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 typedef struct VirtIOBlkPCI VirtIOBlkPCI;
  29
  30 /* virtio-pci-bus */
  31
  32 typedef struct VirtioBusState VirtioPCIBusState;
  33 typedef struct VirtioBusClass VirtioPCIBusClass;
  34
  35 #define TYPE_VIRTIO_PCI_BUS "virtio-pci-bus"
  36 #define VIRTIO_PCI_BUS(obj) \
  37         OBJECT_CHECK(VirtioPCIBusState, (obj), TYPE_VIRTIO_PCI_BUS)
  38 #define VIRTIO_PCI_BUS_GET_CLASS(obj) \
  39         OBJECT_GET_CLASS(VirtioPCIBusClass, obj, TYPE_VIRTIO_PCI_BUS)
  40 #define VIRTIO_PCI_BUS_CLASS(klass) \
  41         OBJECT_CLASS_CHECK(VirtioPCIBusClass, klass, TYPE_VIRTIO_PCI_BUS)
  42
  43 /* Performance improves when virtqueue kick processing is decoupled from the
  44  * vcpu thread using ioeventfd for some devices. */
  45 #define VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT 1
  46 #define VIRTIO_PCI_FLAG_USE_IOEVENTFD   (1 << VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT)
  47
  48 typedef struct {
  49     MSIMessage msg;
  50     int virq;
  51     unsigned int users;
  52 } VirtIOIRQFD;
  53
  54 /*
  55  * virtio-pci: This is the PCIDevice which has a virtio-pci-bus.
  56  */
  57 #define TYPE_VIRTIO_PCI "virtio-pci"
  58 #define VIRTIO_PCI_GET_CLASS(obj) \
  59         OBJECT_GET_CLASS(VirtioPCIClass, obj, TYPE_VIRTIO_PCI)
  60 #define VIRTIO_PCI_CLASS(klass) \
  61         OBJECT_CLASS_CHECK(VirtioPCIClass, klass, TYPE_VIRTIO_PCI)
  62 #define VIRTIO_PCI(obj) \
  63         OBJECT_CHECK(VirtIOPCIProxy, (obj), TYPE_VIRTIO_PCI)
  64
  65 typedef struct VirtioPCIClass {
  66     PCIDeviceClass parent_class;
  67     int (*init)(VirtIOPCIProxy *vpci_dev);
  68 } VirtioPCIClass;
  69
  70 struct VirtIOPCIProxy {
  71     PCIDevice pci_dev;
  72     VirtIODevice *vdev;
  73     MemoryRegion bar;
  74     uint32_t flags;
  75     uint32_t class_code;
  76     uint32_t nvectors;
  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 /*
  94  * virtio-blk-pci: This extends VirtioPCIProxy.
  95  */
  96 #define TYPE_VIRTIO_BLK_PCI "virtio-blk-pci"
  97 #define VIRTIO_BLK_PCI(obj) \
  98         OBJECT_CHECK(VirtIOBlkPCI, (obj), TYPE_VIRTIO_BLK_PCI)
  99
 100 struct VirtIOBlkPCI {
 101     VirtIOPCIProxy parent_obj;
 102     VirtIOBlock vdev;
 103     VirtIOBlkConf blk;
 104 };
 105
 106 void virtio_init_pci(VirtIOPCIProxy *proxy, VirtIODevice *vdev);
 107 void virtio_pci_bus_new(VirtioBusState *bus, VirtIOPCIProxy *dev);
 108
 109 /* Virtio ABI version, if we increment this, we break the guest driver. */
 110 #define VIRTIO_PCI_ABI_VERSION          0
 111
 112 #endif