git.oblomov.eu Git - linux-2.6/blob - 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) 2004-2008 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_nl.h"
  34 #include "lpfc_disc.h"
  35 #include "lpfc_sli.h"
  36 #include "lpfc_scsi.h"
  37 #include "lpfc.h"
  38 #include "lpfc_logmsg.h"
  39 #include "lpfc_crtn.h"
  40 #include "lpfc_vport.h"
  41 #include "lpfc_debugfs.h"
  42
  43 /* AlpaArray for assignment of scsid for scan-down and bind_method */
  44 static uint8_t lpfcAlpaArray[] = {
  45         0xEF, 0xE8, 0xE4, 0xE2, 0xE1, 0xE0, 0xDC, 0xDA, 0xD9, 0xD6,
  46         0xD5, 0xD4, 0xD3, 0xD2, 0xD1, 0xCE, 0xCD, 0xCC, 0xCB, 0xCA,
  47         0xC9, 0xC7, 0xC6, 0xC5, 0xC3, 0xBC, 0xBA, 0xB9, 0xB6, 0xB5,
  48         0xB4, 0xB3, 0xB2, 0xB1, 0xAE, 0xAD, 0xAC, 0xAB, 0xAA, 0xA9,
  49         0xA7, 0xA6, 0xA5, 0xA3, 0x9F, 0x9E, 0x9D, 0x9B, 0x98, 0x97,
  50         0x90, 0x8F, 0x88, 0x84, 0x82, 0x81, 0x80, 0x7C, 0x7A, 0x79,
  51         0x76, 0x75, 0x74, 0x73, 0x72, 0x71, 0x6E, 0x6D, 0x6C, 0x6B,
  52         0x6A, 0x69, 0x67, 0x66, 0x65, 0x63, 0x5C, 0x5A, 0x59, 0x56,
  53         0x55, 0x54, 0x53, 0x52, 0x51, 0x4E, 0x4D, 0x4C, 0x4B, 0x4A,
  54         0x49, 0x47, 0x46, 0x45, 0x43, 0x3C, 0x3A, 0x39, 0x36, 0x35,
  55         0x34, 0x33, 0x32, 0x31, 0x2E, 0x2D, 0x2C, 0x2B, 0x2A, 0x29,
  56         0x27, 0x26, 0x25, 0x23, 0x1F, 0x1E, 0x1D, 0x1B, 0x18, 0x17,
  57         0x10, 0x0F, 0x08, 0x04, 0x02, 0x01
  58 };
  59
  60 static void lpfc_disc_timeout_handler(struct lpfc_vport *);
  61 static void lpfc_disc_flush_list(struct lpfc_vport *vport);
  62
  63 void
  64 lpfc_terminate_rport_io(struct fc_rport *rport)
  65 {
  66         struct lpfc_rport_data *rdata;
  67         struct lpfc_nodelist * ndlp;
  68         struct lpfc_hba *phba;
  69
  70         rdata = rport->dd_data;
  71         ndlp = rdata->pnode;
  72
  73         if (!ndlp || !NLP_CHK_NODE_ACT(ndlp)) {
  74                 if (rport->roles & FC_RPORT_ROLE_FCP_TARGET)
  75                         printk(KERN_ERR "Cannot find remote node"
  76                         " to terminate I/O Data x%x\n",
  77                         rport->port_id);
  78                 return;
  79         }
  80
  81         phba  = ndlp->vport->phba;
  82
  83         lpfc_debugfs_disc_trc(ndlp->vport, LPFC_DISC_TRC_RPORT,
  84                 "rport terminate: sid:x%x did:x%x flg:x%x",
  85                 ndlp->nlp_sid, ndlp->nlp_DID, ndlp->nlp_flag);
  86
  87         if (ndlp->nlp_sid != NLP_NO_SID) {
  88                 lpfc_sli_abort_iocb(ndlp->vport,
  89                         &phba->sli.ring[phba->sli.fcp_ring],
  90                         ndlp->nlp_sid, 0, LPFC_CTX_TGT);
  91         }
  92 }
  93
  94 /*
  95  * This function will be called when dev_loss_tmo fire.
  96  */
  97 void
  98 lpfc_dev_loss_tmo_callbk(struct fc_rport *rport)
  99 {
 100         struct lpfc_rport_data *rdata;
 101         struct lpfc_nodelist * ndlp;
 102         struct lpfc_vport *vport;
 103         struct lpfc_hba   *phba;
 104         struct lpfc_work_evt *evtp;
 105         int  put_node;
 106         int  put_rport;
 107
 108         rdata = rport->dd_data;
 109         ndlp = rdata->pnode;
 110         if (!ndlp || !NLP_CHK_NODE_ACT(ndlp))
 111                 return;
 112
 113         vport = ndlp->vport;
 114         phba  = vport->phba;
 115
 116         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_RPORT,
 117                 "rport devlosscb: sid:x%x did:x%x flg:x%x",
 118                 ndlp->nlp_sid, ndlp->nlp_DID, ndlp->nlp_flag);
 119
 120         /* Don't defer this if we are in the process of deleting the vport
 121          * or unloading the driver. The unload will cleanup the node
 122          * appropriately we just need to cleanup the ndlp rport info here.
 123          */
 124         if (vport->load_flag & FC_UNLOADING) {
 125                 put_node = rdata->pnode != NULL;
 126                 put_rport = ndlp->rport != NULL;
 127                 rdata->pnode = NULL;
 128                 ndlp->rport = NULL;
 129                 if (put_node)
 130                         lpfc_nlp_put(ndlp);
 131                 if (put_rport)
 132                         put_device(&rport->dev);
 133                 return;
 134         }
 135
 136         if (ndlp->nlp_state == NLP_STE_MAPPED_NODE)
 137                 return;
 138
 139         evtp = &ndlp->dev_loss_evt;
 140
 141         if (!list_empty(&evtp->evt_listp))
 142                 return;
 143
 144         spin_lock_irq(&phba->hbalock);
 145         /* We need to hold the node by incrementing the reference
 146          * count until this queued work is done
 147          */
 148         evtp->evt_arg1  = lpfc_nlp_get(ndlp);
 149         if (evtp->evt_arg1) {
 150                 evtp->evt = LPFC_EVT_DEV_LOSS;
 151                 list_add_tail(&evtp->evt_listp, &phba->work_list);
 152                 lpfc_worker_wake_up(phba);
 153         }
 154         spin_unlock_irq(&phba->hbalock);
 155
 156         return;
 157 }
 158
 159 /*
 160  * This function is called from the worker thread when dev_loss_tmo
 161  * expire.
 162  */
 163 static void
 164 lpfc_dev_loss_tmo_handler(struct lpfc_nodelist *ndlp)
 165 {
 166         struct lpfc_rport_data *rdata;
 167         struct fc_rport   *rport;
 168         struct lpfc_vport *vport;
 169         struct lpfc_hba   *phba;
 170         uint8_t *name;
 171         int  put_node;
 172         int  put_rport;
 173         int warn_on = 0;
 174
 175         rport = ndlp->rport;
 176
 177         if (!rport)
 178                 return;
 179
 180         rdata = rport->dd_data;
 181         name = (uint8_t *) &ndlp->nlp_portname;
 182         vport = ndlp->vport;
 183         phba  = vport->phba;
 184
 185         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_RPORT,
 186                 "rport devlosstmo:did:x%x type:x%x id:x%x",
 187                 ndlp->nlp_DID, ndlp->nlp_type, rport->scsi_target_id);
 188
 189         /* Don't defer this if we are in the process of deleting the vport
 190          * or unloading the driver. The unload will cleanup the node
 191          * appropriately we just need to cleanup the ndlp rport info here.
 192          */
 193         if (vport->load_flag & FC_UNLOADING) {
 194                 if (ndlp->nlp_sid != NLP_NO_SID) {
 195                         /* flush the target */
 196                         lpfc_sli_abort_iocb(vport,
 197                                         &phba->sli.ring[phba->sli.fcp_ring],
 198                                         ndlp->nlp_sid, 0, LPFC_CTX_TGT);
 199                 }
 200                 put_node = rdata->pnode != NULL;
 201                 put_rport = ndlp->rport != NULL;
 202                 rdata->pnode = NULL;
 203                 ndlp->rport = NULL;
 204                 if (put_node)
 205                         lpfc_nlp_put(ndlp);
 206                 if (put_rport)
 207                         put_device(&rport->dev);
 208                 return;
 209         }
 210
 211         if (ndlp->nlp_state == NLP_STE_MAPPED_NODE) {
 212                 lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
 213                                  "0284 Devloss timeout Ignored on "
 214                                  "WWPN %x:%x:%x:%x:%x:%x:%x:%x "
 215                                  "NPort x%x\n",
 216                                  *name, *(name+1), *(name+2), *(name+3),
 217                                  *(name+4), *(name+5), *(name+6), *(name+7),
 218                                  ndlp->nlp_DID);
 219                 return;
 220         }
 221
 222         if (ndlp->nlp_type & NLP_FABRIC) {
 223                 /* We will clean up these Nodes in linkup */
 224                 put_node = rdata->pnode != NULL;
 225                 put_rport = ndlp->rport != NULL;
 226                 rdata->pnode = NULL;
 227                 ndlp->rport = NULL;
 228                 if (put_node)
 229                         lpfc_nlp_put(ndlp);
 230                 if (put_rport)
 231                         put_device(&rport->dev);
 232                 return;
 233         }
 234
 235         if (ndlp->nlp_sid != NLP_NO_SID) {
 236                 warn_on = 1;
 237                 /* flush the target */
 238                 lpfc_sli_abort_iocb(vport, &phba->sli.ring[phba->sli.fcp_ring],
 239                                     ndlp->nlp_sid, 0, LPFC_CTX_TGT);
 240         }
 241
 242         if (warn_on) {
 243                 lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
 244                                  "0203 Devloss timeout on "
 245                                  "WWPN %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x "
 246                                  "NPort x%06x Data: x%x x%x x%x\n",
 247                                  *name, *(name+1), *(name+2), *(name+3),
 248                                  *(name+4), *(name+5), *(name+6), *(name+7),
 249                                  ndlp->nlp_DID, ndlp->nlp_flag,
 250                                  ndlp->nlp_state, ndlp->nlp_rpi);
 251         } else {
 252                 lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
 253                                  "0204 Devloss timeout on "
 254                                  "WWPN %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x "
 255                                  "NPort x%06x Data: x%x x%x x%x\n",
 256                                  *name, *(name+1), *(name+2), *(name+3),
 257                                  *(name+4), *(name+5), *(name+6), *(name+7),
 258                                  ndlp->nlp_DID, ndlp->nlp_flag,
 259                                  ndlp->nlp_state, ndlp->nlp_rpi);
 260         }
 261
 262         put_node = rdata->pnode != NULL;
 263         put_rport = ndlp->rport != NULL;
 264         rdata->pnode = NULL;
 265         ndlp->rport = NULL;
 266         if (put_node)
 267                 lpfc_nlp_put(ndlp);
 268         if (put_rport)
 269                 put_device(&rport->dev);
 270
 271         if (!(vport->load_flag & FC_UNLOADING) &&
 272             !(ndlp->nlp_flag & NLP_DELAY_TMO) &&
 273             !(ndlp->nlp_flag & NLP_NPR_2B_DISC) &&
 274             (ndlp->nlp_state != NLP_STE_UNMAPPED_NODE))
 275                 lpfc_disc_state_machine(vport, ndlp, NULL, NLP_EVT_DEVICE_RM);
 276 }
 277
 278 /**
 279  * lpfc_alloc_fast_evt: Allocates data structure for posting event.
 280  * @phba: Pointer to hba context object.
 281  *
 282  * This function is called from the functions which need to post
 283  * events from interrupt context. This function allocates data
 284  * structure required for posting event. It also keeps track of
 285  * number of events pending and prevent event storm when there are
 286  * too many events.
 287  **/
 288 struct lpfc_fast_path_event *
 289 lpfc_alloc_fast_evt(struct lpfc_hba *phba) {
 290         struct lpfc_fast_path_event *ret;
 291
 292         /* If there are lot of fast event do not exhaust memory due to this */
 293         if (atomic_read(&phba->fast_event_count) > LPFC_MAX_EVT_COUNT)
 294                 return NULL;
 295
 296         ret = kzalloc(sizeof(struct lpfc_fast_path_event),
 297                         GFP_ATOMIC);
 298         if (ret)
 299                 atomic_inc(&phba->fast_event_count);
 300         INIT_LIST_HEAD(&ret->work_evt.evt_listp);
 301         ret->work_evt.evt = LPFC_EVT_FASTPATH_MGMT_EVT;
 302         return ret;
 303 }
 304
 305 /**
 306  * lpfc_free_fast_evt: Frees event data structure.
 307  * @phba: Pointer to hba context object.
 308  * @evt:  Event object which need to be freed.
 309  *
 310  * This function frees the data structure required for posting
 311  * events.
 312  **/
 313 void
 314 lpfc_free_fast_evt(struct lpfc_hba *phba,
 315                 struct lpfc_fast_path_event *evt) {
 316
 317         atomic_dec(&phba->fast_event_count);
 318         kfree(evt);
 319 }
 320
 321 /**
 322  * lpfc_send_fastpath_evt: Posts events generated from fast path.
 323  * @phba: Pointer to hba context object.
 324  * @evtp: Event data structure.
 325  *
 326  * This function is called from worker thread, when the interrupt
 327  * context need to post an event. This function posts the event
 328  * to fc transport netlink interface.
 329  **/
 330 static void
 331 lpfc_send_fastpath_evt(struct lpfc_hba *phba,
 332                 struct lpfc_work_evt *evtp)
 333 {
 334         unsigned long evt_category, evt_sub_category;
 335         struct lpfc_fast_path_event *fast_evt_data;
 336         char *evt_data;
 337         uint32_t evt_data_size;
 338         struct Scsi_Host *shost;
 339
 340         fast_evt_data = container_of(evtp, struct lpfc_fast_path_event,
 341                 work_evt);
 342
 343         evt_category = (unsigned long) fast_evt_data->un.fabric_evt.event_type;
 344         evt_sub_category = (unsigned long) fast_evt_data->un.
 345                         fabric_evt.subcategory;
 346         shost = lpfc_shost_from_vport(fast_evt_data->vport);
 347         if (evt_category == FC_REG_FABRIC_EVENT) {
 348                 if (evt_sub_category == LPFC_EVENT_FCPRDCHKERR) {
 349                         evt_data = (char *) &fast_evt_data->un.read_check_error;
 350                         evt_data_size = sizeof(fast_evt_data->un.
 351                                 read_check_error);
 352                 } else if ((evt_sub_category == LPFC_EVENT_FABRIC_BUSY) ||
 353                         (evt_sub_category == IOSTAT_NPORT_BSY)) {
 354                         evt_data = (char *) &fast_evt_data->un.fabric_evt;
 355                         evt_data_size = sizeof(fast_evt_data->un.fabric_evt);
 356                 } else {
 357                         lpfc_free_fast_evt(phba, fast_evt_data);
 358                         return;
 359                 }
 360         } else if (evt_category == FC_REG_SCSI_EVENT) {
 361                 switch (evt_sub_category) {
 362                 case LPFC_EVENT_QFULL:
 363                 case LPFC_EVENT_DEVBSY:
 364                         evt_data = (char *) &fast_evt_data->un.scsi_evt;
 365                         evt_data_size = sizeof(fast_evt_data->un.scsi_evt);
 366                         break;
 367                 case LPFC_EVENT_CHECK_COND:
 368                         evt_data = (char *) &fast_evt_data->un.check_cond_evt;
 369                         evt_data_size =  sizeof(fast_evt_data->un.
 370                                 check_cond_evt);
 371                         break;
 372                 case LPFC_EVENT_VARQUEDEPTH:
 373                         evt_data = (char *) &fast_evt_data->un.queue_depth_evt;
 374                         evt_data_size = sizeof(fast_evt_data->un.
 375                                 queue_depth_evt);
 376                         break;
 377                 default:
 378                         lpfc_free_fast_evt(phba, fast_evt_data);
 379                         return;
 380                 }
 381         } else {
 382                 lpfc_free_fast_evt(phba, fast_evt_data);
 383                 return;
 384         }
 385
 386         fc_host_post_vendor_event(shost,
 387                 fc_get_event_number(),
 388                 evt_data_size,
 389                 evt_data,
 390                 SCSI_NL_VID_TYPE_PCI | PCI_VENDOR_ID_EMULEX);
 391
 392         lpfc_free_fast_evt(phba, fast_evt_data);
 393         return;
 394 }
 395
 396 static void
 397 lpfc_work_list_done(struct lpfc_hba *phba)
 398 {
 399         struct lpfc_work_evt  *evtp = NULL;
 400         struct lpfc_nodelist  *ndlp;
 401         int free_evt;
 402
 403         spin_lock_irq(&phba->hbalock);
 404         while (!list_empty(&phba->work_list)) {
 405                 list_remove_head((&phba->work_list), evtp, typeof(*evtp),
 406                                  evt_listp);
 407                 spin_unlock_irq(&phba->hbalock);
 408                 free_evt = 1;
 409                 switch (evtp->evt) {
 410                 case LPFC_EVT_ELS_RETRY:
 411                         ndlp = (struct lpfc_nodelist *) (evtp->evt_arg1);
 412                         lpfc_els_retry_delay_handler(ndlp);
 413                         free_evt = 0; /* evt is part of ndlp */
 414                         /* decrement the node reference count held
 415                          * for this queued work
 416                          */
 417                         lpfc_nlp_put(ndlp);
 418                         break;
 419                 case LPFC_EVT_DEV_LOSS:
 420                         ndlp = (struct lpfc_nodelist *)(evtp->evt_arg1);
 421                         lpfc_dev_loss_tmo_handler(ndlp);
 422                         free_evt = 0;
 423                         /* decrement the node reference count held for
 424                          * this queued work
 425                          */
 426                         lpfc_nlp_put(ndlp);
 427                         break;
 428                 case LPFC_EVT_ONLINE:
 429                         if (phba->link_state < LPFC_LINK_DOWN)
 430                                 *(int *) (evtp->evt_arg1) = lpfc_online(phba);
 431                         else
 432                                 *(int *) (evtp->evt_arg1) = 0;
 433                         complete((struct completion *)(evtp->evt_arg2));
 434                         break;
 435                 case LPFC_EVT_OFFLINE_PREP:
 436                         if (phba->link_state >= LPFC_LINK_DOWN)
 437                                 lpfc_offline_prep(phba);
 438                         *(int *)(evtp->evt_arg1) = 0;
 439                         complete((struct completion *)(evtp->evt_arg2));
 440                         break;
 441                 case LPFC_EVT_OFFLINE:
 442                         lpfc_offline(phba);
 443                         lpfc_sli_brdrestart(phba);
 444                         *(int *)(evtp->evt_arg1) =
 445                                 lpfc_sli_brdready(phba, HS_FFRDY | HS_MBRDY);
 446                         lpfc_unblock_mgmt_io(phba);
 447                         complete((struct completion *)(evtp->evt_arg2));
 448                         break;
 449                 case LPFC_EVT_WARM_START:
 450                         lpfc_offline(phba);
 451                         lpfc_reset_barrier(phba);
 452                         lpfc_sli_brdreset(phba);
 453                         lpfc_hba_down_post(phba);
 454                         *(int *)(evtp->evt_arg1) =
 455                                 lpfc_sli_brdready(phba, HS_MBRDY);
 456                         lpfc_unblock_mgmt_io(phba);
 457                         complete((struct completion *)(evtp->evt_arg2));
 458                         break;
 459                 case LPFC_EVT_KILL:
 460                         lpfc_offline(phba);
 461                         *(int *)(evtp->evt_arg1)
 462                                 = (phba->pport->stopped)
 463                                         ? 0 : lpfc_sli_brdkill(phba);
 464                         lpfc_unblock_mgmt_io(phba);
 465                         complete((struct completion *)(evtp->evt_arg2));
 466                         break;
 467                 case LPFC_EVT_FASTPATH_MGMT_EVT:
 468                         lpfc_send_fastpath_evt(phba, evtp);
 469                         free_evt = 0;
 470                         break;
 471                 }
 472                 if (free_evt)
 473                         kfree(evtp);
 474                 spin_lock_irq(&phba->hbalock);
 475         }
 476         spin_unlock_irq(&phba->hbalock);
 477
 478 }
 479
 480 static void
 481 lpfc_work_done(struct lpfc_hba *phba)
 482 {
 483         struct lpfc_sli_ring *pring;
 484         uint32_t ha_copy, status, control, work_port_events;
 485         struct lpfc_vport **vports;
 486         struct lpfc_vport *vport;
 487         int i;
 488
 489         spin_lock_irq(&phba->hbalock);
 490         ha_copy = phba->work_ha;
 491         phba->work_ha = 0;
 492         spin_unlock_irq(&phba->hbalock);
 493
 494         if (ha_copy & HA_ERATT)
 495                 /* Handle the error attention event */
 496                 lpfc_handle_eratt(phba);
 497
 498         if (ha_copy & HA_MBATT)
 499                 lpfc_sli_handle_mb_event(phba);
 500
 501         if (ha_copy & HA_LATT)
 502                 lpfc_handle_latt(phba);
 503
 504         vports = lpfc_create_vport_work_array(phba);
 505         if (vports != NULL)
 506                 for(i = 0; i <= phba->max_vpi; i++) {
 507                         /*
 508                          * We could have no vports in array if unloading, so if
 509                          * this happens then just use the pport
 510                          */
 511                         if (vports[i] == NULL && i == 0)
 512                                 vport = phba->pport;
 513                         else
 514                                 vport = vports[i];
 515                         if (vport == NULL)
 516                                 break;
 517                         spin_lock_irq(&vport->work_port_lock);
 518                         work_port_events = vport->work_port_events;
 519                         vport->work_port_events &= ~work_port_events;
 520                         spin_unlock_irq(&vport->work_port_lock);
 521                         if (work_port_events & WORKER_DISC_TMO)
 522                                 lpfc_disc_timeout_handler(vport);
 523                         if (work_port_events & WORKER_ELS_TMO)
 524                                 lpfc_els_timeout_handler(vport);
 525                         if (work_port_events & WORKER_HB_TMO)
 526                                 lpfc_hb_timeout_handler(phba);
 527                         if (work_port_events & WORKER_MBOX_TMO)
 528                                 lpfc_mbox_timeout_handler(phba);
 529                         if (work_port_events & WORKER_FABRIC_BLOCK_TMO)
 530                                 lpfc_unblock_fabric_iocbs(phba);
 531                         if (work_port_events & WORKER_FDMI_TMO)
 532                                 lpfc_fdmi_timeout_handler(vport);
 533                         if (work_port_events & WORKER_RAMP_DOWN_QUEUE)
 534                                 lpfc_ramp_down_queue_handler(phba);
 535                         if (work_port_events & WORKER_RAMP_UP_QUEUE)
 536                                 lpfc_ramp_up_queue_handler(phba);
 537                 }
 538         lpfc_destroy_vport_work_array(phba, vports);
 539
 540         pring = &phba->sli.ring[LPFC_ELS_RING];
 541         status = (ha_copy & (HA_RXMASK  << (4*LPFC_ELS_RING)));
 542         status >>= (4*LPFC_ELS_RING);
 543         if ((status & HA_RXMASK)
 544                 || (pring->flag & LPFC_DEFERRED_RING_EVENT)) {
 545                 if (pring->flag & LPFC_STOP_IOCB_EVENT) {
 546                         pring->flag |= LPFC_DEFERRED_RING_EVENT;
 547                         /* Set the lpfc data pending flag */
 548                         set_bit(LPFC_DATA_READY, &phba->data_flags);
 549                 } else {
 550                         pring->flag &= ~LPFC_DEFERRED_RING_EVENT;
 551                         lpfc_sli_handle_slow_ring_event(phba, pring,
 552                                                         (status &
 553                                                          HA_RXMASK));
 554                 }
 555                 /*
 556                  * Turn on Ring interrupts
 557                  */
 558                 spin_lock_irq(&phba->hbalock);
 559                 control = readl(phba->HCregaddr);
 560                 if (!(control & (HC_R0INT_ENA << LPFC_ELS_RING))) {
 561                         lpfc_debugfs_slow_ring_trc(phba,
 562                                 "WRK Enable ring: cntl:x%x hacopy:x%x",
 563                                 control, ha_copy, 0);
 564
 565                         control |= (HC_R0INT_ENA << LPFC_ELS_RING);
 566                         writel(control, phba->HCregaddr);
 567                         readl(phba->HCregaddr); /* flush */
 568                 }
 569                 else {
 570                         lpfc_debugfs_slow_ring_trc(phba,
 571                                 "WRK Ring ok:     cntl:x%x hacopy:x%x",
 572                                 control, ha_copy, 0);
 573                 }
 574                 spin_unlock_irq(&phba->hbalock);
 575         }
 576         lpfc_work_list_done(phba);
 577 }
 578
 579 int
 580 lpfc_do_work(void *p)
 581 {
 582         struct lpfc_hba *phba = p;
 583         int rc;
 584
 585         set_user_nice(current, -20);
 586         phba->data_flags = 0;
 587
 588         while (1) {
 589                 /* wait and check worker queue activities */
 590                 rc = wait_event_interruptible(phba->work_waitq,
 591                                         (test_and_clear_bit(LPFC_DATA_READY,
 592                                                             &phba->data_flags)
 593                                          || kthread_should_stop()));
 594                 BUG_ON(rc);
 595
 596                 if (kthread_should_stop())
 597                         break;
 598
 599                 /* Attend pending lpfc data processing */
 600                 lpfc_work_done(phba);
 601         }
 602         return 0;
 603 }
 604
 605 /*
 606  * This is only called to handle FC worker events. Since this a rare
 607  * occurance, we allocate a struct lpfc_work_evt structure here instead of
 608  * embedding it in the IOCB.
 609  */
 610 int
 611 lpfc_workq_post_event(struct lpfc_hba *phba, void *arg1, void *arg2,
 612                       uint32_t evt)
 613 {
 614         struct lpfc_work_evt  *evtp;
 615         unsigned long flags;
 616
 617         /*
 618          * All Mailbox completions and LPFC_ELS_RING rcv ring IOCB events will
 619          * be queued to worker thread for processing
 620          */
 621         evtp = kmalloc(sizeof(struct lpfc_work_evt), GFP_ATOMIC);
 622         if (!evtp)
 623                 return 0;
 624
 625         evtp->evt_arg1  = arg1;
 626         evtp->evt_arg2  = arg2;
 627         evtp->evt       = evt;
 628
 629         spin_lock_irqsave(&phba->hbalock, flags);
 630         list_add_tail(&evtp->evt_listp, &phba->work_list);
 631         spin_unlock_irqrestore(&phba->hbalock, flags);
 632
 633         lpfc_worker_wake_up(phba);
 634
 635         return 1;
 636 }
 637
 638 void
 639 lpfc_cleanup_rpis(struct lpfc_vport *vport, int remove)
 640 {
 641         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
 642         struct lpfc_hba  *phba = vport->phba;
 643         struct lpfc_nodelist *ndlp, *next_ndlp;
 644         int  rc;
 645
 646         list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) {
 647                 if (!NLP_CHK_NODE_ACT(ndlp))
 648                         continue;
 649                 if (ndlp->nlp_state == NLP_STE_UNUSED_NODE)
 650                         continue;
 651                 if ((phba->sli3_options & LPFC_SLI3_VPORT_TEARDOWN) ||
 652                         ((vport->port_type == LPFC_NPIV_PORT) &&
 653                         (ndlp->nlp_DID == NameServer_DID)))
 654                         lpfc_unreg_rpi(vport, ndlp);
 655
 656                 /* Leave Fabric nodes alone on link down */
 657                 if (!remove && ndlp->nlp_type & NLP_FABRIC)
 658                         continue;
 659                 rc = lpfc_disc_state_machine(vport, ndlp, NULL,
 660                                              remove
 661                                              ? NLP_EVT_DEVICE_RM
 662                                              : NLP_EVT_DEVICE_RECOVERY);
 663         }
 664         if (phba->sli3_options & LPFC_SLI3_VPORT_TEARDOWN) {
 665                 lpfc_mbx_unreg_vpi(vport);
 666                 spin_lock_irq(shost->host_lock);
 667                 vport->fc_flag |= FC_VPORT_NEEDS_REG_VPI;
 668                 spin_unlock_irq(shost->host_lock);
 669         }
 670 }
 671
 672 void
 673 lpfc_port_link_failure(struct lpfc_vport *vport)
 674 {
 675         /* Cleanup any outstanding RSCN activity */
 676         lpfc_els_flush_rscn(vport);
 677
 678         /* Cleanup any outstanding ELS commands */
 679         lpfc_els_flush_cmd(vport);
 680
 681         lpfc_cleanup_rpis(vport, 0);
 682
 683         /* Turn off discovery timer if its running */
 684         lpfc_can_disctmo(vport);
 685 }
 686
 687 static void
 688 lpfc_linkdown_port(struct lpfc_vport *vport)
 689 {
 690         struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
 691
 692         fc_host_post_event(shost, fc_get_event_number(), FCH_EVT_LINKDOWN, 0);
 693
 694         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
 695                 "Link Down:       state:x%x rtry:x%x flg:x%x",
 696                 vport->port_state, vport->fc_ns_retry, vport->fc_flag);
 697
 698         lpfc_port_link_failure(vport);
 699
 700 }
 701
 702 int
 703 lpfc_linkdown(struct lpfc_hba *phba)
 704 {
 705         struct lpfc_vport *vport = phba->pport;
 706         struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
 707         struct lpfc_vport **vports;
 708         LPFC_MBOXQ_t          *mb;
 709         int i;
 710
 711         if (phba->link_state == LPFC_LINK_DOWN)
 712                 return 0;
 713         spin_lock_irq(&phba->hbalock);
 714         if (phba->link_state > LPFC_LINK_DOWN) {
 715                 phba->link_state = LPFC_LINK_DOWN;
 716                 phba->pport->fc_flag &= ~FC_LBIT;
 717         }
 718         spin_unlock_irq(&phba->hbalock);
 719         vports = lpfc_create_vport_work_array(phba);
 720         if (vports != NULL)
 721                 for(i = 0; i <= phba->max_vpi && vports[i] != NULL; i++) {
 722                         /* Issue a LINK DOWN event to all nodes */
 723                         lpfc_linkdown_port(vports[i]);
 724                 }
 725         lpfc_destroy_vport_work_array(phba, vports);
 726         /* Clean up any firmware default rpi's */
 727         mb = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
 728         if (mb) {
 729                 lpfc_unreg_did(phba, 0xffff, 0xffffffff, mb);
 730                 mb->vport = vport;
 731                 mb->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
 732                 if (lpfc_sli_issue_mbox(phba, mb, MBX_NOWAIT)
 733                     == MBX_NOT_FINISHED) {
 734                         mempool_free(mb, phba->mbox_mem_pool);
 735                 }
 736         }
 737
 738         /* Setup myDID for link up if we are in pt2pt mode */
 739         if (phba->pport->fc_flag & FC_PT2PT) {
 740                 phba->pport->fc_myDID = 0;
 741                 mb = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
 742                 if (mb) {
 743                         lpfc_config_link(phba, mb);
 744                         mb->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
 745                         mb->vport = vport;
 746                         if (lpfc_sli_issue_mbox(phba, mb, MBX_NOWAIT)
 747                             == MBX_NOT_FINISHED) {
 748                                 mempool_free(mb, phba->mbox_mem_pool);
 749                         }
 750                 }
 751                 spin_lock_irq(shost->host_lock);
 752                 phba->pport->fc_flag &= ~(FC_PT2PT | FC_PT2PT_PLOGI);
 753                 spin_unlock_irq(shost->host_lock);
 754         }
 755
 756         return 0;
 757 }
 758
 759 static void
 760 lpfc_linkup_cleanup_nodes(struct lpfc_vport *vport)
 761 {
 762         struct lpfc_nodelist *ndlp;
 763
 764         list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
 765                 if (!NLP_CHK_NODE_ACT(ndlp))
 766                         continue;
 767                 if (ndlp->nlp_state == NLP_STE_UNUSED_NODE)
 768                         continue;
 769                 if (ndlp->nlp_type & NLP_FABRIC) {
 770                         /* On Linkup its safe to clean up the ndlp
 771                          * from Fabric connections.
 772                          */
 773                         if (ndlp->nlp_DID != Fabric_DID)
 774                                 lpfc_unreg_rpi(vport, ndlp);
 775                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
 776                 } else if (!(ndlp->nlp_flag & NLP_NPR_ADISC)) {
 777                         /* Fail outstanding IO now since device is
 778                          * marked for PLOGI.
 779                          */
 780                         lpfc_unreg_rpi(vport, ndlp);
 781                 }
 782         }
 783 }
 784
 785 static void
 786 lpfc_linkup_port(struct lpfc_vport *vport)
 787 {
 788         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
 789         struct lpfc_hba  *phba = vport->phba;
 790
 791         if ((vport->load_flag & FC_UNLOADING) != 0)
 792                 return;
 793
 794         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
 795                 "Link Up:         top:x%x speed:x%x flg:x%x",
 796                 phba->fc_topology, phba->fc_linkspeed, phba->link_flag);
 797
 798         /* If NPIV is not enabled, only bring the physical port up */
 799         if (!(phba->sli3_options & LPFC_SLI3_NPIV_ENABLED) &&
 800                 (vport != phba->pport))
 801                 return;
 802
 803         fc_host_post_event(shost, fc_get_event_number(), FCH_EVT_LINKUP, 0);
 804
 805         spin_lock_irq(shost->host_lock);
 806         vport->fc_flag &= ~(FC_PT2PT | FC_PT2PT_PLOGI | FC_ABORT_DISCOVERY |
 807                             FC_RSCN_MODE | FC_NLP_MORE | FC_RSCN_DISCOVERY);
 808         vport->fc_flag |= FC_NDISC_ACTIVE;
 809         vport->fc_ns_retry = 0;
 810         spin_unlock_irq(shost->host_lock);
 811
 812         if (vport->fc_flag & FC_LBIT)
 813                 lpfc_linkup_cleanup_nodes(vport);
 814
 815 }
 816
 817 static int
 818 lpfc_linkup(struct lpfc_hba *phba)
 819 {
 820         struct lpfc_vport **vports;
 821         int i;
 822
 823         phba->link_state = LPFC_LINK_UP;
 824
 825         /* Unblock fabric iocbs if they are blocked */
 826         clear_bit(FABRIC_COMANDS_BLOCKED, &phba->bit_flags);
 827         del_timer_sync(&phba->fabric_block_timer);
 828
 829         vports = lpfc_create_vport_work_array(phba);
 830         if (vports != NULL)
 831                 for(i = 0; i <= phba->max_vpi && vports[i] != NULL; i++)
 832                         lpfc_linkup_port(vports[i]);
 833         lpfc_destroy_vport_work_array(phba, vports);
 834         if (phba->sli3_options & LPFC_SLI3_NPIV_ENABLED)
 835                 lpfc_issue_clear_la(phba, phba->pport);
 836
 837         return 0;
 838 }
 839
 840 /*
 841  * This routine handles processing a CLEAR_LA mailbox
 842  * command upon completion. It is setup in the LPFC_MBOXQ
 843  * as the completion routine when the command is
 844  * handed off to the SLI layer.
 845  */
 846 static void
 847 lpfc_mbx_cmpl_clear_la(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
 848 {
 849         struct lpfc_vport *vport = pmb->vport;
 850         struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
 851         struct lpfc_sli   *psli = &phba->sli;
 852         MAILBOX_t *mb = &pmb->mb;
 853         uint32_t control;
 854
 855         /* Since we don't do discovery right now, turn these off here */
 856         psli->ring[psli->extra_ring].flag &= ~LPFC_STOP_IOCB_EVENT;
 857         psli->ring[psli->fcp_ring].flag &= ~LPFC_STOP_IOCB_EVENT;
 858         psli->ring[psli->next_ring].flag &= ~LPFC_STOP_IOCB_EVENT;
 859
 860         /* Check for error */
 861         if ((mb->mbxStatus) && (mb->mbxStatus != 0x1601)) {
 862                 /* CLEAR_LA mbox error <mbxStatus> state <hba_state> */
 863                 lpfc_printf_vlog(vport, KERN_ERR, LOG_MBOX,
 864                                  "0320 CLEAR_LA mbxStatus error x%x hba "
 865                                  "state x%x\n",
 866                                  mb->mbxStatus, vport->port_state);
 867                 phba->link_state = LPFC_HBA_ERROR;
 868                 goto out;
 869         }
 870
 871         if (vport->port_type == LPFC_PHYSICAL_PORT)
 872                 phba->link_state = LPFC_HBA_READY;
 873
 874         spin_lock_irq(&phba->hbalock);
 875         psli->sli_flag |= LPFC_PROCESS_LA;
 876         control = readl(phba->HCregaddr);
 877         control |= HC_LAINT_ENA;
 878         writel(control, phba->HCregaddr);
 879         readl(phba->HCregaddr); /* flush */
 880         spin_unlock_irq(&phba->hbalock);
 881         mempool_free(pmb, phba->mbox_mem_pool);
 882         return;
 883
 884 out:
 885         /* Device Discovery completes */
 886         lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
 887                          "0225 Device Discovery completes\n");
 888         mempool_free(pmb, phba->mbox_mem_pool);
 889
 890         spin_lock_irq(shost->host_lock);
 891         vport->fc_flag &= ~FC_ABORT_DISCOVERY;
 892         spin_unlock_irq(shost->host_lock);
 893
 894         lpfc_can_disctmo(vport);
 895
 896         /* turn on Link Attention interrupts */
 897
 898         spin_lock_irq(&phba->hbalock);
 899         psli->sli_flag |= LPFC_PROCESS_LA;
 900         control = readl(phba->HCregaddr);
 901         control |= HC_LAINT_ENA;
 902         writel(control, phba->HCregaddr);
 903         readl(phba->HCregaddr); /* flush */
 904         spin_unlock_irq(&phba->hbalock);
 905
 906         return;
 907 }
 908
 909
 910 static void
 911 lpfc_mbx_cmpl_local_config_link(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
 912 {
 913         struct lpfc_vport *vport = pmb->vport;
 914
 915         if (pmb->mb.mbxStatus)
 916                 goto out;
 917
 918         mempool_free(pmb, phba->mbox_mem_pool);
 919
 920         if (phba->fc_topology == TOPOLOGY_LOOP &&
 921             vport->fc_flag & FC_PUBLIC_LOOP &&
 922             !(vport->fc_flag & FC_LBIT)) {
 923                         /* Need to wait for FAN - use discovery timer
 924                          * for timeout.  port_state is identically
 925                          * LPFC_LOCAL_CFG_LINK while waiting for FAN
 926                          */
 927                         lpfc_set_disctmo(vport);
 928                         return;
 929         }
 930
 931         /* Start discovery by sending a FLOGI. port_state is identically
 932          * LPFC_FLOGI while waiting for FLOGI cmpl
 933          */
 934         if (vport->port_state != LPFC_FLOGI) {
 935                 lpfc_initial_flogi(vport);
 936         }
 937         return;
 938
 939 out:
 940         lpfc_printf_vlog(vport, KERN_ERR, LOG_MBOX,
 941                          "0306 CONFIG_LINK mbxStatus error x%x "
 942                          "HBA state x%x\n",
 943                          pmb->mb.mbxStatus, vport->port_state);
 944         mempool_free(pmb, phba->mbox_mem_pool);
 945
 946         lpfc_linkdown(phba);
 947
 948         lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
 949                          "0200 CONFIG_LINK bad hba state x%x\n",
 950                          vport->port_state);
 951
 952         lpfc_issue_clear_la(phba, vport);
 953         return;
 954 }
 955
 956 static void
 957 lpfc_mbx_cmpl_read_sparam(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
 958 {
 959         MAILBOX_t *mb = &pmb->mb;
 960         struct lpfc_dmabuf *mp = (struct lpfc_dmabuf *) pmb->context1;
 961         struct lpfc_vport  *vport = pmb->vport;
 962
 963
 964         /* Check for error */
 965         if (mb->mbxStatus) {
 966                 /* READ_SPARAM mbox error <mbxStatus> state <hba_state> */
 967                 lpfc_printf_vlog(vport, KERN_ERR, LOG_MBOX,
 968                                  "0319 READ_SPARAM mbxStatus error x%x "
 969                                  "hba state x%x>\n",
 970                                  mb->mbxStatus, vport->port_state);
 971                 lpfc_linkdown(phba);
 972                 goto out;
 973         }
 974
 975         memcpy((uint8_t *) &vport->fc_sparam, (uint8_t *) mp->virt,
 976                sizeof (struct serv_parm));
 977         if (phba->cfg_soft_wwnn)
 978                 u64_to_wwn(phba->cfg_soft_wwnn,
 979                            vport->fc_sparam.nodeName.u.wwn);
 980         if (phba->cfg_soft_wwpn)
 981                 u64_to_wwn(phba->cfg_soft_wwpn,
 982                            vport->fc_sparam.portName.u.wwn);
 983         memcpy(&vport->fc_nodename, &vport->fc_sparam.nodeName,
 984                sizeof(vport->fc_nodename));
 985         memcpy(&vport->fc_portname, &vport->fc_sparam.portName,
 986                sizeof(vport->fc_portname));
 987         if (vport->port_type == LPFC_PHYSICAL_PORT) {
 988                 memcpy(&phba->wwnn, &vport->fc_nodename, sizeof(phba->wwnn));
 989                 memcpy(&phba->wwpn, &vport->fc_portname, sizeof(phba->wwnn));
 990         }
 991
 992         lpfc_mbuf_free(phba, mp->virt, mp->phys);
 993         kfree(mp);
 994         mempool_free(pmb, phba->mbox_mem_pool);
 995         return;
 996
 997 out:
 998         pmb->context1 = NULL;
 999         lpfc_mbuf_free(phba, mp->virt, mp->phys);
1000         kfree(mp);
1001         lpfc_issue_clear_la(phba, vport);
1002         mempool_free(pmb, phba->mbox_mem_pool);
1003         return;
1004 }
1005
1006 static void
1007 lpfc_mbx_process_link_up(struct lpfc_hba *phba, READ_LA_VAR *la)
1008 {
1009         struct lpfc_vport *vport = phba->pport;
1010         LPFC_MBOXQ_t *sparam_mbox, *cfglink_mbox;
1011         int i;
1012         struct lpfc_dmabuf *mp;
1013         int rc;
1014
1015         sparam_mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
1016         cfglink_mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
1017
1018         spin_lock_irq(&phba->hbalock);
1019         switch (la->UlnkSpeed) {
1020         case LA_1GHZ_LINK:
1021                 phba->fc_linkspeed = LA_1GHZ_LINK;
1022                 break;
1023         case LA_2GHZ_LINK:
1024                 phba->fc_linkspeed = LA_2GHZ_LINK;
1025                 break;
1026         case LA_4GHZ_LINK:
1027                 phba->fc_linkspeed = LA_4GHZ_LINK;
1028                 break;
1029         case LA_8GHZ_LINK:
1030                 phba->fc_linkspeed = LA_8GHZ_LINK;
1031                 break;
1032         default:
1033                 phba->fc_linkspeed = LA_UNKNW_LINK;
1034                 break;
1035         }
1036
1037         phba->fc_topology = la->topology;
1038         phba->link_flag &= ~LS_NPIV_FAB_SUPPORTED;
1039
1040         if (phba->fc_topology == TOPOLOGY_LOOP) {
1041                 phba->sli3_options &= ~LPFC_SLI3_NPIV_ENABLED;
1042
1043                 if (phba->cfg_enable_npiv)
1044                         lpfc_printf_log(phba, KERN_ERR, LOG_LINK_EVENT,
1045                                 "1309 Link Up Event npiv not supported in loop "
1046                                 "topology\n");
1047                                 /* Get Loop Map information */
1048                 if (la->il)
1049                         vport->fc_flag |= FC_LBIT;
1050
1051                 vport->fc_myDID = la->granted_AL_PA;
1052                 i = la->un.lilpBde64.tus.f.bdeSize;
1053
1054                 if (i == 0) {
1055                         phba->alpa_map[0] = 0;
1056                 } else {
1057                         if (vport->cfg_log_verbose & LOG_LINK_EVENT) {
1058                                 int numalpa, j, k;
1059                                 union {
1060                                         uint8_t pamap[16];
1061                                         struct {
1062                                                 uint32_t wd1;
1063                                                 uint32_t wd2;
1064                                                 uint32_t wd3;
1065                                                 uint32_t wd4;
1066                                         } pa;
1067                                 } un;
1068                                 numalpa = phba->alpa_map[0];
1069                                 j = 0;
1070                                 while (j < numalpa) {
1071                                         memset(un.pamap, 0, 16);
1072                                         for (k = 1; j < numalpa; k++) {
1073                                                 un.pamap[k - 1] =
1074                                                         phba->alpa_map[j + 1];
1075                                                 j++;
1076                                                 if (k == 16)
1077                                                         break;
1078                                         }
1079                                         /* Link Up Event ALPA map */
1080                                         lpfc_printf_log(phba,
1081                                                         KERN_WARNING,
1082                                                         LOG_LINK_EVENT,
1083                                                         "1304 Link Up Event "
1084                                                         "ALPA map Data: x%x "
1085                                                         "x%x x%x x%x\n",
1086                                                         un.pa.wd1, un.pa.wd2,
1087                                                         un.pa.wd3, un.pa.wd4);
1088                                 }
1089                         }
1090                 }
1091         } else {
1092                 if (!(phba->sli3_options & LPFC_SLI3_NPIV_ENABLED)) {
1093                         if (phba->max_vpi && phba->cfg_enable_npiv &&
1094                            (phba->sli_rev == 3))
1095                                 phba->sli3_options |= LPFC_SLI3_NPIV_ENABLED;
1096                 }
1097                 vport->fc_myDID = phba->fc_pref_DID;
1098                 vport->fc_flag |= FC_LBIT;
1099         }
1100         spin_unlock_irq(&phba->hbalock);
1101
1102         lpfc_linkup(phba);
1103         if (sparam_mbox) {
1104                 lpfc_read_sparam(phba, sparam_mbox, 0);
1105                 sparam_mbox->vport = vport;
1106                 sparam_mbox->mbox_cmpl = lpfc_mbx_cmpl_read_sparam;
1107                 rc = lpfc_sli_issue_mbox(phba, sparam_mbox, MBX_NOWAIT);
1108                 if (rc == MBX_NOT_FINISHED) {
1109                         mp = (struct lpfc_dmabuf *) sparam_mbox->context1;
1110                         lpfc_mbuf_free(phba, mp->virt, mp->phys);
1111                         kfree(mp);
1112                         mempool_free(sparam_mbox, phba->mbox_mem_pool);
1113                         if (cfglink_mbox)
1114                                 mempool_free(cfglink_mbox, phba->mbox_mem_pool);
1115                         goto out;
1116                 }
1117         }
1118
1119         if (cfglink_mbox) {
1120                 vport->port_state = LPFC_LOCAL_CFG_LINK;
1121                 lpfc_config_link(phba, cfglink_mbox);
1122                 cfglink_mbox->vport = vport;
1123                 cfglink_mbox->mbox_cmpl = lpfc_mbx_cmpl_local_config_link;
1124                 rc = lpfc_sli_issue_mbox(phba, cfglink_mbox, MBX_NOWAIT);
1125                 if (rc != MBX_NOT_FINISHED)
1126                         return;
1127                 mempool_free(cfglink_mbox, phba->mbox_mem_pool);
1128         }
1129 out:
1130         lpfc_vport_set_state(vport, FC_VPORT_FAILED);
1131         lpfc_printf_vlog(vport, KERN_ERR, LOG_MBOX,
1132                          "0263 Discovery Mailbox error: state: 0x%x : %p %p\n",
1133                          vport->port_state, sparam_mbox, cfglink_mbox);
1134         lpfc_issue_clear_la(phba, vport);
1135         return;
1136 }
1137
1138 static void
1139 lpfc_enable_la(struct lpfc_hba *phba)
1140 {
1141         uint32_t control;
1142         struct lpfc_sli *psli = &phba->sli;
1143         spin_lock_irq(&phba->hbalock);
1144         psli->sli_flag |= LPFC_PROCESS_LA;
1145         control = readl(phba->HCregaddr);
1146         control |= HC_LAINT_ENA;
1147         writel(control, phba->HCregaddr);
1148         readl(phba->HCregaddr); /* flush */
1149         spin_unlock_irq(&phba->hbalock);
1150 }
1151
1152 static void
1153 lpfc_mbx_issue_link_down(struct lpfc_hba *phba)
1154 {
1155         lpfc_linkdown(phba);
1156         lpfc_enable_la(phba);
1157         /* turn on Link Attention interrupts - no CLEAR_LA needed */
1158 }
1159
1160
1161 /*
1162  * This routine handles processing a READ_LA mailbox
1163  * command upon completion. It is setup in the LPFC_MBOXQ
1164  * as the completion routine when the command is
1165  * handed off to the SLI layer.
1166  */
1167 void
1168 lpfc_mbx_cmpl_read_la(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
1169 {
1170         struct lpfc_vport *vport = pmb->vport;
1171         struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
1172         READ_LA_VAR *la;
1173         MAILBOX_t *mb = &pmb->mb;
1174         struct lpfc_dmabuf *mp = (struct lpfc_dmabuf *) (pmb->context1);
1175
1176         /* Unblock ELS traffic */
1177         phba->sli.ring[LPFC_ELS_RING].flag &= ~LPFC_STOP_IOCB_EVENT;
1178         /* Check for error */
1179         if (mb->mbxStatus) {
1180                 lpfc_printf_log(phba, KERN_INFO, LOG_LINK_EVENT,
1181                                 "1307 READ_LA mbox error x%x state x%x\n",
1182                                 mb->mbxStatus, vport->port_state);
1183                 lpfc_mbx_issue_link_down(phba);
1184                 phba->link_state = LPFC_HBA_ERROR;
1185                 goto lpfc_mbx_cmpl_read_la_free_mbuf;
1186         }
1187
1188         la = (READ_LA_VAR *) & pmb->mb.un.varReadLA;
1189
1190         memcpy(&phba->alpa_map[0], mp->virt, 128);
1191
1192         spin_lock_irq(shost->host_lock);
1193         if (la->pb)
1194                 vport->fc_flag |= FC_BYPASSED_MODE;
1195         else
1196                 vport->fc_flag &= ~FC_BYPASSED_MODE;
1197         spin_unlock_irq(shost->host_lock);
1198
1199         if (((phba->fc_eventTag + 1) < la->eventTag) ||
1200             (phba->fc_eventTag == la->eventTag)) {
1201                 phba->fc_stat.LinkMultiEvent++;
1202                 if (la->attType == AT_LINK_UP)
1203                         if (phba->fc_eventTag != 0)
1204                                 lpfc_linkdown(phba);
1205         }
1206
1207         phba->fc_eventTag = la->eventTag;
1208         if (la->mm)
1209                 phba->sli.sli_flag |= LPFC_MENLO_MAINT;
1210         else
1211                 phba->sli.sli_flag &= ~LPFC_MENLO_MAINT;
1212
1213         if (la->attType == AT_LINK_UP && (!la->mm)) {
1214                 phba->fc_stat.LinkUp++;
1215                 if (phba->link_flag & LS_LOOPBACK_MODE) {
1216                         lpfc_printf_log(phba, KERN_ERR, LOG_LINK_EVENT,
1217                                         "1306 Link Up Event in loop back mode "
1218                                         "x%x received Data: x%x x%x x%x x%x\n",
1219                                         la->eventTag, phba->fc_eventTag,
1220                                         la->granted_AL_PA, la->UlnkSpeed,
1221                                         phba->alpa_map[0]);
1222                 } else {
1223                         lpfc_printf_log(phba, KERN_ERR, LOG_LINK_EVENT,
1224                                         "1303 Link Up Event x%x received "
1225                                         "Data: x%x x%x x%x x%x x%x x%x %d\n",
1226                                         la->eventTag, phba->fc_eventTag,
1227                                         la->granted_AL_PA, la->UlnkSpeed,
1228                                         phba->alpa_map[0],
1229                                         la->mm, la->fa,
1230                                         phba->wait_4_mlo_maint_flg);
1231                 }
1232                 lpfc_mbx_process_link_up(phba, la);
1233         } else if (la->attType == AT_LINK_DOWN) {
1234                 phba->fc_stat.LinkDown++;
1235                 if (phba->link_flag & LS_LOOPBACK_MODE) {
1236                         lpfc_printf_log(phba, KERN_ERR, LOG_LINK_EVENT,
1237                                 "1308 Link Down Event in loop back mode "
1238                                 "x%x received "
1239                                 "Data: x%x x%x x%x\n",
1240                                 la->eventTag, phba->fc_eventTag,
1241                                 phba->pport->port_state, vport->fc_flag);
1242                 }
1243                 else {
1244                         lpfc_printf_log(phba, KERN_ERR, LOG_LINK_EVENT,
1245                                 "1305 Link Down Event x%x received "
1246                                 "Data: x%x x%x x%x x%x x%x\n",
1247                                 la->eventTag, phba->fc_eventTag,
1248                                 phba->pport->port_state, vport->fc_flag,
1249                                 la->mm, la->fa);
1250                 }
1251                 lpfc_mbx_issue_link_down(phba);
1252         }
1253         if (la->mm && la->attType == AT_LINK_UP) {
1254                 if (phba->link_state != LPFC_LINK_DOWN) {
1255                         phba->fc_stat.LinkDown++;
1256                         lpfc_printf_log(phba, KERN_ERR, LOG_LINK_EVENT,
1257                                 "1312 Link Down Event x%x received "
1258                                 "Data: x%x x%x x%x\n",
1259                                 la->eventTag, phba->fc_eventTag,
1260                                 phba->pport->port_state, vport->fc_flag);
1261                         lpfc_mbx_issue_link_down(phba);
1262                 } else
1263                         lpfc_enable_la(phba);
1264
1265                 lpfc_printf_log(phba, KERN_ERR, LOG_LINK_EVENT,
1266                                 "1310 Menlo Maint Mode Link up Event x%x rcvd "
1267                                 "Data: x%x x%x x%x\n",
1268                                 la->eventTag, phba->fc_eventTag,
1269                                 phba->pport->port_state, vport->fc_flag);
1270                 /*
1271                  * The cmnd that triggered this will be waiting for this
1272                  * signal.
1273                  */
1274                 /* WAKEUP for MENLO_SET_MODE or MENLO_RESET command. */
1275                 if (phba->wait_4_mlo_maint_flg) {
1276                         phba->wait_4_mlo_maint_flg = 0;
1277                         wake_up_interruptible(&phba->wait_4_mlo_m_q);
1278                 }
1279         }
1280
1281         if (la->fa) {
1282                 if (la->mm)
1283                         lpfc_issue_clear_la(phba, vport);
1284                 lpfc_printf_log(phba, KERN_INFO, LOG_LINK_EVENT,
1285                                 "1311 fa %d\n", la->fa);
1286         }
1287
1288 lpfc_mbx_cmpl_read_la_free_mbuf:
1289         lpfc_mbuf_free(phba, mp->virt, mp->phys);
1290         kfree(mp);
1291         mempool_free(pmb, phba->mbox_mem_pool);
1292         return;
1293 }
1294
1295 /*
1296  * This routine handles processing a REG_LOGIN mailbox
1297  * command upon completion. It is setup in the LPFC_MBOXQ
1298  * as the completion routine when the command is
1299  * handed off to the SLI layer.
1300  */
1301 void
1302 lpfc_mbx_cmpl_reg_login(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
1303 {
1304         struct lpfc_vport  *vport = pmb->vport;
1305         struct lpfc_dmabuf *mp = (struct lpfc_dmabuf *) (pmb->context1);
1306         struct lpfc_nodelist *ndlp = (struct lpfc_nodelist *) pmb->context2;
1307
1308         pmb->context1 = NULL;
1309
1310         /* Good status, call state machine */
1311         lpfc_disc_state_machine(vport, ndlp, pmb, NLP_EVT_CMPL_REG_LOGIN);
1312         lpfc_mbuf_free(phba, mp->virt, mp->phys);
1313         kfree(mp);
1314         mempool_free(pmb, phba->mbox_mem_pool);
1315         /* decrement the node reference count held for this callback
1316          * function.
1317          */
1318         lpfc_nlp_put(ndlp);
1319
1320         return;
1321 }
1322
1323 static void
1324 lpfc_mbx_cmpl_unreg_vpi(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
1325 {
1326         MAILBOX_t *mb = &pmb->mb;
1327         struct lpfc_vport *vport = pmb->vport;
1328         struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
1329
1330         switch (mb->mbxStatus) {
1331         case 0x0011:
1332         case 0x0020:
1333         case 0x9700:
1334                 lpfc_printf_vlog(vport, KERN_INFO, LOG_NODE,
1335                                  "0911 cmpl_unreg_vpi, mb status = 0x%x\n",
1336                                  mb->mbxStatus);
1337                 break;
1338         }
1339         vport->unreg_vpi_cmpl = VPORT_OK;
1340         mempool_free(pmb, phba->mbox_mem_pool);
1341         /*
1342          * This shost reference might have been taken at the beginning of
1343          * lpfc_vport_delete()
1344          */
1345         if (vport->load_flag & FC_UNLOADING)
1346                 scsi_host_put(shost);
1347 }
1348
1349 int
1350 lpfc_mbx_unreg_vpi(struct lpfc_vport *vport)
1351 {
1352         struct lpfc_hba  *phba = vport->phba;
1353         LPFC_MBOXQ_t *mbox;
1354         int rc;
1355
1356         mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
1357         if (!mbox)
1358                 return 1;
1359
1360         lpfc_unreg_vpi(phba, vport->vpi, mbox);
1361         mbox->vport = vport;
1362         mbox->mbox_cmpl = lpfc_mbx_cmpl_unreg_vpi;
1363         rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
1364         if (rc == MBX_NOT_FINISHED) {
1365                 lpfc_printf_vlog(vport, KERN_ERR, LOG_MBOX | LOG_VPORT,
1366                                  "1800 Could not issue unreg_vpi\n");
1367                 mempool_free(mbox, phba->mbox_mem_pool);
1368                 vport->unreg_vpi_cmpl = VPORT_ERROR;
1369                 return rc;
1370         }
1371         return 0;
1372 }
1373
1374 static void
1375 lpfc_mbx_cmpl_reg_vpi(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
1376 {
1377         struct lpfc_vport *vport = pmb->vport;
1378         struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
1379         MAILBOX_t *mb = &pmb->mb;
1380
1381         switch (mb->mbxStatus) {
1382         case 0x0011:
1383         case 0x9601:
1384         case 0x9602:
1385                 lpfc_printf_vlog(vport, KERN_INFO, LOG_NODE,
1386                                  "0912 cmpl_reg_vpi, mb status = 0x%x\n",
1387                                  mb->mbxStatus);
1388                 lpfc_vport_set_state(vport, FC_VPORT_FAILED);
1389                 spin_lock_irq(shost->host_lock);
1390                 vport->fc_flag &= ~(FC_FABRIC | FC_PUBLIC_LOOP);
1391                 spin_unlock_irq(shost->host_lock);
1392                 vport->fc_myDID = 0;
1393                 goto out;
1394         }
1395
1396         vport->num_disc_nodes = 0;
1397         /* go thru NPR list and issue ELS PLOGIs */
1398         if (vport->fc_npr_cnt)
1399                 lpfc_els_disc_plogi(vport);
1400
1401         if (!vport->num_disc_nodes) {
1402                 spin_lock_irq(shost->host_lock);
1403                 vport->fc_flag &= ~FC_NDISC_ACTIVE;
1404                 spin_unlock_irq(shost->host_lock);
1405                 lpfc_can_disctmo(vport);
1406         }
1407         vport->port_state = LPFC_VPORT_READY;
1408
1409 out:
1410         mempool_free(pmb, phba->mbox_mem_pool);
1411         return;
1412 }
1413
1414 /*
1415  * This routine handles processing a Fabric REG_LOGIN mailbox
1416  * command upon completion. It is setup in the LPFC_MBOXQ
1417  * as the completion routine when the command is
1418  * handed off to the SLI layer.
1419  */
1420 void
1421 lpfc_mbx_cmpl_fabric_reg_login(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
1422 {
1423         struct lpfc_vport *vport = pmb->vport;
1424         MAILBOX_t *mb = &pmb->mb;
1425         struct lpfc_dmabuf *mp = (struct lpfc_dmabuf *) (pmb->context1);
1426         struct lpfc_nodelist *ndlp;
1427         struct lpfc_vport **vports;
1428         int i;
1429
1430         ndlp = (struct lpfc_nodelist *) pmb->context2;
1431         pmb->context1 = NULL;
1432         pmb->context2 = NULL;
1433         if (mb->mbxStatus) {
1434                 lpfc_mbuf_free(phba, mp->virt, mp->phys);
1435                 kfree(mp);
1436                 mempool_free(pmb, phba->mbox_mem_pool);
1437
1438                 if (phba->fc_topology == TOPOLOGY_LOOP) {
1439                         /* FLOGI failed, use loop map to make discovery list */
1440                         lpfc_disc_list_loopmap(vport);
1441
1442                         /* Start discovery */
1443                         lpfc_disc_start(vport);
1444                         /* Decrement the reference count to ndlp after the
1445                          * reference to the ndlp are done.
1446                          */
1447                         lpfc_nlp_put(ndlp);
1448                         return;
1449                 }
1450
1451                 lpfc_vport_set_state(vport, FC_VPORT_FAILED);
1452                 lpfc_printf_vlog(vport, KERN_ERR, LOG_MBOX,
1453                                  "0258 Register Fabric login error: 0x%x\n",
1454                                  mb->mbxStatus);
1455                 /* Decrement the reference count to ndlp after the reference
1456                  * to the ndlp are done.
1457                  */
1458                 lpfc_nlp_put(ndlp);
1459                 return;
1460         }
1461
1462         ndlp->nlp_rpi = mb->un.varWords[0];
1463         ndlp->nlp_type |= NLP_FABRIC;
1464         lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
1465
1466         if (vport->port_state == LPFC_FABRIC_CFG_LINK) {
1467                 vports = lpfc_create_vport_work_array(phba);
1468                 if (vports != NULL)
1469                         for(i = 0;
1470                             i <= phba->max_vpi && vports[i] != NULL;
1471                             i++) {
1472                                 if (vports[i]->port_type == LPFC_PHYSICAL_PORT)
1473                                         continue;
1474                                 if (phba->fc_topology == TOPOLOGY_LOOP) {
1475                                         lpfc_vport_set_state(vports[i],
1476                                                         FC_VPORT_LINKDOWN);
1477                                         continue;
1478                                 }
1479                                 if (phba->link_flag & LS_NPIV_FAB_SUPPORTED)
1480                                         lpfc_initial_fdisc(vports[i]);
1481                                 else {
1482                                         lpfc_vport_set_state(vports[i],
1483                                                 FC_VPORT_NO_FABRIC_SUPP);
1484                                         lpfc_printf_vlog(vport, KERN_ERR,
1485                                                          LOG_ELS,
1486                                                         "0259 No NPIV "
1487                                                         "Fabric support\n");
1488                                 }
1489                         }
1490                 lpfc_destroy_vport_work_array(phba, vports);
1491                 lpfc_do_scr_ns_plogi(phba, vport);
1492         }
1493
1494         lpfc_mbuf_free(phba, mp->virt, mp->phys);
1495         kfree(mp);
1496         mempool_free(pmb, phba->mbox_mem_pool);
1497
1498         /* Drop the reference count from the mbox at the end after
1499          * all the current reference to the ndlp have been done.
1500          */
1501         lpfc_nlp_put(ndlp);
1502         return;
1503 }
1504
1505 /*
1506  * This routine handles processing a NameServer REG_LOGIN mailbox
1507  * command upon completion. It is setup in the LPFC_MBOXQ
1508  * as the completion routine when the command is
1509  * handed off to the SLI layer.
1510  */
1511 void
1512 lpfc_mbx_cmpl_ns_reg_login(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
1513 {
1514         MAILBOX_t *mb = &pmb->mb;
1515         struct lpfc_dmabuf *mp = (struct lpfc_dmabuf *) (pmb->context1);
1516         struct lpfc_nodelist *ndlp = (struct lpfc_nodelist *) pmb->context2;
1517         struct lpfc_vport *vport = pmb->vport;
1518
1519         if (mb->mbxStatus) {
1520 out:
1521                 /* decrement the node reference count held for this
1522                  * callback function.
1523                  */
1524                 lpfc_nlp_put(ndlp);
1525                 lpfc_mbuf_free(phba, mp->virt, mp->phys);
1526                 kfree(mp);
1527                 mempool_free(pmb, phba->mbox_mem_pool);
1528
1529                 /* If no other thread is using the ndlp, free it */
1530                 lpfc_nlp_not_used(ndlp);
1531
1532                 if (phba->fc_topology == TOPOLOGY_LOOP) {
1533                         /*
1534                          * RegLogin failed, use loop map to make discovery
1535                          * list
1536                          */
1537                         lpfc_disc_list_loopmap(vport);
1538
1539                         /* Start discovery */
1540                         lpfc_disc_start(vport);
1541                         return;
1542                 }
1543                 lpfc_vport_set_state(vport, FC_VPORT_FAILED);
1544                 lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
1545                                  "0260 Register NameServer error: 0x%x\n",
1546                                  mb->mbxStatus);
1547                 return;
1548         }
1549
1550         pmb->context1 = NULL;
1551
1552         ndlp->nlp_rpi = mb->un.varWords[0];
1553         ndlp->nlp_type |= NLP_FABRIC;
1554         lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
1555
1556         if (vport->port_state < LPFC_VPORT_READY) {
1557                 /* Link up discovery requires Fabric registration. */
1558                 lpfc_ns_cmd(vport, SLI_CTNS_RFF_ID, 0, 0); /* Do this first! */
1559                 lpfc_ns_cmd(vport, SLI_CTNS_RNN_ID, 0, 0);
1560                 lpfc_ns_cmd(vport, SLI_CTNS_RSNN_NN, 0, 0);
1561                 lpfc_ns_cmd(vport, SLI_CTNS_RSPN_ID, 0, 0);
1562                 lpfc_ns_cmd(vport, SLI_CTNS_RFT_ID, 0, 0);
1563
1564                 /* Issue SCR just before NameServer GID_FT Query */
1565                 lpfc_issue_els_scr(vport, SCR_DID, 0);
1566         }
1567
1568         vport->fc_ns_retry = 0;
1569         /* Good status, issue CT Request to NameServer */
1570         if (lpfc_ns_cmd(vport, SLI_CTNS_GID_FT, 0, 0)) {
1571                 /* Cannot issue NameServer Query, so finish up discovery */
1572                 goto out;
1573         }
1574
1575         /* decrement the node reference count held for this
1576          * callback function.
1577          */
1578         lpfc_nlp_put(ndlp);
1579         lpfc_mbuf_free(phba, mp->virt, mp->phys);
1580         kfree(mp);
1581         mempool_free(pmb, phba->mbox_mem_pool);
1582
1583         return;
1584 }
1585
1586 static void
1587 lpfc_register_remote_port(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
1588 {
1589         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1590         struct fc_rport  *rport;
1591         struct lpfc_rport_data *rdata;
1592         struct fc_rport_identifiers rport_ids;
1593         struct lpfc_hba  *phba = vport->phba;
1594
1595         /* Remote port has reappeared. Re-register w/ FC transport */
1596         rport_ids.node_name = wwn_to_u64(ndlp->nlp_nodename.u.wwn);
1597         rport_ids.port_name = wwn_to_u64(ndlp->nlp_portname.u.wwn);
1598         rport_ids.port_id = ndlp->nlp_DID;
1599         rport_ids.roles = FC_RPORT_ROLE_UNKNOWN;
1600
1601         /*
1602          * We leave our node pointer in rport->dd_data when we unregister a
1603          * FCP target port.  But fc_remote_port_add zeros the space to which
1604          * rport->dd_data points.  So, if we're reusing a previously
1605          * registered port, drop the reference that we took the last time we
1606          * registered the port.
1607          */
1608         if (ndlp->rport && ndlp->rport->dd_data &&
1609             ((struct lpfc_rport_data *) ndlp->rport->dd_data)->pnode == ndlp)
1610                 lpfc_nlp_put(ndlp);
1611
1612         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_RPORT,
1613                 "rport add:       did:x%x flg:x%x type x%x",
1614                 ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_type);
1615
1616         ndlp->rport = rport = fc_remote_port_add(shost, 0, &rport_ids);
1617         if (!rport || !get_device(&rport->dev)) {
1618                 dev_printk(KERN_WARNING, &phba->pcidev->dev,
1619                            "Warning: fc_remote_port_add failed\n");
1620                 return;
1621         }
1622
1623         /* initialize static port data */
1624         rport->maxframe_size = ndlp->nlp_maxframe;
1625         rport->supported_classes = ndlp->nlp_class_sup;
1626         rdata = rport->dd_data;
1627         rdata->pnode = lpfc_nlp_get(ndlp);
1628
1629         if (ndlp->nlp_type & NLP_FCP_TARGET)
1630                 rport_ids.roles |= FC_RPORT_ROLE_FCP_TARGET;
1631         if (ndlp->nlp_type & NLP_FCP_INITIATOR)
1632                 rport_ids.roles |= FC_RPORT_ROLE_FCP_INITIATOR;
1633
1634
1635         if (rport_ids.roles !=  FC_RPORT_ROLE_UNKNOWN)
1636                 fc_remote_port_rolechg(rport, rport_ids.roles);
1637
1638         if ((rport->scsi_target_id != -1) &&
1639             (rport->scsi_target_id < LPFC_MAX_TARGET)) {
1640                 ndlp->nlp_sid = rport->scsi_target_id;
1641         }
1642         return;
1643 }
1644
1645 static void
1646 lpfc_unregister_remote_port(struct lpfc_nodelist *ndlp)
1647 {
1648         struct fc_rport *rport = ndlp->rport;
1649
1650         lpfc_debugfs_disc_trc(ndlp->vport, LPFC_DISC_TRC_RPORT,
1651                 "rport delete:    did:x%x flg:x%x type x%x",
1652                 ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_type);
1653
1654         fc_remote_port_delete(rport);
1655
1656         return;
1657 }
1658
1659 static void
1660 lpfc_nlp_counters(struct lpfc_vport *vport, int state, int count)
1661 {
1662         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1663
1664         spin_lock_irq(shost->host_lock);
1665         switch (state) {
1666         case NLP_STE_UNUSED_NODE:
1667                 vport->fc_unused_cnt += count;
1668                 break;
1669         case NLP_STE_PLOGI_ISSUE:
1670                 vport->fc_plogi_cnt += count;
1671                 break;
1672         case NLP_STE_ADISC_ISSUE:
1673                 vport->fc_adisc_cnt += count;
1674                 break;
1675         case NLP_STE_REG_LOGIN_ISSUE:
1676                 vport->fc_reglogin_cnt += count;
1677                 break;
1678         case NLP_STE_PRLI_ISSUE:
1679                 vport->fc_prli_cnt += count;
1680                 break;
1681         case NLP_STE_UNMAPPED_NODE:
1682                 vport->fc_unmap_cnt += count;
1683                 break;
1684         case NLP_STE_MAPPED_NODE:
1685                 vport->fc_map_cnt += count;
1686                 break;
1687         case NLP_STE_NPR_NODE:
1688                 vport->fc_npr_cnt += count;
1689                 break;
1690         }
1691         spin_unlock_irq(shost->host_lock);
1692 }
1693
1694 static void
1695 lpfc_nlp_state_cleanup(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1696                        int old_state, int new_state)
1697 {
1698         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1699
1700         if (new_state == NLP_STE_UNMAPPED_NODE) {
1701                 ndlp->nlp_type &= ~(NLP_FCP_TARGET | NLP_FCP_INITIATOR);
1702                 ndlp->nlp_flag &= ~NLP_NODEV_REMOVE;
1703                 ndlp->nlp_type |= NLP_FC_NODE;
1704         }
1705         if (new_state == NLP_STE_MAPPED_NODE)
1706                 ndlp->nlp_flag &= ~NLP_NODEV_REMOVE;
1707         if (new_state == NLP_STE_NPR_NODE)
1708                 ndlp->nlp_flag &= ~NLP_RCV_PLOGI;
1709
1710         /* Transport interface */
1711         if (ndlp->rport && (old_state == NLP_STE_MAPPED_NODE ||
1712                             old_state == NLP_STE_UNMAPPED_NODE)) {
1713                 vport->phba->nport_event_cnt++;
1714                 lpfc_unregister_remote_port(ndlp);
1715         }
1716
1717         if (new_state ==  NLP_STE_MAPPED_NODE ||
1718             new_state == NLP_STE_UNMAPPED_NODE) {
1719                 vport->phba->nport_event_cnt++;
1720                 /*
1721                  * Tell the fc transport about the port, if we haven't
1722                  * already. If we have, and it's a scsi entity, be
1723                  * sure to unblock any attached scsi devices
1724                  */
1725                 lpfc_register_remote_port(vport, ndlp);
1726         }
1727         if ((new_state ==  NLP_STE_MAPPED_NODE) &&
1728                 (vport->stat_data_enabled)) {
1729                 /*
1730                  * A new target is discovered, if there is no buffer for
1731                  * statistical data collection allocate buffer.
1732                  */
1733                 ndlp->lat_data = kcalloc(LPFC_MAX_BUCKET_COUNT,
1734                                          sizeof(struct lpfc_scsicmd_bkt),
1735                                          GFP_KERNEL);
1736
1737                 if (!ndlp->lat_data)
1738                         lpfc_printf_vlog(vport, KERN_ERR, LOG_NODE,
1739                                 "0286 lpfc_nlp_state_cleanup failed to "
1740                                 "allocate statistical data buffer DID "
1741                                 "0x%x\n", ndlp->nlp_DID);
1742         }
1743         /*
1744          * if we added to Mapped list, but the remote port
1745          * registration failed or assigned a target id outside
1746          * our presentable range - move the node to the
1747          * Unmapped List
1748          */
1749         if (new_state == NLP_STE_MAPPED_NODE &&
1750             (!ndlp->rport ||
1751              ndlp->rport->scsi_target_id == -1 ||
1752              ndlp->rport->scsi_target_id >= LPFC_MAX_TARGET)) {
1753                 spin_lock_irq(shost->host_lock);
1754                 ndlp->nlp_flag |= NLP_TGT_NO_SCSIID;
1755                 spin_unlock_irq(shost->host_lock);
1756                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
1757         }
1758 }
1759
1760 static char *
1761 lpfc_nlp_state_name(char *buffer, size_t size, int state)
1762 {
1763         static char *states[] = {
1764                 [NLP_STE_UNUSED_NODE] = "UNUSED",
1765                 [NLP_STE_PLOGI_ISSUE] = "PLOGI",
1766                 [NLP_STE_ADISC_ISSUE] = "ADISC",
1767                 [NLP_STE_REG_LOGIN_ISSUE] = "REGLOGIN",
1768                 [NLP_STE_PRLI_ISSUE] = "PRLI",
1769                 [NLP_STE_UNMAPPED_NODE] = "UNMAPPED",
1770                 [NLP_STE_MAPPED_NODE] = "MAPPED",
1771                 [NLP_STE_NPR_NODE] = "NPR",
1772         };
1773
1774         if (state < NLP_STE_MAX_STATE && states[state])
1775                 strlcpy(buffer, states[state], size);
1776         else
1777                 snprintf(buffer, size, "unknown (%d)", state);
1778         return buffer;
1779 }
1780
1781 void
1782 lpfc_nlp_set_state(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1783                    int state)
1784 {
1785         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1786         int  old_state = ndlp->nlp_state;
1787         char name1[16], name2[16];
1788
1789         lpfc_printf_vlog(vport, KERN_INFO, LOG_NODE,
1790                          "0904 NPort state transition x%06x, %s -> %s\n",
1791                          ndlp->nlp_DID,
1792                          lpfc_nlp_state_name(name1, sizeof(name1), old_state),
1793                          lpfc_nlp_state_name(name2, sizeof(name2), state));
1794
1795         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_NODE,
1796                 "node statechg    did:x%x old:%d ste:%d",
1797                 ndlp->nlp_DID, old_state, state);
1798
1799         if (old_state == NLP_STE_NPR_NODE &&
1800             state != NLP_STE_NPR_NODE)
1801                 lpfc_cancel_retry_delay_tmo(vport, ndlp);
1802         if (old_state == NLP_STE_UNMAPPED_NODE) {
1803                 ndlp->nlp_flag &= ~NLP_TGT_NO_SCSIID;
1804                 ndlp->nlp_type &= ~NLP_FC_NODE;
1805         }
1806
1807         if (list_empty(&ndlp->nlp_listp)) {
1808                 spin_lock_irq(shost->host_lock);
1809                 list_add_tail(&ndlp->nlp_listp, &vport->fc_nodes);
1810                 spin_unlock_irq(shost->host_lock);
1811         } else if (old_state)
1812                 lpfc_nlp_counters(vport, old_state, -1);
1813
1814         ndlp->nlp_state = state;
1815         lpfc_nlp_counters(vport, state, 1);
1816         lpfc_nlp_state_cleanup(vport, ndlp, old_state, state);
1817 }
1818
1819 void
1820 lpfc_enqueue_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
1821 {
1822         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1823
1824         if (list_empty(&ndlp->nlp_listp)) {
1825                 spin_lock_irq(shost->host_lock);
1826                 list_add_tail(&ndlp->nlp_listp, &vport->fc_nodes);
1827                 spin_unlock_irq(shost->host_lock);
1828         }
1829 }
1830
1831 void
1832 lpfc_dequeue_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
1833 {
1834         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1835
1836         lpfc_cancel_retry_delay_tmo(vport, ndlp);
1837         if (ndlp->nlp_state && !list_empty(&ndlp->nlp_listp))
1838                 lpfc_nlp_counters(vport, ndlp->nlp_state, -1);
1839         spin_lock_irq(shost->host_lock);
1840         list_del_init(&ndlp->nlp_listp);
1841         spin_unlock_irq(shost->host_lock);
1842         lpfc_nlp_state_cleanup(vport, ndlp, ndlp->nlp_state,
1843                                 NLP_STE_UNUSED_NODE);
1844 }
1845
1846 static void
1847 lpfc_disable_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
1848 {
1849         lpfc_cancel_retry_delay_tmo(vport, ndlp);
1850         if (ndlp->nlp_state && !list_empty(&ndlp->nlp_listp))
1851                 lpfc_nlp_counters(vport, ndlp->nlp_state, -1);
1852         lpfc_nlp_state_cleanup(vport, ndlp, ndlp->nlp_state,
1853                                 NLP_STE_UNUSED_NODE);
1854 }
1855
1856 struct lpfc_nodelist *
1857 lpfc_enable_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1858                  int state)
1859 {
1860         struct lpfc_hba *phba = vport->phba;
1861         uint32_t did;
1862         unsigned long flags;
1863
1864         if (!ndlp)
1865                 return NULL;
1866
1867         spin_lock_irqsave(&phba->ndlp_lock, flags);
1868         /* The ndlp should not be in memory free mode */
1869         if (NLP_CHK_FREE_REQ(ndlp)) {
1870                 spin_unlock_irqrestore(&phba->ndlp_lock, flags);
1871                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_NODE,
1872                                 "0277 lpfc_enable_node: ndlp:x%p "
1873                                 "usgmap:x%x refcnt:%d\n",
1874                                 (void *)ndlp, ndlp->nlp_usg_map,
1875                                 atomic_read(&ndlp->kref.refcount));
1876                 return NULL;
1877         }
1878         /* The ndlp should not already be in active mode */
1879         if (NLP_CHK_NODE_ACT(ndlp)) {
1880                 spin_unlock_irqrestore(&phba->ndlp_lock, flags);
1881                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_NODE,
1882                                 "0278 lpfc_enable_node: ndlp:x%p "
1883                                 "usgmap:x%x refcnt:%d\n",
1884                                 (void *)ndlp, ndlp->nlp_usg_map,
1885                                 atomic_read(&ndlp->kref.refcount));
1886                 return NULL;
1887         }
1888
1889         /* Keep the original DID */
1890         did = ndlp->nlp_DID;
1891
1892         /* re-initialize ndlp except of ndlp linked list pointer */
1893         memset((((char *)ndlp) + sizeof (struct list_head)), 0,
1894                 sizeof (struct lpfc_nodelist) - sizeof (struct list_head));
1895         INIT_LIST_HEAD(&ndlp->els_retry_evt.evt_listp);
1896         INIT_LIST_HEAD(&ndlp->dev_loss_evt.evt_listp);
1897         init_timer(&ndlp->nlp_delayfunc);
1898         ndlp->nlp_delayfunc.function = lpfc_els_retry_delay;
1899         ndlp->nlp_delayfunc.data = (unsigned long)ndlp;
1900         ndlp->nlp_DID = did;
1901         ndlp->vport = vport;
1902         ndlp->nlp_sid = NLP_NO_SID;
1903         /* ndlp management re-initialize */
1904         kref_init(&ndlp->kref);
1905         NLP_INT_NODE_ACT(ndlp);
1906
1907         spin_unlock_irqrestore(&phba->ndlp_lock, flags);
1908
1909         if (state != NLP_STE_UNUSED_NODE)
1910                 lpfc_nlp_set_state(vport, ndlp, state);
1911
1912         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_NODE,
1913                 "node enable:       did:x%x",
1914                 ndlp->nlp_DID, 0, 0);
1915         return ndlp;
1916 }
1917
1918 void
1919 lpfc_drop_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
1920 {
1921         /*
1922          * Use of lpfc_drop_node and UNUSED list: lpfc_drop_node should
1923          * be used if we wish to issue the "last" lpfc_nlp_put() to remove
1924          * the ndlp from the vport. The ndlp marked as UNUSED on the list
1925          * until ALL other outstanding threads have completed. We check
1926          * that the ndlp not already in the UNUSED state before we proceed.
1927          */
1928         if (ndlp->nlp_state == NLP_STE_UNUSED_NODE)
1929                 return;
1930         lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNUSED_NODE);
1931         lpfc_nlp_put(ndlp);
1932         return;
1933 }
1934
1935 /*
1936  * Start / ReStart rescue timer for Discovery / RSCN handling
1937  */
1938 void
1939 lpfc_set_disctmo(struct lpfc_vport *vport)
1940 {
1941         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1942         struct lpfc_hba  *phba = vport->phba;
1943         uint32_t tmo;
1944
1945         if (vport->port_state == LPFC_LOCAL_CFG_LINK) {
1946                 /* For FAN, timeout should be greater then edtov */
1947                 tmo = (((phba->fc_edtov + 999) / 1000) + 1);
1948         } else {
1949                 /* Normal discovery timeout should be > then ELS/CT timeout
1950                  * FC spec states we need 3 * ratov for CT requests
1951                  */
1952                 tmo = ((phba->fc_ratov * 3) + 3);
1953         }
1954
1955
1956         if (!timer_pending(&vport->fc_disctmo)) {
1957                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
1958                         "set disc timer:  tmo:x%x state:x%x flg:x%x",
1959                         tmo, vport->port_state, vport->fc_flag);
1960         }
1961
1962         mod_timer(&vport->fc_disctmo, jiffies + HZ * tmo);
1963         spin_lock_irq(shost->host_lock);
1964         vport->fc_flag |= FC_DISC_TMO;
1965         spin_unlock_irq(shost->host_lock);
1966
1967         /* Start Discovery Timer state <hba_state> */
1968         lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
1969                          "0247 Start Discovery Timer state x%x "
1970                          "Data: x%x x%lx x%x x%x\n",
1971                          vport->port_state, tmo,
1972                          (unsigned long)&vport->fc_disctmo, vport->fc_plogi_cnt,
1973                          vport->fc_adisc_cnt);
1974
1975         return;
1976 }
1977
1978 /*
1979  * Cancel rescue timer for Discovery / RSCN handling
1980  */
1981 int
1982 lpfc_can_disctmo(struct lpfc_vport *vport)
1983 {
1984         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1985         unsigned long iflags;
1986
1987         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
1988                 "can disc timer:  state:x%x rtry:x%x flg:x%x",
1989                 vport->port_state, vport->fc_ns_retry, vport->fc_flag);
1990
1991         /* Turn off discovery timer if its running */
1992         if (vport->fc_flag & FC_DISC_TMO) {
1993                 spin_lock_irqsave(shost->host_lock, iflags);
1994                 vport->fc_flag &= ~FC_DISC_TMO;
1995                 spin_unlock_irqrestore(shost->host_lock, iflags);
1996                 del_timer_sync(&vport->fc_disctmo);
1997                 spin_lock_irqsave(&vport->work_port_lock, iflags);
1998                 vport->work_port_events &= ~WORKER_DISC_TMO;
1999                 spin_unlock_irqrestore(&vport->work_port_lock, iflags);
2000         }
2001
2002         /* Cancel Discovery Timer state <hba_state> */
2003         lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
2004                          "0248 Cancel Discovery Timer state x%x "
2005                          "Data: x%x x%x x%x\n",
2006                          vport->port_state, vport->fc_flag,
2007                          vport->fc_plogi_cnt, vport->fc_adisc_cnt);
2008         return 0;
2009 }
2010
2011 /*
2012  * Check specified ring for outstanding IOCB on the SLI queue
2013  * Return true if iocb matches the specified nport
2014  */
2015 int
2016 lpfc_check_sli_ndlp(struct lpfc_hba *phba,
2017                     struct lpfc_sli_ring *pring,
2018                     struct lpfc_iocbq *iocb,
2019                     struct lpfc_nodelist *ndlp)
2020 {
2021         struct lpfc_sli *psli = &phba->sli;
2022         IOCB_t *icmd = &iocb->iocb;
2023         struct lpfc_vport    *vport = ndlp->vport;
2024
2025         if (iocb->vport != vport)
2026                 return 0;
2027
2028         if (pring->ringno == LPFC_ELS_RING) {
2029                 switch (icmd->ulpCommand) {
2030                 case CMD_GEN_REQUEST64_CR:
2031                         if (icmd->ulpContext == (volatile ushort)ndlp->nlp_rpi)
2032                                 return 1;
2033                 case CMD_ELS_REQUEST64_CR:
2034                         if (icmd->un.elsreq64.remoteID == ndlp->nlp_DID)
2035                                 return 1;
2036                 case CMD_XMIT_ELS_RSP64_CX:
2037                         if (iocb->context1 == (uint8_t *) ndlp)
2038                                 return 1;
2039                 }
2040         } else if (pring->ringno == psli->extra_ring) {
2041
2042         } else if (pring->ringno == psli->fcp_ring) {
2043                 /* Skip match check if waiting to relogin to FCP target */
2044                 if ((ndlp->nlp_type & NLP_FCP_TARGET) &&
2045                     (ndlp->nlp_flag & NLP_DELAY_TMO)) {
2046                         return 0;
2047                 }
2048                 if (icmd->ulpContext == (volatile ushort)ndlp->nlp_rpi) {
2049                         return 1;
2050                 }
2051         } else if (pring->ringno == psli->next_ring) {
2052
2053         }
2054         return 0;
2055 }
2056
2057 /*
2058  * Free resources / clean up outstanding I/Os
2059  * associated with nlp_rpi in the LPFC_NODELIST entry.
2060  */
2061 static int
2062 lpfc_no_rpi(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
2063 {
2064         LIST_HEAD(completions);
2065         struct lpfc_sli *psli;
2066         struct lpfc_sli_ring *pring;
2067         struct lpfc_iocbq *iocb, *next_iocb;
2068         IOCB_t *icmd;
2069         uint32_t rpi, i;
2070
2071         lpfc_fabric_abort_nport(ndlp);
2072
2073         /*
2074          * Everything that matches on txcmplq will be returned
2075          * by firmware with a no rpi error.
2076          */
2077         psli = &phba->sli;
2078         rpi = ndlp->nlp_rpi;
2079         if (rpi) {
2080                 /* Now process each ring */
2081                 for (i = 0; i < psli->num_rings; i++) {
2082                         pring = &psli->ring[i];
2083
2084                         spin_lock_irq(&phba->hbalock);
2085                         list_for_each_entry_safe(iocb, next_iocb, &pring->txq,
2086                                                  list) {
2087                                 /*
2088                                  * Check to see if iocb matches the nport we are
2089                                  * looking for
2090                                  */
2091                                 if ((lpfc_check_sli_ndlp(phba, pring, iocb,
2092                                                          ndlp))) {
2093                                         /* It matches, so deque and call compl
2094                                            with an error */
2095                                         list_move_tail(&iocb->list,
2096                                                        &completions);
2097                                         pring->txq_cnt--;
2098                                 }
2099                         }
2100                         spin_unlock_irq(&phba->hbalock);
2101                 }
2102         }
2103
2104         while (!list_empty(&completions)) {
2105                 iocb = list_get_first(&completions, struct lpfc_iocbq, list);
2106                 list_del_init(&iocb->list);
2107
2108                 if (!iocb->iocb_cmpl)
2109                         lpfc_sli_release_iocbq(phba, iocb);
2110                 else {
2111                         icmd = &iocb->iocb;
2112                         icmd->ulpStatus = IOSTAT_LOCAL_REJECT;
2113                         icmd->un.ulpWord[4] = IOERR_SLI_ABORTED;
2114                         (iocb->iocb_cmpl)(phba, iocb, iocb);
2115                 }
2116         }
2117
2118         return 0;
2119 }
2120
2121 /*
2122  * Free rpi associated with LPFC_NODELIST entry.
2123  * This routine is called from lpfc_freenode(), when we are removing
2124  * a LPFC_NODELIST entry. It is also called if the driver initiates a
2125  * LOGO that completes successfully, and we are waiting to PLOGI back
2126  * to the remote NPort. In addition, it is called after we receive
2127  * and unsolicated ELS cmd, send back a rsp, the rsp completes and
2128  * we are waiting to PLOGI back to the remote NPort.
2129  */
2130 int
2131 lpfc_unreg_rpi(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
2132 {
2133         struct lpfc_hba *phba = vport->phba;
2134         LPFC_MBOXQ_t    *mbox;
2135         int rc;
2136
2137         if (ndlp->nlp_rpi) {
2138                 mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
2139                 if (mbox) {
2140                         lpfc_unreg_login(phba, vport->vpi, ndlp->nlp_rpi, mbox);
2141                         mbox->vport = vport;
2142                         mbox->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
2143                         rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
2144                         if (rc == MBX_NOT_FINISHED)
2145                                 mempool_free(mbox, phba->mbox_mem_pool);
2146                 }
2147                 lpfc_no_rpi(phba, ndlp);
2148                 ndlp->nlp_rpi = 0;
2149                 return 1;
2150         }
2151         return 0;
2152 }
2153
2154 void
2155 lpfc_unreg_all_rpis(struct lpfc_vport *vport)
2156 {
2157         struct lpfc_hba  *phba  = vport->phba;
2158         LPFC_MBOXQ_t     *mbox;
2159         int rc;
2160
2161         mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
2162         if (mbox) {
2163                 lpfc_unreg_login(phba, vport->vpi, 0xffff, mbox);
2164                 mbox->vport = vport;
2165                 mbox->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
2166                 mbox->context1 = NULL;
2167                 rc = lpfc_sli_issue_mbox_wait(phba, mbox, LPFC_MBOX_TMO);
2168                 if (rc == MBX_NOT_FINISHED) {
2169                         mempool_free(mbox, phba->mbox_mem_pool);
2170                 }
2171         }
2172 }
2173
2174 void
2175 lpfc_unreg_default_rpis(struct lpfc_vport *vport)
2176 {
2177         struct lpfc_hba  *phba  = vport->phba;
2178         LPFC_MBOXQ_t     *mbox;
2179         int rc;
2180
2181         mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
2182         if (mbox) {
2183                 lpfc_unreg_did(phba, vport->vpi, 0xffffffff, mbox);
2184                 mbox->vport = vport;
2185                 mbox->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
2186                 mbox->context1 = NULL;
2187                 rc = lpfc_sli_issue_mbox_wait(phba, mbox, LPFC_MBOX_TMO);
2188                 if (rc == MBX_NOT_FINISHED) {
2189                         lpfc_printf_vlog(vport, KERN_ERR, LOG_MBOX | LOG_VPORT,
2190                                          "1815 Could not issue "
2191                                          "unreg_did (default rpis)\n");
2192                         mempool_free(mbox, phba->mbox_mem_pool);
2193                 }
2194         }
2195 }
2196
2197 /*
2198  * Free resources associated with LPFC_NODELIST entry
2199  * so it can be freed.
2200  */
2201 static int
2202 lpfc_cleanup_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
2203 {
2204         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
2205         struct lpfc_hba  *phba = vport->phba;
2206         LPFC_MBOXQ_t *mb, *nextmb;
2207         struct lpfc_dmabuf *mp;
2208
2209         /* Cleanup node for NPort <nlp_DID> */
2210         lpfc_printf_vlog(vport, KERN_INFO, LOG_NODE,
2211                          "0900 Cleanup node for NPort x%x "
2212                          "Data: x%x x%x x%x\n",
2213                          ndlp->nlp_DID, ndlp->nlp_flag,
2214                          ndlp->nlp_state, ndlp->nlp_rpi);
2215         if (NLP_CHK_FREE_REQ(ndlp)) {
2216                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_NODE,
2217                                 "0280 lpfc_cleanup_node: ndlp:x%p "
2218                                 "usgmap:x%x refcnt:%d\n",
2219                                 (void *)ndlp, ndlp->nlp_usg_map,
2220                                 atomic_read(&ndlp->kref.refcount));
2221                 lpfc_dequeue_node(vport, ndlp);
2222         } else {
2223                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_NODE,
2224                                 "0281 lpfc_cleanup_node: ndlp:x%p "
2225                                 "usgmap:x%x refcnt:%d\n",
2226                                 (void *)ndlp, ndlp->nlp_usg_map,
2227                                 atomic_read(&ndlp->kref.refcount));
2228                 lpfc_disable_node(vport, ndlp);
2229         }
2230
2231         /* cleanup any ndlp on mbox q waiting for reglogin cmpl */
2232         if ((mb = phba->sli.mbox_active)) {
2233                 if ((mb->mb.mbxCommand == MBX_REG_LOGIN64) &&
2234                    (ndlp == (struct lpfc_nodelist *) mb->context2)) {
2235                         mb->context2 = NULL;
2236                         mb->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
2237                 }
2238         }
2239
2240         spin_lock_irq(&phba->hbalock);
2241         list_for_each_entry_safe(mb, nextmb, &phba->sli.mboxq, list) {
2242                 if ((mb->mb.mbxCommand == MBX_REG_LOGIN64) &&
2243                     (ndlp == (struct lpfc_nodelist *) mb->context2)) {
2244                         mp = (struct lpfc_dmabuf *) (mb->context1);
2245                         if (mp) {
2246                                 __lpfc_mbuf_free(phba, mp->virt, mp->phys);
2247                                 kfree(mp);
2248                         }
2249                         list_del(&mb->list);
2250                         mempool_free(mb, phba->mbox_mem_pool);
2251                         /* We shall not invoke the lpfc_nlp_put to decrement
2252                          * the ndlp reference count as we are in the process
2253                          * of lpfc_nlp_release.
2254                          */
2255                 }
2256         }
2257         spin_unlock_irq(&phba->hbalock);
2258
2259         lpfc_els_abort(phba, ndlp);
2260
2261         spin_lock_irq(shost->host_lock);
2262         ndlp->nlp_flag &= ~NLP_DELAY_TMO;
2263         spin_unlock_irq(shost->host_lock);
2264
2265         ndlp->nlp_last_elscmd = 0;
2266         del_timer_sync(&ndlp->nlp_delayfunc);
2267
2268         list_del_init(&ndlp->els_retry_evt.evt_listp);
2269         list_del_init(&ndlp->dev_loss_evt.evt_listp);
2270
2271         lpfc_unreg_rpi(vport, ndlp);
2272
2273         return 0;
2274 }
2275
2276 /*
2277  * Check to see if we can free the nlp back to the freelist.
2278  * If we are in the middle of using the nlp in the discovery state
2279  * machine, defer the free till we reach the end of the state machine.
2280  */
2281 static void
2282 lpfc_nlp_remove(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
2283 {
2284         struct lpfc_hba  *phba = vport->phba;
2285         struct lpfc_rport_data *rdata;
2286         LPFC_MBOXQ_t *mbox;
2287         int rc;
2288
2289         lpfc_cancel_retry_delay_tmo(vport, ndlp);
2290         if (ndlp->nlp_flag & NLP_DEFER_RM && !ndlp->nlp_rpi) {
2291                 /* For this case we need to cleanup the default rpi
2292                  * allocated by the firmware.
2293                  */
2294                 if ((mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL))
2295                         != NULL) {
2296                         rc = lpfc_reg_login(phba, vport->vpi, ndlp->nlp_DID,
2297                             (uint8_t *) &vport->fc_sparam, mbox, 0);
2298                         if (rc) {
2299                                 mempool_free(mbox, phba->mbox_mem_pool);
2300                         }
2301                         else {
2302                                 mbox->mbox_flag |= LPFC_MBX_IMED_UNREG;
2303                                 mbox->mbox_cmpl = lpfc_mbx_cmpl_dflt_rpi;
2304                                 mbox->vport = vport;
2305                                 mbox->context2 = NULL;
2306                                 rc =lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
2307                                 if (rc == MBX_NOT_FINISHED) {
2308                                         mempool_free(mbox, phba->mbox_mem_pool);
2309                                 }
2310                         }
2311                 }
2312         }
2313         lpfc_cleanup_node(vport, ndlp);
2314
2315         /*
2316          * We can get here with a non-NULL ndlp->rport because when we
2317          * unregister a rport we don't break the rport/node linkage.  So if we
2318          * do, make sure we don't leaving any dangling pointers behind.
2319          */
2320         if (ndlp->rport) {
2321                 rdata = ndlp->rport->dd_data;
2322                 rdata->pnode = NULL;
2323                 ndlp->rport = NULL;
2324         }
2325 }
2326
2327 static int
2328 lpfc_matchdid(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
2329               uint32_t did)
2330 {
2331         D_ID mydid, ndlpdid, matchdid;
2332
2333         if (did == Bcast_DID)
2334                 return 0;
2335
2336         /* First check for Direct match */
2337         if (ndlp->nlp_DID == did)
2338                 return 1;
2339
2340         /* Next check for area/domain identically equals 0 match */
2341         mydid.un.word = vport->fc_myDID;
2342         if ((mydid.un.b.domain == 0) && (mydid.un.b.area == 0)) {
2343                 return 0;
2344         }
2345
2346         matchdid.un.word = did;
2347         ndlpdid.un.word = ndlp->nlp_DID;
2348         if (matchdid.un.b.id == ndlpdid.un.b.id) {
2349                 if ((mydid.un.b.domain == matchdid.un.b.domain) &&
2350                     (mydid.un.b.area == matchdid.un.b.area)) {
2351                         if ((ndlpdid.un.b.domain == 0) &&
2352                             (ndlpdid.un.b.area == 0)) {
2353                                 if (ndlpdid.un.b.id)
2354                                         return 1;
2355                         }
2356                         return 0;
2357                 }
2358
2359                 matchdid.un.word = ndlp->nlp_DID;
2360                 if ((mydid.un.b.domain == ndlpdid.un.b.domain) &&
2361                     (mydid.un.b.area == ndlpdid.un.b.area)) {
2362                         if ((matchdid.un.b.domain == 0) &&
2363                             (matchdid.un.b.area == 0)) {
2364                                 if (matchdid.un.b.id)
2365                                         return 1;
2366                         }
2367                 }
2368         }
2369         return 0;
2370 }
2371
2372 /* Search for a nodelist entry */
2373 static struct lpfc_nodelist *
2374 __lpfc_findnode_did(struct lpfc_vport *vport, uint32_t did)
2375 {
2376         struct lpfc_nodelist *ndlp;
2377         uint32_t data1;
2378
2379         list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
2380                 if (lpfc_matchdid(vport, ndlp, did)) {
2381                         data1 = (((uint32_t) ndlp->nlp_state << 24) |
2382                                  ((uint32_t) ndlp->nlp_xri << 16) |
2383                                  ((uint32_t) ndlp->nlp_type << 8) |
2384                                  ((uint32_t) ndlp->nlp_rpi & 0xff));
2385                         lpfc_printf_vlog(vport, KERN_INFO, LOG_NODE,
2386                                          "0929 FIND node DID "
2387                                          "Data: x%p x%x x%x x%x\n",
2388                                          ndlp, ndlp->nlp_DID,
2389                                          ndlp->nlp_flag, data1);
2390                         return ndlp;
2391                 }
2392         }
2393
2394         /* FIND node did <did> NOT FOUND */
2395         lpfc_printf_vlog(vport, KERN_INFO, LOG_NODE,
2396                          "0932 FIND node did x%x NOT FOUND.\n", did);
2397         return NULL;
2398 }
2399
2400 struct lpfc_nodelist *
2401 lpfc_findnode_did(struct lpfc_vport *vport, uint32_t did)
2402 {
2403         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
2404         struct lpfc_nodelist *ndlp;
2405
2406         spin_lock_irq(shost->host_lock);
2407         ndlp = __lpfc_findnode_did(vport, did);
2408         spin_unlock_irq(shost->host_lock);
2409         return ndlp;
2410 }
2411
2412 struct lpfc_nodelist *
2413 lpfc_setup_disc_node(struct lpfc_vport *vport, uint32_t did)
2414 {
2415         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
2416         struct lpfc_nodelist *ndlp;
2417
2418         ndlp = lpfc_findnode_did(vport, did);
2419         if (!ndlp) {
2420                 if ((vport->fc_flag & FC_RSCN_MODE) != 0 &&
2421                     lpfc_rscn_payload_check(vport, did) == 0)
2422                         return NULL;
2423                 ndlp = (struct lpfc_nodelist *)
2424                      mempool_alloc(vport->phba->nlp_mem_pool, GFP_KERNEL);
2425                 if (!ndlp)
2426                         return NULL;
2427                 lpfc_nlp_init(vport, ndlp, did);
2428                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
2429                 spin_lock_irq(shost->host_lock);
2430                 ndlp->nlp_flag |= NLP_NPR_2B_DISC;
2431                 spin_unlock_irq(shost->host_lock);
2432                 return ndlp;
2433         } else if (!NLP_CHK_NODE_ACT(ndlp)) {
2434                 ndlp = lpfc_enable_node(vport, ndlp, NLP_STE_NPR_NODE);
2435                 if (!ndlp)
2436                         return NULL;
2437                 spin_lock_irq(shost->host_lock);
2438                 ndlp->nlp_flag |= NLP_NPR_2B_DISC;
2439                 spin_unlock_irq(shost->host_lock);
2440                 return ndlp;
2441         }
2442
2443         if ((vport->fc_flag & FC_RSCN_MODE) &&
2444             !(vport->fc_flag & FC_NDISC_ACTIVE)) {
2445                 if (lpfc_rscn_payload_check(vport, did)) {
2446                         /* If we've already recieved a PLOGI from this NPort
2447                          * we don't need to try to discover it again.
2448                          */
2449                         if (ndlp->nlp_flag & NLP_RCV_PLOGI)
2450                                 return NULL;
2451
2452                         spin_lock_irq(shost->host_lock);
2453                         ndlp->nlp_flag |= NLP_NPR_2B_DISC;
2454                         spin_unlock_irq(shost->host_lock);
2455
2456                         /* Since this node is marked for discovery,
2457                          * delay timeout is not needed.
2458                          */
2459                         lpfc_cancel_retry_delay_tmo(vport, ndlp);
2460                 } else
2461                         ndlp = NULL;
2462         } else {
2463                 /* If we've already recieved a PLOGI from this NPort,
2464                  * or we are already in the process of discovery on it,
2465                  * we don't need to try to discover it again.
2466                  */
2467                 if (ndlp->nlp_state == NLP_STE_ADISC_ISSUE ||
2468                     ndlp->nlp_state == NLP_STE_PLOGI_ISSUE ||
2469                     ndlp->nlp_flag & NLP_RCV_PLOGI)
2470                         return NULL;
2471                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
2472                 spin_lock_irq(shost->host_lock);
2473                 ndlp->nlp_flag |= NLP_NPR_2B_DISC;
2474                 spin_unlock_irq(shost->host_lock);
2475         }
2476         return ndlp;
2477 }
2478
2479 /* Build a list of nodes to discover based on the loopmap */
2480 void
2481 lpfc_disc_list_loopmap(struct lpfc_vport *vport)
2482 {
2483         struct lpfc_hba  *phba = vport->phba;
2484         int j;
2485         uint32_t alpa, index;
2486
2487         if (!lpfc_is_link_up(phba))
2488                 return;
2489
2490         if (phba->fc_topology != TOPOLOGY_LOOP)
2491                 return;
2492
2493         /* Check for loop map present or not */
2494         if (phba->alpa_map[0]) {
2495                 for (j = 1; j <= phba->alpa_map[0]; j++) {
2496                         alpa = phba->alpa_map[j];
2497                         if (((vport->fc_myDID & 0xff) == alpa) || (alpa == 0))
2498                                 continue;
2499                         lpfc_setup_disc_node(vport, alpa);
2500                 }
2501         } else {
2502                 /* No alpamap, so try all alpa's */
2503                 for (j = 0; j < FC_MAXLOOP; j++) {
2504                         /* If cfg_scan_down is set, start from highest
2505                          * ALPA (0xef) to lowest (0x1).
2506                          */
2507                         if (vport->cfg_scan_down)
2508                                 index = j;
2509                         else
2510                                 index = FC_MAXLOOP - j - 1;
2511                         alpa = lpfcAlpaArray[index];
2512                         if ((vport->fc_myDID & 0xff) == alpa)
2513                                 continue;
2514                         lpfc_setup_disc_node(vport, alpa);
2515                 }
2516         }
2517         return;
2518 }
2519
2520 void
2521 lpfc_issue_clear_la(struct lpfc_hba *phba, struct lpfc_vport *vport)
2522 {
2523         LPFC_MBOXQ_t *mbox;
2524         struct lpfc_sli *psli = &phba->sli;
2525         struct lpfc_sli_ring *extra_ring = &psli->ring[psli->extra_ring];
2526         struct lpfc_sli_ring *fcp_ring   = &psli->ring[psli->fcp_ring];
2527         struct lpfc_sli_ring *next_ring  = &psli->ring[psli->next_ring];
2528         int  rc;
2529
2530         /*
2531          * if it's not a physical port or if we already send
2532          * clear_la then don't send it.
2533          */
2534         if ((phba->link_state >= LPFC_CLEAR_LA) ||
2535             (vport->port_type != LPFC_PHYSICAL_PORT))
2536                 return;
2537
2538                         /* Link up discovery */
2539         if ((mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL)) != NULL) {
2540                 phba->link_state = LPFC_CLEAR_LA;
2541                 lpfc_clear_la(phba, mbox);
2542                 mbox->mbox_cmpl = lpfc_mbx_cmpl_clear_la;
2543                 mbox->vport = vport;
2544                 rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
2545                 if (rc == MBX_NOT_FINISHED) {
2546                         mempool_free(mbox, phba->mbox_mem_pool);
2547                         lpfc_disc_flush_list(vport);
2548                         extra_ring->flag &= ~LPFC_STOP_IOCB_EVENT;
2549                         fcp_ring->flag &= ~LPFC_STOP_IOCB_EVENT;
2550                         next_ring->flag &= ~LPFC_STOP_IOCB_EVENT;
2551                         phba->link_state = LPFC_HBA_ERROR;
2552                 }
2553         }
2554 }
2555
2556 /* Reg_vpi to tell firmware to resume normal operations */
2557 void
2558 lpfc_issue_reg_vpi(struct lpfc_hba *phba, struct lpfc_vport *vport)
2559 {
2560         LPFC_MBOXQ_t *regvpimbox;
2561
2562         regvpimbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
2563         if (regvpimbox) {
2564                 lpfc_reg_vpi(phba, vport->vpi, vport->fc_myDID, regvpimbox);
2565                 regvpimbox->mbox_cmpl = lpfc_mbx_cmpl_reg_vpi;
2566                 regvpimbox->vport = vport;
2567                 if (lpfc_sli_issue_mbox(phba, regvpimbox, MBX_NOWAIT)
2568                                         == MBX_NOT_FINISHED) {
2569                         mempool_free(regvpimbox, phba->mbox_mem_pool);
2570                 }
2571         }
2572 }
2573
2574 /* Start Link up / RSCN discovery on NPR nodes */
2575 void
2576 lpfc_disc_start(struct lpfc_vport *vport)
2577 {
2578         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
2579         struct lpfc_hba  *phba = vport->phba;
2580         uint32_t num_sent;
2581         uint32_t clear_la_pending;
2582         int did_changed;
2583
2584         if (!lpfc_is_link_up(phba))
2585                 return;
2586
2587         if (phba->link_state == LPFC_CLEAR_LA)
2588                 clear_la_pending = 1;
2589         else
2590                 clear_la_pending = 0;
2591
2592         if (vport->port_state < LPFC_VPORT_READY)
2593                 vport->port_state = LPFC_DISC_AUTH;
2594
2595         lpfc_set_disctmo(vport);
2596
2597         if (vport->fc_prevDID == vport->fc_myDID)
2598                 did_changed = 0;
2599         else
2600                 did_changed = 1;
2601
2602         vport->fc_prevDID = vport->fc_myDID;
2603         vport->num_disc_nodes = 0;
2604
2605         /* Start Discovery state <hba_state> */
2606         lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
2607                          "0202 Start Discovery hba state x%x "
2608                          "Data: x%x x%x x%x\n",
2609                          vport->port_state, vport->fc_flag, vport->fc_plogi_cnt,
2610                          vport->fc_adisc_cnt);
2611
2612         /* First do ADISCs - if any */
2613         num_sent = lpfc_els_disc_adisc(vport);
2614
2615         if (num_sent)
2616                 return;
2617
2618         /*
2619          * For SLI3, cmpl_reg_vpi will set port_state to READY, and
2620          * continue discovery.
2621          */
2622         if ((phba->sli3_options & LPFC_SLI3_NPIV_ENABLED) &&
2623             !(vport->fc_flag & FC_PT2PT) &&
2624             !(vport->fc_flag & FC_RSCN_MODE)) {
2625                 lpfc_issue_reg_vpi(phba, vport);
2626                 return;
2627         }
2628
2629         /*
2630          * For SLI2, we need to set port_state to READY and continue
2631          * discovery.
2632          */
2633         if (vport->port_state < LPFC_VPORT_READY && !clear_la_pending) {
2634                 /* If we get here, there is nothing to ADISC */
2635                 if (vport->port_type == LPFC_PHYSICAL_PORT)
2636                         lpfc_issue_clear_la(phba, vport);
2637
2638                 if (!(vport->fc_flag & FC_ABORT_DISCOVERY)) {
2639                         vport->num_disc_nodes = 0;
2640                         /* go thru NPR nodes and issue ELS PLOGIs */
2641                         if (vport->fc_npr_cnt)
2642                                 lpfc_els_disc_plogi(vport);
2643
2644                         if (!vport->num_disc_nodes) {
2645                                 spin_lock_irq(shost->host_lock);
2646                                 vport->fc_flag &= ~FC_NDISC_ACTIVE;
2647                                 spin_unlock_irq(shost->host_lock);
2648                                 lpfc_can_disctmo(vport);
2649                         }
2650                 }
2651                 vport->port_state = LPFC_VPORT_READY;
2652         } else {
2653                 /* Next do PLOGIs - if any */
2654                 num_sent = lpfc_els_disc_plogi(vport);
2655
2656                 if (num_sent)
2657                         return;
2658
2659                 if (vport->fc_flag & FC_RSCN_MODE) {
2660                         /* Check to see if more RSCNs came in while we
2661                          * were processing this one.
2662                          */
2663                         if ((vport->fc_rscn_id_cnt == 0) &&
2664                             (!(vport->fc_flag & FC_RSCN_DISCOVERY))) {
2665                                 spin_lock_irq(shost->host_lock);
2666                                 vport->fc_flag &= ~FC_RSCN_MODE;
2667                                 spin_unlock_irq(shost->host_lock);
2668                                 lpfc_can_disctmo(vport);
2669                         } else
2670                                 lpfc_els_handle_rscn(vport);
2671                 }
2672         }
2673         return;
2674 }
2675
2676 /*
2677  *  Ignore completion for all IOCBs on tx and txcmpl queue for ELS
2678  *  ring the match the sppecified nodelist.
2679  */
2680 static void
2681 lpfc_free_tx(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
2682 {
2683         LIST_HEAD(completions);
2684         struct lpfc_sli *psli;
2685         IOCB_t     *icmd;
2686         struct lpfc_iocbq    *iocb, *next_iocb;
2687         struct lpfc_sli_ring *pring;
2688
2689         psli = &phba->sli;
2690         pring = &psli->ring[LPFC_ELS_RING];
2691
2692         /* Error matching iocb on txq or txcmplq
2693          * First check the txq.
2694          */
2695         spin_lock_irq(&phba->hbalock);
2696         list_for_each_entry_safe(iocb, next_iocb, &pring->txq, list) {
2697                 if (iocb->context1 != ndlp) {
2698                         continue;
2699                 }
2700                 icmd = &iocb->iocb;
2701                 if ((icmd->ulpCommand == CMD_ELS_REQUEST64_CR) ||
2702                     (icmd->ulpCommand == CMD_XMIT_ELS_RSP64_CX)) {
2703
2704                         list_move_tail(&iocb->list, &completions);
2705                         pring->txq_cnt--;
2706                 }
2707         }
2708
2709         /* Next check the txcmplq */
2710         list_for_each_entry_safe(iocb, next_iocb, &pring->txcmplq, list) {
2711                 if (iocb->context1 != ndlp) {
2712                         continue;
2713                 }
2714                 icmd = &iocb->iocb;
2715                 if (icmd->ulpCommand == CMD_ELS_REQUEST64_CR ||
2716                     icmd->ulpCommand == CMD_XMIT_ELS_RSP64_CX) {
2717                         lpfc_sli_issue_abort_iotag(phba, pring, iocb);
2718                 }
2719         }
2720         spin_unlock_irq(&phba->hbalock);
2721
2722         while (!list_empty(&completions)) {
2723                 iocb = list_get_first(&completions, struct lpfc_iocbq, list);
2724                 list_del_init(&iocb->list);
2725
2726                 if (!iocb->iocb_cmpl)
2727                         lpfc_sli_release_iocbq(phba, iocb);
2728                 else {
2729                         icmd = &iocb->iocb;
2730                         icmd->ulpStatus = IOSTAT_LOCAL_REJECT;
2731                         icmd->un.ulpWord[4] = IOERR_SLI_ABORTED;
2732                         (iocb->iocb_cmpl) (phba, iocb, iocb);
2733                 }
2734         }
2735 }
2736
2737 static void
2738 lpfc_disc_flush_list(struct lpfc_vport *vport)
2739 {
2740         struct lpfc_nodelist *ndlp, *next_ndlp;
2741         struct lpfc_hba *phba = vport->phba;
2742
2743         if (vport->fc_plogi_cnt || vport->fc_adisc_cnt) {
2744                 list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes,
2745                                          nlp_listp) {
2746                         if (!NLP_CHK_NODE_ACT(ndlp))
2747                                 continue;
2748                         if (ndlp->nlp_state == NLP_STE_PLOGI_ISSUE ||
2749                             ndlp->nlp_state == NLP_STE_ADISC_ISSUE) {
2750                                 lpfc_free_tx(phba, ndlp);
2751                         }
2752                 }
2753         }
2754 }
2755
2756 void
2757 lpfc_cleanup_discovery_resources(struct lpfc_vport *vport)
2758 {
2759         lpfc_els_flush_rscn(vport);
2760         lpfc_els_flush_cmd(vport);
2761         lpfc_disc_flush_list(vport);
2762 }
2763
2764 /*****************************************************************************/
2765 /*
2766  * NAME:     lpfc_disc_timeout
2767  *
2768  * FUNCTION: Fibre Channel driver discovery timeout routine.
2769  *
2770  * EXECUTION ENVIRONMENT: interrupt only
2771  *
2772  * CALLED FROM:
2773  *      Timer function
2774  *
2775  * RETURNS:
2776  *      none
2777  */
2778 /*****************************************************************************/
2779 void
2780 lpfc_disc_timeout(unsigned long ptr)
2781 {
2782         struct lpfc_vport *vport = (struct lpfc_vport *) ptr;
2783         struct lpfc_hba   *phba = vport->phba;
2784         uint32_t tmo_posted;
2785         unsigned long flags = 0;
2786
2787         if (unlikely(!phba))
2788                 return;
2789
2790         spin_lock_irqsave(&vport->work_port_lock, flags);
2791         tmo_posted = vport->work_port_events & WORKER_DISC_TMO;
2792         if (!tmo_posted)
2793                 vport->work_port_events |= WORKER_DISC_TMO;
2794         spin_unlock_irqrestore(&vport->work_port_lock, flags);
2795
2796         if (!tmo_posted)
2797                 lpfc_worker_wake_up(phba);
2798         return;
2799 }
2800
2801 static void
2802 lpfc_disc_timeout_handler(struct lpfc_vport *vport)
2803 {
2804         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
2805         struct lpfc_hba  *phba = vport->phba;
2806         struct lpfc_sli  *psli = &phba->sli;
2807         struct lpfc_nodelist *ndlp, *next_ndlp;
2808         LPFC_MBOXQ_t *initlinkmbox;
2809         int rc, clrlaerr = 0;
2810
2811         if (!(vport->fc_flag & FC_DISC_TMO))
2812                 return;
2813
2814         spin_lock_irq(shost->host_lock);
2815         vport->fc_flag &= ~FC_DISC_TMO;
2816         spin_unlock_irq(shost->host_lock);
2817
2818         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
2819                 "disc timeout:    state:x%x rtry:x%x flg:x%x",
2820                 vport->port_state, vport->fc_ns_retry, vport->fc_flag);
2821
2822         switch (vport->port_state) {
2823
2824         case LPFC_LOCAL_CFG_LINK:
2825         /* port_state is identically  LPFC_LOCAL_CFG_LINK while waiting for
2826          * FAN
2827          */
2828                                 /* FAN timeout */
2829                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_DISCOVERY,
2830                                  "0221 FAN timeout\n");
2831                 /* Start discovery by sending FLOGI, clean up old rpis */
2832                 list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes,
2833                                          nlp_listp) {
2834                         if (!NLP_CHK_NODE_ACT(ndlp))
2835                                 continue;
2836                         if (ndlp->nlp_state != NLP_STE_NPR_NODE)
2837                                 continue;
2838                         if (ndlp->nlp_type & NLP_FABRIC) {
2839                                 /* Clean up the ndlp on Fabric connections */
2840                                 lpfc_drop_node(vport, ndlp);
2841
2842                         } else if (!(ndlp->nlp_flag & NLP_NPR_ADISC)) {
2843                                 /* Fail outstanding IO now since device
2844                                  * is marked for PLOGI.
2845                                  */
2846                                 lpfc_unreg_rpi(vport, ndlp);
2847                         }
2848                 }
2849                 if (vport->port_state != LPFC_FLOGI) {
2850                         lpfc_initial_flogi(vport);
2851                         return;
2852                 }
2853                 break;
2854
2855         case LPFC_FDISC:
2856         case LPFC_FLOGI:
2857         /* port_state is identically LPFC_FLOGI while waiting for FLOGI cmpl */
2858                 /* Initial FLOGI timeout */
2859                 lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
2860                                  "0222 Initial %s timeout\n",
2861                                  vport->vpi ? "FDISC" : "FLOGI");
2862
2863                 /* Assume no Fabric and go on with discovery.
2864                  * Check for outstanding ELS FLOGI to abort.
2865                  */
2866
2867                 /* FLOGI failed, so just use loop map to make discovery list */
2868                 lpfc_disc_list_loopmap(vport);
2869
2870                 /* Start discovery */
2871                 lpfc_disc_start(vport);
2872                 break;
2873
2874         case LPFC_FABRIC_CFG_LINK:
2875         /* hba_state is identically LPFC_FABRIC_CFG_LINK while waiting for
2876            NameServer login */
2877                 lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
2878                                  "0223 Timeout while waiting for "
2879                                  "NameServer login\n");
2880                 /* Next look for NameServer ndlp */
2881                 ndlp = lpfc_findnode_did(vport, NameServer_DID);
2882                 if (ndlp && NLP_CHK_NODE_ACT(ndlp))
2883                         lpfc_els_abort(phba, ndlp);
2884
2885                 /* ReStart discovery */
2886                 goto restart_disc;
2887
2888         case LPFC_NS_QRY:
2889         /* Check for wait for NameServer Rsp timeout */
2890                 lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
2891                                  "0224 NameServer Query timeout "
2892                                  "Data: x%x x%x\n",
2893                                  vport->fc_ns_retry, LPFC_MAX_NS_RETRY);
2894
2895                 if (vport->fc_ns_retry < LPFC_MAX_NS_RETRY) {
2896                         /* Try it one more time */
2897                         vport->fc_ns_retry++;
2898                         rc = lpfc_ns_cmd(vport, SLI_CTNS_GID_FT,
2899                                          vport->fc_ns_retry, 0);
2900                         if (rc == 0)
2901                                 break;
2902                 }
2903                 vport->fc_ns_retry = 0;
2904
2905 restart_disc:
2906                 /*
2907                  * Discovery is over.
2908                  * set port_state to PORT_READY if SLI2.
2909                  * cmpl_reg_vpi will set port_state to READY for SLI3.
2910                  */
2911                 if (phba->sli3_options & LPFC_SLI3_NPIV_ENABLED)
2912                         lpfc_issue_reg_vpi(phba, vport);
2913                 else  { /* NPIV Not enabled */
2914                         lpfc_issue_clear_la(phba, vport);
2915                         vport->port_state = LPFC_VPORT_READY;
2916                 }
2917
2918                 /* Setup and issue mailbox INITIALIZE LINK command */
2919                 initlinkmbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
2920                 if (!initlinkmbox) {
2921                         lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
2922                                          "0206 Device Discovery "
2923                                          "completion error\n");
2924                         phba->link_state = LPFC_HBA_ERROR;
2925                         break;
2926                 }
2927
2928                 lpfc_linkdown(phba);
2929                 lpfc_init_link(phba, initlinkmbox, phba->cfg_topology,
2930                                phba->cfg_link_speed);
2931                 initlinkmbox->mb.un.varInitLnk.lipsr_AL_PA = 0;
2932                 initlinkmbox->vport = vport;
2933                 initlinkmbox->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
2934                 rc = lpfc_sli_issue_mbox(phba, initlinkmbox, MBX_NOWAIT);
2935                 lpfc_set_loopback_flag(phba);
2936                 if (rc == MBX_NOT_FINISHED)
2937                         mempool_free(initlinkmbox, phba->mbox_mem_pool);
2938
2939                 break;
2940
2941         case LPFC_DISC_AUTH:
2942         /* Node Authentication timeout */
2943                 lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
2944                                  "0227 Node Authentication timeout\n");
2945                 lpfc_disc_flush_list(vport);
2946
2947                 /*
2948                  * set port_state to PORT_READY if SLI2.
2949                  * cmpl_reg_vpi will set port_state to READY for SLI3.
2950                  */
2951                 if (phba->sli3_options & LPFC_SLI3_NPIV_ENABLED)
2952                         lpfc_issue_reg_vpi(phba, vport);
2953                 else {  /* NPIV Not enabled */
2954                         lpfc_issue_clear_la(phba, vport);
2955                         vport->port_state = LPFC_VPORT_READY;
2956                 }
2957                 break;
2958
2959         case LPFC_VPORT_READY:
2960                 if (vport->fc_flag & FC_RSCN_MODE) {
2961                         lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
2962                                          "0231 RSCN timeout Data: x%x "
2963                                          "x%x\n",
2964                                          vport->fc_ns_retry, LPFC_MAX_NS_RETRY);
2965
2966                         /* Cleanup any outstanding ELS commands */
2967                         lpfc_els_flush_cmd(vport);
2968
2969                         lpfc_els_flush_rscn(vport);
2970                         lpfc_disc_flush_list(vport);
2971                 }
2972                 break;
2973
2974         default:
2975                 lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
2976                                  "0273 Unexpected discovery timeout, "
2977                                  "vport State x%x\n", vport->port_state);
2978                 break;
2979         }
2980
2981         switch (phba->link_state) {
2982         case LPFC_CLEAR_LA:
2983                                 /* CLEAR LA timeout */
2984                 lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
2985                                  "0228 CLEAR LA timeout\n");
2986                 clrlaerr = 1;
2987                 break;
2988
2989         case LPFC_LINK_UP:
2990                 lpfc_issue_clear_la(phba, vport);
2991                 /* Drop thru */
2992         case LPFC_LINK_UNKNOWN:
2993         case LPFC_WARM_START:
2994         case LPFC_INIT_START:
2995         case LPFC_INIT_MBX_CMDS:
2996         case LPFC_LINK_DOWN:
2997         case LPFC_HBA_ERROR:
2998                 lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
2999                                  "0230 Unexpected timeout, hba link "
3000                                  "state x%x\n", phba->link_state);
3001                 clrlaerr = 1;
3002                 break;
3003
3004         case LPFC_HBA_READY:
3005                 break;
3006         }
3007
3008         if (clrlaerr) {
3009                 lpfc_disc_flush_list(vport);
3010                 psli->ring[(psli->extra_ring)].flag &= ~LPFC_STOP_IOCB_EVENT;
3011                 psli->ring[(psli->fcp_ring)].flag &= ~LPFC_STOP_IOCB_EVENT;
3012                 psli->ring[(psli->next_ring)].flag &= ~LPFC_STOP_IOCB_EVENT;
3013                 vport->port_state = LPFC_VPORT_READY;
3014         }
3015
3016         return;
3017 }
3018
3019 /*
3020  * This routine handles processing a NameServer REG_LOGIN mailbox
3021  * command upon completion. It is setup in the LPFC_MBOXQ
3022  * as the completion routine when the command is
3023  * handed off to the SLI layer.
3024  */
3025 void
3026 lpfc_mbx_cmpl_fdmi_reg_login(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
3027 {
3028         MAILBOX_t *mb = &pmb->mb;
3029         struct lpfc_dmabuf   *mp = (struct lpfc_dmabuf *) (pmb->context1);
3030         struct lpfc_nodelist *ndlp = (struct lpfc_nodelist *) pmb->context2;
3031         struct lpfc_vport    *vport = pmb->vport;
3032
3033         pmb->context1 = NULL;
3034
3035         ndlp->nlp_rpi = mb->un.varWords[0];
3036         ndlp->nlp_type |= NLP_FABRIC;
3037         lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
3038
3039         /*
3040          * Start issuing Fabric-Device Management Interface (FDMI) command to
3041          * 0xfffffa (FDMI well known port) or Delay issuing FDMI command if
3042          * fdmi-on=2 (supporting RPA/hostnmae)
3043          */
3044
3045         if (vport->cfg_fdmi_on == 1)
3046                 lpfc_fdmi_cmd(vport, ndlp, SLI_MGMT_DHBA);
3047         else
3048                 mod_timer(&vport->fc_fdmitmo, jiffies + HZ * 60);
3049
3050         /* decrement the node reference count held for this callback
3051          * function.
3052          */
3053         lpfc_nlp_put(ndlp);
3054         lpfc_mbuf_free(phba, mp->virt, mp->phys);
3055         kfree(mp);
3056         mempool_free(pmb, phba->mbox_mem_pool);
3057
3058         return;
3059 }
3060
3061 static int
3062 lpfc_filter_by_rpi(struct lpfc_nodelist *ndlp, void *param)
3063 {
3064         uint16_t *rpi = param;
3065
3066         return ndlp->nlp_rpi == *rpi;
3067 }
3068
3069 static int
3070 lpfc_filter_by_wwpn(struct lpfc_nodelist *ndlp, void *param)
3071 {
3072         return memcmp(&ndlp->nlp_portname, param,
3073                       sizeof(ndlp->nlp_portname)) == 0;
3074 }
3075
3076 static struct lpfc_nodelist *
3077 __lpfc_find_node(struct lpfc_vport *vport, node_filter filter, void *param)
3078 {
3079         struct lpfc_nodelist *ndlp;
3080
3081         list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
3082                 if (filter(ndlp, param))
3083                         return ndlp;
3084         }
3085         return NULL;
3086 }
3087
3088 /*
3089  * This routine looks up the ndlp lists for the given RPI. If rpi found it
3090  * returns the node list element pointer else return NULL.
3091  */
3092 struct lpfc_nodelist *
3093 __lpfc_findnode_rpi(struct lpfc_vport *vport, uint16_t rpi)
3094 {
3095         return __lpfc_find_node(vport, lpfc_filter_by_rpi, &rpi);
3096 }
3097
3098 /*
3099  * This routine looks up the ndlp lists for the given WWPN. If WWPN found it
3100  * returns the node element list pointer else return NULL.
3101  */
3102 struct lpfc_nodelist *
3103 lpfc_findnode_wwpn(struct lpfc_vport *vport, struct lpfc_name *wwpn)
3104 {
3105         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
3106         struct lpfc_nodelist *ndlp;
3107
3108         spin_lock_irq(shost->host_lock);
3109         ndlp = __lpfc_find_node(vport, lpfc_filter_by_wwpn, wwpn);
3110         spin_unlock_irq(shost->host_lock);
3111         return ndlp;
3112 }
3113
3114 void
3115 lpfc_nlp_init(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
3116               uint32_t did)
3117 {
3118         memset(ndlp, 0, sizeof (struct lpfc_nodelist));
3119         INIT_LIST_HEAD(&ndlp->els_retry_evt.evt_listp);
3120         INIT_LIST_HEAD(&ndlp->dev_loss_evt.evt_listp);
3121         init_timer(&ndlp->nlp_delayfunc);
3122         ndlp->nlp_delayfunc.function = lpfc_els_retry_delay;
3123         ndlp->nlp_delayfunc.data = (unsigned long)ndlp;
3124         ndlp->nlp_DID = did;
3125         ndlp->vport = vport;
3126         ndlp->nlp_sid = NLP_NO_SID;
3127         INIT_LIST_HEAD(&ndlp->nlp_listp);
3128         kref_init(&ndlp->kref);
3129         NLP_INT_NODE_ACT(ndlp);
3130         atomic_set(&ndlp->cmd_pending, 0);
3131         ndlp->cmd_qdepth = LPFC_MAX_TGT_QDEPTH;
3132
3133         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_NODE,
3134                 "node init:       did:x%x",
3135                 ndlp->nlp_DID, 0, 0);
3136
3137         return;
3138 }
3139
3140 /* This routine releases all resources associated with a specifc NPort's ndlp
3141  * and mempool_free's the nodelist.
3142  */
3143 static void
3144 lpfc_nlp_release(struct kref *kref)
3145 {
3146         struct lpfc_hba *phba;
3147         unsigned long flags;
3148         struct lpfc_nodelist *ndlp = container_of(kref, struct lpfc_nodelist,
3149                                                   kref);
3150
3151         lpfc_debugfs_disc_trc(ndlp->vport, LPFC_DISC_TRC_NODE,
3152                 "node release:    did:x%x flg:x%x type:x%x",
3153                 ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_type);
3154
3155         lpfc_printf_vlog(ndlp->vport, KERN_INFO, LOG_NODE,
3156                         "0279 lpfc_nlp_release: ndlp:x%p "
3157                         "usgmap:x%x refcnt:%d\n",
3158                         (void *)ndlp, ndlp->nlp_usg_map,
3159                         atomic_read(&ndlp->kref.refcount));
3160
3161         /* remove ndlp from action. */
3162         lpfc_nlp_remove(ndlp->vport, ndlp);
3163
3164         /* clear the ndlp active flag for all release cases */
3165         phba = ndlp->vport->phba;
3166         spin_lock_irqsave(&phba->ndlp_lock, flags);
3167         NLP_CLR_NODE_ACT(ndlp);
3168         spin_unlock_irqrestore(&phba->ndlp_lock, flags);
3169
3170         /* free ndlp memory for final ndlp release */
3171         if (NLP_CHK_FREE_REQ(ndlp)) {
3172                 kfree(ndlp->lat_data);
3173                 mempool_free(ndlp, ndlp->vport->phba->nlp_mem_pool);
3174         }
3175 }
3176
3177 /* This routine bumps the reference count for a ndlp structure to ensure
3178  * that one discovery thread won't free a ndlp while another discovery thread
3179  * is using it.
3180  */
3181 struct lpfc_nodelist *
3182 lpfc_nlp_get(struct lpfc_nodelist *ndlp)
3183 {
3184         struct lpfc_hba *phba;
3185         unsigned long flags;
3186
3187         if (ndlp) {
3188                 lpfc_debugfs_disc_trc(ndlp->vport, LPFC_DISC_TRC_NODE,
3189                         "node get:        did:x%x flg:x%x refcnt:x%x",
3190                         ndlp->nlp_DID, ndlp->nlp_flag,
3191                         atomic_read(&ndlp->kref.refcount));
3192                 /* The check of ndlp usage to prevent incrementing the
3193                  * ndlp reference count that is in the process of being
3194                  * released.
3195                  */
3196                 phba = ndlp->vport->phba;
3197                 spin_lock_irqsave(&phba->ndlp_lock, flags);
3198                 if (!NLP_CHK_NODE_ACT(ndlp) || NLP_CHK_FREE_ACK(ndlp)) {
3199                         spin_unlock_irqrestore(&phba->ndlp_lock, flags);
3200                         lpfc_printf_vlog(ndlp->vport, KERN_WARNING, LOG_NODE,
3201                                 "0276 lpfc_nlp_get: ndlp:x%p "
3202                                 "usgmap:x%x refcnt:%d\n",
3203                                 (void *)ndlp, ndlp->nlp_usg_map,
3204                                 atomic_read(&ndlp->kref.refcount));
3205                         return NULL;
3206                 } else
3207                         kref_get(&ndlp->kref);
3208                 spin_unlock_irqrestore(&phba->ndlp_lock, flags);
3209         }
3210         return ndlp;
3211 }
3212
3213 /* This routine decrements the reference count for a ndlp structure. If the
3214  * count goes to 0, this indicates the the associated nodelist should be
3215  * freed. Returning 1 indicates the ndlp resource has been released; on the
3216  * other hand, returning 0 indicates the ndlp resource has not been released
3217  * yet.
3218  */
3219 int
3220 lpfc_nlp_put(struct lpfc_nodelist *ndlp)
3221 {
3222         struct lpfc_hba *phba;
3223         unsigned long flags;
3224
3225         if (!ndlp)
3226                 return 1;
3227
3228         lpfc_debugfs_disc_trc(ndlp->vport, LPFC_DISC_TRC_NODE,
3229         "node put:        did:x%x flg:x%x refcnt:x%x",
3230                 ndlp->nlp_DID, ndlp->nlp_flag,
3231                 atomic_read(&ndlp->kref.refcount));
3232         phba = ndlp->vport->phba;
3233         spin_lock_irqsave(&phba->ndlp_lock, flags);
3234         /* Check the ndlp memory free acknowledge flag to avoid the
3235          * possible race condition that kref_put got invoked again
3236          * after previous one has done ndlp memory free.
3237          */
3238         if (NLP_CHK_FREE_ACK(ndlp)) {
3239                 spin_unlock_irqrestore(&phba->ndlp_lock, flags);
3240                 lpfc_printf_vlog(ndlp->vport, KERN_WARNING, LOG_NODE,
3241                                 "0274 lpfc_nlp_put: ndlp:x%p "
3242                                 "usgmap:x%x refcnt:%d\n",
3243                                 (void *)ndlp, ndlp->nlp_usg_map,
3244                                 atomic_read(&ndlp->kref.refcount));
3245                 return 1;
3246         }
3247         /* Check the ndlp inactivate log flag to avoid the possible
3248          * race condition that kref_put got invoked again after ndlp
3249          * is already in inactivating state.
3250          */
3251         if (NLP_CHK_IACT_REQ(ndlp)) {
3252                 spin_unlock_irqrestore(&phba->ndlp_lock, flags);
3253                 lpfc_printf_vlog(ndlp->vport, KERN_WARNING, LOG_NODE,
3254                                 "0275 lpfc_nlp_put: ndlp:x%p "
3255                                 "usgmap:x%x refcnt:%d\n",
3256                                 (void *)ndlp, ndlp->nlp_usg_map,
3257                                 atomic_read(&ndlp->kref.refcount));
3258                 return 1;
3259         }
3260         /* For last put, mark the ndlp usage flags to make sure no
3261          * other kref_get and kref_put on the same ndlp shall get
3262          * in between the process when the final kref_put has been
3263          * invoked on this ndlp.
3264          */
3265         if (atomic_read(&ndlp->kref.refcount) == 1) {
3266                 /* Indicate ndlp is put to inactive state. */
3267                 NLP_SET_IACT_REQ(ndlp);
3268                 /* Acknowledge ndlp memory free has been seen. */
3269                 if (NLP_CHK_FREE_REQ(ndlp))
3270                         NLP_SET_FREE_ACK(ndlp);
3271         }
3272         spin_unlock_irqrestore(&phba->ndlp_lock, flags);
3273         /* Note, the kref_put returns 1 when decrementing a reference
3274          * count that was 1, it invokes the release callback function,
3275          * but it still left the reference count as 1 (not actually
3276          * performs the last decrementation). Otherwise, it actually
3277          * decrements the reference count and returns 0.
3278          */
3279         return kref_put(&ndlp->kref, lpfc_nlp_release);
3280 }
3281
3282 /* This routine free's the specified nodelist if it is not in use
3283  * by any other discovery thread. This routine returns 1 if the
3284  * ndlp has been freed. A return value of 0 indicates the ndlp is
3285  * not yet been released.
3286  */
3287 int
3288 lpfc_nlp_not_used(struct lpfc_nodelist *ndlp)
3289 {
3290         lpfc_debugfs_disc_trc(ndlp->vport, LPFC_DISC_TRC_NODE,
3291                 "node not used:   did:x%x flg:x%x refcnt:x%x",
3292                 ndlp->nlp_DID, ndlp->nlp_flag,
3293                 atomic_read(&ndlp->kref.refcount));
3294         if (atomic_read(&ndlp->kref.refcount) == 1)
3295                 if (lpfc_nlp_put(ndlp))
3296                         return 1;
3297         return 0;
3298 }