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 typedef struct VirtIOSCSIPCI VirtIOSCSIPCI;
  30
  31 /* virtio-pci-bus */
  32
  33 typedef struct VirtioBusState VirtioPCIBusState;
  34 typedef struct VirtioBusClass VirtioPCIBusClass;
  35
  36 #define TYPE_VIRTIO_PCI_BUS "virtio-pci-bus"
  37 #define VIRTIO_PCI_BUS(obj) \
  38         OBJECT_CHECK(VirtioPCIBusState, (obj), TYPE_VIRTIO_PCI_BUS)
  39 #define VIRTIO_PCI_BUS_GET_CLASS(obj) \
  40         OBJECT_GET_CLASS(VirtioPCIBusClass, obj, TYPE_VIRTIO_PCI_BUS)
  41 #define VIRTIO_PCI_BUS_CLASS(klass) \
  42         OBJECT_CLASS_CHECK(VirtioPCIBusClass, klass, TYPE_VIRTIO_PCI_BUS)
  43
  44 /* Performance improves when virtqueue kick processing is decoupled from the
  45  * vcpu thread using ioeventfd for some devices. */
  46 #define VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT 1
  47 #define VIRTIO_PCI_FLAG_USE_IOEVENTFD   (1 << VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT)
  48
  49 typedef struct {
  50     MSIMessage msg;
  51     int virq;
  52     unsigned int users;
  53 } VirtIOIRQFD;
  54
  55 /*
  56  * virtio-pci: This is the PCIDevice which has a virtio-pci-bus.
  57  */
  58 #define TYPE_VIRTIO_PCI "virtio-pci"
  59 #define VIRTIO_PCI_GET_CLASS(obj) \
  60         OBJECT_GET_CLASS(VirtioPCIClass, obj, TYPE_VIRTIO_PCI)
  61 #define VIRTIO_PCI_CLASS(klass) \
  62         OBJECT_CLASS_CHECK(VirtioPCIClass, klass, TYPE_VIRTIO_PCI)
  63 #define VIRTIO_PCI(obj) \
  64         OBJECT_CHECK(VirtIOPCIProxy, (obj), TYPE_VIRTIO_PCI)
  65
  66 typedef struct VirtioPCIClass {
  67     PCIDeviceClass parent_class;
  68     int (*init)(VirtIOPCIProxy *vpci_dev);
  69 } VirtioPCIClass;
  70
  71 struct VirtIOPCIProxy {
  72     PCIDevice pci_dev;
  73     VirtIODevice *vdev;
  74     MemoryRegion bar;
  75     uint32_t flags;
  76     uint32_t class_code;
  77     uint32_t nvectors;
  78     NICConf nic;
  79     uint32_t host_features;
  80 #ifdef CONFIG_VIRTFS
  81     V9fsConf fsconf;
  82 #endif
  83     virtio_serial_conf serial;
  84     virtio_net_conf net;
  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 /*
  95  * virtio-scsi-pci: This extends VirtioPCIProxy.
  96  */
  97 #define TYPE_VIRTIO_SCSI_PCI "virtio-scsi-pci"
  98 #define VIRTIO_SCSI_PCI(obj) \
  99         OBJECT_CHECK(VirtIOSCSIPCI, (obj), TYPE_VIRTIO_SCSI_PCI)
 100
 101 struct VirtIOSCSIPCI {
 102     VirtIOPCIProxy parent_obj;
 103     VirtIOSCSI vdev;
 104 };
 105
 106 /*
 107  * virtio-blk-pci: This extends VirtioPCIProxy.
 108  */
 109 #define TYPE_VIRTIO_BLK_PCI "virtio-blk-pci"
 110 #define VIRTIO_BLK_PCI(obj) \
 111         OBJECT_CHECK(VirtIOBlkPCI, (obj), TYPE_VIRTIO_BLK_PCI)
 112
 113 struct VirtIOBlkPCI {
 114     VirtIOPCIProxy parent_obj;
 115     VirtIOBlock vdev;
 116     VirtIOBlkConf blk;
 117 };
 118
 119 void virtio_init_pci(VirtIOPCIProxy *proxy, VirtIODevice *vdev);
 120 void virtio_pci_bus_new(VirtioBusState *bus, VirtIOPCIProxy *dev);
 121
 122 /* Virtio ABI version, if we increment this, we break the guest driver. */
 123 #define VIRTIO_PCI_ABI_VERSION          0
 124
 125 #endif