| /* | |
| * kbdif.h -- Xen virtual keyboard/mouse | |
| * | |
| * Permission is hereby granted, free of charge, to any person obtaining a copy | |
| * of this software and associated documentation files (the "Software"), to | |
| * deal in the Software without restriction, including without limitation the | |
| * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or | |
| * sell copies of the Software, and to permit persons to whom the Software is | |
| * furnished to do so, subject to the following conditions: | |
| * | |
| * The above copyright notice and this permission notice shall be included in | |
| * all copies or substantial portions of the Software. | |
| * | |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
| * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING | |
| * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER | |
| * DEALINGS IN THE SOFTWARE. | |
| * | |
| * Copyright (C) 2005 Anthony Liguori <aliguori@us.ibm.com> | |
| * Copyright (C) 2006 Red Hat, Inc., Markus Armbruster <armbru@redhat.com> | |
| */ | |
| #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 | |
| * XenStore to communicate capabilities and to negotiate operating parameters. | |
| * This section enumerates these nodes which reside in the respective front and | |
| * backend portions of XenStore, following XenBus convention. | |
| * | |
| * All data in XenStore is stored as strings. Nodes specifying numeric | |
| * 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 | |
| * frontend then this must be set to 1. | |
| * | |
| * 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, | |
| * so every instance of the frontend can be identified by the backend | |
| * by this ID. This can be UUID or such. | |
| * | |
| *------------------------- Pointer Device Parameters ------------------------ | |
| * | |
| * width | |
| * Values: <uint> | |
| * | |
| * Maximum X coordinate (width) to be used by the frontend | |
| * while reporting input events, pixels, [0; UINT32_MAX]. | |
| * | |
| * 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 reporting input events, pixels, [0; UINT32_MAX]. | |
| * | |
| * multi-touch-height | |
| * Values: <uint> | |
| * | |
| * Height of the touch area to be used by the frontend | |
| * while reporting input events, pixels, [0; UINT32_MAX]. | |
| * | |
| ***************************************************************************** | |
| * 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 backend to report multi-touch events. | |
| * | |
| * request-raw-pointer | |
| * Values: <uint> | |
| * | |
| * Request backend to report raw unscaled absolute pointer coordinates. | |
| * This option is only valid if request-abs-pointer is also set. | |
| * Raw unscaled coordinates have the range [0, 0x7fff] | |
| * | |
| *----------------------- 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, not recommended for use. | |
| * PFN of the shared page. | |
| */ | |
| /* | |
| * EVENT CODES. | |
| */ | |
| #define XENKBD_TYPE_MOTION 1 | |
| #define XENKBD_TYPE_RESERVED 2 | |
| #define XENKBD_TYPE_KEY 3 | |
| #define XENKBD_TYPE_POS 4 | |
| #define XENKBD_TYPE_MTOUCH 5 | |
| /* Multi-touch event sub-codes */ | |
| #define XENKBD_MT_EV_DOWN 0 | |
| #define XENKBD_MT_EV_UP 1 | |
| #define XENKBD_MT_EV_MOTION 2 | |
| #define XENKBD_MT_EV_SYN 3 | |
| #define XENKBD_MT_EV_SHAPE 4 | |
| #define XENKBD_MT_EV_ORIENT 5 | |
| /* | |
| * CONSTANTS, XENSTORE FIELD AND PATH NAME STRINGS, HELPERS. | |
| */ | |
| #define XENKBD_DRIVER_NAME "vkbd" | |
| #define XENKBD_FIELD_FEAT_DSBL_KEYBRD "feature-disable-keyboard" | |
| #define XENKBD_FIELD_FEAT_DSBL_POINTER "feature-disable-pointer" | |
| #define XENKBD_FIELD_FEAT_ABS_POINTER "feature-abs-pointer" | |
| #define XENKBD_FIELD_FEAT_RAW_POINTER "feature-raw-pointer" | |
| #define XENKBD_FIELD_FEAT_MTOUCH "feature-multi-touch" | |
| #define XENKBD_FIELD_REQ_ABS_POINTER "request-abs-pointer" | |
| #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 "height" | |
| #define XENKBD_FIELD_MT_WIDTH "multi-touch-width" | |
| #define XENKBD_FIELD_MT_HEIGHT "multi-touch-height" | |
| #define XENKBD_FIELD_MT_NUM_CONTACTS "multi-touch-num-contacts" | |
| #define XENKBD_FIELD_UNIQUE_ID "unique-id" | |
| /* OBSOLETE, not recommended for use */ | |
| #define XENKBD_FIELD_RING_REF "page-ref" | |
| /* | |
| ***************************************************************************** | |
| * Description of the protocol between frontend and backend driver. | |
| ***************************************************************************** | |
| * | |
| * The two halves of a Para-virtual driver communicate with | |
| * each other using a shared page and an event channel. | |
| * Shared page contains a ring with event structures. | |
| * | |
| * All reserved fields in the structures below must be 0. | |
| * | |
| ***************************************************************************** | |
| * Backend to frontend events | |
| ***************************************************************************** | |
| * | |
| * Frontends should ignore unknown in events. | |
| * All event packets have the same length (40 octets) | |
| * All event packets have common header: | |
| * | |
| * 0 octet | |
| * +-----------------+ | |
| * | type | | |
| * +-----------------+ | |
| * type - uint8_t, event code, XENKBD_TYPE_??? | |
| * | |
| * | |
| * Pointer relative movement event | |
| * 0 1 2 3 octet | |
| * +----------------+----------------+----------------+----------------+ | |
| * | _TYPE_MOTION | reserved | 4 | |
| * +----------------+----------------+----------------+----------------+ | |
| * | rel_x | 8 | |
| * +----------------+----------------+----------------+----------------+ | |
| * | rel_y | 12 | |
| * +----------------+----------------+----------------+----------------+ | |
| * | rel_z | 16 | |
| * +----------------+----------------+----------------+----------------+ | |
| * | reserved | 20 | |
| * +----------------+----------------+----------------+----------------+ | |
| * |/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/| | |
| * +----------------+----------------+----------------+----------------+ | |
| * | 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; | |
| }; | |
| /* | |
| * Multi-touch event 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 | |
| * +----------------+----------------+----------------+----------------+ | |
| * | reserved | 8 | |
| * +----------------+----------------+----------------+----------------+ | |
| * | |
| * event_type - unt8_t, multi-touch event sub-type, 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 point can be identified by the ID of the sequence: contact ID. | |
| * Contact ID may be reused after XENKBD_MT_EV_UP event and | |
| * is in the [0; XENKBD_FIELD_NUM_CONTACTS - 1] range. | |
| * | |
| * For further information please refer to documentation on Wayland [1], | |
| * 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 | |
| * | |
| * | |
| * Multi-touch down event - sent when a new touch is made: touch is assigned | |
| * a unique contact ID, sent with this and consequent events related | |
| * to this touch. | |
| * 0 1 2 3 octet | |
| * +----------------+----------------+----------------+----------------+ | |
| * | _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 | |
| * 0 1 2 3 octet | |
| * +----------------+----------------+----------------+----------------+ | |
| * | _TYPE_MTOUCH | _MT_EV_UP | contact_id | reserved | 4 | |
| * +----------------+----------------+----------------+----------------+ | |
| * | reserved | 8 | |
| * +----------------+----------------+----------------+----------------+ | |
| * |/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/| | |
| * +----------------+----------------+----------------+----------------+ | |
| * | reserved | 40 | |
| * +----------------+----------------+----------------+----------------+ | |
| * | |
| * Multi-touch motion event | |
| * 0 1 2 3 octet | |
| * +----------------+----------------+----------------+----------------+ | |
| * | _TYPE_MTOUCH | _MT_EV_MOTION | 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 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 | 8 | |
| * +----------------+----------------+----------------+----------------+ | |
| * |/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/| | |
| * +----------------+----------------+----------------+----------------+ | |
| * | reserved | 40 | |
| * +----------------+----------------+----------------+----------------+ | |
| * | |
| * Multi-touch shape event - touch point's shape has changed its shape. | |
| * Shape is approximated by an ellipse through the major and minor axis | |
| * lengths: major is the longer diameter of the ellipse and minor is the | |
| * shorter one. Center of the ellipse is reported via | |
| * XENKBD_MT_EV_DOWN/XENKBD_MT_EV_MOTION events. | |
| * 0 1 2 3 octet | |
| * +----------------+----------------+----------------+----------------+ | |
| * | _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 { | |
| uint8_t type; /* XENKBD_TYPE_MTOUCH */ | |
| uint8_t event_type; /* XENKBD_MT_EV_??? */ | |
| uint8_t contact_id; | |
| uint8_t reserved[5]; /* reserved for the future use */ | |
| union { | |
| struct { | |
| int32_t abs_x; /* 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; | |
| struct xenkbd_motion motion; | |
| 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 the same length (40 octets) | |
| * 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; | |
| char pad[XENKBD_OUT_EVENT_SIZE]; | |
| }; | |
| /* | |
| ***************************************************************************** | |
| * Shared page | |
| ***************************************************************************** | |
| */ | |
| #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]) | |
| #define XENKBD_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; | |
| }; | |
| #endif /* __XEN_PUBLIC_IO_KBDIF_H__ */ |