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, NULL, NULL);
 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                         cam_simq_release(devq);
 178                         device_printf(sc->amr_dev, "CAM SIM attach failed\n");
 179                         return(ENOMEM);
 180                 }
 181
 182                 /* register the bus ID so we can get it later */
 183                 lockmgr(&sc->amr_list_lock, LK_EXCLUSIVE);
 184                 error = xpt_bus_register(sc->amr_cam_sim[chn], chn);
 185                 lockmgr(&sc->amr_list_lock, LK_RELEASE);
 186                 if (error) {
 187                         device_printf(sc->amr_dev,
 188                             "CAM XPT bus registration failed\n");
 189                         return(ENXIO);
 190                 }
 191         }
 192         /*
 193          * XXX we should scan the config and work out which devices are
 194          * actually protected.
 195          */
 196         sc->amr_cam_command = amr_cam_command;
 197         return(0);
 198 }
 199
 200 /********************************************************************************
 201  * Disconnect ourselves from CAM
 202  */
 203 static int
 204 amr_cam_detach(device_t dev)
 205 {
 206         struct amr_softc *sc;
 207         int             chn;
 208
 209         sc = device_get_softc(dev);
 210         lockmgr(&sc->amr_list_lock, LK_EXCLUSIVE);
 211         for (chn = 0; chn < sc->amr_maxchan; chn++) {
 212                 /*
 213                  * If a sim was allocated for this channel, free it
 214                  */
 215                 if (sc->amr_cam_sim[chn] != NULL) {
 216                         xpt_bus_deregister(cam_sim_path(sc->amr_cam_sim[chn]));
 217                         cam_sim_free(sc->amr_cam_sim[chn]);
 218                 }
 219         }
 220         lockmgr(&sc->amr_list_lock, LK_RELEASE);
 221
 222         /* Now free the devq */
 223         if (sc->amr_cam_devq != NULL)
 224                 cam_simq_release(sc->amr_cam_devq);
 225
 226         return (0);
 227 }
 228
 229 /***********************************************************************
 230  ***********************************************************************
 231                         CAM passthrough interface
 232  ***********************************************************************
 233  ***********************************************************************/
 234
 235 /***********************************************************************
 236  * Handle a request for action from CAM
 237  */
 238 static void
 239 amr_cam_action(struct cam_sim *sim, union ccb *ccb)
 240 {
 241         struct amr_softc        *sc = cam_sim_softc(sim);
 242
 243         switch(ccb->ccb_h.func_code) {
 244
 245         /*
 246          * Perform SCSI I/O to a physical device.
 247          */
 248         case XPT_SCSI_IO:
 249         {
 250                 struct ccb_hdr          *ccbh = &ccb->ccb_h;
 251                 struct ccb_scsiio       *csio = &ccb->csio;
 252
 253                 /* Validate the CCB */
 254                 ccbh->status = CAM_REQ_INPROG;
 255
 256                 /* check the CDB length */
 257                 if (csio->cdb_len > AMR_MAX_EXTCDB_LEN)
 258                         ccbh->status = CAM_REQ_INVALID;
 259
 260                 if ((csio->cdb_len > AMR_MAX_CDB_LEN) &&
 261                     (sc->support_ext_cdb == 0))
 262                         ccbh->status = CAM_REQ_INVALID;
 263
 264                 /* check that the CDB pointer is not to a physical address */
 265                 if ((ccbh->flags & CAM_CDB_POINTER) &&
 266                     (ccbh->flags & CAM_CDB_PHYS))
 267                         ccbh->status = CAM_REQ_INVALID;
 268                 /*
 269                  * if there is data transfer, it must be to/from a virtual
 270                  * address
 271                  */
 272                 if ((ccbh->flags & CAM_DIR_MASK) != CAM_DIR_NONE) {
 273                         if (ccbh->flags & CAM_DATA_PHYS)
 274                                 /* we can't map it */
 275                                 ccbh->status = CAM_REQ_INVALID;
 276                         if (ccbh->flags & CAM_SCATTER_VALID)
 277                                 /* we want to do the s/g setup */
 278                                 ccbh->status = CAM_REQ_INVALID;
 279                 }
 280
 281                 /*
 282                  * If the command is to a LUN other than 0, fail it.
 283                  * This is probably incorrect, but during testing the
 284                  * firmware did not seem to respect the LUN field, and thus
 285                  * devices appear echoed.
 286                  */
 287                 if (csio->ccb_h.target_lun != 0)
 288                         ccbh->status = CAM_DEV_NOT_THERE;
 289
 290                 /* if we're happy with the request, queue it for attention */
 291                 if (ccbh->status == CAM_REQ_INPROG) {
 292
 293                         /* save the channel number in the ccb */
 294                         csio->ccb_h.sim_priv.entries[0].field= cam_sim_bus(sim);
 295
 296                         amr_enqueue_ccb(sc, ccb);
 297                         amr_startio(sc);
 298                         return;
 299                 }
 300                 break;
 301         }
 302
 303         case XPT_CALC_GEOMETRY:
 304         {
 305                 cam_calc_geometry(&ccb->ccg, /*extended*/1);
 306                 break;
 307         }
 308
 309         /*
 310          * Return path stats.  Some of these should probably be amended.
 311          */
 312         case XPT_PATH_INQ:
 313         {
 314                 struct ccb_pathinq        *cpi = & ccb->cpi;
 315
 316                 debug(3, "XPT_PATH_INQ");
 317                 cpi->version_num = 1;              /* XXX??? */
 318                 cpi->hba_inquiry = PI_SDTR_ABLE|PI_TAG_ABLE|PI_WIDE_16;
 319                 cpi->target_sprt = 0;
 320                 cpi->hba_misc = PIM_NOBUSRESET|PIM_SEQSCAN;
 321                 cpi->hba_eng_cnt = 0;
 322                 cpi->max_target = AMR_MAX_TARGETS;
 323                 cpi->max_lun = 0 /* AMR_MAX_LUNS*/;
 324                 cpi->initiator_id = 7;            /* XXX variable? */
 325                 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
 326                 strncpy(cpi->hba_vid, "LSI", HBA_IDLEN);
 327                 strncpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN);
 328                 cpi->unit_number = cam_sim_unit(sim);
 329                 cpi->bus_id = cam_sim_bus(sim);
 330                 cpi->base_transfer_speed = 132 * 1024;  /* XXX */
 331                 cpi->transport = XPORT_SPI;
 332                 cpi->transport_version = 2;
 333                 cpi->protocol = PROTO_SCSI;
 334                 cpi->protocol_version = SCSI_REV_2;
 335                 cpi->ccb_h.status = CAM_REQ_CMP;
 336
 337                 break;
 338         }
 339
 340         case XPT_RESET_BUS:
 341         {
 342                 struct ccb_pathinq      *cpi = & ccb->cpi;
 343
 344                 debug(1, "XPT_RESET_BUS");
 345                 cpi->ccb_h.status = CAM_REQ_CMP;
 346                 break;
 347         }
 348
 349         case XPT_RESET_DEV:
 350         {
 351                 debug(1, "XPT_RESET_DEV");
 352                 ccb->ccb_h.status = CAM_REQ_CMP;
 353                 break;
 354         }
 355
 356         case XPT_GET_TRAN_SETTINGS:
 357         {
 358                 struct ccb_trans_settings       *cts = &(ccb->cts);
 359
 360                 debug(3, "XPT_GET_TRAN_SETTINGS");
 361
 362                 struct ccb_trans_settings_scsi *scsi;
 363                 struct ccb_trans_settings_spi *spi;
 364
 365                 scsi = &cts->proto_specific.scsi;
 366                 spi = &cts->xport_specific.spi;
 367
 368                 cts->protocol = PROTO_SCSI;
 369                 cts->protocol_version = SCSI_REV_2;
 370                 cts->transport = XPORT_SPI;
 371                 cts->transport_version = 2;
 372
 373                 if (cts->type == CTS_TYPE_USER_SETTINGS) {
 374                         ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
 375                         break;
 376                 }
 377
 378                 spi->flags = CTS_SPI_FLAGS_DISC_ENB;
 379                 spi->bus_width = MSG_EXT_WDTR_BUS_32_BIT;
 380                 spi->sync_period = 6;   /* 40MHz how wide is this bus? */
 381                 spi->sync_offset = 31;  /* How to extract this from board? */
 382
 383                 spi->valid = CTS_SPI_VALID_SYNC_RATE
 384                         | CTS_SPI_VALID_SYNC_OFFSET
 385                         | CTS_SPI_VALID_BUS_WIDTH
 386                         | CTS_SPI_VALID_DISC;
 387                 scsi->valid = CTS_SCSI_VALID_TQ;
 388                 ccb->ccb_h.status = CAM_REQ_CMP;
 389                 break;
 390         }
 391
 392         case XPT_SET_TRAN_SETTINGS:
 393                 debug(3, "XPT_SET_TRAN_SETTINGS");
 394                 ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
 395                 break;
 396
 397
 398         /*
 399          * Reject anything else as unsupported.
 400          */
 401         default:
 402                 /* we can't do this */
 403                 ccb->ccb_h.status = CAM_REQ_INVALID;
 404                 break;
 405         }
 406
 407         KKASSERT(lockstatus(&sc->amr_list_lock, curthread) != 0);
 408         xpt_done(ccb);
 409 }
 410
 411 /***********************************************************************
 412  * Convert a CAM CCB off the top of the CCB queue to a passthrough SCSI
 413  * command.
 414  */
 415 static int
 416 amr_cam_command(struct amr_softc *sc, struct amr_command **acp)
 417 {
 418         struct amr_command              *ac;
 419         struct amr_passthrough          *ap;
 420         struct amr_ext_passthrough      *aep;
 421         struct ccb_scsiio               *csio;
 422         int                             bus, target, error;
 423
 424         error = 0;
 425         ac = NULL;
 426         ap = NULL;
 427         aep = NULL;
 428
 429         /* check to see if there is a ccb for us to work with */
 430         if ((csio = (struct ccb_scsiio *)amr_dequeue_ccb(sc)) == NULL)
 431                 goto out;
 432
 433         /* get bus/target, XXX validate against protected devices? */
 434         bus = csio->ccb_h.sim_priv.entries[0].field;
 435         target = csio->ccb_h.target_id;
 436
 437         /*
 438          * Build a passthrough command.
 439          */
 440
 441         /* construct command */
 442         if ((ac = amr_alloccmd(sc)) == NULL) {
 443                 error = ENOMEM;
 444                 goto out;
 445         }
 446
 447         /* construct passthrough */
 448         if (sc->support_ext_cdb ) {
 449                 aep = &ac->ac_ccb->ccb_epthru;
 450                 aep->ap_timeout = 2;
 451                 aep->ap_ars = 1;
 452                 aep->ap_request_sense_length = 14;
 453                 aep->ap_islogical = 0;
 454                 aep->ap_channel = bus;
 455                 aep->ap_scsi_id = target;
 456                 aep->ap_logical_drive_no = csio->ccb_h.target_lun;
 457                 aep->ap_cdb_length = csio->cdb_len;
 458                 aep->ap_data_transfer_length = csio->dxfer_len;
 459                 if (csio->ccb_h.flags & CAM_CDB_POINTER) {
 460                         bcopy(csio->cdb_io.cdb_ptr, aep->ap_cdb, csio->cdb_len);
 461                 } else {
 462                         bcopy(csio->cdb_io.cdb_bytes, aep->ap_cdb,
 463                             csio->cdb_len);
 464                 }
 465                 /*
 466                  * we leave the data s/g list and s/g count to the map routine
 467                  * later
 468                  */
 469
 470                 debug(2, " COMMAND %x/%d+%d to %d:%d:%d", aep->ap_cdb[0],
 471                     aep->ap_cdb_length, csio->dxfer_len, aep->ap_channel,
 472                     aep->ap_scsi_id, aep->ap_logical_drive_no);
 473
 474         } else {
 475                 ap = &ac->ac_ccb->ccb_pthru;
 476                 ap->ap_timeout = 0;
 477                 ap->ap_ars = 1;
 478                 ap->ap_request_sense_length = 14;
 479                 ap->ap_islogical = 0;
 480                 ap->ap_channel = bus;
 481                 ap->ap_scsi_id = target;
 482                 ap->ap_logical_drive_no = csio->ccb_h.target_lun;
 483                 ap->ap_cdb_length = csio->cdb_len;
 484                 ap->ap_data_transfer_length = csio->dxfer_len;
 485                 if (csio->ccb_h.flags & CAM_CDB_POINTER) {
 486                         bcopy(csio->cdb_io.cdb_ptr, ap->ap_cdb, csio->cdb_len);
 487                 } else {
 488                         bcopy(csio->cdb_io.cdb_bytes, ap->ap_cdb,
 489                             csio->cdb_len);
 490                 }
 491                 /*
 492                  * we leave the data s/g list and s/g count to the map routine
 493                  * later
 494                  */
 495
 496                 debug(2, " COMMAND %x/%d+%d to %d:%d:%d", ap->ap_cdb[0],
 497                     ap->ap_cdb_length, csio->dxfer_len, ap->ap_channel,
 498                     ap->ap_scsi_id, ap->ap_logical_drive_no);
 499         }
 500
 501         ac->ac_flags |= AMR_CMD_CCB;
 502
 503         ac->ac_data = csio->data_ptr;
 504         ac->ac_length = csio->dxfer_len;
 505         if ((csio->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN)
 506                 ac->ac_flags |= AMR_CMD_DATAIN;
 507         if ((csio->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_OUT)
 508                 ac->ac_flags |= AMR_CMD_DATAOUT;
 509
 510         ac->ac_private = csio;
 511         ac->ac_complete = amr_cam_complete;
 512         if ( sc->support_ext_cdb ) {
 513                 ac->ac_mailbox.mb_command = AMR_CMD_EXTPASS;
 514         } else {
 515                 ac->ac_mailbox.mb_command = AMR_CMD_PASS;
 516         }
 517
 518 out:
 519         if (error != 0) {
 520                 if (ac != NULL)
 521                         amr_releasecmd(ac);
 522                 if (csio != NULL)
 523                         /* put it back and try again later */
 524                         amr_requeue_ccb(sc, (union ccb *)csio);
 525         }
 526         *acp = ac;
 527         return(error);
 528 }
 529
 530 /***********************************************************************
 531  * Check for interrupt status
 532  */
 533 static void
 534 amr_cam_poll(struct cam_sim *sim)
 535 {
 536
 537         amr_done(cam_sim_softc(sim));
 538 }
 539
 540  /**********************************************************************
 541  * Handle completion of a command submitted via CAM.
 542  */
 543 static void
 544 amr_cam_complete(struct amr_command *ac)
 545 {
 546         struct amr_passthrough          *ap;
 547         struct amr_ext_passthrough      *aep;
 548         struct ccb_scsiio               *csio;
 549         struct scsi_inquiry_data        *inq;
 550         int                             scsi_status, cdb0;
 551
 552         ap = &ac->ac_ccb->ccb_pthru;
 553         aep = &ac->ac_ccb->ccb_epthru;
 554         csio = (struct ccb_scsiio *)ac->ac_private;
 555         inq = (struct scsi_inquiry_data *)csio->data_ptr;
 556
 557         if (ac->ac_mailbox.mb_command == AMR_CMD_EXTPASS)
 558                 scsi_status = aep->ap_scsi_status;
 559         else
 560                 scsi_status = ap->ap_scsi_status;
 561         debug(1, "status 0x%x  AP scsi_status 0x%x", ac->ac_status,
 562             scsi_status);
 563
 564         /* Make sure the status is sane */
 565         if ((ac->ac_status != AMR_STATUS_SUCCESS) && (scsi_status == 0)) {
 566                 csio->ccb_h.status = CAM_REQ_CMP_ERR;
 567                 goto out;
 568         }
 569
 570         /*
 571          * Hide disks from CAM so that they're not picked up and treated as
 572          * 'normal' disks.
 573          *
 574          * If the configuration provides a mechanism to mark a disk a "not
 575          * managed", we could add handling for that to allow disks to be
 576          * selectively visible.
 577          */
 578
 579         /* handle passthrough SCSI status */
 580         switch(scsi_status) {
 581         case 0: /* completed OK */
 582                 if (ac->ac_mailbox.mb_command == AMR_CMD_EXTPASS)
 583                         cdb0 = aep->ap_cdb[0];
 584                 else
 585                         cdb0 = ap->ap_cdb[0];
 586                 if ((cdb0 == INQUIRY) && (SID_TYPE(inq) == T_DIRECT))
 587                         inq->device = (inq->device & 0xe0) | T_NODEVICE;
 588                 csio->ccb_h.status = CAM_REQ_CMP;
 589                 break;
 590
 591         case 0x02:
 592                 csio->ccb_h.status = CAM_SCSI_STATUS_ERROR;
 593                 csio->scsi_status = SCSI_STATUS_CHECK_COND;
 594                 if (ac->ac_mailbox.mb_command == AMR_CMD_EXTPASS)
 595                         bcopy(aep->ap_request_sense_area, &csio->sense_data,
 596                             AMR_MAX_REQ_SENSE_LEN);
 597                 else
 598                         bcopy(ap->ap_request_sense_area, &csio->sense_data,
 599                             AMR_MAX_REQ_SENSE_LEN);
 600                 csio->sense_len = AMR_MAX_REQ_SENSE_LEN;
 601                 csio->ccb_h.status |= CAM_AUTOSNS_VALID;
 602                 break;
 603
 604         case 0x08:
 605                 csio->ccb_h.status = CAM_SCSI_BUSY;
 606                 break;
 607
 608         case 0xf0:
 609         case 0xf4:
 610         default:
 611                 /*
 612                  * Non-zero LUNs are already filtered, so there's no need
 613                  * to return CAM_DEV_NOT_THERE.
 614                  */
 615                 csio->ccb_h.status = CAM_SEL_TIMEOUT;
 616                 break;
 617         }
 618
 619 out:
 620         if ((csio->ccb_h.flags & CAM_DIR_MASK) != CAM_DIR_NONE)
 621                 debug(2, "%*D\n", imin(csio->dxfer_len, 16), csio->data_ptr,
 622                     " ");
 623
 624         lockmgr(&ac->ac_sc->amr_list_lock, LK_EXCLUSIVE);
 625         xpt_done((union ccb *)csio);
 626         amr_releasecmd(ac);
 627         lockmgr(&ac->ac_sc->amr_list_lock, LK_RELEASE);
 628 }