drm/amdgpu: Correct dGPU MTYPE settings for gfx943

Revert temporary dGPU VRAM MTYPE setting and align with expected
coherency protocol.
Signed-off-by: Graham Sider <Graham.Sider@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c

@@ -1238,17 +1238,12 @@ static void gmc_v9_0_get_coherence_flags(struct amdgpu_device *adev,
 			mtype = MTYPE_RW;
 		} else {
 			/* dGPU */
-			/*
-			if ((mem->alloc_flags & KFD_IOC_ALLOC_MEM_FLAGS_VRAM) &&
-			    bo_adev == adev)
-				mapping_flags |= AMDGPU_VM_MTYPE_RW;
+			if (is_vram && bo_adev == adev)
+				mtype = MTYPE_RW;
+			else if (is_vram)
+				mtype = MTYPE_NC;
 			else
-			*/
-			/* Temporarily comment out above lines and use MTYPE_NC
-			 * on both VRAM and system memory access until
-			 * MTYPE_RW can properly work on VRAM access
-			 */
-			mtype = MTYPE_NC;
+				mtype = MTYPE_UC;
 		}
 
 		break;

drivers/gpu/drm/amd/amdkfd/kfd_svm.c

@@ -1198,13 +1198,9 @@ svm_range_get_pte_flags(struct kfd_node *node,
 		if (uncached) {
 			mapping_flags |= AMDGPU_VM_MTYPE_UC;
 		} else if (domain == SVM_RANGE_VRAM_DOMAIN) {
-			/* local HBM region close to partition with a workaround
-			 * for Endpoint systems.
-			 */
+			/* local HBM region close to partition */
 			if (bo_node == node)
-				mapping_flags |=
-					(node->adev->flags & AMD_IS_APU) ?
-					AMDGPU_VM_MTYPE_RW : AMDGPU_VM_MTYPE_NC;
+				mapping_flags |= AMDGPU_VM_MTYPE_RW;
 			/* local HBM region far from partition or remote XGMI GPU */
 			else if (svm_nodes_in_same_hive(bo_node, node))
 				mapping_flags |= AMDGPU_VM_MTYPE_NC;