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 * $FreeBSD$ 30 */ 31 32 #ifndef _NETINET_IN_RSS_H_ 33 #define _NETINET_IN_RSS_H_ 34 35 #include <netinet/in.h> /* in_addr_t */ 36 37 /* 38 * Network stack interface to generate a hash for a protocol tuple. 39 */ 40 uint32_t rss_hash_ip4_4tuple(struct in_addr src, u_short srcport, 41 struct in_addr dst, u_short dstport); 42 uint32_t rss_hash_ip4_2tuple(struct in_addr src, struct in_addr dst); 43 44 /* 45 * Functions to calculate a software RSS hash for a given mbuf or 46 * packet detail. 47 */ 48 int rss_mbuf_software_hash_v4(const struct mbuf *m, int dir, 49 uint32_t *hashval, uint32_t *hashtype); 50 int rss_proto_software_hash_v4(struct in_addr src, 51 struct in_addr dst, u_short src_port, u_short dst_port, 52 int proto, uint32_t *hashval, 53 uint32_t *hashtype); 54 struct mbuf * rss_soft_m2cpuid(struct mbuf *m, uintptr_t source, 55 u_int *cpuid); 56 57 #endif /* !_NETINET_IN_RSS_H_ */ 58