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)blk_rq_sectors(rq);
  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 + blk_rq_sectors(rq) > 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         BUG_ON(!blk_fs_request(rq));
 188
 189         ledtrig_ide_activity();
 190
 191         pr_debug("%s: %sing: block=%llu, sectors=%u, buffer=0x%08lx\n",
 192                  drive->name, rq_data_dir(rq) == READ ? "read" : "writ",
 193                  (unsigned long long)block, blk_rq_sectors(rq),
 194                  (unsigned long)rq->buffer);
 195
 196         if (hwif->rw_disk)
 197                 hwif->rw_disk(drive, rq);
 198
 199         return __ide_do_rw_disk(drive, rq, block);
 200 }
 201
 202 /*
 203  * Queries for true maximum capacity of the drive.
 204  * Returns maximum LBA address (> 0) of the drive, 0 if failed.
 205  */
 206 static u64 idedisk_read_native_max_address(ide_drive_t *drive, int lba48)
 207 {
 208         struct ide_cmd cmd;
 209         struct ide_taskfile *tf = &cmd.tf;
 210         u64 addr = 0;
 211
 212         memset(&cmd, 0, sizeof(cmd));
 213         if (lba48)
 214                 tf->command = ATA_CMD_READ_NATIVE_MAX_EXT;
 215         else
 216                 tf->command = ATA_CMD_READ_NATIVE_MAX;
 217         tf->device  = ATA_LBA;
 218
 219         cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
 220         cmd.valid.in.tf  = IDE_VALID_IN_TF  | IDE_VALID_DEVICE;
 221         if (lba48) {
 222                 cmd.valid.out.hob = IDE_VALID_OUT_HOB;
 223                 cmd.valid.in.hob  = IDE_VALID_IN_HOB;
 224                 cmd.tf_flags = IDE_TFLAG_LBA48;
 225         }
 226
 227         ide_no_data_taskfile(drive, &cmd);
 228
 229         /* if OK, compute maximum address value */
 230         if (!(tf->status & ATA_ERR))
 231                 addr = ide_get_lba_addr(&cmd, lba48) + 1;
 232
 233         return addr;
 234 }
 235
 236 /*
 237  * Sets maximum virtual LBA address of the drive.
 238  * Returns new maximum virtual LBA address (> 0) or 0 on failure.
 239  */
 240 static u64 idedisk_set_max_address(ide_drive_t *drive, u64 addr_req, int lba48)
 241 {
 242         struct ide_cmd cmd;
 243         struct ide_taskfile *tf = &cmd.tf;
 244         u64 addr_set = 0;
 245
 246         addr_req--;
 247
 248         memset(&cmd, 0, sizeof(cmd));
 249         tf->lbal     = (addr_req >>  0) & 0xff;
 250         tf->lbam     = (addr_req >>= 8) & 0xff;
 251         tf->lbah     = (addr_req >>= 8) & 0xff;
 252         if (lba48) {
 253                 cmd.hob.lbal = (addr_req >>= 8) & 0xff;
 254                 cmd.hob.lbam = (addr_req >>= 8) & 0xff;
 255                 cmd.hob.lbah = (addr_req >>= 8) & 0xff;
 256                 tf->command  = ATA_CMD_SET_MAX_EXT;
 257         } else {
 258                 tf->device   = (addr_req >>= 8) & 0x0f;
 259                 tf->command  = ATA_CMD_SET_MAX;
 260         }
 261         tf->device |= ATA_LBA;
 262
 263         cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
 264         cmd.valid.in.tf  = IDE_VALID_IN_TF  | IDE_VALID_DEVICE;
 265         if (lba48) {
 266                 cmd.valid.out.hob = IDE_VALID_OUT_HOB;
 267                 cmd.valid.in.hob  = IDE_VALID_IN_HOB;
 268                 cmd.tf_flags = IDE_TFLAG_LBA48;
 269         }
 270
 271         ide_no_data_taskfile(drive, &cmd);
 272
 273         /* if OK, compute maximum address value */
 274         if (!(tf->status & ATA_ERR))
 275                 addr_set = ide_get_lba_addr(&cmd, lba48) + 1;
 276
 277         return addr_set;
 278 }
 279
 280 static unsigned long long sectors_to_MB(unsigned long long n)
 281 {
 282         n <<= 9;                /* make it bytes */
 283         do_div(n, 1000000);     /* make it MB */
 284         return n;
 285 }
 286
 287 /*
 288  * Some disks report total number of sectors instead of
 289  * maximum sector address.  We list them here.
 290  */
 291 static const struct drive_list_entry hpa_list[] = {
 292         { "ST340823A",  NULL },
 293         { "ST320413A",  NULL },
 294         { "ST310211A",  NULL },
 295         { NULL,         NULL }
 296 };
 297
 298 static u64 ide_disk_hpa_get_native_capacity(ide_drive_t *drive, int lba48)
 299 {
 300         u64 capacity, set_max;
 301
 302         capacity = drive->capacity64;
 303         set_max  = idedisk_read_native_max_address(drive, lba48);
 304
 305         if (ide_in_drive_list(drive->id, hpa_list)) {
 306                 /*
 307                  * Since we are inclusive wrt to firmware revisions do this
 308                  * extra check and apply the workaround only when needed.
 309                  */
 310                 if (set_max == capacity + 1)
 311                         set_max--;
 312         }
 313
 314         return set_max;
 315 }
 316
 317 static u64 ide_disk_hpa_set_capacity(ide_drive_t *drive, u64 set_max, int lba48)
 318 {
 319         set_max = idedisk_set_max_address(drive, set_max, lba48);
 320         if (set_max)
 321                 drive->capacity64 = set_max;
 322
 323         return set_max;
 324 }
 325
 326 static void idedisk_check_hpa(ide_drive_t *drive)
 327 {
 328         u64 capacity, set_max;
 329         int lba48 = ata_id_lba48_enabled(drive->id);
 330
 331         capacity = drive->capacity64;
 332         set_max  = ide_disk_hpa_get_native_capacity(drive, lba48);
 333
 334         if (set_max <= capacity)
 335                 return;
 336
 337         drive->probed_capacity = set_max;
 338
 339         printk(KERN_INFO "%s: Host Protected Area detected.\n"
 340                          "\tcurrent capacity is %llu sectors (%llu MB)\n"
 341                          "\tnative  capacity is %llu sectors (%llu MB)\n",
 342                          drive->name,
 343                          capacity, sectors_to_MB(capacity),
 344                          set_max, sectors_to_MB(set_max));
 345
 346         if ((drive->dev_flags & IDE_DFLAG_NOHPA) == 0)
 347                 return;
 348
 349         set_max = ide_disk_hpa_set_capacity(drive, set_max, lba48);
 350         if (set_max)
 351                 printk(KERN_INFO "%s: Host Protected Area disabled.\n",
 352                                  drive->name);
 353 }
 354
 355 static int ide_disk_get_capacity(ide_drive_t *drive)
 356 {
 357         u16 *id = drive->id;
 358         int lba;
 359
 360         if (ata_id_lba48_enabled(id)) {
 361                 /* drive speaks 48-bit LBA */
 362                 lba = 1;
 363                 drive->capacity64 = ata_id_u64(id, ATA_ID_LBA_CAPACITY_2);
 364         } else if (ata_id_has_lba(id) && ata_id_is_lba_capacity_ok(id)) {
 365                 /* drive speaks 28-bit LBA */
 366                 lba = 1;
 367                 drive->capacity64 = ata_id_u32(id, ATA_ID_LBA_CAPACITY);
 368         } else {
 369                 /* drive speaks boring old 28-bit CHS */
 370                 lba = 0;
 371                 drive->capacity64 = drive->cyl * drive->head * drive->sect;
 372         }
 373
 374         drive->probed_capacity = drive->capacity64;
 375
 376         if (lba) {
 377                 drive->dev_flags |= IDE_DFLAG_LBA;
 378
 379                 /*
 380                 * If this device supports the Host Protected Area feature set,
 381                 * then we may need to change our opinion about its capacity.
 382                 */
 383                 if (ata_id_hpa_enabled(id))
 384                         idedisk_check_hpa(drive);
 385         }
 386
 387         /* limit drive capacity to 137GB if LBA48 cannot be used */
 388         if ((drive->dev_flags & IDE_DFLAG_LBA48) == 0 &&
 389             drive->capacity64 > 1ULL << 28) {
 390                 printk(KERN_WARNING "%s: cannot use LBA48 - full capacity "
 391                        "%llu sectors (%llu MB)\n",
 392                        drive->name, (unsigned long long)drive->capacity64,
 393                        sectors_to_MB(drive->capacity64));
 394                 drive->probed_capacity = drive->capacity64 = 1ULL << 28;
 395         }
 396
 397         if ((drive->hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA) &&
 398             (drive->dev_flags & IDE_DFLAG_LBA48)) {
 399                 if (drive->capacity64 > 1ULL << 28) {
 400                         printk(KERN_INFO "%s: cannot use LBA48 DMA - PIO mode"
 401                                          " will be used for accessing sectors "
 402                                          "> %u\n", drive->name, 1 << 28);
 403                 } else
 404                         drive->dev_flags &= ~IDE_DFLAG_LBA48;
 405         }
 406
 407         return 0;
 408 }
 409
 410 static void ide_disk_unlock_native_capacity(ide_drive_t *drive)
 411 {
 412         u16 *id = drive->id;
 413         int lba48 = ata_id_lba48_enabled(id);
 414
 415         if ((drive->dev_flags & IDE_DFLAG_LBA) == 0 ||
 416             ata_id_hpa_enabled(id) == 0)
 417                 return;
 418
 419         /*
 420          * according to the spec the SET MAX ADDRESS command shall be
 421          * immediately preceded by a READ NATIVE MAX ADDRESS command
 422          */
 423         if (!ide_disk_hpa_get_native_capacity(drive, lba48))
 424                 return;
 425
 426         if (ide_disk_hpa_set_capacity(drive, drive->probed_capacity, lba48))
 427                 drive->dev_flags |= IDE_DFLAG_NOHPA; /* disable HPA on resume */
 428 }
 429
 430 static void idedisk_prepare_flush(struct request_queue *q, struct request *rq)
 431 {
 432         ide_drive_t *drive = q->queuedata;
 433         struct ide_cmd *cmd = kmalloc(sizeof(*cmd), GFP_ATOMIC);
 434
 435         /* FIXME: map struct ide_taskfile on rq->cmd[] */
 436         BUG_ON(cmd == NULL);
 437
 438         memset(cmd, 0, sizeof(*cmd));
 439         if (ata_id_flush_ext_enabled(drive->id) &&
 440             (drive->capacity64 >= (1UL << 28)))
 441                 cmd->tf.command = ATA_CMD_FLUSH_EXT;
 442         else
 443                 cmd->tf.command = ATA_CMD_FLUSH;
 444         cmd->valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
 445         cmd->tf_flags = IDE_TFLAG_DYN;
 446         cmd->protocol = ATA_PROT_NODATA;
 447
 448         rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
 449         rq->special = cmd;
 450         cmd->rq = rq;
 451 }
 452
 453 ide_devset_get(multcount, mult_count);
 454
 455 /*
 456  * This is tightly woven into the driver->do_special can not touch.
 457  * DON'T do it again until a total personality rewrite is committed.
 458  */
 459 static int set_multcount(ide_drive_t *drive, int arg)
 460 {
 461         struct request *rq;
 462         int error;
 463
 464         if (arg < 0 || arg > (drive->id[ATA_ID_MAX_MULTSECT] & 0xff))
 465                 return -EINVAL;
 466
 467         if (drive->special_flags & IDE_SFLAG_SET_MULTMODE)
 468                 return -EBUSY;
 469
 470         rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
 471         rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
 472
 473         drive->mult_req = arg;
 474         drive->special_flags |= IDE_SFLAG_SET_MULTMODE;
 475         error = blk_execute_rq(drive->queue, NULL, rq, 0);
 476         blk_put_request(rq);
 477
 478         return (drive->mult_count == arg) ? 0 : -EIO;
 479 }
 480
 481 ide_devset_get_flag(nowerr, IDE_DFLAG_NOWERR);
 482
 483 static int set_nowerr(ide_drive_t *drive, int arg)
 484 {
 485         if (arg < 0 || arg > 1)
 486                 return -EINVAL;
 487
 488         if (arg)
 489                 drive->dev_flags |= IDE_DFLAG_NOWERR;
 490         else
 491                 drive->dev_flags &= ~IDE_DFLAG_NOWERR;
 492
 493         drive->bad_wstat = arg ? BAD_R_STAT : BAD_W_STAT;
 494
 495         return 0;
 496 }
 497
 498 static int ide_do_setfeature(ide_drive_t *drive, u8 feature, u8 nsect)
 499 {
 500         struct ide_cmd cmd;
 501
 502         memset(&cmd, 0, sizeof(cmd));
 503         cmd.tf.feature = feature;
 504         cmd.tf.nsect   = nsect;
 505         cmd.tf.command = ATA_CMD_SET_FEATURES;
 506         cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
 507         cmd.valid.in.tf  = IDE_VALID_IN_TF  | IDE_VALID_DEVICE;
 508
 509         return ide_no_data_taskfile(drive, &cmd);
 510 }
 511
 512 static void update_ordered(ide_drive_t *drive)
 513 {
 514         u16 *id = drive->id;
 515         unsigned ordered = QUEUE_ORDERED_NONE;
 516         prepare_flush_fn *prep_fn = NULL;
 517
 518         if (drive->dev_flags & IDE_DFLAG_WCACHE) {
 519                 unsigned long long capacity;
 520                 int barrier;
 521                 /*
 522                  * We must avoid issuing commands a drive does not
 523                  * understand or we may crash it. We check flush cache
 524                  * is supported. We also check we have the LBA48 flush
 525                  * cache if the drive capacity is too large. By this
 526                  * time we have trimmed the drive capacity if LBA48 is
 527                  * not available so we don't need to recheck that.
 528                  */
 529                 capacity = ide_gd_capacity(drive);
 530                 barrier = ata_id_flush_enabled(id) &&
 531                         (drive->dev_flags & IDE_DFLAG_NOFLUSH) == 0 &&
 532                         ((drive->dev_flags & IDE_DFLAG_LBA48) == 0 ||
 533                          capacity <= (1ULL << 28) ||
 534                          ata_id_flush_ext_enabled(id));
 535
 536                 printk(KERN_INFO "%s: cache flushes %ssupported\n",
 537                        drive->name, barrier ? "" : "not ");
 538
 539                 if (barrier) {
 540                         ordered = QUEUE_ORDERED_DRAIN_FLUSH;
 541                         prep_fn = idedisk_prepare_flush;
 542                 }
 543         } else
 544                 ordered = QUEUE_ORDERED_DRAIN;
 545
 546         blk_queue_ordered(drive->queue, ordered, prep_fn);
 547 }
 548
 549 ide_devset_get_flag(wcache, IDE_DFLAG_WCACHE);
 550
 551 static int set_wcache(ide_drive_t *drive, int arg)
 552 {
 553         int err = 1;
 554
 555         if (arg < 0 || arg > 1)
 556                 return -EINVAL;
 557
 558         if (ata_id_flush_enabled(drive->id)) {
 559                 err = ide_do_setfeature(drive,
 560                         arg ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF, 0);
 561                 if (err == 0) {
 562                         if (arg)
 563                                 drive->dev_flags |= IDE_DFLAG_WCACHE;
 564                         else
 565                                 drive->dev_flags &= ~IDE_DFLAG_WCACHE;
 566                 }
 567         }
 568
 569         update_ordered(drive);
 570
 571         return err;
 572 }
 573
 574 static int do_idedisk_flushcache(ide_drive_t *drive)
 575 {
 576         struct ide_cmd cmd;
 577
 578         memset(&cmd, 0, sizeof(cmd));
 579         if (ata_id_flush_ext_enabled(drive->id))
 580                 cmd.tf.command = ATA_CMD_FLUSH_EXT;
 581         else
 582                 cmd.tf.command = ATA_CMD_FLUSH;
 583         cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
 584         cmd.valid.in.tf  = IDE_VALID_IN_TF  | IDE_VALID_DEVICE;
 585
 586         return ide_no_data_taskfile(drive, &cmd);
 587 }
 588
 589 ide_devset_get(acoustic, acoustic);
 590
 591 static int set_acoustic(ide_drive_t *drive, int arg)
 592 {
 593         if (arg < 0 || arg > 254)
 594                 return -EINVAL;
 595
 596         ide_do_setfeature(drive,
 597                 arg ? SETFEATURES_AAM_ON : SETFEATURES_AAM_OFF, arg);
 598
 599         drive->acoustic = arg;
 600
 601         return 0;
 602 }
 603
 604 ide_devset_get_flag(addressing, IDE_DFLAG_LBA48);
 605
 606 /*
 607  * drive->addressing:
 608  *      0: 28-bit
 609  *      1: 48-bit
 610  *      2: 48-bit capable doing 28-bit
 611  */
 612 static int set_addressing(ide_drive_t *drive, int arg)
 613 {
 614         if (arg < 0 || arg > 2)
 615                 return -EINVAL;
 616
 617         if (arg && ((drive->hwif->host_flags & IDE_HFLAG_NO_LBA48) ||
 618             ata_id_lba48_enabled(drive->id) == 0))
 619                 return -EIO;
 620
 621         if (arg == 2)
 622                 arg = 0;
 623
 624         if (arg)
 625                 drive->dev_flags |= IDE_DFLAG_LBA48;
 626         else
 627                 drive->dev_flags &= ~IDE_DFLAG_LBA48;
 628
 629         return 0;
 630 }
 631
 632 ide_ext_devset_rw(acoustic, acoustic);
 633 ide_ext_devset_rw(address, addressing);
 634 ide_ext_devset_rw(multcount, multcount);
 635 ide_ext_devset_rw(wcache, wcache);
 636
 637 ide_ext_devset_rw_sync(nowerr, nowerr);
 638
 639 static int ide_disk_check(ide_drive_t *drive, const char *s)
 640 {
 641         return 1;
 642 }
 643
 644 static void ide_disk_setup(ide_drive_t *drive)
 645 {
 646         struct ide_disk_obj *idkp = drive->driver_data;
 647         struct request_queue *q = drive->queue;
 648         ide_hwif_t *hwif = drive->hwif;
 649         u16 *id = drive->id;
 650         char *m = (char *)&id[ATA_ID_PROD];
 651         unsigned long long capacity;
 652
 653         ide_proc_register_driver(drive, idkp->driver);
 654
 655         if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0)
 656                 return;
 657
 658         if (drive->dev_flags & IDE_DFLAG_REMOVABLE) {
 659                 /*
 660                  * Removable disks (eg. SYQUEST); ignore 'WD' drives
 661                  */
 662                 if (m[0] != 'W' || m[1] != 'D')
 663                         drive->dev_flags |= IDE_DFLAG_DOORLOCKING;
 664         }
 665
 666         (void)set_addressing(drive, 1);
 667
 668         if (drive->dev_flags & IDE_DFLAG_LBA48) {
 669                 int max_s = 2048;
 670
 671                 if (max_s > hwif->rqsize)
 672                         max_s = hwif->rqsize;
 673
 674                 blk_queue_max_hw_sectors(q, max_s);
 675         }
 676
 677         printk(KERN_INFO "%s: max request size: %dKiB\n", drive->name,
 678                queue_max_sectors(q) / 2);
 679
 680         if (ata_id_is_ssd(id))
 681                 queue_flag_set_unlocked(QUEUE_FLAG_NONROT, q);
 682
 683         /* calculate drive capacity, and select LBA if possible */
 684         ide_disk_get_capacity(drive);
 685
 686         /*
 687          * if possible, give fdisk access to more of the drive,
 688          * by correcting bios_cyls:
 689          */
 690         capacity = ide_gd_capacity(drive);
 691
 692         if ((drive->dev_flags & IDE_DFLAG_FORCED_GEOM) == 0) {
 693                 if (ata_id_lba48_enabled(drive->id)) {
 694                         /* compatibility */
 695                         drive->bios_sect = 63;
 696                         drive->bios_head = 255;
 697                 }
 698
 699                 if (drive->bios_sect && drive->bios_head) {
 700                         unsigned int cap0 = capacity; /* truncate to 32 bits */
 701                         unsigned int cylsz, cyl;
 702
 703                         if (cap0 != capacity)
 704                                 drive->bios_cyl = 65535;
 705                         else {
 706                                 cylsz = drive->bios_sect * drive->bios_head;
 707                                 cyl = cap0 / cylsz;
 708                                 if (cyl > 65535)
 709                                         cyl = 65535;
 710                                 if (cyl > drive->bios_cyl)
 711                                         drive->bios_cyl = cyl;
 712                         }
 713                 }
 714         }
 715         printk(KERN_INFO "%s: %llu sectors (%llu MB)",
 716                          drive->name, capacity, sectors_to_MB(capacity));
 717
 718         /* Only print cache size when it was specified */
 719         if (id[ATA_ID_BUF_SIZE])
 720                 printk(KERN_CONT " w/%dKiB Cache", id[ATA_ID_BUF_SIZE] / 2);
 721
 722         printk(KERN_CONT ", CHS=%d/%d/%d\n",
 723                          drive->bios_cyl, drive->bios_head, drive->bios_sect);
 724
 725         /* write cache enabled? */
 726         if ((id[ATA_ID_CSFO] & 1) || ata_id_wcache_enabled(id))
 727                 drive->dev_flags |= IDE_DFLAG_WCACHE;
 728
 729         set_wcache(drive, 1);
 730
 731         if ((drive->dev_flags & IDE_DFLAG_LBA) == 0 &&
 732             (drive->head == 0 || drive->head > 16)) {
 733                 printk(KERN_ERR "%s: invalid geometry: %d physical heads?\n",
 734                         drive->name, drive->head);
 735                 drive->dev_flags &= ~IDE_DFLAG_ATTACH;
 736         } else
 737                 drive->dev_flags |= IDE_DFLAG_ATTACH;
 738 }
 739
 740 static void ide_disk_flush(ide_drive_t *drive)
 741 {
 742         if (ata_id_flush_enabled(drive->id) == 0 ||
 743             (drive->dev_flags & IDE_DFLAG_WCACHE) == 0)
 744                 return;
 745
 746         if (do_idedisk_flushcache(drive))
 747                 printk(KERN_INFO "%s: wcache flush failed!\n", drive->name);
 748 }
 749
 750 static int ide_disk_init_media(ide_drive_t *drive, struct gendisk *disk)
 751 {
 752         return 0;
 753 }
 754
 755 static int ide_disk_set_doorlock(ide_drive_t *drive, struct gendisk *disk,
 756                                  int on)
 757 {
 758         struct ide_cmd cmd;
 759         int ret;
 760
 761         if ((drive->dev_flags & IDE_DFLAG_DOORLOCKING) == 0)
 762                 return 0;
 763
 764         memset(&cmd, 0, sizeof(cmd));
 765         cmd.tf.command = on ? ATA_CMD_MEDIA_LOCK : ATA_CMD_MEDIA_UNLOCK;
 766         cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
 767         cmd.valid.in.tf  = IDE_VALID_IN_TF  | IDE_VALID_DEVICE;
 768
 769         ret = ide_no_data_taskfile(drive, &cmd);
 770
 771         if (ret)
 772                 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
 773
 774         return ret;
 775 }
 776
 777 const struct ide_disk_ops ide_ata_disk_ops = {
 778         .check                  = ide_disk_check,
 779         .unlock_native_capacity = ide_disk_unlock_native_capacity,
 780         .get_capacity           = ide_disk_get_capacity,
 781         .setup                  = ide_disk_setup,
 782         .flush                  = ide_disk_flush,
 783         .init_media             = ide_disk_init_media,
 784         .set_doorlock           = ide_disk_set_doorlock,
 785         .do_request             = ide_do_rw_disk,
 786         .ioctl                  = ide_disk_ioctl,
 787 };