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