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               = 100000;
 103 static const u_int32_t  CH_TIMEOUT_EXCHANGE_MEDIUM           = 100000;
 104 static const u_int32_t  CH_TIMEOUT_POSITION_TO_ELEMENT       = 100000;
 105 static const u_int32_t  CH_TIMEOUT_READ_ELEMENT_STATUS       = 60000;
 106 static const u_int32_t  CH_TIMEOUT_SEND_VOLTAG               = 10000;
 107 static const u_int32_t  CH_TIMEOUT_INITIALIZE_ELEMENT_STATUS = 500000;
 108
 109 typedef enum {
 110         CH_FLAG_INVALID         = 0x001
 111 } ch_flags;
 112
 113 typedef enum {
 114         CH_STATE_PROBE,
 115         CH_STATE_NORMAL
 116 } ch_state;
 117
 118 typedef enum {
 119         CH_CCB_PROBE,
 120         CH_CCB_WAITING
 121 } ch_ccb_types;
 122
 123 typedef enum {
 124         CH_Q_NONE       = 0x00,
 125         CH_Q_NO_DBD     = 0x01,
 126         CH_Q_NO_DVCID   = 0x02
 127 } ch_quirks;
 128
 129 #define CH_Q_BIT_STRING \
 130         "\020"          \
 131         "\001NO_DBD"    \
 132         "\002NO_DVCID"
 133
 134 #define ccb_state       ppriv_field0
 135 #define ccb_bp          ppriv_ptr1
 136
 137 struct scsi_mode_sense_data {
 138         struct scsi_mode_header_6 header;
 139         struct scsi_mode_blk_desc blk_desc;
 140         union {
 141                 struct page_element_address_assignment ea;
 142                 struct page_transport_geometry_parameters tg;
 143                 struct page_device_capabilities cap;
 144         } pages;
 145 };
 146
 147 struct ch_softc {
 148         ch_flags        flags;
 149         ch_state        state;
 150         ch_quirks       quirks;
 151         union ccb       saved_ccb;
 152         struct devstat  *device_stats;
 153         struct cdev     *dev;
 154         int             open_count;
 155
 156         int             sc_picker;      /* current picker */
 157
 158         /*
 159          * The following information is obtained from the
 160          * element address assignment page.
 161          */
 162         int             sc_firsts[CHET_MAX + 1];        /* firsts */
 163         int             sc_counts[CHET_MAX + 1];        /* counts */
 164
 165         /*
 166          * The following mask defines the legal combinations
 167          * of elements for the MOVE MEDIUM command.
 168          */
 169         u_int8_t        sc_movemask[CHET_MAX + 1];
 170
 171         /*
 172          * As above, but for EXCHANGE MEDIUM.
 173          */
 174         u_int8_t        sc_exchangemask[CHET_MAX + 1];
 175
 176         /*
 177          * Quirks; see below.  XXX KDM not implemented yet
 178          */
 179         int             sc_settledelay; /* delay for settle */
 180 };
 181
 182 static  d_open_t        chopen;
 183 static  d_close_t       chclose;
 184 static  d_ioctl_t       chioctl;
 185 static  periph_init_t   chinit;
 186 static  periph_ctor_t   chregister;
 187 static  periph_oninv_t  choninvalidate;
 188 static  periph_dtor_t   chcleanup;
 189 static  periph_start_t  chstart;
 190 static  void            chasync(void *callback_arg, u_int32_t code,
 191                                 struct cam_path *path, void *arg);
 192 static  void            chdone(struct cam_periph *periph,
 193                                union ccb *done_ccb);
 194 static  int             cherror(union ccb *ccb, u_int32_t cam_flags,
 195                                 u_int32_t sense_flags);
 196 static  int             chmove(struct cam_periph *periph,
 197                                struct changer_move *cm);
 198 static  int             chexchange(struct cam_periph *periph,
 199                                    struct changer_exchange *ce);
 200 static  int             chposition(struct cam_periph *periph,
 201                                    struct changer_position *cp);
 202 static  int             chgetelemstatus(struct cam_periph *periph,
 203                                 int scsi_version, u_long cmd,
 204                                 struct changer_element_status_request *csr);
 205 static  int             chsetvoltag(struct cam_periph *periph,
 206                                     struct changer_set_voltag_request *csvr);
 207 static  int             chielem(struct cam_periph *periph,
 208                                 unsigned int timeout);
 209 static  int             chgetparams(struct cam_periph *periph);
 210 static  int             chscsiversion(struct cam_periph *periph);
 211
 212 static struct periph_driver chdriver =
 213 {
 214         chinit, "ch",
 215         TAILQ_HEAD_INITIALIZER(chdriver.units), /* generation */ 0
 216 };
 217
 218 PERIPHDRIVER_DECLARE(ch, chdriver);
 219
 220 static struct cdevsw ch_cdevsw = {
 221         .d_version =    D_VERSION,
 222         .d_flags =      D_TRACKCLOSE,
 223         .d_open =       chopen,
 224         .d_close =      chclose,
 225         .d_ioctl =      chioctl,
 226         .d_name =       "ch",
 227 };
 228
 229 static MALLOC_DEFINE(M_SCSICH, "scsi_ch", "scsi_ch buffers");
 230
 231 static void
 232 chinit(void)
 233 {
 234         cam_status status;
 235
 236         /*
 237          * Install a global async callback.  This callback will
 238          * receive async callbacks like "new device found".
 239          */
 240         status = xpt_register_async(AC_FOUND_DEVICE, chasync, NULL, NULL);
 241
 242         if (status != CAM_REQ_CMP) {
 243                 printf("ch: Failed to attach master async callback "
 244                        "due to status 0x%x!\n", status);
 245         }
 246 }
 247
 248 static void
 249 chdevgonecb(void *arg)
 250 {
 251         struct cam_sim    *sim;
 252         struct ch_softc   *softc;
 253         struct cam_periph *periph;
 254         int i;
 255
 256         periph = (struct cam_periph *)arg;
 257         sim = periph->sim;
 258         softc = (struct ch_softc *)periph->softc;
 259
 260         KASSERT(softc->open_count >= 0, ("Negative open count %d",
 261                 softc->open_count));
 262
 263         mtx_lock(sim->mtx);
 264
 265         /*
 266          * When we get this callback, we will get no more close calls from
 267          * devfs.  So if we have any dangling opens, we need to release the
 268          * reference held for that particular context.
 269          */
 270         for (i = 0; i < softc->open_count; i++)
 271                 cam_periph_release_locked(periph);
 272
 273         softc->open_count = 0;
 274
 275         /*
 276          * Release the reference held for the device node, it is gone now.
 277          */
 278         cam_periph_release_locked(periph);
 279
 280         /*
 281          * We reference the SIM lock directly here, instead of using
 282          * cam_periph_unlock().  The reason is that the final call to
 283          * cam_periph_release_locked() above could result in the periph
 284          * getting freed.  If that is the case, dereferencing the periph
 285          * with a cam_periph_unlock() call would cause a page fault.
 286          */
 287         mtx_unlock(sim->mtx);
 288 }
 289
 290 static void
 291 choninvalidate(struct cam_periph *periph)
 292 {
 293         struct ch_softc *softc;
 294
 295         softc = (struct ch_softc *)periph->softc;
 296
 297         /*
 298          * De-register any async callbacks.
 299          */
 300         xpt_register_async(0, chasync, periph, periph->path);
 301
 302         softc->flags |= CH_FLAG_INVALID;
 303
 304         /*
 305          * Tell devfs this device has gone away, and ask for a callback
 306          * when it has cleaned up its state.
 307          */
 308         destroy_dev_sched_cb(softc->dev, chdevgonecb, periph);
 309
 310         xpt_print(periph->path, "lost device\n");
 311
 312 }
 313
 314 static void
 315 chcleanup(struct cam_periph *periph)
 316 {
 317         struct ch_softc *softc;
 318
 319         softc = (struct ch_softc *)periph->softc;
 320
 321         xpt_print(periph->path, "removing device entry\n");
 322
 323         devstat_remove_entry(softc->device_stats);
 324
 325         free(softc, M_DEVBUF);
 326 }
 327
 328 static void
 329 chasync(void *callback_arg, u_int32_t code, struct cam_path *path, void *arg)
 330 {
 331         struct cam_periph *periph;
 332
 333         periph = (struct cam_periph *)callback_arg;
 334
 335         switch(code) {
 336         case AC_FOUND_DEVICE:
 337         {
 338                 struct ccb_getdev *cgd;
 339                 cam_status status;
 340
 341                 cgd = (struct ccb_getdev *)arg;
 342                 if (cgd == NULL)
 343                         break;
 344
 345                 if (cgd->protocol != PROTO_SCSI)
 346                         break;
 347
 348                 if (SID_TYPE(&cgd->inq_data)!= T_CHANGER)
 349                         break;
 350
 351                 /*
 352                  * Allocate a peripheral instance for
 353                  * this device and start the probe
 354                  * process.
 355                  */
 356                 status = cam_periph_alloc(chregister, choninvalidate,
 357                                           chcleanup, chstart, "ch",
 358                                           CAM_PERIPH_BIO, cgd->ccb_h.path,
 359                                           chasync, AC_FOUND_DEVICE, cgd);
 360
 361                 if (status != CAM_REQ_CMP
 362                  && status != CAM_REQ_INPROG)
 363                         printf("chasync: Unable to probe new device "
 364                                "due to status 0x%x\n", status);
 365
 366                 break;
 367
 368         }
 369         default:
 370                 cam_periph_async(periph, code, path, arg);
 371                 break;
 372         }
 373 }
 374
 375 static cam_status
 376 chregister(struct cam_periph *periph, void *arg)
 377 {
 378         struct ch_softc *softc;
 379         struct ccb_getdev *cgd;
 380         struct ccb_pathinq cpi;
 381
 382         cgd = (struct ccb_getdev *)arg;
 383         if (cgd == NULL) {
 384                 printf("chregister: no getdev CCB, can't register device\n");
 385                 return(CAM_REQ_CMP_ERR);
 386         }
 387
 388         softc = (struct ch_softc *)malloc(sizeof(*softc),M_DEVBUF,M_NOWAIT);
 389
 390         if (softc == NULL) {
 391                 printf("chregister: Unable to probe new device. "
 392                        "Unable to allocate softc\n");
 393                 return(CAM_REQ_CMP_ERR);
 394         }
 395
 396         bzero(softc, sizeof(*softc));
 397         softc->state = CH_STATE_PROBE;
 398         periph->softc = softc;
 399         softc->quirks = CH_Q_NONE;
 400
 401         /*
 402          * The DVCID and CURDATA bits were not introduced until the SMC
 403          * spec.  If this device claims SCSI-2 or earlier support, then it
 404          * very likely does not support these bits.
 405          */
 406         if (cgd->inq_data.version <= SCSI_REV_2)
 407                 softc->quirks |= CH_Q_NO_DVCID;
 408
 409         bzero(&cpi, sizeof(cpi));
 410         xpt_setup_ccb(&cpi.ccb_h, periph->path, CAM_PRIORITY_NORMAL);
 411         cpi.ccb_h.func_code = XPT_PATH_INQ;
 412         xpt_action((union ccb *)&cpi);
 413
 414         /*
 415          * Changers don't have a blocksize, and obviously don't support
 416          * tagged queueing.
 417          */
 418         cam_periph_unlock(periph);
 419         softc->device_stats = devstat_new_entry("ch",
 420                           periph->unit_number, 0,
 421                           DEVSTAT_NO_BLOCKSIZE | DEVSTAT_NO_ORDERED_TAGS,
 422                           SID_TYPE(&cgd->inq_data) |
 423                           XPORT_DEVSTAT_TYPE(cpi.transport),
 424                           DEVSTAT_PRIORITY_OTHER);
 425
 426         /*
 427          * Acquire a reference to the periph before we create the devfs
 428          * instance for it.  We'll release this reference once the devfs
 429          * instance has been freed.
 430          */
 431         if (cam_periph_acquire(periph) != CAM_REQ_CMP) {
 432                 xpt_print(periph->path, "%s: lost periph during "
 433                           "registration!\n", __func__);
 434                 cam_periph_lock(periph);
 435                 return (CAM_REQ_CMP_ERR);
 436         }
 437
 438
 439         /* Register the device */
 440         softc->dev = make_dev(&ch_cdevsw, periph->unit_number, UID_ROOT,
 441                               GID_OPERATOR, 0600, "%s%d", periph->periph_name,
 442                               periph->unit_number);
 443         cam_periph_lock(periph);
 444         softc->dev->si_drv1 = periph;
 445
 446         /*
 447          * Add an async callback so that we get
 448          * notified if this device goes away.
 449          */
 450         xpt_register_async(AC_LOST_DEVICE, chasync, periph, periph->path);
 451
 452         /*
 453          * Lock this periph until we are setup.
 454          * This first call can't block
 455          */
 456         (void)cam_periph_hold(periph, PRIBIO);
 457         xpt_schedule(periph, CAM_PRIORITY_DEV);
 458
 459         return(CAM_REQ_CMP);
 460 }
 461
 462 static int
 463 chopen(struct cdev *dev, int flags, int fmt, struct thread *td)
 464 {
 465         struct cam_periph *periph;
 466         struct ch_softc *softc;
 467         int error;
 468
 469         periph = (struct cam_periph *)dev->si_drv1;
 470         if (cam_periph_acquire(periph) != CAM_REQ_CMP)
 471                 return (ENXIO);
 472
 473         softc = (struct ch_softc *)periph->softc;
 474
 475         cam_periph_lock(periph);
 476
 477         if (softc->flags & CH_FLAG_INVALID) {
 478                 cam_periph_release_locked(periph);
 479                 cam_periph_unlock(periph);
 480                 return(ENXIO);
 481         }
 482
 483         if ((error = cam_periph_hold(periph, PRIBIO | PCATCH)) != 0) {
 484                 cam_periph_unlock(periph);
 485                 cam_periph_release(periph);
 486                 return (error);
 487         }
 488
 489         /*
 490          * Load information about this changer device into the softc.
 491          */
 492         if ((error = chgetparams(periph)) != 0) {
 493                 cam_periph_unhold(periph);
 494                 cam_periph_release_locked(periph);
 495                 cam_periph_unlock(periph);
 496                 return(error);
 497         }
 498
 499         cam_periph_unhold(periph);
 500
 501         softc->open_count++;
 502
 503         cam_periph_unlock(periph);
 504
 505         return(error);
 506 }
 507
 508 static int
 509 chclose(struct cdev *dev, int flag, int fmt, struct thread *td)
 510 {
 511         struct  cam_sim *sim;
 512         struct  cam_periph *periph;
 513         struct  ch_softc *softc;
 514
 515         periph = (struct cam_periph *)dev->si_drv1;
 516         if (periph == NULL)
 517                 return(ENXIO);
 518
 519         sim = periph->sim;
 520         softc = (struct ch_softc *)periph->softc;
 521
 522         mtx_lock(sim->mtx);
 523
 524         softc->open_count--;
 525
 526         cam_periph_release_locked(periph);
 527
 528         /*
 529          * We reference the SIM 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(sim->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                 if (periph->immediate_priority <= periph->pinfo.priority){
 556                         start_ccb->ccb_h.ccb_state = CH_CCB_WAITING;
 557
 558                         SLIST_INSERT_HEAD(&periph->ccb_list, &start_ccb->ccb_h,
 559                                           periph_links.sle);
 560                         periph->immediate_priority = CAM_PRIORITY_NONE;
 561                         wakeup(&periph->ccb_list);
 562                 }
 563                 break;
 564         }
 565         case CH_STATE_PROBE:
 566         {
 567                 int mode_buffer_len;
 568                 void *mode_buffer;
 569
 570                 /*
 571                  * Include the block descriptor when calculating the mode
 572                  * buffer length,
 573                  */
 574                 mode_buffer_len = sizeof(struct scsi_mode_header_6) +
 575                                   sizeof(struct scsi_mode_blk_desc) +
 576                                  sizeof(struct page_element_address_assignment);
 577
 578                 mode_buffer = malloc(mode_buffer_len, M_SCSICH, M_NOWAIT);
 579
 580                 if (mode_buffer == NULL) {
 581                         printf("chstart: couldn't malloc mode sense data\n");
 582                         break;
 583                 }
 584                 bzero(mode_buffer, mode_buffer_len);
 585
 586                 /*
 587                  * Get the element address assignment page.
 588                  */
 589                 scsi_mode_sense(&start_ccb->csio,
 590                                 /* retries */ 1,
 591                                 /* cbfcnp */ chdone,
 592                                 /* tag_action */ MSG_SIMPLE_Q_TAG,
 593                                 /* dbd */ (softc->quirks & CH_Q_NO_DBD) ?
 594                                         FALSE : TRUE,
 595                                 /* page_code */ SMS_PAGE_CTRL_CURRENT,
 596                                 /* page */ CH_ELEMENT_ADDR_ASSIGN_PAGE,
 597                                 /* param_buf */ (u_int8_t *)mode_buffer,
 598                                 /* param_len */ mode_buffer_len,
 599                                 /* sense_len */ SSD_FULL_SIZE,
 600                                 /* timeout */ CH_TIMEOUT_MODE_SENSE);
 601
 602                 start_ccb->ccb_h.ccb_bp = NULL;
 603                 start_ccb->ccb_h.ccb_state = CH_CCB_PROBE;
 604                 xpt_action(start_ccb);
 605                 break;
 606         }
 607         }
 608 }
 609
 610 static void
 611 chdone(struct cam_periph *periph, union ccb *done_ccb)
 612 {
 613         struct ch_softc *softc;
 614         struct ccb_scsiio *csio;
 615
 616         softc = (struct ch_softc *)periph->softc;
 617         csio = &done_ccb->csio;
 618
 619         switch(done_ccb->ccb_h.ccb_state) {
 620         case CH_CCB_PROBE:
 621         {
 622                 struct scsi_mode_header_6 *mode_header;
 623                 struct page_element_address_assignment *ea;
 624                 char announce_buf[80];
 625
 626
 627                 mode_header = (struct scsi_mode_header_6 *)csio->data_ptr;
 628
 629                 ea = (struct page_element_address_assignment *)
 630                         find_mode_page_6(mode_header);
 631
 632                 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP){
 633
 634                         softc->sc_firsts[CHET_MT] = scsi_2btoul(ea->mtea);
 635                         softc->sc_counts[CHET_MT] = scsi_2btoul(ea->nmte);
 636                         softc->sc_firsts[CHET_ST] = scsi_2btoul(ea->fsea);
 637                         softc->sc_counts[CHET_ST] = scsi_2btoul(ea->nse);
 638                         softc->sc_firsts[CHET_IE] = scsi_2btoul(ea->fieea);
 639                         softc->sc_counts[CHET_IE] = scsi_2btoul(ea->niee);
 640                         softc->sc_firsts[CHET_DT] = scsi_2btoul(ea->fdtea);
 641                         softc->sc_counts[CHET_DT] = scsi_2btoul(ea->ndte);
 642                         softc->sc_picker = softc->sc_firsts[CHET_MT];
 643
 644 #define PLURAL(c)       (c) == 1 ? "" : "s"
 645                         snprintf(announce_buf, sizeof(announce_buf),
 646                                 "%d slot%s, %d drive%s, "
 647                                 "%d picker%s, %d portal%s",
 648                                 softc->sc_counts[CHET_ST],
 649                                 PLURAL(softc->sc_counts[CHET_ST]),
 650                                 softc->sc_counts[CHET_DT],
 651                                 PLURAL(softc->sc_counts[CHET_DT]),
 652                                 softc->sc_counts[CHET_MT],
 653                                 PLURAL(softc->sc_counts[CHET_MT]),
 654                                 softc->sc_counts[CHET_IE],
 655                                 PLURAL(softc->sc_counts[CHET_IE]));
 656 #undef PLURAL
 657                 } else {
 658                         int error;
 659
 660                         error = cherror(done_ccb, CAM_RETRY_SELTO,
 661                                         SF_RETRY_UA | SF_NO_PRINT);
 662                         /*
 663                          * Retry any UNIT ATTENTION type errors.  They
 664                          * are expected at boot.
 665                          */
 666                         if (error == ERESTART) {
 667                                 /*
 668                                  * A retry was scheuled, so
 669                                  * just return.
 670                                  */
 671                                 return;
 672                         } else if (error != 0) {
 673                                 int retry_scheduled;
 674                                 struct scsi_mode_sense_6 *sms;
 675
 676                                 sms = (struct scsi_mode_sense_6 *)
 677                                         done_ccb->csio.cdb_io.cdb_bytes;
 678
 679                                 /*
 680                                  * Check to see if block descriptors were
 681                                  * disabled.  Some devices don't like that.
 682                                  * We're taking advantage of the fact that
 683                                  * the first few bytes of the 6 and 10 byte
 684                                  * mode sense commands are the same.  If
 685                                  * block descriptors were disabled, enable
 686                                  * them and re-send the command.
 687                                  */
 688                                 if (sms->byte2 & SMS_DBD) {
 689                                         sms->byte2 &= ~SMS_DBD;
 690                                         xpt_action(done_ccb);
 691                                         softc->quirks |= CH_Q_NO_DBD;
 692                                         retry_scheduled = 1;
 693                                 } else
 694                                         retry_scheduled = 0;
 695
 696                                 /* Don't wedge this device's queue */
 697                                 if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
 698                                         cam_release_devq(done_ccb->ccb_h.path,
 699                                                  /*relsim_flags*/0,
 700                                                  /*reduction*/0,
 701                                                  /*timeout*/0,
 702                                                  /*getcount_only*/0);
 703
 704                                 if (retry_scheduled)
 705                                         return;
 706
 707                                 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK)
 708                                     == CAM_SCSI_STATUS_ERROR)
 709                                         scsi_sense_print(&done_ccb->csio);
 710                                 else {
 711                                         xpt_print(periph->path,
 712                                             "got CAM status %#x\n",
 713                                             done_ccb->ccb_h.status);
 714                                 }
 715                                 xpt_print(periph->path, "fatal error, failed "
 716                                     "to attach to device\n");
 717
 718                                 cam_periph_invalidate(periph);
 719
 720                                 announce_buf[0] = '\0';
 721                         }
 722                 }
 723                 if (announce_buf[0] != '\0') {
 724                         xpt_announce_periph(periph, announce_buf);
 725                         xpt_announce_quirks(periph, softc->quirks,
 726                             CH_Q_BIT_STRING);
 727                 }
 728                 softc->state = CH_STATE_NORMAL;
 729                 free(mode_header, M_SCSICH);
 730                 /*
 731                  * Since our peripheral may be invalidated by an error
 732                  * above or an external event, we must release our CCB
 733                  * before releasing the probe lock on the peripheral.
 734                  * The peripheral will only go away once the last lock
 735                  * is removed, and we need it around for the CCB release
 736                  * operation.
 737                  */
 738                 xpt_release_ccb(done_ccb);
 739                 cam_periph_unhold(periph);
 740                 return;
 741         }
 742         case CH_CCB_WAITING:
 743         {
 744                 /* Caller will release the CCB */
 745                 wakeup(&done_ccb->ccb_h.cbfcnp);
 746                 return;
 747         }
 748         default:
 749                 break;
 750         }
 751         xpt_release_ccb(done_ccb);
 752 }
 753
 754 static int
 755 cherror(union ccb *ccb, u_int32_t cam_flags, u_int32_t sense_flags)
 756 {
 757         struct ch_softc *softc;
 758         struct cam_periph *periph;
 759
 760         periph = xpt_path_periph(ccb->ccb_h.path);
 761         softc = (struct ch_softc *)periph->softc;
 762
 763         return (cam_periph_error(ccb, cam_flags, sense_flags,
 764                                  &softc->saved_ccb));
 765 }
 766
 767 static int
 768 chioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
 769 {
 770         struct cam_periph *periph;
 771         struct ch_softc *softc;
 772         int error;
 773
 774         periph = (struct cam_periph *)dev->si_drv1;
 775         if (periph == NULL)
 776                 return(ENXIO);
 777
 778         cam_periph_lock(periph);
 779         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("entering chioctl\n"));
 780
 781         softc = (struct ch_softc *)periph->softc;
 782
 783         error = 0;
 784
 785         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE,
 786                   ("trying to do ioctl %#lx\n", cmd));
 787
 788         /*
 789          * If this command can change the device's state, we must
 790          * have the device open for writing.
 791          */
 792         switch (cmd) {
 793         case CHIOGPICKER:
 794         case CHIOGPARAMS:
 795         case OCHIOGSTATUS:
 796         case CHIOGSTATUS:
 797                 break;
 798
 799         default:
 800                 if ((flag & FWRITE) == 0) {
 801                         cam_periph_unlock(periph);
 802                         return (EBADF);
 803                 }
 804         }
 805
 806         switch (cmd) {
 807         case CHIOMOVE:
 808                 error = chmove(periph, (struct changer_move *)addr);
 809                 break;
 810
 811         case CHIOEXCHANGE:
 812                 error = chexchange(periph, (struct changer_exchange *)addr);
 813                 break;
 814
 815         case CHIOPOSITION:
 816                 error = chposition(periph, (struct changer_position *)addr);
 817                 break;
 818
 819         case CHIOGPICKER:
 820                 *(int *)addr = softc->sc_picker - softc->sc_firsts[CHET_MT];
 821                 break;
 822
 823         case CHIOSPICKER:
 824         {
 825                 int new_picker = *(int *)addr;
 826
 827                 if (new_picker > (softc->sc_counts[CHET_MT] - 1)) {
 828                         error = EINVAL;
 829                         break;
 830                 }
 831                 softc->sc_picker = softc->sc_firsts[CHET_MT] + new_picker;
 832                 break;
 833         }
 834         case CHIOGPARAMS:
 835         {
 836                 struct changer_params *cp = (struct changer_params *)addr;
 837
 838                 cp->cp_npickers = softc->sc_counts[CHET_MT];
 839                 cp->cp_nslots = softc->sc_counts[CHET_ST];
 840                 cp->cp_nportals = softc->sc_counts[CHET_IE];
 841                 cp->cp_ndrives = softc->sc_counts[CHET_DT];
 842                 break;
 843         }
 844         case CHIOIELEM:
 845                 error = chielem(periph, *(unsigned int *)addr);
 846                 break;
 847
 848         case OCHIOGSTATUS:
 849         {
 850                 error = chgetelemstatus(periph, SCSI_REV_2, cmd,
 851                     (struct changer_element_status_request *)addr);
 852                 break;
 853         }
 854
 855         case CHIOGSTATUS:
 856         {
 857                 int scsi_version;
 858
 859                 scsi_version = chscsiversion(periph);
 860                 if (scsi_version >= SCSI_REV_0) {
 861                         error = chgetelemstatus(periph, scsi_version, cmd,
 862                             (struct changer_element_status_request *)addr);
 863                 }
 864                 else { /* unable to determine the SCSI version */
 865                         cam_periph_unlock(periph);
 866                         return (ENXIO);
 867                 }
 868                 break;
 869         }
 870
 871         case CHIOSETVOLTAG:
 872         {
 873                 error = chsetvoltag(periph,
 874                                     (struct changer_set_voltag_request *) addr);
 875                 break;
 876         }
 877
 878         /* Implement prevent/allow? */
 879
 880         default:
 881                 error = cam_periph_ioctl(periph, cmd, addr, cherror);
 882                 break;
 883         }
 884
 885         cam_periph_unlock(periph);
 886         return (error);
 887 }
 888
 889 static int
 890 chmove(struct cam_periph *periph, struct changer_move *cm)
 891 {
 892         struct ch_softc *softc;
 893         u_int16_t fromelem, toelem;
 894         union ccb *ccb;
 895         int error;
 896
 897         error = 0;
 898         softc = (struct ch_softc *)periph->softc;
 899
 900         /*
 901          * Check arguments.
 902          */
 903         if ((cm->cm_fromtype > CHET_DT) || (cm->cm_totype > CHET_DT))
 904                 return (EINVAL);
 905         if ((cm->cm_fromunit > (softc->sc_counts[cm->cm_fromtype] - 1)) ||
 906             (cm->cm_tounit > (softc->sc_counts[cm->cm_totype] - 1)))
 907                 return (ENODEV);
 908
 909         /*
 910          * Check the request against the changer's capabilities.
 911          */
 912         if ((softc->sc_movemask[cm->cm_fromtype] & (1 << cm->cm_totype)) == 0)
 913                 return (ENODEV);
 914
 915         /*
 916          * Calculate the source and destination elements.
 917          */
 918         fromelem = softc->sc_firsts[cm->cm_fromtype] + cm->cm_fromunit;
 919         toelem = softc->sc_firsts[cm->cm_totype] + cm->cm_tounit;
 920
 921         ccb = cam_periph_getccb(periph, CAM_PRIORITY_NORMAL);
 922
 923         scsi_move_medium(&ccb->csio,
 924                          /* retries */ 1,
 925                          /* cbfcnp */ chdone,
 926                          /* tag_action */ MSG_SIMPLE_Q_TAG,
 927                          /* tea */ softc->sc_picker,
 928                          /* src */ fromelem,
 929                          /* dst */ toelem,
 930                          /* invert */ (cm->cm_flags & CM_INVERT) ? TRUE : FALSE,
 931                          /* sense_len */ SSD_FULL_SIZE,
 932                          /* timeout */ CH_TIMEOUT_MOVE_MEDIUM);
 933
 934         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/CAM_RETRY_SELTO,
 935                                   /*sense_flags*/ SF_RETRY_UA,
 936                                   softc->device_stats);
 937
 938         xpt_release_ccb(ccb);
 939
 940         return(error);
 941 }
 942
 943 static int
 944 chexchange(struct cam_periph *periph, struct changer_exchange *ce)
 945 {
 946         struct ch_softc *softc;
 947         u_int16_t src, dst1, dst2;
 948         union ccb *ccb;
 949         int error;
 950
 951         error = 0;
 952         softc = (struct ch_softc *)periph->softc;
 953         /*
 954          * Check arguments.
 955          */
 956         if ((ce->ce_srctype > CHET_DT) || (ce->ce_fdsttype > CHET_DT) ||
 957             (ce->ce_sdsttype > CHET_DT))
 958                 return (EINVAL);
 959         if ((ce->ce_srcunit > (softc->sc_counts[ce->ce_srctype] - 1)) ||
 960             (ce->ce_fdstunit > (softc->sc_counts[ce->ce_fdsttype] - 1)) ||
 961             (ce->ce_sdstunit > (softc->sc_counts[ce->ce_sdsttype] - 1)))
 962                 return (ENODEV);
 963
 964         /*
 965          * Check the request against the changer's capabilities.
 966          */
 967         if (((softc->sc_exchangemask[ce->ce_srctype] &
 968              (1 << ce->ce_fdsttype)) == 0) ||
 969             ((softc->sc_exchangemask[ce->ce_fdsttype] &
 970              (1 << ce->ce_sdsttype)) == 0))
 971                 return (ENODEV);
 972
 973         /*
 974          * Calculate the source and destination elements.
 975          */
 976         src = softc->sc_firsts[ce->ce_srctype] + ce->ce_srcunit;
 977         dst1 = softc->sc_firsts[ce->ce_fdsttype] + ce->ce_fdstunit;
 978         dst2 = softc->sc_firsts[ce->ce_sdsttype] + ce->ce_sdstunit;
 979
 980         ccb = cam_periph_getccb(periph, CAM_PRIORITY_NORMAL);
 981
 982         scsi_exchange_medium(&ccb->csio,
 983                              /* retries */ 1,
 984                              /* cbfcnp */ chdone,
 985                              /* tag_action */ MSG_SIMPLE_Q_TAG,
 986                              /* tea */ softc->sc_picker,
 987                              /* src */ src,
 988                              /* dst1 */ dst1,
 989                              /* dst2 */ dst2,
 990                              /* invert1 */ (ce->ce_flags & CE_INVERT1) ?
 991                                            TRUE : FALSE,
 992                              /* invert2 */ (ce->ce_flags & CE_INVERT2) ?
 993                                            TRUE : FALSE,
 994                              /* sense_len */ SSD_FULL_SIZE,
 995                              /* timeout */ CH_TIMEOUT_EXCHANGE_MEDIUM);
 996
 997         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/CAM_RETRY_SELTO,
 998                                   /*sense_flags*/ SF_RETRY_UA,
 999                                   softc->device_stats);
1000
1001         xpt_release_ccb(ccb);
1002
1003         return(error);
1004 }
1005
1006 static int
1007 chposition(struct cam_periph *periph, struct changer_position *cp)
1008 {
1009         struct ch_softc *softc;
1010         u_int16_t dst;
1011         union ccb *ccb;
1012         int error;
1013
1014         error = 0;
1015         softc = (struct ch_softc *)periph->softc;
1016
1017         /*
1018          * Check arguments.
1019          */
1020         if (cp->cp_type > CHET_DT)
1021                 return (EINVAL);
1022         if (cp->cp_unit > (softc->sc_counts[cp->cp_type] - 1))
1023                 return (ENODEV);
1024
1025         /*
1026          * Calculate the destination element.
1027          */
1028         dst = softc->sc_firsts[cp->cp_type] + cp->cp_unit;
1029
1030         ccb = cam_periph_getccb(periph, CAM_PRIORITY_NORMAL);
1031
1032         scsi_position_to_element(&ccb->csio,
1033                                  /* retries */ 1,
1034                                  /* cbfcnp */ chdone,
1035                                  /* tag_action */ MSG_SIMPLE_Q_TAG,
1036                                  /* tea */ softc->sc_picker,
1037                                  /* dst */ dst,
1038                                  /* invert */ (cp->cp_flags & CP_INVERT) ?
1039                                               TRUE : FALSE,
1040                                  /* sense_len */ SSD_FULL_SIZE,
1041                                  /* timeout */ CH_TIMEOUT_POSITION_TO_ELEMENT);
1042
1043         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
1044                                   /*sense_flags*/ SF_RETRY_UA,
1045                                   softc->device_stats);
1046
1047         xpt_release_ccb(ccb);
1048
1049         return(error);
1050 }
1051
1052 /*
1053  * Copy a volume tag to a volume_tag struct, converting SCSI byte order
1054  * to host native byte order in the volume serial number.  The volume
1055  * label as returned by the changer is transferred to user mode as
1056  * nul-terminated string.  Volume labels are truncated at the first
1057  * space, as suggested by SCSI-2.
1058  */
1059 static  void
1060 copy_voltag(struct changer_voltag *uvoltag, struct volume_tag *voltag)
1061 {
1062         int i;
1063         for (i=0; i<CH_VOLTAG_MAXLEN; i++) {
1064                 char c = voltag->vif[i];
1065                 if (c && c != ' ')
1066                         uvoltag->cv_volid[i] = c;
1067                 else
1068                         break;
1069         }
1070         uvoltag->cv_serial = scsi_2btoul(voltag->vsn);
1071 }
1072
1073 /*
1074  * Copy an element status descriptor to a user-mode
1075  * changer_element_status structure.
1076  */
1077 static void
1078 copy_element_status(struct ch_softc *softc,
1079                     u_int16_t flags,
1080                     struct read_element_status_descriptor *desc,
1081                     struct changer_element_status *ces,
1082                     int scsi_version)
1083 {
1084         u_int16_t eaddr = scsi_2btoul(desc->eaddr);
1085         u_int16_t et;
1086         struct volume_tag *pvol_tag = NULL, *avol_tag = NULL;
1087         struct read_element_status_device_id *devid = NULL;
1088
1089         ces->ces_int_addr = eaddr;
1090         /* set up logical address in element status */
1091         for (et = CHET_MT; et <= CHET_DT; et++) {
1092                 if ((softc->sc_firsts[et] <= eaddr)
1093                     && ((softc->sc_firsts[et] + softc->sc_counts[et])
1094                         > eaddr)) {
1095                         ces->ces_addr = eaddr - softc->sc_firsts[et];
1096                         ces->ces_type = et;
1097                         break;
1098                 }
1099         }
1100
1101         ces->ces_flags = desc->flags1;
1102
1103         ces->ces_sensecode = desc->sense_code;
1104         ces->ces_sensequal = desc->sense_qual;
1105
1106         if (desc->flags2 & READ_ELEMENT_STATUS_INVERT)
1107                 ces->ces_flags |= CES_INVERT;
1108
1109         if (desc->flags2 & READ_ELEMENT_STATUS_SVALID) {
1110
1111                 eaddr = scsi_2btoul(desc->ssea);
1112
1113                 /* convert source address to logical format */
1114                 for (et = CHET_MT; et <= CHET_DT; et++) {
1115                         if ((softc->sc_firsts[et] <= eaddr)
1116                             && ((softc->sc_firsts[et] + softc->sc_counts[et])
1117                                 > eaddr)) {
1118                                 ces->ces_source_addr =
1119                                         eaddr - softc->sc_firsts[et];
1120                                 ces->ces_source_type = et;
1121                                 ces->ces_flags |= CES_SOURCE_VALID;
1122                                 break;
1123                         }
1124                 }
1125
1126                 if (!(ces->ces_flags & CES_SOURCE_VALID))
1127                         printf("ch: warning: could not map element source "
1128                                "address %ud to a valid element type\n",
1129                                eaddr);
1130         }
1131
1132         /*
1133          * pvoltag and avoltag are common between SCSI-2 and later versions
1134          */
1135         if (flags & READ_ELEMENT_STATUS_PVOLTAG)
1136                 pvol_tag = &desc->voltag_devid.pvoltag;
1137         if (flags & READ_ELEMENT_STATUS_AVOLTAG)
1138                 avol_tag = (flags & READ_ELEMENT_STATUS_PVOLTAG) ?
1139                     &desc->voltag_devid.voltag[1] :&desc->voltag_devid.pvoltag;
1140         /*
1141          * For SCSI-3 and later, element status can carry designator and
1142          * other information.
1143          */
1144         if (scsi_version >= SCSI_REV_SPC) {
1145                 if ((flags & READ_ELEMENT_STATUS_PVOLTAG) ^
1146                     (flags & READ_ELEMENT_STATUS_AVOLTAG))
1147                         devid = &desc->voltag_devid.pvol_and_devid.devid;
1148                 else if (!(flags & READ_ELEMENT_STATUS_PVOLTAG) &&
1149                          !(flags & READ_ELEMENT_STATUS_AVOLTAG))
1150                         devid = &desc->voltag_devid.devid;
1151                 else /* Have both PVOLTAG and AVOLTAG */
1152                         devid = &desc->voltag_devid.vol_tags_and_devid.devid;
1153         }
1154
1155         if (pvol_tag)
1156                 copy_voltag(&(ces->ces_pvoltag), pvol_tag);
1157         if (avol_tag)
1158                 copy_voltag(&(ces->ces_pvoltag), avol_tag);
1159         if (devid != NULL) {
1160                 if (devid->designator_length > 0) {
1161                         bcopy((void *)devid->designator,
1162                               (void *)ces->ces_designator,
1163                               devid->designator_length);
1164                         ces->ces_designator_length = devid->designator_length;
1165                         /*
1166                          * Make sure we are always NUL terminated.  The
1167                          * This won't matter for the binary code set,
1168                          * since the user will only pay attention to the
1169                          * length field.
1170                          */
1171                         ces->ces_designator[devid->designator_length]= '\0';
1172                 }
1173                 if (devid->piv_assoc_designator_type &
1174                     READ_ELEMENT_STATUS_PIV_SET) {
1175                         ces->ces_flags |= CES_PIV;
1176                         ces->ces_protocol_id =
1177                             READ_ELEMENT_STATUS_PROTOCOL_ID(
1178                             devid->prot_code_set);
1179                 }
1180                 ces->ces_code_set =
1181                     READ_ELEMENT_STATUS_CODE_SET(devid->prot_code_set);
1182                 ces->ces_assoc = READ_ELEMENT_STATUS_ASSOCIATION(
1183                     devid->piv_assoc_designator_type);
1184                 ces->ces_designator_type = READ_ELEMENT_STATUS_DESIGNATOR_TYPE(
1185                     devid->piv_assoc_designator_type);
1186         } else if (scsi_version > SCSI_REV_2) {
1187                 /* SCSI-SPC and No devid, no designator */
1188                 ces->ces_designator_length = 0;
1189                 ces->ces_designator[0] = '\0';
1190                 ces->ces_protocol_id = CES_PROTOCOL_ID_FCP_4;
1191         }
1192
1193         if (scsi_version <= SCSI_REV_2) {
1194                 if (desc->dt_or_obsolete.scsi_2.dt_scsi_flags &
1195                     READ_ELEMENT_STATUS_DT_IDVALID) {
1196                         ces->ces_flags |= CES_SCSIID_VALID;
1197                         ces->ces_scsi_id =
1198                             desc->dt_or_obsolete.scsi_2.dt_scsi_addr;
1199                 }
1200
1201                 if (desc->dt_or_obsolete.scsi_2.dt_scsi_addr &
1202                     READ_ELEMENT_STATUS_DT_LUVALID) {
1203                         ces->ces_flags |= CES_LUN_VALID;
1204                         ces->ces_scsi_lun =
1205                             desc->dt_or_obsolete.scsi_2.dt_scsi_flags &
1206                             READ_ELEMENT_STATUS_DT_LUNMASK;
1207                 }
1208         }
1209 }
1210
1211 static int
1212 chgetelemstatus(struct cam_periph *periph, int scsi_version, u_long cmd,
1213                 struct changer_element_status_request *cesr)
1214 {
1215         struct read_element_status_header *st_hdr;
1216         struct read_element_status_page_header *pg_hdr;
1217         struct read_element_status_descriptor *desc;
1218         caddr_t data = NULL;
1219         size_t size, desclen;
1220         int avail, i, error = 0;
1221         int curdata, dvcid, sense_flags;
1222         int try_no_dvcid = 0;
1223         struct changer_element_status *user_data = NULL;
1224         struct ch_softc *softc;
1225         union ccb *ccb;
1226         int chet = cesr->cesr_element_type;
1227         int want_voltags = (cesr->cesr_flags & CESR_VOLTAGS) ? 1 : 0;
1228
1229         softc = (struct ch_softc *)periph->softc;
1230
1231         /* perform argument checking */
1232
1233         /*
1234          * Perform a range check on the cesr_element_{base,count}
1235          * request argument fields.
1236          */
1237         if ((softc->sc_counts[chet] - cesr->cesr_element_base) <= 0
1238             || (cesr->cesr_element_base + cesr->cesr_element_count)
1239                 > softc->sc_counts[chet])
1240                 return (EINVAL);
1241
1242         /*
1243          * Request one descriptor for the given element type.  This
1244          * is used to determine the size of the descriptor so that
1245          * we can allocate enough storage for all of them.  We assume
1246          * that the first one can fit into 1k.
1247          */
1248         cam_periph_unlock(periph);
1249         data = (caddr_t)malloc(1024, M_DEVBUF, M_WAITOK);
1250
1251         cam_periph_lock(periph);
1252         ccb = cam_periph_getccb(periph, CAM_PRIORITY_NORMAL);
1253
1254         sense_flags = SF_RETRY_UA;
1255         if (softc->quirks & CH_Q_NO_DVCID) {
1256                 dvcid = 0;
1257                 curdata = 0;
1258         } else {
1259                 dvcid = 1;
1260                 curdata = 1;
1261                 /*
1262                  * Don't print anything for an Illegal Request, because
1263                  * these flags can cause some changers to complain.  We'll
1264                  * retry without them if we get an error.
1265                  */
1266                 sense_flags |= SF_QUIET_IR;
1267         }
1268
1269 retry_einval:
1270
1271         scsi_read_element_status(&ccb->csio,
1272                                  /* retries */ 1,
1273                                  /* cbfcnp */ chdone,
1274                                  /* tag_action */ MSG_SIMPLE_Q_TAG,
1275                                  /* voltag */ want_voltags,
1276                                  /* sea */ softc->sc_firsts[chet],
1277                                  /* curdata */ curdata,
1278                                  /* dvcid */ dvcid,
1279                                  /* count */ 1,
1280                                  /* data_ptr */ data,
1281                                  /* dxfer_len */ 1024,
1282                                  /* sense_len */ SSD_FULL_SIZE,
1283                                  /* timeout */ CH_TIMEOUT_READ_ELEMENT_STATUS);
1284
1285         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
1286                                   /*sense_flags*/ sense_flags,
1287                                   softc->device_stats);
1288
1289         /*
1290          * An Illegal Request sense key (only used if there is no asc/ascq)
1291          * or 0x24,0x00 for an ASC/ASCQ both map to EINVAL.  If dvcid or
1292          * curdata are set (we set both or neither), try turning them off
1293          * and see if the command is successful.
1294          */
1295         if ((error == EINVAL)
1296          && (dvcid || curdata))  {
1297                 dvcid = 0;
1298                 curdata = 0;
1299                 error = 0;
1300                 /* At this point we want to report any Illegal Request */
1301                 sense_flags &= ~SF_QUIET_IR;
1302                 try_no_dvcid = 1;
1303                 goto retry_einval;
1304         }
1305
1306         /*
1307          * In this case, we tried a read element status with dvcid and
1308          * curdata set, and it failed.  We retried without those bits, and
1309          * it succeeded.  Suggest to the user that he set a quirk, so we
1310          * don't go through the retry process the first time in the future.
1311          * This should only happen on changers that claim SCSI-3 or higher,
1312          * but don't support these bits.
1313          */
1314         if ((try_no_dvcid != 0)
1315          && (error == 0))
1316                 softc->quirks |= CH_Q_NO_DVCID;
1317
1318         if (error)
1319                 goto done;
1320         cam_periph_unlock(periph);
1321
1322         st_hdr = (struct read_element_status_header *)data;
1323         pg_hdr = (struct read_element_status_page_header *)((uintptr_t)st_hdr +
1324                   sizeof(struct read_element_status_header));
1325         desclen = scsi_2btoul(pg_hdr->edl);
1326
1327         size = sizeof(struct read_element_status_header) +
1328                sizeof(struct read_element_status_page_header) +
1329                (desclen * cesr->cesr_element_count);
1330         /*
1331          * Reallocate storage for descriptors and get them from the
1332          * device.
1333          */
1334         free(data, M_DEVBUF);
1335         data = (caddr_t)malloc(size, M_DEVBUF, M_WAITOK);
1336
1337         cam_periph_lock(periph);
1338         scsi_read_element_status(&ccb->csio,
1339                                  /* retries */ 1,
1340                                  /* cbfcnp */ chdone,
1341                                  /* tag_action */ MSG_SIMPLE_Q_TAG,
1342                                  /* voltag */ want_voltags,
1343                                  /* sea */ softc->sc_firsts[chet]
1344                                  + cesr->cesr_element_base,
1345                                  /* curdata */ curdata,
1346                                  /* dvcid */ dvcid,
1347                                  /* count */ cesr->cesr_element_count,
1348                                  /* data_ptr */ data,
1349                                  /* dxfer_len */ size,
1350                                  /* sense_len */ SSD_FULL_SIZE,
1351                                  /* timeout */ CH_TIMEOUT_READ_ELEMENT_STATUS);
1352
1353         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
1354                                   /*sense_flags*/ SF_RETRY_UA,
1355                                   softc->device_stats);
1356
1357         if (error)
1358                 goto done;
1359         cam_periph_unlock(periph);
1360
1361         /*
1362          * Fill in the user status array.
1363          */
1364         st_hdr = (struct read_element_status_header *)data;
1365         pg_hdr = (struct read_element_status_page_header *)((uintptr_t)st_hdr +
1366                   sizeof(struct read_element_status_header));
1367         avail = scsi_2btoul(st_hdr->count);
1368
1369         if (avail != cesr->cesr_element_count) {
1370                 xpt_print(periph->path,
1371                     "warning, READ ELEMENT STATUS avail != count\n");
1372         }
1373
1374         user_data = (struct changer_element_status *)
1375                 malloc(avail * sizeof(struct changer_element_status),
1376                        M_DEVBUF, M_WAITOK | M_ZERO);
1377
1378         desc = (struct read_element_status_descriptor *)((uintptr_t)data +
1379                 sizeof(struct read_element_status_header) +
1380                 sizeof(struct read_element_status_page_header));
1381         /*
1382          * Set up the individual element status structures
1383          */
1384         for (i = 0; i < avail; ++i) {
1385                 struct changer_element_status *ces;
1386
1387                 /*
1388                  * In the changer_element_status structure, fields from
1389                  * the beginning to the field of ces_scsi_lun are common
1390                  * between SCSI-2 and SCSI-3, while all the rest are new
1391                  * from SCSI-3. In order to maintain backward compatibility
1392                  * of the chio command, the ces pointer, below, is computed
1393                  * such that it lines up with the structure boundary
1394                  * corresponding to the SCSI version.
1395                  */
1396                 ces = cmd == OCHIOGSTATUS ?
1397                     (struct changer_element_status *)
1398                     ((unsigned char *)user_data + i *
1399                      (offsetof(struct changer_element_status,ces_scsi_lun)+1)):
1400                     &user_data[i];
1401
1402                 copy_element_status(softc, pg_hdr->flags, desc,
1403                                     ces, scsi_version);
1404
1405                 desc = (struct read_element_status_descriptor *)
1406                        ((unsigned char *)desc + desclen);
1407         }
1408
1409         /* Copy element status structures out to userspace. */
1410         if (cmd == OCHIOGSTATUS)
1411                 error = copyout(user_data,
1412                                 cesr->cesr_element_status,
1413                                 avail* (offsetof(struct changer_element_status,
1414                                 ces_scsi_lun) + 1));
1415         else
1416                 error = copyout(user_data,
1417                                 cesr->cesr_element_status,
1418                                 avail * sizeof(struct changer_element_status));
1419
1420         cam_periph_lock(periph);
1421
1422  done:
1423         xpt_release_ccb(ccb);
1424
1425         if (data != NULL)
1426                 free(data, M_DEVBUF);
1427         if (user_data != NULL)
1428                 free(user_data, M_DEVBUF);
1429
1430         return (error);
1431 }
1432
1433 static int
1434 chielem(struct cam_periph *periph,
1435         unsigned int timeout)
1436 {
1437         union ccb *ccb;
1438         struct ch_softc *softc;
1439         int error;
1440
1441         if (!timeout) {
1442                 timeout = CH_TIMEOUT_INITIALIZE_ELEMENT_STATUS;
1443         } else {
1444                 timeout *= 1000;
1445         }
1446
1447         error = 0;
1448         softc = (struct ch_softc *)periph->softc;
1449
1450         ccb = cam_periph_getccb(periph, CAM_PRIORITY_NORMAL);
1451
1452         scsi_initialize_element_status(&ccb->csio,
1453                                       /* retries */ 1,
1454                                       /* cbfcnp */ chdone,
1455                                       /* tag_action */ MSG_SIMPLE_Q_TAG,
1456                                       /* sense_len */ SSD_FULL_SIZE,
1457                                       /* timeout */ timeout);
1458
1459         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
1460                                   /*sense_flags*/ SF_RETRY_UA,
1461                                   softc->device_stats);
1462
1463         xpt_release_ccb(ccb);
1464
1465         return(error);
1466 }
1467
1468 static int
1469 chsetvoltag(struct cam_periph *periph,
1470             struct changer_set_voltag_request *csvr)
1471 {
1472         union ccb *ccb;
1473         struct ch_softc *softc;
1474         u_int16_t ea;
1475         u_int8_t sac;
1476         struct scsi_send_volume_tag_parameters ssvtp;
1477         int error;
1478         int i;
1479
1480         error = 0;
1481         softc = (struct ch_softc *)periph->softc;
1482
1483         bzero(&ssvtp, sizeof(ssvtp));
1484         for (i=0; i<sizeof(ssvtp.vitf); i++) {
1485                 ssvtp.vitf[i] = ' ';
1486         }
1487
1488         /*
1489          * Check arguments.
1490          */
1491         if (csvr->csvr_type > CHET_DT)
1492                 return EINVAL;
1493         if (csvr->csvr_addr > (softc->sc_counts[csvr->csvr_type] - 1))
1494                 return ENODEV;
1495
1496         ea = softc->sc_firsts[csvr->csvr_type] + csvr->csvr_addr;
1497
1498         if (csvr->csvr_flags & CSVR_ALTERNATE) {
1499                 switch (csvr->csvr_flags & CSVR_MODE_MASK) {
1500                 case CSVR_MODE_SET:
1501                         sac = SEND_VOLUME_TAG_ASSERT_ALTERNATE;
1502                         break;
1503                 case CSVR_MODE_REPLACE:
1504                         sac = SEND_VOLUME_TAG_REPLACE_ALTERNATE;
1505                         break;
1506                 case CSVR_MODE_CLEAR:
1507                         sac = SEND_VOLUME_TAG_UNDEFINED_ALTERNATE;
1508                         break;
1509                 default:
1510                         error = EINVAL;
1511                         goto out;
1512                 }
1513         } else {
1514                 switch (csvr->csvr_flags & CSVR_MODE_MASK) {
1515                 case CSVR_MODE_SET:
1516                         sac = SEND_VOLUME_TAG_ASSERT_PRIMARY;
1517                         break;
1518                 case CSVR_MODE_REPLACE:
1519                         sac = SEND_VOLUME_TAG_REPLACE_PRIMARY;
1520                         break;
1521                 case CSVR_MODE_CLEAR:
1522                         sac = SEND_VOLUME_TAG_UNDEFINED_PRIMARY;
1523                         break;
1524                 default:
1525                         error = EINVAL;
1526                         goto out;
1527                 }
1528         }
1529
1530         memcpy(ssvtp.vitf, csvr->csvr_voltag.cv_volid,
1531                min(strlen(csvr->csvr_voltag.cv_volid), sizeof(ssvtp.vitf)));
1532         scsi_ulto2b(csvr->csvr_voltag.cv_serial, ssvtp.minvsn);
1533
1534         ccb = cam_periph_getccb(periph, CAM_PRIORITY_NORMAL);
1535
1536         scsi_send_volume_tag(&ccb->csio,
1537                              /* retries */ 1,
1538                              /* cbfcnp */ chdone,
1539                              /* tag_action */ MSG_SIMPLE_Q_TAG,
1540                              /* element_address */ ea,
1541                              /* send_action_code */ sac,
1542                              /* parameters */ &ssvtp,
1543                              /* sense_len */ SSD_FULL_SIZE,
1544                              /* timeout */ CH_TIMEOUT_SEND_VOLTAG);
1545
1546         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
1547                                   /*sense_flags*/ SF_RETRY_UA,
1548                                   softc->device_stats);
1549
1550         xpt_release_ccb(ccb);
1551
1552  out:
1553         return error;
1554 }
1555
1556 static int
1557 chgetparams(struct cam_periph *periph)
1558 {
1559         union ccb *ccb;
1560         struct ch_softc *softc;
1561         void *mode_buffer;
1562         int mode_buffer_len;
1563         struct page_element_address_assignment *ea;
1564         struct page_device_capabilities *cap;
1565         int error, from, dbd;
1566         u_int8_t *moves, *exchanges;
1567
1568         error = 0;
1569
1570         softc = (struct ch_softc *)periph->softc;
1571
1572         ccb = cam_periph_getccb(periph, CAM_PRIORITY_NORMAL);
1573
1574         /*
1575          * The scsi_mode_sense_data structure is just a convenience
1576          * structure that allows us to easily calculate the worst-case
1577          * storage size of the mode sense buffer.
1578          */
1579         mode_buffer_len = sizeof(struct scsi_mode_sense_data);
1580
1581         mode_buffer = malloc(mode_buffer_len, M_SCSICH, M_NOWAIT);
1582
1583         if (mode_buffer == NULL) {
1584                 printf("chgetparams: couldn't malloc mode sense data\n");
1585                 return(ENOSPC);
1586         }
1587
1588         bzero(mode_buffer, mode_buffer_len);
1589
1590         if (softc->quirks & CH_Q_NO_DBD)
1591                 dbd = FALSE;
1592         else
1593                 dbd = TRUE;
1594
1595         /*
1596          * Get the element address assignment page.
1597          */
1598         scsi_mode_sense(&ccb->csio,
1599                         /* retries */ 1,
1600                         /* cbfcnp */ chdone,
1601                         /* tag_action */ MSG_SIMPLE_Q_TAG,
1602                         /* dbd */ dbd,
1603                         /* page_code */ SMS_PAGE_CTRL_CURRENT,
1604                         /* page */ CH_ELEMENT_ADDR_ASSIGN_PAGE,
1605                         /* param_buf */ (u_int8_t *)mode_buffer,
1606                         /* param_len */ mode_buffer_len,
1607                         /* sense_len */ SSD_FULL_SIZE,
1608                         /* timeout */ CH_TIMEOUT_MODE_SENSE);
1609
1610         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
1611                                   /* sense_flags */ SF_RETRY_UA|SF_NO_PRINT,
1612                                   softc->device_stats);
1613
1614         if (error) {
1615                 if (dbd) {
1616                         struct scsi_mode_sense_6 *sms;
1617
1618                         sms = (struct scsi_mode_sense_6 *)
1619                                 ccb->csio.cdb_io.cdb_bytes;
1620
1621                         sms->byte2 &= ~SMS_DBD;
1622                         error = cam_periph_runccb(ccb, cherror,
1623                                                   /*cam_flags*/ CAM_RETRY_SELTO,
1624                                                   /*sense_flags*/ SF_RETRY_UA,
1625                                                   softc->device_stats);
1626                 } else {
1627                         /*
1628                          * Since we disabled sense printing above, print
1629                          * out the sense here since we got an error.
1630                          */
1631                         scsi_sense_print(&ccb->csio);
1632                 }
1633
1634                 if (error) {
1635                         xpt_print(periph->path,
1636                             "chgetparams: error getting element "
1637                             "address page\n");
1638                         xpt_release_ccb(ccb);
1639                         free(mode_buffer, M_SCSICH);
1640                         return(error);
1641                 }
1642         }
1643
1644         ea = (struct page_element_address_assignment *)
1645                 find_mode_page_6((struct scsi_mode_header_6 *)mode_buffer);
1646
1647         softc->sc_firsts[CHET_MT] = scsi_2btoul(ea->mtea);
1648         softc->sc_counts[CHET_MT] = scsi_2btoul(ea->nmte);
1649         softc->sc_firsts[CHET_ST] = scsi_2btoul(ea->fsea);
1650         softc->sc_counts[CHET_ST] = scsi_2btoul(ea->nse);
1651         softc->sc_firsts[CHET_IE] = scsi_2btoul(ea->fieea);
1652         softc->sc_counts[CHET_IE] = scsi_2btoul(ea->niee);
1653         softc->sc_firsts[CHET_DT] = scsi_2btoul(ea->fdtea);
1654         softc->sc_counts[CHET_DT] = scsi_2btoul(ea->ndte);
1655
1656         bzero(mode_buffer, mode_buffer_len);
1657
1658         /*
1659          * Now get the device capabilities page.
1660          */
1661         scsi_mode_sense(&ccb->csio,
1662                         /* retries */ 1,
1663                         /* cbfcnp */ chdone,
1664                         /* tag_action */ MSG_SIMPLE_Q_TAG,
1665                         /* dbd */ dbd,
1666                         /* page_code */ SMS_PAGE_CTRL_CURRENT,
1667                         /* page */ CH_DEVICE_CAP_PAGE,
1668                         /* param_buf */ (u_int8_t *)mode_buffer,
1669                         /* param_len */ mode_buffer_len,
1670                         /* sense_len */ SSD_FULL_SIZE,
1671                         /* timeout */ CH_TIMEOUT_MODE_SENSE);
1672
1673         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
1674                                   /* sense_flags */ SF_RETRY_UA | SF_NO_PRINT,
1675                                   softc->device_stats);
1676
1677         if (error) {
1678                 if (dbd) {
1679                         struct scsi_mode_sense_6 *sms;
1680
1681                         sms = (struct scsi_mode_sense_6 *)
1682                                 ccb->csio.cdb_io.cdb_bytes;
1683
1684                         sms->byte2 &= ~SMS_DBD;
1685                         error = cam_periph_runccb(ccb, cherror,
1686                                                   /*cam_flags*/ CAM_RETRY_SELTO,
1687                                                   /*sense_flags*/ SF_RETRY_UA,
1688                                                   softc->device_stats);
1689                 } else {
1690                         /*
1691                          * Since we disabled sense printing above, print
1692                          * out the sense here since we got an error.
1693                          */
1694                         scsi_sense_print(&ccb->csio);
1695                 }
1696
1697                 if (error) {
1698                         xpt_print(periph->path,
1699                             "chgetparams: error getting device "
1700                             "capabilities page\n");
1701                         xpt_release_ccb(ccb);
1702                         free(mode_buffer, M_SCSICH);
1703                         return(error);
1704                 }
1705         }
1706
1707         xpt_release_ccb(ccb);
1708
1709         cap = (struct page_device_capabilities *)
1710                 find_mode_page_6((struct scsi_mode_header_6 *)mode_buffer);
1711
1712         bzero(softc->sc_movemask, sizeof(softc->sc_movemask));
1713         bzero(softc->sc_exchangemask, sizeof(softc->sc_exchangemask));
1714         moves = cap->move_from;
1715         exchanges = cap->exchange_with;
1716         for (from = CHET_MT; from <= CHET_MAX; ++from) {
1717                 softc->sc_movemask[from] = moves[from];
1718                 softc->sc_exchangemask[from] = exchanges[from];
1719         }
1720
1721         free(mode_buffer, M_SCSICH);
1722
1723         return(error);
1724 }
1725
1726 static int
1727 chscsiversion(struct cam_periph *periph)
1728 {
1729         struct scsi_inquiry_data *inq_data;
1730         struct ccb_getdev *cgd;
1731         int dev_scsi_version;
1732         struct cam_sim *sim;
1733
1734         sim = xpt_path_sim(periph->path);
1735         mtx_assert(sim->mtx, MA_OWNED);
1736         if ((cgd = (struct ccb_getdev *)xpt_alloc_ccb_nowait()) == NULL)
1737                 return (-1);
1738         /*
1739          * Get the device information.
1740          */
1741         xpt_setup_ccb(&cgd->ccb_h,
1742                       periph->path,
1743                       CAM_PRIORITY_NORMAL);
1744         cgd->ccb_h.func_code = XPT_GDEV_TYPE;
1745         xpt_action((union ccb *)cgd);
1746
1747         if (cgd->ccb_h.status != CAM_REQ_CMP) {
1748                 xpt_free_ccb((union ccb *)cgd);
1749                 return -1;
1750         }
1751
1752         inq_data = &cgd->inq_data;
1753         dev_scsi_version = inq_data->version;
1754         xpt_free_ccb((union ccb *)cgd);
1755
1756         return dev_scsi_version;
1757 }
1758
1759 void
1760 scsi_move_medium(struct ccb_scsiio *csio, u_int32_t retries,
1761                  void (*cbfcnp)(struct cam_periph *, union ccb *),
1762                  u_int8_t tag_action, u_int32_t tea, u_int32_t src,
1763                  u_int32_t dst, int invert, u_int8_t sense_len,
1764                  u_int32_t timeout)
1765 {
1766         struct scsi_move_medium *scsi_cmd;
1767
1768         scsi_cmd = (struct scsi_move_medium *)&csio->cdb_io.cdb_bytes;
1769         bzero(scsi_cmd, sizeof(*scsi_cmd));
1770
1771         scsi_cmd->opcode = MOVE_MEDIUM;
1772
1773         scsi_ulto2b(tea, scsi_cmd->tea);
1774         scsi_ulto2b(src, scsi_cmd->src);
1775         scsi_ulto2b(dst, scsi_cmd->dst);
1776
1777         if (invert)
1778                 scsi_cmd->invert |= MOVE_MEDIUM_INVERT;
1779
1780         cam_fill_csio(csio,
1781                       retries,
1782                       cbfcnp,
1783                       /*flags*/ CAM_DIR_NONE,
1784                       tag_action,
1785                       /*data_ptr*/ NULL,
1786                       /*dxfer_len*/ 0,
1787                       sense_len,
1788                       sizeof(*scsi_cmd),
1789                       timeout);
1790 }
1791
1792 void
1793 scsi_exchange_medium(struct ccb_scsiio *csio, u_int32_t retries,
1794                      void (*cbfcnp)(struct cam_periph *, union ccb *),
1795                      u_int8_t tag_action, u_int32_t tea, u_int32_t src,
1796                      u_int32_t dst1, u_int32_t dst2, int invert1,
1797                      int invert2, u_int8_t sense_len, u_int32_t timeout)
1798 {
1799         struct scsi_exchange_medium *scsi_cmd;
1800
1801         scsi_cmd = (struct scsi_exchange_medium *)&csio->cdb_io.cdb_bytes;
1802         bzero(scsi_cmd, sizeof(*scsi_cmd));
1803
1804         scsi_cmd->opcode = EXCHANGE_MEDIUM;
1805
1806         scsi_ulto2b(tea, scsi_cmd->tea);
1807         scsi_ulto2b(src, scsi_cmd->src);
1808         scsi_ulto2b(dst1, scsi_cmd->fdst);
1809         scsi_ulto2b(dst2, scsi_cmd->sdst);
1810
1811         if (invert1)
1812                 scsi_cmd->invert |= EXCHANGE_MEDIUM_INV1;
1813
1814         if (invert2)
1815                 scsi_cmd->invert |= EXCHANGE_MEDIUM_INV2;
1816
1817         cam_fill_csio(csio,
1818                       retries,
1819                       cbfcnp,
1820                       /*flags*/ CAM_DIR_NONE,
1821                       tag_action,
1822                       /*data_ptr*/ NULL,
1823                       /*dxfer_len*/ 0,
1824                       sense_len,
1825                       sizeof(*scsi_cmd),
1826                       timeout);
1827 }
1828
1829 void
1830 scsi_position_to_element(struct ccb_scsiio *csio, u_int32_t retries,
1831                          void (*cbfcnp)(struct cam_periph *, union ccb *),
1832                          u_int8_t tag_action, u_int32_t tea, u_int32_t dst,
1833                          int invert, u_int8_t sense_len, u_int32_t timeout)
1834 {
1835         struct scsi_position_to_element *scsi_cmd;
1836
1837         scsi_cmd = (struct scsi_position_to_element *)&csio->cdb_io.cdb_bytes;
1838         bzero(scsi_cmd, sizeof(*scsi_cmd));
1839
1840         scsi_cmd->opcode = POSITION_TO_ELEMENT;
1841
1842         scsi_ulto2b(tea, scsi_cmd->tea);
1843         scsi_ulto2b(dst, scsi_cmd->dst);
1844
1845         if (invert)
1846                 scsi_cmd->invert |= POSITION_TO_ELEMENT_INVERT;
1847
1848         cam_fill_csio(csio,
1849                       retries,
1850                       cbfcnp,
1851                       /*flags*/ CAM_DIR_NONE,
1852                       tag_action,
1853                       /*data_ptr*/ NULL,
1854                       /*dxfer_len*/ 0,
1855                       sense_len,
1856                       sizeof(*scsi_cmd),
1857                       timeout);
1858 }
1859
1860 void
1861 scsi_read_element_status(struct ccb_scsiio *csio, u_int32_t retries,
1862                          void (*cbfcnp)(struct cam_periph *, union ccb *),
1863                          u_int8_t tag_action, int voltag, u_int32_t sea,
1864                          int curdata, int dvcid,
1865                          u_int32_t count, u_int8_t *data_ptr,
1866                          u_int32_t dxfer_len, u_int8_t sense_len,
1867                          u_int32_t timeout)
1868 {
1869         struct scsi_read_element_status *scsi_cmd;
1870
1871         scsi_cmd = (struct scsi_read_element_status *)&csio->cdb_io.cdb_bytes;
1872         bzero(scsi_cmd, sizeof(*scsi_cmd));
1873
1874         scsi_cmd->opcode = READ_ELEMENT_STATUS;
1875
1876         scsi_ulto2b(sea, scsi_cmd->sea);
1877         scsi_ulto2b(count, scsi_cmd->count);
1878         scsi_ulto3b(dxfer_len, scsi_cmd->len);
1879         if (dvcid)
1880                 scsi_cmd->flags |= READ_ELEMENT_STATUS_DVCID;
1881         if (curdata)
1882                 scsi_cmd->flags |= READ_ELEMENT_STATUS_CURDATA;
1883
1884         if (voltag)
1885                 scsi_cmd->byte2 |= READ_ELEMENT_STATUS_VOLTAG;
1886
1887         cam_fill_csio(csio,
1888                       retries,
1889                       cbfcnp,
1890                       /*flags*/ CAM_DIR_IN,
1891                       tag_action,
1892                       data_ptr,
1893                       dxfer_len,
1894                       sense_len,
1895                       sizeof(*scsi_cmd),
1896                       timeout);
1897 }
1898
1899 void
1900 scsi_initialize_element_status(struct ccb_scsiio *csio, u_int32_t retries,
1901                                void (*cbfcnp)(struct cam_periph *, union ccb *),
1902                                u_int8_t tag_action, u_int8_t sense_len,
1903                                u_int32_t timeout)
1904 {
1905         struct scsi_initialize_element_status *scsi_cmd;
1906
1907         scsi_cmd = (struct scsi_initialize_element_status *)
1908                     &csio->cdb_io.cdb_bytes;
1909         bzero(scsi_cmd, sizeof(*scsi_cmd));
1910
1911         scsi_cmd->opcode = INITIALIZE_ELEMENT_STATUS;
1912
1913         cam_fill_csio(csio,
1914                       retries,
1915                       cbfcnp,
1916                       /*flags*/ CAM_DIR_NONE,
1917                       tag_action,
1918                       /* data_ptr */ NULL,
1919                       /* dxfer_len */ 0,
1920                       sense_len,
1921                       sizeof(*scsi_cmd),
1922                       timeout);
1923 }
1924
1925 void
1926 scsi_send_volume_tag(struct ccb_scsiio *csio, u_int32_t retries,
1927                      void (*cbfcnp)(struct cam_periph *, union ccb *),
1928                      u_int8_t tag_action,
1929                      u_int16_t element_address,
1930                      u_int8_t send_action_code,
1931                      struct scsi_send_volume_tag_parameters *parameters,
1932                      u_int8_t sense_len, u_int32_t timeout)
1933 {
1934         struct scsi_send_volume_tag *scsi_cmd;
1935
1936         scsi_cmd = (struct scsi_send_volume_tag *) &csio->cdb_io.cdb_bytes;
1937         bzero(scsi_cmd, sizeof(*scsi_cmd));
1938
1939         scsi_cmd->opcode = SEND_VOLUME_TAG;
1940         scsi_ulto2b(element_address, scsi_cmd->ea);
1941         scsi_cmd->sac = send_action_code;
1942         scsi_ulto2b(sizeof(*parameters), scsi_cmd->pll);
1943
1944         cam_fill_csio(csio,
1945                       retries,
1946                       cbfcnp,
1947                       /*flags*/ CAM_DIR_OUT,
1948                       tag_action,
1949                       /* data_ptr */ (u_int8_t *) parameters,
1950                       sizeof(*parameters),
1951                       sense_len,
1952                       sizeof(*scsi_cmd),
1953                       timeout);
1954 }