hw/virtio-pci.h

   1 /*
   2  * Virtio PCI Bindings
   3  *
   4  * Copyright IBM, Corp. 2007
   5  * Copyright (c) 2009 CodeSourcery
   6  *
   7  * Authors:
   8  *  Anthony Liguori   <aliguori@us.ibm.com>
   9  *  Paul Brook        <paul@codesourcery.com>
  10  *
  11  * This work is licensed under the terms of the GNU GPL, version 2.  See
  12  * the COPYING file in the top-level directory.
  13  */
  14
  15 #ifndef QEMU_VIRTIO_PCI_H
  16 #define QEMU_VIRTIO_PCI_H
  17
  18 #include "hw/pci/msi.h"
  19 #include "virtio-blk.h"
  20 #include "virtio-net.h"
  21 #include "virtio-rng.h"
  22 #include "virtio-serial.h"
  23 #include "virtio-scsi.h"
  24
  25 /* Performance improves when virtqueue kick processing is decoupled from the
  26  * vcpu thread using ioeventfd for some devices. */
  27 #define VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT 1
  28 #define VIRTIO_PCI_FLAG_USE_IOEVENTFD   (1 << VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT)
  29
  30 typedef struct {
  31     MSIMessage msg;
  32     int virq;
  33     unsigned int users;
  34 } VirtIOIRQFD;
  35
  36 typedef struct {
  37     PCIDevice pci_dev;
  38     VirtIODevice *vdev;
  39     MemoryRegion bar;
  40     uint32_t flags;
  41     uint32_t class_code;
  42     uint32_t nvectors;
  43     VirtIOBlkConf blk;
  44     NICConf nic;
  45     uint32_t host_features;
  46 #ifdef CONFIG_LINUX
  47     V9fsConf fsconf;
  48 #endif
  49     virtio_serial_conf serial;
  50     virtio_net_conf net;
  51     VirtIOSCSIConf scsi;
  52     VirtIORNGConf rng;
  53     bool ioeventfd_disabled;
  54     bool ioeventfd_started;
  55     VirtIOIRQFD *vector_irqfd;
  56     int nvqs_with_notifiers;
  57 } VirtIOPCIProxy;
  58
  59 void virtio_init_pci(VirtIOPCIProxy *proxy, VirtIODevice *vdev);
  60 void virtio_pci_reset(DeviceState *d);
  61
  62 /* Virtio ABI version, if we increment this, we break the guest driver. */
  63 #define VIRTIO_PCI_ABI_VERSION          0
  64
  65 #endif