LXR qemu/hw/virtio/virtio-serial-pci.c

   1/*
   2 * Virtio serial 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 * Contributions after 2012-01-13 are licensed under the terms of the
  15 * GNU GPL, version 2 or (at your option) any later version.
  16 */
  17
  18#include "qemu/osdep.h"
  19
  20#include "hw/qdev-properties.h"
  21#include "hw/virtio/virtio-serial.h"
  22#include "qemu/module.h"
  23#include "virtio-pci.h"
  24#include "qom/object.h"
  25
  26typedef struct VirtIOSerialPCI VirtIOSerialPCI;
  27
  28/*
  29 * virtio-serial-pci: This extends VirtioPCIProxy.
  30 */
  31#define TYPE_VIRTIO_SERIAL_PCI "virtio-serial-pci-base"
  32DECLARE_INSTANCE_CHECKER(VirtIOSerialPCI, VIRTIO_SERIAL_PCI,
  33                         TYPE_VIRTIO_SERIAL_PCI)
  34
  35struct VirtIOSerialPCI {
  36    VirtIOPCIProxy parent_obj;
  37    VirtIOSerial vdev;
  38};
  39
  40static void virtio_serial_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
  41{
  42    VirtIOSerialPCI *dev = VIRTIO_SERIAL_PCI(vpci_dev);
  43    DeviceState *vdev = DEVICE(&dev->vdev);
  44    DeviceState *proxy = DEVICE(vpci_dev);
  45    char *bus_name;
  46
  47    if (vpci_dev->class_code != PCI_CLASS_COMMUNICATION_OTHER &&
  48        vpci_dev->class_code != PCI_CLASS_DISPLAY_OTHER && /* qemu 0.10 */
  49        vpci_dev->class_code != PCI_CLASS_OTHERS) {        /* qemu-kvm  */
  50            vpci_dev->class_code = PCI_CLASS_COMMUNICATION_OTHER;
  51    }
  52
  53    /* backwards-compatibility with machines that were created with
  54       DEV_NVECTORS_UNSPECIFIED */
  55    if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
  56        vpci_dev->nvectors = dev->vdev.serial.max_virtserial_ports + 1;
  57    }
  58
  59    /*
  60     * For command line compatibility, this sets the virtio-serial-device bus
  61     * name as before.
  62     */
  63    if (proxy->id) {
  64        bus_name = g_strdup_printf("%s.0", proxy->id);
  65        virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev), bus_name);
  66        g_free(bus_name);
  67    }
  68
  69    qdev_realize(vdev, BUS(&vpci_dev->bus), errp);
  70}
  71
  72static Property virtio_serial_pci_properties[] = {
  73    DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
  74                    VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
  75    DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2),
  76    DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0),
  77    DEFINE_PROP_END_OF_LIST(),
  78};
  79
  80static void virtio_serial_pci_class_init(ObjectClass *klass, void *data)
  81{
  82    DeviceClass *dc = DEVICE_CLASS(klass);
  83    VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
  84    PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
  85    k->realize = virtio_serial_pci_realize;
  86    set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
  87    device_class_set_props(dc, virtio_serial_pci_properties);
  88    pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
  89    pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_CONSOLE;
  90    pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
  91    pcidev_k->class_id = PCI_CLASS_COMMUNICATION_OTHER;
  92}
  93
  94static void virtio_serial_pci_instance_init(Object *obj)
  95{
  96    VirtIOSerialPCI *dev = VIRTIO_SERIAL_PCI(obj);
  97
  98    virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
  99                                TYPE_VIRTIO_SERIAL);
 100}
 101
 102static const VirtioPCIDeviceTypeInfo virtio_serial_pci_info = {
 103    .base_name             = TYPE_VIRTIO_SERIAL_PCI,
 104    .generic_name          = "virtio-serial-pci",
 105    .transitional_name     = "virtio-serial-pci-transitional",
 106    .non_transitional_name = "virtio-serial-pci-non-transitional",
 107    .instance_size = sizeof(VirtIOSerialPCI),
 108    .instance_init = virtio_serial_pci_instance_init,
 109    .class_init    = virtio_serial_pci_class_init,
 110};
 111
 112static void virtio_serial_pci_register(void)
 113{
 114    virtio_pci_types_register(&virtio_serial_pci_info);
 115}
 116
 117type_init(virtio_serial_pci_register)
 118