projects/linux·blob master · refs

228 lines · 5.1 KiB

1// SPDX-License-Identifier: MIT
2/*
3 * Copyright 2022 Advanced Micro Devices, Inc.
4 */
5
6#define pr_fmt(fmt) "drm_exec: " fmt
7
8#include <kunit/test.h>
9
10#include <linux/module.h>
11#include <linux/prime_numbers.h>
12
13#include <drm/drm_exec.h>
14#include <drm/drm_device.h>
15#include <drm/drm_drv.h>
16#include <drm/drm_gem.h>
17#include <drm/drm_kunit_helpers.h>
18
19struct drm_exec_priv {
20 struct device *dev;
21 struct drm_device *drm;
22};
23
24static int drm_exec_test_init(struct kunit *test)
25{
26 struct drm_exec_priv *priv;
27
28 priv = kunit_kzalloc(test, sizeof(*priv), GFP_KERNEL);
29 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, priv);
30
31 test->priv = priv;
32
33 priv->dev = drm_kunit_helper_alloc_device(test);
34 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, priv->dev);
35
36 priv->drm = __drm_kunit_helper_alloc_drm_device(test, priv->dev, sizeof(*priv->drm), 0,
37 DRIVER_MODESET);
38 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, priv->drm);
39
40 return 0;
41}
42
43static void sanitycheck(struct kunit *test)
44{
45 struct drm_exec exec;
46
47 drm_exec_init(&exec, DRM_EXEC_INTERRUPTIBLE_WAIT, 0);
48 drm_exec_fini(&exec);
49 KUNIT_SUCCEED(test);
50}
51
52static void test_lock(struct kunit *test)
53{
54 struct drm_exec_priv *priv = test->priv;
55 struct drm_gem_object gobj = { };
56 struct drm_exec exec;
57 int ret;
58
59 drm_gem_private_object_init(priv->drm, &gobj, PAGE_SIZE);
60
61 drm_exec_init(&exec, DRM_EXEC_INTERRUPTIBLE_WAIT, 0);
62 drm_exec_until_all_locked(&exec) {
63 ret = drm_exec_lock_obj(&exec, &gobj);
64 drm_exec_retry_on_contention(&exec);
65 KUNIT_EXPECT_EQ(test, ret, 0);
66 if (ret)
67 break;
68 }
69 drm_exec_fini(&exec);
70}
71
72static void test_lock_unlock(struct kunit *test)
73{
74 struct drm_exec_priv *priv = test->priv;
75 struct drm_gem_object gobj = { };
76 struct drm_exec exec;
77 int ret;
78
79 drm_gem_private_object_init(priv->drm, &gobj, PAGE_SIZE);
80
81 drm_exec_init(&exec, DRM_EXEC_INTERRUPTIBLE_WAIT, 0);
82 drm_exec_until_all_locked(&exec) {
83 ret = drm_exec_lock_obj(&exec, &gobj);
84 drm_exec_retry_on_contention(&exec);
85 KUNIT_EXPECT_EQ(test, ret, 0);
86 if (ret)
87 break;
88
89 drm_exec_unlock_obj(&exec, &gobj);
90 ret = drm_exec_lock_obj(&exec, &gobj);
91 drm_exec_retry_on_contention(&exec);
92 KUNIT_EXPECT_EQ(test, ret, 0);
93 if (ret)
94 break;
95 }
96 drm_exec_fini(&exec);
97}
98
99static void test_duplicates(struct kunit *test)
100{
101 struct drm_exec_priv *priv = test->priv;
102 struct drm_gem_object gobj = { };
103 struct drm_exec exec;
104 int ret;
105
106 drm_gem_private_object_init(priv->drm, &gobj, PAGE_SIZE);
107
108 drm_exec_init(&exec, DRM_EXEC_IGNORE_DUPLICATES, 0);
109 drm_exec_until_all_locked(&exec) {
110 ret = drm_exec_lock_obj(&exec, &gobj);
111 drm_exec_retry_on_contention(&exec);
112 KUNIT_EXPECT_EQ(test, ret, 0);
113 if (ret)
114 break;
115
116 ret = drm_exec_lock_obj(&exec, &gobj);
117 drm_exec_retry_on_contention(&exec);
118 KUNIT_EXPECT_EQ(test, ret, 0);
119 if (ret)
120 break;
121 }
122 drm_exec_unlock_obj(&exec, &gobj);
123 drm_exec_fini(&exec);
124}
125
126static void test_prepare(struct kunit *test)
127{
128 struct drm_exec_priv *priv = test->priv;
129 struct drm_gem_object gobj = { };
130 struct drm_exec exec;
131 int ret;
132
133 drm_gem_private_object_init(priv->drm, &gobj, PAGE_SIZE);
134
135 drm_exec_init(&exec, DRM_EXEC_INTERRUPTIBLE_WAIT, 0);
136 drm_exec_until_all_locked(&exec) {
137 ret = drm_exec_prepare_obj(&exec, &gobj, 1);
138 drm_exec_retry_on_contention(&exec);
139 KUNIT_EXPECT_EQ(test, ret, 0);
140 if (ret)
141 break;
142 }
143 drm_exec_fini(&exec);
144
145 drm_gem_private_object_fini(&gobj);
146}
147
148static void test_prepare_array(struct kunit *test)
149{
150 struct drm_exec_priv *priv = test->priv;
151 struct drm_gem_object *gobj1;
152 struct drm_gem_object *gobj2;
153 struct drm_gem_object *array[] = {
154 (gobj1 = kunit_kzalloc(test, sizeof(*gobj1), GFP_KERNEL)),
155 (gobj2 = kunit_kzalloc(test, sizeof(*gobj2), GFP_KERNEL)),
156 };
157 struct drm_exec exec;
158 int ret;
159
160 if (!gobj1 || !gobj2) {
161 KUNIT_FAIL(test, "Failed to allocate GEM objects.\n");
162 return;
163 }
164
165 drm_gem_private_object_init(priv->drm, gobj1, PAGE_SIZE);
166 drm_gem_private_object_init(priv->drm, gobj2, PAGE_SIZE);
167
168 drm_exec_init(&exec, DRM_EXEC_INTERRUPTIBLE_WAIT, 0);
169 drm_exec_until_all_locked(&exec)
170 ret = drm_exec_prepare_array(&exec, array, ARRAY_SIZE(array),
171 1);
172 KUNIT_EXPECT_EQ(test, ret, 0);
173 drm_exec_fini(&exec);
174
175 drm_gem_private_object_fini(gobj1);
176 drm_gem_private_object_fini(gobj2);
177}
178
179static void test_multiple_loops(struct kunit *test)
180{
181 struct drm_exec exec;
182
183 {
184 __label__ drm_exec_retry;
185
186 drm_exec_init(&exec, DRM_EXEC_INTERRUPTIBLE_WAIT, 0);
187 drm_exec_until_all_locked(&exec)
188 {
189 break;
190 }
191 drm_exec_fini(&exec);
192 }
193
194 {
195 __label__ drm_exec_retry;
196
197 drm_exec_init(&exec, DRM_EXEC_INTERRUPTIBLE_WAIT, 0);
198 drm_exec_until_all_locked(&exec)
199 {
200 break;
201 }
202 drm_exec_fini(&exec);
203 }
204 KUNIT_SUCCEED(test);
205}
206
207static struct kunit_case drm_exec_tests[] = {
208 KUNIT_CASE(sanitycheck),
209 KUNIT_CASE(test_lock),
210 KUNIT_CASE(test_lock_unlock),
211 KUNIT_CASE(test_duplicates),
212 KUNIT_CASE(test_prepare),
213 KUNIT_CASE(test_prepare_array),
214 KUNIT_CASE(test_multiple_loops),
215 {}
216};
217
218static struct kunit_suite drm_exec_test_suite = {
219 .name = "drm_exec",
220 .init = drm_exec_test_init,
221 .test_cases = drm_exec_tests,
222};
223
224kunit_test_suite(drm_exec_test_suite);
225
226MODULE_AUTHOR("AMD");
227MODULE_DESCRIPTION("Kunit test for drm_exec functions");
228MODULE_LICENSE("GPL and additional rights");