1 // SPDX-License-Identifier: MIT 2 /* 3 * Copyright © 2021 Intel Corporation 4 */ 5 6 //#include "gt/intel_engine_user.h" 7 #include "gt/intel_gt.h" 8 #include "i915_drv.h" 9 #include "i915_selftest.h" 10 11 #include "selftests/intel_scheduler_helpers.h" 12 13 #define REDUCED_TIMESLICE 5 14 #define REDUCED_PREEMPT 10 15 #define WAIT_FOR_RESET_TIME 10000 16 17 struct intel_engine_cs *intel_selftest_find_any_engine(struct intel_gt *gt) 18 { 19 struct intel_engine_cs *engine; 20 enum intel_engine_id id; 21 22 for_each_engine(engine, gt, id) 23 return engine; 24 25 pr_err("No valid engine found!\n"); 26 return NULL; 27 } 28 29 int intel_selftest_modify_policy(struct intel_engine_cs *engine, 30 struct intel_selftest_saved_policy *saved, 31 u32 modify_type) 32 33 { 34 int err; 35 36 saved->reset = engine->i915->params.reset; 37 saved->flags = engine->flags; 38 saved->timeslice = engine->props.timeslice_duration_ms; 39 saved->preempt_timeout = engine->props.preempt_timeout_ms; 40 41 switch (modify_type) { 42 case SELFTEST_SCHEDULER_MODIFY_FAST_RESET: 43 /* 44 * Enable force pre-emption on time slice expiration 45 * together with engine reset on pre-emption timeout. 46 * This is required to make the GuC notice and reset 47 * the single hanging context. 48 * Also, reduce the preemption timeout to something 49 * small to speed the test up. 50 */ 51 engine->i915->params.reset = 2; 52 engine->flags |= I915_ENGINE_WANT_FORCED_PREEMPTION; 53 engine->props.timeslice_duration_ms = REDUCED_TIMESLICE; 54 engine->props.preempt_timeout_ms = REDUCED_PREEMPT; 55 break; 56 57 case SELFTEST_SCHEDULER_MODIFY_NO_HANGCHECK: 58 engine->props.preempt_timeout_ms = 0; 59 break; 60 61 default: 62 pr_err("Invalid scheduler policy modification type: %d!\n", modify_type); 63 return -EINVAL; 64 } 65 66 if (!intel_engine_uses_guc(engine)) 67 return 0; 68 69 err = intel_guc_global_policies_update(&engine->gt->uc.guc); 70 if (err) 71 intel_selftest_restore_policy(engine, saved); 72 73 return err; 74 } 75 76 int intel_selftest_restore_policy(struct intel_engine_cs *engine, 77 struct intel_selftest_saved_policy *saved) 78 { 79 /* Restore the original policies */ 80 engine->i915->params.reset = saved->reset; 81 engine->flags = saved->flags; 82 engine->props.timeslice_duration_ms = saved->timeslice; 83 engine->props.preempt_timeout_ms = saved->preempt_timeout; 84 85 if (!intel_engine_uses_guc(engine)) 86 return 0; 87 88 return intel_guc_global_policies_update(&engine->gt->uc.guc); 89 } 90 91 int intel_selftest_wait_for_rq(struct i915_request *rq) 92 { 93 long ret; 94 95 ret = i915_request_wait(rq, 0, WAIT_FOR_RESET_TIME); 96 if (ret < 0) 97 return ret; 98 99 return 0; 100 } 101