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 */
   9 static 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 */
  37 static 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  */
  78 static 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
 106 static 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
 113 static struct kunit_suite pm_qos_test_module = {
 114         .name = "qos-kunit-test",
 115         .test_cases = pm_qos_test_cases,
 116 };
 117 kunit_test_suites(&pm_qos_test_module);