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 --- drivers/gpu/drm/ttm/ttm_resource.c | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'drivers/gpu/drm/ttm/ttm_resource.c') 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 * -- cgit v1.2.3-70-g09d2