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1// SPDX-License-Identifier: MIT2/*3 * Copyright © 2021 Intel Corporation4 */5 6#include <linux/jiffies.h>7 8//#include "gt/intel_engine_user.h"9#include "gt/intel_gt.h"10#include "i915_drv.h"11#include "i915_selftest.h"12 13#include "selftests/intel_scheduler_helpers.h"14 15#define REDUCED_TIMESLICE 516#define REDUCED_PREEMPT 1017#define WAIT_FOR_RESET_TIME_MS 1000018 19struct intel_engine_cs *intel_selftest_find_any_engine(struct intel_gt *gt)20{21 struct intel_engine_cs *engine;22 enum intel_engine_id id;23 24 for_each_engine(engine, gt, id)25 return engine;26 27 pr_err("No valid engine found!\n");28 return NULL;29}30 31int intel_selftest_modify_policy(struct intel_engine_cs *engine,32 struct intel_selftest_saved_policy *saved,33 enum selftest_scheduler_modify modify_type)34{35 int err;36 37 saved->reset = engine->i915->params.reset;38 saved->flags = engine->flags;39 saved->timeslice = engine->props.timeslice_duration_ms;40 saved->preempt_timeout = engine->props.preempt_timeout_ms;41 42 switch (modify_type) {43 case SELFTEST_SCHEDULER_MODIFY_FAST_RESET:44 /*45 * Enable force pre-emption on time slice expiration46 * together with engine reset on pre-emption timeout.47 * This is required to make the GuC notice and reset48 * the single hanging context.49 * Also, reduce the preemption timeout to something50 * small to speed the test up.51 */52 engine->i915->params.reset = 2;53 engine->flags |= I915_ENGINE_WANT_FORCED_PREEMPTION;54 engine->props.timeslice_duration_ms = REDUCED_TIMESLICE;55 engine->props.preempt_timeout_ms = REDUCED_PREEMPT;56 break;57 58 case SELFTEST_SCHEDULER_MODIFY_NO_HANGCHECK:59 engine->props.preempt_timeout_ms = 0;60 break;61 62 default:63 pr_err("Invalid scheduler policy modification type: %d!\n", modify_type);64 return -EINVAL;65 }66 67 if (!intel_engine_uses_guc(engine))68 return 0;69 70 err = intel_guc_global_policies_update(&engine->gt->uc.guc);71 if (err)72 intel_selftest_restore_policy(engine, saved);73 74 return err;75}76 77int intel_selftest_restore_policy(struct intel_engine_cs *engine,78 struct intel_selftest_saved_policy *saved)79{80 /* Restore the original policies */81 engine->i915->params.reset = saved->reset;82 engine->flags = saved->flags;83 engine->props.timeslice_duration_ms = saved->timeslice;84 engine->props.preempt_timeout_ms = saved->preempt_timeout;85 86 if (!intel_engine_uses_guc(engine))87 return 0;88 89 return intel_guc_global_policies_update(&engine->gt->uc.guc);90}91 92int intel_selftest_wait_for_rq(struct i915_request *rq)93{94 long ret;95 96 ret = i915_request_wait(rq, 0, msecs_to_jiffies(WAIT_FOR_RESET_TIME_MS));97 if (ret < 0)98 return ret;99 100 return 0;101}102