linux/drivers/gpu/drm/i915/selftests/igt_live_test.c

/*
 * SPDX-License-Identifier: MIT
 *
 * Copyright © 2018 Intel Corporation
 */

#include "i915_drv.h"
#include "gt/intel_gt.h"
#include "gt/intel_gt_print.h"

#include "../i915_selftest.h"
#include "igt_flush_test.h"
#include "igt_live_test.h"

int igt_live_test_begin(struct igt_live_test *t,
			struct drm_i915_private *i915,
			const char *func,
			const char *name)
{
	struct intel_engine_cs *engine;
	enum intel_engine_id id;
	struct intel_gt *gt;
	unsigned int i;
	int err;

	t->i915 = i915;
	t->func = func;
	t->name = name;

	for_each_gt(gt, i915, i) {

		err = intel_gt_wait_for_idle(gt, MAX_SCHEDULE_TIMEOUT);
		if (err) {
			gt_err(gt, "%s(%s): GT failed to idle before, with err=%d!",
			       func, name, err);
			return err;
		}

		for_each_engine(engine, gt, id)
			t->reset_engine[i][id] =
				i915_reset_engine_count(&i915->gpu_error,
							engine);
	}

	t->reset_global = i915_reset_count(&i915->gpu_error);

	return 0;
}

int igt_live_test_end(struct igt_live_test *t)
{
	struct drm_i915_private *i915 = t->i915;
	struct intel_engine_cs *engine;
	enum intel_engine_id id;
	struct intel_gt *gt;
	unsigned int i;

	if (igt_flush_test(i915))
		return -EIO;

	if (t->reset_global != i915_reset_count(&i915->gpu_error)) {
		pr_err("%s(%s): GPU was reset %d times!\n",
		       t->func, t->name,
		       i915_reset_count(&i915->gpu_error) - t->reset_global);
		return -EIO;
	}

	for_each_gt(gt, i915, i) {
		for_each_engine(engine, gt, id) {
			if (t->reset_engine[i][id] ==
			    i915_reset_engine_count(&i915->gpu_error, engine))
				continue;

			gt_err(gt, "%s(%s): engine '%s' was reset %d times!\n",
			       t->func, t->name, engine->name,
			       i915_reset_engine_count(&i915->gpu_error, engine) -
			       t->reset_engine[i][id]);
			return -EIO;
		}
	}

	return 0;
}