drivers/scsi/bfa/bfad_im.c

   1 /*
   2  * Copyright (c) 2005-2010 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 "bfa_cb_ioim.h"
  25 #include "bfa_fcs.h"
  26
  27 BFA_TRC_FILE(LDRV, IM);
  28
  29 DEFINE_IDR(bfad_im_port_index);
  30 struct scsi_transport_template *bfad_im_scsi_transport_template;
  31 struct scsi_transport_template *bfad_im_scsi_vport_transport_template;
  32 static void bfad_im_itnim_work_handler(struct work_struct *work);
  33 static int bfad_im_queuecommand(struct Scsi_Host *h, struct scsi_cmnd *cmnd);
  34 static int bfad_im_slave_alloc(struct scsi_device *sdev);
  35 static void bfad_im_fc_rport_add(struct bfad_im_port_s  *im_port,
  36                                 struct bfad_itnim_s *itnim);
  37
  38 void
  39 bfa_cb_ioim_done(void *drv, struct bfad_ioim_s *dio,
  40                         enum bfi_ioim_status io_status, u8 scsi_status,
  41                         int sns_len, u8 *sns_info, s32 residue)
  42 {
  43         struct scsi_cmnd *cmnd = (struct scsi_cmnd *)dio;
  44         struct bfad_s         *bfad = drv;
  45         struct bfad_itnim_data_s *itnim_data;
  46         struct bfad_itnim_s *itnim;
  47         u8         host_status = DID_OK;
  48
  49         switch (io_status) {
  50         case BFI_IOIM_STS_OK:
  51                 bfa_trc(bfad, scsi_status);
  52                 scsi_set_resid(cmnd, 0);
  53
  54                 if (sns_len > 0) {
  55                         bfa_trc(bfad, sns_len);
  56                         if (sns_len > SCSI_SENSE_BUFFERSIZE)
  57                                 sns_len = SCSI_SENSE_BUFFERSIZE;
  58                         memcpy(cmnd->sense_buffer, sns_info, sns_len);
  59                 }
  60
  61                 if (residue > 0) {
  62                         bfa_trc(bfad, residue);
  63                         scsi_set_resid(cmnd, residue);
  64                         if (!sns_len && (scsi_status == SAM_STAT_GOOD) &&
  65                                 (scsi_bufflen(cmnd) - residue) <
  66                                         cmnd->underflow) {
  67                                 bfa_trc(bfad, 0);
  68                                 host_status = DID_ERROR;
  69                         }
  70                 }
  71                 cmnd->result = ScsiResult(host_status, scsi_status);
  72
  73                 break;
  74
  75         case BFI_IOIM_STS_ABORTED:
  76         case BFI_IOIM_STS_TIMEDOUT:
  77         case BFI_IOIM_STS_PATHTOV:
  78         default:
  79                 host_status = DID_ERROR;
  80                 cmnd->result = ScsiResult(host_status, 0);
  81         }
  82
  83         /* Unmap DMA, if host is NULL, it means a scsi passthru cmd */
  84         if (cmnd->device->host != NULL)
  85                 scsi_dma_unmap(cmnd);
  86
  87         cmnd->host_scribble = NULL;
  88         bfa_trc(bfad, cmnd->result);
  89
  90         itnim_data = cmnd->device->hostdata;
  91         if (itnim_data) {
  92                 itnim = itnim_data->itnim;
  93                 if (!cmnd->result && itnim &&
  94                          (bfa_lun_queue_depth > cmnd->device->queue_depth)) {
  95                         /* Queue depth adjustment for good status completion */
  96                         bfad_os_ramp_up_qdepth(itnim, cmnd->device);
  97                 } else if (cmnd->result == SAM_STAT_TASK_SET_FULL && itnim) {
  98                         /* qfull handling */
  99                         bfad_os_handle_qfull(itnim, cmnd->device);
 100                 }
 101         }
 102
 103         cmnd->scsi_done(cmnd);
 104 }
 105
 106 void
 107 bfa_cb_ioim_good_comp(void *drv, struct bfad_ioim_s *dio)
 108 {
 109         struct scsi_cmnd *cmnd = (struct scsi_cmnd *)dio;
 110         struct bfad_itnim_data_s *itnim_data;
 111         struct bfad_itnim_s *itnim;
 112
 113         cmnd->result = ScsiResult(DID_OK, SCSI_STATUS_GOOD);
 114
 115         /* Unmap DMA, if host is NULL, it means a scsi passthru cmd */
 116         if (cmnd->device->host != NULL)
 117                 scsi_dma_unmap(cmnd);
 118
 119         cmnd->host_scribble = NULL;
 120
 121         /* Queue depth adjustment */
 122         if (bfa_lun_queue_depth > cmnd->device->queue_depth) {
 123                 itnim_data = cmnd->device->hostdata;
 124                 if (itnim_data) {
 125                         itnim = itnim_data->itnim;
 126                         if (itnim)
 127                                 bfad_os_ramp_up_qdepth(itnim, cmnd->device);
 128                 }
 129         }
 130
 131         cmnd->scsi_done(cmnd);
 132 }
 133
 134 void
 135 bfa_cb_ioim_abort(void *drv, struct bfad_ioim_s *dio)
 136 {
 137         struct scsi_cmnd *cmnd = (struct scsi_cmnd *)dio;
 138         struct bfad_s         *bfad = drv;
 139
 140         cmnd->result = ScsiResult(DID_ERROR, 0);
 141
 142         /* Unmap DMA, if host is NULL, it means a scsi passthru cmd */
 143         if (cmnd->device->host != NULL)
 144                 scsi_dma_unmap(cmnd);
 145
 146         bfa_trc(bfad, cmnd->result);
 147         cmnd->host_scribble = NULL;
 148 }
 149
 150 void
 151 bfa_cb_tskim_done(void *bfad, struct bfad_tskim_s *dtsk,
 152                    enum bfi_tskim_status tsk_status)
 153 {
 154         struct scsi_cmnd *cmnd = (struct scsi_cmnd *)dtsk;
 155         wait_queue_head_t *wq;
 156
 157         cmnd->SCp.Status |= tsk_status << 1;
 158         set_bit(IO_DONE_BIT, (unsigned long *)&cmnd->SCp.Status);
 159         wq = (wait_queue_head_t *) cmnd->SCp.ptr;
 160         cmnd->SCp.ptr = NULL;
 161
 162         if (wq)
 163                 wake_up(wq);
 164 }
 165
 166 /*
 167  *  Scsi_Host_template SCSI host template
 168  */
 169 /*
 170  * Scsi_Host template entry, returns BFAD PCI info.
 171  */
 172 static const char *
 173 bfad_im_info(struct Scsi_Host *shost)
 174 {
 175         static char     bfa_buf[256];
 176         struct bfad_im_port_s *im_port =
 177                         (struct bfad_im_port_s *) shost->hostdata[0];
 178         struct bfad_s *bfad = im_port->bfad;
 179         struct bfa_s *bfa = &bfad->bfa;
 180         struct bfa_ioc_s *ioc = &bfa->ioc;
 181         char model[BFA_ADAPTER_MODEL_NAME_LEN];
 182
 183         bfa_get_adapter_model(bfa, model);
 184
 185         memset(bfa_buf, 0, sizeof(bfa_buf));
 186         if (ioc->ctdev)
 187                 snprintf(bfa_buf, sizeof(bfa_buf),
 188                 "Brocade FCOE Adapter, " "model: %s hwpath: %s driver: %s",
 189                  model, bfad->pci_name, BFAD_DRIVER_VERSION);
 190         else
 191                 snprintf(bfa_buf, sizeof(bfa_buf),
 192                 "Brocade FC Adapter, " "model: %s hwpath: %s driver: %s",
 193                 model, bfad->pci_name, BFAD_DRIVER_VERSION);
 194
 195         return bfa_buf;
 196 }
 197
 198 /*
 199  * Scsi_Host template entry, aborts the specified SCSI command.
 200  *
 201  * Returns: SUCCESS or FAILED.
 202  */
 203 static int
 204 bfad_im_abort_handler(struct scsi_cmnd *cmnd)
 205 {
 206         struct Scsi_Host *shost = cmnd->device->host;
 207         struct bfad_im_port_s *im_port =
 208                         (struct bfad_im_port_s *) shost->hostdata[0];
 209         struct bfad_s         *bfad = im_port->bfad;
 210         struct bfa_ioim_s *hal_io;
 211         unsigned long   flags;
 212         u32        timeout;
 213         int             rc = FAILED;
 214
 215         spin_lock_irqsave(&bfad->bfad_lock, flags);
 216         hal_io = (struct bfa_ioim_s *) cmnd->host_scribble;
 217         if (!hal_io) {
 218                 /* IO has been completed, retrun success */
 219                 rc = SUCCESS;
 220                 goto out;
 221         }
 222         if (hal_io->dio != (struct bfad_ioim_s *) cmnd) {
 223                 rc = FAILED;
 224                 goto out;
 225         }
 226
 227         bfa_trc(bfad, hal_io->iotag);
 228         BFA_LOG(KERN_INFO, bfad, log_level, "scsi%d: abort cmnd %p iotag %x\n",
 229                 im_port->shost->host_no, cmnd, hal_io->iotag);
 230         (void) bfa_ioim_abort(hal_io);
 231         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
 232
 233         /* Need to wait until the command get aborted */
 234         timeout = 10;
 235         while ((struct bfa_ioim_s *) cmnd->host_scribble == hal_io) {
 236                 set_current_state(TASK_UNINTERRUPTIBLE);
 237                 schedule_timeout(timeout);
 238                 if (timeout < 4 * HZ)
 239                         timeout *= 2;
 240         }
 241
 242         cmnd->scsi_done(cmnd);
 243         bfa_trc(bfad, hal_io->iotag);
 244         BFA_LOG(KERN_INFO, bfad, log_level,
 245                 "scsi%d: complete abort 0x%p iotag 0x%x\n",
 246                 im_port->shost->host_no, cmnd, hal_io->iotag);
 247         return SUCCESS;
 248 out:
 249         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
 250         return rc;
 251 }
 252
 253 static bfa_status_t
 254 bfad_im_target_reset_send(struct bfad_s *bfad, struct scsi_cmnd *cmnd,
 255                      struct bfad_itnim_s *itnim)
 256 {
 257         struct bfa_tskim_s *tskim;
 258         struct bfa_itnim_s *bfa_itnim;
 259         bfa_status_t    rc = BFA_STATUS_OK;
 260
 261         tskim = bfa_tskim_alloc(&bfad->bfa, (struct bfad_tskim_s *) cmnd);
 262         if (!tskim) {
 263                 BFA_LOG(KERN_ERR, bfad, log_level,
 264                         "target reset, fail to allocate tskim\n");
 265                 rc = BFA_STATUS_FAILED;
 266                 goto out;
 267         }
 268
 269         /*
 270          * Set host_scribble to NULL to avoid aborting a task command if
 271          * happens.
 272          */
 273         cmnd->host_scribble = NULL;
 274         cmnd->SCp.Status = 0;
 275         bfa_itnim = bfa_fcs_itnim_get_halitn(&itnim->fcs_itnim);
 276         bfa_tskim_start(tskim, bfa_itnim, (lun_t)0,
 277                             FCP_TM_TARGET_RESET, BFAD_TARGET_RESET_TMO);
 278 out:
 279         return rc;
 280 }
 281
 282 /*
 283  * Scsi_Host template entry, resets a LUN and abort its all commands.
 284  *
 285  * Returns: SUCCESS or FAILED.
 286  *
 287  */
 288 static int
 289 bfad_im_reset_lun_handler(struct scsi_cmnd *cmnd)
 290 {
 291         struct Scsi_Host *shost = cmnd->device->host;
 292         struct bfad_im_port_s *im_port =
 293                         (struct bfad_im_port_s *) shost->hostdata[0];
 294         struct bfad_itnim_data_s *itnim_data = cmnd->device->hostdata;
 295         struct bfad_s         *bfad = im_port->bfad;
 296         struct bfa_tskim_s *tskim;
 297         struct bfad_itnim_s   *itnim;
 298         struct bfa_itnim_s *bfa_itnim;
 299         DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wq);
 300         int             rc = SUCCESS;
 301         unsigned long   flags;
 302         enum bfi_tskim_status task_status;
 303
 304         spin_lock_irqsave(&bfad->bfad_lock, flags);
 305         itnim = itnim_data->itnim;
 306         if (!itnim) {
 307                 spin_unlock_irqrestore(&bfad->bfad_lock, flags);
 308                 rc = FAILED;
 309                 goto out;
 310         }
 311
 312         tskim = bfa_tskim_alloc(&bfad->bfa, (struct bfad_tskim_s *) cmnd);
 313         if (!tskim) {
 314                 BFA_LOG(KERN_ERR, bfad, log_level,
 315                                 "LUN reset, fail to allocate tskim");
 316                 spin_unlock_irqrestore(&bfad->bfad_lock, flags);
 317                 rc = FAILED;
 318                 goto out;
 319         }
 320
 321         /*
 322          * Set host_scribble to NULL to avoid aborting a task command
 323          * if happens.
 324          */
 325         cmnd->host_scribble = NULL;
 326         cmnd->SCp.ptr = (char *)&wq;
 327         cmnd->SCp.Status = 0;
 328         bfa_itnim = bfa_fcs_itnim_get_halitn(&itnim->fcs_itnim);
 329         bfa_tskim_start(tskim, bfa_itnim,
 330                             bfad_int_to_lun(cmnd->device->lun),
 331                             FCP_TM_LUN_RESET, BFAD_LUN_RESET_TMO);
 332         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
 333
 334         wait_event(wq, test_bit(IO_DONE_BIT,
 335                         (unsigned long *)&cmnd->SCp.Status));
 336
 337         task_status = cmnd->SCp.Status >> 1;
 338         if (task_status != BFI_TSKIM_STS_OK) {
 339                 BFA_LOG(KERN_ERR, bfad, log_level,
 340                         "LUN reset failure, status: %d\n", task_status);
 341                 rc = FAILED;
 342         }
 343
 344 out:
 345         return rc;
 346 }
 347
 348 /*
 349  * Scsi_Host template entry, resets the bus and abort all commands.
 350  */
 351 static int
 352 bfad_im_reset_bus_handler(struct scsi_cmnd *cmnd)
 353 {
 354         struct Scsi_Host *shost = cmnd->device->host;
 355         struct bfad_im_port_s *im_port =
 356                                 (struct bfad_im_port_s *) shost->hostdata[0];
 357         struct bfad_s         *bfad = im_port->bfad;
 358         struct bfad_itnim_s   *itnim;
 359         unsigned long   flags;
 360         u32        i, rc, err_cnt = 0;
 361         DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wq);
 362         enum bfi_tskim_status task_status;
 363
 364         spin_lock_irqsave(&bfad->bfad_lock, flags);
 365         for (i = 0; i < MAX_FCP_TARGET; i++) {
 366                 itnim = bfad_os_get_itnim(im_port, i);
 367                 if (itnim) {
 368                         cmnd->SCp.ptr = (char *)&wq;
 369                         rc = bfad_im_target_reset_send(bfad, cmnd, itnim);
 370                         if (rc != BFA_STATUS_OK) {
 371                                 err_cnt++;
 372                                 continue;
 373                         }
 374
 375                         /* wait target reset to complete */
 376                         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
 377                         wait_event(wq, test_bit(IO_DONE_BIT,
 378                                         (unsigned long *)&cmnd->SCp.Status));
 379                         spin_lock_irqsave(&bfad->bfad_lock, flags);
 380
 381                         task_status = cmnd->SCp.Status >> 1;
 382                         if (task_status != BFI_TSKIM_STS_OK) {
 383                                 BFA_LOG(KERN_ERR, bfad, log_level,
 384                                         "target reset failure,"
 385                                         " status: %d\n", task_status);
 386                                 err_cnt++;
 387                         }
 388                 }
 389         }
 390         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
 391
 392         if (err_cnt)
 393                 return FAILED;
 394
 395         return SUCCESS;
 396 }
 397
 398 /*
 399  * Scsi_Host template entry slave_destroy.
 400  */
 401 static void
 402 bfad_im_slave_destroy(struct scsi_device *sdev)
 403 {
 404         sdev->hostdata = NULL;
 405         return;
 406 }
 407
 408 /*
 409  *  BFA FCS itnim callbacks
 410  */
 411
 412 /*
 413  * BFA FCS itnim alloc callback, after successful PRLI
 414  * Context: Interrupt
 415  */
 416 void
 417 bfa_fcb_itnim_alloc(struct bfad_s *bfad, struct bfa_fcs_itnim_s **itnim,
 418                     struct bfad_itnim_s **itnim_drv)
 419 {
 420         *itnim_drv = kzalloc(sizeof(struct bfad_itnim_s), GFP_ATOMIC);
 421         if (*itnim_drv == NULL)
 422                 return;
 423
 424         (*itnim_drv)->im = bfad->im;
 425         *itnim = &(*itnim_drv)->fcs_itnim;
 426         (*itnim_drv)->state = ITNIM_STATE_NONE;
 427
 428         /*
 429          * Initiaze the itnim_work
 430          */
 431         INIT_WORK(&(*itnim_drv)->itnim_work, bfad_im_itnim_work_handler);
 432         bfad->bfad_flags |= BFAD_RPORT_ONLINE;
 433 }
 434
 435 /*
 436  * BFA FCS itnim free callback.
 437  * Context: Interrupt. bfad_lock is held
 438  */
 439 void
 440 bfa_fcb_itnim_free(struct bfad_s *bfad, struct bfad_itnim_s *itnim_drv)
 441 {
 442         struct bfad_port_s    *port;
 443         wwn_t wwpn;
 444         u32 fcid;
 445         char wwpn_str[32], fcid_str[16];
 446         struct bfad_im_s        *im = itnim_drv->im;
 447
 448         /* online to free state transtion should not happen */
 449         bfa_assert(itnim_drv->state != ITNIM_STATE_ONLINE);
 450
 451         itnim_drv->queue_work = 1;
 452         /* offline request is not yet done, use the same request to free */
 453         if (itnim_drv->state == ITNIM_STATE_OFFLINE_PENDING)
 454                 itnim_drv->queue_work = 0;
 455
 456         itnim_drv->state = ITNIM_STATE_FREE;
 457         port = bfa_fcs_itnim_get_drvport(&itnim_drv->fcs_itnim);
 458         itnim_drv->im_port = port->im_port;
 459         wwpn = bfa_fcs_itnim_get_pwwn(&itnim_drv->fcs_itnim);
 460         fcid = bfa_fcs_itnim_get_fcid(&itnim_drv->fcs_itnim);
 461         wwn2str(wwpn_str, wwpn);
 462         fcid2str(fcid_str, fcid);
 463         BFA_LOG(KERN_INFO, bfad, log_level,
 464                 "ITNIM FREE scsi%d: FCID: %s WWPN: %s\n",
 465                 port->im_port->shost->host_no,
 466                 fcid_str, wwpn_str);
 467
 468         /* ITNIM processing */
 469         if (itnim_drv->queue_work)
 470                 queue_work(im->drv_workq, &itnim_drv->itnim_work);
 471 }
 472
 473 /*
 474  * BFA FCS itnim online callback.
 475  * Context: Interrupt. bfad_lock is held
 476  */
 477 void
 478 bfa_fcb_itnim_online(struct bfad_itnim_s *itnim_drv)
 479 {
 480         struct bfad_port_s    *port;
 481         struct bfad_im_s        *im = itnim_drv->im;
 482
 483         itnim_drv->bfa_itnim = bfa_fcs_itnim_get_halitn(&itnim_drv->fcs_itnim);
 484         port = bfa_fcs_itnim_get_drvport(&itnim_drv->fcs_itnim);
 485         itnim_drv->state = ITNIM_STATE_ONLINE;
 486         itnim_drv->queue_work = 1;
 487         itnim_drv->im_port = port->im_port;
 488
 489         /* ITNIM processing */
 490         if (itnim_drv->queue_work)
 491                 queue_work(im->drv_workq, &itnim_drv->itnim_work);
 492 }
 493
 494 /*
 495  * BFA FCS itnim offline callback.
 496  * Context: Interrupt. bfad_lock is held
 497  */
 498 void
 499 bfa_fcb_itnim_offline(struct bfad_itnim_s *itnim_drv)
 500 {
 501         struct bfad_port_s    *port;
 502         struct bfad_s *bfad;
 503         struct bfad_im_s        *im = itnim_drv->im;
 504
 505         port = bfa_fcs_itnim_get_drvport(&itnim_drv->fcs_itnim);
 506         bfad = port->bfad;
 507         if ((bfad->pport.flags & BFAD_PORT_DELETE) ||
 508                  (port->flags & BFAD_PORT_DELETE)) {
 509                 itnim_drv->state = ITNIM_STATE_OFFLINE;
 510                 return;
 511         }
 512         itnim_drv->im_port = port->im_port;
 513         itnim_drv->state = ITNIM_STATE_OFFLINE_PENDING;
 514         itnim_drv->queue_work = 1;
 515
 516         /* ITNIM processing */
 517         if (itnim_drv->queue_work)
 518                 queue_work(im->drv_workq, &itnim_drv->itnim_work);
 519 }
 520
 521 /*
 522  * Allocate a Scsi_Host for a port.
 523  */
 524 int
 525 bfad_im_scsi_host_alloc(struct bfad_s *bfad, struct bfad_im_port_s *im_port,
 526                         struct device *dev)
 527 {
 528         int error = 1;
 529
 530         mutex_lock(&bfad_mutex);
 531         if (!idr_pre_get(&bfad_im_port_index, GFP_KERNEL)) {
 532                 mutex_unlock(&bfad_mutex);
 533                 printk(KERN_WARNING "idr_pre_get failure\n");
 534                 goto out;
 535         }
 536
 537         error = idr_get_new(&bfad_im_port_index, im_port,
 538                                          &im_port->idr_id);
 539         if (error) {
 540                 mutex_unlock(&bfad_mutex);
 541                 printk(KERN_WARNING "idr_get_new failure\n");
 542                 goto out;
 543         }
 544
 545         mutex_unlock(&bfad_mutex);
 546
 547         im_port->shost = bfad_os_scsi_host_alloc(im_port, bfad);
 548         if (!im_port->shost) {
 549                 error = 1;
 550                 goto out_free_idr;
 551         }
 552
 553         im_port->shost->hostdata[0] = (unsigned long)im_port;
 554         im_port->shost->unique_id = im_port->idr_id;
 555         im_port->shost->this_id = -1;
 556         im_port->shost->max_id = MAX_FCP_TARGET;
 557         im_port->shost->max_lun = MAX_FCP_LUN;
 558         im_port->shost->max_cmd_len = 16;
 559         im_port->shost->can_queue = bfad->cfg_data.ioc_queue_depth;
 560         if (im_port->port->pvb_type == BFAD_PORT_PHYS_BASE)
 561                 im_port->shost->transportt = bfad_im_scsi_transport_template;
 562         else
 563                 im_port->shost->transportt =
 564                                 bfad_im_scsi_vport_transport_template;
 565
 566         error = scsi_add_host_with_dma(im_port->shost, dev, &bfad->pcidev->dev);
 567         if (error) {
 568                 printk(KERN_WARNING "scsi_add_host failure %d\n", error);
 569                 goto out_fc_rel;
 570         }
 571
 572         /* setup host fixed attribute if the lk supports */
 573         bfad_os_fc_host_init(im_port);
 574
 575         return 0;
 576
 577 out_fc_rel:
 578         scsi_host_put(im_port->shost);
 579         im_port->shost = NULL;
 580 out_free_idr:
 581         mutex_lock(&bfad_mutex);
 582         idr_remove(&bfad_im_port_index, im_port->idr_id);
 583         mutex_unlock(&bfad_mutex);
 584 out:
 585         return error;
 586 }
 587
 588 void
 589 bfad_im_scsi_host_free(struct bfad_s *bfad, struct bfad_im_port_s *im_port)
 590 {
 591         bfa_trc(bfad, bfad->inst_no);
 592         BFA_LOG(KERN_INFO, bfad, log_level, "Free scsi%d\n",
 593                         im_port->shost->host_no);
 594
 595         fc_remove_host(im_port->shost);
 596
 597         scsi_remove_host(im_port->shost);
 598         scsi_host_put(im_port->shost);
 599
 600         mutex_lock(&bfad_mutex);
 601         idr_remove(&bfad_im_port_index, im_port->idr_id);
 602         mutex_unlock(&bfad_mutex);
 603 }
 604
 605 static void
 606 bfad_im_port_delete_handler(struct work_struct *work)
 607 {
 608         struct bfad_im_port_s *im_port =
 609                 container_of(work, struct bfad_im_port_s, port_delete_work);
 610
 611         if (im_port->port->pvb_type != BFAD_PORT_PHYS_BASE) {
 612                 im_port->flags |= BFAD_PORT_DELETE;
 613                 fc_vport_terminate(im_port->fc_vport);
 614         }
 615 }
 616
 617 bfa_status_t
 618 bfad_im_port_new(struct bfad_s *bfad, struct bfad_port_s *port)
 619 {
 620         int             rc = BFA_STATUS_OK;
 621         struct bfad_im_port_s *im_port;
 622
 623         im_port = kzalloc(sizeof(struct bfad_im_port_s), GFP_ATOMIC);
 624         if (im_port == NULL) {
 625                 rc = BFA_STATUS_ENOMEM;
 626                 goto ext;
 627         }
 628         port->im_port = im_port;
 629         im_port->port = port;
 630         im_port->bfad = bfad;
 631
 632         INIT_WORK(&im_port->port_delete_work, bfad_im_port_delete_handler);
 633         INIT_LIST_HEAD(&im_port->itnim_mapped_list);
 634         INIT_LIST_HEAD(&im_port->binding_list);
 635
 636 ext:
 637         return rc;
 638 }
 639
 640 void
 641 bfad_im_port_delete(struct bfad_s *bfad, struct bfad_port_s *port)
 642 {
 643         struct bfad_im_port_s *im_port = port->im_port;
 644
 645         queue_work(bfad->im->drv_workq,
 646                                 &im_port->port_delete_work);
 647 }
 648
 649 void
 650 bfad_im_port_clean(struct bfad_im_port_s *im_port)
 651 {
 652         struct bfad_fcp_binding *bp, *bp_new;
 653         unsigned long flags;
 654         struct bfad_s *bfad =  im_port->bfad;
 655
 656         spin_lock_irqsave(&bfad->bfad_lock, flags);
 657         list_for_each_entry_safe(bp, bp_new, &im_port->binding_list,
 658                                         list_entry) {
 659                 list_del(&bp->list_entry);
 660                 kfree(bp);
 661         }
 662
 663         /* the itnim_mapped_list must be empty at this time */
 664         bfa_assert(list_empty(&im_port->itnim_mapped_list));
 665
 666         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
 667 }
 668
 669 bfa_status_t
 670 bfad_im_probe(struct bfad_s *bfad)
 671 {
 672         struct bfad_im_s      *im;
 673         bfa_status_t    rc = BFA_STATUS_OK;
 674
 675         im = kzalloc(sizeof(struct bfad_im_s), GFP_KERNEL);
 676         if (im == NULL) {
 677                 rc = BFA_STATUS_ENOMEM;
 678                 goto ext;
 679         }
 680
 681         bfad->im = im;
 682         im->bfad = bfad;
 683
 684         if (bfad_os_thread_workq(bfad) != BFA_STATUS_OK) {
 685                 kfree(im);
 686                 rc = BFA_STATUS_FAILED;
 687         }
 688
 689 ext:
 690         return rc;
 691 }
 692
 693 void
 694 bfad_im_probe_undo(struct bfad_s *bfad)
 695 {
 696         if (bfad->im) {
 697                 bfad_os_destroy_workq(bfad->im);
 698                 kfree(bfad->im);
 699                 bfad->im = NULL;
 700         }
 701 }
 702
 703 struct Scsi_Host *
 704 bfad_os_scsi_host_alloc(struct bfad_im_port_s *im_port, struct bfad_s *bfad)
 705 {
 706         struct scsi_host_template *sht;
 707
 708         if (im_port->port->pvb_type == BFAD_PORT_PHYS_BASE)
 709                 sht = &bfad_im_scsi_host_template;
 710         else
 711                 sht = &bfad_im_vport_template;
 712
 713         sht->sg_tablesize = bfad->cfg_data.io_max_sge;
 714
 715         return scsi_host_alloc(sht, sizeof(unsigned long));
 716 }
 717
 718 void
 719 bfad_os_scsi_host_free(struct bfad_s *bfad, struct bfad_im_port_s *im_port)
 720 {
 721         if (!(im_port->flags & BFAD_PORT_DELETE))
 722                 flush_workqueue(bfad->im->drv_workq);
 723         bfad_im_scsi_host_free(im_port->bfad, im_port);
 724         bfad_im_port_clean(im_port);
 725         kfree(im_port);
 726 }
 727
 728 void
 729 bfad_os_destroy_workq(struct bfad_im_s *im)
 730 {
 731         if (im && im->drv_workq) {
 732                 flush_workqueue(im->drv_workq);
 733                 destroy_workqueue(im->drv_workq);
 734                 im->drv_workq = NULL;
 735         }
 736 }
 737
 738 bfa_status_t
 739 bfad_os_thread_workq(struct bfad_s *bfad)
 740 {
 741         struct bfad_im_s      *im = bfad->im;
 742
 743         bfa_trc(bfad, 0);
 744         snprintf(im->drv_workq_name, KOBJ_NAME_LEN, "bfad_wq_%d",
 745                  bfad->inst_no);
 746         im->drv_workq = create_singlethread_workqueue(im->drv_workq_name);
 747         if (!im->drv_workq)
 748                 return BFA_STATUS_FAILED;
 749
 750         return BFA_STATUS_OK;
 751 }
 752
 753 /*
 754  * Scsi_Host template entry.
 755  *
 756  * Description:
 757  * OS entry point to adjust the queue_depths on a per-device basis.
 758  * Called once per device during the bus scan.
 759  * Return non-zero if fails.
 760  */
 761 static int
 762 bfad_im_slave_configure(struct scsi_device *sdev)
 763 {
 764         if (sdev->tagged_supported)
 765                 scsi_activate_tcq(sdev, bfa_lun_queue_depth);
 766         else
 767                 scsi_deactivate_tcq(sdev, bfa_lun_queue_depth);
 768
 769         return 0;
 770 }
 771
 772 struct scsi_host_template bfad_im_scsi_host_template = {
 773         .module = THIS_MODULE,
 774         .name = BFAD_DRIVER_NAME,
 775         .info = bfad_im_info,
 776         .queuecommand = bfad_im_queuecommand,
 777         .eh_abort_handler = bfad_im_abort_handler,
 778         .eh_device_reset_handler = bfad_im_reset_lun_handler,
 779         .eh_bus_reset_handler = bfad_im_reset_bus_handler,
 780
 781         .slave_alloc = bfad_im_slave_alloc,
 782         .slave_configure = bfad_im_slave_configure,
 783         .slave_destroy = bfad_im_slave_destroy,
 784
 785         .this_id = -1,
 786         .sg_tablesize = BFAD_IO_MAX_SGE,
 787         .cmd_per_lun = 3,
 788         .use_clustering = ENABLE_CLUSTERING,
 789         .shost_attrs = bfad_im_host_attrs,
 790         .max_sectors = 0xFFFF,
 791 };
 792
 793 struct scsi_host_template bfad_im_vport_template = {
 794         .module = THIS_MODULE,
 795         .name = BFAD_DRIVER_NAME,
 796         .info = bfad_im_info,
 797         .queuecommand = bfad_im_queuecommand,
 798         .eh_abort_handler = bfad_im_abort_handler,
 799         .eh_device_reset_handler = bfad_im_reset_lun_handler,
 800         .eh_bus_reset_handler = bfad_im_reset_bus_handler,
 801
 802         .slave_alloc = bfad_im_slave_alloc,
 803         .slave_configure = bfad_im_slave_configure,
 804         .slave_destroy = bfad_im_slave_destroy,
 805
 806         .this_id = -1,
 807         .sg_tablesize = BFAD_IO_MAX_SGE,
 808         .cmd_per_lun = 3,
 809         .use_clustering = ENABLE_CLUSTERING,
 810         .shost_attrs = bfad_im_vport_attrs,
 811         .max_sectors = 0xFFFF,
 812 };
 813
 814 bfa_status_t
 815 bfad_im_module_init(void)
 816 {
 817         bfad_im_scsi_transport_template =
 818                 fc_attach_transport(&bfad_im_fc_function_template);
 819         if (!bfad_im_scsi_transport_template)
 820                 return BFA_STATUS_ENOMEM;
 821
 822         bfad_im_scsi_vport_transport_template =
 823                 fc_attach_transport(&bfad_im_vport_fc_function_template);
 824         if (!bfad_im_scsi_vport_transport_template) {
 825                 fc_release_transport(bfad_im_scsi_transport_template);
 826                 return BFA_STATUS_ENOMEM;
 827         }
 828
 829         return BFA_STATUS_OK;
 830 }
 831
 832 void
 833 bfad_im_module_exit(void)
 834 {
 835         if (bfad_im_scsi_transport_template)
 836                 fc_release_transport(bfad_im_scsi_transport_template);
 837
 838         if (bfad_im_scsi_vport_transport_template)
 839                 fc_release_transport(bfad_im_scsi_vport_transport_template);
 840 }
 841
 842 void
 843 bfad_os_ramp_up_qdepth(struct bfad_itnim_s *itnim, struct scsi_device *sdev)
 844 {
 845         struct scsi_device *tmp_sdev;
 846
 847         if (((jiffies - itnim->last_ramp_up_time) >
 848                 BFA_QUEUE_FULL_RAMP_UP_TIME * HZ) &&
 849                 ((jiffies - itnim->last_queue_full_time) >
 850                 BFA_QUEUE_FULL_RAMP_UP_TIME * HZ)) {
 851                 shost_for_each_device(tmp_sdev, sdev->host) {
 852                         if (bfa_lun_queue_depth > tmp_sdev->queue_depth) {
 853                                 if (tmp_sdev->id != sdev->id)
 854                                         continue;
 855                                 if (tmp_sdev->ordered_tags)
 856                                         scsi_adjust_queue_depth(tmp_sdev,
 857                                                 MSG_ORDERED_TAG,
 858                                                 tmp_sdev->queue_depth + 1);
 859                                 else
 860                                         scsi_adjust_queue_depth(tmp_sdev,
 861                                                 MSG_SIMPLE_TAG,
 862                                                 tmp_sdev->queue_depth + 1);
 863
 864                                 itnim->last_ramp_up_time = jiffies;
 865                         }
 866                 }
 867         }
 868 }
 869
 870 void
 871 bfad_os_handle_qfull(struct bfad_itnim_s *itnim, struct scsi_device *sdev)
 872 {
 873         struct scsi_device *tmp_sdev;
 874
 875         itnim->last_queue_full_time = jiffies;
 876
 877         shost_for_each_device(tmp_sdev, sdev->host) {
 878                 if (tmp_sdev->id != sdev->id)
 879                         continue;
 880                 scsi_track_queue_full(tmp_sdev, tmp_sdev->queue_depth - 1);
 881         }
 882 }
 883
 884 struct bfad_itnim_s *
 885 bfad_os_get_itnim(struct bfad_im_port_s *im_port, int id)
 886 {
 887         struct bfad_itnim_s   *itnim = NULL;
 888
 889         /* Search the mapped list for this target ID */
 890         list_for_each_entry(itnim, &im_port->itnim_mapped_list, list_entry) {
 891                 if (id == itnim->scsi_tgt_id)
 892                         return itnim;
 893         }
 894
 895         return NULL;
 896 }
 897
 898 /*
 899  * Scsi_Host template entry slave_alloc
 900  */
 901 static int
 902 bfad_im_slave_alloc(struct scsi_device *sdev)
 903 {
 904         struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
 905
 906         if (!rport || fc_remote_port_chkready(rport))
 907                 return -ENXIO;
 908
 909         sdev->hostdata = rport->dd_data;
 910
 911         return 0;
 912 }
 913
 914 static u32
 915 bfad_im_supported_speeds(struct bfa_s *bfa)
 916 {
 917         struct bfa_ioc_attr_s *ioc_attr;
 918         u32 supported_speed = 0;
 919
 920         ioc_attr = kzalloc(sizeof(struct bfa_ioc_attr_s), GFP_KERNEL);
 921         if (!ioc_attr)
 922                 return 0;
 923
 924         bfa_get_attr(bfa, ioc_attr);
 925         if (ioc_attr->adapter_attr.max_speed == BFA_PORT_SPEED_8GBPS) {
 926                 if (ioc_attr->adapter_attr.is_mezz) {
 927                         supported_speed |= FC_PORTSPEED_8GBIT |
 928                                 FC_PORTSPEED_4GBIT |
 929                                 FC_PORTSPEED_2GBIT | FC_PORTSPEED_1GBIT;
 930                 } else {
 931                         supported_speed |= FC_PORTSPEED_8GBIT |
 932                                 FC_PORTSPEED_4GBIT |
 933                                 FC_PORTSPEED_2GBIT;
 934                 }
 935         } else if (ioc_attr->adapter_attr.max_speed == BFA_PORT_SPEED_4GBPS) {
 936                 supported_speed |=  FC_PORTSPEED_4GBIT | FC_PORTSPEED_2GBIT |
 937                                 FC_PORTSPEED_1GBIT;
 938         } else if (ioc_attr->adapter_attr.max_speed == BFA_PORT_SPEED_10GBPS) {
 939                 supported_speed |= FC_PORTSPEED_10GBIT;
 940         }
 941         kfree(ioc_attr);
 942         return supported_speed;
 943 }
 944
 945 void
 946 bfad_os_fc_host_init(struct bfad_im_port_s *im_port)
 947 {
 948         struct Scsi_Host *host = im_port->shost;
 949         struct bfad_s         *bfad = im_port->bfad;
 950         struct bfad_port_s    *port = im_port->port;
 951         char symname[BFA_SYMNAME_MAXLEN];
 952         struct bfa_fcport_s *fcport = BFA_FCPORT_MOD(&bfad->bfa);
 953
 954         fc_host_node_name(host) =
 955                 cpu_to_be64((bfa_fcs_lport_get_nwwn(port->fcs_port)));
 956         fc_host_port_name(host) =
 957                 cpu_to_be64((bfa_fcs_lport_get_pwwn(port->fcs_port)));
 958         fc_host_max_npiv_vports(host) = bfa_lps_get_max_vport(&bfad->bfa);
 959
 960         fc_host_supported_classes(host) = FC_COS_CLASS3;
 961
 962         memset(fc_host_supported_fc4s(host), 0,
 963                sizeof(fc_host_supported_fc4s(host)));
 964         if (supported_fc4s & BFA_LPORT_ROLE_FCP_IM)
 965                 /* For FCP type 0x08 */
 966                 fc_host_supported_fc4s(host)[2] = 1;
 967         /* For fibre channel services type 0x20 */
 968         fc_host_supported_fc4s(host)[7] = 1;
 969
 970         strncpy(symname, bfad->bfa_fcs.fabric.bport.port_cfg.sym_name.symname,
 971                 BFA_SYMNAME_MAXLEN);
 972         sprintf(fc_host_symbolic_name(host), "%s", symname);
 973
 974         fc_host_supported_speeds(host) = bfad_im_supported_speeds(&bfad->bfa);
 975         fc_host_maxframe_size(host) = fcport->cfg.maxfrsize;
 976 }
 977
 978 static void
 979 bfad_im_fc_rport_add(struct bfad_im_port_s *im_port, struct bfad_itnim_s *itnim)
 980 {
 981         struct fc_rport_identifiers rport_ids;
 982         struct fc_rport *fc_rport;
 983         struct bfad_itnim_data_s *itnim_data;
 984
 985         rport_ids.node_name =
 986                 cpu_to_be64(bfa_fcs_itnim_get_nwwn(&itnim->fcs_itnim));
 987         rport_ids.port_name =
 988                 cpu_to_be64(bfa_fcs_itnim_get_pwwn(&itnim->fcs_itnim));
 989         rport_ids.port_id =
 990                 bfa_os_hton3b(bfa_fcs_itnim_get_fcid(&itnim->fcs_itnim));
 991         rport_ids.roles = FC_RPORT_ROLE_UNKNOWN;
 992
 993         itnim->fc_rport = fc_rport =
 994                 fc_remote_port_add(im_port->shost, 0, &rport_ids);
 995
 996         if (!fc_rport)
 997                 return;
 998
 999         fc_rport->maxframe_size =
1000                 bfa_fcs_itnim_get_maxfrsize(&itnim->fcs_itnim);
1001         fc_rport->supported_classes = bfa_fcs_itnim_get_cos(&itnim->fcs_itnim);
1002
1003         itnim_data = fc_rport->dd_data;
1004         itnim_data->itnim = itnim;
1005
1006         rport_ids.roles |= FC_RPORT_ROLE_FCP_TARGET;
1007
1008         if (rport_ids.roles != FC_RPORT_ROLE_UNKNOWN)
1009                 fc_remote_port_rolechg(fc_rport, rport_ids.roles);
1010
1011         if ((fc_rport->scsi_target_id != -1)
1012             && (fc_rport->scsi_target_id < MAX_FCP_TARGET))
1013                 itnim->scsi_tgt_id = fc_rport->scsi_target_id;
1014
1015         return;
1016 }
1017
1018 /*
1019  * Work queue handler using FC transport service
1020 * Context: kernel
1021  */
1022 static void
1023 bfad_im_itnim_work_handler(struct work_struct *work)
1024 {
1025         struct bfad_itnim_s   *itnim = container_of(work, struct bfad_itnim_s,
1026                                                         itnim_work);
1027         struct bfad_im_s      *im = itnim->im;
1028         struct bfad_s         *bfad = im->bfad;
1029         struct bfad_im_port_s *im_port;
1030         unsigned long   flags;
1031         struct fc_rport *fc_rport;
1032         wwn_t wwpn;
1033         u32 fcid;
1034         char wwpn_str[32], fcid_str[16];
1035
1036         spin_lock_irqsave(&bfad->bfad_lock, flags);
1037         im_port = itnim->im_port;
1038         bfa_trc(bfad, itnim->state);
1039         switch (itnim->state) {
1040         case ITNIM_STATE_ONLINE:
1041                 if (!itnim->fc_rport) {
1042                         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
1043                         bfad_im_fc_rport_add(im_port, itnim);
1044                         spin_lock_irqsave(&bfad->bfad_lock, flags);
1045                         wwpn = bfa_fcs_itnim_get_pwwn(&itnim->fcs_itnim);
1046                         fcid = bfa_fcs_itnim_get_fcid(&itnim->fcs_itnim);
1047                         wwn2str(wwpn_str, wwpn);
1048                         fcid2str(fcid_str, fcid);
1049                         list_add_tail(&itnim->list_entry,
1050                                 &im_port->itnim_mapped_list);
1051                         BFA_LOG(KERN_INFO, bfad, log_level,
1052                                 "ITNIM ONLINE Target: %d:0:%d "
1053                                 "FCID: %s WWPN: %s\n",
1054                                 im_port->shost->host_no,
1055                                 itnim->scsi_tgt_id,
1056                                 fcid_str, wwpn_str);
1057                 } else {
1058                         printk(KERN_WARNING
1059                                 "%s: itnim %llx is already in online state\n",
1060                                 __func__,
1061                                 bfa_fcs_itnim_get_pwwn(&itnim->fcs_itnim));
1062                 }
1063
1064                 break;
1065         case ITNIM_STATE_OFFLINE_PENDING:
1066                 itnim->state = ITNIM_STATE_OFFLINE;
1067                 if (itnim->fc_rport) {
1068                         fc_rport = itnim->fc_rport;
1069                         ((struct bfad_itnim_data_s *)
1070                                 fc_rport->dd_data)->itnim = NULL;
1071                         itnim->fc_rport = NULL;
1072                         if (!(im_port->port->flags & BFAD_PORT_DELETE)) {
1073                                 spin_unlock_irqrestore(&bfad->bfad_lock, flags);
1074                                 fc_rport->dev_loss_tmo =
1075                                         bfa_fcpim_path_tov_get(&bfad->bfa) + 1;
1076                                 fc_remote_port_delete(fc_rport);
1077                                 spin_lock_irqsave(&bfad->bfad_lock, flags);
1078                         }
1079                         wwpn = bfa_fcs_itnim_get_pwwn(&itnim->fcs_itnim);
1080                         fcid = bfa_fcs_itnim_get_fcid(&itnim->fcs_itnim);
1081                         wwn2str(wwpn_str, wwpn);
1082                         fcid2str(fcid_str, fcid);
1083                         list_del(&itnim->list_entry);
1084                         BFA_LOG(KERN_INFO, bfad, log_level,
1085                                 "ITNIM OFFLINE Target: %d:0:%d "
1086                                 "FCID: %s WWPN: %s\n",
1087                                 im_port->shost->host_no,
1088                                 itnim->scsi_tgt_id,
1089                                 fcid_str, wwpn_str);
1090                 }
1091                 break;
1092         case ITNIM_STATE_FREE:
1093                 if (itnim->fc_rport) {
1094                         fc_rport = itnim->fc_rport;
1095                         ((struct bfad_itnim_data_s *)
1096                                 fc_rport->dd_data)->itnim = NULL;
1097                         itnim->fc_rport = NULL;
1098                         if (!(im_port->port->flags & BFAD_PORT_DELETE)) {
1099                                 spin_unlock_irqrestore(&bfad->bfad_lock, flags);
1100                                 fc_rport->dev_loss_tmo =
1101                                         bfa_fcpim_path_tov_get(&bfad->bfa) + 1;
1102                                 fc_remote_port_delete(fc_rport);
1103                                 spin_lock_irqsave(&bfad->bfad_lock, flags);
1104                         }
1105                         list_del(&itnim->list_entry);
1106                 }
1107
1108                 kfree(itnim);
1109                 break;
1110         default:
1111                 bfa_assert(0);
1112                 break;
1113         }
1114
1115         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
1116 }
1117
1118 /*
1119  * Scsi_Host template entry, queue a SCSI command to the BFAD.
1120  */
1121 static int
1122 bfad_im_queuecommand_lck(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *))
1123 {
1124         struct bfad_im_port_s *im_port =
1125                 (struct bfad_im_port_s *) cmnd->device->host->hostdata[0];
1126         struct bfad_s         *bfad = im_port->bfad;
1127         struct bfad_itnim_data_s *itnim_data = cmnd->device->hostdata;
1128         struct bfad_itnim_s   *itnim;
1129         struct bfa_ioim_s *hal_io;
1130         unsigned long   flags;
1131         int             rc;
1132         int       sg_cnt = 0;
1133         struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
1134
1135         rc = fc_remote_port_chkready(rport);
1136         if (rc) {
1137                 cmnd->result = rc;
1138                 done(cmnd);
1139                 return 0;
1140         }
1141
1142         sg_cnt = scsi_dma_map(cmnd);
1143         if (sg_cnt < 0)
1144                 return SCSI_MLQUEUE_HOST_BUSY;
1145
1146         cmnd->scsi_done = done;
1147
1148         spin_lock_irqsave(&bfad->bfad_lock, flags);
1149         if (!(bfad->bfad_flags & BFAD_HAL_START_DONE)) {
1150                 printk(KERN_WARNING
1151                         "bfad%d, queuecommand %p %x failed, BFA stopped\n",
1152                        bfad->inst_no, cmnd, cmnd->cmnd[0]);
1153                 cmnd->result = ScsiResult(DID_NO_CONNECT, 0);
1154                 goto out_fail_cmd;
1155         }
1156
1157
1158         itnim = itnim_data->itnim;
1159         if (!itnim) {
1160                 cmnd->result = ScsiResult(DID_IMM_RETRY, 0);
1161                 goto out_fail_cmd;
1162         }
1163
1164         hal_io = bfa_ioim_alloc(&bfad->bfa, (struct bfad_ioim_s *) cmnd,
1165                                     itnim->bfa_itnim, sg_cnt);
1166         if (!hal_io) {
1167                 printk(KERN_WARNING "hal_io failure\n");
1168                 spin_unlock_irqrestore(&bfad->bfad_lock, flags);
1169                 scsi_dma_unmap(cmnd);
1170                 return SCSI_MLQUEUE_HOST_BUSY;
1171         }
1172
1173         cmnd->host_scribble = (char *)hal_io;
1174         bfa_trc_fp(bfad, hal_io->iotag);
1175         bfa_ioim_start(hal_io);
1176         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
1177
1178         return 0;
1179
1180 out_fail_cmd:
1181         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
1182         scsi_dma_unmap(cmnd);
1183         if (done)
1184                 done(cmnd);
1185
1186         return 0;
1187 }
1188
1189 static DEF_SCSI_QCMD(bfad_im_queuecommand)
1190
1191 void
1192 bfad_os_rport_online_wait(struct bfad_s *bfad)
1193 {
1194         int i;
1195         int rport_delay = 10;
1196
1197         for (i = 0; !(bfad->bfad_flags & BFAD_PORT_ONLINE)
1198                 && i < bfa_linkup_delay; i++) {
1199                 set_current_state(TASK_UNINTERRUPTIBLE);
1200                 schedule_timeout(HZ);
1201         }
1202
1203         if (bfad->bfad_flags & BFAD_PORT_ONLINE) {
1204                 rport_delay = rport_delay < bfa_linkup_delay ?
1205                         rport_delay : bfa_linkup_delay;
1206                 for (i = 0; !(bfad->bfad_flags & BFAD_RPORT_ONLINE)
1207                         && i < rport_delay; i++) {
1208                         set_current_state(TASK_UNINTERRUPTIBLE);
1209                         schedule_timeout(HZ);
1210                 }
1211
1212                 if (rport_delay > 0 && (bfad->bfad_flags & BFAD_RPORT_ONLINE)) {
1213                         set_current_state(TASK_UNINTERRUPTIBLE);
1214                         schedule_timeout(rport_delay * HZ);
1215                 }
1216         }
1217 }
1218
1219 int
1220 bfad_os_get_linkup_delay(struct bfad_s *bfad)
1221 {
1222         u8              nwwns = 0;
1223         wwn_t           wwns[BFA_PREBOOT_BOOTLUN_MAX];
1224         int             linkup_delay;
1225
1226         /*
1227          * Querying for the boot target port wwns
1228          * -- read from boot information in flash.
1229          * If nwwns > 0 => boot over SAN and set linkup_delay = 30
1230          * else => local boot machine set linkup_delay = 0
1231          */
1232
1233         bfa_iocfc_get_bootwwns(&bfad->bfa, &nwwns, wwns);
1234
1235         if (nwwns > 0)
1236                 /* If Boot over SAN set linkup_delay = 30sec */
1237                 linkup_delay = 30;
1238         else
1239                 /* If local boot; no linkup_delay */
1240                 linkup_delay = 0;
1241
1242         return linkup_delay;
1243 }