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
|
/*
* Copyright © 2007,2014,2020 Intel Corporation
*
* 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, sublicense,
* 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 NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS 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 <dirent.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include "i915/gem.h"
#include "igt.h"
#include "igt_debugfs.h"
#include "igt_sysfs.h"
static void __restore_defaults(int engine)
{
struct dirent *de;
int defaults;
DIR *dir;
defaults = openat(engine, ".defaults", O_RDONLY);
if (defaults < 0)
return;
dir = fdopendir(defaults);
if (!dir) {
close(defaults);
return;
}
while ((de = readdir(dir))) {
char buf[256];
int fd, len;
if (*de->d_name == '.')
continue;
fd = openat(defaults, de->d_name, O_RDONLY);
if (fd < 0)
continue;
len = read(fd, buf, sizeof(buf));
close(fd);
if (len < 0)
continue;
fd = openat(engine, de->d_name, O_WRONLY);
if (fd < 0)
continue;
write(fd, buf, len);
close(fd);
}
closedir(dir);
}
static void restore_defaults(int i915)
{
struct dirent *de;
int engines;
DIR *dir;
int sys;
sys = igt_sysfs_open(i915);
if (sys < 0)
return;
engines = openat(sys, "engine", O_RDONLY);
if (engines < 0)
goto close_sys;
dir = fdopendir(engines);
if (!dir) {
close(engines);
goto close_sys;
}
while ((de = readdir(dir))) {
int engine;
if (*de->d_name == '.')
continue;
engine = openat(engines, de->d_name, O_RDONLY);
if (engine < 0)
continue;
__restore_defaults(engine);
close(engine);
}
closedir(dir);
close_sys:
close(sys);
}
static void reset_device(int i915)
{
int dir;
dir = igt_debugfs_dir(i915);
igt_require(dir >= 0);
if (ioctl(i915, DRM_IOCTL_I915_GEM_THROTTLE)) {
igt_info("Found wedged device, trying to reset and continue\n");
igt_sysfs_printf(dir, "i915_wedged", "%llu", -1ull);
}
close(dir);
}
static void restore_params(int i915)
{
/* Re-enable modparams if left clobbered */
igt_params_set(i915, "reset", "%u", -1);
igt_params_set(i915, "enable_hangcheck", "%u", 1);
}
void igt_require_gem(int i915)
{
int err;
igt_require_i915(i915);
/*
* We only want to use the throttle-ioctl for its -EIO reporting
* of a wedged device, not for actually waiting on outstanding
* requests! So create a new drm_file for the device that is clean.
*/
i915 = drm_reopen_driver(i915);
/*
* Reset the global seqno at the start of each test. This ensures that
* the test will not wrap unless it explicitly sets up seqno wrapping
* itself, which avoids accidentally hanging when setting up long
* sequences of batches.
*/
reset_device(i915);
restore_params(i915);
restore_defaults(i915);
err = 0;
if (ioctl(i915, DRM_IOCTL_I915_GEM_THROTTLE)) {
err = -errno;
igt_assume(err);
}
close(i915);
igt_require_f(err == 0, "Unresponsive i915/GEM device\n");
}
/**
* gem_quiescent_gpu:
* @i915: open i915 drm file descriptor
*
* Ensure the gpu is idle by launching a nop execbuf and stalling for it. This
* is automatically run when opening a drm device node and is also installed as
* an exit handler to have the best assurance that the test is run in a pristine
* and controlled environment.
*
* This function simply allows tests to make additional calls in-between, if so
* desired.
*/
void gem_quiescent_gpu(int i915)
{
igt_terminate_spins();
igt_drop_caches_set(i915,
DROP_ACTIVE | DROP_RETIRE | DROP_IDLE | DROP_FREED);
}
|
