drm/amdgpu: cleanup VM fragment defines

We can actually do way more than just the 64KB we currently used as default.
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu.h

@@ -830,6 +830,9 @@ struct amdgpu_ring {
 /* PTBs (Page Table Blocks) need to be aligned to 32K */
 #define AMDGPU_VM_PTB_ALIGN_SIZE   32768
 
+/* LOG2 number of continuous pages for the fragment field */
+#define AMDGPU_LOG2_PAGES_PER_FRAG 4
+
 #define AMDGPU_PTE_VALID	(1 << 0)
 #define AMDGPU_PTE_SYSTEM	(1 << 1)
 #define AMDGPU_PTE_SNOOPED	(1 << 2)
@@ -840,10 +843,7 @@ struct amdgpu_ring {
 #define AMDGPU_PTE_READABLE	(1 << 5)
 #define AMDGPU_PTE_WRITEABLE	(1 << 6)
 
-/* PTE (Page Table Entry) fragment field for different page sizes */
-#define AMDGPU_PTE_FRAG_4KB	(0 << 7)
-#define AMDGPU_PTE_FRAG_64KB	(4 << 7)
-#define AMDGPU_LOG2_PAGES_PER_FRAG 4
+#define AMDGPU_PTE_FRAG(x)	((x & 0x1f) << 7)
 
 /* How to programm VM fault handling */
 #define AMDGPU_VM_FAULT_STOP_NEVER	0

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

@@ -739,7 +739,7 @@ static void amdgpu_vm_frag_ptes(struct amdgpu_device *adev,
 	 */
 
 	/* SI and newer are optimized for 64KB */
-	uint64_t frag_flags = AMDGPU_PTE_FRAG_64KB;
+	uint64_t frag_flags = AMDGPU_PTE_FRAG(AMDGPU_LOG2_PAGES_PER_FRAG);
 	uint64_t frag_align = 0x80;
 
 	uint64_t frag_start = ALIGN(pe_start, frag_align);