1 | /* |
2 | * Copyright (c) 2015-2018 Apple Inc. All rights reserved. |
3 | * |
4 | * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ |
5 | * |
6 | * This file contains Original Code and/or Modifications of Original Code |
7 | * as defined in and that are subject to the Apple Public Source License |
8 | * Version 2.0 (the 'License'). You may not use this file except in |
9 | * compliance with the License. The rights granted to you under the License |
10 | * may not be used to create, or enable the creation or redistribution of, |
11 | * unlawful or unlicensed copies of an Apple operating system, or to |
12 | * circumvent, violate, or enable the circumvention or violation of, any |
13 | * terms of an Apple operating system software license agreement. |
14 | * |
15 | * Please obtain a copy of the License at |
16 | * http://www.opensource.apple.com/apsl/ and read it before using this file. |
17 | * |
18 | * The Original Code and all software distributed under the License are |
19 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER |
20 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
21 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, |
22 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. |
23 | * Please see the License for the specific language governing rights and |
24 | * limitations under the License. |
25 | * |
26 | * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ |
27 | */ |
28 | |
29 | /* |
30 | * Copyright (C) 2013-2014 Vincenzo Maffione. All rights reserved. |
31 | * |
32 | * Redistribution and use in source and binary forms, with or without |
33 | * modification, are permitted provided that the following conditions |
34 | * are met: |
35 | * 1. Redistributions of source code must retain the above copyright |
36 | * notice, this list of conditions and the following disclaimer. |
37 | * 2. Redistributions in binary form must reproduce the above copyright |
38 | * notice, this list of conditions and the following disclaimer in the |
39 | * documentation and/or other materials provided with the distribution. |
40 | * |
41 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
42 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
43 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
44 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
45 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
46 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
47 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
48 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
49 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
50 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
51 | * SUCH DAMAGE. |
52 | */ |
53 | |
54 | |
55 | #include <stdint.h> |
56 | #include <sys/cdefs.h> /* prerequisite */ |
57 | #include <sys/types.h> |
58 | #include <sys/param.h> |
59 | #include <sys/systm.h> |
60 | #include <skywalk/nexus/nexus_mbq.h> |
61 | |
62 | static void __nx_mbq_init(struct nx_mbq *q, uint32_t, lck_grp_t *lck_grp); |
63 | |
64 | __attribute__((always_inline)) |
65 | static inline void |
66 | __nx_mbq_init(struct nx_mbq *q, uint32_t lim, lck_grp_t *lck_grp) |
67 | { |
68 | bzero(s: q, n: sizeof(*q)); |
69 | _qinit(&q->nx_mbq_q, Q_DROPTAIL, lim, QP_MBUF); |
70 | q->nx_mbq_grp = lck_grp; |
71 | } |
72 | |
73 | void |
74 | nx_mbq_safe_init(struct __kern_channel_ring *kr, struct nx_mbq *q, |
75 | uint32_t lim, lck_grp_t *lck_grp, lck_attr_t *lck_attr) |
76 | { |
77 | q->nx_mbq_kring = kr; |
78 | __nx_mbq_init(q, lim, lck_grp); |
79 | lck_mtx_init(lck: &q->nx_mbq_lock, grp: lck_grp, attr: lck_attr); |
80 | } |
81 | |
82 | void |
83 | nx_mbq_init(struct nx_mbq *q, uint32_t lim) |
84 | { |
85 | __nx_mbq_init(q, lim, NULL); |
86 | } |
87 | |
88 | void |
89 | nx_mbq_concat(struct nx_mbq *q1, struct nx_mbq *q2) |
90 | { |
91 | uint32_t qlen; |
92 | uint64_t qsize; |
93 | classq_pkt_t first = CLASSQ_PKT_INITIALIZER(first); |
94 | classq_pkt_t last = CLASSQ_PKT_INITIALIZER(last); |
95 | |
96 | /* caller is responsible for locking */ |
97 | if (!nx_mbq_empty(q2)) { |
98 | _getq_all(&q2->nx_mbq_q, &first, &last, &qlen, &qsize); |
99 | ASSERT(first.cp_mbuf != NULL && last.cp_mbuf != NULL); |
100 | _addq_multi(&q1->nx_mbq_q, &first, &last, qlen, qsize); |
101 | ASSERT(nx_mbq_empty(q2)); |
102 | } |
103 | } |
104 | |
105 | boolean_t |
106 | nx_mbq_empty(struct nx_mbq *q) |
107 | { |
108 | return qempty(&q->nx_mbq_q) && qhead(&q->nx_mbq_q) == NULL; |
109 | } |
110 | |
111 | void |
112 | nx_mbq_purge(struct nx_mbq *q) |
113 | { |
114 | _flushq(&q->nx_mbq_q); |
115 | } |
116 | |
117 | void |
118 | nx_mbq_safe_purge(struct nx_mbq *q) |
119 | { |
120 | nx_mbq_lock(q); |
121 | _flushq(&q->nx_mbq_q); |
122 | nx_mbq_unlock(q); |
123 | } |
124 | |
125 | void |
126 | nx_mbq_safe_destroy(struct nx_mbq *q) |
127 | { |
128 | VERIFY(nx_mbq_empty(q)); |
129 | lck_mtx_destroy(lck: &q->nx_mbq_lock, grp: q->nx_mbq_grp); |
130 | } |
131 | |
132 | void |
133 | nx_mbq_destroy(struct nx_mbq *q) |
134 | { |
135 | VERIFY(nx_mbq_empty(q)); |
136 | } |
137 | |