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e360adbe PZ |
1 | #ifndef _LINUX_IRQ_WORK_H |
2 | #define _LINUX_IRQ_WORK_H | |
3 | ||
38aaf809 HY |
4 | #include <linux/llist.h> |
5 | ||
bc6679ae FW |
6 | /* |
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 | ||
e360adbe | 20 | struct irq_work { |
38aaf809 HY |
21 | unsigned long flags; |
22 | struct llist_node llnode; | |
e360adbe PZ |
23 | void (*func)(struct irq_work *); |
24 | }; | |
25 | ||
26 | static inline | |
38aaf809 | 27 | void init_irq_work(struct irq_work *work, void (*func)(struct irq_work *)) |
e360adbe | 28 | { |
38aaf809 HY |
29 | work->flags = 0; |
30 | work->func = func; | |
e360adbe PZ |
31 | } |
32 | ||
6a02ad66 PZ |
33 | #define DEFINE_IRQ_WORK(name, _f) struct irq_work name = { .func = (_f), } |
34 | ||
cd578abb | 35 | bool irq_work_queue(struct irq_work *work); |
47885016 FW |
36 | |
37 | #ifdef CONFIG_SMP | |
38 | bool irq_work_queue_on(struct irq_work *work, int cpu); | |
39 | #endif | |
40 | ||
e360adbe | 41 | void irq_work_run(void); |
76a33061 | 42 | void irq_work_tick(void); |
38aaf809 | 43 | void irq_work_sync(struct irq_work *work); |
e360adbe | 44 | |
00b42959 | 45 | #ifdef CONFIG_IRQ_WORK |
c5c38ef3 PZ |
46 | #include <asm/irq_work.h> |
47 | ||
00b42959 FW |
48 | bool irq_work_needs_cpu(void); |
49 | #else | |
fe8d5261 | 50 | static inline bool irq_work_needs_cpu(void) { return false; } |
00b42959 FW |
51 | #endif |
52 | ||
e360adbe | 53 | #endif /* _LINUX_IRQ_WORK_H */ |