git.oblomov.eu Git - linux-2.6/blob - 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) 2004-2008 Emulex.  All rights reserved.           *
   5  * EMULEX and SLI are trademarks of Emulex.                        *
   6  * www.emulex.com                                                  *
   7  * Portions Copyright (C) 2004-2005 Christoph Hellwig              *
   8  *                                                                 *
   9  * This program is free software; you can redistribute it and/or   *
  10  * modify it under the terms of version 2 of the GNU General       *
  11  * Public License as published by the Free Software Foundation.    *
  12  * This program is distributed in the hope that it will be useful. *
  13  * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND          *
  14  * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,  *
  15  * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE      *
  16  * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
  17  * TO BE LEGALLY INVALID.  See the GNU General Public License for  *
  18  * more details, a copy of which can be found in the file COPYING  *
  19  * included with this package.                                     *
  20  *******************************************************************/
  21
  22 #include <linux/blkdev.h>
  23 #include <linux/pci.h>
  24 #include <linux/interrupt.h>
  25
  26 #include <scsi/scsi.h>
  27 #include <scsi/scsi_device.h>
  28 #include <scsi/scsi_host.h>
  29 #include <scsi/scsi_transport_fc.h>
  30
  31 #include "lpfc_hw.h"
  32 #include "lpfc_sli.h"
  33 #include "lpfc_disc.h"
  34 #include "lpfc_scsi.h"
  35 #include "lpfc.h"
  36 #include "lpfc_logmsg.h"
  37 #include "lpfc_crtn.h"
  38 #include "lpfc_vport.h"
  39 #include "lpfc_debugfs.h"
  40
  41
  42 /* Called to verify a rcv'ed ADISC was intended for us. */
  43 static int
  44 lpfc_check_adisc(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
  45                  struct lpfc_name *nn, struct lpfc_name *pn)
  46 {
  47         /* Compare the ADISC rsp WWNN / WWPN matches our internal node
  48          * table entry for that node.
  49          */
  50         if (memcmp(nn, &ndlp->nlp_nodename, sizeof (struct lpfc_name)))
  51                 return 0;
  52
  53         if (memcmp(pn, &ndlp->nlp_portname, sizeof (struct lpfc_name)))
  54                 return 0;
  55
  56         /* we match, return success */
  57         return 1;
  58 }
  59
  60 int
  61 lpfc_check_sparm(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
  62                  struct serv_parm * sp, uint32_t class)
  63 {
  64         volatile struct serv_parm *hsp = &vport->fc_sparam;
  65         uint16_t hsp_value, ssp_value = 0;
  66
  67         /*
  68          * The receive data field size and buffer-to-buffer receive data field
  69          * size entries are 16 bits but are represented as two 8-bit fields in
  70          * the driver data structure to account for rsvd bits and other control
  71          * bits.  Reconstruct and compare the fields as a 16-bit values before
  72          * correcting the byte values.
  73          */
  74         if (sp->cls1.classValid) {
  75                 hsp_value = (hsp->cls1.rcvDataSizeMsb << 8) |
  76                                 hsp->cls1.rcvDataSizeLsb;
  77                 ssp_value = (sp->cls1.rcvDataSizeMsb << 8) |
  78                                 sp->cls1.rcvDataSizeLsb;
  79                 if (!ssp_value)
  80                         goto bad_service_param;
  81                 if (ssp_value > hsp_value) {
  82                         sp->cls1.rcvDataSizeLsb = hsp->cls1.rcvDataSizeLsb;
  83                         sp->cls1.rcvDataSizeMsb = hsp->cls1.rcvDataSizeMsb;
  84                 }
  85         } else if (class == CLASS1) {
  86                 goto bad_service_param;
  87         }
  88
  89         if (sp->cls2.classValid) {
  90                 hsp_value = (hsp->cls2.rcvDataSizeMsb << 8) |
  91                                 hsp->cls2.rcvDataSizeLsb;
  92                 ssp_value = (sp->cls2.rcvDataSizeMsb << 8) |
  93                                 sp->cls2.rcvDataSizeLsb;
  94                 if (!ssp_value)
  95                         goto bad_service_param;
  96                 if (ssp_value > hsp_value) {
  97                         sp->cls2.rcvDataSizeLsb = hsp->cls2.rcvDataSizeLsb;
  98                         sp->cls2.rcvDataSizeMsb = hsp->cls2.rcvDataSizeMsb;
  99                 }
 100         } else if (class == CLASS2) {
 101                 goto bad_service_param;
 102         }
 103
 104         if (sp->cls3.classValid) {
 105                 hsp_value = (hsp->cls3.rcvDataSizeMsb << 8) |
 106                                 hsp->cls3.rcvDataSizeLsb;
 107                 ssp_value = (sp->cls3.rcvDataSizeMsb << 8) |
 108                                 sp->cls3.rcvDataSizeLsb;
 109                 if (!ssp_value)
 110                         goto bad_service_param;
 111                 if (ssp_value > hsp_value) {
 112                         sp->cls3.rcvDataSizeLsb = hsp->cls3.rcvDataSizeLsb;
 113                         sp->cls3.rcvDataSizeMsb = hsp->cls3.rcvDataSizeMsb;
 114                 }
 115         } else if (class == CLASS3) {
 116                 goto bad_service_param;
 117         }
 118
 119         /*
 120          * Preserve the upper four bits of the MSB from the PLOGI response.
 121          * These bits contain the Buffer-to-Buffer State Change Number
 122          * from the target and need to be passed to the FW.
 123          */
 124         hsp_value = (hsp->cmn.bbRcvSizeMsb << 8) | hsp->cmn.bbRcvSizeLsb;
 125         ssp_value = (sp->cmn.bbRcvSizeMsb << 8) | sp->cmn.bbRcvSizeLsb;
 126         if (ssp_value > hsp_value) {
 127                 sp->cmn.bbRcvSizeLsb = hsp->cmn.bbRcvSizeLsb;
 128                 sp->cmn.bbRcvSizeMsb = (sp->cmn.bbRcvSizeMsb & 0xF0) |
 129                                        (hsp->cmn.bbRcvSizeMsb & 0x0F);
 130         }
 131
 132         memcpy(&ndlp->nlp_nodename, &sp->nodeName, sizeof (struct lpfc_name));
 133         memcpy(&ndlp->nlp_portname, &sp->portName, sizeof (struct lpfc_name));
 134         return 1;
 135 bad_service_param:
 136         lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
 137                          "0207 Device %x "
 138                          "(%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x) sent "
 139                          "invalid service parameters.  Ignoring device.\n",
 140                          ndlp->nlp_DID,
 141                          sp->nodeName.u.wwn[0], sp->nodeName.u.wwn[1],
 142                          sp->nodeName.u.wwn[2], sp->nodeName.u.wwn[3],
 143                          sp->nodeName.u.wwn[4], sp->nodeName.u.wwn[5],
 144                          sp->nodeName.u.wwn[6], sp->nodeName.u.wwn[7]);
 145         return 0;
 146 }
 147
 148 static void *
 149 lpfc_check_elscmpl_iocb(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
 150                         struct lpfc_iocbq *rspiocb)
 151 {
 152         struct lpfc_dmabuf *pcmd, *prsp;
 153         uint32_t *lp;
 154         void     *ptr = NULL;
 155         IOCB_t   *irsp;
 156
 157         irsp = &rspiocb->iocb;
 158         pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
 159
 160         /* For lpfc_els_abort, context2 could be zero'ed to delay
 161          * freeing associated memory till after ABTS completes.
 162          */
 163         if (pcmd) {
 164                 prsp =  list_get_first(&pcmd->list, struct lpfc_dmabuf,
 165                                        list);
 166                 if (prsp) {
 167                         lp = (uint32_t *) prsp->virt;
 168                         ptr = (void *)((uint8_t *)lp + sizeof(uint32_t));
 169                 }
 170         } else {
 171                 /* Force ulpStatus error since we are returning NULL ptr */
 172                 if (!(irsp->ulpStatus)) {
 173                         irsp->ulpStatus = IOSTAT_LOCAL_REJECT;
 174                         irsp->un.ulpWord[4] = IOERR_SLI_ABORTED;
 175                 }
 176                 ptr = NULL;
 177         }
 178         return ptr;
 179 }
 180
 181
 182 /*
 183  * Free resources / clean up outstanding I/Os
 184  * associated with a LPFC_NODELIST entry. This
 185  * routine effectively results in a "software abort".
 186  */
 187 int
 188 lpfc_els_abort(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
 189 {
 190         LIST_HEAD(completions);
 191         struct lpfc_sli  *psli = &phba->sli;
 192         struct lpfc_sli_ring *pring = &psli->ring[LPFC_ELS_RING];
 193         struct lpfc_iocbq *iocb, *next_iocb;
 194         IOCB_t *cmd;
 195
 196         /* Abort outstanding I/O on NPort <nlp_DID> */
 197         lpfc_printf_vlog(ndlp->vport, KERN_INFO, LOG_DISCOVERY,
 198                          "0205 Abort outstanding I/O on NPort x%x "
 199                          "Data: x%x x%x x%x\n",
 200                          ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
 201                          ndlp->nlp_rpi);
 202
 203         lpfc_fabric_abort_nport(ndlp);
 204
 205         /* First check the txq */
 206         spin_lock_irq(&phba->hbalock);
 207         list_for_each_entry_safe(iocb, next_iocb, &pring->txq, list) {
 208                 /* Check to see if iocb matches the nport we are looking for */
 209                 if (lpfc_check_sli_ndlp(phba, pring, iocb, ndlp)) {
 210                         /* It matches, so deque and call compl with anp error */
 211                         list_move_tail(&iocb->list, &completions);
 212                         pring->txq_cnt--;
 213                 }
 214         }
 215
 216         /* Next check the txcmplq */
 217         list_for_each_entry_safe(iocb, next_iocb, &pring->txcmplq, list) {
 218                 /* Check to see if iocb matches the nport we are looking for */
 219                 if (lpfc_check_sli_ndlp(phba, pring, iocb, ndlp)) {
 220                         lpfc_sli_issue_abort_iotag(phba, pring, iocb);
 221                 }
 222         }
 223         spin_unlock_irq(&phba->hbalock);
 224
 225         while (!list_empty(&completions)) {
 226                 iocb = list_get_first(&completions, struct lpfc_iocbq, list);
 227                 cmd = &iocb->iocb;
 228                 list_del_init(&iocb->list);
 229
 230                 if (!iocb->iocb_cmpl)
 231                         lpfc_sli_release_iocbq(phba, iocb);
 232                 else {
 233                         cmd->ulpStatus = IOSTAT_LOCAL_REJECT;
 234                         cmd->un.ulpWord[4] = IOERR_SLI_ABORTED;
 235                         (iocb->iocb_cmpl) (phba, iocb, iocb);
 236                 }
 237         }
 238         lpfc_cancel_retry_delay_tmo(phba->pport, ndlp);
 239         return 0;
 240 }
 241
 242 static int
 243 lpfc_rcv_plogi(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 244                struct lpfc_iocbq *cmdiocb)
 245 {
 246         struct Scsi_Host   *shost = lpfc_shost_from_vport(vport);
 247         struct lpfc_hba    *phba = vport->phba;
 248         struct lpfc_dmabuf *pcmd;
 249         uint32_t *lp;
 250         IOCB_t *icmd;
 251         struct serv_parm *sp;
 252         LPFC_MBOXQ_t *mbox;
 253         struct ls_rjt stat;
 254         int rc;
 255
 256         memset(&stat, 0, sizeof (struct ls_rjt));
 257         if (vport->port_state <= LPFC_FLOGI) {
 258                 /* Before responding to PLOGI, check for pt2pt mode.
 259                  * If we are pt2pt, with an outstanding FLOGI, abort
 260                  * the FLOGI and resend it first.
 261                  */
 262                 if (vport->fc_flag & FC_PT2PT) {
 263                          lpfc_els_abort_flogi(phba);
 264                         if (!(vport->fc_flag & FC_PT2PT_PLOGI)) {
 265                                 /* If the other side is supposed to initiate
 266                                  * the PLOGI anyway, just ACC it now and
 267                                  * move on with discovery.
 268                                  */
 269                                 phba->fc_edtov = FF_DEF_EDTOV;
 270                                 phba->fc_ratov = FF_DEF_RATOV;
 271                                 /* Start discovery - this should just do
 272                                    CLEAR_LA */
 273                                 lpfc_disc_start(vport);
 274                         } else
 275                                 lpfc_initial_flogi(vport);
 276                 } else {
 277                         stat.un.b.lsRjtRsnCode = LSRJT_LOGICAL_BSY;
 278                         stat.un.b.lsRjtRsnCodeExp = LSEXP_NOTHING_MORE;
 279                         lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb,
 280                                             ndlp, NULL);
 281                         return 0;
 282                 }
 283         }
 284         pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
 285         lp = (uint32_t *) pcmd->virt;
 286         sp = (struct serv_parm *) ((uint8_t *) lp + sizeof (uint32_t));
 287         if (wwn_to_u64(sp->portName.u.wwn) == 0) {
 288                 lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
 289                                  "0140 PLOGI Reject: invalid nname\n");
 290                 stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
 291                 stat.un.b.lsRjtRsnCodeExp = LSEXP_INVALID_PNAME;
 292                 lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp,
 293                         NULL);
 294                 return 0;
 295         }
 296         if (wwn_to_u64(sp->nodeName.u.wwn) == 0) {
 297                 lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
 298                                  "0141 PLOGI Reject: invalid pname\n");
 299                 stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
 300                 stat.un.b.lsRjtRsnCodeExp = LSEXP_INVALID_NNAME;
 301                 lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp,
 302                         NULL);
 303                 return 0;
 304         }
 305         if ((lpfc_check_sparm(vport, ndlp, sp, CLASS3) == 0)) {
 306                 /* Reject this request because invalid parameters */
 307                 stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
 308                 stat.un.b.lsRjtRsnCodeExp = LSEXP_SPARM_OPTIONS;
 309                 lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp,
 310                         NULL);
 311                 return 0;
 312         }
 313         icmd = &cmdiocb->iocb;
 314
 315         /* PLOGI chkparm OK */
 316         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
 317                          "0114 PLOGI chkparm OK Data: x%x x%x x%x x%x\n",
 318                          ndlp->nlp_DID, ndlp->nlp_state, ndlp->nlp_flag,
 319                          ndlp->nlp_rpi);
 320
 321         if (vport->cfg_fcp_class == 2 && sp->cls2.classValid)
 322                 ndlp->nlp_fcp_info |= CLASS2;
 323         else
 324                 ndlp->nlp_fcp_info |= CLASS3;
 325
 326         ndlp->nlp_class_sup = 0;
 327         if (sp->cls1.classValid)
 328                 ndlp->nlp_class_sup |= FC_COS_CLASS1;
 329         if (sp->cls2.classValid)
 330                 ndlp->nlp_class_sup |= FC_COS_CLASS2;
 331         if (sp->cls3.classValid)
 332                 ndlp->nlp_class_sup |= FC_COS_CLASS3;
 333         if (sp->cls4.classValid)
 334                 ndlp->nlp_class_sup |= FC_COS_CLASS4;
 335         ndlp->nlp_maxframe =
 336                 ((sp->cmn.bbRcvSizeMsb & 0x0F) << 8) | sp->cmn.bbRcvSizeLsb;
 337
 338         /* no need to reg_login if we are already in one of these states */
 339         switch (ndlp->nlp_state) {
 340         case  NLP_STE_NPR_NODE:
 341                 if (!(ndlp->nlp_flag & NLP_NPR_ADISC))
 342                         break;
 343         case  NLP_STE_REG_LOGIN_ISSUE:
 344         case  NLP_STE_PRLI_ISSUE:
 345         case  NLP_STE_UNMAPPED_NODE:
 346         case  NLP_STE_MAPPED_NODE:
 347                 lpfc_els_rsp_acc(vport, ELS_CMD_PLOGI, cmdiocb, ndlp, NULL);
 348                 return 1;
 349         }
 350
 351         if ((vport->fc_flag & FC_PT2PT) &&
 352             !(vport->fc_flag & FC_PT2PT_PLOGI)) {
 353                 /* rcv'ed PLOGI decides what our NPortId will be */
 354                 vport->fc_myDID = icmd->un.rcvels.parmRo;
 355                 mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
 356                 if (mbox == NULL)
 357                         goto out;
 358                 lpfc_config_link(phba, mbox);
 359                 mbox->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
 360                 mbox->vport = vport;
 361                 rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
 362                 if (rc == MBX_NOT_FINISHED) {
 363                         mempool_free(mbox, phba->mbox_mem_pool);
 364                         goto out;
 365                 }
 366
 367                 lpfc_can_disctmo(vport);
 368         }
 369         mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
 370         if (!mbox)
 371                 goto out;
 372
 373         rc = lpfc_reg_login(phba, vport->vpi, icmd->un.rcvels.remoteID,
 374                             (uint8_t *) sp, mbox, 0);
 375         if (rc) {
 376                 mempool_free(mbox, phba->mbox_mem_pool);
 377                 goto out;
 378         }
 379
 380         /* ACC PLOGI rsp command needs to execute first,
 381          * queue this mbox command to be processed later.
 382          */
 383         mbox->mbox_cmpl = lpfc_mbx_cmpl_reg_login;
 384         /*
 385          * mbox->context2 = lpfc_nlp_get(ndlp) deferred until mailbox
 386          * command issued in lpfc_cmpl_els_acc().
 387          */
 388         mbox->vport = vport;
 389         spin_lock_irq(shost->host_lock);
 390         ndlp->nlp_flag |= (NLP_ACC_REGLOGIN | NLP_RCV_PLOGI);
 391         spin_unlock_irq(shost->host_lock);
 392
 393         /*
 394          * If there is an outstanding PLOGI issued, abort it before
 395          * sending ACC rsp for received PLOGI. If pending plogi
 396          * is not canceled here, the plogi will be rejected by
 397          * remote port and will be retried. On a configuration with
 398          * single discovery thread, this will cause a huge delay in
 399          * discovery. Also this will cause multiple state machines
 400          * running in parallel for this node.
 401          */
 402         if (ndlp->nlp_state == NLP_STE_PLOGI_ISSUE) {
 403                 /* software abort outstanding PLOGI */
 404                 lpfc_els_abort(phba, ndlp);
 405         }
 406
 407         if ((vport->port_type == LPFC_NPIV_PORT &&
 408              vport->cfg_restrict_login)) {
 409
 410                 /* In order to preserve RPIs, we want to cleanup
 411                  * the default RPI the firmware created to rcv
 412                  * this ELS request. The only way to do this is
 413                  * to register, then unregister the RPI.
 414                  */
 415                 spin_lock_irq(shost->host_lock);
 416                 ndlp->nlp_flag |= NLP_RM_DFLT_RPI;
 417                 spin_unlock_irq(shost->host_lock);
 418                 stat.un.b.lsRjtRsnCode = LSRJT_INVALID_CMD;
 419                 stat.un.b.lsRjtRsnCodeExp = LSEXP_NOTHING_MORE;
 420                 lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb,
 421                         ndlp, mbox);
 422                 return 1;
 423         }
 424         lpfc_els_rsp_acc(vport, ELS_CMD_PLOGI, cmdiocb, ndlp, mbox);
 425         return 1;
 426 out:
 427         stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
 428         stat.un.b.lsRjtRsnCodeExp = LSEXP_OUT_OF_RESOURCE;
 429         lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
 430         return 0;
 431 }
 432
 433 static int
 434 lpfc_rcv_padisc(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 435                 struct lpfc_iocbq *cmdiocb)
 436 {
 437         struct Scsi_Host   *shost = lpfc_shost_from_vport(vport);
 438         struct lpfc_dmabuf *pcmd;
 439         struct serv_parm   *sp;
 440         struct lpfc_name   *pnn, *ppn;
 441         struct ls_rjt stat;
 442         ADISC *ap;
 443         IOCB_t *icmd;
 444         uint32_t *lp;
 445         uint32_t cmd;
 446
 447         pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
 448         lp = (uint32_t *) pcmd->virt;
 449
 450         cmd = *lp++;
 451         if (cmd == ELS_CMD_ADISC) {
 452                 ap = (ADISC *) lp;
 453                 pnn = (struct lpfc_name *) & ap->nodeName;
 454                 ppn = (struct lpfc_name *) & ap->portName;
 455         } else {
 456                 sp = (struct serv_parm *) lp;
 457                 pnn = (struct lpfc_name *) & sp->nodeName;
 458                 ppn = (struct lpfc_name *) & sp->portName;
 459         }
 460
 461         icmd = &cmdiocb->iocb;
 462         if (icmd->ulpStatus == 0 && lpfc_check_adisc(vport, ndlp, pnn, ppn)) {
 463                 if (cmd == ELS_CMD_ADISC) {
 464                         lpfc_els_rsp_adisc_acc(vport, cmdiocb, ndlp);
 465                 } else {
 466                         lpfc_els_rsp_acc(vport, ELS_CMD_PLOGI, cmdiocb, ndlp,
 467                                          NULL);
 468                 }
 469                 return 1;
 470         }
 471         /* Reject this request because invalid parameters */
 472         stat.un.b.lsRjtRsvd0 = 0;
 473         stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
 474         stat.un.b.lsRjtRsnCodeExp = LSEXP_SPARM_OPTIONS;
 475         stat.un.b.vendorUnique = 0;
 476         lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
 477
 478         /* 1 sec timeout */
 479         mod_timer(&ndlp->nlp_delayfunc, jiffies + HZ);
 480
 481         spin_lock_irq(shost->host_lock);
 482         ndlp->nlp_flag |= NLP_DELAY_TMO;
 483         spin_unlock_irq(shost->host_lock);
 484         ndlp->nlp_last_elscmd = ELS_CMD_PLOGI;
 485         ndlp->nlp_prev_state = ndlp->nlp_state;
 486         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
 487         return 0;
 488 }
 489
 490 static int
 491 lpfc_rcv_logo(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 492               struct lpfc_iocbq *cmdiocb, uint32_t els_cmd)
 493 {
 494         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
 495
 496         /* Put ndlp in NPR state with 1 sec timeout for plogi, ACC logo */
 497         /* Only call LOGO ACC for first LOGO, this avoids sending unnecessary
 498          * PLOGIs during LOGO storms from a device.
 499          */
 500         spin_lock_irq(shost->host_lock);
 501         ndlp->nlp_flag |= NLP_LOGO_ACC;
 502         spin_unlock_irq(shost->host_lock);
 503         if (els_cmd == ELS_CMD_PRLO)
 504                 lpfc_els_rsp_acc(vport, ELS_CMD_PRLO, cmdiocb, ndlp, NULL);
 505         else
 506                 lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
 507
 508         if ((!(ndlp->nlp_type & NLP_FABRIC) &&
 509              ((ndlp->nlp_type & NLP_FCP_TARGET) ||
 510               !(ndlp->nlp_type & NLP_FCP_INITIATOR))) ||
 511             (ndlp->nlp_state == NLP_STE_ADISC_ISSUE)) {
 512                 /* Only try to re-login if this is NOT a Fabric Node */
 513                 mod_timer(&ndlp->nlp_delayfunc, jiffies + HZ * 1);
 514                 spin_lock_irq(shost->host_lock);
 515                 ndlp->nlp_flag |= NLP_DELAY_TMO;
 516                 spin_unlock_irq(shost->host_lock);
 517
 518                 ndlp->nlp_last_elscmd = ELS_CMD_PLOGI;
 519         }
 520         ndlp->nlp_prev_state = ndlp->nlp_state;
 521         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
 522
 523         spin_lock_irq(shost->host_lock);
 524         ndlp->nlp_flag &= ~NLP_NPR_ADISC;
 525         spin_unlock_irq(shost->host_lock);
 526         /* The driver has to wait until the ACC completes before it continues
 527          * processing the LOGO.  The action will resume in
 528          * lpfc_cmpl_els_logo_acc routine. Since part of processing includes an
 529          * unreg_login, the driver waits so the ACC does not get aborted.
 530          */
 531         return 0;
 532 }
 533
 534 static void
 535 lpfc_rcv_prli(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 536               struct lpfc_iocbq *cmdiocb)
 537 {
 538         struct lpfc_dmabuf *pcmd;
 539         uint32_t *lp;
 540         PRLI *npr;
 541         struct fc_rport *rport = ndlp->rport;
 542         u32 roles;
 543
 544         pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
 545         lp = (uint32_t *) pcmd->virt;
 546         npr = (PRLI *) ((uint8_t *) lp + sizeof (uint32_t));
 547
 548         ndlp->nlp_type &= ~(NLP_FCP_TARGET | NLP_FCP_INITIATOR);
 549         ndlp->nlp_fcp_info &= ~NLP_FCP_2_DEVICE;
 550         if (npr->prliType == PRLI_FCP_TYPE) {
 551                 if (npr->initiatorFunc)
 552                         ndlp->nlp_type |= NLP_FCP_INITIATOR;
 553                 if (npr->targetFunc)
 554                         ndlp->nlp_type |= NLP_FCP_TARGET;
 555                 if (npr->Retry)
 556                         ndlp->nlp_fcp_info |= NLP_FCP_2_DEVICE;
 557         }
 558         if (rport) {
 559                 /* We need to update the rport role values */
 560                 roles = FC_RPORT_ROLE_UNKNOWN;
 561                 if (ndlp->nlp_type & NLP_FCP_INITIATOR)
 562                         roles |= FC_RPORT_ROLE_FCP_INITIATOR;
 563                 if (ndlp->nlp_type & NLP_FCP_TARGET)
 564                         roles |= FC_RPORT_ROLE_FCP_TARGET;
 565
 566                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_RPORT,
 567                         "rport rolechg:   role:x%x did:x%x flg:x%x",
 568                         roles, ndlp->nlp_DID, ndlp->nlp_flag);
 569
 570                 fc_remote_port_rolechg(rport, roles);
 571         }
 572 }
 573
 574 static uint32_t
 575 lpfc_disc_set_adisc(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
 576 {
 577         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
 578
 579         if (!ndlp->nlp_rpi) {
 580                 ndlp->nlp_flag &= ~NLP_NPR_ADISC;
 581                 return 0;
 582         }
 583
 584         if (!(vport->fc_flag & FC_PT2PT)) {
 585                 /* Check config parameter use-adisc or FCP-2 */
 586                 if ((vport->cfg_use_adisc && (vport->fc_flag & FC_RSCN_MODE)) ||
 587                     ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) {
 588                         spin_lock_irq(shost->host_lock);
 589                         ndlp->nlp_flag |= NLP_NPR_ADISC;
 590                         spin_unlock_irq(shost->host_lock);
 591                         return 1;
 592                 }
 593         }
 594         ndlp->nlp_flag &= ~NLP_NPR_ADISC;
 595         lpfc_unreg_rpi(vport, ndlp);
 596         return 0;
 597 }
 598
 599 static uint32_t
 600 lpfc_disc_illegal(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 601                   void *arg, uint32_t evt)
 602 {
 603         lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
 604                          "0271 Illegal State Transition: node x%x "
 605                          "event x%x, state x%x Data: x%x x%x\n",
 606                          ndlp->nlp_DID, evt, ndlp->nlp_state, ndlp->nlp_rpi,
 607                          ndlp->nlp_flag);
 608         return ndlp->nlp_state;
 609 }
 610
 611 static uint32_t
 612 lpfc_cmpl_plogi_illegal(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 613                   void *arg, uint32_t evt)
 614 {
 615         /* This transition is only legal if we previously
 616          * rcv'ed a PLOGI. Since we don't want 2 discovery threads
 617          * working on the same NPortID, do nothing for this thread
 618          * to stop it.
 619          */
 620         if (!(ndlp->nlp_flag & NLP_RCV_PLOGI)) {
 621                 lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
 622                          "0272 Illegal State Transition: node x%x "
 623                          "event x%x, state x%x Data: x%x x%x\n",
 624                          ndlp->nlp_DID, evt, ndlp->nlp_state, ndlp->nlp_rpi,
 625                          ndlp->nlp_flag);
 626         }
 627         return ndlp->nlp_state;
 628 }
 629
 630 /* Start of Discovery State Machine routines */
 631
 632 static uint32_t
 633 lpfc_rcv_plogi_unused_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 634                            void *arg, uint32_t evt)
 635 {
 636         struct lpfc_iocbq *cmdiocb;
 637
 638         cmdiocb = (struct lpfc_iocbq *) arg;
 639
 640         if (lpfc_rcv_plogi(vport, ndlp, cmdiocb)) {
 641                 return ndlp->nlp_state;
 642         }
 643         return NLP_STE_FREED_NODE;
 644 }
 645
 646 static uint32_t
 647 lpfc_rcv_els_unused_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 648                          void *arg, uint32_t evt)
 649 {
 650         lpfc_issue_els_logo(vport, ndlp, 0);
 651         return ndlp->nlp_state;
 652 }
 653
 654 static uint32_t
 655 lpfc_rcv_logo_unused_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 656                           void *arg, uint32_t evt)
 657 {
 658         struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
 659         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
 660
 661         spin_lock_irq(shost->host_lock);
 662         ndlp->nlp_flag |= NLP_LOGO_ACC;
 663         spin_unlock_irq(shost->host_lock);
 664         lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
 665
 666         return ndlp->nlp_state;
 667 }
 668
 669 static uint32_t
 670 lpfc_cmpl_logo_unused_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 671                            void *arg, uint32_t evt)
 672 {
 673         return NLP_STE_FREED_NODE;
 674 }
 675
 676 static uint32_t
 677 lpfc_device_rm_unused_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 678                            void *arg, uint32_t evt)
 679 {
 680         return NLP_STE_FREED_NODE;
 681 }
 682
 683 static uint32_t
 684 lpfc_rcv_plogi_plogi_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 685                            void *arg, uint32_t evt)
 686 {
 687         struct Scsi_Host   *shost = lpfc_shost_from_vport(vport);
 688         struct lpfc_hba   *phba = vport->phba;
 689         struct lpfc_iocbq *cmdiocb = arg;
 690         struct lpfc_dmabuf *pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
 691         uint32_t *lp = (uint32_t *) pcmd->virt;
 692         struct serv_parm *sp = (struct serv_parm *) (lp + 1);
 693         struct ls_rjt stat;
 694         int port_cmp;
 695
 696         memset(&stat, 0, sizeof (struct ls_rjt));
 697
 698         /* For a PLOGI, we only accept if our portname is less
 699          * than the remote portname.
 700          */
 701         phba->fc_stat.elsLogiCol++;
 702         port_cmp = memcmp(&vport->fc_portname, &sp->portName,
 703                           sizeof(struct lpfc_name));
 704
 705         if (port_cmp >= 0) {
 706                 /* Reject this request because the remote node will accept
 707                    ours */
 708                 stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
 709                 stat.un.b.lsRjtRsnCodeExp = LSEXP_CMD_IN_PROGRESS;
 710                 lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp,
 711                         NULL);
 712         } else {
 713                 if (lpfc_rcv_plogi(vport, ndlp, cmdiocb) &&
 714                     (ndlp->nlp_flag & NLP_NPR_2B_DISC) &&
 715                     (vport->num_disc_nodes)) {
 716                         spin_lock_irq(shost->host_lock);
 717                         ndlp->nlp_flag &= ~NLP_NPR_2B_DISC;
 718                         spin_unlock_irq(shost->host_lock);
 719                         /* Check if there are more PLOGIs to be sent */
 720                         lpfc_more_plogi(vport);
 721                         if (vport->num_disc_nodes == 0) {
 722                                 spin_lock_irq(shost->host_lock);
 723                                 vport->fc_flag &= ~FC_NDISC_ACTIVE;
 724                                 spin_unlock_irq(shost->host_lock);
 725                                 lpfc_can_disctmo(vport);
 726                                 lpfc_end_rscn(vport);
 727                         }
 728                 }
 729         } /* If our portname was less */
 730
 731         return ndlp->nlp_state;
 732 }
 733
 734 static uint32_t
 735 lpfc_rcv_prli_plogi_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 736                           void *arg, uint32_t evt)
 737 {
 738         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
 739         struct ls_rjt     stat;
 740
 741         memset(&stat, 0, sizeof (struct ls_rjt));
 742         stat.un.b.lsRjtRsnCode = LSRJT_LOGICAL_BSY;
 743         stat.un.b.lsRjtRsnCodeExp = LSEXP_NOTHING_MORE;
 744         lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
 745         return ndlp->nlp_state;
 746 }
 747
 748 static uint32_t
 749 lpfc_rcv_logo_plogi_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 750                           void *arg, uint32_t evt)
 751 {
 752         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
 753
 754                                 /* software abort outstanding PLOGI */
 755         lpfc_els_abort(vport->phba, ndlp);
 756
 757         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_LOGO);
 758         return ndlp->nlp_state;
 759 }
 760
 761 static uint32_t
 762 lpfc_rcv_els_plogi_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 763                          void *arg, uint32_t evt)
 764 {
 765         struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
 766         struct lpfc_hba   *phba = vport->phba;
 767         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
 768
 769         /* software abort outstanding PLOGI */
 770         lpfc_els_abort(phba, ndlp);
 771
 772         if (evt == NLP_EVT_RCV_LOGO) {
 773                 lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
 774         } else {
 775                 lpfc_issue_els_logo(vport, ndlp, 0);
 776         }
 777
 778         /* Put ndlp in npr state set plogi timer for 1 sec */
 779         mod_timer(&ndlp->nlp_delayfunc, jiffies + HZ * 1);
 780         spin_lock_irq(shost->host_lock);
 781         ndlp->nlp_flag |= NLP_DELAY_TMO;
 782         spin_unlock_irq(shost->host_lock);
 783         ndlp->nlp_last_elscmd = ELS_CMD_PLOGI;
 784         ndlp->nlp_prev_state = NLP_STE_PLOGI_ISSUE;
 785         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
 786
 787         return ndlp->nlp_state;
 788 }
 789
 790 static uint32_t
 791 lpfc_cmpl_plogi_plogi_issue(struct lpfc_vport *vport,
 792                             struct lpfc_nodelist *ndlp,
 793                             void *arg,
 794                             uint32_t evt)
 795 {
 796         struct lpfc_hba    *phba = vport->phba;
 797         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
 798         struct lpfc_iocbq  *cmdiocb, *rspiocb;
 799         struct lpfc_dmabuf *pcmd, *prsp, *mp;
 800         uint32_t *lp;
 801         IOCB_t *irsp;
 802         struct serv_parm *sp;
 803         LPFC_MBOXQ_t *mbox;
 804
 805         cmdiocb = (struct lpfc_iocbq *) arg;
 806         rspiocb = cmdiocb->context_un.rsp_iocb;
 807
 808         if (ndlp->nlp_flag & NLP_ACC_REGLOGIN) {
 809                 /* Recovery from PLOGI collision logic */
 810                 return ndlp->nlp_state;
 811         }
 812
 813         irsp = &rspiocb->iocb;
 814
 815         if (irsp->ulpStatus)
 816                 goto out;
 817
 818         pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
 819
 820         prsp = list_get_first(&pcmd->list, struct lpfc_dmabuf, list);
 821
 822         lp = (uint32_t *) prsp->virt;
 823         sp = (struct serv_parm *) ((uint8_t *) lp + sizeof (uint32_t));
 824
 825         /* Some switches have FDMI servers returning 0 for WWN */
 826         if ((ndlp->nlp_DID != FDMI_DID) &&
 827                 (wwn_to_u64(sp->portName.u.wwn) == 0 ||
 828                 wwn_to_u64(sp->nodeName.u.wwn) == 0)) {
 829                 lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
 830                                  "0142 PLOGI RSP: Invalid WWN.\n");
 831                 goto out;
 832         }
 833         if (!lpfc_check_sparm(vport, ndlp, sp, CLASS3))
 834                 goto out;
 835         /* PLOGI chkparm OK */
 836         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
 837                          "0121 PLOGI chkparm OK Data: x%x x%x x%x x%x\n",
 838                          ndlp->nlp_DID, ndlp->nlp_state,
 839                          ndlp->nlp_flag, ndlp->nlp_rpi);
 840         if (vport->cfg_fcp_class == 2 && (sp->cls2.classValid))
 841                 ndlp->nlp_fcp_info |= CLASS2;
 842         else
 843                 ndlp->nlp_fcp_info |= CLASS3;
 844
 845         ndlp->nlp_class_sup = 0;
 846         if (sp->cls1.classValid)
 847                 ndlp->nlp_class_sup |= FC_COS_CLASS1;
 848         if (sp->cls2.classValid)
 849                 ndlp->nlp_class_sup |= FC_COS_CLASS2;
 850         if (sp->cls3.classValid)
 851                 ndlp->nlp_class_sup |= FC_COS_CLASS3;
 852         if (sp->cls4.classValid)
 853                 ndlp->nlp_class_sup |= FC_COS_CLASS4;
 854         ndlp->nlp_maxframe =
 855                 ((sp->cmn.bbRcvSizeMsb & 0x0F) << 8) | sp->cmn.bbRcvSizeLsb;
 856
 857         mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
 858         if (!mbox) {
 859                 lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
 860                         "0133 PLOGI: no memory for reg_login "
 861                         "Data: x%x x%x x%x x%x\n",
 862                         ndlp->nlp_DID, ndlp->nlp_state,
 863                         ndlp->nlp_flag, ndlp->nlp_rpi);
 864                 goto out;
 865         }
 866
 867         lpfc_unreg_rpi(vport, ndlp);
 868
 869         if (lpfc_reg_login(phba, vport->vpi, irsp->un.elsreq64.remoteID,
 870                            (uint8_t *) sp, mbox, 0) == 0) {
 871                 switch (ndlp->nlp_DID) {
 872                 case NameServer_DID:
 873                         mbox->mbox_cmpl = lpfc_mbx_cmpl_ns_reg_login;
 874                         break;
 875                 case FDMI_DID:
 876                         mbox->mbox_cmpl = lpfc_mbx_cmpl_fdmi_reg_login;
 877                         break;
 878                 default:
 879                         mbox->mbox_cmpl = lpfc_mbx_cmpl_reg_login;
 880                 }
 881                 mbox->context2 = lpfc_nlp_get(ndlp);
 882                 mbox->vport = vport;
 883                 if (lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT)
 884                     != MBX_NOT_FINISHED) {
 885                         lpfc_nlp_set_state(vport, ndlp,
 886                                            NLP_STE_REG_LOGIN_ISSUE);
 887                         return ndlp->nlp_state;
 888                 }
 889                 /* decrement node reference count to the failed mbox
 890                  * command
 891                  */
 892                 lpfc_nlp_put(ndlp);
 893                 mp = (struct lpfc_dmabuf *) mbox->context1;
 894                 lpfc_mbuf_free(phba, mp->virt, mp->phys);
 895                 kfree(mp);
 896                 mempool_free(mbox, phba->mbox_mem_pool);
 897
 898                 lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
 899                                  "0134 PLOGI: cannot issue reg_login "
 900                                  "Data: x%x x%x x%x x%x\n",
 901                                  ndlp->nlp_DID, ndlp->nlp_state,
 902                                  ndlp->nlp_flag, ndlp->nlp_rpi);
 903         } else {
 904                 mempool_free(mbox, phba->mbox_mem_pool);
 905
 906                 lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
 907                                  "0135 PLOGI: cannot format reg_login "
 908                                  "Data: x%x x%x x%x x%x\n",
 909                                  ndlp->nlp_DID, ndlp->nlp_state,
 910                                  ndlp->nlp_flag, ndlp->nlp_rpi);
 911         }
 912
 913
 914 out:
 915         if (ndlp->nlp_DID == NameServer_DID) {
 916                 lpfc_vport_set_state(vport, FC_VPORT_FAILED);
 917                 lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
 918                                  "0261 Cannot Register NameServer login\n");
 919         }
 920
 921         spin_lock_irq(shost->host_lock);
 922         ndlp->nlp_flag |= NLP_DEFER_RM;
 923         spin_unlock_irq(shost->host_lock);
 924         return NLP_STE_FREED_NODE;
 925 }
 926
 927 static uint32_t
 928 lpfc_cmpl_logo_plogi_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 929                            void *arg, uint32_t evt)
 930 {
 931         return ndlp->nlp_state;
 932 }
 933
 934 static uint32_t
 935 lpfc_cmpl_reglogin_plogi_issue(struct lpfc_vport *vport,
 936         struct lpfc_nodelist *ndlp, void *arg, uint32_t evt)
 937 {
 938         return ndlp->nlp_state;
 939 }
 940
 941 static uint32_t
 942 lpfc_device_rm_plogi_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 943                            void *arg, uint32_t evt)
 944 {
 945         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
 946
 947         if (ndlp->nlp_flag & NLP_NPR_2B_DISC) {
 948                 spin_lock_irq(shost->host_lock);
 949                 ndlp->nlp_flag |= NLP_NODEV_REMOVE;
 950                 spin_unlock_irq(shost->host_lock);
 951                 return ndlp->nlp_state;
 952         } else {
 953                 /* software abort outstanding PLOGI */
 954                 lpfc_els_abort(vport->phba, ndlp);
 955
 956                 lpfc_drop_node(vport, ndlp);
 957                 return NLP_STE_FREED_NODE;
 958         }
 959 }
 960
 961 static uint32_t
 962 lpfc_device_recov_plogi_issue(struct lpfc_vport *vport,
 963                               struct lpfc_nodelist *ndlp,
 964                               void *arg,
 965                               uint32_t evt)
 966 {
 967         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
 968         struct lpfc_hba  *phba = vport->phba;
 969
 970         /* Don't do anything that will mess up processing of the
 971          * previous RSCN.
 972          */
 973         if (vport->fc_flag & FC_RSCN_DEFERRED)
 974                 return ndlp->nlp_state;
 975
 976         /* software abort outstanding PLOGI */
 977         lpfc_els_abort(phba, ndlp);
 978
 979         ndlp->nlp_prev_state = NLP_STE_PLOGI_ISSUE;
 980         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
 981         spin_lock_irq(shost->host_lock);
 982         ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
 983         spin_unlock_irq(shost->host_lock);
 984
 985         return ndlp->nlp_state;
 986 }
 987
 988 static uint32_t
 989 lpfc_rcv_plogi_adisc_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 990                            void *arg, uint32_t evt)
 991 {
 992         struct Scsi_Host   *shost = lpfc_shost_from_vport(vport);
 993         struct lpfc_hba   *phba = vport->phba;
 994         struct lpfc_iocbq *cmdiocb;
 995
 996         /* software abort outstanding ADISC */
 997         lpfc_els_abort(phba, ndlp);
 998
 999         cmdiocb = (struct lpfc_iocbq *) arg;
1000
1001         if (lpfc_rcv_plogi(vport, ndlp, cmdiocb)) {
1002                 if (ndlp->nlp_flag & NLP_NPR_2B_DISC) {
1003                         spin_lock_irq(shost->host_lock);
1004                         ndlp->nlp_flag &= ~NLP_NPR_2B_DISC;
1005                         spin_unlock_irq(shost->host_lock);
1006
1007                         if (vport->num_disc_nodes) {
1008                                 lpfc_more_adisc(vport);
1009                                 if ((vport->num_disc_nodes == 0) &&
1010                                     (vport->fc_npr_cnt))
1011                                         lpfc_els_disc_plogi(vport);
1012                                 if (vport->num_disc_nodes == 0) {
1013                                         spin_lock_irq(shost->host_lock);
1014                                         vport->fc_flag &= ~FC_NDISC_ACTIVE;
1015                                         spin_unlock_irq(shost->host_lock);
1016                                         lpfc_can_disctmo(vport);
1017                                         lpfc_end_rscn(vport);
1018                                 }
1019                         }
1020                 }
1021                 return ndlp->nlp_state;
1022         }
1023         ndlp->nlp_prev_state = NLP_STE_ADISC_ISSUE;
1024         lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0);
1025         lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
1026
1027         return ndlp->nlp_state;
1028 }
1029
1030 static uint32_t
1031 lpfc_rcv_prli_adisc_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1032                           void *arg, uint32_t evt)
1033 {
1034         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1035
1036         lpfc_els_rsp_prli_acc(vport, cmdiocb, ndlp);
1037         return ndlp->nlp_state;
1038 }
1039
1040 static uint32_t
1041 lpfc_rcv_logo_adisc_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1042                           void *arg, uint32_t evt)
1043 {
1044         struct lpfc_hba *phba = vport->phba;
1045         struct lpfc_iocbq *cmdiocb;
1046
1047         cmdiocb = (struct lpfc_iocbq *) arg;
1048
1049         /* software abort outstanding ADISC */
1050         lpfc_els_abort(phba, ndlp);
1051
1052         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_LOGO);
1053         return ndlp->nlp_state;
1054 }
1055
1056 static uint32_t
1057 lpfc_rcv_padisc_adisc_issue(struct lpfc_vport *vport,
1058                             struct lpfc_nodelist *ndlp,
1059                             void *arg, uint32_t evt)
1060 {
1061         struct lpfc_iocbq *cmdiocb;
1062
1063         cmdiocb = (struct lpfc_iocbq *) arg;
1064
1065         lpfc_rcv_padisc(vport, ndlp, cmdiocb);
1066         return ndlp->nlp_state;
1067 }
1068
1069 static uint32_t
1070 lpfc_rcv_prlo_adisc_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1071                           void *arg, uint32_t evt)
1072 {
1073         struct lpfc_iocbq *cmdiocb;
1074
1075         cmdiocb = (struct lpfc_iocbq *) arg;
1076
1077         /* Treat like rcv logo */
1078         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_PRLO);
1079         return ndlp->nlp_state;
1080 }
1081
1082 static uint32_t
1083 lpfc_cmpl_adisc_adisc_issue(struct lpfc_vport *vport,
1084                             struct lpfc_nodelist *ndlp,
1085                             void *arg, uint32_t evt)
1086 {
1087         struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
1088         struct lpfc_hba   *phba = vport->phba;
1089         struct lpfc_iocbq *cmdiocb, *rspiocb;
1090         IOCB_t *irsp;
1091         ADISC *ap;
1092
1093         cmdiocb = (struct lpfc_iocbq *) arg;
1094         rspiocb = cmdiocb->context_un.rsp_iocb;
1095
1096         ap = (ADISC *)lpfc_check_elscmpl_iocb(phba, cmdiocb, rspiocb);
1097         irsp = &rspiocb->iocb;
1098
1099         if ((irsp->ulpStatus) ||
1100             (!lpfc_check_adisc(vport, ndlp, &ap->nodeName, &ap->portName))) {
1101                 /* 1 sec timeout */
1102                 mod_timer(&ndlp->nlp_delayfunc, jiffies + HZ);
1103                 spin_lock_irq(shost->host_lock);
1104                 ndlp->nlp_flag |= NLP_DELAY_TMO;
1105                 spin_unlock_irq(shost->host_lock);
1106                 ndlp->nlp_last_elscmd = ELS_CMD_PLOGI;
1107
1108                 memset(&ndlp->nlp_nodename, 0, sizeof(struct lpfc_name));
1109                 memset(&ndlp->nlp_portname, 0, sizeof(struct lpfc_name));
1110
1111                 ndlp->nlp_prev_state = NLP_STE_ADISC_ISSUE;
1112                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1113                 lpfc_unreg_rpi(vport, ndlp);
1114                 return ndlp->nlp_state;
1115         }
1116
1117         if (ndlp->nlp_type & NLP_FCP_TARGET) {
1118                 ndlp->nlp_prev_state = NLP_STE_ADISC_ISSUE;
1119                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_MAPPED_NODE);
1120         } else {
1121                 ndlp->nlp_prev_state = NLP_STE_ADISC_ISSUE;
1122                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
1123         }
1124         return ndlp->nlp_state;
1125 }
1126
1127 static uint32_t
1128 lpfc_device_rm_adisc_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1129                            void *arg, uint32_t evt)
1130 {
1131         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1132
1133         if (ndlp->nlp_flag & NLP_NPR_2B_DISC) {
1134                 spin_lock_irq(shost->host_lock);
1135                 ndlp->nlp_flag |= NLP_NODEV_REMOVE;
1136                 spin_unlock_irq(shost->host_lock);
1137                 return ndlp->nlp_state;
1138         } else {
1139                 /* software abort outstanding ADISC */
1140                 lpfc_els_abort(vport->phba, ndlp);
1141
1142                 lpfc_drop_node(vport, ndlp);
1143                 return NLP_STE_FREED_NODE;
1144         }
1145 }
1146
1147 static uint32_t
1148 lpfc_device_recov_adisc_issue(struct lpfc_vport *vport,
1149                               struct lpfc_nodelist *ndlp,
1150                               void *arg,
1151                               uint32_t evt)
1152 {
1153         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1154         struct lpfc_hba  *phba = vport->phba;
1155
1156         /* Don't do anything that will mess up processing of the
1157          * previous RSCN.
1158          */
1159         if (vport->fc_flag & FC_RSCN_DEFERRED)
1160                 return ndlp->nlp_state;
1161
1162         /* software abort outstanding ADISC */
1163         lpfc_els_abort(phba, ndlp);
1164
1165         ndlp->nlp_prev_state = NLP_STE_ADISC_ISSUE;
1166         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1167         spin_lock_irq(shost->host_lock);
1168         ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
1169         spin_unlock_irq(shost->host_lock);
1170         lpfc_disc_set_adisc(vport, ndlp);
1171         return ndlp->nlp_state;
1172 }
1173
1174 static uint32_t
1175 lpfc_rcv_plogi_reglogin_issue(struct lpfc_vport *vport,
1176                               struct lpfc_nodelist *ndlp,
1177                               void *arg,
1178                               uint32_t evt)
1179 {
1180         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1181
1182         lpfc_rcv_plogi(vport, ndlp, cmdiocb);
1183         return ndlp->nlp_state;
1184 }
1185
1186 static uint32_t
1187 lpfc_rcv_prli_reglogin_issue(struct lpfc_vport *vport,
1188                              struct lpfc_nodelist *ndlp,
1189                              void *arg,
1190                              uint32_t evt)
1191 {
1192         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1193
1194         lpfc_els_rsp_prli_acc(vport, cmdiocb, ndlp);
1195         return ndlp->nlp_state;
1196 }
1197
1198 static uint32_t
1199 lpfc_rcv_logo_reglogin_issue(struct lpfc_vport *vport,
1200                              struct lpfc_nodelist *ndlp,
1201                              void *arg,
1202                              uint32_t evt)
1203 {
1204         struct lpfc_hba   *phba = vport->phba;
1205         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1206         LPFC_MBOXQ_t      *mb;
1207         LPFC_MBOXQ_t      *nextmb;
1208         struct lpfc_dmabuf *mp;
1209
1210         cmdiocb = (struct lpfc_iocbq *) arg;
1211
1212         /* cleanup any ndlp on mbox q waiting for reglogin cmpl */
1213         if ((mb = phba->sli.mbox_active)) {
1214                 if ((mb->mb.mbxCommand == MBX_REG_LOGIN64) &&
1215                    (ndlp == (struct lpfc_nodelist *) mb->context2)) {
1216                         lpfc_nlp_put(ndlp);
1217                         mb->context2 = NULL;
1218                         mb->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
1219                 }
1220         }
1221
1222         spin_lock_irq(&phba->hbalock);
1223         list_for_each_entry_safe(mb, nextmb, &phba->sli.mboxq, list) {
1224                 if ((mb->mb.mbxCommand == MBX_REG_LOGIN64) &&
1225                    (ndlp == (struct lpfc_nodelist *) mb->context2)) {
1226                         mp = (struct lpfc_dmabuf *) (mb->context1);
1227                         if (mp) {
1228                                 __lpfc_mbuf_free(phba, mp->virt, mp->phys);
1229                                 kfree(mp);
1230                         }
1231                         lpfc_nlp_put(ndlp);
1232                         list_del(&mb->list);
1233                         mempool_free(mb, phba->mbox_mem_pool);
1234                 }
1235         }
1236         spin_unlock_irq(&phba->hbalock);
1237
1238         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_LOGO);
1239         return ndlp->nlp_state;
1240 }
1241
1242 static uint32_t
1243 lpfc_rcv_padisc_reglogin_issue(struct lpfc_vport *vport,
1244                                struct lpfc_nodelist *ndlp,
1245                                void *arg,
1246                                uint32_t evt)
1247 {
1248         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1249
1250         lpfc_rcv_padisc(vport, ndlp, cmdiocb);
1251         return ndlp->nlp_state;
1252 }
1253
1254 static uint32_t
1255 lpfc_rcv_prlo_reglogin_issue(struct lpfc_vport *vport,
1256                              struct lpfc_nodelist *ndlp,
1257                              void *arg,
1258                              uint32_t evt)
1259 {
1260         struct lpfc_iocbq *cmdiocb;
1261
1262         cmdiocb = (struct lpfc_iocbq *) arg;
1263         lpfc_els_rsp_acc(vport, ELS_CMD_PRLO, cmdiocb, ndlp, NULL);
1264         return ndlp->nlp_state;
1265 }
1266
1267 static uint32_t
1268 lpfc_cmpl_reglogin_reglogin_issue(struct lpfc_vport *vport,
1269                                   struct lpfc_nodelist *ndlp,
1270                                   void *arg,
1271                                   uint32_t evt)
1272 {
1273         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1274         LPFC_MBOXQ_t *pmb = (LPFC_MBOXQ_t *) arg;
1275         MAILBOX_t *mb = &pmb->mb;
1276         uint32_t did  = mb->un.varWords[1];
1277
1278         if (mb->mbxStatus) {
1279                 /* RegLogin failed */
1280                 lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
1281                                 "0246 RegLogin failed Data: x%x x%x x%x\n",
1282                                 did, mb->mbxStatus, vport->port_state);
1283                 /*
1284                  * If RegLogin failed due to lack of HBA resources do not
1285                  * retry discovery.
1286                  */
1287                 if (mb->mbxStatus == MBXERR_RPI_FULL) {
1288                         ndlp->nlp_prev_state = NLP_STE_REG_LOGIN_ISSUE;
1289                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1290                         return ndlp->nlp_state;
1291                 }
1292
1293                 /* Put ndlp in npr state set plogi timer for 1 sec */
1294                 mod_timer(&ndlp->nlp_delayfunc, jiffies + HZ * 1);
1295                 spin_lock_irq(shost->host_lock);
1296                 ndlp->nlp_flag |= NLP_DELAY_TMO;
1297                 spin_unlock_irq(shost->host_lock);
1298                 ndlp->nlp_last_elscmd = ELS_CMD_PLOGI;
1299
1300                 lpfc_issue_els_logo(vport, ndlp, 0);
1301                 ndlp->nlp_prev_state = NLP_STE_REG_LOGIN_ISSUE;
1302                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1303                 return ndlp->nlp_state;
1304         }
1305
1306         ndlp->nlp_rpi = mb->un.varWords[0];
1307
1308         /* Only if we are not a fabric nport do we issue PRLI */
1309         if (!(ndlp->nlp_type & NLP_FABRIC)) {
1310                 ndlp->nlp_prev_state = NLP_STE_REG_LOGIN_ISSUE;
1311                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_PRLI_ISSUE);
1312                 lpfc_issue_els_prli(vport, ndlp, 0);
1313         } else {
1314                 ndlp->nlp_prev_state = NLP_STE_REG_LOGIN_ISSUE;
1315                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
1316         }
1317         return ndlp->nlp_state;
1318 }
1319
1320 static uint32_t
1321 lpfc_device_rm_reglogin_issue(struct lpfc_vport *vport,
1322                               struct lpfc_nodelist *ndlp,
1323                               void *arg,
1324                               uint32_t evt)
1325 {
1326         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1327
1328         if (ndlp->nlp_flag & NLP_NPR_2B_DISC) {
1329                 spin_lock_irq(shost->host_lock);
1330                 ndlp->nlp_flag |= NLP_NODEV_REMOVE;
1331                 spin_unlock_irq(shost->host_lock);
1332                 return ndlp->nlp_state;
1333         } else {
1334                 lpfc_drop_node(vport, ndlp);
1335                 return NLP_STE_FREED_NODE;
1336         }
1337 }
1338
1339 static uint32_t
1340 lpfc_device_recov_reglogin_issue(struct lpfc_vport *vport,
1341                                  struct lpfc_nodelist *ndlp,
1342                                  void *arg,
1343                                  uint32_t evt)
1344 {
1345         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1346
1347         /* Don't do anything that will mess up processing of the
1348          * previous RSCN.
1349          */
1350         if (vport->fc_flag & FC_RSCN_DEFERRED)
1351                 return ndlp->nlp_state;
1352
1353         ndlp->nlp_prev_state = NLP_STE_REG_LOGIN_ISSUE;
1354         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1355         spin_lock_irq(shost->host_lock);
1356         ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
1357         spin_unlock_irq(shost->host_lock);
1358         lpfc_disc_set_adisc(vport, ndlp);
1359         return ndlp->nlp_state;
1360 }
1361
1362 static uint32_t
1363 lpfc_rcv_plogi_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1364                           void *arg, uint32_t evt)
1365 {
1366         struct lpfc_iocbq *cmdiocb;
1367
1368         cmdiocb = (struct lpfc_iocbq *) arg;
1369
1370         lpfc_rcv_plogi(vport, ndlp, cmdiocb);
1371         return ndlp->nlp_state;
1372 }
1373
1374 static uint32_t
1375 lpfc_rcv_prli_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1376                          void *arg, uint32_t evt)
1377 {
1378         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1379
1380         lpfc_els_rsp_prli_acc(vport, cmdiocb, ndlp);
1381         return ndlp->nlp_state;
1382 }
1383
1384 static uint32_t
1385 lpfc_rcv_logo_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1386                          void *arg, uint32_t evt)
1387 {
1388         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1389
1390         /* Software abort outstanding PRLI before sending acc */
1391         lpfc_els_abort(vport->phba, ndlp);
1392
1393         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_LOGO);
1394         return ndlp->nlp_state;
1395 }
1396
1397 static uint32_t
1398 lpfc_rcv_padisc_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1399                            void *arg, uint32_t evt)
1400 {
1401         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1402
1403         lpfc_rcv_padisc(vport, ndlp, cmdiocb);
1404         return ndlp->nlp_state;
1405 }
1406
1407 /* This routine is envoked when we rcv a PRLO request from a nport
1408  * we are logged into.  We should send back a PRLO rsp setting the
1409  * appropriate bits.
1410  * NEXT STATE = PRLI_ISSUE
1411  */
1412 static uint32_t
1413 lpfc_rcv_prlo_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1414                          void *arg, uint32_t evt)
1415 {
1416         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1417
1418         lpfc_els_rsp_acc(vport, ELS_CMD_PRLO, cmdiocb, ndlp, NULL);
1419         return ndlp->nlp_state;
1420 }
1421
1422 static uint32_t
1423 lpfc_cmpl_prli_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1424                           void *arg, uint32_t evt)
1425 {
1426         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1427         struct lpfc_iocbq *cmdiocb, *rspiocb;
1428         struct lpfc_hba   *phba = vport->phba;
1429         IOCB_t *irsp;
1430         PRLI *npr;
1431
1432         cmdiocb = (struct lpfc_iocbq *) arg;
1433         rspiocb = cmdiocb->context_un.rsp_iocb;
1434         npr = (PRLI *)lpfc_check_elscmpl_iocb(phba, cmdiocb, rspiocb);
1435
1436         irsp = &rspiocb->iocb;
1437         if (irsp->ulpStatus) {
1438                 if ((vport->port_type == LPFC_NPIV_PORT) &&
1439                     vport->cfg_restrict_login) {
1440                         goto out;
1441                 }
1442                 ndlp->nlp_prev_state = NLP_STE_PRLI_ISSUE;
1443                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
1444                 return ndlp->nlp_state;
1445         }
1446
1447         /* Check out PRLI rsp */
1448         ndlp->nlp_type &= ~(NLP_FCP_TARGET | NLP_FCP_INITIATOR);
1449         ndlp->nlp_fcp_info &= ~NLP_FCP_2_DEVICE;
1450         if ((npr->acceptRspCode == PRLI_REQ_EXECUTED) &&
1451             (npr->prliType == PRLI_FCP_TYPE)) {
1452                 if (npr->initiatorFunc)
1453                         ndlp->nlp_type |= NLP_FCP_INITIATOR;
1454                 if (npr->targetFunc)
1455                         ndlp->nlp_type |= NLP_FCP_TARGET;
1456                 if (npr->Retry)
1457                         ndlp->nlp_fcp_info |= NLP_FCP_2_DEVICE;
1458         }
1459         if (!(ndlp->nlp_type & NLP_FCP_TARGET) &&
1460             (vport->port_type == LPFC_NPIV_PORT) &&
1461              vport->cfg_restrict_login) {
1462 out:
1463                 spin_lock_irq(shost->host_lock);
1464                 ndlp->nlp_flag |= NLP_TARGET_REMOVE;
1465                 spin_unlock_irq(shost->host_lock);
1466                 lpfc_issue_els_logo(vport, ndlp, 0);
1467
1468                 ndlp->nlp_prev_state = NLP_STE_PRLI_ISSUE;
1469                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1470                 return ndlp->nlp_state;
1471         }
1472
1473         ndlp->nlp_prev_state = NLP_STE_PRLI_ISSUE;
1474         if (ndlp->nlp_type & NLP_FCP_TARGET)
1475                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_MAPPED_NODE);
1476         else
1477                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
1478         return ndlp->nlp_state;
1479 }
1480
1481 /*! lpfc_device_rm_prli_issue
1482  *
1483  * \pre
1484  * \post
1485  * \param   phba
1486  * \param   ndlp
1487  * \param   arg
1488  * \param   evt
1489  * \return  uint32_t
1490  *
1491  * \b Description:
1492  *    This routine is envoked when we a request to remove a nport we are in the
1493  *    process of PRLIing. We should software abort outstanding prli, unreg
1494  *    login, send a logout. We will change node state to UNUSED_NODE, put it
1495  *    on plogi list so it can be freed when LOGO completes.
1496  *
1497  */
1498
1499 static uint32_t
1500 lpfc_device_rm_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1501                           void *arg, uint32_t evt)
1502 {
1503         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1504
1505         if (ndlp->nlp_flag & NLP_NPR_2B_DISC) {
1506                 spin_lock_irq(shost->host_lock);
1507                 ndlp->nlp_flag |= NLP_NODEV_REMOVE;
1508                 spin_unlock_irq(shost->host_lock);
1509                 return ndlp->nlp_state;
1510         } else {
1511                 /* software abort outstanding PLOGI */
1512                 lpfc_els_abort(vport->phba, ndlp);
1513
1514                 lpfc_drop_node(vport, ndlp);
1515                 return NLP_STE_FREED_NODE;
1516         }
1517 }
1518
1519
1520 /*! lpfc_device_recov_prli_issue
1521  *
1522  * \pre
1523  * \post
1524  * \param   phba
1525  * \param   ndlp
1526  * \param   arg
1527  * \param   evt
1528  * \return  uint32_t
1529  *
1530  * \b Description:
1531  *    The routine is envoked when the state of a device is unknown, like
1532  *    during a link down. We should remove the nodelist entry from the
1533  *    unmapped list, issue a UNREG_LOGIN, do a software abort of the
1534  *    outstanding PRLI command, then free the node entry.
1535  */
1536 static uint32_t
1537 lpfc_device_recov_prli_issue(struct lpfc_vport *vport,
1538                              struct lpfc_nodelist *ndlp,
1539                              void *arg,
1540                              uint32_t evt)
1541 {
1542         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1543         struct lpfc_hba  *phba = vport->phba;
1544
1545         /* Don't do anything that will mess up processing of the
1546          * previous RSCN.
1547          */
1548         if (vport->fc_flag & FC_RSCN_DEFERRED)
1549                 return ndlp->nlp_state;
1550
1551         /* software abort outstanding PRLI */
1552         lpfc_els_abort(phba, ndlp);
1553
1554         ndlp->nlp_prev_state = NLP_STE_PRLI_ISSUE;
1555         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1556         spin_lock_irq(shost->host_lock);
1557         ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
1558         spin_unlock_irq(shost->host_lock);
1559         lpfc_disc_set_adisc(vport, ndlp);
1560         return ndlp->nlp_state;
1561 }
1562
1563 static uint32_t
1564 lpfc_rcv_plogi_unmap_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1565                           void *arg, uint32_t evt)
1566 {
1567         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1568
1569         lpfc_rcv_plogi(vport, ndlp, cmdiocb);
1570         return ndlp->nlp_state;
1571 }
1572
1573 static uint32_t
1574 lpfc_rcv_prli_unmap_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1575                          void *arg, uint32_t evt)
1576 {
1577         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1578
1579         lpfc_rcv_prli(vport, ndlp, cmdiocb);
1580         lpfc_els_rsp_prli_acc(vport, cmdiocb, ndlp);
1581         return ndlp->nlp_state;
1582 }
1583
1584 static uint32_t
1585 lpfc_rcv_logo_unmap_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1586                          void *arg, uint32_t evt)
1587 {
1588         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1589
1590         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_LOGO);
1591         return ndlp->nlp_state;
1592 }
1593
1594 static uint32_t
1595 lpfc_rcv_padisc_unmap_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1596                            void *arg, uint32_t evt)
1597 {
1598         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1599
1600         lpfc_rcv_padisc(vport, ndlp, cmdiocb);
1601         return ndlp->nlp_state;
1602 }
1603
1604 static uint32_t
1605 lpfc_rcv_prlo_unmap_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1606                          void *arg, uint32_t evt)
1607 {
1608         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1609
1610         lpfc_els_rsp_acc(vport, ELS_CMD_PRLO, cmdiocb, ndlp, NULL);
1611         return ndlp->nlp_state;
1612 }
1613
1614 static uint32_t
1615 lpfc_device_recov_unmap_node(struct lpfc_vport *vport,
1616                              struct lpfc_nodelist *ndlp,
1617                              void *arg,
1618                              uint32_t evt)
1619 {
1620         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1621
1622         ndlp->nlp_prev_state = NLP_STE_UNMAPPED_NODE;
1623         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1624         spin_lock_irq(shost->host_lock);
1625         ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
1626         spin_unlock_irq(shost->host_lock);
1627         lpfc_disc_set_adisc(vport, ndlp);
1628
1629         return ndlp->nlp_state;
1630 }
1631
1632 static uint32_t
1633 lpfc_rcv_plogi_mapped_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1634                            void *arg, uint32_t evt)
1635 {
1636         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1637
1638         lpfc_rcv_plogi(vport, ndlp, cmdiocb);
1639         return ndlp->nlp_state;
1640 }
1641
1642 static uint32_t
1643 lpfc_rcv_prli_mapped_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1644                           void *arg, uint32_t evt)
1645 {
1646         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1647
1648         lpfc_els_rsp_prli_acc(vport, cmdiocb, ndlp);
1649         return ndlp->nlp_state;
1650 }
1651
1652 static uint32_t
1653 lpfc_rcv_logo_mapped_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1654                           void *arg, uint32_t evt)
1655 {
1656         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1657
1658         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_LOGO);
1659         return ndlp->nlp_state;
1660 }
1661
1662 static uint32_t
1663 lpfc_rcv_padisc_mapped_node(struct lpfc_vport *vport,
1664                             struct lpfc_nodelist *ndlp,
1665                             void *arg, uint32_t evt)
1666 {
1667         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1668
1669         lpfc_rcv_padisc(vport, ndlp, cmdiocb);
1670         return ndlp->nlp_state;
1671 }
1672
1673 static uint32_t
1674 lpfc_rcv_prlo_mapped_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1675                           void *arg, uint32_t evt)
1676 {
1677         struct lpfc_hba  *phba = vport->phba;
1678         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1679
1680         /* flush the target */
1681         lpfc_sli_abort_iocb(vport, &phba->sli.ring[phba->sli.fcp_ring],
1682                             ndlp->nlp_sid, 0, LPFC_CTX_TGT);
1683
1684         /* Treat like rcv logo */
1685         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_PRLO);
1686         return ndlp->nlp_state;
1687 }
1688
1689 static uint32_t
1690 lpfc_device_recov_mapped_node(struct lpfc_vport *vport,
1691                               struct lpfc_nodelist *ndlp,
1692                               void *arg,
1693                               uint32_t evt)
1694 {
1695         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1696
1697         ndlp->nlp_prev_state = NLP_STE_MAPPED_NODE;
1698         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1699         spin_lock_irq(shost->host_lock);
1700         ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
1701         spin_unlock_irq(shost->host_lock);
1702         lpfc_disc_set_adisc(vport, ndlp);
1703         return ndlp->nlp_state;
1704 }
1705
1706 static uint32_t
1707 lpfc_rcv_plogi_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1708                         void *arg, uint32_t evt)
1709 {
1710         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1711         struct lpfc_iocbq *cmdiocb  = (struct lpfc_iocbq *) arg;
1712
1713         /* Ignore PLOGI if we have an outstanding LOGO */
1714         if (ndlp->nlp_flag & (NLP_LOGO_SND | NLP_LOGO_ACC))
1715                 return ndlp->nlp_state;
1716         if (lpfc_rcv_plogi(vport, ndlp, cmdiocb)) {
1717                 lpfc_cancel_retry_delay_tmo(vport, ndlp);
1718                 spin_lock_irq(shost->host_lock);
1719                 ndlp->nlp_flag &= ~(NLP_NPR_ADISC | NLP_NPR_2B_DISC);
1720                 spin_unlock_irq(shost->host_lock);
1721         } else if (!(ndlp->nlp_flag & NLP_NPR_2B_DISC)) {
1722                 /* send PLOGI immediately, move to PLOGI issue state */
1723                 if (!(ndlp->nlp_flag & NLP_DELAY_TMO)) {
1724                         ndlp->nlp_prev_state = NLP_STE_NPR_NODE;
1725                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
1726                         lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0);
1727                 }
1728         }
1729         return ndlp->nlp_state;
1730 }
1731
1732 static uint32_t
1733 lpfc_rcv_prli_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1734                        void *arg, uint32_t evt)
1735 {
1736         struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
1737         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1738         struct ls_rjt     stat;
1739
1740         memset(&stat, 0, sizeof (struct ls_rjt));
1741         stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
1742         stat.un.b.lsRjtRsnCodeExp = LSEXP_NOTHING_MORE;
1743         lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
1744
1745         if (!(ndlp->nlp_flag & NLP_DELAY_TMO)) {
1746                 if (ndlp->nlp_flag & NLP_NPR_ADISC) {
1747                         spin_lock_irq(shost->host_lock);
1748                         ndlp->nlp_flag &= ~NLP_NPR_ADISC;
1749                         ndlp->nlp_prev_state = NLP_STE_NPR_NODE;
1750                         spin_unlock_irq(shost->host_lock);
1751                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_ADISC_ISSUE);
1752                         lpfc_issue_els_adisc(vport, ndlp, 0);
1753                 } else {
1754                         ndlp->nlp_prev_state = NLP_STE_NPR_NODE;
1755                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
1756                         lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0);
1757                 }
1758         }
1759         return ndlp->nlp_state;
1760 }
1761
1762 static uint32_t
1763 lpfc_rcv_logo_npr_node(struct lpfc_vport *vport,  struct lpfc_nodelist *ndlp,
1764                        void *arg, uint32_t evt)
1765 {
1766         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1767
1768         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_LOGO);
1769         return ndlp->nlp_state;
1770 }
1771
1772 static uint32_t
1773 lpfc_rcv_padisc_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1774                          void *arg, uint32_t evt)
1775 {
1776         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1777
1778         lpfc_rcv_padisc(vport, ndlp, cmdiocb);
1779         /*
1780          * Do not start discovery if discovery is about to start
1781          * or discovery in progress for this node. Starting discovery
1782          * here will affect the counting of discovery threads.
1783          */
1784         if (!(ndlp->nlp_flag & NLP_DELAY_TMO) &&
1785             !(ndlp->nlp_flag & NLP_NPR_2B_DISC)) {
1786                 if (ndlp->nlp_flag & NLP_NPR_ADISC) {
1787                         ndlp->nlp_flag &= ~NLP_NPR_ADISC;
1788                         ndlp->nlp_prev_state = NLP_STE_NPR_NODE;
1789                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_ADISC_ISSUE);
1790                         lpfc_issue_els_adisc(vport, ndlp, 0);
1791                 } else {
1792                         ndlp->nlp_prev_state = NLP_STE_NPR_NODE;
1793                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
1794                         lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0);
1795                 }
1796         }
1797         return ndlp->nlp_state;
1798 }
1799
1800 static uint32_t
1801 lpfc_rcv_prlo_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1802                        void *arg, uint32_t evt)
1803 {
1804         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1805         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1806
1807         spin_lock_irq(shost->host_lock);
1808         ndlp->nlp_flag |= NLP_LOGO_ACC;
1809         spin_unlock_irq(shost->host_lock);
1810
1811         lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
1812
1813         if ((ndlp->nlp_flag & NLP_DELAY_TMO) == 0) {
1814                 mod_timer(&ndlp->nlp_delayfunc, jiffies + HZ * 1);
1815                 spin_lock_irq(shost->host_lock);
1816                 ndlp->nlp_flag |= NLP_DELAY_TMO;
1817                 ndlp->nlp_flag &= ~NLP_NPR_ADISC;
1818                 spin_unlock_irq(shost->host_lock);
1819                 ndlp->nlp_last_elscmd = ELS_CMD_PLOGI;
1820         } else {
1821                 spin_lock_irq(shost->host_lock);
1822                 ndlp->nlp_flag &= ~NLP_NPR_ADISC;
1823                 spin_unlock_irq(shost->host_lock);
1824         }
1825         return ndlp->nlp_state;
1826 }
1827
1828 static uint32_t
1829 lpfc_cmpl_plogi_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1830                          void *arg, uint32_t evt)
1831 {
1832         struct lpfc_iocbq *cmdiocb, *rspiocb;
1833         IOCB_t *irsp;
1834
1835         cmdiocb = (struct lpfc_iocbq *) arg;
1836         rspiocb = cmdiocb->context_un.rsp_iocb;
1837
1838         irsp = &rspiocb->iocb;
1839         if (irsp->ulpStatus) {
1840                 ndlp->nlp_flag |= NLP_DEFER_RM;
1841                 return NLP_STE_FREED_NODE;
1842         }
1843         return ndlp->nlp_state;
1844 }
1845
1846 static uint32_t
1847 lpfc_cmpl_prli_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1848                         void *arg, uint32_t evt)
1849 {
1850         struct lpfc_iocbq *cmdiocb, *rspiocb;
1851         IOCB_t *irsp;
1852
1853         cmdiocb = (struct lpfc_iocbq *) arg;
1854         rspiocb = cmdiocb->context_un.rsp_iocb;
1855
1856         irsp = &rspiocb->iocb;
1857         if (irsp->ulpStatus && (ndlp->nlp_flag & NLP_NODEV_REMOVE)) {
1858                 lpfc_drop_node(vport, ndlp);
1859                 return NLP_STE_FREED_NODE;
1860         }
1861         return ndlp->nlp_state;
1862 }
1863
1864 static uint32_t
1865 lpfc_cmpl_logo_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1866                         void *arg, uint32_t evt)
1867 {
1868         lpfc_unreg_rpi(vport, ndlp);
1869         /* This routine does nothing, just return the current state */
1870         return ndlp->nlp_state;
1871 }
1872
1873 static uint32_t
1874 lpfc_cmpl_adisc_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1875                          void *arg, uint32_t evt)
1876 {
1877         struct lpfc_iocbq *cmdiocb, *rspiocb;
1878         IOCB_t *irsp;
1879
1880         cmdiocb = (struct lpfc_iocbq *) arg;
1881         rspiocb = cmdiocb->context_un.rsp_iocb;
1882
1883         irsp = &rspiocb->iocb;
1884         if (irsp->ulpStatus && (ndlp->nlp_flag & NLP_NODEV_REMOVE)) {
1885                 lpfc_drop_node(vport, ndlp);
1886                 return NLP_STE_FREED_NODE;
1887         }
1888         return ndlp->nlp_state;
1889 }
1890
1891 static uint32_t
1892 lpfc_cmpl_reglogin_npr_node(struct lpfc_vport *vport,
1893                             struct lpfc_nodelist *ndlp,
1894                             void *arg, uint32_t evt)
1895 {
1896         LPFC_MBOXQ_t *pmb = (LPFC_MBOXQ_t *) arg;
1897         MAILBOX_t    *mb = &pmb->mb;
1898
1899         if (!mb->mbxStatus)
1900                 ndlp->nlp_rpi = mb->un.varWords[0];
1901         else {
1902                 if (ndlp->nlp_flag & NLP_NODEV_REMOVE) {
1903                         lpfc_drop_node(vport, ndlp);
1904                         return NLP_STE_FREED_NODE;
1905                 }
1906         }
1907         return ndlp->nlp_state;
1908 }
1909
1910 static uint32_t
1911 lpfc_device_rm_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1912                         void *arg, uint32_t evt)
1913 {
1914         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1915
1916         if (ndlp->nlp_flag & NLP_NPR_2B_DISC) {
1917                 spin_lock_irq(shost->host_lock);
1918                 ndlp->nlp_flag |= NLP_NODEV_REMOVE;
1919                 spin_unlock_irq(shost->host_lock);
1920                 return ndlp->nlp_state;
1921         }
1922         lpfc_drop_node(vport, ndlp);
1923         return NLP_STE_FREED_NODE;
1924 }
1925
1926 static uint32_t
1927 lpfc_device_recov_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1928                            void *arg, uint32_t evt)
1929 {
1930         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1931
1932         /* Don't do anything that will mess up processing of the
1933          * previous RSCN.
1934          */
1935         if (vport->fc_flag & FC_RSCN_DEFERRED)
1936                 return ndlp->nlp_state;
1937
1938         spin_lock_irq(shost->host_lock);
1939         ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
1940         spin_unlock_irq(shost->host_lock);
1941         lpfc_cancel_retry_delay_tmo(vport, ndlp);
1942         return ndlp->nlp_state;
1943 }
1944
1945
1946 /* This next section defines the NPort Discovery State Machine */
1947
1948 /* There are 4 different double linked lists nodelist entries can reside on.
1949  * The plogi list and adisc list are used when Link Up discovery or RSCN
1950  * processing is needed. Each list holds the nodes that we will send PLOGI
1951  * or ADISC on. These lists will keep track of what nodes will be effected
1952  * by an RSCN, or a Link Up (Typically, all nodes are effected on Link Up).
1953  * The unmapped_list will contain all nodes that we have successfully logged
1954  * into at the Fibre Channel level. The mapped_list will contain all nodes
1955  * that are mapped FCP targets.
1956  */
1957 /*
1958  * The bind list is a list of undiscovered (potentially non-existent) nodes
1959  * that we have saved binding information on. This information is used when
1960  * nodes transition from the unmapped to the mapped list.
1961  */
1962 /* For UNUSED_NODE state, the node has just been allocated .
1963  * For PLOGI_ISSUE and REG_LOGIN_ISSUE, the node is on
1964  * the PLOGI list. For REG_LOGIN_COMPL, the node is taken off the PLOGI list
1965  * and put on the unmapped list. For ADISC processing, the node is taken off
1966  * the ADISC list and placed on either the mapped or unmapped list (depending
1967  * on its previous state). Once on the unmapped list, a PRLI is issued and the
1968  * state changed to PRLI_ISSUE. When the PRLI completion occurs, the state is
1969  * changed to UNMAPPED_NODE. If the completion indicates a mapped
1970  * node, the node is taken off the unmapped list. The binding list is checked
1971  * for a valid binding, or a binding is automatically assigned. If binding
1972  * assignment is unsuccessful, the node is left on the unmapped list. If
1973  * binding assignment is successful, the associated binding list entry (if
1974  * any) is removed, and the node is placed on the mapped list.
1975  */
1976 /*
1977  * For a Link Down, all nodes on the ADISC, PLOGI, unmapped or mapped
1978  * lists will receive a DEVICE_RECOVERY event. If the linkdown or devloss timers
1979  * expire, all effected nodes will receive a DEVICE_RM event.
1980  */
1981 /*
1982  * For a Link Up or RSCN, all nodes will move from the mapped / unmapped lists
1983  * to either the ADISC or PLOGI list.  After a Nameserver query or ALPA loopmap
1984  * check, additional nodes may be added or removed (via DEVICE_RM) to / from
1985  * the PLOGI or ADISC lists. Once the PLOGI and ADISC lists are populated,
1986  * we will first process the ADISC list.  32 entries are processed initially and
1987  * ADISC is initited for each one.  Completions / Events for each node are
1988  * funnelled thru the state machine.  As each node finishes ADISC processing, it
1989  * starts ADISC for any nodes waiting for ADISC processing. If no nodes are
1990  * waiting, and the ADISC list count is identically 0, then we are done. For
1991  * Link Up discovery, since all nodes on the PLOGI list are UNREG_LOGIN'ed, we
1992  * can issue a CLEAR_LA and reenable Link Events. Next we will process the PLOGI
1993  * list.  32 entries are processed initially and PLOGI is initited for each one.
1994  * Completions / Events for each node are funnelled thru the state machine.  As
1995  * each node finishes PLOGI processing, it starts PLOGI for any nodes waiting
1996  * for PLOGI processing. If no nodes are waiting, and the PLOGI list count is
1997  * indentically 0, then we are done. We have now completed discovery / RSCN
1998  * handling. Upon completion, ALL nodes should be on either the mapped or
1999  * unmapped lists.
2000  */
2001
2002 static uint32_t (*lpfc_disc_action[NLP_STE_MAX_STATE * NLP_EVT_MAX_EVENT])
2003      (struct lpfc_vport *, struct lpfc_nodelist *, void *, uint32_t) = {
2004         /* Action routine                  Event       Current State  */
2005         lpfc_rcv_plogi_unused_node,     /* RCV_PLOGI   UNUSED_NODE    */
2006         lpfc_rcv_els_unused_node,       /* RCV_PRLI        */
2007         lpfc_rcv_logo_unused_node,      /* RCV_LOGO        */
2008         lpfc_rcv_els_unused_node,       /* RCV_ADISC       */
2009         lpfc_rcv_els_unused_node,       /* RCV_PDISC       */
2010         lpfc_rcv_els_unused_node,       /* RCV_PRLO        */
2011         lpfc_disc_illegal,              /* CMPL_PLOGI      */
2012         lpfc_disc_illegal,              /* CMPL_PRLI       */
2013         lpfc_cmpl_logo_unused_node,     /* CMPL_LOGO       */
2014         lpfc_disc_illegal,              /* CMPL_ADISC      */
2015         lpfc_disc_illegal,              /* CMPL_REG_LOGIN  */
2016         lpfc_device_rm_unused_node,     /* DEVICE_RM       */
2017         lpfc_disc_illegal,              /* DEVICE_RECOVERY */
2018
2019         lpfc_rcv_plogi_plogi_issue,     /* RCV_PLOGI   PLOGI_ISSUE    */
2020         lpfc_rcv_prli_plogi_issue,      /* RCV_PRLI        */
2021         lpfc_rcv_logo_plogi_issue,      /* RCV_LOGO        */
2022         lpfc_rcv_els_plogi_issue,       /* RCV_ADISC       */
2023         lpfc_rcv_els_plogi_issue,       /* RCV_PDISC       */
2024         lpfc_rcv_els_plogi_issue,       /* RCV_PRLO        */
2025         lpfc_cmpl_plogi_plogi_issue,    /* CMPL_PLOGI      */
2026         lpfc_disc_illegal,              /* CMPL_PRLI       */
2027         lpfc_cmpl_logo_plogi_issue,     /* CMPL_LOGO       */
2028         lpfc_disc_illegal,              /* CMPL_ADISC      */
2029         lpfc_cmpl_reglogin_plogi_issue,/* CMPL_REG_LOGIN  */
2030         lpfc_device_rm_plogi_issue,     /* DEVICE_RM       */
2031         lpfc_device_recov_plogi_issue,  /* DEVICE_RECOVERY */
2032
2033         lpfc_rcv_plogi_adisc_issue,     /* RCV_PLOGI   ADISC_ISSUE    */
2034         lpfc_rcv_prli_adisc_issue,      /* RCV_PRLI        */
2035         lpfc_rcv_logo_adisc_issue,      /* RCV_LOGO        */
2036         lpfc_rcv_padisc_adisc_issue,    /* RCV_ADISC       */
2037         lpfc_rcv_padisc_adisc_issue,    /* RCV_PDISC       */
2038         lpfc_rcv_prlo_adisc_issue,      /* RCV_PRLO        */
2039         lpfc_disc_illegal,              /* CMPL_PLOGI      */
2040         lpfc_disc_illegal,              /* CMPL_PRLI       */
2041         lpfc_disc_illegal,              /* CMPL_LOGO       */
2042         lpfc_cmpl_adisc_adisc_issue,    /* CMPL_ADISC      */
2043         lpfc_disc_illegal,              /* CMPL_REG_LOGIN  */
2044         lpfc_device_rm_adisc_issue,     /* DEVICE_RM       */
2045         lpfc_device_recov_adisc_issue,  /* DEVICE_RECOVERY */
2046
2047         lpfc_rcv_plogi_reglogin_issue,  /* RCV_PLOGI  REG_LOGIN_ISSUE */
2048         lpfc_rcv_prli_reglogin_issue,   /* RCV_PLOGI       */
2049         lpfc_rcv_logo_reglogin_issue,   /* RCV_LOGO        */
2050         lpfc_rcv_padisc_reglogin_issue, /* RCV_ADISC       */
2051         lpfc_rcv_padisc_reglogin_issue, /* RCV_PDISC       */
2052         lpfc_rcv_prlo_reglogin_issue,   /* RCV_PRLO        */
2053         lpfc_cmpl_plogi_illegal,        /* CMPL_PLOGI      */
2054         lpfc_disc_illegal,              /* CMPL_PRLI       */
2055         lpfc_disc_illegal,              /* CMPL_LOGO       */
2056         lpfc_disc_illegal,              /* CMPL_ADISC      */
2057         lpfc_cmpl_reglogin_reglogin_issue,/* CMPL_REG_LOGIN  */
2058         lpfc_device_rm_reglogin_issue,  /* DEVICE_RM       */
2059         lpfc_device_recov_reglogin_issue,/* DEVICE_RECOVERY */
2060
2061         lpfc_rcv_plogi_prli_issue,      /* RCV_PLOGI   PRLI_ISSUE     */
2062         lpfc_rcv_prli_prli_issue,       /* RCV_PRLI        */
2063         lpfc_rcv_logo_prli_issue,       /* RCV_LOGO        */
2064         lpfc_rcv_padisc_prli_issue,     /* RCV_ADISC       */
2065         lpfc_rcv_padisc_prli_issue,     /* RCV_PDISC       */
2066         lpfc_rcv_prlo_prli_issue,       /* RCV_PRLO        */
2067         lpfc_cmpl_plogi_illegal,        /* CMPL_PLOGI      */
2068         lpfc_cmpl_prli_prli_issue,      /* CMPL_PRLI       */
2069         lpfc_disc_illegal,              /* CMPL_LOGO       */
2070         lpfc_disc_illegal,              /* CMPL_ADISC      */
2071         lpfc_disc_illegal,              /* CMPL_REG_LOGIN  */
2072         lpfc_device_rm_prli_issue,      /* DEVICE_RM       */
2073         lpfc_device_recov_prli_issue,   /* DEVICE_RECOVERY */
2074
2075         lpfc_rcv_plogi_unmap_node,      /* RCV_PLOGI   UNMAPPED_NODE  */
2076         lpfc_rcv_prli_unmap_node,       /* RCV_PRLI        */
2077         lpfc_rcv_logo_unmap_node,       /* RCV_LOGO        */
2078         lpfc_rcv_padisc_unmap_node,     /* RCV_ADISC       */
2079         lpfc_rcv_padisc_unmap_node,     /* RCV_PDISC       */
2080         lpfc_rcv_prlo_unmap_node,       /* RCV_PRLO        */
2081         lpfc_disc_illegal,              /* CMPL_PLOGI      */
2082         lpfc_disc_illegal,              /* CMPL_PRLI       */
2083         lpfc_disc_illegal,              /* CMPL_LOGO       */
2084         lpfc_disc_illegal,              /* CMPL_ADISC      */
2085         lpfc_disc_illegal,              /* CMPL_REG_LOGIN  */
2086         lpfc_disc_illegal,              /* DEVICE_RM       */
2087         lpfc_device_recov_unmap_node,   /* DEVICE_RECOVERY */
2088
2089         lpfc_rcv_plogi_mapped_node,     /* RCV_PLOGI   MAPPED_NODE    */
2090         lpfc_rcv_prli_mapped_node,      /* RCV_PRLI        */
2091         lpfc_rcv_logo_mapped_node,      /* RCV_LOGO        */
2092         lpfc_rcv_padisc_mapped_node,    /* RCV_ADISC       */
2093         lpfc_rcv_padisc_mapped_node,    /* RCV_PDISC       */
2094         lpfc_rcv_prlo_mapped_node,      /* RCV_PRLO        */
2095         lpfc_disc_illegal,              /* CMPL_PLOGI      */
2096         lpfc_disc_illegal,              /* CMPL_PRLI       */
2097         lpfc_disc_illegal,              /* CMPL_LOGO       */
2098         lpfc_disc_illegal,              /* CMPL_ADISC      */
2099         lpfc_disc_illegal,              /* CMPL_REG_LOGIN  */
2100         lpfc_disc_illegal,              /* DEVICE_RM       */
2101         lpfc_device_recov_mapped_node,  /* DEVICE_RECOVERY */
2102
2103         lpfc_rcv_plogi_npr_node,        /* RCV_PLOGI   NPR_NODE    */
2104         lpfc_rcv_prli_npr_node,         /* RCV_PRLI        */
2105         lpfc_rcv_logo_npr_node,         /* RCV_LOGO        */
2106         lpfc_rcv_padisc_npr_node,       /* RCV_ADISC       */
2107         lpfc_rcv_padisc_npr_node,       /* RCV_PDISC       */
2108         lpfc_rcv_prlo_npr_node,         /* RCV_PRLO        */
2109         lpfc_cmpl_plogi_npr_node,       /* CMPL_PLOGI      */
2110         lpfc_cmpl_prli_npr_node,        /* CMPL_PRLI       */
2111         lpfc_cmpl_logo_npr_node,        /* CMPL_LOGO       */
2112         lpfc_cmpl_adisc_npr_node,       /* CMPL_ADISC      */
2113         lpfc_cmpl_reglogin_npr_node,    /* CMPL_REG_LOGIN  */
2114         lpfc_device_rm_npr_node,        /* DEVICE_RM       */
2115         lpfc_device_recov_npr_node,     /* DEVICE_RECOVERY */
2116 };
2117
2118 int
2119 lpfc_disc_state_machine(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
2120                         void *arg, uint32_t evt)
2121 {
2122         uint32_t cur_state, rc;
2123         uint32_t(*func) (struct lpfc_vport *, struct lpfc_nodelist *, void *,
2124                          uint32_t);
2125         uint32_t got_ndlp = 0;
2126
2127         if (lpfc_nlp_get(ndlp))
2128                 got_ndlp = 1;
2129
2130         cur_state = ndlp->nlp_state;
2131
2132         /* DSM in event <evt> on NPort <nlp_DID> in state <cur_state> */
2133         lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
2134                          "0211 DSM in event x%x on NPort x%x in "
2135                          "state %d Data: x%x\n",
2136                          evt, ndlp->nlp_DID, cur_state, ndlp->nlp_flag);
2137
2138         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_DSM,
2139                  "DSM in:          evt:%d ste:%d did:x%x",
2140                 evt, cur_state, ndlp->nlp_DID);
2141
2142         func = lpfc_disc_action[(cur_state * NLP_EVT_MAX_EVENT) + evt];
2143         rc = (func) (vport, ndlp, arg, evt);
2144
2145         /* DSM out state <rc> on NPort <nlp_DID> */
2146         if (got_ndlp) {
2147                 lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
2148                          "0212 DSM out state %d on NPort x%x Data: x%x\n",
2149                          rc, ndlp->nlp_DID, ndlp->nlp_flag);
2150
2151                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_DSM,
2152                         "DSM out:         ste:%d did:x%x flg:x%x",
2153                         rc, ndlp->nlp_DID, ndlp->nlp_flag);
2154                 /* Decrement the ndlp reference count held for this function */
2155                 lpfc_nlp_put(ndlp);
2156         } else {
2157                 lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
2158                         "0212 DSM out state %d on NPort free\n", rc);
2159
2160                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_DSM,
2161                         "DSM out:         ste:%d did:x%x flg:x%x",
2162                         rc, 0, 0);
2163         }
2164
2165         return rc;
2166 }