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) 2004-2012 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         /* First, we MUST have a RPI registered */
  52         if (!(ndlp->nlp_flag & NLP_RPI_REGISTERED))
  53                 return 0;
  54
  55         /* Compare the ADISC rsp WWNN / WWPN matches our internal node
  56          * table entry for that node.
  57          */
  58         if (memcmp(nn, &ndlp->nlp_nodename, sizeof (struct lpfc_name)))
  59                 return 0;
  60
  61         if (memcmp(pn, &ndlp->nlp_portname, sizeof (struct lpfc_name)))
  62                 return 0;
  63
  64         /* we match, return success */
  65         return 1;
  66 }
  67
  68 int
  69 lpfc_check_sparm(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
  70                  struct serv_parm *sp, uint32_t class, int flogi)
  71 {
  72         volatile struct serv_parm *hsp = &vport->fc_sparam;
  73         uint16_t hsp_value, ssp_value = 0;
  74
  75         /*
  76          * The receive data field size and buffer-to-buffer receive data field
  77          * size entries are 16 bits but are represented as two 8-bit fields in
  78          * the driver data structure to account for rsvd bits and other control
  79          * bits.  Reconstruct and compare the fields as a 16-bit values before
  80          * correcting the byte values.
  81          */
  82         if (sp->cls1.classValid) {
  83                 if (!flogi) {
  84                         hsp_value = ((hsp->cls1.rcvDataSizeMsb << 8) |
  85                                      hsp->cls1.rcvDataSizeLsb);
  86                         ssp_value = ((sp->cls1.rcvDataSizeMsb << 8) |
  87                                      sp->cls1.rcvDataSizeLsb);
  88                         if (!ssp_value)
  89                                 goto bad_service_param;
  90                         if (ssp_value > hsp_value) {
  91                                 sp->cls1.rcvDataSizeLsb =
  92                                         hsp->cls1.rcvDataSizeLsb;
  93                                 sp->cls1.rcvDataSizeMsb =
  94                                         hsp->cls1.rcvDataSizeMsb;
  95                         }
  96                 }
  97         } else if (class == CLASS1)
  98                 goto bad_service_param;
  99         if (sp->cls2.classValid) {
 100                 if (!flogi) {
 101                         hsp_value = ((hsp->cls2.rcvDataSizeMsb << 8) |
 102                                      hsp->cls2.rcvDataSizeLsb);
 103                         ssp_value = ((sp->cls2.rcvDataSizeMsb << 8) |
 104                                      sp->cls2.rcvDataSizeLsb);
 105                         if (!ssp_value)
 106                                 goto bad_service_param;
 107                         if (ssp_value > hsp_value) {
 108                                 sp->cls2.rcvDataSizeLsb =
 109                                         hsp->cls2.rcvDataSizeLsb;
 110                                 sp->cls2.rcvDataSizeMsb =
 111                                         hsp->cls2.rcvDataSizeMsb;
 112                         }
 113                 }
 114         } else if (class == CLASS2)
 115                 goto bad_service_param;
 116         if (sp->cls3.classValid) {
 117                 if (!flogi) {
 118                         hsp_value = ((hsp->cls3.rcvDataSizeMsb << 8) |
 119                                      hsp->cls3.rcvDataSizeLsb);
 120                         ssp_value = ((sp->cls3.rcvDataSizeMsb << 8) |
 121                                      sp->cls3.rcvDataSizeLsb);
 122                         if (!ssp_value)
 123                                 goto bad_service_param;
 124                         if (ssp_value > hsp_value) {
 125                                 sp->cls3.rcvDataSizeLsb =
 126                                         hsp->cls3.rcvDataSizeLsb;
 127                                 sp->cls3.rcvDataSizeMsb =
 128                                         hsp->cls3.rcvDataSizeMsb;
 129                         }
 130                 }
 131         } else if (class == CLASS3)
 132                 goto bad_service_param;
 133
 134         /*
 135          * Preserve the upper four bits of the MSB from the PLOGI response.
 136          * These bits contain the Buffer-to-Buffer State Change Number
 137          * from the target and need to be passed to the FW.
 138          */
 139         hsp_value = (hsp->cmn.bbRcvSizeMsb << 8) | hsp->cmn.bbRcvSizeLsb;
 140         ssp_value = (sp->cmn.bbRcvSizeMsb << 8) | sp->cmn.bbRcvSizeLsb;
 141         if (ssp_value > hsp_value) {
 142                 sp->cmn.bbRcvSizeLsb = hsp->cmn.bbRcvSizeLsb;
 143                 sp->cmn.bbRcvSizeMsb = (sp->cmn.bbRcvSizeMsb & 0xF0) |
 144                                        (hsp->cmn.bbRcvSizeMsb & 0x0F);
 145         }
 146
 147         memcpy(&ndlp->nlp_nodename, &sp->nodeName, sizeof (struct lpfc_name));
 148         memcpy(&ndlp->nlp_portname, &sp->portName, sizeof (struct lpfc_name));
 149         return 1;
 150 bad_service_param:
 151         lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
 152                          "0207 Device %x "
 153                          "(%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x) sent "
 154                          "invalid service parameters.  Ignoring device.\n",
 155                          ndlp->nlp_DID,
 156                          sp->nodeName.u.wwn[0], sp->nodeName.u.wwn[1],
 157                          sp->nodeName.u.wwn[2], sp->nodeName.u.wwn[3],
 158                          sp->nodeName.u.wwn[4], sp->nodeName.u.wwn[5],
 159                          sp->nodeName.u.wwn[6], sp->nodeName.u.wwn[7]);
 160         return 0;
 161 }
 162
 163 static void *
 164 lpfc_check_elscmpl_iocb(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
 165                         struct lpfc_iocbq *rspiocb)
 166 {
 167         struct lpfc_dmabuf *pcmd, *prsp;
 168         uint32_t *lp;
 169         void     *ptr = NULL;
 170         IOCB_t   *irsp;
 171
 172         irsp = &rspiocb->iocb;
 173         pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
 174
 175         /* For lpfc_els_abort, context2 could be zero'ed to delay
 176          * freeing associated memory till after ABTS completes.
 177          */
 178         if (pcmd) {
 179                 prsp =  list_get_first(&pcmd->list, struct lpfc_dmabuf,
 180                                        list);
 181                 if (prsp) {
 182                         lp = (uint32_t *) prsp->virt;
 183                         ptr = (void *)((uint8_t *)lp + sizeof(uint32_t));
 184                 }
 185         } else {
 186                 /* Force ulpStatus error since we are returning NULL ptr */
 187                 if (!(irsp->ulpStatus)) {
 188                         irsp->ulpStatus = IOSTAT_LOCAL_REJECT;
 189                         irsp->un.ulpWord[4] = IOERR_SLI_ABORTED;
 190                 }
 191                 ptr = NULL;
 192         }
 193         return ptr;
 194 }
 195
 196
 197
 198 /*
 199  * Free resources / clean up outstanding I/Os
 200  * associated with a LPFC_NODELIST entry. This
 201  * routine effectively results in a "software abort".
 202  */
 203 int
 204 lpfc_els_abort(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
 205 {
 206         LIST_HEAD(completions);
 207         LIST_HEAD(txcmplq_completions);
 208         LIST_HEAD(abort_list);
 209         struct lpfc_sli  *psli = &phba->sli;
 210         struct lpfc_sli_ring *pring = &psli->ring[LPFC_ELS_RING];
 211         struct lpfc_iocbq *iocb, *next_iocb;
 212
 213         /* Abort outstanding I/O on NPort <nlp_DID> */
 214         lpfc_printf_vlog(ndlp->vport, KERN_INFO, LOG_DISCOVERY,
 215                          "2819 Abort outstanding I/O on NPort x%x "
 216                          "Data: x%x x%x x%x\n",
 217                          ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
 218                          ndlp->nlp_rpi);
 219
 220         lpfc_fabric_abort_nport(ndlp);
 221
 222         /* First check the txq */
 223         spin_lock_irq(&phba->hbalock);
 224         list_for_each_entry_safe(iocb, next_iocb, &pring->txq, list) {
 225                 /* Check to see if iocb matches the nport we are looking for */
 226                 if (lpfc_check_sli_ndlp(phba, pring, iocb, ndlp)) {
 227                         /* It matches, so deque and call compl with anp error */
 228                         list_move_tail(&iocb->list, &completions);
 229                         pring->txq_cnt--;
 230                 }
 231         }
 232
 233         /* Next check the txcmplq */
 234         list_splice_init(&pring->txcmplq, &txcmplq_completions);
 235         spin_unlock_irq(&phba->hbalock);
 236
 237         list_for_each_entry_safe(iocb, next_iocb, &txcmplq_completions, list) {
 238                 /* Check to see if iocb matches the nport we are looking for */
 239                 if (lpfc_check_sli_ndlp(phba, pring, iocb, ndlp))
 240                         list_add_tail(&iocb->dlist, &abort_list);
 241         }
 242         spin_lock_irq(&phba->hbalock);
 243         list_splice(&txcmplq_completions, &pring->txcmplq);
 244         spin_unlock_irq(&phba->hbalock);
 245
 246         list_for_each_entry_safe(iocb, next_iocb, &abort_list, dlist) {
 247                         spin_lock_irq(&phba->hbalock);
 248                         list_del_init(&iocb->dlist);
 249                         lpfc_sli_issue_abort_iotag(phba, pring, iocb);
 250                         spin_unlock_irq(&phba->hbalock);
 251         }
 252
 253         /* Cancel all the IOCBs from the completions list */
 254         lpfc_sli_cancel_iocbs(phba, &completions, IOSTAT_LOCAL_REJECT,
 255                               IOERR_SLI_ABORTED);
 256
 257         lpfc_cancel_retry_delay_tmo(phba->pport, ndlp);
 258         return 0;
 259 }
 260
 261 static int
 262 lpfc_rcv_plogi(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 263                struct lpfc_iocbq *cmdiocb)
 264 {
 265         struct Scsi_Host   *shost = lpfc_shost_from_vport(vport);
 266         struct lpfc_hba    *phba = vport->phba;
 267         struct lpfc_dmabuf *pcmd;
 268         uint32_t *lp;
 269         IOCB_t *icmd;
 270         struct serv_parm *sp;
 271         LPFC_MBOXQ_t *mbox;
 272         struct ls_rjt stat;
 273         int rc;
 274
 275         memset(&stat, 0, sizeof (struct ls_rjt));
 276         if (vport->port_state <= LPFC_FDISC) {
 277                 /* Before responding to PLOGI, check for pt2pt mode.
 278                  * If we are pt2pt, with an outstanding FLOGI, abort
 279                  * the FLOGI and resend it first.
 280                  */
 281                 if (vport->fc_flag & FC_PT2PT) {
 282                          lpfc_els_abort_flogi(phba);
 283                         if (!(vport->fc_flag & FC_PT2PT_PLOGI)) {
 284                                 /* If the other side is supposed to initiate
 285                                  * the PLOGI anyway, just ACC it now and
 286                                  * move on with discovery.
 287                                  */
 288                                 phba->fc_edtov = FF_DEF_EDTOV;
 289                                 phba->fc_ratov = FF_DEF_RATOV;
 290                                 /* Start discovery - this should just do
 291                                    CLEAR_LA */
 292                                 lpfc_disc_start(vport);
 293                         } else
 294                                 lpfc_initial_flogi(vport);
 295                 } else {
 296                         stat.un.b.lsRjtRsnCode = LSRJT_LOGICAL_BSY;
 297                         stat.un.b.lsRjtRsnCodeExp = LSEXP_NOTHING_MORE;
 298                         lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb,
 299                                             ndlp, NULL);
 300                         return 0;
 301                 }
 302         }
 303         pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
 304         lp = (uint32_t *) pcmd->virt;
 305         sp = (struct serv_parm *) ((uint8_t *) lp + sizeof (uint32_t));
 306         if (wwn_to_u64(sp->portName.u.wwn) == 0) {
 307                 lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
 308                                  "0140 PLOGI Reject: invalid nname\n");
 309                 stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
 310                 stat.un.b.lsRjtRsnCodeExp = LSEXP_INVALID_PNAME;
 311                 lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp,
 312                         NULL);
 313                 return 0;
 314         }
 315         if (wwn_to_u64(sp->nodeName.u.wwn) == 0) {
 316                 lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
 317                                  "0141 PLOGI Reject: invalid pname\n");
 318                 stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
 319                 stat.un.b.lsRjtRsnCodeExp = LSEXP_INVALID_NNAME;
 320                 lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp,
 321                         NULL);
 322                 return 0;
 323         }
 324         if ((lpfc_check_sparm(vport, ndlp, sp, CLASS3, 0) == 0)) {
 325                 /* Reject this request because invalid parameters */
 326                 stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
 327                 stat.un.b.lsRjtRsnCodeExp = LSEXP_SPARM_OPTIONS;
 328                 lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp,
 329                         NULL);
 330                 return 0;
 331         }
 332         icmd = &cmdiocb->iocb;
 333
 334         /* PLOGI chkparm OK */
 335         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
 336                          "0114 PLOGI chkparm OK Data: x%x x%x x%x x%x\n",
 337                          ndlp->nlp_DID, ndlp->nlp_state, ndlp->nlp_flag,
 338                          ndlp->nlp_rpi);
 339
 340         if (vport->cfg_fcp_class == 2 && sp->cls2.classValid)
 341                 ndlp->nlp_fcp_info |= CLASS2;
 342         else
 343                 ndlp->nlp_fcp_info |= CLASS3;
 344
 345         ndlp->nlp_class_sup = 0;
 346         if (sp->cls1.classValid)
 347                 ndlp->nlp_class_sup |= FC_COS_CLASS1;
 348         if (sp->cls2.classValid)
 349                 ndlp->nlp_class_sup |= FC_COS_CLASS2;
 350         if (sp->cls3.classValid)
 351                 ndlp->nlp_class_sup |= FC_COS_CLASS3;
 352         if (sp->cls4.classValid)
 353                 ndlp->nlp_class_sup |= FC_COS_CLASS4;
 354         ndlp->nlp_maxframe =
 355                 ((sp->cmn.bbRcvSizeMsb & 0x0F) << 8) | sp->cmn.bbRcvSizeLsb;
 356
 357         /* no need to reg_login if we are already in one of these states */
 358         switch (ndlp->nlp_state) {
 359         case  NLP_STE_NPR_NODE:
 360                 if (!(ndlp->nlp_flag & NLP_NPR_ADISC))
 361                         break;
 362         case  NLP_STE_REG_LOGIN_ISSUE:
 363         case  NLP_STE_PRLI_ISSUE:
 364         case  NLP_STE_UNMAPPED_NODE:
 365         case  NLP_STE_MAPPED_NODE:
 366                 lpfc_els_rsp_acc(vport, ELS_CMD_PLOGI, cmdiocb, ndlp, NULL);
 367                 return 1;
 368         }
 369
 370         if ((vport->fc_flag & FC_PT2PT) &&
 371             !(vport->fc_flag & FC_PT2PT_PLOGI)) {
 372                 /* rcv'ed PLOGI decides what our NPortId will be */
 373                 vport->fc_myDID = icmd->un.rcvels.parmRo;
 374                 mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
 375                 if (mbox == NULL)
 376                         goto out;
 377                 lpfc_config_link(phba, mbox);
 378                 mbox->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
 379                 mbox->vport = vport;
 380                 rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
 381                 if (rc == MBX_NOT_FINISHED) {
 382                         mempool_free(mbox, phba->mbox_mem_pool);
 383                         goto out;
 384                 }
 385
 386                 lpfc_can_disctmo(vport);
 387         }
 388         mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
 389         if (!mbox)
 390                 goto out;
 391
 392         /* Registering an existing RPI behaves differently for SLI3 vs SLI4 */
 393         if (phba->sli_rev == LPFC_SLI_REV4)
 394                 lpfc_unreg_rpi(vport, ndlp);
 395
 396         rc = lpfc_reg_rpi(phba, vport->vpi, icmd->un.rcvels.remoteID,
 397                             (uint8_t *) sp, mbox, ndlp->nlp_rpi);
 398         if (rc) {
 399                 mempool_free(mbox, phba->mbox_mem_pool);
 400                 goto out;
 401         }
 402
 403         /* ACC PLOGI rsp command needs to execute first,
 404          * queue this mbox command to be processed later.
 405          */
 406         mbox->mbox_cmpl = lpfc_mbx_cmpl_reg_login;
 407         /*
 408          * mbox->context2 = lpfc_nlp_get(ndlp) deferred until mailbox
 409          * command issued in lpfc_cmpl_els_acc().
 410          */
 411         mbox->vport = vport;
 412         spin_lock_irq(shost->host_lock);
 413         ndlp->nlp_flag |= (NLP_ACC_REGLOGIN | NLP_RCV_PLOGI);
 414         spin_unlock_irq(shost->host_lock);
 415
 416         /*
 417          * If there is an outstanding PLOGI issued, abort it before
 418          * sending ACC rsp for received PLOGI. If pending plogi
 419          * is not canceled here, the plogi will be rejected by
 420          * remote port and will be retried. On a configuration with
 421          * single discovery thread, this will cause a huge delay in
 422          * discovery. Also this will cause multiple state machines
 423          * running in parallel for this node.
 424          */
 425         if (ndlp->nlp_state == NLP_STE_PLOGI_ISSUE) {
 426                 /* software abort outstanding PLOGI */
 427                 lpfc_els_abort(phba, ndlp);
 428         }
 429
 430         if ((vport->port_type == LPFC_NPIV_PORT &&
 431              vport->cfg_restrict_login)) {
 432
 433                 /* In order to preserve RPIs, we want to cleanup
 434                  * the default RPI the firmware created to rcv
 435                  * this ELS request. The only way to do this is
 436                  * to register, then unregister the RPI.
 437                  */
 438                 spin_lock_irq(shost->host_lock);
 439                 ndlp->nlp_flag |= NLP_RM_DFLT_RPI;
 440                 spin_unlock_irq(shost->host_lock);
 441                 stat.un.b.lsRjtRsnCode = LSRJT_INVALID_CMD;
 442                 stat.un.b.lsRjtRsnCodeExp = LSEXP_NOTHING_MORE;
 443                 rc = lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb,
 444                         ndlp, mbox);
 445                 if (rc)
 446                         mempool_free(mbox, phba->mbox_mem_pool);
 447                 return 1;
 448         }
 449         rc = lpfc_els_rsp_acc(vport, ELS_CMD_PLOGI, cmdiocb, ndlp, mbox);
 450         if (rc)
 451                 mempool_free(mbox, phba->mbox_mem_pool);
 452         return 1;
 453 out:
 454         stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
 455         stat.un.b.lsRjtRsnCodeExp = LSEXP_OUT_OF_RESOURCE;
 456         lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
 457         return 0;
 458 }
 459
 460 /**
 461  * lpfc_mbx_cmpl_resume_rpi - Resume RPI completion routine
 462  * @phba: pointer to lpfc hba data structure.
 463  * @mboxq: pointer to mailbox object
 464  *
 465  * This routine is invoked to issue a completion to a rcv'ed
 466  * ADISC or PDISC after the paused RPI has been resumed.
 467  **/
 468 static void
 469 lpfc_mbx_cmpl_resume_rpi(struct lpfc_hba *phba, LPFC_MBOXQ_t *mboxq)
 470 {
 471         struct lpfc_vport *vport;
 472         struct lpfc_iocbq *elsiocb;
 473         struct lpfc_nodelist *ndlp;
 474         uint32_t cmd;
 475
 476         elsiocb = (struct lpfc_iocbq *)mboxq->context1;
 477         ndlp = (struct lpfc_nodelist *) mboxq->context2;
 478         vport = mboxq->vport;
 479         cmd = elsiocb->drvrTimeout;
 480
 481         if (cmd == ELS_CMD_ADISC) {
 482                 lpfc_els_rsp_adisc_acc(vport, elsiocb, ndlp);
 483         } else {
 484                 lpfc_els_rsp_acc(vport, ELS_CMD_PLOGI, elsiocb,
 485                         ndlp, NULL);
 486         }
 487         kfree(elsiocb);
 488         mempool_free(mboxq, phba->mbox_mem_pool);
 489 }
 490
 491 static int
 492 lpfc_rcv_padisc(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 493                 struct lpfc_iocbq *cmdiocb)
 494 {
 495         struct Scsi_Host   *shost = lpfc_shost_from_vport(vport);
 496         struct lpfc_iocbq  *elsiocb;
 497         struct lpfc_dmabuf *pcmd;
 498         struct serv_parm   *sp;
 499         struct lpfc_name   *pnn, *ppn;
 500         struct ls_rjt stat;
 501         ADISC *ap;
 502         IOCB_t *icmd;
 503         uint32_t *lp;
 504         uint32_t cmd;
 505
 506         pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
 507         lp = (uint32_t *) pcmd->virt;
 508
 509         cmd = *lp++;
 510         if (cmd == ELS_CMD_ADISC) {
 511                 ap = (ADISC *) lp;
 512                 pnn = (struct lpfc_name *) & ap->nodeName;
 513                 ppn = (struct lpfc_name *) & ap->portName;
 514         } else {
 515                 sp = (struct serv_parm *) lp;
 516                 pnn = (struct lpfc_name *) & sp->nodeName;
 517                 ppn = (struct lpfc_name *) & sp->portName;
 518         }
 519
 520         icmd = &cmdiocb->iocb;
 521         if (icmd->ulpStatus == 0 && lpfc_check_adisc(vport, ndlp, pnn, ppn)) {
 522
 523                 /*
 524                  * As soon as  we send ACC, the remote NPort can
 525                  * start sending us data. Thus, for SLI4 we must
 526                  * resume the RPI before the ACC goes out.
 527                  */
 528                 if (vport->phba->sli_rev == LPFC_SLI_REV4) {
 529                         elsiocb = kmalloc(sizeof(struct lpfc_iocbq),
 530                                 GFP_KERNEL);
 531                         if (elsiocb) {
 532
 533                                 /* Save info from cmd IOCB used in rsp */
 534                                 memcpy((uint8_t *)elsiocb, (uint8_t *)cmdiocb,
 535                                         sizeof(struct lpfc_iocbq));
 536
 537                                 /* Save the ELS cmd */
 538                                 elsiocb->drvrTimeout = cmd;
 539
 540                                 lpfc_sli4_resume_rpi(ndlp,
 541                                         lpfc_mbx_cmpl_resume_rpi, elsiocb);
 542                                 goto out;
 543                         }
 544                 }
 545
 546                 if (cmd == ELS_CMD_ADISC) {
 547                         lpfc_els_rsp_adisc_acc(vport, cmdiocb, ndlp);
 548                 } else {
 549                         lpfc_els_rsp_acc(vport, ELS_CMD_PLOGI, cmdiocb,
 550                                 ndlp, NULL);
 551                 }
 552 out:
 553                 /* If we are authenticated, move to the proper state */
 554                 if (ndlp->nlp_type & NLP_FCP_TARGET)
 555                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_MAPPED_NODE);
 556                 else
 557                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
 558
 559                 return 1;
 560         }
 561         /* Reject this request because invalid parameters */
 562         stat.un.b.lsRjtRsvd0 = 0;
 563         stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
 564         stat.un.b.lsRjtRsnCodeExp = LSEXP_SPARM_OPTIONS;
 565         stat.un.b.vendorUnique = 0;
 566         lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
 567
 568         /* 1 sec timeout */
 569         mod_timer(&ndlp->nlp_delayfunc, jiffies + HZ);
 570
 571         spin_lock_irq(shost->host_lock);
 572         ndlp->nlp_flag |= NLP_DELAY_TMO;
 573         spin_unlock_irq(shost->host_lock);
 574         ndlp->nlp_last_elscmd = ELS_CMD_PLOGI;
 575         ndlp->nlp_prev_state = ndlp->nlp_state;
 576         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
 577         return 0;
 578 }
 579
 580 static int
 581 lpfc_rcv_logo(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 582               struct lpfc_iocbq *cmdiocb, uint32_t els_cmd)
 583 {
 584         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
 585         struct lpfc_hba    *phba = vport->phba;
 586         struct lpfc_vport **vports;
 587         int i, active_vlink_present = 0 ;
 588
 589         /* Put ndlp in NPR state with 1 sec timeout for plogi, ACC logo */
 590         /* Only call LOGO ACC for first LOGO, this avoids sending unnecessary
 591          * PLOGIs during LOGO storms from a device.
 592          */
 593         spin_lock_irq(shost->host_lock);
 594         ndlp->nlp_flag |= NLP_LOGO_ACC;
 595         spin_unlock_irq(shost->host_lock);
 596         if (els_cmd == ELS_CMD_PRLO)
 597                 lpfc_els_rsp_acc(vport, ELS_CMD_PRLO, cmdiocb, ndlp, NULL);
 598         else
 599                 lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
 600         if (ndlp->nlp_DID == Fabric_DID) {
 601                 if (vport->port_state <= LPFC_FDISC)
 602                         goto out;
 603                 lpfc_linkdown_port(vport);
 604                 spin_lock_irq(shost->host_lock);
 605                 vport->fc_flag |= FC_VPORT_LOGO_RCVD;
 606                 spin_unlock_irq(shost->host_lock);
 607                 vports = lpfc_create_vport_work_array(phba);
 608                 if (vports) {
 609                         for (i = 0; i <= phba->max_vports && vports[i] != NULL;
 610                                         i++) {
 611                                 if ((!(vports[i]->fc_flag &
 612                                         FC_VPORT_LOGO_RCVD)) &&
 613                                         (vports[i]->port_state > LPFC_FDISC)) {
 614                                         active_vlink_present = 1;
 615                                         break;
 616                                 }
 617                         }
 618                         lpfc_destroy_vport_work_array(phba, vports);
 619                 }
 620
 621                 if (active_vlink_present) {
 622                         /*
 623                          * If there are other active VLinks present,
 624                          * re-instantiate the Vlink using FDISC.
 625                          */
 626                         mod_timer(&ndlp->nlp_delayfunc, jiffies + HZ);
 627                         spin_lock_irq(shost->host_lock);
 628                         ndlp->nlp_flag |= NLP_DELAY_TMO;
 629                         spin_unlock_irq(shost->host_lock);
 630                         ndlp->nlp_last_elscmd = ELS_CMD_FDISC;
 631                         vport->port_state = LPFC_FDISC;
 632                 } else {
 633                         spin_lock_irq(shost->host_lock);
 634                         phba->pport->fc_flag &= ~FC_LOGO_RCVD_DID_CHNG;
 635                         spin_unlock_irq(shost->host_lock);
 636                         lpfc_retry_pport_discovery(phba);
 637                 }
 638         } else if ((!(ndlp->nlp_type & NLP_FABRIC) &&
 639                 ((ndlp->nlp_type & NLP_FCP_TARGET) ||
 640                 !(ndlp->nlp_type & NLP_FCP_INITIATOR))) ||
 641                 (ndlp->nlp_state == NLP_STE_ADISC_ISSUE)) {
 642                 /* Only try to re-login if this is NOT a Fabric Node */
 643                 mod_timer(&ndlp->nlp_delayfunc, jiffies + HZ * 1);
 644                 spin_lock_irq(shost->host_lock);
 645                 ndlp->nlp_flag |= NLP_DELAY_TMO;
 646                 spin_unlock_irq(shost->host_lock);
 647
 648                 ndlp->nlp_last_elscmd = ELS_CMD_PLOGI;
 649         }
 650 out:
 651         ndlp->nlp_prev_state = ndlp->nlp_state;
 652         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
 653
 654         spin_lock_irq(shost->host_lock);
 655         ndlp->nlp_flag &= ~NLP_NPR_ADISC;
 656         spin_unlock_irq(shost->host_lock);
 657         /* The driver has to wait until the ACC completes before it continues
 658          * processing the LOGO.  The action will resume in
 659          * lpfc_cmpl_els_logo_acc routine. Since part of processing includes an
 660          * unreg_login, the driver waits so the ACC does not get aborted.
 661          */
 662         return 0;
 663 }
 664
 665 static void
 666 lpfc_rcv_prli(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 667               struct lpfc_iocbq *cmdiocb)
 668 {
 669         struct lpfc_dmabuf *pcmd;
 670         uint32_t *lp;
 671         PRLI *npr;
 672         struct fc_rport *rport = ndlp->rport;
 673         u32 roles;
 674
 675         pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
 676         lp = (uint32_t *) pcmd->virt;
 677         npr = (PRLI *) ((uint8_t *) lp + sizeof (uint32_t));
 678
 679         ndlp->nlp_type &= ~(NLP_FCP_TARGET | NLP_FCP_INITIATOR);
 680         ndlp->nlp_fcp_info &= ~NLP_FCP_2_DEVICE;
 681         if (npr->prliType == PRLI_FCP_TYPE) {
 682                 if (npr->initiatorFunc)
 683                         ndlp->nlp_type |= NLP_FCP_INITIATOR;
 684                 if (npr->targetFunc)
 685                         ndlp->nlp_type |= NLP_FCP_TARGET;
 686                 if (npr->Retry)
 687                         ndlp->nlp_fcp_info |= NLP_FCP_2_DEVICE;
 688         }
 689         if (rport) {
 690                 /* We need to update the rport role values */
 691                 roles = FC_RPORT_ROLE_UNKNOWN;
 692                 if (ndlp->nlp_type & NLP_FCP_INITIATOR)
 693                         roles |= FC_RPORT_ROLE_FCP_INITIATOR;
 694                 if (ndlp->nlp_type & NLP_FCP_TARGET)
 695                         roles |= FC_RPORT_ROLE_FCP_TARGET;
 696
 697                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_RPORT,
 698                         "rport rolechg:   role:x%x did:x%x flg:x%x",
 699                         roles, ndlp->nlp_DID, ndlp->nlp_flag);
 700
 701                 fc_remote_port_rolechg(rport, roles);
 702         }
 703 }
 704
 705 static uint32_t
 706 lpfc_disc_set_adisc(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
 707 {
 708         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
 709
 710         if (!(ndlp->nlp_flag & NLP_RPI_REGISTERED)) {
 711                 ndlp->nlp_flag &= ~NLP_NPR_ADISC;
 712                 return 0;
 713         }
 714
 715         if (!(vport->fc_flag & FC_PT2PT)) {
 716                 /* Check config parameter use-adisc or FCP-2 */
 717                 if ((vport->cfg_use_adisc && (vport->fc_flag & FC_RSCN_MODE)) ||
 718                     ((ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) &&
 719                      (ndlp->nlp_type & NLP_FCP_TARGET))) {
 720                         spin_lock_irq(shost->host_lock);
 721                         ndlp->nlp_flag |= NLP_NPR_ADISC;
 722                         spin_unlock_irq(shost->host_lock);
 723                         return 1;
 724                 }
 725         }
 726         ndlp->nlp_flag &= ~NLP_NPR_ADISC;
 727         lpfc_unreg_rpi(vport, ndlp);
 728         return 0;
 729 }
 730
 731 /**
 732  * lpfc_release_rpi - Release a RPI by issuing unreg_login mailbox cmd.
 733  * @phba : Pointer to lpfc_hba structure.
 734  * @vport: Pointer to lpfc_vport structure.
 735  * @rpi  : rpi to be release.
 736  *
 737  * This function will send a unreg_login mailbox command to the firmware
 738  * to release a rpi.
 739  **/
 740 void
 741 lpfc_release_rpi(struct lpfc_hba *phba,
 742                 struct lpfc_vport *vport,
 743                 uint16_t rpi)
 744 {
 745         LPFC_MBOXQ_t *pmb;
 746         int rc;
 747
 748         pmb = (LPFC_MBOXQ_t *) mempool_alloc(phba->mbox_mem_pool,
 749                         GFP_KERNEL);
 750         if (!pmb)
 751                 lpfc_printf_vlog(vport, KERN_ERR, LOG_MBOX,
 752                         "2796 mailbox memory allocation failed \n");
 753         else {
 754                 lpfc_unreg_login(phba, vport->vpi, rpi, pmb);
 755                 pmb->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
 756                 rc = lpfc_sli_issue_mbox(phba, pmb, MBX_NOWAIT);
 757                 if (rc == MBX_NOT_FINISHED)
 758                         mempool_free(pmb, phba->mbox_mem_pool);
 759         }
 760 }
 761
 762 static uint32_t
 763 lpfc_disc_illegal(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 764                   void *arg, uint32_t evt)
 765 {
 766         struct lpfc_hba *phba;
 767         LPFC_MBOXQ_t *pmb = (LPFC_MBOXQ_t *) arg;
 768         MAILBOX_t *mb;
 769         uint16_t rpi;
 770
 771         phba = vport->phba;
 772         /* Release the RPI if reglogin completing */
 773         if (!(phba->pport->load_flag & FC_UNLOADING) &&
 774                 (evt == NLP_EVT_CMPL_REG_LOGIN) &&
 775                 (!pmb->u.mb.mbxStatus)) {
 776                 mb = &pmb->u.mb;
 777                 rpi = pmb->u.mb.un.varWords[0];
 778                 lpfc_release_rpi(phba, vport, rpi);
 779         }
 780         lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
 781                          "0271 Illegal State Transition: node x%x "
 782                          "event x%x, state x%x Data: x%x x%x\n",
 783                          ndlp->nlp_DID, evt, ndlp->nlp_state, ndlp->nlp_rpi,
 784                          ndlp->nlp_flag);
 785         return ndlp->nlp_state;
 786 }
 787
 788 static uint32_t
 789 lpfc_cmpl_plogi_illegal(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 790                   void *arg, uint32_t evt)
 791 {
 792         /* This transition is only legal if we previously
 793          * rcv'ed a PLOGI. Since we don't want 2 discovery threads
 794          * working on the same NPortID, do nothing for this thread
 795          * to stop it.
 796          */
 797         if (!(ndlp->nlp_flag & NLP_RCV_PLOGI)) {
 798                 lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
 799                          "0272 Illegal State Transition: node x%x "
 800                          "event x%x, state x%x Data: x%x x%x\n",
 801                          ndlp->nlp_DID, evt, ndlp->nlp_state, ndlp->nlp_rpi,
 802                          ndlp->nlp_flag);
 803         }
 804         return ndlp->nlp_state;
 805 }
 806
 807 /* Start of Discovery State Machine routines */
 808
 809 static uint32_t
 810 lpfc_rcv_plogi_unused_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 811                            void *arg, uint32_t evt)
 812 {
 813         struct lpfc_iocbq *cmdiocb;
 814
 815         cmdiocb = (struct lpfc_iocbq *) arg;
 816
 817         if (lpfc_rcv_plogi(vport, ndlp, cmdiocb)) {
 818                 return ndlp->nlp_state;
 819         }
 820         return NLP_STE_FREED_NODE;
 821 }
 822
 823 static uint32_t
 824 lpfc_rcv_els_unused_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 825                          void *arg, uint32_t evt)
 826 {
 827         lpfc_issue_els_logo(vport, ndlp, 0);
 828         return ndlp->nlp_state;
 829 }
 830
 831 static uint32_t
 832 lpfc_rcv_logo_unused_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 833                           void *arg, uint32_t evt)
 834 {
 835         struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
 836         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
 837
 838         spin_lock_irq(shost->host_lock);
 839         ndlp->nlp_flag |= NLP_LOGO_ACC;
 840         spin_unlock_irq(shost->host_lock);
 841         lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
 842
 843         return ndlp->nlp_state;
 844 }
 845
 846 static uint32_t
 847 lpfc_cmpl_logo_unused_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 848                            void *arg, uint32_t evt)
 849 {
 850         return NLP_STE_FREED_NODE;
 851 }
 852
 853 static uint32_t
 854 lpfc_device_rm_unused_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 855                            void *arg, uint32_t evt)
 856 {
 857         return NLP_STE_FREED_NODE;
 858 }
 859
 860 static uint32_t
 861 lpfc_device_recov_unused_node(struct lpfc_vport *vport,
 862                         struct lpfc_nodelist *ndlp,
 863                            void *arg, uint32_t evt)
 864 {
 865         return ndlp->nlp_state;
 866 }
 867
 868 static uint32_t
 869 lpfc_rcv_plogi_plogi_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 870                            void *arg, uint32_t evt)
 871 {
 872         struct Scsi_Host   *shost = lpfc_shost_from_vport(vport);
 873         struct lpfc_hba   *phba = vport->phba;
 874         struct lpfc_iocbq *cmdiocb = arg;
 875         struct lpfc_dmabuf *pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
 876         uint32_t *lp = (uint32_t *) pcmd->virt;
 877         struct serv_parm *sp = (struct serv_parm *) (lp + 1);
 878         struct ls_rjt stat;
 879         int port_cmp;
 880
 881         memset(&stat, 0, sizeof (struct ls_rjt));
 882
 883         /* For a PLOGI, we only accept if our portname is less
 884          * than the remote portname.
 885          */
 886         phba->fc_stat.elsLogiCol++;
 887         port_cmp = memcmp(&vport->fc_portname, &sp->portName,
 888                           sizeof(struct lpfc_name));
 889
 890         if (port_cmp >= 0) {
 891                 /* Reject this request because the remote node will accept
 892                    ours */
 893                 stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
 894                 stat.un.b.lsRjtRsnCodeExp = LSEXP_CMD_IN_PROGRESS;
 895                 lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp,
 896                         NULL);
 897         } else {
 898                 if (lpfc_rcv_plogi(vport, ndlp, cmdiocb) &&
 899                     (ndlp->nlp_flag & NLP_NPR_2B_DISC) &&
 900                     (vport->num_disc_nodes)) {
 901                         spin_lock_irq(shost->host_lock);
 902                         ndlp->nlp_flag &= ~NLP_NPR_2B_DISC;
 903                         spin_unlock_irq(shost->host_lock);
 904                         /* Check if there are more PLOGIs to be sent */
 905                         lpfc_more_plogi(vport);
 906                         if (vport->num_disc_nodes == 0) {
 907                                 spin_lock_irq(shost->host_lock);
 908                                 vport->fc_flag &= ~FC_NDISC_ACTIVE;
 909                                 spin_unlock_irq(shost->host_lock);
 910                                 lpfc_can_disctmo(vport);
 911                                 lpfc_end_rscn(vport);
 912                         }
 913                 }
 914         } /* If our portname was less */
 915
 916         return ndlp->nlp_state;
 917 }
 918
 919 static uint32_t
 920 lpfc_rcv_prli_plogi_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 921                           void *arg, uint32_t evt)
 922 {
 923         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
 924         struct ls_rjt     stat;
 925
 926         memset(&stat, 0, sizeof (struct ls_rjt));
 927         stat.un.b.lsRjtRsnCode = LSRJT_LOGICAL_BSY;
 928         stat.un.b.lsRjtRsnCodeExp = LSEXP_NOTHING_MORE;
 929         lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
 930         return ndlp->nlp_state;
 931 }
 932
 933 static uint32_t
 934 lpfc_rcv_logo_plogi_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 935                           void *arg, uint32_t evt)
 936 {
 937         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
 938
 939                                 /* software abort outstanding PLOGI */
 940         lpfc_els_abort(vport->phba, ndlp);
 941
 942         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_LOGO);
 943         return ndlp->nlp_state;
 944 }
 945
 946 static uint32_t
 947 lpfc_rcv_els_plogi_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 948                          void *arg, uint32_t evt)
 949 {
 950         struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
 951         struct lpfc_hba   *phba = vport->phba;
 952         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
 953
 954         /* software abort outstanding PLOGI */
 955         lpfc_els_abort(phba, ndlp);
 956
 957         if (evt == NLP_EVT_RCV_LOGO) {
 958                 lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
 959         } else {
 960                 lpfc_issue_els_logo(vport, ndlp, 0);
 961         }
 962
 963         /* Put ndlp in npr state set plogi timer for 1 sec */
 964         mod_timer(&ndlp->nlp_delayfunc, jiffies + HZ * 1);
 965         spin_lock_irq(shost->host_lock);
 966         ndlp->nlp_flag |= NLP_DELAY_TMO;
 967         spin_unlock_irq(shost->host_lock);
 968         ndlp->nlp_last_elscmd = ELS_CMD_PLOGI;
 969         ndlp->nlp_prev_state = NLP_STE_PLOGI_ISSUE;
 970         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
 971
 972         return ndlp->nlp_state;
 973 }
 974
 975 static uint32_t
 976 lpfc_cmpl_plogi_plogi_issue(struct lpfc_vport *vport,
 977                             struct lpfc_nodelist *ndlp,
 978                             void *arg,
 979                             uint32_t evt)
 980 {
 981         struct lpfc_hba    *phba = vport->phba;
 982         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
 983         struct lpfc_iocbq  *cmdiocb, *rspiocb;
 984         struct lpfc_dmabuf *pcmd, *prsp, *mp;
 985         uint32_t *lp;
 986         IOCB_t *irsp;
 987         struct serv_parm *sp;
 988         LPFC_MBOXQ_t *mbox;
 989
 990         cmdiocb = (struct lpfc_iocbq *) arg;
 991         rspiocb = cmdiocb->context_un.rsp_iocb;
 992
 993         if (ndlp->nlp_flag & NLP_ACC_REGLOGIN) {
 994                 /* Recovery from PLOGI collision logic */
 995                 return ndlp->nlp_state;
 996         }
 997
 998         irsp = &rspiocb->iocb;
 999
1000         if (irsp->ulpStatus)
1001                 goto out;
1002
1003         pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
1004
1005         prsp = list_get_first(&pcmd->list, struct lpfc_dmabuf, list);
1006
1007         lp = (uint32_t *) prsp->virt;
1008         sp = (struct serv_parm *) ((uint8_t *) lp + sizeof (uint32_t));
1009
1010         /* Some switches have FDMI servers returning 0 for WWN */
1011         if ((ndlp->nlp_DID != FDMI_DID) &&
1012                 (wwn_to_u64(sp->portName.u.wwn) == 0 ||
1013                 wwn_to_u64(sp->nodeName.u.wwn) == 0)) {
1014                 lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
1015                                  "0142 PLOGI RSP: Invalid WWN.\n");
1016                 goto out;
1017         }
1018         if (!lpfc_check_sparm(vport, ndlp, sp, CLASS3, 0))
1019                 goto out;
1020         /* PLOGI chkparm OK */
1021         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
1022                          "0121 PLOGI chkparm OK Data: x%x x%x x%x x%x\n",
1023                          ndlp->nlp_DID, ndlp->nlp_state,
1024                          ndlp->nlp_flag, ndlp->nlp_rpi);
1025         if (vport->cfg_fcp_class == 2 && (sp->cls2.classValid))
1026                 ndlp->nlp_fcp_info |= CLASS2;
1027         else
1028                 ndlp->nlp_fcp_info |= CLASS3;
1029
1030         ndlp->nlp_class_sup = 0;
1031         if (sp->cls1.classValid)
1032                 ndlp->nlp_class_sup |= FC_COS_CLASS1;
1033         if (sp->cls2.classValid)
1034                 ndlp->nlp_class_sup |= FC_COS_CLASS2;
1035         if (sp->cls3.classValid)
1036                 ndlp->nlp_class_sup |= FC_COS_CLASS3;
1037         if (sp->cls4.classValid)
1038                 ndlp->nlp_class_sup |= FC_COS_CLASS4;
1039         ndlp->nlp_maxframe =
1040                 ((sp->cmn.bbRcvSizeMsb & 0x0F) << 8) | sp->cmn.bbRcvSizeLsb;
1041
1042         mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
1043         if (!mbox) {
1044                 lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
1045                         "0133 PLOGI: no memory for reg_login "
1046                         "Data: x%x x%x x%x x%x\n",
1047                         ndlp->nlp_DID, ndlp->nlp_state,
1048                         ndlp->nlp_flag, ndlp->nlp_rpi);
1049                 goto out;
1050         }
1051
1052         lpfc_unreg_rpi(vport, ndlp);
1053
1054         if (lpfc_reg_rpi(phba, vport->vpi, irsp->un.elsreq64.remoteID,
1055                          (uint8_t *) sp, mbox, ndlp->nlp_rpi) == 0) {
1056                 switch (ndlp->nlp_DID) {
1057                 case NameServer_DID:
1058                         mbox->mbox_cmpl = lpfc_mbx_cmpl_ns_reg_login;
1059                         break;
1060                 case FDMI_DID:
1061                         mbox->mbox_cmpl = lpfc_mbx_cmpl_fdmi_reg_login;
1062                         break;
1063                 default:
1064                         ndlp->nlp_flag |= NLP_REG_LOGIN_SEND;
1065                         mbox->mbox_cmpl = lpfc_mbx_cmpl_reg_login;
1066                 }
1067                 mbox->context2 = lpfc_nlp_get(ndlp);
1068                 mbox->vport = vport;
1069                 if (lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT)
1070                     != MBX_NOT_FINISHED) {
1071                         lpfc_nlp_set_state(vport, ndlp,
1072                                            NLP_STE_REG_LOGIN_ISSUE);
1073                         return ndlp->nlp_state;
1074                 }
1075                 if (ndlp->nlp_flag & NLP_REG_LOGIN_SEND)
1076                         ndlp->nlp_flag &= ~NLP_REG_LOGIN_SEND;
1077                 /* decrement node reference count to the failed mbox
1078                  * command
1079                  */
1080                 lpfc_nlp_put(ndlp);
1081                 mp = (struct lpfc_dmabuf *) mbox->context1;
1082                 lpfc_mbuf_free(phba, mp->virt, mp->phys);
1083                 kfree(mp);
1084                 mempool_free(mbox, phba->mbox_mem_pool);
1085
1086                 lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
1087                                  "0134 PLOGI: cannot issue reg_login "
1088                                  "Data: x%x x%x x%x x%x\n",
1089                                  ndlp->nlp_DID, ndlp->nlp_state,
1090                                  ndlp->nlp_flag, ndlp->nlp_rpi);
1091         } else {
1092                 mempool_free(mbox, phba->mbox_mem_pool);
1093
1094                 lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
1095                                  "0135 PLOGI: cannot format reg_login "
1096                                  "Data: x%x x%x x%x x%x\n",
1097                                  ndlp->nlp_DID, ndlp->nlp_state,
1098                                  ndlp->nlp_flag, ndlp->nlp_rpi);
1099         }
1100
1101
1102 out:
1103         if (ndlp->nlp_DID == NameServer_DID) {
1104                 lpfc_vport_set_state(vport, FC_VPORT_FAILED);
1105                 lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
1106                                  "0261 Cannot Register NameServer login\n");
1107         }
1108
1109         spin_lock_irq(shost->host_lock);
1110         ndlp->nlp_flag |= NLP_DEFER_RM;
1111         spin_unlock_irq(shost->host_lock);
1112         return NLP_STE_FREED_NODE;
1113 }
1114
1115 static uint32_t
1116 lpfc_cmpl_logo_plogi_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1117                            void *arg, uint32_t evt)
1118 {
1119         return ndlp->nlp_state;
1120 }
1121
1122 static uint32_t
1123 lpfc_cmpl_reglogin_plogi_issue(struct lpfc_vport *vport,
1124         struct lpfc_nodelist *ndlp, void *arg, uint32_t evt)
1125 {
1126         struct lpfc_hba *phba;
1127         LPFC_MBOXQ_t *pmb = (LPFC_MBOXQ_t *) arg;
1128         MAILBOX_t *mb = &pmb->u.mb;
1129         uint16_t rpi;
1130
1131         phba = vport->phba;
1132         /* Release the RPI */
1133         if (!(phba->pport->load_flag & FC_UNLOADING) &&
1134                 !mb->mbxStatus) {
1135                 rpi = pmb->u.mb.un.varWords[0];
1136                 lpfc_release_rpi(phba, vport, rpi);
1137         }
1138         return ndlp->nlp_state;
1139 }
1140
1141 static uint32_t
1142 lpfc_device_rm_plogi_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1143                            void *arg, uint32_t evt)
1144 {
1145         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1146
1147         if (ndlp->nlp_flag & NLP_NPR_2B_DISC) {
1148                 spin_lock_irq(shost->host_lock);
1149                 ndlp->nlp_flag |= NLP_NODEV_REMOVE;
1150                 spin_unlock_irq(shost->host_lock);
1151                 return ndlp->nlp_state;
1152         } else {
1153                 /* software abort outstanding PLOGI */
1154                 lpfc_els_abort(vport->phba, ndlp);
1155
1156                 lpfc_drop_node(vport, ndlp);
1157                 return NLP_STE_FREED_NODE;
1158         }
1159 }
1160
1161 static uint32_t
1162 lpfc_device_recov_plogi_issue(struct lpfc_vport *vport,
1163                               struct lpfc_nodelist *ndlp,
1164                               void *arg,
1165                               uint32_t evt)
1166 {
1167         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1168         struct lpfc_hba  *phba = vport->phba;
1169
1170         /* Don't do anything that will mess up processing of the
1171          * previous RSCN.
1172          */
1173         if (vport->fc_flag & FC_RSCN_DEFERRED)
1174                 return ndlp->nlp_state;
1175
1176         /* software abort outstanding PLOGI */
1177         lpfc_els_abort(phba, ndlp);
1178
1179         ndlp->nlp_prev_state = NLP_STE_PLOGI_ISSUE;
1180         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1181         spin_lock_irq(shost->host_lock);
1182         ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
1183         spin_unlock_irq(shost->host_lock);
1184
1185         return ndlp->nlp_state;
1186 }
1187
1188 static uint32_t
1189 lpfc_rcv_plogi_adisc_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1190                            void *arg, uint32_t evt)
1191 {
1192         struct Scsi_Host   *shost = lpfc_shost_from_vport(vport);
1193         struct lpfc_hba   *phba = vport->phba;
1194         struct lpfc_iocbq *cmdiocb;
1195
1196         /* software abort outstanding ADISC */
1197         lpfc_els_abort(phba, ndlp);
1198
1199         cmdiocb = (struct lpfc_iocbq *) arg;
1200
1201         if (lpfc_rcv_plogi(vport, ndlp, cmdiocb)) {
1202                 if (ndlp->nlp_flag & NLP_NPR_2B_DISC) {
1203                         spin_lock_irq(shost->host_lock);
1204                         ndlp->nlp_flag &= ~NLP_NPR_2B_DISC;
1205                         spin_unlock_irq(shost->host_lock);
1206                         if (vport->num_disc_nodes)
1207                                 lpfc_more_adisc(vport);
1208                 }
1209                 return ndlp->nlp_state;
1210         }
1211         ndlp->nlp_prev_state = NLP_STE_ADISC_ISSUE;
1212         lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0);
1213         lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
1214
1215         return ndlp->nlp_state;
1216 }
1217
1218 static uint32_t
1219 lpfc_rcv_prli_adisc_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1220                           void *arg, uint32_t evt)
1221 {
1222         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1223
1224         lpfc_els_rsp_prli_acc(vport, cmdiocb, ndlp);
1225         return ndlp->nlp_state;
1226 }
1227
1228 static uint32_t
1229 lpfc_rcv_logo_adisc_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1230                           void *arg, uint32_t evt)
1231 {
1232         struct lpfc_hba *phba = vport->phba;
1233         struct lpfc_iocbq *cmdiocb;
1234
1235         cmdiocb = (struct lpfc_iocbq *) arg;
1236
1237         /* software abort outstanding ADISC */
1238         lpfc_els_abort(phba, ndlp);
1239
1240         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_LOGO);
1241         return ndlp->nlp_state;
1242 }
1243
1244 static uint32_t
1245 lpfc_rcv_padisc_adisc_issue(struct lpfc_vport *vport,
1246                             struct lpfc_nodelist *ndlp,
1247                             void *arg, uint32_t evt)
1248 {
1249         struct lpfc_iocbq *cmdiocb;
1250
1251         cmdiocb = (struct lpfc_iocbq *) arg;
1252
1253         lpfc_rcv_padisc(vport, ndlp, cmdiocb);
1254         return ndlp->nlp_state;
1255 }
1256
1257 static uint32_t
1258 lpfc_rcv_prlo_adisc_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1259                           void *arg, uint32_t evt)
1260 {
1261         struct lpfc_iocbq *cmdiocb;
1262
1263         cmdiocb = (struct lpfc_iocbq *) arg;
1264
1265         /* Treat like rcv logo */
1266         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_PRLO);
1267         return ndlp->nlp_state;
1268 }
1269
1270 static uint32_t
1271 lpfc_cmpl_adisc_adisc_issue(struct lpfc_vport *vport,
1272                             struct lpfc_nodelist *ndlp,
1273                             void *arg, uint32_t evt)
1274 {
1275         struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
1276         struct lpfc_hba   *phba = vport->phba;
1277         struct lpfc_iocbq *cmdiocb, *rspiocb;
1278         IOCB_t *irsp;
1279         ADISC *ap;
1280         int rc;
1281
1282         cmdiocb = (struct lpfc_iocbq *) arg;
1283         rspiocb = cmdiocb->context_un.rsp_iocb;
1284
1285         ap = (ADISC *)lpfc_check_elscmpl_iocb(phba, cmdiocb, rspiocb);
1286         irsp = &rspiocb->iocb;
1287
1288         if ((irsp->ulpStatus) ||
1289             (!lpfc_check_adisc(vport, ndlp, &ap->nodeName, &ap->portName))) {
1290                 /* 1 sec timeout */
1291                 mod_timer(&ndlp->nlp_delayfunc, jiffies + HZ);
1292                 spin_lock_irq(shost->host_lock);
1293                 ndlp->nlp_flag |= NLP_DELAY_TMO;
1294                 spin_unlock_irq(shost->host_lock);
1295                 ndlp->nlp_last_elscmd = ELS_CMD_PLOGI;
1296
1297                 memset(&ndlp->nlp_nodename, 0, sizeof(struct lpfc_name));
1298                 memset(&ndlp->nlp_portname, 0, sizeof(struct lpfc_name));
1299
1300                 ndlp->nlp_prev_state = NLP_STE_ADISC_ISSUE;
1301                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1302                 lpfc_unreg_rpi(vport, ndlp);
1303                 return ndlp->nlp_state;
1304         }
1305
1306         if (phba->sli_rev == LPFC_SLI_REV4) {
1307                 rc = lpfc_sli4_resume_rpi(ndlp, NULL, NULL);
1308                 if (rc) {
1309                         /* Stay in state and retry. */
1310                         ndlp->nlp_prev_state = NLP_STE_ADISC_ISSUE;
1311                         return ndlp->nlp_state;
1312                 }
1313         }
1314
1315         if (ndlp->nlp_type & NLP_FCP_TARGET) {
1316                 ndlp->nlp_prev_state = NLP_STE_ADISC_ISSUE;
1317                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_MAPPED_NODE);
1318         } else {
1319                 ndlp->nlp_prev_state = NLP_STE_ADISC_ISSUE;
1320                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
1321         }
1322
1323         return ndlp->nlp_state;
1324 }
1325
1326 static uint32_t
1327 lpfc_device_rm_adisc_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1328                            void *arg, uint32_t evt)
1329 {
1330         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1331
1332         if (ndlp->nlp_flag & NLP_NPR_2B_DISC) {
1333                 spin_lock_irq(shost->host_lock);
1334                 ndlp->nlp_flag |= NLP_NODEV_REMOVE;
1335                 spin_unlock_irq(shost->host_lock);
1336                 return ndlp->nlp_state;
1337         } else {
1338                 /* software abort outstanding ADISC */
1339                 lpfc_els_abort(vport->phba, ndlp);
1340
1341                 lpfc_drop_node(vport, ndlp);
1342                 return NLP_STE_FREED_NODE;
1343         }
1344 }
1345
1346 static uint32_t
1347 lpfc_device_recov_adisc_issue(struct lpfc_vport *vport,
1348                               struct lpfc_nodelist *ndlp,
1349                               void *arg,
1350                               uint32_t evt)
1351 {
1352         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1353         struct lpfc_hba  *phba = vport->phba;
1354
1355         /* Don't do anything that will mess up processing of the
1356          * previous RSCN.
1357          */
1358         if (vport->fc_flag & FC_RSCN_DEFERRED)
1359                 return ndlp->nlp_state;
1360
1361         /* software abort outstanding ADISC */
1362         lpfc_els_abort(phba, ndlp);
1363
1364         ndlp->nlp_prev_state = NLP_STE_ADISC_ISSUE;
1365         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1366         spin_lock_irq(shost->host_lock);
1367         ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
1368         spin_unlock_irq(shost->host_lock);
1369         lpfc_disc_set_adisc(vport, ndlp);
1370         return ndlp->nlp_state;
1371 }
1372
1373 static uint32_t
1374 lpfc_rcv_plogi_reglogin_issue(struct lpfc_vport *vport,
1375                               struct lpfc_nodelist *ndlp,
1376                               void *arg,
1377                               uint32_t evt)
1378 {
1379         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1380
1381         lpfc_rcv_plogi(vport, ndlp, cmdiocb);
1382         return ndlp->nlp_state;
1383 }
1384
1385 static uint32_t
1386 lpfc_rcv_prli_reglogin_issue(struct lpfc_vport *vport,
1387                              struct lpfc_nodelist *ndlp,
1388                              void *arg,
1389                              uint32_t evt)
1390 {
1391         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1392
1393         lpfc_els_rsp_prli_acc(vport, cmdiocb, ndlp);
1394         return ndlp->nlp_state;
1395 }
1396
1397 static uint32_t
1398 lpfc_rcv_logo_reglogin_issue(struct lpfc_vport *vport,
1399                              struct lpfc_nodelist *ndlp,
1400                              void *arg,
1401                              uint32_t evt)
1402 {
1403         struct lpfc_hba   *phba = vport->phba;
1404         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1405         LPFC_MBOXQ_t      *mb;
1406         LPFC_MBOXQ_t      *nextmb;
1407         struct lpfc_dmabuf *mp;
1408
1409         cmdiocb = (struct lpfc_iocbq *) arg;
1410
1411         /* cleanup any ndlp on mbox q waiting for reglogin cmpl */
1412         if ((mb = phba->sli.mbox_active)) {
1413                 if ((mb->u.mb.mbxCommand == MBX_REG_LOGIN64) &&
1414                    (ndlp == (struct lpfc_nodelist *) mb->context2)) {
1415                         lpfc_nlp_put(ndlp);
1416                         mb->context2 = NULL;
1417                         mb->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
1418                 }
1419         }
1420
1421         spin_lock_irq(&phba->hbalock);
1422         list_for_each_entry_safe(mb, nextmb, &phba->sli.mboxq, list) {
1423                 if ((mb->u.mb.mbxCommand == MBX_REG_LOGIN64) &&
1424                    (ndlp == (struct lpfc_nodelist *) mb->context2)) {
1425                         mp = (struct lpfc_dmabuf *) (mb->context1);
1426                         if (mp) {
1427                                 __lpfc_mbuf_free(phba, mp->virt, mp->phys);
1428                                 kfree(mp);
1429                         }
1430                         lpfc_nlp_put(ndlp);
1431                         list_del(&mb->list);
1432                         phba->sli.mboxq_cnt--;
1433                         mempool_free(mb, phba->mbox_mem_pool);
1434                 }
1435         }
1436         spin_unlock_irq(&phba->hbalock);
1437
1438         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_LOGO);
1439         return ndlp->nlp_state;
1440 }
1441
1442 static uint32_t
1443 lpfc_rcv_padisc_reglogin_issue(struct lpfc_vport *vport,
1444                                struct lpfc_nodelist *ndlp,
1445                                void *arg,
1446                                uint32_t evt)
1447 {
1448         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1449
1450         lpfc_rcv_padisc(vport, ndlp, cmdiocb);
1451         return ndlp->nlp_state;
1452 }
1453
1454 static uint32_t
1455 lpfc_rcv_prlo_reglogin_issue(struct lpfc_vport *vport,
1456                              struct lpfc_nodelist *ndlp,
1457                              void *arg,
1458                              uint32_t evt)
1459 {
1460         struct lpfc_iocbq *cmdiocb;
1461
1462         cmdiocb = (struct lpfc_iocbq *) arg;
1463         lpfc_els_rsp_acc(vport, ELS_CMD_PRLO, cmdiocb, ndlp, NULL);
1464         return ndlp->nlp_state;
1465 }
1466
1467 static uint32_t
1468 lpfc_cmpl_reglogin_reglogin_issue(struct lpfc_vport *vport,
1469                                   struct lpfc_nodelist *ndlp,
1470                                   void *arg,
1471                                   uint32_t evt)
1472 {
1473         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1474         LPFC_MBOXQ_t *pmb = (LPFC_MBOXQ_t *) arg;
1475         MAILBOX_t *mb = &pmb->u.mb;
1476         uint32_t did  = mb->un.varWords[1];
1477
1478         if (mb->mbxStatus) {
1479                 /* RegLogin failed */
1480                 lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
1481                                 "0246 RegLogin failed Data: x%x x%x x%x x%x "
1482                                  "x%x\n",
1483                                  did, mb->mbxStatus, vport->port_state,
1484                                  mb->un.varRegLogin.vpi,
1485                                  mb->un.varRegLogin.rpi);
1486                 /*
1487                  * If RegLogin failed due to lack of HBA resources do not
1488                  * retry discovery.
1489                  */
1490                 if (mb->mbxStatus == MBXERR_RPI_FULL) {
1491                         ndlp->nlp_prev_state = NLP_STE_REG_LOGIN_ISSUE;
1492                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1493                         return ndlp->nlp_state;
1494                 }
1495
1496                 /* Put ndlp in npr state set plogi timer for 1 sec */
1497                 mod_timer(&ndlp->nlp_delayfunc, jiffies + HZ * 1);
1498                 spin_lock_irq(shost->host_lock);
1499                 ndlp->nlp_flag |= NLP_DELAY_TMO;
1500                 spin_unlock_irq(shost->host_lock);
1501                 ndlp->nlp_last_elscmd = ELS_CMD_PLOGI;
1502
1503                 lpfc_issue_els_logo(vport, ndlp, 0);
1504                 ndlp->nlp_prev_state = NLP_STE_REG_LOGIN_ISSUE;
1505                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1506                 return ndlp->nlp_state;
1507         }
1508
1509         /* SLI4 ports have preallocated logical rpis. */
1510         if (vport->phba->sli_rev < LPFC_SLI_REV4)
1511                 ndlp->nlp_rpi = mb->un.varWords[0];
1512
1513         ndlp->nlp_flag |= NLP_RPI_REGISTERED;
1514
1515         /* Only if we are not a fabric nport do we issue PRLI */
1516         if (!(ndlp->nlp_type & NLP_FABRIC)) {
1517                 ndlp->nlp_prev_state = NLP_STE_REG_LOGIN_ISSUE;
1518                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_PRLI_ISSUE);
1519                 lpfc_issue_els_prli(vport, ndlp, 0);
1520         } else {
1521                 ndlp->nlp_prev_state = NLP_STE_REG_LOGIN_ISSUE;
1522                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
1523         }
1524         return ndlp->nlp_state;
1525 }
1526
1527 static uint32_t
1528 lpfc_device_rm_reglogin_issue(struct lpfc_vport *vport,
1529                               struct lpfc_nodelist *ndlp,
1530                               void *arg,
1531                               uint32_t evt)
1532 {
1533         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1534
1535         if (ndlp->nlp_flag & NLP_NPR_2B_DISC) {
1536                 spin_lock_irq(shost->host_lock);
1537                 ndlp->nlp_flag |= NLP_NODEV_REMOVE;
1538                 spin_unlock_irq(shost->host_lock);
1539                 return ndlp->nlp_state;
1540         } else {
1541                 lpfc_drop_node(vport, ndlp);
1542                 return NLP_STE_FREED_NODE;
1543         }
1544 }
1545
1546 static uint32_t
1547 lpfc_device_recov_reglogin_issue(struct lpfc_vport *vport,
1548                                  struct lpfc_nodelist *ndlp,
1549                                  void *arg,
1550                                  uint32_t evt)
1551 {
1552         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1553
1554         /* Don't do anything that will mess up processing of the
1555          * previous RSCN.
1556          */
1557         if (vport->fc_flag & FC_RSCN_DEFERRED)
1558                 return ndlp->nlp_state;
1559
1560         ndlp->nlp_prev_state = NLP_STE_REG_LOGIN_ISSUE;
1561         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1562         spin_lock_irq(shost->host_lock);
1563         ndlp->nlp_flag |= NLP_IGNR_REG_CMPL;
1564         ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
1565         spin_unlock_irq(shost->host_lock);
1566         lpfc_disc_set_adisc(vport, ndlp);
1567         return ndlp->nlp_state;
1568 }
1569
1570 static uint32_t
1571 lpfc_rcv_plogi_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1572                           void *arg, uint32_t evt)
1573 {
1574         struct lpfc_iocbq *cmdiocb;
1575
1576         cmdiocb = (struct lpfc_iocbq *) arg;
1577
1578         lpfc_rcv_plogi(vport, ndlp, cmdiocb);
1579         return ndlp->nlp_state;
1580 }
1581
1582 static uint32_t
1583 lpfc_rcv_prli_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1584                          void *arg, uint32_t evt)
1585 {
1586         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1587
1588         lpfc_els_rsp_prli_acc(vport, cmdiocb, ndlp);
1589         return ndlp->nlp_state;
1590 }
1591
1592 static uint32_t
1593 lpfc_rcv_logo_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1594                          void *arg, uint32_t evt)
1595 {
1596         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1597
1598         /* Software abort outstanding PRLI before sending acc */
1599         lpfc_els_abort(vport->phba, ndlp);
1600
1601         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_LOGO);
1602         return ndlp->nlp_state;
1603 }
1604
1605 static uint32_t
1606 lpfc_rcv_padisc_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1607                            void *arg, uint32_t evt)
1608 {
1609         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1610
1611         lpfc_rcv_padisc(vport, ndlp, cmdiocb);
1612         return ndlp->nlp_state;
1613 }
1614
1615 /* This routine is envoked when we rcv a PRLO request from a nport
1616  * we are logged into.  We should send back a PRLO rsp setting the
1617  * appropriate bits.
1618  * NEXT STATE = PRLI_ISSUE
1619  */
1620 static uint32_t
1621 lpfc_rcv_prlo_prli_issue(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_cmpl_prli_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1632                           void *arg, uint32_t evt)
1633 {
1634         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1635         struct lpfc_iocbq *cmdiocb, *rspiocb;
1636         struct lpfc_hba   *phba = vport->phba;
1637         IOCB_t *irsp;
1638         PRLI *npr;
1639
1640         cmdiocb = (struct lpfc_iocbq *) arg;
1641         rspiocb = cmdiocb->context_un.rsp_iocb;
1642         npr = (PRLI *)lpfc_check_elscmpl_iocb(phba, cmdiocb, rspiocb);
1643
1644         irsp = &rspiocb->iocb;
1645         if (irsp->ulpStatus) {
1646                 if ((vport->port_type == LPFC_NPIV_PORT) &&
1647                     vport->cfg_restrict_login) {
1648                         goto out;
1649                 }
1650                 ndlp->nlp_prev_state = NLP_STE_PRLI_ISSUE;
1651                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
1652                 return ndlp->nlp_state;
1653         }
1654
1655         /* Check out PRLI rsp */
1656         ndlp->nlp_type &= ~(NLP_FCP_TARGET | NLP_FCP_INITIATOR);
1657         ndlp->nlp_fcp_info &= ~NLP_FCP_2_DEVICE;
1658         if ((npr->acceptRspCode == PRLI_REQ_EXECUTED) &&
1659             (npr->prliType == PRLI_FCP_TYPE)) {
1660                 if (npr->initiatorFunc)
1661                         ndlp->nlp_type |= NLP_FCP_INITIATOR;
1662                 if (npr->targetFunc)
1663                         ndlp->nlp_type |= NLP_FCP_TARGET;
1664                 if (npr->Retry)
1665                         ndlp->nlp_fcp_info |= NLP_FCP_2_DEVICE;
1666         }
1667         if (!(ndlp->nlp_type & NLP_FCP_TARGET) &&
1668             (vport->port_type == LPFC_NPIV_PORT) &&
1669              vport->cfg_restrict_login) {
1670 out:
1671                 spin_lock_irq(shost->host_lock);
1672                 ndlp->nlp_flag |= NLP_TARGET_REMOVE;
1673                 spin_unlock_irq(shost->host_lock);
1674                 lpfc_issue_els_logo(vport, ndlp, 0);
1675
1676                 ndlp->nlp_prev_state = NLP_STE_PRLI_ISSUE;
1677                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1678                 return ndlp->nlp_state;
1679         }
1680
1681         ndlp->nlp_prev_state = NLP_STE_PRLI_ISSUE;
1682         if (ndlp->nlp_type & NLP_FCP_TARGET)
1683                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_MAPPED_NODE);
1684         else
1685                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
1686         return ndlp->nlp_state;
1687 }
1688
1689 /*! lpfc_device_rm_prli_issue
1690  *
1691  * \pre
1692  * \post
1693  * \param   phba
1694  * \param   ndlp
1695  * \param   arg
1696  * \param   evt
1697  * \return  uint32_t
1698  *
1699  * \b Description:
1700  *    This routine is envoked when we a request to remove a nport we are in the
1701  *    process of PRLIing. We should software abort outstanding prli, unreg
1702  *    login, send a logout. We will change node state to UNUSED_NODE, put it
1703  *    on plogi list so it can be freed when LOGO completes.
1704  *
1705  */
1706
1707 static uint32_t
1708 lpfc_device_rm_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1709                           void *arg, uint32_t evt)
1710 {
1711         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1712
1713         if (ndlp->nlp_flag & NLP_NPR_2B_DISC) {
1714                 spin_lock_irq(shost->host_lock);
1715                 ndlp->nlp_flag |= NLP_NODEV_REMOVE;
1716                 spin_unlock_irq(shost->host_lock);
1717                 return ndlp->nlp_state;
1718         } else {
1719                 /* software abort outstanding PLOGI */
1720                 lpfc_els_abort(vport->phba, ndlp);
1721
1722                 lpfc_drop_node(vport, ndlp);
1723                 return NLP_STE_FREED_NODE;
1724         }
1725 }
1726
1727
1728 /*! lpfc_device_recov_prli_issue
1729  *
1730  * \pre
1731  * \post
1732  * \param   phba
1733  * \param   ndlp
1734  * \param   arg
1735  * \param   evt
1736  * \return  uint32_t
1737  *
1738  * \b Description:
1739  *    The routine is envoked when the state of a device is unknown, like
1740  *    during a link down. We should remove the nodelist entry from the
1741  *    unmapped list, issue a UNREG_LOGIN, do a software abort of the
1742  *    outstanding PRLI command, then free the node entry.
1743  */
1744 static uint32_t
1745 lpfc_device_recov_prli_issue(struct lpfc_vport *vport,
1746                              struct lpfc_nodelist *ndlp,
1747                              void *arg,
1748                              uint32_t evt)
1749 {
1750         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1751         struct lpfc_hba  *phba = vport->phba;
1752
1753         /* Don't do anything that will mess up processing of the
1754          * previous RSCN.
1755          */
1756         if (vport->fc_flag & FC_RSCN_DEFERRED)
1757                 return ndlp->nlp_state;
1758
1759         /* software abort outstanding PRLI */
1760         lpfc_els_abort(phba, ndlp);
1761
1762         ndlp->nlp_prev_state = NLP_STE_PRLI_ISSUE;
1763         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1764         spin_lock_irq(shost->host_lock);
1765         ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
1766         spin_unlock_irq(shost->host_lock);
1767         lpfc_disc_set_adisc(vport, ndlp);
1768         return ndlp->nlp_state;
1769 }
1770
1771 static uint32_t
1772 lpfc_rcv_plogi_unmap_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1773                           void *arg, uint32_t evt)
1774 {
1775         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1776
1777         lpfc_rcv_plogi(vport, ndlp, cmdiocb);
1778         return ndlp->nlp_state;
1779 }
1780
1781 static uint32_t
1782 lpfc_rcv_prli_unmap_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1783                          void *arg, uint32_t evt)
1784 {
1785         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1786
1787         lpfc_rcv_prli(vport, ndlp, cmdiocb);
1788         lpfc_els_rsp_prli_acc(vport, cmdiocb, ndlp);
1789         return ndlp->nlp_state;
1790 }
1791
1792 static uint32_t
1793 lpfc_rcv_logo_unmap_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1794                          void *arg, uint32_t evt)
1795 {
1796         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1797
1798         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_LOGO);
1799         return ndlp->nlp_state;
1800 }
1801
1802 static uint32_t
1803 lpfc_rcv_padisc_unmap_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1804                            void *arg, uint32_t evt)
1805 {
1806         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1807
1808         lpfc_rcv_padisc(vport, ndlp, cmdiocb);
1809         return ndlp->nlp_state;
1810 }
1811
1812 static uint32_t
1813 lpfc_rcv_prlo_unmap_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1814                          void *arg, uint32_t evt)
1815 {
1816         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1817
1818         lpfc_els_rsp_acc(vport, ELS_CMD_PRLO, cmdiocb, ndlp, NULL);
1819         return ndlp->nlp_state;
1820 }
1821
1822 static uint32_t
1823 lpfc_device_recov_unmap_node(struct lpfc_vport *vport,
1824                              struct lpfc_nodelist *ndlp,
1825                              void *arg,
1826                              uint32_t evt)
1827 {
1828         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1829
1830         ndlp->nlp_prev_state = NLP_STE_UNMAPPED_NODE;
1831         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1832         spin_lock_irq(shost->host_lock);
1833         ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
1834         spin_unlock_irq(shost->host_lock);
1835         lpfc_disc_set_adisc(vport, ndlp);
1836
1837         return ndlp->nlp_state;
1838 }
1839
1840 static uint32_t
1841 lpfc_rcv_plogi_mapped_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1842                            void *arg, uint32_t evt)
1843 {
1844         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1845
1846         lpfc_rcv_plogi(vport, ndlp, cmdiocb);
1847         return ndlp->nlp_state;
1848 }
1849
1850 static uint32_t
1851 lpfc_rcv_prli_mapped_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1852                           void *arg, uint32_t evt)
1853 {
1854         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1855
1856         lpfc_els_rsp_prli_acc(vport, cmdiocb, ndlp);
1857         return ndlp->nlp_state;
1858 }
1859
1860 static uint32_t
1861 lpfc_rcv_logo_mapped_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1862                           void *arg, uint32_t evt)
1863 {
1864         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1865
1866         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_LOGO);
1867         return ndlp->nlp_state;
1868 }
1869
1870 static uint32_t
1871 lpfc_rcv_padisc_mapped_node(struct lpfc_vport *vport,
1872                             struct lpfc_nodelist *ndlp,
1873                             void *arg, uint32_t evt)
1874 {
1875         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1876
1877         lpfc_rcv_padisc(vport, ndlp, cmdiocb);
1878         return ndlp->nlp_state;
1879 }
1880
1881 static uint32_t
1882 lpfc_rcv_prlo_mapped_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1883                           void *arg, uint32_t evt)
1884 {
1885         struct lpfc_hba  *phba = vport->phba;
1886         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1887
1888         /* flush the target */
1889         lpfc_sli_abort_iocb(vport, &phba->sli.ring[phba->sli.fcp_ring],
1890                             ndlp->nlp_sid, 0, LPFC_CTX_TGT);
1891
1892         /* Treat like rcv logo */
1893         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_PRLO);
1894         return ndlp->nlp_state;
1895 }
1896
1897 static uint32_t
1898 lpfc_device_recov_mapped_node(struct lpfc_vport *vport,
1899                               struct lpfc_nodelist *ndlp,
1900                               void *arg,
1901                               uint32_t evt)
1902 {
1903         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1904
1905         ndlp->nlp_prev_state = NLP_STE_MAPPED_NODE;
1906         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1907         spin_lock_irq(shost->host_lock);
1908         ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
1909         spin_unlock_irq(shost->host_lock);
1910         lpfc_disc_set_adisc(vport, ndlp);
1911         return ndlp->nlp_state;
1912 }
1913
1914 static uint32_t
1915 lpfc_rcv_plogi_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1916                         void *arg, uint32_t evt)
1917 {
1918         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1919         struct lpfc_iocbq *cmdiocb  = (struct lpfc_iocbq *) arg;
1920
1921         /* Ignore PLOGI if we have an outstanding LOGO */
1922         if (ndlp->nlp_flag & (NLP_LOGO_SND | NLP_LOGO_ACC))
1923                 return ndlp->nlp_state;
1924         if (lpfc_rcv_plogi(vport, ndlp, cmdiocb)) {
1925                 lpfc_cancel_retry_delay_tmo(vport, ndlp);
1926                 spin_lock_irq(shost->host_lock);
1927                 ndlp->nlp_flag &= ~(NLP_NPR_ADISC | NLP_NPR_2B_DISC);
1928                 spin_unlock_irq(shost->host_lock);
1929         } else if (!(ndlp->nlp_flag & NLP_NPR_2B_DISC)) {
1930                 /* send PLOGI immediately, move to PLOGI issue state */
1931                 if (!(ndlp->nlp_flag & NLP_DELAY_TMO)) {
1932                         ndlp->nlp_prev_state = NLP_STE_NPR_NODE;
1933                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
1934                         lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0);
1935                 }
1936         }
1937         return ndlp->nlp_state;
1938 }
1939
1940 static uint32_t
1941 lpfc_rcv_prli_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1942                        void *arg, uint32_t evt)
1943 {
1944         struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
1945         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1946         struct ls_rjt     stat;
1947
1948         memset(&stat, 0, sizeof (struct ls_rjt));
1949         stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
1950         stat.un.b.lsRjtRsnCodeExp = LSEXP_NOTHING_MORE;
1951         lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
1952
1953         if (!(ndlp->nlp_flag & NLP_DELAY_TMO)) {
1954                 if (ndlp->nlp_flag & NLP_NPR_ADISC) {
1955                         spin_lock_irq(shost->host_lock);
1956                         ndlp->nlp_flag &= ~NLP_NPR_ADISC;
1957                         ndlp->nlp_prev_state = NLP_STE_NPR_NODE;
1958                         spin_unlock_irq(shost->host_lock);
1959                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_ADISC_ISSUE);
1960                         lpfc_issue_els_adisc(vport, ndlp, 0);
1961                 } else {
1962                         ndlp->nlp_prev_state = NLP_STE_NPR_NODE;
1963                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
1964                         lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0);
1965                 }
1966         }
1967         return ndlp->nlp_state;
1968 }
1969
1970 static uint32_t
1971 lpfc_rcv_logo_npr_node(struct lpfc_vport *vport,  struct lpfc_nodelist *ndlp,
1972                        void *arg, uint32_t evt)
1973 {
1974         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1975
1976         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_LOGO);
1977         return ndlp->nlp_state;
1978 }
1979
1980 static uint32_t
1981 lpfc_rcv_padisc_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1982                          void *arg, uint32_t evt)
1983 {
1984         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1985
1986         lpfc_rcv_padisc(vport, ndlp, cmdiocb);
1987         /*
1988          * Do not start discovery if discovery is about to start
1989          * or discovery in progress for this node. Starting discovery
1990          * here will affect the counting of discovery threads.
1991          */
1992         if (!(ndlp->nlp_flag & NLP_DELAY_TMO) &&
1993             !(ndlp->nlp_flag & NLP_NPR_2B_DISC)) {
1994                 if (ndlp->nlp_flag & NLP_NPR_ADISC) {
1995                         ndlp->nlp_flag &= ~NLP_NPR_ADISC;
1996                         ndlp->nlp_prev_state = NLP_STE_NPR_NODE;
1997                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_ADISC_ISSUE);
1998                         lpfc_issue_els_adisc(vport, ndlp, 0);
1999                 } else {
2000                         ndlp->nlp_prev_state = NLP_STE_NPR_NODE;
2001                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
2002                         lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0);
2003                 }
2004         }
2005         return ndlp->nlp_state;
2006 }
2007
2008 static uint32_t
2009 lpfc_rcv_prlo_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
2010                        void *arg, uint32_t evt)
2011 {
2012         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
2013         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
2014
2015         spin_lock_irq(shost->host_lock);
2016         ndlp->nlp_flag |= NLP_LOGO_ACC;
2017         spin_unlock_irq(shost->host_lock);
2018
2019         lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
2020
2021         if ((ndlp->nlp_flag & NLP_DELAY_TMO) == 0) {
2022                 mod_timer(&ndlp->nlp_delayfunc, jiffies + HZ * 1);
2023                 spin_lock_irq(shost->host_lock);
2024                 ndlp->nlp_flag |= NLP_DELAY_TMO;
2025                 ndlp->nlp_flag &= ~NLP_NPR_ADISC;
2026                 spin_unlock_irq(shost->host_lock);
2027                 ndlp->nlp_last_elscmd = ELS_CMD_PLOGI;
2028         } else {
2029                 spin_lock_irq(shost->host_lock);
2030                 ndlp->nlp_flag &= ~NLP_NPR_ADISC;
2031                 spin_unlock_irq(shost->host_lock);
2032         }
2033         return ndlp->nlp_state;
2034 }
2035
2036 static uint32_t
2037 lpfc_cmpl_plogi_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
2038                          void *arg, uint32_t evt)
2039 {
2040         struct lpfc_iocbq *cmdiocb, *rspiocb;
2041         IOCB_t *irsp;
2042
2043         cmdiocb = (struct lpfc_iocbq *) arg;
2044         rspiocb = cmdiocb->context_un.rsp_iocb;
2045
2046         irsp = &rspiocb->iocb;
2047         if (irsp->ulpStatus) {
2048                 ndlp->nlp_flag |= NLP_DEFER_RM;
2049                 return NLP_STE_FREED_NODE;
2050         }
2051         return ndlp->nlp_state;
2052 }
2053
2054 static uint32_t
2055 lpfc_cmpl_prli_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
2056                         void *arg, uint32_t evt)
2057 {
2058         struct lpfc_iocbq *cmdiocb, *rspiocb;
2059         IOCB_t *irsp;
2060
2061         cmdiocb = (struct lpfc_iocbq *) arg;
2062         rspiocb = cmdiocb->context_un.rsp_iocb;
2063
2064         irsp = &rspiocb->iocb;
2065         if (irsp->ulpStatus && (ndlp->nlp_flag & NLP_NODEV_REMOVE)) {
2066                 lpfc_drop_node(vport, ndlp);
2067                 return NLP_STE_FREED_NODE;
2068         }
2069         return ndlp->nlp_state;
2070 }
2071
2072 static uint32_t
2073 lpfc_cmpl_logo_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
2074                         void *arg, uint32_t evt)
2075 {
2076         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
2077         if (ndlp->nlp_DID == Fabric_DID) {
2078                 spin_lock_irq(shost->host_lock);
2079                 vport->fc_flag &= ~(FC_FABRIC | FC_PUBLIC_LOOP);
2080                 spin_unlock_irq(shost->host_lock);
2081         }
2082         lpfc_unreg_rpi(vport, ndlp);
2083         return ndlp->nlp_state;
2084 }
2085
2086 static uint32_t
2087 lpfc_cmpl_adisc_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
2088                          void *arg, uint32_t evt)
2089 {
2090         struct lpfc_iocbq *cmdiocb, *rspiocb;
2091         IOCB_t *irsp;
2092
2093         cmdiocb = (struct lpfc_iocbq *) arg;
2094         rspiocb = cmdiocb->context_un.rsp_iocb;
2095
2096         irsp = &rspiocb->iocb;
2097         if (irsp->ulpStatus && (ndlp->nlp_flag & NLP_NODEV_REMOVE)) {
2098                 lpfc_drop_node(vport, ndlp);
2099                 return NLP_STE_FREED_NODE;
2100         }
2101         return ndlp->nlp_state;
2102 }
2103
2104 static uint32_t
2105 lpfc_cmpl_reglogin_npr_node(struct lpfc_vport *vport,
2106                             struct lpfc_nodelist *ndlp,
2107                             void *arg, uint32_t evt)
2108 {
2109         LPFC_MBOXQ_t *pmb = (LPFC_MBOXQ_t *) arg;
2110         MAILBOX_t    *mb = &pmb->u.mb;
2111
2112         if (!mb->mbxStatus) {
2113                 /* SLI4 ports have preallocated logical rpis. */
2114                 if (vport->phba->sli_rev < LPFC_SLI_REV4)
2115                         ndlp->nlp_rpi = mb->un.varWords[0];
2116                 ndlp->nlp_flag |= NLP_RPI_REGISTERED;
2117         } else {
2118                 if (ndlp->nlp_flag & NLP_NODEV_REMOVE) {
2119                         lpfc_drop_node(vport, ndlp);
2120                         return NLP_STE_FREED_NODE;
2121                 }
2122         }
2123         return ndlp->nlp_state;
2124 }
2125
2126 static uint32_t
2127 lpfc_device_rm_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
2128                         void *arg, uint32_t evt)
2129 {
2130         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
2131
2132         if (ndlp->nlp_flag & NLP_NPR_2B_DISC) {
2133                 spin_lock_irq(shost->host_lock);
2134                 ndlp->nlp_flag |= NLP_NODEV_REMOVE;
2135                 spin_unlock_irq(shost->host_lock);
2136                 return ndlp->nlp_state;
2137         }
2138         lpfc_drop_node(vport, ndlp);
2139         return NLP_STE_FREED_NODE;
2140 }
2141
2142 static uint32_t
2143 lpfc_device_recov_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
2144                            void *arg, uint32_t evt)
2145 {
2146         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
2147
2148         /* Don't do anything that will mess up processing of the
2149          * previous RSCN.
2150          */
2151         if (vport->fc_flag & FC_RSCN_DEFERRED)
2152                 return ndlp->nlp_state;
2153
2154         lpfc_cancel_retry_delay_tmo(vport, ndlp);
2155         spin_lock_irq(shost->host_lock);
2156         ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
2157         spin_unlock_irq(shost->host_lock);
2158         return ndlp->nlp_state;
2159 }
2160
2161
2162 /* This next section defines the NPort Discovery State Machine */
2163
2164 /* There are 4 different double linked lists nodelist entries can reside on.
2165  * The plogi list and adisc list are used when Link Up discovery or RSCN
2166  * processing is needed. Each list holds the nodes that we will send PLOGI
2167  * or ADISC on. These lists will keep track of what nodes will be effected
2168  * by an RSCN, or a Link Up (Typically, all nodes are effected on Link Up).
2169  * The unmapped_list will contain all nodes that we have successfully logged
2170  * into at the Fibre Channel level. The mapped_list will contain all nodes
2171  * that are mapped FCP targets.
2172  */
2173 /*
2174  * The bind list is a list of undiscovered (potentially non-existent) nodes
2175  * that we have saved binding information on. This information is used when
2176  * nodes transition from the unmapped to the mapped list.
2177  */
2178 /* For UNUSED_NODE state, the node has just been allocated .
2179  * For PLOGI_ISSUE and REG_LOGIN_ISSUE, the node is on
2180  * the PLOGI list. For REG_LOGIN_COMPL, the node is taken off the PLOGI list
2181  * and put on the unmapped list. For ADISC processing, the node is taken off
2182  * the ADISC list and placed on either the mapped or unmapped list (depending
2183  * on its previous state). Once on the unmapped list, a PRLI is issued and the
2184  * state changed to PRLI_ISSUE. When the PRLI completion occurs, the state is
2185  * changed to UNMAPPED_NODE. If the completion indicates a mapped
2186  * node, the node is taken off the unmapped list. The binding list is checked
2187  * for a valid binding, or a binding is automatically assigned. If binding
2188  * assignment is unsuccessful, the node is left on the unmapped list. If
2189  * binding assignment is successful, the associated binding list entry (if
2190  * any) is removed, and the node is placed on the mapped list.
2191  */
2192 /*
2193  * For a Link Down, all nodes on the ADISC, PLOGI, unmapped or mapped
2194  * lists will receive a DEVICE_RECOVERY event. If the linkdown or devloss timers
2195  * expire, all effected nodes will receive a DEVICE_RM event.
2196  */
2197 /*
2198  * For a Link Up or RSCN, all nodes will move from the mapped / unmapped lists
2199  * to either the ADISC or PLOGI list.  After a Nameserver query or ALPA loopmap
2200  * check, additional nodes may be added or removed (via DEVICE_RM) to / from
2201  * the PLOGI or ADISC lists. Once the PLOGI and ADISC lists are populated,
2202  * we will first process the ADISC list.  32 entries are processed initially and
2203  * ADISC is initited for each one.  Completions / Events for each node are
2204  * funnelled thru the state machine.  As each node finishes ADISC processing, it
2205  * starts ADISC for any nodes waiting for ADISC processing. If no nodes are
2206  * waiting, and the ADISC list count is identically 0, then we are done. For
2207  * Link Up discovery, since all nodes on the PLOGI list are UNREG_LOGIN'ed, we
2208  * can issue a CLEAR_LA and reenable Link Events. Next we will process the PLOGI
2209  * list.  32 entries are processed initially and PLOGI is initited for each one.
2210  * Completions / Events for each node are funnelled thru the state machine.  As
2211  * each node finishes PLOGI processing, it starts PLOGI for any nodes waiting
2212  * for PLOGI processing. If no nodes are waiting, and the PLOGI list count is
2213  * indentically 0, then we are done. We have now completed discovery / RSCN
2214  * handling. Upon completion, ALL nodes should be on either the mapped or
2215  * unmapped lists.
2216  */
2217
2218 static uint32_t (*lpfc_disc_action[NLP_STE_MAX_STATE * NLP_EVT_MAX_EVENT])
2219      (struct lpfc_vport *, struct lpfc_nodelist *, void *, uint32_t) = {
2220         /* Action routine                  Event       Current State  */
2221         lpfc_rcv_plogi_unused_node,     /* RCV_PLOGI   UNUSED_NODE    */
2222         lpfc_rcv_els_unused_node,       /* RCV_PRLI        */
2223         lpfc_rcv_logo_unused_node,      /* RCV_LOGO        */
2224         lpfc_rcv_els_unused_node,       /* RCV_ADISC       */
2225         lpfc_rcv_els_unused_node,       /* RCV_PDISC       */
2226         lpfc_rcv_els_unused_node,       /* RCV_PRLO        */
2227         lpfc_disc_illegal,              /* CMPL_PLOGI      */
2228         lpfc_disc_illegal,              /* CMPL_PRLI       */
2229         lpfc_cmpl_logo_unused_node,     /* CMPL_LOGO       */
2230         lpfc_disc_illegal,              /* CMPL_ADISC      */
2231         lpfc_disc_illegal,              /* CMPL_REG_LOGIN  */
2232         lpfc_device_rm_unused_node,     /* DEVICE_RM       */
2233         lpfc_device_recov_unused_node,  /* DEVICE_RECOVERY */
2234
2235         lpfc_rcv_plogi_plogi_issue,     /* RCV_PLOGI   PLOGI_ISSUE    */
2236         lpfc_rcv_prli_plogi_issue,      /* RCV_PRLI        */
2237         lpfc_rcv_logo_plogi_issue,      /* RCV_LOGO        */
2238         lpfc_rcv_els_plogi_issue,       /* RCV_ADISC       */
2239         lpfc_rcv_els_plogi_issue,       /* RCV_PDISC       */
2240         lpfc_rcv_els_plogi_issue,       /* RCV_PRLO        */
2241         lpfc_cmpl_plogi_plogi_issue,    /* CMPL_PLOGI      */
2242         lpfc_disc_illegal,              /* CMPL_PRLI       */
2243         lpfc_cmpl_logo_plogi_issue,     /* CMPL_LOGO       */
2244         lpfc_disc_illegal,              /* CMPL_ADISC      */
2245         lpfc_cmpl_reglogin_plogi_issue,/* CMPL_REG_LOGIN  */
2246         lpfc_device_rm_plogi_issue,     /* DEVICE_RM       */
2247         lpfc_device_recov_plogi_issue,  /* DEVICE_RECOVERY */
2248
2249         lpfc_rcv_plogi_adisc_issue,     /* RCV_PLOGI   ADISC_ISSUE    */
2250         lpfc_rcv_prli_adisc_issue,      /* RCV_PRLI        */
2251         lpfc_rcv_logo_adisc_issue,      /* RCV_LOGO        */
2252         lpfc_rcv_padisc_adisc_issue,    /* RCV_ADISC       */
2253         lpfc_rcv_padisc_adisc_issue,    /* RCV_PDISC       */
2254         lpfc_rcv_prlo_adisc_issue,      /* RCV_PRLO        */
2255         lpfc_disc_illegal,              /* CMPL_PLOGI      */
2256         lpfc_disc_illegal,              /* CMPL_PRLI       */
2257         lpfc_disc_illegal,              /* CMPL_LOGO       */
2258         lpfc_cmpl_adisc_adisc_issue,    /* CMPL_ADISC      */
2259         lpfc_disc_illegal,              /* CMPL_REG_LOGIN  */
2260         lpfc_device_rm_adisc_issue,     /* DEVICE_RM       */
2261         lpfc_device_recov_adisc_issue,  /* DEVICE_RECOVERY */
2262
2263         lpfc_rcv_plogi_reglogin_issue,  /* RCV_PLOGI  REG_LOGIN_ISSUE */
2264         lpfc_rcv_prli_reglogin_issue,   /* RCV_PLOGI       */
2265         lpfc_rcv_logo_reglogin_issue,   /* RCV_LOGO        */
2266         lpfc_rcv_padisc_reglogin_issue, /* RCV_ADISC       */
2267         lpfc_rcv_padisc_reglogin_issue, /* RCV_PDISC       */
2268         lpfc_rcv_prlo_reglogin_issue,   /* RCV_PRLO        */
2269         lpfc_cmpl_plogi_illegal,        /* CMPL_PLOGI      */
2270         lpfc_disc_illegal,              /* CMPL_PRLI       */
2271         lpfc_disc_illegal,              /* CMPL_LOGO       */
2272         lpfc_disc_illegal,              /* CMPL_ADISC      */
2273         lpfc_cmpl_reglogin_reglogin_issue,/* CMPL_REG_LOGIN  */
2274         lpfc_device_rm_reglogin_issue,  /* DEVICE_RM       */
2275         lpfc_device_recov_reglogin_issue,/* DEVICE_RECOVERY */
2276
2277         lpfc_rcv_plogi_prli_issue,      /* RCV_PLOGI   PRLI_ISSUE     */
2278         lpfc_rcv_prli_prli_issue,       /* RCV_PRLI        */
2279         lpfc_rcv_logo_prli_issue,       /* RCV_LOGO        */
2280         lpfc_rcv_padisc_prli_issue,     /* RCV_ADISC       */
2281         lpfc_rcv_padisc_prli_issue,     /* RCV_PDISC       */
2282         lpfc_rcv_prlo_prli_issue,       /* RCV_PRLO        */
2283         lpfc_cmpl_plogi_illegal,        /* CMPL_PLOGI      */
2284         lpfc_cmpl_prli_prli_issue,      /* CMPL_PRLI       */
2285         lpfc_disc_illegal,              /* CMPL_LOGO       */
2286         lpfc_disc_illegal,              /* CMPL_ADISC      */
2287         lpfc_disc_illegal,              /* CMPL_REG_LOGIN  */
2288         lpfc_device_rm_prli_issue,      /* DEVICE_RM       */
2289         lpfc_device_recov_prli_issue,   /* DEVICE_RECOVERY */
2290
2291         lpfc_rcv_plogi_unmap_node,      /* RCV_PLOGI   UNMAPPED_NODE  */
2292         lpfc_rcv_prli_unmap_node,       /* RCV_PRLI        */
2293         lpfc_rcv_logo_unmap_node,       /* RCV_LOGO        */
2294         lpfc_rcv_padisc_unmap_node,     /* RCV_ADISC       */
2295         lpfc_rcv_padisc_unmap_node,     /* RCV_PDISC       */
2296         lpfc_rcv_prlo_unmap_node,       /* RCV_PRLO        */
2297         lpfc_disc_illegal,              /* CMPL_PLOGI      */
2298         lpfc_disc_illegal,              /* CMPL_PRLI       */
2299         lpfc_disc_illegal,              /* CMPL_LOGO       */
2300         lpfc_disc_illegal,              /* CMPL_ADISC      */
2301         lpfc_disc_illegal,              /* CMPL_REG_LOGIN  */
2302         lpfc_disc_illegal,              /* DEVICE_RM       */
2303         lpfc_device_recov_unmap_node,   /* DEVICE_RECOVERY */
2304
2305         lpfc_rcv_plogi_mapped_node,     /* RCV_PLOGI   MAPPED_NODE    */
2306         lpfc_rcv_prli_mapped_node,      /* RCV_PRLI        */
2307         lpfc_rcv_logo_mapped_node,      /* RCV_LOGO        */
2308         lpfc_rcv_padisc_mapped_node,    /* RCV_ADISC       */
2309         lpfc_rcv_padisc_mapped_node,    /* RCV_PDISC       */
2310         lpfc_rcv_prlo_mapped_node,      /* RCV_PRLO        */
2311         lpfc_disc_illegal,              /* CMPL_PLOGI      */
2312         lpfc_disc_illegal,              /* CMPL_PRLI       */
2313         lpfc_disc_illegal,              /* CMPL_LOGO       */
2314         lpfc_disc_illegal,              /* CMPL_ADISC      */
2315         lpfc_disc_illegal,              /* CMPL_REG_LOGIN  */
2316         lpfc_disc_illegal,              /* DEVICE_RM       */
2317         lpfc_device_recov_mapped_node,  /* DEVICE_RECOVERY */
2318
2319         lpfc_rcv_plogi_npr_node,        /* RCV_PLOGI   NPR_NODE    */
2320         lpfc_rcv_prli_npr_node,         /* RCV_PRLI        */
2321         lpfc_rcv_logo_npr_node,         /* RCV_LOGO        */
2322         lpfc_rcv_padisc_npr_node,       /* RCV_ADISC       */
2323         lpfc_rcv_padisc_npr_node,       /* RCV_PDISC       */
2324         lpfc_rcv_prlo_npr_node,         /* RCV_PRLO        */
2325         lpfc_cmpl_plogi_npr_node,       /* CMPL_PLOGI      */
2326         lpfc_cmpl_prli_npr_node,        /* CMPL_PRLI       */
2327         lpfc_cmpl_logo_npr_node,        /* CMPL_LOGO       */
2328         lpfc_cmpl_adisc_npr_node,       /* CMPL_ADISC      */
2329         lpfc_cmpl_reglogin_npr_node,    /* CMPL_REG_LOGIN  */
2330         lpfc_device_rm_npr_node,        /* DEVICE_RM       */
2331         lpfc_device_recov_npr_node,     /* DEVICE_RECOVERY */
2332 };
2333
2334 int
2335 lpfc_disc_state_machine(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
2336                         void *arg, uint32_t evt)
2337 {
2338         uint32_t cur_state, rc;
2339         uint32_t(*func) (struct lpfc_vport *, struct lpfc_nodelist *, void *,
2340                          uint32_t);
2341         uint32_t got_ndlp = 0;
2342
2343         if (lpfc_nlp_get(ndlp))
2344                 got_ndlp = 1;
2345
2346         cur_state = ndlp->nlp_state;
2347
2348         /* DSM in event <evt> on NPort <nlp_DID> in state <cur_state> */
2349         lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
2350                          "0211 DSM in event x%x on NPort x%x in "
2351                          "state %d Data: x%x\n",
2352                          evt, ndlp->nlp_DID, cur_state, ndlp->nlp_flag);
2353
2354         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_DSM,
2355                  "DSM in:          evt:%d ste:%d did:x%x",
2356                 evt, cur_state, ndlp->nlp_DID);
2357
2358         func = lpfc_disc_action[(cur_state * NLP_EVT_MAX_EVENT) + evt];
2359         rc = (func) (vport, ndlp, arg, evt);
2360
2361         /* DSM out state <rc> on NPort <nlp_DID> */
2362         if (got_ndlp) {
2363                 lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
2364                          "0212 DSM out state %d on NPort x%x Data: x%x\n",
2365                          rc, ndlp->nlp_DID, ndlp->nlp_flag);
2366
2367                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_DSM,
2368                         "DSM out:         ste:%d did:x%x flg:x%x",
2369                         rc, ndlp->nlp_DID, ndlp->nlp_flag);
2370                 /* Decrement the ndlp reference count held for this function */
2371                 lpfc_nlp_put(ndlp);
2372         } else {
2373                 lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
2374                         "0213 DSM out state %d on NPort free\n", rc);
2375
2376                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_DSM,
2377                         "DSM out:         ste:%d did:x%x flg:x%x",
2378                         rc, 0, 0);
2379         }
2380
2381         return rc;
2382 }