hw/s390x/virtio-ccw-rng.c

   1 /*
   2  * virtio ccw random number generator implementation
   3  *
   4  * Copyright 2012, 2015 IBM Corp.
   5  * Author(s): Cornelia Huck <cornelia.huck@de.ibm.com>
   6  *
   7  * This work is licensed under the terms of the GNU GPL, version 2 or (at
   8  * your option) any later version. See the COPYING file in the top-level
   9  * directory.
  10  */
  11
  12 #include "qemu/osdep.h"
  13 #include "hw/qdev-properties.h"
  14 #include "hw/virtio/virtio.h"
  15 #include "qapi/error.h"
  16 #include "qemu/module.h"
  17 #include "virtio-ccw.h"
  18 #include "hw/virtio/virtio-rng.h"
  19
  20 #define TYPE_VIRTIO_RNG_CCW "virtio-rng-ccw"
  21 OBJECT_DECLARE_SIMPLE_TYPE(VirtIORNGCcw, VIRTIO_RNG_CCW)
  22
  23 struct VirtIORNGCcw {
  24     VirtioCcwDevice parent_obj;
  25     VirtIORNG vdev;
  26 };
  27
  28 static void virtio_ccw_rng_realize(VirtioCcwDevice *ccw_dev, Error **errp)
  29 {
  30     VirtIORNGCcw *dev = VIRTIO_RNG_CCW(ccw_dev);
  31     DeviceState *vdev = DEVICE(&dev->vdev);
  32
  33     if (!qdev_realize(vdev, BUS(&ccw_dev->bus), errp)) {
  34         return;
  35     }
  36 }
  37
  38 static void virtio_ccw_rng_instance_init(Object *obj)
  39 {
  40     VirtIORNGCcw *dev = VIRTIO_RNG_CCW(obj);
  41
  42     virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
  43                                 TYPE_VIRTIO_RNG);
  44 }
  45
  46 static Property virtio_ccw_rng_properties[] = {
  47     DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice, flags,
  48                     VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT, true),
  49     DEFINE_PROP_UINT32("max_revision", VirtioCcwDevice, max_rev,
  50                        VIRTIO_CCW_MAX_REV),
  51     DEFINE_PROP_END_OF_LIST(),
  52 };
  53
  54 static void virtio_ccw_rng_class_init(ObjectClass *klass, void *data)
  55 {
  56     DeviceClass *dc = DEVICE_CLASS(klass);
  57     VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_CLASS(klass);
  58
  59     k->realize = virtio_ccw_rng_realize;
  60     device_class_set_props(dc, virtio_ccw_rng_properties);
  61     set_bit(DEVICE_CATEGORY_MISC, dc->categories);
  62 }
  63
  64 static const TypeInfo virtio_ccw_rng = {
  65     .name          = TYPE_VIRTIO_RNG_CCW,
  66     .parent        = TYPE_VIRTIO_CCW_DEVICE,
  67     .instance_size = sizeof(VirtIORNGCcw),
  68     .instance_init = virtio_ccw_rng_instance_init,
  69     .class_init    = virtio_ccw_rng_class_init,
  70 };
  71
  72 static void virtio_ccw_rng_register(void)
  73 {
  74     type_register_static(&virtio_ccw_rng);
  75 }
  76
  77 type_init(virtio_ccw_rng_register)