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   1 /*
   2  *  linux/drivers/ide/ide-disk.c        Version 1.18    Mar 05, 2003
   3  *
   4  *  Copyright (C) 1994-1998  Linus Torvalds & authors (see below)
   5  *  Copyright (C) 1998-2002  Linux ATA Development
   6  *                              Andre Hedrick <andre@linux-ide.org>
   7  *  Copyright (C) 2003       Red Hat <alan@redhat.com>
   8  */
   9
  10 /*
  11  *  Mostly written by Mark Lord <mlord@pobox.com>
  12  *                and Gadi Oxman <gadio@netvision.net.il>
  13  *                and Andre Hedrick <andre@linux-ide.org>
  14  *
  15  * This is the IDE/ATA disk driver, as evolved from hd.c and ide.c.
  16  */
  17
  18 #define IDEDISK_VERSION "1.18"
  19
  20 //#define DEBUG
  21
  22 #include <linux/module.h>
  23 #include <linux/types.h>
  24 #include <linux/string.h>
  25 #include <linux/kernel.h>
  26 #include <linux/timer.h>
  27 #include <linux/mm.h>
  28 #include <linux/interrupt.h>
  29 #include <linux/major.h>
  30 #include <linux/errno.h>
  31 #include <linux/genhd.h>
  32 #include <linux/slab.h>
  33 #include <linux/delay.h>
  34 #include <linux/mutex.h>
  35 #include <linux/leds.h>
  36
  37 #define _IDE_DISK
  38
  39 #include <linux/ide.h>
  40
  41 #include <asm/byteorder.h>
  42 #include <asm/irq.h>
  43 #include <asm/uaccess.h>
  44 #include <asm/io.h>
  45 #include <asm/div64.h>
  46
  47 struct ide_disk_obj {
  48         ide_drive_t     *drive;
  49         ide_driver_t    *driver;
  50         struct gendisk  *disk;
  51         struct kref     kref;
  52         unsigned int    openers;        /* protected by BKL for now */
  53 };
  54
  55 static DEFINE_MUTEX(idedisk_ref_mutex);
  56
  57 #define to_ide_disk(obj) container_of(obj, struct ide_disk_obj, kref)
  58
  59 #define ide_disk_g(disk) \
  60         container_of((disk)->private_data, struct ide_disk_obj, driver)
  61
  62 static struct ide_disk_obj *ide_disk_get(struct gendisk *disk)
  63 {
  64         struct ide_disk_obj *idkp = NULL;
  65
  66         mutex_lock(&idedisk_ref_mutex);
  67         idkp = ide_disk_g(disk);
  68         if (idkp)
  69                 kref_get(&idkp->kref);
  70         mutex_unlock(&idedisk_ref_mutex);
  71         return idkp;
  72 }
  73
  74 static void ide_disk_release(struct kref *);
  75
  76 static void ide_disk_put(struct ide_disk_obj *idkp)
  77 {
  78         mutex_lock(&idedisk_ref_mutex);
  79         kref_put(&idkp->kref, ide_disk_release);
  80         mutex_unlock(&idedisk_ref_mutex);
  81 }
  82
  83 /*
  84  * lba_capacity_is_ok() performs a sanity check on the claimed "lba_capacity"
  85  * value for this drive (from its reported identification information).
  86  *
  87  * Returns:     1 if lba_capacity looks sensible
  88  *              0 otherwise
  89  *
  90  * It is called only once for each drive.
  91  */
  92 static int lba_capacity_is_ok (struct hd_driveid *id)
  93 {
  94         unsigned long lba_sects, chs_sects, head, tail;
  95
  96         /* No non-LBA info .. so valid! */
  97         if (id->cyls == 0)
  98                 return 1;
  99
 100         /*
 101          * The ATA spec tells large drives to return
 102          * C/H/S = 16383/16/63 independent of their size.
 103          * Some drives can be jumpered to use 15 heads instead of 16.
 104          * Some drives can be jumpered to use 4092 cyls instead of 16383.
 105          */
 106         if ((id->cyls == 16383
 107              || (id->cyls == 4092 && id->cur_cyls == 16383)) &&
 108             id->sectors == 63 &&
 109             (id->heads == 15 || id->heads == 16) &&
 110             (id->lba_capacity >= 16383*63*id->heads))
 111                 return 1;
 112
 113         lba_sects   = id->lba_capacity;
 114         chs_sects   = id->cyls * id->heads * id->sectors;
 115
 116         /* perform a rough sanity check on lba_sects:  within 10% is OK */
 117         if ((lba_sects - chs_sects) < chs_sects/10)
 118                 return 1;
 119
 120         /* some drives have the word order reversed */
 121         head = ((lba_sects >> 16) & 0xffff);
 122         tail = (lba_sects & 0xffff);
 123         lba_sects = (head | (tail << 16));
 124         if ((lba_sects - chs_sects) < chs_sects/10) {
 125                 id->lba_capacity = lba_sects;
 126                 return 1;       /* lba_capacity is (now) good */
 127         }
 128
 129         return 0;       /* lba_capacity value may be bad */
 130 }
 131
 132 /*
 133  * __ide_do_rw_disk() issues READ and WRITE commands to a disk,
 134  * using LBA if supported, or CHS otherwise, to address sectors.
 135  */
 136 static ide_startstop_t __ide_do_rw_disk(ide_drive_t *drive, struct request *rq, sector_t block)
 137 {
 138         ide_hwif_t *hwif        = HWIF(drive);
 139         unsigned int dma        = drive->using_dma;
 140         u8 lba48                = (drive->addressing == 1) ? 1 : 0;
 141         u8 command              = WIN_NOP;
 142         ata_nsector_t           nsectors;
 143         ide_task_t              task;
 144         struct ide_taskfile     *tf = &task.tf;
 145
 146         nsectors.all            = (u16) rq->nr_sectors;
 147
 148         if ((hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA) && lba48 && dma) {
 149                 if (block + rq->nr_sectors > 1ULL << 28)
 150                         dma = 0;
 151                 else
 152                         lba48 = 0;
 153         }
 154
 155         if (!dma) {
 156                 ide_init_sg_cmd(drive, rq);
 157                 ide_map_sg(drive, rq);
 158         }
 159
 160         memset(&task, 0, sizeof(task));
 161         task.tf_flags = IDE_TFLAG_NO_SELECT_MASK;  /* FIXME? */
 162         task.tf_flags |= (IDE_TFLAG_OUT_TF | IDE_TFLAG_OUT_DEVICE);
 163
 164         if (drive->select.b.lba) {
 165                 if (lba48) {
 166                         pr_debug("%s: LBA=0x%012llx\n", drive->name,
 167                                         (unsigned long long)block);
 168
 169                         tf->hob_nsect = nsectors.b.high;
 170                         tf->hob_lbal  = (u8)(block >> 24);
 171                         if (sizeof(block) != 4) {
 172                                 tf->hob_lbam = (u8)((u64)block >> 32);
 173                                 tf->hob_lbah = (u8)((u64)block >> 40);
 174                         }
 175
 176                         tf->nsect  = nsectors.b.low;
 177                         tf->lbal   = (u8) block;
 178                         tf->lbam   = (u8)(block >>  8);
 179                         tf->lbah   = (u8)(block >> 16);
 180 #ifdef DEBUG
 181                         printk("%s: 0x%02x%02x 0x%02x%02x%02x%02x%02x%02x\n",
 182                                 drive->name, tf->hob_nsect, tf->nsect,
 183                                 tf->hob_lbah, tf->hob_lbam, tf->hob_lbal,
 184                                 tf->lbah, tf->lbam, tf->lbal);
 185 #endif
 186                         task.tf_flags |= (IDE_TFLAG_LBA48 | IDE_TFLAG_OUT_HOB);
 187                 } else {
 188                         tf->nsect  = nsectors.b.low;
 189                         tf->lbal   = block;
 190                         tf->lbam   = block >>= 8;
 191                         tf->lbah   = block >>= 8;
 192                         tf->device = (block >> 8) & 0xf;
 193                 }
 194         } else {
 195                 unsigned int sect,head,cyl,track;
 196                 track = (int)block / drive->sect;
 197                 sect  = (int)block % drive->sect + 1;
 198                 head  = track % drive->head;
 199                 cyl   = track / drive->head;
 200
 201                 pr_debug("%s: CHS=%u/%u/%u\n", drive->name, cyl, head, sect);
 202
 203                 tf->nsect  = nsectors.b.low;
 204                 tf->lbal   = sect;
 205                 tf->lbam   = cyl;
 206                 tf->lbah   = cyl >> 8;
 207                 tf->device = head;
 208         }
 209
 210         ide_tf_load(drive, &task);
 211
 212         if (dma) {
 213                 if (!hwif->dma_setup(drive)) {
 214                         if (rq_data_dir(rq)) {
 215                                 command = lba48 ? WIN_WRITEDMA_EXT : WIN_WRITEDMA;
 216                                 if (drive->vdma)
 217                                         command = lba48 ? WIN_WRITE_EXT: WIN_WRITE;
 218                         } else {
 219                                 command = lba48 ? WIN_READDMA_EXT : WIN_READDMA;
 220                                 if (drive->vdma)
 221                                         command = lba48 ? WIN_READ_EXT: WIN_READ;
 222                         }
 223                         hwif->dma_exec_cmd(drive, command);
 224                         hwif->dma_start(drive);
 225                         return ide_started;
 226                 }
 227                 /* fallback to PIO */
 228                 ide_init_sg_cmd(drive, rq);
 229         }
 230
 231         if (rq_data_dir(rq) == READ) {
 232
 233                 if (drive->mult_count) {
 234                         hwif->data_phase = TASKFILE_MULTI_IN;
 235                         command = lba48 ? WIN_MULTREAD_EXT : WIN_MULTREAD;
 236                 } else {
 237                         hwif->data_phase = TASKFILE_IN;
 238                         command = lba48 ? WIN_READ_EXT : WIN_READ;
 239                 }
 240
 241                 ide_execute_command(drive, command, &task_in_intr, WAIT_CMD, NULL);
 242                 return ide_started;
 243         } else {
 244                 if (drive->mult_count) {
 245                         hwif->data_phase = TASKFILE_MULTI_OUT;
 246                         command = lba48 ? WIN_MULTWRITE_EXT : WIN_MULTWRITE;
 247                 } else {
 248                         hwif->data_phase = TASKFILE_OUT;
 249                         command = lba48 ? WIN_WRITE_EXT : WIN_WRITE;
 250                 }
 251
 252                 /* FIXME: ->OUTBSYNC ? */
 253                 hwif->OUTB(command, IDE_COMMAND_REG);
 254
 255                 return pre_task_out_intr(drive, rq);
 256         }
 257 }
 258
 259 /*
 260  * 268435455  == 137439 MB or 28bit limit
 261  * 320173056  == 163929 MB or 48bit addressing
 262  * 1073741822 == 549756 MB or 48bit addressing fake drive
 263  */
 264
 265 static ide_startstop_t ide_do_rw_disk (ide_drive_t *drive, struct request *rq, sector_t block)
 266 {
 267         ide_hwif_t *hwif = HWIF(drive);
 268
 269         BUG_ON(drive->blocked);
 270
 271         if (!blk_fs_request(rq)) {
 272                 blk_dump_rq_flags(rq, "ide_do_rw_disk - bad command");
 273                 ide_end_request(drive, 0, 0);
 274                 return ide_stopped;
 275         }
 276
 277         ledtrig_ide_activity();
 278
 279         pr_debug("%s: %sing: block=%llu, sectors=%lu, buffer=0x%08lx\n",
 280                  drive->name, rq_data_dir(rq) == READ ? "read" : "writ",
 281                  (unsigned long long)block, rq->nr_sectors,
 282                  (unsigned long)rq->buffer);
 283
 284         if (hwif->rw_disk)
 285                 hwif->rw_disk(drive, rq);
 286
 287         return __ide_do_rw_disk(drive, rq, block);
 288 }
 289
 290 /*
 291  * Queries for true maximum capacity of the drive.
 292  * Returns maximum LBA address (> 0) of the drive, 0 if failed.
 293  */
 294 static u64 idedisk_read_native_max_address(ide_drive_t *drive, int lba48)
 295 {
 296         ide_task_t args;
 297         struct ide_taskfile *tf = &args.tf;
 298         u64 addr = 0;
 299
 300         /* Create IDE/ATA command request structure */
 301         memset(&args, 0, sizeof(ide_task_t));
 302         if (lba48)
 303                 tf->command = WIN_READ_NATIVE_MAX_EXT;
 304         else
 305                 tf->command = WIN_READ_NATIVE_MAX;
 306         tf->device  = ATA_LBA;
 307         args.tf_flags = IDE_TFLAG_OUT_TF | IDE_TFLAG_OUT_DEVICE;
 308         if (lba48)
 309                 args.tf_flags |= (IDE_TFLAG_LBA48 | IDE_TFLAG_OUT_HOB);
 310         /* submit command request */
 311         ide_no_data_taskfile(drive, &args);
 312
 313         /* if OK, compute maximum address value */
 314         if ((tf->status & 0x01) == 0) {
 315                 u32 high, low;
 316
 317                 if (lba48)
 318                         high = (tf->hob_lbah << 16) | (tf->hob_lbam << 8) |
 319                                 tf->hob_lbal;
 320                 else
 321                         high = tf->device & 0xf;
 322                 low  = (tf->lbah << 16) | (tf->lbam << 8) | tf->lbal;
 323                 addr = ((__u64)high << 24) | low;
 324                 addr++; /* since the return value is (maxlba - 1), we add 1 */
 325         }
 326         return addr;
 327 }
 328
 329 /*
 330  * Sets maximum virtual LBA address of the drive.
 331  * Returns new maximum virtual LBA address (> 0) or 0 on failure.
 332  */
 333 static u64 idedisk_set_max_address(ide_drive_t *drive, u64 addr_req, int lba48)
 334 {
 335         ide_task_t args;
 336         struct ide_taskfile *tf = &args.tf;
 337         u64 addr_set = 0;
 338
 339         addr_req--;
 340         /* Create IDE/ATA command request structure */
 341         memset(&args, 0, sizeof(ide_task_t));
 342         tf->lbal     = (addr_req >>  0) & 0xff;
 343         tf->lbam     = (addr_req >>= 8) & 0xff;
 344         tf->lbah     = (addr_req >>= 8) & 0xff;
 345         if (lba48) {
 346                 tf->hob_lbal = (addr_req >>= 8) & 0xff;
 347                 tf->hob_lbam = (addr_req >>= 8) & 0xff;
 348                 tf->hob_lbah = (addr_req >>= 8) & 0xff;
 349                 tf->command  = WIN_SET_MAX_EXT;
 350         } else {
 351                 tf->device   = (addr_req >>= 8) & 0x0f;
 352                 tf->command  = WIN_SET_MAX;
 353         }
 354         tf->device |= ATA_LBA;
 355         args.tf_flags = IDE_TFLAG_OUT_TF | IDE_TFLAG_OUT_DEVICE;
 356         if (lba48)
 357                 args.tf_flags |= (IDE_TFLAG_LBA48 | IDE_TFLAG_OUT_HOB);
 358         /* submit command request */
 359         ide_no_data_taskfile(drive, &args);
 360         /* if OK, compute maximum address value */
 361         if ((tf->status & 0x01) == 0) {
 362                 u32 high, low;
 363
 364                 if (lba48)
 365                         high = (tf->hob_lbah << 16) | (tf->hob_lbam << 8) |
 366                                 tf->hob_lbal;
 367                 else
 368                         high = tf->device & 0xf;
 369                 low  = (tf->lbah << 16) | (tf->lbam << 8) | tf->lbal;
 370                 addr_set = ((__u64)high << 24) | low;
 371                 addr_set++;
 372         }
 373         return addr_set;
 374 }
 375
 376 static unsigned long long sectors_to_MB(unsigned long long n)
 377 {
 378         n <<= 9;                /* make it bytes */
 379         do_div(n, 1000000);     /* make it MB */
 380         return n;
 381 }
 382
 383 /*
 384  * Bits 10 of command_set_1 and cfs_enable_1 must be equal,
 385  * so on non-buggy drives we need test only one.
 386  * However, we should also check whether these fields are valid.
 387  */
 388 static inline int idedisk_supports_hpa(const struct hd_driveid *id)
 389 {
 390         return (id->command_set_1 & 0x0400) && (id->cfs_enable_1 & 0x0400);
 391 }
 392
 393 /*
 394  * The same here.
 395  */
 396 static inline int idedisk_supports_lba48(const struct hd_driveid *id)
 397 {
 398         return (id->command_set_2 & 0x0400) && (id->cfs_enable_2 & 0x0400)
 399                && id->lba_capacity_2;
 400 }
 401
 402 /*
 403  * Some disks report total number of sectors instead of
 404  * maximum sector address.  We list them here.
 405  */
 406 static const struct drive_list_entry hpa_list[] = {
 407         { "ST340823A",  NULL },
 408         { "ST320413A",  NULL },
 409         { NULL,         NULL }
 410 };
 411
 412 static void idedisk_check_hpa(ide_drive_t *drive)
 413 {
 414         unsigned long long capacity, set_max;
 415         int lba48 = idedisk_supports_lba48(drive->id);
 416
 417         capacity = drive->capacity64;
 418
 419         set_max = idedisk_read_native_max_address(drive, lba48);
 420
 421         if (ide_in_drive_list(drive->id, hpa_list)) {
 422                 /*
 423                  * Since we are inclusive wrt to firmware revisions do this
 424                  * extra check and apply the workaround only when needed.
 425                  */
 426                 if (set_max == capacity + 1)
 427                         set_max--;
 428         }
 429
 430         if (set_max <= capacity)
 431                 return;
 432
 433         printk(KERN_INFO "%s: Host Protected Area detected.\n"
 434                          "\tcurrent capacity is %llu sectors (%llu MB)\n"
 435                          "\tnative  capacity is %llu sectors (%llu MB)\n",
 436                          drive->name,
 437                          capacity, sectors_to_MB(capacity),
 438                          set_max, sectors_to_MB(set_max));
 439
 440         set_max = idedisk_set_max_address(drive, set_max, lba48);
 441
 442         if (set_max) {
 443                 drive->capacity64 = set_max;
 444                 printk(KERN_INFO "%s: Host Protected Area disabled.\n",
 445                                  drive->name);
 446         }
 447 }
 448
 449 /*
 450  * Compute drive->capacity, the full capacity of the drive
 451  * Called with drive->id != NULL.
 452  *
 453  * To compute capacity, this uses either of
 454  *
 455  *    1. CHS value set by user       (whatever user sets will be trusted)
 456  *    2. LBA value from target drive (require new ATA feature)
 457  *    3. LBA value from system BIOS  (new one is OK, old one may break)
 458  *    4. CHS value from system BIOS  (traditional style)
 459  *
 460  * in above order (i.e., if value of higher priority is available,
 461  * reset will be ignored).
 462  */
 463 static void init_idedisk_capacity (ide_drive_t  *drive)
 464 {
 465         struct hd_driveid *id = drive->id;
 466         /*
 467          * If this drive supports the Host Protected Area feature set,
 468          * then we may need to change our opinion about the drive's capacity.
 469          */
 470         int hpa = idedisk_supports_hpa(id);
 471
 472         if (idedisk_supports_lba48(id)) {
 473                 /* drive speaks 48-bit LBA */
 474                 drive->select.b.lba = 1;
 475                 drive->capacity64 = id->lba_capacity_2;
 476                 if (hpa)
 477                         idedisk_check_hpa(drive);
 478         } else if ((id->capability & 2) && lba_capacity_is_ok(id)) {
 479                 /* drive speaks 28-bit LBA */
 480                 drive->select.b.lba = 1;
 481                 drive->capacity64 = id->lba_capacity;
 482                 if (hpa)
 483                         idedisk_check_hpa(drive);
 484         } else {
 485                 /* drive speaks boring old 28-bit CHS */
 486                 drive->capacity64 = drive->cyl * drive->head * drive->sect;
 487         }
 488 }
 489
 490 static sector_t idedisk_capacity (ide_drive_t *drive)
 491 {
 492         return drive->capacity64 - drive->sect0;
 493 }
 494
 495 #ifdef CONFIG_IDE_PROC_FS
 496 static int smart_enable(ide_drive_t *drive)
 497 {
 498         ide_task_t args;
 499         struct ide_taskfile *tf = &args.tf;
 500
 501         memset(&args, 0, sizeof(ide_task_t));
 502         tf->feature = SMART_ENABLE;
 503         tf->lbam    = SMART_LCYL_PASS;
 504         tf->lbah    = SMART_HCYL_PASS;
 505         tf->command = WIN_SMART;
 506         args.tf_flags = IDE_TFLAG_OUT_TF | IDE_TFLAG_OUT_DEVICE;
 507         return ide_no_data_taskfile(drive, &args);
 508 }
 509
 510 static int get_smart_data(ide_drive_t *drive, u8 *buf, u8 sub_cmd)
 511 {
 512         ide_task_t args;
 513         struct ide_taskfile *tf = &args.tf;
 514
 515         memset(&args, 0, sizeof(ide_task_t));
 516         tf->feature = sub_cmd;
 517         tf->nsect   = 0x01;
 518         tf->lbam    = SMART_LCYL_PASS;
 519         tf->lbah    = SMART_HCYL_PASS;
 520         tf->command = WIN_SMART;
 521         args.tf_flags = IDE_TFLAG_OUT_TF | IDE_TFLAG_OUT_DEVICE;
 522         args.command_type                       = IDE_DRIVE_TASK_IN;
 523         args.data_phase                         = TASKFILE_IN;
 524         args.handler                            = &task_in_intr;
 525         (void) smart_enable(drive);
 526         return ide_raw_taskfile(drive, &args, buf);
 527 }
 528
 529 static int proc_idedisk_read_cache
 530         (char *page, char **start, off_t off, int count, int *eof, void *data)
 531 {
 532         ide_drive_t     *drive = (ide_drive_t *) data;
 533         char            *out = page;
 534         int             len;
 535
 536         if (drive->id_read)
 537                 len = sprintf(out,"%i\n", drive->id->buf_size / 2);
 538         else
 539                 len = sprintf(out,"(none)\n");
 540         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
 541 }
 542
 543 static int proc_idedisk_read_capacity
 544         (char *page, char **start, off_t off, int count, int *eof, void *data)
 545 {
 546         ide_drive_t*drive = (ide_drive_t *)data;
 547         int len;
 548
 549         len = sprintf(page,"%llu\n", (long long)idedisk_capacity(drive));
 550         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
 551 }
 552
 553 static int proc_idedisk_read_smart_thresholds
 554         (char *page, char **start, off_t off, int count, int *eof, void *data)
 555 {
 556         ide_drive_t     *drive = (ide_drive_t *)data;
 557         int             len = 0, i = 0;
 558
 559         if (get_smart_data(drive, page, SMART_READ_THRESHOLDS) == 0) {
 560                 unsigned short *val = (unsigned short *) page;
 561                 char *out = ((char *)val) + (SECTOR_WORDS * 4);
 562                 page = out;
 563                 do {
 564                         out += sprintf(out, "%04x%c", le16_to_cpu(*val), (++i & 7) ? ' ' : '\n');
 565                         val += 1;
 566                 } while (i < (SECTOR_WORDS * 2));
 567                 len = out - page;
 568         }
 569         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
 570 }
 571
 572 static int proc_idedisk_read_smart_values
 573         (char *page, char **start, off_t off, int count, int *eof, void *data)
 574 {
 575         ide_drive_t     *drive = (ide_drive_t *)data;
 576         int             len = 0, i = 0;
 577
 578         if (get_smart_data(drive, page, SMART_READ_VALUES) == 0) {
 579                 unsigned short *val = (unsigned short *) page;
 580                 char *out = ((char *)val) + (SECTOR_WORDS * 4);
 581                 page = out;
 582                 do {
 583                         out += sprintf(out, "%04x%c", le16_to_cpu(*val), (++i & 7) ? ' ' : '\n');
 584                         val += 1;
 585                 } while (i < (SECTOR_WORDS * 2));
 586                 len = out - page;
 587         }
 588         PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
 589 }
 590
 591 static ide_proc_entry_t idedisk_proc[] = {
 592         { "cache",              S_IFREG|S_IRUGO,        proc_idedisk_read_cache,                NULL },
 593         { "capacity",           S_IFREG|S_IRUGO,        proc_idedisk_read_capacity,             NULL },
 594         { "geometry",           S_IFREG|S_IRUGO,        proc_ide_read_geometry,                 NULL },
 595         { "smart_values",       S_IFREG|S_IRUSR,        proc_idedisk_read_smart_values,         NULL },
 596         { "smart_thresholds",   S_IFREG|S_IRUSR,        proc_idedisk_read_smart_thresholds,     NULL },
 597         { NULL, 0, NULL, NULL }
 598 };
 599 #endif  /* CONFIG_IDE_PROC_FS */
 600
 601 static void idedisk_prepare_flush(struct request_queue *q, struct request *rq)
 602 {
 603         ide_drive_t *drive = q->queuedata;
 604
 605         memset(rq->cmd, 0, sizeof(rq->cmd));
 606
 607         if (ide_id_has_flush_cache_ext(drive->id) &&
 608             (drive->capacity64 >= (1UL << 28)))
 609                 rq->cmd[0] = WIN_FLUSH_CACHE_EXT;
 610         else
 611                 rq->cmd[0] = WIN_FLUSH_CACHE;
 612
 613
 614         rq->cmd_type = REQ_TYPE_ATA_TASK;
 615         rq->cmd_flags |= REQ_SOFTBARRIER;
 616         rq->buffer = rq->cmd;
 617 }
 618
 619 /*
 620  * This is tightly woven into the driver->do_special can not touch.
 621  * DON'T do it again until a total personality rewrite is committed.
 622  */
 623 static int set_multcount(ide_drive_t *drive, int arg)
 624 {
 625         struct request rq;
 626
 627         if (arg < 0 || arg > drive->id->max_multsect)
 628                 return -EINVAL;
 629
 630         if (drive->special.b.set_multmode)
 631                 return -EBUSY;
 632         ide_init_drive_cmd (&rq);
 633         rq.cmd_type = REQ_TYPE_ATA_CMD;
 634         drive->mult_req = arg;
 635         drive->special.b.set_multmode = 1;
 636         (void) ide_do_drive_cmd (drive, &rq, ide_wait);
 637         return (drive->mult_count == arg) ? 0 : -EIO;
 638 }
 639
 640 static int set_nowerr(ide_drive_t *drive, int arg)
 641 {
 642         if (arg < 0 || arg > 1)
 643                 return -EINVAL;
 644
 645         if (ide_spin_wait_hwgroup(drive))
 646                 return -EBUSY;
 647         drive->nowerr = arg;
 648         drive->bad_wstat = arg ? BAD_R_STAT : BAD_W_STAT;
 649         spin_unlock_irq(&ide_lock);
 650         return 0;
 651 }
 652
 653 static void update_ordered(ide_drive_t *drive)
 654 {
 655         struct hd_driveid *id = drive->id;
 656         unsigned ordered = QUEUE_ORDERED_NONE;
 657         prepare_flush_fn *prep_fn = NULL;
 658
 659         if (drive->wcache) {
 660                 unsigned long long capacity;
 661                 int barrier;
 662                 /*
 663                  * We must avoid issuing commands a drive does not
 664                  * understand or we may crash it. We check flush cache
 665                  * is supported. We also check we have the LBA48 flush
 666                  * cache if the drive capacity is too large. By this
 667                  * time we have trimmed the drive capacity if LBA48 is
 668                  * not available so we don't need to recheck that.
 669                  */
 670                 capacity = idedisk_capacity(drive);
 671                 barrier = ide_id_has_flush_cache(id) && !drive->noflush &&
 672                         (drive->addressing == 0 || capacity <= (1ULL << 28) ||
 673                          ide_id_has_flush_cache_ext(id));
 674
 675                 printk(KERN_INFO "%s: cache flushes %ssupported\n",
 676                        drive->name, barrier ? "" : "not ");
 677
 678                 if (barrier) {
 679                         ordered = QUEUE_ORDERED_DRAIN_FLUSH;
 680                         prep_fn = idedisk_prepare_flush;
 681                 }
 682         } else
 683                 ordered = QUEUE_ORDERED_DRAIN;
 684
 685         blk_queue_ordered(drive->queue, ordered, prep_fn);
 686 }
 687
 688 static int write_cache(ide_drive_t *drive, int arg)
 689 {
 690         ide_task_t args;
 691         int err = 1;
 692
 693         if (arg < 0 || arg > 1)
 694                 return -EINVAL;
 695
 696         if (ide_id_has_flush_cache(drive->id)) {
 697                 memset(&args, 0, sizeof(ide_task_t));
 698                 args.tf.feature = arg ?
 699                         SETFEATURES_EN_WCACHE : SETFEATURES_DIS_WCACHE;
 700                 args.tf.command = WIN_SETFEATURES;
 701                 args.tf_flags = IDE_TFLAG_OUT_TF | IDE_TFLAG_OUT_DEVICE;
 702                 err = ide_no_data_taskfile(drive, &args);
 703                 if (err == 0)
 704                         drive->wcache = arg;
 705         }
 706
 707         update_ordered(drive);
 708
 709         return err;
 710 }
 711
 712 static int do_idedisk_flushcache (ide_drive_t *drive)
 713 {
 714         ide_task_t args;
 715
 716         memset(&args, 0, sizeof(ide_task_t));
 717         if (ide_id_has_flush_cache_ext(drive->id))
 718                 args.tf.command = WIN_FLUSH_CACHE_EXT;
 719         else
 720                 args.tf.command = WIN_FLUSH_CACHE;
 721         args.tf_flags = IDE_TFLAG_OUT_TF | IDE_TFLAG_OUT_DEVICE;
 722         return ide_no_data_taskfile(drive, &args);
 723 }
 724
 725 static int set_acoustic (ide_drive_t *drive, int arg)
 726 {
 727         ide_task_t args;
 728
 729         if (arg < 0 || arg > 254)
 730                 return -EINVAL;
 731
 732         memset(&args, 0, sizeof(ide_task_t));
 733         args.tf.feature = arg ? SETFEATURES_EN_AAM : SETFEATURES_DIS_AAM;
 734         args.tf.nsect   = arg;
 735         args.tf.command = WIN_SETFEATURES;
 736         args.tf_flags = IDE_TFLAG_OUT_TF | IDE_TFLAG_OUT_DEVICE;
 737         ide_no_data_taskfile(drive, &args);
 738         drive->acoustic = arg;
 739         return 0;
 740 }
 741
 742 /*
 743  * drive->addressing:
 744  *      0: 28-bit
 745  *      1: 48-bit
 746  *      2: 48-bit capable doing 28-bit
 747  */
 748 static int set_lba_addressing(ide_drive_t *drive, int arg)
 749 {
 750         if (arg < 0 || arg > 2)
 751                 return -EINVAL;
 752
 753         drive->addressing =  0;
 754
 755         if (drive->hwif->host_flags & IDE_HFLAG_NO_LBA48)
 756                 return 0;
 757
 758         if (!idedisk_supports_lba48(drive->id))
 759                 return -EIO;
 760         drive->addressing = arg;
 761         return 0;
 762 }
 763
 764 #ifdef CONFIG_IDE_PROC_FS
 765 static void idedisk_add_settings(ide_drive_t *drive)
 766 {
 767         struct hd_driveid *id = drive->id;
 768
 769         ide_add_setting(drive,  "bios_cyl",     SETTING_RW,     TYPE_INT,       0,      65535,                  1,      1,      &drive->bios_cyl,       NULL);
 770         ide_add_setting(drive,  "bios_head",    SETTING_RW,     TYPE_BYTE,      0,      255,                    1,      1,      &drive->bios_head,      NULL);
 771         ide_add_setting(drive,  "bios_sect",    SETTING_RW,     TYPE_BYTE,      0,      63,                     1,      1,      &drive->bios_sect,      NULL);
 772         ide_add_setting(drive,  "address",      SETTING_RW,     TYPE_BYTE,      0,      2,                      1,      1,      &drive->addressing,     set_lba_addressing);
 773         ide_add_setting(drive,  "bswap",        SETTING_READ,   TYPE_BYTE,      0,      1,                      1,      1,      &drive->bswap,          NULL);
 774         ide_add_setting(drive,  "multcount",    SETTING_RW,     TYPE_BYTE,      0,      id->max_multsect,       1,      1,      &drive->mult_count,     set_multcount);
 775         ide_add_setting(drive,  "nowerr",       SETTING_RW,     TYPE_BYTE,      0,      1,                      1,      1,      &drive->nowerr,         set_nowerr);
 776         ide_add_setting(drive,  "lun",          SETTING_RW,     TYPE_INT,       0,      7,                      1,      1,      &drive->lun,            NULL);
 777         ide_add_setting(drive,  "wcache",       SETTING_RW,     TYPE_BYTE,      0,      1,                      1,      1,      &drive->wcache,         write_cache);
 778         ide_add_setting(drive,  "acoustic",     SETTING_RW,     TYPE_BYTE,      0,      254,                    1,      1,      &drive->acoustic,       set_acoustic);
 779         ide_add_setting(drive,  "failures",     SETTING_RW,     TYPE_INT,       0,      65535,                  1,      1,      &drive->failures,       NULL);
 780         ide_add_setting(drive,  "max_failures", SETTING_RW,     TYPE_INT,       0,      65535,                  1,      1,      &drive->max_failures,   NULL);
 781 }
 782 #else
 783 static inline void idedisk_add_settings(ide_drive_t *drive) { ; }
 784 #endif
 785
 786 static void idedisk_setup (ide_drive_t *drive)
 787 {
 788         ide_hwif_t *hwif = drive->hwif;
 789         struct hd_driveid *id = drive->id;
 790         unsigned long long capacity;
 791
 792         idedisk_add_settings(drive);
 793
 794         if (drive->id_read == 0)
 795                 return;
 796
 797         if (drive->removable) {
 798                 /*
 799                  * Removable disks (eg. SYQUEST); ignore 'WD' drives
 800                  */
 801                 if (id->model[0] != 'W' || id->model[1] != 'D') {
 802                         drive->doorlocking = 1;
 803                 }
 804         }
 805
 806         (void)set_lba_addressing(drive, 1);
 807
 808         if (drive->addressing == 1) {
 809                 int max_s = 2048;
 810
 811                 if (max_s > hwif->rqsize)
 812                         max_s = hwif->rqsize;
 813
 814                 blk_queue_max_sectors(drive->queue, max_s);
 815         }
 816
 817         printk(KERN_INFO "%s: max request size: %dKiB\n", drive->name, drive->queue->max_sectors / 2);
 818
 819         /* calculate drive capacity, and select LBA if possible */
 820         init_idedisk_capacity (drive);
 821
 822         /* limit drive capacity to 137GB if LBA48 cannot be used */
 823         if (drive->addressing == 0 && drive->capacity64 > 1ULL << 28) {
 824                 printk(KERN_WARNING "%s: cannot use LBA48 - full capacity "
 825                        "%llu sectors (%llu MB)\n",
 826                        drive->name, (unsigned long long)drive->capacity64,
 827                        sectors_to_MB(drive->capacity64));
 828                 drive->capacity64 = 1ULL << 28;
 829         }
 830
 831         if ((hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA) && drive->addressing) {
 832                 if (drive->capacity64 > 1ULL << 28) {
 833                         printk(KERN_INFO "%s: cannot use LBA48 DMA - PIO mode will"
 834                                          " be used for accessing sectors > %u\n",
 835                                          drive->name, 1 << 28);
 836                 } else
 837                         drive->addressing = 0;
 838         }
 839
 840         /*
 841          * if possible, give fdisk access to more of the drive,
 842          * by correcting bios_cyls:
 843          */
 844         capacity = idedisk_capacity (drive);
 845         if (!drive->forced_geom) {
 846
 847                 if (idedisk_supports_lba48(drive->id)) {
 848                         /* compatibility */
 849                         drive->bios_sect = 63;
 850                         drive->bios_head = 255;
 851                 }
 852
 853                 if (drive->bios_sect && drive->bios_head) {
 854                         unsigned int cap0 = capacity; /* truncate to 32 bits */
 855                         unsigned int cylsz, cyl;
 856
 857                         if (cap0 != capacity)
 858                                 drive->bios_cyl = 65535;
 859                         else {
 860                                 cylsz = drive->bios_sect * drive->bios_head;
 861                                 cyl = cap0 / cylsz;
 862                                 if (cyl > 65535)
 863                                         cyl = 65535;
 864                                 if (cyl > drive->bios_cyl)
 865                                         drive->bios_cyl = cyl;
 866                         }
 867                 }
 868         }
 869         printk(KERN_INFO "%s: %llu sectors (%llu MB)",
 870                          drive->name, capacity, sectors_to_MB(capacity));
 871
 872         /* Only print cache size when it was specified */
 873         if (id->buf_size)
 874                 printk (" w/%dKiB Cache", id->buf_size/2);
 875
 876         printk(KERN_CONT ", CHS=%d/%d/%d\n",
 877                          drive->bios_cyl, drive->bios_head, drive->bios_sect);
 878
 879         /* write cache enabled? */
 880         if ((id->csfo & 1) || (id->cfs_enable_1 & (1 << 5)))
 881                 drive->wcache = 1;
 882
 883         write_cache(drive, 1);
 884 }
 885
 886 static void ide_cacheflush_p(ide_drive_t *drive)
 887 {
 888         if (!drive->wcache || !ide_id_has_flush_cache(drive->id))
 889                 return;
 890
 891         if (do_idedisk_flushcache(drive))
 892                 printk(KERN_INFO "%s: wcache flush failed!\n", drive->name);
 893 }
 894
 895 static void ide_disk_remove(ide_drive_t *drive)
 896 {
 897         struct ide_disk_obj *idkp = drive->driver_data;
 898         struct gendisk *g = idkp->disk;
 899
 900         ide_proc_unregister_driver(drive, idkp->driver);
 901
 902         del_gendisk(g);
 903
 904         ide_cacheflush_p(drive);
 905
 906         ide_disk_put(idkp);
 907 }
 908
 909 static void ide_disk_release(struct kref *kref)
 910 {
 911         struct ide_disk_obj *idkp = to_ide_disk(kref);
 912         ide_drive_t *drive = idkp->drive;
 913         struct gendisk *g = idkp->disk;
 914
 915         drive->driver_data = NULL;
 916         g->private_data = NULL;
 917         put_disk(g);
 918         kfree(idkp);
 919 }
 920
 921 static int ide_disk_probe(ide_drive_t *drive);
 922
 923 /*
 924  * On HPA drives the capacity needs to be
 925  * reinitilized on resume otherwise the disk
 926  * can not be used and a hard reset is required
 927  */
 928 static void ide_disk_resume(ide_drive_t *drive)
 929 {
 930         if (idedisk_supports_hpa(drive->id))
 931                 init_idedisk_capacity(drive);
 932 }
 933
 934 static void ide_device_shutdown(ide_drive_t *drive)
 935 {
 936 #ifdef  CONFIG_ALPHA
 937         /* On Alpha, halt(8) doesn't actually turn the machine off,
 938            it puts you into the sort of firmware monitor. Typically,
 939            it's used to boot another kernel image, so it's not much
 940            different from reboot(8). Therefore, we don't need to
 941            spin down the disk in this case, especially since Alpha
 942            firmware doesn't handle disks in standby mode properly.
 943            On the other hand, it's reasonably safe to turn the power
 944            off when the shutdown process reaches the firmware prompt,
 945            as the firmware initialization takes rather long time -
 946            at least 10 seconds, which should be sufficient for
 947            the disk to expire its write cache. */
 948         if (system_state != SYSTEM_POWER_OFF) {
 949 #else
 950         if (system_state == SYSTEM_RESTART) {
 951 #endif
 952                 ide_cacheflush_p(drive);
 953                 return;
 954         }
 955
 956         printk("Shutdown: %s\n", drive->name);
 957         drive->gendev.bus->suspend(&drive->gendev, PMSG_SUSPEND);
 958 }
 959
 960 static ide_driver_t idedisk_driver = {
 961         .gen_driver = {
 962                 .owner          = THIS_MODULE,
 963                 .name           = "ide-disk",
 964                 .bus            = &ide_bus_type,
 965         },
 966         .probe                  = ide_disk_probe,
 967         .remove                 = ide_disk_remove,
 968         .resume                 = ide_disk_resume,
 969         .shutdown               = ide_device_shutdown,
 970         .version                = IDEDISK_VERSION,
 971         .media                  = ide_disk,
 972         .supports_dsc_overlap   = 0,
 973         .do_request             = ide_do_rw_disk,
 974         .end_request            = ide_end_request,
 975         .error                  = __ide_error,
 976         .abort                  = __ide_abort,
 977 #ifdef CONFIG_IDE_PROC_FS
 978         .proc                   = idedisk_proc,
 979 #endif
 980 };
 981
 982 static int idedisk_open(struct inode *inode, struct file *filp)
 983 {
 984         struct gendisk *disk = inode->i_bdev->bd_disk;
 985         struct ide_disk_obj *idkp;
 986         ide_drive_t *drive;
 987
 988         if (!(idkp = ide_disk_get(disk)))
 989                 return -ENXIO;
 990
 991         drive = idkp->drive;
 992
 993         idkp->openers++;
 994
 995         if (drive->removable && idkp->openers == 1) {
 996                 ide_task_t args;
 997                 memset(&args, 0, sizeof(ide_task_t));
 998                 args.tf.command = WIN_DOORLOCK;
 999                 args.tf_flags = IDE_TFLAG_OUT_TF | IDE_TFLAG_OUT_DEVICE;
1000                 check_disk_change(inode->i_bdev);
1001                 /*
1002                  * Ignore the return code from door_lock,
1003                  * since the open() has already succeeded,
1004                  * and the door_lock is irrelevant at this point.
1005                  */
1006                 if (drive->doorlocking && ide_no_data_taskfile(drive, &args))
1007                         drive->doorlocking = 0;
1008         }
1009         return 0;
1010 }
1011
1012 static int idedisk_release(struct inode *inode, struct file *filp)
1013 {
1014         struct gendisk *disk = inode->i_bdev->bd_disk;
1015         struct ide_disk_obj *idkp = ide_disk_g(disk);
1016         ide_drive_t *drive = idkp->drive;
1017
1018         if (idkp->openers == 1)
1019                 ide_cacheflush_p(drive);
1020
1021         if (drive->removable && idkp->openers == 1) {
1022                 ide_task_t args;
1023                 memset(&args, 0, sizeof(ide_task_t));
1024                 args.tf.command = WIN_DOORUNLOCK;
1025                 args.tf_flags = IDE_TFLAG_OUT_TF | IDE_TFLAG_OUT_DEVICE;
1026                 if (drive->doorlocking && ide_no_data_taskfile(drive, &args))
1027                         drive->doorlocking = 0;
1028         }
1029
1030         idkp->openers--;
1031
1032         ide_disk_put(idkp);
1033
1034         return 0;
1035 }
1036
1037 static int idedisk_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1038 {
1039         struct ide_disk_obj *idkp = ide_disk_g(bdev->bd_disk);
1040         ide_drive_t *drive = idkp->drive;
1041
1042         geo->heads = drive->bios_head;
1043         geo->sectors = drive->bios_sect;
1044         geo->cylinders = (u16)drive->bios_cyl; /* truncate */
1045         return 0;
1046 }
1047
1048 static int idedisk_ioctl(struct inode *inode, struct file *file,
1049                         unsigned int cmd, unsigned long arg)
1050 {
1051         unsigned long flags;
1052         struct block_device *bdev = inode->i_bdev;
1053         struct ide_disk_obj *idkp = ide_disk_g(bdev->bd_disk);
1054         ide_drive_t *drive = idkp->drive;
1055         int err, (*setfunc)(ide_drive_t *, int);
1056         u8 *val;
1057
1058         switch (cmd) {
1059         case HDIO_GET_ADDRESS:   val = &drive->addressing;      goto read_val;
1060         case HDIO_GET_MULTCOUNT: val = &drive->mult_count;      goto read_val;
1061         case HDIO_GET_NOWERR:    val = &drive->nowerr;          goto read_val;
1062         case HDIO_GET_WCACHE:    val = &drive->wcache;          goto read_val;
1063         case HDIO_GET_ACOUSTIC:  val = &drive->acoustic;        goto read_val;
1064         case HDIO_SET_ADDRESS:   setfunc = set_lba_addressing;  goto set_val;
1065         case HDIO_SET_MULTCOUNT: setfunc = set_multcount;       goto set_val;
1066         case HDIO_SET_NOWERR:    setfunc = set_nowerr;          goto set_val;
1067         case HDIO_SET_WCACHE:    setfunc = write_cache;         goto set_val;
1068         case HDIO_SET_ACOUSTIC:  setfunc = set_acoustic;        goto set_val;
1069         }
1070
1071         return generic_ide_ioctl(drive, file, bdev, cmd, arg);
1072
1073 read_val:
1074         mutex_lock(&ide_setting_mtx);
1075         spin_lock_irqsave(&ide_lock, flags);
1076         err = *val;
1077         spin_unlock_irqrestore(&ide_lock, flags);
1078         mutex_unlock(&ide_setting_mtx);
1079         return err >= 0 ? put_user(err, (long __user *)arg) : err;
1080
1081 set_val:
1082         if (bdev != bdev->bd_contains)
1083                 err = -EINVAL;
1084         else {
1085                 if (!capable(CAP_SYS_ADMIN))
1086                         err = -EACCES;
1087                 else {
1088                         mutex_lock(&ide_setting_mtx);
1089                         err = setfunc(drive, arg);
1090                         mutex_unlock(&ide_setting_mtx);
1091                 }
1092         }
1093         return err;
1094 }
1095
1096 static int idedisk_media_changed(struct gendisk *disk)
1097 {
1098         struct ide_disk_obj *idkp = ide_disk_g(disk);
1099         ide_drive_t *drive = idkp->drive;
1100
1101         /* do not scan partitions twice if this is a removable device */
1102         if (drive->attach) {
1103                 drive->attach = 0;
1104                 return 0;
1105         }
1106         /* if removable, always assume it was changed */
1107         return drive->removable;
1108 }
1109
1110 static int idedisk_revalidate_disk(struct gendisk *disk)
1111 {
1112         struct ide_disk_obj *idkp = ide_disk_g(disk);
1113         set_capacity(disk, idedisk_capacity(idkp->drive));
1114         return 0;
1115 }
1116
1117 static struct block_device_operations idedisk_ops = {
1118         .owner          = THIS_MODULE,
1119         .open           = idedisk_open,
1120         .release        = idedisk_release,
1121         .ioctl          = idedisk_ioctl,
1122         .getgeo         = idedisk_getgeo,
1123         .media_changed  = idedisk_media_changed,
1124         .revalidate_disk= idedisk_revalidate_disk
1125 };
1126
1127 MODULE_DESCRIPTION("ATA DISK Driver");
1128
1129 static int ide_disk_probe(ide_drive_t *drive)
1130 {
1131         struct ide_disk_obj *idkp;
1132         struct gendisk *g;
1133
1134         /* strstr("foo", "") is non-NULL */
1135         if (!strstr("ide-disk", drive->driver_req))
1136                 goto failed;
1137         if (!drive->present)
1138                 goto failed;
1139         if (drive->media != ide_disk)
1140                 goto failed;
1141
1142         idkp = kzalloc(sizeof(*idkp), GFP_KERNEL);
1143         if (!idkp)
1144                 goto failed;
1145
1146         g = alloc_disk_node(1 << PARTN_BITS,
1147                         hwif_to_node(drive->hwif));
1148         if (!g)
1149                 goto out_free_idkp;
1150
1151         ide_init_disk(g, drive);
1152
1153         ide_proc_register_driver(drive, &idedisk_driver);
1154
1155         kref_init(&idkp->kref);
1156
1157         idkp->drive = drive;
1158         idkp->driver = &idedisk_driver;
1159         idkp->disk = g;
1160
1161         g->private_data = &idkp->driver;
1162
1163         drive->driver_data = idkp;
1164
1165         idedisk_setup(drive);
1166         if ((!drive->head || drive->head > 16) && !drive->select.b.lba) {
1167                 printk(KERN_ERR "%s: INVALID GEOMETRY: %d PHYSICAL HEADS?\n",
1168                         drive->name, drive->head);
1169                 drive->attach = 0;
1170         } else
1171                 drive->attach = 1;
1172
1173         g->minors = 1 << PARTN_BITS;
1174         g->driverfs_dev = &drive->gendev;
1175         g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0;
1176         set_capacity(g, idedisk_capacity(drive));
1177         g->fops = &idedisk_ops;
1178         add_disk(g);
1179         return 0;
1180
1181 out_free_idkp:
1182         kfree(idkp);
1183 failed:
1184         return -ENODEV;
1185 }
1186
1187 static void __exit idedisk_exit (void)
1188 {
1189         driver_unregister(&idedisk_driver.gen_driver);
1190 }
1191
1192 static int __init idedisk_init(void)
1193 {
1194         return driver_register(&idedisk_driver.gen_driver);
1195 }
1196
1197 MODULE_ALIAS("ide:*m-disk*");
1198 module_init(idedisk_init);
1199 module_exit(idedisk_exit);
1200 MODULE_LICENSE("GPL");