amdgpu_copy_buffer
r = amdgpu_copy_buffer(ring, saddr, daddr, size, NULL, &fence,
r = amdgpu_copy_buffer(ring, bo_addr, shadow_addr,
return amdgpu_copy_buffer(ring, shadow_addr, parent_addr,
r = amdgpu_copy_buffer(ring, gart_addr, vram_addr,
r = amdgpu_copy_buffer(ring, vram_addr, gart_addr,
r = amdgpu_copy_buffer(ring, from, to, cur_size,
int amdgpu_copy_buffer(struct amdgpu_ring *ring, uint64_t src_offset,