1 /* $NetBSD: drm_selftest.c,v 1.2 2021/12/18 23:45:44 riastradh Exp $ */
2
3 /*
4 * Copyright © 2016 Intel Corporation
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice (including the next
14 * paragraph) shall be included in all copies or substantial portions of the
15 * Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
22 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
23 * IN THE SOFTWARE.
24 */
25
26 #include <sys/cdefs.h>
27 __KERNEL_RCSID(0, "$NetBSD: drm_selftest.c,v 1.2 2021/12/18 23:45:44 riastradh Exp $");
28
29 #include <linux/compiler.h>
30
31 #define selftest(name, func) __idx_##name,
32 enum {
33 #include TESTS
34 };
35 #undef selftest
36
37 #define selftest(n, f) [__idx_##n] = { .name = #n, .func = f },
38 static struct drm_selftest {
39 bool enabled;
40 const char *name;
41 int (*func)(void *);
42 } selftests[] = {
43 #include TESTS
44 };
45 #undef selftest
46
47 /* Embed the line number into the parameter name so that we can order tests */
48 #define param(n) __PASTE(igt__, __PASTE(__PASTE(__LINE__, __), n))
49 #define selftest_0(n, func, id) \
50 module_param_named(id, selftests[__idx_##n].enabled, bool, 0400);
51 #define selftest(n, func) selftest_0(n, func, param(n))
52 #include TESTS
53 #undef selftest
54
set_default_test_all(struct drm_selftest * st,unsigned long count)55 static void set_default_test_all(struct drm_selftest *st, unsigned long count)
56 {
57 unsigned long i;
58
59 for (i = 0; i < count; i++)
60 if (st[i].enabled)
61 return;
62
63 for (i = 0; i < count; i++)
64 st[i].enabled = true;
65 }
66
run_selftests(struct drm_selftest * st,unsigned long count,void * data)67 static int run_selftests(struct drm_selftest *st,
68 unsigned long count,
69 void *data)
70 {
71 int err = 0;
72
73 set_default_test_all(st, count);
74
75 /* Tests are listed in natural order in drm_*_selftests.h */
76 for (; count--; st++) {
77 if (!st->enabled)
78 continue;
79
80 pr_debug("drm: Running %s\n", st->name);
81 err = st->func(data);
82 if (err)
83 break;
84 }
85
86 if (WARN(err > 0 || err == -ENOTTY,
87 "%s returned %d, conflicting with selftest's magic values!\n",
88 st->name, err))
89 err = -1;
90
91 rcu_barrier();
92 return err;
93 }
94
95 static int __maybe_unused
__drm_subtests(const char * caller,const struct drm_subtest * st,int count,void * data)96 __drm_subtests(const char *caller,
97 const struct drm_subtest *st,
98 int count,
99 void *data)
100 {
101 int err;
102
103 for (; count--; st++) {
104 pr_debug("Running %s/%s\n", caller, st->name);
105 err = st->func(data);
106 if (err) {
107 pr_err("%s: %s failed with error %d\n",
108 caller, st->name, err);
109 return err;
110 }
111 }
112
113 return 0;
114 }
115