qemu

FORK: QEMU emulator
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virtio-rng-pci.c (2810B)

      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)