Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

6 files changed, 813 insertions, 0 deletions

diff --git a/drivers/gpu/drm/ttm/tests/.kunitconfig b/drivers/gpu/drm/ttm/tests/.kunitconfig
new file mode 100644
index 000000000..75fdce0cd
--- /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 000000000..ec87c4fc1
--- /dev/null
+++ b/drivers/gpu/drm/ttm/tests/Makefile
@@ -0,0 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0 AND MIT
+
+obj-$(CONFIG_DRM_TTM_KUNIT_TEST) += \
+        ttm_device_test.o \
+        ttm_pool_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 000000000..b1b423b68
--- /dev/null
+++ b/drivers/gpu/drm/ttm/tests/ttm_device_test.c
@@ -0,0 +1,212 @@
+// 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"
+
+struct ttm_device_test_case {
+	const char *description;
+	bool use_dma_alloc;
+	bool use_dma32;
+	bool pools_init_expected;
+};
+
+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 void ttm_device_init_multiple(struct kunit *test)
+{
+	struct ttm_test_devices *priv = test->priv;
+	struct ttm_device *ttm_devs;
+	unsigned int i, num_dev = 3;
+	int err;
+
+	ttm_devs = kunit_kcalloc(test, num_dev, sizeof(*ttm_devs), GFP_KERNEL);
+	KUNIT_ASSERT_NOT_NULL(test, ttm_devs);
+
+	for (i = 0; i < num_dev; i++) {
+		err = ttm_device_kunit_init(priv, &ttm_devs[i], false, false);
+		KUNIT_ASSERT_EQ(test, err, 0);
+
+		KUNIT_EXPECT_PTR_EQ(test, ttm_devs[i].dev_mapping,
+				    priv->drm->anon_inode->i_mapping);
+		KUNIT_ASSERT_NOT_NULL(test, ttm_devs[i].wq);
+		KUNIT_EXPECT_PTR_EQ(test, ttm_devs[i].funcs, &ttm_dev_funcs);
+		KUNIT_ASSERT_NOT_NULL(test, ttm_devs[i].man_drv[TTM_PL_SYSTEM]);
+	}
+
+	KUNIT_ASSERT_EQ(test, list_count_nodes(&ttm_devs[0].device_list), num_dev);
+
+	for (i = 0; i < num_dev; i++)
+		ttm_device_fini(&ttm_devs[i]);
+}
+
+static void ttm_device_fini_basic(struct kunit *test)
+{
+	struct ttm_test_devices *priv = test->priv;
+	struct ttm_device *ttm_dev;
+	struct ttm_resource_manager *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);
+
+	man = ttm_manager_type(ttm_dev, TTM_PL_SYSTEM);
+	KUNIT_ASSERT_NOT_NULL(test, man);
+
+	ttm_device_fini(ttm_dev);
+
+	KUNIT_ASSERT_FALSE(test, man->use_type);
+	KUNIT_ASSERT_TRUE(test, list_empty(&man->lru[0]));
+	KUNIT_ASSERT_NULL(test, ttm_dev->man_drv[TTM_PL_SYSTEM]);
+}
+
+static void ttm_device_init_no_vma_man(struct kunit *test)
+{
+	struct ttm_test_devices *priv = test->priv;
+	struct drm_device *drm = priv->drm;
+	struct ttm_device *ttm_dev;
+	struct drm_vma_offset_manager *vma_man;
+	int err;
+
+	ttm_dev = kunit_kzalloc(test, sizeof(*ttm_dev), GFP_KERNEL);
+	KUNIT_ASSERT_NOT_NULL(test, ttm_dev);
+
+	/* Let's pretend there's no VMA manager allocated */
+	vma_man = drm->vma_offset_manager;
+	drm->vma_offset_manager = NULL;
+
+	err = ttm_device_kunit_init(priv, ttm_dev, false, false);
+	KUNIT_EXPECT_EQ(test, err, -EINVAL);
+
+	/* Bring the manager back for a graceful cleanup */
+	drm->vma_offset_manager = vma_man;
+}
+
+static const struct ttm_device_test_case ttm_device_cases[] = {
+	{
+		.description = "No DMA allocations, no DMA32 required",
+		.use_dma_alloc = false,
+		.use_dma32 = false,
+		.pools_init_expected = false,
+	},
+	{
+		.description = "DMA allocations, DMA32 required",
+		.use_dma_alloc = true,
+		.use_dma32 = true,
+		.pools_init_expected = true,
+	},
+	{
+		.description = "No DMA allocations, DMA32 required",
+		.use_dma_alloc = false,
+		.use_dma32 = true,
+		.pools_init_expected = false,
+	},
+	{
+		.description = "DMA allocations, no DMA32 required",
+		.use_dma_alloc = true,
+		.use_dma32 = false,
+		.pools_init_expected = true,
+	},
+};
+
+static void ttm_device_case_desc(const struct ttm_device_test_case *t, char *desc)
+{
+	strscpy(desc, t->description, KUNIT_PARAM_DESC_SIZE);
+}
+
+KUNIT_ARRAY_PARAM(ttm_device, ttm_device_cases, ttm_device_case_desc);
+
+static void ttm_device_init_pools(struct kunit *test)
+{
+	struct ttm_test_devices *priv = test->priv;
+	const struct ttm_device_test_case *params = test->param_value;
+	struct ttm_device *ttm_dev;
+	struct ttm_pool *pool;
+	struct ttm_pool_type pt;
+	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,
+				    params->use_dma_alloc,
+				    params->use_dma32);
+	KUNIT_ASSERT_EQ(test, err, 0);
+
+	pool = &ttm_dev->pool;
+	KUNIT_ASSERT_NOT_NULL(test, pool);
+	KUNIT_EXPECT_PTR_EQ(test, pool->dev, priv->dev);
+	KUNIT_EXPECT_EQ(test, pool->use_dma_alloc, params->use_dma_alloc);
+	KUNIT_EXPECT_EQ(test, pool->use_dma32, params->use_dma32);
+
+	if (params->pools_init_expected) {
+		for (int i = 0; i < TTM_NUM_CACHING_TYPES; ++i) {
+			for (int j = 0; j <= MAX_ORDER; ++j) {
+				pt = pool->caching[i].orders[j];
+				KUNIT_EXPECT_PTR_EQ(test, pt.pool, pool);
+				KUNIT_EXPECT_EQ(test, pt.caching, i);
+				KUNIT_EXPECT_EQ(test, pt.order, j);
+
+				if (params->use_dma_alloc)
+					KUNIT_ASSERT_FALSE(test,
+							   list_empty(&pt.pages));
+			}
+		}
+	}
+
+	ttm_device_fini(ttm_dev);
+}
+
+static struct kunit_case ttm_device_test_cases[] = {
+	KUNIT_CASE(ttm_device_init_basic),
+	KUNIT_CASE(ttm_device_init_multiple),
+	KUNIT_CASE(ttm_device_fini_basic),
+	KUNIT_CASE(ttm_device_init_no_vma_man),
+	KUNIT_CASE_PARAM(ttm_device_init_pools, ttm_device_gen_params),
+	{}
+};
+
+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 000000000..81661d882
--- /dev/null
+++ b/drivers/gpu/drm/ttm/tests/ttm_kunit_helpers.c
@@ -0,0 +1,113 @@
+// 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_buffer_object *ttm_bo_kunit_init(struct kunit *test,
+					    struct ttm_test_devices *devs,
+					    size_t size)
+{
+	struct drm_gem_object gem_obj = { .size = size };
+	struct ttm_buffer_object *bo;
+
+	bo = kunit_kzalloc(test, sizeof(*bo), GFP_KERNEL);
+	KUNIT_ASSERT_NOT_NULL(test, bo);
+
+	bo->base = gem_obj;
+	bo->bdev = devs->ttm_dev;
+
+	return bo;
+}
+EXPORT_SYMBOL_GPL(ttm_bo_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 000000000..e261e3660
--- /dev/null
+++ b/drivers/gpu/drm/ttm/tests/ttm_kunit_helpers.h
@@ -0,0 +1,41 @@
+/* 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/ttm/ttm_bo.h>
+
+#include <drm/drm_kunit_helpers.h>
+#include <kunit/test.h>
+
+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_buffer_object *ttm_bo_kunit_init(struct kunit *test,
+					    struct ttm_test_devices *devs,
+					    size_t size);
+
+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
diff --git a/drivers/gpu/drm/ttm/tests/ttm_pool_test.c b/drivers/gpu/drm/ttm/tests/ttm_pool_test.c
new file mode 100644
index 000000000..2d9cae8cd
--- /dev/null
+++ b/drivers/gpu/drm/ttm/tests/ttm_pool_test.c
@@ -0,0 +1,437 @@
+// SPDX-License-Identifier: GPL-2.0 AND MIT
+/*
+ * Copyright © 2023 Intel Corporation
+ */
+#include <linux/mm.h>
+
+#include <drm/ttm/ttm_tt.h>
+#include <drm/ttm/ttm_pool.h>
+
+#include "ttm_kunit_helpers.h"
+
+struct ttm_pool_test_case {
+	const char *description;
+	unsigned int order;
+	bool use_dma_alloc;
+};
+
+struct ttm_pool_test_priv {
+	struct ttm_test_devices *devs;
+
+	/* Used to create mock ttm_tts */
+	struct ttm_buffer_object *mock_bo;
+};
+
+static struct ttm_operation_ctx simple_ctx = {
+	.interruptible = true,
+	.no_wait_gpu = false,
+};
+
+static int ttm_pool_test_init(struct kunit *test)
+{
+	struct ttm_pool_test_priv *priv;
+
+	priv = kunit_kzalloc(test, sizeof(*priv), GFP_KERNEL);
+	KUNIT_ASSERT_NOT_NULL(test, priv);
+
+	priv->devs = ttm_test_devices_basic(test);
+	test->priv = priv;
+
+	return 0;
+}
+
+static void ttm_pool_test_fini(struct kunit *test)
+{
+	struct ttm_pool_test_priv *priv = test->priv;
+
+	ttm_test_devices_put(test, priv->devs);
+}
+
+static struct ttm_tt *ttm_tt_kunit_init(struct kunit *test,
+					uint32_t page_flags,
+					enum ttm_caching caching,
+					size_t size)
+{
+	struct ttm_pool_test_priv *priv = test->priv;
+	struct ttm_buffer_object *bo;
+	struct ttm_tt *tt;
+	int err;
+
+	bo = ttm_bo_kunit_init(test, priv->devs, size);
+	KUNIT_ASSERT_NOT_NULL(test, bo);
+	priv->mock_bo = bo;
+
+	tt = kunit_kzalloc(test, sizeof(*tt), GFP_KERNEL);
+	KUNIT_ASSERT_NOT_NULL(test, tt);
+
+	err = ttm_tt_init(tt, priv->mock_bo, page_flags, caching, 0);
+	KUNIT_ASSERT_EQ(test, err, 0);
+
+	return tt;
+}
+
+static struct ttm_pool *ttm_pool_pre_populated(struct kunit *test,
+					       size_t size,
+					       enum ttm_caching caching)
+{
+	struct ttm_pool_test_priv *priv = test->priv;
+	struct ttm_test_devices *devs = priv->devs;
+	struct ttm_pool *pool;
+	struct ttm_tt *tt;
+	unsigned long order = __fls(size / PAGE_SIZE);
+	int err;
+
+	tt = ttm_tt_kunit_init(test, order, caching, size);
+	KUNIT_ASSERT_NOT_NULL(test, tt);
+
+	pool = kunit_kzalloc(test, sizeof(*pool), GFP_KERNEL);
+	KUNIT_ASSERT_NOT_NULL(test, pool);
+
+	ttm_pool_init(pool, devs->dev, NUMA_NO_NODE, true, false);
+
+	err = ttm_pool_alloc(pool, tt, &simple_ctx);
+	KUNIT_ASSERT_EQ(test, err, 0);
+
+	ttm_pool_free(pool, tt);
+	ttm_tt_fini(tt);
+
+	return pool;
+}
+
+static const struct ttm_pool_test_case ttm_pool_basic_cases[] = {
+	{
+		.description = "One page",
+		.order = 0,
+	},
+	{
+		.description = "More than one page",
+		.order = 2,
+	},
+	{
+		.description = "Above the allocation limit",
+		.order = MAX_ORDER + 1,
+	},
+	{
+		.description = "One page, with coherent DMA mappings enabled",
+		.order = 0,
+		.use_dma_alloc = true,
+	},
+	{
+		.description = "Above the allocation limit, with coherent DMA mappings enabled",
+		.order = MAX_ORDER + 1,
+		.use_dma_alloc = true,
+	},
+};
+
+static void ttm_pool_alloc_case_desc(const struct ttm_pool_test_case *t,
+				     char *desc)
+{
+	strscpy(desc, t->description, KUNIT_PARAM_DESC_SIZE);
+}
+
+KUNIT_ARRAY_PARAM(ttm_pool_alloc_basic, ttm_pool_basic_cases,
+		  ttm_pool_alloc_case_desc);
+
+static void ttm_pool_alloc_basic(struct kunit *test)
+{
+	struct ttm_pool_test_priv *priv = test->priv;
+	struct ttm_test_devices *devs = priv->devs;
+	const struct ttm_pool_test_case *params = test->param_value;
+	struct ttm_tt *tt;
+	struct ttm_pool *pool;
+	struct page *fst_page, *last_page;
+	enum ttm_caching caching = ttm_uncached;
+	unsigned int expected_num_pages = 1 << params->order;
+	size_t size = expected_num_pages * PAGE_SIZE;
+	int err;
+
+	tt = ttm_tt_kunit_init(test, 0, caching, size);
+	KUNIT_ASSERT_NOT_NULL(test, tt);
+
+	pool = kunit_kzalloc(test, sizeof(*pool), GFP_KERNEL);
+	KUNIT_ASSERT_NOT_NULL(test, pool);
+
+	ttm_pool_init(pool, devs->dev, NUMA_NO_NODE, params->use_dma_alloc,
+		      false);
+
+	KUNIT_ASSERT_PTR_EQ(test, pool->dev, devs->dev);
+	KUNIT_ASSERT_EQ(test, pool->nid, NUMA_NO_NODE);
+	KUNIT_ASSERT_EQ(test, pool->use_dma_alloc, params->use_dma_alloc);
+
+	err = ttm_pool_alloc(pool, tt, &simple_ctx);
+	KUNIT_ASSERT_EQ(test, err, 0);
+	KUNIT_ASSERT_EQ(test, tt->num_pages, expected_num_pages);
+
+	fst_page = tt->pages[0];
+	last_page = tt->pages[tt->num_pages - 1];
+
+	if (params->order <= MAX_ORDER) {
+		if (params->use_dma_alloc) {
+			KUNIT_ASSERT_NOT_NULL(test, (void *)fst_page->private);
+			KUNIT_ASSERT_NOT_NULL(test, (void *)last_page->private);
+		} else {
+			KUNIT_ASSERT_EQ(test, fst_page->private, params->order);
+		}
+	} else {
+		if (params->use_dma_alloc) {
+			KUNIT_ASSERT_NOT_NULL(test, (void *)fst_page->private);
+			KUNIT_ASSERT_NULL(test, (void *)last_page->private);
+		} else {
+			/*
+			 * We expect to alloc one big block, followed by
+			 * order 0 blocks
+			 */
+			KUNIT_ASSERT_EQ(test, fst_page->private,
+					min_t(unsigned int, MAX_ORDER,
+					      params->order));
+			KUNIT_ASSERT_EQ(test, last_page->private, 0);
+		}
+	}
+
+	ttm_pool_free(pool, tt);
+	ttm_tt_fini(tt);
+	ttm_pool_fini(pool);
+}
+
+static void ttm_pool_alloc_basic_dma_addr(struct kunit *test)
+{
+	struct ttm_pool_test_priv *priv = test->priv;
+	struct ttm_test_devices *devs = priv->devs;
+	const struct ttm_pool_test_case *params = test->param_value;
+	struct ttm_tt *tt;
+	struct ttm_pool *pool;
+	struct ttm_buffer_object *bo;
+	dma_addr_t dma1, dma2;
+	enum ttm_caching caching = ttm_uncached;
+	unsigned int expected_num_pages = 1 << params->order;
+	size_t size = expected_num_pages * PAGE_SIZE;
+	int err;
+
+	tt = kunit_kzalloc(test, sizeof(*tt), GFP_KERNEL);
+	KUNIT_ASSERT_NOT_NULL(test, tt);
+
+	bo = ttm_bo_kunit_init(test, devs, size);
+	KUNIT_ASSERT_NOT_NULL(test, bo);
+
+	err = ttm_sg_tt_init(tt, bo, 0, caching);
+	KUNIT_ASSERT_EQ(test, err, 0);
+
+	pool = kunit_kzalloc(test, sizeof(*pool), GFP_KERNEL);
+	KUNIT_ASSERT_NOT_NULL(test, pool);
+
+	ttm_pool_init(pool, devs->dev, NUMA_NO_NODE, true, false);
+
+	err = ttm_pool_alloc(pool, tt, &simple_ctx);
+	KUNIT_ASSERT_EQ(test, err, 0);
+	KUNIT_ASSERT_EQ(test, tt->num_pages, expected_num_pages);
+
+	dma1 = tt->dma_address[0];
+	dma2 = tt->dma_address[tt->num_pages - 1];
+
+	KUNIT_ASSERT_NOT_NULL(test, (void *)(uintptr_t)dma1);
+	KUNIT_ASSERT_NOT_NULL(test, (void *)(uintptr_t)dma2);
+
+	ttm_pool_free(pool, tt);
+	ttm_tt_fini(tt);
+	ttm_pool_fini(pool);
+}
+
+static void ttm_pool_alloc_order_caching_match(struct kunit *test)
+{
+	struct ttm_tt *tt;
+	struct ttm_pool *pool;
+	struct ttm_pool_type *pt;
+	enum ttm_caching caching = ttm_uncached;
+	unsigned int order = 0;
+	size_t size = PAGE_SIZE;
+	int err;
+
+	pool = ttm_pool_pre_populated(test, size, caching);
+
+	pt = &pool->caching[caching].orders[order];
+	KUNIT_ASSERT_FALSE(test, list_empty(&pt->pages));
+
+	tt = ttm_tt_kunit_init(test, 0, caching, size);
+	KUNIT_ASSERT_NOT_NULL(test, tt);
+
+	err = ttm_pool_alloc(pool, tt, &simple_ctx);
+	KUNIT_ASSERT_EQ(test, err, 0);
+
+	KUNIT_ASSERT_TRUE(test, list_empty(&pt->pages));
+
+	ttm_pool_free(pool, tt);
+	ttm_tt_fini(tt);
+	ttm_pool_fini(pool);
+}
+
+static void ttm_pool_alloc_caching_mismatch(struct kunit *test)
+{
+	struct ttm_tt *tt;
+	struct ttm_pool *pool;
+	struct ttm_pool_type *pt_pool, *pt_tt;
+	enum ttm_caching tt_caching = ttm_uncached;
+	enum ttm_caching pool_caching = ttm_cached;
+	size_t size = PAGE_SIZE;
+	unsigned int order = 0;
+	int err;
+
+	pool = ttm_pool_pre_populated(test, size, pool_caching);
+
+	pt_pool = &pool->caching[pool_caching].orders[order];
+	pt_tt = &pool->caching[tt_caching].orders[order];
+
+	tt = ttm_tt_kunit_init(test, 0, tt_caching, size);
+	KUNIT_ASSERT_NOT_NULL(test, tt);
+
+	KUNIT_ASSERT_FALSE(test, list_empty(&pt_pool->pages));
+	KUNIT_ASSERT_TRUE(test, list_empty(&pt_tt->pages));
+
+	err = ttm_pool_alloc(pool, tt, &simple_ctx);
+	KUNIT_ASSERT_EQ(test, err, 0);
+
+	ttm_pool_free(pool, tt);
+	ttm_tt_fini(tt);
+
+	KUNIT_ASSERT_FALSE(test, list_empty(&pt_pool->pages));
+	KUNIT_ASSERT_FALSE(test, list_empty(&pt_tt->pages));
+
+	ttm_pool_fini(pool);
+}
+
+static void ttm_pool_alloc_order_mismatch(struct kunit *test)
+{
+	struct ttm_tt *tt;
+	struct ttm_pool *pool;
+	struct ttm_pool_type *pt_pool, *pt_tt;
+	enum ttm_caching caching = ttm_uncached;
+	unsigned int order = 2;
+	size_t fst_size = (1 << order) * PAGE_SIZE;
+	size_t snd_size = PAGE_SIZE;
+	int err;
+
+	pool = ttm_pool_pre_populated(test, fst_size, caching);
+
+	pt_pool = &pool->caching[caching].orders[order];
+	pt_tt = &pool->caching[caching].orders[0];
+
+	tt = ttm_tt_kunit_init(test, 0, caching, snd_size);
+	KUNIT_ASSERT_NOT_NULL(test, tt);
+
+	KUNIT_ASSERT_FALSE(test, list_empty(&pt_pool->pages));
+	KUNIT_ASSERT_TRUE(test, list_empty(&pt_tt->pages));
+
+	err = ttm_pool_alloc(pool, tt, &simple_ctx);
+	KUNIT_ASSERT_EQ(test, err, 0);
+
+	ttm_pool_free(pool, tt);
+	ttm_tt_fini(tt);
+
+	KUNIT_ASSERT_FALSE(test, list_empty(&pt_pool->pages));
+	KUNIT_ASSERT_FALSE(test, list_empty(&pt_tt->pages));
+
+	ttm_pool_fini(pool);
+}
+
+static void ttm_pool_free_dma_alloc(struct kunit *test)
+{
+	struct ttm_pool_test_priv *priv = test->priv;
+	struct ttm_test_devices *devs = priv->devs;
+	struct ttm_tt *tt;
+	struct ttm_pool *pool;
+	struct ttm_pool_type *pt;
+	enum ttm_caching caching = ttm_uncached;
+	unsigned int order = 2;
+	size_t size = (1 << order) * PAGE_SIZE;
+
+	tt = ttm_tt_kunit_init(test, 0, caching, size);
+	KUNIT_ASSERT_NOT_NULL(test, tt);
+
+	pool = kunit_kzalloc(test, sizeof(*pool), GFP_KERNEL);
+	KUNIT_ASSERT_NOT_NULL(test, pool);
+
+	ttm_pool_init(pool, devs->dev, NUMA_NO_NODE, true, false);
+	ttm_pool_alloc(pool, tt, &simple_ctx);
+
+	pt = &pool->caching[caching].orders[order];
+	KUNIT_ASSERT_TRUE(test, list_empty(&pt->pages));
+
+	ttm_pool_free(pool, tt);
+	ttm_tt_fini(tt);
+
+	KUNIT_ASSERT_FALSE(test, list_empty(&pt->pages));
+
+	ttm_pool_fini(pool);
+}
+
+static void ttm_pool_free_no_dma_alloc(struct kunit *test)
+{
+	struct ttm_pool_test_priv *priv = test->priv;
+	struct ttm_test_devices *devs = priv->devs;
+	struct ttm_tt *tt;
+	struct ttm_pool *pool;
+	struct ttm_pool_type *pt;
+	enum ttm_caching caching = ttm_uncached;
+	unsigned int order = 2;
+	size_t size = (1 << order) * PAGE_SIZE;
+
+	tt = ttm_tt_kunit_init(test, 0, caching, size);
+	KUNIT_ASSERT_NOT_NULL(test, tt);
+
+	pool = kunit_kzalloc(test, sizeof(*pool), GFP_KERNEL);
+	KUNIT_ASSERT_NOT_NULL(test, pool);
+
+	ttm_pool_init(pool, devs->dev, NUMA_NO_NODE, false, false);
+	ttm_pool_alloc(pool, tt, &simple_ctx);
+
+	pt = &pool->caching[caching].orders[order];
+	KUNIT_ASSERT_TRUE(test, list_is_singular(&pt->pages));
+
+	ttm_pool_free(pool, tt);
+	ttm_tt_fini(tt);
+
+	KUNIT_ASSERT_TRUE(test, list_is_singular(&pt->pages));
+
+	ttm_pool_fini(pool);
+}
+
+static void ttm_pool_fini_basic(struct kunit *test)
+{
+	struct ttm_pool *pool;
+	struct ttm_pool_type *pt;
+	enum ttm_caching caching = ttm_uncached;
+	unsigned int order = 0;
+	size_t size = PAGE_SIZE;
+
+	pool = ttm_pool_pre_populated(test, size, caching);
+	pt = &pool->caching[caching].orders[order];
+
+	KUNIT_ASSERT_FALSE(test, list_empty(&pt->pages));
+
+	ttm_pool_fini(pool);
+
+	KUNIT_ASSERT_TRUE(test, list_empty(&pt->pages));
+}
+
+static struct kunit_case ttm_pool_test_cases[] = {
+	KUNIT_CASE_PARAM(ttm_pool_alloc_basic, ttm_pool_alloc_basic_gen_params),
+	KUNIT_CASE_PARAM(ttm_pool_alloc_basic_dma_addr,
+			 ttm_pool_alloc_basic_gen_params),
+	KUNIT_CASE(ttm_pool_alloc_order_caching_match),
+	KUNIT_CASE(ttm_pool_alloc_caching_mismatch),
+	KUNIT_CASE(ttm_pool_alloc_order_mismatch),
+	KUNIT_CASE(ttm_pool_free_dma_alloc),
+	KUNIT_CASE(ttm_pool_free_no_dma_alloc),
+	KUNIT_CASE(ttm_pool_fini_basic),
+	{}
+};
+
+static struct kunit_suite ttm_pool_test_suite = {
+	.name = "ttm_pool",
+	.init = ttm_pool_test_init,
+	.exit = ttm_pool_test_fini,
+	.test_cases = ttm_pool_test_cases,
+};
+
+kunit_test_suites(&ttm_pool_test_suite);
+
+MODULE_LICENSE("GPL");