1*99a2dd95SBruce Richardson /* SPDX-License-Identifier: BSD-3-Clause 2*99a2dd95SBruce Richardson * Copyright(c) 2017 Intel Corporation 3*99a2dd95SBruce Richardson */ 4*99a2dd95SBruce Richardson 5*99a2dd95SBruce Richardson #ifndef _GSO_TCP4_H_ 6*99a2dd95SBruce Richardson #define _GSO_TCP4_H_ 7*99a2dd95SBruce Richardson 8*99a2dd95SBruce Richardson #include <stdint.h> 9*99a2dd95SBruce Richardson 10*99a2dd95SBruce Richardson /** 11*99a2dd95SBruce Richardson * Segment an IPv4/TCP packet. This function doesn't check if the input 12*99a2dd95SBruce Richardson * packet has correct checksums, and doesn't update checksums for output 13*99a2dd95SBruce Richardson * GSO segments. Furthermore, it doesn't process IP fragment packets. 14*99a2dd95SBruce Richardson * 15*99a2dd95SBruce Richardson * @param pkt 16*99a2dd95SBruce Richardson * The packet mbuf to segment. 17*99a2dd95SBruce Richardson * @param gso_size 18*99a2dd95SBruce Richardson * The max length of a GSO segment, measured in bytes. 19*99a2dd95SBruce Richardson * @param ipid_delta 20*99a2dd95SBruce Richardson * The increasing unit of IP ids. 21*99a2dd95SBruce Richardson * @param direct_pool 22*99a2dd95SBruce Richardson * MBUF pool used for allocating direct buffers for output segments. 23*99a2dd95SBruce Richardson * @param indirect_pool 24*99a2dd95SBruce Richardson * MBUF pool used for allocating indirect buffers for output segments. 25*99a2dd95SBruce Richardson * @param pkts_out 26*99a2dd95SBruce Richardson * Pointer array used to store the MBUF addresses of output GSO 27*99a2dd95SBruce Richardson * segments, when the function succeeds. If the memory space in 28*99a2dd95SBruce Richardson * pkts_out is insufficient, it fails and returns -EINVAL. 29*99a2dd95SBruce Richardson * @param nb_pkts_out 30*99a2dd95SBruce Richardson * The max number of items that 'pkts_out' can keep. 31*99a2dd95SBruce Richardson * 32*99a2dd95SBruce Richardson * @return 33*99a2dd95SBruce Richardson * - The number of GSO segments filled in pkts_out on success. 34*99a2dd95SBruce Richardson * - Return -ENOMEM if run out of memory in MBUF pools. 35*99a2dd95SBruce Richardson * - Return -EINVAL for invalid parameters. 36*99a2dd95SBruce Richardson */ 37*99a2dd95SBruce Richardson int gso_tcp4_segment(struct rte_mbuf *pkt, 38*99a2dd95SBruce Richardson uint16_t gso_size, 39*99a2dd95SBruce Richardson uint8_t ip_delta, 40*99a2dd95SBruce Richardson struct rte_mempool *direct_pool, 41*99a2dd95SBruce Richardson struct rte_mempool *indirect_pool, 42*99a2dd95SBruce Richardson struct rte_mbuf **pkts_out, 43*99a2dd95SBruce Richardson uint16_t nb_pkts_out); 44*99a2dd95SBruce Richardson #endif 45