1 /* 2 * SPDX-License-Identifier: MIT 3 * 4 * Copyright © 2018 Intel Corporation 5 */ 6 7 #include <linux/random.h> 8 9 #include "gem/selftests/igt_gem_utils.h" 10 #include "gem/selftests/mock_context.h" 11 #include "gt/intel_gt.h" 12 13 #include "i915_selftest.h" 14 15 #include "igt_flush_test.h" 16 #include "mock_drm.h" 17 18 static int switch_to_context(struct drm_i915_private *i915, 19 struct i915_gem_context *ctx) 20 { 21 struct intel_engine_cs *engine; 22 enum intel_engine_id id; 23 24 for_each_engine(engine, i915, id) { 25 struct i915_request *rq; 26 27 rq = igt_request_alloc(ctx, engine); 28 if (IS_ERR(rq)) 29 return PTR_ERR(rq); 30 31 i915_request_add(rq); 32 } 33 34 return 0; 35 } 36 37 static void trash_stolen(struct drm_i915_private *i915) 38 { 39 struct i915_ggtt *ggtt = &i915->ggtt; 40 const u64 slot = ggtt->error_capture.start; 41 const resource_size_t size = resource_size(&i915->dsm); 42 unsigned long page; 43 u32 prng = 0x12345678; 44 45 for (page = 0; page < size; page += PAGE_SIZE) { 46 const dma_addr_t dma = i915->dsm.start + page; 47 u32 __iomem *s; 48 int x; 49 50 ggtt->vm.insert_page(&ggtt->vm, dma, slot, I915_CACHE_NONE, 0); 51 52 s = io_mapping_map_atomic_wc(&ggtt->iomap, slot); 53 for (x = 0; x < PAGE_SIZE / sizeof(u32); x++) { 54 prng = next_pseudo_random32(prng); 55 iowrite32(prng, &s[x]); 56 } 57 io_mapping_unmap_atomic(s); 58 } 59 60 ggtt->vm.clear_range(&ggtt->vm, slot, PAGE_SIZE); 61 } 62 63 static void simulate_hibernate(struct drm_i915_private *i915) 64 { 65 intel_wakeref_t wakeref; 66 67 wakeref = intel_runtime_pm_get(&i915->runtime_pm); 68 69 /* 70 * As a final sting in the tail, invalidate stolen. Under a real S4, 71 * stolen is lost and needs to be refilled on resume. However, under 72 * CI we merely do S4-device testing (as full S4 is too unreliable 73 * for automated testing across a cluster), so to simulate the effect 74 * of stolen being trashed across S4, we trash it ourselves. 75 */ 76 trash_stolen(i915); 77 78 intel_runtime_pm_put(&i915->runtime_pm, wakeref); 79 } 80 81 static int pm_prepare(struct drm_i915_private *i915) 82 { 83 i915_gem_suspend(i915); 84 85 return 0; 86 } 87 88 static void pm_suspend(struct drm_i915_private *i915) 89 { 90 intel_wakeref_t wakeref; 91 92 with_intel_runtime_pm(&i915->runtime_pm, wakeref) { 93 i915_gem_suspend_gtt_mappings(i915); 94 i915_gem_suspend_late(i915); 95 } 96 } 97 98 static void pm_hibernate(struct drm_i915_private *i915) 99 { 100 intel_wakeref_t wakeref; 101 102 with_intel_runtime_pm(&i915->runtime_pm, wakeref) { 103 i915_gem_suspend_gtt_mappings(i915); 104 105 i915_gem_freeze(i915); 106 i915_gem_freeze_late(i915); 107 } 108 } 109 110 static void pm_resume(struct drm_i915_private *i915) 111 { 112 intel_wakeref_t wakeref; 113 114 /* 115 * Both suspend and hibernate follow the same wakeup path and assume 116 * that runtime-pm just works. 117 */ 118 with_intel_runtime_pm(&i915->runtime_pm, wakeref) { 119 intel_gt_sanitize(&i915->gt, false); 120 i915_gem_sanitize(i915); 121 122 i915_gem_restore_gtt_mappings(i915); 123 i915_gem_restore_fences(i915); 124 125 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 ctx = live_context(i915, file); 142 if (!IS_ERR(ctx)) 143 err = switch_to_context(i915, ctx); 144 if (err) 145 goto out; 146 147 err = pm_prepare(i915); 148 if (err) 149 goto out; 150 151 pm_suspend(i915); 152 153 /* Here be dragons! Note that with S3RST any S3 may become S4! */ 154 simulate_hibernate(i915); 155 156 pm_resume(i915); 157 158 err = switch_to_context(i915, ctx); 159 out: 160 mock_file_free(i915, file); 161 return err; 162 } 163 164 static int igt_gem_hibernate(void *arg) 165 { 166 struct drm_i915_private *i915 = arg; 167 struct i915_gem_context *ctx; 168 struct drm_file *file; 169 int err; 170 171 file = mock_file(i915); 172 if (IS_ERR(file)) 173 return PTR_ERR(file); 174 175 err = -ENOMEM; 176 ctx = live_context(i915, file); 177 if (!IS_ERR(ctx)) 178 err = switch_to_context(i915, ctx); 179 if (err) 180 goto out; 181 182 err = pm_prepare(i915); 183 if (err) 184 goto out; 185 186 pm_hibernate(i915); 187 188 /* Here be dragons! */ 189 simulate_hibernate(i915); 190 191 pm_resume(i915); 192 193 err = switch_to_context(i915, ctx); 194 out: 195 mock_file_free(i915, file); 196 return err; 197 } 198 199 int i915_gem_live_selftests(struct drm_i915_private *i915) 200 { 201 static const struct i915_subtest tests[] = { 202 SUBTEST(igt_gem_suspend), 203 SUBTEST(igt_gem_hibernate), 204 }; 205 206 if (intel_gt_is_wedged(&i915->gt)) 207 return 0; 208 209 return i915_live_subtests(tests, i915); 210 } 211