1/* SPDX-License-Identifier: BSD-3-Clause 2 * Copyright(c) 2010-2014 Intel Corporation 3 */ 4 5#ifndef __INCLUDE_RTE_PORT_IP_FRAG_H__ 6#define __INCLUDE_RTE_PORT_IP_FRAG_H__ 7 8#ifdef __cplusplus 9extern "C" { 10#endif 11 12/** 13 * @file 14 * RTE Port for IPv4 Fragmentation 15 * 16 * This port is built on top of pre-initialized single consumer rte_ring. In 17 * order to minimize the amount of packets stored in the ring at any given 18 * time, the IP fragmentation functionality is executed on ring read operation, 19 * hence this port is implemented as an input port. A regular ring_writer port 20 * can be created to write to the same ring. 21 * 22 * The packets written to the ring are either complete IP datagrams or jumbo 23 * frames (i.e. IP packets with length bigger than provided MTU value). The 24 * packets read from the ring are all non-jumbo frames. The complete IP 25 * datagrams written to the ring are not changed. The jumbo frames are 26 * fragmented into several IP packets with length less or equal to MTU. 27 * 28 ***/ 29 30#include <stdint.h> 31 32#include <rte_ring.h> 33 34#include "rte_port.h" 35 36/** ring_reader_ipv4_frag port parameters */ 37struct rte_port_ring_reader_frag_params { 38 /** Underlying single consumer ring that has to be pre-initialized. */ 39 struct rte_ring *ring; 40 41 /** Maximum Transfer Unit (MTU). Maximum IP packet size (in bytes). */ 42 uint32_t mtu; 43 44 /** Size of application dependent meta-data stored per each input packet 45 that has to be copied to each of the fragments originating from the 46 same input IP datagram. */ 47 uint32_t metadata_size; 48 49 /** Pre-initialized buffer pool used for allocating direct buffers for 50 the output fragments. */ 51 struct rte_mempool *pool_direct; 52 53 /** Pre-initialized buffer pool used for allocating indirect buffers for 54 the output fragments. */ 55 struct rte_mempool *pool_indirect; 56}; 57 58#define rte_port_ring_reader_ipv4_frag_params rte_port_ring_reader_frag_params 59 60#define rte_port_ring_reader_ipv6_frag_params rte_port_ring_reader_frag_params 61 62/** ring_reader_ipv4_frag port operations */ 63extern struct rte_port_in_ops rte_port_ring_reader_ipv4_frag_ops; 64 65/** ring_reader_ipv6_frag port operations */ 66extern struct rte_port_in_ops rte_port_ring_reader_ipv6_frag_ops; 67 68#ifdef __cplusplus 69} 70#endif 71 72#endif 73