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virtio-serial-pci.c (3892B)

      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 "hw/virtio/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)