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     kprintf("devfs: Please check that only the right atapi-tape device was removed!!\n");
 157     dev_ops_remove_minor(&ast_ops,/* dkunitmask(), */dkmakeunit(stp->lun));
 158     ata_free_name(atadev);
 159     ata_free_lun(&ast_lun_map, stp->lun);
 160     kfree(stp, M_AST);
 161     atadev->driver = NULL;
 162 }
 163
 164 static int
 165 ast_sense(struct ast_softc *stp)
 166 {
 167     int count, error = 0;
 168
 169     /* get drive capabilities, some drives needs this repeated */
 170     for (count = 0 ; count < 5 ; count++) {
 171         if (!(error = ast_mode_sense(stp, ATAPI_TAPE_CAP_PAGE,
 172                                      &stp->cap, sizeof(stp->cap)))) {
 173             if (stp->cap.blk32k)
 174                 stp->blksize = 32768;
 175             if (stp->cap.blk1024)
 176                 stp->blksize = 1024;
 177             if (stp->cap.blk512)
 178                 stp->blksize = 512;
 179             if (!stp->blksize)
 180                 continue;
 181             stp->cap.max_speed = ntohs(stp->cap.max_speed);
 182             stp->cap.max_defects = ntohs(stp->cap.max_defects);
 183             stp->cap.ctl = ntohs(stp->cap.ctl);
 184             stp->cap.speed = ntohs(stp->cap.speed);
 185             stp->cap.buffer_size = ntohs(stp->cap.buffer_size);
 186             return 0;
 187         }
 188     }
 189     return 1;
 190 }
 191
 192 static void
 193 ast_describe(struct ast_softc *stp)
 194 {
 195     if (bootverbose) {
 196         ata_prtdev(stp->device, "<%.40s/%.8s> tape drive at ata%d as %s\n",
 197                    stp->device->param->model, stp->device->param->revision,
 198                    device_get_unit(stp->device->channel->dev),
 199                    (stp->device->unit == ATA_MASTER) ? "master" : "slave");
 200         ata_prtdev(stp->device, "%dKB/s, ", stp->cap.max_speed);
 201         kprintf("transfer limit %d blk%s, ",
 202                stp->cap.ctl, (stp->cap.ctl > 1) ? "s" : "");
 203         kprintf("%dKB buffer, ", (stp->cap.buffer_size * DEV_BSIZE) / 1024);
 204         kprintf("%s\n", ata_mode2str(stp->device->mode));
 205         ata_prtdev(stp->device, "Medium: ");
 206         switch (stp->cap.medium_type) {
 207             case 0x00:
 208                 kprintf("none"); break;
 209             case 0x17:
 210                 kprintf("Travan 1 (400 Mbyte)"); break;
 211             case 0xb6:
 212                 kprintf("Travan 4 (4 Gbyte)"); break;
 213             case 0xda:
 214                 kprintf("OnStream ADR (15Gyte)"); break;
 215             default:
 216                 kprintf("unknown (0x%x)", stp->cap.medium_type);
 217         }
 218         if (stp->cap.readonly) kprintf(", readonly");
 219         if (stp->cap.reverse) kprintf(", reverse");
 220         if (stp->cap.eformat) kprintf(", eformat");
 221         if (stp->cap.qfa) kprintf(", qfa");
 222         if (stp->cap.lock) kprintf(", lock");
 223         if (stp->cap.locked) kprintf(", locked");
 224         if (stp->cap.prevent) kprintf(", prevent");
 225         if (stp->cap.eject) kprintf(", eject");
 226         if (stp->cap.disconnect) kprintf(", disconnect");
 227         if (stp->cap.ecc) kprintf(", ecc");
 228         if (stp->cap.compress) kprintf(", compress");
 229         if (stp->cap.blk512) kprintf(", 512b");
 230         if (stp->cap.blk1024) kprintf(", 1024b");
 231         if (stp->cap.blk32k) kprintf(", 32kb");
 232         kprintf("\n");
 233     }
 234     else {
 235         ata_prtdev(stp->device, "TAPE <%.40s> at ata%d-%s %s\n",
 236                    stp->device->param->model,
 237                    device_get_unit(stp->device->channel->dev),
 238                    (stp->device->unit == ATA_MASTER) ? "master" : "slave",
 239                    ata_mode2str(stp->device->mode));
 240     }
 241 }
 242
 243 static int
 244 astopen(struct dev_open_args *ap)
 245 {
 246     cdev_t dev = ap->a_head.a_dev;
 247     struct ast_softc *stp = dev->si_drv1;
 248
 249     if (!stp)
 250         return ENXIO;
 251
 252     if (count_dev(dev) > 1)
 253         return EBUSY;
 254
 255     atapi_test_ready(stp->device);
 256
 257     if (stp->cap.lock)
 258         ast_prevent_allow(stp, 1);
 259
 260     if (ast_sense(stp))
 261         ata_prtdev(stp->device, "sense media type failed\n");
 262
 263     stp->device->flags &= ~ATA_D_MEDIA_CHANGED;
 264     stp->flags &= ~(F_DATA_WRITTEN | F_FM_WRITTEN);
 265     ast_total = 0;
 266     return 0;
 267 }
 268
 269 static int
 270 astclose(struct dev_close_args *ap)
 271 {
 272     cdev_t dev = ap->a_head.a_dev;
 273     struct ast_softc *stp = dev->si_drv1;
 274
 275     /* flush buffers, some drives fail here, they should report ctl = 0 */
 276     if (stp->cap.ctl && (stp->flags & F_DATA_WRITTEN))
 277         ast_write_filemark(stp, 0);
 278
 279     /* write filemark if data written to tape */
 280     if (!(stp->flags & F_ONSTREAM) &&
 281         (stp->flags & (F_DATA_WRITTEN | F_FM_WRITTEN)) == F_DATA_WRITTEN)
 282         ast_write_filemark(stp, WF_WRITE);
 283
 284     /* if minor is even rewind on close */
 285     if (!(minor(dev) & 0x01))
 286         ast_rewind(stp);
 287
 288     if (stp->cap.lock && count_dev(dev) == 1)
 289         ast_prevent_allow(stp, 0);
 290
 291     stp->flags &= F_CTL_WARN;
 292 #ifdef AST_DEBUG
 293     ata_prtdev(stp->device, "%llu total bytes transferred\n", ast_total);
 294 #endif
 295     return 0;
 296 }
 297
 298 static int
 299 astioctl(struct dev_ioctl_args *ap)
 300 {
 301     cdev_t dev = ap->a_head.a_dev;
 302     struct ast_softc *stp = dev->si_drv1;
 303     int error = 0;
 304
 305     switch (ap->a_cmd) {
 306     case MTIOCGET:
 307         {
 308             struct mtget *g = (struct mtget *) ap->a_data;
 309
 310             bzero(g, sizeof(struct mtget));
 311             g->mt_type = 7;
 312             g->mt_density = 1;
 313             g->mt_blksiz = stp->blksize;
 314             g->mt_comp = stp->cap.compress;
 315             g->mt_density0 = 0; g->mt_density1 = 0;
 316             g->mt_density2 = 0; g->mt_density3 = 0;
 317             g->mt_blksiz0 = 0; g->mt_blksiz1 = 0;
 318             g->mt_blksiz2 = 0; g->mt_blksiz3 = 0;
 319             g->mt_comp0 = 0; g->mt_comp1 = 0;
 320             g->mt_comp2 = 0; g->mt_comp3 = 0;
 321             break;
 322         }
 323     case MTIOCTOP:
 324         {
 325             int i;
 326             struct mtop *mt = (struct mtop *)ap->a_data;
 327
 328             switch ((int16_t) (mt->mt_op)) {
 329
 330             case MTWEOF:
 331                 for (i=0; i < mt->mt_count && !error; i++)
 332                     error = ast_write_filemark(stp, WF_WRITE);
 333                 break;
 334
 335             case MTFSF:
 336                 if (mt->mt_count)
 337                     error = ast_space(stp, SP_FM, mt->mt_count);
 338                 break;
 339
 340             case MTBSF:
 341                 if (mt->mt_count)
 342                     error = ast_space(stp, SP_FM, -(mt->mt_count));
 343                 break;
 344
 345             case MTREW:
 346                 error = ast_rewind(stp);
 347                 break;
 348
 349             case MTOFFL:
 350                 error = ast_load_unload(stp, SS_EJECT);
 351                 break;
 352
 353             case MTNOP:
 354                 error = ast_write_filemark(stp, 0);
 355                 break;
 356
 357             case MTERASE:
 358                 error = ast_erase(stp);
 359                 break;
 360
 361             case MTEOD:
 362                 error = ast_space(stp, SP_EOD, 0);
 363                 break;
 364
 365             case MTRETENS:
 366                 error = ast_load_unload(stp, SS_RETENSION | SS_LOAD);
 367                 break;
 368
 369             case MTFSR:
 370             case MTBSR:
 371             case MTCACHE:
 372             case MTNOCACHE:
 373             case MTSETBSIZ:
 374             case MTSETDNSTY:
 375             case MTCOMP:
 376             default:
 377                 error = EINVAL;
 378             }
 379             break;
 380         }
 381     case MTIOCRDSPOS:
 382         {
 383             struct ast_readposition position;
 384
 385             if ((error = ast_read_position(stp, 0, &position)))
 386                 break;
 387             *(u_int32_t *)ap->a_data = position.tape;
 388             break;
 389         }
 390     case MTIOCRDHPOS:
 391         {
 392             struct ast_readposition position;
 393
 394             if ((error = ast_read_position(stp, 1, &position)))
 395                 break;
 396             *(u_int32_t *)ap->a_data = position.tape;
 397             break;
 398         }
 399     case MTIOCSLOCATE:
 400         error = ast_locate(stp, 0, *(u_int32_t *)ap->a_data);
 401         break;
 402     case MTIOCHLOCATE:
 403         error = ast_locate(stp, 1, *(u_int32_t *)ap->a_data);
 404         break;
 405     default:
 406         error = ENOTTY;
 407     }
 408     return error;
 409 }
 410
 411 static int
 412 aststrategy(struct dev_strategy_args *ap)
 413 {
 414     cdev_t dev = ap->a_head.a_dev;
 415     struct bio *bio = ap->a_bio;
 416     struct buf *bp = bio->bio_buf;
 417     struct ast_softc *stp = dev->si_drv1;
 418
 419     if (stp->device->flags & ATA_D_DETACHING) {
 420         bp->b_flags |= B_ERROR;
 421         bp->b_error = ENXIO;
 422         biodone(bio);
 423         return(0);
 424     }
 425
 426     /* if it's a null transfer, return immediatly. */
 427     if (bp->b_bcount == 0) {
 428         bp->b_resid = 0;
 429         biodone(bio);
 430         return(0);
 431     }
 432     if (bp->b_cmd != BUF_CMD_READ && (stp->flags & F_WRITEPROTECT)) {
 433         bp->b_flags |= B_ERROR;
 434         bp->b_error = EPERM;
 435         biodone(bio);
 436         return(0);
 437     }
 438
 439     /* check for != blocksize requests */
 440     if (bp->b_bcount % stp->blksize) {
 441         ata_prtdev(stp->device, "transfers must be multiple of %d\n",
 442                    stp->blksize);
 443         bp->b_flags |= B_ERROR;
 444         bp->b_error = EIO;
 445         biodone(bio);
 446         return(0);
 447     }
 448
 449     /* warn about transfers bigger than the device suggests */
 450     if (bp->b_bcount > stp->blksize * stp->cap.ctl) {
 451         if ((stp->flags & F_CTL_WARN) == 0) {
 452             ata_prtdev(stp->device, "WARNING: CTL exceeded %d > %d\n",
 453                        bp->b_bcount, stp->blksize * stp->cap.ctl);
 454             stp->flags |= F_CTL_WARN;
 455         }
 456     }
 457
 458     crit_enter();
 459     bioq_insert_tail(&stp->bio_queue, bio);
 460     crit_exit();
 461     ata_start(stp->device->channel);
 462     return(0);
 463 }
 464
 465 void
 466 ast_start(struct ata_device *atadev)
 467 {
 468     struct ast_softc *stp = atadev->driver;
 469     struct bio *bio = bioq_first(&stp->bio_queue);
 470     struct buf *bp;
 471     u_int32_t blkcount;
 472     int8_t ccb[16];
 473
 474     if (bio == NULL)
 475         return;
 476     bzero(ccb, sizeof(ccb));
 477
 478     bp = bio->bio_buf;
 479     if (bp->b_cmd == BUF_CMD_READ)
 480         ccb[0] = ATAPI_READ;
 481     else
 482         ccb[0] = ATAPI_WRITE;
 483
 484     bioq_remove(&stp->bio_queue, bio);
 485     blkcount = bp->b_bcount / stp->blksize;
 486
 487     ccb[1] = 1;
 488     ccb[2] = blkcount>>16;
 489     ccb[3] = blkcount>>8;
 490     ccb[4] = blkcount;
 491
 492     devstat_start_transaction(&stp->stats);
 493
 494     atapi_queue_cmd(stp->device, ccb, bp->b_data, blkcount * stp->blksize,
 495                     ((bp->b_cmd == BUF_CMD_READ) ? ATPR_F_READ : 0),
 496                     120, ast_done, bio);
 497 }
 498
 499 static int
 500 ast_done(struct atapi_request *request)
 501 {
 502     struct bio *bio = request->driver;
 503     struct buf *bp = bio->bio_buf;
 504     struct ast_softc *stp = request->device->driver;
 505
 506     if (request->error) {
 507         bp->b_error = request->error;
 508         bp->b_flags |= B_ERROR;
 509     } else {
 510         if (bp->b_cmd != BUF_CMD_READ)
 511             stp->flags |= F_DATA_WRITTEN;
 512         bp->b_resid = bp->b_bcount - request->donecount;
 513         ast_total += (bp->b_bcount - bp->b_resid);
 514     }
 515     devstat_end_transaction_buf(&stp->stats, bp);
 516     biodone(bio);
 517     return 0;
 518 }
 519
 520 static int
 521 ast_mode_sense(struct ast_softc *stp, int page, void *pagebuf, int pagesize)
 522 {
 523     int8_t ccb[16] = { ATAPI_MODE_SENSE, 0x08, page, pagesize>>8, pagesize,
 524                        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
 525     int error;
 526
 527     error = atapi_queue_cmd(stp->device, ccb, pagebuf, pagesize, ATPR_F_READ,
 528                             10, NULL, NULL);
 529 #ifdef AST_DEBUG
 530     atapi_dump("ast: mode sense ", pagebuf, pagesize);
 531 #endif
 532     return error;
 533 }
 534
 535 static int
 536 ast_mode_select(struct ast_softc *stp, void *pagebuf, int pagesize)
 537 {
 538     int8_t ccb[16] = { ATAPI_MODE_SELECT, 0x10, 0, pagesize>>8, pagesize,
 539                        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
 540
 541 #ifdef AST_DEBUG
 542     ata_prtdev(stp->device, "modeselect pagesize=%d\n", pagesize);
 543     atapi_dump("mode select ", pagebuf, pagesize);
 544 #endif
 545     return atapi_queue_cmd(stp->device, ccb, pagebuf, pagesize, 0,
 546                            10, NULL, NULL);
 547 }
 548
 549 static int
 550 ast_write_filemark(struct ast_softc *stp, u_int8_t function)
 551 {
 552     int8_t ccb[16] = { ATAPI_WEOF, 0x01, 0, 0, function, 0, 0, 0,
 553                        0, 0, 0, 0, 0, 0, 0, 0 };
 554     int error;
 555
 556     if (stp->flags & F_ONSTREAM)
 557         ccb[4] = 0x00;          /* only flush buffers supported */
 558     else {
 559         if (function) {
 560             if (stp->flags & F_FM_WRITTEN)
 561                 stp->flags &= ~F_DATA_WRITTEN;
 562             else
 563                 stp->flags |= F_FM_WRITTEN;
 564         }
 565     }
 566     error = atapi_queue_cmd(stp->device, ccb, NULL, 0, 0, 10, NULL, NULL);
 567     if (error)
 568         return error;
 569     return atapi_wait_dsc(stp->device, 10*60);
 570 }
 571
 572 static int
 573 ast_read_position(struct ast_softc *stp, int hard,
 574                   struct ast_readposition *position)
 575 {
 576     int8_t ccb[16] = { ATAPI_READ_POSITION, (hard ? 0x01 : 0), 0, 0, 0, 0, 0, 0,
 577                        0, 0, 0, 0, 0, 0, 0, 0 };
 578     int error;
 579
 580     error = atapi_queue_cmd(stp->device, ccb, (caddr_t)position,
 581                             sizeof(struct ast_readposition), ATPR_F_READ, 10,
 582                             NULL, NULL);
 583     position->tape = ntohl(position->tape);
 584     position->host = ntohl(position->host);
 585     return error;
 586 }
 587
 588 static int
 589 ast_space(struct ast_softc *stp, u_int8_t function, int32_t count)
 590 {
 591     int8_t ccb[16] = { ATAPI_SPACE, function, count>>16, count>>8, count,
 592                        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
 593
 594     return atapi_queue_cmd(stp->device, ccb, NULL, 0, 0, 60*60, NULL, NULL);
 595 }
 596
 597 static int
 598 ast_locate(struct ast_softc *stp, int hard, u_int32_t pos)
 599 {
 600     int8_t ccb[16] = { ATAPI_LOCATE, 0x01 | (hard ? 0x4 : 0), 0,
 601                        pos>>24, pos>>16, pos>>8, pos,
 602                        0, 0, 0, 0, 0, 0, 0, 0, 0 };
 603     int error;
 604
 605     error = atapi_queue_cmd(stp->device, ccb, NULL, 0, 0, 10, NULL, NULL);
 606     if (error)
 607         return error;
 608     return atapi_wait_dsc(stp->device, 60*60);
 609 }
 610
 611 static int
 612 ast_prevent_allow(struct ast_softc *stp, int lock)
 613 {
 614     int8_t ccb[16] = { ATAPI_PREVENT_ALLOW, 0, 0, 0, lock,
 615                        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
 616
 617     return atapi_queue_cmd(stp->device, ccb, NULL, 0, 0,30, NULL, NULL);
 618 }
 619
 620 static int
 621 ast_load_unload(struct ast_softc *stp, u_int8_t function)
 622 {
 623     int8_t ccb[16] = { ATAPI_START_STOP, 0x01, 0, 0, function, 0, 0, 0,
 624                        0, 0, 0, 0, 0, 0, 0, 0 };
 625     int error;
 626
 627     if ((function & SS_EJECT) && !stp->cap.eject)
 628         return 0;
 629     error = atapi_queue_cmd(stp->device, ccb, NULL, 0, 0, 10, NULL, NULL);
 630     if (error)
 631         return error;
 632     tsleep((caddr_t)&error, 0, "astlu", 1 * hz);
 633     if (function == SS_EJECT)
 634         return 0;
 635     return atapi_wait_dsc(stp->device, 60*60);
 636 }
 637
 638 static int
 639 ast_rewind(struct ast_softc *stp)
 640 {
 641     int8_t ccb[16] = { ATAPI_REZERO, 0x01, 0, 0, 0, 0, 0, 0,
 642                        0, 0, 0, 0, 0, 0, 0, 0 };
 643     int error;
 644
 645     error = atapi_queue_cmd(stp->device, ccb, NULL, 0, 0, 10, NULL, NULL);
 646     if (error)
 647         return error;
 648     return atapi_wait_dsc(stp->device, 60*60);
 649 }
 650
 651 static int
 652 ast_erase(struct ast_softc *stp)
 653 {
 654     int8_t ccb[16] = { ATAPI_ERASE, 3, 0, 0, 0, 0, 0, 0,
 655                        0, 0, 0, 0, 0, 0, 0, 0 };
 656     int error;
 657
 658     if ((error = ast_rewind(stp)))
 659         return error;
 660
 661     return atapi_queue_cmd(stp->device, ccb, NULL, 0, 0, 60*60, NULL, NULL);
 662 }