linux/drivers/virtio/virtio_pci_legacy.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Virtio PCI driver - legacy device support
 *
 * This module allows virtio devices to be used over a virtual PCI device.
 * This can be used with QEMU based VMMs like KVM or Xen.
 *
 * Copyright IBM Corp. 2007
 * Copyright Red Hat, Inc. 2014
 *
 * Authors:
 *  Anthony Liguori  <[email protected]>
 *  Rusty Russell <[email protected]>
 *  Michael S. Tsirkin <[email protected]>
 */

#include "linux/virtio_pci_legacy.h"
#include "virtio_pci_common.h"

/* virtio config->get_features() implementation */
static u64 vp_get_features(struct virtio_device *vdev)
{ … }

/* virtio config->finalize_features() implementation */
static int vp_finalize_features(struct virtio_device *vdev)
{ … }

/* virtio config->get() implementation */
static void vp_get(struct virtio_device *vdev, unsigned int offset,
		   void *buf, unsigned int len)
{ … }

/* the config->set() implementation.  it's symmetric to the config->get()
 * implementation */
static void vp_set(struct virtio_device *vdev, unsigned int offset,
		   const void *buf, unsigned int len)
{ … }

/* config->{get,set}_status() implementations */
static u8 vp_get_status(struct virtio_device *vdev)
{ … }

static void vp_set_status(struct virtio_device *vdev, u8 status)
{ … }

static void vp_reset(struct virtio_device *vdev)
{ … }

static u16 vp_config_vector(struct virtio_pci_device *vp_dev, u16 vector)
{ … }

static struct virtqueue *setup_vq(struct virtio_pci_device *vp_dev,
				  struct virtio_pci_vq_info *info,
				  unsigned int index,
				  void (*callback)(struct virtqueue *vq),
				  const char *name,
				  bool ctx,
				  u16 msix_vec)
{ … }

static void del_vq(struct virtio_pci_vq_info *info)
{ … }

static const struct virtio_config_ops virtio_pci_config_ops = …;

/* the PCI probing function */
int virtio_pci_legacy_probe(struct virtio_pci_device *vp_dev)
{ … }

void virtio_pci_legacy_remove(struct virtio_pci_device *vp_dev)
{ … }