sys/dev/smartpqi/smartpqi_cam.c

   1 /*-
   2  * Copyright (c) 2018 Microsemi Corporation.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  */
  26
  27 /* $FreeBSD$ */
  28 /*
  29  * CAM interface for smartpqi driver
  30  */
  31
  32 #include "smartpqi_includes.h"
  33
  34 /*
  35  * Set cam sim properties of the smartpqi adapter.
  36  */
  37 static void update_sim_properties(struct cam_sim *sim, struct ccb_pathinq *cpi)
  38 {
  39
  40         pqisrc_softstate_t *softs = (struct pqisrc_softstate *)
  41                                         cam_sim_softc(sim);
  42         DBG_FUNC("IN\n");
  43
  44         cpi->version_num = 1;
  45         cpi->hba_inquiry = PI_SDTR_ABLE|PI_TAG_ABLE|PI_WIDE_16;
  46         cpi->target_sprt = 0;
  47         cpi->hba_misc = PIM_NOBUSRESET | PIM_UNMAPPED;
  48         cpi->hba_eng_cnt = 0;
  49         cpi->max_lun = PQI_MAX_MULTILUN;
  50         cpi->max_target = 1088;
  51         cpi->maxio = (softs->pqi_cap.max_sg_elem - 1) * PAGE_SIZE;
  52         cpi->initiator_id = 255;
  53         strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
  54         strncpy(cpi->hba_vid, "Microsemi", HBA_IDLEN);
  55         strncpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN);
  56         cpi->unit_number = cam_sim_unit(sim);
  57         cpi->bus_id = cam_sim_bus(sim);
  58         cpi->base_transfer_speed = 1200000; /* Base bus speed in KB/sec */
  59         cpi->protocol = PROTO_SCSI;
  60         cpi->protocol_version = SCSI_REV_SPC4;
  61         cpi->transport = XPORT_SPI;
  62         cpi->transport_version = 2;
  63         cpi->ccb_h.status = CAM_REQ_CMP;
  64
  65         DBG_FUNC("OUT\n");
  66 }
  67
  68 /*
  69  * Get transport settings of the smartpqi adapter
  70  */
  71 static void get_transport_settings(struct pqisrc_softstate *softs,
  72                 struct ccb_trans_settings *cts)
  73 {
  74         struct ccb_trans_settings_scsi  *scsi = &cts->proto_specific.scsi;
  75         struct ccb_trans_settings_sas   *sas = &cts->xport_specific.sas;
  76         struct ccb_trans_settings_spi   *spi = &cts->xport_specific.spi;
  77
  78         DBG_FUNC("IN\n");
  79
  80         cts->protocol = PROTO_SCSI;
  81         cts->protocol_version = SCSI_REV_SPC4;
  82         cts->transport = XPORT_SPI;
  83         cts->transport_version = 2;
  84         spi->valid = CTS_SPI_VALID_DISC;
  85         spi->flags = CTS_SPI_FLAGS_DISC_ENB;
  86         scsi->valid = CTS_SCSI_VALID_TQ;
  87         scsi->flags = CTS_SCSI_FLAGS_TAG_ENB;
  88         sas->valid = CTS_SAS_VALID_SPEED;
  89         cts->ccb_h.status = CAM_REQ_CMP;
  90
  91         DBG_FUNC("OUT\n");
  92 }
  93
  94 /*
  95  *  Add the target to CAM layer and rescan, when a new device is found
  96  */
  97 void os_add_device(pqisrc_softstate_t *softs, pqi_scsi_dev_t *device) {
  98         union ccb                       *ccb;
  99
 100         DBG_FUNC("IN\n");
 101
 102         if(softs->os_specific.sim_registered) {
 103                 if ((ccb = xpt_alloc_ccb_nowait()) == NULL) {
 104                         DBG_ERR("rescan failed (can't allocate CCB)\n");
 105                         return;
 106                 }
 107
 108                 if (xpt_create_path(&ccb->ccb_h.path, NULL,
 109                         cam_sim_path(softs->os_specific.sim),
 110                         device->target, device->lun) != CAM_REQ_CMP) {
 111                         DBG_ERR("rescan failed (can't create path)\n");
 112                         xpt_free_ccb(ccb);
 113                         return;
 114                 }
 115                 xpt_rescan(ccb);
 116         }
 117
 118         DBG_FUNC("OUT\n");
 119 }
 120
 121 /*
 122  * Remove the device from CAM layer when deleted or hot removed
 123  */
 124 void os_remove_device(pqisrc_softstate_t *softs,
 125         pqi_scsi_dev_t *device) {
 126         struct cam_path *tmppath;
 127
 128         DBG_FUNC("IN\n");
 129
 130         if(softs->os_specific.sim_registered) {
 131                 if (xpt_create_path(&tmppath, NULL,
 132                         cam_sim_path(softs->os_specific.sim),
 133                         device->target, device->lun) != CAM_REQ_CMP) {
 134                         DBG_ERR("unable to create path for async event");
 135                         return;
 136                 }
 137                 xpt_async(AC_LOST_DEVICE, tmppath, NULL);
 138                 xpt_free_path(tmppath);
 139                 pqisrc_free_device(softs, device);
 140         }
 141
 142         DBG_FUNC("OUT\n");
 143
 144 }
 145
 146 /*
 147  * Function to release the frozen simq
 148  */
 149 static void pqi_release_camq( rcb_t *rcb )
 150 {
 151         pqisrc_softstate_t *softs;
 152         struct ccb_scsiio *csio;
 153
 154         csio = (struct ccb_scsiio *)&rcb->cm_ccb->csio;
 155         softs = rcb->softs;
 156
 157         DBG_FUNC("IN\n");
 158
 159         if (softs->os_specific.pqi_flags & PQI_FLAG_BUSY) {
 160                 softs->os_specific.pqi_flags &= ~PQI_FLAG_BUSY;
 161                 if (csio->ccb_h.status & CAM_RELEASE_SIMQ)
 162                         xpt_release_simq(xpt_path_sim(csio->ccb_h.path), 0);
 163                 else
 164                         csio->ccb_h.status |= CAM_RELEASE_SIMQ;
 165         }
 166
 167         DBG_FUNC("OUT\n");
 168 }
 169
 170 /*
 171  * Function to dma-unmap the completed request
 172  */
 173 static void pqi_unmap_request(void *arg)
 174 {
 175         pqisrc_softstate_t *softs;
 176         rcb_t *rcb;
 177
 178         DBG_IO("IN rcb = %p\n", arg);
 179
 180         rcb = (rcb_t *)arg;
 181         softs = rcb->softs;
 182
 183         if (!(rcb->cm_flags & PQI_CMD_MAPPED))
 184                 return;
 185
 186         if (rcb->bcount != 0 ) {
 187                 if (rcb->data_dir == SOP_DATA_DIR_FROM_DEVICE)
 188                         bus_dmamap_sync(softs->os_specific.pqi_buffer_dmat,
 189                                         rcb->cm_datamap,
 190                                         BUS_DMASYNC_POSTREAD);
 191                 if (rcb->data_dir == SOP_DATA_DIR_TO_DEVICE)
 192                         bus_dmamap_sync(softs->os_specific.pqi_buffer_dmat,
 193                                         rcb->cm_datamap,
 194                                         BUS_DMASYNC_POSTWRITE);
 195                 bus_dmamap_unload(softs->os_specific.pqi_buffer_dmat,
 196                                         rcb->cm_datamap);
 197         }
 198         rcb->cm_flags &= ~PQI_CMD_MAPPED;
 199
 200         if(rcb->sgt && rcb->nseg)
 201                 os_mem_free(rcb->softs, (void*)rcb->sgt,
 202                         rcb->nseg*sizeof(sgt_t));
 203
 204         pqisrc_put_tag(&softs->taglist, rcb->tag);
 205
 206         DBG_IO("OUT\n");
 207 }
 208
 209 /*
 210  * Construct meaningful LD name for volume here.
 211  */
 212 static void
 213 smartpqi_fix_ld_inquiry(pqisrc_softstate_t *softs, struct ccb_scsiio *csio)
 214 {
 215         struct scsi_inquiry_data *inq = NULL;
 216         uint8_t *cdb = NULL;
 217         pqi_scsi_dev_t *device = NULL;
 218
 219         DBG_FUNC("IN\n");
 220
 221         cdb = (csio->ccb_h.flags & CAM_CDB_POINTER) ?
 222                 (uint8_t *)csio->cdb_io.cdb_ptr : csio->cdb_io.cdb_bytes;
 223         if(cdb[0] == INQUIRY &&
 224                 (cdb[1] & SI_EVPD) == 0 &&
 225                 (csio->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN &&
 226                 csio->dxfer_len >= SHORT_INQUIRY_LENGTH) {
 227                 inq = (struct scsi_inquiry_data *)csio->data_ptr;
 228
 229                 device = softs->device_list[csio->ccb_h.target_id][csio->ccb_h.target_lun];
 230
 231                 /* Let the disks be probed and dealt with via CAM. Only for LD
 232                   let it fall through and inquiry be tweaked */
 233                 if( !device ||  !pqisrc_is_logical_device(device) ||
 234                                 (device->devtype != DISK_DEVICE)  ||
 235                                 pqisrc_is_external_raid_device(device)) {
 236                         return;
 237                 }
 238
 239                 strncpy(inq->vendor, "MSCC",
 240                         SID_VENDOR_SIZE);
 241                 strncpy(inq->product,
 242                         pqisrc_raidlevel_to_string(device->raid_level),
 243                         SID_PRODUCT_SIZE);
 244                 strncpy(inq->revision, device->volume_offline?"OFF":"OK",
 245                         SID_REVISION_SIZE);
 246         }
 247
 248         DBG_FUNC("OUT\n");
 249 }
 250
 251 /*
 252  * Handle completion of a command - pass results back through the CCB
 253  */
 254 void
 255 os_io_response_success(rcb_t *rcb)
 256 {
 257         struct ccb_scsiio               *csio;
 258
 259         DBG_IO("IN rcb = %p\n", rcb);
 260
 261         if (rcb == NULL)
 262                 panic("rcb is null");
 263
 264         csio = (struct ccb_scsiio *)&rcb->cm_ccb->csio;
 265
 266         if (csio == NULL)
 267                 panic("csio is null");
 268
 269         rcb->status = REQUEST_SUCCESS;
 270         csio->ccb_h.status = CAM_REQ_CMP;
 271
 272         smartpqi_fix_ld_inquiry(rcb->softs, csio);
 273         pqi_release_camq(rcb);
 274         pqi_unmap_request(rcb);
 275         xpt_done((union ccb *)csio);
 276
 277         DBG_IO("OUT\n");
 278 }
 279
 280 /*
 281  * Error response handling for raid IO
 282  */
 283 void os_raid_response_error(rcb_t *rcb, raid_path_error_info_elem_t *err_info)
 284 {
 285         struct ccb_scsiio *csio;
 286         pqisrc_softstate_t *softs;
 287
 288         DBG_IO("IN\n");
 289
 290         csio = (struct ccb_scsiio *)&rcb->cm_ccb->csio;
 291
 292         if (csio == NULL)
 293                 panic("csio is null");
 294
 295         softs = rcb->softs;
 296
 297         ASSERT(err_info != NULL);
 298         csio->scsi_status = err_info->status;
 299         csio->ccb_h.status = CAM_REQ_CMP_ERR;
 300
 301         if (csio->ccb_h.func_code == XPT_SCSI_IO) {
 302                 /*
 303                  * Handle specific SCSI status values.
 304                  */
 305                 switch(csio->scsi_status) {
 306                         case PQI_RAID_STATUS_QUEUE_FULL:
 307                                 csio->ccb_h.status = CAM_REQ_CMP;
 308                                 DBG_ERR("Queue Full error");
 309                                 break;
 310                                 /* check condition, sense data included */
 311                         case PQI_RAID_STATUS_CHECK_CONDITION:
 312                                 {
 313                                 uint16_t sense_data_len =
 314                                         LE_16(err_info->sense_data_len);
 315                                 uint8_t *sense_data = NULL;
 316                                 if (sense_data_len)
 317                                         sense_data = err_info->data;
 318                                 memset(&csio->sense_data, 0, csio->sense_len);
 319                                 sense_data_len = (sense_data_len >
 320                                                 csio->sense_len) ?
 321                                                 csio->sense_len :
 322                                                 sense_data_len;
 323                                 if (sense_data)
 324                                         memcpy(&csio->sense_data, sense_data,
 325                                                 sense_data_len);
 326                                 if (csio->sense_len > sense_data_len)
 327                                         csio->sense_resid = csio->sense_len
 328                                                         - sense_data_len;
 329                                         else
 330                                                 csio->sense_resid = 0;
 331                                 csio->ccb_h.status = CAM_SCSI_STATUS_ERROR
 332                                                         | CAM_AUTOSNS_VALID
 333                                                         | CAM_REQ_CMP_ERR;
 334                                 }
 335                                 break;
 336
 337                         case PQI_RAID_DATA_IN_OUT_UNDERFLOW:
 338                                 {
 339                                 uint32_t resid = 0;
 340                                 resid = rcb->bcount-err_info->data_out_transferred;
 341                                 csio->resid  = resid;
 342                                 csio->ccb_h.status = CAM_REQ_CMP;
 343                                 break;
 344                                 }
 345                         default:
 346                                 csio->ccb_h.status = CAM_REQ_CMP;
 347                                 break;
 348                 }
 349         }
 350
 351         if (softs->os_specific.pqi_flags & PQI_FLAG_BUSY) {
 352                 softs->os_specific.pqi_flags &= ~PQI_FLAG_BUSY;
 353                 if (csio->ccb_h.status & CAM_RELEASE_SIMQ)
 354                         xpt_release_simq(xpt_path_sim(csio->ccb_h.path), 0);
 355                 else
 356                         csio->ccb_h.status |= CAM_RELEASE_SIMQ;
 357         }
 358
 359         pqi_unmap_request(rcb);
 360         xpt_done((union ccb *)csio);
 361
 362         DBG_IO("OUT\n");
 363 }
 364
 365 /*
 366  * Error response handling for aio.
 367  */
 368 void os_aio_response_error(rcb_t *rcb, aio_path_error_info_elem_t *err_info)
 369 {
 370         struct ccb_scsiio *csio;
 371         pqisrc_softstate_t *softs;
 372
 373         DBG_IO("IN\n");
 374
 375         if (rcb == NULL)
 376                 panic("rcb is null");
 377
 378         rcb->status = REQUEST_SUCCESS;
 379         csio = (struct ccb_scsiio *)&rcb->cm_ccb->csio;
 380         if (csio == NULL)
 381                 panic("csio is null");
 382
 383         softs = rcb->softs;
 384
 385         switch (err_info->service_resp) {
 386                 case PQI_AIO_SERV_RESPONSE_COMPLETE:
 387                         csio->ccb_h.status = err_info->status;
 388                         break;
 389                 case PQI_AIO_SERV_RESPONSE_FAILURE:
 390                         switch(err_info->status) {
 391                                 case PQI_AIO_STATUS_IO_ABORTED:
 392                                         csio->ccb_h.status = CAM_REQ_ABORTED;
 393                                         DBG_WARN_BTL(rcb->dvp, "IO aborted\n");
 394                                         break;
 395                                 case PQI_AIO_STATUS_UNDERRUN:
 396                                         csio->ccb_h.status = CAM_REQ_CMP;
 397                                         csio->resid =
 398                                                 LE_32(err_info->resd_count);
 399                                         break;
 400                                 case PQI_AIO_STATUS_OVERRUN:
 401                                         csio->ccb_h.status = CAM_REQ_CMP;
 402                                         break;
 403                                 case PQI_AIO_STATUS_AIO_PATH_DISABLED:
 404                                         DBG_WARN_BTL(rcb->dvp,"AIO Path Disabled\n");
 405                                         rcb->dvp->offload_enabled = false;
 406                                         csio->ccb_h.status |= CAM_REQUEUE_REQ;
 407                                         break;
 408                                 case PQI_AIO_STATUS_IO_ERROR:
 409                                 case PQI_AIO_STATUS_IO_NO_DEVICE:
 410                                 case PQI_AIO_STATUS_INVALID_DEVICE:
 411                                 default:
 412                                         DBG_WARN_BTL(rcb->dvp,"IO Error/Invalid/No device\n");
 413                                         csio->ccb_h.status |=
 414                                                 CAM_SCSI_STATUS_ERROR;
 415                                         break;
 416                         }
 417                         break;
 418                 case PQI_AIO_SERV_RESPONSE_TMF_COMPLETE:
 419                 case PQI_AIO_SERV_RESPONSE_TMF_SUCCEEDED:
 420                         csio->ccb_h.status = CAM_REQ_CMP;
 421                         break;
 422                 case PQI_AIO_SERV_RESPONSE_TMF_REJECTED:
 423                 case PQI_AIO_SERV_RESPONSE_TMF_INCORRECT_LUN:
 424                         DBG_WARN_BTL(rcb->dvp,"TMF rejected/Incorrect Lun\n");
 425                         csio->ccb_h.status |= CAM_SCSI_STATUS_ERROR;
 426                         break;
 427                 default:
 428                         DBG_WARN_BTL(rcb->dvp,"Scsi Status Error\n");
 429                         csio->ccb_h.status |= CAM_SCSI_STATUS_ERROR;
 430                         break;
 431         }
 432         if(err_info->data_pres == DATA_PRESENT_SENSE_DATA ) {
 433                 csio->scsi_status = PQI_AIO_STATUS_CHECK_CONDITION;
 434                 uint8_t *sense_data = NULL;
 435                 unsigned sense_data_len = LE_16(err_info->data_len);
 436                 if (sense_data_len)
 437                         sense_data = err_info->data;
 438                 DBG_ERR_BTL(rcb->dvp, "SCSI_STATUS_CHECK_COND  sense size %u\n",
 439                         sense_data_len);
 440                 memset(&csio->sense_data, 0, csio->sense_len);
 441                 if (sense_data)
 442                         memcpy(&csio->sense_data, sense_data, ((sense_data_len >
 443                                 csio->sense_len) ? csio->sense_len : sense_data_len));
 444                 if (csio->sense_len > sense_data_len)
 445                         csio->sense_resid = csio->sense_len - sense_data_len;
 446                 else
 447                         csio->sense_resid = 0;
 448                 csio->ccb_h.status = CAM_SCSI_STATUS_ERROR | CAM_AUTOSNS_VALID;
 449         }
 450
 451         smartpqi_fix_ld_inquiry(softs, csio);
 452         pqi_release_camq(rcb);
 453         pqi_unmap_request(rcb);
 454         xpt_done((union ccb *)csio);
 455         DBG_IO("OUT\n");
 456 }
 457
 458 static void
 459 pqi_freeze_ccb(union ccb *ccb)
 460 {
 461         if ((ccb->ccb_h.status & CAM_DEV_QFRZN) == 0) {
 462                 ccb->ccb_h.status |= CAM_DEV_QFRZN;
 463                 xpt_freeze_devq(ccb->ccb_h.path, 1);
 464         }
 465 }
 466
 467 /*
 468  * Command-mapping helper function - populate this command's s/g table.
 469  */
 470 static void
 471 pqi_request_map_helper(void *arg, bus_dma_segment_t *segs, int nseg, int error)
 472 {
 473         pqisrc_softstate_t *softs;
 474         rcb_t *rcb;
 475
 476         rcb = (rcb_t *)arg;
 477         softs = rcb->softs;
 478
 479         if(  error || nseg > softs->pqi_cap.max_sg_elem )
 480         {
 481                 rcb->cm_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
 482                 pqi_freeze_ccb(rcb->cm_ccb);
 483                 DBG_ERR_BTL(rcb->dvp, "map failed err = %d or nseg(%d) > sgelem(%d)\n",
 484                         error, nseg, softs->pqi_cap.max_sg_elem);
 485                 pqi_unmap_request(rcb);
 486                 xpt_done((union ccb *)rcb->cm_ccb);
 487                 return;
 488         }
 489
 490         rcb->sgt = os_mem_alloc(softs, nseg * sizeof(rcb_t));
 491         if (rcb->sgt == NULL) {
 492                 rcb->cm_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
 493                 pqi_freeze_ccb(rcb->cm_ccb);
 494                 DBG_ERR_BTL(rcb->dvp, "os_mem_alloc() failed; nseg = %d\n", nseg);
 495                 pqi_unmap_request(rcb);
 496                 xpt_done((union ccb *)rcb->cm_ccb);
 497                 return;
 498         }
 499
 500         rcb->nseg = nseg;
 501         for (int i = 0; i < nseg; i++) {
 502                 rcb->sgt[i].addr = segs[i].ds_addr;
 503                 rcb->sgt[i].len = segs[i].ds_len;
 504                 rcb->sgt[i].flags = 0;
 505         }
 506
 507         if (rcb->data_dir == SOP_DATA_DIR_FROM_DEVICE)
 508                 bus_dmamap_sync(softs->os_specific.pqi_buffer_dmat,
 509                         rcb->cm_datamap, BUS_DMASYNC_PREREAD);
 510         if (rcb->data_dir == SOP_DATA_DIR_TO_DEVICE)
 511                 bus_dmamap_sync(softs->os_specific.pqi_buffer_dmat,
 512                         rcb->cm_datamap, BUS_DMASYNC_PREWRITE);
 513
 514         /* Call IO functions depending on pd or ld */
 515         rcb->status = REQUEST_PENDING;
 516
 517         error = pqisrc_build_send_io(softs, rcb);
 518
 519         if (error) {
 520                 rcb->req_pending = false;
 521                 rcb->cm_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
 522                 pqi_freeze_ccb(rcb->cm_ccb);
 523                 DBG_ERR_BTL(rcb->dvp, "Build IO failed, error = %d\n", error);
 524                 pqi_unmap_request(rcb);
 525                 xpt_done((union ccb *)rcb->cm_ccb);
 526                 return;
 527         }
 528 }
 529
 530 /*
 531  * Function to dma-map the request buffer
 532  */
 533 static int pqi_map_request( rcb_t *rcb )
 534 {
 535         pqisrc_softstate_t *softs = rcb->softs;
 536         int error = PQI_STATUS_SUCCESS;
 537         union ccb *ccb = rcb->cm_ccb;
 538
 539         DBG_FUNC("IN\n");
 540
 541         /* check that mapping is necessary */
 542         if (rcb->cm_flags & PQI_CMD_MAPPED)
 543                 return(0);
 544         rcb->cm_flags |= PQI_CMD_MAPPED;
 545
 546         if (rcb->bcount) {
 547                 error = bus_dmamap_load_ccb(softs->os_specific.pqi_buffer_dmat,
 548                         rcb->cm_datamap, ccb, pqi_request_map_helper, rcb, 0);
 549                 if (error != 0){
 550                         DBG_ERR_BTL(rcb->dvp, "bus_dmamap_load_ccb failed = %d count = %d\n",
 551                                         error, rcb->bcount);
 552                         return error;
 553                 }
 554         } else {
 555                 /*
 556                  * Set up the command to go to the controller.  If there are no
 557                  * data buffers associated with the command then it can bypass
 558                  * busdma.
 559                  */
 560                 /* Call IO functions depending on pd or ld */
 561                 rcb->status = REQUEST_PENDING;
 562
 563                 error = pqisrc_build_send_io(softs, rcb);
 564         }
 565
 566         DBG_FUNC("OUT error = %d\n", error);
 567
 568         return error;
 569 }
 570
 571 /*
 572  * Function to clear the request control block
 573  */
 574 void os_reset_rcb( rcb_t *rcb )
 575 {
 576         rcb->error_info = NULL;
 577         rcb->req = NULL;
 578         rcb->status = -1;
 579         rcb->tag = INVALID_ELEM;
 580         rcb->dvp = NULL;
 581         rcb->cdbp = NULL;
 582         rcb->softs = NULL;
 583         rcb->cm_flags = 0;
 584         rcb->cm_data = NULL;
 585         rcb->bcount = 0;
 586         rcb->nseg = 0;
 587         rcb->sgt = NULL;
 588         rcb->cm_ccb = NULL;
 589         rcb->encrypt_enable = false;
 590         rcb->ioaccel_handle = 0;
 591         rcb->resp_qid = 0;
 592         rcb->req_pending = false;
 593 }
 594
 595 /*
 596  * Callback function for the lun rescan
 597  */
 598 static void smartpqi_lunrescan_cb(struct cam_periph *periph, union ccb *ccb)
 599 {
 600         xpt_free_path(ccb->ccb_h.path);
 601         xpt_free_ccb(ccb);
 602 }
 603
 604 /*
 605  * Function to rescan the lun
 606  */
 607 static void smartpqi_lun_rescan(struct pqisrc_softstate *softs, int target,
 608                         int lun)
 609 {
 610         union ccb   *ccb = NULL;
 611         cam_status  status = 0;
 612         struct cam_path     *path = NULL;
 613
 614         DBG_FUNC("IN\n");
 615
 616         ccb = xpt_alloc_ccb_nowait();
 617         status = xpt_create_path(&path, NULL,
 618                                 cam_sim_path(softs->os_specific.sim), target, lun);
 619         if (status != CAM_REQ_CMP) {
 620                 DBG_ERR("xpt_create_path status(%d) != CAM_REQ_CMP \n",
 621                                  status);
 622                 xpt_free_ccb(ccb);
 623                 return;
 624         }
 625
 626         bzero(ccb, sizeof(union ccb));
 627         xpt_setup_ccb(&ccb->ccb_h, path, 5);
 628         ccb->ccb_h.func_code = XPT_SCAN_LUN;
 629         ccb->ccb_h.cbfcnp = smartpqi_lunrescan_cb;
 630         ccb->crcn.flags = CAM_FLAG_NONE;
 631
 632         xpt_action(ccb);
 633
 634         DBG_FUNC("OUT\n");
 635 }
 636
 637 /*
 638  * Function to rescan the lun under each target
 639  */
 640 void smartpqi_target_rescan(struct pqisrc_softstate *softs)
 641 {
 642         int target = 0, lun = 0;
 643
 644         DBG_FUNC("IN\n");
 645
 646         for(target = 0; target < PQI_MAX_DEVICES; target++){
 647                 for(lun = 0; lun < PQI_MAX_MULTILUN; lun++){
 648                         if(softs->device_list[target][lun]){
 649                                 smartpqi_lun_rescan(softs, target, lun);
 650                         }
 651                 }
 652         }
 653
 654         DBG_FUNC("OUT\n");
 655 }
 656
 657 /*
 658  * Set the mode of tagged command queueing for the current task.
 659  */
 660 uint8_t os_get_task_attr(rcb_t *rcb)
 661 {
 662         union ccb *ccb = rcb->cm_ccb;
 663         uint8_t tag_action = SOP_TASK_ATTRIBUTE_SIMPLE;
 664
 665         switch(ccb->csio.tag_action) {
 666         case MSG_HEAD_OF_Q_TAG:
 667                 tag_action = SOP_TASK_ATTRIBUTE_HEAD_OF_QUEUE;
 668                 break;
 669         case MSG_ORDERED_Q_TAG:
 670                 tag_action = SOP_TASK_ATTRIBUTE_ORDERED;
 671                 break;
 672         case MSG_SIMPLE_Q_TAG:
 673         default:
 674                 tag_action = SOP_TASK_ATTRIBUTE_SIMPLE;
 675                 break;
 676         }
 677         return tag_action;
 678 }
 679
 680 /*
 681  * Complete all outstanding commands
 682  */
 683 void os_complete_outstanding_cmds_nodevice(pqisrc_softstate_t *softs)
 684 {
 685         int tag = 0;
 686
 687         DBG_FUNC("IN\n");
 688
 689         for (tag = 1; tag < softs->max_outstanding_io; tag++) {
 690                 rcb_t *prcb = &softs->rcb[tag];
 691                 if(prcb->req_pending && prcb->cm_ccb ) {
 692                         prcb->req_pending = false;
 693                         prcb->cm_ccb->ccb_h.status = CAM_REQ_ABORTED | CAM_REQ_CMP;
 694                         xpt_done((union ccb *)prcb->cm_ccb);
 695                         prcb->cm_ccb = NULL;
 696                 }
 697         }
 698
 699         DBG_FUNC("OUT\n");
 700 }
 701
 702 /*
 703  * IO handling functionality entry point
 704  */
 705 static int pqisrc_io_start(struct cam_sim *sim, union ccb *ccb)
 706 {
 707         rcb_t *rcb;
 708         uint32_t tag, no_transfer = 0;
 709         pqisrc_softstate_t *softs = (struct pqisrc_softstate *)
 710                                         cam_sim_softc(sim);
 711         int32_t error = PQI_STATUS_FAILURE;
 712         pqi_scsi_dev_t *dvp;
 713
 714         DBG_FUNC("IN\n");
 715
 716         if( softs->device_list[ccb->ccb_h.target_id][ccb->ccb_h.target_lun] == NULL ) {
 717                 ccb->ccb_h.status = CAM_DEV_NOT_THERE;
 718                 DBG_INFO("Device  = %d not there\n", ccb->ccb_h.target_id);
 719                 return PQI_STATUS_FAILURE;
 720         }
 721
 722         dvp = softs->device_list[ccb->ccb_h.target_id][ccb->ccb_h.target_lun];
 723         /* Check  controller state */
 724         if (IN_PQI_RESET(softs)) {
 725                 ccb->ccb_h.status = CAM_SCSI_BUS_RESET
 726                                         | CAM_BUSY | CAM_REQ_INPROG;
 727                 DBG_WARN("Device  = %d BUSY/IN_RESET\n", ccb->ccb_h.target_id);
 728                 return error;
 729         }
 730         /* Check device state */
 731         if (pqisrc_ctrl_offline(softs) || DEV_GONE(dvp)) {
 732                 ccb->ccb_h.status = CAM_DEV_NOT_THERE | CAM_REQ_CMP;
 733                 DBG_WARN("Device  = %d GONE/OFFLINE\n", ccb->ccb_h.target_id);
 734                 return error;
 735         }
 736         /* Check device reset */
 737         if (dvp->reset_in_progress) {
 738                 ccb->ccb_h.status = CAM_SCSI_BUSY | CAM_REQ_INPROG | CAM_BUSY;
 739                 DBG_WARN("Device %d reset returned busy\n", ccb->ccb_h.target_id);
 740                 return error;
 741         }
 742
 743         if (dvp->expose_device == false) {
 744                 ccb->ccb_h.status = CAM_DEV_NOT_THERE;
 745                 DBG_INFO("Device  = %d not exposed\n", ccb->ccb_h.target_id);
 746                 return error;
 747         }
 748
 749         tag = pqisrc_get_tag(&softs->taglist);
 750         if( tag == INVALID_ELEM ) {
 751                 DBG_ERR("Get Tag failed\n");
 752                 xpt_freeze_simq(softs->os_specific.sim, 1);
 753                 softs->os_specific.pqi_flags |= PQI_FLAG_BUSY;
 754                 ccb->ccb_h.status |= (CAM_REQUEUE_REQ | CAM_RELEASE_SIMQ);
 755                 return PQI_STATUS_FAILURE;
 756         }
 757
 758         DBG_IO("tag = %d &softs->taglist : %p\n", tag, &softs->taglist);
 759
 760         rcb = &softs->rcb[tag];
 761         os_reset_rcb( rcb );
 762         rcb->tag = tag;
 763         rcb->softs = softs;
 764         rcb->cmdlen = ccb->csio.cdb_len;
 765         ccb->ccb_h.sim_priv.entries[0].ptr = rcb;
 766
 767         switch (ccb->ccb_h.flags & CAM_DIR_MASK) {
 768                 case CAM_DIR_IN:
 769                         rcb->data_dir = SOP_DATA_DIR_FROM_DEVICE;
 770                         break;
 771                 case CAM_DIR_OUT:
 772                         rcb->data_dir = SOP_DATA_DIR_TO_DEVICE;
 773                         break;
 774                 case CAM_DIR_NONE:
 775                         no_transfer = 1;
 776                         break;
 777                 default:
 778                         DBG_ERR("Unknown Dir\n");
 779                         break;
 780         }
 781         rcb->cm_ccb = ccb;
 782         rcb->dvp = softs->device_list[ccb->ccb_h.target_id][ccb->ccb_h.target_lun];
 783
 784         if (!no_transfer) {
 785                 rcb->cm_data = (void *)ccb->csio.data_ptr;
 786                 rcb->bcount = ccb->csio.dxfer_len;
 787         } else {
 788                 rcb->cm_data = NULL;
 789                 rcb->bcount = 0;
 790         }
 791         /*
 792          * Submit the request to the adapter.
 793          *
 794          * Note that this may fail if we're unable to map the request (and
 795          * if we ever learn a transport layer other than simple, may fail
 796          * if the adapter rejects the command).
 797          */
 798         if ((error = pqi_map_request(rcb)) != 0) {
 799                 rcb->req_pending = false;
 800                 xpt_freeze_simq(softs->os_specific.sim, 1);
 801                 ccb->ccb_h.status |= CAM_RELEASE_SIMQ;
 802                 if (error == EINPROGRESS) {
 803                         DBG_WARN("In Progress on %d\n", ccb->ccb_h.target_id);
 804                         error = 0;
 805                 } else {
 806                         ccb->ccb_h.status |= CAM_REQUEUE_REQ;
 807                         DBG_WARN("Requeue req error = %d target = %d\n", error,
 808                                 ccb->ccb_h.target_id);
 809                         pqi_unmap_request(rcb);
 810                 }
 811         }
 812
 813         DBG_FUNC("OUT error = %d\n", error);
 814         return error;
 815 }
 816
 817 /*
 818  * Abort a task, task management functionality
 819  */
 820 static int
 821 pqisrc_scsi_abort_task(pqisrc_softstate_t *softs,  union ccb *ccb)
 822 {
 823         rcb_t *rcb = ccb->ccb_h.sim_priv.entries[0].ptr;
 824         uint32_t abort_tag = rcb->tag;
 825         uint32_t tag = 0;
 826         int rval = PQI_STATUS_SUCCESS;
 827         uint16_t qid;
 828
 829     DBG_FUNC("IN\n");
 830
 831         qid = (uint16_t)rcb->resp_qid;
 832
 833         tag = pqisrc_get_tag(&softs->taglist);
 834         rcb = &softs->rcb[tag];
 835         rcb->tag = tag;
 836         rcb->resp_qid = qid;
 837
 838         rval = pqisrc_send_tmf(softs, rcb->dvp, rcb, abort_tag,
 839                 SOP_TASK_MANAGEMENT_FUNCTION_ABORT_TASK);
 840
 841         if (PQI_STATUS_SUCCESS == rval) {
 842                 rval = rcb->status;
 843                 if (REQUEST_SUCCESS == rval) {
 844                         ccb->ccb_h.status = CAM_REQ_ABORTED;
 845                 }
 846         }
 847         pqisrc_put_tag(&softs->taglist, abort_tag);
 848         pqisrc_put_tag(&softs->taglist,rcb->tag);
 849
 850         DBG_FUNC("OUT rval = %d\n", rval);
 851
 852         return rval;
 853 }
 854
 855 /*
 856  * Abort a taskset, task management functionality
 857  */
 858 static int
 859 pqisrc_scsi_abort_task_set(pqisrc_softstate_t *softs, union ccb *ccb)
 860 {
 861         rcb_t *rcb = NULL;
 862         uint32_t tag = 0;
 863         int rval = PQI_STATUS_SUCCESS;
 864
 865         DBG_FUNC("IN\n");
 866
 867         tag = pqisrc_get_tag(&softs->taglist);
 868         rcb = &softs->rcb[tag];
 869         rcb->tag = tag;
 870
 871         rval = pqisrc_send_tmf(softs, rcb->dvp, rcb, 0,
 872                         SOP_TASK_MANAGEMENT_FUNCTION_ABORT_TASK_SET);
 873
 874         if (rval == PQI_STATUS_SUCCESS) {
 875                 rval = rcb->status;
 876         }
 877
 878         pqisrc_put_tag(&softs->taglist,rcb->tag);
 879
 880         DBG_FUNC("OUT rval = %d\n", rval);
 881
 882         return rval;
 883 }
 884
 885 /*
 886  * Target reset task management functionality
 887  */
 888 static int
 889 pqisrc_target_reset( pqisrc_softstate_t *softs,  union ccb *ccb)
 890 {
 891         pqi_scsi_dev_t *devp = softs->device_list[ccb->ccb_h.target_id][ccb->ccb_h.target_lun];
 892         rcb_t *rcb = NULL;
 893         uint32_t tag = 0;
 894         int rval = PQI_STATUS_SUCCESS;
 895
 896         DBG_FUNC("IN\n");
 897
 898         if (devp == NULL) {
 899                 DBG_ERR("bad target t%d\n", ccb->ccb_h.target_id);
 900                 return (-1);
 901         }
 902
 903         tag = pqisrc_get_tag(&softs->taglist);
 904         rcb = &softs->rcb[tag];
 905         rcb->tag = tag;
 906
 907         devp->reset_in_progress = true;
 908         rval = pqisrc_send_tmf(softs, devp, rcb, 0,
 909                 SOP_TASK_MANAGEMENT_LUN_RESET);
 910         if (PQI_STATUS_SUCCESS == rval) {
 911                 rval = rcb->status;
 912         }
 913         devp->reset_in_progress = false;
 914         pqisrc_put_tag(&softs->taglist,rcb->tag);
 915
 916         DBG_FUNC("OUT rval = %d\n", rval);
 917
 918         return ((rval == REQUEST_SUCCESS) ?
 919                 PQI_STATUS_SUCCESS : PQI_STATUS_FAILURE);
 920 }
 921
 922 /*
 923  * cam entry point of the smartpqi module.
 924  */
 925 static void smartpqi_cam_action(struct cam_sim *sim, union ccb *ccb)
 926 {
 927         struct pqisrc_softstate *softs = cam_sim_softc(sim);
 928         struct ccb_hdr  *ccb_h = &ccb->ccb_h;
 929
 930         DBG_FUNC("IN\n");
 931
 932         switch (ccb_h->func_code) {
 933                 case XPT_SCSI_IO:
 934                 {
 935                         if(!pqisrc_io_start(sim, ccb)) {
 936                                 return;
 937                         }
 938                         break;
 939                 }
 940                 case XPT_CALC_GEOMETRY:
 941                 {
 942                         struct ccb_calc_geometry *ccg;
 943                         ccg = &ccb->ccg;
 944                         if (ccg->block_size == 0) {
 945                                 ccb->ccb_h.status &= ~CAM_SIM_QUEUED;
 946                                 ccb->ccb_h.status = CAM_REQ_INVALID;
 947                                 break;
 948                         }
 949                         cam_calc_geometry(ccg, /* extended */ 1);
 950                         ccb->ccb_h.status = CAM_REQ_CMP;
 951                         break;
 952                 }
 953                 case XPT_PATH_INQ:
 954                 {
 955                         update_sim_properties(sim, &ccb->cpi);
 956                         ccb->ccb_h.status = CAM_REQ_CMP;
 957                         break;
 958                 }
 959                 case XPT_GET_TRAN_SETTINGS:
 960                         get_transport_settings(softs, &ccb->cts);
 961                         ccb->ccb_h.status = CAM_REQ_CMP;
 962                         break;
 963                 case XPT_ABORT:
 964                         if(pqisrc_scsi_abort_task(softs,  ccb)) {
 965                                 ccb->ccb_h.status = CAM_REQ_CMP_ERR;
 966                                 xpt_done(ccb);
 967                                 DBG_ERR("Abort task failed on %d\n",
 968                                         ccb->ccb_h.target_id);
 969                                 return;
 970                         }
 971                         break;
 972                 case XPT_TERM_IO:
 973                         if (pqisrc_scsi_abort_task_set(softs,  ccb)) {
 974                                 ccb->ccb_h.status = CAM_REQ_CMP_ERR;
 975                                 DBG_ERR("Abort task set failed on %d\n",
 976                                         ccb->ccb_h.target_id);
 977                                 xpt_done(ccb);
 978                                 return;
 979                         }
 980                         break;
 981                 case XPT_RESET_DEV:
 982                         if(pqisrc_target_reset(softs,  ccb)) {
 983                                 ccb->ccb_h.status = CAM_REQ_CMP_ERR;
 984                                 DBG_ERR("Target reset failed on %d\n",
 985                                         ccb->ccb_h.target_id);
 986                                 xpt_done(ccb);
 987                                 return;
 988                         } else {
 989                                 ccb->ccb_h.status = CAM_REQ_CMP;
 990                         }
 991                         break;
 992                 case XPT_RESET_BUS:
 993                         ccb->ccb_h.status = CAM_REQ_CMP;
 994                         break;
 995                 case XPT_SET_TRAN_SETTINGS:
 996                         ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
 997                         return;
 998                 default:
 999                         DBG_WARN("UNSUPPORTED FUNC CODE\n");
1000                         ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
1001                         break;
1002         }
1003         xpt_done(ccb);
1004
1005         DBG_FUNC("OUT\n");
1006 }
1007
1008 /*
1009  * Function to poll the response, when interrupts are unavailable
1010  * This also serves supporting crash dump.
1011  */
1012 static void smartpqi_poll(struct cam_sim *sim)
1013 {
1014         struct pqisrc_softstate *softs = cam_sim_softc(sim);
1015         int i;
1016
1017         for (i = 1; i < softs->intr_count; i++ )
1018                 pqisrc_process_response_queue(softs, i);
1019 }
1020
1021 /*
1022  * Function to adjust the queue depth of a device
1023  */
1024 void smartpqi_adjust_queue_depth(struct cam_path *path, uint32_t queue_depth)
1025 {
1026         struct ccb_relsim crs;
1027
1028         DBG_INFO("IN\n");
1029
1030         xpt_setup_ccb(&crs.ccb_h, path, 5);
1031         crs.ccb_h.func_code = XPT_REL_SIMQ;
1032         crs.ccb_h.flags = CAM_DEV_QFREEZE;
1033         crs.release_flags = RELSIM_ADJUST_OPENINGS;
1034         crs.openings = queue_depth;
1035         xpt_action((union ccb *)&crs);
1036         if(crs.ccb_h.status != CAM_REQ_CMP) {
1037                 printf("XPT_REL_SIMQ failed stat=%d\n", crs.ccb_h.status);
1038         }
1039
1040         DBG_INFO("OUT\n");
1041 }
1042
1043 /*
1044  * Function to register async callback for setting queue depth
1045  */
1046 static void
1047 smartpqi_async(void *callback_arg, u_int32_t code,
1048                 struct cam_path *path, void *arg)
1049 {
1050         struct pqisrc_softstate *softs;
1051         softs = (struct pqisrc_softstate*)callback_arg;
1052
1053         DBG_FUNC("IN\n");
1054
1055         switch (code) {
1056                 case AC_FOUND_DEVICE:
1057                 {
1058                         struct ccb_getdev *cgd;
1059                         cgd = (struct ccb_getdev *)arg;
1060                         if (cgd == NULL) {
1061                                 break;
1062                         }
1063                         uint32_t t_id = cgd->ccb_h.target_id;
1064
1065                         if (t_id <= (PQI_CTLR_INDEX - 1)) {
1066                                 if (softs != NULL) {
1067                                         pqi_scsi_dev_t *dvp = softs->device_list[t_id][cgd->ccb_h.target_lun];
1068                                         smartpqi_adjust_queue_depth(path,
1069                                                         dvp->queue_depth);
1070                                 }
1071                         }
1072                         break;
1073                 }
1074                 default:
1075                         break;
1076         }
1077
1078         DBG_FUNC("OUT\n");
1079 }
1080
1081 /*
1082  * Function to register sim with CAM layer for smartpqi driver
1083  */
1084 int register_sim(struct pqisrc_softstate *softs, int card_index)
1085 {
1086         int error = 0;
1087         int max_transactions;
1088         union ccb   *ccb = NULL;
1089         cam_status status = 0;
1090         struct ccb_setasync csa;
1091         struct cam_sim *sim;
1092
1093         DBG_FUNC("IN\n");
1094
1095         max_transactions = softs->max_io_for_scsi_ml;
1096         softs->os_specific.devq = cam_simq_alloc(max_transactions);
1097         if (softs->os_specific.devq == NULL) {
1098                 DBG_ERR("cam_simq_alloc failed txns = %d\n",
1099                         max_transactions);
1100                 return PQI_STATUS_FAILURE;
1101         }
1102
1103         sim = cam_sim_alloc(smartpqi_cam_action, \
1104                                 smartpqi_poll, "smartpqi", softs, \
1105                                 card_index, &softs->os_specific.cam_lock, \
1106                                 1, max_transactions, softs->os_specific.devq);
1107         if (sim == NULL) {
1108                 DBG_ERR("cam_sim_alloc failed txns = %d\n",
1109                         max_transactions);
1110                 cam_simq_free(softs->os_specific.devq);
1111                 return PQI_STATUS_FAILURE;
1112         }
1113
1114         softs->os_specific.sim = sim;
1115         mtx_lock(&softs->os_specific.cam_lock);
1116         status = xpt_bus_register(sim, softs->os_specific.pqi_dev, 0);
1117         if (status != CAM_SUCCESS) {
1118                 DBG_ERR("xpt_bus_register failed status=%d\n", status);
1119                 cam_sim_free(softs->os_specific.sim, FALSE);
1120                 cam_simq_free(softs->os_specific.devq);
1121                 mtx_unlock(&softs->os_specific.cam_lock);
1122                 return PQI_STATUS_FAILURE;
1123         }
1124
1125         softs->os_specific.sim_registered = TRUE;
1126         ccb = xpt_alloc_ccb_nowait();
1127         if (ccb == NULL) {
1128                 DBG_ERR("xpt_create_path failed\n");
1129                 return PQI_STATUS_FAILURE;
1130         }
1131
1132         if (xpt_create_path(&ccb->ccb_h.path, NULL,
1133                         cam_sim_path(softs->os_specific.sim),
1134                         CAM_TARGET_WILDCARD,
1135                         CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
1136                 DBG_ERR("xpt_create_path failed\n");
1137                 xpt_free_ccb(ccb);
1138                 xpt_bus_deregister(cam_sim_path(softs->os_specific.sim));
1139                 cam_sim_free(softs->os_specific.sim, TRUE);
1140                 mtx_unlock(&softs->os_specific.cam_lock);
1141                 return PQI_STATUS_FAILURE;
1142         }
1143         /*
1144          * Callback to set the queue depth per target which is
1145          * derived from the FW.
1146          */
1147         softs->os_specific.path = ccb->ccb_h.path;
1148         xpt_setup_ccb(&csa.ccb_h, softs->os_specific.path, 5);
1149         csa.ccb_h.func_code = XPT_SASYNC_CB;
1150         csa.event_enable = AC_FOUND_DEVICE;
1151         csa.callback = smartpqi_async;
1152         csa.callback_arg = softs;
1153         xpt_action((union ccb *)&csa);
1154         if (csa.ccb_h.status != CAM_REQ_CMP) {
1155                 DBG_ERR("Unable to register smartpqi_aysnc handler: %d!\n",
1156                         csa.ccb_h.status);
1157         }
1158
1159         mtx_unlock(&softs->os_specific.cam_lock);
1160         DBG_INFO("OUT\n");
1161         return error;
1162 }
1163
1164 /*
1165  * Function to deregister smartpqi sim from cam layer
1166  */
1167 void deregister_sim(struct pqisrc_softstate *softs)
1168 {
1169         struct ccb_setasync csa;
1170
1171         DBG_FUNC("IN\n");
1172
1173         if (softs->os_specific.mtx_init) {
1174                 mtx_lock(&softs->os_specific.cam_lock);
1175         }
1176
1177         xpt_setup_ccb(&csa.ccb_h, softs->os_specific.path, 5);
1178         csa.ccb_h.func_code = XPT_SASYNC_CB;
1179         csa.event_enable = 0;
1180         csa.callback = smartpqi_async;
1181         csa.callback_arg = softs;
1182         xpt_action((union ccb *)&csa);
1183         xpt_free_path(softs->os_specific.path);
1184
1185         xpt_release_simq(softs->os_specific.sim, 0);
1186
1187         xpt_bus_deregister(cam_sim_path(softs->os_specific.sim));
1188         softs->os_specific.sim_registered = FALSE;
1189
1190         if (softs->os_specific.sim) {
1191                 cam_sim_free(softs->os_specific.sim, FALSE);
1192                 softs->os_specific.sim = NULL;
1193         }
1194         if (softs->os_specific.mtx_init) {
1195                 mtx_unlock(&softs->os_specific.cam_lock);
1196         }
1197         if (softs->os_specific.devq != NULL) {
1198                 cam_simq_free(softs->os_specific.devq);
1199         }
1200         if (softs->os_specific.mtx_init) {
1201                 mtx_destroy(&softs->os_specific.cam_lock);
1202                 softs->os_specific.mtx_init = FALSE;
1203         }
1204
1205         mtx_destroy(&softs->os_specific.map_lock);
1206
1207         DBG_FUNC("OUT\n");
1208 }