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_fcs.h"
  25
  26 BFA_TRC_FILE(LDRV, IM);
  27
  28 DEFINE_IDR(bfad_im_port_index);
  29 struct scsi_transport_template *bfad_im_scsi_transport_template;
  30 struct scsi_transport_template *bfad_im_scsi_vport_transport_template;
  31 static void bfad_im_itnim_work_handler(struct work_struct *work);
  32 static int bfad_im_queuecommand(struct Scsi_Host *h, struct scsi_cmnd *cmnd);
  33 static int bfad_im_slave_alloc(struct scsi_device *sdev);
  34 static void bfad_im_fc_rport_add(struct bfad_im_port_s  *im_port,
  35                                 struct bfad_itnim_s *itnim);
  36
  37 void
  38 bfa_cb_ioim_done(void *drv, struct bfad_ioim_s *dio,
  39                         enum bfi_ioim_status io_status, u8 scsi_status,
  40                         int sns_len, u8 *sns_info, s32 residue)
  41 {
  42         struct scsi_cmnd *cmnd = (struct scsi_cmnd *)dio;
  43         struct bfad_s         *bfad = drv;
  44         struct bfad_itnim_data_s *itnim_data;
  45         struct bfad_itnim_s *itnim;
  46         u8         host_status = DID_OK;
  47
  48         switch (io_status) {
  49         case BFI_IOIM_STS_OK:
  50                 bfa_trc(bfad, scsi_status);
  51                 scsi_set_resid(cmnd, 0);
  52
  53                 if (sns_len > 0) {
  54                         bfa_trc(bfad, sns_len);
  55                         if (sns_len > SCSI_SENSE_BUFFERSIZE)
  56                                 sns_len = SCSI_SENSE_BUFFERSIZE;
  57                         memcpy(cmnd->sense_buffer, sns_info, sns_len);
  58                 }
  59
  60                 if (residue > 0) {
  61                         bfa_trc(bfad, residue);
  62                         scsi_set_resid(cmnd, residue);
  63                         if (!sns_len && (scsi_status == SAM_STAT_GOOD) &&
  64                                 (scsi_bufflen(cmnd) - residue) <
  65                                         cmnd->underflow) {
  66                                 bfa_trc(bfad, 0);
  67                                 host_status = DID_ERROR;
  68                         }
  69                 }
  70                 cmnd->result = ScsiResult(host_status, scsi_status);
  71
  72                 break;
  73
  74         case BFI_IOIM_STS_ABORTED:
  75         case BFI_IOIM_STS_TIMEDOUT:
  76         case BFI_IOIM_STS_PATHTOV:
  77         default:
  78                 host_status = DID_ERROR;
  79                 cmnd->result = ScsiResult(host_status, 0);
  80         }
  81
  82         /* Unmap DMA, if host is NULL, it means a scsi passthru cmd */
  83         if (cmnd->device->host != NULL)
  84                 scsi_dma_unmap(cmnd);
  85
  86         cmnd->host_scribble = NULL;
  87         bfa_trc(bfad, cmnd->result);
  88
  89         itnim_data = cmnd->device->hostdata;
  90         if (itnim_data) {
  91                 itnim = itnim_data->itnim;
  92                 if (!cmnd->result && itnim &&
  93                          (bfa_lun_queue_depth > cmnd->device->queue_depth)) {
  94                         /* Queue depth adjustment for good status completion */
  95                         bfad_ramp_up_qdepth(itnim, cmnd->device);
  96                 } else if (cmnd->result == SAM_STAT_TASK_SET_FULL && itnim) {
  97                         /* qfull handling */
  98                         bfad_handle_qfull(itnim, cmnd->device);
  99                 }
 100         }
 101
 102         cmnd->scsi_done(cmnd);
 103 }
 104
 105 void
 106 bfa_cb_ioim_good_comp(void *drv, struct bfad_ioim_s *dio)
 107 {
 108         struct scsi_cmnd *cmnd = (struct scsi_cmnd *)dio;
 109         struct bfad_itnim_data_s *itnim_data;
 110         struct bfad_itnim_s *itnim;
 111
 112         cmnd->result = ScsiResult(DID_OK, SCSI_STATUS_GOOD);
 113
 114         /* Unmap DMA, if host is NULL, it means a scsi passthru cmd */
 115         if (cmnd->device->host != NULL)
 116                 scsi_dma_unmap(cmnd);
 117
 118         cmnd->host_scribble = NULL;
 119
 120         /* Queue depth adjustment */
 121         if (bfa_lun_queue_depth > cmnd->device->queue_depth) {
 122                 itnim_data = cmnd->device->hostdata;
 123                 if (itnim_data) {
 124                         itnim = itnim_data->itnim;
 125                         if (itnim)
 126                                 bfad_ramp_up_qdepth(itnim, cmnd->device);
 127                 }
 128         }
 129
 130         cmnd->scsi_done(cmnd);
 131 }
 132
 133 void
 134 bfa_cb_ioim_abort(void *drv, struct bfad_ioim_s *dio)
 135 {
 136         struct scsi_cmnd *cmnd = (struct scsi_cmnd *)dio;
 137         struct bfad_s         *bfad = drv;
 138
 139         cmnd->result = ScsiResult(DID_ERROR, 0);
 140
 141         /* Unmap DMA, if host is NULL, it means a scsi passthru cmd */
 142         if (cmnd->device->host != NULL)
 143                 scsi_dma_unmap(cmnd);
 144
 145         bfa_trc(bfad, cmnd->result);
 146         cmnd->host_scribble = NULL;
 147 }
 148
 149 void
 150 bfa_cb_tskim_done(void *bfad, struct bfad_tskim_s *dtsk,
 151                    enum bfi_tskim_status tsk_status)
 152 {
 153         struct scsi_cmnd *cmnd = (struct scsi_cmnd *)dtsk;
 154         wait_queue_head_t *wq;
 155
 156         cmnd->SCp.Status |= tsk_status << 1;
 157         set_bit(IO_DONE_BIT, (unsigned long *)&cmnd->SCp.Status);
 158         wq = (wait_queue_head_t *) cmnd->SCp.ptr;
 159         cmnd->SCp.ptr = NULL;
 160
 161         if (wq)
 162                 wake_up(wq);
 163 }
 164
 165 /*
 166  *  Scsi_Host_template SCSI host template
 167  */
 168 /*
 169  * Scsi_Host template entry, returns BFAD PCI info.
 170  */
 171 static const char *
 172 bfad_im_info(struct Scsi_Host *shost)
 173 {
 174         static char     bfa_buf[256];
 175         struct bfad_im_port_s *im_port =
 176                         (struct bfad_im_port_s *) shost->hostdata[0];
 177         struct bfad_s *bfad = im_port->bfad;
 178         struct bfa_s *bfa = &bfad->bfa;
 179         struct bfa_ioc_s *ioc = &bfa->ioc;
 180         char model[BFA_ADAPTER_MODEL_NAME_LEN];
 181
 182         bfa_get_adapter_model(bfa, model);
 183
 184         memset(bfa_buf, 0, sizeof(bfa_buf));
 185         if (ioc->ctdev && !ioc->fcmode)
 186                 snprintf(bfa_buf, sizeof(bfa_buf),
 187                 "Brocade FCOE Adapter, " "model: %s hwpath: %s driver: %s",
 188                  model, bfad->pci_name, BFAD_DRIVER_VERSION);
 189         else
 190                 snprintf(bfa_buf, sizeof(bfa_buf),
 191                 "Brocade FC Adapter, " "model: %s hwpath: %s driver: %s",
 192                 model, bfad->pci_name, BFAD_DRIVER_VERSION);
 193
 194         return bfa_buf;
 195 }
 196
 197 /*
 198  * Scsi_Host template entry, aborts the specified SCSI command.
 199  *
 200  * Returns: SUCCESS or FAILED.
 201  */
 202 static int
 203 bfad_im_abort_handler(struct scsi_cmnd *cmnd)
 204 {
 205         struct Scsi_Host *shost = cmnd->device->host;
 206         struct bfad_im_port_s *im_port =
 207                         (struct bfad_im_port_s *) shost->hostdata[0];
 208         struct bfad_s         *bfad = im_port->bfad;
 209         struct bfa_ioim_s *hal_io;
 210         unsigned long   flags;
 211         u32        timeout;
 212         int             rc = FAILED;
 213
 214         spin_lock_irqsave(&bfad->bfad_lock, flags);
 215         hal_io = (struct bfa_ioim_s *) cmnd->host_scribble;
 216         if (!hal_io) {
 217                 /* IO has been completed, retrun success */
 218                 rc = SUCCESS;
 219                 goto out;
 220         }
 221         if (hal_io->dio != (struct bfad_ioim_s *) cmnd) {
 222                 rc = FAILED;
 223                 goto out;
 224         }
 225
 226         bfa_trc(bfad, hal_io->iotag);
 227         BFA_LOG(KERN_INFO, bfad, bfa_log_level,
 228                 "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, bfa_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         struct scsi_lun scsilun;
 261
 262         tskim = bfa_tskim_alloc(&bfad->bfa, (struct bfad_tskim_s *) cmnd);
 263         if (!tskim) {
 264                 BFA_LOG(KERN_ERR, bfad, bfa_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         memset(&scsilun, 0, sizeof(scsilun));
 278         bfa_tskim_start(tskim, bfa_itnim, scsilun,
 279                             FCP_TM_TARGET_RESET, BFAD_TARGET_RESET_TMO);
 280 out:
 281         return rc;
 282 }
 283
 284 /*
 285  * Scsi_Host template entry, resets a LUN and abort its all commands.
 286  *
 287  * Returns: SUCCESS or FAILED.
 288  *
 289  */
 290 static int
 291 bfad_im_reset_lun_handler(struct scsi_cmnd *cmnd)
 292 {
 293         struct Scsi_Host *shost = cmnd->device->host;
 294         struct bfad_im_port_s *im_port =
 295                         (struct bfad_im_port_s *) shost->hostdata[0];
 296         struct bfad_itnim_data_s *itnim_data = cmnd->device->hostdata;
 297         struct bfad_s         *bfad = im_port->bfad;
 298         struct bfa_tskim_s *tskim;
 299         struct bfad_itnim_s   *itnim;
 300         struct bfa_itnim_s *bfa_itnim;
 301         DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wq);
 302         int             rc = SUCCESS;
 303         unsigned long   flags;
 304         enum bfi_tskim_status task_status;
 305         struct scsi_lun scsilun;
 306
 307         spin_lock_irqsave(&bfad->bfad_lock, flags);
 308         itnim = itnim_data->itnim;
 309         if (!itnim) {
 310                 spin_unlock_irqrestore(&bfad->bfad_lock, flags);
 311                 rc = FAILED;
 312                 goto out;
 313         }
 314
 315         tskim = bfa_tskim_alloc(&bfad->bfa, (struct bfad_tskim_s *) cmnd);
 316         if (!tskim) {
 317                 BFA_LOG(KERN_ERR, bfad, bfa_log_level,
 318                                 "LUN reset, fail to allocate tskim");
 319                 spin_unlock_irqrestore(&bfad->bfad_lock, flags);
 320                 rc = FAILED;
 321                 goto out;
 322         }
 323
 324         /*
 325          * Set host_scribble to NULL to avoid aborting a task command
 326          * if happens.
 327          */
 328         cmnd->host_scribble = NULL;
 329         cmnd->SCp.ptr = (char *)&wq;
 330         cmnd->SCp.Status = 0;
 331         bfa_itnim = bfa_fcs_itnim_get_halitn(&itnim->fcs_itnim);
 332         int_to_scsilun(cmnd->device->lun, &scsilun);
 333         bfa_tskim_start(tskim, bfa_itnim, scsilun,
 334                             FCP_TM_LUN_RESET, BFAD_LUN_RESET_TMO);
 335         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
 336
 337         wait_event(wq, test_bit(IO_DONE_BIT,
 338                         (unsigned long *)&cmnd->SCp.Status));
 339
 340         task_status = cmnd->SCp.Status >> 1;
 341         if (task_status != BFI_TSKIM_STS_OK) {
 342                 BFA_LOG(KERN_ERR, bfad, bfa_log_level,
 343                         "LUN reset failure, status: %d\n", task_status);
 344                 rc = FAILED;
 345         }
 346
 347 out:
 348         return rc;
 349 }
 350
 351 /*
 352  * Scsi_Host template entry, resets the bus and abort all commands.
 353  */
 354 static int
 355 bfad_im_reset_bus_handler(struct scsi_cmnd *cmnd)
 356 {
 357         struct Scsi_Host *shost = cmnd->device->host;
 358         struct bfad_im_port_s *im_port =
 359                                 (struct bfad_im_port_s *) shost->hostdata[0];
 360         struct bfad_s         *bfad = im_port->bfad;
 361         struct bfad_itnim_s   *itnim;
 362         unsigned long   flags;
 363         u32        i, rc, err_cnt = 0;
 364         DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wq);
 365         enum bfi_tskim_status task_status;
 366
 367         spin_lock_irqsave(&bfad->bfad_lock, flags);
 368         for (i = 0; i < MAX_FCP_TARGET; i++) {
 369                 itnim = bfad_get_itnim(im_port, i);
 370                 if (itnim) {
 371                         cmnd->SCp.ptr = (char *)&wq;
 372                         rc = bfad_im_target_reset_send(bfad, cmnd, itnim);
 373                         if (rc != BFA_STATUS_OK) {
 374                                 err_cnt++;
 375                                 continue;
 376                         }
 377
 378                         /* wait target reset to complete */
 379                         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
 380                         wait_event(wq, test_bit(IO_DONE_BIT,
 381                                         (unsigned long *)&cmnd->SCp.Status));
 382                         spin_lock_irqsave(&bfad->bfad_lock, flags);
 383
 384                         task_status = cmnd->SCp.Status >> 1;
 385                         if (task_status != BFI_TSKIM_STS_OK) {
 386                                 BFA_LOG(KERN_ERR, bfad, bfa_log_level,
 387                                         "target reset failure,"
 388                                         " status: %d\n", task_status);
 389                                 err_cnt++;
 390                         }
 391                 }
 392         }
 393         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
 394
 395         if (err_cnt)
 396                 return FAILED;
 397
 398         return SUCCESS;
 399 }
 400
 401 /*
 402  * Scsi_Host template entry slave_destroy.
 403  */
 404 static void
 405 bfad_im_slave_destroy(struct scsi_device *sdev)
 406 {
 407         sdev->hostdata = NULL;
 408         return;
 409 }
 410
 411 /*
 412  *  BFA FCS itnim callbacks
 413  */
 414
 415 /*
 416  * BFA FCS itnim alloc callback, after successful PRLI
 417  * Context: Interrupt
 418  */
 419 void
 420 bfa_fcb_itnim_alloc(struct bfad_s *bfad, struct bfa_fcs_itnim_s **itnim,
 421                     struct bfad_itnim_s **itnim_drv)
 422 {
 423         *itnim_drv = kzalloc(sizeof(struct bfad_itnim_s), GFP_ATOMIC);
 424         if (*itnim_drv == NULL)
 425                 return;
 426
 427         (*itnim_drv)->im = bfad->im;
 428         *itnim = &(*itnim_drv)->fcs_itnim;
 429         (*itnim_drv)->state = ITNIM_STATE_NONE;
 430
 431         /*
 432          * Initiaze the itnim_work
 433          */
 434         INIT_WORK(&(*itnim_drv)->itnim_work, bfad_im_itnim_work_handler);
 435         bfad->bfad_flags |= BFAD_RPORT_ONLINE;
 436 }
 437
 438 /*
 439  * BFA FCS itnim free callback.
 440  * Context: Interrupt. bfad_lock is held
 441  */
 442 void
 443 bfa_fcb_itnim_free(struct bfad_s *bfad, struct bfad_itnim_s *itnim_drv)
 444 {
 445         struct bfad_port_s    *port;
 446         wwn_t wwpn;
 447         u32 fcid;
 448         char wwpn_str[32], fcid_str[16];
 449         struct bfad_im_s        *im = itnim_drv->im;
 450
 451         /* online to free state transtion should not happen */
 452         WARN_ON(itnim_drv->state == ITNIM_STATE_ONLINE);
 453
 454         itnim_drv->queue_work = 1;
 455         /* offline request is not yet done, use the same request to free */
 456         if (itnim_drv->state == ITNIM_STATE_OFFLINE_PENDING)
 457                 itnim_drv->queue_work = 0;
 458
 459         itnim_drv->state = ITNIM_STATE_FREE;
 460         port = bfa_fcs_itnim_get_drvport(&itnim_drv->fcs_itnim);
 461         itnim_drv->im_port = port->im_port;
 462         wwpn = bfa_fcs_itnim_get_pwwn(&itnim_drv->fcs_itnim);
 463         fcid = bfa_fcs_itnim_get_fcid(&itnim_drv->fcs_itnim);
 464         wwn2str(wwpn_str, wwpn);
 465         fcid2str(fcid_str, fcid);
 466         BFA_LOG(KERN_INFO, bfad, bfa_log_level,
 467                 "ITNIM FREE scsi%d: FCID: %s WWPN: %s\n",
 468                 port->im_port->shost->host_no,
 469                 fcid_str, wwpn_str);
 470
 471         /* ITNIM processing */
 472         if (itnim_drv->queue_work)
 473                 queue_work(im->drv_workq, &itnim_drv->itnim_work);
 474 }
 475
 476 /*
 477  * BFA FCS itnim online callback.
 478  * Context: Interrupt. bfad_lock is held
 479  */
 480 void
 481 bfa_fcb_itnim_online(struct bfad_itnim_s *itnim_drv)
 482 {
 483         struct bfad_port_s    *port;
 484         struct bfad_im_s        *im = itnim_drv->im;
 485
 486         itnim_drv->bfa_itnim = bfa_fcs_itnim_get_halitn(&itnim_drv->fcs_itnim);
 487         port = bfa_fcs_itnim_get_drvport(&itnim_drv->fcs_itnim);
 488         itnim_drv->state = ITNIM_STATE_ONLINE;
 489         itnim_drv->queue_work = 1;
 490         itnim_drv->im_port = port->im_port;
 491
 492         /* ITNIM processing */
 493         if (itnim_drv->queue_work)
 494                 queue_work(im->drv_workq, &itnim_drv->itnim_work);
 495 }
 496
 497 /*
 498  * BFA FCS itnim offline callback.
 499  * Context: Interrupt. bfad_lock is held
 500  */
 501 void
 502 bfa_fcb_itnim_offline(struct bfad_itnim_s *itnim_drv)
 503 {
 504         struct bfad_port_s    *port;
 505         struct bfad_s *bfad;
 506         struct bfad_im_s        *im = itnim_drv->im;
 507
 508         port = bfa_fcs_itnim_get_drvport(&itnim_drv->fcs_itnim);
 509         bfad = port->bfad;
 510         if ((bfad->pport.flags & BFAD_PORT_DELETE) ||
 511                  (port->flags & BFAD_PORT_DELETE)) {
 512                 itnim_drv->state = ITNIM_STATE_OFFLINE;
 513                 return;
 514         }
 515         itnim_drv->im_port = port->im_port;
 516         itnim_drv->state = ITNIM_STATE_OFFLINE_PENDING;
 517         itnim_drv->queue_work = 1;
 518
 519         /* ITNIM processing */
 520         if (itnim_drv->queue_work)
 521                 queue_work(im->drv_workq, &itnim_drv->itnim_work);
 522 }
 523
 524 /*
 525  * Allocate a Scsi_Host for a port.
 526  */
 527 int
 528 bfad_im_scsi_host_alloc(struct bfad_s *bfad, struct bfad_im_port_s *im_port,
 529                         struct device *dev)
 530 {
 531         int error = 1;
 532
 533         mutex_lock(&bfad_mutex);
 534         if (!idr_pre_get(&bfad_im_port_index, GFP_KERNEL)) {
 535                 mutex_unlock(&bfad_mutex);
 536                 printk(KERN_WARNING "idr_pre_get failure\n");
 537                 goto out;
 538         }
 539
 540         error = idr_get_new(&bfad_im_port_index, im_port,
 541                                          &im_port->idr_id);
 542         if (error) {
 543                 mutex_unlock(&bfad_mutex);
 544                 printk(KERN_WARNING "idr_get_new failure\n");
 545                 goto out;
 546         }
 547
 548         mutex_unlock(&bfad_mutex);
 549
 550         im_port->shost = bfad_scsi_host_alloc(im_port, bfad);
 551         if (!im_port->shost) {
 552                 error = 1;
 553                 goto out_free_idr;
 554         }
 555
 556         im_port->shost->hostdata[0] = (unsigned long)im_port;
 557         im_port->shost->unique_id = im_port->idr_id;
 558         im_port->shost->this_id = -1;
 559         im_port->shost->max_id = MAX_FCP_TARGET;
 560         im_port->shost->max_lun = MAX_FCP_LUN;
 561         im_port->shost->max_cmd_len = 16;
 562         im_port->shost->can_queue = bfad->cfg_data.ioc_queue_depth;
 563         if (im_port->port->pvb_type == BFAD_PORT_PHYS_BASE)
 564                 im_port->shost->transportt = bfad_im_scsi_transport_template;
 565         else
 566                 im_port->shost->transportt =
 567                                 bfad_im_scsi_vport_transport_template;
 568
 569         error = scsi_add_host_with_dma(im_port->shost, dev, &bfad->pcidev->dev);
 570         if (error) {
 571                 printk(KERN_WARNING "scsi_add_host failure %d\n", error);
 572                 goto out_fc_rel;
 573         }
 574
 575         /* setup host fixed attribute if the lk supports */
 576         bfad_fc_host_init(im_port);
 577
 578         return 0;
 579
 580 out_fc_rel:
 581         scsi_host_put(im_port->shost);
 582         im_port->shost = NULL;
 583 out_free_idr:
 584         mutex_lock(&bfad_mutex);
 585         idr_remove(&bfad_im_port_index, im_port->idr_id);
 586         mutex_unlock(&bfad_mutex);
 587 out:
 588         return error;
 589 }
 590
 591 void
 592 bfad_im_scsi_host_free(struct bfad_s *bfad, struct bfad_im_port_s *im_port)
 593 {
 594         bfa_trc(bfad, bfad->inst_no);
 595         BFA_LOG(KERN_INFO, bfad, bfa_log_level, "Free scsi%d\n",
 596                         im_port->shost->host_no);
 597
 598         fc_remove_host(im_port->shost);
 599
 600         scsi_remove_host(im_port->shost);
 601         scsi_host_put(im_port->shost);
 602
 603         mutex_lock(&bfad_mutex);
 604         idr_remove(&bfad_im_port_index, im_port->idr_id);
 605         mutex_unlock(&bfad_mutex);
 606 }
 607
 608 static void
 609 bfad_im_port_delete_handler(struct work_struct *work)
 610 {
 611         struct bfad_im_port_s *im_port =
 612                 container_of(work, struct bfad_im_port_s, port_delete_work);
 613
 614         if (im_port->port->pvb_type != BFAD_PORT_PHYS_BASE) {
 615                 im_port->flags |= BFAD_PORT_DELETE;
 616                 fc_vport_terminate(im_port->fc_vport);
 617         }
 618 }
 619
 620 bfa_status_t
 621 bfad_im_port_new(struct bfad_s *bfad, struct bfad_port_s *port)
 622 {
 623         int             rc = BFA_STATUS_OK;
 624         struct bfad_im_port_s *im_port;
 625
 626         im_port = kzalloc(sizeof(struct bfad_im_port_s), GFP_ATOMIC);
 627         if (im_port == NULL) {
 628                 rc = BFA_STATUS_ENOMEM;
 629                 goto ext;
 630         }
 631         port->im_port = im_port;
 632         im_port->port = port;
 633         im_port->bfad = bfad;
 634
 635         INIT_WORK(&im_port->port_delete_work, bfad_im_port_delete_handler);
 636         INIT_LIST_HEAD(&im_port->itnim_mapped_list);
 637         INIT_LIST_HEAD(&im_port->binding_list);
 638
 639 ext:
 640         return rc;
 641 }
 642
 643 void
 644 bfad_im_port_delete(struct bfad_s *bfad, struct bfad_port_s *port)
 645 {
 646         struct bfad_im_port_s *im_port = port->im_port;
 647
 648         queue_work(bfad->im->drv_workq,
 649                                 &im_port->port_delete_work);
 650 }
 651
 652 void
 653 bfad_im_port_clean(struct bfad_im_port_s *im_port)
 654 {
 655         struct bfad_fcp_binding *bp, *bp_new;
 656         unsigned long flags;
 657         struct bfad_s *bfad =  im_port->bfad;
 658
 659         spin_lock_irqsave(&bfad->bfad_lock, flags);
 660         list_for_each_entry_safe(bp, bp_new, &im_port->binding_list,
 661                                         list_entry) {
 662                 list_del(&bp->list_entry);
 663                 kfree(bp);
 664         }
 665
 666         /* the itnim_mapped_list must be empty at this time */
 667         WARN_ON(!list_empty(&im_port->itnim_mapped_list));
 668
 669         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
 670 }
 671
 672 bfa_status_t
 673 bfad_im_probe(struct bfad_s *bfad)
 674 {
 675         struct bfad_im_s      *im;
 676         bfa_status_t    rc = BFA_STATUS_OK;
 677
 678         im = kzalloc(sizeof(struct bfad_im_s), GFP_KERNEL);
 679         if (im == NULL) {
 680                 rc = BFA_STATUS_ENOMEM;
 681                 goto ext;
 682         }
 683
 684         bfad->im = im;
 685         im->bfad = bfad;
 686
 687         if (bfad_thread_workq(bfad) != BFA_STATUS_OK) {
 688                 kfree(im);
 689                 rc = BFA_STATUS_FAILED;
 690         }
 691
 692 ext:
 693         return rc;
 694 }
 695
 696 void
 697 bfad_im_probe_undo(struct bfad_s *bfad)
 698 {
 699         if (bfad->im) {
 700                 bfad_destroy_workq(bfad->im);
 701                 kfree(bfad->im);
 702                 bfad->im = NULL;
 703         }
 704 }
 705
 706 struct Scsi_Host *
 707 bfad_scsi_host_alloc(struct bfad_im_port_s *im_port, struct bfad_s *bfad)
 708 {
 709         struct scsi_host_template *sht;
 710
 711         if (im_port->port->pvb_type == BFAD_PORT_PHYS_BASE)
 712                 sht = &bfad_im_scsi_host_template;
 713         else
 714                 sht = &bfad_im_vport_template;
 715
 716         sht->sg_tablesize = bfad->cfg_data.io_max_sge;
 717
 718         return scsi_host_alloc(sht, sizeof(unsigned long));
 719 }
 720
 721 void
 722 bfad_scsi_host_free(struct bfad_s *bfad, struct bfad_im_port_s *im_port)
 723 {
 724         if (!(im_port->flags & BFAD_PORT_DELETE))
 725                 flush_workqueue(bfad->im->drv_workq);
 726         bfad_im_scsi_host_free(im_port->bfad, im_port);
 727         bfad_im_port_clean(im_port);
 728         kfree(im_port);
 729 }
 730
 731 void
 732 bfad_destroy_workq(struct bfad_im_s *im)
 733 {
 734         if (im && im->drv_workq) {
 735                 flush_workqueue(im->drv_workq);
 736                 destroy_workqueue(im->drv_workq);
 737                 im->drv_workq = NULL;
 738         }
 739 }
 740
 741 bfa_status_t
 742 bfad_thread_workq(struct bfad_s *bfad)
 743 {
 744         struct bfad_im_s      *im = bfad->im;
 745
 746         bfa_trc(bfad, 0);
 747         snprintf(im->drv_workq_name, KOBJ_NAME_LEN, "bfad_wq_%d",
 748                  bfad->inst_no);
 749         im->drv_workq = create_singlethread_workqueue(im->drv_workq_name);
 750         if (!im->drv_workq)
 751                 return BFA_STATUS_FAILED;
 752
 753         return BFA_STATUS_OK;
 754 }
 755
 756 /*
 757  * Scsi_Host template entry.
 758  *
 759  * Description:
 760  * OS entry point to adjust the queue_depths on a per-device basis.
 761  * Called once per device during the bus scan.
 762  * Return non-zero if fails.
 763  */
 764 static int
 765 bfad_im_slave_configure(struct scsi_device *sdev)
 766 {
 767         if (sdev->tagged_supported)
 768                 scsi_activate_tcq(sdev, bfa_lun_queue_depth);
 769         else
 770                 scsi_deactivate_tcq(sdev, bfa_lun_queue_depth);
 771
 772         return 0;
 773 }
 774
 775 struct scsi_host_template bfad_im_scsi_host_template = {
 776         .module = THIS_MODULE,
 777         .name = BFAD_DRIVER_NAME,
 778         .info = bfad_im_info,
 779         .queuecommand = bfad_im_queuecommand,
 780         .eh_abort_handler = bfad_im_abort_handler,
 781         .eh_device_reset_handler = bfad_im_reset_lun_handler,
 782         .eh_bus_reset_handler = bfad_im_reset_bus_handler,
 783
 784         .slave_alloc = bfad_im_slave_alloc,
 785         .slave_configure = bfad_im_slave_configure,
 786         .slave_destroy = bfad_im_slave_destroy,
 787
 788         .this_id = -1,
 789         .sg_tablesize = BFAD_IO_MAX_SGE,
 790         .cmd_per_lun = 3,
 791         .use_clustering = ENABLE_CLUSTERING,
 792         .shost_attrs = bfad_im_host_attrs,
 793         .max_sectors = 0xFFFF,
 794 };
 795
 796 struct scsi_host_template bfad_im_vport_template = {
 797         .module = THIS_MODULE,
 798         .name = BFAD_DRIVER_NAME,
 799         .info = bfad_im_info,
 800         .queuecommand = bfad_im_queuecommand,
 801         .eh_abort_handler = bfad_im_abort_handler,
 802         .eh_device_reset_handler = bfad_im_reset_lun_handler,
 803         .eh_bus_reset_handler = bfad_im_reset_bus_handler,
 804
 805         .slave_alloc = bfad_im_slave_alloc,
 806         .slave_configure = bfad_im_slave_configure,
 807         .slave_destroy = bfad_im_slave_destroy,
 808
 809         .this_id = -1,
 810         .sg_tablesize = BFAD_IO_MAX_SGE,
 811         .cmd_per_lun = 3,
 812         .use_clustering = ENABLE_CLUSTERING,
 813         .shost_attrs = bfad_im_vport_attrs,
 814         .max_sectors = 0xFFFF,
 815 };
 816
 817 bfa_status_t
 818 bfad_im_module_init(void)
 819 {
 820         bfad_im_scsi_transport_template =
 821                 fc_attach_transport(&bfad_im_fc_function_template);
 822         if (!bfad_im_scsi_transport_template)
 823                 return BFA_STATUS_ENOMEM;
 824
 825         bfad_im_scsi_vport_transport_template =
 826                 fc_attach_transport(&bfad_im_vport_fc_function_template);
 827         if (!bfad_im_scsi_vport_transport_template) {
 828                 fc_release_transport(bfad_im_scsi_transport_template);
 829                 return BFA_STATUS_ENOMEM;
 830         }
 831
 832         return BFA_STATUS_OK;
 833 }
 834
 835 void
 836 bfad_im_module_exit(void)
 837 {
 838         if (bfad_im_scsi_transport_template)
 839                 fc_release_transport(bfad_im_scsi_transport_template);
 840
 841         if (bfad_im_scsi_vport_transport_template)
 842                 fc_release_transport(bfad_im_scsi_vport_transport_template);
 843 }
 844
 845 void
 846 bfad_ramp_up_qdepth(struct bfad_itnim_s *itnim, struct scsi_device *sdev)
 847 {
 848         struct scsi_device *tmp_sdev;
 849
 850         if (((jiffies - itnim->last_ramp_up_time) >
 851                 BFA_QUEUE_FULL_RAMP_UP_TIME * HZ) &&
 852                 ((jiffies - itnim->last_queue_full_time) >
 853                 BFA_QUEUE_FULL_RAMP_UP_TIME * HZ)) {
 854                 shost_for_each_device(tmp_sdev, sdev->host) {
 855                         if (bfa_lun_queue_depth > tmp_sdev->queue_depth) {
 856                                 if (tmp_sdev->id != sdev->id)
 857                                         continue;
 858                                 if (tmp_sdev->ordered_tags)
 859                                         scsi_adjust_queue_depth(tmp_sdev,
 860                                                 MSG_ORDERED_TAG,
 861                                                 tmp_sdev->queue_depth + 1);
 862                                 else
 863                                         scsi_adjust_queue_depth(tmp_sdev,
 864                                                 MSG_SIMPLE_TAG,
 865                                                 tmp_sdev->queue_depth + 1);
 866
 867                                 itnim->last_ramp_up_time = jiffies;
 868                         }
 869                 }
 870         }
 871 }
 872
 873 void
 874 bfad_handle_qfull(struct bfad_itnim_s *itnim, struct scsi_device *sdev)
 875 {
 876         struct scsi_device *tmp_sdev;
 877
 878         itnim->last_queue_full_time = jiffies;
 879
 880         shost_for_each_device(tmp_sdev, sdev->host) {
 881                 if (tmp_sdev->id != sdev->id)
 882                         continue;
 883                 scsi_track_queue_full(tmp_sdev, tmp_sdev->queue_depth - 1);
 884         }
 885 }
 886
 887 struct bfad_itnim_s *
 888 bfad_get_itnim(struct bfad_im_port_s *im_port, int id)
 889 {
 890         struct bfad_itnim_s   *itnim = NULL;
 891
 892         /* Search the mapped list for this target ID */
 893         list_for_each_entry(itnim, &im_port->itnim_mapped_list, list_entry) {
 894                 if (id == itnim->scsi_tgt_id)
 895                         return itnim;
 896         }
 897
 898         return NULL;
 899 }
 900
 901 /*
 902  * Scsi_Host template entry slave_alloc
 903  */
 904 static int
 905 bfad_im_slave_alloc(struct scsi_device *sdev)
 906 {
 907         struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
 908
 909         if (!rport || fc_remote_port_chkready(rport))
 910                 return -ENXIO;
 911
 912         sdev->hostdata = rport->dd_data;
 913
 914         return 0;
 915 }
 916
 917 static u32
 918 bfad_im_supported_speeds(struct bfa_s *bfa)
 919 {
 920         struct bfa_ioc_attr_s *ioc_attr;
 921         u32 supported_speed = 0;
 922
 923         ioc_attr = kzalloc(sizeof(struct bfa_ioc_attr_s), GFP_KERNEL);
 924         if (!ioc_attr)
 925                 return 0;
 926
 927         bfa_ioc_get_attr(&bfa->ioc, ioc_attr);
 928         if (ioc_attr->adapter_attr.max_speed == BFA_PORT_SPEED_8GBPS) {
 929                 if (ioc_attr->adapter_attr.is_mezz) {
 930                         supported_speed |= FC_PORTSPEED_8GBIT |
 931                                 FC_PORTSPEED_4GBIT |
 932                                 FC_PORTSPEED_2GBIT | FC_PORTSPEED_1GBIT;
 933                 } else {
 934                         supported_speed |= FC_PORTSPEED_8GBIT |
 935                                 FC_PORTSPEED_4GBIT |
 936                                 FC_PORTSPEED_2GBIT;
 937                 }
 938         } else if (ioc_attr->adapter_attr.max_speed == BFA_PORT_SPEED_4GBPS) {
 939                 supported_speed |=  FC_PORTSPEED_4GBIT | FC_PORTSPEED_2GBIT |
 940                                 FC_PORTSPEED_1GBIT;
 941         } else if (ioc_attr->adapter_attr.max_speed == BFA_PORT_SPEED_10GBPS) {
 942                 supported_speed |= FC_PORTSPEED_10GBIT;
 943         }
 944         kfree(ioc_attr);
 945         return supported_speed;
 946 }
 947
 948 void
 949 bfad_fc_host_init(struct bfad_im_port_s *im_port)
 950 {
 951         struct Scsi_Host *host = im_port->shost;
 952         struct bfad_s         *bfad = im_port->bfad;
 953         struct bfad_port_s    *port = im_port->port;
 954         char symname[BFA_SYMNAME_MAXLEN];
 955         struct bfa_fcport_s *fcport = BFA_FCPORT_MOD(&bfad->bfa);
 956
 957         fc_host_node_name(host) =
 958                 cpu_to_be64((bfa_fcs_lport_get_nwwn(port->fcs_port)));
 959         fc_host_port_name(host) =
 960                 cpu_to_be64((bfa_fcs_lport_get_pwwn(port->fcs_port)));
 961         fc_host_max_npiv_vports(host) = bfa_lps_get_max_vport(&bfad->bfa);
 962
 963         fc_host_supported_classes(host) = FC_COS_CLASS3;
 964
 965         memset(fc_host_supported_fc4s(host), 0,
 966                sizeof(fc_host_supported_fc4s(host)));
 967         if (supported_fc4s & BFA_LPORT_ROLE_FCP_IM)
 968                 /* For FCP type 0x08 */
 969                 fc_host_supported_fc4s(host)[2] = 1;
 970         /* For fibre channel services type 0x20 */
 971         fc_host_supported_fc4s(host)[7] = 1;
 972
 973         strncpy(symname, bfad->bfa_fcs.fabric.bport.port_cfg.sym_name.symname,
 974                 BFA_SYMNAME_MAXLEN);
 975         sprintf(fc_host_symbolic_name(host), "%s", symname);
 976
 977         fc_host_supported_speeds(host) = bfad_im_supported_speeds(&bfad->bfa);
 978         fc_host_maxframe_size(host) = fcport->cfg.maxfrsize;
 979 }
 980
 981 static void
 982 bfad_im_fc_rport_add(struct bfad_im_port_s *im_port, struct bfad_itnim_s *itnim)
 983 {
 984         struct fc_rport_identifiers rport_ids;
 985         struct fc_rport *fc_rport;
 986         struct bfad_itnim_data_s *itnim_data;
 987
 988         rport_ids.node_name =
 989                 cpu_to_be64(bfa_fcs_itnim_get_nwwn(&itnim->fcs_itnim));
 990         rport_ids.port_name =
 991                 cpu_to_be64(bfa_fcs_itnim_get_pwwn(&itnim->fcs_itnim));
 992         rport_ids.port_id =
 993                 bfa_hton3b(bfa_fcs_itnim_get_fcid(&itnim->fcs_itnim));
 994         rport_ids.roles = FC_RPORT_ROLE_UNKNOWN;
 995
 996         itnim->fc_rport = fc_rport =
 997                 fc_remote_port_add(im_port->shost, 0, &rport_ids);
 998
 999         if (!fc_rport)
1000                 return;
1001
1002         fc_rport->maxframe_size =
1003                 bfa_fcs_itnim_get_maxfrsize(&itnim->fcs_itnim);
1004         fc_rport->supported_classes = bfa_fcs_itnim_get_cos(&itnim->fcs_itnim);
1005
1006         itnim_data = fc_rport->dd_data;
1007         itnim_data->itnim = itnim;
1008
1009         rport_ids.roles |= FC_RPORT_ROLE_FCP_TARGET;
1010
1011         if (rport_ids.roles != FC_RPORT_ROLE_UNKNOWN)
1012                 fc_remote_port_rolechg(fc_rport, rport_ids.roles);
1013
1014         if ((fc_rport->scsi_target_id != -1)
1015             && (fc_rport->scsi_target_id < MAX_FCP_TARGET))
1016                 itnim->scsi_tgt_id = fc_rport->scsi_target_id;
1017
1018         return;
1019 }
1020
1021 /*
1022  * Work queue handler using FC transport service
1023 * Context: kernel
1024  */
1025 static void
1026 bfad_im_itnim_work_handler(struct work_struct *work)
1027 {
1028         struct bfad_itnim_s   *itnim = container_of(work, struct bfad_itnim_s,
1029                                                         itnim_work);
1030         struct bfad_im_s      *im = itnim->im;
1031         struct bfad_s         *bfad = im->bfad;
1032         struct bfad_im_port_s *im_port;
1033         unsigned long   flags;
1034         struct fc_rport *fc_rport;
1035         wwn_t wwpn;
1036         u32 fcid;
1037         char wwpn_str[32], fcid_str[16];
1038
1039         spin_lock_irqsave(&bfad->bfad_lock, flags);
1040         im_port = itnim->im_port;
1041         bfa_trc(bfad, itnim->state);
1042         switch (itnim->state) {
1043         case ITNIM_STATE_ONLINE:
1044                 if (!itnim->fc_rport) {
1045                         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
1046                         bfad_im_fc_rport_add(im_port, itnim);
1047                         spin_lock_irqsave(&bfad->bfad_lock, flags);
1048                         wwpn = bfa_fcs_itnim_get_pwwn(&itnim->fcs_itnim);
1049                         fcid = bfa_fcs_itnim_get_fcid(&itnim->fcs_itnim);
1050                         wwn2str(wwpn_str, wwpn);
1051                         fcid2str(fcid_str, fcid);
1052                         list_add_tail(&itnim->list_entry,
1053                                 &im_port->itnim_mapped_list);
1054                         BFA_LOG(KERN_INFO, bfad, bfa_log_level,
1055                                 "ITNIM ONLINE Target: %d:0:%d "
1056                                 "FCID: %s WWPN: %s\n",
1057                                 im_port->shost->host_no,
1058                                 itnim->scsi_tgt_id,
1059                                 fcid_str, wwpn_str);
1060                 } else {
1061                         printk(KERN_WARNING
1062                                 "%s: itnim %llx is already in online state\n",
1063                                 __func__,
1064                                 bfa_fcs_itnim_get_pwwn(&itnim->fcs_itnim));
1065                 }
1066
1067                 break;
1068         case ITNIM_STATE_OFFLINE_PENDING:
1069                 itnim->state = ITNIM_STATE_OFFLINE;
1070                 if (itnim->fc_rport) {
1071                         fc_rport = itnim->fc_rport;
1072                         ((struct bfad_itnim_data_s *)
1073                                 fc_rport->dd_data)->itnim = NULL;
1074                         itnim->fc_rport = NULL;
1075                         if (!(im_port->port->flags & BFAD_PORT_DELETE)) {
1076                                 spin_unlock_irqrestore(&bfad->bfad_lock, flags);
1077                                 fc_rport->dev_loss_tmo =
1078                                         bfa_fcpim_path_tov_get(&bfad->bfa) + 1;
1079                                 fc_remote_port_delete(fc_rport);
1080                                 spin_lock_irqsave(&bfad->bfad_lock, flags);
1081                         }
1082                         wwpn = bfa_fcs_itnim_get_pwwn(&itnim->fcs_itnim);
1083                         fcid = bfa_fcs_itnim_get_fcid(&itnim->fcs_itnim);
1084                         wwn2str(wwpn_str, wwpn);
1085                         fcid2str(fcid_str, fcid);
1086                         list_del(&itnim->list_entry);
1087                         BFA_LOG(KERN_INFO, bfad, bfa_log_level,
1088                                 "ITNIM OFFLINE Target: %d:0:%d "
1089                                 "FCID: %s WWPN: %s\n",
1090                                 im_port->shost->host_no,
1091                                 itnim->scsi_tgt_id,
1092                                 fcid_str, wwpn_str);
1093                 }
1094                 break;
1095         case ITNIM_STATE_FREE:
1096                 if (itnim->fc_rport) {
1097                         fc_rport = itnim->fc_rport;
1098                         ((struct bfad_itnim_data_s *)
1099                                 fc_rport->dd_data)->itnim = NULL;
1100                         itnim->fc_rport = NULL;
1101                         if (!(im_port->port->flags & BFAD_PORT_DELETE)) {
1102                                 spin_unlock_irqrestore(&bfad->bfad_lock, flags);
1103                                 fc_rport->dev_loss_tmo =
1104                                         bfa_fcpim_path_tov_get(&bfad->bfa) + 1;
1105                                 fc_remote_port_delete(fc_rport);
1106                                 spin_lock_irqsave(&bfad->bfad_lock, flags);
1107                         }
1108                         list_del(&itnim->list_entry);
1109                 }
1110
1111                 kfree(itnim);
1112                 break;
1113         default:
1114                 WARN_ON(1);
1115                 break;
1116         }
1117
1118         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
1119 }
1120
1121 /*
1122  * Scsi_Host template entry, queue a SCSI command to the BFAD.
1123  */
1124 static int
1125 bfad_im_queuecommand_lck(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *))
1126 {
1127         struct bfad_im_port_s *im_port =
1128                 (struct bfad_im_port_s *) cmnd->device->host->hostdata[0];
1129         struct bfad_s         *bfad = im_port->bfad;
1130         struct bfad_itnim_data_s *itnim_data = cmnd->device->hostdata;
1131         struct bfad_itnim_s   *itnim;
1132         struct bfa_ioim_s *hal_io;
1133         unsigned long   flags;
1134         int             rc;
1135         int       sg_cnt = 0;
1136         struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
1137
1138         rc = fc_remote_port_chkready(rport);
1139         if (rc) {
1140                 cmnd->result = rc;
1141                 done(cmnd);
1142                 return 0;
1143         }
1144
1145         sg_cnt = scsi_dma_map(cmnd);
1146         if (sg_cnt < 0)
1147                 return SCSI_MLQUEUE_HOST_BUSY;
1148
1149         cmnd->scsi_done = done;
1150
1151         spin_lock_irqsave(&bfad->bfad_lock, flags);
1152         if (!(bfad->bfad_flags & BFAD_HAL_START_DONE)) {
1153                 printk(KERN_WARNING
1154                         "bfad%d, queuecommand %p %x failed, BFA stopped\n",
1155                        bfad->inst_no, cmnd, cmnd->cmnd[0]);
1156                 cmnd->result = ScsiResult(DID_NO_CONNECT, 0);
1157                 goto out_fail_cmd;
1158         }
1159
1160
1161         itnim = itnim_data->itnim;
1162         if (!itnim) {
1163                 cmnd->result = ScsiResult(DID_IMM_RETRY, 0);
1164                 goto out_fail_cmd;
1165         }
1166
1167         hal_io = bfa_ioim_alloc(&bfad->bfa, (struct bfad_ioim_s *) cmnd,
1168                                     itnim->bfa_itnim, sg_cnt);
1169         if (!hal_io) {
1170                 printk(KERN_WARNING "hal_io failure\n");
1171                 spin_unlock_irqrestore(&bfad->bfad_lock, flags);
1172                 scsi_dma_unmap(cmnd);
1173                 return SCSI_MLQUEUE_HOST_BUSY;
1174         }
1175
1176         cmnd->host_scribble = (char *)hal_io;
1177         bfa_ioim_start(hal_io);
1178         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
1179
1180         return 0;
1181
1182 out_fail_cmd:
1183         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
1184         scsi_dma_unmap(cmnd);
1185         if (done)
1186                 done(cmnd);
1187
1188         return 0;
1189 }
1190
1191 static DEF_SCSI_QCMD(bfad_im_queuecommand)
1192
1193 void
1194 bfad_rport_online_wait(struct bfad_s *bfad)
1195 {
1196         int i;
1197         int rport_delay = 10;
1198
1199         for (i = 0; !(bfad->bfad_flags & BFAD_PORT_ONLINE)
1200                 && i < bfa_linkup_delay; i++) {
1201                 set_current_state(TASK_UNINTERRUPTIBLE);
1202                 schedule_timeout(HZ);
1203         }
1204
1205         if (bfad->bfad_flags & BFAD_PORT_ONLINE) {
1206                 rport_delay = rport_delay < bfa_linkup_delay ?
1207                         rport_delay : bfa_linkup_delay;
1208                 for (i = 0; !(bfad->bfad_flags & BFAD_RPORT_ONLINE)
1209                         && i < rport_delay; i++) {
1210                         set_current_state(TASK_UNINTERRUPTIBLE);
1211                         schedule_timeout(HZ);
1212                 }
1213
1214                 if (rport_delay > 0 && (bfad->bfad_flags & BFAD_RPORT_ONLINE)) {
1215                         set_current_state(TASK_UNINTERRUPTIBLE);
1216                         schedule_timeout(rport_delay * HZ);
1217                 }
1218         }
1219 }
1220
1221 int
1222 bfad_get_linkup_delay(struct bfad_s *bfad)
1223 {
1224         u8              nwwns = 0;
1225         wwn_t           wwns[BFA_PREBOOT_BOOTLUN_MAX];
1226         int             linkup_delay;
1227
1228         /*
1229          * Querying for the boot target port wwns
1230          * -- read from boot information in flash.
1231          * If nwwns > 0 => boot over SAN and set linkup_delay = 30
1232          * else => local boot machine set linkup_delay = 0
1233          */
1234
1235         bfa_iocfc_get_bootwwns(&bfad->bfa, &nwwns, wwns);
1236
1237         if (nwwns > 0)
1238                 /* If Boot over SAN set linkup_delay = 30sec */
1239                 linkup_delay = 30;
1240         else
1241                 /* If local boot; no linkup_delay */
1242                 linkup_delay = 0;
1243
1244         return linkup_delay;
1245 }