xref: /openbmc/qemu/hw/virtio/virtio-rng-pci.c (revision 84369d76)
1 /*
2  * Virtio rng PCI Bindings
3  *
4  * Copyright 2012 Red Hat, Inc.
5  * Copyright 2012 Amit Shah <amit.shah@redhat.com>
6  *
7  * This work is licensed under the terms of the GNU GPL, version 2 or
8  * (at your option) any later version.  See the COPYING file in the
9  * top-level directory.
10  */
11 
12 #include "qemu/osdep.h"
13 
14 #include "hw/virtio/virtio-pci.h"
15 #include "hw/virtio/virtio-rng.h"
16 #include "hw/qdev-properties.h"
17 #include "qapi/error.h"
18 #include "qemu/module.h"
19 #include "qom/object.h"
20 
21 typedef struct VirtIORngPCI VirtIORngPCI;
22 
23 /*
24  * virtio-rng-pci: This extends VirtioPCIProxy.
25  */
26 #define TYPE_VIRTIO_RNG_PCI "virtio-rng-pci-base"
27 DECLARE_INSTANCE_CHECKER(VirtIORngPCI, VIRTIO_RNG_PCI,
28                          TYPE_VIRTIO_RNG_PCI)
29 
30 struct VirtIORngPCI {
31     VirtIOPCIProxy parent_obj;
32     VirtIORNG vdev;
33 };
34 
35 static Property virtio_rng_properties[] = {
36     DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
37                     VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
38     DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
39                        DEV_NVECTORS_UNSPECIFIED),
40     DEFINE_PROP_END_OF_LIST(),
41 };
42 
43 static void virtio_rng_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
44 {
45     VirtIORngPCI *vrng = VIRTIO_RNG_PCI(vpci_dev);
46     DeviceState *vdev = DEVICE(&vrng->vdev);
47 
48     if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
49         vpci_dev->nvectors = 2;
50     }
51 
52     if (!qdev_realize(vdev, BUS(&vpci_dev->bus), errp)) {
53         return;
54     }
55 }
56 
57 static void virtio_rng_pci_class_init(ObjectClass *klass, void *data)
58 {
59     DeviceClass *dc = DEVICE_CLASS(klass);
60     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
61     PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
62 
63     k->realize = virtio_rng_pci_realize;
64     set_bit(DEVICE_CATEGORY_MISC, dc->categories);
65 
66     pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
67     pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_RNG;
68     pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
69     pcidev_k->class_id = PCI_CLASS_OTHERS;
70     device_class_set_props(dc, virtio_rng_properties);
71 }
72 
73 static void virtio_rng_initfn(Object *obj)
74 {
75     VirtIORngPCI *dev = VIRTIO_RNG_PCI(obj);
76 
77     virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
78                                 TYPE_VIRTIO_RNG);
79 }
80 
81 static const VirtioPCIDeviceTypeInfo virtio_rng_pci_info = {
82     .base_name             = TYPE_VIRTIO_RNG_PCI,
83     .generic_name          = "virtio-rng-pci",
84     .transitional_name     = "virtio-rng-pci-transitional",
85     .non_transitional_name = "virtio-rng-pci-non-transitional",
86     .instance_size = sizeof(VirtIORngPCI),
87     .instance_init = virtio_rng_initfn,
88     .class_init    = virtio_rng_pci_class_init,
89 };
90 
91 static void virtio_rng_pci_register(void)
92 {
93     virtio_pci_types_register(&virtio_rng_pci_info);
94 }
95 
96 type_init(virtio_rng_pci_register)
97