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         int  put_node;
 112         int  put_rport;
 113
 114         rdata = rport->dd_data;
 115         ndlp = rdata->pnode;
 116
 117         if (!ndlp) {
 118                 if (rport->scsi_target_id != -1) {
 119                         printk(KERN_ERR "Cannot find remote node"
 120                                 " for rport in dev_loss_tmo_callbk x%x\n",
 121                                 rport->port_id);
 122                 }
 123                 return;
 124         }
 125
 126         vport = ndlp->vport;
 127         phba  = vport->phba;
 128
 129         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_RPORT,
 130                 "rport devlosscb: sid:x%x did:x%x flg:x%x",
 131                 ndlp->nlp_sid, ndlp->nlp_DID, ndlp->nlp_flag);
 132
 133         /* Don't defer this if we are in the process of deleting the vport
 134          * or unloading the driver. The unload will cleanup the node
 135          * appropriately we just need to cleanup the ndlp rport info here.
 136          */
 137         if (vport->load_flag & FC_UNLOADING) {
 138                 put_node = rdata->pnode != NULL;
 139                 put_rport = ndlp->rport != NULL;
 140                 rdata->pnode = NULL;
 141                 ndlp->rport = NULL;
 142                 if (put_node)
 143                         lpfc_nlp_put(ndlp);
 144                 if (put_rport)
 145                         put_device(&rport->dev);
 146                 return;
 147         }
 148
 149         if (ndlp->nlp_state == NLP_STE_MAPPED_NODE)
 150                 return;
 151
 152         evtp = &ndlp->dev_loss_evt;
 153
 154         if (!list_empty(&evtp->evt_listp))
 155                 return;
 156
 157         spin_lock_irq(&phba->hbalock);
 158         evtp->evt_arg1  = ndlp;
 159         evtp->evt       = LPFC_EVT_DEV_LOSS;
 160         list_add_tail(&evtp->evt_listp, &phba->work_list);
 161         if (phba->work_wait)
 162                 wake_up(phba->work_wait);
 163
 164         spin_unlock_irq(&phba->hbalock);
 165
 166         return;
 167 }
 168
 169 /*
 170  * This function is called from the worker thread when dev_loss_tmo
 171  * expire.
 172  */
 173 void
 174 lpfc_dev_loss_tmo_handler(struct lpfc_nodelist *ndlp)
 175 {
 176         struct lpfc_rport_data *rdata;
 177         struct fc_rport   *rport;
 178         struct lpfc_vport *vport;
 179         struct lpfc_hba   *phba;
 180         uint8_t *name;
 181         int  put_node;
 182         int  put_rport;
 183         int warn_on = 0;
 184
 185         rport = ndlp->rport;
 186
 187         if (!rport)
 188                 return;
 189
 190         rdata = rport->dd_data;
 191         name = (uint8_t *) &ndlp->nlp_portname;
 192         vport = ndlp->vport;
 193         phba  = vport->phba;
 194
 195         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_RPORT,
 196                 "rport devlosstmo:did:x%x type:x%x id:x%x",
 197                 ndlp->nlp_DID, ndlp->nlp_type, rport->scsi_target_id);
 198
 199         /* Don't defer this if we are in the process of deleting the vport
 200          * or unloading the driver. The unload will cleanup the node
 201          * appropriately we just need to cleanup the ndlp rport info here.
 202          */
 203         if (vport->load_flag & FC_UNLOADING) {
 204                 put_node = rdata->pnode != NULL;
 205                 put_rport = ndlp->rport != NULL;
 206                 rdata->pnode = NULL;
 207                 ndlp->rport = NULL;
 208                 if (put_node)
 209                         lpfc_nlp_put(ndlp);
 210                 if (put_rport)
 211                         put_device(&rport->dev);
 212                 return;
 213         }
 214
 215         if (ndlp->nlp_state == NLP_STE_MAPPED_NODE)
 216                 return;
 217
 218         if (ndlp->nlp_type & NLP_FABRIC) {
 219                 /* We will clean up these Nodes in linkup */
 220                 put_node = rdata->pnode != NULL;
 221                 put_rport = ndlp->rport != NULL;
 222                 rdata->pnode = NULL;
 223                 ndlp->rport = NULL;
 224                 if (put_node)
 225                         lpfc_nlp_put(ndlp);
 226                 if (put_rport)
 227                         put_device(&rport->dev);
 228                 return;
 229         }
 230
 231         if (ndlp->nlp_sid != NLP_NO_SID) {
 232                 warn_on = 1;
 233                 /* flush the target */
 234                 lpfc_sli_abort_iocb(vport, &phba->sli.ring[phba->sli.fcp_ring],
 235                                     ndlp->nlp_sid, 0, LPFC_CTX_TGT);
 236         }
 237         if (vport->load_flag & FC_UNLOADING)
 238                 warn_on = 0;
 239
 240         if (warn_on) {
 241                 lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
 242                                  "0203 Devloss timeout on "
 243                                  "WWPN %x:%x:%x:%x:%x:%x:%x:%x "
 244                                  "NPort x%x Data: x%x x%x x%x\n",
 245                                  *name, *(name+1), *(name+2), *(name+3),
 246                                  *(name+4), *(name+5), *(name+6), *(name+7),
 247                                  ndlp->nlp_DID, ndlp->nlp_flag,
 248                                  ndlp->nlp_state, ndlp->nlp_rpi);
 249         } else {
 250                 lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
 251                                  "0204 Devloss timeout on "
 252                                  "WWPN %x:%x:%x:%x:%x:%x:%x:%x "
 253                                  "NPort x%x Data: x%x x%x x%x\n",
 254                                  *name, *(name+1), *(name+2), *(name+3),
 255                                  *(name+4), *(name+5), *(name+6), *(name+7),
 256                                  ndlp->nlp_DID, ndlp->nlp_flag,
 257                                  ndlp->nlp_state, ndlp->nlp_rpi);
 258         }
 259
 260         put_node = rdata->pnode != NULL;
 261         put_rport = ndlp->rport != NULL;
 262         rdata->pnode = NULL;
 263         ndlp->rport = NULL;
 264         if (put_node)
 265                 lpfc_nlp_put(ndlp);
 266         if (put_rport)
 267                 put_device(&rport->dev);
 268
 269         if (!(vport->load_flag & FC_UNLOADING) &&
 270             !(ndlp->nlp_flag & NLP_DELAY_TMO) &&
 271             !(ndlp->nlp_flag & NLP_NPR_2B_DISC) &&
 272             (ndlp->nlp_state != NLP_STE_UNMAPPED_NODE)) {
 273                 lpfc_disc_state_machine(vport, ndlp, NULL, NLP_EVT_DEVICE_RM);
 274         }
 275 }
 276
 277
 278 void
 279 lpfc_worker_wake_up(struct lpfc_hba *phba)
 280 {
 281         wake_up(phba->work_wait);
 282         return;
 283 }
 284
 285 static void
 286 lpfc_work_list_done(struct lpfc_hba *phba)
 287 {
 288         struct lpfc_work_evt  *evtp = NULL;
 289         struct lpfc_nodelist  *ndlp;
 290         int free_evt;
 291
 292         spin_lock_irq(&phba->hbalock);
 293         while (!list_empty(&phba->work_list)) {
 294                 list_remove_head((&phba->work_list), evtp, typeof(*evtp),
 295                                  evt_listp);
 296                 spin_unlock_irq(&phba->hbalock);
 297                 free_evt = 1;
 298                 switch (evtp->evt) {
 299                 case LPFC_EVT_ELS_RETRY:
 300                         ndlp = (struct lpfc_nodelist *) (evtp->evt_arg1);
 301                         lpfc_els_retry_delay_handler(ndlp);
 302                         free_evt = 0; /* evt is part of ndlp */
 303                         break;
 304                 case LPFC_EVT_DEV_LOSS:
 305                         ndlp = (struct lpfc_nodelist *)(evtp->evt_arg1);
 306                         lpfc_nlp_get(ndlp);
 307                         lpfc_dev_loss_tmo_handler(ndlp);
 308                         free_evt = 0;
 309                         lpfc_nlp_put(ndlp);
 310                         break;
 311                 case LPFC_EVT_ONLINE:
 312                         if (phba->link_state < LPFC_LINK_DOWN)
 313                                 *(int *) (evtp->evt_arg1) = lpfc_online(phba);
 314                         else
 315                                 *(int *) (evtp->evt_arg1) = 0;
 316                         complete((struct completion *)(evtp->evt_arg2));
 317                         break;
 318                 case LPFC_EVT_OFFLINE_PREP:
 319                         if (phba->link_state >= LPFC_LINK_DOWN)
 320                                 lpfc_offline_prep(phba);
 321                         *(int *)(evtp->evt_arg1) = 0;
 322                         complete((struct completion *)(evtp->evt_arg2));
 323                         break;
 324                 case LPFC_EVT_OFFLINE:
 325                         lpfc_offline(phba);
 326                         lpfc_sli_brdrestart(phba);
 327                         *(int *)(evtp->evt_arg1) =
 328                                 lpfc_sli_brdready(phba, HS_FFRDY | HS_MBRDY);
 329                         lpfc_unblock_mgmt_io(phba);
 330                         complete((struct completion *)(evtp->evt_arg2));
 331                         break;
 332                 case LPFC_EVT_WARM_START:
 333                         lpfc_offline(phba);
 334                         lpfc_reset_barrier(phba);
 335                         lpfc_sli_brdreset(phba);
 336                         lpfc_hba_down_post(phba);
 337                         *(int *)(evtp->evt_arg1) =
 338                                 lpfc_sli_brdready(phba, HS_MBRDY);
 339                         lpfc_unblock_mgmt_io(phba);
 340                         complete((struct completion *)(evtp->evt_arg2));
 341                         break;
 342                 case LPFC_EVT_KILL:
 343                         lpfc_offline(phba);
 344                         *(int *)(evtp->evt_arg1)
 345                                 = (phba->pport->stopped)
 346                                         ? 0 : lpfc_sli_brdkill(phba);
 347                         lpfc_unblock_mgmt_io(phba);
 348                         complete((struct completion *)(evtp->evt_arg2));
 349                         break;
 350                 }
 351                 if (free_evt)
 352                         kfree(evtp);
 353                 spin_lock_irq(&phba->hbalock);
 354         }
 355         spin_unlock_irq(&phba->hbalock);
 356
 357 }
 358
 359 static void
 360 lpfc_work_done(struct lpfc_hba *phba)
 361 {
 362         struct lpfc_sli_ring *pring;
 363         uint32_t ha_copy, status, control, work_port_events;
 364         struct lpfc_vport **vports;
 365         struct lpfc_vport *vport;
 366         int i;
 367
 368         spin_lock_irq(&phba->hbalock);
 369         ha_copy = phba->work_ha;
 370         phba->work_ha = 0;
 371         spin_unlock_irq(&phba->hbalock);
 372
 373         if (ha_copy & HA_ERATT)
 374                 lpfc_handle_eratt(phba);
 375
 376         if (ha_copy & HA_MBATT)
 377                 lpfc_sli_handle_mb_event(phba);
 378
 379         if (ha_copy & HA_LATT)
 380                 lpfc_handle_latt(phba);
 381         vports = lpfc_create_vport_work_array(phba);
 382         if (vports != NULL)
 383                 for(i = 0; i < LPFC_MAX_VPORTS; i++) {
 384                         /*
 385                          * We could have no vports in array if unloading, so if
 386                          * this happens then just use the pport
 387                          */
 388                         if (vports[i] == NULL && i == 0)
 389                                 vport = phba->pport;
 390                         else
 391                                 vport = vports[i];
 392                         if (vport == NULL)
 393                                 break;
 394                         work_port_events = vport->work_port_events;
 395                         if (work_port_events & WORKER_DISC_TMO)
 396                                 lpfc_disc_timeout_handler(vport);
 397                         if (work_port_events & WORKER_ELS_TMO)
 398                                 lpfc_els_timeout_handler(vport);
 399                         if (work_port_events & WORKER_HB_TMO)
 400                                 lpfc_hb_timeout_handler(phba);
 401                         if (work_port_events & WORKER_MBOX_TMO)
 402                                 lpfc_mbox_timeout_handler(phba);
 403                         if (work_port_events & WORKER_FABRIC_BLOCK_TMO)
 404                                 lpfc_unblock_fabric_iocbs(phba);
 405                         if (work_port_events & WORKER_FDMI_TMO)
 406                                 lpfc_fdmi_timeout_handler(vport);
 407                         if (work_port_events & WORKER_RAMP_DOWN_QUEUE)
 408                                 lpfc_ramp_down_queue_handler(phba);
 409                         if (work_port_events & WORKER_RAMP_UP_QUEUE)
 410                                 lpfc_ramp_up_queue_handler(phba);
 411                         spin_lock_irq(&vport->work_port_lock);
 412                         vport->work_port_events &= ~work_port_events;
 413                         spin_unlock_irq(&vport->work_port_lock);
 414                 }
 415         lpfc_destroy_vport_work_array(vports);
 416
 417         pring = &phba->sli.ring[LPFC_ELS_RING];
 418         status = (ha_copy & (HA_RXMASK  << (4*LPFC_ELS_RING)));
 419         status >>= (4*LPFC_ELS_RING);
 420         if ((status & HA_RXMASK)
 421                 || (pring->flag & LPFC_DEFERRED_RING_EVENT)) {
 422                 if (pring->flag & LPFC_STOP_IOCB_EVENT) {
 423                         pring->flag |= LPFC_DEFERRED_RING_EVENT;
 424                 } else {
 425                         lpfc_sli_handle_slow_ring_event(phba, pring,
 426                                                         (status &
 427                                                          HA_RXMASK));
 428                         pring->flag &= ~LPFC_DEFERRED_RING_EVENT;
 429                 }
 430                 /*
 431                  * Turn on Ring interrupts
 432                  */
 433                 spin_lock_irq(&phba->hbalock);
 434                 control = readl(phba->HCregaddr);
 435                 if (!(control & (HC_R0INT_ENA << LPFC_ELS_RING))) {
 436                         lpfc_debugfs_slow_ring_trc(phba,
 437                                 "WRK Enable ring: cntl:x%x hacopy:x%x",
 438                                 control, ha_copy, 0);
 439
 440                         control |= (HC_R0INT_ENA << LPFC_ELS_RING);
 441                         writel(control, phba->HCregaddr);
 442                         readl(phba->HCregaddr); /* flush */
 443                 }
 444                 else {
 445                         lpfc_debugfs_slow_ring_trc(phba,
 446                                 "WRK Ring ok:     cntl:x%x hacopy:x%x",
 447                                 control, ha_copy, 0);
 448                 }
 449                 spin_unlock_irq(&phba->hbalock);
 450         }
 451         lpfc_work_list_done(phba);
 452 }
 453
 454 static int
 455 check_work_wait_done(struct lpfc_hba *phba)
 456 {
 457         struct lpfc_vport *vport;
 458         struct lpfc_sli_ring *pring = &phba->sli.ring[LPFC_ELS_RING];
 459         int rc = 0;
 460
 461         spin_lock_irq(&phba->hbalock);
 462         list_for_each_entry(vport, &phba->port_list, listentry) {
 463                 if (vport->work_port_events) {
 464                         rc = 1;
 465                         break;
 466                 }
 467         }
 468         if (rc || phba->work_ha || (!list_empty(&phba->work_list)) ||
 469             kthread_should_stop() || pring->flag & LPFC_DEFERRED_RING_EVENT) {
 470                 rc = 1;
 471                 phba->work_found++;
 472         } else
 473                 phba->work_found = 0;
 474         spin_unlock_irq(&phba->hbalock);
 475         return rc;
 476 }
 477
 478
 479 int
 480 lpfc_do_work(void *p)
 481 {
 482         struct lpfc_hba *phba = p;
 483         int rc;
 484         DECLARE_WAIT_QUEUE_HEAD_ONSTACK(work_waitq);
 485
 486         set_user_nice(current, -20);
 487         phba->work_wait = &work_waitq;
 488         phba->work_found = 0;
 489
 490         while (1) {
 491
 492                 rc = wait_event_interruptible(work_waitq,
 493                                               check_work_wait_done(phba));
 494
 495                 BUG_ON(rc);
 496
 497                 if (kthread_should_stop())
 498                         break;
 499
 500                 lpfc_work_done(phba);
 501
 502                 /* If there is alot of slow ring work, like during link up
 503                  * check_work_wait_done() may cause this thread to not give
 504                  * up the CPU for very long periods of time. This may cause
 505                  * soft lockups or other problems. To avoid these situations
 506                  * give up the CPU here after LPFC_MAX_WORKER_ITERATION
 507                  * consecutive iterations.
 508                  */
 509                 if (phba->work_found >= LPFC_MAX_WORKER_ITERATION) {
 510                         phba->work_found = 0;
 511                         schedule();
 512                 }
 513         }
 514         phba->work_wait = NULL;
 515         return 0;
 516 }
 517
 518 /*
 519  * This is only called to handle FC worker events. Since this a rare
 520  * occurance, we allocate a struct lpfc_work_evt structure here instead of
 521  * embedding it in the IOCB.
 522  */
 523 int
 524 lpfc_workq_post_event(struct lpfc_hba *phba, void *arg1, void *arg2,
 525                       uint32_t evt)
 526 {
 527         struct lpfc_work_evt  *evtp;
 528         unsigned long flags;
 529
 530         /*
 531          * All Mailbox completions and LPFC_ELS_RING rcv ring IOCB events will
 532          * be queued to worker thread for processing
 533          */
 534         evtp = kmalloc(sizeof(struct lpfc_work_evt), GFP_ATOMIC);
 535         if (!evtp)
 536                 return 0;
 537
 538         evtp->evt_arg1  = arg1;
 539         evtp->evt_arg2  = arg2;
 540         evtp->evt       = evt;
 541
 542         spin_lock_irqsave(&phba->hbalock, flags);
 543         list_add_tail(&evtp->evt_listp, &phba->work_list);
 544         if (phba->work_wait)
 545                 lpfc_worker_wake_up(phba);
 546         spin_unlock_irqrestore(&phba->hbalock, flags);
 547
 548         return 1;
 549 }
 550
 551 void
 552 lpfc_cleanup_rpis(struct lpfc_vport *vport, int remove)
 553 {
 554         struct lpfc_hba  *phba = vport->phba;
 555         struct lpfc_nodelist *ndlp, *next_ndlp;
 556         int  rc;
 557
 558         list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) {
 559                 if (ndlp->nlp_state == NLP_STE_UNUSED_NODE)
 560                         continue;
 561
 562                 if ((phba->sli3_options & LPFC_SLI3_VPORT_TEARDOWN) ||
 563                         ((vport->port_type == LPFC_NPIV_PORT) &&
 564                         (ndlp->nlp_DID == NameServer_DID)))
 565                         lpfc_unreg_rpi(vport, ndlp);
 566
 567                 /* Leave Fabric nodes alone on link down */
 568                 if (!remove && ndlp->nlp_type & NLP_FABRIC)
 569                         continue;
 570                 rc = lpfc_disc_state_machine(vport, ndlp, NULL,
 571                                              remove
 572                                              ? NLP_EVT_DEVICE_RM
 573                                              : NLP_EVT_DEVICE_RECOVERY);
 574         }
 575         if (phba->sli3_options & LPFC_SLI3_VPORT_TEARDOWN) {
 576                 lpfc_mbx_unreg_vpi(vport);
 577                 vport->fc_flag |= FC_VPORT_NEEDS_REG_VPI;
 578         }
 579 }
 580
 581 void
 582 lpfc_port_link_failure(struct lpfc_vport *vport)
 583 {
 584         /* Cleanup any outstanding RSCN activity */
 585         lpfc_els_flush_rscn(vport);
 586
 587         /* Cleanup any outstanding ELS commands */
 588         lpfc_els_flush_cmd(vport);
 589
 590         lpfc_cleanup_rpis(vport, 0);
 591
 592         /* Turn off discovery timer if its running */
 593         lpfc_can_disctmo(vport);
 594 }
 595
 596 static void
 597 lpfc_linkdown_port(struct lpfc_vport *vport)
 598 {
 599         struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
 600
 601         fc_host_post_event(shost, fc_get_event_number(), FCH_EVT_LINKDOWN, 0);
 602
 603         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
 604                 "Link Down:       state:x%x rtry:x%x flg:x%x",
 605                 vport->port_state, vport->fc_ns_retry, vport->fc_flag);
 606
 607         lpfc_port_link_failure(vport);
 608
 609 }
 610
 611 int
 612 lpfc_linkdown(struct lpfc_hba *phba)
 613 {
 614         struct lpfc_vport *vport = phba->pport;
 615         struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
 616         struct lpfc_vport **vports;
 617         LPFC_MBOXQ_t          *mb;
 618         int i;
 619
 620         if (phba->link_state == LPFC_LINK_DOWN) {
 621                 return 0;
 622         }
 623         spin_lock_irq(&phba->hbalock);
 624         if (phba->link_state > LPFC_LINK_DOWN) {
 625                 phba->link_state = LPFC_LINK_DOWN;
 626                 phba->pport->fc_flag &= ~FC_LBIT;
 627         }
 628         spin_unlock_irq(&phba->hbalock);
 629         vports = lpfc_create_vport_work_array(phba);
 630         if (vports != NULL)
 631                 for(i = 0; i < LPFC_MAX_VPORTS && vports[i] != NULL; i++) {
 632                         /* Issue a LINK DOWN event to all nodes */
 633                         lpfc_linkdown_port(vports[i]);
 634                 }
 635         lpfc_destroy_vport_work_array(vports);
 636         /* Clean up any firmware default rpi's */
 637         mb = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
 638         if (mb) {
 639                 lpfc_unreg_did(phba, 0xffff, 0xffffffff, mb);
 640                 mb->vport = vport;
 641                 mb->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
 642                 if (lpfc_sli_issue_mbox(phba, mb, MBX_NOWAIT)
 643                     == MBX_NOT_FINISHED) {
 644                         mempool_free(mb, phba->mbox_mem_pool);
 645                 }
 646         }
 647
 648         /* Setup myDID for link up if we are in pt2pt mode */
 649         if (phba->pport->fc_flag & FC_PT2PT) {
 650                 phba->pport->fc_myDID = 0;
 651                 mb = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
 652                 if (mb) {
 653                         lpfc_config_link(phba, mb);
 654                         mb->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
 655                         mb->vport = vport;
 656                         if (lpfc_sli_issue_mbox(phba, mb, MBX_NOWAIT)
 657                             == MBX_NOT_FINISHED) {
 658                                 mempool_free(mb, phba->mbox_mem_pool);
 659                         }
 660                 }
 661                 spin_lock_irq(shost->host_lock);
 662                 phba->pport->fc_flag &= ~(FC_PT2PT | FC_PT2PT_PLOGI);
 663                 spin_unlock_irq(shost->host_lock);
 664         }
 665
 666         return 0;
 667 }
 668
 669 static void
 670 lpfc_linkup_cleanup_nodes(struct lpfc_vport *vport)
 671 {
 672         struct lpfc_nodelist *ndlp;
 673
 674         list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
 675                 if (ndlp->nlp_state == NLP_STE_UNUSED_NODE)
 676                         continue;
 677
 678                 if (ndlp->nlp_type & NLP_FABRIC) {
 679                                 /* On Linkup its safe to clean up the ndlp
 680                                  * from Fabric connections.
 681                                  */
 682                         if (ndlp->nlp_DID != Fabric_DID)
 683                                 lpfc_unreg_rpi(vport, ndlp);
 684                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
 685                 } else if (!(ndlp->nlp_flag & NLP_NPR_ADISC)) {
 686                                 /* Fail outstanding IO now since device is
 687                                  * marked for PLOGI.
 688                                  */
 689                         lpfc_unreg_rpi(vport, ndlp);
 690                 }
 691         }
 692 }
 693
 694 static void
 695 lpfc_linkup_port(struct lpfc_vport *vport)
 696 {
 697         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
 698         struct lpfc_hba  *phba = vport->phba;
 699
 700         if ((vport->load_flag & FC_UNLOADING) != 0)
 701                 return;
 702
 703         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
 704                 "Link Up:         top:x%x speed:x%x flg:x%x",
 705                 phba->fc_topology, phba->fc_linkspeed, phba->link_flag);
 706
 707         /* If NPIV is not enabled, only bring the physical port up */
 708         if (!(phba->sli3_options & LPFC_SLI3_NPIV_ENABLED) &&
 709                 (vport != phba->pport))
 710                 return;
 711
 712         fc_host_post_event(shost, fc_get_event_number(), FCH_EVT_LINKUP, 0);
 713
 714         spin_lock_irq(shost->host_lock);
 715         vport->fc_flag &= ~(FC_PT2PT | FC_PT2PT_PLOGI | FC_ABORT_DISCOVERY |
 716                             FC_RSCN_MODE | FC_NLP_MORE | FC_RSCN_DISCOVERY);
 717         vport->fc_flag |= FC_NDISC_ACTIVE;
 718         vport->fc_ns_retry = 0;
 719         spin_unlock_irq(shost->host_lock);
 720
 721         if (vport->fc_flag & FC_LBIT)
 722                 lpfc_linkup_cleanup_nodes(vport);
 723
 724 }
 725
 726 static int
 727 lpfc_linkup(struct lpfc_hba *phba)
 728 {
 729         struct lpfc_vport **vports;
 730         int i;
 731
 732         phba->link_state = LPFC_LINK_UP;
 733
 734         /* Unblock fabric iocbs if they are blocked */
 735         clear_bit(FABRIC_COMANDS_BLOCKED, &phba->bit_flags);
 736         del_timer_sync(&phba->fabric_block_timer);
 737
 738         vports = lpfc_create_vport_work_array(phba);
 739         if (vports != NULL)
 740                 for(i = 0; i < LPFC_MAX_VPORTS && vports[i] != NULL; i++)
 741                         lpfc_linkup_port(vports[i]);
 742         lpfc_destroy_vport_work_array(vports);
 743         if (phba->sli3_options & LPFC_SLI3_NPIV_ENABLED)
 744                 lpfc_issue_clear_la(phba, phba->pport);
 745
 746         return 0;
 747 }
 748
 749 /*
 750  * This routine handles processing a CLEAR_LA mailbox
 751  * command upon completion. It is setup in the LPFC_MBOXQ
 752  * as the completion routine when the command is
 753  * handed off to the SLI layer.
 754  */
 755 void
 756 lpfc_mbx_cmpl_clear_la(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
 757 {
 758         struct lpfc_vport *vport = pmb->vport;
 759         struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
 760         struct lpfc_sli   *psli = &phba->sli;
 761         MAILBOX_t *mb = &pmb->mb;
 762         uint32_t control;
 763
 764         /* Since we don't do discovery right now, turn these off here */
 765         psli->ring[psli->extra_ring].flag &= ~LPFC_STOP_IOCB_EVENT;
 766         psli->ring[psli->fcp_ring].flag &= ~LPFC_STOP_IOCB_EVENT;
 767         psli->ring[psli->next_ring].flag &= ~LPFC_STOP_IOCB_EVENT;
 768
 769         /* Check for error */
 770         if ((mb->mbxStatus) && (mb->mbxStatus != 0x1601)) {
 771                 /* CLEAR_LA mbox error <mbxStatus> state <hba_state> */
 772                 lpfc_printf_vlog(vport, KERN_ERR, LOG_MBOX,
 773                                  "0320 CLEAR_LA mbxStatus error x%x hba "
 774                                  "state x%x\n",
 775                                  mb->mbxStatus, vport->port_state);
 776                 phba->link_state = LPFC_HBA_ERROR;
 777                 goto out;
 778         }
 779
 780         if (vport->port_type == LPFC_PHYSICAL_PORT)
 781                 phba->link_state = LPFC_HBA_READY;
 782
 783         spin_lock_irq(&phba->hbalock);
 784         psli->sli_flag |= LPFC_PROCESS_LA;
 785         control = readl(phba->HCregaddr);
 786         control |= HC_LAINT_ENA;
 787         writel(control, phba->HCregaddr);
 788         readl(phba->HCregaddr); /* flush */
 789         spin_unlock_irq(&phba->hbalock);
 790         return;
 791
 792         vport->num_disc_nodes = 0;
 793         /* go thru NPR nodes and issue ELS PLOGIs */
 794         if (vport->fc_npr_cnt)
 795                 lpfc_els_disc_plogi(vport);
 796
 797         if (!vport->num_disc_nodes) {
 798                 spin_lock_irq(shost->host_lock);
 799                 vport->fc_flag &= ~FC_NDISC_ACTIVE;
 800                 spin_unlock_irq(shost->host_lock);
 801         }
 802
 803         vport->port_state = LPFC_VPORT_READY;
 804
 805 out:
 806         /* Device Discovery completes */
 807         lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
 808                          "0225 Device Discovery completes\n");
 809         mempool_free(pmb, phba->mbox_mem_pool);
 810
 811         spin_lock_irq(shost->host_lock);
 812         vport->fc_flag &= ~(FC_ABORT_DISCOVERY | FC_ESTABLISH_LINK);
 813         spin_unlock_irq(shost->host_lock);
 814
 815         del_timer_sync(&phba->fc_estabtmo);
 816
 817         lpfc_can_disctmo(vport);
 818
 819         /* turn on Link Attention interrupts */
 820
 821         spin_lock_irq(&phba->hbalock);
 822         psli->sli_flag |= LPFC_PROCESS_LA;
 823         control = readl(phba->HCregaddr);
 824         control |= HC_LAINT_ENA;
 825         writel(control, phba->HCregaddr);
 826         readl(phba->HCregaddr); /* flush */
 827         spin_unlock_irq(&phba->hbalock);
 828
 829         return;
 830 }
 831
 832
 833 static void
 834 lpfc_mbx_cmpl_local_config_link(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
 835 {
 836         struct lpfc_vport *vport = pmb->vport;
 837
 838         if (pmb->mb.mbxStatus)
 839                 goto out;
 840
 841         mempool_free(pmb, phba->mbox_mem_pool);
 842
 843         if (phba->fc_topology == TOPOLOGY_LOOP &&
 844             vport->fc_flag & FC_PUBLIC_LOOP &&
 845             !(vport->fc_flag & FC_LBIT)) {
 846                         /* Need to wait for FAN - use discovery timer
 847                          * for timeout.  port_state is identically
 848                          * LPFC_LOCAL_CFG_LINK while waiting for FAN
 849                          */
 850                         lpfc_set_disctmo(vport);
 851                         return;
 852         }
 853
 854         /* Start discovery by sending a FLOGI. port_state is identically
 855          * LPFC_FLOGI while waiting for FLOGI cmpl
 856          */
 857         if (vport->port_state != LPFC_FLOGI) {
 858                 lpfc_initial_flogi(vport);
 859         }
 860         return;
 861
 862 out:
 863         lpfc_printf_vlog(vport, KERN_ERR, LOG_MBOX,
 864                          "0306 CONFIG_LINK mbxStatus error x%x "
 865                          "HBA state x%x\n",
 866                          pmb->mb.mbxStatus, vport->port_state);
 867         mempool_free(pmb, phba->mbox_mem_pool);
 868
 869         lpfc_linkdown(phba);
 870
 871         lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
 872                          "0200 CONFIG_LINK bad hba state x%x\n",
 873                          vport->port_state);
 874
 875         lpfc_issue_clear_la(phba, vport);
 876         return;
 877 }
 878
 879 static void
 880 lpfc_mbx_cmpl_read_sparam(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
 881 {
 882         MAILBOX_t *mb = &pmb->mb;
 883         struct lpfc_dmabuf *mp = (struct lpfc_dmabuf *) pmb->context1;
 884         struct lpfc_vport  *vport = pmb->vport;
 885
 886
 887         /* Check for error */
 888         if (mb->mbxStatus) {
 889                 /* READ_SPARAM mbox error <mbxStatus> state <hba_state> */
 890                 lpfc_printf_vlog(vport, KERN_ERR, LOG_MBOX,
 891                                  "0319 READ_SPARAM mbxStatus error x%x "
 892                                  "hba state x%x>\n",
 893                                  mb->mbxStatus, vport->port_state);
 894                 lpfc_linkdown(phba);
 895                 goto out;
 896         }
 897
 898         memcpy((uint8_t *) &vport->fc_sparam, (uint8_t *) mp->virt,
 899                sizeof (struct serv_parm));
 900         if (phba->cfg_soft_wwnn)
 901                 u64_to_wwn(phba->cfg_soft_wwnn,
 902                            vport->fc_sparam.nodeName.u.wwn);
 903         if (phba->cfg_soft_wwpn)
 904                 u64_to_wwn(phba->cfg_soft_wwpn,
 905                            vport->fc_sparam.portName.u.wwn);
 906         memcpy(&vport->fc_nodename, &vport->fc_sparam.nodeName,
 907                sizeof(vport->fc_nodename));
 908         memcpy(&vport->fc_portname, &vport->fc_sparam.portName,
 909                sizeof(vport->fc_portname));
 910         if (vport->port_type == LPFC_PHYSICAL_PORT) {
 911                 memcpy(&phba->wwnn, &vport->fc_nodename, sizeof(phba->wwnn));
 912                 memcpy(&phba->wwpn, &vport->fc_portname, sizeof(phba->wwnn));
 913         }
 914
 915         lpfc_mbuf_free(phba, mp->virt, mp->phys);
 916         kfree(mp);
 917         mempool_free(pmb, phba->mbox_mem_pool);
 918         return;
 919
 920 out:
 921         pmb->context1 = NULL;
 922         lpfc_mbuf_free(phba, mp->virt, mp->phys);
 923         kfree(mp);
 924         lpfc_issue_clear_la(phba, vport);
 925         mempool_free(pmb, phba->mbox_mem_pool);
 926         return;
 927 }
 928
 929 static void
 930 lpfc_mbx_process_link_up(struct lpfc_hba *phba, READ_LA_VAR *la)
 931 {
 932         struct lpfc_vport *vport = phba->pport;
 933         LPFC_MBOXQ_t *sparam_mbox, *cfglink_mbox;
 934         int i;
 935         struct lpfc_dmabuf *mp;
 936         int rc;
 937
 938         sparam_mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
 939         cfglink_mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
 940
 941         spin_lock_irq(&phba->hbalock);
 942         switch (la->UlnkSpeed) {
 943         case LA_1GHZ_LINK:
 944                 phba->fc_linkspeed = LA_1GHZ_LINK;
 945                 break;
 946         case LA_2GHZ_LINK:
 947                 phba->fc_linkspeed = LA_2GHZ_LINK;
 948                 break;
 949         case LA_4GHZ_LINK:
 950                 phba->fc_linkspeed = LA_4GHZ_LINK;
 951                 break;
 952         case LA_8GHZ_LINK:
 953                 phba->fc_linkspeed = LA_8GHZ_LINK;
 954                 break;
 955         default:
 956                 phba->fc_linkspeed = LA_UNKNW_LINK;
 957                 break;
 958         }
 959
 960         phba->fc_topology = la->topology;
 961         phba->link_flag &= ~LS_NPIV_FAB_SUPPORTED;
 962
 963         if (phba->fc_topology == TOPOLOGY_LOOP) {
 964                 phba->sli3_options &= ~LPFC_SLI3_NPIV_ENABLED;
 965
 966                                 /* Get Loop Map information */
 967                 if (la->il)
 968                         vport->fc_flag |= FC_LBIT;
 969
 970                 vport->fc_myDID = la->granted_AL_PA;
 971                 i = la->un.lilpBde64.tus.f.bdeSize;
 972
 973                 if (i == 0) {
 974                         phba->alpa_map[0] = 0;
 975                 } else {
 976                         if (vport->cfg_log_verbose & LOG_LINK_EVENT) {
 977                                 int numalpa, j, k;
 978                                 union {
 979                                         uint8_t pamap[16];
 980                                         struct {
 981                                                 uint32_t wd1;
 982                                                 uint32_t wd2;
 983                                                 uint32_t wd3;
 984                                                 uint32_t wd4;
 985                                         } pa;
 986                                 } un;
 987                                 numalpa = phba->alpa_map[0];
 988                                 j = 0;
 989                                 while (j < numalpa) {
 990                                         memset(un.pamap, 0, 16);
 991                                         for (k = 1; j < numalpa; k++) {
 992                                                 un.pamap[k - 1] =
 993                                                         phba->alpa_map[j + 1];
 994                                                 j++;
 995                                                 if (k == 16)
 996                                                         break;
 997                                         }
 998                                         /* Link Up Event ALPA map */
 999                                         lpfc_printf_log(phba,
1000                                                         KERN_WARNING,
1001                                                         LOG_LINK_EVENT,
1002                                                         "1304 Link Up Event "
1003                                                         "ALPA map Data: x%x "
1004                                                         "x%x x%x x%x\n",
1005                                                         un.pa.wd1, un.pa.wd2,
1006                                                         un.pa.wd3, un.pa.wd4);
1007                                 }
1008                         }
1009                 }
1010         } else {
1011                 if (!(phba->sli3_options & LPFC_SLI3_NPIV_ENABLED)) {
1012                         if (phba->max_vpi && phba->cfg_enable_npiv &&
1013                            (phba->sli_rev == 3))
1014                                 phba->sli3_options |= LPFC_SLI3_NPIV_ENABLED;
1015                 }
1016                 vport->fc_myDID = phba->fc_pref_DID;
1017                 vport->fc_flag |= FC_LBIT;
1018         }
1019         spin_unlock_irq(&phba->hbalock);
1020
1021         lpfc_linkup(phba);
1022         if (sparam_mbox) {
1023                 lpfc_read_sparam(phba, sparam_mbox, 0);
1024                 sparam_mbox->vport = vport;
1025                 sparam_mbox->mbox_cmpl = lpfc_mbx_cmpl_read_sparam;
1026                 rc = lpfc_sli_issue_mbox(phba, sparam_mbox, MBX_NOWAIT);
1027                 if (rc == MBX_NOT_FINISHED) {
1028                         mp = (struct lpfc_dmabuf *) sparam_mbox->context1;
1029                         lpfc_mbuf_free(phba, mp->virt, mp->phys);
1030                         kfree(mp);
1031                         mempool_free(sparam_mbox, phba->mbox_mem_pool);
1032                         if (cfglink_mbox)
1033                                 mempool_free(cfglink_mbox, phba->mbox_mem_pool);
1034                         goto out;
1035                 }
1036         }
1037
1038         if (cfglink_mbox) {
1039                 vport->port_state = LPFC_LOCAL_CFG_LINK;
1040                 lpfc_config_link(phba, cfglink_mbox);
1041                 cfglink_mbox->vport = vport;
1042                 cfglink_mbox->mbox_cmpl = lpfc_mbx_cmpl_local_config_link;
1043                 rc = lpfc_sli_issue_mbox(phba, cfglink_mbox, MBX_NOWAIT);
1044                 if (rc != MBX_NOT_FINISHED)
1045                         return;
1046                 mempool_free(cfglink_mbox, phba->mbox_mem_pool);
1047         }
1048 out:
1049         lpfc_vport_set_state(vport, FC_VPORT_FAILED);
1050         lpfc_printf_vlog(vport, KERN_ERR, LOG_MBOX,
1051                          "0263 Discovery Mailbox error: state: 0x%x : %p %p\n",
1052                          vport->port_state, sparam_mbox, cfglink_mbox);
1053         lpfc_issue_clear_la(phba, vport);
1054         return;
1055 }
1056
1057 static void
1058 lpfc_mbx_issue_link_down(struct lpfc_hba *phba)
1059 {
1060         uint32_t control;
1061         struct lpfc_sli *psli = &phba->sli;
1062
1063         lpfc_linkdown(phba);
1064
1065         /* turn on Link Attention interrupts - no CLEAR_LA needed */
1066         spin_lock_irq(&phba->hbalock);
1067         psli->sli_flag |= LPFC_PROCESS_LA;
1068         control = readl(phba->HCregaddr);
1069         control |= HC_LAINT_ENA;
1070         writel(control, phba->HCregaddr);
1071         readl(phba->HCregaddr); /* flush */
1072         spin_unlock_irq(&phba->hbalock);
1073 }
1074
1075 /*
1076  * This routine handles processing a READ_LA mailbox
1077  * command upon completion. It is setup in the LPFC_MBOXQ
1078  * as the completion routine when the command is
1079  * handed off to the SLI layer.
1080  */
1081 void
1082 lpfc_mbx_cmpl_read_la(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
1083 {
1084         struct lpfc_vport *vport = pmb->vport;
1085         struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
1086         READ_LA_VAR *la;
1087         MAILBOX_t *mb = &pmb->mb;
1088         struct lpfc_dmabuf *mp = (struct lpfc_dmabuf *) (pmb->context1);
1089
1090         /* Check for error */
1091         if (mb->mbxStatus) {
1092                 lpfc_printf_log(phba, KERN_INFO, LOG_LINK_EVENT,
1093                                 "1307 READ_LA mbox error x%x state x%x\n",
1094                                 mb->mbxStatus, vport->port_state);
1095                 lpfc_mbx_issue_link_down(phba);
1096                 phba->link_state = LPFC_HBA_ERROR;
1097                 goto lpfc_mbx_cmpl_read_la_free_mbuf;
1098         }
1099
1100         la = (READ_LA_VAR *) & pmb->mb.un.varReadLA;
1101
1102         memcpy(&phba->alpa_map[0], mp->virt, 128);
1103
1104         spin_lock_irq(shost->host_lock);
1105         if (la->pb)
1106                 vport->fc_flag |= FC_BYPASSED_MODE;
1107         else
1108                 vport->fc_flag &= ~FC_BYPASSED_MODE;
1109         spin_unlock_irq(shost->host_lock);
1110
1111         if (((phba->fc_eventTag + 1) < la->eventTag) ||
1112             (phba->fc_eventTag == la->eventTag)) {
1113                 phba->fc_stat.LinkMultiEvent++;
1114                 if (la->attType == AT_LINK_UP)
1115                         if (phba->fc_eventTag != 0)
1116                                 lpfc_linkdown(phba);
1117         }
1118
1119         phba->fc_eventTag = la->eventTag;
1120
1121         if (la->attType == AT_LINK_UP) {
1122                 phba->fc_stat.LinkUp++;
1123                 if (phba->link_flag & LS_LOOPBACK_MODE) {
1124                         lpfc_printf_log(phba, KERN_INFO, LOG_LINK_EVENT,
1125                                         "1306 Link Up Event in loop back mode "
1126                                         "x%x received Data: x%x x%x x%x x%x\n",
1127                                         la->eventTag, phba->fc_eventTag,
1128                                         la->granted_AL_PA, la->UlnkSpeed,
1129                                         phba->alpa_map[0]);
1130                 } else {
1131                         lpfc_printf_log(phba, KERN_ERR, LOG_LINK_EVENT,
1132                                         "1303 Link Up Event x%x received "
1133                                         "Data: x%x x%x x%x x%x\n",
1134                                         la->eventTag, phba->fc_eventTag,
1135                                         la->granted_AL_PA, la->UlnkSpeed,
1136                                         phba->alpa_map[0]);
1137                 }
1138                 lpfc_mbx_process_link_up(phba, la);
1139         } else {
1140                 phba->fc_stat.LinkDown++;
1141                 lpfc_printf_log(phba, KERN_ERR, LOG_LINK_EVENT,
1142                                 "1305 Link Down Event x%x received "
1143                                 "Data: x%x x%x x%x\n",
1144                                 la->eventTag, phba->fc_eventTag,
1145                                 phba->pport->port_state, vport->fc_flag);
1146                 lpfc_mbx_issue_link_down(phba);
1147         }
1148
1149 lpfc_mbx_cmpl_read_la_free_mbuf:
1150         lpfc_mbuf_free(phba, mp->virt, mp->phys);
1151         kfree(mp);
1152         mempool_free(pmb, phba->mbox_mem_pool);
1153         return;
1154 }
1155
1156 /*
1157  * This routine handles processing a REG_LOGIN mailbox
1158  * command upon completion. It is setup in the LPFC_MBOXQ
1159  * as the completion routine when the command is
1160  * handed off to the SLI layer.
1161  */
1162 void
1163 lpfc_mbx_cmpl_reg_login(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
1164 {
1165         struct lpfc_vport  *vport = pmb->vport;
1166         struct lpfc_dmabuf *mp = (struct lpfc_dmabuf *) (pmb->context1);
1167         struct lpfc_nodelist *ndlp = (struct lpfc_nodelist *) pmb->context2;
1168
1169         pmb->context1 = NULL;
1170
1171         /* Good status, call state machine */
1172         lpfc_disc_state_machine(vport, ndlp, pmb, NLP_EVT_CMPL_REG_LOGIN);
1173         lpfc_mbuf_free(phba, mp->virt, mp->phys);
1174         kfree(mp);
1175         mempool_free(pmb, phba->mbox_mem_pool);
1176         lpfc_nlp_put(ndlp);
1177
1178         return;
1179 }
1180
1181 static void
1182 lpfc_mbx_cmpl_unreg_vpi(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
1183 {
1184         MAILBOX_t *mb = &pmb->mb;
1185         struct lpfc_vport *vport = pmb->vport;
1186         struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
1187
1188         switch (mb->mbxStatus) {
1189         case 0x0011:
1190         case 0x0020:
1191         case 0x9700:
1192                 lpfc_printf_vlog(vport, KERN_INFO, LOG_NODE,
1193                                  "0911 cmpl_unreg_vpi, mb status = 0x%x\n",
1194                                  mb->mbxStatus);
1195                 break;
1196         }
1197         vport->unreg_vpi_cmpl = VPORT_OK;
1198         mempool_free(pmb, phba->mbox_mem_pool);
1199         /*
1200          * This shost reference might have been taken at the beginning of
1201          * lpfc_vport_delete()
1202          */
1203         if (vport->load_flag & FC_UNLOADING)
1204                 scsi_host_put(shost);
1205 }
1206
1207 void
1208 lpfc_mbx_unreg_vpi(struct lpfc_vport *vport)
1209 {
1210         struct lpfc_hba  *phba = vport->phba;
1211         LPFC_MBOXQ_t *mbox;
1212         int rc;
1213
1214         mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
1215         if (!mbox)
1216                 return;
1217
1218         lpfc_unreg_vpi(phba, vport->vpi, mbox);
1219         mbox->vport = vport;
1220         mbox->mbox_cmpl = lpfc_mbx_cmpl_unreg_vpi;
1221         rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
1222         if (rc == MBX_NOT_FINISHED) {
1223                 lpfc_printf_vlog(vport, KERN_ERR, LOG_MBOX | LOG_VPORT,
1224                                  "1800 Could not issue unreg_vpi\n");
1225                 mempool_free(mbox, phba->mbox_mem_pool);
1226                 vport->unreg_vpi_cmpl = VPORT_ERROR;
1227         }
1228 }
1229
1230 static void
1231 lpfc_mbx_cmpl_reg_vpi(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
1232 {
1233         struct lpfc_vport *vport = pmb->vport;
1234         struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
1235         MAILBOX_t *mb = &pmb->mb;
1236
1237         switch (mb->mbxStatus) {
1238         case 0x0011:
1239         case 0x9601:
1240         case 0x9602:
1241                 lpfc_printf_vlog(vport, KERN_INFO, LOG_NODE,
1242                                  "0912 cmpl_reg_vpi, mb status = 0x%x\n",
1243                                  mb->mbxStatus);
1244                 lpfc_vport_set_state(vport, FC_VPORT_FAILED);
1245                 spin_lock_irq(shost->host_lock);
1246                 vport->fc_flag &= ~(FC_FABRIC | FC_PUBLIC_LOOP);
1247                 spin_unlock_irq(shost->host_lock);
1248                 vport->fc_myDID = 0;
1249                 goto out;
1250         }
1251
1252         vport->num_disc_nodes = 0;
1253         /* go thru NPR list and issue ELS PLOGIs */
1254         if (vport->fc_npr_cnt)
1255                 lpfc_els_disc_plogi(vport);
1256
1257         if (!vport->num_disc_nodes) {
1258                 spin_lock_irq(shost->host_lock);
1259                 vport->fc_flag &= ~FC_NDISC_ACTIVE;
1260                 spin_unlock_irq(shost->host_lock);
1261                 lpfc_can_disctmo(vport);
1262         }
1263         vport->port_state = LPFC_VPORT_READY;
1264
1265 out:
1266         mempool_free(pmb, phba->mbox_mem_pool);
1267         return;
1268 }
1269
1270 /*
1271  * This routine handles processing a Fabric REG_LOGIN mailbox
1272  * command upon completion. It is setup in the LPFC_MBOXQ
1273  * as the completion routine when the command is
1274  * handed off to the SLI layer.
1275  */
1276 void
1277 lpfc_mbx_cmpl_fabric_reg_login(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
1278 {
1279         struct lpfc_vport *vport = pmb->vport;
1280         MAILBOX_t *mb = &pmb->mb;
1281         struct lpfc_dmabuf *mp = (struct lpfc_dmabuf *) (pmb->context1);
1282         struct lpfc_nodelist *ndlp;
1283         struct lpfc_vport **vports;
1284         int i;
1285
1286         ndlp = (struct lpfc_nodelist *) pmb->context2;
1287         pmb->context1 = NULL;
1288         pmb->context2 = NULL;
1289         if (mb->mbxStatus) {
1290                 lpfc_mbuf_free(phba, mp->virt, mp->phys);
1291                 kfree(mp);
1292                 mempool_free(pmb, phba->mbox_mem_pool);
1293                 lpfc_nlp_put(ndlp);
1294
1295                 if (phba->fc_topology == TOPOLOGY_LOOP) {
1296                         /* FLOGI failed, use loop map to make discovery list */
1297                         lpfc_disc_list_loopmap(vport);
1298
1299                         /* Start discovery */
1300                         lpfc_disc_start(vport);
1301                         return;
1302                 }
1303
1304                 lpfc_vport_set_state(vport, FC_VPORT_FAILED);
1305                 lpfc_printf_vlog(vport, KERN_ERR, LOG_MBOX,
1306                                  "0258 Register Fabric login error: 0x%x\n",
1307                                  mb->mbxStatus);
1308                 return;
1309         }
1310
1311         ndlp->nlp_rpi = mb->un.varWords[0];
1312         ndlp->nlp_type |= NLP_FABRIC;
1313         lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
1314
1315         lpfc_nlp_put(ndlp);     /* Drop the reference from the mbox */
1316
1317         if (vport->port_state == LPFC_FABRIC_CFG_LINK) {
1318                 vports = lpfc_create_vport_work_array(phba);
1319                 if (vports != NULL)
1320                         for(i = 0;
1321                             i < LPFC_MAX_VPORTS && vports[i] != NULL;
1322                             i++) {
1323                                 if (vports[i]->port_type == LPFC_PHYSICAL_PORT)
1324                                         continue;
1325                                 if (phba->link_flag & LS_NPIV_FAB_SUPPORTED)
1326                                         lpfc_initial_fdisc(vports[i]);
1327                                 else if (phba->sli3_options &
1328                                                 LPFC_SLI3_NPIV_ENABLED) {
1329                                         lpfc_vport_set_state(vports[i],
1330                                                 FC_VPORT_NO_FABRIC_SUPP);
1331                                         lpfc_printf_vlog(vport, KERN_ERR,
1332                                                          LOG_ELS,
1333                                                         "0259 No NPIV "
1334                                                         "Fabric support\n");
1335                                 }
1336                         }
1337                 lpfc_destroy_vport_work_array(vports);
1338                 lpfc_do_scr_ns_plogi(phba, vport);
1339         }
1340
1341         lpfc_mbuf_free(phba, mp->virt, mp->phys);
1342         kfree(mp);
1343         mempool_free(pmb, phba->mbox_mem_pool);
1344         return;
1345 }
1346
1347 /*
1348  * This routine handles processing a NameServer REG_LOGIN mailbox
1349  * command upon completion. It is setup in the LPFC_MBOXQ
1350  * as the completion routine when the command is
1351  * handed off to the SLI layer.
1352  */
1353 void
1354 lpfc_mbx_cmpl_ns_reg_login(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
1355 {
1356         MAILBOX_t *mb = &pmb->mb;
1357         struct lpfc_dmabuf *mp = (struct lpfc_dmabuf *) (pmb->context1);
1358         struct lpfc_nodelist *ndlp = (struct lpfc_nodelist *) pmb->context2;
1359         struct lpfc_vport *vport = pmb->vport;
1360
1361         if (mb->mbxStatus) {
1362 out:
1363                 lpfc_nlp_put(ndlp);
1364                 lpfc_mbuf_free(phba, mp->virt, mp->phys);
1365                 kfree(mp);
1366                 mempool_free(pmb, phba->mbox_mem_pool);
1367
1368                 /* If no other thread is using the ndlp, free it */
1369                 lpfc_nlp_not_used(ndlp);
1370
1371                 if (phba->fc_topology == TOPOLOGY_LOOP) {
1372                         /*
1373                          * RegLogin failed, use loop map to make discovery
1374                          * list
1375                          */
1376                         lpfc_disc_list_loopmap(vport);
1377
1378                         /* Start discovery */
1379                         lpfc_disc_start(vport);
1380                         return;
1381                 }
1382                 lpfc_vport_set_state(vport, FC_VPORT_FAILED);
1383                 lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
1384                                  "0260 Register NameServer error: 0x%x\n",
1385                                  mb->mbxStatus);
1386                 return;
1387         }
1388
1389         pmb->context1 = NULL;
1390
1391         ndlp->nlp_rpi = mb->un.varWords[0];
1392         ndlp->nlp_type |= NLP_FABRIC;
1393         lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
1394
1395         if (vport->port_state < LPFC_VPORT_READY) {
1396                 /* Link up discovery requires Fabric registration. */
1397                 lpfc_ns_cmd(vport, SLI_CTNS_RFF_ID, 0, 0); /* Do this first! */
1398                 lpfc_ns_cmd(vport, SLI_CTNS_RNN_ID, 0, 0);
1399                 lpfc_ns_cmd(vport, SLI_CTNS_RSNN_NN, 0, 0);
1400                 lpfc_ns_cmd(vport, SLI_CTNS_RSPN_ID, 0, 0);
1401                 lpfc_ns_cmd(vport, SLI_CTNS_RFT_ID, 0, 0);
1402
1403                 /* Issue SCR just before NameServer GID_FT Query */
1404                 lpfc_issue_els_scr(vport, SCR_DID, 0);
1405         }
1406
1407         vport->fc_ns_retry = 0;
1408         /* Good status, issue CT Request to NameServer */
1409         if (lpfc_ns_cmd(vport, SLI_CTNS_GID_FT, 0, 0)) {
1410                 /* Cannot issue NameServer Query, so finish up discovery */
1411                 goto out;
1412         }
1413
1414         lpfc_nlp_put(ndlp);
1415         lpfc_mbuf_free(phba, mp->virt, mp->phys);
1416         kfree(mp);
1417         mempool_free(pmb, phba->mbox_mem_pool);
1418
1419         return;
1420 }
1421
1422 static void
1423 lpfc_register_remote_port(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
1424 {
1425         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1426         struct fc_rport  *rport;
1427         struct lpfc_rport_data *rdata;
1428         struct fc_rport_identifiers rport_ids;
1429         struct lpfc_hba  *phba = vport->phba;
1430
1431         /* Remote port has reappeared. Re-register w/ FC transport */
1432         rport_ids.node_name = wwn_to_u64(ndlp->nlp_nodename.u.wwn);
1433         rport_ids.port_name = wwn_to_u64(ndlp->nlp_portname.u.wwn);
1434         rport_ids.port_id = ndlp->nlp_DID;
1435         rport_ids.roles = FC_RPORT_ROLE_UNKNOWN;
1436
1437         /*
1438          * We leave our node pointer in rport->dd_data when we unregister a
1439          * FCP target port.  But fc_remote_port_add zeros the space to which
1440          * rport->dd_data points.  So, if we're reusing a previously
1441          * registered port, drop the reference that we took the last time we
1442          * registered the port.
1443          */
1444         if (ndlp->rport && ndlp->rport->dd_data &&
1445             ((struct lpfc_rport_data *) ndlp->rport->dd_data)->pnode == ndlp) {
1446                 lpfc_nlp_put(ndlp);
1447         }
1448
1449         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_RPORT,
1450                 "rport add:       did:x%x flg:x%x type x%x",
1451                 ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_type);
1452
1453         ndlp->rport = rport = fc_remote_port_add(shost, 0, &rport_ids);
1454         if (!rport || !get_device(&rport->dev)) {
1455                 dev_printk(KERN_WARNING, &phba->pcidev->dev,
1456                            "Warning: fc_remote_port_add failed\n");
1457                 return;
1458         }
1459
1460         /* initialize static port data */
1461         rport->maxframe_size = ndlp->nlp_maxframe;
1462         rport->supported_classes = ndlp->nlp_class_sup;
1463         rdata = rport->dd_data;
1464         rdata->pnode = lpfc_nlp_get(ndlp);
1465
1466         if (ndlp->nlp_type & NLP_FCP_TARGET)
1467                 rport_ids.roles |= FC_RPORT_ROLE_FCP_TARGET;
1468         if (ndlp->nlp_type & NLP_FCP_INITIATOR)
1469                 rport_ids.roles |= FC_RPORT_ROLE_FCP_INITIATOR;
1470
1471
1472         if (rport_ids.roles !=  FC_RPORT_ROLE_UNKNOWN)
1473                 fc_remote_port_rolechg(rport, rport_ids.roles);
1474
1475         if ((rport->scsi_target_id != -1) &&
1476             (rport->scsi_target_id < LPFC_MAX_TARGET)) {
1477                 ndlp->nlp_sid = rport->scsi_target_id;
1478         }
1479         return;
1480 }
1481
1482 static void
1483 lpfc_unregister_remote_port(struct lpfc_nodelist *ndlp)
1484 {
1485         struct fc_rport *rport = ndlp->rport;
1486
1487         lpfc_debugfs_disc_trc(ndlp->vport, LPFC_DISC_TRC_RPORT,
1488                 "rport delete:    did:x%x flg:x%x type x%x",
1489                 ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_type);
1490
1491         fc_remote_port_delete(rport);
1492
1493         return;
1494 }
1495
1496 static void
1497 lpfc_nlp_counters(struct lpfc_vport *vport, int state, int count)
1498 {
1499         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1500
1501         spin_lock_irq(shost->host_lock);
1502         switch (state) {
1503         case NLP_STE_UNUSED_NODE:
1504                 vport->fc_unused_cnt += count;
1505                 break;
1506         case NLP_STE_PLOGI_ISSUE:
1507                 vport->fc_plogi_cnt += count;
1508                 break;
1509         case NLP_STE_ADISC_ISSUE:
1510                 vport->fc_adisc_cnt += count;
1511                 break;
1512         case NLP_STE_REG_LOGIN_ISSUE:
1513                 vport->fc_reglogin_cnt += count;
1514                 break;
1515         case NLP_STE_PRLI_ISSUE:
1516                 vport->fc_prli_cnt += count;
1517                 break;
1518         case NLP_STE_UNMAPPED_NODE:
1519                 vport->fc_unmap_cnt += count;
1520                 break;
1521         case NLP_STE_MAPPED_NODE:
1522                 vport->fc_map_cnt += count;
1523                 break;
1524         case NLP_STE_NPR_NODE:
1525                 vport->fc_npr_cnt += count;
1526                 break;
1527         }
1528         spin_unlock_irq(shost->host_lock);
1529 }
1530
1531 static void
1532 lpfc_nlp_state_cleanup(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1533                        int old_state, int new_state)
1534 {
1535         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1536
1537         if (new_state == NLP_STE_UNMAPPED_NODE) {
1538                 ndlp->nlp_type &= ~(NLP_FCP_TARGET | NLP_FCP_INITIATOR);
1539                 ndlp->nlp_flag &= ~NLP_NODEV_REMOVE;
1540                 ndlp->nlp_type |= NLP_FC_NODE;
1541         }
1542         if (new_state == NLP_STE_MAPPED_NODE)
1543                 ndlp->nlp_flag &= ~NLP_NODEV_REMOVE;
1544         if (new_state == NLP_STE_NPR_NODE)
1545                 ndlp->nlp_flag &= ~NLP_RCV_PLOGI;
1546
1547         /* Transport interface */
1548         if (ndlp->rport && (old_state == NLP_STE_MAPPED_NODE ||
1549                             old_state == NLP_STE_UNMAPPED_NODE)) {
1550                 vport->phba->nport_event_cnt++;
1551                 lpfc_unregister_remote_port(ndlp);
1552         }
1553
1554         if (new_state ==  NLP_STE_MAPPED_NODE ||
1555             new_state == NLP_STE_UNMAPPED_NODE) {
1556                 vport->phba->nport_event_cnt++;
1557                 /*
1558                  * Tell the fc transport about the port, if we haven't
1559                  * already. If we have, and it's a scsi entity, be
1560                  * sure to unblock any attached scsi devices
1561                  */
1562                 lpfc_register_remote_port(vport, ndlp);
1563         }
1564         /*
1565          * if we added to Mapped list, but the remote port
1566          * registration failed or assigned a target id outside
1567          * our presentable range - move the node to the
1568          * Unmapped List
1569          */
1570         if (new_state == NLP_STE_MAPPED_NODE &&
1571             (!ndlp->rport ||
1572              ndlp->rport->scsi_target_id == -1 ||
1573              ndlp->rport->scsi_target_id >= LPFC_MAX_TARGET)) {
1574                 spin_lock_irq(shost->host_lock);
1575                 ndlp->nlp_flag |= NLP_TGT_NO_SCSIID;
1576                 spin_unlock_irq(shost->host_lock);
1577                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
1578         }
1579 }
1580
1581 static char *
1582 lpfc_nlp_state_name(char *buffer, size_t size, int state)
1583 {
1584         static char *states[] = {
1585                 [NLP_STE_UNUSED_NODE] = "UNUSED",
1586                 [NLP_STE_PLOGI_ISSUE] = "PLOGI",
1587                 [NLP_STE_ADISC_ISSUE] = "ADISC",
1588                 [NLP_STE_REG_LOGIN_ISSUE] = "REGLOGIN",
1589                 [NLP_STE_PRLI_ISSUE] = "PRLI",
1590                 [NLP_STE_UNMAPPED_NODE] = "UNMAPPED",
1591                 [NLP_STE_MAPPED_NODE] = "MAPPED",
1592                 [NLP_STE_NPR_NODE] = "NPR",
1593         };
1594
1595         if (state < NLP_STE_MAX_STATE && states[state])
1596                 strlcpy(buffer, states[state], size);
1597         else
1598                 snprintf(buffer, size, "unknown (%d)", state);
1599         return buffer;
1600 }
1601
1602 void
1603 lpfc_nlp_set_state(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1604                    int state)
1605 {
1606         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1607         int  old_state = ndlp->nlp_state;
1608         char name1[16], name2[16];
1609
1610         lpfc_printf_vlog(vport, KERN_INFO, LOG_NODE,
1611                          "0904 NPort state transition x%06x, %s -> %s\n",
1612                          ndlp->nlp_DID,
1613                          lpfc_nlp_state_name(name1, sizeof(name1), old_state),
1614                          lpfc_nlp_state_name(name2, sizeof(name2), state));
1615
1616         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_NODE,
1617                 "node statechg    did:x%x old:%d ste:%d",
1618                 ndlp->nlp_DID, old_state, state);
1619
1620         if (old_state == NLP_STE_NPR_NODE &&
1621             (ndlp->nlp_flag & NLP_DELAY_TMO) != 0 &&
1622             state != NLP_STE_NPR_NODE)
1623                 lpfc_cancel_retry_delay_tmo(vport, ndlp);
1624         if (old_state == NLP_STE_UNMAPPED_NODE) {
1625                 ndlp->nlp_flag &= ~NLP_TGT_NO_SCSIID;
1626                 ndlp->nlp_type &= ~NLP_FC_NODE;
1627         }
1628
1629         if (list_empty(&ndlp->nlp_listp)) {
1630                 spin_lock_irq(shost->host_lock);
1631                 list_add_tail(&ndlp->nlp_listp, &vport->fc_nodes);
1632                 spin_unlock_irq(shost->host_lock);
1633         } else if (old_state)
1634                 lpfc_nlp_counters(vport, old_state, -1);
1635
1636         ndlp->nlp_state = state;
1637         lpfc_nlp_counters(vport, state, 1);
1638         lpfc_nlp_state_cleanup(vport, ndlp, old_state, state);
1639 }
1640
1641 void
1642 lpfc_dequeue_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
1643 {
1644         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1645
1646         if ((ndlp->nlp_flag & NLP_DELAY_TMO) != 0)
1647                 lpfc_cancel_retry_delay_tmo(vport, ndlp);
1648         if (ndlp->nlp_state && !list_empty(&ndlp->nlp_listp))
1649                 lpfc_nlp_counters(vport, ndlp->nlp_state, -1);
1650         spin_lock_irq(shost->host_lock);
1651         list_del_init(&ndlp->nlp_listp);
1652         spin_unlock_irq(shost->host_lock);
1653         lpfc_nlp_state_cleanup(vport, ndlp, ndlp->nlp_state,
1654                                NLP_STE_UNUSED_NODE);
1655 }
1656
1657 void
1658 lpfc_drop_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
1659 {
1660         /*
1661          * Use of lpfc_drop_node and UNUSED list. lpfc_drop_node should
1662          * be used if we wish to issue the "last" lpfc_nlp_put() to remove
1663          * the ndlp from the vport.  The ndlp resides on the UNUSED list
1664          * until ALL other outstanding threads have completed. Thus, if a
1665          * ndlp is on the UNUSED list already, we should never do another
1666          * lpfc_drop_node() on it.
1667          */
1668         lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNUSED_NODE);
1669         lpfc_nlp_put(ndlp);
1670         return;
1671 }
1672
1673 /*
1674  * Start / ReStart rescue timer for Discovery / RSCN handling
1675  */
1676 void
1677 lpfc_set_disctmo(struct lpfc_vport *vport)
1678 {
1679         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1680         struct lpfc_hba  *phba = vport->phba;
1681         uint32_t tmo;
1682
1683         if (vport->port_state == LPFC_LOCAL_CFG_LINK) {
1684                 /* For FAN, timeout should be greater then edtov */
1685                 tmo = (((phba->fc_edtov + 999) / 1000) + 1);
1686         } else {
1687                 /* Normal discovery timeout should be > then ELS/CT timeout
1688                  * FC spec states we need 3 * ratov for CT requests
1689                  */
1690                 tmo = ((phba->fc_ratov * 3) + 3);
1691         }
1692
1693
1694         if (!timer_pending(&vport->fc_disctmo)) {
1695                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
1696                         "set disc timer:  tmo:x%x state:x%x flg:x%x",
1697                         tmo, vport->port_state, vport->fc_flag);
1698         }
1699
1700         mod_timer(&vport->fc_disctmo, jiffies + HZ * tmo);
1701         spin_lock_irq(shost->host_lock);
1702         vport->fc_flag |= FC_DISC_TMO;
1703         spin_unlock_irq(shost->host_lock);
1704
1705         /* Start Discovery Timer state <hba_state> */
1706         lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
1707                          "0247 Start Discovery Timer state x%x "
1708                          "Data: x%x x%lx x%x x%x\n",
1709                          vport->port_state, tmo,
1710                          (unsigned long)&vport->fc_disctmo, vport->fc_plogi_cnt,
1711                          vport->fc_adisc_cnt);
1712
1713         return;
1714 }
1715
1716 /*
1717  * Cancel rescue timer for Discovery / RSCN handling
1718  */
1719 int
1720 lpfc_can_disctmo(struct lpfc_vport *vport)
1721 {
1722         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1723         unsigned long iflags;
1724
1725         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
1726                 "can disc timer:  state:x%x rtry:x%x flg:x%x",
1727                 vport->port_state, vport->fc_ns_retry, vport->fc_flag);
1728
1729         /* Turn off discovery timer if its running */
1730         if (vport->fc_flag & FC_DISC_TMO) {
1731                 spin_lock_irqsave(shost->host_lock, iflags);
1732                 vport->fc_flag &= ~FC_DISC_TMO;
1733                 spin_unlock_irqrestore(shost->host_lock, iflags);
1734                 del_timer_sync(&vport->fc_disctmo);
1735                 spin_lock_irqsave(&vport->work_port_lock, iflags);
1736                 vport->work_port_events &= ~WORKER_DISC_TMO;
1737                 spin_unlock_irqrestore(&vport->work_port_lock, iflags);
1738         }
1739
1740         /* Cancel Discovery Timer state <hba_state> */
1741         lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
1742                          "0248 Cancel Discovery Timer state x%x "
1743                          "Data: x%x x%x x%x\n",
1744                          vport->port_state, vport->fc_flag,
1745                          vport->fc_plogi_cnt, vport->fc_adisc_cnt);
1746         return 0;
1747 }
1748
1749 /*
1750  * Check specified ring for outstanding IOCB on the SLI queue
1751  * Return true if iocb matches the specified nport
1752  */
1753 int
1754 lpfc_check_sli_ndlp(struct lpfc_hba *phba,
1755                     struct lpfc_sli_ring *pring,
1756                     struct lpfc_iocbq *iocb,
1757                     struct lpfc_nodelist *ndlp)
1758 {
1759         struct lpfc_sli *psli = &phba->sli;
1760         IOCB_t *icmd = &iocb->iocb;
1761         struct lpfc_vport    *vport = ndlp->vport;
1762
1763         if (iocb->vport != vport)
1764                 return 0;
1765
1766         if (pring->ringno == LPFC_ELS_RING) {
1767                 switch (icmd->ulpCommand) {
1768                 case CMD_GEN_REQUEST64_CR:
1769                         if (icmd->ulpContext == (volatile ushort)ndlp->nlp_rpi)
1770                                 return 1;
1771                 case CMD_ELS_REQUEST64_CR:
1772                         if (icmd->un.elsreq64.remoteID == ndlp->nlp_DID)
1773                                 return 1;
1774                 case CMD_XMIT_ELS_RSP64_CX:
1775                         if (iocb->context1 == (uint8_t *) ndlp)
1776                                 return 1;
1777                 }
1778         } else if (pring->ringno == psli->extra_ring) {
1779
1780         } else if (pring->ringno == psli->fcp_ring) {
1781                 /* Skip match check if waiting to relogin to FCP target */
1782                 if ((ndlp->nlp_type & NLP_FCP_TARGET) &&
1783                     (ndlp->nlp_flag & NLP_DELAY_TMO)) {
1784                         return 0;
1785                 }
1786                 if (icmd->ulpContext == (volatile ushort)ndlp->nlp_rpi) {
1787                         return 1;
1788                 }
1789         } else if (pring->ringno == psli->next_ring) {
1790
1791         }
1792         return 0;
1793 }
1794
1795 /*
1796  * Free resources / clean up outstanding I/Os
1797  * associated with nlp_rpi in the LPFC_NODELIST entry.
1798  */
1799 static int
1800 lpfc_no_rpi(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
1801 {
1802         LIST_HEAD(completions);
1803         struct lpfc_sli *psli;
1804         struct lpfc_sli_ring *pring;
1805         struct lpfc_iocbq *iocb, *next_iocb;
1806         IOCB_t *icmd;
1807         uint32_t rpi, i;
1808
1809         lpfc_fabric_abort_nport(ndlp);
1810
1811         /*
1812          * Everything that matches on txcmplq will be returned
1813          * by firmware with a no rpi error.
1814          */
1815         psli = &phba->sli;
1816         rpi = ndlp->nlp_rpi;
1817         if (rpi) {
1818                 /* Now process each ring */
1819                 for (i = 0; i < psli->num_rings; i++) {
1820                         pring = &psli->ring[i];
1821
1822                         spin_lock_irq(&phba->hbalock);
1823                         list_for_each_entry_safe(iocb, next_iocb, &pring->txq,
1824                                                  list) {
1825                                 /*
1826                                  * Check to see if iocb matches the nport we are
1827                                  * looking for
1828                                  */
1829                                 if ((lpfc_check_sli_ndlp(phba, pring, iocb,
1830                                                          ndlp))) {
1831                                         /* It matches, so deque and call compl
1832                                            with an error */
1833                                         list_move_tail(&iocb->list,
1834                                                        &completions);
1835                                         pring->txq_cnt--;
1836                                 }
1837                         }
1838                         spin_unlock_irq(&phba->hbalock);
1839                 }
1840         }
1841
1842         while (!list_empty(&completions)) {
1843                 iocb = list_get_first(&completions, struct lpfc_iocbq, list);
1844                 list_del_init(&iocb->list);
1845
1846                 if (!iocb->iocb_cmpl)
1847                         lpfc_sli_release_iocbq(phba, iocb);
1848                 else {
1849                         icmd = &iocb->iocb;
1850                         icmd->ulpStatus = IOSTAT_LOCAL_REJECT;
1851                         icmd->un.ulpWord[4] = IOERR_SLI_ABORTED;
1852                         (iocb->iocb_cmpl)(phba, iocb, iocb);
1853                 }
1854         }
1855
1856         return 0;
1857 }
1858
1859 /*
1860  * Free rpi associated with LPFC_NODELIST entry.
1861  * This routine is called from lpfc_freenode(), when we are removing
1862  * a LPFC_NODELIST entry. It is also called if the driver initiates a
1863  * LOGO that completes successfully, and we are waiting to PLOGI back
1864  * to the remote NPort. In addition, it is called after we receive
1865  * and unsolicated ELS cmd, send back a rsp, the rsp completes and
1866  * we are waiting to PLOGI back to the remote NPort.
1867  */
1868 int
1869 lpfc_unreg_rpi(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
1870 {
1871         struct lpfc_hba *phba = vport->phba;
1872         LPFC_MBOXQ_t    *mbox;
1873         int rc;
1874
1875         if (ndlp->nlp_rpi) {
1876                 mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
1877                 if (mbox) {
1878                         lpfc_unreg_login(phba, vport->vpi, ndlp->nlp_rpi, mbox);
1879                         mbox->vport = vport;
1880                         mbox->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
1881                         rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
1882                         if (rc == MBX_NOT_FINISHED)
1883                                 mempool_free(mbox, phba->mbox_mem_pool);
1884                 }
1885                 lpfc_no_rpi(phba, ndlp);
1886                 ndlp->nlp_rpi = 0;
1887                 return 1;
1888         }
1889         return 0;
1890 }
1891
1892 void
1893 lpfc_unreg_all_rpis(struct lpfc_vport *vport)
1894 {
1895         struct lpfc_hba  *phba  = vport->phba;
1896         LPFC_MBOXQ_t     *mbox;
1897         int rc;
1898
1899         mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
1900         if (mbox) {
1901                 lpfc_unreg_login(phba, vport->vpi, 0xffff, mbox);
1902                 mbox->vport = vport;
1903                 mbox->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
1904                 rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
1905                 if (rc == MBX_NOT_FINISHED) {
1906                         mempool_free(mbox, phba->mbox_mem_pool);
1907                 }
1908         }
1909 }
1910
1911 void
1912 lpfc_unreg_default_rpis(struct lpfc_vport *vport)
1913 {
1914         struct lpfc_hba  *phba  = vport->phba;
1915         LPFC_MBOXQ_t     *mbox;
1916         int rc;
1917
1918         mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
1919         if (mbox) {
1920                 lpfc_unreg_did(phba, vport->vpi, 0xffffffff, mbox);
1921                 mbox->vport = vport;
1922                 mbox->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
1923                 rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
1924                 if (rc == MBX_NOT_FINISHED) {
1925                         lpfc_printf_vlog(vport, KERN_ERR, LOG_MBOX | LOG_VPORT,
1926                                          "1815 Could not issue "
1927                                          "unreg_did (default rpis)\n");
1928                         mempool_free(mbox, phba->mbox_mem_pool);
1929                 }
1930         }
1931 }
1932
1933 /*
1934  * Free resources associated with LPFC_NODELIST entry
1935  * so it can be freed.
1936  */
1937 static int
1938 lpfc_cleanup_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
1939 {
1940         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1941         struct lpfc_hba  *phba = vport->phba;
1942         LPFC_MBOXQ_t *mb, *nextmb;
1943         struct lpfc_dmabuf *mp;
1944
1945         /* Cleanup node for NPort <nlp_DID> */
1946         lpfc_printf_vlog(vport, KERN_INFO, LOG_NODE,
1947                          "0900 Cleanup node for NPort x%x "
1948                          "Data: x%x x%x x%x\n",
1949                          ndlp->nlp_DID, ndlp->nlp_flag,
1950                          ndlp->nlp_state, ndlp->nlp_rpi);
1951         lpfc_dequeue_node(vport, ndlp);
1952
1953         /* cleanup any ndlp on mbox q waiting for reglogin cmpl */
1954         if ((mb = phba->sli.mbox_active)) {
1955                 if ((mb->mb.mbxCommand == MBX_REG_LOGIN64) &&
1956                    (ndlp == (struct lpfc_nodelist *) mb->context2)) {
1957                         mb->context2 = NULL;
1958                         mb->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
1959                 }
1960         }
1961
1962         spin_lock_irq(&phba->hbalock);
1963         list_for_each_entry_safe(mb, nextmb, &phba->sli.mboxq, list) {
1964                 if ((mb->mb.mbxCommand == MBX_REG_LOGIN64) &&
1965                     (ndlp == (struct lpfc_nodelist *) mb->context2)) {
1966                         mp = (struct lpfc_dmabuf *) (mb->context1);
1967                         if (mp) {
1968                                 __lpfc_mbuf_free(phba, mp->virt, mp->phys);
1969                                 kfree(mp);
1970                         }
1971                         list_del(&mb->list);
1972                         mempool_free(mb, phba->mbox_mem_pool);
1973                         lpfc_nlp_put(ndlp);
1974                 }
1975         }
1976         spin_unlock_irq(&phba->hbalock);
1977
1978         lpfc_els_abort(phba,ndlp);
1979         spin_lock_irq(shost->host_lock);
1980         ndlp->nlp_flag &= ~NLP_DELAY_TMO;
1981         spin_unlock_irq(shost->host_lock);
1982
1983         ndlp->nlp_last_elscmd = 0;
1984         del_timer_sync(&ndlp->nlp_delayfunc);
1985
1986         if (!list_empty(&ndlp->els_retry_evt.evt_listp))
1987                 list_del_init(&ndlp->els_retry_evt.evt_listp);
1988         if (!list_empty(&ndlp->dev_loss_evt.evt_listp))
1989                 list_del_init(&ndlp->dev_loss_evt.evt_listp);
1990
1991         lpfc_unreg_rpi(vport, ndlp);
1992
1993         return 0;
1994 }
1995
1996 /*
1997  * Check to see if we can free the nlp back to the freelist.
1998  * If we are in the middle of using the nlp in the discovery state
1999  * machine, defer the free till we reach the end of the state machine.
2000  */
2001 static void
2002 lpfc_nlp_remove(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
2003 {
2004         struct lpfc_hba  *phba = vport->phba;
2005         struct lpfc_rport_data *rdata;
2006         LPFC_MBOXQ_t *mbox;
2007         int rc;
2008
2009         if (ndlp->nlp_flag & NLP_DELAY_TMO) {
2010                 lpfc_cancel_retry_delay_tmo(vport, ndlp);
2011         }
2012
2013         if (ndlp->nlp_flag & NLP_DEFER_RM && !ndlp->nlp_rpi) {
2014                 /* For this case we need to cleanup the default rpi
2015                  * allocated by the firmware.
2016                  */
2017                 if ((mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL))
2018                         != NULL) {
2019                         rc = lpfc_reg_login(phba, vport->vpi, ndlp->nlp_DID,
2020                             (uint8_t *) &vport->fc_sparam, mbox, 0);
2021                         if (rc) {
2022                                 mempool_free(mbox, phba->mbox_mem_pool);
2023                         }
2024                         else {
2025                                 mbox->mbox_flag |= LPFC_MBX_IMED_UNREG;
2026                                 mbox->mbox_cmpl = lpfc_mbx_cmpl_dflt_rpi;
2027                                 mbox->vport = vport;
2028                                 mbox->context2 = 0;
2029                                 rc =lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
2030                                 if (rc == MBX_NOT_FINISHED) {
2031                                         mempool_free(mbox, phba->mbox_mem_pool);
2032                                 }
2033                         }
2034                 }
2035         }
2036
2037         lpfc_cleanup_node(vport, ndlp);
2038
2039         /*
2040          * We can get here with a non-NULL ndlp->rport because when we
2041          * unregister a rport we don't break the rport/node linkage.  So if we
2042          * do, make sure we don't leaving any dangling pointers behind.
2043          */
2044         if (ndlp->rport) {
2045                 rdata = ndlp->rport->dd_data;
2046                 rdata->pnode = NULL;
2047                 ndlp->rport = NULL;
2048         }
2049 }
2050
2051 static int
2052 lpfc_matchdid(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
2053               uint32_t did)
2054 {
2055         D_ID mydid, ndlpdid, matchdid;
2056
2057         if (did == Bcast_DID)
2058                 return 0;
2059
2060         if (ndlp->nlp_DID == 0) {
2061                 return 0;
2062         }
2063
2064         /* First check for Direct match */
2065         if (ndlp->nlp_DID == did)
2066                 return 1;
2067
2068         /* Next check for area/domain identically equals 0 match */
2069         mydid.un.word = vport->fc_myDID;
2070         if ((mydid.un.b.domain == 0) && (mydid.un.b.area == 0)) {
2071                 return 0;
2072         }
2073
2074         matchdid.un.word = did;
2075         ndlpdid.un.word = ndlp->nlp_DID;
2076         if (matchdid.un.b.id == ndlpdid.un.b.id) {
2077                 if ((mydid.un.b.domain == matchdid.un.b.domain) &&
2078                     (mydid.un.b.area == matchdid.un.b.area)) {
2079                         if ((ndlpdid.un.b.domain == 0) &&
2080                             (ndlpdid.un.b.area == 0)) {
2081                                 if (ndlpdid.un.b.id)
2082                                         return 1;
2083                         }
2084                         return 0;
2085                 }
2086
2087                 matchdid.un.word = ndlp->nlp_DID;
2088                 if ((mydid.un.b.domain == ndlpdid.un.b.domain) &&
2089                     (mydid.un.b.area == ndlpdid.un.b.area)) {
2090                         if ((matchdid.un.b.domain == 0) &&
2091                             (matchdid.un.b.area == 0)) {
2092                                 if (matchdid.un.b.id)
2093                                         return 1;
2094                         }
2095                 }
2096         }
2097         return 0;
2098 }
2099
2100 /* Search for a nodelist entry */
2101 static struct lpfc_nodelist *
2102 __lpfc_findnode_did(struct lpfc_vport *vport, uint32_t did)
2103 {
2104         struct lpfc_nodelist *ndlp;
2105         uint32_t data1;
2106
2107         list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
2108                 if (lpfc_matchdid(vport, ndlp, did)) {
2109                         data1 = (((uint32_t) ndlp->nlp_state << 24) |
2110                                  ((uint32_t) ndlp->nlp_xri << 16) |
2111                                  ((uint32_t) ndlp->nlp_type << 8) |
2112                                  ((uint32_t) ndlp->nlp_rpi & 0xff));
2113                         lpfc_printf_vlog(vport, KERN_INFO, LOG_NODE,
2114                                          "0929 FIND node DID "
2115                                          "Data: x%p x%x x%x x%x\n",
2116                                          ndlp, ndlp->nlp_DID,
2117                                          ndlp->nlp_flag, data1);
2118                         return ndlp;
2119                 }
2120         }
2121
2122         /* FIND node did <did> NOT FOUND */
2123         lpfc_printf_vlog(vport, KERN_INFO, LOG_NODE,
2124                          "0932 FIND node did x%x NOT FOUND.\n", did);
2125         return NULL;
2126 }
2127
2128 struct lpfc_nodelist *
2129 lpfc_findnode_did(struct lpfc_vport *vport, uint32_t did)
2130 {
2131         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
2132         struct lpfc_nodelist *ndlp;
2133
2134         spin_lock_irq(shost->host_lock);
2135         ndlp = __lpfc_findnode_did(vport, did);
2136         spin_unlock_irq(shost->host_lock);
2137         return ndlp;
2138 }
2139
2140 struct lpfc_nodelist *
2141 lpfc_setup_disc_node(struct lpfc_vport *vport, uint32_t did)
2142 {
2143         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
2144         struct lpfc_nodelist *ndlp;
2145
2146         ndlp = lpfc_findnode_did(vport, did);
2147         if (!ndlp) {
2148                 if ((vport->fc_flag & FC_RSCN_MODE) != 0 &&
2149                     lpfc_rscn_payload_check(vport, did) == 0)
2150                         return NULL;
2151                 ndlp = (struct lpfc_nodelist *)
2152                      mempool_alloc(vport->phba->nlp_mem_pool, GFP_KERNEL);
2153                 if (!ndlp)
2154                         return NULL;
2155                 lpfc_nlp_init(vport, ndlp, did);
2156                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
2157                 spin_lock_irq(shost->host_lock);
2158                 ndlp->nlp_flag |= NLP_NPR_2B_DISC;
2159                 spin_unlock_irq(shost->host_lock);
2160                 return ndlp;
2161         }
2162         if (vport->fc_flag & FC_RSCN_MODE) {
2163                 if (lpfc_rscn_payload_check(vport, did)) {
2164                         /* If we've already recieved a PLOGI from this NPort
2165                          * we don't need to try to discover it again.
2166                          */
2167                         if (ndlp->nlp_flag & NLP_RCV_PLOGI)
2168                                 return NULL;
2169
2170                         spin_lock_irq(shost->host_lock);
2171                         ndlp->nlp_flag |= NLP_NPR_2B_DISC;
2172                         spin_unlock_irq(shost->host_lock);
2173
2174                         /* Since this node is marked for discovery,
2175                          * delay timeout is not needed.
2176                          */
2177                         if (ndlp->nlp_flag & NLP_DELAY_TMO)
2178                                 lpfc_cancel_retry_delay_tmo(vport, ndlp);
2179                 } else
2180                         ndlp = NULL;
2181         } else {
2182                 /* If we've already recieved a PLOGI from this NPort,
2183                  * or we are already in the process of discovery on it,
2184                  * we don't need to try to discover it again.
2185                  */
2186                 if (ndlp->nlp_state == NLP_STE_ADISC_ISSUE ||
2187                     ndlp->nlp_state == NLP_STE_PLOGI_ISSUE ||
2188                     ndlp->nlp_flag & NLP_RCV_PLOGI)
2189                         return NULL;
2190                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
2191                 spin_lock_irq(shost->host_lock);
2192                 ndlp->nlp_flag |= NLP_NPR_2B_DISC;
2193                 spin_unlock_irq(shost->host_lock);
2194         }
2195         return ndlp;
2196 }
2197
2198 /* Build a list of nodes to discover based on the loopmap */
2199 void
2200 lpfc_disc_list_loopmap(struct lpfc_vport *vport)
2201 {
2202         struct lpfc_hba  *phba = vport->phba;
2203         int j;
2204         uint32_t alpa, index;
2205
2206         if (!lpfc_is_link_up(phba))
2207                 return;
2208
2209         if (phba->fc_topology != TOPOLOGY_LOOP)
2210                 return;
2211
2212         /* Check for loop map present or not */
2213         if (phba->alpa_map[0]) {
2214                 for (j = 1; j <= phba->alpa_map[0]; j++) {
2215                         alpa = phba->alpa_map[j];
2216                         if (((vport->fc_myDID & 0xff) == alpa) || (alpa == 0))
2217                                 continue;
2218                         lpfc_setup_disc_node(vport, alpa);
2219                 }
2220         } else {
2221                 /* No alpamap, so try all alpa's */
2222                 for (j = 0; j < FC_MAXLOOP; j++) {
2223                         /* If cfg_scan_down is set, start from highest
2224                          * ALPA (0xef) to lowest (0x1).
2225                          */
2226                         if (vport->cfg_scan_down)
2227                                 index = j;
2228                         else
2229                                 index = FC_MAXLOOP - j - 1;
2230                         alpa = lpfcAlpaArray[index];
2231                         if ((vport->fc_myDID & 0xff) == alpa)
2232                                 continue;
2233                         lpfc_setup_disc_node(vport, alpa);
2234                 }
2235         }
2236         return;
2237 }
2238
2239 void
2240 lpfc_issue_clear_la(struct lpfc_hba *phba, struct lpfc_vport *vport)
2241 {
2242         LPFC_MBOXQ_t *mbox;
2243         struct lpfc_sli *psli = &phba->sli;
2244         struct lpfc_sli_ring *extra_ring = &psli->ring[psli->extra_ring];
2245         struct lpfc_sli_ring *fcp_ring   = &psli->ring[psli->fcp_ring];
2246         struct lpfc_sli_ring *next_ring  = &psli->ring[psli->next_ring];
2247         int  rc;
2248
2249         /*
2250          * if it's not a physical port or if we already send
2251          * clear_la then don't send it.
2252          */
2253         if ((phba->link_state >= LPFC_CLEAR_LA) ||
2254             (vport->port_type != LPFC_PHYSICAL_PORT))
2255                 return;
2256
2257                         /* Link up discovery */
2258         if ((mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL)) != NULL) {
2259                 phba->link_state = LPFC_CLEAR_LA;
2260                 lpfc_clear_la(phba, mbox);
2261                 mbox->mbox_cmpl = lpfc_mbx_cmpl_clear_la;
2262                 mbox->vport = vport;
2263                 rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
2264                 if (rc == MBX_NOT_FINISHED) {
2265                         mempool_free(mbox, phba->mbox_mem_pool);
2266                         lpfc_disc_flush_list(vport);
2267                         extra_ring->flag &= ~LPFC_STOP_IOCB_EVENT;
2268                         fcp_ring->flag &= ~LPFC_STOP_IOCB_EVENT;
2269                         next_ring->flag &= ~LPFC_STOP_IOCB_EVENT;
2270                         phba->link_state = LPFC_HBA_ERROR;
2271                 }
2272         }
2273 }
2274
2275 /* Reg_vpi to tell firmware to resume normal operations */
2276 void
2277 lpfc_issue_reg_vpi(struct lpfc_hba *phba, struct lpfc_vport *vport)
2278 {
2279         LPFC_MBOXQ_t *regvpimbox;
2280
2281         regvpimbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
2282         if (regvpimbox) {
2283                 lpfc_reg_vpi(phba, vport->vpi, vport->fc_myDID, regvpimbox);
2284                 regvpimbox->mbox_cmpl = lpfc_mbx_cmpl_reg_vpi;
2285                 regvpimbox->vport = vport;
2286                 if (lpfc_sli_issue_mbox(phba, regvpimbox, MBX_NOWAIT)
2287                                         == MBX_NOT_FINISHED) {
2288                         mempool_free(regvpimbox, phba->mbox_mem_pool);
2289                 }
2290         }
2291 }
2292
2293 /* Start Link up / RSCN discovery on NPR nodes */
2294 void
2295 lpfc_disc_start(struct lpfc_vport *vport)
2296 {
2297         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
2298         struct lpfc_hba  *phba = vport->phba;
2299         uint32_t num_sent;
2300         uint32_t clear_la_pending;
2301         int did_changed;
2302
2303         if (!lpfc_is_link_up(phba))
2304                 return;
2305
2306         if (phba->link_state == LPFC_CLEAR_LA)
2307                 clear_la_pending = 1;
2308         else
2309                 clear_la_pending = 0;
2310
2311         if (vport->port_state < LPFC_VPORT_READY)
2312                 vport->port_state = LPFC_DISC_AUTH;
2313
2314         lpfc_set_disctmo(vport);
2315
2316         if (vport->fc_prevDID == vport->fc_myDID)
2317                 did_changed = 0;
2318         else
2319                 did_changed = 1;
2320
2321         vport->fc_prevDID = vport->fc_myDID;
2322         vport->num_disc_nodes = 0;
2323
2324         /* Start Discovery state <hba_state> */
2325         lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
2326                          "0202 Start Discovery hba state x%x "
2327                          "Data: x%x x%x x%x\n",
2328                          vport->port_state, vport->fc_flag, vport->fc_plogi_cnt,
2329                          vport->fc_adisc_cnt);
2330
2331         /* First do ADISCs - if any */
2332         num_sent = lpfc_els_disc_adisc(vport);
2333
2334         if (num_sent)
2335                 return;
2336
2337         /*
2338          * For SLI3, cmpl_reg_vpi will set port_state to READY, and
2339          * continue discovery.
2340          */
2341         if ((phba->sli3_options & LPFC_SLI3_NPIV_ENABLED) &&
2342             !(vport->fc_flag & FC_RSCN_MODE)) {
2343                 lpfc_issue_reg_vpi(phba, vport);
2344                 return;
2345         }
2346
2347         /*
2348          * For SLI2, we need to set port_state to READY and continue
2349          * discovery.
2350          */
2351         if (vport->port_state < LPFC_VPORT_READY && !clear_la_pending) {
2352                 /* If we get here, there is nothing to ADISC */
2353                 if (vport->port_type == LPFC_PHYSICAL_PORT)
2354                         lpfc_issue_clear_la(phba, vport);
2355
2356                 if (!(vport->fc_flag & FC_ABORT_DISCOVERY)) {
2357                         vport->num_disc_nodes = 0;
2358                         /* go thru NPR nodes and issue ELS PLOGIs */
2359                         if (vport->fc_npr_cnt)
2360                                 lpfc_els_disc_plogi(vport);
2361
2362                         if (!vport->num_disc_nodes) {
2363                                 spin_lock_irq(shost->host_lock);
2364                                 vport->fc_flag &= ~FC_NDISC_ACTIVE;
2365                                 spin_unlock_irq(shost->host_lock);
2366                                 lpfc_can_disctmo(vport);
2367                         }
2368                 }
2369                 vport->port_state = LPFC_VPORT_READY;
2370         } else {
2371                 /* Next do PLOGIs - if any */
2372                 num_sent = lpfc_els_disc_plogi(vport);
2373
2374                 if (num_sent)
2375                         return;
2376
2377                 if (vport->fc_flag & FC_RSCN_MODE) {
2378                         /* Check to see if more RSCNs came in while we
2379                          * were processing this one.
2380                          */
2381                         if ((vport->fc_rscn_id_cnt == 0) &&
2382                             (!(vport->fc_flag & FC_RSCN_DISCOVERY))) {
2383                                 spin_lock_irq(shost->host_lock);
2384                                 vport->fc_flag &= ~FC_RSCN_MODE;
2385                                 spin_unlock_irq(shost->host_lock);
2386                                 lpfc_can_disctmo(vport);
2387                         } else
2388                                 lpfc_els_handle_rscn(vport);
2389                 }
2390         }
2391         return;
2392 }
2393
2394 /*
2395  *  Ignore completion for all IOCBs on tx and txcmpl queue for ELS
2396  *  ring the match the sppecified nodelist.
2397  */
2398 static void
2399 lpfc_free_tx(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
2400 {
2401         LIST_HEAD(completions);
2402         struct lpfc_sli *psli;
2403         IOCB_t     *icmd;
2404         struct lpfc_iocbq    *iocb, *next_iocb;
2405         struct lpfc_sli_ring *pring;
2406
2407         psli = &phba->sli;
2408         pring = &psli->ring[LPFC_ELS_RING];
2409
2410         /* Error matching iocb on txq or txcmplq
2411          * First check the txq.
2412          */
2413         spin_lock_irq(&phba->hbalock);
2414         list_for_each_entry_safe(iocb, next_iocb, &pring->txq, list) {
2415                 if (iocb->context1 != ndlp) {
2416                         continue;
2417                 }
2418                 icmd = &iocb->iocb;
2419                 if ((icmd->ulpCommand == CMD_ELS_REQUEST64_CR) ||
2420                     (icmd->ulpCommand == CMD_XMIT_ELS_RSP64_CX)) {
2421
2422                         list_move_tail(&iocb->list, &completions);
2423                         pring->txq_cnt--;
2424                 }
2425         }
2426
2427         /* Next check the txcmplq */
2428         list_for_each_entry_safe(iocb, next_iocb, &pring->txcmplq, list) {
2429                 if (iocb->context1 != ndlp) {
2430                         continue;
2431                 }
2432                 icmd = &iocb->iocb;
2433                 if (icmd->ulpCommand == CMD_ELS_REQUEST64_CR ||
2434                     icmd->ulpCommand == CMD_XMIT_ELS_RSP64_CX) {
2435                         lpfc_sli_issue_abort_iotag(phba, pring, iocb);
2436                 }
2437         }
2438         spin_unlock_irq(&phba->hbalock);
2439
2440         while (!list_empty(&completions)) {
2441                 iocb = list_get_first(&completions, struct lpfc_iocbq, list);
2442                 list_del_init(&iocb->list);
2443
2444                 if (!iocb->iocb_cmpl)
2445                         lpfc_sli_release_iocbq(phba, iocb);
2446                 else {
2447                         icmd = &iocb->iocb;
2448                         icmd->ulpStatus = IOSTAT_LOCAL_REJECT;
2449                         icmd->un.ulpWord[4] = IOERR_SLI_ABORTED;
2450                         (iocb->iocb_cmpl) (phba, iocb, iocb);
2451                 }
2452         }
2453 }
2454
2455 void
2456 lpfc_disc_flush_list(struct lpfc_vport *vport)
2457 {
2458         struct lpfc_nodelist *ndlp, *next_ndlp;
2459         struct lpfc_hba *phba = vport->phba;
2460
2461         if (vport->fc_plogi_cnt || vport->fc_adisc_cnt) {
2462                 list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes,
2463                                          nlp_listp) {
2464                         if (ndlp->nlp_state == NLP_STE_PLOGI_ISSUE ||
2465                             ndlp->nlp_state == NLP_STE_ADISC_ISSUE) {
2466                                 lpfc_free_tx(phba, ndlp);
2467                         }
2468                 }
2469         }
2470 }
2471
2472 void
2473 lpfc_cleanup_discovery_resources(struct lpfc_vport *vport)
2474 {
2475         lpfc_els_flush_rscn(vport);
2476         lpfc_els_flush_cmd(vport);
2477         lpfc_disc_flush_list(vport);
2478 }
2479
2480 /*****************************************************************************/
2481 /*
2482  * NAME:     lpfc_disc_timeout
2483  *
2484  * FUNCTION: Fibre Channel driver discovery timeout routine.
2485  *
2486  * EXECUTION ENVIRONMENT: interrupt only
2487  *
2488  * CALLED FROM:
2489  *      Timer function
2490  *
2491  * RETURNS:
2492  *      none
2493  */
2494 /*****************************************************************************/
2495 void
2496 lpfc_disc_timeout(unsigned long ptr)
2497 {
2498         struct lpfc_vport *vport = (struct lpfc_vport *) ptr;
2499         struct lpfc_hba   *phba = vport->phba;
2500         unsigned long flags = 0;
2501
2502         if (unlikely(!phba))
2503                 return;
2504
2505         if ((vport->work_port_events & WORKER_DISC_TMO) == 0) {
2506                 spin_lock_irqsave(&vport->work_port_lock, flags);
2507                 vport->work_port_events |= WORKER_DISC_TMO;
2508                 spin_unlock_irqrestore(&vport->work_port_lock, flags);
2509
2510                 spin_lock_irqsave(&phba->hbalock, flags);
2511                 if (phba->work_wait)
2512                         lpfc_worker_wake_up(phba);
2513                 spin_unlock_irqrestore(&phba->hbalock, flags);
2514         }
2515         return;
2516 }
2517
2518 static void
2519 lpfc_disc_timeout_handler(struct lpfc_vport *vport)
2520 {
2521         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
2522         struct lpfc_hba  *phba = vport->phba;
2523         struct lpfc_sli  *psli = &phba->sli;
2524         struct lpfc_nodelist *ndlp, *next_ndlp;
2525         LPFC_MBOXQ_t *initlinkmbox;
2526         int rc, clrlaerr = 0;
2527
2528         if (!(vport->fc_flag & FC_DISC_TMO))
2529                 return;
2530
2531         spin_lock_irq(shost->host_lock);
2532         vport->fc_flag &= ~FC_DISC_TMO;
2533         spin_unlock_irq(shost->host_lock);
2534
2535         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
2536                 "disc timeout:    state:x%x rtry:x%x flg:x%x",
2537                 vport->port_state, vport->fc_ns_retry, vport->fc_flag);
2538
2539         switch (vport->port_state) {
2540
2541         case LPFC_LOCAL_CFG_LINK:
2542         /* port_state is identically  LPFC_LOCAL_CFG_LINK while waiting for
2543          * FAN
2544          */
2545                                 /* FAN timeout */
2546                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_DISCOVERY,
2547                                  "0221 FAN timeout\n");
2548                 /* Start discovery by sending FLOGI, clean up old rpis */
2549                 list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes,
2550                                          nlp_listp) {
2551                         if (ndlp->nlp_state != NLP_STE_NPR_NODE)
2552                                 continue;
2553                         if (ndlp->nlp_type & NLP_FABRIC) {
2554                                 /* Clean up the ndlp on Fabric connections */
2555                                 lpfc_drop_node(vport, ndlp);
2556
2557                         } else if (!(ndlp->nlp_flag & NLP_NPR_ADISC)) {
2558                                 /* Fail outstanding IO now since device
2559                                  * is marked for PLOGI.
2560                                  */
2561                                 lpfc_unreg_rpi(vport, ndlp);
2562                         }
2563                 }
2564                 if (vport->port_state != LPFC_FLOGI) {
2565                         lpfc_initial_flogi(vport);
2566                 }
2567                 break;
2568
2569         case LPFC_FDISC:
2570         case LPFC_FLOGI:
2571         /* port_state is identically LPFC_FLOGI while waiting for FLOGI cmpl */
2572                 /* Initial FLOGI timeout */
2573                 lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
2574                                  "0222 Initial %s timeout\n",
2575                                  vport->vpi ? "FDISC" : "FLOGI");
2576
2577                 /* Assume no Fabric and go on with discovery.
2578                  * Check for outstanding ELS FLOGI to abort.
2579                  */
2580
2581                 /* FLOGI failed, so just use loop map to make discovery list */
2582                 lpfc_disc_list_loopmap(vport);
2583
2584                 /* Start discovery */
2585                 lpfc_disc_start(vport);
2586                 break;
2587
2588         case LPFC_FABRIC_CFG_LINK:
2589         /* hba_state is identically LPFC_FABRIC_CFG_LINK while waiting for
2590            NameServer login */
2591                 lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
2592                                  "0223 Timeout while waiting for "
2593                                  "NameServer login\n");
2594                 /* Next look for NameServer ndlp */
2595                 ndlp = lpfc_findnode_did(vport, NameServer_DID);
2596                 if (ndlp)
2597                         lpfc_els_abort(phba, ndlp);
2598
2599                 /* ReStart discovery */
2600                 goto restart_disc;
2601
2602         case LPFC_NS_QRY:
2603         /* Check for wait for NameServer Rsp timeout */
2604                 lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
2605                                  "0224 NameServer Query timeout "
2606                                  "Data: x%x x%x\n",
2607                                  vport->fc_ns_retry, LPFC_MAX_NS_RETRY);
2608
2609                 if (vport->fc_ns_retry < LPFC_MAX_NS_RETRY) {
2610                         /* Try it one more time */
2611                         vport->fc_ns_retry++;
2612                         rc = lpfc_ns_cmd(vport, SLI_CTNS_GID_FT,
2613                                          vport->fc_ns_retry, 0);
2614                         if (rc == 0)
2615                                 break;
2616                 }
2617                 vport->fc_ns_retry = 0;
2618
2619 restart_disc:
2620                 /*
2621                  * Discovery is over.
2622                  * set port_state to PORT_READY if SLI2.
2623                  * cmpl_reg_vpi will set port_state to READY for SLI3.
2624                  */
2625                 if (phba->sli3_options & LPFC_SLI3_NPIV_ENABLED)
2626                         lpfc_issue_reg_vpi(phba, vport);
2627                 else  { /* NPIV Not enabled */
2628                         lpfc_issue_clear_la(phba, vport);
2629                         vport->port_state = LPFC_VPORT_READY;
2630                 }
2631
2632                 /* Setup and issue mailbox INITIALIZE LINK command */
2633                 initlinkmbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
2634                 if (!initlinkmbox) {
2635                         lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
2636                                          "0206 Device Discovery "
2637                                          "completion error\n");
2638                         phba->link_state = LPFC_HBA_ERROR;
2639                         break;
2640                 }
2641
2642                 lpfc_linkdown(phba);
2643                 lpfc_init_link(phba, initlinkmbox, phba->cfg_topology,
2644                                phba->cfg_link_speed);
2645                 initlinkmbox->mb.un.varInitLnk.lipsr_AL_PA = 0;
2646                 initlinkmbox->vport = vport;
2647                 initlinkmbox->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
2648                 rc = lpfc_sli_issue_mbox(phba, initlinkmbox, MBX_NOWAIT);
2649                 lpfc_set_loopback_flag(phba);
2650                 if (rc == MBX_NOT_FINISHED)
2651                         mempool_free(initlinkmbox, phba->mbox_mem_pool);
2652
2653                 break;
2654
2655         case LPFC_DISC_AUTH:
2656         /* Node Authentication timeout */
2657                 lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
2658                                  "0227 Node Authentication timeout\n");
2659                 lpfc_disc_flush_list(vport);
2660
2661                 /*
2662                  * set port_state to PORT_READY if SLI2.
2663                  * cmpl_reg_vpi will set port_state to READY for SLI3.
2664                  */
2665                 if (phba->sli3_options & LPFC_SLI3_NPIV_ENABLED)
2666                         lpfc_issue_reg_vpi(phba, vport);
2667                 else {  /* NPIV Not enabled */
2668                         lpfc_issue_clear_la(phba, vport);
2669                         vport->port_state = LPFC_VPORT_READY;
2670                 }
2671                 break;
2672
2673         case LPFC_VPORT_READY:
2674                 if (vport->fc_flag & FC_RSCN_MODE) {
2675                         lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
2676                                          "0231 RSCN timeout Data: x%x "
2677                                          "x%x\n",
2678                                          vport->fc_ns_retry, LPFC_MAX_NS_RETRY);
2679
2680                         /* Cleanup any outstanding ELS commands */
2681                         lpfc_els_flush_cmd(vport);
2682
2683                         lpfc_els_flush_rscn(vport);
2684                         lpfc_disc_flush_list(vport);
2685                 }
2686                 break;
2687
2688         default:
2689                 lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
2690                                  "0229 Unexpected discovery timeout, "
2691                                  "vport State x%x\n", vport->port_state);
2692                 break;
2693         }
2694
2695         switch (phba->link_state) {
2696         case LPFC_CLEAR_LA:
2697                                 /* CLEAR LA timeout */
2698                 lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
2699                                  "0228 CLEAR LA timeout\n");
2700                 clrlaerr = 1;
2701                 break;
2702
2703         case LPFC_LINK_UNKNOWN:
2704         case LPFC_WARM_START:
2705         case LPFC_INIT_START:
2706         case LPFC_INIT_MBX_CMDS:
2707         case LPFC_LINK_DOWN:
2708         case LPFC_LINK_UP:
2709         case LPFC_HBA_ERROR:
2710                 lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
2711                                  "0230 Unexpected timeout, hba link "
2712                                  "state x%x\n", phba->link_state);
2713                 clrlaerr = 1;
2714                 break;
2715
2716         case LPFC_HBA_READY:
2717                 break;
2718         }
2719
2720         if (clrlaerr) {
2721                 lpfc_disc_flush_list(vport);
2722                 psli->ring[(psli->extra_ring)].flag &= ~LPFC_STOP_IOCB_EVENT;
2723                 psli->ring[(psli->fcp_ring)].flag &= ~LPFC_STOP_IOCB_EVENT;
2724                 psli->ring[(psli->next_ring)].flag &= ~LPFC_STOP_IOCB_EVENT;
2725                 vport->port_state = LPFC_VPORT_READY;
2726         }
2727
2728         return;
2729 }
2730
2731 /*
2732  * This routine handles processing a NameServer REG_LOGIN mailbox
2733  * command upon completion. It is setup in the LPFC_MBOXQ
2734  * as the completion routine when the command is
2735  * handed off to the SLI layer.
2736  */
2737 void
2738 lpfc_mbx_cmpl_fdmi_reg_login(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
2739 {
2740         MAILBOX_t *mb = &pmb->mb;
2741         struct lpfc_dmabuf   *mp = (struct lpfc_dmabuf *) (pmb->context1);
2742         struct lpfc_nodelist *ndlp = (struct lpfc_nodelist *) pmb->context2;
2743         struct lpfc_vport    *vport = pmb->vport;
2744
2745         pmb->context1 = NULL;
2746
2747         ndlp->nlp_rpi = mb->un.varWords[0];
2748         ndlp->nlp_type |= NLP_FABRIC;
2749         lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
2750
2751         /*
2752          * Start issuing Fabric-Device Management Interface (FDMI) command to
2753          * 0xfffffa (FDMI well known port) or Delay issuing FDMI command if
2754          * fdmi-on=2 (supporting RPA/hostnmae)
2755          */
2756
2757         if (vport->cfg_fdmi_on == 1)
2758                 lpfc_fdmi_cmd(vport, ndlp, SLI_MGMT_DHBA);
2759         else
2760                 mod_timer(&vport->fc_fdmitmo, jiffies + HZ * 60);
2761
2762                                 /* Mailbox took a reference to the node */
2763         lpfc_nlp_put(ndlp);
2764         lpfc_mbuf_free(phba, mp->virt, mp->phys);
2765         kfree(mp);
2766         mempool_free(pmb, phba->mbox_mem_pool);
2767
2768         return;
2769 }
2770
2771 static int
2772 lpfc_filter_by_rpi(struct lpfc_nodelist *ndlp, void *param)
2773 {
2774         uint16_t *rpi = param;
2775
2776         return ndlp->nlp_rpi == *rpi;
2777 }
2778
2779 static int
2780 lpfc_filter_by_wwpn(struct lpfc_nodelist *ndlp, void *param)
2781 {
2782         return memcmp(&ndlp->nlp_portname, param,
2783                       sizeof(ndlp->nlp_portname)) == 0;
2784 }
2785
2786 struct lpfc_nodelist *
2787 __lpfc_find_node(struct lpfc_vport *vport, node_filter filter, void *param)
2788 {
2789         struct lpfc_nodelist *ndlp;
2790
2791         list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
2792                 if (filter(ndlp, param))
2793                         return ndlp;
2794         }
2795         return NULL;
2796 }
2797
2798 /*
2799  * Search node lists for a remote port matching filter criteria
2800  * Caller needs to hold host_lock before calling this routine.
2801  */
2802 struct lpfc_nodelist *
2803 lpfc_find_node(struct lpfc_vport *vport, node_filter filter, void *param)
2804 {
2805         struct Scsi_Host     *shost = lpfc_shost_from_vport(vport);
2806         struct lpfc_nodelist *ndlp;
2807
2808         spin_lock_irq(shost->host_lock);
2809         ndlp = __lpfc_find_node(vport, filter, param);
2810         spin_unlock_irq(shost->host_lock);
2811         return ndlp;
2812 }
2813
2814 /*
2815  * This routine looks up the ndlp lists for the given RPI. If rpi found it
2816  * returns the node list element pointer else return NULL.
2817  */
2818 struct lpfc_nodelist *
2819 __lpfc_findnode_rpi(struct lpfc_vport *vport, uint16_t rpi)
2820 {
2821         return __lpfc_find_node(vport, lpfc_filter_by_rpi, &rpi);
2822 }
2823
2824 struct lpfc_nodelist *
2825 lpfc_findnode_rpi(struct lpfc_vport *vport, uint16_t rpi)
2826 {
2827         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
2828         struct lpfc_nodelist *ndlp;
2829
2830         spin_lock_irq(shost->host_lock);
2831         ndlp = __lpfc_findnode_rpi(vport, rpi);
2832         spin_unlock_irq(shost->host_lock);
2833         return ndlp;
2834 }
2835
2836 /*
2837  * This routine looks up the ndlp lists for the given WWPN. If WWPN found it
2838  * returns the node element list pointer else return NULL.
2839  */
2840 struct lpfc_nodelist *
2841 lpfc_findnode_wwpn(struct lpfc_vport *vport, struct lpfc_name *wwpn)
2842 {
2843         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
2844         struct lpfc_nodelist *ndlp;
2845
2846         spin_lock_irq(shost->host_lock);
2847         ndlp = __lpfc_find_node(vport, lpfc_filter_by_wwpn, wwpn);
2848         spin_unlock_irq(shost->host_lock);
2849         return ndlp;
2850 }
2851
2852 void
2853 lpfc_nlp_init(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
2854               uint32_t did)
2855 {
2856         memset(ndlp, 0, sizeof (struct lpfc_nodelist));
2857         INIT_LIST_HEAD(&ndlp->els_retry_evt.evt_listp);
2858         INIT_LIST_HEAD(&ndlp->dev_loss_evt.evt_listp);
2859         init_timer(&ndlp->nlp_delayfunc);
2860         ndlp->nlp_delayfunc.function = lpfc_els_retry_delay;
2861         ndlp->nlp_delayfunc.data = (unsigned long)ndlp;
2862         ndlp->nlp_DID = did;
2863         ndlp->vport = vport;
2864         ndlp->nlp_sid = NLP_NO_SID;
2865         INIT_LIST_HEAD(&ndlp->nlp_listp);
2866         kref_init(&ndlp->kref);
2867
2868         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_NODE,
2869                 "node init:       did:x%x",
2870                 ndlp->nlp_DID, 0, 0);
2871
2872         return;
2873 }
2874
2875 /* This routine releases all resources associated with a specifc NPort's ndlp
2876  * and mempool_free's the nodelist.
2877  */
2878 static void
2879 lpfc_nlp_release(struct kref *kref)
2880 {
2881         struct lpfc_nodelist *ndlp = container_of(kref, struct lpfc_nodelist,
2882                                                   kref);
2883
2884         lpfc_debugfs_disc_trc(ndlp->vport, LPFC_DISC_TRC_NODE,
2885                 "node release:    did:x%x flg:x%x type:x%x",
2886                 ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_type);
2887
2888         lpfc_nlp_remove(ndlp->vport, ndlp);
2889         mempool_free(ndlp, ndlp->vport->phba->nlp_mem_pool);
2890 }
2891
2892 /* This routine bumps the reference count for a ndlp structure to ensure
2893  * that one discovery thread won't free a ndlp while another discovery thread
2894  * is using it.
2895  */
2896 struct lpfc_nodelist *
2897 lpfc_nlp_get(struct lpfc_nodelist *ndlp)
2898 {
2899         if (ndlp) {
2900                 lpfc_debugfs_disc_trc(ndlp->vport, LPFC_DISC_TRC_NODE,
2901                         "node get:        did:x%x flg:x%x refcnt:x%x",
2902                         ndlp->nlp_DID, ndlp->nlp_flag,
2903                         atomic_read(&ndlp->kref.refcount));
2904                 kref_get(&ndlp->kref);
2905         }
2906         return ndlp;
2907 }
2908
2909
2910 /* This routine decrements the reference count for a ndlp structure. If the
2911  * count goes to 0, this indicates the the associated nodelist should be freed.
2912  */
2913 int
2914 lpfc_nlp_put(struct lpfc_nodelist *ndlp)
2915 {
2916         if (ndlp) {
2917                 lpfc_debugfs_disc_trc(ndlp->vport, LPFC_DISC_TRC_NODE,
2918                 "node put:        did:x%x flg:x%x refcnt:x%x",
2919                         ndlp->nlp_DID, ndlp->nlp_flag,
2920                         atomic_read(&ndlp->kref.refcount));
2921         }
2922         return ndlp ? kref_put(&ndlp->kref, lpfc_nlp_release) : 0;
2923 }
2924
2925 /* This routine free's the specified nodelist if it is not in use
2926  * by any other discovery thread. This routine returns 1 if the ndlp
2927  * is not being used by anyone and has been freed. A return value of
2928  * 0 indicates it is being used by another discovery thread and the
2929  * refcount is left unchanged.
2930  */
2931 int
2932 lpfc_nlp_not_used(struct lpfc_nodelist *ndlp)
2933 {
2934         lpfc_debugfs_disc_trc(ndlp->vport, LPFC_DISC_TRC_NODE,
2935                 "node not used:   did:x%x flg:x%x refcnt:x%x",
2936                 ndlp->nlp_DID, ndlp->nlp_flag,
2937                 atomic_read(&ndlp->kref.refcount));
2938
2939         if (atomic_read(&ndlp->kref.refcount) == 1) {
2940                 lpfc_nlp_put(ndlp);
2941                 return 1;
2942         }
2943         return 0;
2944 }
2945