msi: add API to get notified about pending bit poll

[mirror_qemu.git] / hw / virtio-pci.h

/*
 * Virtio PCI Bindings
 *
 * Copyright IBM, Corp. 2007
 * Copyright (c) 2009 CodeSourcery
 *
 * Authors:
 *  Anthony Liguori   <aliguori@us.ibm.com>
 *  Paul Brook        <paul@codesourcery.com>
 *
 * This work is licensed under the terms of the GNU GPL, version 2.  See
 * the COPYING file in the top-level directory.
 */

#ifndef QEMU_VIRTIO_PCI_H
#define QEMU_VIRTIO_PCI_H

#include "virtio-blk.h"
#include "virtio-net.h"
#include "virtio-rng.h"
#include "virtio-serial.h"
#include "virtio-scsi.h"

/* Performance improves when virtqueue kick processing is decoupled from the
 * vcpu thread using ioeventfd for some devices. */
#define VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT 1
#define VIRTIO_PCI_FLAG_USE_IOEVENTFD   (1 << VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT)

typedef struct {
    int virq;
    unsigned int users;
} VirtIOIRQFD;

typedef struct {
    PCIDevice pci_dev;
    VirtIODevice *vdev;
    MemoryRegion bar;
    uint32_t flags;
    uint32_t class_code;
    uint32_t nvectors;
    VirtIOBlkConf blk;
    NICConf nic;
    uint32_t host_features;
#ifdef CONFIG_LINUX
    V9fsConf fsconf;
#endif
    virtio_serial_conf serial;
    virtio_net_conf net;
    VirtIOSCSIConf scsi;
    VirtIORNGConf rng;
    bool ioeventfd_disabled;
    bool ioeventfd_started;
    VirtIOIRQFD *vector_irqfd;
} VirtIOPCIProxy;

void virtio_init_pci(VirtIOPCIProxy *proxy, VirtIODevice *vdev);
void virtio_pci_reset(DeviceState *d);

/* Virtio ABI version, if we increment this, we break the guest driver. */
#define VIRTIO_PCI_ABI_VERSION          0

#endif