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 1.29 2011/11/07 06:44:47 ed Exp $
  57  */
  58
  59 #include <sys/param.h>
  60 #include <sys/systm.h>
  61 #include <sys/kernel.h>
  62 #include <sys/module.h>
  63
  64 #include <sys/bio.h>
  65 #include <sys/bus.h>
  66 #include <sys/conf.h>
  67 #include <sys/stat.h>
  68
  69 #include <bus/cam/cam.h>
  70 #include <bus/cam/cam_ccb.h>
  71 #include <bus/cam/cam_sim.h>
  72 #include <bus/cam/cam_xpt.h>
  73 #include <bus/cam/cam_xpt_sim.h>
  74 #include <bus/cam/cam_debug.h>
  75 #include <bus/cam/scsi/scsi_all.h>
  76 #include <bus/cam/scsi/scsi_message.h>
  77
  78 #include <dev/raid/amr/amrreg.h>
  79 #include <dev/raid/amr/amrvar.h>
  80
  81 static int      amr_cam_probe(device_t dev);
  82 static int      amr_cam_attach(device_t dev);
  83 static int      amr_cam_detach(device_t dev);
  84 static void     amr_cam_action(struct cam_sim *sim, union ccb *ccb);
  85 static void     amr_cam_poll(struct cam_sim *sim);
  86 static void     amr_cam_complete(struct amr_command *ac);
  87 static int      amr_cam_command(struct amr_softc *sc, struct amr_command **acp);
  88
  89 static devclass_t       amr_pass_devclass;
  90
  91 static device_method_t  amr_pass_methods[] = {
  92         DEVMETHOD(device_probe,         amr_cam_probe),
  93         DEVMETHOD(device_attach,        amr_cam_attach),
  94         DEVMETHOD(device_detach,        amr_cam_detach),
  95         DEVMETHOD_END
  96 };
  97
  98 static driver_t amr_pass_driver = {
  99         "amrp",
 100         amr_pass_methods,
 101         0
 102 };
 103
 104 DRIVER_MODULE(amrp, amr, amr_pass_driver, amr_pass_devclass, NULL, NULL);
 105 MODULE_VERSION(amrp, 1);
 106 MODULE_DEPEND(amrp, amr, 1, 1, 1);
 107 MODULE_DEPEND(amrp, cam, 1, 1, 1);
 108
 109 /***********************************************************************
 110  * Enqueue/dequeue functions
 111  */
 112 static __inline void
 113 amr_enqueue_ccb(struct amr_softc *sc, union ccb *ccb)
 114 {
 115
 116         TAILQ_INSERT_TAIL(&sc->amr_cam_ccbq, &ccb->ccb_h, sim_links.tqe);
 117 }
 118
 119 static __inline void
 120 amr_requeue_ccb(struct amr_softc *sc, union ccb *ccb)
 121 {
 122
 123         TAILQ_INSERT_HEAD(&sc->amr_cam_ccbq, &ccb->ccb_h, sim_links.tqe);
 124 }
 125
 126 static __inline union ccb *
 127 amr_dequeue_ccb(struct amr_softc *sc)
 128 {
 129         union ccb       *ccb;
 130
 131         if ((ccb = (union ccb *)TAILQ_FIRST(&sc->amr_cam_ccbq)) != NULL)
 132                 TAILQ_REMOVE(&sc->amr_cam_ccbq, &ccb->ccb_h, sim_links.tqe);
 133         return(ccb);
 134 }
 135
 136 static int
 137 amr_cam_probe(device_t dev)
 138 {
 139         return (0);
 140 }
 141
 142 /********************************************************************************
 143  * Attach our 'real' SCSI channels to CAM
 144  */
 145 static int
 146 amr_cam_attach(device_t dev)
 147 {
 148         struct amr_softc *sc;
 149         struct cam_devq *devq;
 150         int chn, error;
 151
 152         sc = device_get_softc(dev);
 153
 154         /* initialise the ccb queue */
 155         TAILQ_INIT(&sc->amr_cam_ccbq);
 156
 157         /*
 158          * Allocate a devq for all our channels combined.  This should
 159          * allow for the maximum number of SCSI commands we will accept
 160          * at one time. Save the pointer in the softc so we can find it later
 161          * during detach.
 162          */
 163         if ((devq = cam_simq_alloc(AMR_MAX_SCSI_CMDS)) == NULL)
 164                 return(ENOMEM);
 165         sc->amr_cam_devq = devq;
 166
 167         /*
 168          * Iterate over our channels, registering them with CAM
 169          */
 170         for (chn = 0; chn < sc->amr_maxchan; chn++) {
 171
 172                 /* allocate a sim */
 173                 if ((sc->amr_cam_sim[chn] = cam_sim_alloc(amr_cam_action,
 174                     amr_cam_poll, "amr", sc, device_get_unit(sc->amr_dev),
 175                     &sc->amr_list_lock, 1, AMR_MAX_SCSI_CMDS, devq)) == NULL) {
 176                         cam_simq_release(devq);
 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         /* Now free the devq */
 222         if (sc->amr_cam_devq != NULL)
 223                 cam_simq_release(sc->amr_cam_devq);
 224
 225         return (0);
 226 }
 227
 228 /***********************************************************************
 229  ***********************************************************************
 230                         CAM passthrough interface
 231  ***********************************************************************
 232  ***********************************************************************/
 233
 234 /***********************************************************************
 235  * Handle a request for action from CAM
 236  */
 237 static void
 238 amr_cam_action(struct cam_sim *sim, union ccb *ccb)
 239 {
 240         struct amr_softc        *sc = cam_sim_softc(sim);
 241
 242         switch(ccb->ccb_h.func_code) {
 243
 244         /*
 245          * Perform SCSI I/O to a physical device.
 246          */
 247         case XPT_SCSI_IO:
 248         {
 249                 struct ccb_hdr          *ccbh = &ccb->ccb_h;
 250                 struct ccb_scsiio       *csio = &ccb->csio;
 251
 252                 /* Validate the CCB */
 253                 ccbh->status = CAM_REQ_INPROG;
 254
 255                 /* check the CDB length */
 256                 if (csio->cdb_len > AMR_MAX_EXTCDB_LEN)
 257                         ccbh->status = CAM_REQ_INVALID;
 258
 259                 if ((csio->cdb_len > AMR_MAX_CDB_LEN) &&
 260                     (sc->support_ext_cdb == 0))
 261                         ccbh->status = CAM_REQ_INVALID;
 262
 263                 /* check that the CDB pointer is not to a physical address */
 264                 if ((ccbh->flags & CAM_CDB_POINTER) &&
 265                     (ccbh->flags & CAM_CDB_PHYS))
 266                         ccbh->status = CAM_REQ_INVALID;
 267                 /*
 268                  * if there is data transfer, it must be to/from a virtual
 269                  * address
 270                  */
 271                 if ((ccbh->flags & CAM_DIR_MASK) != CAM_DIR_NONE) {
 272                         if (ccbh->flags & CAM_DATA_PHYS)
 273                                 /* we can't map it */
 274                                 ccbh->status = CAM_REQ_INVALID;
 275                         if (ccbh->flags & CAM_SCATTER_VALID)
 276                                 /* we want to do the s/g setup */
 277                                 ccbh->status = CAM_REQ_INVALID;
 278                 }
 279
 280                 /*
 281                  * If the command is to a LUN other than 0, fail it.
 282                  * This is probably incorrect, but during testing the
 283                  * firmware did not seem to respect the LUN field, and thus
 284                  * devices appear echoed.
 285                  */
 286                 if (csio->ccb_h.target_lun != 0)
 287                         ccbh->status = CAM_DEV_NOT_THERE;
 288
 289                 /* if we're happy with the request, queue it for attention */
 290                 if (ccbh->status == CAM_REQ_INPROG) {
 291
 292                         /* save the channel number in the ccb */
 293                         csio->ccb_h.sim_priv.entries[0].field= cam_sim_bus(sim);
 294
 295                         amr_enqueue_ccb(sc, ccb);
 296                         amr_startio(sc);
 297                         return;
 298                 }
 299                 break;
 300         }
 301
 302         case XPT_CALC_GEOMETRY:
 303         {
 304                 cam_calc_geometry(&ccb->ccg, /*extended*/1);
 305                 break;
 306         }
 307
 308         /*
 309          * Return path stats.  Some of these should probably be amended.
 310          */
 311         case XPT_PATH_INQ:
 312         {
 313                 struct ccb_pathinq        *cpi = & ccb->cpi;
 314
 315                 debug(3, "XPT_PATH_INQ");
 316                 cpi->version_num = 1;              /* XXX??? */
 317                 cpi->hba_inquiry = PI_SDTR_ABLE|PI_TAG_ABLE|PI_WIDE_16;
 318                 cpi->target_sprt = 0;
 319                 cpi->hba_misc = PIM_NOBUSRESET|PIM_SEQSCAN;
 320                 cpi->hba_eng_cnt = 0;
 321                 cpi->max_target = AMR_MAX_TARGETS;
 322                 cpi->max_lun = 0 /* AMR_MAX_LUNS*/;
 323                 cpi->initiator_id = 7;            /* XXX variable? */
 324                 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
 325                 strncpy(cpi->hba_vid, "LSI", HBA_IDLEN);
 326                 strncpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN);
 327                 cpi->unit_number = cam_sim_unit(sim);
 328                 cpi->bus_id = cam_sim_bus(sim);
 329                 cpi->base_transfer_speed = 132 * 1024;  /* XXX */
 330                 cpi->transport = XPORT_SPI;
 331                 cpi->transport_version = 2;
 332                 cpi->protocol = PROTO_SCSI;
 333                 cpi->protocol_version = SCSI_REV_2;
 334                 cpi->ccb_h.status = CAM_REQ_CMP;
 335
 336                 break;
 337         }
 338
 339         case XPT_RESET_BUS:
 340         {
 341                 struct ccb_pathinq      *cpi = & ccb->cpi;
 342
 343                 debug(1, "XPT_RESET_BUS");
 344                 cpi->ccb_h.status = CAM_REQ_CMP;
 345                 break;
 346         }
 347
 348         case XPT_RESET_DEV:
 349         {
 350                 debug(1, "XPT_RESET_DEV");
 351                 ccb->ccb_h.status = CAM_REQ_CMP;
 352                 break;
 353         }
 354
 355         case XPT_GET_TRAN_SETTINGS:
 356         {
 357                 struct ccb_trans_settings       *cts = &(ccb->cts);
 358
 359                 debug(3, "XPT_GET_TRAN_SETTINGS");
 360
 361                 struct ccb_trans_settings_scsi *scsi;
 362                 struct ccb_trans_settings_spi *spi;
 363
 364                 scsi = &cts->proto_specific.scsi;
 365                 spi = &cts->xport_specific.spi;
 366
 367                 cts->protocol = PROTO_SCSI;
 368                 cts->protocol_version = SCSI_REV_2;
 369                 cts->transport = XPORT_SPI;
 370                 cts->transport_version = 2;
 371
 372                 if (cts->type == CTS_TYPE_USER_SETTINGS) {
 373                         ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
 374                         break;
 375                 }
 376
 377                 spi->flags = CTS_SPI_FLAGS_DISC_ENB;
 378                 spi->bus_width = MSG_EXT_WDTR_BUS_32_BIT;
 379                 spi->sync_period = 6;   /* 40MHz how wide is this bus? */
 380                 spi->sync_offset = 31;  /* How to extract this from board? */
 381
 382                 spi->valid = CTS_SPI_VALID_SYNC_RATE
 383                         | CTS_SPI_VALID_SYNC_OFFSET
 384                         | CTS_SPI_VALID_BUS_WIDTH
 385                         | CTS_SPI_VALID_DISC;
 386                 scsi->valid = CTS_SCSI_VALID_TQ;
 387                 ccb->ccb_h.status = CAM_REQ_CMP;
 388                 break;
 389         }
 390
 391         case XPT_SET_TRAN_SETTINGS:
 392                 debug(3, "XPT_SET_TRAN_SETTINGS");
 393                 ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
 394                 break;
 395
 396
 397         /*
 398          * Reject anything else as unsupported.
 399          */
 400         default:
 401                 /* we can't do this */
 402                 ccb->ccb_h.status = CAM_REQ_INVALID;
 403                 break;
 404         }
 405
 406         KKASSERT(lockstatus(&sc->amr_list_lock, curthread) != 0);
 407         xpt_done(ccb);
 408 }
 409
 410 /***********************************************************************
 411  * Convert a CAM CCB off the top of the CCB queue to a passthrough SCSI
 412  * command.
 413  */
 414 static int
 415 amr_cam_command(struct amr_softc *sc, struct amr_command **acp)
 416 {
 417         struct amr_command              *ac;
 418         struct amr_passthrough          *ap;
 419         struct amr_ext_passthrough      *aep;
 420         struct ccb_scsiio               *csio;
 421         int                             bus, target, error;
 422
 423         error = 0;
 424         ac = NULL;
 425         ap = NULL;
 426         aep = NULL;
 427
 428         /* check to see if there is a ccb for us to work with */
 429         if ((csio = (struct ccb_scsiio *)amr_dequeue_ccb(sc)) == NULL)
 430                 goto out;
 431
 432         /* get bus/target, XXX validate against protected devices? */
 433         bus = csio->ccb_h.sim_priv.entries[0].field;
 434         target = csio->ccb_h.target_id;
 435
 436         /*
 437          * Build a passthrough command.
 438          */
 439
 440         /* construct command */
 441         if ((ac = amr_alloccmd(sc)) == NULL) {
 442                 error = ENOMEM;
 443                 goto out;
 444         }
 445
 446         /* construct passthrough */
 447         if (sc->support_ext_cdb ) {
 448                 aep = &ac->ac_ccb->ccb_epthru;
 449                 aep->ap_timeout = 2;
 450                 aep->ap_ars = 1;
 451                 aep->ap_request_sense_length = 14;
 452                 aep->ap_islogical = 0;
 453                 aep->ap_channel = bus;
 454                 aep->ap_scsi_id = target;
 455                 aep->ap_logical_drive_no = csio->ccb_h.target_lun;
 456                 aep->ap_cdb_length = csio->cdb_len;
 457                 aep->ap_data_transfer_length = csio->dxfer_len;
 458                 if (csio->ccb_h.flags & CAM_CDB_POINTER) {
 459                         bcopy(csio->cdb_io.cdb_ptr, aep->ap_cdb, csio->cdb_len);
 460                 } else {
 461                         bcopy(csio->cdb_io.cdb_bytes, aep->ap_cdb,
 462                             csio->cdb_len);
 463                 }
 464                 /*
 465                  * we leave the data s/g list and s/g count to the map routine
 466                  * later
 467                  */
 468
 469                 debug(2, " COMMAND %x/%d+%d to %d:%d:%d", aep->ap_cdb[0],
 470                     aep->ap_cdb_length, csio->dxfer_len, aep->ap_channel,
 471                     aep->ap_scsi_id, aep->ap_logical_drive_no);
 472
 473         } else {
 474                 ap = &ac->ac_ccb->ccb_pthru;
 475                 ap->ap_timeout = 0;
 476                 ap->ap_ars = 1;
 477                 ap->ap_request_sense_length = 14;
 478                 ap->ap_islogical = 0;
 479                 ap->ap_channel = bus;
 480                 ap->ap_scsi_id = target;
 481                 ap->ap_logical_drive_no = csio->ccb_h.target_lun;
 482                 ap->ap_cdb_length = csio->cdb_len;
 483                 ap->ap_data_transfer_length = csio->dxfer_len;
 484                 if (csio->ccb_h.flags & CAM_CDB_POINTER) {
 485                         bcopy(csio->cdb_io.cdb_ptr, ap->ap_cdb, csio->cdb_len);
 486                 } else {
 487                         bcopy(csio->cdb_io.cdb_bytes, ap->ap_cdb,
 488                             csio->cdb_len);
 489                 }
 490                 /*
 491                  * we leave the data s/g list and s/g count to the map routine
 492                  * later
 493                  */
 494
 495                 debug(2, " COMMAND %x/%d+%d to %d:%d:%d", ap->ap_cdb[0],
 496                     ap->ap_cdb_length, csio->dxfer_len, ap->ap_channel,
 497                     ap->ap_scsi_id, ap->ap_logical_drive_no);
 498         }
 499
 500         ac->ac_flags |= AMR_CMD_CCB;
 501
 502         ac->ac_data = csio->data_ptr;
 503         ac->ac_length = csio->dxfer_len;
 504         if ((csio->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN)
 505                 ac->ac_flags |= AMR_CMD_DATAIN;
 506         if ((csio->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_OUT)
 507                 ac->ac_flags |= AMR_CMD_DATAOUT;
 508
 509         ac->ac_private = csio;
 510         ac->ac_complete = amr_cam_complete;
 511         if ( sc->support_ext_cdb ) {
 512                 ac->ac_mailbox.mb_command = AMR_CMD_EXTPASS;
 513         } else {
 514                 ac->ac_mailbox.mb_command = AMR_CMD_PASS;
 515         }
 516
 517 out:
 518         if (error != 0) {
 519                 if (ac != NULL)
 520                         amr_releasecmd(ac);
 521                 if (csio != NULL)
 522                         /* put it back and try again later */
 523                         amr_requeue_ccb(sc, (union ccb *)csio);
 524         }
 525         *acp = ac;
 526         return(error);
 527 }
 528
 529 /***********************************************************************
 530  * Check for interrupt status
 531  */
 532 static void
 533 amr_cam_poll(struct cam_sim *sim)
 534 {
 535
 536         amr_done(cam_sim_softc(sim));
 537 }
 538
 539  /**********************************************************************
 540  * Handle completion of a command submitted via CAM.
 541  */
 542 static void
 543 amr_cam_complete(struct amr_command *ac)
 544 {
 545         struct amr_passthrough          *ap;
 546         struct amr_ext_passthrough      *aep;
 547         struct ccb_scsiio               *csio;
 548         struct scsi_inquiry_data        *inq;
 549         int                             scsi_status, cdb0;
 550 #ifdef AMR_DEBUG
 551         char                            hexstr[HEX_NCPYLEN(16)];
 552 #endif
 553
 554         ap = &ac->ac_ccb->ccb_pthru;
 555         aep = &ac->ac_ccb->ccb_epthru;
 556         csio = (struct ccb_scsiio *)ac->ac_private;
 557         inq = (struct scsi_inquiry_data *)csio->data_ptr;
 558
 559         if (ac->ac_mailbox.mb_command == AMR_CMD_EXTPASS)
 560                 scsi_status = aep->ap_scsi_status;
 561         else
 562                 scsi_status = ap->ap_scsi_status;
 563         debug(1, "status 0x%x  AP scsi_status 0x%x", ac->ac_status,
 564             scsi_status);
 565
 566         /* Make sure the status is sane */
 567         if ((ac->ac_status != AMR_STATUS_SUCCESS) && (scsi_status == 0)) {
 568                 csio->ccb_h.status = CAM_REQ_CMP_ERR;
 569                 goto out;
 570         }
 571
 572         /*
 573          * Hide disks from CAM so that they're not picked up and treated as
 574          * 'normal' disks.
 575          *
 576          * If the configuration provides a mechanism to mark a disk a "not
 577          * managed", we could add handling for that to allow disks to be
 578          * selectively visible.
 579          */
 580
 581         /* handle passthrough SCSI status */
 582         switch(scsi_status) {
 583         case 0: /* completed OK */
 584                 if (ac->ac_mailbox.mb_command == AMR_CMD_EXTPASS)
 585                         cdb0 = aep->ap_cdb[0];
 586                 else
 587                         cdb0 = ap->ap_cdb[0];
 588                 if ((cdb0 == INQUIRY) && (SID_TYPE(inq) == T_DIRECT))
 589                         inq->device = (inq->device & 0xe0) | T_NODEVICE;
 590                 csio->ccb_h.status = CAM_REQ_CMP;
 591                 break;
 592
 593         case 0x02:
 594                 csio->ccb_h.status = CAM_SCSI_STATUS_ERROR;
 595                 csio->scsi_status = SCSI_STATUS_CHECK_COND;
 596                 if (ac->ac_mailbox.mb_command == AMR_CMD_EXTPASS)
 597                         bcopy(aep->ap_request_sense_area, &csio->sense_data,
 598                             AMR_MAX_REQ_SENSE_LEN);
 599                 else
 600                         bcopy(ap->ap_request_sense_area, &csio->sense_data,
 601                             AMR_MAX_REQ_SENSE_LEN);
 602                 csio->sense_len = AMR_MAX_REQ_SENSE_LEN;
 603                 csio->ccb_h.status |= CAM_AUTOSNS_VALID;
 604                 break;
 605
 606         case 0x08:
 607                 csio->ccb_h.status = CAM_SCSI_BUSY;
 608                 break;
 609
 610         case 0xf0:
 611         case 0xf4:
 612         default:
 613                 /*
 614                  * Non-zero LUNs are already filtered, so there's no need
 615                  * to return CAM_DEV_NOT_THERE.
 616                  */
 617                 csio->ccb_h.status = CAM_SEL_TIMEOUT;
 618                 break;
 619         }
 620
 621 out:
 622         if ((csio->ccb_h.flags & CAM_DIR_MASK) != CAM_DIR_NONE)
 623                 debug(2, "%s\n", hexncpy(csio->data_ptr, imin(csio->dxfer_len, 16),
 624                         hexstr, HEX_NCPYLEN(imin(csio->dxfer_len, 16)), " "));
 625
 626         lockmgr(&ac->ac_sc->amr_list_lock, LK_EXCLUSIVE);
 627         xpt_done((union ccb *)csio);
 628         amr_releasecmd(ac);
 629         lockmgr(&ac->ac_sc->amr_list_lock, LK_RELEASE);
 630 }