416 lines
10 KiB
C
416 lines
10 KiB
C
#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;
|
|
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;
|
|
|
|
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);
|