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Peter Zijlstrae360adb2010-10-14 14:01:34 +08001#ifndef _LINUX_IRQ_WORK_H
2#define _LINUX_IRQ_WORK_H
3
Huang Ying38aaf802011-09-08 14:00:46 +08004#include <linux/llist.h>
5
Frederic Weisbeckerbc6679a2012-10-19 16:43:41 -04006/*
7 * An entry can be in one of four states:
8 *
9 * free NULL, 0 -> {claimed} : free to be used
10 * claimed NULL, 3 -> {pending} : claimed to be enqueued
11 * pending next, 3 -> {busy} : queued, pending callback
12 * busy NULL, 2 -> {free, claimed} : callback in progress, can be claimed
13 */
14
15#define IRQ_WORK_PENDING 1UL
16#define IRQ_WORK_BUSY 2UL
17#define IRQ_WORK_FLAGS 3UL
18#define IRQ_WORK_LAZY 4UL /* Doesn't want IPI, wait for tick */
19
Peter Zijlstrae360adb2010-10-14 14:01:34 +080020struct irq_work {
Huang Ying38aaf802011-09-08 14:00:46 +080021 unsigned long flags;
22 struct llist_node llnode;
Peter Zijlstrae360adb2010-10-14 14:01:34 +080023 void (*func)(struct irq_work *);
24};
25
26static inline
Huang Ying38aaf802011-09-08 14:00:46 +080027void init_irq_work(struct irq_work *work, void (*func)(struct irq_work *))
Peter Zijlstrae360adb2010-10-14 14:01:34 +080028{
Huang Ying38aaf802011-09-08 14:00:46 +080029 work->flags = 0;
30 work->func = func;
Peter Zijlstrae360adb2010-10-14 14:01:34 +080031}
32
Peter Zijlstra6a02ad662014-02-03 18:11:08 +010033#define DEFINE_IRQ_WORK(name, _f) struct irq_work name = { .func = (_f), }
34
Peter Zijlstracd578ab2014-02-11 16:01:16 +010035bool irq_work_queue(struct irq_work *work);
Frederic Weisbecker47885012014-05-08 01:37:48 +020036
37#ifdef CONFIG_SMP
38bool irq_work_queue_on(struct irq_work *work, int cpu);
39#endif
40
Peter Zijlstrae360adb2010-10-14 14:01:34 +080041void irq_work_run(void);
Frederic Weisbecker76a33062014-08-16 18:37:19 +020042void irq_work_tick(void);
Huang Ying38aaf802011-09-08 14:00:46 +080043void irq_work_sync(struct irq_work *work);
Peter Zijlstrae360adb2010-10-14 14:01:34 +080044
Frederic Weisbecker00b42952012-11-07 21:03:07 +010045#ifdef CONFIG_IRQ_WORK
Peter Zijlstrac5c38ef2014-09-06 15:43:02 +020046#include <asm/irq_work.h>
47
Frederic Weisbecker00b42952012-11-07 21:03:07 +010048bool irq_work_needs_cpu(void);
49#else
James Hoganfe8d5262013-03-22 15:04:37 -070050static inline bool irq_work_needs_cpu(void) { return false; }
Frederic Weisbecker00b42952012-11-07 21:03:07 +010051#endif
52
Peter Zijlstrae360adb2010-10-14 14:01:34 +080053#endif /* _LINUX_IRQ_WORK_H */