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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/drivers/base/power/qos-test.c
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// SPDX-License-Identifier: GPL-2.0

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/*

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 * Copyright 2019 NXP

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 */

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#include <kunit/test.h>

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#include <linux/pm_qos.h>

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/* Basic test for aggregating two "min" requests */

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static void freq_qos_test_min(struct kunit *test)

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{

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	struct freq_constraints	qos;

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	struct freq_qos_request	req1, req2;

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	int ret;

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	freq_constraints_init(&qos);

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	memset(&req1, 0, sizeof(req1));

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	memset(&req2, 0, sizeof(req2));

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	ret = freq_qos_add_request(&qos, &req1, FREQ_QOS_MIN, 1000);

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	KUNIT_EXPECT_EQ(test, ret, 1);

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	ret = freq_qos_add_request(&qos, &req2, FREQ_QOS_MIN, 2000);

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	KUNIT_EXPECT_EQ(test, ret, 1);

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	KUNIT_EXPECT_EQ(test, freq_qos_read_value(&qos, FREQ_QOS_MIN), 2000);

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	ret = freq_qos_remove_request(&req2);

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	KUNIT_EXPECT_EQ(test, ret, 1);

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	KUNIT_EXPECT_EQ(test, freq_qos_read_value(&qos, FREQ_QOS_MIN), 1000);

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	ret = freq_qos_remove_request(&req1);

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	KUNIT_EXPECT_EQ(test, ret, 1);

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	KUNIT_EXPECT_EQ(test, freq_qos_read_value(&qos, FREQ_QOS_MIN),

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			FREQ_QOS_MIN_DEFAULT_VALUE);

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}

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/* Test that requests for MAX_DEFAULT_VALUE have no effect */

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static void freq_qos_test_maxdef(struct kunit *test)

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{

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	struct freq_constraints	qos;

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	struct freq_qos_request	req1, req2;

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	int ret;

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	freq_constraints_init(&qos);

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	memset(&req1, 0, sizeof(req1));

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	memset(&req2, 0, sizeof(req2));

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	KUNIT_EXPECT_EQ(test, freq_qos_read_value(&qos, FREQ_QOS_MAX),

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			FREQ_QOS_MAX_DEFAULT_VALUE);

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	ret = freq_qos_add_request(&qos, &req1, FREQ_QOS_MAX,

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			FREQ_QOS_MAX_DEFAULT_VALUE);

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	KUNIT_EXPECT_EQ(test, ret, 0);

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	ret = freq_qos_add_request(&qos, &req2, FREQ_QOS_MAX,

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			FREQ_QOS_MAX_DEFAULT_VALUE);

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	KUNIT_EXPECT_EQ(test, ret, 0);

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	/* Add max 1000 */

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	ret = freq_qos_update_request(&req1, 1000);

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	KUNIT_EXPECT_EQ(test, ret, 1);

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	KUNIT_EXPECT_EQ(test, freq_qos_read_value(&qos, FREQ_QOS_MAX), 1000);

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	/* Add max 2000, no impact */

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	ret = freq_qos_update_request(&req2, 2000);

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	KUNIT_EXPECT_EQ(test, ret, 0);

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	KUNIT_EXPECT_EQ(test, freq_qos_read_value(&qos, FREQ_QOS_MAX), 1000);

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	/* Remove max 1000, new max 2000 */

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	ret = freq_qos_remove_request(&req1);

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	KUNIT_EXPECT_EQ(test, ret, 1);

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	KUNIT_EXPECT_EQ(test, freq_qos_read_value(&qos, FREQ_QOS_MAX), 2000);

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}

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/*

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 * Test that a freq_qos_request can be added again after removal

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 *

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 * This issue was solved by commit 05ff1ba412fd ("PM: QoS: Invalidate frequency

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 * QoS requests after removal")

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 */

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static void freq_qos_test_readd(struct kunit *test)

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{

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	struct freq_constraints	qos;

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	struct freq_qos_request	req;

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	int ret;

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	freq_constraints_init(&qos);

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	memset(&req, 0, sizeof(req));

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	KUNIT_EXPECT_EQ(test, freq_qos_read_value(&qos, FREQ_QOS_MIN),

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			FREQ_QOS_MIN_DEFAULT_VALUE);

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	/* Add */

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	ret = freq_qos_add_request(&qos, &req, FREQ_QOS_MIN, 1000);

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	KUNIT_EXPECT_EQ(test, ret, 1);

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	KUNIT_EXPECT_EQ(test, freq_qos_read_value(&qos, FREQ_QOS_MIN), 1000);

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	/* Remove */

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	ret = freq_qos_remove_request(&req);

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	KUNIT_EXPECT_EQ(test, ret, 1);

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	KUNIT_EXPECT_EQ(test, freq_qos_read_value(&qos, FREQ_QOS_MIN),

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			FREQ_QOS_MIN_DEFAULT_VALUE);

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	/* Add again */

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	ret = freq_qos_add_request(&qos, &req, FREQ_QOS_MIN, 2000);

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	KUNIT_EXPECT_EQ(test, ret, 1);

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	KUNIT_EXPECT_EQ(test, freq_qos_read_value(&qos, FREQ_QOS_MIN), 2000);

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}

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static struct kunit_case pm_qos_test_cases[] = {

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	KUNIT_CASE(freq_qos_test_min),

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	KUNIT_CASE(freq_qos_test_maxdef),

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	KUNIT_CASE(freq_qos_test_readd),

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	{},

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};

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static struct kunit_suite pm_qos_test_module = {

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	.name = "qos-kunit-test",

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	.test_cases = pm_qos_test_cases,

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};

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kunit_test_suites(&pm_qos_test_module);

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