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) 2004-2009 Emulex.  All rights reserved.           *
   5  * EMULEX and SLI are trademarks of Emulex.                        *
   6  * www.emulex.com                                                  *
   7  * Portions Copyright (C) 2004-2005 Christoph Hellwig              *
   8  *                                                                 *
   9  * This program is free software; you can redistribute it and/or   *
  10  * modify it under the terms of version 2 of the GNU General       *
  11  * Public License as published by the Free Software Foundation.    *
  12  * This program is distributed in the hope that it will be useful. *
  13  * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND          *
  14  * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,  *
  15  * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE      *
  16  * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
  17  * TO BE LEGALLY INVALID.  See the GNU General Public License for  *
  18  * more details, a copy of which can be found in the file COPYING  *
  19  * included with this package.                                     *
  20  *******************************************************************/
  21
  22 #include <linux/blkdev.h>
  23 #include <linux/pci.h>
  24 #include <linux/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_hw4.h"
  32 #include "lpfc_hw.h"
  33 #include "lpfc_sli.h"
  34 #include "lpfc_sli4.h"
  35 #include "lpfc_nl.h"
  36 #include "lpfc_disc.h"
  37 #include "lpfc_scsi.h"
  38 #include "lpfc.h"
  39 #include "lpfc_logmsg.h"
  40 #include "lpfc_crtn.h"
  41 #include "lpfc_vport.h"
  42 #include "lpfc_debugfs.h"
  43
  44
  45 /* Called to verify a rcv'ed ADISC was intended for us. */
  46 static int
  47 lpfc_check_adisc(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
  48                  struct lpfc_name *nn, struct lpfc_name *pn)
  49 {
  50         /* Compare the ADISC rsp WWNN / WWPN matches our internal node
  51          * table entry for that node.
  52          */
  53         if (memcmp(nn, &ndlp->nlp_nodename, sizeof (struct lpfc_name)))
  54                 return 0;
  55
  56         if (memcmp(pn, &ndlp->nlp_portname, sizeof (struct lpfc_name)))
  57                 return 0;
  58
  59         /* we match, return success */
  60         return 1;
  61 }
  62
  63 int
  64 lpfc_check_sparm(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
  65                  struct serv_parm * sp, uint32_t class)
  66 {
  67         volatile struct serv_parm *hsp = &vport->fc_sparam;
  68         uint16_t hsp_value, ssp_value = 0;
  69
  70         /*
  71          * The receive data field size and buffer-to-buffer receive data field
  72          * size entries are 16 bits but are represented as two 8-bit fields in
  73          * the driver data structure to account for rsvd bits and other control
  74          * bits.  Reconstruct and compare the fields as a 16-bit values before
  75          * correcting the byte values.
  76          */
  77         if (sp->cls1.classValid) {
  78                 hsp_value = (hsp->cls1.rcvDataSizeMsb << 8) |
  79                                 hsp->cls1.rcvDataSizeLsb;
  80                 ssp_value = (sp->cls1.rcvDataSizeMsb << 8) |
  81                                 sp->cls1.rcvDataSizeLsb;
  82                 if (!ssp_value)
  83                         goto bad_service_param;
  84                 if (ssp_value > hsp_value) {
  85                         sp->cls1.rcvDataSizeLsb = hsp->cls1.rcvDataSizeLsb;
  86                         sp->cls1.rcvDataSizeMsb = hsp->cls1.rcvDataSizeMsb;
  87                 }
  88         } else if (class == CLASS1) {
  89                 goto bad_service_param;
  90         }
  91
  92         if (sp->cls2.classValid) {
  93                 hsp_value = (hsp->cls2.rcvDataSizeMsb << 8) |
  94                                 hsp->cls2.rcvDataSizeLsb;
  95                 ssp_value = (sp->cls2.rcvDataSizeMsb << 8) |
  96                                 sp->cls2.rcvDataSizeLsb;
  97                 if (!ssp_value)
  98                         goto bad_service_param;
  99                 if (ssp_value > hsp_value) {
 100                         sp->cls2.rcvDataSizeLsb = hsp->cls2.rcvDataSizeLsb;
 101                         sp->cls2.rcvDataSizeMsb = hsp->cls2.rcvDataSizeMsb;
 102                 }
 103         } else if (class == CLASS2) {
 104                 goto bad_service_param;
 105         }
 106
 107         if (sp->cls3.classValid) {
 108                 hsp_value = (hsp->cls3.rcvDataSizeMsb << 8) |
 109                                 hsp->cls3.rcvDataSizeLsb;
 110                 ssp_value = (sp->cls3.rcvDataSizeMsb << 8) |
 111                                 sp->cls3.rcvDataSizeLsb;
 112                 if (!ssp_value)
 113                         goto bad_service_param;
 114                 if (ssp_value > hsp_value) {
 115                         sp->cls3.rcvDataSizeLsb = hsp->cls3.rcvDataSizeLsb;
 116                         sp->cls3.rcvDataSizeMsb = hsp->cls3.rcvDataSizeMsb;
 117                 }
 118         } else if (class == CLASS3) {
 119                 goto bad_service_param;
 120         }
 121
 122         /*
 123          * Preserve the upper four bits of the MSB from the PLOGI response.
 124          * These bits contain the Buffer-to-Buffer State Change Number
 125          * from the target and need to be passed to the FW.
 126          */
 127         hsp_value = (hsp->cmn.bbRcvSizeMsb << 8) | hsp->cmn.bbRcvSizeLsb;
 128         ssp_value = (sp->cmn.bbRcvSizeMsb << 8) | sp->cmn.bbRcvSizeLsb;
 129         if (ssp_value > hsp_value) {
 130                 sp->cmn.bbRcvSizeLsb = hsp->cmn.bbRcvSizeLsb;
 131                 sp->cmn.bbRcvSizeMsb = (sp->cmn.bbRcvSizeMsb & 0xF0) |
 132                                        (hsp->cmn.bbRcvSizeMsb & 0x0F);
 133         }
 134
 135         memcpy(&ndlp->nlp_nodename, &sp->nodeName, sizeof (struct lpfc_name));
 136         memcpy(&ndlp->nlp_portname, &sp->portName, sizeof (struct lpfc_name));
 137         return 1;
 138 bad_service_param:
 139         lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
 140                          "0207 Device %x "
 141                          "(%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x) sent "
 142                          "invalid service parameters.  Ignoring device.\n",
 143                          ndlp->nlp_DID,
 144                          sp->nodeName.u.wwn[0], sp->nodeName.u.wwn[1],
 145                          sp->nodeName.u.wwn[2], sp->nodeName.u.wwn[3],
 146                          sp->nodeName.u.wwn[4], sp->nodeName.u.wwn[5],
 147                          sp->nodeName.u.wwn[6], sp->nodeName.u.wwn[7]);
 148         return 0;
 149 }
 150
 151 static void *
 152 lpfc_check_elscmpl_iocb(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
 153                         struct lpfc_iocbq *rspiocb)
 154 {
 155         struct lpfc_dmabuf *pcmd, *prsp;
 156         uint32_t *lp;
 157         void     *ptr = NULL;
 158         IOCB_t   *irsp;
 159
 160         irsp = &rspiocb->iocb;
 161         pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
 162
 163         /* For lpfc_els_abort, context2 could be zero'ed to delay
 164          * freeing associated memory till after ABTS completes.
 165          */
 166         if (pcmd) {
 167                 prsp =  list_get_first(&pcmd->list, struct lpfc_dmabuf,
 168                                        list);
 169                 if (prsp) {
 170                         lp = (uint32_t *) prsp->virt;
 171                         ptr = (void *)((uint8_t *)lp + sizeof(uint32_t));
 172                 }
 173         } else {
 174                 /* Force ulpStatus error since we are returning NULL ptr */
 175                 if (!(irsp->ulpStatus)) {
 176                         irsp->ulpStatus = IOSTAT_LOCAL_REJECT;
 177                         irsp->un.ulpWord[4] = IOERR_SLI_ABORTED;
 178                 }
 179                 ptr = NULL;
 180         }
 181         return ptr;
 182 }
 183
 184
 185 /*
 186  * Free resources / clean up outstanding I/Os
 187  * associated with a LPFC_NODELIST entry. This
 188  * routine effectively results in a "software abort".
 189  */
 190 int
 191 lpfc_els_abort(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
 192 {
 193         LIST_HEAD(completions);
 194         struct lpfc_sli  *psli = &phba->sli;
 195         struct lpfc_sli_ring *pring = &psli->ring[LPFC_ELS_RING];
 196         struct lpfc_iocbq *iocb, *next_iocb;
 197
 198         /* Abort outstanding I/O on NPort <nlp_DID> */
 199         lpfc_printf_vlog(ndlp->vport, KERN_INFO, LOG_DISCOVERY,
 200                          "0205 Abort outstanding I/O on NPort x%x "
 201                          "Data: x%x x%x x%x\n",
 202                          ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_state,
 203                          ndlp->nlp_rpi);
 204
 205         lpfc_fabric_abort_nport(ndlp);
 206
 207         /* First check the txq */
 208         spin_lock_irq(&phba->hbalock);
 209         list_for_each_entry_safe(iocb, next_iocb, &pring->txq, list) {
 210                 /* Check to see if iocb matches the nport we are looking for */
 211                 if (lpfc_check_sli_ndlp(phba, pring, iocb, ndlp)) {
 212                         /* It matches, so deque and call compl with anp error */
 213                         list_move_tail(&iocb->list, &completions);
 214                         pring->txq_cnt--;
 215                 }
 216         }
 217
 218         /* Next check the txcmplq */
 219         list_for_each_entry_safe(iocb, next_iocb, &pring->txcmplq, list) {
 220                 /* Check to see if iocb matches the nport we are looking for */
 221                 if (lpfc_check_sli_ndlp(phba, pring, iocb, ndlp)) {
 222                         lpfc_sli_issue_abort_iotag(phba, pring, iocb);
 223                 }
 224         }
 225         spin_unlock_irq(&phba->hbalock);
 226
 227         /* Cancel all the IOCBs from the completions list */
 228         lpfc_sli_cancel_iocbs(phba, &completions, IOSTAT_LOCAL_REJECT,
 229                               IOERR_SLI_ABORTED);
 230
 231         lpfc_cancel_retry_delay_tmo(phba->pport, ndlp);
 232         return 0;
 233 }
 234
 235 static int
 236 lpfc_rcv_plogi(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 237                struct lpfc_iocbq *cmdiocb)
 238 {
 239         struct Scsi_Host   *shost = lpfc_shost_from_vport(vport);
 240         struct lpfc_hba    *phba = vport->phba;
 241         struct lpfc_dmabuf *pcmd;
 242         uint32_t *lp;
 243         IOCB_t *icmd;
 244         struct serv_parm *sp;
 245         LPFC_MBOXQ_t *mbox;
 246         struct ls_rjt stat;
 247         int rc;
 248
 249         memset(&stat, 0, sizeof (struct ls_rjt));
 250         if (vport->port_state <= LPFC_FLOGI) {
 251                 /* Before responding to PLOGI, check for pt2pt mode.
 252                  * If we are pt2pt, with an outstanding FLOGI, abort
 253                  * the FLOGI and resend it first.
 254                  */
 255                 if (vport->fc_flag & FC_PT2PT) {
 256                          lpfc_els_abort_flogi(phba);
 257                         if (!(vport->fc_flag & FC_PT2PT_PLOGI)) {
 258                                 /* If the other side is supposed to initiate
 259                                  * the PLOGI anyway, just ACC it now and
 260                                  * move on with discovery.
 261                                  */
 262                                 phba->fc_edtov = FF_DEF_EDTOV;
 263                                 phba->fc_ratov = FF_DEF_RATOV;
 264                                 /* Start discovery - this should just do
 265                                    CLEAR_LA */
 266                                 lpfc_disc_start(vport);
 267                         } else
 268                                 lpfc_initial_flogi(vport);
 269                 } else {
 270                         stat.un.b.lsRjtRsnCode = LSRJT_LOGICAL_BSY;
 271                         stat.un.b.lsRjtRsnCodeExp = LSEXP_NOTHING_MORE;
 272                         lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb,
 273                                             ndlp, NULL);
 274                         return 0;
 275                 }
 276         }
 277         pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
 278         lp = (uint32_t *) pcmd->virt;
 279         sp = (struct serv_parm *) ((uint8_t *) lp + sizeof (uint32_t));
 280         if (wwn_to_u64(sp->portName.u.wwn) == 0) {
 281                 lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
 282                                  "0140 PLOGI Reject: invalid nname\n");
 283                 stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
 284                 stat.un.b.lsRjtRsnCodeExp = LSEXP_INVALID_PNAME;
 285                 lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp,
 286                         NULL);
 287                 return 0;
 288         }
 289         if (wwn_to_u64(sp->nodeName.u.wwn) == 0) {
 290                 lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
 291                                  "0141 PLOGI Reject: invalid pname\n");
 292                 stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
 293                 stat.un.b.lsRjtRsnCodeExp = LSEXP_INVALID_NNAME;
 294                 lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp,
 295                         NULL);
 296                 return 0;
 297         }
 298         if ((lpfc_check_sparm(vport, ndlp, sp, CLASS3) == 0)) {
 299                 /* Reject this request because invalid parameters */
 300                 stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
 301                 stat.un.b.lsRjtRsnCodeExp = LSEXP_SPARM_OPTIONS;
 302                 lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp,
 303                         NULL);
 304                 return 0;
 305         }
 306         icmd = &cmdiocb->iocb;
 307
 308         /* PLOGI chkparm OK */
 309         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
 310                          "0114 PLOGI chkparm OK Data: x%x x%x x%x x%x\n",
 311                          ndlp->nlp_DID, ndlp->nlp_state, ndlp->nlp_flag,
 312                          ndlp->nlp_rpi);
 313
 314         if (vport->cfg_fcp_class == 2 && sp->cls2.classValid)
 315                 ndlp->nlp_fcp_info |= CLASS2;
 316         else
 317                 ndlp->nlp_fcp_info |= CLASS3;
 318
 319         ndlp->nlp_class_sup = 0;
 320         if (sp->cls1.classValid)
 321                 ndlp->nlp_class_sup |= FC_COS_CLASS1;
 322         if (sp->cls2.classValid)
 323                 ndlp->nlp_class_sup |= FC_COS_CLASS2;
 324         if (sp->cls3.classValid)
 325                 ndlp->nlp_class_sup |= FC_COS_CLASS3;
 326         if (sp->cls4.classValid)
 327                 ndlp->nlp_class_sup |= FC_COS_CLASS4;
 328         ndlp->nlp_maxframe =
 329                 ((sp->cmn.bbRcvSizeMsb & 0x0F) << 8) | sp->cmn.bbRcvSizeLsb;
 330
 331         /* no need to reg_login if we are already in one of these states */
 332         switch (ndlp->nlp_state) {
 333         case  NLP_STE_NPR_NODE:
 334                 if (!(ndlp->nlp_flag & NLP_NPR_ADISC))
 335                         break;
 336         case  NLP_STE_REG_LOGIN_ISSUE:
 337         case  NLP_STE_PRLI_ISSUE:
 338         case  NLP_STE_UNMAPPED_NODE:
 339         case  NLP_STE_MAPPED_NODE:
 340                 lpfc_els_rsp_acc(vport, ELS_CMD_PLOGI, cmdiocb, ndlp, NULL);
 341                 return 1;
 342         }
 343
 344         if ((vport->fc_flag & FC_PT2PT) &&
 345             !(vport->fc_flag & FC_PT2PT_PLOGI)) {
 346                 /* rcv'ed PLOGI decides what our NPortId will be */
 347                 vport->fc_myDID = icmd->un.rcvels.parmRo;
 348                 mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
 349                 if (mbox == NULL)
 350                         goto out;
 351                 lpfc_config_link(phba, mbox);
 352                 mbox->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
 353                 mbox->vport = vport;
 354                 rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
 355                 if (rc == MBX_NOT_FINISHED) {
 356                         mempool_free(mbox, phba->mbox_mem_pool);
 357                         goto out;
 358                 }
 359
 360                 lpfc_can_disctmo(vport);
 361         }
 362         mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
 363         if (!mbox)
 364                 goto out;
 365
 366         rc = lpfc_reg_rpi(phba, vport->vpi, icmd->un.rcvels.remoteID,
 367                             (uint8_t *) sp, mbox, 0);
 368         if (rc) {
 369                 mempool_free(mbox, phba->mbox_mem_pool);
 370                 goto out;
 371         }
 372
 373         /* ACC PLOGI rsp command needs to execute first,
 374          * queue this mbox command to be processed later.
 375          */
 376         mbox->mbox_cmpl = lpfc_mbx_cmpl_reg_login;
 377         /*
 378          * mbox->context2 = lpfc_nlp_get(ndlp) deferred until mailbox
 379          * command issued in lpfc_cmpl_els_acc().
 380          */
 381         mbox->vport = vport;
 382         spin_lock_irq(shost->host_lock);
 383         ndlp->nlp_flag |= (NLP_ACC_REGLOGIN | NLP_RCV_PLOGI);
 384         spin_unlock_irq(shost->host_lock);
 385
 386         /*
 387          * If there is an outstanding PLOGI issued, abort it before
 388          * sending ACC rsp for received PLOGI. If pending plogi
 389          * is not canceled here, the plogi will be rejected by
 390          * remote port and will be retried. On a configuration with
 391          * single discovery thread, this will cause a huge delay in
 392          * discovery. Also this will cause multiple state machines
 393          * running in parallel for this node.
 394          */
 395         if (ndlp->nlp_state == NLP_STE_PLOGI_ISSUE) {
 396                 /* software abort outstanding PLOGI */
 397                 lpfc_els_abort(phba, ndlp);
 398         }
 399
 400         if ((vport->port_type == LPFC_NPIV_PORT &&
 401              vport->cfg_restrict_login)) {
 402
 403                 /* In order to preserve RPIs, we want to cleanup
 404                  * the default RPI the firmware created to rcv
 405                  * this ELS request. The only way to do this is
 406                  * to register, then unregister the RPI.
 407                  */
 408                 spin_lock_irq(shost->host_lock);
 409                 ndlp->nlp_flag |= NLP_RM_DFLT_RPI;
 410                 spin_unlock_irq(shost->host_lock);
 411                 stat.un.b.lsRjtRsnCode = LSRJT_INVALID_CMD;
 412                 stat.un.b.lsRjtRsnCodeExp = LSEXP_NOTHING_MORE;
 413                 lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb,
 414                         ndlp, mbox);
 415                 return 1;
 416         }
 417         lpfc_els_rsp_acc(vport, ELS_CMD_PLOGI, cmdiocb, ndlp, mbox);
 418         return 1;
 419 out:
 420         stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
 421         stat.un.b.lsRjtRsnCodeExp = LSEXP_OUT_OF_RESOURCE;
 422         lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
 423         return 0;
 424 }
 425
 426 static int
 427 lpfc_rcv_padisc(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 428                 struct lpfc_iocbq *cmdiocb)
 429 {
 430         struct Scsi_Host   *shost = lpfc_shost_from_vport(vport);
 431         struct lpfc_dmabuf *pcmd;
 432         struct serv_parm   *sp;
 433         struct lpfc_name   *pnn, *ppn;
 434         struct ls_rjt stat;
 435         ADISC *ap;
 436         IOCB_t *icmd;
 437         uint32_t *lp;
 438         uint32_t cmd;
 439
 440         pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
 441         lp = (uint32_t *) pcmd->virt;
 442
 443         cmd = *lp++;
 444         if (cmd == ELS_CMD_ADISC) {
 445                 ap = (ADISC *) lp;
 446                 pnn = (struct lpfc_name *) & ap->nodeName;
 447                 ppn = (struct lpfc_name *) & ap->portName;
 448         } else {
 449                 sp = (struct serv_parm *) lp;
 450                 pnn = (struct lpfc_name *) & sp->nodeName;
 451                 ppn = (struct lpfc_name *) & sp->portName;
 452         }
 453
 454         icmd = &cmdiocb->iocb;
 455         if (icmd->ulpStatus == 0 && lpfc_check_adisc(vport, ndlp, pnn, ppn)) {
 456                 if (cmd == ELS_CMD_ADISC) {
 457                         lpfc_els_rsp_adisc_acc(vport, cmdiocb, ndlp);
 458                 } else {
 459                         lpfc_els_rsp_acc(vport, ELS_CMD_PLOGI, cmdiocb, ndlp,
 460                                          NULL);
 461                 }
 462                 return 1;
 463         }
 464         /* Reject this request because invalid parameters */
 465         stat.un.b.lsRjtRsvd0 = 0;
 466         stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
 467         stat.un.b.lsRjtRsnCodeExp = LSEXP_SPARM_OPTIONS;
 468         stat.un.b.vendorUnique = 0;
 469         lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
 470
 471         /* 1 sec timeout */
 472         mod_timer(&ndlp->nlp_delayfunc, jiffies + HZ);
 473
 474         spin_lock_irq(shost->host_lock);
 475         ndlp->nlp_flag |= NLP_DELAY_TMO;
 476         spin_unlock_irq(shost->host_lock);
 477         ndlp->nlp_last_elscmd = ELS_CMD_PLOGI;
 478         ndlp->nlp_prev_state = ndlp->nlp_state;
 479         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
 480         return 0;
 481 }
 482
 483 static int
 484 lpfc_rcv_logo(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 485               struct lpfc_iocbq *cmdiocb, uint32_t els_cmd)
 486 {
 487         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
 488
 489         /* Put ndlp in NPR state with 1 sec timeout for plogi, ACC logo */
 490         /* Only call LOGO ACC for first LOGO, this avoids sending unnecessary
 491          * PLOGIs during LOGO storms from a device.
 492          */
 493         spin_lock_irq(shost->host_lock);
 494         ndlp->nlp_flag |= NLP_LOGO_ACC;
 495         spin_unlock_irq(shost->host_lock);
 496         if (els_cmd == ELS_CMD_PRLO)
 497                 lpfc_els_rsp_acc(vport, ELS_CMD_PRLO, cmdiocb, ndlp, NULL);
 498         else
 499                 lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
 500         if ((ndlp->nlp_DID == Fabric_DID) &&
 501                 vport->port_type == LPFC_NPIV_PORT) {
 502                 lpfc_linkdown_port(vport);
 503                 mod_timer(&ndlp->nlp_delayfunc, jiffies + HZ * 1);
 504                 spin_lock_irq(shost->host_lock);
 505                 ndlp->nlp_flag |= NLP_DELAY_TMO;
 506                 spin_unlock_irq(shost->host_lock);
 507
 508                 ndlp->nlp_last_elscmd = ELS_CMD_FDISC;
 509         } else if ((!(ndlp->nlp_type & NLP_FABRIC) &&
 510                 ((ndlp->nlp_type & NLP_FCP_TARGET) ||
 511                 !(ndlp->nlp_type & NLP_FCP_INITIATOR))) ||
 512                 (ndlp->nlp_state == NLP_STE_ADISC_ISSUE)) {
 513                 /* Only try to re-login if this is NOT a Fabric Node */
 514                 mod_timer(&ndlp->nlp_delayfunc, jiffies + HZ * 1);
 515                 spin_lock_irq(shost->host_lock);
 516                 ndlp->nlp_flag |= NLP_DELAY_TMO;
 517                 spin_unlock_irq(shost->host_lock);
 518
 519                 ndlp->nlp_last_elscmd = ELS_CMD_PLOGI;
 520         }
 521         ndlp->nlp_prev_state = ndlp->nlp_state;
 522         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
 523
 524         spin_lock_irq(shost->host_lock);
 525         ndlp->nlp_flag &= ~NLP_NPR_ADISC;
 526         spin_unlock_irq(shost->host_lock);
 527         /* The driver has to wait until the ACC completes before it continues
 528          * processing the LOGO.  The action will resume in
 529          * lpfc_cmpl_els_logo_acc routine. Since part of processing includes an
 530          * unreg_login, the driver waits so the ACC does not get aborted.
 531          */
 532         return 0;
 533 }
 534
 535 static void
 536 lpfc_rcv_prli(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 537               struct lpfc_iocbq *cmdiocb)
 538 {
 539         struct lpfc_dmabuf *pcmd;
 540         uint32_t *lp;
 541         PRLI *npr;
 542         struct fc_rport *rport = ndlp->rport;
 543         u32 roles;
 544
 545         pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
 546         lp = (uint32_t *) pcmd->virt;
 547         npr = (PRLI *) ((uint8_t *) lp + sizeof (uint32_t));
 548
 549         ndlp->nlp_type &= ~(NLP_FCP_TARGET | NLP_FCP_INITIATOR);
 550         ndlp->nlp_fcp_info &= ~NLP_FCP_2_DEVICE;
 551         if (npr->prliType == PRLI_FCP_TYPE) {
 552                 if (npr->initiatorFunc)
 553                         ndlp->nlp_type |= NLP_FCP_INITIATOR;
 554                 if (npr->targetFunc)
 555                         ndlp->nlp_type |= NLP_FCP_TARGET;
 556                 if (npr->Retry)
 557                         ndlp->nlp_fcp_info |= NLP_FCP_2_DEVICE;
 558         }
 559         if (rport) {
 560                 /* We need to update the rport role values */
 561                 roles = FC_RPORT_ROLE_UNKNOWN;
 562                 if (ndlp->nlp_type & NLP_FCP_INITIATOR)
 563                         roles |= FC_RPORT_ROLE_FCP_INITIATOR;
 564                 if (ndlp->nlp_type & NLP_FCP_TARGET)
 565                         roles |= FC_RPORT_ROLE_FCP_TARGET;
 566
 567                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_RPORT,
 568                         "rport rolechg:   role:x%x did:x%x flg:x%x",
 569                         roles, ndlp->nlp_DID, ndlp->nlp_flag);
 570
 571                 fc_remote_port_rolechg(rport, roles);
 572         }
 573 }
 574
 575 static uint32_t
 576 lpfc_disc_set_adisc(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
 577 {
 578         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
 579
 580         if (!(ndlp->nlp_flag & NLP_RPI_VALID)) {
 581                 ndlp->nlp_flag &= ~NLP_NPR_ADISC;
 582                 return 0;
 583         }
 584
 585         if (!(vport->fc_flag & FC_PT2PT)) {
 586                 /* Check config parameter use-adisc or FCP-2 */
 587                 if ((vport->cfg_use_adisc && (vport->fc_flag & FC_RSCN_MODE)) ||
 588                     ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) {
 589                         spin_lock_irq(shost->host_lock);
 590                         ndlp->nlp_flag |= NLP_NPR_ADISC;
 591                         spin_unlock_irq(shost->host_lock);
 592                         return 1;
 593                 }
 594         }
 595         ndlp->nlp_flag &= ~NLP_NPR_ADISC;
 596         lpfc_unreg_rpi(vport, ndlp);
 597         return 0;
 598 }
 599
 600 static uint32_t
 601 lpfc_disc_illegal(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 602                   void *arg, uint32_t evt)
 603 {
 604         lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
 605                          "0271 Illegal State Transition: node x%x "
 606                          "event x%x, state x%x Data: x%x x%x\n",
 607                          ndlp->nlp_DID, evt, ndlp->nlp_state, ndlp->nlp_rpi,
 608                          ndlp->nlp_flag);
 609         return ndlp->nlp_state;
 610 }
 611
 612 static uint32_t
 613 lpfc_cmpl_plogi_illegal(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 614                   void *arg, uint32_t evt)
 615 {
 616         /* This transition is only legal if we previously
 617          * rcv'ed a PLOGI. Since we don't want 2 discovery threads
 618          * working on the same NPortID, do nothing for this thread
 619          * to stop it.
 620          */
 621         if (!(ndlp->nlp_flag & NLP_RCV_PLOGI)) {
 622                 lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
 623                          "0272 Illegal State Transition: node x%x "
 624                          "event x%x, state x%x Data: x%x x%x\n",
 625                          ndlp->nlp_DID, evt, ndlp->nlp_state, ndlp->nlp_rpi,
 626                          ndlp->nlp_flag);
 627         }
 628         return ndlp->nlp_state;
 629 }
 630
 631 /* Start of Discovery State Machine routines */
 632
 633 static uint32_t
 634 lpfc_rcv_plogi_unused_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 635                            void *arg, uint32_t evt)
 636 {
 637         struct lpfc_iocbq *cmdiocb;
 638
 639         cmdiocb = (struct lpfc_iocbq *) arg;
 640
 641         if (lpfc_rcv_plogi(vport, ndlp, cmdiocb)) {
 642                 return ndlp->nlp_state;
 643         }
 644         return NLP_STE_FREED_NODE;
 645 }
 646
 647 static uint32_t
 648 lpfc_rcv_els_unused_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 649                          void *arg, uint32_t evt)
 650 {
 651         lpfc_issue_els_logo(vport, ndlp, 0);
 652         return ndlp->nlp_state;
 653 }
 654
 655 static uint32_t
 656 lpfc_rcv_logo_unused_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 657                           void *arg, uint32_t evt)
 658 {
 659         struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
 660         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
 661
 662         spin_lock_irq(shost->host_lock);
 663         ndlp->nlp_flag |= NLP_LOGO_ACC;
 664         spin_unlock_irq(shost->host_lock);
 665         lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
 666
 667         return ndlp->nlp_state;
 668 }
 669
 670 static uint32_t
 671 lpfc_cmpl_logo_unused_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 672                            void *arg, uint32_t evt)
 673 {
 674         return NLP_STE_FREED_NODE;
 675 }
 676
 677 static uint32_t
 678 lpfc_device_rm_unused_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 679                            void *arg, uint32_t evt)
 680 {
 681         return NLP_STE_FREED_NODE;
 682 }
 683
 684 static uint32_t
 685 lpfc_rcv_plogi_plogi_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 686                            void *arg, uint32_t evt)
 687 {
 688         struct Scsi_Host   *shost = lpfc_shost_from_vport(vport);
 689         struct lpfc_hba   *phba = vport->phba;
 690         struct lpfc_iocbq *cmdiocb = arg;
 691         struct lpfc_dmabuf *pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
 692         uint32_t *lp = (uint32_t *) pcmd->virt;
 693         struct serv_parm *sp = (struct serv_parm *) (lp + 1);
 694         struct ls_rjt stat;
 695         int port_cmp;
 696
 697         memset(&stat, 0, sizeof (struct ls_rjt));
 698
 699         /* For a PLOGI, we only accept if our portname is less
 700          * than the remote portname.
 701          */
 702         phba->fc_stat.elsLogiCol++;
 703         port_cmp = memcmp(&vport->fc_portname, &sp->portName,
 704                           sizeof(struct lpfc_name));
 705
 706         if (port_cmp >= 0) {
 707                 /* Reject this request because the remote node will accept
 708                    ours */
 709                 stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
 710                 stat.un.b.lsRjtRsnCodeExp = LSEXP_CMD_IN_PROGRESS;
 711                 lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp,
 712                         NULL);
 713         } else {
 714                 if (lpfc_rcv_plogi(vport, ndlp, cmdiocb) &&
 715                     (ndlp->nlp_flag & NLP_NPR_2B_DISC) &&
 716                     (vport->num_disc_nodes)) {
 717                         spin_lock_irq(shost->host_lock);
 718                         ndlp->nlp_flag &= ~NLP_NPR_2B_DISC;
 719                         spin_unlock_irq(shost->host_lock);
 720                         /* Check if there are more PLOGIs to be sent */
 721                         lpfc_more_plogi(vport);
 722                         if (vport->num_disc_nodes == 0) {
 723                                 spin_lock_irq(shost->host_lock);
 724                                 vport->fc_flag &= ~FC_NDISC_ACTIVE;
 725                                 spin_unlock_irq(shost->host_lock);
 726                                 lpfc_can_disctmo(vport);
 727                                 lpfc_end_rscn(vport);
 728                         }
 729                 }
 730         } /* If our portname was less */
 731
 732         return ndlp->nlp_state;
 733 }
 734
 735 static uint32_t
 736 lpfc_rcv_prli_plogi_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 737                           void *arg, uint32_t evt)
 738 {
 739         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
 740         struct ls_rjt     stat;
 741
 742         memset(&stat, 0, sizeof (struct ls_rjt));
 743         stat.un.b.lsRjtRsnCode = LSRJT_LOGICAL_BSY;
 744         stat.un.b.lsRjtRsnCodeExp = LSEXP_NOTHING_MORE;
 745         lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
 746         return ndlp->nlp_state;
 747 }
 748
 749 static uint32_t
 750 lpfc_rcv_logo_plogi_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 751                           void *arg, uint32_t evt)
 752 {
 753         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
 754
 755                                 /* software abort outstanding PLOGI */
 756         lpfc_els_abort(vport->phba, ndlp);
 757
 758         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_LOGO);
 759         return ndlp->nlp_state;
 760 }
 761
 762 static uint32_t
 763 lpfc_rcv_els_plogi_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 764                          void *arg, uint32_t evt)
 765 {
 766         struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
 767         struct lpfc_hba   *phba = vport->phba;
 768         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
 769
 770         /* software abort outstanding PLOGI */
 771         lpfc_els_abort(phba, ndlp);
 772
 773         if (evt == NLP_EVT_RCV_LOGO) {
 774                 lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
 775         } else {
 776                 lpfc_issue_els_logo(vport, ndlp, 0);
 777         }
 778
 779         /* Put ndlp in npr state set plogi timer for 1 sec */
 780         mod_timer(&ndlp->nlp_delayfunc, jiffies + HZ * 1);
 781         spin_lock_irq(shost->host_lock);
 782         ndlp->nlp_flag |= NLP_DELAY_TMO;
 783         spin_unlock_irq(shost->host_lock);
 784         ndlp->nlp_last_elscmd = ELS_CMD_PLOGI;
 785         ndlp->nlp_prev_state = NLP_STE_PLOGI_ISSUE;
 786         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
 787
 788         return ndlp->nlp_state;
 789 }
 790
 791 static uint32_t
 792 lpfc_cmpl_plogi_plogi_issue(struct lpfc_vport *vport,
 793                             struct lpfc_nodelist *ndlp,
 794                             void *arg,
 795                             uint32_t evt)
 796 {
 797         struct lpfc_hba    *phba = vport->phba;
 798         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
 799         struct lpfc_iocbq  *cmdiocb, *rspiocb;
 800         struct lpfc_dmabuf *pcmd, *prsp, *mp;
 801         uint32_t *lp;
 802         IOCB_t *irsp;
 803         struct serv_parm *sp;
 804         LPFC_MBOXQ_t *mbox;
 805
 806         cmdiocb = (struct lpfc_iocbq *) arg;
 807         rspiocb = cmdiocb->context_un.rsp_iocb;
 808
 809         if (ndlp->nlp_flag & NLP_ACC_REGLOGIN) {
 810                 /* Recovery from PLOGI collision logic */
 811                 return ndlp->nlp_state;
 812         }
 813
 814         irsp = &rspiocb->iocb;
 815
 816         if (irsp->ulpStatus)
 817                 goto out;
 818
 819         pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
 820
 821         prsp = list_get_first(&pcmd->list, struct lpfc_dmabuf, list);
 822
 823         lp = (uint32_t *) prsp->virt;
 824         sp = (struct serv_parm *) ((uint8_t *) lp + sizeof (uint32_t));
 825
 826         /* Some switches have FDMI servers returning 0 for WWN */
 827         if ((ndlp->nlp_DID != FDMI_DID) &&
 828                 (wwn_to_u64(sp->portName.u.wwn) == 0 ||
 829                 wwn_to_u64(sp->nodeName.u.wwn) == 0)) {
 830                 lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
 831                                  "0142 PLOGI RSP: Invalid WWN.\n");
 832                 goto out;
 833         }
 834         if (!lpfc_check_sparm(vport, ndlp, sp, CLASS3))
 835                 goto out;
 836         /* PLOGI chkparm OK */
 837         lpfc_printf_vlog(vport, KERN_INFO, LOG_ELS,
 838                          "0121 PLOGI chkparm OK Data: x%x x%x x%x x%x\n",
 839                          ndlp->nlp_DID, ndlp->nlp_state,
 840                          ndlp->nlp_flag, ndlp->nlp_rpi);
 841         if (vport->cfg_fcp_class == 2 && (sp->cls2.classValid))
 842                 ndlp->nlp_fcp_info |= CLASS2;
 843         else
 844                 ndlp->nlp_fcp_info |= CLASS3;
 845
 846         ndlp->nlp_class_sup = 0;
 847         if (sp->cls1.classValid)
 848                 ndlp->nlp_class_sup |= FC_COS_CLASS1;
 849         if (sp->cls2.classValid)
 850                 ndlp->nlp_class_sup |= FC_COS_CLASS2;
 851         if (sp->cls3.classValid)
 852                 ndlp->nlp_class_sup |= FC_COS_CLASS3;
 853         if (sp->cls4.classValid)
 854                 ndlp->nlp_class_sup |= FC_COS_CLASS4;
 855         ndlp->nlp_maxframe =
 856                 ((sp->cmn.bbRcvSizeMsb & 0x0F) << 8) | sp->cmn.bbRcvSizeLsb;
 857
 858         mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
 859         if (!mbox) {
 860                 lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
 861                         "0133 PLOGI: no memory for reg_login "
 862                         "Data: x%x x%x x%x x%x\n",
 863                         ndlp->nlp_DID, ndlp->nlp_state,
 864                         ndlp->nlp_flag, ndlp->nlp_rpi);
 865                 goto out;
 866         }
 867
 868         lpfc_unreg_rpi(vport, ndlp);
 869
 870         if (lpfc_reg_rpi(phba, vport->vpi, irsp->un.elsreq64.remoteID,
 871                            (uint8_t *) sp, mbox, 0) == 0) {
 872                 switch (ndlp->nlp_DID) {
 873                 case NameServer_DID:
 874                         mbox->mbox_cmpl = lpfc_mbx_cmpl_ns_reg_login;
 875                         break;
 876                 case FDMI_DID:
 877                         mbox->mbox_cmpl = lpfc_mbx_cmpl_fdmi_reg_login;
 878                         break;
 879                 default:
 880                         mbox->mbox_cmpl = lpfc_mbx_cmpl_reg_login;
 881                 }
 882                 mbox->context2 = lpfc_nlp_get(ndlp);
 883                 mbox->vport = vport;
 884                 if (lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT)
 885                     != MBX_NOT_FINISHED) {
 886                         lpfc_nlp_set_state(vport, ndlp,
 887                                            NLP_STE_REG_LOGIN_ISSUE);
 888                         return ndlp->nlp_state;
 889                 }
 890                 /* decrement node reference count to the failed mbox
 891                  * command
 892                  */
 893                 lpfc_nlp_put(ndlp);
 894                 mp = (struct lpfc_dmabuf *) mbox->context1;
 895                 lpfc_mbuf_free(phba, mp->virt, mp->phys);
 896                 kfree(mp);
 897                 mempool_free(mbox, phba->mbox_mem_pool);
 898
 899                 lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
 900                                  "0134 PLOGI: cannot issue reg_login "
 901                                  "Data: x%x x%x x%x x%x\n",
 902                                  ndlp->nlp_DID, ndlp->nlp_state,
 903                                  ndlp->nlp_flag, ndlp->nlp_rpi);
 904         } else {
 905                 mempool_free(mbox, phba->mbox_mem_pool);
 906
 907                 lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
 908                                  "0135 PLOGI: cannot format reg_login "
 909                                  "Data: x%x x%x x%x x%x\n",
 910                                  ndlp->nlp_DID, ndlp->nlp_state,
 911                                  ndlp->nlp_flag, ndlp->nlp_rpi);
 912         }
 913
 914
 915 out:
 916         if (ndlp->nlp_DID == NameServer_DID) {
 917                 lpfc_vport_set_state(vport, FC_VPORT_FAILED);
 918                 lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
 919                                  "0261 Cannot Register NameServer login\n");
 920         }
 921
 922         spin_lock_irq(shost->host_lock);
 923         ndlp->nlp_flag |= NLP_DEFER_RM;
 924         spin_unlock_irq(shost->host_lock);
 925         return NLP_STE_FREED_NODE;
 926 }
 927
 928 static uint32_t
 929 lpfc_cmpl_logo_plogi_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 930                            void *arg, uint32_t evt)
 931 {
 932         return ndlp->nlp_state;
 933 }
 934
 935 static uint32_t
 936 lpfc_cmpl_reglogin_plogi_issue(struct lpfc_vport *vport,
 937         struct lpfc_nodelist *ndlp, void *arg, uint32_t evt)
 938 {
 939         return ndlp->nlp_state;
 940 }
 941
 942 static uint32_t
 943 lpfc_device_rm_plogi_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 944                            void *arg, uint32_t evt)
 945 {
 946         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
 947
 948         if (ndlp->nlp_flag & NLP_NPR_2B_DISC) {
 949                 spin_lock_irq(shost->host_lock);
 950                 ndlp->nlp_flag |= NLP_NODEV_REMOVE;
 951                 spin_unlock_irq(shost->host_lock);
 952                 return ndlp->nlp_state;
 953         } else {
 954                 /* software abort outstanding PLOGI */
 955                 lpfc_els_abort(vport->phba, ndlp);
 956
 957                 lpfc_drop_node(vport, ndlp);
 958                 return NLP_STE_FREED_NODE;
 959         }
 960 }
 961
 962 static uint32_t
 963 lpfc_device_recov_plogi_issue(struct lpfc_vport *vport,
 964                               struct lpfc_nodelist *ndlp,
 965                               void *arg,
 966                               uint32_t evt)
 967 {
 968         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
 969         struct lpfc_hba  *phba = vport->phba;
 970
 971         /* Don't do anything that will mess up processing of the
 972          * previous RSCN.
 973          */
 974         if (vport->fc_flag & FC_RSCN_DEFERRED)
 975                 return ndlp->nlp_state;
 976
 977         /* software abort outstanding PLOGI */
 978         lpfc_els_abort(phba, ndlp);
 979
 980         ndlp->nlp_prev_state = NLP_STE_PLOGI_ISSUE;
 981         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
 982         spin_lock_irq(shost->host_lock);
 983         ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
 984         spin_unlock_irq(shost->host_lock);
 985
 986         return ndlp->nlp_state;
 987 }
 988
 989 static uint32_t
 990 lpfc_rcv_plogi_adisc_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 991                            void *arg, uint32_t evt)
 992 {
 993         struct Scsi_Host   *shost = lpfc_shost_from_vport(vport);
 994         struct lpfc_hba   *phba = vport->phba;
 995         struct lpfc_iocbq *cmdiocb;
 996
 997         /* software abort outstanding ADISC */
 998         lpfc_els_abort(phba, ndlp);
 999
1000         cmdiocb = (struct lpfc_iocbq *) arg;
1001
1002         if (lpfc_rcv_plogi(vport, ndlp, cmdiocb)) {
1003                 if (ndlp->nlp_flag & NLP_NPR_2B_DISC) {
1004                         spin_lock_irq(shost->host_lock);
1005                         ndlp->nlp_flag &= ~NLP_NPR_2B_DISC;
1006                         spin_unlock_irq(shost->host_lock);
1007                         if (vport->num_disc_nodes)
1008                                 lpfc_more_adisc(vport);
1009                 }
1010                 return ndlp->nlp_state;
1011         }
1012         ndlp->nlp_prev_state = NLP_STE_ADISC_ISSUE;
1013         lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0);
1014         lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
1015
1016         return ndlp->nlp_state;
1017 }
1018
1019 static uint32_t
1020 lpfc_rcv_prli_adisc_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1021                           void *arg, uint32_t evt)
1022 {
1023         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1024
1025         lpfc_els_rsp_prli_acc(vport, cmdiocb, ndlp);
1026         return ndlp->nlp_state;
1027 }
1028
1029 static uint32_t
1030 lpfc_rcv_logo_adisc_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1031                           void *arg, uint32_t evt)
1032 {
1033         struct lpfc_hba *phba = vport->phba;
1034         struct lpfc_iocbq *cmdiocb;
1035
1036         cmdiocb = (struct lpfc_iocbq *) arg;
1037
1038         /* software abort outstanding ADISC */
1039         lpfc_els_abort(phba, ndlp);
1040
1041         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_LOGO);
1042         return ndlp->nlp_state;
1043 }
1044
1045 static uint32_t
1046 lpfc_rcv_padisc_adisc_issue(struct lpfc_vport *vport,
1047                             struct lpfc_nodelist *ndlp,
1048                             void *arg, uint32_t evt)
1049 {
1050         struct lpfc_iocbq *cmdiocb;
1051
1052         cmdiocb = (struct lpfc_iocbq *) arg;
1053
1054         lpfc_rcv_padisc(vport, ndlp, cmdiocb);
1055         return ndlp->nlp_state;
1056 }
1057
1058 static uint32_t
1059 lpfc_rcv_prlo_adisc_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1060                           void *arg, uint32_t evt)
1061 {
1062         struct lpfc_iocbq *cmdiocb;
1063
1064         cmdiocb = (struct lpfc_iocbq *) arg;
1065
1066         /* Treat like rcv logo */
1067         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_PRLO);
1068         return ndlp->nlp_state;
1069 }
1070
1071 static uint32_t
1072 lpfc_cmpl_adisc_adisc_issue(struct lpfc_vport *vport,
1073                             struct lpfc_nodelist *ndlp,
1074                             void *arg, uint32_t evt)
1075 {
1076         struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
1077         struct lpfc_hba   *phba = vport->phba;
1078         struct lpfc_iocbq *cmdiocb, *rspiocb;
1079         IOCB_t *irsp;
1080         ADISC *ap;
1081         int rc;
1082
1083         cmdiocb = (struct lpfc_iocbq *) arg;
1084         rspiocb = cmdiocb->context_un.rsp_iocb;
1085
1086         ap = (ADISC *)lpfc_check_elscmpl_iocb(phba, cmdiocb, rspiocb);
1087         irsp = &rspiocb->iocb;
1088
1089         if ((irsp->ulpStatus) ||
1090             (!lpfc_check_adisc(vport, ndlp, &ap->nodeName, &ap->portName))) {
1091                 /* 1 sec timeout */
1092                 mod_timer(&ndlp->nlp_delayfunc, jiffies + HZ);
1093                 spin_lock_irq(shost->host_lock);
1094                 ndlp->nlp_flag |= NLP_DELAY_TMO;
1095                 spin_unlock_irq(shost->host_lock);
1096                 ndlp->nlp_last_elscmd = ELS_CMD_PLOGI;
1097
1098                 memset(&ndlp->nlp_nodename, 0, sizeof(struct lpfc_name));
1099                 memset(&ndlp->nlp_portname, 0, sizeof(struct lpfc_name));
1100
1101                 ndlp->nlp_prev_state = NLP_STE_ADISC_ISSUE;
1102                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1103                 lpfc_unreg_rpi(vport, ndlp);
1104                 return ndlp->nlp_state;
1105         }
1106
1107         if (phba->sli_rev == LPFC_SLI_REV4) {
1108                 rc = lpfc_sli4_resume_rpi(ndlp);
1109                 if (rc) {
1110                         /* Stay in state and retry. */
1111                         ndlp->nlp_prev_state = NLP_STE_ADISC_ISSUE;
1112                         return ndlp->nlp_state;
1113                 }
1114         }
1115
1116         if (ndlp->nlp_type & NLP_FCP_TARGET) {
1117                 ndlp->nlp_prev_state = NLP_STE_ADISC_ISSUE;
1118                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_MAPPED_NODE);
1119         } else {
1120                 ndlp->nlp_prev_state = NLP_STE_ADISC_ISSUE;
1121                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
1122         }
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->u.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->u.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->u.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         ndlp->nlp_flag |= NLP_RPI_VALID;
1308
1309         /* Only if we are not a fabric nport do we issue PRLI */
1310         if (!(ndlp->nlp_type & NLP_FABRIC)) {
1311                 ndlp->nlp_prev_state = NLP_STE_REG_LOGIN_ISSUE;
1312                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_PRLI_ISSUE);
1313                 lpfc_issue_els_prli(vport, ndlp, 0);
1314         } else {
1315                 ndlp->nlp_prev_state = NLP_STE_REG_LOGIN_ISSUE;
1316                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
1317         }
1318         return ndlp->nlp_state;
1319 }
1320
1321 static uint32_t
1322 lpfc_device_rm_reglogin_issue(struct lpfc_vport *vport,
1323                               struct lpfc_nodelist *ndlp,
1324                               void *arg,
1325                               uint32_t evt)
1326 {
1327         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1328
1329         if (ndlp->nlp_flag & NLP_NPR_2B_DISC) {
1330                 spin_lock_irq(shost->host_lock);
1331                 ndlp->nlp_flag |= NLP_NODEV_REMOVE;
1332                 spin_unlock_irq(shost->host_lock);
1333                 return ndlp->nlp_state;
1334         } else {
1335                 lpfc_drop_node(vport, ndlp);
1336                 return NLP_STE_FREED_NODE;
1337         }
1338 }
1339
1340 static uint32_t
1341 lpfc_device_recov_reglogin_issue(struct lpfc_vport *vport,
1342                                  struct lpfc_nodelist *ndlp,
1343                                  void *arg,
1344                                  uint32_t evt)
1345 {
1346         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1347
1348         /* Don't do anything that will mess up processing of the
1349          * previous RSCN.
1350          */
1351         if (vport->fc_flag & FC_RSCN_DEFERRED)
1352                 return ndlp->nlp_state;
1353
1354         ndlp->nlp_prev_state = NLP_STE_REG_LOGIN_ISSUE;
1355         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1356         spin_lock_irq(shost->host_lock);
1357         ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
1358         spin_unlock_irq(shost->host_lock);
1359         lpfc_disc_set_adisc(vport, ndlp);
1360         return ndlp->nlp_state;
1361 }
1362
1363 static uint32_t
1364 lpfc_rcv_plogi_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1365                           void *arg, uint32_t evt)
1366 {
1367         struct lpfc_iocbq *cmdiocb;
1368
1369         cmdiocb = (struct lpfc_iocbq *) arg;
1370
1371         lpfc_rcv_plogi(vport, ndlp, cmdiocb);
1372         return ndlp->nlp_state;
1373 }
1374
1375 static uint32_t
1376 lpfc_rcv_prli_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1377                          void *arg, uint32_t evt)
1378 {
1379         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1380
1381         lpfc_els_rsp_prli_acc(vport, cmdiocb, ndlp);
1382         return ndlp->nlp_state;
1383 }
1384
1385 static uint32_t
1386 lpfc_rcv_logo_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1387                          void *arg, uint32_t evt)
1388 {
1389         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1390
1391         /* Software abort outstanding PRLI before sending acc */
1392         lpfc_els_abort(vport->phba, ndlp);
1393
1394         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_LOGO);
1395         return ndlp->nlp_state;
1396 }
1397
1398 static uint32_t
1399 lpfc_rcv_padisc_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1400                            void *arg, uint32_t evt)
1401 {
1402         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1403
1404         lpfc_rcv_padisc(vport, ndlp, cmdiocb);
1405         return ndlp->nlp_state;
1406 }
1407
1408 /* This routine is envoked when we rcv a PRLO request from a nport
1409  * we are logged into.  We should send back a PRLO rsp setting the
1410  * appropriate bits.
1411  * NEXT STATE = PRLI_ISSUE
1412  */
1413 static uint32_t
1414 lpfc_rcv_prlo_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1415                          void *arg, uint32_t evt)
1416 {
1417         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1418
1419         lpfc_els_rsp_acc(vport, ELS_CMD_PRLO, cmdiocb, ndlp, NULL);
1420         return ndlp->nlp_state;
1421 }
1422
1423 static uint32_t
1424 lpfc_cmpl_prli_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1425                           void *arg, uint32_t evt)
1426 {
1427         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1428         struct lpfc_iocbq *cmdiocb, *rspiocb;
1429         struct lpfc_hba   *phba = vport->phba;
1430         IOCB_t *irsp;
1431         PRLI *npr;
1432
1433         cmdiocb = (struct lpfc_iocbq *) arg;
1434         rspiocb = cmdiocb->context_un.rsp_iocb;
1435         npr = (PRLI *)lpfc_check_elscmpl_iocb(phba, cmdiocb, rspiocb);
1436
1437         irsp = &rspiocb->iocb;
1438         if (irsp->ulpStatus) {
1439                 if ((vport->port_type == LPFC_NPIV_PORT) &&
1440                     vport->cfg_restrict_login) {
1441                         goto out;
1442                 }
1443                 ndlp->nlp_prev_state = NLP_STE_PRLI_ISSUE;
1444                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
1445                 return ndlp->nlp_state;
1446         }
1447
1448         /* Check out PRLI rsp */
1449         ndlp->nlp_type &= ~(NLP_FCP_TARGET | NLP_FCP_INITIATOR);
1450         ndlp->nlp_fcp_info &= ~NLP_FCP_2_DEVICE;
1451         if ((npr->acceptRspCode == PRLI_REQ_EXECUTED) &&
1452             (npr->prliType == PRLI_FCP_TYPE)) {
1453                 if (npr->initiatorFunc)
1454                         ndlp->nlp_type |= NLP_FCP_INITIATOR;
1455                 if (npr->targetFunc)
1456                         ndlp->nlp_type |= NLP_FCP_TARGET;
1457                 if (npr->Retry)
1458                         ndlp->nlp_fcp_info |= NLP_FCP_2_DEVICE;
1459         }
1460         if (!(ndlp->nlp_type & NLP_FCP_TARGET) &&
1461             (vport->port_type == LPFC_NPIV_PORT) &&
1462              vport->cfg_restrict_login) {
1463 out:
1464                 spin_lock_irq(shost->host_lock);
1465                 ndlp->nlp_flag |= NLP_TARGET_REMOVE;
1466                 spin_unlock_irq(shost->host_lock);
1467                 lpfc_issue_els_logo(vport, ndlp, 0);
1468
1469                 ndlp->nlp_prev_state = NLP_STE_PRLI_ISSUE;
1470                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1471                 return ndlp->nlp_state;
1472         }
1473
1474         ndlp->nlp_prev_state = NLP_STE_PRLI_ISSUE;
1475         if (ndlp->nlp_type & NLP_FCP_TARGET)
1476                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_MAPPED_NODE);
1477         else
1478                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
1479         return ndlp->nlp_state;
1480 }
1481
1482 /*! lpfc_device_rm_prli_issue
1483  *
1484  * \pre
1485  * \post
1486  * \param   phba
1487  * \param   ndlp
1488  * \param   arg
1489  * \param   evt
1490  * \return  uint32_t
1491  *
1492  * \b Description:
1493  *    This routine is envoked when we a request to remove a nport we are in the
1494  *    process of PRLIing. We should software abort outstanding prli, unreg
1495  *    login, send a logout. We will change node state to UNUSED_NODE, put it
1496  *    on plogi list so it can be freed when LOGO completes.
1497  *
1498  */
1499
1500 static uint32_t
1501 lpfc_device_rm_prli_issue(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1502                           void *arg, uint32_t evt)
1503 {
1504         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1505
1506         if (ndlp->nlp_flag & NLP_NPR_2B_DISC) {
1507                 spin_lock_irq(shost->host_lock);
1508                 ndlp->nlp_flag |= NLP_NODEV_REMOVE;
1509                 spin_unlock_irq(shost->host_lock);
1510                 return ndlp->nlp_state;
1511         } else {
1512                 /* software abort outstanding PLOGI */
1513                 lpfc_els_abort(vport->phba, ndlp);
1514
1515                 lpfc_drop_node(vport, ndlp);
1516                 return NLP_STE_FREED_NODE;
1517         }
1518 }
1519
1520
1521 /*! lpfc_device_recov_prli_issue
1522  *
1523  * \pre
1524  * \post
1525  * \param   phba
1526  * \param   ndlp
1527  * \param   arg
1528  * \param   evt
1529  * \return  uint32_t
1530  *
1531  * \b Description:
1532  *    The routine is envoked when the state of a device is unknown, like
1533  *    during a link down. We should remove the nodelist entry from the
1534  *    unmapped list, issue a UNREG_LOGIN, do a software abort of the
1535  *    outstanding PRLI command, then free the node entry.
1536  */
1537 static uint32_t
1538 lpfc_device_recov_prli_issue(struct lpfc_vport *vport,
1539                              struct lpfc_nodelist *ndlp,
1540                              void *arg,
1541                              uint32_t evt)
1542 {
1543         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1544         struct lpfc_hba  *phba = vport->phba;
1545
1546         /* Don't do anything that will mess up processing of the
1547          * previous RSCN.
1548          */
1549         if (vport->fc_flag & FC_RSCN_DEFERRED)
1550                 return ndlp->nlp_state;
1551
1552         /* software abort outstanding PRLI */
1553         lpfc_els_abort(phba, ndlp);
1554
1555         ndlp->nlp_prev_state = NLP_STE_PRLI_ISSUE;
1556         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1557         spin_lock_irq(shost->host_lock);
1558         ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
1559         spin_unlock_irq(shost->host_lock);
1560         lpfc_disc_set_adisc(vport, ndlp);
1561         return ndlp->nlp_state;
1562 }
1563
1564 static uint32_t
1565 lpfc_rcv_plogi_unmap_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1566                           void *arg, uint32_t evt)
1567 {
1568         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1569
1570         lpfc_rcv_plogi(vport, ndlp, cmdiocb);
1571         return ndlp->nlp_state;
1572 }
1573
1574 static uint32_t
1575 lpfc_rcv_prli_unmap_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1576                          void *arg, uint32_t evt)
1577 {
1578         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1579
1580         lpfc_rcv_prli(vport, ndlp, cmdiocb);
1581         lpfc_els_rsp_prli_acc(vport, cmdiocb, ndlp);
1582         return ndlp->nlp_state;
1583 }
1584
1585 static uint32_t
1586 lpfc_rcv_logo_unmap_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1587                          void *arg, uint32_t evt)
1588 {
1589         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1590
1591         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_LOGO);
1592         return ndlp->nlp_state;
1593 }
1594
1595 static uint32_t
1596 lpfc_rcv_padisc_unmap_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1597                            void *arg, uint32_t evt)
1598 {
1599         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1600
1601         lpfc_rcv_padisc(vport, ndlp, cmdiocb);
1602         return ndlp->nlp_state;
1603 }
1604
1605 static uint32_t
1606 lpfc_rcv_prlo_unmap_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1607                          void *arg, uint32_t evt)
1608 {
1609         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1610
1611         lpfc_els_rsp_acc(vport, ELS_CMD_PRLO, cmdiocb, ndlp, NULL);
1612         return ndlp->nlp_state;
1613 }
1614
1615 static uint32_t
1616 lpfc_device_recov_unmap_node(struct lpfc_vport *vport,
1617                              struct lpfc_nodelist *ndlp,
1618                              void *arg,
1619                              uint32_t evt)
1620 {
1621         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1622
1623         ndlp->nlp_prev_state = NLP_STE_UNMAPPED_NODE;
1624         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1625         spin_lock_irq(shost->host_lock);
1626         ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
1627         spin_unlock_irq(shost->host_lock);
1628         lpfc_disc_set_adisc(vport, ndlp);
1629
1630         return ndlp->nlp_state;
1631 }
1632
1633 static uint32_t
1634 lpfc_rcv_plogi_mapped_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1635                            void *arg, uint32_t evt)
1636 {
1637         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1638
1639         lpfc_rcv_plogi(vport, ndlp, cmdiocb);
1640         return ndlp->nlp_state;
1641 }
1642
1643 static uint32_t
1644 lpfc_rcv_prli_mapped_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1645                           void *arg, uint32_t evt)
1646 {
1647         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1648
1649         lpfc_els_rsp_prli_acc(vport, cmdiocb, ndlp);
1650         return ndlp->nlp_state;
1651 }
1652
1653 static uint32_t
1654 lpfc_rcv_logo_mapped_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1655                           void *arg, uint32_t evt)
1656 {
1657         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1658
1659         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_LOGO);
1660         return ndlp->nlp_state;
1661 }
1662
1663 static uint32_t
1664 lpfc_rcv_padisc_mapped_node(struct lpfc_vport *vport,
1665                             struct lpfc_nodelist *ndlp,
1666                             void *arg, uint32_t evt)
1667 {
1668         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1669
1670         lpfc_rcv_padisc(vport, ndlp, cmdiocb);
1671         return ndlp->nlp_state;
1672 }
1673
1674 static uint32_t
1675 lpfc_rcv_prlo_mapped_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1676                           void *arg, uint32_t evt)
1677 {
1678         struct lpfc_hba  *phba = vport->phba;
1679         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1680
1681         /* flush the target */
1682         lpfc_sli_abort_iocb(vport, &phba->sli.ring[phba->sli.fcp_ring],
1683                             ndlp->nlp_sid, 0, LPFC_CTX_TGT);
1684
1685         /* Treat like rcv logo */
1686         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_PRLO);
1687         return ndlp->nlp_state;
1688 }
1689
1690 static uint32_t
1691 lpfc_device_recov_mapped_node(struct lpfc_vport *vport,
1692                               struct lpfc_nodelist *ndlp,
1693                               void *arg,
1694                               uint32_t evt)
1695 {
1696         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1697
1698         ndlp->nlp_prev_state = NLP_STE_MAPPED_NODE;
1699         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
1700         spin_lock_irq(shost->host_lock);
1701         ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
1702         spin_unlock_irq(shost->host_lock);
1703         lpfc_disc_set_adisc(vport, ndlp);
1704         return ndlp->nlp_state;
1705 }
1706
1707 static uint32_t
1708 lpfc_rcv_plogi_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1709                         void *arg, uint32_t evt)
1710 {
1711         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1712         struct lpfc_iocbq *cmdiocb  = (struct lpfc_iocbq *) arg;
1713
1714         /* Ignore PLOGI if we have an outstanding LOGO */
1715         if (ndlp->nlp_flag & (NLP_LOGO_SND | NLP_LOGO_ACC))
1716                 return ndlp->nlp_state;
1717         if (lpfc_rcv_plogi(vport, ndlp, cmdiocb)) {
1718                 lpfc_cancel_retry_delay_tmo(vport, ndlp);
1719                 spin_lock_irq(shost->host_lock);
1720                 ndlp->nlp_flag &= ~(NLP_NPR_ADISC | NLP_NPR_2B_DISC);
1721                 spin_unlock_irq(shost->host_lock);
1722         } else if (!(ndlp->nlp_flag & NLP_NPR_2B_DISC)) {
1723                 /* send PLOGI immediately, move to PLOGI issue state */
1724                 if (!(ndlp->nlp_flag & NLP_DELAY_TMO)) {
1725                         ndlp->nlp_prev_state = NLP_STE_NPR_NODE;
1726                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
1727                         lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0);
1728                 }
1729         }
1730         return ndlp->nlp_state;
1731 }
1732
1733 static uint32_t
1734 lpfc_rcv_prli_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1735                        void *arg, uint32_t evt)
1736 {
1737         struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
1738         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1739         struct ls_rjt     stat;
1740
1741         memset(&stat, 0, sizeof (struct ls_rjt));
1742         stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
1743         stat.un.b.lsRjtRsnCodeExp = LSEXP_NOTHING_MORE;
1744         lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb, ndlp, NULL);
1745
1746         if (!(ndlp->nlp_flag & NLP_DELAY_TMO)) {
1747                 if (ndlp->nlp_flag & NLP_NPR_ADISC) {
1748                         spin_lock_irq(shost->host_lock);
1749                         ndlp->nlp_flag &= ~NLP_NPR_ADISC;
1750                         ndlp->nlp_prev_state = NLP_STE_NPR_NODE;
1751                         spin_unlock_irq(shost->host_lock);
1752                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_ADISC_ISSUE);
1753                         lpfc_issue_els_adisc(vport, ndlp, 0);
1754                 } else {
1755                         ndlp->nlp_prev_state = NLP_STE_NPR_NODE;
1756                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
1757                         lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0);
1758                 }
1759         }
1760         return ndlp->nlp_state;
1761 }
1762
1763 static uint32_t
1764 lpfc_rcv_logo_npr_node(struct lpfc_vport *vport,  struct lpfc_nodelist *ndlp,
1765                        void *arg, uint32_t evt)
1766 {
1767         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1768
1769         lpfc_rcv_logo(vport, ndlp, cmdiocb, ELS_CMD_LOGO);
1770         return ndlp->nlp_state;
1771 }
1772
1773 static uint32_t
1774 lpfc_rcv_padisc_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1775                          void *arg, uint32_t evt)
1776 {
1777         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1778
1779         lpfc_rcv_padisc(vport, ndlp, cmdiocb);
1780         /*
1781          * Do not start discovery if discovery is about to start
1782          * or discovery in progress for this node. Starting discovery
1783          * here will affect the counting of discovery threads.
1784          */
1785         if (!(ndlp->nlp_flag & NLP_DELAY_TMO) &&
1786             !(ndlp->nlp_flag & NLP_NPR_2B_DISC)) {
1787                 if (ndlp->nlp_flag & NLP_NPR_ADISC) {
1788                         ndlp->nlp_flag &= ~NLP_NPR_ADISC;
1789                         ndlp->nlp_prev_state = NLP_STE_NPR_NODE;
1790                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_ADISC_ISSUE);
1791                         lpfc_issue_els_adisc(vport, ndlp, 0);
1792                 } else {
1793                         ndlp->nlp_prev_state = NLP_STE_NPR_NODE;
1794                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_PLOGI_ISSUE);
1795                         lpfc_issue_els_plogi(vport, ndlp->nlp_DID, 0);
1796                 }
1797         }
1798         return ndlp->nlp_state;
1799 }
1800
1801 static uint32_t
1802 lpfc_rcv_prlo_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1803                        void *arg, uint32_t evt)
1804 {
1805         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1806         struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *) arg;
1807
1808         spin_lock_irq(shost->host_lock);
1809         ndlp->nlp_flag |= NLP_LOGO_ACC;
1810         spin_unlock_irq(shost->host_lock);
1811
1812         lpfc_els_rsp_acc(vport, ELS_CMD_ACC, cmdiocb, ndlp, NULL);
1813
1814         if ((ndlp->nlp_flag & NLP_DELAY_TMO) == 0) {
1815                 mod_timer(&ndlp->nlp_delayfunc, jiffies + HZ * 1);
1816                 spin_lock_irq(shost->host_lock);
1817                 ndlp->nlp_flag |= NLP_DELAY_TMO;
1818                 ndlp->nlp_flag &= ~NLP_NPR_ADISC;
1819                 spin_unlock_irq(shost->host_lock);
1820                 ndlp->nlp_last_elscmd = ELS_CMD_PLOGI;
1821         } else {
1822                 spin_lock_irq(shost->host_lock);
1823                 ndlp->nlp_flag &= ~NLP_NPR_ADISC;
1824                 spin_unlock_irq(shost->host_lock);
1825         }
1826         return ndlp->nlp_state;
1827 }
1828
1829 static uint32_t
1830 lpfc_cmpl_plogi_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1831                          void *arg, uint32_t evt)
1832 {
1833         struct lpfc_iocbq *cmdiocb, *rspiocb;
1834         IOCB_t *irsp;
1835
1836         cmdiocb = (struct lpfc_iocbq *) arg;
1837         rspiocb = cmdiocb->context_un.rsp_iocb;
1838
1839         irsp = &rspiocb->iocb;
1840         if (irsp->ulpStatus) {
1841                 ndlp->nlp_flag |= NLP_DEFER_RM;
1842                 return NLP_STE_FREED_NODE;
1843         }
1844         return ndlp->nlp_state;
1845 }
1846
1847 static uint32_t
1848 lpfc_cmpl_prli_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1849                         void *arg, uint32_t evt)
1850 {
1851         struct lpfc_iocbq *cmdiocb, *rspiocb;
1852         IOCB_t *irsp;
1853
1854         cmdiocb = (struct lpfc_iocbq *) arg;
1855         rspiocb = cmdiocb->context_un.rsp_iocb;
1856
1857         irsp = &rspiocb->iocb;
1858         if (irsp->ulpStatus && (ndlp->nlp_flag & NLP_NODEV_REMOVE)) {
1859                 lpfc_drop_node(vport, ndlp);
1860                 return NLP_STE_FREED_NODE;
1861         }
1862         return ndlp->nlp_state;
1863 }
1864
1865 static uint32_t
1866 lpfc_cmpl_logo_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1867                         void *arg, uint32_t evt)
1868 {
1869         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1870         if (ndlp->nlp_DID == Fabric_DID) {
1871                 spin_lock_irq(shost->host_lock);
1872                 vport->fc_flag &= ~(FC_FABRIC | FC_PUBLIC_LOOP);
1873                 spin_unlock_irq(shost->host_lock);
1874         }
1875         lpfc_unreg_rpi(vport, ndlp);
1876         return ndlp->nlp_state;
1877 }
1878
1879 static uint32_t
1880 lpfc_cmpl_adisc_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1881                          void *arg, uint32_t evt)
1882 {
1883         struct lpfc_iocbq *cmdiocb, *rspiocb;
1884         IOCB_t *irsp;
1885
1886         cmdiocb = (struct lpfc_iocbq *) arg;
1887         rspiocb = cmdiocb->context_un.rsp_iocb;
1888
1889         irsp = &rspiocb->iocb;
1890         if (irsp->ulpStatus && (ndlp->nlp_flag & NLP_NODEV_REMOVE)) {
1891                 lpfc_drop_node(vport, ndlp);
1892                 return NLP_STE_FREED_NODE;
1893         }
1894         return ndlp->nlp_state;
1895 }
1896
1897 static uint32_t
1898 lpfc_cmpl_reglogin_npr_node(struct lpfc_vport *vport,
1899                             struct lpfc_nodelist *ndlp,
1900                             void *arg, uint32_t evt)
1901 {
1902         LPFC_MBOXQ_t *pmb = (LPFC_MBOXQ_t *) arg;
1903         MAILBOX_t    *mb = &pmb->u.mb;
1904
1905         if (!mb->mbxStatus) {
1906                 ndlp->nlp_rpi = mb->un.varWords[0];
1907                 ndlp->nlp_flag |= NLP_RPI_VALID;
1908         } else {
1909                 if (ndlp->nlp_flag & NLP_NODEV_REMOVE) {
1910                         lpfc_drop_node(vport, ndlp);
1911                         return NLP_STE_FREED_NODE;
1912                 }
1913         }
1914         return ndlp->nlp_state;
1915 }
1916
1917 static uint32_t
1918 lpfc_device_rm_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1919                         void *arg, uint32_t evt)
1920 {
1921         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1922
1923         if (ndlp->nlp_flag & NLP_NPR_2B_DISC) {
1924                 spin_lock_irq(shost->host_lock);
1925                 ndlp->nlp_flag |= NLP_NODEV_REMOVE;
1926                 spin_unlock_irq(shost->host_lock);
1927                 return ndlp->nlp_state;
1928         }
1929         lpfc_drop_node(vport, ndlp);
1930         return NLP_STE_FREED_NODE;
1931 }
1932
1933 static uint32_t
1934 lpfc_device_recov_npr_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1935                            void *arg, uint32_t evt)
1936 {
1937         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1938
1939         /* Don't do anything that will mess up processing of the
1940          * previous RSCN.
1941          */
1942         if (vport->fc_flag & FC_RSCN_DEFERRED)
1943                 return ndlp->nlp_state;
1944
1945         lpfc_cancel_retry_delay_tmo(vport, ndlp);
1946         spin_lock_irq(shost->host_lock);
1947         ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
1948         spin_unlock_irq(shost->host_lock);
1949         return ndlp->nlp_state;
1950 }
1951
1952
1953 /* This next section defines the NPort Discovery State Machine */
1954
1955 /* There are 4 different double linked lists nodelist entries can reside on.
1956  * The plogi list and adisc list are used when Link Up discovery or RSCN
1957  * processing is needed. Each list holds the nodes that we will send PLOGI
1958  * or ADISC on. These lists will keep track of what nodes will be effected
1959  * by an RSCN, or a Link Up (Typically, all nodes are effected on Link Up).
1960  * The unmapped_list will contain all nodes that we have successfully logged
1961  * into at the Fibre Channel level. The mapped_list will contain all nodes
1962  * that are mapped FCP targets.
1963  */
1964 /*
1965  * The bind list is a list of undiscovered (potentially non-existent) nodes
1966  * that we have saved binding information on. This information is used when
1967  * nodes transition from the unmapped to the mapped list.
1968  */
1969 /* For UNUSED_NODE state, the node has just been allocated .
1970  * For PLOGI_ISSUE and REG_LOGIN_ISSUE, the node is on
1971  * the PLOGI list. For REG_LOGIN_COMPL, the node is taken off the PLOGI list
1972  * and put on the unmapped list. For ADISC processing, the node is taken off
1973  * the ADISC list and placed on either the mapped or unmapped list (depending
1974  * on its previous state). Once on the unmapped list, a PRLI is issued and the
1975  * state changed to PRLI_ISSUE. When the PRLI completion occurs, the state is
1976  * changed to UNMAPPED_NODE. If the completion indicates a mapped
1977  * node, the node is taken off the unmapped list. The binding list is checked
1978  * for a valid binding, or a binding is automatically assigned. If binding
1979  * assignment is unsuccessful, the node is left on the unmapped list. If
1980  * binding assignment is successful, the associated binding list entry (if
1981  * any) is removed, and the node is placed on the mapped list.
1982  */
1983 /*
1984  * For a Link Down, all nodes on the ADISC, PLOGI, unmapped or mapped
1985  * lists will receive a DEVICE_RECOVERY event. If the linkdown or devloss timers
1986  * expire, all effected nodes will receive a DEVICE_RM event.
1987  */
1988 /*
1989  * For a Link Up or RSCN, all nodes will move from the mapped / unmapped lists
1990  * to either the ADISC or PLOGI list.  After a Nameserver query or ALPA loopmap
1991  * check, additional nodes may be added or removed (via DEVICE_RM) to / from
1992  * the PLOGI or ADISC lists. Once the PLOGI and ADISC lists are populated,
1993  * we will first process the ADISC list.  32 entries are processed initially and
1994  * ADISC is initited for each one.  Completions / Events for each node are
1995  * funnelled thru the state machine.  As each node finishes ADISC processing, it
1996  * starts ADISC for any nodes waiting for ADISC processing. If no nodes are
1997  * waiting, and the ADISC list count is identically 0, then we are done. For
1998  * Link Up discovery, since all nodes on the PLOGI list are UNREG_LOGIN'ed, we
1999  * can issue a CLEAR_LA and reenable Link Events. Next we will process the PLOGI
2000  * list.  32 entries are processed initially and PLOGI is initited for each one.
2001  * Completions / Events for each node are funnelled thru the state machine.  As
2002  * each node finishes PLOGI processing, it starts PLOGI for any nodes waiting
2003  * for PLOGI processing. If no nodes are waiting, and the PLOGI list count is
2004  * indentically 0, then we are done. We have now completed discovery / RSCN
2005  * handling. Upon completion, ALL nodes should be on either the mapped or
2006  * unmapped lists.
2007  */
2008
2009 static uint32_t (*lpfc_disc_action[NLP_STE_MAX_STATE * NLP_EVT_MAX_EVENT])
2010      (struct lpfc_vport *, struct lpfc_nodelist *, void *, uint32_t) = {
2011         /* Action routine                  Event       Current State  */
2012         lpfc_rcv_plogi_unused_node,     /* RCV_PLOGI   UNUSED_NODE    */
2013         lpfc_rcv_els_unused_node,       /* RCV_PRLI        */
2014         lpfc_rcv_logo_unused_node,      /* RCV_LOGO        */
2015         lpfc_rcv_els_unused_node,       /* RCV_ADISC       */
2016         lpfc_rcv_els_unused_node,       /* RCV_PDISC       */
2017         lpfc_rcv_els_unused_node,       /* RCV_PRLO        */
2018         lpfc_disc_illegal,              /* CMPL_PLOGI      */
2019         lpfc_disc_illegal,              /* CMPL_PRLI       */
2020         lpfc_cmpl_logo_unused_node,     /* CMPL_LOGO       */
2021         lpfc_disc_illegal,              /* CMPL_ADISC      */
2022         lpfc_disc_illegal,              /* CMPL_REG_LOGIN  */
2023         lpfc_device_rm_unused_node,     /* DEVICE_RM       */
2024         lpfc_disc_illegal,              /* DEVICE_RECOVERY */
2025
2026         lpfc_rcv_plogi_plogi_issue,     /* RCV_PLOGI   PLOGI_ISSUE    */
2027         lpfc_rcv_prli_plogi_issue,      /* RCV_PRLI        */
2028         lpfc_rcv_logo_plogi_issue,      /* RCV_LOGO        */
2029         lpfc_rcv_els_plogi_issue,       /* RCV_ADISC       */
2030         lpfc_rcv_els_plogi_issue,       /* RCV_PDISC       */
2031         lpfc_rcv_els_plogi_issue,       /* RCV_PRLO        */
2032         lpfc_cmpl_plogi_plogi_issue,    /* CMPL_PLOGI      */
2033         lpfc_disc_illegal,              /* CMPL_PRLI       */
2034         lpfc_cmpl_logo_plogi_issue,     /* CMPL_LOGO       */
2035         lpfc_disc_illegal,              /* CMPL_ADISC      */
2036         lpfc_cmpl_reglogin_plogi_issue,/* CMPL_REG_LOGIN  */
2037         lpfc_device_rm_plogi_issue,     /* DEVICE_RM       */
2038         lpfc_device_recov_plogi_issue,  /* DEVICE_RECOVERY */
2039
2040         lpfc_rcv_plogi_adisc_issue,     /* RCV_PLOGI   ADISC_ISSUE    */
2041         lpfc_rcv_prli_adisc_issue,      /* RCV_PRLI        */
2042         lpfc_rcv_logo_adisc_issue,      /* RCV_LOGO        */
2043         lpfc_rcv_padisc_adisc_issue,    /* RCV_ADISC       */
2044         lpfc_rcv_padisc_adisc_issue,    /* RCV_PDISC       */
2045         lpfc_rcv_prlo_adisc_issue,      /* RCV_PRLO        */
2046         lpfc_disc_illegal,              /* CMPL_PLOGI      */
2047         lpfc_disc_illegal,              /* CMPL_PRLI       */
2048         lpfc_disc_illegal,              /* CMPL_LOGO       */
2049         lpfc_cmpl_adisc_adisc_issue,    /* CMPL_ADISC      */
2050         lpfc_disc_illegal,              /* CMPL_REG_LOGIN  */
2051         lpfc_device_rm_adisc_issue,     /* DEVICE_RM       */
2052         lpfc_device_recov_adisc_issue,  /* DEVICE_RECOVERY */
2053
2054         lpfc_rcv_plogi_reglogin_issue,  /* RCV_PLOGI  REG_LOGIN_ISSUE */
2055         lpfc_rcv_prli_reglogin_issue,   /* RCV_PLOGI       */
2056         lpfc_rcv_logo_reglogin_issue,   /* RCV_LOGO        */
2057         lpfc_rcv_padisc_reglogin_issue, /* RCV_ADISC       */
2058         lpfc_rcv_padisc_reglogin_issue, /* RCV_PDISC       */
2059         lpfc_rcv_prlo_reglogin_issue,   /* RCV_PRLO        */
2060         lpfc_cmpl_plogi_illegal,        /* CMPL_PLOGI      */
2061         lpfc_disc_illegal,              /* CMPL_PRLI       */
2062         lpfc_disc_illegal,              /* CMPL_LOGO       */
2063         lpfc_disc_illegal,              /* CMPL_ADISC      */
2064         lpfc_cmpl_reglogin_reglogin_issue,/* CMPL_REG_LOGIN  */
2065         lpfc_device_rm_reglogin_issue,  /* DEVICE_RM       */
2066         lpfc_device_recov_reglogin_issue,/* DEVICE_RECOVERY */
2067
2068         lpfc_rcv_plogi_prli_issue,      /* RCV_PLOGI   PRLI_ISSUE     */
2069         lpfc_rcv_prli_prli_issue,       /* RCV_PRLI        */
2070         lpfc_rcv_logo_prli_issue,       /* RCV_LOGO        */
2071         lpfc_rcv_padisc_prli_issue,     /* RCV_ADISC       */
2072         lpfc_rcv_padisc_prli_issue,     /* RCV_PDISC       */
2073         lpfc_rcv_prlo_prli_issue,       /* RCV_PRLO        */
2074         lpfc_cmpl_plogi_illegal,        /* CMPL_PLOGI      */
2075         lpfc_cmpl_prli_prli_issue,      /* CMPL_PRLI       */
2076         lpfc_disc_illegal,              /* CMPL_LOGO       */
2077         lpfc_disc_illegal,              /* CMPL_ADISC      */
2078         lpfc_disc_illegal,              /* CMPL_REG_LOGIN  */
2079         lpfc_device_rm_prli_issue,      /* DEVICE_RM       */
2080         lpfc_device_recov_prli_issue,   /* DEVICE_RECOVERY */
2081
2082         lpfc_rcv_plogi_unmap_node,      /* RCV_PLOGI   UNMAPPED_NODE  */
2083         lpfc_rcv_prli_unmap_node,       /* RCV_PRLI        */
2084         lpfc_rcv_logo_unmap_node,       /* RCV_LOGO        */
2085         lpfc_rcv_padisc_unmap_node,     /* RCV_ADISC       */
2086         lpfc_rcv_padisc_unmap_node,     /* RCV_PDISC       */
2087         lpfc_rcv_prlo_unmap_node,       /* RCV_PRLO        */
2088         lpfc_disc_illegal,              /* CMPL_PLOGI      */
2089         lpfc_disc_illegal,              /* CMPL_PRLI       */
2090         lpfc_disc_illegal,              /* CMPL_LOGO       */
2091         lpfc_disc_illegal,              /* CMPL_ADISC      */
2092         lpfc_disc_illegal,              /* CMPL_REG_LOGIN  */
2093         lpfc_disc_illegal,              /* DEVICE_RM       */
2094         lpfc_device_recov_unmap_node,   /* DEVICE_RECOVERY */
2095
2096         lpfc_rcv_plogi_mapped_node,     /* RCV_PLOGI   MAPPED_NODE    */
2097         lpfc_rcv_prli_mapped_node,      /* RCV_PRLI        */
2098         lpfc_rcv_logo_mapped_node,      /* RCV_LOGO        */
2099         lpfc_rcv_padisc_mapped_node,    /* RCV_ADISC       */
2100         lpfc_rcv_padisc_mapped_node,    /* RCV_PDISC       */
2101         lpfc_rcv_prlo_mapped_node,      /* RCV_PRLO        */
2102         lpfc_disc_illegal,              /* CMPL_PLOGI      */
2103         lpfc_disc_illegal,              /* CMPL_PRLI       */
2104         lpfc_disc_illegal,              /* CMPL_LOGO       */
2105         lpfc_disc_illegal,              /* CMPL_ADISC      */
2106         lpfc_disc_illegal,              /* CMPL_REG_LOGIN  */
2107         lpfc_disc_illegal,              /* DEVICE_RM       */
2108         lpfc_device_recov_mapped_node,  /* DEVICE_RECOVERY */
2109
2110         lpfc_rcv_plogi_npr_node,        /* RCV_PLOGI   NPR_NODE    */
2111         lpfc_rcv_prli_npr_node,         /* RCV_PRLI        */
2112         lpfc_rcv_logo_npr_node,         /* RCV_LOGO        */
2113         lpfc_rcv_padisc_npr_node,       /* RCV_ADISC       */
2114         lpfc_rcv_padisc_npr_node,       /* RCV_PDISC       */
2115         lpfc_rcv_prlo_npr_node,         /* RCV_PRLO        */
2116         lpfc_cmpl_plogi_npr_node,       /* CMPL_PLOGI      */
2117         lpfc_cmpl_prli_npr_node,        /* CMPL_PRLI       */
2118         lpfc_cmpl_logo_npr_node,        /* CMPL_LOGO       */
2119         lpfc_cmpl_adisc_npr_node,       /* CMPL_ADISC      */
2120         lpfc_cmpl_reglogin_npr_node,    /* CMPL_REG_LOGIN  */
2121         lpfc_device_rm_npr_node,        /* DEVICE_RM       */
2122         lpfc_device_recov_npr_node,     /* DEVICE_RECOVERY */
2123 };
2124
2125 int
2126 lpfc_disc_state_machine(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
2127                         void *arg, uint32_t evt)
2128 {
2129         uint32_t cur_state, rc;
2130         uint32_t(*func) (struct lpfc_vport *, struct lpfc_nodelist *, void *,
2131                          uint32_t);
2132         uint32_t got_ndlp = 0;
2133
2134         if (lpfc_nlp_get(ndlp))
2135                 got_ndlp = 1;
2136
2137         cur_state = ndlp->nlp_state;
2138
2139         /* DSM in event <evt> on NPort <nlp_DID> in state <cur_state> */
2140         lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
2141                          "0211 DSM in event x%x on NPort x%x in "
2142                          "state %d Data: x%x\n",
2143                          evt, ndlp->nlp_DID, cur_state, ndlp->nlp_flag);
2144
2145         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_DSM,
2146                  "DSM in:          evt:%d ste:%d did:x%x",
2147                 evt, cur_state, ndlp->nlp_DID);
2148
2149         func = lpfc_disc_action[(cur_state * NLP_EVT_MAX_EVENT) + evt];
2150         rc = (func) (vport, ndlp, arg, evt);
2151
2152         /* DSM out state <rc> on NPort <nlp_DID> */
2153         if (got_ndlp) {
2154                 lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
2155                          "0212 DSM out state %d on NPort x%x Data: x%x\n",
2156                          rc, ndlp->nlp_DID, ndlp->nlp_flag);
2157
2158                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_DSM,
2159                         "DSM out:         ste:%d did:x%x flg:x%x",
2160                         rc, ndlp->nlp_DID, ndlp->nlp_flag);
2161                 /* Decrement the ndlp reference count held for this function */
2162                 lpfc_nlp_put(ndlp);
2163         } else {
2164                 lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
2165                         "0213 DSM out state %d on NPort free\n", rc);
2166
2167                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_DSM,
2168                         "DSM out:         ste:%d did:x%x flg:x%x",
2169                         rc, 0, 0);
2170         }
2171
2172         return rc;
2173 }