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