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Commit 0d346ba0 authored by Bartlomiej Zolnierkiewicz's avatar Bartlomiej Zolnierkiewicz
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ide: sanitize ide*_pm_* enums 

* Move ide*_pm_* enums from ide-io.c to <linux/ide.h>.

* idedisk_pm_* -> ide_pm_*

* ide_pm_state_* -> ide_pm_*

* No need to set ide_pm_* enums to the fixed values.

* Uppercase ide_pm_* enums.

* Fix/update comments.
Signed-off-by: default avatarBartlomiej Zolnierkiewicz <bzolnier@gmail.com>
parent d1d76714
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Showing with 40 additions and 60 deletions
drivers/ide/ide-io.c
View file @ 0d346ba0
......@@ -132,21 +132,6 @@ int ide_end_request (ide_drive_t *drive, int uptodate, int nr_sectors)
}
EXPORT_SYMBOL(ide_end_request);
/*
* Power Management state machine. This one is rather trivial for now,
* we should probably add more, like switching back to PIO on suspend
* to help some BIOSes, re-do the door locking on resume, etc...
*/
enum {
ide_pm_flush_cache = ide_pm_state_start_suspend,
idedisk_pm_standby,
idedisk_pm_restore_pio = ide_pm_state_start_resume,
idedisk_pm_idle,
ide_pm_restore_dma,
};
static void ide_complete_power_step(ide_drive_t *drive, struct request *rq, u8 stat, u8 error)
{
struct request_pm_state *pm = rq->data;
......@@ -155,20 +140,20 @@ static void ide_complete_power_step(ide_drive_t *drive, struct request *rq, u8 s
return;
switch (pm->pm_step) {
case ide_pm_flush_cache: /* Suspend step 1 (flush cache) complete */
case IDE_PM_FLUSH_CACHE: /* Suspend step 1 (flush cache) */
if (pm->pm_state == PM_EVENT_FREEZE)
pm->pm_step = ide_pm_state_completed;
pm->pm_step = IDE_PM_COMPLETED;
else
pm->pm_step = idedisk_pm_standby;
pm->pm_step = IDE_PM_STANDBY;
break;
case idedisk_pm_standby: /* Suspend step 2 (standby) complete */
pm->pm_step = ide_pm_state_completed;
case IDE_PM_STANDBY: /* Suspend step 2 (standby) */
pm->pm_step = IDE_PM_COMPLETED;
break;
case idedisk_pm_restore_pio: /* Resume step 1 complete */
pm->pm_step = idedisk_pm_idle;
case IDE_PM_RESTORE_PIO: /* Resume step 1 (restore PIO) */
pm->pm_step = IDE_PM_IDLE;
break;
case idedisk_pm_idle: /* Resume step 2 (idle) complete */
pm->pm_step = ide_pm_restore_dma;
case IDE_PM_IDLE: /* Resume step 2 (idle)*/
pm->pm_step = IDE_PM_RESTORE_DMA;
break;
}
}
......@@ -181,7 +166,7 @@ static ide_startstop_t ide_start_power_step(ide_drive_t *drive, struct request *
memset(args, 0, sizeof(*args));
switch (pm->pm_step) {
case ide_pm_flush_cache: /* Suspend step 1 (flush cache) */
case IDE_PM_FLUSH_CACHE: /* Suspend step 1 (flush cache) */
if (drive->media != ide_disk)
break;
/* Not supported? Switch to next step now. */
......@@ -195,27 +180,23 @@ static ide_startstop_t ide_start_power_step(ide_drive_t *drive, struct request *
else
args->tf.command = ATA_CMD_FLUSH;
goto out_do_tf;
case idedisk_pm_standby: /* Suspend step 2 (standby) */
case IDE_PM_STANDBY: /* Suspend step 2 (standby) */
args->tf.command = ATA_CMD_STANDBYNOW1;
goto out_do_tf;
case idedisk_pm_restore_pio: /* Resume step 1 (restore PIO) */
case IDE_PM_RESTORE_PIO: /* Resume step 1 (restore PIO) */
ide_set_max_pio(drive);
/*
* skip idedisk_pm_idle for ATAPI devices
* skip IDE_PM_IDLE for ATAPI devices
*/
if (drive->media != ide_disk)
pm->pm_step = ide_pm_restore_dma;
pm->pm_step = IDE_PM_RESTORE_DMA;
else
ide_complete_power_step(drive, rq, 0, 0);
return ide_stopped;
case idedisk_pm_idle: /* Resume step 2 (idle) */
case IDE_PM_IDLE: /* Resume step 2 (idle) */
args->tf.command = ATA_CMD_IDLEIMMEDIATE;
goto out_do_tf;
case ide_pm_restore_dma: /* Resume step 3 (restore DMA) */
case IDE_PM_RESTORE_DMA: /* Resume step 3 (restore DMA) */
/*
* Right now, all we do is call ide_set_dma(drive),
* we could be smarter and check for current xfer_speed
......@@ -229,7 +210,8 @@ static ide_startstop_t ide_start_power_step(ide_drive_t *drive, struct request *
ide_set_dma(drive);
break;
}
pm->pm_step = ide_pm_state_completed;
pm->pm_step = IDE_PM_COMPLETED;
return ide_stopped;
out_do_tf:
......@@ -345,7 +327,7 @@ void ide_end_drive_cmd (ide_drive_t *drive, u8 stat, u8 err)
drive->name, rq->pm->pm_step, stat, err);
#endif
ide_complete_power_step(drive, rq, stat, err);
if (pm->pm_step == ide_pm_state_completed)
if (pm->pm_step == IDE_PM_COMPLETED)
ide_complete_pm_request(drive, rq);
return;
}
......@@ -778,11 +760,11 @@ static void ide_check_pm_state(ide_drive_t *drive, struct request *rq)
struct request_pm_state *pm = rq->data;
if (blk_pm_suspend_request(rq) &&
pm->pm_step == ide_pm_state_start_suspend)
pm->pm_step == IDE_PM_START_SUSPEND)
/* Mark drive blocked when starting the suspend sequence. */
drive->dev_flags |= IDE_DFLAG_BLOCKED;
else if (blk_pm_resume_request(rq) &&
pm->pm_step == ide_pm_state_start_resume) {
pm->pm_step == IDE_PM_START_RESUME) {
/*
* The first thing we do on wakeup is to wait for BSY bit to
* go away (with a looong timeout) as a drive on this hwif may
......@@ -862,7 +844,7 @@ static ide_startstop_t start_request (ide_drive_t *drive, struct request *rq)
#endif
startstop = ide_start_power_step(drive, rq);
if (startstop == ide_stopped &&
pm->pm_step == ide_pm_state_completed)
pm->pm_step == IDE_PM_COMPLETED)
ide_complete_pm_request(drive, rq);
return startstop;
} else if (!rq->rq_disk && blk_special_request(rq))
......
drivers/ide/ide.c
View file @ 0d346ba0
......@@ -388,7 +388,7 @@ static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
rq->cmd_type = REQ_TYPE_PM_SUSPEND;
rq->special = &args;
rq->data = &rqpm;
rqpm.pm_step = ide_pm_state_start_suspend;
rqpm.pm_step = IDE_PM_START_SUSPEND;
if (mesg.event == PM_EVENT_PRETHAW)
mesg.event = PM_EVENT_FREEZE;
rqpm.pm_state = mesg.event;
......@@ -427,7 +427,7 @@ static int generic_ide_resume(struct device *dev)
rq->cmd_flags |= REQ_PREEMPT;
rq->special = &args;
rq->data = &rqpm;
rqpm.pm_step = ide_pm_state_start_resume;
rqpm.pm_step = IDE_PM_START_RESUME;
rqpm.pm_state = PM_EVENT_ON;
err = blk_execute_rq(drive->queue, NULL, rq, 1);
......
include/linux/ide.h
View file @ 0d346ba0
......@@ -988,36 +988,34 @@ enum {
}
/*
* Power Management step value (rq->pm->pm_step).
* Power Management state machine (rq->pm->pm_step).
*
* The step value starts at 0 (ide_pm_state_start_suspend) for a
* suspend operation or 1000 (ide_pm_state_start_resume) for a
* resume operation.
*
* For each step, the core calls the subdriver start_power_step() first.
* For each step, the core calls ide_start_power_step() first.
* This can return:
* - ide_stopped : In this case, the core calls us back again unless
* step have been set to ide_power_state_completed.
* - ide_started : In this case, the channel is left busy until an
* async event (interrupt) occurs.
* Typically, start_power_step() will issue a taskfile request with
* Typically, ide_start_power_step() will issue a taskfile request with
* do_rw_taskfile().
*
* Upon reception of the interrupt, the core will call complete_power_step()
* Upon reception of the interrupt, the core will call ide_complete_power_step()
* with the error code if any. This routine should update the step value
* and return. It should not start a new request. The core will call
* start_power_step for the new step value, unless step have been set to
* ide_power_state_completed.
*
* Subdrivers are expected to define their own additional power
* steps from 1..999 for suspend and from 1001..1999 for resume,
* other values are reserved for future use.
* ide_start_power_step() for the new step value, unless step have been
* set to IDE_PM_COMPLETED.
*/
enum {
ide_pm_state_completed = -1,
ide_pm_state_start_suspend = 0,
ide_pm_state_start_resume = 1000,
IDE_PM_START_SUSPEND,
IDE_PM_FLUSH_CACHE = IDE_PM_START_SUSPEND,
IDE_PM_STANDBY,
IDE_PM_START_RESUME,
IDE_PM_RESTORE_PIO = IDE_PM_START_RESUME,
IDE_PM_IDLE,
IDE_PM_RESTORE_DMA,
IDE_PM_COMPLETED,
};
/*
......
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