From fda8d552c9c7783d4b29aeb6350d7404b31cdbff Mon Sep 17 00:00:00 2001 From: Christian König Date: Thu, 15 Jul 2021 14:17:19 +0200 Subject: drm/ttm: add a weak BO reference to the resource v3 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Keep track for which BO a resource was allocated. This is necessary to move the LRU handling into the resources. A bit problematic is i915 since it tries to use the resource interface without a BO which is illegal from the conceptional point of view. v2: Document that this is a weak reference and add a workaround for i915 v3: further document that this is protected by ttm_device::lru_lock and clarify the i915 workaround Signed-off-by: Christian König Acked-by: Huang Rui Link: https://patchwork.freedesktop.org/patch/msgid/20220124122514.1832-4-christian.koenig@amd.com --- include/drm/ttm/ttm_resource.h | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'include/drm') diff --git a/include/drm/ttm/ttm_resource.h b/include/drm/ttm/ttm_resource.h index 6bf37383002b..69eea9d6399b 100644 --- a/include/drm/ttm/ttm_resource.h +++ b/include/drm/ttm/ttm_resource.h @@ -161,6 +161,7 @@ struct ttm_bus_placement { * @mem_type: Resource type of the allocation. * @placement: Placement flags. * @bus: Placement on io bus accessible to the CPU + * @bo: weak reference to the BO, protected by ttm_device::lru_lock * * Structure indicating the placement and space resources used by a * buffer object. @@ -171,6 +172,7 @@ struct ttm_resource { uint32_t mem_type; uint32_t placement; struct ttm_bus_placement bus; + struct ttm_buffer_object *bo; }; /** @@ -271,6 +273,8 @@ int ttm_resource_alloc(struct ttm_buffer_object *bo, void ttm_resource_free(struct ttm_buffer_object *bo, struct ttm_resource **res); bool ttm_resource_compat(struct ttm_resource *res, struct ttm_placement *placement); +void ttm_resource_set_bo(struct ttm_resource *res, + struct ttm_buffer_object *bo); void ttm_resource_manager_init(struct ttm_resource_manager *man, struct ttm_device *bdev, -- cgit v1.2.3