From e3912d09bf8ddd8e274118d4c9cc550d9665115d Mon Sep 17 00:00:00 2001 From: Karolina Stolarek Date: Tue, 8 Aug 2023 11:51:12 +0200 Subject: [PATCH] drm/ttm: Introduce KUnit test MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Add the initial version of unit tests for ttm_device struct, together with helper functions. Signed-off-by: Karolina Stolarek Reviewed-by: Christian König Link: https://patchwork.freedesktop.org/patch/msgid/3d1cc45c8a0cf536b92a850e0025f6c555de0169.1691487006.git.karolina.stolarek@intel.com Signed-off-by: Christian König --- drivers/gpu/drm/Kconfig | 15 +++++ drivers/gpu/drm/ttm/Makefile | 1 + drivers/gpu/drm/ttm/tests/.kunitconfig | 4 ++ drivers/gpu/drm/ttm/tests/Makefile | 5 ++ drivers/gpu/drm/ttm/tests/ttm_device_test.c | 54 +++++++++++++++ drivers/gpu/drm/ttm/tests/ttm_kunit_helpers.c | 96 +++++++++++++++++++++++++++ drivers/gpu/drm/ttm/tests/ttm_kunit_helpers.h | 37 +++++++++++ 7 files changed, 212 insertions(+) create mode 100644 drivers/gpu/drm/ttm/tests/.kunitconfig create mode 100644 drivers/gpu/drm/ttm/tests/Makefile create mode 100644 drivers/gpu/drm/ttm/tests/ttm_device_test.c create mode 100644 drivers/gpu/drm/ttm/tests/ttm_kunit_helpers.c create mode 100644 drivers/gpu/drm/ttm/tests/ttm_kunit_helpers.h diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig index 2a44b94..9d1f0e0 100644 --- a/drivers/gpu/drm/Kconfig +++ b/drivers/gpu/drm/Kconfig @@ -195,6 +195,21 @@ config DRM_TTM GPU memory types. Will be enabled automatically if a device driver uses it. +config DRM_TTM_KUNIT_TEST + tristate "KUnit tests for TTM" if !KUNIT_ALL_TESTS + default n + depends on DRM && KUNIT + select DRM_TTM + select DRM_EXPORT_FOR_TESTS if m + select DRM_KUNIT_TEST_HELPERS + default KUNIT_ALL_TESTS + help + Enables unit tests for TTM, a GPU memory manager subsystem used + to manage memory buffers. This option is mostly useful for kernel + developers. + + If in doubt, say "N". + config DRM_EXEC tristate depends on DRM diff --git a/drivers/gpu/drm/ttm/Makefile b/drivers/gpu/drm/ttm/Makefile index f906b22..dad2981 100644 --- a/drivers/gpu/drm/ttm/Makefile +++ b/drivers/gpu/drm/ttm/Makefile @@ -8,3 +8,4 @@ ttm-y := ttm_tt.o ttm_bo.o ttm_bo_util.o ttm_bo_vm.o ttm_module.o \ ttm-$(CONFIG_AGP) += ttm_agp_backend.o obj-$(CONFIG_DRM_TTM) += ttm.o +obj-$(CONFIG_DRM_TTM_KUNIT_TEST) += tests/ diff --git a/drivers/gpu/drm/ttm/tests/.kunitconfig b/drivers/gpu/drm/ttm/tests/.kunitconfig new file mode 100644 index 0000000..75fdce0 --- /dev/null +++ b/drivers/gpu/drm/ttm/tests/.kunitconfig @@ -0,0 +1,4 @@ +CONFIG_KUNIT=y +CONFIG_DRM=y +CONFIG_DRM_KUNIT_TEST_HELPERS=y +CONFIG_DRM_TTM_KUNIT_TEST=y diff --git a/drivers/gpu/drm/ttm/tests/Makefile b/drivers/gpu/drm/ttm/tests/Makefile new file mode 100644 index 0000000..7917805 --- /dev/null +++ b/drivers/gpu/drm/ttm/tests/Makefile @@ -0,0 +1,5 @@ +# SPDX-License-Identifier: GPL-2.0 AND MIT + +obj-$(CONFIG_DRM_TTM_KUNIT_TEST) += \ + ttm_device_test.o \ + ttm_kunit_helpers.o diff --git a/drivers/gpu/drm/ttm/tests/ttm_device_test.c b/drivers/gpu/drm/ttm/tests/ttm_device_test.c new file mode 100644 index 0000000..76d927d --- /dev/null +++ b/drivers/gpu/drm/ttm/tests/ttm_device_test.c @@ -0,0 +1,54 @@ +// SPDX-License-Identifier: GPL-2.0 AND MIT +/* + * Copyright © 2023 Intel Corporation + */ +#include +#include +#include + +#include "ttm_kunit_helpers.h" + +static void ttm_device_init_basic(struct kunit *test) +{ + struct ttm_test_devices *priv = test->priv; + struct ttm_device *ttm_dev; + struct ttm_resource_manager *ttm_sys_man; + int err; + + ttm_dev = kunit_kzalloc(test, sizeof(*ttm_dev), GFP_KERNEL); + KUNIT_ASSERT_NOT_NULL(test, ttm_dev); + + err = ttm_device_kunit_init(priv, ttm_dev, false, false); + KUNIT_ASSERT_EQ(test, err, 0); + + KUNIT_EXPECT_PTR_EQ(test, ttm_dev->funcs, &ttm_dev_funcs); + KUNIT_ASSERT_NOT_NULL(test, ttm_dev->wq); + KUNIT_ASSERT_NOT_NULL(test, ttm_dev->man_drv[TTM_PL_SYSTEM]); + + ttm_sys_man = &ttm_dev->sysman; + KUNIT_ASSERT_NOT_NULL(test, ttm_sys_man); + KUNIT_EXPECT_TRUE(test, ttm_sys_man->use_tt); + KUNIT_EXPECT_TRUE(test, ttm_sys_man->use_type); + KUNIT_ASSERT_NOT_NULL(test, ttm_sys_man->func); + + KUNIT_EXPECT_PTR_EQ(test, ttm_dev->dev_mapping, + priv->drm->anon_inode->i_mapping); + + ttm_device_fini(ttm_dev); +} + +static struct kunit_case ttm_device_test_cases[] = { + KUNIT_CASE(ttm_device_init_basic), + {} +}; + +static struct kunit_suite ttm_device_test_suite = { + .name = "ttm_device", + .init = ttm_test_devices_init, + .exit = ttm_test_devices_fini, + .test_cases = ttm_device_test_cases, +}; + +kunit_test_suites(&ttm_device_test_suite); + +MODULE_LICENSE("GPL"); diff --git a/drivers/gpu/drm/ttm/tests/ttm_kunit_helpers.c b/drivers/gpu/drm/ttm/tests/ttm_kunit_helpers.c new file mode 100644 index 0000000..dedc185 --- /dev/null +++ b/drivers/gpu/drm/ttm/tests/ttm_kunit_helpers.c @@ -0,0 +1,96 @@ +// SPDX-License-Identifier: GPL-2.0 AND MIT +/* + * Copyright © 2023 Intel Corporation + */ +#include "ttm_kunit_helpers.h" + +struct ttm_device_funcs ttm_dev_funcs = { +}; +EXPORT_SYMBOL_GPL(ttm_dev_funcs); + +int ttm_device_kunit_init(struct ttm_test_devices *priv, + struct ttm_device *ttm, + bool use_dma_alloc, + bool use_dma32) +{ + struct drm_device *drm = priv->drm; + int err; + + err = ttm_device_init(ttm, &ttm_dev_funcs, drm->dev, + drm->anon_inode->i_mapping, + drm->vma_offset_manager, + use_dma_alloc, use_dma32); + + return err; +} +EXPORT_SYMBOL_GPL(ttm_device_kunit_init); + +struct ttm_test_devices *ttm_test_devices_basic(struct kunit *test) +{ + struct ttm_test_devices *devs; + + devs = kunit_kzalloc(test, sizeof(*devs), GFP_KERNEL); + KUNIT_ASSERT_NOT_NULL(test, devs); + + devs->dev = drm_kunit_helper_alloc_device(test); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, devs->dev); + + devs->drm = __drm_kunit_helper_alloc_drm_device(test, devs->dev, + sizeof(*devs->drm), 0, + DRIVER_GEM); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, devs->drm); + + return devs; +} +EXPORT_SYMBOL_GPL(ttm_test_devices_basic); + +struct ttm_test_devices *ttm_test_devices_all(struct kunit *test) +{ + struct ttm_test_devices *devs; + struct ttm_device *ttm_dev; + int err; + + devs = ttm_test_devices_basic(test); + + ttm_dev = kunit_kzalloc(test, sizeof(*ttm_dev), GFP_KERNEL); + KUNIT_ASSERT_NOT_NULL(test, ttm_dev); + + err = ttm_device_kunit_init(devs, ttm_dev, false, false); + KUNIT_ASSERT_EQ(test, err, 0); + + devs->ttm_dev = ttm_dev; + + return devs; +} +EXPORT_SYMBOL_GPL(ttm_test_devices_all); + +void ttm_test_devices_put(struct kunit *test, struct ttm_test_devices *devs) +{ + if (devs->ttm_dev) + ttm_device_fini(devs->ttm_dev); + + drm_kunit_helper_free_device(test, devs->dev); +} +EXPORT_SYMBOL_GPL(ttm_test_devices_put); + +int ttm_test_devices_init(struct kunit *test) +{ + struct ttm_test_devices *priv; + + priv = kunit_kzalloc(test, sizeof(*priv), GFP_KERNEL); + KUNIT_ASSERT_NOT_NULL(test, priv); + + priv = ttm_test_devices_basic(test); + test->priv = priv; + + return 0; +} +EXPORT_SYMBOL_GPL(ttm_test_devices_init); + +void ttm_test_devices_fini(struct kunit *test) +{ + ttm_test_devices_put(test, test->priv); +} +EXPORT_SYMBOL_GPL(ttm_test_devices_fini); + +MODULE_LICENSE("GPL"); diff --git a/drivers/gpu/drm/ttm/tests/ttm_kunit_helpers.h b/drivers/gpu/drm/ttm/tests/ttm_kunit_helpers.h new file mode 100644 index 0000000..f9f5bc0 --- /dev/null +++ b/drivers/gpu/drm/ttm/tests/ttm_kunit_helpers.h @@ -0,0 +1,37 @@ +/* SPDX-License-Identifier: GPL-2.0 AND MIT */ +/* + * Copyright © 2023 Intel Corporation + */ +#ifndef TTM_KUNIT_HELPERS_H +#define TTM_KUNIT_HELPERS_H + +#include +#include + +#include +#include + +extern struct ttm_device_funcs ttm_dev_funcs; + +struct ttm_test_devices { + struct drm_device *drm; + struct device *dev; + struct ttm_device *ttm_dev; +}; + +/* Building blocks for test-specific init functions */ +int ttm_device_kunit_init(struct ttm_test_devices *priv, + struct ttm_device *ttm, + bool use_dma_alloc, + bool use_dma32); + +struct ttm_test_devices *ttm_test_devices_basic(struct kunit *test); +struct ttm_test_devices *ttm_test_devices_all(struct kunit *test); + +void ttm_test_devices_put(struct kunit *test, struct ttm_test_devices *devs); + +/* Generic init/fini for tests that only need DRM/TTM devices */ +int ttm_test_devices_init(struct kunit *test); +void ttm_test_devices_fini(struct kunit *test); + +#endif // TTM_KUNIT_HELPERS_H -- 2.7.4