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
|
/*
* SPDX-License-Identifier: MIT
*
* Copyright © 2018 Intel Corporation
*/
#include <linux/random.h>
#include "gem/selftests/igt_gem_utils.h"
#include "gem/selftests/mock_context.h"
#include "gt/intel_gt.h"
#include "i915_selftest.h"
#include "igt_flush_test.h"
#include "mock_drm.h"
static int switch_to_context(struct drm_i915_private *i915,
struct i915_gem_context *ctx)
{
struct intel_engine_cs *engine;
enum intel_engine_id id;
for_each_engine(engine, i915, id) {
struct i915_request *rq;
rq = igt_request_alloc(ctx, engine);
if (IS_ERR(rq))
return PTR_ERR(rq);
i915_request_add(rq);
}
return 0;
}
static void trash_stolen(struct drm_i915_private *i915)
{
struct i915_ggtt *ggtt = &i915->ggtt;
const u64 slot = ggtt->error_capture.start;
const resource_size_t size = resource_size(&i915->dsm);
unsigned long page;
u32 prng = 0x12345678;
for (page = 0; page < size; page += PAGE_SIZE) {
const dma_addr_t dma = i915->dsm.start + page;
u32 __iomem *s;
int x;
ggtt->vm.insert_page(&ggtt->vm, dma, slot, I915_CACHE_NONE, 0);
s = io_mapping_map_atomic_wc(&ggtt->iomap, slot);
for (x = 0; x < PAGE_SIZE / sizeof(u32); x++) {
prng = next_pseudo_random32(prng);
iowrite32(prng, &s[x]);
}
io_mapping_unmap_atomic(s);
}
ggtt->vm.clear_range(&ggtt->vm, slot, PAGE_SIZE);
}
static void simulate_hibernate(struct drm_i915_private *i915)
{
intel_wakeref_t wakeref;
wakeref = intel_runtime_pm_get(&i915->runtime_pm);
/*
* As a final sting in the tail, invalidate stolen. Under a real S4,
* stolen is lost and needs to be refilled on resume. However, under
* CI we merely do S4-device testing (as full S4 is too unreliable
* for automated testing across a cluster), so to simulate the effect
* of stolen being trashed across S4, we trash it ourselves.
*/
trash_stolen(i915);
intel_runtime_pm_put(&i915->runtime_pm, wakeref);
}
static int pm_prepare(struct drm_i915_private *i915)
{
i915_gem_suspend(i915);
return 0;
}
static void pm_suspend(struct drm_i915_private *i915)
{
intel_wakeref_t wakeref;
with_intel_runtime_pm(&i915->runtime_pm, wakeref) {
i915_gem_suspend_gtt_mappings(i915);
i915_gem_suspend_late(i915);
}
}
static void pm_hibernate(struct drm_i915_private *i915)
{
intel_wakeref_t wakeref;
with_intel_runtime_pm(&i915->runtime_pm, wakeref) {
i915_gem_suspend_gtt_mappings(i915);
i915_gem_freeze(i915);
i915_gem_freeze_late(i915);
}
}
static void pm_resume(struct drm_i915_private *i915)
{
intel_wakeref_t wakeref;
/*
* Both suspend and hibernate follow the same wakeup path and assume
* that runtime-pm just works.
*/
with_intel_runtime_pm(&i915->runtime_pm, wakeref) {
intel_gt_sanitize(&i915->gt, false);
i915_gem_sanitize(i915);
mutex_lock(&i915->drm.struct_mutex);
i915_gem_restore_gtt_mappings(i915);
i915_gem_restore_fences(i915);
mutex_unlock(&i915->drm.struct_mutex);
i915_gem_resume(i915);
}
}
static int igt_gem_suspend(void *arg)
{
struct drm_i915_private *i915 = arg;
struct i915_gem_context *ctx;
struct drm_file *file;
int err;
file = mock_file(i915);
if (IS_ERR(file))
return PTR_ERR(file);
err = -ENOMEM;
mutex_lock(&i915->drm.struct_mutex);
ctx = live_context(i915, file);
if (!IS_ERR(ctx))
err = switch_to_context(i915, ctx);
mutex_unlock(&i915->drm.struct_mutex);
if (err)
goto out;
err = pm_prepare(i915);
if (err)
goto out;
pm_suspend(i915);
/* Here be dragons! Note that with S3RST any S3 may become S4! */
simulate_hibernate(i915);
pm_resume(i915);
mutex_lock(&i915->drm.struct_mutex);
err = switch_to_context(i915, ctx);
mutex_unlock(&i915->drm.struct_mutex);
out:
mock_file_free(i915, file);
return err;
}
static int igt_gem_hibernate(void *arg)
{
struct drm_i915_private *i915 = arg;
struct i915_gem_context *ctx;
struct drm_file *file;
int err;
file = mock_file(i915);
if (IS_ERR(file))
return PTR_ERR(file);
err = -ENOMEM;
mutex_lock(&i915->drm.struct_mutex);
ctx = live_context(i915, file);
if (!IS_ERR(ctx))
err = switch_to_context(i915, ctx);
mutex_unlock(&i915->drm.struct_mutex);
if (err)
goto out;
err = pm_prepare(i915);
if (err)
goto out;
pm_hibernate(i915);
/* Here be dragons! */
simulate_hibernate(i915);
pm_resume(i915);
mutex_lock(&i915->drm.struct_mutex);
err = switch_to_context(i915, ctx);
mutex_unlock(&i915->drm.struct_mutex);
out:
mock_file_free(i915, file);
return err;
}
int i915_gem_live_selftests(struct drm_i915_private *i915)
{
static const struct i915_subtest tests[] = {
SUBTEST(igt_gem_suspend),
SUBTEST(igt_gem_hibernate),
};
if (intel_gt_is_wedged(&i915->gt))
return 0;
return i915_live_subtests(tests, i915);
}
|
