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}