From patchwork Thu Dec 22 08:36:09 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Chris Wilson X-Patchwork-Id: 9484429 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id CE000601D2 for ; Thu, 22 Dec 2016 08:38:32 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id C939F277D9 for ; Thu, 22 Dec 2016 08:38:32 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id BE1EE281C3; Thu, 22 Dec 2016 08:38:32 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.1 required=2.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_MED, T_DKIM_INVALID autolearn=unavailable version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 65379277D9 for ; Thu, 22 Dec 2016 08:38:31 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 8DFAD6F182; Thu, 22 Dec 2016 08:38:15 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mail-wm0-x242.google.com (mail-wm0-x242.google.com [IPv6:2a00:1450:400c:c09::242]) by gabe.freedesktop.org (Postfix) with ESMTPS id 612B46F16E; Thu, 22 Dec 2016 08:36:54 +0000 (UTC) Received: by mail-wm0-x242.google.com with SMTP id m203so34711231wma.3; Thu, 22 Dec 2016 00:36:54 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=sender:from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=8O2D/Z+ALqqmHnHxUiUP7yzMdi5usnb+SBvZX1dveZs=; b=kgAYl52WZLcVw+TsBLa8Zkbz9jcRrk03a0aFnYM4iGoE56fcQxoGi8fuHfT44FVoeI CPiDsWSQIfmXjGRvgs5WZD5w1UHjz2LGQrpGwXkA3QbQdHc3htHRf9jOaAfhJgGVRWsY 6r6CgDriakxgRahLiF/12dheZ/FO/uccxudcIhSGiVl7GtlWPqw/9+BKq5KOeop/ENYt TFkhzvRm7tpLJh0wN0xYjc92FeKjUcQ6vM+c15qyxo8PUnbcxKnvP6zWZ5D+5XEZ4sC4 mr9f5v4NQ26JwDK8jrZJt30TZ+/3XNHeJJTUHkIbdOReVBHbK67nSktlFJQ2Yepe0pzD +arQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:from:to:cc:subject:date:message-id :in-reply-to:references:mime-version:content-transfer-encoding; bh=8O2D/Z+ALqqmHnHxUiUP7yzMdi5usnb+SBvZX1dveZs=; b=hftVhj4iuBFz11p55lsCNLH7y43FVfg0k11sX4B0x2yDGOUmEORSIwm0s1qVKeiexa IoRW7zHFntGu0cbgQ9A2cvLtMR4VEHV0//NQGJSGlnbIrQ7xJPwyfhtuyvJAPy8UH5UK Mh9sxeWQ9wGYdiQa96WLuB75cOtEuXZVRbAU5Tm3P7X1Mt0qHJdmb5sKmVxH4Ip0Yqi1 62/FzU1WF0qAtI9/MvjskWu7AiLDFjjIwuEnIIY1hlQxbLw0ir2xNRaa7OR9EWPR5lWb ZHqopDnYBwie9txY5ASnIsc2HU/y9HxiAgSHhSQN7aqsd7g0h4dLhDwBT1EvgnpYW4Qq 1xDw== X-Gm-Message-State: AIkVDXIwwT3/3LXsqM/XXWqpgq2VKL9aQBEs0N1czBvWA/wEtpynFt8DtZzyfUjdn+39OQ== X-Received: by 10.28.180.214 with SMTP id d205mr10818624wmf.131.1482395812186; Thu, 22 Dec 2016 00:36:52 -0800 (PST) Received: from haswell.alporthouse.com ([78.156.65.138]) by smtp.gmail.com with ESMTPSA id di9sm34442318wjc.37.2016.12.22.00.36.51 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 22 Dec 2016 00:36:51 -0800 (PST) From: Chris Wilson To: dri-devel@lists.freedesktop.org Subject: [PATCH v4 06/38] drm: Add some kselftests for the DRM range manager (struct drm_mm) Date: Thu, 22 Dec 2016 08:36:09 +0000 Message-Id: <20161222083641.2691-7-chris@chris-wilson.co.uk> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20161222083641.2691-1-chris@chris-wilson.co.uk> References: <20161222083641.2691-1-chris@chris-wilson.co.uk> MIME-Version: 1.0 Cc: intel-gfx@lists.freedesktop.org X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Virus-Scanned: ClamAV using ClamSMTP First we introduce a smattering of infrastructure for writing selftests. The idea is that we have a test module that exercises a particular portion of the exported API, and that module provides a set of tests that can either be run as an ensemble via kselftest or individually via an igt harness (in this case igt/drm_mm). To accommodate selecting individual tests, we export a boolean parameter to control selection of each test - that is hidden inside a bunch of reusable boilerplate macros to keep writing the tests simple. v2: Choose a random random_seed unless one is specified by the user. v3: More parameters to control max_iterations and max_prime of the tests. Testcase: igt/drm_mm Signed-off-by: Chris Wilson Acked-by: Christian König Reviewed-by: Joonas Lahtinen --- drivers/gpu/drm/Kconfig | 15 ++++ drivers/gpu/drm/Makefile | 1 + drivers/gpu/drm/selftests/drm_mm_selftests.h | 8 ++ drivers/gpu/drm/selftests/drm_selftest.c | 109 ++++++++++++++++++++++++++ drivers/gpu/drm/selftests/drm_selftest.h | 41 ++++++++++ drivers/gpu/drm/selftests/test-drm_mm.c | 58 ++++++++++++++ tools/testing/selftests/drivers/gpu/drm_mm.sh | 15 ++++ 7 files changed, 247 insertions(+) create mode 100644 drivers/gpu/drm/selftests/drm_mm_selftests.h create mode 100644 drivers/gpu/drm/selftests/drm_selftest.c create mode 100644 drivers/gpu/drm/selftests/drm_selftest.h create mode 100644 drivers/gpu/drm/selftests/test-drm_mm.c create mode 100755 tools/testing/selftests/drivers/gpu/drm_mm.sh diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig index 45a1c7468e88..29146fa83001 100644 --- a/drivers/gpu/drm/Kconfig +++ b/drivers/gpu/drm/Kconfig @@ -48,6 +48,21 @@ config DRM_DEBUG_MM If in doubt, say "N". +config DRM_DEBUG_MM_SELFTEST + tristate "kselftests for DRM range manager (struct drm_mm)" + depends on DRM + depends on DEBUG_KERNEL + select PRIME_NUMBERS + select DRM_LIB_RANDOM + default n + help + This option provides a kernel module that can be used to test + the DRM range manager (drm_mm) and its API. This option is not + useful for distributions or general kernels, but only for kernel + developers working on DRM and associated drivers. + + If in doubt, say "N". + config DRM_KMS_HELPER tristate depends on DRM diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile index 6bb416360ae4..c0d1aed8588b 100644 --- a/drivers/gpu/drm/Makefile +++ b/drivers/gpu/drm/Makefile @@ -38,6 +38,7 @@ drm_kms_helper-$(CONFIG_DRM_KMS_CMA_HELPER) += drm_fb_cma_helper.o drm_kms_helper-$(CONFIG_DRM_DP_AUX_CHARDEV) += drm_dp_aux_dev.o obj-$(CONFIG_DRM_KMS_HELPER) += drm_kms_helper.o +obj-$(CONFIG_DRM_DEBUG_MM_SELFTEST) += selftests/test-drm_mm.o CFLAGS_drm_trace_points.o := -I$(src) diff --git a/drivers/gpu/drm/selftests/drm_mm_selftests.h b/drivers/gpu/drm/selftests/drm_mm_selftests.h new file mode 100644 index 000000000000..1610e0a63a5b --- /dev/null +++ b/drivers/gpu/drm/selftests/drm_mm_selftests.h @@ -0,0 +1,8 @@ +/* List each unit test as selftest(name, function) + * + * The name is used as both an enum and expanded as igt__name to create + * a module parameter. It must be unique and legal for a C identifier. + * + * Tests are executed in order by igt/drm_mm + */ +selftest(sanitycheck, igt_sanitycheck) /* keep first (selfcheck for igt) */ diff --git a/drivers/gpu/drm/selftests/drm_selftest.c b/drivers/gpu/drm/selftests/drm_selftest.c new file mode 100644 index 000000000000..e29ed9faef5b --- /dev/null +++ b/drivers/gpu/drm/selftests/drm_selftest.c @@ -0,0 +1,109 @@ +/* + * Copyright © 2016 Intel Corporation + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice (including the next + * paragraph) shall be included in all copies or substantial portions of the + * Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS + * IN THE SOFTWARE. + */ + +#include + +#define selftest(name, func) __idx_##name, +enum { +#include TESTS +}; +#undef selftest + +#define selftest(n, f) [__idx_##n] = { .name = #n, .func = f }, +static struct drm_selftest { + bool enabled; + const char *name; + int (*func)(void *); +} selftests[] = { +#include TESTS +}; +#undef selftest + +/* Embed the line number into the parameter name so that we can order tests */ +#define param(n) __PASTE(igt__, __PASTE(__PASTE(__LINE__, __), n)) +#define selftest_0(n, func, id) \ +module_param_named(id, selftests[__idx_##n].enabled, bool, 0400); +#define selftest(n, func) selftest_0(n, func, param(n)) +#include TESTS +#undef selftest + +static void set_default_test_all(struct drm_selftest *st, unsigned long count) +{ + unsigned long i; + + for (i = 0; i < count; i++) + if (st[i].enabled) + return; + + for (i = 0; i < count; i++) + st[i].enabled = true; +} + +static int run_selftests(struct drm_selftest *st, + unsigned long count, + void *data) +{ + int err = 0; + + set_default_test_all(st, count); + + /* Tests are listed in natural order in drm_*_selftests.h */ + for (; count--; st++) { + if (!st->enabled) + continue; + + pr_debug("drm: Running %s\n", st->name); + err = st->func(data); + if (err) + break; + } + + if (WARN(err > 0 || err == -ENOTTY, + "%s returned %d, conflicting with selftest's magic values!\n", + st->name, err)) + err = -1; + + rcu_barrier(); + return err; +} + +static int __maybe_unused +__drm_subtests(const char *caller, + const struct drm_subtest *st, + int count, + void *data) +{ + int err; + + for (; count--; st++) { + pr_debug("Running %s/%s\n", caller, st->name); + err = st->func(data); + if (err) { + pr_err("%s: %s failed with error %d\n", + caller, st->name, err); + return err; + } + } + + return 0; +} diff --git a/drivers/gpu/drm/selftests/drm_selftest.h b/drivers/gpu/drm/selftests/drm_selftest.h new file mode 100644 index 000000000000..c784ec02ff53 --- /dev/null +++ b/drivers/gpu/drm/selftests/drm_selftest.h @@ -0,0 +1,41 @@ +/* + * Copyright © 2016 Intel Corporation + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice (including the next + * paragraph) shall be included in all copies or substantial portions of the + * Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS + * IN THE SOFTWARE. + */ + +#ifndef __DRM_SELFTEST_H__ +#define __DRM_SELFTEST_H__ + +struct drm_subtest { + int (*func)(void *data); + const char *name; +}; + +static int __drm_subtests(const char *caller, + const struct drm_subtest *st, + int count, + void *data); +#define drm_subtests(T, data) \ + __drm_subtests(__func__, T, ARRAY_SIZE(T), data) + +#define SUBTEST(x) { x, #x } + +#endif /* __DRM_SELFTEST_H__ */ diff --git a/drivers/gpu/drm/selftests/test-drm_mm.c b/drivers/gpu/drm/selftests/test-drm_mm.c new file mode 100644 index 000000000000..682f5f86f465 --- /dev/null +++ b/drivers/gpu/drm/selftests/test-drm_mm.c @@ -0,0 +1,58 @@ +/* + * Test cases for the drm_mm range manager + */ + +#define pr_fmt(fmt) "drm_mm: " fmt + +#include +#include +#include +#include +#include + +#include + +#include "../lib/drm_random.h" + +#define TESTS "drm_mm_selftests.h" +#include "drm_selftest.h" + +static unsigned int random_seed; +static unsigned int max_iterations = 8192; +static unsigned int max_prime = 128; + +static int igt_sanitycheck(void *ignored) +{ + pr_info("%s - ok!\n", __func__); + return 0; +} + +#include "drm_selftest.c" + +static int __init test_drm_mm_init(void) +{ + int err; + + while (!random_seed) + random_seed = get_random_int(); + + pr_info("Testing DRM range manger (struct drm_mm), with random_seed=0x%x max_iterations=%u max_prime=%u\n", + random_seed, max_iterations, max_prime); + err = run_selftests(selftests, ARRAY_SIZE(selftests), NULL); + + return err > 0 ? 0 : err; +} + +static void __exit test_drm_mm_exit(void) +{ +} + +module_init(test_drm_mm_init); +module_exit(test_drm_mm_exit); + +module_param(random_seed, uint, 0400); +module_param(max_iterations, uint, 0400); +module_param(max_prime, uint, 0400); + +MODULE_AUTHOR("Intel Corporation"); +MODULE_LICENSE("GPL"); diff --git a/tools/testing/selftests/drivers/gpu/drm_mm.sh b/tools/testing/selftests/drivers/gpu/drm_mm.sh new file mode 100755 index 000000000000..96dd55c92799 --- /dev/null +++ b/tools/testing/selftests/drivers/gpu/drm_mm.sh @@ -0,0 +1,15 @@ +#!/bin/sh +# Runs API tests for struct drm_mm (DRM range manager) + +if ! /sbin/modprobe -n -q test-drm_mm; then + echo "drivers/gpu/drm_mm: [skip]" + exit 77 +fi + +if /sbin/modprobe -q test-drm_mm; then + /sbin/modprobe -q -r test-drm_mm + echo "drivers/gpu/drm_mm: ok" +else + echo "drivers/gpu/drm_mm: [FAIL]" + exit 1 +fi