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:  modes available
  75  *
  76  *      Checks the drive capabilities and returns the speed to use
  77  *      for the DMA transfer.  Returns 0 if the drive is incapable
  78  *      of DMA transfers.
  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 ultra_mask, mwdma_mask, swdma_mask;
  86         u8 speed = 0;
  87
  88         if (drive->media != ide_disk && hwif->atapi_dma == 0)
  89                 return 0;
  90
  91         /* Capable of UltraDMA modes? */
  92         ultra_mask = id->dma_ultra & hwif->ultra_mask;
  93
  94         if (!(id->field_valid & 4))
  95                 mode = 0;       /* fallback to MW/SW DMA if no UltraDMA */
  96
  97         switch (mode) {
  98         case 4:
  99                 if (ultra_mask & 0x40) {
 100                         speed = XFER_UDMA_6;
 101                         break;
 102                 }
 103         case 3:
 104                 if (ultra_mask & 0x20) {
 105                         speed = XFER_UDMA_5;
 106                         break;
 107                 }
 108         case 2:
 109                 if (ultra_mask & 0x10) {
 110                         speed = XFER_UDMA_4;
 111                         break;
 112                 }
 113                 if (ultra_mask & 0x08) {
 114                         speed = XFER_UDMA_3;
 115                         break;
 116                 }
 117         case 1:
 118                 if (ultra_mask & 0x04) {
 119                         speed = XFER_UDMA_2;
 120                         break;
 121                 }
 122                 if (ultra_mask & 0x02) {
 123                         speed = XFER_UDMA_1;
 124                         break;
 125                 }
 126                 if (ultra_mask & 0x01) {
 127                         speed = XFER_UDMA_0;
 128                         break;
 129                 }
 130         case 0:
 131                 mwdma_mask = id->dma_mword & hwif->mwdma_mask;
 132
 133                 if (mwdma_mask & 0x04) {
 134                         speed = XFER_MW_DMA_2;
 135                         break;
 136                 }
 137                 if (mwdma_mask & 0x02) {
 138                         speed = XFER_MW_DMA_1;
 139                         break;
 140                 }
 141                 if (mwdma_mask & 0x01) {
 142                         speed = XFER_MW_DMA_0;
 143                         break;
 144                 }
 145
 146                 swdma_mask = id->dma_1word & hwif->swdma_mask;
 147
 148                 if (swdma_mask & 0x04) {
 149                         speed = XFER_SW_DMA_2;
 150                         break;
 151                 }
 152                 if (swdma_mask & 0x02) {
 153                         speed = XFER_SW_DMA_1;
 154                         break;
 155                 }
 156                 if (swdma_mask & 0x01) {
 157                         speed = XFER_SW_DMA_0;
 158                         break;
 159                 }
 160         }
 161
 162         return speed;
 163 }
 164 EXPORT_SYMBOL(ide_dma_speed);
 165
 166
 167 /**
 168  *      ide_rate_filter         -       return best speed for mode
 169  *      @mode: modes available
 170  *      @speed: desired speed
 171  *
 172  *      Given the available DMA/UDMA mode this function returns
 173  *      the best available speed at or below the speed requested.
 174  */
 175
 176 u8 ide_rate_filter (u8 mode, u8 speed)
 177 {
 178 #ifdef CONFIG_BLK_DEV_IDEDMA
 179         static u8 speed_max[] = {
 180                 XFER_MW_DMA_2, XFER_UDMA_2, XFER_UDMA_4,
 181                 XFER_UDMA_5, XFER_UDMA_6
 182         };
 183
 184 //      printk("%s: mode 0x%02x, speed 0x%02x\n", __FUNCTION__, mode, speed);
 185
 186         /* So that we remember to update this if new modes appear */
 187         BUG_ON(mode > 4);
 188         return min(speed, speed_max[mode]);
 189 #else /* !CONFIG_BLK_DEV_IDEDMA */
 190         return min(speed, (u8)XFER_PIO_4);
 191 #endif /* CONFIG_BLK_DEV_IDEDMA */
 192 }
 193
 194 EXPORT_SYMBOL(ide_rate_filter);
 195
 196 int ide_dma_enable (ide_drive_t *drive)
 197 {
 198         ide_hwif_t *hwif        = HWIF(drive);
 199         struct hd_driveid *id   = drive->id;
 200
 201         return ((int)   ((((id->dma_ultra >> 8) & hwif->ultra_mask) ||
 202                           ((id->dma_mword >> 8) & hwif->mwdma_mask) ||
 203                           ((id->dma_1word >> 8) & hwif->swdma_mask)) ? 1 : 0));
 204 }
 205
 206 EXPORT_SYMBOL(ide_dma_enable);
 207
 208 /*
 209  * Standard (generic) timings for PIO modes, from ATA2 specification.
 210  * These timings are for access to the IDE data port register *only*.
 211  * Some drives may specify a mode, while also specifying a different
 212  * value for cycle_time (from drive identification data).
 213  */
 214 const ide_pio_timings_t ide_pio_timings[6] = {
 215         { 70,   165,    600 },  /* PIO Mode 0 */
 216         { 50,   125,    383 },  /* PIO Mode 1 */
 217         { 30,   100,    240 },  /* PIO Mode 2 */
 218         { 30,   80,     180 },  /* PIO Mode 3 with IORDY */
 219         { 25,   70,     120 },  /* PIO Mode 4 with IORDY */
 220         { 20,   50,     100 }   /* PIO Mode 5 with IORDY (nonstandard) */
 221 };
 222
 223 EXPORT_SYMBOL_GPL(ide_pio_timings);
 224
 225 /*
 226  * Shared data/functions for determining best PIO mode for an IDE drive.
 227  * Most of this stuff originally lived in cmd640.c, and changes to the
 228  * ide_pio_blacklist[] table should be made with EXTREME CAUTION to avoid
 229  * breaking the fragile cmd640.c support.
 230  */
 231
 232 /*
 233  * Black list. Some drives incorrectly report their maximal PIO mode,
 234  * at least in respect to CMD640. Here we keep info on some known drives.
 235  */
 236 static struct ide_pio_info {
 237         const char      *name;
 238         int             pio;
 239 } ide_pio_blacklist [] = {
 240 /*      { "Conner Peripherals 1275MB - CFS1275A", 4 }, */
 241         { "Conner Peripherals 540MB - CFS540A", 3 },
 242
 243         { "WDC AC2700",  3 },
 244         { "WDC AC2540",  3 },
 245         { "WDC AC2420",  3 },
 246         { "WDC AC2340",  3 },
 247         { "WDC AC2250",  0 },
 248         { "WDC AC2200",  0 },
 249         { "WDC AC21200", 4 },
 250         { "WDC AC2120",  0 },
 251         { "WDC AC2850",  3 },
 252         { "WDC AC1270",  3 },
 253         { "WDC AC1170",  1 },
 254         { "WDC AC1210",  1 },
 255         { "WDC AC280",   0 },
 256 /*      { "WDC AC21000", 4 }, */
 257         { "WDC AC31000", 3 },
 258         { "WDC AC31200", 3 },
 259 /*      { "WDC AC31600", 4 }, */
 260
 261         { "Maxtor 7131 AT", 1 },
 262         { "Maxtor 7171 AT", 1 },
 263         { "Maxtor 7213 AT", 1 },
 264         { "Maxtor 7245 AT", 1 },
 265         { "Maxtor 7345 AT", 1 },
 266         { "Maxtor 7546 AT", 3 },
 267         { "Maxtor 7540 AV", 3 },
 268
 269         { "SAMSUNG SHD-3121A", 1 },
 270         { "SAMSUNG SHD-3122A", 1 },
 271         { "SAMSUNG SHD-3172A", 1 },
 272
 273 /*      { "ST51080A", 4 },
 274  *      { "ST51270A", 4 },
 275  *      { "ST31220A", 4 },
 276  *      { "ST31640A", 4 },
 277  *      { "ST32140A", 4 },
 278  *      { "ST3780A",  4 },
 279  */
 280         { "ST5660A",  3 },
 281         { "ST3660A",  3 },
 282         { "ST3630A",  3 },
 283         { "ST3655A",  3 },
 284         { "ST3391A",  3 },
 285         { "ST3390A",  1 },
 286         { "ST3600A",  1 },
 287         { "ST3290A",  0 },
 288         { "ST3144A",  0 },
 289         { "ST3491A",  1 },      /* reports 3, should be 1 or 2 (depending on */
 290                                 /* drive) according to Seagates FIND-ATA program */
 291
 292         { "QUANTUM ELS127A", 0 },
 293         { "QUANTUM ELS170A", 0 },
 294         { "QUANTUM LPS240A", 0 },
 295         { "QUANTUM LPS210A", 3 },
 296         { "QUANTUM LPS270A", 3 },
 297         { "QUANTUM LPS365A", 3 },
 298         { "QUANTUM LPS540A", 3 },
 299         { "QUANTUM LIGHTNING 540A", 3 },
 300         { "QUANTUM LIGHTNING 730A", 3 },
 301
 302         { "QUANTUM FIREBALL_540", 3 }, /* Older Quantum Fireballs don't work */
 303         { "QUANTUM FIREBALL_640", 3 },
 304         { "QUANTUM FIREBALL_1080", 3 },
 305         { "QUANTUM FIREBALL_1280", 3 },
 306         { NULL, 0 }
 307 };
 308
 309 /**
 310  *      ide_scan_pio_blacklist  -       check for a blacklisted drive
 311  *      @model: Drive model string
 312  *
 313  *      This routine searches the ide_pio_blacklist for an entry
 314  *      matching the start/whole of the supplied model name.
 315  *
 316  *      Returns -1 if no match found.
 317  *      Otherwise returns the recommended PIO mode from ide_pio_blacklist[].
 318  */
 319
 320 static int ide_scan_pio_blacklist (char *model)
 321 {
 322         struct ide_pio_info *p;
 323
 324         for (p = ide_pio_blacklist; p->name != NULL; p++) {
 325                 if (strncmp(p->name, model, strlen(p->name)) == 0)
 326                         return p->pio;
 327         }
 328         return -1;
 329 }
 330
 331 /**
 332  *      ide_get_best_pio_mode   -       get PIO mode from drive
 333  *      @driver: drive to consider
 334  *      @mode_wanted: preferred mode
 335  *      @max_mode: highest allowed
 336  *      @d: pio data
 337  *
 338  *      This routine returns the recommended PIO settings for a given drive,
 339  *      based on the drive->id information and the ide_pio_blacklist[].
 340  *      This is used by most chipset support modules when "auto-tuning".
 341  *
 342  *      Drive PIO mode auto selection
 343  */
 344
 345 u8 ide_get_best_pio_mode (ide_drive_t *drive, u8 mode_wanted, u8 max_mode, ide_pio_data_t *d)
 346 {
 347         int pio_mode;
 348         int cycle_time = 0;
 349         int use_iordy = 0;
 350         struct hd_driveid* id = drive->id;
 351         int overridden  = 0;
 352         int blacklisted = 0;
 353
 354         if (mode_wanted != 255) {
 355                 pio_mode = mode_wanted;
 356         } else if (!drive->id) {
 357                 pio_mode = 0;
 358         } else if ((pio_mode = ide_scan_pio_blacklist(id->model)) != -1) {
 359                 overridden = 1;
 360                 blacklisted = 1;
 361                 use_iordy = (pio_mode > 2);
 362         } else {
 363                 pio_mode = id->tPIO;
 364                 if (pio_mode > 2) {     /* 2 is maximum allowed tPIO value */
 365                         pio_mode = 2;
 366                         overridden = 1;
 367                 }
 368                 if (id->field_valid & 2) {        /* drive implements ATA2? */
 369                         if (id->capability & 8) { /* drive supports use_iordy? */
 370                                 use_iordy = 1;
 371                                 cycle_time = id->eide_pio_iordy;
 372                                 if (id->eide_pio_modes & 7) {
 373                                         overridden = 0;
 374                                         if (id->eide_pio_modes & 4)
 375                                                 pio_mode = 5;
 376                                         else if (id->eide_pio_modes & 2)
 377                                                 pio_mode = 4;
 378                                         else
 379                                                 pio_mode = 3;
 380                                 }
 381                         } else {
 382                                 cycle_time = id->eide_pio;
 383                         }
 384                 }
 385
 386 #if 0
 387                 if (drive->id->major_rev_num & 0x0004) printk("ATA-2 ");
 388 #endif
 389
 390                 /*
 391                  * Conservative "downgrade" for all pre-ATA2 drives
 392                  */
 393                 if (pio_mode && pio_mode < 4) {
 394                         pio_mode--;
 395                         overridden = 1;
 396 #if 0
 397                         use_iordy = (pio_mode > 2);
 398 #endif
 399                         if (cycle_time && cycle_time < ide_pio_timings[pio_mode].cycle_time)
 400                                 cycle_time = 0; /* use standard timing */
 401                 }
 402         }
 403         if (pio_mode > max_mode) {
 404                 pio_mode = max_mode;
 405                 cycle_time = 0;
 406         }
 407         if (d) {
 408                 d->pio_mode = pio_mode;
 409                 d->cycle_time = cycle_time ? cycle_time : ide_pio_timings[pio_mode].cycle_time;
 410                 d->use_iordy = use_iordy;
 411                 d->overridden = overridden;
 412                 d->blacklisted = blacklisted;
 413         }
 414         return pio_mode;
 415 }
 416
 417 EXPORT_SYMBOL_GPL(ide_get_best_pio_mode);
 418
 419 /**
 420  *      ide_toggle_bounce       -       handle bounce buffering
 421  *      @drive: drive to update
 422  *      @on: on/off boolean
 423  *
 424  *      Enable or disable bounce buffering for the device. Drives move
 425  *      between PIO and DMA and that changes the rules we need.
 426  */
 427
 428 void ide_toggle_bounce(ide_drive_t *drive, int on)
 429 {
 430         u64 addr = BLK_BOUNCE_HIGH;     /* dma64_addr_t */
 431
 432         if (!PCI_DMA_BUS_IS_PHYS) {
 433                 addr = BLK_BOUNCE_ANY;
 434         } else if (on && drive->media == ide_disk) {
 435                 if (HWIF(drive)->pci_dev)
 436                         addr = HWIF(drive)->pci_dev->dma_mask;
 437         }
 438
 439         if (drive->queue)
 440                 blk_queue_bounce_limit(drive->queue, addr);
 441 }
 442
 443 /**
 444  *      ide_set_xfer_rate       -       set transfer rate
 445  *      @drive: drive to set
 446  *      @speed: speed to attempt to set
 447  *
 448  *      General helper for setting the speed of an IDE device. This
 449  *      function knows about user enforced limits from the configuration
 450  *      which speedproc() does not.  High level drivers should never
 451  *      invoke speedproc() directly.
 452  */
 453
 454 int ide_set_xfer_rate(ide_drive_t *drive, u8 rate)
 455 {
 456 #ifndef CONFIG_BLK_DEV_IDEDMA
 457         rate = min(rate, (u8) XFER_PIO_4);
 458 #endif
 459         if(HWIF(drive)->speedproc)
 460                 return HWIF(drive)->speedproc(drive, rate);
 461         else
 462                 return -1;
 463 }
 464
 465 EXPORT_SYMBOL_GPL(ide_set_xfer_rate);
 466
 467 static void ide_dump_opcode(ide_drive_t *drive)
 468 {
 469         struct request *rq;
 470         u8 opcode = 0;
 471         int found = 0;
 472
 473         spin_lock(&ide_lock);
 474         rq = NULL;
 475         if (HWGROUP(drive))
 476                 rq = HWGROUP(drive)->rq;
 477         spin_unlock(&ide_lock);
 478         if (!rq)
 479                 return;
 480         if (rq->cmd_type == REQ_TYPE_ATA_CMD ||
 481             rq->cmd_type == REQ_TYPE_ATA_TASK) {
 482                 char *args = rq->buffer;
 483                 if (args) {
 484                         opcode = args[0];
 485                         found = 1;
 486                 }
 487         } else if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
 488                 ide_task_t *args = rq->special;
 489                 if (args) {
 490                         task_struct_t *tf = (task_struct_t *) args->tfRegister;
 491                         opcode = tf->command;
 492                         found = 1;
 493                 }
 494         }
 495
 496         printk("ide: failed opcode was: ");
 497         if (!found)
 498                 printk("unknown\n");
 499         else
 500                 printk("0x%02x\n", opcode);
 501 }
 502
 503 static u8 ide_dump_ata_status(ide_drive_t *drive, const char *msg, u8 stat)
 504 {
 505         ide_hwif_t *hwif = HWIF(drive);
 506         unsigned long flags;
 507         u8 err = 0;
 508
 509         local_irq_save(flags);
 510         printk("%s: %s: status=0x%02x { ", drive->name, msg, stat);
 511         if (stat & BUSY_STAT)
 512                 printk("Busy ");
 513         else {
 514                 if (stat & READY_STAT)  printk("DriveReady ");
 515                 if (stat & WRERR_STAT)  printk("DeviceFault ");
 516                 if (stat & SEEK_STAT)   printk("SeekComplete ");
 517                 if (stat & DRQ_STAT)    printk("DataRequest ");
 518                 if (stat & ECC_STAT)    printk("CorrectedError ");
 519                 if (stat & INDEX_STAT)  printk("Index ");
 520                 if (stat & ERR_STAT)    printk("Error ");
 521         }
 522         printk("}\n");
 523         if ((stat & (BUSY_STAT|ERR_STAT)) == ERR_STAT) {
 524                 err = hwif->INB(IDE_ERROR_REG);
 525                 printk("%s: %s: error=0x%02x { ", drive->name, msg, err);
 526                 if (err & ABRT_ERR)     printk("DriveStatusError ");
 527                 if (err & ICRC_ERR)
 528                         printk((err & ABRT_ERR) ? "BadCRC " : "BadSector ");
 529                 if (err & ECC_ERR)      printk("UncorrectableError ");
 530                 if (err & ID_ERR)       printk("SectorIdNotFound ");
 531                 if (err & TRK0_ERR)     printk("TrackZeroNotFound ");
 532                 if (err & MARK_ERR)     printk("AddrMarkNotFound ");
 533                 printk("}");
 534                 if ((err & (BBD_ERR | ABRT_ERR)) == BBD_ERR ||
 535                     (err & (ECC_ERR|ID_ERR|MARK_ERR))) {
 536                         if (drive->addressing == 1) {
 537                                 __u64 sectors = 0;
 538                                 u32 low = 0, high = 0;
 539                                 low = ide_read_24(drive);
 540                                 hwif->OUTB(drive->ctl|0x80, IDE_CONTROL_REG);
 541                                 high = ide_read_24(drive);
 542                                 sectors = ((__u64)high << 24) | low;
 543                                 printk(", LBAsect=%llu, high=%d, low=%d",
 544                                        (unsigned long long) sectors,
 545                                        high, low);
 546                         } else {
 547                                 u8 cur = hwif->INB(IDE_SELECT_REG);
 548                                 if (cur & 0x40) {       /* using LBA? */
 549                                         printk(", LBAsect=%ld", (unsigned long)
 550                                          ((cur&0xf)<<24)
 551                                          |(hwif->INB(IDE_HCYL_REG)<<16)
 552                                          |(hwif->INB(IDE_LCYL_REG)<<8)
 553                                          | hwif->INB(IDE_SECTOR_REG));
 554                                 } else {
 555                                         printk(", CHS=%d/%d/%d",
 556                                          (hwif->INB(IDE_HCYL_REG)<<8) +
 557                                           hwif->INB(IDE_LCYL_REG),
 558                                           cur & 0xf,
 559                                           hwif->INB(IDE_SECTOR_REG));
 560                                 }
 561                         }
 562                         if (HWGROUP(drive) && HWGROUP(drive)->rq)
 563                                 printk(", sector=%llu",
 564                                         (unsigned long long)HWGROUP(drive)->rq->sector);
 565                 }
 566                 printk("\n");
 567         }
 568         ide_dump_opcode(drive);
 569         local_irq_restore(flags);
 570         return err;
 571 }
 572
 573 /**
 574  *      ide_dump_atapi_status       -       print human readable atapi status
 575  *      @drive: drive that status applies to
 576  *      @msg: text message to print
 577  *      @stat: status byte to decode
 578  *
 579  *      Error reporting, in human readable form (luxurious, but a memory hog).
 580  */
 581
 582 static u8 ide_dump_atapi_status(ide_drive_t *drive, const char *msg, u8 stat)
 583 {
 584         unsigned long flags;
 585
 586         atapi_status_t status;
 587         atapi_error_t error;
 588
 589         status.all = stat;
 590         error.all = 0;
 591         local_irq_save(flags);
 592         printk("%s: %s: status=0x%02x { ", drive->name, msg, stat);
 593         if (status.b.bsy)
 594                 printk("Busy ");
 595         else {
 596                 if (status.b.drdy)      printk("DriveReady ");
 597                 if (status.b.df)        printk("DeviceFault ");
 598                 if (status.b.dsc)       printk("SeekComplete ");
 599                 if (status.b.drq)       printk("DataRequest ");
 600                 if (status.b.corr)      printk("CorrectedError ");
 601                 if (status.b.idx)       printk("Index ");
 602                 if (status.b.check)     printk("Error ");
 603         }
 604         printk("}\n");
 605         if (status.b.check && !status.b.bsy) {
 606                 error.all = HWIF(drive)->INB(IDE_ERROR_REG);
 607                 printk("%s: %s: error=0x%02x { ", drive->name, msg, error.all);
 608                 if (error.b.ili)        printk("IllegalLengthIndication ");
 609                 if (error.b.eom)        printk("EndOfMedia ");
 610                 if (error.b.abrt)       printk("AbortedCommand ");
 611                 if (error.b.mcr)        printk("MediaChangeRequested ");
 612                 if (error.b.sense_key)  printk("LastFailedSense=0x%02x ",
 613                                                 error.b.sense_key);
 614                 printk("}\n");
 615         }
 616         ide_dump_opcode(drive);
 617         local_irq_restore(flags);
 618         return error.all;
 619 }
 620
 621 /**
 622  *      ide_dump_status         -       translate ATA/ATAPI error
 623  *      @drive: drive the error occured on
 624  *      @msg: information string
 625  *      @stat: status byte
 626  *
 627  *      Error reporting, in human readable form (luxurious, but a memory hog).
 628  *      Combines the drive name, message and status byte to provide a
 629  *      user understandable explanation of the device error.
 630  */
 631
 632 u8 ide_dump_status(ide_drive_t *drive, const char *msg, u8 stat)
 633 {
 634         if (drive->media == ide_disk)
 635                 return ide_dump_ata_status(drive, msg, stat);
 636         return ide_dump_atapi_status(drive, msg, stat);
 637 }
 638
 639 EXPORT_SYMBOL(ide_dump_status);