sys/cam/scsi/scsi_ch.c

   1 /*-
   2  * Copyright (c) 1997 Justin T. Gibbs.
   3  * Copyright (c) 1997, 1998, 1999 Kenneth D. Merry.
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions, and the following disclaimer,
  11  *    without modification, immediately at the beginning of the file.
  12  * 2. The name of the author may not be used to endorse or promote products
  13  *    derived from this software without specific prior written permission.
  14  *
  15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  18  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
  19  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  25  * SUCH DAMAGE.
  26  */
  27
  28 /*
  29  * Derived from the NetBSD SCSI changer driver.
  30  *
  31  *      $NetBSD: ch.c,v 1.32 1998/01/12 09:49:12 thorpej Exp $
  32  *
  33  */
  34 /*-
  35  * Copyright (c) 1996, 1997 Jason R. Thorpe <thorpej@and.com>
  36  * All rights reserved.
  37  *
  38  * Partially based on an autochanger driver written by Stefan Grefen
  39  * and on an autochanger driver written by the Systems Programming Group
  40  * at the University of Utah Computer Science Department.
  41  *
  42  * Redistribution and use in source and binary forms, with or without
  43  * modification, are permitted provided that the following conditions
  44  * are met:
  45  * 1. Redistributions of source code must retain the above copyright
  46  *    notice, this list of conditions and the following disclaimer.
  47  * 2. Redistributions in binary form must reproduce the above copyright
  48  *    notice, this list of conditions and the following disclaimer in the
  49  *    documentation and/or other materials provided with the distribution.
  50  * 3. All advertising materials mentioning features or use of this software
  51  *    must display the following acknowledgements:
  52  *      This product includes software developed by Jason R. Thorpe
  53  *      for And Communications, http://www.and.com/
  54  * 4. The name of the author may not be used to endorse or promote products
  55  *    derived from this software without specific prior written permission.
  56  *
  57  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  58  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  59  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  60  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  61  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
  62  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  63  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  64  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  65  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  66  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  67  * SUCH DAMAGE.
  68  */
  69
  70 #include <sys/cdefs.h>
  71 __FBSDID("$FreeBSD$");
  72
  73 #include <sys/param.h>
  74 #include <sys/queue.h>
  75 #include <sys/systm.h>
  76 #include <sys/kernel.h>
  77 #include <sys/types.h>
  78 #include <sys/malloc.h>
  79 #include <sys/fcntl.h>
  80 #include <sys/conf.h>
  81 #include <sys/chio.h>
  82 #include <sys/errno.h>
  83 #include <sys/devicestat.h>
  84
  85 #include <cam/cam.h>
  86 #include <cam/cam_ccb.h>
  87 #include <cam/cam_periph.h>
  88 #include <cam/cam_xpt_periph.h>
  89 #include <cam/cam_debug.h>
  90
  91 #include <cam/scsi/scsi_all.h>
  92 #include <cam/scsi/scsi_message.h>
  93 #include <cam/scsi/scsi_ch.h>
  94
  95 /*
  96  * Timeout definitions for various changer related commands.  They may
  97  * be too short for some devices (especially the timeout for INITIALIZE
  98  * ELEMENT STATUS).
  99  */
 100
 101 static const u_int32_t  CH_TIMEOUT_MODE_SENSE                = 6000;
 102 static const u_int32_t  CH_TIMEOUT_MOVE_MEDIUM               = 15 * 60 * 1000;
 103 static const u_int32_t  CH_TIMEOUT_EXCHANGE_MEDIUM           = 15 * 60 * 1000;
 104 static const u_int32_t  CH_TIMEOUT_POSITION_TO_ELEMENT       = 15 * 60 * 1000;
 105 static const u_int32_t  CH_TIMEOUT_READ_ELEMENT_STATUS       = 5 * 60 * 1000;
 106 static const u_int32_t  CH_TIMEOUT_SEND_VOLTAG               = 10000;
 107 static const u_int32_t  CH_TIMEOUT_INITIALIZE_ELEMENT_STATUS = 500000;
 108
 109 typedef enum {
 110         CH_FLAG_INVALID         = 0x001
 111 } ch_flags;
 112
 113 typedef enum {
 114         CH_STATE_PROBE,
 115         CH_STATE_NORMAL
 116 } ch_state;
 117
 118 typedef enum {
 119         CH_CCB_PROBE
 120 } ch_ccb_types;
 121
 122 typedef enum {
 123         CH_Q_NONE       = 0x00,
 124         CH_Q_NO_DBD     = 0x01,
 125         CH_Q_NO_DVCID   = 0x02
 126 } ch_quirks;
 127
 128 #define CH_Q_BIT_STRING \
 129         "\020"          \
 130         "\001NO_DBD"    \
 131         "\002NO_DVCID"
 132
 133 #define ccb_state       ppriv_field0
 134 #define ccb_bp          ppriv_ptr1
 135
 136 struct scsi_mode_sense_data {
 137         struct scsi_mode_header_6 header;
 138         struct scsi_mode_blk_desc blk_desc;
 139         union {
 140                 struct page_element_address_assignment ea;
 141                 struct page_transport_geometry_parameters tg;
 142                 struct page_device_capabilities cap;
 143         } pages;
 144 };
 145
 146 struct ch_softc {
 147         ch_flags        flags;
 148         ch_state        state;
 149         ch_quirks       quirks;
 150         union ccb       saved_ccb;
 151         struct devstat  *device_stats;
 152         struct cdev     *dev;
 153         int             open_count;
 154
 155         int             sc_picker;      /* current picker */
 156
 157         /*
 158          * The following information is obtained from the
 159          * element address assignment page.
 160          */
 161         int             sc_firsts[CHET_MAX + 1];        /* firsts */
 162         int             sc_counts[CHET_MAX + 1];        /* counts */
 163
 164         /*
 165          * The following mask defines the legal combinations
 166          * of elements for the MOVE MEDIUM command.
 167          */
 168         u_int8_t        sc_movemask[CHET_MAX + 1];
 169
 170         /*
 171          * As above, but for EXCHANGE MEDIUM.
 172          */
 173         u_int8_t        sc_exchangemask[CHET_MAX + 1];
 174
 175         /*
 176          * Quirks; see below.  XXX KDM not implemented yet
 177          */
 178         int             sc_settledelay; /* delay for settle */
 179 };
 180
 181 static  d_open_t        chopen;
 182 static  d_close_t       chclose;
 183 static  d_ioctl_t       chioctl;
 184 static  periph_init_t   chinit;
 185 static  periph_ctor_t   chregister;
 186 static  periph_oninv_t  choninvalidate;
 187 static  periph_dtor_t   chcleanup;
 188 static  periph_start_t  chstart;
 189 static  void            chasync(void *callback_arg, u_int32_t code,
 190                                 struct cam_path *path, void *arg);
 191 static  void            chdone(struct cam_periph *periph,
 192                                union ccb *done_ccb);
 193 static  int             cherror(union ccb *ccb, u_int32_t cam_flags,
 194                                 u_int32_t sense_flags);
 195 static  int             chmove(struct cam_periph *periph,
 196                                struct changer_move *cm);
 197 static  int             chexchange(struct cam_periph *periph,
 198                                    struct changer_exchange *ce);
 199 static  int             chposition(struct cam_periph *periph,
 200                                    struct changer_position *cp);
 201 static  int             chgetelemstatus(struct cam_periph *periph,
 202                                 int scsi_version, u_long cmd,
 203                                 struct changer_element_status_request *csr);
 204 static  int             chsetvoltag(struct cam_periph *periph,
 205                                     struct changer_set_voltag_request *csvr);
 206 static  int             chielem(struct cam_periph *periph,
 207                                 unsigned int timeout);
 208 static  int             chgetparams(struct cam_periph *periph);
 209 static  int             chscsiversion(struct cam_periph *periph);
 210
 211 static struct periph_driver chdriver =
 212 {
 213         chinit, "ch",
 214         TAILQ_HEAD_INITIALIZER(chdriver.units), /* generation */ 0
 215 };
 216
 217 PERIPHDRIVER_DECLARE(ch, chdriver);
 218
 219 static struct cdevsw ch_cdevsw = {
 220         .d_version =    D_VERSION,
 221         .d_flags =      D_TRACKCLOSE,
 222         .d_open =       chopen,
 223         .d_close =      chclose,
 224         .d_ioctl =      chioctl,
 225         .d_name =       "ch",
 226 };
 227
 228 static MALLOC_DEFINE(M_SCSICH, "scsi_ch", "scsi_ch buffers");
 229
 230 static void
 231 chinit(void)
 232 {
 233         cam_status status;
 234
 235         /*
 236          * Install a global async callback.  This callback will
 237          * receive async callbacks like "new device found".
 238          */
 239         status = xpt_register_async(AC_FOUND_DEVICE, chasync, NULL, NULL);
 240
 241         if (status != CAM_REQ_CMP) {
 242                 printf("ch: Failed to attach master async callback "
 243                        "due to status 0x%x!\n", status);
 244         }
 245 }
 246
 247 static void
 248 chdevgonecb(void *arg)
 249 {
 250         struct ch_softc   *softc;
 251         struct cam_periph *periph;
 252         struct mtx *mtx;
 253         int i;
 254
 255         periph = (struct cam_periph *)arg;
 256         mtx = cam_periph_mtx(periph);
 257         mtx_lock(mtx);
 258
 259         softc = (struct ch_softc *)periph->softc;
 260         KASSERT(softc->open_count >= 0, ("Negative open count %d",
 261                 softc->open_count));
 262
 263         /*
 264          * When we get this callback, we will get no more close calls from
 265          * devfs.  So if we have any dangling opens, we need to release the
 266          * reference held for that particular context.
 267          */
 268         for (i = 0; i < softc->open_count; i++)
 269                 cam_periph_release_locked(periph);
 270
 271         softc->open_count = 0;
 272
 273         /*
 274          * Release the reference held for the device node, it is gone now.
 275          */
 276         cam_periph_release_locked(periph);
 277
 278         /*
 279          * We reference the lock directly here, instead of using
 280          * cam_periph_unlock().  The reason is that the final call to
 281          * cam_periph_release_locked() above could result in the periph
 282          * getting freed.  If that is the case, dereferencing the periph
 283          * with a cam_periph_unlock() call would cause a page fault.
 284          */
 285         mtx_unlock(mtx);
 286 }
 287
 288 static void
 289 choninvalidate(struct cam_periph *periph)
 290 {
 291         struct ch_softc *softc;
 292
 293         softc = (struct ch_softc *)periph->softc;
 294
 295         /*
 296          * De-register any async callbacks.
 297          */
 298         xpt_register_async(0, chasync, periph, periph->path);
 299
 300         softc->flags |= CH_FLAG_INVALID;
 301
 302         /*
 303          * Tell devfs this device has gone away, and ask for a callback
 304          * when it has cleaned up its state.
 305          */
 306         destroy_dev_sched_cb(softc->dev, chdevgonecb, periph);
 307 }
 308
 309 static void
 310 chcleanup(struct cam_periph *periph)
 311 {
 312         struct ch_softc *softc;
 313
 314         softc = (struct ch_softc *)periph->softc;
 315
 316         devstat_remove_entry(softc->device_stats);
 317
 318         free(softc, M_DEVBUF);
 319 }
 320
 321 static void
 322 chasync(void *callback_arg, u_int32_t code, struct cam_path *path, void *arg)
 323 {
 324         struct cam_periph *periph;
 325
 326         periph = (struct cam_periph *)callback_arg;
 327
 328         switch(code) {
 329         case AC_FOUND_DEVICE:
 330         {
 331                 struct ccb_getdev *cgd;
 332                 cam_status status;
 333
 334                 cgd = (struct ccb_getdev *)arg;
 335                 if (cgd == NULL)
 336                         break;
 337
 338                 if (cgd->protocol != PROTO_SCSI)
 339                         break;
 340
 341                 if (SID_TYPE(&cgd->inq_data)!= T_CHANGER)
 342                         break;
 343
 344                 /*
 345                  * Allocate a peripheral instance for
 346                  * this device and start the probe
 347                  * process.
 348                  */
 349                 status = cam_periph_alloc(chregister, choninvalidate,
 350                                           chcleanup, chstart, "ch",
 351                                           CAM_PERIPH_BIO, path,
 352                                           chasync, AC_FOUND_DEVICE, cgd);
 353
 354                 if (status != CAM_REQ_CMP
 355                  && status != CAM_REQ_INPROG)
 356                         printf("chasync: Unable to probe new device "
 357                                "due to status 0x%x\n", status);
 358
 359                 break;
 360
 361         }
 362         default:
 363                 cam_periph_async(periph, code, path, arg);
 364                 break;
 365         }
 366 }
 367
 368 static cam_status
 369 chregister(struct cam_periph *periph, void *arg)
 370 {
 371         struct ch_softc *softc;
 372         struct ccb_getdev *cgd;
 373         struct ccb_pathinq cpi;
 374
 375         cgd = (struct ccb_getdev *)arg;
 376         if (cgd == NULL) {
 377                 printf("chregister: no getdev CCB, can't register device\n");
 378                 return(CAM_REQ_CMP_ERR);
 379         }
 380
 381         softc = (struct ch_softc *)malloc(sizeof(*softc),M_DEVBUF,M_NOWAIT);
 382
 383         if (softc == NULL) {
 384                 printf("chregister: Unable to probe new device. "
 385                        "Unable to allocate softc\n");
 386                 return(CAM_REQ_CMP_ERR);
 387         }
 388
 389         bzero(softc, sizeof(*softc));
 390         softc->state = CH_STATE_PROBE;
 391         periph->softc = softc;
 392         softc->quirks = CH_Q_NONE;
 393
 394         /*
 395          * The DVCID and CURDATA bits were not introduced until the SMC
 396          * spec.  If this device claims SCSI-2 or earlier support, then it
 397          * very likely does not support these bits.
 398          */
 399         if (cgd->inq_data.version <= SCSI_REV_2)
 400                 softc->quirks |= CH_Q_NO_DVCID;
 401
 402         bzero(&cpi, sizeof(cpi));
 403         xpt_setup_ccb(&cpi.ccb_h, periph->path, CAM_PRIORITY_NORMAL);
 404         cpi.ccb_h.func_code = XPT_PATH_INQ;
 405         xpt_action((union ccb *)&cpi);
 406
 407         /*
 408          * Changers don't have a blocksize, and obviously don't support
 409          * tagged queueing.
 410          */
 411         cam_periph_unlock(periph);
 412         softc->device_stats = devstat_new_entry("ch",
 413                           periph->unit_number, 0,
 414                           DEVSTAT_NO_BLOCKSIZE | DEVSTAT_NO_ORDERED_TAGS,
 415                           SID_TYPE(&cgd->inq_data) |
 416                           XPORT_DEVSTAT_TYPE(cpi.transport),
 417                           DEVSTAT_PRIORITY_OTHER);
 418
 419         /*
 420          * Acquire a reference to the periph before we create the devfs
 421          * instance for it.  We'll release this reference once the devfs
 422          * instance has been freed.
 423          */
 424         if (cam_periph_acquire(periph) != CAM_REQ_CMP) {
 425                 xpt_print(periph->path, "%s: lost periph during "
 426                           "registration!\n", __func__);
 427                 cam_periph_lock(periph);
 428                 return (CAM_REQ_CMP_ERR);
 429         }
 430
 431
 432         /* Register the device */
 433         softc->dev = make_dev(&ch_cdevsw, periph->unit_number, UID_ROOT,
 434                               GID_OPERATOR, 0600, "%s%d", periph->periph_name,
 435                               periph->unit_number);
 436         cam_periph_lock(periph);
 437         softc->dev->si_drv1 = periph;
 438
 439         /*
 440          * Add an async callback so that we get
 441          * notified if this device goes away.
 442          */
 443         xpt_register_async(AC_LOST_DEVICE, chasync, periph, periph->path);
 444
 445         /*
 446          * Lock this periph until we are setup.
 447          * This first call can't block
 448          */
 449         (void)cam_periph_hold(periph, PRIBIO);
 450         xpt_schedule(periph, CAM_PRIORITY_DEV);
 451
 452         return(CAM_REQ_CMP);
 453 }
 454
 455 static int
 456 chopen(struct cdev *dev, int flags, int fmt, struct thread *td)
 457 {
 458         struct cam_periph *periph;
 459         struct ch_softc *softc;
 460         int error;
 461
 462         periph = (struct cam_periph *)dev->si_drv1;
 463         if (cam_periph_acquire(periph) != CAM_REQ_CMP)
 464                 return (ENXIO);
 465
 466         softc = (struct ch_softc *)periph->softc;
 467
 468         cam_periph_lock(periph);
 469
 470         if (softc->flags & CH_FLAG_INVALID) {
 471                 cam_periph_release_locked(periph);
 472                 cam_periph_unlock(periph);
 473                 return(ENXIO);
 474         }
 475
 476         if ((error = cam_periph_hold(periph, PRIBIO | PCATCH)) != 0) {
 477                 cam_periph_unlock(periph);
 478                 cam_periph_release(periph);
 479                 return (error);
 480         }
 481
 482         /*
 483          * Load information about this changer device into the softc.
 484          */
 485         if ((error = chgetparams(periph)) != 0) {
 486                 cam_periph_unhold(periph);
 487                 cam_periph_release_locked(periph);
 488                 cam_periph_unlock(periph);
 489                 return(error);
 490         }
 491
 492         cam_periph_unhold(periph);
 493
 494         softc->open_count++;
 495
 496         cam_periph_unlock(periph);
 497
 498         return(error);
 499 }
 500
 501 static int
 502 chclose(struct cdev *dev, int flag, int fmt, struct thread *td)
 503 {
 504         struct  cam_periph *periph;
 505         struct  ch_softc *softc;
 506         struct mtx *mtx;
 507
 508         periph = (struct cam_periph *)dev->si_drv1;
 509         if (periph == NULL)
 510                 return(ENXIO);
 511         mtx = cam_periph_mtx(periph);
 512         mtx_lock(mtx);
 513
 514         softc = (struct ch_softc *)periph->softc;
 515         softc->open_count--;
 516
 517         cam_periph_release_locked(periph);
 518
 519         /*
 520          * We reference the lock directly here, instead of using
 521          * cam_periph_unlock().  The reason is that the call to
 522          * cam_periph_release_locked() above could result in the periph
 523          * getting freed.  If that is the case, dereferencing the periph
 524          * with a cam_periph_unlock() call would cause a page fault.
 525          *
 526          * cam_periph_release() avoids this problem using the same method,
 527          * but we're manually acquiring and dropping the lock here to
 528          * protect the open count and avoid another lock acquisition and
 529          * release.
 530          */
 531         mtx_unlock(mtx);
 532
 533         return(0);
 534 }
 535
 536 static void
 537 chstart(struct cam_periph *periph, union ccb *start_ccb)
 538 {
 539         struct ch_softc *softc;
 540
 541         softc = (struct ch_softc *)periph->softc;
 542
 543         switch (softc->state) {
 544         case CH_STATE_NORMAL:
 545         {
 546                 xpt_release_ccb(start_ccb);
 547                 break;
 548         }
 549         case CH_STATE_PROBE:
 550         {
 551                 int mode_buffer_len;
 552                 void *mode_buffer;
 553
 554                 /*
 555                  * Include the block descriptor when calculating the mode
 556                  * buffer length,
 557                  */
 558                 mode_buffer_len = sizeof(struct scsi_mode_header_6) +
 559                                   sizeof(struct scsi_mode_blk_desc) +
 560                                  sizeof(struct page_element_address_assignment);
 561
 562                 mode_buffer = malloc(mode_buffer_len, M_SCSICH, M_NOWAIT);
 563
 564                 if (mode_buffer == NULL) {
 565                         printf("chstart: couldn't malloc mode sense data\n");
 566                         break;
 567                 }
 568                 bzero(mode_buffer, mode_buffer_len);
 569
 570                 /*
 571                  * Get the element address assignment page.
 572                  */
 573                 scsi_mode_sense(&start_ccb->csio,
 574                                 /* retries */ 1,
 575                                 /* cbfcnp */ chdone,
 576                                 /* tag_action */ MSG_SIMPLE_Q_TAG,
 577                                 /* dbd */ (softc->quirks & CH_Q_NO_DBD) ?
 578                                         FALSE : TRUE,
 579                                 /* page_code */ SMS_PAGE_CTRL_CURRENT,
 580                                 /* page */ CH_ELEMENT_ADDR_ASSIGN_PAGE,
 581                                 /* param_buf */ (u_int8_t *)mode_buffer,
 582                                 /* param_len */ mode_buffer_len,
 583                                 /* sense_len */ SSD_FULL_SIZE,
 584                                 /* timeout */ CH_TIMEOUT_MODE_SENSE);
 585
 586                 start_ccb->ccb_h.ccb_bp = NULL;
 587                 start_ccb->ccb_h.ccb_state = CH_CCB_PROBE;
 588                 xpt_action(start_ccb);
 589                 break;
 590         }
 591         }
 592 }
 593
 594 static void
 595 chdone(struct cam_periph *periph, union ccb *done_ccb)
 596 {
 597         struct ch_softc *softc;
 598         struct ccb_scsiio *csio;
 599
 600         softc = (struct ch_softc *)periph->softc;
 601         csio = &done_ccb->csio;
 602
 603         switch(done_ccb->ccb_h.ccb_state) {
 604         case CH_CCB_PROBE:
 605         {
 606                 struct scsi_mode_header_6 *mode_header;
 607                 struct page_element_address_assignment *ea;
 608                 char announce_buf[80];
 609
 610
 611                 mode_header = (struct scsi_mode_header_6 *)csio->data_ptr;
 612
 613                 ea = (struct page_element_address_assignment *)
 614                         find_mode_page_6(mode_header);
 615
 616                 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP){
 617
 618                         softc->sc_firsts[CHET_MT] = scsi_2btoul(ea->mtea);
 619                         softc->sc_counts[CHET_MT] = scsi_2btoul(ea->nmte);
 620                         softc->sc_firsts[CHET_ST] = scsi_2btoul(ea->fsea);
 621                         softc->sc_counts[CHET_ST] = scsi_2btoul(ea->nse);
 622                         softc->sc_firsts[CHET_IE] = scsi_2btoul(ea->fieea);
 623                         softc->sc_counts[CHET_IE] = scsi_2btoul(ea->niee);
 624                         softc->sc_firsts[CHET_DT] = scsi_2btoul(ea->fdtea);
 625                         softc->sc_counts[CHET_DT] = scsi_2btoul(ea->ndte);
 626                         softc->sc_picker = softc->sc_firsts[CHET_MT];
 627
 628 #define PLURAL(c)       (c) == 1 ? "" : "s"
 629                         snprintf(announce_buf, sizeof(announce_buf),
 630                                 "%d slot%s, %d drive%s, "
 631                                 "%d picker%s, %d portal%s",
 632                                 softc->sc_counts[CHET_ST],
 633                                 PLURAL(softc->sc_counts[CHET_ST]),
 634                                 softc->sc_counts[CHET_DT],
 635                                 PLURAL(softc->sc_counts[CHET_DT]),
 636                                 softc->sc_counts[CHET_MT],
 637                                 PLURAL(softc->sc_counts[CHET_MT]),
 638                                 softc->sc_counts[CHET_IE],
 639                                 PLURAL(softc->sc_counts[CHET_IE]));
 640 #undef PLURAL
 641                 } else {
 642                         int error;
 643
 644                         error = cherror(done_ccb, CAM_RETRY_SELTO,
 645                                         SF_RETRY_UA | SF_NO_PRINT);
 646                         /*
 647                          * Retry any UNIT ATTENTION type errors.  They
 648                          * are expected at boot.
 649                          */
 650                         if (error == ERESTART) {
 651                                 /*
 652                                  * A retry was scheuled, so
 653                                  * just return.
 654                                  */
 655                                 return;
 656                         } else if (error != 0) {
 657                                 int retry_scheduled;
 658                                 struct scsi_mode_sense_6 *sms;
 659
 660                                 sms = (struct scsi_mode_sense_6 *)
 661                                         done_ccb->csio.cdb_io.cdb_bytes;
 662
 663                                 /*
 664                                  * Check to see if block descriptors were
 665                                  * disabled.  Some devices don't like that.
 666                                  * We're taking advantage of the fact that
 667                                  * the first few bytes of the 6 and 10 byte
 668                                  * mode sense commands are the same.  If
 669                                  * block descriptors were disabled, enable
 670                                  * them and re-send the command.
 671                                  */
 672                                 if (sms->byte2 & SMS_DBD) {
 673                                         sms->byte2 &= ~SMS_DBD;
 674                                         xpt_action(done_ccb);
 675                                         softc->quirks |= CH_Q_NO_DBD;
 676                                         retry_scheduled = 1;
 677                                 } else
 678                                         retry_scheduled = 0;
 679
 680                                 /* Don't wedge this device's queue */
 681                                 if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
 682                                         cam_release_devq(done_ccb->ccb_h.path,
 683                                                  /*relsim_flags*/0,
 684                                                  /*reduction*/0,
 685                                                  /*timeout*/0,
 686                                                  /*getcount_only*/0);
 687
 688                                 if (retry_scheduled)
 689                                         return;
 690
 691                                 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK)
 692                                     == CAM_SCSI_STATUS_ERROR)
 693                                         scsi_sense_print(&done_ccb->csio);
 694                                 else {
 695                                         xpt_print(periph->path,
 696                                             "got CAM status %#x\n",
 697                                             done_ccb->ccb_h.status);
 698                                 }
 699                                 xpt_print(periph->path, "fatal error, failed "
 700                                     "to attach to device\n");
 701
 702                                 cam_periph_invalidate(periph);
 703
 704                                 announce_buf[0] = '\0';
 705                         }
 706                 }
 707                 if (announce_buf[0] != '\0') {
 708                         xpt_announce_periph(periph, announce_buf);
 709                         xpt_announce_quirks(periph, softc->quirks,
 710                             CH_Q_BIT_STRING);
 711                 }
 712                 softc->state = CH_STATE_NORMAL;
 713                 free(mode_header, M_SCSICH);
 714                 /*
 715                  * Since our peripheral may be invalidated by an error
 716                  * above or an external event, we must release our CCB
 717                  * before releasing the probe lock on the peripheral.
 718                  * The peripheral will only go away once the last lock
 719                  * is removed, and we need it around for the CCB release
 720                  * operation.
 721                  */
 722                 xpt_release_ccb(done_ccb);
 723                 cam_periph_unhold(periph);
 724                 return;
 725         }
 726         default:
 727                 break;
 728         }
 729         xpt_release_ccb(done_ccb);
 730 }
 731
 732 static int
 733 cherror(union ccb *ccb, u_int32_t cam_flags, u_int32_t sense_flags)
 734 {
 735         struct ch_softc *softc;
 736         struct cam_periph *periph;
 737
 738         periph = xpt_path_periph(ccb->ccb_h.path);
 739         softc = (struct ch_softc *)periph->softc;
 740
 741         return (cam_periph_error(ccb, cam_flags, sense_flags,
 742                                  &softc->saved_ccb));
 743 }
 744
 745 static int
 746 chioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
 747 {
 748         struct cam_periph *periph;
 749         struct ch_softc *softc;
 750         int error;
 751
 752         periph = (struct cam_periph *)dev->si_drv1;
 753         if (periph == NULL)
 754                 return(ENXIO);
 755
 756         cam_periph_lock(periph);
 757         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("entering chioctl\n"));
 758
 759         softc = (struct ch_softc *)periph->softc;
 760
 761         error = 0;
 762
 763         CAM_DEBUG(periph->path, CAM_DEBUG_TRACE,
 764                   ("trying to do ioctl %#lx\n", cmd));
 765
 766         /*
 767          * If this command can change the device's state, we must
 768          * have the device open for writing.
 769          */
 770         switch (cmd) {
 771         case CHIOGPICKER:
 772         case CHIOGPARAMS:
 773         case OCHIOGSTATUS:
 774         case CHIOGSTATUS:
 775                 break;
 776
 777         default:
 778                 if ((flag & FWRITE) == 0) {
 779                         cam_periph_unlock(periph);
 780                         return (EBADF);
 781                 }
 782         }
 783
 784         switch (cmd) {
 785         case CHIOMOVE:
 786                 error = chmove(periph, (struct changer_move *)addr);
 787                 break;
 788
 789         case CHIOEXCHANGE:
 790                 error = chexchange(periph, (struct changer_exchange *)addr);
 791                 break;
 792
 793         case CHIOPOSITION:
 794                 error = chposition(periph, (struct changer_position *)addr);
 795                 break;
 796
 797         case CHIOGPICKER:
 798                 *(int *)addr = softc->sc_picker - softc->sc_firsts[CHET_MT];
 799                 break;
 800
 801         case CHIOSPICKER:
 802         {
 803                 int new_picker = *(int *)addr;
 804
 805                 if (new_picker > (softc->sc_counts[CHET_MT] - 1)) {
 806                         error = EINVAL;
 807                         break;
 808                 }
 809                 softc->sc_picker = softc->sc_firsts[CHET_MT] + new_picker;
 810                 break;
 811         }
 812         case CHIOGPARAMS:
 813         {
 814                 struct changer_params *cp = (struct changer_params *)addr;
 815
 816                 cp->cp_npickers = softc->sc_counts[CHET_MT];
 817                 cp->cp_nslots = softc->sc_counts[CHET_ST];
 818                 cp->cp_nportals = softc->sc_counts[CHET_IE];
 819                 cp->cp_ndrives = softc->sc_counts[CHET_DT];
 820                 break;
 821         }
 822         case CHIOIELEM:
 823                 error = chielem(periph, *(unsigned int *)addr);
 824                 break;
 825
 826         case OCHIOGSTATUS:
 827         {
 828                 error = chgetelemstatus(periph, SCSI_REV_2, cmd,
 829                     (struct changer_element_status_request *)addr);
 830                 break;
 831         }
 832
 833         case CHIOGSTATUS:
 834         {
 835                 int scsi_version;
 836
 837                 scsi_version = chscsiversion(periph);
 838                 if (scsi_version >= SCSI_REV_0) {
 839                         error = chgetelemstatus(periph, scsi_version, cmd,
 840                             (struct changer_element_status_request *)addr);
 841                 }
 842                 else { /* unable to determine the SCSI version */
 843                         cam_periph_unlock(periph);
 844                         return (ENXIO);
 845                 }
 846                 break;
 847         }
 848
 849         case CHIOSETVOLTAG:
 850         {
 851                 error = chsetvoltag(periph,
 852                                     (struct changer_set_voltag_request *) addr);
 853                 break;
 854         }
 855
 856         /* Implement prevent/allow? */
 857
 858         default:
 859                 error = cam_periph_ioctl(periph, cmd, addr, cherror);
 860                 break;
 861         }
 862
 863         cam_periph_unlock(periph);
 864         return (error);
 865 }
 866
 867 static int
 868 chmove(struct cam_periph *periph, struct changer_move *cm)
 869 {
 870         struct ch_softc *softc;
 871         u_int16_t fromelem, toelem;
 872         union ccb *ccb;
 873         int error;
 874
 875         error = 0;
 876         softc = (struct ch_softc *)periph->softc;
 877
 878         /*
 879          * Check arguments.
 880          */
 881         if ((cm->cm_fromtype > CHET_DT) || (cm->cm_totype > CHET_DT))
 882                 return (EINVAL);
 883         if ((cm->cm_fromunit > (softc->sc_counts[cm->cm_fromtype] - 1)) ||
 884             (cm->cm_tounit > (softc->sc_counts[cm->cm_totype] - 1)))
 885                 return (ENODEV);
 886
 887         /*
 888          * Check the request against the changer's capabilities.
 889          */
 890         if ((softc->sc_movemask[cm->cm_fromtype] & (1 << cm->cm_totype)) == 0)
 891                 return (ENODEV);
 892
 893         /*
 894          * Calculate the source and destination elements.
 895          */
 896         fromelem = softc->sc_firsts[cm->cm_fromtype] + cm->cm_fromunit;
 897         toelem = softc->sc_firsts[cm->cm_totype] + cm->cm_tounit;
 898
 899         ccb = cam_periph_getccb(periph, CAM_PRIORITY_NORMAL);
 900
 901         scsi_move_medium(&ccb->csio,
 902                          /* retries */ 1,
 903                          /* cbfcnp */ chdone,
 904                          /* tag_action */ MSG_SIMPLE_Q_TAG,
 905                          /* tea */ softc->sc_picker,
 906                          /* src */ fromelem,
 907                          /* dst */ toelem,
 908                          /* invert */ (cm->cm_flags & CM_INVERT) ? TRUE : FALSE,
 909                          /* sense_len */ SSD_FULL_SIZE,
 910                          /* timeout */ CH_TIMEOUT_MOVE_MEDIUM);
 911
 912         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/CAM_RETRY_SELTO,
 913                                   /*sense_flags*/ SF_RETRY_UA,
 914                                   softc->device_stats);
 915
 916         xpt_release_ccb(ccb);
 917
 918         return(error);
 919 }
 920
 921 static int
 922 chexchange(struct cam_periph *periph, struct changer_exchange *ce)
 923 {
 924         struct ch_softc *softc;
 925         u_int16_t src, dst1, dst2;
 926         union ccb *ccb;
 927         int error;
 928
 929         error = 0;
 930         softc = (struct ch_softc *)periph->softc;
 931         /*
 932          * Check arguments.
 933          */
 934         if ((ce->ce_srctype > CHET_DT) || (ce->ce_fdsttype > CHET_DT) ||
 935             (ce->ce_sdsttype > CHET_DT))
 936                 return (EINVAL);
 937         if ((ce->ce_srcunit > (softc->sc_counts[ce->ce_srctype] - 1)) ||
 938             (ce->ce_fdstunit > (softc->sc_counts[ce->ce_fdsttype] - 1)) ||
 939             (ce->ce_sdstunit > (softc->sc_counts[ce->ce_sdsttype] - 1)))
 940                 return (ENODEV);
 941
 942         /*
 943          * Check the request against the changer's capabilities.
 944          */
 945         if (((softc->sc_exchangemask[ce->ce_srctype] &
 946              (1 << ce->ce_fdsttype)) == 0) ||
 947             ((softc->sc_exchangemask[ce->ce_fdsttype] &
 948              (1 << ce->ce_sdsttype)) == 0))
 949                 return (ENODEV);
 950
 951         /*
 952          * Calculate the source and destination elements.
 953          */
 954         src = softc->sc_firsts[ce->ce_srctype] + ce->ce_srcunit;
 955         dst1 = softc->sc_firsts[ce->ce_fdsttype] + ce->ce_fdstunit;
 956         dst2 = softc->sc_firsts[ce->ce_sdsttype] + ce->ce_sdstunit;
 957
 958         ccb = cam_periph_getccb(periph, CAM_PRIORITY_NORMAL);
 959
 960         scsi_exchange_medium(&ccb->csio,
 961                              /* retries */ 1,
 962                              /* cbfcnp */ chdone,
 963                              /* tag_action */ MSG_SIMPLE_Q_TAG,
 964                              /* tea */ softc->sc_picker,
 965                              /* src */ src,
 966                              /* dst1 */ dst1,
 967                              /* dst2 */ dst2,
 968                              /* invert1 */ (ce->ce_flags & CE_INVERT1) ?
 969                                            TRUE : FALSE,
 970                              /* invert2 */ (ce->ce_flags & CE_INVERT2) ?
 971                                            TRUE : FALSE,
 972                              /* sense_len */ SSD_FULL_SIZE,
 973                              /* timeout */ CH_TIMEOUT_EXCHANGE_MEDIUM);
 974
 975         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/CAM_RETRY_SELTO,
 976                                   /*sense_flags*/ SF_RETRY_UA,
 977                                   softc->device_stats);
 978
 979         xpt_release_ccb(ccb);
 980
 981         return(error);
 982 }
 983
 984 static int
 985 chposition(struct cam_periph *periph, struct changer_position *cp)
 986 {
 987         struct ch_softc *softc;
 988         u_int16_t dst;
 989         union ccb *ccb;
 990         int error;
 991
 992         error = 0;
 993         softc = (struct ch_softc *)periph->softc;
 994
 995         /*
 996          * Check arguments.
 997          */
 998         if (cp->cp_type > CHET_DT)
 999                 return (EINVAL);
1000         if (cp->cp_unit > (softc->sc_counts[cp->cp_type] - 1))
1001                 return (ENODEV);
1002
1003         /*
1004          * Calculate the destination element.
1005          */
1006         dst = softc->sc_firsts[cp->cp_type] + cp->cp_unit;
1007
1008         ccb = cam_periph_getccb(periph, CAM_PRIORITY_NORMAL);
1009
1010         scsi_position_to_element(&ccb->csio,
1011                                  /* retries */ 1,
1012                                  /* cbfcnp */ chdone,
1013                                  /* tag_action */ MSG_SIMPLE_Q_TAG,
1014                                  /* tea */ softc->sc_picker,
1015                                  /* dst */ dst,
1016                                  /* invert */ (cp->cp_flags & CP_INVERT) ?
1017                                               TRUE : FALSE,
1018                                  /* sense_len */ SSD_FULL_SIZE,
1019                                  /* timeout */ CH_TIMEOUT_POSITION_TO_ELEMENT);
1020
1021         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
1022                                   /*sense_flags*/ SF_RETRY_UA,
1023                                   softc->device_stats);
1024
1025         xpt_release_ccb(ccb);
1026
1027         return(error);
1028 }
1029
1030 /*
1031  * Copy a volume tag to a volume_tag struct, converting SCSI byte order
1032  * to host native byte order in the volume serial number.  The volume
1033  * label as returned by the changer is transferred to user mode as
1034  * nul-terminated string.  Volume labels are truncated at the first
1035  * space, as suggested by SCSI-2.
1036  */
1037 static  void
1038 copy_voltag(struct changer_voltag *uvoltag, struct volume_tag *voltag)
1039 {
1040         int i;
1041         for (i=0; i<CH_VOLTAG_MAXLEN; i++) {
1042                 char c = voltag->vif[i];
1043                 if (c && c != ' ')
1044                         uvoltag->cv_volid[i] = c;
1045                 else
1046                         break;
1047         }
1048         uvoltag->cv_serial = scsi_2btoul(voltag->vsn);
1049 }
1050
1051 /*
1052  * Copy an element status descriptor to a user-mode
1053  * changer_element_status structure.
1054  */
1055 static void
1056 copy_element_status(struct ch_softc *softc,
1057                     u_int16_t flags,
1058                     struct read_element_status_descriptor *desc,
1059                     struct changer_element_status *ces,
1060                     int scsi_version)
1061 {
1062         u_int16_t eaddr = scsi_2btoul(desc->eaddr);
1063         u_int16_t et;
1064         struct volume_tag *pvol_tag = NULL, *avol_tag = NULL;
1065         struct read_element_status_device_id *devid = NULL;
1066
1067         ces->ces_int_addr = eaddr;
1068         /* set up logical address in element status */
1069         for (et = CHET_MT; et <= CHET_DT; et++) {
1070                 if ((softc->sc_firsts[et] <= eaddr)
1071                     && ((softc->sc_firsts[et] + softc->sc_counts[et])
1072                         > eaddr)) {
1073                         ces->ces_addr = eaddr - softc->sc_firsts[et];
1074                         ces->ces_type = et;
1075                         break;
1076                 }
1077         }
1078
1079         ces->ces_flags = desc->flags1;
1080
1081         ces->ces_sensecode = desc->sense_code;
1082         ces->ces_sensequal = desc->sense_qual;
1083
1084         if (desc->flags2 & READ_ELEMENT_STATUS_INVERT)
1085                 ces->ces_flags |= CES_INVERT;
1086
1087         if (desc->flags2 & READ_ELEMENT_STATUS_SVALID) {
1088
1089                 eaddr = scsi_2btoul(desc->ssea);
1090
1091                 /* convert source address to logical format */
1092                 for (et = CHET_MT; et <= CHET_DT; et++) {
1093                         if ((softc->sc_firsts[et] <= eaddr)
1094                             && ((softc->sc_firsts[et] + softc->sc_counts[et])
1095                                 > eaddr)) {
1096                                 ces->ces_source_addr =
1097                                         eaddr - softc->sc_firsts[et];
1098                                 ces->ces_source_type = et;
1099                                 ces->ces_flags |= CES_SOURCE_VALID;
1100                                 break;
1101                         }
1102                 }
1103
1104                 if (!(ces->ces_flags & CES_SOURCE_VALID))
1105                         printf("ch: warning: could not map element source "
1106                                "address %ud to a valid element type\n",
1107                                eaddr);
1108         }
1109
1110         /*
1111          * pvoltag and avoltag are common between SCSI-2 and later versions
1112          */
1113         if (flags & READ_ELEMENT_STATUS_PVOLTAG)
1114                 pvol_tag = &desc->voltag_devid.pvoltag;
1115         if (flags & READ_ELEMENT_STATUS_AVOLTAG)
1116                 avol_tag = (flags & READ_ELEMENT_STATUS_PVOLTAG) ?
1117                     &desc->voltag_devid.voltag[1] :&desc->voltag_devid.pvoltag;
1118         /*
1119          * For SCSI-3 and later, element status can carry designator and
1120          * other information.
1121          */
1122         if (scsi_version >= SCSI_REV_SPC) {
1123                 if ((flags & READ_ELEMENT_STATUS_PVOLTAG) ^
1124                     (flags & READ_ELEMENT_STATUS_AVOLTAG))
1125                         devid = &desc->voltag_devid.pvol_and_devid.devid;
1126                 else if (!(flags & READ_ELEMENT_STATUS_PVOLTAG) &&
1127                          !(flags & READ_ELEMENT_STATUS_AVOLTAG))
1128                         devid = &desc->voltag_devid.devid;
1129                 else /* Have both PVOLTAG and AVOLTAG */
1130                         devid = &desc->voltag_devid.vol_tags_and_devid.devid;
1131         }
1132
1133         if (pvol_tag)
1134                 copy_voltag(&(ces->ces_pvoltag), pvol_tag);
1135         if (avol_tag)
1136                 copy_voltag(&(ces->ces_pvoltag), avol_tag);
1137         if (devid != NULL) {
1138                 if (devid->designator_length > 0) {
1139                         bcopy((void *)devid->designator,
1140                               (void *)ces->ces_designator,
1141                               devid->designator_length);
1142                         ces->ces_designator_length = devid->designator_length;
1143                         /*
1144                          * Make sure we are always NUL terminated.  The
1145                          * This won't matter for the binary code set,
1146                          * since the user will only pay attention to the
1147                          * length field.
1148                          */
1149                         ces->ces_designator[devid->designator_length]= '\0';
1150                 }
1151                 if (devid->piv_assoc_designator_type &
1152                     READ_ELEMENT_STATUS_PIV_SET) {
1153                         ces->ces_flags |= CES_PIV;
1154                         ces->ces_protocol_id =
1155                             READ_ELEMENT_STATUS_PROTOCOL_ID(
1156                             devid->prot_code_set);
1157                 }
1158                 ces->ces_code_set =
1159                     READ_ELEMENT_STATUS_CODE_SET(devid->prot_code_set);
1160                 ces->ces_assoc = READ_ELEMENT_STATUS_ASSOCIATION(
1161                     devid->piv_assoc_designator_type);
1162                 ces->ces_designator_type = READ_ELEMENT_STATUS_DESIGNATOR_TYPE(
1163                     devid->piv_assoc_designator_type);
1164         } else if (scsi_version > SCSI_REV_2) {
1165                 /* SCSI-SPC and No devid, no designator */
1166                 ces->ces_designator_length = 0;
1167                 ces->ces_designator[0] = '\0';
1168                 ces->ces_protocol_id = CES_PROTOCOL_ID_FCP_4;
1169         }
1170
1171         if (scsi_version <= SCSI_REV_2) {
1172                 if (desc->dt_or_obsolete.scsi_2.dt_scsi_flags &
1173                     READ_ELEMENT_STATUS_DT_IDVALID) {
1174                         ces->ces_flags |= CES_SCSIID_VALID;
1175                         ces->ces_scsi_id =
1176                             desc->dt_or_obsolete.scsi_2.dt_scsi_addr;
1177                 }
1178
1179                 if (desc->dt_or_obsolete.scsi_2.dt_scsi_addr &
1180                     READ_ELEMENT_STATUS_DT_LUVALID) {
1181                         ces->ces_flags |= CES_LUN_VALID;
1182                         ces->ces_scsi_lun =
1183                             desc->dt_or_obsolete.scsi_2.dt_scsi_flags &
1184                             READ_ELEMENT_STATUS_DT_LUNMASK;
1185                 }
1186         }
1187 }
1188
1189 static int
1190 chgetelemstatus(struct cam_periph *periph, int scsi_version, u_long cmd,
1191                 struct changer_element_status_request *cesr)
1192 {
1193         struct read_element_status_header *st_hdr;
1194         struct read_element_status_page_header *pg_hdr;
1195         struct read_element_status_descriptor *desc;
1196         caddr_t data = NULL;
1197         size_t size, desclen;
1198         int avail, i, error = 0;
1199         int curdata, dvcid, sense_flags;
1200         int try_no_dvcid = 0;
1201         struct changer_element_status *user_data = NULL;
1202         struct ch_softc *softc;
1203         union ccb *ccb;
1204         int chet = cesr->cesr_element_type;
1205         int want_voltags = (cesr->cesr_flags & CESR_VOLTAGS) ? 1 : 0;
1206
1207         softc = (struct ch_softc *)periph->softc;
1208
1209         /* perform argument checking */
1210
1211         /*
1212          * Perform a range check on the cesr_element_{base,count}
1213          * request argument fields.
1214          */
1215         if ((softc->sc_counts[chet] - cesr->cesr_element_base) <= 0
1216             || (cesr->cesr_element_base + cesr->cesr_element_count)
1217                 > softc->sc_counts[chet])
1218                 return (EINVAL);
1219
1220         /*
1221          * Request one descriptor for the given element type.  This
1222          * is used to determine the size of the descriptor so that
1223          * we can allocate enough storage for all of them.  We assume
1224          * that the first one can fit into 1k.
1225          */
1226         cam_periph_unlock(periph);
1227         data = (caddr_t)malloc(1024, M_DEVBUF, M_WAITOK);
1228
1229         cam_periph_lock(periph);
1230         ccb = cam_periph_getccb(periph, CAM_PRIORITY_NORMAL);
1231
1232         sense_flags = SF_RETRY_UA;
1233         if (softc->quirks & CH_Q_NO_DVCID) {
1234                 dvcid = 0;
1235                 curdata = 0;
1236         } else {
1237                 dvcid = 1;
1238                 curdata = 1;
1239                 /*
1240                  * Don't print anything for an Illegal Request, because
1241                  * these flags can cause some changers to complain.  We'll
1242                  * retry without them if we get an error.
1243                  */
1244                 sense_flags |= SF_QUIET_IR;
1245         }
1246
1247 retry_einval:
1248
1249         scsi_read_element_status(&ccb->csio,
1250                                  /* retries */ 1,
1251                                  /* cbfcnp */ chdone,
1252                                  /* tag_action */ MSG_SIMPLE_Q_TAG,
1253                                  /* voltag */ want_voltags,
1254                                  /* sea */ softc->sc_firsts[chet],
1255                                  /* curdata */ curdata,
1256                                  /* dvcid */ dvcid,
1257                                  /* count */ 1,
1258                                  /* data_ptr */ data,
1259                                  /* dxfer_len */ 1024,
1260                                  /* sense_len */ SSD_FULL_SIZE,
1261                                  /* timeout */ CH_TIMEOUT_READ_ELEMENT_STATUS);
1262
1263         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
1264                                   /*sense_flags*/ sense_flags,
1265                                   softc->device_stats);
1266
1267         /*
1268          * An Illegal Request sense key (only used if there is no asc/ascq)
1269          * or 0x24,0x00 for an ASC/ASCQ both map to EINVAL.  If dvcid or
1270          * curdata are set (we set both or neither), try turning them off
1271          * and see if the command is successful.
1272          */
1273         if ((error == EINVAL)
1274          && (dvcid || curdata))  {
1275                 dvcid = 0;
1276                 curdata = 0;
1277                 error = 0;
1278                 /* At this point we want to report any Illegal Request */
1279                 sense_flags &= ~SF_QUIET_IR;
1280                 try_no_dvcid = 1;
1281                 goto retry_einval;
1282         }
1283
1284         /*
1285          * In this case, we tried a read element status with dvcid and
1286          * curdata set, and it failed.  We retried without those bits, and
1287          * it succeeded.  Suggest to the user that he set a quirk, so we
1288          * don't go through the retry process the first time in the future.
1289          * This should only happen on changers that claim SCSI-3 or higher,
1290          * but don't support these bits.
1291          */
1292         if ((try_no_dvcid != 0)
1293          && (error == 0))
1294                 softc->quirks |= CH_Q_NO_DVCID;
1295
1296         if (error)
1297                 goto done;
1298         cam_periph_unlock(periph);
1299
1300         st_hdr = (struct read_element_status_header *)data;
1301         pg_hdr = (struct read_element_status_page_header *)((uintptr_t)st_hdr +
1302                   sizeof(struct read_element_status_header));
1303         desclen = scsi_2btoul(pg_hdr->edl);
1304
1305         size = sizeof(struct read_element_status_header) +
1306                sizeof(struct read_element_status_page_header) +
1307                (desclen * cesr->cesr_element_count);
1308         /*
1309          * Reallocate storage for descriptors and get them from the
1310          * device.
1311          */
1312         free(data, M_DEVBUF);
1313         data = (caddr_t)malloc(size, M_DEVBUF, M_WAITOK);
1314
1315         cam_periph_lock(periph);
1316         scsi_read_element_status(&ccb->csio,
1317                                  /* retries */ 1,
1318                                  /* cbfcnp */ chdone,
1319                                  /* tag_action */ MSG_SIMPLE_Q_TAG,
1320                                  /* voltag */ want_voltags,
1321                                  /* sea */ softc->sc_firsts[chet]
1322                                  + cesr->cesr_element_base,
1323                                  /* curdata */ curdata,
1324                                  /* dvcid */ dvcid,
1325                                  /* count */ cesr->cesr_element_count,
1326                                  /* data_ptr */ data,
1327                                  /* dxfer_len */ size,
1328                                  /* sense_len */ SSD_FULL_SIZE,
1329                                  /* timeout */ CH_TIMEOUT_READ_ELEMENT_STATUS);
1330
1331         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
1332                                   /*sense_flags*/ SF_RETRY_UA,
1333                                   softc->device_stats);
1334
1335         if (error)
1336                 goto done;
1337         cam_periph_unlock(periph);
1338
1339         /*
1340          * Fill in the user status array.
1341          */
1342         st_hdr = (struct read_element_status_header *)data;
1343         pg_hdr = (struct read_element_status_page_header *)((uintptr_t)st_hdr +
1344                   sizeof(struct read_element_status_header));
1345         avail = scsi_2btoul(st_hdr->count);
1346
1347         if (avail != cesr->cesr_element_count) {
1348                 xpt_print(periph->path,
1349                     "warning, READ ELEMENT STATUS avail != count\n");
1350         }
1351
1352         user_data = (struct changer_element_status *)
1353                 malloc(avail * sizeof(struct changer_element_status),
1354                        M_DEVBUF, M_WAITOK | M_ZERO);
1355
1356         desc = (struct read_element_status_descriptor *)((uintptr_t)data +
1357                 sizeof(struct read_element_status_header) +
1358                 sizeof(struct read_element_status_page_header));
1359         /*
1360          * Set up the individual element status structures
1361          */
1362         for (i = 0; i < avail; ++i) {
1363                 struct changer_element_status *ces;
1364
1365                 /*
1366                  * In the changer_element_status structure, fields from
1367                  * the beginning to the field of ces_scsi_lun are common
1368                  * between SCSI-2 and SCSI-3, while all the rest are new
1369                  * from SCSI-3. In order to maintain backward compatibility
1370                  * of the chio command, the ces pointer, below, is computed
1371                  * such that it lines up with the structure boundary
1372                  * corresponding to the SCSI version.
1373                  */
1374                 ces = cmd == OCHIOGSTATUS ?
1375                     (struct changer_element_status *)
1376                     ((unsigned char *)user_data + i *
1377                      (offsetof(struct changer_element_status,ces_scsi_lun)+1)):
1378                     &user_data[i];
1379
1380                 copy_element_status(softc, pg_hdr->flags, desc,
1381                                     ces, scsi_version);
1382
1383                 desc = (struct read_element_status_descriptor *)
1384                        ((unsigned char *)desc + desclen);
1385         }
1386
1387         /* Copy element status structures out to userspace. */
1388         if (cmd == OCHIOGSTATUS)
1389                 error = copyout(user_data,
1390                                 cesr->cesr_element_status,
1391                                 avail* (offsetof(struct changer_element_status,
1392                                 ces_scsi_lun) + 1));
1393         else
1394                 error = copyout(user_data,
1395                                 cesr->cesr_element_status,
1396                                 avail * sizeof(struct changer_element_status));
1397
1398         cam_periph_lock(periph);
1399
1400  done:
1401         xpt_release_ccb(ccb);
1402
1403         if (data != NULL)
1404                 free(data, M_DEVBUF);
1405         if (user_data != NULL)
1406                 free(user_data, M_DEVBUF);
1407
1408         return (error);
1409 }
1410
1411 static int
1412 chielem(struct cam_periph *periph,
1413         unsigned int timeout)
1414 {
1415         union ccb *ccb;
1416         struct ch_softc *softc;
1417         int error;
1418
1419         if (!timeout) {
1420                 timeout = CH_TIMEOUT_INITIALIZE_ELEMENT_STATUS;
1421         } else {
1422                 timeout *= 1000;
1423         }
1424
1425         error = 0;
1426         softc = (struct ch_softc *)periph->softc;
1427
1428         ccb = cam_periph_getccb(periph, CAM_PRIORITY_NORMAL);
1429
1430         scsi_initialize_element_status(&ccb->csio,
1431                                       /* retries */ 1,
1432                                       /* cbfcnp */ chdone,
1433                                       /* tag_action */ MSG_SIMPLE_Q_TAG,
1434                                       /* sense_len */ SSD_FULL_SIZE,
1435                                       /* timeout */ timeout);
1436
1437         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
1438                                   /*sense_flags*/ SF_RETRY_UA,
1439                                   softc->device_stats);
1440
1441         xpt_release_ccb(ccb);
1442
1443         return(error);
1444 }
1445
1446 static int
1447 chsetvoltag(struct cam_periph *periph,
1448             struct changer_set_voltag_request *csvr)
1449 {
1450         union ccb *ccb;
1451         struct ch_softc *softc;
1452         u_int16_t ea;
1453         u_int8_t sac;
1454         struct scsi_send_volume_tag_parameters ssvtp;
1455         int error;
1456         int i;
1457
1458         error = 0;
1459         softc = (struct ch_softc *)periph->softc;
1460
1461         bzero(&ssvtp, sizeof(ssvtp));
1462         for (i=0; i<sizeof(ssvtp.vitf); i++) {
1463                 ssvtp.vitf[i] = ' ';
1464         }
1465
1466         /*
1467          * Check arguments.
1468          */
1469         if (csvr->csvr_type > CHET_DT)
1470                 return EINVAL;
1471         if (csvr->csvr_addr > (softc->sc_counts[csvr->csvr_type] - 1))
1472                 return ENODEV;
1473
1474         ea = softc->sc_firsts[csvr->csvr_type] + csvr->csvr_addr;
1475
1476         if (csvr->csvr_flags & CSVR_ALTERNATE) {
1477                 switch (csvr->csvr_flags & CSVR_MODE_MASK) {
1478                 case CSVR_MODE_SET:
1479                         sac = SEND_VOLUME_TAG_ASSERT_ALTERNATE;
1480                         break;
1481                 case CSVR_MODE_REPLACE:
1482                         sac = SEND_VOLUME_TAG_REPLACE_ALTERNATE;
1483                         break;
1484                 case CSVR_MODE_CLEAR:
1485                         sac = SEND_VOLUME_TAG_UNDEFINED_ALTERNATE;
1486                         break;
1487                 default:
1488                         error = EINVAL;
1489                         goto out;
1490                 }
1491         } else {
1492                 switch (csvr->csvr_flags & CSVR_MODE_MASK) {
1493                 case CSVR_MODE_SET:
1494                         sac = SEND_VOLUME_TAG_ASSERT_PRIMARY;
1495                         break;
1496                 case CSVR_MODE_REPLACE:
1497                         sac = SEND_VOLUME_TAG_REPLACE_PRIMARY;
1498                         break;
1499                 case CSVR_MODE_CLEAR:
1500                         sac = SEND_VOLUME_TAG_UNDEFINED_PRIMARY;
1501                         break;
1502                 default:
1503                         error = EINVAL;
1504                         goto out;
1505                 }
1506         }
1507
1508         memcpy(ssvtp.vitf, csvr->csvr_voltag.cv_volid,
1509                min(strlen(csvr->csvr_voltag.cv_volid), sizeof(ssvtp.vitf)));
1510         scsi_ulto2b(csvr->csvr_voltag.cv_serial, ssvtp.minvsn);
1511
1512         ccb = cam_periph_getccb(periph, CAM_PRIORITY_NORMAL);
1513
1514         scsi_send_volume_tag(&ccb->csio,
1515                              /* retries */ 1,
1516                              /* cbfcnp */ chdone,
1517                              /* tag_action */ MSG_SIMPLE_Q_TAG,
1518                              /* element_address */ ea,
1519                              /* send_action_code */ sac,
1520                              /* parameters */ &ssvtp,
1521                              /* sense_len */ SSD_FULL_SIZE,
1522                              /* timeout */ CH_TIMEOUT_SEND_VOLTAG);
1523
1524         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
1525                                   /*sense_flags*/ SF_RETRY_UA,
1526                                   softc->device_stats);
1527
1528         xpt_release_ccb(ccb);
1529
1530  out:
1531         return error;
1532 }
1533
1534 static int
1535 chgetparams(struct cam_periph *periph)
1536 {
1537         union ccb *ccb;
1538         struct ch_softc *softc;
1539         void *mode_buffer;
1540         int mode_buffer_len;
1541         struct page_element_address_assignment *ea;
1542         struct page_device_capabilities *cap;
1543         int error, from, dbd;
1544         u_int8_t *moves, *exchanges;
1545
1546         error = 0;
1547
1548         softc = (struct ch_softc *)periph->softc;
1549
1550         ccb = cam_periph_getccb(periph, CAM_PRIORITY_NORMAL);
1551
1552         /*
1553          * The scsi_mode_sense_data structure is just a convenience
1554          * structure that allows us to easily calculate the worst-case
1555          * storage size of the mode sense buffer.
1556          */
1557         mode_buffer_len = sizeof(struct scsi_mode_sense_data);
1558
1559         mode_buffer = malloc(mode_buffer_len, M_SCSICH, M_NOWAIT);
1560
1561         if (mode_buffer == NULL) {
1562                 printf("chgetparams: couldn't malloc mode sense data\n");
1563                 return(ENOSPC);
1564         }
1565
1566         bzero(mode_buffer, mode_buffer_len);
1567
1568         if (softc->quirks & CH_Q_NO_DBD)
1569                 dbd = FALSE;
1570         else
1571                 dbd = TRUE;
1572
1573         /*
1574          * Get the element address assignment page.
1575          */
1576         scsi_mode_sense(&ccb->csio,
1577                         /* retries */ 1,
1578                         /* cbfcnp */ chdone,
1579                         /* tag_action */ MSG_SIMPLE_Q_TAG,
1580                         /* dbd */ dbd,
1581                         /* page_code */ SMS_PAGE_CTRL_CURRENT,
1582                         /* page */ CH_ELEMENT_ADDR_ASSIGN_PAGE,
1583                         /* param_buf */ (u_int8_t *)mode_buffer,
1584                         /* param_len */ mode_buffer_len,
1585                         /* sense_len */ SSD_FULL_SIZE,
1586                         /* timeout */ CH_TIMEOUT_MODE_SENSE);
1587
1588         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
1589                                   /* sense_flags */ SF_RETRY_UA|SF_NO_PRINT,
1590                                   softc->device_stats);
1591
1592         if (error) {
1593                 if (dbd) {
1594                         struct scsi_mode_sense_6 *sms;
1595
1596                         sms = (struct scsi_mode_sense_6 *)
1597                                 ccb->csio.cdb_io.cdb_bytes;
1598
1599                         sms->byte2 &= ~SMS_DBD;
1600                         error = cam_periph_runccb(ccb, cherror,
1601                                                   /*cam_flags*/ CAM_RETRY_SELTO,
1602                                                   /*sense_flags*/ SF_RETRY_UA,
1603                                                   softc->device_stats);
1604                 } else {
1605                         /*
1606                          * Since we disabled sense printing above, print
1607                          * out the sense here since we got an error.
1608                          */
1609                         scsi_sense_print(&ccb->csio);
1610                 }
1611
1612                 if (error) {
1613                         xpt_print(periph->path,
1614                             "chgetparams: error getting element "
1615                             "address page\n");
1616                         xpt_release_ccb(ccb);
1617                         free(mode_buffer, M_SCSICH);
1618                         return(error);
1619                 }
1620         }
1621
1622         ea = (struct page_element_address_assignment *)
1623                 find_mode_page_6((struct scsi_mode_header_6 *)mode_buffer);
1624
1625         softc->sc_firsts[CHET_MT] = scsi_2btoul(ea->mtea);
1626         softc->sc_counts[CHET_MT] = scsi_2btoul(ea->nmte);
1627         softc->sc_firsts[CHET_ST] = scsi_2btoul(ea->fsea);
1628         softc->sc_counts[CHET_ST] = scsi_2btoul(ea->nse);
1629         softc->sc_firsts[CHET_IE] = scsi_2btoul(ea->fieea);
1630         softc->sc_counts[CHET_IE] = scsi_2btoul(ea->niee);
1631         softc->sc_firsts[CHET_DT] = scsi_2btoul(ea->fdtea);
1632         softc->sc_counts[CHET_DT] = scsi_2btoul(ea->ndte);
1633
1634         bzero(mode_buffer, mode_buffer_len);
1635
1636         /*
1637          * Now get the device capabilities page.
1638          */
1639         scsi_mode_sense(&ccb->csio,
1640                         /* retries */ 1,
1641                         /* cbfcnp */ chdone,
1642                         /* tag_action */ MSG_SIMPLE_Q_TAG,
1643                         /* dbd */ dbd,
1644                         /* page_code */ SMS_PAGE_CTRL_CURRENT,
1645                         /* page */ CH_DEVICE_CAP_PAGE,
1646                         /* param_buf */ (u_int8_t *)mode_buffer,
1647                         /* param_len */ mode_buffer_len,
1648                         /* sense_len */ SSD_FULL_SIZE,
1649                         /* timeout */ CH_TIMEOUT_MODE_SENSE);
1650
1651         error = cam_periph_runccb(ccb, cherror, /*cam_flags*/ CAM_RETRY_SELTO,
1652                                   /* sense_flags */ SF_RETRY_UA | SF_NO_PRINT,
1653                                   softc->device_stats);
1654
1655         if (error) {
1656                 if (dbd) {
1657                         struct scsi_mode_sense_6 *sms;
1658
1659                         sms = (struct scsi_mode_sense_6 *)
1660                                 ccb->csio.cdb_io.cdb_bytes;
1661
1662                         sms->byte2 &= ~SMS_DBD;
1663                         error = cam_periph_runccb(ccb, cherror,
1664                                                   /*cam_flags*/ CAM_RETRY_SELTO,
1665                                                   /*sense_flags*/ SF_RETRY_UA,
1666                                                   softc->device_stats);
1667                 } else {
1668                         /*
1669                          * Since we disabled sense printing above, print
1670                          * out the sense here since we got an error.
1671                          */
1672                         scsi_sense_print(&ccb->csio);
1673                 }
1674
1675                 if (error) {
1676                         xpt_print(periph->path,
1677                             "chgetparams: error getting device "
1678                             "capabilities page\n");
1679                         xpt_release_ccb(ccb);
1680                         free(mode_buffer, M_SCSICH);
1681                         return(error);
1682                 }
1683         }
1684
1685         xpt_release_ccb(ccb);
1686
1687         cap = (struct page_device_capabilities *)
1688                 find_mode_page_6((struct scsi_mode_header_6 *)mode_buffer);
1689
1690         bzero(softc->sc_movemask, sizeof(softc->sc_movemask));
1691         bzero(softc->sc_exchangemask, sizeof(softc->sc_exchangemask));
1692         moves = cap->move_from;
1693         exchanges = cap->exchange_with;
1694         for (from = CHET_MT; from <= CHET_MAX; ++from) {
1695                 softc->sc_movemask[from] = moves[from];
1696                 softc->sc_exchangemask[from] = exchanges[from];
1697         }
1698
1699         free(mode_buffer, M_SCSICH);
1700
1701         return(error);
1702 }
1703
1704 static int
1705 chscsiversion(struct cam_periph *periph)
1706 {
1707         struct scsi_inquiry_data *inq_data;
1708         struct ccb_getdev *cgd;
1709         int dev_scsi_version;
1710
1711         cam_periph_assert(periph, MA_OWNED);
1712         if ((cgd = (struct ccb_getdev *)xpt_alloc_ccb_nowait()) == NULL)
1713                 return (-1);
1714         /*
1715          * Get the device information.
1716          */
1717         xpt_setup_ccb(&cgd->ccb_h,
1718                       periph->path,
1719                       CAM_PRIORITY_NORMAL);
1720         cgd->ccb_h.func_code = XPT_GDEV_TYPE;
1721         xpt_action((union ccb *)cgd);
1722
1723         if (cgd->ccb_h.status != CAM_REQ_CMP) {
1724                 xpt_free_ccb((union ccb *)cgd);
1725                 return -1;
1726         }
1727
1728         inq_data = &cgd->inq_data;
1729         dev_scsi_version = inq_data->version;
1730         xpt_free_ccb((union ccb *)cgd);
1731
1732         return dev_scsi_version;
1733 }
1734
1735 void
1736 scsi_move_medium(struct ccb_scsiio *csio, u_int32_t retries,
1737                  void (*cbfcnp)(struct cam_periph *, union ccb *),
1738                  u_int8_t tag_action, u_int32_t tea, u_int32_t src,
1739                  u_int32_t dst, int invert, u_int8_t sense_len,
1740                  u_int32_t timeout)
1741 {
1742         struct scsi_move_medium *scsi_cmd;
1743
1744         scsi_cmd = (struct scsi_move_medium *)&csio->cdb_io.cdb_bytes;
1745         bzero(scsi_cmd, sizeof(*scsi_cmd));
1746
1747         scsi_cmd->opcode = MOVE_MEDIUM;
1748
1749         scsi_ulto2b(tea, scsi_cmd->tea);
1750         scsi_ulto2b(src, scsi_cmd->src);
1751         scsi_ulto2b(dst, scsi_cmd->dst);
1752
1753         if (invert)
1754                 scsi_cmd->invert |= MOVE_MEDIUM_INVERT;
1755
1756         cam_fill_csio(csio,
1757                       retries,
1758                       cbfcnp,
1759                       /*flags*/ CAM_DIR_NONE,
1760                       tag_action,
1761                       /*data_ptr*/ NULL,
1762                       /*dxfer_len*/ 0,
1763                       sense_len,
1764                       sizeof(*scsi_cmd),
1765                       timeout);
1766 }
1767
1768 void
1769 scsi_exchange_medium(struct ccb_scsiio *csio, u_int32_t retries,
1770                      void (*cbfcnp)(struct cam_periph *, union ccb *),
1771                      u_int8_t tag_action, u_int32_t tea, u_int32_t src,
1772                      u_int32_t dst1, u_int32_t dst2, int invert1,
1773                      int invert2, u_int8_t sense_len, u_int32_t timeout)
1774 {
1775         struct scsi_exchange_medium *scsi_cmd;
1776
1777         scsi_cmd = (struct scsi_exchange_medium *)&csio->cdb_io.cdb_bytes;
1778         bzero(scsi_cmd, sizeof(*scsi_cmd));
1779
1780         scsi_cmd->opcode = EXCHANGE_MEDIUM;
1781
1782         scsi_ulto2b(tea, scsi_cmd->tea);
1783         scsi_ulto2b(src, scsi_cmd->src);
1784         scsi_ulto2b(dst1, scsi_cmd->fdst);
1785         scsi_ulto2b(dst2, scsi_cmd->sdst);
1786
1787         if (invert1)
1788                 scsi_cmd->invert |= EXCHANGE_MEDIUM_INV1;
1789
1790         if (invert2)
1791                 scsi_cmd->invert |= EXCHANGE_MEDIUM_INV2;
1792
1793         cam_fill_csio(csio,
1794                       retries,
1795                       cbfcnp,
1796                       /*flags*/ CAM_DIR_NONE,
1797                       tag_action,
1798                       /*data_ptr*/ NULL,
1799                       /*dxfer_len*/ 0,
1800                       sense_len,
1801                       sizeof(*scsi_cmd),
1802                       timeout);
1803 }
1804
1805 void
1806 scsi_position_to_element(struct ccb_scsiio *csio, u_int32_t retries,
1807                          void (*cbfcnp)(struct cam_periph *, union ccb *),
1808                          u_int8_t tag_action, u_int32_t tea, u_int32_t dst,
1809                          int invert, u_int8_t sense_len, u_int32_t timeout)
1810 {
1811         struct scsi_position_to_element *scsi_cmd;
1812
1813         scsi_cmd = (struct scsi_position_to_element *)&csio->cdb_io.cdb_bytes;
1814         bzero(scsi_cmd, sizeof(*scsi_cmd));
1815
1816         scsi_cmd->opcode = POSITION_TO_ELEMENT;
1817
1818         scsi_ulto2b(tea, scsi_cmd->tea);
1819         scsi_ulto2b(dst, scsi_cmd->dst);
1820
1821         if (invert)
1822                 scsi_cmd->invert |= POSITION_TO_ELEMENT_INVERT;
1823
1824         cam_fill_csio(csio,
1825                       retries,
1826                       cbfcnp,
1827                       /*flags*/ CAM_DIR_NONE,
1828                       tag_action,
1829                       /*data_ptr*/ NULL,
1830                       /*dxfer_len*/ 0,
1831                       sense_len,
1832                       sizeof(*scsi_cmd),
1833                       timeout);
1834 }
1835
1836 void
1837 scsi_read_element_status(struct ccb_scsiio *csio, u_int32_t retries,
1838                          void (*cbfcnp)(struct cam_periph *, union ccb *),
1839                          u_int8_t tag_action, int voltag, u_int32_t sea,
1840                          int curdata, int dvcid,
1841                          u_int32_t count, u_int8_t *data_ptr,
1842                          u_int32_t dxfer_len, u_int8_t sense_len,
1843                          u_int32_t timeout)
1844 {
1845         struct scsi_read_element_status *scsi_cmd;
1846
1847         scsi_cmd = (struct scsi_read_element_status *)&csio->cdb_io.cdb_bytes;
1848         bzero(scsi_cmd, sizeof(*scsi_cmd));
1849
1850         scsi_cmd->opcode = READ_ELEMENT_STATUS;
1851
1852         scsi_ulto2b(sea, scsi_cmd->sea);
1853         scsi_ulto2b(count, scsi_cmd->count);
1854         scsi_ulto3b(dxfer_len, scsi_cmd->len);
1855         if (dvcid)
1856                 scsi_cmd->flags |= READ_ELEMENT_STATUS_DVCID;
1857         if (curdata)
1858                 scsi_cmd->flags |= READ_ELEMENT_STATUS_CURDATA;
1859
1860         if (voltag)
1861                 scsi_cmd->byte2 |= READ_ELEMENT_STATUS_VOLTAG;
1862
1863         cam_fill_csio(csio,
1864                       retries,
1865                       cbfcnp,
1866                       /*flags*/ CAM_DIR_IN,
1867                       tag_action,
1868                       data_ptr,
1869                       dxfer_len,
1870                       sense_len,
1871                       sizeof(*scsi_cmd),
1872                       timeout);
1873 }
1874
1875 void
1876 scsi_initialize_element_status(struct ccb_scsiio *csio, u_int32_t retries,
1877                                void (*cbfcnp)(struct cam_periph *, union ccb *),
1878                                u_int8_t tag_action, u_int8_t sense_len,
1879                                u_int32_t timeout)
1880 {
1881         struct scsi_initialize_element_status *scsi_cmd;
1882
1883         scsi_cmd = (struct scsi_initialize_element_status *)
1884                     &csio->cdb_io.cdb_bytes;
1885         bzero(scsi_cmd, sizeof(*scsi_cmd));
1886
1887         scsi_cmd->opcode = INITIALIZE_ELEMENT_STATUS;
1888
1889         cam_fill_csio(csio,
1890                       retries,
1891                       cbfcnp,
1892                       /*flags*/ CAM_DIR_NONE,
1893                       tag_action,
1894                       /* data_ptr */ NULL,
1895                       /* dxfer_len */ 0,
1896                       sense_len,
1897                       sizeof(*scsi_cmd),
1898                       timeout);
1899 }
1900
1901 void
1902 scsi_send_volume_tag(struct ccb_scsiio *csio, u_int32_t retries,
1903                      void (*cbfcnp)(struct cam_periph *, union ccb *),
1904                      u_int8_t tag_action,
1905                      u_int16_t element_address,
1906                      u_int8_t send_action_code,
1907                      struct scsi_send_volume_tag_parameters *parameters,
1908                      u_int8_t sense_len, u_int32_t timeout)
1909 {
1910         struct scsi_send_volume_tag *scsi_cmd;
1911
1912         scsi_cmd = (struct scsi_send_volume_tag *) &csio->cdb_io.cdb_bytes;
1913         bzero(scsi_cmd, sizeof(*scsi_cmd));
1914
1915         scsi_cmd->opcode = SEND_VOLUME_TAG;
1916         scsi_ulto2b(element_address, scsi_cmd->ea);
1917         scsi_cmd->sac = send_action_code;
1918         scsi_ulto2b(sizeof(*parameters), scsi_cmd->pll);
1919
1920         cam_fill_csio(csio,
1921                       retries,
1922                       cbfcnp,
1923                       /*flags*/ CAM_DIR_OUT,
1924                       tag_action,
1925                       /* data_ptr */ (u_int8_t *) parameters,
1926                       sizeof(*parameters),
1927                       sense_len,
1928                       sizeof(*scsi_cmd),
1929                       timeout);
1930 }