2 * Copyright (c) 2006, Myricom Inc.
3 * Copyright (c) 2008, Intel Corporation.
4 * Copyright (c) 2016 Mellanox Technologies.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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.
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
36 #ifndef TCP_LRO_ENTRIES
37 /* Define default number of LRO entries per RX queue */
38 #define TCP_LRO_ENTRIES 8
41 #define TCP_LRO_SEQUENCE(mb) \
42 (mb)->m_pkthdr.PH_loc.thirtytwo[0]
46 SLIST_ENTRY(lro_entry) next;
55 struct in6_addr s_ip6;
59 struct in6_addr d_ip6;
63 uint16_t eh_type; /* EthernetHeader type. */
65 uint32_t p_len; /* IP header payload length. */
66 uint32_t ulp_csum; /* TCP, etc. checksum. */
67 uint32_t next_seq; /* tcp_seq */
68 uint32_t ack_seq; /* tcp_seq */
72 uint16_t timestamp; /* flag, not a TCP hdr field. */
75 SLIST_HEAD(lro_head, lro_entry);
77 #define le_ip4 leip.ip4
78 #define le_ip6 leip.ip6
79 #define source_ip4 lesource.s_ip4
80 #define dest_ip4 ledest.d_ip4
81 #define source_ip6 lesource.s_ip6
82 #define dest_ip6 ledest.d_ip6
84 /* NB: This is part of driver structs. */
87 struct mbuf **lro_mbuf_data;
90 uint64_t lro_bad_csum;
92 unsigned lro_mbuf_count;
93 unsigned lro_mbuf_max;
94 unsigned short lro_ackcnt_lim; /* max # of aggregated ACKs */
95 unsigned lro_length_lim; /* max len of aggregated data */
97 struct lro_head lro_active;
98 struct lro_head lro_free;
101 #define TCP_LRO_LENGTH_MAX 65535
102 #define TCP_LRO_ACKCNT_MAX 65535 /* unlimited */
104 int tcp_lro_init(struct lro_ctrl *);
105 int tcp_lro_init_args(struct lro_ctrl *, struct ifnet *, unsigned, unsigned);
106 void tcp_lro_free(struct lro_ctrl *);
107 void tcp_lro_flush_inactive(struct lro_ctrl *, const struct timeval *);
108 void tcp_lro_flush(struct lro_ctrl *, struct lro_entry *);
109 void tcp_lro_flush_all(struct lro_ctrl *);
110 int tcp_lro_rx(struct lro_ctrl *, struct mbuf *, uint32_t);
111 void tcp_lro_queue_mbuf(struct lro_ctrl *, struct mbuf *);
113 #define TCP_LRO_CANNOT -1
114 #define TCP_LRO_NOT_SUPPORTED 1
116 #endif /* _TCP_LRO_H_ */