ide: move error handling code to ide-eh.c (v2)
Do some CodingStyle fixups in <linux/ide.h> while at it. v2: Add missing <linux/delay.h> include (reported by Stephen Rothwell). Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
Bartlomiej Zolnierkiewicz
parent
122f06f8bc
commit
327fa1c294
@ -6,7 +6,7 @@ EXTRA_CFLAGS += -Idrivers/ide
|
||||
|
||||
ide-core-y += ide.o ide-ioctls.o ide-io.o ide-iops.o ide-lib.o ide-probe.o \
|
||||
ide-taskfile.o ide-pm.o ide-park.o ide-sysfs.o ide-devsets.o \
|
||||
ide-io-std.o
|
||||
ide-io-std.o ide-eh.o
|
||||
|
||||
# core IDE code
|
||||
ide-core-$(CONFIG_IDE_XFER_MODE) += ide-pio-blacklist.o ide-xfer-mode.o
|
||||
|
||||
428
drivers/ide/ide-eh.c
Normal file
428
drivers/ide/ide-eh.c
Normal file
@ -0,0 +1,428 @@
|
||||
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/ide.h>
|
||||
#include <linux/delay.h>
|
||||
|
||||
static ide_startstop_t ide_ata_error(ide_drive_t *drive, struct request *rq,
|
||||
u8 stat, u8 err)
|
||||
{
|
||||
ide_hwif_t *hwif = drive->hwif;
|
||||
|
||||
if ((stat & ATA_BUSY) ||
|
||||
((stat & ATA_DF) && (drive->dev_flags & IDE_DFLAG_NOWERR) == 0)) {
|
||||
/* other bits are useless when BUSY */
|
||||
rq->errors |= ERROR_RESET;
|
||||
} else if (stat & ATA_ERR) {
|
||||
/* err has different meaning on cdrom and tape */
|
||||
if (err == ATA_ABORTED) {
|
||||
if ((drive->dev_flags & IDE_DFLAG_LBA) &&
|
||||
/* some newer drives don't support ATA_CMD_INIT_DEV_PARAMS */
|
||||
hwif->tp_ops->read_status(hwif) == ATA_CMD_INIT_DEV_PARAMS)
|
||||
return ide_stopped;
|
||||
} else if ((err & BAD_CRC) == BAD_CRC) {
|
||||
/* UDMA crc error, just retry the operation */
|
||||
drive->crc_count++;
|
||||
} else if (err & (ATA_BBK | ATA_UNC)) {
|
||||
/* retries won't help these */
|
||||
rq->errors = ERROR_MAX;
|
||||
} else if (err & ATA_TRK0NF) {
|
||||
/* help it find track zero */
|
||||
rq->errors |= ERROR_RECAL;
|
||||
}
|
||||
}
|
||||
|
||||
if ((stat & ATA_DRQ) && rq_data_dir(rq) == READ &&
|
||||
(hwif->host_flags & IDE_HFLAG_ERROR_STOPS_FIFO) == 0) {
|
||||
int nsect = drive->mult_count ? drive->mult_count : 1;
|
||||
|
||||
ide_pad_transfer(drive, READ, nsect * SECTOR_SIZE);
|
||||
}
|
||||
|
||||
if (rq->errors >= ERROR_MAX || blk_noretry_request(rq)) {
|
||||
ide_kill_rq(drive, rq);
|
||||
return ide_stopped;
|
||||
}
|
||||
|
||||
if (hwif->tp_ops->read_status(hwif) & (ATA_BUSY | ATA_DRQ))
|
||||
rq->errors |= ERROR_RESET;
|
||||
|
||||
if ((rq->errors & ERROR_RESET) == ERROR_RESET) {
|
||||
++rq->errors;
|
||||
return ide_do_reset(drive);
|
||||
}
|
||||
|
||||
if ((rq->errors & ERROR_RECAL) == ERROR_RECAL)
|
||||
drive->special.b.recalibrate = 1;
|
||||
|
||||
++rq->errors;
|
||||
|
||||
return ide_stopped;
|
||||
}
|
||||
|
||||
static ide_startstop_t ide_atapi_error(ide_drive_t *drive, struct request *rq,
|
||||
u8 stat, u8 err)
|
||||
{
|
||||
ide_hwif_t *hwif = drive->hwif;
|
||||
|
||||
if ((stat & ATA_BUSY) ||
|
||||
((stat & ATA_DF) && (drive->dev_flags & IDE_DFLAG_NOWERR) == 0)) {
|
||||
/* other bits are useless when BUSY */
|
||||
rq->errors |= ERROR_RESET;
|
||||
} else {
|
||||
/* add decoding error stuff */
|
||||
}
|
||||
|
||||
if (hwif->tp_ops->read_status(hwif) & (ATA_BUSY | ATA_DRQ))
|
||||
/* force an abort */
|
||||
hwif->tp_ops->exec_command(hwif, ATA_CMD_IDLEIMMEDIATE);
|
||||
|
||||
if (rq->errors >= ERROR_MAX) {
|
||||
ide_kill_rq(drive, rq);
|
||||
} else {
|
||||
if ((rq->errors & ERROR_RESET) == ERROR_RESET) {
|
||||
++rq->errors;
|
||||
return ide_do_reset(drive);
|
||||
}
|
||||
++rq->errors;
|
||||
}
|
||||
|
||||
return ide_stopped;
|
||||
}
|
||||
|
||||
static ide_startstop_t __ide_error(ide_drive_t *drive, struct request *rq,
|
||||
u8 stat, u8 err)
|
||||
{
|
||||
if (drive->media == ide_disk)
|
||||
return ide_ata_error(drive, rq, stat, err);
|
||||
return ide_atapi_error(drive, rq, stat, err);
|
||||
}
|
||||
|
||||
/**
|
||||
* ide_error - handle an error on the IDE
|
||||
* @drive: drive the error occurred on
|
||||
* @msg: message to report
|
||||
* @stat: status bits
|
||||
*
|
||||
* ide_error() takes action based on the error returned by the drive.
|
||||
* For normal I/O that may well include retries. We deal with
|
||||
* both new-style (taskfile) and old style command handling here.
|
||||
* In the case of taskfile command handling there is work left to
|
||||
* do
|
||||
*/
|
||||
|
||||
ide_startstop_t ide_error(ide_drive_t *drive, const char *msg, u8 stat)
|
||||
{
|
||||
struct request *rq;
|
||||
u8 err;
|
||||
|
||||
err = ide_dump_status(drive, msg, stat);
|
||||
|
||||
rq = drive->hwif->rq;
|
||||
if (rq == NULL)
|
||||
return ide_stopped;
|
||||
|
||||
/* retry only "normal" I/O: */
|
||||
if (!blk_fs_request(rq)) {
|
||||
rq->errors = 1;
|
||||
ide_end_drive_cmd(drive, stat, err);
|
||||
return ide_stopped;
|
||||
}
|
||||
|
||||
return __ide_error(drive, rq, stat, err);
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(ide_error);
|
||||
|
||||
static inline void ide_complete_drive_reset(ide_drive_t *drive, int err)
|
||||
{
|
||||
struct request *rq = drive->hwif->rq;
|
||||
|
||||
if (rq && blk_special_request(rq) && rq->cmd[0] == REQ_DRIVE_RESET)
|
||||
ide_end_request(drive, err ? err : 1, 0);
|
||||
}
|
||||
|
||||
/* needed below */
|
||||
static ide_startstop_t do_reset1(ide_drive_t *, int);
|
||||
|
||||
/*
|
||||
* atapi_reset_pollfunc() gets invoked to poll the interface for completion
|
||||
* every 50ms during an atapi drive reset operation. If the drive has not yet
|
||||
* responded, and we have not yet hit our maximum waiting time, then the timer
|
||||
* is restarted for another 50ms.
|
||||
*/
|
||||
static ide_startstop_t atapi_reset_pollfunc(ide_drive_t *drive)
|
||||
{
|
||||
ide_hwif_t *hwif = drive->hwif;
|
||||
u8 stat;
|
||||
|
||||
SELECT_DRIVE(drive);
|
||||
udelay(10);
|
||||
stat = hwif->tp_ops->read_status(hwif);
|
||||
|
||||
if (OK_STAT(stat, 0, ATA_BUSY))
|
||||
printk(KERN_INFO "%s: ATAPI reset complete\n", drive->name);
|
||||
else {
|
||||
if (time_before(jiffies, hwif->poll_timeout)) {
|
||||
ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20,
|
||||
NULL);
|
||||
/* continue polling */
|
||||
return ide_started;
|
||||
}
|
||||
/* end of polling */
|
||||
hwif->polling = 0;
|
||||
printk(KERN_ERR "%s: ATAPI reset timed-out, status=0x%02x\n",
|
||||
drive->name, stat);
|
||||
/* do it the old fashioned way */
|
||||
return do_reset1(drive, 1);
|
||||
}
|
||||
/* done polling */
|
||||
hwif->polling = 0;
|
||||
ide_complete_drive_reset(drive, 0);
|
||||
return ide_stopped;
|
||||
}
|
||||
|
||||
static void ide_reset_report_error(ide_hwif_t *hwif, u8 err)
|
||||
{
|
||||
static const char *err_master_vals[] =
|
||||
{ NULL, "passed", "formatter device error",
|
||||
"sector buffer error", "ECC circuitry error",
|
||||
"controlling MPU error" };
|
||||
|
||||
u8 err_master = err & 0x7f;
|
||||
|
||||
printk(KERN_ERR "%s: reset: master: ", hwif->name);
|
||||
if (err_master && err_master < 6)
|
||||
printk(KERN_CONT "%s", err_master_vals[err_master]);
|
||||
else
|
||||
printk(KERN_CONT "error (0x%02x?)", err);
|
||||
if (err & 0x80)
|
||||
printk(KERN_CONT "; slave: failed");
|
||||
printk(KERN_CONT "\n");
|
||||
}
|
||||
|
||||
/*
|
||||
* reset_pollfunc() gets invoked to poll the interface for completion every 50ms
|
||||
* during an ide reset operation. If the drives have not yet responded,
|
||||
* and we have not yet hit our maximum waiting time, then the timer is restarted
|
||||
* for another 50ms.
|
||||
*/
|
||||
static ide_startstop_t reset_pollfunc(ide_drive_t *drive)
|
||||
{
|
||||
ide_hwif_t *hwif = drive->hwif;
|
||||
const struct ide_port_ops *port_ops = hwif->port_ops;
|
||||
u8 tmp;
|
||||
int err = 0;
|
||||
|
||||
if (port_ops && port_ops->reset_poll) {
|
||||
err = port_ops->reset_poll(drive);
|
||||
if (err) {
|
||||
printk(KERN_ERR "%s: host reset_poll failure for %s.\n",
|
||||
hwif->name, drive->name);
|
||||
goto out;
|
||||
}
|
||||
}
|
||||
|
||||
tmp = hwif->tp_ops->read_status(hwif);
|
||||
|
||||
if (!OK_STAT(tmp, 0, ATA_BUSY)) {
|
||||
if (time_before(jiffies, hwif->poll_timeout)) {
|
||||
ide_set_handler(drive, &reset_pollfunc, HZ/20, NULL);
|
||||
/* continue polling */
|
||||
return ide_started;
|
||||
}
|
||||
printk(KERN_ERR "%s: reset timed-out, status=0x%02x\n",
|
||||
hwif->name, tmp);
|
||||
drive->failures++;
|
||||
err = -EIO;
|
||||
} else {
|
||||
tmp = ide_read_error(drive);
|
||||
|
||||
if (tmp == 1) {
|
||||
printk(KERN_INFO "%s: reset: success\n", hwif->name);
|
||||
drive->failures = 0;
|
||||
} else {
|
||||
ide_reset_report_error(hwif, tmp);
|
||||
drive->failures++;
|
||||
err = -EIO;
|
||||
}
|
||||
}
|
||||
out:
|
||||
hwif->polling = 0; /* done polling */
|
||||
ide_complete_drive_reset(drive, err);
|
||||
return ide_stopped;
|
||||
}
|
||||
|
||||
static void ide_disk_pre_reset(ide_drive_t *drive)
|
||||
{
|
||||
int legacy = (drive->id[ATA_ID_CFS_ENABLE_2] & 0x0400) ? 0 : 1;
|
||||
|
||||
drive->special.all = 0;
|
||||
drive->special.b.set_geometry = legacy;
|
||||
drive->special.b.recalibrate = legacy;
|
||||
|
||||
drive->mult_count = 0;
|
||||
drive->dev_flags &= ~IDE_DFLAG_PARKED;
|
||||
|
||||
if ((drive->dev_flags & IDE_DFLAG_KEEP_SETTINGS) == 0 &&
|
||||
(drive->dev_flags & IDE_DFLAG_USING_DMA) == 0)
|
||||
drive->mult_req = 0;
|
||||
|
||||
if (drive->mult_req != drive->mult_count)
|
||||
drive->special.b.set_multmode = 1;
|
||||
}
|
||||
|
||||
static void pre_reset(ide_drive_t *drive)
|
||||
{
|
||||
const struct ide_port_ops *port_ops = drive->hwif->port_ops;
|
||||
|
||||
if (drive->media == ide_disk)
|
||||
ide_disk_pre_reset(drive);
|
||||
else
|
||||
drive->dev_flags |= IDE_DFLAG_POST_RESET;
|
||||
|
||||
if (drive->dev_flags & IDE_DFLAG_USING_DMA) {
|
||||
if (drive->crc_count)
|
||||
ide_check_dma_crc(drive);
|
||||
else
|
||||
ide_dma_off(drive);
|
||||
}
|
||||
|
||||
if ((drive->dev_flags & IDE_DFLAG_KEEP_SETTINGS) == 0) {
|
||||
if ((drive->dev_flags & IDE_DFLAG_USING_DMA) == 0) {
|
||||
drive->dev_flags &= ~IDE_DFLAG_UNMASK;
|
||||
drive->io_32bit = 0;
|
||||
}
|
||||
return;
|
||||
}
|
||||
|
||||
if (port_ops && port_ops->pre_reset)
|
||||
port_ops->pre_reset(drive);
|
||||
|
||||
if (drive->current_speed != 0xff)
|
||||
drive->desired_speed = drive->current_speed;
|
||||
drive->current_speed = 0xff;
|
||||
}
|
||||
|
||||
/*
|
||||
* do_reset1() attempts to recover a confused drive by resetting it.
|
||||
* Unfortunately, resetting a disk drive actually resets all devices on
|
||||
* the same interface, so it can really be thought of as resetting the
|
||||
* interface rather than resetting the drive.
|
||||
*
|
||||
* ATAPI devices have their own reset mechanism which allows them to be
|
||||
* individually reset without clobbering other devices on the same interface.
|
||||
*
|
||||
* Unfortunately, the IDE interface does not generate an interrupt to let
|
||||
* us know when the reset operation has finished, so we must poll for this.
|
||||
* Equally poor, though, is the fact that this may a very long time to complete,
|
||||
* (up to 30 seconds worstcase). So, instead of busy-waiting here for it,
|
||||
* we set a timer to poll at 50ms intervals.
|
||||
*/
|
||||
static ide_startstop_t do_reset1(ide_drive_t *drive, int do_not_try_atapi)
|
||||
{
|
||||
ide_hwif_t *hwif = drive->hwif;
|
||||
struct ide_io_ports *io_ports = &hwif->io_ports;
|
||||
const struct ide_tp_ops *tp_ops = hwif->tp_ops;
|
||||
const struct ide_port_ops *port_ops;
|
||||
ide_drive_t *tdrive;
|
||||
unsigned long flags, timeout;
|
||||
int i;
|
||||
DEFINE_WAIT(wait);
|
||||
|
||||
spin_lock_irqsave(&hwif->lock, flags);
|
||||
|
||||
/* We must not reset with running handlers */
|
||||
BUG_ON(hwif->handler != NULL);
|
||||
|
||||
/* For an ATAPI device, first try an ATAPI SRST. */
|
||||
if (drive->media != ide_disk && !do_not_try_atapi) {
|
||||
pre_reset(drive);
|
||||
SELECT_DRIVE(drive);
|
||||
udelay(20);
|
||||
tp_ops->exec_command(hwif, ATA_CMD_DEV_RESET);
|
||||
ndelay(400);
|
||||
hwif->poll_timeout = jiffies + WAIT_WORSTCASE;
|
||||
hwif->polling = 1;
|
||||
__ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20, NULL);
|
||||
spin_unlock_irqrestore(&hwif->lock, flags);
|
||||
return ide_started;
|
||||
}
|
||||
|
||||
/* We must not disturb devices in the IDE_DFLAG_PARKED state. */
|
||||
do {
|
||||
unsigned long now;
|
||||
|
||||
prepare_to_wait(&ide_park_wq, &wait, TASK_UNINTERRUPTIBLE);
|
||||
timeout = jiffies;
|
||||
ide_port_for_each_present_dev(i, tdrive, hwif) {
|
||||
if ((tdrive->dev_flags & IDE_DFLAG_PARKED) &&
|
||||
time_after(tdrive->sleep, timeout))
|
||||
timeout = tdrive->sleep;
|
||||
}
|
||||
|
||||
now = jiffies;
|
||||
if (time_before_eq(timeout, now))
|
||||
break;
|
||||
|
||||
spin_unlock_irqrestore(&hwif->lock, flags);
|
||||
timeout = schedule_timeout_uninterruptible(timeout - now);
|
||||
spin_lock_irqsave(&hwif->lock, flags);
|
||||
} while (timeout);
|
||||
finish_wait(&ide_park_wq, &wait);
|
||||
|
||||
/*
|
||||
* First, reset any device state data we were maintaining
|
||||
* for any of the drives on this interface.
|
||||
*/
|
||||
ide_port_for_each_dev(i, tdrive, hwif)
|
||||
pre_reset(tdrive);
|
||||
|
||||
if (io_ports->ctl_addr == 0) {
|
||||
spin_unlock_irqrestore(&hwif->lock, flags);
|
||||
ide_complete_drive_reset(drive, -ENXIO);
|
||||
return ide_stopped;
|
||||
}
|
||||
|
||||
/*
|
||||
* Note that we also set nIEN while resetting the device,
|
||||
* to mask unwanted interrupts from the interface during the reset.
|
||||
* However, due to the design of PC hardware, this will cause an
|
||||
* immediate interrupt due to the edge transition it produces.
|
||||
* This single interrupt gives us a "fast poll" for drives that
|
||||
* recover from reset very quickly, saving us the first 50ms wait time.
|
||||
*
|
||||
* TODO: add ->softreset method and stop abusing ->set_irq
|
||||
*/
|
||||
/* set SRST and nIEN */
|
||||
tp_ops->set_irq(hwif, 4);
|
||||
/* more than enough time */
|
||||
udelay(10);
|
||||
/* clear SRST, leave nIEN (unless device is on the quirk list) */
|
||||
tp_ops->set_irq(hwif, drive->quirk_list == 2);
|
||||
/* more than enough time */
|
||||
udelay(10);
|
||||
hwif->poll_timeout = jiffies + WAIT_WORSTCASE;
|
||||
hwif->polling = 1;
|
||||
__ide_set_handler(drive, &reset_pollfunc, HZ/20, NULL);
|
||||
|
||||
/*
|
||||
* Some weird controller like resetting themselves to a strange
|
||||
* state when the disks are reset this way. At least, the Winbond
|
||||
* 553 documentation says that
|
||||
*/
|
||||
port_ops = hwif->port_ops;
|
||||
if (port_ops && port_ops->resetproc)
|
||||
port_ops->resetproc(drive);
|
||||
|
||||
spin_unlock_irqrestore(&hwif->lock, flags);
|
||||
return ide_started;
|
||||
}
|
||||
|
||||
/*
|
||||
* ide_do_reset() is the entry point to the drive/interface reset code.
|
||||
*/
|
||||
|
||||
ide_startstop_t ide_do_reset(ide_drive_t *drive)
|
||||
{
|
||||
return do_reset1(drive, 0);
|
||||
}
|
||||
EXPORT_SYMBOL(ide_do_reset);
|
||||
@ -196,7 +196,7 @@ void ide_end_drive_cmd (ide_drive_t *drive, u8 stat, u8 err)
|
||||
}
|
||||
EXPORT_SYMBOL(ide_end_drive_cmd);
|
||||
|
||||
static void ide_kill_rq(ide_drive_t *drive, struct request *rq)
|
||||
void ide_kill_rq(ide_drive_t *drive, struct request *rq)
|
||||
{
|
||||
if (rq->rq_disk) {
|
||||
struct ide_driver *drv;
|
||||
@ -207,133 +207,6 @@ static void ide_kill_rq(ide_drive_t *drive, struct request *rq)
|
||||
ide_end_request(drive, 0, 0);
|
||||
}
|
||||
|
||||
static ide_startstop_t ide_ata_error(ide_drive_t *drive, struct request *rq, u8 stat, u8 err)
|
||||
{
|
||||
ide_hwif_t *hwif = drive->hwif;
|
||||
|
||||
if ((stat & ATA_BUSY) ||
|
||||
((stat & ATA_DF) && (drive->dev_flags & IDE_DFLAG_NOWERR) == 0)) {
|
||||
/* other bits are useless when BUSY */
|
||||
rq->errors |= ERROR_RESET;
|
||||
} else if (stat & ATA_ERR) {
|
||||
/* err has different meaning on cdrom and tape */
|
||||
if (err == ATA_ABORTED) {
|
||||
if ((drive->dev_flags & IDE_DFLAG_LBA) &&
|
||||
/* some newer drives don't support ATA_CMD_INIT_DEV_PARAMS */
|
||||
hwif->tp_ops->read_status(hwif) == ATA_CMD_INIT_DEV_PARAMS)
|
||||
return ide_stopped;
|
||||
} else if ((err & BAD_CRC) == BAD_CRC) {
|
||||
/* UDMA crc error, just retry the operation */
|
||||
drive->crc_count++;
|
||||
} else if (err & (ATA_BBK | ATA_UNC)) {
|
||||
/* retries won't help these */
|
||||
rq->errors = ERROR_MAX;
|
||||
} else if (err & ATA_TRK0NF) {
|
||||
/* help it find track zero */
|
||||
rq->errors |= ERROR_RECAL;
|
||||
}
|
||||
}
|
||||
|
||||
if ((stat & ATA_DRQ) && rq_data_dir(rq) == READ &&
|
||||
(hwif->host_flags & IDE_HFLAG_ERROR_STOPS_FIFO) == 0) {
|
||||
int nsect = drive->mult_count ? drive->mult_count : 1;
|
||||
|
||||
ide_pad_transfer(drive, READ, nsect * SECTOR_SIZE);
|
||||
}
|
||||
|
||||
if (rq->errors >= ERROR_MAX || blk_noretry_request(rq)) {
|
||||
ide_kill_rq(drive, rq);
|
||||
return ide_stopped;
|
||||
}
|
||||
|
||||
if (hwif->tp_ops->read_status(hwif) & (ATA_BUSY | ATA_DRQ))
|
||||
rq->errors |= ERROR_RESET;
|
||||
|
||||
if ((rq->errors & ERROR_RESET) == ERROR_RESET) {
|
||||
++rq->errors;
|
||||
return ide_do_reset(drive);
|
||||
}
|
||||
|
||||
if ((rq->errors & ERROR_RECAL) == ERROR_RECAL)
|
||||
drive->special.b.recalibrate = 1;
|
||||
|
||||
++rq->errors;
|
||||
|
||||
return ide_stopped;
|
||||
}
|
||||
|
||||
static ide_startstop_t ide_atapi_error(ide_drive_t *drive, struct request *rq, u8 stat, u8 err)
|
||||
{
|
||||
ide_hwif_t *hwif = drive->hwif;
|
||||
|
||||
if ((stat & ATA_BUSY) ||
|
||||
((stat & ATA_DF) && (drive->dev_flags & IDE_DFLAG_NOWERR) == 0)) {
|
||||
/* other bits are useless when BUSY */
|
||||
rq->errors |= ERROR_RESET;
|
||||
} else {
|
||||
/* add decoding error stuff */
|
||||
}
|
||||
|
||||
if (hwif->tp_ops->read_status(hwif) & (ATA_BUSY | ATA_DRQ))
|
||||
/* force an abort */
|
||||
hwif->tp_ops->exec_command(hwif, ATA_CMD_IDLEIMMEDIATE);
|
||||
|
||||
if (rq->errors >= ERROR_MAX) {
|
||||
ide_kill_rq(drive, rq);
|
||||
} else {
|
||||
if ((rq->errors & ERROR_RESET) == ERROR_RESET) {
|
||||
++rq->errors;
|
||||
return ide_do_reset(drive);
|
||||
}
|
||||
++rq->errors;
|
||||
}
|
||||
|
||||
return ide_stopped;
|
||||
}
|
||||
|
||||
static ide_startstop_t
|
||||
__ide_error(ide_drive_t *drive, struct request *rq, u8 stat, u8 err)
|
||||
{
|
||||
if (drive->media == ide_disk)
|
||||
return ide_ata_error(drive, rq, stat, err);
|
||||
return ide_atapi_error(drive, rq, stat, err);
|
||||
}
|
||||
|
||||
/**
|
||||
* ide_error - handle an error on the IDE
|
||||
* @drive: drive the error occurred on
|
||||
* @msg: message to report
|
||||
* @stat: status bits
|
||||
*
|
||||
* ide_error() takes action based on the error returned by the drive.
|
||||
* For normal I/O that may well include retries. We deal with
|
||||
* both new-style (taskfile) and old style command handling here.
|
||||
* In the case of taskfile command handling there is work left to
|
||||
* do
|
||||
*/
|
||||
|
||||
ide_startstop_t ide_error (ide_drive_t *drive, const char *msg, u8 stat)
|
||||
{
|
||||
struct request *rq;
|
||||
u8 err;
|
||||
|
||||
err = ide_dump_status(drive, msg, stat);
|
||||
|
||||
rq = drive->hwif->rq;
|
||||
if (rq == NULL)
|
||||
return ide_stopped;
|
||||
|
||||
/* retry only "normal" I/O: */
|
||||
if (!blk_fs_request(rq)) {
|
||||
rq->errors = 1;
|
||||
ide_end_drive_cmd(drive, stat, err);
|
||||
return ide_stopped;
|
||||
}
|
||||
|
||||
return __ide_error(drive, rq, stat, err);
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(ide_error);
|
||||
|
||||
static void ide_tf_set_specify_cmd(ide_drive_t *drive, struct ide_taskfile *tf)
|
||||
{
|
||||
tf->nsect = drive->sect;
|
||||
|
||||
@ -446,8 +446,8 @@ int ide_config_drive_speed(ide_drive_t *drive, u8 speed)
|
||||
*
|
||||
* See also ide_execute_command
|
||||
*/
|
||||
static void __ide_set_handler (ide_drive_t *drive, ide_handler_t *handler,
|
||||
unsigned int timeout, ide_expiry_t *expiry)
|
||||
void __ide_set_handler(ide_drive_t *drive, ide_handler_t *handler,
|
||||
unsigned int timeout, ide_expiry_t *expiry)
|
||||
{
|
||||
ide_hwif_t *hwif = drive->hwif;
|
||||
|
||||
@ -517,301 +517,6 @@ void ide_execute_pkt_cmd(ide_drive_t *drive)
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(ide_execute_pkt_cmd);
|
||||
|
||||
static inline void ide_complete_drive_reset(ide_drive_t *drive, int err)
|
||||
{
|
||||
struct request *rq = drive->hwif->rq;
|
||||
|
||||
if (rq && blk_special_request(rq) && rq->cmd[0] == REQ_DRIVE_RESET)
|
||||
ide_end_request(drive, err ? err : 1, 0);
|
||||
}
|
||||
|
||||
/* needed below */
|
||||
static ide_startstop_t do_reset1(ide_drive_t *, int);
|
||||
|
||||
/*
|
||||
* atapi_reset_pollfunc() gets invoked to poll the interface for completion
|
||||
* every 50ms during an atapi drive reset operation. If the drive has not yet
|
||||
* responded, and we have not yet hit our maximum waiting time, then the timer
|
||||
* is restarted for another 50ms.
|
||||
*/
|
||||
static ide_startstop_t atapi_reset_pollfunc(ide_drive_t *drive)
|
||||
{
|
||||
ide_hwif_t *hwif = drive->hwif;
|
||||
u8 stat;
|
||||
|
||||
SELECT_DRIVE(drive);
|
||||
udelay(10);
|
||||
stat = hwif->tp_ops->read_status(hwif);
|
||||
|
||||
if (OK_STAT(stat, 0, ATA_BUSY))
|
||||
printk(KERN_INFO "%s: ATAPI reset complete\n", drive->name);
|
||||
else {
|
||||
if (time_before(jiffies, hwif->poll_timeout)) {
|
||||
ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20,
|
||||
NULL);
|
||||
/* continue polling */
|
||||
return ide_started;
|
||||
}
|
||||
/* end of polling */
|
||||
hwif->polling = 0;
|
||||
printk(KERN_ERR "%s: ATAPI reset timed-out, status=0x%02x\n",
|
||||
drive->name, stat);
|
||||
/* do it the old fashioned way */
|
||||
return do_reset1(drive, 1);
|
||||
}
|
||||
/* done polling */
|
||||
hwif->polling = 0;
|
||||
ide_complete_drive_reset(drive, 0);
|
||||
return ide_stopped;
|
||||
}
|
||||
|
||||
static void ide_reset_report_error(ide_hwif_t *hwif, u8 err)
|
||||
{
|
||||
static const char *err_master_vals[] =
|
||||
{ NULL, "passed", "formatter device error",
|
||||
"sector buffer error", "ECC circuitry error",
|
||||
"controlling MPU error" };
|
||||
|
||||
u8 err_master = err & 0x7f;
|
||||
|
||||
printk(KERN_ERR "%s: reset: master: ", hwif->name);
|
||||
if (err_master && err_master < 6)
|
||||
printk(KERN_CONT "%s", err_master_vals[err_master]);
|
||||
else
|
||||
printk(KERN_CONT "error (0x%02x?)", err);
|
||||
if (err & 0x80)
|
||||
printk(KERN_CONT "; slave: failed");
|
||||
printk(KERN_CONT "\n");
|
||||
}
|
||||
|
||||
/*
|
||||
* reset_pollfunc() gets invoked to poll the interface for completion every 50ms
|
||||
* during an ide reset operation. If the drives have not yet responded,
|
||||
* and we have not yet hit our maximum waiting time, then the timer is restarted
|
||||
* for another 50ms.
|
||||
*/
|
||||
static ide_startstop_t reset_pollfunc(ide_drive_t *drive)
|
||||
{
|
||||
ide_hwif_t *hwif = drive->hwif;
|
||||
const struct ide_port_ops *port_ops = hwif->port_ops;
|
||||
u8 tmp;
|
||||
int err = 0;
|
||||
|
||||
if (port_ops && port_ops->reset_poll) {
|
||||
err = port_ops->reset_poll(drive);
|
||||
if (err) {
|
||||
printk(KERN_ERR "%s: host reset_poll failure for %s.\n",
|
||||
hwif->name, drive->name);
|
||||
goto out;
|
||||
}
|
||||
}
|
||||
|
||||
tmp = hwif->tp_ops->read_status(hwif);
|
||||
|
||||
if (!OK_STAT(tmp, 0, ATA_BUSY)) {
|
||||
if (time_before(jiffies, hwif->poll_timeout)) {
|
||||
ide_set_handler(drive, &reset_pollfunc, HZ/20, NULL);
|
||||
/* continue polling */
|
||||
return ide_started;
|
||||
}
|
||||
printk(KERN_ERR "%s: reset timed-out, status=0x%02x\n",
|
||||
hwif->name, tmp);
|
||||
drive->failures++;
|
||||
err = -EIO;
|
||||
} else {
|
||||
tmp = ide_read_error(drive);
|
||||
|
||||
if (tmp == 1) {
|
||||
printk(KERN_INFO "%s: reset: success\n", hwif->name);
|
||||
drive->failures = 0;
|
||||
} else {
|
||||
ide_reset_report_error(hwif, tmp);
|
||||
drive->failures++;
|
||||
err = -EIO;
|
||||
}
|
||||
}
|
||||
out:
|
||||
hwif->polling = 0; /* done polling */
|
||||
ide_complete_drive_reset(drive, err);
|
||||
return ide_stopped;
|
||||
}
|
||||
|
||||
static void ide_disk_pre_reset(ide_drive_t *drive)
|
||||
{
|
||||
int legacy = (drive->id[ATA_ID_CFS_ENABLE_2] & 0x0400) ? 0 : 1;
|
||||
|
||||
drive->special.all = 0;
|
||||
drive->special.b.set_geometry = legacy;
|
||||
drive->special.b.recalibrate = legacy;
|
||||
|
||||
drive->mult_count = 0;
|
||||
drive->dev_flags &= ~IDE_DFLAG_PARKED;
|
||||
|
||||
if ((drive->dev_flags & IDE_DFLAG_KEEP_SETTINGS) == 0 &&
|
||||
(drive->dev_flags & IDE_DFLAG_USING_DMA) == 0)
|
||||
drive->mult_req = 0;
|
||||
|
||||
if (drive->mult_req != drive->mult_count)
|
||||
drive->special.b.set_multmode = 1;
|
||||
}
|
||||
|
||||
static void pre_reset(ide_drive_t *drive)
|
||||
{
|
||||
const struct ide_port_ops *port_ops = drive->hwif->port_ops;
|
||||
|
||||
if (drive->media == ide_disk)
|
||||
ide_disk_pre_reset(drive);
|
||||
else
|
||||
drive->dev_flags |= IDE_DFLAG_POST_RESET;
|
||||
|
||||
if (drive->dev_flags & IDE_DFLAG_USING_DMA) {
|
||||
if (drive->crc_count)
|
||||
ide_check_dma_crc(drive);
|
||||
else
|
||||
ide_dma_off(drive);
|
||||
}
|
||||
|
||||
if ((drive->dev_flags & IDE_DFLAG_KEEP_SETTINGS) == 0) {
|
||||
if ((drive->dev_flags & IDE_DFLAG_USING_DMA) == 0) {
|
||||
drive->dev_flags &= ~IDE_DFLAG_UNMASK;
|
||||
drive->io_32bit = 0;
|
||||
}
|
||||
return;
|
||||
}
|
||||
|
||||
if (port_ops && port_ops->pre_reset)
|
||||
port_ops->pre_reset(drive);
|
||||
|
||||
if (drive->current_speed != 0xff)
|
||||
drive->desired_speed = drive->current_speed;
|
||||
drive->current_speed = 0xff;
|
||||
}
|
||||
|
||||
/*
|
||||
* do_reset1() attempts to recover a confused drive by resetting it.
|
||||
* Unfortunately, resetting a disk drive actually resets all devices on
|
||||
* the same interface, so it can really be thought of as resetting the
|
||||
* interface rather than resetting the drive.
|
||||
*
|
||||
* ATAPI devices have their own reset mechanism which allows them to be
|
||||
* individually reset without clobbering other devices on the same interface.
|
||||
*
|
||||
* Unfortunately, the IDE interface does not generate an interrupt to let
|
||||
* us know when the reset operation has finished, so we must poll for this.
|
||||
* Equally poor, though, is the fact that this may a very long time to complete,
|
||||
* (up to 30 seconds worstcase). So, instead of busy-waiting here for it,
|
||||
* we set a timer to poll at 50ms intervals.
|
||||
*/
|
||||
static ide_startstop_t do_reset1(ide_drive_t *drive, int do_not_try_atapi)
|
||||
{
|
||||
ide_hwif_t *hwif = drive->hwif;
|
||||
struct ide_io_ports *io_ports = &hwif->io_ports;
|
||||
const struct ide_tp_ops *tp_ops = hwif->tp_ops;
|
||||
const struct ide_port_ops *port_ops;
|
||||
ide_drive_t *tdrive;
|
||||
unsigned long flags, timeout;
|
||||
int i;
|
||||
DEFINE_WAIT(wait);
|
||||
|
||||
spin_lock_irqsave(&hwif->lock, flags);
|
||||
|
||||
/* We must not reset with running handlers */
|
||||
BUG_ON(hwif->handler != NULL);
|
||||
|
||||
/* For an ATAPI device, first try an ATAPI SRST. */
|
||||
if (drive->media != ide_disk && !do_not_try_atapi) {
|
||||
pre_reset(drive);
|
||||
SELECT_DRIVE(drive);
|
||||
udelay(20);
|
||||
tp_ops->exec_command(hwif, ATA_CMD_DEV_RESET);
|
||||
ndelay(400);
|
||||
hwif->poll_timeout = jiffies + WAIT_WORSTCASE;
|
||||
hwif->polling = 1;
|
||||
__ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20, NULL);
|
||||
spin_unlock_irqrestore(&hwif->lock, flags);
|
||||
return ide_started;
|
||||
}
|
||||
|
||||
/* We must not disturb devices in the IDE_DFLAG_PARKED state. */
|
||||
do {
|
||||
unsigned long now;
|
||||
|
||||
prepare_to_wait(&ide_park_wq, &wait, TASK_UNINTERRUPTIBLE);
|
||||
timeout = jiffies;
|
||||
ide_port_for_each_present_dev(i, tdrive, hwif) {
|
||||
if ((tdrive->dev_flags & IDE_DFLAG_PARKED) &&
|
||||
time_after(tdrive->sleep, timeout))
|
||||
timeout = tdrive->sleep;
|
||||
}
|
||||
|
||||
now = jiffies;
|
||||
if (time_before_eq(timeout, now))
|
||||
break;
|
||||
|
||||
spin_unlock_irqrestore(&hwif->lock, flags);
|
||||
timeout = schedule_timeout_uninterruptible(timeout - now);
|
||||
spin_lock_irqsave(&hwif->lock, flags);
|
||||
} while (timeout);
|
||||
finish_wait(&ide_park_wq, &wait);
|
||||
|
||||
/*
|
||||
* First, reset any device state data we were maintaining
|
||||
* for any of the drives on this interface.
|
||||
*/
|
||||
ide_port_for_each_dev(i, tdrive, hwif)
|
||||
pre_reset(tdrive);
|
||||
|
||||
if (io_ports->ctl_addr == 0) {
|
||||
spin_unlock_irqrestore(&hwif->lock, flags);
|
||||
ide_complete_drive_reset(drive, -ENXIO);
|
||||
return ide_stopped;
|
||||
}
|
||||
|
||||
/*
|
||||
* Note that we also set nIEN while resetting the device,
|
||||
* to mask unwanted interrupts from the interface during the reset.
|
||||
* However, due to the design of PC hardware, this will cause an
|
||||
* immediate interrupt due to the edge transition it produces.
|
||||
* This single interrupt gives us a "fast poll" for drives that
|
||||
* recover from reset very quickly, saving us the first 50ms wait time.
|
||||
*
|
||||
* TODO: add ->softreset method and stop abusing ->set_irq
|
||||
*/
|
||||
/* set SRST and nIEN */
|
||||
tp_ops->set_irq(hwif, 4);
|
||||
/* more than enough time */
|
||||
udelay(10);
|
||||
/* clear SRST, leave nIEN (unless device is on the quirk list) */
|
||||
tp_ops->set_irq(hwif, drive->quirk_list == 2);
|
||||
/* more than enough time */
|
||||
udelay(10);
|
||||
hwif->poll_timeout = jiffies + WAIT_WORSTCASE;
|
||||
hwif->polling = 1;
|
||||
__ide_set_handler(drive, &reset_pollfunc, HZ/20, NULL);
|
||||
|
||||
/*
|
||||
* Some weird controller like resetting themselves to a strange
|
||||
* state when the disks are reset this way. At least, the Winbond
|
||||
* 553 documentation says that
|
||||
*/
|
||||
port_ops = hwif->port_ops;
|
||||
if (port_ops && port_ops->resetproc)
|
||||
port_ops->resetproc(drive);
|
||||
|
||||
spin_unlock_irqrestore(&hwif->lock, flags);
|
||||
return ide_started;
|
||||
}
|
||||
|
||||
/*
|
||||
* ide_do_reset() is the entry point to the drive/interface reset code.
|
||||
*/
|
||||
|
||||
ide_startstop_t ide_do_reset(ide_drive_t *drive)
|
||||
{
|
||||
return do_reset1(drive, 0);
|
||||
}
|
||||
EXPORT_SYMBOL(ide_do_reset);
|
||||
|
||||
/*
|
||||
* ide_wait_not_busy() waits for the currently selected device on the hwif
|
||||
* to report a non-busy status, see comments in ide_probe_port().
|
||||
|
||||
@ -1146,11 +1146,14 @@ int generic_ide_ioctl(ide_drive_t *, struct block_device *, unsigned, unsigned l
|
||||
extern int ide_vlb_clk;
|
||||
extern int ide_pci_clk;
|
||||
|
||||
extern int ide_end_request (ide_drive_t *drive, int uptodate, int nrsecs);
|
||||
int ide_end_dequeued_request(ide_drive_t *drive, struct request *rq,
|
||||
int uptodate, int nr_sectors);
|
||||
int ide_end_request(ide_drive_t *, int, int);
|
||||
int ide_end_dequeued_request(ide_drive_t *, struct request *, int, int);
|
||||
void ide_kill_rq(ide_drive_t *, struct request *);
|
||||
|
||||
extern void ide_set_handler (ide_drive_t *drive, ide_handler_t *handler, unsigned int timeout, ide_expiry_t *expiry);
|
||||
void __ide_set_handler(ide_drive_t *, ide_handler_t *, unsigned int,
|
||||
ide_expiry_t *);
|
||||
void ide_set_handler(ide_drive_t *, ide_handler_t *, unsigned int,
|
||||
ide_expiry_t *);
|
||||
|
||||
void ide_execute_command(ide_drive_t *, u8, ide_handler_t *, unsigned int,
|
||||
ide_expiry_t *);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user