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block: move PM request support to IDE

Browse source 
This removes the request types and hacks from the block code and into the
old IDE driver.  There is a small amunt of code duplication due to this,
but it's not too bad.

Signed-off-by: Christoph Hellwig <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
This commit is contained in:
Christoph Hellwig 2015-04-17 22:37:20 +02:00 • committed by Jens Axboe
commit a7928c1578
9 changed files with 70 additions and 51 deletions
Download patch file Download diff file Expand all files Collapse all files

2
drivers/ide/ide-eh.c
View file

@ -129,7 +129,7 @@ ide_startstop_t ide_error(ide_drive_t *drive, const char *msg, u8 stat)
if (cmd)
ide_complete_cmd(drive, cmd, stat, err);
} else if (blk_pm_request(rq)) {
} else if (ata_pm_request(rq)) {
rq->errors = 1;
ide_complete_pm_rq(drive, rq);
return ide_stopped;

8
drivers/ide/ide-io.c
View file

@ -320,7 +320,7 @@ static ide_startstop_t start_request (ide_drive_t *drive, struct request *rq)
goto kill_rq;
}
if (blk_pm_request(rq))
if (ata_pm_request(rq))
ide_check_pm_state(drive, rq);
drive->hwif->tp_ops->dev_select(drive);
@ -342,8 +342,8 @@ static ide_startstop_t start_request (ide_drive_t *drive, struct request *rq)
if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE)
return execute_drive_cmd(drive, rq);
else if (blk_pm_request(rq)) {
struct request_pm_state *pm = rq->special;
else if (ata_pm_request(rq)) {
struct ide_pm_state *pm = rq->special;
#ifdef DEBUG_PM
printk("%s: start_power_step(step: %d)\n",
drive->name, pm->pm_step);
@ -538,7 +538,7 @@ repeat:
* state machine.
*/
if ((drive->dev_flags & IDE_DFLAG_BLOCKED) &&
blk_pm_request(rq) == 0 &&
ata_pm_request(rq) == 0 &&
(rq->cmd_flags & REQ_PREEMPT) == 0) {
/* there should be no pending command at this point */
ide_unlock_port(hwif);

56
drivers/ide/ide-pm.c
View file

@ -8,7 +8,7 @@ int generic_ide_suspend(struct device *dev, pm_message_t mesg)
ide_drive_t *pair = ide_get_pair_dev(drive);
ide_hwif_t *hwif = drive->hwif;
struct request *rq;
struct request_pm_state rqpm;
struct ide_pm_state rqpm;
int ret;
if (ide_port_acpi(hwif)) {
@ -19,7 +19,7 @@ int generic_ide_suspend(struct device *dev, pm_message_t mesg)
memset(&rqpm, 0, sizeof(rqpm));
rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
rq->cmd_type = REQ_TYPE_PM_SUSPEND;
rq->cmd_type = REQ_TYPE_ATA_PM_SUSPEND;
rq->special = &rqpm;
rqpm.pm_step = IDE_PM_START_SUSPEND;
if (mesg.event == PM_EVENT_PRETHAW)
@ -38,13 +38,43 @@ int generic_ide_suspend(struct device *dev, pm_message_t mesg)
return ret;
}
static void ide_end_sync_rq(struct request *rq, int error)
{
complete(rq->end_io_data);
}
static int ide_pm_execute_rq(struct request *rq)
{
struct request_queue *q = rq->q;
DECLARE_COMPLETION_ONSTACK(wait);
rq->end_io_data = &wait;
rq->end_io = ide_end_sync_rq;
spin_lock_irq(q->queue_lock);
if (unlikely(blk_queue_dying(q))) {
rq->cmd_flags |= REQ_QUIET;
rq->errors = -ENXIO;
__blk_end_request_all(rq, rq->errors);
spin_unlock_irq(q->queue_lock);
return -ENXIO;
}
__elv_add_request(q, rq, ELEVATOR_INSERT_FRONT);
__blk_run_queue_uncond(q);
spin_unlock_irq(q->queue_lock);
wait_for_completion_io(&wait);
return rq->errors ? -EIO : 0;
}
int generic_ide_resume(struct device *dev)
{
ide_drive_t *drive = to_ide_device(dev);
ide_drive_t *pair = ide_get_pair_dev(drive);
ide_hwif_t *hwif = drive->hwif;
struct request *rq;
struct request_pm_state rqpm;
struct ide_pm_state rqpm;
int err;
if (ide_port_acpi(hwif)) {
@ -59,13 +89,13 @@ int generic_ide_resume(struct device *dev)
memset(&rqpm, 0, sizeof(rqpm));
rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
rq->cmd_type = REQ_TYPE_PM_RESUME;
rq->cmd_type = REQ_TYPE_ATA_PM_RESUME;
rq->cmd_flags |= REQ_PREEMPT;
rq->special = &rqpm;
rqpm.pm_step = IDE_PM_START_RESUME;
rqpm.pm_state = PM_EVENT_ON;
err = blk_execute_rq(drive->queue, NULL, rq, 1);
err = ide_pm_execute_rq(rq);
blk_put_request(rq);
if (err == 0 && dev->driver) {
@ -80,7 +110,7 @@ int generic_ide_resume(struct device *dev)
void ide_complete_power_step(ide_drive_t *drive, struct request *rq)
{
struct request_pm_state *pm = rq->special;
struct ide_pm_state *pm = rq->special;
#ifdef DEBUG_PM
printk(KERN_INFO "%s: complete_power_step(step: %d)\n",
@ -110,7 +140,7 @@ void ide_complete_power_step(ide_drive_t *drive, struct request *rq)
ide_startstop_t ide_start_power_step(ide_drive_t *drive, struct request *rq)
{
struct request_pm_state *pm = rq->special;
struct ide_pm_state *pm = rq->special;
struct ide_cmd cmd = { };
switch (pm->pm_step) {
@ -182,7 +212,7 @@ out_do_tf:
void ide_complete_pm_rq(ide_drive_t *drive, struct request *rq)
{
struct request_queue *q = drive->queue;
struct request_pm_state *pm = rq->special;
struct ide_pm_state *pm = rq->special;
unsigned long flags;
ide_complete_power_step(drive, rq);
@ -191,10 +221,10 @@ void ide_complete_pm_rq(ide_drive_t *drive, struct request *rq)
#ifdef DEBUG_PM
printk("%s: completing PM request, %s\n", drive->name,
(rq->cmd_type == REQ_TYPE_PM_SUSPEND) ? "suspend" : "resume");
(rq->cmd_type == REQ_TYPE_ATA_PM_SUSPEND) ? "suspend" : "resume");
#endif
spin_lock_irqsave(q->queue_lock, flags);
if (rq->cmd_type == REQ_TYPE_PM_SUSPEND)
if (rq->cmd_type == REQ_TYPE_ATA_PM_SUSPEND)
blk_stop_queue(q);
else
drive->dev_flags &= ~IDE_DFLAG_BLOCKED;
@ -208,13 +238,13 @@ void ide_complete_pm_rq(ide_drive_t *drive, struct request *rq)
void ide_check_pm_state(ide_drive_t *drive, struct request *rq)
{
struct request_pm_state *pm = rq->special;
struct ide_pm_state *pm = rq->special;
if (rq->cmd_type == REQ_TYPE_PM_SUSPEND &&
if (rq->cmd_type == REQ_TYPE_ATA_PM_SUSPEND &&
pm->pm_step == IDE_PM_START_SUSPEND)
/* Mark drive blocked when starting the suspend sequence. */
drive->dev_flags |= IDE_DFLAG_BLOCKED;
else if (rq->cmd_type == REQ_TYPE_PM_RESUME &&
else if (rq->cmd_type == REQ_TYPE_ATA_PM_RESUME &&
pm->pm_step == IDE_PM_START_RESUME) {
/*
* The first thing we do on wakeup is to wait for BSY bit to

2
drivers/ide/ide-taskfile.c
View file

@ -186,7 +186,7 @@ static ide_startstop_t task_no_data_intr(ide_drive_t *drive)
tf->command == ATA_CMD_CHK_POWER) {
struct request *rq = hwif->rq;
if (blk_pm_request(rq))
if (ata_pm_request(rq))
ide_complete_pm_rq(drive, rq);
else
ide_finish_cmd(drive, cmd, stat);