Add generic TCP LOR into netinet

1 files changed, 85 insertions, 0 deletions

diff --git a/sys/netinet/tcp_lro.h b/sys/netinet/tcp_lro.h
new file mode 100644
index 0000000..08aac69
--- /dev/null
+++ b/sys/netinet/tcp_lro.h
@@ -0,0 +1,85 @@
+/*******************************************************************************
+
+Copyright (c) 2006, Myricom Inc.
+Copyright (c) 2008, Intel Corporation.
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+ 1. Redistributions of source code must retain the above copyright notice,
+    this list of conditions and the following disclaimer.
+
+ 2. Neither the name of the Myricom Inc, nor the names of its
+    contributors may be used to endorse or promote products derived from
+    this software without specific prior written permission.
+
+ 2. Neither the name of the Intel Corporation, nor the names of its
+    contributors may be used to endorse or promote products derived from
+    this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGE.
+
+
+$FreeBSD$
+
+***************************************************************************/
+#ifndef _TCP_LRO_H_
+#define _TCP_LRO_H_
+
+struct lro_entry;
+struct lro_entry
+{
+	SLIST_ENTRY(lro_entry) next;
+	struct mbuf  	*m_head;
+	struct mbuf	*m_tail;
+	int		timestamp;
+	struct ip	*ip;
+	uint32_t	tsval;
+	uint32_t	tsecr;
+	uint32_t	source_ip;
+	uint32_t	dest_ip;
+	uint32_t	next_seq;
+	uint32_t	ack_seq;
+	uint32_t	len;
+	uint32_t	data_csum;
+	uint16_t	window;
+	uint16_t	source_port;
+	uint16_t	dest_port;
+	uint16_t	append_cnt;
+	uint16_t	mss;
+	
+};
+SLIST_HEAD(lro_head, lro_entry);
+
+struct lro_ctrl {
+	struct ifnet	*ifp;
+	int		lro_queued;
+	int		lro_flushed;
+	int		lro_bad_csum;
+	int		lro_cnt;
+
+	struct lro_head	lro_active;
+	struct lro_head	lro_free;
+};
+
+
+int tcp_lro_init(struct lro_ctrl *);
+void tcp_lro_free(struct lro_ctrl *);
+void tcp_lro_flush(struct lro_ctrl *, struct lro_entry *);
+int tcp_lro_rx(struct lro_ctrl *, struct mbuf *, uint32_t);
+
+/* Number of LRO entries - these are per rx queue */
+#define LRO_ENTRIES			8
+
+#endif /* _TCP_LRO_H_ */