linux/drivers/base/power/qos-test.c
Alan Maguire c475c77d5b kunit: allow kunit tests to be loaded as a module
As tests are added to kunit, it will become less feasible to execute
all built tests together.  By supporting modular tests we provide
a simple way to do selective execution on a running system; specifying

CONFIG_KUNIT=y
CONFIG_KUNIT_EXAMPLE_TEST=m

...means we can simply "insmod example-test.ko" to run the tests.

To achieve this we need to do the following:

o export the required symbols in kunit
o string-stream tests utilize non-exported symbols so for now we skip
  building them when CONFIG_KUNIT_TEST=m.
o drivers/base/power/qos-test.c contains a few unexported interface
  references, namely freq_qos_read_value() and freq_constraints_init().
  Both of these could be potentially defined as static inline functions
  in include/linux/pm_qos.h, but for now we simply avoid supporting
  module build for that test suite.
o support a new way of declaring test suites.  Because a module cannot
  do multiple late_initcall()s, we provide a kunit_test_suites() macro
  to declare multiple suites within the same module at once.
o some test module names would have been too general ("test-test"
  and "example-test" for kunit tests, "inode-test" for ext4 tests);
  rename these as appropriate ("kunit-test", "kunit-example-test"
  and "ext4-inode-test" respectively).

Also define kunit_test_suite() via kunit_test_suites()
as callers in other trees may need the old definition.

Co-developed-by: Knut Omang <knut.omang@oracle.com>
Signed-off-by: Knut Omang <knut.omang@oracle.com>
Signed-off-by: Alan Maguire <alan.maguire@oracle.com>
Reviewed-by: Brendan Higgins <brendanhiggins@google.com>
Acked-by: Theodore Ts'o <tytso@mit.edu> # for ext4 bits
Acked-by: David Gow <davidgow@google.com> # For list-test
Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
2020-01-09 16:42:29 -07:00

118 lines
3.4 KiB
C

// 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_suites(&pm_qos_test_module);