drm/amdgpu: revert "add new bo flag that indicates BOs don't need fallback (v2)"

This reverts commit 6f51d28bfe8e1a676de5cd877639245bed3cc818.

Makes fallback handling to complicated. This is just a feature for the
GEM interface and shouldn't leak into the core BO create function.

Signed-off-by: Christian König <christian.koenig@amd.com>
Acked-by: Chunming Zhou <david1.zhou@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c

@@ -385,8 +385,7 @@ retry:
 	    amdgpu_bo_in_cpu_visible_vram(bo))
 		p->bytes_moved_vis += ctx.bytes_moved;
 
-	if (unlikely(r == -ENOMEM) && domain != bo->allowed_domains &&
-	    !(bo->flags & AMDGPU_GEM_CREATE_NO_FALLBACK)) {
+	if (unlikely(r == -ENOMEM) && domain != bo->allowed_domains) {
 		domain = bo->allowed_domains;
 		goto retry;
 	}

drivers/gpu/drm/amd/amdgpu/amdgpu_object.c

@@ -388,8 +388,6 @@ retry:
 	drm_gem_private_object_init(adev->ddev, &bo->gem_base, size);
 	INIT_LIST_HEAD(&bo->shadow_list);
 	INIT_LIST_HEAD(&bo->va);
-	bo->preferred_domains = preferred_domains;
-	bo->allowed_domains = allowed_domains;
 
 	bo->flags = flags;
 
@@ -426,8 +424,7 @@ retry:
 	r = ttm_bo_init_reserved(&adev->mman.bdev, &bo->tbo, size, type,
 				 &bo->placement, page_align, &ctx, acc_size,
 				 NULL, resv, &amdgpu_ttm_bo_destroy);
-	if (unlikely(r && r != -ERESTARTSYS) && type == ttm_bo_type_device &&
-	    !(flags & AMDGPU_GEM_CREATE_NO_FALLBACK)) {
+	if (unlikely(r && r != -ERESTARTSYS) && type == ttm_bo_type_device) {
 		if (flags & AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED) {
 			flags &= ~AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED;
 			goto retry;

include/uapi/drm/amdgpu_drm.h

@@ -95,8 +95,6 @@ extern "C" {
 #define AMDGPU_GEM_CREATE_VM_ALWAYS_VALID	(1 << 6)
 /* Flag that BO sharing will be explicitly synchronized */
 #define AMDGPU_GEM_CREATE_EXPLICIT_SYNC		(1 << 7)
-/* Flag that BO doesn't need fallback */
-#define AMDGPU_GEM_CREATE_NO_FALLBACK		(1 << 8)
 
 struct drm_amdgpu_gem_create_in  {
 	/** the requested memory size */