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/interrupt.h>
  25
  26 #include <scsi/scsi.h>
  27 #include <scsi/scsi_device.h>
  28 #include <scsi/scsi_host.h>
  29 #include <scsi/scsi_transport_fc.h>
  30
  31 #include "lpfc_hw4.h"
  32 #include "lpfc_hw.h"
  33 #include "lpfc_sli.h"
  34 #include "lpfc_sli4.h"
  35 #include "lpfc_nl.h"
  36 #include "lpfc_disc.h"
  37 #include "lpfc_scsi.h"
  38 #include "lpfc.h"
  39 #include "lpfc_logmsg.h"
  40 #include "lpfc_crtn.h"
  41 #include "lpfc_vport.h"
  42 #include "lpfc_debugfs.h"
  43
  44
  45 /* Called to verify a rcv'ed ADISC was intended for us. */
  46 static int
  47 lpfc_check_adisc(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
  48                  struct lpfc_name *nn, struct lpfc_name *pn)
  49 {
  50         /* Compare the ADISC rsp WWNN / WWPN matches our internal node
  51          * table entry for that node.
  52          */
  53         if (memcmp(nn, &ndlp->nlp_nodename, sizeof (struct lpfc_name)))
  54                 return 0;
  55
  56         if (memcmp(pn, &ndlp->nlp_portname, sizeof (struct lpfc_name)))
  57                 return 0;
  58
  59         /* we match, return success */
  60         return 1;
  61 }
  62
  63 int
  64 lpfc_check_sparm(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
  65                  struct serv_parm *sp, uint32_t class, int flogi)
  66 {
  67         volatile struct serv_parm *hsp = &vport->fc_sparam;
  68         uint16_t hsp_value, ssp_value = 0;
  69
  70         /*
  71          * The receive data field size and buffer-to-buffer receive data field
  72          * size entries are 16 bits but are represented as two 8-bit fields in
  73          * the driver data structure to account for rsvd bits and other control
  74          * bits.  Reconstruct and compare the fields as a 16-bit values before
  75          * correcting the byte values.
  76          */
  77         if (sp->cls1.classValid) {
  78                 if (!flogi) {
  79                         hsp_value = ((hsp->cls1.rcvDataSizeMsb << 8) |
  80                                      hsp->cls1.rcvDataSizeLsb);
  81                         ssp_value = ((sp->cls1.rcvDataSizeMsb << 8) |
  82                                      sp->cls1.rcvDataSizeLsb);
  83                         if (!ssp_value)
  84                                 goto bad_service_param;
  85                         if (ssp_value > hsp_value) {
  86                                 sp->cls1.rcvDataSizeLsb =
  87                                         hsp->cls1.rcvDataSizeLsb;
  88                                 sp->cls1.rcvDataSizeMsb =
  89                                         hsp->cls1.rcvDataSizeMsb;
  90                         }
  91                 }
  92         } else if (class == CLASS1)
  93                 goto bad_service_param;
  94         if (sp->cls2.classValid) {
  95                 if (!flogi) {
  96                         hsp_value = ((hsp->cls2.rcvDataSizeMsb << 8) |
  97                                      hsp->cls2.rcvDataSizeLsb);
  98                         ssp_value = ((sp->cls2.rcvDataSizeMsb << 8) |
  99                                      sp->cls2.rcvDataSizeLsb);
 100                         if (!ssp_value)
 101                                 goto bad_service_param;
 102                         if (ssp_value > hsp_value) {
 103                                 sp->cls2.rcvDataSizeLsb =
 104                                         hsp->cls2.rcvDataSizeLsb;
 105                                 sp->cls2.rcvDataSizeMsb =
 106                                         hsp->cls2.rcvDataSizeMsb;
 107                         }
 108                 }
 109         } else if (class == CLASS2)
 110                 goto bad_service_param;
 111         if (sp->cls3.classValid) {
 112                 if (!flogi) {
 113                         hsp_value = ((hsp->cls3.rcvDataSizeMsb << 8) |
 114                                      hsp->cls3.rcvDataSizeLsb);
 115                         ssp_value = ((sp->cls3.rcvDataSizeMsb << 8) |
 116                                      sp->cls3.rcvDataSizeLsb);
 117                         if (!ssp_value)
 118                                 goto bad_service_param;
 119                         if (ssp_value > hsp_value) {
 120                                 sp->cls3.rcvDataSizeLsb =
 121                                         hsp->cls3.rcvDataSizeLsb;
 122                                 sp->cls3.rcvDataSizeMsb =
 123                                         hsp->cls3.rcvDataSizeMsb;
 124                         }
 125                 }
 126         } else if (class == CLASS3)
 127                 goto bad_service_param;
 128
 129         /*
 130          * Preserve the upper four bits of the MSB from the PLOGI response.
 131          * These bits contain the Buffer-to-Buffer State Change Number
 132          * from the target and need to be passed to the FW.
 133          */
 134         hsp_value = (hsp->cmn.bbRcvSizeMsb << 8) | hsp->cmn.bbRcvSizeLsb;
 135         ssp_value = (sp->cmn.bbRcvSizeMsb << 8) | sp->cmn.bbRcvSizeLsb;
 136         if (ssp_value > hsp_value) {
 137                 sp->cmn.bbRcvSizeLsb = hsp->cmn.bbRcvSizeLsb;
 138                 sp->cmn.bbRcvSizeMsb = (sp->cmn.bbRcvSizeMsb & 0xF0) |
 139                                        (hsp->cmn.bbRcvSizeMsb & 0x0F);
 140         }
 141
 142         memcpy(&ndlp->nlp_nodename, &sp->nodeName, sizeof (struct lpfc_name));
 143         memcpy(&ndlp->nlp_portname, &sp->portName, sizeof (struct lpfc_name));
 144         return 1;
 145 bad_service_param:
 146         lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
 147                          "0207 Device %x "
 148                          "(%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x) sent "
 149                          "invalid service parameters.  Ignoring device.\n",
 150                          ndlp->nlp_DID,
 151                          sp->nodeName.u.wwn[0], sp->nodeName.u.wwn[1],
 152                          sp->nodeName.u.wwn[2], sp->nodeName.u.wwn[3],
 153                          sp->nodeName.u.wwn[4], sp->nodeName.u.wwn[5],
 154                          sp->nodeName.u.wwn[6], sp->nodeName.u.wwn[7]);
 155         return 0;
 156 }
 157
 158 static void *
 159 lpfc_check_elscmpl_iocb(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
 160                         struct lpfc_iocbq *rspiocb)
 161 {
 162         struct lpfc_dmabuf *pcmd, *prsp;
 163         uint32_t *lp;
 164         void     *ptr = NULL;
 165         IOCB_t   *irsp;
 166
 167         irsp = &rspiocb->iocb;
 168         pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
 169
 170         /* For lpfc_els_abort, context2 could be zero'ed to delay
 171          * freeing associated memory till after ABTS completes.
 172          */
 173         if (pcmd) {
 174                 prsp =  list_get_first(&pcmd->list, struct lpfc_dmabuf,
 175                                        list);
 176                 if (prsp) {
 177                         lp = (uint32_t *) prsp->virt;
 178                         ptr = (void *)((uint8_t *)lp + sizeof(uint32_t));
 179                 }
 180         } else {
 181                 /* Force ulpStatus error since we are returning NULL ptr */
 182                 if (!(irsp->ulpStatus)) {
 183                         irsp->ulpStatus = IOSTAT_LOCAL_REJECT;
 184                         irsp->un.ulpWord[4] = IOERR_SLI_ABORTED;
 185                 }
 186                 ptr = NULL;
 187         }
 188         return ptr;
 189 }
 190
 191
 192 /*
 193  * Free resources / clean up outstanding I/Os
 194  * associated with a LPFC_NODELIST entry. This
 195  * routine effectively results in a "software abort".
 196  */
 197 int
 198 lpfc_els_abort(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
 199 {
 200         LIST_HEAD(completions);
 201         struct lpfc_sli  *psli = &phba->sli;
 202         struct lpfc_sli_ring *pring = &psli->ring[LPFC_ELS_RING];
 203         struct lpfc_iocbq *iocb, *next_iocb;
 204
 205         /* Abort outstanding I/O on NPort <nlp_DID> */
 206         lpfc_printf_vlog(ndlp->vport, KERN_INFO, LOG_DISCOVERY,
 207                          "0205 Abort outstanding I/O on NPort x%x "
 208                          "Data: x%x x%x x%x\n",
 209                          ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
 210                          ndlp->nlp_rpi);
 211
 212         lpfc_fabric_abort_nport(ndlp);
 213
 214         /* First check the txq */
 215         spin_lock_irq(&phba->hbalock);
 216         list_for_each_entry_safe(iocb, next_iocb, &pring->txq, list) {
 217                 /* Check to see if iocb matches the nport we are looking for */
 218                 if (lpfc_check_sli_ndlp(phba, pring, iocb, ndlp)) {
 219                         /* It matches, so deque and call compl with anp error */
 220                         list_move_tail(&iocb->list, &completions);
 221                         pring->txq_cnt--;
 222                 }
 223         }
 224
 225         /* Next check the txcmplq */
 226         list_for_each_entry_safe(iocb, next_iocb, &pring->txcmplq, list) {
 227                 /* Check to see if iocb matches the nport we are looking for */
 228                 if (lpfc_check_sli_ndlp(phba, pring, iocb, ndlp)) {
 229                         lpfc_sli_issue_abort_iotag(phba, pring, iocb);
 230                 }
 231         }
 232         spin_unlock_irq(&phba->hbalock);
 233
 234         /* Cancel all the IOCBs from the completions list */
 235         lpfc_sli_cancel_iocbs(phba, &completions, IOSTAT_LOCAL_REJECT,
 236                               IOERR_SLI_ABORTED);
 237
 238         lpfc_cancel_retry_delay_tmo(phba->pport, ndlp);
 239         return 0;
 240 }
 241
 242 static int
 243 lpfc_rcv_plogi(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 244                struct lpfc_iocbq *cmdiocb)
 245 {
 246         struct Scsi_Host   *shost = lpfc_shost_from_vport(vport);
 247         struct lpfc_hba    *phba = vport->phba;
 248         struct lpfc_dmabuf *pcmd;
 249         uint32_t *lp;
 250         IOCB_t *icmd;
 251         struct serv_parm *sp;
 252         LPFC_MBOXQ_t *mbox;
 253         struct ls_rjt stat;
 254         int rc;
 255
 256         memset(&stat, 0, sizeof (struct ls_rjt));
 257         if (vport->port_state <= LPFC_FDISC) {
 258                 /* Before responding to PLOGI, check for pt2pt mode.
 259                  * If we are pt2pt, with an outstanding FLOGI, abort
 260                  * the FLOGI and resend it first.
 261                  */
 262                 if (vport->fc_flag & FC_PT2PT) {
 263                          lpfc_els_abort_flogi(phba);
 264                         if (!(vport->fc_flag & FC_PT2PT_PLOGI)) {
 265                                 /* If the other side is supposed to initiate
 266                                  * the PLOGI anyway, just ACC it now and
 267                                  * move on with discovery.
 268                                  */
 269                                 phba->fc_edtov = FF_DEF_EDTOV;
 270                                 phba->fc_ratov = FF_DEF_RATOV;
 271                                 /* Start discovery - this should just do
 272                                    CLEAR_LA */
 273                                 lpfc_disc_start(vport);
 274                         } else
 275                                 lpfc_initial_flogi(vport);
 276                 } else {
 277                         stat.un.b.lsRjtRsnCode = LSRJT_LOGICAL_BSY;
 278                         stat.un.b.lsRjtRsnCodeExp = LSEXP_NOTHING_MORE;
 279                         lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb,
 280                                             ndlp, NULL);
 281                         return 0;
 282                 }
 283         }
 284         pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
 285         lp = (uint32_t *) pcmd->virt;
 286         sp = (struct serv_parm *) ((uint8_t *) lp + sizeof (uint32_t));
 287         if (wwn_to_u64(sp->portName.u.wwn) == 0) {
 288                 lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
 289                                  "0140 PLOGI Reject: invalid nname\n");
 290                 stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
 291                 stat.un.b.lsRjtRsnCodeExp = LSEXP_INVALID_PNAME;
 292                 lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp,
 293                         NULL);
 294                 return 0;
 295         }
 296         if (wwn_to_u64(sp->nodeName.u.wwn) == 0) {
 297                 lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
 298                                  "0141 PLOGI Reject: invalid pname\n");
 299                 stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
 300                 stat.un.b.lsRjtRsnCodeExp = LSEXP_INVALID_NNAME;
 301                 lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp,
 302                         NULL);
 303                 return 0;
 304         }
 305         if ((lpfc_check_sparm(vport, ndlp, sp, CLASS3, 0) == 0)) {
 306                 /* Reject this request because invalid parameters */
 307                 stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
 308                 stat.un.b.lsRjtRsnCodeExp = LSEXP_SPARM_OPTIONS;
 309                 lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp,
 310                         NULL);
 311                 return 0;
 312         }
 313         icmd = &cmdiocb->iocb;
 314
 315         /* PLOGI chkparm OK */
 316         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
 317                          "0114 PLOGI chkparm OK Data: x%x x%x x%x x%x\n",
 318                          ndlp->nlp_DID, ndlp->nlp_state, ndlp->nlp_flag,
 319                          ndlp->nlp_rpi);
 320
 321         if (vport->cfg_fcp_class == 2 && sp->cls2.classValid)
 322                 ndlp->nlp_fcp_info |= CLASS2;
 323         else
 324                 ndlp->nlp_fcp_info |= CLASS3;
 325
 326         ndlp->nlp_class_sup = 0;
 327         if (sp->cls1.classValid)
 328                 ndlp->nlp_class_sup |= FC_COS_CLASS1;
 329         if (sp->cls2.classValid)
 330                 ndlp->nlp_class_sup |= FC_COS_CLASS2;
 331         if (sp->cls3.classValid)
 332                 ndlp->nlp_class_sup |= FC_COS_CLASS3;
 333         if (sp->cls4.classValid)
 334                 ndlp->nlp_class_sup |= FC_COS_CLASS4;
 335         ndlp->nlp_maxframe =
 336                 ((sp->cmn.bbRcvSizeMsb & 0x0F) << 8) | sp->cmn.bbRcvSizeLsb;
 337
 338         /* no need to reg_login if we are already in one of these states */
 339         switch (ndlp->nlp_state) {
 340         case  NLP_STE_NPR_NODE:
 341                 if (!(ndlp->nlp_flag & NLP_NPR_ADISC))
 342                         break;
 343         case  NLP_STE_REG_LOGIN_ISSUE:
 344         case  NLP_STE_PRLI_ISSUE:
 345         case  NLP_STE_UNMAPPED_NODE:
 346         case  NLP_STE_MAPPED_NODE:
 347                 lpfc_els_rsp_acc(vport, ELS_CMD_PLOGI, cmdiocb, ndlp, NULL);
 348                 return 1;
 349         }
 350
 351         if ((vport->fc_flag & FC_PT2PT) &&
 352             !(vport->fc_flag & FC_PT2PT_PLOGI)) {
 353                 /* rcv'ed PLOGI decides what our NPortId will be */
 354                 vport->fc_myDID = icmd->un.rcvels.parmRo;
 355                 mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
 356                 if (mbox == NULL)
 357                         goto out;
 358                 lpfc_config_link(phba, mbox);
 359                 mbox->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
 360                 mbox->vport = vport;
 361                 rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
 362                 if (rc == MBX_NOT_FINISHED) {
 363                         mempool_free(mbox, phba->mbox_mem_pool);
 364                         goto out;
 365                 }
 366
 367                 lpfc_can_disctmo(vport);
 368         }
 369         mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
 370         if (!mbox)
 371                 goto out;
 372
 373         rc = lpfc_reg_rpi(phba, vport->vpi, icmd->un.rcvels.remoteID,
 374                             (uint8_t *) sp, mbox, 0);
 375         if (rc) {
 376                 mempool_free(mbox, phba->mbox_mem_pool);
 377                 goto out;
 378         }
 379
 380         /* ACC PLOGI rsp command needs to execute first,
 381          * queue this mbox command to be processed later.
 382          */
 383         mbox->mbox_cmpl = lpfc_mbx_cmpl_reg_login;
 384         /*
 385          * mbox->context2 = lpfc_nlp_get(ndlp) deferred until mailbox
 386          * command issued in lpfc_cmpl_els_acc().
 387          */
 388         mbox->vport = vport;
 389         spin_lock_irq(shost->host_lock);
 390         ndlp->nlp_flag |= (NLP_ACC_REGLOGIN | NLP_RCV_PLOGI);
 391         spin_unlock_irq(shost->host_lock);
 392
 393         /*
 394          * If there is an outstanding PLOGI issued, abort it before
 395          * sending ACC rsp for received PLOGI. If pending plogi
 396          * is not canceled here, the plogi will be rejected by
 397          * remote port and will be retried. On a configuration with
 398          * single discovery thread, this will cause a huge delay in
 399          * discovery. Also this will cause multiple state machines
 400          * running in parallel for this node.
 401          */
 402         if (ndlp->nlp_state == NLP_STE_PLOGI_ISSUE) {
 403                 /* software abort outstanding PLOGI */
 404                 lpfc_els_abort(phba, ndlp);
 405         }
 406
 407         if ((vport->port_type == LPFC_NPIV_PORT &&
 408              vport->cfg_restrict_login)) {
 409
 410                 /* In order to preserve RPIs, we want to cleanup
 411                  * the default RPI the firmware created to rcv
 412                  * this ELS request. The only way to do this is
 413                  * to register, then unregister the RPI.
 414                  */
 415                 spin_lock_irq(shost->host_lock);
 416                 ndlp->nlp_flag |= NLP_RM_DFLT_RPI;
 417                 spin_unlock_irq(shost->host_lock);
 418                 stat.un.b.lsRjtRsnCode = LSRJT_INVALID_CMD;
 419                 stat.un.b.lsRjtRsnCodeExp = LSEXP_NOTHING_MORE;
 420                 lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb,
 421                         ndlp, mbox);
 422                 return 1;
 423         }
 424         lpfc_els_rsp_acc(vport, ELS_CMD_PLOGI, cmdiocb, ndlp, mbox);
 425         return 1;
 426 out:
 427         stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
 428         stat.un.b.lsRjtRsnCodeExp = LSEXP_OUT_OF_RESOURCE;
 429         lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
 430         return 0;
 431 }
 432
 433 static int
 434 lpfc_rcv_padisc(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 435                 struct lpfc_iocbq *cmdiocb)
 436 {
 437         struct Scsi_Host   *shost = lpfc_shost_from_vport(vport);
 438         struct lpfc_dmabuf *pcmd;
 439         struct serv_parm   *sp;
 440         struct lpfc_name   *pnn, *ppn;
 441         struct ls_rjt stat;
 442         ADISC *ap;
 443         IOCB_t *icmd;
 444         uint32_t *lp;
 445         uint32_t cmd;
 446
 447         pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
 448         lp = (uint32_t *) pcmd->virt;
 449
 450         cmd = *lp++;
 451         if (cmd == ELS_CMD_ADISC) {
 452                 ap = (ADISC *) lp;
 453                 pnn = (struct lpfc_name *) & ap->nodeName;
 454                 ppn = (struct lpfc_name *) & ap->portName;
 455         } else {
 456                 sp = (struct serv_parm *) lp;
 457                 pnn = (struct lpfc_name *) & sp->nodeName;
 458                 ppn = (struct lpfc_name *) & sp->portName;
 459         }
 460
 461         icmd = &cmdiocb->iocb;
 462         if (icmd->ulpStatus == 0 && lpfc_check_adisc(vport, ndlp, pnn, ppn)) {
 463                 if (cmd == ELS_CMD_ADISC) {
 464                         lpfc_els_rsp_adisc_acc(vport, cmdiocb, ndlp);
 465                 } else {
 466                         lpfc_els_rsp_acc(vport, ELS_CMD_PLOGI, cmdiocb, ndlp,
 467                                          NULL);
 468                 }
 469                 return 1;
 470         }
 471         /* Reject this request because invalid parameters */
 472         stat.un.b.lsRjtRsvd0 = 0;
 473         stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
 474         stat.un.b.lsRjtRsnCodeExp = LSEXP_SPARM_OPTIONS;
 475         stat.un.b.vendorUnique = 0;
 476         lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
 477
 478         /* 1 sec timeout */
 479         mod_timer(&ndlp->nlp_delayfunc, jiffies + HZ);
 480
 481         spin_lock_irq(shost->host_lock);
 482         ndlp->nlp_flag |= NLP_DELAY_TMO;
 483         spin_unlock_irq(shost->host_lock);
 484         ndlp->nlp_last_elscmd = ELS_CMD_PLOGI;
 485         ndlp->nlp_prev_state = ndlp->nlp_state;
 486         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
 487         return 0;
 488 }
 489
 490 static int
 491 lpfc_rcv_logo(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 492               struct lpfc_iocbq *cmdiocb, uint32_t els_cmd)
 493 {
 494         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
 495
 496         /* Put ndlp in NPR state with 1 sec timeout for plogi, ACC logo */
 497         /* Only call LOGO ACC for first LOGO, this avoids sending unnecessary
 498          * PLOGIs during LOGO storms from a device.
 499          */
 500         spin_lock_irq(shost->host_lock);
 501         ndlp->nlp_flag |= NLP_LOGO_ACC;
 502         spin_unlock_irq(shost->host_lock);
 503         if (els_cmd == ELS_CMD_PRLO)
 504                 lpfc_els_rsp_acc(vport, ELS_CMD_PRLO, cmdiocb, ndlp, NULL);
 505         else
 506                 lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
 507         if ((ndlp->nlp_DID == Fabric_DID) &&
 508                 vport->port_type == LPFC_NPIV_PORT) {
 509                 lpfc_linkdown_port(vport);
 510                 mod_timer(&ndlp->nlp_delayfunc, jiffies + HZ * 1);
 511                 spin_lock_irq(shost->host_lock);
 512                 ndlp->nlp_flag |= NLP_DELAY_TMO;
 513                 spin_unlock_irq(shost->host_lock);
 514
 515                 ndlp->nlp_last_elscmd = ELS_CMD_FDISC;
 516         } else if ((!(ndlp->nlp_type & NLP_FABRIC) &&
 517                 ((ndlp->nlp_type & NLP_FCP_TARGET) ||
 518                 !(ndlp->nlp_type & NLP_FCP_INITIATOR))) ||
 519                 (ndlp->nlp_state == NLP_STE_ADISC_ISSUE)) {
 520                 /* Only try to re-login if this is NOT a Fabric Node */
 521                 mod_timer(&ndlp->nlp_delayfunc, jiffies + HZ * 1);
 522                 spin_lock_irq(shost->host_lock);
 523                 ndlp->nlp_flag |= NLP_DELAY_TMO;
 524                 spin_unlock_irq(shost->host_lock);
 525
 526                 ndlp->nlp_last_elscmd = ELS_CMD_PLOGI;
 527         }
 528         ndlp->nlp_prev_state = ndlp->nlp_state;
 529         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
 530
 531         spin_lock_irq(shost->host_lock);
 532         ndlp->nlp_flag &= ~NLP_NPR_ADISC;
 533         spin_unlock_irq(shost->host_lock);
 534         /* The driver has to wait until the ACC completes before it continues
 535          * processing the LOGO.  The action will resume in
 536          * lpfc_cmpl_els_logo_acc routine. Since part of processing includes an
 537          * unreg_login, the driver waits so the ACC does not get aborted.
 538          */
 539         return 0;
 540 }
 541
 542 static void
 543 lpfc_rcv_prli(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 544               struct lpfc_iocbq *cmdiocb)
 545 {
 546         struct lpfc_dmabuf *pcmd;
 547         uint32_t *lp;
 548         PRLI *npr;
 549         struct fc_rport *rport = ndlp->rport;
 550         u32 roles;
 551
 552         pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
 553         lp = (uint32_t *) pcmd->virt;
 554         npr = (PRLI *) ((uint8_t *) lp + sizeof (uint32_t));
 555
 556         ndlp->nlp_type &= ~(NLP_FCP_TARGET | NLP_FCP_INITIATOR);
 557         ndlp->nlp_fcp_info &= ~NLP_FCP_2_DEVICE;
 558         if (npr->prliType == PRLI_FCP_TYPE) {
 559                 if (npr->initiatorFunc)
 560                         ndlp->nlp_type |= NLP_FCP_INITIATOR;
 561                 if (npr->targetFunc)
 562                         ndlp->nlp_type |= NLP_FCP_TARGET;
 563                 if (npr->Retry)
 564                         ndlp->nlp_fcp_info |= NLP_FCP_2_DEVICE;
 565         }
 566         if (rport) {
 567                 /* We need to update the rport role values */
 568                 roles = FC_RPORT_ROLE_UNKNOWN;
 569                 if (ndlp->nlp_type & NLP_FCP_INITIATOR)
 570                         roles |= FC_RPORT_ROLE_FCP_INITIATOR;
 571                 if (ndlp->nlp_type & NLP_FCP_TARGET)
 572                         roles |= FC_RPORT_ROLE_FCP_TARGET;
 573
 574                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_RPORT,
 575                         "rport rolechg:   role:x%x did:x%x flg:x%x",
 576                         roles, ndlp->nlp_DID, ndlp->nlp_flag);
 577
 578                 fc_remote_port_rolechg(rport, roles);
 579         }
 580 }
 581
 582 static uint32_t
 583 lpfc_disc_set_adisc(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
 584 {
 585         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
 586
 587         if (!(ndlp->nlp_flag & NLP_RPI_VALID)) {
 588                 ndlp->nlp_flag &= ~NLP_NPR_ADISC;
 589                 return 0;
 590         }
 591
 592         if (!(vport->fc_flag & FC_PT2PT)) {
 593                 /* Check config parameter use-adisc or FCP-2 */
 594                 if ((vport->cfg_use_adisc && (vport->fc_flag & FC_RSCN_MODE)) ||
 595                     ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) {
 596                         spin_lock_irq(shost->host_lock);
 597                         ndlp->nlp_flag |= NLP_NPR_ADISC;
 598                         spin_unlock_irq(shost->host_lock);
 599                         return 1;
 600                 }
 601         }
 602         ndlp->nlp_flag &= ~NLP_NPR_ADISC;
 603         lpfc_unreg_rpi(vport, ndlp);
 604         return 0;
 605 }
 606
 607 static uint32_t
 608 lpfc_disc_illegal(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 609                   void *arg, uint32_t evt)
 610 {
 611         lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
 612                          "0271 Illegal State Transition: node x%x "
 613                          "event x%x, state x%x Data: x%x x%x\n",
 614                          ndlp->nlp_DID, evt, ndlp->nlp_state, ndlp->nlp_rpi,
 615                          ndlp->nlp_flag);
 616         return ndlp->nlp_state;
 617 }
 618
 619 static uint32_t
 620 lpfc_cmpl_plogi_illegal(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 621                   void *arg, uint32_t evt)
 622 {
 623         /* This transition is only legal if we previously
 624          * rcv'ed a PLOGI. Since we don't want 2 discovery threads
 625          * working on the same NPortID, do nothing for this thread
 626          * to stop it.
 627          */
 628         if (!(ndlp->nlp_flag & NLP_RCV_PLOGI)) {
 629                 lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
 630                          "0272 Illegal State Transition: node x%x "
 631                          "event x%x, state x%x Data: x%x x%x\n",
 632                          ndlp->nlp_DID, evt, ndlp->nlp_state, ndlp->nlp_rpi,
 633                          ndlp->nlp_flag);
 634         }
 635         return ndlp->nlp_state;
 636 }
 637
 638 /* Start of Discovery State Machine routines */
 639
 640 static uint32_t
 641 lpfc_rcv_plogi_unused_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 642                            void *arg, uint32_t evt)
 643 {
 644         struct lpfc_iocbq *cmdiocb;
 645
 646         cmdiocb = (struct lpfc_iocbq *) arg;
 647
 648         if (lpfc_rcv_plogi(vport, ndlp, cmdiocb)) {
 649                 return ndlp->nlp_state;
 650         }
 651         return NLP_STE_FREED_NODE;
 652 }
 653
 654 static uint32_t
 655 lpfc_rcv_els_unused_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 656                          void *arg, uint32_t evt)
 657 {
 658         lpfc_issue_els_logo(vport, ndlp, 0);
 659         return ndlp->nlp_state;
 660 }
 661
 662 static uint32_t
 663 lpfc_rcv_logo_unused_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 664                           void *arg, uint32_t evt)
 665 {
 666         struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
 667         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
 668
 669         spin_lock_irq(shost->host_lock);
 670         ndlp->nlp_flag |= NLP_LOGO_ACC;
 671         spin_unlock_irq(shost->host_lock);
 672         lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
 673
 674         return ndlp->nlp_state;
 675 }
 676
 677 static uint32_t
 678 lpfc_cmpl_logo_unused_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 679                            void *arg, uint32_t evt)
 680 {
 681         return NLP_STE_FREED_NODE;
 682 }
 683
 684 static uint32_t
 685 lpfc_device_rm_unused_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 686                            void *arg, uint32_t evt)
 687 {
 688         return NLP_STE_FREED_NODE;
 689 }
 690
 691 static uint32_t
 692 lpfc_rcv_plogi_plogi_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 693                            void *arg, uint32_t evt)
 694 {
 695         struct Scsi_Host   *shost = lpfc_shost_from_vport(vport);
 696         struct lpfc_hba   *phba = vport->phba;
 697         struct lpfc_iocbq *cmdiocb = arg;
 698         struct lpfc_dmabuf *pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
 699         uint32_t *lp = (uint32_t *) pcmd->virt;
 700         struct serv_parm *sp = (struct serv_parm *) (lp + 1);
 701         struct ls_rjt stat;
 702         int port_cmp;
 703
 704         memset(&stat, 0, sizeof (struct ls_rjt));
 705
 706         /* For a PLOGI, we only accept if our portname is less
 707          * than the remote portname.
 708          */
 709         phba->fc_stat.elsLogiCol++;
 710         port_cmp = memcmp(&vport->fc_portname, &sp->portName,
 711                           sizeof(struct lpfc_name));
 712
 713         if (port_cmp >= 0) {
 714                 /* Reject this request because the remote node will accept
 715                    ours */
 716                 stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
 717                 stat.un.b.lsRjtRsnCodeExp = LSEXP_CMD_IN_PROGRESS;
 718                 lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp,
 719                         NULL);
 720         } else {
 721                 if (lpfc_rcv_plogi(vport, ndlp, cmdiocb) &&
 722                     (ndlp->nlp_flag & NLP_NPR_2B_DISC) &&
 723                     (vport->num_disc_nodes)) {
 724                         spin_lock_irq(shost->host_lock);
 725                         ndlp->nlp_flag &= ~NLP_NPR_2B_DISC;
 726                         spin_unlock_irq(shost->host_lock);
 727                         /* Check if there are more PLOGIs to be sent */
 728                         lpfc_more_plogi(vport);
 729                         if (vport->num_disc_nodes == 0) {
 730                                 spin_lock_irq(shost->host_lock);
 731                                 vport->fc_flag &= ~FC_NDISC_ACTIVE;
 732                                 spin_unlock_irq(shost->host_lock);
 733                                 lpfc_can_disctmo(vport);
 734                                 lpfc_end_rscn(vport);
 735                         }
 736                 }
 737         } /* If our portname was less */
 738
 739         return ndlp->nlp_state;
 740 }
 741
 742 static uint32_t
 743 lpfc_rcv_prli_plogi_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 744                           void *arg, uint32_t evt)
 745 {
 746         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
 747         struct ls_rjt     stat;
 748
 749         memset(&stat, 0, sizeof (struct ls_rjt));
 750         stat.un.b.lsRjtRsnCode = LSRJT_LOGICAL_BSY;
 751         stat.un.b.lsRjtRsnCodeExp = LSEXP_NOTHING_MORE;
 752         lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
 753         return ndlp->nlp_state;
 754 }
 755
 756 static uint32_t
 757 lpfc_rcv_logo_plogi_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 758                           void *arg, uint32_t evt)
 759 {
 760         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
 761
 762                                 /* software abort outstanding PLOGI */
 763         lpfc_els_abort(vport->phba, ndlp);
 764
 765         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_LOGO);
 766         return ndlp->nlp_state;
 767 }
 768
 769 static uint32_t
 770 lpfc_rcv_els_plogi_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 771                          void *arg, uint32_t evt)
 772 {
 773         struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
 774         struct lpfc_hba   *phba = vport->phba;
 775         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
 776
 777         /* software abort outstanding PLOGI */
 778         lpfc_els_abort(phba, ndlp);
 779
 780         if (evt == NLP_EVT_RCV_LOGO) {
 781                 lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
 782         } else {
 783                 lpfc_issue_els_logo(vport, ndlp, 0);
 784         }
 785
 786         /* Put ndlp in npr state set plogi timer for 1 sec */
 787         mod_timer(&ndlp->nlp_delayfunc, jiffies + HZ * 1);
 788         spin_lock_irq(shost->host_lock);
 789         ndlp->nlp_flag |= NLP_DELAY_TMO;
 790         spin_unlock_irq(shost->host_lock);
 791         ndlp->nlp_last_elscmd = ELS_CMD_PLOGI;
 792         ndlp->nlp_prev_state = NLP_STE_PLOGI_ISSUE;
 793         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
 794
 795         return ndlp->nlp_state;
 796 }
 797
 798 static uint32_t
 799 lpfc_cmpl_plogi_plogi_issue(struct lpfc_vport *vport,
 800                             struct lpfc_nodelist *ndlp,
 801                             void *arg,
 802                             uint32_t evt)
 803 {
 804         struct lpfc_hba    *phba = vport->phba;
 805         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
 806         struct lpfc_iocbq  *cmdiocb, *rspiocb;
 807         struct lpfc_dmabuf *pcmd, *prsp, *mp;
 808         uint32_t *lp;
 809         IOCB_t *irsp;
 810         struct serv_parm *sp;
 811         LPFC_MBOXQ_t *mbox;
 812
 813         cmdiocb = (struct lpfc_iocbq *) arg;
 814         rspiocb = cmdiocb->context_un.rsp_iocb;
 815
 816         if (ndlp->nlp_flag & NLP_ACC_REGLOGIN) {
 817                 /* Recovery from PLOGI collision logic */
 818                 return ndlp->nlp_state;
 819         }
 820
 821         irsp = &rspiocb->iocb;
 822
 823         if (irsp->ulpStatus)
 824                 goto out;
 825
 826         pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
 827
 828         prsp = list_get_first(&pcmd->list, struct lpfc_dmabuf, list);
 829
 830         lp = (uint32_t *) prsp->virt;
 831         sp = (struct serv_parm *) ((uint8_t *) lp + sizeof (uint32_t));
 832
 833         /* Some switches have FDMI servers returning 0 for WWN */
 834         if ((ndlp->nlp_DID != FDMI_DID) &&
 835                 (wwn_to_u64(sp->portName.u.wwn) == 0 ||
 836                 wwn_to_u64(sp->nodeName.u.wwn) == 0)) {
 837                 lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
 838                                  "0142 PLOGI RSP: Invalid WWN.\n");
 839                 goto out;
 840         }
 841         if (!lpfc_check_sparm(vport, ndlp, sp, CLASS3, 0))
 842                 goto out;
 843         /* PLOGI chkparm OK */
 844         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
 845                          "0121 PLOGI chkparm OK Data: x%x x%x x%x x%x\n",
 846                          ndlp->nlp_DID, ndlp->nlp_state,
 847                          ndlp->nlp_flag, ndlp->nlp_rpi);
 848         if (vport->cfg_fcp_class == 2 && (sp->cls2.classValid))
 849                 ndlp->nlp_fcp_info |= CLASS2;
 850         else
 851                 ndlp->nlp_fcp_info |= CLASS3;
 852
 853         ndlp->nlp_class_sup = 0;
 854         if (sp->cls1.classValid)
 855                 ndlp->nlp_class_sup |= FC_COS_CLASS1;
 856         if (sp->cls2.classValid)
 857                 ndlp->nlp_class_sup |= FC_COS_CLASS2;
 858         if (sp->cls3.classValid)
 859                 ndlp->nlp_class_sup |= FC_COS_CLASS3;
 860         if (sp->cls4.classValid)
 861                 ndlp->nlp_class_sup |= FC_COS_CLASS4;
 862         ndlp->nlp_maxframe =
 863                 ((sp->cmn.bbRcvSizeMsb & 0x0F) << 8) | sp->cmn.bbRcvSizeLsb;
 864
 865         mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
 866         if (!mbox) {
 867                 lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
 868                         "0133 PLOGI: no memory for reg_login "
 869                         "Data: x%x x%x x%x x%x\n",
 870                         ndlp->nlp_DID, ndlp->nlp_state,
 871                         ndlp->nlp_flag, ndlp->nlp_rpi);
 872                 goto out;
 873         }
 874
 875         lpfc_unreg_rpi(vport, ndlp);
 876
 877         if (lpfc_reg_rpi(phba, vport->vpi, irsp->un.elsreq64.remoteID,
 878                            (uint8_t *) sp, mbox, 0) == 0) {
 879                 switch (ndlp->nlp_DID) {
 880                 case NameServer_DID:
 881                         mbox->mbox_cmpl = lpfc_mbx_cmpl_ns_reg_login;
 882                         break;
 883                 case FDMI_DID:
 884                         mbox->mbox_cmpl = lpfc_mbx_cmpl_fdmi_reg_login;
 885                         break;
 886                 default:
 887                         mbox->mbox_cmpl = lpfc_mbx_cmpl_reg_login;
 888                 }
 889                 mbox->context2 = lpfc_nlp_get(ndlp);
 890                 mbox->vport = vport;
 891                 if (lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT)
 892                     != MBX_NOT_FINISHED) {
 893                         lpfc_nlp_set_state(vport, ndlp,
 894                                            NLP_STE_REG_LOGIN_ISSUE);
 895                         return ndlp->nlp_state;
 896                 }
 897                 /* decrement node reference count to the failed mbox
 898                  * command
 899                  */
 900                 lpfc_nlp_put(ndlp);
 901                 mp = (struct lpfc_dmabuf *) mbox->context1;
 902                 lpfc_mbuf_free(phba, mp->virt, mp->phys);
 903                 kfree(mp);
 904                 mempool_free(mbox, phba->mbox_mem_pool);
 905
 906                 lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
 907                                  "0134 PLOGI: cannot issue reg_login "
 908                                  "Data: x%x x%x x%x x%x\n",
 909                                  ndlp->nlp_DID, ndlp->nlp_state,
 910                                  ndlp->nlp_flag, ndlp->nlp_rpi);
 911         } else {
 912                 mempool_free(mbox, phba->mbox_mem_pool);
 913
 914                 lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
 915                                  "0135 PLOGI: cannot format reg_login "
 916                                  "Data: x%x x%x x%x x%x\n",
 917                                  ndlp->nlp_DID, ndlp->nlp_state,
 918                                  ndlp->nlp_flag, ndlp->nlp_rpi);
 919         }
 920
 921
 922 out:
 923         if (ndlp->nlp_DID == NameServer_DID) {
 924                 lpfc_vport_set_state(vport, FC_VPORT_FAILED);
 925                 lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
 926                                  "0261 Cannot Register NameServer login\n");
 927         }
 928
 929         spin_lock_irq(shost->host_lock);
 930         ndlp->nlp_flag |= NLP_DEFER_RM;
 931         spin_unlock_irq(shost->host_lock);
 932         return NLP_STE_FREED_NODE;
 933 }
 934
 935 static uint32_t
 936 lpfc_cmpl_logo_plogi_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 937                            void *arg, uint32_t evt)
 938 {
 939         return ndlp->nlp_state;
 940 }
 941
 942 static uint32_t
 943 lpfc_cmpl_reglogin_plogi_issue(struct lpfc_vport *vport,
 944         struct lpfc_nodelist *ndlp, void *arg, uint32_t evt)
 945 {
 946         return ndlp->nlp_state;
 947 }
 948
 949 static uint32_t
 950 lpfc_device_rm_plogi_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 951                            void *arg, uint32_t evt)
 952 {
 953         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
 954
 955         if (ndlp->nlp_flag & NLP_NPR_2B_DISC) {
 956                 spin_lock_irq(shost->host_lock);
 957                 ndlp->nlp_flag |= NLP_NODEV_REMOVE;
 958                 spin_unlock_irq(shost->host_lock);
 959                 return ndlp->nlp_state;
 960         } else {
 961                 /* software abort outstanding PLOGI */
 962                 lpfc_els_abort(vport->phba, ndlp);
 963
 964                 lpfc_drop_node(vport, ndlp);
 965                 return NLP_STE_FREED_NODE;
 966         }
 967 }
 968
 969 static uint32_t
 970 lpfc_device_recov_plogi_issue(struct lpfc_vport *vport,
 971                               struct lpfc_nodelist *ndlp,
 972                               void *arg,
 973                               uint32_t evt)
 974 {
 975         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
 976         struct lpfc_hba  *phba = vport->phba;
 977
 978         /* Don't do anything that will mess up processing of the
 979          * previous RSCN.
 980          */
 981         if (vport->fc_flag & FC_RSCN_DEFERRED)
 982                 return ndlp->nlp_state;
 983
 984         /* software abort outstanding PLOGI */
 985         lpfc_els_abort(phba, ndlp);
 986
 987         ndlp->nlp_prev_state = NLP_STE_PLOGI_ISSUE;
 988         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
 989         spin_lock_irq(shost->host_lock);
 990         ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
 991         spin_unlock_irq(shost->host_lock);
 992
 993         return ndlp->nlp_state;
 994 }
 995
 996 static uint32_t
 997 lpfc_rcv_plogi_adisc_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 998                            void *arg, uint32_t evt)
 999 {
1000         struct Scsi_Host   *shost = lpfc_shost_from_vport(vport);
1001         struct lpfc_hba   *phba = vport->phba;
1002         struct lpfc_iocbq *cmdiocb;
1003
1004         /* software abort outstanding ADISC */
1005         lpfc_els_abort(phba, ndlp);
1006
1007         cmdiocb = (struct lpfc_iocbq *) arg;
1008
1009         if (lpfc_rcv_plogi(vport, ndlp, cmdiocb)) {
1010                 if (ndlp->nlp_flag & NLP_NPR_2B_DISC) {
1011                         spin_lock_irq(shost->host_lock);
1012                         ndlp->nlp_flag &= ~NLP_NPR_2B_DISC;
1013                         spin_unlock_irq(shost->host_lock);
1014                         if (vport->num_disc_nodes)
1015                                 lpfc_more_adisc(vport);
1016                 }
1017                 return ndlp->nlp_state;
1018         }
1019         ndlp->nlp_prev_state = NLP_STE_ADISC_ISSUE;
1020         lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0);
1021         lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
1022
1023         return ndlp->nlp_state;
1024 }
1025
1026 static uint32_t
1027 lpfc_rcv_prli_adisc_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1028                           void *arg, uint32_t evt)
1029 {
1030         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1031
1032         lpfc_els_rsp_prli_acc(vport, cmdiocb, ndlp);
1033         return ndlp->nlp_state;
1034 }
1035
1036 static uint32_t
1037 lpfc_rcv_logo_adisc_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1038                           void *arg, uint32_t evt)
1039 {
1040         struct lpfc_hba *phba = vport->phba;
1041         struct lpfc_iocbq *cmdiocb;
1042
1043         cmdiocb = (struct lpfc_iocbq *) arg;
1044
1045         /* software abort outstanding ADISC */
1046         lpfc_els_abort(phba, ndlp);
1047
1048         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_LOGO);
1049         return ndlp->nlp_state;
1050 }
1051
1052 static uint32_t
1053 lpfc_rcv_padisc_adisc_issue(struct lpfc_vport *vport,
1054                             struct lpfc_nodelist *ndlp,
1055                             void *arg, uint32_t evt)
1056 {
1057         struct lpfc_iocbq *cmdiocb;
1058
1059         cmdiocb = (struct lpfc_iocbq *) arg;
1060
1061         lpfc_rcv_padisc(vport, ndlp, cmdiocb);
1062         return ndlp->nlp_state;
1063 }
1064
1065 static uint32_t
1066 lpfc_rcv_prlo_adisc_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1067                           void *arg, uint32_t evt)
1068 {
1069         struct lpfc_iocbq *cmdiocb;
1070
1071         cmdiocb = (struct lpfc_iocbq *) arg;
1072
1073         /* Treat like rcv logo */
1074         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_PRLO);
1075         return ndlp->nlp_state;
1076 }
1077
1078 static uint32_t
1079 lpfc_cmpl_adisc_adisc_issue(struct lpfc_vport *vport,
1080                             struct lpfc_nodelist *ndlp,
1081                             void *arg, uint32_t evt)
1082 {
1083         struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
1084         struct lpfc_hba   *phba = vport->phba;
1085         struct lpfc_iocbq *cmdiocb, *rspiocb;
1086         IOCB_t *irsp;
1087         ADISC *ap;
1088         int rc;
1089
1090         cmdiocb = (struct lpfc_iocbq *) arg;
1091         rspiocb = cmdiocb->context_un.rsp_iocb;
1092
1093         ap = (ADISC *)lpfc_check_elscmpl_iocb(phba, cmdiocb, rspiocb);
1094         irsp = &rspiocb->iocb;
1095
1096         if ((irsp->ulpStatus) ||
1097             (!lpfc_check_adisc(vport, ndlp, &ap->nodeName, &ap->portName))) {
1098                 /* 1 sec timeout */
1099                 mod_timer(&ndlp->nlp_delayfunc, jiffies + HZ);
1100                 spin_lock_irq(shost->host_lock);
1101                 ndlp->nlp_flag |= NLP_DELAY_TMO;
1102                 spin_unlock_irq(shost->host_lock);
1103                 ndlp->nlp_last_elscmd = ELS_CMD_PLOGI;
1104
1105                 memset(&ndlp->nlp_nodename, 0, sizeof(struct lpfc_name));
1106                 memset(&ndlp->nlp_portname, 0, sizeof(struct lpfc_name));
1107
1108                 ndlp->nlp_prev_state = NLP_STE_ADISC_ISSUE;
1109                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1110                 lpfc_unreg_rpi(vport, ndlp);
1111                 return ndlp->nlp_state;
1112         }
1113
1114         if (phba->sli_rev == LPFC_SLI_REV4) {
1115                 rc = lpfc_sli4_resume_rpi(ndlp);
1116                 if (rc) {
1117                         /* Stay in state and retry. */
1118                         ndlp->nlp_prev_state = NLP_STE_ADISC_ISSUE;
1119                         return ndlp->nlp_state;
1120                 }
1121         }
1122
1123         if (ndlp->nlp_type & NLP_FCP_TARGET) {
1124                 ndlp->nlp_prev_state = NLP_STE_ADISC_ISSUE;
1125                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_MAPPED_NODE);
1126         } else {
1127                 ndlp->nlp_prev_state = NLP_STE_ADISC_ISSUE;
1128                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
1129         }
1130
1131         return ndlp->nlp_state;
1132 }
1133
1134 static uint32_t
1135 lpfc_device_rm_adisc_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1136                            void *arg, uint32_t evt)
1137 {
1138         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1139
1140         if (ndlp->nlp_flag & NLP_NPR_2B_DISC) {
1141                 spin_lock_irq(shost->host_lock);
1142                 ndlp->nlp_flag |= NLP_NODEV_REMOVE;
1143                 spin_unlock_irq(shost->host_lock);
1144                 return ndlp->nlp_state;
1145         } else {
1146                 /* software abort outstanding ADISC */
1147                 lpfc_els_abort(vport->phba, ndlp);
1148
1149                 lpfc_drop_node(vport, ndlp);
1150                 return NLP_STE_FREED_NODE;
1151         }
1152 }
1153
1154 static uint32_t
1155 lpfc_device_recov_adisc_issue(struct lpfc_vport *vport,
1156                               struct lpfc_nodelist *ndlp,
1157                               void *arg,
1158                               uint32_t evt)
1159 {
1160         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1161         struct lpfc_hba  *phba = vport->phba;
1162
1163         /* Don't do anything that will mess up processing of the
1164          * previous RSCN.
1165          */
1166         if (vport->fc_flag & FC_RSCN_DEFERRED)
1167                 return ndlp->nlp_state;
1168
1169         /* software abort outstanding ADISC */
1170         lpfc_els_abort(phba, ndlp);
1171
1172         ndlp->nlp_prev_state = NLP_STE_ADISC_ISSUE;
1173         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1174         spin_lock_irq(shost->host_lock);
1175         ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
1176         spin_unlock_irq(shost->host_lock);
1177         lpfc_disc_set_adisc(vport, ndlp);
1178         return ndlp->nlp_state;
1179 }
1180
1181 static uint32_t
1182 lpfc_rcv_plogi_reglogin_issue(struct lpfc_vport *vport,
1183                               struct lpfc_nodelist *ndlp,
1184                               void *arg,
1185                               uint32_t evt)
1186 {
1187         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1188
1189         lpfc_rcv_plogi(vport, ndlp, cmdiocb);
1190         return ndlp->nlp_state;
1191 }
1192
1193 static uint32_t
1194 lpfc_rcv_prli_reglogin_issue(struct lpfc_vport *vport,
1195                              struct lpfc_nodelist *ndlp,
1196                              void *arg,
1197                              uint32_t evt)
1198 {
1199         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1200
1201         lpfc_els_rsp_prli_acc(vport, cmdiocb, ndlp);
1202         return ndlp->nlp_state;
1203 }
1204
1205 static uint32_t
1206 lpfc_rcv_logo_reglogin_issue(struct lpfc_vport *vport,
1207                              struct lpfc_nodelist *ndlp,
1208                              void *arg,
1209                              uint32_t evt)
1210 {
1211         struct lpfc_hba   *phba = vport->phba;
1212         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1213         LPFC_MBOXQ_t      *mb;
1214         LPFC_MBOXQ_t      *nextmb;
1215         struct lpfc_dmabuf *mp;
1216
1217         cmdiocb = (struct lpfc_iocbq *) arg;
1218
1219         /* cleanup any ndlp on mbox q waiting for reglogin cmpl */
1220         if ((mb = phba->sli.mbox_active)) {
1221                 if ((mb->u.mb.mbxCommand == MBX_REG_LOGIN64) &&
1222                    (ndlp == (struct lpfc_nodelist *) mb->context2)) {
1223                         lpfc_nlp_put(ndlp);
1224                         mb->context2 = NULL;
1225                         mb->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
1226                 }
1227         }
1228
1229         spin_lock_irq(&phba->hbalock);
1230         list_for_each_entry_safe(mb, nextmb, &phba->sli.mboxq, list) {
1231                 if ((mb->u.mb.mbxCommand == MBX_REG_LOGIN64) &&
1232                    (ndlp == (struct lpfc_nodelist *) mb->context2)) {
1233                         if (phba->sli_rev == LPFC_SLI_REV4) {
1234                                 spin_unlock_irq(&phba->hbalock);
1235                                 lpfc_sli4_free_rpi(phba,
1236                                         mb->u.mb.un.varRegLogin.rpi);
1237                                 spin_lock_irq(&phba->hbalock);
1238                         }
1239                         mp = (struct lpfc_dmabuf *) (mb->context1);
1240                         if (mp) {
1241                                 __lpfc_mbuf_free(phba, mp->virt, mp->phys);
1242                                 kfree(mp);
1243                         }
1244                         lpfc_nlp_put(ndlp);
1245                         list_del(&mb->list);
1246                         phba->sli.mboxq_cnt--;
1247                         mempool_free(mb, phba->mbox_mem_pool);
1248                 }
1249         }
1250         spin_unlock_irq(&phba->hbalock);
1251
1252         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_LOGO);
1253         return ndlp->nlp_state;
1254 }
1255
1256 static uint32_t
1257 lpfc_rcv_padisc_reglogin_issue(struct lpfc_vport *vport,
1258                                struct lpfc_nodelist *ndlp,
1259                                void *arg,
1260                                uint32_t evt)
1261 {
1262         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1263
1264         lpfc_rcv_padisc(vport, ndlp, cmdiocb);
1265         return ndlp->nlp_state;
1266 }
1267
1268 static uint32_t
1269 lpfc_rcv_prlo_reglogin_issue(struct lpfc_vport *vport,
1270                              struct lpfc_nodelist *ndlp,
1271                              void *arg,
1272                              uint32_t evt)
1273 {
1274         struct lpfc_iocbq *cmdiocb;
1275
1276         cmdiocb = (struct lpfc_iocbq *) arg;
1277         lpfc_els_rsp_acc(vport, ELS_CMD_PRLO, cmdiocb, ndlp, NULL);
1278         return ndlp->nlp_state;
1279 }
1280
1281 static uint32_t
1282 lpfc_cmpl_reglogin_reglogin_issue(struct lpfc_vport *vport,
1283                                   struct lpfc_nodelist *ndlp,
1284                                   void *arg,
1285                                   uint32_t evt)
1286 {
1287         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1288         LPFC_MBOXQ_t *pmb = (LPFC_MBOXQ_t *) arg;
1289         MAILBOX_t *mb = &pmb->u.mb;
1290         uint32_t did  = mb->un.varWords[1];
1291
1292         if (mb->mbxStatus) {
1293                 /* RegLogin failed */
1294                 lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
1295                                 "0246 RegLogin failed Data: x%x x%x x%x\n",
1296                                 did, mb->mbxStatus, vport->port_state);
1297                 /*
1298                  * If RegLogin failed due to lack of HBA resources do not
1299                  * retry discovery.
1300                  */
1301                 if (mb->mbxStatus == MBXERR_RPI_FULL) {
1302                         ndlp->nlp_prev_state = NLP_STE_REG_LOGIN_ISSUE;
1303                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1304                         return ndlp->nlp_state;
1305                 }
1306
1307                 /* Put ndlp in npr state set plogi timer for 1 sec */
1308                 mod_timer(&ndlp->nlp_delayfunc, jiffies + HZ * 1);
1309                 spin_lock_irq(shost->host_lock);
1310                 ndlp->nlp_flag |= NLP_DELAY_TMO;
1311                 spin_unlock_irq(shost->host_lock);
1312                 ndlp->nlp_last_elscmd = ELS_CMD_PLOGI;
1313
1314                 lpfc_issue_els_logo(vport, ndlp, 0);
1315                 ndlp->nlp_prev_state = NLP_STE_REG_LOGIN_ISSUE;
1316                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1317                 return ndlp->nlp_state;
1318         }
1319
1320         ndlp->nlp_rpi = mb->un.varWords[0];
1321         ndlp->nlp_flag |= NLP_RPI_VALID;
1322
1323         /* Only if we are not a fabric nport do we issue PRLI */
1324         if (!(ndlp->nlp_type & NLP_FABRIC)) {
1325                 ndlp->nlp_prev_state = NLP_STE_REG_LOGIN_ISSUE;
1326                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_PRLI_ISSUE);
1327                 lpfc_issue_els_prli(vport, ndlp, 0);
1328         } else {
1329                 ndlp->nlp_prev_state = NLP_STE_REG_LOGIN_ISSUE;
1330                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
1331         }
1332         return ndlp->nlp_state;
1333 }
1334
1335 static uint32_t
1336 lpfc_device_rm_reglogin_issue(struct lpfc_vport *vport,
1337                               struct lpfc_nodelist *ndlp,
1338                               void *arg,
1339                               uint32_t evt)
1340 {
1341         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1342
1343         if (ndlp->nlp_flag & NLP_NPR_2B_DISC) {
1344                 spin_lock_irq(shost->host_lock);
1345                 ndlp->nlp_flag |= NLP_NODEV_REMOVE;
1346                 spin_unlock_irq(shost->host_lock);
1347                 return ndlp->nlp_state;
1348         } else {
1349                 lpfc_drop_node(vport, ndlp);
1350                 return NLP_STE_FREED_NODE;
1351         }
1352 }
1353
1354 static uint32_t
1355 lpfc_device_recov_reglogin_issue(struct lpfc_vport *vport,
1356                                  struct lpfc_nodelist *ndlp,
1357                                  void *arg,
1358                                  uint32_t evt)
1359 {
1360         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1361
1362         /* Don't do anything that will mess up processing of the
1363          * previous RSCN.
1364          */
1365         if (vport->fc_flag & FC_RSCN_DEFERRED)
1366                 return ndlp->nlp_state;
1367
1368         ndlp->nlp_prev_state = NLP_STE_REG_LOGIN_ISSUE;
1369         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1370         spin_lock_irq(shost->host_lock);
1371         ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
1372         spin_unlock_irq(shost->host_lock);
1373         lpfc_disc_set_adisc(vport, ndlp);
1374         return ndlp->nlp_state;
1375 }
1376
1377 static uint32_t
1378 lpfc_rcv_plogi_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1379                           void *arg, uint32_t evt)
1380 {
1381         struct lpfc_iocbq *cmdiocb;
1382
1383         cmdiocb = (struct lpfc_iocbq *) arg;
1384
1385         lpfc_rcv_plogi(vport, ndlp, cmdiocb);
1386         return ndlp->nlp_state;
1387 }
1388
1389 static uint32_t
1390 lpfc_rcv_prli_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1391                          void *arg, uint32_t evt)
1392 {
1393         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1394
1395         lpfc_els_rsp_prli_acc(vport, cmdiocb, ndlp);
1396         return ndlp->nlp_state;
1397 }
1398
1399 static uint32_t
1400 lpfc_rcv_logo_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1401                          void *arg, uint32_t evt)
1402 {
1403         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1404
1405         /* Software abort outstanding PRLI before sending acc */
1406         lpfc_els_abort(vport->phba, ndlp);
1407
1408         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_LOGO);
1409         return ndlp->nlp_state;
1410 }
1411
1412 static uint32_t
1413 lpfc_rcv_padisc_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1414                            void *arg, uint32_t evt)
1415 {
1416         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1417
1418         lpfc_rcv_padisc(vport, ndlp, cmdiocb);
1419         return ndlp->nlp_state;
1420 }
1421
1422 /* This routine is envoked when we rcv a PRLO request from a nport
1423  * we are logged into.  We should send back a PRLO rsp setting the
1424  * appropriate bits.
1425  * NEXT STATE = PRLI_ISSUE
1426  */
1427 static uint32_t
1428 lpfc_rcv_prlo_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1429                          void *arg, uint32_t evt)
1430 {
1431         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1432
1433         lpfc_els_rsp_acc(vport, ELS_CMD_PRLO, cmdiocb, ndlp, NULL);
1434         return ndlp->nlp_state;
1435 }
1436
1437 static uint32_t
1438 lpfc_cmpl_prli_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1439                           void *arg, uint32_t evt)
1440 {
1441         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1442         struct lpfc_iocbq *cmdiocb, *rspiocb;
1443         struct lpfc_hba   *phba = vport->phba;
1444         IOCB_t *irsp;
1445         PRLI *npr;
1446
1447         cmdiocb = (struct lpfc_iocbq *) arg;
1448         rspiocb = cmdiocb->context_un.rsp_iocb;
1449         npr = (PRLI *)lpfc_check_elscmpl_iocb(phba, cmdiocb, rspiocb);
1450
1451         irsp = &rspiocb->iocb;
1452         if (irsp->ulpStatus) {
1453                 if ((vport->port_type == LPFC_NPIV_PORT) &&
1454                     vport->cfg_restrict_login) {
1455                         goto out;
1456                 }
1457                 ndlp->nlp_prev_state = NLP_STE_PRLI_ISSUE;
1458                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
1459                 return ndlp->nlp_state;
1460         }
1461
1462         /* Check out PRLI rsp */
1463         ndlp->nlp_type &= ~(NLP_FCP_TARGET | NLP_FCP_INITIATOR);
1464         ndlp->nlp_fcp_info &= ~NLP_FCP_2_DEVICE;
1465         if ((npr->acceptRspCode == PRLI_REQ_EXECUTED) &&
1466             (npr->prliType == PRLI_FCP_TYPE)) {
1467                 if (npr->initiatorFunc)
1468                         ndlp->nlp_type |= NLP_FCP_INITIATOR;
1469                 if (npr->targetFunc)
1470                         ndlp->nlp_type |= NLP_FCP_TARGET;
1471                 if (npr->Retry)
1472                         ndlp->nlp_fcp_info |= NLP_FCP_2_DEVICE;
1473         }
1474         if (!(ndlp->nlp_type & NLP_FCP_TARGET) &&
1475             (vport->port_type == LPFC_NPIV_PORT) &&
1476              vport->cfg_restrict_login) {
1477 out:
1478                 spin_lock_irq(shost->host_lock);
1479                 ndlp->nlp_flag |= NLP_TARGET_REMOVE;
1480                 spin_unlock_irq(shost->host_lock);
1481                 lpfc_issue_els_logo(vport, ndlp, 0);
1482
1483                 ndlp->nlp_prev_state = NLP_STE_PRLI_ISSUE;
1484                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1485                 return ndlp->nlp_state;
1486         }
1487
1488         ndlp->nlp_prev_state = NLP_STE_PRLI_ISSUE;
1489         if (ndlp->nlp_type & NLP_FCP_TARGET)
1490                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_MAPPED_NODE);
1491         else
1492                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
1493         return ndlp->nlp_state;
1494 }
1495
1496 /*! lpfc_device_rm_prli_issue
1497  *
1498  * \pre
1499  * \post
1500  * \param   phba
1501  * \param   ndlp
1502  * \param   arg
1503  * \param   evt
1504  * \return  uint32_t
1505  *
1506  * \b Description:
1507  *    This routine is envoked when we a request to remove a nport we are in the
1508  *    process of PRLIing. We should software abort outstanding prli, unreg
1509  *    login, send a logout. We will change node state to UNUSED_NODE, put it
1510  *    on plogi list so it can be freed when LOGO completes.
1511  *
1512  */
1513
1514 static uint32_t
1515 lpfc_device_rm_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1516                           void *arg, uint32_t evt)
1517 {
1518         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1519
1520         if (ndlp->nlp_flag & NLP_NPR_2B_DISC) {
1521                 spin_lock_irq(shost->host_lock);
1522                 ndlp->nlp_flag |= NLP_NODEV_REMOVE;
1523                 spin_unlock_irq(shost->host_lock);
1524                 return ndlp->nlp_state;
1525         } else {
1526                 /* software abort outstanding PLOGI */
1527                 lpfc_els_abort(vport->phba, ndlp);
1528
1529                 lpfc_drop_node(vport, ndlp);
1530                 return NLP_STE_FREED_NODE;
1531         }
1532 }
1533
1534
1535 /*! lpfc_device_recov_prli_issue
1536  *
1537  * \pre
1538  * \post
1539  * \param   phba
1540  * \param   ndlp
1541  * \param   arg
1542  * \param   evt
1543  * \return  uint32_t
1544  *
1545  * \b Description:
1546  *    The routine is envoked when the state of a device is unknown, like
1547  *    during a link down. We should remove the nodelist entry from the
1548  *    unmapped list, issue a UNREG_LOGIN, do a software abort of the
1549  *    outstanding PRLI command, then free the node entry.
1550  */
1551 static uint32_t
1552 lpfc_device_recov_prli_issue(struct lpfc_vport *vport,
1553                              struct lpfc_nodelist *ndlp,
1554                              void *arg,
1555                              uint32_t evt)
1556 {
1557         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1558         struct lpfc_hba  *phba = vport->phba;
1559
1560         /* Don't do anything that will mess up processing of the
1561          * previous RSCN.
1562          */
1563         if (vport->fc_flag & FC_RSCN_DEFERRED)
1564                 return ndlp->nlp_state;
1565
1566         /* software abort outstanding PRLI */
1567         lpfc_els_abort(phba, ndlp);
1568
1569         ndlp->nlp_prev_state = NLP_STE_PRLI_ISSUE;
1570         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1571         spin_lock_irq(shost->host_lock);
1572         ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
1573         spin_unlock_irq(shost->host_lock);
1574         lpfc_disc_set_adisc(vport, ndlp);
1575         return ndlp->nlp_state;
1576 }
1577
1578 static uint32_t
1579 lpfc_rcv_plogi_unmap_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1580                           void *arg, uint32_t evt)
1581 {
1582         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1583
1584         lpfc_rcv_plogi(vport, ndlp, cmdiocb);
1585         return ndlp->nlp_state;
1586 }
1587
1588 static uint32_t
1589 lpfc_rcv_prli_unmap_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1590                          void *arg, uint32_t evt)
1591 {
1592         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1593
1594         lpfc_rcv_prli(vport, ndlp, cmdiocb);
1595         lpfc_els_rsp_prli_acc(vport, cmdiocb, ndlp);
1596         return ndlp->nlp_state;
1597 }
1598
1599 static uint32_t
1600 lpfc_rcv_logo_unmap_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1601                          void *arg, uint32_t evt)
1602 {
1603         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1604
1605         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_LOGO);
1606         return ndlp->nlp_state;
1607 }
1608
1609 static uint32_t
1610 lpfc_rcv_padisc_unmap_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1611                            void *arg, uint32_t evt)
1612 {
1613         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1614
1615         lpfc_rcv_padisc(vport, ndlp, cmdiocb);
1616         return ndlp->nlp_state;
1617 }
1618
1619 static uint32_t
1620 lpfc_rcv_prlo_unmap_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1621                          void *arg, uint32_t evt)
1622 {
1623         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1624
1625         lpfc_els_rsp_acc(vport, ELS_CMD_PRLO, cmdiocb, ndlp, NULL);
1626         return ndlp->nlp_state;
1627 }
1628
1629 static uint32_t
1630 lpfc_device_recov_unmap_node(struct lpfc_vport *vport,
1631                              struct lpfc_nodelist *ndlp,
1632                              void *arg,
1633                              uint32_t evt)
1634 {
1635         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1636
1637         ndlp->nlp_prev_state = NLP_STE_UNMAPPED_NODE;
1638         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1639         spin_lock_irq(shost->host_lock);
1640         ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
1641         spin_unlock_irq(shost->host_lock);
1642         lpfc_disc_set_adisc(vport, ndlp);
1643
1644         return ndlp->nlp_state;
1645 }
1646
1647 static uint32_t
1648 lpfc_rcv_plogi_mapped_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1649                            void *arg, uint32_t evt)
1650 {
1651         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1652
1653         lpfc_rcv_plogi(vport, ndlp, cmdiocb);
1654         return ndlp->nlp_state;
1655 }
1656
1657 static uint32_t
1658 lpfc_rcv_prli_mapped_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1659                           void *arg, uint32_t evt)
1660 {
1661         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1662
1663         lpfc_els_rsp_prli_acc(vport, cmdiocb, ndlp);
1664         return ndlp->nlp_state;
1665 }
1666
1667 static uint32_t
1668 lpfc_rcv_logo_mapped_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1669                           void *arg, uint32_t evt)
1670 {
1671         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1672
1673         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_LOGO);
1674         return ndlp->nlp_state;
1675 }
1676
1677 static uint32_t
1678 lpfc_rcv_padisc_mapped_node(struct lpfc_vport *vport,
1679                             struct lpfc_nodelist *ndlp,
1680                             void *arg, uint32_t evt)
1681 {
1682         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1683
1684         lpfc_rcv_padisc(vport, ndlp, cmdiocb);
1685         return ndlp->nlp_state;
1686 }
1687
1688 static uint32_t
1689 lpfc_rcv_prlo_mapped_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1690                           void *arg, uint32_t evt)
1691 {
1692         struct lpfc_hba  *phba = vport->phba;
1693         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1694
1695         /* flush the target */
1696         lpfc_sli_abort_iocb(vport, &phba->sli.ring[phba->sli.fcp_ring],
1697                             ndlp->nlp_sid, 0, LPFC_CTX_TGT);
1698
1699         /* Treat like rcv logo */
1700         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_PRLO);
1701         return ndlp->nlp_state;
1702 }
1703
1704 static uint32_t
1705 lpfc_device_recov_mapped_node(struct lpfc_vport *vport,
1706                               struct lpfc_nodelist *ndlp,
1707                               void *arg,
1708                               uint32_t evt)
1709 {
1710         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1711
1712         ndlp->nlp_prev_state = NLP_STE_MAPPED_NODE;
1713         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1714         spin_lock_irq(shost->host_lock);
1715         ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
1716         spin_unlock_irq(shost->host_lock);
1717         lpfc_disc_set_adisc(vport, ndlp);
1718         return ndlp->nlp_state;
1719 }
1720
1721 static uint32_t
1722 lpfc_rcv_plogi_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1723                         void *arg, uint32_t evt)
1724 {
1725         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1726         struct lpfc_iocbq *cmdiocb  = (struct lpfc_iocbq *) arg;
1727
1728         /* Ignore PLOGI if we have an outstanding LOGO */
1729         if (ndlp->nlp_flag & (NLP_LOGO_SND | NLP_LOGO_ACC))
1730                 return ndlp->nlp_state;
1731         if (lpfc_rcv_plogi(vport, ndlp, cmdiocb)) {
1732                 lpfc_cancel_retry_delay_tmo(vport, ndlp);
1733                 spin_lock_irq(shost->host_lock);
1734                 ndlp->nlp_flag &= ~(NLP_NPR_ADISC | NLP_NPR_2B_DISC);
1735                 spin_unlock_irq(shost->host_lock);
1736         } else if (!(ndlp->nlp_flag & NLP_NPR_2B_DISC)) {
1737                 /* send PLOGI immediately, move to PLOGI issue state */
1738                 if (!(ndlp->nlp_flag & NLP_DELAY_TMO)) {
1739                         ndlp->nlp_prev_state = NLP_STE_NPR_NODE;
1740                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
1741                         lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0);
1742                 }
1743         }
1744         return ndlp->nlp_state;
1745 }
1746
1747 static uint32_t
1748 lpfc_rcv_prli_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1749                        void *arg, uint32_t evt)
1750 {
1751         struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
1752         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1753         struct ls_rjt     stat;
1754
1755         memset(&stat, 0, sizeof (struct ls_rjt));
1756         stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
1757         stat.un.b.lsRjtRsnCodeExp = LSEXP_NOTHING_MORE;
1758         lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
1759
1760         if (!(ndlp->nlp_flag & NLP_DELAY_TMO)) {
1761                 if (ndlp->nlp_flag & NLP_NPR_ADISC) {
1762                         spin_lock_irq(shost->host_lock);
1763                         ndlp->nlp_flag &= ~NLP_NPR_ADISC;
1764                         ndlp->nlp_prev_state = NLP_STE_NPR_NODE;
1765                         spin_unlock_irq(shost->host_lock);
1766                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_ADISC_ISSUE);
1767                         lpfc_issue_els_adisc(vport, ndlp, 0);
1768                 } else {
1769                         ndlp->nlp_prev_state = NLP_STE_NPR_NODE;
1770                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
1771                         lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0);
1772                 }
1773         }
1774         return ndlp->nlp_state;
1775 }
1776
1777 static uint32_t
1778 lpfc_rcv_logo_npr_node(struct lpfc_vport *vport,  struct lpfc_nodelist *ndlp,
1779                        void *arg, uint32_t evt)
1780 {
1781         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1782
1783         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_LOGO);
1784         return ndlp->nlp_state;
1785 }
1786
1787 static uint32_t
1788 lpfc_rcv_padisc_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1789                          void *arg, uint32_t evt)
1790 {
1791         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1792
1793         lpfc_rcv_padisc(vport, ndlp, cmdiocb);
1794         /*
1795          * Do not start discovery if discovery is about to start
1796          * or discovery in progress for this node. Starting discovery
1797          * here will affect the counting of discovery threads.
1798          */
1799         if (!(ndlp->nlp_flag & NLP_DELAY_TMO) &&
1800             !(ndlp->nlp_flag & NLP_NPR_2B_DISC)) {
1801                 if (ndlp->nlp_flag & NLP_NPR_ADISC) {
1802                         ndlp->nlp_flag &= ~NLP_NPR_ADISC;
1803                         ndlp->nlp_prev_state = NLP_STE_NPR_NODE;
1804                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_ADISC_ISSUE);
1805                         lpfc_issue_els_adisc(vport, ndlp, 0);
1806                 } else {
1807                         ndlp->nlp_prev_state = NLP_STE_NPR_NODE;
1808                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
1809                         lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0);
1810                 }
1811         }
1812         return ndlp->nlp_state;
1813 }
1814
1815 static uint32_t
1816 lpfc_rcv_prlo_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1817                        void *arg, uint32_t evt)
1818 {
1819         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1820         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1821
1822         spin_lock_irq(shost->host_lock);
1823         ndlp->nlp_flag |= NLP_LOGO_ACC;
1824         spin_unlock_irq(shost->host_lock);
1825
1826         lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
1827
1828         if ((ndlp->nlp_flag & NLP_DELAY_TMO) == 0) {
1829                 mod_timer(&ndlp->nlp_delayfunc, jiffies + HZ * 1);
1830                 spin_lock_irq(shost->host_lock);
1831                 ndlp->nlp_flag |= NLP_DELAY_TMO;
1832                 ndlp->nlp_flag &= ~NLP_NPR_ADISC;
1833                 spin_unlock_irq(shost->host_lock);
1834                 ndlp->nlp_last_elscmd = ELS_CMD_PLOGI;
1835         } else {
1836                 spin_lock_irq(shost->host_lock);
1837                 ndlp->nlp_flag &= ~NLP_NPR_ADISC;
1838                 spin_unlock_irq(shost->host_lock);
1839         }
1840         return ndlp->nlp_state;
1841 }
1842
1843 static uint32_t
1844 lpfc_cmpl_plogi_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1845                          void *arg, uint32_t evt)
1846 {
1847         struct lpfc_iocbq *cmdiocb, *rspiocb;
1848         IOCB_t *irsp;
1849
1850         cmdiocb = (struct lpfc_iocbq *) arg;
1851         rspiocb = cmdiocb->context_un.rsp_iocb;
1852
1853         irsp = &rspiocb->iocb;
1854         if (irsp->ulpStatus) {
1855                 ndlp->nlp_flag |= NLP_DEFER_RM;
1856                 return NLP_STE_FREED_NODE;
1857         }
1858         return ndlp->nlp_state;
1859 }
1860
1861 static uint32_t
1862 lpfc_cmpl_prli_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1863                         void *arg, uint32_t evt)
1864 {
1865         struct lpfc_iocbq *cmdiocb, *rspiocb;
1866         IOCB_t *irsp;
1867
1868         cmdiocb = (struct lpfc_iocbq *) arg;
1869         rspiocb = cmdiocb->context_un.rsp_iocb;
1870
1871         irsp = &rspiocb->iocb;
1872         if (irsp->ulpStatus && (ndlp->nlp_flag & NLP_NODEV_REMOVE)) {
1873                 lpfc_drop_node(vport, ndlp);
1874                 return NLP_STE_FREED_NODE;
1875         }
1876         return ndlp->nlp_state;
1877 }
1878
1879 static uint32_t
1880 lpfc_cmpl_logo_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1881                         void *arg, uint32_t evt)
1882 {
1883         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1884         if (ndlp->nlp_DID == Fabric_DID) {
1885                 spin_lock_irq(shost->host_lock);
1886                 vport->fc_flag &= ~(FC_FABRIC | FC_PUBLIC_LOOP);
1887                 spin_unlock_irq(shost->host_lock);
1888         }
1889         lpfc_unreg_rpi(vport, ndlp);
1890         return ndlp->nlp_state;
1891 }
1892
1893 static uint32_t
1894 lpfc_cmpl_adisc_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1895                          void *arg, uint32_t evt)
1896 {
1897         struct lpfc_iocbq *cmdiocb, *rspiocb;
1898         IOCB_t *irsp;
1899
1900         cmdiocb = (struct lpfc_iocbq *) arg;
1901         rspiocb = cmdiocb->context_un.rsp_iocb;
1902
1903         irsp = &rspiocb->iocb;
1904         if (irsp->ulpStatus && (ndlp->nlp_flag & NLP_NODEV_REMOVE)) {
1905                 lpfc_drop_node(vport, ndlp);
1906                 return NLP_STE_FREED_NODE;
1907         }
1908         return ndlp->nlp_state;
1909 }
1910
1911 static uint32_t
1912 lpfc_cmpl_reglogin_npr_node(struct lpfc_vport *vport,
1913                             struct lpfc_nodelist *ndlp,
1914                             void *arg, uint32_t evt)
1915 {
1916         LPFC_MBOXQ_t *pmb = (LPFC_MBOXQ_t *) arg;
1917         MAILBOX_t    *mb = &pmb->u.mb;
1918
1919         if (!mb->mbxStatus) {
1920                 ndlp->nlp_rpi = mb->un.varWords[0];
1921                 ndlp->nlp_flag |= NLP_RPI_VALID;
1922         } else {
1923                 if (ndlp->nlp_flag & NLP_NODEV_REMOVE) {
1924                         lpfc_drop_node(vport, ndlp);
1925                         return NLP_STE_FREED_NODE;
1926                 }
1927         }
1928         return ndlp->nlp_state;
1929 }
1930
1931 static uint32_t
1932 lpfc_device_rm_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1933                         void *arg, uint32_t evt)
1934 {
1935         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1936
1937         if (ndlp->nlp_flag & NLP_NPR_2B_DISC) {
1938                 spin_lock_irq(shost->host_lock);
1939                 ndlp->nlp_flag |= NLP_NODEV_REMOVE;
1940                 spin_unlock_irq(shost->host_lock);
1941                 return ndlp->nlp_state;
1942         }
1943         lpfc_drop_node(vport, ndlp);
1944         return NLP_STE_FREED_NODE;
1945 }
1946
1947 static uint32_t
1948 lpfc_device_recov_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1949                            void *arg, uint32_t evt)
1950 {
1951         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1952
1953         /* Don't do anything that will mess up processing of the
1954          * previous RSCN.
1955          */
1956         if (vport->fc_flag & FC_RSCN_DEFERRED)
1957                 return ndlp->nlp_state;
1958
1959         lpfc_cancel_retry_delay_tmo(vport, ndlp);
1960         spin_lock_irq(shost->host_lock);
1961         ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
1962         spin_unlock_irq(shost->host_lock);
1963         return ndlp->nlp_state;
1964 }
1965
1966
1967 /* This next section defines the NPort Discovery State Machine */
1968
1969 /* There are 4 different double linked lists nodelist entries can reside on.
1970  * The plogi list and adisc list are used when Link Up discovery or RSCN
1971  * processing is needed. Each list holds the nodes that we will send PLOGI
1972  * or ADISC on. These lists will keep track of what nodes will be effected
1973  * by an RSCN, or a Link Up (Typically, all nodes are effected on Link Up).
1974  * The unmapped_list will contain all nodes that we have successfully logged
1975  * into at the Fibre Channel level. The mapped_list will contain all nodes
1976  * that are mapped FCP targets.
1977  */
1978 /*
1979  * The bind list is a list of undiscovered (potentially non-existent) nodes
1980  * that we have saved binding information on. This information is used when
1981  * nodes transition from the unmapped to the mapped list.
1982  */
1983 /* For UNUSED_NODE state, the node has just been allocated .
1984  * For PLOGI_ISSUE and REG_LOGIN_ISSUE, the node is on
1985  * the PLOGI list. For REG_LOGIN_COMPL, the node is taken off the PLOGI list
1986  * and put on the unmapped list. For ADISC processing, the node is taken off
1987  * the ADISC list and placed on either the mapped or unmapped list (depending
1988  * on its previous state). Once on the unmapped list, a PRLI is issued and the
1989  * state changed to PRLI_ISSUE. When the PRLI completion occurs, the state is
1990  * changed to UNMAPPED_NODE. If the completion indicates a mapped
1991  * node, the node is taken off the unmapped list. The binding list is checked
1992  * for a valid binding, or a binding is automatically assigned. If binding
1993  * assignment is unsuccessful, the node is left on the unmapped list. If
1994  * binding assignment is successful, the associated binding list entry (if
1995  * any) is removed, and the node is placed on the mapped list.
1996  */
1997 /*
1998  * For a Link Down, all nodes on the ADISC, PLOGI, unmapped or mapped
1999  * lists will receive a DEVICE_RECOVERY event. If the linkdown or devloss timers
2000  * expire, all effected nodes will receive a DEVICE_RM event.
2001  */
2002 /*
2003  * For a Link Up or RSCN, all nodes will move from the mapped / unmapped lists
2004  * to either the ADISC or PLOGI list.  After a Nameserver query or ALPA loopmap
2005  * check, additional nodes may be added or removed (via DEVICE_RM) to / from
2006  * the PLOGI or ADISC lists. Once the PLOGI and ADISC lists are populated,
2007  * we will first process the ADISC list.  32 entries are processed initially and
2008  * ADISC is initited for each one.  Completions / Events for each node are
2009  * funnelled thru the state machine.  As each node finishes ADISC processing, it
2010  * starts ADISC for any nodes waiting for ADISC processing. If no nodes are
2011  * waiting, and the ADISC list count is identically 0, then we are done. For
2012  * Link Up discovery, since all nodes on the PLOGI list are UNREG_LOGIN'ed, we
2013  * can issue a CLEAR_LA and reenable Link Events. Next we will process the PLOGI
2014  * list.  32 entries are processed initially and PLOGI is initited for each one.
2015  * Completions / Events for each node are funnelled thru the state machine.  As
2016  * each node finishes PLOGI processing, it starts PLOGI for any nodes waiting
2017  * for PLOGI processing. If no nodes are waiting, and the PLOGI list count is
2018  * indentically 0, then we are done. We have now completed discovery / RSCN
2019  * handling. Upon completion, ALL nodes should be on either the mapped or
2020  * unmapped lists.
2021  */
2022
2023 static uint32_t (*lpfc_disc_action[NLP_STE_MAX_STATE * NLP_EVT_MAX_EVENT])
2024      (struct lpfc_vport *, struct lpfc_nodelist *, void *, uint32_t) = {
2025         /* Action routine                  Event       Current State  */
2026         lpfc_rcv_plogi_unused_node,     /* RCV_PLOGI   UNUSED_NODE    */
2027         lpfc_rcv_els_unused_node,       /* RCV_PRLI        */
2028         lpfc_rcv_logo_unused_node,      /* RCV_LOGO        */
2029         lpfc_rcv_els_unused_node,       /* RCV_ADISC       */
2030         lpfc_rcv_els_unused_node,       /* RCV_PDISC       */
2031         lpfc_rcv_els_unused_node,       /* RCV_PRLO        */
2032         lpfc_disc_illegal,              /* CMPL_PLOGI      */
2033         lpfc_disc_illegal,              /* CMPL_PRLI       */
2034         lpfc_cmpl_logo_unused_node,     /* CMPL_LOGO       */
2035         lpfc_disc_illegal,              /* CMPL_ADISC      */
2036         lpfc_disc_illegal,              /* CMPL_REG_LOGIN  */
2037         lpfc_device_rm_unused_node,     /* DEVICE_RM       */
2038         lpfc_disc_illegal,              /* DEVICE_RECOVERY */
2039
2040         lpfc_rcv_plogi_plogi_issue,     /* RCV_PLOGI   PLOGI_ISSUE    */
2041         lpfc_rcv_prli_plogi_issue,      /* RCV_PRLI        */
2042         lpfc_rcv_logo_plogi_issue,      /* RCV_LOGO        */
2043         lpfc_rcv_els_plogi_issue,       /* RCV_ADISC       */
2044         lpfc_rcv_els_plogi_issue,       /* RCV_PDISC       */
2045         lpfc_rcv_els_plogi_issue,       /* RCV_PRLO        */
2046         lpfc_cmpl_plogi_plogi_issue,    /* CMPL_PLOGI      */
2047         lpfc_disc_illegal,              /* CMPL_PRLI       */
2048         lpfc_cmpl_logo_plogi_issue,     /* CMPL_LOGO       */
2049         lpfc_disc_illegal,              /* CMPL_ADISC      */
2050         lpfc_cmpl_reglogin_plogi_issue,/* CMPL_REG_LOGIN  */
2051         lpfc_device_rm_plogi_issue,     /* DEVICE_RM       */
2052         lpfc_device_recov_plogi_issue,  /* DEVICE_RECOVERY */
2053
2054         lpfc_rcv_plogi_adisc_issue,     /* RCV_PLOGI   ADISC_ISSUE    */
2055         lpfc_rcv_prli_adisc_issue,      /* RCV_PRLI        */
2056         lpfc_rcv_logo_adisc_issue,      /* RCV_LOGO        */
2057         lpfc_rcv_padisc_adisc_issue,    /* RCV_ADISC       */
2058         lpfc_rcv_padisc_adisc_issue,    /* RCV_PDISC       */
2059         lpfc_rcv_prlo_adisc_issue,      /* RCV_PRLO        */
2060         lpfc_disc_illegal,              /* CMPL_PLOGI      */
2061         lpfc_disc_illegal,              /* CMPL_PRLI       */
2062         lpfc_disc_illegal,              /* CMPL_LOGO       */
2063         lpfc_cmpl_adisc_adisc_issue,    /* CMPL_ADISC      */
2064         lpfc_disc_illegal,              /* CMPL_REG_LOGIN  */
2065         lpfc_device_rm_adisc_issue,     /* DEVICE_RM       */
2066         lpfc_device_recov_adisc_issue,  /* DEVICE_RECOVERY */
2067
2068         lpfc_rcv_plogi_reglogin_issue,  /* RCV_PLOGI  REG_LOGIN_ISSUE */
2069         lpfc_rcv_prli_reglogin_issue,   /* RCV_PLOGI       */
2070         lpfc_rcv_logo_reglogin_issue,   /* RCV_LOGO        */
2071         lpfc_rcv_padisc_reglogin_issue, /* RCV_ADISC       */
2072         lpfc_rcv_padisc_reglogin_issue, /* RCV_PDISC       */
2073         lpfc_rcv_prlo_reglogin_issue,   /* RCV_PRLO        */
2074         lpfc_cmpl_plogi_illegal,        /* CMPL_PLOGI      */
2075         lpfc_disc_illegal,              /* CMPL_PRLI       */
2076         lpfc_disc_illegal,              /* CMPL_LOGO       */
2077         lpfc_disc_illegal,              /* CMPL_ADISC      */
2078         lpfc_cmpl_reglogin_reglogin_issue,/* CMPL_REG_LOGIN  */
2079         lpfc_device_rm_reglogin_issue,  /* DEVICE_RM       */
2080         lpfc_device_recov_reglogin_issue,/* DEVICE_RECOVERY */
2081
2082         lpfc_rcv_plogi_prli_issue,      /* RCV_PLOGI   PRLI_ISSUE     */
2083         lpfc_rcv_prli_prli_issue,       /* RCV_PRLI        */
2084         lpfc_rcv_logo_prli_issue,       /* RCV_LOGO        */
2085         lpfc_rcv_padisc_prli_issue,     /* RCV_ADISC       */
2086         lpfc_rcv_padisc_prli_issue,     /* RCV_PDISC       */
2087         lpfc_rcv_prlo_prli_issue,       /* RCV_PRLO        */
2088         lpfc_cmpl_plogi_illegal,        /* CMPL_PLOGI      */
2089         lpfc_cmpl_prli_prli_issue,      /* CMPL_PRLI       */
2090         lpfc_disc_illegal,              /* CMPL_LOGO       */
2091         lpfc_disc_illegal,              /* CMPL_ADISC      */
2092         lpfc_disc_illegal,              /* CMPL_REG_LOGIN  */
2093         lpfc_device_rm_prli_issue,      /* DEVICE_RM       */
2094         lpfc_device_recov_prli_issue,   /* DEVICE_RECOVERY */
2095
2096         lpfc_rcv_plogi_unmap_node,      /* RCV_PLOGI   UNMAPPED_NODE  */
2097         lpfc_rcv_prli_unmap_node,       /* RCV_PRLI        */
2098         lpfc_rcv_logo_unmap_node,       /* RCV_LOGO        */
2099         lpfc_rcv_padisc_unmap_node,     /* RCV_ADISC       */
2100         lpfc_rcv_padisc_unmap_node,     /* RCV_PDISC       */
2101         lpfc_rcv_prlo_unmap_node,       /* RCV_PRLO        */
2102         lpfc_disc_illegal,              /* CMPL_PLOGI      */
2103         lpfc_disc_illegal,              /* CMPL_PRLI       */
2104         lpfc_disc_illegal,              /* CMPL_LOGO       */
2105         lpfc_disc_illegal,              /* CMPL_ADISC      */
2106         lpfc_disc_illegal,              /* CMPL_REG_LOGIN  */
2107         lpfc_disc_illegal,              /* DEVICE_RM       */
2108         lpfc_device_recov_unmap_node,   /* DEVICE_RECOVERY */
2109
2110         lpfc_rcv_plogi_mapped_node,     /* RCV_PLOGI   MAPPED_NODE    */
2111         lpfc_rcv_prli_mapped_node,      /* RCV_PRLI        */
2112         lpfc_rcv_logo_mapped_node,      /* RCV_LOGO        */
2113         lpfc_rcv_padisc_mapped_node,    /* RCV_ADISC       */
2114         lpfc_rcv_padisc_mapped_node,    /* RCV_PDISC       */
2115         lpfc_rcv_prlo_mapped_node,      /* RCV_PRLO        */
2116         lpfc_disc_illegal,              /* CMPL_PLOGI      */
2117         lpfc_disc_illegal,              /* CMPL_PRLI       */
2118         lpfc_disc_illegal,              /* CMPL_LOGO       */
2119         lpfc_disc_illegal,              /* CMPL_ADISC      */
2120         lpfc_disc_illegal,              /* CMPL_REG_LOGIN  */
2121         lpfc_disc_illegal,              /* DEVICE_RM       */
2122         lpfc_device_recov_mapped_node,  /* DEVICE_RECOVERY */
2123
2124         lpfc_rcv_plogi_npr_node,        /* RCV_PLOGI   NPR_NODE    */
2125         lpfc_rcv_prli_npr_node,         /* RCV_PRLI        */
2126         lpfc_rcv_logo_npr_node,         /* RCV_LOGO        */
2127         lpfc_rcv_padisc_npr_node,       /* RCV_ADISC       */
2128         lpfc_rcv_padisc_npr_node,       /* RCV_PDISC       */
2129         lpfc_rcv_prlo_npr_node,         /* RCV_PRLO        */
2130         lpfc_cmpl_plogi_npr_node,       /* CMPL_PLOGI      */
2131         lpfc_cmpl_prli_npr_node,        /* CMPL_PRLI       */
2132         lpfc_cmpl_logo_npr_node,        /* CMPL_LOGO       */
2133         lpfc_cmpl_adisc_npr_node,       /* CMPL_ADISC      */
2134         lpfc_cmpl_reglogin_npr_node,    /* CMPL_REG_LOGIN  */
2135         lpfc_device_rm_npr_node,        /* DEVICE_RM       */
2136         lpfc_device_recov_npr_node,     /* DEVICE_RECOVERY */
2137 };
2138
2139 int
2140 lpfc_disc_state_machine(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
2141                         void *arg, uint32_t evt)
2142 {
2143         uint32_t cur_state, rc;
2144         uint32_t(*func) (struct lpfc_vport *, struct lpfc_nodelist *, void *,
2145                          uint32_t);
2146         uint32_t got_ndlp = 0;
2147
2148         if (lpfc_nlp_get(ndlp))
2149                 got_ndlp = 1;
2150
2151         cur_state = ndlp->nlp_state;
2152
2153         /* DSM in event <evt> on NPort <nlp_DID> in state <cur_state> */
2154         lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
2155                          "0211 DSM in event x%x on NPort x%x in "
2156                          "state %d Data: x%x\n",
2157                          evt, ndlp->nlp_DID, cur_state, ndlp->nlp_flag);
2158
2159         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_DSM,
2160                  "DSM in:          evt:%d ste:%d did:x%x",
2161                 evt, cur_state, ndlp->nlp_DID);
2162
2163         func = lpfc_disc_action[(cur_state * NLP_EVT_MAX_EVENT) + evt];
2164         rc = (func) (vport, ndlp, arg, evt);
2165
2166         /* DSM out state <rc> on NPort <nlp_DID> */
2167         if (got_ndlp) {
2168                 lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
2169                          "0212 DSM out state %d on NPort x%x Data: x%x\n",
2170                          rc, ndlp->nlp_DID, ndlp->nlp_flag);
2171
2172                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_DSM,
2173                         "DSM out:         ste:%d did:x%x flg:x%x",
2174                         rc, ndlp->nlp_DID, ndlp->nlp_flag);
2175                 /* Decrement the ndlp reference count held for this function */
2176                 lpfc_nlp_put(ndlp);
2177         } else {
2178                 lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
2179                         "0213 DSM out state %d on NPort free\n", rc);
2180
2181                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_DSM,
2182                         "DSM out:         ste:%d did:x%x flg:x%x",
2183                         rc, 0, 0);
2184         }
2185
2186         return rc;
2187 }