From 803d89ade4ede131405c57ec1a1db32673995b2e Mon Sep 17 00:00:00 2001 From: Christopher James Halse Rogers Date: Mon, 3 Apr 2017 13:31:22 +1000 Subject: [PATCH] drm/amdgpu: Refuse to pin or change acceptable domains of prime BOs to VRAM. (v2) MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Migration to VRAM will break the sharing, resulting in rendering on the exporting GPU never becoming visible on the importing GPU. v2: Don't pin BOs to GTT. Instead, refuse to migrate them out of GTT. Reviewed-by: Christian König Signed-off-by: Christopher James Halse Rogers Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c | 5 +++++ drivers/gpu/drm/amd/amdgpu/amdgpu_object.c | 4 ++++ 2 files changed, 9 insertions(+) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c index bb710e0..03a9c5c 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c @@ -729,6 +729,11 @@ int amdgpu_gem_op_ioctl(struct drm_device *dev, void *data, break; } case AMDGPU_GEM_OP_SET_PLACEMENT: + if (robj->prime_shared_count && (args->value & AMDGPU_GEM_DOMAIN_VRAM)) { + r = -EINVAL; + amdgpu_bo_unreserve(robj); + break; + } if (amdgpu_ttm_tt_get_usermm(robj->tbo.ttm)) { r = -EPERM; amdgpu_bo_unreserve(robj); diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c index 758d8cf..cb89fff 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c @@ -650,6 +650,10 @@ int amdgpu_bo_pin_restricted(struct amdgpu_bo *bo, u32 domain, if (WARN_ON_ONCE(min_offset > max_offset)) return -EINVAL; + /* A shared bo cannot be migrated to VRAM */ + if (bo->prime_shared_count && (domain == AMDGPU_GEM_DOMAIN_VRAM)) + return -EINVAL; + if (bo->pin_count) { uint32_t mem_type = bo->tbo.mem.mem_type; -- 2.7.4