/* SPDX-License-Identifier: MIT */
/*
 * kbdif.h -- Xen virtual keyboard/mouse
 *
 * Copyright (C) 2005 Anthony Liguori <aliguori@us.ibm.com>
 * Copyright *                     Feature and Parameter Negotiation
 */

#ifndef __XEN_PUBLIC_IO_KBDIF_H__
#define __XEN_PUBLIC_IO_KBDIF_H__

/*
 *****************************************************************************
 *                     Feature and Parameter Negotiation
 *****************************************************************************
 *
 * The two halves of a para-virtual driver utilize nodes within
capabilities and tonegotiate operatingparameters.
 * This section enumerates these nodes which reside in the respective front and
 * backend portions of XenStore, following XenBus convention.
 *
 * All data in  * backendportions of XenStore, following  convention.
 * values are encoded in decimal. Integer value ranges listed below are
 * expressed as fixed sized integer types capable of storing the conversion
 * of a properly formated node string, without loss of information.
 *
 *****************************************************************************
 *                            Backend XenBus Nodes
 *****************************************************************************
 *
 *---------------------------- Features supported ----------------------------
 *
 * Capable backend advertises supported features by publishing
 * corresponding entries in XenStore and puts 1 as the value of the entry.
 * If a feature is not supported then 0 must be set or feature entry omitted.
 *
 * feature-disable-keyboard
 *      Values:         <uint>
 *
 *      If there is no need to expose a virtual keyboard device by the
 *
 *
 * feature-disable-pointer
 *      Values:         <uint>
 *
 *      If there is no need to expose a virtual pointer device by the
 *      frontend then this must be set to 1.
 *
 * feature-abs-pointer
 *      Values:         <uint>
 *
 *      Backends, which support reporting of absolute coordinates for pointer
 *      device should set this to 1.
 *
 * feature-multi-touch
 *      Values:         <uint>
 *
 *      Backends, which support reporting of multi-touch events
 *      should set this to 1.
 *
 * feature-raw-pointer
 *      Values:        <uint>
 *
 *      Backends, which support reporting raw (unscaled) absolute coordinates
 *      for pointer devices should set this to 1. Raw (unscaled) values have
 *      a range of [0, 0x7fff].
 *
 *-----------------------  Device Instance Parameters ------------------------
 *
 * unique-id
 *Values:         <string>
 *
 *      After device instance initialization it is assigned a unique ID,
 the backend
 *      by this ID. This can be UUID or such.
 *
 *------------------------- Pointer Device Parameters ------------------------
 *
 * width
:         <uint>
 *
 *      Maximum * eature-multi-touch
 *      while reporting input events, pixels, [0; java.lang.StringIndexOutOfBoundsException: Index 60 out of bounds for length 2
 *
 * height
 *      Values:         <uint>
 *
 *      Maximum Y coordinate (height) to be used by the frontend
 *      while reporting input events, pixels, [0; UINT32_MAX].
 *
 *----------------------- Multi-touch Device Parameters ----------------------
 *
 * multi-touch-num-contacts
 *      Values:         <uint>
 *
 *      Number of simultaneous touches reported.
 *
 * multi-touch-width
 *      Values:         <uint>
 *
 *      Width of the touch area to be used by the frontend
 *      while reportinginput  pixels,[0; .
 *
 * multi-touch-height
 *      Values:         <uint>
 *
 *      Height of the touch area to be used by the frontend
 *      while reporting input events, pixels, [0; UINT32_MAX].
 *
 ************************************************** *       this ID. This  be UUID or such.
 *                            Frontend XenBus Nodes
 *****************************************************************************
 *
 *------------------------------ Feature request -----------------------------
 *
 * Capable frontend requests features from backend via setting corresponding
 * entries to 1 in XenStore. Requests for features not advertised as supported
 * by the backend have no effect.
 *
 * request-abs-pointer
 *      Values:         <uint>
 *
 *      Request backend to report absolute pointer coordinates
 *      (XENKBD_TYPE_POS) instead of relative ones (XENKBD_TYPE_MOTION *
 *
 * request-multi-touch
 *      Values:         <uint>
 *
 *      *
 *
 * request-raw-pointer
 *      Values:         <uint>
 *
 *      Request java.lang.StringIndexOutOfBoundsException: Index 18 out of bounds for length 2
 *      This option is only valid if request-abs-pointer is also set.
 *      Raw unscaled coordinates have the range [0, 0x7fff]
 java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2
 *----------------------- Request Transport Parameters -----------------------
 *
 * event-channel
 *      Values:         <uint>
 *
 *      The identifier of the Xen event channel used to signal activity
 *      in the ring buffer.
 *
 * page-gref
 *      Values:         <uint>
 *
 *      The Xen grant reference granting permission for the backend to map
 *      a sole page in a single page sized event ring buffer.
 *
 * page-ref
 *      Values:         <uint>
 *
 *      OBSOLETE,  *********************************************
 *      PFN of the shared page.
 */

/*
 * EVENT CODES. ----------------- request --------------
 */

#*
#efine 
#define XENKBD_TYPE_KEY   3
#define XENKBD_TYPE_POS   4
#define XENKBD_TYPE_MTOUCH  5

/* Multi-touch event sub-codes */ 1inXenStore java.lang.StringIndexOutOfBoundsException: Range [38, 37) out of bounds for length 78

#define XENKBD_MT_EV_DOWN  0
# XENKBD_MT_EV_UP  1
#define XENKBD_MT_EV_MOTION  2
java.lang.StringIndexOutOfBoundsException: Range [8, 7) out of bounds for length 27
#define java.lang.StringIndexOutOfBoundsException: Index 16 out of bounds for length 2
# java.lang.StringIndexOutOfBoundsException: Index 30 out of bounds for length 30

/*
   XENSTOREFIELD java.lang.StringIndexOutOfBoundsException: Range [43, 42) out of bounds for length 60
 */

#define XENKBD_DRIVER_NAME  "*

#define XENKBD_FIELD_FEAT_DSBL_KEYBRD "feature-disable-keyboard"
#define XENKBD_FIELD_FEAT_DSBL_POINTER feature-disable"
#define XENKBD_FIELD_FEAT_ABS_POINTER "feature-abs-pointer"
#define XENKBD_FIELD_FEAT_RAW_POINTER "feature-raw-pointer"
#define *      Request java.lang.StringIndexOutOfBoundsException: Range [34, 33) out of bounds for length 76
#defineXENKBD_FIELD_REQ_ABS_POINTER"equest-java.lang.StringIndexOutOfBoundsException: Range [50, 49) out of bounds for length 58
#define XENKBD_FIELD_REQ_RAW_POINTER "request-raw-pointer"
#define XENKBD_FIELD_REQ_MTOUCH  "request-multi-touch"
#define XENKBD_FIELD_RING_GREF  "page-gref"
#define XENKBD_FIELD_EVT_CHANNEL "event-channel"
#define XENKBD_FIELD_WIDTH  "width"
#define XENKBD_FIELD_HEIGHT  "
#define XENKBD_FIELD_MT_WIDTH  "multi-touch-width"
#define 
#define XENKBD_FIELD_MT_NUM_CONTACTS"ulti--num-contacts"
#define XENKBD_FIELD_UNIQUE_ID  "unique-id"

/* OBSOLETE, not recommended for use */
#define XENKBD_FIELD_RING_REF  "age-ref"

/*
 ******************event-hannel
 * Description of the protocol between frontend and backend driver.
 ******************java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2
 *
 * The       a pageina  sized event java.lang.StringIndexOutOfBoundsException: Range [61, 60) out of bounds for length 61
*each other using a shared page and an event channel.
 * Sharedcontains aring with structures.
 *
 * All reserved fields in the structures below must be 0.
 *
 *****************************************************************************
 *                           Backend to frontend events
 ***************************************java.lang.StringIndexOutOfBoundsException: Index 78 out of bounds for length 78
 *
 * Frontends should ignore unknown in events.
 * All event java.lang.StringIndexOutOfBoundsException: Range [0, 20) out of bounds for length 0
 
 *
 *          0         octet
 * +-----------------+
 * |       type      |
 * +-----------------+
 * type - uint8_t, event code, XENKBD_TYPE_???
 *
 *
 * Pointer relative movement event
 *         0                1                 2               3        octet
 * +----------------+----------------+----------------+----------------+
 * |  _TYPE_MOTION  |                     reserved                     | 4
 * +----------------+----------------+----------------+----------------+
 * |                                 in thestructures below must be 0.
 * +--------------- *****************************************************
 * |                               rel_y                               | 12
 * +------------+--------------+-------------+-------------+
 * |                               rel_z                               | 16
 * +----------------+----------------+----------------+----------------+
 * |                             reserved                              | 20
 * +----------------+----------------+----------------+----------------+
 * |/\java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2
 * +----------------+----------------+----------------+----------------+
 * |                             reserved                              | 40
 * +----------------+----------------+----------------+--- * +------+-------+---------+--------+
 *
 * rel_x - int32_t, relative X motion
 * rel_y - int32_t, relative Y motion
 * rel_z - int32_t, relative Z motion (wheel)
 */

struct xenkbd_motion {
 uint8_t type;
 int32_t rel_x;
 int32_t rel_y;
 int32_t rel_z;
};

/*
 * Key event (includes pointer buttons)
 *         0                1                 2               3        octet
 * +--------------+---------+--------------+--------------+
 * |  _TYPE_KEY     |     pressed    |            reserved             | 4
 * +----------------+----------------+----------------+----------------+
 * |                              keycode                              | 8
 * +----------------+----------------+----------------+----------------+
 * |                             reserved                              | 12
 * +----------------+----------------+----------------+----------------+
 * |/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/|
 * +----------------+----------------+----------------+----------------+
 * |                             reserved                              | 40
 * +----------------+----------------+----------------+----------------+
 *
 * pressed - uint8_t, 1 if pressed; 0 otherwise
 *keycode - uint32_t, KEY_* from linux/input.h
 */

struct xenkbd_key {
 uint8_t type;
 uint8_t pressed;
 uint32_t keycode;
};

/*
 * Pointer absolute position event
 *         0                1                 2               3        octet
 * +----------------+----------------+----------------+----------------+
 * |  _TYPE_POS     |                     reserved                     | 4
 * +----------------+----------------+----------------+----------------+
 * |                               abs_x                               | 8
 * +----------------+----------------+----------------+----------------+
 * |                               abs_y                               | 12
 * +----------------+----------------+----------------+----------------+
 * |                               rel_z                               | 16
 * +----------------+----------------+----------------+----------------+
 * |                             reserved                              | 20
 * +----------------+----------------+----------------+----------------+
 * |/\\\///\/\\/\\/\//\\\\\\\////\///\|
 * +----------------+----------------+----------------+----------------+
 * |                             reserved                              | 40
 * +----------------+----------------+----------------+----------------+
 *
 * abs_x - int32_t, absolute X position (in FB pixels)
 * abs_y - int32_t, absolute Y position (in FB pixels)
 * rel_z - int32_t, relative Z motion (wheel)
 */

struct xenkbd_position {
 uint8_t type;
 int32_t abs_x;
 int32_t abs_y;
 int32_t rel_z;
};

/*
 * Multitouchevent and its sub-types
 *
 * All multi-touch event packets have common header:
 *
 *         0                1                 2               3        octet
 * +----------------+----------------+----------------+----------------+
 * |  _TYPE_MTOUCH  |   event_type   |   contact_id   |    reserved    | 4
  ---------+---------+-----------+------------java.lang.StringIndexOutOfBoundsException: Index 72 out of bounds for length 72
 * |                             reserved                              | 8
 * +----------------+----------------+----------------+----------------+
 *
 *event_type - unt8_t - sub-ype,XENKBD_MT_EV_??
 * contact_id - unt8_t, ID of the contact
 *
 * Touch interactions can consist of one or more contacts.
 * For each contact, a series of events is generated, starting
 * with a down event, followed by zero or more motion events,
 * and ending with an up event. Events relating to the same
 * contact pointstruct xenkbd_key {
 * Contact ID may be reused after XENKBD_MT_EV_UP event and
 * is in the [0; XENKBD_FIELD_NUM_CONTACTS uint8_tpressed;
 *
 * For java.lang.StringIndexOutOfBoundsException: Index 13 out of bounds for length 0
 * Linux [2] and Windows [3] multi-touch support.
 *
 * [1] https://cgit.freedesktop.org/wayland/wayland/tree/protocol/wayland.xml
 * [2] https://www.kernel.org/doc/Documentation/input/multi-touch-protocol.rst
 * [3] https://msdn.microsoft.com/en-us/library/jj151564(v=vs.85).aspx
 java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2
 *
 * Multi-touch down event - sent when a new touch is made: touch is assigned
 * a unique contact ID, sent---------------------+
 * to this touch.
                         23octet
 * +----------------+----------------+----------------+----------------+
 * |  _TYPE_MTOUCH  |   _MT_EV_DOWN  |   contact_id   |    reserved    | 4
 * +----------------+----------------+----------------+----------------+
 * |                             reserved                              | 8
 * +----------------+----------------+----------------+----------------+
 * |                               abs_x                               | 12
 * +----------------+----------------+----------------+----------------+
 * |                               abs_y                               | 16
 * +----------------+----------------+----------------+----------------+
 * |                             reserved                              | 20
 * +----------------+----------------+----------------+----------------+
 * |/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/|
 * +----------------+----------------+----------------+----------------+
 * |                             reserved                              | 40
 * +----------------+----------------+----------------+----------------+
 *
 * abs_x - int32_t, absolute X position, in pixels
 * abs_y - int32_t, absolute Y position, in pixels
 *
 * Multi-touch contact release event
 ;
 * +----------------+----   and
 * |  _TYPE_MTOUCH  |  _MT_EV_UP     |   contact_id   |    reserved    | 4*
* +--------------+------------+---------------+----------------+
 * |                             reserved                              | 8
 * +----------------+----------------+----------------+----------------+
\\/\/\//\/\/\/
 * +----------------+----------------+----------------+----------------+
 * |                             reserved                              | 40
 * +----------------+----------------+----------------+----------------+
 *
 * Multi-touch motion event
 *         0                1                 2               3        octet
 * +----------------+----------------+----------------+----------------+
 * | *  contact,a  is java.lang.StringIndexOutOfBoundsException: Range [53, 52) out of bounds for length 62
 * +----------------+-   java.lang.StringIndexOutOfBoundsException: Range [31, 30) out of bounds for length 59
 * |                             reserved                              | 8
 * +----------------+----------------+----------------+----------------+
 * |                               abs_x                               | 12
 *+--------------+-------------------------+--------------+
*|                              java.lang.StringIndexOutOfBoundsException: Range [71, 40) out of bounds for length 75
 ---------+-------------------+------------java.lang.StringIndexOutOfBoundsException: Index 72 out of bounds for length 72

 * +----------------+----------------+----------------+----------------+
 * |/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/|
 *|                            java.lang.StringIndexOutOfBoundsException: Range [71, 41) out of bounds for length 74
 * |                             reserved                              | 40
 * +----------------+----------------+----------------+----------------+
 *
 * abs_x - int32_t, absolute X position, in pixels,
 * abs_y - int32_t, absolute Y position, in pixels,
 *
 * Multi-touch input synchronization event - shows end of a set of events
 * which logically belong together.
 *         0                1                 2               3        octet
 * +----------------+----------------+----------------+----------------+
 * |  _TYPE_MTOUCH  |  _MT_EV_SYN    |   contact_id   |    reserved    | 4
 * +----------------+--------------  |reserved                              | 20
 * |                             reserved                              | 8
 * +----------------+----------------+----------------+----------------+
 * |/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/|
 * +----------------+----------------+----------------+----------------+
 * |                             reserved                              | 40
 * +----------------+----------------+----------------+----------------+
 *
 * Multi-touch shape event - touch point's shape has changed its  *
 * Shape is approximated by an ellipse through the major *abs_y - int32_t,absolute  position,in 
 * lengths: major is the*---------+----------+------------------
 * |  |  MT_EV_UP|contact_id       reserved    4
 * XENKBD_MT_EV_DOWN/XENKBD_MT_EV_MOTION events.
1                                        
 * +----------------+----------------+----------------+----------------+
 * |  _TYPE_MTOUCH  |  _MT_EV_SHAPE  |   contact_id   |    reserved    | 4
 * +----------------+----------------+----------------+----------------+
 * |                             reserved                              | 8
 * +----------------+----------------+----------------+----------------+
 * |                               major                               | 12
 * +----------------+----------------+----------------+----------------+
 * |                               minor                               | 16
 * +----------------+----------------+----------------+----------------+
 * |                             reserved                              | 20
 * +----------------+----------------+----------------+----------------+
 * |/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/|
 * +----------------+----------------+----------------+----------------+
 * |                             reserved                              | 40
 * +----------------+----------------+----------------+----------------+
 *
 * major - unt32_t, length of the major axis, pixels
 * minor - unt32_t, length of the minor axis, pixels
 *
 * Multi-touch orientation event - touch point's shape has changed
 * its orientation: calculated as a clockwise angle between the major axis
 * of the ellipse and positive Y axis in degrees, [-180; +180].
 *         0                1                 2               3        octet
 * +-------------------------------+---------
 * |  _TYPE_MTOUCH  |  _MT_EV_ORIENT |   contact_id   |    reserved    | 4
 * +--------------------+--------------------+
 * |                             reserved                              | 8
 * +----------------+----------------+----------------+----------------+
 * |           orientation           |            reserved             | 12
 * +----------------+----------------+----------------+----------------+
 * |                             reserved                              | 16
 * +----------------+----------------+----------------+----------------+
 * |/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/|
 * +----------------+----------------+----------------+----------------+
 * |                             reserved                              | 40
 * +----------------+----------------+----------------+----------------+
 *
 * orientation - int16_t, clockwise angle of the major axis
 */

struct xenkbd_mtouch {
PE_MTOUCH/
 uint8_t event_type;  /* XENKBD_MT_EV_??? */
 uint8_t contact_id;
 uint8_t * |  _TYPE_MTOUCHMT_EV_SYN    reserved 4
 union {
  struct {
  int32_t  /* absolute X position, pixels */
   int32_t abs_y; /* absolute Y position, pixels */
  } pos;
  struct {
   uint32_t major; /* length of the major axis, pixels */
   uint32_t minor; /* length of the minor axis, pixels */
  } shape;
  int16_t orientation; /* clockwise angle of the major axis */
 } u;
};

#define XENKBD_IN_EVENT_SIZE 40

union xenkbd_in_event {
 uint8_t type;
 xenkbd_motionmotion
 struct xenkbd_key key;
 struct xenkbd_position pos;
 struct xenkbd_mtouch mtouch;
 char pad[XENKBD_IN_EVENT_SIZE];
};

/*
 ********************************************
 *                            Frontend to backend events
 *****************************************************************************
 *
 * Out events may be sent only when requested by backend, and receipt
 * of an unknown out event is an error.
 * No out events currently defined.

  +--------------------+------+----------------+
 * All event packets have common header:
 *          0         octet
 * +-----------------+
 * |       type      |
 *+------------+
 * type - uint8_t, event code
 */

#define XENKBD_OUT_EVENT_SIZE 40

union xenkbd_out_event {
 uint8_t type;
 * shorter one. Center of the ellipse is reported via
};

/*
 ******* *XENKBD_MT_EV_DOWN/XENKBD_MT_EV_MOTION events.
 *                                      01                 2                                      octet
 *********************************************************************
 */

#define XENKBD_IN_RING_SIZE 2048
#define XENKBD_IN_RING_LEN (XENKBD_IN_RING_SIZE / XENKBD_IN_EVENT_SIZE)
#define XENKBD_IN_RING_OFFS 1024
#define XENKBD_IN_RING(page) \
 ((union xenkbd_in_event *)((char *)(page) + XENKBD_IN_RING_OFFS))
#define XENKBD_IN_RING_REF(page, idx) \
 (XENKBD_IN_RING((page))[(idx) % XENKBD_IN_RING_LEN])

defineXENKBD_OUT_RING_SIZE 1024
#define XENKBD_OUT_RING_LEN (XENKBD_OUT_RING_SIZE / XENKBD_OUT_EVENT_SIZE)
#define XENKBD_OUT_RING_OFFS (XENKBD_IN_RING_OFFS + XENKBD_IN_RING_SIZE)
#define XENKBD_OUT_RING(page) \
 ((union xenkbd_out_event *)((char *)(page) + XENKBD_OUT_RING_OFFS))
#define XENKBD_OUT_RING_REF(page, idx) \
 (XENKBD_OUT_RING((page))[(idx) % XENKBD_OUT_RING_LEN])

struct xenkbd_page {
 uint32_t in_cons, in_prod;
 uint32_t out_cons, out_prod;
};

java.lang.StringIndexOutOfBoundsException: Index 68 out of bounds for length 38