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) 2004-2009 Emulex.  All rights reserved.           *
   5  * EMULEX and SLI are trademarks of Emulex.                        *
   6  * www.emulex.com                                                  *
   7  * Portions Copyright (C) 2004-2005 Christoph Hellwig              *
   8  *                                                                 *
   9  * This program is free software; you can redistribute it and/or   *
  10  * modify it under the terms of version 2 of the GNU General       *
  11  * Public License as published by the Free Software Foundation.    *
  12  * This program is distributed in the hope that it will be useful. *
  13  * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND          *
  14  * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,  *
  15  * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE      *
  16  * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
  17  * TO BE LEGALLY INVALID.  See the GNU General Public License for  *
  18  * more details, a copy of which can be found in the file COPYING  *
  19  * included with this package.                                     *
  20  *******************************************************************/
  21
  22 #include <linux/blkdev.h>
  23 #include <linux/pci.h>
  24 #include <linux/slab.h>
  25 #include <linux/interrupt.h>
  26
  27 #include <scsi/scsi.h>
  28 #include <scsi/scsi_device.h>
  29 #include <scsi/scsi_host.h>
  30 #include <scsi/scsi_transport_fc.h>
  31
  32 #include "lpfc_hw4.h"
  33 #include "lpfc_hw.h"
  34 #include "lpfc_sli.h"
  35 #include "lpfc_sli4.h"
  36 #include "lpfc_nl.h"
  37 #include "lpfc_disc.h"
  38 #include "lpfc_scsi.h"
  39 #include "lpfc.h"
  40 #include "lpfc_logmsg.h"
  41 #include "lpfc_crtn.h"
  42 #include "lpfc_vport.h"
  43 #include "lpfc_debugfs.h"
  44
  45
  46 /* Called to verify a rcv'ed ADISC was intended for us. */
  47 static int
  48 lpfc_check_adisc(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
  49                  struct lpfc_name *nn, struct lpfc_name *pn)
  50 {
  51         /* Compare the ADISC rsp WWNN / WWPN matches our internal node
  52          * table entry for that node.
  53          */
  54         if (memcmp(nn, &ndlp->nlp_nodename, sizeof (struct lpfc_name)))
  55                 return 0;
  56
  57         if (memcmp(pn, &ndlp->nlp_portname, sizeof (struct lpfc_name)))
  58                 return 0;
  59
  60         /* we match, return success */
  61         return 1;
  62 }
  63
  64 int
  65 lpfc_check_sparm(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
  66                  struct serv_parm *sp, uint32_t class, int flogi)
  67 {
  68         volatile struct serv_parm *hsp = &vport->fc_sparam;
  69         uint16_t hsp_value, ssp_value = 0;
  70
  71         /*
  72          * The receive data field size and buffer-to-buffer receive data field
  73          * size entries are 16 bits but are represented as two 8-bit fields in
  74          * the driver data structure to account for rsvd bits and other control
  75          * bits.  Reconstruct and compare the fields as a 16-bit values before
  76          * correcting the byte values.
  77          */
  78         if (sp->cls1.classValid) {
  79                 if (!flogi) {
  80                         hsp_value = ((hsp->cls1.rcvDataSizeMsb << 8) |
  81                                      hsp->cls1.rcvDataSizeLsb);
  82                         ssp_value = ((sp->cls1.rcvDataSizeMsb << 8) |
  83                                      sp->cls1.rcvDataSizeLsb);
  84                         if (!ssp_value)
  85                                 goto bad_service_param;
  86                         if (ssp_value > hsp_value) {
  87                                 sp->cls1.rcvDataSizeLsb =
  88                                         hsp->cls1.rcvDataSizeLsb;
  89                                 sp->cls1.rcvDataSizeMsb =
  90                                         hsp->cls1.rcvDataSizeMsb;
  91                         }
  92                 }
  93         } else if (class == CLASS1)
  94                 goto bad_service_param;
  95         if (sp->cls2.classValid) {
  96                 if (!flogi) {
  97                         hsp_value = ((hsp->cls2.rcvDataSizeMsb << 8) |
  98                                      hsp->cls2.rcvDataSizeLsb);
  99                         ssp_value = ((sp->cls2.rcvDataSizeMsb << 8) |
 100                                      sp->cls2.rcvDataSizeLsb);
 101                         if (!ssp_value)
 102                                 goto bad_service_param;
 103                         if (ssp_value > hsp_value) {
 104                                 sp->cls2.rcvDataSizeLsb =
 105                                         hsp->cls2.rcvDataSizeLsb;
 106                                 sp->cls2.rcvDataSizeMsb =
 107                                         hsp->cls2.rcvDataSizeMsb;
 108                         }
 109                 }
 110         } else if (class == CLASS2)
 111                 goto bad_service_param;
 112         if (sp->cls3.classValid) {
 113                 if (!flogi) {
 114                         hsp_value = ((hsp->cls3.rcvDataSizeMsb << 8) |
 115                                      hsp->cls3.rcvDataSizeLsb);
 116                         ssp_value = ((sp->cls3.rcvDataSizeMsb << 8) |
 117                                      sp->cls3.rcvDataSizeLsb);
 118                         if (!ssp_value)
 119                                 goto bad_service_param;
 120                         if (ssp_value > hsp_value) {
 121                                 sp->cls3.rcvDataSizeLsb =
 122                                         hsp->cls3.rcvDataSizeLsb;
 123                                 sp->cls3.rcvDataSizeMsb =
 124                                         hsp->cls3.rcvDataSizeMsb;
 125                         }
 126                 }
 127         } else if (class == CLASS3)
 128                 goto bad_service_param;
 129
 130         /*
 131          * Preserve the upper four bits of the MSB from the PLOGI response.
 132          * These bits contain the Buffer-to-Buffer State Change Number
 133          * from the target and need to be passed to the FW.
 134          */
 135         hsp_value = (hsp->cmn.bbRcvSizeMsb << 8) | hsp->cmn.bbRcvSizeLsb;
 136         ssp_value = (sp->cmn.bbRcvSizeMsb << 8) | sp->cmn.bbRcvSizeLsb;
 137         if (ssp_value > hsp_value) {
 138                 sp->cmn.bbRcvSizeLsb = hsp->cmn.bbRcvSizeLsb;
 139                 sp->cmn.bbRcvSizeMsb = (sp->cmn.bbRcvSizeMsb & 0xF0) |
 140                                        (hsp->cmn.bbRcvSizeMsb & 0x0F);
 141         }
 142
 143         memcpy(&ndlp->nlp_nodename, &sp->nodeName, sizeof (struct lpfc_name));
 144         memcpy(&ndlp->nlp_portname, &sp->portName, sizeof (struct lpfc_name));
 145         return 1;
 146 bad_service_param:
 147         lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
 148                          "0207 Device %x "
 149                          "(%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x) sent "
 150                          "invalid service parameters.  Ignoring device.\n",
 151                          ndlp->nlp_DID,
 152                          sp->nodeName.u.wwn[0], sp->nodeName.u.wwn[1],
 153                          sp->nodeName.u.wwn[2], sp->nodeName.u.wwn[3],
 154                          sp->nodeName.u.wwn[4], sp->nodeName.u.wwn[5],
 155                          sp->nodeName.u.wwn[6], sp->nodeName.u.wwn[7]);
 156         return 0;
 157 }
 158
 159 static void *
 160 lpfc_check_elscmpl_iocb(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
 161                         struct lpfc_iocbq *rspiocb)
 162 {
 163         struct lpfc_dmabuf *pcmd, *prsp;
 164         uint32_t *lp;
 165         void     *ptr = NULL;
 166         IOCB_t   *irsp;
 167
 168         irsp = &rspiocb->iocb;
 169         pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
 170
 171         /* For lpfc_els_abort, context2 could be zero'ed to delay
 172          * freeing associated memory till after ABTS completes.
 173          */
 174         if (pcmd) {
 175                 prsp =  list_get_first(&pcmd->list, struct lpfc_dmabuf,
 176                                        list);
 177                 if (prsp) {
 178                         lp = (uint32_t *) prsp->virt;
 179                         ptr = (void *)((uint8_t *)lp + sizeof(uint32_t));
 180                 }
 181         } else {
 182                 /* Force ulpStatus error since we are returning NULL ptr */
 183                 if (!(irsp->ulpStatus)) {
 184                         irsp->ulpStatus = IOSTAT_LOCAL_REJECT;
 185                         irsp->un.ulpWord[4] = IOERR_SLI_ABORTED;
 186                 }
 187                 ptr = NULL;
 188         }
 189         return ptr;
 190 }
 191
 192
 193
 194 /*
 195  * Free resources / clean up outstanding I/Os
 196  * associated with a LPFC_NODELIST entry. This
 197  * routine effectively results in a "software abort".
 198  */
 199 int
 200 lpfc_els_abort(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
 201 {
 202         LIST_HEAD(completions);
 203         LIST_HEAD(txcmplq_completions);
 204         LIST_HEAD(abort_list);
 205         struct lpfc_sli  *psli = &phba->sli;
 206         struct lpfc_sli_ring *pring = &psli->ring[LPFC_ELS_RING];
 207         struct lpfc_iocbq *iocb, *next_iocb;
 208
 209         /* Abort outstanding I/O on NPort <nlp_DID> */
 210         lpfc_printf_vlog(ndlp->vport, KERN_INFO, LOG_DISCOVERY,
 211                          "2819 Abort outstanding I/O on NPort x%x "
 212                          "Data: x%x x%x x%x\n",
 213                          ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
 214                          ndlp->nlp_rpi);
 215
 216         lpfc_fabric_abort_nport(ndlp);
 217
 218         /* First check the txq */
 219         spin_lock_irq(&phba->hbalock);
 220         list_for_each_entry_safe(iocb, next_iocb, &pring->txq, list) {
 221                 /* Check to see if iocb matches the nport we are looking for */
 222                 if (lpfc_check_sli_ndlp(phba, pring, iocb, ndlp)) {
 223                         /* It matches, so deque and call compl with anp error */
 224                         list_move_tail(&iocb->list, &completions);
 225                         pring->txq_cnt--;
 226                 }
 227         }
 228
 229         /* Next check the txcmplq */
 230         list_splice_init(&pring->txcmplq, &txcmplq_completions);
 231         spin_unlock_irq(&phba->hbalock);
 232
 233         list_for_each_entry_safe(iocb, next_iocb, &txcmplq_completions, list) {
 234                 /* Check to see if iocb matches the nport we are looking for */
 235                 if (lpfc_check_sli_ndlp(phba, pring, iocb, ndlp))
 236                         list_add_tail(&iocb->dlist, &abort_list);
 237         }
 238         spin_lock_irq(&phba->hbalock);
 239         list_splice(&txcmplq_completions, &pring->txcmplq);
 240         spin_unlock_irq(&phba->hbalock);
 241
 242         list_for_each_entry_safe(iocb, next_iocb, &abort_list, dlist) {
 243                         spin_lock_irq(&phba->hbalock);
 244                         list_del_init(&iocb->dlist);
 245                         lpfc_sli_issue_abort_iotag(phba, pring, iocb);
 246                         spin_unlock_irq(&phba->hbalock);
 247         }
 248
 249         /* Cancel all the IOCBs from the completions list */
 250         lpfc_sli_cancel_iocbs(phba, &completions, IOSTAT_LOCAL_REJECT,
 251                               IOERR_SLI_ABORTED);
 252
 253         lpfc_cancel_retry_delay_tmo(phba->pport, ndlp);
 254         return 0;
 255 }
 256
 257 static int
 258 lpfc_rcv_plogi(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 259                struct lpfc_iocbq *cmdiocb)
 260 {
 261         struct Scsi_Host   *shost = lpfc_shost_from_vport(vport);
 262         struct lpfc_hba    *phba = vport->phba;
 263         struct lpfc_dmabuf *pcmd;
 264         uint32_t *lp;
 265         IOCB_t *icmd;
 266         struct serv_parm *sp;
 267         LPFC_MBOXQ_t *mbox;
 268         struct ls_rjt stat;
 269         int rc;
 270
 271         memset(&stat, 0, sizeof (struct ls_rjt));
 272         if (vport->port_state <= LPFC_FDISC) {
 273                 /* Before responding to PLOGI, check for pt2pt mode.
 274                  * If we are pt2pt, with an outstanding FLOGI, abort
 275                  * the FLOGI and resend it first.
 276                  */
 277                 if (vport->fc_flag & FC_PT2PT) {
 278                          lpfc_els_abort_flogi(phba);
 279                         if (!(vport->fc_flag & FC_PT2PT_PLOGI)) {
 280                                 /* If the other side is supposed to initiate
 281                                  * the PLOGI anyway, just ACC it now and
 282                                  * move on with discovery.
 283                                  */
 284                                 phba->fc_edtov = FF_DEF_EDTOV;
 285                                 phba->fc_ratov = FF_DEF_RATOV;
 286                                 /* Start discovery - this should just do
 287                                    CLEAR_LA */
 288                                 lpfc_disc_start(vport);
 289                         } else
 290                                 lpfc_initial_flogi(vport);
 291                 } else {
 292                         stat.un.b.lsRjtRsnCode = LSRJT_LOGICAL_BSY;
 293                         stat.un.b.lsRjtRsnCodeExp = LSEXP_NOTHING_MORE;
 294                         lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb,
 295                                             ndlp, NULL);
 296                         return 0;
 297                 }
 298         }
 299         pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
 300         lp = (uint32_t *) pcmd->virt;
 301         sp = (struct serv_parm *) ((uint8_t *) lp + sizeof (uint32_t));
 302         if (wwn_to_u64(sp->portName.u.wwn) == 0) {
 303                 lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
 304                                  "0140 PLOGI Reject: invalid nname\n");
 305                 stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
 306                 stat.un.b.lsRjtRsnCodeExp = LSEXP_INVALID_PNAME;
 307                 lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp,
 308                         NULL);
 309                 return 0;
 310         }
 311         if (wwn_to_u64(sp->nodeName.u.wwn) == 0) {
 312                 lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
 313                                  "0141 PLOGI Reject: invalid pname\n");
 314                 stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
 315                 stat.un.b.lsRjtRsnCodeExp = LSEXP_INVALID_NNAME;
 316                 lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp,
 317                         NULL);
 318                 return 0;
 319         }
 320         if ((lpfc_check_sparm(vport, ndlp, sp, CLASS3, 0) == 0)) {
 321                 /* Reject this request because invalid parameters */
 322                 stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
 323                 stat.un.b.lsRjtRsnCodeExp = LSEXP_SPARM_OPTIONS;
 324                 lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp,
 325                         NULL);
 326                 return 0;
 327         }
 328         icmd = &cmdiocb->iocb;
 329
 330         /* PLOGI chkparm OK */
 331         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
 332                          "0114 PLOGI chkparm OK Data: x%x x%x x%x x%x\n",
 333                          ndlp->nlp_DID, ndlp->nlp_state, ndlp->nlp_flag,
 334                          ndlp->nlp_rpi);
 335
 336         if (vport->cfg_fcp_class == 2 && sp->cls2.classValid)
 337                 ndlp->nlp_fcp_info |= CLASS2;
 338         else
 339                 ndlp->nlp_fcp_info |= CLASS3;
 340
 341         ndlp->nlp_class_sup = 0;
 342         if (sp->cls1.classValid)
 343                 ndlp->nlp_class_sup |= FC_COS_CLASS1;
 344         if (sp->cls2.classValid)
 345                 ndlp->nlp_class_sup |= FC_COS_CLASS2;
 346         if (sp->cls3.classValid)
 347                 ndlp->nlp_class_sup |= FC_COS_CLASS3;
 348         if (sp->cls4.classValid)
 349                 ndlp->nlp_class_sup |= FC_COS_CLASS4;
 350         ndlp->nlp_maxframe =
 351                 ((sp->cmn.bbRcvSizeMsb & 0x0F) << 8) | sp->cmn.bbRcvSizeLsb;
 352
 353         /*
 354          * Need to unreg_login if we are already in one of these states and
 355          * change to NPR state. This will block the port until after the ACC
 356          * completes and the reg_login is issued and completed.
 357          */
 358         switch (ndlp->nlp_state) {
 359         case  NLP_STE_NPR_NODE:
 360                 if (!(ndlp->nlp_flag & NLP_NPR_ADISC))
 361                         break;
 362         case  NLP_STE_REG_LOGIN_ISSUE:
 363         case  NLP_STE_PRLI_ISSUE:
 364         case  NLP_STE_UNMAPPED_NODE:
 365         case  NLP_STE_MAPPED_NODE:
 366                 lpfc_unreg_rpi(vport, ndlp);
 367                 ndlp->nlp_prev_state = ndlp->nlp_state;
 368                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
 369         }
 370
 371         if ((vport->fc_flag & FC_PT2PT) &&
 372             !(vport->fc_flag & FC_PT2PT_PLOGI)) {
 373                 /* rcv'ed PLOGI decides what our NPortId will be */
 374                 vport->fc_myDID = icmd->un.rcvels.parmRo;
 375                 mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
 376                 if (mbox == NULL)
 377                         goto out;
 378                 lpfc_config_link(phba, mbox);
 379                 mbox->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
 380                 mbox->vport = vport;
 381                 rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
 382                 if (rc == MBX_NOT_FINISHED) {
 383                         mempool_free(mbox, phba->mbox_mem_pool);
 384                         goto out;
 385                 }
 386
 387                 lpfc_can_disctmo(vport);
 388         }
 389         mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
 390         if (!mbox)
 391                 goto out;
 392
 393         rc = lpfc_reg_rpi(phba, vport->vpi, icmd->un.rcvels.remoteID,
 394                             (uint8_t *) sp, mbox, ndlp->nlp_rpi);
 395         if (rc) {
 396                 mempool_free(mbox, phba->mbox_mem_pool);
 397                 goto out;
 398         }
 399
 400         /* ACC PLOGI rsp command needs to execute first,
 401          * queue this mbox command to be processed later.
 402          */
 403         mbox->mbox_cmpl = lpfc_mbx_cmpl_reg_login;
 404         /*
 405          * mbox->context2 = lpfc_nlp_get(ndlp) deferred until mailbox
 406          * command issued in lpfc_cmpl_els_acc().
 407          */
 408         mbox->vport = vport;
 409         spin_lock_irq(shost->host_lock);
 410         ndlp->nlp_flag |= (NLP_ACC_REGLOGIN | NLP_RCV_PLOGI);
 411         spin_unlock_irq(shost->host_lock);
 412
 413         /*
 414          * If there is an outstanding PLOGI issued, abort it before
 415          * sending ACC rsp for received PLOGI. If pending plogi
 416          * is not canceled here, the plogi will be rejected by
 417          * remote port and will be retried. On a configuration with
 418          * single discovery thread, this will cause a huge delay in
 419          * discovery. Also this will cause multiple state machines
 420          * running in parallel for this node.
 421          */
 422         if (ndlp->nlp_state == NLP_STE_PLOGI_ISSUE) {
 423                 /* software abort outstanding PLOGI */
 424                 lpfc_els_abort(phba, ndlp);
 425         }
 426
 427         if ((vport->port_type == LPFC_NPIV_PORT &&
 428              vport->cfg_restrict_login)) {
 429
 430                 /* In order to preserve RPIs, we want to cleanup
 431                  * the default RPI the firmware created to rcv
 432                  * this ELS request. The only way to do this is
 433                  * to register, then unregister the RPI.
 434                  */
 435                 spin_lock_irq(shost->host_lock);
 436                 ndlp->nlp_flag |= NLP_RM_DFLT_RPI;
 437                 spin_unlock_irq(shost->host_lock);
 438                 stat.un.b.lsRjtRsnCode = LSRJT_INVALID_CMD;
 439                 stat.un.b.lsRjtRsnCodeExp = LSEXP_NOTHING_MORE;
 440                 lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb,
 441                         ndlp, mbox);
 442                 return 1;
 443         }
 444         lpfc_els_rsp_acc(vport, ELS_CMD_PLOGI, cmdiocb, ndlp, mbox);
 445         return 1;
 446 out:
 447         stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
 448         stat.un.b.lsRjtRsnCodeExp = LSEXP_OUT_OF_RESOURCE;
 449         lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
 450         return 0;
 451 }
 452
 453 static int
 454 lpfc_rcv_padisc(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 455                 struct lpfc_iocbq *cmdiocb)
 456 {
 457         struct Scsi_Host   *shost = lpfc_shost_from_vport(vport);
 458         struct lpfc_dmabuf *pcmd;
 459         struct serv_parm   *sp;
 460         struct lpfc_name   *pnn, *ppn;
 461         struct ls_rjt stat;
 462         ADISC *ap;
 463         IOCB_t *icmd;
 464         uint32_t *lp;
 465         uint32_t cmd;
 466
 467         pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
 468         lp = (uint32_t *) pcmd->virt;
 469
 470         cmd = *lp++;
 471         if (cmd == ELS_CMD_ADISC) {
 472                 ap = (ADISC *) lp;
 473                 pnn = (struct lpfc_name *) & ap->nodeName;
 474                 ppn = (struct lpfc_name *) & ap->portName;
 475         } else {
 476                 sp = (struct serv_parm *) lp;
 477                 pnn = (struct lpfc_name *) & sp->nodeName;
 478                 ppn = (struct lpfc_name *) & sp->portName;
 479         }
 480
 481         icmd = &cmdiocb->iocb;
 482         if (icmd->ulpStatus == 0 && lpfc_check_adisc(vport, ndlp, pnn, ppn)) {
 483                 if (cmd == ELS_CMD_ADISC) {
 484                         lpfc_els_rsp_adisc_acc(vport, cmdiocb, ndlp);
 485                 } else {
 486                         lpfc_els_rsp_acc(vport, ELS_CMD_PLOGI, cmdiocb, ndlp,
 487                                          NULL);
 488                 }
 489                 return 1;
 490         }
 491         /* Reject this request because invalid parameters */
 492         stat.un.b.lsRjtRsvd0 = 0;
 493         stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
 494         stat.un.b.lsRjtRsnCodeExp = LSEXP_SPARM_OPTIONS;
 495         stat.un.b.vendorUnique = 0;
 496         lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
 497
 498         /* 1 sec timeout */
 499         mod_timer(&ndlp->nlp_delayfunc, jiffies + HZ);
 500
 501         spin_lock_irq(shost->host_lock);
 502         ndlp->nlp_flag |= NLP_DELAY_TMO;
 503         spin_unlock_irq(shost->host_lock);
 504         ndlp->nlp_last_elscmd = ELS_CMD_PLOGI;
 505         ndlp->nlp_prev_state = ndlp->nlp_state;
 506         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
 507         return 0;
 508 }
 509
 510 static int
 511 lpfc_rcv_logo(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 512               struct lpfc_iocbq *cmdiocb, uint32_t els_cmd)
 513 {
 514         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
 515         struct lpfc_hba    *phba = vport->phba;
 516         struct lpfc_vport **vports;
 517         int i, active_vlink_present = 0 ;
 518
 519         /* Put ndlp in NPR state with 1 sec timeout for plogi, ACC logo */
 520         /* Only call LOGO ACC for first LOGO, this avoids sending unnecessary
 521          * PLOGIs during LOGO storms from a device.
 522          */
 523         spin_lock_irq(shost->host_lock);
 524         ndlp->nlp_flag |= NLP_LOGO_ACC;
 525         spin_unlock_irq(shost->host_lock);
 526         if (els_cmd == ELS_CMD_PRLO)
 527                 lpfc_els_rsp_acc(vport, ELS_CMD_PRLO, cmdiocb, ndlp, NULL);
 528         else
 529                 lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
 530         if (ndlp->nlp_DID == Fabric_DID) {
 531                 if (vport->port_state <= LPFC_FDISC)
 532                         goto out;
 533                 lpfc_linkdown_port(vport);
 534                 spin_lock_irq(shost->host_lock);
 535                 vport->fc_flag |= FC_VPORT_LOGO_RCVD;
 536                 spin_unlock_irq(shost->host_lock);
 537                 vports = lpfc_create_vport_work_array(phba);
 538                 if (vports) {
 539                         for (i = 0; i <= phba->max_vports && vports[i] != NULL;
 540                                         i++) {
 541                                 if ((!(vports[i]->fc_flag &
 542                                         FC_VPORT_LOGO_RCVD)) &&
 543                                         (vports[i]->port_state > LPFC_FDISC)) {
 544                                         active_vlink_present = 1;
 545                                         break;
 546                                 }
 547                         }
 548                         lpfc_destroy_vport_work_array(phba, vports);
 549                 }
 550
 551                 if (active_vlink_present) {
 552                         /*
 553                          * If there are other active VLinks present,
 554                          * re-instantiate the Vlink using FDISC.
 555                          */
 556                         mod_timer(&ndlp->nlp_delayfunc, jiffies + HZ);
 557                         spin_lock_irq(shost->host_lock);
 558                         ndlp->nlp_flag |= NLP_DELAY_TMO;
 559                         spin_unlock_irq(shost->host_lock);
 560                         ndlp->nlp_last_elscmd = ELS_CMD_FDISC;
 561                         vport->port_state = LPFC_FDISC;
 562                 } else {
 563                         spin_lock_irq(shost->host_lock);
 564                         phba->pport->fc_flag &= ~FC_LOGO_RCVD_DID_CHNG;
 565                         spin_unlock_irq(shost->host_lock);
 566                         lpfc_retry_pport_discovery(phba);
 567                 }
 568         } else if ((!(ndlp->nlp_type & NLP_FABRIC) &&
 569                 ((ndlp->nlp_type & NLP_FCP_TARGET) ||
 570                 !(ndlp->nlp_type & NLP_FCP_INITIATOR))) ||
 571                 (ndlp->nlp_state == NLP_STE_ADISC_ISSUE)) {
 572                 /* Only try to re-login if this is NOT a Fabric Node */
 573                 mod_timer(&ndlp->nlp_delayfunc, jiffies + HZ * 1);
 574                 spin_lock_irq(shost->host_lock);
 575                 ndlp->nlp_flag |= NLP_DELAY_TMO;
 576                 spin_unlock_irq(shost->host_lock);
 577
 578                 ndlp->nlp_last_elscmd = ELS_CMD_PLOGI;
 579         }
 580 out:
 581         ndlp->nlp_prev_state = ndlp->nlp_state;
 582         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
 583
 584         spin_lock_irq(shost->host_lock);
 585         ndlp->nlp_flag &= ~NLP_NPR_ADISC;
 586         spin_unlock_irq(shost->host_lock);
 587         /* The driver has to wait until the ACC completes before it continues
 588          * processing the LOGO.  The action will resume in
 589          * lpfc_cmpl_els_logo_acc routine. Since part of processing includes an
 590          * unreg_login, the driver waits so the ACC does not get aborted.
 591          */
 592         return 0;
 593 }
 594
 595 static void
 596 lpfc_rcv_prli(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 597               struct lpfc_iocbq *cmdiocb)
 598 {
 599         struct lpfc_dmabuf *pcmd;
 600         uint32_t *lp;
 601         PRLI *npr;
 602         struct fc_rport *rport = ndlp->rport;
 603         u32 roles;
 604
 605         pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
 606         lp = (uint32_t *) pcmd->virt;
 607         npr = (PRLI *) ((uint8_t *) lp + sizeof (uint32_t));
 608
 609         ndlp->nlp_type &= ~(NLP_FCP_TARGET | NLP_FCP_INITIATOR);
 610         ndlp->nlp_fcp_info &= ~NLP_FCP_2_DEVICE;
 611         if (npr->prliType == PRLI_FCP_TYPE) {
 612                 if (npr->initiatorFunc)
 613                         ndlp->nlp_type |= NLP_FCP_INITIATOR;
 614                 if (npr->targetFunc)
 615                         ndlp->nlp_type |= NLP_FCP_TARGET;
 616                 if (npr->Retry)
 617                         ndlp->nlp_fcp_info |= NLP_FCP_2_DEVICE;
 618         }
 619         if (rport) {
 620                 /* We need to update the rport role values */
 621                 roles = FC_RPORT_ROLE_UNKNOWN;
 622                 if (ndlp->nlp_type & NLP_FCP_INITIATOR)
 623                         roles |= FC_RPORT_ROLE_FCP_INITIATOR;
 624                 if (ndlp->nlp_type & NLP_FCP_TARGET)
 625                         roles |= FC_RPORT_ROLE_FCP_TARGET;
 626
 627                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_RPORT,
 628                         "rport rolechg:   role:x%x did:x%x flg:x%x",
 629                         roles, ndlp->nlp_DID, ndlp->nlp_flag);
 630
 631                 fc_remote_port_rolechg(rport, roles);
 632         }
 633 }
 634
 635 static uint32_t
 636 lpfc_disc_set_adisc(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
 637 {
 638         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
 639
 640         if (!(ndlp->nlp_flag & NLP_RPI_REGISTERED)) {
 641                 ndlp->nlp_flag &= ~NLP_NPR_ADISC;
 642                 return 0;
 643         }
 644
 645         if (!(vport->fc_flag & FC_PT2PT)) {
 646                 /* Check config parameter use-adisc or FCP-2 */
 647                 if ((vport->cfg_use_adisc && (vport->fc_flag & FC_RSCN_MODE)) ||
 648                     ((ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) &&
 649                      (ndlp->nlp_type & NLP_FCP_TARGET))) {
 650                         spin_lock_irq(shost->host_lock);
 651                         ndlp->nlp_flag |= NLP_NPR_ADISC;
 652                         spin_unlock_irq(shost->host_lock);
 653                         return 1;
 654                 }
 655         }
 656         ndlp->nlp_flag &= ~NLP_NPR_ADISC;
 657         lpfc_unreg_rpi(vport, ndlp);
 658         return 0;
 659 }
 660 /**
 661  * lpfc_release_rpi - Release a RPI by issuing unreg_login mailbox cmd.
 662  * @phba : Pointer to lpfc_hba structure.
 663  * @vport: Pointer to lpfc_vport structure.
 664  * @rpi  : rpi to be release.
 665  *
 666  * This function will send a unreg_login mailbox command to the firmware
 667  * to release a rpi.
 668  **/
 669 void
 670 lpfc_release_rpi(struct lpfc_hba *phba,
 671                 struct lpfc_vport *vport,
 672                 uint16_t rpi)
 673 {
 674         LPFC_MBOXQ_t *pmb;
 675         int rc;
 676
 677         pmb = (LPFC_MBOXQ_t *) mempool_alloc(phba->mbox_mem_pool,
 678                         GFP_KERNEL);
 679         if (!pmb)
 680                 lpfc_printf_vlog(vport, KERN_ERR, LOG_MBOX,
 681                         "2796 mailbox memory allocation failed \n");
 682         else {
 683                 lpfc_unreg_login(phba, vport->vpi, rpi, pmb);
 684                 pmb->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
 685                 rc = lpfc_sli_issue_mbox(phba, pmb, MBX_NOWAIT);
 686                 if (rc == MBX_NOT_FINISHED)
 687                         mempool_free(pmb, phba->mbox_mem_pool);
 688         }
 689 }
 690
 691 static uint32_t
 692 lpfc_disc_illegal(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 693                   void *arg, uint32_t evt)
 694 {
 695         struct lpfc_hba *phba;
 696         LPFC_MBOXQ_t *pmb = (LPFC_MBOXQ_t *) arg;
 697         MAILBOX_t *mb;
 698         uint16_t rpi;
 699
 700         phba = vport->phba;
 701         /* Release the RPI if reglogin completing */
 702         if (!(phba->pport->load_flag & FC_UNLOADING) &&
 703                 (evt == NLP_EVT_CMPL_REG_LOGIN) &&
 704                 (!pmb->u.mb.mbxStatus)) {
 705                 mb = &pmb->u.mb;
 706                 rpi = pmb->u.mb.un.varWords[0];
 707                 lpfc_release_rpi(phba, vport, rpi);
 708         }
 709         lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
 710                          "0271 Illegal State Transition: node x%x "
 711                          "event x%x, state x%x Data: x%x x%x\n",
 712                          ndlp->nlp_DID, evt, ndlp->nlp_state, ndlp->nlp_rpi,
 713                          ndlp->nlp_flag);
 714         return ndlp->nlp_state;
 715 }
 716
 717 static uint32_t
 718 lpfc_cmpl_plogi_illegal(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 719                   void *arg, uint32_t evt)
 720 {
 721         /* This transition is only legal if we previously
 722          * rcv'ed a PLOGI. Since we don't want 2 discovery threads
 723          * working on the same NPortID, do nothing for this thread
 724          * to stop it.
 725          */
 726         if (!(ndlp->nlp_flag & NLP_RCV_PLOGI)) {
 727                 lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
 728                          "0272 Illegal State Transition: node x%x "
 729                          "event x%x, state x%x Data: x%x x%x\n",
 730                          ndlp->nlp_DID, evt, ndlp->nlp_state, ndlp->nlp_rpi,
 731                          ndlp->nlp_flag);
 732         }
 733         return ndlp->nlp_state;
 734 }
 735
 736 /* Start of Discovery State Machine routines */
 737
 738 static uint32_t
 739 lpfc_rcv_plogi_unused_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 740                            void *arg, uint32_t evt)
 741 {
 742         struct lpfc_iocbq *cmdiocb;
 743
 744         cmdiocb = (struct lpfc_iocbq *) arg;
 745
 746         if (lpfc_rcv_plogi(vport, ndlp, cmdiocb)) {
 747                 return ndlp->nlp_state;
 748         }
 749         return NLP_STE_FREED_NODE;
 750 }
 751
 752 static uint32_t
 753 lpfc_rcv_els_unused_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 754                          void *arg, uint32_t evt)
 755 {
 756         lpfc_issue_els_logo(vport, ndlp, 0);
 757         return ndlp->nlp_state;
 758 }
 759
 760 static uint32_t
 761 lpfc_rcv_logo_unused_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 762                           void *arg, uint32_t evt)
 763 {
 764         struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
 765         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
 766
 767         spin_lock_irq(shost->host_lock);
 768         ndlp->nlp_flag |= NLP_LOGO_ACC;
 769         spin_unlock_irq(shost->host_lock);
 770         lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
 771
 772         return ndlp->nlp_state;
 773 }
 774
 775 static uint32_t
 776 lpfc_cmpl_logo_unused_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 777                            void *arg, uint32_t evt)
 778 {
 779         return NLP_STE_FREED_NODE;
 780 }
 781
 782 static uint32_t
 783 lpfc_device_rm_unused_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 784                            void *arg, uint32_t evt)
 785 {
 786         return NLP_STE_FREED_NODE;
 787 }
 788
 789 static uint32_t
 790 lpfc_rcv_plogi_plogi_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 791                            void *arg, uint32_t evt)
 792 {
 793         struct Scsi_Host   *shost = lpfc_shost_from_vport(vport);
 794         struct lpfc_hba   *phba = vport->phba;
 795         struct lpfc_iocbq *cmdiocb = arg;
 796         struct lpfc_dmabuf *pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
 797         uint32_t *lp = (uint32_t *) pcmd->virt;
 798         struct serv_parm *sp = (struct serv_parm *) (lp + 1);
 799         struct ls_rjt stat;
 800         int port_cmp;
 801
 802         memset(&stat, 0, sizeof (struct ls_rjt));
 803
 804         /* For a PLOGI, we only accept if our portname is less
 805          * than the remote portname.
 806          */
 807         phba->fc_stat.elsLogiCol++;
 808         port_cmp = memcmp(&vport->fc_portname, &sp->portName,
 809                           sizeof(struct lpfc_name));
 810
 811         if (port_cmp >= 0) {
 812                 /* Reject this request because the remote node will accept
 813                    ours */
 814                 stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
 815                 stat.un.b.lsRjtRsnCodeExp = LSEXP_CMD_IN_PROGRESS;
 816                 lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp,
 817                         NULL);
 818         } else {
 819                 if (lpfc_rcv_plogi(vport, ndlp, cmdiocb) &&
 820                     (ndlp->nlp_flag & NLP_NPR_2B_DISC) &&
 821                     (vport->num_disc_nodes)) {
 822                         spin_lock_irq(shost->host_lock);
 823                         ndlp->nlp_flag &= ~NLP_NPR_2B_DISC;
 824                         spin_unlock_irq(shost->host_lock);
 825                         /* Check if there are more PLOGIs to be sent */
 826                         lpfc_more_plogi(vport);
 827                         if (vport->num_disc_nodes == 0) {
 828                                 spin_lock_irq(shost->host_lock);
 829                                 vport->fc_flag &= ~FC_NDISC_ACTIVE;
 830                                 spin_unlock_irq(shost->host_lock);
 831                                 lpfc_can_disctmo(vport);
 832                                 lpfc_end_rscn(vport);
 833                         }
 834                 }
 835         } /* If our portname was less */
 836
 837         return ndlp->nlp_state;
 838 }
 839
 840 static uint32_t
 841 lpfc_rcv_prli_plogi_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 842                           void *arg, uint32_t evt)
 843 {
 844         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
 845         struct ls_rjt     stat;
 846
 847         memset(&stat, 0, sizeof (struct ls_rjt));
 848         stat.un.b.lsRjtRsnCode = LSRJT_LOGICAL_BSY;
 849         stat.un.b.lsRjtRsnCodeExp = LSEXP_NOTHING_MORE;
 850         lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
 851         return ndlp->nlp_state;
 852 }
 853
 854 static uint32_t
 855 lpfc_rcv_logo_plogi_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 856                           void *arg, uint32_t evt)
 857 {
 858         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
 859
 860                                 /* software abort outstanding PLOGI */
 861         lpfc_els_abort(vport->phba, ndlp);
 862
 863         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_LOGO);
 864         return ndlp->nlp_state;
 865 }
 866
 867 static uint32_t
 868 lpfc_rcv_els_plogi_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 869                          void *arg, uint32_t evt)
 870 {
 871         struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
 872         struct lpfc_hba   *phba = vport->phba;
 873         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
 874
 875         /* software abort outstanding PLOGI */
 876         lpfc_els_abort(phba, ndlp);
 877
 878         if (evt == NLP_EVT_RCV_LOGO) {
 879                 lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
 880         } else {
 881                 lpfc_issue_els_logo(vport, ndlp, 0);
 882         }
 883
 884         /* Put ndlp in npr state set plogi timer for 1 sec */
 885         mod_timer(&ndlp->nlp_delayfunc, jiffies + HZ * 1);
 886         spin_lock_irq(shost->host_lock);
 887         ndlp->nlp_flag |= NLP_DELAY_TMO;
 888         spin_unlock_irq(shost->host_lock);
 889         ndlp->nlp_last_elscmd = ELS_CMD_PLOGI;
 890         ndlp->nlp_prev_state = NLP_STE_PLOGI_ISSUE;
 891         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
 892
 893         return ndlp->nlp_state;
 894 }
 895
 896 static uint32_t
 897 lpfc_cmpl_plogi_plogi_issue(struct lpfc_vport *vport,
 898                             struct lpfc_nodelist *ndlp,
 899                             void *arg,
 900                             uint32_t evt)
 901 {
 902         struct lpfc_hba    *phba = vport->phba;
 903         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
 904         struct lpfc_iocbq  *cmdiocb, *rspiocb;
 905         struct lpfc_dmabuf *pcmd, *prsp, *mp;
 906         uint32_t *lp;
 907         IOCB_t *irsp;
 908         struct serv_parm *sp;
 909         LPFC_MBOXQ_t *mbox;
 910
 911         cmdiocb = (struct lpfc_iocbq *) arg;
 912         rspiocb = cmdiocb->context_un.rsp_iocb;
 913
 914         if (ndlp->nlp_flag & NLP_ACC_REGLOGIN) {
 915                 /* Recovery from PLOGI collision logic */
 916                 return ndlp->nlp_state;
 917         }
 918
 919         irsp = &rspiocb->iocb;
 920
 921         if (irsp->ulpStatus)
 922                 goto out;
 923
 924         pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
 925
 926         prsp = list_get_first(&pcmd->list, struct lpfc_dmabuf, list);
 927
 928         lp = (uint32_t *) prsp->virt;
 929         sp = (struct serv_parm *) ((uint8_t *) lp + sizeof (uint32_t));
 930
 931         /* Some switches have FDMI servers returning 0 for WWN */
 932         if ((ndlp->nlp_DID != FDMI_DID) &&
 933                 (wwn_to_u64(sp->portName.u.wwn) == 0 ||
 934                 wwn_to_u64(sp->nodeName.u.wwn) == 0)) {
 935                 lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
 936                                  "0142 PLOGI RSP: Invalid WWN.\n");
 937                 goto out;
 938         }
 939         if (!lpfc_check_sparm(vport, ndlp, sp, CLASS3, 0))
 940                 goto out;
 941         /* PLOGI chkparm OK */
 942         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
 943                          "0121 PLOGI chkparm OK Data: x%x x%x x%x x%x\n",
 944                          ndlp->nlp_DID, ndlp->nlp_state,
 945                          ndlp->nlp_flag, ndlp->nlp_rpi);
 946         if (vport->cfg_fcp_class == 2 && (sp->cls2.classValid))
 947                 ndlp->nlp_fcp_info |= CLASS2;
 948         else
 949                 ndlp->nlp_fcp_info |= CLASS3;
 950
 951         ndlp->nlp_class_sup = 0;
 952         if (sp->cls1.classValid)
 953                 ndlp->nlp_class_sup |= FC_COS_CLASS1;
 954         if (sp->cls2.classValid)
 955                 ndlp->nlp_class_sup |= FC_COS_CLASS2;
 956         if (sp->cls3.classValid)
 957                 ndlp->nlp_class_sup |= FC_COS_CLASS3;
 958         if (sp->cls4.classValid)
 959                 ndlp->nlp_class_sup |= FC_COS_CLASS4;
 960         ndlp->nlp_maxframe =
 961                 ((sp->cmn.bbRcvSizeMsb & 0x0F) << 8) | sp->cmn.bbRcvSizeLsb;
 962
 963         mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
 964         if (!mbox) {
 965                 lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
 966                         "0133 PLOGI: no memory for reg_login "
 967                         "Data: x%x x%x x%x x%x\n",
 968                         ndlp->nlp_DID, ndlp->nlp_state,
 969                         ndlp->nlp_flag, ndlp->nlp_rpi);
 970                 goto out;
 971         }
 972
 973         lpfc_unreg_rpi(vport, ndlp);
 974
 975         if (lpfc_reg_rpi(phba, vport->vpi, irsp->un.elsreq64.remoteID,
 976                          (uint8_t *) sp, mbox, ndlp->nlp_rpi) == 0) {
 977                 switch (ndlp->nlp_DID) {
 978                 case NameServer_DID:
 979                         mbox->mbox_cmpl = lpfc_mbx_cmpl_ns_reg_login;
 980                         break;
 981                 case FDMI_DID:
 982                         mbox->mbox_cmpl = lpfc_mbx_cmpl_fdmi_reg_login;
 983                         break;
 984                 default:
 985                         ndlp->nlp_flag |= NLP_REG_LOGIN_SEND;
 986                         mbox->mbox_cmpl = lpfc_mbx_cmpl_reg_login;
 987                 }
 988                 mbox->context2 = lpfc_nlp_get(ndlp);
 989                 mbox->vport = vport;
 990                 if (lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT)
 991                     != MBX_NOT_FINISHED) {
 992                         lpfc_nlp_set_state(vport, ndlp,
 993                                            NLP_STE_REG_LOGIN_ISSUE);
 994                         return ndlp->nlp_state;
 995                 }
 996                 if (ndlp->nlp_flag & NLP_REG_LOGIN_SEND)
 997                         ndlp->nlp_flag &= ~NLP_REG_LOGIN_SEND;
 998                 /* decrement node reference count to the failed mbox
 999                  * command
1000                  */
1001                 lpfc_nlp_put(ndlp);
1002                 mp = (struct lpfc_dmabuf *) mbox->context1;
1003                 lpfc_mbuf_free(phba, mp->virt, mp->phys);
1004                 kfree(mp);
1005                 mempool_free(mbox, phba->mbox_mem_pool);
1006
1007                 lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
1008                                  "0134 PLOGI: cannot issue reg_login "
1009                                  "Data: x%x x%x x%x x%x\n",
1010                                  ndlp->nlp_DID, ndlp->nlp_state,
1011                                  ndlp->nlp_flag, ndlp->nlp_rpi);
1012         } else {
1013                 mempool_free(mbox, phba->mbox_mem_pool);
1014
1015                 lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
1016                                  "0135 PLOGI: cannot format reg_login "
1017                                  "Data: x%x x%x x%x x%x\n",
1018                                  ndlp->nlp_DID, ndlp->nlp_state,
1019                                  ndlp->nlp_flag, ndlp->nlp_rpi);
1020         }
1021
1022
1023 out:
1024         if (ndlp->nlp_DID == NameServer_DID) {
1025                 lpfc_vport_set_state(vport, FC_VPORT_FAILED);
1026                 lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
1027                                  "0261 Cannot Register NameServer login\n");
1028         }
1029
1030         spin_lock_irq(shost->host_lock);
1031         ndlp->nlp_flag |= NLP_DEFER_RM;
1032         spin_unlock_irq(shost->host_lock);
1033         return NLP_STE_FREED_NODE;
1034 }
1035
1036 static uint32_t
1037 lpfc_cmpl_logo_plogi_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1038                            void *arg, uint32_t evt)
1039 {
1040         return ndlp->nlp_state;
1041 }
1042
1043 static uint32_t
1044 lpfc_cmpl_reglogin_plogi_issue(struct lpfc_vport *vport,
1045         struct lpfc_nodelist *ndlp, void *arg, uint32_t evt)
1046 {
1047         struct lpfc_hba *phba;
1048         LPFC_MBOXQ_t *pmb = (LPFC_MBOXQ_t *) arg;
1049         MAILBOX_t *mb = &pmb->u.mb;
1050         uint16_t rpi;
1051
1052         phba = vport->phba;
1053         /* Release the RPI */
1054         if (!(phba->pport->load_flag & FC_UNLOADING) &&
1055                 !mb->mbxStatus) {
1056                 rpi = pmb->u.mb.un.varWords[0];
1057                 lpfc_release_rpi(phba, vport, rpi);
1058         }
1059         return ndlp->nlp_state;
1060 }
1061
1062 static uint32_t
1063 lpfc_device_rm_plogi_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1064                            void *arg, uint32_t evt)
1065 {
1066         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1067
1068         if (ndlp->nlp_flag & NLP_NPR_2B_DISC) {
1069                 spin_lock_irq(shost->host_lock);
1070                 ndlp->nlp_flag |= NLP_NODEV_REMOVE;
1071                 spin_unlock_irq(shost->host_lock);
1072                 return ndlp->nlp_state;
1073         } else {
1074                 /* software abort outstanding PLOGI */
1075                 lpfc_els_abort(vport->phba, ndlp);
1076
1077                 lpfc_drop_node(vport, ndlp);
1078                 return NLP_STE_FREED_NODE;
1079         }
1080 }
1081
1082 static uint32_t
1083 lpfc_device_recov_plogi_issue(struct lpfc_vport *vport,
1084                               struct lpfc_nodelist *ndlp,
1085                               void *arg,
1086                               uint32_t evt)
1087 {
1088         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1089         struct lpfc_hba  *phba = vport->phba;
1090
1091         /* Don't do anything that will mess up processing of the
1092          * previous RSCN.
1093          */
1094         if (vport->fc_flag & FC_RSCN_DEFERRED)
1095                 return ndlp->nlp_state;
1096
1097         /* software abort outstanding PLOGI */
1098         lpfc_els_abort(phba, ndlp);
1099
1100         ndlp->nlp_prev_state = NLP_STE_PLOGI_ISSUE;
1101         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1102         spin_lock_irq(shost->host_lock);
1103         ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
1104         spin_unlock_irq(shost->host_lock);
1105
1106         return ndlp->nlp_state;
1107 }
1108
1109 static uint32_t
1110 lpfc_rcv_plogi_adisc_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1111                            void *arg, uint32_t evt)
1112 {
1113         struct Scsi_Host   *shost = lpfc_shost_from_vport(vport);
1114         struct lpfc_hba   *phba = vport->phba;
1115         struct lpfc_iocbq *cmdiocb;
1116
1117         /* software abort outstanding ADISC */
1118         lpfc_els_abort(phba, ndlp);
1119
1120         cmdiocb = (struct lpfc_iocbq *) arg;
1121
1122         if (lpfc_rcv_plogi(vport, ndlp, cmdiocb)) {
1123                 if (ndlp->nlp_flag & NLP_NPR_2B_DISC) {
1124                         spin_lock_irq(shost->host_lock);
1125                         ndlp->nlp_flag &= ~NLP_NPR_2B_DISC;
1126                         spin_unlock_irq(shost->host_lock);
1127                         if (vport->num_disc_nodes)
1128                                 lpfc_more_adisc(vport);
1129                 }
1130                 return ndlp->nlp_state;
1131         }
1132         ndlp->nlp_prev_state = NLP_STE_ADISC_ISSUE;
1133         lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0);
1134         lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
1135
1136         return ndlp->nlp_state;
1137 }
1138
1139 static uint32_t
1140 lpfc_rcv_prli_adisc_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1141                           void *arg, uint32_t evt)
1142 {
1143         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1144
1145         lpfc_els_rsp_prli_acc(vport, cmdiocb, ndlp);
1146         return ndlp->nlp_state;
1147 }
1148
1149 static uint32_t
1150 lpfc_rcv_logo_adisc_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1151                           void *arg, uint32_t evt)
1152 {
1153         struct lpfc_hba *phba = vport->phba;
1154         struct lpfc_iocbq *cmdiocb;
1155
1156         cmdiocb = (struct lpfc_iocbq *) arg;
1157
1158         /* software abort outstanding ADISC */
1159         lpfc_els_abort(phba, ndlp);
1160
1161         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_LOGO);
1162         return ndlp->nlp_state;
1163 }
1164
1165 static uint32_t
1166 lpfc_rcv_padisc_adisc_issue(struct lpfc_vport *vport,
1167                             struct lpfc_nodelist *ndlp,
1168                             void *arg, uint32_t evt)
1169 {
1170         struct lpfc_iocbq *cmdiocb;
1171
1172         cmdiocb = (struct lpfc_iocbq *) arg;
1173
1174         lpfc_rcv_padisc(vport, ndlp, cmdiocb);
1175         return ndlp->nlp_state;
1176 }
1177
1178 static uint32_t
1179 lpfc_rcv_prlo_adisc_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1180                           void *arg, uint32_t evt)
1181 {
1182         struct lpfc_iocbq *cmdiocb;
1183
1184         cmdiocb = (struct lpfc_iocbq *) arg;
1185
1186         /* Treat like rcv logo */
1187         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_PRLO);
1188         return ndlp->nlp_state;
1189 }
1190
1191 static uint32_t
1192 lpfc_cmpl_adisc_adisc_issue(struct lpfc_vport *vport,
1193                             struct lpfc_nodelist *ndlp,
1194                             void *arg, uint32_t evt)
1195 {
1196         struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
1197         struct lpfc_hba   *phba = vport->phba;
1198         struct lpfc_iocbq *cmdiocb, *rspiocb;
1199         IOCB_t *irsp;
1200         ADISC *ap;
1201         int rc;
1202
1203         cmdiocb = (struct lpfc_iocbq *) arg;
1204         rspiocb = cmdiocb->context_un.rsp_iocb;
1205
1206         ap = (ADISC *)lpfc_check_elscmpl_iocb(phba, cmdiocb, rspiocb);
1207         irsp = &rspiocb->iocb;
1208
1209         if ((irsp->ulpStatus) ||
1210             (!lpfc_check_adisc(vport, ndlp, &ap->nodeName, &ap->portName))) {
1211                 /* 1 sec timeout */
1212                 mod_timer(&ndlp->nlp_delayfunc, jiffies + HZ);
1213                 spin_lock_irq(shost->host_lock);
1214                 ndlp->nlp_flag |= NLP_DELAY_TMO;
1215                 spin_unlock_irq(shost->host_lock);
1216                 ndlp->nlp_last_elscmd = ELS_CMD_PLOGI;
1217
1218                 memset(&ndlp->nlp_nodename, 0, sizeof(struct lpfc_name));
1219                 memset(&ndlp->nlp_portname, 0, sizeof(struct lpfc_name));
1220
1221                 ndlp->nlp_prev_state = NLP_STE_ADISC_ISSUE;
1222                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1223                 lpfc_unreg_rpi(vport, ndlp);
1224                 return ndlp->nlp_state;
1225         }
1226
1227         if (phba->sli_rev == LPFC_SLI_REV4) {
1228                 rc = lpfc_sli4_resume_rpi(ndlp);
1229                 if (rc) {
1230                         /* Stay in state and retry. */
1231                         ndlp->nlp_prev_state = NLP_STE_ADISC_ISSUE;
1232                         return ndlp->nlp_state;
1233                 }
1234         }
1235
1236         if (ndlp->nlp_type & NLP_FCP_TARGET) {
1237                 ndlp->nlp_prev_state = NLP_STE_ADISC_ISSUE;
1238                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_MAPPED_NODE);
1239         } else {
1240                 ndlp->nlp_prev_state = NLP_STE_ADISC_ISSUE;
1241                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
1242         }
1243
1244         return ndlp->nlp_state;
1245 }
1246
1247 static uint32_t
1248 lpfc_device_rm_adisc_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1249                            void *arg, uint32_t evt)
1250 {
1251         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1252
1253         if (ndlp->nlp_flag & NLP_NPR_2B_DISC) {
1254                 spin_lock_irq(shost->host_lock);
1255                 ndlp->nlp_flag |= NLP_NODEV_REMOVE;
1256                 spin_unlock_irq(shost->host_lock);
1257                 return ndlp->nlp_state;
1258         } else {
1259                 /* software abort outstanding ADISC */
1260                 lpfc_els_abort(vport->phba, ndlp);
1261
1262                 lpfc_drop_node(vport, ndlp);
1263                 return NLP_STE_FREED_NODE;
1264         }
1265 }
1266
1267 static uint32_t
1268 lpfc_device_recov_adisc_issue(struct lpfc_vport *vport,
1269                               struct lpfc_nodelist *ndlp,
1270                               void *arg,
1271                               uint32_t evt)
1272 {
1273         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1274         struct lpfc_hba  *phba = vport->phba;
1275
1276         /* Don't do anything that will mess up processing of the
1277          * previous RSCN.
1278          */
1279         if (vport->fc_flag & FC_RSCN_DEFERRED)
1280                 return ndlp->nlp_state;
1281
1282         /* software abort outstanding ADISC */
1283         lpfc_els_abort(phba, ndlp);
1284
1285         ndlp->nlp_prev_state = NLP_STE_ADISC_ISSUE;
1286         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1287         spin_lock_irq(shost->host_lock);
1288         ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
1289         spin_unlock_irq(shost->host_lock);
1290         lpfc_disc_set_adisc(vport, ndlp);
1291         return ndlp->nlp_state;
1292 }
1293
1294 static uint32_t
1295 lpfc_rcv_plogi_reglogin_issue(struct lpfc_vport *vport,
1296                               struct lpfc_nodelist *ndlp,
1297                               void *arg,
1298                               uint32_t evt)
1299 {
1300         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1301
1302         lpfc_rcv_plogi(vport, ndlp, cmdiocb);
1303         return ndlp->nlp_state;
1304 }
1305
1306 static uint32_t
1307 lpfc_rcv_prli_reglogin_issue(struct lpfc_vport *vport,
1308                              struct lpfc_nodelist *ndlp,
1309                              void *arg,
1310                              uint32_t evt)
1311 {
1312         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1313
1314         lpfc_els_rsp_prli_acc(vport, cmdiocb, ndlp);
1315         return ndlp->nlp_state;
1316 }
1317
1318 static uint32_t
1319 lpfc_rcv_logo_reglogin_issue(struct lpfc_vport *vport,
1320                              struct lpfc_nodelist *ndlp,
1321                              void *arg,
1322                              uint32_t evt)
1323 {
1324         struct lpfc_hba   *phba = vport->phba;
1325         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1326         LPFC_MBOXQ_t      *mb;
1327         LPFC_MBOXQ_t      *nextmb;
1328         struct lpfc_dmabuf *mp;
1329
1330         cmdiocb = (struct lpfc_iocbq *) arg;
1331
1332         /* cleanup any ndlp on mbox q waiting for reglogin cmpl */
1333         if ((mb = phba->sli.mbox_active)) {
1334                 if ((mb->u.mb.mbxCommand == MBX_REG_LOGIN64) &&
1335                    (ndlp == (struct lpfc_nodelist *) mb->context2)) {
1336                         lpfc_nlp_put(ndlp);
1337                         mb->context2 = NULL;
1338                         mb->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
1339                 }
1340         }
1341
1342         spin_lock_irq(&phba->hbalock);
1343         list_for_each_entry_safe(mb, nextmb, &phba->sli.mboxq, list) {
1344                 if ((mb->u.mb.mbxCommand == MBX_REG_LOGIN64) &&
1345                    (ndlp == (struct lpfc_nodelist *) mb->context2)) {
1346                         mp = (struct lpfc_dmabuf *) (mb->context1);
1347                         if (mp) {
1348                                 __lpfc_mbuf_free(phba, mp->virt, mp->phys);
1349                                 kfree(mp);
1350                         }
1351                         lpfc_nlp_put(ndlp);
1352                         list_del(&mb->list);
1353                         phba->sli.mboxq_cnt--;
1354                         mempool_free(mb, phba->mbox_mem_pool);
1355                 }
1356         }
1357         spin_unlock_irq(&phba->hbalock);
1358
1359         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_LOGO);
1360         return ndlp->nlp_state;
1361 }
1362
1363 static uint32_t
1364 lpfc_rcv_padisc_reglogin_issue(struct lpfc_vport *vport,
1365                                struct lpfc_nodelist *ndlp,
1366                                void *arg,
1367                                uint32_t evt)
1368 {
1369         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1370
1371         lpfc_rcv_padisc(vport, ndlp, cmdiocb);
1372         return ndlp->nlp_state;
1373 }
1374
1375 static uint32_t
1376 lpfc_rcv_prlo_reglogin_issue(struct lpfc_vport *vport,
1377                              struct lpfc_nodelist *ndlp,
1378                              void *arg,
1379                              uint32_t evt)
1380 {
1381         struct lpfc_iocbq *cmdiocb;
1382
1383         cmdiocb = (struct lpfc_iocbq *) arg;
1384         lpfc_els_rsp_acc(vport, ELS_CMD_PRLO, cmdiocb, ndlp, NULL);
1385         return ndlp->nlp_state;
1386 }
1387
1388 static uint32_t
1389 lpfc_cmpl_reglogin_reglogin_issue(struct lpfc_vport *vport,
1390                                   struct lpfc_nodelist *ndlp,
1391                                   void *arg,
1392                                   uint32_t evt)
1393 {
1394         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1395         LPFC_MBOXQ_t *pmb = (LPFC_MBOXQ_t *) arg;
1396         MAILBOX_t *mb = &pmb->u.mb;
1397         uint32_t did  = mb->un.varWords[1];
1398
1399         if (mb->mbxStatus) {
1400                 /* RegLogin failed */
1401                 lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
1402                                 "0246 RegLogin failed Data: x%x x%x x%x\n",
1403                                 did, mb->mbxStatus, vport->port_state);
1404                 /*
1405                  * If RegLogin failed due to lack of HBA resources do not
1406                  * retry discovery.
1407                  */
1408                 if (mb->mbxStatus == MBXERR_RPI_FULL) {
1409                         ndlp->nlp_prev_state = NLP_STE_REG_LOGIN_ISSUE;
1410                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1411                         return ndlp->nlp_state;
1412                 }
1413
1414                 /* Put ndlp in npr state set plogi timer for 1 sec */
1415                 mod_timer(&ndlp->nlp_delayfunc, jiffies + HZ * 1);
1416                 spin_lock_irq(shost->host_lock);
1417                 ndlp->nlp_flag |= NLP_DELAY_TMO;
1418                 spin_unlock_irq(shost->host_lock);
1419                 ndlp->nlp_last_elscmd = ELS_CMD_PLOGI;
1420
1421                 lpfc_issue_els_logo(vport, ndlp, 0);
1422                 ndlp->nlp_prev_state = NLP_STE_REG_LOGIN_ISSUE;
1423                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1424                 return ndlp->nlp_state;
1425         }
1426
1427         ndlp->nlp_rpi = mb->un.varWords[0];
1428         ndlp->nlp_flag |= NLP_RPI_REGISTERED;
1429
1430         /* Only if we are not a fabric nport do we issue PRLI */
1431         if (!(ndlp->nlp_type & NLP_FABRIC)) {
1432                 ndlp->nlp_prev_state = NLP_STE_REG_LOGIN_ISSUE;
1433                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_PRLI_ISSUE);
1434                 lpfc_issue_els_prli(vport, ndlp, 0);
1435         } else {
1436                 ndlp->nlp_prev_state = NLP_STE_REG_LOGIN_ISSUE;
1437                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
1438         }
1439         return ndlp->nlp_state;
1440 }
1441
1442 static uint32_t
1443 lpfc_device_rm_reglogin_issue(struct lpfc_vport *vport,
1444                               struct lpfc_nodelist *ndlp,
1445                               void *arg,
1446                               uint32_t evt)
1447 {
1448         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1449
1450         if (ndlp->nlp_flag & NLP_NPR_2B_DISC) {
1451                 spin_lock_irq(shost->host_lock);
1452                 ndlp->nlp_flag |= NLP_NODEV_REMOVE;
1453                 spin_unlock_irq(shost->host_lock);
1454                 return ndlp->nlp_state;
1455         } else {
1456                 lpfc_drop_node(vport, ndlp);
1457                 return NLP_STE_FREED_NODE;
1458         }
1459 }
1460
1461 static uint32_t
1462 lpfc_device_recov_reglogin_issue(struct lpfc_vport *vport,
1463                                  struct lpfc_nodelist *ndlp,
1464                                  void *arg,
1465                                  uint32_t evt)
1466 {
1467         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1468
1469         /* Don't do anything that will mess up processing of the
1470          * previous RSCN.
1471          */
1472         if (vport->fc_flag & FC_RSCN_DEFERRED)
1473                 return ndlp->nlp_state;
1474
1475         ndlp->nlp_prev_state = NLP_STE_REG_LOGIN_ISSUE;
1476         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1477         spin_lock_irq(shost->host_lock);
1478         ndlp->nlp_flag |= NLP_IGNR_REG_CMPL;
1479         ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
1480         spin_unlock_irq(shost->host_lock);
1481         lpfc_disc_set_adisc(vport, ndlp);
1482         return ndlp->nlp_state;
1483 }
1484
1485 static uint32_t
1486 lpfc_rcv_plogi_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1487                           void *arg, uint32_t evt)
1488 {
1489         struct lpfc_iocbq *cmdiocb;
1490
1491         cmdiocb = (struct lpfc_iocbq *) arg;
1492
1493         lpfc_rcv_plogi(vport, ndlp, cmdiocb);
1494         return ndlp->nlp_state;
1495 }
1496
1497 static uint32_t
1498 lpfc_rcv_prli_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1499                          void *arg, uint32_t evt)
1500 {
1501         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1502
1503         lpfc_els_rsp_prli_acc(vport, cmdiocb, ndlp);
1504         return ndlp->nlp_state;
1505 }
1506
1507 static uint32_t
1508 lpfc_rcv_logo_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1509                          void *arg, uint32_t evt)
1510 {
1511         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1512
1513         /* Software abort outstanding PRLI before sending acc */
1514         lpfc_els_abort(vport->phba, ndlp);
1515
1516         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_LOGO);
1517         return ndlp->nlp_state;
1518 }
1519
1520 static uint32_t
1521 lpfc_rcv_padisc_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1522                            void *arg, uint32_t evt)
1523 {
1524         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1525
1526         lpfc_rcv_padisc(vport, ndlp, cmdiocb);
1527         return ndlp->nlp_state;
1528 }
1529
1530 /* This routine is envoked when we rcv a PRLO request from a nport
1531  * we are logged into.  We should send back a PRLO rsp setting the
1532  * appropriate bits.
1533  * NEXT STATE = PRLI_ISSUE
1534  */
1535 static uint32_t
1536 lpfc_rcv_prlo_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1537                          void *arg, uint32_t evt)
1538 {
1539         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1540
1541         lpfc_els_rsp_acc(vport, ELS_CMD_PRLO, cmdiocb, ndlp, NULL);
1542         return ndlp->nlp_state;
1543 }
1544
1545 static uint32_t
1546 lpfc_cmpl_prli_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1547                           void *arg, uint32_t evt)
1548 {
1549         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1550         struct lpfc_iocbq *cmdiocb, *rspiocb;
1551         struct lpfc_hba   *phba = vport->phba;
1552         IOCB_t *irsp;
1553         PRLI *npr;
1554
1555         cmdiocb = (struct lpfc_iocbq *) arg;
1556         rspiocb = cmdiocb->context_un.rsp_iocb;
1557         npr = (PRLI *)lpfc_check_elscmpl_iocb(phba, cmdiocb, rspiocb);
1558
1559         irsp = &rspiocb->iocb;
1560         if (irsp->ulpStatus) {
1561                 if ((vport->port_type == LPFC_NPIV_PORT) &&
1562                     vport->cfg_restrict_login) {
1563                         goto out;
1564                 }
1565                 ndlp->nlp_prev_state = NLP_STE_PRLI_ISSUE;
1566                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
1567                 return ndlp->nlp_state;
1568         }
1569
1570         /* Check out PRLI rsp */
1571         ndlp->nlp_type &= ~(NLP_FCP_TARGET | NLP_FCP_INITIATOR);
1572         ndlp->nlp_fcp_info &= ~NLP_FCP_2_DEVICE;
1573         if ((npr->acceptRspCode == PRLI_REQ_EXECUTED) &&
1574             (npr->prliType == PRLI_FCP_TYPE)) {
1575                 if (npr->initiatorFunc)
1576                         ndlp->nlp_type |= NLP_FCP_INITIATOR;
1577                 if (npr->targetFunc)
1578                         ndlp->nlp_type |= NLP_FCP_TARGET;
1579                 if (npr->Retry)
1580                         ndlp->nlp_fcp_info |= NLP_FCP_2_DEVICE;
1581         }
1582         if (!(ndlp->nlp_type & NLP_FCP_TARGET) &&
1583             (vport->port_type == LPFC_NPIV_PORT) &&
1584              vport->cfg_restrict_login) {
1585 out:
1586                 spin_lock_irq(shost->host_lock);
1587                 ndlp->nlp_flag |= NLP_TARGET_REMOVE;
1588                 spin_unlock_irq(shost->host_lock);
1589                 lpfc_issue_els_logo(vport, ndlp, 0);
1590
1591                 ndlp->nlp_prev_state = NLP_STE_PRLI_ISSUE;
1592                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1593                 return ndlp->nlp_state;
1594         }
1595
1596         ndlp->nlp_prev_state = NLP_STE_PRLI_ISSUE;
1597         if (ndlp->nlp_type & NLP_FCP_TARGET)
1598                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_MAPPED_NODE);
1599         else
1600                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
1601         return ndlp->nlp_state;
1602 }
1603
1604 /*! lpfc_device_rm_prli_issue
1605  *
1606  * \pre
1607  * \post
1608  * \param   phba
1609  * \param   ndlp
1610  * \param   arg
1611  * \param   evt
1612  * \return  uint32_t
1613  *
1614  * \b Description:
1615  *    This routine is envoked when we a request to remove a nport we are in the
1616  *    process of PRLIing. We should software abort outstanding prli, unreg
1617  *    login, send a logout. We will change node state to UNUSED_NODE, put it
1618  *    on plogi list so it can be freed when LOGO completes.
1619  *
1620  */
1621
1622 static uint32_t
1623 lpfc_device_rm_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1624                           void *arg, uint32_t evt)
1625 {
1626         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1627
1628         if (ndlp->nlp_flag & NLP_NPR_2B_DISC) {
1629                 spin_lock_irq(shost->host_lock);
1630                 ndlp->nlp_flag |= NLP_NODEV_REMOVE;
1631                 spin_unlock_irq(shost->host_lock);
1632                 return ndlp->nlp_state;
1633         } else {
1634                 /* software abort outstanding PLOGI */
1635                 lpfc_els_abort(vport->phba, ndlp);
1636
1637                 lpfc_drop_node(vport, ndlp);
1638                 return NLP_STE_FREED_NODE;
1639         }
1640 }
1641
1642
1643 /*! lpfc_device_recov_prli_issue
1644  *
1645  * \pre
1646  * \post
1647  * \param   phba
1648  * \param   ndlp
1649  * \param   arg
1650  * \param   evt
1651  * \return  uint32_t
1652  *
1653  * \b Description:
1654  *    The routine is envoked when the state of a device is unknown, like
1655  *    during a link down. We should remove the nodelist entry from the
1656  *    unmapped list, issue a UNREG_LOGIN, do a software abort of the
1657  *    outstanding PRLI command, then free the node entry.
1658  */
1659 static uint32_t
1660 lpfc_device_recov_prli_issue(struct lpfc_vport *vport,
1661                              struct lpfc_nodelist *ndlp,
1662                              void *arg,
1663                              uint32_t evt)
1664 {
1665         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1666         struct lpfc_hba  *phba = vport->phba;
1667
1668         /* Don't do anything that will mess up processing of the
1669          * previous RSCN.
1670          */
1671         if (vport->fc_flag & FC_RSCN_DEFERRED)
1672                 return ndlp->nlp_state;
1673
1674         /* software abort outstanding PRLI */
1675         lpfc_els_abort(phba, ndlp);
1676
1677         ndlp->nlp_prev_state = NLP_STE_PRLI_ISSUE;
1678         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1679         spin_lock_irq(shost->host_lock);
1680         ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
1681         spin_unlock_irq(shost->host_lock);
1682         lpfc_disc_set_adisc(vport, ndlp);
1683         return ndlp->nlp_state;
1684 }
1685
1686 static uint32_t
1687 lpfc_rcv_plogi_unmap_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1688                           void *arg, uint32_t evt)
1689 {
1690         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1691
1692         lpfc_rcv_plogi(vport, ndlp, cmdiocb);
1693         return ndlp->nlp_state;
1694 }
1695
1696 static uint32_t
1697 lpfc_rcv_prli_unmap_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1698                          void *arg, uint32_t evt)
1699 {
1700         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1701
1702         lpfc_rcv_prli(vport, ndlp, cmdiocb);
1703         lpfc_els_rsp_prli_acc(vport, cmdiocb, ndlp);
1704         return ndlp->nlp_state;
1705 }
1706
1707 static uint32_t
1708 lpfc_rcv_logo_unmap_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1709                          void *arg, uint32_t evt)
1710 {
1711         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1712
1713         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_LOGO);
1714         return ndlp->nlp_state;
1715 }
1716
1717 static uint32_t
1718 lpfc_rcv_padisc_unmap_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1719                            void *arg, uint32_t evt)
1720 {
1721         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1722
1723         lpfc_rcv_padisc(vport, ndlp, cmdiocb);
1724         return ndlp->nlp_state;
1725 }
1726
1727 static uint32_t
1728 lpfc_rcv_prlo_unmap_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1729                          void *arg, uint32_t evt)
1730 {
1731         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1732
1733         lpfc_els_rsp_acc(vport, ELS_CMD_PRLO, cmdiocb, ndlp, NULL);
1734         return ndlp->nlp_state;
1735 }
1736
1737 static uint32_t
1738 lpfc_device_recov_unmap_node(struct lpfc_vport *vport,
1739                              struct lpfc_nodelist *ndlp,
1740                              void *arg,
1741                              uint32_t evt)
1742 {
1743         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1744
1745         ndlp->nlp_prev_state = NLP_STE_UNMAPPED_NODE;
1746         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1747         spin_lock_irq(shost->host_lock);
1748         ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
1749         spin_unlock_irq(shost->host_lock);
1750         lpfc_disc_set_adisc(vport, ndlp);
1751
1752         return ndlp->nlp_state;
1753 }
1754
1755 static uint32_t
1756 lpfc_rcv_plogi_mapped_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1757                            void *arg, uint32_t evt)
1758 {
1759         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1760
1761         lpfc_rcv_plogi(vport, ndlp, cmdiocb);
1762         return ndlp->nlp_state;
1763 }
1764
1765 static uint32_t
1766 lpfc_rcv_prli_mapped_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1767                           void *arg, uint32_t evt)
1768 {
1769         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1770
1771         lpfc_els_rsp_prli_acc(vport, cmdiocb, ndlp);
1772         return ndlp->nlp_state;
1773 }
1774
1775 static uint32_t
1776 lpfc_rcv_logo_mapped_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1777                           void *arg, uint32_t evt)
1778 {
1779         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1780
1781         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_LOGO);
1782         return ndlp->nlp_state;
1783 }
1784
1785 static uint32_t
1786 lpfc_rcv_padisc_mapped_node(struct lpfc_vport *vport,
1787                             struct lpfc_nodelist *ndlp,
1788                             void *arg, uint32_t evt)
1789 {
1790         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1791
1792         lpfc_rcv_padisc(vport, ndlp, cmdiocb);
1793         return ndlp->nlp_state;
1794 }
1795
1796 static uint32_t
1797 lpfc_rcv_prlo_mapped_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1798                           void *arg, uint32_t evt)
1799 {
1800         struct lpfc_hba  *phba = vport->phba;
1801         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1802
1803         /* flush the target */
1804         lpfc_sli_abort_iocb(vport, &phba->sli.ring[phba->sli.fcp_ring],
1805                             ndlp->nlp_sid, 0, LPFC_CTX_TGT);
1806
1807         /* Treat like rcv logo */
1808         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_PRLO);
1809         return ndlp->nlp_state;
1810 }
1811
1812 static uint32_t
1813 lpfc_device_recov_mapped_node(struct lpfc_vport *vport,
1814                               struct lpfc_nodelist *ndlp,
1815                               void *arg,
1816                               uint32_t evt)
1817 {
1818         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1819
1820         ndlp->nlp_prev_state = NLP_STE_MAPPED_NODE;
1821         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1822         spin_lock_irq(shost->host_lock);
1823         ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
1824         spin_unlock_irq(shost->host_lock);
1825         lpfc_disc_set_adisc(vport, ndlp);
1826         return ndlp->nlp_state;
1827 }
1828
1829 static uint32_t
1830 lpfc_rcv_plogi_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1831                         void *arg, uint32_t evt)
1832 {
1833         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1834         struct lpfc_iocbq *cmdiocb  = (struct lpfc_iocbq *) arg;
1835
1836         /* Ignore PLOGI if we have an outstanding LOGO */
1837         if (ndlp->nlp_flag & (NLP_LOGO_SND | NLP_LOGO_ACC))
1838                 return ndlp->nlp_state;
1839         if (lpfc_rcv_plogi(vport, ndlp, cmdiocb)) {
1840                 lpfc_cancel_retry_delay_tmo(vport, ndlp);
1841                 spin_lock_irq(shost->host_lock);
1842                 ndlp->nlp_flag &= ~(NLP_NPR_ADISC | NLP_NPR_2B_DISC);
1843                 spin_unlock_irq(shost->host_lock);
1844         } else if (!(ndlp->nlp_flag & NLP_NPR_2B_DISC)) {
1845                 /* send PLOGI immediately, move to PLOGI issue state */
1846                 if (!(ndlp->nlp_flag & NLP_DELAY_TMO)) {
1847                         ndlp->nlp_prev_state = NLP_STE_NPR_NODE;
1848                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
1849                         lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0);
1850                 }
1851         }
1852         return ndlp->nlp_state;
1853 }
1854
1855 static uint32_t
1856 lpfc_rcv_prli_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1857                        void *arg, uint32_t evt)
1858 {
1859         struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
1860         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1861         struct ls_rjt     stat;
1862
1863         memset(&stat, 0, sizeof (struct ls_rjt));
1864         stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
1865         stat.un.b.lsRjtRsnCodeExp = LSEXP_NOTHING_MORE;
1866         lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
1867
1868         if (!(ndlp->nlp_flag & NLP_DELAY_TMO)) {
1869                 if (ndlp->nlp_flag & NLP_NPR_ADISC) {
1870                         spin_lock_irq(shost->host_lock);
1871                         ndlp->nlp_flag &= ~NLP_NPR_ADISC;
1872                         ndlp->nlp_prev_state = NLP_STE_NPR_NODE;
1873                         spin_unlock_irq(shost->host_lock);
1874                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_ADISC_ISSUE);
1875                         lpfc_issue_els_adisc(vport, ndlp, 0);
1876                 } else {
1877                         ndlp->nlp_prev_state = NLP_STE_NPR_NODE;
1878                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
1879                         lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0);
1880                 }
1881         }
1882         return ndlp->nlp_state;
1883 }
1884
1885 static uint32_t
1886 lpfc_rcv_logo_npr_node(struct lpfc_vport *vport,  struct lpfc_nodelist *ndlp,
1887                        void *arg, uint32_t evt)
1888 {
1889         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1890
1891         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_LOGO);
1892         return ndlp->nlp_state;
1893 }
1894
1895 static uint32_t
1896 lpfc_rcv_padisc_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1897                          void *arg, uint32_t evt)
1898 {
1899         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1900
1901         lpfc_rcv_padisc(vport, ndlp, cmdiocb);
1902         /*
1903          * Do not start discovery if discovery is about to start
1904          * or discovery in progress for this node. Starting discovery
1905          * here will affect the counting of discovery threads.
1906          */
1907         if (!(ndlp->nlp_flag & NLP_DELAY_TMO) &&
1908             !(ndlp->nlp_flag & NLP_NPR_2B_DISC)) {
1909                 if (ndlp->nlp_flag & NLP_NPR_ADISC) {
1910                         ndlp->nlp_flag &= ~NLP_NPR_ADISC;
1911                         ndlp->nlp_prev_state = NLP_STE_NPR_NODE;
1912                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_ADISC_ISSUE);
1913                         lpfc_issue_els_adisc(vport, ndlp, 0);
1914                 } else {
1915                         ndlp->nlp_prev_state = NLP_STE_NPR_NODE;
1916                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
1917                         lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0);
1918                 }
1919         }
1920         return ndlp->nlp_state;
1921 }
1922
1923 static uint32_t
1924 lpfc_rcv_prlo_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1925                        void *arg, uint32_t evt)
1926 {
1927         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1928         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1929
1930         spin_lock_irq(shost->host_lock);
1931         ndlp->nlp_flag |= NLP_LOGO_ACC;
1932         spin_unlock_irq(shost->host_lock);
1933
1934         lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
1935
1936         if ((ndlp->nlp_flag & NLP_DELAY_TMO) == 0) {
1937                 mod_timer(&ndlp->nlp_delayfunc, jiffies + HZ * 1);
1938                 spin_lock_irq(shost->host_lock);
1939                 ndlp->nlp_flag |= NLP_DELAY_TMO;
1940                 ndlp->nlp_flag &= ~NLP_NPR_ADISC;
1941                 spin_unlock_irq(shost->host_lock);
1942                 ndlp->nlp_last_elscmd = ELS_CMD_PLOGI;
1943         } else {
1944                 spin_lock_irq(shost->host_lock);
1945                 ndlp->nlp_flag &= ~NLP_NPR_ADISC;
1946                 spin_unlock_irq(shost->host_lock);
1947         }
1948         return ndlp->nlp_state;
1949 }
1950
1951 static uint32_t
1952 lpfc_cmpl_plogi_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1953                          void *arg, uint32_t evt)
1954 {
1955         struct lpfc_iocbq *cmdiocb, *rspiocb;
1956         IOCB_t *irsp;
1957
1958         cmdiocb = (struct lpfc_iocbq *) arg;
1959         rspiocb = cmdiocb->context_un.rsp_iocb;
1960
1961         irsp = &rspiocb->iocb;
1962         if (irsp->ulpStatus) {
1963                 ndlp->nlp_flag |= NLP_DEFER_RM;
1964                 return NLP_STE_FREED_NODE;
1965         }
1966         return ndlp->nlp_state;
1967 }
1968
1969 static uint32_t
1970 lpfc_cmpl_prli_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1971                         void *arg, uint32_t evt)
1972 {
1973         struct lpfc_iocbq *cmdiocb, *rspiocb;
1974         IOCB_t *irsp;
1975
1976         cmdiocb = (struct lpfc_iocbq *) arg;
1977         rspiocb = cmdiocb->context_un.rsp_iocb;
1978
1979         irsp = &rspiocb->iocb;
1980         if (irsp->ulpStatus && (ndlp->nlp_flag & NLP_NODEV_REMOVE)) {
1981                 lpfc_drop_node(vport, ndlp);
1982                 return NLP_STE_FREED_NODE;
1983         }
1984         return ndlp->nlp_state;
1985 }
1986
1987 static uint32_t
1988 lpfc_cmpl_logo_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1989                         void *arg, uint32_t evt)
1990 {
1991         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1992         if (ndlp->nlp_DID == Fabric_DID) {
1993                 spin_lock_irq(shost->host_lock);
1994                 vport->fc_flag &= ~(FC_FABRIC | FC_PUBLIC_LOOP);
1995                 spin_unlock_irq(shost->host_lock);
1996         }
1997         lpfc_unreg_rpi(vport, ndlp);
1998         return ndlp->nlp_state;
1999 }
2000
2001 static uint32_t
2002 lpfc_cmpl_adisc_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
2003                          void *arg, uint32_t evt)
2004 {
2005         struct lpfc_iocbq *cmdiocb, *rspiocb;
2006         IOCB_t *irsp;
2007
2008         cmdiocb = (struct lpfc_iocbq *) arg;
2009         rspiocb = cmdiocb->context_un.rsp_iocb;
2010
2011         irsp = &rspiocb->iocb;
2012         if (irsp->ulpStatus && (ndlp->nlp_flag & NLP_NODEV_REMOVE)) {
2013                 lpfc_drop_node(vport, ndlp);
2014                 return NLP_STE_FREED_NODE;
2015         }
2016         return ndlp->nlp_state;
2017 }
2018
2019 static uint32_t
2020 lpfc_cmpl_reglogin_npr_node(struct lpfc_vport *vport,
2021                             struct lpfc_nodelist *ndlp,
2022                             void *arg, uint32_t evt)
2023 {
2024         LPFC_MBOXQ_t *pmb = (LPFC_MBOXQ_t *) arg;
2025         MAILBOX_t    *mb = &pmb->u.mb;
2026
2027         if (!mb->mbxStatus) {
2028                 ndlp->nlp_rpi = mb->un.varWords[0];
2029                 ndlp->nlp_flag |= NLP_RPI_REGISTERED;
2030         } else {
2031                 if (ndlp->nlp_flag & NLP_NODEV_REMOVE) {
2032                         lpfc_drop_node(vport, ndlp);
2033                         return NLP_STE_FREED_NODE;
2034                 }
2035         }
2036         return ndlp->nlp_state;
2037 }
2038
2039 static uint32_t
2040 lpfc_device_rm_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
2041                         void *arg, uint32_t evt)
2042 {
2043         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
2044
2045         if (ndlp->nlp_flag & NLP_NPR_2B_DISC) {
2046                 spin_lock_irq(shost->host_lock);
2047                 ndlp->nlp_flag |= NLP_NODEV_REMOVE;
2048                 spin_unlock_irq(shost->host_lock);
2049                 return ndlp->nlp_state;
2050         }
2051         lpfc_drop_node(vport, ndlp);
2052         return NLP_STE_FREED_NODE;
2053 }
2054
2055 static uint32_t
2056 lpfc_device_recov_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
2057                            void *arg, uint32_t evt)
2058 {
2059         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
2060
2061         /* Don't do anything that will mess up processing of the
2062          * previous RSCN.
2063          */
2064         if (vport->fc_flag & FC_RSCN_DEFERRED)
2065                 return ndlp->nlp_state;
2066
2067         lpfc_cancel_retry_delay_tmo(vport, ndlp);
2068         spin_lock_irq(shost->host_lock);
2069         ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
2070         spin_unlock_irq(shost->host_lock);
2071         return ndlp->nlp_state;
2072 }
2073
2074
2075 /* This next section defines the NPort Discovery State Machine */
2076
2077 /* There are 4 different double linked lists nodelist entries can reside on.
2078  * The plogi list and adisc list are used when Link Up discovery or RSCN
2079  * processing is needed. Each list holds the nodes that we will send PLOGI
2080  * or ADISC on. These lists will keep track of what nodes will be effected
2081  * by an RSCN, or a Link Up (Typically, all nodes are effected on Link Up).
2082  * The unmapped_list will contain all nodes that we have successfully logged
2083  * into at the Fibre Channel level. The mapped_list will contain all nodes
2084  * that are mapped FCP targets.
2085  */
2086 /*
2087  * The bind list is a list of undiscovered (potentially non-existent) nodes
2088  * that we have saved binding information on. This information is used when
2089  * nodes transition from the unmapped to the mapped list.
2090  */
2091 /* For UNUSED_NODE state, the node has just been allocated .
2092  * For PLOGI_ISSUE and REG_LOGIN_ISSUE, the node is on
2093  * the PLOGI list. For REG_LOGIN_COMPL, the node is taken off the PLOGI list
2094  * and put on the unmapped list. For ADISC processing, the node is taken off
2095  * the ADISC list and placed on either the mapped or unmapped list (depending
2096  * on its previous state). Once on the unmapped list, a PRLI is issued and the
2097  * state changed to PRLI_ISSUE. When the PRLI completion occurs, the state is
2098  * changed to UNMAPPED_NODE. If the completion indicates a mapped
2099  * node, the node is taken off the unmapped list. The binding list is checked
2100  * for a valid binding, or a binding is automatically assigned. If binding
2101  * assignment is unsuccessful, the node is left on the unmapped list. If
2102  * binding assignment is successful, the associated binding list entry (if
2103  * any) is removed, and the node is placed on the mapped list.
2104  */
2105 /*
2106  * For a Link Down, all nodes on the ADISC, PLOGI, unmapped or mapped
2107  * lists will receive a DEVICE_RECOVERY event. If the linkdown or devloss timers
2108  * expire, all effected nodes will receive a DEVICE_RM event.
2109  */
2110 /*
2111  * For a Link Up or RSCN, all nodes will move from the mapped / unmapped lists
2112  * to either the ADISC or PLOGI list.  After a Nameserver query or ALPA loopmap
2113  * check, additional nodes may be added or removed (via DEVICE_RM) to / from
2114  * the PLOGI or ADISC lists. Once the PLOGI and ADISC lists are populated,
2115  * we will first process the ADISC list.  32 entries are processed initially and
2116  * ADISC is initited for each one.  Completions / Events for each node are
2117  * funnelled thru the state machine.  As each node finishes ADISC processing, it
2118  * starts ADISC for any nodes waiting for ADISC processing. If no nodes are
2119  * waiting, and the ADISC list count is identically 0, then we are done. For
2120  * Link Up discovery, since all nodes on the PLOGI list are UNREG_LOGIN'ed, we
2121  * can issue a CLEAR_LA and reenable Link Events. Next we will process the PLOGI
2122  * list.  32 entries are processed initially and PLOGI is initited for each one.
2123  * Completions / Events for each node are funnelled thru the state machine.  As
2124  * each node finishes PLOGI processing, it starts PLOGI for any nodes waiting
2125  * for PLOGI processing. If no nodes are waiting, and the PLOGI list count is
2126  * indentically 0, then we are done. We have now completed discovery / RSCN
2127  * handling. Upon completion, ALL nodes should be on either the mapped or
2128  * unmapped lists.
2129  */
2130
2131 static uint32_t (*lpfc_disc_action[NLP_STE_MAX_STATE * NLP_EVT_MAX_EVENT])
2132      (struct lpfc_vport *, struct lpfc_nodelist *, void *, uint32_t) = {
2133         /* Action routine                  Event       Current State  */
2134         lpfc_rcv_plogi_unused_node,     /* RCV_PLOGI   UNUSED_NODE    */
2135         lpfc_rcv_els_unused_node,       /* RCV_PRLI        */
2136         lpfc_rcv_logo_unused_node,      /* RCV_LOGO        */
2137         lpfc_rcv_els_unused_node,       /* RCV_ADISC       */
2138         lpfc_rcv_els_unused_node,       /* RCV_PDISC       */
2139         lpfc_rcv_els_unused_node,       /* RCV_PRLO        */
2140         lpfc_disc_illegal,              /* CMPL_PLOGI      */
2141         lpfc_disc_illegal,              /* CMPL_PRLI       */
2142         lpfc_cmpl_logo_unused_node,     /* CMPL_LOGO       */
2143         lpfc_disc_illegal,              /* CMPL_ADISC      */
2144         lpfc_disc_illegal,              /* CMPL_REG_LOGIN  */
2145         lpfc_device_rm_unused_node,     /* DEVICE_RM       */
2146         lpfc_disc_illegal,              /* DEVICE_RECOVERY */
2147
2148         lpfc_rcv_plogi_plogi_issue,     /* RCV_PLOGI   PLOGI_ISSUE    */
2149         lpfc_rcv_prli_plogi_issue,      /* RCV_PRLI        */
2150         lpfc_rcv_logo_plogi_issue,      /* RCV_LOGO        */
2151         lpfc_rcv_els_plogi_issue,       /* RCV_ADISC       */
2152         lpfc_rcv_els_plogi_issue,       /* RCV_PDISC       */
2153         lpfc_rcv_els_plogi_issue,       /* RCV_PRLO        */
2154         lpfc_cmpl_plogi_plogi_issue,    /* CMPL_PLOGI      */
2155         lpfc_disc_illegal,              /* CMPL_PRLI       */
2156         lpfc_cmpl_logo_plogi_issue,     /* CMPL_LOGO       */
2157         lpfc_disc_illegal,              /* CMPL_ADISC      */
2158         lpfc_cmpl_reglogin_plogi_issue,/* CMPL_REG_LOGIN  */
2159         lpfc_device_rm_plogi_issue,     /* DEVICE_RM       */
2160         lpfc_device_recov_plogi_issue,  /* DEVICE_RECOVERY */
2161
2162         lpfc_rcv_plogi_adisc_issue,     /* RCV_PLOGI   ADISC_ISSUE    */
2163         lpfc_rcv_prli_adisc_issue,      /* RCV_PRLI        */
2164         lpfc_rcv_logo_adisc_issue,      /* RCV_LOGO        */
2165         lpfc_rcv_padisc_adisc_issue,    /* RCV_ADISC       */
2166         lpfc_rcv_padisc_adisc_issue,    /* RCV_PDISC       */
2167         lpfc_rcv_prlo_adisc_issue,      /* RCV_PRLO        */
2168         lpfc_disc_illegal,              /* CMPL_PLOGI      */
2169         lpfc_disc_illegal,              /* CMPL_PRLI       */
2170         lpfc_disc_illegal,              /* CMPL_LOGO       */
2171         lpfc_cmpl_adisc_adisc_issue,    /* CMPL_ADISC      */
2172         lpfc_disc_illegal,              /* CMPL_REG_LOGIN  */
2173         lpfc_device_rm_adisc_issue,     /* DEVICE_RM       */
2174         lpfc_device_recov_adisc_issue,  /* DEVICE_RECOVERY */
2175
2176         lpfc_rcv_plogi_reglogin_issue,  /* RCV_PLOGI  REG_LOGIN_ISSUE */
2177         lpfc_rcv_prli_reglogin_issue,   /* RCV_PLOGI       */
2178         lpfc_rcv_logo_reglogin_issue,   /* RCV_LOGO        */
2179         lpfc_rcv_padisc_reglogin_issue, /* RCV_ADISC       */
2180         lpfc_rcv_padisc_reglogin_issue, /* RCV_PDISC       */
2181         lpfc_rcv_prlo_reglogin_issue,   /* RCV_PRLO        */
2182         lpfc_cmpl_plogi_illegal,        /* CMPL_PLOGI      */
2183         lpfc_disc_illegal,              /* CMPL_PRLI       */
2184         lpfc_disc_illegal,              /* CMPL_LOGO       */
2185         lpfc_disc_illegal,              /* CMPL_ADISC      */
2186         lpfc_cmpl_reglogin_reglogin_issue,/* CMPL_REG_LOGIN  */
2187         lpfc_device_rm_reglogin_issue,  /* DEVICE_RM       */
2188         lpfc_device_recov_reglogin_issue,/* DEVICE_RECOVERY */
2189
2190         lpfc_rcv_plogi_prli_issue,      /* RCV_PLOGI   PRLI_ISSUE     */
2191         lpfc_rcv_prli_prli_issue,       /* RCV_PRLI        */
2192         lpfc_rcv_logo_prli_issue,       /* RCV_LOGO        */
2193         lpfc_rcv_padisc_prli_issue,     /* RCV_ADISC       */
2194         lpfc_rcv_padisc_prli_issue,     /* RCV_PDISC       */
2195         lpfc_rcv_prlo_prli_issue,       /* RCV_PRLO        */
2196         lpfc_cmpl_plogi_illegal,        /* CMPL_PLOGI      */
2197         lpfc_cmpl_prli_prli_issue,      /* CMPL_PRLI       */
2198         lpfc_disc_illegal,              /* CMPL_LOGO       */
2199         lpfc_disc_illegal,              /* CMPL_ADISC      */
2200         lpfc_disc_illegal,              /* CMPL_REG_LOGIN  */
2201         lpfc_device_rm_prli_issue,      /* DEVICE_RM       */
2202         lpfc_device_recov_prli_issue,   /* DEVICE_RECOVERY */
2203
2204         lpfc_rcv_plogi_unmap_node,      /* RCV_PLOGI   UNMAPPED_NODE  */
2205         lpfc_rcv_prli_unmap_node,       /* RCV_PRLI        */
2206         lpfc_rcv_logo_unmap_node,       /* RCV_LOGO        */
2207         lpfc_rcv_padisc_unmap_node,     /* RCV_ADISC       */
2208         lpfc_rcv_padisc_unmap_node,     /* RCV_PDISC       */
2209         lpfc_rcv_prlo_unmap_node,       /* RCV_PRLO        */
2210         lpfc_disc_illegal,              /* CMPL_PLOGI      */
2211         lpfc_disc_illegal,              /* CMPL_PRLI       */
2212         lpfc_disc_illegal,              /* CMPL_LOGO       */
2213         lpfc_disc_illegal,              /* CMPL_ADISC      */
2214         lpfc_disc_illegal,              /* CMPL_REG_LOGIN  */
2215         lpfc_disc_illegal,              /* DEVICE_RM       */
2216         lpfc_device_recov_unmap_node,   /* DEVICE_RECOVERY */
2217
2218         lpfc_rcv_plogi_mapped_node,     /* RCV_PLOGI   MAPPED_NODE    */
2219         lpfc_rcv_prli_mapped_node,      /* RCV_PRLI        */
2220         lpfc_rcv_logo_mapped_node,      /* RCV_LOGO        */
2221         lpfc_rcv_padisc_mapped_node,    /* RCV_ADISC       */
2222         lpfc_rcv_padisc_mapped_node,    /* RCV_PDISC       */
2223         lpfc_rcv_prlo_mapped_node,      /* RCV_PRLO        */
2224         lpfc_disc_illegal,              /* CMPL_PLOGI      */
2225         lpfc_disc_illegal,              /* CMPL_PRLI       */
2226         lpfc_disc_illegal,              /* CMPL_LOGO       */
2227         lpfc_disc_illegal,              /* CMPL_ADISC      */
2228         lpfc_disc_illegal,              /* CMPL_REG_LOGIN  */
2229         lpfc_disc_illegal,              /* DEVICE_RM       */
2230         lpfc_device_recov_mapped_node,  /* DEVICE_RECOVERY */
2231
2232         lpfc_rcv_plogi_npr_node,        /* RCV_PLOGI   NPR_NODE    */
2233         lpfc_rcv_prli_npr_node,         /* RCV_PRLI        */
2234         lpfc_rcv_logo_npr_node,         /* RCV_LOGO        */
2235         lpfc_rcv_padisc_npr_node,       /* RCV_ADISC       */
2236         lpfc_rcv_padisc_npr_node,       /* RCV_PDISC       */
2237         lpfc_rcv_prlo_npr_node,         /* RCV_PRLO        */
2238         lpfc_cmpl_plogi_npr_node,       /* CMPL_PLOGI      */
2239         lpfc_cmpl_prli_npr_node,        /* CMPL_PRLI       */
2240         lpfc_cmpl_logo_npr_node,        /* CMPL_LOGO       */
2241         lpfc_cmpl_adisc_npr_node,       /* CMPL_ADISC      */
2242         lpfc_cmpl_reglogin_npr_node,    /* CMPL_REG_LOGIN  */
2243         lpfc_device_rm_npr_node,        /* DEVICE_RM       */
2244         lpfc_device_recov_npr_node,     /* DEVICE_RECOVERY */
2245 };
2246
2247 int
2248 lpfc_disc_state_machine(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
2249                         void *arg, uint32_t evt)
2250 {
2251         uint32_t cur_state, rc;
2252         uint32_t(*func) (struct lpfc_vport *, struct lpfc_nodelist *, void *,
2253                          uint32_t);
2254         uint32_t got_ndlp = 0;
2255
2256         if (lpfc_nlp_get(ndlp))
2257                 got_ndlp = 1;
2258
2259         cur_state = ndlp->nlp_state;
2260
2261         /* DSM in event <evt> on NPort <nlp_DID> in state <cur_state> */
2262         lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
2263                          "0211 DSM in event x%x on NPort x%x in "
2264                          "state %d Data: x%x\n",
2265                          evt, ndlp->nlp_DID, cur_state, ndlp->nlp_flag);
2266
2267         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_DSM,
2268                  "DSM in:          evt:%d ste:%d did:x%x",
2269                 evt, cur_state, ndlp->nlp_DID);
2270
2271         func = lpfc_disc_action[(cur_state * NLP_EVT_MAX_EVENT) + evt];
2272         rc = (func) (vport, ndlp, arg, evt);
2273
2274         /* DSM out state <rc> on NPort <nlp_DID> */
2275         if (got_ndlp) {
2276                 lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
2277                          "0212 DSM out state %d on NPort x%x Data: x%x\n",
2278                          rc, ndlp->nlp_DID, ndlp->nlp_flag);
2279
2280                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_DSM,
2281                         "DSM out:         ste:%d did:x%x flg:x%x",
2282                         rc, ndlp->nlp_DID, ndlp->nlp_flag);
2283                 /* Decrement the ndlp reference count held for this function */
2284                 lpfc_nlp_put(ndlp);
2285         } else {
2286                 lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
2287                         "0213 DSM out state %d on NPort free\n", rc);
2288
2289                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_DSM,
2290                         "DSM out:         ste:%d did:x%x flg:x%x",
2291                         rc, 0, 0);
2292         }
2293
2294         return rc;
2295 }