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85 lines
2.6 KiB
C
85 lines
2.6 KiB
C
/*
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* Copyright (c) 2016 Adrian Chadd <adrian@FreeBSD.org>
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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
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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 __LIBRSS_H__
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#define __LIBRSS_H__
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struct rss_config {
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int rss_ncpus;
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int rss_nbuckets;
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int rss_basecpu;
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int *rss_bucket_map;
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};
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typedef enum {
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RSS_BUCKET_TYPE_NONE = 0,
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RSS_BUCKET_TYPE_KERNEL_ALL = 1,
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RSS_BUCKET_TYPE_KERNEL_TX = 2,
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RSS_BUCKET_TYPE_KERNEL_RX = 3,
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RSS_BUCKET_TYPE_MAX = 3,
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} rss_bucket_type_t;
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typedef void rss_bucket_rebalance_cb_t(void *arg);
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/*
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* Enable or disable receiving RSS/flowid information on
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* received UDP frames.
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*/
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extern int rss_sock_set_recvrss(int fd, int af, int val);
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/*
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* Fetch RSS configuration information.
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*/
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extern struct rss_config * rss_config_get(void);
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/*
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* Free an RSS configuration structure.
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*/
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extern void rss_config_free(struct rss_config *rc);
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/*
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* Return how many RSS buckets there are.
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*/
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extern int rss_config_get_bucket_count(struct rss_config *rc);
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/*
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* Fetch the cpuset configuration for the given RSS bucket and
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* type.
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*/
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extern int rss_get_bucket_cpuset(struct rss_config *rc,
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rss_bucket_type_t btype, int bucket, cpuset_t *cs);
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/*
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* Set a callback for bucket rebalancing.
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*
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* This will occur in a separate thread context rather than
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* a signal handler.
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*/
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extern int rss_set_bucket_rebalance_cb(rss_bucket_rebalance_cb_t *cb,
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void *cbdata);
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#endif /* __LIBRSS_H__ */
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