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authorMarkus Armbruster <armbru@redhat.com>2008-04-02 13:54:07 -0400
committerIngo Molnar <mingo@elte.hu>2008-04-24 17:57:33 -0400
commit4ee36dc08e5c4d16d078f59acd6d9d536f9718dd (patch)
tree284527b0418065b0092d7cc9ea3ee6d899a5a53e /include/xen
parent4f93f09b72d6ff47b2399b79ed6d1cbc7dbf991b (diff)
xen pvfb: Para-virtual framebuffer, keyboard and pointer driver
This is a pair of Xen para-virtual frontend device drivers: drivers/video/xen-fbfront.c provides a framebuffer, and drivers/input/xen-kbdfront provides keyboard and mouse. The backends run in dom0 user space. The two drivers are not in two separate patches, because the intermediate step (one driver, not the other) is somewhat problematic: the backend in dom0 needs both drivers, and will refuse to complete device initialization unless they're both present. Signed-off-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'include/xen')
-rw-r--r--include/xen/interface/io/fbif.h124
-rw-r--r--include/xen/interface/io/kbdif.h114
2 files changed, 238 insertions, 0 deletions
diff --git a/include/xen/interface/io/fbif.h b/include/xen/interface/io/fbif.h
new file mode 100644
index 000000000000..5a934dd7796d
--- /dev/null
+++ b/include/xen/interface/io/fbif.h
@@ -0,0 +1,124 @@
1/*
2 * fbif.h -- Xen virtual frame buffer device
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 <aliguori@us.ibm.com>
23 * Copyright (C) 2006 Red Hat, Inc., Markus Armbruster <armbru@redhat.com>
24 */
25
26#ifndef __XEN_PUBLIC_IO_FBIF_H__
27#define __XEN_PUBLIC_IO_FBIF_H__
28
29/* Out events (frontend -> backend) */
30
31/*
32 * Out events may be sent only when requested by backend, and receipt
33 * of an unknown out event is an error.
34 */
35
36/* Event type 1 currently not used */
37/*
38 * Framebuffer update notification event
39 * Capable frontend sets feature-update in xenstore.
40 * Backend requests it by setting request-update in xenstore.
41 */
42#define XENFB_TYPE_UPDATE 2
43
44struct xenfb_update {
45 uint8_t type; /* XENFB_TYPE_UPDATE */
46 int32_t x; /* source x */
47 int32_t y; /* source y */
48 int32_t width; /* rect width */
49 int32_t height; /* rect height */
50};
51
52#define XENFB_OUT_EVENT_SIZE 40
53
54union xenfb_out_event {
55 uint8_t type;
56 struct xenfb_update update;
57 char pad[XENFB_OUT_EVENT_SIZE];
58};
59
60/* In events (backend -> frontend) */
61
62/*
63 * Frontends should ignore unknown in events.
64 * No in events currently defined.
65 */
66
67#define XENFB_IN_EVENT_SIZE 40
68
69union xenfb_in_event {
70 uint8_t type;
71 char pad[XENFB_IN_EVENT_SIZE];
72};
73
74/* shared page */
75
76#define XENFB_IN_RING_SIZE 1024
77#define XENFB_IN_RING_LEN (XENFB_IN_RING_SIZE / XENFB_IN_EVENT_SIZE)
78#define XENFB_IN_RING_OFFS 1024
79#define XENFB_IN_RING(page) \
80 ((union xenfb_in_event *)((char *)(page) + XENFB_IN_RING_OFFS))
81#define XENFB_IN_RING_REF(page, idx) \
82 (XENFB_IN_RING((page))[(idx) % XENFB_IN_RING_LEN])
83
84#define XENFB_OUT_RING_SIZE 2048
85#define XENFB_OUT_RING_LEN (XENFB_OUT_RING_SIZE / XENFB_OUT_EVENT_SIZE)
86#define XENFB_OUT_RING_OFFS (XENFB_IN_RING_OFFS + XENFB_IN_RING_SIZE)
87#define XENFB_OUT_RING(page) \
88 ((union xenfb_out_event *)((char *)(page) + XENFB_OUT_RING_OFFS))
89#define XENFB_OUT_RING_REF(page, idx) \
90 (XENFB_OUT_RING((page))[(idx) % XENFB_OUT_RING_LEN])
91
92struct xenfb_page {
93 uint32_t in_cons, in_prod;
94 uint32_t out_cons, out_prod;
95
96 int32_t width; /* width of the framebuffer (in pixels) */
97 int32_t height; /* height of the framebuffer (in pixels) */
98 uint32_t line_length; /* length of a row of pixels (in bytes) */
99 uint32_t mem_length; /* length of the framebuffer (in bytes) */
100 uint8_t depth; /* depth of a pixel (in bits) */
101
102 /*
103 * Framebuffer page directory
104 *
105 * Each directory page holds PAGE_SIZE / sizeof(*pd)
106 * framebuffer pages, and can thus map up to PAGE_SIZE *
107 * PAGE_SIZE / sizeof(*pd) bytes. With PAGE_SIZE == 4096 and
108 * sizeof(unsigned long) == 4, that's 4 Megs. Two directory
109 * pages should be enough for a while.
110 */
111 unsigned long pd[2];
112};
113
114/*
115 * Wart: xenkbd needs to know resolution. Put it here until a better
116 * solution is found, but don't leak it to the backend.
117 */
118#ifdef __KERNEL__
119#define XENFB_WIDTH 800
120#define XENFB_HEIGHT 600
121#define XENFB_DEPTH 32
122#endif
123
124#endif
diff --git a/include/xen/interface/io/kbdif.h b/include/xen/interface/io/kbdif.h
new file mode 100644
index 000000000000..fb97f4284ffd
--- /dev/null
+++ b/include/xen/interface/io/kbdif.h
@@ -0,0 +1,114 @@
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 <aliguori@us.ibm.com>
23 * Copyright (C) 2006 Red Hat, Inc., Markus Armbruster <armbru@redhat.com>
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
48struct xenkbd_motion {
49 uint8_t type; /* XENKBD_TYPE_MOTION */
50 int32_t rel_x; /* relative X motion */
51 int32_t rel_y; /* relative Y motion */
52};
53
54struct xenkbd_key {
55 uint8_t type; /* XENKBD_TYPE_KEY */
56 uint8_t pressed; /* 1 if pressed; 0 otherwise */
57 uint32_t keycode; /* KEY_* from linux/input.h */
58};
59
60struct xenkbd_position {
61 uint8_t type; /* XENKBD_TYPE_POS */
62 int32_t abs_x; /* absolute X position (in FB pixels) */
63 int32_t abs_y; /* absolute Y position (in FB pixels) */
64};
65
66#define XENKBD_IN_EVENT_SIZE 40
67
68union xenkbd_in_event {
69 uint8_t type;
70 struct xenkbd_motion motion;
71 struct xenkbd_key key;
72 struct xenkbd_position pos;
73 char pad[XENKBD_IN_EVENT_SIZE];
74};
75
76/* Out events (frontend -> backend) */
77
78/*
79 * Out events may be sent only when requested by backend, and receipt
80 * of an unknown out event is an error.
81 * No out events currently defined.
82 */
83
84#define XENKBD_OUT_EVENT_SIZE 40
85
86union xenkbd_out_event {
87 uint8_t type;
88 char pad[XENKBD_OUT_EVENT_SIZE];
89};
90
91/* shared page */
92
93#define XENKBD_IN_RING_SIZE 2048
94#define XENKBD_IN_RING_LEN (XENKBD_IN_RING_SIZE / XENKBD_IN_EVENT_SIZE)
95#define XENKBD_IN_RING_OFFS 1024
96#define XENKBD_IN_RING(page) \
97 ((union xenkbd_in_event *)((char *)(page) + XENKBD_IN_RING_OFFS))
98#define XENKBD_IN_RING_REF(page, idx) \
99 (XENKBD_IN_RING((page))[(idx) % XENKBD_IN_RING_LEN])
100
101#define XENKBD_OUT_RING_SIZE 1024
102#define XENKBD_OUT_RING_LEN (XENKBD_OUT_RING_SIZE / XENKBD_OUT_EVENT_SIZE)
103#define XENKBD_OUT_RING_OFFS (XENKBD_IN_RING_OFFS + XENKBD_IN_RING_SIZE)
104#define XENKBD_OUT_RING(page) \
105 ((union xenkbd_out_event *)((char *)(page) + XENKBD_OUT_RING_OFFS))
106#define XENKBD_OUT_RING_REF(page, idx) \
107 (XENKBD_OUT_RING((page))[(idx) % XENKBD_OUT_RING_LEN])
108
109struct xenkbd_page {
110 uint32_t in_cons, in_prod;
111 uint32_t out_cons, out_prod;
112};
113
114#endif