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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
e360adbe PZ |
2 | #ifndef _LINUX_IRQ_WORK_H |
3 | #define _LINUX_IRQ_WORK_H | |
4 | ||
8c4890d1 | 5 | #include <linux/smp_types.h> |
38aaf809 | 6 | |
bc6679ae FW |
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 | ||
e360adbe | 16 | struct irq_work { |
7a9f50a0 | 17 | struct __call_single_node node; |
e360adbe PZ |
18 | void (*func)(struct irq_work *); |
19 | }; | |
20 | ||
7a9f50a0 PZ |
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 | ||
e360adbe | 33 | static inline |
38aaf809 | 34 | void init_irq_work(struct irq_work *work, void (*func)(struct irq_work *)) |
e360adbe | 35 | { |
7a9f50a0 | 36 | *work = IRQ_WORK_INIT(func); |
e360adbe PZ |
37 | } |
38 | ||
7a9f50a0 PZ |
39 | static inline bool irq_work_is_pending(struct irq_work *work) |
40 | { | |
41 | return atomic_read(&work->node.a_flags) & IRQ_WORK_PENDING; | |
153bedba FW |
42 | } |
43 | ||
7a9f50a0 PZ |
44 | static inline bool irq_work_is_busy(struct irq_work *work) |
45 | { | |
46 | return atomic_read(&work->node.a_flags) & IRQ_WORK_BUSY; | |
47 | } | |
6a02ad66 | 48 | |
cd578abb | 49 | bool irq_work_queue(struct irq_work *work); |
47885016 | 50 | bool irq_work_queue_on(struct irq_work *work, int cpu); |
47885016 | 51 | |
76a33061 | 52 | void irq_work_tick(void); |
38aaf809 | 53 | void irq_work_sync(struct irq_work *work); |
e360adbe | 54 | |
00b42959 | 55 | #ifdef CONFIG_IRQ_WORK |
c5c38ef3 PZ |
56 | #include <asm/irq_work.h> |
57 | ||
71ad00d6 | 58 | void irq_work_run(void); |
00b42959 | 59 | bool irq_work_needs_cpu(void); |
25de110d | 60 | void irq_work_single(void *arg); |
00b42959 | 61 | #else |
fe8d5261 | 62 | static inline bool irq_work_needs_cpu(void) { return false; } |
71ad00d6 | 63 | static inline void irq_work_run(void) { } |
25de110d | 64 | static inline void irq_work_single(void *arg) { } |
00b42959 FW |
65 | #endif |
66 | ||
e360adbe | 67 | #endif /* _LINUX_IRQ_WORK_H */ |