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Diffstat (limited to 'vhost_user_input.h')
| -rw-r--r-- | vhost_user_input.h | 187 |
1 files changed, 187 insertions, 0 deletions
diff --git a/vhost_user_input.h b/vhost_user_input.h new file mode 100644 index 0000000..db5ed33 --- /dev/null +++ b/vhost_user_input.h @@ -0,0 +1,187 @@ +/* + * Based on virtio-input.h of QEMU project + * + * Copyright (c) 2022 Virtual Open Systems SAS. + * + * This work is licensed under the terms of the GNU GPL, version 2 or + * (at your option) any later version. See the COPYING file in the + * top-level directory. + */ + +#ifndef VHOST_USER_INPUT +#define VHOST_USER_INPUT + +#include "vhost_loopback.h" +#include "vhost_user_loopback.h" +#include "virtio_loopback.h" +#include <linux/virtio_input.h> +#include "queue.h" +#include <sys/mman.h> + +/* ----------------------------------------------------------------- */ +/* virtio input protocol */ + +typedef struct virtio_input_absinfo virtio_input_absinfo; +typedef struct virtio_input_config virtio_input_config; +typedef struct virtio_input_event virtio_input_event; + +/* ----------------------------------------------------------------- */ +/* qemu internals */ + +#define TYPE_VIRTIO_INPUT "virtio-input-device" +#define TYPE_VIRTIO_INPUT_HID "virtio-input-hid-device" +#define TYPE_VIRTIO_KEYBOARD "virtio-keyboard-device" +#define TYPE_VIRTIO_MOUSE "virtio-mouse-device" +#define TYPE_VIRTIO_TABLET "virtio-tablet-device" + +#define TYPE_VIRTIO_INPUT_HOST "virtio-input-host-device" + +#define TYPE_VHOST_USER_INPUT "vhost-user-input" + +typedef struct VirtIOInputConfig { + virtio_input_config config; + QTAILQ_ENTRY(VirtIOInputConfig) node; +} VirtIOInputConfig; + +struct VirtIOInputClass; + +typedef struct VirtIOInput { + VirtIODevice *parent_dev; + struct VirtIOInputClass *input_class; + uint8_t cfg_select; + uint8_t cfg_subsel; + uint32_t cfg_size; + QTAILQ_HEAD(, VirtIOInputConfig) cfg_list; + VirtQueue *evt, *sts; + char *serial; + + struct { + virtio_input_event event; + VirtQueueElement *elem; + } *queue; + uint32_t qindex, qsize; + + bool active; + +} VirtIOInput; + +typedef struct VirtIOInputClass { + VirtioDeviceClass *parent_class; + void (*realize)(); + void (*unrealize)(VirtIODevice *dev); + void (*change_active)(VirtIOInput *vinput); + void (*handle_status)(VirtIOInput *vinput, virtio_input_event *event); +} VirtIOInputClass; + +struct VirtIOInputHID { + VirtIOInput parent_obj; + char *display; + uint32_t head; + int ledstate; + bool wheel_axis; +}; + +struct VirtIOInputHost { + VirtIOInput parent_obj; + char *evdev; + int fd; +}; + +typedef struct VhostUserInput { + VirtIOInput *vdev_input; + struct vhost_dev *vhost_dev; + VirtIODevice *vdev; + bool started; + bool completed; +} VhostUserInput; + +#define VIRTIO_ID_NAME_KEYBOARD "QEMU Virtio Keyboard" +#define BUS_VIRTUAL 0x06 + + +/* + * Event types + */ + +#define EV_SYN 0x00 +#define EV_KEY 0x01 +#define EV_REL 0x02 +#define EV_ABS 0x03 +#define EV_MSC 0x04 +#define EV_SW 0x05 +#define EV_LED 0x11 +#define EV_SND 0x12 +#define EV_REP 0x14 +#define EV_FF 0x15 +#define EV_PWR 0x16 +#define EV_FF_STATUS 0x17 +#define EV_MAX 0x1f +#define EV_CNT (EV_MAX + 1) + +/* + * LEDs + */ + +#define LED_NUML 0x00 +#define LED_CAPSL 0x01 +#define LED_SCROLLL 0x02 +#define LED_COMPOSE 0x03 +#define LED_KANA 0x04 +#define LED_SLEEP 0x05 +#define LED_SUSPEND 0x06 +#define LED_MUTE 0x07 +#define LED_MISC 0x08 +#define LED_MAIL 0x09 +#define LED_CHARGING 0x0a +#define LED_MAX 0x0f +#define LED_CNT (LED_MAX + 1) + +/* + * Keys and buttons + * + * Most of the keys/buttons are modeled after USB HUT 1.12 + * (see http://www.usb.org/developers/hidpage). + * Abbreviations in the comments: + * AC - Application Control + * AL - Application Launch Button + * SC - System Control + */ +#define KEY_G 34 + +static struct virtio_input_config virtio_keyboard_config[] = { + { + .select = VIRTIO_INPUT_CFG_ID_NAME, + .size = sizeof(VIRTIO_ID_NAME_KEYBOARD), + .u.string = VIRTIO_ID_NAME_KEYBOARD, + },{ + .select = VIRTIO_INPUT_CFG_ID_DEVIDS, + .size = sizeof(struct virtio_input_devids), + .u.ids = { + .bustype = (BUS_VIRTUAL), + .vendor = (0x0627), /* same we use for usb hid devices */ + .product = (0x0001), + .version = (0x0001), + }, + },{ + .select = VIRTIO_INPUT_CFG_EV_BITS, + .subsel = EV_KEY, + .size = 1, + .u.bitmap = { + KEY_G, + }, + }, + {}, /* End of list */ +}; + +void vhost_user_backend_start(VirtIODevice *vdev); +void vhost_user_backend_stop(VirtIODevice *vdev); + +void virtio_input_init_config(VirtIOInput *vinput, + virtio_input_config *config); +void virtio_input_class_init(VirtIODevice *vdev); +void virtio_input_device_realize(); + +void vhost_user_input_init(VirtIODevice *vdev); +void vhost_user_input_realize(); + +#endif /* VHOST_USER_INPU */ |