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->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 == LPFC_EVENT_PORT_BUSY)) {
 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                 LPFC_NL_VENDOR_ID);
 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 (!kthread_should_stop()) {
 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                 /* Signal wakeup shall terminate the worker thread */
 595                 if (rc) {
 596                         lpfc_printf_log(phba, KERN_ERR, LOG_ELS,
 597                                         "0433 Wakeup on signal: rc=x%x\n", rc);
 598                         break;
 599                 }
 600
 601                 /* Attend pending lpfc data processing */
 602                 lpfc_work_done(phba);
 603         }
 604         phba->worker_thread = NULL;
 605         lpfc_printf_log(phba, KERN_INFO, LOG_ELS,
 606                         "0432 Worker thread stopped.\n");
 607         return 0;
 608 }
 609
 610 /*
 611  * This is only called to handle FC worker events. Since this a rare
 612  * occurance, we allocate a struct lpfc_work_evt structure here instead of
 613  * embedding it in the IOCB.
 614  */
 615 int
 616 lpfc_workq_post_event(struct lpfc_hba *phba, void *arg1, void *arg2,
 617                       uint32_t evt)
 618 {
 619         struct lpfc_work_evt  *evtp;
 620         unsigned long flags;
 621
 622         /*
 623          * All Mailbox completions and LPFC_ELS_RING rcv ring IOCB events will
 624          * be queued to worker thread for processing
 625          */
 626         evtp = kmalloc(sizeof(struct lpfc_work_evt), GFP_ATOMIC);
 627         if (!evtp)
 628                 return 0;
 629
 630         evtp->evt_arg1  = arg1;
 631         evtp->evt_arg2  = arg2;
 632         evtp->evt       = evt;
 633
 634         spin_lock_irqsave(&phba->hbalock, flags);
 635         list_add_tail(&evtp->evt_listp, &phba->work_list);
 636         spin_unlock_irqrestore(&phba->hbalock, flags);
 637
 638         lpfc_worker_wake_up(phba);
 639
 640         return 1;
 641 }
 642
 643 void
 644 lpfc_cleanup_rpis(struct lpfc_vport *vport, int remove)
 645 {
 646         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
 647         struct lpfc_hba  *phba = vport->phba;
 648         struct lpfc_nodelist *ndlp, *next_ndlp;
 649         int  rc;
 650
 651         list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) {
 652                 if (!NLP_CHK_NODE_ACT(ndlp))
 653                         continue;
 654                 if (ndlp->nlp_state == NLP_STE_UNUSED_NODE)
 655                         continue;
 656                 if ((phba->sli3_options & LPFC_SLI3_VPORT_TEARDOWN) ||
 657                         ((vport->port_type == LPFC_NPIV_PORT) &&
 658                         (ndlp->nlp_DID == NameServer_DID)))
 659                         lpfc_unreg_rpi(vport, ndlp);
 660
 661                 /* Leave Fabric nodes alone on link down */
 662                 if (!remove && ndlp->nlp_type & NLP_FABRIC)
 663                         continue;
 664                 rc = lpfc_disc_state_machine(vport, ndlp, NULL,
 665                                              remove
 666                                              ? NLP_EVT_DEVICE_RM
 667                                              : NLP_EVT_DEVICE_RECOVERY);
 668         }
 669         if (phba->sli3_options & LPFC_SLI3_VPORT_TEARDOWN) {
 670                 lpfc_mbx_unreg_vpi(vport);
 671                 spin_lock_irq(shost->host_lock);
 672                 vport->fc_flag |= FC_VPORT_NEEDS_REG_VPI;
 673                 spin_unlock_irq(shost->host_lock);
 674         }
 675 }
 676
 677 void
 678 lpfc_port_link_failure(struct lpfc_vport *vport)
 679 {
 680         /* Cleanup any outstanding RSCN activity */
 681         lpfc_els_flush_rscn(vport);
 682
 683         /* Cleanup any outstanding ELS commands */
 684         lpfc_els_flush_cmd(vport);
 685
 686         lpfc_cleanup_rpis(vport, 0);
 687
 688         /* Turn off discovery timer if its running */
 689         lpfc_can_disctmo(vport);
 690 }
 691
 692 static void
 693 lpfc_linkdown_port(struct lpfc_vport *vport)
 694 {
 695         struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
 696
 697         fc_host_post_event(shost, fc_get_event_number(), FCH_EVT_LINKDOWN, 0);
 698
 699         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
 700                 "Link Down:       state:x%x rtry:x%x flg:x%x",
 701                 vport->port_state, vport->fc_ns_retry, vport->fc_flag);
 702
 703         lpfc_port_link_failure(vport);
 704
 705 }
 706
 707 int
 708 lpfc_linkdown(struct lpfc_hba *phba)
 709 {
 710         struct lpfc_vport *vport = phba->pport;
 711         struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
 712         struct lpfc_vport **vports;
 713         LPFC_MBOXQ_t          *mb;
 714         int i;
 715
 716         if (phba->link_state == LPFC_LINK_DOWN)
 717                 return 0;
 718         spin_lock_irq(&phba->hbalock);
 719         if (phba->link_state > LPFC_LINK_DOWN) {
 720                 phba->link_state = LPFC_LINK_DOWN;
 721                 phba->pport->fc_flag &= ~FC_LBIT;
 722         }
 723         spin_unlock_irq(&phba->hbalock);
 724         vports = lpfc_create_vport_work_array(phba);
 725         if (vports != NULL)
 726                 for(i = 0; i <= phba->max_vpi && vports[i] != NULL; i++) {
 727                         /* Issue a LINK DOWN event to all nodes */
 728                         lpfc_linkdown_port(vports[i]);
 729                 }
 730         lpfc_destroy_vport_work_array(phba, vports);
 731         /* Clean up any firmware default rpi's */
 732         mb = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
 733         if (mb) {
 734                 lpfc_unreg_did(phba, 0xffff, 0xffffffff, mb);
 735                 mb->vport = vport;
 736                 mb->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
 737                 if (lpfc_sli_issue_mbox(phba, mb, MBX_NOWAIT)
 738                     == MBX_NOT_FINISHED) {
 739                         mempool_free(mb, phba->mbox_mem_pool);
 740                 }
 741         }
 742
 743         /* Setup myDID for link up if we are in pt2pt mode */
 744         if (phba->pport->fc_flag & FC_PT2PT) {
 745                 phba->pport->fc_myDID = 0;
 746                 mb = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
 747                 if (mb) {
 748                         lpfc_config_link(phba, mb);
 749                         mb->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
 750                         mb->vport = vport;
 751                         if (lpfc_sli_issue_mbox(phba, mb, MBX_NOWAIT)
 752                             == MBX_NOT_FINISHED) {
 753                                 mempool_free(mb, phba->mbox_mem_pool);
 754                         }
 755                 }
 756                 spin_lock_irq(shost->host_lock);
 757                 phba->pport->fc_flag &= ~(FC_PT2PT | FC_PT2PT_PLOGI);
 758                 spin_unlock_irq(shost->host_lock);
 759         }
 760
 761         return 0;
 762 }
 763
 764 static void
 765 lpfc_linkup_cleanup_nodes(struct lpfc_vport *vport)
 766 {
 767         struct lpfc_nodelist *ndlp;
 768
 769         list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
 770                 if (!NLP_CHK_NODE_ACT(ndlp))
 771                         continue;
 772                 if (ndlp->nlp_state == NLP_STE_UNUSED_NODE)
 773                         continue;
 774                 if (ndlp->nlp_type & NLP_FABRIC) {
 775                         /* On Linkup its safe to clean up the ndlp
 776                          * from Fabric connections.
 777                          */
 778                         if (ndlp->nlp_DID != Fabric_DID)
 779                                 lpfc_unreg_rpi(vport, ndlp);
 780                         lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
 781                 } else if (!(ndlp->nlp_flag & NLP_NPR_ADISC)) {
 782                         /* Fail outstanding IO now since device is
 783                          * marked for PLOGI.
 784                          */
 785                         lpfc_unreg_rpi(vport, ndlp);
 786                 }
 787         }
 788 }
 789
 790 static void
 791 lpfc_linkup_port(struct lpfc_vport *vport)
 792 {
 793         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
 794         struct lpfc_hba  *phba = vport->phba;
 795
 796         if ((vport->load_flag & FC_UNLOADING) != 0)
 797                 return;
 798
 799         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
 800                 "Link Up:         top:x%x speed:x%x flg:x%x",
 801                 phba->fc_topology, phba->fc_linkspeed, phba->link_flag);
 802
 803         /* If NPIV is not enabled, only bring the physical port up */
 804         if (!(phba->sli3_options & LPFC_SLI3_NPIV_ENABLED) &&
 805                 (vport != phba->pport))
 806                 return;
 807
 808         fc_host_post_event(shost, fc_get_event_number(), FCH_EVT_LINKUP, 0);
 809
 810         spin_lock_irq(shost->host_lock);
 811         vport->fc_flag &= ~(FC_PT2PT | FC_PT2PT_PLOGI | FC_ABORT_DISCOVERY |
 812                             FC_RSCN_MODE | FC_NLP_MORE | FC_RSCN_DISCOVERY);
 813         vport->fc_flag |= FC_NDISC_ACTIVE;
 814         vport->fc_ns_retry = 0;
 815         spin_unlock_irq(shost->host_lock);
 816
 817         if (vport->fc_flag & FC_LBIT)
 818                 lpfc_linkup_cleanup_nodes(vport);
 819
 820 }
 821
 822 static int
 823 lpfc_linkup(struct lpfc_hba *phba)
 824 {
 825         struct lpfc_vport **vports;
 826         int i;
 827
 828         phba->link_state = LPFC_LINK_UP;
 829
 830         /* Unblock fabric iocbs if they are blocked */
 831         clear_bit(FABRIC_COMANDS_BLOCKED, &phba->bit_flags);
 832         del_timer_sync(&phba->fabric_block_timer);
 833
 834         vports = lpfc_create_vport_work_array(phba);
 835         if (vports != NULL)
 836                 for(i = 0; i <= phba->max_vpi && vports[i] != NULL; i++)
 837                         lpfc_linkup_port(vports[i]);
 838         lpfc_destroy_vport_work_array(phba, vports);
 839         if (phba->sli3_options & LPFC_SLI3_NPIV_ENABLED)
 840                 lpfc_issue_clear_la(phba, phba->pport);
 841
 842         return 0;
 843 }
 844
 845 /*
 846  * This routine handles processing a CLEAR_LA mailbox
 847  * command upon completion. It is setup in the LPFC_MBOXQ
 848  * as the completion routine when the command is
 849  * handed off to the SLI layer.
 850  */
 851 static void
 852 lpfc_mbx_cmpl_clear_la(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
 853 {
 854         struct lpfc_vport *vport = pmb->vport;
 855         struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
 856         struct lpfc_sli   *psli = &phba->sli;
 857         MAILBOX_t *mb = &pmb->mb;
 858         uint32_t control;
 859
 860         /* Since we don't do discovery right now, turn these off here */
 861         psli->ring[psli->extra_ring].flag &= ~LPFC_STOP_IOCB_EVENT;
 862         psli->ring[psli->fcp_ring].flag &= ~LPFC_STOP_IOCB_EVENT;
 863         psli->ring[psli->next_ring].flag &= ~LPFC_STOP_IOCB_EVENT;
 864
 865         /* Check for error */
 866         if ((mb->mbxStatus) && (mb->mbxStatus != 0x1601)) {
 867                 /* CLEAR_LA mbox error <mbxStatus> state <hba_state> */
 868                 lpfc_printf_vlog(vport, KERN_ERR, LOG_MBOX,
 869                                  "0320 CLEAR_LA mbxStatus error x%x hba "
 870                                  "state x%x\n",
 871                                  mb->mbxStatus, vport->port_state);
 872                 phba->link_state = LPFC_HBA_ERROR;
 873                 goto out;
 874         }
 875
 876         if (vport->port_type == LPFC_PHYSICAL_PORT)
 877                 phba->link_state = LPFC_HBA_READY;
 878
 879         spin_lock_irq(&phba->hbalock);
 880         psli->sli_flag |= LPFC_PROCESS_LA;
 881         control = readl(phba->HCregaddr);
 882         control |= HC_LAINT_ENA;
 883         writel(control, phba->HCregaddr);
 884         readl(phba->HCregaddr); /* flush */
 885         spin_unlock_irq(&phba->hbalock);
 886         mempool_free(pmb, phba->mbox_mem_pool);
 887         return;
 888
 889 out:
 890         /* Device Discovery completes */
 891         lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
 892                          "0225 Device Discovery completes\n");
 893         mempool_free(pmb, phba->mbox_mem_pool);
 894
 895         spin_lock_irq(shost->host_lock);
 896         vport->fc_flag &= ~FC_ABORT_DISCOVERY;
 897         spin_unlock_irq(shost->host_lock);
 898
 899         lpfc_can_disctmo(vport);
 900
 901         /* turn on Link Attention interrupts */
 902
 903         spin_lock_irq(&phba->hbalock);
 904         psli->sli_flag |= LPFC_PROCESS_LA;
 905         control = readl(phba->HCregaddr);
 906         control |= HC_LAINT_ENA;
 907         writel(control, phba->HCregaddr);
 908         readl(phba->HCregaddr); /* flush */
 909         spin_unlock_irq(&phba->hbalock);
 910
 911         return;
 912 }
 913
 914
 915 static void
 916 lpfc_mbx_cmpl_local_config_link(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
 917 {
 918         struct lpfc_vport *vport = pmb->vport;
 919
 920         if (pmb->mb.mbxStatus)
 921                 goto out;
 922
 923         mempool_free(pmb, phba->mbox_mem_pool);
 924
 925         if (phba->fc_topology == TOPOLOGY_LOOP &&
 926             vport->fc_flag & FC_PUBLIC_LOOP &&
 927             !(vport->fc_flag & FC_LBIT)) {
 928                         /* Need to wait for FAN - use discovery timer
 929                          * for timeout.  port_state is identically
 930                          * LPFC_LOCAL_CFG_LINK while waiting for FAN
 931                          */
 932                         lpfc_set_disctmo(vport);
 933                         return;
 934         }
 935
 936         /* Start discovery by sending a FLOGI. port_state is identically
 937          * LPFC_FLOGI while waiting for FLOGI cmpl
 938          */
 939         if (vport->port_state != LPFC_FLOGI) {
 940                 lpfc_initial_flogi(vport);
 941         }
 942         return;
 943
 944 out:
 945         lpfc_printf_vlog(vport, KERN_ERR, LOG_MBOX,
 946                          "0306 CONFIG_LINK mbxStatus error x%x "
 947                          "HBA state x%x\n",
 948                          pmb->mb.mbxStatus, vport->port_state);
 949         mempool_free(pmb, phba->mbox_mem_pool);
 950
 951         lpfc_linkdown(phba);
 952
 953         lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
 954                          "0200 CONFIG_LINK bad hba state x%x\n",
 955                          vport->port_state);
 956
 957         lpfc_issue_clear_la(phba, vport);
 958         return;
 959 }
 960
 961 static void
 962 lpfc_mbx_cmpl_read_sparam(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
 963 {
 964         MAILBOX_t *mb = &pmb->mb;
 965         struct lpfc_dmabuf *mp = (struct lpfc_dmabuf *) pmb->context1;
 966         struct lpfc_vport  *vport = pmb->vport;
 967
 968
 969         /* Check for error */
 970         if (mb->mbxStatus) {
 971                 /* READ_SPARAM mbox error <mbxStatus> state <hba_state> */
 972                 lpfc_printf_vlog(vport, KERN_ERR, LOG_MBOX,
 973                                  "0319 READ_SPARAM mbxStatus error x%x "
 974                                  "hba state x%x>\n",
 975                                  mb->mbxStatus, vport->port_state);
 976                 lpfc_linkdown(phba);
 977                 goto out;
 978         }
 979
 980         memcpy((uint8_t *) &vport->fc_sparam, (uint8_t *) mp->virt,
 981                sizeof (struct serv_parm));
 982         if (phba->cfg_soft_wwnn)
 983                 u64_to_wwn(phba->cfg_soft_wwnn,
 984                            vport->fc_sparam.nodeName.u.wwn);
 985         if (phba->cfg_soft_wwpn)
 986                 u64_to_wwn(phba->cfg_soft_wwpn,
 987                            vport->fc_sparam.portName.u.wwn);
 988         memcpy(&vport->fc_nodename, &vport->fc_sparam.nodeName,
 989                sizeof(vport->fc_nodename));
 990         memcpy(&vport->fc_portname, &vport->fc_sparam.portName,
 991                sizeof(vport->fc_portname));
 992         if (vport->port_type == LPFC_PHYSICAL_PORT) {
 993                 memcpy(&phba->wwnn, &vport->fc_nodename, sizeof(phba->wwnn));
 994                 memcpy(&phba->wwpn, &vport->fc_portname, sizeof(phba->wwnn));
 995         }
 996
 997         lpfc_mbuf_free(phba, mp->virt, mp->phys);
 998         kfree(mp);
 999         mempool_free(pmb, phba->mbox_mem_pool);
1000         return;
1001
1002 out:
1003         pmb->context1 = NULL;
1004         lpfc_mbuf_free(phba, mp->virt, mp->phys);
1005         kfree(mp);
1006         lpfc_issue_clear_la(phba, vport);
1007         mempool_free(pmb, phba->mbox_mem_pool);
1008         return;
1009 }
1010
1011 static void
1012 lpfc_mbx_process_link_up(struct lpfc_hba *phba, READ_LA_VAR *la)
1013 {
1014         struct lpfc_vport *vport = phba->pport;
1015         LPFC_MBOXQ_t *sparam_mbox, *cfglink_mbox;
1016         int i;
1017         struct lpfc_dmabuf *mp;
1018         int rc;
1019
1020         sparam_mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
1021         cfglink_mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
1022
1023         spin_lock_irq(&phba->hbalock);
1024         switch (la->UlnkSpeed) {
1025         case LA_1GHZ_LINK:
1026                 phba->fc_linkspeed = LA_1GHZ_LINK;
1027                 break;
1028         case LA_2GHZ_LINK:
1029                 phba->fc_linkspeed = LA_2GHZ_LINK;
1030                 break;
1031         case LA_4GHZ_LINK:
1032                 phba->fc_linkspeed = LA_4GHZ_LINK;
1033                 break;
1034         case LA_8GHZ_LINK:
1035                 phba->fc_linkspeed = LA_8GHZ_LINK;
1036                 break;
1037         default:
1038                 phba->fc_linkspeed = LA_UNKNW_LINK;
1039                 break;
1040         }
1041
1042         phba->fc_topology = la->topology;
1043         phba->link_flag &= ~LS_NPIV_FAB_SUPPORTED;
1044
1045         if (phba->fc_topology == TOPOLOGY_LOOP) {
1046                 phba->sli3_options &= ~LPFC_SLI3_NPIV_ENABLED;
1047
1048                 if (phba->cfg_enable_npiv)
1049                         lpfc_printf_log(phba, KERN_ERR, LOG_LINK_EVENT,
1050                                 "1309 Link Up Event npiv not supported in loop "
1051                                 "topology\n");
1052                                 /* Get Loop Map information */
1053                 if (la->il)
1054                         vport->fc_flag |= FC_LBIT;
1055
1056                 vport->fc_myDID = la->granted_AL_PA;
1057                 i = la->un.lilpBde64.tus.f.bdeSize;
1058
1059                 if (i == 0) {
1060                         phba->alpa_map[0] = 0;
1061                 } else {
1062                         if (vport->cfg_log_verbose & LOG_LINK_EVENT) {
1063                                 int numalpa, j, k;
1064                                 union {
1065                                         uint8_t pamap[16];
1066                                         struct {
1067                                                 uint32_t wd1;
1068                                                 uint32_t wd2;
1069                                                 uint32_t wd3;
1070                                                 uint32_t wd4;
1071                                         } pa;
1072                                 } un;
1073                                 numalpa = phba->alpa_map[0];
1074                                 j = 0;
1075                                 while (j < numalpa) {
1076                                         memset(un.pamap, 0, 16);
1077                                         for (k = 1; j < numalpa; k++) {
1078                                                 un.pamap[k - 1] =
1079                                                         phba->alpa_map[j + 1];
1080                                                 j++;
1081                                                 if (k == 16)
1082                                                         break;
1083                                         }
1084                                         /* Link Up Event ALPA map */
1085                                         lpfc_printf_log(phba,
1086                                                         KERN_WARNING,
1087                                                         LOG_LINK_EVENT,
1088                                                         "1304 Link Up Event "
1089                                                         "ALPA map Data: x%x "
1090                                                         "x%x x%x x%x\n",
1091                                                         un.pa.wd1, un.pa.wd2,
1092                                                         un.pa.wd3, un.pa.wd4);
1093                                 }
1094                         }
1095                 }
1096         } else {
1097                 if (!(phba->sli3_options & LPFC_SLI3_NPIV_ENABLED)) {
1098                         if (phba->max_vpi && phba->cfg_enable_npiv &&
1099                            (phba->sli_rev == 3))
1100                                 phba->sli3_options |= LPFC_SLI3_NPIV_ENABLED;
1101                 }
1102                 vport->fc_myDID = phba->fc_pref_DID;
1103                 vport->fc_flag |= FC_LBIT;
1104         }
1105         spin_unlock_irq(&phba->hbalock);
1106
1107         lpfc_linkup(phba);
1108         if (sparam_mbox) {
1109                 lpfc_read_sparam(phba, sparam_mbox, 0);
1110                 sparam_mbox->vport = vport;
1111                 sparam_mbox->mbox_cmpl = lpfc_mbx_cmpl_read_sparam;
1112                 rc = lpfc_sli_issue_mbox(phba, sparam_mbox, MBX_NOWAIT);
1113                 if (rc == MBX_NOT_FINISHED) {
1114                         mp = (struct lpfc_dmabuf *) sparam_mbox->context1;
1115                         lpfc_mbuf_free(phba, mp->virt, mp->phys);
1116                         kfree(mp);
1117                         mempool_free(sparam_mbox, phba->mbox_mem_pool);
1118                         if (cfglink_mbox)
1119                                 mempool_free(cfglink_mbox, phba->mbox_mem_pool);
1120                         goto out;
1121                 }
1122         }
1123
1124         if (cfglink_mbox) {
1125                 vport->port_state = LPFC_LOCAL_CFG_LINK;
1126                 lpfc_config_link(phba, cfglink_mbox);
1127                 cfglink_mbox->vport = vport;
1128                 cfglink_mbox->mbox_cmpl = lpfc_mbx_cmpl_local_config_link;
1129                 rc = lpfc_sli_issue_mbox(phba, cfglink_mbox, MBX_NOWAIT);
1130                 if (rc != MBX_NOT_FINISHED)
1131                         return;
1132                 mempool_free(cfglink_mbox, phba->mbox_mem_pool);
1133         }
1134 out:
1135         lpfc_vport_set_state(vport, FC_VPORT_FAILED);
1136         lpfc_printf_vlog(vport, KERN_ERR, LOG_MBOX,
1137                          "0263 Discovery Mailbox error: state: 0x%x : %p %p\n",
1138                          vport->port_state, sparam_mbox, cfglink_mbox);
1139         lpfc_issue_clear_la(phba, vport);
1140         return;
1141 }
1142
1143 static void
1144 lpfc_enable_la(struct lpfc_hba *phba)
1145 {
1146         uint32_t control;
1147         struct lpfc_sli *psli = &phba->sli;
1148         spin_lock_irq(&phba->hbalock);
1149         psli->sli_flag |= LPFC_PROCESS_LA;
1150         control = readl(phba->HCregaddr);
1151         control |= HC_LAINT_ENA;
1152         writel(control, phba->HCregaddr);
1153         readl(phba->HCregaddr); /* flush */
1154         spin_unlock_irq(&phba->hbalock);
1155 }
1156
1157 static void
1158 lpfc_mbx_issue_link_down(struct lpfc_hba *phba)
1159 {
1160         lpfc_linkdown(phba);
1161         lpfc_enable_la(phba);
1162         /* turn on Link Attention interrupts - no CLEAR_LA needed */
1163 }
1164
1165
1166 /*
1167  * This routine handles processing a READ_LA mailbox
1168  * command upon completion. It is setup in the LPFC_MBOXQ
1169  * as the completion routine when the command is
1170  * handed off to the SLI layer.
1171  */
1172 void
1173 lpfc_mbx_cmpl_read_la(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
1174 {
1175         struct lpfc_vport *vport = pmb->vport;
1176         struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
1177         READ_LA_VAR *la;
1178         MAILBOX_t *mb = &pmb->mb;
1179         struct lpfc_dmabuf *mp = (struct lpfc_dmabuf *) (pmb->context1);
1180
1181         /* Unblock ELS traffic */
1182         phba->sli.ring[LPFC_ELS_RING].flag &= ~LPFC_STOP_IOCB_EVENT;
1183         /* Check for error */
1184         if (mb->mbxStatus) {
1185                 lpfc_printf_log(phba, KERN_INFO, LOG_LINK_EVENT,
1186                                 "1307 READ_LA mbox error x%x state x%x\n",
1187                                 mb->mbxStatus, vport->port_state);
1188                 lpfc_mbx_issue_link_down(phba);
1189                 phba->link_state = LPFC_HBA_ERROR;
1190                 goto lpfc_mbx_cmpl_read_la_free_mbuf;
1191         }
1192
1193         la = (READ_LA_VAR *) & pmb->mb.un.varReadLA;
1194
1195         memcpy(&phba->alpa_map[0], mp->virt, 128);
1196
1197         spin_lock_irq(shost->host_lock);
1198         if (la->pb)
1199                 vport->fc_flag |= FC_BYPASSED_MODE;
1200         else
1201                 vport->fc_flag &= ~FC_BYPASSED_MODE;
1202         spin_unlock_irq(shost->host_lock);
1203
1204         if (((phba->fc_eventTag + 1) < la->eventTag) ||
1205             (phba->fc_eventTag == la->eventTag)) {
1206                 phba->fc_stat.LinkMultiEvent++;
1207                 if (la->attType == AT_LINK_UP)
1208                         if (phba->fc_eventTag != 0)
1209                                 lpfc_linkdown(phba);
1210         }
1211
1212         phba->fc_eventTag = la->eventTag;
1213         if (la->mm)
1214                 phba->sli.sli_flag |= LPFC_MENLO_MAINT;
1215         else
1216                 phba->sli.sli_flag &= ~LPFC_MENLO_MAINT;
1217
1218         if (la->attType == AT_LINK_UP && (!la->mm)) {
1219                 phba->fc_stat.LinkUp++;
1220                 if (phba->link_flag & LS_LOOPBACK_MODE) {
1221                         lpfc_printf_log(phba, KERN_ERR, LOG_LINK_EVENT,
1222                                         "1306 Link Up Event in loop back mode "
1223                                         "x%x received Data: x%x x%x x%x x%x\n",
1224                                         la->eventTag, phba->fc_eventTag,
1225                                         la->granted_AL_PA, la->UlnkSpeed,
1226                                         phba->alpa_map[0]);
1227                 } else {
1228                         lpfc_printf_log(phba, KERN_ERR, LOG_LINK_EVENT,
1229                                         "1303 Link Up Event x%x received "
1230                                         "Data: x%x x%x x%x x%x x%x x%x %d\n",
1231                                         la->eventTag, phba->fc_eventTag,
1232                                         la->granted_AL_PA, la->UlnkSpeed,
1233                                         phba->alpa_map[0],
1234                                         la->mm, la->fa,
1235                                         phba->wait_4_mlo_maint_flg);
1236                 }
1237                 lpfc_mbx_process_link_up(phba, la);
1238         } else if (la->attType == AT_LINK_DOWN) {
1239                 phba->fc_stat.LinkDown++;
1240                 if (phba->link_flag & LS_LOOPBACK_MODE) {
1241                         lpfc_printf_log(phba, KERN_ERR, LOG_LINK_EVENT,
1242                                 "1308 Link Down Event in loop back mode "
1243                                 "x%x received "
1244                                 "Data: x%x x%x x%x\n",
1245                                 la->eventTag, phba->fc_eventTag,
1246                                 phba->pport->port_state, vport->fc_flag);
1247                 }
1248                 else {
1249                         lpfc_printf_log(phba, KERN_ERR, LOG_LINK_EVENT,
1250                                 "1305 Link Down Event x%x received "
1251                                 "Data: x%x x%x x%x x%x x%x\n",
1252                                 la->eventTag, phba->fc_eventTag,
1253                                 phba->pport->port_state, vport->fc_flag,
1254                                 la->mm, la->fa);
1255                 }
1256                 lpfc_mbx_issue_link_down(phba);
1257         }
1258         if (la->mm && la->attType == AT_LINK_UP) {
1259                 if (phba->link_state != LPFC_LINK_DOWN) {
1260                         phba->fc_stat.LinkDown++;
1261                         lpfc_printf_log(phba, KERN_ERR, LOG_LINK_EVENT,
1262                                 "1312 Link Down Event x%x received "
1263                                 "Data: x%x x%x x%x\n",
1264                                 la->eventTag, phba->fc_eventTag,
1265                                 phba->pport->port_state, vport->fc_flag);
1266                         lpfc_mbx_issue_link_down(phba);
1267                 } else
1268                         lpfc_enable_la(phba);
1269
1270                 lpfc_printf_log(phba, KERN_ERR, LOG_LINK_EVENT,
1271                                 "1310 Menlo Maint Mode Link up Event x%x rcvd "
1272                                 "Data: x%x x%x x%x\n",
1273                                 la->eventTag, phba->fc_eventTag,
1274                                 phba->pport->port_state, vport->fc_flag);
1275                 /*
1276                  * The cmnd that triggered this will be waiting for this
1277                  * signal.
1278                  */
1279                 /* WAKEUP for MENLO_SET_MODE or MENLO_RESET command. */
1280                 if (phba->wait_4_mlo_maint_flg) {
1281                         phba->wait_4_mlo_maint_flg = 0;
1282                         wake_up_interruptible(&phba->wait_4_mlo_m_q);
1283                 }
1284         }
1285
1286         if (la->fa) {
1287                 if (la->mm)
1288                         lpfc_issue_clear_la(phba, vport);
1289                 lpfc_printf_log(phba, KERN_INFO, LOG_LINK_EVENT,
1290                                 "1311 fa %d\n", la->fa);
1291         }
1292
1293 lpfc_mbx_cmpl_read_la_free_mbuf:
1294         lpfc_mbuf_free(phba, mp->virt, mp->phys);
1295         kfree(mp);
1296         mempool_free(pmb, phba->mbox_mem_pool);
1297         return;
1298 }
1299
1300 /*
1301  * This routine handles processing a REG_LOGIN mailbox
1302  * command upon completion. It is setup in the LPFC_MBOXQ
1303  * as the completion routine when the command is
1304  * handed off to the SLI layer.
1305  */
1306 void
1307 lpfc_mbx_cmpl_reg_login(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
1308 {
1309         struct lpfc_vport  *vport = pmb->vport;
1310         struct lpfc_dmabuf *mp = (struct lpfc_dmabuf *) (pmb->context1);
1311         struct lpfc_nodelist *ndlp = (struct lpfc_nodelist *) pmb->context2;
1312
1313         pmb->context1 = NULL;
1314
1315         /* Good status, call state machine */
1316         lpfc_disc_state_machine(vport, ndlp, pmb, NLP_EVT_CMPL_REG_LOGIN);
1317         lpfc_mbuf_free(phba, mp->virt, mp->phys);
1318         kfree(mp);
1319         mempool_free(pmb, phba->mbox_mem_pool);
1320         /* decrement the node reference count held for this callback
1321          * function.
1322          */
1323         lpfc_nlp_put(ndlp);
1324
1325         return;
1326 }
1327
1328 static void
1329 lpfc_mbx_cmpl_unreg_vpi(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
1330 {
1331         MAILBOX_t *mb = &pmb->mb;
1332         struct lpfc_vport *vport = pmb->vport;
1333         struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
1334
1335         switch (mb->mbxStatus) {
1336         case 0x0011:
1337         case 0x0020:
1338         case 0x9700:
1339                 lpfc_printf_vlog(vport, KERN_INFO, LOG_NODE,
1340                                  "0911 cmpl_unreg_vpi, mb status = 0x%x\n",
1341                                  mb->mbxStatus);
1342                 break;
1343         }
1344         vport->unreg_vpi_cmpl = VPORT_OK;
1345         mempool_free(pmb, phba->mbox_mem_pool);
1346         /*
1347          * This shost reference might have been taken at the beginning of
1348          * lpfc_vport_delete()
1349          */
1350         if (vport->load_flag & FC_UNLOADING)
1351                 scsi_host_put(shost);
1352 }
1353
1354 int
1355 lpfc_mbx_unreg_vpi(struct lpfc_vport *vport)
1356 {
1357         struct lpfc_hba  *phba = vport->phba;
1358         LPFC_MBOXQ_t *mbox;
1359         int rc;
1360
1361         mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
1362         if (!mbox)
1363                 return 1;
1364
1365         lpfc_unreg_vpi(phba, vport->vpi, mbox);
1366         mbox->vport = vport;
1367         mbox->mbox_cmpl = lpfc_mbx_cmpl_unreg_vpi;
1368         rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
1369         if (rc == MBX_NOT_FINISHED) {
1370                 lpfc_printf_vlog(vport, KERN_ERR, LOG_MBOX | LOG_VPORT,
1371                                  "1800 Could not issue unreg_vpi\n");
1372                 mempool_free(mbox, phba->mbox_mem_pool);
1373                 vport->unreg_vpi_cmpl = VPORT_ERROR;
1374                 return rc;
1375         }
1376         return 0;
1377 }
1378
1379 static void
1380 lpfc_mbx_cmpl_reg_vpi(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
1381 {
1382         struct lpfc_vport *vport = pmb->vport;
1383         struct Scsi_Host  *shost = lpfc_shost_from_vport(vport);
1384         MAILBOX_t *mb = &pmb->mb;
1385
1386         switch (mb->mbxStatus) {
1387         case 0x0011:
1388         case 0x9601:
1389         case 0x9602:
1390                 lpfc_printf_vlog(vport, KERN_INFO, LOG_NODE,
1391                                  "0912 cmpl_reg_vpi, mb status = 0x%x\n",
1392                                  mb->mbxStatus);
1393                 lpfc_vport_set_state(vport, FC_VPORT_FAILED);
1394                 spin_lock_irq(shost->host_lock);
1395                 vport->fc_flag &= ~(FC_FABRIC | FC_PUBLIC_LOOP);
1396                 spin_unlock_irq(shost->host_lock);
1397                 vport->fc_myDID = 0;
1398                 goto out;
1399         }
1400
1401         vport->num_disc_nodes = 0;
1402         /* go thru NPR list and issue ELS PLOGIs */
1403         if (vport->fc_npr_cnt)
1404                 lpfc_els_disc_plogi(vport);
1405
1406         if (!vport->num_disc_nodes) {
1407                 spin_lock_irq(shost->host_lock);
1408                 vport->fc_flag &= ~FC_NDISC_ACTIVE;
1409                 spin_unlock_irq(shost->host_lock);
1410                 lpfc_can_disctmo(vport);
1411         }
1412         vport->port_state = LPFC_VPORT_READY;
1413
1414 out:
1415         mempool_free(pmb, phba->mbox_mem_pool);
1416         return;
1417 }
1418
1419 /*
1420  * This routine handles processing a Fabric REG_LOGIN mailbox
1421  * command upon completion. It is setup in the LPFC_MBOXQ
1422  * as the completion routine when the command is
1423  * handed off to the SLI layer.
1424  */
1425 void
1426 lpfc_mbx_cmpl_fabric_reg_login(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
1427 {
1428         struct lpfc_vport *vport = pmb->vport;
1429         MAILBOX_t *mb = &pmb->mb;
1430         struct lpfc_dmabuf *mp = (struct lpfc_dmabuf *) (pmb->context1);
1431         struct lpfc_nodelist *ndlp;
1432         struct lpfc_vport **vports;
1433         int i;
1434
1435         ndlp = (struct lpfc_nodelist *) pmb->context2;
1436         pmb->context1 = NULL;
1437         pmb->context2 = NULL;
1438         if (mb->mbxStatus) {
1439                 lpfc_mbuf_free(phba, mp->virt, mp->phys);
1440                 kfree(mp);
1441                 mempool_free(pmb, phba->mbox_mem_pool);
1442
1443                 if (phba->fc_topology == TOPOLOGY_LOOP) {
1444                         /* FLOGI failed, use loop map to make discovery list */
1445                         lpfc_disc_list_loopmap(vport);
1446
1447                         /* Start discovery */
1448                         lpfc_disc_start(vport);
1449                         /* Decrement the reference count to ndlp after the
1450                          * reference to the ndlp are done.
1451                          */
1452                         lpfc_nlp_put(ndlp);
1453                         return;
1454                 }
1455
1456                 lpfc_vport_set_state(vport, FC_VPORT_FAILED);
1457                 lpfc_printf_vlog(vport, KERN_ERR, LOG_MBOX,
1458                                  "0258 Register Fabric login error: 0x%x\n",
1459                                  mb->mbxStatus);
1460                 /* Decrement the reference count to ndlp after the reference
1461                  * to the ndlp are done.
1462                  */
1463                 lpfc_nlp_put(ndlp);
1464                 return;
1465         }
1466
1467         ndlp->nlp_rpi = mb->un.varWords[0];
1468         ndlp->nlp_type |= NLP_FABRIC;
1469         lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
1470
1471         if (vport->port_state == LPFC_FABRIC_CFG_LINK) {
1472                 vports = lpfc_create_vport_work_array(phba);
1473                 if (vports != NULL)
1474                         for(i = 0;
1475                             i <= phba->max_vpi && vports[i] != NULL;
1476                             i++) {
1477                                 if (vports[i]->port_type == LPFC_PHYSICAL_PORT)
1478                                         continue;
1479                                 if (phba->fc_topology == TOPOLOGY_LOOP) {
1480                                         lpfc_vport_set_state(vports[i],
1481                                                         FC_VPORT_LINKDOWN);
1482                                         continue;
1483                                 }
1484                                 if (phba->link_flag & LS_NPIV_FAB_SUPPORTED)
1485                                         lpfc_initial_fdisc(vports[i]);
1486                                 else {
1487                                         lpfc_vport_set_state(vports[i],
1488                                                 FC_VPORT_NO_FABRIC_SUPP);
1489                                         lpfc_printf_vlog(vport, KERN_ERR,
1490                                                          LOG_ELS,
1491                                                         "0259 No NPIV "
1492                                                         "Fabric support\n");
1493                                 }
1494                         }
1495                 lpfc_destroy_vport_work_array(phba, vports);
1496                 lpfc_do_scr_ns_plogi(phba, vport);
1497         }
1498
1499         lpfc_mbuf_free(phba, mp->virt, mp->phys);
1500         kfree(mp);
1501         mempool_free(pmb, phba->mbox_mem_pool);
1502
1503         /* Drop the reference count from the mbox at the end after
1504          * all the current reference to the ndlp have been done.
1505          */
1506         lpfc_nlp_put(ndlp);
1507         return;
1508 }
1509
1510 /*
1511  * This routine handles processing a NameServer REG_LOGIN mailbox
1512  * command upon completion. It is setup in the LPFC_MBOXQ
1513  * as the completion routine when the command is
1514  * handed off to the SLI layer.
1515  */
1516 void
1517 lpfc_mbx_cmpl_ns_reg_login(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
1518 {
1519         MAILBOX_t *mb = &pmb->mb;
1520         struct lpfc_dmabuf *mp = (struct lpfc_dmabuf *) (pmb->context1);
1521         struct lpfc_nodelist *ndlp = (struct lpfc_nodelist *) pmb->context2;
1522         struct lpfc_vport *vport = pmb->vport;
1523
1524         if (mb->mbxStatus) {
1525 out:
1526                 /* decrement the node reference count held for this
1527                  * callback function.
1528                  */
1529                 lpfc_nlp_put(ndlp);
1530                 lpfc_mbuf_free(phba, mp->virt, mp->phys);
1531                 kfree(mp);
1532                 mempool_free(pmb, phba->mbox_mem_pool);
1533
1534                 /* If no other thread is using the ndlp, free it */
1535                 lpfc_nlp_not_used(ndlp);
1536
1537                 if (phba->fc_topology == TOPOLOGY_LOOP) {
1538                         /*
1539                          * RegLogin failed, use loop map to make discovery
1540                          * list
1541                          */
1542                         lpfc_disc_list_loopmap(vport);
1543
1544                         /* Start discovery */
1545                         lpfc_disc_start(vport);
1546                         return;
1547                 }
1548                 lpfc_vport_set_state(vport, FC_VPORT_FAILED);
1549                 lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
1550                                  "0260 Register NameServer error: 0x%x\n",
1551                                  mb->mbxStatus);
1552                 return;
1553         }
1554
1555         pmb->context1 = NULL;
1556
1557         ndlp->nlp_rpi = mb->un.varWords[0];
1558         ndlp->nlp_type |= NLP_FABRIC;
1559         lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
1560
1561         if (vport->port_state < LPFC_VPORT_READY) {
1562                 /* Link up discovery requires Fabric registration. */
1563                 lpfc_ns_cmd(vport, SLI_CTNS_RFF_ID, 0, 0); /* Do this first! */
1564                 lpfc_ns_cmd(vport, SLI_CTNS_RNN_ID, 0, 0);
1565                 lpfc_ns_cmd(vport, SLI_CTNS_RSNN_NN, 0, 0);
1566                 lpfc_ns_cmd(vport, SLI_CTNS_RSPN_ID, 0, 0);
1567                 lpfc_ns_cmd(vport, SLI_CTNS_RFT_ID, 0, 0);
1568
1569                 /* Issue SCR just before NameServer GID_FT Query */
1570                 lpfc_issue_els_scr(vport, SCR_DID, 0);
1571         }
1572
1573         vport->fc_ns_retry = 0;
1574         /* Good status, issue CT Request to NameServer */
1575         if (lpfc_ns_cmd(vport, SLI_CTNS_GID_FT, 0, 0)) {
1576                 /* Cannot issue NameServer Query, so finish up discovery */
1577                 goto out;
1578         }
1579
1580         /* decrement the node reference count held for this
1581          * callback function.
1582          */
1583         lpfc_nlp_put(ndlp);
1584         lpfc_mbuf_free(phba, mp->virt, mp->phys);
1585         kfree(mp);
1586         mempool_free(pmb, phba->mbox_mem_pool);
1587
1588         return;
1589 }
1590
1591 static void
1592 lpfc_register_remote_port(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
1593 {
1594         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1595         struct fc_rport  *rport;
1596         struct lpfc_rport_data *rdata;
1597         struct fc_rport_identifiers rport_ids;
1598         struct lpfc_hba  *phba = vport->phba;
1599
1600         /* Remote port has reappeared. Re-register w/ FC transport */
1601         rport_ids.node_name = wwn_to_u64(ndlp->nlp_nodename.u.wwn);
1602         rport_ids.port_name = wwn_to_u64(ndlp->nlp_portname.u.wwn);
1603         rport_ids.port_id = ndlp->nlp_DID;
1604         rport_ids.roles = FC_RPORT_ROLE_UNKNOWN;
1605
1606         /*
1607          * We leave our node pointer in rport->dd_data when we unregister a
1608          * FCP target port.  But fc_remote_port_add zeros the space to which
1609          * rport->dd_data points.  So, if we're reusing a previously
1610          * registered port, drop the reference that we took the last time we
1611          * registered the port.
1612          */
1613         if (ndlp->rport && ndlp->rport->dd_data &&
1614             ((struct lpfc_rport_data *) ndlp->rport->dd_data)->pnode == ndlp)
1615                 lpfc_nlp_put(ndlp);
1616
1617         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_RPORT,
1618                 "rport add:       did:x%x flg:x%x type x%x",
1619                 ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_type);
1620
1621         ndlp->rport = rport = fc_remote_port_add(shost, 0, &rport_ids);
1622         if (!rport || !get_device(&rport->dev)) {
1623                 dev_printk(KERN_WARNING, &phba->pcidev->dev,
1624                            "Warning: fc_remote_port_add failed\n");
1625                 return;
1626         }
1627
1628         /* initialize static port data */
1629         rport->maxframe_size = ndlp->nlp_maxframe;
1630         rport->supported_classes = ndlp->nlp_class_sup;
1631         rdata = rport->dd_data;
1632         rdata->pnode = lpfc_nlp_get(ndlp);
1633
1634         if (ndlp->nlp_type & NLP_FCP_TARGET)
1635                 rport_ids.roles |= FC_RPORT_ROLE_FCP_TARGET;
1636         if (ndlp->nlp_type & NLP_FCP_INITIATOR)
1637                 rport_ids.roles |= FC_RPORT_ROLE_FCP_INITIATOR;
1638
1639
1640         if (rport_ids.roles !=  FC_RPORT_ROLE_UNKNOWN)
1641                 fc_remote_port_rolechg(rport, rport_ids.roles);
1642
1643         if ((rport->scsi_target_id != -1) &&
1644             (rport->scsi_target_id < LPFC_MAX_TARGET)) {
1645                 ndlp->nlp_sid = rport->scsi_target_id;
1646         }
1647         return;
1648 }
1649
1650 static void
1651 lpfc_unregister_remote_port(struct lpfc_nodelist *ndlp)
1652 {
1653         struct fc_rport *rport = ndlp->rport;
1654
1655         lpfc_debugfs_disc_trc(ndlp->vport, LPFC_DISC_TRC_RPORT,
1656                 "rport delete:    did:x%x flg:x%x type x%x",
1657                 ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_type);
1658
1659         fc_remote_port_delete(rport);
1660
1661         return;
1662 }
1663
1664 static void
1665 lpfc_nlp_counters(struct lpfc_vport *vport, int state, int count)
1666 {
1667         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1668
1669         spin_lock_irq(shost->host_lock);
1670         switch (state) {
1671         case NLP_STE_UNUSED_NODE:
1672                 vport->fc_unused_cnt += count;
1673                 break;
1674         case NLP_STE_PLOGI_ISSUE:
1675                 vport->fc_plogi_cnt += count;
1676                 break;
1677         case NLP_STE_ADISC_ISSUE:
1678                 vport->fc_adisc_cnt += count;
1679                 break;
1680         case NLP_STE_REG_LOGIN_ISSUE:
1681                 vport->fc_reglogin_cnt += count;
1682                 break;
1683         case NLP_STE_PRLI_ISSUE:
1684                 vport->fc_prli_cnt += count;
1685                 break;
1686         case NLP_STE_UNMAPPED_NODE:
1687                 vport->fc_unmap_cnt += count;
1688                 break;
1689         case NLP_STE_MAPPED_NODE:
1690                 vport->fc_map_cnt += count;
1691                 break;
1692         case NLP_STE_NPR_NODE:
1693                 vport->fc_npr_cnt += count;
1694                 break;
1695         }
1696         spin_unlock_irq(shost->host_lock);
1697 }
1698
1699 static void
1700 lpfc_nlp_state_cleanup(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1701                        int old_state, int new_state)
1702 {
1703         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1704
1705         if (new_state == NLP_STE_UNMAPPED_NODE) {
1706                 ndlp->nlp_type &= ~(NLP_FCP_TARGET | NLP_FCP_INITIATOR);
1707                 ndlp->nlp_flag &= ~NLP_NODEV_REMOVE;
1708                 ndlp->nlp_type |= NLP_FC_NODE;
1709         }
1710         if (new_state == NLP_STE_MAPPED_NODE)
1711                 ndlp->nlp_flag &= ~NLP_NODEV_REMOVE;
1712         if (new_state == NLP_STE_NPR_NODE)
1713                 ndlp->nlp_flag &= ~NLP_RCV_PLOGI;
1714
1715         /* Transport interface */
1716         if (ndlp->rport && (old_state == NLP_STE_MAPPED_NODE ||
1717                             old_state == NLP_STE_UNMAPPED_NODE)) {
1718                 vport->phba->nport_event_cnt++;
1719                 lpfc_unregister_remote_port(ndlp);
1720         }
1721
1722         if (new_state ==  NLP_STE_MAPPED_NODE ||
1723             new_state == NLP_STE_UNMAPPED_NODE) {
1724                 vport->phba->nport_event_cnt++;
1725                 /*
1726                  * Tell the fc transport about the port, if we haven't
1727                  * already. If we have, and it's a scsi entity, be
1728                  * sure to unblock any attached scsi devices
1729                  */
1730                 lpfc_register_remote_port(vport, ndlp);
1731         }
1732         if ((new_state ==  NLP_STE_MAPPED_NODE) &&
1733                 (vport->stat_data_enabled)) {
1734                 /*
1735                  * A new target is discovered, if there is no buffer for
1736                  * statistical data collection allocate buffer.
1737                  */
1738                 ndlp->lat_data = kcalloc(LPFC_MAX_BUCKET_COUNT,
1739                                          sizeof(struct lpfc_scsicmd_bkt),
1740                                          GFP_KERNEL);
1741
1742                 if (!ndlp->lat_data)
1743                         lpfc_printf_vlog(vport, KERN_ERR, LOG_NODE,
1744                                 "0286 lpfc_nlp_state_cleanup failed to "
1745                                 "allocate statistical data buffer DID "
1746                                 "0x%x\n", ndlp->nlp_DID);
1747         }
1748         /*
1749          * if we added to Mapped list, but the remote port
1750          * registration failed or assigned a target id outside
1751          * our presentable range - move the node to the
1752          * Unmapped List
1753          */
1754         if (new_state == NLP_STE_MAPPED_NODE &&
1755             (!ndlp->rport ||
1756              ndlp->rport->scsi_target_id == -1 ||
1757              ndlp->rport->scsi_target_id >= LPFC_MAX_TARGET)) {
1758                 spin_lock_irq(shost->host_lock);
1759                 ndlp->nlp_flag |= NLP_TGT_NO_SCSIID;
1760                 spin_unlock_irq(shost->host_lock);
1761                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
1762         }
1763 }
1764
1765 static char *
1766 lpfc_nlp_state_name(char *buffer, size_t size, int state)
1767 {
1768         static char *states[] = {
1769                 [NLP_STE_UNUSED_NODE] = "UNUSED",
1770                 [NLP_STE_PLOGI_ISSUE] = "PLOGI",
1771                 [NLP_STE_ADISC_ISSUE] = "ADISC",
1772                 [NLP_STE_REG_LOGIN_ISSUE] = "REGLOGIN",
1773                 [NLP_STE_PRLI_ISSUE] = "PRLI",
1774                 [NLP_STE_UNMAPPED_NODE] = "UNMAPPED",
1775                 [NLP_STE_MAPPED_NODE] = "MAPPED",
1776                 [NLP_STE_NPR_NODE] = "NPR",
1777         };
1778
1779         if (state < NLP_STE_MAX_STATE && states[state])
1780                 strlcpy(buffer, states[state], size);
1781         else
1782                 snprintf(buffer, size, "unknown (%d)", state);
1783         return buffer;
1784 }
1785
1786 void
1787 lpfc_nlp_set_state(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1788                    int state)
1789 {
1790         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1791         int  old_state = ndlp->nlp_state;
1792         char name1[16], name2[16];
1793
1794         lpfc_printf_vlog(vport, KERN_INFO, LOG_NODE,
1795                          "0904 NPort state transition x%06x, %s -> %s\n",
1796                          ndlp->nlp_DID,
1797                          lpfc_nlp_state_name(name1, sizeof(name1), old_state),
1798                          lpfc_nlp_state_name(name2, sizeof(name2), state));
1799
1800         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_NODE,
1801                 "node statechg    did:x%x old:%d ste:%d",
1802                 ndlp->nlp_DID, old_state, state);
1803
1804         if (old_state == NLP_STE_NPR_NODE &&
1805             state != NLP_STE_NPR_NODE)
1806                 lpfc_cancel_retry_delay_tmo(vport, ndlp);
1807         if (old_state == NLP_STE_UNMAPPED_NODE) {
1808                 ndlp->nlp_flag &= ~NLP_TGT_NO_SCSIID;
1809                 ndlp->nlp_type &= ~NLP_FC_NODE;
1810         }
1811
1812         if (list_empty(&ndlp->nlp_listp)) {
1813                 spin_lock_irq(shost->host_lock);
1814                 list_add_tail(&ndlp->nlp_listp, &vport->fc_nodes);
1815                 spin_unlock_irq(shost->host_lock);
1816         } else if (old_state)
1817                 lpfc_nlp_counters(vport, old_state, -1);
1818
1819         ndlp->nlp_state = state;
1820         lpfc_nlp_counters(vport, state, 1);
1821         lpfc_nlp_state_cleanup(vport, ndlp, old_state, state);
1822 }
1823
1824 void
1825 lpfc_enqueue_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
1826 {
1827         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1828
1829         if (list_empty(&ndlp->nlp_listp)) {
1830                 spin_lock_irq(shost->host_lock);
1831                 list_add_tail(&ndlp->nlp_listp, &vport->fc_nodes);
1832                 spin_unlock_irq(shost->host_lock);
1833         }
1834 }
1835
1836 void
1837 lpfc_dequeue_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
1838 {
1839         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1840
1841         lpfc_cancel_retry_delay_tmo(vport, ndlp);
1842         if (ndlp->nlp_state && !list_empty(&ndlp->nlp_listp))
1843                 lpfc_nlp_counters(vport, ndlp->nlp_state, -1);
1844         spin_lock_irq(shost->host_lock);
1845         list_del_init(&ndlp->nlp_listp);
1846         spin_unlock_irq(shost->host_lock);
1847         lpfc_nlp_state_cleanup(vport, ndlp, ndlp->nlp_state,
1848                                 NLP_STE_UNUSED_NODE);
1849 }
1850
1851 static void
1852 lpfc_disable_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
1853 {
1854         lpfc_cancel_retry_delay_tmo(vport, ndlp);
1855         if (ndlp->nlp_state && !list_empty(&ndlp->nlp_listp))
1856                 lpfc_nlp_counters(vport, ndlp->nlp_state, -1);
1857         lpfc_nlp_state_cleanup(vport, ndlp, ndlp->nlp_state,
1858                                 NLP_STE_UNUSED_NODE);
1859 }
1860 /**
1861  * lpfc_initialize_node - Initialize all fields of node object
1862  * @vport: Pointer to Virtual Port object.
1863  * @ndlp: Pointer to FC node object.
1864  * @did: FC_ID of the node.
1865  *
1866  * This function is always called when node object need to be initialized.
1867  * It initializes all the fields of the node object. Although the reference
1868  * to phba from @ndlp can be obtained indirectly through it's reference to
1869  * @vport, a direct reference to phba is taken here by @ndlp. This is due
1870  * to the life-span of the @ndlp might go beyond the existence of @vport as
1871  * the final release of ndlp is determined by its reference count. And, the
1872  * operation on @ndlp needs the reference to phba.
1873  **/
1874 static inline void
1875 lpfc_initialize_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1876         uint32_t did)
1877 {
1878         INIT_LIST_HEAD(&ndlp->els_retry_evt.evt_listp);
1879         INIT_LIST_HEAD(&ndlp->dev_loss_evt.evt_listp);
1880         init_timer(&ndlp->nlp_delayfunc);
1881         ndlp->nlp_delayfunc.function = lpfc_els_retry_delay;
1882         ndlp->nlp_delayfunc.data = (unsigned long)ndlp;
1883         ndlp->nlp_DID = did;
1884         ndlp->vport = vport;
1885         ndlp->phba = vport->phba;
1886         ndlp->nlp_sid = NLP_NO_SID;
1887         kref_init(&ndlp->kref);
1888         NLP_INT_NODE_ACT(ndlp);
1889         atomic_set(&ndlp->cmd_pending, 0);
1890         ndlp->cmd_qdepth = LPFC_MAX_TGT_QDEPTH;
1891 }
1892
1893 struct lpfc_nodelist *
1894 lpfc_enable_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
1895                  int state)
1896 {
1897         struct lpfc_hba *phba = vport->phba;
1898         uint32_t did;
1899         unsigned long flags;
1900
1901         if (!ndlp)
1902                 return NULL;
1903
1904         spin_lock_irqsave(&phba->ndlp_lock, flags);
1905         /* The ndlp should not be in memory free mode */
1906         if (NLP_CHK_FREE_REQ(ndlp)) {
1907                 spin_unlock_irqrestore(&phba->ndlp_lock, flags);
1908                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_NODE,
1909                                 "0277 lpfc_enable_node: ndlp:x%p "
1910                                 "usgmap:x%x refcnt:%d\n",
1911                                 (void *)ndlp, ndlp->nlp_usg_map,
1912                                 atomic_read(&ndlp->kref.refcount));
1913                 return NULL;
1914         }
1915         /* The ndlp should not already be in active mode */
1916         if (NLP_CHK_NODE_ACT(ndlp)) {
1917                 spin_unlock_irqrestore(&phba->ndlp_lock, flags);
1918                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_NODE,
1919                                 "0278 lpfc_enable_node: ndlp:x%p "
1920                                 "usgmap:x%x refcnt:%d\n",
1921                                 (void *)ndlp, ndlp->nlp_usg_map,
1922                                 atomic_read(&ndlp->kref.refcount));
1923                 return NULL;
1924         }
1925
1926         /* Keep the original DID */
1927         did = ndlp->nlp_DID;
1928
1929         /* re-initialize ndlp except of ndlp linked list pointer */
1930         memset((((char *)ndlp) + sizeof (struct list_head)), 0,
1931                 sizeof (struct lpfc_nodelist) - sizeof (struct list_head));
1932         lpfc_initialize_node(vport, ndlp, did);
1933
1934         spin_unlock_irqrestore(&phba->ndlp_lock, flags);
1935
1936         if (state != NLP_STE_UNUSED_NODE)
1937                 lpfc_nlp_set_state(vport, ndlp, state);
1938
1939         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_NODE,
1940                 "node enable:       did:x%x",
1941                 ndlp->nlp_DID, 0, 0);
1942         return ndlp;
1943 }
1944
1945 void
1946 lpfc_drop_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
1947 {
1948         /*
1949          * Use of lpfc_drop_node and UNUSED list: lpfc_drop_node should
1950          * be used if we wish to issue the "last" lpfc_nlp_put() to remove
1951          * the ndlp from the vport. The ndlp marked as UNUSED on the list
1952          * until ALL other outstanding threads have completed. We check
1953          * that the ndlp not already in the UNUSED state before we proceed.
1954          */
1955         if (ndlp->nlp_state == NLP_STE_UNUSED_NODE)
1956                 return;
1957         lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNUSED_NODE);
1958         lpfc_nlp_put(ndlp);
1959         return;
1960 }
1961
1962 /*
1963  * Start / ReStart rescue timer for Discovery / RSCN handling
1964  */
1965 void
1966 lpfc_set_disctmo(struct lpfc_vport *vport)
1967 {
1968         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
1969         struct lpfc_hba  *phba = vport->phba;
1970         uint32_t tmo;
1971
1972         if (vport->port_state == LPFC_LOCAL_CFG_LINK) {
1973                 /* For FAN, timeout should be greater than edtov */
1974                 tmo = (((phba->fc_edtov + 999) / 1000) + 1);
1975         } else {
1976                 /* Normal discovery timeout should be > than ELS/CT timeout
1977                  * FC spec states we need 3 * ratov for CT requests
1978                  */
1979                 tmo = ((phba->fc_ratov * 3) + 3);
1980         }
1981
1982
1983         if (!timer_pending(&vport->fc_disctmo)) {
1984                 lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
1985                         "set disc timer:  tmo:x%x state:x%x flg:x%x",
1986                         tmo, vport->port_state, vport->fc_flag);
1987         }
1988
1989         mod_timer(&vport->fc_disctmo, jiffies + HZ * tmo);
1990         spin_lock_irq(shost->host_lock);
1991         vport->fc_flag |= FC_DISC_TMO;
1992         spin_unlock_irq(shost->host_lock);
1993
1994         /* Start Discovery Timer state <hba_state> */
1995         lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
1996                          "0247 Start Discovery Timer state x%x "
1997                          "Data: x%x x%lx x%x x%x\n",
1998                          vport->port_state, tmo,
1999                          (unsigned long)&vport->fc_disctmo, vport->fc_plogi_cnt,
2000                          vport->fc_adisc_cnt);
2001
2002         return;
2003 }
2004
2005 /*
2006  * Cancel rescue timer for Discovery / RSCN handling
2007  */
2008 int
2009 lpfc_can_disctmo(struct lpfc_vport *vport)
2010 {
2011         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
2012         unsigned long iflags;
2013
2014         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
2015                 "can disc timer:  state:x%x rtry:x%x flg:x%x",
2016                 vport->port_state, vport->fc_ns_retry, vport->fc_flag);
2017
2018         /* Turn off discovery timer if its running */
2019         if (vport->fc_flag & FC_DISC_TMO) {
2020                 spin_lock_irqsave(shost->host_lock, iflags);
2021                 vport->fc_flag &= ~FC_DISC_TMO;
2022                 spin_unlock_irqrestore(shost->host_lock, iflags);
2023                 del_timer_sync(&vport->fc_disctmo);
2024                 spin_lock_irqsave(&vport->work_port_lock, iflags);
2025                 vport->work_port_events &= ~WORKER_DISC_TMO;
2026                 spin_unlock_irqrestore(&vport->work_port_lock, iflags);
2027         }
2028
2029         /* Cancel Discovery Timer state <hba_state> */
2030         lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
2031                          "0248 Cancel Discovery Timer state x%x "
2032                          "Data: x%x x%x x%x\n",
2033                          vport->port_state, vport->fc_flag,
2034                          vport->fc_plogi_cnt, vport->fc_adisc_cnt);
2035         return 0;
2036 }
2037
2038 /*
2039  * Check specified ring for outstanding IOCB on the SLI queue
2040  * Return true if iocb matches the specified nport
2041  */
2042 int
2043 lpfc_check_sli_ndlp(struct lpfc_hba *phba,
2044                     struct lpfc_sli_ring *pring,
2045                     struct lpfc_iocbq *iocb,
2046                     struct lpfc_nodelist *ndlp)
2047 {
2048         struct lpfc_sli *psli = &phba->sli;
2049         IOCB_t *icmd = &iocb->iocb;
2050         struct lpfc_vport    *vport = ndlp->vport;
2051
2052         if (iocb->vport != vport)
2053                 return 0;
2054
2055         if (pring->ringno == LPFC_ELS_RING) {
2056                 switch (icmd->ulpCommand) {
2057                 case CMD_GEN_REQUEST64_CR:
2058                         if (icmd->ulpContext == (volatile ushort)ndlp->nlp_rpi)
2059                                 return 1;
2060                 case CMD_ELS_REQUEST64_CR:
2061                         if (icmd->un.elsreq64.remoteID == ndlp->nlp_DID)
2062                                 return 1;
2063                 case CMD_XMIT_ELS_RSP64_CX:
2064                         if (iocb->context1 == (uint8_t *) ndlp)
2065                                 return 1;
2066                 }
2067         } else if (pring->ringno == psli->extra_ring) {
2068
2069         } else if (pring->ringno == psli->fcp_ring) {
2070                 /* Skip match check if waiting to relogin to FCP target */
2071                 if ((ndlp->nlp_type & NLP_FCP_TARGET) &&
2072                     (ndlp->nlp_flag & NLP_DELAY_TMO)) {
2073                         return 0;
2074                 }
2075                 if (icmd->ulpContext == (volatile ushort)ndlp->nlp_rpi) {
2076                         return 1;
2077                 }
2078         } else if (pring->ringno == psli->next_ring) {
2079
2080         }
2081         return 0;
2082 }
2083
2084 /*
2085  * Free resources / clean up outstanding I/Os
2086  * associated with nlp_rpi in the LPFC_NODELIST entry.
2087  */
2088 static int
2089 lpfc_no_rpi(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
2090 {
2091         LIST_HEAD(completions);
2092         struct lpfc_sli *psli;
2093         struct lpfc_sli_ring *pring;
2094         struct lpfc_iocbq *iocb, *next_iocb;
2095         uint32_t rpi, i;
2096
2097         lpfc_fabric_abort_nport(ndlp);
2098
2099         /*
2100          * Everything that matches on txcmplq will be returned
2101          * by firmware with a no rpi error.
2102          */
2103         psli = &phba->sli;
2104         rpi = ndlp->nlp_rpi;
2105         if (rpi) {
2106                 /* Now process each ring */
2107                 for (i = 0; i < psli->num_rings; i++) {
2108                         pring = &psli->ring[i];
2109
2110                         spin_lock_irq(&phba->hbalock);
2111                         list_for_each_entry_safe(iocb, next_iocb, &pring->txq,
2112                                                  list) {
2113                                 /*
2114                                  * Check to see if iocb matches the nport we are
2115                                  * looking for
2116                                  */
2117                                 if ((lpfc_check_sli_ndlp(phba, pring, iocb,
2118                                                          ndlp))) {
2119                                         /* It matches, so deque and call compl
2120                                            with an error */
2121                                         list_move_tail(&iocb->list,
2122                                                        &completions);
2123                                         pring->txq_cnt--;
2124                                 }
2125                         }
2126                         spin_unlock_irq(&phba->hbalock);
2127                 }
2128         }
2129
2130         /* Cancel all the IOCBs from the completions list */
2131         lpfc_sli_cancel_iocbs(phba, &completions, IOSTAT_LOCAL_REJECT,
2132                               IOERR_SLI_ABORTED);
2133
2134         return 0;
2135 }
2136
2137 /*
2138  * Free rpi associated with LPFC_NODELIST entry.
2139  * This routine is called from lpfc_freenode(), when we are removing
2140  * a LPFC_NODELIST entry. It is also called if the driver initiates a
2141  * LOGO that completes successfully, and we are waiting to PLOGI back
2142  * to the remote NPort. In addition, it is called after we receive
2143  * and unsolicated ELS cmd, send back a rsp, the rsp completes and
2144  * we are waiting to PLOGI back to the remote NPort.
2145  */
2146 int
2147 lpfc_unreg_rpi(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
2148 {
2149         struct lpfc_hba *phba = vport->phba;
2150         LPFC_MBOXQ_t    *mbox;
2151         int rc;
2152
2153         if (ndlp->nlp_rpi) {
2154                 mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
2155                 if (mbox) {
2156                         lpfc_unreg_login(phba, vport->vpi, ndlp->nlp_rpi, mbox);
2157                         mbox->vport = vport;
2158                         mbox->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
2159                         rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
2160                         if (rc == MBX_NOT_FINISHED)
2161                                 mempool_free(mbox, phba->mbox_mem_pool);
2162                 }
2163                 lpfc_no_rpi(phba, ndlp);
2164                 ndlp->nlp_rpi = 0;
2165                 return 1;
2166         }
2167         return 0;
2168 }
2169
2170 void
2171 lpfc_unreg_all_rpis(struct lpfc_vport *vport)
2172 {
2173         struct lpfc_hba  *phba  = vport->phba;
2174         LPFC_MBOXQ_t     *mbox;
2175         int rc;
2176
2177         mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
2178         if (mbox) {
2179                 lpfc_unreg_login(phba, vport->vpi, 0xffff, mbox);
2180                 mbox->vport = vport;
2181                 mbox->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
2182                 mbox->context1 = NULL;
2183                 rc = lpfc_sli_issue_mbox_wait(phba, mbox, LPFC_MBOX_TMO);
2184                 if (rc != MBX_TIMEOUT)
2185                         mempool_free(mbox, phba->mbox_mem_pool);
2186
2187                 if ((rc == MBX_TIMEOUT) || (rc == MBX_NOT_FINISHED))
2188                         lpfc_printf_vlog(vport, KERN_ERR, LOG_MBOX | LOG_VPORT,
2189                                 "1836 Could not issue "
2190                                 "unreg_login(all_rpis) status %d\n", rc);
2191         }
2192 }
2193
2194 void
2195 lpfc_unreg_default_rpis(struct lpfc_vport *vport)
2196 {
2197         struct lpfc_hba  *phba  = vport->phba;
2198         LPFC_MBOXQ_t     *mbox;
2199         int rc;
2200
2201         mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
2202         if (mbox) {
2203                 lpfc_unreg_did(phba, vport->vpi, 0xffffffff, mbox);
2204                 mbox->vport = vport;
2205                 mbox->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
2206                 mbox->context1 = NULL;
2207                 rc = lpfc_sli_issue_mbox_wait(phba, mbox, LPFC_MBOX_TMO);
2208                 if (rc != MBX_TIMEOUT)
2209                         mempool_free(mbox, phba->mbox_mem_pool);
2210
2211                 if ((rc == MBX_TIMEOUT) || (rc == MBX_NOT_FINISHED))
2212                         lpfc_printf_vlog(vport, KERN_ERR, LOG_MBOX | LOG_VPORT,
2213                                          "1815 Could not issue "
2214                                          "unreg_did (default rpis) status %d\n",
2215                                          rc);
2216         }
2217 }
2218
2219 /*
2220  * Free resources associated with LPFC_NODELIST entry
2221  * so it can be freed.
2222  */
2223 static int
2224 lpfc_cleanup_node(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
2225 {
2226         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
2227         struct lpfc_hba  *phba = vport->phba;
2228         LPFC_MBOXQ_t *mb, *nextmb;
2229         struct lpfc_dmabuf *mp;
2230
2231         /* Cleanup node for NPort <nlp_DID> */
2232         lpfc_printf_vlog(vport, KERN_INFO, LOG_NODE,
2233                          "0900 Cleanup node for NPort x%x "
2234                          "Data: x%x x%x x%x\n",
2235                          ndlp->nlp_DID, ndlp->nlp_flag,
2236                          ndlp->nlp_state, ndlp->nlp_rpi);
2237         if (NLP_CHK_FREE_REQ(ndlp)) {
2238                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_NODE,
2239                                 "0280 lpfc_cleanup_node: ndlp:x%p "
2240                                 "usgmap:x%x refcnt:%d\n",
2241                                 (void *)ndlp, ndlp->nlp_usg_map,
2242                                 atomic_read(&ndlp->kref.refcount));
2243                 lpfc_dequeue_node(vport, ndlp);
2244         } else {
2245                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_NODE,
2246                                 "0281 lpfc_cleanup_node: ndlp:x%p "
2247                                 "usgmap:x%x refcnt:%d\n",
2248                                 (void *)ndlp, ndlp->nlp_usg_map,
2249                                 atomic_read(&ndlp->kref.refcount));
2250                 lpfc_disable_node(vport, ndlp);
2251         }
2252
2253         /* cleanup any ndlp on mbox q waiting for reglogin cmpl */
2254         if ((mb = phba->sli.mbox_active)) {
2255                 if ((mb->mb.mbxCommand == MBX_REG_LOGIN64) &&
2256                    (ndlp == (struct lpfc_nodelist *) mb->context2)) {
2257                         mb->context2 = NULL;
2258                         mb->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
2259                 }
2260         }
2261
2262         spin_lock_irq(&phba->hbalock);
2263         list_for_each_entry_safe(mb, nextmb, &phba->sli.mboxq, list) {
2264                 if ((mb->mb.mbxCommand == MBX_REG_LOGIN64) &&
2265                     (ndlp == (struct lpfc_nodelist *) mb->context2)) {
2266                         mp = (struct lpfc_dmabuf *) (mb->context1);
2267                         if (mp) {
2268                                 __lpfc_mbuf_free(phba, mp->virt, mp->phys);
2269                                 kfree(mp);
2270                         }
2271                         list_del(&mb->list);
2272                         mempool_free(mb, phba->mbox_mem_pool);
2273                         /* We shall not invoke the lpfc_nlp_put to decrement
2274                          * the ndlp reference count as we are in the process
2275                          * of lpfc_nlp_release.
2276                          */
2277                 }
2278         }
2279         spin_unlock_irq(&phba->hbalock);
2280
2281         lpfc_els_abort(phba, ndlp);
2282
2283         spin_lock_irq(shost->host_lock);
2284         ndlp->nlp_flag &= ~NLP_DELAY_TMO;
2285         spin_unlock_irq(shost->host_lock);
2286
2287         ndlp->nlp_last_elscmd = 0;
2288         del_timer_sync(&ndlp->nlp_delayfunc);
2289
2290         list_del_init(&ndlp->els_retry_evt.evt_listp);
2291         list_del_init(&ndlp->dev_loss_evt.evt_listp);
2292
2293         lpfc_unreg_rpi(vport, ndlp);
2294
2295         return 0;
2296 }
2297
2298 /*
2299  * Check to see if we can free the nlp back to the freelist.
2300  * If we are in the middle of using the nlp in the discovery state
2301  * machine, defer the free till we reach the end of the state machine.
2302  */
2303 static void
2304 lpfc_nlp_remove(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
2305 {
2306         struct lpfc_hba  *phba = vport->phba;
2307         struct lpfc_rport_data *rdata;
2308         LPFC_MBOXQ_t *mbox;
2309         int rc;
2310
2311         lpfc_cancel_retry_delay_tmo(vport, ndlp);
2312         if (ndlp->nlp_flag & NLP_DEFER_RM && !ndlp->nlp_rpi) {
2313                 /* For this case we need to cleanup the default rpi
2314                  * allocated by the firmware.
2315                  */
2316                 if ((mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL))
2317                         != NULL) {
2318                         rc = lpfc_reg_login(phba, vport->vpi, ndlp->nlp_DID,
2319                             (uint8_t *) &vport->fc_sparam, mbox, 0);
2320                         if (rc) {
2321                                 mempool_free(mbox, phba->mbox_mem_pool);
2322                         }
2323                         else {
2324                                 mbox->mbox_flag |= LPFC_MBX_IMED_UNREG;
2325                                 mbox->mbox_cmpl = lpfc_mbx_cmpl_dflt_rpi;
2326                                 mbox->vport = vport;
2327                                 mbox->context2 = NULL;
2328                                 rc =lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
2329                                 if (rc == MBX_NOT_FINISHED) {
2330                                         mempool_free(mbox, phba->mbox_mem_pool);
2331                                 }
2332                         }
2333                 }
2334         }
2335         lpfc_cleanup_node(vport, ndlp);
2336
2337         /*
2338          * We can get here with a non-NULL ndlp->rport because when we
2339          * unregister a rport we don't break the rport/node linkage.  So if we
2340          * do, make sure we don't leaving any dangling pointers behind.
2341          */
2342         if (ndlp->rport) {
2343                 rdata = ndlp->rport->dd_data;
2344                 rdata->pnode = NULL;
2345                 ndlp->rport = NULL;
2346         }
2347 }
2348
2349 static int
2350 lpfc_matchdid(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
2351               uint32_t did)
2352 {
2353         D_ID mydid, ndlpdid, matchdid;
2354
2355         if (did == Bcast_DID)
2356                 return 0;
2357
2358         /* First check for Direct match */
2359         if (ndlp->nlp_DID == did)
2360                 return 1;
2361
2362         /* Next check for area/domain identically equals 0 match */
2363         mydid.un.word = vport->fc_myDID;
2364         if ((mydid.un.b.domain == 0) && (mydid.un.b.area == 0)) {
2365                 return 0;
2366         }
2367
2368         matchdid.un.word = did;
2369         ndlpdid.un.word = ndlp->nlp_DID;
2370         if (matchdid.un.b.id == ndlpdid.un.b.id) {
2371                 if ((mydid.un.b.domain == matchdid.un.b.domain) &&
2372                     (mydid.un.b.area == matchdid.un.b.area)) {
2373                         if ((ndlpdid.un.b.domain == 0) &&
2374                             (ndlpdid.un.b.area == 0)) {
2375                                 if (ndlpdid.un.b.id)
2376                                         return 1;
2377                         }
2378                         return 0;
2379                 }
2380
2381                 matchdid.un.word = ndlp->nlp_DID;
2382                 if ((mydid.un.b.domain == ndlpdid.un.b.domain) &&
2383                     (mydid.un.b.area == ndlpdid.un.b.area)) {
2384                         if ((matchdid.un.b.domain == 0) &&
2385                             (matchdid.un.b.area == 0)) {
2386                                 if (matchdid.un.b.id)
2387                                         return 1;
2388                         }
2389                 }
2390         }
2391         return 0;
2392 }
2393
2394 /* Search for a nodelist entry */
2395 static struct lpfc_nodelist *
2396 __lpfc_findnode_did(struct lpfc_vport *vport, uint32_t did)
2397 {
2398         struct lpfc_nodelist *ndlp;
2399         uint32_t data1;
2400
2401         list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
2402                 if (lpfc_matchdid(vport, ndlp, did)) {
2403                         data1 = (((uint32_t) ndlp->nlp_state << 24) |
2404                                  ((uint32_t) ndlp->nlp_xri << 16) |
2405                                  ((uint32_t) ndlp->nlp_type << 8) |
2406                                  ((uint32_t) ndlp->nlp_rpi & 0xff));
2407                         lpfc_printf_vlog(vport, KERN_INFO, LOG_NODE,
2408                                          "0929 FIND node DID "
2409                                          "Data: x%p x%x x%x x%x\n",
2410                                          ndlp, ndlp->nlp_DID,
2411                                          ndlp->nlp_flag, data1);
2412                         return ndlp;
2413                 }
2414         }
2415
2416         /* FIND node did <did> NOT FOUND */
2417         lpfc_printf_vlog(vport, KERN_INFO, LOG_NODE,
2418                          "0932 FIND node did x%x NOT FOUND.\n", did);
2419         return NULL;
2420 }
2421
2422 struct lpfc_nodelist *
2423 lpfc_findnode_did(struct lpfc_vport *vport, uint32_t did)
2424 {
2425         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
2426         struct lpfc_nodelist *ndlp;
2427
2428         spin_lock_irq(shost->host_lock);
2429         ndlp = __lpfc_findnode_did(vport, did);
2430         spin_unlock_irq(shost->host_lock);
2431         return ndlp;
2432 }
2433
2434 struct lpfc_nodelist *
2435 lpfc_setup_disc_node(struct lpfc_vport *vport, uint32_t did)
2436 {
2437         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
2438         struct lpfc_nodelist *ndlp;
2439
2440         ndlp = lpfc_findnode_did(vport, did);
2441         if (!ndlp) {
2442                 if ((vport->fc_flag & FC_RSCN_MODE) != 0 &&
2443                     lpfc_rscn_payload_check(vport, did) == 0)
2444                         return NULL;
2445                 ndlp = (struct lpfc_nodelist *)
2446                      mempool_alloc(vport->phba->nlp_mem_pool, GFP_KERNEL);
2447                 if (!ndlp)
2448                         return NULL;
2449                 lpfc_nlp_init(vport, ndlp, did);
2450                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
2451                 spin_lock_irq(shost->host_lock);
2452                 ndlp->nlp_flag |= NLP_NPR_2B_DISC;
2453                 spin_unlock_irq(shost->host_lock);
2454                 return ndlp;
2455         } else if (!NLP_CHK_NODE_ACT(ndlp)) {
2456                 ndlp = lpfc_enable_node(vport, ndlp, NLP_STE_NPR_NODE);
2457                 if (!ndlp)
2458                         return NULL;
2459                 spin_lock_irq(shost->host_lock);
2460                 ndlp->nlp_flag |= NLP_NPR_2B_DISC;
2461                 spin_unlock_irq(shost->host_lock);
2462                 return ndlp;
2463         }
2464
2465         if ((vport->fc_flag & FC_RSCN_MODE) &&
2466             !(vport->fc_flag & FC_NDISC_ACTIVE)) {
2467                 if (lpfc_rscn_payload_check(vport, did)) {
2468                         /* If we've already recieved a PLOGI from this NPort
2469                          * we don't need to try to discover it again.
2470                          */
2471                         if (ndlp->nlp_flag & NLP_RCV_PLOGI)
2472                                 return NULL;
2473
2474                         /* Since this node is marked for discovery,
2475                          * delay timeout is not needed.
2476                          */
2477                         lpfc_cancel_retry_delay_tmo(vport, ndlp);
2478                         spin_lock_irq(shost->host_lock);
2479                         ndlp->nlp_flag |= NLP_NPR_2B_DISC;
2480                         spin_unlock_irq(shost->host_lock);
2481                 } else
2482                         ndlp = NULL;
2483         } else {
2484                 /* If we've already recieved a PLOGI from this NPort,
2485                  * or we are already in the process of discovery on it,
2486                  * we don't need to try to discover it again.
2487                  */
2488                 if (ndlp->nlp_state == NLP_STE_ADISC_ISSUE ||
2489                     ndlp->nlp_state == NLP_STE_PLOGI_ISSUE ||
2490                     ndlp->nlp_flag & NLP_RCV_PLOGI)
2491                         return NULL;
2492                 lpfc_nlp_set_state(vport, ndlp, NLP_STE_NPR_NODE);
2493                 spin_lock_irq(shost->host_lock);
2494                 ndlp->nlp_flag |= NLP_NPR_2B_DISC;
2495                 spin_unlock_irq(shost->host_lock);
2496         }
2497         return ndlp;
2498 }
2499
2500 /* Build a list of nodes to discover based on the loopmap */
2501 void
2502 lpfc_disc_list_loopmap(struct lpfc_vport *vport)
2503 {
2504         struct lpfc_hba  *phba = vport->phba;
2505         int j;
2506         uint32_t alpa, index;
2507
2508         if (!lpfc_is_link_up(phba))
2509                 return;
2510
2511         if (phba->fc_topology != TOPOLOGY_LOOP)
2512                 return;
2513
2514         /* Check for loop map present or not */
2515         if (phba->alpa_map[0]) {
2516                 for (j = 1; j <= phba->alpa_map[0]; j++) {
2517                         alpa = phba->alpa_map[j];
2518                         if (((vport->fc_myDID & 0xff) == alpa) || (alpa == 0))
2519                                 continue;
2520                         lpfc_setup_disc_node(vport, alpa);
2521                 }
2522         } else {
2523                 /* No alpamap, so try all alpa's */
2524                 for (j = 0; j < FC_MAXLOOP; j++) {
2525                         /* If cfg_scan_down is set, start from highest
2526                          * ALPA (0xef) to lowest (0x1).
2527                          */
2528                         if (vport->cfg_scan_down)
2529                                 index = j;
2530                         else
2531                                 index = FC_MAXLOOP - j - 1;
2532                         alpa = lpfcAlpaArray[index];
2533                         if ((vport->fc_myDID & 0xff) == alpa)
2534                                 continue;
2535                         lpfc_setup_disc_node(vport, alpa);
2536                 }
2537         }
2538         return;
2539 }
2540
2541 void
2542 lpfc_issue_clear_la(struct lpfc_hba *phba, struct lpfc_vport *vport)
2543 {
2544         LPFC_MBOXQ_t *mbox;
2545         struct lpfc_sli *psli = &phba->sli;
2546         struct lpfc_sli_ring *extra_ring = &psli->ring[psli->extra_ring];
2547         struct lpfc_sli_ring *fcp_ring   = &psli->ring[psli->fcp_ring];
2548         struct lpfc_sli_ring *next_ring  = &psli->ring[psli->next_ring];
2549         int  rc;
2550
2551         /*
2552          * if it's not a physical port or if we already send
2553          * clear_la then don't send it.
2554          */
2555         if ((phba->link_state >= LPFC_CLEAR_LA) ||
2556             (vport->port_type != LPFC_PHYSICAL_PORT))
2557                 return;
2558
2559                         /* Link up discovery */
2560         if ((mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL)) != NULL) {
2561                 phba->link_state = LPFC_CLEAR_LA;
2562                 lpfc_clear_la(phba, mbox);
2563                 mbox->mbox_cmpl = lpfc_mbx_cmpl_clear_la;
2564                 mbox->vport = vport;
2565                 rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
2566                 if (rc == MBX_NOT_FINISHED) {
2567                         mempool_free(mbox, phba->mbox_mem_pool);
2568                         lpfc_disc_flush_list(vport);
2569                         extra_ring->flag &= ~LPFC_STOP_IOCB_EVENT;
2570                         fcp_ring->flag &= ~LPFC_STOP_IOCB_EVENT;
2571                         next_ring->flag &= ~LPFC_STOP_IOCB_EVENT;
2572                         phba->link_state = LPFC_HBA_ERROR;
2573                 }
2574         }
2575 }
2576
2577 /* Reg_vpi to tell firmware to resume normal operations */
2578 void
2579 lpfc_issue_reg_vpi(struct lpfc_hba *phba, struct lpfc_vport *vport)
2580 {
2581         LPFC_MBOXQ_t *regvpimbox;
2582
2583         regvpimbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
2584         if (regvpimbox) {
2585                 lpfc_reg_vpi(phba, vport->vpi, vport->fc_myDID, regvpimbox);
2586                 regvpimbox->mbox_cmpl = lpfc_mbx_cmpl_reg_vpi;
2587                 regvpimbox->vport = vport;
2588                 if (lpfc_sli_issue_mbox(phba, regvpimbox, MBX_NOWAIT)
2589                                         == MBX_NOT_FINISHED) {
2590                         mempool_free(regvpimbox, phba->mbox_mem_pool);
2591                 }
2592         }
2593 }
2594
2595 /* Start Link up / RSCN discovery on NPR nodes */
2596 void
2597 lpfc_disc_start(struct lpfc_vport *vport)
2598 {
2599         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
2600         struct lpfc_hba  *phba = vport->phba;
2601         uint32_t num_sent;
2602         uint32_t clear_la_pending;
2603         int did_changed;
2604
2605         if (!lpfc_is_link_up(phba))
2606                 return;
2607
2608         if (phba->link_state == LPFC_CLEAR_LA)
2609                 clear_la_pending = 1;
2610         else
2611                 clear_la_pending = 0;
2612
2613         if (vport->port_state < LPFC_VPORT_READY)
2614                 vport->port_state = LPFC_DISC_AUTH;
2615
2616         lpfc_set_disctmo(vport);
2617
2618         if (vport->fc_prevDID == vport->fc_myDID)
2619                 did_changed = 0;
2620         else
2621                 did_changed = 1;
2622
2623         vport->fc_prevDID = vport->fc_myDID;
2624         vport->num_disc_nodes = 0;
2625
2626         /* Start Discovery state <hba_state> */
2627         lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
2628                          "0202 Start Discovery hba state x%x "
2629                          "Data: x%x x%x x%x\n",
2630                          vport->port_state, vport->fc_flag, vport->fc_plogi_cnt,
2631                          vport->fc_adisc_cnt);
2632
2633         /* First do ADISCs - if any */
2634         num_sent = lpfc_els_disc_adisc(vport);
2635
2636         if (num_sent)
2637                 return;
2638
2639         /*
2640          * For SLI3, cmpl_reg_vpi will set port_state to READY, and
2641          * continue discovery.
2642          */
2643         if ((phba->sli3_options & LPFC_SLI3_NPIV_ENABLED) &&
2644             !(vport->fc_flag & FC_PT2PT) &&
2645             !(vport->fc_flag & FC_RSCN_MODE)) {
2646                 lpfc_issue_reg_vpi(phba, vport);
2647                 return;
2648         }
2649
2650         /*
2651          * For SLI2, we need to set port_state to READY and continue
2652          * discovery.
2653          */
2654         if (vport->port_state < LPFC_VPORT_READY && !clear_la_pending) {
2655                 /* If we get here, there is nothing to ADISC */
2656                 if (vport->port_type == LPFC_PHYSICAL_PORT)
2657                         lpfc_issue_clear_la(phba, vport);
2658
2659                 if (!(vport->fc_flag & FC_ABORT_DISCOVERY)) {
2660                         vport->num_disc_nodes = 0;
2661                         /* go thru NPR nodes and issue ELS PLOGIs */
2662                         if (vport->fc_npr_cnt)
2663                                 lpfc_els_disc_plogi(vport);
2664
2665                         if (!vport->num_disc_nodes) {
2666                                 spin_lock_irq(shost->host_lock);
2667                                 vport->fc_flag &= ~FC_NDISC_ACTIVE;
2668                                 spin_unlock_irq(shost->host_lock);
2669                                 lpfc_can_disctmo(vport);
2670                         }
2671                 }
2672                 vport->port_state = LPFC_VPORT_READY;
2673         } else {
2674                 /* Next do PLOGIs - if any */
2675                 num_sent = lpfc_els_disc_plogi(vport);
2676
2677                 if (num_sent)
2678                         return;
2679
2680                 if (vport->fc_flag & FC_RSCN_MODE) {
2681                         /* Check to see if more RSCNs came in while we
2682                          * were processing this one.
2683                          */
2684                         if ((vport->fc_rscn_id_cnt == 0) &&
2685                             (!(vport->fc_flag & FC_RSCN_DISCOVERY))) {
2686                                 spin_lock_irq(shost->host_lock);
2687                                 vport->fc_flag &= ~FC_RSCN_MODE;
2688                                 spin_unlock_irq(shost->host_lock);
2689                                 lpfc_can_disctmo(vport);
2690                         } else
2691                                 lpfc_els_handle_rscn(vport);
2692                 }
2693         }
2694         return;
2695 }
2696
2697 /*
2698  *  Ignore completion for all IOCBs on tx and txcmpl queue for ELS
2699  *  ring the match the sppecified nodelist.
2700  */
2701 static void
2702 lpfc_free_tx(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp)
2703 {
2704         LIST_HEAD(completions);
2705         struct lpfc_sli *psli;
2706         IOCB_t     *icmd;
2707         struct lpfc_iocbq    *iocb, *next_iocb;
2708         struct lpfc_sli_ring *pring;
2709
2710         psli = &phba->sli;
2711         pring = &psli->ring[LPFC_ELS_RING];
2712
2713         /* Error matching iocb on txq or txcmplq
2714          * First check the txq.
2715          */
2716         spin_lock_irq(&phba->hbalock);
2717         list_for_each_entry_safe(iocb, next_iocb, &pring->txq, list) {
2718                 if (iocb->context1 != ndlp) {
2719                         continue;
2720                 }
2721                 icmd = &iocb->iocb;
2722                 if ((icmd->ulpCommand == CMD_ELS_REQUEST64_CR) ||
2723                     (icmd->ulpCommand == CMD_XMIT_ELS_RSP64_CX)) {
2724
2725                         list_move_tail(&iocb->list, &completions);
2726                         pring->txq_cnt--;
2727                 }
2728         }
2729
2730         /* Next check the txcmplq */
2731         list_for_each_entry_safe(iocb, next_iocb, &pring->txcmplq, list) {
2732                 if (iocb->context1 != ndlp) {
2733                         continue;
2734                 }
2735                 icmd = &iocb->iocb;
2736                 if (icmd->ulpCommand == CMD_ELS_REQUEST64_CR ||
2737                     icmd->ulpCommand == CMD_XMIT_ELS_RSP64_CX) {
2738                         lpfc_sli_issue_abort_iotag(phba, pring, iocb);
2739                 }
2740         }
2741         spin_unlock_irq(&phba->hbalock);
2742
2743         /* Cancel all the IOCBs from the completions list */
2744         lpfc_sli_cancel_iocbs(phba, &completions, IOSTAT_LOCAL_REJECT,
2745                               IOERR_SLI_ABORTED);
2746 }
2747
2748 static void
2749 lpfc_disc_flush_list(struct lpfc_vport *vport)
2750 {
2751         struct lpfc_nodelist *ndlp, *next_ndlp;
2752         struct lpfc_hba *phba = vport->phba;
2753
2754         if (vport->fc_plogi_cnt || vport->fc_adisc_cnt) {
2755                 list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes,
2756                                          nlp_listp) {
2757                         if (!NLP_CHK_NODE_ACT(ndlp))
2758                                 continue;
2759                         if (ndlp->nlp_state == NLP_STE_PLOGI_ISSUE ||
2760                             ndlp->nlp_state == NLP_STE_ADISC_ISSUE) {
2761                                 lpfc_free_tx(phba, ndlp);
2762                         }
2763                 }
2764         }
2765 }
2766
2767 void
2768 lpfc_cleanup_discovery_resources(struct lpfc_vport *vport)
2769 {
2770         lpfc_els_flush_rscn(vport);
2771         lpfc_els_flush_cmd(vport);
2772         lpfc_disc_flush_list(vport);
2773 }
2774
2775 /*****************************************************************************/
2776 /*
2777  * NAME:     lpfc_disc_timeout
2778  *
2779  * FUNCTION: Fibre Channel driver discovery timeout routine.
2780  *
2781  * EXECUTION ENVIRONMENT: interrupt only
2782  *
2783  * CALLED FROM:
2784  *      Timer function
2785  *
2786  * RETURNS:
2787  *      none
2788  */
2789 /*****************************************************************************/
2790 void
2791 lpfc_disc_timeout(unsigned long ptr)
2792 {
2793         struct lpfc_vport *vport = (struct lpfc_vport *) ptr;
2794         struct lpfc_hba   *phba = vport->phba;
2795         uint32_t tmo_posted;
2796         unsigned long flags = 0;
2797
2798         if (unlikely(!phba))
2799                 return;
2800
2801         spin_lock_irqsave(&vport->work_port_lock, flags);
2802         tmo_posted = vport->work_port_events & WORKER_DISC_TMO;
2803         if (!tmo_posted)
2804                 vport->work_port_events |= WORKER_DISC_TMO;
2805         spin_unlock_irqrestore(&vport->work_port_lock, flags);
2806
2807         if (!tmo_posted)
2808                 lpfc_worker_wake_up(phba);
2809         return;
2810 }
2811
2812 static void
2813 lpfc_disc_timeout_handler(struct lpfc_vport *vport)
2814 {
2815         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
2816         struct lpfc_hba  *phba = vport->phba;
2817         struct lpfc_sli  *psli = &phba->sli;
2818         struct lpfc_nodelist *ndlp, *next_ndlp;
2819         LPFC_MBOXQ_t *initlinkmbox;
2820         int rc, clrlaerr = 0;
2821
2822         if (!(vport->fc_flag & FC_DISC_TMO))
2823                 return;
2824
2825         spin_lock_irq(shost->host_lock);
2826         vport->fc_flag &= ~FC_DISC_TMO;
2827         spin_unlock_irq(shost->host_lock);
2828
2829         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
2830                 "disc timeout:    state:x%x rtry:x%x flg:x%x",
2831                 vport->port_state, vport->fc_ns_retry, vport->fc_flag);
2832
2833         switch (vport->port_state) {
2834
2835         case LPFC_LOCAL_CFG_LINK:
2836         /* port_state is identically  LPFC_LOCAL_CFG_LINK while waiting for
2837          * FAN
2838          */
2839                                 /* FAN timeout */
2840                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_DISCOVERY,
2841                                  "0221 FAN timeout\n");
2842                 /* Start discovery by sending FLOGI, clean up old rpis */
2843                 list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes,
2844                                          nlp_listp) {
2845                         if (!NLP_CHK_NODE_ACT(ndlp))
2846                                 continue;
2847                         if (ndlp->nlp_state != NLP_STE_NPR_NODE)
2848                                 continue;
2849                         if (ndlp->nlp_type & NLP_FABRIC) {
2850                                 /* Clean up the ndlp on Fabric connections */
2851                                 lpfc_drop_node(vport, ndlp);
2852
2853                         } else if (!(ndlp->nlp_flag & NLP_NPR_ADISC)) {
2854                                 /* Fail outstanding IO now since device
2855                                  * is marked for PLOGI.
2856                                  */
2857                                 lpfc_unreg_rpi(vport, ndlp);
2858                         }
2859                 }
2860                 if (vport->port_state != LPFC_FLOGI) {
2861                         lpfc_initial_flogi(vport);
2862                         return;
2863                 }
2864                 break;
2865
2866         case LPFC_FDISC:
2867         case LPFC_FLOGI:
2868         /* port_state is identically LPFC_FLOGI while waiting for FLOGI cmpl */
2869                 /* Initial FLOGI timeout */
2870                 lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
2871                                  "0222 Initial %s timeout\n",
2872                                  vport->vpi ? "FDISC" : "FLOGI");
2873
2874                 /* Assume no Fabric and go on with discovery.
2875                  * Check for outstanding ELS FLOGI to abort.
2876                  */
2877
2878                 /* FLOGI failed, so just use loop map to make discovery list */
2879                 lpfc_disc_list_loopmap(vport);
2880
2881                 /* Start discovery */
2882                 lpfc_disc_start(vport);
2883                 break;
2884
2885         case LPFC_FABRIC_CFG_LINK:
2886         /* hba_state is identically LPFC_FABRIC_CFG_LINK while waiting for
2887            NameServer login */
2888                 lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
2889                                  "0223 Timeout while waiting for "
2890                                  "NameServer login\n");
2891                 /* Next look for NameServer ndlp */
2892                 ndlp = lpfc_findnode_did(vport, NameServer_DID);
2893                 if (ndlp && NLP_CHK_NODE_ACT(ndlp))
2894                         lpfc_els_abort(phba, ndlp);
2895
2896                 /* ReStart discovery */
2897                 goto restart_disc;
2898
2899         case LPFC_NS_QRY:
2900         /* Check for wait for NameServer Rsp timeout */
2901                 lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
2902                                  "0224 NameServer Query timeout "
2903                                  "Data: x%x x%x\n",
2904                                  vport->fc_ns_retry, LPFC_MAX_NS_RETRY);
2905
2906                 if (vport->fc_ns_retry < LPFC_MAX_NS_RETRY) {
2907                         /* Try it one more time */
2908                         vport->fc_ns_retry++;
2909                         rc = lpfc_ns_cmd(vport, SLI_CTNS_GID_FT,
2910                                          vport->fc_ns_retry, 0);
2911                         if (rc == 0)
2912                                 break;
2913                 }
2914                 vport->fc_ns_retry = 0;
2915
2916 restart_disc:
2917                 /*
2918                  * Discovery is over.
2919                  * set port_state to PORT_READY if SLI2.
2920                  * cmpl_reg_vpi will set port_state to READY for SLI3.
2921                  */
2922                 if (phba->sli3_options & LPFC_SLI3_NPIV_ENABLED)
2923                         lpfc_issue_reg_vpi(phba, vport);
2924                 else  { /* NPIV Not enabled */
2925                         lpfc_issue_clear_la(phba, vport);
2926                         vport->port_state = LPFC_VPORT_READY;
2927                 }
2928
2929                 /* Setup and issue mailbox INITIALIZE LINK command */
2930                 initlinkmbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
2931                 if (!initlinkmbox) {
2932                         lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
2933                                          "0206 Device Discovery "
2934                                          "completion error\n");
2935                         phba->link_state = LPFC_HBA_ERROR;
2936                         break;
2937                 }
2938
2939                 lpfc_linkdown(phba);
2940                 lpfc_init_link(phba, initlinkmbox, phba->cfg_topology,
2941                                phba->cfg_link_speed);
2942                 initlinkmbox->mb.un.varInitLnk.lipsr_AL_PA = 0;
2943                 initlinkmbox->vport = vport;
2944                 initlinkmbox->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
2945                 rc = lpfc_sli_issue_mbox(phba, initlinkmbox, MBX_NOWAIT);
2946                 lpfc_set_loopback_flag(phba);
2947                 if (rc == MBX_NOT_FINISHED)
2948                         mempool_free(initlinkmbox, phba->mbox_mem_pool);
2949
2950                 break;
2951
2952         case LPFC_DISC_AUTH:
2953         /* Node Authentication timeout */
2954                 lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
2955                                  "0227 Node Authentication timeout\n");
2956                 lpfc_disc_flush_list(vport);
2957
2958                 /*
2959                  * set port_state to PORT_READY if SLI2.
2960                  * cmpl_reg_vpi will set port_state to READY for SLI3.
2961                  */
2962                 if (phba->sli3_options & LPFC_SLI3_NPIV_ENABLED)
2963                         lpfc_issue_reg_vpi(phba, vport);
2964                 else {  /* NPIV Not enabled */
2965                         lpfc_issue_clear_la(phba, vport);
2966                         vport->port_state = LPFC_VPORT_READY;
2967                 }
2968                 break;
2969
2970         case LPFC_VPORT_READY:
2971                 if (vport->fc_flag & FC_RSCN_MODE) {
2972                         lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
2973                                          "0231 RSCN timeout Data: x%x "
2974                                          "x%x\n",
2975                                          vport->fc_ns_retry, LPFC_MAX_NS_RETRY);
2976
2977                         /* Cleanup any outstanding ELS commands */
2978                         lpfc_els_flush_cmd(vport);
2979
2980                         lpfc_els_flush_rscn(vport);
2981                         lpfc_disc_flush_list(vport);
2982                 }
2983                 break;
2984
2985         default:
2986                 lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
2987                                  "0273 Unexpected discovery timeout, "
2988                                  "vport State x%x\n", vport->port_state);
2989                 break;
2990         }
2991
2992         switch (phba->link_state) {
2993         case LPFC_CLEAR_LA:
2994                                 /* CLEAR LA timeout */
2995                 lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
2996                                  "0228 CLEAR LA timeout\n");
2997                 clrlaerr = 1;
2998                 break;
2999
3000         case LPFC_LINK_UP:
3001                 lpfc_issue_clear_la(phba, vport);
3002                 /* Drop thru */
3003         case LPFC_LINK_UNKNOWN:
3004         case LPFC_WARM_START:
3005         case LPFC_INIT_START:
3006         case LPFC_INIT_MBX_CMDS:
3007         case LPFC_LINK_DOWN:
3008         case LPFC_HBA_ERROR:
3009                 lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
3010                                  "0230 Unexpected timeout, hba link "
3011                                  "state x%x\n", phba->link_state);
3012                 clrlaerr = 1;
3013                 break;
3014
3015         case LPFC_HBA_READY:
3016                 break;
3017         }
3018
3019         if (clrlaerr) {
3020                 lpfc_disc_flush_list(vport);
3021                 psli->ring[(psli->extra_ring)].flag &= ~LPFC_STOP_IOCB_EVENT;
3022                 psli->ring[(psli->fcp_ring)].flag &= ~LPFC_STOP_IOCB_EVENT;
3023                 psli->ring[(psli->next_ring)].flag &= ~LPFC_STOP_IOCB_EVENT;
3024                 vport->port_state = LPFC_VPORT_READY;
3025         }
3026
3027         return;
3028 }
3029
3030 /*
3031  * This routine handles processing a NameServer REG_LOGIN mailbox
3032  * command upon completion. It is setup in the LPFC_MBOXQ
3033  * as the completion routine when the command is
3034  * handed off to the SLI layer.
3035  */
3036 void
3037 lpfc_mbx_cmpl_fdmi_reg_login(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
3038 {
3039         MAILBOX_t *mb = &pmb->mb;
3040         struct lpfc_dmabuf   *mp = (struct lpfc_dmabuf *) (pmb->context1);
3041         struct lpfc_nodelist *ndlp = (struct lpfc_nodelist *) pmb->context2;
3042         struct lpfc_vport    *vport = pmb->vport;
3043
3044         pmb->context1 = NULL;
3045
3046         ndlp->nlp_rpi = mb->un.varWords[0];
3047         ndlp->nlp_type |= NLP_FABRIC;
3048         lpfc_nlp_set_state(vport, ndlp, NLP_STE_UNMAPPED_NODE);
3049
3050         /*
3051          * Start issuing Fabric-Device Management Interface (FDMI) command to
3052          * 0xfffffa (FDMI well known port) or Delay issuing FDMI command if
3053          * fdmi-on=2 (supporting RPA/hostnmae)
3054          */
3055
3056         if (vport->cfg_fdmi_on == 1)
3057                 lpfc_fdmi_cmd(vport, ndlp, SLI_MGMT_DHBA);
3058         else
3059                 mod_timer(&vport->fc_fdmitmo, jiffies + HZ * 60);
3060
3061         /* decrement the node reference count held for this callback
3062          * function.
3063          */
3064         lpfc_nlp_put(ndlp);
3065         lpfc_mbuf_free(phba, mp->virt, mp->phys);
3066         kfree(mp);
3067         mempool_free(pmb, phba->mbox_mem_pool);
3068
3069         return;
3070 }
3071
3072 static int
3073 lpfc_filter_by_rpi(struct lpfc_nodelist *ndlp, void *param)
3074 {
3075         uint16_t *rpi = param;
3076
3077         return ndlp->nlp_rpi == *rpi;
3078 }
3079
3080 static int
3081 lpfc_filter_by_wwpn(struct lpfc_nodelist *ndlp, void *param)
3082 {
3083         return memcmp(&ndlp->nlp_portname, param,
3084                       sizeof(ndlp->nlp_portname)) == 0;
3085 }
3086
3087 static struct lpfc_nodelist *
3088 __lpfc_find_node(struct lpfc_vport *vport, node_filter filter, void *param)
3089 {
3090         struct lpfc_nodelist *ndlp;
3091
3092         list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
3093                 if (filter(ndlp, param))
3094                         return ndlp;
3095         }
3096         return NULL;
3097 }
3098
3099 /*
3100  * This routine looks up the ndlp lists for the given RPI. If rpi found it
3101  * returns the node list element pointer else return NULL.
3102  */
3103 struct lpfc_nodelist *
3104 __lpfc_findnode_rpi(struct lpfc_vport *vport, uint16_t rpi)
3105 {
3106         return __lpfc_find_node(vport, lpfc_filter_by_rpi, &rpi);
3107 }
3108
3109 /*
3110  * This routine looks up the ndlp lists for the given WWPN. If WWPN found it
3111  * returns the node element list pointer else return NULL.
3112  */
3113 struct lpfc_nodelist *
3114 lpfc_findnode_wwpn(struct lpfc_vport *vport, struct lpfc_name *wwpn)
3115 {
3116         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
3117         struct lpfc_nodelist *ndlp;
3118
3119         spin_lock_irq(shost->host_lock);
3120         ndlp = __lpfc_find_node(vport, lpfc_filter_by_wwpn, wwpn);
3121         spin_unlock_irq(shost->host_lock);
3122         return ndlp;
3123 }
3124
3125 void
3126 lpfc_nlp_init(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
3127               uint32_t did)
3128 {
3129         memset(ndlp, 0, sizeof (struct lpfc_nodelist));
3130
3131         lpfc_initialize_node(vport, ndlp, did);
3132         INIT_LIST_HEAD(&ndlp->nlp_listp);
3133
3134         lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_NODE,
3135                 "node init:       did:x%x",
3136                 ndlp->nlp_DID, 0, 0);
3137
3138         return;
3139 }
3140
3141 /* This routine releases all resources associated with a specifc NPort's ndlp
3142  * and mempool_free's the nodelist.
3143  */
3144 static void
3145 lpfc_nlp_release(struct kref *kref)
3146 {
3147         struct lpfc_hba *phba;
3148         unsigned long flags;
3149         struct lpfc_nodelist *ndlp = container_of(kref, struct lpfc_nodelist,
3150                                                   kref);
3151
3152         lpfc_debugfs_disc_trc(ndlp->vport, LPFC_DISC_TRC_NODE,
3153                 "node release:    did:x%x flg:x%x type:x%x",
3154                 ndlp->nlp_DID, ndlp->nlp_flag, ndlp->nlp_type);
3155
3156         lpfc_printf_vlog(ndlp->vport, KERN_INFO, LOG_NODE,
3157                         "0279 lpfc_nlp_release: ndlp:x%p "
3158                         "usgmap:x%x refcnt:%d\n",
3159                         (void *)ndlp, ndlp->nlp_usg_map,
3160                         atomic_read(&ndlp->kref.refcount));
3161
3162         /* remove ndlp from action. */
3163         lpfc_nlp_remove(ndlp->vport, ndlp);
3164
3165         /* clear the ndlp active flag for all release cases */
3166         phba = ndlp->phba;
3167         spin_lock_irqsave(&phba->ndlp_lock, flags);
3168         NLP_CLR_NODE_ACT(ndlp);
3169         spin_unlock_irqrestore(&phba->ndlp_lock, flags);
3170
3171         /* free ndlp memory for final ndlp release */
3172         if (NLP_CHK_FREE_REQ(ndlp)) {
3173                 kfree(ndlp->lat_data);
3174                 mempool_free(ndlp, ndlp->phba->nlp_mem_pool);
3175         }
3176 }
3177
3178 /* This routine bumps the reference count for a ndlp structure to ensure
3179  * that one discovery thread won't free a ndlp while another discovery thread
3180  * is using it.
3181  */
3182 struct lpfc_nodelist *
3183 lpfc_nlp_get(struct lpfc_nodelist *ndlp)
3184 {
3185         struct lpfc_hba *phba;
3186         unsigned long flags;
3187
3188         if (ndlp) {
3189                 lpfc_debugfs_disc_trc(ndlp->vport, LPFC_DISC_TRC_NODE,
3190                         "node get:        did:x%x flg:x%x refcnt:x%x",
3191                         ndlp->nlp_DID, ndlp->nlp_flag,
3192                         atomic_read(&ndlp->kref.refcount));
3193                 /* The check of ndlp usage to prevent incrementing the
3194                  * ndlp reference count that is in the process of being
3195                  * released.
3196                  */
3197                 phba = ndlp->phba;
3198                 spin_lock_irqsave(&phba->ndlp_lock, flags);
3199                 if (!NLP_CHK_NODE_ACT(ndlp) || NLP_CHK_FREE_ACK(ndlp)) {
3200                         spin_unlock_irqrestore(&phba->ndlp_lock, flags);
3201                         lpfc_printf_vlog(ndlp->vport, KERN_WARNING, LOG_NODE,
3202                                 "0276 lpfc_nlp_get: ndlp:x%p "
3203                                 "usgmap:x%x refcnt:%d\n",
3204                                 (void *)ndlp, ndlp->nlp_usg_map,
3205                                 atomic_read(&ndlp->kref.refcount));
3206                         return NULL;
3207                 } else
3208                         kref_get(&ndlp->kref);
3209                 spin_unlock_irqrestore(&phba->ndlp_lock, flags);
3210         }
3211         return ndlp;
3212 }
3213
3214 /* This routine decrements the reference count for a ndlp structure. If the
3215  * count goes to 0, this indicates the the associated nodelist should be
3216  * freed. Returning 1 indicates the ndlp resource has been released; on the
3217  * other hand, returning 0 indicates the ndlp resource has not been released
3218  * yet.
3219  */
3220 int
3221 lpfc_nlp_put(struct lpfc_nodelist *ndlp)
3222 {
3223         struct lpfc_hba *phba;
3224         unsigned long flags;
3225
3226         if (!ndlp)
3227                 return 1;
3228
3229         lpfc_debugfs_disc_trc(ndlp->vport, LPFC_DISC_TRC_NODE,
3230         "node put:        did:x%x flg:x%x refcnt:x%x",
3231                 ndlp->nlp_DID, ndlp->nlp_flag,
3232                 atomic_read(&ndlp->kref.refcount));
3233         phba = ndlp->phba;
3234         spin_lock_irqsave(&phba->ndlp_lock, flags);
3235         /* Check the ndlp memory free acknowledge flag to avoid the
3236          * possible race condition that kref_put got invoked again
3237          * after previous one has done ndlp memory free.
3238          */
3239         if (NLP_CHK_FREE_ACK(ndlp)) {
3240                 spin_unlock_irqrestore(&phba->ndlp_lock, flags);
3241                 lpfc_printf_vlog(ndlp->vport, KERN_WARNING, LOG_NODE,
3242                                 "0274 lpfc_nlp_put: ndlp:x%p "
3243                                 "usgmap:x%x refcnt:%d\n",
3244                                 (void *)ndlp, ndlp->nlp_usg_map,
3245                                 atomic_read(&ndlp->kref.refcount));
3246                 return 1;
3247         }
3248         /* Check the ndlp inactivate log flag to avoid the possible
3249          * race condition that kref_put got invoked again after ndlp
3250          * is already in inactivating state.
3251          */
3252         if (NLP_CHK_IACT_REQ(ndlp)) {
3253                 spin_unlock_irqrestore(&phba->ndlp_lock, flags);
3254                 lpfc_printf_vlog(ndlp->vport, KERN_WARNING, LOG_NODE,
3255                                 "0275 lpfc_nlp_put: ndlp:x%p "
3256                                 "usgmap:x%x refcnt:%d\n",
3257                                 (void *)ndlp, ndlp->nlp_usg_map,
3258                                 atomic_read(&ndlp->kref.refcount));
3259                 return 1;
3260         }
3261         /* For last put, mark the ndlp usage flags to make sure no
3262          * other kref_get and kref_put on the same ndlp shall get
3263          * in between the process when the final kref_put has been
3264          * invoked on this ndlp.
3265          */
3266         if (atomic_read(&ndlp->kref.refcount) == 1) {
3267                 /* Indicate ndlp is put to inactive state. */
3268                 NLP_SET_IACT_REQ(ndlp);
3269                 /* Acknowledge ndlp memory free has been seen. */
3270                 if (NLP_CHK_FREE_REQ(ndlp))
3271                         NLP_SET_FREE_ACK(ndlp);
3272         }
3273         spin_unlock_irqrestore(&phba->ndlp_lock, flags);
3274         /* Note, the kref_put returns 1 when decrementing a reference
3275          * count that was 1, it invokes the release callback function,
3276          * but it still left the reference count as 1 (not actually
3277          * performs the last decrementation). Otherwise, it actually
3278          * decrements the reference count and returns 0.
3279          */
3280         return kref_put(&ndlp->kref, lpfc_nlp_release);
3281 }
3282
3283 /* This routine free's the specified nodelist if it is not in use
3284  * by any other discovery thread. This routine returns 1 if the
3285  * ndlp has been freed. A return value of 0 indicates the ndlp is
3286  * not yet been released.
3287  */
3288 int
3289 lpfc_nlp_not_used(struct lpfc_nodelist *ndlp)
3290 {
3291         lpfc_debugfs_disc_trc(ndlp->vport, LPFC_DISC_TRC_NODE,
3292                 "node not used:   did:x%x flg:x%x refcnt:x%x",
3293                 ndlp->nlp_DID, ndlp->nlp_flag,
3294                 atomic_read(&ndlp->kref.refcount));
3295         if (atomic_read(&ndlp->kref.refcount) == 1)
3296                 if (lpfc_nlp_put(ndlp))
3297                         return 1;
3298         return 0;
3299 }