drivers/scsi/lpfc/lpfc_hbadisc.c

   1 /*******************************************************************
   2  * This file is part of the Emulex Linux Device Driver for         *
   3  * Fibre Channel Host Bus Adapters.                                *
   4  * Copyright (C) 2004-2007 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/kthread.h>
  25 #include <linux/interrupt.h>
  26
  27 #include <scsi/scsi.h>
  28 #include <scsi/scsi_device.h>
  29 #include <scsi/scsi_host.h>
  30 #include <scsi/scsi_transport_fc.h>
  31
  32 #include "lpfc_hw.h"
  33 #include "lpfc_disc.h"
  34 #include "lpfc_sli.h"
  35 #include "lpfc_scsi.h"
  36 #include "lpfc.h"
  37 #include "lpfc_logmsg.h"
  38 #include "lpfc_crtn.h"
  39 #include "lpfc_vport.h"
  40 #include "lpfc_debugfs.h"
  41
  42 /* AlpaArray for assignment of scsid for scan-down and bind_method */
  43 static uint8_t lpfcAlpaArray[] = {
  44         0xEF, 0xE8, 0xE4, 0xE2, 0xE1, 0xE0, 0xDC, 0xDA, 0xD9, 0xD6,
  45         0xD5, 0xD4, 0xD3, 0xD2, 0xD1, 0xCE, 0xCD, 0xCC, 0xCB, 0xCA,
  46         0xC9, 0xC7, 0xC6, 0xC5, 0xC3, 0xBC, 0xBA, 0xB9, 0xB6, 0xB5,
  47         0xB4, 0xB3, 0xB2, 0xB1, 0xAE, 0xAD, 0xAC, 0xAB, 0xAA, 0xA9,
  48         0xA7, 0xA6, 0xA5, 0xA3, 0x9F, 0x9E, 0x9D, 0x9B, 0x98, 0x97,
  49         0x90, 0x8F, 0x88, 0x84, 0x82, 0x81, 0x80, 0x7C, 0x7A, 0x79,
  50         0x76, 0x75, 0x74, 0x73, 0x72, 0x71, 0x6E, 0x6D, 0x6C, 0x6B,
  51         0x6A, 0x69, 0x67, 0x66, 0x65, 0x63, 0x5C, 0x5A, 0x59, 0x56,
  52         0x55, 0x54, 0x53, 0x52, 0x51, 0x4E, 0x4D, 0x4C, 0x4B, 0x4A,
  53         0x49, 0x47, 0x46, 0x45, 0x43, 0x3C, 0x3A, 0x39, 0x36, 0x35,
  54         0x34, 0x33, 0x32, 0x31, 0x2E, 0x2D, 0x2C, 0x2B, 0x2A, 0x29,
  55         0x27, 0x26, 0x25, 0x23, 0x1F, 0x1E, 0x1D, 0x1B, 0x18, 0x17,
  56         0x10, 0x0F, 0x08, 0x04, 0x02, 0x01
  57 };
  58
  59 static void lpfc_disc_timeout_handler(struct lpfc_vport *);
  60
  61 void
  62 lpfc_terminate_rport_io(struct fc_rport *rport)
  63 {
  64         struct lpfc_rport_data *rdata;
  65         struct lpfc_nodelist * ndlp;
  66         struct lpfc_hba *phba;
  67
  68         rdata = rport->dd_data;
  69         ndlp = rdata->pnode;
  70
  71         if (!ndlp) {
  72                 if (rport->roles & FC_RPORT_ROLE_FCP_TARGET)
  73                         printk(KERN_ERR "Cannot find remote node"
  74                         " to terminate I/O Data x%x\n",
  75                         rport->port_id);
  76                 return;
  77         }
  78
  79         phba  = ndlp->vport->phba;
  80
  81         lpfc_debugfs_disc_trc(ndlp->vport, LPFC_DISC_TRC_RPORT,
  82                 "rport terminate: sid:x%x did:x%x flg:x%x",
  83                 ndlp->nlp_sid, ndlp->nlp_DID, ndlp->nlp_flag);
  84
  85         if (ndlp->nlp_sid != NLP_NO_SID) {
  86                 lpfc_sli_abort_iocb(ndlp->vport,
  87                         &phba->sli.ring[phba->sli.fcp_ring],
  88                         ndlp->nlp_sid, 0, LPFC_CTX_TGT);
  89         }
  90
  91         /*
  92          * A device is normally blocked for rediscovery and unblocked when
  93          * devloss timeout happens.  In case a vport is removed or driver
  94          * unloaded before devloss timeout happens, we need to unblock here.
  95          */
  96         scsi_target_unblock(&rport->dev);
  97         return;
  98 }
  99
 100 /*
 101  * This function will be called when dev_loss_tmo fire.
 102  */
 103 void
 104 lpfc_dev_loss_tmo_callbk(struct fc_rport *rport)
 105 {
 106         struct lpfc_rport_data *rdata;
 107         struct lpfc_nodelist * ndlp;
 108         struct lpfc_vport *vport;
 109         struct lpfc_hba   *phba;
 110         struct lpfc_work_evt *evtp;
 111
 112         rdata = rport->dd_data;
 113         ndlp = rdata->pnode;
 114
 115         if (!ndlp) {
 116                 if (rport->scsi_target_id != -1) {
 117                         printk(KERN_ERR "Cannot find remote node"
 118                                 " for rport in dev_loss_tmo_callbk x%x\n",
 119                                 rport->port_id);
 120                 }
 121                 return;
 122         }
 123
 124         vport = ndlp->vport;
 125         phba  = vport->phba;
 126
 127         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_RPORT,
 128                 "rport devlosscb: sid:x%x did:x%x flg:x%x",
 129                 ndlp->nlp_sid, ndlp->nlp_DID, ndlp->nlp_flag);
 130
 131         evtp = &ndlp->dev_loss_evt;
 132
 133         if (!list_empty(&evtp->evt_listp))
 134                 return;
 135
 136         spin_lock_irq(&phba->hbalock);
 137         evtp->evt_arg1  = ndlp;
 138         evtp->evt       = LPFC_EVT_DEV_LOSS;
 139         list_add_tail(&evtp->evt_listp, &phba->work_list);
 140         if (phba->work_wait)
 141                 wake_up(phba->work_wait);
 142
 143         spin_unlock_irq(&phba->hbalock);
 144
 145         return;
 146 }
 147
 148 /*
 149  * This function is called from the worker thread when dev_loss_tmo
 150  * expire.
 151  */
 152 void
 153 lpfc_dev_loss_tmo_handler(struct lpfc_nodelist *ndlp)
 154 {
 155         struct lpfc_rport_data *rdata;
 156         struct fc_rport   *rport;
 157         struct lpfc_vport *vport;
 158         struct lpfc_hba   *phba;
 159         uint8_t *name;
 160         int  put_node;
 161         int  put_rport;
 162         int warn_on = 0;
 163
 164         rport = ndlp->rport;
 165
 166         if (!rport)
 167                 return;
 168
 169         rdata = rport->dd_data;
 170         name = (uint8_t *) &ndlp->nlp_portname;
 171         vport = ndlp->vport;
 172         phba  = vport->phba;
 173
 174         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_RPORT,
 175                 "rport devlosstmo:did:x%x type:x%x id:x%x",
 176                 ndlp->nlp_DID, ndlp->nlp_type, rport->scsi_target_id);
 177
 178         if (!(vport->load_flag & FC_UNLOADING) &&
 179             ndlp->nlp_state == NLP_STE_MAPPED_NODE)
 180                 return;
 181
 182         if (ndlp->nlp_type & NLP_FABRIC) {
 183                 /* We will clean up these Nodes in linkup */
 184                 put_node = rdata->pnode != NULL;
 185                 put_rport = ndlp->rport != NULL;
 186                 rdata->pnode = NULL;
 187                 ndlp->rport = NULL;
 188                 if (put_node)
 189                         lpfc_nlp_put(ndlp);
 190                 if (put_rport)
 191                         put_device(&rport->dev);
 192                 return;
 193         }
 194
 195         if (ndlp->nlp_sid != NLP_NO_SID) {
 196                 warn_on = 1;
 197                 /* flush the target */
 198                 lpfc_sli_abort_iocb(vport, &phba->sli.ring[phba->sli.fcp_ring],
 199                                     ndlp->nlp_sid, 0, LPFC_CTX_TGT);
 200         }
 201         if (vport->load_flag & FC_UNLOADING)
 202                 warn_on = 0;
 203
 204         if (warn_on) {
 205                 lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
 206                                  "0203 Devloss timeout on "
 207                                  "WWPN %x:%x:%x:%x:%x:%x:%x:%x "
 208                                  "NPort x%x Data: x%x x%x x%x\n",
 209                                  *name, *(name+1), *(name+2), *(name+3),
 210                                  *(name+4), *(name+5), *(name+6), *(name+7),
 211                                  ndlp->nlp_DID, ndlp->nlp_flag,
 212                                  ndlp->nlp_state, ndlp->nlp_rpi);
 213         } else {
 214                 lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
 215                                  "0204 Devloss timeout on "
 216                                  "WWPN %x:%x:%x:%x:%x:%x:%x:%x "
 217                                  "NPort x%x Data: x%x x%x x%x\n",
 218                                  *name, *(name+1), *(name+2), *(name+3),
 219                                  *(name+4), *(name+5), *(name+6), *(name+7),
 220                                  ndlp->nlp_DID, ndlp->nlp_flag,
 221                                  ndlp->nlp_state, ndlp->nlp_rpi);
 222         }
 223
 224         put_node = rdata->pnode != NULL;
 225         put_rport = ndlp->rport != NULL;
 226         rdata->pnode = NULL;
 227         ndlp->rport = NULL;
 228         if (put_node)
 229                 lpfc_nlp_put(ndlp);
 230         if (put_rport)
 231                 put_device(&rport->dev);
 232
 233         if (!(vport->load_flag & FC_UNLOADING) &&
 234             !(ndlp->nlp_flag & NLP_DELAY_TMO) &&
 235             !(ndlp->nlp_flag & NLP_NPR_2B_DISC) &&
 236             (ndlp->nlp_state != NLP_STE_UNMAPPED_NODE)) {
 237                 lpfc_disc_state_machine(vport, ndlp, NULL, NLP_EVT_DEVICE_RM);
 238         }
 239 }
 240
 241
 242 void
 243 lpfc_worker_wake_up(struct lpfc_hba *phba)
 244 {
 245         wake_up(phba->work_wait);
 246         return;
 247 }
 248
 249 static void
 250 lpfc_work_list_done(struct lpfc_hba *phba)
 251 {
 252         struct lpfc_work_evt  *evtp = NULL;
 253         struct lpfc_nodelist  *ndlp;
 254         int free_evt;
 255
 256         spin_lock_irq(&phba->hbalock);
 257         while (!list_empty(&phba->work_list)) {
 258                 list_remove_head((&phba->work_list), evtp, typeof(*evtp),
 259                                  evt_listp);
 260                 spin_unlock_irq(&phba->hbalock);
 261                 free_evt = 1;
 262                 switch (evtp->evt) {
 263                 case LPFC_EVT_ELS_RETRY:
 264                         ndlp = (struct lpfc_nodelist *) (evtp->evt_arg1);
 265                         lpfc_els_retry_delay_handler(ndlp);
 266                         free_evt = 0; /* evt is part of ndlp */
 267                         break;
 268                 case LPFC_EVT_DEV_LOSS:
 269                         ndlp = (struct lpfc_nodelist *)(evtp->evt_arg1);
 270                         lpfc_nlp_get(ndlp);
 271                         lpfc_dev_loss_tmo_handler(ndlp);
 272                         free_evt = 0;
 273                         lpfc_nlp_put(ndlp);
 274                         break;
 275                 case LPFC_EVT_ONLINE:
 276                         if (phba->link_state < LPFC_LINK_DOWN)
 277                                 *(int *) (evtp->evt_arg1) = lpfc_online(phba);
 278                         else
 279                                 *(int *) (evtp->evt_arg1) = 0;
 280                         complete((struct completion *)(evtp->evt_arg2));
 281                         break;
 282                 case LPFC_EVT_OFFLINE_PREP:
 283                         if (phba->link_state >= LPFC_LINK_DOWN)
 284                                 lpfc_offline_prep(phba);
 285                         *(int *)(evtp->evt_arg1) = 0;
 286                         complete((struct completion *)(evtp->evt_arg2));
 287                         break;
 288                 case LPFC_EVT_OFFLINE:
 289                         lpfc_offline(phba);
 290                         lpfc_sli_brdrestart(phba);
 291                         *(int *)(evtp->evt_arg1) =
 292                                 lpfc_sli_brdready(phba, HS_FFRDY | HS_MBRDY);
 293                         lpfc_unblock_mgmt_io(phba);
 294                         complete((struct completion *)(evtp->evt_arg2));
 295                         break;
 296                 case LPFC_EVT_WARM_START:
 297                         lpfc_offline(phba);
 298                         lpfc_reset_barrier(phba);
 299                         lpfc_sli_brdreset(phba);
 300                         lpfc_hba_down_post(phba);
 301                         *(int *)(evtp->evt_arg1) =
 302                                 lpfc_sli_brdready(phba, HS_MBRDY);
 303                         lpfc_unblock_mgmt_io(phba);
 304                         complete((struct completion *)(evtp->evt_arg2));
 305                         break;
 306                 case LPFC_EVT_KILL:
 307                         lpfc_offline(phba);
 308                         *(int *)(evtp->evt_arg1)
 309                                 = (phba->pport->stopped)
 310                                         ? 0 : lpfc_sli_brdkill(phba);
 311                         lpfc_unblock_mgmt_io(phba);
 312                         complete((struct completion *)(evtp->evt_arg2));
 313                         break;
 314                 }
 315                 if (free_evt)
 316                         kfree(evtp);
 317                 spin_lock_irq(&phba->hbalock);
 318         }
 319         spin_unlock_irq(&phba->hbalock);
 320
 321 }
 322
 323 static void
 324 lpfc_work_done(struct lpfc_hba *phba)
 325 {
 326         struct lpfc_sli_ring *pring;
 327         uint32_t ha_copy, status, control, work_port_events;
 328         struct lpfc_vport **vports;
 329         struct lpfc_vport *vport;
 330         int i;
 331
 332         spin_lock_irq(&phba->hbalock);
 333         ha_copy = phba->work_ha;
 334         phba->work_ha = 0;
 335         spin_unlock_irq(&phba->hbalock);
 336
 337         if (ha_copy & HA_ERATT)
 338                 lpfc_handle_eratt(phba);
 339
 340         if (ha_copy & HA_MBATT)
 341                 lpfc_sli_handle_mb_event(phba);
 342
 343         if (ha_copy & HA_LATT)
 344                 lpfc_handle_latt(phba);
 345         vports = lpfc_create_vport_work_array(phba);
 346         if (vports != NULL)
 347                 for(i = 0; i < LPFC_MAX_VPORTS; i++) {
 348                         /*
 349                          * We could have no vports in array if unloading, so if
 350                          * this happens then just use the pport
 351                          */
 352                         if (vports[i] == NULL && i == 0)
 353                                 vport = phba->pport;
 354                         else
 355                                 vport = vports[i];
 356                         if (vport == NULL)
 357                                 break;
 358                         work_port_events = vport->work_port_events;
 359                         if (work_port_events & WORKER_DISC_TMO)
 360                                 lpfc_disc_timeout_handler(vport);
 361                         if (work_port_events & WORKER_ELS_TMO)
 362                                 lpfc_els_timeout_handler(vport);
 363                         if (work_port_events & WORKER_HB_TMO)
 364                                 lpfc_hb_timeout_handler(phba);
 365                         if (work_port_events & WORKER_MBOX_TMO)
 366                                 lpfc_mbox_timeout_handler(phba);
 367                         if (work_port_events & WORKER_FABRIC_BLOCK_TMO)
 368                                 lpfc_unblock_fabric_iocbs(phba);
 369                         if (work_port_events & WORKER_FDMI_TMO)
 370                                 lpfc_fdmi_timeout_handler(vport);
 371                         if (work_port_events & WORKER_RAMP_DOWN_QUEUE)
 372                                 lpfc_ramp_down_queue_handler(phba);
 373                         if (work_port_events & WORKER_RAMP_UP_QUEUE)
 374                                 lpfc_ramp_up_queue_handler(phba);
 375                         spin_lock_irq(&vport->work_port_lock);
 376                         vport->work_port_events &= ~work_port_events;
 377                         spin_unlock_irq(&vport->work_port_lock);
 378                 }
 379         lpfc_destroy_vport_work_array(vports);
 380
 381         pring = &phba->sli.ring[LPFC_ELS_RING];
 382         status = (ha_copy & (HA_RXMASK  << (4*LPFC_ELS_RING)));
 383         status >>= (4*LPFC_ELS_RING);
 384         if ((status & HA_RXMASK)
 385                 || (pring->flag & LPFC_DEFERRED_RING_EVENT)) {
 386                 if (pring->flag & LPFC_STOP_IOCB_EVENT) {
 387                         pring->flag |= LPFC_DEFERRED_RING_EVENT;
 388                 } else {
 389                         lpfc_sli_handle_slow_ring_event(phba, pring,
 390                                                         (status &
 391                                                          HA_RXMASK));
 392                         pring->flag &= ~LPFC_DEFERRED_RING_EVENT;
 393                 }
 394                 /*
 395                  * Turn on Ring interrupts
 396                  */
 397                 spin_lock_irq(&phba->hbalock);
 398                 control = readl(phba->HCregaddr);
 399                 if (!(control & (HC_R0INT_ENA << LPFC_ELS_RING))) {
 400                         lpfc_debugfs_slow_ring_trc(phba,
 401                                 "WRK Enable ring: cntl:x%x hacopy:x%x",
 402                                 control, ha_copy, 0);
 403
 404                         control |= (HC_R0INT_ENA << LPFC_ELS_RING);
 405                         writel(control, phba->HCregaddr);
 406                         readl(phba->HCregaddr); /* flush */
 407                 }
 408                 else {
 409                         lpfc_debugfs_slow_ring_trc(phba,
 410                                 "WRK Ring ok:     cntl:x%x hacopy:x%x",
 411                                 control, ha_copy, 0);
 412                 }
 413                 spin_unlock_irq(&phba->hbalock);
 414         }
 415         lpfc_work_list_done(phba);
 416 }
 417
 418 static int
 419 check_work_wait_done(struct lpfc_hba *phba)
 420 {
 421         struct lpfc_vport *vport;
 422         struct lpfc_sli_ring *pring = &phba->sli.ring[LPFC_ELS_RING];
 423         int rc = 0;
 424
 425         spin_lock_irq(&phba->hbalock);
 426         list_for_each_entry(vport, &phba->port_list, listentry) {
 427                 if (vport->work_port_events) {
 428                         rc = 1;
 429                         break;
 430                 }
 431         }
 432         if (rc || phba->work_ha || (!list_empty(&phba->work_list)) ||
 433             kthread_should_stop() || pring->flag & LPFC_DEFERRED_RING_EVENT) {
 434                 rc = 1;
 435                 phba->work_found++;
 436         } else
 437                 phba->work_found = 0;
 438         spin_unlock_irq(&phba->hbalock);
 439         return rc;
 440 }
 441
 442
 443 int
 444 lpfc_do_work(void *p)
 445 {
 446         struct lpfc_hba *phba = p;
 447         int rc;
 448         DECLARE_WAIT_QUEUE_HEAD_ONSTACK(work_waitq);
 449
 450         set_user_nice(current, -20);
 451         phba->work_wait = &work_waitq;
 452         phba->work_found = 0;
 453
 454         while (1) {
 455
 456                 rc = wait_event_interruptible(work_waitq,
 457                                               check_work_wait_done(phba));
 458
 459                 BUG_ON(rc);
 460
 461                 if (kthread_should_stop())
 462                         break;
 463
 464                 lpfc_work_done(phba);
 465
 466                 /* If there is alot of slow ring work, like during link up
 467                  * check_work_wait_done() may cause this thread to not give
 468                  * up the CPU for very long periods of time. This may cause
 469                  * soft lockups or other problems. To avoid these situations
 470                  * give up the CPU here after LPFC_MAX_WORKER_ITERATION
 471                  * consecutive iterations.
 472                  */
 473                 if (phba->work_found >= LPFC_MAX_WORKER_ITERATION) {
 474                         phba->work_found = 0;
 475                         schedule();
 476                 }
 477         }
 478         phba->work_wait = NULL;
 479         return 0;
 480 }
 481
 482 /*
 483  * This is only called to handle FC worker events. Since this a rare
 484  * occurance, we allocate a struct lpfc_work_evt structure here instead of
 485  * embedding it in the IOCB.
 486  */
 487 int
 488 lpfc_workq_post_event(struct lpfc_hba *phba, void *arg1, void *arg2,
 489                       uint32_t evt)
 490 {
 491         struct lpfc_work_evt  *evtp;
 492         unsigned long flags;
 493
 494         /*
 495          * All Mailbox completions and LPFC_ELS_RING rcv ring IOCB events will
 496          * be queued to worker thread for processing
 497          */
 498         evtp = kmalloc(sizeof(struct lpfc_work_evt), GFP_ATOMIC);
 499         if (!evtp)
 500                 return 0;
 501
 502         evtp->evt_arg1  = arg1;
 503         evtp->evt_arg2  = arg2;
 504         evtp->evt       = evt;
 505
 506         spin_lock_irqsave(&phba->hbalock, flags);
 507         list_add_tail(&evtp->evt_listp, &phba->work_list);
 508         if (phba->work_wait)
 509                 lpfc_worker_wake_up(phba);
 510         spin_unlock_irqrestore(&phba->hbalock, flags);
 511
 512         return 1;
 513 }
 514
 515 void
 516 lpfc_cleanup_rpis(struct lpfc_vport *vport, int remove)
 517 {
 518         struct lpfc_hba  *phba = vport->phba;
 519         struct lpfc_nodelist *ndlp, *next_ndlp;
 520         int  rc;
 521
 522         list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) {
 523                 if (ndlp->nlp_state == NLP_STE_UNUSED_NODE)
 524                         continue;
 525
 526                 if ((phba->sli3_options & LPFC_SLI3_VPORT_TEARDOWN) ||
 527                         ((vport->port_type == LPFC_NPIV_PORT) &&
 528                         (ndlp->nlp_DID == NameServer_DID)))
 529                         lpfc_unreg_rpi(vport, ndlp);
 530
 531                 /* Leave Fabric nodes alone on link down */
 532                 if (!remove && ndlp->nlp_type & NLP_FABRIC)
 533                         continue;
 534                 rc = lpfc_disc_state_machine(vport, ndlp, NULL,
 535                                              remove
 536                                              ? NLP_EVT_DEVICE_RM
 537                                              : NLP_EVT_DEVICE_RECOVERY);
 538         }
 539         if (phba->sli3_options & LPFC_SLI3_VPORT_TEARDOWN) {
 540                 lpfc_mbx_unreg_vpi(vport);
 541                 vport->fc_flag |= FC_VPORT_NEEDS_REG_VPI;
 542         }
 543 }
 544
 545 void
 546 lpfc_port_link_failure(struct lpfc_vport *vport)
 547 {
 548         /* Cleanup any outstanding RSCN activity */
 549         lpfc_els_flush_rscn(vport);
 550
 551         /* Cleanup any outstanding ELS commands */
 552         lpfc_els_flush_cmd(vport);
 553
 554         lpfc_cleanup_rpis(vport, 0);
 555
 556         /* Turn off discovery timer if its running */
 557         lpfc_can_disctmo(vport);
 558 }
 559
 560 static void
 561 lpfc_linkdown_port(struct lpfc_vport *vport)
 562 {
 563         struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
 564
 565         fc_host_post_event(shost, fc_get_event_number(), FCH_EVT_LINKDOWN, 0);
 566
 567         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
 568                 "Link Down:       state:x%x rtry:x%x flg:x%x",
 569                 vport->port_state, vport->fc_ns_retry, vport->fc_flag);
 570
 571         lpfc_port_link_failure(vport);
 572
 573 }
 574
 575 int
 576 lpfc_linkdown(struct lpfc_hba *phba)
 577 {
 578         struct lpfc_vport *vport = phba->pport;
 579         struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
 580         struct lpfc_vport **vports;
 581         LPFC_MBOXQ_t          *mb;
 582         int i;
 583
 584         if (phba->link_state == LPFC_LINK_DOWN) {
 585                 return 0;
 586         }
 587         spin_lock_irq(&phba->hbalock);
 588         if (phba->link_state > LPFC_LINK_DOWN) {
 589                 phba->link_state = LPFC_LINK_DOWN;
 590                 phba->pport->fc_flag &= ~FC_LBIT;
 591         }
 592         spin_unlock_irq(&phba->hbalock);
 593         vports = lpfc_create_vport_work_array(phba);
 594         if (vports != NULL)
 595                 for(i = 0; i < LPFC_MAX_VPORTS && vports[i] != NULL; i++) {
 596                         /* Issue a LINK DOWN event to all nodes */
 597                         lpfc_linkdown_port(vports[i]);
 598                 }
 599         lpfc_destroy_vport_work_array(vports);
 600         /* Clean up any firmware default rpi's */
 601         mb = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
 602         if (mb) {
 603                 lpfc_unreg_did(phba, 0xffff, 0xffffffff, mb);
 604                 mb->vport = vport;
 605                 mb->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
 606                 if (lpfc_sli_issue_mbox(phba, mb, MBX_NOWAIT)
 607                     == MBX_NOT_FINISHED) {
 608                         mempool_free(mb, phba->mbox_mem_pool);
 609                 }
 610         }
 611
 612         /* Setup myDID for link up if we are in pt2pt mode */
 613         if (phba->pport->fc_flag & FC_PT2PT) {
 614                 phba->pport->fc_myDID = 0;
 615                 mb = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
 616                 if (mb) {
 617                         lpfc_config_link(phba, mb);
 618                         mb->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
 619                         mb->vport = vport;
 620                         if (lpfc_sli_issue_mbox(phba, mb, MBX_NOWAIT)
 621                             == MBX_NOT_FINISHED) {
 622                                 mempool_free(mb, phba->mbox_mem_pool);
 623                         }
 624                 }
 625                 spin_lock_irq(shost->host_lock);
 626                 phba->pport->fc_flag &= ~(FC_PT2PT | FC_PT2PT_PLOGI);
 627                 spin_unlock_irq(shost->host_lock);
 628         }
 629
 630         return 0;
 631 }
 632
 633 static void
 634 lpfc_linkup_cleanup_nodes(struct lpfc_vport *vport)
 635 {
 636         struct lpfc_nodelist *ndlp;
 637
 638         list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
 639                 if (ndlp->nlp_state == NLP_STE_UNUSED_NODE)
 640                         continue;
 641
 642                 if (ndlp->nlp_type & NLP_FABRIC) {
 643                                 /* On Linkup its safe to clean up the ndlp
 644                                  * from Fabric connections.
 645                                  */
 646                         if (ndlp->nlp_DID != Fabric_DID)
 647                                 lpfc_unreg_rpi(vport, ndlp);
 648                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
 649                 } else if (!(ndlp->nlp_flag & NLP_NPR_ADISC)) {
 650                                 /* Fail outstanding IO now since device is
 651                                  * marked for PLOGI.
 652                                  */
 653                         lpfc_unreg_rpi(vport, ndlp);
 654                 }
 655         }
 656 }
 657
 658 static void
 659 lpfc_linkup_port(struct lpfc_vport *vport)
 660 {
 661         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
 662         struct lpfc_hba  *phba = vport->phba;
 663
 664         if ((vport->load_flag & FC_UNLOADING) != 0)
 665                 return;
 666
 667         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
 668                 "Link Up:         top:x%x speed:x%x flg:x%x",
 669                 phba->fc_topology, phba->fc_linkspeed, phba->link_flag);
 670
 671         /* If NPIV is not enabled, only bring the physical port up */
 672         if (!(phba->sli3_options & LPFC_SLI3_NPIV_ENABLED) &&
 673                 (vport != phba->pport))
 674                 return;
 675
 676         fc_host_post_event(shost, fc_get_event_number(), FCH_EVT_LINKUP, 0);
 677
 678         spin_lock_irq(shost->host_lock);
 679         vport->fc_flag &= ~(FC_PT2PT | FC_PT2PT_PLOGI | FC_ABORT_DISCOVERY |
 680                             FC_RSCN_MODE | FC_NLP_MORE | FC_RSCN_DISCOVERY);
 681         vport->fc_flag |= FC_NDISC_ACTIVE;
 682         vport->fc_ns_retry = 0;
 683         spin_unlock_irq(shost->host_lock);
 684
 685         if (vport->fc_flag & FC_LBIT)
 686                 lpfc_linkup_cleanup_nodes(vport);
 687
 688 }
 689
 690 static int
 691 lpfc_linkup(struct lpfc_hba *phba)
 692 {
 693         struct lpfc_vport **vports;
 694         int i;
 695
 696         phba->link_state = LPFC_LINK_UP;
 697
 698         /* Unblock fabric iocbs if they are blocked */
 699         clear_bit(FABRIC_COMANDS_BLOCKED, &phba->bit_flags);
 700         del_timer_sync(&phba->fabric_block_timer);
 701
 702         vports = lpfc_create_vport_work_array(phba);
 703         if (vports != NULL)
 704                 for(i = 0; i < LPFC_MAX_VPORTS && vports[i] != NULL; i++)
 705                         lpfc_linkup_port(vports[i]);
 706         lpfc_destroy_vport_work_array(vports);
 707         if (phba->sli3_options & LPFC_SLI3_NPIV_ENABLED)
 708                 lpfc_issue_clear_la(phba, phba->pport);
 709
 710         return 0;
 711 }
 712
 713 /*
 714  * This routine handles processing a CLEAR_LA mailbox
 715  * command upon completion. It is setup in the LPFC_MBOXQ
 716  * as the completion routine when the command is
 717  * handed off to the SLI layer.
 718  */
 719 void
 720 lpfc_mbx_cmpl_clear_la(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
 721 {
 722         struct lpfc_vport *vport = pmb->vport;
 723         struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
 724         struct lpfc_sli   *psli = &phba->sli;
 725         MAILBOX_t *mb = &pmb->mb;
 726         uint32_t control;
 727
 728         /* Since we don't do discovery right now, turn these off here */
 729         psli->ring[psli->extra_ring].flag &= ~LPFC_STOP_IOCB_EVENT;
 730         psli->ring[psli->fcp_ring].flag &= ~LPFC_STOP_IOCB_EVENT;
 731         psli->ring[psli->next_ring].flag &= ~LPFC_STOP_IOCB_EVENT;
 732
 733         /* Check for error */
 734         if ((mb->mbxStatus) && (mb->mbxStatus != 0x1601)) {
 735                 /* CLEAR_LA mbox error <mbxStatus> state <hba_state> */
 736                 lpfc_printf_vlog(vport, KERN_ERR, LOG_MBOX,
 737                                  "0320 CLEAR_LA mbxStatus error x%x hba "
 738                                  "state x%x\n",
 739                                  mb->mbxStatus, vport->port_state);
 740                 phba->link_state = LPFC_HBA_ERROR;
 741                 goto out;
 742         }
 743
 744         if (vport->port_type == LPFC_PHYSICAL_PORT)
 745                 phba->link_state = LPFC_HBA_READY;
 746
 747         spin_lock_irq(&phba->hbalock);
 748         psli->sli_flag |= LPFC_PROCESS_LA;
 749         control = readl(phba->HCregaddr);
 750         control |= HC_LAINT_ENA;
 751         writel(control, phba->HCregaddr);
 752         readl(phba->HCregaddr); /* flush */
 753         spin_unlock_irq(&phba->hbalock);
 754         return;
 755
 756         vport->num_disc_nodes = 0;
 757         /* go thru NPR nodes and issue ELS PLOGIs */
 758         if (vport->fc_npr_cnt)
 759                 lpfc_els_disc_plogi(vport);
 760
 761         if (!vport->num_disc_nodes) {
 762                 spin_lock_irq(shost->host_lock);
 763                 vport->fc_flag &= ~FC_NDISC_ACTIVE;
 764                 spin_unlock_irq(shost->host_lock);
 765         }
 766
 767         vport->port_state = LPFC_VPORT_READY;
 768
 769 out:
 770         /* Device Discovery completes */
 771         lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
 772                          "0225 Device Discovery completes\n");
 773         mempool_free(pmb, phba->mbox_mem_pool);
 774
 775         spin_lock_irq(shost->host_lock);
 776         vport->fc_flag &= ~(FC_ABORT_DISCOVERY | FC_ESTABLISH_LINK);
 777         spin_unlock_irq(shost->host_lock);
 778
 779         del_timer_sync(&phba->fc_estabtmo);
 780
 781         lpfc_can_disctmo(vport);
 782
 783         /* turn on Link Attention interrupts */
 784
 785         spin_lock_irq(&phba->hbalock);
 786         psli->sli_flag |= LPFC_PROCESS_LA;
 787         control = readl(phba->HCregaddr);
 788         control |= HC_LAINT_ENA;
 789         writel(control, phba->HCregaddr);
 790         readl(phba->HCregaddr); /* flush */
 791         spin_unlock_irq(&phba->hbalock);
 792
 793         return;
 794 }
 795
 796
 797 static void
 798 lpfc_mbx_cmpl_local_config_link(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
 799 {
 800         struct lpfc_vport *vport = pmb->vport;
 801
 802         if (pmb->mb.mbxStatus)
 803                 goto out;
 804
 805         mempool_free(pmb, phba->mbox_mem_pool);
 806
 807         if (phba->fc_topology == TOPOLOGY_LOOP &&
 808             vport->fc_flag & FC_PUBLIC_LOOP &&
 809             !(vport->fc_flag & FC_LBIT)) {
 810                         /* Need to wait for FAN - use discovery timer
 811                          * for timeout.  port_state is identically
 812                          * LPFC_LOCAL_CFG_LINK while waiting for FAN
 813                          */
 814                         lpfc_set_disctmo(vport);
 815                         return;
 816         }
 817
 818         /* Start discovery by sending a FLOGI. port_state is identically
 819          * LPFC_FLOGI while waiting for FLOGI cmpl
 820          */
 821         if (vport->port_state != LPFC_FLOGI) {
 822                 lpfc_initial_flogi(vport);
 823         }
 824         return;
 825
 826 out:
 827         lpfc_printf_vlog(vport, KERN_ERR, LOG_MBOX,
 828                          "0306 CONFIG_LINK mbxStatus error x%x "
 829                          "HBA state x%x\n",
 830                          pmb->mb.mbxStatus, vport->port_state);
 831         mempool_free(pmb, phba->mbox_mem_pool);
 832
 833         lpfc_linkdown(phba);
 834
 835         lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
 836                          "0200 CONFIG_LINK bad hba state x%x\n",
 837                          vport->port_state);
 838
 839         lpfc_issue_clear_la(phba, vport);
 840         return;
 841 }
 842
 843 static void
 844 lpfc_mbx_cmpl_read_sparam(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
 845 {
 846         MAILBOX_t *mb = &pmb->mb;
 847         struct lpfc_dmabuf *mp = (struct lpfc_dmabuf *) pmb->context1;
 848         struct lpfc_vport  *vport = pmb->vport;
 849
 850
 851         /* Check for error */
 852         if (mb->mbxStatus) {
 853                 /* READ_SPARAM mbox error <mbxStatus> state <hba_state> */
 854                 lpfc_printf_vlog(vport, KERN_ERR, LOG_MBOX,
 855                                  "0319 READ_SPARAM mbxStatus error x%x "
 856                                  "hba state x%x>\n",
 857                                  mb->mbxStatus, vport->port_state);
 858                 lpfc_linkdown(phba);
 859                 goto out;
 860         }
 861
 862         memcpy((uint8_t *) &vport->fc_sparam, (uint8_t *) mp->virt,
 863                sizeof (struct serv_parm));
 864         if (phba->cfg_soft_wwnn)
 865                 u64_to_wwn(phba->cfg_soft_wwnn,
 866                            vport->fc_sparam.nodeName.u.wwn);
 867         if (phba->cfg_soft_wwpn)
 868                 u64_to_wwn(phba->cfg_soft_wwpn,
 869                            vport->fc_sparam.portName.u.wwn);
 870         memcpy(&vport->fc_nodename, &vport->fc_sparam.nodeName,
 871                sizeof(vport->fc_nodename));
 872         memcpy(&vport->fc_portname, &vport->fc_sparam.portName,
 873                sizeof(vport->fc_portname));
 874         if (vport->port_type == LPFC_PHYSICAL_PORT) {
 875                 memcpy(&phba->wwnn, &vport->fc_nodename, sizeof(phba->wwnn));
 876                 memcpy(&phba->wwpn, &vport->fc_portname, sizeof(phba->wwnn));
 877         }
 878
 879         lpfc_mbuf_free(phba, mp->virt, mp->phys);
 880         kfree(mp);
 881         mempool_free(pmb, phba->mbox_mem_pool);
 882         return;
 883
 884 out:
 885         pmb->context1 = NULL;
 886         lpfc_mbuf_free(phba, mp->virt, mp->phys);
 887         kfree(mp);
 888         lpfc_issue_clear_la(phba, vport);
 889         mempool_free(pmb, phba->mbox_mem_pool);
 890         return;
 891 }
 892
 893 static void
 894 lpfc_mbx_process_link_up(struct lpfc_hba *phba, READ_LA_VAR *la)
 895 {
 896         struct lpfc_vport *vport = phba->pport;
 897         LPFC_MBOXQ_t *sparam_mbox, *cfglink_mbox;
 898         int i;
 899         struct lpfc_dmabuf *mp;
 900         int rc;
 901
 902         sparam_mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
 903         cfglink_mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
 904
 905         spin_lock_irq(&phba->hbalock);
 906         switch (la->UlnkSpeed) {
 907         case LA_1GHZ_LINK:
 908                 phba->fc_linkspeed = LA_1GHZ_LINK;
 909                 break;
 910         case LA_2GHZ_LINK:
 911                 phba->fc_linkspeed = LA_2GHZ_LINK;
 912                 break;
 913         case LA_4GHZ_LINK:
 914                 phba->fc_linkspeed = LA_4GHZ_LINK;
 915                 break;
 916         case LA_8GHZ_LINK:
 917                 phba->fc_linkspeed = LA_8GHZ_LINK;
 918                 break;
 919         default:
 920                 phba->fc_linkspeed = LA_UNKNW_LINK;
 921                 break;
 922         }
 923
 924         phba->fc_topology = la->topology;
 925         phba->link_flag &= ~LS_NPIV_FAB_SUPPORTED;
 926
 927         if (phba->fc_topology == TOPOLOGY_LOOP) {
 928                 phba->sli3_options &= ~LPFC_SLI3_NPIV_ENABLED;
 929
 930                                 /* Get Loop Map information */
 931                 if (la->il)
 932                         vport->fc_flag |= FC_LBIT;
 933
 934                 vport->fc_myDID = la->granted_AL_PA;
 935                 i = la->un.lilpBde64.tus.f.bdeSize;
 936
 937                 if (i == 0) {
 938                         phba->alpa_map[0] = 0;
 939                 } else {
 940                         if (vport->cfg_log_verbose & LOG_LINK_EVENT) {
 941                                 int numalpa, j, k;
 942                                 union {
 943                                         uint8_t pamap[16];
 944                                         struct {
 945                                                 uint32_t wd1;
 946                                                 uint32_t wd2;
 947                                                 uint32_t wd3;
 948                                                 uint32_t wd4;
 949                                         } pa;
 950                                 } un;
 951                                 numalpa = phba->alpa_map[0];
 952                                 j = 0;
 953                                 while (j < numalpa) {
 954                                         memset(un.pamap, 0, 16);
 955                                         for (k = 1; j < numalpa; k++) {
 956                                                 un.pamap[k - 1] =
 957                                                         phba->alpa_map[j + 1];
 958                                                 j++;
 959                                                 if (k == 16)
 960                                                         break;
 961                                         }
 962                                         /* Link Up Event ALPA map */
 963                                         lpfc_printf_log(phba,
 964                                                         KERN_WARNING,
 965                                                         LOG_LINK_EVENT,
 966                                                         "1304 Link Up Event "
 967                                                         "ALPA map Data: x%x "
 968                                                         "x%x x%x x%x\n",
 969                                                         un.pa.wd1, un.pa.wd2,
 970                                                         un.pa.wd3, un.pa.wd4);
 971                                 }
 972                         }
 973                 }
 974         } else {
 975                 if (!(phba->sli3_options & LPFC_SLI3_NPIV_ENABLED)) {
 976                         if (phba->max_vpi && phba->cfg_enable_npiv &&
 977                            (phba->sli_rev == 3))
 978                                 phba->sli3_options |= LPFC_SLI3_NPIV_ENABLED;
 979                 }
 980                 vport->fc_myDID = phba->fc_pref_DID;
 981                 vport->fc_flag |= FC_LBIT;
 982         }
 983         spin_unlock_irq(&phba->hbalock);
 984
 985         lpfc_linkup(phba);
 986         if (sparam_mbox) {
 987                 lpfc_read_sparam(phba, sparam_mbox, 0);
 988                 sparam_mbox->vport = vport;
 989                 sparam_mbox->mbox_cmpl = lpfc_mbx_cmpl_read_sparam;
 990                 rc = lpfc_sli_issue_mbox(phba, sparam_mbox, MBX_NOWAIT);
 991                 if (rc == MBX_NOT_FINISHED) {
 992                         mp = (struct lpfc_dmabuf *) sparam_mbox->context1;
 993                         lpfc_mbuf_free(phba, mp->virt, mp->phys);
 994                         kfree(mp);
 995                         mempool_free(sparam_mbox, phba->mbox_mem_pool);
 996                         if (cfglink_mbox)
 997                                 mempool_free(cfglink_mbox, phba->mbox_mem_pool);
 998                         goto out;
 999                 }
1000         }
1001
1002         if (cfglink_mbox) {
1003                 vport->port_state = LPFC_LOCAL_CFG_LINK;
1004                 lpfc_config_link(phba, cfglink_mbox);
1005                 cfglink_mbox->vport = vport;
1006                 cfglink_mbox->mbox_cmpl = lpfc_mbx_cmpl_local_config_link;
1007                 rc = lpfc_sli_issue_mbox(phba, cfglink_mbox, MBX_NOWAIT);
1008                 if (rc != MBX_NOT_FINISHED)
1009                         return;
1010                 mempool_free(cfglink_mbox, phba->mbox_mem_pool);
1011         }
1012 out:
1013         lpfc_vport_set_state(vport, FC_VPORT_FAILED);
1014         lpfc_printf_vlog(vport, KERN_ERR, LOG_MBOX,
1015                          "0263 Discovery Mailbox error: state: 0x%x : %p %p\n",
1016                          vport->port_state, sparam_mbox, cfglink_mbox);
1017         lpfc_issue_clear_la(phba, vport);
1018         return;
1019 }
1020
1021 static void
1022 lpfc_mbx_issue_link_down(struct lpfc_hba *phba)
1023 {
1024         uint32_t control;
1025         struct lpfc_sli *psli = &phba->sli;
1026
1027         lpfc_linkdown(phba);
1028
1029         /* turn on Link Attention interrupts - no CLEAR_LA needed */
1030         spin_lock_irq(&phba->hbalock);
1031         psli->sli_flag |= LPFC_PROCESS_LA;
1032         control = readl(phba->HCregaddr);
1033         control |= HC_LAINT_ENA;
1034         writel(control, phba->HCregaddr);
1035         readl(phba->HCregaddr); /* flush */
1036         spin_unlock_irq(&phba->hbalock);
1037 }
1038
1039 /*
1040  * This routine handles processing a READ_LA mailbox
1041  * command upon completion. It is setup in the LPFC_MBOXQ
1042  * as the completion routine when the command is
1043  * handed off to the SLI layer.
1044  */
1045 void
1046 lpfc_mbx_cmpl_read_la(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
1047 {
1048         struct lpfc_vport *vport = pmb->vport;
1049         struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
1050         READ_LA_VAR *la;
1051         MAILBOX_t *mb = &pmb->mb;
1052         struct lpfc_dmabuf *mp = (struct lpfc_dmabuf *) (pmb->context1);
1053
1054         /* Check for error */
1055         if (mb->mbxStatus) {
1056                 lpfc_printf_log(phba, KERN_INFO, LOG_LINK_EVENT,
1057                                 "1307 READ_LA mbox error x%x state x%x\n",
1058                                 mb->mbxStatus, vport->port_state);
1059                 lpfc_mbx_issue_link_down(phba);
1060                 phba->link_state = LPFC_HBA_ERROR;
1061                 goto lpfc_mbx_cmpl_read_la_free_mbuf;
1062         }
1063
1064         la = (READ_LA_VAR *) & pmb->mb.un.varReadLA;
1065
1066         memcpy(&phba->alpa_map[0], mp->virt, 128);
1067
1068         spin_lock_irq(shost->host_lock);
1069         if (la->pb)
1070                 vport->fc_flag |= FC_BYPASSED_MODE;
1071         else
1072                 vport->fc_flag &= ~FC_BYPASSED_MODE;
1073         spin_unlock_irq(shost->host_lock);
1074
1075         if (((phba->fc_eventTag + 1) < la->eventTag) ||
1076             (phba->fc_eventTag == la->eventTag)) {
1077                 phba->fc_stat.LinkMultiEvent++;
1078                 if (la->attType == AT_LINK_UP)
1079                         if (phba->fc_eventTag != 0)
1080                                 lpfc_linkdown(phba);
1081         }
1082
1083         phba->fc_eventTag = la->eventTag;
1084
1085         if (la->attType == AT_LINK_UP) {
1086                 phba->fc_stat.LinkUp++;
1087                 if (phba->link_flag & LS_LOOPBACK_MODE) {
1088                         lpfc_printf_log(phba, KERN_INFO, LOG_LINK_EVENT,
1089                                         "1306 Link Up Event in loop back mode "
1090                                         "x%x received Data: x%x x%x x%x x%x\n",
1091                                         la->eventTag, phba->fc_eventTag,
1092                                         la->granted_AL_PA, la->UlnkSpeed,
1093                                         phba->alpa_map[0]);
1094                 } else {
1095                         lpfc_printf_log(phba, KERN_ERR, LOG_LINK_EVENT,
1096                                         "1303 Link Up Event x%x received "
1097                                         "Data: x%x x%x x%x x%x\n",
1098                                         la->eventTag, phba->fc_eventTag,
1099                                         la->granted_AL_PA, la->UlnkSpeed,
1100                                         phba->alpa_map[0]);
1101                 }
1102                 lpfc_mbx_process_link_up(phba, la);
1103         } else {
1104                 phba->fc_stat.LinkDown++;
1105                 lpfc_printf_log(phba, KERN_ERR, LOG_LINK_EVENT,
1106                                 "1305 Link Down Event x%x received "
1107                                 "Data: x%x x%x x%x\n",
1108                                 la->eventTag, phba->fc_eventTag,
1109                                 phba->pport->port_state, vport->fc_flag);
1110                 lpfc_mbx_issue_link_down(phba);
1111         }
1112
1113 lpfc_mbx_cmpl_read_la_free_mbuf:
1114         lpfc_mbuf_free(phba, mp->virt, mp->phys);
1115         kfree(mp);
1116         mempool_free(pmb, phba->mbox_mem_pool);
1117         return;
1118 }
1119
1120 /*
1121  * This routine handles processing a REG_LOGIN mailbox
1122  * command upon completion. It is setup in the LPFC_MBOXQ
1123  * as the completion routine when the command is
1124  * handed off to the SLI layer.
1125  */
1126 void
1127 lpfc_mbx_cmpl_reg_login(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
1128 {
1129         struct lpfc_vport  *vport = pmb->vport;
1130         struct lpfc_dmabuf *mp = (struct lpfc_dmabuf *) (pmb->context1);
1131         struct lpfc_nodelist *ndlp = (struct lpfc_nodelist *) pmb->context2;
1132
1133         pmb->context1 = NULL;
1134
1135         /* Good status, call state machine */
1136         lpfc_disc_state_machine(vport, ndlp, pmb, NLP_EVT_CMPL_REG_LOGIN);
1137         lpfc_mbuf_free(phba, mp->virt, mp->phys);
1138         kfree(mp);
1139         mempool_free(pmb, phba->mbox_mem_pool);
1140         lpfc_nlp_put(ndlp);
1141
1142         return;
1143 }
1144
1145 static void
1146 lpfc_mbx_cmpl_unreg_vpi(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
1147 {
1148         MAILBOX_t *mb = &pmb->mb;
1149         struct lpfc_vport *vport = pmb->vport;
1150         struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
1151
1152         switch (mb->mbxStatus) {
1153         case 0x0011:
1154         case 0x0020:
1155         case 0x9700:
1156                 lpfc_printf_vlog(vport, KERN_INFO, LOG_NODE,
1157                                  "0911 cmpl_unreg_vpi, mb status = 0x%x\n",
1158                                  mb->mbxStatus);
1159                 break;
1160         }
1161         vport->unreg_vpi_cmpl = VPORT_OK;
1162         mempool_free(pmb, phba->mbox_mem_pool);
1163         /*
1164          * This shost reference might have been taken at the beginning of
1165          * lpfc_vport_delete()
1166          */
1167         if (vport->load_flag & FC_UNLOADING)
1168                 scsi_host_put(shost);
1169 }
1170
1171 void
1172 lpfc_mbx_unreg_vpi(struct lpfc_vport *vport)
1173 {
1174         struct lpfc_hba  *phba = vport->phba;
1175         LPFC_MBOXQ_t *mbox;
1176         int rc;
1177
1178         mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
1179         if (!mbox)
1180                 return;
1181
1182         lpfc_unreg_vpi(phba, vport->vpi, mbox);
1183         mbox->vport = vport;
1184         mbox->mbox_cmpl = lpfc_mbx_cmpl_unreg_vpi;
1185         rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
1186         if (rc == MBX_NOT_FINISHED) {
1187                 lpfc_printf_vlog(vport, KERN_ERR, LOG_MBOX | LOG_VPORT,
1188                                  "1800 Could not issue unreg_vpi\n");
1189                 mempool_free(mbox, phba->mbox_mem_pool);
1190                 vport->unreg_vpi_cmpl = VPORT_ERROR;
1191         }
1192 }
1193
1194 static void
1195 lpfc_mbx_cmpl_reg_vpi(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
1196 {
1197         struct lpfc_vport *vport = pmb->vport;
1198         struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
1199         MAILBOX_t *mb = &pmb->mb;
1200
1201         switch (mb->mbxStatus) {
1202         case 0x0011:
1203         case 0x9601:
1204         case 0x9602:
1205                 lpfc_printf_vlog(vport, KERN_INFO, LOG_NODE,
1206                                  "0912 cmpl_reg_vpi, mb status = 0x%x\n",
1207                                  mb->mbxStatus);
1208                 lpfc_vport_set_state(vport, FC_VPORT_FAILED);
1209                 spin_lock_irq(shost->host_lock);
1210                 vport->fc_flag &= ~(FC_FABRIC | FC_PUBLIC_LOOP);
1211                 spin_unlock_irq(shost->host_lock);
1212                 vport->fc_myDID = 0;
1213                 goto out;
1214         }
1215
1216         vport->num_disc_nodes = 0;
1217         /* go thru NPR list and issue ELS PLOGIs */
1218         if (vport->fc_npr_cnt)
1219                 lpfc_els_disc_plogi(vport);
1220
1221         if (!vport->num_disc_nodes) {
1222                 spin_lock_irq(shost->host_lock);
1223                 vport->fc_flag &= ~FC_NDISC_ACTIVE;
1224                 spin_unlock_irq(shost->host_lock);
1225                 lpfc_can_disctmo(vport);
1226         }
1227         vport->port_state = LPFC_VPORT_READY;
1228
1229 out:
1230         mempool_free(pmb, phba->mbox_mem_pool);
1231         return;
1232 }
1233
1234 /*
1235  * This routine handles processing a Fabric REG_LOGIN mailbox
1236  * command upon completion. It is setup in the LPFC_MBOXQ
1237  * as the completion routine when the command is
1238  * handed off to the SLI layer.
1239  */
1240 void
1241 lpfc_mbx_cmpl_fabric_reg_login(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
1242 {
1243         struct lpfc_vport *vport = pmb->vport;
1244         MAILBOX_t *mb = &pmb->mb;
1245         struct lpfc_dmabuf *mp = (struct lpfc_dmabuf *) (pmb->context1);
1246         struct lpfc_nodelist *ndlp;
1247         struct lpfc_vport **vports;
1248         int i;
1249
1250         ndlp = (struct lpfc_nodelist *) pmb->context2;
1251         pmb->context1 = NULL;
1252         pmb->context2 = NULL;
1253         if (mb->mbxStatus) {
1254                 lpfc_mbuf_free(phba, mp->virt, mp->phys);
1255                 kfree(mp);
1256                 mempool_free(pmb, phba->mbox_mem_pool);
1257                 lpfc_nlp_put(ndlp);
1258
1259                 if (phba->fc_topology == TOPOLOGY_LOOP) {
1260                         /* FLOGI failed, use loop map to make discovery list */
1261                         lpfc_disc_list_loopmap(vport);
1262
1263                         /* Start discovery */
1264                         lpfc_disc_start(vport);
1265                         return;
1266                 }
1267
1268                 lpfc_vport_set_state(vport, FC_VPORT_FAILED);
1269                 lpfc_printf_vlog(vport, KERN_ERR, LOG_MBOX,
1270                                  "0258 Register Fabric login error: 0x%x\n",
1271                                  mb->mbxStatus);
1272                 return;
1273         }
1274
1275         ndlp->nlp_rpi = mb->un.varWords[0];
1276         ndlp->nlp_type |= NLP_FABRIC;
1277         lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
1278
1279         lpfc_nlp_put(ndlp);     /* Drop the reference from the mbox */
1280
1281         if (vport->port_state == LPFC_FABRIC_CFG_LINK) {
1282                 vports = lpfc_create_vport_work_array(phba);
1283                 if (vports != NULL)
1284                         for(i = 0;
1285                             i < LPFC_MAX_VPORTS && vports[i] != NULL;
1286                             i++) {
1287                                 if (vports[i]->port_type == LPFC_PHYSICAL_PORT)
1288                                         continue;
1289                                 if (phba->link_flag & LS_NPIV_FAB_SUPPORTED)
1290                                         lpfc_initial_fdisc(vports[i]);
1291                                 else if (phba->sli3_options &
1292                                                 LPFC_SLI3_NPIV_ENABLED) {
1293                                         lpfc_vport_set_state(vports[i],
1294                                                 FC_VPORT_NO_FABRIC_SUPP);
1295                                         lpfc_printf_vlog(vport, KERN_ERR,
1296                                                          LOG_ELS,
1297                                                         "0259 No NPIV "
1298                                                         "Fabric support\n");
1299                                 }
1300                         }
1301                 lpfc_destroy_vport_work_array(vports);
1302                 lpfc_do_scr_ns_plogi(phba, vport);
1303         }
1304
1305         lpfc_mbuf_free(phba, mp->virt, mp->phys);
1306         kfree(mp);
1307         mempool_free(pmb, phba->mbox_mem_pool);
1308         return;
1309 }
1310
1311 /*
1312  * This routine handles processing a NameServer REG_LOGIN mailbox
1313  * command upon completion. It is setup in the LPFC_MBOXQ
1314  * as the completion routine when the command is
1315  * handed off to the SLI layer.
1316  */
1317 void
1318 lpfc_mbx_cmpl_ns_reg_login(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
1319 {
1320         MAILBOX_t *mb = &pmb->mb;
1321         struct lpfc_dmabuf *mp = (struct lpfc_dmabuf *) (pmb->context1);
1322         struct lpfc_nodelist *ndlp = (struct lpfc_nodelist *) pmb->context2;
1323         struct lpfc_vport *vport = pmb->vport;
1324
1325         if (mb->mbxStatus) {
1326 out:
1327                 lpfc_nlp_put(ndlp);
1328                 lpfc_mbuf_free(phba, mp->virt, mp->phys);
1329                 kfree(mp);
1330                 mempool_free(pmb, phba->mbox_mem_pool);
1331
1332                 /* If no other thread is using the ndlp, free it */
1333                 lpfc_nlp_not_used(ndlp);
1334
1335                 if (phba->fc_topology == TOPOLOGY_LOOP) {
1336                         /*
1337                          * RegLogin failed, use loop map to make discovery
1338                          * list
1339                          */
1340                         lpfc_disc_list_loopmap(vport);
1341
1342                         /* Start discovery */
1343                         lpfc_disc_start(vport);
1344                         return;
1345                 }
1346                 lpfc_vport_set_state(vport, FC_VPORT_FAILED);
1347                 lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
1348                                  "0260 Register NameServer error: 0x%x\n",
1349                                  mb->mbxStatus);
1350                 return;
1351         }
1352
1353         pmb->context1 = NULL;
1354
1355         ndlp->nlp_rpi = mb->un.varWords[0];
1356         ndlp->nlp_type |= NLP_FABRIC;
1357         lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
1358
1359         if (vport->port_state < LPFC_VPORT_READY) {
1360                 /* Link up discovery requires Fabric registration. */
1361                 lpfc_ns_cmd(vport, SLI_CTNS_RFF_ID, 0, 0); /* Do this first! */
1362                 lpfc_ns_cmd(vport, SLI_CTNS_RNN_ID, 0, 0);
1363                 lpfc_ns_cmd(vport, SLI_CTNS_RSNN_NN, 0, 0);
1364                 lpfc_ns_cmd(vport, SLI_CTNS_RSPN_ID, 0, 0);
1365                 lpfc_ns_cmd(vport, SLI_CTNS_RFT_ID, 0, 0);
1366
1367                 /* Issue SCR just before NameServer GID_FT Query */
1368                 lpfc_issue_els_scr(vport, SCR_DID, 0);
1369         }
1370
1371         vport->fc_ns_retry = 0;
1372         /* Good status, issue CT Request to NameServer */
1373         if (lpfc_ns_cmd(vport, SLI_CTNS_GID_FT, 0, 0)) {
1374                 /* Cannot issue NameServer Query, so finish up discovery */
1375                 goto out;
1376         }
1377
1378         lpfc_nlp_put(ndlp);
1379         lpfc_mbuf_free(phba, mp->virt, mp->phys);
1380         kfree(mp);
1381         mempool_free(pmb, phba->mbox_mem_pool);
1382
1383         return;
1384 }
1385
1386 static void
1387 lpfc_register_remote_port(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
1388 {
1389         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1390         struct fc_rport  *rport;
1391         struct lpfc_rport_data *rdata;
1392         struct fc_rport_identifiers rport_ids;
1393         struct lpfc_hba  *phba = vport->phba;
1394
1395         /* Remote port has reappeared. Re-register w/ FC transport */
1396         rport_ids.node_name = wwn_to_u64(ndlp->nlp_nodename.u.wwn);
1397         rport_ids.port_name = wwn_to_u64(ndlp->nlp_portname.u.wwn);
1398         rport_ids.port_id = ndlp->nlp_DID;
1399         rport_ids.roles = FC_RPORT_ROLE_UNKNOWN;
1400
1401         /*
1402          * We leave our node pointer in rport->dd_data when we unregister a
1403          * FCP target port.  But fc_remote_port_add zeros the space to which
1404          * rport->dd_data points.  So, if we're reusing a previously
1405          * registered port, drop the reference that we took the last time we
1406          * registered the port.
1407          */
1408         if (ndlp->rport && ndlp->rport->dd_data &&
1409             ((struct lpfc_rport_data *) ndlp->rport->dd_data)->pnode == ndlp) {
1410                 lpfc_nlp_put(ndlp);
1411         }
1412
1413         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_RPORT,
1414                 "rport add:       did:x%x flg:x%x type x%x",
1415                 ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_type);
1416
1417         ndlp->rport = rport = fc_remote_port_add(shost, 0, &rport_ids);
1418         if (!rport || !get_device(&rport->dev)) {
1419                 dev_printk(KERN_WARNING, &phba->pcidev->dev,
1420                            "Warning: fc_remote_port_add failed\n");
1421                 return;
1422         }
1423
1424         /* initialize static port data */
1425         rport->maxframe_size = ndlp->nlp_maxframe;
1426         rport->supported_classes = ndlp->nlp_class_sup;
1427         rdata = rport->dd_data;
1428         rdata->pnode = lpfc_nlp_get(ndlp);
1429
1430         if (ndlp->nlp_type & NLP_FCP_TARGET)
1431                 rport_ids.roles |= FC_RPORT_ROLE_FCP_TARGET;
1432         if (ndlp->nlp_type & NLP_FCP_INITIATOR)
1433                 rport_ids.roles |= FC_RPORT_ROLE_FCP_INITIATOR;
1434
1435
1436         if (rport_ids.roles !=  FC_RPORT_ROLE_UNKNOWN)
1437                 fc_remote_port_rolechg(rport, rport_ids.roles);
1438
1439         if ((rport->scsi_target_id != -1) &&
1440             (rport->scsi_target_id < LPFC_MAX_TARGET)) {
1441                 ndlp->nlp_sid = rport->scsi_target_id;
1442         }
1443         return;
1444 }
1445
1446 static void
1447 lpfc_unregister_remote_port(struct lpfc_nodelist *ndlp)
1448 {
1449         struct fc_rport *rport = ndlp->rport;
1450
1451         lpfc_debugfs_disc_trc(ndlp->vport, LPFC_DISC_TRC_RPORT,
1452                 "rport delete:    did:x%x flg:x%x type x%x",
1453                 ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_type);
1454
1455         fc_remote_port_delete(rport);
1456
1457         return;
1458 }
1459
1460 static void
1461 lpfc_nlp_counters(struct lpfc_vport *vport, int state, int count)
1462 {
1463         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1464
1465         spin_lock_irq(shost->host_lock);
1466         switch (state) {
1467         case NLP_STE_UNUSED_NODE:
1468                 vport->fc_unused_cnt += count;
1469                 break;
1470         case NLP_STE_PLOGI_ISSUE:
1471                 vport->fc_plogi_cnt += count;
1472                 break;
1473         case NLP_STE_ADISC_ISSUE:
1474                 vport->fc_adisc_cnt += count;
1475                 break;
1476         case NLP_STE_REG_LOGIN_ISSUE:
1477                 vport->fc_reglogin_cnt += count;
1478                 break;
1479         case NLP_STE_PRLI_ISSUE:
1480                 vport->fc_prli_cnt += count;
1481                 break;
1482         case NLP_STE_UNMAPPED_NODE:
1483                 vport->fc_unmap_cnt += count;
1484                 break;
1485         case NLP_STE_MAPPED_NODE:
1486                 vport->fc_map_cnt += count;
1487                 break;
1488         case NLP_STE_NPR_NODE:
1489                 vport->fc_npr_cnt += count;
1490                 break;
1491         }
1492         spin_unlock_irq(shost->host_lock);
1493 }
1494
1495 static void
1496 lpfc_nlp_state_cleanup(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1497                        int old_state, int new_state)
1498 {
1499         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1500
1501         if (new_state == NLP_STE_UNMAPPED_NODE) {
1502                 ndlp->nlp_type &= ~(NLP_FCP_TARGET | NLP_FCP_INITIATOR);
1503                 ndlp->nlp_flag &= ~NLP_NODEV_REMOVE;
1504                 ndlp->nlp_type |= NLP_FC_NODE;
1505         }
1506         if (new_state == NLP_STE_MAPPED_NODE)
1507                 ndlp->nlp_flag &= ~NLP_NODEV_REMOVE;
1508         if (new_state == NLP_STE_NPR_NODE)
1509                 ndlp->nlp_flag &= ~NLP_RCV_PLOGI;
1510
1511         /* Transport interface */
1512         if (ndlp->rport && (old_state == NLP_STE_MAPPED_NODE ||
1513                             old_state == NLP_STE_UNMAPPED_NODE)) {
1514                 vport->phba->nport_event_cnt++;
1515                 lpfc_unregister_remote_port(ndlp);
1516         }
1517
1518         if (new_state ==  NLP_STE_MAPPED_NODE ||
1519             new_state == NLP_STE_UNMAPPED_NODE) {
1520                 vport->phba->nport_event_cnt++;
1521                 /*
1522                  * Tell the fc transport about the port, if we haven't
1523                  * already. If we have, and it's a scsi entity, be
1524                  * sure to unblock any attached scsi devices
1525                  */
1526                 lpfc_register_remote_port(vport, ndlp);
1527         }
1528         /*
1529          * if we added to Mapped list, but the remote port
1530          * registration failed or assigned a target id outside
1531          * our presentable range - move the node to the
1532          * Unmapped List
1533          */
1534         if (new_state == NLP_STE_MAPPED_NODE &&
1535             (!ndlp->rport ||
1536              ndlp->rport->scsi_target_id == -1 ||
1537              ndlp->rport->scsi_target_id >= LPFC_MAX_TARGET)) {
1538                 spin_lock_irq(shost->host_lock);
1539                 ndlp->nlp_flag |= NLP_TGT_NO_SCSIID;
1540                 spin_unlock_irq(shost->host_lock);
1541                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
1542         }
1543 }
1544
1545 static char *
1546 lpfc_nlp_state_name(char *buffer, size_t size, int state)
1547 {
1548         static char *states[] = {
1549                 [NLP_STE_UNUSED_NODE] = "UNUSED",
1550                 [NLP_STE_PLOGI_ISSUE] = "PLOGI",
1551                 [NLP_STE_ADISC_ISSUE] = "ADISC",
1552                 [NLP_STE_REG_LOGIN_ISSUE] = "REGLOGIN",
1553                 [NLP_STE_PRLI_ISSUE] = "PRLI",
1554                 [NLP_STE_UNMAPPED_NODE] = "UNMAPPED",
1555                 [NLP_STE_MAPPED_NODE] = "MAPPED",
1556                 [NLP_STE_NPR_NODE] = "NPR",
1557         };
1558
1559         if (state < NLP_STE_MAX_STATE && states[state])
1560                 strlcpy(buffer, states[state], size);
1561         else
1562                 snprintf(buffer, size, "unknown (%d)", state);
1563         return buffer;
1564 }
1565
1566 void
1567 lpfc_nlp_set_state(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1568                    int state)
1569 {
1570         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1571         int  old_state = ndlp->nlp_state;
1572         char name1[16], name2[16];
1573
1574         lpfc_printf_vlog(vport, KERN_INFO, LOG_NODE,
1575                          "0904 NPort state transition x%06x, %s -> %s\n",
1576                          ndlp->nlp_DID,
1577                          lpfc_nlp_state_name(name1, sizeof(name1), old_state),
1578                          lpfc_nlp_state_name(name2, sizeof(name2), state));
1579
1580         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_NODE,
1581                 "node statechg    did:x%x old:%d ste:%d",
1582                 ndlp->nlp_DID, old_state, state);
1583
1584         if (old_state == NLP_STE_NPR_NODE &&
1585             (ndlp->nlp_flag & NLP_DELAY_TMO) != 0 &&
1586             state != NLP_STE_NPR_NODE)
1587                 lpfc_cancel_retry_delay_tmo(vport, ndlp);
1588         if (old_state == NLP_STE_UNMAPPED_NODE) {
1589                 ndlp->nlp_flag &= ~NLP_TGT_NO_SCSIID;
1590                 ndlp->nlp_type &= ~NLP_FC_NODE;
1591         }
1592
1593         if (list_empty(&ndlp->nlp_listp)) {
1594                 spin_lock_irq(shost->host_lock);
1595                 list_add_tail(&ndlp->nlp_listp, &vport->fc_nodes);
1596                 spin_unlock_irq(shost->host_lock);
1597         } else if (old_state)
1598                 lpfc_nlp_counters(vport, old_state, -1);
1599
1600         ndlp->nlp_state = state;
1601         lpfc_nlp_counters(vport, state, 1);
1602         lpfc_nlp_state_cleanup(vport, ndlp, old_state, state);
1603 }
1604
1605 void
1606 lpfc_dequeue_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
1607 {
1608         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1609
1610         if ((ndlp->nlp_flag & NLP_DELAY_TMO) != 0)
1611                 lpfc_cancel_retry_delay_tmo(vport, ndlp);
1612         if (ndlp->nlp_state && !list_empty(&ndlp->nlp_listp))
1613                 lpfc_nlp_counters(vport, ndlp->nlp_state, -1);
1614         spin_lock_irq(shost->host_lock);
1615         list_del_init(&ndlp->nlp_listp);
1616         spin_unlock_irq(shost->host_lock);
1617         lpfc_nlp_state_cleanup(vport, ndlp, ndlp->nlp_state,
1618                                NLP_STE_UNUSED_NODE);
1619 }
1620
1621 void
1622 lpfc_drop_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
1623 {
1624         /*
1625          * Use of lpfc_drop_node and UNUSED list. lpfc_drop_node should
1626          * be used if we wish to issue the "last" lpfc_nlp_put() to remove
1627          * the ndlp from the vport.  The ndlp resides on the UNUSED list
1628          * until ALL other outstanding threads have completed. Thus, if a
1629          * ndlp is on the UNUSED list already, we should never do another
1630          * lpfc_drop_node() on it.
1631          */
1632         lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNUSED_NODE);
1633         lpfc_nlp_put(ndlp);
1634         return;
1635 }
1636
1637 /*
1638  * Start / ReStart rescue timer for Discovery / RSCN handling
1639  */
1640 void
1641 lpfc_set_disctmo(struct lpfc_vport *vport)
1642 {
1643         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1644         struct lpfc_hba  *phba = vport->phba;
1645         uint32_t tmo;
1646
1647         if (vport->port_state == LPFC_LOCAL_CFG_LINK) {
1648                 /* For FAN, timeout should be greater then edtov */
1649                 tmo = (((phba->fc_edtov + 999) / 1000) + 1);
1650         } else {
1651                 /* Normal discovery timeout should be > then ELS/CT timeout
1652                  * FC spec states we need 3 * ratov for CT requests
1653                  */
1654                 tmo = ((phba->fc_ratov * 3) + 3);
1655         }
1656
1657
1658         if (!timer_pending(&vport->fc_disctmo)) {
1659                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
1660                         "set disc timer:  tmo:x%x state:x%x flg:x%x",
1661                         tmo, vport->port_state, vport->fc_flag);
1662         }
1663
1664         mod_timer(&vport->fc_disctmo, jiffies + HZ * tmo);
1665         spin_lock_irq(shost->host_lock);
1666         vport->fc_flag |= FC_DISC_TMO;
1667         spin_unlock_irq(shost->host_lock);
1668
1669         /* Start Discovery Timer state <hba_state> */
1670         lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
1671                          "0247 Start Discovery Timer state x%x "
1672                          "Data: x%x x%lx x%x x%x\n",
1673                          vport->port_state, tmo,
1674                          (unsigned long)&vport->fc_disctmo, vport->fc_plogi_cnt,
1675                          vport->fc_adisc_cnt);
1676
1677         return;
1678 }
1679
1680 /*
1681  * Cancel rescue timer for Discovery / RSCN handling
1682  */
1683 int
1684 lpfc_can_disctmo(struct lpfc_vport *vport)
1685 {
1686         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1687         unsigned long iflags;
1688
1689         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
1690                 "can disc timer:  state:x%x rtry:x%x flg:x%x",
1691                 vport->port_state, vport->fc_ns_retry, vport->fc_flag);
1692
1693         /* Turn off discovery timer if its running */
1694         if (vport->fc_flag & FC_DISC_TMO) {
1695                 spin_lock_irqsave(shost->host_lock, iflags);
1696                 vport->fc_flag &= ~FC_DISC_TMO;
1697                 spin_unlock_irqrestore(shost->host_lock, iflags);
1698                 del_timer_sync(&vport->fc_disctmo);
1699                 spin_lock_irqsave(&vport->work_port_lock, iflags);
1700                 vport->work_port_events &= ~WORKER_DISC_TMO;
1701                 spin_unlock_irqrestore(&vport->work_port_lock, iflags);
1702         }
1703
1704         /* Cancel Discovery Timer state <hba_state> */
1705         lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
1706                          "0248 Cancel Discovery Timer state x%x "
1707                          "Data: x%x x%x x%x\n",
1708                          vport->port_state, vport->fc_flag,
1709                          vport->fc_plogi_cnt, vport->fc_adisc_cnt);
1710         return 0;
1711 }
1712
1713 /*
1714  * Check specified ring for outstanding IOCB on the SLI queue
1715  * Return true if iocb matches the specified nport
1716  */
1717 int
1718 lpfc_check_sli_ndlp(struct lpfc_hba *phba,
1719                     struct lpfc_sli_ring *pring,
1720                     struct lpfc_iocbq *iocb,
1721                     struct lpfc_nodelist *ndlp)
1722 {
1723         struct lpfc_sli *psli = &phba->sli;
1724         IOCB_t *icmd = &iocb->iocb;
1725         struct lpfc_vport    *vport = ndlp->vport;
1726
1727         if (iocb->vport != vport)
1728                 return 0;
1729
1730         if (pring->ringno == LPFC_ELS_RING) {
1731                 switch (icmd->ulpCommand) {
1732                 case CMD_GEN_REQUEST64_CR:
1733                         if (icmd->ulpContext == (volatile ushort)ndlp->nlp_rpi)
1734                                 return 1;
1735                 case CMD_ELS_REQUEST64_CR:
1736                         if (icmd->un.elsreq64.remoteID == ndlp->nlp_DID)
1737                                 return 1;
1738                 case CMD_XMIT_ELS_RSP64_CX:
1739                         if (iocb->context1 == (uint8_t *) ndlp)
1740                                 return 1;
1741                 }
1742         } else if (pring->ringno == psli->extra_ring) {
1743
1744         } else if (pring->ringno == psli->fcp_ring) {
1745                 /* Skip match check if waiting to relogin to FCP target */
1746                 if ((ndlp->nlp_type & NLP_FCP_TARGET) &&
1747                     (ndlp->nlp_flag & NLP_DELAY_TMO)) {
1748                         return 0;
1749                 }
1750                 if (icmd->ulpContext == (volatile ushort)ndlp->nlp_rpi) {
1751                         return 1;
1752                 }
1753         } else if (pring->ringno == psli->next_ring) {
1754
1755         }
1756         return 0;
1757 }
1758
1759 /*
1760  * Free resources / clean up outstanding I/Os
1761  * associated with nlp_rpi in the LPFC_NODELIST entry.
1762  */
1763 static int
1764 lpfc_no_rpi(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
1765 {
1766         LIST_HEAD(completions);
1767         struct lpfc_sli *psli;
1768         struct lpfc_sli_ring *pring;
1769         struct lpfc_iocbq *iocb, *next_iocb;
1770         IOCB_t *icmd;
1771         uint32_t rpi, i;
1772
1773         lpfc_fabric_abort_nport(ndlp);
1774
1775         /*
1776          * Everything that matches on txcmplq will be returned
1777          * by firmware with a no rpi error.
1778          */
1779         psli = &phba->sli;
1780         rpi = ndlp->nlp_rpi;
1781         if (rpi) {
1782                 /* Now process each ring */
1783                 for (i = 0; i < psli->num_rings; i++) {
1784                         pring = &psli->ring[i];
1785
1786                         spin_lock_irq(&phba->hbalock);
1787                         list_for_each_entry_safe(iocb, next_iocb, &pring->txq,
1788                                                  list) {
1789                                 /*
1790                                  * Check to see if iocb matches the nport we are
1791                                  * looking for
1792                                  */
1793                                 if ((lpfc_check_sli_ndlp(phba, pring, iocb,
1794                                                          ndlp))) {
1795                                         /* It matches, so deque and call compl
1796                                            with an error */
1797                                         list_move_tail(&iocb->list,
1798                                                        &completions);
1799                                         pring->txq_cnt--;
1800                                 }
1801                         }
1802                         spin_unlock_irq(&phba->hbalock);
1803                 }
1804         }
1805
1806         while (!list_empty(&completions)) {
1807                 iocb = list_get_first(&completions, struct lpfc_iocbq, list);
1808                 list_del_init(&iocb->list);
1809
1810                 if (!iocb->iocb_cmpl)
1811                         lpfc_sli_release_iocbq(phba, iocb);
1812                 else {
1813                         icmd = &iocb->iocb;
1814                         icmd->ulpStatus = IOSTAT_LOCAL_REJECT;
1815                         icmd->un.ulpWord[4] = IOERR_SLI_ABORTED;
1816                         (iocb->iocb_cmpl)(phba, iocb, iocb);
1817                 }
1818         }
1819
1820         return 0;
1821 }
1822
1823 /*
1824  * Free rpi associated with LPFC_NODELIST entry.
1825  * This routine is called from lpfc_freenode(), when we are removing
1826  * a LPFC_NODELIST entry. It is also called if the driver initiates a
1827  * LOGO that completes successfully, and we are waiting to PLOGI back
1828  * to the remote NPort. In addition, it is called after we receive
1829  * and unsolicated ELS cmd, send back a rsp, the rsp completes and
1830  * we are waiting to PLOGI back to the remote NPort.
1831  */
1832 int
1833 lpfc_unreg_rpi(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
1834 {
1835         struct lpfc_hba *phba = vport->phba;
1836         LPFC_MBOXQ_t    *mbox;
1837         int rc;
1838
1839         if (ndlp->nlp_rpi) {
1840                 mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
1841                 if (mbox) {
1842                         lpfc_unreg_login(phba, vport->vpi, ndlp->nlp_rpi, mbox);
1843                         mbox->vport = vport;
1844                         mbox->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
1845                         rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
1846                         if (rc == MBX_NOT_FINISHED)
1847                                 mempool_free(mbox, phba->mbox_mem_pool);
1848                 }
1849                 lpfc_no_rpi(phba, ndlp);
1850                 ndlp->nlp_rpi = 0;
1851                 return 1;
1852         }
1853         return 0;
1854 }
1855
1856 void
1857 lpfc_unreg_all_rpis(struct lpfc_vport *vport)
1858 {
1859         struct lpfc_hba  *phba  = vport->phba;
1860         LPFC_MBOXQ_t     *mbox;
1861         int rc;
1862
1863         mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
1864         if (mbox) {
1865                 lpfc_unreg_login(phba, vport->vpi, 0xffff, mbox);
1866                 mbox->vport = vport;
1867                 mbox->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
1868                 rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
1869                 if (rc == MBX_NOT_FINISHED) {
1870                         mempool_free(mbox, phba->mbox_mem_pool);
1871                 }
1872         }
1873 }
1874
1875 void
1876 lpfc_unreg_default_rpis(struct lpfc_vport *vport)
1877 {
1878         struct lpfc_hba  *phba  = vport->phba;
1879         LPFC_MBOXQ_t     *mbox;
1880         int rc;
1881
1882         mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
1883         if (mbox) {
1884                 lpfc_unreg_did(phba, vport->vpi, 0xffffffff, mbox);
1885                 mbox->vport = vport;
1886                 mbox->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
1887                 rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
1888                 if (rc == MBX_NOT_FINISHED) {
1889                         lpfc_printf_vlog(vport, KERN_ERR, LOG_MBOX | LOG_VPORT,
1890                                          "1815 Could not issue "
1891                                          "unreg_did (default rpis)\n");
1892                         mempool_free(mbox, phba->mbox_mem_pool);
1893                 }
1894         }
1895 }
1896
1897 /*
1898  * Free resources associated with LPFC_NODELIST entry
1899  * so it can be freed.
1900  */
1901 static int
1902 lpfc_cleanup_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
1903 {
1904         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1905         struct lpfc_hba  *phba = vport->phba;
1906         LPFC_MBOXQ_t *mb, *nextmb;
1907         struct lpfc_dmabuf *mp;
1908
1909         /* Cleanup node for NPort <nlp_DID> */
1910         lpfc_printf_vlog(vport, KERN_INFO, LOG_NODE,
1911                          "0900 Cleanup node for NPort x%x "
1912                          "Data: x%x x%x x%x\n",
1913                          ndlp->nlp_DID, ndlp->nlp_flag,
1914                          ndlp->nlp_state, ndlp->nlp_rpi);
1915         lpfc_dequeue_node(vport, ndlp);
1916
1917         /* cleanup any ndlp on mbox q waiting for reglogin cmpl */
1918         if ((mb = phba->sli.mbox_active)) {
1919                 if ((mb->mb.mbxCommand == MBX_REG_LOGIN64) &&
1920                    (ndlp == (struct lpfc_nodelist *) mb->context2)) {
1921                         mb->context2 = NULL;
1922                         mb->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
1923                 }
1924         }
1925
1926         spin_lock_irq(&phba->hbalock);
1927         list_for_each_entry_safe(mb, nextmb, &phba->sli.mboxq, list) {
1928                 if ((mb->mb.mbxCommand == MBX_REG_LOGIN64) &&
1929                     (ndlp == (struct lpfc_nodelist *) mb->context2)) {
1930                         mp = (struct lpfc_dmabuf *) (mb->context1);
1931                         if (mp) {
1932                                 __lpfc_mbuf_free(phba, mp->virt, mp->phys);
1933                                 kfree(mp);
1934                         }
1935                         list_del(&mb->list);
1936                         mempool_free(mb, phba->mbox_mem_pool);
1937                         lpfc_nlp_put(ndlp);
1938                 }
1939         }
1940         spin_unlock_irq(&phba->hbalock);
1941
1942         lpfc_els_abort(phba,ndlp);
1943         spin_lock_irq(shost->host_lock);
1944         ndlp->nlp_flag &= ~NLP_DELAY_TMO;
1945         spin_unlock_irq(shost->host_lock);
1946
1947         ndlp->nlp_last_elscmd = 0;
1948         del_timer_sync(&ndlp->nlp_delayfunc);
1949
1950         if (!list_empty(&ndlp->els_retry_evt.evt_listp))
1951                 list_del_init(&ndlp->els_retry_evt.evt_listp);
1952         if (!list_empty(&ndlp->dev_loss_evt.evt_listp))
1953                 list_del_init(&ndlp->dev_loss_evt.evt_listp);
1954
1955         lpfc_unreg_rpi(vport, ndlp);
1956
1957         return 0;
1958 }
1959
1960 /*
1961  * Check to see if we can free the nlp back to the freelist.
1962  * If we are in the middle of using the nlp in the discovery state
1963  * machine, defer the free till we reach the end of the state machine.
1964  */
1965 static void
1966 lpfc_nlp_remove(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
1967 {
1968         struct lpfc_rport_data *rdata;
1969
1970         if (ndlp->nlp_flag & NLP_DELAY_TMO) {
1971                 lpfc_cancel_retry_delay_tmo(vport, ndlp);
1972         }
1973
1974         lpfc_cleanup_node(vport, ndlp);
1975
1976         /*
1977          * We can get here with a non-NULL ndlp->rport because when we
1978          * unregister a rport we don't break the rport/node linkage.  So if we
1979          * do, make sure we don't leaving any dangling pointers behind.
1980          */
1981         if (ndlp->rport) {
1982                 rdata = ndlp->rport->dd_data;
1983                 rdata->pnode = NULL;
1984                 ndlp->rport = NULL;
1985         }
1986 }
1987
1988 static int
1989 lpfc_matchdid(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1990               uint32_t did)
1991 {
1992         D_ID mydid, ndlpdid, matchdid;
1993
1994         if (did == Bcast_DID)
1995                 return 0;
1996
1997         if (ndlp->nlp_DID == 0) {
1998                 return 0;
1999         }
2000
2001         /* First check for Direct match */
2002         if (ndlp->nlp_DID == did)
2003                 return 1;
2004
2005         /* Next check for area/domain identically equals 0 match */
2006         mydid.un.word = vport->fc_myDID;
2007         if ((mydid.un.b.domain == 0) && (mydid.un.b.area == 0)) {
2008                 return 0;
2009         }
2010
2011         matchdid.un.word = did;
2012         ndlpdid.un.word = ndlp->nlp_DID;
2013         if (matchdid.un.b.id == ndlpdid.un.b.id) {
2014                 if ((mydid.un.b.domain == matchdid.un.b.domain) &&
2015                     (mydid.un.b.area == matchdid.un.b.area)) {
2016                         if ((ndlpdid.un.b.domain == 0) &&
2017                             (ndlpdid.un.b.area == 0)) {
2018                                 if (ndlpdid.un.b.id)
2019                                         return 1;
2020                         }
2021                         return 0;
2022                 }
2023
2024                 matchdid.un.word = ndlp->nlp_DID;
2025                 if ((mydid.un.b.domain == ndlpdid.un.b.domain) &&
2026                     (mydid.un.b.area == ndlpdid.un.b.area)) {
2027                         if ((matchdid.un.b.domain == 0) &&
2028                             (matchdid.un.b.area == 0)) {
2029                                 if (matchdid.un.b.id)
2030                                         return 1;
2031                         }
2032                 }
2033         }
2034         return 0;
2035 }
2036
2037 /* Search for a nodelist entry */
2038 static struct lpfc_nodelist *
2039 __lpfc_findnode_did(struct lpfc_vport *vport, uint32_t did)
2040 {
2041         struct lpfc_nodelist *ndlp;
2042         uint32_t data1;
2043
2044         list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
2045                 if (lpfc_matchdid(vport, ndlp, did)) {
2046                         data1 = (((uint32_t) ndlp->nlp_state << 24) |
2047                                  ((uint32_t) ndlp->nlp_xri << 16) |
2048                                  ((uint32_t) ndlp->nlp_type << 8) |
2049                                  ((uint32_t) ndlp->nlp_rpi & 0xff));
2050                         lpfc_printf_vlog(vport, KERN_INFO, LOG_NODE,
2051                                          "0929 FIND node DID "
2052                                          "Data: x%p x%x x%x x%x\n",
2053                                          ndlp, ndlp->nlp_DID,
2054                                          ndlp->nlp_flag, data1);
2055                         return ndlp;
2056                 }
2057         }
2058
2059         /* FIND node did <did> NOT FOUND */
2060         lpfc_printf_vlog(vport, KERN_INFO, LOG_NODE,
2061                          "0932 FIND node did x%x NOT FOUND.\n", did);
2062         return NULL;
2063 }
2064
2065 struct lpfc_nodelist *
2066 lpfc_findnode_did(struct lpfc_vport *vport, uint32_t did)
2067 {
2068         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
2069         struct lpfc_nodelist *ndlp;
2070
2071         spin_lock_irq(shost->host_lock);
2072         ndlp = __lpfc_findnode_did(vport, did);
2073         spin_unlock_irq(shost->host_lock);
2074         return ndlp;
2075 }
2076
2077 struct lpfc_nodelist *
2078 lpfc_setup_disc_node(struct lpfc_vport *vport, uint32_t did)
2079 {
2080         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
2081         struct lpfc_nodelist *ndlp;
2082
2083         ndlp = lpfc_findnode_did(vport, did);
2084         if (!ndlp) {
2085                 if ((vport->fc_flag & FC_RSCN_MODE) != 0 &&
2086                     lpfc_rscn_payload_check(vport, did) == 0)
2087                         return NULL;
2088                 ndlp = (struct lpfc_nodelist *)
2089                      mempool_alloc(vport->phba->nlp_mem_pool, GFP_KERNEL);
2090                 if (!ndlp)
2091                         return NULL;
2092                 lpfc_nlp_init(vport, ndlp, did);
2093                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
2094                 spin_lock_irq(shost->host_lock);
2095                 ndlp->nlp_flag |= NLP_NPR_2B_DISC;
2096                 spin_unlock_irq(shost->host_lock);
2097                 return ndlp;
2098         }
2099         if (vport->fc_flag & FC_RSCN_MODE) {
2100                 if (lpfc_rscn_payload_check(vport, did)) {
2101                         /* If we've already recieved a PLOGI from this NPort
2102                          * we don't need to try to discover it again.
2103                          */
2104                         if (ndlp->nlp_flag & NLP_RCV_PLOGI)
2105                                 return NULL;
2106
2107                         spin_lock_irq(shost->host_lock);
2108                         ndlp->nlp_flag |= NLP_NPR_2B_DISC;
2109                         spin_unlock_irq(shost->host_lock);
2110
2111                         /* Since this node is marked for discovery,
2112                          * delay timeout is not needed.
2113                          */
2114                         if (ndlp->nlp_flag & NLP_DELAY_TMO)
2115                                 lpfc_cancel_retry_delay_tmo(vport, ndlp);
2116                 } else
2117                         ndlp = NULL;
2118         } else {
2119                 /* If we've already recieved a PLOGI from this NPort,
2120                  * or we are already in the process of discovery on it,
2121                  * we don't need to try to discover it again.
2122                  */
2123                 if (ndlp->nlp_state == NLP_STE_ADISC_ISSUE ||
2124                     ndlp->nlp_state == NLP_STE_PLOGI_ISSUE ||
2125                     ndlp->nlp_flag & NLP_RCV_PLOGI)
2126                         return NULL;
2127                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
2128                 spin_lock_irq(shost->host_lock);
2129                 ndlp->nlp_flag |= NLP_NPR_2B_DISC;
2130                 spin_unlock_irq(shost->host_lock);
2131         }
2132         return ndlp;
2133 }
2134
2135 /* Build a list of nodes to discover based on the loopmap */
2136 void
2137 lpfc_disc_list_loopmap(struct lpfc_vport *vport)
2138 {
2139         struct lpfc_hba  *phba = vport->phba;
2140         int j;
2141         uint32_t alpa, index;
2142
2143         if (!lpfc_is_link_up(phba))
2144                 return;
2145
2146         if (phba->fc_topology != TOPOLOGY_LOOP)
2147                 return;
2148
2149         /* Check for loop map present or not */
2150         if (phba->alpa_map[0]) {
2151                 for (j = 1; j <= phba->alpa_map[0]; j++) {
2152                         alpa = phba->alpa_map[j];
2153                         if (((vport->fc_myDID & 0xff) == alpa) || (alpa == 0))
2154                                 continue;
2155                         lpfc_setup_disc_node(vport, alpa);
2156                 }
2157         } else {
2158                 /* No alpamap, so try all alpa's */
2159                 for (j = 0; j < FC_MAXLOOP; j++) {
2160                         /* If cfg_scan_down is set, start from highest
2161                          * ALPA (0xef) to lowest (0x1).
2162                          */
2163                         if (vport->cfg_scan_down)
2164                                 index = j;
2165                         else
2166                                 index = FC_MAXLOOP - j - 1;
2167                         alpa = lpfcAlpaArray[index];
2168                         if ((vport->fc_myDID & 0xff) == alpa)
2169                                 continue;
2170                         lpfc_setup_disc_node(vport, alpa);
2171                 }
2172         }
2173         return;
2174 }
2175
2176 void
2177 lpfc_issue_clear_la(struct lpfc_hba *phba, struct lpfc_vport *vport)
2178 {
2179         LPFC_MBOXQ_t *mbox;
2180         struct lpfc_sli *psli = &phba->sli;
2181         struct lpfc_sli_ring *extra_ring = &psli->ring[psli->extra_ring];
2182         struct lpfc_sli_ring *fcp_ring   = &psli->ring[psli->fcp_ring];
2183         struct lpfc_sli_ring *next_ring  = &psli->ring[psli->next_ring];
2184         int  rc;
2185
2186         /*
2187          * if it's not a physical port or if we already send
2188          * clear_la then don't send it.
2189          */
2190         if ((phba->link_state >= LPFC_CLEAR_LA) ||
2191             (vport->port_type != LPFC_PHYSICAL_PORT))
2192                 return;
2193
2194                         /* Link up discovery */
2195         if ((mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL)) != NULL) {
2196                 phba->link_state = LPFC_CLEAR_LA;
2197                 lpfc_clear_la(phba, mbox);
2198                 mbox->mbox_cmpl = lpfc_mbx_cmpl_clear_la;
2199                 mbox->vport = vport;
2200                 rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
2201                 if (rc == MBX_NOT_FINISHED) {
2202                         mempool_free(mbox, phba->mbox_mem_pool);
2203                         lpfc_disc_flush_list(vport);
2204                         extra_ring->flag &= ~LPFC_STOP_IOCB_EVENT;
2205                         fcp_ring->flag &= ~LPFC_STOP_IOCB_EVENT;
2206                         next_ring->flag &= ~LPFC_STOP_IOCB_EVENT;
2207                         phba->link_state = LPFC_HBA_ERROR;
2208                 }
2209         }
2210 }
2211
2212 /* Reg_vpi to tell firmware to resume normal operations */
2213 void
2214 lpfc_issue_reg_vpi(struct lpfc_hba *phba, struct lpfc_vport *vport)
2215 {
2216         LPFC_MBOXQ_t *regvpimbox;
2217
2218         regvpimbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
2219         if (regvpimbox) {
2220                 lpfc_reg_vpi(phba, vport->vpi, vport->fc_myDID, regvpimbox);
2221                 regvpimbox->mbox_cmpl = lpfc_mbx_cmpl_reg_vpi;
2222                 regvpimbox->vport = vport;
2223                 if (lpfc_sli_issue_mbox(phba, regvpimbox, MBX_NOWAIT)
2224                                         == MBX_NOT_FINISHED) {
2225                         mempool_free(regvpimbox, phba->mbox_mem_pool);
2226                 }
2227         }
2228 }
2229
2230 /* Start Link up / RSCN discovery on NPR nodes */
2231 void
2232 lpfc_disc_start(struct lpfc_vport *vport)
2233 {
2234         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
2235         struct lpfc_hba  *phba = vport->phba;
2236         uint32_t num_sent;
2237         uint32_t clear_la_pending;
2238         int did_changed;
2239
2240         if (!lpfc_is_link_up(phba))
2241                 return;
2242
2243         if (phba->link_state == LPFC_CLEAR_LA)
2244                 clear_la_pending = 1;
2245         else
2246                 clear_la_pending = 0;
2247
2248         if (vport->port_state < LPFC_VPORT_READY)
2249                 vport->port_state = LPFC_DISC_AUTH;
2250
2251         lpfc_set_disctmo(vport);
2252
2253         if (vport->fc_prevDID == vport->fc_myDID)
2254                 did_changed = 0;
2255         else
2256                 did_changed = 1;
2257
2258         vport->fc_prevDID = vport->fc_myDID;
2259         vport->num_disc_nodes = 0;
2260
2261         /* Start Discovery state <hba_state> */
2262         lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
2263                          "0202 Start Discovery hba state x%x "
2264                          "Data: x%x x%x x%x\n",
2265                          vport->port_state, vport->fc_flag, vport->fc_plogi_cnt,
2266                          vport->fc_adisc_cnt);
2267
2268         /* First do ADISCs - if any */
2269         num_sent = lpfc_els_disc_adisc(vport);
2270
2271         if (num_sent)
2272                 return;
2273
2274         /*
2275          * For SLI3, cmpl_reg_vpi will set port_state to READY, and
2276          * continue discovery.
2277          */
2278         if ((phba->sli3_options & LPFC_SLI3_NPIV_ENABLED) &&
2279             !(vport->fc_flag & FC_RSCN_MODE)) {
2280                 lpfc_issue_reg_vpi(phba, vport);
2281                 return;
2282         }
2283
2284         /*
2285          * For SLI2, we need to set port_state to READY and continue
2286          * discovery.
2287          */
2288         if (vport->port_state < LPFC_VPORT_READY && !clear_la_pending) {
2289                 /* If we get here, there is nothing to ADISC */
2290                 if (vport->port_type == LPFC_PHYSICAL_PORT)
2291                         lpfc_issue_clear_la(phba, vport);
2292
2293                 if (!(vport->fc_flag & FC_ABORT_DISCOVERY)) {
2294                         vport->num_disc_nodes = 0;
2295                         /* go thru NPR nodes and issue ELS PLOGIs */
2296                         if (vport->fc_npr_cnt)
2297                                 lpfc_els_disc_plogi(vport);
2298
2299                         if (!vport->num_disc_nodes) {
2300                                 spin_lock_irq(shost->host_lock);
2301                                 vport->fc_flag &= ~FC_NDISC_ACTIVE;
2302                                 spin_unlock_irq(shost->host_lock);
2303                                 lpfc_can_disctmo(vport);
2304                         }
2305                 }
2306                 vport->port_state = LPFC_VPORT_READY;
2307         } else {
2308                 /* Next do PLOGIs - if any */
2309                 num_sent = lpfc_els_disc_plogi(vport);
2310
2311                 if (num_sent)
2312                         return;
2313
2314                 if (vport->fc_flag & FC_RSCN_MODE) {
2315                         /* Check to see if more RSCNs came in while we
2316                          * were processing this one.
2317                          */
2318                         if ((vport->fc_rscn_id_cnt == 0) &&
2319                             (!(vport->fc_flag & FC_RSCN_DISCOVERY))) {
2320                                 spin_lock_irq(shost->host_lock);
2321                                 vport->fc_flag &= ~FC_RSCN_MODE;
2322                                 spin_unlock_irq(shost->host_lock);
2323                                 lpfc_can_disctmo(vport);
2324                         } else
2325                                 lpfc_els_handle_rscn(vport);
2326                 }
2327         }
2328         return;
2329 }
2330
2331 /*
2332  *  Ignore completion for all IOCBs on tx and txcmpl queue for ELS
2333  *  ring the match the sppecified nodelist.
2334  */
2335 static void
2336 lpfc_free_tx(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
2337 {
2338         LIST_HEAD(completions);
2339         struct lpfc_sli *psli;
2340         IOCB_t     *icmd;
2341         struct lpfc_iocbq    *iocb, *next_iocb;
2342         struct lpfc_sli_ring *pring;
2343
2344         psli = &phba->sli;
2345         pring = &psli->ring[LPFC_ELS_RING];
2346
2347         /* Error matching iocb on txq or txcmplq
2348          * First check the txq.
2349          */
2350         spin_lock_irq(&phba->hbalock);
2351         list_for_each_entry_safe(iocb, next_iocb, &pring->txq, list) {
2352                 if (iocb->context1 != ndlp) {
2353                         continue;
2354                 }
2355                 icmd = &iocb->iocb;
2356                 if ((icmd->ulpCommand == CMD_ELS_REQUEST64_CR) ||
2357                     (icmd->ulpCommand == CMD_XMIT_ELS_RSP64_CX)) {
2358
2359                         list_move_tail(&iocb->list, &completions);
2360                         pring->txq_cnt--;
2361                 }
2362         }
2363
2364         /* Next check the txcmplq */
2365         list_for_each_entry_safe(iocb, next_iocb, &pring->txcmplq, list) {
2366                 if (iocb->context1 != ndlp) {
2367                         continue;
2368                 }
2369                 icmd = &iocb->iocb;
2370                 if (icmd->ulpCommand == CMD_ELS_REQUEST64_CR ||
2371                     icmd->ulpCommand == CMD_XMIT_ELS_RSP64_CX) {
2372                         lpfc_sli_issue_abort_iotag(phba, pring, iocb);
2373                 }
2374         }
2375         spin_unlock_irq(&phba->hbalock);
2376
2377         while (!list_empty(&completions)) {
2378                 iocb = list_get_first(&completions, struct lpfc_iocbq, list);
2379                 list_del_init(&iocb->list);
2380
2381                 if (!iocb->iocb_cmpl)
2382                         lpfc_sli_release_iocbq(phba, iocb);
2383                 else {
2384                         icmd = &iocb->iocb;
2385                         icmd->ulpStatus = IOSTAT_LOCAL_REJECT;
2386                         icmd->un.ulpWord[4] = IOERR_SLI_ABORTED;
2387                         (iocb->iocb_cmpl) (phba, iocb, iocb);
2388                 }
2389         }
2390 }
2391
2392 void
2393 lpfc_disc_flush_list(struct lpfc_vport *vport)
2394 {
2395         struct lpfc_nodelist *ndlp, *next_ndlp;
2396         struct lpfc_hba *phba = vport->phba;
2397
2398         if (vport->fc_plogi_cnt || vport->fc_adisc_cnt) {
2399                 list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes,
2400                                          nlp_listp) {
2401                         if (ndlp->nlp_state == NLP_STE_PLOGI_ISSUE ||
2402                             ndlp->nlp_state == NLP_STE_ADISC_ISSUE) {
2403                                 lpfc_free_tx(phba, ndlp);
2404                         }
2405                 }
2406         }
2407 }
2408
2409 void
2410 lpfc_cleanup_discovery_resources(struct lpfc_vport *vport)
2411 {
2412         lpfc_els_flush_rscn(vport);
2413         lpfc_els_flush_cmd(vport);
2414         lpfc_disc_flush_list(vport);
2415 }
2416
2417 /*****************************************************************************/
2418 /*
2419  * NAME:     lpfc_disc_timeout
2420  *
2421  * FUNCTION: Fibre Channel driver discovery timeout routine.
2422  *
2423  * EXECUTION ENVIRONMENT: interrupt only
2424  *
2425  * CALLED FROM:
2426  *      Timer function
2427  *
2428  * RETURNS:
2429  *      none
2430  */
2431 /*****************************************************************************/
2432 void
2433 lpfc_disc_timeout(unsigned long ptr)
2434 {
2435         struct lpfc_vport *vport = (struct lpfc_vport *) ptr;
2436         struct lpfc_hba   *phba = vport->phba;
2437         unsigned long flags = 0;
2438
2439         if (unlikely(!phba))
2440                 return;
2441
2442         if ((vport->work_port_events & WORKER_DISC_TMO) == 0) {
2443                 spin_lock_irqsave(&vport->work_port_lock, flags);
2444                 vport->work_port_events |= WORKER_DISC_TMO;
2445                 spin_unlock_irqrestore(&vport->work_port_lock, flags);
2446
2447                 spin_lock_irqsave(&phba->hbalock, flags);
2448                 if (phba->work_wait)
2449                         lpfc_worker_wake_up(phba);
2450                 spin_unlock_irqrestore(&phba->hbalock, flags);
2451         }
2452         return;
2453 }
2454
2455 static void
2456 lpfc_disc_timeout_handler(struct lpfc_vport *vport)
2457 {
2458         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
2459         struct lpfc_hba  *phba = vport->phba;
2460         struct lpfc_sli  *psli = &phba->sli;
2461         struct lpfc_nodelist *ndlp, *next_ndlp;
2462         LPFC_MBOXQ_t *initlinkmbox;
2463         int rc, clrlaerr = 0;
2464
2465         if (!(vport->fc_flag & FC_DISC_TMO))
2466                 return;
2467
2468         spin_lock_irq(shost->host_lock);
2469         vport->fc_flag &= ~FC_DISC_TMO;
2470         spin_unlock_irq(shost->host_lock);
2471
2472         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
2473                 "disc timeout:    state:x%x rtry:x%x flg:x%x",
2474                 vport->port_state, vport->fc_ns_retry, vport->fc_flag);
2475
2476         switch (vport->port_state) {
2477
2478         case LPFC_LOCAL_CFG_LINK:
2479         /* port_state is identically  LPFC_LOCAL_CFG_LINK while waiting for
2480          * FAN
2481          */
2482                                 /* FAN timeout */
2483                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_DISCOVERY,
2484                                  "0221 FAN timeout\n");
2485                 /* Start discovery by sending FLOGI, clean up old rpis */
2486                 list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes,
2487                                          nlp_listp) {
2488                         if (ndlp->nlp_state != NLP_STE_NPR_NODE)
2489                                 continue;
2490                         if (ndlp->nlp_type & NLP_FABRIC) {
2491                                 /* Clean up the ndlp on Fabric connections */
2492                                 lpfc_drop_node(vport, ndlp);
2493
2494                         } else if (!(ndlp->nlp_flag & NLP_NPR_ADISC)) {
2495                                 /* Fail outstanding IO now since device
2496                                  * is marked for PLOGI.
2497                                  */
2498                                 lpfc_unreg_rpi(vport, ndlp);
2499                         }
2500                 }
2501                 if (vport->port_state != LPFC_FLOGI) {
2502                         lpfc_initial_flogi(vport);
2503                 }
2504                 break;
2505
2506         case LPFC_FDISC:
2507         case LPFC_FLOGI:
2508         /* port_state is identically LPFC_FLOGI while waiting for FLOGI cmpl */
2509                 /* Initial FLOGI timeout */
2510                 lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
2511                                  "0222 Initial %s timeout\n",
2512                                  vport->vpi ? "FDISC" : "FLOGI");
2513
2514                 /* Assume no Fabric and go on with discovery.
2515                  * Check for outstanding ELS FLOGI to abort.
2516                  */
2517
2518                 /* FLOGI failed, so just use loop map to make discovery list */
2519                 lpfc_disc_list_loopmap(vport);
2520
2521                 /* Start discovery */
2522                 lpfc_disc_start(vport);
2523                 break;
2524
2525         case LPFC_FABRIC_CFG_LINK:
2526         /* hba_state is identically LPFC_FABRIC_CFG_LINK while waiting for
2527            NameServer login */
2528                 lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
2529                                  "0223 Timeout while waiting for "
2530                                  "NameServer login\n");
2531                 /* Next look for NameServer ndlp */
2532                 ndlp = lpfc_findnode_did(vport, NameServer_DID);
2533                 if (ndlp)
2534                         lpfc_els_abort(phba, ndlp);
2535
2536                 /* ReStart discovery */
2537                 goto restart_disc;
2538
2539         case LPFC_NS_QRY:
2540         /* Check for wait for NameServer Rsp timeout */
2541                 lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
2542                                  "0224 NameServer Query timeout "
2543                                  "Data: x%x x%x\n",
2544                                  vport->fc_ns_retry, LPFC_MAX_NS_RETRY);
2545
2546                 if (vport->fc_ns_retry < LPFC_MAX_NS_RETRY) {
2547                         /* Try it one more time */
2548                         vport->fc_ns_retry++;
2549                         rc = lpfc_ns_cmd(vport, SLI_CTNS_GID_FT,
2550                                          vport->fc_ns_retry, 0);
2551                         if (rc == 0)
2552                                 break;
2553                 }
2554                 vport->fc_ns_retry = 0;
2555
2556 restart_disc:
2557                 /*
2558                  * Discovery is over.
2559                  * set port_state to PORT_READY if SLI2.
2560                  * cmpl_reg_vpi will set port_state to READY for SLI3.
2561                  */
2562                 if (phba->sli3_options & LPFC_SLI3_NPIV_ENABLED)
2563                         lpfc_issue_reg_vpi(phba, vport);
2564                 else  { /* NPIV Not enabled */
2565                         lpfc_issue_clear_la(phba, vport);
2566                         vport->port_state = LPFC_VPORT_READY;
2567                 }
2568
2569                 /* Setup and issue mailbox INITIALIZE LINK command */
2570                 initlinkmbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
2571                 if (!initlinkmbox) {
2572                         lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
2573                                          "0206 Device Discovery "
2574                                          "completion error\n");
2575                         phba->link_state = LPFC_HBA_ERROR;
2576                         break;
2577                 }
2578
2579                 lpfc_linkdown(phba);
2580                 lpfc_init_link(phba, initlinkmbox, phba->cfg_topology,
2581                                phba->cfg_link_speed);
2582                 initlinkmbox->mb.un.varInitLnk.lipsr_AL_PA = 0;
2583                 initlinkmbox->vport = vport;
2584                 initlinkmbox->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
2585                 rc = lpfc_sli_issue_mbox(phba, initlinkmbox, MBX_NOWAIT);
2586                 lpfc_set_loopback_flag(phba);
2587                 if (rc == MBX_NOT_FINISHED)
2588                         mempool_free(initlinkmbox, phba->mbox_mem_pool);
2589
2590                 break;
2591
2592         case LPFC_DISC_AUTH:
2593         /* Node Authentication timeout */
2594                 lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
2595                                  "0227 Node Authentication timeout\n");
2596                 lpfc_disc_flush_list(vport);
2597
2598                 /*
2599                  * set port_state to PORT_READY if SLI2.
2600                  * cmpl_reg_vpi will set port_state to READY for SLI3.
2601                  */
2602                 if (phba->sli3_options & LPFC_SLI3_NPIV_ENABLED)
2603                         lpfc_issue_reg_vpi(phba, vport);
2604                 else {  /* NPIV Not enabled */
2605                         lpfc_issue_clear_la(phba, vport);
2606                         vport->port_state = LPFC_VPORT_READY;
2607                 }
2608                 break;
2609
2610         case LPFC_VPORT_READY:
2611                 if (vport->fc_flag & FC_RSCN_MODE) {
2612                         lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
2613                                          "0231 RSCN timeout Data: x%x "
2614                                          "x%x\n",
2615                                          vport->fc_ns_retry, LPFC_MAX_NS_RETRY);
2616
2617                         /* Cleanup any outstanding ELS commands */
2618                         lpfc_els_flush_cmd(vport);
2619
2620                         lpfc_els_flush_rscn(vport);
2621                         lpfc_disc_flush_list(vport);
2622                 }
2623                 break;
2624
2625         default:
2626                 lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
2627                                  "0229 Unexpected discovery timeout, "
2628                                  "vport State x%x\n", vport->port_state);
2629                 break;
2630         }
2631
2632         switch (phba->link_state) {
2633         case LPFC_CLEAR_LA:
2634                                 /* CLEAR LA timeout */
2635                 lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
2636                                  "0228 CLEAR LA timeout\n");
2637                 clrlaerr = 1;
2638                 break;
2639
2640         case LPFC_LINK_UNKNOWN:
2641         case LPFC_WARM_START:
2642         case LPFC_INIT_START:
2643         case LPFC_INIT_MBX_CMDS:
2644         case LPFC_LINK_DOWN:
2645         case LPFC_LINK_UP:
2646         case LPFC_HBA_ERROR:
2647                 lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
2648                                  "0230 Unexpected timeout, hba link "
2649                                  "state x%x\n", phba->link_state);
2650                 clrlaerr = 1;
2651                 break;
2652
2653         case LPFC_HBA_READY:
2654                 break;
2655         }
2656
2657         if (clrlaerr) {
2658                 lpfc_disc_flush_list(vport);
2659                 psli->ring[(psli->extra_ring)].flag &= ~LPFC_STOP_IOCB_EVENT;
2660                 psli->ring[(psli->fcp_ring)].flag &= ~LPFC_STOP_IOCB_EVENT;
2661                 psli->ring[(psli->next_ring)].flag &= ~LPFC_STOP_IOCB_EVENT;
2662                 vport->port_state = LPFC_VPORT_READY;
2663         }
2664
2665         return;
2666 }
2667
2668 /*
2669  * This routine handles processing a NameServer REG_LOGIN mailbox
2670  * command upon completion. It is setup in the LPFC_MBOXQ
2671  * as the completion routine when the command is
2672  * handed off to the SLI layer.
2673  */
2674 void
2675 lpfc_mbx_cmpl_fdmi_reg_login(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
2676 {
2677         MAILBOX_t *mb = &pmb->mb;
2678         struct lpfc_dmabuf   *mp = (struct lpfc_dmabuf *) (pmb->context1);
2679         struct lpfc_nodelist *ndlp = (struct lpfc_nodelist *) pmb->context2;
2680         struct lpfc_vport    *vport = pmb->vport;
2681
2682         pmb->context1 = NULL;
2683
2684         ndlp->nlp_rpi = mb->un.varWords[0];
2685         ndlp->nlp_type |= NLP_FABRIC;
2686         lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
2687
2688         /*
2689          * Start issuing Fabric-Device Management Interface (FDMI) command to
2690          * 0xfffffa (FDMI well known port) or Delay issuing FDMI command if
2691          * fdmi-on=2 (supporting RPA/hostnmae)
2692          */
2693
2694         if (vport->cfg_fdmi_on == 1)
2695                 lpfc_fdmi_cmd(vport, ndlp, SLI_MGMT_DHBA);
2696         else
2697                 mod_timer(&vport->fc_fdmitmo, jiffies + HZ * 60);
2698
2699                                 /* Mailbox took a reference to the node */
2700         lpfc_nlp_put(ndlp);
2701         lpfc_mbuf_free(phba, mp->virt, mp->phys);
2702         kfree(mp);
2703         mempool_free(pmb, phba->mbox_mem_pool);
2704
2705         return;
2706 }
2707
2708 static int
2709 lpfc_filter_by_rpi(struct lpfc_nodelist *ndlp, void *param)
2710 {
2711         uint16_t *rpi = param;
2712
2713         return ndlp->nlp_rpi == *rpi;
2714 }
2715
2716 static int
2717 lpfc_filter_by_wwpn(struct lpfc_nodelist *ndlp, void *param)
2718 {
2719         return memcmp(&ndlp->nlp_portname, param,
2720                       sizeof(ndlp->nlp_portname)) == 0;
2721 }
2722
2723 struct lpfc_nodelist *
2724 __lpfc_find_node(struct lpfc_vport *vport, node_filter filter, void *param)
2725 {
2726         struct lpfc_nodelist *ndlp;
2727
2728         list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
2729                 if (filter(ndlp, param))
2730                         return ndlp;
2731         }
2732         return NULL;
2733 }
2734
2735 /*
2736  * Search node lists for a remote port matching filter criteria
2737  * Caller needs to hold host_lock before calling this routine.
2738  */
2739 struct lpfc_nodelist *
2740 lpfc_find_node(struct lpfc_vport *vport, node_filter filter, void *param)
2741 {
2742         struct Scsi_Host     *shost = lpfc_shost_from_vport(vport);
2743         struct lpfc_nodelist *ndlp;
2744
2745         spin_lock_irq(shost->host_lock);
2746         ndlp = __lpfc_find_node(vport, filter, param);
2747         spin_unlock_irq(shost->host_lock);
2748         return ndlp;
2749 }
2750
2751 /*
2752  * This routine looks up the ndlp lists for the given RPI. If rpi found it
2753  * returns the node list element pointer else return NULL.
2754  */
2755 struct lpfc_nodelist *
2756 __lpfc_findnode_rpi(struct lpfc_vport *vport, uint16_t rpi)
2757 {
2758         return __lpfc_find_node(vport, lpfc_filter_by_rpi, &rpi);
2759 }
2760
2761 struct lpfc_nodelist *
2762 lpfc_findnode_rpi(struct lpfc_vport *vport, uint16_t rpi)
2763 {
2764         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
2765         struct lpfc_nodelist *ndlp;
2766
2767         spin_lock_irq(shost->host_lock);
2768         ndlp = __lpfc_findnode_rpi(vport, rpi);
2769         spin_unlock_irq(shost->host_lock);
2770         return ndlp;
2771 }
2772
2773 /*
2774  * This routine looks up the ndlp lists for the given WWPN. If WWPN found it
2775  * returns the node element list pointer else return NULL.
2776  */
2777 struct lpfc_nodelist *
2778 lpfc_findnode_wwpn(struct lpfc_vport *vport, struct lpfc_name *wwpn)
2779 {
2780         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
2781         struct lpfc_nodelist *ndlp;
2782
2783         spin_lock_irq(shost->host_lock);
2784         ndlp = __lpfc_find_node(vport, lpfc_filter_by_wwpn, wwpn);
2785         spin_unlock_irq(shost->host_lock);
2786         return ndlp;
2787 }
2788
2789 void
2790 lpfc_nlp_init(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
2791               uint32_t did)
2792 {
2793         memset(ndlp, 0, sizeof (struct lpfc_nodelist));
2794         INIT_LIST_HEAD(&ndlp->els_retry_evt.evt_listp);
2795         INIT_LIST_HEAD(&ndlp->dev_loss_evt.evt_listp);
2796         init_timer(&ndlp->nlp_delayfunc);
2797         ndlp->nlp_delayfunc.function = lpfc_els_retry_delay;
2798         ndlp->nlp_delayfunc.data = (unsigned long)ndlp;
2799         ndlp->nlp_DID = did;
2800         ndlp->vport = vport;
2801         ndlp->nlp_sid = NLP_NO_SID;
2802         INIT_LIST_HEAD(&ndlp->nlp_listp);
2803         kref_init(&ndlp->kref);
2804
2805         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_NODE,
2806                 "node init:       did:x%x",
2807                 ndlp->nlp_DID, 0, 0);
2808
2809         return;
2810 }
2811
2812 /* This routine releases all resources associated with a specifc NPort's ndlp
2813  * and mempool_free's the nodelist.
2814  */
2815 static void
2816 lpfc_nlp_release(struct kref *kref)
2817 {
2818         struct lpfc_nodelist *ndlp = container_of(kref, struct lpfc_nodelist,
2819                                                   kref);
2820
2821         lpfc_debugfs_disc_trc(ndlp->vport, LPFC_DISC_TRC_NODE,
2822                 "node release:    did:x%x flg:x%x type:x%x",
2823                 ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_type);
2824
2825         lpfc_nlp_remove(ndlp->vport, ndlp);
2826         mempool_free(ndlp, ndlp->vport->phba->nlp_mem_pool);
2827 }
2828
2829 /* This routine bumps the reference count for a ndlp structure to ensure
2830  * that one discovery thread won't free a ndlp while another discovery thread
2831  * is using it.
2832  */
2833 struct lpfc_nodelist *
2834 lpfc_nlp_get(struct lpfc_nodelist *ndlp)
2835 {
2836         if (ndlp) {
2837                 lpfc_debugfs_disc_trc(ndlp->vport, LPFC_DISC_TRC_NODE,
2838                         "node get:        did:x%x flg:x%x refcnt:x%x",
2839                         ndlp->nlp_DID, ndlp->nlp_flag,
2840                         atomic_read(&ndlp->kref.refcount));
2841                 kref_get(&ndlp->kref);
2842         }
2843         return ndlp;
2844 }
2845
2846
2847 /* This routine decrements the reference count for a ndlp structure. If the
2848  * count goes to 0, this indicates the the associated nodelist should be freed.
2849  */
2850 int
2851 lpfc_nlp_put(struct lpfc_nodelist *ndlp)
2852 {
2853         if (ndlp) {
2854                 lpfc_debugfs_disc_trc(ndlp->vport, LPFC_DISC_TRC_NODE,
2855                 "node put:        did:x%x flg:x%x refcnt:x%x",
2856                         ndlp->nlp_DID, ndlp->nlp_flag,
2857                         atomic_read(&ndlp->kref.refcount));
2858         }
2859         return ndlp ? kref_put(&ndlp->kref, lpfc_nlp_release) : 0;
2860 }
2861
2862 /* This routine free's the specified nodelist if it is not in use
2863  * by any other discovery thread. This routine returns 1 if the ndlp
2864  * is not being used by anyone and has been freed. A return value of
2865  * 0 indicates it is being used by another discovery thread and the
2866  * refcount is left unchanged.
2867  */
2868 int
2869 lpfc_nlp_not_used(struct lpfc_nodelist *ndlp)
2870 {
2871         lpfc_debugfs_disc_trc(ndlp->vport, LPFC_DISC_TRC_NODE,
2872                 "node not used:   did:x%x flg:x%x refcnt:x%x",
2873                 ndlp->nlp_DID, ndlp->nlp_flag,
2874                 atomic_read(&ndlp->kref.refcount));
2875
2876         if (atomic_read(&ndlp->kref.refcount) == 1) {
2877                 lpfc_nlp_put(ndlp);
2878                 return 1;
2879         }
2880         return 0;
2881 }
2882