2012-05-15 13:23:44 +00:00
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/*-
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* Copyright (c) 2006, Myricom Inc.
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* Copyright (c) 2008, Intel Corporation.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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2008-06-11 22:12:50 +00:00
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#ifndef _TCP_LRO_H_
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#define _TCP_LRO_H_
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struct lro_entry;
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struct lro_entry
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{
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SLIST_ENTRY(lro_entry) next;
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2011-01-07 21:40:34 +00:00
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struct mbuf *m_head;
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2008-06-11 22:12:50 +00:00
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struct mbuf *m_tail;
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int timestamp;
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struct ip *ip;
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uint32_t tsval;
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uint32_t tsecr;
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uint32_t source_ip;
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uint32_t dest_ip;
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uint32_t next_seq;
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uint32_t ack_seq;
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uint32_t len;
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uint32_t data_csum;
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uint16_t window;
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uint16_t source_port;
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uint16_t dest_port;
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uint16_t append_cnt;
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uint16_t mss;
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};
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SLIST_HEAD(lro_head, lro_entry);
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struct lro_ctrl {
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struct ifnet *ifp;
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int lro_queued;
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int lro_flushed;
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int lro_bad_csum;
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int lro_cnt;
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struct lro_head lro_active;
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struct lro_head lro_free;
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};
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int tcp_lro_init(struct lro_ctrl *);
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void tcp_lro_free(struct lro_ctrl *);
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void tcp_lro_flush(struct lro_ctrl *, struct lro_entry *);
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int tcp_lro_rx(struct lro_ctrl *, struct mbuf *, uint32_t);
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/* Number of LRO entries - these are per rx queue */
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#define LRO_ENTRIES 8
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#endif /* _TCP_LRO_H_ */
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