drm/amdgpu: PRT support for gfx9 (v3)

Fix PRT handling on gfx9

v2: unify PRT bit for all ASICs
v3: move PRT flag checking in amdgpu_vm_bo_split_mapping()
Signed-off-by: NJunwei Zhang <Jerry.Zhang@amd.com>
Acked-by: NDavid Zhou <david1.zhou@amd.com>
Reviewed-by: NChristian König <christian.koenig@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

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

@@ -1338,6 +1338,12 @@ static int amdgpu_vm_bo_split_mapping(struct amdgpu_device *adev,
 	flags &= ~AMDGPU_PTE_MTYPE_MASK;
 	flags |= (mapping->flags & AMDGPU_PTE_MTYPE_MASK);
 
+	if ((mapping->flags & AMDGPU_PTE_PRT) &&
+	    (adev->asic_type >= CHIP_VEGA10)) {
+		flags |= AMDGPU_PTE_PRT;
+		flags &= ~AMDGPU_PTE_VALID;
+	}
+
 	trace_amdgpu_vm_bo_update(mapping);
 
 	pfn = mapping->offset >> PAGE_SHIFT;

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

@@ -65,7 +65,8 @@ struct amdgpu_bo_list_entry;
 
 #define AMDGPU_PTE_FRAG(x)	((x & 0x1fULL) << 7)
 
-#define AMDGPU_PTE_PRT		(1ULL << 63)
+/* TILED for VEGA10, reserved for older ASICs  */
+#define AMDGPU_PTE_PRT		(1ULL << 51)
 
 /* VEGA10 only */
 #define AMDGPU_PTE_MTYPE(a)    ((uint64_t)a << 57)