drivers/scsi/bfa/bfad_im.c

   1 /*
   2  * Copyright (c) 2005-2014 Brocade Communications Systems, Inc.
   3  * Copyright (c) 2014- QLogic Corporation.
   4  * All rights reserved
   5  * www.qlogic.com
   6  *
   7  * Linux driver for QLogic BR-series Fibre Channel Host Bus Adapter.
   8  *
   9  * This program is free software; you can redistribute it and/or modify it
  10  * under the terms of the GNU General Public License (GPL) Version 2 as
  11  * published by the Free Software Foundation
  12  *
  13  * This program is distributed in the hope that it will be useful, but
  14  * WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * General Public License for more details.
  17  */
  18
  19 /*
  20  *  bfad_im.c Linux driver IM module.
  21  */
  22
  23 #include <linux/export.h>
  24
  25 #include "bfad_drv.h"
  26 #include "bfad_im.h"
  27 #include "bfa_fcs.h"
  28
  29 BFA_TRC_FILE(LDRV, IM);
  30
  31 DEFINE_IDR(bfad_im_port_index);
  32 struct scsi_transport_template *bfad_im_scsi_transport_template;
  33 struct scsi_transport_template *bfad_im_scsi_vport_transport_template;
  34 static void bfad_im_itnim_work_handler(struct work_struct *work);
  35 static int bfad_im_queuecommand(struct Scsi_Host *h, struct scsi_cmnd *cmnd);
  36 static int bfad_im_slave_alloc(struct scsi_device *sdev);
  37 static void bfad_im_fc_rport_add(struct bfad_im_port_s  *im_port,
  38                                 struct bfad_itnim_s *itnim);
  39
  40 void
  41 bfa_cb_ioim_done(void *drv, struct bfad_ioim_s *dio,
  42                         enum bfi_ioim_status io_status, u8 scsi_status,
  43                         int sns_len, u8 *sns_info, s32 residue)
  44 {
  45         struct scsi_cmnd *cmnd = (struct scsi_cmnd *)dio;
  46         struct bfad_s         *bfad = drv;
  47         struct bfad_itnim_data_s *itnim_data;
  48         struct bfad_itnim_s *itnim;
  49         u8         host_status = DID_OK;
  50
  51         switch (io_status) {
  52         case BFI_IOIM_STS_OK:
  53                 bfa_trc(bfad, scsi_status);
  54                 scsi_set_resid(cmnd, 0);
  55
  56                 if (sns_len > 0) {
  57                         bfa_trc(bfad, sns_len);
  58                         if (sns_len > SCSI_SENSE_BUFFERSIZE)
  59                                 sns_len = SCSI_SENSE_BUFFERSIZE;
  60                         memcpy(cmnd->sense_buffer, sns_info, sns_len);
  61                 }
  62
  63                 if (residue > 0) {
  64                         bfa_trc(bfad, residue);
  65                         scsi_set_resid(cmnd, residue);
  66                         if (!sns_len && (scsi_status == SAM_STAT_GOOD) &&
  67                                 (scsi_bufflen(cmnd) - residue) <
  68                                         cmnd->underflow) {
  69                                 bfa_trc(bfad, 0);
  70                                 host_status = DID_ERROR;
  71                         }
  72                 }
  73                 cmnd->result = ScsiResult(host_status, scsi_status);
  74
  75                 break;
  76
  77         case BFI_IOIM_STS_TIMEDOUT:
  78                 host_status = DID_TIME_OUT;
  79                 cmnd->result = ScsiResult(host_status, 0);
  80                 break;
  81         case BFI_IOIM_STS_PATHTOV:
  82                 host_status = DID_TRANSPORT_DISRUPTED;
  83                 cmnd->result = ScsiResult(host_status, 0);
  84                 break;
  85         default:
  86                 host_status = DID_ERROR;
  87                 cmnd->result = ScsiResult(host_status, 0);
  88         }
  89
  90         /* Unmap DMA, if host is NULL, it means a scsi passthru cmd */
  91         if (cmnd->device->host != NULL)
  92                 scsi_dma_unmap(cmnd);
  93
  94         cmnd->host_scribble = NULL;
  95         bfa_trc(bfad, cmnd->result);
  96
  97         itnim_data = cmnd->device->hostdata;
  98         if (itnim_data) {
  99                 itnim = itnim_data->itnim;
 100                 if (!cmnd->result && itnim &&
 101                          (bfa_lun_queue_depth > cmnd->device->queue_depth)) {
 102                         /* Queue depth adjustment for good status completion */
 103                         bfad_ramp_up_qdepth(itnim, cmnd->device);
 104                 } else if (cmnd->result == SAM_STAT_TASK_SET_FULL && itnim) {
 105                         /* qfull handling */
 106                         bfad_handle_qfull(itnim, cmnd->device);
 107                 }
 108         }
 109
 110         cmnd->scsi_done(cmnd);
 111 }
 112
 113 void
 114 bfa_cb_ioim_good_comp(void *drv, struct bfad_ioim_s *dio)
 115 {
 116         struct scsi_cmnd *cmnd = (struct scsi_cmnd *)dio;
 117         struct bfad_itnim_data_s *itnim_data;
 118         struct bfad_itnim_s *itnim;
 119
 120         cmnd->result = ScsiResult(DID_OK, SCSI_STATUS_GOOD);
 121
 122         /* Unmap DMA, if host is NULL, it means a scsi passthru cmd */
 123         if (cmnd->device->host != NULL)
 124                 scsi_dma_unmap(cmnd);
 125
 126         cmnd->host_scribble = NULL;
 127
 128         /* Queue depth adjustment */
 129         if (bfa_lun_queue_depth > cmnd->device->queue_depth) {
 130                 itnim_data = cmnd->device->hostdata;
 131                 if (itnim_data) {
 132                         itnim = itnim_data->itnim;
 133                         if (itnim)
 134                                 bfad_ramp_up_qdepth(itnim, cmnd->device);
 135                 }
 136         }
 137
 138         cmnd->scsi_done(cmnd);
 139 }
 140
 141 void
 142 bfa_cb_ioim_abort(void *drv, struct bfad_ioim_s *dio)
 143 {
 144         struct scsi_cmnd *cmnd = (struct scsi_cmnd *)dio;
 145         struct bfad_s         *bfad = drv;
 146
 147         cmnd->result = ScsiResult(DID_ERROR, 0);
 148
 149         /* Unmap DMA, if host is NULL, it means a scsi passthru cmd */
 150         if (cmnd->device->host != NULL)
 151                 scsi_dma_unmap(cmnd);
 152
 153         bfa_trc(bfad, cmnd->result);
 154         cmnd->host_scribble = NULL;
 155 }
 156
 157 void
 158 bfa_cb_tskim_done(void *bfad, struct bfad_tskim_s *dtsk,
 159                    enum bfi_tskim_status tsk_status)
 160 {
 161         struct scsi_cmnd *cmnd = (struct scsi_cmnd *)dtsk;
 162         wait_queue_head_t *wq;
 163
 164         cmnd->SCp.Status |= tsk_status << 1;
 165         set_bit(IO_DONE_BIT, (unsigned long *)&cmnd->SCp.Status);
 166         wq = (wait_queue_head_t *) cmnd->SCp.ptr;
 167         cmnd->SCp.ptr = NULL;
 168
 169         if (wq)
 170                 wake_up(wq);
 171 }
 172
 173 /*
 174  *  Scsi_Host_template SCSI host template
 175  */
 176 /*
 177  * Scsi_Host template entry, returns BFAD PCI info.
 178  */
 179 static const char *
 180 bfad_im_info(struct Scsi_Host *shost)
 181 {
 182         static char     bfa_buf[256];
 183         struct bfad_im_port_s *im_port =
 184                         (struct bfad_im_port_s *) shost->hostdata[0];
 185         struct bfad_s *bfad = im_port->bfad;
 186
 187         memset(bfa_buf, 0, sizeof(bfa_buf));
 188         snprintf(bfa_buf, sizeof(bfa_buf),
 189                 "QLogic BR-series FC/FCOE Adapter, hwpath: %s driver: %s",
 190                 bfad->pci_name, BFAD_DRIVER_VERSION);
 191
 192         return bfa_buf;
 193 }
 194
 195 /*
 196  * Scsi_Host template entry, aborts the specified SCSI command.
 197  *
 198  * Returns: SUCCESS or FAILED.
 199  */
 200 static int
 201 bfad_im_abort_handler(struct scsi_cmnd *cmnd)
 202 {
 203         struct Scsi_Host *shost = cmnd->device->host;
 204         struct bfad_im_port_s *im_port =
 205                         (struct bfad_im_port_s *) shost->hostdata[0];
 206         struct bfad_s         *bfad = im_port->bfad;
 207         struct bfa_ioim_s *hal_io;
 208         unsigned long   flags;
 209         u32        timeout;
 210         int             rc = FAILED;
 211
 212         spin_lock_irqsave(&bfad->bfad_lock, flags);
 213         hal_io = (struct bfa_ioim_s *) cmnd->host_scribble;
 214         if (!hal_io) {
 215                 /* IO has been completed, return success */
 216                 rc = SUCCESS;
 217                 goto out;
 218         }
 219         if (hal_io->dio != (struct bfad_ioim_s *) cmnd) {
 220                 rc = FAILED;
 221                 goto out;
 222         }
 223
 224         bfa_trc(bfad, hal_io->iotag);
 225         BFA_LOG(KERN_INFO, bfad, bfa_log_level,
 226                 "scsi%d: abort cmnd %p iotag %x\n",
 227                 im_port->shost->host_no, cmnd, hal_io->iotag);
 228         (void) bfa_ioim_abort(hal_io);
 229         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
 230
 231         /* Need to wait until the command get aborted */
 232         timeout = 10;
 233         while ((struct bfa_ioim_s *) cmnd->host_scribble == hal_io) {
 234                 set_current_state(TASK_UNINTERRUPTIBLE);
 235                 schedule_timeout(timeout);
 236                 if (timeout < 4 * HZ)
 237                         timeout *= 2;
 238         }
 239
 240         cmnd->scsi_done(cmnd);
 241         bfa_trc(bfad, hal_io->iotag);
 242         BFA_LOG(KERN_INFO, bfad, bfa_log_level,
 243                 "scsi%d: complete abort 0x%p iotag 0x%x\n",
 244                 im_port->shost->host_no, cmnd, hal_io->iotag);
 245         return SUCCESS;
 246 out:
 247         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
 248         return rc;
 249 }
 250
 251 static bfa_status_t
 252 bfad_im_target_reset_send(struct bfad_s *bfad, struct scsi_cmnd *cmnd,
 253                      struct bfad_itnim_s *itnim)
 254 {
 255         struct bfa_tskim_s *tskim;
 256         struct bfa_itnim_s *bfa_itnim;
 257         bfa_status_t    rc = BFA_STATUS_OK;
 258         struct scsi_lun scsilun;
 259
 260         tskim = bfa_tskim_alloc(&bfad->bfa, (struct bfad_tskim_s *) cmnd);
 261         if (!tskim) {
 262                 BFA_LOG(KERN_ERR, bfad, bfa_log_level,
 263                         "target reset, fail to allocate tskim\n");
 264                 rc = BFA_STATUS_FAILED;
 265                 goto out;
 266         }
 267
 268         /*
 269          * Set host_scribble to NULL to avoid aborting a task command if
 270          * happens.
 271          */
 272         cmnd->host_scribble = NULL;
 273         cmnd->SCp.Status = 0;
 274         bfa_itnim = bfa_fcs_itnim_get_halitn(&itnim->fcs_itnim);
 275         /*
 276          * bfa_itnim can be NULL if the port gets disconnected and the bfa
 277          * and fcs layers have cleaned up their nexus with the targets and
 278          * the same has not been cleaned up by the shim
 279          */
 280         if (bfa_itnim == NULL) {
 281                 bfa_tskim_free(tskim);
 282                 BFA_LOG(KERN_ERR, bfad, bfa_log_level,
 283                         "target reset, bfa_itnim is NULL\n");
 284                 rc = BFA_STATUS_FAILED;
 285                 goto out;
 286         }
 287
 288         memset(&scsilun, 0, sizeof(scsilun));
 289         bfa_tskim_start(tskim, bfa_itnim, scsilun,
 290                             FCP_TM_TARGET_RESET, BFAD_TARGET_RESET_TMO);
 291 out:
 292         return rc;
 293 }
 294
 295 /*
 296  * Scsi_Host template entry, resets a LUN and abort its all commands.
 297  *
 298  * Returns: SUCCESS or FAILED.
 299  *
 300  */
 301 static int
 302 bfad_im_reset_lun_handler(struct scsi_cmnd *cmnd)
 303 {
 304         struct Scsi_Host *shost = cmnd->device->host;
 305         struct bfad_im_port_s *im_port =
 306                         (struct bfad_im_port_s *) shost->hostdata[0];
 307         struct bfad_itnim_data_s *itnim_data = cmnd->device->hostdata;
 308         struct bfad_s         *bfad = im_port->bfad;
 309         struct bfa_tskim_s *tskim;
 310         struct bfad_itnim_s   *itnim;
 311         struct bfa_itnim_s *bfa_itnim;
 312         DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wq);
 313         int             rc = SUCCESS;
 314         unsigned long   flags;
 315         enum bfi_tskim_status task_status;
 316         struct scsi_lun scsilun;
 317
 318         spin_lock_irqsave(&bfad->bfad_lock, flags);
 319         itnim = itnim_data->itnim;
 320         if (!itnim) {
 321                 spin_unlock_irqrestore(&bfad->bfad_lock, flags);
 322                 rc = FAILED;
 323                 goto out;
 324         }
 325
 326         tskim = bfa_tskim_alloc(&bfad->bfa, (struct bfad_tskim_s *) cmnd);
 327         if (!tskim) {
 328                 BFA_LOG(KERN_ERR, bfad, bfa_log_level,
 329                                 "LUN reset, fail to allocate tskim");
 330                 spin_unlock_irqrestore(&bfad->bfad_lock, flags);
 331                 rc = FAILED;
 332                 goto out;
 333         }
 334
 335         /*
 336          * Set host_scribble to NULL to avoid aborting a task command
 337          * if happens.
 338          */
 339         cmnd->host_scribble = NULL;
 340         cmnd->SCp.ptr = (char *)&wq;
 341         cmnd->SCp.Status = 0;
 342         bfa_itnim = bfa_fcs_itnim_get_halitn(&itnim->fcs_itnim);
 343         /*
 344          * bfa_itnim can be NULL if the port gets disconnected and the bfa
 345          * and fcs layers have cleaned up their nexus with the targets and
 346          * the same has not been cleaned up by the shim
 347          */
 348         if (bfa_itnim == NULL) {
 349                 bfa_tskim_free(tskim);
 350                 BFA_LOG(KERN_ERR, bfad, bfa_log_level,
 351                         "lun reset, bfa_itnim is NULL\n");
 352                 spin_unlock_irqrestore(&bfad->bfad_lock, flags);
 353                 rc = FAILED;
 354                 goto out;
 355         }
 356         int_to_scsilun(cmnd->device->lun, &scsilun);
 357         bfa_tskim_start(tskim, bfa_itnim, scsilun,
 358                             FCP_TM_LUN_RESET, BFAD_LUN_RESET_TMO);
 359         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
 360
 361         wait_event(wq, test_bit(IO_DONE_BIT,
 362                         (unsigned long *)&cmnd->SCp.Status));
 363
 364         task_status = cmnd->SCp.Status >> 1;
 365         if (task_status != BFI_TSKIM_STS_OK) {
 366                 BFA_LOG(KERN_ERR, bfad, bfa_log_level,
 367                         "LUN reset failure, status: %d\n", task_status);
 368                 rc = FAILED;
 369         }
 370
 371 out:
 372         return rc;
 373 }
 374
 375 /*
 376  * Scsi_Host template entry, resets the target and abort all commands.
 377  */
 378 static int
 379 bfad_im_reset_target_handler(struct scsi_cmnd *cmnd)
 380 {
 381         struct Scsi_Host *shost = cmnd->device->host;
 382         struct scsi_target *starget = scsi_target(cmnd->device);
 383         struct bfad_im_port_s *im_port =
 384                                 (struct bfad_im_port_s *) shost->hostdata[0];
 385         struct bfad_s         *bfad = im_port->bfad;
 386         struct bfad_itnim_s   *itnim;
 387         unsigned long   flags;
 388         u32        rc, rtn = FAILED;
 389         DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wq);
 390         enum bfi_tskim_status task_status;
 391
 392         spin_lock_irqsave(&bfad->bfad_lock, flags);
 393         itnim = bfad_get_itnim(im_port, starget->id);
 394         if (itnim) {
 395                 cmnd->SCp.ptr = (char *)&wq;
 396                 rc = bfad_im_target_reset_send(bfad, cmnd, itnim);
 397                 if (rc == BFA_STATUS_OK) {
 398                         /* wait target reset to complete */
 399                         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
 400                         wait_event(wq, test_bit(IO_DONE_BIT,
 401                                         (unsigned long *)&cmnd->SCp.Status));
 402                         spin_lock_irqsave(&bfad->bfad_lock, flags);
 403
 404                         task_status = cmnd->SCp.Status >> 1;
 405                         if (task_status != BFI_TSKIM_STS_OK)
 406                                 BFA_LOG(KERN_ERR, bfad, bfa_log_level,
 407                                         "target reset failure,"
 408                                         " status: %d\n", task_status);
 409                         else
 410                                 rtn = SUCCESS;
 411                 }
 412         }
 413         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
 414
 415         return rtn;
 416 }
 417
 418 /*
 419  * Scsi_Host template entry slave_destroy.
 420  */
 421 static void
 422 bfad_im_slave_destroy(struct scsi_device *sdev)
 423 {
 424         sdev->hostdata = NULL;
 425         return;
 426 }
 427
 428 /*
 429  *  BFA FCS itnim callbacks
 430  */
 431
 432 /*
 433  * BFA FCS itnim alloc callback, after successful PRLI
 434  * Context: Interrupt
 435  */
 436 int
 437 bfa_fcb_itnim_alloc(struct bfad_s *bfad, struct bfa_fcs_itnim_s **itnim,
 438                     struct bfad_itnim_s **itnim_drv)
 439 {
 440         *itnim_drv = kzalloc(sizeof(struct bfad_itnim_s), GFP_ATOMIC);
 441         if (*itnim_drv == NULL)
 442                 return -ENOMEM;
 443
 444         (*itnim_drv)->im = bfad->im;
 445         *itnim = &(*itnim_drv)->fcs_itnim;
 446         (*itnim_drv)->state = ITNIM_STATE_NONE;
 447
 448         /*
 449          * Initiaze the itnim_work
 450          */
 451         INIT_WORK(&(*itnim_drv)->itnim_work, bfad_im_itnim_work_handler);
 452         bfad->bfad_flags |= BFAD_RPORT_ONLINE;
 453         return 0;
 454 }
 455
 456 /*
 457  * BFA FCS itnim free callback.
 458  * Context: Interrupt. bfad_lock is held
 459  */
 460 void
 461 bfa_fcb_itnim_free(struct bfad_s *bfad, struct bfad_itnim_s *itnim_drv)
 462 {
 463         struct bfad_port_s    *port;
 464         wwn_t wwpn;
 465         u32 fcid;
 466         char wwpn_str[32], fcid_str[16];
 467         struct bfad_im_s        *im = itnim_drv->im;
 468
 469         /* online to free state transtion should not happen */
 470         WARN_ON(itnim_drv->state == ITNIM_STATE_ONLINE);
 471
 472         itnim_drv->queue_work = 1;
 473         /* offline request is not yet done, use the same request to free */
 474         if (itnim_drv->state == ITNIM_STATE_OFFLINE_PENDING)
 475                 itnim_drv->queue_work = 0;
 476
 477         itnim_drv->state = ITNIM_STATE_FREE;
 478         port = bfa_fcs_itnim_get_drvport(&itnim_drv->fcs_itnim);
 479         itnim_drv->im_port = port->im_port;
 480         wwpn = bfa_fcs_itnim_get_pwwn(&itnim_drv->fcs_itnim);
 481         fcid = bfa_fcs_itnim_get_fcid(&itnim_drv->fcs_itnim);
 482         wwn2str(wwpn_str, wwpn);
 483         fcid2str(fcid_str, fcid);
 484         BFA_LOG(KERN_INFO, bfad, bfa_log_level,
 485                 "ITNIM FREE scsi%d: FCID: %s WWPN: %s\n",
 486                 port->im_port->shost->host_no,
 487                 fcid_str, wwpn_str);
 488
 489         /* ITNIM processing */
 490         if (itnim_drv->queue_work)
 491                 queue_work(im->drv_workq, &itnim_drv->itnim_work);
 492 }
 493
 494 /*
 495  * BFA FCS itnim online callback.
 496  * Context: Interrupt. bfad_lock is held
 497  */
 498 void
 499 bfa_fcb_itnim_online(struct bfad_itnim_s *itnim_drv)
 500 {
 501         struct bfad_port_s    *port;
 502         struct bfad_im_s        *im = itnim_drv->im;
 503
 504         itnim_drv->bfa_itnim = bfa_fcs_itnim_get_halitn(&itnim_drv->fcs_itnim);
 505         port = bfa_fcs_itnim_get_drvport(&itnim_drv->fcs_itnim);
 506         itnim_drv->state = ITNIM_STATE_ONLINE;
 507         itnim_drv->queue_work = 1;
 508         itnim_drv->im_port = port->im_port;
 509
 510         /* ITNIM processing */
 511         if (itnim_drv->queue_work)
 512                 queue_work(im->drv_workq, &itnim_drv->itnim_work);
 513 }
 514
 515 /*
 516  * BFA FCS itnim offline callback.
 517  * Context: Interrupt. bfad_lock is held
 518  */
 519 void
 520 bfa_fcb_itnim_offline(struct bfad_itnim_s *itnim_drv)
 521 {
 522         struct bfad_port_s    *port;
 523         struct bfad_s *bfad;
 524         struct bfad_im_s        *im = itnim_drv->im;
 525
 526         port = bfa_fcs_itnim_get_drvport(&itnim_drv->fcs_itnim);
 527         bfad = port->bfad;
 528         if ((bfad->pport.flags & BFAD_PORT_DELETE) ||
 529                  (port->flags & BFAD_PORT_DELETE)) {
 530                 itnim_drv->state = ITNIM_STATE_OFFLINE;
 531                 return;
 532         }
 533         itnim_drv->im_port = port->im_port;
 534         itnim_drv->state = ITNIM_STATE_OFFLINE_PENDING;
 535         itnim_drv->queue_work = 1;
 536
 537         /* ITNIM processing */
 538         if (itnim_drv->queue_work)
 539                 queue_work(im->drv_workq, &itnim_drv->itnim_work);
 540 }
 541
 542 /*
 543  * Allocate a Scsi_Host for a port.
 544  */
 545 int
 546 bfad_im_scsi_host_alloc(struct bfad_s *bfad, struct bfad_im_port_s *im_port,
 547                         struct device *dev)
 548 {
 549         int error = 1;
 550
 551         mutex_lock(&bfad_mutex);
 552         error = idr_alloc(&bfad_im_port_index, im_port, 0, 0, GFP_KERNEL);
 553         if (error < 0) {
 554                 mutex_unlock(&bfad_mutex);
 555                 printk(KERN_WARNING "idr_alloc failure\n");
 556                 goto out;
 557         }
 558         im_port->idr_id = error;
 559         mutex_unlock(&bfad_mutex);
 560
 561         im_port->shost = bfad_scsi_host_alloc(im_port, bfad);
 562         if (!im_port->shost) {
 563                 error = 1;
 564                 goto out_free_idr;
 565         }
 566
 567         im_port->shost->hostdata[0] = (unsigned long)im_port;
 568         im_port->shost->unique_id = im_port->idr_id;
 569         im_port->shost->this_id = -1;
 570         im_port->shost->max_id = MAX_FCP_TARGET;
 571         im_port->shost->max_lun = MAX_FCP_LUN;
 572         im_port->shost->max_cmd_len = 16;
 573         im_port->shost->can_queue = bfad->cfg_data.ioc_queue_depth;
 574         if (im_port->port->pvb_type == BFAD_PORT_PHYS_BASE)
 575                 im_port->shost->transportt = bfad_im_scsi_transport_template;
 576         else
 577                 im_port->shost->transportt =
 578                                 bfad_im_scsi_vport_transport_template;
 579
 580         error = scsi_add_host_with_dma(im_port->shost, dev, &bfad->pcidev->dev);
 581         if (error) {
 582                 printk(KERN_WARNING "scsi_add_host failure %d\n", error);
 583                 goto out_fc_rel;
 584         }
 585
 586         return 0;
 587
 588 out_fc_rel:
 589         scsi_host_put(im_port->shost);
 590         im_port->shost = NULL;
 591 out_free_idr:
 592         mutex_lock(&bfad_mutex);
 593         idr_remove(&bfad_im_port_index, im_port->idr_id);
 594         mutex_unlock(&bfad_mutex);
 595 out:
 596         return error;
 597 }
 598
 599 void
 600 bfad_im_scsi_host_free(struct bfad_s *bfad, struct bfad_im_port_s *im_port)
 601 {
 602         bfa_trc(bfad, bfad->inst_no);
 603         BFA_LOG(KERN_INFO, bfad, bfa_log_level, "Free scsi%d\n",
 604                         im_port->shost->host_no);
 605
 606         fc_remove_host(im_port->shost);
 607
 608         scsi_remove_host(im_port->shost);
 609         scsi_host_put(im_port->shost);
 610
 611         mutex_lock(&bfad_mutex);
 612         idr_remove(&bfad_im_port_index, im_port->idr_id);
 613         mutex_unlock(&bfad_mutex);
 614 }
 615
 616 static void
 617 bfad_im_port_delete_handler(struct work_struct *work)
 618 {
 619         struct bfad_im_port_s *im_port =
 620                 container_of(work, struct bfad_im_port_s, port_delete_work);
 621
 622         if (im_port->port->pvb_type != BFAD_PORT_PHYS_BASE) {
 623                 im_port->flags |= BFAD_PORT_DELETE;
 624                 fc_vport_terminate(im_port->fc_vport);
 625         }
 626 }
 627
 628 bfa_status_t
 629 bfad_im_port_new(struct bfad_s *bfad, struct bfad_port_s *port)
 630 {
 631         int             rc = BFA_STATUS_OK;
 632         struct bfad_im_port_s *im_port;
 633
 634         im_port = kzalloc(sizeof(struct bfad_im_port_s), GFP_ATOMIC);
 635         if (im_port == NULL) {
 636                 rc = BFA_STATUS_ENOMEM;
 637                 goto ext;
 638         }
 639         port->im_port = im_port;
 640         im_port->port = port;
 641         im_port->bfad = bfad;
 642
 643         INIT_WORK(&im_port->port_delete_work, bfad_im_port_delete_handler);
 644         INIT_LIST_HEAD(&im_port->itnim_mapped_list);
 645         INIT_LIST_HEAD(&im_port->binding_list);
 646
 647 ext:
 648         return rc;
 649 }
 650
 651 void
 652 bfad_im_port_delete(struct bfad_s *bfad, struct bfad_port_s *port)
 653 {
 654         struct bfad_im_port_s *im_port = port->im_port;
 655
 656         queue_work(bfad->im->drv_workq,
 657                                 &im_port->port_delete_work);
 658 }
 659
 660 void
 661 bfad_im_port_clean(struct bfad_im_port_s *im_port)
 662 {
 663         struct bfad_fcp_binding *bp, *bp_new;
 664         unsigned long flags;
 665         struct bfad_s *bfad =  im_port->bfad;
 666
 667         spin_lock_irqsave(&bfad->bfad_lock, flags);
 668         list_for_each_entry_safe(bp, bp_new, &im_port->binding_list,
 669                                         list_entry) {
 670                 list_del(&bp->list_entry);
 671                 kfree(bp);
 672         }
 673
 674         /* the itnim_mapped_list must be empty at this time */
 675         WARN_ON(!list_empty(&im_port->itnim_mapped_list));
 676
 677         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
 678 }
 679
 680 static void bfad_aen_im_notify_handler(struct work_struct *work)
 681 {
 682         struct bfad_im_s *im =
 683                 container_of(work, struct bfad_im_s, aen_im_notify_work);
 684         struct bfa_aen_entry_s *aen_entry;
 685         struct bfad_s *bfad = im->bfad;
 686         struct Scsi_Host *shost = bfad->pport.im_port->shost;
 687         void *event_data;
 688         unsigned long flags;
 689
 690         while (!list_empty(&bfad->active_aen_q)) {
 691                 spin_lock_irqsave(&bfad->bfad_aen_spinlock, flags);
 692                 bfa_q_deq(&bfad->active_aen_q, &aen_entry);
 693                 spin_unlock_irqrestore(&bfad->bfad_aen_spinlock, flags);
 694                 event_data = (char *)aen_entry + sizeof(struct list_head);
 695                 fc_host_post_vendor_event(shost, fc_get_event_number(),
 696                                 sizeof(struct bfa_aen_entry_s) -
 697                                 sizeof(struct list_head),
 698                                 (char *)event_data, BFAD_NL_VENDOR_ID);
 699                 spin_lock_irqsave(&bfad->bfad_aen_spinlock, flags);
 700                 list_add_tail(&aen_entry->qe, &bfad->free_aen_q);
 701                 spin_unlock_irqrestore(&bfad->bfad_aen_spinlock, flags);
 702         }
 703 }
 704
 705 bfa_status_t
 706 bfad_im_probe(struct bfad_s *bfad)
 707 {
 708         struct bfad_im_s      *im;
 709
 710         im = kzalloc(sizeof(struct bfad_im_s), GFP_KERNEL);
 711         if (im == NULL)
 712                 return BFA_STATUS_ENOMEM;
 713
 714         bfad->im = im;
 715         im->bfad = bfad;
 716
 717         if (bfad_thread_workq(bfad) != BFA_STATUS_OK) {
 718                 kfree(im);
 719                 return BFA_STATUS_FAILED;
 720         }
 721
 722         INIT_WORK(&im->aen_im_notify_work, bfad_aen_im_notify_handler);
 723         return BFA_STATUS_OK;
 724 }
 725
 726 void
 727 bfad_im_probe_undo(struct bfad_s *bfad)
 728 {
 729         if (bfad->im) {
 730                 bfad_destroy_workq(bfad->im);
 731                 kfree(bfad->im);
 732                 bfad->im = NULL;
 733         }
 734 }
 735
 736 struct Scsi_Host *
 737 bfad_scsi_host_alloc(struct bfad_im_port_s *im_port, struct bfad_s *bfad)
 738 {
 739         struct scsi_host_template *sht;
 740
 741         if (im_port->port->pvb_type == BFAD_PORT_PHYS_BASE)
 742                 sht = &bfad_im_scsi_host_template;
 743         else
 744                 sht = &bfad_im_vport_template;
 745
 746         if (max_xfer_size != BFAD_MAX_SECTORS >> 1)
 747                 sht->max_sectors = max_xfer_size << 1;
 748
 749         sht->sg_tablesize = bfad->cfg_data.io_max_sge;
 750
 751         return scsi_host_alloc(sht, sizeof(unsigned long));
 752 }
 753
 754 void
 755 bfad_scsi_host_free(struct bfad_s *bfad, struct bfad_im_port_s *im_port)
 756 {
 757         if (!(im_port->flags & BFAD_PORT_DELETE))
 758                 flush_workqueue(bfad->im->drv_workq);
 759         bfad_im_scsi_host_free(im_port->bfad, im_port);
 760         bfad_im_port_clean(im_port);
 761         kfree(im_port);
 762 }
 763
 764 void
 765 bfad_destroy_workq(struct bfad_im_s *im)
 766 {
 767         if (im && im->drv_workq) {
 768                 flush_workqueue(im->drv_workq);
 769                 destroy_workqueue(im->drv_workq);
 770                 im->drv_workq = NULL;
 771         }
 772 }
 773
 774 bfa_status_t
 775 bfad_thread_workq(struct bfad_s *bfad)
 776 {
 777         struct bfad_im_s      *im = bfad->im;
 778
 779         bfa_trc(bfad, 0);
 780         snprintf(im->drv_workq_name, KOBJ_NAME_LEN, "bfad_wq_%d",
 781                  bfad->inst_no);
 782         im->drv_workq = create_singlethread_workqueue(im->drv_workq_name);
 783         if (!im->drv_workq)
 784                 return BFA_STATUS_FAILED;
 785
 786         return BFA_STATUS_OK;
 787 }
 788
 789 /*
 790  * Scsi_Host template entry.
 791  *
 792  * Description:
 793  * OS entry point to adjust the queue_depths on a per-device basis.
 794  * Called once per device during the bus scan.
 795  * Return non-zero if fails.
 796  */
 797 static int
 798 bfad_im_slave_configure(struct scsi_device *sdev)
 799 {
 800         scsi_change_queue_depth(sdev, bfa_lun_queue_depth);
 801         return 0;
 802 }
 803
 804 struct scsi_host_template bfad_im_scsi_host_template = {
 805         .module = THIS_MODULE,
 806         .name = BFAD_DRIVER_NAME,
 807         .info = bfad_im_info,
 808         .queuecommand = bfad_im_queuecommand,
 809         .eh_timed_out = fc_eh_timed_out,
 810         .eh_abort_handler = bfad_im_abort_handler,
 811         .eh_device_reset_handler = bfad_im_reset_lun_handler,
 812         .eh_target_reset_handler = bfad_im_reset_target_handler,
 813
 814         .slave_alloc = bfad_im_slave_alloc,
 815         .slave_configure = bfad_im_slave_configure,
 816         .slave_destroy = bfad_im_slave_destroy,
 817
 818         .this_id = -1,
 819         .sg_tablesize = BFAD_IO_MAX_SGE,
 820         .cmd_per_lun = 3,
 821         .use_clustering = ENABLE_CLUSTERING,
 822         .shost_attrs = bfad_im_host_attrs,
 823         .max_sectors = BFAD_MAX_SECTORS,
 824         .vendor_id = BFA_PCI_VENDOR_ID_BROCADE,
 825 };
 826
 827 struct scsi_host_template bfad_im_vport_template = {
 828         .module = THIS_MODULE,
 829         .name = BFAD_DRIVER_NAME,
 830         .info = bfad_im_info,
 831         .queuecommand = bfad_im_queuecommand,
 832         .eh_timed_out = fc_eh_timed_out,
 833         .eh_abort_handler = bfad_im_abort_handler,
 834         .eh_device_reset_handler = bfad_im_reset_lun_handler,
 835         .eh_target_reset_handler = bfad_im_reset_target_handler,
 836
 837         .slave_alloc = bfad_im_slave_alloc,
 838         .slave_configure = bfad_im_slave_configure,
 839         .slave_destroy = bfad_im_slave_destroy,
 840
 841         .this_id = -1,
 842         .sg_tablesize = BFAD_IO_MAX_SGE,
 843         .cmd_per_lun = 3,
 844         .use_clustering = ENABLE_CLUSTERING,
 845         .shost_attrs = bfad_im_vport_attrs,
 846         .max_sectors = BFAD_MAX_SECTORS,
 847 };
 848
 849 bfa_status_t
 850 bfad_im_module_init(void)
 851 {
 852         bfad_im_scsi_transport_template =
 853                 fc_attach_transport(&bfad_im_fc_function_template);
 854         if (!bfad_im_scsi_transport_template)
 855                 return BFA_STATUS_ENOMEM;
 856
 857         bfad_im_scsi_vport_transport_template =
 858                 fc_attach_transport(&bfad_im_vport_fc_function_template);
 859         if (!bfad_im_scsi_vport_transport_template) {
 860                 fc_release_transport(bfad_im_scsi_transport_template);
 861                 return BFA_STATUS_ENOMEM;
 862         }
 863
 864         return BFA_STATUS_OK;
 865 }
 866
 867 void
 868 bfad_im_module_exit(void)
 869 {
 870         if (bfad_im_scsi_transport_template)
 871                 fc_release_transport(bfad_im_scsi_transport_template);
 872
 873         if (bfad_im_scsi_vport_transport_template)
 874                 fc_release_transport(bfad_im_scsi_vport_transport_template);
 875
 876         idr_destroy(&bfad_im_port_index);
 877 }
 878
 879 void
 880 bfad_ramp_up_qdepth(struct bfad_itnim_s *itnim, struct scsi_device *sdev)
 881 {
 882         struct scsi_device *tmp_sdev;
 883
 884         if (((jiffies - itnim->last_ramp_up_time) >
 885                 BFA_QUEUE_FULL_RAMP_UP_TIME * HZ) &&
 886                 ((jiffies - itnim->last_queue_full_time) >
 887                 BFA_QUEUE_FULL_RAMP_UP_TIME * HZ)) {
 888                 shost_for_each_device(tmp_sdev, sdev->host) {
 889                         if (bfa_lun_queue_depth > tmp_sdev->queue_depth) {
 890                                 if (tmp_sdev->id != sdev->id)
 891                                         continue;
 892                                 scsi_change_queue_depth(tmp_sdev,
 893                                         tmp_sdev->queue_depth + 1);
 894
 895                                 itnim->last_ramp_up_time = jiffies;
 896                         }
 897                 }
 898         }
 899 }
 900
 901 void
 902 bfad_handle_qfull(struct bfad_itnim_s *itnim, struct scsi_device *sdev)
 903 {
 904         struct scsi_device *tmp_sdev;
 905
 906         itnim->last_queue_full_time = jiffies;
 907
 908         shost_for_each_device(tmp_sdev, sdev->host) {
 909                 if (tmp_sdev->id != sdev->id)
 910                         continue;
 911                 scsi_track_queue_full(tmp_sdev, tmp_sdev->queue_depth - 1);
 912         }
 913 }
 914
 915 struct bfad_itnim_s *
 916 bfad_get_itnim(struct bfad_im_port_s *im_port, int id)
 917 {
 918         struct bfad_itnim_s   *itnim = NULL;
 919
 920         /* Search the mapped list for this target ID */
 921         list_for_each_entry(itnim, &im_port->itnim_mapped_list, list_entry) {
 922                 if (id == itnim->scsi_tgt_id)
 923                         return itnim;
 924         }
 925
 926         return NULL;
 927 }
 928
 929 /*
 930  * Function is invoked from the SCSI Host Template slave_alloc() entry point.
 931  * Has the logic to query the LUN Mask database to check if this LUN needs to
 932  * be made visible to the SCSI mid-layer or not.
 933  *
 934  * Returns BFA_STATUS_OK if this LUN needs to be added to the OS stack.
 935  * Returns -ENXIO to notify SCSI mid-layer to not add this LUN to the OS stack.
 936  */
 937 static int
 938 bfad_im_check_if_make_lun_visible(struct scsi_device *sdev,
 939                                   struct fc_rport *rport)
 940 {
 941         struct bfad_itnim_data_s *itnim_data =
 942                                 (struct bfad_itnim_data_s *) rport->dd_data;
 943         struct bfa_s *bfa = itnim_data->itnim->bfa_itnim->bfa;
 944         struct bfa_rport_s *bfa_rport = itnim_data->itnim->bfa_itnim->rport;
 945         struct bfa_lun_mask_s *lun_list = bfa_get_lun_mask_list(bfa);
 946         int i = 0, ret = -ENXIO;
 947
 948         for (i = 0; i < MAX_LUN_MASK_CFG; i++) {
 949                 if (lun_list[i].state == BFA_IOIM_LUN_MASK_ACTIVE &&
 950                     scsilun_to_int(&lun_list[i].lun) == sdev->lun &&
 951                     lun_list[i].rp_tag == bfa_rport->rport_tag &&
 952                     lun_list[i].lp_tag == (u8)bfa_rport->rport_info.lp_tag) {
 953                         ret = BFA_STATUS_OK;
 954                         break;
 955                 }
 956         }
 957         return ret;
 958 }
 959
 960 /*
 961  * Scsi_Host template entry slave_alloc
 962  */
 963 static int
 964 bfad_im_slave_alloc(struct scsi_device *sdev)
 965 {
 966         struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
 967         struct bfad_itnim_data_s *itnim_data;
 968         struct bfa_s *bfa;
 969
 970         if (!rport || fc_remote_port_chkready(rport))
 971                 return -ENXIO;
 972
 973         itnim_data = (struct bfad_itnim_data_s *) rport->dd_data;
 974         bfa = itnim_data->itnim->bfa_itnim->bfa;
 975
 976         if (bfa_get_lun_mask_status(bfa) == BFA_LUNMASK_ENABLED) {
 977                 /*
 978                  * We should not mask LUN 0 - since this will translate
 979                  * to no LUN / TARGET for SCSI ml resulting no scan.
 980                  */
 981                 if (sdev->lun == 0) {
 982                         sdev->sdev_bflags |= BLIST_NOREPORTLUN |
 983                                              BLIST_SPARSELUN;
 984                         goto done;
 985                 }
 986
 987                 /*
 988                  * Query LUN Mask configuration - to expose this LUN
 989                  * to the SCSI mid-layer or to mask it.
 990                  */
 991                 if (bfad_im_check_if_make_lun_visible(sdev, rport) !=
 992                                                         BFA_STATUS_OK)
 993                         return -ENXIO;
 994         }
 995 done:
 996         sdev->hostdata = rport->dd_data;
 997
 998         return 0;
 999 }
1000
1001 u32
1002 bfad_im_supported_speeds(struct bfa_s *bfa)
1003 {
1004         struct bfa_ioc_attr_s *ioc_attr;
1005         u32 supported_speed = 0;
1006
1007         ioc_attr = kzalloc(sizeof(struct bfa_ioc_attr_s), GFP_KERNEL);
1008         if (!ioc_attr)
1009                 return 0;
1010
1011         bfa_ioc_get_attr(&bfa->ioc, ioc_attr);
1012         if (ioc_attr->adapter_attr.max_speed == BFA_PORT_SPEED_16GBPS)
1013                 supported_speed |=  FC_PORTSPEED_16GBIT | FC_PORTSPEED_8GBIT |
1014                                 FC_PORTSPEED_4GBIT | FC_PORTSPEED_2GBIT;
1015         else if (ioc_attr->adapter_attr.max_speed == BFA_PORT_SPEED_8GBPS) {
1016                 if (ioc_attr->adapter_attr.is_mezz) {
1017                         supported_speed |= FC_PORTSPEED_8GBIT |
1018                                 FC_PORTSPEED_4GBIT |
1019                                 FC_PORTSPEED_2GBIT | FC_PORTSPEED_1GBIT;
1020                 } else {
1021                         supported_speed |= FC_PORTSPEED_8GBIT |
1022                                 FC_PORTSPEED_4GBIT |
1023                                 FC_PORTSPEED_2GBIT;
1024                 }
1025         } else if (ioc_attr->adapter_attr.max_speed == BFA_PORT_SPEED_4GBPS) {
1026                 supported_speed |=  FC_PORTSPEED_4GBIT | FC_PORTSPEED_2GBIT |
1027                                 FC_PORTSPEED_1GBIT;
1028         } else if (ioc_attr->adapter_attr.max_speed == BFA_PORT_SPEED_10GBPS) {
1029                 supported_speed |= FC_PORTSPEED_10GBIT;
1030         }
1031         kfree(ioc_attr);
1032         return supported_speed;
1033 }
1034
1035 void
1036 bfad_fc_host_init(struct bfad_im_port_s *im_port)
1037 {
1038         struct Scsi_Host *host = im_port->shost;
1039         struct bfad_s         *bfad = im_port->bfad;
1040         struct bfad_port_s    *port = im_port->port;
1041         char symname[BFA_SYMNAME_MAXLEN];
1042         struct bfa_fcport_s *fcport = BFA_FCPORT_MOD(&bfad->bfa);
1043
1044         fc_host_node_name(host) =
1045                 cpu_to_be64((bfa_fcs_lport_get_nwwn(port->fcs_port)));
1046         fc_host_port_name(host) =
1047                 cpu_to_be64((bfa_fcs_lport_get_pwwn(port->fcs_port)));
1048         fc_host_max_npiv_vports(host) = bfa_lps_get_max_vport(&bfad->bfa);
1049
1050         fc_host_supported_classes(host) = FC_COS_CLASS3;
1051
1052         memset(fc_host_supported_fc4s(host), 0,
1053                sizeof(fc_host_supported_fc4s(host)));
1054         if (supported_fc4s & BFA_LPORT_ROLE_FCP_IM)
1055                 /* For FCP type 0x08 */
1056                 fc_host_supported_fc4s(host)[2] = 1;
1057         /* For fibre channel services type 0x20 */
1058         fc_host_supported_fc4s(host)[7] = 1;
1059
1060         strlcpy(symname, bfad->bfa_fcs.fabric.bport.port_cfg.sym_name.symname,
1061                 BFA_SYMNAME_MAXLEN);
1062         sprintf(fc_host_symbolic_name(host), "%s", symname);
1063
1064         fc_host_supported_speeds(host) = bfad_im_supported_speeds(&bfad->bfa);
1065         fc_host_maxframe_size(host) = fcport->cfg.maxfrsize;
1066 }
1067
1068 static void
1069 bfad_im_fc_rport_add(struct bfad_im_port_s *im_port, struct bfad_itnim_s *itnim)
1070 {
1071         struct fc_rport_identifiers rport_ids;
1072         struct fc_rport *fc_rport;
1073         struct bfad_itnim_data_s *itnim_data;
1074
1075         rport_ids.node_name =
1076                 cpu_to_be64(bfa_fcs_itnim_get_nwwn(&itnim->fcs_itnim));
1077         rport_ids.port_name =
1078                 cpu_to_be64(bfa_fcs_itnim_get_pwwn(&itnim->fcs_itnim));
1079         rport_ids.port_id =
1080                 bfa_hton3b(bfa_fcs_itnim_get_fcid(&itnim->fcs_itnim));
1081         rport_ids.roles = FC_RPORT_ROLE_UNKNOWN;
1082
1083         itnim->fc_rport = fc_rport =
1084                 fc_remote_port_add(im_port->shost, 0, &rport_ids);
1085
1086         if (!fc_rport)
1087                 return;
1088
1089         fc_rport->maxframe_size =
1090                 bfa_fcs_itnim_get_maxfrsize(&itnim->fcs_itnim);
1091         fc_rport->supported_classes = bfa_fcs_itnim_get_cos(&itnim->fcs_itnim);
1092
1093         itnim_data = fc_rport->dd_data;
1094         itnim_data->itnim = itnim;
1095
1096         rport_ids.roles |= FC_RPORT_ROLE_FCP_TARGET;
1097
1098         if (rport_ids.roles != FC_RPORT_ROLE_UNKNOWN)
1099                 fc_remote_port_rolechg(fc_rport, rport_ids.roles);
1100
1101         if ((fc_rport->scsi_target_id != -1)
1102             && (fc_rport->scsi_target_id < MAX_FCP_TARGET))
1103                 itnim->scsi_tgt_id = fc_rport->scsi_target_id;
1104
1105         itnim->channel = fc_rport->channel;
1106
1107         return;
1108 }
1109
1110 /*
1111  * Work queue handler using FC transport service
1112 * Context: kernel
1113  */
1114 static void
1115 bfad_im_itnim_work_handler(struct work_struct *work)
1116 {
1117         struct bfad_itnim_s   *itnim = container_of(work, struct bfad_itnim_s,
1118                                                         itnim_work);
1119         struct bfad_im_s      *im = itnim->im;
1120         struct bfad_s         *bfad = im->bfad;
1121         struct bfad_im_port_s *im_port;
1122         unsigned long   flags;
1123         struct fc_rport *fc_rport;
1124         wwn_t wwpn;
1125         u32 fcid;
1126         char wwpn_str[32], fcid_str[16];
1127
1128         spin_lock_irqsave(&bfad->bfad_lock, flags);
1129         im_port = itnim->im_port;
1130         bfa_trc(bfad, itnim->state);
1131         switch (itnim->state) {
1132         case ITNIM_STATE_ONLINE:
1133                 if (!itnim->fc_rport) {
1134                         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
1135                         bfad_im_fc_rport_add(im_port, itnim);
1136                         spin_lock_irqsave(&bfad->bfad_lock, flags);
1137                         wwpn = bfa_fcs_itnim_get_pwwn(&itnim->fcs_itnim);
1138                         fcid = bfa_fcs_itnim_get_fcid(&itnim->fcs_itnim);
1139                         wwn2str(wwpn_str, wwpn);
1140                         fcid2str(fcid_str, fcid);
1141                         list_add_tail(&itnim->list_entry,
1142                                 &im_port->itnim_mapped_list);
1143                         BFA_LOG(KERN_INFO, bfad, bfa_log_level,
1144                                 "ITNIM ONLINE Target: %d:0:%d "
1145                                 "FCID: %s WWPN: %s\n",
1146                                 im_port->shost->host_no,
1147                                 itnim->scsi_tgt_id,
1148                                 fcid_str, wwpn_str);
1149                 } else {
1150                         printk(KERN_WARNING
1151                                 "%s: itnim %llx is already in online state\n",
1152                                 __func__,
1153                                 bfa_fcs_itnim_get_pwwn(&itnim->fcs_itnim));
1154                 }
1155
1156                 break;
1157         case ITNIM_STATE_OFFLINE_PENDING:
1158                 itnim->state = ITNIM_STATE_OFFLINE;
1159                 if (itnim->fc_rport) {
1160                         fc_rport = itnim->fc_rport;
1161                         ((struct bfad_itnim_data_s *)
1162                                 fc_rport->dd_data)->itnim = NULL;
1163                         itnim->fc_rport = NULL;
1164                         if (!(im_port->port->flags & BFAD_PORT_DELETE)) {
1165                                 spin_unlock_irqrestore(&bfad->bfad_lock, flags);
1166                                 fc_rport->dev_loss_tmo =
1167                                         bfa_fcpim_path_tov_get(&bfad->bfa) + 1;
1168                                 fc_remote_port_delete(fc_rport);
1169                                 spin_lock_irqsave(&bfad->bfad_lock, flags);
1170                         }
1171                         wwpn = bfa_fcs_itnim_get_pwwn(&itnim->fcs_itnim);
1172                         fcid = bfa_fcs_itnim_get_fcid(&itnim->fcs_itnim);
1173                         wwn2str(wwpn_str, wwpn);
1174                         fcid2str(fcid_str, fcid);
1175                         list_del(&itnim->list_entry);
1176                         BFA_LOG(KERN_INFO, bfad, bfa_log_level,
1177                                 "ITNIM OFFLINE Target: %d:0:%d "
1178                                 "FCID: %s WWPN: %s\n",
1179                                 im_port->shost->host_no,
1180                                 itnim->scsi_tgt_id,
1181                                 fcid_str, wwpn_str);
1182                 }
1183                 break;
1184         case ITNIM_STATE_FREE:
1185                 if (itnim->fc_rport) {
1186                         fc_rport = itnim->fc_rport;
1187                         ((struct bfad_itnim_data_s *)
1188                                 fc_rport->dd_data)->itnim = NULL;
1189                         itnim->fc_rport = NULL;
1190                         if (!(im_port->port->flags & BFAD_PORT_DELETE)) {
1191                                 spin_unlock_irqrestore(&bfad->bfad_lock, flags);
1192                                 fc_rport->dev_loss_tmo =
1193                                         bfa_fcpim_path_tov_get(&bfad->bfa) + 1;
1194                                 fc_remote_port_delete(fc_rport);
1195                                 spin_lock_irqsave(&bfad->bfad_lock, flags);
1196                         }
1197                         list_del(&itnim->list_entry);
1198                 }
1199
1200                 kfree(itnim);
1201                 break;
1202         default:
1203                 WARN_ON(1);
1204                 break;
1205         }
1206
1207         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
1208 }
1209
1210 /*
1211  * Scsi_Host template entry, queue a SCSI command to the BFAD.
1212  */
1213 static int
1214 bfad_im_queuecommand_lck(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *))
1215 {
1216         struct bfad_im_port_s *im_port =
1217                 (struct bfad_im_port_s *) cmnd->device->host->hostdata[0];
1218         struct bfad_s         *bfad = im_port->bfad;
1219         struct bfad_itnim_data_s *itnim_data = cmnd->device->hostdata;
1220         struct bfad_itnim_s   *itnim;
1221         struct bfa_ioim_s *hal_io;
1222         unsigned long   flags;
1223         int             rc;
1224         int       sg_cnt = 0;
1225         struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
1226
1227         rc = fc_remote_port_chkready(rport);
1228         if (rc) {
1229                 cmnd->result = rc;
1230                 done(cmnd);
1231                 return 0;
1232         }
1233
1234         if (bfad->bfad_flags & BFAD_EEH_BUSY) {
1235                 if (bfad->bfad_flags & BFAD_EEH_PCI_CHANNEL_IO_PERM_FAILURE)
1236                         cmnd->result = DID_NO_CONNECT << 16;
1237                 else
1238                         cmnd->result = DID_REQUEUE << 16;
1239                 done(cmnd);
1240                 return 0;
1241         }
1242
1243         sg_cnt = scsi_dma_map(cmnd);
1244         if (sg_cnt < 0)
1245                 return SCSI_MLQUEUE_HOST_BUSY;
1246
1247         cmnd->scsi_done = done;
1248
1249         spin_lock_irqsave(&bfad->bfad_lock, flags);
1250         if (!(bfad->bfad_flags & BFAD_HAL_START_DONE)) {
1251                 printk(KERN_WARNING
1252                         "bfad%d, queuecommand %p %x failed, BFA stopped\n",
1253                        bfad->inst_no, cmnd, cmnd->cmnd[0]);
1254                 cmnd->result = ScsiResult(DID_NO_CONNECT, 0);
1255                 goto out_fail_cmd;
1256         }
1257
1258
1259         itnim = itnim_data->itnim;
1260         if (!itnim) {
1261                 cmnd->result = ScsiResult(DID_IMM_RETRY, 0);
1262                 goto out_fail_cmd;
1263         }
1264
1265         hal_io = bfa_ioim_alloc(&bfad->bfa, (struct bfad_ioim_s *) cmnd,
1266                                     itnim->bfa_itnim, sg_cnt);
1267         if (!hal_io) {
1268                 printk(KERN_WARNING "hal_io failure\n");
1269                 spin_unlock_irqrestore(&bfad->bfad_lock, flags);
1270                 scsi_dma_unmap(cmnd);
1271                 return SCSI_MLQUEUE_HOST_BUSY;
1272         }
1273
1274         cmnd->host_scribble = (char *)hal_io;
1275         bfa_ioim_start(hal_io);
1276         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
1277
1278         return 0;
1279
1280 out_fail_cmd:
1281         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
1282         scsi_dma_unmap(cmnd);
1283         if (done)
1284                 done(cmnd);
1285
1286         return 0;
1287 }
1288
1289 static DEF_SCSI_QCMD(bfad_im_queuecommand)
1290
1291 void
1292 bfad_rport_online_wait(struct bfad_s *bfad)
1293 {
1294         int i;
1295         int rport_delay = 10;
1296
1297         for (i = 0; !(bfad->bfad_flags & BFAD_PORT_ONLINE)
1298                 && i < bfa_linkup_delay; i++) {
1299                 set_current_state(TASK_UNINTERRUPTIBLE);
1300                 schedule_timeout(HZ);
1301         }
1302
1303         if (bfad->bfad_flags & BFAD_PORT_ONLINE) {
1304                 rport_delay = rport_delay < bfa_linkup_delay ?
1305                         rport_delay : bfa_linkup_delay;
1306                 for (i = 0; !(bfad->bfad_flags & BFAD_RPORT_ONLINE)
1307                         && i < rport_delay; i++) {
1308                         set_current_state(TASK_UNINTERRUPTIBLE);
1309                         schedule_timeout(HZ);
1310                 }
1311
1312                 if (rport_delay > 0 && (bfad->bfad_flags & BFAD_RPORT_ONLINE)) {
1313                         set_current_state(TASK_UNINTERRUPTIBLE);
1314                         schedule_timeout(rport_delay * HZ);
1315                 }
1316         }
1317 }
1318
1319 int
1320 bfad_get_linkup_delay(struct bfad_s *bfad)
1321 {
1322         u8              nwwns = 0;
1323         wwn_t           wwns[BFA_PREBOOT_BOOTLUN_MAX];
1324         int             linkup_delay;
1325
1326         /*
1327          * Querying for the boot target port wwns
1328          * -- read from boot information in flash.
1329          * If nwwns > 0 => boot over SAN and set linkup_delay = 30
1330          * else => local boot machine set linkup_delay = 0
1331          */
1332
1333         bfa_iocfc_get_bootwwns(&bfad->bfa, &nwwns, wwns);
1334
1335         if (nwwns > 0)
1336                 /* If Boot over SAN set linkup_delay = 30sec */
1337                 linkup_delay = 30;
1338         else
1339                 /* If local boot; no linkup_delay */
1340                 linkup_delay = 0;
1341
1342         return linkup_delay;
1343 }