1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
|
/*
* Copyright 1992 by Rich Murphey <Rich@Rice.edu>
* Copyright 1993 by David Wexelblat <dwex@goblin.org>
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the names of Rich Murphey and David Wexelblat
* not be used in advertising or publicity pertaining to distribution of
* the software without specific, written prior permission. Rich Murphey and
* David Wexelblat make no representations about the suitability of this
* software for any purpose. It is provided "as is" without express or
* implied warranty.
*
* RICH MURPHEY AND DAVID WEXELBLAT DISCLAIM ALL WARRANTIES WITH REGARD TO
* THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS, IN NO EVENT SHALL RICH MURPHEY OR DAVID WEXELBLAT BE LIABLE FOR
* ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
* RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
* CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
*/
#ifdef HAVE_XORG_CONFIG_H
#include <xorg-config.h>
#endif
#include <X11/X.h>
#include "xf86.h"
#include "xf86Priv.h"
#include <errno.h>
#include <sys/mman.h>
#include "xf86_OSlib.h"
#include "xf86OSpriv.h"
#if defined(__NetBSD__) && !defined(MAP_FILE)
#define MAP_FLAGS MAP_SHARED
#else
#define MAP_FLAGS (MAP_FILE | MAP_SHARED)
#endif
#ifdef __OpenBSD__
#define SYSCTL_MSG "\tCheck that you have set 'machdep.allowaperture=1'\n"\
"\tin /etc/sysctl.conf and reboot your machine\n" \
"\trefer to xf86(4) for details\n"
#define SYSCTL_MSG2 \
"Check that you have set 'machdep.allowaperture=2'\n" \
"\tin /etc/sysctl.conf and reboot your machine\n" \
"\trefer to xf86(4) for details\n"
#endif
/***************************************************************************/
/* Video Memory Mapping section */
/***************************************************************************/
static Bool useDevMem = FALSE;
static int devMemFd = -1;
#ifdef HAS_APERTURE_DRV
#define DEV_APERTURE "/dev/xf86"
#endif
/*
* Check if /dev/mem can be mmap'd. If it can't print a warning when
* "warn" is TRUE.
*/
static void
checkDevMem(Bool warn)
{
static Bool devMemChecked = FALSE;
int fd;
void *base;
if (devMemChecked)
return;
devMemChecked = TRUE;
#ifdef HAS_APERTURE_DRV
/* Try the aperture driver first */
if ((fd = open(DEV_APERTURE, O_RDWR)) >= 0) {
/* Try to map a page at the VGA address */
base = mmap((caddr_t)0, 4096, PROT_READ | PROT_WRITE,
MAP_FLAGS, fd, (off_t)0xA0000);
if (base != MAP_FAILED) {
munmap((caddr_t)base, 4096);
devMemFd = fd;
useDevMem = TRUE;
xf86Msg(X_PROBED, "checkDevMem: using aperture driver %s\n",
DEV_APERTURE);
return;
}
else {
if (warn) {
xf86Msg(X_WARNING, "checkDevMem: failed to mmap %s (%s)\n",
DEV_APERTURE, strerror(errno));
}
}
}
#endif
if ((fd = open(DEV_MEM, O_RDWR)) >= 0) {
/* Try to map a page at the VGA address */
base = mmap((caddr_t)0, 4096, PROT_READ | PROT_WRITE,
MAP_FLAGS, fd, (off_t)0xA0000);
if (base != MAP_FAILED) {
munmap((caddr_t)base, 4096);
devMemFd = fd;
useDevMem = TRUE;
return;
}
else {
if (warn) {
xf86Msg(X_WARNING, "checkDevMem: failed to mmap %s (%s)\n",
DEV_MEM, strerror(errno));
}
}
}
if (warn) {
#ifndef HAS_APERTURE_DRV
xf86Msg(X_WARNING, "checkDevMem: failed to open/mmap %s (%s)\n",
DEV_MEM, strerror(errno));
xf86ErrorF("\tlinear framebuffer access unavailable\n");
#else
#ifndef __OpenBSD__
xf86Msg(X_WARNING, "checkDevMem: failed to open %s and %s\n"
"\t(%s)\n", DEV_APERTURE, DEV_MEM, strerror(errno));
#else /* __OpenBSD__ */
xf86Msg(X_WARNING, "checkDevMem: failed to open %s and %s\n"
"\t(%s)\n%s", DEV_APERTURE, DEV_MEM, strerror(errno),
SYSCTL_MSG);
#endif /* __OpenBSD__ */
xf86ErrorF("\tlinear framebuffer access unavailable\n");
}
useDevMem = FALSE;
return;
#endif
}
void
xf86OSInitVidMem(VidMemInfoPtr pVidMem)
{
checkDevMem(TRUE);
pci_system_init_dev_mem(devMemFd);
pVidMem->initialised = TRUE;
}
#ifdef USE_I386_IOPL
/***************************************************************************/
/* I/O Permissions section */
/***************************************************************************/
static Bool ExtendedEnabled = FALSE;
Bool
xf86EnableIO()
{
if (ExtendedEnabled)
return TRUE;
if (i386_iopl(TRUE) < 0) {
#ifndef __OpenBSD__
xf86Msg(X_WARNING, "%s: Failed to set IOPL for extended I/O",
"xf86EnableIO");
#else
xf86Msg(X_WARNING, "%s: Failed to set IOPL for extended I/O\n%s",
"xf86EnableIO", SYSCTL_MSG);
#endif
return FALSE;
}
ExtendedEnabled = TRUE;
return TRUE;
}
void
xf86DisableIO()
{
if (!ExtendedEnabled)
return;
if (i386_iopl(FALSE) == 0) {
ExtendedEnabled = FALSE;
}
/* Otherwise, the X server has revoqued its root uid,
and thus cannot give up IO privileges any more */
return;
}
#endif /* USE_I386_IOPL */
#ifdef USE_AMD64_IOPL
/***************************************************************************/
/* I/O Permissions section */
/***************************************************************************/
static Bool ExtendedEnabled = FALSE;
Bool
xf86EnableIO()
{
if (ExtendedEnabled)
return TRUE;
if (amd64_iopl(TRUE) < 0) {
#ifndef __OpenBSD__
xf86Msg(X_WARNING, "%s: Failed to set IOPL for extended I/O",
"xf86EnableIO");
#else
xf86Msg(X_WARNING, "%s: Failed to set IOPL for extended I/O\n%s",
"xf86EnableIO", SYSCTL_MSG);
#endif
return FALSE;
}
ExtendedEnabled = TRUE;
return TRUE;
}
void
xf86DisableIO()
{
if (!ExtendedEnabled)
return;
if (amd64_iopl(FALSE) == 0) {
ExtendedEnabled = FALSE;
}
/* Otherwise, the X server has revoqued its root uid,
and thus cannot give up IO privileges any more */
return;
}
#endif /* USE_AMD64_IOPL */
#ifdef USE_DEV_IO
static int IoFd = -1;
Bool
xf86EnableIO()
{
if (IoFd >= 0)
return TRUE;
if ((IoFd = open("/dev/io", O_RDWR)) == -1) {
xf86Msg(X_WARNING, "xf86EnableIO: "
"Failed to open /dev/io for extended I/O");
return FALSE;
}
return TRUE;
}
void
xf86DisableIO()
{
if (IoFd < 0)
return;
close(IoFd);
IoFd = -1;
return;
}
#endif
#ifdef __NetBSD__
/***************************************************************************/
/* Set TV output mode */
/***************************************************************************/
void
xf86SetTVOut(int mode)
{
switch (xf86Info.consType) {
#ifdef PCCONS_SUPPORT
case PCCONS:{
if (ioctl (xf86Info.consoleFd, CONSOLE_X_TV_ON, &mode) < 0) {
xf86Msg(X_WARNING,
"xf86SetTVOut: Could not set console to TV output, %s\n",
strerror(errno));
}
}
break;
#endif /* PCCONS_SUPPORT */
default:
FatalError("Xf86SetTVOut: Unsupported console");
break;
}
return;
}
void
xf86SetRGBOut()
{
switch (xf86Info.consType) {
#ifdef PCCONS_SUPPORT
case PCCONS:{
if (ioctl (xf86Info.consoleFd, CONSOLE_X_TV_OFF, 0) < 0) {
xf86Msg(X_WARNING,
"xf86SetTVOut: Could not set console to RGB output, %s\n",
strerror(errno));
}
}
break;
#endif /* PCCONS_SUPPORT */
default:
FatalError("Xf86SetTVOut: Unsupported console");
break;
}
return;
}
#endif
#ifdef X_PRIVSEP
#include <pciaccess.h>
/*
* Do all things that need root privileges early
* and revoke those privileges
*/
_X_EXPORT void
xf86PrivilegedInit(void)
{
checkDevMem(TRUE);
pci_system_init();
pci_legacy_open_io(NULL, 0, 64*1024);
ExtendedEnabled = TRUE; /* Will die with xf86EnableIO() */
xf86OpenConsole();
}
#endif
|
