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freebsd
GitHub Repository: freebsd/freebsd-src
 Path: blob/main/sys/netinet/in_rss.h
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/*-

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 * Copyright (c) 2010-2011 Juniper Networks, Inc.

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 * All rights reserved.

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 *

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 * This software was developed by Robert N. M. Watson under contract

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 * to Juniper Networks, Inc.

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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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#ifndef _NETINET_IN_RSS_H_

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#define	_NETINET_IN_RSS_H_

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#include <netinet/in.h>		/* in_addr_t */

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/*

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 * Network stack interface to generate a hash for a protocol tuple.

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 */

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uint32_t	rss_hash_ip4_4tuple(struct in_addr src, u_short srcport,

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		    struct in_addr dst, u_short dstport);

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uint32_t	rss_hash_ip4_2tuple(struct in_addr src, struct in_addr dst);

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/*

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 * Functions to calculate a software RSS hash for a given mbuf or

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 * packet detail.

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 */

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int		rss_mbuf_software_hash_v4(const struct mbuf *m, int dir,

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		    uint32_t *hashval, uint32_t *hashtype);

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int		rss_proto_software_hash_v4(struct in_addr src,

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		    struct in_addr dst, u_short src_port, u_short dst_port,

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		    int proto, uint32_t *hashval,

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		    uint32_t *hashtype);

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struct mbuf *	rss_soft_m2cpuid_v4(struct mbuf *m, uintptr_t source,

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		    u_int *cpuid);

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uint32_t	xps_proto_software_hash_v4(struct in_addr s, struct in_addr d,

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		    u_short sp, u_short dp, int proto, uint32_t *hashtype);

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#endif /* !_NETINET_IN_RSS_H_ */

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