sys/dev/amr/amr_cam.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
   3  *
   4  * Copyright (c) 2000 Michael Smith
   5  * Copyright (c) 2000 BSDi
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *      notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *      notice, this list of conditions and the following disclaimer in the
  15  *      documentation and/or other materials provided with the distribution.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  29 /*-
  30  * Copyright (c) 2002 Eric Moore
  31  * Copyright (c) 2002 LSI Logic Corporation
  32  * All rights reserved.
  33  *
  34  * Redistribution and use in source and binary forms, with or without
  35  * modification, are permitted provided that the following conditions
  36  * are met:
  37  * 1. Redistributions of source code must retain the above copyright
  38  *      notice, this list of conditions and the following disclaimer.
  39  * 2. Redistributions in binary form must reproduce the above copyright
  40  *      notice, this list of conditions and the following disclaimer in the
  41  *      documentation and/or other materials provided with the distribution.
  42  * 3. The party using or redistributing the source code and binary forms
  43  *      agrees to the disclaimer below and the terms and conditions set forth
  44  *      herein.
  45  *
  46  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  47  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  48  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  49  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  50  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  51  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  52  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  53  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  54  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  55  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  56  * SUCH DAMAGE.
  57  */
  58
  59 #include <sys/cdefs.h>
  60 __FBSDID("$FreeBSD$");
  61
  62 #include <sys/param.h>
  63 #include <sys/systm.h>
  64 #include <sys/malloc.h>
  65 #include <sys/kernel.h>
  66 #include <sys/module.h>
  67
  68 #include <sys/bio.h>
  69 #include <sys/bus.h>
  70 #include <sys/conf.h>
  71 #include <sys/stat.h>
  72
  73 #include <cam/cam.h>
  74 #include <cam/cam_ccb.h>
  75 #include <cam/cam_sim.h>
  76 #include <cam/cam_xpt.h>
  77 #include <cam/cam_xpt_sim.h>
  78 #include <cam/cam_debug.h>
  79 #include <cam/scsi/scsi_all.h>
  80 #include <cam/scsi/scsi_message.h>
  81
  82 #include <machine/resource.h>
  83 #include <machine/bus.h>
  84
  85 #include <dev/amr/amrreg.h>
  86 #include <dev/amr/amrvar.h>
  87
  88 static int      amr_cam_probe(device_t dev);
  89 static int      amr_cam_attach(device_t dev);
  90 static int      amr_cam_detach(device_t dev);
  91 static void     amr_cam_action(struct cam_sim *sim, union ccb *ccb);
  92 static void     amr_cam_poll(struct cam_sim *sim);
  93 static void     amr_cam_complete(struct amr_command *ac);
  94 static int      amr_cam_command(struct amr_softc *sc, struct amr_command **acp);
  95
  96 static devclass_t       amr_pass_devclass;
  97
  98 static device_method_t  amr_pass_methods[] = {
  99         DEVMETHOD(device_probe,         amr_cam_probe),
 100         DEVMETHOD(device_attach,        amr_cam_attach),
 101         DEVMETHOD(device_detach,        amr_cam_detach),
 102         { 0, 0 }
 103 };
 104
 105 static driver_t amr_pass_driver = {
 106         "amrp",
 107         amr_pass_methods,
 108         0
 109 };
 110
 111 DRIVER_MODULE(amrp, amr, amr_pass_driver, amr_pass_devclass, 0, 0);
 112 MODULE_DEPEND(amrp, cam, 1, 1, 1);
 113
 114 static MALLOC_DEFINE(M_AMRCAM, "amrcam", "AMR CAM memory");
 115
 116 /***********************************************************************
 117  * Enqueue/dequeue functions
 118  */
 119 static __inline void
 120 amr_enqueue_ccb(struct amr_softc *sc, union ccb *ccb)
 121 {
 122
 123         TAILQ_INSERT_TAIL(&sc->amr_cam_ccbq, &ccb->ccb_h, sim_links.tqe);
 124 }
 125
 126 static __inline void
 127 amr_requeue_ccb(struct amr_softc *sc, union ccb *ccb)
 128 {
 129
 130         TAILQ_INSERT_HEAD(&sc->amr_cam_ccbq, &ccb->ccb_h, sim_links.tqe);
 131 }
 132
 133 static __inline union ccb *
 134 amr_dequeue_ccb(struct amr_softc *sc)
 135 {
 136         union ccb       *ccb;
 137
 138         if ((ccb = (union ccb *)TAILQ_FIRST(&sc->amr_cam_ccbq)) != NULL)
 139                 TAILQ_REMOVE(&sc->amr_cam_ccbq, &ccb->ccb_h, sim_links.tqe);
 140         return(ccb);
 141 }
 142
 143 static int
 144 amr_cam_probe(device_t dev)
 145 {
 146         return (0);
 147 }
 148
 149 /********************************************************************************
 150  * Attach our 'real' SCSI channels to CAM
 151  */
 152 static int
 153 amr_cam_attach(device_t dev)
 154 {
 155         struct amr_softc *sc;
 156         struct cam_devq *devq;
 157         int chn, error;
 158
 159         sc = device_get_softc(dev);
 160
 161         /* initialise the ccb queue */
 162         TAILQ_INIT(&sc->amr_cam_ccbq);
 163
 164         /*
 165          * Allocate a devq for all our channels combined.  This should
 166          * allow for the maximum number of SCSI commands we will accept
 167          * at one time. Save the pointer in the softc so we can find it later
 168          * during detach.
 169          */
 170         if ((devq = cam_simq_alloc(AMR_MAX_SCSI_CMDS)) == NULL)
 171                 return(ENOMEM);
 172         sc->amr_cam_devq = devq;
 173
 174         /*
 175          * Iterate over our channels, registering them with CAM
 176          */
 177         for (chn = 0; chn < sc->amr_maxchan; chn++) {
 178
 179                 /* allocate a sim */
 180                 if ((sc->amr_cam_sim[chn] = cam_sim_alloc(amr_cam_action,
 181                     amr_cam_poll, "amr", sc, device_get_unit(sc->amr_dev),
 182                     &sc->amr_list_lock, 1, AMR_MAX_SCSI_CMDS, devq)) == NULL) {
 183                         cam_simq_free(devq);
 184                         device_printf(sc->amr_dev, "CAM SIM attach failed\n");
 185                         return(ENOMEM);
 186                 }
 187
 188                 /* register the bus ID so we can get it later */
 189                 mtx_lock(&sc->amr_list_lock);
 190                 error = xpt_bus_register(sc->amr_cam_sim[chn], sc->amr_dev,chn);
 191                 mtx_unlock(&sc->amr_list_lock);
 192                 if (error) {
 193                         device_printf(sc->amr_dev,
 194                             "CAM XPT bus registration failed\n");
 195                         return(ENXIO);
 196                 }
 197         }
 198         /*
 199          * XXX we should scan the config and work out which devices are
 200          * actually protected.
 201          */
 202         sc->amr_cam_command = amr_cam_command;
 203         return(0);
 204 }
 205
 206 /********************************************************************************
 207  * Disconnect ourselves from CAM
 208  */
 209 static int
 210 amr_cam_detach(device_t dev)
 211 {
 212         struct amr_softc *sc;
 213         int             chn;
 214
 215         sc = device_get_softc(dev);
 216         mtx_lock(&sc->amr_list_lock);
 217         for (chn = 0; chn < sc->amr_maxchan; chn++) {
 218                 /*
 219                  * If a sim was allocated for this channel, free it
 220                  */
 221                 if (sc->amr_cam_sim[chn] != NULL) {
 222                         xpt_bus_deregister(cam_sim_path(sc->amr_cam_sim[chn]));
 223                         cam_sim_free(sc->amr_cam_sim[chn], FALSE);
 224                 }
 225         }
 226         mtx_unlock(&sc->amr_list_lock);
 227
 228         /* Now free the devq */
 229         if (sc->amr_cam_devq != NULL)
 230                 cam_simq_free(sc->amr_cam_devq);
 231
 232         return (0);
 233 }
 234
 235 /***********************************************************************
 236  ***********************************************************************
 237                         CAM passthrough interface
 238  ***********************************************************************
 239  ***********************************************************************/
 240
 241 /***********************************************************************
 242  * Handle a request for action from CAM
 243  */
 244 static void
 245 amr_cam_action(struct cam_sim *sim, union ccb *ccb)
 246 {
 247         struct amr_softc        *sc = cam_sim_softc(sim);
 248
 249         switch(ccb->ccb_h.func_code) {
 250
 251         /*
 252          * Perform SCSI I/O to a physical device.
 253          */
 254         case XPT_SCSI_IO:
 255         {
 256                 struct ccb_hdr          *ccbh = &ccb->ccb_h;
 257                 struct ccb_scsiio       *csio = &ccb->csio;
 258
 259                 /* Validate the CCB */
 260                 ccbh->status = CAM_REQ_INPROG;
 261
 262                 /* check the CDB length */
 263                 if (csio->cdb_len > AMR_MAX_EXTCDB_LEN)
 264                         ccbh->status = CAM_REQ_INVALID;
 265
 266                 if ((csio->cdb_len > AMR_MAX_CDB_LEN) &&
 267                     (sc->support_ext_cdb == 0))
 268                         ccbh->status = CAM_REQ_INVALID;
 269
 270                 /* check that the CDB pointer is not to a physical address */
 271                 if ((ccbh->flags & CAM_CDB_POINTER) &&
 272                     (ccbh->flags & CAM_CDB_PHYS))
 273                         ccbh->status = CAM_REQ_INVALID;
 274                 /*
 275                  * if there is data transfer, it must be to/from a virtual
 276                  * address
 277                  */
 278                 if ((ccbh->flags & CAM_DIR_MASK) != CAM_DIR_NONE) {
 279                         if ((ccbh->flags & CAM_DATA_MASK) != CAM_DATA_VADDR)
 280                                 /* we can't map it */
 281                                 ccbh->status = CAM_REQ_INVALID;
 282                 }
 283
 284                 /*
 285                  * If the command is to a LUN other than 0, fail it.
 286                  * This is probably incorrect, but during testing the
 287                  * firmware did not seem to respect the LUN field, and thus
 288                  * devices appear echoed.
 289                  */
 290                 if (csio->ccb_h.target_lun != 0)
 291                         ccbh->status = CAM_DEV_NOT_THERE;
 292
 293                 /* if we're happy with the request, queue it for attention */
 294                 if (ccbh->status == CAM_REQ_INPROG) {
 295
 296                         /* save the channel number in the ccb */
 297                         csio->ccb_h.sim_priv.entries[0].field= cam_sim_bus(sim);
 298
 299                         amr_enqueue_ccb(sc, ccb);
 300                         amr_startio(sc);
 301                         return;
 302                 }
 303                 break;
 304         }
 305
 306         case XPT_CALC_GEOMETRY:
 307         {
 308                 cam_calc_geometry(&ccb->ccg, /*extended*/1);
 309                 break;
 310         }
 311
 312         /*
 313          * Return path stats.  Some of these should probably be amended.
 314          */
 315         case XPT_PATH_INQ:
 316         {
 317                 struct ccb_pathinq        *cpi = & ccb->cpi;
 318
 319                 debug(3, "XPT_PATH_INQ");
 320                 cpi->version_num = 1;              /* XXX??? */
 321                 cpi->hba_inquiry = PI_SDTR_ABLE|PI_TAG_ABLE|PI_WIDE_16;
 322                 cpi->target_sprt = 0;
 323                 cpi->hba_misc = PIM_NOBUSRESET|PIM_SEQSCAN;
 324                 cpi->hba_eng_cnt = 0;
 325                 cpi->max_target = AMR_MAX_TARGETS;
 326                 cpi->max_lun = 0 /* AMR_MAX_LUNS*/;
 327                 cpi->initiator_id = 7;            /* XXX variable? */
 328                 strlcpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
 329                 strlcpy(cpi->hba_vid, "LSI", HBA_IDLEN);
 330                 strlcpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN);
 331                 cpi->unit_number = cam_sim_unit(sim);
 332                 cpi->bus_id = cam_sim_bus(sim);
 333                 cpi->base_transfer_speed = 132 * 1024;  /* XXX */
 334                 cpi->transport = XPORT_SPI;
 335                 cpi->transport_version = 2;
 336                 cpi->protocol = PROTO_SCSI;
 337                 cpi->protocol_version = SCSI_REV_2;
 338                 cpi->ccb_h.status = CAM_REQ_CMP;
 339
 340                 break;
 341         }
 342
 343         case XPT_RESET_BUS:
 344         {
 345                 struct ccb_pathinq      *cpi = & ccb->cpi;
 346
 347                 debug(1, "XPT_RESET_BUS");
 348                 cpi->ccb_h.status = CAM_REQ_CMP;
 349                 break;
 350         }
 351
 352         case XPT_RESET_DEV:
 353         {
 354                 debug(1, "XPT_RESET_DEV");
 355                 ccb->ccb_h.status = CAM_REQ_CMP;
 356                 break;
 357         }
 358
 359         case XPT_GET_TRAN_SETTINGS:
 360         {
 361                 struct ccb_trans_settings       *cts = &(ccb->cts);
 362
 363                 debug(3, "XPT_GET_TRAN_SETTINGS");
 364
 365                 struct ccb_trans_settings_scsi *scsi;
 366                 struct ccb_trans_settings_spi *spi;
 367
 368                 scsi = &cts->proto_specific.scsi;
 369                 spi = &cts->xport_specific.spi;
 370
 371                 cts->protocol = PROTO_SCSI;
 372                 cts->protocol_version = SCSI_REV_2;
 373                 cts->transport = XPORT_SPI;
 374                 cts->transport_version = 2;
 375
 376                 if (cts->type == CTS_TYPE_USER_SETTINGS) {
 377                         ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
 378                         break;
 379                 }
 380
 381                 spi->flags = CTS_SPI_FLAGS_DISC_ENB;
 382                 spi->bus_width = MSG_EXT_WDTR_BUS_32_BIT;
 383                 spi->sync_period = 6;   /* 40MHz how wide is this bus? */
 384                 spi->sync_offset = 31;  /* How to extract this from board? */
 385
 386                 spi->valid = CTS_SPI_VALID_SYNC_RATE
 387                         | CTS_SPI_VALID_SYNC_OFFSET
 388                         | CTS_SPI_VALID_BUS_WIDTH
 389                         | CTS_SPI_VALID_DISC;
 390                 scsi->valid = CTS_SCSI_VALID_TQ;
 391                 ccb->ccb_h.status = CAM_REQ_CMP;
 392                 break;
 393         }
 394
 395         case XPT_SET_TRAN_SETTINGS:
 396                 debug(3, "XPT_SET_TRAN_SETTINGS");
 397                 ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
 398                 break;
 399
 400
 401         /*
 402          * Reject anything else as unsupported.
 403          */
 404         default:
 405                 /* we can't do this */
 406                 ccb->ccb_h.status = CAM_REQ_INVALID;
 407                 break;
 408         }
 409
 410         mtx_assert(&sc->amr_list_lock, MA_OWNED);
 411         xpt_done(ccb);
 412 }
 413
 414 /***********************************************************************
 415  * Convert a CAM CCB off the top of the CCB queue to a passthrough SCSI
 416  * command.
 417  */
 418 static int
 419 amr_cam_command(struct amr_softc *sc, struct amr_command **acp)
 420 {
 421         struct amr_command              *ac;
 422         struct amr_passthrough          *ap;
 423         struct amr_ext_passthrough      *aep;
 424         struct ccb_scsiio               *csio;
 425         int                             bus, target, error;
 426
 427         error = 0;
 428         ac = NULL;
 429         ap = NULL;
 430         aep = NULL;
 431
 432         /* check to see if there is a ccb for us to work with */
 433         if ((csio = (struct ccb_scsiio *)amr_dequeue_ccb(sc)) == NULL)
 434         goto out;
 435
 436         /* get bus/target, XXX validate against protected devices? */
 437         bus = csio->ccb_h.sim_priv.entries[0].field;
 438         target = csio->ccb_h.target_id;
 439
 440         /*
 441          * Build a passthrough command.
 442          */
 443
 444         /* construct command */
 445         if ((ac = amr_alloccmd(sc)) == NULL) {
 446                 error = ENOMEM;
 447                 goto out;
 448         }
 449
 450         /* construct passthrough */
 451         if (sc->support_ext_cdb ) {
 452                 aep = &ac->ac_ccb->ccb_epthru;
 453                 aep->ap_timeout = 2;
 454                 aep->ap_ars = 1;
 455                 aep->ap_request_sense_length = 14;
 456                 aep->ap_islogical = 0;
 457                 aep->ap_channel = bus;
 458                 aep->ap_scsi_id = target;
 459                 aep->ap_logical_drive_no = csio->ccb_h.target_lun;
 460                 aep->ap_cdb_length = csio->cdb_len;
 461                 aep->ap_data_transfer_length = csio->dxfer_len;
 462                 if (csio->ccb_h.flags & CAM_CDB_POINTER) {
 463                         bcopy(csio->cdb_io.cdb_ptr, aep->ap_cdb, csio->cdb_len);
 464                 } else {
 465                         bcopy(csio->cdb_io.cdb_bytes, aep->ap_cdb,
 466                             csio->cdb_len);
 467                 }
 468                 /*
 469                  * we leave the data s/g list and s/g count to the map routine
 470                  * later
 471                  */
 472
 473                 debug(2, " COMMAND %x/%d+%d to %d:%d:%d", aep->ap_cdb[0],
 474                     aep->ap_cdb_length, csio->dxfer_len, aep->ap_channel,
 475                     aep->ap_scsi_id, aep->ap_logical_drive_no);
 476
 477         } else {
 478                 ap = &ac->ac_ccb->ccb_pthru;
 479                 ap->ap_timeout = 0;
 480                 ap->ap_ars = 1;
 481                 ap->ap_request_sense_length = 14;
 482                 ap->ap_islogical = 0;
 483                 ap->ap_channel = bus;
 484                 ap->ap_scsi_id = target;
 485                 ap->ap_logical_drive_no = csio->ccb_h.target_lun;
 486                 ap->ap_cdb_length = csio->cdb_len;
 487                 ap->ap_data_transfer_length = csio->dxfer_len;
 488                 if (csio->ccb_h.flags & CAM_CDB_POINTER) {
 489                         bcopy(csio->cdb_io.cdb_ptr, ap->ap_cdb, csio->cdb_len);
 490                 } else {
 491                         bcopy(csio->cdb_io.cdb_bytes, ap->ap_cdb,
 492                             csio->cdb_len);
 493                 }
 494                 /*
 495                  * we leave the data s/g list and s/g count to the map routine
 496                  * later
 497                  */
 498
 499                 debug(2, " COMMAND %x/%d+%d to %d:%d:%d", ap->ap_cdb[0],
 500                     ap->ap_cdb_length, csio->dxfer_len, ap->ap_channel,
 501                     ap->ap_scsi_id, ap->ap_logical_drive_no);
 502         }
 503
 504         ac->ac_flags |= AMR_CMD_CCB;
 505
 506         ac->ac_data = csio->data_ptr;
 507         ac->ac_length = csio->dxfer_len;
 508         if ((csio->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN)
 509                 ac->ac_flags |= AMR_CMD_DATAIN;
 510         if ((csio->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_OUT)
 511                 ac->ac_flags |= AMR_CMD_DATAOUT;
 512
 513         ac->ac_private = csio;
 514         ac->ac_complete = amr_cam_complete;
 515         if ( sc->support_ext_cdb ) {
 516                 ac->ac_mailbox.mb_command = AMR_CMD_EXTPASS;
 517         } else {
 518                 ac->ac_mailbox.mb_command = AMR_CMD_PASS;
 519         }
 520
 521 out:
 522         if (error != 0) {
 523                 if (ac != NULL)
 524                         amr_releasecmd(ac);
 525                 if (csio != NULL)
 526                         /* put it back and try again later */
 527                         amr_requeue_ccb(sc, (union ccb *)csio);
 528         }
 529         *acp = ac;
 530         return(error);
 531 }
 532
 533 /***********************************************************************
 534  * Check for interrupt status
 535  */
 536 static void
 537 amr_cam_poll(struct cam_sim *sim)
 538 {
 539
 540         amr_done(cam_sim_softc(sim));
 541 }
 542
 543  /**********************************************************************
 544  * Handle completion of a command submitted via CAM.
 545  */
 546 static void
 547 amr_cam_complete(struct amr_command *ac)
 548 {
 549         struct amr_passthrough          *ap;
 550         struct amr_ext_passthrough      *aep;
 551         struct ccb_scsiio               *csio;
 552         struct scsi_inquiry_data        *inq;
 553         int                             scsi_status, cdb0;
 554
 555         ap = &ac->ac_ccb->ccb_pthru;
 556         aep = &ac->ac_ccb->ccb_epthru;
 557         csio = (struct ccb_scsiio *)ac->ac_private;
 558         inq = (struct scsi_inquiry_data *)csio->data_ptr;
 559
 560         if (ac->ac_mailbox.mb_command == AMR_CMD_EXTPASS)
 561                 scsi_status = aep->ap_scsi_status;
 562         else
 563                 scsi_status = ap->ap_scsi_status;
 564         debug(1, "status 0x%x  AP scsi_status 0x%x", ac->ac_status,
 565             scsi_status);
 566
 567         /* Make sure the status is sane */
 568         if ((ac->ac_status != AMR_STATUS_SUCCESS) && (scsi_status == 0)) {
 569                 csio->ccb_h.status = CAM_REQ_CMP_ERR;
 570                 goto out;
 571         }
 572
 573         /*
 574          * Hide disks from CAM so that they're not picked up and treated as
 575          * 'normal' disks.
 576          *
 577          * If the configuration provides a mechanism to mark a disk a "not
 578          * managed", we could add handling for that to allow disks to be
 579          * selectively visible.
 580          */
 581
 582         /* handle passthrough SCSI status */
 583         switch(scsi_status) {
 584         case 0: /* completed OK */
 585                 if (ac->ac_mailbox.mb_command == AMR_CMD_EXTPASS)
 586                         cdb0 = aep->ap_cdb[0];
 587                 else
 588                         cdb0 = ap->ap_cdb[0];
 589                 if ((cdb0 == INQUIRY) && (SID_TYPE(inq) == T_DIRECT))
 590                         inq->device = (inq->device & 0xe0) | T_NODEVICE;
 591                 csio->ccb_h.status = CAM_REQ_CMP;
 592                 break;
 593
 594         case 0x02:
 595                 csio->ccb_h.status = CAM_SCSI_STATUS_ERROR;
 596                 csio->scsi_status = SCSI_STATUS_CHECK_COND;
 597                 if (ac->ac_mailbox.mb_command == AMR_CMD_EXTPASS)
 598                         bcopy(aep->ap_request_sense_area, &csio->sense_data,
 599                             AMR_MAX_REQ_SENSE_LEN);
 600                 else
 601                         bcopy(ap->ap_request_sense_area, &csio->sense_data,
 602                             AMR_MAX_REQ_SENSE_LEN);
 603                 csio->sense_len = AMR_MAX_REQ_SENSE_LEN;
 604                 csio->ccb_h.status |= CAM_AUTOSNS_VALID;
 605                 break;
 606
 607         case 0x08:
 608                 csio->ccb_h.status = CAM_SCSI_BUSY;
 609                 break;
 610
 611         case 0xf0:
 612         case 0xf4:
 613         default:
 614                 /*
 615                  * Non-zero LUNs are already filtered, so there's no need
 616                  * to return CAM_DEV_NOT_THERE.
 617                  */
 618                 csio->ccb_h.status = CAM_SEL_TIMEOUT;
 619                 break;
 620         }
 621
 622 out:
 623         if ((csio->ccb_h.flags & CAM_DIR_MASK) != CAM_DIR_NONE)
 624                 debug(2, "%*D\n", imin(csio->dxfer_len, 16), csio->data_ptr,
 625                     " ");
 626
 627         mtx_lock(&ac->ac_sc->amr_list_lock);
 628         xpt_done((union ccb *)csio);
 629         amr_releasecmd(ac);
 630         mtx_unlock(&ac->ac_sc->amr_list_lock);
 631 }