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) 2004-2006 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 int
  59 lpfc_check_sparm(struct lpfc_hba * phba,
  60                  struct lpfc_nodelist * ndlp, struct serv_parm * sp,
  61                  uint32_t class)
  62 {
  63         volatile struct serv_parm *hsp = &phba->fc_sparam;
  64         uint16_t hsp_value, ssp_value = 0;
  65
  66         /*
  67          * The receive data field size and buffer-to-buffer receive data field
  68          * size entries are 16 bits but are represented as two 8-bit fields in
  69          * the driver data structure to account for rsvd bits and other control
  70          * bits.  Reconstruct and compare the fields as a 16-bit values before
  71          * correcting the byte values.
  72          */
  73         if (sp->cls1.classValid) {
  74                 hsp_value = (hsp->cls1.rcvDataSizeMsb << 8) |
  75                                 hsp->cls1.rcvDataSizeLsb;
  76                 ssp_value = (sp->cls1.rcvDataSizeMsb << 8) |
  77                                 sp->cls1.rcvDataSizeLsb;
  78                 if (ssp_value > hsp_value) {
  79                         sp->cls1.rcvDataSizeLsb = hsp->cls1.rcvDataSizeLsb;
  80                         sp->cls1.rcvDataSizeMsb = hsp->cls1.rcvDataSizeMsb;
  81                 }
  82         } else if (class == CLASS1) {
  83                 return 0;
  84         }
  85
  86         if (sp->cls2.classValid) {
  87                 hsp_value = (hsp->cls2.rcvDataSizeMsb << 8) |
  88                                 hsp->cls2.rcvDataSizeLsb;
  89                 ssp_value = (sp->cls2.rcvDataSizeMsb << 8) |
  90                                 sp->cls2.rcvDataSizeLsb;
  91                 if (ssp_value > hsp_value) {
  92                         sp->cls2.rcvDataSizeLsb = hsp->cls2.rcvDataSizeLsb;
  93                         sp->cls2.rcvDataSizeMsb = hsp->cls2.rcvDataSizeMsb;
  94                 }
  95         } else if (class == CLASS2) {
  96                 return 0;
  97         }
  98
  99         if (sp->cls3.classValid) {
 100                 hsp_value = (hsp->cls3.rcvDataSizeMsb << 8) |
 101                                 hsp->cls3.rcvDataSizeLsb;
 102                 ssp_value = (sp->cls3.rcvDataSizeMsb << 8) |
 103                                 sp->cls3.rcvDataSizeLsb;
 104                 if (ssp_value > hsp_value) {
 105                         sp->cls3.rcvDataSizeLsb = hsp->cls3.rcvDataSizeLsb;
 106                         sp->cls3.rcvDataSizeMsb = hsp->cls3.rcvDataSizeMsb;
 107                 }
 108         } else if (class == CLASS3) {
 109                 return 0;
 110         }
 111
 112         /*
 113          * Preserve the upper four bits of the MSB from the PLOGI response.
 114          * These bits contain the Buffer-to-Buffer State Change Number
 115          * from the target and need to be passed to the FW.
 116          */
 117         hsp_value = (hsp->cmn.bbRcvSizeMsb << 8) | hsp->cmn.bbRcvSizeLsb;
 118         ssp_value = (sp->cmn.bbRcvSizeMsb << 8) | sp->cmn.bbRcvSizeLsb;
 119         if (ssp_value > hsp_value) {
 120                 sp->cmn.bbRcvSizeLsb = hsp->cmn.bbRcvSizeLsb;
 121                 sp->cmn.bbRcvSizeMsb = (sp->cmn.bbRcvSizeMsb & 0xF0) |
 122                                        (hsp->cmn.bbRcvSizeMsb & 0x0F);
 123         }
 124
 125         memcpy(&ndlp->nlp_nodename, &sp->nodeName, sizeof (struct lpfc_name));
 126         memcpy(&ndlp->nlp_portname, &sp->portName, sizeof (struct lpfc_name));
 127         return 1;
 128 }
 129
 130 static void *
 131 lpfc_check_elscmpl_iocb(struct lpfc_hba * phba,
 132                       struct lpfc_iocbq *cmdiocb,
 133                       struct lpfc_iocbq *rspiocb)
 134 {
 135         struct lpfc_dmabuf *pcmd, *prsp;
 136         uint32_t *lp;
 137         void     *ptr = NULL;
 138         IOCB_t   *irsp;
 139
 140         irsp = &rspiocb->iocb;
 141         pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
 142
 143         /* For lpfc_els_abort, context2 could be zero'ed to delay
 144          * freeing associated memory till after ABTS completes.
 145          */
 146         if (pcmd) {
 147                 prsp =  list_get_first(&pcmd->list, struct lpfc_dmabuf,
 148                                        list);
 149                 if (prsp) {
 150                         lp = (uint32_t *) prsp->virt;
 151                         ptr = (void *)((uint8_t *)lp + sizeof(uint32_t));
 152                 }
 153         } else {
 154                 /* Force ulpStatus error since we are returning NULL ptr */
 155                 if (!(irsp->ulpStatus)) {
 156                         irsp->ulpStatus = IOSTAT_LOCAL_REJECT;
 157                         irsp->un.ulpWord[4] = IOERR_SLI_ABORTED;
 158                 }
 159                 ptr = NULL;
 160         }
 161         return ptr;
 162 }
 163
 164
 165 /*
 166  * Free resources / clean up outstanding I/Os
 167  * associated with a LPFC_NODELIST entry. This
 168  * routine effectively results in a "software abort".
 169  */
 170 int
 171 lpfc_els_abort(struct lpfc_hba * phba, struct lpfc_nodelist * ndlp,
 172         int send_abts)
 173 {
 174         struct lpfc_sli *psli;
 175         struct lpfc_sli_ring *pring;
 176         struct lpfc_iocbq *iocb, *next_iocb;
 177         IOCB_t *icmd;
 178         int    found = 0;
 179
 180         /* Abort outstanding I/O on NPort <nlp_DID> */
 181         lpfc_printf_log(phba, KERN_INFO, LOG_DISCOVERY,
 182                         "%d:0205 Abort outstanding I/O on NPort x%x "
 183                         "Data: x%x x%x x%x\n",
 184                         phba->brd_no, ndlp->nlp_DID, ndlp->nlp_flag,
 185                         ndlp->nlp_state, ndlp->nlp_rpi);
 186
 187         psli = &phba->sli;
 188         pring = &psli->ring[LPFC_ELS_RING];
 189
 190         /* First check the txq */
 191         do {
 192                 found = 0;
 193                 spin_lock_irq(phba->host->host_lock);
 194                 list_for_each_entry_safe(iocb, next_iocb, &pring->txq, list) {
 195                         /* Check to see if iocb matches the nport we are looking
 196                            for */
 197                         if ((lpfc_check_sli_ndlp(phba, pring, iocb, ndlp))) {
 198                                 found = 1;
 199                                 /* It matches, so deque and call compl with an
 200                                    error */
 201                                 list_del(&iocb->list);
 202                                 pring->txq_cnt--;
 203                                 if (iocb->iocb_cmpl) {
 204                                         icmd = &iocb->iocb;
 205                                         icmd->ulpStatus = IOSTAT_LOCAL_REJECT;
 206                                         icmd->un.ulpWord[4] = IOERR_SLI_ABORTED;
 207                                         spin_unlock_irq(phba->host->host_lock);
 208                                         (iocb->iocb_cmpl) (phba, iocb, iocb);
 209                                         spin_lock_irq(phba->host->host_lock);
 210                                 } else
 211                                         lpfc_sli_release_iocbq(phba, iocb);
 212                                 break;
 213                         }
 214                 }
 215                 spin_unlock_irq(phba->host->host_lock);
 216         } while (found);
 217
 218         /* Everything on txcmplq will be returned by firmware
 219          * with a no rpi / linkdown / abort error.  For ring 0,
 220          * ELS discovery, we want to get rid of it right here.
 221          */
 222         /* Next check the txcmplq */
 223         do {
 224                 found = 0;
 225                 spin_lock_irq(phba->host->host_lock);
 226                 list_for_each_entry_safe(iocb, next_iocb, &pring->txcmplq,
 227                                          list) {
 228                         /* Check to see if iocb matches the nport we are looking
 229                            for */
 230                         if ((lpfc_check_sli_ndlp (phba, pring, iocb, ndlp))) {
 231                                 found = 1;
 232                                 /* It matches, so deque and call compl with an
 233                                    error */
 234                                 list_del(&iocb->list);
 235                                 pring->txcmplq_cnt--;
 236
 237                                 icmd = &iocb->iocb;
 238                                 /* If the driver is completing an ELS
 239                                  * command early, flush it out of the firmware.
 240                                  */
 241                                 if (send_abts &&
 242                                    (icmd->ulpCommand == CMD_ELS_REQUEST64_CR) &&
 243                                    (icmd->un.elsreq64.bdl.ulpIoTag32)) {
 244                                         lpfc_sli_issue_abort_iotag32(phba,
 245                                                              pring, iocb);
 246                                 }
 247                                 if (iocb->iocb_cmpl) {
 248                                         icmd->ulpStatus = IOSTAT_LOCAL_REJECT;
 249                                         icmd->un.ulpWord[4] = IOERR_SLI_ABORTED;
 250                                         spin_unlock_irq(phba->host->host_lock);
 251                                         (iocb->iocb_cmpl) (phba, iocb, iocb);
 252                                         spin_lock_irq(phba->host->host_lock);
 253                                 } else
 254                                         lpfc_sli_release_iocbq(phba, iocb);
 255                                 break;
 256                         }
 257                 }
 258                 spin_unlock_irq(phba->host->host_lock);
 259         } while(found);
 260
 261         /* If we are delaying issuing an ELS command, cancel it */
 262         if (ndlp->nlp_flag & NLP_DELAY_TMO)
 263                 lpfc_cancel_retry_delay_tmo(phba, ndlp);
 264         return 0;
 265 }
 266
 267 static int
 268 lpfc_rcv_plogi(struct lpfc_hba * phba,
 269                       struct lpfc_nodelist * ndlp,
 270                       struct lpfc_iocbq *cmdiocb)
 271 {
 272         struct lpfc_dmabuf *pcmd;
 273         uint32_t *lp;
 274         IOCB_t *icmd;
 275         struct serv_parm *sp;
 276         LPFC_MBOXQ_t *mbox;
 277         struct ls_rjt stat;
 278         int rc;
 279
 280         memset(&stat, 0, sizeof (struct ls_rjt));
 281         if (phba->hba_state <= LPFC_FLOGI) {
 282                 /* Before responding to PLOGI, check for pt2pt mode.
 283                  * If we are pt2pt, with an outstanding FLOGI, abort
 284                  * the FLOGI and resend it first.
 285                  */
 286                 if (phba->fc_flag & FC_PT2PT) {
 287                         lpfc_els_abort_flogi(phba);
 288                         if (!(phba->fc_flag & FC_PT2PT_PLOGI)) {
 289                                 /* If the other side is supposed to initiate
 290                                  * the PLOGI anyway, just ACC it now and
 291                                  * move on with discovery.
 292                                  */
 293                                 phba->fc_edtov = FF_DEF_EDTOV;
 294                                 phba->fc_ratov = FF_DEF_RATOV;
 295                                 /* Start discovery - this should just do
 296                                    CLEAR_LA */
 297                                 lpfc_disc_start(phba);
 298                         } else {
 299                                 lpfc_initial_flogi(phba);
 300                         }
 301                 } else {
 302                         stat.un.b.lsRjtRsnCode = LSRJT_LOGICAL_BSY;
 303                         stat.un.b.lsRjtRsnCodeExp = LSEXP_NOTHING_MORE;
 304                         lpfc_els_rsp_reject(phba, stat.un.lsRjtError, cmdiocb,
 305                                             ndlp);
 306                         return 0;
 307                 }
 308         }
 309         pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
 310         lp = (uint32_t *) pcmd->virt;
 311         sp = (struct serv_parm *) ((uint8_t *) lp + sizeof (uint32_t));
 312         if ((lpfc_check_sparm(phba, ndlp, sp, CLASS3) == 0)) {
 313                 /* Reject this request because invalid parameters */
 314                 stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
 315                 stat.un.b.lsRjtRsnCodeExp = LSEXP_SPARM_OPTIONS;
 316                 lpfc_els_rsp_reject(phba, stat.un.lsRjtError, cmdiocb, ndlp);
 317                 return 0;
 318         }
 319         icmd = &cmdiocb->iocb;
 320
 321         /* PLOGI chkparm OK */
 322         lpfc_printf_log(phba,
 323                         KERN_INFO,
 324                         LOG_ELS,
 325                         "%d:0114 PLOGI chkparm OK Data: x%x x%x x%x x%x\n",
 326                         phba->brd_no,
 327                         ndlp->nlp_DID, ndlp->nlp_state, ndlp->nlp_flag,
 328                         ndlp->nlp_rpi);
 329
 330         if ((phba->cfg_fcp_class == 2) &&
 331             (sp->cls2.classValid)) {
 332                 ndlp->nlp_fcp_info |= CLASS2;
 333         } else {
 334                 ndlp->nlp_fcp_info |= CLASS3;
 335         }
 336         ndlp->nlp_class_sup = 0;
 337         if (sp->cls1.classValid)
 338                 ndlp->nlp_class_sup |= FC_COS_CLASS1;
 339         if (sp->cls2.classValid)
 340                 ndlp->nlp_class_sup |= FC_COS_CLASS2;
 341         if (sp->cls3.classValid)
 342                 ndlp->nlp_class_sup |= FC_COS_CLASS3;
 343         if (sp->cls4.classValid)
 344                 ndlp->nlp_class_sup |= FC_COS_CLASS4;
 345         ndlp->nlp_maxframe =
 346                 ((sp->cmn.bbRcvSizeMsb & 0x0F) << 8) | sp->cmn.bbRcvSizeLsb;
 347
 348         /* no need to reg_login if we are already in one of these states */
 349         switch (ndlp->nlp_state) {
 350         case  NLP_STE_NPR_NODE:
 351                 if (!(ndlp->nlp_flag & NLP_NPR_ADISC))
 352                         break;
 353         case  NLP_STE_REG_LOGIN_ISSUE:
 354         case  NLP_STE_PRLI_ISSUE:
 355         case  NLP_STE_UNMAPPED_NODE:
 356         case  NLP_STE_MAPPED_NODE:
 357                 lpfc_els_rsp_acc(phba, ELS_CMD_PLOGI, cmdiocb, ndlp, NULL, 0);
 358                 return 1;
 359         }
 360
 361         if ((phba->fc_flag & FC_PT2PT)
 362             && !(phba->fc_flag & FC_PT2PT_PLOGI)) {
 363                 /* rcv'ed PLOGI decides what our NPortId will be */
 364                 phba->fc_myDID = icmd->un.rcvels.parmRo;
 365                 mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
 366                 if (mbox == NULL)
 367                         goto out;
 368                 lpfc_config_link(phba, mbox);
 369                 mbox->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
 370                 rc = lpfc_sli_issue_mbox
 371                         (phba, mbox, (MBX_NOWAIT | MBX_STOP_IOCB));
 372                 if (rc == MBX_NOT_FINISHED) {
 373                         mempool_free( mbox, phba->mbox_mem_pool);
 374                         goto out;
 375                 }
 376
 377                 lpfc_can_disctmo(phba);
 378         }
 379         mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
 380         if (mbox == NULL)
 381                 goto out;
 382
 383         if (lpfc_reg_login(phba, icmd->un.rcvels.remoteID,
 384                            (uint8_t *) sp, mbox, 0)) {
 385                 mempool_free( mbox, phba->mbox_mem_pool);
 386                 goto out;
 387         }
 388
 389         /* ACC PLOGI rsp command needs to execute first,
 390          * queue this mbox command to be processed later.
 391          */
 392         mbox->mbox_cmpl = lpfc_mbx_cmpl_reg_login;
 393         mbox->context2  = ndlp;
 394         ndlp->nlp_flag |= (NLP_ACC_REGLOGIN | NLP_RCV_PLOGI);
 395
 396         /*
 397          * If there is an outstanding PLOGI issued, abort it before
 398          * sending ACC rsp for received PLOGI. If pending plogi
 399          * is not canceled here, the plogi will be rejected by
 400          * remote port and will be retried. On a configuration with
 401          * single discovery thread, this will cause a huge delay in
 402          * discovery. Also this will cause multiple state machines
 403          * running in parallel for this node.
 404          */
 405         if (ndlp->nlp_state == NLP_STE_PLOGI_ISSUE) {
 406                 /* software abort outstanding PLOGI */
 407                 lpfc_els_abort(phba, ndlp, 1);
 408         }
 409
 410         lpfc_els_rsp_acc(phba, ELS_CMD_PLOGI, cmdiocb, ndlp, mbox, 0);
 411         return 1;
 412
 413 out:
 414         stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
 415         stat.un.b.lsRjtRsnCodeExp = LSEXP_OUT_OF_RESOURCE;
 416         lpfc_els_rsp_reject(phba, stat.un.lsRjtError, cmdiocb, ndlp);
 417         return 0;
 418 }
 419
 420 static int
 421 lpfc_rcv_padisc(struct lpfc_hba * phba,
 422                 struct lpfc_nodelist * ndlp,
 423                 struct lpfc_iocbq *cmdiocb)
 424 {
 425         struct lpfc_dmabuf *pcmd;
 426         struct serv_parm *sp;
 427         struct lpfc_name *pnn, *ppn;
 428         struct ls_rjt stat;
 429         ADISC *ap;
 430         IOCB_t *icmd;
 431         uint32_t *lp;
 432         uint32_t cmd;
 433
 434         pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
 435         lp = (uint32_t *) pcmd->virt;
 436
 437         cmd = *lp++;
 438         if (cmd == ELS_CMD_ADISC) {
 439                 ap = (ADISC *) lp;
 440                 pnn = (struct lpfc_name *) & ap->nodeName;
 441                 ppn = (struct lpfc_name *) & ap->portName;
 442         } else {
 443                 sp = (struct serv_parm *) lp;
 444                 pnn = (struct lpfc_name *) & sp->nodeName;
 445                 ppn = (struct lpfc_name *) & sp->portName;
 446         }
 447
 448         icmd = &cmdiocb->iocb;
 449         if ((icmd->ulpStatus == 0) &&
 450             (lpfc_check_adisc(phba, ndlp, pnn, ppn))) {
 451                 if (cmd == ELS_CMD_ADISC) {
 452                         lpfc_els_rsp_adisc_acc(phba, cmdiocb, ndlp);
 453                 } else {
 454                         lpfc_els_rsp_acc(phba, ELS_CMD_PLOGI, cmdiocb, ndlp,
 455                                 NULL, 0);
 456                 }
 457                 return 1;
 458         }
 459         /* Reject this request because invalid parameters */
 460         stat.un.b.lsRjtRsvd0 = 0;
 461         stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
 462         stat.un.b.lsRjtRsnCodeExp = LSEXP_SPARM_OPTIONS;
 463         stat.un.b.vendorUnique = 0;
 464         lpfc_els_rsp_reject(phba, stat.un.lsRjtError, cmdiocb, ndlp);
 465
 466         /* 1 sec timeout */
 467         mod_timer(&ndlp->nlp_delayfunc, jiffies + HZ);
 468
 469         spin_lock_irq(phba->host->host_lock);
 470         ndlp->nlp_flag |= NLP_DELAY_TMO;
 471         spin_unlock_irq(phba->host->host_lock);
 472         ndlp->nlp_last_elscmd = ELS_CMD_PLOGI;
 473         ndlp->nlp_prev_state = ndlp->nlp_state;
 474         ndlp->nlp_state = NLP_STE_NPR_NODE;
 475         lpfc_nlp_list(phba, ndlp, NLP_NPR_LIST);
 476         return 0;
 477 }
 478
 479 static int
 480 lpfc_rcv_logo(struct lpfc_hba * phba,
 481                       struct lpfc_nodelist * ndlp,
 482                       struct lpfc_iocbq *cmdiocb,
 483                       uint32_t els_cmd)
 484 {
 485         /* Put ndlp on NPR list with 1 sec timeout for plogi, ACC logo */
 486         /* Only call LOGO ACC for first LOGO, this avoids sending unnecessary
 487          * PLOGIs during LOGO storms from a device.
 488          */
 489         ndlp->nlp_flag |= NLP_LOGO_ACC;
 490         if (els_cmd == ELS_CMD_PRLO)
 491                 lpfc_els_rsp_acc(phba, ELS_CMD_PRLO, cmdiocb, ndlp, NULL, 0);
 492         else
 493                 lpfc_els_rsp_acc(phba, ELS_CMD_ACC, cmdiocb, ndlp, NULL, 0);
 494
 495         if (!(ndlp->nlp_type & NLP_FABRIC) ||
 496                 (ndlp->nlp_state == NLP_STE_ADISC_ISSUE)) {
 497                 /* Only try to re-login if this is NOT a Fabric Node */
 498                 mod_timer(&ndlp->nlp_delayfunc, jiffies + HZ * 1);
 499                 spin_lock_irq(phba->host->host_lock);
 500                 ndlp->nlp_flag |= NLP_DELAY_TMO;
 501                 spin_unlock_irq(phba->host->host_lock);
 502
 503                 ndlp->nlp_last_elscmd = ELS_CMD_PLOGI;
 504                 ndlp->nlp_prev_state = ndlp->nlp_state;
 505                 ndlp->nlp_state = NLP_STE_NPR_NODE;
 506                 lpfc_nlp_list(phba, ndlp, NLP_NPR_LIST);
 507         } else {
 508                 ndlp->nlp_prev_state = ndlp->nlp_state;
 509                 ndlp->nlp_state = NLP_STE_UNUSED_NODE;
 510                 lpfc_nlp_list(phba, ndlp, NLP_UNUSED_LIST);
 511         }
 512
 513         spin_lock_irq(phba->host->host_lock);
 514         ndlp->nlp_flag &= ~NLP_NPR_ADISC;
 515         spin_unlock_irq(phba->host->host_lock);
 516         /* The driver has to wait until the ACC completes before it continues
 517          * processing the LOGO.  The action will resume in
 518          * lpfc_cmpl_els_logo_acc routine. Since part of processing includes an
 519          * unreg_login, the driver waits so the ACC does not get aborted.
 520          */
 521         return 0;
 522 }
 523
 524 static void
 525 lpfc_rcv_prli(struct lpfc_hba * phba,
 526                       struct lpfc_nodelist * ndlp,
 527                       struct lpfc_iocbq *cmdiocb)
 528 {
 529         struct lpfc_dmabuf *pcmd;
 530         uint32_t *lp;
 531         PRLI *npr;
 532         struct fc_rport *rport = ndlp->rport;
 533         u32 roles;
 534
 535         pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
 536         lp = (uint32_t *) pcmd->virt;
 537         npr = (PRLI *) ((uint8_t *) lp + sizeof (uint32_t));
 538
 539         ndlp->nlp_type &= ~(NLP_FCP_TARGET | NLP_FCP_INITIATOR);
 540         ndlp->nlp_fcp_info &= ~NLP_FCP_2_DEVICE;
 541         if ((npr->acceptRspCode == PRLI_REQ_EXECUTED) &&
 542             (npr->prliType == PRLI_FCP_TYPE)) {
 543                 if (npr->initiatorFunc)
 544                         ndlp->nlp_type |= NLP_FCP_INITIATOR;
 545                 if (npr->targetFunc)
 546                         ndlp->nlp_type |= NLP_FCP_TARGET;
 547                 if (npr->Retry)
 548                         ndlp->nlp_fcp_info |= NLP_FCP_2_DEVICE;
 549         }
 550         if (rport) {
 551                 /* We need to update the rport role values */
 552                 roles = FC_RPORT_ROLE_UNKNOWN;
 553                 if (ndlp->nlp_type & NLP_FCP_INITIATOR)
 554                         roles |= FC_RPORT_ROLE_FCP_INITIATOR;
 555                 if (ndlp->nlp_type & NLP_FCP_TARGET)
 556                         roles |= FC_RPORT_ROLE_FCP_TARGET;
 557                 fc_remote_port_rolechg(rport, roles);
 558         }
 559 }
 560
 561 static uint32_t
 562 lpfc_disc_set_adisc(struct lpfc_hba * phba,
 563                       struct lpfc_nodelist * ndlp)
 564 {
 565         /* Check config parameter use-adisc or FCP-2 */
 566         if ((phba->cfg_use_adisc == 0) &&
 567                 !(phba->fc_flag & FC_RSCN_MODE)) {
 568                 if (!(ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE))
 569                         return 0;
 570         }
 571         spin_lock_irq(phba->host->host_lock);
 572         ndlp->nlp_flag |= NLP_NPR_ADISC;
 573         spin_unlock_irq(phba->host->host_lock);
 574         return 1;
 575 }
 576
 577 static uint32_t
 578 lpfc_disc_illegal(struct lpfc_hba * phba,
 579                    struct lpfc_nodelist * ndlp, void *arg, uint32_t evt)
 580 {
 581         lpfc_printf_log(phba,
 582                         KERN_ERR,
 583                         LOG_DISCOVERY,
 584                         "%d:0253 Illegal State Transition: node x%x event x%x, "
 585                         "state x%x Data: x%x x%x\n",
 586                         phba->brd_no,
 587                         ndlp->nlp_DID, evt, ndlp->nlp_state, ndlp->nlp_rpi,
 588                         ndlp->nlp_flag);
 589         return ndlp->nlp_state;
 590 }
 591
 592 /* Start of Discovery State Machine routines */
 593
 594 static uint32_t
 595 lpfc_rcv_plogi_unused_node(struct lpfc_hba * phba,
 596                            struct lpfc_nodelist * ndlp, void *arg, uint32_t evt)
 597 {
 598         struct lpfc_iocbq *cmdiocb;
 599
 600         cmdiocb = (struct lpfc_iocbq *) arg;
 601
 602         if (lpfc_rcv_plogi(phba, ndlp, cmdiocb)) {
 603                 ndlp->nlp_prev_state = NLP_STE_UNUSED_NODE;
 604                 ndlp->nlp_state = NLP_STE_UNUSED_NODE;
 605                 lpfc_nlp_list(phba, ndlp, NLP_UNUSED_LIST);
 606                 return ndlp->nlp_state;
 607         }
 608         lpfc_nlp_list(phba, ndlp, NLP_NO_LIST);
 609         return NLP_STE_FREED_NODE;
 610 }
 611
 612 static uint32_t
 613 lpfc_rcv_els_unused_node(struct lpfc_hba * phba,
 614                          struct lpfc_nodelist * ndlp, void *arg, uint32_t evt)
 615 {
 616         lpfc_issue_els_logo(phba, ndlp, 0);
 617         lpfc_nlp_list(phba, ndlp, NLP_UNUSED_LIST);
 618         return ndlp->nlp_state;
 619 }
 620
 621 static uint32_t
 622 lpfc_rcv_logo_unused_node(struct lpfc_hba * phba,
 623                           struct lpfc_nodelist * ndlp, void *arg, uint32_t evt)
 624 {
 625         struct lpfc_iocbq     *cmdiocb;
 626
 627         cmdiocb = (struct lpfc_iocbq *) arg;
 628
 629         spin_lock_irq(phba->host->host_lock);
 630         ndlp->nlp_flag |= NLP_LOGO_ACC;
 631         spin_unlock_irq(phba->host->host_lock);
 632         lpfc_els_rsp_acc(phba, ELS_CMD_ACC, cmdiocb, ndlp, NULL, 0);
 633         lpfc_nlp_list(phba, ndlp, NLP_UNUSED_LIST);
 634
 635         return ndlp->nlp_state;
 636 }
 637
 638 static uint32_t
 639 lpfc_cmpl_logo_unused_node(struct lpfc_hba * phba,
 640                           struct lpfc_nodelist * ndlp, void *arg, uint32_t evt)
 641 {
 642         lpfc_nlp_list(phba, ndlp, NLP_NO_LIST);
 643         return NLP_STE_FREED_NODE;
 644 }
 645
 646 static uint32_t
 647 lpfc_device_rm_unused_node(struct lpfc_hba * phba,
 648                            struct lpfc_nodelist * ndlp, void *arg, uint32_t evt)
 649 {
 650         lpfc_nlp_list(phba, ndlp, NLP_NO_LIST);
 651         return NLP_STE_FREED_NODE;
 652 }
 653
 654 static uint32_t
 655 lpfc_rcv_plogi_plogi_issue(struct lpfc_hba * phba, struct lpfc_nodelist * ndlp,
 656                            void *arg, uint32_t evt)
 657 {
 658         struct lpfc_iocbq *cmdiocb = arg;
 659         struct lpfc_dmabuf *pcmd;
 660         struct serv_parm *sp;
 661         uint32_t *lp;
 662         struct ls_rjt stat;
 663         int port_cmp;
 664
 665         pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
 666         lp = (uint32_t *) pcmd->virt;
 667         sp = (struct serv_parm *) ((uint8_t *) lp + sizeof (uint32_t));
 668
 669         memset(&stat, 0, sizeof (struct ls_rjt));
 670
 671         /* For a PLOGI, we only accept if our portname is less
 672          * than the remote portname.
 673          */
 674         phba->fc_stat.elsLogiCol++;
 675         port_cmp = memcmp(&phba->fc_portname, &sp->portName,
 676                           sizeof (struct lpfc_name));
 677
 678         if (port_cmp >= 0) {
 679                 /* Reject this request because the remote node will accept
 680                    ours */
 681                 stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
 682                 stat.un.b.lsRjtRsnCodeExp = LSEXP_CMD_IN_PROGRESS;
 683                 lpfc_els_rsp_reject(phba, stat.un.lsRjtError, cmdiocb, ndlp);
 684         } else {
 685                 lpfc_rcv_plogi(phba, ndlp, cmdiocb);
 686         } /* if our portname was less */
 687
 688         return ndlp->nlp_state;
 689 }
 690
 691 static uint32_t
 692 lpfc_rcv_logo_plogi_issue(struct lpfc_hba * phba,
 693                           struct lpfc_nodelist * ndlp, void *arg, uint32_t evt)
 694 {
 695         struct lpfc_iocbq     *cmdiocb;
 696
 697         cmdiocb = (struct lpfc_iocbq *) arg;
 698
 699         /* software abort outstanding PLOGI */
 700         lpfc_els_abort(phba, ndlp, 1);
 701
 702         lpfc_rcv_logo(phba, ndlp, cmdiocb, ELS_CMD_LOGO);
 703         return ndlp->nlp_state;
 704 }
 705
 706 static uint32_t
 707 lpfc_rcv_els_plogi_issue(struct lpfc_hba * phba,
 708                           struct lpfc_nodelist * ndlp, void *arg, uint32_t evt)
 709 {
 710         struct lpfc_iocbq     *cmdiocb;
 711
 712         cmdiocb = (struct lpfc_iocbq *) arg;
 713
 714         /* software abort outstanding PLOGI */
 715         lpfc_els_abort(phba, ndlp, 1);
 716
 717         if (evt == NLP_EVT_RCV_LOGO) {
 718                 lpfc_els_rsp_acc(phba, ELS_CMD_ACC, cmdiocb, ndlp, NULL, 0);
 719         } else {
 720                 lpfc_issue_els_logo(phba, ndlp, 0);
 721         }
 722
 723         /* Put ndlp in npr list set plogi timer for 1 sec */
 724         mod_timer(&ndlp->nlp_delayfunc, jiffies + HZ * 1);
 725         spin_lock_irq(phba->host->host_lock);
 726         ndlp->nlp_flag |= NLP_DELAY_TMO;
 727         spin_unlock_irq(phba->host->host_lock);
 728         ndlp->nlp_last_elscmd = ELS_CMD_PLOGI;
 729         ndlp->nlp_prev_state = NLP_STE_PLOGI_ISSUE;
 730         ndlp->nlp_state = NLP_STE_NPR_NODE;
 731         lpfc_nlp_list(phba, ndlp, NLP_NPR_LIST);
 732
 733         return ndlp->nlp_state;
 734 }
 735
 736 static uint32_t
 737 lpfc_cmpl_plogi_plogi_issue(struct lpfc_hba * phba,
 738                             struct lpfc_nodelist * ndlp, void *arg,
 739                             uint32_t evt)
 740 {
 741         struct lpfc_iocbq *cmdiocb, *rspiocb;
 742         struct lpfc_dmabuf *pcmd, *prsp;
 743         uint32_t *lp;
 744         IOCB_t *irsp;
 745         struct serv_parm *sp;
 746         LPFC_MBOXQ_t *mbox;
 747
 748         cmdiocb = (struct lpfc_iocbq *) arg;
 749         rspiocb = cmdiocb->context_un.rsp_iocb;
 750
 751         if (ndlp->nlp_flag & NLP_ACC_REGLOGIN) {
 752                 /* Recovery from PLOGI collision logic */
 753                 return ndlp->nlp_state;
 754         }
 755
 756         irsp = &rspiocb->iocb;
 757
 758         if (irsp->ulpStatus)
 759                 goto out;
 760
 761         pcmd = (struct lpfc_dmabuf *) cmdiocb->context2;
 762
 763         prsp = list_get_first(&pcmd->list,
 764                               struct lpfc_dmabuf,
 765                               list);
 766         lp = (uint32_t *) prsp->virt;
 767
 768         sp = (struct serv_parm *) ((uint8_t *) lp + sizeof (uint32_t));
 769         if (!lpfc_check_sparm(phba, ndlp, sp, CLASS3))
 770                 goto out;
 771
 772         /* PLOGI chkparm OK */
 773         lpfc_printf_log(phba,
 774                         KERN_INFO,
 775                         LOG_ELS,
 776                         "%d:0121 PLOGI chkparm OK "
 777                         "Data: x%x x%x x%x x%x\n",
 778                         phba->brd_no,
 779                         ndlp->nlp_DID, ndlp->nlp_state,
 780                         ndlp->nlp_flag, ndlp->nlp_rpi);
 781
 782         if ((phba->cfg_fcp_class == 2) &&
 783             (sp->cls2.classValid)) {
 784                 ndlp->nlp_fcp_info |= CLASS2;
 785         } else {
 786                 ndlp->nlp_fcp_info |= CLASS3;
 787         }
 788         ndlp->nlp_class_sup = 0;
 789         if (sp->cls1.classValid)
 790                 ndlp->nlp_class_sup |= FC_COS_CLASS1;
 791         if (sp->cls2.classValid)
 792                 ndlp->nlp_class_sup |= FC_COS_CLASS2;
 793         if (sp->cls3.classValid)
 794                 ndlp->nlp_class_sup |= FC_COS_CLASS3;
 795         if (sp->cls4.classValid)
 796                 ndlp->nlp_class_sup |= FC_COS_CLASS4;
 797         ndlp->nlp_maxframe =
 798                 ((sp->cmn.bbRcvSizeMsb & 0x0F) << 8) |
 799                 sp->cmn.bbRcvSizeLsb;
 800
 801         if (!(mbox = mempool_alloc(phba->mbox_mem_pool,
 802                                    GFP_KERNEL)))
 803                 goto out;
 804
 805         lpfc_unreg_rpi(phba, ndlp);
 806         if (lpfc_reg_login
 807             (phba, irsp->un.elsreq64.remoteID,
 808              (uint8_t *) sp, mbox, 0) == 0) {
 809                 switch (ndlp->nlp_DID) {
 810                 case NameServer_DID:
 811                         mbox->mbox_cmpl =
 812                                 lpfc_mbx_cmpl_ns_reg_login;
 813                         break;
 814                 case FDMI_DID:
 815                         mbox->mbox_cmpl =
 816                                 lpfc_mbx_cmpl_fdmi_reg_login;
 817                         break;
 818                 default:
 819                         mbox->mbox_cmpl =
 820                                 lpfc_mbx_cmpl_reg_login;
 821                 }
 822                 mbox->context2 = ndlp;
 823                 if (lpfc_sli_issue_mbox(phba, mbox,
 824                                         (MBX_NOWAIT | MBX_STOP_IOCB))
 825                     != MBX_NOT_FINISHED) {
 826                         ndlp->nlp_state =
 827                                 NLP_STE_REG_LOGIN_ISSUE;
 828                         lpfc_nlp_list(phba, ndlp,
 829                                       NLP_REGLOGIN_LIST);
 830                         return ndlp->nlp_state;
 831                 }
 832                 mempool_free(mbox, phba->mbox_mem_pool);
 833         } else {
 834                 mempool_free(mbox, phba->mbox_mem_pool);
 835         }
 836
 837
 838  out:
 839         /* Free this node since the driver cannot login or has the wrong
 840            sparm */
 841         lpfc_nlp_list(phba, ndlp, NLP_NO_LIST);
 842         return NLP_STE_FREED_NODE;
 843 }
 844
 845 static uint32_t
 846 lpfc_device_rm_plogi_issue(struct lpfc_hba * phba,
 847                            struct lpfc_nodelist * ndlp, void *arg, uint32_t evt)
 848 {
 849         if(ndlp->nlp_flag & NLP_NPR_2B_DISC) {
 850                 ndlp->nlp_flag |= NLP_NODEV_REMOVE;
 851                 return ndlp->nlp_state;
 852         }
 853         else {
 854                 /* software abort outstanding PLOGI */
 855                 lpfc_els_abort(phba, ndlp, 1);
 856
 857                 lpfc_nlp_list(phba, ndlp, NLP_NO_LIST);
 858                 return NLP_STE_FREED_NODE;
 859         }
 860 }
 861
 862 static uint32_t
 863 lpfc_device_recov_plogi_issue(struct lpfc_hba * phba,
 864                             struct lpfc_nodelist * ndlp, void *arg,
 865                             uint32_t evt)
 866 {
 867         /* software abort outstanding PLOGI */
 868         lpfc_els_abort(phba, ndlp, 1);
 869
 870         ndlp->nlp_prev_state = NLP_STE_PLOGI_ISSUE;
 871         ndlp->nlp_state = NLP_STE_NPR_NODE;
 872         lpfc_nlp_list(phba, ndlp, NLP_NPR_LIST);
 873         spin_lock_irq(phba->host->host_lock);
 874         ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
 875         spin_unlock_irq(phba->host->host_lock);
 876
 877         return ndlp->nlp_state;
 878 }
 879
 880 static uint32_t
 881 lpfc_rcv_plogi_adisc_issue(struct lpfc_hba * phba,
 882                             struct lpfc_nodelist * ndlp, void *arg,
 883                             uint32_t evt)
 884 {
 885         struct lpfc_iocbq *cmdiocb;
 886
 887         /* software abort outstanding ADISC */
 888         lpfc_els_abort(phba, ndlp, 1);
 889
 890         cmdiocb = (struct lpfc_iocbq *) arg;
 891
 892         if (lpfc_rcv_plogi(phba, ndlp, cmdiocb)) {
 893                 return ndlp->nlp_state;
 894         }
 895         ndlp->nlp_prev_state = NLP_STE_ADISC_ISSUE;
 896         ndlp->nlp_state = NLP_STE_PLOGI_ISSUE;
 897         lpfc_nlp_list(phba, ndlp, NLP_PLOGI_LIST);
 898         lpfc_issue_els_plogi(phba, ndlp->nlp_DID, 0);
 899
 900         return ndlp->nlp_state;
 901 }
 902
 903 static uint32_t
 904 lpfc_rcv_prli_adisc_issue(struct lpfc_hba * phba,
 905                             struct lpfc_nodelist * ndlp, void *arg,
 906                             uint32_t evt)
 907 {
 908         struct lpfc_iocbq *cmdiocb;
 909
 910         cmdiocb = (struct lpfc_iocbq *) arg;
 911
 912         lpfc_els_rsp_prli_acc(phba, cmdiocb, ndlp);
 913         return ndlp->nlp_state;
 914 }
 915
 916 static uint32_t
 917 lpfc_rcv_logo_adisc_issue(struct lpfc_hba * phba,
 918                             struct lpfc_nodelist * ndlp, void *arg,
 919                             uint32_t evt)
 920 {
 921         struct lpfc_iocbq *cmdiocb;
 922
 923         cmdiocb = (struct lpfc_iocbq *) arg;
 924
 925         /* software abort outstanding ADISC */
 926         lpfc_els_abort(phba, ndlp, 0);
 927
 928         lpfc_rcv_logo(phba, ndlp, cmdiocb, ELS_CMD_LOGO);
 929         return ndlp->nlp_state;
 930 }
 931
 932 static uint32_t
 933 lpfc_rcv_padisc_adisc_issue(struct lpfc_hba * phba,
 934                             struct lpfc_nodelist * ndlp, void *arg,
 935                             uint32_t evt)
 936 {
 937         struct lpfc_iocbq *cmdiocb;
 938
 939         cmdiocb = (struct lpfc_iocbq *) arg;
 940
 941         lpfc_rcv_padisc(phba, ndlp, cmdiocb);
 942         return ndlp->nlp_state;
 943 }
 944
 945 static uint32_t
 946 lpfc_rcv_prlo_adisc_issue(struct lpfc_hba * phba,
 947                             struct lpfc_nodelist * ndlp, void *arg,
 948                             uint32_t evt)
 949 {
 950         struct lpfc_iocbq *cmdiocb;
 951
 952         cmdiocb = (struct lpfc_iocbq *) arg;
 953
 954         /* Treat like rcv logo */
 955         lpfc_rcv_logo(phba, ndlp, cmdiocb, ELS_CMD_PRLO);
 956         return ndlp->nlp_state;
 957 }
 958
 959 static uint32_t
 960 lpfc_cmpl_adisc_adisc_issue(struct lpfc_hba * phba,
 961                             struct lpfc_nodelist * ndlp, void *arg,
 962                             uint32_t evt)
 963 {
 964         struct lpfc_iocbq *cmdiocb, *rspiocb;
 965         IOCB_t *irsp;
 966         ADISC *ap;
 967
 968         cmdiocb = (struct lpfc_iocbq *) arg;
 969         rspiocb = cmdiocb->context_un.rsp_iocb;
 970
 971         ap = (ADISC *)lpfc_check_elscmpl_iocb(phba, cmdiocb, rspiocb);
 972         irsp = &rspiocb->iocb;
 973
 974         if ((irsp->ulpStatus) ||
 975                 (!lpfc_check_adisc(phba, ndlp, &ap->nodeName, &ap->portName))) {
 976                 /* 1 sec timeout */
 977                 mod_timer(&ndlp->nlp_delayfunc, jiffies + HZ);
 978                 spin_lock_irq(phba->host->host_lock);
 979                 ndlp->nlp_flag |= NLP_DELAY_TMO;
 980                 spin_unlock_irq(phba->host->host_lock);
 981                 ndlp->nlp_last_elscmd = ELS_CMD_PLOGI;
 982
 983                 memset(&ndlp->nlp_nodename, 0, sizeof (struct lpfc_name));
 984                 memset(&ndlp->nlp_portname, 0, sizeof (struct lpfc_name));
 985
 986                 ndlp->nlp_prev_state = NLP_STE_ADISC_ISSUE;
 987                 ndlp->nlp_state = NLP_STE_NPR_NODE;
 988                 lpfc_nlp_list(phba, ndlp, NLP_NPR_LIST);
 989                 lpfc_unreg_rpi(phba, ndlp);
 990                 return ndlp->nlp_state;
 991         }
 992
 993         if (ndlp->nlp_type & NLP_FCP_TARGET) {
 994                 ndlp->nlp_prev_state = NLP_STE_ADISC_ISSUE;
 995                 ndlp->nlp_state = NLP_STE_MAPPED_NODE;
 996                 lpfc_nlp_list(phba, ndlp, NLP_MAPPED_LIST);
 997         } else {
 998                 ndlp->nlp_prev_state = NLP_STE_ADISC_ISSUE;
 999                 ndlp->nlp_state = NLP_STE_UNMAPPED_NODE;
1000                 lpfc_nlp_list(phba, ndlp, NLP_UNMAPPED_LIST);
1001         }
1002         return ndlp->nlp_state;
1003 }
1004
1005 static uint32_t
1006 lpfc_device_rm_adisc_issue(struct lpfc_hba * phba,
1007                             struct lpfc_nodelist * ndlp, void *arg,
1008                             uint32_t evt)
1009 {
1010         if(ndlp->nlp_flag & NLP_NPR_2B_DISC) {
1011                 ndlp->nlp_flag |= NLP_NODEV_REMOVE;
1012                 return ndlp->nlp_state;
1013         }
1014         else {
1015                 /* software abort outstanding ADISC */
1016                 lpfc_els_abort(phba, ndlp, 1);
1017
1018                 lpfc_nlp_list(phba, ndlp, NLP_NO_LIST);
1019                 return NLP_STE_FREED_NODE;
1020         }
1021 }
1022
1023 static uint32_t
1024 lpfc_device_recov_adisc_issue(struct lpfc_hba * phba,
1025                             struct lpfc_nodelist * ndlp, void *arg,
1026                             uint32_t evt)
1027 {
1028         /* software abort outstanding ADISC */
1029         lpfc_els_abort(phba, ndlp, 1);
1030
1031         ndlp->nlp_prev_state = NLP_STE_ADISC_ISSUE;
1032         ndlp->nlp_state = NLP_STE_NPR_NODE;
1033         lpfc_nlp_list(phba, ndlp, NLP_NPR_LIST);
1034         spin_lock_irq(phba->host->host_lock);
1035         ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
1036         ndlp->nlp_flag |= NLP_NPR_ADISC;
1037         spin_unlock_irq(phba->host->host_lock);
1038
1039         return ndlp->nlp_state;
1040 }
1041
1042 static uint32_t
1043 lpfc_rcv_plogi_reglogin_issue(struct lpfc_hba * phba,
1044                               struct lpfc_nodelist * ndlp, void *arg,
1045                               uint32_t evt)
1046 {
1047         struct lpfc_iocbq *cmdiocb;
1048
1049         cmdiocb = (struct lpfc_iocbq *) arg;
1050
1051         lpfc_rcv_plogi(phba, ndlp, cmdiocb);
1052         return ndlp->nlp_state;
1053 }
1054
1055 static uint32_t
1056 lpfc_rcv_prli_reglogin_issue(struct lpfc_hba * phba,
1057                              struct lpfc_nodelist * ndlp, void *arg,
1058                              uint32_t evt)
1059 {
1060         struct lpfc_iocbq *cmdiocb;
1061
1062         cmdiocb = (struct lpfc_iocbq *) arg;
1063
1064         lpfc_els_rsp_prli_acc(phba, cmdiocb, ndlp);
1065         return ndlp->nlp_state;
1066 }
1067
1068 static uint32_t
1069 lpfc_rcv_logo_reglogin_issue(struct lpfc_hba * phba,
1070                              struct lpfc_nodelist * ndlp, void *arg,
1071                              uint32_t evt)
1072 {
1073         struct lpfc_iocbq *cmdiocb;
1074
1075         cmdiocb = (struct lpfc_iocbq *) arg;
1076
1077         lpfc_rcv_logo(phba, ndlp, cmdiocb, ELS_CMD_LOGO);
1078         return ndlp->nlp_state;
1079 }
1080
1081 static uint32_t
1082 lpfc_rcv_padisc_reglogin_issue(struct lpfc_hba * phba,
1083                                struct lpfc_nodelist * ndlp, void *arg,
1084                                uint32_t evt)
1085 {
1086         struct lpfc_iocbq *cmdiocb;
1087
1088         cmdiocb = (struct lpfc_iocbq *) arg;
1089
1090         lpfc_rcv_padisc(phba, ndlp, cmdiocb);
1091         return ndlp->nlp_state;
1092 }
1093
1094 static uint32_t
1095 lpfc_rcv_prlo_reglogin_issue(struct lpfc_hba * phba,
1096                              struct lpfc_nodelist * ndlp, void *arg,
1097                              uint32_t evt)
1098 {
1099         struct lpfc_iocbq *cmdiocb;
1100
1101         cmdiocb = (struct lpfc_iocbq *) arg;
1102         lpfc_els_rsp_acc(phba, ELS_CMD_PRLO, cmdiocb, ndlp, NULL, 0);
1103         return ndlp->nlp_state;
1104 }
1105
1106 static uint32_t
1107 lpfc_cmpl_reglogin_reglogin_issue(struct lpfc_hba * phba,
1108                                   struct lpfc_nodelist * ndlp,
1109                                   void *arg, uint32_t evt)
1110 {
1111         LPFC_MBOXQ_t *pmb;
1112         MAILBOX_t *mb;
1113         uint32_t did;
1114
1115         pmb = (LPFC_MBOXQ_t *) arg;
1116         mb = &pmb->mb;
1117         did = mb->un.varWords[1];
1118         if (mb->mbxStatus) {
1119                 /* RegLogin failed */
1120                 lpfc_printf_log(phba,
1121                                 KERN_ERR,
1122                                 LOG_DISCOVERY,
1123                                 "%d:0246 RegLogin failed Data: x%x x%x x%x\n",
1124                                 phba->brd_no,
1125                                 did, mb->mbxStatus, phba->hba_state);
1126
1127                 /*
1128                  * If RegLogin failed due to lack of HBA resources do not
1129                  * retry discovery.
1130                  */
1131                 if (mb->mbxStatus == MBXERR_RPI_FULL) {
1132                         ndlp->nlp_prev_state = NLP_STE_UNUSED_NODE;
1133                         ndlp->nlp_state = NLP_STE_UNUSED_NODE;
1134                         lpfc_nlp_list(phba, ndlp, NLP_UNUSED_LIST);
1135                         return ndlp->nlp_state;
1136                 }
1137
1138                 /* Put ndlp in npr list set plogi timer for 1 sec */
1139                 mod_timer(&ndlp->nlp_delayfunc, jiffies + HZ * 1);
1140                 spin_lock_irq(phba->host->host_lock);
1141                 ndlp->nlp_flag |= NLP_DELAY_TMO;
1142                 spin_unlock_irq(phba->host->host_lock);
1143                 ndlp->nlp_last_elscmd = ELS_CMD_PLOGI;
1144
1145                 lpfc_issue_els_logo(phba, ndlp, 0);
1146                 ndlp->nlp_prev_state = NLP_STE_REG_LOGIN_ISSUE;
1147                 ndlp->nlp_state = NLP_STE_NPR_NODE;
1148                 lpfc_nlp_list(phba, ndlp, NLP_NPR_LIST);
1149                 return ndlp->nlp_state;
1150         }
1151
1152         ndlp->nlp_rpi = mb->un.varWords[0];
1153
1154         /* Only if we are not a fabric nport do we issue PRLI */
1155         if (!(ndlp->nlp_type & NLP_FABRIC)) {
1156                 ndlp->nlp_prev_state = NLP_STE_REG_LOGIN_ISSUE;
1157                 ndlp->nlp_state = NLP_STE_PRLI_ISSUE;
1158                 lpfc_nlp_list(phba, ndlp, NLP_PRLI_LIST);
1159                 lpfc_issue_els_prli(phba, ndlp, 0);
1160         } else {
1161                 ndlp->nlp_prev_state = NLP_STE_REG_LOGIN_ISSUE;
1162                 ndlp->nlp_state = NLP_STE_UNMAPPED_NODE;
1163                 lpfc_nlp_list(phba, ndlp, NLP_UNMAPPED_LIST);
1164         }
1165         return ndlp->nlp_state;
1166 }
1167
1168 static uint32_t
1169 lpfc_device_rm_reglogin_issue(struct lpfc_hba * phba,
1170                               struct lpfc_nodelist * ndlp, void *arg,
1171                               uint32_t evt)
1172 {
1173         if(ndlp->nlp_flag & NLP_NPR_2B_DISC) {
1174                 ndlp->nlp_flag |= NLP_NODEV_REMOVE;
1175                 return ndlp->nlp_state;
1176         }
1177         else {
1178                 lpfc_nlp_list(phba, ndlp, NLP_NO_LIST);
1179                 return NLP_STE_FREED_NODE;
1180         }
1181 }
1182
1183 static uint32_t
1184 lpfc_device_recov_reglogin_issue(struct lpfc_hba * phba,
1185                                struct lpfc_nodelist * ndlp, void *arg,
1186                                uint32_t evt)
1187 {
1188         ndlp->nlp_prev_state = NLP_STE_REG_LOGIN_ISSUE;
1189         ndlp->nlp_state = NLP_STE_NPR_NODE;
1190         lpfc_nlp_list(phba, ndlp, NLP_NPR_LIST);
1191         spin_lock_irq(phba->host->host_lock);
1192         ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
1193         spin_unlock_irq(phba->host->host_lock);
1194         return ndlp->nlp_state;
1195 }
1196
1197 static uint32_t
1198 lpfc_rcv_plogi_prli_issue(struct lpfc_hba * phba,
1199                           struct lpfc_nodelist * ndlp, void *arg, uint32_t evt)
1200 {
1201         struct lpfc_iocbq *cmdiocb;
1202
1203         cmdiocb = (struct lpfc_iocbq *) arg;
1204
1205         lpfc_rcv_plogi(phba, ndlp, cmdiocb);
1206         return ndlp->nlp_state;
1207 }
1208
1209 static uint32_t
1210 lpfc_rcv_prli_prli_issue(struct lpfc_hba * phba,
1211                          struct lpfc_nodelist * ndlp, void *arg, uint32_t evt)
1212 {
1213         struct lpfc_iocbq *cmdiocb;
1214
1215         cmdiocb = (struct lpfc_iocbq *) arg;
1216
1217         lpfc_els_rsp_prli_acc(phba, cmdiocb, ndlp);
1218         return ndlp->nlp_state;
1219 }
1220
1221 static uint32_t
1222 lpfc_rcv_logo_prli_issue(struct lpfc_hba * phba,
1223                          struct lpfc_nodelist * ndlp, void *arg, uint32_t evt)
1224 {
1225         struct lpfc_iocbq *cmdiocb;
1226
1227         cmdiocb = (struct lpfc_iocbq *) arg;
1228
1229         /* Software abort outstanding PRLI before sending acc */
1230         lpfc_els_abort(phba, ndlp, 1);
1231
1232         lpfc_rcv_logo(phba, ndlp, cmdiocb, ELS_CMD_LOGO);
1233         return ndlp->nlp_state;
1234 }
1235
1236 static uint32_t
1237 lpfc_rcv_padisc_prli_issue(struct lpfc_hba * phba,
1238                            struct lpfc_nodelist * ndlp, void *arg, uint32_t evt)
1239 {
1240         struct lpfc_iocbq *cmdiocb;
1241
1242         cmdiocb = (struct lpfc_iocbq *) arg;
1243
1244         lpfc_rcv_padisc(phba, ndlp, cmdiocb);
1245         return ndlp->nlp_state;
1246 }
1247
1248 /* This routine is envoked when we rcv a PRLO request from a nport
1249  * we are logged into.  We should send back a PRLO rsp setting the
1250  * appropriate bits.
1251  * NEXT STATE = PRLI_ISSUE
1252  */
1253 static uint32_t
1254 lpfc_rcv_prlo_prli_issue(struct lpfc_hba * phba,
1255                          struct lpfc_nodelist * ndlp, void *arg, uint32_t evt)
1256 {
1257         struct lpfc_iocbq *cmdiocb;
1258
1259         cmdiocb = (struct lpfc_iocbq *) arg;
1260         lpfc_els_rsp_acc(phba, ELS_CMD_PRLO, cmdiocb, ndlp, NULL, 0);
1261         return ndlp->nlp_state;
1262 }
1263
1264 static uint32_t
1265 lpfc_cmpl_prli_prli_issue(struct lpfc_hba * phba,
1266                           struct lpfc_nodelist * ndlp, void *arg, uint32_t evt)
1267 {
1268         struct lpfc_iocbq *cmdiocb, *rspiocb;
1269         IOCB_t *irsp;
1270         PRLI *npr;
1271
1272         cmdiocb = (struct lpfc_iocbq *) arg;
1273         rspiocb = cmdiocb->context_un.rsp_iocb;
1274         npr = (PRLI *)lpfc_check_elscmpl_iocb(phba, cmdiocb, rspiocb);
1275
1276         irsp = &rspiocb->iocb;
1277         if (irsp->ulpStatus) {
1278                 ndlp->nlp_prev_state = NLP_STE_PRLI_ISSUE;
1279                 ndlp->nlp_state = NLP_STE_UNMAPPED_NODE;
1280                 lpfc_nlp_list(phba, ndlp, NLP_UNMAPPED_LIST);
1281                 return ndlp->nlp_state;
1282         }
1283
1284         /* Check out PRLI rsp */
1285         ndlp->nlp_type &= ~(NLP_FCP_TARGET | NLP_FCP_INITIATOR);
1286         ndlp->nlp_fcp_info &= ~NLP_FCP_2_DEVICE;
1287         if ((npr->acceptRspCode == PRLI_REQ_EXECUTED) &&
1288             (npr->prliType == PRLI_FCP_TYPE)) {
1289                 if (npr->initiatorFunc)
1290                         ndlp->nlp_type |= NLP_FCP_INITIATOR;
1291                 if (npr->targetFunc)
1292                         ndlp->nlp_type |= NLP_FCP_TARGET;
1293                 if (npr->Retry)
1294                         ndlp->nlp_fcp_info |= NLP_FCP_2_DEVICE;
1295         }
1296
1297         ndlp->nlp_prev_state = NLP_STE_PRLI_ISSUE;
1298         ndlp->nlp_state = NLP_STE_MAPPED_NODE;
1299         lpfc_nlp_list(phba, ndlp, NLP_MAPPED_LIST);
1300         return ndlp->nlp_state;
1301 }
1302
1303 /*! lpfc_device_rm_prli_issue
1304   *
1305   * \pre
1306   * \post
1307   * \param   phba
1308   * \param   ndlp
1309   * \param   arg
1310   * \param   evt
1311   * \return  uint32_t
1312   *
1313   * \b Description:
1314   *    This routine is envoked when we a request to remove a nport we are in the
1315   *    process of PRLIing. We should software abort outstanding prli, unreg
1316   *    login, send a logout. We will change node state to UNUSED_NODE, put it
1317   *    on plogi list so it can be freed when LOGO completes.
1318   *
1319   */
1320 static uint32_t
1321 lpfc_device_rm_prli_issue(struct lpfc_hba * phba,
1322                           struct lpfc_nodelist * ndlp, void *arg, uint32_t evt)
1323 {
1324         if(ndlp->nlp_flag & NLP_NPR_2B_DISC) {
1325                 ndlp->nlp_flag |= NLP_NODEV_REMOVE;
1326                 return ndlp->nlp_state;
1327         }
1328         else {
1329                 /* software abort outstanding PLOGI */
1330                 lpfc_els_abort(phba, ndlp, 1);
1331
1332                 lpfc_nlp_list(phba, ndlp, NLP_NO_LIST);
1333                 return NLP_STE_FREED_NODE;
1334         }
1335 }
1336
1337
1338 /*! lpfc_device_recov_prli_issue
1339   *
1340   * \pre
1341   * \post
1342   * \param   phba
1343   * \param   ndlp
1344   * \param   arg
1345   * \param   evt
1346   * \return  uint32_t
1347   *
1348   * \b Description:
1349   *    The routine is envoked when the state of a device is unknown, like
1350   *    during a link down. We should remove the nodelist entry from the
1351   *    unmapped list, issue a UNREG_LOGIN, do a software abort of the
1352   *    outstanding PRLI command, then free the node entry.
1353   */
1354 static uint32_t
1355 lpfc_device_recov_prli_issue(struct lpfc_hba * phba,
1356                            struct lpfc_nodelist * ndlp, void *arg, uint32_t evt)
1357 {
1358         /* software abort outstanding PRLI */
1359         lpfc_els_abort(phba, ndlp, 1);
1360
1361         ndlp->nlp_prev_state = NLP_STE_PRLI_ISSUE;
1362         ndlp->nlp_state = NLP_STE_NPR_NODE;
1363         lpfc_nlp_list(phba, ndlp, NLP_NPR_LIST);
1364         spin_lock_irq(phba->host->host_lock);
1365         ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
1366         spin_unlock_irq(phba->host->host_lock);
1367         return ndlp->nlp_state;
1368 }
1369
1370 static uint32_t
1371 lpfc_rcv_plogi_unmap_node(struct lpfc_hba * phba,
1372                           struct lpfc_nodelist * ndlp, void *arg, uint32_t evt)
1373 {
1374         struct lpfc_iocbq *cmdiocb;
1375
1376         cmdiocb = (struct lpfc_iocbq *) arg;
1377
1378         lpfc_rcv_plogi(phba, ndlp, cmdiocb);
1379         return ndlp->nlp_state;
1380 }
1381
1382 static uint32_t
1383 lpfc_rcv_prli_unmap_node(struct lpfc_hba * phba,
1384                          struct lpfc_nodelist * ndlp, void *arg, uint32_t evt)
1385 {
1386         struct lpfc_iocbq *cmdiocb;
1387
1388         cmdiocb = (struct lpfc_iocbq *) arg;
1389
1390         lpfc_rcv_prli(phba, ndlp, cmdiocb);
1391         lpfc_els_rsp_prli_acc(phba, cmdiocb, ndlp);
1392         return ndlp->nlp_state;
1393 }
1394
1395 static uint32_t
1396 lpfc_rcv_logo_unmap_node(struct lpfc_hba * phba,
1397                          struct lpfc_nodelist * ndlp, void *arg, uint32_t evt)
1398 {
1399         struct lpfc_iocbq *cmdiocb;
1400
1401         cmdiocb = (struct lpfc_iocbq *) arg;
1402
1403         lpfc_rcv_logo(phba, ndlp, cmdiocb, ELS_CMD_LOGO);
1404         return ndlp->nlp_state;
1405 }
1406
1407 static uint32_t
1408 lpfc_rcv_padisc_unmap_node(struct lpfc_hba * phba,
1409                            struct lpfc_nodelist * ndlp, void *arg, uint32_t evt)
1410 {
1411         struct lpfc_iocbq *cmdiocb;
1412
1413         cmdiocb = (struct lpfc_iocbq *) arg;
1414
1415         lpfc_rcv_padisc(phba, ndlp, cmdiocb);
1416         return ndlp->nlp_state;
1417 }
1418
1419 static uint32_t
1420 lpfc_rcv_prlo_unmap_node(struct lpfc_hba * phba,
1421                          struct lpfc_nodelist * ndlp, void *arg, uint32_t evt)
1422 {
1423         struct lpfc_iocbq *cmdiocb;
1424
1425         cmdiocb = (struct lpfc_iocbq *) arg;
1426
1427         lpfc_els_rsp_acc(phba, ELS_CMD_PRLO, cmdiocb, ndlp, NULL, 0);
1428         return ndlp->nlp_state;
1429 }
1430
1431 static uint32_t
1432 lpfc_device_recov_unmap_node(struct lpfc_hba * phba,
1433                            struct lpfc_nodelist * ndlp, void *arg, uint32_t evt)
1434 {
1435         ndlp->nlp_prev_state = NLP_STE_UNMAPPED_NODE;
1436         ndlp->nlp_state = NLP_STE_NPR_NODE;
1437         lpfc_nlp_list(phba, ndlp, NLP_NPR_LIST);
1438         ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
1439         lpfc_disc_set_adisc(phba, ndlp);
1440
1441         return ndlp->nlp_state;
1442 }
1443
1444 static uint32_t
1445 lpfc_rcv_plogi_mapped_node(struct lpfc_hba * phba,
1446                            struct lpfc_nodelist * ndlp, void *arg, uint32_t evt)
1447 {
1448         struct lpfc_iocbq *cmdiocb;
1449
1450         cmdiocb = (struct lpfc_iocbq *) arg;
1451
1452         lpfc_rcv_plogi(phba, ndlp, cmdiocb);
1453         return ndlp->nlp_state;
1454 }
1455
1456 static uint32_t
1457 lpfc_rcv_prli_mapped_node(struct lpfc_hba * phba,
1458                           struct lpfc_nodelist * ndlp, void *arg, uint32_t evt)
1459 {
1460         struct lpfc_iocbq *cmdiocb;
1461
1462         cmdiocb = (struct lpfc_iocbq *) arg;
1463
1464         lpfc_els_rsp_prli_acc(phba, cmdiocb, ndlp);
1465         return ndlp->nlp_state;
1466 }
1467
1468 static uint32_t
1469 lpfc_rcv_logo_mapped_node(struct lpfc_hba * phba,
1470                           struct lpfc_nodelist * ndlp, void *arg, uint32_t evt)
1471 {
1472         struct lpfc_iocbq *cmdiocb;
1473
1474         cmdiocb = (struct lpfc_iocbq *) arg;
1475
1476         lpfc_rcv_logo(phba, ndlp, cmdiocb, ELS_CMD_LOGO);
1477         return ndlp->nlp_state;
1478 }
1479
1480 static uint32_t
1481 lpfc_rcv_padisc_mapped_node(struct lpfc_hba * phba,
1482                             struct lpfc_nodelist * ndlp, void *arg,
1483                             uint32_t evt)
1484 {
1485         struct lpfc_iocbq *cmdiocb;
1486
1487         cmdiocb = (struct lpfc_iocbq *) arg;
1488
1489         lpfc_rcv_padisc(phba, ndlp, cmdiocb);
1490         return ndlp->nlp_state;
1491 }
1492
1493 static uint32_t
1494 lpfc_rcv_prlo_mapped_node(struct lpfc_hba * phba,
1495                           struct lpfc_nodelist * ndlp, void *arg, uint32_t evt)
1496 {
1497         struct lpfc_iocbq *cmdiocb;
1498
1499         cmdiocb = (struct lpfc_iocbq *) arg;
1500
1501         /* flush the target */
1502         spin_lock_irq(phba->host->host_lock);
1503         lpfc_sli_abort_iocb(phba, &phba->sli.ring[phba->sli.fcp_ring],
1504                                ndlp->nlp_sid, 0, 0, LPFC_CTX_TGT);
1505         spin_unlock_irq(phba->host->host_lock);
1506
1507         /* Treat like rcv logo */
1508         lpfc_rcv_logo(phba, ndlp, cmdiocb, ELS_CMD_PRLO);
1509         return ndlp->nlp_state;
1510 }
1511
1512 static uint32_t
1513 lpfc_device_recov_mapped_node(struct lpfc_hba * phba,
1514                             struct lpfc_nodelist * ndlp, void *arg,
1515                             uint32_t evt)
1516 {
1517         ndlp->nlp_prev_state = NLP_STE_MAPPED_NODE;
1518         ndlp->nlp_state = NLP_STE_NPR_NODE;
1519         lpfc_nlp_list(phba, ndlp, NLP_NPR_LIST);
1520         spin_lock_irq(phba->host->host_lock);
1521         ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
1522         spin_unlock_irq(phba->host->host_lock);
1523         lpfc_disc_set_adisc(phba, ndlp);
1524         return ndlp->nlp_state;
1525 }
1526
1527 static uint32_t
1528 lpfc_rcv_plogi_npr_node(struct lpfc_hba * phba,
1529                             struct lpfc_nodelist * ndlp, void *arg,
1530                             uint32_t evt)
1531 {
1532         struct lpfc_iocbq *cmdiocb;
1533
1534         cmdiocb = (struct lpfc_iocbq *) arg;
1535
1536         /* Ignore PLOGI if we have an outstanding LOGO */
1537         if (ndlp->nlp_flag & NLP_LOGO_SND) {
1538                 return ndlp->nlp_state;
1539         }
1540
1541         if (lpfc_rcv_plogi(phba, ndlp, cmdiocb)) {
1542                 spin_lock_irq(phba->host->host_lock);
1543                 ndlp->nlp_flag &= ~NLP_NPR_ADISC;
1544                 spin_unlock_irq(phba->host->host_lock);
1545                 return ndlp->nlp_state;
1546         }
1547
1548         /* send PLOGI immediately, move to PLOGI issue state */
1549         if (!(ndlp->nlp_flag & NLP_DELAY_TMO)) {
1550                 ndlp->nlp_prev_state = NLP_STE_NPR_NODE;
1551                 ndlp->nlp_state = NLP_STE_PLOGI_ISSUE;
1552                 lpfc_nlp_list(phba, ndlp, NLP_PLOGI_LIST);
1553                 lpfc_issue_els_plogi(phba, ndlp->nlp_DID, 0);
1554         }
1555
1556         return ndlp->nlp_state;
1557 }
1558
1559 static uint32_t
1560 lpfc_rcv_prli_npr_node(struct lpfc_hba * phba,
1561                             struct lpfc_nodelist * ndlp, void *arg,
1562                             uint32_t evt)
1563 {
1564         struct lpfc_iocbq     *cmdiocb;
1565         struct ls_rjt          stat;
1566
1567         cmdiocb = (struct lpfc_iocbq *) arg;
1568
1569         memset(&stat, 0, sizeof (struct ls_rjt));
1570         stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
1571         stat.un.b.lsRjtRsnCodeExp = LSEXP_NOTHING_MORE;
1572         lpfc_els_rsp_reject(phba, stat.un.lsRjtError, cmdiocb, ndlp);
1573
1574         if (!(ndlp->nlp_flag & NLP_DELAY_TMO)) {
1575                 if (ndlp->nlp_flag & NLP_NPR_ADISC) {
1576                         spin_lock_irq(phba->host->host_lock);
1577                         ndlp->nlp_flag &= ~NLP_NPR_ADISC;
1578                         spin_unlock_irq(phba->host->host_lock);
1579                         ndlp->nlp_prev_state = NLP_STE_NPR_NODE;
1580                         ndlp->nlp_state = NLP_STE_ADISC_ISSUE;
1581                         lpfc_nlp_list(phba, ndlp, NLP_ADISC_LIST);
1582                         lpfc_issue_els_adisc(phba, ndlp, 0);
1583                 } else {
1584                         ndlp->nlp_prev_state = NLP_STE_NPR_NODE;
1585                         ndlp->nlp_state = NLP_STE_PLOGI_ISSUE;
1586                         lpfc_nlp_list(phba, ndlp, NLP_PLOGI_LIST);
1587                         lpfc_issue_els_plogi(phba, ndlp->nlp_DID, 0);
1588                 }
1589
1590         }
1591         return ndlp->nlp_state;
1592 }
1593
1594 static uint32_t
1595 lpfc_rcv_logo_npr_node(struct lpfc_hba * phba,
1596                             struct lpfc_nodelist * ndlp, void *arg,
1597                             uint32_t evt)
1598 {
1599         struct lpfc_iocbq     *cmdiocb;
1600
1601         cmdiocb = (struct lpfc_iocbq *) arg;
1602
1603         lpfc_rcv_logo(phba, ndlp, cmdiocb, ELS_CMD_LOGO);
1604         return ndlp->nlp_state;
1605 }
1606
1607 static uint32_t
1608 lpfc_rcv_padisc_npr_node(struct lpfc_hba * phba,
1609                             struct lpfc_nodelist * ndlp, void *arg,
1610                             uint32_t evt)
1611 {
1612         struct lpfc_iocbq     *cmdiocb;
1613
1614         cmdiocb = (struct lpfc_iocbq *) arg;
1615
1616         lpfc_rcv_padisc(phba, ndlp, cmdiocb);
1617
1618         /*
1619          * Do not start discovery if discovery is about to start
1620          * or discovery in progress for this node. Starting discovery
1621          * here will affect the counting of discovery threads.
1622          */
1623         if ((!(ndlp->nlp_flag & NLP_DELAY_TMO)) &&
1624                 (ndlp->nlp_flag & NLP_NPR_2B_DISC)){
1625                 if (ndlp->nlp_flag & NLP_NPR_ADISC) {
1626                         ndlp->nlp_prev_state = NLP_STE_NPR_NODE;
1627                         ndlp->nlp_state = NLP_STE_ADISC_ISSUE;
1628                         lpfc_nlp_list(phba, ndlp, NLP_ADISC_LIST);
1629                         lpfc_issue_els_adisc(phba, ndlp, 0);
1630                 } else {
1631                         ndlp->nlp_prev_state = NLP_STE_NPR_NODE;
1632                         ndlp->nlp_state = NLP_STE_PLOGI_ISSUE;
1633                         lpfc_nlp_list(phba, ndlp, NLP_PLOGI_LIST);
1634                         lpfc_issue_els_plogi(phba, ndlp->nlp_DID, 0);
1635                 }
1636         }
1637         return ndlp->nlp_state;
1638 }
1639
1640 static uint32_t
1641 lpfc_rcv_prlo_npr_node(struct lpfc_hba * phba,
1642                             struct lpfc_nodelist * ndlp, void *arg,
1643                             uint32_t evt)
1644 {
1645         struct lpfc_iocbq     *cmdiocb;
1646
1647         cmdiocb = (struct lpfc_iocbq *) arg;
1648
1649         spin_lock_irq(phba->host->host_lock);
1650         ndlp->nlp_flag |= NLP_LOGO_ACC;
1651         spin_unlock_irq(phba->host->host_lock);
1652
1653         lpfc_els_rsp_acc(phba, ELS_CMD_ACC, cmdiocb, ndlp, NULL, 0);
1654
1655         if (!(ndlp->nlp_flag & NLP_DELAY_TMO)) {
1656                 mod_timer(&ndlp->nlp_delayfunc, jiffies + HZ * 1);
1657                 spin_lock_irq(phba->host->host_lock);
1658                 ndlp->nlp_flag |= NLP_DELAY_TMO;
1659                 ndlp->nlp_flag &= ~NLP_NPR_ADISC;
1660                 spin_unlock_irq(phba->host->host_lock);
1661                 ndlp->nlp_last_elscmd = ELS_CMD_PLOGI;
1662         } else {
1663                 spin_lock_irq(phba->host->host_lock);
1664                 ndlp->nlp_flag &= ~NLP_NPR_ADISC;
1665                 spin_unlock_irq(phba->host->host_lock);
1666         }
1667         return ndlp->nlp_state;
1668 }
1669
1670 static uint32_t
1671 lpfc_cmpl_plogi_npr_node(struct lpfc_hba * phba,
1672                           struct lpfc_nodelist * ndlp, void *arg, uint32_t evt)
1673 {
1674         struct lpfc_iocbq *cmdiocb, *rspiocb;
1675         IOCB_t *irsp;
1676
1677         cmdiocb = (struct lpfc_iocbq *) arg;
1678         rspiocb = cmdiocb->context_un.rsp_iocb;
1679
1680         irsp = &rspiocb->iocb;
1681         if (irsp->ulpStatus) {
1682                 lpfc_nlp_list(phba, ndlp, NLP_NO_LIST);
1683                 return NLP_STE_FREED_NODE;
1684         }
1685         return ndlp->nlp_state;
1686 }
1687
1688 static uint32_t
1689 lpfc_cmpl_prli_npr_node(struct lpfc_hba * phba,
1690                           struct lpfc_nodelist * ndlp, void *arg, uint32_t evt)
1691 {
1692         struct lpfc_iocbq *cmdiocb, *rspiocb;
1693         IOCB_t *irsp;
1694
1695         cmdiocb = (struct lpfc_iocbq *) arg;
1696         rspiocb = cmdiocb->context_un.rsp_iocb;
1697
1698         irsp = &rspiocb->iocb;
1699         if (irsp->ulpStatus && (ndlp->nlp_flag & NLP_NODEV_REMOVE)) {
1700                 lpfc_nlp_list(phba, ndlp, NLP_NO_LIST);
1701                 return NLP_STE_FREED_NODE;
1702         }
1703         return ndlp->nlp_state;
1704 }
1705
1706 static uint32_t
1707 lpfc_cmpl_logo_npr_node(struct lpfc_hba * phba,
1708                 struct lpfc_nodelist * ndlp, void *arg, uint32_t evt)
1709 {
1710         lpfc_unreg_rpi(phba, ndlp);
1711         /* This routine does nothing, just return the current state */
1712         return ndlp->nlp_state;
1713 }
1714
1715 static uint32_t
1716 lpfc_cmpl_adisc_npr_node(struct lpfc_hba * phba,
1717                             struct lpfc_nodelist * ndlp, void *arg,
1718                             uint32_t evt)
1719 {
1720         struct lpfc_iocbq *cmdiocb, *rspiocb;
1721         IOCB_t *irsp;
1722
1723         cmdiocb = (struct lpfc_iocbq *) arg;
1724         rspiocb = cmdiocb->context_un.rsp_iocb;
1725
1726         irsp = &rspiocb->iocb;
1727         if (irsp->ulpStatus && (ndlp->nlp_flag & NLP_NODEV_REMOVE)) {
1728                 lpfc_nlp_list(phba, ndlp, NLP_NO_LIST);
1729                 return NLP_STE_FREED_NODE;
1730         }
1731         return ndlp->nlp_state;
1732 }
1733
1734 static uint32_t
1735 lpfc_cmpl_reglogin_npr_node(struct lpfc_hba * phba,
1736                             struct lpfc_nodelist * ndlp, void *arg,
1737                             uint32_t evt)
1738 {
1739         LPFC_MBOXQ_t *pmb;
1740         MAILBOX_t *mb;
1741
1742         pmb = (LPFC_MBOXQ_t *) arg;
1743         mb = &pmb->mb;
1744
1745         if (!mb->mbxStatus)
1746                 ndlp->nlp_rpi = mb->un.varWords[0];
1747         else {
1748                 if (ndlp->nlp_flag & NLP_NODEV_REMOVE) {
1749                         lpfc_nlp_list(phba, ndlp, NLP_NO_LIST);
1750                         return NLP_STE_FREED_NODE;
1751                 }
1752         }
1753         return ndlp->nlp_state;
1754 }
1755
1756 static uint32_t
1757 lpfc_device_rm_npr_node(struct lpfc_hba * phba,
1758                             struct lpfc_nodelist * ndlp, void *arg,
1759                             uint32_t evt)
1760 {
1761         if (ndlp->nlp_flag & NLP_NPR_2B_DISC) {
1762                 ndlp->nlp_flag |= NLP_NODEV_REMOVE;
1763                 return ndlp->nlp_state;
1764         }
1765         lpfc_nlp_list(phba, ndlp, NLP_NO_LIST);
1766         return NLP_STE_FREED_NODE;
1767 }
1768
1769 static uint32_t
1770 lpfc_device_recov_npr_node(struct lpfc_hba * phba,
1771                             struct lpfc_nodelist * ndlp, void *arg,
1772                             uint32_t evt)
1773 {
1774         spin_lock_irq(phba->host->host_lock);
1775         ndlp->nlp_flag &= ~(NLP_NODEV_REMOVE | NLP_NPR_2B_DISC);
1776         spin_unlock_irq(phba->host->host_lock);
1777         if (ndlp->nlp_flag & NLP_DELAY_TMO) {
1778                 lpfc_cancel_retry_delay_tmo(phba, ndlp);
1779         }
1780         return ndlp->nlp_state;
1781 }
1782
1783
1784 /* This next section defines the NPort Discovery State Machine */
1785
1786 /* There are 4 different double linked lists nodelist entries can reside on.
1787  * The plogi list and adisc list are used when Link Up discovery or RSCN
1788  * processing is needed. Each list holds the nodes that we will send PLOGI
1789  * or ADISC on. These lists will keep track of what nodes will be effected
1790  * by an RSCN, or a Link Up (Typically, all nodes are effected on Link Up).
1791  * The unmapped_list will contain all nodes that we have successfully logged
1792  * into at the Fibre Channel level. The mapped_list will contain all nodes
1793  * that are mapped FCP targets.
1794  */
1795 /*
1796  * The bind list is a list of undiscovered (potentially non-existent) nodes
1797  * that we have saved binding information on. This information is used when
1798  * nodes transition from the unmapped to the mapped list.
1799  */
1800 /* For UNUSED_NODE state, the node has just been allocated .
1801  * For PLOGI_ISSUE and REG_LOGIN_ISSUE, the node is on
1802  * the PLOGI list. For REG_LOGIN_COMPL, the node is taken off the PLOGI list
1803  * and put on the unmapped list. For ADISC processing, the node is taken off
1804  * the ADISC list and placed on either the mapped or unmapped list (depending
1805  * on its previous state). Once on the unmapped list, a PRLI is issued and the
1806  * state changed to PRLI_ISSUE. When the PRLI completion occurs, the state is
1807  * changed to UNMAPPED_NODE. If the completion indicates a mapped
1808  * node, the node is taken off the unmapped list. The binding list is checked
1809  * for a valid binding, or a binding is automatically assigned. If binding
1810  * assignment is unsuccessful, the node is left on the unmapped list. If
1811  * binding assignment is successful, the associated binding list entry (if
1812  * any) is removed, and the node is placed on the mapped list.
1813  */
1814 /*
1815  * For a Link Down, all nodes on the ADISC, PLOGI, unmapped or mapped
1816  * lists will receive a DEVICE_RECOVERY event. If the linkdown or nodev timers
1817  * expire, all effected nodes will receive a DEVICE_RM event.
1818  */
1819 /*
1820  * For a Link Up or RSCN, all nodes will move from the mapped / unmapped lists
1821  * to either the ADISC or PLOGI list.  After a Nameserver query or ALPA loopmap
1822  * check, additional nodes may be added or removed (via DEVICE_RM) to / from
1823  * the PLOGI or ADISC lists. Once the PLOGI and ADISC lists are populated,
1824  * we will first process the ADISC list.  32 entries are processed initially and
1825  * ADISC is initited for each one.  Completions / Events for each node are
1826  * funnelled thru the state machine.  As each node finishes ADISC processing, it
1827  * starts ADISC for any nodes waiting for ADISC processing. If no nodes are
1828  * waiting, and the ADISC list count is identically 0, then we are done. For
1829  * Link Up discovery, since all nodes on the PLOGI list are UNREG_LOGIN'ed, we
1830  * can issue a CLEAR_LA and reenable Link Events. Next we will process the PLOGI
1831  * list.  32 entries are processed initially and PLOGI is initited for each one.
1832  * Completions / Events for each node are funnelled thru the state machine.  As
1833  * each node finishes PLOGI processing, it starts PLOGI for any nodes waiting
1834  * for PLOGI processing. If no nodes are waiting, and the PLOGI list count is
1835  * indentically 0, then we are done. We have now completed discovery / RSCN
1836  * handling. Upon completion, ALL nodes should be on either the mapped or
1837  * unmapped lists.
1838  */
1839
1840 static uint32_t (*lpfc_disc_action[NLP_STE_MAX_STATE * NLP_EVT_MAX_EVENT])
1841      (struct lpfc_hba *, struct lpfc_nodelist *, void *, uint32_t) = {
1842         /* Action routine                  Event       Current State  */
1843         lpfc_rcv_plogi_unused_node,     /* RCV_PLOGI   UNUSED_NODE    */
1844         lpfc_rcv_els_unused_node,       /* RCV_PRLI        */
1845         lpfc_rcv_logo_unused_node,      /* RCV_LOGO        */
1846         lpfc_rcv_els_unused_node,       /* RCV_ADISC       */
1847         lpfc_rcv_els_unused_node,       /* RCV_PDISC       */
1848         lpfc_rcv_els_unused_node,       /* RCV_PRLO        */
1849         lpfc_disc_illegal,              /* CMPL_PLOGI      */
1850         lpfc_disc_illegal,              /* CMPL_PRLI       */
1851         lpfc_cmpl_logo_unused_node,     /* CMPL_LOGO       */
1852         lpfc_disc_illegal,              /* CMPL_ADISC      */
1853         lpfc_disc_illegal,              /* CMPL_REG_LOGIN  */
1854         lpfc_device_rm_unused_node,     /* DEVICE_RM       */
1855         lpfc_disc_illegal,              /* DEVICE_RECOVERY */
1856
1857         lpfc_rcv_plogi_plogi_issue,     /* RCV_PLOGI   PLOGI_ISSUE    */
1858         lpfc_rcv_els_plogi_issue,       /* RCV_PRLI        */
1859         lpfc_rcv_logo_plogi_issue,      /* RCV_LOGO        */
1860         lpfc_rcv_els_plogi_issue,       /* RCV_ADISC       */
1861         lpfc_rcv_els_plogi_issue,       /* RCV_PDISC       */
1862         lpfc_rcv_els_plogi_issue,       /* RCV_PRLO        */
1863         lpfc_cmpl_plogi_plogi_issue,    /* CMPL_PLOGI      */
1864         lpfc_disc_illegal,              /* CMPL_PRLI       */
1865         lpfc_disc_illegal,              /* CMPL_LOGO       */
1866         lpfc_disc_illegal,              /* CMPL_ADISC      */
1867         lpfc_disc_illegal,              /* CMPL_REG_LOGIN  */
1868         lpfc_device_rm_plogi_issue,     /* DEVICE_RM       */
1869         lpfc_device_recov_plogi_issue,  /* DEVICE_RECOVERY */
1870
1871         lpfc_rcv_plogi_adisc_issue,     /* RCV_PLOGI   ADISC_ISSUE    */
1872         lpfc_rcv_prli_adisc_issue,      /* RCV_PRLI        */
1873         lpfc_rcv_logo_adisc_issue,      /* RCV_LOGO        */
1874         lpfc_rcv_padisc_adisc_issue,    /* RCV_ADISC       */
1875         lpfc_rcv_padisc_adisc_issue,    /* RCV_PDISC       */
1876         lpfc_rcv_prlo_adisc_issue,      /* RCV_PRLO        */
1877         lpfc_disc_illegal,              /* CMPL_PLOGI      */
1878         lpfc_disc_illegal,              /* CMPL_PRLI       */
1879         lpfc_disc_illegal,              /* CMPL_LOGO       */
1880         lpfc_cmpl_adisc_adisc_issue,    /* CMPL_ADISC      */
1881         lpfc_disc_illegal,              /* CMPL_REG_LOGIN  */
1882         lpfc_device_rm_adisc_issue,     /* DEVICE_RM       */
1883         lpfc_device_recov_adisc_issue,  /* DEVICE_RECOVERY */
1884
1885         lpfc_rcv_plogi_reglogin_issue,  /* RCV_PLOGI  REG_LOGIN_ISSUE */
1886         lpfc_rcv_prli_reglogin_issue,   /* RCV_PLOGI       */
1887         lpfc_rcv_logo_reglogin_issue,   /* RCV_LOGO        */
1888         lpfc_rcv_padisc_reglogin_issue, /* RCV_ADISC       */
1889         lpfc_rcv_padisc_reglogin_issue, /* RCV_PDISC       */
1890         lpfc_rcv_prlo_reglogin_issue,   /* RCV_PRLO        */
1891         lpfc_disc_illegal,              /* CMPL_PLOGI      */
1892         lpfc_disc_illegal,              /* CMPL_PRLI       */
1893         lpfc_disc_illegal,              /* CMPL_LOGO       */
1894         lpfc_disc_illegal,              /* CMPL_ADISC      */
1895         lpfc_cmpl_reglogin_reglogin_issue,/* CMPL_REG_LOGIN  */
1896         lpfc_device_rm_reglogin_issue,  /* DEVICE_RM       */
1897         lpfc_device_recov_reglogin_issue,/* DEVICE_RECOVERY */
1898
1899         lpfc_rcv_plogi_prli_issue,      /* RCV_PLOGI   PRLI_ISSUE     */
1900         lpfc_rcv_prli_prli_issue,       /* RCV_PRLI        */
1901         lpfc_rcv_logo_prli_issue,       /* RCV_LOGO        */
1902         lpfc_rcv_padisc_prli_issue,     /* RCV_ADISC       */
1903         lpfc_rcv_padisc_prli_issue,     /* RCV_PDISC       */
1904         lpfc_rcv_prlo_prli_issue,       /* RCV_PRLO        */
1905         lpfc_disc_illegal,              /* CMPL_PLOGI      */
1906         lpfc_cmpl_prli_prli_issue,      /* CMPL_PRLI       */
1907         lpfc_disc_illegal,              /* CMPL_LOGO       */
1908         lpfc_disc_illegal,              /* CMPL_ADISC      */
1909         lpfc_disc_illegal,              /* CMPL_REG_LOGIN  */
1910         lpfc_device_rm_prli_issue,      /* DEVICE_RM       */
1911         lpfc_device_recov_prli_issue,   /* DEVICE_RECOVERY */
1912
1913         lpfc_rcv_plogi_unmap_node,      /* RCV_PLOGI   UNMAPPED_NODE  */
1914         lpfc_rcv_prli_unmap_node,       /* RCV_PRLI        */
1915         lpfc_rcv_logo_unmap_node,       /* RCV_LOGO        */
1916         lpfc_rcv_padisc_unmap_node,     /* RCV_ADISC       */
1917         lpfc_rcv_padisc_unmap_node,     /* RCV_PDISC       */
1918         lpfc_rcv_prlo_unmap_node,       /* RCV_PRLO        */
1919         lpfc_disc_illegal,              /* CMPL_PLOGI      */
1920         lpfc_disc_illegal,              /* CMPL_PRLI       */
1921         lpfc_disc_illegal,              /* CMPL_LOGO       */
1922         lpfc_disc_illegal,              /* CMPL_ADISC      */
1923         lpfc_disc_illegal,              /* CMPL_REG_LOGIN  */
1924         lpfc_disc_illegal,              /* DEVICE_RM       */
1925         lpfc_device_recov_unmap_node,   /* DEVICE_RECOVERY */
1926
1927         lpfc_rcv_plogi_mapped_node,     /* RCV_PLOGI   MAPPED_NODE    */
1928         lpfc_rcv_prli_mapped_node,      /* RCV_PRLI        */
1929         lpfc_rcv_logo_mapped_node,      /* RCV_LOGO        */
1930         lpfc_rcv_padisc_mapped_node,    /* RCV_ADISC       */
1931         lpfc_rcv_padisc_mapped_node,    /* RCV_PDISC       */
1932         lpfc_rcv_prlo_mapped_node,      /* RCV_PRLO        */
1933         lpfc_disc_illegal,              /* CMPL_PLOGI      */
1934         lpfc_disc_illegal,              /* CMPL_PRLI       */
1935         lpfc_disc_illegal,              /* CMPL_LOGO       */
1936         lpfc_disc_illegal,              /* CMPL_ADISC      */
1937         lpfc_disc_illegal,              /* CMPL_REG_LOGIN  */
1938         lpfc_disc_illegal,              /* DEVICE_RM       */
1939         lpfc_device_recov_mapped_node,  /* DEVICE_RECOVERY */
1940
1941         lpfc_rcv_plogi_npr_node,        /* RCV_PLOGI   NPR_NODE    */
1942         lpfc_rcv_prli_npr_node,         /* RCV_PRLI        */
1943         lpfc_rcv_logo_npr_node,         /* RCV_LOGO        */
1944         lpfc_rcv_padisc_npr_node,       /* RCV_ADISC       */
1945         lpfc_rcv_padisc_npr_node,       /* RCV_PDISC       */
1946         lpfc_rcv_prlo_npr_node,         /* RCV_PRLO        */
1947         lpfc_cmpl_plogi_npr_node,       /* CMPL_PLOGI      */
1948         lpfc_cmpl_prli_npr_node,        /* CMPL_PRLI       */
1949         lpfc_cmpl_logo_npr_node,        /* CMPL_LOGO       */
1950         lpfc_cmpl_adisc_npr_node,       /* CMPL_ADISC      */
1951         lpfc_cmpl_reglogin_npr_node,    /* CMPL_REG_LOGIN  */
1952         lpfc_device_rm_npr_node,        /* DEVICE_RM       */
1953         lpfc_device_recov_npr_node,     /* DEVICE_RECOVERY */
1954 };
1955
1956 int
1957 lpfc_disc_state_machine(struct lpfc_hba * phba,
1958                         struct lpfc_nodelist * ndlp, void *arg, uint32_t evt)
1959 {
1960         uint32_t cur_state, rc;
1961         uint32_t(*func) (struct lpfc_hba *, struct lpfc_nodelist *, void *,
1962                          uint32_t);
1963
1964         ndlp->nlp_disc_refcnt++;
1965         cur_state = ndlp->nlp_state;
1966
1967         /* DSM in event <evt> on NPort <nlp_DID> in state <cur_state> */
1968         lpfc_printf_log(phba,
1969                         KERN_INFO,
1970                         LOG_DISCOVERY,
1971                         "%d:0211 DSM in event x%x on NPort x%x in state %d "
1972                         "Data: x%x\n",
1973                         phba->brd_no,
1974                         evt, ndlp->nlp_DID, cur_state, ndlp->nlp_flag);
1975
1976         func = lpfc_disc_action[(cur_state * NLP_EVT_MAX_EVENT) + evt];
1977         rc = (func) (phba, ndlp, arg, evt);
1978
1979         /* DSM out state <rc> on NPort <nlp_DID> */
1980         lpfc_printf_log(phba,
1981                        KERN_INFO,
1982                        LOG_DISCOVERY,
1983                        "%d:0212 DSM out state %d on NPort x%x Data: x%x\n",
1984                        phba->brd_no,
1985                        rc, ndlp->nlp_DID, ndlp->nlp_flag);
1986
1987         ndlp->nlp_disc_refcnt--;
1988
1989         /* Check to see if ndlp removal is deferred */
1990         if ((ndlp->nlp_disc_refcnt == 0)
1991             && (ndlp->nlp_flag & NLP_DELAY_REMOVE)) {
1992                 spin_lock_irq(phba->host->host_lock);
1993                 ndlp->nlp_flag &= ~NLP_DELAY_REMOVE;
1994                 spin_unlock_irq(phba->host->host_lock);
1995                 lpfc_nlp_remove(phba, ndlp);
1996                 return NLP_STE_FREED_NODE;
1997         }
1998         if (rc == NLP_STE_FREED_NODE)
1999                 return NLP_STE_FREED_NODE;
2000         return rc;
2001 }