| /* SPDX-License-Identifier: GPL-2.0 */ |
| #ifndef _LINUX_IRQ_WORK_H |
| #define _LINUX_IRQ_WORK_H |
| |
| #include <linux/smp_types.h> |
| |
| /* |
| * An entry can be in one of four states: |
| * |
| * free NULL, 0 -> {claimed} : free to be used |
| * claimed NULL, 3 -> {pending} : claimed to be enqueued |
| * pending next, 3 -> {busy} : queued, pending callback |
| * busy NULL, 2 -> {free, claimed} : callback in progress, can be claimed |
| */ |
| |
| struct irq_work { |
| struct __call_single_node node; |
| void (*func)(struct irq_work *); |
| }; |
| |
| #define __IRQ_WORK_INIT(_func, _flags) (struct irq_work){ \ |
| .node = { .u_flags = (_flags), }, \ |
| .func = (_func), \ |
| } |
| |
| #define IRQ_WORK_INIT(_func) __IRQ_WORK_INIT(_func, 0) |
| #define IRQ_WORK_INIT_LAZY(_func) __IRQ_WORK_INIT(_func, IRQ_WORK_LAZY) |
| #define IRQ_WORK_INIT_HARD(_func) __IRQ_WORK_INIT(_func, IRQ_WORK_HARD_IRQ) |
| |
| #define DEFINE_IRQ_WORK(name, _f) \ |
| struct irq_work name = IRQ_WORK_INIT(_f) |
| |
| static inline |
| void init_irq_work(struct irq_work *work, void (*func)(struct irq_work *)) |
| { |
| *work = IRQ_WORK_INIT(func); |
| } |
| |
| static inline bool irq_work_is_pending(struct irq_work *work) |
| { |
| return atomic_read(&work->node.a_flags) & IRQ_WORK_PENDING; |
| } |
| |
| static inline bool irq_work_is_busy(struct irq_work *work) |
| { |
| return atomic_read(&work->node.a_flags) & IRQ_WORK_BUSY; |
| } |
| |
| bool irq_work_queue(struct irq_work *work); |
| bool irq_work_queue_on(struct irq_work *work, int cpu); |
| |
| void irq_work_tick(void); |
| void irq_work_sync(struct irq_work *work); |
| |
| #ifdef CONFIG_IRQ_WORK |
| #include <asm/irq_work.h> |
| |
| void irq_work_run(void); |
| bool irq_work_needs_cpu(void); |
| void irq_work_single(void *arg); |
| #else |
| static inline bool irq_work_needs_cpu(void) { return false; } |
| static inline void irq_work_run(void) { } |
| static inline void irq_work_single(void *arg) { } |
| #endif |
| |
| #endif /* _LINUX_IRQ_WORK_H */ |