| #include <linux/types.h> |
| #include <linux/string.h> |
| #include <linux/kernel.h> |
| #include <linux/interrupt.h> |
| #include <linux/ide.h> |
| #include <linux/bitops.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", __func__, mode, speed); */ |
| |
| return min(speed, mode); |
| } |
| |
| /** |
| * 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) |
| { |
| u16 *id = drive->id; |
| int pio_mode = -1, 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((char *)&id[ATA_ID_PROD]); |
| |
| if (pio_mode != -1) { |
| printk(KERN_INFO "%s: is on PIO blacklist\n", drive->name); |
| } else { |
| pio_mode = id[ATA_ID_OLD_PIO_MODES] >> 8; |
| if (pio_mode > 2) { /* 2 is maximum allowed tPIO value */ |
| pio_mode = 2; |
| overridden = 1; |
| } |
| |
| if (id[ATA_ID_FIELD_VALID] & 2) { /* ATA2? */ |
| if (ata_id_has_iordy(id)) { |
| if (id[ATA_ID_PIO_MODES] & 7) { |
| overridden = 0; |
| if (id[ATA_ID_PIO_MODES] & 4) |
| pio_mode = 5; |
| else if (id[ATA_ID_PIO_MODES] & 2) |
| pio_mode = 4; |
| else |
| pio_mode = 3; |
| } |
| } |
| } |
| |
| if (overridden) |
| printk(KERN_INFO "%s: tPIO > 2, assuming tPIO = 2\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; |
| const struct ide_port_ops *port_ops = hwif->port_ops; |
| u8 host_pio, pio; |
| |
| if (port_ops == NULL || port_ops->set_pio_mode == NULL || |
| (hwif->host_flags & IDE_HFLAG_NO_SET_MODE)) |
| 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; |
| const struct ide_port_ops *port_ops = hwif->port_ops; |
| |
| if (hwif->host_flags & IDE_HFLAG_NO_SET_MODE) |
| return 0; |
| |
| if (port_ops == NULL || port_ops->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 (port_ops->set_dma_mode == NULL) { |
| port_ops->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; |
| port_ops->set_pio_mode(drive, mode - XFER_PIO_0); |
| return 0; |
| } else { |
| port_ops->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; |
| const struct ide_port_ops *port_ops = hwif->port_ops; |
| |
| if (hwif->host_flags & IDE_HFLAG_NO_SET_MODE) |
| return 0; |
| |
| if (port_ops == NULL || port_ops->set_dma_mode == NULL) |
| return -1; |
| |
| if (hwif->host_flags & IDE_HFLAG_POST_SET_MODE) { |
| if (ide_config_drive_speed(drive, mode)) |
| return -1; |
| port_ops->set_dma_mode(drive, mode); |
| return 0; |
| } else { |
| port_ops->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; |
| const struct ide_port_ops *port_ops = hwif->port_ops; |
| |
| if (port_ops == NULL || port_ops->set_dma_mode == NULL || |
| (hwif->host_flags & IDE_HFLAG_NO_SET_MODE)) |
| return -1; |
| |
| rate = ide_rate_filter(drive, rate); |
| |
| BUG_ON(rate < XFER_PIO_0); |
| |
| if (rate >= XFER_PIO_0 && rate <= XFER_PIO_5) |
| return ide_set_pio_mode(drive, rate); |
| |
| return ide_set_dma_mode(drive, rate); |
| } |
| |
| static void ide_dump_opcode(ide_drive_t *drive) |
| { |
| struct request *rq = drive->hwif->hwgroup->rq; |
| ide_task_t *task = NULL; |
| |
| if (!rq) |
| return; |
| |
| if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) |
| task = rq->special; |
| |
| printk(KERN_ERR "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; |
| u8 lba48 = !!(drive->dev_flags & IDE_DFLAG_LBA48); |
| |
| 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; |
| |
| drive->hwif->tp_ops->tf_read(drive, &task); |
| |
| if (lba48 || (tf->device & ATA_LBA)) |
| printk(KERN_CONT ", LBAsect=%llu", |
| (unsigned long long)ide_get_lba_addr(tf, lba48)); |
| else |
| printk(KERN_CONT ", 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(KERN_ERR "{ "); |
| if (err & ATA_ABORTED) |
| printk(KERN_CONT "DriveStatusError "); |
| if (err & ATA_ICRC) |
| printk(KERN_CONT "%s", |
| (err & ATA_ABORTED) ? "BadCRC " : "BadSector "); |
| if (err & ATA_UNC) |
| printk(KERN_CONT "UncorrectableError "); |
| if (err & ATA_IDNF) |
| printk(KERN_CONT "SectorIdNotFound "); |
| if (err & ATA_TRK0NF) |
| printk(KERN_CONT "TrackZeroNotFound "); |
| if (err & ATA_AMNF) |
| printk(KERN_CONT "AddrMarkNotFound "); |
| printk(KERN_CONT "}"); |
| if ((err & (ATA_BBK | ATA_ABORTED)) == ATA_BBK || |
| (err & (ATA_UNC | ATA_IDNF | ATA_AMNF))) { |
| ide_dump_sector(drive); |
| if (HWGROUP(drive) && HWGROUP(drive)->rq) |
| printk(KERN_CONT ", sector=%llu", |
| (unsigned long long)HWGROUP(drive)->rq->sector); |
| } |
| printk(KERN_CONT "\n"); |
| } |
| |
| static void ide_dump_atapi_error(ide_drive_t *drive, u8 err) |
| { |
| printk(KERN_ERR "{ "); |
| if (err & ATAPI_ILI) |
| printk(KERN_CONT "IllegalLengthIndication "); |
| if (err & ATAPI_EOM) |
| printk(KERN_CONT "EndOfMedia "); |
| if (err & ATA_ABORTED) |
| printk(KERN_CONT "AbortedCommand "); |
| if (err & ATA_MCR) |
| printk(KERN_CONT "MediaChangeRequested "); |
| if (err & ATAPI_LFS) |
| printk(KERN_CONT "LastFailedSense=0x%02x ", |
| (err & ATAPI_LFS) >> 4); |
| printk(KERN_CONT "}\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(KERN_ERR "%s: %s: status=0x%02x { ", drive->name, msg, stat); |
| if (stat & ATA_BUSY) |
| printk(KERN_CONT "Busy "); |
| else { |
| if (stat & ATA_DRDY) |
| printk(KERN_CONT "DriveReady "); |
| if (stat & ATA_DF) |
| printk(KERN_CONT "DeviceFault "); |
| if (stat & ATA_DSC) |
| printk(KERN_CONT "SeekComplete "); |
| if (stat & ATA_DRQ) |
| printk(KERN_CONT "DataRequest "); |
| if (stat & ATA_CORR) |
| printk(KERN_CONT "CorrectedError "); |
| if (stat & ATA_IDX) |
| printk(KERN_CONT "Index "); |
| if (stat & ATA_ERR) |
| printk(KERN_CONT "Error "); |
| } |
| printk(KERN_CONT "}\n"); |
| if ((stat & (ATA_BUSY | ATA_ERR)) == ATA_ERR) { |
| err = ide_read_error(drive); |
| printk(KERN_ERR "%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); |