amdgpu_ttm_tt_pde_flags
*flags = amdgpu_ttm_tt_pde_flags(bo->tbo.ttm, &bo->tbo.mem);
uint64_t flags = amdgpu_ttm_tt_pde_flags(ttm, mem);
uint64_t amdgpu_ttm_tt_pde_flags(struct ttm_tt *ttm, struct ttm_mem_reg *mem);