LXR linux/drivers/gpu/drm/selftests/drm

   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,
  27enum {
  28#include TESTS
  29};
  30#undef selftest
  31
  32#define selftest(n, f) [__idx_##n] = { .name = #n, .func = f },
  33static 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) \
  45module_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
  50static 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
  62static 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
  90static 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}
 110