Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _LINUX_IRQ_WORK_H
3#define _LINUX_IRQ_WORK_H
4
5#include <linux/smp_types.h>
6
7/*
8 * An entry can be in one of four states:
9 *
10 * free NULL, 0 -> {claimed} : free to be used
11 * claimed NULL, 3 -> {pending} : claimed to be enqueued
12 * pending next, 3 -> {busy} : queued, pending callback
13 * busy NULL, 2 -> {free, claimed} : callback in progress, can be claimed
14 */
15
16struct irq_work {
17 struct __call_single_node node;
18 void (*func)(struct irq_work *);
19};
20
21#define __IRQ_WORK_INIT(_func, _flags) (struct irq_work){ \
22 .node = { .u_flags = (_flags), }, \
23 .func = (_func), \
24}
25
26#define IRQ_WORK_INIT(_func) __IRQ_WORK_INIT(_func, 0)
27#define IRQ_WORK_INIT_LAZY(_func) __IRQ_WORK_INIT(_func, IRQ_WORK_LAZY)
28#define IRQ_WORK_INIT_HARD(_func) __IRQ_WORK_INIT(_func, IRQ_WORK_HARD_IRQ)
29
30#define DEFINE_IRQ_WORK(name, _f) \
31 struct irq_work name = IRQ_WORK_INIT(_f)
32
33static inline
34void init_irq_work(struct irq_work *work, void (*func)(struct irq_work *))
35{
36 *work = IRQ_WORK_INIT(func);
37}
38
39static inline bool irq_work_is_pending(struct irq_work *work)
40{
41 return atomic_read(&work->node.a_flags) & IRQ_WORK_PENDING;
42}
43
44static inline bool irq_work_is_busy(struct irq_work *work)
45{
46 return atomic_read(&work->node.a_flags) & IRQ_WORK_BUSY;
47}
48
49bool irq_work_queue(struct irq_work *work);
50bool irq_work_queue_on(struct irq_work *work, int cpu);
51
52void irq_work_tick(void);
53void irq_work_sync(struct irq_work *work);
54
55#ifdef CONFIG_IRQ_WORK
56#include <asm/irq_work.h>
57
58void irq_work_run(void);
59bool irq_work_needs_cpu(void);
60void irq_work_single(void *arg);
61#else
62static inline bool irq_work_needs_cpu(void) { return false; }
63static inline void irq_work_run(void) { }
64static inline void irq_work_single(void *arg) { }
65#endif
66
67#endif /* _LINUX_IRQ_WORK_H */