drivers/ide/ide-lib.c

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