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) 2004-2005 Emulex.  All rights reserved.           *
   5  * EMULEX and SLI are trademarks of Emulex.                        *
   6  * www.emulex.com                                                  *
   7  * Portions Copyright (C) 2004-2005 Christoph Hellwig              *
   8  *                                                                 *
   9  * This program is free software; you can redistribute it and/or   *
  10  * modify it under the terms of version 2 of the GNU General       *
  11  * Public License as published by the Free Software Foundation.    *
  12  * This program is distributed in the hope that it will be useful. *
  13  * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND          *
  14  * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,  *
  15  * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE      *
  16  * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
  17  * TO BE LEGALLY INVALID.  See the GNU General Public License for  *
  18  * more details, a copy of which can be found in the file COPYING  *
  19  * included with this package.                                     *
  20  *******************************************************************/
  21
  22 #include <linux/blkdev.h>
  23 #include <linux/pci.h>
  24 #include <linux/interrupt.h>
  25
  26 #include <scsi/scsi.h>
  27 #include <scsi/scsi_device.h>
  28 #include <scsi/scsi_host.h>
  29 #include <scsi/scsi_transport_fc.h>
  30
  31 #include "lpfc_hw.h"
  32 #include "lpfc_sli.h"
  33 #include "lpfc_disc.h"
  34 #include "lpfc_scsi.h"
  35 #include "lpfc.h"
  36 #include "lpfc_logmsg.h"
  37 #include "lpfc_crtn.h"
  38
  39
  40 /* Called to verify a rcv'ed ADISC was intended for us. */
  41 static int
  42 lpfc_check_adisc(struct lpfc_hba * phba, struct lpfc_nodelist * ndlp,
  43                  struct lpfc_name * nn, struct lpfc_name * pn)
  44 {
  45         /* Compare the ADISC rsp WWNN / WWPN matches our internal node
  46          * table entry for that node.
  47          */
  48         if (memcmp(nn, &ndlp->nlp_nodename, sizeof (struct lpfc_name)) != 0)
  49                 return (0);
  50
  51         if (memcmp(pn, &ndlp->nlp_portname, sizeof (struct lpfc_name)) != 0)
  52                 return (0);
  53
  54         /* we match, return success */
  55         return (1);
  56 }
  57
  58
  59 int
  60 lpfc_check_sparm(struct lpfc_hba * phba,
  61                  struct lpfc_nodelist * ndlp, struct serv_parm * sp,
  62                  uint32_t class)
  63 {
  64         volatile struct serv_parm *hsp = &phba->fc_sparam;
  65         /* First check for supported version */
  66
  67         /* Next check for class validity */
  68         if (sp->cls1.classValid) {
  69
  70                 if (sp->cls1.rcvDataSizeMsb > hsp->cls1.rcvDataSizeMsb)
  71                         sp->cls1.rcvDataSizeMsb = hsp->cls1.rcvDataSizeMsb;
  72                 if (sp->cls1.rcvDataSizeLsb > hsp->cls1.rcvDataSizeLsb)
  73                         sp->cls1.rcvDataSizeLsb = hsp->cls1.rcvDataSizeLsb;
  74         } else if (class == CLASS1) {
  75                 return (0);
  76         }
  77
  78         if (sp->cls2.classValid) {
  79
  80                 if (sp->cls2.rcvDataSizeMsb > hsp->cls2.rcvDataSizeMsb)
  81                         sp->cls2.rcvDataSizeMsb = hsp->cls2.rcvDataSizeMsb;
  82                 if (sp->cls2.rcvDataSizeLsb > hsp->cls2.rcvDataSizeLsb)
  83                         sp->cls2.rcvDataSizeLsb = hsp->cls2.rcvDataSizeLsb;
  84         } else if (class == CLASS2) {
  85                 return (0);
  86         }
  87
  88         if (sp->cls3.classValid) {
  89
  90                 if (sp->cls3.rcvDataSizeMsb > hsp->cls3.rcvDataSizeMsb)
  91                         sp->cls3.rcvDataSizeMsb = hsp->cls3.rcvDataSizeMsb;
  92                 if (sp->cls3.rcvDataSizeLsb > hsp->cls3.rcvDataSizeLsb)
  93                         sp->cls3.rcvDataSizeLsb = hsp->cls3.rcvDataSizeLsb;
  94         } else if (class == CLASS3) {
  95                 return (0);
  96         }
  97
  98         if (sp->cmn.bbRcvSizeMsb > hsp->cmn.bbRcvSizeMsb)
  99                 sp->cmn.bbRcvSizeMsb = hsp->cmn.bbRcvSizeMsb;
 100         if (sp->cmn.bbRcvSizeLsb > hsp->cmn.bbRcvSizeLsb)
 101                 sp->cmn.bbRcvSizeLsb = hsp->cmn.bbRcvSizeLsb;
 102
 103         /* If check is good, copy wwpn wwnn into ndlp */
 104         memcpy(&ndlp->nlp_nodename, &sp->nodeName, sizeof (struct lpfc_name));
 105         memcpy(&ndlp->nlp_portname, &sp->portName, sizeof (struct lpfc_name));
 106         return (1);
 107 }
 108
 109 static void *
 110 lpfc_check_elscmpl_iocb(struct lpfc_hba * phba,
 111                       struct lpfc_iocbq *cmdiocb,
 112                       struct lpfc_iocbq *rspiocb)
 113 {
 114         struct lpfc_dmabuf *pcmd, *prsp;
 115         uint32_t *lp;
 116         void     *ptr = NULL;
 117         IOCB_t   *irsp;
 118
 119         irsp = &rspiocb->iocb;
 120         pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
 121
 122         /* For lpfc_els_abort, context2 could be zero'ed to delay
 123          * freeing associated memory till after ABTS completes.
 124          */
 125         if (pcmd) {
 126                 prsp =  list_get_first(&pcmd->list, struct lpfc_dmabuf,
 127                                        list);
 128                 if (prsp) {
 129                         lp = (uint32_t *) prsp->virt;
 130                         ptr = (void *)((uint8_t *)lp + sizeof(uint32_t));
 131                 }
 132         }
 133         else {
 134                 /* Force ulpStatus error since we are returning NULL ptr */
 135                 if (!(irsp->ulpStatus)) {
 136                         irsp->ulpStatus = IOSTAT_LOCAL_REJECT;
 137                         irsp->un.ulpWord[4] = IOERR_SLI_ABORTED;
 138                 }
 139                 ptr = NULL;
 140         }
 141         return (ptr);
 142 }
 143
 144
 145 /*
 146  * Free resources / clean up outstanding I/Os
 147  * associated with a LPFC_NODELIST entry. This
 148  * routine effectively results in a "software abort".
 149  */
 150 int
 151 lpfc_els_abort(struct lpfc_hba * phba, struct lpfc_nodelist * ndlp,
 152         int send_abts)
 153 {
 154         struct lpfc_sli *psli;
 155         struct lpfc_sli_ring *pring;
 156         struct lpfc_iocbq *iocb, *next_iocb;
 157         IOCB_t *icmd;
 158         int    found = 0;
 159
 160         /* Abort outstanding I/O on NPort <nlp_DID> */
 161         lpfc_printf_log(phba, KERN_INFO, LOG_DISCOVERY,
 162                         "%d:0201 Abort outstanding I/O on NPort x%x "
 163                         "Data: x%x x%x x%x\n",
 164                         phba->brd_no, ndlp->nlp_DID, ndlp->nlp_flag,
 165                         ndlp->nlp_state, ndlp->nlp_rpi);
 166
 167         psli = &phba->sli;
 168         pring = &psli->ring[LPFC_ELS_RING];
 169
 170         /* First check the txq */
 171         do {
 172                 found = 0;
 173                 spin_lock_irq(phba->host->host_lock);
 174                 list_for_each_entry_safe(iocb, next_iocb, &pring->txq, list) {
 175                         /* Check to see if iocb matches the nport we are looking
 176                            for */
 177                         if ((lpfc_check_sli_ndlp(phba, pring, iocb, ndlp))) {
 178                                 found = 1;
 179                                 /* It matches, so deque and call compl with an
 180                                    error */
 181                                 list_del(&iocb->list);
 182                                 pring->txq_cnt--;
 183                                 if (iocb->iocb_cmpl) {
 184                                         icmd = &iocb->iocb;
 185                                         icmd->ulpStatus = IOSTAT_LOCAL_REJECT;
 186                                         icmd->un.ulpWord[4] = IOERR_SLI_ABORTED;
 187                                         spin_unlock_irq(phba->host->host_lock);
 188                                         (iocb->iocb_cmpl) (phba, iocb, iocb);
 189                                         spin_lock_irq(phba->host->host_lock);
 190                                 } else {
 191                                         list_add_tail(&iocb->list,
 192                                                         &phba->lpfc_iocb_list);
 193                                 }
 194                                 break;
 195                         }
 196                 }
 197                 spin_unlock_irq(phba->host->host_lock);
 198         } while (found);
 199
 200         /* Everything on txcmplq will be returned by firmware
 201          * with a no rpi / linkdown / abort error.  For ring 0,
 202          * ELS discovery, we want to get rid of it right here.
 203          */
 204         /* Next check the txcmplq */
 205         do {
 206                 found = 0;
 207                 spin_lock_irq(phba->host->host_lock);
 208                 list_for_each_entry_safe(iocb, next_iocb, &pring->txcmplq,
 209                                          list) {
 210                         /* Check to see if iocb matches the nport we are looking
 211                            for */
 212                         if ((lpfc_check_sli_ndlp (phba, pring, iocb, ndlp))) {
 213                                 found = 1;
 214                                 /* It matches, so deque and call compl with an
 215                                    error */
 216                                 list_del(&iocb->list);
 217                                 pring->txcmplq_cnt--;
 218
 219                                 icmd = &iocb->iocb;
 220                                 /* If the driver is completing an ELS
 221                                  * command early, flush it out of the firmware.
 222                                  */
 223                                 if (send_abts &&
 224                                    (icmd->ulpCommand == CMD_ELS_REQUEST64_CR) &&
 225                                    (icmd->un.elsreq64.bdl.ulpIoTag32)) {
 226                                         lpfc_sli_issue_abort_iotag32(phba,
 227                                                              pring, iocb);
 228                                 }
 229                                 if (iocb->iocb_cmpl) {
 230                                         icmd->ulpStatus = IOSTAT_LOCAL_REJECT;
 231                                         icmd->un.ulpWord[4] = IOERR_SLI_ABORTED;
 232                                         spin_unlock_irq(phba->host->host_lock);
 233                                         (iocb->iocb_cmpl) (phba, iocb, iocb);
 234                                         spin_lock_irq(phba->host->host_lock);
 235                                 } else {
 236                                         list_add_tail(&iocb->list,
 237                                                         &phba->lpfc_iocb_list);
 238                                 }
 239                                 break;
 240                         }
 241                 }
 242                 spin_unlock_irq(phba->host->host_lock);
 243         } while(found);
 244
 245         /* If we are delaying issuing an ELS command, cancel it */
 246         if (ndlp->nlp_flag & NLP_DELAY_TMO) {
 247                 ndlp->nlp_flag &= ~NLP_DELAY_TMO;
 248                 del_timer_sync(&ndlp->nlp_delayfunc);
 249                 if (!list_empty(&ndlp->els_retry_evt.evt_listp))
 250                         list_del_init(&ndlp->els_retry_evt.evt_listp);
 251         }
 252         return (0);
 253 }
 254
 255 static int
 256 lpfc_rcv_plogi(struct lpfc_hba * phba,
 257                       struct lpfc_nodelist * ndlp,
 258                       struct lpfc_iocbq *cmdiocb)
 259 {
 260         struct lpfc_dmabuf *pcmd;
 261         uint32_t *lp;
 262         IOCB_t *icmd;
 263         struct serv_parm *sp;
 264         LPFC_MBOXQ_t *mbox;
 265         struct ls_rjt stat;
 266         int rc;
 267
 268         memset(&stat, 0, sizeof (struct ls_rjt));
 269         if (phba->hba_state <= LPFC_FLOGI) {
 270                 /* Before responding to PLOGI, check for pt2pt mode.
 271                  * If we are pt2pt, with an outstanding FLOGI, abort
 272                  * the FLOGI and resend it first.
 273                  */
 274                 if (phba->fc_flag & FC_PT2PT) {
 275                         lpfc_els_abort_flogi(phba);
 276                         if (!(phba->fc_flag & FC_PT2PT_PLOGI)) {
 277                                 /* If the other side is supposed to initiate
 278                                  * the PLOGI anyway, just ACC it now and
 279                                  * move on with discovery.
 280                                  */
 281                                 phba->fc_edtov = FF_DEF_EDTOV;
 282                                 phba->fc_ratov = FF_DEF_RATOV;
 283                                 /* Start discovery - this should just do
 284                                    CLEAR_LA */
 285                                 lpfc_disc_start(phba);
 286                         }
 287                         else {
 288                                 lpfc_initial_flogi(phba);
 289                         }
 290                 }
 291                 else {
 292                         stat.un.b.lsRjtRsnCode = LSRJT_LOGICAL_BSY;
 293                         stat.un.b.lsRjtRsnCodeExp = LSEXP_NOTHING_MORE;
 294                         lpfc_els_rsp_reject(phba, stat.un.lsRjtError, cmdiocb,
 295                                             ndlp);
 296                         return 0;
 297                 }
 298         }
 299         pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
 300         lp = (uint32_t *) pcmd->virt;
 301         sp = (struct serv_parm *) ((uint8_t *) lp + sizeof (uint32_t));
 302         if ((lpfc_check_sparm(phba, ndlp, sp, CLASS3) == 0)) {
 303                 /* Reject this request because invalid parameters */
 304                 stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
 305                 stat.un.b.lsRjtRsnCodeExp = LSEXP_SPARM_OPTIONS;
 306                 lpfc_els_rsp_reject(phba, stat.un.lsRjtError, cmdiocb, ndlp);
 307                 return (0);
 308         }
 309         icmd = &cmdiocb->iocb;
 310
 311         /* PLOGI chkparm OK */
 312         lpfc_printf_log(phba,
 313                         KERN_INFO,
 314                         LOG_ELS,
 315                         "%d:0114 PLOGI chkparm OK Data: x%x x%x x%x x%x\n",
 316                         phba->brd_no,
 317                         ndlp->nlp_DID, ndlp->nlp_state, ndlp->nlp_flag,
 318                         ndlp->nlp_rpi);
 319
 320         if ((phba->cfg_fcp_class == 2) &&
 321             (sp->cls2.classValid)) {
 322                 ndlp->nlp_fcp_info |= CLASS2;
 323         } else {
 324                 ndlp->nlp_fcp_info |= CLASS3;
 325         }
 326         ndlp->nlp_class_sup = 0;
 327         if (sp->cls1.classValid)
 328                 ndlp->nlp_class_sup |= FC_COS_CLASS1;
 329         if (sp->cls2.classValid)
 330                 ndlp->nlp_class_sup |= FC_COS_CLASS2;
 331         if (sp->cls3.classValid)
 332                 ndlp->nlp_class_sup |= FC_COS_CLASS3;
 333         if (sp->cls4.classValid)
 334                 ndlp->nlp_class_sup |= FC_COS_CLASS4;
 335         ndlp->nlp_maxframe =
 336                 ((sp->cmn.bbRcvSizeMsb & 0x0F) << 8) | sp->cmn.bbRcvSizeLsb;
 337
 338         /* no need to reg_login if we are already in one of these states */
 339         switch(ndlp->nlp_state) {
 340         case  NLP_STE_NPR_NODE:
 341                 if (!(ndlp->nlp_flag & NLP_NPR_ADISC))
 342                         break;
 343         case  NLP_STE_REG_LOGIN_ISSUE:
 344         case  NLP_STE_PRLI_ISSUE:
 345         case  NLP_STE_UNMAPPED_NODE:
 346         case  NLP_STE_MAPPED_NODE:
 347                 lpfc_els_rsp_acc(phba, ELS_CMD_PLOGI, cmdiocb, ndlp, NULL, 0);
 348                 return (1);
 349         }
 350
 351         if ((phba->fc_flag & FC_PT2PT)
 352             && !(phba->fc_flag & FC_PT2PT_PLOGI)) {
 353                 /* rcv'ed PLOGI decides what our NPortId will be */
 354                 phba->fc_myDID = icmd->un.rcvels.parmRo;
 355                 mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
 356                 if (mbox == NULL)
 357                         goto out;
 358                 lpfc_config_link(phba, mbox);
 359                 mbox->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
 360                 rc = lpfc_sli_issue_mbox
 361                         (phba, mbox, (MBX_NOWAIT | MBX_STOP_IOCB));
 362                 if (rc == MBX_NOT_FINISHED) {
 363                         mempool_free( mbox, phba->mbox_mem_pool);
 364                         goto out;
 365                 }
 366
 367                 lpfc_can_disctmo(phba);
 368         }
 369         mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
 370         if (mbox == NULL)
 371                 goto out;
 372
 373         if (lpfc_reg_login(phba, icmd->un.rcvels.remoteID,
 374                            (uint8_t *) sp, mbox, 0)) {
 375                 mempool_free( mbox, phba->mbox_mem_pool);
 376                 goto out;
 377         }
 378
 379         /* ACC PLOGI rsp command needs to execute first,
 380          * queue this mbox command to be processed later.
 381          */
 382         mbox->mbox_cmpl = lpfc_mbx_cmpl_reg_login;
 383         mbox->context2  = ndlp;
 384         ndlp->nlp_flag |= NLP_ACC_REGLOGIN;
 385
 386         /* If there is an outstanding PLOGI issued, abort it before
 387          * sending ACC rsp to PLOGI recieved.
 388          */
 389         if (ndlp->nlp_state == NLP_STE_PLOGI_ISSUE) {
 390                 /* software abort outstanding PLOGI */
 391                 lpfc_els_abort(phba, ndlp, 1);
 392         }
 393         ndlp->nlp_flag |= NLP_RCV_PLOGI;
 394         lpfc_els_rsp_acc(phba, ELS_CMD_PLOGI, cmdiocb, ndlp, mbox, 0);
 395         return (1);
 396
 397 out:
 398         stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
 399         stat.un.b.lsRjtRsnCodeExp = LSEXP_OUT_OF_RESOURCE;
 400         lpfc_els_rsp_reject(phba, stat.un.lsRjtError, cmdiocb, ndlp);
 401         return (0);
 402 }
 403
 404 static int
 405 lpfc_rcv_padisc(struct lpfc_hba * phba,
 406                 struct lpfc_nodelist * ndlp,
 407                 struct lpfc_iocbq *cmdiocb)
 408 {
 409         struct lpfc_dmabuf *pcmd;
 410         struct serv_parm *sp;
 411         struct lpfc_name *pnn, *ppn;
 412         struct ls_rjt stat;
 413         ADISC *ap;
 414         IOCB_t *icmd;
 415         uint32_t *lp;
 416         uint32_t cmd;
 417
 418         pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
 419         lp = (uint32_t *) pcmd->virt;
 420
 421         cmd = *lp++;
 422         if (cmd == ELS_CMD_ADISC) {
 423                 ap = (ADISC *) lp;
 424                 pnn = (struct lpfc_name *) & ap->nodeName;
 425                 ppn = (struct lpfc_name *) & ap->portName;
 426         } else {
 427                 sp = (struct serv_parm *) lp;
 428                 pnn = (struct lpfc_name *) & sp->nodeName;
 429                 ppn = (struct lpfc_name *) & sp->portName;
 430         }
 431
 432         icmd = &cmdiocb->iocb;
 433         if ((icmd->ulpStatus == 0) &&
 434             (lpfc_check_adisc(phba, ndlp, pnn, ppn))) {
 435                 if (cmd == ELS_CMD_ADISC) {
 436                         lpfc_els_rsp_adisc_acc(phba, cmdiocb, ndlp);
 437                 }
 438                 else {
 439                         lpfc_els_rsp_acc(phba, ELS_CMD_PLOGI, cmdiocb, ndlp,
 440                                 NULL, 0);
 441                 }
 442                 return (1);
 443         }
 444         /* Reject this request because invalid parameters */
 445         stat.un.b.lsRjtRsvd0 = 0;
 446         stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
 447         stat.un.b.lsRjtRsnCodeExp = LSEXP_SPARM_OPTIONS;
 448         stat.un.b.vendorUnique = 0;
 449         lpfc_els_rsp_reject(phba, stat.un.lsRjtError, cmdiocb, ndlp);
 450
 451         ndlp->nlp_last_elscmd = (unsigned long)ELS_CMD_PLOGI;
 452         /* 1 sec timeout */
 453         mod_timer(&ndlp->nlp_delayfunc, jiffies + HZ);
 454
 455         spin_lock_irq(phba->host->host_lock);
 456         ndlp->nlp_flag |= NLP_DELAY_TMO;
 457         spin_unlock_irq(phba->host->host_lock);
 458         ndlp->nlp_state = NLP_STE_NPR_NODE;
 459         lpfc_nlp_list(phba, ndlp, NLP_NPR_LIST);
 460         return (0);
 461 }
 462
 463 static int
 464 lpfc_rcv_logo(struct lpfc_hba * phba,
 465                       struct lpfc_nodelist * ndlp,
 466                       struct lpfc_iocbq *cmdiocb)
 467 {
 468         /* Put ndlp on NPR list with 1 sec timeout for plogi, ACC logo */
 469         /* Only call LOGO ACC for first LOGO, this avoids sending unnecessary
 470          * PLOGIs during LOGO storms from a device.
 471          */
 472         ndlp->nlp_flag |= NLP_LOGO_ACC;
 473         lpfc_els_rsp_acc(phba, ELS_CMD_ACC, cmdiocb, ndlp, NULL, 0);
 474
 475         if (!(ndlp->nlp_type & NLP_FABRIC)) {
 476                 /* Only try to re-login if this is NOT a Fabric Node */
 477                 ndlp->nlp_last_elscmd = (unsigned long)ELS_CMD_PLOGI;
 478                 mod_timer(&ndlp->nlp_delayfunc, jiffies + HZ * 1);
 479                 spin_lock_irq(phba->host->host_lock);
 480                 ndlp->nlp_flag |= NLP_DELAY_TMO;
 481                 spin_unlock_irq(phba->host->host_lock);
 482         }
 483
 484         ndlp->nlp_state = NLP_STE_NPR_NODE;
 485         lpfc_nlp_list(phba, ndlp, NLP_NPR_LIST);
 486
 487         ndlp->nlp_flag &= ~NLP_NPR_ADISC;
 488         /* The driver has to wait until the ACC completes before it continues
 489          * processing the LOGO.  The action will resume in
 490          * lpfc_cmpl_els_logo_acc routine. Since part of processing includes an
 491          * unreg_login, the driver waits so the ACC does not get aborted.
 492          */
 493         return (0);
 494 }
 495
 496 static void
 497 lpfc_rcv_prli(struct lpfc_hba * phba,
 498                       struct lpfc_nodelist * ndlp,
 499                       struct lpfc_iocbq *cmdiocb)
 500 {
 501         struct lpfc_dmabuf *pcmd;
 502         uint32_t *lp;
 503         PRLI *npr;
 504         struct fc_rport *rport = ndlp->rport;
 505         u32 roles;
 506
 507         pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
 508         lp = (uint32_t *) pcmd->virt;
 509         npr = (PRLI *) ((uint8_t *) lp + sizeof (uint32_t));
 510
 511         ndlp->nlp_type &= ~(NLP_FCP_TARGET | NLP_FCP_INITIATOR);
 512         ndlp->nlp_fcp_info &= ~NLP_FCP_2_DEVICE;
 513         if ((npr->acceptRspCode == PRLI_REQ_EXECUTED) &&
 514             (npr->prliType == PRLI_FCP_TYPE)) {
 515                 if (npr->initiatorFunc)
 516                         ndlp->nlp_type |= NLP_FCP_INITIATOR;
 517                 if (npr->targetFunc)
 518                         ndlp->nlp_type |= NLP_FCP_TARGET;
 519                 if (npr->Retry)
 520                         ndlp->nlp_fcp_info |= NLP_FCP_2_DEVICE;
 521         }
 522         if (rport) {
 523                 /* We need to update the rport role values */
 524                 roles = FC_RPORT_ROLE_UNKNOWN;
 525                 if (ndlp->nlp_type & NLP_FCP_INITIATOR)
 526                         roles |= FC_RPORT_ROLE_FCP_INITIATOR;
 527                 if (ndlp->nlp_type & NLP_FCP_TARGET)
 528                         roles |= FC_RPORT_ROLE_FCP_TARGET;
 529                 fc_remote_port_rolechg(rport, roles);
 530         }
 531 }
 532
 533 static uint32_t
 534 lpfc_disc_set_adisc(struct lpfc_hba * phba,
 535                       struct lpfc_nodelist * ndlp)
 536 {
 537         /* Check config parameter use-adisc or FCP-2 */
 538         if ((phba->cfg_use_adisc == 0) &&
 539                 !(phba->fc_flag & FC_RSCN_MODE)) {
 540                 if (!(ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE))
 541                         return (0);
 542         }
 543         spin_lock_irq(phba->host->host_lock);
 544         ndlp->nlp_flag |= NLP_NPR_ADISC;
 545         spin_unlock_irq(phba->host->host_lock);
 546         return (1);
 547 }
 548
 549 static uint32_t
 550 lpfc_disc_noop(struct lpfc_hba * phba,
 551                 struct lpfc_nodelist * ndlp, void *arg, uint32_t evt)
 552 {
 553         /* This routine does nothing, just return the current state */
 554         return (ndlp->nlp_state);
 555 }
 556
 557 static uint32_t
 558 lpfc_disc_illegal(struct lpfc_hba * phba,
 559                    struct lpfc_nodelist * ndlp, void *arg, uint32_t evt)
 560 {
 561         lpfc_printf_log(phba,
 562                         KERN_ERR,
 563                         LOG_DISCOVERY,
 564                         "%d:0253 Illegal State Transition: node x%x event x%x, "
 565                         "state x%x Data: x%x x%x\n",
 566                         phba->brd_no,
 567                         ndlp->nlp_DID, evt, ndlp->nlp_state, ndlp->nlp_rpi,
 568                         ndlp->nlp_flag);
 569         return (ndlp->nlp_state);
 570 }
 571
 572 /* Start of Discovery State Machine routines */
 573
 574 static uint32_t
 575 lpfc_rcv_plogi_unused_node(struct lpfc_hba * phba,
 576                            struct lpfc_nodelist * ndlp, void *arg, uint32_t evt)
 577 {
 578         struct lpfc_iocbq *cmdiocb;
 579
 580         cmdiocb = (struct lpfc_iocbq *) arg;
 581
 582         if (lpfc_rcv_plogi(phba, ndlp, cmdiocb)) {
 583                 ndlp->nlp_state = NLP_STE_UNUSED_NODE;
 584                 lpfc_nlp_list(phba, ndlp, NLP_UNUSED_LIST);
 585                 return (ndlp->nlp_state);
 586         }
 587         lpfc_nlp_list(phba, ndlp, NLP_NO_LIST);
 588         return (NLP_STE_FREED_NODE);
 589 }
 590
 591 static uint32_t
 592 lpfc_rcv_els_unused_node(struct lpfc_hba * phba,
 593                          struct lpfc_nodelist * ndlp, void *arg, uint32_t evt)
 594 {
 595         lpfc_issue_els_logo(phba, ndlp, 0);
 596         lpfc_nlp_list(phba, ndlp, NLP_UNUSED_LIST);
 597         return (ndlp->nlp_state);
 598 }
 599
 600 static uint32_t
 601 lpfc_rcv_logo_unused_node(struct lpfc_hba * phba,
 602                           struct lpfc_nodelist * ndlp, void *arg, uint32_t evt)
 603 {
 604         struct lpfc_iocbq     *cmdiocb;
 605
 606         cmdiocb = (struct lpfc_iocbq *) arg;
 607
 608         spin_lock_irq(phba->host->host_lock);
 609         ndlp->nlp_flag |= NLP_LOGO_ACC;
 610         spin_unlock_irq(phba->host->host_lock);
 611         lpfc_els_rsp_acc(phba, ELS_CMD_ACC, cmdiocb, ndlp, NULL, 0);
 612         lpfc_nlp_list(phba, ndlp, NLP_UNUSED_LIST);
 613
 614         return (ndlp->nlp_state);
 615 }
 616
 617 static uint32_t
 618 lpfc_cmpl_logo_unused_node(struct lpfc_hba * phba,
 619                           struct lpfc_nodelist * ndlp, void *arg, uint32_t evt)
 620 {
 621         lpfc_nlp_list(phba, ndlp, NLP_NO_LIST);
 622         return (NLP_STE_FREED_NODE);
 623 }
 624
 625 static uint32_t
 626 lpfc_device_rm_unused_node(struct lpfc_hba * phba,
 627                            struct lpfc_nodelist * ndlp, void *arg, uint32_t evt)
 628 {
 629         lpfc_nlp_list(phba, ndlp, NLP_NO_LIST);
 630         return (NLP_STE_FREED_NODE);
 631 }
 632
 633 static uint32_t
 634 lpfc_rcv_plogi_plogi_issue(struct lpfc_hba * phba, struct lpfc_nodelist * ndlp,
 635                            void *arg, uint32_t evt)
 636 {
 637         struct lpfc_iocbq *cmdiocb = arg;
 638         struct lpfc_dmabuf *pcmd;
 639         struct serv_parm *sp;
 640         uint32_t *lp;
 641         struct ls_rjt stat;
 642         int port_cmp;
 643
 644         pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
 645         lp = (uint32_t *) pcmd->virt;
 646         sp = (struct serv_parm *) ((uint8_t *) lp + sizeof (uint32_t));
 647
 648         memset(&stat, 0, sizeof (struct ls_rjt));
 649
 650         /* For a PLOGI, we only accept if our portname is less
 651          * than the remote portname.
 652          */
 653         phba->fc_stat.elsLogiCol++;
 654         port_cmp = memcmp(&phba->fc_portname, &sp->portName,
 655                           sizeof (struct lpfc_name));
 656
 657         if (port_cmp >= 0) {
 658                 /* Reject this request because the remote node will accept
 659                    ours */
 660                 stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
 661                 stat.un.b.lsRjtRsnCodeExp = LSEXP_CMD_IN_PROGRESS;
 662                 lpfc_els_rsp_reject(phba, stat.un.lsRjtError, cmdiocb, ndlp);
 663         }
 664         else {
 665                 lpfc_rcv_plogi(phba, ndlp, cmdiocb);
 666         } /* if our portname was less */
 667
 668         return (ndlp->nlp_state);
 669 }
 670
 671 static uint32_t
 672 lpfc_rcv_els_plogi_issue(struct lpfc_hba * phba,
 673                           struct lpfc_nodelist * ndlp, void *arg, uint32_t evt)
 674 {
 675         struct lpfc_iocbq     *cmdiocb;
 676
 677         cmdiocb = (struct lpfc_iocbq *) arg;
 678
 679         /* software abort outstanding PLOGI */
 680         lpfc_els_abort(phba, ndlp, 1);
 681         mod_timer(&ndlp->nlp_delayfunc, jiffies + HZ * 1);
 682         spin_lock_irq(phba->host->host_lock);
 683         ndlp->nlp_flag |= NLP_DELAY_TMO;
 684         spin_unlock_irq(phba->host->host_lock);
 685
 686         if (evt == NLP_EVT_RCV_LOGO) {
 687                 lpfc_els_rsp_acc(phba, ELS_CMD_ACC, cmdiocb, ndlp, NULL, 0);
 688         }
 689         else {
 690                 lpfc_issue_els_logo(phba, ndlp, 0);
 691         }
 692
 693         /* Put ndlp in npr list set plogi timer for 1 sec */
 694         ndlp->nlp_last_elscmd = (unsigned long)ELS_CMD_PLOGI;
 695         ndlp->nlp_state = NLP_STE_NPR_NODE;
 696         lpfc_nlp_list(phba, ndlp, NLP_NPR_LIST);
 697
 698         return (ndlp->nlp_state);
 699 }
 700
 701 static uint32_t
 702 lpfc_cmpl_plogi_plogi_issue(struct lpfc_hba * phba,
 703                             struct lpfc_nodelist * ndlp, void *arg,
 704                             uint32_t evt)
 705 {
 706         struct lpfc_iocbq *cmdiocb, *rspiocb;
 707         struct lpfc_dmabuf *pcmd, *prsp;
 708         uint32_t *lp;
 709         IOCB_t *irsp;
 710         struct serv_parm *sp;
 711         LPFC_MBOXQ_t *mbox;
 712
 713         cmdiocb = (struct lpfc_iocbq *) arg;
 714         rspiocb = cmdiocb->context_un.rsp_iocb;
 715
 716         if (ndlp->nlp_flag & NLP_ACC_REGLOGIN) {
 717                 return (ndlp->nlp_state);
 718         }
 719
 720         irsp = &rspiocb->iocb;
 721
 722         if (irsp->ulpStatus)
 723                 goto out;
 724
 725         pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
 726
 727         prsp = list_get_first(&pcmd->list,
 728                               struct lpfc_dmabuf,
 729                               list);
 730         lp = (uint32_t *) prsp->virt;
 731
 732         sp = (struct serv_parm *) ((uint8_t *) lp + sizeof (uint32_t));
 733         if (!lpfc_check_sparm(phba, ndlp, sp, CLASS3))
 734                 goto out;
 735
 736         /* PLOGI chkparm OK */
 737         lpfc_printf_log(phba,
 738                         KERN_INFO,
 739                         LOG_ELS,
 740                         "%d:0121 PLOGI chkparm OK "
 741                         "Data: x%x x%x x%x x%x\n",
 742                         phba->brd_no,
 743                         ndlp->nlp_DID, ndlp->nlp_state,
 744                         ndlp->nlp_flag, ndlp->nlp_rpi);
 745
 746         if ((phba->cfg_fcp_class == 2) &&
 747             (sp->cls2.classValid)) {
 748                 ndlp->nlp_fcp_info |= CLASS2;
 749         } else {
 750                 ndlp->nlp_fcp_info |= CLASS3;
 751         }
 752         ndlp->nlp_class_sup = 0;
 753         if (sp->cls1.classValid)
 754                 ndlp->nlp_class_sup |= FC_COS_CLASS1;
 755         if (sp->cls2.classValid)
 756                 ndlp->nlp_class_sup |= FC_COS_CLASS2;
 757         if (sp->cls3.classValid)
 758                 ndlp->nlp_class_sup |= FC_COS_CLASS3;
 759         if (sp->cls4.classValid)
 760                 ndlp->nlp_class_sup |= FC_COS_CLASS4;
 761         ndlp->nlp_maxframe =
 762                 ((sp->cmn.bbRcvSizeMsb & 0x0F) << 8) |
 763                 sp->cmn.bbRcvSizeLsb;
 764
 765         if (!(mbox = mempool_alloc(phba->mbox_mem_pool,
 766                                    GFP_KERNEL)))
 767                 goto out;
 768
 769         lpfc_unreg_rpi(phba, ndlp);
 770         if (lpfc_reg_login
 771             (phba, irsp->un.elsreq64.remoteID,
 772              (uint8_t *) sp, mbox, 0) == 0) {
 773                 /* set_slim mailbox command needs to
 774                  * execute first, queue this command to
 775                  * be processed later.
 776                  */
 777                 switch(ndlp->nlp_DID) {
 778                 case NameServer_DID:
 779                         mbox->mbox_cmpl =
 780                                 lpfc_mbx_cmpl_ns_reg_login;
 781                         break;
 782                 case FDMI_DID:
 783                         mbox->mbox_cmpl =
 784                                 lpfc_mbx_cmpl_fdmi_reg_login;
 785                         break;
 786                 default:
 787                         mbox->mbox_cmpl =
 788                                 lpfc_mbx_cmpl_reg_login;
 789                 }
 790                 mbox->context2 = ndlp;
 791                 if (lpfc_sli_issue_mbox(phba, mbox,
 792                                         (MBX_NOWAIT | MBX_STOP_IOCB))
 793                     != MBX_NOT_FINISHED) {
 794                         ndlp->nlp_state =
 795                                 NLP_STE_REG_LOGIN_ISSUE;
 796                         lpfc_nlp_list(phba, ndlp,
 797                                       NLP_REGLOGIN_LIST);
 798                         return (ndlp->nlp_state);
 799                 }
 800                 mempool_free(mbox, phba->mbox_mem_pool);
 801         } else {
 802                 mempool_free(mbox, phba->mbox_mem_pool);
 803         }
 804
 805
 806  out:
 807         /* Free this node since the driver cannot login or has the wrong
 808            sparm */
 809         lpfc_nlp_list(phba, ndlp, NLP_NO_LIST);
 810         return (NLP_STE_FREED_NODE);
 811 }
 812
 813 static uint32_t
 814 lpfc_device_rm_plogi_issue(struct lpfc_hba * phba,
 815                            struct lpfc_nodelist * ndlp, void *arg, uint32_t evt)
 816 {
 817         /* software abort outstanding PLOGI */
 818         lpfc_els_abort(phba, ndlp, 1);
 819
 820         lpfc_nlp_list(phba, ndlp, NLP_NO_LIST);
 821         return (NLP_STE_FREED_NODE);
 822 }
 823
 824 static uint32_t
 825 lpfc_device_recov_plogi_issue(struct lpfc_hba * phba,
 826                             struct lpfc_nodelist * ndlp, void *arg,
 827                             uint32_t evt)
 828 {
 829         /* software abort outstanding PLOGI */
 830         lpfc_els_abort(phba, ndlp, 1);
 831
 832         ndlp->nlp_state = NLP_STE_NPR_NODE;
 833         lpfc_nlp_list(phba, ndlp, NLP_NPR_LIST);
 834         spin_lock_irq(phba->host->host_lock);
 835         ndlp->nlp_flag &= ~NLP_NPR_2B_DISC;
 836         spin_unlock_irq(phba->host->host_lock);
 837
 838         return (ndlp->nlp_state);
 839 }
 840
 841 static uint32_t
 842 lpfc_rcv_plogi_adisc_issue(struct lpfc_hba * phba,
 843                             struct lpfc_nodelist * ndlp, void *arg,
 844                             uint32_t evt)
 845 {
 846         struct lpfc_iocbq *cmdiocb;
 847
 848         /* software abort outstanding ADISC */
 849         lpfc_els_abort(phba, ndlp, 1);
 850
 851         cmdiocb = (struct lpfc_iocbq *) arg;
 852
 853         if (lpfc_rcv_plogi(phba, ndlp, cmdiocb)) {
 854                 return (ndlp->nlp_state);
 855         }
 856         ndlp->nlp_state = NLP_STE_PLOGI_ISSUE;
 857         lpfc_nlp_list(phba, ndlp, NLP_PLOGI_LIST);
 858         lpfc_issue_els_plogi(phba, ndlp, 0);
 859
 860         return (ndlp->nlp_state);
 861 }
 862
 863 static uint32_t
 864 lpfc_rcv_prli_adisc_issue(struct lpfc_hba * phba,
 865                             struct lpfc_nodelist * ndlp, void *arg,
 866                             uint32_t evt)
 867 {
 868         struct lpfc_iocbq *cmdiocb;
 869
 870         cmdiocb = (struct lpfc_iocbq *) arg;
 871
 872         lpfc_els_rsp_prli_acc(phba, cmdiocb, ndlp);
 873         return (ndlp->nlp_state);
 874 }
 875
 876 static uint32_t
 877 lpfc_rcv_logo_adisc_issue(struct lpfc_hba * phba,
 878                             struct lpfc_nodelist * ndlp, void *arg,
 879                             uint32_t evt)
 880 {
 881         struct lpfc_iocbq *cmdiocb;
 882
 883         cmdiocb = (struct lpfc_iocbq *) arg;
 884
 885         /* software abort outstanding ADISC */
 886         lpfc_els_abort(phba, ndlp, 0);
 887
 888         lpfc_rcv_logo(phba, ndlp, cmdiocb);
 889         return (ndlp->nlp_state);
 890 }
 891
 892 static uint32_t
 893 lpfc_rcv_padisc_adisc_issue(struct lpfc_hba * phba,
 894                             struct lpfc_nodelist * ndlp, void *arg,
 895                             uint32_t evt)
 896 {
 897         struct lpfc_iocbq *cmdiocb;
 898
 899         cmdiocb = (struct lpfc_iocbq *) arg;
 900
 901         lpfc_rcv_padisc(phba, ndlp, cmdiocb);
 902         return (ndlp->nlp_state);
 903 }
 904
 905 static uint32_t
 906 lpfc_rcv_prlo_adisc_issue(struct lpfc_hba * phba,
 907                             struct lpfc_nodelist * ndlp, void *arg,
 908                             uint32_t evt)
 909 {
 910         struct lpfc_iocbq *cmdiocb;
 911
 912         cmdiocb = (struct lpfc_iocbq *) arg;
 913
 914         /* Treat like rcv logo */
 915         lpfc_rcv_logo(phba, ndlp, cmdiocb);
 916         return (ndlp->nlp_state);
 917 }
 918
 919 static uint32_t
 920 lpfc_cmpl_adisc_adisc_issue(struct lpfc_hba * phba,
 921                             struct lpfc_nodelist * ndlp, void *arg,
 922                             uint32_t evt)
 923 {
 924         struct lpfc_iocbq *cmdiocb, *rspiocb;
 925         IOCB_t *irsp;
 926         ADISC *ap;
 927
 928         cmdiocb = (struct lpfc_iocbq *) arg;
 929         rspiocb = cmdiocb->context_un.rsp_iocb;
 930
 931         ap = (ADISC *)lpfc_check_elscmpl_iocb(phba, cmdiocb, rspiocb);
 932         irsp = &rspiocb->iocb;
 933
 934         if ((irsp->ulpStatus) ||
 935                 (!lpfc_check_adisc(phba, ndlp, &ap->nodeName, &ap->portName))) {
 936                 ndlp->nlp_last_elscmd = (unsigned long)ELS_CMD_PLOGI;
 937                 /* 1 sec timeout */
 938                 mod_timer(&ndlp->nlp_delayfunc, jiffies + HZ);
 939                 spin_lock_irq(phba->host->host_lock);
 940                 ndlp->nlp_flag |= NLP_DELAY_TMO;
 941                 spin_unlock_irq(phba->host->host_lock);
 942
 943                 memset(&ndlp->nlp_nodename, 0, sizeof (struct lpfc_name));
 944                 memset(&ndlp->nlp_portname, 0, sizeof (struct lpfc_name));
 945
 946                 ndlp->nlp_state = NLP_STE_NPR_NODE;
 947                 lpfc_nlp_list(phba, ndlp, NLP_NPR_LIST);
 948                 lpfc_unreg_rpi(phba, ndlp);
 949                 return (ndlp->nlp_state);
 950         }
 951         if (ndlp->nlp_type & NLP_FCP_TARGET) {
 952                 ndlp->nlp_state = NLP_STE_MAPPED_NODE;
 953                 lpfc_nlp_list(phba, ndlp, NLP_MAPPED_LIST);
 954         } else {
 955                 ndlp->nlp_state = NLP_STE_UNMAPPED_NODE;
 956                 lpfc_nlp_list(phba, ndlp, NLP_UNMAPPED_LIST);
 957         }
 958         return (ndlp->nlp_state);
 959 }
 960
 961 static uint32_t
 962 lpfc_device_rm_adisc_issue(struct lpfc_hba * phba,
 963                             struct lpfc_nodelist * ndlp, void *arg,
 964                             uint32_t evt)
 965 {
 966         /* software abort outstanding ADISC */
 967         lpfc_els_abort(phba, ndlp, 1);
 968
 969         lpfc_nlp_list(phba, ndlp, NLP_NO_LIST);
 970         return (NLP_STE_FREED_NODE);
 971 }
 972
 973 static uint32_t
 974 lpfc_device_recov_adisc_issue(struct lpfc_hba * phba,
 975                             struct lpfc_nodelist * ndlp, void *arg,
 976                             uint32_t evt)
 977 {
 978         /* software abort outstanding ADISC */
 979         lpfc_els_abort(phba, ndlp, 1);
 980
 981         ndlp->nlp_state = NLP_STE_NPR_NODE;
 982         lpfc_nlp_list(phba, ndlp, NLP_NPR_LIST);
 983         spin_lock_irq(phba->host->host_lock);
 984         ndlp->nlp_flag &= ~NLP_NPR_2B_DISC;
 985         spin_unlock_irq(phba->host->host_lock);
 986
 987         lpfc_disc_set_adisc(phba, ndlp);
 988         return (ndlp->nlp_state);
 989 }
 990
 991 static uint32_t
 992 lpfc_rcv_plogi_reglogin_issue(struct lpfc_hba * phba,
 993                               struct lpfc_nodelist * ndlp, void *arg,
 994                               uint32_t evt)
 995 {
 996         struct lpfc_iocbq *cmdiocb;
 997
 998         cmdiocb = (struct lpfc_iocbq *) arg;
 999
1000         lpfc_rcv_plogi(phba, ndlp, cmdiocb);
1001         return (ndlp->nlp_state);
1002 }
1003
1004 static uint32_t
1005 lpfc_rcv_prli_reglogin_issue(struct lpfc_hba * phba,
1006                              struct lpfc_nodelist * ndlp, void *arg,
1007                              uint32_t evt)
1008 {
1009         struct lpfc_iocbq *cmdiocb;
1010
1011         cmdiocb = (struct lpfc_iocbq *) arg;
1012
1013         lpfc_els_rsp_prli_acc(phba, cmdiocb, ndlp);
1014         return (ndlp->nlp_state);
1015 }
1016
1017 static uint32_t
1018 lpfc_rcv_logo_reglogin_issue(struct lpfc_hba * phba,
1019                              struct lpfc_nodelist * ndlp, void *arg,
1020                              uint32_t evt)
1021 {
1022         struct lpfc_iocbq *cmdiocb;
1023
1024         cmdiocb = (struct lpfc_iocbq *) arg;
1025
1026         lpfc_rcv_logo(phba, ndlp, cmdiocb);
1027         return (ndlp->nlp_state);
1028 }
1029
1030 static uint32_t
1031 lpfc_rcv_padisc_reglogin_issue(struct lpfc_hba * phba,
1032                                struct lpfc_nodelist * ndlp, void *arg,
1033                                uint32_t evt)
1034 {
1035         struct lpfc_iocbq *cmdiocb;
1036
1037         cmdiocb = (struct lpfc_iocbq *) arg;
1038
1039         lpfc_rcv_padisc(phba, ndlp, cmdiocb);
1040         return (ndlp->nlp_state);
1041 }
1042
1043 static uint32_t
1044 lpfc_rcv_prlo_reglogin_issue(struct lpfc_hba * phba,
1045                              struct lpfc_nodelist * ndlp, void *arg,
1046                              uint32_t evt)
1047 {
1048         struct lpfc_iocbq *cmdiocb;
1049
1050         cmdiocb = (struct lpfc_iocbq *) arg;
1051         lpfc_els_rsp_acc(phba, ELS_CMD_ACC, cmdiocb, ndlp, NULL, 0);
1052         return (ndlp->nlp_state);
1053 }
1054
1055 static uint32_t
1056 lpfc_cmpl_reglogin_reglogin_issue(struct lpfc_hba * phba,
1057                                   struct lpfc_nodelist * ndlp,
1058                                   void *arg, uint32_t evt)
1059 {
1060         LPFC_MBOXQ_t *pmb;
1061         MAILBOX_t *mb;
1062         uint32_t did;
1063
1064         pmb = (LPFC_MBOXQ_t *) arg;
1065         mb = &pmb->mb;
1066         did = mb->un.varWords[1];
1067         if (mb->mbxStatus) {
1068                 /* RegLogin failed */
1069                 lpfc_printf_log(phba,
1070                                 KERN_ERR,
1071                                 LOG_DISCOVERY,
1072                                 "%d:0246 RegLogin failed Data: x%x x%x x%x\n",
1073                                 phba->brd_no,
1074                                 did, mb->mbxStatus, phba->hba_state);
1075
1076                 mod_timer(&ndlp->nlp_delayfunc, jiffies + HZ * 1);
1077                 spin_lock_irq(phba->host->host_lock);
1078                 ndlp->nlp_flag |= NLP_DELAY_TMO;
1079                 spin_unlock_irq(phba->host->host_lock);
1080
1081                 lpfc_issue_els_logo(phba, ndlp, 0);
1082                 /* Put ndlp in npr list set plogi timer for 1 sec */
1083                 ndlp->nlp_last_elscmd = (unsigned long)ELS_CMD_PLOGI;
1084                 ndlp->nlp_state = NLP_STE_NPR_NODE;
1085                 lpfc_nlp_list(phba, ndlp, NLP_NPR_LIST);
1086                 return (ndlp->nlp_state);
1087         }
1088
1089         ndlp->nlp_rpi = mb->un.varWords[0];
1090
1091         /* Only if we are not a fabric nport do we issue PRLI */
1092         if (!(ndlp->nlp_type & NLP_FABRIC)) {
1093                 ndlp->nlp_state = NLP_STE_PRLI_ISSUE;
1094                 lpfc_nlp_list(phba, ndlp, NLP_PRLI_LIST);
1095                 lpfc_issue_els_prli(phba, ndlp, 0);
1096         } else {
1097                 ndlp->nlp_state = NLP_STE_UNMAPPED_NODE;
1098                 lpfc_nlp_list(phba, ndlp, NLP_UNMAPPED_LIST);
1099         }
1100         return (ndlp->nlp_state);
1101 }
1102
1103 static uint32_t
1104 lpfc_device_rm_reglogin_issue(struct lpfc_hba * phba,
1105                               struct lpfc_nodelist * ndlp, void *arg,
1106                               uint32_t evt)
1107 {
1108         lpfc_nlp_list(phba, ndlp, NLP_NO_LIST);
1109         return (NLP_STE_FREED_NODE);
1110 }
1111
1112 static uint32_t
1113 lpfc_device_recov_reglogin_issue(struct lpfc_hba * phba,
1114                                struct lpfc_nodelist * ndlp, void *arg,
1115                                uint32_t evt)
1116 {
1117         ndlp->nlp_state = NLP_STE_NPR_NODE;
1118         lpfc_nlp_list(phba, ndlp, NLP_NPR_LIST);
1119         spin_lock_irq(phba->host->host_lock);
1120         ndlp->nlp_flag &= ~NLP_NPR_2B_DISC;
1121         spin_unlock_irq(phba->host->host_lock);
1122         return (ndlp->nlp_state);
1123 }
1124
1125 static uint32_t
1126 lpfc_rcv_plogi_prli_issue(struct lpfc_hba * phba,
1127                           struct lpfc_nodelist * ndlp, void *arg, uint32_t evt)
1128 {
1129         struct lpfc_iocbq *cmdiocb;
1130
1131         cmdiocb = (struct lpfc_iocbq *) arg;
1132
1133         lpfc_rcv_plogi(phba, ndlp, cmdiocb);
1134         return (ndlp->nlp_state);
1135 }
1136
1137 static uint32_t
1138 lpfc_rcv_prli_prli_issue(struct lpfc_hba * phba,
1139                          struct lpfc_nodelist * ndlp, void *arg, uint32_t evt)
1140 {
1141         struct lpfc_iocbq *cmdiocb;
1142
1143         cmdiocb = (struct lpfc_iocbq *) arg;
1144
1145         lpfc_els_rsp_prli_acc(phba, cmdiocb, ndlp);
1146         return (ndlp->nlp_state);
1147 }
1148
1149 static uint32_t
1150 lpfc_rcv_logo_prli_issue(struct lpfc_hba * phba,
1151                          struct lpfc_nodelist * ndlp, void *arg, uint32_t evt)
1152 {
1153         struct lpfc_iocbq *cmdiocb;
1154
1155         cmdiocb = (struct lpfc_iocbq *) arg;
1156
1157         /* Software abort outstanding PRLI before sending acc */
1158         lpfc_els_abort(phba, ndlp, 1);
1159
1160         lpfc_rcv_logo(phba, ndlp, cmdiocb);
1161         return (ndlp->nlp_state);
1162 }
1163
1164 static uint32_t
1165 lpfc_rcv_padisc_prli_issue(struct lpfc_hba * phba,
1166                            struct lpfc_nodelist * ndlp, void *arg, uint32_t evt)
1167 {
1168         struct lpfc_iocbq *cmdiocb;
1169
1170         cmdiocb = (struct lpfc_iocbq *) arg;
1171
1172         lpfc_rcv_padisc(phba, ndlp, cmdiocb);
1173         return (ndlp->nlp_state);
1174 }
1175
1176 /* This routine is envoked when we rcv a PRLO request from a nport
1177  * we are logged into.  We should send back a PRLO rsp setting the
1178  * appropriate bits.
1179  * NEXT STATE = PRLI_ISSUE
1180  */
1181 static uint32_t
1182 lpfc_rcv_prlo_prli_issue(struct lpfc_hba * phba,
1183                          struct lpfc_nodelist * ndlp, void *arg, uint32_t evt)
1184 {
1185         struct lpfc_iocbq *cmdiocb;
1186
1187         cmdiocb = (struct lpfc_iocbq *) arg;
1188         lpfc_els_rsp_acc(phba, ELS_CMD_ACC, cmdiocb, ndlp, NULL, 0);
1189         return (ndlp->nlp_state);
1190 }
1191
1192 static uint32_t
1193 lpfc_cmpl_prli_prli_issue(struct lpfc_hba * phba,
1194                           struct lpfc_nodelist * ndlp, void *arg, uint32_t evt)
1195 {
1196         struct lpfc_iocbq *cmdiocb, *rspiocb;
1197         IOCB_t *irsp;
1198         PRLI *npr;
1199
1200         cmdiocb = (struct lpfc_iocbq *) arg;
1201         rspiocb = cmdiocb->context_un.rsp_iocb;
1202         npr = (PRLI *)lpfc_check_elscmpl_iocb(phba, cmdiocb, rspiocb);
1203
1204         irsp = &rspiocb->iocb;
1205         if (irsp->ulpStatus) {
1206                 ndlp->nlp_state = NLP_STE_UNMAPPED_NODE;
1207                 lpfc_nlp_list(phba, ndlp, NLP_UNMAPPED_LIST);
1208                 return (ndlp->nlp_state);
1209         }
1210
1211         /* Check out PRLI rsp */
1212         ndlp->nlp_type &= ~(NLP_FCP_TARGET | NLP_FCP_INITIATOR);
1213         ndlp->nlp_fcp_info &= ~NLP_FCP_2_DEVICE;
1214         if ((npr->acceptRspCode == PRLI_REQ_EXECUTED) &&
1215             (npr->prliType == PRLI_FCP_TYPE)) {
1216                 if (npr->initiatorFunc)
1217                         ndlp->nlp_type |= NLP_FCP_INITIATOR;
1218                 if (npr->targetFunc)
1219                         ndlp->nlp_type |= NLP_FCP_TARGET;
1220                 if (npr->Retry)
1221                         ndlp->nlp_fcp_info |= NLP_FCP_2_DEVICE;
1222         }
1223
1224         ndlp->nlp_state = NLP_STE_MAPPED_NODE;
1225         lpfc_nlp_list(phba, ndlp, NLP_MAPPED_LIST);
1226         return (ndlp->nlp_state);
1227 }
1228
1229 /*! lpfc_device_rm_prli_issue
1230   *
1231   * \pre
1232   * \post
1233   * \param   phba
1234   * \param   ndlp
1235   * \param   arg
1236   * \param   evt
1237   * \return  uint32_t
1238   *
1239   * \b Description:
1240   *    This routine is envoked when we a request to remove a nport we are in the
1241   *    process of PRLIing. We should software abort outstanding prli, unreg
1242   *    login, send a logout. We will change node state to UNUSED_NODE, put it
1243   *    on plogi list so it can be freed when LOGO completes.
1244   *
1245   */
1246 static uint32_t
1247 lpfc_device_rm_prli_issue(struct lpfc_hba * phba,
1248                           struct lpfc_nodelist * ndlp, void *arg, uint32_t evt)
1249 {
1250         /* software abort outstanding PRLI */
1251         lpfc_els_abort(phba, ndlp, 1);
1252
1253         lpfc_nlp_list(phba, ndlp, NLP_NO_LIST);
1254         return (NLP_STE_FREED_NODE);
1255 }
1256
1257
1258 /*! lpfc_device_recov_prli_issue
1259   *
1260   * \pre
1261   * \post
1262   * \param   phba
1263   * \param   ndlp
1264   * \param   arg
1265   * \param   evt
1266   * \return  uint32_t
1267   *
1268   * \b Description:
1269   *    The routine is envoked when the state of a device is unknown, like
1270   *    during a link down. We should remove the nodelist entry from the
1271   *    unmapped list, issue a UNREG_LOGIN, do a software abort of the
1272   *    outstanding PRLI command, then free the node entry.
1273   */
1274 static uint32_t
1275 lpfc_device_recov_prli_issue(struct lpfc_hba * phba,
1276                            struct lpfc_nodelist * ndlp, void *arg, uint32_t evt)
1277 {
1278         /* software abort outstanding PRLI */
1279         lpfc_els_abort(phba, ndlp, 1);
1280
1281         ndlp->nlp_state = NLP_STE_NPR_NODE;
1282         lpfc_nlp_list(phba, ndlp, NLP_NPR_LIST);
1283         spin_lock_irq(phba->host->host_lock);
1284         ndlp->nlp_flag &= ~NLP_NPR_2B_DISC;
1285         spin_unlock_irq(phba->host->host_lock);
1286         return (ndlp->nlp_state);
1287 }
1288
1289 static uint32_t
1290 lpfc_rcv_plogi_unmap_node(struct lpfc_hba * phba,
1291                           struct lpfc_nodelist * ndlp, void *arg, uint32_t evt)
1292 {
1293         struct lpfc_iocbq *cmdiocb;
1294
1295         cmdiocb = (struct lpfc_iocbq *) arg;
1296
1297         lpfc_rcv_plogi(phba, ndlp, cmdiocb);
1298         return (ndlp->nlp_state);
1299 }
1300
1301 static uint32_t
1302 lpfc_rcv_prli_unmap_node(struct lpfc_hba * phba,
1303                          struct lpfc_nodelist * ndlp, void *arg, uint32_t evt)
1304 {
1305         struct lpfc_iocbq *cmdiocb;
1306
1307         cmdiocb = (struct lpfc_iocbq *) arg;
1308
1309         lpfc_rcv_prli(phba, ndlp, cmdiocb);
1310         lpfc_els_rsp_prli_acc(phba, cmdiocb, ndlp);
1311         return (ndlp->nlp_state);
1312 }
1313
1314 static uint32_t
1315 lpfc_rcv_logo_unmap_node(struct lpfc_hba * phba,
1316                          struct lpfc_nodelist * ndlp, void *arg, uint32_t evt)
1317 {
1318         struct lpfc_iocbq *cmdiocb;
1319
1320         cmdiocb = (struct lpfc_iocbq *) arg;
1321
1322         lpfc_rcv_logo(phba, ndlp, cmdiocb);
1323         return (ndlp->nlp_state);
1324 }
1325
1326 static uint32_t
1327 lpfc_rcv_padisc_unmap_node(struct lpfc_hba * phba,
1328                            struct lpfc_nodelist * ndlp, void *arg, uint32_t evt)
1329 {
1330         struct lpfc_iocbq *cmdiocb;
1331
1332         cmdiocb = (struct lpfc_iocbq *) arg;
1333
1334         lpfc_rcv_padisc(phba, ndlp, cmdiocb);
1335         return (ndlp->nlp_state);
1336 }
1337
1338 static uint32_t
1339 lpfc_rcv_prlo_unmap_node(struct lpfc_hba * phba,
1340                          struct lpfc_nodelist * ndlp, void *arg, uint32_t evt)
1341 {
1342         struct lpfc_iocbq *cmdiocb;
1343
1344         cmdiocb = (struct lpfc_iocbq *) arg;
1345
1346         /* Treat like rcv logo */
1347         lpfc_rcv_logo(phba, ndlp, cmdiocb);
1348         return (ndlp->nlp_state);
1349 }
1350
1351 static uint32_t
1352 lpfc_device_recov_unmap_node(struct lpfc_hba * phba,
1353                            struct lpfc_nodelist * ndlp, void *arg, uint32_t evt)
1354 {
1355         ndlp->nlp_state = NLP_STE_NPR_NODE;
1356         lpfc_nlp_list(phba, ndlp, NLP_NPR_LIST);
1357         ndlp->nlp_flag &= ~NLP_NPR_2B_DISC;
1358         lpfc_disc_set_adisc(phba, ndlp);
1359
1360         return (ndlp->nlp_state);
1361 }
1362
1363 static uint32_t
1364 lpfc_rcv_plogi_mapped_node(struct lpfc_hba * phba,
1365                            struct lpfc_nodelist * ndlp, void *arg, uint32_t evt)
1366 {
1367         struct lpfc_iocbq *cmdiocb;
1368
1369         cmdiocb = (struct lpfc_iocbq *) arg;
1370
1371         lpfc_rcv_plogi(phba, ndlp, cmdiocb);
1372         return (ndlp->nlp_state);
1373 }
1374
1375 static uint32_t
1376 lpfc_rcv_prli_mapped_node(struct lpfc_hba * phba,
1377                           struct lpfc_nodelist * ndlp, void *arg, uint32_t evt)
1378 {
1379         struct lpfc_iocbq *cmdiocb;
1380
1381         cmdiocb = (struct lpfc_iocbq *) arg;
1382
1383         lpfc_els_rsp_prli_acc(phba, cmdiocb, ndlp);
1384         return (ndlp->nlp_state);
1385 }
1386
1387 static uint32_t
1388 lpfc_rcv_logo_mapped_node(struct lpfc_hba * phba,
1389                           struct lpfc_nodelist * ndlp, void *arg, uint32_t evt)
1390 {
1391         struct lpfc_iocbq *cmdiocb;
1392
1393         cmdiocb = (struct lpfc_iocbq *) arg;
1394
1395         lpfc_rcv_logo(phba, ndlp, cmdiocb);
1396         return (ndlp->nlp_state);
1397 }
1398
1399 static uint32_t
1400 lpfc_rcv_padisc_mapped_node(struct lpfc_hba * phba,
1401                             struct lpfc_nodelist * ndlp, void *arg,
1402                             uint32_t evt)
1403 {
1404         struct lpfc_iocbq *cmdiocb;
1405
1406         cmdiocb = (struct lpfc_iocbq *) arg;
1407
1408         lpfc_rcv_padisc(phba, ndlp, cmdiocb);
1409         return (ndlp->nlp_state);
1410 }
1411
1412 static uint32_t
1413 lpfc_rcv_prlo_mapped_node(struct lpfc_hba * phba,
1414                           struct lpfc_nodelist * ndlp, void *arg, uint32_t evt)
1415 {
1416         struct lpfc_iocbq *cmdiocb;
1417
1418         cmdiocb = (struct lpfc_iocbq *) arg;
1419
1420         /* flush the target */
1421         spin_lock_irq(phba->host->host_lock);
1422         lpfc_sli_abort_iocb(phba, &phba->sli.ring[phba->sli.fcp_ring],
1423                                ndlp->nlp_sid, 0, 0, LPFC_CTX_TGT);
1424         spin_unlock_irq(phba->host->host_lock);
1425
1426         /* Treat like rcv logo */
1427         lpfc_rcv_logo(phba, ndlp, cmdiocb);
1428         return (ndlp->nlp_state);
1429 }
1430
1431 static uint32_t
1432 lpfc_device_recov_mapped_node(struct lpfc_hba * phba,
1433                             struct lpfc_nodelist * ndlp, void *arg,
1434                             uint32_t evt)
1435 {
1436         ndlp->nlp_state = NLP_STE_NPR_NODE;
1437         lpfc_nlp_list(phba, ndlp, NLP_NPR_LIST);
1438         spin_lock_irq(phba->host->host_lock);
1439         ndlp->nlp_flag &= ~NLP_NPR_2B_DISC;
1440         spin_unlock_irq(phba->host->host_lock);
1441         lpfc_disc_set_adisc(phba, ndlp);
1442         return (ndlp->nlp_state);
1443 }
1444
1445 static uint32_t
1446 lpfc_rcv_plogi_npr_node(struct lpfc_hba * phba,
1447                             struct lpfc_nodelist * ndlp, void *arg,
1448                             uint32_t evt)
1449 {
1450         struct lpfc_iocbq *cmdiocb;
1451
1452         cmdiocb = (struct lpfc_iocbq *) arg;
1453
1454         /* Ignore PLOGI if we have an outstanding LOGO */
1455         if (ndlp->nlp_flag & NLP_LOGO_SND) {
1456                 return (ndlp->nlp_state);
1457         }
1458
1459         if (lpfc_rcv_plogi(phba, ndlp, cmdiocb)) {
1460                 spin_lock_irq(phba->host->host_lock);
1461                 ndlp->nlp_flag &= ~(NLP_NPR_ADISC | NLP_NPR_2B_DISC);
1462                 spin_unlock_irq(phba->host->host_lock);
1463                 return (ndlp->nlp_state);
1464         }
1465
1466         /* send PLOGI immediately, move to PLOGI issue state */
1467         if (!(ndlp->nlp_flag & NLP_DELAY_TMO)) {
1468                         ndlp->nlp_state = NLP_STE_PLOGI_ISSUE;
1469                         lpfc_nlp_list(phba, ndlp, NLP_PLOGI_LIST);
1470                         lpfc_issue_els_plogi(phba, ndlp, 0);
1471         }
1472         return (ndlp->nlp_state);
1473 }
1474
1475 static uint32_t
1476 lpfc_rcv_prli_npr_node(struct lpfc_hba * phba,
1477                             struct lpfc_nodelist * ndlp, void *arg,
1478                             uint32_t evt)
1479 {
1480         struct lpfc_iocbq     *cmdiocb;
1481         struct ls_rjt          stat;
1482
1483         cmdiocb = (struct lpfc_iocbq *) arg;
1484
1485         memset(&stat, 0, sizeof (struct ls_rjt));
1486         stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
1487         stat.un.b.lsRjtRsnCodeExp = LSEXP_NOTHING_MORE;
1488         lpfc_els_rsp_reject(phba, stat.un.lsRjtError, cmdiocb, ndlp);
1489
1490         if (!(ndlp->nlp_flag & NLP_DELAY_TMO)) {
1491                 if (ndlp->nlp_flag & NLP_NPR_ADISC) {
1492                         ndlp->nlp_state = NLP_STE_ADISC_ISSUE;
1493                         lpfc_nlp_list(phba, ndlp, NLP_ADISC_LIST);
1494                         lpfc_issue_els_adisc(phba, ndlp, 0);
1495                 } else {
1496                         ndlp->nlp_state = NLP_STE_PLOGI_ISSUE;
1497                         lpfc_nlp_list(phba, ndlp, NLP_PLOGI_LIST);
1498                         lpfc_issue_els_plogi(phba, ndlp, 0);
1499                 }
1500         }
1501         return (ndlp->nlp_state);
1502 }
1503
1504 static uint32_t
1505 lpfc_rcv_logo_npr_node(struct lpfc_hba * phba,
1506                             struct lpfc_nodelist * ndlp, void *arg,
1507                             uint32_t evt)
1508 {
1509         struct lpfc_iocbq     *cmdiocb;
1510
1511         cmdiocb = (struct lpfc_iocbq *) arg;
1512
1513         lpfc_rcv_logo(phba, ndlp, cmdiocb);
1514         return (ndlp->nlp_state);
1515 }
1516
1517 static uint32_t
1518 lpfc_rcv_padisc_npr_node(struct lpfc_hba * phba,
1519                             struct lpfc_nodelist * ndlp, void *arg,
1520                             uint32_t evt)
1521 {
1522         struct lpfc_iocbq     *cmdiocb;
1523
1524         cmdiocb = (struct lpfc_iocbq *) arg;
1525
1526         lpfc_rcv_padisc(phba, ndlp, cmdiocb);
1527
1528         if (!(ndlp->nlp_flag & NLP_DELAY_TMO)) {
1529                 if (ndlp->nlp_flag & NLP_NPR_ADISC) {
1530                         ndlp->nlp_state = NLP_STE_ADISC_ISSUE;
1531                         lpfc_nlp_list(phba, ndlp, NLP_ADISC_LIST);
1532                         lpfc_issue_els_adisc(phba, ndlp, 0);
1533                 } else {
1534                         ndlp->nlp_state = NLP_STE_PLOGI_ISSUE;
1535                         lpfc_nlp_list(phba, ndlp, NLP_PLOGI_LIST);
1536                         lpfc_issue_els_plogi(phba, ndlp, 0);
1537                 }
1538         }
1539         return (ndlp->nlp_state);
1540 }
1541
1542 static uint32_t
1543 lpfc_rcv_prlo_npr_node(struct lpfc_hba * phba,
1544                             struct lpfc_nodelist * ndlp, void *arg,
1545                             uint32_t evt)
1546 {
1547         struct lpfc_iocbq     *cmdiocb;
1548
1549         cmdiocb = (struct lpfc_iocbq *) arg;
1550
1551         lpfc_els_rsp_acc(phba, ELS_CMD_ACC, cmdiocb, ndlp, NULL, 0);
1552
1553         if (ndlp->nlp_flag & NLP_DELAY_TMO) {
1554                 if (ndlp->nlp_last_elscmd == (unsigned long)ELS_CMD_PLOGI) {
1555                         return (ndlp->nlp_state);
1556                 } else {
1557                         spin_lock_irq(phba->host->host_lock);
1558                         ndlp->nlp_flag &= ~NLP_DELAY_TMO;
1559                         spin_unlock_irq(phba->host->host_lock);
1560                         del_timer_sync(&ndlp->nlp_delayfunc);
1561                         if (!list_empty(&ndlp->els_retry_evt.evt_listp))
1562                                 list_del_init(&ndlp->els_retry_evt.evt_listp);
1563                 }
1564         }
1565
1566         ndlp->nlp_state = NLP_STE_PLOGI_ISSUE;
1567         lpfc_nlp_list(phba, ndlp, NLP_PLOGI_LIST);
1568         lpfc_issue_els_plogi(phba, ndlp, 0);
1569         return (ndlp->nlp_state);
1570 }
1571
1572 static uint32_t
1573 lpfc_cmpl_logo_npr_node(struct lpfc_hba * phba,
1574                 struct lpfc_nodelist * ndlp, void *arg, uint32_t evt)
1575 {
1576         lpfc_unreg_rpi(phba, ndlp);
1577         /* This routine does nothing, just return the current state */
1578         return (ndlp->nlp_state);
1579 }
1580
1581 static uint32_t
1582 lpfc_cmpl_reglogin_npr_node(struct lpfc_hba * phba,
1583                             struct lpfc_nodelist * ndlp, void *arg,
1584                             uint32_t evt)
1585 {
1586         LPFC_MBOXQ_t *pmb;
1587         MAILBOX_t *mb;
1588
1589         pmb = (LPFC_MBOXQ_t *) arg;
1590         mb = &pmb->mb;
1591
1592         ndlp->nlp_rpi = mb->un.varWords[0];
1593
1594         return (ndlp->nlp_state);
1595 }
1596
1597 static uint32_t
1598 lpfc_device_rm_npr_node(struct lpfc_hba * phba,
1599                             struct lpfc_nodelist * ndlp, void *arg,
1600                             uint32_t evt)
1601 {
1602         lpfc_nlp_list(phba, ndlp, NLP_NO_LIST);
1603         return (NLP_STE_FREED_NODE);
1604 }
1605
1606 static uint32_t
1607 lpfc_device_recov_npr_node(struct lpfc_hba * phba,
1608                             struct lpfc_nodelist * ndlp, void *arg,
1609                             uint32_t evt)
1610 {
1611         spin_lock_irq(phba->host->host_lock);
1612         ndlp->nlp_flag &= ~NLP_NPR_2B_DISC;
1613         spin_unlock_irq(phba->host->host_lock);
1614         return (ndlp->nlp_state);
1615 }
1616
1617
1618 /* This next section defines the NPort Discovery State Machine */
1619
1620 /* There are 4 different double linked lists nodelist entries can reside on.
1621  * The plogi list and adisc list are used when Link Up discovery or RSCN
1622  * processing is needed. Each list holds the nodes that we will send PLOGI
1623  * or ADISC on. These lists will keep track of what nodes will be effected
1624  * by an RSCN, or a Link Up (Typically, all nodes are effected on Link Up).
1625  * The unmapped_list will contain all nodes that we have successfully logged
1626  * into at the Fibre Channel level. The mapped_list will contain all nodes
1627  * that are mapped FCP targets.
1628  */
1629 /*
1630  * The bind list is a list of undiscovered (potentially non-existent) nodes
1631  * that we have saved binding information on. This information is used when
1632  * nodes transition from the unmapped to the mapped list.
1633  */
1634 /* For UNUSED_NODE state, the node has just been allocated .
1635  * For PLOGI_ISSUE and REG_LOGIN_ISSUE, the node is on
1636  * the PLOGI list. For REG_LOGIN_COMPL, the node is taken off the PLOGI list
1637  * and put on the unmapped list. For ADISC processing, the node is taken off
1638  * the ADISC list and placed on either the mapped or unmapped list (depending
1639  * on its previous state). Once on the unmapped list, a PRLI is issued and the
1640  * state changed to PRLI_ISSUE. When the PRLI completion occurs, the state is
1641  * changed to UNMAPPED_NODE. If the completion indicates a mapped
1642  * node, the node is taken off the unmapped list. The binding list is checked
1643  * for a valid binding, or a binding is automatically assigned. If binding
1644  * assignment is unsuccessful, the node is left on the unmapped list. If
1645  * binding assignment is successful, the associated binding list entry (if
1646  * any) is removed, and the node is placed on the mapped list.
1647  */
1648 /*
1649  * For a Link Down, all nodes on the ADISC, PLOGI, unmapped or mapped
1650  * lists will receive a DEVICE_RECOVERY event. If the linkdown or nodev timers
1651  * expire, all effected nodes will receive a DEVICE_RM event.
1652  */
1653 /*
1654  * For a Link Up or RSCN, all nodes will move from the mapped / unmapped lists
1655  * to either the ADISC or PLOGI list.  After a Nameserver query or ALPA loopmap
1656  * check, additional nodes may be added or removed (via DEVICE_RM) to / from
1657  * the PLOGI or ADISC lists. Once the PLOGI and ADISC lists are populated,
1658  * we will first process the ADISC list.  32 entries are processed initially and
1659  * ADISC is initited for each one.  Completions / Events for each node are
1660  * funnelled thru the state machine.  As each node finishes ADISC processing, it
1661  * starts ADISC for any nodes waiting for ADISC processing. If no nodes are
1662  * waiting, and the ADISC list count is identically 0, then we are done. For
1663  * Link Up discovery, since all nodes on the PLOGI list are UNREG_LOGIN'ed, we
1664  * can issue a CLEAR_LA and reenable Link Events. Next we will process the PLOGI
1665  * list.  32 entries are processed initially and PLOGI is initited for each one.
1666  * Completions / Events for each node are funnelled thru the state machine.  As
1667  * each node finishes PLOGI processing, it starts PLOGI for any nodes waiting
1668  * for PLOGI processing. If no nodes are waiting, and the PLOGI list count is
1669  * indentically 0, then we are done. We have now completed discovery / RSCN
1670  * handling. Upon completion, ALL nodes should be on either the mapped or
1671  * unmapped lists.
1672  */
1673
1674 static uint32_t (*lpfc_disc_action[NLP_STE_MAX_STATE * NLP_EVT_MAX_EVENT])
1675      (struct lpfc_hba *, struct lpfc_nodelist *, void *, uint32_t) = {
1676         /* Action routine                  Event       Current State  */
1677         lpfc_rcv_plogi_unused_node,     /* RCV_PLOGI   UNUSED_NODE    */
1678         lpfc_rcv_els_unused_node,       /* RCV_PRLI        */
1679         lpfc_rcv_logo_unused_node,      /* RCV_LOGO        */
1680         lpfc_rcv_els_unused_node,       /* RCV_ADISC       */
1681         lpfc_rcv_els_unused_node,       /* RCV_PDISC       */
1682         lpfc_rcv_els_unused_node,       /* RCV_PRLO        */
1683         lpfc_disc_illegal,              /* CMPL_PLOGI      */
1684         lpfc_disc_illegal,              /* CMPL_PRLI       */
1685         lpfc_cmpl_logo_unused_node,     /* CMPL_LOGO       */
1686         lpfc_disc_illegal,              /* CMPL_ADISC      */
1687         lpfc_disc_illegal,              /* CMPL_REG_LOGIN  */
1688         lpfc_device_rm_unused_node,     /* DEVICE_RM       */
1689         lpfc_disc_illegal,              /* DEVICE_RECOVERY */
1690
1691         lpfc_rcv_plogi_plogi_issue,     /* RCV_PLOGI   PLOGI_ISSUE    */
1692         lpfc_rcv_els_plogi_issue,       /* RCV_PRLI        */
1693         lpfc_rcv_els_plogi_issue,       /* RCV_LOGO        */
1694         lpfc_rcv_els_plogi_issue,       /* RCV_ADISC       */
1695         lpfc_rcv_els_plogi_issue,       /* RCV_PDISC       */
1696         lpfc_rcv_els_plogi_issue,       /* RCV_PRLO        */
1697         lpfc_cmpl_plogi_plogi_issue,    /* CMPL_PLOGI      */
1698         lpfc_disc_illegal,              /* CMPL_PRLI       */
1699         lpfc_disc_illegal,              /* CMPL_LOGO       */
1700         lpfc_disc_illegal,              /* CMPL_ADISC      */
1701         lpfc_disc_illegal,              /* CMPL_REG_LOGIN  */
1702         lpfc_device_rm_plogi_issue,     /* DEVICE_RM       */
1703         lpfc_device_recov_plogi_issue,  /* DEVICE_RECOVERY */
1704
1705         lpfc_rcv_plogi_adisc_issue,     /* RCV_PLOGI   ADISC_ISSUE    */
1706         lpfc_rcv_prli_adisc_issue,      /* RCV_PRLI        */
1707         lpfc_rcv_logo_adisc_issue,      /* RCV_LOGO        */
1708         lpfc_rcv_padisc_adisc_issue,    /* RCV_ADISC       */
1709         lpfc_rcv_padisc_adisc_issue,    /* RCV_PDISC       */
1710         lpfc_rcv_prlo_adisc_issue,      /* RCV_PRLO        */
1711         lpfc_disc_illegal,              /* CMPL_PLOGI      */
1712         lpfc_disc_illegal,              /* CMPL_PRLI       */
1713         lpfc_disc_illegal,              /* CMPL_LOGO       */
1714         lpfc_cmpl_adisc_adisc_issue,    /* CMPL_ADISC      */
1715         lpfc_disc_illegal,              /* CMPL_REG_LOGIN  */
1716         lpfc_device_rm_adisc_issue,     /* DEVICE_RM       */
1717         lpfc_device_recov_adisc_issue,  /* DEVICE_RECOVERY */
1718
1719         lpfc_rcv_plogi_reglogin_issue,  /* RCV_PLOGI  REG_LOGIN_ISSUE */
1720         lpfc_rcv_prli_reglogin_issue,   /* RCV_PLOGI       */
1721         lpfc_rcv_logo_reglogin_issue,   /* RCV_LOGO        */
1722         lpfc_rcv_padisc_reglogin_issue, /* RCV_ADISC       */
1723         lpfc_rcv_padisc_reglogin_issue, /* RCV_PDISC       */
1724         lpfc_rcv_prlo_reglogin_issue,   /* RCV_PRLO        */
1725         lpfc_disc_illegal,              /* CMPL_PLOGI      */
1726         lpfc_disc_illegal,              /* CMPL_PRLI       */
1727         lpfc_disc_illegal,              /* CMPL_LOGO       */
1728         lpfc_disc_illegal,              /* CMPL_ADISC      */
1729         lpfc_cmpl_reglogin_reglogin_issue,/* CMPL_REG_LOGIN  */
1730         lpfc_device_rm_reglogin_issue,  /* DEVICE_RM       */
1731         lpfc_device_recov_reglogin_issue,/* DEVICE_RECOVERY */
1732
1733         lpfc_rcv_plogi_prli_issue,      /* RCV_PLOGI   PRLI_ISSUE     */
1734         lpfc_rcv_prli_prli_issue,       /* RCV_PRLI        */
1735         lpfc_rcv_logo_prli_issue,       /* RCV_LOGO        */
1736         lpfc_rcv_padisc_prli_issue,     /* RCV_ADISC       */
1737         lpfc_rcv_padisc_prli_issue,     /* RCV_PDISC       */
1738         lpfc_rcv_prlo_prli_issue,       /* RCV_PRLO        */
1739         lpfc_disc_illegal,              /* CMPL_PLOGI      */
1740         lpfc_cmpl_prli_prli_issue,      /* CMPL_PRLI       */
1741         lpfc_disc_illegal,              /* CMPL_LOGO       */
1742         lpfc_disc_illegal,              /* CMPL_ADISC      */
1743         lpfc_disc_illegal,              /* CMPL_REG_LOGIN  */
1744         lpfc_device_rm_prli_issue,      /* DEVICE_RM       */
1745         lpfc_device_recov_prli_issue,   /* DEVICE_RECOVERY */
1746
1747         lpfc_rcv_plogi_unmap_node,      /* RCV_PLOGI   UNMAPPED_NODE  */
1748         lpfc_rcv_prli_unmap_node,       /* RCV_PRLI        */
1749         lpfc_rcv_logo_unmap_node,       /* RCV_LOGO        */
1750         lpfc_rcv_padisc_unmap_node,     /* RCV_ADISC       */
1751         lpfc_rcv_padisc_unmap_node,     /* RCV_PDISC       */
1752         lpfc_rcv_prlo_unmap_node,       /* RCV_PRLO        */
1753         lpfc_disc_illegal,              /* CMPL_PLOGI      */
1754         lpfc_disc_illegal,              /* CMPL_PRLI       */
1755         lpfc_disc_illegal,              /* CMPL_LOGO       */
1756         lpfc_disc_illegal,              /* CMPL_ADISC      */
1757         lpfc_disc_illegal,              /* CMPL_REG_LOGIN  */
1758         lpfc_disc_illegal,              /* DEVICE_RM       */
1759         lpfc_device_recov_unmap_node,   /* DEVICE_RECOVERY */
1760
1761         lpfc_rcv_plogi_mapped_node,     /* RCV_PLOGI   MAPPED_NODE    */
1762         lpfc_rcv_prli_mapped_node,      /* RCV_PRLI        */
1763         lpfc_rcv_logo_mapped_node,      /* RCV_LOGO        */
1764         lpfc_rcv_padisc_mapped_node,    /* RCV_ADISC       */
1765         lpfc_rcv_padisc_mapped_node,    /* RCV_PDISC       */
1766         lpfc_rcv_prlo_mapped_node,      /* RCV_PRLO        */
1767         lpfc_disc_illegal,              /* CMPL_PLOGI      */
1768         lpfc_disc_illegal,              /* CMPL_PRLI       */
1769         lpfc_disc_illegal,              /* CMPL_LOGO       */
1770         lpfc_disc_illegal,              /* CMPL_ADISC      */
1771         lpfc_disc_illegal,              /* CMPL_REG_LOGIN  */
1772         lpfc_disc_illegal,              /* DEVICE_RM       */
1773         lpfc_device_recov_mapped_node,  /* DEVICE_RECOVERY */
1774
1775         lpfc_rcv_plogi_npr_node,        /* RCV_PLOGI   NPR_NODE    */
1776         lpfc_rcv_prli_npr_node,         /* RCV_PRLI        */
1777         lpfc_rcv_logo_npr_node,         /* RCV_LOGO        */
1778         lpfc_rcv_padisc_npr_node,       /* RCV_ADISC       */
1779         lpfc_rcv_padisc_npr_node,       /* RCV_PDISC       */
1780         lpfc_rcv_prlo_npr_node,         /* RCV_PRLO        */
1781         lpfc_disc_noop,                 /* CMPL_PLOGI      */
1782         lpfc_disc_noop,                 /* CMPL_PRLI       */
1783         lpfc_cmpl_logo_npr_node,        /* CMPL_LOGO       */
1784         lpfc_disc_noop,                 /* CMPL_ADISC      */
1785         lpfc_cmpl_reglogin_npr_node,    /* CMPL_REG_LOGIN  */
1786         lpfc_device_rm_npr_node,        /* DEVICE_RM       */
1787         lpfc_device_recov_npr_node,     /* DEVICE_RECOVERY */
1788 };
1789
1790 int
1791 lpfc_disc_state_machine(struct lpfc_hba * phba,
1792                         struct lpfc_nodelist * ndlp, void *arg, uint32_t evt)
1793 {
1794         uint32_t cur_state, rc;
1795         uint32_t(*func) (struct lpfc_hba *, struct lpfc_nodelist *, void *,
1796                          uint32_t);
1797
1798         ndlp->nlp_disc_refcnt++;
1799         cur_state = ndlp->nlp_state;
1800
1801         /* DSM in event <evt> on NPort <nlp_DID> in state <cur_state> */
1802         lpfc_printf_log(phba,
1803                         KERN_INFO,
1804                         LOG_DISCOVERY,
1805                         "%d:0211 DSM in event x%x on NPort x%x in state %d "
1806                         "Data: x%x\n",
1807                         phba->brd_no,
1808                         evt, ndlp->nlp_DID, cur_state, ndlp->nlp_flag);
1809
1810         func = lpfc_disc_action[(cur_state * NLP_EVT_MAX_EVENT) + evt];
1811         rc = (func) (phba, ndlp, arg, evt);
1812
1813         /* DSM out state <rc> on NPort <nlp_DID> */
1814         lpfc_printf_log(phba,
1815                        KERN_INFO,
1816                        LOG_DISCOVERY,
1817                        "%d:0212 DSM out state %d on NPort x%x Data: x%x\n",
1818                        phba->brd_no,
1819                        rc, ndlp->nlp_DID, ndlp->nlp_flag);
1820
1821         ndlp->nlp_disc_refcnt--;
1822
1823         /* Check to see if ndlp removal is deferred */
1824         if ((ndlp->nlp_disc_refcnt == 0)
1825             && (ndlp->nlp_flag & NLP_DELAY_REMOVE)) {
1826                 spin_lock_irq(phba->host->host_lock);
1827                 ndlp->nlp_flag &= ~NLP_DELAY_REMOVE;
1828                 spin_unlock_irq(phba->host->host_lock);
1829                 lpfc_nlp_remove(phba, ndlp);
1830                 return (NLP_STE_FREED_NODE);
1831         }
1832         if (rc == NLP_STE_FREED_NODE)
1833                 return (NLP_STE_FREED_NODE);
1834         ndlp->nlp_state = rc;
1835         return (rc);
1836 }