LCOV - code coverage report
Current view: top level - include/linux - irq_work.h (source / functions) Hit Total Coverage
Test: coverage.info Lines: 0 2 0.0 %
Date: 2023-04-06 08:38:28 Functions: 0 0 -

          Line data    Source code
       1             : /* SPDX-License-Identifier: GPL-2.0 */
       2             : #ifndef _LINUX_IRQ_WORK_H
       3             : #define _LINUX_IRQ_WORK_H
       4             : 
       5             : #include <linux/smp_types.h>
       6             : #include <linux/rcuwait.h>
       7             : 
       8             : /*
       9             :  * An entry can be in one of four states:
      10             :  *
      11             :  * free      NULL, 0 -> {claimed}       : free to be used
      12             :  * claimed   NULL, 3 -> {pending}       : claimed to be enqueued
      13             :  * pending   next, 3 -> {busy}          : queued, pending callback
      14             :  * busy      NULL, 2 -> {free, claimed} : callback in progress, can be claimed
      15             :  */
      16             : 
      17             : struct irq_work {
      18             :         struct __call_single_node node;
      19             :         void (*func)(struct irq_work *);
      20             :         struct rcuwait irqwait;
      21             : };
      22             : 
      23             : #define __IRQ_WORK_INIT(_func, _flags) (struct irq_work){       \
      24             :         .node = { .u_flags = (_flags), },                       \
      25             :         .func = (_func),                                        \
      26             :         .irqwait = __RCUWAIT_INITIALIZER(irqwait),              \
      27             : }
      28             : 
      29             : #define IRQ_WORK_INIT(_func) __IRQ_WORK_INIT(_func, 0)
      30             : #define IRQ_WORK_INIT_LAZY(_func) __IRQ_WORK_INIT(_func, IRQ_WORK_LAZY)
      31             : #define IRQ_WORK_INIT_HARD(_func) __IRQ_WORK_INIT(_func, IRQ_WORK_HARD_IRQ)
      32             : 
      33             : #define DEFINE_IRQ_WORK(name, _f)                               \
      34             :         struct irq_work name = IRQ_WORK_INIT(_f)
      35             : 
      36             : static inline
      37             : void init_irq_work(struct irq_work *work, void (*func)(struct irq_work *))
      38             : {
      39           0 :         *work = IRQ_WORK_INIT(func);
      40             : }
      41             : 
      42             : static inline bool irq_work_is_pending(struct irq_work *work)
      43             : {
      44             :         return atomic_read(&work->node.a_flags) & IRQ_WORK_PENDING;
      45             : }
      46             : 
      47             : static inline bool irq_work_is_busy(struct irq_work *work)
      48             : {
      49           0 :         return atomic_read(&work->node.a_flags) & IRQ_WORK_BUSY;
      50             : }
      51             : 
      52             : static inline bool irq_work_is_hard(struct irq_work *work)
      53             : {
      54             :         return atomic_read(&work->node.a_flags) & IRQ_WORK_HARD_IRQ;
      55             : }
      56             : 
      57             : bool irq_work_queue(struct irq_work *work);
      58             : bool irq_work_queue_on(struct irq_work *work, int cpu);
      59             : 
      60             : void irq_work_tick(void);
      61             : void irq_work_sync(struct irq_work *work);
      62             : 
      63             : #ifdef CONFIG_IRQ_WORK
      64             : #include <asm/irq_work.h>
      65             : 
      66             : void irq_work_run(void);
      67             : bool irq_work_needs_cpu(void);
      68             : void irq_work_single(void *arg);
      69             : #else
      70             : static inline bool irq_work_needs_cpu(void) { return false; }
      71             : static inline void irq_work_run(void) { }
      72             : static inline void irq_work_single(void *arg) { }
      73             : #endif
      74             : 
      75             : #endif /* _LINUX_IRQ_WORK_H */

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