diff options
| -rw-r--r-- | drivers/ide/ide-io.c | 62 | ||||
| -rw-r--r-- | drivers/ide/ide.c | 4 | ||||
| -rw-r--r-- | include/linux/ide.h | 34 |
3 files changed, 40 insertions, 60 deletions
diff --git a/drivers/ide/ide-io.c b/drivers/ide/ide-io.c index 623f6c246cf5..f8d8642903da 100644 --- a/drivers/ide/ide-io.c +++ b/drivers/ide/ide-io.c @@ -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)) diff --git a/drivers/ide/ide.c b/drivers/ide/ide.c index 78776bbb537e..40b5a4614340 100644 --- a/drivers/ide/ide.c +++ b/drivers/ide/ide.c @@ -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); diff --git a/include/linux/ide.h b/include/linux/ide.h index cf7ec3a9d173..02984f1f041a 100644 --- a/include/linux/ide.h +++ b/include/linux/ide.h @@ -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, }; /* |