sys/dev/raid/amr/amr_cam.c

   1 /*-
   2  * Copyright (c) 2000 Michael Smith
   3  * Copyright (c) 2000 BSDi
   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 /*-
  28  * Copyright (c) 2002 Eric Moore
  29  * Copyright (c) 2002 LSI Logic Corporation
  30  * All rights reserved.
  31  *
  32  * Redistribution and use in source and binary forms, with or without
  33  * modification, are permitted provided that the following conditions
  34  * are met:
  35  * 1. Redistributions of source code must retain the above copyright
  36  *      notice, this list of conditions and the following disclaimer.
  37  * 2. Redistributions in binary form must reproduce the above copyright
  38  *      notice, this list of conditions and the following disclaimer in the
  39  *      documentation and/or other materials provided with the distribution.
  40  * 3. The party using or redistributing the source code and binary forms
  41  *      agrees to the disclaimer below and the terms and conditions set forth
  42  *      herein.
  43  *
  44  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  45  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  46  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  47  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  48  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  49  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  50  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  51  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  52  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  53  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  54  * SUCH DAMAGE.
  55  *
  56  * $FreeBSD: src/sys/dev/amr/amr_cam.c,v 1.28 2008/11/03 00:53:54 scottl Exp $
  57  */
  58
  59 #include <sys/param.h>
  60 #include <sys/systm.h>
  61 #include <sys/malloc.h>
  62 #include <sys/kernel.h>
  63 #include <sys/module.h>
  64
  65 #include <sys/bio.h>
  66 #include <sys/bus.h>
  67 #include <sys/conf.h>
  68 #include <sys/stat.h>
  69
  70 #include <bus/cam/cam.h>
  71 #include <bus/cam/cam_ccb.h>
  72 #include <bus/cam/cam_sim.h>
  73 #include <bus/cam/cam_xpt.h>
  74 #include <bus/cam/cam_xpt_sim.h>
  75 #include <bus/cam/cam_debug.h>
  76 #include <bus/cam/scsi/scsi_all.h>
  77 #include <bus/cam/scsi/scsi_message.h>
  78
  79 #include <dev/raid/amr/amrreg.h>
  80 #include <dev/raid/amr/amrvar.h>
  81
  82 static int      amr_cam_probe(device_t dev);
  83 static int      amr_cam_attach(device_t dev);
  84 static int      amr_cam_detach(device_t dev);
  85 static void     amr_cam_action(struct cam_sim *sim, union ccb *ccb);
  86 static void     amr_cam_poll(struct cam_sim *sim);
  87 static void     amr_cam_complete(struct amr_command *ac);
  88 static int      amr_cam_command(struct amr_softc *sc, struct amr_command **acp);
  89
  90 static devclass_t       amr_pass_devclass;
  91
  92 static device_method_t  amr_pass_methods[] = {
  93         DEVMETHOD(device_probe,         amr_cam_probe),
  94         DEVMETHOD(device_attach,        amr_cam_attach),
  95         DEVMETHOD(device_detach,        amr_cam_detach),
  96         { 0, 0 }
  97 };
  98
  99 static driver_t amr_pass_driver = {
 100         "amrp",
 101         amr_pass_methods,
 102         0
 103 };
 104
 105 DRIVER_MODULE(amrp, amr, amr_pass_driver, amr_pass_devclass, 0, 0);
 106 MODULE_DEPEND(amrp, cam, 1, 1, 1);
 107
 108 MALLOC_DEFINE(M_AMRCAM, "amrcam", "AMR CAM memory");
 109
 110 /***********************************************************************
 111  * Enqueue/dequeue functions
 112  */
 113 static __inline void
 114 amr_enqueue_ccb(struct amr_softc *sc, union ccb *ccb)
 115 {
 116
 117         TAILQ_INSERT_TAIL(&sc->amr_cam_ccbq, &ccb->ccb_h, sim_links.tqe);
 118 }
 119
 120 static __inline void
 121 amr_requeue_ccb(struct amr_softc *sc, union ccb *ccb)
 122 {
 123
 124         TAILQ_INSERT_HEAD(&sc->amr_cam_ccbq, &ccb->ccb_h, sim_links.tqe);
 125 }
 126
 127 static __inline union ccb *
 128 amr_dequeue_ccb(struct amr_softc *sc)
 129 {
 130         union ccb       *ccb;
 131
 132         if ((ccb = (union ccb *)TAILQ_FIRST(&sc->amr_cam_ccbq)) != NULL)
 133                 TAILQ_REMOVE(&sc->amr_cam_ccbq, &ccb->ccb_h, sim_links.tqe);
 134         return(ccb);
 135 }
 136
 137 static int
 138 amr_cam_probe(device_t dev)
 139 {
 140         return (0);
 141 }
 142
 143 /********************************************************************************
 144  * Attach our 'real' SCSI channels to CAM
 145  */
 146 static int
 147 amr_cam_attach(device_t dev)
 148 {
 149         struct amr_softc *sc;
 150         struct cam_devq *devq;
 151         int chn, error;
 152
 153         sc = device_get_softc(dev);
 154
 155         /* initialise the ccb queue */
 156         TAILQ_INIT(&sc->amr_cam_ccbq);
 157
 158         /*
 159          * Allocate a devq for all our channels combined.  This should
 160          * allow for the maximum number of SCSI commands we will accept
 161          * at one time. Save the pointer in the softc so we can find it later
 162          * during detach.
 163          */
 164         if ((devq = cam_simq_alloc(AMR_MAX_SCSI_CMDS)) == NULL)
 165                 return(ENOMEM);
 166         sc->amr_cam_devq = devq;
 167
 168         /*
 169          * Iterate over our channels, registering them with CAM
 170          */
 171         for (chn = 0; chn < sc->amr_maxchan; chn++) {
 172
 173                 /* allocate a sim */
 174                 if ((sc->amr_cam_sim[chn] = cam_sim_alloc(amr_cam_action,
 175                     amr_cam_poll, "amr", sc, device_get_unit(sc->amr_dev),
 176                     &sc->amr_list_lock, 1, AMR_MAX_SCSI_CMDS, devq)) == NULL) {
 177                         device_printf(sc->amr_dev, "CAM SIM attach failed\n");
 178                         return(ENOMEM);
 179                 }
 180
 181                 /* register the bus ID so we can get it later */
 182                 lockmgr(&sc->amr_list_lock, LK_EXCLUSIVE);
 183                 error = xpt_bus_register(sc->amr_cam_sim[chn], chn);
 184                 lockmgr(&sc->amr_list_lock, LK_RELEASE);
 185                 if (error) {
 186                         device_printf(sc->amr_dev,
 187                             "CAM XPT bus registration failed\n");
 188                         return(ENXIO);
 189                 }
 190         }
 191         /*
 192          * XXX we should scan the config and work out which devices are
 193          * actually protected.
 194          */
 195         sc->amr_cam_command = amr_cam_command;
 196         return(0);
 197 }
 198
 199 /********************************************************************************
 200  * Disconnect ourselves from CAM
 201  */
 202 static int
 203 amr_cam_detach(device_t dev)
 204 {
 205         struct amr_softc *sc;
 206         int             chn;
 207
 208         sc = device_get_softc(dev);
 209         lockmgr(&sc->amr_list_lock, LK_EXCLUSIVE);
 210         for (chn = 0; chn < sc->amr_maxchan; chn++) {
 211                 /*
 212                  * If a sim was allocated for this channel, free it
 213                  */
 214                 if (sc->amr_cam_sim[chn] != NULL) {
 215                         xpt_bus_deregister(cam_sim_path(sc->amr_cam_sim[chn]));
 216                         cam_sim_free(sc->amr_cam_sim[chn]);
 217                 }
 218         }
 219         lockmgr(&sc->amr_list_lock, LK_RELEASE);
 220
 221         return (0);
 222 }
 223
 224 /***********************************************************************
 225  ***********************************************************************
 226                         CAM passthrough interface
 227  ***********************************************************************
 228  ***********************************************************************/
 229
 230 /***********************************************************************
 231  * Handle a request for action from CAM
 232  */
 233 static void
 234 amr_cam_action(struct cam_sim *sim, union ccb *ccb)
 235 {
 236         struct amr_softc        *sc = cam_sim_softc(sim);
 237
 238         switch(ccb->ccb_h.func_code) {
 239
 240         /*
 241          * Perform SCSI I/O to a physical device.
 242          */
 243         case XPT_SCSI_IO:
 244         {
 245                 struct ccb_hdr          *ccbh = &ccb->ccb_h;
 246                 struct ccb_scsiio       *csio = &ccb->csio;
 247
 248                 /* Validate the CCB */
 249                 ccbh->status = CAM_REQ_INPROG;
 250
 251                 /* check the CDB length */
 252                 if (csio->cdb_len > AMR_MAX_EXTCDB_LEN)
 253                         ccbh->status = CAM_REQ_INVALID;
 254
 255                 if ((csio->cdb_len > AMR_MAX_CDB_LEN) &&
 256                     (sc->support_ext_cdb == 0))
 257                         ccbh->status = CAM_REQ_INVALID;
 258
 259                 /* check that the CDB pointer is not to a physical address */
 260                 if ((ccbh->flags & CAM_CDB_POINTER) &&
 261                     (ccbh->flags & CAM_CDB_PHYS))
 262                         ccbh->status = CAM_REQ_INVALID;
 263                 /*
 264                  * if there is data transfer, it must be to/from a virtual
 265                  * address
 266                  */
 267                 if ((ccbh->flags & CAM_DIR_MASK) != CAM_DIR_NONE) {
 268                         if (ccbh->flags & CAM_DATA_PHYS)
 269                                 /* we can't map it */
 270                                 ccbh->status = CAM_REQ_INVALID;
 271                         if (ccbh->flags & CAM_SCATTER_VALID)
 272                                 /* we want to do the s/g setup */
 273                                 ccbh->status = CAM_REQ_INVALID;
 274                 }
 275
 276                 /*
 277                  * If the command is to a LUN other than 0, fail it.
 278                  * This is probably incorrect, but during testing the
 279                  * firmware did not seem to respect the LUN field, and thus
 280                  * devices appear echoed.
 281                  */
 282                 if (csio->ccb_h.target_lun != 0)
 283                         ccbh->status = CAM_DEV_NOT_THERE;
 284
 285                 /* if we're happy with the request, queue it for attention */
 286                 if (ccbh->status == CAM_REQ_INPROG) {
 287
 288                         /* save the channel number in the ccb */
 289                         csio->ccb_h.sim_priv.entries[0].field= cam_sim_bus(sim);
 290
 291                         amr_enqueue_ccb(sc, ccb);
 292                         amr_startio(sc);
 293                         return;
 294                 }
 295                 break;
 296         }
 297
 298         case XPT_CALC_GEOMETRY:
 299         {
 300                 cam_calc_geometry(&ccb->ccg, /*extended*/1);
 301                 break;
 302         }
 303
 304         /*
 305          * Return path stats.  Some of these should probably be amended.
 306          */
 307         case XPT_PATH_INQ:
 308         {
 309                 struct ccb_pathinq        *cpi = & ccb->cpi;
 310
 311                 debug(3, "XPT_PATH_INQ");
 312                 cpi->version_num = 1;              /* XXX??? */
 313                 cpi->hba_inquiry = PI_SDTR_ABLE|PI_TAG_ABLE|PI_WIDE_16;
 314                 cpi->target_sprt = 0;
 315                 cpi->hba_misc = PIM_NOBUSRESET|PIM_SEQSCAN;
 316                 cpi->hba_eng_cnt = 0;
 317                 cpi->max_target = AMR_MAX_TARGETS;
 318                 cpi->max_lun = 0 /* AMR_MAX_LUNS*/;
 319                 cpi->initiator_id = 7;            /* XXX variable? */
 320                 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
 321                 strncpy(cpi->hba_vid, "LSI", HBA_IDLEN);
 322                 strncpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN);
 323                 cpi->unit_number = cam_sim_unit(sim);
 324                 cpi->bus_id = cam_sim_bus(sim);
 325                 cpi->base_transfer_speed = 132 * 1024;  /* XXX */
 326                 cpi->transport = XPORT_SPI;
 327                 cpi->transport_version = 2;
 328                 cpi->protocol = PROTO_SCSI;
 329                 cpi->protocol_version = SCSI_REV_2;
 330                 cpi->ccb_h.status = CAM_REQ_CMP;
 331
 332                 break;
 333         }
 334
 335         case XPT_RESET_BUS:
 336         {
 337                 struct ccb_pathinq      *cpi = & ccb->cpi;
 338
 339                 debug(1, "XPT_RESET_BUS");
 340                 cpi->ccb_h.status = CAM_REQ_CMP;
 341                 break;
 342         }
 343
 344         case XPT_RESET_DEV:
 345         {
 346                 debug(1, "XPT_RESET_DEV");
 347                 ccb->ccb_h.status = CAM_REQ_CMP;
 348                 break;
 349         }
 350
 351         case XPT_GET_TRAN_SETTINGS:
 352         {
 353                 struct ccb_trans_settings       *cts = &(ccb->cts);
 354
 355                 debug(3, "XPT_GET_TRAN_SETTINGS");
 356
 357                 struct ccb_trans_settings_scsi *scsi;
 358                 struct ccb_trans_settings_spi *spi;
 359
 360                 scsi = &cts->proto_specific.scsi;
 361                 spi = &cts->xport_specific.spi;
 362
 363                 cts->protocol = PROTO_SCSI;
 364                 cts->protocol_version = SCSI_REV_2;
 365                 cts->transport = XPORT_SPI;
 366                 cts->transport_version = 2;
 367
 368                 if (cts->type == CTS_TYPE_USER_SETTINGS) {
 369                         ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
 370                         break;
 371                 }
 372
 373                 spi->flags = CTS_SPI_FLAGS_DISC_ENB;
 374                 spi->bus_width = MSG_EXT_WDTR_BUS_32_BIT;
 375                 spi->sync_period = 6;   /* 40MHz how wide is this bus? */
 376                 spi->sync_offset = 31;  /* How to extract this from board? */
 377
 378                 spi->valid = CTS_SPI_VALID_SYNC_RATE
 379                         | CTS_SPI_VALID_SYNC_OFFSET
 380                         | CTS_SPI_VALID_BUS_WIDTH
 381                         | CTS_SPI_VALID_DISC;
 382                 scsi->valid = CTS_SCSI_VALID_TQ;
 383                 ccb->ccb_h.status = CAM_REQ_CMP;
 384                 break;
 385         }
 386
 387         case XPT_SET_TRAN_SETTINGS:
 388                 debug(3, "XPT_SET_TRAN_SETTINGS");
 389                 ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
 390                 break;
 391
 392
 393         /*
 394          * Reject anything else as unsupported.
 395          */
 396         default:
 397                 /* we can't do this */
 398                 ccb->ccb_h.status = CAM_REQ_INVALID;
 399                 break;
 400         }
 401
 402         KKASSERT(lockstatus(&sc->amr_list_lock, curthread) != 0);
 403         xpt_done(ccb);
 404 }
 405
 406 /***********************************************************************
 407  * Convert a CAM CCB off the top of the CCB queue to a passthrough SCSI
 408  * command.
 409  */
 410 static int
 411 amr_cam_command(struct amr_softc *sc, struct amr_command **acp)
 412 {
 413         struct amr_command              *ac;
 414         struct amr_passthrough          *ap;
 415         struct amr_ext_passthrough      *aep;
 416         struct ccb_scsiio               *csio;
 417         int                             bus, target, error;
 418
 419         error = 0;
 420         ac = NULL;
 421         ap = NULL;
 422         aep = NULL;
 423
 424         /* check to see if there is a ccb for us to work with */
 425         if ((csio = (struct ccb_scsiio *)amr_dequeue_ccb(sc)) == NULL)
 426         goto out;
 427
 428         /* get bus/target, XXX validate against protected devices? */
 429         bus = csio->ccb_h.sim_priv.entries[0].field;
 430         target = csio->ccb_h.target_id;
 431
 432         /*
 433          * Build a passthrough command.
 434          */
 435
 436         /* construct command */
 437         if ((ac = amr_alloccmd(sc)) == NULL) {
 438                 error = ENOMEM;
 439                 goto out;
 440         }
 441
 442         /* construct passthrough */
 443         if (sc->support_ext_cdb ) {
 444                 aep = &ac->ac_ccb->ccb_epthru;
 445                 aep->ap_timeout = 2;
 446                 aep->ap_ars = 1;
 447                 aep->ap_request_sense_length = 14;
 448                 aep->ap_islogical = 0;
 449                 aep->ap_channel = bus;
 450                 aep->ap_scsi_id = target;
 451                 aep->ap_logical_drive_no = csio->ccb_h.target_lun;
 452                 aep->ap_cdb_length = csio->cdb_len;
 453                 aep->ap_data_transfer_length = csio->dxfer_len;
 454                 if (csio->ccb_h.flags & CAM_CDB_POINTER) {
 455                         bcopy(csio->cdb_io.cdb_ptr, aep->ap_cdb, csio->cdb_len);
 456                 } else {
 457                         bcopy(csio->cdb_io.cdb_bytes, aep->ap_cdb,
 458                             csio->cdb_len);
 459                 }
 460                 /*
 461                  * we leave the data s/g list and s/g count to the map routine
 462                  * later
 463                  */
 464
 465                 debug(2, " COMMAND %x/%d+%d to %d:%d:%d", aep->ap_cdb[0],
 466                     aep->ap_cdb_length, csio->dxfer_len, aep->ap_channel,
 467                     aep->ap_scsi_id, aep->ap_logical_drive_no);
 468
 469         } else {
 470                 ap = &ac->ac_ccb->ccb_pthru;
 471                 ap->ap_timeout = 0;
 472                 ap->ap_ars = 1;
 473                 ap->ap_request_sense_length = 14;
 474                 ap->ap_islogical = 0;
 475                 ap->ap_channel = bus;
 476                 ap->ap_scsi_id = target;
 477                 ap->ap_logical_drive_no = csio->ccb_h.target_lun;
 478                 ap->ap_cdb_length = csio->cdb_len;
 479                 ap->ap_data_transfer_length = csio->dxfer_len;
 480                 if (csio->ccb_h.flags & CAM_CDB_POINTER) {
 481                         bcopy(csio->cdb_io.cdb_ptr, ap->ap_cdb, csio->cdb_len);
 482                 } else {
 483                         bcopy(csio->cdb_io.cdb_bytes, ap->ap_cdb,
 484                             csio->cdb_len);
 485                 }
 486                 /*
 487                  * we leave the data s/g list and s/g count to the map routine
 488                  * later
 489                  */
 490
 491                 debug(2, " COMMAND %x/%d+%d to %d:%d:%d", ap->ap_cdb[0],
 492                     ap->ap_cdb_length, csio->dxfer_len, ap->ap_channel,
 493                     ap->ap_scsi_id, ap->ap_logical_drive_no);
 494         }
 495
 496         ac->ac_flags |= AMR_CMD_CCB;
 497
 498         ac->ac_data = csio->data_ptr;
 499         ac->ac_length = csio->dxfer_len;
 500         if ((csio->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN)
 501                 ac->ac_flags |= AMR_CMD_DATAIN;
 502         if ((csio->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_OUT)
 503                 ac->ac_flags |= AMR_CMD_DATAOUT;
 504
 505         ac->ac_private = csio;
 506         ac->ac_complete = amr_cam_complete;
 507         if ( sc->support_ext_cdb ) {
 508                 ac->ac_mailbox.mb_command = AMR_CMD_EXTPASS;
 509         } else {
 510                 ac->ac_mailbox.mb_command = AMR_CMD_PASS;
 511         }
 512
 513 out:
 514         if (error != 0) {
 515                 if (ac != NULL)
 516                         amr_releasecmd(ac);
 517                 if (csio != NULL)
 518                         /* put it back and try again later */
 519                         amr_requeue_ccb(sc, (union ccb *)csio);
 520         }
 521         *acp = ac;
 522         return(error);
 523 }
 524
 525 /***********************************************************************
 526  * Check for interrupt status
 527  */
 528 static void
 529 amr_cam_poll(struct cam_sim *sim)
 530 {
 531
 532         amr_done(cam_sim_softc(sim));
 533 }
 534
 535  /**********************************************************************
 536  * Handle completion of a command submitted via CAM.
 537  */
 538 static void
 539 amr_cam_complete(struct amr_command *ac)
 540 {
 541         struct amr_passthrough          *ap;
 542         struct amr_ext_passthrough      *aep;
 543         struct ccb_scsiio               *csio;
 544         struct scsi_inquiry_data        *inq;
 545         int                             scsi_status, cdb0;
 546
 547         ap = &ac->ac_ccb->ccb_pthru;
 548         aep = &ac->ac_ccb->ccb_epthru;
 549         csio = (struct ccb_scsiio *)ac->ac_private;
 550         inq = (struct scsi_inquiry_data *)csio->data_ptr;
 551
 552         if (ac->ac_mailbox.mb_command == AMR_CMD_EXTPASS)
 553                 scsi_status = aep->ap_scsi_status;
 554         else
 555                 scsi_status = ap->ap_scsi_status;
 556         debug(1, "status 0x%x  AP scsi_status 0x%x", ac->ac_status,
 557             scsi_status);
 558
 559         /* Make sure the status is sane */
 560         if ((ac->ac_status != AMR_STATUS_SUCCESS) && (scsi_status == 0)) {
 561                 csio->ccb_h.status = CAM_REQ_CMP_ERR;
 562                 goto out;
 563         }
 564
 565         /*
 566          * Hide disks from CAM so that they're not picked up and treated as
 567          * 'normal' disks.
 568          *
 569          * If the configuration provides a mechanism to mark a disk a "not
 570          * managed", we could add handling for that to allow disks to be
 571          * selectively visible.
 572          */
 573
 574         /* handle passthrough SCSI status */
 575         switch(scsi_status) {
 576         case 0: /* completed OK */
 577                 if (ac->ac_mailbox.mb_command == AMR_CMD_EXTPASS)
 578                         cdb0 = aep->ap_cdb[0];
 579                 else
 580                         cdb0 = ap->ap_cdb[0];
 581                 if ((cdb0 == INQUIRY) && (SID_TYPE(inq) == T_DIRECT))
 582                         inq->device = (inq->device & 0xe0) | T_NODEVICE;
 583                 csio->ccb_h.status = CAM_REQ_CMP;
 584                 break;
 585
 586         case 0x02:
 587                 csio->ccb_h.status = CAM_SCSI_STATUS_ERROR;
 588                 csio->scsi_status = SCSI_STATUS_CHECK_COND;
 589                 if (ac->ac_mailbox.mb_command == AMR_CMD_EXTPASS)
 590                         bcopy(aep->ap_request_sense_area, &csio->sense_data,
 591                             AMR_MAX_REQ_SENSE_LEN);
 592                 else
 593                         bcopy(ap->ap_request_sense_area, &csio->sense_data,
 594                             AMR_MAX_REQ_SENSE_LEN);
 595                 csio->sense_len = AMR_MAX_REQ_SENSE_LEN;
 596                 csio->ccb_h.status |= CAM_AUTOSNS_VALID;
 597                 break;
 598
 599         case 0x08:
 600                 csio->ccb_h.status = CAM_SCSI_BUSY;
 601                 break;
 602
 603         case 0xf0:
 604         case 0xf4:
 605         default:
 606                 /*
 607                  * Non-zero LUNs are already filtered, so there's no need
 608                  * to return CAM_DEV_NOT_THERE.
 609                  */
 610                 csio->ccb_h.status = CAM_SEL_TIMEOUT;
 611                 break;
 612         }
 613
 614 out:
 615         if ((csio->ccb_h.flags & CAM_DIR_MASK) != CAM_DIR_NONE)
 616                 debug(2, "%*D\n", imin(csio->dxfer_len, 16), csio->data_ptr,
 617                     " ");
 618
 619         lockmgr(&ac->ac_sc->amr_list_lock, LK_EXCLUSIVE);
 620         xpt_done((union ccb *)csio);
 621         amr_releasecmd(ac);
 622         lockmgr(&ac->ac_sc->amr_list_lock, LK_RELEASE);
 623 }