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7#include "qemu/osdep.h"
8#include "qemu/error-report.h"
9#include "qapi/error.h"
10#include "qemu-common.h"
11
12#include "hw/qdev.h"
13#include "hw/virtio/virtio-input.h"
14
15static int vhost_input_config_change(struct vhost_dev *dev)
16{
17 error_report("vhost-user-input: unhandled backend config change");
18 return -1;
19}
20
21static const VhostDevConfigOps config_ops = {
22 .vhost_dev_config_notifier = vhost_input_config_change,
23};
24
25static void vhost_input_realize(DeviceState *dev, Error **errp)
26{
27 VHostUserInput *vhi = VHOST_USER_INPUT(dev);
28 VirtIOInput *vinput = VIRTIO_INPUT(dev);
29 VirtIODevice *vdev = VIRTIO_DEVICE(dev);
30
31 vhost_dev_set_config_notifier(&vhi->vhost->dev, &config_ops);
32 vinput->cfg_size = sizeof_field(virtio_input_config, u);
33 if (vhost_user_backend_dev_init(vhi->vhost, vdev, 2, errp) == -1) {
34 return;
35 }
36}
37
38static void vhost_input_change_active(VirtIOInput *vinput)
39{
40 VHostUserInput *vhi = VHOST_USER_INPUT(vinput);
41
42 if (vinput->active) {
43 vhost_user_backend_start(vhi->vhost);
44 } else {
45 vhost_user_backend_stop(vhi->vhost);
46 }
47}
48
49static void vhost_input_get_config(VirtIODevice *vdev, uint8_t *config_data)
50{
51 VirtIOInput *vinput = VIRTIO_INPUT(vdev);
52 VHostUserInput *vhi = VHOST_USER_INPUT(vdev);
53 int ret;
54
55 memset(config_data, 0, vinput->cfg_size);
56
57 ret = vhost_dev_get_config(&vhi->vhost->dev, config_data, vinput->cfg_size);
58 if (ret) {
59 error_report("vhost-user-input: get device config space failed");
60 return;
61 }
62}
63
64static void vhost_input_set_config(VirtIODevice *vdev,
65 const uint8_t *config_data)
66{
67 VHostUserInput *vhi = VHOST_USER_INPUT(vdev);
68 int ret;
69
70 ret = vhost_dev_set_config(&vhi->vhost->dev, config_data,
71 0, sizeof(virtio_input_config),
72 VHOST_SET_CONFIG_TYPE_MASTER);
73 if (ret) {
74 error_report("vhost-user-input: set device config space failed");
75 return;
76 }
77
78 virtio_notify_config(vdev);
79}
80
81static const VMStateDescription vmstate_vhost_input = {
82 .name = "vhost-user-input",
83 .unmigratable = 1,
84};
85
86static void vhost_input_class_init(ObjectClass *klass, void *data)
87{
88 VirtIOInputClass *vic = VIRTIO_INPUT_CLASS(klass);
89 VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
90 DeviceClass *dc = DEVICE_CLASS(klass);
91
92 dc->vmsd = &vmstate_vhost_input;
93 vdc->get_config = vhost_input_get_config;
94 vdc->set_config = vhost_input_set_config;
95 vic->realize = vhost_input_realize;
96 vic->change_active = vhost_input_change_active;
97}
98
99static void vhost_input_init(Object *obj)
100{
101 VHostUserInput *vhi = VHOST_USER_INPUT(obj);
102
103 vhi->vhost = VHOST_USER_BACKEND(object_new(TYPE_VHOST_USER_BACKEND));
104 object_property_add_alias(obj, "chardev",
105 OBJECT(vhi->vhost), "chardev", &error_abort);
106}
107
108static void vhost_input_finalize(Object *obj)
109{
110 VHostUserInput *vhi = VHOST_USER_INPUT(obj);
111
112 object_unref(OBJECT(vhi->vhost));
113}
114
115static const TypeInfo vhost_input_info = {
116 .name = TYPE_VHOST_USER_INPUT,
117 .parent = TYPE_VIRTIO_INPUT,
118 .instance_size = sizeof(VHostUserInput),
119 .instance_init = vhost_input_init,
120 .instance_finalize = vhost_input_finalize,
121 .class_init = vhost_input_class_init,
122};
123
124static void vhost_input_register_types(void)
125{
126 type_register_static(&vhost_input_info);
127}
128
129type_init(vhost_input_register_types)
130
