drivers/scsi/bfa/bfad_im.c

   1 /*
   2  * Copyright (c) 2005-2009 Brocade Communications Systems, Inc.
   3  * All rights reserved
   4  * www.brocade.com
   5  *
   6  * Linux driver for Brocade Fibre Channel Host Bus Adapter.
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of the GNU General Public License (GPL) Version 2 as
  10  * published by the Free Software Foundation
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License for more details.
  16  */
  17
  18 /**
  19  *  bfad_im.c Linux driver IM module.
  20  */
  21
  22 #include "bfad_drv.h"
  23 #include "bfad_im.h"
  24 #include "bfad_trcmod.h"
  25 #include "bfa_cb_ioim_macros.h"
  26 #include <fcb/bfa_fcb_fcpim.h>
  27
  28 BFA_TRC_FILE(LDRV, IM);
  29
  30 DEFINE_IDR(bfad_im_port_index);
  31 struct scsi_transport_template *bfad_im_scsi_transport_template;
  32 static void bfad_im_itnim_work_handler(struct work_struct *work);
  33 static int bfad_im_queuecommand(struct scsi_cmnd *cmnd,
  34                 void (*done)(struct scsi_cmnd *));
  35 static int bfad_im_slave_alloc(struct scsi_device *sdev);
  36
  37 void
  38 bfa_cb_ioim_done(void *drv, struct bfad_ioim_s *dio,
  39                         enum bfi_ioim_status io_status, u8 scsi_status,
  40                         int sns_len, u8 *sns_info, s32 residue)
  41 {
  42         struct scsi_cmnd *cmnd = (struct scsi_cmnd *)dio;
  43         struct bfad_s         *bfad = drv;
  44         struct bfad_itnim_data_s *itnim_data;
  45         struct bfad_itnim_s *itnim;
  46         u8         host_status = DID_OK;
  47
  48         switch (io_status) {
  49         case BFI_IOIM_STS_OK:
  50                 bfa_trc(bfad, scsi_status);
  51                 scsi_set_resid(cmnd, 0);
  52
  53                 if (sns_len > 0) {
  54                         bfa_trc(bfad, sns_len);
  55                         if (sns_len > SCSI_SENSE_BUFFERSIZE)
  56                                 sns_len = SCSI_SENSE_BUFFERSIZE;
  57                         memcpy(cmnd->sense_buffer, sns_info, sns_len);
  58                 }
  59                 if (residue > 0) {
  60                         bfa_trc(bfad, residue);
  61                         scsi_set_resid(cmnd, residue);
  62                         if (!sns_len && (scsi_status == SAM_STAT_GOOD) &&
  63                                 (scsi_bufflen(cmnd) - residue) <
  64                                         cmnd->underflow) {
  65                                 bfa_trc(bfad, 0);
  66                                 host_status = DID_ERROR;
  67                         }
  68                 }
  69                 cmnd->result = ScsiResult(host_status, scsi_status);
  70
  71                 break;
  72
  73         case BFI_IOIM_STS_ABORTED:
  74         case BFI_IOIM_STS_TIMEDOUT:
  75         case BFI_IOIM_STS_PATHTOV:
  76         default:
  77                 cmnd->result = ScsiResult(DID_ERROR, 0);
  78         }
  79
  80         /* Unmap DMA, if host is NULL, it means a scsi passthru cmd */
  81         if (cmnd->device->host != NULL)
  82                 scsi_dma_unmap(cmnd);
  83
  84         cmnd->host_scribble = NULL;
  85         bfa_trc(bfad, cmnd->result);
  86
  87         itnim_data = cmnd->device->hostdata;
  88         if (itnim_data) {
  89                 itnim = itnim_data->itnim;
  90                 if (!cmnd->result && itnim &&
  91                          (bfa_lun_queue_depth > cmnd->device->queue_depth)) {
  92                         /* Queue depth adjustment for good status completion */
  93                         bfad_os_ramp_up_qdepth(itnim, cmnd->device);
  94                 } else if (cmnd->result == SAM_STAT_TASK_SET_FULL && itnim) {
  95                         /* qfull handling */
  96                         bfad_os_handle_qfull(itnim, cmnd->device);
  97                 }
  98         }
  99
 100         cmnd->scsi_done(cmnd);
 101 }
 102
 103 void
 104 bfa_cb_ioim_good_comp(void *drv, struct bfad_ioim_s *dio)
 105 {
 106         struct scsi_cmnd *cmnd = (struct scsi_cmnd *)dio;
 107         struct bfad_itnim_data_s *itnim_data;
 108         struct bfad_itnim_s *itnim;
 109
 110         cmnd->result = ScsiResult(DID_OK, SCSI_STATUS_GOOD);
 111
 112         /* Unmap DMA, if host is NULL, it means a scsi passthru cmd */
 113         if (cmnd->device->host != NULL)
 114                 scsi_dma_unmap(cmnd);
 115
 116         cmnd->host_scribble = NULL;
 117
 118         /* Queue depth adjustment */
 119         if (bfa_lun_queue_depth > cmnd->device->queue_depth) {
 120                 itnim_data = cmnd->device->hostdata;
 121                 if (itnim_data) {
 122                         itnim = itnim_data->itnim;
 123                         if (itnim)
 124                                 bfad_os_ramp_up_qdepth(itnim, cmnd->device);
 125                 }
 126         }
 127
 128         cmnd->scsi_done(cmnd);
 129 }
 130
 131 void
 132 bfa_cb_ioim_abort(void *drv, struct bfad_ioim_s *dio)
 133 {
 134         struct scsi_cmnd *cmnd = (struct scsi_cmnd *)dio;
 135         struct bfad_s         *bfad = drv;
 136
 137         cmnd->result = ScsiResult(DID_ERROR, 0);
 138
 139         /* Unmap DMA, if host is NULL, it means a scsi passthru cmd */
 140         if (cmnd->device->host != NULL)
 141                 scsi_dma_unmap(cmnd);
 142
 143         bfa_trc(bfad, cmnd->result);
 144         cmnd->host_scribble = NULL;
 145 }
 146
 147 void
 148 bfa_cb_tskim_done(void *bfad, struct bfad_tskim_s *dtsk,
 149                    enum bfi_tskim_status tsk_status)
 150 {
 151         struct scsi_cmnd *cmnd = (struct scsi_cmnd *)dtsk;
 152         wait_queue_head_t *wq;
 153
 154         cmnd->SCp.Status |= tsk_status << 1;
 155         set_bit(IO_DONE_BIT, (unsigned long *)&cmnd->SCp.Status);
 156         wq = (wait_queue_head_t *) cmnd->SCp.ptr;
 157         cmnd->SCp.ptr = NULL;
 158
 159         if (wq)
 160                 wake_up(wq);
 161 }
 162
 163 void
 164 bfa_cb_ioim_resfree(void *drv)
 165 {
 166 }
 167
 168 /**
 169  *  Scsi_Host_template SCSI host template
 170  */
 171 /**
 172  * Scsi_Host template entry, returns BFAD PCI info.
 173  */
 174 static const char *
 175 bfad_im_info(struct Scsi_Host *shost)
 176 {
 177         static char     bfa_buf[256];
 178         struct bfad_im_port_s *im_port =
 179                         (struct bfad_im_port_s *) shost->hostdata[0];
 180         struct bfad_s         *bfad = im_port->bfad;
 181         char model[BFA_ADAPTER_MODEL_NAME_LEN];
 182
 183         bfa_get_adapter_model(&bfad->bfa, model);
 184
 185         memset(bfa_buf, 0, sizeof(bfa_buf));
 186         snprintf(bfa_buf, sizeof(bfa_buf),
 187                 "Brocade FC/FCOE Adapter, " "model: %s hwpath: %s driver: %s",
 188                 model, bfad->pci_name, BFAD_DRIVER_VERSION);
 189         return bfa_buf;
 190 }
 191
 192 /**
 193  * Scsi_Host template entry, aborts the specified SCSI command.
 194  *
 195  * Returns: SUCCESS or FAILED.
 196  */
 197 static int
 198 bfad_im_abort_handler(struct scsi_cmnd *cmnd)
 199 {
 200         struct Scsi_Host *shost = cmnd->device->host;
 201         struct bfad_im_port_s *im_port =
 202                         (struct bfad_im_port_s *) shost->hostdata[0];
 203         struct bfad_s         *bfad = im_port->bfad;
 204         struct bfa_ioim_s *hal_io;
 205         unsigned long   flags;
 206         u32        timeout;
 207         int             rc = FAILED;
 208
 209         spin_lock_irqsave(&bfad->bfad_lock, flags);
 210         hal_io = (struct bfa_ioim_s *) cmnd->host_scribble;
 211         if (!hal_io) {
 212                 /* IO has been completed, retrun success */
 213                 rc = SUCCESS;
 214                 goto out;
 215         }
 216         if (hal_io->dio != (struct bfad_ioim_s *) cmnd) {
 217                 rc = FAILED;
 218                 goto out;
 219         }
 220
 221         bfa_trc(bfad, hal_io->iotag);
 222         bfa_log(bfad->logmod, BFA_LOG_LINUX_SCSI_ABORT,
 223                 im_port->shost->host_no, cmnd, hal_io->iotag);
 224         bfa_ioim_abort(hal_io);
 225         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
 226
 227         /* Need to wait until the command get aborted */
 228         timeout = 10;
 229         while ((struct bfa_ioim_s *) cmnd->host_scribble == hal_io) {
 230                 set_current_state(TASK_UNINTERRUPTIBLE);
 231                 schedule_timeout(timeout);
 232                 if (timeout < 4 * HZ)
 233                         timeout *= 2;
 234         }
 235
 236         cmnd->scsi_done(cmnd);
 237         bfa_trc(bfad, hal_io->iotag);
 238         bfa_log(bfad->logmod, BFA_LOG_LINUX_SCSI_ABORT_COMP,
 239                 im_port->shost->host_no, cmnd, hal_io->iotag);
 240         return SUCCESS;
 241 out:
 242         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
 243         return rc;
 244 }
 245
 246 static bfa_status_t
 247 bfad_im_target_reset_send(struct bfad_s *bfad, struct scsi_cmnd *cmnd,
 248                      struct bfad_itnim_s *itnim)
 249 {
 250         struct bfa_tskim_s *tskim;
 251         struct bfa_itnim_s *bfa_itnim;
 252         bfa_status_t    rc = BFA_STATUS_OK;
 253
 254         bfa_itnim = bfa_fcs_itnim_get_halitn(&itnim->fcs_itnim);
 255         tskim = bfa_tskim_alloc(&bfad->bfa, (struct bfad_tskim_s *) cmnd);
 256         if (!tskim) {
 257                 BFA_DEV_PRINTF(bfad, BFA_ERR,
 258                                "target reset, fail to allocate tskim\n");
 259                 rc = BFA_STATUS_FAILED;
 260                 goto out;
 261         }
 262
 263         /*
 264          * Set host_scribble to NULL to avoid aborting a task command if
 265          * happens.
 266          */
 267         cmnd->host_scribble = NULL;
 268         cmnd->SCp.Status = 0;
 269         bfa_itnim = bfa_fcs_itnim_get_halitn(&itnim->fcs_itnim);
 270         bfa_tskim_start(tskim, bfa_itnim, (lun_t)0,
 271                             FCP_TM_TARGET_RESET, BFAD_TARGET_RESET_TMO);
 272 out:
 273         return rc;
 274 }
 275
 276 /**
 277  * Scsi_Host template entry, resets a LUN and abort its all commands.
 278  *
 279  * Returns: SUCCESS or FAILED.
 280  *
 281  */
 282 static int
 283 bfad_im_reset_lun_handler(struct scsi_cmnd *cmnd)
 284 {
 285         struct Scsi_Host *shost = cmnd->device->host;
 286         struct bfad_im_port_s *im_port =
 287                         (struct bfad_im_port_s *) shost->hostdata[0];
 288         struct bfad_itnim_data_s *itnim_data = cmnd->device->hostdata;
 289         struct bfad_s         *bfad = im_port->bfad;
 290         struct bfa_tskim_s *tskim;
 291         struct bfad_itnim_s   *itnim;
 292         struct bfa_itnim_s *bfa_itnim;
 293         DECLARE_WAIT_QUEUE_HEAD(wq);
 294         int             rc = SUCCESS;
 295         unsigned long   flags;
 296         enum bfi_tskim_status task_status;
 297
 298         spin_lock_irqsave(&bfad->bfad_lock, flags);
 299         itnim = itnim_data->itnim;
 300         if (!itnim) {
 301                 spin_unlock_irqrestore(&bfad->bfad_lock, flags);
 302                 rc = FAILED;
 303                 goto out;
 304         }
 305
 306         tskim = bfa_tskim_alloc(&bfad->bfa, (struct bfad_tskim_s *) cmnd);
 307         if (!tskim) {
 308                 BFA_DEV_PRINTF(bfad, BFA_ERR,
 309                                 "LUN reset, fail to allocate tskim");
 310                 spin_unlock_irqrestore(&bfad->bfad_lock, flags);
 311                 rc = FAILED;
 312                 goto out;
 313         }
 314
 315         /**
 316          * Set host_scribble to NULL to avoid aborting a task command
 317          * if happens.
 318          */
 319         cmnd->host_scribble = NULL;
 320         cmnd->SCp.ptr = (char *)&wq;
 321         cmnd->SCp.Status = 0;
 322         bfa_itnim = bfa_fcs_itnim_get_halitn(&itnim->fcs_itnim);
 323         bfa_tskim_start(tskim, bfa_itnim,
 324                             bfad_int_to_lun(cmnd->device->lun),
 325                             FCP_TM_LUN_RESET, BFAD_LUN_RESET_TMO);
 326         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
 327
 328         wait_event(wq, test_bit(IO_DONE_BIT,
 329                         (unsigned long *)&cmnd->SCp.Status));
 330
 331         task_status = cmnd->SCp.Status >> 1;
 332         if (task_status != BFI_TSKIM_STS_OK) {
 333                 BFA_DEV_PRINTF(bfad, BFA_ERR, "LUN reset failure, status: %d\n",
 334                                task_status);
 335                 rc = FAILED;
 336         }
 337
 338 out:
 339         return rc;
 340 }
 341
 342 /**
 343  * Scsi_Host template entry, resets the bus and abort all commands.
 344  */
 345 static int
 346 bfad_im_reset_bus_handler(struct scsi_cmnd *cmnd)
 347 {
 348         struct Scsi_Host *shost = cmnd->device->host;
 349         struct bfad_im_port_s *im_port =
 350                                 (struct bfad_im_port_s *) shost->hostdata[0];
 351         struct bfad_s         *bfad = im_port->bfad;
 352         struct bfad_itnim_s   *itnim;
 353         unsigned long   flags;
 354         u32        i, rc, err_cnt = 0;
 355         DECLARE_WAIT_QUEUE_HEAD(wq);
 356         enum bfi_tskim_status task_status;
 357
 358         spin_lock_irqsave(&bfad->bfad_lock, flags);
 359         for (i = 0; i < MAX_FCP_TARGET; i++) {
 360                 itnim = bfad_os_get_itnim(im_port, i);
 361                 if (itnim) {
 362                         cmnd->SCp.ptr = (char *)&wq;
 363                         rc = bfad_im_target_reset_send(bfad, cmnd, itnim);
 364                         if (rc != BFA_STATUS_OK) {
 365                                 err_cnt++;
 366                                 continue;
 367                         }
 368
 369                         /* wait target reset to complete */
 370                         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
 371                         wait_event(wq, test_bit(IO_DONE_BIT,
 372                                         (unsigned long *)&cmnd->SCp.Status));
 373                         spin_lock_irqsave(&bfad->bfad_lock, flags);
 374
 375                         task_status = cmnd->SCp.Status >> 1;
 376                         if (task_status != BFI_TSKIM_STS_OK) {
 377                                 BFA_DEV_PRINTF(bfad, BFA_ERR,
 378                                         "target reset failure,"
 379                                         " status: %d\n", task_status);
 380                                 err_cnt++;
 381                         }
 382                 }
 383         }
 384         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
 385
 386         if (err_cnt)
 387                 return FAILED;
 388
 389         return SUCCESS;
 390 }
 391
 392 /**
 393  * Scsi_Host template entry slave_destroy.
 394  */
 395 static void
 396 bfad_im_slave_destroy(struct scsi_device *sdev)
 397 {
 398         sdev->hostdata = NULL;
 399         return;
 400 }
 401
 402 /**
 403  *  BFA FCS itnim callbacks
 404  */
 405
 406 /**
 407  * BFA FCS itnim alloc callback, after successful PRLI
 408  * Context: Interrupt
 409  */
 410 void
 411 bfa_fcb_itnim_alloc(struct bfad_s *bfad, struct bfa_fcs_itnim_s **itnim,
 412                     struct bfad_itnim_s **itnim_drv)
 413 {
 414         *itnim_drv = kzalloc(sizeof(struct bfad_itnim_s), GFP_ATOMIC);
 415         if (*itnim_drv == NULL)
 416                 return;
 417
 418         (*itnim_drv)->im = bfad->im;
 419         *itnim = &(*itnim_drv)->fcs_itnim;
 420         (*itnim_drv)->state = ITNIM_STATE_NONE;
 421
 422         /*
 423          * Initiaze the itnim_work
 424          */
 425         INIT_WORK(&(*itnim_drv)->itnim_work, bfad_im_itnim_work_handler);
 426         bfad->bfad_flags |= BFAD_RPORT_ONLINE;
 427 }
 428
 429 /**
 430  * BFA FCS itnim free callback.
 431  * Context: Interrupt. bfad_lock is held
 432  */
 433 void
 434 bfa_fcb_itnim_free(struct bfad_s *bfad, struct bfad_itnim_s *itnim_drv)
 435 {
 436         struct bfad_port_s    *port;
 437         wwn_t wwpn;
 438         u32 fcid;
 439         char wwpn_str[32], fcid_str[16];
 440
 441         /* online to free state transtion should not happen */
 442         bfa_assert(itnim_drv->state != ITNIM_STATE_ONLINE);
 443
 444         itnim_drv->queue_work = 1;
 445         /* offline request is not yet done, use the same request to free */
 446         if (itnim_drv->state == ITNIM_STATE_OFFLINE_PENDING)
 447                 itnim_drv->queue_work = 0;
 448
 449         itnim_drv->state = ITNIM_STATE_FREE;
 450         port = bfa_fcs_itnim_get_drvport(&itnim_drv->fcs_itnim);
 451         itnim_drv->im_port = port->im_port;
 452         wwpn = bfa_fcs_itnim_get_pwwn(&itnim_drv->fcs_itnim);
 453         fcid = bfa_fcs_itnim_get_fcid(&itnim_drv->fcs_itnim);
 454         wwn2str(wwpn_str, wwpn);
 455         fcid2str(fcid_str, fcid);
 456         bfa_log(bfad->logmod, BFA_LOG_LINUX_ITNIM_FREE,
 457                 port->im_port->shost->host_no,
 458                 fcid_str, wwpn_str);
 459         bfad_os_itnim_process(itnim_drv);
 460 }
 461
 462 /**
 463  * BFA FCS itnim online callback.
 464  * Context: Interrupt. bfad_lock is held
 465  */
 466 void
 467 bfa_fcb_itnim_online(struct bfad_itnim_s *itnim_drv)
 468 {
 469         struct bfad_port_s    *port;
 470
 471         itnim_drv->bfa_itnim = bfa_fcs_itnim_get_halitn(&itnim_drv->fcs_itnim);
 472         port = bfa_fcs_itnim_get_drvport(&itnim_drv->fcs_itnim);
 473         itnim_drv->state = ITNIM_STATE_ONLINE;
 474         itnim_drv->queue_work = 1;
 475         itnim_drv->im_port = port->im_port;
 476         bfad_os_itnim_process(itnim_drv);
 477 }
 478
 479 /**
 480  * BFA FCS itnim offline callback.
 481  * Context: Interrupt. bfad_lock is held
 482  */
 483 void
 484 bfa_fcb_itnim_offline(struct bfad_itnim_s *itnim_drv)
 485 {
 486         struct bfad_port_s    *port;
 487         struct bfad_s *bfad;
 488
 489         port = bfa_fcs_itnim_get_drvport(&itnim_drv->fcs_itnim);
 490         bfad = port->bfad;
 491         if ((bfad->pport.flags & BFAD_PORT_DELETE) ||
 492                  (port->flags & BFAD_PORT_DELETE)) {
 493                 itnim_drv->state = ITNIM_STATE_OFFLINE;
 494                 return;
 495         }
 496         itnim_drv->im_port = port->im_port;
 497         itnim_drv->state = ITNIM_STATE_OFFLINE_PENDING;
 498         itnim_drv->queue_work = 1;
 499         bfad_os_itnim_process(itnim_drv);
 500 }
 501
 502 /**
 503  * BFA FCS itnim timeout callback.
 504  * Context: Interrupt. bfad_lock is held
 505  */
 506 void bfa_fcb_itnim_tov(struct bfad_itnim_s *itnim)
 507 {
 508         itnim->state = ITNIM_STATE_TIMEOUT;
 509 }
 510
 511 /**
 512  * Allocate a Scsi_Host for a port.
 513  */
 514 int
 515 bfad_im_scsi_host_alloc(struct bfad_s *bfad, struct bfad_im_port_s *im_port)
 516 {
 517         int error = 1;
 518
 519         if (!idr_pre_get(&bfad_im_port_index, GFP_KERNEL)) {
 520                 printk(KERN_WARNING "idr_pre_get failure\n");
 521                 goto out;
 522         }
 523
 524         error = idr_get_new(&bfad_im_port_index, im_port,
 525                                          &im_port->idr_id);
 526         if (error) {
 527                 printk(KERN_WARNING "idr_get_new failure\n");
 528                 goto out;
 529         }
 530
 531         im_port->shost = bfad_os_scsi_host_alloc(im_port, bfad);
 532         if (!im_port->shost) {
 533                 error = 1;
 534                 goto out_free_idr;
 535         }
 536
 537         im_port->shost->hostdata[0] = (unsigned long)im_port;
 538         im_port->shost->unique_id = im_port->idr_id;
 539         im_port->shost->this_id = -1;
 540         im_port->shost->max_id = MAX_FCP_TARGET;
 541         im_port->shost->max_lun = MAX_FCP_LUN;
 542         im_port->shost->max_cmd_len = 16;
 543         im_port->shost->can_queue = bfad->cfg_data.ioc_queue_depth;
 544         im_port->shost->transportt = bfad_im_scsi_transport_template;
 545
 546         error = bfad_os_scsi_add_host(im_port->shost, im_port, bfad);
 547         if (error) {
 548                 printk(KERN_WARNING "bfad_os_scsi_add_host failure %d\n",
 549                                                         error);
 550                 goto out_fc_rel;
 551         }
 552
 553         /* setup host fixed attribute if the lk supports */
 554         bfad_os_fc_host_init(im_port);
 555
 556         return 0;
 557
 558 out_fc_rel:
 559         scsi_host_put(im_port->shost);
 560 out_free_idr:
 561         idr_remove(&bfad_im_port_index, im_port->idr_id);
 562 out:
 563         return error;
 564 }
 565
 566 void
 567 bfad_im_scsi_host_free(struct bfad_s *bfad, struct bfad_im_port_s *im_port)
 568 {
 569         unsigned long flags;
 570
 571         bfa_trc(bfad, bfad->inst_no);
 572         bfa_log(bfad->logmod, BFA_LOG_LINUX_SCSI_HOST_FREE,
 573                         im_port->shost->host_no);
 574
 575         fc_remove_host(im_port->shost);
 576
 577         scsi_remove_host(im_port->shost);
 578         scsi_host_put(im_port->shost);
 579
 580         spin_lock_irqsave(&bfad->bfad_lock, flags);
 581         idr_remove(&bfad_im_port_index, im_port->idr_id);
 582         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
 583 }
 584
 585 static void
 586 bfad_im_port_delete_handler(struct work_struct *work)
 587 {
 588         struct bfad_im_port_s *im_port =
 589                 container_of(work, struct bfad_im_port_s, port_delete_work);
 590
 591         bfad_im_scsi_host_free(im_port->bfad, im_port);
 592         bfad_im_port_clean(im_port);
 593         kfree(im_port);
 594 }
 595
 596 bfa_status_t
 597 bfad_im_port_new(struct bfad_s *bfad, struct bfad_port_s *port)
 598 {
 599         int             rc = BFA_STATUS_OK;
 600         struct bfad_im_port_s *im_port;
 601
 602         im_port = kzalloc(sizeof(struct bfad_im_port_s), GFP_ATOMIC);
 603         if (im_port == NULL) {
 604                 rc = BFA_STATUS_ENOMEM;
 605                 goto ext;
 606         }
 607         port->im_port = im_port;
 608         im_port->port = port;
 609         im_port->bfad = bfad;
 610
 611         INIT_WORK(&im_port->port_delete_work, bfad_im_port_delete_handler);
 612         INIT_LIST_HEAD(&im_port->itnim_mapped_list);
 613         INIT_LIST_HEAD(&im_port->binding_list);
 614
 615 ext:
 616         return rc;
 617 }
 618
 619 void
 620 bfad_im_port_delete(struct bfad_s *bfad, struct bfad_port_s *port)
 621 {
 622         struct bfad_im_port_s *im_port = port->im_port;
 623
 624         queue_work(bfad->im->drv_workq,
 625                                 &im_port->port_delete_work);
 626 }
 627
 628 void
 629 bfad_im_port_clean(struct bfad_im_port_s *im_port)
 630 {
 631         struct bfad_fcp_binding *bp, *bp_new;
 632         unsigned long flags;
 633         struct bfad_s *bfad =  im_port->bfad;
 634
 635         spin_lock_irqsave(&bfad->bfad_lock, flags);
 636         list_for_each_entry_safe(bp, bp_new, &im_port->binding_list,
 637                                         list_entry) {
 638                 list_del(&bp->list_entry);
 639                 kfree(bp);
 640         }
 641
 642         /* the itnim_mapped_list must be empty at this time */
 643         bfa_assert(list_empty(&im_port->itnim_mapped_list));
 644
 645         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
 646 }
 647
 648 void
 649 bfad_im_port_online(struct bfad_s *bfad, struct bfad_port_s *port)
 650 {
 651 }
 652
 653 void
 654 bfad_im_port_offline(struct bfad_s *bfad, struct bfad_port_s *port)
 655 {
 656 }
 657
 658 bfa_status_t
 659 bfad_im_probe(struct bfad_s *bfad)
 660 {
 661         struct bfad_im_s      *im;
 662         bfa_status_t    rc = BFA_STATUS_OK;
 663
 664         im = kzalloc(sizeof(struct bfad_im_s), GFP_KERNEL);
 665         if (im == NULL) {
 666                 rc = BFA_STATUS_ENOMEM;
 667                 goto ext;
 668         }
 669
 670         bfad->im = im;
 671         im->bfad = bfad;
 672
 673         if (bfad_os_thread_workq(bfad) != BFA_STATUS_OK) {
 674                 kfree(im);
 675                 rc = BFA_STATUS_FAILED;
 676         }
 677
 678 ext:
 679         return rc;
 680 }
 681
 682 void
 683 bfad_im_probe_undo(struct bfad_s *bfad)
 684 {
 685         if (bfad->im) {
 686                 bfad_os_destroy_workq(bfad->im);
 687                 kfree(bfad->im);
 688                 bfad->im = NULL;
 689         }
 690 }
 691
 692
 693
 694
 695 int
 696 bfad_os_scsi_add_host(struct Scsi_Host *shost, struct bfad_im_port_s *im_port,
 697                         struct bfad_s *bfad)
 698 {
 699     struct device *dev;
 700
 701     if (im_port->port->pvb_type == BFAD_PORT_PHYS_BASE)
 702                 dev = &bfad->pcidev->dev;
 703     else
 704                 dev = &bfad->pport.im_port->shost->shost_gendev;
 705
 706     return scsi_add_host(shost, dev);
 707 }
 708
 709 struct Scsi_Host *
 710 bfad_os_scsi_host_alloc(struct bfad_im_port_s *im_port, struct bfad_s *bfad)
 711 {
 712         struct scsi_host_template *sht;
 713
 714         if (im_port->port->pvb_type == BFAD_PORT_PHYS_BASE)
 715                 sht = &bfad_im_scsi_host_template;
 716         else
 717                 sht = &bfad_im_vport_template;
 718
 719         sht->sg_tablesize = bfad->cfg_data.io_max_sge;
 720
 721         return scsi_host_alloc(sht, sizeof(unsigned long));
 722 }
 723
 724 void
 725 bfad_os_scsi_host_free(struct bfad_s *bfad, struct bfad_im_port_s *im_port)
 726 {
 727         flush_workqueue(bfad->im->drv_workq);
 728         bfad_im_scsi_host_free(im_port->bfad, im_port);
 729         bfad_im_port_clean(im_port);
 730         kfree(im_port);
 731 }
 732
 733 void
 734 bfad_os_destroy_workq(struct bfad_im_s *im)
 735 {
 736         if (im && im->drv_workq) {
 737                 destroy_workqueue(im->drv_workq);
 738                 im->drv_workq = NULL;
 739         }
 740 }
 741
 742 bfa_status_t
 743 bfad_os_thread_workq(struct bfad_s *bfad)
 744 {
 745         struct bfad_im_s      *im = bfad->im;
 746
 747         bfa_trc(bfad, 0);
 748         snprintf(im->drv_workq_name, BFAD_KOBJ_NAME_LEN, "bfad_wq_%d",
 749                  bfad->inst_no);
 750         im->drv_workq = create_singlethread_workqueue(im->drv_workq_name);
 751         if (!im->drv_workq)
 752                 return BFA_STATUS_FAILED;
 753
 754         return BFA_STATUS_OK;
 755 }
 756
 757 /**
 758  * Scsi_Host template entry.
 759  *
 760  * Description:
 761  * OS entry point to adjust the queue_depths on a per-device basis.
 762  * Called once per device during the bus scan.
 763  * Return non-zero if fails.
 764  */
 765 static int
 766 bfad_im_slave_configure(struct scsi_device *sdev)
 767 {
 768         if (sdev->tagged_supported)
 769                 scsi_activate_tcq(sdev, bfa_lun_queue_depth);
 770         else
 771                 scsi_deactivate_tcq(sdev, bfa_lun_queue_depth);
 772
 773         return 0;
 774 }
 775
 776 struct scsi_host_template bfad_im_scsi_host_template = {
 777         .module = THIS_MODULE,
 778         .name = BFAD_DRIVER_NAME,
 779         .info = bfad_im_info,
 780         .queuecommand = bfad_im_queuecommand,
 781         .eh_abort_handler = bfad_im_abort_handler,
 782         .eh_device_reset_handler = bfad_im_reset_lun_handler,
 783         .eh_bus_reset_handler = bfad_im_reset_bus_handler,
 784
 785         .slave_alloc = bfad_im_slave_alloc,
 786         .slave_configure = bfad_im_slave_configure,
 787         .slave_destroy = bfad_im_slave_destroy,
 788
 789         .this_id = -1,
 790         .sg_tablesize = BFAD_IO_MAX_SGE,
 791         .cmd_per_lun = 3,
 792         .use_clustering = ENABLE_CLUSTERING,
 793         .shost_attrs = bfad_im_host_attrs,
 794         .max_sectors = 0xFFFF,
 795 };
 796
 797 struct scsi_host_template bfad_im_vport_template = {
 798         .module = THIS_MODULE,
 799         .name = BFAD_DRIVER_NAME,
 800         .info = bfad_im_info,
 801         .queuecommand = bfad_im_queuecommand,
 802         .eh_abort_handler = bfad_im_abort_handler,
 803         .eh_device_reset_handler = bfad_im_reset_lun_handler,
 804         .eh_bus_reset_handler = bfad_im_reset_bus_handler,
 805
 806         .slave_alloc = bfad_im_slave_alloc,
 807         .slave_configure = bfad_im_slave_configure,
 808         .slave_destroy = bfad_im_slave_destroy,
 809
 810         .this_id = -1,
 811         .sg_tablesize = BFAD_IO_MAX_SGE,
 812         .cmd_per_lun = 3,
 813         .use_clustering = ENABLE_CLUSTERING,
 814         .shost_attrs = bfad_im_vport_attrs,
 815         .max_sectors = 0xFFFF,
 816 };
 817
 818 void
 819 bfad_im_probe_post(struct bfad_im_s *im)
 820 {
 821         flush_workqueue(im->drv_workq);
 822 }
 823
 824 bfa_status_t
 825 bfad_im_module_init(void)
 826 {
 827         bfad_im_scsi_transport_template =
 828                 fc_attach_transport(&bfad_im_fc_function_template);
 829         if (!bfad_im_scsi_transport_template)
 830                 return BFA_STATUS_ENOMEM;
 831
 832         return BFA_STATUS_OK;
 833 }
 834
 835 void
 836 bfad_im_module_exit(void)
 837 {
 838         if (bfad_im_scsi_transport_template)
 839                 fc_release_transport(bfad_im_scsi_transport_template);
 840 }
 841
 842 void
 843 bfad_os_itnim_process(struct bfad_itnim_s *itnim_drv)
 844 {
 845         struct bfad_im_s      *im = itnim_drv->im;
 846
 847         if (itnim_drv->queue_work)
 848                 queue_work(im->drv_workq, &itnim_drv->itnim_work);
 849 }
 850
 851 void
 852 bfad_os_ramp_up_qdepth(struct bfad_itnim_s *itnim, struct scsi_device *sdev)
 853 {
 854         struct scsi_device *tmp_sdev;
 855
 856         if (((jiffies - itnim->last_ramp_up_time) >
 857                 BFA_QUEUE_FULL_RAMP_UP_TIME * HZ) &&
 858                 ((jiffies - itnim->last_queue_full_time) >
 859                 BFA_QUEUE_FULL_RAMP_UP_TIME * HZ)) {
 860                 shost_for_each_device(tmp_sdev, sdev->host) {
 861                         if (bfa_lun_queue_depth > tmp_sdev->queue_depth) {
 862                                 if (tmp_sdev->id != sdev->id)
 863                                         continue;
 864                                 if (tmp_sdev->ordered_tags)
 865                                         scsi_adjust_queue_depth(tmp_sdev,
 866                                                 MSG_ORDERED_TAG,
 867                                                 tmp_sdev->queue_depth + 1);
 868                                 else
 869                                         scsi_adjust_queue_depth(tmp_sdev,
 870                                                 MSG_SIMPLE_TAG,
 871                                                 tmp_sdev->queue_depth + 1);
 872
 873                                 itnim->last_ramp_up_time = jiffies;
 874                         }
 875                 }
 876         }
 877 }
 878
 879 void
 880 bfad_os_handle_qfull(struct bfad_itnim_s *itnim, struct scsi_device *sdev)
 881 {
 882         struct scsi_device *tmp_sdev;
 883
 884         itnim->last_queue_full_time = jiffies;
 885
 886         shost_for_each_device(tmp_sdev, sdev->host) {
 887                 if (tmp_sdev->id != sdev->id)
 888                         continue;
 889                 scsi_track_queue_full(tmp_sdev, tmp_sdev->queue_depth - 1);
 890         }
 891 }
 892
 893
 894
 895
 896 struct bfad_itnim_s *
 897 bfad_os_get_itnim(struct bfad_im_port_s *im_port, int id)
 898 {
 899         struct bfad_itnim_s   *itnim = NULL;
 900
 901         /* Search the mapped list for this target ID */
 902         list_for_each_entry(itnim, &im_port->itnim_mapped_list, list_entry) {
 903                 if (id == itnim->scsi_tgt_id)
 904                         return itnim;
 905         }
 906
 907         return NULL;
 908 }
 909
 910 /**
 911  * Scsi_Host template entry slave_alloc
 912  */
 913 static int
 914 bfad_im_slave_alloc(struct scsi_device *sdev)
 915 {
 916         struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
 917
 918         if (!rport || fc_remote_port_chkready(rport))
 919                 return -ENXIO;
 920
 921         sdev->hostdata = rport->dd_data;
 922
 923         return 0;
 924 }
 925
 926 void
 927 bfad_os_fc_host_init(struct bfad_im_port_s *im_port)
 928 {
 929         struct Scsi_Host *host = im_port->shost;
 930         struct bfad_s         *bfad = im_port->bfad;
 931         struct bfad_port_s    *port = im_port->port;
 932         struct bfa_pport_attr_s pattr;
 933         char model[BFA_ADAPTER_MODEL_NAME_LEN];
 934         char fw_ver[BFA_VERSION_LEN];
 935
 936         fc_host_node_name(host) =
 937                 bfa_os_htonll((bfa_fcs_port_get_nwwn(port->fcs_port)));
 938         fc_host_port_name(host) =
 939                 bfa_os_htonll((bfa_fcs_port_get_pwwn(port->fcs_port)));
 940
 941         fc_host_supported_classes(host) = FC_COS_CLASS3;
 942
 943         memset(fc_host_supported_fc4s(host), 0,
 944                sizeof(fc_host_supported_fc4s(host)));
 945         if (bfad_supported_fc4s & (BFA_PORT_ROLE_FCP_IM | BFA_PORT_ROLE_FCP_TM))
 946                 /* For FCP type 0x08 */
 947                 fc_host_supported_fc4s(host)[2] = 1;
 948         if (bfad_supported_fc4s & BFA_PORT_ROLE_FCP_IPFC)
 949                 /* For LLC/SNAP type 0x05 */
 950                 fc_host_supported_fc4s(host)[3] = 0x20;
 951         /* For fibre channel services type 0x20 */
 952         fc_host_supported_fc4s(host)[7] = 1;
 953
 954         bfa_get_adapter_model(&bfad->bfa, model);
 955         bfa_get_adapter_fw_ver(&bfad->bfa, fw_ver);
 956         sprintf(fc_host_symbolic_name(host), "Brocade %s FV%s DV%s",
 957                 model, fw_ver, BFAD_DRIVER_VERSION);
 958
 959         fc_host_supported_speeds(host) = 0;
 960         fc_host_supported_speeds(host) |=
 961                 FC_PORTSPEED_8GBIT | FC_PORTSPEED_4GBIT | FC_PORTSPEED_2GBIT |
 962                 FC_PORTSPEED_1GBIT;
 963
 964         bfa_fcport_get_attr(&bfad->bfa, &pattr);
 965         fc_host_maxframe_size(host) = pattr.pport_cfg.maxfrsize;
 966 }
 967
 968 static void
 969 bfad_im_fc_rport_add(struct bfad_im_port_s *im_port, struct bfad_itnim_s *itnim)
 970 {
 971         struct fc_rport_identifiers rport_ids;
 972         struct fc_rport *fc_rport;
 973         struct bfad_itnim_data_s *itnim_data;
 974
 975         rport_ids.node_name =
 976                 bfa_os_htonll(bfa_fcs_itnim_get_nwwn(&itnim->fcs_itnim));
 977         rport_ids.port_name =
 978                 bfa_os_htonll(bfa_fcs_itnim_get_pwwn(&itnim->fcs_itnim));
 979         rport_ids.port_id =
 980                 bfa_os_hton3b(bfa_fcs_itnim_get_fcid(&itnim->fcs_itnim));
 981         rport_ids.roles = FC_RPORT_ROLE_UNKNOWN;
 982
 983         itnim->fc_rport = fc_rport =
 984                 fc_remote_port_add(im_port->shost, 0, &rport_ids);
 985
 986         if (!fc_rport)
 987                 return;
 988
 989         fc_rport->maxframe_size =
 990                 bfa_fcs_itnim_get_maxfrsize(&itnim->fcs_itnim);
 991         fc_rport->supported_classes = bfa_fcs_itnim_get_cos(&itnim->fcs_itnim);
 992
 993         itnim_data = fc_rport->dd_data;
 994         itnim_data->itnim = itnim;
 995
 996         rport_ids.roles |= FC_RPORT_ROLE_FCP_TARGET;
 997
 998         if (rport_ids.roles != FC_RPORT_ROLE_UNKNOWN)
 999                 fc_remote_port_rolechg(fc_rport, rport_ids.roles);
1000
1001         if ((fc_rport->scsi_target_id != -1)
1002             && (fc_rport->scsi_target_id < MAX_FCP_TARGET))
1003                 itnim->scsi_tgt_id = fc_rport->scsi_target_id;
1004
1005         return;
1006 }
1007
1008 /**
1009  * Work queue handler using FC transport service
1010 * Context: kernel
1011  */
1012 static void
1013 bfad_im_itnim_work_handler(struct work_struct *work)
1014 {
1015         struct bfad_itnim_s   *itnim = container_of(work, struct bfad_itnim_s,
1016                                                         itnim_work);
1017         struct bfad_im_s      *im = itnim->im;
1018         struct bfad_s         *bfad = im->bfad;
1019         struct bfad_im_port_s *im_port;
1020         unsigned long   flags;
1021         struct fc_rport *fc_rport;
1022         wwn_t wwpn;
1023         u32 fcid;
1024         char wwpn_str[32], fcid_str[16];
1025
1026         spin_lock_irqsave(&bfad->bfad_lock, flags);
1027         im_port = itnim->im_port;
1028         bfa_trc(bfad, itnim->state);
1029         switch (itnim->state) {
1030         case ITNIM_STATE_ONLINE:
1031                 if (!itnim->fc_rport) {
1032                         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
1033                         bfad_im_fc_rport_add(im_port, itnim);
1034                         spin_lock_irqsave(&bfad->bfad_lock, flags);
1035                         wwpn = bfa_fcs_itnim_get_pwwn(&itnim->fcs_itnim);
1036                         fcid = bfa_fcs_itnim_get_fcid(&itnim->fcs_itnim);
1037                         wwn2str(wwpn_str, wwpn);
1038                         fcid2str(fcid_str, fcid);
1039                         list_add_tail(&itnim->list_entry,
1040                                 &im_port->itnim_mapped_list);
1041                         bfa_log(bfad->logmod, BFA_LOG_LINUX_ITNIM_ONLINE,
1042                                 im_port->shost->host_no,
1043                                 itnim->scsi_tgt_id,
1044                                 fcid_str, wwpn_str);
1045                 } else {
1046                         printk(KERN_WARNING
1047                                 "%s: itnim %llx is already in online state\n",
1048                                 __func__,
1049                                 bfa_fcs_itnim_get_pwwn(&itnim->fcs_itnim));
1050                 }
1051
1052                 break;
1053         case ITNIM_STATE_OFFLINE_PENDING:
1054                 itnim->state = ITNIM_STATE_OFFLINE;
1055                 if (itnim->fc_rport) {
1056                         fc_rport = itnim->fc_rport;
1057                         ((struct bfad_itnim_data_s *)
1058                                 fc_rport->dd_data)->itnim = NULL;
1059                         itnim->fc_rport = NULL;
1060                         if (!(im_port->port->flags & BFAD_PORT_DELETE)) {
1061                                 spin_unlock_irqrestore(&bfad->bfad_lock, flags);
1062                                 fc_rport->dev_loss_tmo =
1063                                         bfa_fcpim_path_tov_get(&bfad->bfa) + 1;
1064                                 fc_remote_port_delete(fc_rport);
1065                                 spin_lock_irqsave(&bfad->bfad_lock, flags);
1066                         }
1067                         wwpn = bfa_fcs_itnim_get_pwwn(&itnim->fcs_itnim);
1068                         fcid = bfa_fcs_itnim_get_fcid(&itnim->fcs_itnim);
1069                         wwn2str(wwpn_str, wwpn);
1070                         fcid2str(fcid_str, fcid);
1071                         list_del(&itnim->list_entry);
1072                         bfa_log(bfad->logmod, BFA_LOG_LINUX_ITNIM_OFFLINE,
1073                                 im_port->shost->host_no,
1074                                 itnim->scsi_tgt_id,
1075                                 fcid_str, wwpn_str);
1076                 }
1077                 break;
1078         case ITNIM_STATE_FREE:
1079                 if (itnim->fc_rport) {
1080                         fc_rport = itnim->fc_rport;
1081                         ((struct bfad_itnim_data_s *)
1082                                 fc_rport->dd_data)->itnim = NULL;
1083                         itnim->fc_rport = NULL;
1084                         if (!(im_port->port->flags & BFAD_PORT_DELETE)) {
1085                                 spin_unlock_irqrestore(&bfad->bfad_lock, flags);
1086                                 fc_rport->dev_loss_tmo =
1087                                         bfa_fcpim_path_tov_get(&bfad->bfa) + 1;
1088                                 fc_remote_port_delete(fc_rport);
1089                                 spin_lock_irqsave(&bfad->bfad_lock, flags);
1090                         }
1091                         list_del(&itnim->list_entry);
1092                 }
1093
1094                 kfree(itnim);
1095                 break;
1096         default:
1097                 bfa_assert(0);
1098                 break;
1099         }
1100
1101         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
1102 }
1103
1104 /**
1105  * Scsi_Host template entry, queue a SCSI command to the BFAD.
1106  */
1107 static int
1108 bfad_im_queuecommand(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *))
1109 {
1110         struct bfad_im_port_s *im_port =
1111                 (struct bfad_im_port_s *) cmnd->device->host->hostdata[0];
1112         struct bfad_s         *bfad = im_port->bfad;
1113         struct bfad_itnim_data_s *itnim_data = cmnd->device->hostdata;
1114         struct bfad_itnim_s   *itnim;
1115         struct bfa_ioim_s *hal_io;
1116         unsigned long   flags;
1117         int             rc;
1118         s16        sg_cnt = 0;
1119         struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
1120
1121         rc = fc_remote_port_chkready(rport);
1122         if (rc) {
1123                 cmnd->result = rc;
1124                 done(cmnd);
1125                 return 0;
1126         }
1127
1128         sg_cnt = scsi_dma_map(cmnd);
1129
1130         if (sg_cnt < 0)
1131                 return SCSI_MLQUEUE_HOST_BUSY;
1132
1133         cmnd->scsi_done = done;
1134
1135         spin_lock_irqsave(&bfad->bfad_lock, flags);
1136         if (!(bfad->bfad_flags & BFAD_HAL_START_DONE)) {
1137                 printk(KERN_WARNING
1138                         "bfad%d, queuecommand %p %x failed, BFA stopped\n",
1139                        bfad->inst_no, cmnd, cmnd->cmnd[0]);
1140                 cmnd->result = ScsiResult(DID_NO_CONNECT, 0);
1141                 goto out_fail_cmd;
1142         }
1143
1144         itnim = itnim_data->itnim;
1145         if (!itnim) {
1146                 cmnd->result = ScsiResult(DID_IMM_RETRY, 0);
1147                 goto out_fail_cmd;
1148         }
1149
1150         hal_io = bfa_ioim_alloc(&bfad->bfa, (struct bfad_ioim_s *) cmnd,
1151                                     itnim->bfa_itnim, sg_cnt);
1152         if (!hal_io) {
1153                 printk(KERN_WARNING "hal_io failure\n");
1154                 spin_unlock_irqrestore(&bfad->bfad_lock, flags);
1155                 scsi_dma_unmap(cmnd);
1156                 return SCSI_MLQUEUE_HOST_BUSY;
1157         }
1158
1159         cmnd->host_scribble = (char *)hal_io;
1160         bfa_trc_fp(bfad, hal_io->iotag);
1161         bfa_ioim_start(hal_io);
1162         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
1163
1164         return 0;
1165
1166 out_fail_cmd:
1167         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
1168         scsi_dma_unmap(cmnd);
1169         if (done)
1170                 done(cmnd);
1171
1172         return 0;
1173 }
1174
1175 void
1176 bfad_os_rport_online_wait(struct bfad_s *bfad)
1177 {
1178         int i;
1179         int rport_delay = 10;
1180
1181         for (i = 0; !(bfad->bfad_flags & BFAD_PORT_ONLINE)
1182                  && i < bfa_linkup_delay; i++)
1183                 schedule_timeout_uninterruptible(HZ);
1184
1185         if (bfad->bfad_flags & BFAD_PORT_ONLINE) {
1186                 rport_delay = rport_delay < bfa_linkup_delay ?
1187                                  rport_delay : bfa_linkup_delay;
1188                 for (i = 0; !(bfad->bfad_flags & BFAD_RPORT_ONLINE)
1189                          && i < rport_delay; i++)
1190                         schedule_timeout_uninterruptible(HZ);
1191
1192                 if (rport_delay > 0 && (bfad->bfad_flags & BFAD_RPORT_ONLINE))
1193                         schedule_timeout_uninterruptible(rport_delay * HZ);
1194         }
1195 }
1196
1197 int
1198 bfad_os_get_linkup_delay(struct bfad_s *bfad)
1199 {
1200
1201         u8         nwwns = 0;
1202         wwn_t           *wwns;
1203         int             ldelay;
1204
1205         /*
1206          * Querying for the boot target port wwns
1207          * -- read from boot information in flash.
1208          * If nwwns > 0 => boot over SAN and set bfa_linkup_delay = 30
1209          * else => local boot machine set bfa_linkup_delay = 10
1210          */
1211
1212         bfa_iocfc_get_bootwwns(&bfad->bfa, &nwwns, &wwns);
1213
1214         if (nwwns > 0) {
1215                 /* If boot over SAN; linkup_delay = 30sec */
1216                 ldelay = 30;
1217         } else {
1218                 /* If local boot; linkup_delay = 10sec */
1219                 ldelay = 0;
1220         }
1221
1222         return ldelay;
1223 }
1224
1225