853280a4dc
blk_start_queueing() is being phased out in favor of [__]blk_run_queue(). Switch. Signed-off-by: Tejun Heo <tj@kernel.org>
149 lines
3.4 KiB
C
149 lines
3.4 KiB
C
#include <linux/kernel.h>
|
|
#include <linux/ide.h>
|
|
#include <linux/jiffies.h>
|
|
#include <linux/blkdev.h>
|
|
|
|
DECLARE_WAIT_QUEUE_HEAD(ide_park_wq);
|
|
|
|
static void issue_park_cmd(ide_drive_t *drive, unsigned long timeout)
|
|
{
|
|
ide_hwif_t *hwif = drive->hwif;
|
|
struct request_queue *q = drive->queue;
|
|
struct request *rq;
|
|
int rc;
|
|
|
|
timeout += jiffies;
|
|
spin_lock_irq(&hwif->lock);
|
|
if (drive->dev_flags & IDE_DFLAG_PARKED) {
|
|
int reset_timer = time_before(timeout, drive->sleep);
|
|
int start_queue = 0;
|
|
|
|
drive->sleep = timeout;
|
|
wake_up_all(&ide_park_wq);
|
|
if (reset_timer && del_timer(&hwif->timer))
|
|
start_queue = 1;
|
|
spin_unlock_irq(&hwif->lock);
|
|
|
|
if (start_queue)
|
|
blk_run_queue(q);
|
|
return;
|
|
}
|
|
spin_unlock_irq(&hwif->lock);
|
|
|
|
rq = blk_get_request(q, READ, __GFP_WAIT);
|
|
rq->cmd[0] = REQ_PARK_HEADS;
|
|
rq->cmd_len = 1;
|
|
rq->cmd_type = REQ_TYPE_SPECIAL;
|
|
rq->special = &timeout;
|
|
rc = blk_execute_rq(q, NULL, rq, 1);
|
|
blk_put_request(rq);
|
|
if (rc)
|
|
goto out;
|
|
|
|
/*
|
|
* Make sure that *some* command is sent to the drive after the
|
|
* timeout has expired, so power management will be reenabled.
|
|
*/
|
|
rq = blk_get_request(q, READ, GFP_NOWAIT);
|
|
if (unlikely(!rq))
|
|
goto out;
|
|
|
|
rq->cmd[0] = REQ_UNPARK_HEADS;
|
|
rq->cmd_len = 1;
|
|
rq->cmd_type = REQ_TYPE_SPECIAL;
|
|
elv_add_request(q, rq, ELEVATOR_INSERT_FRONT, 1);
|
|
|
|
out:
|
|
return;
|
|
}
|
|
|
|
ide_startstop_t ide_do_park_unpark(ide_drive_t *drive, struct request *rq)
|
|
{
|
|
struct ide_cmd cmd;
|
|
struct ide_taskfile *tf = &cmd.tf;
|
|
|
|
memset(&cmd, 0, sizeof(cmd));
|
|
if (rq->cmd[0] == REQ_PARK_HEADS) {
|
|
drive->sleep = *(unsigned long *)rq->special;
|
|
drive->dev_flags |= IDE_DFLAG_SLEEPING;
|
|
tf->command = ATA_CMD_IDLEIMMEDIATE;
|
|
tf->feature = 0x44;
|
|
tf->lbal = 0x4c;
|
|
tf->lbam = 0x4e;
|
|
tf->lbah = 0x55;
|
|
cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
|
|
cmd.valid.in.tf = IDE_VALID_IN_TF | IDE_VALID_DEVICE;
|
|
} else /* cmd == REQ_UNPARK_HEADS */
|
|
tf->command = ATA_CMD_CHK_POWER;
|
|
|
|
cmd.tf_flags |= IDE_TFLAG_CUSTOM_HANDLER;
|
|
cmd.protocol = ATA_PROT_NODATA;
|
|
|
|
cmd.rq = rq;
|
|
|
|
return do_rw_taskfile(drive, &cmd);
|
|
}
|
|
|
|
ssize_t ide_park_show(struct device *dev, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
ide_drive_t *drive = to_ide_device(dev);
|
|
ide_hwif_t *hwif = drive->hwif;
|
|
unsigned long now;
|
|
unsigned int msecs;
|
|
|
|
if (drive->dev_flags & IDE_DFLAG_NO_UNLOAD)
|
|
return -EOPNOTSUPP;
|
|
|
|
spin_lock_irq(&hwif->lock);
|
|
now = jiffies;
|
|
if (drive->dev_flags & IDE_DFLAG_PARKED &&
|
|
time_after(drive->sleep, now))
|
|
msecs = jiffies_to_msecs(drive->sleep - now);
|
|
else
|
|
msecs = 0;
|
|
spin_unlock_irq(&hwif->lock);
|
|
|
|
return snprintf(buf, 20, "%u\n", msecs);
|
|
}
|
|
|
|
ssize_t ide_park_store(struct device *dev, struct device_attribute *attr,
|
|
const char *buf, size_t len)
|
|
{
|
|
#define MAX_PARK_TIMEOUT 30000
|
|
ide_drive_t *drive = to_ide_device(dev);
|
|
long int input;
|
|
int rc;
|
|
|
|
rc = strict_strtol(buf, 10, &input);
|
|
if (rc || input < -2)
|
|
return -EINVAL;
|
|
if (input > MAX_PARK_TIMEOUT) {
|
|
input = MAX_PARK_TIMEOUT;
|
|
rc = -EOVERFLOW;
|
|
}
|
|
|
|
mutex_lock(&ide_setting_mtx);
|
|
if (input >= 0) {
|
|
if (drive->dev_flags & IDE_DFLAG_NO_UNLOAD)
|
|
rc = -EOPNOTSUPP;
|
|
else if (input || drive->dev_flags & IDE_DFLAG_PARKED)
|
|
issue_park_cmd(drive, msecs_to_jiffies(input));
|
|
} else {
|
|
if (drive->media == ide_disk)
|
|
switch (input) {
|
|
case -1:
|
|
drive->dev_flags &= ~IDE_DFLAG_NO_UNLOAD;
|
|
break;
|
|
case -2:
|
|
drive->dev_flags |= IDE_DFLAG_NO_UNLOAD;
|
|
break;
|
|
}
|
|
else
|
|
rc = -EOPNOTSUPP;
|
|
}
|
|
mutex_unlock(&ide_setting_mtx);
|
|
|
|
return rc ? rc : len;
|
|
}
|