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3f51b7e1 CW |
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; | |
19 | int err = 0; | |
20 | ||
21 | intel_runtime_pm_get(i915); | |
22 | ||
23 | for_each_engine(engine, i915, id) { | |
24 | struct i915_request *rq; | |
25 | ||
26 | rq = i915_request_alloc(engine, ctx); | |
27 | if (IS_ERR(rq)) { | |
28 | err = PTR_ERR(rq); | |
29 | break; | |
30 | } | |
31 | ||
32 | i915_request_add(rq); | |
33 | } | |
34 | ||
35 | intel_runtime_pm_put(i915); | |
36 | ||
37 | return err; | |
38 | } | |
39 | ||
40 | static void trash_stolen(struct drm_i915_private *i915) | |
41 | { | |
42 | struct i915_ggtt *ggtt = &i915->ggtt; | |
43 | const u64 slot = ggtt->error_capture.start; | |
44 | const resource_size_t size = resource_size(&i915->dsm); | |
45 | unsigned long page; | |
46 | u32 prng = 0x12345678; | |
47 | ||
48 | for (page = 0; page < size; page += PAGE_SIZE) { | |
49 | const dma_addr_t dma = i915->dsm.start + page; | |
50 | u32 __iomem *s; | |
51 | int x; | |
52 | ||
53 | ggtt->vm.insert_page(&ggtt->vm, dma, slot, I915_CACHE_NONE, 0); | |
54 | ||
55 | s = io_mapping_map_atomic_wc(&ggtt->iomap, slot); | |
56 | for (x = 0; x < PAGE_SIZE / sizeof(u32); x++) { | |
57 | prng = next_pseudo_random32(prng); | |
58 | iowrite32(prng, &s[x]); | |
59 | } | |
60 | io_mapping_unmap_atomic(s); | |
61 | } | |
62 | ||
63 | ggtt->vm.clear_range(&ggtt->vm, slot, PAGE_SIZE); | |
64 | } | |
65 | ||
66 | static void simulate_hibernate(struct drm_i915_private *i915) | |
67 | { | |
68 | intel_runtime_pm_get(i915); | |
69 | ||
70 | /* | |
71 | * As a final sting in the tail, invalidate stolen. Under a real S4, | |
72 | * stolen is lost and needs to be refilled on resume. However, under | |
73 | * CI we merely do S4-device testing (as full S4 is too unreliable | |
74 | * for automated testing across a cluster), so to simulate the effect | |
75 | * of stolen being trashed across S4, we trash it ourselves. | |
76 | */ | |
77 | trash_stolen(i915); | |
78 | ||
79 | intel_runtime_pm_put(i915); | |
80 | } | |
81 | ||
82 | static int pm_prepare(struct drm_i915_private *i915) | |
83 | { | |
84 | int err = 0; | |
85 | ||
86 | if (i915_gem_suspend(i915)) { | |
87 | pr_err("i915_gem_suspend failed\n"); | |
88 | err = -EINVAL; | |
89 | } | |
90 | ||
91 | return err; | |
92 | } | |
93 | ||
94 | static void pm_suspend(struct drm_i915_private *i915) | |
95 | { | |
96 | intel_runtime_pm_get(i915); | |
97 | ||
98 | i915_gem_suspend_gtt_mappings(i915); | |
99 | i915_gem_suspend_late(i915); | |
100 | ||
101 | intel_runtime_pm_put(i915); | |
102 | } | |
103 | ||
104 | static void pm_hibernate(struct drm_i915_private *i915) | |
105 | { | |
106 | intel_runtime_pm_get(i915); | |
107 | ||
108 | i915_gem_suspend_gtt_mappings(i915); | |
109 | ||
110 | i915_gem_freeze(i915); | |
111 | i915_gem_freeze_late(i915); | |
112 | ||
113 | intel_runtime_pm_put(i915); | |
114 | } | |
115 | ||
116 | static void pm_resume(struct drm_i915_private *i915) | |
117 | { | |
118 | /* | |
119 | * Both suspend and hibernate follow the same wakeup path and assume | |
120 | * that runtime-pm just works. | |
121 | */ | |
122 | intel_runtime_pm_get(i915); | |
123 | ||
124 | intel_engines_sanitize(i915); | |
125 | i915_gem_sanitize(i915); | |
126 | i915_gem_resume(i915); | |
127 | ||
128 | intel_runtime_pm_put(i915); | |
129 | } | |
130 | ||
131 | static int igt_gem_suspend(void *arg) | |
132 | { | |
133 | struct drm_i915_private *i915 = arg; | |
134 | struct i915_gem_context *ctx; | |
135 | struct drm_file *file; | |
136 | int err; | |
137 | ||
138 | file = mock_file(i915); | |
139 | if (IS_ERR(file)) | |
140 | return PTR_ERR(file); | |
141 | ||
142 | err = -ENOMEM; | |
143 | mutex_lock(&i915->drm.struct_mutex); | |
144 | ctx = live_context(i915, file); | |
145 | if (!IS_ERR(ctx)) | |
146 | err = switch_to_context(i915, ctx); | |
147 | mutex_unlock(&i915->drm.struct_mutex); | |
148 | if (err) | |
149 | goto out; | |
150 | ||
151 | err = pm_prepare(i915); | |
152 | if (err) | |
153 | goto out; | |
154 | ||
155 | pm_suspend(i915); | |
156 | ||
157 | /* Here be dragons! Note that with S3RST any S3 may become S4! */ | |
158 | simulate_hibernate(i915); | |
159 | ||
160 | pm_resume(i915); | |
161 | ||
162 | mutex_lock(&i915->drm.struct_mutex); | |
163 | err = switch_to_context(i915, ctx); | |
164 | if (igt_flush_test(i915, I915_WAIT_LOCKED)) | |
165 | err = -EIO; | |
166 | mutex_unlock(&i915->drm.struct_mutex); | |
167 | out: | |
168 | mock_file_free(i915, file); | |
169 | return err; | |
170 | } | |
171 | ||
172 | static int igt_gem_hibernate(void *arg) | |
173 | { | |
174 | struct drm_i915_private *i915 = arg; | |
175 | struct i915_gem_context *ctx; | |
176 | struct drm_file *file; | |
177 | int err; | |
178 | ||
179 | file = mock_file(i915); | |
180 | if (IS_ERR(file)) | |
181 | return PTR_ERR(file); | |
182 | ||
183 | err = -ENOMEM; | |
184 | mutex_lock(&i915->drm.struct_mutex); | |
185 | ctx = live_context(i915, file); | |
186 | if (!IS_ERR(ctx)) | |
187 | err = switch_to_context(i915, ctx); | |
188 | mutex_unlock(&i915->drm.struct_mutex); | |
189 | if (err) | |
190 | goto out; | |
191 | ||
192 | err = pm_prepare(i915); | |
193 | if (err) | |
194 | goto out; | |
195 | ||
196 | pm_hibernate(i915); | |
197 | ||
198 | /* Here be dragons! */ | |
199 | simulate_hibernate(i915); | |
200 | ||
201 | pm_resume(i915); | |
202 | ||
203 | mutex_lock(&i915->drm.struct_mutex); | |
204 | err = switch_to_context(i915, ctx); | |
205 | if (igt_flush_test(i915, I915_WAIT_LOCKED)) | |
206 | err = -EIO; | |
207 | mutex_unlock(&i915->drm.struct_mutex); | |
208 | out: | |
209 | mock_file_free(i915, file); | |
210 | return err; | |
211 | } | |
212 | ||
213 | int i915_gem_live_selftests(struct drm_i915_private *i915) | |
214 | { | |
215 | static const struct i915_subtest tests[] = { | |
216 | SUBTEST(igt_gem_suspend), | |
217 | SUBTEST(igt_gem_hibernate), | |
218 | }; | |
219 | ||
220 | return i915_subtests(tests, i915); | |
221 | } |