1 /* $OpenBSD: irq_work.h,v 1.9 2022/07/27 07:08:34 jsg Exp $ */
2 /*
3 * Copyright (c) 2015 Mark Kettenis
4 *
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 */
17
18 #ifndef _LINUX_IRQ_WORK_H
19 #define _LINUX_IRQ_WORK_H
20
21 #include <sys/param.h>
22 #include <sys/systm.h>
23 #include <sys/task.h>
24
25 #include <linux/llist.h>
26
27 struct workqueue_struct;
28
29 extern struct workqueue_struct *system_wq;
30
31 struct irq_node {
32 struct llist_node llist;
33 };
34
35 struct irq_work {
36 struct task task;
37 struct taskq *tq;
38 struct irq_node node;
39 };
40
41 typedef void (*irq_work_func_t)(struct irq_work *);
42
43 static inline void
init_irq_work(struct irq_work * work,irq_work_func_t func)44 init_irq_work(struct irq_work *work, irq_work_func_t func)
45 {
46 work->tq = (struct taskq *)system_wq;
47 task_set(&work->task, (void (*)(void *))func, work);
48 }
49
50 static inline bool
irq_work_queue(struct irq_work * work)51 irq_work_queue(struct irq_work *work)
52 {
53 return task_add(work->tq, &work->task);
54 }
55
56 static inline void
irq_work_sync(struct irq_work * work)57 irq_work_sync(struct irq_work *work)
58 {
59 taskq_barrier(work->tq);
60 }
61
62 #endif
63