sys/cam/scsi/scsi_ch.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD AND BSD-4-Clause
   3  *
   4  * Copyright (c) 1997 Justin T. Gibbs.
   5  * Copyright (c) 1997, 1998, 1999 Kenneth D. Merry.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions, and the following disclaimer,
  13  *    without modification, immediately at the beginning of the file.
  14  * 2. The name of the author may not be used to endorse or promote products
  15  *    derived from this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
  21  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  29
  30 /*
  31  * Derived from the NetBSD SCSI changer driver.
  32  *
  33  *      $NetBSD: ch.c,v 1.32 1998/01/12 09:49:12 thorpej Exp $
  34  *
  35  */
  36 /*-
  37  * Copyright (c) 1996, 1997 Jason R. Thorpe <thorpej@and.com>
  38  * All rights reserved.
  39  *
  40  * Partially based on an autochanger driver written by Stefan Grefen
  41  * and on an autochanger driver written by the Systems Programming Group
  42  * at the University of Utah Computer Science Department.
  43  *
  44  * Redistribution and use in source and binary forms, with or without
  45  * modification, are permitted provided that the following conditions
  46  * are met:
  47  * 1. Redistributions of source code must retain the above copyright
  48  *    notice, this list of conditions and the following disclaimer.
  49  * 2. Redistributions in binary form must reproduce the above copyright
  50  *    notice, this list of conditions and the following disclaimer in the
  51  *    documentation and/or other materials provided with the distribution.
  52  * 3. All advertising materials mentioning features or use of this software
  53  *    must display the following acknowledgements:
  54  *      This product includes software developed by Jason R. Thorpe
  55  *      for And Communications, http://www.and.com/
  56  * 4. The name of the author may not be used to endorse or promote products
  57  *    derived from this software without specific prior written permission.
  58  *
  59  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  60  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  61  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  62  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  63  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
  64  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  65  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  66  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  67  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  68  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  69  * SUCH DAMAGE.
  70  */
  71
  72 #include <sys/cdefs.h>
  73 __FBSDID("$FreeBSD$");
  74
  75 #include <sys/param.h>
  76 #include <sys/queue.h>
  77 #include <sys/systm.h>
  78 #include <sys/kernel.h>
  79 #include <sys/types.h>
  80 #include <sys/malloc.h>
  81 #include <sys/fcntl.h>
  82 #include <sys/conf.h>
  83 #include <sys/chio.h>
  84 #include <sys/errno.h>
  85 #include <sys/devicestat.h>
  86
  87 #include <cam/cam.h>
  88 #include <cam/cam_ccb.h>
  89 #include <cam/cam_periph.h>
  90 #include <cam/cam_xpt_periph.h>
  91 #include <cam/cam_debug.h>
  92
  93 #include <cam/scsi/scsi_all.h>
  94 #include <cam/scsi/scsi_message.h>
  95 #include <cam/scsi/scsi_ch.h>
  96
  97 /*
  98  * Timeout definitions for various changer related commands.  They may
  99  * be too short for some devices (especially the timeout for INITIALIZE
 100  * ELEMENT STATUS).
 101  */
 102
 103 static const u_int32_t  CH_TIMEOUT_MODE_SENSE                = 6000;
 104 static const u_int32_t  CH_TIMEOUT_MOVE_MEDIUM               = 15 * 60 * 1000;
 105 static const u_int32_t  CH_TIMEOUT_EXCHANGE_MEDIUM           = 15 * 60 * 1000;
 106 static const u_int32_t  CH_TIMEOUT_POSITION_TO_ELEMENT       = 15 * 60 * 1000;
 107 static const u_int32_t  CH_TIMEOUT_READ_ELEMENT_STATUS       = 5 * 60 * 1000;
 108 static const u_int32_t  CH_TIMEOUT_SEND_VOLTAG               = 10000;
 109 static const u_int32_t  CH_TIMEOUT_INITIALIZE_ELEMENT_STATUS = 500000;
 110
 111 typedef enum {
 112         CH_FLAG_INVALID         = 0x001
 113 } ch_flags;
 114
 115 typedef enum {
 116         CH_STATE_PROBE,
 117         CH_STATE_NORMAL
 118 } ch_state;
 119
 120 typedef enum {
 121         CH_CCB_PROBE
 122 } ch_ccb_types;
 123
 124 typedef enum {
 125         CH_Q_NONE       = 0x00,
 126         CH_Q_NO_DBD     = 0x01,
 127         CH_Q_NO_DVCID   = 0x02
 128 } ch_quirks;
 129
 130 #define CH_Q_BIT_STRING \
 131         "\020"          \
 132         "\001NO_DBD"    \
 133         "\002NO_DVCID"
 134
 135 #define ccb_state       ppriv_field0
 136 #define ccb_bp          ppriv_ptr1
 137
 138 struct scsi_mode_sense_data {
 139         struct scsi_mode_header_6 header;
 140         struct scsi_mode_blk_desc blk_desc;
 141         union {
 142                 struct page_element_address_assignment ea;
 143                 struct page_transport_geometry_parameters tg;
 144                 struct page_device_capabilities cap;
 145         } pages;
 146 };
 147
 148 struct ch_softc {
 149         ch_flags        flags;
 150         ch_state        state;
 151         ch_quirks       quirks;
 152         union ccb       saved_ccb;
 153         struct devstat  *device_stats;
 154         struct cdev     *dev;
 155         int             open_count;
 156
 157         int             sc_picker;      /* current picker */
 158
 159         /*
 160          * The following information is obtained from the
 161          * element address assignment page.
 162          */
 163         int             sc_firsts[CHET_MAX + 1];        /* firsts */
 164         int             sc_counts[CHET_MAX + 1];        /* counts */
 165
 166         /*
 167          * The following mask defines the legal combinations
 168          * of elements for the MOVE MEDIUM command.
 169          */
 170         u_int8_t        sc_movemask[CHET_MAX + 1];
 171
 172         /*
 173          * As above, but for EXCHANGE MEDIUM.
 174          */
 175         u_int8_t        sc_exchangemask[CHET_MAX + 1];
 176
 177         /*
 178          * Quirks; see below.  XXX KDM not implemented yet
 179          */
 180         int             sc_settledelay; /* delay for settle */
 181 };
 182
 183 static  d_open_t        chopen;
 184 static  d_close_t       chclose;
 185 static  d_ioctl_t       chioctl;
 186 static  periph_init_t   chinit;
 187 static  periph_ctor_t   chregister;
 188 static  periph_oninv_t  choninvalidate;
 189 static  periph_dtor_t   chcleanup;
 190 static  periph_start_t  chstart;
 191 static  void            chasync(void *callback_arg, u_int32_t code,
 192                                 struct cam_path *path, void *arg);
 193 static  void            chdone(struct cam_periph *periph,
 194                                union ccb *done_ccb);
 195 static  int             cherror(union ccb *ccb, u_int32_t cam_flags,
 196                                 u_int32_t sense_flags);
 197 static  int             chmove(struct cam_periph *periph,
 198                                struct changer_move *cm);
 199 static  int             chexchange(struct cam_periph *periph,
 200                                    struct changer_exchange *ce);
 201 static  int             chposition(struct cam_periph *periph,
 202                                    struct changer_position *cp);
 203 static  int             chgetelemstatus(struct cam_periph *periph,
 204                                 int scsi_version, u_long cmd,
 205                                 struct changer_element_status_request *csr);
 206 static  int             chsetvoltag(struct cam_periph *periph,
 207                                     struct changer_set_voltag_request *csvr);
 208 static  int             chielem(struct cam_periph *periph,
 209                                 unsigned int timeout);
 210 static  int             chgetparams(struct cam_periph *periph);
 211 static  int             chscsiversion(struct cam_periph *periph);
 212
 213 static struct periph_driver chdriver =
 214 {
 215         chinit, "ch",
 216         TAILQ_HEAD_INITIALIZER(chdriver.units), /* generation */ 0
 217 };
 218
 219 PERIPHDRIVER_DECLARE(ch, chdriver);
 220
 221 static struct cdevsw ch_cdevsw = {
 222         .d_version =    D_VERSION,
 223         .d_flags =      D_TRACKCLOSE,
 224         .d_open =       chopen,
 225         .d_close =      chclose,
 226         .d_ioctl =      chioctl,
 227         .d_name =       "ch",
 228 };
 229
 230 static MALLOC_DEFINE(M_SCSICH, "scsi_ch", "scsi_ch buffers");
 231
 232 static void
 233 chinit(void)
 234 {
 235         cam_status status;
 236
 237         /*
 238          * Install a global async callback.  This callback will
 239          * receive async callbacks like "new device found".
 240          */
 241         status = xpt_register_async(AC_FOUND_DEVICE, chasync, NULL, NULL);
 242
 243         if (status != CAM_REQ_CMP) {
 244                 printf("ch: Failed to attach master async callback "
 245                        "due to status 0x%x!\n", status);
 246         }
 247 }
 248
 249 static void
 250 chdevgonecb(void *arg)
 251 {
 252         struct ch_softc   *softc;
 253         struct cam_periph *periph;
 254         struct mtx *mtx;
 255         int i;
 256
 257         periph = (struct cam_periph *)arg;
 258         mtx = cam_periph_mtx(periph);
 259         mtx_lock(mtx);
 260
 261         softc = (struct ch_softc *)periph->softc;
 262         KASSERT(softc->open_count >= 0, ("Negative open count %d",
 263                 softc->open_count));
 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 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(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                 if (SID_QUAL(&cgd->inq_data) != SID_QUAL_LU_CONNECTED)
 343                         break;
 344                 if (SID_TYPE(&cgd->inq_data)!= T_CHANGER)
 345                         break;
 346
 347                 /*
 348                  * Allocate a peripheral instance for
 349                  * this device and start the probe
 350                  * process.
 351                  */
 352                 status = cam_periph_alloc(chregister, choninvalidate,
 353                                           chcleanup, chstart, "ch",
 354                                           CAM_PERIPH_BIO, path,
 355                                           chasync, AC_FOUND_DEVICE, cgd);
 356
 357                 if (status != CAM_REQ_CMP
 358                  && status != CAM_REQ_INPROG)
 359                         printf("chasync: Unable to probe new device "
 360                                "due to status 0x%x\n", status);
 361
 362                 break;
 363
 364         }
 365         default:
 366                 cam_periph_async(periph, code, path, arg);
 367                 break;
 368         }
 369 }
 370
 371 static cam_status
 372 chregister(struct cam_periph *periph, void *arg)
 373 {
 374         struct ch_softc *softc;
 375         struct ccb_getdev *cgd;
 376         struct ccb_pathinq cpi;
 377         struct make_dev_args args;
 378         int error;
 379
 380         cgd = (struct ccb_getdev *)arg;
 381         if (cgd == NULL) {
 382                 printf("chregister: no getdev CCB, can't register device\n");
 383                 return(CAM_REQ_CMP_ERR);
 384         }
 385
 386         softc = (struct ch_softc *)malloc(sizeof(*softc),M_DEVBUF,M_NOWAIT);
 387
 388         if (softc == NULL) {
 389                 printf("chregister: Unable to probe new device. "
 390                        "Unable to allocate softc\n");
 391                 return(CAM_REQ_CMP_ERR);
 392         }
 393
 394         bzero(softc, sizeof(*softc));
 395         softc->state = CH_STATE_PROBE;
 396         periph->softc = softc;
 397         softc->quirks = CH_Q_NONE;
 398
 399         /*
 400          * The DVCID and CURDATA bits were not introduced until the SMC
 401          * spec.  If this device claims SCSI-2 or earlier support, then it
 402          * very likely does not support these bits.
 403          */
 404         if (cgd->inq_data.version <= SCSI_REV_2)
 405                 softc->quirks |= CH_Q_NO_DVCID;
 406
 407         xpt_path_inq(&cpi, periph->path);
 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         make_dev_args_init(&args);
 436         args.mda_devsw = &ch_cdevsw;
 437         args.mda_unit = periph->unit_number;
 438         args.mda_uid = UID_ROOT;
 439         args.mda_gid = GID_OPERATOR;
 440         args.mda_mode = 0600;
 441         args.mda_si_drv1 = periph;
 442         error = make_dev_s(&args, &softc->dev, "%s%d", periph->periph_name,
 443             periph->unit_number);
 444         cam_periph_lock(periph);
 445         if (error != 0) {
 446                 cam_periph_release_locked(periph);
 447                 return (CAM_REQ_CMP_ERR);
 448         }
 449
 450         /*
 451          * Add an async callback so that we get
 452          * notified if this device goes away.
 453          */
 454         xpt_register_async(AC_LOST_DEVICE, chasync, periph, periph->path);
 455
 456         /*
 457          * Lock this periph until we are setup.
 458          * This first call can't block
 459          */
 460         (void)cam_periph_hold(periph, PRIBIO);
 461         xpt_schedule(periph, CAM_PRIORITY_DEV);
 462
 463         return(CAM_REQ_CMP);
 464 }
 465
 466 static int
 467 chopen(struct cdev *dev, int flags, int fmt, struct thread *td)
 468 {
 469         struct cam_periph *periph;
 470         struct ch_softc *softc;
 471         int error;
 472
 473         periph = (struct cam_periph *)dev->si_drv1;
 474         if (cam_periph_acquire(periph) != CAM_REQ_CMP)
 475                 return (ENXIO);
 476
 477         softc = (struct ch_softc *)periph->softc;
 478
 479         cam_periph_lock(periph);
 480
 481         if (softc->flags & CH_FLAG_INVALID) {
 482                 cam_periph_release_locked(periph);
 483                 cam_periph_unlock(periph);
 484                 return(ENXIO);
 485         }
 486
 487         if ((error = cam_periph_hold(periph, PRIBIO | PCATCH)) != 0) {
 488                 cam_periph_unlock(periph);
 489                 cam_periph_release(periph);
 490                 return (error);
 491         }
 492
 493         /*
 494          * Load information about this changer device into the softc.
 495          */
 496         if ((error = chgetparams(periph)) != 0) {
 497                 cam_periph_unhold(periph);
 498                 cam_periph_release_locked(periph);
 499                 cam_periph_unlock(periph);
 500                 return(error);
 501         }
 502
 503         cam_periph_unhold(periph);
 504
 505         softc->open_count++;
 506
 507         cam_periph_unlock(periph);
 508
 509         return(error);
 510 }
 511
 512 static int
 513 chclose(struct cdev *dev, int flag, int fmt, struct thread *td)
 514 {
 515         struct  cam_periph *periph;
 516         struct  ch_softc *softc;
 517         struct mtx *mtx;
 518
 519         periph = (struct cam_periph *)dev->si_drv1;
 520         mtx = cam_periph_mtx(periph);
 521         mtx_lock(mtx);
 522
 523         softc = (struct ch_softc *)periph->softc;
 524         softc->open_count--;
 525
 526         cam_periph_release_locked(periph);
 527
 528         /*
 529          * We reference the lock directly here, instead of using
 530          * cam_periph_unlock().  The reason is that the call to
 531          * cam_periph_release_locked() above could result in the periph
 532          * getting freed.  If that is the case, dereferencing the periph
 533          * with a cam_periph_unlock() call would cause a page fault.
 534          *
 535          * cam_periph_release() avoids this problem using the same method,
 536          * but we're manually acquiring and dropping the lock here to
 537          * protect the open count and avoid another lock acquisition and
 538          * release.
 539          */
 540         mtx_unlock(mtx);
 541
 542         return(0);
 543 }
 544
 545 static void
 546 chstart(struct cam_periph *periph, union ccb *start_ccb)
 547 {
 548         struct ch_softc *softc;
 549
 550         softc = (struct ch_softc *)periph->softc;
 551
 552         switch (softc->state) {
 553         case CH_STATE_NORMAL:
 554         {
 555                 xpt_release_ccb(start_ccb);
 556                 break;
 557         }
 558         case CH_STATE_PROBE:
 559         {
 560                 int mode_buffer_len;
 561                 void *mode_buffer;
 562
 563                 /*
 564                  * Include the block descriptor when calculating the mode
 565                  * buffer length,
 566                  */
 567                 mode_buffer_len = sizeof(struct scsi_mode_header_6) +
 568                                   sizeof(struct scsi_mode_blk_desc) +
 569                                  sizeof(struct page_element_address_assignment);
 570
 571                 mode_buffer = malloc(mode_buffer_len, M_SCSICH, M_NOWAIT);
 572
 573                 if (mode_buffer == NULL) {
 574                         printf("chstart: couldn't malloc mode sense data\n");
 575                         break;
 576                 }
 577                 bzero(mode_buffer, mode_buffer_len);
 578
 579                 /*
 580                  * Get the element address assignment page.
 581                  */
 582                 scsi_mode_sense(&start_ccb->csio,
 583                                 /* retries */ 1,
 584                                 /* cbfcnp */ chdone,
 585                                 /* tag_action */ MSG_SIMPLE_Q_TAG,
 586                                 /* dbd */ (softc->quirks & CH_Q_NO_DBD) ?
 587                                         FALSE : TRUE,
 588                                 /* pc */ SMS_PAGE_CTRL_CURRENT,
 589                                 /* page */ CH_ELEMENT_ADDR_ASSIGN_PAGE,
 590                                 /* param_buf */ (u_int8_t *)mode_buffer,
 591                                 /* param_len */ mode_buffer_len,
 592                                 /* sense_len */ SSD_FULL_SIZE,
 593                                 /* timeout */ CH_TIMEOUT_MODE_SENSE);
 594
 595                 start_ccb->ccb_h.ccb_bp = NULL;
 596                 start_ccb->ccb_h.ccb_state = CH_CCB_PROBE;
 597                 xpt_action(start_ccb);
 598                 break;
 599         }
 600         }
 601 }
 602
 603 static void
 604 chdone(struct cam_periph *periph, union ccb *done_ccb)
 605 {
 606         struct ch_softc *softc;
 607         struct ccb_scsiio *csio;
 608
 609         softc = (struct ch_softc *)periph->softc;
 610         csio = &done_ccb->csio;
 611
 612         switch(done_ccb->ccb_h.ccb_state) {
 613         case CH_CCB_PROBE:
 614         {
 615                 struct scsi_mode_header_6 *mode_header;
 616                 struct page_element_address_assignment *ea;
 617                 char announce_buf[80];
 618
 619
 620                 mode_header = (struct scsi_mode_header_6 *)csio->data_ptr;
 621
 622                 ea = (struct page_element_address_assignment *)
 623                         find_mode_page_6(mode_header);
 624
 625                 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP){
 626
 627                         softc->sc_firsts[CHET_MT] = scsi_2btoul(ea->mtea);
 628                         softc->sc_counts[CHET_MT] = scsi_2btoul(ea->nmte);
 629                         softc->sc_firsts[CHET_ST] = scsi_2btoul(ea->fsea);
 630                         softc->sc_counts[CHET_ST] = scsi_2btoul(ea->nse);
 631                         softc->sc_firsts[CHET_IE] = scsi_2btoul(ea->fieea);
 632                         softc->sc_counts[CHET_IE] = scsi_2btoul(ea->niee);
 633                         softc->sc_firsts[CHET_DT] = scsi_2btoul(ea->fdtea);
 634                         softc->sc_counts[CHET_DT] = scsi_2btoul(ea->ndte);
 635                         softc->sc_picker = softc->sc_firsts[CHET_MT];
 636
 637 #define PLURAL(c)       (c) == 1 ? "" : "s"
 638                         snprintf(announce_buf, sizeof(announce_buf),
 639                                 "%d slot%s, %d drive%s, "
 640                                 "%d picker%s, %d portal%s",
 641                                 softc->sc_counts[CHET_ST],
 642                                 PLURAL(softc->sc_counts[CHET_ST]),
 643                                 softc->sc_counts[CHET_DT],
 644                                 PLURAL(softc->sc_counts[CHET_DT]),
 645                                 softc->sc_counts[CHET_MT],
 646                                 PLURAL(softc->sc_counts[CHET_MT]),
 647                                 softc->sc_counts[CHET_IE],
 648                                 PLURAL(softc->sc_counts[CHET_IE]));
 649 #undef PLURAL
 650                         if (announce_buf[0] != '\0') {
 651                                 xpt_announce_periph(periph, announce_buf);
 652                                 xpt_announce_quirks(periph, softc->quirks,
 653                                     CH_Q_BIT_STRING);
 654                         }
 655                 } else {
 656                         int error;
 657
 658                         error = cherror(done_ccb, CAM_RETRY_SELTO,
 659                                         SF_RETRY_UA | SF_NO_PRINT);
 660                         /*
 661                          * Retry any UNIT ATTENTION type errors.  They
 662                          * are expected at boot.
 663                          */
 664                         if (error == ERESTART) {
 665                                 /*
 666                                  * A retry was scheduled, so
 667                                  * just return.
 668                                  */
 669                                 return;
 670                         } else if (error != 0) {
 671                                 struct scsi_mode_sense_6 *sms;
 672                                 int frozen, retry_scheduled;
 673
 674                                 sms = (struct scsi_mode_sense_6 *)
 675                                         done_ccb->csio.cdb_io.cdb_bytes;
 676                                 frozen = (done_ccb->ccb_h.status &
 677                                     CAM_DEV_QFRZN) != 0;
 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) != 0 &&
 689                                     (periph->flags & CAM_PERIPH_INVALID) == 0) {
 690                                         sms->byte2 &= ~SMS_DBD;
 691                                         xpt_action(done_ccb);
 692                                         softc->quirks |= CH_Q_NO_DBD;
 693                                         retry_scheduled = 1;
 694                                 } else
 695                                         retry_scheduled = 0;
 696
 697                                 /* Don't wedge this device's queue */
 698                                 if (frozen)
 699                                         cam_release_devq(done_ccb->ccb_h.path,
 700                                                  /*relsim_flags*/0,
 701                                                  /*reduction*/0,
 702                                                  /*timeout*/0,
 703                                                  /*getcount_only*/0);
 704
 705                                 if (retry_scheduled)
 706                                         return;
 707
 708                                 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK)
 709                                     == CAM_SCSI_STATUS_ERROR)
 710                                         scsi_sense_print(&done_ccb->csio);
 711                                 else {
 712                                         xpt_print(periph->path,
 713                                             "got CAM status %#x\n",
 714                                             done_ccb->ccb_h.status);
 715                                 }
 716                                 xpt_print(periph->path, "fatal error, failed "
 717                                     "to attach to device\n");
 718
 719                                 cam_periph_invalidate(periph);
 720
 721                         }
 722                 }
 723                 softc->state = CH_STATE_NORMAL;
 724                 free(mode_header, M_SCSICH);
 725                 /*
 726                  * Since our peripheral may be invalidated by an error
 727                  * above or an external event, we must release our CCB
 728                  * before releasing the probe lock on the peripheral.
 729                  * The peripheral will only go away once the last lock
 730                  * is removed, and we need it around for the CCB release
 731                  * operation.
 732                  */
 733                 xpt_release_ccb(done_ccb);
 734                 cam_periph_unhold(periph);
 735                 return;
 736         }
 737         default:
 738                 break;
 739         }
 740         xpt_release_ccb(done_ccb);
 741 }
 742
 743 static int
 744 cherror(union ccb *ccb, u_int32_t cam_flags, u_int32_t sense_flags)
 745 {
 746         struct ch_softc *softc;
 747         struct cam_periph *periph;
 748
 749         periph = xpt_path_periph(ccb->ccb_h.path);
 750         softc = (struct ch_softc *)periph->softc;
 751
 752         return (cam_periph_error(ccb, cam_flags, sense_flags));
 753 }
 754
 755 static int
 756 chioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
 757 {
 758         struct cam_periph *periph;
 759         struct ch_softc *softc;
 760         int error;
 761
 762         periph = (struct cam_periph *)dev->si_drv1;
 763         cam_periph_lock(periph);
 764         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("entering chioctl\n"));
 765
 766         softc = (struct ch_softc *)periph->softc;
 767
 768         error = 0;
 769
 770         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE,
 771                   ("trying to do ioctl %#lx\n", cmd));
 772
 773         /*
 774          * If this command can change the device's state, we must
 775          * have the device open for writing.
 776          */
 777         switch (cmd) {
 778         case CHIOGPICKER:
 779         case CHIOGPARAMS:
 780         case OCHIOGSTATUS:
 781         case CHIOGSTATUS:
 782                 break;
 783
 784         default:
 785                 if ((flag & FWRITE) == 0) {
 786                         cam_periph_unlock(periph);
 787                         return (EBADF);
 788                 }
 789         }
 790
 791         switch (cmd) {
 792         case CHIOMOVE:
 793                 error = chmove(periph, (struct changer_move *)addr);
 794                 break;
 795
 796         case CHIOEXCHANGE:
 797                 error = chexchange(periph, (struct changer_exchange *)addr);
 798                 break;
 799
 800         case CHIOPOSITION:
 801                 error = chposition(periph, (struct changer_position *)addr);
 802                 break;
 803
 804         case CHIOGPICKER:
 805                 *(int *)addr = softc->sc_picker - softc->sc_firsts[CHET_MT];
 806                 break;
 807
 808         case CHIOSPICKER:
 809         {
 810                 int new_picker = *(int *)addr;
 811
 812                 if (new_picker > (softc->sc_counts[CHET_MT] - 1)) {
 813                         error = EINVAL;
 814                         break;
 815                 }
 816                 softc->sc_picker = softc->sc_firsts[CHET_MT] + new_picker;
 817                 break;
 818         }
 819         case CHIOGPARAMS:
 820         {
 821                 struct changer_params *cp = (struct changer_params *)addr;
 822
 823                 cp->cp_npickers = softc->sc_counts[CHET_MT];
 824                 cp->cp_nslots = softc->sc_counts[CHET_ST];
 825                 cp->cp_nportals = softc->sc_counts[CHET_IE];
 826                 cp->cp_ndrives = softc->sc_counts[CHET_DT];
 827                 break;
 828         }
 829         case CHIOIELEM:
 830                 error = chielem(periph, *(unsigned int *)addr);
 831                 break;
 832
 833         case OCHIOGSTATUS:
 834         {
 835                 error = chgetelemstatus(periph, SCSI_REV_2, cmd,
 836                     (struct changer_element_status_request *)addr);
 837                 break;
 838         }
 839
 840         case CHIOGSTATUS:
 841         {
 842                 int scsi_version;
 843
 844                 scsi_version = chscsiversion(periph);
 845                 if (scsi_version >= SCSI_REV_0) {
 846                         error = chgetelemstatus(periph, scsi_version, cmd,
 847                             (struct changer_element_status_request *)addr);
 848                 }
 849                 else { /* unable to determine the SCSI version */
 850                         cam_periph_unlock(periph);
 851                         return (ENXIO);
 852                 }
 853                 break;
 854         }
 855
 856         case CHIOSETVOLTAG:
 857         {
 858                 error = chsetvoltag(periph,
 859                                     (struct changer_set_voltag_request *) addr);
 860                 break;
 861         }
 862
 863         /* Implement prevent/allow? */
 864
 865         default:
 866                 error = cam_periph_ioctl(periph, cmd, addr, cherror);
 867                 break;
 868         }
 869
 870         cam_periph_unlock(periph);
 871         return (error);
 872 }
 873
 874 static int
 875 chmove(struct cam_periph *periph, struct changer_move *cm)
 876 {
 877         struct ch_softc *softc;
 878         u_int16_t fromelem, toelem;
 879         union ccb *ccb;
 880         int error;
 881
 882         error = 0;
 883         softc = (struct ch_softc *)periph->softc;
 884
 885         /*
 886          * Check arguments.
 887          */
 888         if ((cm->cm_fromtype > CHET_DT) || (cm->cm_totype > CHET_DT))
 889                 return (EINVAL);
 890         if ((cm->cm_fromunit > (softc->sc_counts[cm->cm_fromtype] - 1)) ||
 891             (cm->cm_tounit > (softc->sc_counts[cm->cm_totype] - 1)))
 892                 return (ENODEV);
 893
 894         /*
 895          * Check the request against the changer's capabilities.
 896          */
 897         if ((softc->sc_movemask[cm->cm_fromtype] & (1 << cm->cm_totype)) == 0)
 898                 return (ENODEV);
 899
 900         /*
 901          * Calculate the source and destination elements.
 902          */
 903         fromelem = softc->sc_firsts[cm->cm_fromtype] + cm->cm_fromunit;
 904         toelem = softc->sc_firsts[cm->cm_totype] + cm->cm_tounit;
 905
 906         ccb = cam_periph_getccb(periph, CAM_PRIORITY_NORMAL);
 907
 908         scsi_move_medium(&ccb->csio,
 909                          /* retries */ 1,
 910                          /* cbfcnp */ chdone,
 911                          /* tag_action */ MSG_SIMPLE_Q_TAG,
 912                          /* tea */ softc->sc_picker,
 913                          /* src */ fromelem,
 914                          /* dst */ toelem,
 915                          /* invert */ (cm->cm_flags & CM_INVERT) ? TRUE : FALSE,
 916                          /* sense_len */ SSD_FULL_SIZE,
 917                          /* timeout */ CH_TIMEOUT_MOVE_MEDIUM);
 918
 919         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/CAM_RETRY_SELTO,
 920                                   /*sense_flags*/ SF_RETRY_UA,
 921                                   softc->device_stats);
 922
 923         xpt_release_ccb(ccb);
 924
 925         return(error);
 926 }
 927
 928 static int
 929 chexchange(struct cam_periph *periph, struct changer_exchange *ce)
 930 {
 931         struct ch_softc *softc;
 932         u_int16_t src, dst1, dst2;
 933         union ccb *ccb;
 934         int error;
 935
 936         error = 0;
 937         softc = (struct ch_softc *)periph->softc;
 938         /*
 939          * Check arguments.
 940          */
 941         if ((ce->ce_srctype > CHET_DT) || (ce->ce_fdsttype > CHET_DT) ||
 942             (ce->ce_sdsttype > CHET_DT))
 943                 return (EINVAL);
 944         if ((ce->ce_srcunit > (softc->sc_counts[ce->ce_srctype] - 1)) ||
 945             (ce->ce_fdstunit > (softc->sc_counts[ce->ce_fdsttype] - 1)) ||
 946             (ce->ce_sdstunit > (softc->sc_counts[ce->ce_sdsttype] - 1)))
 947                 return (ENODEV);
 948
 949         /*
 950          * Check the request against the changer's capabilities.
 951          */
 952         if (((softc->sc_exchangemask[ce->ce_srctype] &
 953              (1 << ce->ce_fdsttype)) == 0) ||
 954             ((softc->sc_exchangemask[ce->ce_fdsttype] &
 955              (1 << ce->ce_sdsttype)) == 0))
 956                 return (ENODEV);
 957
 958         /*
 959          * Calculate the source and destination elements.
 960          */
 961         src = softc->sc_firsts[ce->ce_srctype] + ce->ce_srcunit;
 962         dst1 = softc->sc_firsts[ce->ce_fdsttype] + ce->ce_fdstunit;
 963         dst2 = softc->sc_firsts[ce->ce_sdsttype] + ce->ce_sdstunit;
 964
 965         ccb = cam_periph_getccb(periph, CAM_PRIORITY_NORMAL);
 966
 967         scsi_exchange_medium(&ccb->csio,
 968                              /* retries */ 1,
 969                              /* cbfcnp */ chdone,
 970                              /* tag_action */ MSG_SIMPLE_Q_TAG,
 971                              /* tea */ softc->sc_picker,
 972                              /* src */ src,
 973                              /* dst1 */ dst1,
 974                              /* dst2 */ dst2,
 975                              /* invert1 */ (ce->ce_flags & CE_INVERT1) ?
 976                                            TRUE : FALSE,
 977                              /* invert2 */ (ce->ce_flags & CE_INVERT2) ?
 978                                            TRUE : FALSE,
 979                              /* sense_len */ SSD_FULL_SIZE,
 980                              /* timeout */ CH_TIMEOUT_EXCHANGE_MEDIUM);
 981
 982         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/CAM_RETRY_SELTO,
 983                                   /*sense_flags*/ SF_RETRY_UA,
 984                                   softc->device_stats);
 985
 986         xpt_release_ccb(ccb);
 987
 988         return(error);
 989 }
 990
 991 static int
 992 chposition(struct cam_periph *periph, struct changer_position *cp)
 993 {
 994         struct ch_softc *softc;
 995         u_int16_t dst;
 996         union ccb *ccb;
 997         int error;
 998
 999         error = 0;
1000         softc = (struct ch_softc *)periph->softc;
1001
1002         /*
1003          * Check arguments.
1004          */
1005         if (cp->cp_type > CHET_DT)
1006                 return (EINVAL);
1007         if (cp->cp_unit > (softc->sc_counts[cp->cp_type] - 1))
1008                 return (ENODEV);
1009
1010         /*
1011          * Calculate the destination element.
1012          */
1013         dst = softc->sc_firsts[cp->cp_type] + cp->cp_unit;
1014
1015         ccb = cam_periph_getccb(periph, CAM_PRIORITY_NORMAL);
1016
1017         scsi_position_to_element(&ccb->csio,
1018                                  /* retries */ 1,
1019                                  /* cbfcnp */ chdone,
1020                                  /* tag_action */ MSG_SIMPLE_Q_TAG,
1021                                  /* tea */ softc->sc_picker,
1022                                  /* dst */ dst,
1023                                  /* invert */ (cp->cp_flags & CP_INVERT) ?
1024                                               TRUE : FALSE,
1025                                  /* sense_len */ SSD_FULL_SIZE,
1026                                  /* timeout */ CH_TIMEOUT_POSITION_TO_ELEMENT);
1027
1028         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
1029                                   /*sense_flags*/ SF_RETRY_UA,
1030                                   softc->device_stats);
1031
1032         xpt_release_ccb(ccb);
1033
1034         return(error);
1035 }
1036
1037 /*
1038  * Copy a volume tag to a volume_tag struct, converting SCSI byte order
1039  * to host native byte order in the volume serial number.  The volume
1040  * label as returned by the changer is transferred to user mode as
1041  * nul-terminated string.  Volume labels are truncated at the first
1042  * space, as suggested by SCSI-2.
1043  */
1044 static  void
1045 copy_voltag(struct changer_voltag *uvoltag, struct volume_tag *voltag)
1046 {
1047         int i;
1048         for (i=0; i<CH_VOLTAG_MAXLEN; i++) {
1049                 char c = voltag->vif[i];
1050                 if (c && c != ' ')
1051                         uvoltag->cv_volid[i] = c;
1052                 else
1053                         break;
1054         }
1055         uvoltag->cv_serial = scsi_2btoul(voltag->vsn);
1056 }
1057
1058 /*
1059  * Copy an element status descriptor to a user-mode
1060  * changer_element_status structure.
1061  */
1062 static void
1063 copy_element_status(struct ch_softc *softc,
1064                     u_int16_t flags,
1065                     struct read_element_status_descriptor *desc,
1066                     struct changer_element_status *ces,
1067                     int scsi_version)
1068 {
1069         u_int16_t eaddr = scsi_2btoul(desc->eaddr);
1070         u_int16_t et;
1071         struct volume_tag *pvol_tag = NULL, *avol_tag = NULL;
1072         struct read_element_status_device_id *devid = NULL;
1073
1074         ces->ces_int_addr = eaddr;
1075         /* set up logical address in element status */
1076         for (et = CHET_MT; et <= CHET_DT; et++) {
1077                 if ((softc->sc_firsts[et] <= eaddr)
1078                     && ((softc->sc_firsts[et] + softc->sc_counts[et])
1079                         > eaddr)) {
1080                         ces->ces_addr = eaddr - softc->sc_firsts[et];
1081                         ces->ces_type = et;
1082                         break;
1083                 }
1084         }
1085
1086         ces->ces_flags = desc->flags1;
1087
1088         ces->ces_sensecode = desc->sense_code;
1089         ces->ces_sensequal = desc->sense_qual;
1090
1091         if (desc->flags2 & READ_ELEMENT_STATUS_INVERT)
1092                 ces->ces_flags |= CES_INVERT;
1093
1094         if (desc->flags2 & READ_ELEMENT_STATUS_SVALID) {
1095
1096                 eaddr = scsi_2btoul(desc->ssea);
1097
1098                 /* convert source address to logical format */
1099                 for (et = CHET_MT; et <= CHET_DT; et++) {
1100                         if ((softc->sc_firsts[et] <= eaddr)
1101                             && ((softc->sc_firsts[et] + softc->sc_counts[et])
1102                                 > eaddr)) {
1103                                 ces->ces_source_addr =
1104                                         eaddr - softc->sc_firsts[et];
1105                                 ces->ces_source_type = et;
1106                                 ces->ces_flags |= CES_SOURCE_VALID;
1107                                 break;
1108                         }
1109                 }
1110
1111                 if (!(ces->ces_flags & CES_SOURCE_VALID))
1112                         printf("ch: warning: could not map element source "
1113                                "address %ud to a valid element type\n",
1114                                eaddr);
1115         }
1116
1117         /*
1118          * pvoltag and avoltag are common between SCSI-2 and later versions
1119          */
1120         if (flags & READ_ELEMENT_STATUS_PVOLTAG)
1121                 pvol_tag = &desc->voltag_devid.pvoltag;
1122         if (flags & READ_ELEMENT_STATUS_AVOLTAG)
1123                 avol_tag = (flags & READ_ELEMENT_STATUS_PVOLTAG) ?
1124                     &desc->voltag_devid.voltag[1] :&desc->voltag_devid.pvoltag;
1125         /*
1126          * For SCSI-3 and later, element status can carry designator and
1127          * other information.
1128          */
1129         if (scsi_version >= SCSI_REV_SPC) {
1130                 if ((flags & READ_ELEMENT_STATUS_PVOLTAG) ^
1131                     (flags & READ_ELEMENT_STATUS_AVOLTAG))
1132                         devid = &desc->voltag_devid.pvol_and_devid.devid;
1133                 else if (!(flags & READ_ELEMENT_STATUS_PVOLTAG) &&
1134                          !(flags & READ_ELEMENT_STATUS_AVOLTAG))
1135                         devid = &desc->voltag_devid.devid;
1136                 else /* Have both PVOLTAG and AVOLTAG */
1137                         devid = &desc->voltag_devid.vol_tags_and_devid.devid;
1138         }
1139
1140         if (pvol_tag)
1141                 copy_voltag(&(ces->ces_pvoltag), pvol_tag);
1142         if (avol_tag)
1143                 copy_voltag(&(ces->ces_pvoltag), avol_tag);
1144         if (devid != NULL) {
1145                 if (devid->designator_length > 0) {
1146                         bcopy((void *)devid->designator,
1147                               (void *)ces->ces_designator,
1148                               devid->designator_length);
1149                         ces->ces_designator_length = devid->designator_length;
1150                         /*
1151                          * Make sure we are always NUL terminated.  The
1152                          * This won't matter for the binary code set,
1153                          * since the user will only pay attention to the
1154                          * length field.
1155                          */
1156                         ces->ces_designator[devid->designator_length]= '\0';
1157                 }
1158                 if (devid->piv_assoc_designator_type &
1159                     READ_ELEMENT_STATUS_PIV_SET) {
1160                         ces->ces_flags |= CES_PIV;
1161                         ces->ces_protocol_id =
1162                             READ_ELEMENT_STATUS_PROTOCOL_ID(
1163                             devid->prot_code_set);
1164                 }
1165                 ces->ces_code_set =
1166                     READ_ELEMENT_STATUS_CODE_SET(devid->prot_code_set);
1167                 ces->ces_assoc = READ_ELEMENT_STATUS_ASSOCIATION(
1168                     devid->piv_assoc_designator_type);
1169                 ces->ces_designator_type = READ_ELEMENT_STATUS_DESIGNATOR_TYPE(
1170                     devid->piv_assoc_designator_type);
1171         } else if (scsi_version > SCSI_REV_2) {
1172                 /* SCSI-SPC and No devid, no designator */
1173                 ces->ces_designator_length = 0;
1174                 ces->ces_designator[0] = '\0';
1175                 ces->ces_protocol_id = CES_PROTOCOL_ID_FCP_4;
1176         }
1177
1178         if (scsi_version <= SCSI_REV_2) {
1179                 if (desc->dt_or_obsolete.scsi_2.dt_scsi_flags &
1180                     READ_ELEMENT_STATUS_DT_IDVALID) {
1181                         ces->ces_flags |= CES_SCSIID_VALID;
1182                         ces->ces_scsi_id =
1183                             desc->dt_or_obsolete.scsi_2.dt_scsi_addr;
1184                 }
1185
1186                 if (desc->dt_or_obsolete.scsi_2.dt_scsi_addr &
1187                     READ_ELEMENT_STATUS_DT_LUVALID) {
1188                         ces->ces_flags |= CES_LUN_VALID;
1189                         ces->ces_scsi_lun =
1190                             desc->dt_or_obsolete.scsi_2.dt_scsi_flags &
1191                             READ_ELEMENT_STATUS_DT_LUNMASK;
1192                 }
1193         }
1194 }
1195
1196 static int
1197 chgetelemstatus(struct cam_periph *periph, int scsi_version, u_long cmd,
1198                 struct changer_element_status_request *cesr)
1199 {
1200         struct read_element_status_header *st_hdr;
1201         struct read_element_status_page_header *pg_hdr;
1202         struct read_element_status_descriptor *desc;
1203         caddr_t data = NULL;
1204         size_t size, desclen;
1205         int avail, i, error = 0;
1206         int curdata, dvcid, sense_flags;
1207         int try_no_dvcid = 0;
1208         struct changer_element_status *user_data = NULL;
1209         struct ch_softc *softc;
1210         union ccb *ccb;
1211         int chet = cesr->cesr_element_type;
1212         int want_voltags = (cesr->cesr_flags & CESR_VOLTAGS) ? 1 : 0;
1213
1214         softc = (struct ch_softc *)periph->softc;
1215
1216         /* perform argument checking */
1217
1218         /*
1219          * Perform a range check on the cesr_element_{base,count}
1220          * request argument fields.
1221          */
1222         if ((softc->sc_counts[chet] - cesr->cesr_element_base) <= 0
1223             || (cesr->cesr_element_base + cesr->cesr_element_count)
1224                 > softc->sc_counts[chet])
1225                 return (EINVAL);
1226
1227         /*
1228          * Request one descriptor for the given element type.  This
1229          * is used to determine the size of the descriptor so that
1230          * we can allocate enough storage for all of them.  We assume
1231          * that the first one can fit into 1k.
1232          */
1233         cam_periph_unlock(periph);
1234         data = (caddr_t)malloc(1024, M_DEVBUF, M_WAITOK);
1235
1236         cam_periph_lock(periph);
1237         ccb = cam_periph_getccb(periph, CAM_PRIORITY_NORMAL);
1238
1239         sense_flags = SF_RETRY_UA;
1240         if (softc->quirks & CH_Q_NO_DVCID) {
1241                 dvcid = 0;
1242                 curdata = 0;
1243         } else {
1244                 dvcid = 1;
1245                 curdata = 1;
1246                 /*
1247                  * Don't print anything for an Illegal Request, because
1248                  * these flags can cause some changers to complain.  We'll
1249                  * retry without them if we get an error.
1250                  */
1251                 sense_flags |= SF_QUIET_IR;
1252         }
1253
1254 retry_einval:
1255
1256         scsi_read_element_status(&ccb->csio,
1257                                  /* retries */ 1,
1258                                  /* cbfcnp */ chdone,
1259                                  /* tag_action */ MSG_SIMPLE_Q_TAG,
1260                                  /* voltag */ want_voltags,
1261                                  /* sea */ softc->sc_firsts[chet],
1262                                  /* curdata */ curdata,
1263                                  /* dvcid */ dvcid,
1264                                  /* count */ 1,
1265                                  /* data_ptr */ data,
1266                                  /* dxfer_len */ 1024,
1267                                  /* sense_len */ SSD_FULL_SIZE,
1268                                  /* timeout */ CH_TIMEOUT_READ_ELEMENT_STATUS);
1269
1270         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
1271                                   /*sense_flags*/ sense_flags,
1272                                   softc->device_stats);
1273
1274         /*
1275          * An Illegal Request sense key (only used if there is no asc/ascq)
1276          * or 0x24,0x00 for an ASC/ASCQ both map to EINVAL.  If dvcid or
1277          * curdata are set (we set both or neither), try turning them off
1278          * and see if the command is successful.
1279          */
1280         if ((error == EINVAL)
1281          && (dvcid || curdata))  {
1282                 dvcid = 0;
1283                 curdata = 0;
1284                 error = 0;
1285                 /* At this point we want to report any Illegal Request */
1286                 sense_flags &= ~SF_QUIET_IR;
1287                 try_no_dvcid = 1;
1288                 goto retry_einval;
1289         }
1290
1291         /*
1292          * In this case, we tried a read element status with dvcid and
1293          * curdata set, and it failed.  We retried without those bits, and
1294          * it succeeded.  Suggest to the user that he set a quirk, so we
1295          * don't go through the retry process the first time in the future.
1296          * This should only happen on changers that claim SCSI-3 or higher,
1297          * but don't support these bits.
1298          */
1299         if ((try_no_dvcid != 0)
1300          && (error == 0))
1301                 softc->quirks |= CH_Q_NO_DVCID;
1302
1303         if (error)
1304                 goto done;
1305         cam_periph_unlock(periph);
1306
1307         st_hdr = (struct read_element_status_header *)data;
1308         pg_hdr = (struct read_element_status_page_header *)((uintptr_t)st_hdr +
1309                   sizeof(struct read_element_status_header));
1310         desclen = scsi_2btoul(pg_hdr->edl);
1311
1312         size = sizeof(struct read_element_status_header) +
1313                sizeof(struct read_element_status_page_header) +
1314                (desclen * cesr->cesr_element_count);
1315         /*
1316          * Reallocate storage for descriptors and get them from the
1317          * device.
1318          */
1319         free(data, M_DEVBUF);
1320         data = (caddr_t)malloc(size, M_DEVBUF, M_WAITOK);
1321
1322         cam_periph_lock(periph);
1323         scsi_read_element_status(&ccb->csio,
1324                                  /* retries */ 1,
1325                                  /* cbfcnp */ chdone,
1326                                  /* tag_action */ MSG_SIMPLE_Q_TAG,
1327                                  /* voltag */ want_voltags,
1328                                  /* sea */ softc->sc_firsts[chet]
1329                                  + cesr->cesr_element_base,
1330                                  /* curdata */ curdata,
1331                                  /* dvcid */ dvcid,
1332                                  /* count */ cesr->cesr_element_count,
1333                                  /* data_ptr */ data,
1334                                  /* dxfer_len */ size,
1335                                  /* sense_len */ SSD_FULL_SIZE,
1336                                  /* timeout */ CH_TIMEOUT_READ_ELEMENT_STATUS);
1337
1338         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
1339                                   /*sense_flags*/ SF_RETRY_UA,
1340                                   softc->device_stats);
1341
1342         if (error)
1343                 goto done;
1344         cam_periph_unlock(periph);
1345
1346         /*
1347          * Fill in the user status array.
1348          */
1349         st_hdr = (struct read_element_status_header *)data;
1350         pg_hdr = (struct read_element_status_page_header *)((uintptr_t)st_hdr +
1351                   sizeof(struct read_element_status_header));
1352         avail = scsi_2btoul(st_hdr->count);
1353
1354         if (avail != cesr->cesr_element_count) {
1355                 xpt_print(periph->path,
1356                     "warning, READ ELEMENT STATUS avail != count\n");
1357         }
1358
1359         user_data = (struct changer_element_status *)
1360                 malloc(avail * sizeof(struct changer_element_status),
1361                        M_DEVBUF, M_WAITOK | M_ZERO);
1362
1363         desc = (struct read_element_status_descriptor *)((uintptr_t)data +
1364                 sizeof(struct read_element_status_header) +
1365                 sizeof(struct read_element_status_page_header));
1366         /*
1367          * Set up the individual element status structures
1368          */
1369         for (i = 0; i < avail; ++i) {
1370                 struct changer_element_status *ces;
1371
1372                 /*
1373                  * In the changer_element_status structure, fields from
1374                  * the beginning to the field of ces_scsi_lun are common
1375                  * between SCSI-2 and SCSI-3, while all the rest are new
1376                  * from SCSI-3. In order to maintain backward compatibility
1377                  * of the chio command, the ces pointer, below, is computed
1378                  * such that it lines up with the structure boundary
1379                  * corresponding to the SCSI version.
1380                  */
1381                 ces = cmd == OCHIOGSTATUS ?
1382                     (struct changer_element_status *)
1383                     ((unsigned char *)user_data + i *
1384                      (offsetof(struct changer_element_status,ces_scsi_lun)+1)):
1385                     &user_data[i];
1386
1387                 copy_element_status(softc, pg_hdr->flags, desc,
1388                                     ces, scsi_version);
1389
1390                 desc = (struct read_element_status_descriptor *)
1391                        ((unsigned char *)desc + desclen);
1392         }
1393
1394         /* Copy element status structures out to userspace. */
1395         if (cmd == OCHIOGSTATUS)
1396                 error = copyout(user_data,
1397                                 cesr->cesr_element_status,
1398                                 avail* (offsetof(struct changer_element_status,
1399                                 ces_scsi_lun) + 1));
1400         else
1401                 error = copyout(user_data,
1402                                 cesr->cesr_element_status,
1403                                 avail * sizeof(struct changer_element_status));
1404
1405         cam_periph_lock(periph);
1406
1407  done:
1408         xpt_release_ccb(ccb);
1409
1410         if (data != NULL)
1411                 free(data, M_DEVBUF);
1412         if (user_data != NULL)
1413                 free(user_data, M_DEVBUF);
1414
1415         return (error);
1416 }
1417
1418 static int
1419 chielem(struct cam_periph *periph,
1420         unsigned int timeout)
1421 {
1422         union ccb *ccb;
1423         struct ch_softc *softc;
1424         int error;
1425
1426         if (!timeout) {
1427                 timeout = CH_TIMEOUT_INITIALIZE_ELEMENT_STATUS;
1428         } else {
1429                 timeout *= 1000;
1430         }
1431
1432         error = 0;
1433         softc = (struct ch_softc *)periph->softc;
1434
1435         ccb = cam_periph_getccb(periph, CAM_PRIORITY_NORMAL);
1436
1437         scsi_initialize_element_status(&ccb->csio,
1438                                       /* retries */ 1,
1439                                       /* cbfcnp */ chdone,
1440                                       /* tag_action */ MSG_SIMPLE_Q_TAG,
1441                                       /* sense_len */ SSD_FULL_SIZE,
1442                                       /* timeout */ timeout);
1443
1444         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
1445                                   /*sense_flags*/ SF_RETRY_UA,
1446                                   softc->device_stats);
1447
1448         xpt_release_ccb(ccb);
1449
1450         return(error);
1451 }
1452
1453 static int
1454 chsetvoltag(struct cam_periph *periph,
1455             struct changer_set_voltag_request *csvr)
1456 {
1457         union ccb *ccb;
1458         struct ch_softc *softc;
1459         u_int16_t ea;
1460         u_int8_t sac;
1461         struct scsi_send_volume_tag_parameters ssvtp;
1462         int error;
1463         int i;
1464
1465         error = 0;
1466         softc = (struct ch_softc *)periph->softc;
1467
1468         bzero(&ssvtp, sizeof(ssvtp));
1469         for (i=0; i<sizeof(ssvtp.vitf); i++) {
1470                 ssvtp.vitf[i] = ' ';
1471         }
1472
1473         /*
1474          * Check arguments.
1475          */
1476         if (csvr->csvr_type > CHET_DT)
1477                 return EINVAL;
1478         if (csvr->csvr_addr > (softc->sc_counts[csvr->csvr_type] - 1))
1479                 return ENODEV;
1480
1481         ea = softc->sc_firsts[csvr->csvr_type] + csvr->csvr_addr;
1482
1483         if (csvr->csvr_flags & CSVR_ALTERNATE) {
1484                 switch (csvr->csvr_flags & CSVR_MODE_MASK) {
1485                 case CSVR_MODE_SET:
1486                         sac = SEND_VOLUME_TAG_ASSERT_ALTERNATE;
1487                         break;
1488                 case CSVR_MODE_REPLACE:
1489                         sac = SEND_VOLUME_TAG_REPLACE_ALTERNATE;
1490                         break;
1491                 case CSVR_MODE_CLEAR:
1492                         sac = SEND_VOLUME_TAG_UNDEFINED_ALTERNATE;
1493                         break;
1494                 default:
1495                         error = EINVAL;
1496                         goto out;
1497                 }
1498         } else {
1499                 switch (csvr->csvr_flags & CSVR_MODE_MASK) {
1500                 case CSVR_MODE_SET:
1501                         sac = SEND_VOLUME_TAG_ASSERT_PRIMARY;
1502                         break;
1503                 case CSVR_MODE_REPLACE:
1504                         sac = SEND_VOLUME_TAG_REPLACE_PRIMARY;
1505                         break;
1506                 case CSVR_MODE_CLEAR:
1507                         sac = SEND_VOLUME_TAG_UNDEFINED_PRIMARY;
1508                         break;
1509                 default:
1510                         error = EINVAL;
1511                         goto out;
1512                 }
1513         }
1514
1515         memcpy(ssvtp.vitf, csvr->csvr_voltag.cv_volid,
1516                min(strlen(csvr->csvr_voltag.cv_volid), sizeof(ssvtp.vitf)));
1517         scsi_ulto2b(csvr->csvr_voltag.cv_serial, ssvtp.minvsn);
1518
1519         ccb = cam_periph_getccb(periph, CAM_PRIORITY_NORMAL);
1520
1521         scsi_send_volume_tag(&ccb->csio,
1522                              /* retries */ 1,
1523                              /* cbfcnp */ chdone,
1524                              /* tag_action */ MSG_SIMPLE_Q_TAG,
1525                              /* element_address */ ea,
1526                              /* send_action_code */ sac,
1527                              /* parameters */ &ssvtp,
1528                              /* sense_len */ SSD_FULL_SIZE,
1529                              /* timeout */ CH_TIMEOUT_SEND_VOLTAG);
1530
1531         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
1532                                   /*sense_flags*/ SF_RETRY_UA,
1533                                   softc->device_stats);
1534
1535         xpt_release_ccb(ccb);
1536
1537  out:
1538         return error;
1539 }
1540
1541 static int
1542 chgetparams(struct cam_periph *periph)
1543 {
1544         union ccb *ccb;
1545         struct ch_softc *softc;
1546         void *mode_buffer;
1547         int mode_buffer_len;
1548         struct page_element_address_assignment *ea;
1549         struct page_device_capabilities *cap;
1550         int error, from, dbd;
1551         u_int8_t *moves, *exchanges;
1552
1553         error = 0;
1554
1555         softc = (struct ch_softc *)periph->softc;
1556
1557         ccb = cam_periph_getccb(periph, CAM_PRIORITY_NORMAL);
1558
1559         /*
1560          * The scsi_mode_sense_data structure is just a convenience
1561          * structure that allows us to easily calculate the worst-case
1562          * storage size of the mode sense buffer.
1563          */
1564         mode_buffer_len = sizeof(struct scsi_mode_sense_data);
1565
1566         mode_buffer = malloc(mode_buffer_len, M_SCSICH, M_NOWAIT);
1567
1568         if (mode_buffer == NULL) {
1569                 printf("chgetparams: couldn't malloc mode sense data\n");
1570                 xpt_release_ccb(ccb);
1571                 return(ENOSPC);
1572         }
1573
1574         bzero(mode_buffer, mode_buffer_len);
1575
1576         if (softc->quirks & CH_Q_NO_DBD)
1577                 dbd = FALSE;
1578         else
1579                 dbd = TRUE;
1580
1581         /*
1582          * Get the element address assignment page.
1583          */
1584         scsi_mode_sense(&ccb->csio,
1585                         /* retries */ 1,
1586                         /* cbfcnp */ chdone,
1587                         /* tag_action */ MSG_SIMPLE_Q_TAG,
1588                         /* dbd */ dbd,
1589                         /* pc */ SMS_PAGE_CTRL_CURRENT,
1590                         /* page */ CH_ELEMENT_ADDR_ASSIGN_PAGE,
1591                         /* param_buf */ (u_int8_t *)mode_buffer,
1592                         /* param_len */ mode_buffer_len,
1593                         /* sense_len */ SSD_FULL_SIZE,
1594                         /* timeout */ CH_TIMEOUT_MODE_SENSE);
1595
1596         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
1597                                   /* sense_flags */ SF_RETRY_UA|SF_NO_PRINT,
1598                                   softc->device_stats);
1599
1600         if (error) {
1601                 if (dbd) {
1602                         struct scsi_mode_sense_6 *sms;
1603
1604                         sms = (struct scsi_mode_sense_6 *)
1605                                 ccb->csio.cdb_io.cdb_bytes;
1606
1607                         sms->byte2 &= ~SMS_DBD;
1608                         error = cam_periph_runccb(ccb, cherror,
1609                                                   /*cam_flags*/ CAM_RETRY_SELTO,
1610                                                   /*sense_flags*/ SF_RETRY_UA,
1611                                                   softc->device_stats);
1612                 } else {
1613                         /*
1614                          * Since we disabled sense printing above, print
1615                          * out the sense here since we got an error.
1616                          */
1617                         scsi_sense_print(&ccb->csio);
1618                 }
1619
1620                 if (error) {
1621                         xpt_print(periph->path,
1622                             "chgetparams: error getting element "
1623                             "address page\n");
1624                         xpt_release_ccb(ccb);
1625                         free(mode_buffer, M_SCSICH);
1626                         return(error);
1627                 }
1628         }
1629
1630         ea = (struct page_element_address_assignment *)
1631                 find_mode_page_6((struct scsi_mode_header_6 *)mode_buffer);
1632
1633         softc->sc_firsts[CHET_MT] = scsi_2btoul(ea->mtea);
1634         softc->sc_counts[CHET_MT] = scsi_2btoul(ea->nmte);
1635         softc->sc_firsts[CHET_ST] = scsi_2btoul(ea->fsea);
1636         softc->sc_counts[CHET_ST] = scsi_2btoul(ea->nse);
1637         softc->sc_firsts[CHET_IE] = scsi_2btoul(ea->fieea);
1638         softc->sc_counts[CHET_IE] = scsi_2btoul(ea->niee);
1639         softc->sc_firsts[CHET_DT] = scsi_2btoul(ea->fdtea);
1640         softc->sc_counts[CHET_DT] = scsi_2btoul(ea->ndte);
1641
1642         bzero(mode_buffer, mode_buffer_len);
1643
1644         /*
1645          * Now get the device capabilities page.
1646          */
1647         scsi_mode_sense(&ccb->csio,
1648                         /* retries */ 1,
1649                         /* cbfcnp */ chdone,
1650                         /* tag_action */ MSG_SIMPLE_Q_TAG,
1651                         /* dbd */ dbd,
1652                         /* pc */ SMS_PAGE_CTRL_CURRENT,
1653                         /* page */ CH_DEVICE_CAP_PAGE,
1654                         /* param_buf */ (u_int8_t *)mode_buffer,
1655                         /* param_len */ mode_buffer_len,
1656                         /* sense_len */ SSD_FULL_SIZE,
1657                         /* timeout */ CH_TIMEOUT_MODE_SENSE);
1658
1659         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
1660                                   /* sense_flags */ SF_RETRY_UA | SF_NO_PRINT,
1661                                   softc->device_stats);
1662
1663         if (error) {
1664                 if (dbd) {
1665                         struct scsi_mode_sense_6 *sms;
1666
1667                         sms = (struct scsi_mode_sense_6 *)
1668                                 ccb->csio.cdb_io.cdb_bytes;
1669
1670                         sms->byte2 &= ~SMS_DBD;
1671                         error = cam_periph_runccb(ccb, cherror,
1672                                                   /*cam_flags*/ CAM_RETRY_SELTO,
1673                                                   /*sense_flags*/ SF_RETRY_UA,
1674                                                   softc->device_stats);
1675                 } else {
1676                         /*
1677                          * Since we disabled sense printing above, print
1678                          * out the sense here since we got an error.
1679                          */
1680                         scsi_sense_print(&ccb->csio);
1681                 }
1682
1683                 if (error) {
1684                         xpt_print(periph->path,
1685                             "chgetparams: error getting device "
1686                             "capabilities page\n");
1687                         xpt_release_ccb(ccb);
1688                         free(mode_buffer, M_SCSICH);
1689                         return(error);
1690                 }
1691         }
1692
1693         xpt_release_ccb(ccb);
1694
1695         cap = (struct page_device_capabilities *)
1696                 find_mode_page_6((struct scsi_mode_header_6 *)mode_buffer);
1697
1698         bzero(softc->sc_movemask, sizeof(softc->sc_movemask));
1699         bzero(softc->sc_exchangemask, sizeof(softc->sc_exchangemask));
1700         moves = cap->move_from;
1701         exchanges = cap->exchange_with;
1702         for (from = CHET_MT; from <= CHET_MAX; ++from) {
1703                 softc->sc_movemask[from] = moves[from];
1704                 softc->sc_exchangemask[from] = exchanges[from];
1705         }
1706
1707         free(mode_buffer, M_SCSICH);
1708
1709         return(error);
1710 }
1711
1712 static int
1713 chscsiversion(struct cam_periph *periph)
1714 {
1715         struct scsi_inquiry_data *inq_data;
1716         struct ccb_getdev *cgd;
1717         int dev_scsi_version;
1718
1719         cam_periph_assert(periph, MA_OWNED);
1720         if ((cgd = (struct ccb_getdev *)xpt_alloc_ccb_nowait()) == NULL)
1721                 return (-1);
1722         /*
1723          * Get the device information.
1724          */
1725         xpt_setup_ccb(&cgd->ccb_h,
1726                       periph->path,
1727                       CAM_PRIORITY_NORMAL);
1728         cgd->ccb_h.func_code = XPT_GDEV_TYPE;
1729         xpt_action((union ccb *)cgd);
1730
1731         if (cgd->ccb_h.status != CAM_REQ_CMP) {
1732                 xpt_free_ccb((union ccb *)cgd);
1733                 return -1;
1734         }
1735
1736         inq_data = &cgd->inq_data;
1737         dev_scsi_version = inq_data->version;
1738         xpt_free_ccb((union ccb *)cgd);
1739
1740         return dev_scsi_version;
1741 }
1742
1743 void
1744 scsi_move_medium(struct ccb_scsiio *csio, u_int32_t retries,
1745                  void (*cbfcnp)(struct cam_periph *, union ccb *),
1746                  u_int8_t tag_action, u_int32_t tea, u_int32_t src,
1747                  u_int32_t dst, int invert, u_int8_t sense_len,
1748                  u_int32_t timeout)
1749 {
1750         struct scsi_move_medium *scsi_cmd;
1751
1752         scsi_cmd = (struct scsi_move_medium *)&csio->cdb_io.cdb_bytes;
1753         bzero(scsi_cmd, sizeof(*scsi_cmd));
1754
1755         scsi_cmd->opcode = MOVE_MEDIUM;
1756
1757         scsi_ulto2b(tea, scsi_cmd->tea);
1758         scsi_ulto2b(src, scsi_cmd->src);
1759         scsi_ulto2b(dst, scsi_cmd->dst);
1760
1761         if (invert)
1762                 scsi_cmd->invert |= MOVE_MEDIUM_INVERT;
1763
1764         cam_fill_csio(csio,
1765                       retries,
1766                       cbfcnp,
1767                       /*flags*/ CAM_DIR_NONE,
1768                       tag_action,
1769                       /*data_ptr*/ NULL,
1770                       /*dxfer_len*/ 0,
1771                       sense_len,
1772                       sizeof(*scsi_cmd),
1773                       timeout);
1774 }
1775
1776 void
1777 scsi_exchange_medium(struct ccb_scsiio *csio, u_int32_t retries,
1778                      void (*cbfcnp)(struct cam_periph *, union ccb *),
1779                      u_int8_t tag_action, u_int32_t tea, u_int32_t src,
1780                      u_int32_t dst1, u_int32_t dst2, int invert1,
1781                      int invert2, u_int8_t sense_len, u_int32_t timeout)
1782 {
1783         struct scsi_exchange_medium *scsi_cmd;
1784
1785         scsi_cmd = (struct scsi_exchange_medium *)&csio->cdb_io.cdb_bytes;
1786         bzero(scsi_cmd, sizeof(*scsi_cmd));
1787
1788         scsi_cmd->opcode = EXCHANGE_MEDIUM;
1789
1790         scsi_ulto2b(tea, scsi_cmd->tea);
1791         scsi_ulto2b(src, scsi_cmd->src);
1792         scsi_ulto2b(dst1, scsi_cmd->fdst);
1793         scsi_ulto2b(dst2, scsi_cmd->sdst);
1794
1795         if (invert1)
1796                 scsi_cmd->invert |= EXCHANGE_MEDIUM_INV1;
1797
1798         if (invert2)
1799                 scsi_cmd->invert |= EXCHANGE_MEDIUM_INV2;
1800
1801         cam_fill_csio(csio,
1802                       retries,
1803                       cbfcnp,
1804                       /*flags*/ CAM_DIR_NONE,
1805                       tag_action,
1806                       /*data_ptr*/ NULL,
1807                       /*dxfer_len*/ 0,
1808                       sense_len,
1809                       sizeof(*scsi_cmd),
1810                       timeout);
1811 }
1812
1813 void
1814 scsi_position_to_element(struct ccb_scsiio *csio, u_int32_t retries,
1815                          void (*cbfcnp)(struct cam_periph *, union ccb *),
1816                          u_int8_t tag_action, u_int32_t tea, u_int32_t dst,
1817                          int invert, u_int8_t sense_len, u_int32_t timeout)
1818 {
1819         struct scsi_position_to_element *scsi_cmd;
1820
1821         scsi_cmd = (struct scsi_position_to_element *)&csio->cdb_io.cdb_bytes;
1822         bzero(scsi_cmd, sizeof(*scsi_cmd));
1823
1824         scsi_cmd->opcode = POSITION_TO_ELEMENT;
1825
1826         scsi_ulto2b(tea, scsi_cmd->tea);
1827         scsi_ulto2b(dst, scsi_cmd->dst);
1828
1829         if (invert)
1830                 scsi_cmd->invert |= POSITION_TO_ELEMENT_INVERT;
1831
1832         cam_fill_csio(csio,
1833                       retries,
1834                       cbfcnp,
1835                       /*flags*/ CAM_DIR_NONE,
1836                       tag_action,
1837                       /*data_ptr*/ NULL,
1838                       /*dxfer_len*/ 0,
1839                       sense_len,
1840                       sizeof(*scsi_cmd),
1841                       timeout);
1842 }
1843
1844 void
1845 scsi_read_element_status(struct ccb_scsiio *csio, u_int32_t retries,
1846                          void (*cbfcnp)(struct cam_periph *, union ccb *),
1847                          u_int8_t tag_action, int voltag, u_int32_t sea,
1848                          int curdata, int dvcid,
1849                          u_int32_t count, u_int8_t *data_ptr,
1850                          u_int32_t dxfer_len, u_int8_t sense_len,
1851                          u_int32_t timeout)
1852 {
1853         struct scsi_read_element_status *scsi_cmd;
1854
1855         scsi_cmd = (struct scsi_read_element_status *)&csio->cdb_io.cdb_bytes;
1856         bzero(scsi_cmd, sizeof(*scsi_cmd));
1857
1858         scsi_cmd->opcode = READ_ELEMENT_STATUS;
1859
1860         scsi_ulto2b(sea, scsi_cmd->sea);
1861         scsi_ulto2b(count, scsi_cmd->count);
1862         scsi_ulto3b(dxfer_len, scsi_cmd->len);
1863         if (dvcid)
1864                 scsi_cmd->flags |= READ_ELEMENT_STATUS_DVCID;
1865         if (curdata)
1866                 scsi_cmd->flags |= READ_ELEMENT_STATUS_CURDATA;
1867
1868         if (voltag)
1869                 scsi_cmd->byte2 |= READ_ELEMENT_STATUS_VOLTAG;
1870
1871         cam_fill_csio(csio,
1872                       retries,
1873                       cbfcnp,
1874                       /*flags*/ CAM_DIR_IN,
1875                       tag_action,
1876                       data_ptr,
1877                       dxfer_len,
1878                       sense_len,
1879                       sizeof(*scsi_cmd),
1880                       timeout);
1881 }
1882
1883 void
1884 scsi_initialize_element_status(struct ccb_scsiio *csio, u_int32_t retries,
1885                                void (*cbfcnp)(struct cam_periph *, union ccb *),
1886                                u_int8_t tag_action, u_int8_t sense_len,
1887                                u_int32_t timeout)
1888 {
1889         struct scsi_initialize_element_status *scsi_cmd;
1890
1891         scsi_cmd = (struct scsi_initialize_element_status *)
1892                     &csio->cdb_io.cdb_bytes;
1893         bzero(scsi_cmd, sizeof(*scsi_cmd));
1894
1895         scsi_cmd->opcode = INITIALIZE_ELEMENT_STATUS;
1896
1897         cam_fill_csio(csio,
1898                       retries,
1899                       cbfcnp,
1900                       /*flags*/ CAM_DIR_NONE,
1901                       tag_action,
1902                       /* data_ptr */ NULL,
1903                       /* dxfer_len */ 0,
1904                       sense_len,
1905                       sizeof(*scsi_cmd),
1906                       timeout);
1907 }
1908
1909 void
1910 scsi_send_volume_tag(struct ccb_scsiio *csio, u_int32_t retries,
1911                      void (*cbfcnp)(struct cam_periph *, union ccb *),
1912                      u_int8_t tag_action,
1913                      u_int16_t element_address,
1914                      u_int8_t send_action_code,
1915                      struct scsi_send_volume_tag_parameters *parameters,
1916                      u_int8_t sense_len, u_int32_t timeout)
1917 {
1918         struct scsi_send_volume_tag *scsi_cmd;
1919
1920         scsi_cmd = (struct scsi_send_volume_tag *) &csio->cdb_io.cdb_bytes;
1921         bzero(scsi_cmd, sizeof(*scsi_cmd));
1922
1923         scsi_cmd->opcode = SEND_VOLUME_TAG;
1924         scsi_ulto2b(element_address, scsi_cmd->ea);
1925         scsi_cmd->sac = send_action_code;
1926         scsi_ulto2b(sizeof(*parameters), scsi_cmd->pll);
1927
1928         cam_fill_csio(csio,
1929                       retries,
1930                       cbfcnp,
1931                       /*flags*/ CAM_DIR_OUT,
1932                       tag_action,
1933                       /* data_ptr */ (u_int8_t *) parameters,
1934                       sizeof(*parameters),
1935                       sense_len,
1936                       sizeof(*scsi_cmd),
1937                       timeout);
1938 }