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
  26 typedef struct VirtIOSerialPCI VirtIOSerialPCI;
  27
  28 /*
  29  * virtio-serial-pci: This extends VirtioPCIProxy.
  30  */
  31 #define TYPE_VIRTIO_SERIAL_PCI "virtio-serial-pci-base"
  32 DECLARE_INSTANCE_CHECKER(VirtIOSerialPCI, VIRTIO_SERIAL_PCI,
  33                          TYPE_VIRTIO_SERIAL_PCI)
  34
  35 struct VirtIOSerialPCI {
  36     VirtIOPCIProxy parent_obj;
  37     VirtIOSerial vdev;
  38 };
  39
  40 static 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
  72 static 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
  80 static 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
  94 static 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
 102 static 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
 112 static void virtio_serial_pci_register(void)
 113 {
 114     virtio_pci_types_register(&virtio_serial_pci_info);
 115 }
 116
 117 type_init(virtio_serial_pci_register)