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