1 // SPDX-License-Identifier: MIT 2 /* 3 * Copyright �� 2021 Intel Corporation 4 */ 5 6 #include "gt/intel_gt_print.h" 7 #include "intel_guc_print.h" 8 #include "selftests/igt_spinner.h" 9 #include "selftests/intel_scheduler_helpers.h" 10 11 static int request_add_spin(struct i915_request *rq, struct igt_spinner *spin) 12 { 13 int err = 0; 14 15 i915_request_get(rq); 16 i915_request_add(rq); 17 if (spin && !igt_wait_for_spinner(spin, rq)) 18 err = -ETIMEDOUT; 19 20 return err; 21 } 22 23 static struct i915_request *nop_user_request(struct intel_context *ce, 24 struct i915_request *from) 25 { 26 struct i915_request *rq; 27 int ret; 28 29 rq = intel_context_create_request(ce); 30 if (IS_ERR(rq)) 31 return rq; 32 33 if (from) { 34 ret = i915_sw_fence_await_dma_fence(&rq->submit, 35 &from->fence, 0, 36 I915_FENCE_GFP); 37 if (ret < 0) { 38 i915_request_put(rq); 39 return ERR_PTR(ret); 40 } 41 } 42 43 i915_request_get(rq); 44 i915_request_add(rq); 45 46 return rq; 47 } 48 49 static int intel_guc_scrub_ctbs(void *arg) 50 { 51 struct intel_gt *gt = arg; 52 int ret = 0; 53 int i; 54 struct i915_request *last[3] = {NULL, NULL, NULL}, *rq; 55 intel_wakeref_t wakeref; 56 struct intel_engine_cs *engine; 57 struct intel_context *ce; 58 59 if (!intel_has_gpu_reset(gt)) 60 return 0; 61 62 wakeref = intel_runtime_pm_get(gt->uncore->rpm); 63 engine = intel_selftest_find_any_engine(gt); 64 65 /* Submit requests and inject errors forcing G2H to be dropped */ 66 for (i = 0; i < 3; ++i) { 67 ce = intel_context_create(engine); 68 if (IS_ERR(ce)) { 69 ret = PTR_ERR(ce); 70 gt_err(gt, "Failed to create context %d: %pe\n", i, ce); 71 goto err; 72 } 73 74 switch (i) { 75 case 0: 76 ce->drop_schedule_enable = true; 77 break; 78 case 1: 79 ce->drop_schedule_disable = true; 80 break; 81 case 2: 82 ce->drop_deregister = true; 83 break; 84 } 85 86 rq = nop_user_request(ce, NULL); 87 intel_context_put(ce); 88 89 if (IS_ERR(rq)) { 90 ret = PTR_ERR(rq); 91 gt_err(gt, "Failed to create request %d: %pe\n", i, rq); 92 goto err; 93 } 94 95 last[i] = rq; 96 } 97 98 for (i = 0; i < 3; ++i) { 99 ret = i915_request_wait(last[i], 0, HZ); 100 if (ret < 0) { 101 gt_err(gt, "Last request failed to complete: %pe\n", ERR_PTR(ret)); 102 goto err; 103 } 104 i915_request_put(last[i]); 105 last[i] = NULL; 106 } 107 108 /* Force all H2G / G2H to be submitted / processed */ 109 intel_gt_retire_requests(gt); 110 msleep(500); 111 112 /* Scrub missing G2H */ 113 intel_gt_handle_error(engine->gt, -1, 0, "selftest reset"); 114 115 /* GT will not idle if G2H are lost */ 116 ret = intel_gt_wait_for_idle(gt, HZ); 117 if (ret < 0) { 118 gt_err(gt, "GT failed to idle: %pe\n", ERR_PTR(ret)); 119 goto err; 120 } 121 122 err: 123 for (i = 0; i < 3; ++i) 124 if (last[i]) 125 i915_request_put(last[i]); 126 intel_runtime_pm_put(gt->uncore->rpm, wakeref); 127 128 return ret; 129 } 130 131 /* 132 * intel_guc_steal_guc_ids - Test to exhaust all guc_ids and then steal one 133 * 134 * This test creates a spinner which is used to block all subsequent submissions 135 * until it completes. Next, a loop creates a context and a NOP request each 136 * iteration until the guc_ids are exhausted (request creation returns -EAGAIN). 137 * The spinner is ended, unblocking all requests created in the loop. At this 138 * point all guc_ids are exhausted but are available to steal. Try to create 139 * another request which should successfully steal a guc_id. Wait on last 140 * request to complete, idle GPU, verify a guc_id was stolen via a counter, and 141 * exit the test. Test also artificially reduces the number of guc_ids so the 142 * test runs in a timely manner. 143 */ 144 static int intel_guc_steal_guc_ids(void *arg) 145 { 146 struct intel_gt *gt = arg; 147 struct intel_guc *guc = >->uc.guc; 148 int ret, sv, context_index = 0; 149 intel_wakeref_t wakeref; 150 struct intel_engine_cs *engine; 151 struct intel_context **ce; 152 struct igt_spinner spin; 153 struct i915_request *spin_rq = NULL, *rq, *last = NULL; 154 int number_guc_id_stolen = guc->number_guc_id_stolen; 155 156 ce = kcalloc(GUC_MAX_CONTEXT_ID, sizeof(*ce), GFP_KERNEL); 157 if (!ce) { 158 guc_err(guc, "Context array allocation failed\n"); 159 return -ENOMEM; 160 } 161 162 wakeref = intel_runtime_pm_get(gt->uncore->rpm); 163 engine = intel_selftest_find_any_engine(gt); 164 sv = guc->submission_state.num_guc_ids; 165 guc->submission_state.num_guc_ids = 512; 166 167 /* Create spinner to block requests in below loop */ 168 ce[context_index] = intel_context_create(engine); 169 if (IS_ERR(ce[context_index])) { 170 ret = PTR_ERR(ce[context_index]); 171 guc_err(guc, "Failed to create context: %pe\n", ce[context_index]); 172 ce[context_index] = NULL; 173 goto err_wakeref; 174 } 175 ret = igt_spinner_init(&spin, engine->gt); 176 if (ret) { 177 guc_err(guc, "Failed to create spinner: %pe\n", ERR_PTR(ret)); 178 goto err_contexts; 179 } 180 spin_rq = igt_spinner_create_request(&spin, ce[context_index], 181 MI_ARB_CHECK); 182 if (IS_ERR(spin_rq)) { 183 ret = PTR_ERR(spin_rq); 184 guc_err(guc, "Failed to create spinner request: %pe\n", spin_rq); 185 goto err_contexts; 186 } 187 ret = request_add_spin(spin_rq, &spin); 188 if (ret) { 189 guc_err(guc, "Failed to add Spinner request: %pe\n", ERR_PTR(ret)); 190 goto err_spin_rq; 191 } 192 193 /* Use all guc_ids */ 194 while (ret != -EAGAIN) { 195 ce[++context_index] = intel_context_create(engine); 196 if (IS_ERR(ce[context_index])) { 197 ret = PTR_ERR(ce[context_index]); 198 guc_err(guc, "Failed to create context: %pe\n", ce[context_index]); 199 ce[context_index--] = NULL; 200 goto err_spin_rq; 201 } 202 203 rq = nop_user_request(ce[context_index], spin_rq); 204 if (IS_ERR(rq)) { 205 ret = PTR_ERR(rq); 206 rq = NULL; 207 if ((ret != -EAGAIN) || !last) { 208 guc_err(guc, "Failed to create %srequest %d: %pe\n", 209 last ? "" : "first ", context_index, ERR_PTR(ret)); 210 goto err_spin_rq; 211 } 212 } else { 213 if (last) 214 i915_request_put(last); 215 last = rq; 216 } 217 } 218 219 /* Release blocked requests */ 220 igt_spinner_end(&spin); 221 ret = intel_selftest_wait_for_rq(spin_rq); 222 if (ret) { 223 guc_err(guc, "Spin request failed to complete: %pe\n", ERR_PTR(ret)); 224 i915_request_put(last); 225 goto err_spin_rq; 226 } 227 i915_request_put(spin_rq); 228 igt_spinner_fini(&spin); 229 spin_rq = NULL; 230 231 /* Wait for last request */ 232 ret = i915_request_wait(last, 0, HZ * 30); 233 i915_request_put(last); 234 if (ret < 0) { 235 guc_err(guc, "Last request failed to complete: %pe\n", ERR_PTR(ret)); 236 goto err_spin_rq; 237 } 238 239 /* Try to steal guc_id */ 240 rq = nop_user_request(ce[context_index], NULL); 241 if (IS_ERR(rq)) { 242 ret = PTR_ERR(rq); 243 guc_err(guc, "Failed to steal guc_id %d: %pe\n", context_index, rq); 244 goto err_spin_rq; 245 } 246 247 /* Wait for request with stolen guc_id */ 248 ret = i915_request_wait(rq, 0, HZ); 249 i915_request_put(rq); 250 if (ret < 0) { 251 guc_err(guc, "Request with stolen guc_id failed to complete: %pe\n", ERR_PTR(ret)); 252 goto err_spin_rq; 253 } 254 255 /* Wait for idle */ 256 ret = intel_gt_wait_for_idle(gt, HZ * 30); 257 if (ret < 0) { 258 guc_err(guc, "GT failed to idle: %pe\n", ERR_PTR(ret)); 259 goto err_spin_rq; 260 } 261 262 /* Verify a guc_id was stolen */ 263 if (guc->number_guc_id_stolen == number_guc_id_stolen) { 264 guc_err(guc, "No guc_id was stolen"); 265 ret = -EINVAL; 266 } else { 267 ret = 0; 268 } 269 270 err_spin_rq: 271 if (spin_rq) { 272 igt_spinner_end(&spin); 273 intel_selftest_wait_for_rq(spin_rq); 274 i915_request_put(spin_rq); 275 igt_spinner_fini(&spin); 276 intel_gt_wait_for_idle(gt, HZ * 30); 277 } 278 err_contexts: 279 for (; context_index >= 0 && ce[context_index]; --context_index) 280 intel_context_put(ce[context_index]); 281 err_wakeref: 282 intel_runtime_pm_put(gt->uncore->rpm, wakeref); 283 kfree(ce); 284 guc->submission_state.num_guc_ids = sv; 285 286 return ret; 287 } 288 289 int intel_guc_live_selftests(struct drm_i915_private *i915) 290 { 291 static const struct i915_subtest tests[] = { 292 SUBTEST(intel_guc_scrub_ctbs), 293 SUBTEST(intel_guc_steal_guc_ids), 294 }; 295 struct intel_gt *gt = to_gt(i915); 296 297 if (intel_gt_is_wedged(gt)) 298 return 0; 299 300 if (!intel_uc_uses_guc_submission(>->uc)) 301 return 0; 302 303 return intel_gt_live_subtests(tests, gt); 304 } 305