = cpu_to_be32(RDP_PORT_NAMES_DESC_TAG);
6743         if (vport->fc_flag & FC_FABRIC) {
6744                 memcpy(desc->port_names.wwnn, &vport->fabric_nodename,
6745                        sizeof(desc->port_names.wwnn));
6746
6747                 memcpy(desc->port_names.wwpn, &vport->fabric_portname,
6748                        sizeof(desc->port_names.wwpn));
6749         } else {  /* Point to Point */
6750                 memcpy(desc->port_names.wwnn, &ndlp->nlp_nodename,
6751                        sizeof(desc->port_names.wwnn));
6752
6753                 memcpy(desc->port_names.wwpn, &ndlp->nlp_portname,
6754                        sizeof(desc->port_names.wwpn));
6755         }
6756
6757         desc->length = cpu_to_be32(sizeof(desc->port_names));
6758         return sizeof(struct fc_rdp_port_name_desc);
6759 }
6760
6761 static void
6762 lpfc_els_rdp_cmpl(struct lpfc_hba *phba, struct lpfc_rdp_context *rdp_context,
6763                 int status)
6764 {
6765         struct lpfc_nodelist *ndlp = rdp_context->ndlp;
6766         struct lpfc_vport *vport = ndlp->vport;
6767         struct lpfc_iocbq *elsiocb;
6768         struct ulp_bde64 *bpl;
6769         IOCB_t *icmd;
6770         uint8_t *pcmd;
6771         struct ls_rjt *stat;
6772         struct fc_rdp_res_frame *rdp_res;
6773         uint32_t cmdsize, len;
6774         uint16_t *flag_ptr;
6775         int rc;
6776
6777         if (status != SUCCESS)
6778                 goto error;
6779
6780         /* This will change once we know the true size of the RDP payload */
6781         cmdsize = sizeof(struct fc_rdp_res_frame);
6782
6783         elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize,
6784                         lpfc_max_els_tries, rdp_context->ndlp,
6785                         rdp_context->ndlp->nlp_DID, ELS_CMD_ACC);
6786         if (!elsiocb)
6787                 goto free_rdp_context;
6788
6789         icmd = &elsiocb->iocb;
6790         icmd->ulpContext = rdp_context->rx_id;
6791         icmd->unsli3.rcvsli3.ox_id = rdp_context->ox_id;
6792
6793         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
6794                         "2171 Xmit RDP response tag x%x xri x%x, "
6795                         "did x%x, nlp_flag x%x, nlp_state x%x, rpi x%x",
6796                         elsiocb->iotag, elsiocb->iocb.ulpContext,
6797                         ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
6798                         ndlp->nlp_rpi);
6799         rdp_res = (struct fc_rdp_res_frame *)
6800                 (((struct lpfc_dmabuf *) elsiocb->context2)->virt);
6801         pcmd = (uint8_t *) (((struct lpfc_dmabuf *) elsiocb->context2)->virt);
6802         memset(pcmd, 0, sizeof(struct fc_rdp_res_frame));
6803         *((uint32_t *) (pcmd)) = ELS_CMD_ACC;
6804
6805         /* Update Alarm and Warning */
6806         flag_ptr = (uint16_t *)(rdp_context->page_a2 + SSF_ALARM_FLAGS);
6807         phba->sfp_alarm |= *flag_ptr;
6808         flag_ptr = (uint16_t *)(rdp_context->page_a2 + SSF_WARNING_FLAGS);
6809         phba->sfp_warning |= *flag_ptr;
6810
6811         /* For RDP payload */
6812         len = 8;
6813         len += lpfc_rdp_res_link_service((struct fc_rdp_link_service_desc *)
6814                                          (len + pcmd), ELS_CMD_RDP);
6815
6816         len += lpfc_rdp_res_sfp_desc((struct fc_rdp_sfp_desc *)(len + pcmd),
6817                         rdp_context->page_a0, rdp_context->page_a2);
6818         len += lpfc_rdp_res_speed((struct fc_rdp_port_speed_desc *)(len + pcmd),
6819                                   phba);
6820         len += lpfc_rdp_res_link_error((struct fc_rdp_link_error_status_desc *)
6821                                        (len + pcmd), &rdp_context->link_stat);
6822         len += lpfc_rdp_res_diag_port_names((struct fc_rdp_port_name_desc *)
6823                                              (len + pcmd), vport);
6824         len += lpfc_rdp_res_attach_port_names((struct fc_rdp_port_name_desc *)
6825                                         (len + pcmd), vport, ndlp);
6826         len += lpfc_rdp_res_fec_desc((struct fc_fec_rdp_desc *)(len + pcmd),
6827                         &rdp_context->link_stat);
6828         len += lpfc_rdp_res_bbc_desc((struct fc_rdp_bbc_desc *)(len + pcmd),
6829                                      &rdp_context->link_stat, vport);
6830         len += lpfc_rdp_res_oed_temp_desc(phba,
6831                                 (struct fc_rdp_oed_sfp_desc *)(len + pcmd),
6832                                 rdp_context->page_a2);
6833         len += lpfc_rdp_res_oed_voltage_desc(phba,
6834                                 (struct fc_rdp_oed_sfp_desc *)(len + pcmd),
6835                                 rdp_context->page_a2);
6836         len += lpfc_rdp_res_oed_txbias_desc(phba,
6837                                 (struct fc_rdp_oed_sfp_desc *)(len + pcmd),
6838                                 rdp_context->page_a2);
6839         len += lpfc_rdp_res_oed_txpower_desc(phba,
6840                                 (struct fc_rdp_oed_sfp_desc *)(len + pcmd),
6841                                 rdp_context->page_a2);
6842         len += lpfc_rdp_res_oed_rxpower_desc(phba,
6843                                 (struct fc_rdp_oed_sfp_desc *)(len + pcmd),
6844                                 rdp_context->page_a2);
6845         len += lpfc_rdp_res_opd_desc((struct fc_rdp_opd_sfp_desc *)(len + pcmd),
6846                                      rdp_context->page_a0, vport);
6847
6848         rdp_res->length = cpu_to_be32(len - 8);
6849         elsiocb->iocb_cmpl = lpfc_cmpl_els_rsp;
6850
6851         /* Now that we know the true size of the payload, update the BPL */
6852         bpl = (struct ulp_bde64 *)
6853                 (((struct lpfc_dmabuf *)(elsiocb->context3))->virt);
6854         bpl->tus.f.bdeSize = len;
6855         bpl->tus.f.bdeFlags = 0;
6856         bpl->tus.w = le32_to_cpu(bpl->tus.w);
6857
6858         phba->fc_stat.elsXmitACC++;
6859         elsiocb->context1 = lpfc_nlp_get(ndlp);
6860         if (!elsiocb->context1) {
6861                 lpfc_els_free_iocb(phba, elsiocb);
6862                 goto free_rdp_context;
6863         }
6864
6865         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
6866         if (rc == IOCB_ERROR) {
6867                 lpfc_els_free_iocb(phba, elsiocb);
6868                 lpfc_nlp_put(ndlp);
6869         }
6870
6871         goto free_rdp_context;
6872
6873 error:
6874         cmdsize = 2 * sizeof(uint32_t);
6875         elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, lpfc_max_els_tries,
6876                         ndlp, ndlp->nlp_DID, ELS_CMD_LS_RJT);
6877         if (!elsiocb)
6878                 goto free_rdp_context;
6879
6880         icmd = &elsiocb->iocb;
6881         icmd->ulpContext = rdp_context->rx_id;
6882         icmd->unsli3.rcvsli3.ox_id = rdp_context->ox_id;
6883         pcmd = (uint8_t *) (((struct lpfc_dmabuf *) elsiocb->context2)->virt);
6884
6885         *((uint32_t *) (pcmd)) = ELS_CMD_LS_RJT;
6886         stat = (struct ls_rjt *)(pcmd + sizeof(uint32_t));
6887         stat->un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
6888
6889         phba->fc_stat.elsXmitLSRJT++;
6890         elsiocb->iocb_cmpl = lpfc_cmpl_els_rsp;
6891         elsiocb->context1 = lpfc_nlp_get(ndlp);
6892         if (!elsiocb->context1) {
6893                 lpfc_els_free_iocb(phba, elsiocb);
6894                 goto free_rdp_context;
6895         }
6896
6897         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
6898         if (rc == IOCB_ERROR) {
6899                 lpfc_els_free_iocb(phba, elsiocb);
6900                 lpfc_nlp_put(ndlp);
6901         }
6902
6903 free_rdp_context:
6904         /* This reference put is for the original unsolicited RDP. If the
6905          * iocb prep failed, there is no reference to remove.
6906          */
6907         lpfc_nlp_put(ndlp);
6908         kfree(rdp_context);
6909 }
6910
6911 static int
6912 lpfc_get_rdp_info(struct lpfc_hba *phba, struct lpfc_rdp_context *rdp_context)
6913 {
6914         LPFC_MBOXQ_t *mbox = NULL;
6915         struct lpfc_dmabuf *mp;
6916         int rc;
6917
6918         mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
6919         if (!mbox) {
6920                 lpfc_printf_log(phba, KERN_WARNING, LOG_MBOX | LOG_ELS,
6921                                 "7105 failed to allocate mailbox memory");
6922                 return 1;
6923         }
6924
6925         if (lpfc_sli4_dump_page_a0(phba, mbox))
6926                 goto prep_mbox_fail;
6927         mbox->vport = rdp_context->ndlp->vport;
6928         mbox->mbox_cmpl = lpfc_mbx_cmpl_rdp_page_a0;
6929         mbox->ctx_ndlp = (struct lpfc_rdp_context *)rdp_context;
6930         rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
6931         if (rc == MBX_NOT_FINISHED) {
6932                 mp = (struct lpfc_dmabuf *)mbox->ctx_buf;
6933                 lpfc_mbuf_free(phba, mp->virt, mp->phys);
6934                 goto issue_mbox_fail;
6935         }
6936
6937         return 0;
6938
6939 prep_mbox_fail:
6940 issue_mbox_fail:
6941         mempool_free(mbox, phba->mbox_mem_pool);
6942         return 1;
6943 }
6944
6945 /*
6946  * lpfc_els_rcv_rdp - Process an unsolicited RDP ELS.
6947  * @vport: pointer to a host virtual N_Port data structure.
6948  * @cmdiocb: pointer to lpfc command iocb data structure.
6949  * @ndlp: pointer to a node-list data structure.
6950  *
6951  * This routine processes an unsolicited RDP(Read Diagnostic Parameters)
6952  * IOCB. First, the payload of the unsolicited RDP is checked.
6953  * Then it will (1) send MBX_DUMP_MEMORY, Embedded DMP_LMSD sub command TYPE-3
6954  * for Page A0, (2) send MBX_DUMP_MEMORY, DMP_LMSD for Page A2,
6955  * (3) send MBX_READ_LNK_STAT to get link stat, (4) Call lpfc_els_rdp_cmpl
6956  * gather all data and send RDP response.
6957  *
6958  * Return code
6959  *   0 - Sent the acc response
6960  *   1 - Sent the reject response.
6961  */
6962 static int
6963 lpfc_els_rcv_rdp(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
6964                 struct lpfc_nodelist *ndlp)
6965 {
6966         struct lpfc_hba *phba = vport->phba;
6967         struct lpfc_dmabuf *pcmd;
6968         uint8_t rjt_err, rjt_expl = LSEXP_NOTHING_MORE;
6969         struct fc_rdp_req_frame *rdp_req;
6970         struct lpfc_rdp_context *rdp_context;
6971         IOCB_t *cmd = NULL;
6972         struct ls_rjt stat;
6973
6974         if (phba->sli_rev < LPFC_SLI_REV4 ||
6975             bf_get(lpfc_sli_intf_if_type, &phba->sli4_hba.sli_intf) <
6976                                                 LPFC_SLI_INTF_IF_TYPE_2) {
6977                 rjt_err = LSRJT_UNABLE_TPC;
6978                 rjt_expl = LSEXP_REQ_UNSUPPORTED;
6979                 goto error;
6980         }
6981
6982         if (phba->sli_rev < LPFC_SLI_REV4 || (phba->hba_flag & HBA_FCOE_MODE)) {
6983                 rjt_err = LSRJT_UNABLE_TPC;
6984                 rjt_expl = LSEXP_REQ_UNSUPPORTED;
6985                 goto error;
6986         }
6987
6988         pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
6989         rdp_req = (struct fc_rdp_req_frame *) pcmd->virt;
6990
6991         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
6992                          "2422 ELS RDP Request "
6993                          "dec len %d tag x%x port_id %d len %d\n",
6994                          be32_to_cpu(rdp_req->rdp_des_length),
6995                          be32_to_cpu(rdp_req->nport_id_desc.tag),
6996                          be32_to_cpu(rdp_req->nport_id_desc.nport_id),
6997                          be32_to_cpu(rdp_req->nport_id_desc.length));
6998
6999         if (sizeof(struct fc_rdp_nport_desc) !=
7000                         be32_to_cpu(rdp_req->rdp_des_length))
7001                 goto rjt_logerr;
7002         if (RDP_N_PORT_DESC_TAG != be32_to_cpu(rdp_req->nport_id_desc.tag))
7003                 goto rjt_logerr;
7004         if (RDP_NPORT_ID_SIZE !=
7005                         be32_to_cpu(rdp_req->nport_id_desc.length))
7006                 goto rjt_logerr;
7007         rdp_context = kzalloc(sizeof(struct lpfc_rdp_context), GFP_KERNEL);
7008         if (!rdp_context) {
7009                 rjt_err = LSRJT_UNABLE_TPC;
7010                 goto error;
7011         }
7012
7013         cmd = &cmdiocb->iocb;
7014         rdp_context->ndlp = lpfc_nlp_get(ndlp);
7015         if (!rdp_context->ndlp) {
7016                 kfree(rdp_context);
7017                 rjt_err = LSRJT_UNABLE_TPC;
7018                 goto error;
7019         }
7020         rdp_context->ox_id = cmd->unsli3.rcvsli3.ox_id;
7021         rdp_context->rx_id = cmd->ulpContext;
7022         rdp_context->cmpl = lpfc_els_rdp_cmpl;
7023         if (lpfc_get_rdp_info(phba, rdp_context)) {
7024                 lpfc_printf_vlog(ndlp->vport, KERN_WARNING, LOG_ELS,
7025                                  "2423 Unable to send mailbox");
7026                 kfree(rdp_context);
7027                 rjt_err = LSRJT_UNABLE_TPC;
7028                 lpfc_nlp_put(ndlp);
7029                 goto error;
7030         }
7031
7032         return 0;
7033
7034 rjt_logerr:
7035         rjt_err = LSRJT_LOGICAL_ERR;
7036
7037 error:
7038         memset(&stat, 0, sizeof(stat));
7039         stat.un.b.lsRjtRsnCode = rjt_err;
7040         stat.un.b.lsRjtRsnCodeExp = rjt_expl;
7041         lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
7042         return 1;
7043 }
7044
7045
7046 static void
7047 lpfc_els_lcb_rsp(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
7048 {
7049         MAILBOX_t *mb;
7050         IOCB_t *icmd;
7051         uint8_t *pcmd;
7052         struct lpfc_iocbq *elsiocb;
7053         struct lpfc_nodelist *ndlp;
7054         struct ls_rjt *stat;
7055         union lpfc_sli4_cfg_shdr *shdr;
7056         struct lpfc_lcb_context *lcb_context;
7057         struct fc_lcb_res_frame *lcb_res;
7058         uint32_t cmdsize, shdr_status, shdr_add_status;
7059         int rc;
7060
7061         mb = &pmb->u.mb;
7062         lcb_context = (struct lpfc_lcb_context *)pmb->ctx_ndlp;
7063         ndlp = lcb_context->ndlp;
7064         pmb->ctx_ndlp = NULL;
7065         pmb->ctx_buf = NULL;
7066
7067         shdr = (union lpfc_sli4_cfg_shdr *)
7068                         &pmb->u.mqe.un.beacon_config.header.cfg_shdr;
7069         shdr_status = bf_get(lpfc_mbox_hdr_status, &shdr->response);
7070         shdr_add_status = bf_get(lpfc_mbox_hdr_add_status, &shdr->response);
7071
7072         lpfc_printf_log(phba, KERN_INFO, LOG_MBOX,
7073                                 "0194 SET_BEACON_CONFIG mailbox "
7074                                 "completed with status x%x add_status x%x,"
7075                                 " mbx status x%x\n",
7076                                 shdr_status, shdr_add_status, mb->mbxStatus);
7077
7078         if ((mb->mbxStatus != MBX_SUCCESS) || shdr_status ||
7079             (shdr_add_status == ADD_STATUS_OPERATION_ALREADY_ACTIVE) ||
7080             (shdr_add_status == ADD_STATUS_INVALID_REQUEST)) {
7081                 mempool_free(pmb, phba->mbox_mem_pool);
7082                 goto error;
7083         }
7084
7085         mempool_free(pmb, phba->mbox_mem_pool);
7086         cmdsize = sizeof(struct fc_lcb_res_frame);
7087         elsiocb = lpfc_prep_els_iocb(phba->pport, 0, cmdsize,
7088                         lpfc_max_els_tries, ndlp,
7089                         ndlp->nlp_DID, ELS_CMD_ACC);
7090
7091         /* Decrement the ndlp reference count from previous mbox command */
7092         lpfc_nlp_put(ndlp);
7093
7094         if (!elsiocb)
7095                 goto free_lcb_context;
7096
7097         lcb_res = (struct fc_lcb_res_frame *)
7098                 (((struct lpfc_dmabuf *)elsiocb->context2)->virt);
7099
7100         memset(lcb_res, 0, sizeof(struct fc_lcb_res_frame));
7101         icmd = &elsiocb->iocb;
7102         icmd->ulpContext = lcb_context->rx_id;
7103         icmd->unsli3.rcvsli3.ox_id = lcb_context->ox_id;
7104
7105         pcmd = (uint8_t *)(((struct lpfc_dmabuf *)elsiocb->context2)->virt);
7106         *((uint32_t *)(pcmd)) = ELS_CMD_ACC;
7107         lcb_res->lcb_sub_command = lcb_context->sub_command;
7108         lcb_res->lcb_type = lcb_context->type;
7109         lcb_res->capability = lcb_context->capability;
7110         lcb_res->lcb_frequency = lcb_context->frequency;
7111         lcb_res->lcb_duration = lcb_context->duration;
7112         elsiocb->iocb_cmpl = lpfc_cmpl_els_rsp;
7113         phba->fc_stat.elsXmitACC++;
7114
7115         elsiocb->context1 = lpfc_nlp_get(ndlp);
7116         if (!elsiocb->context1) {
7117                 lpfc_els_free_iocb(phba, elsiocb);
7118                 goto out;
7119         }
7120
7121         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
7122         if (rc == IOCB_ERROR) {
7123                 lpfc_els_free_iocb(phba, elsiocb);
7124                 lpfc_nlp_put(ndlp);
7125         }
7126  out:
7127         kfree(lcb_context);
7128         return;
7129
7130 error:
7131         cmdsize = sizeof(struct fc_lcb_res_frame);
7132         elsiocb = lpfc_prep_els_iocb(phba->pport, 0, cmdsize,
7133                         lpfc_max_els_tries, ndlp,
7134                         ndlp->nlp_DID, ELS_CMD_LS_RJT);
7135         lpfc_nlp_put(ndlp);
7136         if (!elsiocb)
7137                 goto free_lcb_context;
7138
7139         icmd = &elsiocb->iocb;
7140         icmd->ulpContext = lcb_context->rx_id;
7141         icmd->unsli3.rcvsli3.ox_id = lcb_context->ox_id;
7142         pcmd = (uint8_t *)(((struct lpfc_dmabuf *)elsiocb->context2)->virt);
7143
7144         *((uint32_t *)(pcmd)) = ELS_CMD_LS_RJT;
7145         stat = (struct ls_rjt *)(pcmd + sizeof(uint32_t));
7146         stat->un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
7147
7148         if (shdr_add_status == ADD_STATUS_OPERATION_ALREADY_ACTIVE)
7149                 stat->un.b.lsRjtRsnCodeExp = LSEXP_CMD_IN_PROGRESS;
7150
7151         elsiocb->iocb_cmpl = lpfc_cmpl_els_rsp;
7152         phba->fc_stat.elsXmitLSRJT++;
7153         elsiocb->context1 = lpfc_nlp_get(ndlp);
7154         if (!elsiocb->context1) {
7155                 lpfc_els_free_iocb(phba, elsiocb);
7156                 goto free_lcb_context;
7157         }
7158
7159         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
7160         if (rc == IOCB_ERROR) {
7161                 lpfc_els_free_iocb(phba, elsiocb);
7162                 lpfc_nlp_put(ndlp);
7163         }
7164 free_lcb_context:
7165         kfree(lcb_context);
7166 }
7167
7168 static int
7169 lpfc_sli4_set_beacon(struct lpfc_vport *vport,
7170                      struct lpfc_lcb_context *lcb_context,
7171                      uint32_t beacon_state)
7172 {
7173         struct lpfc_hba *phba = vport->phba;
7174         union lpfc_sli4_cfg_shdr *cfg_shdr;
7175         LPFC_MBOXQ_t *mbox = NULL;
7176         uint32_t len;
7177         int rc;
7178
7179         mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
7180         if (!mbox)
7181                 return 1;
7182
7183         cfg_shdr = &mbox->u.mqe.un.sli4_config.header.cfg_shdr;
7184         len = sizeof(struct lpfc_mbx_set_beacon_config) -
7185                 sizeof(struct lpfc_sli4_cfg_mhdr);
7186         lpfc_sli4_config(phba, mbox, LPFC_MBOX_SUBSYSTEM_COMMON,
7187                          LPFC_MBOX_OPCODE_SET_BEACON_CONFIG, len,
7188                          LPFC_SLI4_MBX_EMBED);
7189         mbox->ctx_ndlp = (void *)lcb_context;
7190         mbox->vport = phba->pport;
7191         mbox->mbox_cmpl = lpfc_els_lcb_rsp;
7192         bf_set(lpfc_mbx_set_beacon_port_num, &mbox->u.mqe.un.beacon_config,
7193                phba->sli4_hba.physical_port);
7194         bf_set(lpfc_mbx_set_beacon_state, &mbox->u.mqe.un.beacon_config,
7195                beacon_state);
7196         mbox->u.mqe.un.beacon_config.word5 = 0;         /* Reserved */
7197
7198         /*
7199          *      Check bv1s bit before issuing the mailbox
7200          *      if bv1s == 1, LCB V1 supported
7201          *      else, LCB V0 supported
7202          */
7203
7204         if (phba->sli4_hba.pc_sli4_params.bv1s) {
7205                 /* COMMON_SET_BEACON_CONFIG_V1 */
7206                 cfg_shdr->request.word9 = BEACON_VERSION_V1;
7207                 lcb_context->capability |= LCB_CAPABILITY_DURATION;
7208                 bf_set(lpfc_mbx_set_beacon_port_type,
7209                        &mbox->u.mqe.un.beacon_config, 0);
7210                 bf_set(lpfc_mbx_set_beacon_duration_v1,
7211                        &mbox->u.mqe.un.beacon_config,
7212                        be16_to_cpu(lcb_context->duration));
7213         } else {
7214                 /* COMMON_SET_BEACON_CONFIG_V0 */
7215                 if (be16_to_cpu(lcb_context->duration) != 0) {
7216                         mempool_free(mbox, phba->mbox_mem_pool);
7217                         return 1;
7218                 }
7219                 cfg_shdr->request.word9 = BEACON_VERSION_V0;
7220                 lcb_context->capability &=  ~(LCB_CAPABILITY_DURATION);
7221                 bf_set(lpfc_mbx_set_beacon_state,
7222                        &mbox->u.mqe.un.beacon_config, beacon_state);
7223                 bf_set(lpfc_mbx_set_beacon_port_type,
7224                        &mbox->u.mqe.un.beacon_config, 1);
7225                 bf_set(lpfc_mbx_set_beacon_duration,
7226                        &mbox->u.mqe.un.beacon_config,
7227                        be16_to_cpu(lcb_context->duration));
7228         }
7229
7230         rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
7231         if (rc == MBX_NOT_FINISHED) {
7232                 mempool_free(mbox, phba->mbox_mem_pool);
7233                 return 1;
7234         }
7235
7236         return 0;
7237 }
7238
7239
7240 /**
7241  * lpfc_els_rcv_lcb - Process an unsolicited LCB
7242  * @vport: pointer to a host virtual N_Port data structure.
7243  * @cmdiocb: pointer to lpfc command iocb data structure.
7244  * @ndlp: pointer to a node-list data structure.
7245  *
7246  * This routine processes an unsolicited LCB(LINK CABLE BEACON) IOCB.
7247  * First, the payload of the unsolicited LCB is checked.
7248  * Then based on Subcommand beacon will either turn on or off.
7249  *
7250  * Return code
7251  * 0 - Sent the acc response
7252  * 1 - Sent the reject response.
7253  **/
7254 static int
7255 lpfc_els_rcv_lcb(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
7256                  struct lpfc_nodelist *ndlp)
7257 {
7258         struct lpfc_hba *phba = vport->phba;
7259         struct lpfc_dmabuf *pcmd;
7260         uint8_t *lp;
7261         struct fc_lcb_request_frame *beacon;
7262         struct lpfc_lcb_context *lcb_context;
7263         u8 state, rjt_err = 0;
7264         struct ls_rjt stat;
7265
7266         pcmd = (struct lpfc_dmabuf *)cmdiocb->context2;
7267         lp = (uint8_t *)pcmd->virt;
7268         beacon = (struct fc_lcb_request_frame *)pcmd->virt;
7269
7270         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
7271                         "0192 ELS LCB Data x%x x%x x%x x%x sub x%x "
7272                         "type x%x frequency %x duration x%x\n",
7273                         lp[0], lp[1], lp[2],
7274                         beacon->lcb_command,
7275                         beacon->lcb_sub_command,
7276                         beacon->lcb_type,
7277                         beacon->lcb_frequency,
7278                         be16_to_cpu(beacon->lcb_duration));
7279
7280         if (beacon->lcb_sub_command != LPFC_LCB_ON &&
7281             beacon->lcb_sub_command != LPFC_LCB_OFF) {
7282                 rjt_err = LSRJT_CMD_UNSUPPORTED;
7283                 goto rjt;
7284         }
7285
7286         if (phba->sli_rev < LPFC_SLI_REV4  ||
7287             phba->hba_flag & HBA_FCOE_MODE ||
7288             (bf_get(lpfc_sli_intf_if_type, &phba->sli4_hba.sli_intf) <
7289             LPFC_SLI_INTF_IF_TYPE_2)) {
7290                 rjt_err = LSRJT_CMD_UNSUPPORTED;
7291                 goto rjt;
7292         }
7293
7294         lcb_context = kmalloc(sizeof(*lcb_context), GFP_KERNEL);
7295         if (!lcb_context) {
7296                 rjt_err = LSRJT_UNABLE_TPC;
7297                 goto rjt;
7298         }
7299
7300         state = (beacon->lcb_sub_command == LPFC_LCB_ON) ? 1 : 0;
7301         lcb_context->sub_command = beacon->lcb_sub_command;
7302         lcb_context->capability = 0;
7303         lcb_context->type = beacon->lcb_type;
7304         lcb_context->frequency = beacon->lcb_frequency;
7305         lcb_context->duration = beacon->lcb_duration;
7306         lcb_context->ox_id = cmdiocb->iocb.unsli3.rcvsli3.ox_id;
7307         lcb_context->rx_id = cmdiocb->iocb.ulpContext;
7308         lcb_context->ndlp = lpfc_nlp_get(ndlp);
7309         if (!lcb_context->ndlp) {
7310                 rjt_err = LSRJT_UNABLE_TPC;
7311                 goto rjt_free;
7312         }
7313
7314         if (lpfc_sli4_set_beacon(vport, lcb_context, state)) {
7315                 lpfc_printf_vlog(ndlp->vport, KERN_ERR, LOG_TRACE_EVENT,
7316                                  "0193 failed to send mail box");
7317                 lpfc_nlp_put(ndlp);
7318                 rjt_err = LSRJT_UNABLE_TPC;
7319                 goto rjt_free;
7320         }
7321         return 0;
7322
7323 rjt_free:
7324         kfree(lcb_context);
7325 rjt:
7326         memset(&stat, 0, sizeof(stat));
7327         stat.un.b.lsRjtRsnCode = rjt_err;
7328         lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
7329         return 1;
7330 }
7331
7332
7333 /**
7334  * lpfc_els_flush_rscn - Clean up any rscn activities with a vport
7335  * @vport: pointer to a host virtual N_Port data structure.
7336  *
7337  * This routine cleans up any Registration State Change Notification
7338  * (RSCN) activity with a @vport. Note that the fc_rscn_flush flag of the
7339  * @vport together with the host_lock is used to prevent multiple thread
7340  * trying to access the RSCN array on a same @vport at the same time.
7341  **/
7342 void
7343 lpfc_els_flush_rscn(struct lpfc_vport *vport)
7344 {
7345         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
7346         struct lpfc_hba  *phba = vport->phba;
7347         int i;
7348
7349         spin_lock_irq(shost->host_lock);
7350         if (vport->fc_rscn_flush) {
7351                 /* Another thread is walking fc_rscn_id_list on this vport */
7352                 spin_unlock_irq(shost->host_lock);
7353                 return;
7354         }
7355         /* Indicate we are walking lpfc_els_flush_rscn on this vport */
7356         vport->fc_rscn_flush = 1;
7357         spin_unlock_irq(shost->host_lock);
7358
7359         for (i = 0; i < vport->fc_rscn_id_cnt; i++) {
7360                 lpfc_in_buf_free(phba, vport->fc_rscn_id_list[i]);
7361                 vport->fc_rscn_id_list[i] = NULL;
7362         }
7363         spin_lock_irq(shost->host_lock);
7364         vport->fc_rscn_id_cnt = 0;
7365         vport->fc_flag &= ~(FC_RSCN_MODE | FC_RSCN_DISCOVERY);
7366         spin_unlock_irq(shost->host_lock);
7367         lpfc_can_disctmo(vport);
7368         /* Indicate we are done walking this fc_rscn_id_list */
7369         vport->fc_rscn_flush = 0;
7370 }
7371
7372 /**
7373  * lpfc_rscn_payload_check - Check whether there is a pending rscn to a did
7374  * @vport: pointer to a host virtual N_Port data structure.
7375  * @did: remote destination port identifier.
7376  *
7377  * This routine checks whether there is any pending Registration State
7378  * Configuration Notification (RSCN) to a @did on @vport.
7379  *
7380  * Return code
7381  *   None zero - The @did matched with a pending rscn
7382  *   0 - not able to match @did with a pending rscn
7383  **/
7384 int
7385 lpfc_rscn_payload_check(struct lpfc_vport *vport, uint32_t did)
7386 {
7387         D_ID ns_did;
7388         D_ID rscn_did;
7389         uint32_t *lp;
7390         uint32_t payload_len, i;
7391         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
7392
7393         ns_did.un.word = did;
7394
7395         /* Never match fabric nodes for RSCNs */
7396         if ((did & Fabric_DID_MASK) == Fabric_DID_MASK)
7397                 return 0;
7398
7399         /* If we are doing a FULL RSCN rediscovery, match everything */
7400         if (vport->fc_flag & FC_RSCN_DISCOVERY)
7401                 return did;
7402
7403         spin_lock_irq(shost->host_lock);
7404         if (vport->fc_rscn_flush) {
7405                 /* Another thread is walking fc_rscn_id_list on this vport */
7406                 spin_unlock_irq(shost->host_lock);
7407                 return 0;
7408         }
7409         /* Indicate we are walking fc_rscn_id_list on this vport */
7410         vport->fc_rscn_flush = 1;
7411         spin_unlock_irq(shost->host_lock);
7412         for (i = 0; i < vport->fc_rscn_id_cnt; i++) {
7413                 lp = vport->fc_rscn_id_list[i]->virt;
7414                 payload_len = be32_to_cpu(*lp++ & ~ELS_CMD_MASK);
7415                 payload_len -= sizeof(uint32_t);        /* take off word 0 */
7416                 while (payload_len) {
7417                         rscn_did.un.word = be32_to_cpu(*lp++);
7418                         payload_len -= sizeof(uint32_t);
7419                         switch (rscn_did.un.b.resv & RSCN_ADDRESS_FORMAT_MASK) {
7420                         case RSCN_ADDRESS_FORMAT_PORT:
7421                                 if ((ns_did.un.b.domain == rscn_did.un.b.domain)
7422                                     && (ns_did.un.b.area == rscn_did.un.b.area)
7423                                     && (ns_did.un.b.id == rscn_did.un.b.id))
7424                                         goto return_did_out;
7425                                 break;
7426                         case RSCN_ADDRESS_FORMAT_AREA:
7427                                 if ((ns_did.un.b.domain == rscn_did.un.b.domain)
7428                                     && (ns_did.un.b.area == rscn_did.un.b.area))
7429                                         goto return_did_out;
7430                                 break;
7431                         case RSCN_ADDRESS_FORMAT_DOMAIN:
7432                                 if (ns_did.un.b.domain == rscn_did.un.b.domain)
7433                                         goto return_did_out;
7434                                 break;
7435                         case RSCN_ADDRESS_FORMAT_FABRIC:
7436                                 goto return_did_out;
7437                         }
7438                 }
7439         }
7440         /* Indicate we are done with walking fc_rscn_id_list on this vport */
7441         vport->fc_rscn_flush = 0;
7442         return 0;
7443 return_did_out:
7444         /* Indicate we are done with walking fc_rscn_id_list on this vport */
7445         vport->fc_rscn_flush = 0;
7446         return did;
7447 }
7448
7449 /**
7450  * lpfc_rscn_recovery_check - Send recovery event to vport nodes matching rscn
7451  * @vport: pointer to a host virtual N_Port data structure.
7452  *
7453  * This routine sends recovery (NLP_EVT_DEVICE_RECOVERY) event to the
7454  * state machine for a @vport's nodes that are with pending RSCN (Registration
7455  * State Change Notification).
7456  *
7457  * Return code
7458  *   0 - Successful (currently alway return 0)
7459  **/
7460 static int
7461 lpfc_rscn_recovery_check(struct lpfc_vport *vport)
7462 {
7463         struct lpfc_nodelist *ndlp = NULL;
7464
7465         /* Move all affected nodes by pending RSCNs to NPR state. */
7466         list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
7467                 if ((ndlp->nlp_state == NLP_STE_UNUSED_NODE) ||
7468                     !lpfc_rscn_payload_check(vport, ndlp->nlp_DID))
7469                         continue;
7470
7471                 /* NVME Target mode does not do RSCN Recovery. */
7472                 if (vport->phba->nvmet_support)
7473                         continue;
7474
7475                 /* If we are in the process of doing discovery on this
7476                  * NPort, let it continue on its own.
7477                  */
7478                 switch (ndlp->nlp_state) {
7479                 case  NLP_STE_PLOGI_ISSUE:
7480                 case  NLP_STE_ADISC_ISSUE:
7481                 case  NLP_STE_REG_LOGIN_ISSUE:
7482                 case  NLP_STE_PRLI_ISSUE:
7483                 case  NLP_STE_LOGO_ISSUE:
7484                         continue;
7485                 }
7486
7487                 lpfc_disc_state_machine(vport, ndlp, NULL,
7488                                         NLP_EVT_DEVICE_RECOVERY);
7489                 lpfc_cancel_retry_delay_tmo(vport, ndlp);
7490         }
7491         return 0;
7492 }
7493
7494 /**
7495  * lpfc_send_rscn_event - Send an RSCN event to management application
7496  * @vport: pointer to a host virtual N_Port data structure.
7497  * @cmdiocb: pointer to lpfc command iocb data structure.
7498  *
7499  * lpfc_send_rscn_event sends an RSCN netlink event to management
7500  * applications.
7501  */
7502 static void
7503 lpfc_send_rscn_event(struct lpfc_vport *vport,
7504                 struct lpfc_iocbq *cmdiocb)
7505 {
7506         struct lpfc_dmabuf *pcmd;
7507         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
7508         uint32_t *payload_ptr;
7509         uint32_t payload_len;
7510         struct lpfc_rscn_event_header *rscn_event_data;
7511
7512         pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
7513         payload_ptr = (uint32_t *) pcmd->virt;
7514         payload_len = be32_to_cpu(*payload_ptr & ~ELS_CMD_MASK);
7515
7516         rscn_event_data = kmalloc(sizeof(struct lpfc_rscn_event_header) +
7517                 payload_len, GFP_KERNEL);
7518         if (!rscn_event_data) {
7519                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
7520                         "0147 Failed to allocate memory for RSCN event\n");
7521                 return;
7522         }
7523         rscn_event_data->event_type = FC_REG_RSCN_EVENT;
7524         rscn_event_data->payload_length = payload_len;
7525         memcpy(rscn_event_data->rscn_payload, payload_ptr,
7526                 payload_len);
7527
7528         fc_host_post_vendor_event(shost,
7529                 fc_get_event_number(),
7530                 sizeof(struct lpfc_rscn_event_header) + payload_len,
7531                 (char *)rscn_event_data,
7532                 LPFC_NL_VENDOR_ID);
7533
7534         kfree(rscn_event_data);
7535 }
7536
7537 /**
7538  * lpfc_els_rcv_rscn - Process an unsolicited rscn iocb
7539  * @vport: pointer to a host virtual N_Port data structure.
7540  * @cmdiocb: pointer to lpfc command iocb data structure.
7541  * @ndlp: pointer to a node-list data structure.
7542  *
7543  * This routine processes an unsolicited RSCN (Registration State Change
7544  * Notification) IOCB. First, the payload of the unsolicited RSCN is walked
7545  * to invoke fc_host_post_event() routine to the FC transport layer. If the
7546  * discover state machine is about to begin discovery, it just accepts the
7547  * RSCN and the discovery process will satisfy the RSCN. If this RSCN only
7548  * contains N_Port IDs for other vports on this HBA, it just accepts the
7549  * RSCN and ignore processing it. If the state machine is in the recovery
7550  * state, the fc_rscn_id_list of this @vport is walked and the
7551  * lpfc_rscn_recovery_check() routine is invoked to send recovery event for
7552  * all nodes that match RSCN payload. Otherwise, the lpfc_els_handle_rscn()
7553  * routine is invoked to handle the RSCN event.
7554  *
7555  * Return code
7556  *   0 - Just sent the acc response
7557  *   1 - Sent the acc response and waited for name server completion
7558  **/
7559 static int
7560 lpfc_els_rcv_rscn(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
7561                   struct lpfc_nodelist *ndlp)
7562 {
7563         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
7564         struct lpfc_hba  *phba = vport->phba;
7565         struct lpfc_dmabuf *pcmd;
7566         uint32_t *lp, *datap;
7567         uint32_t payload_len, length, nportid, *cmd;
7568         int rscn_cnt;
7569         int rscn_id = 0, hba_id = 0;
7570         int i, tmo;
7571
7572         pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
7573         lp = (uint32_t *) pcmd->virt;
7574
7575         payload_len = be32_to_cpu(*lp++ & ~ELS_CMD_MASK);
7576         payload_len -= sizeof(uint32_t);        /* take off word 0 */
7577         /* RSCN received */
7578         lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
7579                          "0214 RSCN received Data: x%x x%x x%x x%x\n",
7580                          vport->fc_flag, payload_len, *lp,
7581                          vport->fc_rscn_id_cnt);
7582
7583         /* Send an RSCN event to the management application */
7584         lpfc_send_rscn_event(vport, cmdiocb);
7585
7586         for (i = 0; i < payload_len/sizeof(uint32_t); i++)
7587                 fc_host_post_event(shost, fc_get_event_number(),
7588                         FCH_EVT_RSCN, lp[i]);
7589
7590         /* Check if RSCN is coming from a direct-connected remote NPort */
7591         if (vport->fc_flag & FC_PT2PT) {
7592                 /* If so, just ACC it, no other action needed for now */
7593                 lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
7594                                  "2024 pt2pt RSCN %08x Data: x%x x%x\n",
7595                                  *lp, vport->fc_flag, payload_len);
7596                 lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
7597
7598                 /* Check to see if we need to NVME rescan this target
7599                  * remoteport.
7600                  */
7601                 if (ndlp->nlp_fc4_type & NLP_FC4_NVME &&
7602                     ndlp->nlp_type & (NLP_NVME_TARGET | NLP_NVME_DISCOVERY))
7603                         lpfc_nvme_rescan_port(vport, ndlp);
7604                 return 0;
7605         }
7606
7607         /* If we are about to begin discovery, just ACC the RSCN.
7608          * Discovery processing will satisfy it.
7609          */
7610         if (vport->port_state <= LPFC_NS_QRY) {
7611                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
7612                         "RCV RSCN ignore: did:x%x/ste:x%x flg:x%x",
7613                         ndlp->nlp_DID, vport->port_state, ndlp->nlp_flag);
7614
7615                 lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
7616                 return 0;
7617         }
7618
7619         /* If this RSCN just contains NPortIDs for other vports on this HBA,
7620          * just ACC and ignore it.
7621          */
7622         if ((phba->sli3_options & LPFC_SLI3_NPIV_ENABLED) &&
7623                 !(vport->cfg_peer_port_login)) {
7624                 i = payload_len;
7625                 datap = lp;
7626                 while (i > 0) {
7627                         nportid = *datap++;
7628                         nportid = ((be32_to_cpu(nportid)) & Mask_DID);
7629                         i -= sizeof(uint32_t);
7630                         rscn_id++;
7631                         if (lpfc_find_vport_by_did(phba, nportid))
7632                                 hba_id++;
7633                 }
7634                 if (rscn_id == hba_id) {
7635                         /* ALL NPortIDs in RSCN are on HBA */
7636                         lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
7637                                          "0219 Ignore RSCN "
7638                                          "Data: x%x x%x x%x x%x\n",
7639                                          vport->fc_flag, payload_len,
7640                                          *lp, vport->fc_rscn_id_cnt);
7641                         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
7642                                 "RCV RSCN vport:  did:x%x/ste:x%x flg:x%x",
7643                                 ndlp->nlp_DID, vport->port_state,
7644                                 ndlp->nlp_flag);
7645
7646                         lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb,
7647                                 ndlp, NULL);
7648                         return 0;
7649                 }
7650         }
7651
7652         spin_lock_irq(shost->host_lock);
7653         if (vport->fc_rscn_flush) {
7654                 /* Another thread is walking fc_rscn_id_list on this vport */
7655                 vport->fc_flag |= FC_RSCN_DISCOVERY;
7656                 spin_unlock_irq(shost->host_lock);
7657                 /* Send back ACC */
7658                 lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
7659                 return 0;
7660         }
7661         /* Indicate we are walking fc_rscn_id_list on this vport */
7662         vport->fc_rscn_flush = 1;
7663         spin_unlock_irq(shost->host_lock);
7664         /* Get the array count after successfully have the token */
7665         rscn_cnt = vport->fc_rscn_id_cnt;
7666         /* If we are already processing an RSCN, save the received
7667          * RSCN payload buffer, cmdiocb->context2 to process later.
7668          */
7669         if (vport->fc_flag & (FC_RSCN_MODE | FC_NDISC_ACTIVE)) {
7670                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
7671                         "RCV RSCN defer:  did:x%x/ste:x%x flg:x%x",
7672                         ndlp->nlp_DID, vport->port_state, ndlp->nlp_flag);
7673
7674                 spin_lock_irq(shost->host_lock);
7675                 vport->fc_flag |= FC_RSCN_DEFERRED;
7676
7677                 /* Restart disctmo if its already running */
7678                 if (vport->fc_flag & FC_DISC_TMO) {
7679                         tmo = ((phba->fc_ratov * 3) + 3);
7680                         mod_timer(&vport->fc_disctmo,
7681                                   jiffies + msecs_to_jiffies(1000 * tmo));
7682                 }
7683                 if ((rscn_cnt < FC_MAX_HOLD_RSCN) &&
7684                     !(vport->fc_flag & FC_RSCN_DISCOVERY)) {
7685                         vport->fc_flag |= FC_RSCN_MODE;
7686                         spin_unlock_irq(shost->host_lock);
7687                         if (rscn_cnt) {
7688                                 cmd = vport->fc_rscn_id_list[rscn_cnt-1]->virt;
7689                                 length = be32_to_cpu(*cmd & ~ELS_CMD_MASK);
7690                         }
7691                         if ((rscn_cnt) &&
7692                             (payload_len + length <= LPFC_BPL_SIZE)) {
7693                                 *cmd &= ELS_CMD_MASK;
7694                                 *cmd |= cpu_to_be32(payload_len + length);
7695                                 memcpy(((uint8_t *)cmd) + length, lp,
7696                                        payload_len);
7697                         } else {
7698                                 vport->fc_rscn_id_list[rscn_cnt] = pcmd;
7699                                 vport->fc_rscn_id_cnt++;
7700                                 /* If we zero, cmdiocb->context2, the calling
7701                                  * routine will not try to free it.
7702                                  */
7703                                 cmdiocb->context2 = NULL;
7704                         }
7705                         /* Deferred RSCN */
7706                         lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
7707                                          "0235 Deferred RSCN "
7708                                          "Data: x%x x%x x%x\n",
7709                                          vport->fc_rscn_id_cnt, vport->fc_flag,
7710                                          vport->port_state);
7711                 } else {
7712                         vport->fc_flag |= FC_RSCN_DISCOVERY;
7713                         spin_unlock_irq(shost->host_lock);
7714                         /* ReDiscovery RSCN */
7715                         lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
7716                                          "0234 ReDiscovery RSCN "
7717                                          "Data: x%x x%x x%x\n",
7718                                          vport->fc_rscn_id_cnt, vport->fc_flag,
7719                                          vport->port_state);
7720                 }
7721                 /* Indicate we are done walking fc_rscn_id_list on this vport */
7722                 vport->fc_rscn_flush = 0;
7723                 /* Send back ACC */
7724                 lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
7725                 /* send RECOVERY event for ALL nodes that match RSCN payload */
7726                 lpfc_rscn_recovery_check(vport);
7727                 return 0;
7728         }
7729         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
7730                 "RCV RSCN:        did:x%x/ste:x%x flg:x%x",
7731                 ndlp->nlp_DID, vport->port_state, ndlp->nlp_flag);
7732
7733         spin_lock_irq(shost->host_lock);
7734         vport->fc_flag |= FC_RSCN_MODE;
7735         spin_unlock_irq(shost->host_lock);
7736         vport->fc_rscn_id_list[vport->fc_rscn_id_cnt++] = pcmd;
7737         /* Indicate we are done walking fc_rscn_id_list on this vport */
7738         vport->fc_rscn_flush = 0;
7739         /*
7740          * If we zero, cmdiocb->context2, the calling routine will
7741          * not try to free it.
7742          */
7743         cmdiocb->context2 = NULL;
7744         lpfc_set_disctmo(vport);
7745         /* Send back ACC */
7746         lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
7747         /* send RECOVERY event for ALL nodes that match RSCN payload */
7748         lpfc_rscn_recovery_check(vport);
7749         return lpfc_els_handle_rscn(vport);
7750 }
7751
7752 /**
7753  * lpfc_els_handle_rscn - Handle rscn for a vport
7754  * @vport: pointer to a host virtual N_Port data structure.
7755  *
7756  * This routine handles the Registration State Configuration Notification
7757  * (RSCN) for a @vport. If login to NameServer does not exist, a new ndlp shall
7758  * be created and a Port Login (PLOGI) to the NameServer is issued. Otherwise,
7759  * if the ndlp to NameServer exists, a Common Transport (CT) command to the
7760  * NameServer shall be issued. If CT command to the NameServer fails to be
7761  * issued, the lpfc_els_flush_rscn() routine shall be invoked to clean up any
7762  * RSCN activities with the @vport.
7763  *
7764  * Return code
7765  *   0 - Cleaned up rscn on the @vport
7766  *   1 - Wait for plogi to name server before proceed
7767  **/
7768 int
7769 lpfc_els_handle_rscn(struct lpfc_vport *vport)
7770 {
7771         struct lpfc_nodelist *ndlp;
7772         struct lpfc_hba  *phba = vport->phba;
7773
7774         /* Ignore RSCN if the port is being torn down. */
7775         if (vport->load_flag & FC_UNLOADING) {
7776                 lpfc_els_flush_rscn(vport);
7777                 return 0;
7778         }
7779
7780         /* Start timer for RSCN processing */
7781         lpfc_set_disctmo(vport);
7782
7783         /* RSCN processed */
7784         lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
7785                          "0215 RSCN processed Data: x%x x%x x%x x%x x%x x%x\n",
7786                          vport->fc_flag, 0, vport->fc_rscn_id_cnt,
7787                          vport->port_state, vport->num_disc_nodes,
7788                          vport->gidft_inp);
7789
7790         /* To process RSCN, first compare RSCN data with NameServer */
7791         vport->fc_ns_retry = 0;
7792         vport->num_disc_nodes = 0;
7793
7794         ndlp = lpfc_findnode_did(vport, NameServer_DID);
7795         if (ndlp && ndlp->nlp_state == NLP_STE_UNMAPPED_NODE) {
7796                 /* Good ndlp, issue CT Request to NameServer.  Need to
7797                  * know how many gidfts were issued.  If none, then just
7798                  * flush the RSCN.  Otherwise, the outstanding requests
7799                  * need to complete.
7800                  */
7801                 if (phba->cfg_ns_query == LPFC_NS_QUERY_GID_FT) {
7802                         if (lpfc_issue_gidft(vport) > 0)
7803                                 return 1;
7804                 } else if (phba->cfg_ns_query == LPFC_NS_QUERY_GID_PT) {
7805                         if (lpfc_issue_gidpt(vport) > 0)
7806                                 return 1;
7807                 } else {
7808                         return 1;
7809                 }
7810         } else {
7811                 /* Nameserver login in question.  Revalidate. */
7812                 if (ndlp) {
7813                         ndlp->nlp_prev_state = NLP_STE_UNUSED_NODE;
7814                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
7815                 } else {
7816                         ndlp = lpfc_nlp_init(vport, NameServer_DID);
7817                         if (!ndlp) {
7818                                 lpfc_els_flush_rscn(vport);
7819                                 return 0;
7820                         }
7821                         ndlp->nlp_prev_state = ndlp->nlp_state;
7822                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
7823                 }
7824                 ndlp->nlp_type |= NLP_FABRIC;
7825                 lpfc_issue_els_plogi(vport, NameServer_DID, 0);
7826                 /* Wait for NameServer login cmpl before we can
7827                  * continue
7828                  */
7829                 return 1;
7830         }
7831
7832         lpfc_els_flush_rscn(vport);
7833         return 0;
7834 }
7835
7836 /**
7837  * lpfc_els_rcv_flogi - Process an unsolicited flogi iocb
7838  * @vport: pointer to a host virtual N_Port data structure.
7839  * @cmdiocb: pointer to lpfc command iocb data structure.
7840  * @ndlp: pointer to a node-list data structure.
7841  *
7842  * This routine processes Fabric Login (FLOGI) IOCB received as an ELS
7843  * unsolicited event. An unsolicited FLOGI can be received in a point-to-
7844  * point topology. As an unsolicited FLOGI should not be received in a loop
7845  * mode, any unsolicited FLOGI received in loop mode shall be ignored. The
7846  * lpfc_check_sparm() routine is invoked to check the parameters in the
7847  * unsolicited FLOGI. If parameters validation failed, the routine
7848  * lpfc_els_rsp_reject() shall be called with reject reason code set to
7849  * LSEXP_SPARM_OPTIONS to reject the FLOGI. Otherwise, the Port WWN in the
7850  * FLOGI shall be compared with the Port WWN of the @vport to determine who
7851  * will initiate PLOGI. The higher lexicographical value party shall has
7852  * higher priority (as the winning port) and will initiate PLOGI and
7853  * communicate Port_IDs (Addresses) for both nodes in PLOGI. The result
7854  * of this will be marked in the @vport fc_flag field with FC_PT2PT_PLOGI
7855  * and then the lpfc_els_rsp_acc() routine is invoked to accept the FLOGI.
7856  *
7857  * Return code
7858  *   0 - Successfully processed the unsolicited flogi
7859  *   1 - Failed to process the unsolicited flogi
7860  **/
7861 static int
7862 lpfc_els_rcv_flogi(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
7863                    struct lpfc_nodelist *ndlp)
7864 {
7865         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
7866         struct lpfc_hba  *phba = vport->phba;
7867         struct lpfc_dmabuf *pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
7868         uint32_t *lp = (uint32_t *) pcmd->virt;
7869         IOCB_t *icmd = &cmdiocb->iocb;
7870         struct serv_parm *sp;
7871         LPFC_MBOXQ_t *mbox;
7872         uint32_t cmd, did;
7873         int rc;
7874         uint32_t fc_flag = 0;
7875         uint32_t port_state = 0;
7876
7877         cmd = *lp++;
7878         sp = (struct serv_parm *) lp;
7879
7880         /* FLOGI received */
7881
7882         lpfc_set_disctmo(vport);
7883
7884         if (phba->fc_topology == LPFC_TOPOLOGY_LOOP) {
7885                 /* We should never receive a FLOGI in loop mode, ignore it */
7886                 did = icmd->un.elsreq64.remoteID;
7887
7888                 /* An FLOGI ELS command <elsCmd> was received from DID <did> in
7889                    Loop Mode */
7890                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
7891                                  "0113 An FLOGI ELS command x%x was "
7892                                  "received from DID x%x in Loop Mode\n",
7893                                  cmd, did);
7894                 return 1;
7895         }
7896
7897         (void) lpfc_check_sparm(vport, ndlp, sp, CLASS3, 1);
7898
7899         /*
7900          * If our portname is greater than the remote portname,
7901          * then we initiate Nport login.
7902          */
7903
7904         rc = memcmp(&vport->fc_portname, &sp->portName,
7905                     sizeof(struct lpfc_name));
7906
7907         if (!rc) {
7908                 if (phba->sli_rev < LPFC_SLI_REV4) {
7909                         mbox = mempool_alloc(phba->mbox_mem_pool,
7910                                              GFP_KERNEL);
7911                         if (!mbox)
7912                                 return 1;
7913                         lpfc_linkdown(phba);
7914                         lpfc_init_link(phba, mbox,
7915                                        phba->cfg_topology,
7916                                        phba->cfg_link_speed);
7917                         mbox->u.mb.un.varInitLnk.lipsr_AL_PA = 0;
7918                         mbox->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
7919                         mbox->vport = vport;
7920                         rc = lpfc_sli_issue_mbox(phba, mbox,
7921                                                  MBX_NOWAIT);
7922                         lpfc_set_loopback_flag(phba);
7923                         if (rc == MBX_NOT_FINISHED)
7924                                 mempool_free(mbox, phba->mbox_mem_pool);
7925                         return 1;
7926                 }
7927
7928                 /* abort the flogi coming back to ourselves
7929                  * due to external loopback on the port.
7930                  */
7931                 lpfc_els_abort_flogi(phba);
7932                 return 0;
7933
7934         } else if (rc > 0) {    /* greater than */
7935                 spin_lock_irq(shost->host_lock);
7936                 vport->fc_flag |= FC_PT2PT_PLOGI;
7937                 spin_unlock_irq(shost->host_lock);
7938
7939                 /* If we have the high WWPN we can assign our own
7940                  * myDID; otherwise, we have to WAIT for a PLOGI
7941                  * from the remote NPort to find out what it
7942                  * will be.
7943                  */
7944                 vport->fc_myDID = PT2PT_LocalID;
7945         } else {
7946                 vport->fc_myDID = PT2PT_RemoteID;
7947         }
7948
7949         /*
7950          * The vport state should go to LPFC_FLOGI only
7951          * AFTER we issue a FLOGI, not receive one.
7952          */
7953         spin_lock_irq(shost->host_lock);
7954         fc_flag = vport->fc_flag;
7955         port_state = vport->port_state;
7956         vport->fc_flag |= FC_PT2PT;
7957         vport->fc_flag &= ~(FC_FABRIC | FC_PUBLIC_LOOP);
7958
7959         /* Acking an unsol FLOGI.  Count 1 for link bounce
7960          * work-around.
7961          */
7962         vport->rcv_flogi_cnt++;
7963         spin_unlock_irq(shost->host_lock);
7964         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
7965                          "3311 Rcv Flogi PS x%x new PS x%x "
7966                          "fc_flag x%x new fc_flag x%x\n",
7967                          port_state, vport->port_state,
7968                          fc_flag, vport->fc_flag);
7969
7970         /*
7971          * We temporarily set fc_myDID to make it look like we are
7972          * a Fabric. This is done just so we end up with the right
7973          * did / sid on the FLOGI ACC rsp.
7974          */
7975         did = vport->fc_myDID;
7976         vport->fc_myDID = Fabric_DID;
7977
7978         memcpy(&phba->fc_fabparam, sp, sizeof(struct serv_parm));
7979
7980         /* Defer ACC response until AFTER we issue a FLOGI */
7981         if (!(phba->hba_flag & HBA_FLOGI_ISSUED)) {
7982                 phba->defer_flogi_acc_rx_id = cmdiocb->iocb.ulpContext;
7983                 phba->defer_flogi_acc_ox_id =
7984                                         cmdiocb->iocb.unsli3.rcvsli3.ox_id;
7985
7986                 vport->fc_myDID = did;
7987
7988                 lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
7989                                  "3344 Deferring FLOGI ACC: rx_id: x%x,"
7990                                  " ox_id: x%x, hba_flag x%x\n",
7991                                  phba->defer_flogi_acc_rx_id,
7992                                  phba->defer_flogi_acc_ox_id, phba->hba_flag);
7993
7994                 phba->defer_flogi_acc_flag = true;
7995
7996                 return 0;
7997         }
7998
7999         /* Send back ACC */
8000         lpfc_els_rsp_acc(vport, ELS_CMD_FLOGI, cmdiocb, ndlp, NULL);
8001
8002         /* Now lets put fc_myDID back to what its supposed to be */
8003         vport->fc_myDID = did;
8004
8005         return 0;
8006 }
8007
8008 /**
8009  * lpfc_els_rcv_rnid - Process an unsolicited rnid iocb
8010  * @vport: pointer to a host virtual N_Port data structure.
8011  * @cmdiocb: pointer to lpfc command iocb data structure.
8012  * @ndlp: pointer to a node-list data structure.
8013  *
8014  * This routine processes Request Node Identification Data (RNID) IOCB
8015  * received as an ELS unsolicited event. Only when the RNID specified format
8016  * 0x0 or 0xDF (Topology Discovery Specific Node Identification Data)
8017  * present, this routine will invoke the lpfc_els_rsp_rnid_acc() routine to
8018  * Accept (ACC) the RNID ELS command. All the other RNID formats are
8019  * rejected by invoking the lpfc_els_rsp_reject() routine.
8020  *
8021  * Return code
8022  *   0 - Successfully processed rnid iocb (currently always return 0)
8023  **/
8024 static int
8025 lpfc_els_rcv_rnid(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
8026                   struct lpfc_nodelist *ndlp)
8027 {
8028         struct lpfc_dmabuf *pcmd;
8029         uint32_t *lp;
8030         RNID *rn;
8031         struct ls_rjt stat;
8032
8033         pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
8034         lp = (uint32_t *) pcmd->virt;
8035
8036         lp++;
8037         rn = (RNID *) lp;
8038
8039         /* RNID received */
8040
8041         switch (rn->Format) {
8042         case 0:
8043         case RNID_TOPOLOGY_DISC:
8044                 /* Send back ACC */
8045                 lpfc_els_rsp_rnid_acc(vport, rn->Format, cmdiocb, ndlp);
8046                 break;
8047         default:
8048                 /* Reject this request because format not supported */
8049                 stat.un.b.lsRjtRsvd0 = 0;
8050                 stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
8051                 stat.un.b.lsRjtRsnCodeExp = LSEXP_CANT_GIVE_DATA;
8052                 stat.un.b.vendorUnique = 0;
8053                 lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp,
8054                         NULL);
8055         }
8056         return 0;
8057 }
8058
8059 /**
8060  * lpfc_els_rcv_echo - Process an unsolicited echo iocb
8061  * @vport: pointer to a host virtual N_Port data structure.
8062  * @cmdiocb: pointer to lpfc command iocb data structure.
8063  * @ndlp: pointer to a node-list data structure.
8064  *
8065  * Return code
8066  *   0 - Successfully processed echo iocb (currently always return 0)
8067  **/
8068 static int
8069 lpfc_els_rcv_echo(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
8070                   struct lpfc_nodelist *ndlp)
8071 {
8072         uint8_t *pcmd;
8073
8074         pcmd = (uint8_t *) (((struct lpfc_dmabuf *) cmdiocb->context2)->virt);
8075
8076         /* skip over first word of echo command to find echo data */
8077         pcmd += sizeof(uint32_t);
8078
8079         lpfc_els_rsp_echo_acc(vport, pcmd, cmdiocb, ndlp);
8080         return 0;
8081 }
8082
8083 /**
8084  * lpfc_els_rcv_lirr - Process an unsolicited lirr iocb
8085  * @vport: pointer to a host virtual N_Port data structure.
8086  * @cmdiocb: pointer to lpfc command iocb data structure.
8087  * @ndlp: pointer to a node-list data structure.
8088  *
8089  * This routine processes a Link Incident Report Registration(LIRR) IOCB
8090  * received as an ELS unsolicited event. Currently, this function just invokes
8091  * the lpfc_els_rsp_reject() routine to reject the LIRR IOCB unconditionally.
8092  *
8093  * Return code
8094  *   0 - Successfully processed lirr iocb (currently always return 0)
8095  **/
8096 static int
8097 lpfc_els_rcv_lirr(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
8098                   struct lpfc_nodelist *ndlp)
8099 {
8100         struct ls_rjt stat;
8101
8102         /* For now, unconditionally reject this command */
8103         stat.un.b.lsRjtRsvd0 = 0;
8104         stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
8105         stat.un.b.lsRjtRsnCodeExp = LSEXP_CANT_GIVE_DATA;
8106         stat.un.b.vendorUnique = 0;
8107         lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
8108         return 0;
8109 }
8110
8111 /**
8112  * lpfc_els_rcv_rrq - Process an unsolicited rrq iocb
8113  * @vport: pointer to a host virtual N_Port data structure.
8114  * @cmdiocb: pointer to lpfc command iocb data structure.
8115  * @ndlp: pointer to a node-list data structure.
8116  *
8117  * This routine processes a Reinstate Recovery Qualifier (RRQ) IOCB
8118  * received as an ELS unsolicited event. A request to RRQ shall only
8119  * be accepted if the Originator Nx_Port N_Port_ID or the Responder
8120  * Nx_Port N_Port_ID of the target Exchange is the same as the
8121  * N_Port_ID of the Nx_Port that makes the request. If the RRQ is
8122  * not accepted, an LS_RJT with reason code "Unable to perform
8123  * command request" and reason code explanation "Invalid Originator
8124  * S_ID" shall be returned. For now, we just unconditionally accept
8125  * RRQ from the target.
8126  **/
8127 static void
8128 lpfc_els_rcv_rrq(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
8129                  struct lpfc_nodelist *ndlp)
8130 {
8131         lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
8132         if (vport->phba->sli_rev == LPFC_SLI_REV4)
8133                 lpfc_els_clear_rrq(vport, cmdiocb, ndlp);
8134 }
8135
8136 /**
8137  * lpfc_els_rsp_rls_acc - Completion callbk func for MBX_READ_LNK_STAT mbox cmd
8138  * @phba: pointer to lpfc hba data structure.
8139  * @pmb: pointer to the driver internal queue element for mailbox command.
8140  *
8141  * This routine is the completion callback function for the MBX_READ_LNK_STAT
8142  * mailbox command. This callback function is to actually send the Accept
8143  * (ACC) response to a Read Link Status (RLS) unsolicited IOCB event. It
8144  * collects the link statistics from the completion of the MBX_READ_LNK_STAT
8145  * mailbox command, constructs the RLS response with the link statistics
8146  * collected, and then invokes the lpfc_sli_issue_iocb() routine to send ACC
8147  * response to the RLS.
8148  *
8149  * Note that the ndlp reference count will be incremented by 1 for holding the
8150  * ndlp and the reference to ndlp will be stored into the context1 field of
8151  * the IOCB for the completion callback function to the RLS Accept Response
8152  * ELS IOCB command.
8153  *
8154  **/
8155 static void
8156 lpfc_els_rsp_rls_acc(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
8157 {
8158         int rc = 0;
8159         MAILBOX_t *mb;
8160         IOCB_t *icmd;
8161         struct RLS_RSP *rls_rsp;
8162         uint8_t *pcmd;
8163         struct lpfc_iocbq *elsiocb;
8164         struct lpfc_nodelist *ndlp;
8165         uint16_t oxid;
8166         uint16_t rxid;
8167         uint32_t cmdsize;
8168
8169         mb = &pmb->u.mb;
8170
8171         ndlp = (struct lpfc_nodelist *)pmb->ctx_ndlp;
8172         rxid = (uint16_t)((unsigned long)(pmb->ctx_buf) & 0xffff);
8173         oxid = (uint16_t)(((unsigned long)(pmb->ctx_buf) >> 16) & 0xffff);
8174         pmb->ctx_buf = NULL;
8175         pmb->ctx_ndlp = NULL;
8176
8177         if (mb->mbxStatus) {
8178                 mempool_free(pmb, phba->mbox_mem_pool);
8179                 return;
8180         }
8181
8182         cmdsize = sizeof(struct RLS_RSP) + sizeof(uint32_t);
8183         elsiocb = lpfc_prep_els_iocb(phba->pport, 0, cmdsize,
8184                                      lpfc_max_els_tries, ndlp,
8185                                      ndlp->nlp_DID, ELS_CMD_ACC);
8186
8187         /* Decrement the ndlp reference count from previous mbox command */
8188         lpfc_nlp_put(ndlp);
8189
8190         if (!elsiocb) {
8191                 mempool_free(pmb, phba->mbox_mem_pool);
8192                 return;
8193         }
8194
8195         icmd = &elsiocb->iocb;
8196         icmd->ulpContext = rxid;
8197         icmd->unsli3.rcvsli3.ox_id = oxid;
8198
8199         pcmd = (uint8_t *) (((struct lpfc_dmabuf *) elsiocb->context2)->virt);
8200         *((uint32_t *) (pcmd)) = ELS_CMD_ACC;
8201         pcmd += sizeof(uint32_t); /* Skip past command */
8202         rls_rsp = (struct RLS_RSP *)pcmd;
8203
8204         rls_rsp->linkFailureCnt = cpu_to_be32(mb->un.varRdLnk.linkFailureCnt);
8205         rls_rsp->lossSyncCnt = cpu_to_be32(mb->un.varRdLnk.lossSyncCnt);
8206         rls_rsp->lossSignalCnt = cpu_to_be32(mb->un.varRdLnk.lossSignalCnt);
8207         rls_rsp->primSeqErrCnt = cpu_to_be32(mb->un.varRdLnk.primSeqErrCnt);
8208         rls_rsp->invalidXmitWord = cpu_to_be32(mb->un.varRdLnk.invalidXmitWord);
8209         rls_rsp->crcCnt = cpu_to_be32(mb->un.varRdLnk.crcCnt);
8210         mempool_free(pmb, phba->mbox_mem_pool);
8211         /* Xmit ELS RLS ACC response tag <ulpIoTag> */
8212         lpfc_printf_vlog(ndlp->vport, KERN_INFO, LOG_ELS,
8213                          "2874 Xmit ELS RLS ACC response tag x%x xri x%x, "
8214                          "did x%x, nlp_flag x%x, nlp_state x%x, rpi x%x\n",
8215                          elsiocb->iotag, elsiocb->iocb.ulpContext,
8216                          ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
8217                          ndlp->nlp_rpi);
8218         elsiocb->iocb_cmpl = lpfc_cmpl_els_rsp;
8219         phba->fc_stat.elsXmitACC++;
8220         elsiocb->context1 = lpfc_nlp_get(ndlp);
8221         if (!elsiocb->context1) {
8222                 lpfc_els_free_iocb(phba, elsiocb);
8223                 return;
8224         }
8225
8226         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
8227         if (rc == IOCB_ERROR) {
8228                 lpfc_els_free_iocb(phba, elsiocb);
8229                 lpfc_nlp_put(ndlp);
8230         }
8231         return;
8232 }
8233
8234 /**
8235  * lpfc_els_rcv_rls - Process an unsolicited rls iocb
8236  * @vport: pointer to a host virtual N_Port data structure.
8237  * @cmdiocb: pointer to lpfc command iocb data structure.
8238  * @ndlp: pointer to a node-list data structure.
8239  *
8240  * This routine processes Read Link Status (RLS) IOCB received as an
8241  * ELS unsolicited event. It first checks the remote port state. If the
8242  * remote port is not in NLP_STE_UNMAPPED_NODE state or NLP_STE_MAPPED_NODE
8243  * state, it invokes the lpfc_els_rsl_reject() routine to send the reject
8244  * response. Otherwise, it issue the MBX_READ_LNK_STAT mailbox command
8245  * for reading the HBA link statistics. It is for the callback function,
8246  * lpfc_els_rsp_rls_acc(), set to the MBX_READ_LNK_STAT mailbox command
8247  * to actually sending out RPL Accept (ACC) response.
8248  *
8249  * Return codes
8250  *   0 - Successfully processed rls iocb (currently always return 0)
8251  **/
8252 static int
8253 lpfc_els_rcv_rls(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
8254                  struct lpfc_nodelist *ndlp)
8255 {
8256         struct lpfc_hba *phba = vport->phba;
8257         LPFC_MBOXQ_t *mbox;
8258         struct ls_rjt stat;
8259
8260         if ((ndlp->nlp_state != NLP_STE_UNMAPPED_NODE) &&
8261             (ndlp->nlp_state != NLP_STE_MAPPED_NODE))
8262                 /* reject the unsolicited RLS request and done with it */
8263                 goto reject_out;
8264
8265         mbox = mempool_alloc(phba->mbox_mem_pool, GFP_ATOMIC);
8266         if (mbox) {
8267                 lpfc_read_lnk_stat(phba, mbox);
8268                 mbox->ctx_buf = (void *)((unsigned long)
8269                         ((cmdiocb->iocb.unsli3.rcvsli3.ox_id << 16) |
8270                         cmdiocb->iocb.ulpContext)); /* rx_id */
8271                 mbox->ctx_ndlp = lpfc_nlp_get(ndlp);
8272                 if (!mbox->ctx_ndlp)
8273                         goto node_err;
8274                 mbox->vport = vport;
8275                 mbox->mbox_cmpl = lpfc_els_rsp_rls_acc;
8276                 if (lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT)
8277                         != MBX_NOT_FINISHED)
8278                         /* Mbox completion will send ELS Response */
8279                         return 0;
8280                 /* Decrement reference count used for the failed mbox
8281                  * command.
8282                  */
8283                 lpfc_nlp_put(ndlp);
8284 node_err:
8285                 mempool_free(mbox, phba->mbox_mem_pool);
8286         }
8287 reject_out:
8288         /* issue rejection response */
8289         stat.un.b.lsRjtRsvd0 = 0;
8290         stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
8291         stat.un.b.lsRjtRsnCodeExp = LSEXP_CANT_GIVE_DATA;
8292         stat.un.b.vendorUnique = 0;
8293         lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
8294         return 0;
8295 }
8296
8297 /**
8298  * lpfc_els_rcv_rtv - Process an unsolicited rtv iocb
8299  * @vport: pointer to a host virtual N_Port data structure.
8300  * @cmdiocb: pointer to lpfc command iocb data structure.
8301  * @ndlp: pointer to a node-list data structure.
8302  *
8303  * This routine processes Read Timout Value (RTV) IOCB received as an
8304  * ELS unsolicited event. It first checks the remote port state. If the
8305  * remote port is not in NLP_STE_UNMAPPED_NODE state or NLP_STE_MAPPED_NODE
8306  * state, it invokes the lpfc_els_rsl_reject() routine to send the reject
8307  * response. Otherwise, it sends the Accept(ACC) response to a Read Timeout
8308  * Value (RTV) unsolicited IOCB event.
8309  *
8310  * Note that the ndlp reference count will be incremented by 1 for holding the
8311  * ndlp and the reference to ndlp will be stored into the context1 field of
8312  * the IOCB for the completion callback function to the RTV Accept Response
8313  * ELS IOCB command.
8314  *
8315  * Return codes
8316  *   0 - Successfully processed rtv iocb (currently always return 0)
8317  **/
8318 static int
8319 lpfc_els_rcv_rtv(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
8320                  struct lpfc_nodelist *ndlp)
8321 {
8322         int rc = 0;
8323         struct lpfc_hba *phba = vport->phba;
8324         struct ls_rjt stat;
8325         struct RTV_RSP *rtv_rsp;
8326         uint8_t *pcmd;
8327         struct lpfc_iocbq *elsiocb;
8328         uint32_t cmdsize;
8329
8330
8331         if ((ndlp->nlp_state != NLP_STE_UNMAPPED_NODE) &&
8332             (ndlp->nlp_state != NLP_STE_MAPPED_NODE))
8333                 /* reject the unsolicited RTV request and done with it */
8334                 goto reject_out;
8335
8336         cmdsize = sizeof(struct RTV_RSP) + sizeof(uint32_t);
8337         elsiocb = lpfc_prep_els_iocb(phba->pport, 0, cmdsize,
8338                                      lpfc_max_els_tries, ndlp,
8339                                      ndlp->nlp_DID, ELS_CMD_ACC);
8340
8341         if (!elsiocb)
8342                 return 1;
8343
8344         pcmd = (uint8_t *) (((struct lpfc_dmabuf *) elsiocb->context2)->virt);
8345         *((uint32_t *) (pcmd)) = ELS_CMD_ACC;
8346         pcmd += sizeof(uint32_t); /* Skip past command */
8347
8348         /* use the command's xri in the response */
8349         elsiocb->iocb.ulpContext = cmdiocb->iocb.ulpContext;  /* Xri / rx_id */
8350         elsiocb->iocb.unsli3.rcvsli3.ox_id = cmdiocb->iocb.unsli3.rcvsli3.ox_id;
8351
8352         rtv_rsp = (struct RTV_RSP *)pcmd;
8353
8354         /* populate RTV payload */
8355         rtv_rsp->ratov = cpu_to_be32(phba->fc_ratov * 1000); /* report msecs */
8356         rtv_rsp->edtov = cpu_to_be32(phba->fc_edtov);
8357         bf_set(qtov_edtovres, rtv_rsp, phba->fc_edtovResol ? 1 : 0);
8358         bf_set(qtov_rttov, rtv_rsp, 0); /* Field is for FC ONLY */
8359         rtv_rsp->qtov = cpu_to_be32(rtv_rsp->qtov);
8360
8361         /* Xmit ELS RLS ACC response tag <ulpIoTag> */
8362         lpfc_printf_vlog(ndlp->vport, KERN_INFO, LOG_ELS,
8363                          "2875 Xmit ELS RTV ACC response tag x%x xri x%x, "
8364                          "did x%x, nlp_flag x%x, nlp_state x%x, rpi x%x, "
8365                          "Data: x%x x%x x%x\n",
8366                          elsiocb->iotag, elsiocb->iocb.ulpContext,
8367                          ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
8368                          ndlp->nlp_rpi,
8369                         rtv_rsp->ratov, rtv_rsp->edtov, rtv_rsp->qtov);
8370         elsiocb->iocb_cmpl = lpfc_cmpl_els_rsp;
8371         phba->fc_stat.elsXmitACC++;
8372         elsiocb->context1 = lpfc_nlp_get(ndlp);
8373         if (!elsiocb->context1) {
8374                 lpfc_els_free_iocb(phba, elsiocb);
8375                 return 0;
8376         }
8377
8378         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
8379         if (rc == IOCB_ERROR) {
8380                 lpfc_els_free_iocb(phba, elsiocb);
8381                 lpfc_nlp_put(ndlp);
8382         }
8383         return 0;
8384
8385 reject_out:
8386         /* issue rejection response */
8387         stat.un.b.lsRjtRsvd0 = 0;
8388         stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
8389         stat.un.b.lsRjtRsnCodeExp = LSEXP_CANT_GIVE_DATA;
8390         stat.un.b.vendorUnique = 0;
8391         lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
8392         return 0;
8393 }
8394
8395 /* lpfc_issue_els_rrq - Process an unsolicited rrq iocb
8396  * @vport: pointer to a host virtual N_Port data structure.
8397  * @ndlp: pointer to a node-list data structure.
8398  * @did: DID of the target.
8399  * @rrq: Pointer to the rrq struct.
8400  *
8401  * Build a ELS RRQ command and send it to the target. If the issue_iocb is
8402  * Successful the the completion handler will clear the RRQ.
8403  *
8404  * Return codes
8405  *   0 - Successfully sent rrq els iocb.
8406  *   1 - Failed to send rrq els iocb.
8407  **/
8408 static int
8409 lpfc_issue_els_rrq(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
8410                         uint32_t did, struct lpfc_node_rrq *rrq)
8411 {
8412         struct lpfc_hba  *phba = vport->phba;
8413         struct RRQ *els_rrq;
8414         struct lpfc_iocbq *elsiocb;
8415         uint8_t *pcmd;
8416         uint16_t cmdsize;
8417         int ret;
8418
8419         if (!ndlp)
8420                 return 1;
8421
8422         /* If ndlp is not NULL, we will bump the reference count on it */
8423         cmdsize = (sizeof(uint32_t) + sizeof(struct RRQ));
8424         elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, 0, ndlp, did,
8425                                      ELS_CMD_RRQ);
8426         if (!elsiocb)
8427                 return 1;
8428
8429         pcmd = (uint8_t *) (((struct lpfc_dmabuf *) elsiocb->context2)->virt);
8430
8431         /* For RRQ request, remainder of payload is Exchange IDs */
8432         *((uint32_t *) (pcmd)) = ELS_CMD_RRQ;
8433         pcmd += sizeof(uint32_t);
8434         els_rrq = (struct RRQ *) pcmd;
8435
8436         bf_set(rrq_oxid, els_rrq, phba->sli4_hba.xri_ids[rrq->xritag]);
8437         bf_set(rrq_rxid, els_rrq, rrq->rxid);
8438         bf_set(rrq_did, els_rrq, vport->fc_myDID);
8439         els_rrq->rrq = cpu_to_be32(els_rrq->rrq);
8440         els_rrq->rrq_exchg = cpu_to_be32(els_rrq->rrq_exchg);
8441
8442
8443         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
8444                 "Issue RRQ:     did:x%x",
8445                 did, rrq->xritag, rrq->rxid);
8446         elsiocb->context_un.rrq = rrq;
8447         elsiocb->iocb_cmpl = lpfc_cmpl_els_rrq;
8448
8449         lpfc_nlp_get(ndlp);
8450         elsiocb->context1 = ndlp;
8451
8452         ret = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
8453         if (ret == IOCB_ERROR)
8454                 goto io_err;
8455         return 0;
8456
8457  io_err:
8458         lpfc_els_free_iocb(phba, elsiocb);
8459         lpfc_nlp_put(ndlp);
8460         return 1;
8461 }
8462
8463 /**
8464  * lpfc_send_rrq - Sends ELS RRQ if needed.
8465  * @phba: pointer to lpfc hba data structure.
8466  * @rrq: pointer to the active rrq.
8467  *
8468  * This routine will call the lpfc_issue_els_rrq if the rrq is
8469  * still active for the xri. If this function returns a failure then
8470  * the caller needs to clean up the RRQ by calling lpfc_clr_active_rrq.
8471  *
8472  * Returns 0 Success.
8473  *         1 Failure.
8474  **/
8475 int
8476 lpfc_send_rrq(struct lpfc_hba *phba, struct lpfc_node_rrq *rrq)
8477 {
8478         struct lpfc_nodelist *ndlp = lpfc_findnode_did(rrq->vport,
8479                                                        rrq->nlp_DID);
8480         if (!ndlp)
8481                 return 1;
8482
8483         if (lpfc_test_rrq_active(phba, ndlp, rrq->xritag))
8484                 return lpfc_issue_els_rrq(rrq->vport, ndlp,
8485                                          rrq->nlp_DID, rrq);
8486         else
8487                 return 1;
8488 }
8489
8490 /**
8491  * lpfc_els_rsp_rpl_acc - Issue an accept rpl els command
8492  * @vport: pointer to a host virtual N_Port data structure.
8493  * @cmdsize: size of the ELS command.
8494  * @oldiocb: pointer to the original lpfc command iocb data structure.
8495  * @ndlp: pointer to a node-list data structure.
8496  *
8497  * This routine issuees an Accept (ACC) Read Port List (RPL) ELS command.
8498  * It is to be called by the lpfc_els_rcv_rpl() routine to accept the RPL.
8499  *
8500  * Note that the ndlp reference count will be incremented by 1 for holding the
8501  * ndlp and the reference to ndlp will be stored into the context1 field of
8502  * the IOCB for the completion callback function to the RPL Accept Response
8503  * ELS command.
8504  *
8505  * Return code
8506  *   0 - Successfully issued ACC RPL ELS command
8507  *   1 - Failed to issue ACC RPL ELS command
8508  **/
8509 static int
8510 lpfc_els_rsp_rpl_acc(struct lpfc_vport *vport, uint16_t cmdsize,
8511                      struct lpfc_iocbq *oldiocb, struct lpfc_nodelist *ndlp)
8512 {
8513         int rc = 0;
8514         struct lpfc_hba *phba = vport->phba;
8515         IOCB_t *icmd, *oldcmd;
8516         RPL_RSP rpl_rsp;
8517         struct lpfc_iocbq *elsiocb;
8518         uint8_t *pcmd;
8519
8520         elsiocb = lpfc_prep_els_iocb(vport, 0, cmdsize, oldiocb->retry, ndlp,
8521                                      ndlp->nlp_DID, ELS_CMD_ACC);
8522
8523         if (!elsiocb)
8524                 return 1;
8525
8526         icmd = &elsiocb->iocb;
8527         oldcmd = &oldiocb->iocb;
8528         icmd->ulpContext = oldcmd->ulpContext;  /* Xri / rx_id */
8529         icmd->unsli3.rcvsli3.ox_id = oldcmd->unsli3.rcvsli3.ox_id;
8530
8531         pcmd = (((struct lpfc_dmabuf *) elsiocb->context2)->virt);
8532         *((uint32_t *) (pcmd)) = ELS_CMD_ACC;
8533         pcmd += sizeof(uint16_t);
8534         *((uint16_t *)(pcmd)) = be16_to_cpu(cmdsize);
8535         pcmd += sizeof(uint16_t);
8536
8537         /* Setup the RPL ACC payload */
8538         rpl_rsp.listLen = be32_to_cpu(1);
8539         rpl_rsp.index = 0;
8540         rpl_rsp.port_num_blk.portNum = 0;
8541         rpl_rsp.port_num_blk.portID = be32_to_cpu(vport->fc_myDID);
8542         memcpy(&rpl_rsp.port_num_blk.portName, &vport->fc_portname,
8543             sizeof(struct lpfc_name));
8544         memcpy(pcmd, &rpl_rsp, cmdsize - sizeof(uint32_t));
8545         /* Xmit ELS RPL ACC response tag <ulpIoTag> */
8546         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
8547                          "0120 Xmit ELS RPL ACC response tag x%x "
8548                          "xri x%x, did x%x, nlp_flag x%x, nlp_state x%x, "
8549                          "rpi x%x\n",
8550                          elsiocb->iotag, elsiocb->iocb.ulpContext,
8551                          ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
8552                          ndlp->nlp_rpi);
8553         elsiocb->iocb_cmpl = lpfc_cmpl_els_rsp;
8554         phba->fc_stat.elsXmitACC++;
8555         elsiocb->context1 = lpfc_nlp_get(ndlp);
8556         if (!elsiocb->context1) {
8557                 lpfc_els_free_iocb(phba, elsiocb);
8558                 return 1;
8559         }
8560
8561         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
8562         if (rc == IOCB_ERROR) {
8563                 lpfc_els_free_iocb(phba, elsiocb);
8564                 lpfc_nlp_put(ndlp);
8565                 return 1;
8566         }
8567
8568         return 0;
8569 }
8570
8571 /**
8572  * lpfc_els_rcv_rpl - Process an unsolicited rpl iocb
8573  * @vport: pointer to a host virtual N_Port data structure.
8574  * @cmdiocb: pointer to lpfc command iocb data structure.
8575  * @ndlp: pointer to a node-list data structure.
8576  *
8577  * This routine processes Read Port List (RPL) IOCB received as an ELS
8578  * unsolicited event. It first checks the remote port state. If the remote
8579  * port is not in NLP_STE_UNMAPPED_NODE and NLP_STE_MAPPED_NODE states, it
8580  * invokes the lpfc_els_rsp_reject() routine to send reject response.
8581  * Otherwise, this routine then invokes the lpfc_els_rsp_rpl_acc() routine
8582  * to accept the RPL.
8583  *
8584  * Return code
8585  *   0 - Successfully processed rpl iocb (currently always return 0)
8586  **/
8587 static int
8588 lpfc_els_rcv_rpl(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
8589                  struct lpfc_nodelist *ndlp)
8590 {
8591         struct lpfc_dmabuf *pcmd;
8592         uint32_t *lp;
8593         uint32_t maxsize;
8594         uint16_t cmdsize;
8595         RPL *rpl;
8596         struct ls_rjt stat;
8597
8598         if ((ndlp->nlp_state != NLP_STE_UNMAPPED_NODE) &&
8599             (ndlp->nlp_state != NLP_STE_MAPPED_NODE)) {
8600                 /* issue rejection response */
8601                 stat.un.b.lsRjtRsvd0 = 0;
8602                 stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
8603                 stat.un.b.lsRjtRsnCodeExp = LSEXP_CANT_GIVE_DATA;
8604                 stat.un.b.vendorUnique = 0;
8605                 lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp,
8606                         NULL);
8607                 /* rejected the unsolicited RPL request and done with it */
8608                 return 0;
8609         }
8610
8611         pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
8612         lp = (uint32_t *) pcmd->virt;
8613         rpl = (RPL *) (lp + 1);
8614         maxsize = be32_to_cpu(rpl->maxsize);
8615
8616         /* We support only one port */
8617         if ((rpl->index == 0) &&
8618             ((maxsize == 0) ||
8619              ((maxsize * sizeof(uint32_t)) >= sizeof(RPL_RSP)))) {
8620                 cmdsize = sizeof(uint32_t) + sizeof(RPL_RSP);
8621         } else {
8622                 cmdsize = sizeof(uint32_t) + maxsize * sizeof(uint32_t);
8623         }
8624         lpfc_els_rsp_rpl_acc(vport, cmdsize, cmdiocb, ndlp);
8625
8626         return 0;
8627 }
8628
8629 /**
8630  * lpfc_els_rcv_farp - Process an unsolicited farp request els command
8631  * @vport: pointer to a virtual N_Port data structure.
8632  * @cmdiocb: pointer to lpfc command iocb data structure.
8633  * @ndlp: pointer to a node-list data structure.
8634  *
8635  * This routine processes Fibre Channel Address Resolution Protocol
8636  * (FARP) Request IOCB received as an ELS unsolicited event. Currently,
8637  * the lpfc driver only supports matching on WWPN or WWNN for FARP. As such,
8638  * FARP_MATCH_PORT flag and FARP_MATCH_NODE flag are checked against the
8639  * Match Flag in the FARP request IOCB: if FARP_MATCH_PORT flag is set, the
8640  * remote PortName is compared against the FC PortName stored in the @vport
8641  * data structure; if FARP_MATCH_NODE flag is set, the remote NodeName is
8642  * compared against the FC NodeName stored in the @vport data structure.
8643  * If any of these matches and the FARP_REQUEST_FARPR flag is set in the
8644  * FARP request IOCB Response Flag, the lpfc_issue_els_farpr() routine is
8645  * invoked to send out FARP Response to the remote node. Before sending the
8646  * FARP Response, however, the FARP_REQUEST_PLOGI flag is check in the FARP
8647  * request IOCB Response Flag and, if it is set, the lpfc_issue_els_plogi()
8648  * routine is invoked to log into the remote port first.
8649  *
8650  * Return code
8651  *   0 - Either the FARP Match Mode not supported or successfully processed
8652  **/
8653 static int
8654 lpfc_els_rcv_farp(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
8655                   struct lpfc_nodelist *ndlp)
8656 {
8657         struct lpfc_dmabuf *pcmd;
8658         uint32_t *lp;
8659         IOCB_t *icmd;
8660         FARP *fp;
8661         uint32_t cnt, did;
8662
8663         icmd = &cmdiocb->iocb;
8664         did = icmd->un.elsreq64.remoteID;
8665         pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
8666         lp = (uint32_t *) pcmd->virt;
8667
8668         lp++;
8669         fp = (FARP *) lp;
8670         /* FARP-REQ received from DID <did> */
8671         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
8672                          "0601 FARP-REQ received from DID x%x\n", did);
8673         /* We will only support match on WWPN or WWNN */
8674         if (fp->Mflags & ~(FARP_MATCH_NODE | FARP_MATCH_PORT)) {
8675                 return 0;
8676         }
8677
8678         cnt = 0;
8679         /* If this FARP command is searching for my portname */
8680         if (fp->Mflags & FARP_MATCH_PORT) {
8681                 if (memcmp(&fp->RportName, &vport->fc_portname,
8682                            sizeof(struct lpfc_name)) == 0)
8683                         cnt = 1;
8684         }
8685
8686         /* If this FARP command is searching for my nodename */
8687         if (fp->Mflags & FARP_MATCH_NODE) {
8688                 if (memcmp(&fp->RnodeName, &vport->fc_nodename,
8689                            sizeof(struct lpfc_name)) == 0)
8690                         cnt = 1;
8691         }
8692
8693         if (cnt) {
8694                 if ((ndlp->nlp_state == NLP_STE_UNMAPPED_NODE) ||
8695                    (ndlp->nlp_state == NLP_STE_MAPPED_NODE)) {
8696                         /* Log back into the node before sending the FARP. */
8697                         if (fp->Rflags & FARP_REQUEST_PLOGI) {
8698                                 ndlp->nlp_prev_state = ndlp->nlp_state;
8699                                 lpfc_nlp_set_state(vport, ndlp,
8700                                                    NLP_STE_PLOGI_ISSUE);
8701                                 lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0);
8702                         }
8703
8704                         /* Send a FARP response to that node */
8705                         if (fp->Rflags & FARP_REQUEST_FARPR)
8706                                 lpfc_issue_els_farpr(vport, did, 0);
8707                 }
8708         }
8709         return 0;
8710 }
8711
8712 /**
8713  * lpfc_els_rcv_farpr - Process an unsolicited farp response iocb
8714  * @vport: pointer to a host virtual N_Port data structure.
8715  * @cmdiocb: pointer to lpfc command iocb data structure.
8716  * @ndlp: pointer to a node-list data structure.
8717  *
8718  * This routine processes Fibre Channel Address Resolution Protocol
8719  * Response (FARPR) IOCB received as an ELS unsolicited event. It simply
8720  * invokes the lpfc_els_rsp_acc() routine to the remote node to accept
8721  * the FARP response request.
8722  *
8723  * Return code
8724  *   0 - Successfully processed FARPR IOCB (currently always return 0)
8725  **/
8726 static int
8727 lpfc_els_rcv_farpr(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
8728                    struct lpfc_nodelist  *ndlp)
8729 {
8730         struct lpfc_dmabuf *pcmd;
8731         uint32_t *lp;
8732         IOCB_t *icmd;
8733         uint32_t did;
8734
8735         icmd = &cmdiocb->iocb;
8736         did = icmd->un.elsreq64.remoteID;
8737         pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
8738         lp = (uint32_t *) pcmd->virt;
8739
8740         lp++;
8741         /* FARP-RSP received from DID <did> */
8742         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
8743                          "0600 FARP-RSP received from DID x%x\n", did);
8744         /* ACCEPT the Farp resp request */
8745         lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
8746
8747         return 0;
8748 }
8749
8750 /**
8751  * lpfc_els_rcv_fan - Process an unsolicited fan iocb command
8752  * @vport: pointer to a host virtual N_Port data structure.
8753  * @cmdiocb: pointer to lpfc command iocb data structure.
8754  * @fan_ndlp: pointer to a node-list data structure.
8755  *
8756  * This routine processes a Fabric Address Notification (FAN) IOCB
8757  * command received as an ELS unsolicited event. The FAN ELS command will
8758  * only be processed on a physical port (i.e., the @vport represents the
8759  * physical port). The fabric NodeName and PortName from the FAN IOCB are
8760  * compared against those in the phba data structure. If any of those is
8761  * different, the lpfc_initial_flogi() routine is invoked to initialize
8762  * Fabric Login (FLOGI) to the fabric to start the discover over. Otherwise,
8763  * if both of those are identical, the lpfc_issue_fabric_reglogin() routine
8764  * is invoked to register login to the fabric.
8765  *
8766  * Return code
8767  *   0 - Successfully processed fan iocb (currently always return 0).
8768  **/
8769 static int
8770 lpfc_els_rcv_fan(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
8771                  struct lpfc_nodelist *fan_ndlp)
8772 {
8773         struct lpfc_hba *phba = vport->phba;
8774         uint32_t *lp;
8775         FAN *fp;
8776
8777         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS, "0265 FAN received\n");
8778         lp = (uint32_t *)((struct lpfc_dmabuf *)cmdiocb->context2)->virt;
8779         fp = (FAN *) ++lp;
8780         /* FAN received; Fan does not have a reply sequence */
8781         if ((vport == phba->pport) &&
8782             (vport->port_state == LPFC_LOCAL_CFG_LINK)) {
8783                 if ((memcmp(&phba->fc_fabparam.nodeName, &fp->FnodeName,
8784                             sizeof(struct lpfc_name))) ||
8785                     (memcmp(&phba->fc_fabparam.portName, &fp->FportName,
8786                             sizeof(struct lpfc_name)))) {
8787                         /* This port has switched fabrics. FLOGI is required */
8788                         lpfc_issue_init_vfi(vport);
8789                 } else {
8790                         /* FAN verified - skip FLOGI */
8791                         vport->fc_myDID = vport->fc_prevDID;
8792                         if (phba->sli_rev < LPFC_SLI_REV4)
8793                                 lpfc_issue_fabric_reglogin(vport);
8794                         else {
8795                                 lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
8796                                         "3138 Need register VFI: (x%x/%x)\n",
8797                                         vport->fc_prevDID, vport->fc_myDID);
8798                                 lpfc_issue_reg_vfi(vport);
8799                         }
8800                 }
8801         }
8802         return 0;
8803 }
8804
8805 /**
8806  * lpfc_els_rcv_edc - Process an unsolicited EDC iocb
8807  * @vport: pointer to a host virtual N_Port data structure.
8808  * @cmdiocb: pointer to lpfc command iocb data structure.
8809  * @ndlp: pointer to a node-list data structure.
8810  *
8811  * Return code
8812  *   0 - Successfully processed echo iocb (currently always return 0)
8813  **/
8814 static int
8815 lpfc_els_rcv_edc(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
8816                  struct lpfc_nodelist *ndlp)
8817 {
8818         struct lpfc_hba  *phba = vport->phba;
8819         struct fc_els_edc *edc_req;
8820         struct fc_tlv_desc *tlv;
8821         uint8_t *payload;
8822         uint32_t *ptr, dtag;
8823         const char *dtag_nm;
8824         int desc_cnt = 0, bytes_remain;
8825         bool rcv_cap_desc = false;
8826
8827         payload = ((struct lpfc_dmabuf *)cmdiocb->context2)->virt;
8828
8829         edc_req = (struct fc_els_edc *)payload;
8830         bytes_remain = be32_to_cpu(edc_req->desc_len);
8831
8832         ptr = (uint32_t *)payload;
8833         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS | LOG_CGN_MGMT,
8834                          "3319 Rcv EDC payload len %d: x%x x%x x%x\n",
8835                          bytes_remain, be32_to_cpu(*ptr),
8836                          be32_to_cpu(*(ptr + 1)), be32_to_cpu(*(ptr + 2)));
8837
8838         /* No signal support unless there is a congestion descriptor */
8839         phba->cgn_reg_signal = EDC_CG_SIG_NOTSUPPORTED;
8840         phba->cgn_sig_freq = 0;
8841         phba->cgn_reg_fpin = LPFC_CGN_FPIN_ALARM | LPFC_CGN_FPIN_WARN;
8842
8843         if (bytes_remain <= 0)
8844                 goto out;
8845
8846         tlv = edc_req->desc;
8847
8848         /*
8849          * cycle through EDC diagnostic descriptors to find the
8850          * congestion signaling capability descriptor
8851          */
8852         while (bytes_remain && !rcv_cap_desc) {
8853                 if (bytes_remain < FC_TLV_DESC_HDR_SZ) {
8854                         lpfc_printf_log(phba, KERN_WARNING, LOG_CGN_MGMT,
8855                                         "6464 Truncated TLV hdr on "
8856                                         "Diagnostic descriptor[%d]\n",
8857                                         desc_cnt);
8858                         goto out;
8859                 }
8860
8861                 dtag = be32_to_cpu(tlv->desc_tag);
8862                 switch (dtag) {
8863                 case ELS_DTAG_LNK_FAULT_CAP:
8864                         if (bytes_remain < FC_TLV_DESC_SZ_FROM_LENGTH(tlv) ||
8865                             FC_TLV_DESC_SZ_FROM_LENGTH(tlv) !=
8866                                 sizeof(struct fc_diag_lnkflt_desc)) {
8867                                 lpfc_printf_log(
8868                                         phba, KERN_WARNING, LOG_CGN_MGMT,
8869                                         "6465 Truncated Link Fault Diagnostic "
8870                                         "descriptor[%d]: %d vs 0x%zx 0x%zx\n",
8871                                         desc_cnt, bytes_remain,
8872                                         FC_TLV_DESC_SZ_FROM_LENGTH(tlv),
8873                                         sizeof(struct fc_diag_cg_sig_desc));
8874                                 goto out;
8875                         }
8876                         /* No action for Link Fault descriptor for now */
8877                         break;
8878                 case ELS_DTAG_CG_SIGNAL_CAP:
8879                         if (bytes_remain < FC_TLV_DESC_SZ_FROM_LENGTH(tlv) ||
8880                             FC_TLV_DESC_SZ_FROM_LENGTH(tlv) !=
8881                                 sizeof(struct fc_diag_cg_sig_desc)) {
8882                                 lpfc_printf_log(
8883                                         phba, KERN_WARNING, LOG_CGN_MGMT,
8884                                         "6466 Truncated cgn signal Diagnostic "
8885                                         "descriptor[%d]: %d vs 0x%zx 0x%zx\n",
8886                                         desc_cnt, bytes_remain,
8887                                         FC_TLV_DESC_SZ_FROM_LENGTH(tlv),
8888                                         sizeof(struct fc_diag_cg_sig_desc));
8889                                 goto out;
8890                         }
8891
8892                         phba->cgn_reg_fpin = phba->cgn_init_reg_fpin;
8893                         phba->cgn_reg_signal = phba->cgn_init_reg_signal;
8894
8895                         /* We start negotiation with lpfc_fabric_cgn_frequency.
8896                          * When we process the EDC, we will settle on the
8897                          * higher frequency.
8898                          */
8899                         phba->cgn_sig_freq = lpfc_fabric_cgn_frequency;
8900
8901                         lpfc_least_capable_settings(
8902                                 phba, (struct fc_diag_cg_sig_desc *)tlv);
8903                         rcv_cap_desc = true;
8904                         break;
8905                 default:
8906                         dtag_nm = lpfc_get_tlv_dtag_nm(dtag);
8907                         lpfc_printf_log(phba, KERN_WARNING, LOG_CGN_MGMT,
8908                                         "6467 unknown Diagnostic "
8909                                         "Descriptor[%d]: tag x%x (%s)\n",
8910                                         desc_cnt, dtag, dtag_nm);
8911                 }
8912                 bytes_remain -= FC_TLV_DESC_SZ_FROM_LENGTH(tlv);
8913                 tlv = fc_tlv_next_desc(tlv);
8914                 desc_cnt++;
8915         }
8916 out:
8917         /* Need to send back an ACC */
8918         lpfc_issue_els_edc_rsp(vport, cmdiocb, ndlp);
8919
8920         lpfc_config_cgn_signal(phba);
8921         return 0;
8922 }
8923
8924 /**
8925  * lpfc_els_timeout - Handler funciton to the els timer
8926  * @t: timer context used to obtain the vport.
8927  *
8928  * This routine is invoked by the ELS timer after timeout. It posts the ELS
8929  * timer timeout event by setting the WORKER_ELS_TMO bit to the work port
8930  * event bitmap and then invokes the lpfc_worker_wake_up() routine to wake
8931  * up the worker thread. It is for the worker thread to invoke the routine
8932  * lpfc_els_timeout_handler() to work on the posted event WORKER_ELS_TMO.
8933  **/
8934 void
8935 lpfc_els_timeout(struct timer_list *t)
8936 {
8937         struct lpfc_vport *vport = from_timer(vport, t, els_tmofunc);
8938         struct lpfc_hba   *phba = vport->phba;
8939         uint32_t tmo_posted;
8940         unsigned long iflag;
8941
8942         spin_lock_irqsave(&vport->work_port_lock, iflag);
8943         tmo_posted = vport->work_port_events & WORKER_ELS_TMO;
8944         if ((!tmo_posted) && (!(vport->load_flag & FC_UNLOADING)))
8945                 vport->work_port_events |= WORKER_ELS_TMO;
8946         spin_unlock_irqrestore(&vport->work_port_lock, iflag);
8947
8948         if ((!tmo_posted) && (!(vport->load_flag & FC_UNLOADING)))
8949                 lpfc_worker_wake_up(phba);
8950         return;
8951 }
8952
8953
8954 /**
8955  * lpfc_els_timeout_handler - Process an els timeout event
8956  * @vport: pointer to a virtual N_Port data structure.
8957  *
8958  * This routine is the actual handler function that processes an ELS timeout
8959  * event. It walks the ELS ring to get and abort all the IOCBs (except the
8960  * ABORT/CLOSE/FARP/FARPR/FDISC), which are associated with the @vport by
8961  * invoking the lpfc_sli_issue_abort_iotag() routine.
8962  **/
8963 void
8964 lpfc_els_timeout_handler(struct lpfc_vport *vport)
8965 {
8966         struct lpfc_hba  *phba = vport->phba;
8967         struct lpfc_sli_ring *pring;
8968         struct lpfc_iocbq *tmp_iocb, *piocb;
8969         IOCB_t *cmd = NULL;
8970         struct lpfc_dmabuf *pcmd;
8971         uint32_t els_command = 0;
8972         uint32_t timeout;
8973         uint32_t remote_ID = 0xffffffff;
8974         LIST_HEAD(abort_list);
8975
8976
8977         timeout = (uint32_t)(phba->fc_ratov << 1);
8978
8979         pring = lpfc_phba_elsring(phba);
8980         if (unlikely(!pring))
8981                 return;
8982
8983         if (phba->pport->load_flag & FC_UNLOADING)
8984                 return;
8985
8986         spin_lock_irq(&phba->hbalock);
8987         if (phba->sli_rev == LPFC_SLI_REV4)
8988                 spin_lock(&pring->ring_lock);
8989
8990         list_for_each_entry_safe(piocb, tmp_iocb, &pring->txcmplq, list) {
8991                 cmd = &piocb->iocb;
8992
8993                 if ((piocb->iocb_flag & LPFC_IO_LIBDFC) != 0 ||
8994                     piocb->iocb.ulpCommand == CMD_ABORT_XRI_CN ||
8995                     piocb->iocb.ulpCommand == CMD_CLOSE_XRI_CN)
8996                         continue;
8997
8998                 if (piocb->vport != vport)
8999                         continue;
9000
9001                 pcmd = (struct lpfc_dmabuf *) piocb->context2;
9002                 if (pcmd)
9003                         els_command = *(uint32_t *) (pcmd->virt);
9004
9005                 if (els_command == ELS_CMD_FARP ||
9006                     els_command == ELS_CMD_FARPR ||
9007                     els_command == ELS_CMD_FDISC)
9008                         continue;
9009
9010                 if (piocb->drvrTimeout > 0) {
9011                         if (piocb->drvrTimeout >= timeout)
9012                                 piocb->drvrTimeout -= timeout;
9013                         else
9014                                 piocb->drvrTimeout = 0;
9015                         continue;
9016                 }
9017
9018                 remote_ID = 0xffffffff;
9019                 if (cmd->ulpCommand != CMD_GEN_REQUEST64_CR)
9020                         remote_ID = cmd->un.elsreq64.remoteID;
9021                 else {
9022                         struct lpfc_nodelist *ndlp;
9023                         ndlp = __lpfc_findnode_rpi(vport, cmd->ulpContext);
9024                         if (ndlp)
9025                                 remote_ID = ndlp->nlp_DID;
9026                 }
9027                 list_add_tail(&piocb->dlist, &abort_list);
9028         }
9029         if (phba->sli_rev == LPFC_SLI_REV4)
9030                 spin_unlock(&pring->ring_lock);
9031         spin_unlock_irq(&phba->hbalock);
9032
9033         list_for_each_entry_safe(piocb, tmp_iocb, &abort_list, dlist) {
9034                 cmd = &piocb->iocb;
9035                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
9036                          "0127 ELS timeout Data: x%x x%x x%x "
9037                          "x%x\n", els_command,
9038                          remote_ID, cmd->ulpCommand, cmd->ulpIoTag);
9039                 spin_lock_irq(&phba->hbalock);
9040                 list_del_init(&piocb->dlist);
9041                 lpfc_sli_issue_abort_iotag(phba, pring, piocb, NULL);
9042                 spin_unlock_irq(&phba->hbalock);
9043         }
9044
9045         /* Make sure HBA is alive */
9046         lpfc_issue_hb_tmo(phba);
9047
9048         if (!list_empty(&pring->txcmplq))
9049                 if (!(phba->pport->load_flag & FC_UNLOADING))
9050                         mod_timer(&vport->els_tmofunc,
9051                                   jiffies + msecs_to_jiffies(1000 * timeout));
9052 }
9053
9054 /**
9055  * lpfc_els_flush_cmd - Clean up the outstanding els commands to a vport
9056  * @vport: pointer to a host virtual N_Port data structure.
9057  *
9058  * This routine is used to clean up all the outstanding ELS commands on a
9059  * @vport. It first aborts the @vport by invoking lpfc_fabric_abort_vport()
9060  * routine. After that, it walks the ELS transmit queue to remove all the
9061  * IOCBs with the @vport other than the QUE_RING and ABORT/CLOSE IOCBs. For
9062  * the IOCBs with a non-NULL completion callback function, the callback
9063  * function will be invoked with the status set to IOSTAT_LOCAL_REJECT and
9064  * un.ulpWord[4] set to IOERR_SLI_ABORTED. For IOCBs with a NULL completion
9065  * callback function, the IOCB will simply be released. Finally, it walks
9066  * the ELS transmit completion queue to issue an abort IOCB to any transmit
9067  * completion queue IOCB that is associated with the @vport and is not
9068  * an IOCB from libdfc (i.e., the management plane IOCBs that are not
9069  * part of the discovery state machine) out to HBA by invoking the
9070  * lpfc_sli_issue_abort_iotag() routine. Note that this function issues the
9071  * abort IOCB to any transmit completion queueed IOCB, it does not guarantee
9072  * the IOCBs are aborted when this function returns.
9073  **/
9074 void
9075 lpfc_els_flush_cmd(struct lpfc_vport *vport)
9076 {
9077         LIST_HEAD(abort_list);
9078         struct lpfc_hba  *phba = vport->phba;
9079         struct lpfc_sli_ring *pring;
9080         struct lpfc_iocbq *tmp_iocb, *piocb;
9081         IOCB_t *cmd = NULL;
9082         unsigned long iflags = 0;
9083
9084         lpfc_fabric_abort_vport(vport);
9085
9086         /*
9087          * For SLI3, only the hbalock is required.  But SLI4 needs to coordinate
9088          * with the ring insert operation.  Because lpfc_sli_issue_abort_iotag
9089          * ultimately grabs the ring_lock, the driver must splice the list into
9090          * a working list and release the locks before calling the abort.
9091          */
9092         spin_lock_irqsave(&phba->hbalock, iflags);
9093         pring = lpfc_phba_elsring(phba);
9094
9095         /* Bail out if we've no ELS wq, like in PCI error recovery case. */
9096         if (unlikely(!pring)) {
9097                 spin_unlock_irqrestore(&phba->hbalock, iflags);
9098                 return;
9099         }
9100
9101         if (phba->sli_rev == LPFC_SLI_REV4)
9102                 spin_lock(&pring->ring_lock);
9103
9104         /* First we need to issue aborts to outstanding cmds on txcmpl */
9105         list_for_each_entry_safe(piocb, tmp_iocb, &pring->txcmplq, list) {
9106                 if (piocb->iocb_flag & LPFC_IO_LIBDFC)
9107                         continue;
9108
9109                 if (piocb->vport != vport)
9110                         continue;
9111
9112                 if (piocb->iocb_flag & LPFC_DRIVER_ABORTED)
9113                         continue;
9114
9115                 /* On the ELS ring we can have ELS_REQUESTs or
9116                  * GEN_REQUESTs waiting for a response.
9117                  */
9118                 cmd = &piocb->iocb;
9119                 if (cmd->ulpCommand == CMD_ELS_REQUEST64_CR) {
9120                         list_add_tail(&piocb->dlist, &abort_list);
9121
9122                         /* If the link is down when flushing ELS commands
9123                          * the firmware will not complete them till after
9124                          * the link comes back up. This may confuse
9125                          * discovery for the new link up, so we need to
9126                          * change the compl routine to just clean up the iocb
9127                          * and avoid any retry logic.
9128                          */
9129                         if (phba->link_state == LPFC_LINK_DOWN)
9130                                 piocb->iocb_cmpl = lpfc_cmpl_els_link_down;
9131                 }
9132                 if (cmd->ulpCommand == CMD_GEN_REQUEST64_CR)
9133                         list_add_tail(&piocb->dlist, &abort_list);
9134         }
9135
9136         if (phba->sli_rev == LPFC_SLI_REV4)
9137                 spin_unlock(&pring->ring_lock);
9138         spin_unlock_irqrestore(&phba->hbalock, iflags);
9139
9140         /* Abort each txcmpl iocb on aborted list and remove the dlist links. */
9141         list_for_each_entry_safe(piocb, tmp_iocb, &abort_list, dlist) {
9142                 spin_lock_irqsave(&phba->hbalock, iflags);
9143                 list_del_init(&piocb->dlist);
9144                 lpfc_sli_issue_abort_iotag(phba, pring, piocb, NULL);
9145                 spin_unlock_irqrestore(&phba->hbalock, iflags);
9146         }
9147         /* Make sure HBA is alive */
9148         lpfc_issue_hb_tmo(phba);
9149
9150         if (!list_empty(&abort_list))
9151                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
9152                                  "3387 abort list for txq not empty\n");
9153         INIT_LIST_HEAD(&abort_list);
9154
9155         spin_lock_irqsave(&phba->hbalock, iflags);
9156         if (phba->sli_rev == LPFC_SLI_REV4)
9157                 spin_lock(&pring->ring_lock);
9158
9159         /* No need to abort the txq list,
9160          * just queue them up for lpfc_sli_cancel_iocbs
9161          */
9162         list_for_each_entry_safe(piocb, tmp_iocb, &pring->txq, list) {
9163                 cmd = &piocb->iocb;
9164
9165                 if (piocb->iocb_flag & LPFC_IO_LIBDFC) {
9166                         continue;
9167                 }
9168
9169                 /* Do not flush out the QUE_RING and ABORT/CLOSE iocbs */
9170                 if (cmd->ulpCommand == CMD_QUE_RING_BUF_CN ||
9171                     cmd->ulpCommand == CMD_QUE_RING_BUF64_CN ||
9172                     cmd->ulpCommand == CMD_CLOSE_XRI_CN ||
9173                     cmd->ulpCommand == CMD_ABORT_XRI_CN)
9174                         continue;
9175
9176                 if (piocb->vport != vport)
9177                         continue;
9178
9179                 list_del_init(&piocb->list);
9180                 list_add_tail(&piocb->list, &abort_list);
9181         }
9182
9183         /* The same holds true for any FLOGI/FDISC on the fabric_iocb_list */
9184         if (vport == phba->pport) {
9185                 list_for_each_entry_safe(piocb, tmp_iocb,
9186                                          &phba->fabric_iocb_list, list) {
9187                         cmd = &piocb->iocb;
9188                         list_del_init(&piocb->list);
9189                         list_add_tail(&piocb->list, &abort_list);
9190                 }
9191         }
9192
9193         if (phba->sli_rev == LPFC_SLI_REV4)
9194                 spin_unlock(&pring->ring_lock);
9195         spin_unlock_irqrestore(&phba->hbalock, iflags);
9196
9197         /* Cancel all the IOCBs from the completions list */
9198         lpfc_sli_cancel_iocbs(phba, &abort_list,
9199                               IOSTAT_LOCAL_REJECT, IOERR_SLI_ABORTED);
9200
9201         return;
9202 }
9203
9204 /**
9205  * lpfc_els_flush_all_cmd - Clean up all the outstanding els commands to a HBA
9206  * @phba: pointer to lpfc hba data structure.
9207  *
9208  * This routine is used to clean up all the outstanding ELS commands on a
9209  * @phba. It first aborts the @phba by invoking the lpfc_fabric_abort_hba()
9210  * routine. After that, it walks the ELS transmit queue to remove all the
9211  * IOCBs to the @phba other than the QUE_RING and ABORT/CLOSE IOCBs. For
9212  * the IOCBs with the completion callback function associated, the callback
9213  * function will be invoked with the status set to IOSTAT_LOCAL_REJECT and
9214  * un.ulpWord[4] set to IOERR_SLI_ABORTED. For IOCBs without the completion
9215  * callback function associated, the IOCB will simply be released. Finally,
9216  * it walks the ELS transmit completion queue to issue an abort IOCB to any
9217  * transmit completion queue IOCB that is not an IOCB from libdfc (i.e., the
9218  * management plane IOCBs that are not part of the discovery state machine)
9219  * out to HBA by invoking the lpfc_sli_issue_abort_iotag() routine.
9220  **/
9221 void
9222 lpfc_els_flush_all_cmd(struct lpfc_hba  *phba)
9223 {
9224         struct lpfc_vport *vport;
9225
9226         spin_lock_irq(&phba->port_list_lock);
9227         list_for_each_entry(vport, &phba->port_list, listentry)
9228                 lpfc_els_flush_cmd(vport);
9229         spin_unlock_irq(&phba->port_list_lock);
9230
9231         return;
9232 }
9233
9234 /**
9235  * lpfc_send_els_failure_event - Posts an ELS command failure event
9236  * @phba: Pointer to hba context object.
9237  * @cmdiocbp: Pointer to command iocb which reported error.
9238  * @rspiocbp: Pointer to response iocb which reported error.
9239  *
9240  * This function sends an event when there is an ELS command
9241  * failure.
9242  **/
9243 void
9244 lpfc_send_els_failure_event(struct lpfc_hba *phba,
9245                         struct lpfc_iocbq *cmdiocbp,
9246                         struct lpfc_iocbq *rspiocbp)
9247 {
9248         struct lpfc_vport *vport = cmdiocbp->vport;
9249         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
9250         struct lpfc_lsrjt_event lsrjt_event;
9251         struct lpfc_fabric_event_header fabric_event;
9252         struct ls_rjt stat;
9253         struct lpfc_nodelist *ndlp;
9254         uint32_t *pcmd;
9255
9256         ndlp = cmdiocbp->context1;
9257         if (!ndlp)
9258                 return;
9259
9260         if (rspiocbp->iocb.ulpStatus == IOSTAT_LS_RJT) {
9261                 lsrjt_event.header.event_type = FC_REG_ELS_EVENT;
9262                 lsrjt_event.header.subcategory = LPFC_EVENT_LSRJT_RCV;
9263                 memcpy(lsrjt_event.header.wwpn, &ndlp->nlp_portname,
9264                         sizeof(struct lpfc_name));
9265                 memcpy(lsrjt_event.header.wwnn, &ndlp->nlp_nodename,
9266                         sizeof(struct lpfc_name));
9267                 pcmd = (uint32_t *) (((struct lpfc_dmabuf *)
9268                         cmdiocbp->context2)->virt);
9269                 lsrjt_event.command = (pcmd != NULL) ? *pcmd : 0;
9270                 stat.un.lsRjtError = be32_to_cpu(rspiocbp->iocb.un.ulpWord[4]);
9271                 lsrjt_event.reason_code = stat.un.b.lsRjtRsnCode;
9272                 lsrjt_event.explanation = stat.un.b.lsRjtRsnCodeExp;
9273                 fc_host_post_vendor_event(shost,
9274                         fc_get_event_number(),
9275                         sizeof(lsrjt_event),
9276                         (char *)&lsrjt_event,
9277                         LPFC_NL_VENDOR_ID);
9278                 return;
9279         }
9280         if ((rspiocbp->iocb.ulpStatus == IOSTAT_NPORT_BSY) ||
9281                 (rspiocbp->iocb.ulpStatus == IOSTAT_FABRIC_BSY)) {
9282                 fabric_event.event_type = FC_REG_FABRIC_EVENT;
9283                 if (rspiocbp->iocb.ulpStatus == IOSTAT_NPORT_BSY)
9284                         fabric_event.subcategory = LPFC_EVENT_PORT_BUSY;
9285                 else
9286                         fabric_event.subcategory = LPFC_EVENT_FABRIC_BUSY;
9287                 memcpy(fabric_event.wwpn, &ndlp->nlp_portname,
9288                         sizeof(struct lpfc_name));
9289                 memcpy(fabric_event.wwnn, &ndlp->nlp_nodename,
9290                         sizeof(struct lpfc_name));
9291                 fc_host_post_vendor_event(shost,
9292                         fc_get_event_number(),
9293                         sizeof(fabric_event),
9294                         (char *)&fabric_event,
9295                         LPFC_NL_VENDOR_ID);
9296                 return;
9297         }
9298
9299 }
9300
9301 /**
9302  * lpfc_send_els_event - Posts unsolicited els event
9303  * @vport: Pointer to vport object.
9304  * @ndlp: Pointer FC node object.
9305  * @payload: ELS command code type.
9306  *
9307  * This function posts an event when there is an incoming
9308  * unsolicited ELS command.
9309  **/
9310 static void
9311 lpfc_send_els_event(struct lpfc_vport *vport,
9312                     struct lpfc_nodelist *ndlp,
9313                     uint32_t *payload)
9314 {
9315         struct lpfc_els_event_header *els_data = NULL;
9316         struct lpfc_logo_event *logo_data = NULL;
9317         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
9318
9319         if (*payload == ELS_CMD_LOGO) {
9320                 logo_data = kmalloc(sizeof(struct lpfc_logo_event), GFP_KERNEL);
9321                 if (!logo_data) {
9322                         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
9323                                 "0148 Failed to allocate memory "
9324                                 "for LOGO event\n");
9325                         return;
9326                 }
9327                 els_data = &logo_data->header;
9328         } else {
9329                 els_data = kmalloc(sizeof(struct lpfc_els_event_header),
9330                         GFP_KERNEL);
9331                 if (!els_data) {
9332                         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
9333                                 "0149 Failed to allocate memory "
9334                                 "for ELS event\n");
9335                         return;
9336                 }
9337         }
9338         els_data->event_type = FC_REG_ELS_EVENT;
9339         switch (*payload) {
9340         case ELS_CMD_PLOGI:
9341                 els_data->subcategory = LPFC_EVENT_PLOGI_RCV;
9342                 break;
9343         case ELS_CMD_PRLO:
9344                 els_data->subcategory = LPFC_EVENT_PRLO_RCV;
9345                 break;
9346         case ELS_CMD_ADISC:
9347                 els_data->subcategory = LPFC_EVENT_ADISC_RCV;
9348                 break;
9349         case ELS_CMD_LOGO:
9350                 els_data->subcategory = LPFC_EVENT_LOGO_RCV;
9351                 /* Copy the WWPN in the LOGO payload */
9352                 memcpy(logo_data->logo_wwpn, &payload[2],
9353                         sizeof(struct lpfc_name));
9354                 break;
9355         default:
9356                 kfree(els_data);
9357                 return;
9358         }
9359         memcpy(els_data->wwpn, &ndlp->nlp_portname, sizeof(struct lpfc_name));
9360         memcpy(els_data->wwnn, &ndlp->nlp_nodename, sizeof(struct lpfc_name));
9361         if (*payload == ELS_CMD_LOGO) {
9362                 fc_host_post_vendor_event(shost,
9363                         fc_get_event_number(),
9364                         sizeof(struct lpfc_logo_event),
9365                         (char *)logo_data,
9366                         LPFC_NL_VENDOR_ID);
9367                 kfree(logo_data);
9368         } else {
9369                 fc_host_post_vendor_event(shost,
9370                         fc_get_event_number(),
9371                         sizeof(struct lpfc_els_event_header),
9372                         (char *)els_data,
9373                         LPFC_NL_VENDOR_ID);
9374                 kfree(els_data);
9375         }
9376
9377         return;
9378 }
9379
9380
9381 DECLARE_ENUM2STR_LOOKUP(lpfc_get_fpin_li_event_nm, fc_fpin_li_event_types,
9382                         FC_FPIN_LI_EVT_TYPES_INIT);
9383
9384 DECLARE_ENUM2STR_LOOKUP(lpfc_get_fpin_deli_event_nm, fc_fpin_deli_event_types,
9385                         FC_FPIN_DELI_EVT_TYPES_INIT);
9386
9387 DECLARE_ENUM2STR_LOOKUP(lpfc_get_fpin_congn_event_nm, fc_fpin_congn_event_types,
9388                         FC_FPIN_CONGN_EVT_TYPES_INIT);
9389
9390 DECLARE_ENUM2STR_LOOKUP(lpfc_get_fpin_congn_severity_nm,
9391                         fc_fpin_congn_severity_types,
9392                         FC_FPIN_CONGN_SEVERITY_INIT);
9393
9394
9395 /**
9396  * lpfc_display_fpin_wwpn - Display WWPNs accessible by the attached port
9397  * @phba: Pointer to phba object.
9398  * @wwnlist: Pointer to list of WWPNs in FPIN payload
9399  * @cnt: count of WWPNs in FPIN payload
9400  *
9401  * This routine is called by LI and PC descriptors.
9402  * Limit the number of WWPNs displayed to 6 log messages, 6 per log message
9403  */
9404 static void
9405 lpfc_display_fpin_wwpn(struct lpfc_hba *phba, __be64 *wwnlist, u32 cnt)
9406 {
9407         char buf[LPFC_FPIN_WWPN_LINE_SZ];
9408         __be64 wwn;
9409         u64 wwpn;
9410         int i, len;
9411         int line = 0;
9412         int wcnt = 0;
9413         bool endit = false;
9414
9415         len = scnprintf(buf, LPFC_FPIN_WWPN_LINE_SZ, "Accessible WWPNs:");
9416         for (i = 0; i < cnt; i++) {
9417                 /* Are we on the last WWPN */
9418                 if (i == (cnt - 1))
9419                         endit = true;
9420
9421                 /* Extract the next WWPN from the payload */
9422                 wwn = *wwnlist++;
9423                 wwpn = be64_to_cpu(wwn);
9424                 len += scnprintf(buf + len, LPFC_FPIN_WWPN_LINE_SZ - len,
9425                                  " %016llx", wwpn);
9426
9427                 /* Log a message if we are on the last WWPN
9428                  * or if we hit the max allowed per message.
9429                  */
9430                 wcnt++;
9431                 if (wcnt == LPFC_FPIN_WWPN_LINE_CNT || endit) {
9432                         buf[len] = 0;
9433                         lpfc_printf_log(phba, KERN_INFO, LOG_ELS,
9434                                         "4686 %s\n", buf);
9435
9436                         /* Check if we reached the last WWPN */
9437                         if (endit)
9438                                 return;
9439
9440                         /* Limit the number of log message displayed per FPIN */
9441                         line++;
9442                         if (line == LPFC_FPIN_WWPN_NUM_LINE) {
9443                                 lpfc_printf_log(phba, KERN_INFO, LOG_ELS,
9444                                                 "4687 %d WWPNs Truncated\n",
9445                                                 cnt - i - 1);
9446                                 return;
9447                         }
9448
9449                         /* Start over with next log message */
9450                         wcnt = 0;
9451                         len = scnprintf(buf, LPFC_FPIN_WWPN_LINE_SZ,
9452                                         "Additional WWPNs:");
9453                 }
9454         }
9455 }
9456
9457 /**
9458  * lpfc_els_rcv_fpin_li - Process an FPIN Link Integrity Event.
9459  * @phba: Pointer to phba object.
9460  * @tlv:  Pointer to the Link Integrity Notification Descriptor.
9461  *
9462  * This function processes a Link Integrity FPIN event by logging a message.
9463  **/
9464 static void
9465 lpfc_els_rcv_fpin_li(struct lpfc_hba *phba, struct fc_tlv_desc *tlv)
9466 {
9467         struct fc_fn_li_desc *li = (struct fc_fn_li_desc *)tlv;
9468         const char *li_evt_str;
9469         u32 li_evt, cnt;
9470
9471         li_evt = be16_to_cpu(li->event_type);
9472         li_evt_str = lpfc_get_fpin_li_event_nm(li_evt);
9473         cnt = be32_to_cpu(li->pname_count);
9474
9475         lpfc_printf_log(phba, KERN_INFO, LOG_ELS,
9476                         "4680 FPIN Link Integrity %s (x%x) "
9477                         "Detecting PN x%016llx Attached PN x%016llx "
9478                         "Duration %d mSecs Count %d Port Cnt %d\n",
9479                         li_evt_str, li_evt,
9480                         be64_to_cpu(li->detecting_wwpn),
9481                         be64_to_cpu(li->attached_wwpn),
9482                         be32_to_cpu(li->event_threshold),
9483                         be32_to_cpu(li->event_count), cnt);
9484
9485         lpfc_display_fpin_wwpn(phba, (__be64 *)&li->pname_list, cnt);
9486 }
9487
9488 /**
9489  * lpfc_els_rcv_fpin_del - Process an FPIN Delivery Event.
9490  * @phba: Pointer to hba object.
9491  * @tlv:  Pointer to the Delivery Notification Descriptor TLV
9492  *
9493  * This function processes a Delivery FPIN event by logging a message.
9494  **/
9495 static void
9496 lpfc_els_rcv_fpin_del(struct lpfc_hba *phba, struct fc_tlv_desc *tlv)
9497 {
9498         struct fc_fn_deli_desc *del = (struct fc_fn_deli_desc *)tlv;
9499         const char *del_rsn_str;
9500         u32 del_rsn;
9501         __be32 *frame;
9502
9503         del_rsn = be16_to_cpu(del->deli_reason_code);
9504         del_rsn_str = lpfc_get_fpin_deli_event_nm(del_rsn);
9505
9506         /* Skip over desc_tag/desc_len header to payload */
9507         frame = (__be32 *)(del + 1);
9508
9509         lpfc_printf_log(phba, KERN_INFO, LOG_ELS,
9510                         "4681 FPIN Delivery %s (x%x) "
9511                         "Detecting PN x%016llx Attached PN x%016llx "
9512                         "DiscHdr0  x%08x "
9513                         "DiscHdr1 x%08x DiscHdr2 x%08x DiscHdr3 x%08x "
9514                         "DiscHdr4 x%08x DiscHdr5 x%08x\n",
9515                         del_rsn_str, del_rsn,
9516                         be64_to_cpu(del->detecting_wwpn),
9517                         be64_to_cpu(del->attached_wwpn),
9518                         be32_to_cpu(frame[0]),
9519                         be32_to_cpu(frame[1]),
9520                         be32_to_cpu(frame[2]),
9521                         be32_to_cpu(frame[3]),
9522                         be32_to_cpu(frame[4]),
9523                         be32_to_cpu(frame[5]));
9524 }
9525
9526 /**
9527  * lpfc_els_rcv_fpin_peer_cgn - Process a FPIN Peer Congestion Event.
9528  * @phba: Pointer to hba object.
9529  * @tlv:  Pointer to the Peer Congestion Notification Descriptor TLV
9530  *
9531  * This function processes a Peer Congestion FPIN event by logging a message.
9532  **/
9533 static void
9534 lpfc_els_rcv_fpin_peer_cgn(struct lpfc_hba *phba, struct fc_tlv_desc *tlv)
9535 {
9536         struct fc_fn_peer_congn_desc *pc = (struct fc_fn_peer_congn_desc *)tlv;
9537         const char *pc_evt_str;
9538         u32 pc_evt, cnt;
9539
9540         pc_evt = be16_to_cpu(pc->event_type);
9541         pc_evt_str = lpfc_get_fpin_congn_event_nm(pc_evt);
9542         cnt = be32_to_cpu(pc->pname_count);
9543
9544         lpfc_printf_log(phba, KERN_INFO, LOG_CGN_MGMT | LOG_ELS,
9545                         "4684 FPIN Peer Congestion %s (x%x) "
9546                         "Duration %d mSecs "
9547                         "Detecting PN x%016llx Attached PN x%016llx "
9548                         "Impacted Port Cnt %d\n",
9549                         pc_evt_str, pc_evt,
9550                         be32_to_cpu(pc->event_period),
9551                         be64_to_cpu(pc->detecting_wwpn),
9552                         be64_to_cpu(pc->attached_wwpn),
9553                         cnt);
9554
9555         lpfc_display_fpin_wwpn(phba, (__be64 *)&pc->pname_list, cnt);
9556 }
9557
9558 /**
9559  * lpfc_els_rcv_fpin_cgn - Process an FPIN Congestion notification
9560  * @phba: Pointer to hba object.
9561  * @tlv:  Pointer to the Congestion Notification Descriptor TLV
9562  *
9563  * This function processes an FPIN Congestion Notifiction.  The notification
9564  * could be an Alarm or Warning.  This routine feeds that data into driver's
9565  * running congestion algorithm. It also processes the FPIN by
9566  * logging a message. It returns 1 to indicate deliver this message
9567  * to the upper layer or 0 to indicate don't deliver it.
9568  **/
9569 static int
9570 lpfc_els_rcv_fpin_cgn(struct lpfc_hba *phba, struct fc_tlv_desc *tlv)
9571 {
9572         struct lpfc_cgn_info *cp;
9573         struct fc_fn_congn_desc *cgn = (struct fc_fn_congn_desc *)tlv;
9574         const char *cgn_evt_str;
9575         u32 cgn_evt;
9576         const char *cgn_sev_str;
9577         u32 cgn_sev;
9578         uint16_t value;
9579         u32 crc;
9580         bool nm_log = false;
9581         int rc = 1;
9582
9583         cgn_evt = be16_to_cpu(cgn->event_type);
9584         cgn_evt_str = lpfc_get_fpin_congn_event_nm(cgn_evt);
9585         cgn_sev = cgn->severity;
9586         cgn_sev_str = lpfc_get_fpin_congn_severity_nm(cgn_sev);
9587
9588         /* The driver only takes action on a Credit Stall or Oversubscription
9589          * event type to engage the IO algorithm.  The driver prints an
9590          * unmaskable message only for Lost Credit and Credit Stall.
9591          * TODO: Still need to have definition of host action on clear,
9592          *       lost credit and device specific event types.
9593          */
9594         switch (cgn_evt) {
9595         case FPIN_CONGN_LOST_CREDIT:
9596                 nm_log = true;
9597                 break;
9598         case FPIN_CONGN_CREDIT_STALL:
9599                 nm_log = true;
9600                 fallthrough;
9601         case FPIN_CONGN_OVERSUBSCRIPTION:
9602                 if (cgn_evt == FPIN_CONGN_OVERSUBSCRIPTION)
9603                         nm_log = false;
9604                 switch (cgn_sev) {
9605                 case FPIN_CONGN_SEVERITY_ERROR:
9606                         /* Take action here for an Alarm event */
9607                         if (phba->cmf_active_mode != LPFC_CFG_OFF) {
9608                                 if (phba->cgn_reg_fpin & LPFC_CGN_FPIN_ALARM) {
9609                                         /* Track of alarm cnt for cgn_info */
9610                                         atomic_inc(&phba->cgn_fabric_alarm_cnt);
9611                                         /* Track of alarm cnt for SYNC_WQE */
9612                                         atomic_inc(&phba->cgn_sync_alarm_cnt);
9613                                 }
9614                                 goto cleanup;
9615                         }
9616                         break;
9617                 case FPIN_CONGN_SEVERITY_WARNING:
9618                         /* Take action here for a Warning event */
9619                         if (phba->cmf_active_mode != LPFC_CFG_OFF) {
9620                                 if (phba->cgn_reg_fpin & LPFC_CGN_FPIN_WARN) {
9621                                         /* Track of warning cnt for cgn_info */
9622                                         atomic_inc(&phba->cgn_fabric_warn_cnt);
9623                                         /* Track of warning cnt for SYNC_WQE */
9624                                         atomic_inc(&phba->cgn_sync_warn_cnt);
9625                                 }
9626 cleanup:
9627                                 /* Save frequency in ms */
9628                                 phba->cgn_fpin_frequency =
9629                                         be32_to_cpu(cgn->event_period);
9630                                 value = phba->cgn_fpin_frequency;
9631                                 if (phba->cgn_i) {
9632                                         cp = (struct lpfc_cgn_info *)
9633                                                 phba->cgn_i->virt;
9634                                         if (phba->cgn_reg_fpin &
9635                                                 LPFC_CGN_FPIN_ALARM)
9636                                                 cp->cgn_alarm_freq =
9637                                                         cpu_to_le16(value);
9638                                         if (phba->cgn_reg_fpin &
9639                                                 LPFC_CGN_FPIN_WARN)
9640                                                 cp->cgn_warn_freq =
9641                                                         cpu_to_le16(value);
9642                                         crc = lpfc_cgn_calc_crc32
9643                                                 (cp,
9644                                                 LPFC_CGN_INFO_SZ,
9645                                                 LPFC_CGN_CRC32_SEED);
9646                                         cp->cgn_info_crc = cpu_to_le32(crc);
9647                                 }
9648
9649                                 /* Don't deliver to upper layer since
9650                                  * driver took action on this tlv.
9651                                  */
9652                                 rc = 0;
9653                         }
9654                         break;
9655                 }
9656                 break;
9657         }
9658
9659         /* Change the log level to unmaskable for the following event types. */
9660         lpfc_printf_log(phba, (nm_log ? KERN_WARNING : KERN_INFO),
9661                         LOG_CGN_MGMT | LOG_ELS,
9662                         "4683 FPIN CONGESTION %s type %s (x%x) Event "
9663                         "Duration %d mSecs\n",
9664                         cgn_sev_str, cgn_evt_str, cgn_evt,
9665                         be32_to_cpu(cgn->event_period));
9666         return rc;
9667 }
9668
9669 void
9670 lpfc_els_rcv_fpin(struct lpfc_vport *vport, void *p, u32 fpin_length)
9671 {
9672         struct lpfc_hba *phba = vport->phba;
9673         struct fc_els_fpin *fpin = (struct fc_els_fpin *)p;
9674         struct fc_tlv_desc *tlv, *first_tlv, *current_tlv;
9675         const char *dtag_nm;
9676         int desc_cnt = 0, bytes_remain, cnt;
9677         u32 dtag, deliver = 0;
9678         int len;
9679
9680         /* FPINs handled only if we are in the right discovery state */
9681         if (vport->port_state < LPFC_DISC_AUTH)
9682                 return;
9683
9684         /* make sure there is the full fpin header */
9685         if (fpin_length < sizeof(struct fc_els_fpin))
9686                 return;
9687
9688         /* Sanity check descriptor length. The desc_len value does not
9689          * include space for the ELS command and the desc_len fields.
9690          */
9691         len = be32_to_cpu(fpin->desc_len);
9692         if (fpin_length < len + sizeof(struct fc_els_fpin)) {
9693                 lpfc_printf_log(phba, KERN_WARNING, LOG_CGN_MGMT,
9694                                 "4671 Bad ELS FPIN length %d: %d\n",
9695                                 len, fpin_length);
9696                 return;
9697         }
9698
9699         tlv = (struct fc_tlv_desc *)&fpin->fpin_desc[0];
9700         first_tlv = tlv;
9701         bytes_remain = fpin_length - offsetof(struct fc_els_fpin, fpin_desc);
9702         bytes_remain = min_t(u32, bytes_remain, be32_to_cpu(fpin->desc_len));
9703
9704         /* process each descriptor separately */
9705         while (bytes_remain >= FC_TLV_DESC_HDR_SZ &&
9706                bytes_remain >= FC_TLV_DESC_SZ_FROM_LENGTH(tlv)) {
9707                 dtag = be32_to_cpu(tlv->desc_tag);
9708                 switch (dtag) {
9709                 case ELS_DTAG_LNK_INTEGRITY:
9710                         lpfc_els_rcv_fpin_li(phba, tlv);
9711                         deliver = 1;
9712                         break;
9713                 case ELS_DTAG_DELIVERY:
9714                         lpfc_els_rcv_fpin_del(phba, tlv);
9715                         deliver = 1;
9716                         break;
9717                 case ELS_DTAG_PEER_CONGEST:
9718                         lpfc_els_rcv_fpin_peer_cgn(phba, tlv);
9719                         deliver = 1;
9720                         break;
9721                 case ELS_DTAG_CONGESTION:
9722                         deliver = lpfc_els_rcv_fpin_cgn(phba, tlv);
9723                         break;
9724                 default:
9725                         dtag_nm = lpfc_get_tlv_dtag_nm(dtag);
9726                         lpfc_printf_log(phba, KERN_WARNING, LOG_CGN_MGMT,
9727                                         "4678 unknown FPIN descriptor[%d]: "
9728                                         "tag x%x (%s)\n",
9729                                         desc_cnt, dtag, dtag_nm);
9730
9731                         /* If descriptor is bad, drop the rest of the data */
9732                         return;
9733                 }
9734                 lpfc_cgn_update_stat(phba, dtag);
9735                 cnt = be32_to_cpu(tlv->desc_len);
9736
9737                 /* Sanity check descriptor length. The desc_len value does not
9738                  * include space for the desc_tag and the desc_len fields.
9739                  */
9740                 len -= (cnt + sizeof(struct fc_tlv_desc));
9741                 if (len < 0) {
9742                         dtag_nm = lpfc_get_tlv_dtag_nm(dtag);
9743                         lpfc_printf_log(phba, KERN_WARNING, LOG_CGN_MGMT,
9744                                         "4672 Bad FPIN descriptor TLV length "
9745                                         "%d: %d %d %s\n",
9746                                         cnt, len, fpin_length, dtag_nm);
9747                         return;
9748                 }
9749
9750                 current_tlv = tlv;
9751                 bytes_remain -= FC_TLV_DESC_SZ_FROM_LENGTH(tlv);
9752                 tlv = fc_tlv_next_desc(tlv);
9753
9754                 /* Format payload such that the FPIN delivered to the
9755                  * upper layer is a single descriptor FPIN.
9756                  */
9757                 if (desc_cnt)
9758                         memcpy(first_tlv, current_tlv,
9759                                (cnt + sizeof(struct fc_els_fpin)));
9760
9761                 /* Adjust the length so that it only reflects a
9762                  * single descriptor FPIN.
9763                  */
9764                 fpin_length = cnt + sizeof(struct fc_els_fpin);
9765                 fpin->desc_len = cpu_to_be32(fpin_length);
9766                 fpin_length += sizeof(struct fc_els_fpin); /* the entire FPIN */
9767
9768                 /* Send every descriptor individually to the upper layer */
9769                 if (deliver)
9770                         fc_host_fpin_rcv(lpfc_shost_from_vport(vport),
9771                                          fpin_length, (char *)fpin);
9772                 desc_cnt++;
9773         }
9774 }
9775
9776 /**
9777  * lpfc_els_unsol_buffer - Process an unsolicited event data buffer
9778  * @phba: pointer to lpfc hba data structure.
9779  * @pring: pointer to a SLI ring.
9780  * @vport: pointer to a host virtual N_Port data structure.
9781  * @elsiocb: pointer to lpfc els command iocb data structure.
9782  *
9783  * This routine is used for processing the IOCB associated with a unsolicited
9784  * event. It first determines whether there is an existing ndlp that matches
9785  * the DID from the unsolicited IOCB. If not, it will create a new one with
9786  * the DID from the unsolicited IOCB. The ELS command from the unsolicited
9787  * IOCB is then used to invoke the proper routine and to set up proper state
9788  * of the discovery state machine.
9789  **/
9790 static void
9791 lpfc_els_unsol_buffer(struct lpfc_hba *phba, struct lpfc_sli_ring *pring,
9792                       struct lpfc_vport *vport, struct lpfc_iocbq *elsiocb)
9793 {
9794         struct lpfc_nodelist *ndlp;
9795         struct ls_rjt stat;
9796         uint32_t *payload, payload_len;
9797         uint32_t cmd, did, newnode;
9798         uint8_t rjt_exp, rjt_err = 0, init_link = 0;
9799         IOCB_t *icmd = &elsiocb->iocb;
9800         LPFC_MBOXQ_t *mbox;
9801
9802         if (!vport || !(elsiocb->context2))
9803                 goto dropit;
9804
9805         newnode = 0;
9806         payload = ((struct lpfc_dmabuf *)elsiocb->context2)->virt;
9807         payload_len = elsiocb->iocb.unsli3.rcvsli3.acc_len;
9808         cmd = *payload;
9809         if ((phba->sli3_options & LPFC_SLI3_HBQ_ENABLED) == 0)
9810                 lpfc_post_buffer(phba, pring, 1);
9811
9812         did = icmd->un.rcvels.remoteID;
9813         if (icmd->ulpStatus) {
9814                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
9815                         "RCV Unsol ELS:  status:x%x/x%x did:x%x",
9816                         icmd->ulpStatus, icmd->un.ulpWord[4], did);
9817                 goto dropit;
9818         }
9819
9820         /* Check to see if link went down during discovery */
9821         if (lpfc_els_chk_latt(vport))
9822                 goto dropit;
9823
9824         /* Ignore traffic received during vport shutdown. */
9825         if (vport->load_flag & FC_UNLOADING)
9826                 goto dropit;
9827
9828         /* If NPort discovery is delayed drop incoming ELS */
9829         if ((vport->fc_flag & FC_DISC_DELAYED) &&
9830                         (cmd != ELS_CMD_PLOGI))
9831                 goto dropit;
9832
9833         ndlp = lpfc_findnode_did(vport, did);
9834         if (!ndlp) {
9835                 /* Cannot find existing Fabric ndlp, so allocate a new one */
9836                 ndlp = lpfc_nlp_init(vport, did);
9837                 if (!ndlp)
9838                         goto dropit;
9839                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
9840                 newnode = 1;
9841                 if ((did & Fabric_DID_MASK) == Fabric_DID_MASK)
9842                         ndlp->nlp_type |= NLP_FABRIC;
9843         } else if (ndlp->nlp_state == NLP_STE_UNUSED_NODE) {
9844                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
9845                 newnode = 1;
9846         }
9847
9848         phba->fc_stat.elsRcvFrame++;
9849
9850         /*
9851          * Do not process any unsolicited ELS commands
9852          * if the ndlp is in DEV_LOSS
9853          */
9854         spin_lock_irq(&ndlp->lock);
9855         if (ndlp->nlp_flag & NLP_IN_DEV_LOSS) {
9856                 spin_unlock_irq(&ndlp->lock);
9857                 if (newnode)
9858                         lpfc_nlp_put(ndlp);
9859                 goto dropit;
9860         }
9861         spin_unlock_irq(&ndlp->lock);
9862
9863         elsiocb->context1 = lpfc_nlp_get(ndlp);
9864         if (!elsiocb->context1)
9865                 goto dropit;
9866         elsiocb->vport = vport;
9867
9868         if ((cmd & ELS_CMD_MASK) == ELS_CMD_RSCN) {
9869                 cmd &= ELS_CMD_MASK;
9870         }
9871         /* ELS command <elsCmd> received from NPORT <did> */
9872         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
9873                          "0112 ELS command x%x received from NPORT x%x "
9874                          "refcnt %d Data: x%x x%x x%x x%x\n",
9875                          cmd, did, kref_read(&ndlp->kref), vport->port_state,
9876                          vport->fc_flag, vport->fc_myDID, vport->fc_prevDID);
9877
9878         /* reject till our FLOGI completes or PLOGI assigned DID via PT2PT */
9879         if ((vport->port_state < LPFC_FABRIC_CFG_LINK) &&
9880             (cmd != ELS_CMD_FLOGI) &&
9881             !((cmd == ELS_CMD_PLOGI) && (vport->fc_flag & FC_PT2PT))) {
9882                 rjt_err = LSRJT_LOGICAL_BSY;
9883                 rjt_exp = LSEXP_NOTHING_MORE;
9884                 goto lsrjt;
9885         }
9886
9887         switch (cmd) {
9888         case ELS_CMD_PLOGI:
9889                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
9890                         "RCV PLOGI:       did:x%x/ste:x%x flg:x%x",
9891                         did, vport->port_state, ndlp->nlp_flag);
9892
9893                 phba->fc_stat.elsRcvPLOGI++;
9894                 ndlp = lpfc_plogi_confirm_nport(phba, payload, ndlp);
9895                 if (phba->sli_rev == LPFC_SLI_REV4 &&
9896                     (phba->pport->fc_flag & FC_PT2PT)) {
9897                         vport->fc_prevDID = vport->fc_myDID;
9898                         /* Our DID needs to be updated before registering
9899                          * the vfi. This is done in lpfc_rcv_plogi but
9900                          * that is called after the reg_vfi.
9901                          */
9902                         vport->fc_myDID = elsiocb->iocb.un.rcvels.parmRo;
9903                         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
9904                                          "3312 Remote port assigned DID x%x "
9905                                          "%x\n", vport->fc_myDID,
9906                                          vport->fc_prevDID);
9907                 }
9908
9909                 lpfc_send_els_event(vport, ndlp, payload);
9910
9911                 /* If Nport discovery is delayed, reject PLOGIs */
9912                 if (vport->fc_flag & FC_DISC_DELAYED) {
9913                         rjt_err = LSRJT_UNABLE_TPC;
9914                         rjt_exp = LSEXP_NOTHING_MORE;
9915                         break;
9916                 }
9917
9918                 if (vport->port_state < LPFC_DISC_AUTH) {
9919                         if (!(phba->pport->fc_flag & FC_PT2PT) ||
9920                                 (phba->pport->fc_flag & FC_PT2PT_PLOGI)) {
9921                                 rjt_err = LSRJT_UNABLE_TPC;
9922                                 rjt_exp = LSEXP_NOTHING_MORE;
9923                                 break;
9924                         }
9925                 }
9926
9927                 spin_lock_irq(&ndlp->lock);
9928                 ndlp->nlp_flag &= ~NLP_TARGET_REMOVE;
9929                 spin_unlock_irq(&ndlp->lock);
9930
9931                 lpfc_disc_state_machine(vport, ndlp, elsiocb,
9932                                         NLP_EVT_RCV_PLOGI);
9933
9934                 break;
9935         case ELS_CMD_FLOGI:
9936                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
9937                         "RCV FLOGI:       did:x%x/ste:x%x flg:x%x",
9938                         did, vport->port_state, ndlp->nlp_flag);
9939
9940                 phba->fc_stat.elsRcvFLOGI++;
9941
9942                 /* If the driver believes fabric discovery is done and is ready,
9943                  * bounce the link.  There is some descrepancy.
9944                  */
9945                 if (vport->port_state >= LPFC_LOCAL_CFG_LINK &&
9946                     vport->fc_flag & FC_PT2PT &&
9947                     vport->rcv_flogi_cnt >= 1) {
9948                         rjt_err = LSRJT_LOGICAL_BSY;
9949                         rjt_exp = LSEXP_NOTHING_MORE;
9950                         init_link++;
9951                         goto lsrjt;
9952                 }
9953
9954                 lpfc_els_rcv_flogi(vport, elsiocb, ndlp);
9955                 if (newnode)
9956                         lpfc_disc_state_machine(vport, ndlp, NULL,
9957                                         NLP_EVT_DEVICE_RM);
9958                 break;
9959         case ELS_CMD_LOGO:
9960                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
9961                         "RCV LOGO:        did:x%x/ste:x%x flg:x%x",
9962                         did, vport->port_state, ndlp->nlp_flag);
9963
9964                 phba->fc_stat.elsRcvLOGO++;
9965                 lpfc_send_els_event(vport, ndlp, payload);
9966                 if (vport->port_state < LPFC_DISC_AUTH) {
9967                         rjt_err = LSRJT_UNABLE_TPC;
9968                         rjt_exp = LSEXP_NOTHING_MORE;
9969                         break;
9970                 }
9971                 lpfc_disc_state_machine(vport, ndlp, elsiocb, NLP_EVT_RCV_LOGO);
9972                 if (newnode)
9973                         lpfc_disc_state_machine(vport, ndlp, NULL,
9974                                         NLP_EVT_DEVICE_RM);
9975                 break;
9976         case ELS_CMD_PRLO:
9977                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
9978                         "RCV PRLO:        did:x%x/ste:x%x flg:x%x",
9979                         did, vport->port_state, ndlp->nlp_flag);
9980
9981                 phba->fc_stat.elsRcvPRLO++;
9982                 lpfc_send_els_event(vport, ndlp, payload);
9983                 if (vport->port_state < LPFC_DISC_AUTH) {
9984                         rjt_err = LSRJT_UNABLE_TPC;
9985                         rjt_exp = LSEXP_NOTHING_MORE;
9986                         break;
9987                 }
9988                 lpfc_disc_state_machine(vport, ndlp, elsiocb, NLP_EVT_RCV_PRLO);
9989                 break;
9990         case ELS_CMD_LCB:
9991                 phba->fc_stat.elsRcvLCB++;
9992                 lpfc_els_rcv_lcb(vport, elsiocb, ndlp);
9993                 break;
9994         case ELS_CMD_RDP:
9995                 phba->fc_stat.elsRcvRDP++;
9996                 lpfc_els_rcv_rdp(vport, elsiocb, ndlp);
9997                 break;
9998         case ELS_CMD_RSCN:
9999                 phba->fc_stat.elsRcvRSCN++;
10000                 lpfc_els_rcv_rscn(vport, elsiocb, ndlp);
10001                 if (newnode)
10002                         lpfc_disc_state_machine(vport, ndlp, NULL,
10003                                         NLP_EVT_DEVICE_RM);
10004                 break;
10005         case ELS_CMD_ADISC:
10006                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10007                         "RCV ADISC:       did:x%x/ste:x%x flg:x%x",
10008                         did, vport->port_state, ndlp->nlp_flag);
10009
10010                 lpfc_send_els_event(vport, ndlp, payload);
10011                 phba->fc_stat.elsRcvADISC++;
10012                 if (vport->port_state < LPFC_DISC_AUTH) {
10013                         rjt_err = LSRJT_UNABLE_TPC;
10014                         rjt_exp = LSEXP_NOTHING_MORE;
10015                         break;
10016                 }
10017                 lpfc_disc_state_machine(vport, ndlp, elsiocb,
10018                                         NLP_EVT_RCV_ADISC);
10019                 break;
10020         case ELS_CMD_PDISC:
10021                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10022                         "RCV PDISC:       did:x%x/ste:x%x flg:x%x",
10023                         did, vport->port_state, ndlp->nlp_flag);
10024
10025                 phba->fc_stat.elsRcvPDISC++;
10026                 if (vport->port_state < LPFC_DISC_AUTH) {
10027                         rjt_err = LSRJT_UNABLE_TPC;
10028                         rjt_exp = LSEXP_NOTHING_MORE;
10029                         break;
10030                 }
10031                 lpfc_disc_state_machine(vport, ndlp, elsiocb,
10032                                         NLP_EVT_RCV_PDISC);
10033                 break;
10034         case ELS_CMD_FARPR:
10035                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10036                         "RCV FARPR:       did:x%x/ste:x%x flg:x%x",
10037                         did, vport->port_state, ndlp->nlp_flag);
10038
10039                 phba->fc_stat.elsRcvFARPR++;
10040                 lpfc_els_rcv_farpr(vport, elsiocb, ndlp);
10041                 break;
10042         case ELS_CMD_FARP:
10043                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10044                         "RCV FARP:        did:x%x/ste:x%x flg:x%x",
10045                         did, vport->port_state, ndlp->nlp_flag);
10046
10047                 phba->fc_stat.elsRcvFARP++;
10048                 lpfc_els_rcv_farp(vport, elsiocb, ndlp);
10049                 break;
10050         case ELS_CMD_FAN:
10051                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10052                         "RCV FAN:         did:x%x/ste:x%x flg:x%x",
10053                         did, vport->port_state, ndlp->nlp_flag);
10054
10055                 phba->fc_stat.elsRcvFAN++;
10056                 lpfc_els_rcv_fan(vport, elsiocb, ndlp);
10057                 break;
10058         case ELS_CMD_PRLI:
10059         case ELS_CMD_NVMEPRLI:
10060                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10061                         "RCV PRLI:        did:x%x/ste:x%x flg:x%x",
10062                         did, vport->port_state, ndlp->nlp_flag);
10063
10064                 phba->fc_stat.elsRcvPRLI++;
10065                 if ((vport->port_state < LPFC_DISC_AUTH) &&
10066                     (vport->fc_flag & FC_FABRIC)) {
10067                         rjt_err = LSRJT_UNABLE_TPC;
10068                         rjt_exp = LSEXP_NOTHING_MORE;
10069                         break;
10070                 }
10071                 lpfc_disc_state_machine(vport, ndlp, elsiocb, NLP_EVT_RCV_PRLI);
10072                 break;
10073         case ELS_CMD_LIRR:
10074                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10075                         "RCV LIRR:        did:x%x/ste:x%x flg:x%x",
10076                         did, vport->port_state, ndlp->nlp_flag);
10077
10078                 phba->fc_stat.elsRcvLIRR++;
10079                 lpfc_els_rcv_lirr(vport, elsiocb, ndlp);
10080                 if (newnode)
10081                         lpfc_disc_state_machine(vport, ndlp, NULL,
10082                                         NLP_EVT_DEVICE_RM);
10083                 break;
10084         case ELS_CMD_RLS:
10085                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10086                         "RCV RLS:         did:x%x/ste:x%x flg:x%x",
10087                         did, vport->port_state, ndlp->nlp_flag);
10088
10089                 phba->fc_stat.elsRcvRLS++;
10090                 lpfc_els_rcv_rls(vport, elsiocb, ndlp);
10091                 if (newnode)
10092                         lpfc_disc_state_machine(vport, ndlp, NULL,
10093                                         NLP_EVT_DEVICE_RM);
10094                 break;
10095         case ELS_CMD_RPL:
10096                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10097                         "RCV RPL:         did:x%x/ste:x%x flg:x%x",
10098                         did, vport->port_state, ndlp->nlp_flag);
10099
10100                 phba->fc_stat.elsRcvRPL++;
10101                 lpfc_els_rcv_rpl(vport, elsiocb, ndlp);
10102                 if (newnode)
10103                         lpfc_disc_state_machine(vport, ndlp, NULL,
10104                                         NLP_EVT_DEVICE_RM);
10105                 break;
10106         case ELS_CMD_RNID:
10107                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10108                         "RCV RNID:        did:x%x/ste:x%x flg:x%x",
10109                         did, vport->port_state, ndlp->nlp_flag);
10110
10111                 phba->fc_stat.elsRcvRNID++;
10112                 lpfc_els_rcv_rnid(vport, elsiocb, ndlp);
10113                 if (newnode)
10114                         lpfc_disc_state_machine(vport, ndlp, NULL,
10115                                         NLP_EVT_DEVICE_RM);
10116                 break;
10117         case ELS_CMD_RTV:
10118                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10119                         "RCV RTV:        did:x%x/ste:x%x flg:x%x",
10120                         did, vport->port_state, ndlp->nlp_flag);
10121                 phba->fc_stat.elsRcvRTV++;
10122                 lpfc_els_rcv_rtv(vport, elsiocb, ndlp);
10123                 if (newnode)
10124                         lpfc_disc_state_machine(vport, ndlp, NULL,
10125                                         NLP_EVT_DEVICE_RM);
10126                 break;
10127         case ELS_CMD_RRQ:
10128                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10129                         "RCV RRQ:         did:x%x/ste:x%x flg:x%x",
10130                         did, vport->port_state, ndlp->nlp_flag);
10131
10132                 phba->fc_stat.elsRcvRRQ++;
10133                 lpfc_els_rcv_rrq(vport, elsiocb, ndlp);
10134                 if (newnode)
10135                         lpfc_disc_state_machine(vport, ndlp, NULL,
10136                                         NLP_EVT_DEVICE_RM);
10137                 break;
10138         case ELS_CMD_ECHO:
10139                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10140                         "RCV ECHO:        did:x%x/ste:x%x flg:x%x",
10141                         did, vport->port_state, ndlp->nlp_flag);
10142
10143                 phba->fc_stat.elsRcvECHO++;
10144                 lpfc_els_rcv_echo(vport, elsiocb, ndlp);
10145                 if (newnode)
10146                         lpfc_disc_state_machine(vport, ndlp, NULL,
10147                                         NLP_EVT_DEVICE_RM);
10148                 break;
10149         case ELS_CMD_REC:
10150                 /* receive this due to exchange closed */
10151                 rjt_err = LSRJT_UNABLE_TPC;
10152                 rjt_exp = LSEXP_INVALID_OX_RX;
10153                 break;
10154         case ELS_CMD_FPIN:
10155                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10156                                       "RCV FPIN:       did:x%x/ste:x%x flg:x%x",
10157                                       did, vport->port_state, ndlp->nlp_flag);
10158
10159                 lpfc_els_rcv_fpin(vport, (struct fc_els_fpin *)payload,
10160                                   payload_len);
10161
10162                 /* There are no replies, so no rjt codes */
10163                 break;
10164         case ELS_CMD_EDC:
10165                 lpfc_els_rcv_edc(vport, elsiocb, ndlp);
10166                 break;
10167         case ELS_CMD_RDF:
10168                 phba->fc_stat.elsRcvRDF++;
10169                 /* Accept RDF only from fabric controller */
10170                 if (did != Fabric_Cntl_DID) {
10171                         lpfc_printf_vlog(vport, KERN_WARNING, LOG_ELS,
10172                                          "1115 Received RDF from invalid DID "
10173                                          "x%x\n", did);
10174                         rjt_err = LSRJT_PROTOCOL_ERR;
10175                         rjt_exp = LSEXP_NOTHING_MORE;
10176                         goto lsrjt;
10177                 }
10178
10179                 lpfc_els_rcv_rdf(vport, elsiocb, ndlp);
10180                 break;
10181         default:
10182                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_UNSOL,
10183                         "RCV ELS cmd:     cmd:x%x did:x%x/ste:x%x",
10184                         cmd, did, vport->port_state);
10185
10186                 /* Unsupported ELS command, reject */
10187                 rjt_err = LSRJT_CMD_UNSUPPORTED;
10188                 rjt_exp = LSEXP_NOTHING_MORE;
10189
10190                 /* Unknown ELS command <elsCmd> received from NPORT <did> */
10191                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
10192                                  "0115 Unknown ELS command x%x "
10193                                  "received from NPORT x%x\n", cmd, did);
10194                 if (newnode)
10195                         lpfc_disc_state_machine(vport, ndlp, NULL,
10196                                         NLP_EVT_DEVICE_RM);
10197                 break;
10198         }
10199
10200 lsrjt:
10201         /* check if need to LS_RJT received ELS cmd */
10202         if (rjt_err) {
10203                 memset(&stat, 0, sizeof(stat));
10204                 stat.un.b.lsRjtRsnCode = rjt_err;
10205                 stat.un.b.lsRjtRsnCodeExp = rjt_exp;
10206                 lpfc_els_rsp_reject(vport, stat.un.lsRjtError, elsiocb, ndlp,
10207                                     NULL);
10208                 /* Remove the reference from above for new nodes. */
10209                 if (newnode)
10210                         lpfc_disc_state_machine(vport, ndlp, NULL,
10211                                         NLP_EVT_DEVICE_RM);
10212         }
10213
10214         /* Release the reference on this elsiocb, not the ndlp. */
10215         lpfc_nlp_put(elsiocb->context1);
10216         elsiocb->context1 = NULL;
10217
10218         /* Special case.  Driver received an unsolicited command that
10219          * unsupportable given the driver's current state.  Reset the
10220          * link and start over.
10221          */
10222         if (init_link) {
10223                 mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
10224                 if (!mbox)
10225                         return;
10226                 lpfc_linkdown(phba);
10227                 lpfc_init_link(phba, mbox,
10228                                phba->cfg_topology,
10229                                phba->cfg_link_speed);
10230                 mbox->u.mb.un.varInitLnk.lipsr_AL_PA = 0;
10231                 mbox->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
10232                 mbox->vport = vport;
10233                 if (lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT) ==
10234                     MBX_NOT_FINISHED)
10235                         mempool_free(mbox, phba->mbox_mem_pool);
10236         }
10237
10238         return;
10239
10240 dropit:
10241         if (vport && !(vport->load_flag & FC_UNLOADING))
10242                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
10243                         "0111 Dropping received ELS cmd "
10244                         "Data: x%x x%x x%x\n",
10245                         icmd->ulpStatus, icmd->un.ulpWord[4], icmd->ulpTimeout);
10246         phba->fc_stat.elsRcvDrop++;
10247 }
10248
10249 /**
10250  * lpfc_els_unsol_event - Process an unsolicited event from an els sli ring
10251  * @phba: pointer to lpfc hba data structure.
10252  * @pring: pointer to a SLI ring.
10253  * @elsiocb: pointer to lpfc els iocb data structure.
10254  *
10255  * This routine is used to process an unsolicited event received from a SLI
10256  * (Service Level Interface) ring. The actual processing of the data buffer
10257  * associated with the unsolicited event is done by invoking the routine
10258  * lpfc_els_unsol_buffer() after properly set up the iocb buffer from the
10259  * SLI ring on which the unsolicited event was received.
10260  **/
10261 void
10262 lpfc_els_unsol_event(struct lpfc_hba *phba, struct lpfc_sli_ring *pring,
10263                      struct lpfc_iocbq *elsiocb)
10264 {
10265         struct lpfc_vport *vport = phba->pport;
10266         IOCB_t *icmd = &elsiocb->iocb;
10267         dma_addr_t paddr;
10268         struct lpfc_dmabuf *bdeBuf1 = elsiocb->context2;
10269         struct lpfc_dmabuf *bdeBuf2 = elsiocb->context3;
10270
10271         elsiocb->context1 = NULL;
10272         elsiocb->context2 = NULL;
10273         elsiocb->context3 = NULL;
10274
10275         if (icmd->ulpStatus == IOSTAT_NEED_BUFFER) {
10276                 lpfc_sli_hbqbuf_add_hbqs(phba, LPFC_ELS_HBQ);
10277         } else if (icmd->ulpStatus == IOSTAT_LOCAL_REJECT &&
10278                    (icmd->un.ulpWord[4] & IOERR_PARAM_MASK) ==
10279                    IOERR_RCV_BUFFER_WAITING) {
10280                 phba->fc_stat.NoRcvBuf++;
10281                 /* Not enough posted buffers; Try posting more buffers */
10282                 if (!(phba->sli3_options & LPFC_SLI3_HBQ_ENABLED))
10283                         lpfc_post_buffer(phba, pring, 0);
10284                 return;
10285         }
10286
10287         if ((phba->sli3_options & LPFC_SLI3_NPIV_ENABLED) &&
10288             (icmd->ulpCommand == CMD_IOCB_RCV_ELS64_CX ||
10289              icmd->ulpCommand == CMD_IOCB_RCV_SEQ64_CX)) {
10290                 if (icmd->unsli3.rcvsli3.vpi == 0xffff)
10291                         vport = phba->pport;
10292                 else
10293                         vport = lpfc_find_vport_by_vpid(phba,
10294                                                 icmd->unsli3.rcvsli3.vpi);
10295         }
10296
10297         /* If there are no BDEs associated
10298          * with this IOCB, there is nothing to do.
10299          */
10300         if (icmd->ulpBdeCount == 0)
10301                 return;
10302
10303         /* type of ELS cmd is first 32bit word
10304          * in packet
10305          */
10306         if (phba->sli3_options & LPFC_SLI3_HBQ_ENABLED) {
10307                 elsiocb->context2 = bdeBuf1;
10308         } else {
10309                 paddr = getPaddr(icmd->un.cont64[0].addrHigh,
10310                                  icmd->un.cont64[0].addrLow);
10311                 elsiocb->context2 = lpfc_sli_ringpostbuf_get(phba, pring,
10312                                                              paddr);
10313         }
10314
10315         lpfc_els_unsol_buffer(phba, pring, vport, elsiocb);
10316         /*
10317          * The different unsolicited event handlers would tell us
10318          * if they are done with "mp" by setting context2 to NULL.
10319          */
10320         if (elsiocb->context2) {
10321                 lpfc_in_buf_free(phba, (struct lpfc_dmabuf *)elsiocb->context2);
10322                 elsiocb->context2 = NULL;
10323         }
10324
10325         /* RCV_ELS64_CX provide for 2 BDEs - process 2nd if included */
10326         if ((phba->sli3_options & LPFC_SLI3_HBQ_ENABLED) &&
10327             icmd->ulpBdeCount == 2) {
10328                 elsiocb->context2 = bdeBuf2;
10329                 lpfc_els_unsol_buffer(phba, pring, vport, elsiocb);
10330                 /* free mp if we are done with it */
10331                 if (elsiocb->context2) {
10332                         lpfc_in_buf_free(phba, elsiocb->context2);
10333                         elsiocb->context2 = NULL;
10334                 }
10335         }
10336 }
10337
10338 static void
10339 lpfc_start_fdmi(struct lpfc_vport *vport)
10340 {
10341         struct lpfc_nodelist *ndlp;
10342
10343         /* If this is the first time, allocate an ndlp and initialize
10344          * it. Otherwise, make sure the node is enabled and then do the
10345          * login.
10346          */
10347         ndlp = lpfc_findnode_did(vport, FDMI_DID);
10348         if (!ndlp) {
10349                 ndlp = lpfc_nlp_init(vport, FDMI_DID);
10350                 if (ndlp) {
10351                         ndlp->nlp_type |= NLP_FABRIC;
10352                 } else {
10353                         return;
10354                 }
10355         }
10356
10357         lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
10358         lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0);
10359 }
10360
10361 /**
10362  * lpfc_do_scr_ns_plogi - Issue a plogi to the name server for scr
10363  * @phba: pointer to lpfc hba data structure.
10364  * @vport: pointer to a virtual N_Port data structure.
10365  *
10366  * This routine issues a Port Login (PLOGI) to the Name Server with
10367  * State Change Request (SCR) for a @vport. This routine will create an
10368  * ndlp for the Name Server associated to the @vport if such node does
10369  * not already exist. The PLOGI to Name Server is issued by invoking the
10370  * lpfc_issue_els_plogi() routine. If Fabric-Device Management Interface
10371  * (FDMI) is configured to the @vport, a FDMI node will be created and
10372  * the PLOGI to FDMI is issued by invoking lpfc_issue_els_plogi() routine.
10373  **/
10374 void
10375 lpfc_do_scr_ns_plogi(struct lpfc_hba *phba, struct lpfc_vport *vport)
10376 {
10377         struct lpfc_nodelist *ndlp;
10378         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
10379
10380         /*
10381          * If lpfc_delay_discovery parameter is set and the clean address
10382          * bit is cleared and fc fabric parameters chenged, delay FC NPort
10383          * discovery.
10384          */
10385         spin_lock_irq(shost->host_lock);
10386         if (vport->fc_flag & FC_DISC_DELAYED) {
10387                 spin_unlock_irq(shost->host_lock);
10388                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
10389                                  "3334 Delay fc port discovery for %d secs\n",
10390                                  phba->fc_ratov);
10391                 mod_timer(&vport->delayed_disc_tmo,
10392                         jiffies + msecs_to_jiffies(1000 * phba->fc_ratov));
10393                 return;
10394         }
10395         spin_unlock_irq(shost->host_lock);
10396
10397         ndlp = lpfc_findnode_did(vport, NameServer_DID);
10398         if (!ndlp) {
10399                 ndlp = lpfc_nlp_init(vport, NameServer_DID);
10400                 if (!ndlp) {
10401                         if (phba->fc_topology == LPFC_TOPOLOGY_LOOP) {
10402                                 lpfc_disc_start(vport);
10403                                 return;
10404                         }
10405                         lpfc_vport_set_state(vport, FC_VPORT_FAILED);
10406                         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
10407                                          "0251 NameServer login: no memory\n");
10408                         return;
10409                 }
10410         }
10411
10412         ndlp->nlp_type |= NLP_FABRIC;
10413
10414         lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
10415
10416         if (lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0)) {
10417                 lpfc_vport_set_state(vport, FC_VPORT_FAILED);
10418                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
10419                                  "0252 Cannot issue NameServer login\n");
10420                 return;
10421         }
10422
10423         if ((phba->cfg_enable_SmartSAN ||
10424              (phba->cfg_fdmi_on == LPFC_FDMI_SUPPORT)) &&
10425              (vport->load_flag & FC_ALLOW_FDMI))
10426                 lpfc_start_fdmi(vport);
10427 }
10428
10429 /**
10430  * lpfc_cmpl_reg_new_vport - Completion callback function to register new vport
10431  * @phba: pointer to lpfc hba data structure.
10432  * @pmb: pointer to the driver internal queue element for mailbox command.
10433  *
10434  * This routine is the completion callback function to register new vport
10435  * mailbox command. If the new vport mailbox command completes successfully,
10436  * the fabric registration login shall be performed on physical port (the
10437  * new vport created is actually a physical port, with VPI 0) or the port
10438  * login to Name Server for State Change Request (SCR) will be performed
10439  * on virtual port (real virtual port, with VPI greater than 0).
10440  **/
10441 static void
10442 lpfc_cmpl_reg_new_vport(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
10443 {
10444         struct lpfc_vport *vport = pmb->vport;
10445         struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
10446         struct lpfc_nodelist *ndlp = (struct lpfc_nodelist *)pmb->ctx_ndlp;
10447         MAILBOX_t *mb = &pmb->u.mb;
10448         int rc;
10449
10450         spin_lock_irq(shost->host_lock);
10451         vport->fc_flag &= ~FC_VPORT_NEEDS_REG_VPI;
10452         spin_unlock_irq(shost->host_lock);
10453
10454         if (mb->mbxStatus) {
10455                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
10456                                 "0915 Register VPI failed : Status: x%x"
10457                                 " upd bit: x%x \n", mb->mbxStatus,
10458                                  mb->un.varRegVpi.upd);
10459                 if (phba->sli_rev == LPFC_SLI_REV4 &&
10460                         mb->un.varRegVpi.upd)
10461                         goto mbox_err_exit ;
10462
10463                 switch (mb->mbxStatus) {
10464                 case 0x11:      /* unsupported feature */
10465                 case 0x9603:    /* max_vpi exceeded */
10466                 case 0x9602:    /* Link event since CLEAR_LA */
10467                         /* giving up on vport registration */
10468                         lpfc_vport_set_state(vport, FC_VPORT_FAILED);
10469                         spin_lock_irq(shost->host_lock);
10470                         vport->fc_flag &= ~(FC_FABRIC | FC_PUBLIC_LOOP);
10471                         spin_unlock_irq(shost->host_lock);
10472                         lpfc_can_disctmo(vport);
10473                         break;
10474                 /* If reg_vpi fail with invalid VPI status, re-init VPI */
10475                 case 0x20:
10476                         spin_lock_irq(shost->host_lock);
10477                         vport->fc_flag |= FC_VPORT_NEEDS_REG_VPI;
10478                         spin_unlock_irq(shost->host_lock);
10479                         lpfc_init_vpi(phba, pmb, vport->vpi);
10480                         pmb->vport = vport;
10481                         pmb->mbox_cmpl = lpfc_init_vpi_cmpl;
10482                         rc = lpfc_sli_issue_mbox(phba, pmb,
10483                                 MBX_NOWAIT);
10484                         if (rc == MBX_NOT_FINISHED) {
10485                                 lpfc_printf_vlog(vport, KERN_ERR,
10486                                                  LOG_TRACE_EVENT,
10487                                         "2732 Failed to issue INIT_VPI"
10488                                         " mailbox command\n");
10489                         } else {
10490                                 lpfc_nlp_put(ndlp);
10491                                 return;
10492                         }
10493                         fallthrough;
10494                 default:
10495                         /* Try to recover from this error */
10496                         if (phba->sli_rev == LPFC_SLI_REV4)
10497                                 lpfc_sli4_unreg_all_rpis(vport);
10498                         lpfc_mbx_unreg_vpi(vport);
10499                         spin_lock_irq(shost->host_lock);
10500                         vport->fc_flag |= FC_VPORT_NEEDS_REG_VPI;
10501                         spin_unlock_irq(shost->host_lock);
10502                         if (mb->mbxStatus == MBX_NOT_FINISHED)
10503                                 break;
10504                         if ((vport->port_type == LPFC_PHYSICAL_PORT) &&
10505                             !(vport->fc_flag & FC_LOGO_RCVD_DID_CHNG)) {
10506                                 if (phba->sli_rev == LPFC_SLI_REV4)
10507                                         lpfc_issue_init_vfi(vport);
10508                                 else
10509                                         lpfc_initial_flogi(vport);
10510                         } else {
10511                                 lpfc_initial_fdisc(vport);
10512                         }
10513                         break;
10514                 }
10515         } else {
10516                 spin_lock_irq(shost->host_lock);
10517                 vport->vpi_state |= LPFC_VPI_REGISTERED;
10518                 spin_unlock_irq(shost->host_lock);
10519                 if (vport == phba->pport) {
10520                         if (phba->sli_rev < LPFC_SLI_REV4)
10521                                 lpfc_issue_fabric_reglogin(vport);
10522                         else {
10523                                 /*
10524                                  * If the physical port is instantiated using
10525                                  * FDISC, do not start vport discovery.
10526                                  */
10527                                 if (vport->port_state != LPFC_FDISC)
10528                                         lpfc_start_fdiscs(phba);
10529                                 lpfc_do_scr_ns_plogi(phba, vport);
10530                         }
10531                 } else {
10532                         lpfc_do_scr_ns_plogi(phba, vport);
10533                 }
10534         }
10535 mbox_err_exit:
10536         /* Now, we decrement the ndlp reference count held for this
10537          * callback function
10538          */
10539         lpfc_nlp_put(ndlp);
10540
10541         mempool_free(pmb, phba->mbox_mem_pool);
10542         return;
10543 }
10544
10545 /**
10546  * lpfc_register_new_vport - Register a new vport with a HBA
10547  * @phba: pointer to lpfc hba data structure.
10548  * @vport: pointer to a host virtual N_Port data structure.
10549  * @ndlp: pointer to a node-list data structure.
10550  *
10551  * This routine registers the @vport as a new virtual port with a HBA.
10552  * It is done through a registering vpi mailbox command.
10553  **/
10554 void
10555 lpfc_register_new_vport(struct lpfc_hba *phba, struct lpfc_vport *vport,
10556                         struct lpfc_nodelist *ndlp)
10557 {
10558         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
10559         LPFC_MBOXQ_t *mbox;
10560
10561         mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
10562         if (mbox) {
10563                 lpfc_reg_vpi(vport, mbox);
10564                 mbox->vport = vport;
10565                 mbox->ctx_ndlp = lpfc_nlp_get(ndlp);
10566                 if (!mbox->ctx_ndlp) {
10567                         mempool_free(mbox, phba->mbox_mem_pool);
10568                         goto mbox_err_exit;
10569                 }
10570
10571                 mbox->mbox_cmpl = lpfc_cmpl_reg_new_vport;
10572                 if (lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT)
10573                     == MBX_NOT_FINISHED) {
10574                         /* mailbox command not success, decrement ndlp
10575                          * reference count for this command
10576                          */
10577                         lpfc_nlp_put(ndlp);
10578                         mempool_free(mbox, phba->mbox_mem_pool);
10579
10580                         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
10581                                 "0253 Register VPI: Can't send mbox\n");
10582                         goto mbox_err_exit;
10583                 }
10584         } else {
10585                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
10586                                  "0254 Register VPI: no memory\n");
10587                 goto mbox_err_exit;
10588         }
10589         return;
10590
10591 mbox_err_exit:
10592         lpfc_vport_set_state(vport, FC_VPORT_FAILED);
10593         spin_lock_irq(shost->host_lock);
10594         vport->fc_flag &= ~FC_VPORT_NEEDS_REG_VPI;
10595         spin_unlock_irq(shost->host_lock);
10596         return;
10597 }
10598
10599 /**
10600  * lpfc_cancel_all_vport_retry_delay_timer - Cancel all vport retry delay timer
10601  * @phba: pointer to lpfc hba data structure.
10602  *
10603  * This routine cancels the retry delay timers to all the vports.
10604  **/
10605 void
10606 lpfc_cancel_all_vport_retry_delay_timer(struct lpfc_hba *phba)
10607 {
10608         struct lpfc_vport **vports;
10609         struct lpfc_nodelist *ndlp;
10610         uint32_t link_state;
10611         int i;
10612
10613         /* Treat this failure as linkdown for all vports */
10614         link_state = phba->link_state;
10615         lpfc_linkdown(phba);
10616         phba->link_state = link_state;
10617
10618         vports = lpfc_create_vport_work_array(phba);
10619
10620         if (vports) {
10621                 for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
10622                         ndlp = lpfc_findnode_did(vports[i], Fabric_DID);
10623                         if (ndlp)
10624                                 lpfc_cancel_retry_delay_tmo(vports[i], ndlp);
10625                         lpfc_els_flush_cmd(vports[i]);
10626                 }
10627                 lpfc_destroy_vport_work_array(phba, vports);
10628         }
10629 }
10630
10631 /**
10632  * lpfc_retry_pport_discovery - Start timer to retry FLOGI.
10633  * @phba: pointer to lpfc hba data structure.
10634  *
10635  * This routine abort all pending discovery commands and
10636  * start a timer to retry FLOGI for the physical port
10637  * discovery.
10638  **/
10639 void
10640 lpfc_retry_pport_discovery(struct lpfc_hba *phba)
10641 {
10642         struct lpfc_nodelist *ndlp;
10643
10644         /* Cancel the all vports retry delay retry timers */
10645         lpfc_cancel_all_vport_retry_delay_timer(phba);
10646
10647         /* If fabric require FLOGI, then re-instantiate physical login */
10648         ndlp = lpfc_findnode_did(phba->pport, Fabric_DID);
10649         if (!ndlp)
10650                 return;
10651
10652         mod_timer(&ndlp->nlp_delayfunc, jiffies + msecs_to_jiffies(1000));
10653         spin_lock_irq(&ndlp->lock);
10654         ndlp->nlp_flag |= NLP_DELAY_TMO;
10655         spin_unlock_irq(&ndlp->lock);
10656         ndlp->nlp_last_elscmd = ELS_CMD_FLOGI;
10657         phba->pport->port_state = LPFC_FLOGI;
10658         return;
10659 }
10660
10661 /**
10662  * lpfc_fabric_login_reqd - Check if FLOGI required.
10663  * @phba: pointer to lpfc hba data structure.
10664  * @cmdiocb: pointer to FDISC command iocb.
10665  * @rspiocb: pointer to FDISC response iocb.
10666  *
10667  * This routine checks if a FLOGI is reguired for FDISC
10668  * to succeed.
10669  **/
10670 static int
10671 lpfc_fabric_login_reqd(struct lpfc_hba *phba,
10672                 struct lpfc_iocbq *cmdiocb,
10673                 struct lpfc_iocbq *rspiocb)
10674 {
10675
10676         if ((rspiocb->iocb.ulpStatus != IOSTAT_FABRIC_RJT) ||
10677                 (rspiocb->iocb.un.ulpWord[4] != RJT_LOGIN_REQUIRED))
10678                 return 0;
10679         else
10680                 return 1;
10681 }
10682
10683 /**
10684  * lpfc_cmpl_els_fdisc - Completion function for fdisc iocb command
10685  * @phba: pointer to lpfc hba data structure.
10686  * @cmdiocb: pointer to lpfc command iocb data structure.
10687  * @rspiocb: pointer to lpfc response iocb data structure.
10688  *
10689  * This routine is the completion callback function to a Fabric Discover
10690  * (FDISC) ELS command. Since all the FDISC ELS commands are issued
10691  * single threaded, each FDISC completion callback function will reset
10692  * the discovery timer for all vports such that the timers will not get
10693  * unnecessary timeout. The function checks the FDISC IOCB status. If error
10694  * detected, the vport will be set to FC_VPORT_FAILED state. Otherwise,the
10695  * vport will set to FC_VPORT_ACTIVE state. It then checks whether the DID
10696  * assigned to the vport has been changed with the completion of the FDISC
10697  * command. If so, both RPI (Remote Port Index) and VPI (Virtual Port Index)
10698  * are unregistered from the HBA, and then the lpfc_register_new_vport()
10699  * routine is invoked to register new vport with the HBA. Otherwise, the
10700  * lpfc_do_scr_ns_plogi() routine is invoked to issue a PLOGI to the Name
10701  * Server for State Change Request (SCR).
10702  **/
10703 static void
10704 lpfc_cmpl_els_fdisc(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
10705                     struct lpfc_iocbq *rspiocb)
10706 {
10707         struct lpfc_vport *vport = cmdiocb->vport;
10708         struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
10709         struct lpfc_nodelist *ndlp = (struct lpfc_nodelist *) cmdiocb->context1;
10710         struct lpfc_nodelist *np;
10711         struct lpfc_nodelist *next_np;
10712         IOCB_t *irsp = &rspiocb->iocb;
10713         struct lpfc_iocbq *piocb;
10714         struct lpfc_dmabuf *pcmd = cmdiocb->context2, *prsp;
10715         struct serv_parm *sp;
10716         uint8_t fabric_param_changed;
10717
10718         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
10719                          "0123 FDISC completes. x%x/x%x prevDID: x%x\n",
10720                          irsp->ulpStatus, irsp->un.ulpWord[4],
10721                          vport->fc_prevDID);
10722         /* Since all FDISCs are being single threaded, we
10723          * must reset the discovery timer for ALL vports
10724          * waiting to send FDISC when one completes.
10725          */
10726         list_for_each_entry(piocb, &phba->fabric_iocb_list, list) {
10727                 lpfc_set_disctmo(piocb->vport);
10728         }
10729
10730         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
10731                 "FDISC cmpl:      status:x%x/x%x prevdid:x%x",
10732                 irsp->ulpStatus, irsp->un.ulpWord[4], vport->fc_prevDID);
10733
10734         if (irsp->ulpStatus) {
10735
10736                 if (lpfc_fabric_login_reqd(phba, cmdiocb, rspiocb)) {
10737                         lpfc_retry_pport_discovery(phba);
10738                         goto out;
10739                 }
10740
10741                 /* Check for retry */
10742                 if (lpfc_els_retry(phba, cmdiocb, rspiocb))
10743                         goto out;
10744                 /* FDISC failed */
10745                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
10746                                  "0126 FDISC failed. (x%x/x%x)\n",
10747                                  irsp->ulpStatus, irsp->un.ulpWord[4]);
10748                 goto fdisc_failed;
10749         }
10750
10751         lpfc_check_nlp_post_devloss(vport, ndlp);
10752
10753         spin_lock_irq(shost->host_lock);
10754         vport->fc_flag &= ~FC_VPORT_CVL_RCVD;
10755         vport->fc_flag &= ~FC_VPORT_LOGO_RCVD;
10756         vport->fc_flag |= FC_FABRIC;
10757         if (vport->phba->fc_topology == LPFC_TOPOLOGY_LOOP)
10758                 vport->fc_flag |=  FC_PUBLIC_LOOP;
10759         spin_unlock_irq(shost->host_lock);
10760
10761         vport->fc_myDID = irsp->un.ulpWord[4] & Mask_DID;
10762         lpfc_vport_set_state(vport, FC_VPORT_ACTIVE);
10763         prsp = list_get_first(&pcmd->list, struct lpfc_dmabuf, list);
10764         if (!prsp)
10765                 goto out;
10766         sp = prsp->virt + sizeof(uint32_t);
10767         fabric_param_changed = lpfc_check_clean_addr_bit(vport, sp);
10768         memcpy(&vport->fabric_portname, &sp->portName,
10769                 sizeof(struct lpfc_name));
10770         memcpy(&vport->fabric_nodename, &sp->nodeName,
10771                 sizeof(struct lpfc_name));
10772         if (fabric_param_changed &&
10773                 !(vport->fc_flag & FC_VPORT_NEEDS_REG_VPI)) {
10774                 /* If our NportID changed, we need to ensure all
10775                  * remaining NPORTs get unreg_login'ed so we can
10776                  * issue unreg_vpi.
10777                  */
10778                 list_for_each_entry_safe(np, next_np,
10779                         &vport->fc_nodes, nlp_listp) {
10780                         if ((np->nlp_state != NLP_STE_NPR_NODE) ||
10781                             !(np->nlp_flag & NLP_NPR_ADISC))
10782                                 continue;
10783                         spin_lock_irq(&ndlp->lock);
10784                         np->nlp_flag &= ~NLP_NPR_ADISC;
10785                         spin_unlock_irq(&ndlp->lock);
10786                         lpfc_unreg_rpi(vport, np);
10787                 }
10788                 lpfc_cleanup_pending_mbox(vport);
10789
10790                 if (phba->sli_rev == LPFC_SLI_REV4)
10791                         lpfc_sli4_unreg_all_rpis(vport);
10792
10793                 lpfc_mbx_unreg_vpi(vport);
10794                 spin_lock_irq(shost->host_lock);
10795                 vport->fc_flag |= FC_VPORT_NEEDS_REG_VPI;
10796                 if (phba->sli_rev == LPFC_SLI_REV4)
10797                         vport->fc_flag |= FC_VPORT_NEEDS_INIT_VPI;
10798                 else
10799                         vport->fc_flag |= FC_LOGO_RCVD_DID_CHNG;
10800                 spin_unlock_irq(shost->host_lock);
10801         } else if ((phba->sli_rev == LPFC_SLI_REV4) &&
10802                 !(vport->fc_flag & FC_VPORT_NEEDS_REG_VPI)) {
10803                 /*
10804                  * Driver needs to re-reg VPI in order for f/w
10805                  * to update the MAC address.
10806                  */
10807                 lpfc_register_new_vport(phba, vport, ndlp);
10808                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
10809                 goto out;
10810         }
10811
10812         if (vport->fc_flag & FC_VPORT_NEEDS_INIT_VPI)
10813                 lpfc_issue_init_vpi(vport);
10814         else if (vport->fc_flag & FC_VPORT_NEEDS_REG_VPI)
10815                 lpfc_register_new_vport(phba, vport, ndlp);
10816         else
10817                 lpfc_do_scr_ns_plogi(phba, vport);
10818
10819         /* The FDISC completed successfully. Move the fabric ndlp to
10820          * UNMAPPED state and register with the transport.
10821          */
10822         lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
10823         goto out;
10824
10825 fdisc_failed:
10826         if (vport->fc_vport &&
10827             (vport->fc_vport->vport_state != FC_VPORT_NO_FABRIC_RSCS))
10828                 lpfc_vport_set_state(vport, FC_VPORT_FAILED);
10829         /* Cancel discovery timer */
10830         lpfc_can_disctmo(vport);
10831 out:
10832         lpfc_els_free_iocb(phba, cmdiocb);
10833         lpfc_nlp_put(ndlp);
10834 }
10835
10836 /**
10837  * lpfc_issue_els_fdisc - Issue a fdisc iocb command
10838  * @vport: pointer to a virtual N_Port data structure.
10839  * @ndlp: pointer to a node-list data structure.
10840  * @retry: number of retries to the command IOCB.
10841  *
10842  * This routine prepares and issues a Fabric Discover (FDISC) IOCB to
10843  * a remote node (@ndlp) off a @vport. It uses the lpfc_issue_fabric_iocb()
10844  * routine to issue the IOCB, which makes sure only one outstanding fabric
10845  * IOCB will be sent off HBA at any given time.
10846  *
10847  * Note that the ndlp reference count will be incremented by 1 for holding the
10848  * ndlp and the reference to ndlp will be stored into the context1 field of
10849  * the IOCB for the completion callback function to the FDISC ELS command.
10850  *
10851  * Return code
10852  *   0 - Successfully issued fdisc iocb command
10853  *   1 - Failed to issue fdisc iocb command
10854  **/
10855 static int
10856 lpfc_issue_els_fdisc(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
10857                      uint8_t retry)
10858 {
10859         struct lpfc_hba *phba = vport->phba;
10860         IOCB_t *icmd;
10861         struct lpfc_iocbq *elsiocb;
10862         struct serv_parm *sp;
10863         uint8_t *pcmd;
10864         uint16_t cmdsize;
10865         int did = ndlp->nlp_DID;
10866         int rc;
10867
10868         vport->port_state = LPFC_FDISC;
10869         vport->fc_myDID = 0;
10870         cmdsize = (sizeof(uint32_t) + sizeof(struct serv_parm));
10871         elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, retry, ndlp, did,
10872                                      ELS_CMD_FDISC);
10873         if (!elsiocb) {
10874                 lpfc_vport_set_state(vport, FC_VPORT_FAILED);
10875                 lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
10876                                  "0255 Issue FDISC: no IOCB\n");
10877                 return 1;
10878         }
10879
10880         icmd = &elsiocb->iocb;
10881         icmd->un.elsreq64.myID = 0;
10882         icmd->un.elsreq64.fl = 1;
10883
10884         /*
10885          * SLI3 ports require a different context type value than SLI4.
10886          * Catch SLI3 ports here and override the prep.
10887          */
10888         if (phba->sli_rev == LPFC_SLI_REV3) {
10889                 icmd->ulpCt_h = 1;
10890                 icmd->ulpCt_l = 0;
10891         }
10892
10893         pcmd = (uint8_t *) (((struct lpfc_dmabuf *) elsiocb->context2)->virt);
10894         *((uint32_t *) (pcmd)) = ELS_CMD_FDISC;
10895         pcmd += sizeof(uint32_t); /* CSP Word 1 */
10896         memcpy(pcmd, &vport->phba->pport->fc_sparam, sizeof(struct serv_parm));
10897         sp = (struct serv_parm *) pcmd;
10898         /* Setup CSPs accordingly for Fabric */
10899         sp->cmn.e_d_tov = 0;
10900         sp->cmn.w2.r_a_tov = 0;
10901         sp->cmn.virtual_fabric_support = 0;
10902         sp->cls1.classValid = 0;
10903         sp->cls2.seqDelivery = 1;
10904         sp->cls3.seqDelivery = 1;
10905
10906         pcmd += sizeof(uint32_t); /* CSP Word 2 */
10907         pcmd += sizeof(uint32_t); /* CSP Word 3 */
10908         pcmd += sizeof(uint32_t); /* CSP Word 4 */
10909         pcmd += sizeof(uint32_t); /* Port Name */
10910         memcpy(pcmd, &vport->fc_portname, 8);
10911         pcmd += sizeof(uint32_t); /* Node Name */
10912         pcmd += sizeof(uint32_t); /* Node Name */
10913         memcpy(pcmd, &vport->fc_nodename, 8);
10914         sp->cmn.valid_vendor_ver_level = 0;
10915         memset(sp->un.vendorVersion, 0, sizeof(sp->un.vendorVersion));
10916         lpfc_set_disctmo(vport);
10917
10918         phba->fc_stat.elsXmitFDISC++;
10919         elsiocb->iocb_cmpl = lpfc_cmpl_els_fdisc;
10920
10921         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
10922                 "Issue FDISC:     did:x%x",
10923                 did, 0, 0);
10924
10925         elsiocb->context1 = lpfc_nlp_get(ndlp);
10926         if (!elsiocb->context1) {
10927                 lpfc_els_free_iocb(phba, elsiocb);
10928                 goto err_out;
10929         }
10930
10931         rc = lpfc_issue_fabric_iocb(phba, elsiocb);
10932         if (rc == IOCB_ERROR) {
10933                 lpfc_els_free_iocb(phba, elsiocb);
10934                 lpfc_nlp_put(ndlp);
10935                 goto err_out;
10936         }
10937
10938         lpfc_vport_set_state(vport, FC_VPORT_INITIALIZING);
10939         return 0;
10940
10941  err_out:
10942         lpfc_vport_set_state(vport, FC_VPORT_FAILED);
10943         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
10944                          "0256 Issue FDISC: Cannot send IOCB\n");
10945         return 1;
10946 }
10947
10948 /**
10949  * lpfc_cmpl_els_npiv_logo - Completion function with vport logo
10950  * @phba: pointer to lpfc hba data structure.
10951  * @cmdiocb: pointer to lpfc command iocb data structure.
10952  * @rspiocb: pointer to lpfc response iocb data structure.
10953  *
10954  * This routine is the completion callback function to the issuing of a LOGO
10955  * ELS command off a vport. It frees the command IOCB and then decrement the
10956  * reference count held on ndlp for this completion function, indicating that
10957  * the reference to the ndlp is no long needed. Note that the
10958  * lpfc_els_free_iocb() routine decrements the ndlp reference held for this
10959  * callback function and an additional explicit ndlp reference decrementation
10960  * will trigger the actual release of the ndlp.
10961  **/
10962 static void
10963 lpfc_cmpl_els_npiv_logo(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
10964                         struct lpfc_iocbq *rspiocb)
10965 {
10966         struct lpfc_vport *vport = cmdiocb->vport;
10967         IOCB_t *irsp;
10968         struct lpfc_nodelist *ndlp;
10969         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
10970
10971         ndlp = (struct lpfc_nodelist *)cmdiocb->context1;
10972         irsp = &rspiocb->iocb;
10973         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
10974                 "LOGO npiv cmpl:  status:x%x/x%x did:x%x",
10975                 irsp->ulpStatus, irsp->un.ulpWord[4], irsp->un.rcvels.remoteID);
10976
10977         /* NPIV LOGO completes to NPort <nlp_DID> */
10978         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
10979                          "2928 NPIV LOGO completes to NPort x%x "
10980                          "Data: x%x x%x x%x x%x x%x x%x x%x\n",
10981                          ndlp->nlp_DID, irsp->ulpStatus, irsp->un.ulpWord[4],
10982                          irsp->ulpTimeout, vport->num_disc_nodes,
10983                          kref_read(&ndlp->kref), ndlp->nlp_flag,
10984                          ndlp->fc4_xpt_flags);
10985
10986         if (irsp->ulpStatus == IOSTAT_SUCCESS) {
10987                 spin_lock_irq(shost->host_lock);
10988                 vport->fc_flag &= ~FC_NDISC_ACTIVE;
10989                 vport->fc_flag &= ~FC_FABRIC;
10990                 spin_unlock_irq(shost->host_lock);
10991                 lpfc_can_disctmo(vport);
10992         }
10993
10994         if (ndlp->save_flags & NLP_WAIT_FOR_LOGO) {
10995                 /* Wake up lpfc_vport_delete if waiting...*/
10996                 if (ndlp->logo_waitq)
10997                         wake_up(ndlp->logo_waitq);
10998                 spin_lock_irq(&ndlp->lock);
10999                 ndlp->nlp_flag &= ~(NLP_ISSUE_LOGO | NLP_LOGO_SND);
11000                 ndlp->save_flags &= ~NLP_WAIT_FOR_LOGO;
11001                 spin_unlock_irq(&ndlp->lock);
11002         }
11003
11004         /* Safe to release resources now. */
11005         lpfc_els_free_iocb(phba, cmdiocb);
11006         lpfc_nlp_put(ndlp);
11007 }
11008
11009 /**
11010  * lpfc_issue_els_npiv_logo - Issue a logo off a vport
11011  * @vport: pointer to a virtual N_Port data structure.
11012  * @ndlp: pointer to a node-list data structure.
11013  *
11014  * This routine issues a LOGO ELS command to an @ndlp off a @vport.
11015  *
11016  * Note that the ndlp reference count will be incremented by 1 for holding the
11017  * ndlp and the reference to ndlp will be stored into the context1 field of
11018  * the IOCB for the completion callback function to the LOGO ELS command.
11019  *
11020  * Return codes
11021  *   0 - Successfully issued logo off the @vport
11022  *   1 - Failed to issue logo off the @vport
11023  **/
11024 int
11025 lpfc_issue_els_npiv_logo(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
11026 {
11027         int rc = 0;
11028         struct lpfc_hba  *phba = vport->phba;
11029         struct lpfc_iocbq *elsiocb;
11030         uint8_t *pcmd;
11031         uint16_t cmdsize;
11032
11033         cmdsize = 2 * sizeof(uint32_t) + sizeof(struct lpfc_name);
11034         elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, 0, ndlp, ndlp->nlp_DID,
11035                                      ELS_CMD_LOGO);
11036         if (!elsiocb)
11037                 return 1;
11038
11039         pcmd = (uint8_t *) (((struct lpfc_dmabuf *) elsiocb->context2)->virt);
11040         *((uint32_t *) (pcmd)) = ELS_CMD_LOGO;
11041         pcmd += sizeof(uint32_t);
11042
11043         /* Fill in LOGO payload */
11044         *((uint32_t *) (pcmd)) = be32_to_cpu(vport->fc_myDID);
11045         pcmd += sizeof(uint32_t);
11046         memcpy(pcmd, &vport->fc_portname, sizeof(struct lpfc_name));
11047
11048         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
11049                 "Issue LOGO npiv  did:x%x flg:x%x",
11050                 ndlp->nlp_DID, ndlp->nlp_flag, 0);
11051
11052         elsiocb->iocb_cmpl = lpfc_cmpl_els_npiv_logo;
11053         spin_lock_irq(&ndlp->lock);
11054         ndlp->nlp_flag |= NLP_LOGO_SND;
11055         spin_unlock_irq(&ndlp->lock);
11056         elsiocb->context1 = lpfc_nlp_get(ndlp);
11057         if (!elsiocb->context1) {
11058                 lpfc_els_free_iocb(phba, elsiocb);
11059                 goto err;
11060         }
11061
11062         rc = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 0);
11063         if (rc == IOCB_ERROR) {
11064                 lpfc_els_free_iocb(phba, elsiocb);
11065                 lpfc_nlp_put(ndlp);
11066                 goto err;
11067         }
11068         return 0;
11069
11070 err:
11071         spin_lock_irq(&ndlp->lock);
11072         ndlp->nlp_flag &= ~NLP_LOGO_SND;
11073         spin_unlock_irq(&ndlp->lock);
11074         return 1;
11075 }
11076
11077 /**
11078  * lpfc_fabric_block_timeout - Handler function to the fabric block timer
11079  * @t: timer context used to obtain the lpfc hba.
11080  *
11081  * This routine is invoked by the fabric iocb block timer after
11082  * timeout. It posts the fabric iocb block timeout event by setting the
11083  * WORKER_FABRIC_BLOCK_TMO bit to work port event bitmap and then invokes
11084  * lpfc_worker_wake_up() routine to wake up the worker thread. It is for
11085  * the worker thread to invoke the lpfc_unblock_fabric_iocbs() on the
11086  * posted event WORKER_FABRIC_BLOCK_TMO.
11087  **/
11088 void
11089 lpfc_fabric_block_timeout(struct timer_list *t)
11090 {
11091         struct lpfc_hba  *phba = from_timer(phba, t, fabric_block_timer);
11092         unsigned long iflags;
11093         uint32_t tmo_posted;
11094
11095         spin_lock_irqsave(&phba->pport->work_port_lock, iflags);
11096         tmo_posted = phba->pport->work_port_events & WORKER_FABRIC_BLOCK_TMO;
11097         if (!tmo_posted)
11098                 phba->pport->work_port_events |= WORKER_FABRIC_BLOCK_TMO;
11099         spin_unlock_irqrestore(&phba->pport->work_port_lock, iflags);
11100
11101         if (!tmo_posted)
11102                 lpfc_worker_wake_up(phba);
11103         return;
11104 }
11105
11106 /**
11107  * lpfc_resume_fabric_iocbs - Issue a fabric iocb from driver internal list
11108  * @phba: pointer to lpfc hba data structure.
11109  *
11110  * This routine issues one fabric iocb from the driver internal list to
11111  * the HBA. It first checks whether it's ready to issue one fabric iocb to
11112  * the HBA (whether there is no outstanding fabric iocb). If so, it shall
11113  * remove one pending fabric iocb from the driver internal list and invokes
11114  * lpfc_sli_issue_iocb() routine to send the fabric iocb to the HBA.
11115  **/
11116 static void
11117 lpfc_resume_fabric_iocbs(struct lpfc_hba *phba)
11118 {
11119         struct lpfc_iocbq *iocb;
11120         unsigned long iflags;
11121         int ret;
11122         IOCB_t *cmd;
11123
11124 repeat:
11125         iocb = NULL;
11126         spin_lock_irqsave(&phba->hbalock, iflags);
11127         /* Post any pending iocb to the SLI layer */
11128         if (atomic_read(&phba->fabric_iocb_count) == 0) {
11129                 list_remove_head(&phba->fabric_iocb_list, iocb, typeof(*iocb),
11130                                  list);
11131                 if (iocb)
11132                         /* Increment fabric iocb count to hold the position */
11133                         atomic_inc(&phba->fabric_iocb_count);
11134         }
11135         spin_unlock_irqrestore(&phba->hbalock, iflags);
11136         if (iocb) {
11137                 iocb->fabric_iocb_cmpl = iocb->iocb_cmpl;
11138                 iocb->iocb_cmpl = lpfc_cmpl_fabric_iocb;
11139                 iocb->iocb_flag |= LPFC_IO_FABRIC;
11140
11141                 lpfc_debugfs_disc_trc(iocb->vport, LPFC_DISC_TRC_ELS_CMD,
11142                         "Fabric sched1:   ste:x%x",
11143                         iocb->vport->port_state, 0, 0);
11144
11145                 ret = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, iocb, 0);
11146
11147                 if (ret == IOCB_ERROR) {
11148                         iocb->iocb_cmpl = iocb->fabric_iocb_cmpl;
11149                         iocb->fabric_iocb_cmpl = NULL;
11150                         iocb->iocb_flag &= ~LPFC_IO_FABRIC;
11151                         cmd = &iocb->iocb;
11152                         cmd->ulpStatus = IOSTAT_LOCAL_REJECT;
11153                         cmd->un.ulpWord[4] = IOERR_SLI_ABORTED;
11154                         iocb->iocb_cmpl(phba, iocb, iocb);
11155
11156                         atomic_dec(&phba->fabric_iocb_count);
11157                         goto repeat;
11158                 }
11159         }
11160 }
11161
11162 /**
11163  * lpfc_unblock_fabric_iocbs - Unblock issuing fabric iocb command
11164  * @phba: pointer to lpfc hba data structure.
11165  *
11166  * This routine unblocks the  issuing fabric iocb command. The function
11167  * will clear the fabric iocb block bit and then invoke the routine
11168  * lpfc_resume_fabric_iocbs() to issue one of the pending fabric iocb
11169  * from the driver internal fabric iocb list.
11170  **/
11171 void
11172 lpfc_unblock_fabric_iocbs(struct lpfc_hba *phba)
11173 {
11174         clear_bit(FABRIC_COMANDS_BLOCKED, &phba->bit_flags);
11175
11176         lpfc_resume_fabric_iocbs(phba);
11177         return;
11178 }
11179
11180 /**
11181  * lpfc_block_fabric_iocbs - Block issuing fabric iocb command
11182  * @phba: pointer to lpfc hba data structure.
11183  *
11184  * This routine blocks the issuing fabric iocb for a specified amount of
11185  * time (currently 100 ms). This is done by set the fabric iocb block bit
11186  * and set up a timeout timer for 100ms. When the block bit is set, no more
11187  * fabric iocb will be issued out of the HBA.
11188  **/
11189 static void
11190 lpfc_block_fabric_iocbs(struct lpfc_hba *phba)
11191 {
11192         int blocked;
11193
11194         blocked = test_and_set_bit(FABRIC_COMANDS_BLOCKED, &phba->bit_flags);
11195         /* Start a timer to unblock fabric iocbs after 100ms */
11196         if (!blocked)
11197                 mod_timer(&phba->fabric_block_timer,
11198                           jiffies + msecs_to_jiffies(100));
11199
11200         return;
11201 }
11202
11203 /**
11204  * lpfc_cmpl_fabric_iocb - Completion callback function for fabric iocb
11205  * @phba: pointer to lpfc hba data structure.
11206  * @cmdiocb: pointer to lpfc command iocb data structure.
11207  * @rspiocb: pointer to lpfc response iocb data structure.
11208  *
11209  * This routine is the callback function that is put to the fabric iocb's
11210  * callback function pointer (iocb->iocb_cmpl). The original iocb's callback
11211  * function pointer has been stored in iocb->fabric_iocb_cmpl. This callback
11212  * function first restores and invokes the original iocb's callback function
11213  * and then invokes the lpfc_resume_fabric_iocbs() routine to issue the next
11214  * fabric bound iocb from the driver internal fabric iocb list onto the wire.
11215  **/
11216 static void
11217 lpfc_cmpl_fabric_iocb(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
11218         struct lpfc_iocbq *rspiocb)
11219 {
11220         struct ls_rjt stat;
11221
11222         BUG_ON((cmdiocb->iocb_flag & LPFC_IO_FABRIC) != LPFC_IO_FABRIC);
11223
11224         switch (rspiocb->iocb.ulpStatus) {
11225                 case IOSTAT_NPORT_RJT:
11226                 case IOSTAT_FABRIC_RJT:
11227                         if (rspiocb->iocb.un.ulpWord[4] & RJT_UNAVAIL_TEMP) {
11228                                 lpfc_block_fabric_iocbs(phba);
11229                         }
11230                         break;
11231
11232                 case IOSTAT_NPORT_BSY:
11233                 case IOSTAT_FABRIC_BSY:
11234                         lpfc_block_fabric_iocbs(phba);
11235                         break;
11236
11237                 case IOSTAT_LS_RJT:
11238                         stat.un.lsRjtError =
11239                                 be32_to_cpu(rspiocb->iocb.un.ulpWord[4]);
11240                         if ((stat.un.b.lsRjtRsnCode == LSRJT_UNABLE_TPC) ||
11241                                 (stat.un.b.lsRjtRsnCode == LSRJT_LOGICAL_BSY))
11242                                 lpfc_block_fabric_iocbs(phba);
11243                         break;
11244         }
11245
11246         BUG_ON(atomic_read(&phba->fabric_iocb_count) == 0);
11247
11248         cmdiocb->iocb_cmpl = cmdiocb->fabric_iocb_cmpl;
11249         cmdiocb->fabric_iocb_cmpl = NULL;
11250         cmdiocb->iocb_flag &= ~LPFC_IO_FABRIC;
11251         cmdiocb->iocb_cmpl(phba, cmdiocb, rspiocb);
11252
11253         atomic_dec(&phba->fabric_iocb_count);
11254         if (!test_bit(FABRIC_COMANDS_BLOCKED, &phba->bit_flags)) {
11255                 /* Post any pending iocbs to HBA */
11256                 lpfc_resume_fabric_iocbs(phba);
11257         }
11258 }
11259
11260 /**
11261  * lpfc_issue_fabric_iocb - Issue a fabric iocb command
11262  * @phba: pointer to lpfc hba data structure.
11263  * @iocb: pointer to lpfc command iocb data structure.
11264  *
11265  * This routine is used as the top-level API for issuing a fabric iocb command
11266  * such as FLOGI and FDISC. To accommodate certain switch fabric, this driver
11267  * function makes sure that only one fabric bound iocb will be outstanding at
11268  * any given time. As such, this function will first check to see whether there
11269  * is already an outstanding fabric iocb on the wire. If so, it will put the
11270  * newly issued iocb onto the driver internal fabric iocb list, waiting to be
11271  * issued later. Otherwise, it will issue the iocb on the wire and update the
11272  * fabric iocb count it indicate that there is one fabric iocb on the wire.
11273  *
11274  * Note, this implementation has a potential sending out fabric IOCBs out of
11275  * order. The problem is caused by the construction of the "ready" boolen does
11276  * not include the condition that the internal fabric IOCB list is empty. As
11277  * such, it is possible a fabric IOCB issued by this routine might be "jump"
11278  * ahead of the fabric IOCBs in the internal list.
11279  *
11280  * Return code
11281  *   IOCB_SUCCESS - either fabric iocb put on the list or issued successfully
11282  *   IOCB_ERROR - failed to issue fabric iocb
11283  **/
11284 static int
11285 lpfc_issue_fabric_iocb(struct lpfc_hba *phba, struct lpfc_iocbq *iocb)
11286 {
11287         unsigned long iflags;
11288         int ready;
11289         int ret;
11290
11291         BUG_ON(atomic_read(&phba->fabric_iocb_count) > 1);
11292
11293         spin_lock_irqsave(&phba->hbalock, iflags);
11294         ready = atomic_read(&phba->fabric_iocb_count) == 0 &&
11295                 !test_bit(FABRIC_COMANDS_BLOCKED, &phba->bit_flags);
11296
11297         if (ready)
11298                 /* Increment fabric iocb count to hold the position */
11299                 atomic_inc(&phba->fabric_iocb_count);
11300         spin_unlock_irqrestore(&phba->hbalock, iflags);
11301         if (ready) {
11302                 iocb->fabric_iocb_cmpl = iocb->iocb_cmpl;
11303                 iocb->iocb_cmpl = lpfc_cmpl_fabric_iocb;
11304                 iocb->iocb_flag |= LPFC_IO_FABRIC;
11305
11306                 lpfc_debugfs_disc_trc(iocb->vport, LPFC_DISC_TRC_ELS_CMD,
11307                         "Fabric sched2:   ste:x%x",
11308                         iocb->vport->port_state, 0, 0);
11309
11310                 ret = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, iocb, 0);
11311
11312                 if (ret == IOCB_ERROR) {
11313                         iocb->iocb_cmpl = iocb->fabric_iocb_cmpl;
11314                         iocb->fabric_iocb_cmpl = NULL;
11315                         iocb->iocb_flag &= ~LPFC_IO_FABRIC;
11316                         atomic_dec(&phba->fabric_iocb_count);
11317                 }
11318         } else {
11319                 spin_lock_irqsave(&phba->hbalock, iflags);
11320                 list_add_tail(&iocb->list, &phba->fabric_iocb_list);
11321                 spin_unlock_irqrestore(&phba->hbalock, iflags);
11322                 ret = IOCB_SUCCESS;
11323         }
11324         return ret;
11325 }
11326
11327 /**
11328  * lpfc_fabric_abort_vport - Abort a vport's iocbs from driver fabric iocb list
11329  * @vport: pointer to a virtual N_Port data structure.
11330  *
11331  * This routine aborts all the IOCBs associated with a @vport from the
11332  * driver internal fabric IOCB list. The list contains fabric IOCBs to be
11333  * issued to the ELS IOCB ring. This abort function walks the fabric IOCB
11334  * list, removes each IOCB associated with the @vport off the list, set the
11335  * status field to IOSTAT_LOCAL_REJECT, and invokes the callback function
11336  * associated with the IOCB.
11337  **/
11338 static void lpfc_fabric_abort_vport(struct lpfc_vport *vport)
11339 {
11340         LIST_HEAD(completions);
11341         struct lpfc_hba  *phba = vport->phba;
11342         struct lpfc_iocbq *tmp_iocb, *piocb;
11343
11344         spin_lock_irq(&phba->hbalock);
11345         list_for_each_entry_safe(piocb, tmp_iocb, &phba->fabric_iocb_list,
11346                                  list) {
11347
11348                 if (piocb->vport != vport)
11349                         continue;
11350
11351                 list_move_tail(&piocb->list, &completions);
11352         }
11353         spin_unlock_irq(&phba->hbalock);
11354
11355         /* Cancel all the IOCBs from the completions list */
11356         lpfc_sli_cancel_iocbs(phba, &completions, IOSTAT_LOCAL_REJECT,
11357                               IOERR_SLI_ABORTED);
11358 }
11359
11360 /**
11361  * lpfc_fabric_abort_nport - Abort a ndlp's iocbs from driver fabric iocb list
11362  * @ndlp: pointer to a node-list data structure.
11363  *
11364  * This routine aborts all the IOCBs associated with an @ndlp from the
11365  * driver internal fabric IOCB list. The list contains fabric IOCBs to be
11366  * issued to the ELS IOCB ring. This abort function walks the fabric IOCB
11367  * list, removes each IOCB associated with the @ndlp off the list, set the
11368  * status field to IOSTAT_LOCAL_REJECT, and invokes the callback function
11369  * associated with the IOCB.
11370  **/
11371 void lpfc_fabric_abort_nport(struct lpfc_nodelist *ndlp)
11372 {
11373         LIST_HEAD(completions);
11374         struct lpfc_hba  *phba = ndlp->phba;
11375         struct lpfc_iocbq *tmp_iocb, *piocb;
11376         struct lpfc_sli_ring *pring;
11377
11378         pring = lpfc_phba_elsring(phba);
11379
11380         if (unlikely(!pring))
11381                 return;
11382
11383         spin_lock_irq(&phba->hbalock);
11384         list_for_each_entry_safe(piocb, tmp_iocb, &phba->fabric_iocb_list,
11385                                  list) {
11386                 if ((lpfc_check_sli_ndlp(phba, pring, piocb, ndlp))) {
11387
11388                         list_move_tail(&piocb->list, &completions);
11389                 }
11390         }
11391         spin_unlock_irq(&phba->hbalock);
11392
11393         /* Cancel all the IOCBs from the completions list */
11394         lpfc_sli_cancel_iocbs(phba, &completions, IOSTAT_LOCAL_REJECT,
11395                               IOERR_SLI_ABORTED);
11396 }
11397
11398 /**
11399  * lpfc_fabric_abort_hba - Abort all iocbs on driver fabric iocb list
11400  * @phba: pointer to lpfc hba data structure.
11401  *
11402  * This routine aborts all the IOCBs currently on the driver internal
11403  * fabric IOCB list. The list contains fabric IOCBs to be issued to the ELS
11404  * IOCB ring. This function takes the entire IOCB list off the fabric IOCB
11405  * list, removes IOCBs off the list, set the status field to
11406  * IOSTAT_LOCAL_REJECT, and invokes the callback function associated with
11407  * the IOCB.
11408  **/
11409 void lpfc_fabric_abort_hba(struct lpfc_hba *phba)
11410 {
11411         LIST_HEAD(completions);
11412
11413         spin_lock_irq(&phba->hbalock);
11414         list_splice_init(&phba->fabric_iocb_list, &completions);
11415         spin_unlock_irq(&phba->hbalock);
11416
11417         /* Cancel all the IOCBs from the completions list */
11418         lpfc_sli_cancel_iocbs(phba, &completions, IOSTAT_LOCAL_REJECT,
11419                               IOERR_SLI_ABORTED);
11420 }
11421
11422 /**
11423  * lpfc_sli4_vport_delete_els_xri_aborted -Remove all ndlp references for vport
11424  * @vport: pointer to lpfc vport data structure.
11425  *
11426  * This routine is invoked by the vport cleanup for deletions and the cleanup
11427  * for an ndlp on removal.
11428  **/
11429 void
11430 lpfc_sli4_vport_delete_els_xri_aborted(struct lpfc_vport *vport)
11431 {
11432         struct lpfc_hba *phba = vport->phba;
11433         struct lpfc_sglq *sglq_entry = NULL, *sglq_next = NULL;
11434         struct lpfc_nodelist *ndlp = NULL;
11435         unsigned long iflag = 0;
11436
11437         spin_lock_irqsave(&phba->sli4_hba.sgl_list_lock, iflag);
11438         list_for_each_entry_safe(sglq_entry, sglq_next,
11439                         &phba->sli4_hba.lpfc_abts_els_sgl_list, list) {
11440                 if (sglq_entry->ndlp && sglq_entry->ndlp->vport == vport) {
11441                         lpfc_nlp_put(sglq_entry->ndlp);
11442                         ndlp = sglq_entry->ndlp;
11443                         sglq_entry->ndlp = NULL;
11444
11445                         /* If the xri on the abts_els_sgl list is for the Fport
11446                          * node and the vport is unloading, the xri aborted wcqe
11447                          * likely isn't coming back.  Just release the sgl.
11448                          */
11449                         if ((vport->load_flag & FC_UNLOADING) &&
11450                             ndlp->nlp_DID == Fabric_DID) {
11451                                 list_del(&sglq_entry->list);
11452                                 sglq_entry->state = SGL_FREED;
11453                                 list_add_tail(&sglq_entry->list,
11454                                         &phba->sli4_hba.lpfc_els_sgl_list);
11455                         }
11456                 }
11457         }
11458         spin_unlock_irqrestore(&phba->sli4_hba.sgl_list_lock, iflag);
11459         return;
11460 }
11461
11462 /**
11463  * lpfc_sli4_els_xri_aborted - Slow-path process of els xri abort
11464  * @phba: pointer to lpfc hba data structure.
11465  * @axri: pointer to the els xri abort wcqe structure.
11466  *
11467  * This routine is invoked by the worker thread to process a SLI4 slow-path
11468  * ELS aborted xri.
11469  **/
11470 void
11471 lpfc_sli4_els_xri_aborted(struct lpfc_hba *phba,
11472                           struct sli4_wcqe_xri_aborted *axri)
11473 {
11474         uint16_t xri = bf_get(lpfc_wcqe_xa_xri, axri);
11475         uint16_t rxid = bf_get(lpfc_wcqe_xa_remote_xid, axri);
11476         uint16_t lxri = 0;
11477
11478         struct lpfc_sglq *sglq_entry = NULL, *sglq_next = NULL;
11479         unsigned long iflag = 0;
11480         struct lpfc_nodelist *ndlp;
11481         struct lpfc_sli_ring *pring;
11482
11483         pring = lpfc_phba_elsring(phba);
11484
11485         spin_lock_irqsave(&phba->sli4_hba.sgl_list_lock, iflag);
11486         list_for_each_entry_safe(sglq_entry, sglq_next,
11487                         &phba->sli4_hba.lpfc_abts_els_sgl_list, list) {
11488                 if (sglq_entry->sli4_xritag == xri) {
11489                         list_del(&sglq_entry->list);
11490                         ndlp = sglq_entry->ndlp;
11491                         sglq_entry->ndlp = NULL;
11492                         list_add_tail(&sglq_entry->list,
11493                                 &phba->sli4_hba.lpfc_els_sgl_list);
11494                         sglq_entry->state = SGL_FREED;
11495                         spin_unlock_irqrestore(&phba->sli4_hba.sgl_list_lock,
11496                                                iflag);
11497
11498                         if (ndlp) {
11499                                 lpfc_set_rrq_active(phba, ndlp,
11500                                         sglq_entry->sli4_lxritag,
11501                                         rxid, 1);
11502                                 lpfc_nlp_put(ndlp);
11503                         }
11504
11505                         /* Check if TXQ queue needs to be serviced */
11506                         if (pring && !list_empty(&pring->txq))
11507                                 lpfc_worker_wake_up(phba);
11508                         return;
11509                 }
11510         }
11511         spin_unlock_irqrestore(&phba->sli4_hba.sgl_list_lock, iflag);
11512         lxri = lpfc_sli4_xri_inrange(phba, xri);
11513         if (lxri == NO_XRI)
11514                 return;
11515
11516         spin_lock_irqsave(&phba->hbalock, iflag);
11517         sglq_entry = __lpfc_get_active_sglq(phba, lxri);
11518         if (!sglq_entry || (sglq_entry->sli4_xritag != xri)) {
11519                 spin_unlock_irqrestore(&phba->hbalock, iflag);
11520                 return;
11521         }
11522         sglq_entry->state = SGL_XRI_ABORTED;
11523         spin_unlock_irqrestore(&phba->hbalock, iflag);
11524         return;
11525 }
11526
11527 /* lpfc_sli_abts_recover_port - Recover a port that failed a BLS_ABORT req.
11528  * @vport: pointer to virtual port object.
11529  * @ndlp: nodelist pointer for the impacted node.
11530  *
11531  * The driver calls this routine in response to an SLI4 XRI ABORT CQE
11532  * or an SLI3 ASYNC_STATUS_CN event from the port.  For either event,
11533  * the driver is required to send a LOGO to the remote node before it
11534  * attempts to recover its login to the remote node.
11535  */
11536 void
11537 lpfc_sli_abts_recover_port(struct lpfc_vport *vport,
11538                            struct lpfc_nodelist *ndlp)
11539 {
11540         struct Scsi_Host *shost;
11541         struct lpfc_hba *phba;
11542         unsigned long flags = 0;
11543
11544         shost = lpfc_shost_from_vport(vport);
11545         phba = vport->phba;
11546         if (ndlp->nlp_state != NLP_STE_MAPPED_NODE) {
11547                 lpfc_printf_log(phba, KERN_INFO,
11548                                 LOG_SLI, "3093 No rport recovery needed. "
11549                                 "rport in state 0x%x\n", ndlp->nlp_state);
11550                 return;
11551         }
11552         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
11553                         "3094 Start rport recovery on shost id 0x%x "
11554                         "fc_id 0x%06x vpi 0x%x rpi 0x%x state 0x%x "
11555                         "flags 0x%x\n",
11556                         shost->host_no, ndlp->nlp_DID,
11557                         vport->vpi, ndlp->nlp_rpi, ndlp->nlp_state,
11558                         ndlp->nlp_flag);
11559         /*
11560          * The rport is not responding.  Remove the FCP-2 flag to prevent
11561          * an ADISC in the follow-up recovery code.
11562          */
11563         spin_lock_irqsave(&ndlp->lock, flags);
11564         ndlp->nlp_fcp_info &= ~NLP_FCP_2_DEVICE;
11565         ndlp->nlp_flag |= NLP_ISSUE_LOGO;
11566         spin_unlock_irqrestore(&ndlp->lock, flags);
11567         lpfc_unreg_rpi(vport, ndlp);
11568 }
11569
11570 static void lpfc_init_cs_ctl_bitmap(struct lpfc_vport *vport)
11571 {
11572         bitmap_zero(vport->vmid_priority_range, LPFC_VMID_MAX_PRIORITY_RANGE);
11573 }
11574
11575 static void
11576 lpfc_vmid_set_cs_ctl_range(struct lpfc_vport *vport, u32 min, u32 max)
11577 {
11578         u32 i;
11579
11580         if ((min > max) || (max > LPFC_VMID_MAX_PRIORITY_RANGE))
11581                 return;
11582
11583         for (i = min; i <= max; i++)
11584                 set_bit(i, vport->vmid_priority_range);
11585 }
11586
11587 static void lpfc_vmid_put_cs_ctl(struct lpfc_vport *vport, u32 ctcl_vmid)
11588 {
11589         set_bit(ctcl_vmid, vport->vmid_priority_range);
11590 }
11591
11592 u32 lpfc_vmid_get_cs_ctl(struct lpfc_vport *vport)
11593 {
11594         u32 i;
11595
11596         i = find_first_bit(vport->vmid_priority_range,
11597                            LPFC_VMID_MAX_PRIORITY_RANGE);
11598
11599         if (i == LPFC_VMID_MAX_PRIORITY_RANGE)
11600                 return 0;
11601
11602         clear_bit(i, vport->vmid_priority_range);
11603         return i;
11604 }
11605
11606 #define MAX_PRIORITY_DESC       255
11607
11608 static void
11609 lpfc_cmpl_els_qfpa(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
11610                    struct lpfc_iocbq *rspiocb)
11611 {
11612         struct lpfc_vport *vport = cmdiocb->vport;
11613         struct priority_range_desc *desc;
11614         struct lpfc_dmabuf *prsp = NULL;
11615         struct lpfc_vmid_priority_range *vmid_range = NULL;
11616         u32 *data;
11617         struct lpfc_dmabuf *dmabuf = cmdiocb->context2;
11618         IOCB_t *irsp = &rspiocb->iocb;
11619         u8 *pcmd, max_desc;
11620         u32 len, i;
11621         struct lpfc_nodelist *ndlp = (struct lpfc_nodelist *)cmdiocb->context1;
11622
11623         prsp = list_get_first(&dmabuf->list, struct lpfc_dmabuf, list);
11624         if (!prsp)
11625                 goto out;
11626
11627         pcmd = prsp->virt;
11628         data = (u32 *)pcmd;
11629         if (data[0] == ELS_CMD_LS_RJT) {
11630                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_SLI,
11631                                  "3277 QFPA LS_RJT x%x  x%x\n",
11632                                  data[0], data[1]);
11633                 goto out;
11634         }
11635         if (irsp->ulpStatus) {
11636                 lpfc_printf_vlog(vport, KERN_ERR, LOG_SLI,
11637                                  "6529 QFPA failed with status x%x  x%x\n",
11638                                  irsp->ulpStatus, irsp->un.ulpWord[4]);
11639                 goto out;
11640         }
11641
11642         if (!vport->qfpa_res) {
11643                 max_desc = FCELSSIZE / sizeof(*vport->qfpa_res);
11644                 vport->qfpa_res = kcalloc(max_desc, sizeof(*vport->qfpa_res),
11645                                           GFP_KERNEL);
11646                 if (!vport->qfpa_res)
11647                         goto out;
11648         }
11649
11650         len = *((u32 *)(pcmd + 4));
11651         len = be32_to_cpu(len);
11652         memcpy(vport->qfpa_res, pcmd, len + 8);
11653         len = len / LPFC_PRIORITY_RANGE_DESC_SIZE;
11654
11655         desc = (struct priority_range_desc *)(pcmd + 8);
11656         vmid_range = vport->vmid_priority.vmid_range;
11657         if (!vmid_range) {
11658                 vmid_range = kcalloc(MAX_PRIORITY_DESC, sizeof(*vmid_range),
11659                                      GFP_KERNEL);
11660                 if (!vmid_range) {
11661                         kfree(vport->qfpa_res);
11662                         goto out;
11663                 }
11664                 vport->vmid_priority.vmid_range = vmid_range;
11665         }
11666         vport->vmid_priority.num_descriptors = len;
11667
11668         for (i = 0; i < len; i++, vmid_range++, desc++) {
11669                 lpfc_printf_vlog(vport, KERN_DEBUG, LOG_ELS,
11670                                  "6539 vmid values low=%d, high=%d, qos=%d, "
11671                                  "local ve id=%d\n", desc->lo_range,
11672                                  desc->hi_range, desc->qos_priority,
11673                                  desc->local_ve_id);
11674
11675                 vmid_range->low = desc->lo_range << 1;
11676                 if (desc->local_ve_id == QFPA_ODD_ONLY)
11677                         vmid_range->low++;
11678                 if (desc->qos_priority)
11679                         vport->vmid_flag |= LPFC_VMID_QOS_ENABLED;
11680                 vmid_range->qos = desc->qos_priority;
11681
11682                 vmid_range->high = desc->hi_range << 1;
11683                 if ((desc->local_ve_id == QFPA_ODD_ONLY) ||
11684                     (desc->local_ve_id == QFPA_EVEN_ODD))
11685                         vmid_range->high++;
11686         }
11687         lpfc_init_cs_ctl_bitmap(vport);
11688         for (i = 0; i < vport->vmid_priority.num_descriptors; i++) {
11689                 lpfc_vmid_set_cs_ctl_range(vport,
11690                                 vport->vmid_priority.vmid_range[i].low,
11691                                 vport->vmid_priority.vmid_range[i].high);
11692         }
11693
11694         vport->vmid_flag |= LPFC_VMID_QFPA_CMPL;
11695  out:
11696         lpfc_els_free_iocb(phba, cmdiocb);
11697         lpfc_nlp_put(ndlp);
11698 }
11699
11700 int lpfc_issue_els_qfpa(struct lpfc_vport *vport)
11701 {
11702         struct lpfc_hba *phba = vport->phba;
11703         struct lpfc_nodelist *ndlp;
11704         struct lpfc_iocbq *elsiocb;
11705         u8 *pcmd;
11706         int ret;
11707
11708         ndlp = lpfc_findnode_did(phba->pport, Fabric_DID);
11709         if (!ndlp || ndlp->nlp_state != NLP_STE_UNMAPPED_NODE)
11710                 return -ENXIO;
11711
11712         elsiocb = lpfc_prep_els_iocb(vport, 1, LPFC_QFPA_SIZE, 2, ndlp,
11713                                      ndlp->nlp_DID, ELS_CMD_QFPA);
11714         if (!elsiocb)
11715                 return -ENOMEM;
11716
11717         pcmd = (u8 *)(((struct lpfc_dmabuf *)elsiocb->context2)->virt);
11718
11719         *((u32 *)(pcmd)) = ELS_CMD_QFPA;
11720         pcmd += 4;
11721
11722         elsiocb->iocb_cmpl = lpfc_cmpl_els_qfpa;
11723
11724         elsiocb->context1 = lpfc_nlp_get(ndlp);
11725         if (!elsiocb->context1) {
11726                 lpfc_els_free_iocb(vport->phba, elsiocb);
11727                 return -ENXIO;
11728         }
11729
11730         ret = lpfc_sli_issue_iocb(phba, LPFC_ELS_RING, elsiocb, 2);
11731         if (ret != IOCB_SUCCESS) {
11732                 lpfc_els_free_iocb(phba, elsiocb);
11733                 lpfc_nlp_put(ndlp);
11734                 return -EIO;
11735         }
11736         vport->vmid_flag &= ~LPFC_VMID_QOS_ENABLED;
11737         return 0;
11738 }
11739
11740 int
11741 lpfc_vmid_uvem(struct lpfc_vport *vport,
11742                struct lpfc_vmid *vmid, bool instantiated)
11743 {
11744         struct lpfc_vem_id_desc *vem_id_desc;
11745         struct lpfc_nodelist *ndlp;
11746         struct lpfc_iocbq *elsiocb;
11747         struct instantiated_ve_desc *inst_desc;
11748         struct lpfc_vmid_context *vmid_context;
11749         u8 *pcmd;
11750         u32 *len;
11751         int ret = 0;
11752
11753         ndlp = lpfc_findnode_did(vport, Fabric_DID);
11754         if (!ndlp || ndlp->nlp_state != NLP_STE_UNMAPPED_NODE)
11755                 return -ENXIO;
11756
11757         vmid_context = kmalloc(sizeof(*vmid_context), GFP_KERNEL);
11758         if (!vmid_context)
11759                 return -ENOMEM;
11760         elsiocb = lpfc_prep_els_iocb(vport, 1, LPFC_UVEM_SIZE, 2,
11761                                      ndlp, Fabric_DID, ELS_CMD_UVEM);
11762         if (!elsiocb)
11763                 goto out;
11764
11765         lpfc_printf_vlog(vport, KERN_DEBUG, LOG_ELS,
11766                          "3427 Host vmid %s %d\n",
11767                          vmid->host_vmid, instantiated);
11768         vmid_context->vmp = vmid;
11769         vmid_context->nlp = ndlp;
11770         vmid_context->instantiated = instantiated;
11771         elsiocb->vmid_tag.vmid_context = vmid_context;
11772         pcmd = (u8 *)(((struct lpfc_dmabuf *)elsiocb->context2)->virt);
11773
11774         if (uuid_is_null((uuid_t *)vport->lpfc_vmid_host_uuid))
11775                 memcpy(vport->lpfc_vmid_host_uuid, vmid->host_vmid,
11776                        LPFC_COMPRESS_VMID_SIZE);
11777
11778         *((u32 *)(pcmd)) = ELS_CMD_UVEM;
11779         len = (u32 *)(pcmd + 4);
11780         *len = cpu_to_be32(LPFC_UVEM_SIZE - 8);
11781
11782         vem_id_desc = (struct lpfc_vem_id_desc *)(pcmd + 8);
11783         vem_id_desc->tag = be32_to_cpu(VEM_ID_DESC_TAG);
11784         vem_id_desc->length = be32_to_cpu(LPFC_UVEM_VEM_ID_DESC_SIZE);
11785         memcpy(vem_id_desc->vem_id, vport->lpfc_vmid_host_uuid,
11786                LPFC_COMPRESS_VMID_SIZE);
11787
11788         inst_desc = (struct instantiated_ve_desc *)(pcmd + 32);
11789         inst_desc->tag = be32_to_cpu(INSTANTIATED_VE_DESC_TAG);
11790         inst_desc->length = be32_to_cpu(LPFC_UVEM_VE_MAP_DESC_SIZE);
11791         memcpy(inst_desc->global_vem_id, vmid->host_vmid,
11792                LPFC_COMPRESS_VMID_SIZE);
11793
11794         bf_set(lpfc_instantiated_nport_id, inst_desc, vport->fc_myDID);
11795         bf_set(lpfc_instantiated_local_id, inst_desc,
11796                vmid->un.cs_ctl_vmid);
11797         if (instantiated) {
11798                 inst_desc->tag = be32_to_cpu(INSTANTIATED_VE_DESC_TAG);
11799         } else {
11800                 inst_desc->tag = be32_to_cpu(DEINSTANTIATED_VE_DESC_TAG);
11801                 lpfc_vmid_put_cs_ctl(vport, vmid->un.cs_ctl_vmid);
11802         }
11803         inst_desc->word6 = cpu_to_be32(inst_desc->word6);
11804
11805         elsiocb->iocb_cmpl = lpfc_cmpl_els_uvem;
11806
11807         elsiocb->context1 = lpfc_nlp_get(ndlp);
11808         if (!elsiocb->context1) {
11809                 lpfc_els_free_iocb(vport->phba, elsiocb);
11810                 goto out;
11811         }
11812
11813         ret = lpfc_sli_issue_iocb(vport->phba, LPFC_ELS_RING, elsiocb, 0);
11814         if (ret != IOCB_SUCCESS) {
11815                 lpfc_els_free_iocb(vport->phba, elsiocb);
11816                 lpfc_nlp_put(ndlp);
11817                 goto out;
11818         }
11819
11820         return 0;
11821  out:
11822         kfree(vmid_context);
11823         return -EIO;
11824 }
11825
11826 static void
11827 lpfc_cmpl_els_uvem(struct lpfc_hba *phba, struct lpfc_iocbq *icmdiocb,
11828                    struct lpfc_iocbq *rspiocb)
11829 {
11830         struct lpfc_vport *vport = icmdiocb->vport;
11831         struct lpfc_dmabuf *prsp = NULL;
11832         struct lpfc_vmid_context *vmid_context =
11833             icmdiocb->vmid_tag.vmid_context;
11834         struct lpfc_nodelist *ndlp = icmdiocb->context1;
11835         u8 *pcmd;
11836         u32 *data;
11837         IOCB_t *irsp = &rspiocb->iocb;
11838         struct lpfc_dmabuf *dmabuf = icmdiocb->context2;
11839         struct lpfc_vmid *vmid;
11840
11841         vmid = vmid_context->vmp;
11842         if (!ndlp || ndlp->nlp_state != NLP_STE_UNMAPPED_NODE)
11843                 ndlp = NULL;
11844
11845         prsp = list_get_first(&dmabuf->list, struct lpfc_dmabuf, list);
11846         if (!prsp)
11847                 goto out;
11848         pcmd = prsp->virt;
11849         data = (u32 *)pcmd;
11850         if (data[0] == ELS_CMD_LS_RJT) {
11851                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_SLI,
11852                                  "4532 UVEM LS_RJT %x %x\n", data[0], data[1]);
11853                 goto out;
11854         }
11855         if (irsp->ulpStatus) {
11856                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_SLI,
11857                                  "4533 UVEM error status %x: %x\n",
11858                                  irsp->ulpStatus, irsp->un.ulpWord[4]);
11859                 goto out;
11860         }
11861         spin_lock(&phba->hbalock);
11862         /* Set IN USE flag */
11863         vport->vmid_flag |= LPFC_VMID_IN_USE;
11864         phba->pport->vmid_flag |= LPFC_VMID_IN_USE;
11865         spin_unlock(&phba->hbalock);
11866
11867         if (vmid_context->instantiated) {
11868                 write_lock(&vport->vmid_lock);
11869                 vmid->flag |= LPFC_VMID_REGISTERED;
11870                 vmid->flag &= ~LPFC_VMID_REQ_REGISTER;
11871                 write_unlock(&vport->vmid_lock);
11872         }
11873
11874  out:
11875         kfree(vmid_context);
11876         lpfc_els_free_iocb(phba, icmdiocb);
11877         lpfc_nlp_put(ndlp);
11878 }