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 #include "virtio-bus.h"
  25
  26 typedef struct VirtIOPCIProxy VirtIOPCIProxy;
  27
  28 /* virtio-pci-bus */
  29
  30 typedef struct VirtioBusState VirtioPCIBusState;
  31 typedef struct VirtioBusClass VirtioPCIBusClass;
  32
  33 #define TYPE_VIRTIO_PCI_BUS "virtio-pci-bus"
  34 #define VIRTIO_PCI_BUS(obj) \
  35         OBJECT_CHECK(VirtioPCIBusState, (obj), TYPE_VIRTIO_PCI_BUS)
  36 #define VIRTIO_PCI_BUS_GET_CLASS(obj) \
  37         OBJECT_GET_CLASS(VirtioPCIBusClass, obj, TYPE_VIRTIO_PCI_BUS)
  38 #define VIRTIO_PCI_BUS_CLASS(klass) \
  39         OBJECT_CLASS_CHECK(VirtioPCIBusClass, klass, TYPE_VIRTIO_PCI_BUS)
  40
  41 /* Performance improves when virtqueue kick processing is decoupled from the
  42  * vcpu thread using ioeventfd for some devices. */
  43 #define VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT 1
  44 #define VIRTIO_PCI_FLAG_USE_IOEVENTFD   (1 << VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT)
  45
  46 typedef struct {
  47     MSIMessage msg;
  48     int virq;
  49     unsigned int users;
  50 } VirtIOIRQFD;
  51
  52 /*
  53  * virtio-pci: This is the PCIDevice which has a virtio-pci-bus.
  54  */
  55 #define TYPE_VIRTIO_PCI "virtio-pci"
  56 #define VIRTIO_PCI_GET_CLASS(obj) \
  57         OBJECT_GET_CLASS(VirtioPCIClass, obj, TYPE_VIRTIO_PCI)
  58 #define VIRTIO_PCI_CLASS(klass) \
  59         OBJECT_CLASS_CHECK(VirtioPCIClass, klass, TYPE_VIRTIO_PCI)
  60 #define VIRTIO_PCI(obj) \
  61         OBJECT_CHECK(VirtIOPCIProxy, (obj), TYPE_VIRTIO_PCI)
  62
  63 typedef struct VirtioPCIClass {
  64     PCIDeviceClass parent_class;
  65     int (*init)(VirtIOPCIProxy *vpci_dev);
  66 } VirtioPCIClass;
  67
  68 struct VirtIOPCIProxy {
  69     PCIDevice pci_dev;
  70     VirtIODevice *vdev;
  71     MemoryRegion bar;
  72     uint32_t flags;
  73     uint32_t class_code;
  74     uint32_t nvectors;
  75     VirtIOBlkConf blk;
  76     NICConf nic;
  77     uint32_t host_features;
  78 #ifdef CONFIG_LINUX
  79     V9fsConf fsconf;
  80 #endif
  81     virtio_serial_conf serial;
  82     virtio_net_conf net;
  83     VirtIOSCSIConf scsi;
  84     VirtIORNGConf rng;
  85     bool ioeventfd_disabled;
  86     bool ioeventfd_started;
  87     VirtIOIRQFD *vector_irqfd;
  88     int nvqs_with_notifiers;
  89     VirtioBusState bus;
  90 };
  91
  92 void virtio_init_pci(VirtIOPCIProxy *proxy, VirtIODevice *vdev);
  93 void virtio_pci_reset(DeviceState *d);
  94 void virtio_pci_bus_new(VirtioBusState *bus, VirtIOPCIProxy *dev);
  95
  96 /* Virtio ABI version, if we increment this, we break the guest driver. */
  97 #define VIRTIO_PCI_ABI_VERSION          0
  98
  99 #endif