drm/amdgpu: always set and check dma addresses in the VM code

Clean that up a bit and allow to always have the DMA addresses around.
Signed-off-by: Christian König <christian.koenig@amd.com>
Acked-by: Chunming Zhou <david1.zhou@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -85,6 +85,13 @@ struct amdgpu_pte_update_params {
 	 */
 	struct amdgpu_vm *vm;
 
+	/**
+	 * @pages_addr:
+	 *
+	 * DMA addresses to use for mapping
+	 */
+	dma_addr_t *pages_addr;
+
 	/**
 	 * @src: address where to copy page table entries from
 	 */
@@ -102,12 +109,6 @@ struct amdgpu_pte_update_params {
 		     struct amdgpu_bo *bo, uint64_t pe,
 		     uint64_t addr, unsigned count, uint32_t incr,
 		     uint64_t flags);
-	/**
-	 * @pages_addr:
-	 *
-	 * DMA addresses to use for mapping, used during VM update by CPU
-	 */
-	dma_addr_t *pages_addr;
 };
 
 /**
@@ -1572,7 +1573,7 @@ static void amdgpu_vm_fragment(struct amdgpu_pte_update_params *params,
 		max_frag = 31;
 
 	/* system pages are non continuously */
-	if (params->src) {
+	if (params->pages_addr) {
 		*frag = 0;
 		*frag_end = end;
 		return;
@@ -1752,16 +1753,13 @@ static int amdgpu_vm_bo_update_mapping(struct amdgpu_device *adev,
 	memset(&params, 0, sizeof(params));
 	params.adev = adev;
 	params.vm = vm;
+	params.pages_addr = pages_addr;
 
 	/* sync to everything except eviction fences on unmapping */
 	if (!(flags & AMDGPU_PTE_VALID))
 		owner = AMDGPU_FENCE_OWNER_KFD;
 
 	if (vm->use_cpu_for_update) {
-		/* params.src is used as flag to indicate system Memory */
-		if (pages_addr)
-			params.src = ~0;
-
 		/* Wait for PT BOs to be idle. PTs share the same resv. object
 		 * as the root PD BO
 		 */
@@ -1777,7 +1775,6 @@ static int amdgpu_vm_bo_update_mapping(struct amdgpu_device *adev,
 		}
 
 		params.func = amdgpu_vm_cpu_set_ptes;
-		params.pages_addr = pages_addr;
 		return amdgpu_vm_update_ptes(&params, start, last + 1,
 					     addr, flags);
 	}