1 /*- 2 * Copyright (c) 2006, Myricom Inc. 3 * Copyright (c) 2008, Intel Corporation. 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 * 27 * $FreeBSD$ 28 */ 29 30 #ifndef _TCP_LRO_H_ 31 #define _TCP_LRO_H_ 32 33 struct lro_entry; 34 struct lro_entry 35 { 36 SLIST_ENTRY(lro_entry) next; 37 struct mbuf *m_head; 38 struct mbuf *m_tail; 39 int timestamp; 40 struct ip *ip; 41 uint32_t tsval; 42 uint32_t tsecr; 43 uint32_t source_ip; 44 uint32_t dest_ip; 45 uint32_t next_seq; 46 uint32_t ack_seq; 47 uint32_t len; 48 uint32_t data_csum; 49 uint16_t window; 50 uint16_t source_port; 51 uint16_t dest_port; 52 uint16_t append_cnt; 53 uint16_t mss; 54 55 }; 56 SLIST_HEAD(lro_head, lro_entry); 57 58 struct lro_ctrl { 59 struct ifnet *ifp; 60 int lro_queued; 61 int lro_flushed; 62 int lro_bad_csum; 63 int lro_cnt; 64 65 struct lro_head lro_active; 66 struct lro_head lro_free; 67 }; 68 69 70 int tcp_lro_init(struct lro_ctrl *); 71 void tcp_lro_free(struct lro_ctrl *); 72 void tcp_lro_flush(struct lro_ctrl *, struct lro_entry *); 73 int tcp_lro_rx(struct lro_ctrl *, struct mbuf *, uint32_t); 74 75 /* Number of LRO entries - these are per rx queue */ 76 #define LRO_ENTRIES 8 77 78 #endif /* _TCP_LRO_H_ */ 79