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1 | /* |
2 | * SPDX-License-Identifier: MIT | |
3 | * | |
4 | * Copyright © 2018 Intel Corporation | |
5 | */ | |
6 | ||
7 | #include <linux/random.h> | |
8 | ||
9 | #include "../i915_selftest.h" | |
10 | ||
11 | #include "mock_context.h" | |
12 | #include "igt_flush_test.h" | |
13 | ||
14 | static int switch_to_context(struct drm_i915_private *i915, | |
15 | struct i915_gem_context *ctx) | |
16 | { | |
17 | struct intel_engine_cs *engine; | |
18 | enum intel_engine_id id; | |
c9d08cc3 | 19 | intel_wakeref_t wakeref; |
3f51b7e1 CW |
20 | int err = 0; |
21 | ||
c9d08cc3 | 22 | wakeref = intel_runtime_pm_get(i915); |
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23 | |
24 | for_each_engine(engine, i915, id) { | |
25 | struct i915_request *rq; | |
26 | ||
27 | rq = i915_request_alloc(engine, ctx); | |
28 | if (IS_ERR(rq)) { | |
29 | err = PTR_ERR(rq); | |
30 | break; | |
31 | } | |
32 | ||
33 | i915_request_add(rq); | |
34 | } | |
35 | ||
c9d08cc3 | 36 | intel_runtime_pm_put(i915, wakeref); |
3f51b7e1 CW |
37 | |
38 | return err; | |
39 | } | |
40 | ||
41 | static void trash_stolen(struct drm_i915_private *i915) | |
42 | { | |
43 | struct i915_ggtt *ggtt = &i915->ggtt; | |
44 | const u64 slot = ggtt->error_capture.start; | |
45 | const resource_size_t size = resource_size(&i915->dsm); | |
46 | unsigned long page; | |
47 | u32 prng = 0x12345678; | |
48 | ||
49 | for (page = 0; page < size; page += PAGE_SIZE) { | |
50 | const dma_addr_t dma = i915->dsm.start + page; | |
51 | u32 __iomem *s; | |
52 | int x; | |
53 | ||
54 | ggtt->vm.insert_page(&ggtt->vm, dma, slot, I915_CACHE_NONE, 0); | |
55 | ||
56 | s = io_mapping_map_atomic_wc(&ggtt->iomap, slot); | |
57 | for (x = 0; x < PAGE_SIZE / sizeof(u32); x++) { | |
58 | prng = next_pseudo_random32(prng); | |
59 | iowrite32(prng, &s[x]); | |
60 | } | |
61 | io_mapping_unmap_atomic(s); | |
62 | } | |
63 | ||
64 | ggtt->vm.clear_range(&ggtt->vm, slot, PAGE_SIZE); | |
65 | } | |
66 | ||
67 | static void simulate_hibernate(struct drm_i915_private *i915) | |
68 | { | |
c9d08cc3 CW |
69 | intel_wakeref_t wakeref; |
70 | ||
71 | wakeref = intel_runtime_pm_get(i915); | |
3f51b7e1 CW |
72 | |
73 | /* | |
74 | * As a final sting in the tail, invalidate stolen. Under a real S4, | |
75 | * stolen is lost and needs to be refilled on resume. However, under | |
76 | * CI we merely do S4-device testing (as full S4 is too unreliable | |
77 | * for automated testing across a cluster), so to simulate the effect | |
78 | * of stolen being trashed across S4, we trash it ourselves. | |
79 | */ | |
80 | trash_stolen(i915); | |
81 | ||
c9d08cc3 | 82 | intel_runtime_pm_put(i915, wakeref); |
3f51b7e1 CW |
83 | } |
84 | ||
85 | static int pm_prepare(struct drm_i915_private *i915) | |
86 | { | |
5861b013 | 87 | i915_gem_suspend(i915); |
3f51b7e1 | 88 | |
5861b013 | 89 | return 0; |
3f51b7e1 CW |
90 | } |
91 | ||
92 | static void pm_suspend(struct drm_i915_private *i915) | |
93 | { | |
c9d08cc3 CW |
94 | intel_wakeref_t wakeref; |
95 | ||
d4225a53 CW |
96 | with_intel_runtime_pm(i915, wakeref) { |
97 | i915_gem_suspend_gtt_mappings(i915); | |
98 | i915_gem_suspend_late(i915); | |
99 | } | |
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100 | } |
101 | ||
102 | static void pm_hibernate(struct drm_i915_private *i915) | |
103 | { | |
c9d08cc3 CW |
104 | intel_wakeref_t wakeref; |
105 | ||
d4225a53 CW |
106 | with_intel_runtime_pm(i915, wakeref) { |
107 | i915_gem_suspend_gtt_mappings(i915); | |
3f51b7e1 | 108 | |
d4225a53 CW |
109 | i915_gem_freeze(i915); |
110 | i915_gem_freeze_late(i915); | |
111 | } | |
3f51b7e1 CW |
112 | } |
113 | ||
114 | static void pm_resume(struct drm_i915_private *i915) | |
115 | { | |
c9d08cc3 CW |
116 | intel_wakeref_t wakeref; |
117 | ||
3f51b7e1 CW |
118 | /* |
119 | * Both suspend and hibernate follow the same wakeup path and assume | |
120 | * that runtime-pm just works. | |
121 | */ | |
d4225a53 CW |
122 | with_intel_runtime_pm(i915, wakeref) { |
123 | intel_engines_sanitize(i915, false); | |
124 | i915_gem_sanitize(i915); | |
125 | i915_gem_resume(i915); | |
126 | } | |
3f51b7e1 CW |
127 | } |
128 | ||
129 | static int igt_gem_suspend(void *arg) | |
130 | { | |
131 | struct drm_i915_private *i915 = arg; | |
132 | struct i915_gem_context *ctx; | |
133 | struct drm_file *file; | |
134 | int err; | |
135 | ||
136 | file = mock_file(i915); | |
137 | if (IS_ERR(file)) | |
138 | return PTR_ERR(file); | |
139 | ||
140 | err = -ENOMEM; | |
141 | mutex_lock(&i915->drm.struct_mutex); | |
142 | ctx = live_context(i915, file); | |
143 | if (!IS_ERR(ctx)) | |
144 | err = switch_to_context(i915, ctx); | |
145 | mutex_unlock(&i915->drm.struct_mutex); | |
146 | if (err) | |
147 | goto out; | |
148 | ||
149 | err = pm_prepare(i915); | |
150 | if (err) | |
151 | goto out; | |
152 | ||
153 | pm_suspend(i915); | |
154 | ||
155 | /* Here be dragons! Note that with S3RST any S3 may become S4! */ | |
156 | simulate_hibernate(i915); | |
157 | ||
158 | pm_resume(i915); | |
159 | ||
160 | mutex_lock(&i915->drm.struct_mutex); | |
161 | err = switch_to_context(i915, ctx); | |
162 | if (igt_flush_test(i915, I915_WAIT_LOCKED)) | |
163 | err = -EIO; | |
164 | mutex_unlock(&i915->drm.struct_mutex); | |
165 | out: | |
166 | mock_file_free(i915, file); | |
167 | return err; | |
168 | } | |
169 | ||
170 | static int igt_gem_hibernate(void *arg) | |
171 | { | |
172 | struct drm_i915_private *i915 = arg; | |
173 | struct i915_gem_context *ctx; | |
174 | struct drm_file *file; | |
175 | int err; | |
176 | ||
177 | file = mock_file(i915); | |
178 | if (IS_ERR(file)) | |
179 | return PTR_ERR(file); | |
180 | ||
181 | err = -ENOMEM; | |
182 | mutex_lock(&i915->drm.struct_mutex); | |
183 | ctx = live_context(i915, file); | |
184 | if (!IS_ERR(ctx)) | |
185 | err = switch_to_context(i915, ctx); | |
186 | mutex_unlock(&i915->drm.struct_mutex); | |
187 | if (err) | |
188 | goto out; | |
189 | ||
190 | err = pm_prepare(i915); | |
191 | if (err) | |
192 | goto out; | |
193 | ||
194 | pm_hibernate(i915); | |
195 | ||
196 | /* Here be dragons! */ | |
197 | simulate_hibernate(i915); | |
198 | ||
199 | pm_resume(i915); | |
200 | ||
201 | mutex_lock(&i915->drm.struct_mutex); | |
202 | err = switch_to_context(i915, ctx); | |
203 | if (igt_flush_test(i915, I915_WAIT_LOCKED)) | |
204 | err = -EIO; | |
205 | mutex_unlock(&i915->drm.struct_mutex); | |
206 | out: | |
207 | mock_file_free(i915, file); | |
208 | return err; | |
209 | } | |
210 | ||
211 | int i915_gem_live_selftests(struct drm_i915_private *i915) | |
212 | { | |
213 | static const struct i915_subtest tests[] = { | |
214 | SUBTEST(igt_gem_suspend), | |
215 | SUBTEST(igt_gem_hibernate), | |
216 | }; | |
217 | ||
218 | return i915_subtests(tests, i915); | |
219 | } |