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 intel_wakeref_t wakeref; 20 int err = 0; 21 22 wakeref = intel_runtime_pm_get(i915); 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 36 intel_runtime_pm_put(i915, wakeref); 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 { 69 intel_wakeref_t wakeref; 70 71 wakeref = intel_runtime_pm_get(i915); 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 82 intel_runtime_pm_put(i915, wakeref); 83 } 84 85 static int pm_prepare(struct drm_i915_private *i915) 86 { 87 i915_gem_suspend(i915); 88 89 return 0; 90 } 91 92 static void pm_suspend(struct drm_i915_private *i915) 93 { 94 intel_wakeref_t wakeref; 95 96 with_intel_runtime_pm(i915, wakeref) { 97 i915_gem_suspend_gtt_mappings(i915); 98 i915_gem_suspend_late(i915); 99 } 100 } 101 102 static void pm_hibernate(struct drm_i915_private *i915) 103 { 104 intel_wakeref_t wakeref; 105 106 with_intel_runtime_pm(i915, wakeref) { 107 i915_gem_suspend_gtt_mappings(i915); 108 109 i915_gem_freeze(i915); 110 i915_gem_freeze_late(i915); 111 } 112 } 113 114 static void pm_resume(struct drm_i915_private *i915) 115 { 116 intel_wakeref_t wakeref; 117 118 /* 119 * Both suspend and hibernate follow the same wakeup path and assume 120 * that runtime-pm just works. 121 */ 122 with_intel_runtime_pm(i915, wakeref) { 123 intel_engines_sanitize(i915, false); 124 i915_gem_sanitize(i915); 125 i915_gem_resume(i915); 126 } 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 if (i915_terminally_wedged(i915)) 219 return 0; 220 221 return i915_subtests(tests, i915); 222 } 223