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/*-
* Copyright (c) 2020 The FreeBSD Foundation
*
* This software was developed by Emmanuel Vadot under sponsorship
* from the FreeBSD Foundation.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef _LINUXKPI_LINUX_IRQ_WORK_H_
#define _LINUXKPI_LINUX_IRQ_WORK_H_
#include <sys/param.h>
#include <sys/taskqueue.h>
#include <linux/llist.h>
#include <linux/workqueue.h>
#define LKPI_IRQ_WORK_STD_TQ system_wq->taskqueue
#define LKPI_IRQ_WORK_FAST_TQ linux_irq_work_tq
#ifdef LKPI_IRQ_WORK_USE_FAST_TQ
#define LKPI_IRQ_WORK_TQ LKPI_IRQ_WORK_FAST_TQ
#else
#define LKPI_IRQ_WORK_TQ LKPI_IRQ_WORK_STD_TQ
#endif
struct irq_work;
typedef void (*irq_work_func_t)(struct irq_work *);
struct irq_work {
struct task irq_task;
union {
struct llist_node llnode;
struct {
struct llist_node llist;
} node;
};
irq_work_func_t func;
};
extern struct taskqueue *linux_irq_work_tq;
#define DEFINE_IRQ_WORK(name, _func) struct irq_work name = { \
.irq_task = TASK_INITIALIZER(0, linux_irq_work_fn, &(name)), \
.func = (_func), \
}
void linux_irq_work_fn(void *, int);
static inline void
init_irq_work(struct irq_work *irqw, irq_work_func_t func)
{
TASK_INIT(&irqw->irq_task, 0, linux_irq_work_fn, irqw);
irqw->func = func;
}
static inline bool
irq_work_queue(struct irq_work *irqw)
{
return (taskqueue_enqueue_flags(LKPI_IRQ_WORK_TQ, &irqw->irq_task,
TASKQUEUE_FAIL_IF_PENDING) == 0);
}
static inline void
irq_work_sync(struct irq_work *irqw)
{
taskqueue_drain(LKPI_IRQ_WORK_TQ, &irqw->irq_task);
}
#endif /* _LINUXKPI_LINUX_IRQ_WORK_H_ */
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