64 lines
1.6 KiB
C
64 lines
1.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _LINUX_IRQ_WORK_H
|
|
#define _LINUX_IRQ_WORK_H
|
|
|
|
#include <linux/llist.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
|
|
*/
|
|
|
|
#define IRQ_WORK_PENDING BIT(0)
|
|
#define IRQ_WORK_BUSY BIT(1)
|
|
|
|
/* Doesn't want IPI, wait for tick: */
|
|
#define IRQ_WORK_LAZY BIT(2)
|
|
/* Run hard IRQ context, even on RT */
|
|
#define IRQ_WORK_HARD_IRQ BIT(3)
|
|
|
|
#define IRQ_WORK_CLAIMED (IRQ_WORK_PENDING | IRQ_WORK_BUSY)
|
|
|
|
struct irq_work {
|
|
unsigned long flags;
|
|
struct llist_node llnode;
|
|
void (*func)(struct irq_work *);
|
|
};
|
|
|
|
static inline
|
|
void init_irq_work(struct irq_work *work, void (*func)(struct irq_work *))
|
|
{
|
|
work->flags = 0;
|
|
work->func = func;
|
|
}
|
|
|
|
#define DEFINE_IRQ_WORK(name, _f) struct irq_work name = { .func = (_f), }
|
|
|
|
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);
|
|
#else
|
|
static inline bool irq_work_needs_cpu(void) { return false; }
|
|
static inline void irq_work_run(void) { }
|
|
#endif
|
|
|
|
#if defined(CONFIG_IRQ_WORK) && defined(CONFIG_PREEMPT_RT)
|
|
void irq_work_tick_soft(void);
|
|
#else
|
|
static inline void irq_work_tick_soft(void) { }
|
|
#endif
|
|
|
|
#endif /* _LINUX_IRQ_WORK_H */
|