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_rate_filter         -       filter transfer mode
  73  *      @drive: IDE device
  74  *      @speed: desired speed
  75  *
  76  *      Given the available transfer modes this function returns
  77  *      the best available speed at or below the speed requested.
  78  *
  79  *      FIXME: filter also PIO/SWDMA/MWDMA modes
  80  */
  81
  82 u8 ide_rate_filter(ide_drive_t *drive, u8 speed)
  83 {
  84 #ifdef CONFIG_BLK_DEV_IDEDMA
  85         ide_hwif_t *hwif = drive->hwif;
  86         u8 mask = hwif->ultra_mask, mode = XFER_MW_DMA_2;
  87
  88         if (hwif->udma_filter)
  89                 mask = hwif->udma_filter(drive);
  90
  91         /*
  92          * TODO: speed > XFER_UDMA_2 extra check is needed to avoid false
  93          * cable warning from eighty_ninty_three(), moving ide_rate_filter()
  94          * calls from ->speedproc to core code will make this hack go away
  95          */
  96         if (speed > XFER_UDMA_2) {
  97                 if ((mask & 0x78) && (eighty_ninty_three(drive) == 0))
  98                         mask &= 0x07;
  99         }
 100
 101         if (mask)
 102                 mode = fls(mask) - 1 + XFER_UDMA_0;
 103
 104 //      printk("%s: mode 0x%02x, speed 0x%02x\n", __FUNCTION__, mode, speed);
 105
 106         return min(speed, mode);
 107 #else /* !CONFIG_BLK_DEV_IDEDMA */
 108         return min(speed, (u8)XFER_PIO_4);
 109 #endif /* CONFIG_BLK_DEV_IDEDMA */
 110 }
 111
 112 EXPORT_SYMBOL(ide_rate_filter);
 113
 114 int ide_dma_enable (ide_drive_t *drive)
 115 {
 116         ide_hwif_t *hwif        = HWIF(drive);
 117         struct hd_driveid *id   = drive->id;
 118
 119         return ((int)   ((((id->dma_ultra >> 8) & hwif->ultra_mask) ||
 120                           ((id->dma_mword >> 8) & hwif->mwdma_mask) ||
 121                           ((id->dma_1word >> 8) & hwif->swdma_mask)) ? 1 : 0));
 122 }
 123
 124 EXPORT_SYMBOL(ide_dma_enable);
 125
 126 int ide_use_fast_pio(ide_drive_t *drive)
 127 {
 128         struct hd_driveid *id = drive->id;
 129
 130         if ((id->capability & 1) && drive->autodma)
 131                 return 1;
 132
 133         if ((id->capability & 8) || (id->field_valid & 2))
 134                 return 1;
 135
 136         return 0;
 137 }
 138
 139 EXPORT_SYMBOL_GPL(ide_use_fast_pio);
 140
 141 /*
 142  * Standard (generic) timings for PIO modes, from ATA2 specification.
 143  * These timings are for access to the IDE data port register *only*.
 144  * Some drives may specify a mode, while also specifying a different
 145  * value for cycle_time (from drive identification data).
 146  */
 147 const ide_pio_timings_t ide_pio_timings[6] = {
 148         { 70,   165,    600 },  /* PIO Mode 0 */
 149         { 50,   125,    383 },  /* PIO Mode 1 */
 150         { 30,   100,    240 },  /* PIO Mode 2 */
 151         { 30,   80,     180 },  /* PIO Mode 3 with IORDY */
 152         { 25,   70,     120 },  /* PIO Mode 4 with IORDY */
 153         { 20,   50,     100 }   /* PIO Mode 5 with IORDY (nonstandard) */
 154 };
 155
 156 EXPORT_SYMBOL_GPL(ide_pio_timings);
 157
 158 /*
 159  * Shared data/functions for determining best PIO mode for an IDE drive.
 160  * Most of this stuff originally lived in cmd640.c, and changes to the
 161  * ide_pio_blacklist[] table should be made with EXTREME CAUTION to avoid
 162  * breaking the fragile cmd640.c support.
 163  */
 164
 165 /*
 166  * Black list. Some drives incorrectly report their maximal PIO mode,
 167  * at least in respect to CMD640. Here we keep info on some known drives.
 168  */
 169 static struct ide_pio_info {
 170         const char      *name;
 171         int             pio;
 172 } ide_pio_blacklist [] = {
 173 /*      { "Conner Peripherals 1275MB - CFS1275A", 4 }, */
 174         { "Conner Peripherals 540MB - CFS540A", 3 },
 175
 176         { "WDC AC2700",  3 },
 177         { "WDC AC2540",  3 },
 178         { "WDC AC2420",  3 },
 179         { "WDC AC2340",  3 },
 180         { "WDC AC2250",  0 },
 181         { "WDC AC2200",  0 },
 182         { "WDC AC21200", 4 },
 183         { "WDC AC2120",  0 },
 184         { "WDC AC2850",  3 },
 185         { "WDC AC1270",  3 },
 186         { "WDC AC1170",  1 },
 187         { "WDC AC1210",  1 },
 188         { "WDC AC280",   0 },
 189 /*      { "WDC AC21000", 4 }, */
 190         { "WDC AC31000", 3 },
 191         { "WDC AC31200", 3 },
 192 /*      { "WDC AC31600", 4 }, */
 193
 194         { "Maxtor 7131 AT", 1 },
 195         { "Maxtor 7171 AT", 1 },
 196         { "Maxtor 7213 AT", 1 },
 197         { "Maxtor 7245 AT", 1 },
 198         { "Maxtor 7345 AT", 1 },
 199         { "Maxtor 7546 AT", 3 },
 200         { "Maxtor 7540 AV", 3 },
 201
 202         { "SAMSUNG SHD-3121A", 1 },
 203         { "SAMSUNG SHD-3122A", 1 },
 204         { "SAMSUNG SHD-3172A", 1 },
 205
 206 /*      { "ST51080A", 4 },
 207  *      { "ST51270A", 4 },
 208  *      { "ST31220A", 4 },
 209  *      { "ST31640A", 4 },
 210  *      { "ST32140A", 4 },
 211  *      { "ST3780A",  4 },
 212  */
 213         { "ST5660A",  3 },
 214         { "ST3660A",  3 },
 215         { "ST3630A",  3 },
 216         { "ST3655A",  3 },
 217         { "ST3391A",  3 },
 218         { "ST3390A",  1 },
 219         { "ST3600A",  1 },
 220         { "ST3290A",  0 },
 221         { "ST3144A",  0 },
 222         { "ST3491A",  1 },      /* reports 3, should be 1 or 2 (depending on */
 223                                 /* drive) according to Seagates FIND-ATA program */
 224
 225         { "QUANTUM ELS127A", 0 },
 226         { "QUANTUM ELS170A", 0 },
 227         { "QUANTUM LPS240A", 0 },
 228         { "QUANTUM LPS210A", 3 },
 229         { "QUANTUM LPS270A", 3 },
 230         { "QUANTUM LPS365A", 3 },
 231         { "QUANTUM LPS540A", 3 },
 232         { "QUANTUM LIGHTNING 540A", 3 },
 233         { "QUANTUM LIGHTNING 730A", 3 },
 234
 235         { "QUANTUM FIREBALL_540", 3 }, /* Older Quantum Fireballs don't work */
 236         { "QUANTUM FIREBALL_640", 3 },
 237         { "QUANTUM FIREBALL_1080", 3 },
 238         { "QUANTUM FIREBALL_1280", 3 },
 239         { NULL, 0 }
 240 };
 241
 242 /**
 243  *      ide_scan_pio_blacklist  -       check for a blacklisted drive
 244  *      @model: Drive model string
 245  *
 246  *      This routine searches the ide_pio_blacklist for an entry
 247  *      matching the start/whole of the supplied model name.
 248  *
 249  *      Returns -1 if no match found.
 250  *      Otherwise returns the recommended PIO mode from ide_pio_blacklist[].
 251  */
 252
 253 static int ide_scan_pio_blacklist (char *model)
 254 {
 255         struct ide_pio_info *p;
 256
 257         for (p = ide_pio_blacklist; p->name != NULL; p++) {
 258                 if (strncmp(p->name, model, strlen(p->name)) == 0)
 259                         return p->pio;
 260         }
 261         return -1;
 262 }
 263
 264 /**
 265  *      ide_get_best_pio_mode   -       get PIO mode from drive
 266  *      @drive: drive to consider
 267  *      @mode_wanted: preferred mode
 268  *      @max_mode: highest allowed mode
 269  *      @d: PIO data
 270  *
 271  *      This routine returns the recommended PIO settings for a given drive,
 272  *      based on the drive->id information and the ide_pio_blacklist[].
 273  *
 274  *      Drive PIO mode is auto-selected if 255 is passed as mode_wanted.
 275  *      This is used by most chipset support modules when "auto-tuning".
 276  */
 277
 278 u8 ide_get_best_pio_mode (ide_drive_t *drive, u8 mode_wanted, u8 max_mode, ide_pio_data_t *d)
 279 {
 280         int pio_mode;
 281         int cycle_time = 0;
 282         int use_iordy = 0;
 283         struct hd_driveid* id = drive->id;
 284         int overridden  = 0;
 285
 286         if (mode_wanted != 255) {
 287                 pio_mode = mode_wanted;
 288                 use_iordy = (pio_mode > 2);
 289         } else if (!drive->id) {
 290                 pio_mode = 0;
 291         } else if ((pio_mode = ide_scan_pio_blacklist(id->model)) != -1) {
 292                 overridden = 1;
 293                 use_iordy = (pio_mode > 2);
 294         } else {
 295                 pio_mode = id->tPIO;
 296                 if (pio_mode > 2) {     /* 2 is maximum allowed tPIO value */
 297                         pio_mode = 2;
 298                         overridden = 1;
 299                 }
 300                 if (id->field_valid & 2) {        /* drive implements ATA2? */
 301                         if (id->capability & 8) { /* drive supports use_iordy? */
 302                                 use_iordy = 1;
 303                                 cycle_time = id->eide_pio_iordy;
 304                                 if (id->eide_pio_modes & 7) {
 305                                         overridden = 0;
 306                                         if (id->eide_pio_modes & 4)
 307                                                 pio_mode = 5;
 308                                         else if (id->eide_pio_modes & 2)
 309                                                 pio_mode = 4;
 310                                         else
 311                                                 pio_mode = 3;
 312                                 }
 313                         } else {
 314                                 cycle_time = id->eide_pio;
 315                         }
 316                 }
 317
 318                 /*
 319                  * Conservative "downgrade" for all pre-ATA2 drives
 320                  */
 321                 if (pio_mode && pio_mode < 4) {
 322                         pio_mode--;
 323                         overridden = 1;
 324                         if (cycle_time && cycle_time < ide_pio_timings[pio_mode].cycle_time)
 325                                 cycle_time = 0; /* use standard timing */
 326                 }
 327         }
 328         if (pio_mode > max_mode) {
 329                 pio_mode = max_mode;
 330                 cycle_time = 0;
 331         }
 332         if (d) {
 333                 d->pio_mode = pio_mode;
 334                 d->cycle_time = cycle_time ? cycle_time : ide_pio_timings[pio_mode].cycle_time;
 335                 d->use_iordy = use_iordy;
 336                 d->overridden = overridden;
 337         }
 338         return pio_mode;
 339 }
 340
 341 EXPORT_SYMBOL_GPL(ide_get_best_pio_mode);
 342
 343 /**
 344  *      ide_toggle_bounce       -       handle bounce buffering
 345  *      @drive: drive to update
 346  *      @on: on/off boolean
 347  *
 348  *      Enable or disable bounce buffering for the device. Drives move
 349  *      between PIO and DMA and that changes the rules we need.
 350  */
 351
 352 void ide_toggle_bounce(ide_drive_t *drive, int on)
 353 {
 354         u64 addr = BLK_BOUNCE_HIGH;     /* dma64_addr_t */
 355
 356         if (!PCI_DMA_BUS_IS_PHYS) {
 357                 addr = BLK_BOUNCE_ANY;
 358         } else if (on && drive->media == ide_disk) {
 359                 if (HWIF(drive)->pci_dev)
 360                         addr = HWIF(drive)->pci_dev->dma_mask;
 361         }
 362
 363         if (drive->queue)
 364                 blk_queue_bounce_limit(drive->queue, addr);
 365 }
 366
 367 /**
 368  *      ide_set_xfer_rate       -       set transfer rate
 369  *      @drive: drive to set
 370  *      @speed: speed to attempt to set
 371  *
 372  *      General helper for setting the speed of an IDE device. This
 373  *      function knows about user enforced limits from the configuration
 374  *      which speedproc() does not.  High level drivers should never
 375  *      invoke speedproc() directly.
 376  */
 377
 378 int ide_set_xfer_rate(ide_drive_t *drive, u8 rate)
 379 {
 380 #ifndef CONFIG_BLK_DEV_IDEDMA
 381         rate = min(rate, (u8) XFER_PIO_4);
 382 #endif
 383         if(HWIF(drive)->speedproc)
 384                 return HWIF(drive)->speedproc(drive, rate);
 385         else
 386                 return -1;
 387 }
 388
 389 static void ide_dump_opcode(ide_drive_t *drive)
 390 {
 391         struct request *rq;
 392         u8 opcode = 0;
 393         int found = 0;
 394
 395         spin_lock(&ide_lock);
 396         rq = NULL;
 397         if (HWGROUP(drive))
 398                 rq = HWGROUP(drive)->rq;
 399         spin_unlock(&ide_lock);
 400         if (!rq)
 401                 return;
 402         if (rq->cmd_type == REQ_TYPE_ATA_CMD ||
 403             rq->cmd_type == REQ_TYPE_ATA_TASK) {
 404                 char *args = rq->buffer;
 405                 if (args) {
 406                         opcode = args[0];
 407                         found = 1;
 408                 }
 409         } else if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
 410                 ide_task_t *args = rq->special;
 411                 if (args) {
 412                         task_struct_t *tf = (task_struct_t *) args->tfRegister;
 413                         opcode = tf->command;
 414                         found = 1;
 415                 }
 416         }
 417
 418         printk("ide: failed opcode was: ");
 419         if (!found)
 420                 printk("unknown\n");
 421         else
 422                 printk("0x%02x\n", opcode);
 423 }
 424
 425 static u8 ide_dump_ata_status(ide_drive_t *drive, const char *msg, u8 stat)
 426 {
 427         ide_hwif_t *hwif = HWIF(drive);
 428         unsigned long flags;
 429         u8 err = 0;
 430
 431         local_irq_save(flags);
 432         printk("%s: %s: status=0x%02x { ", drive->name, msg, stat);
 433         if (stat & BUSY_STAT)
 434                 printk("Busy ");
 435         else {
 436                 if (stat & READY_STAT)  printk("DriveReady ");
 437                 if (stat & WRERR_STAT)  printk("DeviceFault ");
 438                 if (stat & SEEK_STAT)   printk("SeekComplete ");
 439                 if (stat & DRQ_STAT)    printk("DataRequest ");
 440                 if (stat & ECC_STAT)    printk("CorrectedError ");
 441                 if (stat & INDEX_STAT)  printk("Index ");
 442                 if (stat & ERR_STAT)    printk("Error ");
 443         }
 444         printk("}\n");
 445         if ((stat & (BUSY_STAT|ERR_STAT)) == ERR_STAT) {
 446                 err = hwif->INB(IDE_ERROR_REG);
 447                 printk("%s: %s: error=0x%02x { ", drive->name, msg, err);
 448                 if (err & ABRT_ERR)     printk("DriveStatusError ");
 449                 if (err & ICRC_ERR)
 450                         printk((err & ABRT_ERR) ? "BadCRC " : "BadSector ");
 451                 if (err & ECC_ERR)      printk("UncorrectableError ");
 452                 if (err & ID_ERR)       printk("SectorIdNotFound ");
 453                 if (err & TRK0_ERR)     printk("TrackZeroNotFound ");
 454                 if (err & MARK_ERR)     printk("AddrMarkNotFound ");
 455                 printk("}");
 456                 if ((err & (BBD_ERR | ABRT_ERR)) == BBD_ERR ||
 457                     (err & (ECC_ERR|ID_ERR|MARK_ERR))) {
 458                         if (drive->addressing == 1) {
 459                                 __u64 sectors = 0;
 460                                 u32 low = 0, high = 0;
 461                                 low = ide_read_24(drive);
 462                                 hwif->OUTB(drive->ctl|0x80, IDE_CONTROL_REG);
 463                                 high = ide_read_24(drive);
 464                                 sectors = ((__u64)high << 24) | low;
 465                                 printk(", LBAsect=%llu, high=%d, low=%d",
 466                                        (unsigned long long) sectors,
 467                                        high, low);
 468                         } else {
 469                                 u8 cur = hwif->INB(IDE_SELECT_REG);
 470                                 if (cur & 0x40) {       /* using LBA? */
 471                                         printk(", LBAsect=%ld", (unsigned long)
 472                                          ((cur&0xf)<<24)
 473                                          |(hwif->INB(IDE_HCYL_REG)<<16)
 474                                          |(hwif->INB(IDE_LCYL_REG)<<8)
 475                                          | hwif->INB(IDE_SECTOR_REG));
 476                                 } else {
 477                                         printk(", CHS=%d/%d/%d",
 478                                          (hwif->INB(IDE_HCYL_REG)<<8) +
 479                                           hwif->INB(IDE_LCYL_REG),
 480                                           cur & 0xf,
 481                                           hwif->INB(IDE_SECTOR_REG));
 482                                 }
 483                         }
 484                         if (HWGROUP(drive) && HWGROUP(drive)->rq)
 485                                 printk(", sector=%llu",
 486                                         (unsigned long long)HWGROUP(drive)->rq->sector);
 487                 }
 488                 printk("\n");
 489         }
 490         ide_dump_opcode(drive);
 491         local_irq_restore(flags);
 492         return err;
 493 }
 494
 495 /**
 496  *      ide_dump_atapi_status       -       print human readable atapi status
 497  *      @drive: drive that status applies to
 498  *      @msg: text message to print
 499  *      @stat: status byte to decode
 500  *
 501  *      Error reporting, in human readable form (luxurious, but a memory hog).
 502  */
 503
 504 static u8 ide_dump_atapi_status(ide_drive_t *drive, const char *msg, u8 stat)
 505 {
 506         unsigned long flags;
 507
 508         atapi_status_t status;
 509         atapi_error_t error;
 510
 511         status.all = stat;
 512         error.all = 0;
 513         local_irq_save(flags);
 514         printk("%s: %s: status=0x%02x { ", drive->name, msg, stat);
 515         if (status.b.bsy)
 516                 printk("Busy ");
 517         else {
 518                 if (status.b.drdy)      printk("DriveReady ");
 519                 if (status.b.df)        printk("DeviceFault ");
 520                 if (status.b.dsc)       printk("SeekComplete ");
 521                 if (status.b.drq)       printk("DataRequest ");
 522                 if (status.b.corr)      printk("CorrectedError ");
 523                 if (status.b.idx)       printk("Index ");
 524                 if (status.b.check)     printk("Error ");
 525         }
 526         printk("}\n");
 527         if (status.b.check && !status.b.bsy) {
 528                 error.all = HWIF(drive)->INB(IDE_ERROR_REG);
 529                 printk("%s: %s: error=0x%02x { ", drive->name, msg, error.all);
 530                 if (error.b.ili)        printk("IllegalLengthIndication ");
 531                 if (error.b.eom)        printk("EndOfMedia ");
 532                 if (error.b.abrt)       printk("AbortedCommand ");
 533                 if (error.b.mcr)        printk("MediaChangeRequested ");
 534                 if (error.b.sense_key)  printk("LastFailedSense=0x%02x ",
 535                                                 error.b.sense_key);
 536                 printk("}\n");
 537         }
 538         ide_dump_opcode(drive);
 539         local_irq_restore(flags);
 540         return error.all;
 541 }
 542
 543 /**
 544  *      ide_dump_status         -       translate ATA/ATAPI error
 545  *      @drive: drive the error occured on
 546  *      @msg: information string
 547  *      @stat: status byte
 548  *
 549  *      Error reporting, in human readable form (luxurious, but a memory hog).
 550  *      Combines the drive name, message and status byte to provide a
 551  *      user understandable explanation of the device error.
 552  */
 553
 554 u8 ide_dump_status(ide_drive_t *drive, const char *msg, u8 stat)
 555 {
 556         if (drive->media == ide_disk)
 557                 return ide_dump_ata_status(drive, msg, stat);
 558         return ide_dump_atapi_status(drive, msg, stat);
 559 }
 560
 561 EXPORT_SYMBOL(ide_dump_status);