drivers/scsi/lpfc/lpfc_nportdisc.c

   1  /*******************************************************************
   2  * This file is part of the Emulex Linux Device Driver for         *
   3  * Fibre Channel Host Bus Adapters.                                *
   4  * Copyright (C) 2004-2009 Emulex.  All rights reserved.           *
   5  * EMULEX and SLI are trademarks of Emulex.                        *
   6  * www.emulex.com                                                  *
   7  * Portions Copyright (C) 2004-2005 Christoph Hellwig              *
   8  *                                                                 *
   9  * This program is free software; you can redistribute it and/or   *
  10  * modify it under the terms of version 2 of the GNU General       *
  11  * Public License as published by the Free Software Foundation.    *
  12  * This program is distributed in the hope that it will be useful. *
  13  * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND          *
  14  * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,  *
  15  * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE      *
  16  * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
  17  * TO BE LEGALLY INVALID.  See the GNU General Public License for  *
  18  * more details, a copy of which can be found in the file COPYING  *
  19  * included with this package.                                     *
  20  *******************************************************************/
  21
  22 #include <linux/blkdev.h>
  23 #include <linux/pci.h>
  24 #include <linux/slab.h>
  25 #include <linux/interrupt.h>
  26
  27 #include <scsi/scsi.h>
  28 #include <scsi/scsi_device.h>
  29 #include <scsi/scsi_host.h>
  30 #include <scsi/scsi_transport_fc.h>
  31
  32 #include "lpfc_hw4.h"
  33 #include "lpfc_hw.h"
  34 #include "lpfc_sli.h"
  35 #include "lpfc_sli4.h"
  36 #include "lpfc_nl.h"
  37 #include "lpfc_disc.h"
  38 #include "lpfc_scsi.h"
  39 #include "lpfc.h"
  40 #include "lpfc_logmsg.h"
  41 #include "lpfc_crtn.h"
  42 #include "lpfc_vport.h"
  43 #include "lpfc_debugfs.h"
  44
  45
  46 /* Called to verify a rcv'ed ADISC was intended for us. */
  47 static int
  48 lpfc_check_adisc(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
  49                  struct lpfc_name *nn, struct lpfc_name *pn)
  50 {
  51         /* Compare the ADISC rsp WWNN / WWPN matches our internal node
  52          * table entry for that node.
  53          */
  54         if (memcmp(nn, &ndlp->nlp_nodename, sizeof (struct lpfc_name)))
  55                 return 0;
  56
  57         if (memcmp(pn, &ndlp->nlp_portname, sizeof (struct lpfc_name)))
  58                 return 0;
  59
  60         /* we match, return success */
  61         return 1;
  62 }
  63
  64 int
  65 lpfc_check_sparm(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
  66                  struct serv_parm *sp, uint32_t class, int flogi)
  67 {
  68         volatile struct serv_parm *hsp = &vport->fc_sparam;
  69         uint16_t hsp_value, ssp_value = 0;
  70
  71         /*
  72          * The receive data field size and buffer-to-buffer receive data field
  73          * size entries are 16 bits but are represented as two 8-bit fields in
  74          * the driver data structure to account for rsvd bits and other control
  75          * bits.  Reconstruct and compare the fields as a 16-bit values before
  76          * correcting the byte values.
  77          */
  78         if (sp->cls1.classValid) {
  79                 if (!flogi) {
  80                         hsp_value = ((hsp->cls1.rcvDataSizeMsb << 8) |
  81                                      hsp->cls1.rcvDataSizeLsb);
  82                         ssp_value = ((sp->cls1.rcvDataSizeMsb << 8) |
  83                                      sp->cls1.rcvDataSizeLsb);
  84                         if (!ssp_value)
  85                                 goto bad_service_param;
  86                         if (ssp_value > hsp_value) {
  87                                 sp->cls1.rcvDataSizeLsb =
  88                                         hsp->cls1.rcvDataSizeLsb;
  89                                 sp->cls1.rcvDataSizeMsb =
  90                                         hsp->cls1.rcvDataSizeMsb;
  91                         }
  92                 }
  93         } else if (class == CLASS1)
  94                 goto bad_service_param;
  95         if (sp->cls2.classValid) {
  96                 if (!flogi) {
  97                         hsp_value = ((hsp->cls2.rcvDataSizeMsb << 8) |
  98                                      hsp->cls2.rcvDataSizeLsb);
  99                         ssp_value = ((sp->cls2.rcvDataSizeMsb << 8) |
 100                                      sp->cls2.rcvDataSizeLsb);
 101                         if (!ssp_value)
 102                                 goto bad_service_param;
 103                         if (ssp_value > hsp_value) {
 104                                 sp->cls2.rcvDataSizeLsb =
 105                                         hsp->cls2.rcvDataSizeLsb;
 106                                 sp->cls2.rcvDataSizeMsb =
 107                                         hsp->cls2.rcvDataSizeMsb;
 108                         }
 109                 }
 110         } else if (class == CLASS2)
 111                 goto bad_service_param;
 112         if (sp->cls3.classValid) {
 113                 if (!flogi) {
 114                         hsp_value = ((hsp->cls3.rcvDataSizeMsb << 8) |
 115                                      hsp->cls3.rcvDataSizeLsb);
 116                         ssp_value = ((sp->cls3.rcvDataSizeMsb << 8) |
 117                                      sp->cls3.rcvDataSizeLsb);
 118                         if (!ssp_value)
 119                                 goto bad_service_param;
 120                         if (ssp_value > hsp_value) {
 121                                 sp->cls3.rcvDataSizeLsb =
 122                                         hsp->cls3.rcvDataSizeLsb;
 123                                 sp->cls3.rcvDataSizeMsb =
 124                                         hsp->cls3.rcvDataSizeMsb;
 125                         }
 126                 }
 127         } else if (class == CLASS3)
 128                 goto bad_service_param;
 129
 130         /*
 131          * Preserve the upper four bits of the MSB from the PLOGI response.
 132          * These bits contain the Buffer-to-Buffer State Change Number
 133          * from the target and need to be passed to the FW.
 134          */
 135         hsp_value = (hsp->cmn.bbRcvSizeMsb << 8) | hsp->cmn.bbRcvSizeLsb;
 136         ssp_value = (sp->cmn.bbRcvSizeMsb << 8) | sp->cmn.bbRcvSizeLsb;
 137         if (ssp_value > hsp_value) {
 138                 sp->cmn.bbRcvSizeLsb = hsp->cmn.bbRcvSizeLsb;
 139                 sp->cmn.bbRcvSizeMsb = (sp->cmn.bbRcvSizeMsb & 0xF0) |
 140                                        (hsp->cmn.bbRcvSizeMsb & 0x0F);
 141         }
 142
 143         memcpy(&ndlp->nlp_nodename, &sp->nodeName, sizeof (struct lpfc_name));
 144         memcpy(&ndlp->nlp_portname, &sp->portName, sizeof (struct lpfc_name));
 145         return 1;
 146 bad_service_param:
 147         lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
 148                          "0207 Device %x "
 149                          "(%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x) sent "
 150                          "invalid service parameters.  Ignoring device.\n",
 151                          ndlp->nlp_DID,
 152                          sp->nodeName.u.wwn[0], sp->nodeName.u.wwn[1],
 153                          sp->nodeName.u.wwn[2], sp->nodeName.u.wwn[3],
 154                          sp->nodeName.u.wwn[4], sp->nodeName.u.wwn[5],
 155                          sp->nodeName.u.wwn[6], sp->nodeName.u.wwn[7]);
 156         return 0;
 157 }
 158
 159 static void *
 160 lpfc_check_elscmpl_iocb(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
 161                         struct lpfc_iocbq *rspiocb)
 162 {
 163         struct lpfc_dmabuf *pcmd, *prsp;
 164         uint32_t *lp;
 165         void     *ptr = NULL;
 166         IOCB_t   *irsp;
 167
 168         irsp = &rspiocb->iocb;
 169         pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
 170
 171         /* For lpfc_els_abort, context2 could be zero'ed to delay
 172          * freeing associated memory till after ABTS completes.
 173          */
 174         if (pcmd) {
 175                 prsp =  list_get_first(&pcmd->list, struct lpfc_dmabuf,
 176                                        list);
 177                 if (prsp) {
 178                         lp = (uint32_t *) prsp->virt;
 179                         ptr = (void *)((uint8_t *)lp + sizeof(uint32_t));
 180                 }
 181         } else {
 182                 /* Force ulpStatus error since we are returning NULL ptr */
 183                 if (!(irsp->ulpStatus)) {
 184                         irsp->ulpStatus = IOSTAT_LOCAL_REJECT;
 185                         irsp->un.ulpWord[4] = IOERR_SLI_ABORTED;
 186                 }
 187                 ptr = NULL;
 188         }
 189         return ptr;
 190 }
 191
 192
 193 /*
 194  * Free resources / clean up outstanding I/Os
 195  * associated with a LPFC_NODELIST entry. This
 196  * routine effectively results in a "software abort".
 197  */
 198 int
 199 lpfc_els_abort(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
 200 {
 201         LIST_HEAD(completions);
 202         struct lpfc_sli  *psli = &phba->sli;
 203         struct lpfc_sli_ring *pring = &psli->ring[LPFC_ELS_RING];
 204         struct lpfc_iocbq *iocb, *next_iocb;
 205
 206         /* Abort outstanding I/O on NPort <nlp_DID> */
 207         lpfc_printf_vlog(ndlp->vport, KERN_INFO, LOG_DISCOVERY,
 208                          "0205 Abort outstanding I/O on NPort x%x "
 209                          "Data: x%x x%x x%x\n",
 210                          ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
 211                          ndlp->nlp_rpi);
 212
 213         lpfc_fabric_abort_nport(ndlp);
 214
 215         /* First check the txq */
 216         spin_lock_irq(&phba->hbalock);
 217         list_for_each_entry_safe(iocb, next_iocb, &pring->txq, list) {
 218                 /* Check to see if iocb matches the nport we are looking for */
 219                 if (lpfc_check_sli_ndlp(phba, pring, iocb, ndlp)) {
 220                         /* It matches, so deque and call compl with anp error */
 221                         list_move_tail(&iocb->list, &completions);
 222                         pring->txq_cnt--;
 223                 }
 224         }
 225
 226         /* Next check the txcmplq */
 227         list_for_each_entry_safe(iocb, next_iocb, &pring->txcmplq, list) {
 228                 /* Check to see if iocb matches the nport we are looking for */
 229                 if (lpfc_check_sli_ndlp(phba, pring, iocb, ndlp)) {
 230                         lpfc_sli_issue_abort_iotag(phba, pring, iocb);
 231                 }
 232         }
 233         spin_unlock_irq(&phba->hbalock);
 234
 235         /* Cancel all the IOCBs from the completions list */
 236         lpfc_sli_cancel_iocbs(phba, &completions, IOSTAT_LOCAL_REJECT,
 237                               IOERR_SLI_ABORTED);
 238
 239         lpfc_cancel_retry_delay_tmo(phba->pport, ndlp);
 240         return 0;
 241 }
 242
 243 static int
 244 lpfc_rcv_plogi(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 245                struct lpfc_iocbq *cmdiocb)
 246 {
 247         struct Scsi_Host   *shost = lpfc_shost_from_vport(vport);
 248         struct lpfc_hba    *phba = vport->phba;
 249         struct lpfc_dmabuf *pcmd;
 250         uint32_t *lp;
 251         IOCB_t *icmd;
 252         struct serv_parm *sp;
 253         LPFC_MBOXQ_t *mbox;
 254         struct ls_rjt stat;
 255         int rc;
 256
 257         memset(&stat, 0, sizeof (struct ls_rjt));
 258         if (vport->port_state <= LPFC_FDISC) {
 259                 /* Before responding to PLOGI, check for pt2pt mode.
 260                  * If we are pt2pt, with an outstanding FLOGI, abort
 261                  * the FLOGI and resend it first.
 262                  */
 263                 if (vport->fc_flag & FC_PT2PT) {
 264                          lpfc_els_abort_flogi(phba);
 265                         if (!(vport->fc_flag & FC_PT2PT_PLOGI)) {
 266                                 /* If the other side is supposed to initiate
 267                                  * the PLOGI anyway, just ACC it now and
 268                                  * move on with discovery.
 269                                  */
 270                                 phba->fc_edtov = FF_DEF_EDTOV;
 271                                 phba->fc_ratov = FF_DEF_RATOV;
 272                                 /* Start discovery - this should just do
 273                                    CLEAR_LA */
 274                                 lpfc_disc_start(vport);
 275                         } else
 276                                 lpfc_initial_flogi(vport);
 277                 } else {
 278                         stat.un.b.lsRjtRsnCode = LSRJT_LOGICAL_BSY;
 279                         stat.un.b.lsRjtRsnCodeExp = LSEXP_NOTHING_MORE;
 280                         lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb,
 281                                             ndlp, NULL);
 282                         return 0;
 283                 }
 284         }
 285         pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
 286         lp = (uint32_t *) pcmd->virt;
 287         sp = (struct serv_parm *) ((uint8_t *) lp + sizeof (uint32_t));
 288         if (wwn_to_u64(sp->portName.u.wwn) == 0) {
 289                 lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
 290                                  "0140 PLOGI Reject: invalid nname\n");
 291                 stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
 292                 stat.un.b.lsRjtRsnCodeExp = LSEXP_INVALID_PNAME;
 293                 lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp,
 294                         NULL);
 295                 return 0;
 296         }
 297         if (wwn_to_u64(sp->nodeName.u.wwn) == 0) {
 298                 lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
 299                                  "0141 PLOGI Reject: invalid pname\n");
 300                 stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
 301                 stat.un.b.lsRjtRsnCodeExp = LSEXP_INVALID_NNAME;
 302                 lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp,
 303                         NULL);
 304                 return 0;
 305         }
 306         if ((lpfc_check_sparm(vport, ndlp, sp, CLASS3, 0) == 0)) {
 307                 /* Reject this request because invalid parameters */
 308                 stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
 309                 stat.un.b.lsRjtRsnCodeExp = LSEXP_SPARM_OPTIONS;
 310                 lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp,
 311                         NULL);
 312                 return 0;
 313         }
 314         icmd = &cmdiocb->iocb;
 315
 316         /* PLOGI chkparm OK */
 317         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
 318                          "0114 PLOGI chkparm OK Data: x%x x%x x%x x%x\n",
 319                          ndlp->nlp_DID, ndlp->nlp_state, ndlp->nlp_flag,
 320                          ndlp->nlp_rpi);
 321
 322         if (vport->cfg_fcp_class == 2 && sp->cls2.classValid)
 323                 ndlp->nlp_fcp_info |= CLASS2;
 324         else
 325                 ndlp->nlp_fcp_info |= CLASS3;
 326
 327         ndlp->nlp_class_sup = 0;
 328         if (sp->cls1.classValid)
 329                 ndlp->nlp_class_sup |= FC_COS_CLASS1;
 330         if (sp->cls2.classValid)
 331                 ndlp->nlp_class_sup |= FC_COS_CLASS2;
 332         if (sp->cls3.classValid)
 333                 ndlp->nlp_class_sup |= FC_COS_CLASS3;
 334         if (sp->cls4.classValid)
 335                 ndlp->nlp_class_sup |= FC_COS_CLASS4;
 336         ndlp->nlp_maxframe =
 337                 ((sp->cmn.bbRcvSizeMsb & 0x0F) << 8) | sp->cmn.bbRcvSizeLsb;
 338
 339         /* no need to reg_login if we are already in one of these states */
 340         switch (ndlp->nlp_state) {
 341         case  NLP_STE_NPR_NODE:
 342                 if (!(ndlp->nlp_flag & NLP_NPR_ADISC))
 343                         break;
 344         case  NLP_STE_REG_LOGIN_ISSUE:
 345         case  NLP_STE_PRLI_ISSUE:
 346         case  NLP_STE_UNMAPPED_NODE:
 347         case  NLP_STE_MAPPED_NODE:
 348                 lpfc_els_rsp_acc(vport, ELS_CMD_PLOGI, cmdiocb, ndlp, NULL);
 349                 return 1;
 350         }
 351
 352         if ((vport->fc_flag & FC_PT2PT) &&
 353             !(vport->fc_flag & FC_PT2PT_PLOGI)) {
 354                 /* rcv'ed PLOGI decides what our NPortId will be */
 355                 vport->fc_myDID = icmd->un.rcvels.parmRo;
 356                 mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
 357                 if (mbox == NULL)
 358                         goto out;
 359                 lpfc_config_link(phba, mbox);
 360                 mbox->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
 361                 mbox->vport = vport;
 362                 rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
 363                 if (rc == MBX_NOT_FINISHED) {
 364                         mempool_free(mbox, phba->mbox_mem_pool);
 365                         goto out;
 366                 }
 367
 368                 lpfc_can_disctmo(vport);
 369         }
 370         mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
 371         if (!mbox)
 372                 goto out;
 373
 374         rc = lpfc_reg_rpi(phba, vport->vpi, icmd->un.rcvels.remoteID,
 375                             (uint8_t *) sp, mbox, 0);
 376         if (rc) {
 377                 mempool_free(mbox, phba->mbox_mem_pool);
 378                 goto out;
 379         }
 380
 381         /* ACC PLOGI rsp command needs to execute first,
 382          * queue this mbox command to be processed later.
 383          */
 384         mbox->mbox_cmpl = lpfc_mbx_cmpl_reg_login;
 385         /*
 386          * mbox->context2 = lpfc_nlp_get(ndlp) deferred until mailbox
 387          * command issued in lpfc_cmpl_els_acc().
 388          */
 389         mbox->vport = vport;
 390         spin_lock_irq(shost->host_lock);
 391         ndlp->nlp_flag |= (NLP_ACC_REGLOGIN | NLP_RCV_PLOGI);
 392         spin_unlock_irq(shost->host_lock);
 393
 394         /*
 395          * If there is an outstanding PLOGI issued, abort it before
 396          * sending ACC rsp for received PLOGI. If pending plogi
 397          * is not canceled here, the plogi will be rejected by
 398          * remote port and will be retried. On a configuration with
 399          * single discovery thread, this will cause a huge delay in
 400          * discovery. Also this will cause multiple state machines
 401          * running in parallel for this node.
 402          */
 403         if (ndlp->nlp_state == NLP_STE_PLOGI_ISSUE) {
 404                 /* software abort outstanding PLOGI */
 405                 lpfc_els_abort(phba, ndlp);
 406         }
 407
 408         if ((vport->port_type == LPFC_NPIV_PORT &&
 409              vport->cfg_restrict_login)) {
 410
 411                 /* In order to preserve RPIs, we want to cleanup
 412                  * the default RPI the firmware created to rcv
 413                  * this ELS request. The only way to do this is
 414                  * to register, then unregister the RPI.
 415                  */
 416                 spin_lock_irq(shost->host_lock);
 417                 ndlp->nlp_flag |= NLP_RM_DFLT_RPI;
 418                 spin_unlock_irq(shost->host_lock);
 419                 stat.un.b.lsRjtRsnCode = LSRJT_INVALID_CMD;
 420                 stat.un.b.lsRjtRsnCodeExp = LSEXP_NOTHING_MORE;
 421                 lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb,
 422                         ndlp, mbox);
 423                 return 1;
 424         }
 425         lpfc_els_rsp_acc(vport, ELS_CMD_PLOGI, cmdiocb, ndlp, mbox);
 426         return 1;
 427 out:
 428         stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
 429         stat.un.b.lsRjtRsnCodeExp = LSEXP_OUT_OF_RESOURCE;
 430         lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
 431         return 0;
 432 }
 433
 434 static int
 435 lpfc_rcv_padisc(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 436                 struct lpfc_iocbq *cmdiocb)
 437 {
 438         struct Scsi_Host   *shost = lpfc_shost_from_vport(vport);
 439         struct lpfc_dmabuf *pcmd;
 440         struct serv_parm   *sp;
 441         struct lpfc_name   *pnn, *ppn;
 442         struct ls_rjt stat;
 443         ADISC *ap;
 444         IOCB_t *icmd;
 445         uint32_t *lp;
 446         uint32_t cmd;
 447
 448         pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
 449         lp = (uint32_t *) pcmd->virt;
 450
 451         cmd = *lp++;
 452         if (cmd == ELS_CMD_ADISC) {
 453                 ap = (ADISC *) lp;
 454                 pnn = (struct lpfc_name *) & ap->nodeName;
 455                 ppn = (struct lpfc_name *) & ap->portName;
 456         } else {
 457                 sp = (struct serv_parm *) lp;
 458                 pnn = (struct lpfc_name *) & sp->nodeName;
 459                 ppn = (struct lpfc_name *) & sp->portName;
 460         }
 461
 462         icmd = &cmdiocb->iocb;
 463         if (icmd->ulpStatus == 0 && lpfc_check_adisc(vport, ndlp, pnn, ppn)) {
 464                 if (cmd == ELS_CMD_ADISC) {
 465                         lpfc_els_rsp_adisc_acc(vport, cmdiocb, ndlp);
 466                 } else {
 467                         lpfc_els_rsp_acc(vport, ELS_CMD_PLOGI, cmdiocb, ndlp,
 468                                          NULL);
 469                 }
 470                 return 1;
 471         }
 472         /* Reject this request because invalid parameters */
 473         stat.un.b.lsRjtRsvd0 = 0;
 474         stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
 475         stat.un.b.lsRjtRsnCodeExp = LSEXP_SPARM_OPTIONS;
 476         stat.un.b.vendorUnique = 0;
 477         lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
 478
 479         /* 1 sec timeout */
 480         mod_timer(&ndlp->nlp_delayfunc, jiffies + HZ);
 481
 482         spin_lock_irq(shost->host_lock);
 483         ndlp->nlp_flag |= NLP_DELAY_TMO;
 484         spin_unlock_irq(shost->host_lock);
 485         ndlp->nlp_last_elscmd = ELS_CMD_PLOGI;
 486         ndlp->nlp_prev_state = ndlp->nlp_state;
 487         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
 488         return 0;
 489 }
 490
 491 static int
 492 lpfc_rcv_logo(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 493               struct lpfc_iocbq *cmdiocb, uint32_t els_cmd)
 494 {
 495         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
 496
 497         /* Put ndlp in NPR state with 1 sec timeout for plogi, ACC logo */
 498         /* Only call LOGO ACC for first LOGO, this avoids sending unnecessary
 499          * PLOGIs during LOGO storms from a device.
 500          */
 501         spin_lock_irq(shost->host_lock);
 502         ndlp->nlp_flag |= NLP_LOGO_ACC;
 503         spin_unlock_irq(shost->host_lock);
 504         if (els_cmd == ELS_CMD_PRLO)
 505                 lpfc_els_rsp_acc(vport, ELS_CMD_PRLO, cmdiocb, ndlp, NULL);
 506         else
 507                 lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
 508         if ((ndlp->nlp_DID == Fabric_DID) &&
 509                 vport->port_type == LPFC_NPIV_PORT) {
 510                 lpfc_linkdown_port(vport);
 511                 mod_timer(&ndlp->nlp_delayfunc, jiffies + HZ * 1);
 512                 spin_lock_irq(shost->host_lock);
 513                 ndlp->nlp_flag |= NLP_DELAY_TMO;
 514                 spin_unlock_irq(shost->host_lock);
 515
 516                 ndlp->nlp_last_elscmd = ELS_CMD_FDISC;
 517         } else if ((!(ndlp->nlp_type & NLP_FABRIC) &&
 518                 ((ndlp->nlp_type & NLP_FCP_TARGET) ||
 519                 !(ndlp->nlp_type & NLP_FCP_INITIATOR))) ||
 520                 (ndlp->nlp_state == NLP_STE_ADISC_ISSUE)) {
 521                 /* Only try to re-login if this is NOT a Fabric Node */
 522                 mod_timer(&ndlp->nlp_delayfunc, jiffies + HZ * 1);
 523                 spin_lock_irq(shost->host_lock);
 524                 ndlp->nlp_flag |= NLP_DELAY_TMO;
 525                 spin_unlock_irq(shost->host_lock);
 526
 527                 ndlp->nlp_last_elscmd = ELS_CMD_PLOGI;
 528         }
 529         ndlp->nlp_prev_state = ndlp->nlp_state;
 530         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
 531
 532         spin_lock_irq(shost->host_lock);
 533         ndlp->nlp_flag &= ~NLP_NPR_ADISC;
 534         spin_unlock_irq(shost->host_lock);
 535         /* The driver has to wait until the ACC completes before it continues
 536          * processing the LOGO.  The action will resume in
 537          * lpfc_cmpl_els_logo_acc routine. Since part of processing includes an
 538          * unreg_login, the driver waits so the ACC does not get aborted.
 539          */
 540         return 0;
 541 }
 542
 543 static void
 544 lpfc_rcv_prli(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 545               struct lpfc_iocbq *cmdiocb)
 546 {
 547         struct lpfc_dmabuf *pcmd;
 548         uint32_t *lp;
 549         PRLI *npr;
 550         struct fc_rport *rport = ndlp->rport;
 551         u32 roles;
 552
 553         pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
 554         lp = (uint32_t *) pcmd->virt;
 555         npr = (PRLI *) ((uint8_t *) lp + sizeof (uint32_t));
 556
 557         ndlp->nlp_type &= ~(NLP_FCP_TARGET | NLP_FCP_INITIATOR);
 558         ndlp->nlp_fcp_info &= ~NLP_FCP_2_DEVICE;
 559         if (npr->prliType == PRLI_FCP_TYPE) {
 560                 if (npr->initiatorFunc)
 561                         ndlp->nlp_type |= NLP_FCP_INITIATOR;
 562                 if (npr->targetFunc)
 563                         ndlp->nlp_type |= NLP_FCP_TARGET;
 564                 if (npr->Retry)
 565                         ndlp->nlp_fcp_info |= NLP_FCP_2_DEVICE;
 566         }
 567         if (rport) {
 568                 /* We need to update the rport role values */
 569                 roles = FC_RPORT_ROLE_UNKNOWN;
 570                 if (ndlp->nlp_type & NLP_FCP_INITIATOR)
 571                         roles |= FC_RPORT_ROLE_FCP_INITIATOR;
 572                 if (ndlp->nlp_type & NLP_FCP_TARGET)
 573                         roles |= FC_RPORT_ROLE_FCP_TARGET;
 574
 575                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_RPORT,
 576                         "rport rolechg:   role:x%x did:x%x flg:x%x",
 577                         roles, ndlp->nlp_DID, ndlp->nlp_flag);
 578
 579                 fc_remote_port_rolechg(rport, roles);
 580         }
 581 }
 582
 583 static uint32_t
 584 lpfc_disc_set_adisc(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
 585 {
 586         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
 587
 588         if (!(ndlp->nlp_flag & NLP_RPI_VALID)) {
 589                 ndlp->nlp_flag &= ~NLP_NPR_ADISC;
 590                 return 0;
 591         }
 592
 593         if (!(vport->fc_flag & FC_PT2PT)) {
 594                 /* Check config parameter use-adisc or FCP-2 */
 595                 if ((vport->cfg_use_adisc && (vport->fc_flag & FC_RSCN_MODE)) ||
 596                     ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) {
 597                         spin_lock_irq(shost->host_lock);
 598                         ndlp->nlp_flag |= NLP_NPR_ADISC;
 599                         spin_unlock_irq(shost->host_lock);
 600                         return 1;
 601                 }
 602         }
 603         ndlp->nlp_flag &= ~NLP_NPR_ADISC;
 604         lpfc_unreg_rpi(vport, ndlp);
 605         return 0;
 606 }
 607
 608 static uint32_t
 609 lpfc_disc_illegal(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 610                   void *arg, uint32_t evt)
 611 {
 612         lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
 613                          "0271 Illegal State Transition: node x%x "
 614                          "event x%x, state x%x Data: x%x x%x\n",
 615                          ndlp->nlp_DID, evt, ndlp->nlp_state, ndlp->nlp_rpi,
 616                          ndlp->nlp_flag);
 617         return ndlp->nlp_state;
 618 }
 619
 620 static uint32_t
 621 lpfc_cmpl_plogi_illegal(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 622                   void *arg, uint32_t evt)
 623 {
 624         /* This transition is only legal if we previously
 625          * rcv'ed a PLOGI. Since we don't want 2 discovery threads
 626          * working on the same NPortID, do nothing for this thread
 627          * to stop it.
 628          */
 629         if (!(ndlp->nlp_flag & NLP_RCV_PLOGI)) {
 630                 lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
 631                          "0272 Illegal State Transition: node x%x "
 632                          "event x%x, state x%x Data: x%x x%x\n",
 633                          ndlp->nlp_DID, evt, ndlp->nlp_state, ndlp->nlp_rpi,
 634                          ndlp->nlp_flag);
 635         }
 636         return ndlp->nlp_state;
 637 }
 638
 639 /* Start of Discovery State Machine routines */
 640
 641 static uint32_t
 642 lpfc_rcv_plogi_unused_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 643                            void *arg, uint32_t evt)
 644 {
 645         struct lpfc_iocbq *cmdiocb;
 646
 647         cmdiocb = (struct lpfc_iocbq *) arg;
 648
 649         if (lpfc_rcv_plogi(vport, ndlp, cmdiocb)) {
 650                 return ndlp->nlp_state;
 651         }
 652         return NLP_STE_FREED_NODE;
 653 }
 654
 655 static uint32_t
 656 lpfc_rcv_els_unused_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 657                          void *arg, uint32_t evt)
 658 {
 659         lpfc_issue_els_logo(vport, ndlp, 0);
 660         return ndlp->nlp_state;
 661 }
 662
 663 static uint32_t
 664 lpfc_rcv_logo_unused_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 665                           void *arg, uint32_t evt)
 666 {
 667         struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
 668         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
 669
 670         spin_lock_irq(shost->host_lock);
 671         ndlp->nlp_flag |= NLP_LOGO_ACC;
 672         spin_unlock_irq(shost->host_lock);
 673         lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
 674
 675         return ndlp->nlp_state;
 676 }
 677
 678 static uint32_t
 679 lpfc_cmpl_logo_unused_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 680                            void *arg, uint32_t evt)
 681 {
 682         return NLP_STE_FREED_NODE;
 683 }
 684
 685 static uint32_t
 686 lpfc_device_rm_unused_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 687                            void *arg, uint32_t evt)
 688 {
 689         return NLP_STE_FREED_NODE;
 690 }
 691
 692 static uint32_t
 693 lpfc_rcv_plogi_plogi_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 694                            void *arg, uint32_t evt)
 695 {
 696         struct Scsi_Host   *shost = lpfc_shost_from_vport(vport);
 697         struct lpfc_hba   *phba = vport->phba;
 698         struct lpfc_iocbq *cmdiocb = arg;
 699         struct lpfc_dmabuf *pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
 700         uint32_t *lp = (uint32_t *) pcmd->virt;
 701         struct serv_parm *sp = (struct serv_parm *) (lp + 1);
 702         struct ls_rjt stat;
 703         int port_cmp;
 704
 705         memset(&stat, 0, sizeof (struct ls_rjt));
 706
 707         /* For a PLOGI, we only accept if our portname is less
 708          * than the remote portname.
 709          */
 710         phba->fc_stat.elsLogiCol++;
 711         port_cmp = memcmp(&vport->fc_portname, &sp->portName,
 712                           sizeof(struct lpfc_name));
 713
 714         if (port_cmp >= 0) {
 715                 /* Reject this request because the remote node will accept
 716                    ours */
 717                 stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
 718                 stat.un.b.lsRjtRsnCodeExp = LSEXP_CMD_IN_PROGRESS;
 719                 lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp,
 720                         NULL);
 721         } else {
 722                 if (lpfc_rcv_plogi(vport, ndlp, cmdiocb) &&
 723                     (ndlp->nlp_flag & NLP_NPR_2B_DISC) &&
 724                     (vport->num_disc_nodes)) {
 725                         spin_lock_irq(shost->host_lock);
 726                         ndlp->nlp_flag &= ~NLP_NPR_2B_DISC;
 727                         spin_unlock_irq(shost->host_lock);
 728                         /* Check if there are more PLOGIs to be sent */
 729                         lpfc_more_plogi(vport);
 730                         if (vport->num_disc_nodes == 0) {
 731                                 spin_lock_irq(shost->host_lock);
 732                                 vport->fc_flag &= ~FC_NDISC_ACTIVE;
 733                                 spin_unlock_irq(shost->host_lock);
 734                                 lpfc_can_disctmo(vport);
 735                                 lpfc_end_rscn(vport);
 736                         }
 737                 }
 738         } /* If our portname was less */
 739
 740         return ndlp->nlp_state;
 741 }
 742
 743 static uint32_t
 744 lpfc_rcv_prli_plogi_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 745                           void *arg, uint32_t evt)
 746 {
 747         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
 748         struct ls_rjt     stat;
 749
 750         memset(&stat, 0, sizeof (struct ls_rjt));
 751         stat.un.b.lsRjtRsnCode = LSRJT_LOGICAL_BSY;
 752         stat.un.b.lsRjtRsnCodeExp = LSEXP_NOTHING_MORE;
 753         lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
 754         return ndlp->nlp_state;
 755 }
 756
 757 static uint32_t
 758 lpfc_rcv_logo_plogi_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 759                           void *arg, uint32_t evt)
 760 {
 761         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
 762
 763                                 /* software abort outstanding PLOGI */
 764         lpfc_els_abort(vport->phba, ndlp);
 765
 766         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_LOGO);
 767         return ndlp->nlp_state;
 768 }
 769
 770 static uint32_t
 771 lpfc_rcv_els_plogi_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 772                          void *arg, uint32_t evt)
 773 {
 774         struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
 775         struct lpfc_hba   *phba = vport->phba;
 776         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
 777
 778         /* software abort outstanding PLOGI */
 779         lpfc_els_abort(phba, ndlp);
 780
 781         if (evt == NLP_EVT_RCV_LOGO) {
 782                 lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
 783         } else {
 784                 lpfc_issue_els_logo(vport, ndlp, 0);
 785         }
 786
 787         /* Put ndlp in npr state set plogi timer for 1 sec */
 788         mod_timer(&ndlp->nlp_delayfunc, jiffies + HZ * 1);
 789         spin_lock_irq(shost->host_lock);
 790         ndlp->nlp_flag |= NLP_DELAY_TMO;
 791         spin_unlock_irq(shost->host_lock);
 792         ndlp->nlp_last_elscmd = ELS_CMD_PLOGI;
 793         ndlp->nlp_prev_state = NLP_STE_PLOGI_ISSUE;
 794         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
 795
 796         return ndlp->nlp_state;
 797 }
 798
 799 static uint32_t
 800 lpfc_cmpl_plogi_plogi_issue(struct lpfc_vport *vport,
 801                             struct lpfc_nodelist *ndlp,
 802                             void *arg,
 803                             uint32_t evt)
 804 {
 805         struct lpfc_hba    *phba = vport->phba;
 806         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
 807         struct lpfc_iocbq  *cmdiocb, *rspiocb;
 808         struct lpfc_dmabuf *pcmd, *prsp, *mp;
 809         uint32_t *lp;
 810         IOCB_t *irsp;
 811         struct serv_parm *sp;
 812         LPFC_MBOXQ_t *mbox;
 813
 814         cmdiocb = (struct lpfc_iocbq *) arg;
 815         rspiocb = cmdiocb->context_un.rsp_iocb;
 816
 817         if (ndlp->nlp_flag & NLP_ACC_REGLOGIN) {
 818                 /* Recovery from PLOGI collision logic */
 819                 return ndlp->nlp_state;
 820         }
 821
 822         irsp = &rspiocb->iocb;
 823
 824         if (irsp->ulpStatus)
 825                 goto out;
 826
 827         pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
 828
 829         prsp = list_get_first(&pcmd->list, struct lpfc_dmabuf, list);
 830
 831         lp = (uint32_t *) prsp->virt;
 832         sp = (struct serv_parm *) ((uint8_t *) lp + sizeof (uint32_t));
 833
 834         /* Some switches have FDMI servers returning 0 for WWN */
 835         if ((ndlp->nlp_DID != FDMI_DID) &&
 836                 (wwn_to_u64(sp->portName.u.wwn) == 0 ||
 837                 wwn_to_u64(sp->nodeName.u.wwn) == 0)) {
 838                 lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
 839                                  "0142 PLOGI RSP: Invalid WWN.\n");
 840                 goto out;
 841         }
 842         if (!lpfc_check_sparm(vport, ndlp, sp, CLASS3, 0))
 843                 goto out;
 844         /* PLOGI chkparm OK */
 845         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
 846                          "0121 PLOGI chkparm OK Data: x%x x%x x%x x%x\n",
 847                          ndlp->nlp_DID, ndlp->nlp_state,
 848                          ndlp->nlp_flag, ndlp->nlp_rpi);
 849         if (vport->cfg_fcp_class == 2 && (sp->cls2.classValid))
 850                 ndlp->nlp_fcp_info |= CLASS2;
 851         else
 852                 ndlp->nlp_fcp_info |= CLASS3;
 853
 854         ndlp->nlp_class_sup = 0;
 855         if (sp->cls1.classValid)
 856                 ndlp->nlp_class_sup |= FC_COS_CLASS1;
 857         if (sp->cls2.classValid)
 858                 ndlp->nlp_class_sup |= FC_COS_CLASS2;
 859         if (sp->cls3.classValid)
 860                 ndlp->nlp_class_sup |= FC_COS_CLASS3;
 861         if (sp->cls4.classValid)
 862                 ndlp->nlp_class_sup |= FC_COS_CLASS4;
 863         ndlp->nlp_maxframe =
 864                 ((sp->cmn.bbRcvSizeMsb & 0x0F) << 8) | sp->cmn.bbRcvSizeLsb;
 865
 866         mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
 867         if (!mbox) {
 868                 lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
 869                         "0133 PLOGI: no memory for reg_login "
 870                         "Data: x%x x%x x%x x%x\n",
 871                         ndlp->nlp_DID, ndlp->nlp_state,
 872                         ndlp->nlp_flag, ndlp->nlp_rpi);
 873                 goto out;
 874         }
 875
 876         lpfc_unreg_rpi(vport, ndlp);
 877
 878         if (lpfc_reg_rpi(phba, vport->vpi, irsp->un.elsreq64.remoteID,
 879                            (uint8_t *) sp, mbox, 0) == 0) {
 880                 switch (ndlp->nlp_DID) {
 881                 case NameServer_DID:
 882                         mbox->mbox_cmpl = lpfc_mbx_cmpl_ns_reg_login;
 883                         break;
 884                 case FDMI_DID:
 885                         mbox->mbox_cmpl = lpfc_mbx_cmpl_fdmi_reg_login;
 886                         break;
 887                 default:
 888                         mbox->mbox_cmpl = lpfc_mbx_cmpl_reg_login;
 889                 }
 890                 mbox->context2 = lpfc_nlp_get(ndlp);
 891                 mbox->vport = vport;
 892                 if (lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT)
 893                     != MBX_NOT_FINISHED) {
 894                         lpfc_nlp_set_state(vport, ndlp,
 895                                            NLP_STE_REG_LOGIN_ISSUE);
 896                         return ndlp->nlp_state;
 897                 }
 898                 /* decrement node reference count to the failed mbox
 899                  * command
 900                  */
 901                 lpfc_nlp_put(ndlp);
 902                 mp = (struct lpfc_dmabuf *) mbox->context1;
 903                 lpfc_mbuf_free(phba, mp->virt, mp->phys);
 904                 kfree(mp);
 905                 mempool_free(mbox, phba->mbox_mem_pool);
 906
 907                 lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
 908                                  "0134 PLOGI: cannot issue reg_login "
 909                                  "Data: x%x x%x x%x x%x\n",
 910                                  ndlp->nlp_DID, ndlp->nlp_state,
 911                                  ndlp->nlp_flag, ndlp->nlp_rpi);
 912         } else {
 913                 mempool_free(mbox, phba->mbox_mem_pool);
 914
 915                 lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
 916                                  "0135 PLOGI: cannot format reg_login "
 917                                  "Data: x%x x%x x%x x%x\n",
 918                                  ndlp->nlp_DID, ndlp->nlp_state,
 919                                  ndlp->nlp_flag, ndlp->nlp_rpi);
 920         }
 921
 922
 923 out:
 924         if (ndlp->nlp_DID == NameServer_DID) {
 925                 lpfc_vport_set_state(vport, FC_VPORT_FAILED);
 926                 lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
 927                                  "0261 Cannot Register NameServer login\n");
 928         }
 929
 930         spin_lock_irq(shost->host_lock);
 931         ndlp->nlp_flag |= NLP_DEFER_RM;
 932         spin_unlock_irq(shost->host_lock);
 933         return NLP_STE_FREED_NODE;
 934 }
 935
 936 static uint32_t
 937 lpfc_cmpl_logo_plogi_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 938                            void *arg, uint32_t evt)
 939 {
 940         return ndlp->nlp_state;
 941 }
 942
 943 static uint32_t
 944 lpfc_cmpl_reglogin_plogi_issue(struct lpfc_vport *vport,
 945         struct lpfc_nodelist *ndlp, void *arg, uint32_t evt)
 946 {
 947         return ndlp->nlp_state;
 948 }
 949
 950 static uint32_t
 951 lpfc_device_rm_plogi_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 952                            void *arg, uint32_t evt)
 953 {
 954         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
 955
 956         if (ndlp->nlp_flag & NLP_NPR_2B_DISC) {
 957                 spin_lock_irq(shost->host_lock);
 958                 ndlp->nlp_flag |= NLP_NODEV_REMOVE;
 959                 spin_unlock_irq(shost->host_lock);
 960                 return ndlp->nlp_state;
 961         } else {
 962                 /* software abort outstanding PLOGI */
 963                 lpfc_els_abort(vport->phba, ndlp);
 964
 965                 lpfc_drop_node(vport, ndlp);
 966                 return NLP_STE_FREED_NODE;
 967         }
 968 }
 969
 970 static uint32_t
 971 lpfc_device_recov_plogi_issue(struct lpfc_vport *vport,
 972                               struct lpfc_nodelist *ndlp,
 973                               void *arg,
 974                               uint32_t evt)
 975 {
 976         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
 977         struct lpfc_hba  *phba = vport->phba;
 978
 979         /* Don't do anything that will mess up processing of the
 980          * previous RSCN.
 981          */
 982         if (vport->fc_flag & FC_RSCN_DEFERRED)
 983                 return ndlp->nlp_state;
 984
 985         /* software abort outstanding PLOGI */
 986         lpfc_els_abort(phba, ndlp);
 987
 988         ndlp->nlp_prev_state = NLP_STE_PLOGI_ISSUE;
 989         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
 990         spin_lock_irq(shost->host_lock);
 991         ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
 992         spin_unlock_irq(shost->host_lock);
 993
 994         return ndlp->nlp_state;
 995 }
 996
 997 static uint32_t
 998 lpfc_rcv_plogi_adisc_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 999                            void *arg, uint32_t evt)
1000 {
1001         struct Scsi_Host   *shost = lpfc_shost_from_vport(vport);
1002         struct lpfc_hba   *phba = vport->phba;
1003         struct lpfc_iocbq *cmdiocb;
1004
1005         /* software abort outstanding ADISC */
1006         lpfc_els_abort(phba, ndlp);
1007
1008         cmdiocb = (struct lpfc_iocbq *) arg;
1009
1010         if (lpfc_rcv_plogi(vport, ndlp, cmdiocb)) {
1011                 if (ndlp->nlp_flag & NLP_NPR_2B_DISC) {
1012                         spin_lock_irq(shost->host_lock);
1013                         ndlp->nlp_flag &= ~NLP_NPR_2B_DISC;
1014                         spin_unlock_irq(shost->host_lock);
1015                         if (vport->num_disc_nodes)
1016                                 lpfc_more_adisc(vport);
1017                 }
1018                 return ndlp->nlp_state;
1019         }
1020         ndlp->nlp_prev_state = NLP_STE_ADISC_ISSUE;
1021         lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0);
1022         lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
1023
1024         return ndlp->nlp_state;
1025 }
1026
1027 static uint32_t
1028 lpfc_rcv_prli_adisc_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1029                           void *arg, uint32_t evt)
1030 {
1031         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1032
1033         lpfc_els_rsp_prli_acc(vport, cmdiocb, ndlp);
1034         return ndlp->nlp_state;
1035 }
1036
1037 static uint32_t
1038 lpfc_rcv_logo_adisc_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1039                           void *arg, uint32_t evt)
1040 {
1041         struct lpfc_hba *phba = vport->phba;
1042         struct lpfc_iocbq *cmdiocb;
1043
1044         cmdiocb = (struct lpfc_iocbq *) arg;
1045
1046         /* software abort outstanding ADISC */
1047         lpfc_els_abort(phba, ndlp);
1048
1049         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_LOGO);
1050         return ndlp->nlp_state;
1051 }
1052
1053 static uint32_t
1054 lpfc_rcv_padisc_adisc_issue(struct lpfc_vport *vport,
1055                             struct lpfc_nodelist *ndlp,
1056                             void *arg, uint32_t evt)
1057 {
1058         struct lpfc_iocbq *cmdiocb;
1059
1060         cmdiocb = (struct lpfc_iocbq *) arg;
1061
1062         lpfc_rcv_padisc(vport, ndlp, cmdiocb);
1063         return ndlp->nlp_state;
1064 }
1065
1066 static uint32_t
1067 lpfc_rcv_prlo_adisc_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1068                           void *arg, uint32_t evt)
1069 {
1070         struct lpfc_iocbq *cmdiocb;
1071
1072         cmdiocb = (struct lpfc_iocbq *) arg;
1073
1074         /* Treat like rcv logo */
1075         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_PRLO);
1076         return ndlp->nlp_state;
1077 }
1078
1079 static uint32_t
1080 lpfc_cmpl_adisc_adisc_issue(struct lpfc_vport *vport,
1081                             struct lpfc_nodelist *ndlp,
1082                             void *arg, uint32_t evt)
1083 {
1084         struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
1085         struct lpfc_hba   *phba = vport->phba;
1086         struct lpfc_iocbq *cmdiocb, *rspiocb;
1087         IOCB_t *irsp;
1088         ADISC *ap;
1089         int rc;
1090
1091         cmdiocb = (struct lpfc_iocbq *) arg;
1092         rspiocb = cmdiocb->context_un.rsp_iocb;
1093
1094         ap = (ADISC *)lpfc_check_elscmpl_iocb(phba, cmdiocb, rspiocb);
1095         irsp = &rspiocb->iocb;
1096
1097         if ((irsp->ulpStatus) ||
1098             (!lpfc_check_adisc(vport, ndlp, &ap->nodeName, &ap->portName))) {
1099                 /* 1 sec timeout */
1100                 mod_timer(&ndlp->nlp_delayfunc, jiffies + HZ);
1101                 spin_lock_irq(shost->host_lock);
1102                 ndlp->nlp_flag |= NLP_DELAY_TMO;
1103                 spin_unlock_irq(shost->host_lock);
1104                 ndlp->nlp_last_elscmd = ELS_CMD_PLOGI;
1105
1106                 memset(&ndlp->nlp_nodename, 0, sizeof(struct lpfc_name));
1107                 memset(&ndlp->nlp_portname, 0, sizeof(struct lpfc_name));
1108
1109                 ndlp->nlp_prev_state = NLP_STE_ADISC_ISSUE;
1110                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1111                 lpfc_unreg_rpi(vport, ndlp);
1112                 return ndlp->nlp_state;
1113         }
1114
1115         if (phba->sli_rev == LPFC_SLI_REV4) {
1116                 rc = lpfc_sli4_resume_rpi(ndlp);
1117                 if (rc) {
1118                         /* Stay in state and retry. */
1119                         ndlp->nlp_prev_state = NLP_STE_ADISC_ISSUE;
1120                         return ndlp->nlp_state;
1121                 }
1122         }
1123
1124         if (ndlp->nlp_type & NLP_FCP_TARGET) {
1125                 ndlp->nlp_prev_state = NLP_STE_ADISC_ISSUE;
1126                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_MAPPED_NODE);
1127         } else {
1128                 ndlp->nlp_prev_state = NLP_STE_ADISC_ISSUE;
1129                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
1130         }
1131
1132         return ndlp->nlp_state;
1133 }
1134
1135 static uint32_t
1136 lpfc_device_rm_adisc_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1137                            void *arg, uint32_t evt)
1138 {
1139         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1140
1141         if (ndlp->nlp_flag & NLP_NPR_2B_DISC) {
1142                 spin_lock_irq(shost->host_lock);
1143                 ndlp->nlp_flag |= NLP_NODEV_REMOVE;
1144                 spin_unlock_irq(shost->host_lock);
1145                 return ndlp->nlp_state;
1146         } else {
1147                 /* software abort outstanding ADISC */
1148                 lpfc_els_abort(vport->phba, ndlp);
1149
1150                 lpfc_drop_node(vport, ndlp);
1151                 return NLP_STE_FREED_NODE;
1152         }
1153 }
1154
1155 static uint32_t
1156 lpfc_device_recov_adisc_issue(struct lpfc_vport *vport,
1157                               struct lpfc_nodelist *ndlp,
1158                               void *arg,
1159                               uint32_t evt)
1160 {
1161         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1162         struct lpfc_hba  *phba = vport->phba;
1163
1164         /* Don't do anything that will mess up processing of the
1165          * previous RSCN.
1166          */
1167         if (vport->fc_flag & FC_RSCN_DEFERRED)
1168                 return ndlp->nlp_state;
1169
1170         /* software abort outstanding ADISC */
1171         lpfc_els_abort(phba, ndlp);
1172
1173         ndlp->nlp_prev_state = NLP_STE_ADISC_ISSUE;
1174         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1175         spin_lock_irq(shost->host_lock);
1176         ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
1177         spin_unlock_irq(shost->host_lock);
1178         lpfc_disc_set_adisc(vport, ndlp);
1179         return ndlp->nlp_state;
1180 }
1181
1182 static uint32_t
1183 lpfc_rcv_plogi_reglogin_issue(struct lpfc_vport *vport,
1184                               struct lpfc_nodelist *ndlp,
1185                               void *arg,
1186                               uint32_t evt)
1187 {
1188         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1189
1190         lpfc_rcv_plogi(vport, ndlp, cmdiocb);
1191         return ndlp->nlp_state;
1192 }
1193
1194 static uint32_t
1195 lpfc_rcv_prli_reglogin_issue(struct lpfc_vport *vport,
1196                              struct lpfc_nodelist *ndlp,
1197                              void *arg,
1198                              uint32_t evt)
1199 {
1200         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1201
1202         lpfc_els_rsp_prli_acc(vport, cmdiocb, ndlp);
1203         return ndlp->nlp_state;
1204 }
1205
1206 static uint32_t
1207 lpfc_rcv_logo_reglogin_issue(struct lpfc_vport *vport,
1208                              struct lpfc_nodelist *ndlp,
1209                              void *arg,
1210                              uint32_t evt)
1211 {
1212         struct lpfc_hba   *phba = vport->phba;
1213         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1214         LPFC_MBOXQ_t      *mb;
1215         LPFC_MBOXQ_t      *nextmb;
1216         struct lpfc_dmabuf *mp;
1217
1218         cmdiocb = (struct lpfc_iocbq *) arg;
1219
1220         /* cleanup any ndlp on mbox q waiting for reglogin cmpl */
1221         if ((mb = phba->sli.mbox_active)) {
1222                 if ((mb->u.mb.mbxCommand == MBX_REG_LOGIN64) &&
1223                    (ndlp == (struct lpfc_nodelist *) mb->context2)) {
1224                         lpfc_nlp_put(ndlp);
1225                         mb->context2 = NULL;
1226                         mb->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
1227                 }
1228         }
1229
1230         spin_lock_irq(&phba->hbalock);
1231         list_for_each_entry_safe(mb, nextmb, &phba->sli.mboxq, list) {
1232                 if ((mb->u.mb.mbxCommand == MBX_REG_LOGIN64) &&
1233                    (ndlp == (struct lpfc_nodelist *) mb->context2)) {
1234                         if (phba->sli_rev == LPFC_SLI_REV4) {
1235                                 spin_unlock_irq(&phba->hbalock);
1236                                 lpfc_sli4_free_rpi(phba,
1237                                         mb->u.mb.un.varRegLogin.rpi);
1238                                 spin_lock_irq(&phba->hbalock);
1239                         }
1240                         mp = (struct lpfc_dmabuf *) (mb->context1);
1241                         if (mp) {
1242                                 __lpfc_mbuf_free(phba, mp->virt, mp->phys);
1243                                 kfree(mp);
1244                         }
1245                         lpfc_nlp_put(ndlp);
1246                         list_del(&mb->list);
1247                         phba->sli.mboxq_cnt--;
1248                         mempool_free(mb, phba->mbox_mem_pool);
1249                 }
1250         }
1251         spin_unlock_irq(&phba->hbalock);
1252
1253         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_LOGO);
1254         return ndlp->nlp_state;
1255 }
1256
1257 static uint32_t
1258 lpfc_rcv_padisc_reglogin_issue(struct lpfc_vport *vport,
1259                                struct lpfc_nodelist *ndlp,
1260                                void *arg,
1261                                uint32_t evt)
1262 {
1263         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1264
1265         lpfc_rcv_padisc(vport, ndlp, cmdiocb);
1266         return ndlp->nlp_state;
1267 }
1268
1269 static uint32_t
1270 lpfc_rcv_prlo_reglogin_issue(struct lpfc_vport *vport,
1271                              struct lpfc_nodelist *ndlp,
1272                              void *arg,
1273                              uint32_t evt)
1274 {
1275         struct lpfc_iocbq *cmdiocb;
1276
1277         cmdiocb = (struct lpfc_iocbq *) arg;
1278         lpfc_els_rsp_acc(vport, ELS_CMD_PRLO, cmdiocb, ndlp, NULL);
1279         return ndlp->nlp_state;
1280 }
1281
1282 static uint32_t
1283 lpfc_cmpl_reglogin_reglogin_issue(struct lpfc_vport *vport,
1284                                   struct lpfc_nodelist *ndlp,
1285                                   void *arg,
1286                                   uint32_t evt)
1287 {
1288         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1289         LPFC_MBOXQ_t *pmb = (LPFC_MBOXQ_t *) arg;
1290         MAILBOX_t *mb = &pmb->u.mb;
1291         uint32_t did  = mb->un.varWords[1];
1292
1293         if (mb->mbxStatus) {
1294                 /* RegLogin failed */
1295                 lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
1296                                 "0246 RegLogin failed Data: x%x x%x x%x\n",
1297                                 did, mb->mbxStatus, vport->port_state);
1298                 /*
1299                  * If RegLogin failed due to lack of HBA resources do not
1300                  * retry discovery.
1301                  */
1302                 if (mb->mbxStatus == MBXERR_RPI_FULL) {
1303                         ndlp->nlp_prev_state = NLP_STE_REG_LOGIN_ISSUE;
1304                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1305                         return ndlp->nlp_state;
1306                 }
1307
1308                 /* Put ndlp in npr state set plogi timer for 1 sec */
1309                 mod_timer(&ndlp->nlp_delayfunc, jiffies + HZ * 1);
1310                 spin_lock_irq(shost->host_lock);
1311                 ndlp->nlp_flag |= NLP_DELAY_TMO;
1312                 spin_unlock_irq(shost->host_lock);
1313                 ndlp->nlp_last_elscmd = ELS_CMD_PLOGI;
1314
1315                 lpfc_issue_els_logo(vport, ndlp, 0);
1316                 ndlp->nlp_prev_state = NLP_STE_REG_LOGIN_ISSUE;
1317                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1318                 return ndlp->nlp_state;
1319         }
1320
1321         ndlp->nlp_rpi = mb->un.varWords[0];
1322         ndlp->nlp_flag |= NLP_RPI_VALID;
1323
1324         /* Only if we are not a fabric nport do we issue PRLI */
1325         if (!(ndlp->nlp_type & NLP_FABRIC)) {
1326                 ndlp->nlp_prev_state = NLP_STE_REG_LOGIN_ISSUE;
1327                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_PRLI_ISSUE);
1328                 lpfc_issue_els_prli(vport, ndlp, 0);
1329         } else {
1330                 ndlp->nlp_prev_state = NLP_STE_REG_LOGIN_ISSUE;
1331                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
1332         }
1333         return ndlp->nlp_state;
1334 }
1335
1336 static uint32_t
1337 lpfc_device_rm_reglogin_issue(struct lpfc_vport *vport,
1338                               struct lpfc_nodelist *ndlp,
1339                               void *arg,
1340                               uint32_t evt)
1341 {
1342         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1343
1344         if (ndlp->nlp_flag & NLP_NPR_2B_DISC) {
1345                 spin_lock_irq(shost->host_lock);
1346                 ndlp->nlp_flag |= NLP_NODEV_REMOVE;
1347                 spin_unlock_irq(shost->host_lock);
1348                 return ndlp->nlp_state;
1349         } else {
1350                 lpfc_drop_node(vport, ndlp);
1351                 return NLP_STE_FREED_NODE;
1352         }
1353 }
1354
1355 static uint32_t
1356 lpfc_device_recov_reglogin_issue(struct lpfc_vport *vport,
1357                                  struct lpfc_nodelist *ndlp,
1358                                  void *arg,
1359                                  uint32_t evt)
1360 {
1361         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1362
1363         /* Don't do anything that will mess up processing of the
1364          * previous RSCN.
1365          */
1366         if (vport->fc_flag & FC_RSCN_DEFERRED)
1367                 return ndlp->nlp_state;
1368
1369         ndlp->nlp_prev_state = NLP_STE_REG_LOGIN_ISSUE;
1370         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1371         spin_lock_irq(shost->host_lock);
1372         ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
1373         spin_unlock_irq(shost->host_lock);
1374         lpfc_disc_set_adisc(vport, ndlp);
1375         return ndlp->nlp_state;
1376 }
1377
1378 static uint32_t
1379 lpfc_rcv_plogi_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1380                           void *arg, uint32_t evt)
1381 {
1382         struct lpfc_iocbq *cmdiocb;
1383
1384         cmdiocb = (struct lpfc_iocbq *) arg;
1385
1386         lpfc_rcv_plogi(vport, ndlp, cmdiocb);
1387         return ndlp->nlp_state;
1388 }
1389
1390 static uint32_t
1391 lpfc_rcv_prli_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1392                          void *arg, uint32_t evt)
1393 {
1394         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1395
1396         lpfc_els_rsp_prli_acc(vport, cmdiocb, ndlp);
1397         return ndlp->nlp_state;
1398 }
1399
1400 static uint32_t
1401 lpfc_rcv_logo_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1402                          void *arg, uint32_t evt)
1403 {
1404         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1405
1406         /* Software abort outstanding PRLI before sending acc */
1407         lpfc_els_abort(vport->phba, ndlp);
1408
1409         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_LOGO);
1410         return ndlp->nlp_state;
1411 }
1412
1413 static uint32_t
1414 lpfc_rcv_padisc_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1415                            void *arg, uint32_t evt)
1416 {
1417         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1418
1419         lpfc_rcv_padisc(vport, ndlp, cmdiocb);
1420         return ndlp->nlp_state;
1421 }
1422
1423 /* This routine is envoked when we rcv a PRLO request from a nport
1424  * we are logged into.  We should send back a PRLO rsp setting the
1425  * appropriate bits.
1426  * NEXT STATE = PRLI_ISSUE
1427  */
1428 static uint32_t
1429 lpfc_rcv_prlo_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1430                          void *arg, uint32_t evt)
1431 {
1432         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1433
1434         lpfc_els_rsp_acc(vport, ELS_CMD_PRLO, cmdiocb, ndlp, NULL);
1435         return ndlp->nlp_state;
1436 }
1437
1438 static uint32_t
1439 lpfc_cmpl_prli_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1440                           void *arg, uint32_t evt)
1441 {
1442         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1443         struct lpfc_iocbq *cmdiocb, *rspiocb;
1444         struct lpfc_hba   *phba = vport->phba;
1445         IOCB_t *irsp;
1446         PRLI *npr;
1447
1448         cmdiocb = (struct lpfc_iocbq *) arg;
1449         rspiocb = cmdiocb->context_un.rsp_iocb;
1450         npr = (PRLI *)lpfc_check_elscmpl_iocb(phba, cmdiocb, rspiocb);
1451
1452         irsp = &rspiocb->iocb;
1453         if (irsp->ulpStatus) {
1454                 if ((vport->port_type == LPFC_NPIV_PORT) &&
1455                     vport->cfg_restrict_login) {
1456                         goto out;
1457                 }
1458                 ndlp->nlp_prev_state = NLP_STE_PRLI_ISSUE;
1459                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
1460                 return ndlp->nlp_state;
1461         }
1462
1463         /* Check out PRLI rsp */
1464         ndlp->nlp_type &= ~(NLP_FCP_TARGET | NLP_FCP_INITIATOR);
1465         ndlp->nlp_fcp_info &= ~NLP_FCP_2_DEVICE;
1466         if ((npr->acceptRspCode == PRLI_REQ_EXECUTED) &&
1467             (npr->prliType == PRLI_FCP_TYPE)) {
1468                 if (npr->initiatorFunc)
1469                         ndlp->nlp_type |= NLP_FCP_INITIATOR;
1470                 if (npr->targetFunc)
1471                         ndlp->nlp_type |= NLP_FCP_TARGET;
1472                 if (npr->Retry)
1473                         ndlp->nlp_fcp_info |= NLP_FCP_2_DEVICE;
1474         }
1475         if (!(ndlp->nlp_type & NLP_FCP_TARGET) &&
1476             (vport->port_type == LPFC_NPIV_PORT) &&
1477              vport->cfg_restrict_login) {
1478 out:
1479                 spin_lock_irq(shost->host_lock);
1480                 ndlp->nlp_flag |= NLP_TARGET_REMOVE;
1481                 spin_unlock_irq(shost->host_lock);
1482                 lpfc_issue_els_logo(vport, ndlp, 0);
1483
1484                 ndlp->nlp_prev_state = NLP_STE_PRLI_ISSUE;
1485                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1486                 return ndlp->nlp_state;
1487         }
1488
1489         ndlp->nlp_prev_state = NLP_STE_PRLI_ISSUE;
1490         if (ndlp->nlp_type & NLP_FCP_TARGET)
1491                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_MAPPED_NODE);
1492         else
1493                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
1494         return ndlp->nlp_state;
1495 }
1496
1497 /*! lpfc_device_rm_prli_issue
1498  *
1499  * \pre
1500  * \post
1501  * \param   phba
1502  * \param   ndlp
1503  * \param   arg
1504  * \param   evt
1505  * \return  uint32_t
1506  *
1507  * \b Description:
1508  *    This routine is envoked when we a request to remove a nport we are in the
1509  *    process of PRLIing. We should software abort outstanding prli, unreg
1510  *    login, send a logout. We will change node state to UNUSED_NODE, put it
1511  *    on plogi list so it can be freed when LOGO completes.
1512  *
1513  */
1514
1515 static uint32_t
1516 lpfc_device_rm_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1517                           void *arg, uint32_t evt)
1518 {
1519         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1520
1521         if (ndlp->nlp_flag & NLP_NPR_2B_DISC) {
1522                 spin_lock_irq(shost->host_lock);
1523                 ndlp->nlp_flag |= NLP_NODEV_REMOVE;
1524                 spin_unlock_irq(shost->host_lock);
1525                 return ndlp->nlp_state;
1526         } else {
1527                 /* software abort outstanding PLOGI */
1528                 lpfc_els_abort(vport->phba, ndlp);
1529
1530                 lpfc_drop_node(vport, ndlp);
1531                 return NLP_STE_FREED_NODE;
1532         }
1533 }
1534
1535
1536 /*! lpfc_device_recov_prli_issue
1537  *
1538  * \pre
1539  * \post
1540  * \param   phba
1541  * \param   ndlp
1542  * \param   arg
1543  * \param   evt
1544  * \return  uint32_t
1545  *
1546  * \b Description:
1547  *    The routine is envoked when the state of a device is unknown, like
1548  *    during a link down. We should remove the nodelist entry from the
1549  *    unmapped list, issue a UNREG_LOGIN, do a software abort of the
1550  *    outstanding PRLI command, then free the node entry.
1551  */
1552 static uint32_t
1553 lpfc_device_recov_prli_issue(struct lpfc_vport *vport,
1554                              struct lpfc_nodelist *ndlp,
1555                              void *arg,
1556                              uint32_t evt)
1557 {
1558         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1559         struct lpfc_hba  *phba = vport->phba;
1560
1561         /* Don't do anything that will mess up processing of the
1562          * previous RSCN.
1563          */
1564         if (vport->fc_flag & FC_RSCN_DEFERRED)
1565                 return ndlp->nlp_state;
1566
1567         /* software abort outstanding PRLI */
1568         lpfc_els_abort(phba, ndlp);
1569
1570         ndlp->nlp_prev_state = NLP_STE_PRLI_ISSUE;
1571         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1572         spin_lock_irq(shost->host_lock);
1573         ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
1574         spin_unlock_irq(shost->host_lock);
1575         lpfc_disc_set_adisc(vport, ndlp);
1576         return ndlp->nlp_state;
1577 }
1578
1579 static uint32_t
1580 lpfc_rcv_plogi_unmap_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1581                           void *arg, uint32_t evt)
1582 {
1583         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1584
1585         lpfc_rcv_plogi(vport, ndlp, cmdiocb);
1586         return ndlp->nlp_state;
1587 }
1588
1589 static uint32_t
1590 lpfc_rcv_prli_unmap_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1591                          void *arg, uint32_t evt)
1592 {
1593         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1594
1595         lpfc_rcv_prli(vport, ndlp, cmdiocb);
1596         lpfc_els_rsp_prli_acc(vport, cmdiocb, ndlp);
1597         return ndlp->nlp_state;
1598 }
1599
1600 static uint32_t
1601 lpfc_rcv_logo_unmap_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1602                          void *arg, uint32_t evt)
1603 {
1604         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1605
1606         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_LOGO);
1607         return ndlp->nlp_state;
1608 }
1609
1610 static uint32_t
1611 lpfc_rcv_padisc_unmap_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1612                            void *arg, uint32_t evt)
1613 {
1614         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1615
1616         lpfc_rcv_padisc(vport, ndlp, cmdiocb);
1617         return ndlp->nlp_state;
1618 }
1619
1620 static uint32_t
1621 lpfc_rcv_prlo_unmap_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1622                          void *arg, uint32_t evt)
1623 {
1624         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1625
1626         lpfc_els_rsp_acc(vport, ELS_CMD_PRLO, cmdiocb, ndlp, NULL);
1627         return ndlp->nlp_state;
1628 }
1629
1630 static uint32_t
1631 lpfc_device_recov_unmap_node(struct lpfc_vport *vport,
1632                              struct lpfc_nodelist *ndlp,
1633                              void *arg,
1634                              uint32_t evt)
1635 {
1636         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1637
1638         ndlp->nlp_prev_state = NLP_STE_UNMAPPED_NODE;
1639         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1640         spin_lock_irq(shost->host_lock);
1641         ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
1642         spin_unlock_irq(shost->host_lock);
1643         lpfc_disc_set_adisc(vport, ndlp);
1644
1645         return ndlp->nlp_state;
1646 }
1647
1648 static uint32_t
1649 lpfc_rcv_plogi_mapped_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1650                            void *arg, uint32_t evt)
1651 {
1652         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1653
1654         lpfc_rcv_plogi(vport, ndlp, cmdiocb);
1655         return ndlp->nlp_state;
1656 }
1657
1658 static uint32_t
1659 lpfc_rcv_prli_mapped_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1660                           void *arg, uint32_t evt)
1661 {
1662         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1663
1664         lpfc_els_rsp_prli_acc(vport, cmdiocb, ndlp);
1665         return ndlp->nlp_state;
1666 }
1667
1668 static uint32_t
1669 lpfc_rcv_logo_mapped_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1670                           void *arg, uint32_t evt)
1671 {
1672         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1673
1674         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_LOGO);
1675         return ndlp->nlp_state;
1676 }
1677
1678 static uint32_t
1679 lpfc_rcv_padisc_mapped_node(struct lpfc_vport *vport,
1680                             struct lpfc_nodelist *ndlp,
1681                             void *arg, uint32_t evt)
1682 {
1683         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1684
1685         lpfc_rcv_padisc(vport, ndlp, cmdiocb);
1686         return ndlp->nlp_state;
1687 }
1688
1689 static uint32_t
1690 lpfc_rcv_prlo_mapped_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1691                           void *arg, uint32_t evt)
1692 {
1693         struct lpfc_hba  *phba = vport->phba;
1694         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1695
1696         /* flush the target */
1697         lpfc_sli_abort_iocb(vport, &phba->sli.ring[phba->sli.fcp_ring],
1698                             ndlp->nlp_sid, 0, LPFC_CTX_TGT);
1699
1700         /* Treat like rcv logo */
1701         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_PRLO);
1702         return ndlp->nlp_state;
1703 }
1704
1705 static uint32_t
1706 lpfc_device_recov_mapped_node(struct lpfc_vport *vport,
1707                               struct lpfc_nodelist *ndlp,
1708                               void *arg,
1709                               uint32_t evt)
1710 {
1711         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1712
1713         ndlp->nlp_prev_state = NLP_STE_MAPPED_NODE;
1714         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1715         spin_lock_irq(shost->host_lock);
1716         ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
1717         spin_unlock_irq(shost->host_lock);
1718         lpfc_disc_set_adisc(vport, ndlp);
1719         return ndlp->nlp_state;
1720 }
1721
1722 static uint32_t
1723 lpfc_rcv_plogi_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1724                         void *arg, uint32_t evt)
1725 {
1726         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1727         struct lpfc_iocbq *cmdiocb  = (struct lpfc_iocbq *) arg;
1728
1729         /* Ignore PLOGI if we have an outstanding LOGO */
1730         if (ndlp->nlp_flag & (NLP_LOGO_SND | NLP_LOGO_ACC))
1731                 return ndlp->nlp_state;
1732         if (lpfc_rcv_plogi(vport, ndlp, cmdiocb)) {
1733                 lpfc_cancel_retry_delay_tmo(vport, ndlp);
1734                 spin_lock_irq(shost->host_lock);
1735                 ndlp->nlp_flag &= ~(NLP_NPR_ADISC | NLP_NPR_2B_DISC);
1736                 spin_unlock_irq(shost->host_lock);
1737         } else if (!(ndlp->nlp_flag & NLP_NPR_2B_DISC)) {
1738                 /* send PLOGI immediately, move to PLOGI issue state */
1739                 if (!(ndlp->nlp_flag & NLP_DELAY_TMO)) {
1740                         ndlp->nlp_prev_state = NLP_STE_NPR_NODE;
1741                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
1742                         lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0);
1743                 }
1744         }
1745         return ndlp->nlp_state;
1746 }
1747
1748 static uint32_t
1749 lpfc_rcv_prli_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1750                        void *arg, uint32_t evt)
1751 {
1752         struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
1753         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1754         struct ls_rjt     stat;
1755
1756         memset(&stat, 0, sizeof (struct ls_rjt));
1757         stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
1758         stat.un.b.lsRjtRsnCodeExp = LSEXP_NOTHING_MORE;
1759         lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
1760
1761         if (!(ndlp->nlp_flag & NLP_DELAY_TMO)) {
1762                 if (ndlp->nlp_flag & NLP_NPR_ADISC) {
1763                         spin_lock_irq(shost->host_lock);
1764                         ndlp->nlp_flag &= ~NLP_NPR_ADISC;
1765                         ndlp->nlp_prev_state = NLP_STE_NPR_NODE;
1766                         spin_unlock_irq(shost->host_lock);
1767                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_ADISC_ISSUE);
1768                         lpfc_issue_els_adisc(vport, ndlp, 0);
1769                 } else {
1770                         ndlp->nlp_prev_state = NLP_STE_NPR_NODE;
1771                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
1772                         lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0);
1773                 }
1774         }
1775         return ndlp->nlp_state;
1776 }
1777
1778 static uint32_t
1779 lpfc_rcv_logo_npr_node(struct lpfc_vport *vport,  struct lpfc_nodelist *ndlp,
1780                        void *arg, uint32_t evt)
1781 {
1782         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1783
1784         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_LOGO);
1785         return ndlp->nlp_state;
1786 }
1787
1788 static uint32_t
1789 lpfc_rcv_padisc_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1790                          void *arg, uint32_t evt)
1791 {
1792         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1793
1794         lpfc_rcv_padisc(vport, ndlp, cmdiocb);
1795         /*
1796          * Do not start discovery if discovery is about to start
1797          * or discovery in progress for this node. Starting discovery
1798          * here will affect the counting of discovery threads.
1799          */
1800         if (!(ndlp->nlp_flag & NLP_DELAY_TMO) &&
1801             !(ndlp->nlp_flag & NLP_NPR_2B_DISC)) {
1802                 if (ndlp->nlp_flag & NLP_NPR_ADISC) {
1803                         ndlp->nlp_flag &= ~NLP_NPR_ADISC;
1804                         ndlp->nlp_prev_state = NLP_STE_NPR_NODE;
1805                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_ADISC_ISSUE);
1806                         lpfc_issue_els_adisc(vport, ndlp, 0);
1807                 } else {
1808                         ndlp->nlp_prev_state = NLP_STE_NPR_NODE;
1809                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
1810                         lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0);
1811                 }
1812         }
1813         return ndlp->nlp_state;
1814 }
1815
1816 static uint32_t
1817 lpfc_rcv_prlo_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1818                        void *arg, uint32_t evt)
1819 {
1820         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1821         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1822
1823         spin_lock_irq(shost->host_lock);
1824         ndlp->nlp_flag |= NLP_LOGO_ACC;
1825         spin_unlock_irq(shost->host_lock);
1826
1827         lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
1828
1829         if ((ndlp->nlp_flag & NLP_DELAY_TMO) == 0) {
1830                 mod_timer(&ndlp->nlp_delayfunc, jiffies + HZ * 1);
1831                 spin_lock_irq(shost->host_lock);
1832                 ndlp->nlp_flag |= NLP_DELAY_TMO;
1833                 ndlp->nlp_flag &= ~NLP_NPR_ADISC;
1834                 spin_unlock_irq(shost->host_lock);
1835                 ndlp->nlp_last_elscmd = ELS_CMD_PLOGI;
1836         } else {
1837                 spin_lock_irq(shost->host_lock);
1838                 ndlp->nlp_flag &= ~NLP_NPR_ADISC;
1839                 spin_unlock_irq(shost->host_lock);
1840         }
1841         return ndlp->nlp_state;
1842 }
1843
1844 static uint32_t
1845 lpfc_cmpl_plogi_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1846                          void *arg, uint32_t evt)
1847 {
1848         struct lpfc_iocbq *cmdiocb, *rspiocb;
1849         IOCB_t *irsp;
1850
1851         cmdiocb = (struct lpfc_iocbq *) arg;
1852         rspiocb = cmdiocb->context_un.rsp_iocb;
1853
1854         irsp = &rspiocb->iocb;
1855         if (irsp->ulpStatus) {
1856                 ndlp->nlp_flag |= NLP_DEFER_RM;
1857                 return NLP_STE_FREED_NODE;
1858         }
1859         return ndlp->nlp_state;
1860 }
1861
1862 static uint32_t
1863 lpfc_cmpl_prli_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1864                         void *arg, uint32_t evt)
1865 {
1866         struct lpfc_iocbq *cmdiocb, *rspiocb;
1867         IOCB_t *irsp;
1868
1869         cmdiocb = (struct lpfc_iocbq *) arg;
1870         rspiocb = cmdiocb->context_un.rsp_iocb;
1871
1872         irsp = &rspiocb->iocb;
1873         if (irsp->ulpStatus && (ndlp->nlp_flag & NLP_NODEV_REMOVE)) {
1874                 lpfc_drop_node(vport, ndlp);
1875                 return NLP_STE_FREED_NODE;
1876         }
1877         return ndlp->nlp_state;
1878 }
1879
1880 static uint32_t
1881 lpfc_cmpl_logo_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1882                         void *arg, uint32_t evt)
1883 {
1884         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1885         if (ndlp->nlp_DID == Fabric_DID) {
1886                 spin_lock_irq(shost->host_lock);
1887                 vport->fc_flag &= ~(FC_FABRIC | FC_PUBLIC_LOOP);
1888                 spin_unlock_irq(shost->host_lock);
1889         }
1890         lpfc_unreg_rpi(vport, ndlp);
1891         return ndlp->nlp_state;
1892 }
1893
1894 static uint32_t
1895 lpfc_cmpl_adisc_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1896                          void *arg, uint32_t evt)
1897 {
1898         struct lpfc_iocbq *cmdiocb, *rspiocb;
1899         IOCB_t *irsp;
1900
1901         cmdiocb = (struct lpfc_iocbq *) arg;
1902         rspiocb = cmdiocb->context_un.rsp_iocb;
1903
1904         irsp = &rspiocb->iocb;
1905         if (irsp->ulpStatus && (ndlp->nlp_flag & NLP_NODEV_REMOVE)) {
1906                 lpfc_drop_node(vport, ndlp);
1907                 return NLP_STE_FREED_NODE;
1908         }
1909         return ndlp->nlp_state;
1910 }
1911
1912 static uint32_t
1913 lpfc_cmpl_reglogin_npr_node(struct lpfc_vport *vport,
1914                             struct lpfc_nodelist *ndlp,
1915                             void *arg, uint32_t evt)
1916 {
1917         LPFC_MBOXQ_t *pmb = (LPFC_MBOXQ_t *) arg;
1918         MAILBOX_t    *mb = &pmb->u.mb;
1919
1920         if (!mb->mbxStatus) {
1921                 ndlp->nlp_rpi = mb->un.varWords[0];
1922                 ndlp->nlp_flag |= NLP_RPI_VALID;
1923         } else {
1924                 if (ndlp->nlp_flag & NLP_NODEV_REMOVE) {
1925                         lpfc_drop_node(vport, ndlp);
1926                         return NLP_STE_FREED_NODE;
1927                 }
1928         }
1929         return ndlp->nlp_state;
1930 }
1931
1932 static uint32_t
1933 lpfc_device_rm_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1934                         void *arg, uint32_t evt)
1935 {
1936         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1937
1938         if (ndlp->nlp_flag & NLP_NPR_2B_DISC) {
1939                 spin_lock_irq(shost->host_lock);
1940                 ndlp->nlp_flag |= NLP_NODEV_REMOVE;
1941                 spin_unlock_irq(shost->host_lock);
1942                 return ndlp->nlp_state;
1943         }
1944         lpfc_drop_node(vport, ndlp);
1945         return NLP_STE_FREED_NODE;
1946 }
1947
1948 static uint32_t
1949 lpfc_device_recov_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1950                            void *arg, uint32_t evt)
1951 {
1952         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1953
1954         /* Don't do anything that will mess up processing of the
1955          * previous RSCN.
1956          */
1957         if (vport->fc_flag & FC_RSCN_DEFERRED)
1958                 return ndlp->nlp_state;
1959
1960         lpfc_cancel_retry_delay_tmo(vport, ndlp);
1961         spin_lock_irq(shost->host_lock);
1962         ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
1963         spin_unlock_irq(shost->host_lock);
1964         return ndlp->nlp_state;
1965 }
1966
1967
1968 /* This next section defines the NPort Discovery State Machine */
1969
1970 /* There are 4 different double linked lists nodelist entries can reside on.
1971  * The plogi list and adisc list are used when Link Up discovery or RSCN
1972  * processing is needed. Each list holds the nodes that we will send PLOGI
1973  * or ADISC on. These lists will keep track of what nodes will be effected
1974  * by an RSCN, or a Link Up (Typically, all nodes are effected on Link Up).
1975  * The unmapped_list will contain all nodes that we have successfully logged
1976  * into at the Fibre Channel level. The mapped_list will contain all nodes
1977  * that are mapped FCP targets.
1978  */
1979 /*
1980  * The bind list is a list of undiscovered (potentially non-existent) nodes
1981  * that we have saved binding information on. This information is used when
1982  * nodes transition from the unmapped to the mapped list.
1983  */
1984 /* For UNUSED_NODE state, the node has just been allocated .
1985  * For PLOGI_ISSUE and REG_LOGIN_ISSUE, the node is on
1986  * the PLOGI list. For REG_LOGIN_COMPL, the node is taken off the PLOGI list
1987  * and put on the unmapped list. For ADISC processing, the node is taken off
1988  * the ADISC list and placed on either the mapped or unmapped list (depending
1989  * on its previous state). Once on the unmapped list, a PRLI is issued and the
1990  * state changed to PRLI_ISSUE. When the PRLI completion occurs, the state is
1991  * changed to UNMAPPED_NODE. If the completion indicates a mapped
1992  * node, the node is taken off the unmapped list. The binding list is checked
1993  * for a valid binding, or a binding is automatically assigned. If binding
1994  * assignment is unsuccessful, the node is left on the unmapped list. If
1995  * binding assignment is successful, the associated binding list entry (if
1996  * any) is removed, and the node is placed on the mapped list.
1997  */
1998 /*
1999  * For a Link Down, all nodes on the ADISC, PLOGI, unmapped or mapped
2000  * lists will receive a DEVICE_RECOVERY event. If the linkdown or devloss timers
2001  * expire, all effected nodes will receive a DEVICE_RM event.
2002  */
2003 /*
2004  * For a Link Up or RSCN, all nodes will move from the mapped / unmapped lists
2005  * to either the ADISC or PLOGI list.  After a Nameserver query or ALPA loopmap
2006  * check, additional nodes may be added or removed (via DEVICE_RM) to / from
2007  * the PLOGI or ADISC lists. Once the PLOGI and ADISC lists are populated,
2008  * we will first process the ADISC list.  32 entries are processed initially and
2009  * ADISC is initited for each one.  Completions / Events for each node are
2010  * funnelled thru the state machine.  As each node finishes ADISC processing, it
2011  * starts ADISC for any nodes waiting for ADISC processing. If no nodes are
2012  * waiting, and the ADISC list count is identically 0, then we are done. For
2013  * Link Up discovery, since all nodes on the PLOGI list are UNREG_LOGIN'ed, we
2014  * can issue a CLEAR_LA and reenable Link Events. Next we will process the PLOGI
2015  * list.  32 entries are processed initially and PLOGI is initited for each one.
2016  * Completions / Events for each node are funnelled thru the state machine.  As
2017  * each node finishes PLOGI processing, it starts PLOGI for any nodes waiting
2018  * for PLOGI processing. If no nodes are waiting, and the PLOGI list count is
2019  * indentically 0, then we are done. We have now completed discovery / RSCN
2020  * handling. Upon completion, ALL nodes should be on either the mapped or
2021  * unmapped lists.
2022  */
2023
2024 static uint32_t (*lpfc_disc_action[NLP_STE_MAX_STATE * NLP_EVT_MAX_EVENT])
2025      (struct lpfc_vport *, struct lpfc_nodelist *, void *, uint32_t) = {
2026         /* Action routine                  Event       Current State  */
2027         lpfc_rcv_plogi_unused_node,     /* RCV_PLOGI   UNUSED_NODE    */
2028         lpfc_rcv_els_unused_node,       /* RCV_PRLI        */
2029         lpfc_rcv_logo_unused_node,      /* RCV_LOGO        */
2030         lpfc_rcv_els_unused_node,       /* RCV_ADISC       */
2031         lpfc_rcv_els_unused_node,       /* RCV_PDISC       */
2032         lpfc_rcv_els_unused_node,       /* RCV_PRLO        */
2033         lpfc_disc_illegal,              /* CMPL_PLOGI      */
2034         lpfc_disc_illegal,              /* CMPL_PRLI       */
2035         lpfc_cmpl_logo_unused_node,     /* CMPL_LOGO       */
2036         lpfc_disc_illegal,              /* CMPL_ADISC      */
2037         lpfc_disc_illegal,              /* CMPL_REG_LOGIN  */
2038         lpfc_device_rm_unused_node,     /* DEVICE_RM       */
2039         lpfc_disc_illegal,              /* DEVICE_RECOVERY */
2040
2041         lpfc_rcv_plogi_plogi_issue,     /* RCV_PLOGI   PLOGI_ISSUE    */
2042         lpfc_rcv_prli_plogi_issue,      /* RCV_PRLI        */
2043         lpfc_rcv_logo_plogi_issue,      /* RCV_LOGO        */
2044         lpfc_rcv_els_plogi_issue,       /* RCV_ADISC       */
2045         lpfc_rcv_els_plogi_issue,       /* RCV_PDISC       */
2046         lpfc_rcv_els_plogi_issue,       /* RCV_PRLO        */
2047         lpfc_cmpl_plogi_plogi_issue,    /* CMPL_PLOGI      */
2048         lpfc_disc_illegal,              /* CMPL_PRLI       */
2049         lpfc_cmpl_logo_plogi_issue,     /* CMPL_LOGO       */
2050         lpfc_disc_illegal,              /* CMPL_ADISC      */
2051         lpfc_cmpl_reglogin_plogi_issue,/* CMPL_REG_LOGIN  */
2052         lpfc_device_rm_plogi_issue,     /* DEVICE_RM       */
2053         lpfc_device_recov_plogi_issue,  /* DEVICE_RECOVERY */
2054
2055         lpfc_rcv_plogi_adisc_issue,     /* RCV_PLOGI   ADISC_ISSUE    */
2056         lpfc_rcv_prli_adisc_issue,      /* RCV_PRLI        */
2057         lpfc_rcv_logo_adisc_issue,      /* RCV_LOGO        */
2058         lpfc_rcv_padisc_adisc_issue,    /* RCV_ADISC       */
2059         lpfc_rcv_padisc_adisc_issue,    /* RCV_PDISC       */
2060         lpfc_rcv_prlo_adisc_issue,      /* RCV_PRLO        */
2061         lpfc_disc_illegal,              /* CMPL_PLOGI      */
2062         lpfc_disc_illegal,              /* CMPL_PRLI       */
2063         lpfc_disc_illegal,              /* CMPL_LOGO       */
2064         lpfc_cmpl_adisc_adisc_issue,    /* CMPL_ADISC      */
2065         lpfc_disc_illegal,              /* CMPL_REG_LOGIN  */
2066         lpfc_device_rm_adisc_issue,     /* DEVICE_RM       */
2067         lpfc_device_recov_adisc_issue,  /* DEVICE_RECOVERY */
2068
2069         lpfc_rcv_plogi_reglogin_issue,  /* RCV_PLOGI  REG_LOGIN_ISSUE */
2070         lpfc_rcv_prli_reglogin_issue,   /* RCV_PLOGI       */
2071         lpfc_rcv_logo_reglogin_issue,   /* RCV_LOGO        */
2072         lpfc_rcv_padisc_reglogin_issue, /* RCV_ADISC       */
2073         lpfc_rcv_padisc_reglogin_issue, /* RCV_PDISC       */
2074         lpfc_rcv_prlo_reglogin_issue,   /* RCV_PRLO        */
2075         lpfc_cmpl_plogi_illegal,        /* CMPL_PLOGI      */
2076         lpfc_disc_illegal,              /* CMPL_PRLI       */
2077         lpfc_disc_illegal,              /* CMPL_LOGO       */
2078         lpfc_disc_illegal,              /* CMPL_ADISC      */
2079         lpfc_cmpl_reglogin_reglogin_issue,/* CMPL_REG_LOGIN  */
2080         lpfc_device_rm_reglogin_issue,  /* DEVICE_RM       */
2081         lpfc_device_recov_reglogin_issue,/* DEVICE_RECOVERY */
2082
2083         lpfc_rcv_plogi_prli_issue,      /* RCV_PLOGI   PRLI_ISSUE     */
2084         lpfc_rcv_prli_prli_issue,       /* RCV_PRLI        */
2085         lpfc_rcv_logo_prli_issue,       /* RCV_LOGO        */
2086         lpfc_rcv_padisc_prli_issue,     /* RCV_ADISC       */
2087         lpfc_rcv_padisc_prli_issue,     /* RCV_PDISC       */
2088         lpfc_rcv_prlo_prli_issue,       /* RCV_PRLO        */
2089         lpfc_cmpl_plogi_illegal,        /* CMPL_PLOGI      */
2090         lpfc_cmpl_prli_prli_issue,      /* CMPL_PRLI       */
2091         lpfc_disc_illegal,              /* CMPL_LOGO       */
2092         lpfc_disc_illegal,              /* CMPL_ADISC      */
2093         lpfc_disc_illegal,              /* CMPL_REG_LOGIN  */
2094         lpfc_device_rm_prli_issue,      /* DEVICE_RM       */
2095         lpfc_device_recov_prli_issue,   /* DEVICE_RECOVERY */
2096
2097         lpfc_rcv_plogi_unmap_node,      /* RCV_PLOGI   UNMAPPED_NODE  */
2098         lpfc_rcv_prli_unmap_node,       /* RCV_PRLI        */
2099         lpfc_rcv_logo_unmap_node,       /* RCV_LOGO        */
2100         lpfc_rcv_padisc_unmap_node,     /* RCV_ADISC       */
2101         lpfc_rcv_padisc_unmap_node,     /* RCV_PDISC       */
2102         lpfc_rcv_prlo_unmap_node,       /* RCV_PRLO        */
2103         lpfc_disc_illegal,              /* CMPL_PLOGI      */
2104         lpfc_disc_illegal,              /* CMPL_PRLI       */
2105         lpfc_disc_illegal,              /* CMPL_LOGO       */
2106         lpfc_disc_illegal,              /* CMPL_ADISC      */
2107         lpfc_disc_illegal,              /* CMPL_REG_LOGIN  */
2108         lpfc_disc_illegal,              /* DEVICE_RM       */
2109         lpfc_device_recov_unmap_node,   /* DEVICE_RECOVERY */
2110
2111         lpfc_rcv_plogi_mapped_node,     /* RCV_PLOGI   MAPPED_NODE    */
2112         lpfc_rcv_prli_mapped_node,      /* RCV_PRLI        */
2113         lpfc_rcv_logo_mapped_node,      /* RCV_LOGO        */
2114         lpfc_rcv_padisc_mapped_node,    /* RCV_ADISC       */
2115         lpfc_rcv_padisc_mapped_node,    /* RCV_PDISC       */
2116         lpfc_rcv_prlo_mapped_node,      /* RCV_PRLO        */
2117         lpfc_disc_illegal,              /* CMPL_PLOGI      */
2118         lpfc_disc_illegal,              /* CMPL_PRLI       */
2119         lpfc_disc_illegal,              /* CMPL_LOGO       */
2120         lpfc_disc_illegal,              /* CMPL_ADISC      */
2121         lpfc_disc_illegal,              /* CMPL_REG_LOGIN  */
2122         lpfc_disc_illegal,              /* DEVICE_RM       */
2123         lpfc_device_recov_mapped_node,  /* DEVICE_RECOVERY */
2124
2125         lpfc_rcv_plogi_npr_node,        /* RCV_PLOGI   NPR_NODE    */
2126         lpfc_rcv_prli_npr_node,         /* RCV_PRLI        */
2127         lpfc_rcv_logo_npr_node,         /* RCV_LOGO        */
2128         lpfc_rcv_padisc_npr_node,       /* RCV_ADISC       */
2129         lpfc_rcv_padisc_npr_node,       /* RCV_PDISC       */
2130         lpfc_rcv_prlo_npr_node,         /* RCV_PRLO        */
2131         lpfc_cmpl_plogi_npr_node,       /* CMPL_PLOGI      */
2132         lpfc_cmpl_prli_npr_node,        /* CMPL_PRLI       */
2133         lpfc_cmpl_logo_npr_node,        /* CMPL_LOGO       */
2134         lpfc_cmpl_adisc_npr_node,       /* CMPL_ADISC      */
2135         lpfc_cmpl_reglogin_npr_node,    /* CMPL_REG_LOGIN  */
2136         lpfc_device_rm_npr_node,        /* DEVICE_RM       */
2137         lpfc_device_recov_npr_node,     /* DEVICE_RECOVERY */
2138 };
2139
2140 int
2141 lpfc_disc_state_machine(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
2142                         void *arg, uint32_t evt)
2143 {
2144         uint32_t cur_state, rc;
2145         uint32_t(*func) (struct lpfc_vport *, struct lpfc_nodelist *, void *,
2146                          uint32_t);
2147         uint32_t got_ndlp = 0;
2148
2149         if (lpfc_nlp_get(ndlp))
2150                 got_ndlp = 1;
2151
2152         cur_state = ndlp->nlp_state;
2153
2154         /* DSM in event <evt> on NPort <nlp_DID> in state <cur_state> */
2155         lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
2156                          "0211 DSM in event x%x on NPort x%x in "
2157                          "state %d Data: x%x\n",
2158                          evt, ndlp->nlp_DID, cur_state, ndlp->nlp_flag);
2159
2160         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_DSM,
2161                  "DSM in:          evt:%d ste:%d did:x%x",
2162                 evt, cur_state, ndlp->nlp_DID);
2163
2164         func = lpfc_disc_action[(cur_state * NLP_EVT_MAX_EVENT) + evt];
2165         rc = (func) (vport, ndlp, arg, evt);
2166
2167         /* DSM out state <rc> on NPort <nlp_DID> */
2168         if (got_ndlp) {
2169                 lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
2170                          "0212 DSM out state %d on NPort x%x Data: x%x\n",
2171                          rc, ndlp->nlp_DID, ndlp->nlp_flag);
2172
2173                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_DSM,
2174                         "DSM out:         ste:%d did:x%x flg:x%x",
2175                         rc, ndlp->nlp_DID, ndlp->nlp_flag);
2176                 /* Decrement the ndlp reference count held for this function */
2177                 lpfc_nlp_put(ndlp);
2178         } else {
2179                 lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
2180                         "0213 DSM out state %d on NPort free\n", rc);
2181
2182                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_DSM,
2183                         "DSM out:         ste:%d did:x%x flg:x%x",
2184                         rc, 0, 0);
2185         }
2186
2187         return rc;
2188 }