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