416 lines
10 KiB
C
416 lines
10 KiB
C
#include <linux/types.h>
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#include <linux/string.h>
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#include <linux/kernel.h>
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#include <linux/interrupt.h>
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#include <linux/ide.h>
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#include <linux/bitops.h>
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static const char *udma_str[] =
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{ "UDMA/16", "UDMA/25", "UDMA/33", "UDMA/44",
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"UDMA/66", "UDMA/100", "UDMA/133", "UDMA7" };
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static const char *mwdma_str[] =
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{ "MWDMA0", "MWDMA1", "MWDMA2" };
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static const char *swdma_str[] =
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{ "SWDMA0", "SWDMA1", "SWDMA2" };
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static const char *pio_str[] =
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{ "PIO0", "PIO1", "PIO2", "PIO3", "PIO4", "PIO5" };
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/**
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* ide_xfer_verbose - return IDE mode names
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* @mode: transfer mode
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*
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* Returns a constant string giving the name of the mode
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* requested.
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*/
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const char *ide_xfer_verbose(u8 mode)
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{
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const char *s;
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u8 i = mode & 0xf;
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if (mode >= XFER_UDMA_0 && mode <= XFER_UDMA_7)
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s = udma_str[i];
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else if (mode >= XFER_MW_DMA_0 && mode <= XFER_MW_DMA_2)
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s = mwdma_str[i];
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else if (mode >= XFER_SW_DMA_0 && mode <= XFER_SW_DMA_2)
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s = swdma_str[i];
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else if (mode >= XFER_PIO_0 && mode <= XFER_PIO_5)
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s = pio_str[i & 0x7];
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else if (mode == XFER_PIO_SLOW)
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s = "PIO SLOW";
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else
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s = "XFER ERROR";
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return s;
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}
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EXPORT_SYMBOL(ide_xfer_verbose);
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/**
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* ide_rate_filter - filter transfer mode
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* @drive: IDE device
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* @speed: desired speed
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*
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* Given the available transfer modes this function returns
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* the best available speed at or below the speed requested.
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*
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* TODO: check device PIO capabilities
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*/
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static u8 ide_rate_filter(ide_drive_t *drive, u8 speed)
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{
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ide_hwif_t *hwif = drive->hwif;
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u8 mode = ide_find_dma_mode(drive, speed);
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if (mode == 0) {
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if (hwif->pio_mask)
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mode = fls(hwif->pio_mask) - 1 + XFER_PIO_0;
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else
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mode = XFER_PIO_4;
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}
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/* printk("%s: mode 0x%02x, speed 0x%02x\n", __func__, mode, speed); */
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return min(speed, mode);
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}
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/**
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* ide_get_best_pio_mode - get PIO mode from drive
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* @drive: drive to consider
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* @mode_wanted: preferred mode
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* @max_mode: highest allowed mode
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*
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* This routine returns the recommended PIO settings for a given drive,
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* based on the drive->id information and the ide_pio_blacklist[].
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*
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* Drive PIO mode is auto-selected if 255 is passed as mode_wanted.
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* This is used by most chipset support modules when "auto-tuning".
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*/
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u8 ide_get_best_pio_mode (ide_drive_t *drive, u8 mode_wanted, u8 max_mode)
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{
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u16 *id = drive->id;
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int pio_mode = -1, overridden = 0;
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if (mode_wanted != 255)
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return min_t(u8, mode_wanted, max_mode);
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if ((drive->hwif->host_flags & IDE_HFLAG_PIO_NO_BLACKLIST) == 0)
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pio_mode = ide_scan_pio_blacklist((char *)&id[ATA_ID_PROD]);
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if (pio_mode != -1) {
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printk(KERN_INFO "%s: is on PIO blacklist\n", drive->name);
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} else {
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pio_mode = id[ATA_ID_OLD_PIO_MODES] >> 8;
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if (pio_mode > 2) { /* 2 is maximum allowed tPIO value */
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pio_mode = 2;
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overridden = 1;
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}
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if (id[ATA_ID_FIELD_VALID] & 2) { /* ATA2? */
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if (ata_id_has_iordy(id)) {
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if (id[ATA_ID_PIO_MODES] & 7) {
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overridden = 0;
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if (id[ATA_ID_PIO_MODES] & 4)
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pio_mode = 5;
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else if (id[ATA_ID_PIO_MODES] & 2)
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pio_mode = 4;
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else
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pio_mode = 3;
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}
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}
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}
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if (overridden)
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printk(KERN_INFO "%s: tPIO > 2, assuming tPIO = 2\n",
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drive->name);
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}
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if (pio_mode > max_mode)
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pio_mode = max_mode;
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return pio_mode;
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}
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EXPORT_SYMBOL_GPL(ide_get_best_pio_mode);
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/* req_pio == "255" for auto-tune */
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void ide_set_pio(ide_drive_t *drive, u8 req_pio)
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{
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ide_hwif_t *hwif = drive->hwif;
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const struct ide_port_ops *port_ops = hwif->port_ops;
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u8 host_pio, pio;
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if (port_ops == NULL || port_ops->set_pio_mode == NULL ||
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(hwif->host_flags & IDE_HFLAG_NO_SET_MODE))
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return;
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BUG_ON(hwif->pio_mask == 0x00);
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host_pio = fls(hwif->pio_mask) - 1;
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pio = ide_get_best_pio_mode(drive, req_pio, host_pio);
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/*
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* TODO:
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* - report device max PIO mode
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* - check req_pio != 255 against device max PIO mode
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*/
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printk(KERN_DEBUG "%s: host max PIO%d wanted PIO%d%s selected PIO%d\n",
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drive->name, host_pio, req_pio,
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req_pio == 255 ? "(auto-tune)" : "", pio);
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(void)ide_set_pio_mode(drive, XFER_PIO_0 + pio);
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}
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EXPORT_SYMBOL_GPL(ide_set_pio);
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/**
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* ide_toggle_bounce - handle bounce buffering
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* @drive: drive to update
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* @on: on/off boolean
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*
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* Enable or disable bounce buffering for the device. Drives move
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* between PIO and DMA and that changes the rules we need.
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*/
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void ide_toggle_bounce(ide_drive_t *drive, int on)
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{
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u64 addr = BLK_BOUNCE_HIGH; /* dma64_addr_t */
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if (!PCI_DMA_BUS_IS_PHYS) {
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addr = BLK_BOUNCE_ANY;
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} else if (on && drive->media == ide_disk) {
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struct device *dev = drive->hwif->dev;
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if (dev && dev->dma_mask)
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addr = *dev->dma_mask;
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}
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if (drive->queue)
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blk_queue_bounce_limit(drive->queue, addr);
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}
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int ide_set_pio_mode(ide_drive_t *drive, const u8 mode)
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{
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ide_hwif_t *hwif = drive->hwif;
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const struct ide_port_ops *port_ops = hwif->port_ops;
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if (hwif->host_flags & IDE_HFLAG_NO_SET_MODE)
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return 0;
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if (port_ops == NULL || port_ops->set_pio_mode == NULL)
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return -1;
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/*
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* TODO: temporary hack for some legacy host drivers that didn't
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* set transfer mode on the device in ->set_pio_mode method...
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*/
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if (port_ops->set_dma_mode == NULL) {
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port_ops->set_pio_mode(drive, mode - XFER_PIO_0);
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return 0;
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}
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if (hwif->host_flags & IDE_HFLAG_POST_SET_MODE) {
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if (ide_config_drive_speed(drive, mode))
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return -1;
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port_ops->set_pio_mode(drive, mode - XFER_PIO_0);
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return 0;
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} else {
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port_ops->set_pio_mode(drive, mode - XFER_PIO_0);
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return ide_config_drive_speed(drive, mode);
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}
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}
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int ide_set_dma_mode(ide_drive_t *drive, const u8 mode)
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{
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ide_hwif_t *hwif = drive->hwif;
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const struct ide_port_ops *port_ops = hwif->port_ops;
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if (hwif->host_flags & IDE_HFLAG_NO_SET_MODE)
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return 0;
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if (port_ops == NULL || port_ops->set_dma_mode == NULL)
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return -1;
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if (hwif->host_flags & IDE_HFLAG_POST_SET_MODE) {
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if (ide_config_drive_speed(drive, mode))
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return -1;
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port_ops->set_dma_mode(drive, mode);
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return 0;
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} else {
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port_ops->set_dma_mode(drive, mode);
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return ide_config_drive_speed(drive, mode);
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}
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}
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EXPORT_SYMBOL_GPL(ide_set_dma_mode);
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/**
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* ide_set_xfer_rate - set transfer rate
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* @drive: drive to set
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* @rate: speed to attempt to set
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*
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* General helper for setting the speed of an IDE device. This
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* function knows about user enforced limits from the configuration
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* which ->set_pio_mode/->set_dma_mode does not.
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*/
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int ide_set_xfer_rate(ide_drive_t *drive, u8 rate)
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{
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ide_hwif_t *hwif = drive->hwif;
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const struct ide_port_ops *port_ops = hwif->port_ops;
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if (port_ops == NULL || port_ops->set_dma_mode == NULL ||
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(hwif->host_flags & IDE_HFLAG_NO_SET_MODE))
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return -1;
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rate = ide_rate_filter(drive, rate);
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BUG_ON(rate < XFER_PIO_0);
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if (rate >= XFER_PIO_0 && rate <= XFER_PIO_5)
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return ide_set_pio_mode(drive, rate);
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return ide_set_dma_mode(drive, rate);
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}
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static void ide_dump_opcode(ide_drive_t *drive)
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{
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struct request *rq;
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ide_task_t *task = NULL;
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spin_lock(&ide_lock);
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rq = NULL;
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if (HWGROUP(drive))
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rq = HWGROUP(drive)->rq;
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spin_unlock(&ide_lock);
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if (!rq)
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return;
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if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE)
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task = rq->special;
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printk("ide: failed opcode was: ");
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if (task == NULL)
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printk(KERN_CONT "unknown\n");
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else
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printk(KERN_CONT "0x%02x\n", task->tf.command);
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}
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u64 ide_get_lba_addr(struct ide_taskfile *tf, int lba48)
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{
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u32 high, low;
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if (lba48)
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high = (tf->hob_lbah << 16) | (tf->hob_lbam << 8) |
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tf->hob_lbal;
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else
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high = tf->device & 0xf;
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low = (tf->lbah << 16) | (tf->lbam << 8) | tf->lbal;
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return ((u64)high << 24) | low;
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}
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EXPORT_SYMBOL_GPL(ide_get_lba_addr);
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static void ide_dump_sector(ide_drive_t *drive)
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{
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ide_task_t task;
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struct ide_taskfile *tf = &task.tf;
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u8 lba48 = !!(drive->dev_flags & IDE_DFLAG_LBA48);
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memset(&task, 0, sizeof(task));
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if (lba48)
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task.tf_flags = IDE_TFLAG_IN_LBA | IDE_TFLAG_IN_HOB_LBA |
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IDE_TFLAG_LBA48;
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else
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task.tf_flags = IDE_TFLAG_IN_LBA | IDE_TFLAG_IN_DEVICE;
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drive->hwif->tp_ops->tf_read(drive, &task);
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if (lba48 || (tf->device & ATA_LBA))
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printk(", LBAsect=%llu",
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(unsigned long long)ide_get_lba_addr(tf, lba48));
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else
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printk(", CHS=%d/%d/%d", (tf->lbah << 8) + tf->lbam,
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tf->device & 0xf, tf->lbal);
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}
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static void ide_dump_ata_error(ide_drive_t *drive, u8 err)
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{
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printk("{ ");
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if (err & ATA_ABORTED) printk("DriveStatusError ");
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if (err & ATA_ICRC)
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printk((err & ATA_ABORTED) ? "BadCRC " : "BadSector ");
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if (err & ATA_UNC) printk("UncorrectableError ");
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if (err & ATA_IDNF) printk("SectorIdNotFound ");
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if (err & ATA_TRK0NF) printk("TrackZeroNotFound ");
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if (err & ATA_AMNF) printk("AddrMarkNotFound ");
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printk("}");
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if ((err & (ATA_BBK | ATA_ABORTED)) == ATA_BBK ||
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(err & (ATA_UNC | ATA_IDNF | ATA_AMNF))) {
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ide_dump_sector(drive);
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if (HWGROUP(drive) && HWGROUP(drive)->rq)
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printk(", sector=%llu",
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(unsigned long long)HWGROUP(drive)->rq->sector);
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}
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printk("\n");
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}
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static void ide_dump_atapi_error(ide_drive_t *drive, u8 err)
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{
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printk("{ ");
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if (err & ATAPI_ILI) printk("IllegalLengthIndication ");
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if (err & ATAPI_EOM) printk("EndOfMedia ");
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if (err & ATA_ABORTED) printk("AbortedCommand ");
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if (err & ATA_MCR) printk("MediaChangeRequested ");
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if (err & ATAPI_LFS) printk("LastFailedSense=0x%02x ",
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(err & ATAPI_LFS) >> 4);
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printk("}\n");
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}
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/**
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* ide_dump_status - translate ATA/ATAPI error
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* @drive: drive that status applies to
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* @msg: text message to print
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* @stat: status byte to decode
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*
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* Error reporting, in human readable form (luxurious, but a memory hog).
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* Combines the drive name, message and status byte to provide a
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* user understandable explanation of the device error.
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*/
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u8 ide_dump_status(ide_drive_t *drive, const char *msg, u8 stat)
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{
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unsigned long flags;
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u8 err = 0;
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local_irq_save(flags);
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printk("%s: %s: status=0x%02x { ", drive->name, msg, stat);
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if (stat & ATA_BUSY)
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printk("Busy ");
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else {
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if (stat & ATA_DRDY) printk("DriveReady ");
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if (stat & ATA_DF) printk("DeviceFault ");
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if (stat & ATA_DSC) printk("SeekComplete ");
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if (stat & ATA_DRQ) printk("DataRequest ");
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if (stat & ATA_CORR) printk("CorrectedError ");
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if (stat & ATA_IDX) printk("Index ");
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if (stat & ATA_ERR) printk("Error ");
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}
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printk("}\n");
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if ((stat & (ATA_BUSY | ATA_ERR)) == ATA_ERR) {
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err = ide_read_error(drive);
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printk("%s: %s: error=0x%02x ", drive->name, msg, err);
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if (drive->media == ide_disk)
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ide_dump_ata_error(drive, err);
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else
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ide_dump_atapi_error(drive, err);
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}
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ide_dump_opcode(drive);
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local_irq_restore(flags);
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return err;
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}
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EXPORT_SYMBOL(ide_dump_status);
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