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         /* Check for Nport to NPort pt2pt protocol */
 371         if ((vport->fc_flag & FC_PT2PT) &&
 372             !(vport->fc_flag & FC_PT2PT_PLOGI)) {
 373
 374                 /* rcv'ed PLOGI decides what our NPortId will be */
 375                 vport->fc_myDID = icmd->un.rcvels.parmRo;
 376                 mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
 377                 if (mbox == NULL)
 378                         goto out;
 379                 lpfc_config_link(phba, mbox);
 380                 mbox->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
 381                 mbox->vport = vport;
 382                 rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
 383                 if (rc == MBX_NOT_FINISHED) {
 384                         mempool_free(mbox, phba->mbox_mem_pool);
 385                         goto out;
 386                 }
 387                 /*
 388                  * For SLI4, the VFI/VPI are registered AFTER the
 389                  * Nport with the higher WWPN sends us a PLOGI with
 390                  * our assigned NPortId.
 391                  */
 392                 if (phba->sli_rev == LPFC_SLI_REV4)
 393                         lpfc_issue_reg_vfi(vport);
 394
 395                 lpfc_can_disctmo(vport);
 396         }
 397         mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
 398         if (!mbox)
 399                 goto out;
 400
 401         /* Registering an existing RPI behaves differently for SLI3 vs SLI4 */
 402         if (phba->sli_rev == LPFC_SLI_REV4)
 403                 lpfc_unreg_rpi(vport, ndlp);
 404
 405         rc = lpfc_reg_rpi(phba, vport->vpi, icmd->un.rcvels.remoteID,
 406                             (uint8_t *) sp, mbox, ndlp->nlp_rpi);
 407         if (rc) {
 408                 mempool_free(mbox, phba->mbox_mem_pool);
 409                 goto out;
 410         }
 411
 412         /* ACC PLOGI rsp command needs to execute first,
 413          * queue this mbox command to be processed later.
 414          */
 415         mbox->mbox_cmpl = lpfc_mbx_cmpl_reg_login;
 416         /*
 417          * mbox->context2 = lpfc_nlp_get(ndlp) deferred until mailbox
 418          * command issued in lpfc_cmpl_els_acc().
 419          */
 420         mbox->vport = vport;
 421         spin_lock_irq(shost->host_lock);
 422         ndlp->nlp_flag |= (NLP_ACC_REGLOGIN | NLP_RCV_PLOGI);
 423         spin_unlock_irq(shost->host_lock);
 424
 425         /*
 426          * If there is an outstanding PLOGI issued, abort it before
 427          * sending ACC rsp for received PLOGI. If pending plogi
 428          * is not canceled here, the plogi will be rejected by
 429          * remote port and will be retried. On a configuration with
 430          * single discovery thread, this will cause a huge delay in
 431          * discovery. Also this will cause multiple state machines
 432          * running in parallel for this node.
 433          */
 434         if (ndlp->nlp_state == NLP_STE_PLOGI_ISSUE) {
 435                 /* software abort outstanding PLOGI */
 436                 lpfc_els_abort(phba, ndlp);
 437         }
 438
 439         if ((vport->port_type == LPFC_NPIV_PORT &&
 440              vport->cfg_restrict_login)) {
 441
 442                 /* In order to preserve RPIs, we want to cleanup
 443                  * the default RPI the firmware created to rcv
 444                  * this ELS request. The only way to do this is
 445                  * to register, then unregister the RPI.
 446                  */
 447                 spin_lock_irq(shost->host_lock);
 448                 ndlp->nlp_flag |= NLP_RM_DFLT_RPI;
 449                 spin_unlock_irq(shost->host_lock);
 450                 stat.un.b.lsRjtRsnCode = LSRJT_INVALID_CMD;
 451                 stat.un.b.lsRjtRsnCodeExp = LSEXP_NOTHING_MORE;
 452                 rc = lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb,
 453                         ndlp, mbox);
 454                 if (rc)
 455                         mempool_free(mbox, phba->mbox_mem_pool);
 456                 return 1;
 457         }
 458         rc = lpfc_els_rsp_acc(vport, ELS_CMD_PLOGI, cmdiocb, ndlp, mbox);
 459         if (rc)
 460                 mempool_free(mbox, phba->mbox_mem_pool);
 461         return 1;
 462 out:
 463         stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
 464         stat.un.b.lsRjtRsnCodeExp = LSEXP_OUT_OF_RESOURCE;
 465         lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
 466         return 0;
 467 }
 468
 469 /**
 470  * lpfc_mbx_cmpl_resume_rpi - Resume RPI completion routine
 471  * @phba: pointer to lpfc hba data structure.
 472  * @mboxq: pointer to mailbox object
 473  *
 474  * This routine is invoked to issue a completion to a rcv'ed
 475  * ADISC or PDISC after the paused RPI has been resumed.
 476  **/
 477 static void
 478 lpfc_mbx_cmpl_resume_rpi(struct lpfc_hba *phba, LPFC_MBOXQ_t *mboxq)
 479 {
 480         struct lpfc_vport *vport;
 481         struct lpfc_iocbq *elsiocb;
 482         struct lpfc_nodelist *ndlp;
 483         uint32_t cmd;
 484
 485         elsiocb = (struct lpfc_iocbq *)mboxq->context1;
 486         ndlp = (struct lpfc_nodelist *) mboxq->context2;
 487         vport = mboxq->vport;
 488         cmd = elsiocb->drvrTimeout;
 489
 490         if (cmd == ELS_CMD_ADISC) {
 491                 lpfc_els_rsp_adisc_acc(vport, elsiocb, ndlp);
 492         } else {
 493                 lpfc_els_rsp_acc(vport, ELS_CMD_PLOGI, elsiocb,
 494                         ndlp, NULL);
 495         }
 496         kfree(elsiocb);
 497         mempool_free(mboxq, phba->mbox_mem_pool);
 498 }
 499
 500 static int
 501 lpfc_rcv_padisc(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 502                 struct lpfc_iocbq *cmdiocb)
 503 {
 504         struct Scsi_Host   *shost = lpfc_shost_from_vport(vport);
 505         struct lpfc_iocbq  *elsiocb;
 506         struct lpfc_dmabuf *pcmd;
 507         struct serv_parm   *sp;
 508         struct lpfc_name   *pnn, *ppn;
 509         struct ls_rjt stat;
 510         ADISC *ap;
 511         IOCB_t *icmd;
 512         uint32_t *lp;
 513         uint32_t cmd;
 514
 515         pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
 516         lp = (uint32_t *) pcmd->virt;
 517
 518         cmd = *lp++;
 519         if (cmd == ELS_CMD_ADISC) {
 520                 ap = (ADISC *) lp;
 521                 pnn = (struct lpfc_name *) & ap->nodeName;
 522                 ppn = (struct lpfc_name *) & ap->portName;
 523         } else {
 524                 sp = (struct serv_parm *) lp;
 525                 pnn = (struct lpfc_name *) & sp->nodeName;
 526                 ppn = (struct lpfc_name *) & sp->portName;
 527         }
 528
 529         icmd = &cmdiocb->iocb;
 530         if (icmd->ulpStatus == 0 && lpfc_check_adisc(vport, ndlp, pnn, ppn)) {
 531
 532                 /*
 533                  * As soon as  we send ACC, the remote NPort can
 534                  * start sending us data. Thus, for SLI4 we must
 535                  * resume the RPI before the ACC goes out.
 536                  */
 537                 if (vport->phba->sli_rev == LPFC_SLI_REV4) {
 538                         elsiocb = kmalloc(sizeof(struct lpfc_iocbq),
 539                                 GFP_KERNEL);
 540                         if (elsiocb) {
 541
 542                                 /* Save info from cmd IOCB used in rsp */
 543                                 memcpy((uint8_t *)elsiocb, (uint8_t *)cmdiocb,
 544                                         sizeof(struct lpfc_iocbq));
 545
 546                                 /* Save the ELS cmd */
 547                                 elsiocb->drvrTimeout = cmd;
 548
 549                                 lpfc_sli4_resume_rpi(ndlp,
 550                                         lpfc_mbx_cmpl_resume_rpi, elsiocb);
 551                                 goto out;
 552                         }
 553                 }
 554
 555                 if (cmd == ELS_CMD_ADISC) {
 556                         lpfc_els_rsp_adisc_acc(vport, cmdiocb, ndlp);
 557                 } else {
 558                         lpfc_els_rsp_acc(vport, ELS_CMD_PLOGI, cmdiocb,
 559                                 ndlp, NULL);
 560                 }
 561 out:
 562                 /* If we are authenticated, move to the proper state */
 563                 if (ndlp->nlp_type & NLP_FCP_TARGET)
 564                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_MAPPED_NODE);
 565                 else
 566                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
 567
 568                 return 1;
 569         }
 570         /* Reject this request because invalid parameters */
 571         stat.un.b.lsRjtRsvd0 = 0;
 572         stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
 573         stat.un.b.lsRjtRsnCodeExp = LSEXP_SPARM_OPTIONS;
 574         stat.un.b.vendorUnique = 0;
 575         lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
 576
 577         /* 1 sec timeout */
 578         mod_timer(&ndlp->nlp_delayfunc, jiffies + HZ);
 579
 580         spin_lock_irq(shost->host_lock);
 581         ndlp->nlp_flag |= NLP_DELAY_TMO;
 582         spin_unlock_irq(shost->host_lock);
 583         ndlp->nlp_last_elscmd = ELS_CMD_PLOGI;
 584         ndlp->nlp_prev_state = ndlp->nlp_state;
 585         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
 586         return 0;
 587 }
 588
 589 static int
 590 lpfc_rcv_logo(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 591               struct lpfc_iocbq *cmdiocb, uint32_t els_cmd)
 592 {
 593         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
 594         struct lpfc_hba    *phba = vport->phba;
 595         struct lpfc_vport **vports;
 596         int i, active_vlink_present = 0 ;
 597
 598         /* Put ndlp in NPR state with 1 sec timeout for plogi, ACC logo */
 599         /* Only call LOGO ACC for first LOGO, this avoids sending unnecessary
 600          * PLOGIs during LOGO storms from a device.
 601          */
 602         spin_lock_irq(shost->host_lock);
 603         ndlp->nlp_flag |= NLP_LOGO_ACC;
 604         spin_unlock_irq(shost->host_lock);
 605         if (els_cmd == ELS_CMD_PRLO)
 606                 lpfc_els_rsp_acc(vport, ELS_CMD_PRLO, cmdiocb, ndlp, NULL);
 607         else
 608                 lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
 609         if (ndlp->nlp_DID == Fabric_DID) {
 610                 if (vport->port_state <= LPFC_FDISC)
 611                         goto out;
 612                 lpfc_linkdown_port(vport);
 613                 spin_lock_irq(shost->host_lock);
 614                 vport->fc_flag |= FC_VPORT_LOGO_RCVD;
 615                 spin_unlock_irq(shost->host_lock);
 616                 vports = lpfc_create_vport_work_array(phba);
 617                 if (vports) {
 618                         for (i = 0; i <= phba->max_vports && vports[i] != NULL;
 619                                         i++) {
 620                                 if ((!(vports[i]->fc_flag &
 621                                         FC_VPORT_LOGO_RCVD)) &&
 622                                         (vports[i]->port_state > LPFC_FDISC)) {
 623                                         active_vlink_present = 1;
 624                                         break;
 625                                 }
 626                         }
 627                         lpfc_destroy_vport_work_array(phba, vports);
 628                 }
 629
 630                 if (active_vlink_present) {
 631                         /*
 632                          * If there are other active VLinks present,
 633                          * re-instantiate the Vlink using FDISC.
 634                          */
 635                         mod_timer(&ndlp->nlp_delayfunc, jiffies + HZ);
 636                         spin_lock_irq(shost->host_lock);
 637                         ndlp->nlp_flag |= NLP_DELAY_TMO;
 638                         spin_unlock_irq(shost->host_lock);
 639                         ndlp->nlp_last_elscmd = ELS_CMD_FDISC;
 640                         vport->port_state = LPFC_FDISC;
 641                 } else {
 642                         spin_lock_irq(shost->host_lock);
 643                         phba->pport->fc_flag &= ~FC_LOGO_RCVD_DID_CHNG;
 644                         spin_unlock_irq(shost->host_lock);
 645                         lpfc_retry_pport_discovery(phba);
 646                 }
 647         } else if ((!(ndlp->nlp_type & NLP_FABRIC) &&
 648                 ((ndlp->nlp_type & NLP_FCP_TARGET) ||
 649                 !(ndlp->nlp_type & NLP_FCP_INITIATOR))) ||
 650                 (ndlp->nlp_state == NLP_STE_ADISC_ISSUE)) {
 651                 /* Only try to re-login if this is NOT a Fabric Node */
 652                 mod_timer(&ndlp->nlp_delayfunc, jiffies + HZ * 1);
 653                 spin_lock_irq(shost->host_lock);
 654                 ndlp->nlp_flag |= NLP_DELAY_TMO;
 655                 spin_unlock_irq(shost->host_lock);
 656
 657                 ndlp->nlp_last_elscmd = ELS_CMD_PLOGI;
 658         }
 659 out:
 660         ndlp->nlp_prev_state = ndlp->nlp_state;
 661         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
 662
 663         spin_lock_irq(shost->host_lock);
 664         ndlp->nlp_flag &= ~NLP_NPR_ADISC;
 665         spin_unlock_irq(shost->host_lock);
 666         /* The driver has to wait until the ACC completes before it continues
 667          * processing the LOGO.  The action will resume in
 668          * lpfc_cmpl_els_logo_acc routine. Since part of processing includes an
 669          * unreg_login, the driver waits so the ACC does not get aborted.
 670          */
 671         return 0;
 672 }
 673
 674 static void
 675 lpfc_rcv_prli(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 676               struct lpfc_iocbq *cmdiocb)
 677 {
 678         struct lpfc_dmabuf *pcmd;
 679         uint32_t *lp;
 680         PRLI *npr;
 681         struct fc_rport *rport = ndlp->rport;
 682         u32 roles;
 683
 684         pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
 685         lp = (uint32_t *) pcmd->virt;
 686         npr = (PRLI *) ((uint8_t *) lp + sizeof (uint32_t));
 687
 688         ndlp->nlp_type &= ~(NLP_FCP_TARGET | NLP_FCP_INITIATOR);
 689         ndlp->nlp_fcp_info &= ~NLP_FCP_2_DEVICE;
 690         if (npr->prliType == PRLI_FCP_TYPE) {
 691                 if (npr->initiatorFunc)
 692                         ndlp->nlp_type |= NLP_FCP_INITIATOR;
 693                 if (npr->targetFunc)
 694                         ndlp->nlp_type |= NLP_FCP_TARGET;
 695                 if (npr->Retry)
 696                         ndlp->nlp_fcp_info |= NLP_FCP_2_DEVICE;
 697         }
 698         if (rport) {
 699                 /* We need to update the rport role values */
 700                 roles = FC_RPORT_ROLE_UNKNOWN;
 701                 if (ndlp->nlp_type & NLP_FCP_INITIATOR)
 702                         roles |= FC_RPORT_ROLE_FCP_INITIATOR;
 703                 if (ndlp->nlp_type & NLP_FCP_TARGET)
 704                         roles |= FC_RPORT_ROLE_FCP_TARGET;
 705
 706                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_RPORT,
 707                         "rport rolechg:   role:x%x did:x%x flg:x%x",
 708                         roles, ndlp->nlp_DID, ndlp->nlp_flag);
 709
 710                 fc_remote_port_rolechg(rport, roles);
 711         }
 712 }
 713
 714 static uint32_t
 715 lpfc_disc_set_adisc(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
 716 {
 717         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
 718
 719         if (!(ndlp->nlp_flag & NLP_RPI_REGISTERED)) {
 720                 ndlp->nlp_flag &= ~NLP_NPR_ADISC;
 721                 return 0;
 722         }
 723
 724         if (!(vport->fc_flag & FC_PT2PT)) {
 725                 /* Check config parameter use-adisc or FCP-2 */
 726                 if ((vport->cfg_use_adisc && (vport->fc_flag & FC_RSCN_MODE)) ||
 727                     ((ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) &&
 728                      (ndlp->nlp_type & NLP_FCP_TARGET))) {
 729                         spin_lock_irq(shost->host_lock);
 730                         ndlp->nlp_flag |= NLP_NPR_ADISC;
 731                         spin_unlock_irq(shost->host_lock);
 732                         return 1;
 733                 }
 734         }
 735         ndlp->nlp_flag &= ~NLP_NPR_ADISC;
 736         lpfc_unreg_rpi(vport, ndlp);
 737         return 0;
 738 }
 739
 740 /**
 741  * lpfc_release_rpi - Release a RPI by issuing unreg_login mailbox cmd.
 742  * @phba : Pointer to lpfc_hba structure.
 743  * @vport: Pointer to lpfc_vport structure.
 744  * @rpi  : rpi to be release.
 745  *
 746  * This function will send a unreg_login mailbox command to the firmware
 747  * to release a rpi.
 748  **/
 749 void
 750 lpfc_release_rpi(struct lpfc_hba *phba,
 751                 struct lpfc_vport *vport,
 752                 uint16_t rpi)
 753 {
 754         LPFC_MBOXQ_t *pmb;
 755         int rc;
 756
 757         pmb = (LPFC_MBOXQ_t *) mempool_alloc(phba->mbox_mem_pool,
 758                         GFP_KERNEL);
 759         if (!pmb)
 760                 lpfc_printf_vlog(vport, KERN_ERR, LOG_MBOX,
 761                         "2796 mailbox memory allocation failed \n");
 762         else {
 763                 lpfc_unreg_login(phba, vport->vpi, rpi, pmb);
 764                 pmb->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
 765                 rc = lpfc_sli_issue_mbox(phba, pmb, MBX_NOWAIT);
 766                 if (rc == MBX_NOT_FINISHED)
 767                         mempool_free(pmb, phba->mbox_mem_pool);
 768         }
 769 }
 770
 771 static uint32_t
 772 lpfc_disc_illegal(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 773                   void *arg, uint32_t evt)
 774 {
 775         struct lpfc_hba *phba;
 776         LPFC_MBOXQ_t *pmb = (LPFC_MBOXQ_t *) arg;
 777         MAILBOX_t *mb;
 778         uint16_t rpi;
 779
 780         phba = vport->phba;
 781         /* Release the RPI if reglogin completing */
 782         if (!(phba->pport->load_flag & FC_UNLOADING) &&
 783                 (evt == NLP_EVT_CMPL_REG_LOGIN) &&
 784                 (!pmb->u.mb.mbxStatus)) {
 785                 mb = &pmb->u.mb;
 786                 rpi = pmb->u.mb.un.varWords[0];
 787                 lpfc_release_rpi(phba, vport, rpi);
 788         }
 789         lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
 790                          "0271 Illegal State Transition: node x%x "
 791                          "event x%x, state x%x Data: x%x x%x\n",
 792                          ndlp->nlp_DID, evt, ndlp->nlp_state, ndlp->nlp_rpi,
 793                          ndlp->nlp_flag);
 794         return ndlp->nlp_state;
 795 }
 796
 797 static uint32_t
 798 lpfc_cmpl_plogi_illegal(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 799                   void *arg, uint32_t evt)
 800 {
 801         /* This transition is only legal if we previously
 802          * rcv'ed a PLOGI. Since we don't want 2 discovery threads
 803          * working on the same NPortID, do nothing for this thread
 804          * to stop it.
 805          */
 806         if (!(ndlp->nlp_flag & NLP_RCV_PLOGI)) {
 807                 lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
 808                          "0272 Illegal State Transition: node x%x "
 809                          "event x%x, state x%x Data: x%x x%x\n",
 810                          ndlp->nlp_DID, evt, ndlp->nlp_state, ndlp->nlp_rpi,
 811                          ndlp->nlp_flag);
 812         }
 813         return ndlp->nlp_state;
 814 }
 815
 816 /* Start of Discovery State Machine routines */
 817
 818 static uint32_t
 819 lpfc_rcv_plogi_unused_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 820                            void *arg, uint32_t evt)
 821 {
 822         struct lpfc_iocbq *cmdiocb;
 823
 824         cmdiocb = (struct lpfc_iocbq *) arg;
 825
 826         if (lpfc_rcv_plogi(vport, ndlp, cmdiocb)) {
 827                 return ndlp->nlp_state;
 828         }
 829         return NLP_STE_FREED_NODE;
 830 }
 831
 832 static uint32_t
 833 lpfc_rcv_els_unused_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 834                          void *arg, uint32_t evt)
 835 {
 836         lpfc_issue_els_logo(vport, ndlp, 0);
 837         return ndlp->nlp_state;
 838 }
 839
 840 static uint32_t
 841 lpfc_rcv_logo_unused_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 842                           void *arg, uint32_t evt)
 843 {
 844         struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
 845         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
 846
 847         spin_lock_irq(shost->host_lock);
 848         ndlp->nlp_flag |= NLP_LOGO_ACC;
 849         spin_unlock_irq(shost->host_lock);
 850         lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
 851
 852         return ndlp->nlp_state;
 853 }
 854
 855 static uint32_t
 856 lpfc_cmpl_logo_unused_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 857                            void *arg, uint32_t evt)
 858 {
 859         return NLP_STE_FREED_NODE;
 860 }
 861
 862 static uint32_t
 863 lpfc_device_rm_unused_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 864                            void *arg, uint32_t evt)
 865 {
 866         return NLP_STE_FREED_NODE;
 867 }
 868
 869 static uint32_t
 870 lpfc_device_recov_unused_node(struct lpfc_vport *vport,
 871                         struct lpfc_nodelist *ndlp,
 872                            void *arg, uint32_t evt)
 873 {
 874         return ndlp->nlp_state;
 875 }
 876
 877 static uint32_t
 878 lpfc_rcv_plogi_plogi_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 879                            void *arg, uint32_t evt)
 880 {
 881         struct Scsi_Host   *shost = lpfc_shost_from_vport(vport);
 882         struct lpfc_hba   *phba = vport->phba;
 883         struct lpfc_iocbq *cmdiocb = arg;
 884         struct lpfc_dmabuf *pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
 885         uint32_t *lp = (uint32_t *) pcmd->virt;
 886         struct serv_parm *sp = (struct serv_parm *) (lp + 1);
 887         struct ls_rjt stat;
 888         int port_cmp;
 889
 890         memset(&stat, 0, sizeof (struct ls_rjt));
 891
 892         /* For a PLOGI, we only accept if our portname is less
 893          * than the remote portname.
 894          */
 895         phba->fc_stat.elsLogiCol++;
 896         port_cmp = memcmp(&vport->fc_portname, &sp->portName,
 897                           sizeof(struct lpfc_name));
 898
 899         if (port_cmp >= 0) {
 900                 /* Reject this request because the remote node will accept
 901                    ours */
 902                 stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
 903                 stat.un.b.lsRjtRsnCodeExp = LSEXP_CMD_IN_PROGRESS;
 904                 lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp,
 905                         NULL);
 906         } else {
 907                 if (lpfc_rcv_plogi(vport, ndlp, cmdiocb) &&
 908                     (ndlp->nlp_flag & NLP_NPR_2B_DISC) &&
 909                     (vport->num_disc_nodes)) {
 910                         spin_lock_irq(shost->host_lock);
 911                         ndlp->nlp_flag &= ~NLP_NPR_2B_DISC;
 912                         spin_unlock_irq(shost->host_lock);
 913                         /* Check if there are more PLOGIs to be sent */
 914                         lpfc_more_plogi(vport);
 915                         if (vport->num_disc_nodes == 0) {
 916                                 spin_lock_irq(shost->host_lock);
 917                                 vport->fc_flag &= ~FC_NDISC_ACTIVE;
 918                                 spin_unlock_irq(shost->host_lock);
 919                                 lpfc_can_disctmo(vport);
 920                                 lpfc_end_rscn(vport);
 921                         }
 922                 }
 923         } /* If our portname was less */
 924
 925         return ndlp->nlp_state;
 926 }
 927
 928 static uint32_t
 929 lpfc_rcv_prli_plogi_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 930                           void *arg, uint32_t evt)
 931 {
 932         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
 933         struct ls_rjt     stat;
 934
 935         memset(&stat, 0, sizeof (struct ls_rjt));
 936         stat.un.b.lsRjtRsnCode = LSRJT_LOGICAL_BSY;
 937         stat.un.b.lsRjtRsnCodeExp = LSEXP_NOTHING_MORE;
 938         lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
 939         return ndlp->nlp_state;
 940 }
 941
 942 static uint32_t
 943 lpfc_rcv_logo_plogi_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 944                           void *arg, uint32_t evt)
 945 {
 946         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
 947
 948                                 /* software abort outstanding PLOGI */
 949         lpfc_els_abort(vport->phba, ndlp);
 950
 951         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_LOGO);
 952         return ndlp->nlp_state;
 953 }
 954
 955 static uint32_t
 956 lpfc_rcv_els_plogi_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 957                          void *arg, uint32_t evt)
 958 {
 959         struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
 960         struct lpfc_hba   *phba = vport->phba;
 961         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
 962
 963         /* software abort outstanding PLOGI */
 964         lpfc_els_abort(phba, ndlp);
 965
 966         if (evt == NLP_EVT_RCV_LOGO) {
 967                 lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
 968         } else {
 969                 lpfc_issue_els_logo(vport, ndlp, 0);
 970         }
 971
 972         /* Put ndlp in npr state set plogi timer for 1 sec */
 973         mod_timer(&ndlp->nlp_delayfunc, jiffies + HZ * 1);
 974         spin_lock_irq(shost->host_lock);
 975         ndlp->nlp_flag |= NLP_DELAY_TMO;
 976         spin_unlock_irq(shost->host_lock);
 977         ndlp->nlp_last_elscmd = ELS_CMD_PLOGI;
 978         ndlp->nlp_prev_state = NLP_STE_PLOGI_ISSUE;
 979         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
 980
 981         return ndlp->nlp_state;
 982 }
 983
 984 static uint32_t
 985 lpfc_cmpl_plogi_plogi_issue(struct lpfc_vport *vport,
 986                             struct lpfc_nodelist *ndlp,
 987                             void *arg,
 988                             uint32_t evt)
 989 {
 990         struct lpfc_hba    *phba = vport->phba;
 991         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
 992         struct lpfc_iocbq  *cmdiocb, *rspiocb;
 993         struct lpfc_dmabuf *pcmd, *prsp, *mp;
 994         uint32_t *lp;
 995         IOCB_t *irsp;
 996         struct serv_parm *sp;
 997         LPFC_MBOXQ_t *mbox;
 998
 999         cmdiocb = (struct lpfc_iocbq *) arg;
1000         rspiocb = cmdiocb->context_un.rsp_iocb;
1001
1002         if (ndlp->nlp_flag & NLP_ACC_REGLOGIN) {
1003                 /* Recovery from PLOGI collision logic */
1004                 return ndlp->nlp_state;
1005         }
1006
1007         irsp = &rspiocb->iocb;
1008
1009         if (irsp->ulpStatus)
1010                 goto out;
1011
1012         pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
1013
1014         prsp = list_get_first(&pcmd->list, struct lpfc_dmabuf, list);
1015
1016         lp = (uint32_t *) prsp->virt;
1017         sp = (struct serv_parm *) ((uint8_t *) lp + sizeof (uint32_t));
1018
1019         /* Some switches have FDMI servers returning 0 for WWN */
1020         if ((ndlp->nlp_DID != FDMI_DID) &&
1021                 (wwn_to_u64(sp->portName.u.wwn) == 0 ||
1022                 wwn_to_u64(sp->nodeName.u.wwn) == 0)) {
1023                 lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
1024                                  "0142 PLOGI RSP: Invalid WWN.\n");
1025                 goto out;
1026         }
1027         if (!lpfc_check_sparm(vport, ndlp, sp, CLASS3, 0))
1028                 goto out;
1029         /* PLOGI chkparm OK */
1030         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
1031                          "0121 PLOGI chkparm OK Data: x%x x%x x%x x%x\n",
1032                          ndlp->nlp_DID, ndlp->nlp_state,
1033                          ndlp->nlp_flag, ndlp->nlp_rpi);
1034         if (vport->cfg_fcp_class == 2 && (sp->cls2.classValid))
1035                 ndlp->nlp_fcp_info |= CLASS2;
1036         else
1037                 ndlp->nlp_fcp_info |= CLASS3;
1038
1039         ndlp->nlp_class_sup = 0;
1040         if (sp->cls1.classValid)
1041                 ndlp->nlp_class_sup |= FC_COS_CLASS1;
1042         if (sp->cls2.classValid)
1043                 ndlp->nlp_class_sup |= FC_COS_CLASS2;
1044         if (sp->cls3.classValid)
1045                 ndlp->nlp_class_sup |= FC_COS_CLASS3;
1046         if (sp->cls4.classValid)
1047                 ndlp->nlp_class_sup |= FC_COS_CLASS4;
1048         ndlp->nlp_maxframe =
1049                 ((sp->cmn.bbRcvSizeMsb & 0x0F) << 8) | sp->cmn.bbRcvSizeLsb;
1050
1051         mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
1052         if (!mbox) {
1053                 lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
1054                         "0133 PLOGI: no memory for reg_login "
1055                         "Data: x%x x%x x%x x%x\n",
1056                         ndlp->nlp_DID, ndlp->nlp_state,
1057                         ndlp->nlp_flag, ndlp->nlp_rpi);
1058                 goto out;
1059         }
1060
1061         lpfc_unreg_rpi(vport, ndlp);
1062
1063         if (lpfc_reg_rpi(phba, vport->vpi, irsp->un.elsreq64.remoteID,
1064                          (uint8_t *) sp, mbox, ndlp->nlp_rpi) == 0) {
1065                 switch (ndlp->nlp_DID) {
1066                 case NameServer_DID:
1067                         mbox->mbox_cmpl = lpfc_mbx_cmpl_ns_reg_login;
1068                         break;
1069                 case FDMI_DID:
1070                         mbox->mbox_cmpl = lpfc_mbx_cmpl_fdmi_reg_login;
1071                         break;
1072                 default:
1073                         ndlp->nlp_flag |= NLP_REG_LOGIN_SEND;
1074                         mbox->mbox_cmpl = lpfc_mbx_cmpl_reg_login;
1075                 }
1076                 mbox->context2 = lpfc_nlp_get(ndlp);
1077                 mbox->vport = vport;
1078                 if (lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT)
1079                     != MBX_NOT_FINISHED) {
1080                         lpfc_nlp_set_state(vport, ndlp,
1081                                            NLP_STE_REG_LOGIN_ISSUE);
1082                         return ndlp->nlp_state;
1083                 }
1084                 if (ndlp->nlp_flag & NLP_REG_LOGIN_SEND)
1085                         ndlp->nlp_flag &= ~NLP_REG_LOGIN_SEND;
1086                 /* decrement node reference count to the failed mbox
1087                  * command
1088                  */
1089                 lpfc_nlp_put(ndlp);
1090                 mp = (struct lpfc_dmabuf *) mbox->context1;
1091                 lpfc_mbuf_free(phba, mp->virt, mp->phys);
1092                 kfree(mp);
1093                 mempool_free(mbox, phba->mbox_mem_pool);
1094
1095                 lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
1096                                  "0134 PLOGI: cannot issue reg_login "
1097                                  "Data: x%x x%x x%x x%x\n",
1098                                  ndlp->nlp_DID, ndlp->nlp_state,
1099                                  ndlp->nlp_flag, ndlp->nlp_rpi);
1100         } else {
1101                 mempool_free(mbox, phba->mbox_mem_pool);
1102
1103                 lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
1104                                  "0135 PLOGI: cannot format reg_login "
1105                                  "Data: x%x x%x x%x x%x\n",
1106                                  ndlp->nlp_DID, ndlp->nlp_state,
1107                                  ndlp->nlp_flag, ndlp->nlp_rpi);
1108         }
1109
1110
1111 out:
1112         if (ndlp->nlp_DID == NameServer_DID) {
1113                 lpfc_vport_set_state(vport, FC_VPORT_FAILED);
1114                 lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
1115                                  "0261 Cannot Register NameServer login\n");
1116         }
1117
1118         spin_lock_irq(shost->host_lock);
1119         ndlp->nlp_flag |= NLP_DEFER_RM;
1120         spin_unlock_irq(shost->host_lock);
1121         return NLP_STE_FREED_NODE;
1122 }
1123
1124 static uint32_t
1125 lpfc_cmpl_logo_plogi_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1126                            void *arg, uint32_t evt)
1127 {
1128         return ndlp->nlp_state;
1129 }
1130
1131 static uint32_t
1132 lpfc_cmpl_reglogin_plogi_issue(struct lpfc_vport *vport,
1133         struct lpfc_nodelist *ndlp, void *arg, uint32_t evt)
1134 {
1135         struct lpfc_hba *phba;
1136         LPFC_MBOXQ_t *pmb = (LPFC_MBOXQ_t *) arg;
1137         MAILBOX_t *mb = &pmb->u.mb;
1138         uint16_t rpi;
1139
1140         phba = vport->phba;
1141         /* Release the RPI */
1142         if (!(phba->pport->load_flag & FC_UNLOADING) &&
1143                 !mb->mbxStatus) {
1144                 rpi = pmb->u.mb.un.varWords[0];
1145                 lpfc_release_rpi(phba, vport, rpi);
1146         }
1147         return ndlp->nlp_state;
1148 }
1149
1150 static uint32_t
1151 lpfc_device_rm_plogi_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1152                            void *arg, uint32_t evt)
1153 {
1154         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1155
1156         if (ndlp->nlp_flag & NLP_NPR_2B_DISC) {
1157                 spin_lock_irq(shost->host_lock);
1158                 ndlp->nlp_flag |= NLP_NODEV_REMOVE;
1159                 spin_unlock_irq(shost->host_lock);
1160                 return ndlp->nlp_state;
1161         } else {
1162                 /* software abort outstanding PLOGI */
1163                 lpfc_els_abort(vport->phba, ndlp);
1164
1165                 lpfc_drop_node(vport, ndlp);
1166                 return NLP_STE_FREED_NODE;
1167         }
1168 }
1169
1170 static uint32_t
1171 lpfc_device_recov_plogi_issue(struct lpfc_vport *vport,
1172                               struct lpfc_nodelist *ndlp,
1173                               void *arg,
1174                               uint32_t evt)
1175 {
1176         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1177         struct lpfc_hba  *phba = vport->phba;
1178
1179         /* Don't do anything that will mess up processing of the
1180          * previous RSCN.
1181          */
1182         if (vport->fc_flag & FC_RSCN_DEFERRED)
1183                 return ndlp->nlp_state;
1184
1185         /* software abort outstanding PLOGI */
1186         lpfc_els_abort(phba, ndlp);
1187
1188         ndlp->nlp_prev_state = NLP_STE_PLOGI_ISSUE;
1189         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1190         spin_lock_irq(shost->host_lock);
1191         ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
1192         spin_unlock_irq(shost->host_lock);
1193
1194         return ndlp->nlp_state;
1195 }
1196
1197 static uint32_t
1198 lpfc_rcv_plogi_adisc_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1199                            void *arg, uint32_t evt)
1200 {
1201         struct Scsi_Host   *shost = lpfc_shost_from_vport(vport);
1202         struct lpfc_hba   *phba = vport->phba;
1203         struct lpfc_iocbq *cmdiocb;
1204
1205         /* software abort outstanding ADISC */
1206         lpfc_els_abort(phba, ndlp);
1207
1208         cmdiocb = (struct lpfc_iocbq *) arg;
1209
1210         if (lpfc_rcv_plogi(vport, ndlp, cmdiocb)) {
1211                 if (ndlp->nlp_flag & NLP_NPR_2B_DISC) {
1212                         spin_lock_irq(shost->host_lock);
1213                         ndlp->nlp_flag &= ~NLP_NPR_2B_DISC;
1214                         spin_unlock_irq(shost->host_lock);
1215                         if (vport->num_disc_nodes)
1216                                 lpfc_more_adisc(vport);
1217                 }
1218                 return ndlp->nlp_state;
1219         }
1220         ndlp->nlp_prev_state = NLP_STE_ADISC_ISSUE;
1221         lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0);
1222         lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
1223
1224         return ndlp->nlp_state;
1225 }
1226
1227 static uint32_t
1228 lpfc_rcv_prli_adisc_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1229                           void *arg, uint32_t evt)
1230 {
1231         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1232
1233         lpfc_els_rsp_prli_acc(vport, cmdiocb, ndlp);
1234         return ndlp->nlp_state;
1235 }
1236
1237 static uint32_t
1238 lpfc_rcv_logo_adisc_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1239                           void *arg, uint32_t evt)
1240 {
1241         struct lpfc_hba *phba = vport->phba;
1242         struct lpfc_iocbq *cmdiocb;
1243
1244         cmdiocb = (struct lpfc_iocbq *) arg;
1245
1246         /* software abort outstanding ADISC */
1247         lpfc_els_abort(phba, ndlp);
1248
1249         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_LOGO);
1250         return ndlp->nlp_state;
1251 }
1252
1253 static uint32_t
1254 lpfc_rcv_padisc_adisc_issue(struct lpfc_vport *vport,
1255                             struct lpfc_nodelist *ndlp,
1256                             void *arg, uint32_t evt)
1257 {
1258         struct lpfc_iocbq *cmdiocb;
1259
1260         cmdiocb = (struct lpfc_iocbq *) arg;
1261
1262         lpfc_rcv_padisc(vport, ndlp, cmdiocb);
1263         return ndlp->nlp_state;
1264 }
1265
1266 static uint32_t
1267 lpfc_rcv_prlo_adisc_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1268                           void *arg, uint32_t evt)
1269 {
1270         struct lpfc_iocbq *cmdiocb;
1271
1272         cmdiocb = (struct lpfc_iocbq *) arg;
1273
1274         /* Treat like rcv logo */
1275         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_PRLO);
1276         return ndlp->nlp_state;
1277 }
1278
1279 static uint32_t
1280 lpfc_cmpl_adisc_adisc_issue(struct lpfc_vport *vport,
1281                             struct lpfc_nodelist *ndlp,
1282                             void *arg, uint32_t evt)
1283 {
1284         struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
1285         struct lpfc_hba   *phba = vport->phba;
1286         struct lpfc_iocbq *cmdiocb, *rspiocb;
1287         IOCB_t *irsp;
1288         ADISC *ap;
1289         int rc;
1290
1291         cmdiocb = (struct lpfc_iocbq *) arg;
1292         rspiocb = cmdiocb->context_un.rsp_iocb;
1293
1294         ap = (ADISC *)lpfc_check_elscmpl_iocb(phba, cmdiocb, rspiocb);
1295         irsp = &rspiocb->iocb;
1296
1297         if ((irsp->ulpStatus) ||
1298             (!lpfc_check_adisc(vport, ndlp, &ap->nodeName, &ap->portName))) {
1299                 /* 1 sec timeout */
1300                 mod_timer(&ndlp->nlp_delayfunc, jiffies + HZ);
1301                 spin_lock_irq(shost->host_lock);
1302                 ndlp->nlp_flag |= NLP_DELAY_TMO;
1303                 spin_unlock_irq(shost->host_lock);
1304                 ndlp->nlp_last_elscmd = ELS_CMD_PLOGI;
1305
1306                 memset(&ndlp->nlp_nodename, 0, sizeof(struct lpfc_name));
1307                 memset(&ndlp->nlp_portname, 0, sizeof(struct lpfc_name));
1308
1309                 ndlp->nlp_prev_state = NLP_STE_ADISC_ISSUE;
1310                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1311                 lpfc_unreg_rpi(vport, ndlp);
1312                 return ndlp->nlp_state;
1313         }
1314
1315         if (phba->sli_rev == LPFC_SLI_REV4) {
1316                 rc = lpfc_sli4_resume_rpi(ndlp, NULL, NULL);
1317                 if (rc) {
1318                         /* Stay in state and retry. */
1319                         ndlp->nlp_prev_state = NLP_STE_ADISC_ISSUE;
1320                         return ndlp->nlp_state;
1321                 }
1322         }
1323
1324         if (ndlp->nlp_type & NLP_FCP_TARGET) {
1325                 ndlp->nlp_prev_state = NLP_STE_ADISC_ISSUE;
1326                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_MAPPED_NODE);
1327         } else {
1328                 ndlp->nlp_prev_state = NLP_STE_ADISC_ISSUE;
1329                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
1330         }
1331
1332         return ndlp->nlp_state;
1333 }
1334
1335 static uint32_t
1336 lpfc_device_rm_adisc_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1337                            void *arg, uint32_t evt)
1338 {
1339         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1340
1341         if (ndlp->nlp_flag & NLP_NPR_2B_DISC) {
1342                 spin_lock_irq(shost->host_lock);
1343                 ndlp->nlp_flag |= NLP_NODEV_REMOVE;
1344                 spin_unlock_irq(shost->host_lock);
1345                 return ndlp->nlp_state;
1346         } else {
1347                 /* software abort outstanding ADISC */
1348                 lpfc_els_abort(vport->phba, ndlp);
1349
1350                 lpfc_drop_node(vport, ndlp);
1351                 return NLP_STE_FREED_NODE;
1352         }
1353 }
1354
1355 static uint32_t
1356 lpfc_device_recov_adisc_issue(struct lpfc_vport *vport,
1357                               struct lpfc_nodelist *ndlp,
1358                               void *arg,
1359                               uint32_t evt)
1360 {
1361         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1362         struct lpfc_hba  *phba = vport->phba;
1363
1364         /* Don't do anything that will mess up processing of the
1365          * previous RSCN.
1366          */
1367         if (vport->fc_flag & FC_RSCN_DEFERRED)
1368                 return ndlp->nlp_state;
1369
1370         /* software abort outstanding ADISC */
1371         lpfc_els_abort(phba, ndlp);
1372
1373         ndlp->nlp_prev_state = NLP_STE_ADISC_ISSUE;
1374         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1375         spin_lock_irq(shost->host_lock);
1376         ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
1377         spin_unlock_irq(shost->host_lock);
1378         lpfc_disc_set_adisc(vport, ndlp);
1379         return ndlp->nlp_state;
1380 }
1381
1382 static uint32_t
1383 lpfc_rcv_plogi_reglogin_issue(struct lpfc_vport *vport,
1384                               struct lpfc_nodelist *ndlp,
1385                               void *arg,
1386                               uint32_t evt)
1387 {
1388         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1389
1390         lpfc_rcv_plogi(vport, ndlp, cmdiocb);
1391         return ndlp->nlp_state;
1392 }
1393
1394 static uint32_t
1395 lpfc_rcv_prli_reglogin_issue(struct lpfc_vport *vport,
1396                              struct lpfc_nodelist *ndlp,
1397                              void *arg,
1398                              uint32_t evt)
1399 {
1400         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1401
1402         lpfc_els_rsp_prli_acc(vport, cmdiocb, ndlp);
1403         return ndlp->nlp_state;
1404 }
1405
1406 static uint32_t
1407 lpfc_rcv_logo_reglogin_issue(struct lpfc_vport *vport,
1408                              struct lpfc_nodelist *ndlp,
1409                              void *arg,
1410                              uint32_t evt)
1411 {
1412         struct lpfc_hba   *phba = vport->phba;
1413         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1414         LPFC_MBOXQ_t      *mb;
1415         LPFC_MBOXQ_t      *nextmb;
1416         struct lpfc_dmabuf *mp;
1417
1418         cmdiocb = (struct lpfc_iocbq *) arg;
1419
1420         /* cleanup any ndlp on mbox q waiting for reglogin cmpl */
1421         if ((mb = phba->sli.mbox_active)) {
1422                 if ((mb->u.mb.mbxCommand == MBX_REG_LOGIN64) &&
1423                    (ndlp == (struct lpfc_nodelist *) mb->context2)) {
1424                         lpfc_nlp_put(ndlp);
1425                         mb->context2 = NULL;
1426                         mb->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
1427                 }
1428         }
1429
1430         spin_lock_irq(&phba->hbalock);
1431         list_for_each_entry_safe(mb, nextmb, &phba->sli.mboxq, list) {
1432                 if ((mb->u.mb.mbxCommand == MBX_REG_LOGIN64) &&
1433                    (ndlp == (struct lpfc_nodelist *) mb->context2)) {
1434                         mp = (struct lpfc_dmabuf *) (mb->context1);
1435                         if (mp) {
1436                                 __lpfc_mbuf_free(phba, mp->virt, mp->phys);
1437                                 kfree(mp);
1438                         }
1439                         lpfc_nlp_put(ndlp);
1440                         list_del(&mb->list);
1441                         phba->sli.mboxq_cnt--;
1442                         mempool_free(mb, phba->mbox_mem_pool);
1443                 }
1444         }
1445         spin_unlock_irq(&phba->hbalock);
1446
1447         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_LOGO);
1448         return ndlp->nlp_state;
1449 }
1450
1451 static uint32_t
1452 lpfc_rcv_padisc_reglogin_issue(struct lpfc_vport *vport,
1453                                struct lpfc_nodelist *ndlp,
1454                                void *arg,
1455                                uint32_t evt)
1456 {
1457         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1458
1459         lpfc_rcv_padisc(vport, ndlp, cmdiocb);
1460         return ndlp->nlp_state;
1461 }
1462
1463 static uint32_t
1464 lpfc_rcv_prlo_reglogin_issue(struct lpfc_vport *vport,
1465                              struct lpfc_nodelist *ndlp,
1466                              void *arg,
1467                              uint32_t evt)
1468 {
1469         struct lpfc_iocbq *cmdiocb;
1470
1471         cmdiocb = (struct lpfc_iocbq *) arg;
1472         lpfc_els_rsp_acc(vport, ELS_CMD_PRLO, cmdiocb, ndlp, NULL);
1473         return ndlp->nlp_state;
1474 }
1475
1476 static uint32_t
1477 lpfc_cmpl_reglogin_reglogin_issue(struct lpfc_vport *vport,
1478                                   struct lpfc_nodelist *ndlp,
1479                                   void *arg,
1480                                   uint32_t evt)
1481 {
1482         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1483         LPFC_MBOXQ_t *pmb = (LPFC_MBOXQ_t *) arg;
1484         MAILBOX_t *mb = &pmb->u.mb;
1485         uint32_t did  = mb->un.varWords[1];
1486
1487         if (mb->mbxStatus) {
1488                 /* RegLogin failed */
1489                 lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
1490                                 "0246 RegLogin failed Data: x%x x%x x%x x%x "
1491                                  "x%x\n",
1492                                  did, mb->mbxStatus, vport->port_state,
1493                                  mb->un.varRegLogin.vpi,
1494                                  mb->un.varRegLogin.rpi);
1495                 /*
1496                  * If RegLogin failed due to lack of HBA resources do not
1497                  * retry discovery.
1498                  */
1499                 if (mb->mbxStatus == MBXERR_RPI_FULL) {
1500                         ndlp->nlp_prev_state = NLP_STE_REG_LOGIN_ISSUE;
1501                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1502                         return ndlp->nlp_state;
1503                 }
1504
1505                 /* Put ndlp in npr state set plogi timer for 1 sec */
1506                 mod_timer(&ndlp->nlp_delayfunc, jiffies + HZ * 1);
1507                 spin_lock_irq(shost->host_lock);
1508                 ndlp->nlp_flag |= NLP_DELAY_TMO;
1509                 spin_unlock_irq(shost->host_lock);
1510                 ndlp->nlp_last_elscmd = ELS_CMD_PLOGI;
1511
1512                 lpfc_issue_els_logo(vport, ndlp, 0);
1513                 ndlp->nlp_prev_state = NLP_STE_REG_LOGIN_ISSUE;
1514                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1515                 return ndlp->nlp_state;
1516         }
1517
1518         /* SLI4 ports have preallocated logical rpis. */
1519         if (vport->phba->sli_rev < LPFC_SLI_REV4)
1520                 ndlp->nlp_rpi = mb->un.varWords[0];
1521
1522         ndlp->nlp_flag |= NLP_RPI_REGISTERED;
1523
1524         /* Only if we are not a fabric nport do we issue PRLI */
1525         if (!(ndlp->nlp_type & NLP_FABRIC)) {
1526                 ndlp->nlp_prev_state = NLP_STE_REG_LOGIN_ISSUE;
1527                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_PRLI_ISSUE);
1528                 lpfc_issue_els_prli(vport, ndlp, 0);
1529         } else {
1530                 ndlp->nlp_prev_state = NLP_STE_REG_LOGIN_ISSUE;
1531                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
1532         }
1533         return ndlp->nlp_state;
1534 }
1535
1536 static uint32_t
1537 lpfc_device_rm_reglogin_issue(struct lpfc_vport *vport,
1538                               struct lpfc_nodelist *ndlp,
1539                               void *arg,
1540                               uint32_t evt)
1541 {
1542         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1543
1544         if (ndlp->nlp_flag & NLP_NPR_2B_DISC) {
1545                 spin_lock_irq(shost->host_lock);
1546                 ndlp->nlp_flag |= NLP_NODEV_REMOVE;
1547                 spin_unlock_irq(shost->host_lock);
1548                 return ndlp->nlp_state;
1549         } else {
1550                 lpfc_drop_node(vport, ndlp);
1551                 return NLP_STE_FREED_NODE;
1552         }
1553 }
1554
1555 static uint32_t
1556 lpfc_device_recov_reglogin_issue(struct lpfc_vport *vport,
1557                                  struct lpfc_nodelist *ndlp,
1558                                  void *arg,
1559                                  uint32_t evt)
1560 {
1561         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1562
1563         /* Don't do anything that will mess up processing of the
1564          * previous RSCN.
1565          */
1566         if (vport->fc_flag & FC_RSCN_DEFERRED)
1567                 return ndlp->nlp_state;
1568
1569         ndlp->nlp_prev_state = NLP_STE_REG_LOGIN_ISSUE;
1570         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1571         spin_lock_irq(shost->host_lock);
1572         ndlp->nlp_flag |= NLP_IGNR_REG_CMPL;
1573         ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
1574         spin_unlock_irq(shost->host_lock);
1575         lpfc_disc_set_adisc(vport, ndlp);
1576         return ndlp->nlp_state;
1577 }
1578
1579 static uint32_t
1580 lpfc_rcv_plogi_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1581                           void *arg, uint32_t evt)
1582 {
1583         struct lpfc_iocbq *cmdiocb;
1584
1585         cmdiocb = (struct lpfc_iocbq *) arg;
1586
1587         lpfc_rcv_plogi(vport, ndlp, cmdiocb);
1588         return ndlp->nlp_state;
1589 }
1590
1591 static uint32_t
1592 lpfc_rcv_prli_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1593                          void *arg, uint32_t evt)
1594 {
1595         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1596
1597         lpfc_els_rsp_prli_acc(vport, cmdiocb, ndlp);
1598         return ndlp->nlp_state;
1599 }
1600
1601 static uint32_t
1602 lpfc_rcv_logo_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1603                          void *arg, uint32_t evt)
1604 {
1605         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1606
1607         /* Software abort outstanding PRLI before sending acc */
1608         lpfc_els_abort(vport->phba, ndlp);
1609
1610         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_LOGO);
1611         return ndlp->nlp_state;
1612 }
1613
1614 static uint32_t
1615 lpfc_rcv_padisc_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1616                            void *arg, uint32_t evt)
1617 {
1618         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1619
1620         lpfc_rcv_padisc(vport, ndlp, cmdiocb);
1621         return ndlp->nlp_state;
1622 }
1623
1624 /* This routine is envoked when we rcv a PRLO request from a nport
1625  * we are logged into.  We should send back a PRLO rsp setting the
1626  * appropriate bits.
1627  * NEXT STATE = PRLI_ISSUE
1628  */
1629 static uint32_t
1630 lpfc_rcv_prlo_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1631                          void *arg, uint32_t evt)
1632 {
1633         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1634
1635         lpfc_els_rsp_acc(vport, ELS_CMD_PRLO, cmdiocb, ndlp, NULL);
1636         return ndlp->nlp_state;
1637 }
1638
1639 static uint32_t
1640 lpfc_cmpl_prli_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1641                           void *arg, uint32_t evt)
1642 {
1643         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1644         struct lpfc_iocbq *cmdiocb, *rspiocb;
1645         struct lpfc_hba   *phba = vport->phba;
1646         IOCB_t *irsp;
1647         PRLI *npr;
1648
1649         cmdiocb = (struct lpfc_iocbq *) arg;
1650         rspiocb = cmdiocb->context_un.rsp_iocb;
1651         npr = (PRLI *)lpfc_check_elscmpl_iocb(phba, cmdiocb, rspiocb);
1652
1653         irsp = &rspiocb->iocb;
1654         if (irsp->ulpStatus) {
1655                 if ((vport->port_type == LPFC_NPIV_PORT) &&
1656                     vport->cfg_restrict_login) {
1657                         goto out;
1658                 }
1659                 ndlp->nlp_prev_state = NLP_STE_PRLI_ISSUE;
1660                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
1661                 return ndlp->nlp_state;
1662         }
1663
1664         /* Check out PRLI rsp */
1665         ndlp->nlp_type &= ~(NLP_FCP_TARGET | NLP_FCP_INITIATOR);
1666         ndlp->nlp_fcp_info &= ~NLP_FCP_2_DEVICE;
1667         if ((npr->acceptRspCode == PRLI_REQ_EXECUTED) &&
1668             (npr->prliType == PRLI_FCP_TYPE)) {
1669                 if (npr->initiatorFunc)
1670                         ndlp->nlp_type |= NLP_FCP_INITIATOR;
1671                 if (npr->targetFunc)
1672                         ndlp->nlp_type |= NLP_FCP_TARGET;
1673                 if (npr->Retry)
1674                         ndlp->nlp_fcp_info |= NLP_FCP_2_DEVICE;
1675         }
1676         if (!(ndlp->nlp_type & NLP_FCP_TARGET) &&
1677             (vport->port_type == LPFC_NPIV_PORT) &&
1678              vport->cfg_restrict_login) {
1679 out:
1680                 spin_lock_irq(shost->host_lock);
1681                 ndlp->nlp_flag |= NLP_TARGET_REMOVE;
1682                 spin_unlock_irq(shost->host_lock);
1683                 lpfc_issue_els_logo(vport, ndlp, 0);
1684
1685                 ndlp->nlp_prev_state = NLP_STE_PRLI_ISSUE;
1686                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1687                 return ndlp->nlp_state;
1688         }
1689
1690         ndlp->nlp_prev_state = NLP_STE_PRLI_ISSUE;
1691         if (ndlp->nlp_type & NLP_FCP_TARGET)
1692                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_MAPPED_NODE);
1693         else
1694                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
1695         return ndlp->nlp_state;
1696 }
1697
1698 /*! lpfc_device_rm_prli_issue
1699  *
1700  * \pre
1701  * \post
1702  * \param   phba
1703  * \param   ndlp
1704  * \param   arg
1705  * \param   evt
1706  * \return  uint32_t
1707  *
1708  * \b Description:
1709  *    This routine is envoked when we a request to remove a nport we are in the
1710  *    process of PRLIing. We should software abort outstanding prli, unreg
1711  *    login, send a logout. We will change node state to UNUSED_NODE, put it
1712  *    on plogi list so it can be freed when LOGO completes.
1713  *
1714  */
1715
1716 static uint32_t
1717 lpfc_device_rm_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1718                           void *arg, uint32_t evt)
1719 {
1720         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1721
1722         if (ndlp->nlp_flag & NLP_NPR_2B_DISC) {
1723                 spin_lock_irq(shost->host_lock);
1724                 ndlp->nlp_flag |= NLP_NODEV_REMOVE;
1725                 spin_unlock_irq(shost->host_lock);
1726                 return ndlp->nlp_state;
1727         } else {
1728                 /* software abort outstanding PLOGI */
1729                 lpfc_els_abort(vport->phba, ndlp);
1730
1731                 lpfc_drop_node(vport, ndlp);
1732                 return NLP_STE_FREED_NODE;
1733         }
1734 }
1735
1736
1737 /*! lpfc_device_recov_prli_issue
1738  *
1739  * \pre
1740  * \post
1741  * \param   phba
1742  * \param   ndlp
1743  * \param   arg
1744  * \param   evt
1745  * \return  uint32_t
1746  *
1747  * \b Description:
1748  *    The routine is envoked when the state of a device is unknown, like
1749  *    during a link down. We should remove the nodelist entry from the
1750  *    unmapped list, issue a UNREG_LOGIN, do a software abort of the
1751  *    outstanding PRLI command, then free the node entry.
1752  */
1753 static uint32_t
1754 lpfc_device_recov_prli_issue(struct lpfc_vport *vport,
1755                              struct lpfc_nodelist *ndlp,
1756                              void *arg,
1757                              uint32_t evt)
1758 {
1759         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1760         struct lpfc_hba  *phba = vport->phba;
1761
1762         /* Don't do anything that will mess up processing of the
1763          * previous RSCN.
1764          */
1765         if (vport->fc_flag & FC_RSCN_DEFERRED)
1766                 return ndlp->nlp_state;
1767
1768         /* software abort outstanding PRLI */
1769         lpfc_els_abort(phba, ndlp);
1770
1771         ndlp->nlp_prev_state = NLP_STE_PRLI_ISSUE;
1772         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1773         spin_lock_irq(shost->host_lock);
1774         ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
1775         spin_unlock_irq(shost->host_lock);
1776         lpfc_disc_set_adisc(vport, ndlp);
1777         return ndlp->nlp_state;
1778 }
1779
1780 static uint32_t
1781 lpfc_rcv_plogi_unmap_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1782                           void *arg, uint32_t evt)
1783 {
1784         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1785
1786         lpfc_rcv_plogi(vport, ndlp, cmdiocb);
1787         return ndlp->nlp_state;
1788 }
1789
1790 static uint32_t
1791 lpfc_rcv_prli_unmap_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1792                          void *arg, uint32_t evt)
1793 {
1794         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1795
1796         lpfc_rcv_prli(vport, ndlp, cmdiocb);
1797         lpfc_els_rsp_prli_acc(vport, cmdiocb, ndlp);
1798         return ndlp->nlp_state;
1799 }
1800
1801 static uint32_t
1802 lpfc_rcv_logo_unmap_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1803                          void *arg, uint32_t evt)
1804 {
1805         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1806
1807         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_LOGO);
1808         return ndlp->nlp_state;
1809 }
1810
1811 static uint32_t
1812 lpfc_rcv_padisc_unmap_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1813                            void *arg, uint32_t evt)
1814 {
1815         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1816
1817         lpfc_rcv_padisc(vport, ndlp, cmdiocb);
1818         return ndlp->nlp_state;
1819 }
1820
1821 static uint32_t
1822 lpfc_rcv_prlo_unmap_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1823                          void *arg, uint32_t evt)
1824 {
1825         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1826
1827         lpfc_els_rsp_acc(vport, ELS_CMD_PRLO, cmdiocb, ndlp, NULL);
1828         return ndlp->nlp_state;
1829 }
1830
1831 static uint32_t
1832 lpfc_device_recov_unmap_node(struct lpfc_vport *vport,
1833                              struct lpfc_nodelist *ndlp,
1834                              void *arg,
1835                              uint32_t evt)
1836 {
1837         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1838
1839         ndlp->nlp_prev_state = NLP_STE_UNMAPPED_NODE;
1840         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1841         spin_lock_irq(shost->host_lock);
1842         ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
1843         spin_unlock_irq(shost->host_lock);
1844         lpfc_disc_set_adisc(vport, ndlp);
1845
1846         return ndlp->nlp_state;
1847 }
1848
1849 static uint32_t
1850 lpfc_rcv_plogi_mapped_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1851                            void *arg, uint32_t evt)
1852 {
1853         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1854
1855         lpfc_rcv_plogi(vport, ndlp, cmdiocb);
1856         return ndlp->nlp_state;
1857 }
1858
1859 static uint32_t
1860 lpfc_rcv_prli_mapped_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1861                           void *arg, uint32_t evt)
1862 {
1863         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1864
1865         lpfc_els_rsp_prli_acc(vport, cmdiocb, ndlp);
1866         return ndlp->nlp_state;
1867 }
1868
1869 static uint32_t
1870 lpfc_rcv_logo_mapped_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1871                           void *arg, uint32_t evt)
1872 {
1873         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1874
1875         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_LOGO);
1876         return ndlp->nlp_state;
1877 }
1878
1879 static uint32_t
1880 lpfc_rcv_padisc_mapped_node(struct lpfc_vport *vport,
1881                             struct lpfc_nodelist *ndlp,
1882                             void *arg, uint32_t evt)
1883 {
1884         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1885
1886         lpfc_rcv_padisc(vport, ndlp, cmdiocb);
1887         return ndlp->nlp_state;
1888 }
1889
1890 static uint32_t
1891 lpfc_rcv_prlo_mapped_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1892                           void *arg, uint32_t evt)
1893 {
1894         struct lpfc_hba  *phba = vport->phba;
1895         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1896
1897         /* flush the target */
1898         lpfc_sli_abort_iocb(vport, &phba->sli.ring[phba->sli.fcp_ring],
1899                             ndlp->nlp_sid, 0, LPFC_CTX_TGT);
1900
1901         /* Treat like rcv logo */
1902         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_PRLO);
1903         return ndlp->nlp_state;
1904 }
1905
1906 static uint32_t
1907 lpfc_device_recov_mapped_node(struct lpfc_vport *vport,
1908                               struct lpfc_nodelist *ndlp,
1909                               void *arg,
1910                               uint32_t evt)
1911 {
1912         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1913
1914         ndlp->nlp_prev_state = NLP_STE_MAPPED_NODE;
1915         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1916         spin_lock_irq(shost->host_lock);
1917         ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
1918         spin_unlock_irq(shost->host_lock);
1919         lpfc_disc_set_adisc(vport, ndlp);
1920         return ndlp->nlp_state;
1921 }
1922
1923 static uint32_t
1924 lpfc_rcv_plogi_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1925                         void *arg, uint32_t evt)
1926 {
1927         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1928         struct lpfc_iocbq *cmdiocb  = (struct lpfc_iocbq *) arg;
1929
1930         /* Ignore PLOGI if we have an outstanding LOGO */
1931         if (ndlp->nlp_flag & (NLP_LOGO_SND | NLP_LOGO_ACC))
1932                 return ndlp->nlp_state;
1933         if (lpfc_rcv_plogi(vport, ndlp, cmdiocb)) {
1934                 lpfc_cancel_retry_delay_tmo(vport, ndlp);
1935                 spin_lock_irq(shost->host_lock);
1936                 ndlp->nlp_flag &= ~(NLP_NPR_ADISC | NLP_NPR_2B_DISC);
1937                 spin_unlock_irq(shost->host_lock);
1938         } else if (!(ndlp->nlp_flag & NLP_NPR_2B_DISC)) {
1939                 /* send PLOGI immediately, move to PLOGI issue state */
1940                 if (!(ndlp->nlp_flag & NLP_DELAY_TMO)) {
1941                         ndlp->nlp_prev_state = NLP_STE_NPR_NODE;
1942                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
1943                         lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0);
1944                 }
1945         }
1946         return ndlp->nlp_state;
1947 }
1948
1949 static uint32_t
1950 lpfc_rcv_prli_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1951                        void *arg, uint32_t evt)
1952 {
1953         struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
1954         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1955         struct ls_rjt     stat;
1956
1957         memset(&stat, 0, sizeof (struct ls_rjt));
1958         stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
1959         stat.un.b.lsRjtRsnCodeExp = LSEXP_NOTHING_MORE;
1960         lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
1961
1962         if (!(ndlp->nlp_flag & NLP_DELAY_TMO)) {
1963                 if (ndlp->nlp_flag & NLP_NPR_ADISC) {
1964                         spin_lock_irq(shost->host_lock);
1965                         ndlp->nlp_flag &= ~NLP_NPR_ADISC;
1966                         ndlp->nlp_prev_state = NLP_STE_NPR_NODE;
1967                         spin_unlock_irq(shost->host_lock);
1968                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_ADISC_ISSUE);
1969                         lpfc_issue_els_adisc(vport, ndlp, 0);
1970                 } else {
1971                         ndlp->nlp_prev_state = NLP_STE_NPR_NODE;
1972                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
1973                         lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0);
1974                 }
1975         }
1976         return ndlp->nlp_state;
1977 }
1978
1979 static uint32_t
1980 lpfc_rcv_logo_npr_node(struct lpfc_vport *vport,  struct lpfc_nodelist *ndlp,
1981                        void *arg, uint32_t evt)
1982 {
1983         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1984
1985         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_LOGO);
1986         return ndlp->nlp_state;
1987 }
1988
1989 static uint32_t
1990 lpfc_rcv_padisc_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1991                          void *arg, uint32_t evt)
1992 {
1993         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1994
1995         lpfc_rcv_padisc(vport, ndlp, cmdiocb);
1996         /*
1997          * Do not start discovery if discovery is about to start
1998          * or discovery in progress for this node. Starting discovery
1999          * here will affect the counting of discovery threads.
2000          */
2001         if (!(ndlp->nlp_flag & NLP_DELAY_TMO) &&
2002             !(ndlp->nlp_flag & NLP_NPR_2B_DISC)) {
2003                 if (ndlp->nlp_flag & NLP_NPR_ADISC) {
2004                         ndlp->nlp_flag &= ~NLP_NPR_ADISC;
2005                         ndlp->nlp_prev_state = NLP_STE_NPR_NODE;
2006                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_ADISC_ISSUE);
2007                         lpfc_issue_els_adisc(vport, ndlp, 0);
2008                 } else {
2009                         ndlp->nlp_prev_state = NLP_STE_NPR_NODE;
2010                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
2011                         lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0);
2012                 }
2013         }
2014         return ndlp->nlp_state;
2015 }
2016
2017 static uint32_t
2018 lpfc_rcv_prlo_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
2019                        void *arg, uint32_t evt)
2020 {
2021         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
2022         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
2023
2024         spin_lock_irq(shost->host_lock);
2025         ndlp->nlp_flag |= NLP_LOGO_ACC;
2026         spin_unlock_irq(shost->host_lock);
2027
2028         lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
2029
2030         if ((ndlp->nlp_flag & NLP_DELAY_TMO) == 0) {
2031                 mod_timer(&ndlp->nlp_delayfunc, jiffies + HZ * 1);
2032                 spin_lock_irq(shost->host_lock);
2033                 ndlp->nlp_flag |= NLP_DELAY_TMO;
2034                 ndlp->nlp_flag &= ~NLP_NPR_ADISC;
2035                 spin_unlock_irq(shost->host_lock);
2036                 ndlp->nlp_last_elscmd = ELS_CMD_PLOGI;
2037         } else {
2038                 spin_lock_irq(shost->host_lock);
2039                 ndlp->nlp_flag &= ~NLP_NPR_ADISC;
2040                 spin_unlock_irq(shost->host_lock);
2041         }
2042         return ndlp->nlp_state;
2043 }
2044
2045 static uint32_t
2046 lpfc_cmpl_plogi_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
2047                          void *arg, uint32_t evt)
2048 {
2049         struct lpfc_iocbq *cmdiocb, *rspiocb;
2050         IOCB_t *irsp;
2051
2052         cmdiocb = (struct lpfc_iocbq *) arg;
2053         rspiocb = cmdiocb->context_un.rsp_iocb;
2054
2055         irsp = &rspiocb->iocb;
2056         if (irsp->ulpStatus) {
2057                 ndlp->nlp_flag |= NLP_DEFER_RM;
2058                 return NLP_STE_FREED_NODE;
2059         }
2060         return ndlp->nlp_state;
2061 }
2062
2063 static uint32_t
2064 lpfc_cmpl_prli_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
2065                         void *arg, uint32_t evt)
2066 {
2067         struct lpfc_iocbq *cmdiocb, *rspiocb;
2068         IOCB_t *irsp;
2069
2070         cmdiocb = (struct lpfc_iocbq *) arg;
2071         rspiocb = cmdiocb->context_un.rsp_iocb;
2072
2073         irsp = &rspiocb->iocb;
2074         if (irsp->ulpStatus && (ndlp->nlp_flag & NLP_NODEV_REMOVE)) {
2075                 lpfc_drop_node(vport, ndlp);
2076                 return NLP_STE_FREED_NODE;
2077         }
2078         return ndlp->nlp_state;
2079 }
2080
2081 static uint32_t
2082 lpfc_cmpl_logo_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
2083                         void *arg, uint32_t evt)
2084 {
2085         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
2086         if (ndlp->nlp_DID == Fabric_DID) {
2087                 spin_lock_irq(shost->host_lock);
2088                 vport->fc_flag &= ~(FC_FABRIC | FC_PUBLIC_LOOP);
2089                 spin_unlock_irq(shost->host_lock);
2090         }
2091         lpfc_unreg_rpi(vport, ndlp);
2092         return ndlp->nlp_state;
2093 }
2094
2095 static uint32_t
2096 lpfc_cmpl_adisc_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
2097                          void *arg, uint32_t evt)
2098 {
2099         struct lpfc_iocbq *cmdiocb, *rspiocb;
2100         IOCB_t *irsp;
2101
2102         cmdiocb = (struct lpfc_iocbq *) arg;
2103         rspiocb = cmdiocb->context_un.rsp_iocb;
2104
2105         irsp = &rspiocb->iocb;
2106         if (irsp->ulpStatus && (ndlp->nlp_flag & NLP_NODEV_REMOVE)) {
2107                 lpfc_drop_node(vport, ndlp);
2108                 return NLP_STE_FREED_NODE;
2109         }
2110         return ndlp->nlp_state;
2111 }
2112
2113 static uint32_t
2114 lpfc_cmpl_reglogin_npr_node(struct lpfc_vport *vport,
2115                             struct lpfc_nodelist *ndlp,
2116                             void *arg, uint32_t evt)
2117 {
2118         LPFC_MBOXQ_t *pmb = (LPFC_MBOXQ_t *) arg;
2119         MAILBOX_t    *mb = &pmb->u.mb;
2120
2121         if (!mb->mbxStatus) {
2122                 /* SLI4 ports have preallocated logical rpis. */
2123                 if (vport->phba->sli_rev < LPFC_SLI_REV4)
2124                         ndlp->nlp_rpi = mb->un.varWords[0];
2125                 ndlp->nlp_flag |= NLP_RPI_REGISTERED;
2126         } else {
2127                 if (ndlp->nlp_flag & NLP_NODEV_REMOVE) {
2128                         lpfc_drop_node(vport, ndlp);
2129                         return NLP_STE_FREED_NODE;
2130                 }
2131         }
2132         return ndlp->nlp_state;
2133 }
2134
2135 static uint32_t
2136 lpfc_device_rm_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
2137                         void *arg, uint32_t evt)
2138 {
2139         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
2140
2141         if (ndlp->nlp_flag & NLP_NPR_2B_DISC) {
2142                 spin_lock_irq(shost->host_lock);
2143                 ndlp->nlp_flag |= NLP_NODEV_REMOVE;
2144                 spin_unlock_irq(shost->host_lock);
2145                 return ndlp->nlp_state;
2146         }
2147         lpfc_drop_node(vport, ndlp);
2148         return NLP_STE_FREED_NODE;
2149 }
2150
2151 static uint32_t
2152 lpfc_device_recov_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
2153                            void *arg, uint32_t evt)
2154 {
2155         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
2156
2157         /* Don't do anything that will mess up processing of the
2158          * previous RSCN.
2159          */
2160         if (vport->fc_flag & FC_RSCN_DEFERRED)
2161                 return ndlp->nlp_state;
2162
2163         lpfc_cancel_retry_delay_tmo(vport, ndlp);
2164         spin_lock_irq(shost->host_lock);
2165         ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
2166         spin_unlock_irq(shost->host_lock);
2167         return ndlp->nlp_state;
2168 }
2169
2170
2171 /* This next section defines the NPort Discovery State Machine */
2172
2173 /* There are 4 different double linked lists nodelist entries can reside on.
2174  * The plogi list and adisc list are used when Link Up discovery or RSCN
2175  * processing is needed. Each list holds the nodes that we will send PLOGI
2176  * or ADISC on. These lists will keep track of what nodes will be effected
2177  * by an RSCN, or a Link Up (Typically, all nodes are effected on Link Up).
2178  * The unmapped_list will contain all nodes that we have successfully logged
2179  * into at the Fibre Channel level. The mapped_list will contain all nodes
2180  * that are mapped FCP targets.
2181  */
2182 /*
2183  * The bind list is a list of undiscovered (potentially non-existent) nodes
2184  * that we have saved binding information on. This information is used when
2185  * nodes transition from the unmapped to the mapped list.
2186  */
2187 /* For UNUSED_NODE state, the node has just been allocated .
2188  * For PLOGI_ISSUE and REG_LOGIN_ISSUE, the node is on
2189  * the PLOGI list. For REG_LOGIN_COMPL, the node is taken off the PLOGI list
2190  * and put on the unmapped list. For ADISC processing, the node is taken off
2191  * the ADISC list and placed on either the mapped or unmapped list (depending
2192  * on its previous state). Once on the unmapped list, a PRLI is issued and the
2193  * state changed to PRLI_ISSUE. When the PRLI completion occurs, the state is
2194  * changed to UNMAPPED_NODE. If the completion indicates a mapped
2195  * node, the node is taken off the unmapped list. The binding list is checked
2196  * for a valid binding, or a binding is automatically assigned. If binding
2197  * assignment is unsuccessful, the node is left on the unmapped list. If
2198  * binding assignment is successful, the associated binding list entry (if
2199  * any) is removed, and the node is placed on the mapped list.
2200  */
2201 /*
2202  * For a Link Down, all nodes on the ADISC, PLOGI, unmapped or mapped
2203  * lists will receive a DEVICE_RECOVERY event. If the linkdown or devloss timers
2204  * expire, all effected nodes will receive a DEVICE_RM event.
2205  */
2206 /*
2207  * For a Link Up or RSCN, all nodes will move from the mapped / unmapped lists
2208  * to either the ADISC or PLOGI list.  After a Nameserver query or ALPA loopmap
2209  * check, additional nodes may be added or removed (via DEVICE_RM) to / from
2210  * the PLOGI or ADISC lists. Once the PLOGI and ADISC lists are populated,
2211  * we will first process the ADISC list.  32 entries are processed initially and
2212  * ADISC is initited for each one.  Completions / Events for each node are
2213  * funnelled thru the state machine.  As each node finishes ADISC processing, it
2214  * starts ADISC for any nodes waiting for ADISC processing. If no nodes are
2215  * waiting, and the ADISC list count is identically 0, then we are done. For
2216  * Link Up discovery, since all nodes on the PLOGI list are UNREG_LOGIN'ed, we
2217  * can issue a CLEAR_LA and reenable Link Events. Next we will process the PLOGI
2218  * list.  32 entries are processed initially and PLOGI is initited for each one.
2219  * Completions / Events for each node are funnelled thru the state machine.  As
2220  * each node finishes PLOGI processing, it starts PLOGI for any nodes waiting
2221  * for PLOGI processing. If no nodes are waiting, and the PLOGI list count is
2222  * indentically 0, then we are done. We have now completed discovery / RSCN
2223  * handling. Upon completion, ALL nodes should be on either the mapped or
2224  * unmapped lists.
2225  */
2226
2227 static uint32_t (*lpfc_disc_action[NLP_STE_MAX_STATE * NLP_EVT_MAX_EVENT])
2228      (struct lpfc_vport *, struct lpfc_nodelist *, void *, uint32_t) = {
2229         /* Action routine                  Event       Current State  */
2230         lpfc_rcv_plogi_unused_node,     /* RCV_PLOGI   UNUSED_NODE    */
2231         lpfc_rcv_els_unused_node,       /* RCV_PRLI        */
2232         lpfc_rcv_logo_unused_node,      /* RCV_LOGO        */
2233         lpfc_rcv_els_unused_node,       /* RCV_ADISC       */
2234         lpfc_rcv_els_unused_node,       /* RCV_PDISC       */
2235         lpfc_rcv_els_unused_node,       /* RCV_PRLO        */
2236         lpfc_disc_illegal,              /* CMPL_PLOGI      */
2237         lpfc_disc_illegal,              /* CMPL_PRLI       */
2238         lpfc_cmpl_logo_unused_node,     /* CMPL_LOGO       */
2239         lpfc_disc_illegal,              /* CMPL_ADISC      */
2240         lpfc_disc_illegal,              /* CMPL_REG_LOGIN  */
2241         lpfc_device_rm_unused_node,     /* DEVICE_RM       */
2242         lpfc_device_recov_unused_node,  /* DEVICE_RECOVERY */
2243
2244         lpfc_rcv_plogi_plogi_issue,     /* RCV_PLOGI   PLOGI_ISSUE    */
2245         lpfc_rcv_prli_plogi_issue,      /* RCV_PRLI        */
2246         lpfc_rcv_logo_plogi_issue,      /* RCV_LOGO        */
2247         lpfc_rcv_els_plogi_issue,       /* RCV_ADISC       */
2248         lpfc_rcv_els_plogi_issue,       /* RCV_PDISC       */
2249         lpfc_rcv_els_plogi_issue,       /* RCV_PRLO        */
2250         lpfc_cmpl_plogi_plogi_issue,    /* CMPL_PLOGI      */
2251         lpfc_disc_illegal,              /* CMPL_PRLI       */
2252         lpfc_cmpl_logo_plogi_issue,     /* CMPL_LOGO       */
2253         lpfc_disc_illegal,              /* CMPL_ADISC      */
2254         lpfc_cmpl_reglogin_plogi_issue,/* CMPL_REG_LOGIN  */
2255         lpfc_device_rm_plogi_issue,     /* DEVICE_RM       */
2256         lpfc_device_recov_plogi_issue,  /* DEVICE_RECOVERY */
2257
2258         lpfc_rcv_plogi_adisc_issue,     /* RCV_PLOGI   ADISC_ISSUE    */
2259         lpfc_rcv_prli_adisc_issue,      /* RCV_PRLI        */
2260         lpfc_rcv_logo_adisc_issue,      /* RCV_LOGO        */
2261         lpfc_rcv_padisc_adisc_issue,    /* RCV_ADISC       */
2262         lpfc_rcv_padisc_adisc_issue,    /* RCV_PDISC       */
2263         lpfc_rcv_prlo_adisc_issue,      /* RCV_PRLO        */
2264         lpfc_disc_illegal,              /* CMPL_PLOGI      */
2265         lpfc_disc_illegal,              /* CMPL_PRLI       */
2266         lpfc_disc_illegal,              /* CMPL_LOGO       */
2267         lpfc_cmpl_adisc_adisc_issue,    /* CMPL_ADISC      */
2268         lpfc_disc_illegal,              /* CMPL_REG_LOGIN  */
2269         lpfc_device_rm_adisc_issue,     /* DEVICE_RM       */
2270         lpfc_device_recov_adisc_issue,  /* DEVICE_RECOVERY */
2271
2272         lpfc_rcv_plogi_reglogin_issue,  /* RCV_PLOGI  REG_LOGIN_ISSUE */
2273         lpfc_rcv_prli_reglogin_issue,   /* RCV_PLOGI       */
2274         lpfc_rcv_logo_reglogin_issue,   /* RCV_LOGO        */
2275         lpfc_rcv_padisc_reglogin_issue, /* RCV_ADISC       */
2276         lpfc_rcv_padisc_reglogin_issue, /* RCV_PDISC       */
2277         lpfc_rcv_prlo_reglogin_issue,   /* RCV_PRLO        */
2278         lpfc_cmpl_plogi_illegal,        /* CMPL_PLOGI      */
2279         lpfc_disc_illegal,              /* CMPL_PRLI       */
2280         lpfc_disc_illegal,              /* CMPL_LOGO       */
2281         lpfc_disc_illegal,              /* CMPL_ADISC      */
2282         lpfc_cmpl_reglogin_reglogin_issue,/* CMPL_REG_LOGIN  */
2283         lpfc_device_rm_reglogin_issue,  /* DEVICE_RM       */
2284         lpfc_device_recov_reglogin_issue,/* DEVICE_RECOVERY */
2285
2286         lpfc_rcv_plogi_prli_issue,      /* RCV_PLOGI   PRLI_ISSUE     */
2287         lpfc_rcv_prli_prli_issue,       /* RCV_PRLI        */
2288         lpfc_rcv_logo_prli_issue,       /* RCV_LOGO        */
2289         lpfc_rcv_padisc_prli_issue,     /* RCV_ADISC       */
2290         lpfc_rcv_padisc_prli_issue,     /* RCV_PDISC       */
2291         lpfc_rcv_prlo_prli_issue,       /* RCV_PRLO        */
2292         lpfc_cmpl_plogi_illegal,        /* CMPL_PLOGI      */
2293         lpfc_cmpl_prli_prli_issue,      /* CMPL_PRLI       */
2294         lpfc_disc_illegal,              /* CMPL_LOGO       */
2295         lpfc_disc_illegal,              /* CMPL_ADISC      */
2296         lpfc_disc_illegal,              /* CMPL_REG_LOGIN  */
2297         lpfc_device_rm_prli_issue,      /* DEVICE_RM       */
2298         lpfc_device_recov_prli_issue,   /* DEVICE_RECOVERY */
2299
2300         lpfc_rcv_plogi_unmap_node,      /* RCV_PLOGI   UNMAPPED_NODE  */
2301         lpfc_rcv_prli_unmap_node,       /* RCV_PRLI        */
2302         lpfc_rcv_logo_unmap_node,       /* RCV_LOGO        */
2303         lpfc_rcv_padisc_unmap_node,     /* RCV_ADISC       */
2304         lpfc_rcv_padisc_unmap_node,     /* RCV_PDISC       */
2305         lpfc_rcv_prlo_unmap_node,       /* RCV_PRLO        */
2306         lpfc_disc_illegal,              /* CMPL_PLOGI      */
2307         lpfc_disc_illegal,              /* CMPL_PRLI       */
2308         lpfc_disc_illegal,              /* CMPL_LOGO       */
2309         lpfc_disc_illegal,              /* CMPL_ADISC      */
2310         lpfc_disc_illegal,              /* CMPL_REG_LOGIN  */
2311         lpfc_disc_illegal,              /* DEVICE_RM       */
2312         lpfc_device_recov_unmap_node,   /* DEVICE_RECOVERY */
2313
2314         lpfc_rcv_plogi_mapped_node,     /* RCV_PLOGI   MAPPED_NODE    */
2315         lpfc_rcv_prli_mapped_node,      /* RCV_PRLI        */
2316         lpfc_rcv_logo_mapped_node,      /* RCV_LOGO        */
2317         lpfc_rcv_padisc_mapped_node,    /* RCV_ADISC       */
2318         lpfc_rcv_padisc_mapped_node,    /* RCV_PDISC       */
2319         lpfc_rcv_prlo_mapped_node,      /* RCV_PRLO        */
2320         lpfc_disc_illegal,              /* CMPL_PLOGI      */
2321         lpfc_disc_illegal,              /* CMPL_PRLI       */
2322         lpfc_disc_illegal,              /* CMPL_LOGO       */
2323         lpfc_disc_illegal,              /* CMPL_ADISC      */
2324         lpfc_disc_illegal,              /* CMPL_REG_LOGIN  */
2325         lpfc_disc_illegal,              /* DEVICE_RM       */
2326         lpfc_device_recov_mapped_node,  /* DEVICE_RECOVERY */
2327
2328         lpfc_rcv_plogi_npr_node,        /* RCV_PLOGI   NPR_NODE    */
2329         lpfc_rcv_prli_npr_node,         /* RCV_PRLI        */
2330         lpfc_rcv_logo_npr_node,         /* RCV_LOGO        */
2331         lpfc_rcv_padisc_npr_node,       /* RCV_ADISC       */
2332         lpfc_rcv_padisc_npr_node,       /* RCV_PDISC       */
2333         lpfc_rcv_prlo_npr_node,         /* RCV_PRLO        */
2334         lpfc_cmpl_plogi_npr_node,       /* CMPL_PLOGI      */
2335         lpfc_cmpl_prli_npr_node,        /* CMPL_PRLI       */
2336         lpfc_cmpl_logo_npr_node,        /* CMPL_LOGO       */
2337         lpfc_cmpl_adisc_npr_node,       /* CMPL_ADISC      */
2338         lpfc_cmpl_reglogin_npr_node,    /* CMPL_REG_LOGIN  */
2339         lpfc_device_rm_npr_node,        /* DEVICE_RM       */
2340         lpfc_device_recov_npr_node,     /* DEVICE_RECOVERY */
2341 };
2342
2343 int
2344 lpfc_disc_state_machine(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
2345                         void *arg, uint32_t evt)
2346 {
2347         uint32_t cur_state, rc;
2348         uint32_t(*func) (struct lpfc_vport *, struct lpfc_nodelist *, void *,
2349                          uint32_t);
2350         uint32_t got_ndlp = 0;
2351
2352         if (lpfc_nlp_get(ndlp))
2353                 got_ndlp = 1;
2354
2355         cur_state = ndlp->nlp_state;
2356
2357         /* DSM in event <evt> on NPort <nlp_DID> in state <cur_state> */
2358         lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
2359                          "0211 DSM in event x%x on NPort x%x in "
2360                          "state %d Data: x%x\n",
2361                          evt, ndlp->nlp_DID, cur_state, ndlp->nlp_flag);
2362
2363         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_DSM,
2364                  "DSM in:          evt:%d ste:%d did:x%x",
2365                 evt, cur_state, ndlp->nlp_DID);
2366
2367         func = lpfc_disc_action[(cur_state * NLP_EVT_MAX_EVENT) + evt];
2368         rc = (func) (vport, ndlp, arg, evt);
2369
2370         /* DSM out state <rc> on NPort <nlp_DID> */
2371         if (got_ndlp) {
2372                 lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
2373                          "0212 DSM out state %d on NPort x%x Data: x%x\n",
2374                          rc, ndlp->nlp_DID, ndlp->nlp_flag);
2375
2376                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_DSM,
2377                         "DSM out:         ste:%d did:x%x flg:x%x",
2378                         rc, ndlp->nlp_DID, ndlp->nlp_flag);
2379                 /* Decrement the ndlp reference count held for this function */
2380                 lpfc_nlp_put(ndlp);
2381         } else {
2382                 lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
2383                         "0213 DSM out state %d on NPort free\n", rc);
2384
2385                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_DSM,
2386                         "DSM out:         ste:%d did:x%x flg:x%x",
2387                         rc, 0, 0);
2388         }
2389
2390         return rc;
2391 }