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015f8cc5b0
Signed-off-by: Eric Joyner <erj@FreeBSD.org> MFC after: 3 days Sponsored by: Intel Corporation Differential Revision: https://reviews.freebsd.org/D44003
117 lines
4.6 KiB
C
117 lines
4.6 KiB
C
/* SPDX-License-Identifier: BSD-3-Clause */
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/* Copyright (c) 2024, 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 are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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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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* 3. Neither the name of the Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND 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 COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/**
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* @file ice_rss.h
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* @brief default RSS values if kernel RSS is not enabled
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*
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* This header includes default definitions for RSS functionality if the
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* kernel RSS interface is not enabled. This allows main driver code to avoid
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* having to check the RSS ifdef throughout, but instead just use the RSS
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* definitions, as they will fall back to these defaults when the kernel
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* interface is disabled.
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*/
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#ifndef _ICE_RSS_H_
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#define _ICE_RSS_H_
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#ifdef RSS
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// We have the kernel RSS interface available
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#include <net/rss_config.h>
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/* Make sure our key size buffer has enough space to store the kernel RSS key */
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CTASSERT(ICE_AQC_GET_SET_RSS_KEY_DATA_RSS_KEY_SIZE >= RSS_KEYSIZE);
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#else
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/* The kernel RSS interface is not enabled. Use suitable defaults for the RSS
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* configuration functions.
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*
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* The RSS hash key will be a pre-generated random key.
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* The number of buckets will just match the number of CPUs.
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* The lookup table will be assigned using round-robin with no indirection.
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* The RSS hash configuration will be set to suitable defaults.
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*/
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#define RSS_HASHTYPE_RSS_IPV4 (1 << 1) /* IPv4 2-tuple */
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#define RSS_HASHTYPE_RSS_TCP_IPV4 (1 << 2) /* TCPv4 4-tuple */
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#define RSS_HASHTYPE_RSS_IPV6 (1 << 3) /* IPv6 2-tuple */
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#define RSS_HASHTYPE_RSS_TCP_IPV6 (1 << 4) /* TCPv6 4-tuple */
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#define RSS_HASHTYPE_RSS_IPV6_EX (1 << 5) /* IPv6 2-tuple + ext hdrs */
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#define RSS_HASHTYPE_RSS_TCP_IPV6_EX (1 << 6) /* TCPv6 4-tiple + ext hdrs */
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#define RSS_HASHTYPE_RSS_UDP_IPV4 (1 << 7) /* IPv4 UDP 4-tuple */
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#define RSS_HASHTYPE_RSS_UDP_IPV6 (1 << 9) /* IPv6 UDP 4-tuple */
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#define RSS_HASHTYPE_RSS_UDP_IPV6_EX (1 << 10) /* IPv6 UDP 4-tuple + ext hdrs */
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#define ICE_DEFAULT_RSS_HASH_CONFIG \
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((u_int)(RSS_HASHTYPE_RSS_IPV4 | \
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RSS_HASHTYPE_RSS_TCP_IPV4 | \
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RSS_HASHTYPE_RSS_UDP_IPV4 | \
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RSS_HASHTYPE_RSS_IPV6 | \
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RSS_HASHTYPE_RSS_TCP_IPV6 | \
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RSS_HASHTYPE_RSS_UDP_IPV6))
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#define rss_getkey(key) ice_get_default_rss_key(key)
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#define rss_getnumbuckets() (mp_ncpus)
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#define rss_get_indirection_to_bucket(index) (index)
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#define rss_gethashconfig() (ICE_DEFAULT_RSS_HASH_CONFIG)
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/**
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* rss_hash2bucket - Determine the bucket for a given hash value
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* @hash_val: the hash value to use
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* @hash_type: the type of the hash
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* @bucket_id: on success, updated with the bucket
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*
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* This function simply verifies that the hash type is known. If it is, then
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* we forward the hash value directly as the bucket id. If the hash type is
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* unknown, we return -1.
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*
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* This is the simplest mechanism for converting a hash value into a bucket,
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* and does not support any form of indirection table.
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*/
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static inline int
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rss_hash2bucket(uint32_t hash_val, uint32_t hash_type, uint32_t *bucket_id)
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{
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switch (hash_type) {
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case M_HASHTYPE_RSS_IPV4:
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case M_HASHTYPE_RSS_TCP_IPV4:
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case M_HASHTYPE_RSS_UDP_IPV4:
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case M_HASHTYPE_RSS_IPV6:
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case M_HASHTYPE_RSS_TCP_IPV6:
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case M_HASHTYPE_RSS_UDP_IPV6:
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*bucket_id = hash_val;
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return (0);
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default:
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return (-1);
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}
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}
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#endif /* !RSS */
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#endif /* _ICE_COMMON_COMPAT_H_ */
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