110 lines
3 KiB
C
110 lines
3 KiB
C
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/*
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* Copyright (c) 2019 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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#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_pktq.h>
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static void __nx_pktq_init(struct nx_pktq *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_pktq_init(struct nx_pktq *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_pktq_q, Q_DROPTAIL, lim, QP_PACKET);
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q->nx_pktq_grp = lck_grp;
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}
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void
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nx_pktq_safe_init(struct __kern_channel_ring *kr, struct nx_pktq *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_pktq_kring = kr;
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__nx_pktq_init(q, lim, lck_grp);
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lck_mtx_init(&q->nx_pktq_lock, lck_grp, lck_attr);
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}
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void
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nx_pktq_init(struct nx_pktq *q, uint32_t lim)
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{
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__nx_pktq_init(q, lim, NULL);
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}
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void
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nx_pktq_concat(struct nx_pktq *q1, struct nx_pktq *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_pktq_empty(q2)) {
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_getq_all(&q2->nx_pktq_q, &first, &last, &qlen, &qsize);
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ASSERT(first.cp_kpkt != NULL && last.cp_kpkt != NULL);
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_addq_multi(&q1->nx_pktq_q, &first, &last, qlen, qsize);
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ASSERT(nx_pktq_empty(q2));
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}
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}
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boolean_t
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nx_pktq_empty(struct nx_pktq *q)
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{
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return qempty(&q->nx_pktq_q) && qhead(&q->nx_pktq_q) == NULL;
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}
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void
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nx_pktq_purge(struct nx_pktq *q)
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{
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_flushq(&q->nx_pktq_q);
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}
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void
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nx_pktq_safe_purge(struct nx_pktq *q)
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{
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nx_pktq_lock(q);
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_flushq(&q->nx_pktq_q);
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nx_pktq_unlock(q);
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}
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void
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nx_pktq_safe_destroy(struct nx_pktq *q)
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{
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VERIFY(nx_pktq_empty(q));
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lck_mtx_destroy(&q->nx_pktq_lock, q->nx_pktq_grp);
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}
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void
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nx_pktq_destroy(struct nx_pktq *q)
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{
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VERIFY(nx_pktq_empty(q));
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}
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