1 | /* |
2 | * This work is licensed under the terms of the GNU GPL, version 2 or |
3 | * (at your option) any later version. See the COPYING file in the |
4 | * top-level directory. |
5 | */ |
6 | |
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/virtio/virtio-input.h" |
13 | |
14 | static int vhost_input_config_change(struct vhost_dev *dev) |
15 | { |
16 | error_report("vhost-user-input: unhandled backend config change" ); |
17 | return -1; |
18 | } |
19 | |
20 | static const VhostDevConfigOps config_ops = { |
21 | .vhost_dev_config_notifier = vhost_input_config_change, |
22 | }; |
23 | |
24 | static void vhost_input_realize(DeviceState *dev, Error **errp) |
25 | { |
26 | VHostUserInput *vhi = VHOST_USER_INPUT(dev); |
27 | VirtIOInput *vinput = VIRTIO_INPUT(dev); |
28 | VirtIODevice *vdev = VIRTIO_DEVICE(dev); |
29 | |
30 | vhost_dev_set_config_notifier(&vhi->vhost->dev, &config_ops); |
31 | vinput->cfg_size = sizeof_field(virtio_input_config, u); |
32 | if (vhost_user_backend_dev_init(vhi->vhost, vdev, 2, errp) == -1) { |
33 | return; |
34 | } |
35 | } |
36 | |
37 | static void vhost_input_change_active(VirtIOInput *vinput) |
38 | { |
39 | VHostUserInput *vhi = VHOST_USER_INPUT(vinput); |
40 | |
41 | if (vinput->active) { |
42 | vhost_user_backend_start(vhi->vhost); |
43 | } else { |
44 | vhost_user_backend_stop(vhi->vhost); |
45 | } |
46 | } |
47 | |
48 | static void vhost_input_get_config(VirtIODevice *vdev, uint8_t *config_data) |
49 | { |
50 | VirtIOInput *vinput = VIRTIO_INPUT(vdev); |
51 | VHostUserInput *vhi = VHOST_USER_INPUT(vdev); |
52 | int ret; |
53 | |
54 | memset(config_data, 0, vinput->cfg_size); |
55 | |
56 | ret = vhost_dev_get_config(&vhi->vhost->dev, config_data, vinput->cfg_size); |
57 | if (ret) { |
58 | error_report("vhost-user-input: get device config space failed" ); |
59 | return; |
60 | } |
61 | } |
62 | |
63 | static void vhost_input_set_config(VirtIODevice *vdev, |
64 | const uint8_t *config_data) |
65 | { |
66 | VHostUserInput *vhi = VHOST_USER_INPUT(vdev); |
67 | int ret; |
68 | |
69 | ret = vhost_dev_set_config(&vhi->vhost->dev, config_data, |
70 | 0, sizeof(virtio_input_config), |
71 | VHOST_SET_CONFIG_TYPE_MASTER); |
72 | if (ret) { |
73 | error_report("vhost-user-input: set device config space failed" ); |
74 | return; |
75 | } |
76 | |
77 | virtio_notify_config(vdev); |
78 | } |
79 | |
80 | static const VMStateDescription vmstate_vhost_input = { |
81 | .name = "vhost-user-input" , |
82 | .unmigratable = 1, |
83 | }; |
84 | |
85 | static void vhost_input_class_init(ObjectClass *klass, void *data) |
86 | { |
87 | VirtIOInputClass *vic = VIRTIO_INPUT_CLASS(klass); |
88 | VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass); |
89 | DeviceClass *dc = DEVICE_CLASS(klass); |
90 | |
91 | dc->vmsd = &vmstate_vhost_input; |
92 | vdc->get_config = vhost_input_get_config; |
93 | vdc->set_config = vhost_input_set_config; |
94 | vic->realize = vhost_input_realize; |
95 | vic->change_active = vhost_input_change_active; |
96 | } |
97 | |
98 | static void vhost_input_init(Object *obj) |
99 | { |
100 | VHostUserInput *vhi = VHOST_USER_INPUT(obj); |
101 | |
102 | vhi->vhost = VHOST_USER_BACKEND(object_new(TYPE_VHOST_USER_BACKEND)); |
103 | object_property_add_alias(obj, "chardev" , |
104 | OBJECT(vhi->vhost), "chardev" , &error_abort); |
105 | } |
106 | |
107 | static void vhost_input_finalize(Object *obj) |
108 | { |
109 | VHostUserInput *vhi = VHOST_USER_INPUT(obj); |
110 | |
111 | object_unref(OBJECT(vhi->vhost)); |
112 | } |
113 | |
114 | static const TypeInfo vhost_input_info = { |
115 | .name = TYPE_VHOST_USER_INPUT, |
116 | .parent = TYPE_VIRTIO_INPUT, |
117 | .instance_size = sizeof(VHostUserInput), |
118 | .instance_init = vhost_input_init, |
119 | .instance_finalize = vhost_input_finalize, |
120 | .class_init = vhost_input_class_init, |
121 | }; |
122 | |
123 | static void vhost_input_register_types(void) |
124 | { |
125 | type_register_static(&vhost_input_info); |
126 | } |
127 | |
128 | type_init(vhost_input_register_types) |
129 | |