FreeBSD/Linux Kernel Cross Reference
sys/sys/gtaskqueue.h
1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2014 Jeffrey Roberson <jeff@freebsd.org>
5 * Copyright (c) 2016 Matthew Macy <mmacy@mattmacy.io>
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * $FreeBSD$
30 */
31
32 #ifndef _SYS_GTASKQUEUE_H_
33 #define _SYS_GTASKQUEUE_H_
34 #include <sys/taskqueue.h>
35
36 #ifndef _KERNEL
37 #error "no user-serviceable parts inside"
38 #endif
39
40 struct gtaskqueue;
41
42 /*
43 * Taskqueue groups. Manages dynamic thread groups and irq binding for
44 * device and other tasks.
45 */
46
47 void gtaskqueue_block(struct gtaskqueue *queue);
48 void gtaskqueue_unblock(struct gtaskqueue *queue);
49
50 int gtaskqueue_cancel(struct gtaskqueue *queue, struct gtask *gtask);
51 void gtaskqueue_drain(struct gtaskqueue *queue, struct gtask *task);
52 void gtaskqueue_drain_all(struct gtaskqueue *queue);
53
54 void grouptask_block(struct grouptask *grouptask);
55 void grouptask_unblock(struct grouptask *grouptask);
56 int grouptaskqueue_enqueue(struct gtaskqueue *queue, struct gtask *task);
57
58 void taskqgroup_attach(struct taskqgroup *qgroup, struct grouptask *grptask,
59 void *uniq, int irq, const char *name);
60 int taskqgroup_attach_cpu(struct taskqgroup *qgroup,
61 struct grouptask *grptask, void *uniq, int cpu, int irq,
62 const char *name);
63 void taskqgroup_detach(struct taskqgroup *qgroup, struct grouptask *gtask);
64 struct taskqgroup *taskqgroup_create(const char *name);
65 void taskqgroup_destroy(struct taskqgroup *qgroup);
66 int taskqgroup_adjust(struct taskqgroup *qgroup, int cnt, int stride);
67
68 #define TASK_ENQUEUED 0x1
69 #define TASK_SKIP_WAKEUP 0x2
70 #define TASK_NOENQUEUE 0x4
71
72 #define GTASK_INIT(gtask, flags, priority, func, context) do { \
73 (gtask)->ta_flags = flags; \
74 (gtask)->ta_priority = (priority); \
75 (gtask)->ta_func = (func); \
76 (gtask)->ta_context = (context); \
77 } while (0)
78
79 #define GROUPTASK_INIT(gtask, priority, func, context) \
80 GTASK_INIT(&(gtask)->gt_task, TASK_SKIP_WAKEUP, priority, func, context)
81
82 #define GROUPTASK_ENQUEUE(gtask) \
83 grouptaskqueue_enqueue((gtask)->gt_taskqueue, &(gtask)->gt_task)
84
85 #define TASKQGROUP_DECLARE(name) \
86 extern struct taskqgroup *qgroup_##name
87
88 #define TASKQGROUP_DEFINE(name, cnt, stride) \
89 \
90 struct taskqgroup *qgroup_##name; \
91 \
92 static void \
93 taskqgroup_define_##name(void *arg) \
94 { \
95 qgroup_##name = taskqgroup_create(#name); \
96 } \
97 \
98 SYSINIT(taskqgroup_##name, SI_SUB_TASKQ, SI_ORDER_FIRST, \
99 taskqgroup_define_##name, NULL); \
100 \
101 static void \
102 taskqgroup_adjust_##name(void *arg) \
103 { \
104 taskqgroup_adjust(qgroup_##name, (cnt), (stride)); \
105 } \
106 \
107 SYSINIT(taskqgroup_adj_##name, SI_SUB_SMP, SI_ORDER_ANY, \
108 taskqgroup_adjust_##name, NULL)
109
110 TASKQGROUP_DECLARE(net);
111 TASKQGROUP_DECLARE(softirq);
112
113 #endif /* !_SYS_GTASKQUEUE_H_ */
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