[RFC v2 1/3] drm/ttm: Introduce KUnit tests
Karolina Stolarek
karolina.stolarek at intel.com
Tue Jun 27 08:32:08 UTC 2023
Add the initial version of unit tests for ttm_device struct, together
with helper functions.
Signed-off-by: Karolina Stolarek <karolina.stolarek at intel.com>
---
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 | 59 +++++++++++++++++++
drivers/gpu/drm/ttm/tests/ttm_kunit_helpers.h | 29 +++++++++
7 files changed, 167 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 afb3b2f5f425..53024e44a2d5 100644
--- a/drivers/gpu/drm/Kconfig
+++ b/drivers/gpu/drm/Kconfig
@@ -194,6 +194,21 @@ 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_BUDDY
tristate
depends on DRM
diff --git a/drivers/gpu/drm/ttm/Makefile b/drivers/gpu/drm/ttm/Makefile
index f906b22959cf..dad298127226 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-$(CONFIG_DRM_TTM_KUNIT_TEST) += tests/
diff --git a/drivers/gpu/drm/ttm/tests/.kunitconfig b/drivers/gpu/drm/ttm/tests/.kunitconfig
new file mode 100644
index 000000000000..75fdce0cd98e
--- /dev/null
+++ b/drivers/gpu/drm/ttm/tests/.kunitconfig
@@ -0,0 +1,4 @@
+CONFIG_KUNIT=y
+CONFIG_DRM=y
+CONFIG_DRM_KUNIT_TEST_HELPERS=y
+CONFIG_DRM_TTM_KUNIT_TEST=y
diff --git a/drivers/gpu/drm/ttm/tests/Makefile b/drivers/gpu/drm/ttm/tests/Makefile
new file mode 100644
index 000000000000..7917805f37af
--- /dev/null
+++ b/drivers/gpu/drm/ttm/tests/Makefile
@@ -0,0 +1,5 @@
+# SPDX-License-Identifier: GPL-2.0 AND MIT
+
+obj-$(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 000000000000..08d7314b1e35
--- /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 <drm/ttm/ttm_resource.h>
+#include <drm/ttm/ttm_device.h>
+#include <drm/ttm/ttm_placement.h>
+
+#include "ttm_kunit_helpers.h"
+
+static void ttm_device_init_basic(struct kunit *test)
+{
+ struct ttm_test_devices_priv *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_kunit_helper_alloc_device(test, 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 000000000000..d03db0405484
--- /dev/null
+++ b/drivers/gpu/drm/ttm/tests/ttm_kunit_helpers.c
@@ -0,0 +1,59 @@
+// 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_kunit_helper_alloc_device(struct kunit *test,
+ struct ttm_device *ttm,
+ bool use_dma_alloc,
+ bool use_dma32)
+{
+ struct ttm_test_devices_priv *priv = test->priv;
+ 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_kunit_helper_alloc_device);
+
+int ttm_test_devices_init(struct kunit *test)
+{
+ struct ttm_test_devices_priv *priv;
+
+ priv = kunit_kzalloc(test, sizeof(*priv), GFP_KERNEL);
+ KUNIT_ASSERT_NOT_NULL(test, priv);
+
+ test->priv = priv;
+
+ priv->dev = drm_kunit_helper_alloc_device(test);
+ KUNIT_ASSERT_NOT_ERR_OR_NULL(test, priv->dev);
+
+ priv->drm = __drm_kunit_helper_alloc_drm_device(test, priv->dev,
+ sizeof(*priv->drm), 0,
+ DRIVER_GEM);
+ KUNIT_ASSERT_NOT_ERR_OR_NULL(test, priv->drm);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(ttm_test_devices_init);
+
+void ttm_test_devices_fini(struct kunit *test)
+{
+ struct ttm_test_devices_priv *priv = test->priv;
+
+ drm_kunit_helper_free_device(test, priv->dev);
+ drm_dev_put(priv->drm);
+}
+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 000000000000..69fb03b9c4d2
--- /dev/null
+++ b/drivers/gpu/drm/ttm/tests/ttm_kunit_helpers.h
@@ -0,0 +1,29 @@
+/* SPDX-License-Identifier: GPL-2.0 AND MIT */
+/*
+ * Copyright © 2023 Intel Corporation
+ */
+#ifndef TTM_KUNIT_HELPERS_H
+#define TTM_KUNIT_HELPERS_H
+
+#include <drm/drm_drv.h>
+#include <drm/ttm/ttm_device.h>
+
+#include <drm/drm_kunit_helpers.h>
+#include <kunit/test.h>
+
+extern struct ttm_device_funcs ttm_dev_funcs;
+
+struct ttm_test_devices_priv {
+ struct drm_device *drm;
+ struct device *dev;
+};
+
+int ttm_kunit_helper_alloc_device(struct kunit *test,
+ struct ttm_device *ttm,
+ bool use_dma_alloc,
+ bool use_dma32);
+
+int ttm_test_devices_init(struct kunit *test);
+void ttm_test_devices_fini(struct kunit *test);
+
+#endif // TTM_KUNIT_HELPERS_H
--
2.25.1
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