From: Leo Li sunpeng.li@amd.com
commit f5ba14043621f4afdf3ad5f92ee2d8dbebbe4340 upstream.
When pinning a buffer, we should check to see if there are any additional restrictions imposed by bo->preferred_domains. This will prevent the BO from being moved to an invalid domain when pinning.
For example, this can happen if the user requests to create a BO in GTT domain for display scanout. amdgpu_dm will allow pinning to either VRAM or GTT domains, since DCN can scanout from either or. However, in amdgpu_bo_pin_restricted(), pinning to VRAM is preferred if there is adequate carveout. This can lead to pinning to VRAM despite the user requesting GTT placement for the BO.
v2: Allow the kernel to override the domain, which can happen when exporting a BO to a V4L camera (for example).
Signed-off-by: Leo Li sunpeng.li@amd.com Reviewed-by: Alex Deucher alexander.deucher@amd.com Reviewed-by: Christian König christian.koenig@amd.com Signed-off-by: Alex Deucher alexander.deucher@amd.com Cc: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/gpu/drm/amd/amdgpu/amdgpu_object.c | 4 ++++ 1 file changed, 4 insertions(+)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c @@ -892,6 +892,10 @@ int amdgpu_bo_pin_restricted(struct amdg if (WARN_ON_ONCE(min_offset > max_offset)) return -EINVAL;
+ /* Check domain to be pinned to against preferred domains */ + if (bo->preferred_domains & domain) + domain = bo->preferred_domains & domain; + /* A shared bo cannot be migrated to VRAM */ if (bo->prime_shared_count) { if (domain & AMDGPU_GEM_DOMAIN_GTT)