#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> static const char *udma_str[] = { "UDMA/16", "UDMA/25", "UDMA/33", "UDMA/44", "UDMA/66", "UDMA/100", "UDMA/133", "UDMA7" }; static const char *mwdma_str[] = { "MWDMA0", "MWDMA1", "MWDMA2" }; static const char *swdma_str[] = { "SWDMA0", "SWDMA1", "SWDMA2" }; static const char *pio_str[] = { "PIO0", "PIO1", "PIO2", "PIO3", "PIO4", "PIO5" }; /** * ide_xfer_verbose - return IDE mode names * @mode: transfer mode * * Returns a constant string giving the name of the mode * requested. */ const char *ide_xfer_verbose(u8 mode) { const char *s; u8 i = mode & 0xf; if (mode >= XFER_UDMA_0 && mode <= XFER_UDMA_7) s = udma_str[i]; else if (mode >= XFER_MW_DMA_0 && mode <= XFER_MW_DMA_2) s = mwdma_str[i]; else if (mode >= XFER_SW_DMA_0 && mode <= XFER_SW_DMA_2) s = swdma_str[i]; else if (mode >= XFER_PIO_0 && mode <= XFER_PIO_5) s = pio_str[i & 0x7]; else if (mode == XFER_PIO_SLOW) s = "PIO SLOW"; else s = "XFER ERROR"; return s; } 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. * * TODO: check device PIO capabilities */ static u8 ide_rate_filter(ide_drive_t *drive, u8 speed) { ide_hwif_t *hwif = drive->hwif; u8 mode = ide_find_dma_mode(drive, speed); if (mode == 0) { if (hwif->pio_mask) mode = fls(hwif->pio_mask) - 1 + XFER_PIO_0; else mode = XFER_PIO_4; } // printk("%s: mode 0x%02x, speed 0x%02x\n", __FUNCTION__, mode, speed); return min(speed, mode); } /* * 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 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 AC31000", 3 }, { "WDC AC31200", 3 }, { "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 }, { "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; } unsigned int ide_pio_cycle_time(ide_drive_t *drive, u8 pio) { struct hd_driveid *id = drive->id; int cycle_time = 0; if (id->field_valid & 2) { if (id->capability & 8) cycle_time = id->eide_pio_iordy; else cycle_time = id->eide_pio; } /* conservative "downgrade" for all pre-ATA2 drives */ if (pio < 3) { if (cycle_time && cycle_time < ide_pio_timings[pio].cycle_time) cycle_time = 0; /* use standard timing */ } return cycle_time ? cycle_time : ide_pio_timings[pio].cycle_time; } EXPORT_SYMBOL_GPL(ide_pio_cycle_time); /** * ide_get_best_pio_mode - get PIO mode from drive * @drive: drive to consider * @mode_wanted: preferred mode * @max_mode: highest allowed mode * * 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) { int pio_mode; struct hd_driveid* id = drive->id; int overridden = 0; if (mode_wanted != 255) return min_t(u8, mode_wanted, max_mode); if ((drive->hwif->host_flags & IDE_HFLAG_PIO_NO_BLACKLIST) == 0 && (pio_mode = ide_scan_pio_blacklist(id->model)) != -1) { printk(KERN_INFO "%s: is on PIO blacklist\n", drive->name); } 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) { /* IORDY supported? */ 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; } } } if (overridden) printk(KERN_INFO "%s: tPIO > 2, assuming tPIO = 2\n", drive->name); /* * Conservative "downgrade" for all pre-ATA2 drives */ if ((drive->hwif->host_flags & IDE_HFLAG_PIO_NO_DOWNGRADE) == 0 && pio_mode && pio_mode < 4) { pio_mode--; printk(KERN_INFO "%s: applying conservative " "PIO \"downgrade\"\n", drive->name); } } if (pio_mode > max_mode) pio_mode = max_mode; return pio_mode; } EXPORT_SYMBOL_GPL(ide_get_best_pio_mode); /* req_pio == "255" for auto-tune */ void ide_set_pio(ide_drive_t *drive, u8 req_pio) { ide_hwif_t *hwif = drive->hwif; u8 host_pio, pio; if (hwif->set_pio_mode == NULL) return; BUG_ON(hwif->pio_mask == 0x00); host_pio = fls(hwif->pio_mask) - 1; pio = ide_get_best_pio_mode(drive, req_pio, host_pio); /* * TODO: * - report device max PIO mode * - check req_pio != 255 against device max PIO mode */ printk(KERN_DEBUG "%s: host max PIO%d wanted PIO%d%s selected PIO%d\n", drive->name, host_pio, req_pio, req_pio == 255 ? "(auto-tune)" : "", pio); (void)ide_set_pio_mode(drive, XFER_PIO_0 + pio); } EXPORT_SYMBOL_GPL(ide_set_pio); /** * 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) { struct device *dev = drive->hwif->dev; if (dev && dev->dma_mask) addr = *dev->dma_mask; } if (drive->queue) blk_queue_bounce_limit(drive->queue, addr); } int ide_set_pio_mode(ide_drive_t *drive, const u8 mode) { ide_hwif_t *hwif = drive->hwif; if (hwif->set_pio_mode == NULL) return -1; /* * TODO: temporary hack for some legacy host drivers that didn't * set transfer mode on the device in ->set_pio_mode method... */ if (hwif->set_dma_mode == NULL) { hwif->set_pio_mode(drive, mode - XFER_PIO_0); return 0; } if (hwif->host_flags & IDE_HFLAG_POST_SET_MODE) { if (ide_config_drive_speed(drive, mode)) return -1; hwif->set_pio_mode(drive, mode - XFER_PIO_0); return 0; } else { hwif->set_pio_mode(drive, mode - XFER_PIO_0); return ide_config_drive_speed(drive, mode); } } int ide_set_dma_mode(ide_drive_t *drive, const u8 mode) { ide_hwif_t *hwif = drive->hwif; if (hwif->set_dma_mode == NULL) return -1; if (hwif->host_flags & IDE_HFLAG_POST_SET_MODE) { if (ide_config_drive_speed(drive, mode)) return -1; hwif->set_dma_mode(drive, mode); return 0; } else { hwif->set_dma_mode(drive, mode); return ide_config_drive_speed(drive, mode); } } EXPORT_SYMBOL_GPL(ide_set_dma_mode); /** * ide_set_xfer_rate - set transfer rate * @drive: drive to set * @rate: 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 ->set_pio_mode/->set_dma_mode does not. */ int ide_set_xfer_rate(ide_drive_t *drive, u8 rate) { ide_hwif_t *hwif = drive->hwif; if (hwif->set_dma_mode == NULL) return -1; rate = ide_rate_filter(drive, rate); if (rate >= XFER_PIO_0 && rate <= XFER_PIO_5) return ide_set_pio_mode(drive, rate); /* * TODO: transfer modes 0x00-0x07 passed from the user-space are * currently handled here which needs fixing (please note that such * case could happen iff the transfer mode has already been set on * the device by ide-proc.c::set_xfer_rate()). */ if (rate < XFER_PIO_0) { if (hwif->host_flags & IDE_HFLAG_ABUSE_SET_DMA_MODE) return ide_set_dma_mode(drive, rate); else return ide_config_drive_speed(drive, rate); } return ide_set_dma_mode(drive, rate); } static void ide_dump_opcode(ide_drive_t *drive) { struct request *rq; ide_task_t *task = NULL; 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_TASKFILE) task = rq->special; printk("ide: failed opcode was: "); if (task == NULL) printk(KERN_CONT "unknown\n"); else printk(KERN_CONT "0x%02x\n", task->tf.command); } u64 ide_get_lba_addr(struct ide_taskfile *tf, int lba48) { u32 high, low; if (lba48) high = (tf->hob_lbah << 16) | (tf->hob_lbam << 8) | tf->hob_lbal; else high = tf->device & 0xf; low = (tf->lbah << 16) | (tf->lbam << 8) | tf->lbal; return ((u64)high << 24) | low; } EXPORT_SYMBOL_GPL(ide_get_lba_addr); static void ide_dump_sector(ide_drive_t *drive) { ide_task_t task; struct ide_taskfile *tf = &task.tf; int lba48 = (drive->addressing == 1) ? 1 : 0; memset(&task, 0, sizeof(task)); if (lba48) task.tf_flags = IDE_TFLAG_IN_LBA | IDE_TFLAG_IN_HOB_LBA | IDE_TFLAG_LBA48; else task.tf_flags = IDE_TFLAG_IN_LBA | IDE_TFLAG_IN_DEVICE; ide_tf_read(drive, &task); if (lba48 || (tf->device & ATA_LBA)) printk(", LBAsect=%llu", (unsigned long long)ide_get_lba_addr(tf, lba48)); else printk(", CHS=%d/%d/%d", (tf->lbah << 8) + tf->lbam, tf->device & 0xf, tf->lbal); } static void ide_dump_ata_error(ide_drive_t *drive, u8 err) { printk("{ "); 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))) { ide_dump_sector(drive); if (HWGROUP(drive) && HWGROUP(drive)->rq) printk(", sector=%llu", (unsigned long long)HWGROUP(drive)->rq->sector); } printk("\n"); } static void ide_dump_atapi_error(ide_drive_t *drive, u8 err) { printk("{ "); if (err & ILI_ERR) printk("IllegalLengthIndication "); if (err & EOM_ERR) printk("EndOfMedia "); if (err & ABRT_ERR) printk("AbortedCommand "); if (err & MCR_ERR) printk("MediaChangeRequested "); if (err & LFS_ERR) printk("LastFailedSense=0x%02x ", (err & LFS_ERR) >> 4); printk("}\n"); } /** * ide_dump_status - translate ATA/ATAPI error * @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). * 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) { 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 = ide_read_error(drive); printk("%s: %s: error=0x%02x ", drive->name, msg, err); if (drive->media == ide_disk) ide_dump_ata_error(drive, err); else ide_dump_atapi_error(drive, err); } ide_dump_opcode(drive); local_irq_restore(flags); return err; } EXPORT_SYMBOL(ide_dump_status);