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 "virtio-blk.h"
  19 #include "virtio-net.h"
  20 #include "virtio-serial.h"
  21 #include "virtio-scsi.h"
  22
  23 /* Performance improves when virtqueue kick processing is decoupled from the
  24  * vcpu thread using ioeventfd for some devices. */
  25 #define VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT 1
  26 #define VIRTIO_PCI_FLAG_USE_IOEVENTFD   (1 << VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT)
  27
  28 typedef struct {
  29     int virq;
  30     unsigned int users;
  31 } VirtIOIRQFD;
  32
  33 typedef struct {
  34     PCIDevice pci_dev;
  35     VirtIODevice *vdev;
  36     MemoryRegion bar;
  37     MemoryRegion msix_bar;
  38     uint32_t flags;
  39     uint32_t class_code;
  40     uint32_t nvectors;
  41     VirtIOBlkConf blk;
  42     NICConf nic;
  43     uint32_t host_features;
  44 #ifdef CONFIG_LINUX
  45     V9fsConf fsconf;
  46 #endif
  47     virtio_serial_conf serial;
  48     virtio_net_conf net;
  49     VirtIOSCSIConf scsi;
  50     bool ioeventfd_disabled;
  51     bool ioeventfd_started;
  52     VirtIOIRQFD *vector_irqfd;
  53 } VirtIOPCIProxy;
  54
  55 void virtio_init_pci(VirtIOPCIProxy *proxy, VirtIODevice *vdev);
  56 void virtio_pci_reset(DeviceState *d);
  57
  58 /* Virtio ABI version, if we increment this, we break the guest driver. */
  59 #define VIRTIO_PCI_ABI_VERSION          0
  60
  61 #endif