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