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| author | Christian König <christian.koenig@amd.com> | 2021-07-15 14:17:19 +0200 |
|---|---|---|
| committer | Christian König <christian.koenig@amd.com> | 2022-01-26 15:30:19 +0100 |
| commit | fda8d552c9c7783d4b29aeb6350d7404b31cdbff (patch) | |
| tree | 5522b74728e5ef71e87ba35c6c4de3e0008b8e33 /include/drm | |
| parent | 3f268ef06f8cf3c481dbd5843d564f5170c6df54 (diff) | |
| download | linux-stable-fda8d552c9c7783d4b29aeb6350d7404b31cdbff.tar.gz linux-stable-fda8d552c9c7783d4b29aeb6350d7404b31cdbff.tar.bz2 linux-stable-fda8d552c9c7783d4b29aeb6350d7404b31cdbff.zip | |
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')
| -rw-r--r-- | include/drm/ttm/ttm_resource.h | 4 |
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, |