sys/cam/scsi/scsi_ch.c

   1 /*-
   2  * Copyright (c) 1997 Justin T. Gibbs.
   3  * Copyright (c) 1997, 1998, 1999 Kenneth D. Merry.
   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  *    without modification, immediately at the beginning of the file.
  12  * 2. The name of the author may not be used to endorse or promote products
  13  *    derived from this software without specific prior written permission.
  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 FOR
  19  * 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 /*
  29  * Derived from the NetBSD SCSI changer driver.
  30  *
  31  *      $NetBSD: ch.c,v 1.32 1998/01/12 09:49:12 thorpej Exp $
  32  *
  33  */
  34 /*-
  35  * Copyright (c) 1996, 1997 Jason R. Thorpe <thorpej@and.com>
  36  * All rights reserved.
  37  *
  38  * Partially based on an autochanger driver written by Stefan Grefen
  39  * and on an autochanger driver written by the Systems Programming Group
  40  * at the University of Utah Computer Science Department.
  41  *
  42  * Redistribution and use in source and binary forms, with or without
  43  * modification, are permitted provided that the following conditions
  44  * are met:
  45  * 1. Redistributions of source code must retain the above copyright
  46  *    notice, this list of conditions and the following disclaimer.
  47  * 2. Redistributions in binary form must reproduce the above copyright
  48  *    notice, this list of conditions and the following disclaimer in the
  49  *    documentation and/or other materials provided with the distribution.
  50  * 3. All advertising materials mentioning features or use of this software
  51  *    must display the following acknowledgements:
  52  *      This product includes software developed by Jason R. Thorpe
  53  *      for And Communications, http://www.and.com/
  54  * 4. The name of the author may not be used to endorse or promote products
  55  *    derived from this software without specific prior written permission.
  56  *
  57  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  58  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  59  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  60  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  61  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
  62  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  63  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  64  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  65  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  66  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  67  * SUCH DAMAGE.
  68  */
  69
  70 #include <sys/cdefs.h>
  71 __FBSDID("$FreeBSD$");
  72
  73 #include <sys/param.h>
  74 #include <sys/queue.h>
  75 #include <sys/systm.h>
  76 #include <sys/kernel.h>
  77 #include <sys/types.h>
  78 #include <sys/malloc.h>
  79 #include <sys/fcntl.h>
  80 #include <sys/conf.h>
  81 #include <sys/chio.h>
  82 #include <sys/errno.h>
  83 #include <sys/devicestat.h>
  84
  85 #include <cam/cam.h>
  86 #include <cam/cam_ccb.h>
  87 #include <cam/cam_periph.h>
  88 #include <cam/cam_xpt_periph.h>
  89 #include <cam/cam_debug.h>
  90
  91 #include <cam/scsi/scsi_all.h>
  92 #include <cam/scsi/scsi_message.h>
  93 #include <cam/scsi/scsi_ch.h>
  94
  95 /*
  96  * Timeout definitions for various changer related commands.  They may
  97  * be too short for some devices (especially the timeout for INITIALIZE
  98  * ELEMENT STATUS).
  99  */
 100
 101 static const u_int32_t  CH_TIMEOUT_MODE_SENSE                = 6000;
 102 static const u_int32_t  CH_TIMEOUT_MOVE_MEDIUM               = 15 * 60 * 1000;
 103 static const u_int32_t  CH_TIMEOUT_EXCHANGE_MEDIUM           = 15 * 60 * 1000;
 104 static const u_int32_t  CH_TIMEOUT_POSITION_TO_ELEMENT       = 15 * 60 * 1000;
 105 static const u_int32_t  CH_TIMEOUT_READ_ELEMENT_STATUS       = 5 * 60 * 1000;
 106 static const u_int32_t  CH_TIMEOUT_SEND_VOLTAG               = 10000;
 107 static const u_int32_t  CH_TIMEOUT_INITIALIZE_ELEMENT_STATUS = 500000;
 108
 109 typedef enum {
 110         CH_FLAG_INVALID         = 0x001
 111 } ch_flags;
 112
 113 typedef enum {
 114         CH_STATE_PROBE,
 115         CH_STATE_NORMAL
 116 } ch_state;
 117
 118 typedef enum {
 119         CH_CCB_PROBE,
 120         CH_CCB_WAITING
 121 } ch_ccb_types;
 122
 123 typedef enum {
 124         CH_Q_NONE       = 0x00,
 125         CH_Q_NO_DBD     = 0x01,
 126         CH_Q_NO_DVCID   = 0x02
 127 } ch_quirks;
 128
 129 #define CH_Q_BIT_STRING \
 130         "\020"          \
 131         "\001NO_DBD"    \
 132         "\002NO_DVCID"
 133
 134 #define ccb_state       ppriv_field0
 135 #define ccb_bp          ppriv_ptr1
 136
 137 struct scsi_mode_sense_data {
 138         struct scsi_mode_header_6 header;
 139         struct scsi_mode_blk_desc blk_desc;
 140         union {
 141                 struct page_element_address_assignment ea;
 142                 struct page_transport_geometry_parameters tg;
 143                 struct page_device_capabilities cap;
 144         } pages;
 145 };
 146
 147 struct ch_softc {
 148         ch_flags        flags;
 149         ch_state        state;
 150         ch_quirks       quirks;
 151         union ccb       saved_ccb;
 152         struct devstat  *device_stats;
 153         struct cdev     *dev;
 154         int             open_count;
 155
 156         int             sc_picker;      /* current picker */
 157
 158         /*
 159          * The following information is obtained from the
 160          * element address assignment page.
 161          */
 162         int             sc_firsts[CHET_MAX + 1];        /* firsts */
 163         int             sc_counts[CHET_MAX + 1];        /* counts */
 164
 165         /*
 166          * The following mask defines the legal combinations
 167          * of elements for the MOVE MEDIUM command.
 168          */
 169         u_int8_t        sc_movemask[CHET_MAX + 1];
 170
 171         /*
 172          * As above, but for EXCHANGE MEDIUM.
 173          */
 174         u_int8_t        sc_exchangemask[CHET_MAX + 1];
 175
 176         /*
 177          * Quirks; see below.  XXX KDM not implemented yet
 178          */
 179         int             sc_settledelay; /* delay for settle */
 180 };
 181
 182 static  d_open_t        chopen;
 183 static  d_close_t       chclose;
 184 static  d_ioctl_t       chioctl;
 185 static  periph_init_t   chinit;
 186 static  periph_ctor_t   chregister;
 187 static  periph_oninv_t  choninvalidate;
 188 static  periph_dtor_t   chcleanup;
 189 static  periph_start_t  chstart;
 190 static  void            chasync(void *callback_arg, u_int32_t code,
 191                                 struct cam_path *path, void *arg);
 192 static  void            chdone(struct cam_periph *periph,
 193                                union ccb *done_ccb);
 194 static  int             cherror(union ccb *ccb, u_int32_t cam_flags,
 195                                 u_int32_t sense_flags);
 196 static  int             chmove(struct cam_periph *periph,
 197                                struct changer_move *cm);
 198 static  int             chexchange(struct cam_periph *periph,
 199                                    struct changer_exchange *ce);
 200 static  int             chposition(struct cam_periph *periph,
 201                                    struct changer_position *cp);
 202 static  int             chgetelemstatus(struct cam_periph *periph,
 203                                 int scsi_version, u_long cmd,
 204                                 struct changer_element_status_request *csr);
 205 static  int             chsetvoltag(struct cam_periph *periph,
 206                                     struct changer_set_voltag_request *csvr);
 207 static  int             chielem(struct cam_periph *periph,
 208                                 unsigned int timeout);
 209 static  int             chgetparams(struct cam_periph *periph);
 210 static  int             chscsiversion(struct cam_periph *periph);
 211
 212 static struct periph_driver chdriver =
 213 {
 214         chinit, "ch",
 215         TAILQ_HEAD_INITIALIZER(chdriver.units), /* generation */ 0
 216 };
 217
 218 PERIPHDRIVER_DECLARE(ch, chdriver);
 219
 220 static struct cdevsw ch_cdevsw = {
 221         .d_version =    D_VERSION,
 222         .d_flags =      D_TRACKCLOSE,
 223         .d_open =       chopen,
 224         .d_close =      chclose,
 225         .d_ioctl =      chioctl,
 226         .d_name =       "ch",
 227 };
 228
 229 static MALLOC_DEFINE(M_SCSICH, "scsi_ch", "scsi_ch buffers");
 230
 231 static void
 232 chinit(void)
 233 {
 234         cam_status status;
 235
 236         /*
 237          * Install a global async callback.  This callback will
 238          * receive async callbacks like "new device found".
 239          */
 240         status = xpt_register_async(AC_FOUND_DEVICE, chasync, NULL, NULL);
 241
 242         if (status != CAM_REQ_CMP) {
 243                 printf("ch: Failed to attach master async callback "
 244                        "due to status 0x%x!\n", status);
 245         }
 246 }
 247
 248 static void
 249 chdevgonecb(void *arg)
 250 {
 251         struct cam_sim    *sim;
 252         struct ch_softc   *softc;
 253         struct cam_periph *periph;
 254         int i;
 255
 256         periph = (struct cam_periph *)arg;
 257         sim = periph->sim;
 258         softc = (struct ch_softc *)periph->softc;
 259
 260         KASSERT(softc->open_count >= 0, ("Negative open count %d",
 261                 softc->open_count));
 262
 263         mtx_lock(sim->mtx);
 264
 265         /*
 266          * When we get this callback, we will get no more close calls from
 267          * devfs.  So if we have any dangling opens, we need to release the
 268          * reference held for that particular context.
 269          */
 270         for (i = 0; i < softc->open_count; i++)
 271                 cam_periph_release_locked(periph);
 272
 273         softc->open_count = 0;
 274
 275         /*
 276          * Release the reference held for the device node, it is gone now.
 277          */
 278         cam_periph_release_locked(periph);
 279
 280         /*
 281          * We reference the SIM lock directly here, instead of using
 282          * cam_periph_unlock().  The reason is that the final call to
 283          * cam_periph_release_locked() above could result in the periph
 284          * getting freed.  If that is the case, dereferencing the periph
 285          * with a cam_periph_unlock() call would cause a page fault.
 286          */
 287         mtx_unlock(sim->mtx);
 288 }
 289
 290 static void
 291 choninvalidate(struct cam_periph *periph)
 292 {
 293         struct ch_softc *softc;
 294
 295         softc = (struct ch_softc *)periph->softc;
 296
 297         /*
 298          * De-register any async callbacks.
 299          */
 300         xpt_register_async(0, chasync, periph, periph->path);
 301
 302         softc->flags |= CH_FLAG_INVALID;
 303
 304         /*
 305          * Tell devfs this device has gone away, and ask for a callback
 306          * when it has cleaned up its state.
 307          */
 308         destroy_dev_sched_cb(softc->dev, chdevgonecb, periph);
 309 }
 310
 311 static void
 312 chcleanup(struct cam_periph *periph)
 313 {
 314         struct ch_softc *softc;
 315
 316         softc = (struct ch_softc *)periph->softc;
 317
 318         devstat_remove_entry(softc->device_stats);
 319
 320         free(softc, M_DEVBUF);
 321 }
 322
 323 static void
 324 chasync(void *callback_arg, u_int32_t code, struct cam_path *path, void *arg)
 325 {
 326         struct cam_periph *periph;
 327
 328         periph = (struct cam_periph *)callback_arg;
 329
 330         switch(code) {
 331         case AC_FOUND_DEVICE:
 332         {
 333                 struct ccb_getdev *cgd;
 334                 cam_status status;
 335
 336                 cgd = (struct ccb_getdev *)arg;
 337                 if (cgd == NULL)
 338                         break;
 339
 340                 if (cgd->protocol != PROTO_SCSI)
 341                         break;
 342
 343                 if (SID_TYPE(&cgd->inq_data)!= T_CHANGER)
 344                         break;
 345
 346                 /*
 347                  * Allocate a peripheral instance for
 348                  * this device and start the probe
 349                  * process.
 350                  */
 351                 status = cam_periph_alloc(chregister, choninvalidate,
 352                                           chcleanup, chstart, "ch",
 353                                           CAM_PERIPH_BIO, cgd->ccb_h.path,
 354                                           chasync, AC_FOUND_DEVICE, cgd);
 355
 356                 if (status != CAM_REQ_CMP
 357                  && status != CAM_REQ_INPROG)
 358                         printf("chasync: Unable to probe new device "
 359                                "due to status 0x%x\n", status);
 360
 361                 break;
 362
 363         }
 364         default:
 365                 cam_periph_async(periph, code, path, arg);
 366                 break;
 367         }
 368 }
 369
 370 static cam_status
 371 chregister(struct cam_periph *periph, void *arg)
 372 {
 373         struct ch_softc *softc;
 374         struct ccb_getdev *cgd;
 375         struct ccb_pathinq cpi;
 376
 377         cgd = (struct ccb_getdev *)arg;
 378         if (cgd == NULL) {
 379                 printf("chregister: no getdev CCB, can't register device\n");
 380                 return(CAM_REQ_CMP_ERR);
 381         }
 382
 383         softc = (struct ch_softc *)malloc(sizeof(*softc),M_DEVBUF,M_NOWAIT);
 384
 385         if (softc == NULL) {
 386                 printf("chregister: Unable to probe new device. "
 387                        "Unable to allocate softc\n");
 388                 return(CAM_REQ_CMP_ERR);
 389         }
 390
 391         bzero(softc, sizeof(*softc));
 392         softc->state = CH_STATE_PROBE;
 393         periph->softc = softc;
 394         softc->quirks = CH_Q_NONE;
 395
 396         /*
 397          * The DVCID and CURDATA bits were not introduced until the SMC
 398          * spec.  If this device claims SCSI-2 or earlier support, then it
 399          * very likely does not support these bits.
 400          */
 401         if (cgd->inq_data.version <= SCSI_REV_2)
 402                 softc->quirks |= CH_Q_NO_DVCID;
 403
 404         bzero(&cpi, sizeof(cpi));
 405         xpt_setup_ccb(&cpi.ccb_h, periph->path, CAM_PRIORITY_NORMAL);
 406         cpi.ccb_h.func_code = XPT_PATH_INQ;
 407         xpt_action((union ccb *)&cpi);
 408
 409         /*
 410          * Changers don't have a blocksize, and obviously don't support
 411          * tagged queueing.
 412          */
 413         cam_periph_unlock(periph);
 414         softc->device_stats = devstat_new_entry("ch",
 415                           periph->unit_number, 0,
 416                           DEVSTAT_NO_BLOCKSIZE | DEVSTAT_NO_ORDERED_TAGS,
 417                           SID_TYPE(&cgd->inq_data) |
 418                           XPORT_DEVSTAT_TYPE(cpi.transport),
 419                           DEVSTAT_PRIORITY_OTHER);
 420
 421         /*
 422          * Acquire a reference to the periph before we create the devfs
 423          * instance for it.  We'll release this reference once the devfs
 424          * instance has been freed.
 425          */
 426         if (cam_periph_acquire(periph) != CAM_REQ_CMP) {
 427                 xpt_print(periph->path, "%s: lost periph during "
 428                           "registration!\n", __func__);
 429                 cam_periph_lock(periph);
 430                 return (CAM_REQ_CMP_ERR);
 431         }
 432
 433
 434         /* Register the device */
 435         softc->dev = make_dev(&ch_cdevsw, periph->unit_number, UID_ROOT,
 436                               GID_OPERATOR, 0600, "%s%d", periph->periph_name,
 437                               periph->unit_number);
 438         cam_periph_lock(periph);
 439         softc->dev->si_drv1 = periph;
 440
 441         /*
 442          * Add an async callback so that we get
 443          * notified if this device goes away.
 444          */
 445         xpt_register_async(AC_LOST_DEVICE, chasync, periph, periph->path);
 446
 447         /*
 448          * Lock this periph until we are setup.
 449          * This first call can't block
 450          */
 451         (void)cam_periph_hold(periph, PRIBIO);
 452         xpt_schedule(periph, CAM_PRIORITY_DEV);
 453
 454         return(CAM_REQ_CMP);
 455 }
 456
 457 static int
 458 chopen(struct cdev *dev, int flags, int fmt, struct thread *td)
 459 {
 460         struct cam_periph *periph;
 461         struct ch_softc *softc;
 462         int error;
 463
 464         periph = (struct cam_periph *)dev->si_drv1;
 465         if (cam_periph_acquire(periph) != CAM_REQ_CMP)
 466                 return (ENXIO);
 467
 468         softc = (struct ch_softc *)periph->softc;
 469
 470         cam_periph_lock(periph);
 471
 472         if (softc->flags & CH_FLAG_INVALID) {
 473                 cam_periph_release_locked(periph);
 474                 cam_periph_unlock(periph);
 475                 return(ENXIO);
 476         }
 477
 478         if ((error = cam_periph_hold(periph, PRIBIO | PCATCH)) != 0) {
 479                 cam_periph_unlock(periph);
 480                 cam_periph_release(periph);
 481                 return (error);
 482         }
 483
 484         /*
 485          * Load information about this changer device into the softc.
 486          */
 487         if ((error = chgetparams(periph)) != 0) {
 488                 cam_periph_unhold(periph);
 489                 cam_periph_release_locked(periph);
 490                 cam_periph_unlock(periph);
 491                 return(error);
 492         }
 493
 494         cam_periph_unhold(periph);
 495
 496         softc->open_count++;
 497
 498         cam_periph_unlock(periph);
 499
 500         return(error);
 501 }
 502
 503 static int
 504 chclose(struct cdev *dev, int flag, int fmt, struct thread *td)
 505 {
 506         struct  cam_sim *sim;
 507         struct  cam_periph *periph;
 508         struct  ch_softc *softc;
 509
 510         periph = (struct cam_periph *)dev->si_drv1;
 511         if (periph == NULL)
 512                 return(ENXIO);
 513
 514         sim = periph->sim;
 515         softc = (struct ch_softc *)periph->softc;
 516
 517         mtx_lock(sim->mtx);
 518
 519         softc->open_count--;
 520
 521         cam_periph_release_locked(periph);
 522
 523         /*
 524          * We reference the SIM lock directly here, instead of using
 525          * cam_periph_unlock().  The reason is that the call to
 526          * cam_periph_release_locked() above could result in the periph
 527          * getting freed.  If that is the case, dereferencing the periph
 528          * with a cam_periph_unlock() call would cause a page fault.
 529          *
 530          * cam_periph_release() avoids this problem using the same method,
 531          * but we're manually acquiring and dropping the lock here to
 532          * protect the open count and avoid another lock acquisition and
 533          * release.
 534          */
 535         mtx_unlock(sim->mtx);
 536
 537         return(0);
 538 }
 539
 540 static void
 541 chstart(struct cam_periph *periph, union ccb *start_ccb)
 542 {
 543         struct ch_softc *softc;
 544
 545         softc = (struct ch_softc *)periph->softc;
 546
 547         switch (softc->state) {
 548         case CH_STATE_NORMAL:
 549         {
 550                 if (periph->immediate_priority <= periph->pinfo.priority){
 551                         start_ccb->ccb_h.ccb_state = CH_CCB_WAITING;
 552
 553                         SLIST_INSERT_HEAD(&periph->ccb_list, &start_ccb->ccb_h,
 554                                           periph_links.sle);
 555                         periph->immediate_priority = CAM_PRIORITY_NONE;
 556                         wakeup(&periph->ccb_list);
 557                 }
 558                 break;
 559         }
 560         case CH_STATE_PROBE:
 561         {
 562                 int mode_buffer_len;
 563                 void *mode_buffer;
 564
 565                 /*
 566                  * Include the block descriptor when calculating the mode
 567                  * buffer length,
 568                  */
 569                 mode_buffer_len = sizeof(struct scsi_mode_header_6) +
 570                                   sizeof(struct scsi_mode_blk_desc) +
 571                                  sizeof(struct page_element_address_assignment);
 572
 573                 mode_buffer = malloc(mode_buffer_len, M_SCSICH, M_NOWAIT);
 574
 575                 if (mode_buffer == NULL) {
 576                         printf("chstart: couldn't malloc mode sense data\n");
 577                         break;
 578                 }
 579                 bzero(mode_buffer, mode_buffer_len);
 580
 581                 /*
 582                  * Get the element address assignment page.
 583                  */
 584                 scsi_mode_sense(&start_ccb->csio,
 585                                 /* retries */ 1,
 586                                 /* cbfcnp */ chdone,
 587                                 /* tag_action */ MSG_SIMPLE_Q_TAG,
 588                                 /* dbd */ (softc->quirks & CH_Q_NO_DBD) ?
 589                                         FALSE : TRUE,
 590                                 /* page_code */ SMS_PAGE_CTRL_CURRENT,
 591                                 /* page */ CH_ELEMENT_ADDR_ASSIGN_PAGE,
 592                                 /* param_buf */ (u_int8_t *)mode_buffer,
 593                                 /* param_len */ mode_buffer_len,
 594                                 /* sense_len */ SSD_FULL_SIZE,
 595                                 /* timeout */ CH_TIMEOUT_MODE_SENSE);
 596
 597                 start_ccb->ccb_h.ccb_bp = NULL;
 598                 start_ccb->ccb_h.ccb_state = CH_CCB_PROBE;
 599                 xpt_action(start_ccb);
 600                 break;
 601         }
 602         }
 603 }
 604
 605 static void
 606 chdone(struct cam_periph *periph, union ccb *done_ccb)
 607 {
 608         struct ch_softc *softc;
 609         struct ccb_scsiio *csio;
 610
 611         softc = (struct ch_softc *)periph->softc;
 612         csio = &done_ccb->csio;
 613
 614         switch(done_ccb->ccb_h.ccb_state) {
 615         case CH_CCB_PROBE:
 616         {
 617                 struct scsi_mode_header_6 *mode_header;
 618                 struct page_element_address_assignment *ea;
 619                 char announce_buf[80];
 620
 621
 622                 mode_header = (struct scsi_mode_header_6 *)csio->data_ptr;
 623
 624                 ea = (struct page_element_address_assignment *)
 625                         find_mode_page_6(mode_header);
 626
 627                 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP){
 628
 629                         softc->sc_firsts[CHET_MT] = scsi_2btoul(ea->mtea);
 630                         softc->sc_counts[CHET_MT] = scsi_2btoul(ea->nmte);
 631                         softc->sc_firsts[CHET_ST] = scsi_2btoul(ea->fsea);
 632                         softc->sc_counts[CHET_ST] = scsi_2btoul(ea->nse);
 633                         softc->sc_firsts[CHET_IE] = scsi_2btoul(ea->fieea);
 634                         softc->sc_counts[CHET_IE] = scsi_2btoul(ea->niee);
 635                         softc->sc_firsts[CHET_DT] = scsi_2btoul(ea->fdtea);
 636                         softc->sc_counts[CHET_DT] = scsi_2btoul(ea->ndte);
 637                         softc->sc_picker = softc->sc_firsts[CHET_MT];
 638
 639 #define PLURAL(c)       (c) == 1 ? "" : "s"
 640                         snprintf(announce_buf, sizeof(announce_buf),
 641                                 "%d slot%s, %d drive%s, "
 642                                 "%d picker%s, %d portal%s",
 643                                 softc->sc_counts[CHET_ST],
 644                                 PLURAL(softc->sc_counts[CHET_ST]),
 645                                 softc->sc_counts[CHET_DT],
 646                                 PLURAL(softc->sc_counts[CHET_DT]),
 647                                 softc->sc_counts[CHET_MT],
 648                                 PLURAL(softc->sc_counts[CHET_MT]),
 649                                 softc->sc_counts[CHET_IE],
 650                                 PLURAL(softc->sc_counts[CHET_IE]));
 651 #undef PLURAL
 652                         if (announce_buf[0] != '\0') {
 653                                 xpt_announce_periph(periph, announce_buf);
 654                                 xpt_announce_quirks(periph, softc->quirks,
 655                                     CH_Q_BIT_STRING);
 656                         }
 657                 } else {
 658                         int error;
 659
 660                         error = cherror(done_ccb, CAM_RETRY_SELTO,
 661                                         SF_RETRY_UA | SF_NO_PRINT);
 662                         /*
 663                          * Retry any UNIT ATTENTION type errors.  They
 664                          * are expected at boot.
 665                          */
 666                         if (error == ERESTART) {
 667                                 /*
 668                                  * A retry was scheuled, so
 669                                  * just return.
 670                                  */
 671                                 return;
 672                         } else if (error != 0) {
 673                                 int retry_scheduled;
 674                                 struct scsi_mode_sense_6 *sms;
 675
 676                                 sms = (struct scsi_mode_sense_6 *)
 677                                         done_ccb->csio.cdb_io.cdb_bytes;
 678
 679                                 /*
 680                                  * Check to see if block descriptors were
 681                                  * disabled.  Some devices don't like that.
 682                                  * We're taking advantage of the fact that
 683                                  * the first few bytes of the 6 and 10 byte
 684                                  * mode sense commands are the same.  If
 685                                  * block descriptors were disabled, enable
 686                                  * them and re-send the command.
 687                                  */
 688                                 if (sms->byte2 & SMS_DBD) {
 689                                         sms->byte2 &= ~SMS_DBD;
 690                                         xpt_action(done_ccb);
 691                                         softc->quirks |= CH_Q_NO_DBD;
 692                                         retry_scheduled = 1;
 693                                 } else
 694                                         retry_scheduled = 0;
 695
 696                                 /* Don't wedge this device's queue */
 697                                 if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
 698                                         cam_release_devq(done_ccb->ccb_h.path,
 699                                                  /*relsim_flags*/0,
 700                                                  /*reduction*/0,
 701                                                  /*timeout*/0,
 702                                                  /*getcount_only*/0);
 703
 704                                 if (retry_scheduled)
 705                                         return;
 706
 707                                 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK)
 708                                     == CAM_SCSI_STATUS_ERROR)
 709                                         scsi_sense_print(&done_ccb->csio);
 710                                 else {
 711                                         xpt_print(periph->path,
 712                                             "got CAM status %#x\n",
 713                                             done_ccb->ccb_h.status);
 714                                 }
 715                                 xpt_print(periph->path, "fatal error, failed "
 716                                     "to attach to device\n");
 717
 718                                 cam_periph_invalidate(periph);
 719
 720                         }
 721                 }
 722                 softc->state = CH_STATE_NORMAL;
 723                 free(mode_header, M_SCSICH);
 724                 /*
 725                  * Since our peripheral may be invalidated by an error
 726                  * above or an external event, we must release our CCB
 727                  * before releasing the probe lock on the peripheral.
 728                  * The peripheral will only go away once the last lock
 729                  * is removed, and we need it around for the CCB release
 730                  * operation.
 731                  */
 732                 xpt_release_ccb(done_ccb);
 733                 cam_periph_unhold(periph);
 734                 return;
 735         }
 736         case CH_CCB_WAITING:
 737         {
 738                 /* Caller will release the CCB */
 739                 wakeup(&done_ccb->ccb_h.cbfcnp);
 740                 return;
 741         }
 742         default:
 743                 break;
 744         }
 745         xpt_release_ccb(done_ccb);
 746 }
 747
 748 static int
 749 cherror(union ccb *ccb, u_int32_t cam_flags, u_int32_t sense_flags)
 750 {
 751         struct ch_softc *softc;
 752         struct cam_periph *periph;
 753
 754         periph = xpt_path_periph(ccb->ccb_h.path);
 755         softc = (struct ch_softc *)periph->softc;
 756
 757         return (cam_periph_error(ccb, cam_flags, sense_flags,
 758                                  &softc->saved_ccb));
 759 }
 760
 761 static int
 762 chioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
 763 {
 764         struct cam_periph *periph;
 765         struct ch_softc *softc;
 766         int error;
 767
 768         periph = (struct cam_periph *)dev->si_drv1;
 769         if (periph == NULL)
 770                 return(ENXIO);
 771
 772         cam_periph_lock(periph);
 773         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("entering chioctl\n"));
 774
 775         softc = (struct ch_softc *)periph->softc;
 776
 777         error = 0;
 778
 779         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE,
 780                   ("trying to do ioctl %#lx\n", cmd));
 781
 782         /*
 783          * If this command can change the device's state, we must
 784          * have the device open for writing.
 785          */
 786         switch (cmd) {
 787         case CHIOGPICKER:
 788         case CHIOGPARAMS:
 789         case OCHIOGSTATUS:
 790         case CHIOGSTATUS:
 791                 break;
 792
 793         default:
 794                 if ((flag & FWRITE) == 0) {
 795                         cam_periph_unlock(periph);
 796                         return (EBADF);
 797                 }
 798         }
 799
 800         switch (cmd) {
 801         case CHIOMOVE:
 802                 error = chmove(periph, (struct changer_move *)addr);
 803                 break;
 804
 805         case CHIOEXCHANGE:
 806                 error = chexchange(periph, (struct changer_exchange *)addr);
 807                 break;
 808
 809         case CHIOPOSITION:
 810                 error = chposition(periph, (struct changer_position *)addr);
 811                 break;
 812
 813         case CHIOGPICKER:
 814                 *(int *)addr = softc->sc_picker - softc->sc_firsts[CHET_MT];
 815                 break;
 816
 817         case CHIOSPICKER:
 818         {
 819                 int new_picker = *(int *)addr;
 820
 821                 if (new_picker > (softc->sc_counts[CHET_MT] - 1)) {
 822                         error = EINVAL;
 823                         break;
 824                 }
 825                 softc->sc_picker = softc->sc_firsts[CHET_MT] + new_picker;
 826                 break;
 827         }
 828         case CHIOGPARAMS:
 829         {
 830                 struct changer_params *cp = (struct changer_params *)addr;
 831
 832                 cp->cp_npickers = softc->sc_counts[CHET_MT];
 833                 cp->cp_nslots = softc->sc_counts[CHET_ST];
 834                 cp->cp_nportals = softc->sc_counts[CHET_IE];
 835                 cp->cp_ndrives = softc->sc_counts[CHET_DT];
 836                 break;
 837         }
 838         case CHIOIELEM:
 839                 error = chielem(periph, *(unsigned int *)addr);
 840                 break;
 841
 842         case OCHIOGSTATUS:
 843         {
 844                 error = chgetelemstatus(periph, SCSI_REV_2, cmd,
 845                     (struct changer_element_status_request *)addr);
 846                 break;
 847         }
 848
 849         case CHIOGSTATUS:
 850         {
 851                 int scsi_version;
 852
 853                 scsi_version = chscsiversion(periph);
 854                 if (scsi_version >= SCSI_REV_0) {
 855                         error = chgetelemstatus(periph, scsi_version, cmd,
 856                             (struct changer_element_status_request *)addr);
 857                 }
 858                 else { /* unable to determine the SCSI version */
 859                         cam_periph_unlock(periph);
 860                         return (ENXIO);
 861                 }
 862                 break;
 863         }
 864
 865         case CHIOSETVOLTAG:
 866         {
 867                 error = chsetvoltag(periph,
 868                                     (struct changer_set_voltag_request *) addr);
 869                 break;
 870         }
 871
 872         /* Implement prevent/allow? */
 873
 874         default:
 875                 error = cam_periph_ioctl(periph, cmd, addr, cherror);
 876                 break;
 877         }
 878
 879         cam_periph_unlock(periph);
 880         return (error);
 881 }
 882
 883 static int
 884 chmove(struct cam_periph *periph, struct changer_move *cm)
 885 {
 886         struct ch_softc *softc;
 887         u_int16_t fromelem, toelem;
 888         union ccb *ccb;
 889         int error;
 890
 891         error = 0;
 892         softc = (struct ch_softc *)periph->softc;
 893
 894         /*
 895          * Check arguments.
 896          */
 897         if ((cm->cm_fromtype > CHET_DT) || (cm->cm_totype > CHET_DT))
 898                 return (EINVAL);
 899         if ((cm->cm_fromunit > (softc->sc_counts[cm->cm_fromtype] - 1)) ||
 900             (cm->cm_tounit > (softc->sc_counts[cm->cm_totype] - 1)))
 901                 return (ENODEV);
 902
 903         /*
 904          * Check the request against the changer's capabilities.
 905          */
 906         if ((softc->sc_movemask[cm->cm_fromtype] & (1 << cm->cm_totype)) == 0)
 907                 return (ENODEV);
 908
 909         /*
 910          * Calculate the source and destination elements.
 911          */
 912         fromelem = softc->sc_firsts[cm->cm_fromtype] + cm->cm_fromunit;
 913         toelem = softc->sc_firsts[cm->cm_totype] + cm->cm_tounit;
 914
 915         ccb = cam_periph_getccb(periph, CAM_PRIORITY_NORMAL);
 916
 917         scsi_move_medium(&ccb->csio,
 918                          /* retries */ 1,
 919                          /* cbfcnp */ chdone,
 920                          /* tag_action */ MSG_SIMPLE_Q_TAG,
 921                          /* tea */ softc->sc_picker,
 922                          /* src */ fromelem,
 923                          /* dst */ toelem,
 924                          /* invert */ (cm->cm_flags & CM_INVERT) ? TRUE : FALSE,
 925                          /* sense_len */ SSD_FULL_SIZE,
 926                          /* timeout */ CH_TIMEOUT_MOVE_MEDIUM);
 927
 928         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/CAM_RETRY_SELTO,
 929                                   /*sense_flags*/ SF_RETRY_UA,
 930                                   softc->device_stats);
 931
 932         xpt_release_ccb(ccb);
 933
 934         return(error);
 935 }
 936
 937 static int
 938 chexchange(struct cam_periph *periph, struct changer_exchange *ce)
 939 {
 940         struct ch_softc *softc;
 941         u_int16_t src, dst1, dst2;
 942         union ccb *ccb;
 943         int error;
 944
 945         error = 0;
 946         softc = (struct ch_softc *)periph->softc;
 947         /*
 948          * Check arguments.
 949          */
 950         if ((ce->ce_srctype > CHET_DT) || (ce->ce_fdsttype > CHET_DT) ||
 951             (ce->ce_sdsttype > CHET_DT))
 952                 return (EINVAL);
 953         if ((ce->ce_srcunit > (softc->sc_counts[ce->ce_srctype] - 1)) ||
 954             (ce->ce_fdstunit > (softc->sc_counts[ce->ce_fdsttype] - 1)) ||
 955             (ce->ce_sdstunit > (softc->sc_counts[ce->ce_sdsttype] - 1)))
 956                 return (ENODEV);
 957
 958         /*
 959          * Check the request against the changer's capabilities.
 960          */
 961         if (((softc->sc_exchangemask[ce->ce_srctype] &
 962              (1 << ce->ce_fdsttype)) == 0) ||
 963             ((softc->sc_exchangemask[ce->ce_fdsttype] &
 964              (1 << ce->ce_sdsttype)) == 0))
 965                 return (ENODEV);
 966
 967         /*
 968          * Calculate the source and destination elements.
 969          */
 970         src = softc->sc_firsts[ce->ce_srctype] + ce->ce_srcunit;
 971         dst1 = softc->sc_firsts[ce->ce_fdsttype] + ce->ce_fdstunit;
 972         dst2 = softc->sc_firsts[ce->ce_sdsttype] + ce->ce_sdstunit;
 973
 974         ccb = cam_periph_getccb(periph, CAM_PRIORITY_NORMAL);
 975
 976         scsi_exchange_medium(&ccb->csio,
 977                              /* retries */ 1,
 978                              /* cbfcnp */ chdone,
 979                              /* tag_action */ MSG_SIMPLE_Q_TAG,
 980                              /* tea */ softc->sc_picker,
 981                              /* src */ src,
 982                              /* dst1 */ dst1,
 983                              /* dst2 */ dst2,
 984                              /* invert1 */ (ce->ce_flags & CE_INVERT1) ?
 985                                            TRUE : FALSE,
 986                              /* invert2 */ (ce->ce_flags & CE_INVERT2) ?
 987                                            TRUE : FALSE,
 988                              /* sense_len */ SSD_FULL_SIZE,
 989                              /* timeout */ CH_TIMEOUT_EXCHANGE_MEDIUM);
 990
 991         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/CAM_RETRY_SELTO,
 992                                   /*sense_flags*/ SF_RETRY_UA,
 993                                   softc->device_stats);
 994
 995         xpt_release_ccb(ccb);
 996
 997         return(error);
 998 }
 999
1000 static int
1001 chposition(struct cam_periph *periph, struct changer_position *cp)
1002 {
1003         struct ch_softc *softc;
1004         u_int16_t dst;
1005         union ccb *ccb;
1006         int error;
1007
1008         error = 0;
1009         softc = (struct ch_softc *)periph->softc;
1010
1011         /*
1012          * Check arguments.
1013          */
1014         if (cp->cp_type > CHET_DT)
1015                 return (EINVAL);
1016         if (cp->cp_unit > (softc->sc_counts[cp->cp_type] - 1))
1017                 return (ENODEV);
1018
1019         /*
1020          * Calculate the destination element.
1021          */
1022         dst = softc->sc_firsts[cp->cp_type] + cp->cp_unit;
1023
1024         ccb = cam_periph_getccb(periph, CAM_PRIORITY_NORMAL);
1025
1026         scsi_position_to_element(&ccb->csio,
1027                                  /* retries */ 1,
1028                                  /* cbfcnp */ chdone,
1029                                  /* tag_action */ MSG_SIMPLE_Q_TAG,
1030                                  /* tea */ softc->sc_picker,
1031                                  /* dst */ dst,
1032                                  /* invert */ (cp->cp_flags & CP_INVERT) ?
1033                                               TRUE : FALSE,
1034                                  /* sense_len */ SSD_FULL_SIZE,
1035                                  /* timeout */ CH_TIMEOUT_POSITION_TO_ELEMENT);
1036
1037         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
1038                                   /*sense_flags*/ SF_RETRY_UA,
1039                                   softc->device_stats);
1040
1041         xpt_release_ccb(ccb);
1042
1043         return(error);
1044 }
1045
1046 /*
1047  * Copy a volume tag to a volume_tag struct, converting SCSI byte order
1048  * to host native byte order in the volume serial number.  The volume
1049  * label as returned by the changer is transferred to user mode as
1050  * nul-terminated string.  Volume labels are truncated at the first
1051  * space, as suggested by SCSI-2.
1052  */
1053 static  void
1054 copy_voltag(struct changer_voltag *uvoltag, struct volume_tag *voltag)
1055 {
1056         int i;
1057         for (i=0; i<CH_VOLTAG_MAXLEN; i++) {
1058                 char c = voltag->vif[i];
1059                 if (c && c != ' ')
1060                         uvoltag->cv_volid[i] = c;
1061                 else
1062                         break;
1063         }
1064         uvoltag->cv_serial = scsi_2btoul(voltag->vsn);
1065 }
1066
1067 /*
1068  * Copy an element status descriptor to a user-mode
1069  * changer_element_status structure.
1070  */
1071 static void
1072 copy_element_status(struct ch_softc *softc,
1073                     u_int16_t flags,
1074                     struct read_element_status_descriptor *desc,
1075                     struct changer_element_status *ces,
1076                     int scsi_version)
1077 {
1078         u_int16_t eaddr = scsi_2btoul(desc->eaddr);
1079         u_int16_t et;
1080         struct volume_tag *pvol_tag = NULL, *avol_tag = NULL;
1081         struct read_element_status_device_id *devid = NULL;
1082
1083         ces->ces_int_addr = eaddr;
1084         /* set up logical address in element status */
1085         for (et = CHET_MT; et <= CHET_DT; et++) {
1086                 if ((softc->sc_firsts[et] <= eaddr)
1087                     && ((softc->sc_firsts[et] + softc->sc_counts[et])
1088                         > eaddr)) {
1089                         ces->ces_addr = eaddr - softc->sc_firsts[et];
1090                         ces->ces_type = et;
1091                         break;
1092                 }
1093         }
1094
1095         ces->ces_flags = desc->flags1;
1096
1097         ces->ces_sensecode = desc->sense_code;
1098         ces->ces_sensequal = desc->sense_qual;
1099
1100         if (desc->flags2 & READ_ELEMENT_STATUS_INVERT)
1101                 ces->ces_flags |= CES_INVERT;
1102
1103         if (desc->flags2 & READ_ELEMENT_STATUS_SVALID) {
1104
1105                 eaddr = scsi_2btoul(desc->ssea);
1106
1107                 /* convert source address to logical format */
1108                 for (et = CHET_MT; et <= CHET_DT; et++) {
1109                         if ((softc->sc_firsts[et] <= eaddr)
1110                             && ((softc->sc_firsts[et] + softc->sc_counts[et])
1111                                 > eaddr)) {
1112                                 ces->ces_source_addr =
1113                                         eaddr - softc->sc_firsts[et];
1114                                 ces->ces_source_type = et;
1115                                 ces->ces_flags |= CES_SOURCE_VALID;
1116                                 break;
1117                         }
1118                 }
1119
1120                 if (!(ces->ces_flags & CES_SOURCE_VALID))
1121                         printf("ch: warning: could not map element source "
1122                                "address %ud to a valid element type\n",
1123                                eaddr);
1124         }
1125
1126         /*
1127          * pvoltag and avoltag are common between SCSI-2 and later versions
1128          */
1129         if (flags & READ_ELEMENT_STATUS_PVOLTAG)
1130                 pvol_tag = &desc->voltag_devid.pvoltag;
1131         if (flags & READ_ELEMENT_STATUS_AVOLTAG)
1132                 avol_tag = (flags & READ_ELEMENT_STATUS_PVOLTAG) ?
1133                     &desc->voltag_devid.voltag[1] :&desc->voltag_devid.pvoltag;
1134         /*
1135          * For SCSI-3 and later, element status can carry designator and
1136          * other information.
1137          */
1138         if (scsi_version >= SCSI_REV_SPC) {
1139                 if ((flags & READ_ELEMENT_STATUS_PVOLTAG) ^
1140                     (flags & READ_ELEMENT_STATUS_AVOLTAG))
1141                         devid = &desc->voltag_devid.pvol_and_devid.devid;
1142                 else if (!(flags & READ_ELEMENT_STATUS_PVOLTAG) &&
1143                          !(flags & READ_ELEMENT_STATUS_AVOLTAG))
1144                         devid = &desc->voltag_devid.devid;
1145                 else /* Have both PVOLTAG and AVOLTAG */
1146                         devid = &desc->voltag_devid.vol_tags_and_devid.devid;
1147         }
1148
1149         if (pvol_tag)
1150                 copy_voltag(&(ces->ces_pvoltag), pvol_tag);
1151         if (avol_tag)
1152                 copy_voltag(&(ces->ces_pvoltag), avol_tag);
1153         if (devid != NULL) {
1154                 if (devid->designator_length > 0) {
1155                         bcopy((void *)devid->designator,
1156                               (void *)ces->ces_designator,
1157                               devid->designator_length);
1158                         ces->ces_designator_length = devid->designator_length;
1159                         /*
1160                          * Make sure we are always NUL terminated.  The
1161                          * This won't matter for the binary code set,
1162                          * since the user will only pay attention to the
1163                          * length field.
1164                          */
1165                         ces->ces_designator[devid->designator_length]= '\0';
1166                 }
1167                 if (devid->piv_assoc_designator_type &
1168                     READ_ELEMENT_STATUS_PIV_SET) {
1169                         ces->ces_flags |= CES_PIV;
1170                         ces->ces_protocol_id =
1171                             READ_ELEMENT_STATUS_PROTOCOL_ID(
1172                             devid->prot_code_set);
1173                 }
1174                 ces->ces_code_set =
1175                     READ_ELEMENT_STATUS_CODE_SET(devid->prot_code_set);
1176                 ces->ces_assoc = READ_ELEMENT_STATUS_ASSOCIATION(
1177                     devid->piv_assoc_designator_type);
1178                 ces->ces_designator_type = READ_ELEMENT_STATUS_DESIGNATOR_TYPE(
1179                     devid->piv_assoc_designator_type);
1180         } else if (scsi_version > SCSI_REV_2) {
1181                 /* SCSI-SPC and No devid, no designator */
1182                 ces->ces_designator_length = 0;
1183                 ces->ces_designator[0] = '\0';
1184                 ces->ces_protocol_id = CES_PROTOCOL_ID_FCP_4;
1185         }
1186
1187         if (scsi_version <= SCSI_REV_2) {
1188                 if (desc->dt_or_obsolete.scsi_2.dt_scsi_flags &
1189                     READ_ELEMENT_STATUS_DT_IDVALID) {
1190                         ces->ces_flags |= CES_SCSIID_VALID;
1191                         ces->ces_scsi_id =
1192                             desc->dt_or_obsolete.scsi_2.dt_scsi_addr;
1193                 }
1194
1195                 if (desc->dt_or_obsolete.scsi_2.dt_scsi_addr &
1196                     READ_ELEMENT_STATUS_DT_LUVALID) {
1197                         ces->ces_flags |= CES_LUN_VALID;
1198                         ces->ces_scsi_lun =
1199                             desc->dt_or_obsolete.scsi_2.dt_scsi_flags &
1200                             READ_ELEMENT_STATUS_DT_LUNMASK;
1201                 }
1202         }
1203 }
1204
1205 static int
1206 chgetelemstatus(struct cam_periph *periph, int scsi_version, u_long cmd,
1207                 struct changer_element_status_request *cesr)
1208 {
1209         struct read_element_status_header *st_hdr;
1210         struct read_element_status_page_header *pg_hdr;
1211         struct read_element_status_descriptor *desc;
1212         caddr_t data = NULL;
1213         size_t size, desclen;
1214         int avail, i, error = 0;
1215         int curdata, dvcid, sense_flags;
1216         int try_no_dvcid = 0;
1217         struct changer_element_status *user_data = NULL;
1218         struct ch_softc *softc;
1219         union ccb *ccb;
1220         int chet = cesr->cesr_element_type;
1221         int want_voltags = (cesr->cesr_flags & CESR_VOLTAGS) ? 1 : 0;
1222
1223         softc = (struct ch_softc *)periph->softc;
1224
1225         /* perform argument checking */
1226
1227         /*
1228          * Perform a range check on the cesr_element_{base,count}
1229          * request argument fields.
1230          */
1231         if ((softc->sc_counts[chet] - cesr->cesr_element_base) <= 0
1232             || (cesr->cesr_element_base + cesr->cesr_element_count)
1233                 > softc->sc_counts[chet])
1234                 return (EINVAL);
1235
1236         /*
1237          * Request one descriptor for the given element type.  This
1238          * is used to determine the size of the descriptor so that
1239          * we can allocate enough storage for all of them.  We assume
1240          * that the first one can fit into 1k.
1241          */
1242         cam_periph_unlock(periph);
1243         data = (caddr_t)malloc(1024, M_DEVBUF, M_WAITOK);
1244
1245         cam_periph_lock(periph);
1246         ccb = cam_periph_getccb(periph, CAM_PRIORITY_NORMAL);
1247
1248         sense_flags = SF_RETRY_UA;
1249         if (softc->quirks & CH_Q_NO_DVCID) {
1250                 dvcid = 0;
1251                 curdata = 0;
1252         } else {
1253                 dvcid = 1;
1254                 curdata = 1;
1255                 /*
1256                  * Don't print anything for an Illegal Request, because
1257                  * these flags can cause some changers to complain.  We'll
1258                  * retry without them if we get an error.
1259                  */
1260                 sense_flags |= SF_QUIET_IR;
1261         }
1262
1263 retry_einval:
1264
1265         scsi_read_element_status(&ccb->csio,
1266                                  /* retries */ 1,
1267                                  /* cbfcnp */ chdone,
1268                                  /* tag_action */ MSG_SIMPLE_Q_TAG,
1269                                  /* voltag */ want_voltags,
1270                                  /* sea */ softc->sc_firsts[chet],
1271                                  /* curdata */ curdata,
1272                                  /* dvcid */ dvcid,
1273                                  /* count */ 1,
1274                                  /* data_ptr */ data,
1275                                  /* dxfer_len */ 1024,
1276                                  /* sense_len */ SSD_FULL_SIZE,
1277                                  /* timeout */ CH_TIMEOUT_READ_ELEMENT_STATUS);
1278
1279         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
1280                                   /*sense_flags*/ sense_flags,
1281                                   softc->device_stats);
1282
1283         /*
1284          * An Illegal Request sense key (only used if there is no asc/ascq)
1285          * or 0x24,0x00 for an ASC/ASCQ both map to EINVAL.  If dvcid or
1286          * curdata are set (we set both or neither), try turning them off
1287          * and see if the command is successful.
1288          */
1289         if ((error == EINVAL)
1290          && (dvcid || curdata))  {
1291                 dvcid = 0;
1292                 curdata = 0;
1293                 error = 0;
1294                 /* At this point we want to report any Illegal Request */
1295                 sense_flags &= ~SF_QUIET_IR;
1296                 try_no_dvcid = 1;
1297                 goto retry_einval;
1298         }
1299
1300         /*
1301          * In this case, we tried a read element status with dvcid and
1302          * curdata set, and it failed.  We retried without those bits, and
1303          * it succeeded.  Suggest to the user that he set a quirk, so we
1304          * don't go through the retry process the first time in the future.
1305          * This should only happen on changers that claim SCSI-3 or higher,
1306          * but don't support these bits.
1307          */
1308         if ((try_no_dvcid != 0)
1309          && (error == 0))
1310                 softc->quirks |= CH_Q_NO_DVCID;
1311
1312         if (error)
1313                 goto done;
1314         cam_periph_unlock(periph);
1315
1316         st_hdr = (struct read_element_status_header *)data;
1317         pg_hdr = (struct read_element_status_page_header *)((uintptr_t)st_hdr +
1318                   sizeof(struct read_element_status_header));
1319         desclen = scsi_2btoul(pg_hdr->edl);
1320
1321         size = sizeof(struct read_element_status_header) +
1322                sizeof(struct read_element_status_page_header) +
1323                (desclen * cesr->cesr_element_count);
1324         /*
1325          * Reallocate storage for descriptors and get them from the
1326          * device.
1327          */
1328         free(data, M_DEVBUF);
1329         data = (caddr_t)malloc(size, M_DEVBUF, M_WAITOK);
1330
1331         cam_periph_lock(periph);
1332         scsi_read_element_status(&ccb->csio,
1333                                  /* retries */ 1,
1334                                  /* cbfcnp */ chdone,
1335                                  /* tag_action */ MSG_SIMPLE_Q_TAG,
1336                                  /* voltag */ want_voltags,
1337                                  /* sea */ softc->sc_firsts[chet]
1338                                  + cesr->cesr_element_base,
1339                                  /* curdata */ curdata,
1340                                  /* dvcid */ dvcid,
1341                                  /* count */ cesr->cesr_element_count,
1342                                  /* data_ptr */ data,
1343                                  /* dxfer_len */ size,
1344                                  /* sense_len */ SSD_FULL_SIZE,
1345                                  /* timeout */ CH_TIMEOUT_READ_ELEMENT_STATUS);
1346
1347         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
1348                                   /*sense_flags*/ SF_RETRY_UA,
1349                                   softc->device_stats);
1350
1351         if (error)
1352                 goto done;
1353         cam_periph_unlock(periph);
1354
1355         /*
1356          * Fill in the user status array.
1357          */
1358         st_hdr = (struct read_element_status_header *)data;
1359         pg_hdr = (struct read_element_status_page_header *)((uintptr_t)st_hdr +
1360                   sizeof(struct read_element_status_header));
1361         avail = scsi_2btoul(st_hdr->count);
1362
1363         if (avail != cesr->cesr_element_count) {
1364                 xpt_print(periph->path,
1365                     "warning, READ ELEMENT STATUS avail != count\n");
1366         }
1367
1368         user_data = (struct changer_element_status *)
1369                 malloc(avail * sizeof(struct changer_element_status),
1370                        M_DEVBUF, M_WAITOK | M_ZERO);
1371
1372         desc = (struct read_element_status_descriptor *)((uintptr_t)data +
1373                 sizeof(struct read_element_status_header) +
1374                 sizeof(struct read_element_status_page_header));
1375         /*
1376          * Set up the individual element status structures
1377          */
1378         for (i = 0; i < avail; ++i) {
1379                 struct changer_element_status *ces;
1380
1381                 /*
1382                  * In the changer_element_status structure, fields from
1383                  * the beginning to the field of ces_scsi_lun are common
1384                  * between SCSI-2 and SCSI-3, while all the rest are new
1385                  * from SCSI-3. In order to maintain backward compatibility
1386                  * of the chio command, the ces pointer, below, is computed
1387                  * such that it lines up with the structure boundary
1388                  * corresponding to the SCSI version.
1389                  */
1390                 ces = cmd == OCHIOGSTATUS ?
1391                     (struct changer_element_status *)
1392                     ((unsigned char *)user_data + i *
1393                      (offsetof(struct changer_element_status,ces_scsi_lun)+1)):
1394                     &user_data[i];
1395
1396                 copy_element_status(softc, pg_hdr->flags, desc,
1397                                     ces, scsi_version);
1398
1399                 desc = (struct read_element_status_descriptor *)
1400                        ((unsigned char *)desc + desclen);
1401         }
1402
1403         /* Copy element status structures out to userspace. */
1404         if (cmd == OCHIOGSTATUS)
1405                 error = copyout(user_data,
1406                                 cesr->cesr_element_status,
1407                                 avail* (offsetof(struct changer_element_status,
1408                                 ces_scsi_lun) + 1));
1409         else
1410                 error = copyout(user_data,
1411                                 cesr->cesr_element_status,
1412                                 avail * sizeof(struct changer_element_status));
1413
1414         cam_periph_lock(periph);
1415
1416  done:
1417         xpt_release_ccb(ccb);
1418
1419         if (data != NULL)
1420                 free(data, M_DEVBUF);
1421         if (user_data != NULL)
1422                 free(user_data, M_DEVBUF);
1423
1424         return (error);
1425 }
1426
1427 static int
1428 chielem(struct cam_periph *periph,
1429         unsigned int timeout)
1430 {
1431         union ccb *ccb;
1432         struct ch_softc *softc;
1433         int error;
1434
1435         if (!timeout) {
1436                 timeout = CH_TIMEOUT_INITIALIZE_ELEMENT_STATUS;
1437         } else {
1438                 timeout *= 1000;
1439         }
1440
1441         error = 0;
1442         softc = (struct ch_softc *)periph->softc;
1443
1444         ccb = cam_periph_getccb(periph, CAM_PRIORITY_NORMAL);
1445
1446         scsi_initialize_element_status(&ccb->csio,
1447                                       /* retries */ 1,
1448                                       /* cbfcnp */ chdone,
1449                                       /* tag_action */ MSG_SIMPLE_Q_TAG,
1450                                       /* sense_len */ SSD_FULL_SIZE,
1451                                       /* timeout */ timeout);
1452
1453         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
1454                                   /*sense_flags*/ SF_RETRY_UA,
1455                                   softc->device_stats);
1456
1457         xpt_release_ccb(ccb);
1458
1459         return(error);
1460 }
1461
1462 static int
1463 chsetvoltag(struct cam_periph *periph,
1464             struct changer_set_voltag_request *csvr)
1465 {
1466         union ccb *ccb;
1467         struct ch_softc *softc;
1468         u_int16_t ea;
1469         u_int8_t sac;
1470         struct scsi_send_volume_tag_parameters ssvtp;
1471         int error;
1472         int i;
1473
1474         error = 0;
1475         softc = (struct ch_softc *)periph->softc;
1476
1477         bzero(&ssvtp, sizeof(ssvtp));
1478         for (i=0; i<sizeof(ssvtp.vitf); i++) {
1479                 ssvtp.vitf[i] = ' ';
1480         }
1481
1482         /*
1483          * Check arguments.
1484          */
1485         if (csvr->csvr_type > CHET_DT)
1486                 return EINVAL;
1487         if (csvr->csvr_addr > (softc->sc_counts[csvr->csvr_type] - 1))
1488                 return ENODEV;
1489
1490         ea = softc->sc_firsts[csvr->csvr_type] + csvr->csvr_addr;
1491
1492         if (csvr->csvr_flags & CSVR_ALTERNATE) {
1493                 switch (csvr->csvr_flags & CSVR_MODE_MASK) {
1494                 case CSVR_MODE_SET:
1495                         sac = SEND_VOLUME_TAG_ASSERT_ALTERNATE;
1496                         break;
1497                 case CSVR_MODE_REPLACE:
1498                         sac = SEND_VOLUME_TAG_REPLACE_ALTERNATE;
1499                         break;
1500                 case CSVR_MODE_CLEAR:
1501                         sac = SEND_VOLUME_TAG_UNDEFINED_ALTERNATE;
1502                         break;
1503                 default:
1504                         error = EINVAL;
1505                         goto out;
1506                 }
1507         } else {
1508                 switch (csvr->csvr_flags & CSVR_MODE_MASK) {
1509                 case CSVR_MODE_SET:
1510                         sac = SEND_VOLUME_TAG_ASSERT_PRIMARY;
1511                         break;
1512                 case CSVR_MODE_REPLACE:
1513                         sac = SEND_VOLUME_TAG_REPLACE_PRIMARY;
1514                         break;
1515                 case CSVR_MODE_CLEAR:
1516                         sac = SEND_VOLUME_TAG_UNDEFINED_PRIMARY;
1517                         break;
1518                 default:
1519                         error = EINVAL;
1520                         goto out;
1521                 }
1522         }
1523
1524         memcpy(ssvtp.vitf, csvr->csvr_voltag.cv_volid,
1525                min(strlen(csvr->csvr_voltag.cv_volid), sizeof(ssvtp.vitf)));
1526         scsi_ulto2b(csvr->csvr_voltag.cv_serial, ssvtp.minvsn);
1527
1528         ccb = cam_periph_getccb(periph, CAM_PRIORITY_NORMAL);
1529
1530         scsi_send_volume_tag(&ccb->csio,
1531                              /* retries */ 1,
1532                              /* cbfcnp */ chdone,
1533                              /* tag_action */ MSG_SIMPLE_Q_TAG,
1534                              /* element_address */ ea,
1535                              /* send_action_code */ sac,
1536                              /* parameters */ &ssvtp,
1537                              /* sense_len */ SSD_FULL_SIZE,
1538                              /* timeout */ CH_TIMEOUT_SEND_VOLTAG);
1539
1540         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
1541                                   /*sense_flags*/ SF_RETRY_UA,
1542                                   softc->device_stats);
1543
1544         xpt_release_ccb(ccb);
1545
1546  out:
1547         return error;
1548 }
1549
1550 static int
1551 chgetparams(struct cam_periph *periph)
1552 {
1553         union ccb *ccb;
1554         struct ch_softc *softc;
1555         void *mode_buffer;
1556         int mode_buffer_len;
1557         struct page_element_address_assignment *ea;
1558         struct page_device_capabilities *cap;
1559         int error, from, dbd;
1560         u_int8_t *moves, *exchanges;
1561
1562         error = 0;
1563
1564         softc = (struct ch_softc *)periph->softc;
1565
1566         ccb = cam_periph_getccb(periph, CAM_PRIORITY_NORMAL);
1567
1568         /*
1569          * The scsi_mode_sense_data structure is just a convenience
1570          * structure that allows us to easily calculate the worst-case
1571          * storage size of the mode sense buffer.
1572          */
1573         mode_buffer_len = sizeof(struct scsi_mode_sense_data);
1574
1575         mode_buffer = malloc(mode_buffer_len, M_SCSICH, M_NOWAIT);
1576
1577         if (mode_buffer == NULL) {
1578                 printf("chgetparams: couldn't malloc mode sense data\n");
1579                 return(ENOSPC);
1580         }
1581
1582         bzero(mode_buffer, mode_buffer_len);
1583
1584         if (softc->quirks & CH_Q_NO_DBD)
1585                 dbd = FALSE;
1586         else
1587                 dbd = TRUE;
1588
1589         /*
1590          * Get the element address assignment page.
1591          */
1592         scsi_mode_sense(&ccb->csio,
1593                         /* retries */ 1,
1594                         /* cbfcnp */ chdone,
1595                         /* tag_action */ MSG_SIMPLE_Q_TAG,
1596                         /* dbd */ dbd,
1597                         /* page_code */ SMS_PAGE_CTRL_CURRENT,
1598                         /* page */ CH_ELEMENT_ADDR_ASSIGN_PAGE,
1599                         /* param_buf */ (u_int8_t *)mode_buffer,
1600                         /* param_len */ mode_buffer_len,
1601                         /* sense_len */ SSD_FULL_SIZE,
1602                         /* timeout */ CH_TIMEOUT_MODE_SENSE);
1603
1604         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
1605                                   /* sense_flags */ SF_RETRY_UA|SF_NO_PRINT,
1606                                   softc->device_stats);
1607
1608         if (error) {
1609                 if (dbd) {
1610                         struct scsi_mode_sense_6 *sms;
1611
1612                         sms = (struct scsi_mode_sense_6 *)
1613                                 ccb->csio.cdb_io.cdb_bytes;
1614
1615                         sms->byte2 &= ~SMS_DBD;
1616                         error = cam_periph_runccb(ccb, cherror,
1617                                                   /*cam_flags*/ CAM_RETRY_SELTO,
1618                                                   /*sense_flags*/ SF_RETRY_UA,
1619                                                   softc->device_stats);
1620                 } else {
1621                         /*
1622                          * Since we disabled sense printing above, print
1623                          * out the sense here since we got an error.
1624                          */
1625                         scsi_sense_print(&ccb->csio);
1626                 }
1627
1628                 if (error) {
1629                         xpt_print(periph->path,
1630                             "chgetparams: error getting element "
1631                             "address page\n");
1632                         xpt_release_ccb(ccb);
1633                         free(mode_buffer, M_SCSICH);
1634                         return(error);
1635                 }
1636         }
1637
1638         ea = (struct page_element_address_assignment *)
1639                 find_mode_page_6((struct scsi_mode_header_6 *)mode_buffer);
1640
1641         softc->sc_firsts[CHET_MT] = scsi_2btoul(ea->mtea);
1642         softc->sc_counts[CHET_MT] = scsi_2btoul(ea->nmte);
1643         softc->sc_firsts[CHET_ST] = scsi_2btoul(ea->fsea);
1644         softc->sc_counts[CHET_ST] = scsi_2btoul(ea->nse);
1645         softc->sc_firsts[CHET_IE] = scsi_2btoul(ea->fieea);
1646         softc->sc_counts[CHET_IE] = scsi_2btoul(ea->niee);
1647         softc->sc_firsts[CHET_DT] = scsi_2btoul(ea->fdtea);
1648         softc->sc_counts[CHET_DT] = scsi_2btoul(ea->ndte);
1649
1650         bzero(mode_buffer, mode_buffer_len);
1651
1652         /*
1653          * Now get the device capabilities page.
1654          */
1655         scsi_mode_sense(&ccb->csio,
1656                         /* retries */ 1,
1657                         /* cbfcnp */ chdone,
1658                         /* tag_action */ MSG_SIMPLE_Q_TAG,
1659                         /* dbd */ dbd,
1660                         /* page_code */ SMS_PAGE_CTRL_CURRENT,
1661                         /* page */ CH_DEVICE_CAP_PAGE,
1662                         /* param_buf */ (u_int8_t *)mode_buffer,
1663                         /* param_len */ mode_buffer_len,
1664                         /* sense_len */ SSD_FULL_SIZE,
1665                         /* timeout */ CH_TIMEOUT_MODE_SENSE);
1666
1667         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
1668                                   /* sense_flags */ SF_RETRY_UA | SF_NO_PRINT,
1669                                   softc->device_stats);
1670
1671         if (error) {
1672                 if (dbd) {
1673                         struct scsi_mode_sense_6 *sms;
1674
1675                         sms = (struct scsi_mode_sense_6 *)
1676                                 ccb->csio.cdb_io.cdb_bytes;
1677
1678                         sms->byte2 &= ~SMS_DBD;
1679                         error = cam_periph_runccb(ccb, cherror,
1680                                                   /*cam_flags*/ CAM_RETRY_SELTO,
1681                                                   /*sense_flags*/ SF_RETRY_UA,
1682                                                   softc->device_stats);
1683                 } else {
1684                         /*
1685                          * Since we disabled sense printing above, print
1686                          * out the sense here since we got an error.
1687                          */
1688                         scsi_sense_print(&ccb->csio);
1689                 }
1690
1691                 if (error) {
1692                         xpt_print(periph->path,
1693                             "chgetparams: error getting device "
1694                             "capabilities page\n");
1695                         xpt_release_ccb(ccb);
1696                         free(mode_buffer, M_SCSICH);
1697                         return(error);
1698                 }
1699         }
1700
1701         xpt_release_ccb(ccb);
1702
1703         cap = (struct page_device_capabilities *)
1704                 find_mode_page_6((struct scsi_mode_header_6 *)mode_buffer);
1705
1706         bzero(softc->sc_movemask, sizeof(softc->sc_movemask));
1707         bzero(softc->sc_exchangemask, sizeof(softc->sc_exchangemask));
1708         moves = cap->move_from;
1709         exchanges = cap->exchange_with;
1710         for (from = CHET_MT; from <= CHET_MAX; ++from) {
1711                 softc->sc_movemask[from] = moves[from];
1712                 softc->sc_exchangemask[from] = exchanges[from];
1713         }
1714
1715         free(mode_buffer, M_SCSICH);
1716
1717         return(error);
1718 }
1719
1720 static int
1721 chscsiversion(struct cam_periph *periph)
1722 {
1723         struct scsi_inquiry_data *inq_data;
1724         struct ccb_getdev *cgd;
1725         int dev_scsi_version;
1726         struct cam_sim *sim;
1727
1728         sim = xpt_path_sim(periph->path);
1729         mtx_assert(sim->mtx, MA_OWNED);
1730         if ((cgd = (struct ccb_getdev *)xpt_alloc_ccb_nowait()) == NULL)
1731                 return (-1);
1732         /*
1733          * Get the device information.
1734          */
1735         xpt_setup_ccb(&cgd->ccb_h,
1736                       periph->path,
1737                       CAM_PRIORITY_NORMAL);
1738         cgd->ccb_h.func_code = XPT_GDEV_TYPE;
1739         xpt_action((union ccb *)cgd);
1740
1741         if (cgd->ccb_h.status != CAM_REQ_CMP) {
1742                 xpt_free_ccb((union ccb *)cgd);
1743                 return -1;
1744         }
1745
1746         inq_data = &cgd->inq_data;
1747         dev_scsi_version = inq_data->version;
1748         xpt_free_ccb((union ccb *)cgd);
1749
1750         return dev_scsi_version;
1751 }
1752
1753 void
1754 scsi_move_medium(struct ccb_scsiio *csio, u_int32_t retries,
1755                  void (*cbfcnp)(struct cam_periph *, union ccb *),
1756                  u_int8_t tag_action, u_int32_t tea, u_int32_t src,
1757                  u_int32_t dst, int invert, u_int8_t sense_len,
1758                  u_int32_t timeout)
1759 {
1760         struct scsi_move_medium *scsi_cmd;
1761
1762         scsi_cmd = (struct scsi_move_medium *)&csio->cdb_io.cdb_bytes;
1763         bzero(scsi_cmd, sizeof(*scsi_cmd));
1764
1765         scsi_cmd->opcode = MOVE_MEDIUM;
1766
1767         scsi_ulto2b(tea, scsi_cmd->tea);
1768         scsi_ulto2b(src, scsi_cmd->src);
1769         scsi_ulto2b(dst, scsi_cmd->dst);
1770
1771         if (invert)
1772                 scsi_cmd->invert |= MOVE_MEDIUM_INVERT;
1773
1774         cam_fill_csio(csio,
1775                       retries,
1776                       cbfcnp,
1777                       /*flags*/ CAM_DIR_NONE,
1778                       tag_action,
1779                       /*data_ptr*/ NULL,
1780                       /*dxfer_len*/ 0,
1781                       sense_len,
1782                       sizeof(*scsi_cmd),
1783                       timeout);
1784 }
1785
1786 void
1787 scsi_exchange_medium(struct ccb_scsiio *csio, u_int32_t retries,
1788                      void (*cbfcnp)(struct cam_periph *, union ccb *),
1789                      u_int8_t tag_action, u_int32_t tea, u_int32_t src,
1790                      u_int32_t dst1, u_int32_t dst2, int invert1,
1791                      int invert2, u_int8_t sense_len, u_int32_t timeout)
1792 {
1793         struct scsi_exchange_medium *scsi_cmd;
1794
1795         scsi_cmd = (struct scsi_exchange_medium *)&csio->cdb_io.cdb_bytes;
1796         bzero(scsi_cmd, sizeof(*scsi_cmd));
1797
1798         scsi_cmd->opcode = EXCHANGE_MEDIUM;
1799
1800         scsi_ulto2b(tea, scsi_cmd->tea);
1801         scsi_ulto2b(src, scsi_cmd->src);
1802         scsi_ulto2b(dst1, scsi_cmd->fdst);
1803         scsi_ulto2b(dst2, scsi_cmd->sdst);
1804
1805         if (invert1)
1806                 scsi_cmd->invert |= EXCHANGE_MEDIUM_INV1;
1807
1808         if (invert2)
1809                 scsi_cmd->invert |= EXCHANGE_MEDIUM_INV2;
1810
1811         cam_fill_csio(csio,
1812                       retries,
1813                       cbfcnp,
1814                       /*flags*/ CAM_DIR_NONE,
1815                       tag_action,
1816                       /*data_ptr*/ NULL,
1817                       /*dxfer_len*/ 0,
1818                       sense_len,
1819                       sizeof(*scsi_cmd),
1820                       timeout);
1821 }
1822
1823 void
1824 scsi_position_to_element(struct ccb_scsiio *csio, u_int32_t retries,
1825                          void (*cbfcnp)(struct cam_periph *, union ccb *),
1826                          u_int8_t tag_action, u_int32_t tea, u_int32_t dst,
1827                          int invert, u_int8_t sense_len, u_int32_t timeout)
1828 {
1829         struct scsi_position_to_element *scsi_cmd;
1830
1831         scsi_cmd = (struct scsi_position_to_element *)&csio->cdb_io.cdb_bytes;
1832         bzero(scsi_cmd, sizeof(*scsi_cmd));
1833
1834         scsi_cmd->opcode = POSITION_TO_ELEMENT;
1835
1836         scsi_ulto2b(tea, scsi_cmd->tea);
1837         scsi_ulto2b(dst, scsi_cmd->dst);
1838
1839         if (invert)
1840                 scsi_cmd->invert |= POSITION_TO_ELEMENT_INVERT;
1841
1842         cam_fill_csio(csio,
1843                       retries,
1844                       cbfcnp,
1845                       /*flags*/ CAM_DIR_NONE,
1846                       tag_action,
1847                       /*data_ptr*/ NULL,
1848                       /*dxfer_len*/ 0,
1849                       sense_len,
1850                       sizeof(*scsi_cmd),
1851                       timeout);
1852 }
1853
1854 void
1855 scsi_read_element_status(struct ccb_scsiio *csio, u_int32_t retries,
1856                          void (*cbfcnp)(struct cam_periph *, union ccb *),
1857                          u_int8_t tag_action, int voltag, u_int32_t sea,
1858                          int curdata, int dvcid,
1859                          u_int32_t count, u_int8_t *data_ptr,
1860                          u_int32_t dxfer_len, u_int8_t sense_len,
1861                          u_int32_t timeout)
1862 {
1863         struct scsi_read_element_status *scsi_cmd;
1864
1865         scsi_cmd = (struct scsi_read_element_status *)&csio->cdb_io.cdb_bytes;
1866         bzero(scsi_cmd, sizeof(*scsi_cmd));
1867
1868         scsi_cmd->opcode = READ_ELEMENT_STATUS;
1869
1870         scsi_ulto2b(sea, scsi_cmd->sea);
1871         scsi_ulto2b(count, scsi_cmd->count);
1872         scsi_ulto3b(dxfer_len, scsi_cmd->len);
1873         if (dvcid)
1874                 scsi_cmd->flags |= READ_ELEMENT_STATUS_DVCID;
1875         if (curdata)
1876                 scsi_cmd->flags |= READ_ELEMENT_STATUS_CURDATA;
1877
1878         if (voltag)
1879                 scsi_cmd->byte2 |= READ_ELEMENT_STATUS_VOLTAG;
1880
1881         cam_fill_csio(csio,
1882                       retries,
1883                       cbfcnp,
1884                       /*flags*/ CAM_DIR_IN,
1885                       tag_action,
1886                       data_ptr,
1887                       dxfer_len,
1888                       sense_len,
1889                       sizeof(*scsi_cmd),
1890                       timeout);
1891 }
1892
1893 void
1894 scsi_initialize_element_status(struct ccb_scsiio *csio, u_int32_t retries,
1895                                void (*cbfcnp)(struct cam_periph *, union ccb *),
1896                                u_int8_t tag_action, u_int8_t sense_len,
1897                                u_int32_t timeout)
1898 {
1899         struct scsi_initialize_element_status *scsi_cmd;
1900
1901         scsi_cmd = (struct scsi_initialize_element_status *)
1902                     &csio->cdb_io.cdb_bytes;
1903         bzero(scsi_cmd, sizeof(*scsi_cmd));
1904
1905         scsi_cmd->opcode = INITIALIZE_ELEMENT_STATUS;
1906
1907         cam_fill_csio(csio,
1908                       retries,
1909                       cbfcnp,
1910                       /*flags*/ CAM_DIR_NONE,
1911                       tag_action,
1912                       /* data_ptr */ NULL,
1913                       /* dxfer_len */ 0,
1914                       sense_len,
1915                       sizeof(*scsi_cmd),
1916                       timeout);
1917 }
1918
1919 void
1920 scsi_send_volume_tag(struct ccb_scsiio *csio, u_int32_t retries,
1921                      void (*cbfcnp)(struct cam_periph *, union ccb *),
1922                      u_int8_t tag_action,
1923                      u_int16_t element_address,
1924                      u_int8_t send_action_code,
1925                      struct scsi_send_volume_tag_parameters *parameters,
1926                      u_int8_t sense_len, u_int32_t timeout)
1927 {
1928         struct scsi_send_volume_tag *scsi_cmd;
1929
1930         scsi_cmd = (struct scsi_send_volume_tag *) &csio->cdb_io.cdb_bytes;
1931         bzero(scsi_cmd, sizeof(*scsi_cmd));
1932
1933         scsi_cmd->opcode = SEND_VOLUME_TAG;
1934         scsi_ulto2b(element_address, scsi_cmd->ea);
1935         scsi_cmd->sac = send_action_code;
1936         scsi_ulto2b(sizeof(*parameters), scsi_cmd->pll);
1937
1938         cam_fill_csio(csio,
1939                       retries,
1940                       cbfcnp,
1941                       /*flags*/ CAM_DIR_OUT,
1942                       tag_action,
1943                       /* data_ptr */ (u_int8_t *) parameters,
1944                       sizeof(*parameters),
1945                       sense_len,
1946                       sizeof(*scsi_cmd),
1947                       timeout);
1948 }