SAFE public projects git trees. - safe/jmp/linux-2.6/blob - drivers/ide/ide-disk.c

   1 /*
   2  *  Copyright (C) 1994-1998        Linus Torvalds & authors (see below)
   3  *  Copyright (C) 1998-2002        Linux ATA Development
   4  *                                    Andre Hedrick <andre@linux-ide.org>
   5  *  Copyright (C) 2003             Red Hat
   6  *  Copyright (C) 2003-2005, 2007  Bartlomiej Zolnierkiewicz
   7  */
   8
   9 /*
  10  *  Mostly written by Mark Lord <mlord@pobox.com>
  11  *                and Gadi Oxman <gadio@netvision.net.il>
  12  *                and Andre Hedrick <andre@linux-ide.org>
  13  *
  14  * This is the IDE/ATA disk driver, as evolved from hd.c and ide.c.
  15  */
  16
  17 #include <linux/types.h>
  18 #include <linux/string.h>
  19 #include <linux/kernel.h>
  20 #include <linux/timer.h>
  21 #include <linux/mm.h>
  22 #include <linux/interrupt.h>
  23 #include <linux/major.h>
  24 #include <linux/errno.h>
  25 #include <linux/genhd.h>
  26 #include <linux/slab.h>
  27 #include <linux/delay.h>
  28 #include <linux/mutex.h>
  29 #include <linux/leds.h>
  30 #include <linux/ide.h>
  31 #include <linux/hdreg.h>
  32
  33 #include <asm/byteorder.h>
  34 #include <asm/irq.h>
  35 #include <asm/uaccess.h>
  36 #include <asm/io.h>
  37 #include <asm/div64.h>
  38
  39 #include "ide-disk.h"
  40
  41 static const u8 ide_rw_cmds[] = {
  42         ATA_CMD_READ_MULTI,
  43         ATA_CMD_WRITE_MULTI,
  44         ATA_CMD_READ_MULTI_EXT,
  45         ATA_CMD_WRITE_MULTI_EXT,
  46         ATA_CMD_PIO_READ,
  47         ATA_CMD_PIO_WRITE,
  48         ATA_CMD_PIO_READ_EXT,
  49         ATA_CMD_PIO_WRITE_EXT,
  50         ATA_CMD_READ,
  51         ATA_CMD_WRITE,
  52         ATA_CMD_READ_EXT,
  53         ATA_CMD_WRITE_EXT,
  54 };
  55
  56 static const u8 ide_data_phases[] = {
  57         TASKFILE_MULTI_IN,
  58         TASKFILE_MULTI_OUT,
  59         TASKFILE_IN,
  60         TASKFILE_OUT,
  61         TASKFILE_IN_DMA,
  62         TASKFILE_OUT_DMA,
  63 };
  64
  65 static void ide_tf_set_cmd(ide_drive_t *drive, struct ide_cmd *cmd, u8 dma)
  66 {
  67         u8 index, lba48, write;
  68
  69         lba48 = (cmd->tf_flags & IDE_TFLAG_LBA48) ? 2 : 0;
  70         write = (cmd->tf_flags & IDE_TFLAG_WRITE) ? 1 : 0;
  71
  72         if (dma)
  73                 index = 8;
  74         else
  75                 index = drive->mult_count ? 0 : 4;
  76
  77         cmd->tf.command = ide_rw_cmds[index + lba48 + write];
  78
  79         if (dma)
  80                 index = 8; /* fixup index */
  81
  82         cmd->data_phase = ide_data_phases[index / 2 + write];
  83 }
  84
  85 /*
  86  * __ide_do_rw_disk() issues READ and WRITE commands to a disk,
  87  * using LBA if supported, or CHS otherwise, to address sectors.
  88  */
  89 static ide_startstop_t __ide_do_rw_disk(ide_drive_t *drive, struct request *rq,
  90                                         sector_t block)
  91 {
  92         ide_hwif_t *hwif        = drive->hwif;
  93         u16 nsectors            = (u16)rq->nr_sectors;
  94         u8 lba48                = !!(drive->dev_flags & IDE_DFLAG_LBA48);
  95         u8 dma                  = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
  96         struct ide_cmd          cmd;
  97         struct ide_taskfile     *tf = &cmd.tf;
  98         ide_startstop_t         rc;
  99
 100         if ((hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA) && lba48 && dma) {
 101                 if (block + rq->nr_sectors > 1ULL << 28)
 102                         dma = 0;
 103                 else
 104                         lba48 = 0;
 105         }
 106
 107         memset(&cmd, 0, sizeof(cmd));
 108         cmd.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
 109
 110         if (dma == 0) {
 111                 ide_init_sg_cmd(&cmd, nsectors);
 112                 ide_map_sg(drive, rq);
 113         }
 114
 115         if (drive->dev_flags & IDE_DFLAG_LBA) {
 116                 if (lba48) {
 117                         pr_debug("%s: LBA=0x%012llx\n", drive->name,
 118                                         (unsigned long long)block);
 119
 120                         tf->hob_nsect = (nsectors >> 8) & 0xff;
 121                         tf->hob_lbal  = (u8)(block >> 24);
 122                         if (sizeof(block) != 4) {
 123                                 tf->hob_lbam = (u8)((u64)block >> 32);
 124                                 tf->hob_lbah = (u8)((u64)block >> 40);
 125                         }
 126
 127                         tf->nsect  = nsectors & 0xff;
 128                         tf->lbal   = (u8) block;
 129                         tf->lbam   = (u8)(block >>  8);
 130                         tf->lbah   = (u8)(block >> 16);
 131
 132                         cmd.tf_flags |= (IDE_TFLAG_LBA48 | IDE_TFLAG_HOB);
 133                 } else {
 134                         tf->nsect  = nsectors & 0xff;
 135                         tf->lbal   = block;
 136                         tf->lbam   = block >>= 8;
 137                         tf->lbah   = block >>= 8;
 138                         tf->device = (block >> 8) & 0xf;
 139                 }
 140
 141                 tf->device |= ATA_LBA;
 142         } else {
 143                 unsigned int sect, head, cyl, track;
 144
 145                 track = (int)block / drive->sect;
 146                 sect  = (int)block % drive->sect + 1;
 147                 head  = track % drive->head;
 148                 cyl   = track / drive->head;
 149
 150                 pr_debug("%s: CHS=%u/%u/%u\n", drive->name, cyl, head, sect);
 151
 152                 tf->nsect  = nsectors & 0xff;
 153                 tf->lbal   = sect;
 154                 tf->lbam   = cyl;
 155                 tf->lbah   = cyl >> 8;
 156                 tf->device = head;
 157         }
 158
 159         cmd.tf_flags |= IDE_TFLAG_FS;
 160
 161         if (rq_data_dir(rq))
 162                 cmd.tf_flags |= IDE_TFLAG_WRITE;
 163
 164         ide_tf_set_cmd(drive, &cmd, dma);
 165         cmd.rq = rq;
 166
 167         rc = do_rw_taskfile(drive, &cmd);
 168
 169         if (rc == ide_stopped && dma) {
 170                 /* fallback to PIO */
 171                 cmd.tf_flags |= IDE_TFLAG_DMA_PIO_FALLBACK;
 172                 ide_tf_set_cmd(drive, &cmd, 0);
 173                 ide_init_sg_cmd(&cmd, nsectors);
 174                 rc = do_rw_taskfile(drive, &cmd);
 175         }
 176
 177         return rc;
 178 }
 179
 180 /*
 181  * 268435455  == 137439 MB or 28bit limit
 182  * 320173056  == 163929 MB or 48bit addressing
 183  * 1073741822 == 549756 MB or 48bit addressing fake drive
 184  */
 185
 186 static ide_startstop_t ide_do_rw_disk(ide_drive_t *drive, struct request *rq,
 187                                       sector_t block)
 188 {
 189         ide_hwif_t *hwif = drive->hwif;
 190
 191         BUG_ON(drive->dev_flags & IDE_DFLAG_BLOCKED);
 192
 193         if (!blk_fs_request(rq)) {
 194                 blk_dump_rq_flags(rq, "ide_do_rw_disk - bad command");
 195                 ide_end_request(drive, 0, 0);
 196                 return ide_stopped;
 197         }
 198
 199         ledtrig_ide_activity();
 200
 201         pr_debug("%s: %sing: block=%llu, sectors=%lu, buffer=0x%08lx\n",
 202                  drive->name, rq_data_dir(rq) == READ ? "read" : "writ",
 203                  (unsigned long long)block, rq->nr_sectors,
 204                  (unsigned long)rq->buffer);
 205
 206         if (hwif->rw_disk)
 207                 hwif->rw_disk(drive, rq);
 208
 209         return __ide_do_rw_disk(drive, rq, block);
 210 }
 211
 212 /*
 213  * Queries for true maximum capacity of the drive.
 214  * Returns maximum LBA address (> 0) of the drive, 0 if failed.
 215  */
 216 static u64 idedisk_read_native_max_address(ide_drive_t *drive, int lba48)
 217 {
 218         struct ide_cmd cmd;
 219         struct ide_taskfile *tf = &cmd.tf;
 220         u64 addr = 0;
 221
 222         memset(&cmd, 0, sizeof(cmd));
 223         if (lba48)
 224                 tf->command = ATA_CMD_READ_NATIVE_MAX_EXT;
 225         else
 226                 tf->command = ATA_CMD_READ_NATIVE_MAX;
 227         tf->device  = ATA_LBA;
 228
 229         cmd.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
 230         if (lba48)
 231                 cmd.tf_flags |= (IDE_TFLAG_LBA48 | IDE_TFLAG_HOB);
 232
 233         ide_no_data_taskfile(drive, &cmd);
 234
 235         /* if OK, compute maximum address value */
 236         if ((tf->status & 0x01) == 0)
 237                 addr = ide_get_lba_addr(tf, lba48) + 1;
 238
 239         return addr;
 240 }
 241
 242 /*
 243  * Sets maximum virtual LBA address of the drive.
 244  * Returns new maximum virtual LBA address (> 0) or 0 on failure.
 245  */
 246 static u64 idedisk_set_max_address(ide_drive_t *drive, u64 addr_req, int lba48)
 247 {
 248         struct ide_cmd cmd;
 249         struct ide_taskfile *tf = &cmd.tf;
 250         u64 addr_set = 0;
 251
 252         addr_req--;
 253
 254         memset(&cmd, 0, sizeof(cmd));
 255         tf->lbal     = (addr_req >>  0) & 0xff;
 256         tf->lbam     = (addr_req >>= 8) & 0xff;
 257         tf->lbah     = (addr_req >>= 8) & 0xff;
 258         if (lba48) {
 259                 tf->hob_lbal = (addr_req >>= 8) & 0xff;
 260                 tf->hob_lbam = (addr_req >>= 8) & 0xff;
 261                 tf->hob_lbah = (addr_req >>= 8) & 0xff;
 262                 tf->command  = ATA_CMD_SET_MAX_EXT;
 263         } else {
 264                 tf->device   = (addr_req >>= 8) & 0x0f;
 265                 tf->command  = ATA_CMD_SET_MAX;
 266         }
 267         tf->device |= ATA_LBA;
 268
 269         cmd.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
 270         if (lba48)
 271                 cmd.tf_flags |= (IDE_TFLAG_LBA48 | IDE_TFLAG_HOB);
 272
 273         ide_no_data_taskfile(drive, &cmd);
 274
 275         /* if OK, compute maximum address value */
 276         if ((tf->status & 0x01) == 0)
 277                 addr_set = ide_get_lba_addr(tf, lba48) + 1;
 278
 279         return addr_set;
 280 }
 281
 282 static unsigned long long sectors_to_MB(unsigned long long n)
 283 {
 284         n <<= 9;                /* make it bytes */
 285         do_div(n, 1000000);     /* make it MB */
 286         return n;
 287 }
 288
 289 /*
 290  * Some disks report total number of sectors instead of
 291  * maximum sector address.  We list them here.
 292  */
 293 static const struct drive_list_entry hpa_list[] = {
 294         { "ST340823A",  NULL },
 295         { "ST320413A",  NULL },
 296         { "ST310211A",  NULL },
 297         { NULL,         NULL }
 298 };
 299
 300 static void idedisk_check_hpa(ide_drive_t *drive)
 301 {
 302         unsigned long long capacity, set_max;
 303         int lba48 = ata_id_lba48_enabled(drive->id);
 304
 305         capacity = drive->capacity64;
 306
 307         set_max = idedisk_read_native_max_address(drive, lba48);
 308
 309         if (ide_in_drive_list(drive->id, hpa_list)) {
 310                 /*
 311                  * Since we are inclusive wrt to firmware revisions do this
 312                  * extra check and apply the workaround only when needed.
 313                  */
 314                 if (set_max == capacity + 1)
 315                         set_max--;
 316         }
 317
 318         if (set_max <= capacity)
 319                 return;
 320
 321         printk(KERN_INFO "%s: Host Protected Area detected.\n"
 322                          "\tcurrent capacity is %llu sectors (%llu MB)\n"
 323                          "\tnative  capacity is %llu sectors (%llu MB)\n",
 324                          drive->name,
 325                          capacity, sectors_to_MB(capacity),
 326                          set_max, sectors_to_MB(set_max));
 327
 328         set_max = idedisk_set_max_address(drive, set_max, lba48);
 329
 330         if (set_max) {
 331                 drive->capacity64 = set_max;
 332                 printk(KERN_INFO "%s: Host Protected Area disabled.\n",
 333                                  drive->name);
 334         }
 335 }
 336
 337 static int ide_disk_get_capacity(ide_drive_t *drive)
 338 {
 339         u16 *id = drive->id;
 340         int lba;
 341
 342         if (ata_id_lba48_enabled(id)) {
 343                 /* drive speaks 48-bit LBA */
 344                 lba = 1;
 345                 drive->capacity64 = ata_id_u64(id, ATA_ID_LBA_CAPACITY_2);
 346         } else if (ata_id_has_lba(id) && ata_id_is_lba_capacity_ok(id)) {
 347                 /* drive speaks 28-bit LBA */
 348                 lba = 1;
 349                 drive->capacity64 = ata_id_u32(id, ATA_ID_LBA_CAPACITY);
 350         } else {
 351                 /* drive speaks boring old 28-bit CHS */
 352                 lba = 0;
 353                 drive->capacity64 = drive->cyl * drive->head * drive->sect;
 354         }
 355
 356         if (lba) {
 357                 drive->dev_flags |= IDE_DFLAG_LBA;
 358
 359                 /*
 360                 * If this device supports the Host Protected Area feature set,
 361                 * then we may need to change our opinion about its capacity.
 362                 */
 363                 if (ata_id_hpa_enabled(id))
 364                         idedisk_check_hpa(drive);
 365         }
 366
 367         /* limit drive capacity to 137GB if LBA48 cannot be used */
 368         if ((drive->dev_flags & IDE_DFLAG_LBA48) == 0 &&
 369             drive->capacity64 > 1ULL << 28) {
 370                 printk(KERN_WARNING "%s: cannot use LBA48 - full capacity "
 371                        "%llu sectors (%llu MB)\n",
 372                        drive->name, (unsigned long long)drive->capacity64,
 373                        sectors_to_MB(drive->capacity64));
 374                 drive->capacity64 = 1ULL << 28;
 375         }
 376
 377         if ((drive->hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA) &&
 378             (drive->dev_flags & IDE_DFLAG_LBA48)) {
 379                 if (drive->capacity64 > 1ULL << 28) {
 380                         printk(KERN_INFO "%s: cannot use LBA48 DMA - PIO mode"
 381                                          " will be used for accessing sectors "
 382                                          "> %u\n", drive->name, 1 << 28);
 383                 } else
 384                         drive->dev_flags &= ~IDE_DFLAG_LBA48;
 385         }
 386
 387         return 0;
 388 }
 389
 390 static void idedisk_prepare_flush(struct request_queue *q, struct request *rq)
 391 {
 392         ide_drive_t *drive = q->queuedata;
 393         struct ide_cmd *cmd = kmalloc(sizeof(*cmd), GFP_ATOMIC);
 394
 395         /* FIXME: map struct ide_taskfile on rq->cmd[] */
 396         BUG_ON(cmd == NULL);
 397
 398         memset(cmd, 0, sizeof(*cmd));
 399         if (ata_id_flush_ext_enabled(drive->id) &&
 400             (drive->capacity64 >= (1UL << 28)))
 401                 cmd->tf.command = ATA_CMD_FLUSH_EXT;
 402         else
 403                 cmd->tf.command = ATA_CMD_FLUSH;
 404         cmd->tf_flags    = IDE_TFLAG_OUT_TF | IDE_TFLAG_OUT_DEVICE |
 405                            IDE_TFLAG_DYN;
 406         cmd->data_phase = TASKFILE_NO_DATA;
 407
 408         rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
 409         rq->cmd_flags |= REQ_SOFTBARRIER;
 410         rq->special = cmd;
 411 }
 412
 413 ide_devset_get(multcount, mult_count);
 414
 415 /*
 416  * This is tightly woven into the driver->do_special can not touch.
 417  * DON'T do it again until a total personality rewrite is committed.
 418  */
 419 static int set_multcount(ide_drive_t *drive, int arg)
 420 {
 421         struct request *rq;
 422         int error;
 423
 424         if (arg < 0 || arg > (drive->id[ATA_ID_MAX_MULTSECT] & 0xff))
 425                 return -EINVAL;
 426
 427         if (drive->special.b.set_multmode)
 428                 return -EBUSY;
 429
 430         rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
 431         rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
 432
 433         drive->mult_req = arg;
 434         drive->special.b.set_multmode = 1;
 435         error = blk_execute_rq(drive->queue, NULL, rq, 0);
 436         blk_put_request(rq);
 437
 438         return (drive->mult_count == arg) ? 0 : -EIO;
 439 }
 440
 441 ide_devset_get_flag(nowerr, IDE_DFLAG_NOWERR);
 442
 443 static int set_nowerr(ide_drive_t *drive, int arg)
 444 {
 445         if (arg < 0 || arg > 1)
 446                 return -EINVAL;
 447
 448         if (arg)
 449                 drive->dev_flags |= IDE_DFLAG_NOWERR;
 450         else
 451                 drive->dev_flags &= ~IDE_DFLAG_NOWERR;
 452
 453         drive->bad_wstat = arg ? BAD_R_STAT : BAD_W_STAT;
 454
 455         return 0;
 456 }
 457
 458 static int ide_do_setfeature(ide_drive_t *drive, u8 feature, u8 nsect)
 459 {
 460         struct ide_cmd cmd;
 461
 462         memset(&cmd, 0, sizeof(cmd));
 463         cmd.tf.feature = feature;
 464         cmd.tf.nsect   = nsect;
 465         cmd.tf.command = ATA_CMD_SET_FEATURES;
 466         cmd.tf_flags   = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
 467
 468         return ide_no_data_taskfile(drive, &cmd);
 469 }
 470
 471 static void update_ordered(ide_drive_t *drive)
 472 {
 473         u16 *id = drive->id;
 474         unsigned ordered = QUEUE_ORDERED_NONE;
 475         prepare_flush_fn *prep_fn = NULL;
 476
 477         if (drive->dev_flags & IDE_DFLAG_WCACHE) {
 478                 unsigned long long capacity;
 479                 int barrier;
 480                 /*
 481                  * We must avoid issuing commands a drive does not
 482                  * understand or we may crash it. We check flush cache
 483                  * is supported. We also check we have the LBA48 flush
 484                  * cache if the drive capacity is too large. By this
 485                  * time we have trimmed the drive capacity if LBA48 is
 486                  * not available so we don't need to recheck that.
 487                  */
 488                 capacity = ide_gd_capacity(drive);
 489                 barrier = ata_id_flush_enabled(id) &&
 490                         (drive->dev_flags & IDE_DFLAG_NOFLUSH) == 0 &&
 491                         ((drive->dev_flags & IDE_DFLAG_LBA48) == 0 ||
 492                          capacity <= (1ULL << 28) ||
 493                          ata_id_flush_ext_enabled(id));
 494
 495                 printk(KERN_INFO "%s: cache flushes %ssupported\n",
 496                        drive->name, barrier ? "" : "not ");
 497
 498                 if (barrier) {
 499                         ordered = QUEUE_ORDERED_DRAIN_FLUSH;
 500                         prep_fn = idedisk_prepare_flush;
 501                 }
 502         } else
 503                 ordered = QUEUE_ORDERED_DRAIN;
 504
 505         blk_queue_ordered(drive->queue, ordered, prep_fn);
 506 }
 507
 508 ide_devset_get_flag(wcache, IDE_DFLAG_WCACHE);
 509
 510 static int set_wcache(ide_drive_t *drive, int arg)
 511 {
 512         int err = 1;
 513
 514         if (arg < 0 || arg > 1)
 515                 return -EINVAL;
 516
 517         if (ata_id_flush_enabled(drive->id)) {
 518                 err = ide_do_setfeature(drive,
 519                         arg ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF, 0);
 520                 if (err == 0) {
 521                         if (arg)
 522                                 drive->dev_flags |= IDE_DFLAG_WCACHE;
 523                         else
 524                                 drive->dev_flags &= ~IDE_DFLAG_WCACHE;
 525                 }
 526         }
 527
 528         update_ordered(drive);
 529
 530         return err;
 531 }
 532
 533 static int do_idedisk_flushcache(ide_drive_t *drive)
 534 {
 535         struct ide_cmd cmd;
 536
 537         memset(&cmd, 0, sizeof(cmd));
 538         if (ata_id_flush_ext_enabled(drive->id))
 539                 cmd.tf.command = ATA_CMD_FLUSH_EXT;
 540         else
 541                 cmd.tf.command = ATA_CMD_FLUSH;
 542         cmd.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
 543
 544         return ide_no_data_taskfile(drive, &cmd);
 545 }
 546
 547 ide_devset_get(acoustic, acoustic);
 548
 549 static int set_acoustic(ide_drive_t *drive, int arg)
 550 {
 551         if (arg < 0 || arg > 254)
 552                 return -EINVAL;
 553
 554         ide_do_setfeature(drive,
 555                 arg ? SETFEATURES_AAM_ON : SETFEATURES_AAM_OFF, arg);
 556
 557         drive->acoustic = arg;
 558
 559         return 0;
 560 }
 561
 562 ide_devset_get_flag(addressing, IDE_DFLAG_LBA48);
 563
 564 /*
 565  * drive->addressing:
 566  *      0: 28-bit
 567  *      1: 48-bit
 568  *      2: 48-bit capable doing 28-bit
 569  */
 570 static int set_addressing(ide_drive_t *drive, int arg)
 571 {
 572         if (arg < 0 || arg > 2)
 573                 return -EINVAL;
 574
 575         if (arg && ((drive->hwif->host_flags & IDE_HFLAG_NO_LBA48) ||
 576             ata_id_lba48_enabled(drive->id) == 0))
 577                 return -EIO;
 578
 579         if (arg == 2)
 580                 arg = 0;
 581
 582         if (arg)
 583                 drive->dev_flags |= IDE_DFLAG_LBA48;
 584         else
 585                 drive->dev_flags &= ~IDE_DFLAG_LBA48;
 586
 587         return 0;
 588 }
 589
 590 ide_ext_devset_rw(acoustic, acoustic);
 591 ide_ext_devset_rw(address, addressing);
 592 ide_ext_devset_rw(multcount, multcount);
 593 ide_ext_devset_rw(wcache, wcache);
 594
 595 ide_ext_devset_rw_sync(nowerr, nowerr);
 596
 597 static int ide_disk_check(ide_drive_t *drive, const char *s)
 598 {
 599         return 1;
 600 }
 601
 602 static void ide_disk_setup(ide_drive_t *drive)
 603 {
 604         struct ide_disk_obj *idkp = drive->driver_data;
 605         struct request_queue *q = drive->queue;
 606         ide_hwif_t *hwif = drive->hwif;
 607         u16 *id = drive->id;
 608         char *m = (char *)&id[ATA_ID_PROD];
 609         unsigned long long capacity;
 610
 611         ide_proc_register_driver(drive, idkp->driver);
 612
 613         if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0)
 614                 return;
 615
 616         if (drive->dev_flags & IDE_DFLAG_REMOVABLE) {
 617                 /*
 618                  * Removable disks (eg. SYQUEST); ignore 'WD' drives
 619                  */
 620                 if (m[0] != 'W' || m[1] != 'D')
 621                         drive->dev_flags |= IDE_DFLAG_DOORLOCKING;
 622         }
 623
 624         (void)set_addressing(drive, 1);
 625
 626         if (drive->dev_flags & IDE_DFLAG_LBA48) {
 627                 int max_s = 2048;
 628
 629                 if (max_s > hwif->rqsize)
 630                         max_s = hwif->rqsize;
 631
 632                 blk_queue_max_sectors(q, max_s);
 633         }
 634
 635         printk(KERN_INFO "%s: max request size: %dKiB\n", drive->name,
 636                 q->max_sectors / 2);
 637
 638         if (ata_id_is_ssd(id))
 639                 queue_flag_set_unlocked(QUEUE_FLAG_NONROT, q);
 640
 641         /* calculate drive capacity, and select LBA if possible */
 642         ide_disk_get_capacity(drive);
 643
 644         /*
 645          * if possible, give fdisk access to more of the drive,
 646          * by correcting bios_cyls:
 647          */
 648         capacity = ide_gd_capacity(drive);
 649
 650         if ((drive->dev_flags & IDE_DFLAG_FORCED_GEOM) == 0) {
 651                 if (ata_id_lba48_enabled(drive->id)) {
 652                         /* compatibility */
 653                         drive->bios_sect = 63;
 654                         drive->bios_head = 255;
 655                 }
 656
 657                 if (drive->bios_sect && drive->bios_head) {
 658                         unsigned int cap0 = capacity; /* truncate to 32 bits */
 659                         unsigned int cylsz, cyl;
 660
 661                         if (cap0 != capacity)
 662                                 drive->bios_cyl = 65535;
 663                         else {
 664                                 cylsz = drive->bios_sect * drive->bios_head;
 665                                 cyl = cap0 / cylsz;
 666                                 if (cyl > 65535)
 667                                         cyl = 65535;
 668                                 if (cyl > drive->bios_cyl)
 669                                         drive->bios_cyl = cyl;
 670                         }
 671                 }
 672         }
 673         printk(KERN_INFO "%s: %llu sectors (%llu MB)",
 674                          drive->name, capacity, sectors_to_MB(capacity));
 675
 676         /* Only print cache size when it was specified */
 677         if (id[ATA_ID_BUF_SIZE])
 678                 printk(KERN_CONT " w/%dKiB Cache", id[ATA_ID_BUF_SIZE] / 2);
 679
 680         printk(KERN_CONT ", CHS=%d/%d/%d\n",
 681                          drive->bios_cyl, drive->bios_head, drive->bios_sect);
 682
 683         /* write cache enabled? */
 684         if ((id[ATA_ID_CSFO] & 1) || ata_id_wcache_enabled(id))
 685                 drive->dev_flags |= IDE_DFLAG_WCACHE;
 686
 687         set_wcache(drive, 1);
 688
 689         if ((drive->dev_flags & IDE_DFLAG_LBA) == 0 &&
 690             (drive->head == 0 || drive->head > 16)) {
 691                 printk(KERN_ERR "%s: invalid geometry: %d physical heads?\n",
 692                         drive->name, drive->head);
 693                 drive->dev_flags &= ~IDE_DFLAG_ATTACH;
 694         } else
 695                 drive->dev_flags |= IDE_DFLAG_ATTACH;
 696 }
 697
 698 static void ide_disk_flush(ide_drive_t *drive)
 699 {
 700         if (ata_id_flush_enabled(drive->id) == 0 ||
 701             (drive->dev_flags & IDE_DFLAG_WCACHE) == 0)
 702                 return;
 703
 704         if (do_idedisk_flushcache(drive))
 705                 printk(KERN_INFO "%s: wcache flush failed!\n", drive->name);
 706 }
 707
 708 static int ide_disk_init_media(ide_drive_t *drive, struct gendisk *disk)
 709 {
 710         return 0;
 711 }
 712
 713 static int ide_disk_set_doorlock(ide_drive_t *drive, struct gendisk *disk,
 714                                  int on)
 715 {
 716         struct ide_cmd cmd;
 717         int ret;
 718
 719         if ((drive->dev_flags & IDE_DFLAG_DOORLOCKING) == 0)
 720                 return 0;
 721
 722         memset(&cmd, 0, sizeof(cmd));
 723         cmd.tf.command = on ? ATA_CMD_MEDIA_LOCK : ATA_CMD_MEDIA_UNLOCK;
 724         cmd.tf_flags   = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
 725
 726         ret = ide_no_data_taskfile(drive, &cmd);
 727
 728         if (ret)
 729                 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
 730
 731         return ret;
 732 }
 733
 734 const struct ide_disk_ops ide_ata_disk_ops = {
 735         .check          = ide_disk_check,
 736         .get_capacity   = ide_disk_get_capacity,
 737         .setup          = ide_disk_setup,
 738         .flush          = ide_disk_flush,
 739         .init_media     = ide_disk_init_media,
 740         .set_doorlock   = ide_disk_set_doorlock,
 741         .do_request     = ide_do_rw_disk,
 742         .ioctl          = ide_disk_ioctl,
 743 };