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ttm: Provide an API for starting and stopping the delayed workqueue

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We want to be able to prevent the delayed workqueue from changing state
while we're reclocking, so add an API to block and unblock it.

Signed-off-by: Matthew Garrett <mjg@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Matthew Garrett 2010-04-26 16:00:09 -04:00 committed by Dave Airlie
parent 8f5b5e632c
commit 7c5ee5366f
2 changed files with 31 additions and 0 deletions
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14
drivers/gpu/drm/ttm/ttm_bo.c
View file

@ -604,6 +604,20 @@ void ttm_bo_unref(struct ttm_buffer_object **p_bo)
}
EXPORT_SYMBOL(ttm_bo_unref);
int ttm_bo_lock_delayed_workqueue(struct ttm_bo_device *bdev)
{
return cancel_delayed_work_sync(&bdev->wq);
}
EXPORT_SYMBOL(ttm_bo_lock_delayed_workqueue);
void ttm_bo_unlock_delayed_workqueue(struct ttm_bo_device *bdev, int resched)
{
if (resched)
schedule_delayed_work(&bdev->wq,
((HZ / 100) < 1) ? 1 : HZ / 100);
}
EXPORT_SYMBOL(ttm_bo_unlock_delayed_workqueue);
static int ttm_bo_evict(struct ttm_buffer_object *bo, bool interruptible,
bool no_wait_reserve, bool no_wait_gpu)
{

17
include/drm/ttm/ttm_bo_api.h
View file

@ -361,6 +361,23 @@ extern int ttm_bo_validate(struct ttm_buffer_object *bo,
*/
extern void ttm_bo_unref(struct ttm_buffer_object **bo);
/**
* ttm_bo_lock_delayed_workqueue
*
* Prevent the delayed workqueue from running.
* Returns
* True if the workqueue was queued at the time
*/
extern int ttm_bo_lock_delayed_workqueue(struct ttm_bo_device *bdev);
/**
* ttm_bo_unlock_delayed_workqueue
*
* Allows the delayed workqueue to run.
*/
extern void ttm_bo_unlock_delayed_workqueue(struct ttm_bo_device *bdev,
int resched);
/**
* ttm_bo_synccpu_write_grab
*