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 "hw/virtio-blk.h"
  20 #include "hw/virtio-net.h"
  21 #include "hw/virtio-rng.h"
  22 #include "hw/virtio-serial.h"
  23 #include "hw/virtio-scsi.h"
  24 #include "hw/virtio-bus.h"
  25 #include "hw/9pfs/virtio-9p-device.h"
  26
  27 typedef struct VirtIOPCIProxy VirtIOPCIProxy;
  28
  29 /* virtio-pci-bus */
  30
  31 typedef struct VirtioBusState VirtioPCIBusState;
  32 typedef struct VirtioBusClass VirtioPCIBusClass;
  33
  34 #define TYPE_VIRTIO_PCI_BUS "virtio-pci-bus"
  35 #define VIRTIO_PCI_BUS(obj) \
  36         OBJECT_CHECK(VirtioPCIBusState, (obj), TYPE_VIRTIO_PCI_BUS)
  37 #define VIRTIO_PCI_BUS_GET_CLASS(obj) \
  38         OBJECT_GET_CLASS(VirtioPCIBusClass, obj, TYPE_VIRTIO_PCI_BUS)
  39 #define VIRTIO_PCI_BUS_CLASS(klass) \
  40         OBJECT_CLASS_CHECK(VirtioPCIBusClass, klass, TYPE_VIRTIO_PCI_BUS)
  41
  42 /* Performance improves when virtqueue kick processing is decoupled from the
  43  * vcpu thread using ioeventfd for some devices. */
  44 #define VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT 1
  45 #define VIRTIO_PCI_FLAG_USE_IOEVENTFD   (1 << VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT)
  46
  47 typedef struct {
  48     MSIMessage msg;
  49     int virq;
  50     unsigned int users;
  51 } VirtIOIRQFD;
  52
  53 /*
  54  * virtio-pci: This is the PCIDevice which has a virtio-pci-bus.
  55  */
  56 #define TYPE_VIRTIO_PCI "virtio-pci"
  57 #define VIRTIO_PCI_GET_CLASS(obj) \
  58         OBJECT_GET_CLASS(VirtioPCIClass, obj, TYPE_VIRTIO_PCI)
  59 #define VIRTIO_PCI_CLASS(klass) \
  60         OBJECT_CLASS_CHECK(VirtioPCIClass, klass, TYPE_VIRTIO_PCI)
  61 #define VIRTIO_PCI(obj) \
  62         OBJECT_CHECK(VirtIOPCIProxy, (obj), TYPE_VIRTIO_PCI)
  63
  64 typedef struct VirtioPCIClass {
  65     PCIDeviceClass parent_class;
  66     int (*init)(VirtIOPCIProxy *vpci_dev);
  67 } VirtioPCIClass;
  68
  69 struct VirtIOPCIProxy {
  70     PCIDevice pci_dev;
  71     VirtIODevice *vdev;
  72     MemoryRegion bar;
  73     uint32_t flags;
  74     uint32_t class_code;
  75     uint32_t nvectors;
  76     VirtIOBlkConf blk;
  77     NICConf nic;
  78     uint32_t host_features;
  79 #ifdef CONFIG_VIRTFS
  80     V9fsConf fsconf;
  81 #endif
  82     virtio_serial_conf serial;
  83     virtio_net_conf net;
  84     VirtIOSCSIConf scsi;
  85     VirtIORNGConf rng;
  86     bool ioeventfd_disabled;
  87     bool ioeventfd_started;
  88     VirtIOIRQFD *vector_irqfd;
  89     int nvqs_with_notifiers;
  90     VirtioBusState bus;
  91 };
  92
  93 void virtio_init_pci(VirtIOPCIProxy *proxy, VirtIODevice *vdev);
  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