diff options
| 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 /drivers | |
| parent | drm/ttm: add back a reference to the bdev to the res manager (diff) | |
| download | linux-dev-fda8d552c9c7783d4b29aeb6350d7404b31cdbff.tar.xz linux-dev-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 'drivers')
| -rw-r--r-- | drivers/gpu/drm/ttm/ttm_bo_util.c | 7 | ||||
| -rw-r--r-- | drivers/gpu/drm/ttm/ttm_resource.c | 9 |
2 files changed, 14 insertions, 2 deletions
diff --git a/drivers/gpu/drm/ttm/ttm_bo_util.c b/drivers/gpu/drm/ttm/ttm_bo_util.c index 72a94301bc95..544a84fa6589 100644 --- a/drivers/gpu/drm/ttm/ttm_bo_util.c +++ b/drivers/gpu/drm/ttm/ttm_bo_util.c @@ -241,6 +241,11 @@ static int ttm_buffer_object_transfer(struct ttm_buffer_object *bo, if (bo->type != ttm_bo_type_sg) fbo->base.base.resv = &fbo->base.base._resv; + if (fbo->base.resource) { + ttm_resource_set_bo(fbo->base.resource, &fbo->base); + bo->resource = NULL; + } + dma_resv_init(&fbo->base.base._resv); fbo->base.base.dev = NULL; ret = dma_resv_trylock(&fbo->base.base._resv); @@ -509,7 +514,6 @@ static int ttm_bo_move_to_ghost(struct ttm_buffer_object *bo, ghost_obj->ttm = NULL; else bo->ttm = NULL; - bo->resource = NULL; dma_resv_unlock(&ghost_obj->base._resv); ttm_bo_put(ghost_obj); @@ -637,7 +641,6 @@ int ttm_bo_pipeline_gutting(struct ttm_buffer_object *bo) dma_resv_unlock(&ghost->base._resv); ttm_bo_put(ghost); bo->ttm = ttm; - bo->resource = NULL; ttm_bo_assign_mem(bo, sys_res); return 0; diff --git a/drivers/gpu/drm/ttm/ttm_resource.c b/drivers/gpu/drm/ttm/ttm_resource.c index 4717128633e9..68344c90549b 100644 --- a/drivers/gpu/drm/ttm/ttm_resource.c +++ b/drivers/gpu/drm/ttm/ttm_resource.c @@ -49,6 +49,7 @@ void ttm_resource_init(struct ttm_buffer_object *bo, res->bus.offset = 0; res->bus.is_iomem = false; res->bus.caching = ttm_cached; + res->bo = bo; } EXPORT_SYMBOL(ttm_resource_init); @@ -139,6 +140,14 @@ bool ttm_resource_compat(struct ttm_resource *res, } EXPORT_SYMBOL(ttm_resource_compat); +void ttm_resource_set_bo(struct ttm_resource *res, + struct ttm_buffer_object *bo) +{ + spin_lock(&bo->bdev->lru_lock); + res->bo = bo; + spin_unlock(&bo->bdev->lru_lock); +} + /** * ttm_resource_manager_init * |