drivers/ide/ide-lib.c

   1 #include <linux/config.h>
   2 #include <linux/module.h>
   3 #include <linux/types.h>
   4 #include <linux/string.h>
   5 #include <linux/kernel.h>
   6 #include <linux/timer.h>
   7 #include <linux/mm.h>
   8 #include <linux/interrupt.h>
   9 #include <linux/major.h>
  10 #include <linux/errno.h>
  11 #include <linux/genhd.h>
  12 #include <linux/blkpg.h>
  13 #include <linux/slab.h>
  14 #include <linux/pci.h>
  15 #include <linux/delay.h>
  16 #include <linux/hdreg.h>
  17 #include <linux/ide.h>
  18 #include <linux/bitops.h>
  19
  20 #include <asm/byteorder.h>
  21 #include <asm/irq.h>
  22 #include <asm/uaccess.h>
  23 #include <asm/io.h>
  24
  25 /*
  26  *      IDE library routines. These are plug in code that most
  27  *      drivers can use but occasionally may be weird enough
  28  *      to want to do their own thing with
  29  *
  30  *      Add common non I/O op stuff here. Make sure it has proper
  31  *      kernel-doc function headers or your patch will be rejected
  32  */
  33
  34
  35 /**
  36  *      ide_xfer_verbose        -       return IDE mode names
  37  *      @xfer_rate: rate to name
  38  *
  39  *      Returns a constant string giving the name of the mode
  40  *      requested.
  41  */
  42
  43 char *ide_xfer_verbose (u8 xfer_rate)
  44 {
  45         switch(xfer_rate) {
  46                 case XFER_UDMA_7:       return("UDMA 7");
  47                 case XFER_UDMA_6:       return("UDMA 6");
  48                 case XFER_UDMA_5:       return("UDMA 5");
  49                 case XFER_UDMA_4:       return("UDMA 4");
  50                 case XFER_UDMA_3:       return("UDMA 3");
  51                 case XFER_UDMA_2:       return("UDMA 2");
  52                 case XFER_UDMA_1:       return("UDMA 1");
  53                 case XFER_UDMA_0:       return("UDMA 0");
  54                 case XFER_MW_DMA_2:     return("MW DMA 2");
  55                 case XFER_MW_DMA_1:     return("MW DMA 1");
  56                 case XFER_MW_DMA_0:     return("MW DMA 0");
  57                 case XFER_SW_DMA_2:     return("SW DMA 2");
  58                 case XFER_SW_DMA_1:     return("SW DMA 1");
  59                 case XFER_SW_DMA_0:     return("SW DMA 0");
  60                 case XFER_PIO_4:        return("PIO 4");
  61                 case XFER_PIO_3:        return("PIO 3");
  62                 case XFER_PIO_2:        return("PIO 2");
  63                 case XFER_PIO_1:        return("PIO 1");
  64                 case XFER_PIO_0:        return("PIO 0");
  65                 case XFER_PIO_SLOW:     return("PIO SLOW");
  66                 default:                return("XFER ERROR");
  67         }
  68 }
  69
  70 EXPORT_SYMBOL(ide_xfer_verbose);
  71
  72 /**
  73  *      ide_dma_speed   -       compute DMA speed
  74  *      @drive: drive
  75  *      @mode; intended mode
  76  *
  77  *      Checks the drive capabilities and returns the speed to use
  78  *      for the transfer. Returns -1 if the requested mode is unknown
  79  *      (eg PIO)
  80  */
  81
  82 u8 ide_dma_speed(ide_drive_t *drive, u8 mode)
  83 {
  84         struct hd_driveid *id   = drive->id;
  85         ide_hwif_t *hwif        = HWIF(drive);
  86         u8 speed = 0;
  87
  88         if (drive->media != ide_disk && hwif->atapi_dma == 0)
  89                 return 0;
  90
  91         switch(mode) {
  92                 case 0x04:
  93                         if ((id->dma_ultra & 0x0040) &&
  94                             (id->dma_ultra & hwif->ultra_mask))
  95                                 { speed = XFER_UDMA_6; break; }
  96                 case 0x03:
  97                         if ((id->dma_ultra & 0x0020) &&
  98                             (id->dma_ultra & hwif->ultra_mask))
  99                                 { speed = XFER_UDMA_5; break; }
 100                 case 0x02:
 101                         if ((id->dma_ultra & 0x0010) &&
 102                             (id->dma_ultra & hwif->ultra_mask))
 103                                 { speed = XFER_UDMA_4; break; }
 104                         if ((id->dma_ultra & 0x0008) &&
 105                             (id->dma_ultra & hwif->ultra_mask))
 106                                 { speed = XFER_UDMA_3; break; }
 107                 case 0x01:
 108                         if ((id->dma_ultra & 0x0004) &&
 109                             (id->dma_ultra & hwif->ultra_mask))
 110                                 { speed = XFER_UDMA_2; break; }
 111                         if ((id->dma_ultra & 0x0002) &&
 112                             (id->dma_ultra & hwif->ultra_mask))
 113                                 { speed = XFER_UDMA_1; break; }
 114                         if ((id->dma_ultra & 0x0001) &&
 115                             (id->dma_ultra & hwif->ultra_mask))
 116                                 { speed = XFER_UDMA_0; break; }
 117                 case 0x00:
 118                         if ((id->dma_mword & 0x0004) &&
 119                             (id->dma_mword & hwif->mwdma_mask))
 120                                 { speed = XFER_MW_DMA_2; break; }
 121                         if ((id->dma_mword & 0x0002) &&
 122                             (id->dma_mword & hwif->mwdma_mask))
 123                                 { speed = XFER_MW_DMA_1; break; }
 124                         if ((id->dma_mword & 0x0001) &&
 125                             (id->dma_mword & hwif->mwdma_mask))
 126                                 { speed = XFER_MW_DMA_0; break; }
 127                         if ((id->dma_1word & 0x0004) &&
 128                             (id->dma_1word & hwif->swdma_mask))
 129                                 { speed = XFER_SW_DMA_2; break; }
 130                         if ((id->dma_1word & 0x0002) &&
 131                             (id->dma_1word & hwif->swdma_mask))
 132                                 { speed = XFER_SW_DMA_1; break; }
 133                         if ((id->dma_1word & 0x0001) &&
 134                             (id->dma_1word & hwif->swdma_mask))
 135                                 { speed = XFER_SW_DMA_0; break; }
 136         }
 137
 138 //      printk("%s: %s: mode 0x%02x, speed 0x%02x\n",
 139 //              __FUNCTION__, drive->name, mode, speed);
 140
 141         return speed;
 142 }
 143
 144 EXPORT_SYMBOL(ide_dma_speed);
 145
 146
 147 /**
 148  *      ide_rate_filter         -       return best speed for mode
 149  *      @mode: modes available
 150  *      @speed: desired speed
 151  *
 152  *      Given the available DMA/UDMA mode this function returns
 153  *      the best available speed at or below the speed requested.
 154  */
 155
 156 u8 ide_rate_filter (u8 mode, u8 speed)
 157 {
 158 #ifdef CONFIG_BLK_DEV_IDEDMA
 159         static u8 speed_max[] = {
 160                 XFER_MW_DMA_2, XFER_UDMA_2, XFER_UDMA_4,
 161                 XFER_UDMA_5, XFER_UDMA_6
 162         };
 163
 164 //      printk("%s: mode 0x%02x, speed 0x%02x\n", __FUNCTION__, mode, speed);
 165
 166         /* So that we remember to update this if new modes appear */
 167         if (mode > 4)
 168                 BUG();
 169         return min(speed, speed_max[mode]);
 170 #else /* !CONFIG_BLK_DEV_IDEDMA */
 171         return min(speed, (u8)XFER_PIO_4);
 172 #endif /* CONFIG_BLK_DEV_IDEDMA */
 173 }
 174
 175 EXPORT_SYMBOL(ide_rate_filter);
 176
 177 int ide_dma_enable (ide_drive_t *drive)
 178 {
 179         ide_hwif_t *hwif        = HWIF(drive);
 180         struct hd_driveid *id   = drive->id;
 181
 182         return ((int)   ((((id->dma_ultra >> 8) & hwif->ultra_mask) ||
 183                           ((id->dma_mword >> 8) & hwif->mwdma_mask) ||
 184                           ((id->dma_1word >> 8) & hwif->swdma_mask)) ? 1 : 0));
 185 }
 186
 187 EXPORT_SYMBOL(ide_dma_enable);
 188
 189 /*
 190  * Standard (generic) timings for PIO modes, from ATA2 specification.
 191  * These timings are for access to the IDE data port register *only*.
 192  * Some drives may specify a mode, while also specifying a different
 193  * value for cycle_time (from drive identification data).
 194  */
 195 const ide_pio_timings_t ide_pio_timings[6] = {
 196         { 70,   165,    600 },  /* PIO Mode 0 */
 197         { 50,   125,    383 },  /* PIO Mode 1 */
 198         { 30,   100,    240 },  /* PIO Mode 2 */
 199         { 30,   80,     180 },  /* PIO Mode 3 with IORDY */
 200         { 25,   70,     120 },  /* PIO Mode 4 with IORDY */
 201         { 20,   50,     100 }   /* PIO Mode 5 with IORDY (nonstandard) */
 202 };
 203
 204 EXPORT_SYMBOL_GPL(ide_pio_timings);
 205
 206 /*
 207  * Shared data/functions for determining best PIO mode for an IDE drive.
 208  * Most of this stuff originally lived in cmd640.c, and changes to the
 209  * ide_pio_blacklist[] table should be made with EXTREME CAUTION to avoid
 210  * breaking the fragile cmd640.c support.
 211  */
 212
 213 /*
 214  * Black list. Some drives incorrectly report their maximal PIO mode,
 215  * at least in respect to CMD640. Here we keep info on some known drives.
 216  */
 217 static struct ide_pio_info {
 218         const char      *name;
 219         int             pio;
 220 } ide_pio_blacklist [] = {
 221 /*      { "Conner Peripherals 1275MB - CFS1275A", 4 }, */
 222         { "Conner Peripherals 540MB - CFS540A", 3 },
 223
 224         { "WDC AC2700",  3 },
 225         { "WDC AC2540",  3 },
 226         { "WDC AC2420",  3 },
 227         { "WDC AC2340",  3 },
 228         { "WDC AC2250",  0 },
 229         { "WDC AC2200",  0 },
 230         { "WDC AC21200", 4 },
 231         { "WDC AC2120",  0 },
 232         { "WDC AC2850",  3 },
 233         { "WDC AC1270",  3 },
 234         { "WDC AC1170",  1 },
 235         { "WDC AC1210",  1 },
 236         { "WDC AC280",   0 },
 237 /*      { "WDC AC21000", 4 }, */
 238         { "WDC AC31000", 3 },
 239         { "WDC AC31200", 3 },
 240 /*      { "WDC AC31600", 4 }, */
 241
 242         { "Maxtor 7131 AT", 1 },
 243         { "Maxtor 7171 AT", 1 },
 244         { "Maxtor 7213 AT", 1 },
 245         { "Maxtor 7245 AT", 1 },
 246         { "Maxtor 7345 AT", 1 },
 247         { "Maxtor 7546 AT", 3 },
 248         { "Maxtor 7540 AV", 3 },
 249
 250         { "SAMSUNG SHD-3121A", 1 },
 251         { "SAMSUNG SHD-3122A", 1 },
 252         { "SAMSUNG SHD-3172A", 1 },
 253
 254 /*      { "ST51080A", 4 },
 255  *      { "ST51270A", 4 },
 256  *      { "ST31220A", 4 },
 257  *      { "ST31640A", 4 },
 258  *      { "ST32140A", 4 },
 259  *      { "ST3780A",  4 },
 260  */
 261         { "ST5660A",  3 },
 262         { "ST3660A",  3 },
 263         { "ST3630A",  3 },
 264         { "ST3655A",  3 },
 265         { "ST3391A",  3 },
 266         { "ST3390A",  1 },
 267         { "ST3600A",  1 },
 268         { "ST3290A",  0 },
 269         { "ST3144A",  0 },
 270         { "ST3491A",  1 },      /* reports 3, should be 1 or 2 (depending on */
 271                                 /* drive) according to Seagates FIND-ATA program */
 272
 273         { "QUANTUM ELS127A", 0 },
 274         { "QUANTUM ELS170A", 0 },
 275         { "QUANTUM LPS240A", 0 },
 276         { "QUANTUM LPS210A", 3 },
 277         { "QUANTUM LPS270A", 3 },
 278         { "QUANTUM LPS365A", 3 },
 279         { "QUANTUM LPS540A", 3 },
 280         { "QUANTUM LIGHTNING 540A", 3 },
 281         { "QUANTUM LIGHTNING 730A", 3 },
 282
 283         { "QUANTUM FIREBALL_540", 3 }, /* Older Quantum Fireballs don't work */
 284         { "QUANTUM FIREBALL_640", 3 },
 285         { "QUANTUM FIREBALL_1080", 3 },
 286         { "QUANTUM FIREBALL_1280", 3 },
 287         { NULL, 0 }
 288 };
 289
 290 /**
 291  *      ide_scan_pio_blacklist  -       check for a blacklisted drive
 292  *      @model: Drive model string
 293  *
 294  *      This routine searches the ide_pio_blacklist for an entry
 295  *      matching the start/whole of the supplied model name.
 296  *
 297  *      Returns -1 if no match found.
 298  *      Otherwise returns the recommended PIO mode from ide_pio_blacklist[].
 299  */
 300
 301 static int ide_scan_pio_blacklist (char *model)
 302 {
 303         struct ide_pio_info *p;
 304
 305         for (p = ide_pio_blacklist; p->name != NULL; p++) {
 306                 if (strncmp(p->name, model, strlen(p->name)) == 0)
 307                         return p->pio;
 308         }
 309         return -1;
 310 }
 311
 312 /**
 313  *      ide_get_best_pio_mode   -       get PIO mode from drive
 314  *      @driver: drive to consider
 315  *      @mode_wanted: preferred mode
 316  *      @max_mode: highest allowed
 317  *      @d: pio data
 318  *
 319  *      This routine returns the recommended PIO settings for a given drive,
 320  *      based on the drive->id information and the ide_pio_blacklist[].
 321  *      This is used by most chipset support modules when "auto-tuning".
 322  *
 323  *      Drive PIO mode auto selection
 324  */
 325
 326 u8 ide_get_best_pio_mode (ide_drive_t *drive, u8 mode_wanted, u8 max_mode, ide_pio_data_t *d)
 327 {
 328         int pio_mode;
 329         int cycle_time = 0;
 330         int use_iordy = 0;
 331         struct hd_driveid* id = drive->id;
 332         int overridden  = 0;
 333         int blacklisted = 0;
 334
 335         if (mode_wanted != 255) {
 336                 pio_mode = mode_wanted;
 337         } else if (!drive->id) {
 338                 pio_mode = 0;
 339         } else if ((pio_mode = ide_scan_pio_blacklist(id->model)) != -1) {
 340                 overridden = 1;
 341                 blacklisted = 1;
 342                 use_iordy = (pio_mode > 2);
 343         } else {
 344                 pio_mode = id->tPIO;
 345                 if (pio_mode > 2) {     /* 2 is maximum allowed tPIO value */
 346                         pio_mode = 2;
 347                         overridden = 1;
 348                 }
 349                 if (id->field_valid & 2) {        /* drive implements ATA2? */
 350                         if (id->capability & 8) { /* drive supports use_iordy? */
 351                                 use_iordy = 1;
 352                                 cycle_time = id->eide_pio_iordy;
 353                                 if (id->eide_pio_modes & 7) {
 354                                         overridden = 0;
 355                                         if (id->eide_pio_modes & 4)
 356                                                 pio_mode = 5;
 357                                         else if (id->eide_pio_modes & 2)
 358                                                 pio_mode = 4;
 359                                         else
 360                                                 pio_mode = 3;
 361                                 }
 362                         } else {
 363                                 cycle_time = id->eide_pio;
 364                         }
 365                 }
 366
 367 #if 0
 368                 if (drive->id->major_rev_num & 0x0004) printk("ATA-2 ");
 369 #endif
 370
 371                 /*
 372                  * Conservative "downgrade" for all pre-ATA2 drives
 373                  */
 374                 if (pio_mode && pio_mode < 4) {
 375                         pio_mode--;
 376                         overridden = 1;
 377 #if 0
 378                         use_iordy = (pio_mode > 2);
 379 #endif
 380                         if (cycle_time && cycle_time < ide_pio_timings[pio_mode].cycle_time)
 381                                 cycle_time = 0; /* use standard timing */
 382                 }
 383         }
 384         if (pio_mode > max_mode) {
 385                 pio_mode = max_mode;
 386                 cycle_time = 0;
 387         }
 388         if (d) {
 389                 d->pio_mode = pio_mode;
 390                 d->cycle_time = cycle_time ? cycle_time : ide_pio_timings[pio_mode].cycle_time;
 391                 d->use_iordy = use_iordy;
 392                 d->overridden = overridden;
 393                 d->blacklisted = blacklisted;
 394         }
 395         return pio_mode;
 396 }
 397
 398 EXPORT_SYMBOL_GPL(ide_get_best_pio_mode);
 399
 400 /**
 401  *      ide_toggle_bounce       -       handle bounce buffering
 402  *      @drive: drive to update
 403  *      @on: on/off boolean
 404  *
 405  *      Enable or disable bounce buffering for the device. Drives move
 406  *      between PIO and DMA and that changes the rules we need.
 407  */
 408
 409 void ide_toggle_bounce(ide_drive_t *drive, int on)
 410 {
 411         u64 addr = BLK_BOUNCE_HIGH;     /* dma64_addr_t */
 412
 413         if (on && drive->media == ide_disk) {
 414                 if (!PCI_DMA_BUS_IS_PHYS)
 415                         addr = BLK_BOUNCE_ANY;
 416                 else if (HWIF(drive)->pci_dev)
 417                         addr = HWIF(drive)->pci_dev->dma_mask;
 418         }
 419
 420         if (drive->queue)
 421                 blk_queue_bounce_limit(drive->queue, addr);
 422 }
 423
 424 /**
 425  *      ide_set_xfer_rate       -       set transfer rate
 426  *      @drive: drive to set
 427  *      @speed: speed to attempt to set
 428  *
 429  *      General helper for setting the speed of an IDE device. This
 430  *      function knows about user enforced limits from the configuration
 431  *      which speedproc() does not.  High level drivers should never
 432  *      invoke speedproc() directly.
 433  */
 434
 435 int ide_set_xfer_rate(ide_drive_t *drive, u8 rate)
 436 {
 437 #ifndef CONFIG_BLK_DEV_IDEDMA
 438         rate = min(rate, (u8) XFER_PIO_4);
 439 #endif
 440         if(HWIF(drive)->speedproc)
 441                 return HWIF(drive)->speedproc(drive, rate);
 442         else
 443                 return -1;
 444 }
 445
 446 EXPORT_SYMBOL_GPL(ide_set_xfer_rate);
 447
 448 static void ide_dump_opcode(ide_drive_t *drive)
 449 {
 450         struct request *rq;
 451         u8 opcode = 0;
 452         int found = 0;
 453
 454         spin_lock(&ide_lock);
 455         rq = NULL;
 456         if (HWGROUP(drive))
 457                 rq = HWGROUP(drive)->rq;
 458         spin_unlock(&ide_lock);
 459         if (!rq)
 460                 return;
 461         if (rq->flags & (REQ_DRIVE_CMD | REQ_DRIVE_TASK)) {
 462                 char *args = rq->buffer;
 463                 if (args) {
 464                         opcode = args[0];
 465                         found = 1;
 466                 }
 467         } else if (rq->flags & REQ_DRIVE_TASKFILE) {
 468                 ide_task_t *args = rq->special;
 469                 if (args) {
 470                         task_struct_t *tf = (task_struct_t *) args->tfRegister;
 471                         opcode = tf->command;
 472                         found = 1;
 473                 }
 474         }
 475
 476         printk("ide: failed opcode was: ");
 477         if (!found)
 478                 printk("unknown\n");
 479         else
 480                 printk("0x%02x\n", opcode);
 481 }
 482
 483 static u8 ide_dump_ata_status(ide_drive_t *drive, const char *msg, u8 stat)
 484 {
 485         ide_hwif_t *hwif = HWIF(drive);
 486         unsigned long flags;
 487         u8 err = 0;
 488
 489         local_irq_set(flags);
 490         printk("%s: %s: status=0x%02x", drive->name, msg, stat);
 491         printk(" { ");
 492         if (stat & BUSY_STAT)
 493                 printk("Busy ");
 494         else {
 495                 if (stat & READY_STAT)  printk("DriveReady ");
 496                 if (stat & WRERR_STAT)  printk("DeviceFault ");
 497                 if (stat & SEEK_STAT)   printk("SeekComplete ");
 498                 if (stat & DRQ_STAT)    printk("DataRequest ");
 499                 if (stat & ECC_STAT)    printk("CorrectedError ");
 500                 if (stat & INDEX_STAT)  printk("Index ");
 501                 if (stat & ERR_STAT)    printk("Error ");
 502         }
 503         printk("}");
 504         printk("\n");
 505         if ((stat & (BUSY_STAT|ERR_STAT)) == ERR_STAT) {
 506                 err = hwif->INB(IDE_ERROR_REG);
 507                 printk("%s: %s: error=0x%02x", drive->name, msg, err);
 508                 printk(" { ");
 509                 if (err & ABRT_ERR)     printk("DriveStatusError ");
 510                 if (err & ICRC_ERR)
 511                         printk("Bad%s ", (err & ABRT_ERR) ? "CRC" : "Sector");
 512                 if (err & ECC_ERR)      printk("UncorrectableError ");
 513                 if (err & ID_ERR)       printk("SectorIdNotFound ");
 514                 if (err & TRK0_ERR)     printk("TrackZeroNotFound ");
 515                 if (err & MARK_ERR)     printk("AddrMarkNotFound ");
 516                 printk("}");
 517                 if ((err & (BBD_ERR | ABRT_ERR)) == BBD_ERR ||
 518                     (err & (ECC_ERR|ID_ERR|MARK_ERR))) {
 519                         if (drive->addressing == 1) {
 520                                 __u64 sectors = 0;
 521                                 u32 low = 0, high = 0;
 522                                 low = ide_read_24(drive);
 523                                 hwif->OUTB(drive->ctl|0x80, IDE_CONTROL_REG);
 524                                 high = ide_read_24(drive);
 525                                 sectors = ((__u64)high << 24) | low;
 526                                 printk(", LBAsect=%llu, high=%d, low=%d",
 527                                        (unsigned long long) sectors,
 528                                        high, low);
 529                         } else {
 530                                 u8 cur = hwif->INB(IDE_SELECT_REG);
 531                                 if (cur & 0x40) {       /* using LBA? */
 532                                         printk(", LBAsect=%ld", (unsigned long)
 533                                          ((cur&0xf)<<24)
 534                                          |(hwif->INB(IDE_HCYL_REG)<<16)
 535                                          |(hwif->INB(IDE_LCYL_REG)<<8)
 536                                          | hwif->INB(IDE_SECTOR_REG));
 537                                 } else {
 538                                         printk(", CHS=%d/%d/%d",
 539                                          (hwif->INB(IDE_HCYL_REG)<<8) +
 540                                           hwif->INB(IDE_LCYL_REG),
 541                                           cur & 0xf,
 542                                           hwif->INB(IDE_SECTOR_REG));
 543                                 }
 544                         }
 545                         if (HWGROUP(drive) && HWGROUP(drive)->rq)
 546                                 printk(", sector=%llu",
 547                                         (unsigned long long)HWGROUP(drive)->rq->sector);
 548                 }
 549         }
 550         printk("\n");
 551         ide_dump_opcode(drive);
 552         local_irq_restore(flags);
 553         return err;
 554 }
 555
 556 /**
 557  *      ide_dump_atapi_status       -       print human readable atapi status
 558  *      @drive: drive that status applies to
 559  *      @msg: text message to print
 560  *      @stat: status byte to decode
 561  *
 562  *      Error reporting, in human readable form (luxurious, but a memory hog).
 563  */
 564
 565 static u8 ide_dump_atapi_status(ide_drive_t *drive, const char *msg, u8 stat)
 566 {
 567         unsigned long flags;
 568
 569         atapi_status_t status;
 570         atapi_error_t error;
 571
 572         status.all = stat;
 573         error.all = 0;
 574         local_irq_set(flags);
 575         printk("%s: %s: status=0x%02x { ", drive->name, msg, stat);
 576         if (status.b.bsy)
 577                 printk("Busy ");
 578         else {
 579                 if (status.b.drdy)      printk("DriveReady ");
 580                 if (status.b.df)        printk("DeviceFault ");
 581                 if (status.b.dsc)       printk("SeekComplete ");
 582                 if (status.b.drq)       printk("DataRequest ");
 583                 if (status.b.corr)      printk("CorrectedError ");
 584                 if (status.b.idx)       printk("Index ");
 585                 if (status.b.check)     printk("Error ");
 586         }
 587         printk("}\n");
 588         if (status.b.check && !status.b.bsy) {
 589                 error.all = HWIF(drive)->INB(IDE_ERROR_REG);
 590                 printk("%s: %s: error=0x%02x { ", drive->name, msg, error.all);
 591                 if (error.b.ili)        printk("IllegalLengthIndication ");
 592                 if (error.b.eom)        printk("EndOfMedia ");
 593                 if (error.b.abrt)       printk("AbortedCommand ");
 594                 if (error.b.mcr)        printk("MediaChangeRequested ");
 595                 if (error.b.sense_key)  printk("LastFailedSense=0x%02x ",
 596                                                 error.b.sense_key);
 597                 printk("}\n");
 598         }
 599         ide_dump_opcode(drive);
 600         local_irq_restore(flags);
 601         return error.all;
 602 }
 603
 604 /**
 605  *      ide_dump_status         -       translate ATA/ATAPI error
 606  *      @drive: drive the error occured on
 607  *      @msg: information string
 608  *      @stat: status byte
 609  *
 610  *      Error reporting, in human readable form (luxurious, but a memory hog).
 611  *      Combines the drive name, message and status byte to provide a
 612  *      user understandable explanation of the device error.
 613  */
 614
 615 u8 ide_dump_status(ide_drive_t *drive, const char *msg, u8 stat)
 616 {
 617         if (drive->media == ide_disk)
 618                 return ide_dump_ata_status(drive, msg, stat);
 619         return ide_dump_atapi_status(drive, msg, stat);
 620 }
 621
 622 EXPORT_SYMBOL(ide_dump_status);