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
|
/***************************************************************************
Copyright 2013 Intel Corporation. All Rights Reserved.
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, sub license, 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 (including the
next paragraph) 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 NON-INFRINGEMENT.
IN NO EVENT SHALL INTEL, AND/OR ITS SUPPLIERS 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.
**************************************************************************/
#include <assert.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <stdlib.h>
#include <errno.h>
#include <sys/ioctl.h>
#include <pciaccess.h>
#include <xf86.h>
#include <xf86drm.h>
#include <xf86drmMode.h>
#include <xf86_OSproc.h>
#include "intel_driver.h"
struct intel_device {
int fd;
int open_count;
int master_count;
};
static int intel_device_key = -1;
static inline struct intel_device *intel_device(ScrnInfoPtr scrn)
{
if (scrn->entityList == NULL)
return NULL;
return xf86GetEntityPrivate(scrn->entityList[0], intel_device_key)->ptr;
}
static inline void intel_set_device(ScrnInfoPtr scrn, struct intel_device *dev)
{
xf86GetEntityPrivate(scrn->entityList[0], intel_device_key)->ptr = dev;
}
static int __intel_open_device(const struct pci_device *pci, const char *path)
{
int fd;
if (path == NULL) {
char id[20];
int ret;
snprintf(id, sizeof(id),
"pci:%04x:%02x:%02x.%d",
pci->domain, pci->bus, pci->dev, pci->func);
ret = drmCheckModesettingSupported(id);
if (ret) {
if (xf86LoadKernelModule("i915"))
ret = drmCheckModesettingSupported(id);
if (ret)
return FALSE;
/* Be nice to the user and load fbcon too */
(void)xf86LoadKernelModule("fbcon");
}
fd = drmOpen(NULL, id);
} else
fd = open(path, O_RDWR | O_CLOEXEC);
return fd;
}
int intel_open_device(int entity_num,
const struct pci_device *pci,
const char *path)
{
struct intel_device *dev;
int fd;
if (intel_device_key == -1)
intel_device_key = xf86AllocateEntityPrivateIndex();
if (intel_device_key == -1)
return -1;
dev = xf86GetEntityPrivate(entity_num, intel_device_key)->ptr;
if (dev)
return dev->fd;
fd = __intel_open_device(pci, path);
if (fd == -1)
return -1;
dev = malloc(sizeof(*dev));
if (dev == NULL) {
close(fd);
return -1;
}
dev->fd = fd;
dev->open_count = 0;
dev->master_count = 0;
xf86GetEntityPrivate(entity_num, intel_device_key)->ptr = dev;
return fd;
}
int intel_get_device(ScrnInfoPtr scrn)
{
struct intel_device *dev;
int ret;
dev = intel_device(scrn);
assert(dev && dev->fd != -1);
if (dev->open_count++ == 0) {
drmSetVersion sv;
int retry = 2000;
/* Check that what we opened was a master or a
* master-capable FD, by setting the version of the
* interface we'll use to talk to it.
*/
do {
sv.drm_di_major = 1;
sv.drm_di_minor = 1;
sv.drm_dd_major = -1;
sv.drm_dd_minor = -1;
ret = drmIoctl(dev->fd, DRM_IOCTL_SET_VERSION, &sv);
if (ret == 0)
break;
usleep(1000);
} while (--retry);
if (ret != 0) {
xf86DrvMsg(scrn->scrnIndex, X_ERROR,
"[drm] failed to set drm interface version: %s [%d].\n",
strerror(errno), errno);
dev->open_count--;
return -1;
}
}
return dev->fd;
}
int intel_get_master(ScrnInfoPtr scrn)
{
struct intel_device *dev = intel_device(scrn);
int ret;
assert(dev && dev->fd != -1);
ret = 0;
if (dev->master_count++ == 0) {
int retry = 2000;
do {
ret = ioctl(dev->fd, DRM_IOCTL_SET_MASTER);
if (ret == 0)
break;
usleep(1000);
} while (--retry);
}
return ret;
}
int intel_put_master(ScrnInfoPtr scrn)
{
struct intel_device *dev = intel_device(scrn);
int ret;
assert(dev && dev->fd != -1);
ret = 0;
assert(dev->master_count);
if (--dev->master_count == 0) {
assert(ioctl(dev->fd, DRM_IOCTL_SET_MASTER) == 0);
ret = ioctl(dev->fd, DRM_IOCTL_DROP_MASTER);
}
return ret;
}
void __intel_uxa_release_device(ScrnInfoPtr scrn)
{
struct intel_device *dev = intel_device(scrn);
if (dev && dev->open_count == 0) {
intel_set_device(scrn, NULL);
drmClose(dev->fd);
free(dev);
}
}
void intel_put_device(ScrnInfoPtr scrn)
{
struct intel_device *dev = intel_device(scrn);
assert(dev && dev->fd != -1);
assert(dev->open_count);
if (--dev->open_count)
return;
intel_set_device(scrn, NULL);
drmClose(dev->fd);
free(dev);
}
|
