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1// SPDX-License-Identifier: GPL-2.0 AND MIT2/*3 * Copyright © 2023 Intel Corporation4 */5#include <drm/ttm/ttm_resource.h>6#include <drm/ttm/ttm_device.h>7#include <drm/ttm/ttm_placement.h>8 9#include "ttm_kunit_helpers.h"10 11struct ttm_device_test_case {12	const char *description;13	bool use_dma_alloc;14	bool use_dma32;15	bool pools_init_expected;16};17 18static void ttm_device_init_basic(struct kunit *test)19{20	struct ttm_test_devices *priv = test->priv;21	struct ttm_device *ttm_dev;22	struct ttm_resource_manager *ttm_sys_man;23	int err;24 25	ttm_dev = kunit_kzalloc(test, sizeof(*ttm_dev), GFP_KERNEL);26	KUNIT_ASSERT_NOT_NULL(test, ttm_dev);27 28	err = ttm_device_kunit_init(priv, ttm_dev, false, false);29	KUNIT_ASSERT_EQ(test, err, 0);30 31	KUNIT_EXPECT_PTR_EQ(test, ttm_dev->funcs, &ttm_dev_funcs);32	KUNIT_ASSERT_NOT_NULL(test, ttm_dev->wq);33	KUNIT_ASSERT_NOT_NULL(test, ttm_dev->man_drv[TTM_PL_SYSTEM]);34 35	ttm_sys_man = &ttm_dev->sysman;36	KUNIT_ASSERT_NOT_NULL(test, ttm_sys_man);37	KUNIT_EXPECT_TRUE(test, ttm_sys_man->use_tt);38	KUNIT_EXPECT_TRUE(test, ttm_sys_man->use_type);39	KUNIT_ASSERT_NOT_NULL(test, ttm_sys_man->func);40 41	KUNIT_EXPECT_PTR_EQ(test, ttm_dev->dev_mapping,42			    priv->drm->anon_inode->i_mapping);43 44	ttm_device_fini(ttm_dev);45}46 47static void ttm_device_init_multiple(struct kunit *test)48{49	struct ttm_test_devices *priv = test->priv;50	struct ttm_device *ttm_devs;51	unsigned int i, num_dev = 3;52	int err;53 54	ttm_devs = kunit_kcalloc(test, num_dev, sizeof(*ttm_devs), GFP_KERNEL);55	KUNIT_ASSERT_NOT_NULL(test, ttm_devs);56 57	for (i = 0; i < num_dev; i++) {58		err = ttm_device_kunit_init(priv, &ttm_devs[i], false, false);59		KUNIT_ASSERT_EQ(test, err, 0);60 61		KUNIT_EXPECT_PTR_EQ(test, ttm_devs[i].dev_mapping,62				    priv->drm->anon_inode->i_mapping);63		KUNIT_ASSERT_NOT_NULL(test, ttm_devs[i].wq);64		KUNIT_EXPECT_PTR_EQ(test, ttm_devs[i].funcs, &ttm_dev_funcs);65		KUNIT_ASSERT_NOT_NULL(test, ttm_devs[i].man_drv[TTM_PL_SYSTEM]);66	}67 68	KUNIT_ASSERT_EQ(test, list_count_nodes(&ttm_devs[0].device_list), num_dev);69 70	for (i = 0; i < num_dev; i++)71		ttm_device_fini(&ttm_devs[i]);72}73 74static void ttm_device_fini_basic(struct kunit *test)75{76	struct ttm_test_devices *priv = test->priv;77	struct ttm_device *ttm_dev;78	struct ttm_resource_manager *man;79	int err;80 81	ttm_dev = kunit_kzalloc(test, sizeof(*ttm_dev), GFP_KERNEL);82	KUNIT_ASSERT_NOT_NULL(test, ttm_dev);83 84	err = ttm_device_kunit_init(priv, ttm_dev, false, false);85	KUNIT_ASSERT_EQ(test, err, 0);86 87	man = ttm_manager_type(ttm_dev, TTM_PL_SYSTEM);88	KUNIT_ASSERT_NOT_NULL(test, man);89 90	ttm_device_fini(ttm_dev);91 92	KUNIT_ASSERT_FALSE(test, man->use_type);93	KUNIT_ASSERT_TRUE(test, list_empty(&man->lru[0]));94	KUNIT_ASSERT_NULL(test, ttm_dev->man_drv[TTM_PL_SYSTEM]);95}96 97static void ttm_device_init_no_vma_man(struct kunit *test)98{99	struct ttm_test_devices *priv = test->priv;100	struct drm_device *drm = priv->drm;101	struct ttm_device *ttm_dev;102	struct drm_vma_offset_manager *vma_man;103	int err;104 105	ttm_dev = kunit_kzalloc(test, sizeof(*ttm_dev), GFP_KERNEL);106	KUNIT_ASSERT_NOT_NULL(test, ttm_dev);107 108	/* Let's pretend there's no VMA manager allocated */109	vma_man = drm->vma_offset_manager;110	drm->vma_offset_manager = NULL;111 112	err = ttm_device_kunit_init(priv, ttm_dev, false, false);113	KUNIT_EXPECT_EQ(test, err, -EINVAL);114 115	/* Bring the manager back for a graceful cleanup */116	drm->vma_offset_manager = vma_man;117}118 119static const struct ttm_device_test_case ttm_device_cases[] = {120	{121		.description = "No DMA allocations, no DMA32 required",122		.use_dma_alloc = false,123		.use_dma32 = false,124		.pools_init_expected = false,125	},126	{127		.description = "DMA allocations, DMA32 required",128		.use_dma_alloc = true,129		.use_dma32 = true,130		.pools_init_expected = true,131	},132	{133		.description = "No DMA allocations, DMA32 required",134		.use_dma_alloc = false,135		.use_dma32 = true,136		.pools_init_expected = false,137	},138	{139		.description = "DMA allocations, no DMA32 required",140		.use_dma_alloc = true,141		.use_dma32 = false,142		.pools_init_expected = true,143	},144};145 146static void ttm_device_case_desc(const struct ttm_device_test_case *t, char *desc)147{148	strscpy(desc, t->description, KUNIT_PARAM_DESC_SIZE);149}150 151KUNIT_ARRAY_PARAM(ttm_device, ttm_device_cases, ttm_device_case_desc);152 153static void ttm_device_init_pools(struct kunit *test)154{155	struct ttm_test_devices *priv = test->priv;156	const struct ttm_device_test_case *params = test->param_value;157	struct ttm_device *ttm_dev;158	struct ttm_pool *pool;159	struct ttm_pool_type pt;160	int err;161 162	ttm_dev = kunit_kzalloc(test, sizeof(*ttm_dev), GFP_KERNEL);163	KUNIT_ASSERT_NOT_NULL(test, ttm_dev);164 165	err = ttm_device_kunit_init(priv, ttm_dev,166				    params->use_dma_alloc,167				    params->use_dma32);168	KUNIT_ASSERT_EQ(test, err, 0);169 170	pool = &ttm_dev->pool;171	KUNIT_ASSERT_NOT_NULL(test, pool);172	KUNIT_EXPECT_PTR_EQ(test, pool->dev, priv->dev);173	KUNIT_EXPECT_EQ(test, pool->use_dma_alloc, params->use_dma_alloc);174	KUNIT_EXPECT_EQ(test, pool->use_dma32, params->use_dma32);175 176	if (params->pools_init_expected) {177		for (int i = 0; i < TTM_NUM_CACHING_TYPES; ++i) {178			for (int j = 0; j < NR_PAGE_ORDERS; ++j) {179				pt = pool->caching[i].orders[j];180				KUNIT_EXPECT_PTR_EQ(test, pt.pool, pool);181				KUNIT_EXPECT_EQ(test, pt.caching, i);182				KUNIT_EXPECT_EQ(test, pt.order, j);183 184				if (params->use_dma_alloc)185					KUNIT_ASSERT_FALSE(test,186							   list_empty(&pt.pages));187			}188		}189	}190 191	ttm_device_fini(ttm_dev);192}193 194static struct kunit_case ttm_device_test_cases[] = {195	KUNIT_CASE(ttm_device_init_basic),196	KUNIT_CASE(ttm_device_init_multiple),197	KUNIT_CASE(ttm_device_fini_basic),198	KUNIT_CASE(ttm_device_init_no_vma_man),199	KUNIT_CASE_PARAM(ttm_device_init_pools, ttm_device_gen_params),200	{}201};202 203static struct kunit_suite ttm_device_test_suite = {204	.name = "ttm_device",205	.init = ttm_test_devices_init,206	.exit = ttm_test_devices_fini,207	.test_cases = ttm_device_test_cases,208};209 210kunit_test_suites(&ttm_device_test_suite);211 212MODULE_DESCRIPTION("KUnit tests for ttm_device APIs");213MODULE_LICENSE("GPL and additional rights");214