tcp_tlro.h revision 291184 
1/*-
2 * Copyright (c) 2015 Mellanox Technologies. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS `AS IS' AND
14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 * ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
23 * SUCH DAMAGE.
24 *
25 * $FreeBSD: stable/10/sys/dev/mlx5/mlx5_en/tcp_tlro.h 291184 2015-11-23 09:32:32Z hselasky $
26 */
27
28#ifndef _TCP_TLRO_H_
29#define	_TCP_TLRO_H_
30
31#define	TLRO_MAX_HEADER	64		/* bytes */
32
33struct ip;
34struct ip6_hdr;
35struct tcphdr;
36
37struct tlro_mbuf_data {
38	union {
39#ifdef INET
40		struct ip *v4;
41#endif
42#ifdef INET6
43		struct ip6_hdr *v6;
44#endif
45	} ip;
46	struct tcphdr *tcp;
47	struct mbuf *head;
48	struct mbuf **pprev;
49	int	last_tick;
50	int	sequence;
51	int	data_len;
52	int	data_off;
53	int	ip_hdrlen;
54	int	ip_len;
55	uint32_t tcp_ts;
56	uint32_t tcp_ts_reply;
57	uint16_t tcp_len;
58	uint8_t	ip_version;
59	uint8_t	buf_length;		/* in 32-bit words */
60	uint64_t buf[TLRO_MAX_HEADER / 8];
61} __aligned(256);
62
63struct tlro_mbuf_ptr {
64	struct tlro_mbuf_data *data;
65};
66
67/* NB: This is part of driver structs */
68struct tlro_ctrl {
69	struct ifnet *ifp;
70	struct tlro_mbuf_ptr *mbuf;
71	uint64_t lro_queued;
72	uint64_t lro_flushed;
73	uint32_t max;
74	uint32_t curr;
75	int	sequence;
76};
77
78int	tcp_tlro_init(struct tlro_ctrl *, struct ifnet *, int);
79void	tcp_tlro_free(struct tlro_ctrl *);
80void	tcp_tlro_flush(struct tlro_ctrl *, int);
81void	tcp_tlro_rx(struct tlro_ctrl *, struct mbuf *);
82
83#endif					/* _TCP_TLRO_H_ */
84