fill_mem
ret = adev->lsdma.funcs->fill_mem(adev, dst_addr, data, current_fill_size);
int (*fill_mem)(struct amdgpu_device *adev, uint64_t dst_addr,
.fill_mem = lsdma_v6_0_fill_mem,
.fill_mem = lsdma_v7_0_fill_mem,
fill_mem(bc, 0, card->send.size, 0xff);
fill_mem(bc, bc->idx, bc->free, 0xff);