117 lines
3.6 KiB
C
117 lines
3.6 KiB
C
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/*
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* kbdif.h -- Xen virtual keyboard/mouse
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*
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* Copyright (C) 2005 Anthony Liguori <aliguori@us.ibm.com>
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* Copyright (C) 2006 Red Hat, Inc., Markus Armbruster <armbru@redhat.com>
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*/
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#ifndef __XEN_PUBLIC_IO_KBDIF_H__
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#define __XEN_PUBLIC_IO_KBDIF_H__
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/* In events (backend -> frontend) */
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/*
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* Frontends should ignore unknown in events.
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*/
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/* Pointer movement event */
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#define XENKBD_TYPE_MOTION 1
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/* Event type 2 currently not used */
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/* Key event (includes pointer buttons) */
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#define XENKBD_TYPE_KEY 3
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/*
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* Pointer position event
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* Capable backend sets feature-abs-pointer in xenstore.
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* Frontend requests ot instead of XENKBD_TYPE_MOTION by setting
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* request-abs-update in xenstore.
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*/
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#define XENKBD_TYPE_POS 4
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struct xenkbd_motion {
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uint8_t type; /* XENKBD_TYPE_MOTION */
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int32_t rel_x; /* relative X motion */
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int32_t rel_y; /* relative Y motion */
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int32_t rel_z; /* relative Z motion (wheel) */
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};
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struct xenkbd_key {
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uint8_t type; /* XENKBD_TYPE_KEY */
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uint8_t pressed; /* 1 if pressed; 0 otherwise */
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uint32_t keycode; /* KEY_* from linux/input.h */
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};
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struct xenkbd_position {
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uint8_t type; /* XENKBD_TYPE_POS */
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int32_t abs_x; /* absolute X position (in FB pixels) */
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int32_t abs_y; /* absolute Y position (in FB pixels) */
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int32_t rel_z; /* relative Z motion (wheel) */
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};
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#define XENKBD_IN_EVENT_SIZE 40
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union xenkbd_in_event {
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uint8_t type;
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struct xenkbd_motion motion;
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struct xenkbd_key key;
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struct xenkbd_position pos;
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char pad[XENKBD_IN_EVENT_SIZE];
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};
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/* Out events (frontend -> backend) */
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/*
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* Out events may be sent only when requested by backend, and receipt
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* of an unknown out event is an error.
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* No out events currently defined.
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*/
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#define XENKBD_OUT_EVENT_SIZE 40
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union xenkbd_out_event {
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uint8_t type;
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char pad[XENKBD_OUT_EVENT_SIZE];
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};
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/* shared page */
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#define XENKBD_IN_RING_SIZE 2048
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#define XENKBD_IN_RING_LEN (XENKBD_IN_RING_SIZE / XENKBD_IN_EVENT_SIZE)
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#define XENKBD_IN_RING_OFFS 1024
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#define XENKBD_IN_RING(page) \
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((union xenkbd_in_event *)((char *)(page) + XENKBD_IN_RING_OFFS))
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#define XENKBD_IN_RING_REF(page, idx) \
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(XENKBD_IN_RING((page))[(idx) % XENKBD_IN_RING_LEN])
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#define XENKBD_OUT_RING_SIZE 1024
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#define XENKBD_OUT_RING_LEN (XENKBD_OUT_RING_SIZE / XENKBD_OUT_EVENT_SIZE)
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#define XENKBD_OUT_RING_OFFS (XENKBD_IN_RING_OFFS + XENKBD_IN_RING_SIZE)
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#define XENKBD_OUT_RING(page) \
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((union xenkbd_out_event *)((char *)(page) + XENKBD_OUT_RING_OFFS))
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#define XENKBD_OUT_RING_REF(page, idx) \
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(XENKBD_OUT_RING((page))[(idx) % XENKBD_OUT_RING_LEN])
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struct xenkbd_page {
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uint32_t in_cons, in_prod;
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uint32_t out_cons, out_prod;
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};
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#endif
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