typedef int (rte_gpu_mem_free_t)(struct rte_gpu *dev, void *ptr);
typedef int (rte_gpu_mem_register_t)(struct rte_gpu *dev, size_t size, void *ptr);
typedef int (rte_gpu_mem_unregister_t)(struct rte_gpu *dev, void *ptr);
typedef int (rte_gpu_mem_free_t)(struct rte_gpu *dev, void *ptr);
typedef int (rte_gpu_mem_register_t)(struct rte_gpu *dev, size_t size, void *ptr);
typedef int (rte_gpu_mem_unregister_t)(struct rte_gpu *dev, void *ptr);