1 /*
2 * Vhost-user GPIO virtio device
3 *
4 * Copyright (c) 2022 Viresh Kumar <viresh.kumar@linaro.org>
5 *
6 * SPDX-License-Identifier: GPL-2.0-or-later
7 */
8
9 #include "qemu/osdep.h"
10 #include "qapi/error.h"
11 #include "hw/qdev-properties.h"
12 #include "hw/virtio/virtio-bus.h"
13 #include "hw/virtio/vhost-user-gpio.h"
14 #include "standard-headers/linux/virtio_ids.h"
15 #include "standard-headers/linux/virtio_gpio.h"
16
17 static const Property vgpio_properties[] = {
18 DEFINE_PROP_CHR("chardev", VHostUserBase, chardev),
19 };
20
vgpio_realize(DeviceState * dev,Error ** errp)21 static void vgpio_realize(DeviceState *dev, Error **errp)
22 {
23 VHostUserBase *vub = VHOST_USER_BASE(dev);
24 VHostUserBaseClass *vubc = VHOST_USER_BASE_GET_CLASS(dev);
25
26 /* Fixed for GPIO */
27 vub->virtio_id = VIRTIO_ID_GPIO;
28 vub->num_vqs = 2;
29 vub->config_size = sizeof(struct virtio_gpio_config);
30
31 vubc->parent_realize(dev, errp);
32 }
33
34 static const VMStateDescription vu_gpio_vmstate = {
35 .name = "vhost-user-gpio",
36 .unmigratable = 1,
37 };
38
vu_gpio_class_init(ObjectClass * klass,const void * data)39 static void vu_gpio_class_init(ObjectClass *klass, const void *data)
40 {
41 DeviceClass *dc = DEVICE_CLASS(klass);
42 VHostUserBaseClass *vubc = VHOST_USER_BASE_CLASS(klass);
43
44 dc->vmsd = &vu_gpio_vmstate;
45 device_class_set_props(dc, vgpio_properties);
46 device_class_set_parent_realize(dc, vgpio_realize,
47 &vubc->parent_realize);
48 set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
49 }
50
51 static const TypeInfo vu_gpio_info = {
52 .name = TYPE_VHOST_USER_GPIO,
53 .parent = TYPE_VHOST_USER_BASE,
54 .instance_size = sizeof(VHostUserGPIO),
55 .class_init = vu_gpio_class_init,
56 };
57
vu_gpio_register_types(void)58 static void vu_gpio_register_types(void)
59 {
60 type_register_static(&vu_gpio_info);
61 }
62
63 type_init(vu_gpio_register_types)
64