linux/drivers/vfio/virqfd.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * VFIO generic eventfd code for IRQFD support.
 * Derived from drivers/vfio/pci/vfio_pci_intrs.c
 *
 * Copyright (C) 2012 Red Hat, Inc.  All rights reserved.
 *     Author: Alex Williamson <[email protected]>
 */

#include <linux/vfio.h>
#include <linux/eventfd.h>
#include <linux/file.h>
#include <linux/module.h>
#include <linux/slab.h>
#include "vfio.h"

static struct workqueue_struct *vfio_irqfd_cleanup_wq;
static DEFINE_SPINLOCK(virqfd_lock);

int __init vfio_virqfd_init(void)
{ … }

void vfio_virqfd_exit(void)
{ … }

static void virqfd_deactivate(struct virqfd *virqfd)
{ … }

static int virqfd_wakeup(wait_queue_entry_t *wait, unsigned mode, int sync, void *key)
{ … }

static void virqfd_ptable_queue_proc(struct file *file,
				     wait_queue_head_t *wqh, poll_table *pt)
{ … }

static void virqfd_shutdown(struct work_struct *work)
{ … }

static void virqfd_inject(struct work_struct *work)
{ … }

static void virqfd_flush_inject(struct work_struct *work)
{ … }

int vfio_virqfd_enable(void *opaque,
		       int (*handler)(void *, void *),
		       void (*thread)(void *, void *),
		       void *data, struct virqfd **pvirqfd, int fd)
{ … }
EXPORT_SYMBOL_GPL(…);

void vfio_virqfd_disable(struct virqfd **pvirqfd)
{ … }
EXPORT_SYMBOL_GPL(…);

void vfio_virqfd_flush_thread(struct virqfd **pvirqfd)
{ … }
EXPORT_SYMBOL_GPL(…);