1/*-
 2 * Copyright (c) 2010-2011 Juniper Networks, Inc.
 3 * All rights reserved.
 4 *
 5 * This software was developed by Robert N. M. Watson under contract
 6 * to Juniper Networks, Inc.
 7 *
 8 * Redistribution and use in source and binary forms, with or without
 9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30#ifndef _NETINET_IN_RSS_H_
31#define	_NETINET_IN_RSS_H_
32
33#include <netinet/in.h>		/* in_addr_t */
34
35/*
36 * Network stack interface to generate a hash for a protocol tuple.
37 */
38uint32_t	rss_hash_ip4_4tuple(struct in_addr src, u_short srcport,
39		    struct in_addr dst, u_short dstport);
40uint32_t	rss_hash_ip4_2tuple(struct in_addr src, struct in_addr dst);
41
42/*
43 * Functions to calculate a software RSS hash for a given mbuf or
44 * packet detail.
45 */
46int		rss_mbuf_software_hash_v4(const struct mbuf *m, int dir,
47		    uint32_t *hashval, uint32_t *hashtype);
48int		rss_proto_software_hash_v4(struct in_addr src,
49		    struct in_addr dst, u_short src_port, u_short dst_port,
50		    int proto, uint32_t *hashval,
51		    uint32_t *hashtype);
52struct mbuf *	rss_soft_m2cpuid_v4(struct mbuf *m, uintptr_t source,
53		    u_int *cpuid);
54uint32_t	xps_proto_software_hash_v4(struct in_addr s, struct in_addr d,
55		    u_short sp, u_short dp, int proto, uint32_t *hashtype);
56
57#endif /* !_NETINET_IN_RSS_H_ */