sys/dev/twa/tw_osl_cam.c

   1 /*
   2  * Copyright (c) 2004-07 Applied Micro Circuits Corporation.
   3  * Copyright (c) 2004-05 Vinod Kashyap.
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  *
  15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  25  * SUCH DAMAGE.
  26  *
  27  *      $FreeBSD$
  28  */
  29
  30 /*
  31  * AMCC'S 3ware driver for 9000 series storage controllers.
  32  *
  33  * Author: Vinod Kashyap
  34  * Modifications by: Adam Radford
  35  * Modifications by: Manjunath Ranganathaiah
  36  */
  37
  38
  39 /*
  40  * FreeBSD CAM related functions.
  41  */
  42
  43
  44 #include <dev/twa/tw_osl_includes.h>
  45
  46 #include <cam/cam.h>
  47 #include <cam/cam_ccb.h>
  48 #include <cam/cam_sim.h>
  49 #include <cam/cam_xpt_sim.h>
  50 #include <cam/cam_debug.h>
  51 #include <cam/cam_periph.h>
  52
  53 #include <cam/scsi/scsi_all.h>
  54 #include <cam/scsi/scsi_message.h>
  55
  56 static TW_VOID  twa_action(struct cam_sim *sim, union ccb *ccb);
  57 static TW_VOID  twa_poll(struct cam_sim *sim);
  58
  59 static TW_INT32 tw_osli_execute_scsi(struct tw_osli_req_context *req,
  60         union ccb *ccb);
  61
  62
  63
  64 /*
  65  * Function name:       tw_osli_cam_attach
  66  * Description:         Attaches the driver to CAM.
  67  *
  68  * Input:               sc      -- ptr to OSL internal ctlr context
  69  * Output:              None
  70  * Return value:        0       -- success
  71  *                      non-zero-- failure
  72  */
  73 TW_INT32
  74 tw_osli_cam_attach(struct twa_softc *sc)
  75 {
  76         struct cam_devq         *devq;
  77
  78         tw_osli_dbg_dprintf(3, sc, "entered");
  79
  80         /*
  81          * Create the device queue for our SIM.
  82          */
  83         if ((devq = cam_simq_alloc(TW_OSLI_MAX_NUM_IOS)) == NULL) {
  84                 tw_osli_printf(sc, "error = %d",
  85                         TW_CL_SEVERITY_ERROR_STRING,
  86                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
  87                         0x2100,
  88                         "Failed to create SIM device queue",
  89                         ENOMEM);
  90                 return(ENOMEM);
  91         }
  92
  93         /*
  94          * Create a SIM entry.  Though we can support TW_OSLI_MAX_NUM_REQUESTS
  95          * simultaneous requests, we claim to be able to handle only
  96          * TW_OSLI_MAX_NUM_IOS (two less), so that we always have a request
  97          * packet available to service ioctls and AENs.
  98          */
  99         tw_osli_dbg_dprintf(3, sc, "Calling cam_sim_alloc");
 100         sc->sim = cam_sim_alloc(twa_action, twa_poll, "twa", sc,
 101                         device_get_unit(sc->bus_dev), sc->sim_lock,
 102                         TW_OSLI_MAX_NUM_IOS, 1, devq);
 103         if (sc->sim == NULL) {
 104                 cam_simq_free(devq);
 105                 tw_osli_printf(sc, "error = %d",
 106                         TW_CL_SEVERITY_ERROR_STRING,
 107                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 108                         0x2101,
 109                         "Failed to create a SIM entry",
 110                         ENOMEM);
 111                 return(ENOMEM);
 112         }
 113
 114         /*
 115          * Register the bus.
 116          */
 117         tw_osli_dbg_dprintf(3, sc, "Calling xpt_bus_register");
 118         mtx_lock(sc->sim_lock);
 119         if (xpt_bus_register(sc->sim, sc->bus_dev, 0) != CAM_SUCCESS) {
 120                 cam_sim_free(sc->sim, TRUE);
 121                 sc->sim = NULL; /* so cam_detach will not try to free it */
 122                 tw_osli_printf(sc, "error = %d",
 123                         TW_CL_SEVERITY_ERROR_STRING,
 124                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 125                         0x2102,
 126                         "Failed to register the bus",
 127                         ENXIO);
 128                 mtx_unlock(sc->sim_lock);
 129                 return(ENXIO);
 130         }
 131
 132         tw_osli_dbg_dprintf(3, sc, "Calling xpt_create_path");
 133         if (xpt_create_path(&sc->path, NULL,
 134                                 cam_sim_path(sc->sim),
 135                                 CAM_TARGET_WILDCARD,
 136                                 CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
 137                 xpt_bus_deregister(cam_sim_path (sc->sim));
 138                 /* Passing TRUE to cam_sim_free will free the devq as well. */
 139                 cam_sim_free(sc->sim, TRUE);
 140                 tw_osli_printf(sc, "error = %d",
 141                         TW_CL_SEVERITY_ERROR_STRING,
 142                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 143                         0x2103,
 144                         "Failed to create path",
 145                         ENXIO);
 146                 mtx_unlock(sc->sim_lock);
 147                 return(ENXIO);
 148         }
 149         mtx_unlock(sc->sim_lock);
 150
 151         tw_osli_dbg_dprintf(3, sc, "exiting");
 152         return(0);
 153 }
 154
 155
 156
 157 /*
 158  * Function name:       tw_osli_cam_detach
 159  * Description:         Detaches the driver from CAM.
 160  *
 161  * Input:               sc      -- ptr to OSL internal ctlr context
 162  * Output:              None
 163  * Return value:        None
 164  */
 165 TW_VOID
 166 tw_osli_cam_detach(struct twa_softc *sc)
 167 {
 168         tw_osli_dbg_dprintf(3, sc, "entered");
 169
 170         mtx_lock(sc->sim_lock);
 171
 172         if (sc->path)
 173                 xpt_free_path(sc->path);
 174         if (sc->sim) {
 175                 xpt_bus_deregister(cam_sim_path(sc->sim));
 176                 /* Passing TRUE to cam_sim_free will free the devq as well. */
 177                 cam_sim_free(sc->sim, TRUE);
 178         }
 179         /* It's ok have 1 hold count while destroying the mutex */
 180         mtx_destroy(sc->sim_lock);
 181 }
 182
 183
 184
 185 /*
 186  * Function name:       tw_osli_execute_scsi
 187  * Description:         Build a fw cmd, based on a CAM style ccb, and
 188  *                      send it down.
 189  *
 190  * Input:               req     -- ptr to OSL internal request context
 191  *                      ccb     -- ptr to CAM style ccb
 192  * Output:              None
 193  * Return value:        0       -- success
 194  *                      non-zero-- failure
 195  */
 196 TW_INT32
 197 tw_osli_execute_scsi(struct tw_osli_req_context *req, union ccb *ccb)
 198 {
 199         struct twa_softc                *sc = req->ctlr;
 200         struct tw_cl_req_packet         *req_pkt;
 201         struct tw_cl_scsi_req_packet    *scsi_req;
 202         struct ccb_hdr                  *ccb_h = &(ccb->ccb_h);
 203         struct ccb_scsiio               *csio = &(ccb->csio);
 204         TW_INT32                        error;
 205
 206         tw_osli_dbg_dprintf(10, sc, "SCSI I/O request 0x%x",
 207                 csio->cdb_io.cdb_bytes[0]);
 208
 209         if (ccb_h->target_id >= TW_CL_MAX_NUM_UNITS) {
 210                 tw_osli_dbg_dprintf(3, sc, "Invalid target. PTL = %x %x %x",
 211                         ccb_h->path_id, ccb_h->target_id, ccb_h->target_lun);
 212                 ccb_h->status |= CAM_TID_INVALID;
 213                 xpt_done(ccb);
 214                 return(1);
 215         }
 216         if (ccb_h->target_lun >= TW_CL_MAX_NUM_LUNS) {
 217                 tw_osli_dbg_dprintf(3, sc, "Invalid lun. PTL = %x %x %x",
 218                         ccb_h->path_id, ccb_h->target_id, ccb_h->target_lun);
 219                 ccb_h->status |= CAM_LUN_INVALID;
 220                 xpt_done(ccb);
 221                 return(1);
 222         }
 223
 224         if(ccb_h->flags & CAM_CDB_PHYS) {
 225                 tw_osli_printf(sc, "",
 226                         TW_CL_SEVERITY_ERROR_STRING,
 227                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 228                         0x2105,
 229                         "Physical CDB address!");
 230                 ccb_h->status = CAM_REQ_INVALID;
 231                 xpt_done(ccb);
 232                 return(1);
 233         }
 234
 235         /*
 236          * We are going to work on this request.  Mark it as enqueued (though
 237          * we don't actually queue it...)
 238          */
 239         ccb_h->status |= CAM_SIM_QUEUED;
 240
 241         if((ccb_h->flags & CAM_DIR_MASK) != CAM_DIR_NONE) {
 242                 if(ccb_h->flags & CAM_DIR_IN)
 243                         req->flags |= TW_OSLI_REQ_FLAGS_DATA_IN;
 244                 else
 245                         req->flags |= TW_OSLI_REQ_FLAGS_DATA_OUT;
 246         }
 247
 248         /* Build the CL understood request packet for SCSI cmds. */
 249         req_pkt = &req->req_pkt;
 250         req_pkt->status = 0;
 251         req_pkt->tw_osl_callback = tw_osl_complete_io;
 252         scsi_req = &(req_pkt->gen_req_pkt.scsi_req);
 253         scsi_req->unit = ccb_h->target_id;
 254         scsi_req->lun = ccb_h->target_lun;
 255         scsi_req->sense_len = 0;
 256         scsi_req->sense_data = (TW_UINT8 *)(&csio->sense_data);
 257         scsi_req->scsi_status = 0;
 258         if(ccb_h->flags & CAM_CDB_POINTER)
 259                 scsi_req->cdb = csio->cdb_io.cdb_ptr;
 260         else
 261                 scsi_req->cdb = csio->cdb_io.cdb_bytes;
 262         scsi_req->cdb_len = csio->cdb_len;
 263
 264         if (csio->dxfer_len > TW_CL_MAX_IO_SIZE) {
 265                 tw_osli_printf(sc, "size = %d",
 266                         TW_CL_SEVERITY_ERROR_STRING,
 267                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 268                         0x2106,
 269                         "I/O size too big",
 270                         csio->dxfer_len);
 271                 ccb_h->status = CAM_REQ_TOO_BIG;
 272                 ccb_h->status &= ~CAM_SIM_QUEUED;
 273                 xpt_done(ccb);
 274                 return(1);
 275         }
 276         req->data = ccb;
 277         req->length = csio->dxfer_len;
 278         req->flags |= TW_OSLI_REQ_FLAGS_CCB;
 279         req->deadline = tw_osl_get_local_time() + (ccb_h->timeout / 1000);
 280
 281         /*
 282          * twa_map_load_data_callback will fill in the SGL,
 283          * and submit the I/O.
 284          */
 285         error = tw_osli_map_request(req);
 286         if ((error) && (req->flags & TW_OSLI_REQ_FLAGS_FAILED)) {
 287                 req->deadline = 0;
 288                 ccb_h->status = CAM_REQ_CMP_ERR;
 289                 ccb_h->status &= ~CAM_SIM_QUEUED;
 290                 xpt_done(ccb);
 291         }
 292         return(error);
 293 }
 294
 295
 296
 297 /*
 298  * Function name:       twa_action
 299  * Description:         Driver entry point for CAM's use.
 300  *
 301  * Input:               sim     -- sim corresponding to the ctlr
 302  *                      ccb     -- ptr to CAM request
 303  * Output:              None
 304  * Return value:        None
 305  */
 306 TW_VOID
 307 twa_action(struct cam_sim *sim, union ccb *ccb)
 308 {
 309         struct twa_softc        *sc = (struct twa_softc *)cam_sim_softc(sim);
 310         struct ccb_hdr          *ccb_h = &(ccb->ccb_h);
 311
 312         switch (ccb_h->func_code) {
 313         case XPT_SCSI_IO:       /* SCSI I/O */
 314         {
 315                 struct tw_osli_req_context      *req;
 316
 317                 req = tw_osli_get_request(sc);
 318                 if (req == NULL) {
 319                         tw_osli_dbg_dprintf(2, sc, "Cannot get request pkt.");
 320                         /*
 321                          * Freeze the simq to maintain ccb ordering.  The next
 322                          * ccb that gets completed will unfreeze the simq.
 323                          */
 324                         ccb_h->status &= ~CAM_SIM_QUEUED;
 325                         ccb_h->status |= CAM_REQUEUE_REQ;
 326                         xpt_done(ccb);
 327                         break;
 328                 }
 329
 330                 if ((tw_cl_is_reset_needed(&(req->ctlr->ctlr_handle)))) {
 331                         ccb_h->status &= ~CAM_SIM_QUEUED;
 332                         ccb_h->status |= CAM_REQUEUE_REQ;
 333                         xpt_done(ccb);
 334                         tw_osli_req_q_insert_tail(req, TW_OSLI_FREE_Q);
 335                         break;
 336                 }
 337
 338                 req->req_handle.osl_req_ctxt = req;
 339                 req->req_handle.is_io = TW_CL_TRUE;
 340                 req->orig_req = ccb;
 341                 if (tw_osli_execute_scsi(req, ccb))
 342                         tw_osli_req_q_insert_tail(req, TW_OSLI_FREE_Q);
 343                 break;
 344         }
 345
 346         case XPT_ABORT:
 347                 tw_osli_dbg_dprintf(2, sc, "Abort request.");
 348                 ccb_h->status = CAM_UA_ABORT;
 349                 xpt_done(ccb);
 350                 break;
 351
 352         case XPT_RESET_BUS:
 353                 tw_cl_create_event(&(sc->ctlr_handle), TW_CL_FALSE,
 354                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 355                         0x2108, 0x3, TW_CL_SEVERITY_INFO_STRING,
 356                         "Received Reset Bus request from CAM",
 357                         " ");
 358
 359                 tw_cl_set_reset_needed(&(sc->ctlr_handle));
 360                 ccb_h->status = CAM_REQ_CMP;
 361                 xpt_done(ccb);
 362                 break;
 363
 364         case XPT_SET_TRAN_SETTINGS:
 365                 tw_osli_dbg_dprintf(3, sc, "XPT_SET_TRAN_SETTINGS");
 366
 367                 /*
 368                  * This command is not supported, since it's very specific
 369                  * to SCSI, and we are doing ATA.
 370                  */
 371                 ccb_h->status = CAM_FUNC_NOTAVAIL;
 372                 xpt_done(ccb);
 373                 break;
 374
 375         case XPT_GET_TRAN_SETTINGS:
 376         {
 377                 struct ccb_trans_settings       *cts = &ccb->cts;
 378                 struct ccb_trans_settings_scsi *scsi =
 379                     &cts->proto_specific.scsi;
 380                 struct ccb_trans_settings_spi *spi =
 381                     &cts->xport_specific.spi;
 382
 383                 cts->protocol = PROTO_SCSI;
 384                 cts->protocol_version = SCSI_REV_2;
 385                 cts->transport = XPORT_SPI;
 386                 cts->transport_version = 2;
 387
 388                 spi->valid = CTS_SPI_VALID_DISC;
 389                 spi->flags = CTS_SPI_FLAGS_DISC_ENB;
 390                 scsi->valid = CTS_SCSI_VALID_TQ;
 391                 scsi->flags = CTS_SCSI_FLAGS_TAG_ENB;
 392                 tw_osli_dbg_dprintf(3, sc, "XPT_GET_TRAN_SETTINGS");
 393                 ccb_h->status = CAM_REQ_CMP;
 394                 xpt_done(ccb);
 395                 break;
 396         }
 397
 398         case XPT_CALC_GEOMETRY:
 399                 tw_osli_dbg_dprintf(3, sc, "XPT_CALC_GEOMETRY");
 400                 cam_calc_geometry(&ccb->ccg, 1/* extended */);
 401                 xpt_done(ccb);
 402                 break;
 403
 404         case XPT_PATH_INQ:    /* Path inquiry -- get twa properties */
 405         {
 406                 struct ccb_pathinq      *path_inq = &ccb->cpi;
 407
 408                 tw_osli_dbg_dprintf(3, sc, "XPT_PATH_INQ request");
 409
 410                 path_inq->version_num = 1;
 411                 path_inq->hba_inquiry = 0;
 412                 path_inq->target_sprt = 0;
 413                 path_inq->hba_misc = 0;
 414                 path_inq->hba_eng_cnt = 0;
 415                 path_inq->max_target = TW_CL_MAX_NUM_UNITS;
 416                 path_inq->max_lun = TW_CL_MAX_NUM_LUNS - 1;
 417                 path_inq->unit_number = cam_sim_unit(sim);
 418                 path_inq->bus_id = cam_sim_bus(sim);
 419                 path_inq->initiator_id = TW_CL_MAX_NUM_UNITS;
 420                 path_inq->base_transfer_speed = 100000;
 421                 strncpy(path_inq->sim_vid, "FreeBSD", SIM_IDLEN);
 422                 strncpy(path_inq->hba_vid, "3ware", HBA_IDLEN);
 423                 strncpy(path_inq->dev_name, cam_sim_name(sim), DEV_IDLEN);
 424                 path_inq->transport = XPORT_SPI;
 425                 path_inq->transport_version = 2;
 426                 path_inq->protocol = PROTO_SCSI;
 427                 path_inq->protocol_version = SCSI_REV_2;
 428                 path_inq->maxio = TW_CL_MAX_IO_SIZE;
 429                 ccb_h->status = CAM_REQ_CMP;
 430                 xpt_done(ccb);
 431                 break;
 432         }
 433
 434         default:
 435                 tw_osli_dbg_dprintf(3, sc, "func_code = %x", ccb_h->func_code);
 436                 ccb_h->status = CAM_REQ_INVALID;
 437                 xpt_done(ccb);
 438                 break;
 439         }
 440 }
 441
 442
 443
 444 /*
 445  * Function name:       twa_poll
 446  * Description:         Driver entry point called when interrupts are not
 447  *                      available.
 448  *
 449  * Input:               sim     -- sim corresponding to the controller
 450  * Output:              None
 451  * Return value:        None
 452  */
 453 TW_VOID
 454 twa_poll(struct cam_sim *sim)
 455 {
 456         struct twa_softc *sc = (struct twa_softc *)(cam_sim_softc(sim));
 457
 458         tw_osli_dbg_dprintf(3, sc, "entering; sc = %p", sc);
 459         tw_cl_interrupt(&(sc->ctlr_handle));
 460         tw_osli_dbg_dprintf(3, sc, "exiting; sc = %p", sc);
 461 }
 462
 463
 464
 465 /*
 466  * Function name:       tw_osli_request_bus_scan
 467  * Description:         Requests CAM for a scan of the bus.
 468  *
 469  * Input:               sc      -- ptr to per ctlr structure
 470  * Output:              None
 471  * Return value:        0       -- success
 472  *                      non-zero-- failure
 473  */
 474 TW_INT32
 475 tw_osli_request_bus_scan(struct twa_softc *sc)
 476 {
 477         union ccb       *ccb;
 478
 479         tw_osli_dbg_dprintf(3, sc, "entering");
 480
 481         /* If we get here before sc->sim is initialized, return an error. */
 482         if (!(sc->sim))
 483                 return(ENXIO);
 484         if ((ccb = xpt_alloc_ccb()) == NULL)
 485                 return(ENOMEM);
 486         mtx_lock(sc->sim_lock);
 487         if (xpt_create_path(&ccb->ccb_h.path, xpt_periph, cam_sim_path(sc->sim),
 488             CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
 489                 xpt_free_ccb(ccb);
 490                 mtx_unlock(sc->sim_lock);
 491                 return(EIO);
 492         }
 493
 494         xpt_rescan(ccb);
 495         mtx_unlock(sc->sim_lock);
 496         return(0);
 497 }
 498
 499
 500
 501 /*
 502  * Function name:       tw_osli_disallow_new_requests
 503  * Description:         Calls the appropriate CAM function, so as to freeze
 504  *                      the flow of new requests from CAM to this controller.
 505  *
 506  * Input:               sc      -- ptr to OSL internal ctlr context
 507  *                      req_handle -- ptr to request handle sent by OSL.
 508  * Output:              None
 509  * Return value:        None
 510  */
 511 TW_VOID
 512 tw_osli_disallow_new_requests(struct twa_softc *sc,
 513         struct tw_cl_req_handle *req_handle)
 514 {
 515         /* Only freeze/release the simq for IOs */
 516         if (req_handle->is_io) {
 517                 struct tw_osli_req_context      *req = req_handle->osl_req_ctxt;
 518                 union ccb                       *ccb = (union ccb *)(req->orig_req);
 519
 520                 xpt_freeze_simq(sc->sim, 1);
 521                 ccb->ccb_h.status |= CAM_RELEASE_SIMQ;
 522         }
 523 }
 524
 525
 526
 527 /*
 528  * Function name:       tw_osl_timeout
 529  * Description:         Call to timeout().
 530  *
 531  * Input:               req_handle -- ptr to request handle sent by OSL.
 532  * Output:              None
 533  * Return value:        None
 534  */
 535 TW_VOID
 536 tw_osl_timeout(struct tw_cl_req_handle *req_handle)
 537 {
 538         struct tw_osli_req_context      *req = req_handle->osl_req_ctxt;
 539         union ccb                       *ccb = (union ccb *)(req->orig_req);
 540         struct ccb_hdr                  *ccb_h = &(ccb->ccb_h);
 541
 542         req->deadline = tw_osl_get_local_time() + (ccb_h->timeout / 1000);
 543 }
 544
 545
 546
 547 /*
 548  * Function name:       tw_osl_untimeout
 549  * Description:         Inverse of call to timeout().
 550  *
 551  * Input:               req_handle -- ptr to request handle sent by OSL.
 552  * Output:              None
 553  * Return value:        None
 554  */
 555 TW_VOID
 556 tw_osl_untimeout(struct tw_cl_req_handle *req_handle)
 557 {
 558         struct tw_osli_req_context      *req = req_handle->osl_req_ctxt;
 559
 560         req->deadline = 0;
 561 }
 562
 563
 564
 565 /*
 566  * Function name:       tw_osl_scan_bus
 567  * Description:         CL calls this function to request for a bus scan.
 568  *
 569  * Input:               ctlr_handle     -- ptr to controller handle
 570  * Output:              None
 571  * Return value:        None
 572  */
 573 TW_VOID
 574 tw_osl_scan_bus(struct tw_cl_ctlr_handle *ctlr_handle)
 575 {
 576         struct twa_softc        *sc = ctlr_handle->osl_ctlr_ctxt;
 577         TW_INT32                error;
 578
 579         if ((error = tw_osli_request_bus_scan(sc)))
 580                 tw_osli_printf(sc, "error = %d",
 581                         TW_CL_SEVERITY_ERROR_STRING,
 582                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 583                         0x2109,
 584                         "Bus scan request to CAM failed",
 585                         error);
 586 }
 587
 588
 589
 590 /*
 591  * Function name:       tw_osl_complete_io
 592  * Description:         Called to complete CAM scsi requests.
 593  *
 594  * Input:               req_handle      -- ptr to request handle
 595  * Output:              None
 596  * Return value:        None
 597  */
 598 TW_VOID
 599 tw_osl_complete_io(struct tw_cl_req_handle *req_handle)
 600 {
 601         struct tw_osli_req_context      *req = req_handle->osl_req_ctxt;
 602         struct tw_cl_req_packet         *req_pkt =
 603                 (struct tw_cl_req_packet *)(&req->req_pkt);
 604         struct tw_cl_scsi_req_packet    *scsi_req;
 605         struct twa_softc                *sc = req->ctlr;
 606         union ccb                       *ccb = (union ccb *)(req->orig_req);
 607
 608         tw_osli_dbg_dprintf(10, sc, "entering");
 609
 610         if (req->state != TW_OSLI_REQ_STATE_BUSY)
 611                 tw_osli_printf(sc, "request = %p, status = %d",
 612                         TW_CL_SEVERITY_ERROR_STRING,
 613                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 614                         0x210A,
 615                         "Unposted command completed!!",
 616                         req, req->state);
 617
 618         /*
 619          * Remove request from the busy queue.  Just mark it complete.
 620          * There's no need to move it into the complete queue as we are
 621          * going to be done with it right now.
 622          */
 623         req->state = TW_OSLI_REQ_STATE_COMPLETE;
 624         tw_osli_req_q_remove_item(req, TW_OSLI_BUSY_Q);
 625
 626         tw_osli_unmap_request(req);
 627
 628         req->deadline = 0;
 629         if (req->error_code) {
 630                 /* This request never got submitted to the firmware. */
 631                 if (req->error_code == EBUSY) {
 632                         /*
 633                          * Cmd queue is full, or the Common Layer is out of
 634                          * resources.  The simq will already have been frozen.
 635                          * When this ccb gets completed will unfreeze the simq.
 636                          */
 637                         ccb->ccb_h.status |= CAM_REQUEUE_REQ;
 638                 }
 639                 else if (req->error_code == EFBIG)
 640                         ccb->ccb_h.status = CAM_REQ_TOO_BIG;
 641                 else
 642                         ccb->ccb_h.status = CAM_REQ_CMP_ERR;
 643         } else {
 644                 scsi_req = &(req_pkt->gen_req_pkt.scsi_req);
 645                 if (req_pkt->status == TW_CL_ERR_REQ_SUCCESS)
 646                         ccb->ccb_h.status = CAM_REQ_CMP;
 647                 else {
 648                         if (req_pkt->status & TW_CL_ERR_REQ_INVALID_TARGET)
 649                                 ccb->ccb_h.status |= CAM_SEL_TIMEOUT;
 650                         else if (req_pkt->status & TW_CL_ERR_REQ_INVALID_LUN)
 651                                 ccb->ccb_h.status |= CAM_DEV_NOT_THERE;
 652                         else if (req_pkt->status & TW_CL_ERR_REQ_SCSI_ERROR)
 653                                 ccb->ccb_h.status |= CAM_SCSI_STATUS_ERROR;
 654                         else if (req_pkt->status & TW_CL_ERR_REQ_BUS_RESET)
 655                                 ccb->ccb_h.status |= (CAM_REQUEUE_REQ | CAM_SCSI_BUS_RESET);
 656                         /*
 657                          * If none of the above errors occurred, simply
 658                          * mark completion error.
 659                          */
 660                         if (ccb->ccb_h.status == 0)
 661                                 ccb->ccb_h.status = CAM_REQ_CMP_ERR;
 662
 663                         if (req_pkt->status & TW_CL_ERR_REQ_AUTO_SENSE_VALID) {
 664                                 ccb->csio.sense_len = scsi_req->sense_len;
 665                                 ccb->ccb_h.status |= CAM_AUTOSNS_VALID;
 666                         }
 667                 }
 668
 669                 ccb->csio.scsi_status = scsi_req->scsi_status;
 670         }
 671
 672         ccb->ccb_h.status &= ~CAM_SIM_QUEUED;
 673         mtx_lock(sc->sim_lock);
 674         xpt_done(ccb);
 675         mtx_unlock(sc->sim_lock);
 676         if (! req->error_code)
 677                  /* twa_action will free the request otherwise */
 678                 tw_osli_req_q_insert_tail(req, TW_OSLI_FREE_Q);
 679 }
 680