From 95762c2b34069bf4adb7929969f1f5f5fc8a38df Mon Sep 17 00:00:00 2001 From: Thomas Hellstrom Date: Wed, 17 Nov 2010 12:28:30 +0000 Subject: drm/ttm: Improved fencing of buffer object lists Drastically reduce the number of spin lock / unlock operations by performing unreserving and fencing under global locks. Signed-off-by: Thomas Hellstrom Reviewed-by: Jerome Glisse Signed-off-by: Dave Airlie --- include/drm/ttm/ttm_bo_driver.h | 10 ++++++++++ include/drm/ttm/ttm_execbuf_util.h | 2 ++ 2 files changed, 12 insertions(+) (limited to 'include/drm') diff --git a/include/drm/ttm/ttm_bo_driver.h b/include/drm/ttm/ttm_bo_driver.h index ca8131e98300..cfb9ca4ec1c4 100644 --- a/include/drm/ttm/ttm_bo_driver.h +++ b/include/drm/ttm/ttm_bo_driver.h @@ -909,6 +909,16 @@ extern int ttm_bo_reserve_locked(struct ttm_buffer_object *bo, */ extern void ttm_bo_unreserve(struct ttm_buffer_object *bo); +/** + * ttm_bo_unreserve_locked + * + * @bo: A pointer to a struct ttm_buffer_object. + * + * Unreserve a previous reservation of @bo. + * Needs to be called with struct ttm_bo_global::lru_lock held. + */ +extern void ttm_bo_unreserve_locked(struct ttm_buffer_object *bo); + /** * ttm_bo_wait_unreserved * diff --git a/include/drm/ttm/ttm_execbuf_util.h b/include/drm/ttm/ttm_execbuf_util.h index fd09b8438977..535ab00407e0 100644 --- a/include/drm/ttm/ttm_execbuf_util.h +++ b/include/drm/ttm/ttm_execbuf_util.h @@ -44,6 +44,7 @@ * @reserved: Indicates whether @bo has been reserved for validation. * @removed: Indicates whether @bo has been removed from lru lists. * @put_count: Number of outstanding references on bo::list_kref. + * @old_sync_obj: Pointer to a sync object about to be unreferenced */ struct ttm_validate_buffer { @@ -53,6 +54,7 @@ struct ttm_validate_buffer { bool reserved; bool removed; int put_count; + void *old_sync_obj; }; /** -- cgit v1.2.3