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 "igt_gem_utils.h" 12 #include "igt_flush_test.h" 13 #include "mock_context.h" 14 15 static int switch_to_context(struct drm_i915_private *i915, 16 struct i915_gem_context *ctx) 17 { 18 struct intel_engine_cs *engine; 19 enum intel_engine_id id; 20 21 for_each_engine(engine, i915, id) { 22 struct i915_request *rq; 23 24 rq = igt_request_alloc(ctx, engine); 25 if (IS_ERR(rq)) 26 return PTR_ERR(rq); 27 28 i915_request_add(rq); 29 } 30 31 return 0; 32 } 33 34 static void trash_stolen(struct drm_i915_private *i915) 35 { 36 struct i915_ggtt *ggtt = &i915->ggtt; 37 const u64 slot = ggtt->error_capture.start; 38 const resource_size_t size = resource_size(&i915->dsm); 39 unsigned long page; 40 u32 prng = 0x12345678; 41 42 for (page = 0; page < size; page += PAGE_SIZE) { 43 const dma_addr_t dma = i915->dsm.start + page; 44 u32 __iomem *s; 45 int x; 46 47 ggtt->vm.insert_page(&ggtt->vm, dma, slot, I915_CACHE_NONE, 0); 48 49 s = io_mapping_map_atomic_wc(&ggtt->iomap, slot); 50 for (x = 0; x < PAGE_SIZE / sizeof(u32); x++) { 51 prng = next_pseudo_random32(prng); 52 iowrite32(prng, &s[x]); 53 } 54 io_mapping_unmap_atomic(s); 55 } 56 57 ggtt->vm.clear_range(&ggtt->vm, slot, PAGE_SIZE); 58 } 59 60 static void simulate_hibernate(struct drm_i915_private *i915) 61 { 62 intel_wakeref_t wakeref; 63 64 wakeref = intel_runtime_pm_get(i915); 65 66 /* 67 * As a final sting in the tail, invalidate stolen. Under a real S4, 68 * stolen is lost and needs to be refilled on resume. However, under 69 * CI we merely do S4-device testing (as full S4 is too unreliable 70 * for automated testing across a cluster), so to simulate the effect 71 * of stolen being trashed across S4, we trash it ourselves. 72 */ 73 trash_stolen(i915); 74 75 intel_runtime_pm_put(i915, wakeref); 76 } 77 78 static int pm_prepare(struct drm_i915_private *i915) 79 { 80 i915_gem_suspend(i915); 81 82 return 0; 83 } 84 85 static void pm_suspend(struct drm_i915_private *i915) 86 { 87 intel_wakeref_t wakeref; 88 89 with_intel_runtime_pm(i915, wakeref) { 90 i915_gem_suspend_gtt_mappings(i915); 91 i915_gem_suspend_late(i915); 92 } 93 } 94 95 static void pm_hibernate(struct drm_i915_private *i915) 96 { 97 intel_wakeref_t wakeref; 98 99 with_intel_runtime_pm(i915, wakeref) { 100 i915_gem_suspend_gtt_mappings(i915); 101 102 i915_gem_freeze(i915); 103 i915_gem_freeze_late(i915); 104 } 105 } 106 107 static void pm_resume(struct drm_i915_private *i915) 108 { 109 intel_wakeref_t wakeref; 110 111 /* 112 * Both suspend and hibernate follow the same wakeup path and assume 113 * that runtime-pm just works. 114 */ 115 with_intel_runtime_pm(i915, wakeref) { 116 intel_gt_sanitize(i915, false); 117 i915_gem_sanitize(i915); 118 i915_gem_resume(i915); 119 } 120 } 121 122 static int igt_gem_suspend(void *arg) 123 { 124 struct drm_i915_private *i915 = arg; 125 struct i915_gem_context *ctx; 126 struct drm_file *file; 127 int err; 128 129 file = mock_file(i915); 130 if (IS_ERR(file)) 131 return PTR_ERR(file); 132 133 err = -ENOMEM; 134 mutex_lock(&i915->drm.struct_mutex); 135 ctx = live_context(i915, file); 136 if (!IS_ERR(ctx)) 137 err = switch_to_context(i915, ctx); 138 mutex_unlock(&i915->drm.struct_mutex); 139 if (err) 140 goto out; 141 142 err = pm_prepare(i915); 143 if (err) 144 goto out; 145 146 pm_suspend(i915); 147 148 /* Here be dragons! Note that with S3RST any S3 may become S4! */ 149 simulate_hibernate(i915); 150 151 pm_resume(i915); 152 153 mutex_lock(&i915->drm.struct_mutex); 154 err = switch_to_context(i915, ctx); 155 if (igt_flush_test(i915, I915_WAIT_LOCKED)) 156 err = -EIO; 157 mutex_unlock(&i915->drm.struct_mutex); 158 out: 159 mock_file_free(i915, file); 160 return err; 161 } 162 163 static int igt_gem_hibernate(void *arg) 164 { 165 struct drm_i915_private *i915 = arg; 166 struct i915_gem_context *ctx; 167 struct drm_file *file; 168 int err; 169 170 file = mock_file(i915); 171 if (IS_ERR(file)) 172 return PTR_ERR(file); 173 174 err = -ENOMEM; 175 mutex_lock(&i915->drm.struct_mutex); 176 ctx = live_context(i915, file); 177 if (!IS_ERR(ctx)) 178 err = switch_to_context(i915, ctx); 179 mutex_unlock(&i915->drm.struct_mutex); 180 if (err) 181 goto out; 182 183 err = pm_prepare(i915); 184 if (err) 185 goto out; 186 187 pm_hibernate(i915); 188 189 /* Here be dragons! */ 190 simulate_hibernate(i915); 191 192 pm_resume(i915); 193 194 mutex_lock(&i915->drm.struct_mutex); 195 err = switch_to_context(i915, ctx); 196 if (igt_flush_test(i915, I915_WAIT_LOCKED)) 197 err = -EIO; 198 mutex_unlock(&i915->drm.struct_mutex); 199 out: 200 mock_file_free(i915, file); 201 return err; 202 } 203 204 int i915_gem_live_selftests(struct drm_i915_private *i915) 205 { 206 static const struct i915_subtest tests[] = { 207 SUBTEST(igt_gem_suspend), 208 SUBTEST(igt_gem_hibernate), 209 }; 210 211 if (i915_terminally_wedged(i915)) 212 return 0; 213 214 return i915_subtests(tests, i915); 215 } 216