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authorChristian König <christian.koenig@amd.com>2021-07-15 14:17:19 +0200
committerChristian König <christian.koenig@amd.com>2022-01-26 15:30:19 +0100
commitfda8d552c9c7783d4b29aeb6350d7404b31cdbff (patch)
tree5522b74728e5ef71e87ba35c6c4de3e0008b8e33 /include/drm/ttm/ttm_resource.h
parent3f268ef06f8cf3c481dbd5843d564f5170c6df54 (diff)
drm/ttm: add a weak BO reference to the resource v3
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 <christian.koenig@amd.com> Acked-by: Huang Rui <ray.huang@amd.com> Link: https://patchwork.freedesktop.org/patch/msgid/20220124122514.1832-4-christian.koenig@amd.com
Diffstat (limited to 'include/drm/ttm/ttm_resource.h')
-rw-r--r--include/drm/ttm/ttm_resource.h4
1 files changed, 4 insertions, 0 deletions
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,