1 // SPDX-License-Identifier: GPL-2.0 AND MIT 2 /* 3 * Copyright © 2023 Intel Corporation 4 */ 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 11 struct ttm_device_test_case { 12 const char *description; 13 bool use_dma_alloc; 14 bool use_dma32; 15 bool pools_init_expected; 16 }; 17 18 static 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 47 static 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 74 static 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 97 static 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 } 118 119 static 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 }; 145 146 static 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 } 150 151 KUNIT_ARRAY_PARAM(ttm_device, ttm_device_cases, ttm_device_case_desc); 152 153 static 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 <= MAX_ORDER; ++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 } 193 194 static 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 }; 202 203 static 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 }; 209 210 kunit_test_suites(&ttm_device_test_suite); 211 212 MODULE_LICENSE("GPL"); 213