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 Property vgpio_properties[] = { 18 DEFINE_PROP_CHR("chardev", VHostUserBase, chardev), 19 DEFINE_PROP_END_OF_LIST(), 20 }; 21 22 static void vgpio_realize(DeviceState *dev, Error **errp) 23 { 24 VHostUserBase *vub = VHOST_USER_BASE(dev); 25 VHostUserBaseClass *vubc = VHOST_USER_BASE_GET_CLASS(dev); 26 27 /* Fixed for GPIO */ 28 vub->virtio_id = VIRTIO_ID_GPIO; 29 vub->num_vqs = 2; 30 vub->config_size = sizeof(struct virtio_gpio_config); 31 32 vubc->parent_realize(dev, errp); 33 } 34 35 static const VMStateDescription vu_gpio_vmstate = { 36 .name = "vhost-user-gpio", 37 .unmigratable = 1, 38 }; 39 40 static void vu_gpio_class_init(ObjectClass *klass, void *data) 41 { 42 DeviceClass *dc = DEVICE_CLASS(klass); 43 VHostUserBaseClass *vubc = VHOST_USER_BASE_CLASS(klass); 44 45 dc->vmsd = &vu_gpio_vmstate; 46 device_class_set_props(dc, vgpio_properties); 47 device_class_set_parent_realize(dc, vgpio_realize, 48 &vubc->parent_realize); 49 set_bit(DEVICE_CATEGORY_INPUT, dc->categories); 50 } 51 52 static const TypeInfo vu_gpio_info = { 53 .name = TYPE_VHOST_USER_GPIO, 54 .parent = TYPE_VHOST_USER_BASE, 55 .instance_size = sizeof(VHostUserGPIO), 56 .class_init = vu_gpio_class_init, 57 }; 58 59 static void vu_gpio_register_types(void) 60 { 61 type_register_static(&vu_gpio_info); 62 } 63 64 type_init(vu_gpio_register_types) 65