LXR linux/drivers/base/power/qos-test.c

   1// SPDX-License-Identifier: GPL-2.0
   2/*
   3 * Copyright 2019 NXP
   4 */
   5#include <kunit/test.h>
   6#include <linux/pm_qos.h>
   7
   8/* Basic test for aggregating two "min" requests */
   9static void freq_qos_test_min(struct kunit *test)
  10{
  11        struct freq_constraints qos;
  12        struct freq_qos_request req1, req2;
  13        int ret;
  14
  15        freq_constraints_init(&qos);
  16        memset(&req1, 0, sizeof(req1));
  17        memset(&req2, 0, sizeof(req2));
  18
  19        ret = freq_qos_add_request(&qos, &req1, FREQ_QOS_MIN, 1000);
  20        KUNIT_EXPECT_EQ(test, ret, 1);
  21        ret = freq_qos_add_request(&qos, &req2, FREQ_QOS_MIN, 2000);
  22        KUNIT_EXPECT_EQ(test, ret, 1);
  23
  24        KUNIT_EXPECT_EQ(test, freq_qos_read_value(&qos, FREQ_QOS_MIN), 2000);
  25
  26        ret = freq_qos_remove_request(&req2);
  27        KUNIT_EXPECT_EQ(test, ret, 1);
  28        KUNIT_EXPECT_EQ(test, freq_qos_read_value(&qos, FREQ_QOS_MIN), 1000);
  29
  30        ret = freq_qos_remove_request(&req1);
  31        KUNIT_EXPECT_EQ(test, ret, 1);
  32        KUNIT_EXPECT_EQ(test, freq_qos_read_value(&qos, FREQ_QOS_MIN),
  33                        FREQ_QOS_MIN_DEFAULT_VALUE);
  34}
  35
  36/* Test that requests for MAX_DEFAULT_VALUE have no effect */
  37static void freq_qos_test_maxdef(struct kunit *test)
  38{
  39        struct freq_constraints qos;
  40        struct freq_qos_request req1, req2;
  41        int ret;
  42
  43        freq_constraints_init(&qos);
  44        memset(&req1, 0, sizeof(req1));
  45        memset(&req2, 0, sizeof(req2));
  46        KUNIT_EXPECT_EQ(test, freq_qos_read_value(&qos, FREQ_QOS_MAX),
  47                        FREQ_QOS_MAX_DEFAULT_VALUE);
  48
  49        ret = freq_qos_add_request(&qos, &req1, FREQ_QOS_MAX,
  50                        FREQ_QOS_MAX_DEFAULT_VALUE);
  51        KUNIT_EXPECT_EQ(test, ret, 0);
  52        ret = freq_qos_add_request(&qos, &req2, FREQ_QOS_MAX,
  53                        FREQ_QOS_MAX_DEFAULT_VALUE);
  54        KUNIT_EXPECT_EQ(test, ret, 0);
  55
  56        /* Add max 1000 */
  57        ret = freq_qos_update_request(&req1, 1000);
  58        KUNIT_EXPECT_EQ(test, ret, 1);
  59        KUNIT_EXPECT_EQ(test, freq_qos_read_value(&qos, FREQ_QOS_MAX), 1000);
  60
  61        /* Add max 2000, no impact */
  62        ret = freq_qos_update_request(&req2, 2000);
  63        KUNIT_EXPECT_EQ(test, ret, 0);
  64        KUNIT_EXPECT_EQ(test, freq_qos_read_value(&qos, FREQ_QOS_MAX), 1000);
  65
  66        /* Remove max 1000, new max 2000 */
  67        ret = freq_qos_remove_request(&req1);
  68        KUNIT_EXPECT_EQ(test, ret, 1);
  69        KUNIT_EXPECT_EQ(test, freq_qos_read_value(&qos, FREQ_QOS_MAX), 2000);
  70}
  71
  72/*
  73 * Test that a freq_qos_request can be added again after removal
  74 *
  75 * This issue was solved by commit 05ff1ba412fd ("PM: QoS: Invalidate frequency
  76 * QoS requests after removal")
  77 */
  78static void freq_qos_test_readd(struct kunit *test)
  79{
  80        struct freq_constraints qos;
  81        struct freq_qos_request req;
  82        int ret;
  83
  84        freq_constraints_init(&qos);
  85        memset(&req, 0, sizeof(req));
  86        KUNIT_EXPECT_EQ(test, freq_qos_read_value(&qos, FREQ_QOS_MIN),
  87                        FREQ_QOS_MIN_DEFAULT_VALUE);
  88
  89        /* Add */
  90        ret = freq_qos_add_request(&qos, &req, FREQ_QOS_MIN, 1000);
  91        KUNIT_EXPECT_EQ(test, ret, 1);
  92        KUNIT_EXPECT_EQ(test, freq_qos_read_value(&qos, FREQ_QOS_MIN), 1000);
  93
  94        /* Remove */
  95        ret = freq_qos_remove_request(&req);
  96        KUNIT_EXPECT_EQ(test, ret, 1);
  97        KUNIT_EXPECT_EQ(test, freq_qos_read_value(&qos, FREQ_QOS_MIN),
  98                        FREQ_QOS_MIN_DEFAULT_VALUE);
  99
 100        /* Add again */
 101        ret = freq_qos_add_request(&qos, &req, FREQ_QOS_MIN, 2000);
 102        KUNIT_EXPECT_EQ(test, ret, 1);
 103        KUNIT_EXPECT_EQ(test, freq_qos_read_value(&qos, FREQ_QOS_MIN), 2000);
 104}
 105
 106static struct kunit_case pm_qos_test_cases[] = {
 107        KUNIT_CASE(freq_qos_test_min),
 108        KUNIT_CASE(freq_qos_test_maxdef),
 109        KUNIT_CASE(freq_qos_test_readd),
 110        {},
 111};
 112
 113static struct kunit_suite pm_qos_test_module = {
 114        .name = "qos-kunit-test",
 115        .test_cases = pm_qos_test_cases,
 116};
 117kunit_test_suites(&pm_qos_test_module);
 118