1 | /* |
2 | * Copyright (c) 2019 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 | #include <stdint.h> |
29 | #include <sys/cdefs.h> /* prerequisite */ |
30 | #include <sys/types.h> |
31 | #include <sys/param.h> |
32 | #include <sys/systm.h> |
33 | #include <skywalk/nexus/nexus_pktq.h> |
34 | |
35 | static void __nx_pktq_init(struct nx_pktq *q, uint32_t, lck_grp_t *lck_grp); |
36 | |
37 | __attribute__((always_inline)) |
38 | static inline void |
39 | __nx_pktq_init(struct nx_pktq *q, uint32_t lim, lck_grp_t *lck_grp) |
40 | { |
41 | bzero(s: q, n: sizeof(*q)); |
42 | _qinit(&q->nx_pktq_q, Q_DROPTAIL, lim, QP_PACKET); |
43 | q->nx_pktq_grp = lck_grp; |
44 | } |
45 | |
46 | void |
47 | nx_pktq_safe_init(struct __kern_channel_ring *kr, struct nx_pktq *q, |
48 | uint32_t lim, lck_grp_t *lck_grp, lck_attr_t *lck_attr) |
49 | { |
50 | q->nx_pktq_kring = kr; |
51 | __nx_pktq_init(q, lim, lck_grp); |
52 | lck_mtx_init(lck: &q->nx_pktq_lock, grp: lck_grp, attr: lck_attr); |
53 | } |
54 | |
55 | void |
56 | nx_pktq_init(struct nx_pktq *q, uint32_t lim) |
57 | { |
58 | __nx_pktq_init(q, lim, NULL); |
59 | } |
60 | |
61 | void |
62 | nx_pktq_concat(struct nx_pktq *q1, struct nx_pktq *q2) |
63 | { |
64 | uint32_t qlen; |
65 | uint64_t qsize; |
66 | classq_pkt_t first = CLASSQ_PKT_INITIALIZER(first); |
67 | classq_pkt_t last = CLASSQ_PKT_INITIALIZER(last); |
68 | |
69 | /* caller is responsible for locking */ |
70 | if (!nx_pktq_empty(q: q2)) { |
71 | _getq_all(&q2->nx_pktq_q, &first, &last, &qlen, &qsize); |
72 | ASSERT(first.cp_kpkt != NULL && last.cp_kpkt != NULL); |
73 | _addq_multi(&q1->nx_pktq_q, &first, &last, qlen, qsize); |
74 | ASSERT(nx_pktq_empty(q2)); |
75 | } |
76 | } |
77 | |
78 | boolean_t |
79 | nx_pktq_empty(struct nx_pktq *q) |
80 | { |
81 | return qempty(&q->nx_pktq_q) && qhead(&q->nx_pktq_q) == NULL; |
82 | } |
83 | |
84 | void |
85 | nx_pktq_purge(struct nx_pktq *q) |
86 | { |
87 | _flushq(&q->nx_pktq_q); |
88 | } |
89 | |
90 | void |
91 | nx_pktq_safe_purge(struct nx_pktq *q) |
92 | { |
93 | nx_pktq_lock(q); |
94 | _flushq(&q->nx_pktq_q); |
95 | nx_pktq_unlock(q); |
96 | } |
97 | |
98 | void |
99 | nx_pktq_safe_destroy(struct nx_pktq *q) |
100 | { |
101 | VERIFY(nx_pktq_empty(q)); |
102 | lck_mtx_destroy(lck: &q->nx_pktq_lock, grp: q->nx_pktq_grp); |
103 | } |
104 | |
105 | void |
106 | nx_pktq_destroy(struct nx_pktq *q) |
107 | { |
108 | VERIFY(nx_pktq_empty(q)); |
109 | } |
110 | |