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1.1 root 1: /*
2: * kbdif.h -- Xen virtual keyboard/mouse
3: *
4: * Permission is hereby granted, free of charge, to any person obtaining a copy
5: * of this software and associated documentation files (the "Software"), to
6: * deal in the Software without restriction, including without limitation the
7: * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
8: * sell copies of the Software, and to permit persons to whom the Software is
9: * furnished to do so, subject to the following conditions:
10: *
11: * The above copyright notice and this permission notice shall be included in
12: * all copies or substantial portions of the Software.
13: *
14: * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15: * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16: * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17: * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18: * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
19: * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
20: * DEALINGS IN THE SOFTWARE.
21: *
22: * Copyright (C) 2005 Anthony Liguori <[email protected]>
23: * Copyright (C) 2006 Red Hat, Inc., Markus Armbruster <[email protected]>
24: */
25:
26: #ifndef __XEN_PUBLIC_IO_KBDIF_H__
27: #define __XEN_PUBLIC_IO_KBDIF_H__
28:
29: /* In events (backend -> frontend) */
30:
31: /*
32: * Frontends should ignore unknown in events.
33: */
34:
35: /* Pointer movement event */
36: #define XENKBD_TYPE_MOTION 1
37: /* Event type 2 currently not used */
38: /* Key event (includes pointer buttons) */
39: #define XENKBD_TYPE_KEY 3
40: /*
41: * Pointer position event
42: * Capable backend sets feature-abs-pointer in xenstore.
43: * Frontend requests ot instead of XENKBD_TYPE_MOTION by setting
44: * request-abs-update in xenstore.
45: */
46: #define XENKBD_TYPE_POS 4
47:
48: struct xenkbd_motion
49: {
50: uint8_t type; /* XENKBD_TYPE_MOTION */
51: int32_t rel_x; /* relative X motion */
52: int32_t rel_y; /* relative Y motion */
53: int32_t rel_z; /* relative Z motion (wheel) */
54: };
55:
56: struct xenkbd_key
57: {
58: uint8_t type; /* XENKBD_TYPE_KEY */
59: uint8_t pressed; /* 1 if pressed; 0 otherwise */
60: uint32_t keycode; /* KEY_* from linux/input.h */
61: };
62:
63: struct xenkbd_position
64: {
65: uint8_t type; /* XENKBD_TYPE_POS */
66: int32_t abs_x; /* absolute X position (in FB pixels) */
67: int32_t abs_y; /* absolute Y position (in FB pixels) */
68: int32_t rel_z; /* relative Z motion (wheel) */
69: };
70:
71: #define XENKBD_IN_EVENT_SIZE 40
72:
73: union xenkbd_in_event
74: {
75: uint8_t type;
76: struct xenkbd_motion motion;
77: struct xenkbd_key key;
78: struct xenkbd_position pos;
79: char pad[XENKBD_IN_EVENT_SIZE];
80: };
81:
82: /* Out events (frontend -> backend) */
83:
84: /*
85: * Out events may be sent only when requested by backend, and receipt
86: * of an unknown out event is an error.
87: * No out events currently defined.
88: */
89:
90: #define XENKBD_OUT_EVENT_SIZE 40
91:
92: union xenkbd_out_event
93: {
94: uint8_t type;
95: char pad[XENKBD_OUT_EVENT_SIZE];
96: };
97:
98: /* shared page */
99:
100: #define XENKBD_IN_RING_SIZE 2048
101: #define XENKBD_IN_RING_LEN (XENKBD_IN_RING_SIZE / XENKBD_IN_EVENT_SIZE)
102: #define XENKBD_IN_RING_OFFS 1024
103: #define XENKBD_IN_RING(page) \
104: ((union xenkbd_in_event *)((char *)(page) + XENKBD_IN_RING_OFFS))
105: #define XENKBD_IN_RING_REF(page, idx) \
106: (XENKBD_IN_RING((page))[(idx) % XENKBD_IN_RING_LEN])
107:
108: #define XENKBD_OUT_RING_SIZE 1024
109: #define XENKBD_OUT_RING_LEN (XENKBD_OUT_RING_SIZE / XENKBD_OUT_EVENT_SIZE)
110: #define XENKBD_OUT_RING_OFFS (XENKBD_IN_RING_OFFS + XENKBD_IN_RING_SIZE)
111: #define XENKBD_OUT_RING(page) \
112: ((union xenkbd_out_event *)((char *)(page) + XENKBD_OUT_RING_OFFS))
113: #define XENKBD_OUT_RING_REF(page, idx) \
114: (XENKBD_OUT_RING((page))[(idx) % XENKBD_OUT_RING_LEN])
115:
116: struct xenkbd_page
117: {
118: uint32_t in_cons, in_prod;
119: uint32_t out_cons, out_prod;
120: };
121:
122: #endif
123:
124: /*
125: * Local variables:
126: * mode: C
127: * c-set-style: "BSD"
128: * c-basic-offset: 4
129: * tab-width: 4
130: * indent-tabs-mode: nil
131: * End:
132: */
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