| 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/core/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 | |
| 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 | |
| 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 | |
| 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) |