drivers/gpu/drm/selftests/drm_selftest.c

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