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
 179         memset(bfa_buf, 0, sizeof(bfa_buf));
 180         snprintf(bfa_buf, sizeof(bfa_buf),
 181                 "Brocade FC/FCOE Adapter, " "hwpath: %s driver: %s",
 182                 bfad->pci_name, BFAD_DRIVER_VERSION);
 183
 184         return bfa_buf;
 185 }
 186
 187 /*
 188  * Scsi_Host template entry, aborts the specified SCSI command.
 189  *
 190  * Returns: SUCCESS or FAILED.
 191  */
 192 static int
 193 bfad_im_abort_handler(struct scsi_cmnd *cmnd)
 194 {
 195         struct Scsi_Host *shost = cmnd->device->host;
 196         struct bfad_im_port_s *im_port =
 197                         (struct bfad_im_port_s *) shost->hostdata[0];
 198         struct bfad_s         *bfad = im_port->bfad;
 199         struct bfa_ioim_s *hal_io;
 200         unsigned long   flags;
 201         u32        timeout;
 202         int             rc = FAILED;
 203
 204         spin_lock_irqsave(&bfad->bfad_lock, flags);
 205         hal_io = (struct bfa_ioim_s *) cmnd->host_scribble;
 206         if (!hal_io) {
 207                 /* IO has been completed, retrun success */
 208                 rc = SUCCESS;
 209                 goto out;
 210         }
 211         if (hal_io->dio != (struct bfad_ioim_s *) cmnd) {
 212                 rc = FAILED;
 213                 goto out;
 214         }
 215
 216         bfa_trc(bfad, hal_io->iotag);
 217         BFA_LOG(KERN_INFO, bfad, bfa_log_level,
 218                 "scsi%d: abort cmnd %p iotag %x\n",
 219                 im_port->shost->host_no, cmnd, hal_io->iotag);
 220         (void) bfa_ioim_abort(hal_io);
 221         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
 222
 223         /* Need to wait until the command get aborted */
 224         timeout = 10;
 225         while ((struct bfa_ioim_s *) cmnd->host_scribble == hal_io) {
 226                 set_current_state(TASK_UNINTERRUPTIBLE);
 227                 schedule_timeout(timeout);
 228                 if (timeout < 4 * HZ)
 229                         timeout *= 2;
 230         }
 231
 232         cmnd->scsi_done(cmnd);
 233         bfa_trc(bfad, hal_io->iotag);
 234         BFA_LOG(KERN_INFO, bfad, bfa_log_level,
 235                 "scsi%d: complete abort 0x%p iotag 0x%x\n",
 236                 im_port->shost->host_no, cmnd, hal_io->iotag);
 237         return SUCCESS;
 238 out:
 239         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
 240         return rc;
 241 }
 242
 243 static bfa_status_t
 244 bfad_im_target_reset_send(struct bfad_s *bfad, struct scsi_cmnd *cmnd,
 245                      struct bfad_itnim_s *itnim)
 246 {
 247         struct bfa_tskim_s *tskim;
 248         struct bfa_itnim_s *bfa_itnim;
 249         bfa_status_t    rc = BFA_STATUS_OK;
 250         struct scsi_lun scsilun;
 251
 252         tskim = bfa_tskim_alloc(&bfad->bfa, (struct bfad_tskim_s *) cmnd);
 253         if (!tskim) {
 254                 BFA_LOG(KERN_ERR, bfad, bfa_log_level,
 255                         "target reset, fail to allocate tskim\n");
 256                 rc = BFA_STATUS_FAILED;
 257                 goto out;
 258         }
 259
 260         /*
 261          * Set host_scribble to NULL to avoid aborting a task command if
 262          * happens.
 263          */
 264         cmnd->host_scribble = NULL;
 265         cmnd->SCp.Status = 0;
 266         bfa_itnim = bfa_fcs_itnim_get_halitn(&itnim->fcs_itnim);
 267         memset(&scsilun, 0, sizeof(scsilun));
 268         bfa_tskim_start(tskim, bfa_itnim, scsilun,
 269                             FCP_TM_TARGET_RESET, BFAD_TARGET_RESET_TMO);
 270 out:
 271         return rc;
 272 }
 273
 274 /*
 275  * Scsi_Host template entry, resets a LUN and abort its all commands.
 276  *
 277  * Returns: SUCCESS or FAILED.
 278  *
 279  */
 280 static int
 281 bfad_im_reset_lun_handler(struct scsi_cmnd *cmnd)
 282 {
 283         struct Scsi_Host *shost = cmnd->device->host;
 284         struct bfad_im_port_s *im_port =
 285                         (struct bfad_im_port_s *) shost->hostdata[0];
 286         struct bfad_itnim_data_s *itnim_data = cmnd->device->hostdata;
 287         struct bfad_s         *bfad = im_port->bfad;
 288         struct bfa_tskim_s *tskim;
 289         struct bfad_itnim_s   *itnim;
 290         struct bfa_itnim_s *bfa_itnim;
 291         DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wq);
 292         int             rc = SUCCESS;
 293         unsigned long   flags;
 294         enum bfi_tskim_status task_status;
 295         struct scsi_lun scsilun;
 296
 297         spin_lock_irqsave(&bfad->bfad_lock, flags);
 298         itnim = itnim_data->itnim;
 299         if (!itnim) {
 300                 spin_unlock_irqrestore(&bfad->bfad_lock, flags);
 301                 rc = FAILED;
 302                 goto out;
 303         }
 304
 305         tskim = bfa_tskim_alloc(&bfad->bfa, (struct bfad_tskim_s *) cmnd);
 306         if (!tskim) {
 307                 BFA_LOG(KERN_ERR, bfad, bfa_log_level,
 308                                 "LUN reset, fail to allocate tskim");
 309                 spin_unlock_irqrestore(&bfad->bfad_lock, flags);
 310                 rc = FAILED;
 311                 goto out;
 312         }
 313
 314         /*
 315          * Set host_scribble to NULL to avoid aborting a task command
 316          * if happens.
 317          */
 318         cmnd->host_scribble = NULL;
 319         cmnd->SCp.ptr = (char *)&wq;
 320         cmnd->SCp.Status = 0;
 321         bfa_itnim = bfa_fcs_itnim_get_halitn(&itnim->fcs_itnim);
 322         int_to_scsilun(cmnd->device->lun, &scsilun);
 323         bfa_tskim_start(tskim, bfa_itnim, scsilun,
 324                             FCP_TM_LUN_RESET, BFAD_LUN_RESET_TMO);
 325         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
 326
 327         wait_event(wq, test_bit(IO_DONE_BIT,
 328                         (unsigned long *)&cmnd->SCp.Status));
 329
 330         task_status = cmnd->SCp.Status >> 1;
 331         if (task_status != BFI_TSKIM_STS_OK) {
 332                 BFA_LOG(KERN_ERR, bfad, bfa_log_level,
 333                         "LUN reset failure, status: %d\n", task_status);
 334                 rc = FAILED;
 335         }
 336
 337 out:
 338         return rc;
 339 }
 340
 341 /*
 342  * Scsi_Host template entry, resets the bus and abort all commands.
 343  */
 344 static int
 345 bfad_im_reset_bus_handler(struct scsi_cmnd *cmnd)
 346 {
 347         struct Scsi_Host *shost = cmnd->device->host;
 348         struct bfad_im_port_s *im_port =
 349                                 (struct bfad_im_port_s *) shost->hostdata[0];
 350         struct bfad_s         *bfad = im_port->bfad;
 351         struct bfad_itnim_s   *itnim;
 352         unsigned long   flags;
 353         u32        i, rc, err_cnt = 0;
 354         DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wq);
 355         enum bfi_tskim_status task_status;
 356
 357         spin_lock_irqsave(&bfad->bfad_lock, flags);
 358         for (i = 0; i < MAX_FCP_TARGET; i++) {
 359                 itnim = bfad_get_itnim(im_port, i);
 360                 if (itnim) {
 361                         cmnd->SCp.ptr = (char *)&wq;
 362                         rc = bfad_im_target_reset_send(bfad, cmnd, itnim);
 363                         if (rc != BFA_STATUS_OK) {
 364                                 err_cnt++;
 365                                 continue;
 366                         }
 367
 368                         /* wait target reset to complete */
 369                         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
 370                         wait_event(wq, test_bit(IO_DONE_BIT,
 371                                         (unsigned long *)&cmnd->SCp.Status));
 372                         spin_lock_irqsave(&bfad->bfad_lock, flags);
 373
 374                         task_status = cmnd->SCp.Status >> 1;
 375                         if (task_status != BFI_TSKIM_STS_OK) {
 376                                 BFA_LOG(KERN_ERR, bfad, bfa_log_level,
 377                                         "target reset failure,"
 378                                         " status: %d\n", task_status);
 379                                 err_cnt++;
 380                         }
 381                 }
 382         }
 383         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
 384
 385         if (err_cnt)
 386                 return FAILED;
 387
 388         return SUCCESS;
 389 }
 390
 391 /*
 392  * Scsi_Host template entry slave_destroy.
 393  */
 394 static void
 395 bfad_im_slave_destroy(struct scsi_device *sdev)
 396 {
 397         sdev->hostdata = NULL;
 398         return;
 399 }
 400
 401 /*
 402  *  BFA FCS itnim callbacks
 403  */
 404
 405 /*
 406  * BFA FCS itnim alloc callback, after successful PRLI
 407  * Context: Interrupt
 408  */
 409 void
 410 bfa_fcb_itnim_alloc(struct bfad_s *bfad, struct bfa_fcs_itnim_s **itnim,
 411                     struct bfad_itnim_s **itnim_drv)
 412 {
 413         *itnim_drv = kzalloc(sizeof(struct bfad_itnim_s), GFP_ATOMIC);
 414         if (*itnim_drv == NULL)
 415                 return;
 416
 417         (*itnim_drv)->im = bfad->im;
 418         *itnim = &(*itnim_drv)->fcs_itnim;
 419         (*itnim_drv)->state = ITNIM_STATE_NONE;
 420
 421         /*
 422          * Initiaze the itnim_work
 423          */
 424         INIT_WORK(&(*itnim_drv)->itnim_work, bfad_im_itnim_work_handler);
 425         bfad->bfad_flags |= BFAD_RPORT_ONLINE;
 426 }
 427
 428 /*
 429  * BFA FCS itnim free callback.
 430  * Context: Interrupt. bfad_lock is held
 431  */
 432 void
 433 bfa_fcb_itnim_free(struct bfad_s *bfad, struct bfad_itnim_s *itnim_drv)
 434 {
 435         struct bfad_port_s    *port;
 436         wwn_t wwpn;
 437         u32 fcid;
 438         char wwpn_str[32], fcid_str[16];
 439         struct bfad_im_s        *im = itnim_drv->im;
 440
 441         /* online to free state transtion should not happen */
 442         WARN_ON(itnim_drv->state == ITNIM_STATE_ONLINE);
 443
 444         itnim_drv->queue_work = 1;
 445         /* offline request is not yet done, use the same request to free */
 446         if (itnim_drv->state == ITNIM_STATE_OFFLINE_PENDING)
 447                 itnim_drv->queue_work = 0;
 448
 449         itnim_drv->state = ITNIM_STATE_FREE;
 450         port = bfa_fcs_itnim_get_drvport(&itnim_drv->fcs_itnim);
 451         itnim_drv->im_port = port->im_port;
 452         wwpn = bfa_fcs_itnim_get_pwwn(&itnim_drv->fcs_itnim);
 453         fcid = bfa_fcs_itnim_get_fcid(&itnim_drv->fcs_itnim);
 454         wwn2str(wwpn_str, wwpn);
 455         fcid2str(fcid_str, fcid);
 456         BFA_LOG(KERN_INFO, bfad, bfa_log_level,
 457                 "ITNIM FREE scsi%d: FCID: %s WWPN: %s\n",
 458                 port->im_port->shost->host_no,
 459                 fcid_str, wwpn_str);
 460
 461         /* ITNIM processing */
 462         if (itnim_drv->queue_work)
 463                 queue_work(im->drv_workq, &itnim_drv->itnim_work);
 464 }
 465
 466 /*
 467  * BFA FCS itnim online callback.
 468  * Context: Interrupt. bfad_lock is held
 469  */
 470 void
 471 bfa_fcb_itnim_online(struct bfad_itnim_s *itnim_drv)
 472 {
 473         struct bfad_port_s    *port;
 474         struct bfad_im_s        *im = itnim_drv->im;
 475
 476         itnim_drv->bfa_itnim = bfa_fcs_itnim_get_halitn(&itnim_drv->fcs_itnim);
 477         port = bfa_fcs_itnim_get_drvport(&itnim_drv->fcs_itnim);
 478         itnim_drv->state = ITNIM_STATE_ONLINE;
 479         itnim_drv->queue_work = 1;
 480         itnim_drv->im_port = port->im_port;
 481
 482         /* ITNIM processing */
 483         if (itnim_drv->queue_work)
 484                 queue_work(im->drv_workq, &itnim_drv->itnim_work);
 485 }
 486
 487 /*
 488  * BFA FCS itnim offline callback.
 489  * Context: Interrupt. bfad_lock is held
 490  */
 491 void
 492 bfa_fcb_itnim_offline(struct bfad_itnim_s *itnim_drv)
 493 {
 494         struct bfad_port_s    *port;
 495         struct bfad_s *bfad;
 496         struct bfad_im_s        *im = itnim_drv->im;
 497
 498         port = bfa_fcs_itnim_get_drvport(&itnim_drv->fcs_itnim);
 499         bfad = port->bfad;
 500         if ((bfad->pport.flags & BFAD_PORT_DELETE) ||
 501                  (port->flags & BFAD_PORT_DELETE)) {
 502                 itnim_drv->state = ITNIM_STATE_OFFLINE;
 503                 return;
 504         }
 505         itnim_drv->im_port = port->im_port;
 506         itnim_drv->state = ITNIM_STATE_OFFLINE_PENDING;
 507         itnim_drv->queue_work = 1;
 508
 509         /* ITNIM processing */
 510         if (itnim_drv->queue_work)
 511                 queue_work(im->drv_workq, &itnim_drv->itnim_work);
 512 }
 513
 514 /*
 515  * Allocate a Scsi_Host for a port.
 516  */
 517 int
 518 bfad_im_scsi_host_alloc(struct bfad_s *bfad, struct bfad_im_port_s *im_port,
 519                         struct device *dev)
 520 {
 521         int error = 1;
 522
 523         mutex_lock(&bfad_mutex);
 524         if (!idr_pre_get(&bfad_im_port_index, GFP_KERNEL)) {
 525                 mutex_unlock(&bfad_mutex);
 526                 printk(KERN_WARNING "idr_pre_get failure\n");
 527                 goto out;
 528         }
 529
 530         error = idr_get_new(&bfad_im_port_index, im_port,
 531                                          &im_port->idr_id);
 532         if (error) {
 533                 mutex_unlock(&bfad_mutex);
 534                 printk(KERN_WARNING "idr_get_new failure\n");
 535                 goto out;
 536         }
 537
 538         mutex_unlock(&bfad_mutex);
 539
 540         im_port->shost = bfad_scsi_host_alloc(im_port, bfad);
 541         if (!im_port->shost) {
 542                 error = 1;
 543                 goto out_free_idr;
 544         }
 545
 546         im_port->shost->hostdata[0] = (unsigned long)im_port;
 547         im_port->shost->unique_id = im_port->idr_id;
 548         im_port->shost->this_id = -1;
 549         im_port->shost->max_id = MAX_FCP_TARGET;
 550         im_port->shost->max_lun = MAX_FCP_LUN;
 551         im_port->shost->max_cmd_len = 16;
 552         im_port->shost->can_queue = bfad->cfg_data.ioc_queue_depth;
 553         if (im_port->port->pvb_type == BFAD_PORT_PHYS_BASE)
 554                 im_port->shost->transportt = bfad_im_scsi_transport_template;
 555         else
 556                 im_port->shost->transportt =
 557                                 bfad_im_scsi_vport_transport_template;
 558
 559         error = scsi_add_host_with_dma(im_port->shost, dev, &bfad->pcidev->dev);
 560         if (error) {
 561                 printk(KERN_WARNING "scsi_add_host failure %d\n", error);
 562                 goto out_fc_rel;
 563         }
 564
 565         return 0;
 566
 567 out_fc_rel:
 568         scsi_host_put(im_port->shost);
 569         im_port->shost = NULL;
 570 out_free_idr:
 571         mutex_lock(&bfad_mutex);
 572         idr_remove(&bfad_im_port_index, im_port->idr_id);
 573         mutex_unlock(&bfad_mutex);
 574 out:
 575         return error;
 576 }
 577
 578 void
 579 bfad_im_scsi_host_free(struct bfad_s *bfad, struct bfad_im_port_s *im_port)
 580 {
 581         bfa_trc(bfad, bfad->inst_no);
 582         BFA_LOG(KERN_INFO, bfad, bfa_log_level, "Free scsi%d\n",
 583                         im_port->shost->host_no);
 584
 585         fc_remove_host(im_port->shost);
 586
 587         scsi_remove_host(im_port->shost);
 588         scsi_host_put(im_port->shost);
 589
 590         mutex_lock(&bfad_mutex);
 591         idr_remove(&bfad_im_port_index, im_port->idr_id);
 592         mutex_unlock(&bfad_mutex);
 593 }
 594
 595 static void
 596 bfad_im_port_delete_handler(struct work_struct *work)
 597 {
 598         struct bfad_im_port_s *im_port =
 599                 container_of(work, struct bfad_im_port_s, port_delete_work);
 600
 601         if (im_port->port->pvb_type != BFAD_PORT_PHYS_BASE) {
 602                 im_port->flags |= BFAD_PORT_DELETE;
 603                 fc_vport_terminate(im_port->fc_vport);
 604         }
 605 }
 606
 607 bfa_status_t
 608 bfad_im_port_new(struct bfad_s *bfad, struct bfad_port_s *port)
 609 {
 610         int             rc = BFA_STATUS_OK;
 611         struct bfad_im_port_s *im_port;
 612
 613         im_port = kzalloc(sizeof(struct bfad_im_port_s), GFP_ATOMIC);
 614         if (im_port == NULL) {
 615                 rc = BFA_STATUS_ENOMEM;
 616                 goto ext;
 617         }
 618         port->im_port = im_port;
 619         im_port->port = port;
 620         im_port->bfad = bfad;
 621
 622         INIT_WORK(&im_port->port_delete_work, bfad_im_port_delete_handler);
 623         INIT_LIST_HEAD(&im_port->itnim_mapped_list);
 624         INIT_LIST_HEAD(&im_port->binding_list);
 625
 626 ext:
 627         return rc;
 628 }
 629
 630 void
 631 bfad_im_port_delete(struct bfad_s *bfad, struct bfad_port_s *port)
 632 {
 633         struct bfad_im_port_s *im_port = port->im_port;
 634
 635         queue_work(bfad->im->drv_workq,
 636                                 &im_port->port_delete_work);
 637 }
 638
 639 void
 640 bfad_im_port_clean(struct bfad_im_port_s *im_port)
 641 {
 642         struct bfad_fcp_binding *bp, *bp_new;
 643         unsigned long flags;
 644         struct bfad_s *bfad =  im_port->bfad;
 645
 646         spin_lock_irqsave(&bfad->bfad_lock, flags);
 647         list_for_each_entry_safe(bp, bp_new, &im_port->binding_list,
 648                                         list_entry) {
 649                 list_del(&bp->list_entry);
 650                 kfree(bp);
 651         }
 652
 653         /* the itnim_mapped_list must be empty at this time */
 654         WARN_ON(!list_empty(&im_port->itnim_mapped_list));
 655
 656         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
 657 }
 658
 659 bfa_status_t
 660 bfad_im_probe(struct bfad_s *bfad)
 661 {
 662         struct bfad_im_s      *im;
 663         bfa_status_t    rc = BFA_STATUS_OK;
 664
 665         im = kzalloc(sizeof(struct bfad_im_s), GFP_KERNEL);
 666         if (im == NULL) {
 667                 rc = BFA_STATUS_ENOMEM;
 668                 goto ext;
 669         }
 670
 671         bfad->im = im;
 672         im->bfad = bfad;
 673
 674         if (bfad_thread_workq(bfad) != BFA_STATUS_OK) {
 675                 kfree(im);
 676                 rc = BFA_STATUS_FAILED;
 677         }
 678
 679 ext:
 680         return rc;
 681 }
 682
 683 void
 684 bfad_im_probe_undo(struct bfad_s *bfad)
 685 {
 686         if (bfad->im) {
 687                 bfad_destroy_workq(bfad->im);
 688                 kfree(bfad->im);
 689                 bfad->im = NULL;
 690         }
 691 }
 692
 693 struct Scsi_Host *
 694 bfad_scsi_host_alloc(struct bfad_im_port_s *im_port, struct bfad_s *bfad)
 695 {
 696         struct scsi_host_template *sht;
 697
 698         if (im_port->port->pvb_type == BFAD_PORT_PHYS_BASE)
 699                 sht = &bfad_im_scsi_host_template;
 700         else
 701                 sht = &bfad_im_vport_template;
 702
 703         sht->sg_tablesize = bfad->cfg_data.io_max_sge;
 704
 705         return scsi_host_alloc(sht, sizeof(unsigned long));
 706 }
 707
 708 void
 709 bfad_scsi_host_free(struct bfad_s *bfad, struct bfad_im_port_s *im_port)
 710 {
 711         if (!(im_port->flags & BFAD_PORT_DELETE))
 712                 flush_workqueue(bfad->im->drv_workq);
 713         bfad_im_scsi_host_free(im_port->bfad, im_port);
 714         bfad_im_port_clean(im_port);
 715         kfree(im_port);
 716 }
 717
 718 void
 719 bfad_destroy_workq(struct bfad_im_s *im)
 720 {
 721         if (im && im->drv_workq) {
 722                 flush_workqueue(im->drv_workq);
 723                 destroy_workqueue(im->drv_workq);
 724                 im->drv_workq = NULL;
 725         }
 726 }
 727
 728 bfa_status_t
 729 bfad_thread_workq(struct bfad_s *bfad)
 730 {
 731         struct bfad_im_s      *im = bfad->im;
 732
 733         bfa_trc(bfad, 0);
 734         snprintf(im->drv_workq_name, KOBJ_NAME_LEN, "bfad_wq_%d",
 735                  bfad->inst_no);
 736         im->drv_workq = create_singlethread_workqueue(im->drv_workq_name);
 737         if (!im->drv_workq)
 738                 return BFA_STATUS_FAILED;
 739
 740         return BFA_STATUS_OK;
 741 }
 742
 743 /*
 744  * Scsi_Host template entry.
 745  *
 746  * Description:
 747  * OS entry point to adjust the queue_depths on a per-device basis.
 748  * Called once per device during the bus scan.
 749  * Return non-zero if fails.
 750  */
 751 static int
 752 bfad_im_slave_configure(struct scsi_device *sdev)
 753 {
 754         if (sdev->tagged_supported)
 755                 scsi_activate_tcq(sdev, bfa_lun_queue_depth);
 756         else
 757                 scsi_deactivate_tcq(sdev, bfa_lun_queue_depth);
 758
 759         return 0;
 760 }
 761
 762 struct scsi_host_template bfad_im_scsi_host_template = {
 763         .module = THIS_MODULE,
 764         .name = BFAD_DRIVER_NAME,
 765         .info = bfad_im_info,
 766         .queuecommand = bfad_im_queuecommand,
 767         .eh_abort_handler = bfad_im_abort_handler,
 768         .eh_device_reset_handler = bfad_im_reset_lun_handler,
 769         .eh_bus_reset_handler = bfad_im_reset_bus_handler,
 770
 771         .slave_alloc = bfad_im_slave_alloc,
 772         .slave_configure = bfad_im_slave_configure,
 773         .slave_destroy = bfad_im_slave_destroy,
 774
 775         .this_id = -1,
 776         .sg_tablesize = BFAD_IO_MAX_SGE,
 777         .cmd_per_lun = 3,
 778         .use_clustering = ENABLE_CLUSTERING,
 779         .shost_attrs = bfad_im_host_attrs,
 780         .max_sectors = 0xFFFF,
 781 };
 782
 783 struct scsi_host_template bfad_im_vport_template = {
 784         .module = THIS_MODULE,
 785         .name = BFAD_DRIVER_NAME,
 786         .info = bfad_im_info,
 787         .queuecommand = bfad_im_queuecommand,
 788         .eh_abort_handler = bfad_im_abort_handler,
 789         .eh_device_reset_handler = bfad_im_reset_lun_handler,
 790         .eh_bus_reset_handler = bfad_im_reset_bus_handler,
 791
 792         .slave_alloc = bfad_im_slave_alloc,
 793         .slave_configure = bfad_im_slave_configure,
 794         .slave_destroy = bfad_im_slave_destroy,
 795
 796         .this_id = -1,
 797         .sg_tablesize = BFAD_IO_MAX_SGE,
 798         .cmd_per_lun = 3,
 799         .use_clustering = ENABLE_CLUSTERING,
 800         .shost_attrs = bfad_im_vport_attrs,
 801         .max_sectors = 0xFFFF,
 802 };
 803
 804 bfa_status_t
 805 bfad_im_module_init(void)
 806 {
 807         bfad_im_scsi_transport_template =
 808                 fc_attach_transport(&bfad_im_fc_function_template);
 809         if (!bfad_im_scsi_transport_template)
 810                 return BFA_STATUS_ENOMEM;
 811
 812         bfad_im_scsi_vport_transport_template =
 813                 fc_attach_transport(&bfad_im_vport_fc_function_template);
 814         if (!bfad_im_scsi_vport_transport_template) {
 815                 fc_release_transport(bfad_im_scsi_transport_template);
 816                 return BFA_STATUS_ENOMEM;
 817         }
 818
 819         return BFA_STATUS_OK;
 820 }
 821
 822 void
 823 bfad_im_module_exit(void)
 824 {
 825         if (bfad_im_scsi_transport_template)
 826                 fc_release_transport(bfad_im_scsi_transport_template);
 827
 828         if (bfad_im_scsi_vport_transport_template)
 829                 fc_release_transport(bfad_im_scsi_vport_transport_template);
 830 }
 831
 832 void
 833 bfad_ramp_up_qdepth(struct bfad_itnim_s *itnim, struct scsi_device *sdev)
 834 {
 835         struct scsi_device *tmp_sdev;
 836
 837         if (((jiffies - itnim->last_ramp_up_time) >
 838                 BFA_QUEUE_FULL_RAMP_UP_TIME * HZ) &&
 839                 ((jiffies - itnim->last_queue_full_time) >
 840                 BFA_QUEUE_FULL_RAMP_UP_TIME * HZ)) {
 841                 shost_for_each_device(tmp_sdev, sdev->host) {
 842                         if (bfa_lun_queue_depth > tmp_sdev->queue_depth) {
 843                                 if (tmp_sdev->id != sdev->id)
 844                                         continue;
 845                                 if (tmp_sdev->ordered_tags)
 846                                         scsi_adjust_queue_depth(tmp_sdev,
 847                                                 MSG_ORDERED_TAG,
 848                                                 tmp_sdev->queue_depth + 1);
 849                                 else
 850                                         scsi_adjust_queue_depth(tmp_sdev,
 851                                                 MSG_SIMPLE_TAG,
 852                                                 tmp_sdev->queue_depth + 1);
 853
 854                                 itnim->last_ramp_up_time = jiffies;
 855                         }
 856                 }
 857         }
 858 }
 859
 860 void
 861 bfad_handle_qfull(struct bfad_itnim_s *itnim, struct scsi_device *sdev)
 862 {
 863         struct scsi_device *tmp_sdev;
 864
 865         itnim->last_queue_full_time = jiffies;
 866
 867         shost_for_each_device(tmp_sdev, sdev->host) {
 868                 if (tmp_sdev->id != sdev->id)
 869                         continue;
 870                 scsi_track_queue_full(tmp_sdev, tmp_sdev->queue_depth - 1);
 871         }
 872 }
 873
 874 struct bfad_itnim_s *
 875 bfad_get_itnim(struct bfad_im_port_s *im_port, int id)
 876 {
 877         struct bfad_itnim_s   *itnim = NULL;
 878
 879         /* Search the mapped list for this target ID */
 880         list_for_each_entry(itnim, &im_port->itnim_mapped_list, list_entry) {
 881                 if (id == itnim->scsi_tgt_id)
 882                         return itnim;
 883         }
 884
 885         return NULL;
 886 }
 887
 888 /*
 889  * Scsi_Host template entry slave_alloc
 890  */
 891 static int
 892 bfad_im_slave_alloc(struct scsi_device *sdev)
 893 {
 894         struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
 895
 896         if (!rport || fc_remote_port_chkready(rport))
 897                 return -ENXIO;
 898
 899         sdev->hostdata = rport->dd_data;
 900
 901         return 0;
 902 }
 903
 904 static u32
 905 bfad_im_supported_speeds(struct bfa_s *bfa)
 906 {
 907         struct bfa_ioc_attr_s *ioc_attr;
 908         u32 supported_speed = 0;
 909
 910         ioc_attr = kzalloc(sizeof(struct bfa_ioc_attr_s), GFP_KERNEL);
 911         if (!ioc_attr)
 912                 return 0;
 913
 914         bfa_ioc_get_attr(&bfa->ioc, ioc_attr);
 915         if (ioc_attr->adapter_attr.max_speed == BFA_PORT_SPEED_16GBPS)
 916                 supported_speed |=  FC_PORTSPEED_16GBIT | FC_PORTSPEED_8GBIT |
 917                                 FC_PORTSPEED_4GBIT | FC_PORTSPEED_2GBIT;
 918         else if (ioc_attr->adapter_attr.max_speed == BFA_PORT_SPEED_8GBPS) {
 919                 if (ioc_attr->adapter_attr.is_mezz) {
 920                         supported_speed |= FC_PORTSPEED_8GBIT |
 921                                 FC_PORTSPEED_4GBIT |
 922                                 FC_PORTSPEED_2GBIT | FC_PORTSPEED_1GBIT;
 923                 } else {
 924                         supported_speed |= FC_PORTSPEED_8GBIT |
 925                                 FC_PORTSPEED_4GBIT |
 926                                 FC_PORTSPEED_2GBIT;
 927                 }
 928         } else if (ioc_attr->adapter_attr.max_speed == BFA_PORT_SPEED_4GBPS) {
 929                 supported_speed |=  FC_PORTSPEED_4GBIT | FC_PORTSPEED_2GBIT |
 930                                 FC_PORTSPEED_1GBIT;
 931         } else if (ioc_attr->adapter_attr.max_speed == BFA_PORT_SPEED_10GBPS) {
 932                 supported_speed |= FC_PORTSPEED_10GBIT;
 933         }
 934         kfree(ioc_attr);
 935         return supported_speed;
 936 }
 937
 938 void
 939 bfad_fc_host_init(struct bfad_im_port_s *im_port)
 940 {
 941         struct Scsi_Host *host = im_port->shost;
 942         struct bfad_s         *bfad = im_port->bfad;
 943         struct bfad_port_s    *port = im_port->port;
 944         char symname[BFA_SYMNAME_MAXLEN];
 945         struct bfa_fcport_s *fcport = BFA_FCPORT_MOD(&bfad->bfa);
 946
 947         fc_host_node_name(host) =
 948                 cpu_to_be64((bfa_fcs_lport_get_nwwn(port->fcs_port)));
 949         fc_host_port_name(host) =
 950                 cpu_to_be64((bfa_fcs_lport_get_pwwn(port->fcs_port)));
 951         fc_host_max_npiv_vports(host) = bfa_lps_get_max_vport(&bfad->bfa);
 952
 953         fc_host_supported_classes(host) = FC_COS_CLASS3;
 954
 955         memset(fc_host_supported_fc4s(host), 0,
 956                sizeof(fc_host_supported_fc4s(host)));
 957         if (supported_fc4s & BFA_LPORT_ROLE_FCP_IM)
 958                 /* For FCP type 0x08 */
 959                 fc_host_supported_fc4s(host)[2] = 1;
 960         /* For fibre channel services type 0x20 */
 961         fc_host_supported_fc4s(host)[7] = 1;
 962
 963         strncpy(symname, bfad->bfa_fcs.fabric.bport.port_cfg.sym_name.symname,
 964                 BFA_SYMNAME_MAXLEN);
 965         sprintf(fc_host_symbolic_name(host), "%s", symname);
 966
 967         fc_host_supported_speeds(host) = bfad_im_supported_speeds(&bfad->bfa);
 968         fc_host_maxframe_size(host) = fcport->cfg.maxfrsize;
 969 }
 970
 971 static void
 972 bfad_im_fc_rport_add(struct bfad_im_port_s *im_port, struct bfad_itnim_s *itnim)
 973 {
 974         struct fc_rport_identifiers rport_ids;
 975         struct fc_rport *fc_rport;
 976         struct bfad_itnim_data_s *itnim_data;
 977
 978         rport_ids.node_name =
 979                 cpu_to_be64(bfa_fcs_itnim_get_nwwn(&itnim->fcs_itnim));
 980         rport_ids.port_name =
 981                 cpu_to_be64(bfa_fcs_itnim_get_pwwn(&itnim->fcs_itnim));
 982         rport_ids.port_id =
 983                 bfa_hton3b(bfa_fcs_itnim_get_fcid(&itnim->fcs_itnim));
 984         rport_ids.roles = FC_RPORT_ROLE_UNKNOWN;
 985
 986         itnim->fc_rport = fc_rport =
 987                 fc_remote_port_add(im_port->shost, 0, &rport_ids);
 988
 989         if (!fc_rport)
 990                 return;
 991
 992         fc_rport->maxframe_size =
 993                 bfa_fcs_itnim_get_maxfrsize(&itnim->fcs_itnim);
 994         fc_rport->supported_classes = bfa_fcs_itnim_get_cos(&itnim->fcs_itnim);
 995
 996         itnim_data = fc_rport->dd_data;
 997         itnim_data->itnim = itnim;
 998
 999         rport_ids.roles |= FC_RPORT_ROLE_FCP_TARGET;
1000
1001         if (rport_ids.roles != FC_RPORT_ROLE_UNKNOWN)
1002                 fc_remote_port_rolechg(fc_rport, rport_ids.roles);
1003
1004         if ((fc_rport->scsi_target_id != -1)
1005             && (fc_rport->scsi_target_id < MAX_FCP_TARGET))
1006                 itnim->scsi_tgt_id = fc_rport->scsi_target_id;
1007
1008         return;
1009 }
1010
1011 /*
1012  * Work queue handler using FC transport service
1013 * Context: kernel
1014  */
1015 static void
1016 bfad_im_itnim_work_handler(struct work_struct *work)
1017 {
1018         struct bfad_itnim_s   *itnim = container_of(work, struct bfad_itnim_s,
1019                                                         itnim_work);
1020         struct bfad_im_s      *im = itnim->im;
1021         struct bfad_s         *bfad = im->bfad;
1022         struct bfad_im_port_s *im_port;
1023         unsigned long   flags;
1024         struct fc_rport *fc_rport;
1025         wwn_t wwpn;
1026         u32 fcid;
1027         char wwpn_str[32], fcid_str[16];
1028
1029         spin_lock_irqsave(&bfad->bfad_lock, flags);
1030         im_port = itnim->im_port;
1031         bfa_trc(bfad, itnim->state);
1032         switch (itnim->state) {
1033         case ITNIM_STATE_ONLINE:
1034                 if (!itnim->fc_rport) {
1035                         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
1036                         bfad_im_fc_rport_add(im_port, itnim);
1037                         spin_lock_irqsave(&bfad->bfad_lock, flags);
1038                         wwpn = bfa_fcs_itnim_get_pwwn(&itnim->fcs_itnim);
1039                         fcid = bfa_fcs_itnim_get_fcid(&itnim->fcs_itnim);
1040                         wwn2str(wwpn_str, wwpn);
1041                         fcid2str(fcid_str, fcid);
1042                         list_add_tail(&itnim->list_entry,
1043                                 &im_port->itnim_mapped_list);
1044                         BFA_LOG(KERN_INFO, bfad, bfa_log_level,
1045                                 "ITNIM ONLINE Target: %d:0:%d "
1046                                 "FCID: %s WWPN: %s\n",
1047                                 im_port->shost->host_no,
1048                                 itnim->scsi_tgt_id,
1049                                 fcid_str, wwpn_str);
1050                 } else {
1051                         printk(KERN_WARNING
1052                                 "%s: itnim %llx is already in online state\n",
1053                                 __func__,
1054                                 bfa_fcs_itnim_get_pwwn(&itnim->fcs_itnim));
1055                 }
1056
1057                 break;
1058         case ITNIM_STATE_OFFLINE_PENDING:
1059                 itnim->state = ITNIM_STATE_OFFLINE;
1060                 if (itnim->fc_rport) {
1061                         fc_rport = itnim->fc_rport;
1062                         ((struct bfad_itnim_data_s *)
1063                                 fc_rport->dd_data)->itnim = NULL;
1064                         itnim->fc_rport = NULL;
1065                         if (!(im_port->port->flags & BFAD_PORT_DELETE)) {
1066                                 spin_unlock_irqrestore(&bfad->bfad_lock, flags);
1067                                 fc_rport->dev_loss_tmo =
1068                                         bfa_fcpim_path_tov_get(&bfad->bfa) + 1;
1069                                 fc_remote_port_delete(fc_rport);
1070                                 spin_lock_irqsave(&bfad->bfad_lock, flags);
1071                         }
1072                         wwpn = bfa_fcs_itnim_get_pwwn(&itnim->fcs_itnim);
1073                         fcid = bfa_fcs_itnim_get_fcid(&itnim->fcs_itnim);
1074                         wwn2str(wwpn_str, wwpn);
1075                         fcid2str(fcid_str, fcid);
1076                         list_del(&itnim->list_entry);
1077                         BFA_LOG(KERN_INFO, bfad, bfa_log_level,
1078                                 "ITNIM OFFLINE Target: %d:0:%d "
1079                                 "FCID: %s WWPN: %s\n",
1080                                 im_port->shost->host_no,
1081                                 itnim->scsi_tgt_id,
1082                                 fcid_str, wwpn_str);
1083                 }
1084                 break;
1085         case ITNIM_STATE_FREE:
1086                 if (itnim->fc_rport) {
1087                         fc_rport = itnim->fc_rport;
1088                         ((struct bfad_itnim_data_s *)
1089                                 fc_rport->dd_data)->itnim = NULL;
1090                         itnim->fc_rport = NULL;
1091                         if (!(im_port->port->flags & BFAD_PORT_DELETE)) {
1092                                 spin_unlock_irqrestore(&bfad->bfad_lock, flags);
1093                                 fc_rport->dev_loss_tmo =
1094                                         bfa_fcpim_path_tov_get(&bfad->bfa) + 1;
1095                                 fc_remote_port_delete(fc_rport);
1096                                 spin_lock_irqsave(&bfad->bfad_lock, flags);
1097                         }
1098                         list_del(&itnim->list_entry);
1099                 }
1100
1101                 kfree(itnim);
1102                 break;
1103         default:
1104                 WARN_ON(1);
1105                 break;
1106         }
1107
1108         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
1109 }
1110
1111 /*
1112  * Scsi_Host template entry, queue a SCSI command to the BFAD.
1113  */
1114 static int
1115 bfad_im_queuecommand_lck(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *))
1116 {
1117         struct bfad_im_port_s *im_port =
1118                 (struct bfad_im_port_s *) cmnd->device->host->hostdata[0];
1119         struct bfad_s         *bfad = im_port->bfad;
1120         struct bfad_itnim_data_s *itnim_data = cmnd->device->hostdata;
1121         struct bfad_itnim_s   *itnim;
1122         struct bfa_ioim_s *hal_io;
1123         unsigned long   flags;
1124         int             rc;
1125         int       sg_cnt = 0;
1126         struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
1127
1128         rc = fc_remote_port_chkready(rport);
1129         if (rc) {
1130                 cmnd->result = rc;
1131                 done(cmnd);
1132                 return 0;
1133         }
1134
1135         sg_cnt = scsi_dma_map(cmnd);
1136         if (sg_cnt < 0)
1137                 return SCSI_MLQUEUE_HOST_BUSY;
1138
1139         cmnd->scsi_done = done;
1140
1141         spin_lock_irqsave(&bfad->bfad_lock, flags);
1142         if (!(bfad->bfad_flags & BFAD_HAL_START_DONE)) {
1143                 printk(KERN_WARNING
1144                         "bfad%d, queuecommand %p %x failed, BFA stopped\n",
1145                        bfad->inst_no, cmnd, cmnd->cmnd[0]);
1146                 cmnd->result = ScsiResult(DID_NO_CONNECT, 0);
1147                 goto out_fail_cmd;
1148         }
1149
1150
1151         itnim = itnim_data->itnim;
1152         if (!itnim) {
1153                 cmnd->result = ScsiResult(DID_IMM_RETRY, 0);
1154                 goto out_fail_cmd;
1155         }
1156
1157         hal_io = bfa_ioim_alloc(&bfad->bfa, (struct bfad_ioim_s *) cmnd,
1158                                     itnim->bfa_itnim, sg_cnt);
1159         if (!hal_io) {
1160                 printk(KERN_WARNING "hal_io failure\n");
1161                 spin_unlock_irqrestore(&bfad->bfad_lock, flags);
1162                 scsi_dma_unmap(cmnd);
1163                 return SCSI_MLQUEUE_HOST_BUSY;
1164         }
1165
1166         cmnd->host_scribble = (char *)hal_io;
1167         bfa_ioim_start(hal_io);
1168         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
1169
1170         return 0;
1171
1172 out_fail_cmd:
1173         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
1174         scsi_dma_unmap(cmnd);
1175         if (done)
1176                 done(cmnd);
1177
1178         return 0;
1179 }
1180
1181 static DEF_SCSI_QCMD(bfad_im_queuecommand)
1182
1183 void
1184 bfad_rport_online_wait(struct bfad_s *bfad)
1185 {
1186         int i;
1187         int rport_delay = 10;
1188
1189         for (i = 0; !(bfad->bfad_flags & BFAD_PORT_ONLINE)
1190                 && i < bfa_linkup_delay; i++) {
1191                 set_current_state(TASK_UNINTERRUPTIBLE);
1192                 schedule_timeout(HZ);
1193         }
1194
1195         if (bfad->bfad_flags & BFAD_PORT_ONLINE) {
1196                 rport_delay = rport_delay < bfa_linkup_delay ?
1197                         rport_delay : bfa_linkup_delay;
1198                 for (i = 0; !(bfad->bfad_flags & BFAD_RPORT_ONLINE)
1199                         && i < rport_delay; i++) {
1200                         set_current_state(TASK_UNINTERRUPTIBLE);
1201                         schedule_timeout(HZ);
1202                 }
1203
1204                 if (rport_delay > 0 && (bfad->bfad_flags & BFAD_RPORT_ONLINE)) {
1205                         set_current_state(TASK_UNINTERRUPTIBLE);
1206                         schedule_timeout(rport_delay * HZ);
1207                 }
1208         }
1209 }
1210
1211 int
1212 bfad_get_linkup_delay(struct bfad_s *bfad)
1213 {
1214         u8              nwwns = 0;
1215         wwn_t           wwns[BFA_PREBOOT_BOOTLUN_MAX];
1216         int             linkup_delay;
1217
1218         /*
1219          * Querying for the boot target port wwns
1220          * -- read from boot information in flash.
1221          * If nwwns > 0 => boot over SAN and set linkup_delay = 30
1222          * else => local boot machine set linkup_delay = 0
1223          */
1224
1225         bfa_iocfc_get_bootwwns(&bfad->bfa, &nwwns, wwns);
1226
1227         if (nwwns > 0)
1228                 /* If Boot over SAN set linkup_delay = 30sec */
1229                 linkup_delay = 30;
1230         else
1231                 /* If local boot; no linkup_delay */
1232                 linkup_delay = 0;
1233
1234         return linkup_delay;
1235 }