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qos-test.c
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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright 2019 NXP
*/
#include <kunit/test.h>
#include <linux/pm_qos.h>
/* Basic test for aggregating two "min" requests */
static void freq_qos_test_min(struct kunit *test)
{
struct freq_constraints qos;
struct freq_qos_request req1, req2;
int ret;
freq_constraints_init(&qos);
memset(&req1, 0, sizeof(req1));
memset(&req2, 0, sizeof(req2));
ret = freq_qos_add_request(&qos, &req1, FREQ_QOS_MIN, 1000);
KUNIT_EXPECT_EQ(test, ret, 1);
ret = freq_qos_add_request(&qos, &req2, FREQ_QOS_MIN, 2000);
KUNIT_EXPECT_EQ(test, ret, 1);
KUNIT_EXPECT_EQ(test, freq_qos_read_value(&qos, FREQ_QOS_MIN), 2000);
ret = freq_qos_remove_request(&req2);
KUNIT_EXPECT_EQ(test, ret, 1);
KUNIT_EXPECT_EQ(test, freq_qos_read_value(&qos, FREQ_QOS_MIN), 1000);
ret = freq_qos_remove_request(&req1);
KUNIT_EXPECT_EQ(test, ret, 1);
KUNIT_EXPECT_EQ(test, freq_qos_read_value(&qos, FREQ_QOS_MIN),
FREQ_QOS_MIN_DEFAULT_VALUE);
}
/* Test that requests for MAX_DEFAULT_VALUE have no effect */
static void freq_qos_test_maxdef(struct kunit *test)
{
struct freq_constraints qos;
struct freq_qos_request req1, req2;
int ret;
freq_constraints_init(&qos);
memset(&req1, 0, sizeof(req1));
memset(&req2, 0, sizeof(req2));
KUNIT_EXPECT_EQ(test, freq_qos_read_value(&qos, FREQ_QOS_MAX),
FREQ_QOS_MAX_DEFAULT_VALUE);
ret = freq_qos_add_request(&qos, &req1, FREQ_QOS_MAX,
FREQ_QOS_MAX_DEFAULT_VALUE);
KUNIT_EXPECT_EQ(test, ret, 0);
ret = freq_qos_add_request(&qos, &req2, FREQ_QOS_MAX,
FREQ_QOS_MAX_DEFAULT_VALUE);
KUNIT_EXPECT_EQ(test, ret, 0);
/* Add max 1000 */
ret = freq_qos_update_request(&req1, 1000);
KUNIT_EXPECT_EQ(test, ret, 1);
KUNIT_EXPECT_EQ(test, freq_qos_read_value(&qos, FREQ_QOS_MAX), 1000);
/* Add max 2000, no impact */
ret = freq_qos_update_request(&req2, 2000);
KUNIT_EXPECT_EQ(test, ret, 0);
KUNIT_EXPECT_EQ(test, freq_qos_read_value(&qos, FREQ_QOS_MAX), 1000);
/* Remove max 1000, new max 2000 */
ret = freq_qos_remove_request(&req1);
KUNIT_EXPECT_EQ(test, ret, 1);
KUNIT_EXPECT_EQ(test, freq_qos_read_value(&qos, FREQ_QOS_MAX), 2000);
}
/*
* Test that a freq_qos_request can be added again after removal
*
* This issue was solved by commit 05ff1ba412fd ("PM: QoS: Invalidate frequency
* QoS requests after removal")
*/
static void freq_qos_test_readd(struct kunit *test)
{
struct freq_constraints qos;
struct freq_qos_request req;
int ret;
freq_constraints_init(&qos);
memset(&req, 0, sizeof(req));
KUNIT_EXPECT_EQ(test, freq_qos_read_value(&qos, FREQ_QOS_MIN),
FREQ_QOS_MIN_DEFAULT_VALUE);
/* Add */
ret = freq_qos_add_request(&qos, &req, FREQ_QOS_MIN, 1000);
KUNIT_EXPECT_EQ(test, ret, 1);
KUNIT_EXPECT_EQ(test, freq_qos_read_value(&qos, FREQ_QOS_MIN), 1000);
/* Remove */
ret = freq_qos_remove_request(&req);
KUNIT_EXPECT_EQ(test, ret, 1);
KUNIT_EXPECT_EQ(test, freq_qos_read_value(&qos, FREQ_QOS_MIN),
FREQ_QOS_MIN_DEFAULT_VALUE);
/* Add again */
ret = freq_qos_add_request(&qos, &req, FREQ_QOS_MIN, 2000);
KUNIT_EXPECT_EQ(test, ret, 1);
KUNIT_EXPECT_EQ(test, freq_qos_read_value(&qos, FREQ_QOS_MIN), 2000);
}
static struct kunit_case pm_qos_test_cases[] = {
KUNIT_CASE(freq_qos_test_min),
KUNIT_CASE(freq_qos_test_maxdef),
KUNIT_CASE(freq_qos_test_readd),
{},
};
static struct kunit_suite pm_qos_test_module = {
.name = "qos-kunit-test",
.test_cases = pm_qos_test_cases,
};
kunit_test_suite(pm_qos_test_module);