drivers/scsi/lpfc/lpfc_nportdisc.c

   1 /*******************************************************************
   2  * This file is part of the Emulex Linux Device Driver for         *
   3  * Fibre Channel Host Bus Adapters.                                *
   4  * Copyright (C) 2017-2018 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
  24 #include <linux/blkdev.h>
  25 #include <linux/pci.h>
  26 #include <linux/slab.h>
  27 #include <linux/interrupt.h>
  28
  29 #include <scsi/scsi.h>
  30 #include <scsi/scsi_device.h>
  31 #include <scsi/scsi_host.h>
  32 #include <scsi/scsi_transport_fc.h>
  33 #include <scsi/fc/fc_fs.h>
  34
  35 #include <linux/nvme-fc-driver.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.h"
  44 #include "lpfc_scsi.h"
  45 #include "lpfc_nvme.h"
  46 #include "lpfc_logmsg.h"
  47 #include "lpfc_crtn.h"
  48 #include "lpfc_vport.h"
  49 #include "lpfc_debugfs.h"
  50
  51
  52 /* Called to verify a rcv'ed ADISC was intended for us. */
  53 static int
  54 lpfc_check_adisc(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
  55                  struct lpfc_name *nn, struct lpfc_name *pn)
  56 {
  57         /* First, we MUST have a RPI registered */
  58         if (!(ndlp->nlp_flag & NLP_RPI_REGISTERED))
  59                 return 0;
  60
  61         /* Compare the ADISC rsp WWNN / WWPN matches our internal node
  62          * table entry for that node.
  63          */
  64         if (memcmp(nn, &ndlp->nlp_nodename, sizeof (struct lpfc_name)))
  65                 return 0;
  66
  67         if (memcmp(pn, &ndlp->nlp_portname, sizeof (struct lpfc_name)))
  68                 return 0;
  69
  70         /* we match, return success */
  71         return 1;
  72 }
  73
  74 int
  75 lpfc_check_sparm(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
  76                  struct serv_parm *sp, uint32_t class, int flogi)
  77 {
  78         volatile struct serv_parm *hsp = &vport->fc_sparam;
  79         uint16_t hsp_value, ssp_value = 0;
  80
  81         /*
  82          * The receive data field size and buffer-to-buffer receive data field
  83          * size entries are 16 bits but are represented as two 8-bit fields in
  84          * the driver data structure to account for rsvd bits and other control
  85          * bits.  Reconstruct and compare the fields as a 16-bit values before
  86          * correcting the byte values.
  87          */
  88         if (sp->cls1.classValid) {
  89                 if (!flogi) {
  90                         hsp_value = ((hsp->cls1.rcvDataSizeMsb << 8) |
  91                                      hsp->cls1.rcvDataSizeLsb);
  92                         ssp_value = ((sp->cls1.rcvDataSizeMsb << 8) |
  93                                      sp->cls1.rcvDataSizeLsb);
  94                         if (!ssp_value)
  95                                 goto bad_service_param;
  96                         if (ssp_value > hsp_value) {
  97                                 sp->cls1.rcvDataSizeLsb =
  98                                         hsp->cls1.rcvDataSizeLsb;
  99                                 sp->cls1.rcvDataSizeMsb =
 100                                         hsp->cls1.rcvDataSizeMsb;
 101                         }
 102                 }
 103         } else if (class == CLASS1)
 104                 goto bad_service_param;
 105         if (sp->cls2.classValid) {
 106                 if (!flogi) {
 107                         hsp_value = ((hsp->cls2.rcvDataSizeMsb << 8) |
 108                                      hsp->cls2.rcvDataSizeLsb);
 109                         ssp_value = ((sp->cls2.rcvDataSizeMsb << 8) |
 110                                      sp->cls2.rcvDataSizeLsb);
 111                         if (!ssp_value)
 112                                 goto bad_service_param;
 113                         if (ssp_value > hsp_value) {
 114                                 sp->cls2.rcvDataSizeLsb =
 115                                         hsp->cls2.rcvDataSizeLsb;
 116                                 sp->cls2.rcvDataSizeMsb =
 117                                         hsp->cls2.rcvDataSizeMsb;
 118                         }
 119                 }
 120         } else if (class == CLASS2)
 121                 goto bad_service_param;
 122         if (sp->cls3.classValid) {
 123                 if (!flogi) {
 124                         hsp_value = ((hsp->cls3.rcvDataSizeMsb << 8) |
 125                                      hsp->cls3.rcvDataSizeLsb);
 126                         ssp_value = ((sp->cls3.rcvDataSizeMsb << 8) |
 127                                      sp->cls3.rcvDataSizeLsb);
 128                         if (!ssp_value)
 129                                 goto bad_service_param;
 130                         if (ssp_value > hsp_value) {
 131                                 sp->cls3.rcvDataSizeLsb =
 132                                         hsp->cls3.rcvDataSizeLsb;
 133                                 sp->cls3.rcvDataSizeMsb =
 134                                         hsp->cls3.rcvDataSizeMsb;
 135                         }
 136                 }
 137         } else if (class == CLASS3)
 138                 goto bad_service_param;
 139
 140         /*
 141          * Preserve the upper four bits of the MSB from the PLOGI response.
 142          * These bits contain the Buffer-to-Buffer State Change Number
 143          * from the target and need to be passed to the FW.
 144          */
 145         hsp_value = (hsp->cmn.bbRcvSizeMsb << 8) | hsp->cmn.bbRcvSizeLsb;
 146         ssp_value = (sp->cmn.bbRcvSizeMsb << 8) | sp->cmn.bbRcvSizeLsb;
 147         if (ssp_value > hsp_value) {
 148                 sp->cmn.bbRcvSizeLsb = hsp->cmn.bbRcvSizeLsb;
 149                 sp->cmn.bbRcvSizeMsb = (sp->cmn.bbRcvSizeMsb & 0xF0) |
 150                                        (hsp->cmn.bbRcvSizeMsb & 0x0F);
 151         }
 152
 153         memcpy(&ndlp->nlp_nodename, &sp->nodeName, sizeof (struct lpfc_name));
 154         memcpy(&ndlp->nlp_portname, &sp->portName, sizeof (struct lpfc_name));
 155         return 1;
 156 bad_service_param:
 157         lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
 158                          "0207 Device %x "
 159                          "(%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x) sent "
 160                          "invalid service parameters.  Ignoring device.\n",
 161                          ndlp->nlp_DID,
 162                          sp->nodeName.u.wwn[0], sp->nodeName.u.wwn[1],
 163                          sp->nodeName.u.wwn[2], sp->nodeName.u.wwn[3],
 164                          sp->nodeName.u.wwn[4], sp->nodeName.u.wwn[5],
 165                          sp->nodeName.u.wwn[6], sp->nodeName.u.wwn[7]);
 166         return 0;
 167 }
 168
 169 static void *
 170 lpfc_check_elscmpl_iocb(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
 171                         struct lpfc_iocbq *rspiocb)
 172 {
 173         struct lpfc_dmabuf *pcmd, *prsp;
 174         uint32_t *lp;
 175         void     *ptr = NULL;
 176         IOCB_t   *irsp;
 177
 178         irsp = &rspiocb->iocb;
 179         pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
 180
 181         /* For lpfc_els_abort, context2 could be zero'ed to delay
 182          * freeing associated memory till after ABTS completes.
 183          */
 184         if (pcmd) {
 185                 prsp =  list_get_first(&pcmd->list, struct lpfc_dmabuf,
 186                                        list);
 187                 if (prsp) {
 188                         lp = (uint32_t *) prsp->virt;
 189                         ptr = (void *)((uint8_t *)lp + sizeof(uint32_t));
 190                 }
 191         } else {
 192                 /* Force ulpStatus error since we are returning NULL ptr */
 193                 if (!(irsp->ulpStatus)) {
 194                         irsp->ulpStatus = IOSTAT_LOCAL_REJECT;
 195                         irsp->un.ulpWord[4] = IOERR_SLI_ABORTED;
 196                 }
 197                 ptr = NULL;
 198         }
 199         return ptr;
 200 }
 201
 202
 203
 204 /*
 205  * Free resources / clean up outstanding I/Os
 206  * associated with a LPFC_NODELIST entry. This
 207  * routine effectively results in a "software abort".
 208  */
 209 void
 210 lpfc_els_abort(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
 211 {
 212         LIST_HEAD(abort_list);
 213         struct lpfc_sli_ring *pring;
 214         struct lpfc_iocbq *iocb, *next_iocb;
 215
 216         pring = lpfc_phba_elsring(phba);
 217
 218         /* In case of error recovery path, we might have a NULL pring here */
 219         if (unlikely(!pring))
 220                 return;
 221
 222         /* Abort outstanding I/O on NPort <nlp_DID> */
 223         lpfc_printf_vlog(ndlp->vport, KERN_INFO, LOG_DISCOVERY,
 224                          "2819 Abort outstanding I/O on NPort x%x "
 225                          "Data: x%x x%x x%x\n",
 226                          ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
 227                          ndlp->nlp_rpi);
 228         /* Clean up all fabric IOs first.*/
 229         lpfc_fabric_abort_nport(ndlp);
 230
 231         /*
 232          * Lock the ELS ring txcmplq for SLI3/SLI4 and build a local list
 233          * of all ELS IOs that need an ABTS.  The IOs need to stay on the
 234          * txcmplq so that the abort operation completes them successfully.
 235          */
 236         spin_lock_irq(&phba->hbalock);
 237         if (phba->sli_rev == LPFC_SLI_REV4)
 238                 spin_lock(&pring->ring_lock);
 239         list_for_each_entry_safe(iocb, next_iocb, &pring->txcmplq, list) {
 240         /* Add to abort_list on on NDLP match. */
 241                 if (lpfc_check_sli_ndlp(phba, pring, iocb, ndlp))
 242                         list_add_tail(&iocb->dlist, &abort_list);
 243         }
 244         if (phba->sli_rev == LPFC_SLI_REV4)
 245                 spin_unlock(&pring->ring_lock);
 246         spin_unlock_irq(&phba->hbalock);
 247
 248         /* Abort the targeted IOs and remove them from the abort list. */
 249         list_for_each_entry_safe(iocb, next_iocb, &abort_list, dlist) {
 250                         spin_lock_irq(&phba->hbalock);
 251                         list_del_init(&iocb->dlist);
 252                         lpfc_sli_issue_abort_iotag(phba, pring, iocb);
 253                         spin_unlock_irq(&phba->hbalock);
 254         }
 255
 256         INIT_LIST_HEAD(&abort_list);
 257
 258         /* Now process the txq */
 259         spin_lock_irq(&phba->hbalock);
 260         if (phba->sli_rev == LPFC_SLI_REV4)
 261                 spin_lock(&pring->ring_lock);
 262
 263         list_for_each_entry_safe(iocb, next_iocb, &pring->txq, list) {
 264                 /* Check to see if iocb matches the nport we are looking for */
 265                 if (lpfc_check_sli_ndlp(phba, pring, iocb, ndlp)) {
 266                         list_del_init(&iocb->list);
 267                         list_add_tail(&iocb->list, &abort_list);
 268                 }
 269         }
 270
 271         if (phba->sli_rev == LPFC_SLI_REV4)
 272                 spin_unlock(&pring->ring_lock);
 273         spin_unlock_irq(&phba->hbalock);
 274
 275         /* Cancel all the IOCBs from the completions list */
 276         lpfc_sli_cancel_iocbs(phba, &abort_list,
 277                               IOSTAT_LOCAL_REJECT, IOERR_SLI_ABORTED);
 278
 279         lpfc_cancel_retry_delay_tmo(phba->pport, ndlp);
 280 }
 281
 282 static int
 283 lpfc_rcv_plogi(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 284                struct lpfc_iocbq *cmdiocb)
 285 {
 286         struct Scsi_Host   *shost = lpfc_shost_from_vport(vport);
 287         struct lpfc_hba    *phba = vport->phba;
 288         struct lpfc_dmabuf *pcmd;
 289         uint64_t nlp_portwwn = 0;
 290         uint32_t *lp;
 291         IOCB_t *icmd;
 292         struct serv_parm *sp;
 293         uint32_t ed_tov;
 294         LPFC_MBOXQ_t *mbox;
 295         struct ls_rjt stat;
 296         uint32_t vid, flag;
 297         int rc;
 298
 299         memset(&stat, 0, sizeof (struct ls_rjt));
 300         pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
 301         lp = (uint32_t *) pcmd->virt;
 302         sp = (struct serv_parm *) ((uint8_t *) lp + sizeof (uint32_t));
 303         if (wwn_to_u64(sp->portName.u.wwn) == 0) {
 304                 lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
 305                                  "0140 PLOGI Reject: invalid nname\n");
 306                 stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
 307                 stat.un.b.lsRjtRsnCodeExp = LSEXP_INVALID_PNAME;
 308                 lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp,
 309                         NULL);
 310                 return 0;
 311         }
 312         if (wwn_to_u64(sp->nodeName.u.wwn) == 0) {
 313                 lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
 314                                  "0141 PLOGI Reject: invalid pname\n");
 315                 stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
 316                 stat.un.b.lsRjtRsnCodeExp = LSEXP_INVALID_NNAME;
 317                 lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp,
 318                         NULL);
 319                 return 0;
 320         }
 321
 322         nlp_portwwn = wwn_to_u64(ndlp->nlp_portname.u.wwn);
 323         if ((lpfc_check_sparm(vport, ndlp, sp, CLASS3, 0) == 0)) {
 324                 /* Reject this request because invalid parameters */
 325                 stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
 326                 stat.un.b.lsRjtRsnCodeExp = LSEXP_SPARM_OPTIONS;
 327                 lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp,
 328                         NULL);
 329                 return 0;
 330         }
 331         icmd = &cmdiocb->iocb;
 332
 333         /* PLOGI chkparm OK */
 334         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
 335                          "0114 PLOGI chkparm OK Data: x%x x%x x%x "
 336                          "x%x x%x x%x\n",
 337                          ndlp->nlp_DID, ndlp->nlp_state, ndlp->nlp_flag,
 338                          ndlp->nlp_rpi, vport->port_state,
 339                          vport->fc_flag);
 340
 341         if (vport->cfg_fcp_class == 2 && sp->cls2.classValid)
 342                 ndlp->nlp_fcp_info |= CLASS2;
 343         else
 344                 ndlp->nlp_fcp_info |= CLASS3;
 345
 346         ndlp->nlp_class_sup = 0;
 347         if (sp->cls1.classValid)
 348                 ndlp->nlp_class_sup |= FC_COS_CLASS1;
 349         if (sp->cls2.classValid)
 350                 ndlp->nlp_class_sup |= FC_COS_CLASS2;
 351         if (sp->cls3.classValid)
 352                 ndlp->nlp_class_sup |= FC_COS_CLASS3;
 353         if (sp->cls4.classValid)
 354                 ndlp->nlp_class_sup |= FC_COS_CLASS4;
 355         ndlp->nlp_maxframe =
 356                 ((sp->cmn.bbRcvSizeMsb & 0x0F) << 8) | sp->cmn.bbRcvSizeLsb;
 357
 358         /* if already logged in, do implicit logout */
 359         switch (ndlp->nlp_state) {
 360         case  NLP_STE_NPR_NODE:
 361                 if (!(ndlp->nlp_flag & NLP_NPR_ADISC))
 362                         break;
 363         case  NLP_STE_REG_LOGIN_ISSUE:
 364         case  NLP_STE_PRLI_ISSUE:
 365         case  NLP_STE_UNMAPPED_NODE:
 366         case  NLP_STE_MAPPED_NODE:
 367                 /* For initiators, lpfc_plogi_confirm_nport skips fabric did.
 368                  * For target mode, execute implicit logo.
 369                  * Fabric nodes go into NPR.
 370                  */
 371                 if (!(ndlp->nlp_type & NLP_FABRIC) &&
 372                     !(phba->nvmet_support)) {
 373                         lpfc_els_rsp_acc(vport, ELS_CMD_PLOGI, cmdiocb,
 374                                          ndlp, NULL);
 375                         return 1;
 376                 }
 377                 if (nlp_portwwn != 0 &&
 378                     nlp_portwwn != wwn_to_u64(sp->portName.u.wwn))
 379                         lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
 380                                          "0143 PLOGI recv'd from DID: x%x "
 381                                          "WWPN changed: old %llx new %llx\n",
 382                                          ndlp->nlp_DID,
 383                                          (unsigned long long)nlp_portwwn,
 384                                          (unsigned long long)
 385                                          wwn_to_u64(sp->portName.u.wwn));
 386
 387                 ndlp->nlp_prev_state = ndlp->nlp_state;
 388                 /* rport needs to be unregistered first */
 389                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
 390                 break;
 391         }
 392
 393         ndlp->nlp_type &= ~(NLP_FCP_TARGET | NLP_FCP_INITIATOR);
 394         ndlp->nlp_type &= ~(NLP_NVME_TARGET | NLP_NVME_INITIATOR);
 395         ndlp->nlp_fcp_info &= ~NLP_FCP_2_DEVICE;
 396         ndlp->nlp_flag &= ~NLP_FIRSTBURST;
 397
 398         /* Check for Nport to NPort pt2pt protocol */
 399         if ((vport->fc_flag & FC_PT2PT) &&
 400             !(vport->fc_flag & FC_PT2PT_PLOGI)) {
 401                 /* rcv'ed PLOGI decides what our NPortId will be */
 402                 vport->fc_myDID = icmd->un.rcvels.parmRo;
 403
 404                 ed_tov = be32_to_cpu(sp->cmn.e_d_tov);
 405                 if (sp->cmn.edtovResolution) {
 406                         /* E_D_TOV ticks are in nanoseconds */
 407                         ed_tov = (phba->fc_edtov + 999999) / 1000000;
 408                 }
 409
 410                 /*
 411                  * For pt-to-pt, use the larger EDTOV
 412                  * RATOV = 2 * EDTOV
 413                  */
 414                 if (ed_tov > phba->fc_edtov)
 415                         phba->fc_edtov = ed_tov;
 416                 phba->fc_ratov = (2 * phba->fc_edtov) / 1000;
 417
 418                 memcpy(&phba->fc_fabparam, sp, sizeof(struct serv_parm));
 419
 420                 /* Issue config_link / reg_vfi to account for updated TOV's */
 421
 422                 if (phba->sli_rev == LPFC_SLI_REV4)
 423                         lpfc_issue_reg_vfi(vport);
 424                 else {
 425                         mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
 426                         if (mbox == NULL)
 427                                 goto out;
 428                         lpfc_config_link(phba, mbox);
 429                         mbox->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
 430                         mbox->vport = vport;
 431                         rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
 432                         if (rc == MBX_NOT_FINISHED) {
 433                                 mempool_free(mbox, phba->mbox_mem_pool);
 434                                 goto out;
 435                         }
 436                 }
 437
 438                 lpfc_can_disctmo(vport);
 439         }
 440
 441         ndlp->nlp_flag &= ~NLP_SUPPRESS_RSP;
 442         if ((phba->sli.sli_flag & LPFC_SLI_SUPPRESS_RSP) &&
 443             sp->cmn.valid_vendor_ver_level) {
 444                 vid = be32_to_cpu(sp->un.vv.vid);
 445                 flag = be32_to_cpu(sp->un.vv.flags);
 446                 if ((vid == LPFC_VV_EMLX_ID) && (flag & LPFC_VV_SUPPRESS_RSP))
 447                         ndlp->nlp_flag |= NLP_SUPPRESS_RSP;
 448         }
 449
 450         mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
 451         if (!mbox)
 452                 goto out;
 453
 454         /* Registering an existing RPI behaves differently for SLI3 vs SLI4 */
 455         if (phba->sli_rev == LPFC_SLI_REV4)
 456                 lpfc_unreg_rpi(vport, ndlp);
 457
 458         rc = lpfc_reg_rpi(phba, vport->vpi, icmd->un.rcvels.remoteID,
 459                             (uint8_t *) sp, mbox, ndlp->nlp_rpi);
 460         if (rc) {
 461                 mempool_free(mbox, phba->mbox_mem_pool);
 462                 goto out;
 463         }
 464
 465         /* ACC PLOGI rsp command needs to execute first,
 466          * queue this mbox command to be processed later.
 467          */
 468         mbox->mbox_cmpl = lpfc_mbx_cmpl_reg_login;
 469         /*
 470          * mbox->context2 = lpfc_nlp_get(ndlp) deferred until mailbox
 471          * command issued in lpfc_cmpl_els_acc().
 472          */
 473         mbox->vport = vport;
 474         spin_lock_irq(shost->host_lock);
 475         ndlp->nlp_flag |= (NLP_ACC_REGLOGIN | NLP_RCV_PLOGI);
 476         spin_unlock_irq(shost->host_lock);
 477
 478         /*
 479          * If there is an outstanding PLOGI issued, abort it before
 480          * sending ACC rsp for received PLOGI. If pending plogi
 481          * is not canceled here, the plogi will be rejected by
 482          * remote port and will be retried. On a configuration with
 483          * single discovery thread, this will cause a huge delay in
 484          * discovery. Also this will cause multiple state machines
 485          * running in parallel for this node.
 486          */
 487         if (ndlp->nlp_state == NLP_STE_PLOGI_ISSUE) {
 488                 /* software abort outstanding PLOGI */
 489                 lpfc_els_abort(phba, ndlp);
 490         }
 491
 492         if ((vport->port_type == LPFC_NPIV_PORT &&
 493              vport->cfg_restrict_login)) {
 494
 495                 /* In order to preserve RPIs, we want to cleanup
 496                  * the default RPI the firmware created to rcv
 497                  * this ELS request. The only way to do this is
 498                  * to register, then unregister the RPI.
 499                  */
 500                 spin_lock_irq(shost->host_lock);
 501                 ndlp->nlp_flag |= NLP_RM_DFLT_RPI;
 502                 spin_unlock_irq(shost->host_lock);
 503                 stat.un.b.lsRjtRsnCode = LSRJT_INVALID_CMD;
 504                 stat.un.b.lsRjtRsnCodeExp = LSEXP_NOTHING_MORE;
 505                 rc = lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb,
 506                         ndlp, mbox);
 507                 if (rc)
 508                         mempool_free(mbox, phba->mbox_mem_pool);
 509                 return 1;
 510         }
 511         rc = lpfc_els_rsp_acc(vport, ELS_CMD_PLOGI, cmdiocb, ndlp, mbox);
 512         if (rc)
 513                 mempool_free(mbox, phba->mbox_mem_pool);
 514         return 1;
 515 out:
 516         stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
 517         stat.un.b.lsRjtRsnCodeExp = LSEXP_OUT_OF_RESOURCE;
 518         lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
 519         return 0;
 520 }
 521
 522 /**
 523  * lpfc_mbx_cmpl_resume_rpi - Resume RPI completion routine
 524  * @phba: pointer to lpfc hba data structure.
 525  * @mboxq: pointer to mailbox object
 526  *
 527  * This routine is invoked to issue a completion to a rcv'ed
 528  * ADISC or PDISC after the paused RPI has been resumed.
 529  **/
 530 static void
 531 lpfc_mbx_cmpl_resume_rpi(struct lpfc_hba *phba, LPFC_MBOXQ_t *mboxq)
 532 {
 533         struct lpfc_vport *vport;
 534         struct lpfc_iocbq *elsiocb;
 535         struct lpfc_nodelist *ndlp;
 536         uint32_t cmd;
 537
 538         elsiocb = (struct lpfc_iocbq *)mboxq->context1;
 539         ndlp = (struct lpfc_nodelist *) mboxq->context2;
 540         vport = mboxq->vport;
 541         cmd = elsiocb->drvrTimeout;
 542
 543         if (cmd == ELS_CMD_ADISC) {
 544                 lpfc_els_rsp_adisc_acc(vport, elsiocb, ndlp);
 545         } else {
 546                 lpfc_els_rsp_acc(vport, ELS_CMD_PLOGI, elsiocb,
 547                         ndlp, NULL);
 548         }
 549         kfree(elsiocb);
 550         mempool_free(mboxq, phba->mbox_mem_pool);
 551 }
 552
 553 static int
 554 lpfc_rcv_padisc(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 555                 struct lpfc_iocbq *cmdiocb)
 556 {
 557         struct Scsi_Host   *shost = lpfc_shost_from_vport(vport);
 558         struct lpfc_iocbq  *elsiocb;
 559         struct lpfc_dmabuf *pcmd;
 560         struct serv_parm   *sp;
 561         struct lpfc_name   *pnn, *ppn;
 562         struct ls_rjt stat;
 563         ADISC *ap;
 564         IOCB_t *icmd;
 565         uint32_t *lp;
 566         uint32_t cmd;
 567
 568         pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
 569         lp = (uint32_t *) pcmd->virt;
 570
 571         cmd = *lp++;
 572         if (cmd == ELS_CMD_ADISC) {
 573                 ap = (ADISC *) lp;
 574                 pnn = (struct lpfc_name *) & ap->nodeName;
 575                 ppn = (struct lpfc_name *) & ap->portName;
 576         } else {
 577                 sp = (struct serv_parm *) lp;
 578                 pnn = (struct lpfc_name *) & sp->nodeName;
 579                 ppn = (struct lpfc_name *) & sp->portName;
 580         }
 581
 582         icmd = &cmdiocb->iocb;
 583         if (icmd->ulpStatus == 0 && lpfc_check_adisc(vport, ndlp, pnn, ppn)) {
 584
 585                 /*
 586                  * As soon as  we send ACC, the remote NPort can
 587                  * start sending us data. Thus, for SLI4 we must
 588                  * resume the RPI before the ACC goes out.
 589                  */
 590                 if (vport->phba->sli_rev == LPFC_SLI_REV4) {
 591                         elsiocb = kmalloc(sizeof(struct lpfc_iocbq),
 592                                 GFP_KERNEL);
 593                         if (elsiocb) {
 594
 595                                 /* Save info from cmd IOCB used in rsp */
 596                                 memcpy((uint8_t *)elsiocb, (uint8_t *)cmdiocb,
 597                                         sizeof(struct lpfc_iocbq));
 598
 599                                 /* Save the ELS cmd */
 600                                 elsiocb->drvrTimeout = cmd;
 601
 602                                 lpfc_sli4_resume_rpi(ndlp,
 603                                         lpfc_mbx_cmpl_resume_rpi, elsiocb);
 604                                 goto out;
 605                         }
 606                 }
 607
 608                 if (cmd == ELS_CMD_ADISC) {
 609                         lpfc_els_rsp_adisc_acc(vport, cmdiocb, ndlp);
 610                 } else {
 611                         lpfc_els_rsp_acc(vport, ELS_CMD_PLOGI, cmdiocb,
 612                                 ndlp, NULL);
 613                 }
 614 out:
 615                 /* If we are authenticated, move to the proper state */
 616                 if (ndlp->nlp_type & NLP_FCP_TARGET)
 617                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_MAPPED_NODE);
 618                 else
 619                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
 620
 621                 return 1;
 622         }
 623         /* Reject this request because invalid parameters */
 624         stat.un.b.lsRjtRsvd0 = 0;
 625         stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
 626         stat.un.b.lsRjtRsnCodeExp = LSEXP_SPARM_OPTIONS;
 627         stat.un.b.vendorUnique = 0;
 628         lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
 629
 630         /* 1 sec timeout */
 631         mod_timer(&ndlp->nlp_delayfunc, jiffies + msecs_to_jiffies(1000));
 632
 633         spin_lock_irq(shost->host_lock);
 634         ndlp->nlp_flag |= NLP_DELAY_TMO;
 635         spin_unlock_irq(shost->host_lock);
 636         ndlp->nlp_last_elscmd = ELS_CMD_PLOGI;
 637         ndlp->nlp_prev_state = ndlp->nlp_state;
 638         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
 639         return 0;
 640 }
 641
 642 static int
 643 lpfc_rcv_logo(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 644               struct lpfc_iocbq *cmdiocb, uint32_t els_cmd)
 645 {
 646         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
 647         struct lpfc_hba    *phba = vport->phba;
 648         struct lpfc_vport **vports;
 649         int i, active_vlink_present = 0 ;
 650
 651         /* Put ndlp in NPR state with 1 sec timeout for plogi, ACC logo */
 652         /* Only call LOGO ACC for first LOGO, this avoids sending unnecessary
 653          * PLOGIs during LOGO storms from a device.
 654          */
 655         spin_lock_irq(shost->host_lock);
 656         ndlp->nlp_flag |= NLP_LOGO_ACC;
 657         spin_unlock_irq(shost->host_lock);
 658         if (els_cmd == ELS_CMD_PRLO)
 659                 lpfc_els_rsp_acc(vport, ELS_CMD_PRLO, cmdiocb, ndlp, NULL);
 660         else
 661                 lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
 662         if (ndlp->nlp_DID == Fabric_DID) {
 663                 if (vport->port_state <= LPFC_FDISC)
 664                         goto out;
 665                 lpfc_linkdown_port(vport);
 666                 spin_lock_irq(shost->host_lock);
 667                 vport->fc_flag |= FC_VPORT_LOGO_RCVD;
 668                 spin_unlock_irq(shost->host_lock);
 669                 vports = lpfc_create_vport_work_array(phba);
 670                 if (vports) {
 671                         for (i = 0; i <= phba->max_vports && vports[i] != NULL;
 672                                         i++) {
 673                                 if ((!(vports[i]->fc_flag &
 674                                         FC_VPORT_LOGO_RCVD)) &&
 675                                         (vports[i]->port_state > LPFC_FDISC)) {
 676                                         active_vlink_present = 1;
 677                                         break;
 678                                 }
 679                         }
 680                         lpfc_destroy_vport_work_array(phba, vports);
 681                 }
 682
 683                 /*
 684                  * Don't re-instantiate if vport is marked for deletion.
 685                  * If we are here first then vport_delete is going to wait
 686                  * for discovery to complete.
 687                  */
 688                 if (!(vport->load_flag & FC_UNLOADING) &&
 689                                         active_vlink_present) {
 690                         /*
 691                          * If there are other active VLinks present,
 692                          * re-instantiate the Vlink using FDISC.
 693                          */
 694                         mod_timer(&ndlp->nlp_delayfunc,
 695                                   jiffies + msecs_to_jiffies(1000));
 696                         spin_lock_irq(shost->host_lock);
 697                         ndlp->nlp_flag |= NLP_DELAY_TMO;
 698                         spin_unlock_irq(shost->host_lock);
 699                         ndlp->nlp_last_elscmd = ELS_CMD_FDISC;
 700                         vport->port_state = LPFC_FDISC;
 701                 } else {
 702                         spin_lock_irq(shost->host_lock);
 703                         phba->pport->fc_flag &= ~FC_LOGO_RCVD_DID_CHNG;
 704                         spin_unlock_irq(shost->host_lock);
 705                         lpfc_retry_pport_discovery(phba);
 706                 }
 707         } else if ((!(ndlp->nlp_type & NLP_FABRIC) &&
 708                 ((ndlp->nlp_type & NLP_FCP_TARGET) ||
 709                 !(ndlp->nlp_type & NLP_FCP_INITIATOR))) ||
 710                 (ndlp->nlp_state == NLP_STE_ADISC_ISSUE)) {
 711                 /* Only try to re-login if this is NOT a Fabric Node */
 712                 mod_timer(&ndlp->nlp_delayfunc,
 713                           jiffies + msecs_to_jiffies(1000 * 1));
 714                 spin_lock_irq(shost->host_lock);
 715                 ndlp->nlp_flag |= NLP_DELAY_TMO;
 716                 spin_unlock_irq(shost->host_lock);
 717
 718                 ndlp->nlp_last_elscmd = ELS_CMD_PLOGI;
 719         }
 720 out:
 721         ndlp->nlp_prev_state = ndlp->nlp_state;
 722         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
 723
 724         spin_lock_irq(shost->host_lock);
 725         ndlp->nlp_flag &= ~NLP_NPR_ADISC;
 726         spin_unlock_irq(shost->host_lock);
 727         /* The driver has to wait until the ACC completes before it continues
 728          * processing the LOGO.  The action will resume in
 729          * lpfc_cmpl_els_logo_acc routine. Since part of processing includes an
 730          * unreg_login, the driver waits so the ACC does not get aborted.
 731          */
 732         return 0;
 733 }
 734
 735 static uint32_t
 736 lpfc_rcv_prli_support_check(struct lpfc_vport *vport,
 737                             struct lpfc_nodelist *ndlp,
 738                             struct lpfc_iocbq *cmdiocb)
 739 {
 740         struct ls_rjt stat;
 741         uint32_t *payload;
 742         uint32_t cmd;
 743
 744         payload = ((struct lpfc_dmabuf *)cmdiocb->context2)->virt;
 745         cmd = *payload;
 746         if (vport->phba->nvmet_support) {
 747                 /* Must be a NVME PRLI */
 748                 if (cmd ==  ELS_CMD_PRLI)
 749                         goto out;
 750         } else {
 751                 /* Initiator mode. */
 752                 if (!vport->nvmei_support && (cmd == ELS_CMD_NVMEPRLI))
 753                         goto out;
 754         }
 755         return 1;
 756 out:
 757         lpfc_printf_vlog(vport, KERN_WARNING, LOG_NVME_DISC,
 758                          "6115 Rcv PRLI (%x) check failed: ndlp rpi %d "
 759                          "state x%x flags x%x\n",
 760                          cmd, ndlp->nlp_rpi, ndlp->nlp_state,
 761                          ndlp->nlp_flag);
 762         memset(&stat, 0, sizeof(struct ls_rjt));
 763         stat.un.b.lsRjtRsnCode = LSRJT_CMD_UNSUPPORTED;
 764         stat.un.b.lsRjtRsnCodeExp = LSEXP_REQ_UNSUPPORTED;
 765         lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb,
 766                             ndlp, NULL);
 767         return 0;
 768 }
 769
 770 static void
 771 lpfc_rcv_prli(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 772               struct lpfc_iocbq *cmdiocb)
 773 {
 774         struct lpfc_hba  *phba = vport->phba;
 775         struct lpfc_dmabuf *pcmd;
 776         uint32_t *lp;
 777         PRLI *npr;
 778         struct fc_rport *rport = ndlp->rport;
 779         u32 roles;
 780
 781         pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
 782         lp = (uint32_t *) pcmd->virt;
 783         npr = (PRLI *) ((uint8_t *) lp + sizeof (uint32_t));
 784
 785         if ((npr->prliType == PRLI_FCP_TYPE) ||
 786             (npr->prliType == PRLI_NVME_TYPE)) {
 787                 if (npr->initiatorFunc) {
 788                         if (npr->prliType == PRLI_FCP_TYPE)
 789                                 ndlp->nlp_type |= NLP_FCP_INITIATOR;
 790                         if (npr->prliType == PRLI_NVME_TYPE)
 791                                 ndlp->nlp_type |= NLP_NVME_INITIATOR;
 792                 }
 793                 if (npr->targetFunc) {
 794                         if (npr->prliType == PRLI_FCP_TYPE)
 795                                 ndlp->nlp_type |= NLP_FCP_TARGET;
 796                         if (npr->prliType == PRLI_NVME_TYPE)
 797                                 ndlp->nlp_type |= NLP_NVME_TARGET;
 798                         if (npr->writeXferRdyDis)
 799                                 ndlp->nlp_flag |= NLP_FIRSTBURST;
 800                 }
 801                 if (npr->Retry)
 802                         ndlp->nlp_fcp_info |= NLP_FCP_2_DEVICE;
 803
 804                 /* If this driver is in nvme target mode, set the ndlp's fc4
 805                  * type to NVME provided the PRLI response claims NVME FC4
 806                  * type.  Target mode does not issue gft_id so doesn't get
 807                  * the fc4 type set until now.
 808                  */
 809                 if (phba->nvmet_support && (npr->prliType == PRLI_NVME_TYPE)) {
 810                         ndlp->nlp_fc4_type |= NLP_FC4_NVME;
 811                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
 812                 }
 813                 if (npr->prliType == PRLI_FCP_TYPE)
 814                         ndlp->nlp_fc4_type |= NLP_FC4_FCP;
 815         }
 816         if (rport) {
 817                 /* We need to update the rport role values */
 818                 roles = FC_RPORT_ROLE_UNKNOWN;
 819                 if (ndlp->nlp_type & NLP_FCP_INITIATOR)
 820                         roles |= FC_RPORT_ROLE_FCP_INITIATOR;
 821                 if (ndlp->nlp_type & NLP_FCP_TARGET)
 822                         roles |= FC_RPORT_ROLE_FCP_TARGET;
 823
 824                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_RPORT,
 825                         "rport rolechg:   role:x%x did:x%x flg:x%x",
 826                         roles, ndlp->nlp_DID, ndlp->nlp_flag);
 827
 828                 if (phba->cfg_enable_fc4_type != LPFC_ENABLE_NVME)
 829                         fc_remote_port_rolechg(rport, roles);
 830         }
 831 }
 832
 833 static uint32_t
 834 lpfc_disc_set_adisc(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
 835 {
 836         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
 837
 838         if (!(ndlp->nlp_flag & NLP_RPI_REGISTERED)) {
 839                 ndlp->nlp_flag &= ~NLP_NPR_ADISC;
 840                 return 0;
 841         }
 842
 843         if (!(vport->fc_flag & FC_PT2PT)) {
 844                 /* Check config parameter use-adisc or FCP-2 */
 845                 if ((vport->cfg_use_adisc && (vport->fc_flag & FC_RSCN_MODE)) ||
 846                     ((ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) &&
 847                      (ndlp->nlp_type & NLP_FCP_TARGET))) {
 848                         spin_lock_irq(shost->host_lock);
 849                         ndlp->nlp_flag |= NLP_NPR_ADISC;
 850                         spin_unlock_irq(shost->host_lock);
 851                         return 1;
 852                 }
 853         }
 854         ndlp->nlp_flag &= ~NLP_NPR_ADISC;
 855         lpfc_unreg_rpi(vport, ndlp);
 856         return 0;
 857 }
 858
 859 /**
 860  * lpfc_release_rpi - Release a RPI by issuing unreg_login mailbox cmd.
 861  * @phba : Pointer to lpfc_hba structure.
 862  * @vport: Pointer to lpfc_vport structure.
 863  * @rpi  : rpi to be release.
 864  *
 865  * This function will send a unreg_login mailbox command to the firmware
 866  * to release a rpi.
 867  **/
 868 void
 869 lpfc_release_rpi(struct lpfc_hba *phba,
 870                 struct lpfc_vport *vport,
 871                 uint16_t rpi)
 872 {
 873         LPFC_MBOXQ_t *pmb;
 874         int rc;
 875
 876         pmb = (LPFC_MBOXQ_t *) mempool_alloc(phba->mbox_mem_pool,
 877                         GFP_KERNEL);
 878         if (!pmb)
 879                 lpfc_printf_vlog(vport, KERN_ERR, LOG_MBOX,
 880                         "2796 mailbox memory allocation failed \n");
 881         else {
 882                 lpfc_unreg_login(phba, vport->vpi, rpi, pmb);
 883                 pmb->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
 884                 rc = lpfc_sli_issue_mbox(phba, pmb, MBX_NOWAIT);
 885                 if (rc == MBX_NOT_FINISHED)
 886                         mempool_free(pmb, phba->mbox_mem_pool);
 887         }
 888 }
 889
 890 static uint32_t
 891 lpfc_disc_illegal(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 892                   void *arg, uint32_t evt)
 893 {
 894         struct lpfc_hba *phba;
 895         LPFC_MBOXQ_t *pmb = (LPFC_MBOXQ_t *) arg;
 896         uint16_t rpi;
 897
 898         phba = vport->phba;
 899         /* Release the RPI if reglogin completing */
 900         if (!(phba->pport->load_flag & FC_UNLOADING) &&
 901                 (evt == NLP_EVT_CMPL_REG_LOGIN) &&
 902                 (!pmb->u.mb.mbxStatus)) {
 903                 rpi = pmb->u.mb.un.varWords[0];
 904                 lpfc_release_rpi(phba, vport, rpi);
 905         }
 906         lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
 907                          "0271 Illegal State Transition: node x%x "
 908                          "event x%x, state x%x Data: x%x x%x\n",
 909                          ndlp->nlp_DID, evt, ndlp->nlp_state, ndlp->nlp_rpi,
 910                          ndlp->nlp_flag);
 911         return ndlp->nlp_state;
 912 }
 913
 914 static uint32_t
 915 lpfc_cmpl_plogi_illegal(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 916                   void *arg, uint32_t evt)
 917 {
 918         /* This transition is only legal if we previously
 919          * rcv'ed a PLOGI. Since we don't want 2 discovery threads
 920          * working on the same NPortID, do nothing for this thread
 921          * to stop it.
 922          */
 923         if (!(ndlp->nlp_flag & NLP_RCV_PLOGI)) {
 924                 lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
 925                          "0272 Illegal State Transition: node x%x "
 926                          "event x%x, state x%x Data: x%x x%x\n",
 927                          ndlp->nlp_DID, evt, ndlp->nlp_state, ndlp->nlp_rpi,
 928                          ndlp->nlp_flag);
 929         }
 930         return ndlp->nlp_state;
 931 }
 932
 933 /* Start of Discovery State Machine routines */
 934
 935 static uint32_t
 936 lpfc_rcv_plogi_unused_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 937                            void *arg, uint32_t evt)
 938 {
 939         struct lpfc_iocbq *cmdiocb;
 940
 941         cmdiocb = (struct lpfc_iocbq *) arg;
 942
 943         if (lpfc_rcv_plogi(vport, ndlp, cmdiocb)) {
 944                 return ndlp->nlp_state;
 945         }
 946         return NLP_STE_FREED_NODE;
 947 }
 948
 949 static uint32_t
 950 lpfc_rcv_els_unused_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 951                          void *arg, uint32_t evt)
 952 {
 953         lpfc_issue_els_logo(vport, ndlp, 0);
 954         return ndlp->nlp_state;
 955 }
 956
 957 static uint32_t
 958 lpfc_rcv_logo_unused_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 959                           void *arg, uint32_t evt)
 960 {
 961         struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
 962         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
 963
 964         spin_lock_irq(shost->host_lock);
 965         ndlp->nlp_flag |= NLP_LOGO_ACC;
 966         spin_unlock_irq(shost->host_lock);
 967         lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
 968
 969         return ndlp->nlp_state;
 970 }
 971
 972 static uint32_t
 973 lpfc_cmpl_logo_unused_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 974                            void *arg, uint32_t evt)
 975 {
 976         return NLP_STE_FREED_NODE;
 977 }
 978
 979 static uint32_t
 980 lpfc_device_rm_unused_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 981                            void *arg, uint32_t evt)
 982 {
 983         return NLP_STE_FREED_NODE;
 984 }
 985
 986 static uint32_t
 987 lpfc_device_recov_unused_node(struct lpfc_vport *vport,
 988                         struct lpfc_nodelist *ndlp,
 989                            void *arg, uint32_t evt)
 990 {
 991         return ndlp->nlp_state;
 992 }
 993
 994 static uint32_t
 995 lpfc_rcv_plogi_plogi_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 996                            void *arg, uint32_t evt)
 997 {
 998         struct Scsi_Host   *shost = lpfc_shost_from_vport(vport);
 999         struct lpfc_hba   *phba = vport->phba;
1000         struct lpfc_iocbq *cmdiocb = arg;
1001         struct lpfc_dmabuf *pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
1002         uint32_t *lp = (uint32_t *) pcmd->virt;
1003         struct serv_parm *sp = (struct serv_parm *) (lp + 1);
1004         struct ls_rjt stat;
1005         int port_cmp;
1006
1007         memset(&stat, 0, sizeof (struct ls_rjt));
1008
1009         /* For a PLOGI, we only accept if our portname is less
1010          * than the remote portname.
1011          */
1012         phba->fc_stat.elsLogiCol++;
1013         port_cmp = memcmp(&vport->fc_portname, &sp->portName,
1014                           sizeof(struct lpfc_name));
1015
1016         if (port_cmp >= 0) {
1017                 /* Reject this request because the remote node will accept
1018                    ours */
1019                 stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
1020                 stat.un.b.lsRjtRsnCodeExp = LSEXP_CMD_IN_PROGRESS;
1021                 lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp,
1022                         NULL);
1023         } else {
1024                 if (lpfc_rcv_plogi(vport, ndlp, cmdiocb) &&
1025                     (ndlp->nlp_flag & NLP_NPR_2B_DISC) &&
1026                     (vport->num_disc_nodes)) {
1027                         spin_lock_irq(shost->host_lock);
1028                         ndlp->nlp_flag &= ~NLP_NPR_2B_DISC;
1029                         spin_unlock_irq(shost->host_lock);
1030                         /* Check if there are more PLOGIs to be sent */
1031                         lpfc_more_plogi(vport);
1032                         if (vport->num_disc_nodes == 0) {
1033                                 spin_lock_irq(shost->host_lock);
1034                                 vport->fc_flag &= ~FC_NDISC_ACTIVE;
1035                                 spin_unlock_irq(shost->host_lock);
1036                                 lpfc_can_disctmo(vport);
1037                                 lpfc_end_rscn(vport);
1038                         }
1039                 }
1040         } /* If our portname was less */
1041
1042         return ndlp->nlp_state;
1043 }
1044
1045 static uint32_t
1046 lpfc_rcv_prli_plogi_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1047                           void *arg, uint32_t evt)
1048 {
1049         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1050         struct ls_rjt     stat;
1051
1052         memset(&stat, 0, sizeof (struct ls_rjt));
1053         stat.un.b.lsRjtRsnCode = LSRJT_LOGICAL_BSY;
1054         stat.un.b.lsRjtRsnCodeExp = LSEXP_NOTHING_MORE;
1055         lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
1056         return ndlp->nlp_state;
1057 }
1058
1059 static uint32_t
1060 lpfc_rcv_logo_plogi_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1061                           void *arg, uint32_t evt)
1062 {
1063         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1064
1065         /* Retrieve RPI from LOGO IOCB. RPI is used for CMD_ABORT_XRI_CN */
1066         if (vport->phba->sli_rev == LPFC_SLI_REV3)
1067                 ndlp->nlp_rpi = cmdiocb->iocb.ulpIoTag;
1068                                 /* software abort outstanding PLOGI */
1069         lpfc_els_abort(vport->phba, ndlp);
1070
1071         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_LOGO);
1072         return ndlp->nlp_state;
1073 }
1074
1075 static uint32_t
1076 lpfc_rcv_els_plogi_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1077                          void *arg, uint32_t evt)
1078 {
1079         struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
1080         struct lpfc_hba   *phba = vport->phba;
1081         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1082
1083         /* software abort outstanding PLOGI */
1084         lpfc_els_abort(phba, ndlp);
1085
1086         if (evt == NLP_EVT_RCV_LOGO) {
1087                 lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
1088         } else {
1089                 lpfc_issue_els_logo(vport, ndlp, 0);
1090         }
1091
1092         /* Put ndlp in npr state set plogi timer for 1 sec */
1093         mod_timer(&ndlp->nlp_delayfunc, jiffies + msecs_to_jiffies(1000 * 1));
1094         spin_lock_irq(shost->host_lock);
1095         ndlp->nlp_flag |= NLP_DELAY_TMO;
1096         spin_unlock_irq(shost->host_lock);
1097         ndlp->nlp_last_elscmd = ELS_CMD_PLOGI;
1098         ndlp->nlp_prev_state = NLP_STE_PLOGI_ISSUE;
1099         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1100
1101         return ndlp->nlp_state;
1102 }
1103
1104 static uint32_t
1105 lpfc_cmpl_plogi_plogi_issue(struct lpfc_vport *vport,
1106                             struct lpfc_nodelist *ndlp,
1107                             void *arg,
1108                             uint32_t evt)
1109 {
1110         struct lpfc_hba    *phba = vport->phba;
1111         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1112         struct lpfc_iocbq  *cmdiocb, *rspiocb;
1113         struct lpfc_dmabuf *pcmd, *prsp, *mp;
1114         uint32_t *lp;
1115         uint32_t vid, flag;
1116         IOCB_t *irsp;
1117         struct serv_parm *sp;
1118         uint32_t ed_tov;
1119         LPFC_MBOXQ_t *mbox;
1120         int rc;
1121
1122         cmdiocb = (struct lpfc_iocbq *) arg;
1123         rspiocb = cmdiocb->context_un.rsp_iocb;
1124
1125         if (ndlp->nlp_flag & NLP_ACC_REGLOGIN) {
1126                 /* Recovery from PLOGI collision logic */
1127                 return ndlp->nlp_state;
1128         }
1129
1130         irsp = &rspiocb->iocb;
1131
1132         if (irsp->ulpStatus)
1133                 goto out;
1134
1135         pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
1136
1137         prsp = list_get_first(&pcmd->list, struct lpfc_dmabuf, list);
1138         if (!prsp)
1139                 goto out;
1140
1141         lp = (uint32_t *) prsp->virt;
1142         sp = (struct serv_parm *) ((uint8_t *) lp + sizeof (uint32_t));
1143
1144         /* Some switches have FDMI servers returning 0 for WWN */
1145         if ((ndlp->nlp_DID != FDMI_DID) &&
1146                 (wwn_to_u64(sp->portName.u.wwn) == 0 ||
1147                 wwn_to_u64(sp->nodeName.u.wwn) == 0)) {
1148                 lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
1149                                  "0142 PLOGI RSP: Invalid WWN.\n");
1150                 goto out;
1151         }
1152         if (!lpfc_check_sparm(vport, ndlp, sp, CLASS3, 0))
1153                 goto out;
1154         /* PLOGI chkparm OK */
1155         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
1156                          "0121 PLOGI chkparm OK Data: x%x x%x x%x x%x\n",
1157                          ndlp->nlp_DID, ndlp->nlp_state,
1158                          ndlp->nlp_flag, ndlp->nlp_rpi);
1159         if (vport->cfg_fcp_class == 2 && (sp->cls2.classValid))
1160                 ndlp->nlp_fcp_info |= CLASS2;
1161         else
1162                 ndlp->nlp_fcp_info |= CLASS3;
1163
1164         ndlp->nlp_class_sup = 0;
1165         if (sp->cls1.classValid)
1166                 ndlp->nlp_class_sup |= FC_COS_CLASS1;
1167         if (sp->cls2.classValid)
1168                 ndlp->nlp_class_sup |= FC_COS_CLASS2;
1169         if (sp->cls3.classValid)
1170                 ndlp->nlp_class_sup |= FC_COS_CLASS3;
1171         if (sp->cls4.classValid)
1172                 ndlp->nlp_class_sup |= FC_COS_CLASS4;
1173         ndlp->nlp_maxframe =
1174                 ((sp->cmn.bbRcvSizeMsb & 0x0F) << 8) | sp->cmn.bbRcvSizeLsb;
1175
1176         if ((vport->fc_flag & FC_PT2PT) &&
1177             (vport->fc_flag & FC_PT2PT_PLOGI)) {
1178                 ed_tov = be32_to_cpu(sp->cmn.e_d_tov);
1179                 if (sp->cmn.edtovResolution) {
1180                         /* E_D_TOV ticks are in nanoseconds */
1181                         ed_tov = (phba->fc_edtov + 999999) / 1000000;
1182                 }
1183
1184                 ndlp->nlp_flag &= ~NLP_SUPPRESS_RSP;
1185                 if ((phba->sli.sli_flag & LPFC_SLI_SUPPRESS_RSP) &&
1186                     sp->cmn.valid_vendor_ver_level) {
1187                         vid = be32_to_cpu(sp->un.vv.vid);
1188                         flag = be32_to_cpu(sp->un.vv.flags);
1189                         if ((vid == LPFC_VV_EMLX_ID) &&
1190                             (flag & LPFC_VV_SUPPRESS_RSP))
1191                                 ndlp->nlp_flag |= NLP_SUPPRESS_RSP;
1192                 }
1193
1194                 /*
1195                  * Use the larger EDTOV
1196                  * RATOV = 2 * EDTOV for pt-to-pt
1197                  */
1198                 if (ed_tov > phba->fc_edtov)
1199                         phba->fc_edtov = ed_tov;
1200                 phba->fc_ratov = (2 * phba->fc_edtov) / 1000;
1201
1202                 memcpy(&phba->fc_fabparam, sp, sizeof(struct serv_parm));
1203
1204                 /* Issue config_link / reg_vfi to account for updated TOV's */
1205                 if (phba->sli_rev == LPFC_SLI_REV4) {
1206                         lpfc_issue_reg_vfi(vport);
1207                 } else {
1208                         mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
1209                         if (!mbox) {
1210                                 lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
1211                                                  "0133 PLOGI: no memory "
1212                                                  "for config_link "
1213                                                  "Data: x%x x%x x%x x%x\n",
1214                                                  ndlp->nlp_DID, ndlp->nlp_state,
1215                                                  ndlp->nlp_flag, ndlp->nlp_rpi);
1216                                 goto out;
1217                         }
1218
1219                         lpfc_config_link(phba, mbox);
1220
1221                         mbox->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
1222                         mbox->vport = vport;
1223                         rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
1224                         if (rc == MBX_NOT_FINISHED) {
1225                                 mempool_free(mbox, phba->mbox_mem_pool);
1226                                 goto out;
1227                         }
1228                 }
1229         }
1230
1231         lpfc_unreg_rpi(vport, ndlp);
1232
1233         mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
1234         if (!mbox) {
1235                 lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
1236                                  "0018 PLOGI: no memory for reg_login "
1237                                  "Data: x%x x%x x%x x%x\n",
1238                                  ndlp->nlp_DID, ndlp->nlp_state,
1239                                  ndlp->nlp_flag, ndlp->nlp_rpi);
1240                 goto out;
1241         }
1242
1243         if (lpfc_reg_rpi(phba, vport->vpi, irsp->un.elsreq64.remoteID,
1244                          (uint8_t *) sp, mbox, ndlp->nlp_rpi) == 0) {
1245                 switch (ndlp->nlp_DID) {
1246                 case NameServer_DID:
1247                         mbox->mbox_cmpl = lpfc_mbx_cmpl_ns_reg_login;
1248                         break;
1249                 case FDMI_DID:
1250                         mbox->mbox_cmpl = lpfc_mbx_cmpl_fdmi_reg_login;
1251                         break;
1252                 default:
1253                         ndlp->nlp_flag |= NLP_REG_LOGIN_SEND;
1254                         mbox->mbox_cmpl = lpfc_mbx_cmpl_reg_login;
1255                 }
1256                 mbox->context2 = lpfc_nlp_get(ndlp);
1257                 mbox->vport = vport;
1258                 if (lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT)
1259                     != MBX_NOT_FINISHED) {
1260                         lpfc_nlp_set_state(vport, ndlp,
1261                                            NLP_STE_REG_LOGIN_ISSUE);
1262                         return ndlp->nlp_state;
1263                 }
1264                 if (ndlp->nlp_flag & NLP_REG_LOGIN_SEND)
1265                         ndlp->nlp_flag &= ~NLP_REG_LOGIN_SEND;
1266                 /* decrement node reference count to the failed mbox
1267                  * command
1268                  */
1269                 lpfc_nlp_put(ndlp);
1270                 mp = (struct lpfc_dmabuf *) mbox->context1;
1271                 lpfc_mbuf_free(phba, mp->virt, mp->phys);
1272                 kfree(mp);
1273                 mempool_free(mbox, phba->mbox_mem_pool);
1274
1275                 lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
1276                                  "0134 PLOGI: cannot issue reg_login "
1277                                  "Data: x%x x%x x%x x%x\n",
1278                                  ndlp->nlp_DID, ndlp->nlp_state,
1279                                  ndlp->nlp_flag, ndlp->nlp_rpi);
1280         } else {
1281                 mempool_free(mbox, phba->mbox_mem_pool);
1282
1283                 lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
1284                                  "0135 PLOGI: cannot format reg_login "
1285                                  "Data: x%x x%x x%x x%x\n",
1286                                  ndlp->nlp_DID, ndlp->nlp_state,
1287                                  ndlp->nlp_flag, ndlp->nlp_rpi);
1288         }
1289
1290
1291 out:
1292         if (ndlp->nlp_DID == NameServer_DID) {
1293                 lpfc_vport_set_state(vport, FC_VPORT_FAILED);
1294                 lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
1295                                  "0261 Cannot Register NameServer login\n");
1296         }
1297
1298         /*
1299         ** In case the node reference counter does not go to zero, ensure that
1300         ** the stale state for the node is not processed.
1301         */
1302
1303         ndlp->nlp_prev_state = ndlp->nlp_state;
1304         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1305         spin_lock_irq(shost->host_lock);
1306         ndlp->nlp_flag |= NLP_DEFER_RM;
1307         spin_unlock_irq(shost->host_lock);
1308         return NLP_STE_FREED_NODE;
1309 }
1310
1311 static uint32_t
1312 lpfc_cmpl_logo_plogi_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1313                            void *arg, uint32_t evt)
1314 {
1315         return ndlp->nlp_state;
1316 }
1317
1318 static uint32_t
1319 lpfc_cmpl_reglogin_plogi_issue(struct lpfc_vport *vport,
1320         struct lpfc_nodelist *ndlp, void *arg, uint32_t evt)
1321 {
1322         struct lpfc_hba *phba;
1323         LPFC_MBOXQ_t *pmb = (LPFC_MBOXQ_t *) arg;
1324         MAILBOX_t *mb = &pmb->u.mb;
1325         uint16_t rpi;
1326
1327         phba = vport->phba;
1328         /* Release the RPI */
1329         if (!(phba->pport->load_flag & FC_UNLOADING) &&
1330                 !mb->mbxStatus) {
1331                 rpi = pmb->u.mb.un.varWords[0];
1332                 lpfc_release_rpi(phba, vport, rpi);
1333         }
1334         return ndlp->nlp_state;
1335 }
1336
1337 static uint32_t
1338 lpfc_device_rm_plogi_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1339                            void *arg, uint32_t evt)
1340 {
1341         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1342
1343         if (ndlp->nlp_flag & NLP_NPR_2B_DISC) {
1344                 spin_lock_irq(shost->host_lock);
1345                 ndlp->nlp_flag |= NLP_NODEV_REMOVE;
1346                 spin_unlock_irq(shost->host_lock);
1347                 return ndlp->nlp_state;
1348         } else {
1349                 /* software abort outstanding PLOGI */
1350                 lpfc_els_abort(vport->phba, ndlp);
1351
1352                 lpfc_drop_node(vport, ndlp);
1353                 return NLP_STE_FREED_NODE;
1354         }
1355 }
1356
1357 static uint32_t
1358 lpfc_device_recov_plogi_issue(struct lpfc_vport *vport,
1359                               struct lpfc_nodelist *ndlp,
1360                               void *arg,
1361                               uint32_t evt)
1362 {
1363         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1364         struct lpfc_hba  *phba = vport->phba;
1365
1366         /* Don't do anything that will mess up processing of the
1367          * previous RSCN.
1368          */
1369         if (vport->fc_flag & FC_RSCN_DEFERRED)
1370                 return ndlp->nlp_state;
1371
1372         /* software abort outstanding PLOGI */
1373         lpfc_els_abort(phba, ndlp);
1374
1375         ndlp->nlp_prev_state = NLP_STE_PLOGI_ISSUE;
1376         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1377         spin_lock_irq(shost->host_lock);
1378         ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
1379         spin_unlock_irq(shost->host_lock);
1380
1381         return ndlp->nlp_state;
1382 }
1383
1384 static uint32_t
1385 lpfc_rcv_plogi_adisc_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1386                            void *arg, uint32_t evt)
1387 {
1388         struct Scsi_Host   *shost = lpfc_shost_from_vport(vport);
1389         struct lpfc_hba   *phba = vport->phba;
1390         struct lpfc_iocbq *cmdiocb;
1391
1392         /* software abort outstanding ADISC */
1393         lpfc_els_abort(phba, ndlp);
1394
1395         cmdiocb = (struct lpfc_iocbq *) arg;
1396
1397         if (lpfc_rcv_plogi(vport, ndlp, cmdiocb)) {
1398                 if (ndlp->nlp_flag & NLP_NPR_2B_DISC) {
1399                         spin_lock_irq(shost->host_lock);
1400                         ndlp->nlp_flag &= ~NLP_NPR_2B_DISC;
1401                         spin_unlock_irq(shost->host_lock);
1402                         if (vport->num_disc_nodes)
1403                                 lpfc_more_adisc(vport);
1404                 }
1405                 return ndlp->nlp_state;
1406         }
1407         ndlp->nlp_prev_state = NLP_STE_ADISC_ISSUE;
1408         lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0);
1409         lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
1410
1411         return ndlp->nlp_state;
1412 }
1413
1414 static uint32_t
1415 lpfc_rcv_prli_adisc_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1416                           void *arg, uint32_t evt)
1417 {
1418         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1419
1420         if (lpfc_rcv_prli_support_check(vport, ndlp, cmdiocb))
1421                 lpfc_els_rsp_prli_acc(vport, cmdiocb, ndlp);
1422         return ndlp->nlp_state;
1423 }
1424
1425 static uint32_t
1426 lpfc_rcv_logo_adisc_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1427                           void *arg, uint32_t evt)
1428 {
1429         struct lpfc_hba *phba = vport->phba;
1430         struct lpfc_iocbq *cmdiocb;
1431
1432         cmdiocb = (struct lpfc_iocbq *) arg;
1433
1434         /* software abort outstanding ADISC */
1435         lpfc_els_abort(phba, ndlp);
1436
1437         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_LOGO);
1438         return ndlp->nlp_state;
1439 }
1440
1441 static uint32_t
1442 lpfc_rcv_padisc_adisc_issue(struct lpfc_vport *vport,
1443                             struct lpfc_nodelist *ndlp,
1444                             void *arg, uint32_t evt)
1445 {
1446         struct lpfc_iocbq *cmdiocb;
1447
1448         cmdiocb = (struct lpfc_iocbq *) arg;
1449
1450         lpfc_rcv_padisc(vport, ndlp, cmdiocb);
1451         return ndlp->nlp_state;
1452 }
1453
1454 static uint32_t
1455 lpfc_rcv_prlo_adisc_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1456                           void *arg, uint32_t evt)
1457 {
1458         struct lpfc_iocbq *cmdiocb;
1459
1460         cmdiocb = (struct lpfc_iocbq *) arg;
1461
1462         /* Treat like rcv logo */
1463         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_PRLO);
1464         return ndlp->nlp_state;
1465 }
1466
1467 static uint32_t
1468 lpfc_cmpl_adisc_adisc_issue(struct lpfc_vport *vport,
1469                             struct lpfc_nodelist *ndlp,
1470                             void *arg, uint32_t evt)
1471 {
1472         struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
1473         struct lpfc_hba   *phba = vport->phba;
1474         struct lpfc_iocbq *cmdiocb, *rspiocb;
1475         IOCB_t *irsp;
1476         ADISC *ap;
1477         int rc;
1478
1479         cmdiocb = (struct lpfc_iocbq *) arg;
1480         rspiocb = cmdiocb->context_un.rsp_iocb;
1481
1482         ap = (ADISC *)lpfc_check_elscmpl_iocb(phba, cmdiocb, rspiocb);
1483         irsp = &rspiocb->iocb;
1484
1485         if ((irsp->ulpStatus) ||
1486             (!lpfc_check_adisc(vport, ndlp, &ap->nodeName, &ap->portName))) {
1487                 /* 1 sec timeout */
1488                 mod_timer(&ndlp->nlp_delayfunc,
1489                           jiffies + msecs_to_jiffies(1000));
1490                 spin_lock_irq(shost->host_lock);
1491                 ndlp->nlp_flag |= NLP_DELAY_TMO;
1492                 spin_unlock_irq(shost->host_lock);
1493                 ndlp->nlp_last_elscmd = ELS_CMD_PLOGI;
1494
1495                 memset(&ndlp->nlp_nodename, 0, sizeof(struct lpfc_name));
1496                 memset(&ndlp->nlp_portname, 0, sizeof(struct lpfc_name));
1497
1498                 ndlp->nlp_prev_state = NLP_STE_ADISC_ISSUE;
1499                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1500                 lpfc_unreg_rpi(vport, ndlp);
1501                 return ndlp->nlp_state;
1502         }
1503
1504         if (phba->sli_rev == LPFC_SLI_REV4) {
1505                 rc = lpfc_sli4_resume_rpi(ndlp, NULL, NULL);
1506                 if (rc) {
1507                         /* Stay in state and retry. */
1508                         ndlp->nlp_prev_state = NLP_STE_ADISC_ISSUE;
1509                         return ndlp->nlp_state;
1510                 }
1511         }
1512
1513         if (ndlp->nlp_type & NLP_FCP_TARGET) {
1514                 ndlp->nlp_prev_state = NLP_STE_ADISC_ISSUE;
1515                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_MAPPED_NODE);
1516         } else {
1517                 ndlp->nlp_prev_state = NLP_STE_ADISC_ISSUE;
1518                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
1519         }
1520
1521         return ndlp->nlp_state;
1522 }
1523
1524 static uint32_t
1525 lpfc_device_rm_adisc_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1526                            void *arg, uint32_t evt)
1527 {
1528         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1529
1530         if (ndlp->nlp_flag & NLP_NPR_2B_DISC) {
1531                 spin_lock_irq(shost->host_lock);
1532                 ndlp->nlp_flag |= NLP_NODEV_REMOVE;
1533                 spin_unlock_irq(shost->host_lock);
1534                 return ndlp->nlp_state;
1535         } else {
1536                 /* software abort outstanding ADISC */
1537                 lpfc_els_abort(vport->phba, ndlp);
1538
1539                 lpfc_drop_node(vport, ndlp);
1540                 return NLP_STE_FREED_NODE;
1541         }
1542 }
1543
1544 static uint32_t
1545 lpfc_device_recov_adisc_issue(struct lpfc_vport *vport,
1546                               struct lpfc_nodelist *ndlp,
1547                               void *arg,
1548                               uint32_t evt)
1549 {
1550         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1551         struct lpfc_hba  *phba = vport->phba;
1552
1553         /* Don't do anything that will mess up processing of the
1554          * previous RSCN.
1555          */
1556         if (vport->fc_flag & FC_RSCN_DEFERRED)
1557                 return ndlp->nlp_state;
1558
1559         /* software abort outstanding ADISC */
1560         lpfc_els_abort(phba, ndlp);
1561
1562         ndlp->nlp_prev_state = NLP_STE_ADISC_ISSUE;
1563         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1564         spin_lock_irq(shost->host_lock);
1565         ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
1566         spin_unlock_irq(shost->host_lock);
1567         lpfc_disc_set_adisc(vport, ndlp);
1568         return ndlp->nlp_state;
1569 }
1570
1571 static uint32_t
1572 lpfc_rcv_plogi_reglogin_issue(struct lpfc_vport *vport,
1573                               struct lpfc_nodelist *ndlp,
1574                               void *arg,
1575                               uint32_t evt)
1576 {
1577         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1578
1579         lpfc_rcv_plogi(vport, ndlp, cmdiocb);
1580         return ndlp->nlp_state;
1581 }
1582
1583 static uint32_t
1584 lpfc_rcv_prli_reglogin_issue(struct lpfc_vport *vport,
1585                              struct lpfc_nodelist *ndlp,
1586                              void *arg,
1587                              uint32_t evt)
1588 {
1589         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1590         struct ls_rjt     stat;
1591
1592         if (!lpfc_rcv_prli_support_check(vport, ndlp, cmdiocb)) {
1593                 return ndlp->nlp_state;
1594         }
1595         if (vport->phba->nvmet_support) {
1596                 /* NVME Target mode.  Handle and respond to the PRLI and
1597                  * transition to UNMAPPED provided the RPI has completed
1598                  * registration.
1599                  */
1600                 if (ndlp->nlp_flag & NLP_RPI_REGISTERED) {
1601                         lpfc_rcv_prli(vport, ndlp, cmdiocb);
1602                         lpfc_els_rsp_prli_acc(vport, cmdiocb, ndlp);
1603                 } else {
1604                         /* RPI registration has not completed. Reject the PRLI
1605                          * to prevent an illegal state transition when the
1606                          * rpi registration does complete.
1607                          */
1608                         memset(&stat, 0, sizeof(struct ls_rjt));
1609                         stat.un.b.lsRjtRsnCode = LSRJT_LOGICAL_BSY;
1610                         stat.un.b.lsRjtRsnCodeExp = LSEXP_NOTHING_MORE;
1611                         lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb,
1612                                             ndlp, NULL);
1613                         return ndlp->nlp_state;
1614                 }
1615         } else {
1616                 /* Initiator mode. */
1617                 lpfc_els_rsp_prli_acc(vport, cmdiocb, ndlp);
1618         }
1619         return ndlp->nlp_state;
1620 }
1621
1622 static uint32_t
1623 lpfc_rcv_logo_reglogin_issue(struct lpfc_vport *vport,
1624                              struct lpfc_nodelist *ndlp,
1625                              void *arg,
1626                              uint32_t evt)
1627 {
1628         struct lpfc_hba   *phba = vport->phba;
1629         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1630         LPFC_MBOXQ_t      *mb;
1631         LPFC_MBOXQ_t      *nextmb;
1632         struct lpfc_dmabuf *mp;
1633
1634         cmdiocb = (struct lpfc_iocbq *) arg;
1635
1636         /* cleanup any ndlp on mbox q waiting for reglogin cmpl */
1637         if ((mb = phba->sli.mbox_active)) {
1638                 if ((mb->u.mb.mbxCommand == MBX_REG_LOGIN64) &&
1639                    (ndlp == (struct lpfc_nodelist *) mb->context2)) {
1640                         ndlp->nlp_flag &= ~NLP_REG_LOGIN_SEND;
1641                         lpfc_nlp_put(ndlp);
1642                         mb->context2 = NULL;
1643                         mb->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
1644                 }
1645         }
1646
1647         spin_lock_irq(&phba->hbalock);
1648         list_for_each_entry_safe(mb, nextmb, &phba->sli.mboxq, list) {
1649                 if ((mb->u.mb.mbxCommand == MBX_REG_LOGIN64) &&
1650                    (ndlp == (struct lpfc_nodelist *) mb->context2)) {
1651                         mp = (struct lpfc_dmabuf *) (mb->context1);
1652                         if (mp) {
1653                                 __lpfc_mbuf_free(phba, mp->virt, mp->phys);
1654                                 kfree(mp);
1655                         }
1656                         ndlp->nlp_flag &= ~NLP_REG_LOGIN_SEND;
1657                         lpfc_nlp_put(ndlp);
1658                         list_del(&mb->list);
1659                         phba->sli.mboxq_cnt--;
1660                         mempool_free(mb, phba->mbox_mem_pool);
1661                 }
1662         }
1663         spin_unlock_irq(&phba->hbalock);
1664
1665         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_LOGO);
1666         return ndlp->nlp_state;
1667 }
1668
1669 static uint32_t
1670 lpfc_rcv_padisc_reglogin_issue(struct lpfc_vport *vport,
1671                                struct lpfc_nodelist *ndlp,
1672                                void *arg,
1673                                uint32_t evt)
1674 {
1675         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1676
1677         lpfc_rcv_padisc(vport, ndlp, cmdiocb);
1678         return ndlp->nlp_state;
1679 }
1680
1681 static uint32_t
1682 lpfc_rcv_prlo_reglogin_issue(struct lpfc_vport *vport,
1683                              struct lpfc_nodelist *ndlp,
1684                              void *arg,
1685                              uint32_t evt)
1686 {
1687         struct lpfc_iocbq *cmdiocb;
1688
1689         cmdiocb = (struct lpfc_iocbq *) arg;
1690         lpfc_els_rsp_acc(vport, ELS_CMD_PRLO, cmdiocb, ndlp, NULL);
1691         return ndlp->nlp_state;
1692 }
1693
1694 static uint32_t
1695 lpfc_cmpl_reglogin_reglogin_issue(struct lpfc_vport *vport,
1696                                   struct lpfc_nodelist *ndlp,
1697                                   void *arg,
1698                                   uint32_t evt)
1699 {
1700         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1701         struct lpfc_hba *phba = vport->phba;
1702         LPFC_MBOXQ_t *pmb = (LPFC_MBOXQ_t *) arg;
1703         MAILBOX_t *mb = &pmb->u.mb;
1704         uint32_t did  = mb->un.varWords[1];
1705         int rc = 0;
1706
1707         if (mb->mbxStatus) {
1708                 /* RegLogin failed */
1709                 lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
1710                                 "0246 RegLogin failed Data: x%x x%x x%x x%x "
1711                                  "x%x\n",
1712                                  did, mb->mbxStatus, vport->port_state,
1713                                  mb->un.varRegLogin.vpi,
1714                                  mb->un.varRegLogin.rpi);
1715                 /*
1716                  * If RegLogin failed due to lack of HBA resources do not
1717                  * retry discovery.
1718                  */
1719                 if (mb->mbxStatus == MBXERR_RPI_FULL) {
1720                         ndlp->nlp_prev_state = NLP_STE_REG_LOGIN_ISSUE;
1721                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1722                         return ndlp->nlp_state;
1723                 }
1724
1725                 /* Put ndlp in npr state set plogi timer for 1 sec */
1726                 mod_timer(&ndlp->nlp_delayfunc,
1727                           jiffies + msecs_to_jiffies(1000 * 1));
1728                 spin_lock_irq(shost->host_lock);
1729                 ndlp->nlp_flag |= NLP_DELAY_TMO;
1730                 spin_unlock_irq(shost->host_lock);
1731                 ndlp->nlp_last_elscmd = ELS_CMD_PLOGI;
1732
1733                 lpfc_issue_els_logo(vport, ndlp, 0);
1734                 ndlp->nlp_prev_state = NLP_STE_REG_LOGIN_ISSUE;
1735                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1736                 return ndlp->nlp_state;
1737         }
1738
1739         /* SLI4 ports have preallocated logical rpis. */
1740         if (phba->sli_rev < LPFC_SLI_REV4)
1741                 ndlp->nlp_rpi = mb->un.varWords[0];
1742
1743         ndlp->nlp_flag |= NLP_RPI_REGISTERED;
1744
1745         /* Only if we are not a fabric nport do we issue PRLI */
1746         lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
1747                          "3066 RegLogin Complete on x%x x%x x%x\n",
1748                          did, ndlp->nlp_type, ndlp->nlp_fc4_type);
1749         if (!(ndlp->nlp_type & NLP_FABRIC) &&
1750             (phba->nvmet_support == 0)) {
1751                 /* The driver supports FCP and NVME concurrently.  If the
1752                  * ndlp's nlp_fc4_type is still zero, the driver doesn't
1753                  * know what PRLI to send yet.  Figure that out now and
1754                  * call PRLI depending on the outcome.
1755                  */
1756                 if (vport->fc_flag & FC_PT2PT) {
1757                         /* If we are pt2pt, there is no Fabric to determine
1758                          * the FC4 type of the remote nport. So if NVME
1759                          * is configured try it.
1760                          */
1761                         ndlp->nlp_fc4_type |= NLP_FC4_FCP;
1762                         if ((phba->cfg_enable_fc4_type == LPFC_ENABLE_BOTH) ||
1763                              (phba->cfg_enable_fc4_type == LPFC_ENABLE_NVME)) {
1764                                 ndlp->nlp_fc4_type |= NLP_FC4_NVME;
1765                                 /* We need to update the localport also */
1766                                 lpfc_nvme_update_localport(vport);
1767                         }
1768
1769                 } else if (phba->fc_topology == LPFC_TOPOLOGY_LOOP) {
1770                         ndlp->nlp_fc4_type |= NLP_FC4_FCP;
1771
1772                 } else if (ndlp->nlp_fc4_type == 0) {
1773                         rc = lpfc_ns_cmd(vport, SLI_CTNS_GFT_ID,
1774                                          0, ndlp->nlp_DID);
1775                         return ndlp->nlp_state;
1776                 }
1777
1778                 ndlp->nlp_prev_state = NLP_STE_REG_LOGIN_ISSUE;
1779                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_PRLI_ISSUE);
1780                 lpfc_issue_els_prli(vport, ndlp, 0);
1781         } else {
1782                 if ((vport->fc_flag & FC_PT2PT) && phba->nvmet_support)
1783                         phba->targetport->port_id = vport->fc_myDID;
1784
1785                 /* Only Fabric ports should transition. NVME target
1786                  * must complete PRLI.
1787                  */
1788                 if (ndlp->nlp_type & NLP_FABRIC) {
1789                         ndlp->nlp_prev_state = NLP_STE_REG_LOGIN_ISSUE;
1790                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
1791                 }
1792         }
1793         return ndlp->nlp_state;
1794 }
1795
1796 static uint32_t
1797 lpfc_device_rm_reglogin_issue(struct lpfc_vport *vport,
1798                               struct lpfc_nodelist *ndlp,
1799                               void *arg,
1800                               uint32_t evt)
1801 {
1802         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1803
1804         if (ndlp->nlp_flag & NLP_NPR_2B_DISC) {
1805                 spin_lock_irq(shost->host_lock);
1806                 ndlp->nlp_flag |= NLP_NODEV_REMOVE;
1807                 spin_unlock_irq(shost->host_lock);
1808                 return ndlp->nlp_state;
1809         } else {
1810                 lpfc_drop_node(vport, ndlp);
1811                 return NLP_STE_FREED_NODE;
1812         }
1813 }
1814
1815 static uint32_t
1816 lpfc_device_recov_reglogin_issue(struct lpfc_vport *vport,
1817                                  struct lpfc_nodelist *ndlp,
1818                                  void *arg,
1819                                  uint32_t evt)
1820 {
1821         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1822
1823         /* Don't do anything that will mess up processing of the
1824          * previous RSCN.
1825          */
1826         if (vport->fc_flag & FC_RSCN_DEFERRED)
1827                 return ndlp->nlp_state;
1828
1829         ndlp->nlp_prev_state = NLP_STE_REG_LOGIN_ISSUE;
1830         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1831         spin_lock_irq(shost->host_lock);
1832
1833         /* If we are a target we won't immediately transition into PRLI,
1834          * so if REG_LOGIN already completed we don't need to ignore it.
1835          */
1836         if (!(ndlp->nlp_flag & NLP_RPI_REGISTERED) ||
1837             !vport->phba->nvmet_support)
1838                 ndlp->nlp_flag |= NLP_IGNR_REG_CMPL;
1839
1840         ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
1841         spin_unlock_irq(shost->host_lock);
1842         lpfc_disc_set_adisc(vport, ndlp);
1843         return ndlp->nlp_state;
1844 }
1845
1846 static uint32_t
1847 lpfc_rcv_plogi_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1848                           void *arg, uint32_t evt)
1849 {
1850         struct lpfc_iocbq *cmdiocb;
1851
1852         cmdiocb = (struct lpfc_iocbq *) arg;
1853
1854         lpfc_rcv_plogi(vport, ndlp, cmdiocb);
1855         return ndlp->nlp_state;
1856 }
1857
1858 static uint32_t
1859 lpfc_rcv_prli_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1860                          void *arg, uint32_t evt)
1861 {
1862         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1863
1864         if (!lpfc_rcv_prli_support_check(vport, ndlp, cmdiocb))
1865                 return ndlp->nlp_state;
1866         lpfc_els_rsp_prli_acc(vport, cmdiocb, ndlp);
1867         return ndlp->nlp_state;
1868 }
1869
1870 static uint32_t
1871 lpfc_rcv_logo_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1872                          void *arg, uint32_t evt)
1873 {
1874         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1875
1876         /* Software abort outstanding PRLI before sending acc */
1877         lpfc_els_abort(vport->phba, ndlp);
1878
1879         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_LOGO);
1880         return ndlp->nlp_state;
1881 }
1882
1883 static uint32_t
1884 lpfc_rcv_padisc_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1885                            void *arg, uint32_t evt)
1886 {
1887         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1888
1889         lpfc_rcv_padisc(vport, ndlp, cmdiocb);
1890         return ndlp->nlp_state;
1891 }
1892
1893 /* This routine is envoked when we rcv a PRLO request from a nport
1894  * we are logged into.  We should send back a PRLO rsp setting the
1895  * appropriate bits.
1896  * NEXT STATE = PRLI_ISSUE
1897  */
1898 static uint32_t
1899 lpfc_rcv_prlo_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1900                          void *arg, uint32_t evt)
1901 {
1902         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1903
1904         lpfc_els_rsp_acc(vport, ELS_CMD_PRLO, cmdiocb, ndlp, NULL);
1905         return ndlp->nlp_state;
1906 }
1907
1908 static uint32_t
1909 lpfc_cmpl_prli_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1910                           void *arg, uint32_t evt)
1911 {
1912         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1913         struct lpfc_iocbq *cmdiocb, *rspiocb;
1914         struct lpfc_hba   *phba = vport->phba;
1915         IOCB_t *irsp;
1916         PRLI *npr;
1917         struct lpfc_nvme_prli *nvpr;
1918         void *temp_ptr;
1919
1920         cmdiocb = (struct lpfc_iocbq *) arg;
1921         rspiocb = cmdiocb->context_un.rsp_iocb;
1922
1923         /* A solicited PRLI is either FCP or NVME.  The PRLI cmd/rsp
1924          * format is different so NULL the two PRLI types so that the
1925          * driver correctly gets the correct context.
1926          */
1927         npr = NULL;
1928         nvpr = NULL;
1929         temp_ptr = lpfc_check_elscmpl_iocb(phba, cmdiocb, rspiocb);
1930         if (cmdiocb->iocb_flag & LPFC_PRLI_FCP_REQ)
1931                 npr = (PRLI *) temp_ptr;
1932         else if (cmdiocb->iocb_flag & LPFC_PRLI_NVME_REQ)
1933                 nvpr = (struct lpfc_nvme_prli *) temp_ptr;
1934
1935         irsp = &rspiocb->iocb;
1936         if (irsp->ulpStatus) {
1937                 if ((vport->port_type == LPFC_NPIV_PORT) &&
1938                     vport->cfg_restrict_login) {
1939                         goto out;
1940                 }
1941
1942                 /* Adjust the nlp_type accordingly if the PRLI failed */
1943                 if (npr)
1944                         ndlp->nlp_fc4_type &= ~NLP_FC4_FCP;
1945                 if (nvpr)
1946                         ndlp->nlp_fc4_type &= ~NLP_FC4_NVME;
1947
1948                 /* We can't set the DSM state till BOTH PRLIs complete */
1949                 goto out_err;
1950         }
1951
1952         if (npr && (npr->acceptRspCode == PRLI_REQ_EXECUTED) &&
1953             (npr->prliType == PRLI_FCP_TYPE)) {
1954                 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC,
1955                                  "6028 FCP NPR PRLI Cmpl Init %d Target %d\n",
1956                                  npr->initiatorFunc,
1957                                  npr->targetFunc);
1958                 if (npr->initiatorFunc)
1959                         ndlp->nlp_type |= NLP_FCP_INITIATOR;
1960                 if (npr->targetFunc) {
1961                         ndlp->nlp_type |= NLP_FCP_TARGET;
1962                         if (npr->writeXferRdyDis)
1963                                 ndlp->nlp_flag |= NLP_FIRSTBURST;
1964                 }
1965                 if (npr->Retry)
1966                         ndlp->nlp_fcp_info |= NLP_FCP_2_DEVICE;
1967
1968         } else if (nvpr &&
1969                    (bf_get_be32(prli_acc_rsp_code, nvpr) ==
1970                     PRLI_REQ_EXECUTED) &&
1971                    (bf_get_be32(prli_type_code, nvpr) ==
1972                     PRLI_NVME_TYPE)) {
1973
1974                 /* Complete setting up the remote ndlp personality. */
1975                 if (bf_get_be32(prli_init, nvpr))
1976                         ndlp->nlp_type |= NLP_NVME_INITIATOR;
1977
1978                 /* Target driver cannot solicit NVME FB. */
1979                 if (bf_get_be32(prli_tgt, nvpr)) {
1980                         /* Complete the nvme target roles.  The transport
1981                          * needs to know if the rport is capable of
1982                          * discovery in addition to its role.
1983                          */
1984                         ndlp->nlp_type |= NLP_NVME_TARGET;
1985                         if (bf_get_be32(prli_disc, nvpr))
1986                                 ndlp->nlp_type |= NLP_NVME_DISCOVERY;
1987
1988                         /*
1989                          * If prli_fba is set, the Target supports FirstBurst.
1990                          * If prli_fb_sz is 0, the FirstBurst size is unlimited,
1991                          * otherwise it defines the actual size supported by
1992                          * the NVME Target.
1993                          */
1994                         if ((bf_get_be32(prli_fba, nvpr) == 1) &&
1995                             (phba->cfg_nvme_enable_fb) &&
1996                             (!phba->nvmet_support)) {
1997                                 /* Both sides support FB. The target's first
1998                                  * burst size is a 512 byte encoded value.
1999                                  */
2000                                 ndlp->nlp_flag |= NLP_FIRSTBURST;
2001                                 ndlp->nvme_fb_size = bf_get_be32(prli_fb_sz,
2002                                                                  nvpr);
2003
2004                                 /* Expressed in units of 512 bytes */
2005                                 if (ndlp->nvme_fb_size)
2006                                         ndlp->nvme_fb_size <<=
2007                                                 LPFC_NVME_FB_SHIFT;
2008                                 else
2009                                         ndlp->nvme_fb_size = LPFC_NVME_MAX_FB;
2010                         }
2011                 }
2012
2013                 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC,
2014                                  "6029 NVME PRLI Cmpl w1 x%08x "
2015                                  "w4 x%08x w5 x%08x flag x%x, "
2016                                  "fcp_info x%x nlp_type x%x\n",
2017                                  be32_to_cpu(nvpr->word1),
2018                                  be32_to_cpu(nvpr->word4),
2019                                  be32_to_cpu(nvpr->word5),
2020                                  ndlp->nlp_flag, ndlp->nlp_fcp_info,
2021                                  ndlp->nlp_type);
2022         }
2023         if (!(ndlp->nlp_type & NLP_FCP_TARGET) &&
2024             (vport->port_type == LPFC_NPIV_PORT) &&
2025              vport->cfg_restrict_login) {
2026 out:
2027                 spin_lock_irq(shost->host_lock);
2028                 ndlp->nlp_flag |= NLP_TARGET_REMOVE;
2029                 spin_unlock_irq(shost->host_lock);
2030                 lpfc_issue_els_logo(vport, ndlp, 0);
2031
2032                 ndlp->nlp_prev_state = NLP_STE_PRLI_ISSUE;
2033                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
2034                 return ndlp->nlp_state;
2035         }
2036
2037 out_err:
2038         /* The ndlp state cannot move to MAPPED or UNMAPPED before all PRLIs
2039          * are complete.
2040          */
2041         if (ndlp->fc4_prli_sent == 0) {
2042                 ndlp->nlp_prev_state = NLP_STE_PRLI_ISSUE;
2043                 if (ndlp->nlp_type & (NLP_FCP_TARGET | NLP_NVME_TARGET))
2044                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_MAPPED_NODE);
2045                 else if (ndlp->nlp_type &
2046                          (NLP_FCP_INITIATOR | NLP_NVME_INITIATOR))
2047                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
2048         } else
2049                 lpfc_printf_vlog(vport,
2050                                  KERN_INFO, LOG_ELS,
2051                                  "3067 PRLI's still outstanding "
2052                                  "on x%06x - count %d, Pend Node Mode "
2053                                  "transition...\n",
2054                                  ndlp->nlp_DID, ndlp->fc4_prli_sent);
2055
2056         return ndlp->nlp_state;
2057 }
2058
2059 /*! lpfc_device_rm_prli_issue
2060  *
2061  * \pre
2062  * \post
2063  * \param   phba
2064  * \param   ndlp
2065  * \param   arg
2066  * \param   evt
2067  * \return  uint32_t
2068  *
2069  * \b Description:
2070  *    This routine is envoked when we a request to remove a nport we are in the
2071  *    process of PRLIing. We should software abort outstanding prli, unreg
2072  *    login, send a logout. We will change node state to UNUSED_NODE, put it
2073  *    on plogi list so it can be freed when LOGO completes.
2074  *
2075  */
2076
2077 static uint32_t
2078 lpfc_device_rm_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
2079                           void *arg, uint32_t evt)
2080 {
2081         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
2082
2083         if (ndlp->nlp_flag & NLP_NPR_2B_DISC) {
2084                 spin_lock_irq(shost->host_lock);
2085                 ndlp->nlp_flag |= NLP_NODEV_REMOVE;
2086                 spin_unlock_irq(shost->host_lock);
2087                 return ndlp->nlp_state;
2088         } else {
2089                 /* software abort outstanding PLOGI */
2090                 lpfc_els_abort(vport->phba, ndlp);
2091
2092                 lpfc_drop_node(vport, ndlp);
2093                 return NLP_STE_FREED_NODE;
2094         }
2095 }
2096
2097
2098 /*! lpfc_device_recov_prli_issue
2099  *
2100  * \pre
2101  * \post
2102  * \param   phba
2103  * \param   ndlp
2104  * \param   arg
2105  * \param   evt
2106  * \return  uint32_t
2107  *
2108  * \b Description:
2109  *    The routine is envoked when the state of a device is unknown, like
2110  *    during a link down. We should remove the nodelist entry from the
2111  *    unmapped list, issue a UNREG_LOGIN, do a software abort of the
2112  *    outstanding PRLI command, then free the node entry.
2113  */
2114 static uint32_t
2115 lpfc_device_recov_prli_issue(struct lpfc_vport *vport,
2116                              struct lpfc_nodelist *ndlp,
2117                              void *arg,
2118                              uint32_t evt)
2119 {
2120         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
2121         struct lpfc_hba  *phba = vport->phba;
2122
2123         /* Don't do anything that will mess up processing of the
2124          * previous RSCN.
2125          */
2126         if (vport->fc_flag & FC_RSCN_DEFERRED)
2127                 return ndlp->nlp_state;
2128
2129         /* software abort outstanding PRLI */
2130         lpfc_els_abort(phba, ndlp);
2131
2132         ndlp->nlp_prev_state = NLP_STE_PRLI_ISSUE;
2133         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
2134         spin_lock_irq(shost->host_lock);
2135         ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
2136         spin_unlock_irq(shost->host_lock);
2137         lpfc_disc_set_adisc(vport, ndlp);
2138         return ndlp->nlp_state;
2139 }
2140
2141 static uint32_t
2142 lpfc_rcv_plogi_logo_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
2143                           void *arg, uint32_t evt)
2144 {
2145         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *)arg;
2146         struct ls_rjt     stat;
2147
2148         memset(&stat, 0, sizeof(struct ls_rjt));
2149         stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
2150         stat.un.b.lsRjtRsnCodeExp = LSEXP_NOTHING_MORE;
2151         lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
2152         return ndlp->nlp_state;
2153 }
2154
2155 static uint32_t
2156 lpfc_rcv_prli_logo_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
2157                          void *arg, uint32_t evt)
2158 {
2159         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *)arg;
2160         struct ls_rjt     stat;
2161
2162         memset(&stat, 0, sizeof(struct ls_rjt));
2163         stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
2164         stat.un.b.lsRjtRsnCodeExp = LSEXP_NOTHING_MORE;
2165         lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
2166         return ndlp->nlp_state;
2167 }
2168
2169 static uint32_t
2170 lpfc_rcv_logo_logo_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
2171                          void *arg, uint32_t evt)
2172 {
2173         struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
2174         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *)arg;
2175
2176         spin_lock_irq(shost->host_lock);
2177         ndlp->nlp_flag |= NLP_LOGO_ACC;
2178         spin_unlock_irq(shost->host_lock);
2179         lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
2180         return ndlp->nlp_state;
2181 }
2182
2183 static uint32_t
2184 lpfc_rcv_padisc_logo_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
2185                            void *arg, uint32_t evt)
2186 {
2187         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *)arg;
2188         struct ls_rjt     stat;
2189
2190         memset(&stat, 0, sizeof(struct ls_rjt));
2191         stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
2192         stat.un.b.lsRjtRsnCodeExp = LSEXP_NOTHING_MORE;
2193         lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
2194         return ndlp->nlp_state;
2195 }
2196
2197 static uint32_t
2198 lpfc_rcv_prlo_logo_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
2199                          void *arg, uint32_t evt)
2200 {
2201         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *)arg;
2202         struct ls_rjt     stat;
2203
2204         memset(&stat, 0, sizeof(struct ls_rjt));
2205         stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
2206         stat.un.b.lsRjtRsnCodeExp = LSEXP_NOTHING_MORE;
2207         lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
2208         return ndlp->nlp_state;
2209 }
2210
2211 static uint32_t
2212 lpfc_cmpl_logo_logo_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
2213                           void *arg, uint32_t evt)
2214 {
2215         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
2216
2217         ndlp->nlp_prev_state = NLP_STE_LOGO_ISSUE;
2218         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
2219         spin_lock_irq(shost->host_lock);
2220         ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
2221         spin_unlock_irq(shost->host_lock);
2222         lpfc_disc_set_adisc(vport, ndlp);
2223         return ndlp->nlp_state;
2224 }
2225
2226 static uint32_t
2227 lpfc_device_rm_logo_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
2228                           void *arg, uint32_t evt)
2229 {
2230         /*
2231          * DevLoss has timed out and is calling for Device Remove.
2232          * In this case, abort the LOGO and cleanup the ndlp
2233          */
2234
2235         lpfc_unreg_rpi(vport, ndlp);
2236         /* software abort outstanding PLOGI */
2237         lpfc_els_abort(vport->phba, ndlp);
2238         lpfc_drop_node(vport, ndlp);
2239         return NLP_STE_FREED_NODE;
2240 }
2241
2242 static uint32_t
2243 lpfc_device_recov_logo_issue(struct lpfc_vport *vport,
2244                              struct lpfc_nodelist *ndlp,
2245                              void *arg, uint32_t evt)
2246 {
2247         /*
2248          * Device Recovery events have no meaning for a node with a LOGO
2249          * outstanding.  The LOGO has to complete first and handle the
2250          * node from that point.
2251          */
2252         return ndlp->nlp_state;
2253 }
2254
2255 static uint32_t
2256 lpfc_rcv_plogi_unmap_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
2257                           void *arg, uint32_t evt)
2258 {
2259         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
2260
2261         lpfc_rcv_plogi(vport, ndlp, cmdiocb);
2262         return ndlp->nlp_state;
2263 }
2264
2265 static uint32_t
2266 lpfc_rcv_prli_unmap_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
2267                          void *arg, uint32_t evt)
2268 {
2269         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
2270
2271         if (!lpfc_rcv_prli_support_check(vport, ndlp, cmdiocb))
2272                 return ndlp->nlp_state;
2273
2274         lpfc_rcv_prli(vport, ndlp, cmdiocb);
2275         lpfc_els_rsp_prli_acc(vport, cmdiocb, ndlp);
2276         return ndlp->nlp_state;
2277 }
2278
2279 static uint32_t
2280 lpfc_rcv_logo_unmap_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
2281                          void *arg, uint32_t evt)
2282 {
2283         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
2284
2285         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_LOGO);
2286         return ndlp->nlp_state;
2287 }
2288
2289 static uint32_t
2290 lpfc_rcv_padisc_unmap_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
2291                            void *arg, uint32_t evt)
2292 {
2293         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
2294
2295         lpfc_rcv_padisc(vport, ndlp, cmdiocb);
2296         return ndlp->nlp_state;
2297 }
2298
2299 static uint32_t
2300 lpfc_rcv_prlo_unmap_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
2301                          void *arg, uint32_t evt)
2302 {
2303         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
2304
2305         lpfc_els_rsp_acc(vport, ELS_CMD_PRLO, cmdiocb, ndlp, NULL);
2306         return ndlp->nlp_state;
2307 }
2308
2309 static uint32_t
2310 lpfc_device_recov_unmap_node(struct lpfc_vport *vport,
2311                              struct lpfc_nodelist *ndlp,
2312                              void *arg,
2313                              uint32_t evt)
2314 {
2315         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
2316
2317         ndlp->nlp_prev_state = NLP_STE_UNMAPPED_NODE;
2318         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
2319         spin_lock_irq(shost->host_lock);
2320         ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
2321         ndlp->nlp_fc4_type &= ~(NLP_FC4_FCP | NLP_FC4_NVME);
2322         spin_unlock_irq(shost->host_lock);
2323         lpfc_disc_set_adisc(vport, ndlp);
2324
2325         return ndlp->nlp_state;
2326 }
2327
2328 static uint32_t
2329 lpfc_rcv_plogi_mapped_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
2330                            void *arg, uint32_t evt)
2331 {
2332         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
2333
2334         lpfc_rcv_plogi(vport, ndlp, cmdiocb);
2335         return ndlp->nlp_state;
2336 }
2337
2338 static uint32_t
2339 lpfc_rcv_prli_mapped_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
2340                           void *arg, uint32_t evt)
2341 {
2342         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
2343
2344         if (!lpfc_rcv_prli_support_check(vport, ndlp, cmdiocb))
2345                 return ndlp->nlp_state;
2346         lpfc_els_rsp_prli_acc(vport, cmdiocb, ndlp);
2347         return ndlp->nlp_state;
2348 }
2349
2350 static uint32_t
2351 lpfc_rcv_logo_mapped_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
2352                           void *arg, uint32_t evt)
2353 {
2354         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
2355
2356         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_LOGO);
2357         return ndlp->nlp_state;
2358 }
2359
2360 static uint32_t
2361 lpfc_rcv_padisc_mapped_node(struct lpfc_vport *vport,
2362                             struct lpfc_nodelist *ndlp,
2363                             void *arg, uint32_t evt)
2364 {
2365         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
2366
2367         lpfc_rcv_padisc(vport, ndlp, cmdiocb);
2368         return ndlp->nlp_state;
2369 }
2370
2371 static uint32_t
2372 lpfc_rcv_prlo_mapped_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
2373                           void *arg, uint32_t evt)
2374 {
2375         struct lpfc_hba  *phba = vport->phba;
2376         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
2377
2378         /* flush the target */
2379         lpfc_sli_abort_iocb(vport, &phba->sli.sli3_ring[LPFC_FCP_RING],
2380                             ndlp->nlp_sid, 0, LPFC_CTX_TGT);
2381
2382         /* Treat like rcv logo */
2383         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_PRLO);
2384         return ndlp->nlp_state;
2385 }
2386
2387 static uint32_t
2388 lpfc_device_recov_mapped_node(struct lpfc_vport *vport,
2389                               struct lpfc_nodelist *ndlp,
2390                               void *arg,
2391                               uint32_t evt)
2392 {
2393         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
2394
2395         ndlp->nlp_prev_state = NLP_STE_MAPPED_NODE;
2396         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
2397         spin_lock_irq(shost->host_lock);
2398         ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
2399         ndlp->nlp_fc4_type &= ~(NLP_FC4_FCP | NLP_FC4_NVME);
2400         spin_unlock_irq(shost->host_lock);
2401         lpfc_disc_set_adisc(vport, ndlp);
2402         return ndlp->nlp_state;
2403 }
2404
2405 static uint32_t
2406 lpfc_rcv_plogi_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
2407                         void *arg, uint32_t evt)
2408 {
2409         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
2410         struct lpfc_iocbq *cmdiocb  = (struct lpfc_iocbq *) arg;
2411
2412         /* Ignore PLOGI if we have an outstanding LOGO */
2413         if (ndlp->nlp_flag & (NLP_LOGO_SND | NLP_LOGO_ACC))
2414                 return ndlp->nlp_state;
2415         if (lpfc_rcv_plogi(vport, ndlp, cmdiocb)) {
2416                 lpfc_cancel_retry_delay_tmo(vport, ndlp);
2417                 spin_lock_irq(shost->host_lock);
2418                 ndlp->nlp_flag &= ~(NLP_NPR_ADISC | NLP_NPR_2B_DISC);
2419                 spin_unlock_irq(shost->host_lock);
2420         } else if (!(ndlp->nlp_flag & NLP_NPR_2B_DISC)) {
2421                 /* send PLOGI immediately, move to PLOGI issue state */
2422                 if (!(ndlp->nlp_flag & NLP_DELAY_TMO)) {
2423                         ndlp->nlp_prev_state = NLP_STE_NPR_NODE;
2424                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
2425                         lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0);
2426                 }
2427         }
2428         return ndlp->nlp_state;
2429 }
2430
2431 static uint32_t
2432 lpfc_rcv_prli_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
2433                        void *arg, uint32_t evt)
2434 {
2435         struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
2436         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
2437         struct ls_rjt     stat;
2438
2439         memset(&stat, 0, sizeof (struct ls_rjt));
2440         stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
2441         stat.un.b.lsRjtRsnCodeExp = LSEXP_NOTHING_MORE;
2442         lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
2443
2444         if (!(ndlp->nlp_flag & NLP_DELAY_TMO)) {
2445                 if (ndlp->nlp_flag & NLP_NPR_ADISC) {
2446                         spin_lock_irq(shost->host_lock);
2447                         ndlp->nlp_flag &= ~NLP_NPR_ADISC;
2448                         ndlp->nlp_prev_state = NLP_STE_NPR_NODE;
2449                         spin_unlock_irq(shost->host_lock);
2450                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_ADISC_ISSUE);
2451                         lpfc_issue_els_adisc(vport, ndlp, 0);
2452                 } else {
2453                         ndlp->nlp_prev_state = NLP_STE_NPR_NODE;
2454                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
2455                         lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0);
2456                 }
2457         }
2458         return ndlp->nlp_state;
2459 }
2460
2461 static uint32_t
2462 lpfc_rcv_logo_npr_node(struct lpfc_vport *vport,  struct lpfc_nodelist *ndlp,
2463                        void *arg, uint32_t evt)
2464 {
2465         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
2466
2467         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_LOGO);
2468         return ndlp->nlp_state;
2469 }
2470
2471 static uint32_t
2472 lpfc_rcv_padisc_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
2473                          void *arg, uint32_t evt)
2474 {
2475         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
2476
2477         lpfc_rcv_padisc(vport, ndlp, cmdiocb);
2478         /*
2479          * Do not start discovery if discovery is about to start
2480          * or discovery in progress for this node. Starting discovery
2481          * here will affect the counting of discovery threads.
2482          */
2483         if (!(ndlp->nlp_flag & NLP_DELAY_TMO) &&
2484             !(ndlp->nlp_flag & NLP_NPR_2B_DISC)) {
2485                 if (ndlp->nlp_flag & NLP_NPR_ADISC) {
2486                         ndlp->nlp_flag &= ~NLP_NPR_ADISC;
2487                         ndlp->nlp_prev_state = NLP_STE_NPR_NODE;
2488                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_ADISC_ISSUE);
2489                         lpfc_issue_els_adisc(vport, ndlp, 0);
2490                 } else {
2491                         ndlp->nlp_prev_state = NLP_STE_NPR_NODE;
2492                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
2493                         lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0);
2494                 }
2495         }
2496         return ndlp->nlp_state;
2497 }
2498
2499 static uint32_t
2500 lpfc_rcv_prlo_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
2501                        void *arg, uint32_t evt)
2502 {
2503         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
2504         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
2505
2506         spin_lock_irq(shost->host_lock);
2507         ndlp->nlp_flag |= NLP_LOGO_ACC;
2508         spin_unlock_irq(shost->host_lock);
2509
2510         lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
2511
2512         if ((ndlp->nlp_flag & NLP_DELAY_TMO) == 0) {
2513                 mod_timer(&ndlp->nlp_delayfunc,
2514                           jiffies + msecs_to_jiffies(1000 * 1));
2515                 spin_lock_irq(shost->host_lock);
2516                 ndlp->nlp_flag |= NLP_DELAY_TMO;
2517                 ndlp->nlp_flag &= ~NLP_NPR_ADISC;
2518                 spin_unlock_irq(shost->host_lock);
2519                 ndlp->nlp_last_elscmd = ELS_CMD_PLOGI;
2520         } else {
2521                 spin_lock_irq(shost->host_lock);
2522                 ndlp->nlp_flag &= ~NLP_NPR_ADISC;
2523                 spin_unlock_irq(shost->host_lock);
2524         }
2525         return ndlp->nlp_state;
2526 }
2527
2528 static uint32_t
2529 lpfc_cmpl_plogi_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
2530                          void *arg, uint32_t evt)
2531 {
2532         struct lpfc_iocbq *cmdiocb, *rspiocb;
2533         IOCB_t *irsp;
2534         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
2535
2536         cmdiocb = (struct lpfc_iocbq *) arg;
2537         rspiocb = cmdiocb->context_un.rsp_iocb;
2538
2539         irsp = &rspiocb->iocb;
2540         if (irsp->ulpStatus) {
2541                 spin_lock_irq(shost->host_lock);
2542                 ndlp->nlp_flag |= NLP_DEFER_RM;
2543                 spin_unlock_irq(shost->host_lock);
2544                 return NLP_STE_FREED_NODE;
2545         }
2546         return ndlp->nlp_state;
2547 }
2548
2549 static uint32_t
2550 lpfc_cmpl_prli_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
2551                         void *arg, uint32_t evt)
2552 {
2553         struct lpfc_iocbq *cmdiocb, *rspiocb;
2554         IOCB_t *irsp;
2555
2556         cmdiocb = (struct lpfc_iocbq *) arg;
2557         rspiocb = cmdiocb->context_un.rsp_iocb;
2558
2559         irsp = &rspiocb->iocb;
2560         if (irsp->ulpStatus && (ndlp->nlp_flag & NLP_NODEV_REMOVE)) {
2561                 lpfc_drop_node(vport, ndlp);
2562                 return NLP_STE_FREED_NODE;
2563         }
2564         return ndlp->nlp_state;
2565 }
2566
2567 static uint32_t
2568 lpfc_cmpl_logo_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
2569                         void *arg, uint32_t evt)
2570 {
2571         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
2572
2573         /* For the fabric port just clear the fc flags. */
2574         if (ndlp->nlp_DID == Fabric_DID) {
2575                 spin_lock_irq(shost->host_lock);
2576                 vport->fc_flag &= ~(FC_FABRIC | FC_PUBLIC_LOOP);
2577                 spin_unlock_irq(shost->host_lock);
2578         }
2579         lpfc_unreg_rpi(vport, ndlp);
2580         return ndlp->nlp_state;
2581 }
2582
2583 static uint32_t
2584 lpfc_cmpl_adisc_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
2585                          void *arg, uint32_t evt)
2586 {
2587         struct lpfc_iocbq *cmdiocb, *rspiocb;
2588         IOCB_t *irsp;
2589
2590         cmdiocb = (struct lpfc_iocbq *) arg;
2591         rspiocb = cmdiocb->context_un.rsp_iocb;
2592
2593         irsp = &rspiocb->iocb;
2594         if (irsp->ulpStatus && (ndlp->nlp_flag & NLP_NODEV_REMOVE)) {
2595                 lpfc_drop_node(vport, ndlp);
2596                 return NLP_STE_FREED_NODE;
2597         }
2598         return ndlp->nlp_state;
2599 }
2600
2601 static uint32_t
2602 lpfc_cmpl_reglogin_npr_node(struct lpfc_vport *vport,
2603                             struct lpfc_nodelist *ndlp,
2604                             void *arg, uint32_t evt)
2605 {
2606         LPFC_MBOXQ_t *pmb = (LPFC_MBOXQ_t *) arg;
2607         MAILBOX_t    *mb = &pmb->u.mb;
2608
2609         if (!mb->mbxStatus) {
2610                 /* SLI4 ports have preallocated logical rpis. */
2611                 if (vport->phba->sli_rev < LPFC_SLI_REV4)
2612                         ndlp->nlp_rpi = mb->un.varWords[0];
2613                 ndlp->nlp_flag |= NLP_RPI_REGISTERED;
2614                 if (ndlp->nlp_flag & NLP_LOGO_ACC) {
2615                         lpfc_unreg_rpi(vport, ndlp);
2616                 }
2617         } else {
2618                 if (ndlp->nlp_flag & NLP_NODEV_REMOVE) {
2619                         lpfc_drop_node(vport, ndlp);
2620                         return NLP_STE_FREED_NODE;
2621                 }
2622         }
2623         return ndlp->nlp_state;
2624 }
2625
2626 static uint32_t
2627 lpfc_device_rm_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
2628                         void *arg, uint32_t evt)
2629 {
2630         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
2631
2632         if (ndlp->nlp_flag & NLP_NPR_2B_DISC) {
2633                 spin_lock_irq(shost->host_lock);
2634                 ndlp->nlp_flag |= NLP_NODEV_REMOVE;
2635                 spin_unlock_irq(shost->host_lock);
2636                 return ndlp->nlp_state;
2637         }
2638         lpfc_drop_node(vport, ndlp);
2639         return NLP_STE_FREED_NODE;
2640 }
2641
2642 static uint32_t
2643 lpfc_device_recov_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
2644                            void *arg, uint32_t evt)
2645 {
2646         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
2647
2648         /* Don't do anything that will mess up processing of the
2649          * previous RSCN.
2650          */
2651         if (vport->fc_flag & FC_RSCN_DEFERRED)
2652                 return ndlp->nlp_state;
2653
2654         lpfc_cancel_retry_delay_tmo(vport, ndlp);
2655         spin_lock_irq(shost->host_lock);
2656         ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
2657         ndlp->nlp_fc4_type &= ~(NLP_FC4_FCP | NLP_FC4_NVME);
2658         spin_unlock_irq(shost->host_lock);
2659         return ndlp->nlp_state;
2660 }
2661
2662
2663 /* This next section defines the NPort Discovery State Machine */
2664
2665 /* There are 4 different double linked lists nodelist entries can reside on.
2666  * The plogi list and adisc list are used when Link Up discovery or RSCN
2667  * processing is needed. Each list holds the nodes that we will send PLOGI
2668  * or ADISC on. These lists will keep track of what nodes will be effected
2669  * by an RSCN, or a Link Up (Typically, all nodes are effected on Link Up).
2670  * The unmapped_list will contain all nodes that we have successfully logged
2671  * into at the Fibre Channel level. The mapped_list will contain all nodes
2672  * that are mapped FCP targets.
2673  */
2674 /*
2675  * The bind list is a list of undiscovered (potentially non-existent) nodes
2676  * that we have saved binding information on. This information is used when
2677  * nodes transition from the unmapped to the mapped list.
2678  */
2679 /* For UNUSED_NODE state, the node has just been allocated .
2680  * For PLOGI_ISSUE and REG_LOGIN_ISSUE, the node is on
2681  * the PLOGI list. For REG_LOGIN_COMPL, the node is taken off the PLOGI list
2682  * and put on the unmapped list. For ADISC processing, the node is taken off
2683  * the ADISC list and placed on either the mapped or unmapped list (depending
2684  * on its previous state). Once on the unmapped list, a PRLI is issued and the
2685  * state changed to PRLI_ISSUE. When the PRLI completion occurs, the state is
2686  * changed to UNMAPPED_NODE. If the completion indicates a mapped
2687  * node, the node is taken off the unmapped list. The binding list is checked
2688  * for a valid binding, or a binding is automatically assigned. If binding
2689  * assignment is unsuccessful, the node is left on the unmapped list. If
2690  * binding assignment is successful, the associated binding list entry (if
2691  * any) is removed, and the node is placed on the mapped list.
2692  */
2693 /*
2694  * For a Link Down, all nodes on the ADISC, PLOGI, unmapped or mapped
2695  * lists will receive a DEVICE_RECOVERY event. If the linkdown or devloss timers
2696  * expire, all effected nodes will receive a DEVICE_RM event.
2697  */
2698 /*
2699  * For a Link Up or RSCN, all nodes will move from the mapped / unmapped lists
2700  * to either the ADISC or PLOGI list.  After a Nameserver query or ALPA loopmap
2701  * check, additional nodes may be added or removed (via DEVICE_RM) to / from
2702  * the PLOGI or ADISC lists. Once the PLOGI and ADISC lists are populated,
2703  * we will first process the ADISC list.  32 entries are processed initially and
2704  * ADISC is initited for each one.  Completions / Events for each node are
2705  * funnelled thru the state machine.  As each node finishes ADISC processing, it
2706  * starts ADISC for any nodes waiting for ADISC processing. If no nodes are
2707  * waiting, and the ADISC list count is identically 0, then we are done. For
2708  * Link Up discovery, since all nodes on the PLOGI list are UNREG_LOGIN'ed, we
2709  * can issue a CLEAR_LA and reenable Link Events. Next we will process the PLOGI
2710  * list.  32 entries are processed initially and PLOGI is initited for each one.
2711  * Completions / Events for each node are funnelled thru the state machine.  As
2712  * each node finishes PLOGI processing, it starts PLOGI for any nodes waiting
2713  * for PLOGI processing. If no nodes are waiting, and the PLOGI list count is
2714  * indentically 0, then we are done. We have now completed discovery / RSCN
2715  * handling. Upon completion, ALL nodes should be on either the mapped or
2716  * unmapped lists.
2717  */
2718
2719 static uint32_t (*lpfc_disc_action[NLP_STE_MAX_STATE * NLP_EVT_MAX_EVENT])
2720      (struct lpfc_vport *, struct lpfc_nodelist *, void *, uint32_t) = {
2721         /* Action routine                  Event       Current State  */
2722         lpfc_rcv_plogi_unused_node,     /* RCV_PLOGI   UNUSED_NODE    */
2723         lpfc_rcv_els_unused_node,       /* RCV_PRLI        */
2724         lpfc_rcv_logo_unused_node,      /* RCV_LOGO        */
2725         lpfc_rcv_els_unused_node,       /* RCV_ADISC       */
2726         lpfc_rcv_els_unused_node,       /* RCV_PDISC       */
2727         lpfc_rcv_els_unused_node,       /* RCV_PRLO        */
2728         lpfc_disc_illegal,              /* CMPL_PLOGI      */
2729         lpfc_disc_illegal,              /* CMPL_PRLI       */
2730         lpfc_cmpl_logo_unused_node,     /* CMPL_LOGO       */
2731         lpfc_disc_illegal,              /* CMPL_ADISC      */
2732         lpfc_disc_illegal,              /* CMPL_REG_LOGIN  */
2733         lpfc_device_rm_unused_node,     /* DEVICE_RM       */
2734         lpfc_device_recov_unused_node,  /* DEVICE_RECOVERY */
2735
2736         lpfc_rcv_plogi_plogi_issue,     /* RCV_PLOGI   PLOGI_ISSUE    */
2737         lpfc_rcv_prli_plogi_issue,      /* RCV_PRLI        */
2738         lpfc_rcv_logo_plogi_issue,      /* RCV_LOGO        */
2739         lpfc_rcv_els_plogi_issue,       /* RCV_ADISC       */
2740         lpfc_rcv_els_plogi_issue,       /* RCV_PDISC       */
2741         lpfc_rcv_els_plogi_issue,       /* RCV_PRLO        */
2742         lpfc_cmpl_plogi_plogi_issue,    /* CMPL_PLOGI      */
2743         lpfc_disc_illegal,              /* CMPL_PRLI       */
2744         lpfc_cmpl_logo_plogi_issue,     /* CMPL_LOGO       */
2745         lpfc_disc_illegal,              /* CMPL_ADISC      */
2746         lpfc_cmpl_reglogin_plogi_issue,/* CMPL_REG_LOGIN  */
2747         lpfc_device_rm_plogi_issue,     /* DEVICE_RM       */
2748         lpfc_device_recov_plogi_issue,  /* DEVICE_RECOVERY */
2749
2750         lpfc_rcv_plogi_adisc_issue,     /* RCV_PLOGI   ADISC_ISSUE    */
2751         lpfc_rcv_prli_adisc_issue,      /* RCV_PRLI        */
2752         lpfc_rcv_logo_adisc_issue,      /* RCV_LOGO        */
2753         lpfc_rcv_padisc_adisc_issue,    /* RCV_ADISC       */
2754         lpfc_rcv_padisc_adisc_issue,    /* RCV_PDISC       */
2755         lpfc_rcv_prlo_adisc_issue,      /* RCV_PRLO        */
2756         lpfc_disc_illegal,              /* CMPL_PLOGI      */
2757         lpfc_disc_illegal,              /* CMPL_PRLI       */
2758         lpfc_disc_illegal,              /* CMPL_LOGO       */
2759         lpfc_cmpl_adisc_adisc_issue,    /* CMPL_ADISC      */
2760         lpfc_disc_illegal,              /* CMPL_REG_LOGIN  */
2761         lpfc_device_rm_adisc_issue,     /* DEVICE_RM       */
2762         lpfc_device_recov_adisc_issue,  /* DEVICE_RECOVERY */
2763
2764         lpfc_rcv_plogi_reglogin_issue,  /* RCV_PLOGI  REG_LOGIN_ISSUE */
2765         lpfc_rcv_prli_reglogin_issue,   /* RCV_PLOGI       */
2766         lpfc_rcv_logo_reglogin_issue,   /* RCV_LOGO        */
2767         lpfc_rcv_padisc_reglogin_issue, /* RCV_ADISC       */
2768         lpfc_rcv_padisc_reglogin_issue, /* RCV_PDISC       */
2769         lpfc_rcv_prlo_reglogin_issue,   /* RCV_PRLO        */
2770         lpfc_cmpl_plogi_illegal,        /* CMPL_PLOGI      */
2771         lpfc_disc_illegal,              /* CMPL_PRLI       */
2772         lpfc_disc_illegal,              /* CMPL_LOGO       */
2773         lpfc_disc_illegal,              /* CMPL_ADISC      */
2774         lpfc_cmpl_reglogin_reglogin_issue,/* CMPL_REG_LOGIN  */
2775         lpfc_device_rm_reglogin_issue,  /* DEVICE_RM       */
2776         lpfc_device_recov_reglogin_issue,/* DEVICE_RECOVERY */
2777
2778         lpfc_rcv_plogi_prli_issue,      /* RCV_PLOGI   PRLI_ISSUE     */
2779         lpfc_rcv_prli_prli_issue,       /* RCV_PRLI        */
2780         lpfc_rcv_logo_prli_issue,       /* RCV_LOGO        */
2781         lpfc_rcv_padisc_prli_issue,     /* RCV_ADISC       */
2782         lpfc_rcv_padisc_prli_issue,     /* RCV_PDISC       */
2783         lpfc_rcv_prlo_prli_issue,       /* RCV_PRLO        */
2784         lpfc_cmpl_plogi_illegal,        /* CMPL_PLOGI      */
2785         lpfc_cmpl_prli_prli_issue,      /* CMPL_PRLI       */
2786         lpfc_disc_illegal,              /* CMPL_LOGO       */
2787         lpfc_disc_illegal,              /* CMPL_ADISC      */
2788         lpfc_disc_illegal,              /* CMPL_REG_LOGIN  */
2789         lpfc_device_rm_prli_issue,      /* DEVICE_RM       */
2790         lpfc_device_recov_prli_issue,   /* DEVICE_RECOVERY */
2791
2792         lpfc_rcv_plogi_logo_issue,      /* RCV_PLOGI   LOGO_ISSUE     */
2793         lpfc_rcv_prli_logo_issue,       /* RCV_PRLI        */
2794         lpfc_rcv_logo_logo_issue,       /* RCV_LOGO        */
2795         lpfc_rcv_padisc_logo_issue,     /* RCV_ADISC       */
2796         lpfc_rcv_padisc_logo_issue,     /* RCV_PDISC       */
2797         lpfc_rcv_prlo_logo_issue,       /* RCV_PRLO        */
2798         lpfc_cmpl_plogi_illegal,        /* CMPL_PLOGI      */
2799         lpfc_disc_illegal,              /* CMPL_PRLI       */
2800         lpfc_cmpl_logo_logo_issue,      /* CMPL_LOGO       */
2801         lpfc_disc_illegal,              /* CMPL_ADISC      */
2802         lpfc_disc_illegal,              /* CMPL_REG_LOGIN  */
2803         lpfc_device_rm_logo_issue,      /* DEVICE_RM       */
2804         lpfc_device_recov_logo_issue,   /* DEVICE_RECOVERY */
2805
2806         lpfc_rcv_plogi_unmap_node,      /* RCV_PLOGI   UNMAPPED_NODE  */
2807         lpfc_rcv_prli_unmap_node,       /* RCV_PRLI        */
2808         lpfc_rcv_logo_unmap_node,       /* RCV_LOGO        */
2809         lpfc_rcv_padisc_unmap_node,     /* RCV_ADISC       */
2810         lpfc_rcv_padisc_unmap_node,     /* RCV_PDISC       */
2811         lpfc_rcv_prlo_unmap_node,       /* RCV_PRLO        */
2812         lpfc_disc_illegal,              /* CMPL_PLOGI      */
2813         lpfc_disc_illegal,              /* CMPL_PRLI       */
2814         lpfc_disc_illegal,              /* CMPL_LOGO       */
2815         lpfc_disc_illegal,              /* CMPL_ADISC      */
2816         lpfc_disc_illegal,              /* CMPL_REG_LOGIN  */
2817         lpfc_disc_illegal,              /* DEVICE_RM       */
2818         lpfc_device_recov_unmap_node,   /* DEVICE_RECOVERY */
2819
2820         lpfc_rcv_plogi_mapped_node,     /* RCV_PLOGI   MAPPED_NODE    */
2821         lpfc_rcv_prli_mapped_node,      /* RCV_PRLI        */
2822         lpfc_rcv_logo_mapped_node,      /* RCV_LOGO        */
2823         lpfc_rcv_padisc_mapped_node,    /* RCV_ADISC       */
2824         lpfc_rcv_padisc_mapped_node,    /* RCV_PDISC       */
2825         lpfc_rcv_prlo_mapped_node,      /* RCV_PRLO        */
2826         lpfc_disc_illegal,              /* CMPL_PLOGI      */
2827         lpfc_disc_illegal,              /* CMPL_PRLI       */
2828         lpfc_disc_illegal,              /* CMPL_LOGO       */
2829         lpfc_disc_illegal,              /* CMPL_ADISC      */
2830         lpfc_disc_illegal,              /* CMPL_REG_LOGIN  */
2831         lpfc_disc_illegal,              /* DEVICE_RM       */
2832         lpfc_device_recov_mapped_node,  /* DEVICE_RECOVERY */
2833
2834         lpfc_rcv_plogi_npr_node,        /* RCV_PLOGI   NPR_NODE    */
2835         lpfc_rcv_prli_npr_node,         /* RCV_PRLI        */
2836         lpfc_rcv_logo_npr_node,         /* RCV_LOGO        */
2837         lpfc_rcv_padisc_npr_node,       /* RCV_ADISC       */
2838         lpfc_rcv_padisc_npr_node,       /* RCV_PDISC       */
2839         lpfc_rcv_prlo_npr_node,         /* RCV_PRLO        */
2840         lpfc_cmpl_plogi_npr_node,       /* CMPL_PLOGI      */
2841         lpfc_cmpl_prli_npr_node,        /* CMPL_PRLI       */
2842         lpfc_cmpl_logo_npr_node,        /* CMPL_LOGO       */
2843         lpfc_cmpl_adisc_npr_node,       /* CMPL_ADISC      */
2844         lpfc_cmpl_reglogin_npr_node,    /* CMPL_REG_LOGIN  */
2845         lpfc_device_rm_npr_node,        /* DEVICE_RM       */
2846         lpfc_device_recov_npr_node,     /* DEVICE_RECOVERY */
2847 };
2848
2849 int
2850 lpfc_disc_state_machine(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
2851                         void *arg, uint32_t evt)
2852 {
2853         uint32_t cur_state, rc;
2854         uint32_t(*func) (struct lpfc_vport *, struct lpfc_nodelist *, void *,
2855                          uint32_t);
2856         uint32_t got_ndlp = 0;
2857
2858         if (lpfc_nlp_get(ndlp))
2859                 got_ndlp = 1;
2860
2861         cur_state = ndlp->nlp_state;
2862
2863         /* DSM in event <evt> on NPort <nlp_DID> in state <cur_state> */
2864         lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
2865                          "0211 DSM in event x%x on NPort x%x in "
2866                          "state %d Data: x%x\n",
2867                          evt, ndlp->nlp_DID, cur_state, ndlp->nlp_flag);
2868
2869         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_DSM,
2870                  "DSM in:          evt:%d ste:%d did:x%x",
2871                 evt, cur_state, ndlp->nlp_DID);
2872
2873         func = lpfc_disc_action[(cur_state * NLP_EVT_MAX_EVENT) + evt];
2874         rc = (func) (vport, ndlp, arg, evt);
2875
2876         /* DSM out state <rc> on NPort <nlp_DID> */
2877         if (got_ndlp) {
2878                 lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
2879                          "0212 DSM out state %d on NPort x%x Data: x%x\n",
2880                          rc, ndlp->nlp_DID, ndlp->nlp_flag);
2881
2882                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_DSM,
2883                         "DSM out:         ste:%d did:x%x flg:x%x",
2884                         rc, ndlp->nlp_DID, ndlp->nlp_flag);
2885                 /* Decrement the ndlp reference count held for this function */
2886                 lpfc_nlp_put(ndlp);
2887         } else {
2888                 lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
2889                         "0213 DSM out state %d on NPort free\n", rc);
2890
2891                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_DSM,
2892                         "DSM out:         ste:%d did:x%x flg:x%x",
2893                         rc, 0, 0);
2894         }
2895
2896         return rc;
2897 }