drivers/scsi/lpfc/lpfc_nportdisc.c

   1  /*******************************************************************
   2  * This file is part of the Emulex Linux Device Driver for         *
   3  * Fibre Channel Host Bus Adapters.                                *
   4  * Copyright (C) 2004-2009 Emulex.  All rights reserved.           *
   5  * EMULEX and SLI are trademarks of Emulex.                        *
   6  * www.emulex.com                                                  *
   7  * Portions Copyright (C) 2004-2005 Christoph Hellwig              *
   8  *                                                                 *
   9  * This program is free software; you can redistribute it and/or   *
  10  * modify it under the terms of version 2 of the GNU General       *
  11  * Public License as published by the Free Software Foundation.    *
  12  * This program is distributed in the hope that it will be useful. *
  13  * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND          *
  14  * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,  *
  15  * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE      *
  16  * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
  17  * TO BE LEGALLY INVALID.  See the GNU General Public License for  *
  18  * more details, a copy of which can be found in the file COPYING  *
  19  * included with this package.                                     *
  20  *******************************************************************/
  21
  22 #include <linux/blkdev.h>
  23 #include <linux/pci.h>
  24 #include <linux/slab.h>
  25 #include <linux/interrupt.h>
  26
  27 #include <scsi/scsi.h>
  28 #include <scsi/scsi_device.h>
  29 #include <scsi/scsi_host.h>
  30 #include <scsi/scsi_transport_fc.h>
  31
  32 #include "lpfc_hw4.h"
  33 #include "lpfc_hw.h"
  34 #include "lpfc_sli.h"
  35 #include "lpfc_sli4.h"
  36 #include "lpfc_nl.h"
  37 #include "lpfc_disc.h"
  38 #include "lpfc_scsi.h"
  39 #include "lpfc.h"
  40 #include "lpfc_logmsg.h"
  41 #include "lpfc_crtn.h"
  42 #include "lpfc_vport.h"
  43 #include "lpfc_debugfs.h"
  44
  45
  46 /* Called to verify a rcv'ed ADISC was intended for us. */
  47 static int
  48 lpfc_check_adisc(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
  49                  struct lpfc_name *nn, struct lpfc_name *pn)
  50 {
  51         /* Compare the ADISC rsp WWNN / WWPN matches our internal node
  52          * table entry for that node.
  53          */
  54         if (memcmp(nn, &ndlp->nlp_nodename, sizeof (struct lpfc_name)))
  55                 return 0;
  56
  57         if (memcmp(pn, &ndlp->nlp_portname, sizeof (struct lpfc_name)))
  58                 return 0;
  59
  60         /* we match, return success */
  61         return 1;
  62 }
  63
  64 int
  65 lpfc_check_sparm(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
  66                  struct serv_parm *sp, uint32_t class, int flogi)
  67 {
  68         volatile struct serv_parm *hsp = &vport->fc_sparam;
  69         uint16_t hsp_value, ssp_value = 0;
  70
  71         /*
  72          * The receive data field size and buffer-to-buffer receive data field
  73          * size entries are 16 bits but are represented as two 8-bit fields in
  74          * the driver data structure to account for rsvd bits and other control
  75          * bits.  Reconstruct and compare the fields as a 16-bit values before
  76          * correcting the byte values.
  77          */
  78         if (sp->cls1.classValid) {
  79                 if (!flogi) {
  80                         hsp_value = ((hsp->cls1.rcvDataSizeMsb << 8) |
  81                                      hsp->cls1.rcvDataSizeLsb);
  82                         ssp_value = ((sp->cls1.rcvDataSizeMsb << 8) |
  83                                      sp->cls1.rcvDataSizeLsb);
  84                         if (!ssp_value)
  85                                 goto bad_service_param;
  86                         if (ssp_value > hsp_value) {
  87                                 sp->cls1.rcvDataSizeLsb =
  88                                         hsp->cls1.rcvDataSizeLsb;
  89                                 sp->cls1.rcvDataSizeMsb =
  90                                         hsp->cls1.rcvDataSizeMsb;
  91                         }
  92                 }
  93         } else if (class == CLASS1)
  94                 goto bad_service_param;
  95         if (sp->cls2.classValid) {
  96                 if (!flogi) {
  97                         hsp_value = ((hsp->cls2.rcvDataSizeMsb << 8) |
  98                                      hsp->cls2.rcvDataSizeLsb);
  99                         ssp_value = ((sp->cls2.rcvDataSizeMsb << 8) |
 100                                      sp->cls2.rcvDataSizeLsb);
 101                         if (!ssp_value)
 102                                 goto bad_service_param;
 103                         if (ssp_value > hsp_value) {
 104                                 sp->cls2.rcvDataSizeLsb =
 105                                         hsp->cls2.rcvDataSizeLsb;
 106                                 sp->cls2.rcvDataSizeMsb =
 107                                         hsp->cls2.rcvDataSizeMsb;
 108                         }
 109                 }
 110         } else if (class == CLASS2)
 111                 goto bad_service_param;
 112         if (sp->cls3.classValid) {
 113                 if (!flogi) {
 114                         hsp_value = ((hsp->cls3.rcvDataSizeMsb << 8) |
 115                                      hsp->cls3.rcvDataSizeLsb);
 116                         ssp_value = ((sp->cls3.rcvDataSizeMsb << 8) |
 117                                      sp->cls3.rcvDataSizeLsb);
 118                         if (!ssp_value)
 119                                 goto bad_service_param;
 120                         if (ssp_value > hsp_value) {
 121                                 sp->cls3.rcvDataSizeLsb =
 122                                         hsp->cls3.rcvDataSizeLsb;
 123                                 sp->cls3.rcvDataSizeMsb =
 124                                         hsp->cls3.rcvDataSizeMsb;
 125                         }
 126                 }
 127         } else if (class == CLASS3)
 128                 goto bad_service_param;
 129
 130         /*
 131          * Preserve the upper four bits of the MSB from the PLOGI response.
 132          * These bits contain the Buffer-to-Buffer State Change Number
 133          * from the target and need to be passed to the FW.
 134          */
 135         hsp_value = (hsp->cmn.bbRcvSizeMsb << 8) | hsp->cmn.bbRcvSizeLsb;
 136         ssp_value = (sp->cmn.bbRcvSizeMsb << 8) | sp->cmn.bbRcvSizeLsb;
 137         if (ssp_value > hsp_value) {
 138                 sp->cmn.bbRcvSizeLsb = hsp->cmn.bbRcvSizeLsb;
 139                 sp->cmn.bbRcvSizeMsb = (sp->cmn.bbRcvSizeMsb & 0xF0) |
 140                                        (hsp->cmn.bbRcvSizeMsb & 0x0F);
 141         }
 142
 143         memcpy(&ndlp->nlp_nodename, &sp->nodeName, sizeof (struct lpfc_name));
 144         memcpy(&ndlp->nlp_portname, &sp->portName, sizeof (struct lpfc_name));
 145         return 1;
 146 bad_service_param:
 147         lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
 148                          "0207 Device %x "
 149                          "(%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x) sent "
 150                          "invalid service parameters.  Ignoring device.\n",
 151                          ndlp->nlp_DID,
 152                          sp->nodeName.u.wwn[0], sp->nodeName.u.wwn[1],
 153                          sp->nodeName.u.wwn[2], sp->nodeName.u.wwn[3],
 154                          sp->nodeName.u.wwn[4], sp->nodeName.u.wwn[5],
 155                          sp->nodeName.u.wwn[6], sp->nodeName.u.wwn[7]);
 156         return 0;
 157 }
 158
 159 static void *
 160 lpfc_check_elscmpl_iocb(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
 161                         struct lpfc_iocbq *rspiocb)
 162 {
 163         struct lpfc_dmabuf *pcmd, *prsp;
 164         uint32_t *lp;
 165         void     *ptr = NULL;
 166         IOCB_t   *irsp;
 167
 168         irsp = &rspiocb->iocb;
 169         pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
 170
 171         /* For lpfc_els_abort, context2 could be zero'ed to delay
 172          * freeing associated memory till after ABTS completes.
 173          */
 174         if (pcmd) {
 175                 prsp =  list_get_first(&pcmd->list, struct lpfc_dmabuf,
 176                                        list);
 177                 if (prsp) {
 178                         lp = (uint32_t *) prsp->virt;
 179                         ptr = (void *)((uint8_t *)lp + sizeof(uint32_t));
 180                 }
 181         } else {
 182                 /* Force ulpStatus error since we are returning NULL ptr */
 183                 if (!(irsp->ulpStatus)) {
 184                         irsp->ulpStatus = IOSTAT_LOCAL_REJECT;
 185                         irsp->un.ulpWord[4] = IOERR_SLI_ABORTED;
 186                 }
 187                 ptr = NULL;
 188         }
 189         return ptr;
 190 }
 191
 192
 193
 194 /*
 195  * Free resources / clean up outstanding I/Os
 196  * associated with a LPFC_NODELIST entry. This
 197  * routine effectively results in a "software abort".
 198  */
 199 int
 200 lpfc_els_abort(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
 201 {
 202         LIST_HEAD(completions);
 203         LIST_HEAD(txcmplq_completions);
 204         LIST_HEAD(abort_list);
 205         struct lpfc_sli  *psli = &phba->sli;
 206         struct lpfc_sli_ring *pring = &psli->ring[LPFC_ELS_RING];
 207         struct lpfc_iocbq *iocb, *next_iocb;
 208
 209         /* Abort outstanding I/O on NPort <nlp_DID> */
 210         lpfc_printf_vlog(ndlp->vport, KERN_INFO, LOG_DISCOVERY,
 211                          "2819 Abort outstanding I/O on NPort x%x "
 212                          "Data: x%x x%x x%x\n",
 213                          ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
 214                          ndlp->nlp_rpi);
 215
 216         lpfc_fabric_abort_nport(ndlp);
 217
 218         /* First check the txq */
 219         spin_lock_irq(&phba->hbalock);
 220         list_for_each_entry_safe(iocb, next_iocb, &pring->txq, list) {
 221                 /* Check to see if iocb matches the nport we are looking for */
 222                 if (lpfc_check_sli_ndlp(phba, pring, iocb, ndlp)) {
 223                         /* It matches, so deque and call compl with anp error */
 224                         list_move_tail(&iocb->list, &completions);
 225                         pring->txq_cnt--;
 226                 }
 227         }
 228
 229         /* Next check the txcmplq */
 230         list_splice_init(&pring->txcmplq, &txcmplq_completions);
 231         spin_unlock_irq(&phba->hbalock);
 232
 233         list_for_each_entry_safe(iocb, next_iocb, &txcmplq_completions, list) {
 234                 /* Check to see if iocb matches the nport we are looking for */
 235                 if (lpfc_check_sli_ndlp(phba, pring, iocb, ndlp))
 236                         list_add_tail(&iocb->dlist, &abort_list);
 237         }
 238         spin_lock_irq(&phba->hbalock);
 239         list_splice(&txcmplq_completions, &pring->txcmplq);
 240         spin_unlock_irq(&phba->hbalock);
 241
 242         list_for_each_entry_safe(iocb, next_iocb, &abort_list, dlist) {
 243                         spin_lock_irq(&phba->hbalock);
 244                         list_del_init(&iocb->dlist);
 245                         lpfc_sli_issue_abort_iotag(phba, pring, iocb);
 246                         spin_unlock_irq(&phba->hbalock);
 247         }
 248
 249         /* Cancel all the IOCBs from the completions list */
 250         lpfc_sli_cancel_iocbs(phba, &completions, IOSTAT_LOCAL_REJECT,
 251                               IOERR_SLI_ABORTED);
 252
 253         lpfc_cancel_retry_delay_tmo(phba->pport, ndlp);
 254         return 0;
 255 }
 256
 257 static int
 258 lpfc_rcv_plogi(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 259                struct lpfc_iocbq *cmdiocb)
 260 {
 261         struct Scsi_Host   *shost = lpfc_shost_from_vport(vport);
 262         struct lpfc_hba    *phba = vport->phba;
 263         struct lpfc_dmabuf *pcmd;
 264         uint32_t *lp;
 265         IOCB_t *icmd;
 266         struct serv_parm *sp;
 267         LPFC_MBOXQ_t *mbox;
 268         struct ls_rjt stat;
 269         int rc;
 270
 271         memset(&stat, 0, sizeof (struct ls_rjt));
 272         if (vport->port_state <= LPFC_FDISC) {
 273                 /* Before responding to PLOGI, check for pt2pt mode.
 274                  * If we are pt2pt, with an outstanding FLOGI, abort
 275                  * the FLOGI and resend it first.
 276                  */
 277                 if (vport->fc_flag & FC_PT2PT) {
 278                          lpfc_els_abort_flogi(phba);
 279                         if (!(vport->fc_flag & FC_PT2PT_PLOGI)) {
 280                                 /* If the other side is supposed to initiate
 281                                  * the PLOGI anyway, just ACC it now and
 282                                  * move on with discovery.
 283                                  */
 284                                 phba->fc_edtov = FF_DEF_EDTOV;
 285                                 phba->fc_ratov = FF_DEF_RATOV;
 286                                 /* Start discovery - this should just do
 287                                    CLEAR_LA */
 288                                 lpfc_disc_start(vport);
 289                         } else
 290                                 lpfc_initial_flogi(vport);
 291                 } else {
 292                         stat.un.b.lsRjtRsnCode = LSRJT_LOGICAL_BSY;
 293                         stat.un.b.lsRjtRsnCodeExp = LSEXP_NOTHING_MORE;
 294                         lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb,
 295                                             ndlp, NULL);
 296                         return 0;
 297                 }
 298         }
 299         pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
 300         lp = (uint32_t *) pcmd->virt;
 301         sp = (struct serv_parm *) ((uint8_t *) lp + sizeof (uint32_t));
 302         if (wwn_to_u64(sp->portName.u.wwn) == 0) {
 303                 lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
 304                                  "0140 PLOGI Reject: invalid nname\n");
 305                 stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
 306                 stat.un.b.lsRjtRsnCodeExp = LSEXP_INVALID_PNAME;
 307                 lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp,
 308                         NULL);
 309                 return 0;
 310         }
 311         if (wwn_to_u64(sp->nodeName.u.wwn) == 0) {
 312                 lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
 313                                  "0141 PLOGI Reject: invalid pname\n");
 314                 stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
 315                 stat.un.b.lsRjtRsnCodeExp = LSEXP_INVALID_NNAME;
 316                 lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp,
 317                         NULL);
 318                 return 0;
 319         }
 320         if ((lpfc_check_sparm(vport, ndlp, sp, CLASS3, 0) == 0)) {
 321                 /* Reject this request because invalid parameters */
 322                 stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
 323                 stat.un.b.lsRjtRsnCodeExp = LSEXP_SPARM_OPTIONS;
 324                 lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp,
 325                         NULL);
 326                 return 0;
 327         }
 328         icmd = &cmdiocb->iocb;
 329
 330         /* PLOGI chkparm OK */
 331         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
 332                          "0114 PLOGI chkparm OK Data: x%x x%x x%x x%x\n",
 333                          ndlp->nlp_DID, ndlp->nlp_state, ndlp->nlp_flag,
 334                          ndlp->nlp_rpi);
 335
 336         if (vport->cfg_fcp_class == 2 && sp->cls2.classValid)
 337                 ndlp->nlp_fcp_info |= CLASS2;
 338         else
 339                 ndlp->nlp_fcp_info |= CLASS3;
 340
 341         ndlp->nlp_class_sup = 0;
 342         if (sp->cls1.classValid)
 343                 ndlp->nlp_class_sup |= FC_COS_CLASS1;
 344         if (sp->cls2.classValid)
 345                 ndlp->nlp_class_sup |= FC_COS_CLASS2;
 346         if (sp->cls3.classValid)
 347                 ndlp->nlp_class_sup |= FC_COS_CLASS3;
 348         if (sp->cls4.classValid)
 349                 ndlp->nlp_class_sup |= FC_COS_CLASS4;
 350         ndlp->nlp_maxframe =
 351                 ((sp->cmn.bbRcvSizeMsb & 0x0F) << 8) | sp->cmn.bbRcvSizeLsb;
 352
 353         /* no need to reg_login if we are already in one of these states */
 354         switch (ndlp->nlp_state) {
 355         case  NLP_STE_NPR_NODE:
 356                 if (!(ndlp->nlp_flag & NLP_NPR_ADISC))
 357                         break;
 358         case  NLP_STE_REG_LOGIN_ISSUE:
 359         case  NLP_STE_PRLI_ISSUE:
 360         case  NLP_STE_UNMAPPED_NODE:
 361         case  NLP_STE_MAPPED_NODE:
 362                 lpfc_els_rsp_acc(vport, ELS_CMD_PLOGI, cmdiocb, ndlp, NULL);
 363                 return 1;
 364         }
 365
 366         if ((vport->fc_flag & FC_PT2PT) &&
 367             !(vport->fc_flag & FC_PT2PT_PLOGI)) {
 368                 /* rcv'ed PLOGI decides what our NPortId will be */
 369                 vport->fc_myDID = icmd->un.rcvels.parmRo;
 370                 mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
 371                 if (mbox == NULL)
 372                         goto out;
 373                 lpfc_config_link(phba, mbox);
 374                 mbox->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
 375                 mbox->vport = vport;
 376                 rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
 377                 if (rc == MBX_NOT_FINISHED) {
 378                         mempool_free(mbox, phba->mbox_mem_pool);
 379                         goto out;
 380                 }
 381
 382                 lpfc_can_disctmo(vport);
 383         }
 384         mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
 385         if (!mbox)
 386                 goto out;
 387
 388         rc = lpfc_reg_rpi(phba, vport->vpi, icmd->un.rcvels.remoteID,
 389                             (uint8_t *) sp, mbox, ndlp->nlp_rpi);
 390         if (rc) {
 391                 mempool_free(mbox, phba->mbox_mem_pool);
 392                 goto out;
 393         }
 394
 395         /* ACC PLOGI rsp command needs to execute first,
 396          * queue this mbox command to be processed later.
 397          */
 398         mbox->mbox_cmpl = lpfc_mbx_cmpl_reg_login;
 399         /*
 400          * mbox->context2 = lpfc_nlp_get(ndlp) deferred until mailbox
 401          * command issued in lpfc_cmpl_els_acc().
 402          */
 403         mbox->vport = vport;
 404         spin_lock_irq(shost->host_lock);
 405         ndlp->nlp_flag |= (NLP_ACC_REGLOGIN | NLP_RCV_PLOGI);
 406         spin_unlock_irq(shost->host_lock);
 407
 408         /*
 409          * If there is an outstanding PLOGI issued, abort it before
 410          * sending ACC rsp for received PLOGI. If pending plogi
 411          * is not canceled here, the plogi will be rejected by
 412          * remote port and will be retried. On a configuration with
 413          * single discovery thread, this will cause a huge delay in
 414          * discovery. Also this will cause multiple state machines
 415          * running in parallel for this node.
 416          */
 417         if (ndlp->nlp_state == NLP_STE_PLOGI_ISSUE) {
 418                 /* software abort outstanding PLOGI */
 419                 lpfc_els_abort(phba, ndlp);
 420         }
 421
 422         if ((vport->port_type == LPFC_NPIV_PORT &&
 423              vport->cfg_restrict_login)) {
 424
 425                 /* In order to preserve RPIs, we want to cleanup
 426                  * the default RPI the firmware created to rcv
 427                  * this ELS request. The only way to do this is
 428                  * to register, then unregister the RPI.
 429                  */
 430                 spin_lock_irq(shost->host_lock);
 431                 ndlp->nlp_flag |= NLP_RM_DFLT_RPI;
 432                 spin_unlock_irq(shost->host_lock);
 433                 stat.un.b.lsRjtRsnCode = LSRJT_INVALID_CMD;
 434                 stat.un.b.lsRjtRsnCodeExp = LSEXP_NOTHING_MORE;
 435                 lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb,
 436                         ndlp, mbox);
 437                 return 1;
 438         }
 439         lpfc_els_rsp_acc(vport, ELS_CMD_PLOGI, cmdiocb, ndlp, mbox);
 440         return 1;
 441 out:
 442         stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
 443         stat.un.b.lsRjtRsnCodeExp = LSEXP_OUT_OF_RESOURCE;
 444         lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
 445         return 0;
 446 }
 447
 448 static int
 449 lpfc_rcv_padisc(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 450                 struct lpfc_iocbq *cmdiocb)
 451 {
 452         struct Scsi_Host   *shost = lpfc_shost_from_vport(vport);
 453         struct lpfc_dmabuf *pcmd;
 454         struct serv_parm   *sp;
 455         struct lpfc_name   *pnn, *ppn;
 456         struct ls_rjt stat;
 457         ADISC *ap;
 458         IOCB_t *icmd;
 459         uint32_t *lp;
 460         uint32_t cmd;
 461
 462         pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
 463         lp = (uint32_t *) pcmd->virt;
 464
 465         cmd = *lp++;
 466         if (cmd == ELS_CMD_ADISC) {
 467                 ap = (ADISC *) lp;
 468                 pnn = (struct lpfc_name *) & ap->nodeName;
 469                 ppn = (struct lpfc_name *) & ap->portName;
 470         } else {
 471                 sp = (struct serv_parm *) lp;
 472                 pnn = (struct lpfc_name *) & sp->nodeName;
 473                 ppn = (struct lpfc_name *) & sp->portName;
 474         }
 475
 476         icmd = &cmdiocb->iocb;
 477         if (icmd->ulpStatus == 0 && lpfc_check_adisc(vport, ndlp, pnn, ppn)) {
 478                 if (cmd == ELS_CMD_ADISC) {
 479                         lpfc_els_rsp_adisc_acc(vport, cmdiocb, ndlp);
 480                 } else {
 481                         lpfc_els_rsp_acc(vport, ELS_CMD_PLOGI, cmdiocb, ndlp,
 482                                          NULL);
 483                 }
 484                 return 1;
 485         }
 486         /* Reject this request because invalid parameters */
 487         stat.un.b.lsRjtRsvd0 = 0;
 488         stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
 489         stat.un.b.lsRjtRsnCodeExp = LSEXP_SPARM_OPTIONS;
 490         stat.un.b.vendorUnique = 0;
 491         lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
 492
 493         /* 1 sec timeout */
 494         mod_timer(&ndlp->nlp_delayfunc, jiffies + HZ);
 495
 496         spin_lock_irq(shost->host_lock);
 497         ndlp->nlp_flag |= NLP_DELAY_TMO;
 498         spin_unlock_irq(shost->host_lock);
 499         ndlp->nlp_last_elscmd = ELS_CMD_PLOGI;
 500         ndlp->nlp_prev_state = ndlp->nlp_state;
 501         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
 502         return 0;
 503 }
 504
 505 static int
 506 lpfc_rcv_logo(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 507               struct lpfc_iocbq *cmdiocb, uint32_t els_cmd)
 508 {
 509         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
 510         struct lpfc_hba    *phba = vport->phba;
 511         struct lpfc_vport **vports;
 512         int i, active_vlink_present = 0 ;
 513
 514         /* Put ndlp in NPR state with 1 sec timeout for plogi, ACC logo */
 515         /* Only call LOGO ACC for first LOGO, this avoids sending unnecessary
 516          * PLOGIs during LOGO storms from a device.
 517          */
 518         spin_lock_irq(shost->host_lock);
 519         ndlp->nlp_flag |= NLP_LOGO_ACC;
 520         spin_unlock_irq(shost->host_lock);
 521         if (els_cmd == ELS_CMD_PRLO)
 522                 lpfc_els_rsp_acc(vport, ELS_CMD_PRLO, cmdiocb, ndlp, NULL);
 523         else
 524                 lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
 525         if (ndlp->nlp_DID == Fabric_DID) {
 526                 if (vport->port_state <= LPFC_FDISC)
 527                         goto out;
 528                 lpfc_linkdown_port(vport);
 529                 spin_lock_irq(shost->host_lock);
 530                 vport->fc_flag |= FC_VPORT_LOGO_RCVD;
 531                 spin_unlock_irq(shost->host_lock);
 532                 vports = lpfc_create_vport_work_array(phba);
 533                 if (vports) {
 534                         for (i = 0; i <= phba->max_vports && vports[i] != NULL;
 535                                         i++) {
 536                                 if ((!(vports[i]->fc_flag &
 537                                         FC_VPORT_LOGO_RCVD)) &&
 538                                         (vports[i]->port_state > LPFC_FDISC)) {
 539                                         active_vlink_present = 1;
 540                                         break;
 541                                 }
 542                         }
 543                         lpfc_destroy_vport_work_array(phba, vports);
 544                 }
 545
 546                 if (active_vlink_present) {
 547                         /*
 548                          * If there are other active VLinks present,
 549                          * re-instantiate the Vlink using FDISC.
 550                          */
 551                         mod_timer(&ndlp->nlp_delayfunc, jiffies + HZ);
 552                         spin_lock_irq(shost->host_lock);
 553                         ndlp->nlp_flag |= NLP_DELAY_TMO;
 554                         spin_unlock_irq(shost->host_lock);
 555                         ndlp->nlp_last_elscmd = ELS_CMD_FDISC;
 556                         vport->port_state = LPFC_FDISC;
 557                 } else {
 558                         spin_lock_irq(shost->host_lock);
 559                         phba->pport->fc_flag &= ~FC_LOGO_RCVD_DID_CHNG;
 560                         spin_unlock_irq(shost->host_lock);
 561                         lpfc_retry_pport_discovery(phba);
 562                 }
 563         } else if ((!(ndlp->nlp_type & NLP_FABRIC) &&
 564                 ((ndlp->nlp_type & NLP_FCP_TARGET) ||
 565                 !(ndlp->nlp_type & NLP_FCP_INITIATOR))) ||
 566                 (ndlp->nlp_state == NLP_STE_ADISC_ISSUE)) {
 567                 /* Only try to re-login if this is NOT a Fabric Node */
 568                 mod_timer(&ndlp->nlp_delayfunc, jiffies + HZ * 1);
 569                 spin_lock_irq(shost->host_lock);
 570                 ndlp->nlp_flag |= NLP_DELAY_TMO;
 571                 spin_unlock_irq(shost->host_lock);
 572
 573                 ndlp->nlp_last_elscmd = ELS_CMD_PLOGI;
 574         }
 575 out:
 576         ndlp->nlp_prev_state = ndlp->nlp_state;
 577         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
 578
 579         spin_lock_irq(shost->host_lock);
 580         ndlp->nlp_flag &= ~NLP_NPR_ADISC;
 581         spin_unlock_irq(shost->host_lock);
 582         /* The driver has to wait until the ACC completes before it continues
 583          * processing the LOGO.  The action will resume in
 584          * lpfc_cmpl_els_logo_acc routine. Since part of processing includes an
 585          * unreg_login, the driver waits so the ACC does not get aborted.
 586          */
 587         return 0;
 588 }
 589
 590 static void
 591 lpfc_rcv_prli(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 592               struct lpfc_iocbq *cmdiocb)
 593 {
 594         struct lpfc_dmabuf *pcmd;
 595         uint32_t *lp;
 596         PRLI *npr;
 597         struct fc_rport *rport = ndlp->rport;
 598         u32 roles;
 599
 600         pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
 601         lp = (uint32_t *) pcmd->virt;
 602         npr = (PRLI *) ((uint8_t *) lp + sizeof (uint32_t));
 603
 604         ndlp->nlp_type &= ~(NLP_FCP_TARGET | NLP_FCP_INITIATOR);
 605         ndlp->nlp_fcp_info &= ~NLP_FCP_2_DEVICE;
 606         if (npr->prliType == PRLI_FCP_TYPE) {
 607                 if (npr->initiatorFunc)
 608                         ndlp->nlp_type |= NLP_FCP_INITIATOR;
 609                 if (npr->targetFunc)
 610                         ndlp->nlp_type |= NLP_FCP_TARGET;
 611                 if (npr->Retry)
 612                         ndlp->nlp_fcp_info |= NLP_FCP_2_DEVICE;
 613         }
 614         if (rport) {
 615                 /* We need to update the rport role values */
 616                 roles = FC_RPORT_ROLE_UNKNOWN;
 617                 if (ndlp->nlp_type & NLP_FCP_INITIATOR)
 618                         roles |= FC_RPORT_ROLE_FCP_INITIATOR;
 619                 if (ndlp->nlp_type & NLP_FCP_TARGET)
 620                         roles |= FC_RPORT_ROLE_FCP_TARGET;
 621
 622                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_RPORT,
 623                         "rport rolechg:   role:x%x did:x%x flg:x%x",
 624                         roles, ndlp->nlp_DID, ndlp->nlp_flag);
 625
 626                 fc_remote_port_rolechg(rport, roles);
 627         }
 628 }
 629
 630 static uint32_t
 631 lpfc_disc_set_adisc(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
 632 {
 633         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
 634
 635         if (!(ndlp->nlp_flag & NLP_RPI_REGISTERED)) {
 636                 ndlp->nlp_flag &= ~NLP_NPR_ADISC;
 637                 return 0;
 638         }
 639
 640         if (!(vport->fc_flag & FC_PT2PT)) {
 641                 /* Check config parameter use-adisc or FCP-2 */
 642                 if ((vport->cfg_use_adisc && (vport->fc_flag & FC_RSCN_MODE)) ||
 643                     ((ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) &&
 644                      (ndlp->nlp_type & NLP_FCP_TARGET))) {
 645                         spin_lock_irq(shost->host_lock);
 646                         ndlp->nlp_flag |= NLP_NPR_ADISC;
 647                         spin_unlock_irq(shost->host_lock);
 648                         return 1;
 649                 }
 650         }
 651         ndlp->nlp_flag &= ~NLP_NPR_ADISC;
 652         lpfc_unreg_rpi(vport, ndlp);
 653         return 0;
 654 }
 655
 656 /**
 657  * lpfc_release_rpi - Release a RPI by issuing unreg_login mailbox cmd.
 658  * @phba : Pointer to lpfc_hba structure.
 659  * @vport: Pointer to lpfc_vport structure.
 660  * @rpi  : rpi to be release.
 661  *
 662  * This function will send a unreg_login mailbox command to the firmware
 663  * to release a rpi.
 664  **/
 665 void
 666 lpfc_release_rpi(struct lpfc_hba *phba,
 667                 struct lpfc_vport *vport,
 668                 uint16_t rpi)
 669 {
 670         LPFC_MBOXQ_t *pmb;
 671         int rc;
 672
 673         pmb = (LPFC_MBOXQ_t *) mempool_alloc(phba->mbox_mem_pool,
 674                         GFP_KERNEL);
 675         if (!pmb)
 676                 lpfc_printf_vlog(vport, KERN_ERR, LOG_MBOX,
 677                         "2796 mailbox memory allocation failed \n");
 678         else {
 679                 lpfc_unreg_login(phba, vport->vpi, rpi, pmb);
 680                 pmb->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
 681                 rc = lpfc_sli_issue_mbox(phba, pmb, MBX_NOWAIT);
 682                 if (rc == MBX_NOT_FINISHED)
 683                         mempool_free(pmb, phba->mbox_mem_pool);
 684         }
 685 }
 686
 687 static uint32_t
 688 lpfc_disc_illegal(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 689                   void *arg, uint32_t evt)
 690 {
 691         struct lpfc_hba *phba;
 692         LPFC_MBOXQ_t *pmb = (LPFC_MBOXQ_t *) arg;
 693         MAILBOX_t *mb;
 694         uint16_t rpi;
 695
 696         phba = vport->phba;
 697         /* Release the RPI if reglogin completing */
 698         if (!(phba->pport->load_flag & FC_UNLOADING) &&
 699                 (evt == NLP_EVT_CMPL_REG_LOGIN) &&
 700                 (!pmb->u.mb.mbxStatus)) {
 701                 mb = &pmb->u.mb;
 702                 rpi = pmb->u.mb.un.varWords[0];
 703                 lpfc_release_rpi(phba, vport, rpi);
 704         }
 705         lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
 706                          "0271 Illegal State Transition: node x%x "
 707                          "event x%x, state x%x Data: x%x x%x\n",
 708                          ndlp->nlp_DID, evt, ndlp->nlp_state, ndlp->nlp_rpi,
 709                          ndlp->nlp_flag);
 710         return ndlp->nlp_state;
 711 }
 712
 713 static uint32_t
 714 lpfc_cmpl_plogi_illegal(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 715                   void *arg, uint32_t evt)
 716 {
 717         /* This transition is only legal if we previously
 718          * rcv'ed a PLOGI. Since we don't want 2 discovery threads
 719          * working on the same NPortID, do nothing for this thread
 720          * to stop it.
 721          */
 722         if (!(ndlp->nlp_flag & NLP_RCV_PLOGI)) {
 723                 lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
 724                          "0272 Illegal State Transition: node x%x "
 725                          "event x%x, state x%x Data: x%x x%x\n",
 726                          ndlp->nlp_DID, evt, ndlp->nlp_state, ndlp->nlp_rpi,
 727                          ndlp->nlp_flag);
 728         }
 729         return ndlp->nlp_state;
 730 }
 731
 732 /* Start of Discovery State Machine routines */
 733
 734 static uint32_t
 735 lpfc_rcv_plogi_unused_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 736                            void *arg, uint32_t evt)
 737 {
 738         struct lpfc_iocbq *cmdiocb;
 739
 740         cmdiocb = (struct lpfc_iocbq *) arg;
 741
 742         if (lpfc_rcv_plogi(vport, ndlp, cmdiocb)) {
 743                 return ndlp->nlp_state;
 744         }
 745         return NLP_STE_FREED_NODE;
 746 }
 747
 748 static uint32_t
 749 lpfc_rcv_els_unused_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 750                          void *arg, uint32_t evt)
 751 {
 752         lpfc_issue_els_logo(vport, ndlp, 0);
 753         return ndlp->nlp_state;
 754 }
 755
 756 static uint32_t
 757 lpfc_rcv_logo_unused_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 758                           void *arg, uint32_t evt)
 759 {
 760         struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
 761         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
 762
 763         spin_lock_irq(shost->host_lock);
 764         ndlp->nlp_flag |= NLP_LOGO_ACC;
 765         spin_unlock_irq(shost->host_lock);
 766         lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
 767
 768         return ndlp->nlp_state;
 769 }
 770
 771 static uint32_t
 772 lpfc_cmpl_logo_unused_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 773                            void *arg, uint32_t evt)
 774 {
 775         return NLP_STE_FREED_NODE;
 776 }
 777
 778 static uint32_t
 779 lpfc_device_rm_unused_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 780                            void *arg, uint32_t evt)
 781 {
 782         return NLP_STE_FREED_NODE;
 783 }
 784
 785 static uint32_t
 786 lpfc_rcv_plogi_plogi_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 787                            void *arg, uint32_t evt)
 788 {
 789         struct Scsi_Host   *shost = lpfc_shost_from_vport(vport);
 790         struct lpfc_hba   *phba = vport->phba;
 791         struct lpfc_iocbq *cmdiocb = arg;
 792         struct lpfc_dmabuf *pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
 793         uint32_t *lp = (uint32_t *) pcmd->virt;
 794         struct serv_parm *sp = (struct serv_parm *) (lp + 1);
 795         struct ls_rjt stat;
 796         int port_cmp;
 797
 798         memset(&stat, 0, sizeof (struct ls_rjt));
 799
 800         /* For a PLOGI, we only accept if our portname is less
 801          * than the remote portname.
 802          */
 803         phba->fc_stat.elsLogiCol++;
 804         port_cmp = memcmp(&vport->fc_portname, &sp->portName,
 805                           sizeof(struct lpfc_name));
 806
 807         if (port_cmp >= 0) {
 808                 /* Reject this request because the remote node will accept
 809                    ours */
 810                 stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
 811                 stat.un.b.lsRjtRsnCodeExp = LSEXP_CMD_IN_PROGRESS;
 812                 lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp,
 813                         NULL);
 814         } else {
 815                 if (lpfc_rcv_plogi(vport, ndlp, cmdiocb) &&
 816                     (ndlp->nlp_flag & NLP_NPR_2B_DISC) &&
 817                     (vport->num_disc_nodes)) {
 818                         spin_lock_irq(shost->host_lock);
 819                         ndlp->nlp_flag &= ~NLP_NPR_2B_DISC;
 820                         spin_unlock_irq(shost->host_lock);
 821                         /* Check if there are more PLOGIs to be sent */
 822                         lpfc_more_plogi(vport);
 823                         if (vport->num_disc_nodes == 0) {
 824                                 spin_lock_irq(shost->host_lock);
 825                                 vport->fc_flag &= ~FC_NDISC_ACTIVE;
 826                                 spin_unlock_irq(shost->host_lock);
 827                                 lpfc_can_disctmo(vport);
 828                                 lpfc_end_rscn(vport);
 829                         }
 830                 }
 831         } /* If our portname was less */
 832
 833         return ndlp->nlp_state;
 834 }
 835
 836 static uint32_t
 837 lpfc_rcv_prli_plogi_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 838                           void *arg, uint32_t evt)
 839 {
 840         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
 841         struct ls_rjt     stat;
 842
 843         memset(&stat, 0, sizeof (struct ls_rjt));
 844         stat.un.b.lsRjtRsnCode = LSRJT_LOGICAL_BSY;
 845         stat.un.b.lsRjtRsnCodeExp = LSEXP_NOTHING_MORE;
 846         lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
 847         return ndlp->nlp_state;
 848 }
 849
 850 static uint32_t
 851 lpfc_rcv_logo_plogi_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 852                           void *arg, uint32_t evt)
 853 {
 854         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
 855
 856                                 /* software abort outstanding PLOGI */
 857         lpfc_els_abort(vport->phba, ndlp);
 858
 859         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_LOGO);
 860         return ndlp->nlp_state;
 861 }
 862
 863 static uint32_t
 864 lpfc_rcv_els_plogi_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 865                          void *arg, uint32_t evt)
 866 {
 867         struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
 868         struct lpfc_hba   *phba = vport->phba;
 869         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
 870
 871         /* software abort outstanding PLOGI */
 872         lpfc_els_abort(phba, ndlp);
 873
 874         if (evt == NLP_EVT_RCV_LOGO) {
 875                 lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
 876         } else {
 877                 lpfc_issue_els_logo(vport, ndlp, 0);
 878         }
 879
 880         /* Put ndlp in npr state set plogi timer for 1 sec */
 881         mod_timer(&ndlp->nlp_delayfunc, jiffies + HZ * 1);
 882         spin_lock_irq(shost->host_lock);
 883         ndlp->nlp_flag |= NLP_DELAY_TMO;
 884         spin_unlock_irq(shost->host_lock);
 885         ndlp->nlp_last_elscmd = ELS_CMD_PLOGI;
 886         ndlp->nlp_prev_state = NLP_STE_PLOGI_ISSUE;
 887         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
 888
 889         return ndlp->nlp_state;
 890 }
 891
 892 static uint32_t
 893 lpfc_cmpl_plogi_plogi_issue(struct lpfc_vport *vport,
 894                             struct lpfc_nodelist *ndlp,
 895                             void *arg,
 896                             uint32_t evt)
 897 {
 898         struct lpfc_hba    *phba = vport->phba;
 899         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
 900         struct lpfc_iocbq  *cmdiocb, *rspiocb;
 901         struct lpfc_dmabuf *pcmd, *prsp, *mp;
 902         uint32_t *lp;
 903         IOCB_t *irsp;
 904         struct serv_parm *sp;
 905         LPFC_MBOXQ_t *mbox;
 906
 907         cmdiocb = (struct lpfc_iocbq *) arg;
 908         rspiocb = cmdiocb->context_un.rsp_iocb;
 909
 910         if (ndlp->nlp_flag & NLP_ACC_REGLOGIN) {
 911                 /* Recovery from PLOGI collision logic */
 912                 return ndlp->nlp_state;
 913         }
 914
 915         irsp = &rspiocb->iocb;
 916
 917         if (irsp->ulpStatus)
 918                 goto out;
 919
 920         pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
 921
 922         prsp = list_get_first(&pcmd->list, struct lpfc_dmabuf, list);
 923
 924         lp = (uint32_t *) prsp->virt;
 925         sp = (struct serv_parm *) ((uint8_t *) lp + sizeof (uint32_t));
 926
 927         /* Some switches have FDMI servers returning 0 for WWN */
 928         if ((ndlp->nlp_DID != FDMI_DID) &&
 929                 (wwn_to_u64(sp->portName.u.wwn) == 0 ||
 930                 wwn_to_u64(sp->nodeName.u.wwn) == 0)) {
 931                 lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
 932                                  "0142 PLOGI RSP: Invalid WWN.\n");
 933                 goto out;
 934         }
 935         if (!lpfc_check_sparm(vport, ndlp, sp, CLASS3, 0))
 936                 goto out;
 937         /* PLOGI chkparm OK */
 938         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
 939                          "0121 PLOGI chkparm OK Data: x%x x%x x%x x%x\n",
 940                          ndlp->nlp_DID, ndlp->nlp_state,
 941                          ndlp->nlp_flag, ndlp->nlp_rpi);
 942         if (vport->cfg_fcp_class == 2 && (sp->cls2.classValid))
 943                 ndlp->nlp_fcp_info |= CLASS2;
 944         else
 945                 ndlp->nlp_fcp_info |= CLASS3;
 946
 947         ndlp->nlp_class_sup = 0;
 948         if (sp->cls1.classValid)
 949                 ndlp->nlp_class_sup |= FC_COS_CLASS1;
 950         if (sp->cls2.classValid)
 951                 ndlp->nlp_class_sup |= FC_COS_CLASS2;
 952         if (sp->cls3.classValid)
 953                 ndlp->nlp_class_sup |= FC_COS_CLASS3;
 954         if (sp->cls4.classValid)
 955                 ndlp->nlp_class_sup |= FC_COS_CLASS4;
 956         ndlp->nlp_maxframe =
 957                 ((sp->cmn.bbRcvSizeMsb & 0x0F) << 8) | sp->cmn.bbRcvSizeLsb;
 958
 959         mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
 960         if (!mbox) {
 961                 lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
 962                         "0133 PLOGI: no memory for reg_login "
 963                         "Data: x%x x%x x%x x%x\n",
 964                         ndlp->nlp_DID, ndlp->nlp_state,
 965                         ndlp->nlp_flag, ndlp->nlp_rpi);
 966                 goto out;
 967         }
 968
 969         lpfc_unreg_rpi(vport, ndlp);
 970
 971         if (lpfc_reg_rpi(phba, vport->vpi, irsp->un.elsreq64.remoteID,
 972                          (uint8_t *) sp, mbox, ndlp->nlp_rpi) == 0) {
 973                 switch (ndlp->nlp_DID) {
 974                 case NameServer_DID:
 975                         mbox->mbox_cmpl = lpfc_mbx_cmpl_ns_reg_login;
 976                         break;
 977                 case FDMI_DID:
 978                         mbox->mbox_cmpl = lpfc_mbx_cmpl_fdmi_reg_login;
 979                         break;
 980                 default:
 981                         ndlp->nlp_flag |= NLP_REG_LOGIN_SEND;
 982                         mbox->mbox_cmpl = lpfc_mbx_cmpl_reg_login;
 983                 }
 984                 mbox->context2 = lpfc_nlp_get(ndlp);
 985                 mbox->vport = vport;
 986                 if (lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT)
 987                     != MBX_NOT_FINISHED) {
 988                         lpfc_nlp_set_state(vport, ndlp,
 989                                            NLP_STE_REG_LOGIN_ISSUE);
 990                         return ndlp->nlp_state;
 991                 }
 992                 if (ndlp->nlp_flag & NLP_REG_LOGIN_SEND)
 993                         ndlp->nlp_flag &= ~NLP_REG_LOGIN_SEND;
 994                 /* decrement node reference count to the failed mbox
 995                  * command
 996                  */
 997                 lpfc_nlp_put(ndlp);
 998                 mp = (struct lpfc_dmabuf *) mbox->context1;
 999                 lpfc_mbuf_free(phba, mp->virt, mp->phys);
1000                 kfree(mp);
1001                 mempool_free(mbox, phba->mbox_mem_pool);
1002
1003                 lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
1004                                  "0134 PLOGI: cannot issue reg_login "
1005                                  "Data: x%x x%x x%x x%x\n",
1006                                  ndlp->nlp_DID, ndlp->nlp_state,
1007                                  ndlp->nlp_flag, ndlp->nlp_rpi);
1008         } else {
1009                 mempool_free(mbox, phba->mbox_mem_pool);
1010
1011                 lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
1012                                  "0135 PLOGI: cannot format reg_login "
1013                                  "Data: x%x x%x x%x x%x\n",
1014                                  ndlp->nlp_DID, ndlp->nlp_state,
1015                                  ndlp->nlp_flag, ndlp->nlp_rpi);
1016         }
1017
1018
1019 out:
1020         if (ndlp->nlp_DID == NameServer_DID) {
1021                 lpfc_vport_set_state(vport, FC_VPORT_FAILED);
1022                 lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
1023                                  "0261 Cannot Register NameServer login\n");
1024         }
1025
1026         spin_lock_irq(shost->host_lock);
1027         ndlp->nlp_flag |= NLP_DEFER_RM;
1028         spin_unlock_irq(shost->host_lock);
1029         return NLP_STE_FREED_NODE;
1030 }
1031
1032 static uint32_t
1033 lpfc_cmpl_logo_plogi_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1034                            void *arg, uint32_t evt)
1035 {
1036         return ndlp->nlp_state;
1037 }
1038
1039 static uint32_t
1040 lpfc_cmpl_reglogin_plogi_issue(struct lpfc_vport *vport,
1041         struct lpfc_nodelist *ndlp, void *arg, uint32_t evt)
1042 {
1043         struct lpfc_hba *phba;
1044         LPFC_MBOXQ_t *pmb = (LPFC_MBOXQ_t *) arg;
1045         MAILBOX_t *mb = &pmb->u.mb;
1046         uint16_t rpi;
1047
1048         phba = vport->phba;
1049         /* Release the RPI */
1050         if (!(phba->pport->load_flag & FC_UNLOADING) &&
1051                 !mb->mbxStatus) {
1052                 rpi = pmb->u.mb.un.varWords[0];
1053                 lpfc_release_rpi(phba, vport, rpi);
1054         }
1055         return ndlp->nlp_state;
1056 }
1057
1058 static uint32_t
1059 lpfc_device_rm_plogi_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1060                            void *arg, uint32_t evt)
1061 {
1062         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1063
1064         if (ndlp->nlp_flag & NLP_NPR_2B_DISC) {
1065                 spin_lock_irq(shost->host_lock);
1066                 ndlp->nlp_flag |= NLP_NODEV_REMOVE;
1067                 spin_unlock_irq(shost->host_lock);
1068                 return ndlp->nlp_state;
1069         } else {
1070                 /* software abort outstanding PLOGI */
1071                 lpfc_els_abort(vport->phba, ndlp);
1072
1073                 lpfc_drop_node(vport, ndlp);
1074                 return NLP_STE_FREED_NODE;
1075         }
1076 }
1077
1078 static uint32_t
1079 lpfc_device_recov_plogi_issue(struct lpfc_vport *vport,
1080                               struct lpfc_nodelist *ndlp,
1081                               void *arg,
1082                               uint32_t evt)
1083 {
1084         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1085         struct lpfc_hba  *phba = vport->phba;
1086
1087         /* Don't do anything that will mess up processing of the
1088          * previous RSCN.
1089          */
1090         if (vport->fc_flag & FC_RSCN_DEFERRED)
1091                 return ndlp->nlp_state;
1092
1093         /* software abort outstanding PLOGI */
1094         lpfc_els_abort(phba, ndlp);
1095
1096         ndlp->nlp_prev_state = NLP_STE_PLOGI_ISSUE;
1097         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1098         spin_lock_irq(shost->host_lock);
1099         ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
1100         spin_unlock_irq(shost->host_lock);
1101
1102         return ndlp->nlp_state;
1103 }
1104
1105 static uint32_t
1106 lpfc_rcv_plogi_adisc_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1107                            void *arg, uint32_t evt)
1108 {
1109         struct Scsi_Host   *shost = lpfc_shost_from_vport(vport);
1110         struct lpfc_hba   *phba = vport->phba;
1111         struct lpfc_iocbq *cmdiocb;
1112
1113         /* software abort outstanding ADISC */
1114         lpfc_els_abort(phba, ndlp);
1115
1116         cmdiocb = (struct lpfc_iocbq *) arg;
1117
1118         if (lpfc_rcv_plogi(vport, ndlp, cmdiocb)) {
1119                 if (ndlp->nlp_flag & NLP_NPR_2B_DISC) {
1120                         spin_lock_irq(shost->host_lock);
1121                         ndlp->nlp_flag &= ~NLP_NPR_2B_DISC;
1122                         spin_unlock_irq(shost->host_lock);
1123                         if (vport->num_disc_nodes)
1124                                 lpfc_more_adisc(vport);
1125                 }
1126                 return ndlp->nlp_state;
1127         }
1128         ndlp->nlp_prev_state = NLP_STE_ADISC_ISSUE;
1129         lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0);
1130         lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
1131
1132         return ndlp->nlp_state;
1133 }
1134
1135 static uint32_t
1136 lpfc_rcv_prli_adisc_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1137                           void *arg, uint32_t evt)
1138 {
1139         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1140
1141         lpfc_els_rsp_prli_acc(vport, cmdiocb, ndlp);
1142         return ndlp->nlp_state;
1143 }
1144
1145 static uint32_t
1146 lpfc_rcv_logo_adisc_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1147                           void *arg, uint32_t evt)
1148 {
1149         struct lpfc_hba *phba = vport->phba;
1150         struct lpfc_iocbq *cmdiocb;
1151
1152         cmdiocb = (struct lpfc_iocbq *) arg;
1153
1154         /* software abort outstanding ADISC */
1155         lpfc_els_abort(phba, ndlp);
1156
1157         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_LOGO);
1158         return ndlp->nlp_state;
1159 }
1160
1161 static uint32_t
1162 lpfc_rcv_padisc_adisc_issue(struct lpfc_vport *vport,
1163                             struct lpfc_nodelist *ndlp,
1164                             void *arg, uint32_t evt)
1165 {
1166         struct lpfc_iocbq *cmdiocb;
1167
1168         cmdiocb = (struct lpfc_iocbq *) arg;
1169
1170         lpfc_rcv_padisc(vport, ndlp, cmdiocb);
1171         return ndlp->nlp_state;
1172 }
1173
1174 static uint32_t
1175 lpfc_rcv_prlo_adisc_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1176                           void *arg, uint32_t evt)
1177 {
1178         struct lpfc_iocbq *cmdiocb;
1179
1180         cmdiocb = (struct lpfc_iocbq *) arg;
1181
1182         /* Treat like rcv logo */
1183         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_PRLO);
1184         return ndlp->nlp_state;
1185 }
1186
1187 static uint32_t
1188 lpfc_cmpl_adisc_adisc_issue(struct lpfc_vport *vport,
1189                             struct lpfc_nodelist *ndlp,
1190                             void *arg, uint32_t evt)
1191 {
1192         struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
1193         struct lpfc_hba   *phba = vport->phba;
1194         struct lpfc_iocbq *cmdiocb, *rspiocb;
1195         IOCB_t *irsp;
1196         ADISC *ap;
1197         int rc;
1198
1199         cmdiocb = (struct lpfc_iocbq *) arg;
1200         rspiocb = cmdiocb->context_un.rsp_iocb;
1201
1202         ap = (ADISC *)lpfc_check_elscmpl_iocb(phba, cmdiocb, rspiocb);
1203         irsp = &rspiocb->iocb;
1204
1205         if ((irsp->ulpStatus) ||
1206             (!lpfc_check_adisc(vport, ndlp, &ap->nodeName, &ap->portName))) {
1207                 /* 1 sec timeout */
1208                 mod_timer(&ndlp->nlp_delayfunc, jiffies + HZ);
1209                 spin_lock_irq(shost->host_lock);
1210                 ndlp->nlp_flag |= NLP_DELAY_TMO;
1211                 spin_unlock_irq(shost->host_lock);
1212                 ndlp->nlp_last_elscmd = ELS_CMD_PLOGI;
1213
1214                 memset(&ndlp->nlp_nodename, 0, sizeof(struct lpfc_name));
1215                 memset(&ndlp->nlp_portname, 0, sizeof(struct lpfc_name));
1216
1217                 ndlp->nlp_prev_state = NLP_STE_ADISC_ISSUE;
1218                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1219                 lpfc_unreg_rpi(vport, ndlp);
1220                 return ndlp->nlp_state;
1221         }
1222
1223         if (phba->sli_rev == LPFC_SLI_REV4) {
1224                 rc = lpfc_sli4_resume_rpi(ndlp);
1225                 if (rc) {
1226                         /* Stay in state and retry. */
1227                         ndlp->nlp_prev_state = NLP_STE_ADISC_ISSUE;
1228                         return ndlp->nlp_state;
1229                 }
1230         }
1231
1232         if (ndlp->nlp_type & NLP_FCP_TARGET) {
1233                 ndlp->nlp_prev_state = NLP_STE_ADISC_ISSUE;
1234                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_MAPPED_NODE);
1235         } else {
1236                 ndlp->nlp_prev_state = NLP_STE_ADISC_ISSUE;
1237                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
1238         }
1239
1240         return ndlp->nlp_state;
1241 }
1242
1243 static uint32_t
1244 lpfc_device_rm_adisc_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1245                            void *arg, uint32_t evt)
1246 {
1247         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1248
1249         if (ndlp->nlp_flag & NLP_NPR_2B_DISC) {
1250                 spin_lock_irq(shost->host_lock);
1251                 ndlp->nlp_flag |= NLP_NODEV_REMOVE;
1252                 spin_unlock_irq(shost->host_lock);
1253                 return ndlp->nlp_state;
1254         } else {
1255                 /* software abort outstanding ADISC */
1256                 lpfc_els_abort(vport->phba, ndlp);
1257
1258                 lpfc_drop_node(vport, ndlp);
1259                 return NLP_STE_FREED_NODE;
1260         }
1261 }
1262
1263 static uint32_t
1264 lpfc_device_recov_adisc_issue(struct lpfc_vport *vport,
1265                               struct lpfc_nodelist *ndlp,
1266                               void *arg,
1267                               uint32_t evt)
1268 {
1269         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1270         struct lpfc_hba  *phba = vport->phba;
1271
1272         /* Don't do anything that will mess up processing of the
1273          * previous RSCN.
1274          */
1275         if (vport->fc_flag & FC_RSCN_DEFERRED)
1276                 return ndlp->nlp_state;
1277
1278         /* software abort outstanding ADISC */
1279         lpfc_els_abort(phba, ndlp);
1280
1281         ndlp->nlp_prev_state = NLP_STE_ADISC_ISSUE;
1282         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1283         spin_lock_irq(shost->host_lock);
1284         ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
1285         spin_unlock_irq(shost->host_lock);
1286         lpfc_disc_set_adisc(vport, ndlp);
1287         return ndlp->nlp_state;
1288 }
1289
1290 static uint32_t
1291 lpfc_rcv_plogi_reglogin_issue(struct lpfc_vport *vport,
1292                               struct lpfc_nodelist *ndlp,
1293                               void *arg,
1294                               uint32_t evt)
1295 {
1296         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1297
1298         lpfc_rcv_plogi(vport, ndlp, cmdiocb);
1299         return ndlp->nlp_state;
1300 }
1301
1302 static uint32_t
1303 lpfc_rcv_prli_reglogin_issue(struct lpfc_vport *vport,
1304                              struct lpfc_nodelist *ndlp,
1305                              void *arg,
1306                              uint32_t evt)
1307 {
1308         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1309
1310         lpfc_els_rsp_prli_acc(vport, cmdiocb, ndlp);
1311         return ndlp->nlp_state;
1312 }
1313
1314 static uint32_t
1315 lpfc_rcv_logo_reglogin_issue(struct lpfc_vport *vport,
1316                              struct lpfc_nodelist *ndlp,
1317                              void *arg,
1318                              uint32_t evt)
1319 {
1320         struct lpfc_hba   *phba = vport->phba;
1321         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1322         LPFC_MBOXQ_t      *mb;
1323         LPFC_MBOXQ_t      *nextmb;
1324         struct lpfc_dmabuf *mp;
1325
1326         cmdiocb = (struct lpfc_iocbq *) arg;
1327
1328         /* cleanup any ndlp on mbox q waiting for reglogin cmpl */
1329         if ((mb = phba->sli.mbox_active)) {
1330                 if ((mb->u.mb.mbxCommand == MBX_REG_LOGIN64) &&
1331                    (ndlp == (struct lpfc_nodelist *) mb->context2)) {
1332                         lpfc_nlp_put(ndlp);
1333                         mb->context2 = NULL;
1334                         mb->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
1335                 }
1336         }
1337
1338         spin_lock_irq(&phba->hbalock);
1339         list_for_each_entry_safe(mb, nextmb, &phba->sli.mboxq, list) {
1340                 if ((mb->u.mb.mbxCommand == MBX_REG_LOGIN64) &&
1341                    (ndlp == (struct lpfc_nodelist *) mb->context2)) {
1342                         mp = (struct lpfc_dmabuf *) (mb->context1);
1343                         if (mp) {
1344                                 __lpfc_mbuf_free(phba, mp->virt, mp->phys);
1345                                 kfree(mp);
1346                         }
1347                         lpfc_nlp_put(ndlp);
1348                         list_del(&mb->list);
1349                         phba->sli.mboxq_cnt--;
1350                         mempool_free(mb, phba->mbox_mem_pool);
1351                 }
1352         }
1353         spin_unlock_irq(&phba->hbalock);
1354
1355         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_LOGO);
1356         return ndlp->nlp_state;
1357 }
1358
1359 static uint32_t
1360 lpfc_rcv_padisc_reglogin_issue(struct lpfc_vport *vport,
1361                                struct lpfc_nodelist *ndlp,
1362                                void *arg,
1363                                uint32_t evt)
1364 {
1365         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1366
1367         lpfc_rcv_padisc(vport, ndlp, cmdiocb);
1368         return ndlp->nlp_state;
1369 }
1370
1371 static uint32_t
1372 lpfc_rcv_prlo_reglogin_issue(struct lpfc_vport *vport,
1373                              struct lpfc_nodelist *ndlp,
1374                              void *arg,
1375                              uint32_t evt)
1376 {
1377         struct lpfc_iocbq *cmdiocb;
1378
1379         cmdiocb = (struct lpfc_iocbq *) arg;
1380         lpfc_els_rsp_acc(vport, ELS_CMD_PRLO, cmdiocb, ndlp, NULL);
1381         return ndlp->nlp_state;
1382 }
1383
1384 static uint32_t
1385 lpfc_cmpl_reglogin_reglogin_issue(struct lpfc_vport *vport,
1386                                   struct lpfc_nodelist *ndlp,
1387                                   void *arg,
1388                                   uint32_t evt)
1389 {
1390         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1391         LPFC_MBOXQ_t *pmb = (LPFC_MBOXQ_t *) arg;
1392         MAILBOX_t *mb = &pmb->u.mb;
1393         uint32_t did  = mb->un.varWords[1];
1394
1395         if (mb->mbxStatus) {
1396                 /* RegLogin failed */
1397                 lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
1398                                 "0246 RegLogin failed Data: x%x x%x x%x x%x "
1399                                  "x%x\n",
1400                                  did, mb->mbxStatus, vport->port_state,
1401                                  mb->un.varRegLogin.vpi,
1402                                  mb->un.varRegLogin.rpi);
1403                 /*
1404                  * If RegLogin failed due to lack of HBA resources do not
1405                  * retry discovery.
1406                  */
1407                 if (mb->mbxStatus == MBXERR_RPI_FULL) {
1408                         ndlp->nlp_prev_state = NLP_STE_REG_LOGIN_ISSUE;
1409                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1410                         return ndlp->nlp_state;
1411                 }
1412
1413                 /* Put ndlp in npr state set plogi timer for 1 sec */
1414                 mod_timer(&ndlp->nlp_delayfunc, jiffies + HZ * 1);
1415                 spin_lock_irq(shost->host_lock);
1416                 ndlp->nlp_flag |= NLP_DELAY_TMO;
1417                 spin_unlock_irq(shost->host_lock);
1418                 ndlp->nlp_last_elscmd = ELS_CMD_PLOGI;
1419
1420                 lpfc_issue_els_logo(vport, ndlp, 0);
1421                 ndlp->nlp_prev_state = NLP_STE_REG_LOGIN_ISSUE;
1422                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1423                 return ndlp->nlp_state;
1424         }
1425
1426         /* SLI4 ports have preallocated logical rpis. */
1427         if (vport->phba->sli_rev < LPFC_SLI_REV4)
1428                 ndlp->nlp_rpi = mb->un.varWords[0];
1429
1430         ndlp->nlp_flag |= NLP_RPI_REGISTERED;
1431
1432         /* Only if we are not a fabric nport do we issue PRLI */
1433         if (!(ndlp->nlp_type & NLP_FABRIC)) {
1434                 ndlp->nlp_prev_state = NLP_STE_REG_LOGIN_ISSUE;
1435                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_PRLI_ISSUE);
1436                 lpfc_issue_els_prli(vport, ndlp, 0);
1437         } else {
1438                 ndlp->nlp_prev_state = NLP_STE_REG_LOGIN_ISSUE;
1439                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
1440         }
1441         return ndlp->nlp_state;
1442 }
1443
1444 static uint32_t
1445 lpfc_device_rm_reglogin_issue(struct lpfc_vport *vport,
1446                               struct lpfc_nodelist *ndlp,
1447                               void *arg,
1448                               uint32_t evt)
1449 {
1450         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1451
1452         if (ndlp->nlp_flag & NLP_NPR_2B_DISC) {
1453                 spin_lock_irq(shost->host_lock);
1454                 ndlp->nlp_flag |= NLP_NODEV_REMOVE;
1455                 spin_unlock_irq(shost->host_lock);
1456                 return ndlp->nlp_state;
1457         } else {
1458                 lpfc_drop_node(vport, ndlp);
1459                 return NLP_STE_FREED_NODE;
1460         }
1461 }
1462
1463 static uint32_t
1464 lpfc_device_recov_reglogin_issue(struct lpfc_vport *vport,
1465                                  struct lpfc_nodelist *ndlp,
1466                                  void *arg,
1467                                  uint32_t evt)
1468 {
1469         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1470
1471         /* Don't do anything that will mess up processing of the
1472          * previous RSCN.
1473          */
1474         if (vport->fc_flag & FC_RSCN_DEFERRED)
1475                 return ndlp->nlp_state;
1476
1477         ndlp->nlp_prev_state = NLP_STE_REG_LOGIN_ISSUE;
1478         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1479         spin_lock_irq(shost->host_lock);
1480         ndlp->nlp_flag |= NLP_IGNR_REG_CMPL;
1481         ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
1482         spin_unlock_irq(shost->host_lock);
1483         lpfc_disc_set_adisc(vport, ndlp);
1484         return ndlp->nlp_state;
1485 }
1486
1487 static uint32_t
1488 lpfc_rcv_plogi_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1489                           void *arg, uint32_t evt)
1490 {
1491         struct lpfc_iocbq *cmdiocb;
1492
1493         cmdiocb = (struct lpfc_iocbq *) arg;
1494
1495         lpfc_rcv_plogi(vport, ndlp, cmdiocb);
1496         return ndlp->nlp_state;
1497 }
1498
1499 static uint32_t
1500 lpfc_rcv_prli_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1501                          void *arg, uint32_t evt)
1502 {
1503         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1504
1505         lpfc_els_rsp_prli_acc(vport, cmdiocb, ndlp);
1506         return ndlp->nlp_state;
1507 }
1508
1509 static uint32_t
1510 lpfc_rcv_logo_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1511                          void *arg, uint32_t evt)
1512 {
1513         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1514
1515         /* Software abort outstanding PRLI before sending acc */
1516         lpfc_els_abort(vport->phba, ndlp);
1517
1518         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_LOGO);
1519         return ndlp->nlp_state;
1520 }
1521
1522 static uint32_t
1523 lpfc_rcv_padisc_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1524                            void *arg, uint32_t evt)
1525 {
1526         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1527
1528         lpfc_rcv_padisc(vport, ndlp, cmdiocb);
1529         return ndlp->nlp_state;
1530 }
1531
1532 /* This routine is envoked when we rcv a PRLO request from a nport
1533  * we are logged into.  We should send back a PRLO rsp setting the
1534  * appropriate bits.
1535  * NEXT STATE = PRLI_ISSUE
1536  */
1537 static uint32_t
1538 lpfc_rcv_prlo_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1539                          void *arg, uint32_t evt)
1540 {
1541         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1542
1543         lpfc_els_rsp_acc(vport, ELS_CMD_PRLO, cmdiocb, ndlp, NULL);
1544         return ndlp->nlp_state;
1545 }
1546
1547 static uint32_t
1548 lpfc_cmpl_prli_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1549                           void *arg, uint32_t evt)
1550 {
1551         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1552         struct lpfc_iocbq *cmdiocb, *rspiocb;
1553         struct lpfc_hba   *phba = vport->phba;
1554         IOCB_t *irsp;
1555         PRLI *npr;
1556
1557         cmdiocb = (struct lpfc_iocbq *) arg;
1558         rspiocb = cmdiocb->context_un.rsp_iocb;
1559         npr = (PRLI *)lpfc_check_elscmpl_iocb(phba, cmdiocb, rspiocb);
1560
1561         irsp = &rspiocb->iocb;
1562         if (irsp->ulpStatus) {
1563                 if ((vport->port_type == LPFC_NPIV_PORT) &&
1564                     vport->cfg_restrict_login) {
1565                         goto out;
1566                 }
1567                 ndlp->nlp_prev_state = NLP_STE_PRLI_ISSUE;
1568                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
1569                 return ndlp->nlp_state;
1570         }
1571
1572         /* Check out PRLI rsp */
1573         ndlp->nlp_type &= ~(NLP_FCP_TARGET | NLP_FCP_INITIATOR);
1574         ndlp->nlp_fcp_info &= ~NLP_FCP_2_DEVICE;
1575         if ((npr->acceptRspCode == PRLI_REQ_EXECUTED) &&
1576             (npr->prliType == PRLI_FCP_TYPE)) {
1577                 if (npr->initiatorFunc)
1578                         ndlp->nlp_type |= NLP_FCP_INITIATOR;
1579                 if (npr->targetFunc)
1580                         ndlp->nlp_type |= NLP_FCP_TARGET;
1581                 if (npr->Retry)
1582                         ndlp->nlp_fcp_info |= NLP_FCP_2_DEVICE;
1583         }
1584         if (!(ndlp->nlp_type & NLP_FCP_TARGET) &&
1585             (vport->port_type == LPFC_NPIV_PORT) &&
1586              vport->cfg_restrict_login) {
1587 out:
1588                 spin_lock_irq(shost->host_lock);
1589                 ndlp->nlp_flag |= NLP_TARGET_REMOVE;
1590                 spin_unlock_irq(shost->host_lock);
1591                 lpfc_issue_els_logo(vport, ndlp, 0);
1592
1593                 ndlp->nlp_prev_state = NLP_STE_PRLI_ISSUE;
1594                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1595                 return ndlp->nlp_state;
1596         }
1597
1598         ndlp->nlp_prev_state = NLP_STE_PRLI_ISSUE;
1599         if (ndlp->nlp_type & NLP_FCP_TARGET)
1600                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_MAPPED_NODE);
1601         else
1602                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
1603         return ndlp->nlp_state;
1604 }
1605
1606 /*! lpfc_device_rm_prli_issue
1607  *
1608  * \pre
1609  * \post
1610  * \param   phba
1611  * \param   ndlp
1612  * \param   arg
1613  * \param   evt
1614  * \return  uint32_t
1615  *
1616  * \b Description:
1617  *    This routine is envoked when we a request to remove a nport we are in the
1618  *    process of PRLIing. We should software abort outstanding prli, unreg
1619  *    login, send a logout. We will change node state to UNUSED_NODE, put it
1620  *    on plogi list so it can be freed when LOGO completes.
1621  *
1622  */
1623
1624 static uint32_t
1625 lpfc_device_rm_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1626                           void *arg, uint32_t evt)
1627 {
1628         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1629
1630         if (ndlp->nlp_flag & NLP_NPR_2B_DISC) {
1631                 spin_lock_irq(shost->host_lock);
1632                 ndlp->nlp_flag |= NLP_NODEV_REMOVE;
1633                 spin_unlock_irq(shost->host_lock);
1634                 return ndlp->nlp_state;
1635         } else {
1636                 /* software abort outstanding PLOGI */
1637                 lpfc_els_abort(vport->phba, ndlp);
1638
1639                 lpfc_drop_node(vport, ndlp);
1640                 return NLP_STE_FREED_NODE;
1641         }
1642 }
1643
1644
1645 /*! lpfc_device_recov_prli_issue
1646  *
1647  * \pre
1648  * \post
1649  * \param   phba
1650  * \param   ndlp
1651  * \param   arg
1652  * \param   evt
1653  * \return  uint32_t
1654  *
1655  * \b Description:
1656  *    The routine is envoked when the state of a device is unknown, like
1657  *    during a link down. We should remove the nodelist entry from the
1658  *    unmapped list, issue a UNREG_LOGIN, do a software abort of the
1659  *    outstanding PRLI command, then free the node entry.
1660  */
1661 static uint32_t
1662 lpfc_device_recov_prli_issue(struct lpfc_vport *vport,
1663                              struct lpfc_nodelist *ndlp,
1664                              void *arg,
1665                              uint32_t evt)
1666 {
1667         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1668         struct lpfc_hba  *phba = vport->phba;
1669
1670         /* Don't do anything that will mess up processing of the
1671          * previous RSCN.
1672          */
1673         if (vport->fc_flag & FC_RSCN_DEFERRED)
1674                 return ndlp->nlp_state;
1675
1676         /* software abort outstanding PRLI */
1677         lpfc_els_abort(phba, ndlp);
1678
1679         ndlp->nlp_prev_state = NLP_STE_PRLI_ISSUE;
1680         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1681         spin_lock_irq(shost->host_lock);
1682         ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
1683         spin_unlock_irq(shost->host_lock);
1684         lpfc_disc_set_adisc(vport, ndlp);
1685         return ndlp->nlp_state;
1686 }
1687
1688 static uint32_t
1689 lpfc_rcv_plogi_unmap_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1690                           void *arg, uint32_t evt)
1691 {
1692         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1693
1694         lpfc_rcv_plogi(vport, ndlp, cmdiocb);
1695         return ndlp->nlp_state;
1696 }
1697
1698 static uint32_t
1699 lpfc_rcv_prli_unmap_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1700                          void *arg, uint32_t evt)
1701 {
1702         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1703
1704         lpfc_rcv_prli(vport, ndlp, cmdiocb);
1705         lpfc_els_rsp_prli_acc(vport, cmdiocb, ndlp);
1706         return ndlp->nlp_state;
1707 }
1708
1709 static uint32_t
1710 lpfc_rcv_logo_unmap_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1711                          void *arg, uint32_t evt)
1712 {
1713         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1714
1715         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_LOGO);
1716         return ndlp->nlp_state;
1717 }
1718
1719 static uint32_t
1720 lpfc_rcv_padisc_unmap_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1721                            void *arg, uint32_t evt)
1722 {
1723         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1724
1725         lpfc_rcv_padisc(vport, ndlp, cmdiocb);
1726         return ndlp->nlp_state;
1727 }
1728
1729 static uint32_t
1730 lpfc_rcv_prlo_unmap_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1731                          void *arg, uint32_t evt)
1732 {
1733         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1734
1735         lpfc_els_rsp_acc(vport, ELS_CMD_PRLO, cmdiocb, ndlp, NULL);
1736         return ndlp->nlp_state;
1737 }
1738
1739 static uint32_t
1740 lpfc_device_recov_unmap_node(struct lpfc_vport *vport,
1741                              struct lpfc_nodelist *ndlp,
1742                              void *arg,
1743                              uint32_t evt)
1744 {
1745         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1746
1747         ndlp->nlp_prev_state = NLP_STE_UNMAPPED_NODE;
1748         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1749         spin_lock_irq(shost->host_lock);
1750         ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
1751         spin_unlock_irq(shost->host_lock);
1752         lpfc_disc_set_adisc(vport, ndlp);
1753
1754         return ndlp->nlp_state;
1755 }
1756
1757 static uint32_t
1758 lpfc_rcv_plogi_mapped_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1759                            void *arg, uint32_t evt)
1760 {
1761         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1762
1763         lpfc_rcv_plogi(vport, ndlp, cmdiocb);
1764         return ndlp->nlp_state;
1765 }
1766
1767 static uint32_t
1768 lpfc_rcv_prli_mapped_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1769                           void *arg, uint32_t evt)
1770 {
1771         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1772
1773         lpfc_els_rsp_prli_acc(vport, cmdiocb, ndlp);
1774         return ndlp->nlp_state;
1775 }
1776
1777 static uint32_t
1778 lpfc_rcv_logo_mapped_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1779                           void *arg, uint32_t evt)
1780 {
1781         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1782
1783         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_LOGO);
1784         return ndlp->nlp_state;
1785 }
1786
1787 static uint32_t
1788 lpfc_rcv_padisc_mapped_node(struct lpfc_vport *vport,
1789                             struct lpfc_nodelist *ndlp,
1790                             void *arg, uint32_t evt)
1791 {
1792         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1793
1794         lpfc_rcv_padisc(vport, ndlp, cmdiocb);
1795         return ndlp->nlp_state;
1796 }
1797
1798 static uint32_t
1799 lpfc_rcv_prlo_mapped_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1800                           void *arg, uint32_t evt)
1801 {
1802         struct lpfc_hba  *phba = vport->phba;
1803         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1804
1805         /* flush the target */
1806         lpfc_sli_abort_iocb(vport, &phba->sli.ring[phba->sli.fcp_ring],
1807                             ndlp->nlp_sid, 0, LPFC_CTX_TGT);
1808
1809         /* Treat like rcv logo */
1810         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_PRLO);
1811         return ndlp->nlp_state;
1812 }
1813
1814 static uint32_t
1815 lpfc_device_recov_mapped_node(struct lpfc_vport *vport,
1816                               struct lpfc_nodelist *ndlp,
1817                               void *arg,
1818                               uint32_t evt)
1819 {
1820         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1821
1822         ndlp->nlp_prev_state = NLP_STE_MAPPED_NODE;
1823         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1824         spin_lock_irq(shost->host_lock);
1825         ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
1826         spin_unlock_irq(shost->host_lock);
1827         lpfc_disc_set_adisc(vport, ndlp);
1828         return ndlp->nlp_state;
1829 }
1830
1831 static uint32_t
1832 lpfc_rcv_plogi_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1833                         void *arg, uint32_t evt)
1834 {
1835         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1836         struct lpfc_iocbq *cmdiocb  = (struct lpfc_iocbq *) arg;
1837
1838         /* Ignore PLOGI if we have an outstanding LOGO */
1839         if (ndlp->nlp_flag & (NLP_LOGO_SND | NLP_LOGO_ACC))
1840                 return ndlp->nlp_state;
1841         if (lpfc_rcv_plogi(vport, ndlp, cmdiocb)) {
1842                 lpfc_cancel_retry_delay_tmo(vport, ndlp);
1843                 spin_lock_irq(shost->host_lock);
1844                 ndlp->nlp_flag &= ~(NLP_NPR_ADISC | NLP_NPR_2B_DISC);
1845                 spin_unlock_irq(shost->host_lock);
1846         } else if (!(ndlp->nlp_flag & NLP_NPR_2B_DISC)) {
1847                 /* send PLOGI immediately, move to PLOGI issue state */
1848                 if (!(ndlp->nlp_flag & NLP_DELAY_TMO)) {
1849                         ndlp->nlp_prev_state = NLP_STE_NPR_NODE;
1850                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
1851                         lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0);
1852                 }
1853         }
1854         return ndlp->nlp_state;
1855 }
1856
1857 static uint32_t
1858 lpfc_rcv_prli_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1859                        void *arg, uint32_t evt)
1860 {
1861         struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
1862         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1863         struct ls_rjt     stat;
1864
1865         memset(&stat, 0, sizeof (struct ls_rjt));
1866         stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
1867         stat.un.b.lsRjtRsnCodeExp = LSEXP_NOTHING_MORE;
1868         lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
1869
1870         if (!(ndlp->nlp_flag & NLP_DELAY_TMO)) {
1871                 if (ndlp->nlp_flag & NLP_NPR_ADISC) {
1872                         spin_lock_irq(shost->host_lock);
1873                         ndlp->nlp_flag &= ~NLP_NPR_ADISC;
1874                         ndlp->nlp_prev_state = NLP_STE_NPR_NODE;
1875                         spin_unlock_irq(shost->host_lock);
1876                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_ADISC_ISSUE);
1877                         lpfc_issue_els_adisc(vport, ndlp, 0);
1878                 } else {
1879                         ndlp->nlp_prev_state = NLP_STE_NPR_NODE;
1880                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
1881                         lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0);
1882                 }
1883         }
1884         return ndlp->nlp_state;
1885 }
1886
1887 static uint32_t
1888 lpfc_rcv_logo_npr_node(struct lpfc_vport *vport,  struct lpfc_nodelist *ndlp,
1889                        void *arg, uint32_t evt)
1890 {
1891         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1892
1893         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_LOGO);
1894         return ndlp->nlp_state;
1895 }
1896
1897 static uint32_t
1898 lpfc_rcv_padisc_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1899                          void *arg, uint32_t evt)
1900 {
1901         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1902
1903         lpfc_rcv_padisc(vport, ndlp, cmdiocb);
1904         /*
1905          * Do not start discovery if discovery is about to start
1906          * or discovery in progress for this node. Starting discovery
1907          * here will affect the counting of discovery threads.
1908          */
1909         if (!(ndlp->nlp_flag & NLP_DELAY_TMO) &&
1910             !(ndlp->nlp_flag & NLP_NPR_2B_DISC)) {
1911                 if (ndlp->nlp_flag & NLP_NPR_ADISC) {
1912                         ndlp->nlp_flag &= ~NLP_NPR_ADISC;
1913                         ndlp->nlp_prev_state = NLP_STE_NPR_NODE;
1914                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_ADISC_ISSUE);
1915                         lpfc_issue_els_adisc(vport, ndlp, 0);
1916                 } else {
1917                         ndlp->nlp_prev_state = NLP_STE_NPR_NODE;
1918                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
1919                         lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0);
1920                 }
1921         }
1922         return ndlp->nlp_state;
1923 }
1924
1925 static uint32_t
1926 lpfc_rcv_prlo_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1927                        void *arg, uint32_t evt)
1928 {
1929         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1930         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1931
1932         spin_lock_irq(shost->host_lock);
1933         ndlp->nlp_flag |= NLP_LOGO_ACC;
1934         spin_unlock_irq(shost->host_lock);
1935
1936         lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
1937
1938         if ((ndlp->nlp_flag & NLP_DELAY_TMO) == 0) {
1939                 mod_timer(&ndlp->nlp_delayfunc, jiffies + HZ * 1);
1940                 spin_lock_irq(shost->host_lock);
1941                 ndlp->nlp_flag |= NLP_DELAY_TMO;
1942                 ndlp->nlp_flag &= ~NLP_NPR_ADISC;
1943                 spin_unlock_irq(shost->host_lock);
1944                 ndlp->nlp_last_elscmd = ELS_CMD_PLOGI;
1945         } else {
1946                 spin_lock_irq(shost->host_lock);
1947                 ndlp->nlp_flag &= ~NLP_NPR_ADISC;
1948                 spin_unlock_irq(shost->host_lock);
1949         }
1950         return ndlp->nlp_state;
1951 }
1952
1953 static uint32_t
1954 lpfc_cmpl_plogi_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1955                          void *arg, uint32_t evt)
1956 {
1957         struct lpfc_iocbq *cmdiocb, *rspiocb;
1958         IOCB_t *irsp;
1959
1960         cmdiocb = (struct lpfc_iocbq *) arg;
1961         rspiocb = cmdiocb->context_un.rsp_iocb;
1962
1963         irsp = &rspiocb->iocb;
1964         if (irsp->ulpStatus) {
1965                 ndlp->nlp_flag |= NLP_DEFER_RM;
1966                 return NLP_STE_FREED_NODE;
1967         }
1968         return ndlp->nlp_state;
1969 }
1970
1971 static uint32_t
1972 lpfc_cmpl_prli_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1973                         void *arg, uint32_t evt)
1974 {
1975         struct lpfc_iocbq *cmdiocb, *rspiocb;
1976         IOCB_t *irsp;
1977
1978         cmdiocb = (struct lpfc_iocbq *) arg;
1979         rspiocb = cmdiocb->context_un.rsp_iocb;
1980
1981         irsp = &rspiocb->iocb;
1982         if (irsp->ulpStatus && (ndlp->nlp_flag & NLP_NODEV_REMOVE)) {
1983                 lpfc_drop_node(vport, ndlp);
1984                 return NLP_STE_FREED_NODE;
1985         }
1986         return ndlp->nlp_state;
1987 }
1988
1989 static uint32_t
1990 lpfc_cmpl_logo_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1991                         void *arg, uint32_t evt)
1992 {
1993         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1994         if (ndlp->nlp_DID == Fabric_DID) {
1995                 spin_lock_irq(shost->host_lock);
1996                 vport->fc_flag &= ~(FC_FABRIC | FC_PUBLIC_LOOP);
1997                 spin_unlock_irq(shost->host_lock);
1998         }
1999         lpfc_unreg_rpi(vport, ndlp);
2000         return ndlp->nlp_state;
2001 }
2002
2003 static uint32_t
2004 lpfc_cmpl_adisc_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
2005                          void *arg, uint32_t evt)
2006 {
2007         struct lpfc_iocbq *cmdiocb, *rspiocb;
2008         IOCB_t *irsp;
2009
2010         cmdiocb = (struct lpfc_iocbq *) arg;
2011         rspiocb = cmdiocb->context_un.rsp_iocb;
2012
2013         irsp = &rspiocb->iocb;
2014         if (irsp->ulpStatus && (ndlp->nlp_flag & NLP_NODEV_REMOVE)) {
2015                 lpfc_drop_node(vport, ndlp);
2016                 return NLP_STE_FREED_NODE;
2017         }
2018         return ndlp->nlp_state;
2019 }
2020
2021 static uint32_t
2022 lpfc_cmpl_reglogin_npr_node(struct lpfc_vport *vport,
2023                             struct lpfc_nodelist *ndlp,
2024                             void *arg, uint32_t evt)
2025 {
2026         LPFC_MBOXQ_t *pmb = (LPFC_MBOXQ_t *) arg;
2027         MAILBOX_t    *mb = &pmb->u.mb;
2028
2029         if (!mb->mbxStatus) {
2030                 /* SLI4 ports have preallocated logical rpis. */
2031                 if (vport->phba->sli_rev < LPFC_SLI_REV4)
2032                         ndlp->nlp_rpi = mb->un.varWords[0];
2033                 ndlp->nlp_flag |= NLP_RPI_REGISTERED;
2034         } else {
2035                 if (ndlp->nlp_flag & NLP_NODEV_REMOVE) {
2036                         lpfc_drop_node(vport, ndlp);
2037                         return NLP_STE_FREED_NODE;
2038                 }
2039         }
2040         return ndlp->nlp_state;
2041 }
2042
2043 static uint32_t
2044 lpfc_device_rm_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
2045                         void *arg, uint32_t evt)
2046 {
2047         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
2048
2049         if (ndlp->nlp_flag & NLP_NPR_2B_DISC) {
2050                 spin_lock_irq(shost->host_lock);
2051                 ndlp->nlp_flag |= NLP_NODEV_REMOVE;
2052                 spin_unlock_irq(shost->host_lock);
2053                 return ndlp->nlp_state;
2054         }
2055         lpfc_drop_node(vport, ndlp);
2056         return NLP_STE_FREED_NODE;
2057 }
2058
2059 static uint32_t
2060 lpfc_device_recov_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
2061                            void *arg, uint32_t evt)
2062 {
2063         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
2064
2065         /* Don't do anything that will mess up processing of the
2066          * previous RSCN.
2067          */
2068         if (vport->fc_flag & FC_RSCN_DEFERRED)
2069                 return ndlp->nlp_state;
2070
2071         lpfc_cancel_retry_delay_tmo(vport, ndlp);
2072         spin_lock_irq(shost->host_lock);
2073         ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
2074         spin_unlock_irq(shost->host_lock);
2075         return ndlp->nlp_state;
2076 }
2077
2078
2079 /* This next section defines the NPort Discovery State Machine */
2080
2081 /* There are 4 different double linked lists nodelist entries can reside on.
2082  * The plogi list and adisc list are used when Link Up discovery or RSCN
2083  * processing is needed. Each list holds the nodes that we will send PLOGI
2084  * or ADISC on. These lists will keep track of what nodes will be effected
2085  * by an RSCN, or a Link Up (Typically, all nodes are effected on Link Up).
2086  * The unmapped_list will contain all nodes that we have successfully logged
2087  * into at the Fibre Channel level. The mapped_list will contain all nodes
2088  * that are mapped FCP targets.
2089  */
2090 /*
2091  * The bind list is a list of undiscovered (potentially non-existent) nodes
2092  * that we have saved binding information on. This information is used when
2093  * nodes transition from the unmapped to the mapped list.
2094  */
2095 /* For UNUSED_NODE state, the node has just been allocated .
2096  * For PLOGI_ISSUE and REG_LOGIN_ISSUE, the node is on
2097  * the PLOGI list. For REG_LOGIN_COMPL, the node is taken off the PLOGI list
2098  * and put on the unmapped list. For ADISC processing, the node is taken off
2099  * the ADISC list and placed on either the mapped or unmapped list (depending
2100  * on its previous state). Once on the unmapped list, a PRLI is issued and the
2101  * state changed to PRLI_ISSUE. When the PRLI completion occurs, the state is
2102  * changed to UNMAPPED_NODE. If the completion indicates a mapped
2103  * node, the node is taken off the unmapped list. The binding list is checked
2104  * for a valid binding, or a binding is automatically assigned. If binding
2105  * assignment is unsuccessful, the node is left on the unmapped list. If
2106  * binding assignment is successful, the associated binding list entry (if
2107  * any) is removed, and the node is placed on the mapped list.
2108  */
2109 /*
2110  * For a Link Down, all nodes on the ADISC, PLOGI, unmapped or mapped
2111  * lists will receive a DEVICE_RECOVERY event. If the linkdown or devloss timers
2112  * expire, all effected nodes will receive a DEVICE_RM event.
2113  */
2114 /*
2115  * For a Link Up or RSCN, all nodes will move from the mapped / unmapped lists
2116  * to either the ADISC or PLOGI list.  After a Nameserver query or ALPA loopmap
2117  * check, additional nodes may be added or removed (via DEVICE_RM) to / from
2118  * the PLOGI or ADISC lists. Once the PLOGI and ADISC lists are populated,
2119  * we will first process the ADISC list.  32 entries are processed initially and
2120  * ADISC is initited for each one.  Completions / Events for each node are
2121  * funnelled thru the state machine.  As each node finishes ADISC processing, it
2122  * starts ADISC for any nodes waiting for ADISC processing. If no nodes are
2123  * waiting, and the ADISC list count is identically 0, then we are done. For
2124  * Link Up discovery, since all nodes on the PLOGI list are UNREG_LOGIN'ed, we
2125  * can issue a CLEAR_LA and reenable Link Events. Next we will process the PLOGI
2126  * list.  32 entries are processed initially and PLOGI is initited for each one.
2127  * Completions / Events for each node are funnelled thru the state machine.  As
2128  * each node finishes PLOGI processing, it starts PLOGI for any nodes waiting
2129  * for PLOGI processing. If no nodes are waiting, and the PLOGI list count is
2130  * indentically 0, then we are done. We have now completed discovery / RSCN
2131  * handling. Upon completion, ALL nodes should be on either the mapped or
2132  * unmapped lists.
2133  */
2134
2135 static uint32_t (*lpfc_disc_action[NLP_STE_MAX_STATE * NLP_EVT_MAX_EVENT])
2136      (struct lpfc_vport *, struct lpfc_nodelist *, void *, uint32_t) = {
2137         /* Action routine                  Event       Current State  */
2138         lpfc_rcv_plogi_unused_node,     /* RCV_PLOGI   UNUSED_NODE    */
2139         lpfc_rcv_els_unused_node,       /* RCV_PRLI        */
2140         lpfc_rcv_logo_unused_node,      /* RCV_LOGO        */
2141         lpfc_rcv_els_unused_node,       /* RCV_ADISC       */
2142         lpfc_rcv_els_unused_node,       /* RCV_PDISC       */
2143         lpfc_rcv_els_unused_node,       /* RCV_PRLO        */
2144         lpfc_disc_illegal,              /* CMPL_PLOGI      */
2145         lpfc_disc_illegal,              /* CMPL_PRLI       */
2146         lpfc_cmpl_logo_unused_node,     /* CMPL_LOGO       */
2147         lpfc_disc_illegal,              /* CMPL_ADISC      */
2148         lpfc_disc_illegal,              /* CMPL_REG_LOGIN  */
2149         lpfc_device_rm_unused_node,     /* DEVICE_RM       */
2150         lpfc_disc_illegal,              /* DEVICE_RECOVERY */
2151
2152         lpfc_rcv_plogi_plogi_issue,     /* RCV_PLOGI   PLOGI_ISSUE    */
2153         lpfc_rcv_prli_plogi_issue,      /* RCV_PRLI        */
2154         lpfc_rcv_logo_plogi_issue,      /* RCV_LOGO        */
2155         lpfc_rcv_els_plogi_issue,       /* RCV_ADISC       */
2156         lpfc_rcv_els_plogi_issue,       /* RCV_PDISC       */
2157         lpfc_rcv_els_plogi_issue,       /* RCV_PRLO        */
2158         lpfc_cmpl_plogi_plogi_issue,    /* CMPL_PLOGI      */
2159         lpfc_disc_illegal,              /* CMPL_PRLI       */
2160         lpfc_cmpl_logo_plogi_issue,     /* CMPL_LOGO       */
2161         lpfc_disc_illegal,              /* CMPL_ADISC      */
2162         lpfc_cmpl_reglogin_plogi_issue,/* CMPL_REG_LOGIN  */
2163         lpfc_device_rm_plogi_issue,     /* DEVICE_RM       */
2164         lpfc_device_recov_plogi_issue,  /* DEVICE_RECOVERY */
2165
2166         lpfc_rcv_plogi_adisc_issue,     /* RCV_PLOGI   ADISC_ISSUE    */
2167         lpfc_rcv_prli_adisc_issue,      /* RCV_PRLI        */
2168         lpfc_rcv_logo_adisc_issue,      /* RCV_LOGO        */
2169         lpfc_rcv_padisc_adisc_issue,    /* RCV_ADISC       */
2170         lpfc_rcv_padisc_adisc_issue,    /* RCV_PDISC       */
2171         lpfc_rcv_prlo_adisc_issue,      /* RCV_PRLO        */
2172         lpfc_disc_illegal,              /* CMPL_PLOGI      */
2173         lpfc_disc_illegal,              /* CMPL_PRLI       */
2174         lpfc_disc_illegal,              /* CMPL_LOGO       */
2175         lpfc_cmpl_adisc_adisc_issue,    /* CMPL_ADISC      */
2176         lpfc_disc_illegal,              /* CMPL_REG_LOGIN  */
2177         lpfc_device_rm_adisc_issue,     /* DEVICE_RM       */
2178         lpfc_device_recov_adisc_issue,  /* DEVICE_RECOVERY */
2179
2180         lpfc_rcv_plogi_reglogin_issue,  /* RCV_PLOGI  REG_LOGIN_ISSUE */
2181         lpfc_rcv_prli_reglogin_issue,   /* RCV_PLOGI       */
2182         lpfc_rcv_logo_reglogin_issue,   /* RCV_LOGO        */
2183         lpfc_rcv_padisc_reglogin_issue, /* RCV_ADISC       */
2184         lpfc_rcv_padisc_reglogin_issue, /* RCV_PDISC       */
2185         lpfc_rcv_prlo_reglogin_issue,   /* RCV_PRLO        */
2186         lpfc_cmpl_plogi_illegal,        /* CMPL_PLOGI      */
2187         lpfc_disc_illegal,              /* CMPL_PRLI       */
2188         lpfc_disc_illegal,              /* CMPL_LOGO       */
2189         lpfc_disc_illegal,              /* CMPL_ADISC      */
2190         lpfc_cmpl_reglogin_reglogin_issue,/* CMPL_REG_LOGIN  */
2191         lpfc_device_rm_reglogin_issue,  /* DEVICE_RM       */
2192         lpfc_device_recov_reglogin_issue,/* DEVICE_RECOVERY */
2193
2194         lpfc_rcv_plogi_prli_issue,      /* RCV_PLOGI   PRLI_ISSUE     */
2195         lpfc_rcv_prli_prli_issue,       /* RCV_PRLI        */
2196         lpfc_rcv_logo_prli_issue,       /* RCV_LOGO        */
2197         lpfc_rcv_padisc_prli_issue,     /* RCV_ADISC       */
2198         lpfc_rcv_padisc_prli_issue,     /* RCV_PDISC       */
2199         lpfc_rcv_prlo_prli_issue,       /* RCV_PRLO        */
2200         lpfc_cmpl_plogi_illegal,        /* CMPL_PLOGI      */
2201         lpfc_cmpl_prli_prli_issue,      /* CMPL_PRLI       */
2202         lpfc_disc_illegal,              /* CMPL_LOGO       */
2203         lpfc_disc_illegal,              /* CMPL_ADISC      */
2204         lpfc_disc_illegal,              /* CMPL_REG_LOGIN  */
2205         lpfc_device_rm_prli_issue,      /* DEVICE_RM       */
2206         lpfc_device_recov_prli_issue,   /* DEVICE_RECOVERY */
2207
2208         lpfc_rcv_plogi_unmap_node,      /* RCV_PLOGI   UNMAPPED_NODE  */
2209         lpfc_rcv_prli_unmap_node,       /* RCV_PRLI        */
2210         lpfc_rcv_logo_unmap_node,       /* RCV_LOGO        */
2211         lpfc_rcv_padisc_unmap_node,     /* RCV_ADISC       */
2212         lpfc_rcv_padisc_unmap_node,     /* RCV_PDISC       */
2213         lpfc_rcv_prlo_unmap_node,       /* RCV_PRLO        */
2214         lpfc_disc_illegal,              /* CMPL_PLOGI      */
2215         lpfc_disc_illegal,              /* CMPL_PRLI       */
2216         lpfc_disc_illegal,              /* CMPL_LOGO       */
2217         lpfc_disc_illegal,              /* CMPL_ADISC      */
2218         lpfc_disc_illegal,              /* CMPL_REG_LOGIN  */
2219         lpfc_disc_illegal,              /* DEVICE_RM       */
2220         lpfc_device_recov_unmap_node,   /* DEVICE_RECOVERY */
2221
2222         lpfc_rcv_plogi_mapped_node,     /* RCV_PLOGI   MAPPED_NODE    */
2223         lpfc_rcv_prli_mapped_node,      /* RCV_PRLI        */
2224         lpfc_rcv_logo_mapped_node,      /* RCV_LOGO        */
2225         lpfc_rcv_padisc_mapped_node,    /* RCV_ADISC       */
2226         lpfc_rcv_padisc_mapped_node,    /* RCV_PDISC       */
2227         lpfc_rcv_prlo_mapped_node,      /* RCV_PRLO        */
2228         lpfc_disc_illegal,              /* CMPL_PLOGI      */
2229         lpfc_disc_illegal,              /* CMPL_PRLI       */
2230         lpfc_disc_illegal,              /* CMPL_LOGO       */
2231         lpfc_disc_illegal,              /* CMPL_ADISC      */
2232         lpfc_disc_illegal,              /* CMPL_REG_LOGIN  */
2233         lpfc_disc_illegal,              /* DEVICE_RM       */
2234         lpfc_device_recov_mapped_node,  /* DEVICE_RECOVERY */
2235
2236         lpfc_rcv_plogi_npr_node,        /* RCV_PLOGI   NPR_NODE    */
2237         lpfc_rcv_prli_npr_node,         /* RCV_PRLI        */
2238         lpfc_rcv_logo_npr_node,         /* RCV_LOGO        */
2239         lpfc_rcv_padisc_npr_node,       /* RCV_ADISC       */
2240         lpfc_rcv_padisc_npr_node,       /* RCV_PDISC       */
2241         lpfc_rcv_prlo_npr_node,         /* RCV_PRLO        */
2242         lpfc_cmpl_plogi_npr_node,       /* CMPL_PLOGI      */
2243         lpfc_cmpl_prli_npr_node,        /* CMPL_PRLI       */
2244         lpfc_cmpl_logo_npr_node,        /* CMPL_LOGO       */
2245         lpfc_cmpl_adisc_npr_node,       /* CMPL_ADISC      */
2246         lpfc_cmpl_reglogin_npr_node,    /* CMPL_REG_LOGIN  */
2247         lpfc_device_rm_npr_node,        /* DEVICE_RM       */
2248         lpfc_device_recov_npr_node,     /* DEVICE_RECOVERY */
2249 };
2250
2251 int
2252 lpfc_disc_state_machine(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
2253                         void *arg, uint32_t evt)
2254 {
2255         uint32_t cur_state, rc;
2256         uint32_t(*func) (struct lpfc_vport *, struct lpfc_nodelist *, void *,
2257                          uint32_t);
2258         uint32_t got_ndlp = 0;
2259
2260         if (lpfc_nlp_get(ndlp))
2261                 got_ndlp = 1;
2262
2263         cur_state = ndlp->nlp_state;
2264
2265         /* DSM in event <evt> on NPort <nlp_DID> in state <cur_state> */
2266         lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
2267                          "0211 DSM in event x%x on NPort x%x in "
2268                          "state %d Data: x%x\n",
2269                          evt, ndlp->nlp_DID, cur_state, ndlp->nlp_flag);
2270
2271         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_DSM,
2272                  "DSM in:          evt:%d ste:%d did:x%x",
2273                 evt, cur_state, ndlp->nlp_DID);
2274
2275         func = lpfc_disc_action[(cur_state * NLP_EVT_MAX_EVENT) + evt];
2276         rc = (func) (vport, ndlp, arg, evt);
2277
2278         /* DSM out state <rc> on NPort <nlp_DID> */
2279         if (got_ndlp) {
2280                 lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
2281                          "0212 DSM out state %d on NPort x%x Data: x%x\n",
2282                          rc, ndlp->nlp_DID, ndlp->nlp_flag);
2283
2284                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_DSM,
2285                         "DSM out:         ste:%d did:x%x flg:x%x",
2286                         rc, ndlp->nlp_DID, ndlp->nlp_flag);
2287                 /* Decrement the ndlp reference count held for this function */
2288                 lpfc_nlp_put(ndlp);
2289         } else {
2290                 lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
2291                         "0213 DSM out state %d on NPort free\n", rc);
2292
2293                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_DSM,
2294                         "DSM out:         ste:%d did:x%x flg:x%x",
2295                         rc, 0, 0);
2296         }
2297
2298         return rc;
2299 }