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