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 } 222