git.oblomov.eu Git - 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
  32 #include <asm/byteorder.h>
  33 #include <asm/irq.h>
  34 #include <asm/uaccess.h>
  35 #include <asm/io.h>
  36 #include <asm/div64.h>
  37
  38 #include "ide-disk.h"
  39
  40 static const u8 ide_rw_cmds[] = {
  41         ATA_CMD_READ_MULTI,
  42         ATA_CMD_WRITE_MULTI,
  43         ATA_CMD_READ_MULTI_EXT,
  44         ATA_CMD_WRITE_MULTI_EXT,
  45         ATA_CMD_PIO_READ,
  46         ATA_CMD_PIO_WRITE,
  47         ATA_CMD_PIO_READ_EXT,
  48         ATA_CMD_PIO_WRITE_EXT,
  49         ATA_CMD_READ,
  50         ATA_CMD_WRITE,
  51         ATA_CMD_READ_EXT,
  52         ATA_CMD_WRITE_EXT,
  53 };
  54
  55 static void ide_tf_set_cmd(ide_drive_t *drive, struct ide_cmd *cmd, u8 dma)
  56 {
  57         u8 index, lba48, write;
  58
  59         lba48 = (cmd->tf_flags & IDE_TFLAG_LBA48) ? 2 : 0;
  60         write = (cmd->tf_flags & IDE_TFLAG_WRITE) ? 1 : 0;
  61
  62         if (dma) {
  63                 cmd->protocol = ATA_PROT_DMA;
  64                 index = 8;
  65         } else {
  66                 cmd->protocol = ATA_PROT_PIO;
  67                 if (drive->mult_count) {
  68                         cmd->tf_flags |= IDE_TFLAG_MULTI_PIO;
  69                         index = 0;
  70                 } else
  71                         index = 4;
  72         }
  73
  74         cmd->tf.command = ide_rw_cmds[index + lba48 + write];
  75 }
  76
  77 /*
  78  * __ide_do_rw_disk() issues READ and WRITE commands to a disk,
  79  * using LBA if supported, or CHS otherwise, to address sectors.
  80  */
  81 static ide_startstop_t __ide_do_rw_disk(ide_drive_t *drive, struct request *rq,
  82                                         sector_t block)
  83 {
  84         ide_hwif_t *hwif        = drive->hwif;
  85         u16 nsectors            = (u16)rq->nr_sectors;
  86         u8 lba48                = !!(drive->dev_flags & IDE_DFLAG_LBA48);
  87         u8 dma                  = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
  88         struct ide_cmd          cmd;
  89         struct ide_taskfile     *tf = &cmd.tf;
  90         ide_startstop_t         rc;
  91
  92         if ((hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA) && lba48 && dma) {
  93                 if (block + rq->nr_sectors > 1ULL << 28)
  94                         dma = 0;
  95                 else
  96                         lba48 = 0;
  97         }
  98
  99         memset(&cmd, 0, sizeof(cmd));
 100         cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
 101         cmd.valid.in.tf  = IDE_VALID_IN_TF  | IDE_VALID_DEVICE;
 102
 103         if (drive->dev_flags & IDE_DFLAG_LBA) {
 104                 if (lba48) {
 105                         pr_debug("%s: LBA=0x%012llx\n", drive->name,
 106                                         (unsigned long long)block);
 107
 108                         tf->nsect  = nsectors & 0xff;
 109                         tf->lbal   = (u8) block;
 110                         tf->lbam   = (u8)(block >>  8);
 111                         tf->lbah   = (u8)(block >> 16);
 112                         tf->device = ATA_LBA;
 113
 114                         tf = &cmd.hob;
 115                         tf->nsect = (nsectors >> 8) & 0xff;
 116                         tf->lbal  = (u8)(block >> 24);
 117                         if (sizeof(block) != 4) {
 118                                 tf->lbam = (u8)((u64)block >> 32);
 119                                 tf->lbah = (u8)((u64)block >> 40);
 120                         }
 121
 122                         cmd.valid.out.hob = IDE_VALID_OUT_HOB;
 123                         cmd.valid.in.hob  = IDE_VALID_IN_HOB;
 124                         cmd.tf_flags |= IDE_TFLAG_LBA48;
 125                 } else {
 126                         tf->nsect  = nsectors & 0xff;
 127                         tf->lbal   = block;
 128                         tf->lbam   = block >>= 8;
 129                         tf->lbah   = block >>= 8;
 130                         tf->device = ((block >> 8) & 0xf) | ATA_LBA;
 131                 }
 132         } else {
 133                 unsigned int sect, head, cyl, track;
 134
 135                 track = (int)block / drive->sect;
 136                 sect  = (int)block % drive->sect + 1;
 137                 head  = track % drive->head;
 138                 cyl   = track / drive->head;
 139
 140                 pr_debug("%s: CHS=%u/%u/%u\n", drive->name, cyl, head, sect);
 141
 142                 tf->nsect  = nsectors & 0xff;
 143                 tf->lbal   = sect;
 144                 tf->lbam   = cyl;
 145                 tf->lbah   = cyl >> 8;
 146                 tf->device = head;
 147         }
 148
 149         cmd.tf_flags |= IDE_TFLAG_FS;
 150
 151         if (rq_data_dir(rq))
 152                 cmd.tf_flags |= IDE_TFLAG_WRITE;
 153
 154         ide_tf_set_cmd(drive, &cmd, dma);
 155         cmd.rq = rq;
 156
 157         if (dma == 0) {
 158                 ide_init_sg_cmd(&cmd, nsectors << 9);
 159                 ide_map_sg(drive, &cmd);
 160         }
 161
 162         rc = do_rw_taskfile(drive, &cmd);
 163
 164         if (rc == ide_stopped && dma) {
 165                 /* fallback to PIO */
 166                 cmd.tf_flags |= IDE_TFLAG_DMA_PIO_FALLBACK;
 167                 ide_tf_set_cmd(drive, &cmd, 0);
 168                 ide_init_sg_cmd(&cmd, nsectors << 9);
 169                 rc = do_rw_taskfile(drive, &cmd);
 170         }
 171
 172         return rc;
 173 }
 174
 175 /*
 176  * 268435455  == 137439 MB or 28bit limit
 177  * 320173056  == 163929 MB or 48bit addressing
 178  * 1073741822 == 549756 MB or 48bit addressing fake drive
 179  */
 180
 181 static ide_startstop_t ide_do_rw_disk(ide_drive_t *drive, struct request *rq,
 182                                       sector_t block)
 183 {
 184         ide_hwif_t *hwif = drive->hwif;
 185
 186         BUG_ON(drive->dev_flags & IDE_DFLAG_BLOCKED);
 187
 188         if (!blk_fs_request(rq)) {
 189                 blk_dump_rq_flags(rq, "ide_do_rw_disk - bad command");
 190                 if (rq->errors == 0)
 191                         rq->errors = -EIO;
 192                 ide_complete_rq(drive, -EIO, ide_rq_bytes(rq));
 193                 return ide_stopped;
 194         }
 195
 196         ledtrig_ide_activity();
 197
 198         pr_debug("%s: %sing: block=%llu, sectors=%lu, buffer=0x%08lx\n",
 199                  drive->name, rq_data_dir(rq) == READ ? "read" : "writ",
 200                  (unsigned long long)block, rq->nr_sectors,
 201                  (unsigned long)rq->buffer);
 202
 203         if (hwif->rw_disk)
 204                 hwif->rw_disk(drive, rq);
 205
 206         return __ide_do_rw_disk(drive, rq, block);
 207 }
 208
 209 /*
 210  * Queries for true maximum capacity of the drive.
 211  * Returns maximum LBA address (> 0) of the drive, 0 if failed.
 212  */
 213 static u64 idedisk_read_native_max_address(ide_drive_t *drive, int lba48)
 214 {
 215         struct ide_cmd cmd;
 216         struct ide_taskfile *tf = &cmd.tf;
 217         u64 addr = 0;
 218
 219         memset(&cmd, 0, sizeof(cmd));
 220         if (lba48)
 221                 tf->command = ATA_CMD_READ_NATIVE_MAX_EXT;
 222         else
 223                 tf->command = ATA_CMD_READ_NATIVE_MAX;
 224         tf->device  = ATA_LBA;
 225
 226         cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
 227         cmd.valid.in.tf  = IDE_VALID_IN_TF  | IDE_VALID_DEVICE;
 228         if (lba48) {
 229                 cmd.valid.out.hob = IDE_VALID_OUT_HOB;
 230                 cmd.valid.in.hob  = IDE_VALID_IN_HOB;
 231                 cmd.tf_flags = IDE_TFLAG_LBA48;
 232         }
 233
 234         ide_no_data_taskfile(drive, &cmd);
 235
 236         /* if OK, compute maximum address value */
 237         if (!(tf->status & ATA_ERR))
 238                 addr = ide_get_lba_addr(&cmd, lba48) + 1;
 239
 240         return addr;
 241 }
 242
 243 /*
 244  * Sets maximum virtual LBA address of the drive.
 245  * Returns new maximum virtual LBA address (> 0) or 0 on failure.
 246  */
 247 static u64 idedisk_set_max_address(ide_drive_t *drive, u64 addr_req, int lba48)
 248 {
 249         struct ide_cmd cmd;
 250         struct ide_taskfile *tf = &cmd.tf;
 251         u64 addr_set = 0;
 252
 253         addr_req--;
 254
 255         memset(&cmd, 0, sizeof(cmd));
 256         tf->lbal     = (addr_req >>  0) & 0xff;
 257         tf->lbam     = (addr_req >>= 8) & 0xff;
 258         tf->lbah     = (addr_req >>= 8) & 0xff;
 259         if (lba48) {
 260                 cmd.hob.lbal = (addr_req >>= 8) & 0xff;
 261                 cmd.hob.lbam = (addr_req >>= 8) & 0xff;
 262                 cmd.hob.lbah = (addr_req >>= 8) & 0xff;
 263                 tf->command  = ATA_CMD_SET_MAX_EXT;
 264         } else {
 265                 tf->device   = (addr_req >>= 8) & 0x0f;
 266                 tf->command  = ATA_CMD_SET_MAX;
 267         }
 268         tf->device |= ATA_LBA;
 269
 270         cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
 271         cmd.valid.in.tf  = IDE_VALID_IN_TF  | IDE_VALID_DEVICE;
 272         if (lba48) {
 273                 cmd.valid.out.hob = IDE_VALID_OUT_HOB;
 274                 cmd.valid.in.hob  = IDE_VALID_IN_HOB;
 275                 cmd.tf_flags = IDE_TFLAG_LBA48;
 276         }
 277
 278         ide_no_data_taskfile(drive, &cmd);
 279
 280         /* if OK, compute maximum address value */
 281         if (!(tf->status & ATA_ERR))
 282                 addr_set = ide_get_lba_addr(&cmd, lba48) + 1;
 283
 284         return addr_set;
 285 }
 286
 287 static unsigned long long sectors_to_MB(unsigned long long n)
 288 {
 289         n <<= 9;                /* make it bytes */
 290         do_div(n, 1000000);     /* make it MB */
 291         return n;
 292 }
 293
 294 /*
 295  * Some disks report total number of sectors instead of
 296  * maximum sector address.  We list them here.
 297  */
 298 static const struct drive_list_entry hpa_list[] = {
 299         { "ST340823A",  NULL },
 300         { "ST320413A",  NULL },
 301         { "ST310211A",  NULL },
 302         { NULL,         NULL }
 303 };
 304
 305 static void idedisk_check_hpa(ide_drive_t *drive)
 306 {
 307         unsigned long long capacity, set_max;
 308         int lba48 = ata_id_lba48_enabled(drive->id);
 309
 310         capacity = drive->capacity64;
 311
 312         set_max = idedisk_read_native_max_address(drive, lba48);
 313
 314         if (ide_in_drive_list(drive->id, hpa_list)) {
 315                 /*
 316                  * Since we are inclusive wrt to firmware revisions do this
 317                  * extra check and apply the workaround only when needed.
 318                  */
 319                 if (set_max == capacity + 1)
 320                         set_max--;
 321         }
 322
 323         if (set_max <= capacity)
 324                 return;
 325
 326         printk(KERN_INFO "%s: Host Protected Area detected.\n"
 327                          "\tcurrent capacity is %llu sectors (%llu MB)\n"
 328                          "\tnative  capacity is %llu sectors (%llu MB)\n",
 329                          drive->name,
 330                          capacity, sectors_to_MB(capacity),
 331                          set_max, sectors_to_MB(set_max));
 332
 333         set_max = idedisk_set_max_address(drive, set_max, lba48);
 334
 335         if (set_max) {
 336                 drive->capacity64 = set_max;
 337                 printk(KERN_INFO "%s: Host Protected Area disabled.\n",
 338                                  drive->name);
 339         }
 340 }
 341
 342 static int ide_disk_get_capacity(ide_drive_t *drive)
 343 {
 344         u16 *id = drive->id;
 345         int lba;
 346
 347         if (ata_id_lba48_enabled(id)) {
 348                 /* drive speaks 48-bit LBA */
 349                 lba = 1;
 350                 drive->capacity64 = ata_id_u64(id, ATA_ID_LBA_CAPACITY_2);
 351         } else if (ata_id_has_lba(id) && ata_id_is_lba_capacity_ok(id)) {
 352                 /* drive speaks 28-bit LBA */
 353                 lba = 1;
 354                 drive->capacity64 = ata_id_u32(id, ATA_ID_LBA_CAPACITY);
 355         } else {
 356                 /* drive speaks boring old 28-bit CHS */
 357                 lba = 0;
 358                 drive->capacity64 = drive->cyl * drive->head * drive->sect;
 359         }
 360
 361         if (lba) {
 362                 drive->dev_flags |= IDE_DFLAG_LBA;
 363
 364                 /*
 365                 * If this device supports the Host Protected Area feature set,
 366                 * then we may need to change our opinion about its capacity.
 367                 */
 368                 if (ata_id_hpa_enabled(id))
 369                         idedisk_check_hpa(drive);
 370         }
 371
 372         /* limit drive capacity to 137GB if LBA48 cannot be used */
 373         if ((drive->dev_flags & IDE_DFLAG_LBA48) == 0 &&
 374             drive->capacity64 > 1ULL << 28) {
 375                 printk(KERN_WARNING "%s: cannot use LBA48 - full capacity "
 376                        "%llu sectors (%llu MB)\n",
 377                        drive->name, (unsigned long long)drive->capacity64,
 378                        sectors_to_MB(drive->capacity64));
 379                 drive->capacity64 = 1ULL << 28;
 380         }
 381
 382         if ((drive->hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA) &&
 383             (drive->dev_flags & IDE_DFLAG_LBA48)) {
 384                 if (drive->capacity64 > 1ULL << 28) {
 385                         printk(KERN_INFO "%s: cannot use LBA48 DMA - PIO mode"
 386                                          " will be used for accessing sectors "
 387                                          "> %u\n", drive->name, 1 << 28);
 388                 } else
 389                         drive->dev_flags &= ~IDE_DFLAG_LBA48;
 390         }
 391
 392         return 0;
 393 }
 394
 395 static void idedisk_prepare_flush(struct request_queue *q, struct request *rq)
 396 {
 397         ide_drive_t *drive = q->queuedata;
 398         struct ide_cmd *cmd = kmalloc(sizeof(*cmd), GFP_ATOMIC);
 399
 400         /* FIXME: map struct ide_taskfile on rq->cmd[] */
 401         BUG_ON(cmd == NULL);
 402
 403         memset(cmd, 0, sizeof(*cmd));
 404         if (ata_id_flush_ext_enabled(drive->id) &&
 405             (drive->capacity64 >= (1UL << 28)))
 406                 cmd->tf.command = ATA_CMD_FLUSH_EXT;
 407         else
 408                 cmd->tf.command = ATA_CMD_FLUSH;
 409         cmd->valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
 410         cmd->tf_flags = IDE_TFLAG_DYN;
 411         cmd->protocol = ATA_PROT_NODATA;
 412
 413         rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
 414         rq->special = cmd;
 415 }
 416
 417 ide_devset_get(multcount, mult_count);
 418
 419 /*
 420  * This is tightly woven into the driver->do_special can not touch.
 421  * DON'T do it again until a total personality rewrite is committed.
 422  */
 423 static int set_multcount(ide_drive_t *drive, int arg)
 424 {
 425         struct request *rq;
 426         int error;
 427
 428         if (arg < 0 || arg > (drive->id[ATA_ID_MAX_MULTSECT] & 0xff))
 429                 return -EINVAL;
 430
 431         if (drive->special.b.set_multmode)
 432                 return -EBUSY;
 433
 434         rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
 435         rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
 436
 437         drive->mult_req = arg;
 438         drive->special.b.set_multmode = 1;
 439         error = blk_execute_rq(drive->queue, NULL, rq, 0);
 440         blk_put_request(rq);
 441
 442         return (drive->mult_count == arg) ? 0 : -EIO;
 443 }
 444
 445 ide_devset_get_flag(nowerr, IDE_DFLAG_NOWERR);
 446
 447 static int set_nowerr(ide_drive_t *drive, int arg)
 448 {
 449         if (arg < 0 || arg > 1)
 450                 return -EINVAL;
 451
 452         if (arg)
 453                 drive->dev_flags |= IDE_DFLAG_NOWERR;
 454         else
 455                 drive->dev_flags &= ~IDE_DFLAG_NOWERR;
 456
 457         drive->bad_wstat = arg ? BAD_R_STAT : BAD_W_STAT;
 458
 459         return 0;
 460 }
 461
 462 static int ide_do_setfeature(ide_drive_t *drive, u8 feature, u8 nsect)
 463 {
 464         struct ide_cmd cmd;
 465
 466         memset(&cmd, 0, sizeof(cmd));
 467         cmd.tf.feature = feature;
 468         cmd.tf.nsect   = nsect;
 469         cmd.tf.command = ATA_CMD_SET_FEATURES;
 470         cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
 471         cmd.valid.in.tf  = IDE_VALID_IN_TF  | IDE_VALID_DEVICE;
 472
 473         return ide_no_data_taskfile(drive, &cmd);
 474 }
 475
 476 static void update_ordered(ide_drive_t *drive)
 477 {
 478         u16 *id = drive->id;
 479         unsigned ordered = QUEUE_ORDERED_NONE;
 480         prepare_flush_fn *prep_fn = NULL;
 481
 482         if (drive->dev_flags & IDE_DFLAG_WCACHE) {
 483                 unsigned long long capacity;
 484                 int barrier;
 485                 /*
 486                  * We must avoid issuing commands a drive does not
 487                  * understand or we may crash it. We check flush cache
 488                  * is supported. We also check we have the LBA48 flush
 489                  * cache if the drive capacity is too large. By this
 490                  * time we have trimmed the drive capacity if LBA48 is
 491                  * not available so we don't need to recheck that.
 492                  */
 493                 capacity = ide_gd_capacity(drive);
 494                 barrier = ata_id_flush_enabled(id) &&
 495                         (drive->dev_flags & IDE_DFLAG_NOFLUSH) == 0 &&
 496                         ((drive->dev_flags & IDE_DFLAG_LBA48) == 0 ||
 497                          capacity <= (1ULL << 28) ||
 498                          ata_id_flush_ext_enabled(id));
 499
 500                 printk(KERN_INFO "%s: cache flushes %ssupported\n",
 501                        drive->name, barrier ? "" : "not ");
 502
 503                 if (barrier) {
 504                         ordered = QUEUE_ORDERED_DRAIN_FLUSH;
 505                         prep_fn = idedisk_prepare_flush;
 506                 }
 507         } else
 508                 ordered = QUEUE_ORDERED_DRAIN;
 509
 510         blk_queue_ordered(drive->queue, ordered, prep_fn);
 511 }
 512
 513 ide_devset_get_flag(wcache, IDE_DFLAG_WCACHE);
 514
 515 static int set_wcache(ide_drive_t *drive, int arg)
 516 {
 517         int err = 1;
 518
 519         if (arg < 0 || arg > 1)
 520                 return -EINVAL;
 521
 522         if (ata_id_flush_enabled(drive->id)) {
 523                 err = ide_do_setfeature(drive,
 524                         arg ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF, 0);
 525                 if (err == 0) {
 526                         if (arg)
 527                                 drive->dev_flags |= IDE_DFLAG_WCACHE;
 528                         else
 529                                 drive->dev_flags &= ~IDE_DFLAG_WCACHE;
 530                 }
 531         }
 532
 533         update_ordered(drive);
 534
 535         return err;
 536 }
 537
 538 static int do_idedisk_flushcache(ide_drive_t *drive)
 539 {
 540         struct ide_cmd cmd;
 541
 542         memset(&cmd, 0, sizeof(cmd));
 543         if (ata_id_flush_ext_enabled(drive->id))
 544                 cmd.tf.command = ATA_CMD_FLUSH_EXT;
 545         else
 546                 cmd.tf.command = ATA_CMD_FLUSH;
 547         cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
 548         cmd.valid.in.tf  = IDE_VALID_IN_TF  | IDE_VALID_DEVICE;
 549
 550         return ide_no_data_taskfile(drive, &cmd);
 551 }
 552
 553 ide_devset_get(acoustic, acoustic);
 554
 555 static int set_acoustic(ide_drive_t *drive, int arg)
 556 {
 557         if (arg < 0 || arg > 254)
 558                 return -EINVAL;
 559
 560         ide_do_setfeature(drive,
 561                 arg ? SETFEATURES_AAM_ON : SETFEATURES_AAM_OFF, arg);
 562
 563         drive->acoustic = arg;
 564
 565         return 0;
 566 }
 567
 568 ide_devset_get_flag(addressing, IDE_DFLAG_LBA48);
 569
 570 /*
 571  * drive->addressing:
 572  *      0: 28-bit
 573  *      1: 48-bit
 574  *      2: 48-bit capable doing 28-bit
 575  */
 576 static int set_addressing(ide_drive_t *drive, int arg)
 577 {
 578         if (arg < 0 || arg > 2)
 579                 return -EINVAL;
 580
 581         if (arg && ((drive->hwif->host_flags & IDE_HFLAG_NO_LBA48) ||
 582             ata_id_lba48_enabled(drive->id) == 0))
 583                 return -EIO;
 584
 585         if (arg == 2)
 586                 arg = 0;
 587
 588         if (arg)
 589                 drive->dev_flags |= IDE_DFLAG_LBA48;
 590         else
 591                 drive->dev_flags &= ~IDE_DFLAG_LBA48;
 592
 593         return 0;
 594 }
 595
 596 ide_ext_devset_rw(acoustic, acoustic);
 597 ide_ext_devset_rw(address, addressing);
 598 ide_ext_devset_rw(multcount, multcount);
 599 ide_ext_devset_rw(wcache, wcache);
 600
 601 ide_ext_devset_rw_sync(nowerr, nowerr);
 602
 603 static int ide_disk_check(ide_drive_t *drive, const char *s)
 604 {
 605         return 1;
 606 }
 607
 608 static void ide_disk_setup(ide_drive_t *drive)
 609 {
 610         struct ide_disk_obj *idkp = drive->driver_data;
 611         struct request_queue *q = drive->queue;
 612         ide_hwif_t *hwif = drive->hwif;
 613         u16 *id = drive->id;
 614         char *m = (char *)&id[ATA_ID_PROD];
 615         unsigned long long capacity;
 616
 617         ide_proc_register_driver(drive, idkp->driver);
 618
 619         if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0)
 620                 return;
 621
 622         if (drive->dev_flags & IDE_DFLAG_REMOVABLE) {
 623                 /*
 624                  * Removable disks (eg. SYQUEST); ignore 'WD' drives
 625                  */
 626                 if (m[0] != 'W' || m[1] != 'D')
 627                         drive->dev_flags |= IDE_DFLAG_DOORLOCKING;
 628         }
 629
 630         (void)set_addressing(drive, 1);
 631
 632         if (drive->dev_flags & IDE_DFLAG_LBA48) {
 633                 int max_s = 2048;
 634
 635                 if (max_s > hwif->rqsize)
 636                         max_s = hwif->rqsize;
 637
 638                 blk_queue_max_sectors(q, max_s);
 639         }
 640
 641         printk(KERN_INFO "%s: max request size: %dKiB\n", drive->name,
 642                 q->max_sectors / 2);
 643
 644         if (ata_id_is_ssd(id))
 645                 queue_flag_set_unlocked(QUEUE_FLAG_NONROT, q);
 646
 647         /* calculate drive capacity, and select LBA if possible */
 648         ide_disk_get_capacity(drive);
 649
 650         /*
 651          * if possible, give fdisk access to more of the drive,
 652          * by correcting bios_cyls:
 653          */
 654         capacity = ide_gd_capacity(drive);
 655
 656         if ((drive->dev_flags & IDE_DFLAG_FORCED_GEOM) == 0) {
 657                 if (ata_id_lba48_enabled(drive->id)) {
 658                         /* compatibility */
 659                         drive->bios_sect = 63;
 660                         drive->bios_head = 255;
 661                 }
 662
 663                 if (drive->bios_sect && drive->bios_head) {
 664                         unsigned int cap0 = capacity; /* truncate to 32 bits */
 665                         unsigned int cylsz, cyl;
 666
 667                         if (cap0 != capacity)
 668                                 drive->bios_cyl = 65535;
 669                         else {
 670                                 cylsz = drive->bios_sect * drive->bios_head;
 671                                 cyl = cap0 / cylsz;
 672                                 if (cyl > 65535)
 673                                         cyl = 65535;
 674                                 if (cyl > drive->bios_cyl)
 675                                         drive->bios_cyl = cyl;
 676                         }
 677                 }
 678         }
 679         printk(KERN_INFO "%s: %llu sectors (%llu MB)",
 680                          drive->name, capacity, sectors_to_MB(capacity));
 681
 682         /* Only print cache size when it was specified */
 683         if (id[ATA_ID_BUF_SIZE])
 684                 printk(KERN_CONT " w/%dKiB Cache", id[ATA_ID_BUF_SIZE] / 2);
 685
 686         printk(KERN_CONT ", CHS=%d/%d/%d\n",
 687                          drive->bios_cyl, drive->bios_head, drive->bios_sect);
 688
 689         /* write cache enabled? */
 690         if ((id[ATA_ID_CSFO] & 1) || ata_id_wcache_enabled(id))
 691                 drive->dev_flags |= IDE_DFLAG_WCACHE;
 692
 693         set_wcache(drive, 1);
 694
 695         if ((drive->dev_flags & IDE_DFLAG_LBA) == 0 &&
 696             (drive->head == 0 || drive->head > 16)) {
 697                 printk(KERN_ERR "%s: invalid geometry: %d physical heads?\n",
 698                         drive->name, drive->head);
 699                 drive->dev_flags &= ~IDE_DFLAG_ATTACH;
 700         } else
 701                 drive->dev_flags |= IDE_DFLAG_ATTACH;
 702 }
 703
 704 static void ide_disk_flush(ide_drive_t *drive)
 705 {
 706         if (ata_id_flush_enabled(drive->id) == 0 ||
 707             (drive->dev_flags & IDE_DFLAG_WCACHE) == 0)
 708                 return;
 709
 710         if (do_idedisk_flushcache(drive))
 711                 printk(KERN_INFO "%s: wcache flush failed!\n", drive->name);
 712 }
 713
 714 static int ide_disk_init_media(ide_drive_t *drive, struct gendisk *disk)
 715 {
 716         return 0;
 717 }
 718
 719 static int ide_disk_set_doorlock(ide_drive_t *drive, struct gendisk *disk,
 720                                  int on)
 721 {
 722         struct ide_cmd cmd;
 723         int ret;
 724
 725         if ((drive->dev_flags & IDE_DFLAG_DOORLOCKING) == 0)
 726                 return 0;
 727
 728         memset(&cmd, 0, sizeof(cmd));
 729         cmd.tf.command = on ? ATA_CMD_MEDIA_LOCK : ATA_CMD_MEDIA_UNLOCK;
 730         cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
 731         cmd.valid.in.tf  = IDE_VALID_IN_TF  | IDE_VALID_DEVICE;
 732
 733         ret = ide_no_data_taskfile(drive, &cmd);
 734
 735         if (ret)
 736                 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
 737
 738         return ret;
 739 }
 740
 741 const struct ide_disk_ops ide_ata_disk_ops = {
 742         .check          = ide_disk_check,
 743         .get_capacity   = ide_disk_get_capacity,
 744         .setup          = ide_disk_setup,
 745         .flush          = ide_disk_flush,
 746         .init_media     = ide_disk_init_media,
 747         .set_doorlock   = ide_disk_set_doorlock,
 748         .do_request     = ide_do_rw_disk,
 749         .ioctl          = ide_disk_ioctl,
 750 };