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_types;
 121
 122 typedef enum {
 123         CH_Q_NONE       = 0x00,
 124         CH_Q_NO_DBD     = 0x01,
 125         CH_Q_NO_DVCID   = 0x02
 126 } ch_quirks;
 127
 128 #define CH_Q_BIT_STRING \
 129         "\020"          \
 130         "\001NO_DBD"    \
 131         "\002NO_DVCID"
 132
 133 #define ccb_state       ppriv_field0
 134 #define ccb_bp          ppriv_ptr1
 135
 136 struct scsi_mode_sense_data {
 137         struct scsi_mode_header_6 header;
 138         struct scsi_mode_blk_desc blk_desc;
 139         union {
 140                 struct page_element_address_assignment ea;
 141                 struct page_transport_geometry_parameters tg;
 142                 struct page_device_capabilities cap;
 143         } pages;
 144 };
 145
 146 struct ch_softc {
 147         ch_flags        flags;
 148         ch_state        state;
 149         ch_quirks       quirks;
 150         union ccb       saved_ccb;
 151         struct devstat  *device_stats;
 152         struct cdev     *dev;
 153         int             open_count;
 154
 155         int             sc_picker;      /* current picker */
 156
 157         /*
 158          * The following information is obtained from the
 159          * element address assignment page.
 160          */
 161         int             sc_firsts[CHET_MAX + 1];        /* firsts */
 162         int             sc_counts[CHET_MAX + 1];        /* counts */
 163
 164         /*
 165          * The following mask defines the legal combinations
 166          * of elements for the MOVE MEDIUM command.
 167          */
 168         u_int8_t        sc_movemask[CHET_MAX + 1];
 169
 170         /*
 171          * As above, but for EXCHANGE MEDIUM.
 172          */
 173         u_int8_t        sc_exchangemask[CHET_MAX + 1];
 174
 175         /*
 176          * Quirks; see below.  XXX KDM not implemented yet
 177          */
 178         int             sc_settledelay; /* delay for settle */
 179 };
 180
 181 static  d_open_t        chopen;
 182 static  d_close_t       chclose;
 183 static  d_ioctl_t       chioctl;
 184 static  periph_init_t   chinit;
 185 static  periph_ctor_t   chregister;
 186 static  periph_oninv_t  choninvalidate;
 187 static  periph_dtor_t   chcleanup;
 188 static  periph_start_t  chstart;
 189 static  void            chasync(void *callback_arg, u_int32_t code,
 190                                 struct cam_path *path, void *arg);
 191 static  void            chdone(struct cam_periph *periph,
 192                                union ccb *done_ccb);
 193 static  int             cherror(union ccb *ccb, u_int32_t cam_flags,
 194                                 u_int32_t sense_flags);
 195 static  int             chmove(struct cam_periph *periph,
 196                                struct changer_move *cm);
 197 static  int             chexchange(struct cam_periph *periph,
 198                                    struct changer_exchange *ce);
 199 static  int             chposition(struct cam_periph *periph,
 200                                    struct changer_position *cp);
 201 static  int             chgetelemstatus(struct cam_periph *periph,
 202                                 int scsi_version, u_long cmd,
 203                                 struct changer_element_status_request *csr);
 204 static  int             chsetvoltag(struct cam_periph *periph,
 205                                     struct changer_set_voltag_request *csvr);
 206 static  int             chielem(struct cam_periph *periph,
 207                                 unsigned int timeout);
 208 static  int             chgetparams(struct cam_periph *periph);
 209 static  int             chscsiversion(struct cam_periph *periph);
 210
 211 static struct periph_driver chdriver =
 212 {
 213         chinit, "ch",
 214         TAILQ_HEAD_INITIALIZER(chdriver.units), /* generation */ 0
 215 };
 216
 217 PERIPHDRIVER_DECLARE(ch, chdriver);
 218
 219 static struct cdevsw ch_cdevsw = {
 220         .d_version =    D_VERSION,
 221         .d_flags =      D_TRACKCLOSE,
 222         .d_open =       chopen,
 223         .d_close =      chclose,
 224         .d_ioctl =      chioctl,
 225         .d_name =       "ch",
 226 };
 227
 228 static MALLOC_DEFINE(M_SCSICH, "scsi_ch", "scsi_ch buffers");
 229
 230 static void
 231 chinit(void)
 232 {
 233         cam_status status;
 234
 235         /*
 236          * Install a global async callback.  This callback will
 237          * receive async callbacks like "new device found".
 238          */
 239         status = xpt_register_async(AC_FOUND_DEVICE, chasync, NULL, NULL);
 240
 241         if (status != CAM_REQ_CMP) {
 242                 printf("ch: Failed to attach master async callback "
 243                        "due to status 0x%x!\n", status);
 244         }
 245 }
 246
 247 static void
 248 chdevgonecb(void *arg)
 249 {
 250         struct ch_softc   *softc;
 251         struct cam_periph *periph;
 252         struct mtx *mtx;
 253         int i;
 254
 255         periph = (struct cam_periph *)arg;
 256         mtx = cam_periph_mtx(periph);
 257         mtx_lock(mtx);
 258
 259         softc = (struct ch_softc *)periph->softc;
 260         KASSERT(softc->open_count >= 0, ("Negative open count %d",
 261                 softc->open_count));
 262
 263         /*
 264          * When we get this callback, we will get no more close calls from
 265          * devfs.  So if we have any dangling opens, we need to release the
 266          * reference held for that particular context.
 267          */
 268         for (i = 0; i < softc->open_count; i++)
 269                 cam_periph_release_locked(periph);
 270
 271         softc->open_count = 0;
 272
 273         /*
 274          * Release the reference held for the device node, it is gone now.
 275          */
 276         cam_periph_release_locked(periph);
 277
 278         /*
 279          * We reference the lock directly here, instead of using
 280          * cam_periph_unlock().  The reason is that the final call to
 281          * cam_periph_release_locked() above could result in the periph
 282          * getting freed.  If that is the case, dereferencing the periph
 283          * with a cam_periph_unlock() call would cause a page fault.
 284          */
 285         mtx_unlock(mtx);
 286 }
 287
 288 static void
 289 choninvalidate(struct cam_periph *periph)
 290 {
 291         struct ch_softc *softc;
 292
 293         softc = (struct ch_softc *)periph->softc;
 294
 295         /*
 296          * De-register any async callbacks.
 297          */
 298         xpt_register_async(0, chasync, periph, periph->path);
 299
 300         softc->flags |= CH_FLAG_INVALID;
 301
 302         /*
 303          * Tell devfs this device has gone away, and ask for a callback
 304          * when it has cleaned up its state.
 305          */
 306         destroy_dev_sched_cb(softc->dev, chdevgonecb, periph);
 307 }
 308
 309 static void
 310 chcleanup(struct cam_periph *periph)
 311 {
 312         struct ch_softc *softc;
 313
 314         softc = (struct ch_softc *)periph->softc;
 315
 316         devstat_remove_entry(softc->device_stats);
 317
 318         free(softc, M_DEVBUF);
 319 }
 320
 321 static void
 322 chasync(void *callback_arg, u_int32_t code, struct cam_path *path, void *arg)
 323 {
 324         struct cam_periph *periph;
 325
 326         periph = (struct cam_periph *)callback_arg;
 327
 328         switch(code) {
 329         case AC_FOUND_DEVICE:
 330         {
 331                 struct ccb_getdev *cgd;
 332                 cam_status status;
 333
 334                 cgd = (struct ccb_getdev *)arg;
 335                 if (cgd == NULL)
 336                         break;
 337
 338                 if (cgd->protocol != PROTO_SCSI)
 339                         break;
 340                 if (SID_QUAL(&cgd->inq_data) != SID_QUAL_LU_CONNECTED)
 341                         break;
 342                 if (SID_TYPE(&cgd->inq_data)!= T_CHANGER)
 343                         break;
 344
 345                 /*
 346                  * Allocate a peripheral instance for
 347                  * this device and start the probe
 348                  * process.
 349                  */
 350                 status = cam_periph_alloc(chregister, choninvalidate,
 351                                           chcleanup, chstart, "ch",
 352                                           CAM_PERIPH_BIO, path,
 353                                           chasync, AC_FOUND_DEVICE, cgd);
 354
 355                 if (status != CAM_REQ_CMP
 356                  && status != CAM_REQ_INPROG)
 357                         printf("chasync: Unable to probe new device "
 358                                "due to status 0x%x\n", status);
 359
 360                 break;
 361
 362         }
 363         default:
 364                 cam_periph_async(periph, code, path, arg);
 365                 break;
 366         }
 367 }
 368
 369 static cam_status
 370 chregister(struct cam_periph *periph, void *arg)
 371 {
 372         struct ch_softc *softc;
 373         struct ccb_getdev *cgd;
 374         struct ccb_pathinq cpi;
 375         struct make_dev_args args;
 376         int error;
 377
 378         cgd = (struct ccb_getdev *)arg;
 379         if (cgd == NULL) {
 380                 printf("chregister: no getdev CCB, can't register device\n");
 381                 return(CAM_REQ_CMP_ERR);
 382         }
 383
 384         softc = (struct ch_softc *)malloc(sizeof(*softc),M_DEVBUF,M_NOWAIT);
 385
 386         if (softc == NULL) {
 387                 printf("chregister: Unable to probe new device. "
 388                        "Unable to allocate softc\n");
 389                 return(CAM_REQ_CMP_ERR);
 390         }
 391
 392         bzero(softc, sizeof(*softc));
 393         softc->state = CH_STATE_PROBE;
 394         periph->softc = softc;
 395         softc->quirks = CH_Q_NONE;
 396
 397         /*
 398          * The DVCID and CURDATA bits were not introduced until the SMC
 399          * spec.  If this device claims SCSI-2 or earlier support, then it
 400          * very likely does not support these bits.
 401          */
 402         if (cgd->inq_data.version <= SCSI_REV_2)
 403                 softc->quirks |= CH_Q_NO_DVCID;
 404
 405         bzero(&cpi, sizeof(cpi));
 406         xpt_setup_ccb(&cpi.ccb_h, periph->path, CAM_PRIORITY_NORMAL);
 407         cpi.ccb_h.func_code = XPT_PATH_INQ;
 408         xpt_action((union ccb *)&cpi);
 409
 410         /*
 411          * Changers don't have a blocksize, and obviously don't support
 412          * tagged queueing.
 413          */
 414         cam_periph_unlock(periph);
 415         softc->device_stats = devstat_new_entry("ch",
 416                           periph->unit_number, 0,
 417                           DEVSTAT_NO_BLOCKSIZE | DEVSTAT_NO_ORDERED_TAGS,
 418                           SID_TYPE(&cgd->inq_data) |
 419                           XPORT_DEVSTAT_TYPE(cpi.transport),
 420                           DEVSTAT_PRIORITY_OTHER);
 421
 422         /*
 423          * Acquire a reference to the periph before we create the devfs
 424          * instance for it.  We'll release this reference once the devfs
 425          * instance has been freed.
 426          */
 427         if (cam_periph_acquire(periph) != CAM_REQ_CMP) {
 428                 xpt_print(periph->path, "%s: lost periph during "
 429                           "registration!\n", __func__);
 430                 cam_periph_lock(periph);
 431                 return (CAM_REQ_CMP_ERR);
 432         }
 433
 434
 435         /* Register the device */
 436         make_dev_args_init(&args);
 437         args.mda_devsw = &ch_cdevsw;
 438         args.mda_unit = periph->unit_number;
 439         args.mda_uid = UID_ROOT;
 440         args.mda_gid = GID_OPERATOR;
 441         args.mda_mode = 0600;
 442         args.mda_si_drv1 = periph;
 443         error = make_dev_s(&args, &softc->dev, "%s%d", periph->periph_name,
 444             periph->unit_number);
 445         cam_periph_lock(periph);
 446         if (error != 0) {
 447                 cam_periph_release_locked(periph);
 448                 return (CAM_REQ_CMP_ERR);
 449         }
 450
 451         /*
 452          * Add an async callback so that we get
 453          * notified if this device goes away.
 454          */
 455         xpt_register_async(AC_LOST_DEVICE, chasync, periph, periph->path);
 456
 457         /*
 458          * Lock this periph until we are setup.
 459          * This first call can't block
 460          */
 461         (void)cam_periph_hold(periph, PRIBIO);
 462         xpt_schedule(periph, CAM_PRIORITY_DEV);
 463
 464         return(CAM_REQ_CMP);
 465 }
 466
 467 static int
 468 chopen(struct cdev *dev, int flags, int fmt, struct thread *td)
 469 {
 470         struct cam_periph *periph;
 471         struct ch_softc *softc;
 472         int error;
 473
 474         periph = (struct cam_periph *)dev->si_drv1;
 475         if (cam_periph_acquire(periph) != CAM_REQ_CMP)
 476                 return (ENXIO);
 477
 478         softc = (struct ch_softc *)periph->softc;
 479
 480         cam_periph_lock(periph);
 481
 482         if (softc->flags & CH_FLAG_INVALID) {
 483                 cam_periph_release_locked(periph);
 484                 cam_periph_unlock(periph);
 485                 return(ENXIO);
 486         }
 487
 488         if ((error = cam_periph_hold(periph, PRIBIO | PCATCH)) != 0) {
 489                 cam_periph_unlock(periph);
 490                 cam_periph_release(periph);
 491                 return (error);
 492         }
 493
 494         /*
 495          * Load information about this changer device into the softc.
 496          */
 497         if ((error = chgetparams(periph)) != 0) {
 498                 cam_periph_unhold(periph);
 499                 cam_periph_release_locked(periph);
 500                 cam_periph_unlock(periph);
 501                 return(error);
 502         }
 503
 504         cam_periph_unhold(periph);
 505
 506         softc->open_count++;
 507
 508         cam_periph_unlock(periph);
 509
 510         return(error);
 511 }
 512
 513 static int
 514 chclose(struct cdev *dev, int flag, int fmt, struct thread *td)
 515 {
 516         struct  cam_periph *periph;
 517         struct  ch_softc *softc;
 518         struct mtx *mtx;
 519
 520         periph = (struct cam_periph *)dev->si_drv1;
 521         mtx = cam_periph_mtx(periph);
 522         mtx_lock(mtx);
 523
 524         softc = (struct ch_softc *)periph->softc;
 525         softc->open_count--;
 526
 527         cam_periph_release_locked(periph);
 528
 529         /*
 530          * We reference the lock directly here, instead of using
 531          * cam_periph_unlock().  The reason is that the call to
 532          * cam_periph_release_locked() above could result in the periph
 533          * getting freed.  If that is the case, dereferencing the periph
 534          * with a cam_periph_unlock() call would cause a page fault.
 535          *
 536          * cam_periph_release() avoids this problem using the same method,
 537          * but we're manually acquiring and dropping the lock here to
 538          * protect the open count and avoid another lock acquisition and
 539          * release.
 540          */
 541         mtx_unlock(mtx);
 542
 543         return(0);
 544 }
 545
 546 static void
 547 chstart(struct cam_periph *periph, union ccb *start_ccb)
 548 {
 549         struct ch_softc *softc;
 550
 551         softc = (struct ch_softc *)periph->softc;
 552
 553         switch (softc->state) {
 554         case CH_STATE_NORMAL:
 555         {
 556                 xpt_release_ccb(start_ccb);
 557                 break;
 558         }
 559         case CH_STATE_PROBE:
 560         {
 561                 int mode_buffer_len;
 562                 void *mode_buffer;
 563
 564                 /*
 565                  * Include the block descriptor when calculating the mode
 566                  * buffer length,
 567                  */
 568                 mode_buffer_len = sizeof(struct scsi_mode_header_6) +
 569                                   sizeof(struct scsi_mode_blk_desc) +
 570                                  sizeof(struct page_element_address_assignment);
 571
 572                 mode_buffer = malloc(mode_buffer_len, M_SCSICH, M_NOWAIT);
 573
 574                 if (mode_buffer == NULL) {
 575                         printf("chstart: couldn't malloc mode sense data\n");
 576                         break;
 577                 }
 578                 bzero(mode_buffer, mode_buffer_len);
 579
 580                 /*
 581                  * Get the element address assignment page.
 582                  */
 583                 scsi_mode_sense(&start_ccb->csio,
 584                                 /* retries */ 1,
 585                                 /* cbfcnp */ chdone,
 586                                 /* tag_action */ MSG_SIMPLE_Q_TAG,
 587                                 /* dbd */ (softc->quirks & CH_Q_NO_DBD) ?
 588                                         FALSE : TRUE,
 589                                 /* pc */ SMS_PAGE_CTRL_CURRENT,
 590                                 /* page */ CH_ELEMENT_ADDR_ASSIGN_PAGE,
 591                                 /* param_buf */ (u_int8_t *)mode_buffer,
 592                                 /* param_len */ mode_buffer_len,
 593                                 /* sense_len */ SSD_FULL_SIZE,
 594                                 /* timeout */ CH_TIMEOUT_MODE_SENSE);
 595
 596                 start_ccb->ccb_h.ccb_bp = NULL;
 597                 start_ccb->ccb_h.ccb_state = CH_CCB_PROBE;
 598                 xpt_action(start_ccb);
 599                 break;
 600         }
 601         }
 602 }
 603
 604 static void
 605 chdone(struct cam_periph *periph, union ccb *done_ccb)
 606 {
 607         struct ch_softc *softc;
 608         struct ccb_scsiio *csio;
 609
 610         softc = (struct ch_softc *)periph->softc;
 611         csio = &done_ccb->csio;
 612
 613         switch(done_ccb->ccb_h.ccb_state) {
 614         case CH_CCB_PROBE:
 615         {
 616                 struct scsi_mode_header_6 *mode_header;
 617                 struct page_element_address_assignment *ea;
 618                 char announce_buf[80];
 619
 620
 621                 mode_header = (struct scsi_mode_header_6 *)csio->data_ptr;
 622
 623                 ea = (struct page_element_address_assignment *)
 624                         find_mode_page_6(mode_header);
 625
 626                 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP){
 627
 628                         softc->sc_firsts[CHET_MT] = scsi_2btoul(ea->mtea);
 629                         softc->sc_counts[CHET_MT] = scsi_2btoul(ea->nmte);
 630                         softc->sc_firsts[CHET_ST] = scsi_2btoul(ea->fsea);
 631                         softc->sc_counts[CHET_ST] = scsi_2btoul(ea->nse);
 632                         softc->sc_firsts[CHET_IE] = scsi_2btoul(ea->fieea);
 633                         softc->sc_counts[CHET_IE] = scsi_2btoul(ea->niee);
 634                         softc->sc_firsts[CHET_DT] = scsi_2btoul(ea->fdtea);
 635                         softc->sc_counts[CHET_DT] = scsi_2btoul(ea->ndte);
 636                         softc->sc_picker = softc->sc_firsts[CHET_MT];
 637
 638 #define PLURAL(c)       (c) == 1 ? "" : "s"
 639                         snprintf(announce_buf, sizeof(announce_buf),
 640                                 "%d slot%s, %d drive%s, "
 641                                 "%d picker%s, %d portal%s",
 642                                 softc->sc_counts[CHET_ST],
 643                                 PLURAL(softc->sc_counts[CHET_ST]),
 644                                 softc->sc_counts[CHET_DT],
 645                                 PLURAL(softc->sc_counts[CHET_DT]),
 646                                 softc->sc_counts[CHET_MT],
 647                                 PLURAL(softc->sc_counts[CHET_MT]),
 648                                 softc->sc_counts[CHET_IE],
 649                                 PLURAL(softc->sc_counts[CHET_IE]));
 650 #undef PLURAL
 651                         if (announce_buf[0] != '\0') {
 652                                 xpt_announce_periph(periph, announce_buf);
 653                                 xpt_announce_quirks(periph, softc->quirks,
 654                                     CH_Q_BIT_STRING);
 655                         }
 656                 } else {
 657                         int error;
 658
 659                         error = cherror(done_ccb, CAM_RETRY_SELTO,
 660                                         SF_RETRY_UA | SF_NO_PRINT);
 661                         /*
 662                          * Retry any UNIT ATTENTION type errors.  They
 663                          * are expected at boot.
 664                          */
 665                         if (error == ERESTART) {
 666                                 /*
 667                                  * A retry was scheduled, so
 668                                  * just return.
 669                                  */
 670                                 return;
 671                         } else if (error != 0) {
 672                                 struct scsi_mode_sense_6 *sms;
 673                                 int frozen, retry_scheduled;
 674
 675                                 sms = (struct scsi_mode_sense_6 *)
 676                                         done_ccb->csio.cdb_io.cdb_bytes;
 677                                 frozen = (done_ccb->ccb_h.status &
 678                                     CAM_DEV_QFRZN) != 0;
 679
 680                                 /*
 681                                  * Check to see if block descriptors were
 682                                  * disabled.  Some devices don't like that.
 683                                  * We're taking advantage of the fact that
 684                                  * the first few bytes of the 6 and 10 byte
 685                                  * mode sense commands are the same.  If
 686                                  * block descriptors were disabled, enable
 687                                  * them and re-send the command.
 688                                  */
 689                                 if ((sms->byte2 & SMS_DBD) != 0 &&
 690                                     (periph->flags & CAM_PERIPH_INVALID) == 0) {
 691                                         sms->byte2 &= ~SMS_DBD;
 692                                         xpt_action(done_ccb);
 693                                         softc->quirks |= CH_Q_NO_DBD;
 694                                         retry_scheduled = 1;
 695                                 } else
 696                                         retry_scheduled = 0;
 697
 698                                 /* Don't wedge this device's queue */
 699                                 if (frozen)
 700                                         cam_release_devq(done_ccb->ccb_h.path,
 701                                                  /*relsim_flags*/0,
 702                                                  /*reduction*/0,
 703                                                  /*timeout*/0,
 704                                                  /*getcount_only*/0);
 705
 706                                 if (retry_scheduled)
 707                                         return;
 708
 709                                 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK)
 710                                     == CAM_SCSI_STATUS_ERROR)
 711                                         scsi_sense_print(&done_ccb->csio);
 712                                 else {
 713                                         xpt_print(periph->path,
 714                                             "got CAM status %#x\n",
 715                                             done_ccb->ccb_h.status);
 716                                 }
 717                                 xpt_print(periph->path, "fatal error, failed "
 718                                     "to attach to device\n");
 719
 720                                 cam_periph_invalidate(periph);
 721
 722                         }
 723                 }
 724                 softc->state = CH_STATE_NORMAL;
 725                 free(mode_header, M_SCSICH);
 726                 /*
 727                  * Since our peripheral may be invalidated by an error
 728                  * above or an external event, we must release our CCB
 729                  * before releasing the probe lock on the peripheral.
 730                  * The peripheral will only go away once the last lock
 731                  * is removed, and we need it around for the CCB release
 732                  * operation.
 733                  */
 734                 xpt_release_ccb(done_ccb);
 735                 cam_periph_unhold(periph);
 736                 return;
 737         }
 738         default:
 739                 break;
 740         }
 741         xpt_release_ccb(done_ccb);
 742 }
 743
 744 static int
 745 cherror(union ccb *ccb, u_int32_t cam_flags, u_int32_t sense_flags)
 746 {
 747         struct ch_softc *softc;
 748         struct cam_periph *periph;
 749
 750         periph = xpt_path_periph(ccb->ccb_h.path);
 751         softc = (struct ch_softc *)periph->softc;
 752
 753         return (cam_periph_error(ccb, cam_flags, sense_flags,
 754                                  &softc->saved_ccb));
 755 }
 756
 757 static int
 758 chioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
 759 {
 760         struct cam_periph *periph;
 761         struct ch_softc *softc;
 762         int error;
 763
 764         periph = (struct cam_periph *)dev->si_drv1;
 765         cam_periph_lock(periph);
 766         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("entering chioctl\n"));
 767
 768         softc = (struct ch_softc *)periph->softc;
 769
 770         error = 0;
 771
 772         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE,
 773                   ("trying to do ioctl %#lx\n", cmd));
 774
 775         /*
 776          * If this command can change the device's state, we must
 777          * have the device open for writing.
 778          */
 779         switch (cmd) {
 780         case CHIOGPICKER:
 781         case CHIOGPARAMS:
 782         case OCHIOGSTATUS:
 783         case CHIOGSTATUS:
 784                 break;
 785
 786         default:
 787                 if ((flag & FWRITE) == 0) {
 788                         cam_periph_unlock(periph);
 789                         return (EBADF);
 790                 }
 791         }
 792
 793         switch (cmd) {
 794         case CHIOMOVE:
 795                 error = chmove(periph, (struct changer_move *)addr);
 796                 break;
 797
 798         case CHIOEXCHANGE:
 799                 error = chexchange(periph, (struct changer_exchange *)addr);
 800                 break;
 801
 802         case CHIOPOSITION:
 803                 error = chposition(periph, (struct changer_position *)addr);
 804                 break;
 805
 806         case CHIOGPICKER:
 807                 *(int *)addr = softc->sc_picker - softc->sc_firsts[CHET_MT];
 808                 break;
 809
 810         case CHIOSPICKER:
 811         {
 812                 int new_picker = *(int *)addr;
 813
 814                 if (new_picker > (softc->sc_counts[CHET_MT] - 1)) {
 815                         error = EINVAL;
 816                         break;
 817                 }
 818                 softc->sc_picker = softc->sc_firsts[CHET_MT] + new_picker;
 819                 break;
 820         }
 821         case CHIOGPARAMS:
 822         {
 823                 struct changer_params *cp = (struct changer_params *)addr;
 824
 825                 cp->cp_npickers = softc->sc_counts[CHET_MT];
 826                 cp->cp_nslots = softc->sc_counts[CHET_ST];
 827                 cp->cp_nportals = softc->sc_counts[CHET_IE];
 828                 cp->cp_ndrives = softc->sc_counts[CHET_DT];
 829                 break;
 830         }
 831         case CHIOIELEM:
 832                 error = chielem(periph, *(unsigned int *)addr);
 833                 break;
 834
 835         case OCHIOGSTATUS:
 836         {
 837                 error = chgetelemstatus(periph, SCSI_REV_2, cmd,
 838                     (struct changer_element_status_request *)addr);
 839                 break;
 840         }
 841
 842         case CHIOGSTATUS:
 843         {
 844                 int scsi_version;
 845
 846                 scsi_version = chscsiversion(periph);
 847                 if (scsi_version >= SCSI_REV_0) {
 848                         error = chgetelemstatus(periph, scsi_version, cmd,
 849                             (struct changer_element_status_request *)addr);
 850                 }
 851                 else { /* unable to determine the SCSI version */
 852                         cam_periph_unlock(periph);
 853                         return (ENXIO);
 854                 }
 855                 break;
 856         }
 857
 858         case CHIOSETVOLTAG:
 859         {
 860                 error = chsetvoltag(periph,
 861                                     (struct changer_set_voltag_request *) addr);
 862                 break;
 863         }
 864
 865         /* Implement prevent/allow? */
 866
 867         default:
 868                 error = cam_periph_ioctl(periph, cmd, addr, cherror);
 869                 break;
 870         }
 871
 872         cam_periph_unlock(periph);
 873         return (error);
 874 }
 875
 876 static int
 877 chmove(struct cam_periph *periph, struct changer_move *cm)
 878 {
 879         struct ch_softc *softc;
 880         u_int16_t fromelem, toelem;
 881         union ccb *ccb;
 882         int error;
 883
 884         error = 0;
 885         softc = (struct ch_softc *)periph->softc;
 886
 887         /*
 888          * Check arguments.
 889          */
 890         if ((cm->cm_fromtype > CHET_DT) || (cm->cm_totype > CHET_DT))
 891                 return (EINVAL);
 892         if ((cm->cm_fromunit > (softc->sc_counts[cm->cm_fromtype] - 1)) ||
 893             (cm->cm_tounit > (softc->sc_counts[cm->cm_totype] - 1)))
 894                 return (ENODEV);
 895
 896         /*
 897          * Check the request against the changer's capabilities.
 898          */
 899         if ((softc->sc_movemask[cm->cm_fromtype] & (1 << cm->cm_totype)) == 0)
 900                 return (ENODEV);
 901
 902         /*
 903          * Calculate the source and destination elements.
 904          */
 905         fromelem = softc->sc_firsts[cm->cm_fromtype] + cm->cm_fromunit;
 906         toelem = softc->sc_firsts[cm->cm_totype] + cm->cm_tounit;
 907
 908         ccb = cam_periph_getccb(periph, CAM_PRIORITY_NORMAL);
 909
 910         scsi_move_medium(&ccb->csio,
 911                          /* retries */ 1,
 912                          /* cbfcnp */ chdone,
 913                          /* tag_action */ MSG_SIMPLE_Q_TAG,
 914                          /* tea */ softc->sc_picker,
 915                          /* src */ fromelem,
 916                          /* dst */ toelem,
 917                          /* invert */ (cm->cm_flags & CM_INVERT) ? TRUE : FALSE,
 918                          /* sense_len */ SSD_FULL_SIZE,
 919                          /* timeout */ CH_TIMEOUT_MOVE_MEDIUM);
 920
 921         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/CAM_RETRY_SELTO,
 922                                   /*sense_flags*/ SF_RETRY_UA,
 923                                   softc->device_stats);
 924
 925         xpt_release_ccb(ccb);
 926
 927         return(error);
 928 }
 929
 930 static int
 931 chexchange(struct cam_periph *periph, struct changer_exchange *ce)
 932 {
 933         struct ch_softc *softc;
 934         u_int16_t src, dst1, dst2;
 935         union ccb *ccb;
 936         int error;
 937
 938         error = 0;
 939         softc = (struct ch_softc *)periph->softc;
 940         /*
 941          * Check arguments.
 942          */
 943         if ((ce->ce_srctype > CHET_DT) || (ce->ce_fdsttype > CHET_DT) ||
 944             (ce->ce_sdsttype > CHET_DT))
 945                 return (EINVAL);
 946         if ((ce->ce_srcunit > (softc->sc_counts[ce->ce_srctype] - 1)) ||
 947             (ce->ce_fdstunit > (softc->sc_counts[ce->ce_fdsttype] - 1)) ||
 948             (ce->ce_sdstunit > (softc->sc_counts[ce->ce_sdsttype] - 1)))
 949                 return (ENODEV);
 950
 951         /*
 952          * Check the request against the changer's capabilities.
 953          */
 954         if (((softc->sc_exchangemask[ce->ce_srctype] &
 955              (1 << ce->ce_fdsttype)) == 0) ||
 956             ((softc->sc_exchangemask[ce->ce_fdsttype] &
 957              (1 << ce->ce_sdsttype)) == 0))
 958                 return (ENODEV);
 959
 960         /*
 961          * Calculate the source and destination elements.
 962          */
 963         src = softc->sc_firsts[ce->ce_srctype] + ce->ce_srcunit;
 964         dst1 = softc->sc_firsts[ce->ce_fdsttype] + ce->ce_fdstunit;
 965         dst2 = softc->sc_firsts[ce->ce_sdsttype] + ce->ce_sdstunit;
 966
 967         ccb = cam_periph_getccb(periph, CAM_PRIORITY_NORMAL);
 968
 969         scsi_exchange_medium(&ccb->csio,
 970                              /* retries */ 1,
 971                              /* cbfcnp */ chdone,
 972                              /* tag_action */ MSG_SIMPLE_Q_TAG,
 973                              /* tea */ softc->sc_picker,
 974                              /* src */ src,
 975                              /* dst1 */ dst1,
 976                              /* dst2 */ dst2,
 977                              /* invert1 */ (ce->ce_flags & CE_INVERT1) ?
 978                                            TRUE : FALSE,
 979                              /* invert2 */ (ce->ce_flags & CE_INVERT2) ?
 980                                            TRUE : FALSE,
 981                              /* sense_len */ SSD_FULL_SIZE,
 982                              /* timeout */ CH_TIMEOUT_EXCHANGE_MEDIUM);
 983
 984         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/CAM_RETRY_SELTO,
 985                                   /*sense_flags*/ SF_RETRY_UA,
 986                                   softc->device_stats);
 987
 988         xpt_release_ccb(ccb);
 989
 990         return(error);
 991 }
 992
 993 static int
 994 chposition(struct cam_periph *periph, struct changer_position *cp)
 995 {
 996         struct ch_softc *softc;
 997         u_int16_t dst;
 998         union ccb *ccb;
 999         int error;
1000
1001         error = 0;
1002         softc = (struct ch_softc *)periph->softc;
1003
1004         /*
1005          * Check arguments.
1006          */
1007         if (cp->cp_type > CHET_DT)
1008                 return (EINVAL);
1009         if (cp->cp_unit > (softc->sc_counts[cp->cp_type] - 1))
1010                 return (ENODEV);
1011
1012         /*
1013          * Calculate the destination element.
1014          */
1015         dst = softc->sc_firsts[cp->cp_type] + cp->cp_unit;
1016
1017         ccb = cam_periph_getccb(periph, CAM_PRIORITY_NORMAL);
1018
1019         scsi_position_to_element(&ccb->csio,
1020                                  /* retries */ 1,
1021                                  /* cbfcnp */ chdone,
1022                                  /* tag_action */ MSG_SIMPLE_Q_TAG,
1023                                  /* tea */ softc->sc_picker,
1024                                  /* dst */ dst,
1025                                  /* invert */ (cp->cp_flags & CP_INVERT) ?
1026                                               TRUE : FALSE,
1027                                  /* sense_len */ SSD_FULL_SIZE,
1028                                  /* timeout */ CH_TIMEOUT_POSITION_TO_ELEMENT);
1029
1030         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
1031                                   /*sense_flags*/ SF_RETRY_UA,
1032                                   softc->device_stats);
1033
1034         xpt_release_ccb(ccb);
1035
1036         return(error);
1037 }
1038
1039 /*
1040  * Copy a volume tag to a volume_tag struct, converting SCSI byte order
1041  * to host native byte order in the volume serial number.  The volume
1042  * label as returned by the changer is transferred to user mode as
1043  * nul-terminated string.  Volume labels are truncated at the first
1044  * space, as suggested by SCSI-2.
1045  */
1046 static  void
1047 copy_voltag(struct changer_voltag *uvoltag, struct volume_tag *voltag)
1048 {
1049         int i;
1050         for (i=0; i<CH_VOLTAG_MAXLEN; i++) {
1051                 char c = voltag->vif[i];
1052                 if (c && c != ' ')
1053                         uvoltag->cv_volid[i] = c;
1054                 else
1055                         break;
1056         }
1057         uvoltag->cv_serial = scsi_2btoul(voltag->vsn);
1058 }
1059
1060 /*
1061  * Copy an element status descriptor to a user-mode
1062  * changer_element_status structure.
1063  */
1064 static void
1065 copy_element_status(struct ch_softc *softc,
1066                     u_int16_t flags,
1067                     struct read_element_status_descriptor *desc,
1068                     struct changer_element_status *ces,
1069                     int scsi_version)
1070 {
1071         u_int16_t eaddr = scsi_2btoul(desc->eaddr);
1072         u_int16_t et;
1073         struct volume_tag *pvol_tag = NULL, *avol_tag = NULL;
1074         struct read_element_status_device_id *devid = NULL;
1075
1076         ces->ces_int_addr = eaddr;
1077         /* set up logical address in element status */
1078         for (et = CHET_MT; et <= CHET_DT; et++) {
1079                 if ((softc->sc_firsts[et] <= eaddr)
1080                     && ((softc->sc_firsts[et] + softc->sc_counts[et])
1081                         > eaddr)) {
1082                         ces->ces_addr = eaddr - softc->sc_firsts[et];
1083                         ces->ces_type = et;
1084                         break;
1085                 }
1086         }
1087
1088         ces->ces_flags = desc->flags1;
1089
1090         ces->ces_sensecode = desc->sense_code;
1091         ces->ces_sensequal = desc->sense_qual;
1092
1093         if (desc->flags2 & READ_ELEMENT_STATUS_INVERT)
1094                 ces->ces_flags |= CES_INVERT;
1095
1096         if (desc->flags2 & READ_ELEMENT_STATUS_SVALID) {
1097
1098                 eaddr = scsi_2btoul(desc->ssea);
1099
1100                 /* convert source address to logical format */
1101                 for (et = CHET_MT; et <= CHET_DT; et++) {
1102                         if ((softc->sc_firsts[et] <= eaddr)
1103                             && ((softc->sc_firsts[et] + softc->sc_counts[et])
1104                                 > eaddr)) {
1105                                 ces->ces_source_addr =
1106                                         eaddr - softc->sc_firsts[et];
1107                                 ces->ces_source_type = et;
1108                                 ces->ces_flags |= CES_SOURCE_VALID;
1109                                 break;
1110                         }
1111                 }
1112
1113                 if (!(ces->ces_flags & CES_SOURCE_VALID))
1114                         printf("ch: warning: could not map element source "
1115                                "address %ud to a valid element type\n",
1116                                eaddr);
1117         }
1118
1119         /*
1120          * pvoltag and avoltag are common between SCSI-2 and later versions
1121          */
1122         if (flags & READ_ELEMENT_STATUS_PVOLTAG)
1123                 pvol_tag = &desc->voltag_devid.pvoltag;
1124         if (flags & READ_ELEMENT_STATUS_AVOLTAG)
1125                 avol_tag = (flags & READ_ELEMENT_STATUS_PVOLTAG) ?
1126                     &desc->voltag_devid.voltag[1] :&desc->voltag_devid.pvoltag;
1127         /*
1128          * For SCSI-3 and later, element status can carry designator and
1129          * other information.
1130          */
1131         if (scsi_version >= SCSI_REV_SPC) {
1132                 if ((flags & READ_ELEMENT_STATUS_PVOLTAG) ^
1133                     (flags & READ_ELEMENT_STATUS_AVOLTAG))
1134                         devid = &desc->voltag_devid.pvol_and_devid.devid;
1135                 else if (!(flags & READ_ELEMENT_STATUS_PVOLTAG) &&
1136                          !(flags & READ_ELEMENT_STATUS_AVOLTAG))
1137                         devid = &desc->voltag_devid.devid;
1138                 else /* Have both PVOLTAG and AVOLTAG */
1139                         devid = &desc->voltag_devid.vol_tags_and_devid.devid;
1140         }
1141
1142         if (pvol_tag)
1143                 copy_voltag(&(ces->ces_pvoltag), pvol_tag);
1144         if (avol_tag)
1145                 copy_voltag(&(ces->ces_pvoltag), avol_tag);
1146         if (devid != NULL) {
1147                 if (devid->designator_length > 0) {
1148                         bcopy((void *)devid->designator,
1149                               (void *)ces->ces_designator,
1150                               devid->designator_length);
1151                         ces->ces_designator_length = devid->designator_length;
1152                         /*
1153                          * Make sure we are always NUL terminated.  The
1154                          * This won't matter for the binary code set,
1155                          * since the user will only pay attention to the
1156                          * length field.
1157                          */
1158                         ces->ces_designator[devid->designator_length]= '\0';
1159                 }
1160                 if (devid->piv_assoc_designator_type &
1161                     READ_ELEMENT_STATUS_PIV_SET) {
1162                         ces->ces_flags |= CES_PIV;
1163                         ces->ces_protocol_id =
1164                             READ_ELEMENT_STATUS_PROTOCOL_ID(
1165                             devid->prot_code_set);
1166                 }
1167                 ces->ces_code_set =
1168                     READ_ELEMENT_STATUS_CODE_SET(devid->prot_code_set);
1169                 ces->ces_assoc = READ_ELEMENT_STATUS_ASSOCIATION(
1170                     devid->piv_assoc_designator_type);
1171                 ces->ces_designator_type = READ_ELEMENT_STATUS_DESIGNATOR_TYPE(
1172                     devid->piv_assoc_designator_type);
1173         } else if (scsi_version > SCSI_REV_2) {
1174                 /* SCSI-SPC and No devid, no designator */
1175                 ces->ces_designator_length = 0;
1176                 ces->ces_designator[0] = '\0';
1177                 ces->ces_protocol_id = CES_PROTOCOL_ID_FCP_4;
1178         }
1179
1180         if (scsi_version <= SCSI_REV_2) {
1181                 if (desc->dt_or_obsolete.scsi_2.dt_scsi_flags &
1182                     READ_ELEMENT_STATUS_DT_IDVALID) {
1183                         ces->ces_flags |= CES_SCSIID_VALID;
1184                         ces->ces_scsi_id =
1185                             desc->dt_or_obsolete.scsi_2.dt_scsi_addr;
1186                 }
1187
1188                 if (desc->dt_or_obsolete.scsi_2.dt_scsi_addr &
1189                     READ_ELEMENT_STATUS_DT_LUVALID) {
1190                         ces->ces_flags |= CES_LUN_VALID;
1191                         ces->ces_scsi_lun =
1192                             desc->dt_or_obsolete.scsi_2.dt_scsi_flags &
1193                             READ_ELEMENT_STATUS_DT_LUNMASK;
1194                 }
1195         }
1196 }
1197
1198 static int
1199 chgetelemstatus(struct cam_periph *periph, int scsi_version, u_long cmd,
1200                 struct changer_element_status_request *cesr)
1201 {
1202         struct read_element_status_header *st_hdr;
1203         struct read_element_status_page_header *pg_hdr;
1204         struct read_element_status_descriptor *desc;
1205         caddr_t data = NULL;
1206         size_t size, desclen;
1207         int avail, i, error = 0;
1208         int curdata, dvcid, sense_flags;
1209         int try_no_dvcid = 0;
1210         struct changer_element_status *user_data = NULL;
1211         struct ch_softc *softc;
1212         union ccb *ccb;
1213         int chet = cesr->cesr_element_type;
1214         int want_voltags = (cesr->cesr_flags & CESR_VOLTAGS) ? 1 : 0;
1215
1216         softc = (struct ch_softc *)periph->softc;
1217
1218         /* perform argument checking */
1219
1220         /*
1221          * Perform a range check on the cesr_element_{base,count}
1222          * request argument fields.
1223          */
1224         if ((softc->sc_counts[chet] - cesr->cesr_element_base) <= 0
1225             || (cesr->cesr_element_base + cesr->cesr_element_count)
1226                 > softc->sc_counts[chet])
1227                 return (EINVAL);
1228
1229         /*
1230          * Request one descriptor for the given element type.  This
1231          * is used to determine the size of the descriptor so that
1232          * we can allocate enough storage for all of them.  We assume
1233          * that the first one can fit into 1k.
1234          */
1235         cam_periph_unlock(periph);
1236         data = (caddr_t)malloc(1024, M_DEVBUF, M_WAITOK);
1237
1238         cam_periph_lock(periph);
1239         ccb = cam_periph_getccb(periph, CAM_PRIORITY_NORMAL);
1240
1241         sense_flags = SF_RETRY_UA;
1242         if (softc->quirks & CH_Q_NO_DVCID) {
1243                 dvcid = 0;
1244                 curdata = 0;
1245         } else {
1246                 dvcid = 1;
1247                 curdata = 1;
1248                 /*
1249                  * Don't print anything for an Illegal Request, because
1250                  * these flags can cause some changers to complain.  We'll
1251                  * retry without them if we get an error.
1252                  */
1253                 sense_flags |= SF_QUIET_IR;
1254         }
1255
1256 retry_einval:
1257
1258         scsi_read_element_status(&ccb->csio,
1259                                  /* retries */ 1,
1260                                  /* cbfcnp */ chdone,
1261                                  /* tag_action */ MSG_SIMPLE_Q_TAG,
1262                                  /* voltag */ want_voltags,
1263                                  /* sea */ softc->sc_firsts[chet],
1264                                  /* curdata */ curdata,
1265                                  /* dvcid */ dvcid,
1266                                  /* count */ 1,
1267                                  /* data_ptr */ data,
1268                                  /* dxfer_len */ 1024,
1269                                  /* sense_len */ SSD_FULL_SIZE,
1270                                  /* timeout */ CH_TIMEOUT_READ_ELEMENT_STATUS);
1271
1272         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
1273                                   /*sense_flags*/ sense_flags,
1274                                   softc->device_stats);
1275
1276         /*
1277          * An Illegal Request sense key (only used if there is no asc/ascq)
1278          * or 0x24,0x00 for an ASC/ASCQ both map to EINVAL.  If dvcid or
1279          * curdata are set (we set both or neither), try turning them off
1280          * and see if the command is successful.
1281          */
1282         if ((error == EINVAL)
1283          && (dvcid || curdata))  {
1284                 dvcid = 0;
1285                 curdata = 0;
1286                 error = 0;
1287                 /* At this point we want to report any Illegal Request */
1288                 sense_flags &= ~SF_QUIET_IR;
1289                 try_no_dvcid = 1;
1290                 goto retry_einval;
1291         }
1292
1293         /*
1294          * In this case, we tried a read element status with dvcid and
1295          * curdata set, and it failed.  We retried without those bits, and
1296          * it succeeded.  Suggest to the user that he set a quirk, so we
1297          * don't go through the retry process the first time in the future.
1298          * This should only happen on changers that claim SCSI-3 or higher,
1299          * but don't support these bits.
1300          */
1301         if ((try_no_dvcid != 0)
1302          && (error == 0))
1303                 softc->quirks |= CH_Q_NO_DVCID;
1304
1305         if (error)
1306                 goto done;
1307         cam_periph_unlock(periph);
1308
1309         st_hdr = (struct read_element_status_header *)data;
1310         pg_hdr = (struct read_element_status_page_header *)((uintptr_t)st_hdr +
1311                   sizeof(struct read_element_status_header));
1312         desclen = scsi_2btoul(pg_hdr->edl);
1313
1314         size = sizeof(struct read_element_status_header) +
1315                sizeof(struct read_element_status_page_header) +
1316                (desclen * cesr->cesr_element_count);
1317         /*
1318          * Reallocate storage for descriptors and get them from the
1319          * device.
1320          */
1321         free(data, M_DEVBUF);
1322         data = (caddr_t)malloc(size, M_DEVBUF, M_WAITOK);
1323
1324         cam_periph_lock(periph);
1325         scsi_read_element_status(&ccb->csio,
1326                                  /* retries */ 1,
1327                                  /* cbfcnp */ chdone,
1328                                  /* tag_action */ MSG_SIMPLE_Q_TAG,
1329                                  /* voltag */ want_voltags,
1330                                  /* sea */ softc->sc_firsts[chet]
1331                                  + cesr->cesr_element_base,
1332                                  /* curdata */ curdata,
1333                                  /* dvcid */ dvcid,
1334                                  /* count */ cesr->cesr_element_count,
1335                                  /* data_ptr */ data,
1336                                  /* dxfer_len */ size,
1337                                  /* sense_len */ SSD_FULL_SIZE,
1338                                  /* timeout */ CH_TIMEOUT_READ_ELEMENT_STATUS);
1339
1340         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
1341                                   /*sense_flags*/ SF_RETRY_UA,
1342                                   softc->device_stats);
1343
1344         if (error)
1345                 goto done;
1346         cam_periph_unlock(periph);
1347
1348         /*
1349          * Fill in the user status array.
1350          */
1351         st_hdr = (struct read_element_status_header *)data;
1352         pg_hdr = (struct read_element_status_page_header *)((uintptr_t)st_hdr +
1353                   sizeof(struct read_element_status_header));
1354         avail = scsi_2btoul(st_hdr->count);
1355
1356         if (avail != cesr->cesr_element_count) {
1357                 xpt_print(periph->path,
1358                     "warning, READ ELEMENT STATUS avail != count\n");
1359         }
1360
1361         user_data = (struct changer_element_status *)
1362                 malloc(avail * sizeof(struct changer_element_status),
1363                        M_DEVBUF, M_WAITOK | M_ZERO);
1364
1365         desc = (struct read_element_status_descriptor *)((uintptr_t)data +
1366                 sizeof(struct read_element_status_header) +
1367                 sizeof(struct read_element_status_page_header));
1368         /*
1369          * Set up the individual element status structures
1370          */
1371         for (i = 0; i < avail; ++i) {
1372                 struct changer_element_status *ces;
1373
1374                 /*
1375                  * In the changer_element_status structure, fields from
1376                  * the beginning to the field of ces_scsi_lun are common
1377                  * between SCSI-2 and SCSI-3, while all the rest are new
1378                  * from SCSI-3. In order to maintain backward compatibility
1379                  * of the chio command, the ces pointer, below, is computed
1380                  * such that it lines up with the structure boundary
1381                  * corresponding to the SCSI version.
1382                  */
1383                 ces = cmd == OCHIOGSTATUS ?
1384                     (struct changer_element_status *)
1385                     ((unsigned char *)user_data + i *
1386                      (offsetof(struct changer_element_status,ces_scsi_lun)+1)):
1387                     &user_data[i];
1388
1389                 copy_element_status(softc, pg_hdr->flags, desc,
1390                                     ces, scsi_version);
1391
1392                 desc = (struct read_element_status_descriptor *)
1393                        ((unsigned char *)desc + desclen);
1394         }
1395
1396         /* Copy element status structures out to userspace. */
1397         if (cmd == OCHIOGSTATUS)
1398                 error = copyout(user_data,
1399                                 cesr->cesr_element_status,
1400                                 avail* (offsetof(struct changer_element_status,
1401                                 ces_scsi_lun) + 1));
1402         else
1403                 error = copyout(user_data,
1404                                 cesr->cesr_element_status,
1405                                 avail * sizeof(struct changer_element_status));
1406
1407         cam_periph_lock(periph);
1408
1409  done:
1410         xpt_release_ccb(ccb);
1411
1412         if (data != NULL)
1413                 free(data, M_DEVBUF);
1414         if (user_data != NULL)
1415                 free(user_data, M_DEVBUF);
1416
1417         return (error);
1418 }
1419
1420 static int
1421 chielem(struct cam_periph *periph,
1422         unsigned int timeout)
1423 {
1424         union ccb *ccb;
1425         struct ch_softc *softc;
1426         int error;
1427
1428         if (!timeout) {
1429                 timeout = CH_TIMEOUT_INITIALIZE_ELEMENT_STATUS;
1430         } else {
1431                 timeout *= 1000;
1432         }
1433
1434         error = 0;
1435         softc = (struct ch_softc *)periph->softc;
1436
1437         ccb = cam_periph_getccb(periph, CAM_PRIORITY_NORMAL);
1438
1439         scsi_initialize_element_status(&ccb->csio,
1440                                       /* retries */ 1,
1441                                       /* cbfcnp */ chdone,
1442                                       /* tag_action */ MSG_SIMPLE_Q_TAG,
1443                                       /* sense_len */ SSD_FULL_SIZE,
1444                                       /* timeout */ timeout);
1445
1446         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
1447                                   /*sense_flags*/ SF_RETRY_UA,
1448                                   softc->device_stats);
1449
1450         xpt_release_ccb(ccb);
1451
1452         return(error);
1453 }
1454
1455 static int
1456 chsetvoltag(struct cam_periph *periph,
1457             struct changer_set_voltag_request *csvr)
1458 {
1459         union ccb *ccb;
1460         struct ch_softc *softc;
1461         u_int16_t ea;
1462         u_int8_t sac;
1463         struct scsi_send_volume_tag_parameters ssvtp;
1464         int error;
1465         int i;
1466
1467         error = 0;
1468         softc = (struct ch_softc *)periph->softc;
1469
1470         bzero(&ssvtp, sizeof(ssvtp));
1471         for (i=0; i<sizeof(ssvtp.vitf); i++) {
1472                 ssvtp.vitf[i] = ' ';
1473         }
1474
1475         /*
1476          * Check arguments.
1477          */
1478         if (csvr->csvr_type > CHET_DT)
1479                 return EINVAL;
1480         if (csvr->csvr_addr > (softc->sc_counts[csvr->csvr_type] - 1))
1481                 return ENODEV;
1482
1483         ea = softc->sc_firsts[csvr->csvr_type] + csvr->csvr_addr;
1484
1485         if (csvr->csvr_flags & CSVR_ALTERNATE) {
1486                 switch (csvr->csvr_flags & CSVR_MODE_MASK) {
1487                 case CSVR_MODE_SET:
1488                         sac = SEND_VOLUME_TAG_ASSERT_ALTERNATE;
1489                         break;
1490                 case CSVR_MODE_REPLACE:
1491                         sac = SEND_VOLUME_TAG_REPLACE_ALTERNATE;
1492                         break;
1493                 case CSVR_MODE_CLEAR:
1494                         sac = SEND_VOLUME_TAG_UNDEFINED_ALTERNATE;
1495                         break;
1496                 default:
1497                         error = EINVAL;
1498                         goto out;
1499                 }
1500         } else {
1501                 switch (csvr->csvr_flags & CSVR_MODE_MASK) {
1502                 case CSVR_MODE_SET:
1503                         sac = SEND_VOLUME_TAG_ASSERT_PRIMARY;
1504                         break;
1505                 case CSVR_MODE_REPLACE:
1506                         sac = SEND_VOLUME_TAG_REPLACE_PRIMARY;
1507                         break;
1508                 case CSVR_MODE_CLEAR:
1509                         sac = SEND_VOLUME_TAG_UNDEFINED_PRIMARY;
1510                         break;
1511                 default:
1512                         error = EINVAL;
1513                         goto out;
1514                 }
1515         }
1516
1517         memcpy(ssvtp.vitf, csvr->csvr_voltag.cv_volid,
1518                min(strlen(csvr->csvr_voltag.cv_volid), sizeof(ssvtp.vitf)));
1519         scsi_ulto2b(csvr->csvr_voltag.cv_serial, ssvtp.minvsn);
1520
1521         ccb = cam_periph_getccb(periph, CAM_PRIORITY_NORMAL);
1522
1523         scsi_send_volume_tag(&ccb->csio,
1524                              /* retries */ 1,
1525                              /* cbfcnp */ chdone,
1526                              /* tag_action */ MSG_SIMPLE_Q_TAG,
1527                              /* element_address */ ea,
1528                              /* send_action_code */ sac,
1529                              /* parameters */ &ssvtp,
1530                              /* sense_len */ SSD_FULL_SIZE,
1531                              /* timeout */ CH_TIMEOUT_SEND_VOLTAG);
1532
1533         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
1534                                   /*sense_flags*/ SF_RETRY_UA,
1535                                   softc->device_stats);
1536
1537         xpt_release_ccb(ccb);
1538
1539  out:
1540         return error;
1541 }
1542
1543 static int
1544 chgetparams(struct cam_periph *periph)
1545 {
1546         union ccb *ccb;
1547         struct ch_softc *softc;
1548         void *mode_buffer;
1549         int mode_buffer_len;
1550         struct page_element_address_assignment *ea;
1551         struct page_device_capabilities *cap;
1552         int error, from, dbd;
1553         u_int8_t *moves, *exchanges;
1554
1555         error = 0;
1556
1557         softc = (struct ch_softc *)periph->softc;
1558
1559         ccb = cam_periph_getccb(periph, CAM_PRIORITY_NORMAL);
1560
1561         /*
1562          * The scsi_mode_sense_data structure is just a convenience
1563          * structure that allows us to easily calculate the worst-case
1564          * storage size of the mode sense buffer.
1565          */
1566         mode_buffer_len = sizeof(struct scsi_mode_sense_data);
1567
1568         mode_buffer = malloc(mode_buffer_len, M_SCSICH, M_NOWAIT);
1569
1570         if (mode_buffer == NULL) {
1571                 printf("chgetparams: couldn't malloc mode sense data\n");
1572                 xpt_release_ccb(ccb);
1573                 return(ENOSPC);
1574         }
1575
1576         bzero(mode_buffer, mode_buffer_len);
1577
1578         if (softc->quirks & CH_Q_NO_DBD)
1579                 dbd = FALSE;
1580         else
1581                 dbd = TRUE;
1582
1583         /*
1584          * Get the element address assignment page.
1585          */
1586         scsi_mode_sense(&ccb->csio,
1587                         /* retries */ 1,
1588                         /* cbfcnp */ chdone,
1589                         /* tag_action */ MSG_SIMPLE_Q_TAG,
1590                         /* dbd */ dbd,
1591                         /* pc */ SMS_PAGE_CTRL_CURRENT,
1592                         /* page */ CH_ELEMENT_ADDR_ASSIGN_PAGE,
1593                         /* param_buf */ (u_int8_t *)mode_buffer,
1594                         /* param_len */ mode_buffer_len,
1595                         /* sense_len */ SSD_FULL_SIZE,
1596                         /* timeout */ CH_TIMEOUT_MODE_SENSE);
1597
1598         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
1599                                   /* sense_flags */ SF_RETRY_UA|SF_NO_PRINT,
1600                                   softc->device_stats);
1601
1602         if (error) {
1603                 if (dbd) {
1604                         struct scsi_mode_sense_6 *sms;
1605
1606                         sms = (struct scsi_mode_sense_6 *)
1607                                 ccb->csio.cdb_io.cdb_bytes;
1608
1609                         sms->byte2 &= ~SMS_DBD;
1610                         error = cam_periph_runccb(ccb, cherror,
1611                                                   /*cam_flags*/ CAM_RETRY_SELTO,
1612                                                   /*sense_flags*/ SF_RETRY_UA,
1613                                                   softc->device_stats);
1614                 } else {
1615                         /*
1616                          * Since we disabled sense printing above, print
1617                          * out the sense here since we got an error.
1618                          */
1619                         scsi_sense_print(&ccb->csio);
1620                 }
1621
1622                 if (error) {
1623                         xpt_print(periph->path,
1624                             "chgetparams: error getting element "
1625                             "address page\n");
1626                         xpt_release_ccb(ccb);
1627                         free(mode_buffer, M_SCSICH);
1628                         return(error);
1629                 }
1630         }
1631
1632         ea = (struct page_element_address_assignment *)
1633                 find_mode_page_6((struct scsi_mode_header_6 *)mode_buffer);
1634
1635         softc->sc_firsts[CHET_MT] = scsi_2btoul(ea->mtea);
1636         softc->sc_counts[CHET_MT] = scsi_2btoul(ea->nmte);
1637         softc->sc_firsts[CHET_ST] = scsi_2btoul(ea->fsea);
1638         softc->sc_counts[CHET_ST] = scsi_2btoul(ea->nse);
1639         softc->sc_firsts[CHET_IE] = scsi_2btoul(ea->fieea);
1640         softc->sc_counts[CHET_IE] = scsi_2btoul(ea->niee);
1641         softc->sc_firsts[CHET_DT] = scsi_2btoul(ea->fdtea);
1642         softc->sc_counts[CHET_DT] = scsi_2btoul(ea->ndte);
1643
1644         bzero(mode_buffer, mode_buffer_len);
1645
1646         /*
1647          * Now get the device capabilities page.
1648          */
1649         scsi_mode_sense(&ccb->csio,
1650                         /* retries */ 1,
1651                         /* cbfcnp */ chdone,
1652                         /* tag_action */ MSG_SIMPLE_Q_TAG,
1653                         /* dbd */ dbd,
1654                         /* pc */ SMS_PAGE_CTRL_CURRENT,
1655                         /* page */ CH_DEVICE_CAP_PAGE,
1656                         /* param_buf */ (u_int8_t *)mode_buffer,
1657                         /* param_len */ mode_buffer_len,
1658                         /* sense_len */ SSD_FULL_SIZE,
1659                         /* timeout */ CH_TIMEOUT_MODE_SENSE);
1660
1661         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
1662                                   /* sense_flags */ SF_RETRY_UA | SF_NO_PRINT,
1663                                   softc->device_stats);
1664
1665         if (error) {
1666                 if (dbd) {
1667                         struct scsi_mode_sense_6 *sms;
1668
1669                         sms = (struct scsi_mode_sense_6 *)
1670                                 ccb->csio.cdb_io.cdb_bytes;
1671
1672                         sms->byte2 &= ~SMS_DBD;
1673                         error = cam_periph_runccb(ccb, cherror,
1674                                                   /*cam_flags*/ CAM_RETRY_SELTO,
1675                                                   /*sense_flags*/ SF_RETRY_UA,
1676                                                   softc->device_stats);
1677                 } else {
1678                         /*
1679                          * Since we disabled sense printing above, print
1680                          * out the sense here since we got an error.
1681                          */
1682                         scsi_sense_print(&ccb->csio);
1683                 }
1684
1685                 if (error) {
1686                         xpt_print(periph->path,
1687                             "chgetparams: error getting device "
1688                             "capabilities page\n");
1689                         xpt_release_ccb(ccb);
1690                         free(mode_buffer, M_SCSICH);
1691                         return(error);
1692                 }
1693         }
1694
1695         xpt_release_ccb(ccb);
1696
1697         cap = (struct page_device_capabilities *)
1698                 find_mode_page_6((struct scsi_mode_header_6 *)mode_buffer);
1699
1700         bzero(softc->sc_movemask, sizeof(softc->sc_movemask));
1701         bzero(softc->sc_exchangemask, sizeof(softc->sc_exchangemask));
1702         moves = cap->move_from;
1703         exchanges = cap->exchange_with;
1704         for (from = CHET_MT; from <= CHET_MAX; ++from) {
1705                 softc->sc_movemask[from] = moves[from];
1706                 softc->sc_exchangemask[from] = exchanges[from];
1707         }
1708
1709         free(mode_buffer, M_SCSICH);
1710
1711         return(error);
1712 }
1713
1714 static int
1715 chscsiversion(struct cam_periph *periph)
1716 {
1717         struct scsi_inquiry_data *inq_data;
1718         struct ccb_getdev *cgd;
1719         int dev_scsi_version;
1720
1721         cam_periph_assert(periph, MA_OWNED);
1722         if ((cgd = (struct ccb_getdev *)xpt_alloc_ccb_nowait()) == NULL)
1723                 return (-1);
1724         /*
1725          * Get the device information.
1726          */
1727         xpt_setup_ccb(&cgd->ccb_h,
1728                       periph->path,
1729                       CAM_PRIORITY_NORMAL);
1730         cgd->ccb_h.func_code = XPT_GDEV_TYPE;
1731         xpt_action((union ccb *)cgd);
1732
1733         if (cgd->ccb_h.status != CAM_REQ_CMP) {
1734                 xpt_free_ccb((union ccb *)cgd);
1735                 return -1;
1736         }
1737
1738         inq_data = &cgd->inq_data;
1739         dev_scsi_version = inq_data->version;
1740         xpt_free_ccb((union ccb *)cgd);
1741
1742         return dev_scsi_version;
1743 }
1744
1745 void
1746 scsi_move_medium(struct ccb_scsiio *csio, u_int32_t retries,
1747                  void (*cbfcnp)(struct cam_periph *, union ccb *),
1748                  u_int8_t tag_action, u_int32_t tea, u_int32_t src,
1749                  u_int32_t dst, int invert, u_int8_t sense_len,
1750                  u_int32_t timeout)
1751 {
1752         struct scsi_move_medium *scsi_cmd;
1753
1754         scsi_cmd = (struct scsi_move_medium *)&csio->cdb_io.cdb_bytes;
1755         bzero(scsi_cmd, sizeof(*scsi_cmd));
1756
1757         scsi_cmd->opcode = MOVE_MEDIUM;
1758
1759         scsi_ulto2b(tea, scsi_cmd->tea);
1760         scsi_ulto2b(src, scsi_cmd->src);
1761         scsi_ulto2b(dst, scsi_cmd->dst);
1762
1763         if (invert)
1764                 scsi_cmd->invert |= MOVE_MEDIUM_INVERT;
1765
1766         cam_fill_csio(csio,
1767                       retries,
1768                       cbfcnp,
1769                       /*flags*/ CAM_DIR_NONE,
1770                       tag_action,
1771                       /*data_ptr*/ NULL,
1772                       /*dxfer_len*/ 0,
1773                       sense_len,
1774                       sizeof(*scsi_cmd),
1775                       timeout);
1776 }
1777
1778 void
1779 scsi_exchange_medium(struct ccb_scsiio *csio, u_int32_t retries,
1780                      void (*cbfcnp)(struct cam_periph *, union ccb *),
1781                      u_int8_t tag_action, u_int32_t tea, u_int32_t src,
1782                      u_int32_t dst1, u_int32_t dst2, int invert1,
1783                      int invert2, u_int8_t sense_len, u_int32_t timeout)
1784 {
1785         struct scsi_exchange_medium *scsi_cmd;
1786
1787         scsi_cmd = (struct scsi_exchange_medium *)&csio->cdb_io.cdb_bytes;
1788         bzero(scsi_cmd, sizeof(*scsi_cmd));
1789
1790         scsi_cmd->opcode = EXCHANGE_MEDIUM;
1791
1792         scsi_ulto2b(tea, scsi_cmd->tea);
1793         scsi_ulto2b(src, scsi_cmd->src);
1794         scsi_ulto2b(dst1, scsi_cmd->fdst);
1795         scsi_ulto2b(dst2, scsi_cmd->sdst);
1796
1797         if (invert1)
1798                 scsi_cmd->invert |= EXCHANGE_MEDIUM_INV1;
1799
1800         if (invert2)
1801                 scsi_cmd->invert |= EXCHANGE_MEDIUM_INV2;
1802
1803         cam_fill_csio(csio,
1804                       retries,
1805                       cbfcnp,
1806                       /*flags*/ CAM_DIR_NONE,
1807                       tag_action,
1808                       /*data_ptr*/ NULL,
1809                       /*dxfer_len*/ 0,
1810                       sense_len,
1811                       sizeof(*scsi_cmd),
1812                       timeout);
1813 }
1814
1815 void
1816 scsi_position_to_element(struct ccb_scsiio *csio, u_int32_t retries,
1817                          void (*cbfcnp)(struct cam_periph *, union ccb *),
1818                          u_int8_t tag_action, u_int32_t tea, u_int32_t dst,
1819                          int invert, u_int8_t sense_len, u_int32_t timeout)
1820 {
1821         struct scsi_position_to_element *scsi_cmd;
1822
1823         scsi_cmd = (struct scsi_position_to_element *)&csio->cdb_io.cdb_bytes;
1824         bzero(scsi_cmd, sizeof(*scsi_cmd));
1825
1826         scsi_cmd->opcode = POSITION_TO_ELEMENT;
1827
1828         scsi_ulto2b(tea, scsi_cmd->tea);
1829         scsi_ulto2b(dst, scsi_cmd->dst);
1830
1831         if (invert)
1832                 scsi_cmd->invert |= POSITION_TO_ELEMENT_INVERT;
1833
1834         cam_fill_csio(csio,
1835                       retries,
1836                       cbfcnp,
1837                       /*flags*/ CAM_DIR_NONE,
1838                       tag_action,
1839                       /*data_ptr*/ NULL,
1840                       /*dxfer_len*/ 0,
1841                       sense_len,
1842                       sizeof(*scsi_cmd),
1843                       timeout);
1844 }
1845
1846 void
1847 scsi_read_element_status(struct ccb_scsiio *csio, u_int32_t retries,
1848                          void (*cbfcnp)(struct cam_periph *, union ccb *),
1849                          u_int8_t tag_action, int voltag, u_int32_t sea,
1850                          int curdata, int dvcid,
1851                          u_int32_t count, u_int8_t *data_ptr,
1852                          u_int32_t dxfer_len, u_int8_t sense_len,
1853                          u_int32_t timeout)
1854 {
1855         struct scsi_read_element_status *scsi_cmd;
1856
1857         scsi_cmd = (struct scsi_read_element_status *)&csio->cdb_io.cdb_bytes;
1858         bzero(scsi_cmd, sizeof(*scsi_cmd));
1859
1860         scsi_cmd->opcode = READ_ELEMENT_STATUS;
1861
1862         scsi_ulto2b(sea, scsi_cmd->sea);
1863         scsi_ulto2b(count, scsi_cmd->count);
1864         scsi_ulto3b(dxfer_len, scsi_cmd->len);
1865         if (dvcid)
1866                 scsi_cmd->flags |= READ_ELEMENT_STATUS_DVCID;
1867         if (curdata)
1868                 scsi_cmd->flags |= READ_ELEMENT_STATUS_CURDATA;
1869
1870         if (voltag)
1871                 scsi_cmd->byte2 |= READ_ELEMENT_STATUS_VOLTAG;
1872
1873         cam_fill_csio(csio,
1874                       retries,
1875                       cbfcnp,
1876                       /*flags*/ CAM_DIR_IN,
1877                       tag_action,
1878                       data_ptr,
1879                       dxfer_len,
1880                       sense_len,
1881                       sizeof(*scsi_cmd),
1882                       timeout);
1883 }
1884
1885 void
1886 scsi_initialize_element_status(struct ccb_scsiio *csio, u_int32_t retries,
1887                                void (*cbfcnp)(struct cam_periph *, union ccb *),
1888                                u_int8_t tag_action, u_int8_t sense_len,
1889                                u_int32_t timeout)
1890 {
1891         struct scsi_initialize_element_status *scsi_cmd;
1892
1893         scsi_cmd = (struct scsi_initialize_element_status *)
1894                     &csio->cdb_io.cdb_bytes;
1895         bzero(scsi_cmd, sizeof(*scsi_cmd));
1896
1897         scsi_cmd->opcode = INITIALIZE_ELEMENT_STATUS;
1898
1899         cam_fill_csio(csio,
1900                       retries,
1901                       cbfcnp,
1902                       /*flags*/ CAM_DIR_NONE,
1903                       tag_action,
1904                       /* data_ptr */ NULL,
1905                       /* dxfer_len */ 0,
1906                       sense_len,
1907                       sizeof(*scsi_cmd),
1908                       timeout);
1909 }
1910
1911 void
1912 scsi_send_volume_tag(struct ccb_scsiio *csio, u_int32_t retries,
1913                      void (*cbfcnp)(struct cam_periph *, union ccb *),
1914                      u_int8_t tag_action,
1915                      u_int16_t element_address,
1916                      u_int8_t send_action_code,
1917                      struct scsi_send_volume_tag_parameters *parameters,
1918                      u_int8_t sense_len, u_int32_t timeout)
1919 {
1920         struct scsi_send_volume_tag *scsi_cmd;
1921
1922         scsi_cmd = (struct scsi_send_volume_tag *) &csio->cdb_io.cdb_bytes;
1923         bzero(scsi_cmd, sizeof(*scsi_cmd));
1924
1925         scsi_cmd->opcode = SEND_VOLUME_TAG;
1926         scsi_ulto2b(element_address, scsi_cmd->ea);
1927         scsi_cmd->sac = send_action_code;
1928         scsi_ulto2b(sizeof(*parameters), scsi_cmd->pll);
1929
1930         cam_fill_csio(csio,
1931                       retries,
1932                       cbfcnp,
1933                       /*flags*/ CAM_DIR_OUT,
1934                       tag_action,
1935                       /* data_ptr */ (u_int8_t *) parameters,
1936                       sizeof(*parameters),
1937                       sense_len,
1938                       sizeof(*scsi_cmd),
1939                       timeout);
1940 }