136 lines
4.3 KiB
C
136 lines
4.3 KiB
C
/*
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* Copyright (c) 2015-2018 Apple Inc. All rights reserved.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
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*
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* This file contains Original Code and/or Modifications of Original Code
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* as defined in and that are subject to the Apple Public Source License
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* Version 2.0 (the 'License'). You may not use this file except in
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* compliance with the License. The rights granted to you under the License
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* may not be used to create, or enable the creation or redistribution of,
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* unlawful or unlicensed copies of an Apple operating system, or to
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* circumvent, violate, or enable the circumvention or violation of, any
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* terms of an Apple operating system software license agreement.
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*
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* Please obtain a copy of the License at
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* http://www.opensource.apple.com/apsl/ and read it before using this file.
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*
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* The Original Code and all software distributed under the License are
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* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
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* Please see the License for the specific language governing rights and
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* limitations under the License.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
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*/
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/*
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* Copyright (C) 2013-2014 Vincenzo Maffione. 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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#include <stdint.h>
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#include <sys/cdefs.h> /* prerequisite */
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <skywalk/nexus/nexus_mbq.h>
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static void __nx_mbq_init(struct nx_mbq *q, uint32_t, lck_grp_t *lck_grp);
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__attribute__((always_inline))
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static inline void
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__nx_mbq_init(struct nx_mbq *q, uint32_t lim, lck_grp_t *lck_grp)
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{
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bzero(q, sizeof(*q));
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_qinit(&q->nx_mbq_q, Q_DROPTAIL, lim, QP_MBUF);
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q->nx_mbq_grp = lck_grp;
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}
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void
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nx_mbq_safe_init(struct __kern_channel_ring *kr, struct nx_mbq *q,
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uint32_t lim, lck_grp_t *lck_grp, lck_attr_t *lck_attr)
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{
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q->nx_mbq_kring = kr;
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__nx_mbq_init(q, lim, lck_grp);
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lck_mtx_init(&q->nx_mbq_lock, lck_grp, lck_attr);
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}
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void
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nx_mbq_init(struct nx_mbq *q, uint32_t lim)
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{
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__nx_mbq_init(q, lim, NULL);
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}
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void
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nx_mbq_concat(struct nx_mbq *q1, struct nx_mbq *q2)
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{
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uint32_t qlen;
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uint64_t qsize;
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classq_pkt_t first = CLASSQ_PKT_INITIALIZER(first);
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classq_pkt_t last = CLASSQ_PKT_INITIALIZER(last);
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/* caller is responsible for locking */
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if (!nx_mbq_empty(q2)) {
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_getq_all(&q2->nx_mbq_q, &first, &last, &qlen, &qsize);
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ASSERT(first.cp_mbuf != NULL && last.cp_mbuf != NULL);
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_addq_multi(&q1->nx_mbq_q, &first, &last, qlen, qsize);
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ASSERT(nx_mbq_empty(q2));
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}
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}
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boolean_t
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nx_mbq_empty(struct nx_mbq *q)
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{
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return qempty(&q->nx_mbq_q) && qhead(&q->nx_mbq_q) == NULL;
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}
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void
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nx_mbq_purge(struct nx_mbq *q)
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{
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_flushq(&q->nx_mbq_q);
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}
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void
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nx_mbq_safe_purge(struct nx_mbq *q)
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{
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nx_mbq_lock(q);
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_flushq(&q->nx_mbq_q);
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nx_mbq_unlock(q);
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}
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void
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nx_mbq_safe_destroy(struct nx_mbq *q)
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{
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VERIFY(nx_mbq_empty(q));
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lck_mtx_destroy(&q->nx_mbq_lock, q->nx_mbq_grp);
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}
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void
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nx_mbq_destroy(struct nx_mbq *q)
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{
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VERIFY(nx_mbq_empty(q));
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}
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