#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; 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; 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(", 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 & ATA_ABORTED) printk("DriveStatusError "); if (err & ATA_ICRC) printk((err & ATA_ABORTED) ? "BadCRC " : "BadSector "); if (err & ATA_UNC) printk("UncorrectableError "); if (err & ATA_IDNF) printk("SectorIdNotFound "); if (err & ATA_TRK0NF) printk("TrackZeroNotFound "); if (err & ATA_AMNF) printk("AddrMarkNotFound "); printk("}"); 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(", 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 & ATAPI_ILI) printk("IllegalLengthIndication "); if (err & ATAPI_EOM) printk("EndOfMedia "); if (err & ATA_ABORTED) printk("AbortedCommand "); if (err & ATA_MCR) printk("MediaChangeRequested "); if (err & ATAPI_LFS) printk("LastFailedSense=0x%02x ", (err & ATAPI_LFS) >> 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 & ATA_BUSY) printk("Busy "); else { if (stat & ATA_DRDY) printk("DriveReady "); if (stat & ATA_DF) printk("DeviceFault "); if (stat & ATA_DSC) printk("SeekComplete "); if (stat & ATA_DRQ) printk("DataRequest "); if (stat & ATA_CORR) printk("CorrectedError "); if (stat & ATA_IDX) printk("Index "); if (stat & ATA_ERR) printk("Error "); } printk("}\n"); if ((stat & (ATA_BUSY | ATA_ERR)) == ATA_ERR) { 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);