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
vhost_input_config_change(struct vhost_dev * dev)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
vhost_input_realize(DeviceState * dev,Error ** errp)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
vhost_input_change_active(VirtIOInput * vinput)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
vhost_input_get_config(VirtIODevice * vdev,uint8_t * config_data)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
vhost_input_set_config(VirtIODevice * vdev,const uint8_t * config_data)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
vhost_input_class_init(ObjectClass * klass,void * data)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
vhost_input_init(Object * obj)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
vhost_input_finalize(Object * obj)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
vhost_input_register_types(void)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