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 %jx",
 211                         ccb_h->path_id, ccb_h->target_id,
 212                         (uintmax_t)ccb_h->target_lun);
 213                 ccb_h->status |= CAM_TID_INVALID;
 214                 xpt_done(ccb);
 215                 return(1);
 216         }
 217         if (ccb_h->target_lun >= TW_CL_MAX_NUM_LUNS) {
 218                 tw_osli_dbg_dprintf(3, sc, "Invalid lun. PTL = %x %x %jx",
 219                         ccb_h->path_id, ccb_h->target_id,
 220                         (uintmax_t)ccb_h->target_lun);
 221                 ccb_h->status |= CAM_LUN_INVALID;
 222                 xpt_done(ccb);
 223                 return(1);
 224         }
 225
 226         if(ccb_h->flags & CAM_CDB_PHYS) {
 227                 tw_osli_printf(sc, "",
 228                         TW_CL_SEVERITY_ERROR_STRING,
 229                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 230                         0x2105,
 231                         "Physical CDB address!");
 232                 ccb_h->status = CAM_REQ_INVALID;
 233                 xpt_done(ccb);
 234                 return(1);
 235         }
 236
 237         /*
 238          * We are going to work on this request.  Mark it as enqueued (though
 239          * we don't actually queue it...)
 240          */
 241         ccb_h->status |= CAM_SIM_QUEUED;
 242
 243         if((ccb_h->flags & CAM_DIR_MASK) != CAM_DIR_NONE) {
 244                 if(ccb_h->flags & CAM_DIR_IN)
 245                         req->flags |= TW_OSLI_REQ_FLAGS_DATA_IN;
 246                 else
 247                         req->flags |= TW_OSLI_REQ_FLAGS_DATA_OUT;
 248         }
 249
 250         /* Build the CL understood request packet for SCSI cmds. */
 251         req_pkt = &req->req_pkt;
 252         req_pkt->status = 0;
 253         req_pkt->tw_osl_callback = tw_osl_complete_io;
 254         scsi_req = &(req_pkt->gen_req_pkt.scsi_req);
 255         scsi_req->unit = ccb_h->target_id;
 256         scsi_req->lun = ccb_h->target_lun;
 257         scsi_req->sense_len = 0;
 258         scsi_req->sense_data = (TW_UINT8 *)(&csio->sense_data);
 259         scsi_req->scsi_status = 0;
 260         if(ccb_h->flags & CAM_CDB_POINTER)
 261                 scsi_req->cdb = csio->cdb_io.cdb_ptr;
 262         else
 263                 scsi_req->cdb = csio->cdb_io.cdb_bytes;
 264         scsi_req->cdb_len = csio->cdb_len;
 265
 266         if (csio->dxfer_len > TW_CL_MAX_IO_SIZE) {
 267                 tw_osli_printf(sc, "size = %d",
 268                         TW_CL_SEVERITY_ERROR_STRING,
 269                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 270                         0x2106,
 271                         "I/O size too big",
 272                         csio->dxfer_len);
 273                 ccb_h->status = CAM_REQ_TOO_BIG;
 274                 ccb_h->status &= ~CAM_SIM_QUEUED;
 275                 xpt_done(ccb);
 276                 return(1);
 277         }
 278         if ((ccb_h->flags & CAM_DATA_MASK) == CAM_DATA_VADDR) {
 279                 if ((req->length = csio->dxfer_len) != 0) {
 280                         req->data = csio->data_ptr;
 281                         scsi_req->sgl_entries = 1;
 282                 }
 283         } else
 284                 req->flags |= TW_OSLI_REQ_FLAGS_CCB;
 285         req->deadline = tw_osl_get_local_time() + (ccb_h->timeout / 1000);
 286
 287         /*
 288          * twa_map_load_data_callback will fill in the SGL,
 289          * and submit the I/O.
 290          */
 291         error = tw_osli_map_request(req);
 292         if ((error) && (req->flags & TW_OSLI_REQ_FLAGS_FAILED)) {
 293                 req->deadline = 0;
 294                 ccb_h->status = CAM_REQ_CMP_ERR;
 295                 ccb_h->status &= ~CAM_SIM_QUEUED;
 296                 xpt_done(ccb);
 297         }
 298         return(error);
 299 }
 300
 301
 302
 303 /*
 304  * Function name:       twa_action
 305  * Description:         Driver entry point for CAM's use.
 306  *
 307  * Input:               sim     -- sim corresponding to the ctlr
 308  *                      ccb     -- ptr to CAM request
 309  * Output:              None
 310  * Return value:        None
 311  */
 312 TW_VOID
 313 twa_action(struct cam_sim *sim, union ccb *ccb)
 314 {
 315         struct twa_softc        *sc = (struct twa_softc *)cam_sim_softc(sim);
 316         struct ccb_hdr          *ccb_h = &(ccb->ccb_h);
 317
 318         switch (ccb_h->func_code) {
 319         case XPT_SCSI_IO:       /* SCSI I/O */
 320         {
 321                 struct tw_osli_req_context      *req;
 322
 323                 req = tw_osli_get_request(sc);
 324                 if (req == NULL) {
 325                         tw_osli_dbg_dprintf(2, sc, "Cannot get request pkt.");
 326                         /*
 327                          * Freeze the simq to maintain ccb ordering.  The next
 328                          * ccb that gets completed will unfreeze the simq.
 329                          */
 330                         ccb_h->status &= ~CAM_SIM_QUEUED;
 331                         ccb_h->status |= CAM_REQUEUE_REQ;
 332                         xpt_done(ccb);
 333                         break;
 334                 }
 335
 336                 if ((tw_cl_is_reset_needed(&(req->ctlr->ctlr_handle)))) {
 337                         ccb_h->status &= ~CAM_SIM_QUEUED;
 338                         ccb_h->status |= CAM_REQUEUE_REQ;
 339                         xpt_done(ccb);
 340                         tw_osli_req_q_insert_tail(req, TW_OSLI_FREE_Q);
 341                         break;
 342                 }
 343
 344                 req->req_handle.osl_req_ctxt = req;
 345                 req->req_handle.is_io = TW_CL_TRUE;
 346                 req->orig_req = ccb;
 347                 if (tw_osli_execute_scsi(req, ccb))
 348                         tw_osli_req_q_insert_tail(req, TW_OSLI_FREE_Q);
 349                 break;
 350         }
 351
 352         case XPT_ABORT:
 353                 tw_osli_dbg_dprintf(2, sc, "Abort request.");
 354                 ccb_h->status = CAM_UA_ABORT;
 355                 xpt_done(ccb);
 356                 break;
 357
 358         case XPT_RESET_BUS:
 359                 tw_cl_create_event(&(sc->ctlr_handle), TW_CL_FALSE,
 360                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 361                         0x2108, 0x3, TW_CL_SEVERITY_INFO_STRING,
 362                         "Received Reset Bus request from CAM",
 363                         " ");
 364
 365                 tw_cl_set_reset_needed(&(sc->ctlr_handle));
 366                 ccb_h->status = CAM_REQ_CMP;
 367                 xpt_done(ccb);
 368                 break;
 369
 370         case XPT_SET_TRAN_SETTINGS:
 371                 tw_osli_dbg_dprintf(3, sc, "XPT_SET_TRAN_SETTINGS");
 372
 373                 /*
 374                  * This command is not supported, since it's very specific
 375                  * to SCSI, and we are doing ATA.
 376                  */
 377                 ccb_h->status = CAM_FUNC_NOTAVAIL;
 378                 xpt_done(ccb);
 379                 break;
 380
 381         case XPT_GET_TRAN_SETTINGS:
 382         {
 383                 struct ccb_trans_settings       *cts = &ccb->cts;
 384                 struct ccb_trans_settings_scsi *scsi =
 385                     &cts->proto_specific.scsi;
 386                 struct ccb_trans_settings_spi *spi =
 387                     &cts->xport_specific.spi;
 388
 389                 cts->protocol = PROTO_SCSI;
 390                 cts->protocol_version = SCSI_REV_2;
 391                 cts->transport = XPORT_SPI;
 392                 cts->transport_version = 2;
 393
 394                 spi->valid = CTS_SPI_VALID_DISC;
 395                 spi->flags = CTS_SPI_FLAGS_DISC_ENB;
 396                 scsi->valid = CTS_SCSI_VALID_TQ;
 397                 scsi->flags = CTS_SCSI_FLAGS_TAG_ENB;
 398                 tw_osli_dbg_dprintf(3, sc, "XPT_GET_TRAN_SETTINGS");
 399                 ccb_h->status = CAM_REQ_CMP;
 400                 xpt_done(ccb);
 401                 break;
 402         }
 403
 404         case XPT_CALC_GEOMETRY:
 405                 tw_osli_dbg_dprintf(3, sc, "XPT_CALC_GEOMETRY");
 406                 cam_calc_geometry(&ccb->ccg, 1/* extended */);
 407                 xpt_done(ccb);
 408                 break;
 409
 410         case XPT_PATH_INQ:    /* Path inquiry -- get twa properties */
 411         {
 412                 struct ccb_pathinq      *path_inq = &ccb->cpi;
 413
 414                 tw_osli_dbg_dprintf(3, sc, "XPT_PATH_INQ request");
 415
 416                 path_inq->version_num = 1;
 417                 path_inq->hba_inquiry = 0;
 418                 path_inq->target_sprt = 0;
 419                 path_inq->hba_misc = 0;
 420                 path_inq->hba_eng_cnt = 0;
 421                 path_inq->max_target = TW_CL_MAX_NUM_UNITS;
 422                 path_inq->max_lun = TW_CL_MAX_NUM_LUNS - 1;
 423                 path_inq->unit_number = cam_sim_unit(sim);
 424                 path_inq->bus_id = cam_sim_bus(sim);
 425                 path_inq->initiator_id = TW_CL_MAX_NUM_UNITS;
 426                 path_inq->base_transfer_speed = 100000;
 427                 strlcpy(path_inq->sim_vid, "FreeBSD", SIM_IDLEN);
 428                 strlcpy(path_inq->hba_vid, "3ware", HBA_IDLEN);
 429                 strlcpy(path_inq->dev_name, cam_sim_name(sim), DEV_IDLEN);
 430                 path_inq->transport = XPORT_SPI;
 431                 path_inq->transport_version = 2;
 432                 path_inq->protocol = PROTO_SCSI;
 433                 path_inq->protocol_version = SCSI_REV_2;
 434                 path_inq->maxio = TW_CL_MAX_IO_SIZE;
 435                 ccb_h->status = CAM_REQ_CMP;
 436                 xpt_done(ccb);
 437                 break;
 438         }
 439
 440         default:
 441                 tw_osli_dbg_dprintf(3, sc, "func_code = %x", ccb_h->func_code);
 442                 ccb_h->status = CAM_REQ_INVALID;
 443                 xpt_done(ccb);
 444                 break;
 445         }
 446 }
 447
 448
 449
 450 /*
 451  * Function name:       twa_poll
 452  * Description:         Driver entry point called when interrupts are not
 453  *                      available.
 454  *
 455  * Input:               sim     -- sim corresponding to the controller
 456  * Output:              None
 457  * Return value:        None
 458  */
 459 TW_VOID
 460 twa_poll(struct cam_sim *sim)
 461 {
 462         struct twa_softc *sc = (struct twa_softc *)(cam_sim_softc(sim));
 463
 464         tw_osli_dbg_dprintf(3, sc, "entering; sc = %p", sc);
 465         tw_cl_interrupt(&(sc->ctlr_handle));
 466         tw_osli_dbg_dprintf(3, sc, "exiting; sc = %p", sc);
 467 }
 468
 469
 470
 471 /*
 472  * Function name:       tw_osli_request_bus_scan
 473  * Description:         Requests CAM for a scan of the bus.
 474  *
 475  * Input:               sc      -- ptr to per ctlr structure
 476  * Output:              None
 477  * Return value:        0       -- success
 478  *                      non-zero-- failure
 479  */
 480 TW_INT32
 481 tw_osli_request_bus_scan(struct twa_softc *sc)
 482 {
 483         union ccb       *ccb;
 484
 485         tw_osli_dbg_dprintf(3, sc, "entering");
 486
 487         /* If we get here before sc->sim is initialized, return an error. */
 488         if (!(sc->sim))
 489                 return(ENXIO);
 490         if ((ccb = xpt_alloc_ccb()) == NULL)
 491                 return(ENOMEM);
 492         mtx_lock(sc->sim_lock);
 493         if (xpt_create_path(&ccb->ccb_h.path, NULL, cam_sim_path(sc->sim),
 494             CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
 495                 xpt_free_ccb(ccb);
 496                 mtx_unlock(sc->sim_lock);
 497                 return(EIO);
 498         }
 499
 500         xpt_rescan(ccb);
 501         mtx_unlock(sc->sim_lock);
 502         return(0);
 503 }
 504
 505
 506
 507 /*
 508  * Function name:       tw_osli_disallow_new_requests
 509  * Description:         Calls the appropriate CAM function, so as to freeze
 510  *                      the flow of new requests from CAM to this controller.
 511  *
 512  * Input:               sc      -- ptr to OSL internal ctlr context
 513  *                      req_handle -- ptr to request handle sent by OSL.
 514  * Output:              None
 515  * Return value:        None
 516  */
 517 TW_VOID
 518 tw_osli_disallow_new_requests(struct twa_softc *sc,
 519         struct tw_cl_req_handle *req_handle)
 520 {
 521         /* Only freeze/release the simq for IOs */
 522         if (req_handle->is_io) {
 523                 struct tw_osli_req_context      *req = req_handle->osl_req_ctxt;
 524                 union ccb                       *ccb = (union ccb *)(req->orig_req);
 525
 526                 xpt_freeze_simq(sc->sim, 1);
 527                 ccb->ccb_h.status |= CAM_RELEASE_SIMQ;
 528         }
 529 }
 530
 531
 532
 533 /*
 534  * Function name:       tw_osl_timeout
 535  * Description:         Call to timeout().
 536  *
 537  * Input:               req_handle -- ptr to request handle sent by OSL.
 538  * Output:              None
 539  * Return value:        None
 540  */
 541 TW_VOID
 542 tw_osl_timeout(struct tw_cl_req_handle *req_handle)
 543 {
 544         struct tw_osli_req_context      *req = req_handle->osl_req_ctxt;
 545         union ccb                       *ccb = (union ccb *)(req->orig_req);
 546         struct ccb_hdr                  *ccb_h = &(ccb->ccb_h);
 547
 548         req->deadline = tw_osl_get_local_time() + (ccb_h->timeout / 1000);
 549 }
 550
 551
 552
 553 /*
 554  * Function name:       tw_osl_untimeout
 555  * Description:         Inverse of call to timeout().
 556  *
 557  * Input:               req_handle -- ptr to request handle sent by OSL.
 558  * Output:              None
 559  * Return value:        None
 560  */
 561 TW_VOID
 562 tw_osl_untimeout(struct tw_cl_req_handle *req_handle)
 563 {
 564         struct tw_osli_req_context      *req = req_handle->osl_req_ctxt;
 565
 566         req->deadline = 0;
 567 }
 568
 569
 570
 571 /*
 572  * Function name:       tw_osl_scan_bus
 573  * Description:         CL calls this function to request for a bus scan.
 574  *
 575  * Input:               ctlr_handle     -- ptr to controller handle
 576  * Output:              None
 577  * Return value:        None
 578  */
 579 TW_VOID
 580 tw_osl_scan_bus(struct tw_cl_ctlr_handle *ctlr_handle)
 581 {
 582         struct twa_softc        *sc = ctlr_handle->osl_ctlr_ctxt;
 583         TW_INT32                error;
 584
 585         if ((error = tw_osli_request_bus_scan(sc)))
 586                 tw_osli_printf(sc, "error = %d",
 587                         TW_CL_SEVERITY_ERROR_STRING,
 588                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 589                         0x2109,
 590                         "Bus scan request to CAM failed",
 591                         error);
 592 }
 593
 594
 595
 596 /*
 597  * Function name:       tw_osl_complete_io
 598  * Description:         Called to complete CAM scsi requests.
 599  *
 600  * Input:               req_handle      -- ptr to request handle
 601  * Output:              None
 602  * Return value:        None
 603  */
 604 TW_VOID
 605 tw_osl_complete_io(struct tw_cl_req_handle *req_handle)
 606 {
 607         struct tw_osli_req_context      *req = req_handle->osl_req_ctxt;
 608         struct tw_cl_req_packet         *req_pkt =
 609                 (struct tw_cl_req_packet *)(&req->req_pkt);
 610         struct tw_cl_scsi_req_packet    *scsi_req;
 611         struct twa_softc                *sc = req->ctlr;
 612         union ccb                       *ccb = (union ccb *)(req->orig_req);
 613
 614         tw_osli_dbg_dprintf(10, sc, "entering");
 615
 616         if (req->state != TW_OSLI_REQ_STATE_BUSY)
 617                 tw_osli_printf(sc, "request = %p, status = %d",
 618                         TW_CL_SEVERITY_ERROR_STRING,
 619                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 620                         0x210A,
 621                         "Unposted command completed!!",
 622                         req, req->state);
 623
 624         /*
 625          * Remove request from the busy queue.  Just mark it complete.
 626          * There's no need to move it into the complete queue as we are
 627          * going to be done with it right now.
 628          */
 629         req->state = TW_OSLI_REQ_STATE_COMPLETE;
 630         tw_osli_req_q_remove_item(req, TW_OSLI_BUSY_Q);
 631
 632         tw_osli_unmap_request(req);
 633
 634         req->deadline = 0;
 635         if (req->error_code) {
 636                 /* This request never got submitted to the firmware. */
 637                 if (req->error_code == EBUSY) {
 638                         /*
 639                          * Cmd queue is full, or the Common Layer is out of
 640                          * resources.  The simq will already have been frozen.
 641                          * When this ccb gets completed will unfreeze the simq.
 642                          */
 643                         ccb->ccb_h.status |= CAM_REQUEUE_REQ;
 644                 }
 645                 else if (req->error_code == EFBIG)
 646                         ccb->ccb_h.status = CAM_REQ_TOO_BIG;
 647                 else
 648                         ccb->ccb_h.status = CAM_REQ_CMP_ERR;
 649         } else {
 650                 scsi_req = &(req_pkt->gen_req_pkt.scsi_req);
 651                 if (req_pkt->status == TW_CL_ERR_REQ_SUCCESS)
 652                         ccb->ccb_h.status = CAM_REQ_CMP;
 653                 else {
 654                         if (req_pkt->status & TW_CL_ERR_REQ_INVALID_TARGET)
 655                                 ccb->ccb_h.status |= CAM_SEL_TIMEOUT;
 656                         else if (req_pkt->status & TW_CL_ERR_REQ_INVALID_LUN)
 657                                 ccb->ccb_h.status |= CAM_DEV_NOT_THERE;
 658                         else if (req_pkt->status & TW_CL_ERR_REQ_SCSI_ERROR)
 659                                 ccb->ccb_h.status |= CAM_SCSI_STATUS_ERROR;
 660                         else if (req_pkt->status & TW_CL_ERR_REQ_BUS_RESET)
 661                                 ccb->ccb_h.status |= (CAM_REQUEUE_REQ | CAM_SCSI_BUS_RESET);
 662                         /*
 663                          * If none of the above errors occurred, simply
 664                          * mark completion error.
 665                          */
 666                         if (ccb->ccb_h.status == 0)
 667                                 ccb->ccb_h.status = CAM_REQ_CMP_ERR;
 668
 669                         if (req_pkt->status & TW_CL_ERR_REQ_AUTO_SENSE_VALID) {
 670                                 ccb->csio.sense_len = scsi_req->sense_len;
 671                                 ccb->ccb_h.status |= CAM_AUTOSNS_VALID;
 672                         }
 673                 }
 674
 675                 ccb->csio.scsi_status = scsi_req->scsi_status;
 676         }
 677
 678         ccb->ccb_h.status &= ~CAM_SIM_QUEUED;
 679         mtx_lock(sc->sim_lock);
 680         xpt_done(ccb);
 681         mtx_unlock(sc->sim_lock);
 682         if (! req->error_code)
 683                  /* twa_action will free the request otherwise */
 684                 tw_osli_req_q_insert_tail(req, TW_OSLI_FREE_Q);
 685 }
 686