sys/cam/scsi/scsi_ch.c

   1 /*-
   2  * SPDX-License-Identifier: (BSD-2-Clause-FreeBSD AND BSD-4-Clause)
   3  *
   4  * Copyright (c) 1997 Justin T. Gibbs.
   5  * Copyright (c) 1997, 1998, 1999 Kenneth D. Merry.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions, and the following disclaimer,
  13  *    without modification, immediately at the beginning of the file.
  14  * 2. The name of the author may not be used to endorse or promote products
  15  *    derived from this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
  21  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  29
  30 /*-
  31  * Copyright (c) 1996, 1997 Jason R. Thorpe <thorpej@and.com>
  32  * All rights reserved.
  33  *
  34  * Partially based on an autochanger driver written by Stefan Grefen
  35  * and on an autochanger driver written by the Systems Programming Group
  36  * at the University of Utah Computer Science Department.
  37  *
  38  * Redistribution and use in source and binary forms, with or without
  39  * modification, are permitted provided that the following conditions
  40  * are met:
  41  * 1. Redistributions of source code must retain the above copyright
  42  *    notice, this list of conditions and the following disclaimer.
  43  * 2. Redistributions in binary form must reproduce the above copyright
  44  *    notice, this list of conditions and the following disclaimer in the
  45  *    documentation and/or other materials provided with the distribution.
  46  * 3. All advertising materials mentioning features or use of this software
  47  *    must display the following acknowledgements:
  48  *      This product includes software developed by Jason R. Thorpe
  49  *      for And Communications, http://www.and.com/
  50  * 4. The name of the author may not be used to endorse or promote products
  51  *    derived from this software without specific prior written permission.
  52  *
  53  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  54  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  55  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  56  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  57  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
  58  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  59  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  60  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  61  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  62  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  63  * SUCH DAMAGE.
  64  *
  65  * $NetBSD: ch.c,v 1.34 1998/08/31 22:28:06 cgd Exp $
  66  */
  67
  68 #include <sys/cdefs.h>
  69 __FBSDID("$FreeBSD$");
  70
  71 #include <sys/param.h>
  72 #include <sys/queue.h>
  73 #include <sys/systm.h>
  74 #include <sys/kernel.h>
  75 #include <sys/types.h>
  76 #include <sys/malloc.h>
  77 #include <sys/fcntl.h>
  78 #include <sys/conf.h>
  79 #include <sys/chio.h>
  80 #include <sys/errno.h>
  81 #include <sys/devicestat.h>
  82
  83 #include <cam/cam.h>
  84 #include <cam/cam_ccb.h>
  85 #include <cam/cam_periph.h>
  86 #include <cam/cam_xpt_periph.h>
  87 #include <cam/cam_debug.h>
  88
  89 #include <cam/scsi/scsi_all.h>
  90 #include <cam/scsi/scsi_message.h>
  91 #include <cam/scsi/scsi_ch.h>
  92
  93 /*
  94  * Timeout definitions for various changer related commands.  They may
  95  * be too short for some devices (especially the timeout for INITIALIZE
  96  * ELEMENT STATUS).
  97  */
  98
  99 static const u_int32_t  CH_TIMEOUT_MODE_SENSE                = 6000;
 100 static const u_int32_t  CH_TIMEOUT_MOVE_MEDIUM               = 15 * 60 * 1000;
 101 static const u_int32_t  CH_TIMEOUT_EXCHANGE_MEDIUM           = 15 * 60 * 1000;
 102 static const u_int32_t  CH_TIMEOUT_POSITION_TO_ELEMENT       = 15 * 60 * 1000;
 103 static const u_int32_t  CH_TIMEOUT_READ_ELEMENT_STATUS       = 5 * 60 * 1000;
 104 static const u_int32_t  CH_TIMEOUT_SEND_VOLTAG               = 10000;
 105 static const u_int32_t  CH_TIMEOUT_INITIALIZE_ELEMENT_STATUS = 500000;
 106
 107 typedef enum {
 108         CH_FLAG_INVALID         = 0x001
 109 } ch_flags;
 110
 111 typedef enum {
 112         CH_STATE_PROBE,
 113         CH_STATE_NORMAL
 114 } ch_state;
 115
 116 typedef enum {
 117         CH_CCB_PROBE
 118 } ch_ccb_types;
 119
 120 typedef enum {
 121         CH_Q_NONE       = 0x00,
 122         CH_Q_NO_DBD     = 0x01,
 123         CH_Q_NO_DVCID   = 0x02
 124 } ch_quirks;
 125
 126 #define CH_Q_BIT_STRING \
 127         "\020"          \
 128         "\001NO_DBD"    \
 129         "\002NO_DVCID"
 130
 131 #define ccb_state       ppriv_field0
 132 #define ccb_bp          ppriv_ptr1
 133
 134 struct scsi_mode_sense_data {
 135         struct scsi_mode_header_6 header;
 136         struct scsi_mode_blk_desc blk_desc;
 137         union {
 138                 struct page_element_address_assignment ea;
 139                 struct page_transport_geometry_parameters tg;
 140                 struct page_device_capabilities cap;
 141         } pages;
 142 };
 143
 144 struct ch_softc {
 145         ch_flags        flags;
 146         ch_state        state;
 147         ch_quirks       quirks;
 148         union ccb       saved_ccb;
 149         struct devstat  *device_stats;
 150         struct cdev     *dev;
 151         int             open_count;
 152
 153         int             sc_picker;      /* current picker */
 154
 155         /*
 156          * The following information is obtained from the
 157          * element address assignment page.
 158          */
 159         int             sc_firsts[CHET_MAX + 1];        /* firsts */
 160         int             sc_counts[CHET_MAX + 1];        /* counts */
 161
 162         /*
 163          * The following mask defines the legal combinations
 164          * of elements for the MOVE MEDIUM command.
 165          */
 166         u_int8_t        sc_movemask[CHET_MAX + 1];
 167
 168         /*
 169          * As above, but for EXCHANGE MEDIUM.
 170          */
 171         u_int8_t        sc_exchangemask[CHET_MAX + 1];
 172
 173         /*
 174          * Quirks; see below.  XXX KDM not implemented yet
 175          */
 176         int             sc_settledelay; /* delay for settle */
 177 };
 178
 179 static  d_open_t        chopen;
 180 static  d_close_t       chclose;
 181 static  d_ioctl_t       chioctl;
 182 static  periph_init_t   chinit;
 183 static  periph_ctor_t   chregister;
 184 static  periph_oninv_t  choninvalidate;
 185 static  periph_dtor_t   chcleanup;
 186 static  periph_start_t  chstart;
 187 static  void            chasync(void *callback_arg, u_int32_t code,
 188                                 struct cam_path *path, void *arg);
 189 static  void            chdone(struct cam_periph *periph,
 190                                union ccb *done_ccb);
 191 static  int             cherror(union ccb *ccb, u_int32_t cam_flags,
 192                                 u_int32_t sense_flags);
 193 static  int             chmove(struct cam_periph *periph,
 194                                struct changer_move *cm);
 195 static  int             chexchange(struct cam_periph *periph,
 196                                    struct changer_exchange *ce);
 197 static  int             chposition(struct cam_periph *periph,
 198                                    struct changer_position *cp);
 199 static  int             chgetelemstatus(struct cam_periph *periph,
 200                                 int scsi_version, u_long cmd,
 201                                 struct changer_element_status_request *csr);
 202 static  int             chsetvoltag(struct cam_periph *periph,
 203                                     struct changer_set_voltag_request *csvr);
 204 static  int             chielem(struct cam_periph *periph,
 205                                 unsigned int timeout);
 206 static  int             chgetparams(struct cam_periph *periph);
 207 static  int             chscsiversion(struct cam_periph *periph);
 208
 209 static struct periph_driver chdriver =
 210 {
 211         chinit, "ch",
 212         TAILQ_HEAD_INITIALIZER(chdriver.units), /* generation */ 0
 213 };
 214
 215 PERIPHDRIVER_DECLARE(ch, chdriver);
 216
 217 static struct cdevsw ch_cdevsw = {
 218         .d_version =    D_VERSION,
 219         .d_flags =      D_TRACKCLOSE,
 220         .d_open =       chopen,
 221         .d_close =      chclose,
 222         .d_ioctl =      chioctl,
 223         .d_name =       "ch",
 224 };
 225
 226 static MALLOC_DEFINE(M_SCSICH, "scsi_ch", "scsi_ch buffers");
 227
 228 static void
 229 chinit(void)
 230 {
 231         cam_status status;
 232
 233         /*
 234          * Install a global async callback.  This callback will
 235          * receive async callbacks like "new device found".
 236          */
 237         status = xpt_register_async(AC_FOUND_DEVICE, chasync, NULL, NULL);
 238
 239         if (status != CAM_REQ_CMP) {
 240                 printf("ch: Failed to attach master async callback "
 241                        "due to status 0x%x!\n", status);
 242         }
 243 }
 244
 245 static void
 246 chdevgonecb(void *arg)
 247 {
 248         struct ch_softc   *softc;
 249         struct cam_periph *periph;
 250         struct mtx *mtx;
 251         int i;
 252
 253         periph = (struct cam_periph *)arg;
 254         mtx = cam_periph_mtx(periph);
 255         mtx_lock(mtx);
 256
 257         softc = (struct ch_softc *)periph->softc;
 258         KASSERT(softc->open_count >= 0, ("Negative open count %d",
 259                 softc->open_count));
 260
 261         /*
 262          * When we get this callback, we will get no more close calls from
 263          * devfs.  So if we have any dangling opens, we need to release the
 264          * reference held for that particular context.
 265          */
 266         for (i = 0; i < softc->open_count; i++)
 267                 cam_periph_release_locked(periph);
 268
 269         softc->open_count = 0;
 270
 271         /*
 272          * Release the reference held for the device node, it is gone now.
 273          */
 274         cam_periph_release_locked(periph);
 275
 276         /*
 277          * We reference the lock directly here, instead of using
 278          * cam_periph_unlock().  The reason is that the final call to
 279          * cam_periph_release_locked() above could result in the periph
 280          * getting freed.  If that is the case, dereferencing the periph
 281          * with a cam_periph_unlock() call would cause a page fault.
 282          */
 283         mtx_unlock(mtx);
 284 }
 285
 286 static void
 287 choninvalidate(struct cam_periph *periph)
 288 {
 289         struct ch_softc *softc;
 290
 291         softc = (struct ch_softc *)periph->softc;
 292
 293         /*
 294          * De-register any async callbacks.
 295          */
 296         xpt_register_async(0, chasync, periph, periph->path);
 297
 298         softc->flags |= CH_FLAG_INVALID;
 299
 300         /*
 301          * Tell devfs this device has gone away, and ask for a callback
 302          * when it has cleaned up its state.
 303          */
 304         destroy_dev_sched_cb(softc->dev, chdevgonecb, periph);
 305 }
 306
 307 static void
 308 chcleanup(struct cam_periph *periph)
 309 {
 310         struct ch_softc *softc;
 311
 312         softc = (struct ch_softc *)periph->softc;
 313
 314         devstat_remove_entry(softc->device_stats);
 315
 316         free(softc, M_DEVBUF);
 317 }
 318
 319 static void
 320 chasync(void *callback_arg, u_int32_t code, struct cam_path *path, void *arg)
 321 {
 322         struct cam_periph *periph;
 323
 324         periph = (struct cam_periph *)callback_arg;
 325
 326         switch(code) {
 327         case AC_FOUND_DEVICE:
 328         {
 329                 struct ccb_getdev *cgd;
 330                 cam_status status;
 331
 332                 cgd = (struct ccb_getdev *)arg;
 333                 if (cgd == NULL)
 334                         break;
 335
 336                 if (cgd->protocol != PROTO_SCSI)
 337                         break;
 338                 if (SID_QUAL(&cgd->inq_data) != SID_QUAL_LU_CONNECTED)
 339                         break;
 340                 if (SID_TYPE(&cgd->inq_data)!= T_CHANGER)
 341                         break;
 342
 343                 /*
 344                  * Allocate a peripheral instance for
 345                  * this device and start the probe
 346                  * process.
 347                  */
 348                 status = cam_periph_alloc(chregister, choninvalidate,
 349                                           chcleanup, chstart, "ch",
 350                                           CAM_PERIPH_BIO, path,
 351                                           chasync, AC_FOUND_DEVICE, cgd);
 352
 353                 if (status != CAM_REQ_CMP
 354                  && status != CAM_REQ_INPROG)
 355                         printf("chasync: Unable to probe new device "
 356                                "due to status 0x%x\n", status);
 357
 358                 break;
 359
 360         }
 361         default:
 362                 cam_periph_async(periph, code, path, arg);
 363                 break;
 364         }
 365 }
 366
 367 static cam_status
 368 chregister(struct cam_periph *periph, void *arg)
 369 {
 370         struct ch_softc *softc;
 371         struct ccb_getdev *cgd;
 372         struct ccb_pathinq cpi;
 373         struct make_dev_args args;
 374         int error;
 375
 376         cgd = (struct ccb_getdev *)arg;
 377         if (cgd == NULL) {
 378                 printf("chregister: no getdev CCB, can't register device\n");
 379                 return(CAM_REQ_CMP_ERR);
 380         }
 381
 382         softc = (struct ch_softc *)malloc(sizeof(*softc),M_DEVBUF,M_NOWAIT);
 383
 384         if (softc == NULL) {
 385                 printf("chregister: Unable to probe new device. "
 386                        "Unable to allocate softc\n");
 387                 return(CAM_REQ_CMP_ERR);
 388         }
 389
 390         bzero(softc, sizeof(*softc));
 391         softc->state = CH_STATE_PROBE;
 392         periph->softc = softc;
 393         softc->quirks = CH_Q_NONE;
 394
 395         /*
 396          * The DVCID and CURDATA bits were not introduced until the SMC
 397          * spec.  If this device claims SCSI-2 or earlier support, then it
 398          * very likely does not support these bits.
 399          */
 400         if (cgd->inq_data.version <= SCSI_REV_2)
 401                 softc->quirks |= CH_Q_NO_DVCID;
 402
 403         xpt_path_inq(&cpi, periph->path);
 404
 405         /*
 406          * Changers don't have a blocksize, and obviously don't support
 407          * tagged queueing.
 408          */
 409         cam_periph_unlock(periph);
 410         softc->device_stats = devstat_new_entry("ch",
 411                           periph->unit_number, 0,
 412                           DEVSTAT_NO_BLOCKSIZE | DEVSTAT_NO_ORDERED_TAGS,
 413                           SID_TYPE(&cgd->inq_data) |
 414                           XPORT_DEVSTAT_TYPE(cpi.transport),
 415                           DEVSTAT_PRIORITY_OTHER);
 416
 417         /*
 418          * Acquire a reference to the periph before we create the devfs
 419          * instance for it.  We'll release this reference once the devfs
 420          * instance has been freed.
 421          */
 422         if (cam_periph_acquire(periph) != 0) {
 423                 xpt_print(periph->path, "%s: lost periph during "
 424                           "registration!\n", __func__);
 425                 cam_periph_lock(periph);
 426                 return (CAM_REQ_CMP_ERR);
 427         }
 428
 429
 430         /* Register the device */
 431         make_dev_args_init(&args);
 432         args.mda_devsw = &ch_cdevsw;
 433         args.mda_unit = periph->unit_number;
 434         args.mda_uid = UID_ROOT;
 435         args.mda_gid = GID_OPERATOR;
 436         args.mda_mode = 0600;
 437         args.mda_si_drv1 = periph;
 438         error = make_dev_s(&args, &softc->dev, "%s%d", periph->periph_name,
 439             periph->unit_number);
 440         cam_periph_lock(periph);
 441         if (error != 0) {
 442                 cam_periph_release_locked(periph);
 443                 return (CAM_REQ_CMP_ERR);
 444         }
 445
 446         /*
 447          * Add an async callback so that we get
 448          * notified if this device goes away.
 449          */
 450         xpt_register_async(AC_LOST_DEVICE, chasync, periph, periph->path);
 451
 452         /*
 453          * Lock this periph until we are setup.
 454          * This first call can't block
 455          */
 456         (void)cam_periph_hold(periph, PRIBIO);
 457         xpt_schedule(periph, CAM_PRIORITY_DEV);
 458
 459         return(CAM_REQ_CMP);
 460 }
 461
 462 static int
 463 chopen(struct cdev *dev, int flags, int fmt, struct thread *td)
 464 {
 465         struct cam_periph *periph;
 466         struct ch_softc *softc;
 467         int error;
 468
 469         periph = (struct cam_periph *)dev->si_drv1;
 470         if (cam_periph_acquire(periph) != 0)
 471                 return (ENXIO);
 472
 473         softc = (struct ch_softc *)periph->softc;
 474
 475         cam_periph_lock(periph);
 476
 477         if (softc->flags & CH_FLAG_INVALID) {
 478                 cam_periph_release_locked(periph);
 479                 cam_periph_unlock(periph);
 480                 return(ENXIO);
 481         }
 482
 483         if ((error = cam_periph_hold(periph, PRIBIO | PCATCH)) != 0) {
 484                 cam_periph_unlock(periph);
 485                 cam_periph_release(periph);
 486                 return (error);
 487         }
 488
 489         /*
 490          * Load information about this changer device into the softc.
 491          */
 492         if ((error = chgetparams(periph)) != 0) {
 493                 cam_periph_unhold(periph);
 494                 cam_periph_release_locked(periph);
 495                 cam_periph_unlock(periph);
 496                 return(error);
 497         }
 498
 499         cam_periph_unhold(periph);
 500
 501         softc->open_count++;
 502
 503         cam_periph_unlock(periph);
 504
 505         return(error);
 506 }
 507
 508 static int
 509 chclose(struct cdev *dev, int flag, int fmt, struct thread *td)
 510 {
 511         struct  cam_periph *periph;
 512         struct  ch_softc *softc;
 513         struct mtx *mtx;
 514
 515         periph = (struct cam_periph *)dev->si_drv1;
 516         mtx = cam_periph_mtx(periph);
 517         mtx_lock(mtx);
 518
 519         softc = (struct ch_softc *)periph->softc;
 520         softc->open_count--;
 521
 522         cam_periph_release_locked(periph);
 523
 524         /*
 525          * We reference the lock directly here, instead of using
 526          * cam_periph_unlock().  The reason is that the call to
 527          * cam_periph_release_locked() above could result in the periph
 528          * getting freed.  If that is the case, dereferencing the periph
 529          * with a cam_periph_unlock() call would cause a page fault.
 530          *
 531          * cam_periph_release() avoids this problem using the same method,
 532          * but we're manually acquiring and dropping the lock here to
 533          * protect the open count and avoid another lock acquisition and
 534          * release.
 535          */
 536         mtx_unlock(mtx);
 537
 538         return(0);
 539 }
 540
 541 static void
 542 chstart(struct cam_periph *periph, union ccb *start_ccb)
 543 {
 544         struct ch_softc *softc;
 545
 546         softc = (struct ch_softc *)periph->softc;
 547
 548         switch (softc->state) {
 549         case CH_STATE_NORMAL:
 550         {
 551                 xpt_release_ccb(start_ccb);
 552                 break;
 553         }
 554         case CH_STATE_PROBE:
 555         {
 556                 int mode_buffer_len;
 557                 void *mode_buffer;
 558
 559                 /*
 560                  * Include the block descriptor when calculating the mode
 561                  * buffer length,
 562                  */
 563                 mode_buffer_len = sizeof(struct scsi_mode_header_6) +
 564                                   sizeof(struct scsi_mode_blk_desc) +
 565                                  sizeof(struct page_element_address_assignment);
 566
 567                 mode_buffer = malloc(mode_buffer_len, M_SCSICH, M_NOWAIT);
 568
 569                 if (mode_buffer == NULL) {
 570                         printf("chstart: couldn't malloc mode sense data\n");
 571                         break;
 572                 }
 573                 bzero(mode_buffer, mode_buffer_len);
 574
 575                 /*
 576                  * Get the element address assignment page.
 577                  */
 578                 scsi_mode_sense(&start_ccb->csio,
 579                                 /* retries */ 1,
 580                                 /* cbfcnp */ chdone,
 581                                 /* tag_action */ MSG_SIMPLE_Q_TAG,
 582                                 /* dbd */ (softc->quirks & CH_Q_NO_DBD) ?
 583                                         FALSE : TRUE,
 584                                 /* pc */ SMS_PAGE_CTRL_CURRENT,
 585                                 /* page */ CH_ELEMENT_ADDR_ASSIGN_PAGE,
 586                                 /* param_buf */ (u_int8_t *)mode_buffer,
 587                                 /* param_len */ mode_buffer_len,
 588                                 /* sense_len */ SSD_FULL_SIZE,
 589                                 /* timeout */ CH_TIMEOUT_MODE_SENSE);
 590
 591                 start_ccb->ccb_h.ccb_bp = NULL;
 592                 start_ccb->ccb_h.ccb_state = CH_CCB_PROBE;
 593                 xpt_action(start_ccb);
 594                 break;
 595         }
 596         }
 597 }
 598
 599 static void
 600 chdone(struct cam_periph *periph, union ccb *done_ccb)
 601 {
 602         struct ch_softc *softc;
 603         struct ccb_scsiio *csio;
 604
 605         softc = (struct ch_softc *)periph->softc;
 606         csio = &done_ccb->csio;
 607
 608         switch(done_ccb->ccb_h.ccb_state) {
 609         case CH_CCB_PROBE:
 610         {
 611                 struct scsi_mode_header_6 *mode_header;
 612                 struct page_element_address_assignment *ea;
 613                 char announce_buf[80];
 614
 615
 616                 mode_header = (struct scsi_mode_header_6 *)csio->data_ptr;
 617
 618                 ea = (struct page_element_address_assignment *)
 619                         find_mode_page_6(mode_header);
 620
 621                 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP){
 622
 623                         softc->sc_firsts[CHET_MT] = scsi_2btoul(ea->mtea);
 624                         softc->sc_counts[CHET_MT] = scsi_2btoul(ea->nmte);
 625                         softc->sc_firsts[CHET_ST] = scsi_2btoul(ea->fsea);
 626                         softc->sc_counts[CHET_ST] = scsi_2btoul(ea->nse);
 627                         softc->sc_firsts[CHET_IE] = scsi_2btoul(ea->fieea);
 628                         softc->sc_counts[CHET_IE] = scsi_2btoul(ea->niee);
 629                         softc->sc_firsts[CHET_DT] = scsi_2btoul(ea->fdtea);
 630                         softc->sc_counts[CHET_DT] = scsi_2btoul(ea->ndte);
 631                         softc->sc_picker = softc->sc_firsts[CHET_MT];
 632
 633 #define PLURAL(c)       (c) == 1 ? "" : "s"
 634                         snprintf(announce_buf, sizeof(announce_buf),
 635                                 "%d slot%s, %d drive%s, "
 636                                 "%d picker%s, %d portal%s",
 637                                 softc->sc_counts[CHET_ST],
 638                                 PLURAL(softc->sc_counts[CHET_ST]),
 639                                 softc->sc_counts[CHET_DT],
 640                                 PLURAL(softc->sc_counts[CHET_DT]),
 641                                 softc->sc_counts[CHET_MT],
 642                                 PLURAL(softc->sc_counts[CHET_MT]),
 643                                 softc->sc_counts[CHET_IE],
 644                                 PLURAL(softc->sc_counts[CHET_IE]));
 645 #undef PLURAL
 646                         if (announce_buf[0] != '\0') {
 647                                 xpt_announce_periph(periph, announce_buf);
 648                                 xpt_announce_quirks(periph, softc->quirks,
 649                                     CH_Q_BIT_STRING);
 650                         }
 651                 } else {
 652                         int error;
 653
 654                         error = cherror(done_ccb, CAM_RETRY_SELTO,
 655                                         SF_RETRY_UA | SF_NO_PRINT);
 656                         /*
 657                          * Retry any UNIT ATTENTION type errors.  They
 658                          * are expected at boot.
 659                          */
 660                         if (error == ERESTART) {
 661                                 /*
 662                                  * A retry was scheduled, so
 663                                  * just return.
 664                                  */
 665                                 return;
 666                         } else if (error != 0) {
 667                                 struct scsi_mode_sense_6 *sms;
 668                                 int frozen, retry_scheduled;
 669
 670                                 sms = (struct scsi_mode_sense_6 *)
 671                                         done_ccb->csio.cdb_io.cdb_bytes;
 672                                 frozen = (done_ccb->ccb_h.status &
 673                                     CAM_DEV_QFRZN) != 0;
 674
 675                                 /*
 676                                  * Check to see if block descriptors were
 677                                  * disabled.  Some devices don't like that.
 678                                  * We're taking advantage of the fact that
 679                                  * the first few bytes of the 6 and 10 byte
 680                                  * mode sense commands are the same.  If
 681                                  * block descriptors were disabled, enable
 682                                  * them and re-send the command.
 683                                  */
 684                                 if ((sms->byte2 & SMS_DBD) != 0 &&
 685                                     (periph->flags & CAM_PERIPH_INVALID) == 0) {
 686                                         sms->byte2 &= ~SMS_DBD;
 687                                         xpt_action(done_ccb);
 688                                         softc->quirks |= CH_Q_NO_DBD;
 689                                         retry_scheduled = 1;
 690                                 } else
 691                                         retry_scheduled = 0;
 692
 693                                 /* Don't wedge this device's queue */
 694                                 if (frozen)
 695                                         cam_release_devq(done_ccb->ccb_h.path,
 696                                                  /*relsim_flags*/0,
 697                                                  /*reduction*/0,
 698                                                  /*timeout*/0,
 699                                                  /*getcount_only*/0);
 700
 701                                 if (retry_scheduled)
 702                                         return;
 703
 704                                 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK)
 705                                     == CAM_SCSI_STATUS_ERROR)
 706                                         scsi_sense_print(&done_ccb->csio);
 707                                 else {
 708                                         xpt_print(periph->path,
 709                                             "got CAM status %#x\n",
 710                                             done_ccb->ccb_h.status);
 711                                 }
 712                                 xpt_print(periph->path, "fatal error, failed "
 713                                     "to attach to device\n");
 714
 715                                 cam_periph_invalidate(periph);
 716
 717                         }
 718                 }
 719                 softc->state = CH_STATE_NORMAL;
 720                 free(mode_header, M_SCSICH);
 721                 /*
 722                  * Since our peripheral may be invalidated by an error
 723                  * above or an external event, we must release our CCB
 724                  * before releasing the probe lock on the peripheral.
 725                  * The peripheral will only go away once the last lock
 726                  * is removed, and we need it around for the CCB release
 727                  * operation.
 728                  */
 729                 xpt_release_ccb(done_ccb);
 730                 cam_periph_unhold(periph);
 731                 return;
 732         }
 733         default:
 734                 break;
 735         }
 736         xpt_release_ccb(done_ccb);
 737 }
 738
 739 static int
 740 cherror(union ccb *ccb, u_int32_t cam_flags, u_int32_t sense_flags)
 741 {
 742         struct ch_softc *softc;
 743         struct cam_periph *periph;
 744
 745         periph = xpt_path_periph(ccb->ccb_h.path);
 746         softc = (struct ch_softc *)periph->softc;
 747
 748         return (cam_periph_error(ccb, cam_flags, sense_flags));
 749 }
 750
 751 static int
 752 chioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
 753 {
 754         struct cam_periph *periph;
 755         struct ch_softc *softc;
 756         int error;
 757
 758         periph = (struct cam_periph *)dev->si_drv1;
 759         cam_periph_lock(periph);
 760         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("entering chioctl\n"));
 761
 762         softc = (struct ch_softc *)periph->softc;
 763
 764         error = 0;
 765
 766         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE,
 767                   ("trying to do ioctl %#lx\n", cmd));
 768
 769         /*
 770          * If this command can change the device's state, we must
 771          * have the device open for writing.
 772          */
 773         switch (cmd) {
 774         case CHIOGPICKER:
 775         case CHIOGPARAMS:
 776         case OCHIOGSTATUS:
 777         case CHIOGSTATUS:
 778                 break;
 779
 780         default:
 781                 if ((flag & FWRITE) == 0) {
 782                         cam_periph_unlock(periph);
 783                         return (EBADF);
 784                 }
 785         }
 786
 787         switch (cmd) {
 788         case CHIOMOVE:
 789                 error = chmove(periph, (struct changer_move *)addr);
 790                 break;
 791
 792         case CHIOEXCHANGE:
 793                 error = chexchange(periph, (struct changer_exchange *)addr);
 794                 break;
 795
 796         case CHIOPOSITION:
 797                 error = chposition(periph, (struct changer_position *)addr);
 798                 break;
 799
 800         case CHIOGPICKER:
 801                 *(int *)addr = softc->sc_picker - softc->sc_firsts[CHET_MT];
 802                 break;
 803
 804         case CHIOSPICKER:
 805         {
 806                 int new_picker = *(int *)addr;
 807
 808                 if (new_picker > (softc->sc_counts[CHET_MT] - 1)) {
 809                         error = EINVAL;
 810                         break;
 811                 }
 812                 softc->sc_picker = softc->sc_firsts[CHET_MT] + new_picker;
 813                 break;
 814         }
 815         case CHIOGPARAMS:
 816         {
 817                 struct changer_params *cp = (struct changer_params *)addr;
 818
 819                 cp->cp_npickers = softc->sc_counts[CHET_MT];
 820                 cp->cp_nslots = softc->sc_counts[CHET_ST];
 821                 cp->cp_nportals = softc->sc_counts[CHET_IE];
 822                 cp->cp_ndrives = softc->sc_counts[CHET_DT];
 823                 break;
 824         }
 825         case CHIOIELEM:
 826                 error = chielem(periph, *(unsigned int *)addr);
 827                 break;
 828
 829         case OCHIOGSTATUS:
 830         {
 831                 error = chgetelemstatus(periph, SCSI_REV_2, cmd,
 832                     (struct changer_element_status_request *)addr);
 833                 break;
 834         }
 835
 836         case CHIOGSTATUS:
 837         {
 838                 int scsi_version;
 839
 840                 scsi_version = chscsiversion(periph);
 841                 if (scsi_version >= SCSI_REV_0) {
 842                         error = chgetelemstatus(periph, scsi_version, cmd,
 843                             (struct changer_element_status_request *)addr);
 844                 }
 845                 else { /* unable to determine the SCSI version */
 846                         cam_periph_unlock(periph);
 847                         return (ENXIO);
 848                 }
 849                 break;
 850         }
 851
 852         case CHIOSETVOLTAG:
 853         {
 854                 error = chsetvoltag(periph,
 855                                     (struct changer_set_voltag_request *) addr);
 856                 break;
 857         }
 858
 859         /* Implement prevent/allow? */
 860
 861         default:
 862                 error = cam_periph_ioctl(periph, cmd, addr, cherror);
 863                 break;
 864         }
 865
 866         cam_periph_unlock(periph);
 867         return (error);
 868 }
 869
 870 static int
 871 chmove(struct cam_periph *periph, struct changer_move *cm)
 872 {
 873         struct ch_softc *softc;
 874         u_int16_t fromelem, toelem;
 875         union ccb *ccb;
 876         int error;
 877
 878         error = 0;
 879         softc = (struct ch_softc *)periph->softc;
 880
 881         /*
 882          * Check arguments.
 883          */
 884         if ((cm->cm_fromtype > CHET_DT) || (cm->cm_totype > CHET_DT))
 885                 return (EINVAL);
 886         if ((cm->cm_fromunit > (softc->sc_counts[cm->cm_fromtype] - 1)) ||
 887             (cm->cm_tounit > (softc->sc_counts[cm->cm_totype] - 1)))
 888                 return (ENODEV);
 889
 890         /*
 891          * Check the request against the changer's capabilities.
 892          */
 893         if ((softc->sc_movemask[cm->cm_fromtype] & (1 << cm->cm_totype)) == 0)
 894                 return (ENODEV);
 895
 896         /*
 897          * Calculate the source and destination elements.
 898          */
 899         fromelem = softc->sc_firsts[cm->cm_fromtype] + cm->cm_fromunit;
 900         toelem = softc->sc_firsts[cm->cm_totype] + cm->cm_tounit;
 901
 902         ccb = cam_periph_getccb(periph, CAM_PRIORITY_NORMAL);
 903
 904         scsi_move_medium(&ccb->csio,
 905                          /* retries */ 1,
 906                          /* cbfcnp */ chdone,
 907                          /* tag_action */ MSG_SIMPLE_Q_TAG,
 908                          /* tea */ softc->sc_picker,
 909                          /* src */ fromelem,
 910                          /* dst */ toelem,
 911                          /* invert */ (cm->cm_flags & CM_INVERT) ? TRUE : FALSE,
 912                          /* sense_len */ SSD_FULL_SIZE,
 913                          /* timeout */ CH_TIMEOUT_MOVE_MEDIUM);
 914
 915         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/CAM_RETRY_SELTO,
 916                                   /*sense_flags*/ SF_RETRY_UA,
 917                                   softc->device_stats);
 918
 919         xpt_release_ccb(ccb);
 920
 921         return(error);
 922 }
 923
 924 static int
 925 chexchange(struct cam_periph *periph, struct changer_exchange *ce)
 926 {
 927         struct ch_softc *softc;
 928         u_int16_t src, dst1, dst2;
 929         union ccb *ccb;
 930         int error;
 931
 932         error = 0;
 933         softc = (struct ch_softc *)periph->softc;
 934         /*
 935          * Check arguments.
 936          */
 937         if ((ce->ce_srctype > CHET_DT) || (ce->ce_fdsttype > CHET_DT) ||
 938             (ce->ce_sdsttype > CHET_DT))
 939                 return (EINVAL);
 940         if ((ce->ce_srcunit > (softc->sc_counts[ce->ce_srctype] - 1)) ||
 941             (ce->ce_fdstunit > (softc->sc_counts[ce->ce_fdsttype] - 1)) ||
 942             (ce->ce_sdstunit > (softc->sc_counts[ce->ce_sdsttype] - 1)))
 943                 return (ENODEV);
 944
 945         /*
 946          * Check the request against the changer's capabilities.
 947          */
 948         if (((softc->sc_exchangemask[ce->ce_srctype] &
 949              (1 << ce->ce_fdsttype)) == 0) ||
 950             ((softc->sc_exchangemask[ce->ce_fdsttype] &
 951              (1 << ce->ce_sdsttype)) == 0))
 952                 return (ENODEV);
 953
 954         /*
 955          * Calculate the source and destination elements.
 956          */
 957         src = softc->sc_firsts[ce->ce_srctype] + ce->ce_srcunit;
 958         dst1 = softc->sc_firsts[ce->ce_fdsttype] + ce->ce_fdstunit;
 959         dst2 = softc->sc_firsts[ce->ce_sdsttype] + ce->ce_sdstunit;
 960
 961         ccb = cam_periph_getccb(periph, CAM_PRIORITY_NORMAL);
 962
 963         scsi_exchange_medium(&ccb->csio,
 964                              /* retries */ 1,
 965                              /* cbfcnp */ chdone,
 966                              /* tag_action */ MSG_SIMPLE_Q_TAG,
 967                              /* tea */ softc->sc_picker,
 968                              /* src */ src,
 969                              /* dst1 */ dst1,
 970                              /* dst2 */ dst2,
 971                              /* invert1 */ (ce->ce_flags & CE_INVERT1) ?
 972                                            TRUE : FALSE,
 973                              /* invert2 */ (ce->ce_flags & CE_INVERT2) ?
 974                                            TRUE : FALSE,
 975                              /* sense_len */ SSD_FULL_SIZE,
 976                              /* timeout */ CH_TIMEOUT_EXCHANGE_MEDIUM);
 977
 978         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/CAM_RETRY_SELTO,
 979                                   /*sense_flags*/ SF_RETRY_UA,
 980                                   softc->device_stats);
 981
 982         xpt_release_ccb(ccb);
 983
 984         return(error);
 985 }
 986
 987 static int
 988 chposition(struct cam_periph *periph, struct changer_position *cp)
 989 {
 990         struct ch_softc *softc;
 991         u_int16_t dst;
 992         union ccb *ccb;
 993         int error;
 994
 995         error = 0;
 996         softc = (struct ch_softc *)periph->softc;
 997
 998         /*
 999          * Check arguments.
1000          */
1001         if (cp->cp_type > CHET_DT)
1002                 return (EINVAL);
1003         if (cp->cp_unit > (softc->sc_counts[cp->cp_type] - 1))
1004                 return (ENODEV);
1005
1006         /*
1007          * Calculate the destination element.
1008          */
1009         dst = softc->sc_firsts[cp->cp_type] + cp->cp_unit;
1010
1011         ccb = cam_periph_getccb(periph, CAM_PRIORITY_NORMAL);
1012
1013         scsi_position_to_element(&ccb->csio,
1014                                  /* retries */ 1,
1015                                  /* cbfcnp */ chdone,
1016                                  /* tag_action */ MSG_SIMPLE_Q_TAG,
1017                                  /* tea */ softc->sc_picker,
1018                                  /* dst */ dst,
1019                                  /* invert */ (cp->cp_flags & CP_INVERT) ?
1020                                               TRUE : FALSE,
1021                                  /* sense_len */ SSD_FULL_SIZE,
1022                                  /* timeout */ CH_TIMEOUT_POSITION_TO_ELEMENT);
1023
1024         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
1025                                   /*sense_flags*/ SF_RETRY_UA,
1026                                   softc->device_stats);
1027
1028         xpt_release_ccb(ccb);
1029
1030         return(error);
1031 }
1032
1033 /*
1034  * Copy a volume tag to a volume_tag struct, converting SCSI byte order
1035  * to host native byte order in the volume serial number.  The volume
1036  * label as returned by the changer is transferred to user mode as
1037  * nul-terminated string.  Volume labels are truncated at the first
1038  * space, as suggested by SCSI-2.
1039  */
1040 static  void
1041 copy_voltag(struct changer_voltag *uvoltag, struct volume_tag *voltag)
1042 {
1043         int i;
1044         for (i=0; i<CH_VOLTAG_MAXLEN; i++) {
1045                 char c = voltag->vif[i];
1046                 if (c && c != ' ')
1047                         uvoltag->cv_volid[i] = c;
1048                 else
1049                         break;
1050         }
1051         uvoltag->cv_serial = scsi_2btoul(voltag->vsn);
1052 }
1053
1054 /*
1055  * Copy an element status descriptor to a user-mode
1056  * changer_element_status structure.
1057  */
1058 static void
1059 copy_element_status(struct ch_softc *softc,
1060                     u_int16_t flags,
1061                     struct read_element_status_descriptor *desc,
1062                     struct changer_element_status *ces,
1063                     int scsi_version)
1064 {
1065         u_int16_t eaddr = scsi_2btoul(desc->eaddr);
1066         u_int16_t et;
1067         struct volume_tag *pvol_tag = NULL, *avol_tag = NULL;
1068         struct read_element_status_device_id *devid = NULL;
1069
1070         ces->ces_int_addr = eaddr;
1071         /* set up logical address in element status */
1072         for (et = CHET_MT; et <= CHET_DT; et++) {
1073                 if ((softc->sc_firsts[et] <= eaddr)
1074                     && ((softc->sc_firsts[et] + softc->sc_counts[et])
1075                         > eaddr)) {
1076                         ces->ces_addr = eaddr - softc->sc_firsts[et];
1077                         ces->ces_type = et;
1078                         break;
1079                 }
1080         }
1081
1082         ces->ces_flags = desc->flags1;
1083
1084         ces->ces_sensecode = desc->sense_code;
1085         ces->ces_sensequal = desc->sense_qual;
1086
1087         if (desc->flags2 & READ_ELEMENT_STATUS_INVERT)
1088                 ces->ces_flags |= CES_INVERT;
1089
1090         if (desc->flags2 & READ_ELEMENT_STATUS_SVALID) {
1091
1092                 eaddr = scsi_2btoul(desc->ssea);
1093
1094                 /* convert source address to logical format */
1095                 for (et = CHET_MT; et <= CHET_DT; et++) {
1096                         if ((softc->sc_firsts[et] <= eaddr)
1097                             && ((softc->sc_firsts[et] + softc->sc_counts[et])
1098                                 > eaddr)) {
1099                                 ces->ces_source_addr =
1100                                         eaddr - softc->sc_firsts[et];
1101                                 ces->ces_source_type = et;
1102                                 ces->ces_flags |= CES_SOURCE_VALID;
1103                                 break;
1104                         }
1105                 }
1106
1107                 if (!(ces->ces_flags & CES_SOURCE_VALID))
1108                         printf("ch: warning: could not map element source "
1109                                "address %ud to a valid element type\n",
1110                                eaddr);
1111         }
1112
1113         /*
1114          * pvoltag and avoltag are common between SCSI-2 and later versions
1115          */
1116         if (flags & READ_ELEMENT_STATUS_PVOLTAG)
1117                 pvol_tag = &desc->voltag_devid.pvoltag;
1118         if (flags & READ_ELEMENT_STATUS_AVOLTAG)
1119                 avol_tag = (flags & READ_ELEMENT_STATUS_PVOLTAG) ?
1120                     &desc->voltag_devid.voltag[1] :&desc->voltag_devid.pvoltag;
1121         /*
1122          * For SCSI-3 and later, element status can carry designator and
1123          * other information.
1124          */
1125         if (scsi_version >= SCSI_REV_SPC) {
1126                 if ((flags & READ_ELEMENT_STATUS_PVOLTAG) ^
1127                     (flags & READ_ELEMENT_STATUS_AVOLTAG))
1128                         devid = &desc->voltag_devid.pvol_and_devid.devid;
1129                 else if (!(flags & READ_ELEMENT_STATUS_PVOLTAG) &&
1130                          !(flags & READ_ELEMENT_STATUS_AVOLTAG))
1131                         devid = &desc->voltag_devid.devid;
1132                 else /* Have both PVOLTAG and AVOLTAG */
1133                         devid = &desc->voltag_devid.vol_tags_and_devid.devid;
1134         }
1135
1136         if (pvol_tag)
1137                 copy_voltag(&(ces->ces_pvoltag), pvol_tag);
1138         if (avol_tag)
1139                 copy_voltag(&(ces->ces_pvoltag), avol_tag);
1140         if (devid != NULL) {
1141                 if (devid->designator_length > 0) {
1142                         bcopy((void *)devid->designator,
1143                               (void *)ces->ces_designator,
1144                               devid->designator_length);
1145                         ces->ces_designator_length = devid->designator_length;
1146                         /*
1147                          * Make sure we are always NUL terminated.  The
1148                          * This won't matter for the binary code set,
1149                          * since the user will only pay attention to the
1150                          * length field.
1151                          */
1152                         ces->ces_designator[devid->designator_length]= '\0';
1153                 }
1154                 if (devid->piv_assoc_designator_type &
1155                     READ_ELEMENT_STATUS_PIV_SET) {
1156                         ces->ces_flags |= CES_PIV;
1157                         ces->ces_protocol_id =
1158                             READ_ELEMENT_STATUS_PROTOCOL_ID(
1159                             devid->prot_code_set);
1160                 }
1161                 ces->ces_code_set =
1162                     READ_ELEMENT_STATUS_CODE_SET(devid->prot_code_set);
1163                 ces->ces_assoc = READ_ELEMENT_STATUS_ASSOCIATION(
1164                     devid->piv_assoc_designator_type);
1165                 ces->ces_designator_type = READ_ELEMENT_STATUS_DESIGNATOR_TYPE(
1166                     devid->piv_assoc_designator_type);
1167         } else if (scsi_version > SCSI_REV_2) {
1168                 /* SCSI-SPC and No devid, no designator */
1169                 ces->ces_designator_length = 0;
1170                 ces->ces_designator[0] = '\0';
1171                 ces->ces_protocol_id = CES_PROTOCOL_ID_FCP_4;
1172         }
1173
1174         if (scsi_version <= SCSI_REV_2) {
1175                 if (desc->dt_or_obsolete.scsi_2.dt_scsi_flags &
1176                     READ_ELEMENT_STATUS_DT_IDVALID) {
1177                         ces->ces_flags |= CES_SCSIID_VALID;
1178                         ces->ces_scsi_id =
1179                             desc->dt_or_obsolete.scsi_2.dt_scsi_addr;
1180                 }
1181
1182                 if (desc->dt_or_obsolete.scsi_2.dt_scsi_addr &
1183                     READ_ELEMENT_STATUS_DT_LUVALID) {
1184                         ces->ces_flags |= CES_LUN_VALID;
1185                         ces->ces_scsi_lun =
1186                             desc->dt_or_obsolete.scsi_2.dt_scsi_flags &
1187                             READ_ELEMENT_STATUS_DT_LUNMASK;
1188                 }
1189         }
1190 }
1191
1192 static int
1193 chgetelemstatus(struct cam_periph *periph, int scsi_version, u_long cmd,
1194                 struct changer_element_status_request *cesr)
1195 {
1196         struct read_element_status_header *st_hdr;
1197         struct read_element_status_page_header *pg_hdr;
1198         struct read_element_status_descriptor *desc;
1199         caddr_t data = NULL;
1200         size_t size, desclen;
1201         u_int avail, i;
1202         int curdata, dvcid, sense_flags;
1203         int try_no_dvcid = 0;
1204         struct changer_element_status *user_data = NULL;
1205         struct ch_softc *softc;
1206         union ccb *ccb;
1207         int chet = cesr->cesr_element_type;
1208         int error = 0;
1209         int want_voltags = (cesr->cesr_flags & CESR_VOLTAGS) ? 1 : 0;
1210
1211         softc = (struct ch_softc *)periph->softc;
1212
1213         /* perform argument checking */
1214
1215         /*
1216          * Perform a range check on the cesr_element_{base,count}
1217          * request argument fields.
1218          */
1219         if ((softc->sc_counts[chet] - cesr->cesr_element_base) <= 0
1220             || (cesr->cesr_element_base + cesr->cesr_element_count)
1221                 > softc->sc_counts[chet])
1222                 return (EINVAL);
1223
1224         /*
1225          * Request one descriptor for the given element type.  This
1226          * is used to determine the size of the descriptor so that
1227          * we can allocate enough storage for all of them.  We assume
1228          * that the first one can fit into 1k.
1229          */
1230         cam_periph_unlock(periph);
1231         data = (caddr_t)malloc(1024, M_DEVBUF, M_WAITOK);
1232
1233         cam_periph_lock(periph);
1234         ccb = cam_periph_getccb(periph, CAM_PRIORITY_NORMAL);
1235
1236         sense_flags = SF_RETRY_UA;
1237         if (softc->quirks & CH_Q_NO_DVCID) {
1238                 dvcid = 0;
1239                 curdata = 0;
1240         } else {
1241                 dvcid = 1;
1242                 curdata = 1;
1243                 /*
1244                  * Don't print anything for an Illegal Request, because
1245                  * these flags can cause some changers to complain.  We'll
1246                  * retry without them if we get an error.
1247                  */
1248                 sense_flags |= SF_QUIET_IR;
1249         }
1250
1251 retry_einval:
1252
1253         scsi_read_element_status(&ccb->csio,
1254                                  /* retries */ 1,
1255                                  /* cbfcnp */ chdone,
1256                                  /* tag_action */ MSG_SIMPLE_Q_TAG,
1257                                  /* voltag */ want_voltags,
1258                                  /* sea */ softc->sc_firsts[chet],
1259                                  /* curdata */ curdata,
1260                                  /* dvcid */ dvcid,
1261                                  /* count */ 1,
1262                                  /* data_ptr */ data,
1263                                  /* dxfer_len */ 1024,
1264                                  /* sense_len */ SSD_FULL_SIZE,
1265                                  /* timeout */ CH_TIMEOUT_READ_ELEMENT_STATUS);
1266
1267         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
1268                                   /*sense_flags*/ sense_flags,
1269                                   softc->device_stats);
1270
1271         /*
1272          * An Illegal Request sense key (only used if there is no asc/ascq)
1273          * or 0x24,0x00 for an ASC/ASCQ both map to EINVAL.  If dvcid or
1274          * curdata are set (we set both or neither), try turning them off
1275          * and see if the command is successful.
1276          */
1277         if ((error == EINVAL)
1278          && (dvcid || curdata))  {
1279                 dvcid = 0;
1280                 curdata = 0;
1281                 error = 0;
1282                 /* At this point we want to report any Illegal Request */
1283                 sense_flags &= ~SF_QUIET_IR;
1284                 try_no_dvcid = 1;
1285                 goto retry_einval;
1286         }
1287
1288         /*
1289          * In this case, we tried a read element status with dvcid and
1290          * curdata set, and it failed.  We retried without those bits, and
1291          * it succeeded.  Suggest to the user that he set a quirk, so we
1292          * don't go through the retry process the first time in the future.
1293          * This should only happen on changers that claim SCSI-3 or higher,
1294          * but don't support these bits.
1295          */
1296         if ((try_no_dvcid != 0)
1297          && (error == 0))
1298                 softc->quirks |= CH_Q_NO_DVCID;
1299
1300         if (error)
1301                 goto done;
1302         cam_periph_unlock(periph);
1303
1304         st_hdr = (struct read_element_status_header *)data;
1305         pg_hdr = (struct read_element_status_page_header *)((uintptr_t)st_hdr +
1306                   sizeof(struct read_element_status_header));
1307         desclen = scsi_2btoul(pg_hdr->edl);
1308
1309         size = sizeof(struct read_element_status_header) +
1310                sizeof(struct read_element_status_page_header) +
1311                (desclen * cesr->cesr_element_count);
1312         /*
1313          * Reallocate storage for descriptors and get them from the
1314          * device.
1315          */
1316         free(data, M_DEVBUF);
1317         data = (caddr_t)malloc(size, M_DEVBUF, M_WAITOK);
1318
1319         cam_periph_lock(periph);
1320         scsi_read_element_status(&ccb->csio,
1321                                  /* retries */ 1,
1322                                  /* cbfcnp */ chdone,
1323                                  /* tag_action */ MSG_SIMPLE_Q_TAG,
1324                                  /* voltag */ want_voltags,
1325                                  /* sea */ softc->sc_firsts[chet]
1326                                  + cesr->cesr_element_base,
1327                                  /* curdata */ curdata,
1328                                  /* dvcid */ dvcid,
1329                                  /* count */ cesr->cesr_element_count,
1330                                  /* data_ptr */ data,
1331                                  /* dxfer_len */ size,
1332                                  /* sense_len */ SSD_FULL_SIZE,
1333                                  /* timeout */ CH_TIMEOUT_READ_ELEMENT_STATUS);
1334
1335         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
1336                                   /*sense_flags*/ SF_RETRY_UA,
1337                                   softc->device_stats);
1338
1339         if (error)
1340                 goto done;
1341         cam_periph_unlock(periph);
1342
1343         /*
1344          * Fill in the user status array.
1345          */
1346         st_hdr = (struct read_element_status_header *)data;
1347         pg_hdr = (struct read_element_status_page_header *)((uintptr_t)st_hdr +
1348                   sizeof(struct read_element_status_header));
1349         avail = scsi_2btoul(st_hdr->count);
1350
1351         if (avail != cesr->cesr_element_count) {
1352                 xpt_print(periph->path,
1353                     "warning, READ ELEMENT STATUS avail != count\n");
1354         }
1355
1356         user_data = (struct changer_element_status *)
1357                 malloc(avail * sizeof(struct changer_element_status),
1358                        M_DEVBUF, M_WAITOK | M_ZERO);
1359
1360         desc = (struct read_element_status_descriptor *)((uintptr_t)data +
1361                 sizeof(struct read_element_status_header) +
1362                 sizeof(struct read_element_status_page_header));
1363         /*
1364          * Set up the individual element status structures
1365          */
1366         for (i = 0; i < avail; ++i) {
1367                 struct changer_element_status *ces;
1368
1369                 /*
1370                  * In the changer_element_status structure, fields from
1371                  * the beginning to the field of ces_scsi_lun are common
1372                  * between SCSI-2 and SCSI-3, while all the rest are new
1373                  * from SCSI-3. In order to maintain backward compatibility
1374                  * of the chio command, the ces pointer, below, is computed
1375                  * such that it lines up with the structure boundary
1376                  * corresponding to the SCSI version.
1377                  */
1378                 ces = cmd == OCHIOGSTATUS ?
1379                     (struct changer_element_status *)
1380                     ((unsigned char *)user_data + i *
1381                      (offsetof(struct changer_element_status,ces_scsi_lun)+1)):
1382                     &user_data[i];
1383
1384                 copy_element_status(softc, pg_hdr->flags, desc,
1385                                     ces, scsi_version);
1386
1387                 desc = (struct read_element_status_descriptor *)
1388                        ((unsigned char *)desc + desclen);
1389         }
1390
1391         /* Copy element status structures out to userspace. */
1392         if (cmd == OCHIOGSTATUS)
1393                 error = copyout(user_data,
1394                                 cesr->cesr_element_status,
1395                                 avail* (offsetof(struct changer_element_status,
1396                                 ces_scsi_lun) + 1));
1397         else
1398                 error = copyout(user_data,
1399                                 cesr->cesr_element_status,
1400                                 avail * sizeof(struct changer_element_status));
1401
1402         cam_periph_lock(periph);
1403
1404  done:
1405         xpt_release_ccb(ccb);
1406
1407         if (data != NULL)
1408                 free(data, M_DEVBUF);
1409         if (user_data != NULL)
1410                 free(user_data, M_DEVBUF);
1411
1412         return (error);
1413 }
1414
1415 static int
1416 chielem(struct cam_periph *periph,
1417         unsigned int timeout)
1418 {
1419         union ccb *ccb;
1420         struct ch_softc *softc;
1421         int error;
1422
1423         if (!timeout) {
1424                 timeout = CH_TIMEOUT_INITIALIZE_ELEMENT_STATUS;
1425         } else {
1426                 timeout *= 1000;
1427         }
1428
1429         error = 0;
1430         softc = (struct ch_softc *)periph->softc;
1431
1432         ccb = cam_periph_getccb(periph, CAM_PRIORITY_NORMAL);
1433
1434         scsi_initialize_element_status(&ccb->csio,
1435                                       /* retries */ 1,
1436                                       /* cbfcnp */ chdone,
1437                                       /* tag_action */ MSG_SIMPLE_Q_TAG,
1438                                       /* sense_len */ SSD_FULL_SIZE,
1439                                       /* timeout */ timeout);
1440
1441         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
1442                                   /*sense_flags*/ SF_RETRY_UA,
1443                                   softc->device_stats);
1444
1445         xpt_release_ccb(ccb);
1446
1447         return(error);
1448 }
1449
1450 static int
1451 chsetvoltag(struct cam_periph *periph,
1452             struct changer_set_voltag_request *csvr)
1453 {
1454         union ccb *ccb;
1455         struct ch_softc *softc;
1456         u_int16_t ea;
1457         u_int8_t sac;
1458         struct scsi_send_volume_tag_parameters ssvtp;
1459         int error;
1460         int i;
1461
1462         error = 0;
1463         softc = (struct ch_softc *)periph->softc;
1464
1465         bzero(&ssvtp, sizeof(ssvtp));
1466         for (i=0; i<sizeof(ssvtp.vitf); i++) {
1467                 ssvtp.vitf[i] = ' ';
1468         }
1469
1470         /*
1471          * Check arguments.
1472          */
1473         if (csvr->csvr_type > CHET_DT)
1474                 return EINVAL;
1475         if (csvr->csvr_addr > (softc->sc_counts[csvr->csvr_type] - 1))
1476                 return ENODEV;
1477
1478         ea = softc->sc_firsts[csvr->csvr_type] + csvr->csvr_addr;
1479
1480         if (csvr->csvr_flags & CSVR_ALTERNATE) {
1481                 switch (csvr->csvr_flags & CSVR_MODE_MASK) {
1482                 case CSVR_MODE_SET:
1483                         sac = SEND_VOLUME_TAG_ASSERT_ALTERNATE;
1484                         break;
1485                 case CSVR_MODE_REPLACE:
1486                         sac = SEND_VOLUME_TAG_REPLACE_ALTERNATE;
1487                         break;
1488                 case CSVR_MODE_CLEAR:
1489                         sac = SEND_VOLUME_TAG_UNDEFINED_ALTERNATE;
1490                         break;
1491                 default:
1492                         error = EINVAL;
1493                         goto out;
1494                 }
1495         } else {
1496                 switch (csvr->csvr_flags & CSVR_MODE_MASK) {
1497                 case CSVR_MODE_SET:
1498                         sac = SEND_VOLUME_TAG_ASSERT_PRIMARY;
1499                         break;
1500                 case CSVR_MODE_REPLACE:
1501                         sac = SEND_VOLUME_TAG_REPLACE_PRIMARY;
1502                         break;
1503                 case CSVR_MODE_CLEAR:
1504                         sac = SEND_VOLUME_TAG_UNDEFINED_PRIMARY;
1505                         break;
1506                 default:
1507                         error = EINVAL;
1508                         goto out;
1509                 }
1510         }
1511
1512         memcpy(ssvtp.vitf, csvr->csvr_voltag.cv_volid,
1513                min(strlen(csvr->csvr_voltag.cv_volid), sizeof(ssvtp.vitf)));
1514         scsi_ulto2b(csvr->csvr_voltag.cv_serial, ssvtp.minvsn);
1515
1516         ccb = cam_periph_getccb(periph, CAM_PRIORITY_NORMAL);
1517
1518         scsi_send_volume_tag(&ccb->csio,
1519                              /* retries */ 1,
1520                              /* cbfcnp */ chdone,
1521                              /* tag_action */ MSG_SIMPLE_Q_TAG,
1522                              /* element_address */ ea,
1523                              /* send_action_code */ sac,
1524                              /* parameters */ &ssvtp,
1525                              /* sense_len */ SSD_FULL_SIZE,
1526                              /* timeout */ CH_TIMEOUT_SEND_VOLTAG);
1527
1528         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
1529                                   /*sense_flags*/ SF_RETRY_UA,
1530                                   softc->device_stats);
1531
1532         xpt_release_ccb(ccb);
1533
1534  out:
1535         return error;
1536 }
1537
1538 static int
1539 chgetparams(struct cam_periph *periph)
1540 {
1541         union ccb *ccb;
1542         struct ch_softc *softc;
1543         void *mode_buffer;
1544         int mode_buffer_len;
1545         struct page_element_address_assignment *ea;
1546         struct page_device_capabilities *cap;
1547         int error, from, dbd;
1548         u_int8_t *moves, *exchanges;
1549
1550         error = 0;
1551
1552         softc = (struct ch_softc *)periph->softc;
1553
1554         ccb = cam_periph_getccb(periph, CAM_PRIORITY_NORMAL);
1555
1556         /*
1557          * The scsi_mode_sense_data structure is just a convenience
1558          * structure that allows us to easily calculate the worst-case
1559          * storage size of the mode sense buffer.
1560          */
1561         mode_buffer_len = sizeof(struct scsi_mode_sense_data);
1562
1563         mode_buffer = malloc(mode_buffer_len, M_SCSICH, M_NOWAIT);
1564
1565         if (mode_buffer == NULL) {
1566                 printf("chgetparams: couldn't malloc mode sense data\n");
1567                 xpt_release_ccb(ccb);
1568                 return(ENOSPC);
1569         }
1570
1571         bzero(mode_buffer, mode_buffer_len);
1572
1573         if (softc->quirks & CH_Q_NO_DBD)
1574                 dbd = FALSE;
1575         else
1576                 dbd = TRUE;
1577
1578         /*
1579          * Get the element address assignment page.
1580          */
1581         scsi_mode_sense(&ccb->csio,
1582                         /* retries */ 1,
1583                         /* cbfcnp */ chdone,
1584                         /* tag_action */ MSG_SIMPLE_Q_TAG,
1585                         /* dbd */ dbd,
1586                         /* pc */ SMS_PAGE_CTRL_CURRENT,
1587                         /* page */ CH_ELEMENT_ADDR_ASSIGN_PAGE,
1588                         /* param_buf */ (u_int8_t *)mode_buffer,
1589                         /* param_len */ mode_buffer_len,
1590                         /* sense_len */ SSD_FULL_SIZE,
1591                         /* timeout */ CH_TIMEOUT_MODE_SENSE);
1592
1593         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
1594                                   /* sense_flags */ SF_RETRY_UA|SF_NO_PRINT,
1595                                   softc->device_stats);
1596
1597         if (error) {
1598                 if (dbd) {
1599                         struct scsi_mode_sense_6 *sms;
1600
1601                         sms = (struct scsi_mode_sense_6 *)
1602                                 ccb->csio.cdb_io.cdb_bytes;
1603
1604                         sms->byte2 &= ~SMS_DBD;
1605                         error = cam_periph_runccb(ccb, cherror,
1606                                                   /*cam_flags*/ CAM_RETRY_SELTO,
1607                                                   /*sense_flags*/ SF_RETRY_UA,
1608                                                   softc->device_stats);
1609                 } else {
1610                         /*
1611                          * Since we disabled sense printing above, print
1612                          * out the sense here since we got an error.
1613                          */
1614                         scsi_sense_print(&ccb->csio);
1615                 }
1616
1617                 if (error) {
1618                         xpt_print(periph->path,
1619                             "chgetparams: error getting element "
1620                             "address page\n");
1621                         xpt_release_ccb(ccb);
1622                         free(mode_buffer, M_SCSICH);
1623                         return(error);
1624                 }
1625         }
1626
1627         ea = (struct page_element_address_assignment *)
1628                 find_mode_page_6((struct scsi_mode_header_6 *)mode_buffer);
1629
1630         softc->sc_firsts[CHET_MT] = scsi_2btoul(ea->mtea);
1631         softc->sc_counts[CHET_MT] = scsi_2btoul(ea->nmte);
1632         softc->sc_firsts[CHET_ST] = scsi_2btoul(ea->fsea);
1633         softc->sc_counts[CHET_ST] = scsi_2btoul(ea->nse);
1634         softc->sc_firsts[CHET_IE] = scsi_2btoul(ea->fieea);
1635         softc->sc_counts[CHET_IE] = scsi_2btoul(ea->niee);
1636         softc->sc_firsts[CHET_DT] = scsi_2btoul(ea->fdtea);
1637         softc->sc_counts[CHET_DT] = scsi_2btoul(ea->ndte);
1638
1639         bzero(mode_buffer, mode_buffer_len);
1640
1641         /*
1642          * Now get the device capabilities page.
1643          */
1644         scsi_mode_sense(&ccb->csio,
1645                         /* retries */ 1,
1646                         /* cbfcnp */ chdone,
1647                         /* tag_action */ MSG_SIMPLE_Q_TAG,
1648                         /* dbd */ dbd,
1649                         /* pc */ SMS_PAGE_CTRL_CURRENT,
1650                         /* page */ CH_DEVICE_CAP_PAGE,
1651                         /* param_buf */ (u_int8_t *)mode_buffer,
1652                         /* param_len */ mode_buffer_len,
1653                         /* sense_len */ SSD_FULL_SIZE,
1654                         /* timeout */ CH_TIMEOUT_MODE_SENSE);
1655
1656         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
1657                                   /* sense_flags */ SF_RETRY_UA | SF_NO_PRINT,
1658                                   softc->device_stats);
1659
1660         if (error) {
1661                 if (dbd) {
1662                         struct scsi_mode_sense_6 *sms;
1663
1664                         sms = (struct scsi_mode_sense_6 *)
1665                                 ccb->csio.cdb_io.cdb_bytes;
1666
1667                         sms->byte2 &= ~SMS_DBD;
1668                         error = cam_periph_runccb(ccb, cherror,
1669                                                   /*cam_flags*/ CAM_RETRY_SELTO,
1670                                                   /*sense_flags*/ SF_RETRY_UA,
1671                                                   softc->device_stats);
1672                 } else {
1673                         /*
1674                          * Since we disabled sense printing above, print
1675                          * out the sense here since we got an error.
1676                          */
1677                         scsi_sense_print(&ccb->csio);
1678                 }
1679
1680                 if (error) {
1681                         xpt_print(periph->path,
1682                             "chgetparams: error getting device "
1683                             "capabilities page\n");
1684                         xpt_release_ccb(ccb);
1685                         free(mode_buffer, M_SCSICH);
1686                         return(error);
1687                 }
1688         }
1689
1690         xpt_release_ccb(ccb);
1691
1692         cap = (struct page_device_capabilities *)
1693                 find_mode_page_6((struct scsi_mode_header_6 *)mode_buffer);
1694
1695         bzero(softc->sc_movemask, sizeof(softc->sc_movemask));
1696         bzero(softc->sc_exchangemask, sizeof(softc->sc_exchangemask));
1697         moves = cap->move_from;
1698         exchanges = cap->exchange_with;
1699         for (from = CHET_MT; from <= CHET_MAX; ++from) {
1700                 softc->sc_movemask[from] = moves[from];
1701                 softc->sc_exchangemask[from] = exchanges[from];
1702         }
1703
1704         free(mode_buffer, M_SCSICH);
1705
1706         return(error);
1707 }
1708
1709 static int
1710 chscsiversion(struct cam_periph *periph)
1711 {
1712         struct scsi_inquiry_data *inq_data;
1713         struct ccb_getdev *cgd;
1714         int dev_scsi_version;
1715
1716         cam_periph_assert(periph, MA_OWNED);
1717         if ((cgd = (struct ccb_getdev *)xpt_alloc_ccb_nowait()) == NULL)
1718                 return (-1);
1719         /*
1720          * Get the device information.
1721          */
1722         xpt_setup_ccb(&cgd->ccb_h,
1723                       periph->path,
1724                       CAM_PRIORITY_NORMAL);
1725         cgd->ccb_h.func_code = XPT_GDEV_TYPE;
1726         xpt_action((union ccb *)cgd);
1727
1728         if (cgd->ccb_h.status != CAM_REQ_CMP) {
1729                 xpt_free_ccb((union ccb *)cgd);
1730                 return -1;
1731         }
1732
1733         inq_data = &cgd->inq_data;
1734         dev_scsi_version = inq_data->version;
1735         xpt_free_ccb((union ccb *)cgd);
1736
1737         return dev_scsi_version;
1738 }
1739
1740 void
1741 scsi_move_medium(struct ccb_scsiio *csio, u_int32_t retries,
1742                  void (*cbfcnp)(struct cam_periph *, union ccb *),
1743                  u_int8_t tag_action, u_int32_t tea, u_int32_t src,
1744                  u_int32_t dst, int invert, u_int8_t sense_len,
1745                  u_int32_t timeout)
1746 {
1747         struct scsi_move_medium *scsi_cmd;
1748
1749         scsi_cmd = (struct scsi_move_medium *)&csio->cdb_io.cdb_bytes;
1750         bzero(scsi_cmd, sizeof(*scsi_cmd));
1751
1752         scsi_cmd->opcode = MOVE_MEDIUM;
1753
1754         scsi_ulto2b(tea, scsi_cmd->tea);
1755         scsi_ulto2b(src, scsi_cmd->src);
1756         scsi_ulto2b(dst, scsi_cmd->dst);
1757
1758         if (invert)
1759                 scsi_cmd->invert |= MOVE_MEDIUM_INVERT;
1760
1761         cam_fill_csio(csio,
1762                       retries,
1763                       cbfcnp,
1764                       /*flags*/ CAM_DIR_NONE,
1765                       tag_action,
1766                       /*data_ptr*/ NULL,
1767                       /*dxfer_len*/ 0,
1768                       sense_len,
1769                       sizeof(*scsi_cmd),
1770                       timeout);
1771 }
1772
1773 void
1774 scsi_exchange_medium(struct ccb_scsiio *csio, u_int32_t retries,
1775                      void (*cbfcnp)(struct cam_periph *, union ccb *),
1776                      u_int8_t tag_action, u_int32_t tea, u_int32_t src,
1777                      u_int32_t dst1, u_int32_t dst2, int invert1,
1778                      int invert2, u_int8_t sense_len, u_int32_t timeout)
1779 {
1780         struct scsi_exchange_medium *scsi_cmd;
1781
1782         scsi_cmd = (struct scsi_exchange_medium *)&csio->cdb_io.cdb_bytes;
1783         bzero(scsi_cmd, sizeof(*scsi_cmd));
1784
1785         scsi_cmd->opcode = EXCHANGE_MEDIUM;
1786
1787         scsi_ulto2b(tea, scsi_cmd->tea);
1788         scsi_ulto2b(src, scsi_cmd->src);
1789         scsi_ulto2b(dst1, scsi_cmd->fdst);
1790         scsi_ulto2b(dst2, scsi_cmd->sdst);
1791
1792         if (invert1)
1793                 scsi_cmd->invert |= EXCHANGE_MEDIUM_INV1;
1794
1795         if (invert2)
1796                 scsi_cmd->invert |= EXCHANGE_MEDIUM_INV2;
1797
1798         cam_fill_csio(csio,
1799                       retries,
1800                       cbfcnp,
1801                       /*flags*/ CAM_DIR_NONE,
1802                       tag_action,
1803                       /*data_ptr*/ NULL,
1804                       /*dxfer_len*/ 0,
1805                       sense_len,
1806                       sizeof(*scsi_cmd),
1807                       timeout);
1808 }
1809
1810 void
1811 scsi_position_to_element(struct ccb_scsiio *csio, u_int32_t retries,
1812                          void (*cbfcnp)(struct cam_periph *, union ccb *),
1813                          u_int8_t tag_action, u_int32_t tea, u_int32_t dst,
1814                          int invert, u_int8_t sense_len, u_int32_t timeout)
1815 {
1816         struct scsi_position_to_element *scsi_cmd;
1817
1818         scsi_cmd = (struct scsi_position_to_element *)&csio->cdb_io.cdb_bytes;
1819         bzero(scsi_cmd, sizeof(*scsi_cmd));
1820
1821         scsi_cmd->opcode = POSITION_TO_ELEMENT;
1822
1823         scsi_ulto2b(tea, scsi_cmd->tea);
1824         scsi_ulto2b(dst, scsi_cmd->dst);
1825
1826         if (invert)
1827                 scsi_cmd->invert |= POSITION_TO_ELEMENT_INVERT;
1828
1829         cam_fill_csio(csio,
1830                       retries,
1831                       cbfcnp,
1832                       /*flags*/ CAM_DIR_NONE,
1833                       tag_action,
1834                       /*data_ptr*/ NULL,
1835                       /*dxfer_len*/ 0,
1836                       sense_len,
1837                       sizeof(*scsi_cmd),
1838                       timeout);
1839 }
1840
1841 void
1842 scsi_read_element_status(struct ccb_scsiio *csio, u_int32_t retries,
1843                          void (*cbfcnp)(struct cam_periph *, union ccb *),
1844                          u_int8_t tag_action, int voltag, u_int32_t sea,
1845                          int curdata, int dvcid,
1846                          u_int32_t count, u_int8_t *data_ptr,
1847                          u_int32_t dxfer_len, u_int8_t sense_len,
1848                          u_int32_t timeout)
1849 {
1850         struct scsi_read_element_status *scsi_cmd;
1851
1852         scsi_cmd = (struct scsi_read_element_status *)&csio->cdb_io.cdb_bytes;
1853         bzero(scsi_cmd, sizeof(*scsi_cmd));
1854
1855         scsi_cmd->opcode = READ_ELEMENT_STATUS;
1856
1857         scsi_ulto2b(sea, scsi_cmd->sea);
1858         scsi_ulto2b(count, scsi_cmd->count);
1859         scsi_ulto3b(dxfer_len, scsi_cmd->len);
1860         if (dvcid)
1861                 scsi_cmd->flags |= READ_ELEMENT_STATUS_DVCID;
1862         if (curdata)
1863                 scsi_cmd->flags |= READ_ELEMENT_STATUS_CURDATA;
1864
1865         if (voltag)
1866                 scsi_cmd->byte2 |= READ_ELEMENT_STATUS_VOLTAG;
1867
1868         cam_fill_csio(csio,
1869                       retries,
1870                       cbfcnp,
1871                       /*flags*/ CAM_DIR_IN,
1872                       tag_action,
1873                       data_ptr,
1874                       dxfer_len,
1875                       sense_len,
1876                       sizeof(*scsi_cmd),
1877                       timeout);
1878 }
1879
1880 void
1881 scsi_initialize_element_status(struct ccb_scsiio *csio, u_int32_t retries,
1882                                void (*cbfcnp)(struct cam_periph *, union ccb *),
1883                                u_int8_t tag_action, u_int8_t sense_len,
1884                                u_int32_t timeout)
1885 {
1886         struct scsi_initialize_element_status *scsi_cmd;
1887
1888         scsi_cmd = (struct scsi_initialize_element_status *)
1889                     &csio->cdb_io.cdb_bytes;
1890         bzero(scsi_cmd, sizeof(*scsi_cmd));
1891
1892         scsi_cmd->opcode = INITIALIZE_ELEMENT_STATUS;
1893
1894         cam_fill_csio(csio,
1895                       retries,
1896                       cbfcnp,
1897                       /*flags*/ CAM_DIR_NONE,
1898                       tag_action,
1899                       /* data_ptr */ NULL,
1900                       /* dxfer_len */ 0,
1901                       sense_len,
1902                       sizeof(*scsi_cmd),
1903                       timeout);
1904 }
1905
1906 void
1907 scsi_send_volume_tag(struct ccb_scsiio *csio, u_int32_t retries,
1908                      void (*cbfcnp)(struct cam_periph *, union ccb *),
1909                      u_int8_t tag_action,
1910                      u_int16_t element_address,
1911                      u_int8_t send_action_code,
1912                      struct scsi_send_volume_tag_parameters *parameters,
1913                      u_int8_t sense_len, u_int32_t timeout)
1914 {
1915         struct scsi_send_volume_tag *scsi_cmd;
1916
1917         scsi_cmd = (struct scsi_send_volume_tag *) &csio->cdb_io.cdb_bytes;
1918         bzero(scsi_cmd, sizeof(*scsi_cmd));
1919
1920         scsi_cmd->opcode = SEND_VOLUME_TAG;
1921         scsi_ulto2b(element_address, scsi_cmd->ea);
1922         scsi_cmd->sac = send_action_code;
1923         scsi_ulto2b(sizeof(*parameters), scsi_cmd->pll);
1924
1925         cam_fill_csio(csio,
1926                       retries,
1927                       cbfcnp,
1928                       /*flags*/ CAM_DIR_OUT,
1929                       tag_action,
1930                       /* data_ptr */ (u_int8_t *) parameters,
1931                       sizeof(*parameters),
1932                       sense_len,
1933                       sizeof(*scsi_cmd),
1934                       timeout);
1935 }