sys/dev/disk/ata/atapi-tape.c

   1 /*-
   2  * Copyright (c) 1998,1999,2000,2001,2002 Søren Schmidt <sos@FreeBSD.org>
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer,
  10  *    without modification, immediately at the beginning of the file.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  * 3. The name of the author may not be used to endorse or promote products
  15  *    derived from this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  *
  28  * $FreeBSD: src/sys/dev/ata/atapi-tape.c,v 1.36.2.12 2002/07/31 11:19:26 sos Exp $
  29  * $DragonFly: src/sys/dev/disk/ata/atapi-tape.c,v 1.22 2008/01/06 16:55:49 swildner Exp $
  30  */
  31
  32 #include "opt_ata.h"
  33 #include <sys/param.h>
  34 #include <sys/systm.h>
  35 #include <sys/ata.h>
  36 #include <sys/kernel.h>
  37 #include <sys/conf.h>
  38 #include <sys/malloc.h>
  39 #include <sys/buf.h>
  40 #include <sys/bus.h>
  41 #include <sys/mtio.h>
  42 #include <sys/diskslice.h>
  43 #include <sys/devicestat.h>
  44 #include <sys/proc.h>
  45 #include <sys/buf2.h>
  46 #include <sys/thread2.h>
  47
  48 #include "ata-all.h"
  49 #include "atapi-all.h"
  50 #include "atapi-tape.h"
  51
  52 /* device structures */
  53 static  d_open_t        astopen;
  54 static  d_close_t       astclose;
  55 static  d_ioctl_t       astioctl;
  56 static  d_strategy_t    aststrategy;
  57
  58 static struct dev_ops ast_ops = {
  59         { "ast", 119, D_TAPE | D_TRACKCLOSE },
  60         .d_open =       astopen,
  61         .d_close =      astclose,
  62         .d_read =       physread,
  63         .d_write =      physwrite,
  64         .d_ioctl =      astioctl,
  65         .d_strategy =   aststrategy
  66 };
  67
  68 /* prototypes */
  69 static int ast_sense(struct ast_softc *);
  70 static void ast_describe(struct ast_softc *);
  71 static int ast_done(struct atapi_request *);
  72 static int ast_mode_sense(struct ast_softc *, int, void *, int);
  73 static int ast_mode_select(struct ast_softc *, void *, int);
  74 static int ast_write_filemark(struct ast_softc *, u_int8_t);
  75 static int ast_read_position(struct ast_softc *, int, struct ast_readposition *);
  76 static int ast_space(struct ast_softc *, u_int8_t, int32_t);
  77 static int ast_locate(struct ast_softc *, int, u_int32_t);
  78 static int ast_prevent_allow(struct ast_softc *stp, int);
  79 static int ast_load_unload(struct ast_softc *, u_int8_t);
  80 static int ast_rewind(struct ast_softc *);
  81 static int ast_erase(struct ast_softc *);
  82
  83 /* internal vars */
  84 static u_int32_t ast_lun_map = 0;
  85 static u_int64_t ast_total = 0;
  86 static MALLOC_DEFINE(M_AST, "AST driver", "ATAPI tape driver buffers");
  87
  88 int
  89 astattach(struct ata_device *atadev)
  90 {
  91     struct ast_softc *stp;
  92     struct ast_readposition position;
  93     cdev_t dev;
  94
  95     stp = kmalloc(sizeof(struct ast_softc), M_AST, M_WAITOK | M_ZERO);
  96
  97     stp->device = atadev;
  98     stp->lun = ata_get_lun(&ast_lun_map);
  99     ata_set_name(atadev, "ast", stp->lun);
 100     bioq_init(&stp->bio_queue);
 101
 102     if (ast_sense(stp)) {
 103         kfree(stp, M_AST);
 104         return 0;
 105     }
 106
 107     if (!strcmp(atadev->param->model, "OnStream DI-30")) {
 108         struct ast_transferpage transfer;
 109         struct ast_identifypage identify;
 110
 111         stp->flags |= F_ONSTREAM;
 112         bzero(&transfer, sizeof(struct ast_transferpage));
 113         ast_mode_sense(stp, ATAPI_TAPE_TRANSFER_PAGE,
 114                        &transfer, sizeof(transfer));
 115         bzero(&identify, sizeof(struct ast_identifypage));
 116         ast_mode_sense(stp, ATAPI_TAPE_IDENTIFY_PAGE,
 117                        &identify, sizeof(identify));
 118         strncpy(identify.ident, "FBSD", 4);
 119         ast_mode_select(stp, &identify, sizeof(identify));
 120         ast_read_position(stp, 0, &position);
 121     }
 122
 123     devstat_add_entry(&stp->stats, "ast", stp->lun, DEV_BSIZE,
 124                       DEVSTAT_NO_ORDERED_TAGS,
 125                       DEVSTAT_TYPE_SEQUENTIAL | DEVSTAT_TYPE_IF_IDE,
 126                       DEVSTAT_PRIORITY_TAPE);
 127     dev = make_dev(&ast_ops, dkmakeminor(stp->lun, 0, 0),
 128                    UID_ROOT, GID_OPERATOR, 0640, "ast%d", stp->lun);
 129     dev->si_drv1 = stp;
 130     dev->si_iosize_max = 256 * DEV_BSIZE;
 131     dev = make_dev(&ast_ops, dkmakeminor(stp->lun, 0, 1),
 132                    UID_ROOT, GID_OPERATOR, 0640, "nast%d", stp->lun);
 133     dev->si_drv1 = stp;
 134     dev->si_iosize_max = 256 * DEV_BSIZE;
 135     stp->device->flags |= ATA_D_MEDIA_CHANGED;
 136     ast_describe(stp);
 137     atadev->driver = stp;
 138     return 1;
 139 }
 140
 141 void
 142 astdetach(struct ata_device *atadev)
 143 {
 144     struct ast_softc *stp = atadev->driver;
 145     struct buf *bp;
 146     struct bio *bio;
 147
 148     while ((bio = bioq_first(&stp->bio_queue))) {
 149         bioq_remove(&stp->bio_queue, bio);
 150         bp = bio->bio_buf;
 151         bp->b_flags |= B_ERROR;
 152         bp->b_error = ENXIO;
 153         biodone(bio);
 154     }
 155     devstat_remove_entry(&stp->stats);
 156     dev_ops_remove_minor(&ast_ops,/* dkunitmask(), */dkmakeunit(stp->lun));
 157     ata_free_name(atadev);
 158     ata_free_lun(&ast_lun_map, stp->lun);
 159     kfree(stp, M_AST);
 160     atadev->driver = NULL;
 161 }
 162
 163 static int
 164 ast_sense(struct ast_softc *stp)
 165 {
 166     int count, error = 0;
 167
 168     /* get drive capabilities, some drives needs this repeated */
 169     for (count = 0 ; count < 5 ; count++) {
 170         if (!(error = ast_mode_sense(stp, ATAPI_TAPE_CAP_PAGE,
 171                                      &stp->cap, sizeof(stp->cap)))) {
 172             if (stp->cap.blk32k)
 173                 stp->blksize = 32768;
 174             if (stp->cap.blk1024)
 175                 stp->blksize = 1024;
 176             if (stp->cap.blk512)
 177                 stp->blksize = 512;
 178             if (!stp->blksize)
 179                 continue;
 180             stp->cap.max_speed = ntohs(stp->cap.max_speed);
 181             stp->cap.max_defects = ntohs(stp->cap.max_defects);
 182             stp->cap.ctl = ntohs(stp->cap.ctl);
 183             stp->cap.speed = ntohs(stp->cap.speed);
 184             stp->cap.buffer_size = ntohs(stp->cap.buffer_size);
 185             return 0;
 186         }
 187     }
 188     return 1;
 189 }
 190
 191 static void
 192 ast_describe(struct ast_softc *stp)
 193 {
 194     if (bootverbose) {
 195         ata_prtdev(stp->device, "<%.40s/%.8s> tape drive at ata%d as %s\n",
 196                    stp->device->param->model, stp->device->param->revision,
 197                    device_get_unit(stp->device->channel->dev),
 198                    (stp->device->unit == ATA_MASTER) ? "master" : "slave");
 199         ata_prtdev(stp->device, "%dKB/s, ", stp->cap.max_speed);
 200         kprintf("transfer limit %d blk%s, ",
 201                stp->cap.ctl, (stp->cap.ctl > 1) ? "s" : "");
 202         kprintf("%dKB buffer, ", (stp->cap.buffer_size * DEV_BSIZE) / 1024);
 203         kprintf("%s\n", ata_mode2str(stp->device->mode));
 204         ata_prtdev(stp->device, "Medium: ");
 205         switch (stp->cap.medium_type) {
 206             case 0x00:
 207                 kprintf("none"); break;
 208             case 0x17:
 209                 kprintf("Travan 1 (400 Mbyte)"); break;
 210             case 0xb6:
 211                 kprintf("Travan 4 (4 Gbyte)"); break;
 212             case 0xda:
 213                 kprintf("OnStream ADR (15Gyte)"); break;
 214             default:
 215                 kprintf("unknown (0x%x)", stp->cap.medium_type);
 216         }
 217         if (stp->cap.readonly) kprintf(", readonly");
 218         if (stp->cap.reverse) kprintf(", reverse");
 219         if (stp->cap.eformat) kprintf(", eformat");
 220         if (stp->cap.qfa) kprintf(", qfa");
 221         if (stp->cap.lock) kprintf(", lock");
 222         if (stp->cap.locked) kprintf(", locked");
 223         if (stp->cap.prevent) kprintf(", prevent");
 224         if (stp->cap.eject) kprintf(", eject");
 225         if (stp->cap.disconnect) kprintf(", disconnect");
 226         if (stp->cap.ecc) kprintf(", ecc");
 227         if (stp->cap.compress) kprintf(", compress");
 228         if (stp->cap.blk512) kprintf(", 512b");
 229         if (stp->cap.blk1024) kprintf(", 1024b");
 230         if (stp->cap.blk32k) kprintf(", 32kb");
 231         kprintf("\n");
 232     }
 233     else {
 234         ata_prtdev(stp->device, "TAPE <%.40s> at ata%d-%s %s\n",
 235                    stp->device->param->model,
 236                    device_get_unit(stp->device->channel->dev),
 237                    (stp->device->unit == ATA_MASTER) ? "master" : "slave",
 238                    ata_mode2str(stp->device->mode));
 239     }
 240 }
 241
 242 static int
 243 astopen(struct dev_open_args *ap)
 244 {
 245     cdev_t dev = ap->a_head.a_dev;
 246     struct ast_softc *stp = dev->si_drv1;
 247
 248     if (!stp)
 249         return ENXIO;
 250
 251     if (count_dev(dev) > 1)
 252         return EBUSY;
 253
 254     atapi_test_ready(stp->device);
 255
 256     if (stp->cap.lock)
 257         ast_prevent_allow(stp, 1);
 258
 259     if (ast_sense(stp))
 260         ata_prtdev(stp->device, "sense media type failed\n");
 261
 262     stp->device->flags &= ~ATA_D_MEDIA_CHANGED;
 263     stp->flags &= ~(F_DATA_WRITTEN | F_FM_WRITTEN);
 264     ast_total = 0;
 265     return 0;
 266 }
 267
 268 static int
 269 astclose(struct dev_close_args *ap)
 270 {
 271     cdev_t dev = ap->a_head.a_dev;
 272     struct ast_softc *stp = dev->si_drv1;
 273
 274     /* flush buffers, some drives fail here, they should report ctl = 0 */
 275     if (stp->cap.ctl && (stp->flags & F_DATA_WRITTEN))
 276         ast_write_filemark(stp, 0);
 277
 278     /* write filemark if data written to tape */
 279     if (!(stp->flags & F_ONSTREAM) &&
 280         (stp->flags & (F_DATA_WRITTEN | F_FM_WRITTEN)) == F_DATA_WRITTEN)
 281         ast_write_filemark(stp, WF_WRITE);
 282
 283     /* if minor is even rewind on close */
 284     if (!(minor(dev) & 0x01))
 285         ast_rewind(stp);
 286
 287     if (stp->cap.lock && count_dev(dev) == 1)
 288         ast_prevent_allow(stp, 0);
 289
 290     stp->flags &= F_CTL_WARN;
 291 #ifdef AST_DEBUG
 292     ata_prtdev(stp->device, "%llu total bytes transferred\n", ast_total);
 293 #endif
 294     return 0;
 295 }
 296
 297 static int
 298 astioctl(struct dev_ioctl_args *ap)
 299 {
 300     cdev_t dev = ap->a_head.a_dev;
 301     struct ast_softc *stp = dev->si_drv1;
 302     int error = 0;
 303
 304     switch (ap->a_cmd) {
 305     case MTIOCGET:
 306         {
 307             struct mtget *g = (struct mtget *) ap->a_data;
 308
 309             bzero(g, sizeof(struct mtget));
 310             g->mt_type = 7;
 311             g->mt_density = 1;
 312             g->mt_blksiz = stp->blksize;
 313             g->mt_comp = stp->cap.compress;
 314             g->mt_density0 = 0; g->mt_density1 = 0;
 315             g->mt_density2 = 0; g->mt_density3 = 0;
 316             g->mt_blksiz0 = 0; g->mt_blksiz1 = 0;
 317             g->mt_blksiz2 = 0; g->mt_blksiz3 = 0;
 318             g->mt_comp0 = 0; g->mt_comp1 = 0;
 319             g->mt_comp2 = 0; g->mt_comp3 = 0;
 320             break;
 321         }
 322     case MTIOCTOP:
 323         {
 324             int i;
 325             struct mtop *mt = (struct mtop *)ap->a_data;
 326
 327             switch ((int16_t) (mt->mt_op)) {
 328
 329             case MTWEOF:
 330                 for (i=0; i < mt->mt_count && !error; i++)
 331                     error = ast_write_filemark(stp, WF_WRITE);
 332                 break;
 333
 334             case MTFSF:
 335                 if (mt->mt_count)
 336                     error = ast_space(stp, SP_FM, mt->mt_count);
 337                 break;
 338
 339             case MTBSF:
 340                 if (mt->mt_count)
 341                     error = ast_space(stp, SP_FM, -(mt->mt_count));
 342                 break;
 343
 344             case MTREW:
 345                 error = ast_rewind(stp);
 346                 break;
 347
 348             case MTOFFL:
 349                 error = ast_load_unload(stp, SS_EJECT);
 350                 break;
 351
 352             case MTNOP:
 353                 error = ast_write_filemark(stp, 0);
 354                 break;
 355
 356             case MTERASE:
 357                 error = ast_erase(stp);
 358                 break;
 359
 360             case MTEOD:
 361                 error = ast_space(stp, SP_EOD, 0);
 362                 break;
 363
 364             case MTRETENS:
 365                 error = ast_load_unload(stp, SS_RETENSION | SS_LOAD);
 366                 break;
 367
 368             case MTFSR:
 369             case MTBSR:
 370             case MTCACHE:
 371             case MTNOCACHE:
 372             case MTSETBSIZ:
 373             case MTSETDNSTY:
 374             case MTCOMP:
 375             default:
 376                 error = EINVAL;
 377             }
 378             break;
 379         }
 380     case MTIOCRDSPOS:
 381         {
 382             struct ast_readposition position;
 383
 384             if ((error = ast_read_position(stp, 0, &position)))
 385                 break;
 386             *(u_int32_t *)ap->a_data = position.tape;
 387             break;
 388         }
 389     case MTIOCRDHPOS:
 390         {
 391             struct ast_readposition position;
 392
 393             if ((error = ast_read_position(stp, 1, &position)))
 394                 break;
 395             *(u_int32_t *)ap->a_data = position.tape;
 396             break;
 397         }
 398     case MTIOCSLOCATE:
 399         error = ast_locate(stp, 0, *(u_int32_t *)ap->a_data);
 400         break;
 401     case MTIOCHLOCATE:
 402         error = ast_locate(stp, 1, *(u_int32_t *)ap->a_data);
 403         break;
 404     default:
 405         error = ENOTTY;
 406     }
 407     return error;
 408 }
 409
 410 static int
 411 aststrategy(struct dev_strategy_args *ap)
 412 {
 413     cdev_t dev = ap->a_head.a_dev;
 414     struct bio *bio = ap->a_bio;
 415     struct buf *bp = bio->bio_buf;
 416     struct ast_softc *stp = dev->si_drv1;
 417
 418     if (stp->device->flags & ATA_D_DETACHING) {
 419         bp->b_flags |= B_ERROR;
 420         bp->b_error = ENXIO;
 421         biodone(bio);
 422         return(0);
 423     }
 424
 425     /* if it's a null transfer, return immediatly. */
 426     if (bp->b_bcount == 0) {
 427         bp->b_resid = 0;
 428         biodone(bio);
 429         return(0);
 430     }
 431     if (bp->b_cmd != BUF_CMD_READ && (stp->flags & F_WRITEPROTECT)) {
 432         bp->b_flags |= B_ERROR;
 433         bp->b_error = EPERM;
 434         biodone(bio);
 435         return(0);
 436     }
 437
 438     /* check for != blocksize requests */
 439     if (bp->b_bcount % stp->blksize) {
 440         ata_prtdev(stp->device, "transfers must be multiple of %d\n",
 441                    stp->blksize);
 442         bp->b_flags |= B_ERROR;
 443         bp->b_error = EIO;
 444         biodone(bio);
 445         return(0);
 446     }
 447
 448     /* warn about transfers bigger than the device suggests */
 449     if (bp->b_bcount > stp->blksize * stp->cap.ctl) {
 450         if ((stp->flags & F_CTL_WARN) == 0) {
 451             ata_prtdev(stp->device, "WARNING: CTL exceeded %d > %d\n",
 452                        bp->b_bcount, stp->blksize * stp->cap.ctl);
 453             stp->flags |= F_CTL_WARN;
 454         }
 455     }
 456
 457     crit_enter();
 458     bioq_insert_tail(&stp->bio_queue, bio);
 459     crit_exit();
 460     ata_start(stp->device->channel);
 461     return(0);
 462 }
 463
 464 void
 465 ast_start(struct ata_device *atadev)
 466 {
 467     struct ast_softc *stp = atadev->driver;
 468     struct bio *bio = bioq_first(&stp->bio_queue);
 469     struct buf *bp;
 470     u_int32_t blkcount;
 471     int8_t ccb[16];
 472
 473     if (bio == NULL)
 474         return;
 475     bzero(ccb, sizeof(ccb));
 476
 477     bp = bio->bio_buf;
 478     if (bp->b_cmd == BUF_CMD_READ)
 479         ccb[0] = ATAPI_READ;
 480     else
 481         ccb[0] = ATAPI_WRITE;
 482
 483     bioq_remove(&stp->bio_queue, bio);
 484     blkcount = bp->b_bcount / stp->blksize;
 485
 486     ccb[1] = 1;
 487     ccb[2] = blkcount>>16;
 488     ccb[3] = blkcount>>8;
 489     ccb[4] = blkcount;
 490
 491     devstat_start_transaction(&stp->stats);
 492
 493     atapi_queue_cmd(stp->device, ccb, bp->b_data, blkcount * stp->blksize,
 494                     ((bp->b_cmd == BUF_CMD_READ) ? ATPR_F_READ : 0),
 495                     120, ast_done, bio);
 496 }
 497
 498 static int
 499 ast_done(struct atapi_request *request)
 500 {
 501     struct bio *bio = request->driver;
 502     struct buf *bp = bio->bio_buf;
 503     struct ast_softc *stp = request->device->driver;
 504
 505     if (request->error) {
 506         bp->b_error = request->error;
 507         bp->b_flags |= B_ERROR;
 508     } else {
 509         if (bp->b_cmd != BUF_CMD_READ)
 510             stp->flags |= F_DATA_WRITTEN;
 511         bp->b_resid = bp->b_bcount - request->donecount;
 512         ast_total += (bp->b_bcount - bp->b_resid);
 513     }
 514     devstat_end_transaction_buf(&stp->stats, bp);
 515     biodone(bio);
 516     return 0;
 517 }
 518
 519 static int
 520 ast_mode_sense(struct ast_softc *stp, int page, void *pagebuf, int pagesize)
 521 {
 522     int8_t ccb[16] = { ATAPI_MODE_SENSE, 0x08, page, pagesize>>8, pagesize,
 523                        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
 524     int error;
 525
 526     error = atapi_queue_cmd(stp->device, ccb, pagebuf, pagesize, ATPR_F_READ,
 527                             10, NULL, NULL);
 528 #ifdef AST_DEBUG
 529     atapi_dump("ast: mode sense ", pagebuf, pagesize);
 530 #endif
 531     return error;
 532 }
 533
 534 static int
 535 ast_mode_select(struct ast_softc *stp, void *pagebuf, int pagesize)
 536 {
 537     int8_t ccb[16] = { ATAPI_MODE_SELECT, 0x10, 0, pagesize>>8, pagesize,
 538                        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
 539
 540 #ifdef AST_DEBUG
 541     ata_prtdev(stp->device, "modeselect pagesize=%d\n", pagesize);
 542     atapi_dump("mode select ", pagebuf, pagesize);
 543 #endif
 544     return atapi_queue_cmd(stp->device, ccb, pagebuf, pagesize, 0,
 545                            10, NULL, NULL);
 546 }
 547
 548 static int
 549 ast_write_filemark(struct ast_softc *stp, u_int8_t function)
 550 {
 551     int8_t ccb[16] = { ATAPI_WEOF, 0x01, 0, 0, function, 0, 0, 0,
 552                        0, 0, 0, 0, 0, 0, 0, 0 };
 553     int error;
 554
 555     if (stp->flags & F_ONSTREAM)
 556         ccb[4] = 0x00;          /* only flush buffers supported */
 557     else {
 558         if (function) {
 559             if (stp->flags & F_FM_WRITTEN)
 560                 stp->flags &= ~F_DATA_WRITTEN;
 561             else
 562                 stp->flags |= F_FM_WRITTEN;
 563         }
 564     }
 565     error = atapi_queue_cmd(stp->device, ccb, NULL, 0, 0, 10, NULL, NULL);
 566     if (error)
 567         return error;
 568     return atapi_wait_dsc(stp->device, 10*60);
 569 }
 570
 571 static int
 572 ast_read_position(struct ast_softc *stp, int hard,
 573                   struct ast_readposition *position)
 574 {
 575     int8_t ccb[16] = { ATAPI_READ_POSITION, (hard ? 0x01 : 0), 0, 0, 0, 0, 0, 0,
 576                        0, 0, 0, 0, 0, 0, 0, 0 };
 577     int error;
 578
 579     error = atapi_queue_cmd(stp->device, ccb, (caddr_t)position,
 580                             sizeof(struct ast_readposition), ATPR_F_READ, 10,
 581                             NULL, NULL);
 582     position->tape = ntohl(position->tape);
 583     position->host = ntohl(position->host);
 584     return error;
 585 }
 586
 587 static int
 588 ast_space(struct ast_softc *stp, u_int8_t function, int32_t count)
 589 {
 590     int8_t ccb[16] = { ATAPI_SPACE, function, count>>16, count>>8, count,
 591                        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
 592
 593     return atapi_queue_cmd(stp->device, ccb, NULL, 0, 0, 60*60, NULL, NULL);
 594 }
 595
 596 static int
 597 ast_locate(struct ast_softc *stp, int hard, u_int32_t pos)
 598 {
 599     int8_t ccb[16] = { ATAPI_LOCATE, 0x01 | (hard ? 0x4 : 0), 0,
 600                        pos>>24, pos>>16, pos>>8, pos,
 601                        0, 0, 0, 0, 0, 0, 0, 0, 0 };
 602     int error;
 603
 604     error = atapi_queue_cmd(stp->device, ccb, NULL, 0, 0, 10, NULL, NULL);
 605     if (error)
 606         return error;
 607     return atapi_wait_dsc(stp->device, 60*60);
 608 }
 609
 610 static int
 611 ast_prevent_allow(struct ast_softc *stp, int lock)
 612 {
 613     int8_t ccb[16] = { ATAPI_PREVENT_ALLOW, 0, 0, 0, lock,
 614                        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
 615
 616     return atapi_queue_cmd(stp->device, ccb, NULL, 0, 0,30, NULL, NULL);
 617 }
 618
 619 static int
 620 ast_load_unload(struct ast_softc *stp, u_int8_t function)
 621 {
 622     int8_t ccb[16] = { ATAPI_START_STOP, 0x01, 0, 0, function, 0, 0, 0,
 623                        0, 0, 0, 0, 0, 0, 0, 0 };
 624     int error;
 625
 626     if ((function & SS_EJECT) && !stp->cap.eject)
 627         return 0;
 628     error = atapi_queue_cmd(stp->device, ccb, NULL, 0, 0, 10, NULL, NULL);
 629     if (error)
 630         return error;
 631     tsleep((caddr_t)&error, 0, "astlu", 1 * hz);
 632     if (function == SS_EJECT)
 633         return 0;
 634     return atapi_wait_dsc(stp->device, 60*60);
 635 }
 636
 637 static int
 638 ast_rewind(struct ast_softc *stp)
 639 {
 640     int8_t ccb[16] = { ATAPI_REZERO, 0x01, 0, 0, 0, 0, 0, 0,
 641                        0, 0, 0, 0, 0, 0, 0, 0 };
 642     int error;
 643
 644     error = atapi_queue_cmd(stp->device, ccb, NULL, 0, 0, 10, NULL, NULL);
 645     if (error)
 646         return error;
 647     return atapi_wait_dsc(stp->device, 60*60);
 648 }
 649
 650 static int
 651 ast_erase(struct ast_softc *stp)
 652 {
 653     int8_t ccb[16] = { ATAPI_ERASE, 3, 0, 0, 0, 0, 0, 0,
 654                        0, 0, 0, 0, 0, 0, 0, 0 };
 655     int error;
 656
 657     if ((error = ast_rewind(stp)))
 658         return error;
 659
 660     return atapi_queue_cmd(stp->device, ccb, NULL, 0, 0, 60*60, NULL, NULL);
 661 }