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, ide_task_t *task, u8 dma)
  66 {
  67         u8 index, lba48, write;
  68
  69         lba48 = (task->tf_flags & IDE_TFLAG_LBA48) ? 2 : 0;
  70         write = (task->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         task->tf.command = ide_rw_cmds[index + lba48 + write];
  78
  79         if (dma)
  80                 index = 8; /* fixup index */
  81
  82         task->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         ide_task_t              task;
  97         struct ide_taskfile     *tf = &task.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         if (!dma) {
 108                 ide_init_sg_cmd(drive, rq);
 109                 ide_map_sg(drive, rq);
 110         }
 111
 112         memset(&task, 0, sizeof(task));
 113         task.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
 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                         task.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         if (rq_data_dir(rq))
 160                 task.tf_flags |= IDE_TFLAG_WRITE;
 161
 162         ide_tf_set_cmd(drive, &task, dma);
 163         task.rq = rq;
 164
 165         rc = do_rw_taskfile(drive, &task);
 166
 167         if (rc == ide_stopped && dma) {
 168                 /* fallback to PIO */
 169                 task.tf_flags |= IDE_TFLAG_DMA_PIO_FALLBACK;
 170                 ide_tf_set_cmd(drive, &task, 0);
 171                 ide_init_sg_cmd(drive, rq);
 172                 rc = do_rw_taskfile(drive, &task);
 173         }
 174
 175         return rc;
 176 }
 177
 178 /*
 179  * 268435455  == 137439 MB or 28bit limit
 180  * 320173056  == 163929 MB or 48bit addressing
 181  * 1073741822 == 549756 MB or 48bit addressing fake drive
 182  */
 183
 184 static ide_startstop_t ide_do_rw_disk(ide_drive_t *drive, struct request *rq,
 185                                       sector_t block)
 186 {
 187         ide_hwif_t *hwif = drive->hwif;
 188
 189         BUG_ON(drive->dev_flags & IDE_DFLAG_BLOCKED);
 190
 191         if (!blk_fs_request(rq)) {
 192                 blk_dump_rq_flags(rq, "ide_do_rw_disk - bad command");
 193                 ide_end_request(drive, 0, 0);
 194                 return ide_stopped;
 195         }
 196
 197         ledtrig_ide_activity();
 198
 199         pr_debug("%s: %sing: block=%llu, sectors=%lu, buffer=0x%08lx\n",
 200                  drive->name, rq_data_dir(rq) == READ ? "read" : "writ",
 201                  (unsigned long long)block, rq->nr_sectors,
 202                  (unsigned long)rq->buffer);
 203
 204         if (hwif->rw_disk)
 205                 hwif->rw_disk(drive, rq);
 206
 207         return __ide_do_rw_disk(drive, rq, block);
 208 }
 209
 210 /*
 211  * Queries for true maximum capacity of the drive.
 212  * Returns maximum LBA address (> 0) of the drive, 0 if failed.
 213  */
 214 static u64 idedisk_read_native_max_address(ide_drive_t *drive, int lba48)
 215 {
 216         ide_task_t args;
 217         struct ide_taskfile *tf = &args.tf;
 218         u64 addr = 0;
 219
 220         /* Create IDE/ATA command request structure */
 221         memset(&args, 0, sizeof(ide_task_t));
 222         if (lba48)
 223                 tf->command = ATA_CMD_READ_NATIVE_MAX_EXT;
 224         else
 225                 tf->command = ATA_CMD_READ_NATIVE_MAX;
 226         tf->device  = ATA_LBA;
 227         args.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
 228         if (lba48)
 229                 args.tf_flags |= (IDE_TFLAG_LBA48 | IDE_TFLAG_HOB);
 230         /* submit command request */
 231         ide_no_data_taskfile(drive, &args);
 232
 233         /* if OK, compute maximum address value */
 234         if ((tf->status & 0x01) == 0)
 235                 addr = ide_get_lba_addr(tf, lba48) + 1;
 236
 237         return addr;
 238 }
 239
 240 /*
 241  * Sets maximum virtual LBA address of the drive.
 242  * Returns new maximum virtual LBA address (> 0) or 0 on failure.
 243  */
 244 static u64 idedisk_set_max_address(ide_drive_t *drive, u64 addr_req, int lba48)
 245 {
 246         ide_task_t args;
 247         struct ide_taskfile *tf = &args.tf;
 248         u64 addr_set = 0;
 249
 250         addr_req--;
 251         /* Create IDE/ATA command request structure */
 252         memset(&args, 0, sizeof(ide_task_t));
 253         tf->lbal     = (addr_req >>  0) & 0xff;
 254         tf->lbam     = (addr_req >>= 8) & 0xff;
 255         tf->lbah     = (addr_req >>= 8) & 0xff;
 256         if (lba48) {
 257                 tf->hob_lbal = (addr_req >>= 8) & 0xff;
 258                 tf->hob_lbam = (addr_req >>= 8) & 0xff;
 259                 tf->hob_lbah = (addr_req >>= 8) & 0xff;
 260                 tf->command  = ATA_CMD_SET_MAX_EXT;
 261         } else {
 262                 tf->device   = (addr_req >>= 8) & 0x0f;
 263                 tf->command  = ATA_CMD_SET_MAX;
 264         }
 265         tf->device |= ATA_LBA;
 266         args.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
 267         if (lba48)
 268                 args.tf_flags |= (IDE_TFLAG_LBA48 | IDE_TFLAG_HOB);
 269         /* submit command request */
 270         ide_no_data_taskfile(drive, &args);
 271         /* if OK, compute maximum address value */
 272         if ((tf->status & 0x01) == 0)
 273                 addr_set = ide_get_lba_addr(tf, lba48) + 1;
 274
 275         return addr_set;
 276 }
 277
 278 static unsigned long long sectors_to_MB(unsigned long long n)
 279 {
 280         n <<= 9;                /* make it bytes */
 281         do_div(n, 1000000);     /* make it MB */
 282         return n;
 283 }
 284
 285 /*
 286  * Some disks report total number of sectors instead of
 287  * maximum sector address.  We list them here.
 288  */
 289 static const struct drive_list_entry hpa_list[] = {
 290         { "ST340823A",  NULL },
 291         { "ST320413A",  NULL },
 292         { "ST310211A",  NULL },
 293         { NULL,         NULL }
 294 };
 295
 296 static void idedisk_check_hpa(ide_drive_t *drive)
 297 {
 298         unsigned long long capacity, set_max;
 299         int lba48 = ata_id_lba48_enabled(drive->id);
 300
 301         capacity = drive->capacity64;
 302
 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         if (set_max <= capacity)
 315                 return;
 316
 317         printk(KERN_INFO "%s: Host Protected Area detected.\n"
 318                          "\tcurrent capacity is %llu sectors (%llu MB)\n"
 319                          "\tnative  capacity is %llu sectors (%llu MB)\n",
 320                          drive->name,
 321                          capacity, sectors_to_MB(capacity),
 322                          set_max, sectors_to_MB(set_max));
 323
 324         set_max = idedisk_set_max_address(drive, set_max, lba48);
 325
 326         if (set_max) {
 327                 drive->capacity64 = set_max;
 328                 printk(KERN_INFO "%s: Host Protected Area disabled.\n",
 329                                  drive->name);
 330         }
 331 }
 332
 333 static int ide_disk_get_capacity(ide_drive_t *drive)
 334 {
 335         u16 *id = drive->id;
 336         int lba;
 337
 338         if (ata_id_lba48_enabled(id)) {
 339                 /* drive speaks 48-bit LBA */
 340                 lba = 1;
 341                 drive->capacity64 = ata_id_u64(id, ATA_ID_LBA_CAPACITY_2);
 342         } else if (ata_id_has_lba(id) && ata_id_is_lba_capacity_ok(id)) {
 343                 /* drive speaks 28-bit LBA */
 344                 lba = 1;
 345                 drive->capacity64 = ata_id_u32(id, ATA_ID_LBA_CAPACITY);
 346         } else {
 347                 /* drive speaks boring old 28-bit CHS */
 348                 lba = 0;
 349                 drive->capacity64 = drive->cyl * drive->head * drive->sect;
 350         }
 351
 352         if (lba) {
 353                 drive->dev_flags |= IDE_DFLAG_LBA;
 354
 355                 /*
 356                 * If this device supports the Host Protected Area feature set,
 357                 * then we may need to change our opinion about its capacity.
 358                 */
 359                 if (ata_id_hpa_enabled(id))
 360                         idedisk_check_hpa(drive);
 361         }
 362
 363         /* limit drive capacity to 137GB if LBA48 cannot be used */
 364         if ((drive->dev_flags & IDE_DFLAG_LBA48) == 0 &&
 365             drive->capacity64 > 1ULL << 28) {
 366                 printk(KERN_WARNING "%s: cannot use LBA48 - full capacity "
 367                        "%llu sectors (%llu MB)\n",
 368                        drive->name, (unsigned long long)drive->capacity64,
 369                        sectors_to_MB(drive->capacity64));
 370                 drive->capacity64 = 1ULL << 28;
 371         }
 372
 373         if ((drive->hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA) &&
 374             (drive->dev_flags & IDE_DFLAG_LBA48)) {
 375                 if (drive->capacity64 > 1ULL << 28) {
 376                         printk(KERN_INFO "%s: cannot use LBA48 DMA - PIO mode"
 377                                          " will be used for accessing sectors "
 378                                          "> %u\n", drive->name, 1 << 28);
 379                 } else
 380                         drive->dev_flags &= ~IDE_DFLAG_LBA48;
 381         }
 382
 383         return 0;
 384 }
 385
 386 static void idedisk_prepare_flush(struct request_queue *q, struct request *rq)
 387 {
 388         ide_drive_t *drive = q->queuedata;
 389         ide_task_t *task = kmalloc(sizeof(*task), GFP_ATOMIC);
 390
 391         /* FIXME: map struct ide_taskfile on rq->cmd[] */
 392         BUG_ON(task == NULL);
 393
 394         memset(task, 0, sizeof(*task));
 395         if (ata_id_flush_ext_enabled(drive->id) &&
 396             (drive->capacity64 >= (1UL << 28)))
 397                 task->tf.command = ATA_CMD_FLUSH_EXT;
 398         else
 399                 task->tf.command = ATA_CMD_FLUSH;
 400         task->tf_flags   = IDE_TFLAG_OUT_TF | IDE_TFLAG_OUT_DEVICE |
 401                            IDE_TFLAG_DYN;
 402         task->data_phase = TASKFILE_NO_DATA;
 403
 404         rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
 405         rq->cmd_flags |= REQ_SOFTBARRIER;
 406         rq->special = task;
 407 }
 408
 409 ide_devset_get(multcount, mult_count);
 410
 411 /*
 412  * This is tightly woven into the driver->do_special can not touch.
 413  * DON'T do it again until a total personality rewrite is committed.
 414  */
 415 static int set_multcount(ide_drive_t *drive, int arg)
 416 {
 417         struct request *rq;
 418         int error;
 419
 420         if (arg < 0 || arg > (drive->id[ATA_ID_MAX_MULTSECT] & 0xff))
 421                 return -EINVAL;
 422
 423         if (drive->special.b.set_multmode)
 424                 return -EBUSY;
 425
 426         rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
 427         rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
 428
 429         drive->mult_req = arg;
 430         drive->special.b.set_multmode = 1;
 431         error = blk_execute_rq(drive->queue, NULL, rq, 0);
 432         blk_put_request(rq);
 433
 434         return (drive->mult_count == arg) ? 0 : -EIO;
 435 }
 436
 437 ide_devset_get_flag(nowerr, IDE_DFLAG_NOWERR);
 438
 439 static int set_nowerr(ide_drive_t *drive, int arg)
 440 {
 441         if (arg < 0 || arg > 1)
 442                 return -EINVAL;
 443
 444         if (arg)
 445                 drive->dev_flags |= IDE_DFLAG_NOWERR;
 446         else
 447                 drive->dev_flags &= ~IDE_DFLAG_NOWERR;
 448
 449         drive->bad_wstat = arg ? BAD_R_STAT : BAD_W_STAT;
 450
 451         return 0;
 452 }
 453
 454 static int ide_do_setfeature(ide_drive_t *drive, u8 feature, u8 nsect)
 455 {
 456         ide_task_t task;
 457
 458         memset(&task, 0, sizeof(task));
 459         task.tf.feature = feature;
 460         task.tf.nsect   = nsect;
 461         task.tf.command = ATA_CMD_SET_FEATURES;
 462         task.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
 463
 464         return ide_no_data_taskfile(drive, &task);
 465 }
 466
 467 static void update_ordered(ide_drive_t *drive)
 468 {
 469         u16 *id = drive->id;
 470         unsigned ordered = QUEUE_ORDERED_NONE;
 471         prepare_flush_fn *prep_fn = NULL;
 472
 473         if (drive->dev_flags & IDE_DFLAG_WCACHE) {
 474                 unsigned long long capacity;
 475                 int barrier;
 476                 /*
 477                  * We must avoid issuing commands a drive does not
 478                  * understand or we may crash it. We check flush cache
 479                  * is supported. We also check we have the LBA48 flush
 480                  * cache if the drive capacity is too large. By this
 481                  * time we have trimmed the drive capacity if LBA48 is
 482                  * not available so we don't need to recheck that.
 483                  */
 484                 capacity = ide_gd_capacity(drive);
 485                 barrier = ata_id_flush_enabled(id) &&
 486                         (drive->dev_flags & IDE_DFLAG_NOFLUSH) == 0 &&
 487                         ((drive->dev_flags & IDE_DFLAG_LBA48) == 0 ||
 488                          capacity <= (1ULL << 28) ||
 489                          ata_id_flush_ext_enabled(id));
 490
 491                 printk(KERN_INFO "%s: cache flushes %ssupported\n",
 492                        drive->name, barrier ? "" : "not ");
 493
 494                 if (barrier) {
 495                         ordered = QUEUE_ORDERED_DRAIN_FLUSH;
 496                         prep_fn = idedisk_prepare_flush;
 497                 }
 498         } else
 499                 ordered = QUEUE_ORDERED_DRAIN;
 500
 501         blk_queue_ordered(drive->queue, ordered, prep_fn);
 502 }
 503
 504 ide_devset_get_flag(wcache, IDE_DFLAG_WCACHE);
 505
 506 static int set_wcache(ide_drive_t *drive, int arg)
 507 {
 508         int err = 1;
 509
 510         if (arg < 0 || arg > 1)
 511                 return -EINVAL;
 512
 513         if (ata_id_flush_enabled(drive->id)) {
 514                 err = ide_do_setfeature(drive,
 515                         arg ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF, 0);
 516                 if (err == 0) {
 517                         if (arg)
 518                                 drive->dev_flags |= IDE_DFLAG_WCACHE;
 519                         else
 520                                 drive->dev_flags &= ~IDE_DFLAG_WCACHE;
 521                 }
 522         }
 523
 524         update_ordered(drive);
 525
 526         return err;
 527 }
 528
 529 static int do_idedisk_flushcache(ide_drive_t *drive)
 530 {
 531         ide_task_t args;
 532
 533         memset(&args, 0, sizeof(ide_task_t));
 534         if (ata_id_flush_ext_enabled(drive->id))
 535                 args.tf.command = ATA_CMD_FLUSH_EXT;
 536         else
 537                 args.tf.command = ATA_CMD_FLUSH;
 538         args.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
 539         return ide_no_data_taskfile(drive, &args);
 540 }
 541
 542 ide_devset_get(acoustic, acoustic);
 543
 544 static int set_acoustic(ide_drive_t *drive, int arg)
 545 {
 546         if (arg < 0 || arg > 254)
 547                 return -EINVAL;
 548
 549         ide_do_setfeature(drive,
 550                 arg ? SETFEATURES_AAM_ON : SETFEATURES_AAM_OFF, arg);
 551
 552         drive->acoustic = arg;
 553
 554         return 0;
 555 }
 556
 557 ide_devset_get_flag(addressing, IDE_DFLAG_LBA48);
 558
 559 /*
 560  * drive->addressing:
 561  *      0: 28-bit
 562  *      1: 48-bit
 563  *      2: 48-bit capable doing 28-bit
 564  */
 565 static int set_addressing(ide_drive_t *drive, int arg)
 566 {
 567         if (arg < 0 || arg > 2)
 568                 return -EINVAL;
 569
 570         if (arg && ((drive->hwif->host_flags & IDE_HFLAG_NO_LBA48) ||
 571             ata_id_lba48_enabled(drive->id) == 0))
 572                 return -EIO;
 573
 574         if (arg == 2)
 575                 arg = 0;
 576
 577         if (arg)
 578                 drive->dev_flags |= IDE_DFLAG_LBA48;
 579         else
 580                 drive->dev_flags &= ~IDE_DFLAG_LBA48;
 581
 582         return 0;
 583 }
 584
 585 ide_ext_devset_rw(acoustic, acoustic);
 586 ide_ext_devset_rw(address, addressing);
 587 ide_ext_devset_rw(multcount, multcount);
 588 ide_ext_devset_rw(wcache, wcache);
 589
 590 ide_ext_devset_rw_sync(nowerr, nowerr);
 591
 592 static int ide_disk_check(ide_drive_t *drive, const char *s)
 593 {
 594         return 1;
 595 }
 596
 597 static void ide_disk_setup(ide_drive_t *drive)
 598 {
 599         struct ide_disk_obj *idkp = drive->driver_data;
 600         struct request_queue *q = drive->queue;
 601         ide_hwif_t *hwif = drive->hwif;
 602         u16 *id = drive->id;
 603         char *m = (char *)&id[ATA_ID_PROD];
 604         unsigned long long capacity;
 605
 606         ide_proc_register_driver(drive, idkp->driver);
 607
 608         if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0)
 609                 return;
 610
 611         if (drive->dev_flags & IDE_DFLAG_REMOVABLE) {
 612                 /*
 613                  * Removable disks (eg. SYQUEST); ignore 'WD' drives
 614                  */
 615                 if (m[0] != 'W' || m[1] != 'D')
 616                         drive->dev_flags |= IDE_DFLAG_DOORLOCKING;
 617         }
 618
 619         (void)set_addressing(drive, 1);
 620
 621         if (drive->dev_flags & IDE_DFLAG_LBA48) {
 622                 int max_s = 2048;
 623
 624                 if (max_s > hwif->rqsize)
 625                         max_s = hwif->rqsize;
 626
 627                 blk_queue_max_sectors(q, max_s);
 628         }
 629
 630         printk(KERN_INFO "%s: max request size: %dKiB\n", drive->name,
 631                 q->max_sectors / 2);
 632
 633         if (ata_id_is_ssd(id))
 634                 queue_flag_set_unlocked(QUEUE_FLAG_NONROT, q);
 635
 636         /* calculate drive capacity, and select LBA if possible */
 637         ide_disk_get_capacity(drive);
 638
 639         /*
 640          * if possible, give fdisk access to more of the drive,
 641          * by correcting bios_cyls:
 642          */
 643         capacity = ide_gd_capacity(drive);
 644
 645         if ((drive->dev_flags & IDE_DFLAG_FORCED_GEOM) == 0) {
 646                 if (ata_id_lba48_enabled(drive->id)) {
 647                         /* compatibility */
 648                         drive->bios_sect = 63;
 649                         drive->bios_head = 255;
 650                 }
 651
 652                 if (drive->bios_sect && drive->bios_head) {
 653                         unsigned int cap0 = capacity; /* truncate to 32 bits */
 654                         unsigned int cylsz, cyl;
 655
 656                         if (cap0 != capacity)
 657                                 drive->bios_cyl = 65535;
 658                         else {
 659                                 cylsz = drive->bios_sect * drive->bios_head;
 660                                 cyl = cap0 / cylsz;
 661                                 if (cyl > 65535)
 662                                         cyl = 65535;
 663                                 if (cyl > drive->bios_cyl)
 664                                         drive->bios_cyl = cyl;
 665                         }
 666                 }
 667         }
 668         printk(KERN_INFO "%s: %llu sectors (%llu MB)",
 669                          drive->name, capacity, sectors_to_MB(capacity));
 670
 671         /* Only print cache size when it was specified */
 672         if (id[ATA_ID_BUF_SIZE])
 673                 printk(KERN_CONT " w/%dKiB Cache", id[ATA_ID_BUF_SIZE] / 2);
 674
 675         printk(KERN_CONT ", CHS=%d/%d/%d\n",
 676                          drive->bios_cyl, drive->bios_head, drive->bios_sect);
 677
 678         /* write cache enabled? */
 679         if ((id[ATA_ID_CSFO] & 1) || ata_id_wcache_enabled(id))
 680                 drive->dev_flags |= IDE_DFLAG_WCACHE;
 681
 682         set_wcache(drive, 1);
 683
 684         if ((drive->dev_flags & IDE_DFLAG_LBA) == 0 &&
 685             (drive->head == 0 || drive->head > 16)) {
 686                 printk(KERN_ERR "%s: invalid geometry: %d physical heads?\n",
 687                         drive->name, drive->head);
 688                 drive->dev_flags &= ~IDE_DFLAG_ATTACH;
 689         } else
 690                 drive->dev_flags |= IDE_DFLAG_ATTACH;
 691 }
 692
 693 static void ide_disk_flush(ide_drive_t *drive)
 694 {
 695         if (ata_id_flush_enabled(drive->id) == 0 ||
 696             (drive->dev_flags & IDE_DFLAG_WCACHE) == 0)
 697                 return;
 698
 699         if (do_idedisk_flushcache(drive))
 700                 printk(KERN_INFO "%s: wcache flush failed!\n", drive->name);
 701 }
 702
 703 static int ide_disk_init_media(ide_drive_t *drive, struct gendisk *disk)
 704 {
 705         return 0;
 706 }
 707
 708 static int ide_disk_set_doorlock(ide_drive_t *drive, struct gendisk *disk,
 709                                  int on)
 710 {
 711         ide_task_t task;
 712         int ret;
 713
 714         if ((drive->dev_flags & IDE_DFLAG_DOORLOCKING) == 0)
 715                 return 0;
 716
 717         memset(&task, 0, sizeof(task));
 718         task.tf.command = on ? ATA_CMD_MEDIA_LOCK : ATA_CMD_MEDIA_UNLOCK;
 719         task.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
 720
 721         ret = ide_no_data_taskfile(drive, &task);
 722
 723         if (ret)
 724                 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
 725
 726         return ret;
 727 }
 728
 729 const struct ide_disk_ops ide_ata_disk_ops = {
 730         .check          = ide_disk_check,
 731         .get_capacity   = ide_disk_get_capacity,
 732         .setup          = ide_disk_setup,
 733         .flush          = ide_disk_flush,
 734         .init_media     = ide_disk_init_media,
 735         .set_doorlock   = ide_disk_set_doorlock,
 736         .do_request     = ide_do_rw_disk,
 737         .ioctl          = ide_disk_ioctl,
 738 };