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sys/dev/ice/ice_rss.h
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/* SPDX-License-Identifier: BSD-3-Clause */ | |||||
/* Copyright (c) 2020, 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. Redistributions in binary form must reproduce the above copyright | |||||
* notice, this list of conditions and the following disclaimer in the | |||||
* documentation and/or other materials provided with the distribution. | |||||
* | |||||
* 3. 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. | |||||
*/ | |||||
/*$FreeBSD$*/ | |||||
/** | |||||
* @file ice_rss.h | |||||
* @brief default RSS values if kernel RSS is not enabled | |||||
* | |||||
* This header includes default definitions for RSS functionality if the | |||||
* kernel RSS interface is not enabled. This allows main driver code to avoid | |||||
* having to check the RSS ifdef throughout, but instead just use the RSS | |||||
* definitions, as they will fall back to these defaults when the kernel | |||||
* interface is disabled. | |||||
*/ | |||||
#ifndef _ICE_RSS_H_ | |||||
#define _ICE_RSS_H_ | |||||
#ifdef RSS | |||||
// We have the kernel RSS interface available | |||||
#include <net/rss_config.h> | |||||
/* Make sure our key size buffer has enough space to store the kernel RSS key */ | |||||
CTASSERT(ICE_AQC_GET_SET_RSS_KEY_DATA_RSS_KEY_SIZE >= RSS_KEYSIZE); | |||||
#else | |||||
/* The kernel RSS interface is not enabled. Use suitable defaults for the RSS | |||||
* configuration functions. | |||||
* | |||||
* The RSS hash key will be a pre-generated random key. | |||||
* The number of buckets will just match the number of CPUs. | |||||
* The lookup table will be assigned using round-robin with no indirection. | |||||
* The RSS hash configuration will be set to suitable defaults. | |||||
*/ | |||||
#define RSS_HASHTYPE_RSS_IPV4 (1 << 1) /* IPv4 2-tuple */ | |||||
#define RSS_HASHTYPE_RSS_TCP_IPV4 (1 << 2) /* TCPv4 4-tuple */ | |||||
#define RSS_HASHTYPE_RSS_IPV6 (1 << 3) /* IPv6 2-tuple */ | |||||
#define RSS_HASHTYPE_RSS_TCP_IPV6 (1 << 4) /* TCPv6 4-tuple */ | |||||
#define RSS_HASHTYPE_RSS_IPV6_EX (1 << 5) /* IPv6 2-tuple + ext hdrs */ | |||||
#define RSS_HASHTYPE_RSS_TCP_IPV6_EX (1 << 6) /* TCPv6 4-tiple + ext hdrs */ | |||||
#define RSS_HASHTYPE_RSS_UDP_IPV4 (1 << 7) /* IPv4 UDP 4-tuple */ | |||||
#define RSS_HASHTYPE_RSS_UDP_IPV6 (1 << 9) /* IPv6 UDP 4-tuple */ | |||||
#define RSS_HASHTYPE_RSS_UDP_IPV6_EX (1 << 10) /* IPv6 UDP 4-tuple + ext hdrs */ | |||||
#define ICE_DEFAULT_RSS_HASH_CONFIG \ | |||||
((u_int)(RSS_HASHTYPE_RSS_IPV4 | \ | |||||
RSS_HASHTYPE_RSS_TCP_IPV4 | \ | |||||
RSS_HASHTYPE_RSS_UDP_IPV4 | \ | |||||
RSS_HASHTYPE_RSS_IPV6 | \ | |||||
RSS_HASHTYPE_RSS_TCP_IPV6 | \ | |||||
RSS_HASHTYPE_RSS_UDP_IPV6)) | |||||
#define rss_getkey(key) ice_get_default_rss_key(key) | |||||
#define rss_getnumbuckets() (mp_ncpus) | |||||
#define rss_get_indirection_to_bucket(index) (index) | |||||
#define rss_gethashconfig() (ICE_DEFAULT_RSS_HASH_CONFIG) | |||||
/** | |||||
* rss_hash2bucket - Determine the bucket for a given hash value | |||||
* @hash_val: the hash value to use | |||||
* @hash_type: the type of the hash | |||||
* @bucket_id: on success, updated with the bucket | |||||
* | |||||
* This function simply verifies that the hash type is known. If it is, then | |||||
* we forward the hash value directly as the bucket id. If the hash type is | |||||
* unknown, we return -1. | |||||
* | |||||
* This is the simplest mechanism for converting a hash value into a bucket, | |||||
* and does not support any form of indirection table. | |||||
*/ | |||||
static inline int | |||||
rss_hash2bucket(uint32_t hash_val, uint32_t hash_type, uint32_t *bucket_id) | |||||
{ | |||||
switch (hash_type) { | |||||
case M_HASHTYPE_RSS_IPV4: | |||||
case M_HASHTYPE_RSS_TCP_IPV4: | |||||
case M_HASHTYPE_RSS_UDP_IPV4: | |||||
case M_HASHTYPE_RSS_IPV6: | |||||
case M_HASHTYPE_RSS_TCP_IPV6: | |||||
case M_HASHTYPE_RSS_UDP_IPV6: | |||||
*bucket_id = hash_val; | |||||
return (0); | |||||
default: | |||||
return (-1); | |||||
} | |||||
} | |||||
#endif /* !RSS */ | |||||
#endif /* _ICE_COMMON_COMPAT_H_ */ |