| #include <linux/module.h> |
| #include <linux/types.h> |
| #include <linux/string.h> |
| #include <linux/kernel.h> |
| #include <linux/timer.h> |
| #include <linux/mm.h> |
| #include <linux/interrupt.h> |
| #include <linux/major.h> |
| #include <linux/errno.h> |
| #include <linux/genhd.h> |
| #include <linux/blkpg.h> |
| #include <linux/slab.h> |
| #include <linux/pci.h> |
| #include <linux/delay.h> |
| #include <linux/hdreg.h> |
| #include <linux/ide.h> |
| #include <linux/bitops.h> |
| |
| #include <asm/byteorder.h> |
| #include <asm/irq.h> |
| #include <asm/uaccess.h> |
| #include <asm/io.h> |
| |
| /* |
| * IDE library routines. These are plug in code that most |
| * drivers can use but occasionally may be weird enough |
| * to want to do their own thing with |
| * |
| * Add common non I/O op stuff here. Make sure it has proper |
| * kernel-doc function headers or your patch will be rejected |
| */ |
| |
| |
| /** |
| * ide_xfer_verbose - return IDE mode names |
| * @xfer_rate: rate to name |
| * |
| * Returns a constant string giving the name of the mode |
| * requested. |
| */ |
| |
| char *ide_xfer_verbose (u8 xfer_rate) |
| { |
| switch(xfer_rate) { |
| case XFER_UDMA_7: return("UDMA 7"); |
| case XFER_UDMA_6: return("UDMA 6"); |
| case XFER_UDMA_5: return("UDMA 5"); |
| case XFER_UDMA_4: return("UDMA 4"); |
| case XFER_UDMA_3: return("UDMA 3"); |
| case XFER_UDMA_2: return("UDMA 2"); |
| case XFER_UDMA_1: return("UDMA 1"); |
| case XFER_UDMA_0: return("UDMA 0"); |
| case XFER_MW_DMA_2: return("MW DMA 2"); |
| case XFER_MW_DMA_1: return("MW DMA 1"); |
| case XFER_MW_DMA_0: return("MW DMA 0"); |
| case XFER_SW_DMA_2: return("SW DMA 2"); |
| case XFER_SW_DMA_1: return("SW DMA 1"); |
| case XFER_SW_DMA_0: return("SW DMA 0"); |
| case XFER_PIO_4: return("PIO 4"); |
| case XFER_PIO_3: return("PIO 3"); |
| case XFER_PIO_2: return("PIO 2"); |
| case XFER_PIO_1: return("PIO 1"); |
| case XFER_PIO_0: return("PIO 0"); |
| case XFER_PIO_SLOW: return("PIO SLOW"); |
| default: return("XFER ERROR"); |
| } |
| } |
| |
| EXPORT_SYMBOL(ide_xfer_verbose); |
| |
| /** |
| * ide_rate_filter - filter transfer mode |
| * @drive: IDE device |
| * @speed: desired speed |
| * |
| * Given the available transfer modes this function returns |
| * the best available speed at or below the speed requested. |
| * |
| * FIXME: filter also PIO/SWDMA/MWDMA modes |
| */ |
| |
| u8 ide_rate_filter(ide_drive_t *drive, u8 speed) |
| { |
| #ifdef CONFIG_BLK_DEV_IDEDMA |
| ide_hwif_t *hwif = drive->hwif; |
| u8 mask = hwif->ultra_mask, mode = XFER_MW_DMA_2; |
| |
| if (hwif->udma_filter) |
| mask = hwif->udma_filter(drive); |
| |
| /* |
| * TODO: speed > XFER_UDMA_2 extra check is needed to avoid false |
| * cable warning from eighty_ninty_three(), moving ide_rate_filter() |
| * calls from ->speedproc to core code will make this hack go away |
| */ |
| if (speed > XFER_UDMA_2) { |
| if ((mask & 0x78) && (eighty_ninty_three(drive) == 0)) |
| mask &= 0x07; |
| } |
| |
| if (mask) |
| mode = fls(mask) - 1 + XFER_UDMA_0; |
| |
| // printk("%s: mode 0x%02x, speed 0x%02x\n", __FUNCTION__, mode, speed); |
| |
| return min(speed, mode); |
| #else /* !CONFIG_BLK_DEV_IDEDMA */ |
| return min(speed, (u8)XFER_PIO_4); |
| #endif /* CONFIG_BLK_DEV_IDEDMA */ |
| } |
| |
| EXPORT_SYMBOL(ide_rate_filter); |
| |
| int ide_use_fast_pio(ide_drive_t *drive) |
| { |
| struct hd_driveid *id = drive->id; |
| |
| if ((id->capability & 1) && drive->autodma) |
| return 1; |
| |
| if ((id->capability & 8) || (id->field_valid & 2)) |
| return 1; |
| |
| return 0; |
| } |
| |
| EXPORT_SYMBOL_GPL(ide_use_fast_pio); |
| |
| /* |
| * Standard (generic) timings for PIO modes, from ATA2 specification. |
| * These timings are for access to the IDE data port register *only*. |
| * Some drives may specify a mode, while also specifying a different |
| * value for cycle_time (from drive identification data). |
| */ |
| const ide_pio_timings_t ide_pio_timings[6] = { |
| { 70, 165, 600 }, /* PIO Mode 0 */ |
| { 50, 125, 383 }, /* PIO Mode 1 */ |
| { 30, 100, 240 }, /* PIO Mode 2 */ |
| { 30, 80, 180 }, /* PIO Mode 3 with IORDY */ |
| { 25, 70, 120 }, /* PIO Mode 4 with IORDY */ |
| { 20, 50, 100 } /* PIO Mode 5 with IORDY (nonstandard) */ |
| }; |
| |
| EXPORT_SYMBOL_GPL(ide_pio_timings); |
| |
| /* |
| * Shared data/functions for determining best PIO mode for an IDE drive. |
| * Most of this stuff originally lived in cmd640.c, and changes to the |
| * ide_pio_blacklist[] table should be made with EXTREME CAUTION to avoid |
| * breaking the fragile cmd640.c support. |
| */ |
| |
| /* |
| * Black list. Some drives incorrectly report their maximal PIO mode, |
| * at least in respect to CMD640. Here we keep info on some known drives. |
| */ |
| static struct ide_pio_info { |
| const char *name; |
| int pio; |
| } ide_pio_blacklist [] = { |
| /* { "Conner Peripherals 1275MB - CFS1275A", 4 }, */ |
| { "Conner Peripherals 540MB - CFS540A", 3 }, |
| |
| { "WDC AC2700", 3 }, |
| { "WDC AC2540", 3 }, |
| { "WDC AC2420", 3 }, |
| { "WDC AC2340", 3 }, |
| { "WDC AC2250", 0 }, |
| { "WDC AC2200", 0 }, |
| { "WDC AC21200", 4 }, |
| { "WDC AC2120", 0 }, |
| { "WDC AC2850", 3 }, |
| { "WDC AC1270", 3 }, |
| { "WDC AC1170", 1 }, |
| { "WDC AC1210", 1 }, |
| { "WDC AC280", 0 }, |
| /* { "WDC AC21000", 4 }, */ |
| { "WDC AC31000", 3 }, |
| { "WDC AC31200", 3 }, |
| /* { "WDC AC31600", 4 }, */ |
| |
| { "Maxtor 7131 AT", 1 }, |
| { "Maxtor 7171 AT", 1 }, |
| { "Maxtor 7213 AT", 1 }, |
| { "Maxtor 7245 AT", 1 }, |
| { "Maxtor 7345 AT", 1 }, |
| { "Maxtor 7546 AT", 3 }, |
| { "Maxtor 7540 AV", 3 }, |
| |
| { "SAMSUNG SHD-3121A", 1 }, |
| { "SAMSUNG SHD-3122A", 1 }, |
| { "SAMSUNG SHD-3172A", 1 }, |
| |
| /* { "ST51080A", 4 }, |
| * { "ST51270A", 4 }, |
| * { "ST31220A", 4 }, |
| * { "ST31640A", 4 }, |
| * { "ST32140A", 4 }, |
| * { "ST3780A", 4 }, |
| */ |
| { "ST5660A", 3 }, |
| { "ST3660A", 3 }, |
| { "ST3630A", 3 }, |
| { "ST3655A", 3 }, |
| { "ST3391A", 3 }, |
| { "ST3390A", 1 }, |
| { "ST3600A", 1 }, |
| { "ST3290A", 0 }, |
| { "ST3144A", 0 }, |
| { "ST3491A", 1 }, /* reports 3, should be 1 or 2 (depending on */ |
| /* drive) according to Seagates FIND-ATA program */ |
| |
| { "QUANTUM ELS127A", 0 }, |
| { "QUANTUM ELS170A", 0 }, |
| { "QUANTUM LPS240A", 0 }, |
| { "QUANTUM LPS210A", 3 }, |
| { "QUANTUM LPS270A", 3 }, |
| { "QUANTUM LPS365A", 3 }, |
| { "QUANTUM LPS540A", 3 }, |
| { "QUANTUM LIGHTNING 540A", 3 }, |
| { "QUANTUM LIGHTNING 730A", 3 }, |
| |
| { "QUANTUM FIREBALL_540", 3 }, /* Older Quantum Fireballs don't work */ |
| { "QUANTUM FIREBALL_640", 3 }, |
| { "QUANTUM FIREBALL_1080", 3 }, |
| { "QUANTUM FIREBALL_1280", 3 }, |
| { NULL, 0 } |
| }; |
| |
| /** |
| * ide_scan_pio_blacklist - check for a blacklisted drive |
| * @model: Drive model string |
| * |
| * This routine searches the ide_pio_blacklist for an entry |
| * matching the start/whole of the supplied model name. |
| * |
| * Returns -1 if no match found. |
| * Otherwise returns the recommended PIO mode from ide_pio_blacklist[]. |
| */ |
| |
| static int ide_scan_pio_blacklist (char *model) |
| { |
| struct ide_pio_info *p; |
| |
| for (p = ide_pio_blacklist; p->name != NULL; p++) { |
| if (strncmp(p->name, model, strlen(p->name)) == 0) |
| return p->pio; |
| } |
| return -1; |
| } |
| |
| /** |
| * ide_get_best_pio_mode - get PIO mode from drive |
| * @drive: drive to consider |
| * @mode_wanted: preferred mode |
| * @max_mode: highest allowed mode |
| * @d: PIO data |
| * |
| * This routine returns the recommended PIO settings for a given drive, |
| * based on the drive->id information and the ide_pio_blacklist[]. |
| * |
| * Drive PIO mode is auto-selected if 255 is passed as mode_wanted. |
| * This is used by most chipset support modules when "auto-tuning". |
| */ |
| |
| u8 ide_get_best_pio_mode (ide_drive_t *drive, u8 mode_wanted, u8 max_mode, ide_pio_data_t *d) |
| { |
| int pio_mode; |
| int cycle_time = 0; |
| int use_iordy = 0; |
| struct hd_driveid* id = drive->id; |
| int overridden = 0; |
| |
| if (mode_wanted != 255) { |
| pio_mode = mode_wanted; |
| use_iordy = (pio_mode > 2); |
| } else if (!drive->id) { |
| pio_mode = 0; |
| } else if ((pio_mode = ide_scan_pio_blacklist(id->model)) != -1) { |
| printk(KERN_INFO "%s: is on PIO blacklist\n", drive->name); |
| use_iordy = (pio_mode > 2); |
| } else { |
| pio_mode = id->tPIO; |
| if (pio_mode > 2) { /* 2 is maximum allowed tPIO value */ |
| pio_mode = 2; |
| overridden = 1; |
| } |
| if (id->field_valid & 2) { /* drive implements ATA2? */ |
| if (id->capability & 8) { /* drive supports use_iordy? */ |
| use_iordy = 1; |
| cycle_time = id->eide_pio_iordy; |
| if (id->eide_pio_modes & 7) { |
| overridden = 0; |
| if (id->eide_pio_modes & 4) |
| pio_mode = 5; |
| else if (id->eide_pio_modes & 2) |
| pio_mode = 4; |
| else |
| pio_mode = 3; |
| } |
| } else { |
| cycle_time = id->eide_pio; |
| } |
| } |
| |
| if (overridden) |
| printk(KERN_INFO "%s: tPIO > 2, assuming tPIO = 2\n", |
| drive->name); |
| |
| /* |
| * Conservative "downgrade" for all pre-ATA2 drives |
| */ |
| if (pio_mode && pio_mode < 4) { |
| pio_mode--; |
| printk(KERN_INFO "%s: applying conservative " |
| "PIO \"downgrade\"\n", drive->name); |
| if (cycle_time && cycle_time < ide_pio_timings[pio_mode].cycle_time) |
| cycle_time = 0; /* use standard timing */ |
| } |
| } |
| if (pio_mode > max_mode) { |
| pio_mode = max_mode; |
| cycle_time = 0; |
| } |
| if (d) { |
| d->pio_mode = pio_mode; |
| d->cycle_time = cycle_time ? cycle_time : ide_pio_timings[pio_mode].cycle_time; |
| d->use_iordy = use_iordy; |
| } |
| return pio_mode; |
| } |
| |
| EXPORT_SYMBOL_GPL(ide_get_best_pio_mode); |
| |
| /** |
| * ide_toggle_bounce - handle bounce buffering |
| * @drive: drive to update |
| * @on: on/off boolean |
| * |
| * Enable or disable bounce buffering for the device. Drives move |
| * between PIO and DMA and that changes the rules we need. |
| */ |
| |
| void ide_toggle_bounce(ide_drive_t *drive, int on) |
| { |
| u64 addr = BLK_BOUNCE_HIGH; /* dma64_addr_t */ |
| |
| if (!PCI_DMA_BUS_IS_PHYS) { |
| addr = BLK_BOUNCE_ANY; |
| } else if (on && drive->media == ide_disk) { |
| if (HWIF(drive)->pci_dev) |
| addr = HWIF(drive)->pci_dev->dma_mask; |
| } |
| |
| if (drive->queue) |
| blk_queue_bounce_limit(drive->queue, addr); |
| } |
| |
| /** |
| * ide_set_xfer_rate - set transfer rate |
| * @drive: drive to set |
| * @speed: speed to attempt to set |
| * |
| * General helper for setting the speed of an IDE device. This |
| * function knows about user enforced limits from the configuration |
| * which speedproc() does not. High level drivers should never |
| * invoke speedproc() directly. |
| */ |
| |
| int ide_set_xfer_rate(ide_drive_t *drive, u8 rate) |
| { |
| #ifndef CONFIG_BLK_DEV_IDEDMA |
| rate = min(rate, (u8) XFER_PIO_4); |
| #endif |
| if(HWIF(drive)->speedproc) |
| return HWIF(drive)->speedproc(drive, rate); |
| else |
| return -1; |
| } |
| |
| static void ide_dump_opcode(ide_drive_t *drive) |
| { |
| struct request *rq; |
| u8 opcode = 0; |
| int found = 0; |
| |
| spin_lock(&ide_lock); |
| rq = NULL; |
| if (HWGROUP(drive)) |
| rq = HWGROUP(drive)->rq; |
| spin_unlock(&ide_lock); |
| if (!rq) |
| return; |
| if (rq->cmd_type == REQ_TYPE_ATA_CMD || |
| rq->cmd_type == REQ_TYPE_ATA_TASK) { |
| char *args = rq->buffer; |
| if (args) { |
| opcode = args[0]; |
| found = 1; |
| } |
| } else if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) { |
| ide_task_t *args = rq->special; |
| if (args) { |
| task_struct_t *tf = (task_struct_t *) args->tfRegister; |
| opcode = tf->command; |
| found = 1; |
| } |
| } |
| |
| printk("ide: failed opcode was: "); |
| if (!found) |
| printk("unknown\n"); |
| else |
| printk("0x%02x\n", opcode); |
| } |
| |
| static u8 ide_dump_ata_status(ide_drive_t *drive, const char *msg, u8 stat) |
| { |
| ide_hwif_t *hwif = HWIF(drive); |
| unsigned long flags; |
| u8 err = 0; |
| |
| local_irq_save(flags); |
| printk("%s: %s: status=0x%02x { ", drive->name, msg, stat); |
| if (stat & BUSY_STAT) |
| printk("Busy "); |
| else { |
| if (stat & READY_STAT) printk("DriveReady "); |
| if (stat & WRERR_STAT) printk("DeviceFault "); |
| if (stat & SEEK_STAT) printk("SeekComplete "); |
| if (stat & DRQ_STAT) printk("DataRequest "); |
| if (stat & ECC_STAT) printk("CorrectedError "); |
| if (stat & INDEX_STAT) printk("Index "); |
| if (stat & ERR_STAT) printk("Error "); |
| } |
| printk("}\n"); |
| if ((stat & (BUSY_STAT|ERR_STAT)) == ERR_STAT) { |
| err = hwif->INB(IDE_ERROR_REG); |
| printk("%s: %s: error=0x%02x { ", drive->name, msg, err); |
| if (err & ABRT_ERR) printk("DriveStatusError "); |
| if (err & ICRC_ERR) |
| printk((err & ABRT_ERR) ? "BadCRC " : "BadSector "); |
| if (err & ECC_ERR) printk("UncorrectableError "); |
| if (err & ID_ERR) printk("SectorIdNotFound "); |
| if (err & TRK0_ERR) printk("TrackZeroNotFound "); |
| if (err & MARK_ERR) printk("AddrMarkNotFound "); |
| printk("}"); |
| if ((err & (BBD_ERR | ABRT_ERR)) == BBD_ERR || |
| (err & (ECC_ERR|ID_ERR|MARK_ERR))) { |
| if (drive->addressing == 1) { |
| __u64 sectors = 0; |
| u32 low = 0, high = 0; |
| low = ide_read_24(drive); |
| hwif->OUTB(drive->ctl|0x80, IDE_CONTROL_REG); |
| high = ide_read_24(drive); |
| sectors = ((__u64)high << 24) | low; |
| printk(", LBAsect=%llu, high=%d, low=%d", |
| (unsigned long long) sectors, |
| high, low); |
| } else { |
| u8 cur = hwif->INB(IDE_SELECT_REG); |
| if (cur & 0x40) { /* using LBA? */ |
| printk(", LBAsect=%ld", (unsigned long) |
| ((cur&0xf)<<24) |
| |(hwif->INB(IDE_HCYL_REG)<<16) |
| |(hwif->INB(IDE_LCYL_REG)<<8) |
| | hwif->INB(IDE_SECTOR_REG)); |
| } else { |
| printk(", CHS=%d/%d/%d", |
| (hwif->INB(IDE_HCYL_REG)<<8) + |
| hwif->INB(IDE_LCYL_REG), |
| cur & 0xf, |
| hwif->INB(IDE_SECTOR_REG)); |
| } |
| } |
| if (HWGROUP(drive) && HWGROUP(drive)->rq) |
| printk(", sector=%llu", |
| (unsigned long long)HWGROUP(drive)->rq->sector); |
| } |
| printk("\n"); |
| } |
| ide_dump_opcode(drive); |
| local_irq_restore(flags); |
| return err; |
| } |
| |
| /** |
| * ide_dump_atapi_status - print human readable atapi status |
| * @drive: drive that status applies to |
| * @msg: text message to print |
| * @stat: status byte to decode |
| * |
| * Error reporting, in human readable form (luxurious, but a memory hog). |
| */ |
| |
| static u8 ide_dump_atapi_status(ide_drive_t *drive, const char *msg, u8 stat) |
| { |
| unsigned long flags; |
| |
| atapi_status_t status; |
| atapi_error_t error; |
| |
| status.all = stat; |
| error.all = 0; |
| local_irq_save(flags); |
| printk("%s: %s: status=0x%02x { ", drive->name, msg, stat); |
| if (status.b.bsy) |
| printk("Busy "); |
| else { |
| if (status.b.drdy) printk("DriveReady "); |
| if (status.b.df) printk("DeviceFault "); |
| if (status.b.dsc) printk("SeekComplete "); |
| if (status.b.drq) printk("DataRequest "); |
| if (status.b.corr) printk("CorrectedError "); |
| if (status.b.idx) printk("Index "); |
| if (status.b.check) printk("Error "); |
| } |
| printk("}\n"); |
| if (status.b.check && !status.b.bsy) { |
| error.all = HWIF(drive)->INB(IDE_ERROR_REG); |
| printk("%s: %s: error=0x%02x { ", drive->name, msg, error.all); |
| if (error.b.ili) printk("IllegalLengthIndication "); |
| if (error.b.eom) printk("EndOfMedia "); |
| if (error.b.abrt) printk("AbortedCommand "); |
| if (error.b.mcr) printk("MediaChangeRequested "); |
| if (error.b.sense_key) printk("LastFailedSense=0x%02x ", |
| error.b.sense_key); |
| printk("}\n"); |
| } |
| ide_dump_opcode(drive); |
| local_irq_restore(flags); |
| return error.all; |
| } |
| |
| /** |
| * ide_dump_status - translate ATA/ATAPI error |
| * @drive: drive the error occured on |
| * @msg: information string |
| * @stat: status byte |
| * |
| * Error reporting, in human readable form (luxurious, but a memory hog). |
| * Combines the drive name, message and status byte to provide a |
| * user understandable explanation of the device error. |
| */ |
| |
| u8 ide_dump_status(ide_drive_t *drive, const char *msg, u8 stat) |
| { |
| if (drive->media == ide_disk) |
| return ide_dump_ata_status(drive, msg, stat); |
| return ide_dump_atapi_status(drive, msg, stat); |
| } |
| |
| EXPORT_SYMBOL(ide_dump_status); |