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