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/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         DEVMETHOD_END
  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_VERSION(amrp, 1);
 107 MODULE_DEPEND(amrp, amr, 1, 1, 1);
 108 MODULE_DEPEND(amrp, cam, 1, 1, 1);
 109
 110 static MALLOC_DEFINE(M_AMRCAM, "amrcam", "AMR CAM memory");
 111
 112 /***********************************************************************
 113  * Enqueue/dequeue functions
 114  */
 115 static __inline void
 116 amr_enqueue_ccb(struct amr_softc *sc, union ccb *ccb)
 117 {
 118
 119         TAILQ_INSERT_TAIL(&sc->amr_cam_ccbq, &ccb->ccb_h, sim_links.tqe);
 120 }
 121
 122 static __inline void
 123 amr_requeue_ccb(struct amr_softc *sc, union ccb *ccb)
 124 {
 125
 126         TAILQ_INSERT_HEAD(&sc->amr_cam_ccbq, &ccb->ccb_h, sim_links.tqe);
 127 }
 128
 129 static __inline union ccb *
 130 amr_dequeue_ccb(struct amr_softc *sc)
 131 {
 132         union ccb       *ccb;
 133
 134         if ((ccb = (union ccb *)TAILQ_FIRST(&sc->amr_cam_ccbq)) != NULL)
 135                 TAILQ_REMOVE(&sc->amr_cam_ccbq, &ccb->ccb_h, sim_links.tqe);
 136         return(ccb);
 137 }
 138
 139 static int
 140 amr_cam_probe(device_t dev)
 141 {
 142         return (0);
 143 }
 144
 145 /********************************************************************************
 146  * Attach our 'real' SCSI channels to CAM
 147  */
 148 static int
 149 amr_cam_attach(device_t dev)
 150 {
 151         struct amr_softc *sc;
 152         struct cam_devq *devq;
 153         int chn, error;
 154
 155         sc = device_get_softc(dev);
 156
 157         /* initialise the ccb queue */
 158         TAILQ_INIT(&sc->amr_cam_ccbq);
 159
 160         /*
 161          * Allocate a devq for all our channels combined.  This should
 162          * allow for the maximum number of SCSI commands we will accept
 163          * at one time. Save the pointer in the softc so we can find it later
 164          * during detach.
 165          */
 166         if ((devq = cam_simq_alloc(AMR_MAX_SCSI_CMDS)) == NULL)
 167                 return(ENOMEM);
 168         sc->amr_cam_devq = devq;
 169
 170         /*
 171          * Iterate over our channels, registering them with CAM
 172          */
 173         for (chn = 0; chn < sc->amr_maxchan; chn++) {
 174
 175                 /* allocate a sim */
 176                 if ((sc->amr_cam_sim[chn] = cam_sim_alloc(amr_cam_action,
 177                     amr_cam_poll, "amr", sc, device_get_unit(sc->amr_dev),
 178                     &sc->amr_list_lock, 1, AMR_MAX_SCSI_CMDS, devq)) == NULL) {
 179                         cam_simq_release(devq);
 180                         device_printf(sc->amr_dev, "CAM SIM attach failed\n");
 181                         return(ENOMEM);
 182                 }
 183
 184                 /* register the bus ID so we can get it later */
 185                 lockmgr(&sc->amr_list_lock, LK_EXCLUSIVE);
 186                 error = xpt_bus_register(sc->amr_cam_sim[chn], chn);
 187                 lockmgr(&sc->amr_list_lock, LK_RELEASE);
 188                 if (error) {
 189                         device_printf(sc->amr_dev,
 190                             "CAM XPT bus registration failed\n");
 191                         return(ENXIO);
 192                 }
 193         }
 194         /*
 195          * XXX we should scan the config and work out which devices are
 196          * actually protected.
 197          */
 198         sc->amr_cam_command = amr_cam_command;
 199         return(0);
 200 }
 201
 202 /********************************************************************************
 203  * Disconnect ourselves from CAM
 204  */
 205 static int
 206 amr_cam_detach(device_t dev)
 207 {
 208         struct amr_softc *sc;
 209         int             chn;
 210
 211         sc = device_get_softc(dev);
 212         lockmgr(&sc->amr_list_lock, LK_EXCLUSIVE);
 213         for (chn = 0; chn < sc->amr_maxchan; chn++) {
 214                 /*
 215                  * If a sim was allocated for this channel, free it
 216                  */
 217                 if (sc->amr_cam_sim[chn] != NULL) {
 218                         xpt_bus_deregister(cam_sim_path(sc->amr_cam_sim[chn]));
 219                         cam_sim_free(sc->amr_cam_sim[chn]);
 220                 }
 221         }
 222         lockmgr(&sc->amr_list_lock, LK_RELEASE);
 223
 224         /* Now free the devq */
 225         if (sc->amr_cam_devq != NULL)
 226                 cam_simq_release(sc->amr_cam_devq);
 227
 228         return (0);
 229 }
 230
 231 /***********************************************************************
 232  ***********************************************************************
 233                         CAM passthrough interface
 234  ***********************************************************************
 235  ***********************************************************************/
 236
 237 /***********************************************************************
 238  * Handle a request for action from CAM
 239  */
 240 static void
 241 amr_cam_action(struct cam_sim *sim, union ccb *ccb)
 242 {
 243         struct amr_softc        *sc = cam_sim_softc(sim);
 244
 245         switch(ccb->ccb_h.func_code) {
 246
 247         /*
 248          * Perform SCSI I/O to a physical device.
 249          */
 250         case XPT_SCSI_IO:
 251         {
 252                 struct ccb_hdr          *ccbh = &ccb->ccb_h;
 253                 struct ccb_scsiio       *csio = &ccb->csio;
 254
 255                 /* Validate the CCB */
 256                 ccbh->status = CAM_REQ_INPROG;
 257
 258                 /* check the CDB length */
 259                 if (csio->cdb_len > AMR_MAX_EXTCDB_LEN)
 260                         ccbh->status = CAM_REQ_INVALID;
 261
 262                 if ((csio->cdb_len > AMR_MAX_CDB_LEN) &&
 263                     (sc->support_ext_cdb == 0))
 264                         ccbh->status = CAM_REQ_INVALID;
 265
 266                 /* check that the CDB pointer is not to a physical address */
 267                 if ((ccbh->flags & CAM_CDB_POINTER) &&
 268                     (ccbh->flags & CAM_CDB_PHYS))
 269                         ccbh->status = CAM_REQ_INVALID;
 270                 /*
 271                  * if there is data transfer, it must be to/from a virtual
 272                  * address
 273                  */
 274                 if ((ccbh->flags & CAM_DIR_MASK) != CAM_DIR_NONE) {
 275                         if (ccbh->flags & CAM_DATA_PHYS)
 276                                 /* we can't map it */
 277                                 ccbh->status = CAM_REQ_INVALID;
 278                         if (ccbh->flags & CAM_SCATTER_VALID)
 279                                 /* we want to do the s/g setup */
 280                                 ccbh->status = CAM_REQ_INVALID;
 281                 }
 282
 283                 /*
 284                  * If the command is to a LUN other than 0, fail it.
 285                  * This is probably incorrect, but during testing the
 286                  * firmware did not seem to respect the LUN field, and thus
 287                  * devices appear echoed.
 288                  */
 289                 if (csio->ccb_h.target_lun != 0)
 290                         ccbh->status = CAM_DEV_NOT_THERE;
 291
 292                 /* if we're happy with the request, queue it for attention */
 293                 if (ccbh->status == CAM_REQ_INPROG) {
 294
 295                         /* save the channel number in the ccb */
 296                         csio->ccb_h.sim_priv.entries[0].field= cam_sim_bus(sim);
 297
 298                         amr_enqueue_ccb(sc, ccb);
 299                         amr_startio(sc);
 300                         return;
 301                 }
 302                 break;
 303         }
 304
 305         case XPT_CALC_GEOMETRY:
 306         {
 307                 cam_calc_geometry(&ccb->ccg, /*extended*/1);
 308                 break;
 309         }
 310
 311         /*
 312          * Return path stats.  Some of these should probably be amended.
 313          */
 314         case XPT_PATH_INQ:
 315         {
 316                 struct ccb_pathinq        *cpi = & ccb->cpi;
 317
 318                 debug(3, "XPT_PATH_INQ");
 319                 cpi->version_num = 1;              /* XXX??? */
 320                 cpi->hba_inquiry = PI_SDTR_ABLE|PI_TAG_ABLE|PI_WIDE_16;
 321                 cpi->target_sprt = 0;
 322                 cpi->hba_misc = PIM_NOBUSRESET|PIM_SEQSCAN;
 323                 cpi->hba_eng_cnt = 0;
 324                 cpi->max_target = AMR_MAX_TARGETS;
 325                 cpi->max_lun = 0 /* AMR_MAX_LUNS*/;
 326                 cpi->initiator_id = 7;            /* XXX variable? */
 327                 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
 328                 strncpy(cpi->hba_vid, "LSI", HBA_IDLEN);
 329                 strncpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN);
 330                 cpi->unit_number = cam_sim_unit(sim);
 331                 cpi->bus_id = cam_sim_bus(sim);
 332                 cpi->base_transfer_speed = 132 * 1024;  /* XXX */
 333                 cpi->transport = XPORT_SPI;
 334                 cpi->transport_version = 2;
 335                 cpi->protocol = PROTO_SCSI;
 336                 cpi->protocol_version = SCSI_REV_2;
 337                 cpi->ccb_h.status = CAM_REQ_CMP;
 338
 339                 break;
 340         }
 341
 342         case XPT_RESET_BUS:
 343         {
 344                 struct ccb_pathinq      *cpi = & ccb->cpi;
 345
 346                 debug(1, "XPT_RESET_BUS");
 347                 cpi->ccb_h.status = CAM_REQ_CMP;
 348                 break;
 349         }
 350
 351         case XPT_RESET_DEV:
 352         {
 353                 debug(1, "XPT_RESET_DEV");
 354                 ccb->ccb_h.status = CAM_REQ_CMP;
 355                 break;
 356         }
 357
 358         case XPT_GET_TRAN_SETTINGS:
 359         {
 360                 struct ccb_trans_settings       *cts = &(ccb->cts);
 361
 362                 debug(3, "XPT_GET_TRAN_SETTINGS");
 363
 364                 struct ccb_trans_settings_scsi *scsi;
 365                 struct ccb_trans_settings_spi *spi;
 366
 367                 scsi = &cts->proto_specific.scsi;
 368                 spi = &cts->xport_specific.spi;
 369
 370                 cts->protocol = PROTO_SCSI;
 371                 cts->protocol_version = SCSI_REV_2;
 372                 cts->transport = XPORT_SPI;
 373                 cts->transport_version = 2;
 374
 375                 if (cts->type == CTS_TYPE_USER_SETTINGS) {
 376                         ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
 377                         break;
 378                 }
 379
 380                 spi->flags = CTS_SPI_FLAGS_DISC_ENB;
 381                 spi->bus_width = MSG_EXT_WDTR_BUS_32_BIT;
 382                 spi->sync_period = 6;   /* 40MHz how wide is this bus? */
 383                 spi->sync_offset = 31;  /* How to extract this from board? */
 384
 385                 spi->valid = CTS_SPI_VALID_SYNC_RATE
 386                         | CTS_SPI_VALID_SYNC_OFFSET
 387                         | CTS_SPI_VALID_BUS_WIDTH
 388                         | CTS_SPI_VALID_DISC;
 389                 scsi->valid = CTS_SCSI_VALID_TQ;
 390                 ccb->ccb_h.status = CAM_REQ_CMP;
 391                 break;
 392         }
 393
 394         case XPT_SET_TRAN_SETTINGS:
 395                 debug(3, "XPT_SET_TRAN_SETTINGS");
 396                 ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
 397                 break;
 398
 399
 400         /*
 401          * Reject anything else as unsupported.
 402          */
 403         default:
 404                 /* we can't do this */
 405                 ccb->ccb_h.status = CAM_REQ_INVALID;
 406                 break;
 407         }
 408
 409         KKASSERT(lockstatus(&sc->amr_list_lock, curthread) != 0);
 410         xpt_done(ccb);
 411 }
 412
 413 /***********************************************************************
 414  * Convert a CAM CCB off the top of the CCB queue to a passthrough SCSI
 415  * command.
 416  */
 417 static int
 418 amr_cam_command(struct amr_softc *sc, struct amr_command **acp)
 419 {
 420         struct amr_command              *ac;
 421         struct amr_passthrough          *ap;
 422         struct amr_ext_passthrough      *aep;
 423         struct ccb_scsiio               *csio;
 424         int                             bus, target, error;
 425
 426         error = 0;
 427         ac = NULL;
 428         ap = NULL;
 429         aep = NULL;
 430
 431         /* check to see if there is a ccb for us to work with */
 432         if ((csio = (struct ccb_scsiio *)amr_dequeue_ccb(sc)) == NULL)
 433                 goto out;
 434
 435         /* get bus/target, XXX validate against protected devices? */
 436         bus = csio->ccb_h.sim_priv.entries[0].field;
 437         target = csio->ccb_h.target_id;
 438
 439         /*
 440          * Build a passthrough command.
 441          */
 442
 443         /* construct command */
 444         if ((ac = amr_alloccmd(sc)) == NULL) {
 445                 error = ENOMEM;
 446                 goto out;
 447         }
 448
 449         /* construct passthrough */
 450         if (sc->support_ext_cdb ) {
 451                 aep = &ac->ac_ccb->ccb_epthru;
 452                 aep->ap_timeout = 2;
 453                 aep->ap_ars = 1;
 454                 aep->ap_request_sense_length = 14;
 455                 aep->ap_islogical = 0;
 456                 aep->ap_channel = bus;
 457                 aep->ap_scsi_id = target;
 458                 aep->ap_logical_drive_no = csio->ccb_h.target_lun;
 459                 aep->ap_cdb_length = csio->cdb_len;
 460                 aep->ap_data_transfer_length = csio->dxfer_len;
 461                 if (csio->ccb_h.flags & CAM_CDB_POINTER) {
 462                         bcopy(csio->cdb_io.cdb_ptr, aep->ap_cdb, csio->cdb_len);
 463                 } else {
 464                         bcopy(csio->cdb_io.cdb_bytes, aep->ap_cdb,
 465                             csio->cdb_len);
 466                 }
 467                 /*
 468                  * we leave the data s/g list and s/g count to the map routine
 469                  * later
 470                  */
 471
 472                 debug(2, " COMMAND %x/%d+%d to %d:%d:%d", aep->ap_cdb[0],
 473                     aep->ap_cdb_length, csio->dxfer_len, aep->ap_channel,
 474                     aep->ap_scsi_id, aep->ap_logical_drive_no);
 475
 476         } else {
 477                 ap = &ac->ac_ccb->ccb_pthru;
 478                 ap->ap_timeout = 0;
 479                 ap->ap_ars = 1;
 480                 ap->ap_request_sense_length = 14;
 481                 ap->ap_islogical = 0;
 482                 ap->ap_channel = bus;
 483                 ap->ap_scsi_id = target;
 484                 ap->ap_logical_drive_no = csio->ccb_h.target_lun;
 485                 ap->ap_cdb_length = csio->cdb_len;
 486                 ap->ap_data_transfer_length = csio->dxfer_len;
 487                 if (csio->ccb_h.flags & CAM_CDB_POINTER) {
 488                         bcopy(csio->cdb_io.cdb_ptr, ap->ap_cdb, csio->cdb_len);
 489                 } else {
 490                         bcopy(csio->cdb_io.cdb_bytes, ap->ap_cdb,
 491                             csio->cdb_len);
 492                 }
 493                 /*
 494                  * we leave the data s/g list and s/g count to the map routine
 495                  * later
 496                  */
 497
 498                 debug(2, " COMMAND %x/%d+%d to %d:%d:%d", ap->ap_cdb[0],
 499                     ap->ap_cdb_length, csio->dxfer_len, ap->ap_channel,
 500                     ap->ap_scsi_id, ap->ap_logical_drive_no);
 501         }
 502
 503         ac->ac_flags |= AMR_CMD_CCB;
 504
 505         ac->ac_data = csio->data_ptr;
 506         ac->ac_length = csio->dxfer_len;
 507         if ((csio->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN)
 508                 ac->ac_flags |= AMR_CMD_DATAIN;
 509         if ((csio->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_OUT)
 510                 ac->ac_flags |= AMR_CMD_DATAOUT;
 511
 512         ac->ac_private = csio;
 513         ac->ac_complete = amr_cam_complete;
 514         if ( sc->support_ext_cdb ) {
 515                 ac->ac_mailbox.mb_command = AMR_CMD_EXTPASS;
 516         } else {
 517                 ac->ac_mailbox.mb_command = AMR_CMD_PASS;
 518         }
 519
 520 out:
 521         if (error != 0) {
 522                 if (ac != NULL)
 523                         amr_releasecmd(ac);
 524                 if (csio != NULL)
 525                         /* put it back and try again later */
 526                         amr_requeue_ccb(sc, (union ccb *)csio);
 527         }
 528         *acp = ac;
 529         return(error);
 530 }
 531
 532 /***********************************************************************
 533  * Check for interrupt status
 534  */
 535 static void
 536 amr_cam_poll(struct cam_sim *sim)
 537 {
 538
 539         amr_done(cam_sim_softc(sim));
 540 }
 541
 542  /**********************************************************************
 543  * Handle completion of a command submitted via CAM.
 544  */
 545 static void
 546 amr_cam_complete(struct amr_command *ac)
 547 {
 548         struct amr_passthrough          *ap;
 549         struct amr_ext_passthrough      *aep;
 550         struct ccb_scsiio               *csio;
 551         struct scsi_inquiry_data        *inq;
 552         int                             scsi_status, cdb0;
 553 #ifdef AMR_DEBUG
 554         char                            hexstr[HEX_NCPYLEN(16)];
 555 #endif
 556
 557         ap = &ac->ac_ccb->ccb_pthru;
 558         aep = &ac->ac_ccb->ccb_epthru;
 559         csio = (struct ccb_scsiio *)ac->ac_private;
 560         inq = (struct scsi_inquiry_data *)csio->data_ptr;
 561
 562         if (ac->ac_mailbox.mb_command == AMR_CMD_EXTPASS)
 563                 scsi_status = aep->ap_scsi_status;
 564         else
 565                 scsi_status = ap->ap_scsi_status;
 566         debug(1, "status 0x%x  AP scsi_status 0x%x", ac->ac_status,
 567             scsi_status);
 568
 569         /* Make sure the status is sane */
 570         if ((ac->ac_status != AMR_STATUS_SUCCESS) && (scsi_status == 0)) {
 571                 csio->ccb_h.status = CAM_REQ_CMP_ERR;
 572                 goto out;
 573         }
 574
 575         /*
 576          * Hide disks from CAM so that they're not picked up and treated as
 577          * 'normal' disks.
 578          *
 579          * If the configuration provides a mechanism to mark a disk a "not
 580          * managed", we could add handling for that to allow disks to be
 581          * selectively visible.
 582          */
 583
 584         /* handle passthrough SCSI status */
 585         switch(scsi_status) {
 586         case 0: /* completed OK */
 587                 if (ac->ac_mailbox.mb_command == AMR_CMD_EXTPASS)
 588                         cdb0 = aep->ap_cdb[0];
 589                 else
 590                         cdb0 = ap->ap_cdb[0];
 591                 if ((cdb0 == INQUIRY) && (SID_TYPE(inq) == T_DIRECT))
 592                         inq->device = (inq->device & 0xe0) | T_NODEVICE;
 593                 csio->ccb_h.status = CAM_REQ_CMP;
 594                 break;
 595
 596         case 0x02:
 597                 csio->ccb_h.status = CAM_SCSI_STATUS_ERROR;
 598                 csio->scsi_status = SCSI_STATUS_CHECK_COND;
 599                 if (ac->ac_mailbox.mb_command == AMR_CMD_EXTPASS)
 600                         bcopy(aep->ap_request_sense_area, &csio->sense_data,
 601                             AMR_MAX_REQ_SENSE_LEN);
 602                 else
 603                         bcopy(ap->ap_request_sense_area, &csio->sense_data,
 604                             AMR_MAX_REQ_SENSE_LEN);
 605                 csio->sense_len = AMR_MAX_REQ_SENSE_LEN;
 606                 csio->ccb_h.status |= CAM_AUTOSNS_VALID;
 607                 break;
 608
 609         case 0x08:
 610                 csio->ccb_h.status = CAM_SCSI_BUSY;
 611                 break;
 612
 613         case 0xf0:
 614         case 0xf4:
 615         default:
 616                 /*
 617                  * Non-zero LUNs are already filtered, so there's no need
 618                  * to return CAM_DEV_NOT_THERE.
 619                  */
 620                 csio->ccb_h.status = CAM_SEL_TIMEOUT;
 621                 break;
 622         }
 623
 624 out:
 625         if ((csio->ccb_h.flags & CAM_DIR_MASK) != CAM_DIR_NONE)
 626                 debug(2, "%s\n", hexncpy(csio->data_ptr, imin(csio->dxfer_len, 16),
 627                         hexstr, HEX_NCPYLEN(imin(csio->dxfer_len, 16)), " "));
 628
 629         lockmgr(&ac->ac_sc->amr_list_lock, LK_EXCLUSIVE);
 630         xpt_done((union ccb *)csio);
 631         amr_releasecmd(ac);
 632         lockmgr(&ac->ac_sc->amr_list_lock, LK_RELEASE);
 633 }