2 * SPDX-License-Identifier: MIT
4 * Copyright © 2018 Intel Corporation
7 #include <linux/random.h>
9 #include "../i915_selftest.h"
11 #include "mock_context.h"
12 #include "igt_flush_test.h"
14 static int switch_to_context(struct drm_i915_private *i915,
15 struct i915_gem_context *ctx)
17 struct intel_engine_cs *engine;
18 enum intel_engine_id id;
21 intel_runtime_pm_get(i915);
23 for_each_engine(engine, i915, id) {
24 struct i915_request *rq;
26 rq = i915_request_alloc(engine, ctx);
35 intel_runtime_pm_put(i915);
40 static void trash_stolen(struct drm_i915_private *i915)
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);
46 u32 prng = 0x12345678;
48 for (page = 0; page < size; page += PAGE_SIZE) {
49 const dma_addr_t dma = i915->dsm.start + page;
53 ggtt->vm.insert_page(&ggtt->vm, dma, slot, I915_CACHE_NONE, 0);
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]);
60 io_mapping_unmap_atomic(s);
63 ggtt->vm.clear_range(&ggtt->vm, slot, PAGE_SIZE);
66 static void simulate_hibernate(struct drm_i915_private *i915)
68 intel_runtime_pm_get(i915);
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.
79 intel_runtime_pm_put(i915);
82 static int pm_prepare(struct drm_i915_private *i915)
86 if (i915_gem_suspend(i915)) {
87 pr_err("i915_gem_suspend failed\n");
94 static void pm_suspend(struct drm_i915_private *i915)
96 intel_runtime_pm_get(i915);
98 i915_gem_suspend_gtt_mappings(i915);
99 i915_gem_suspend_late(i915);
101 intel_runtime_pm_put(i915);
104 static void pm_hibernate(struct drm_i915_private *i915)
106 intel_runtime_pm_get(i915);
108 i915_gem_suspend_gtt_mappings(i915);
110 i915_gem_freeze(i915);
111 i915_gem_freeze_late(i915);
113 intel_runtime_pm_put(i915);
116 static void pm_resume(struct drm_i915_private *i915)
119 * Both suspend and hibernate follow the same wakeup path and assume
120 * that runtime-pm just works.
122 intel_runtime_pm_get(i915);
124 intel_engines_sanitize(i915);
125 i915_gem_sanitize(i915);
126 i915_gem_resume(i915);
128 intel_runtime_pm_put(i915);
131 static int igt_gem_suspend(void *arg)
133 struct drm_i915_private *i915 = arg;
134 struct i915_gem_context *ctx;
135 struct drm_file *file;
138 file = mock_file(i915);
140 return PTR_ERR(file);
143 mutex_lock(&i915->drm.struct_mutex);
144 ctx = live_context(i915, file);
146 err = switch_to_context(i915, ctx);
147 mutex_unlock(&i915->drm.struct_mutex);
151 err = pm_prepare(i915);
157 /* Here be dragons! Note that with S3RST any S3 may become S4! */
158 simulate_hibernate(i915);
162 mutex_lock(&i915->drm.struct_mutex);
163 err = switch_to_context(i915, ctx);
164 if (igt_flush_test(i915, I915_WAIT_LOCKED))
166 mutex_unlock(&i915->drm.struct_mutex);
168 mock_file_free(i915, file);
172 static int igt_gem_hibernate(void *arg)
174 struct drm_i915_private *i915 = arg;
175 struct i915_gem_context *ctx;
176 struct drm_file *file;
179 file = mock_file(i915);
181 return PTR_ERR(file);
184 mutex_lock(&i915->drm.struct_mutex);
185 ctx = live_context(i915, file);
187 err = switch_to_context(i915, ctx);
188 mutex_unlock(&i915->drm.struct_mutex);
192 err = pm_prepare(i915);
198 /* Here be dragons! */
199 simulate_hibernate(i915);
203 mutex_lock(&i915->drm.struct_mutex);
204 err = switch_to_context(i915, ctx);
205 if (igt_flush_test(i915, I915_WAIT_LOCKED))
207 mutex_unlock(&i915->drm.struct_mutex);
209 mock_file_free(i915, file);
213 int i915_gem_live_selftests(struct drm_i915_private *i915)
215 static const struct i915_subtest tests[] = {
216 SUBTEST(igt_gem_suspend),
217 SUBTEST(igt_gem_hibernate),
220 return i915_subtests(tests, i915);