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