ttm: Provide an API for starting and stopping the delayed workqueue
authorMatthew Garrett <mjg@redhat.com>
Mon, 26 Apr 2010 20:00:09 +0000 (16:00 -0400)
committerDave Airlie <airlied@redhat.com>
Tue, 18 May 2010 08:21:20 +0000 (18:21 +1000)
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>
drivers/gpu/drm/ttm/ttm_bo.c
include/drm/ttm/ttm_bo_api.h

index 3b5b094b1397ab75e01ee97ca538ff47076beed3..4c2299299ab2c2499f61b04df252615639f158fd 100644 (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)
 {
index 3e273e0b9417eed6f430963cfd679669a4f6daf1..267a86c74e2e5cc089dfb5c72a1f1da3dbdae721 100644 (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
  *