1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2006, Myricom Inc. 5 * Copyright (c) 2008, Intel Corporation. 6 * Copyright (c) 2016 Mellanox Technologies. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 * 30 * $FreeBSD$ 31 */ 32 33 #ifndef _TCP_LRO_H_ 34 #define _TCP_LRO_H_ 35 36 #include <sys/time.h> 37 38 #ifndef TCP_LRO_ENTRIES 39 /* Define default number of LRO entries per RX queue */ 40 #define TCP_LRO_ENTRIES 8 41 #endif 42 43 struct lro_entry { 44 LIST_ENTRY(lro_entry) next; 45 LIST_ENTRY(lro_entry) hash_next; 46 struct mbuf *m_head; 47 struct mbuf *m_tail; 48 union { 49 struct ip *ip4; 50 struct ip6_hdr *ip6; 51 } leip; 52 union { 53 in_addr_t s_ip4; 54 struct in6_addr s_ip6; 55 } lesource; 56 union { 57 in_addr_t d_ip4; 58 struct in6_addr d_ip6; 59 } ledest; 60 uint16_t source_port; 61 uint16_t dest_port; 62 uint16_t eh_type; /* EthernetHeader type. */ 63 uint16_t append_cnt; 64 uint32_t p_len; /* IP header payload length. */ 65 uint32_t ulp_csum; /* TCP, etc. checksum. */ 66 uint32_t next_seq; /* tcp_seq */ 67 uint32_t ack_seq; /* tcp_seq */ 68 uint32_t tsval; 69 uint32_t tsecr; 70 uint16_t window; 71 uint16_t timestamp; /* flag, not a TCP hdr field. */ 72 struct timeval mtime; 73 }; 74 LIST_HEAD(lro_head, lro_entry); 75 76 #define le_ip4 leip.ip4 77 #define le_ip6 leip.ip6 78 #define source_ip4 lesource.s_ip4 79 #define dest_ip4 ledest.d_ip4 80 #define source_ip6 lesource.s_ip6 81 #define dest_ip6 ledest.d_ip6 82 83 struct lro_mbuf_sort { 84 uint64_t seq; 85 struct mbuf *mb; 86 }; 87 88 /* NB: This is part of driver structs. */ 89 struct lro_ctrl { 90 struct ifnet *ifp; 91 struct lro_mbuf_sort *lro_mbuf_data; 92 uint64_t lro_queued; 93 uint64_t lro_flushed; 94 uint64_t lro_bad_csum; 95 unsigned lro_cnt; 96 unsigned lro_mbuf_count; 97 unsigned lro_mbuf_max; 98 unsigned short lro_ackcnt_lim; /* max # of aggregated ACKs */ 99 unsigned lro_length_lim; /* max len of aggregated data */ 100 101 u_long lro_hashsz; 102 struct lro_head *lro_hash; 103 struct lro_head lro_active; 104 struct lro_head lro_free; 105 }; 106 107 #define TCP_LRO_LENGTH_MAX 65535 108 #define TCP_LRO_ACKCNT_MAX 65535 /* unlimited */ 109 110 int tcp_lro_init(struct lro_ctrl *); 111 int tcp_lro_init_args(struct lro_ctrl *, struct ifnet *, unsigned, unsigned); 112 void tcp_lro_free(struct lro_ctrl *); 113 void tcp_lro_flush_inactive(struct lro_ctrl *, const struct timeval *); 114 void tcp_lro_flush(struct lro_ctrl *, struct lro_entry *); 115 void tcp_lro_flush_all(struct lro_ctrl *); 116 int tcp_lro_rx(struct lro_ctrl *, struct mbuf *, uint32_t); 117 void tcp_lro_queue_mbuf(struct lro_ctrl *, struct mbuf *); 118 119 #define TCP_LRO_NO_ENTRIES -2 120 #define TCP_LRO_CANNOT -1 121 #define TCP_LRO_NOT_SUPPORTED 1 122 123 #endif /* _TCP_LRO_H_ */ 124