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