// SPDX-License-Identifier: MIT /* * Copyright © 2021 Intel Corporation */ //#include "gt/intel_engine_user.h" #include "gt/intel_gt.h" #include "i915_drv.h" #include "i915_selftest.h" #include "selftests/intel_scheduler_helpers.h" #define REDUCED_TIMESLICE 5 #define REDUCED_PREEMPT 10 #define WAIT_FOR_RESET_TIME 10000 int intel_selftest_modify_policy(struct intel_engine_cs *engine, struct intel_selftest_saved_policy *saved, u32 modify_type) { int err; saved->reset = engine->i915->params.reset; saved->flags = engine->flags; saved->timeslice = engine->props.timeslice_duration_ms; saved->preempt_timeout = engine->props.preempt_timeout_ms; switch (modify_type) { case SELFTEST_SCHEDULER_MODIFY_FAST_RESET: /* * Enable force pre-emption on time slice expiration * together with engine reset on pre-emption timeout. * This is required to make the GuC notice and reset * the single hanging context. * Also, reduce the preemption timeout to something * small to speed the test up. */ engine->i915->params.reset = 2; engine->flags |= I915_ENGINE_WANT_FORCED_PREEMPTION; engine->props.timeslice_duration_ms = REDUCED_TIMESLICE; engine->props.preempt_timeout_ms = REDUCED_PREEMPT; break; case SELFTEST_SCHEDULER_MODIFY_NO_HANGCHECK: engine->props.preempt_timeout_ms = 0; break; default: pr_err("Invalid scheduler policy modification type: %d!\n", modify_type); return -EINVAL; } if (!intel_engine_uses_guc(engine)) return 0; err = intel_guc_global_policies_update(&engine->gt->uc.guc); if (err) intel_selftest_restore_policy(engine, saved); return err; } int intel_selftest_restore_policy(struct intel_engine_cs *engine, struct intel_selftest_saved_policy *saved) { /* Restore the original policies */ engine->i915->params.reset = saved->reset; engine->flags = saved->flags; engine->props.timeslice_duration_ms = saved->timeslice; engine->props.preempt_timeout_ms = saved->preempt_timeout; if (!intel_engine_uses_guc(engine)) return 0; return intel_guc_global_policies_update(&engine->gt->uc.guc); } int intel_selftest_wait_for_rq(struct i915_request *rq) { long ret; ret = i915_request_wait(rq, 0, WAIT_FOR_RESET_TIME); if (ret < 0) return ret; return 0; }