1 // SPDX-License-Identifier: GPL-2.0 AND MIT 2 /* 3 * Copyright © 2022 Intel Corporation 4 */ 5 6 #include <uapi/drm/xe_drm.h> 7 8 #include <kunit/test.h> 9 #include <kunit/visibility.h> 10 11 #include "tests/xe_kunit_helpers.h" 12 #include "tests/xe_pci_test.h" 13 14 #include "xe_pci.h" 15 #include "xe_pm.h" 16 17 static bool p2p_enabled(struct dma_buf_test_params *params) 18 { 19 return IS_ENABLED(CONFIG_PCI_P2PDMA) && params->attach_ops && 20 params->attach_ops->allow_peer2peer; 21 } 22 23 static bool is_dynamic(struct dma_buf_test_params *params) 24 { 25 return IS_ENABLED(CONFIG_DMABUF_MOVE_NOTIFY) && params->attach_ops && 26 params->attach_ops->move_notify; 27 } 28 29 static void check_residency(struct kunit *test, struct xe_bo *exported, 30 struct xe_bo *imported, struct dma_buf *dmabuf) 31 { 32 struct dma_buf_test_params *params = to_dma_buf_test_params(test->priv); 33 u32 mem_type; 34 int ret; 35 36 xe_bo_assert_held(exported); 37 xe_bo_assert_held(imported); 38 39 mem_type = XE_PL_VRAM0; 40 if (!(params->mem_mask & XE_BO_FLAG_VRAM0)) 41 /* No VRAM allowed */ 42 mem_type = XE_PL_TT; 43 else if (params->force_different_devices && !p2p_enabled(params)) 44 /* No P2P */ 45 mem_type = XE_PL_TT; 46 else if (params->force_different_devices && !is_dynamic(params) && 47 (params->mem_mask & XE_BO_FLAG_SYSTEM)) 48 /* Pin migrated to TT */ 49 mem_type = XE_PL_TT; 50 51 if (!xe_bo_is_mem_type(exported, mem_type)) { 52 KUNIT_FAIL(test, "Exported bo was not in expected memory type.\n"); 53 return; 54 } 55 56 if (xe_bo_is_pinned(exported)) 57 return; 58 59 /* 60 * Evict exporter. Evicting the exported bo will 61 * evict also the imported bo through the move_notify() functionality if 62 * importer is on a different device. If they're on the same device, 63 * the exporter and the importer should be the same bo. 64 */ 65 ret = xe_bo_evict(exported); 66 if (ret) { 67 if (ret != -EINTR && ret != -ERESTARTSYS) 68 KUNIT_FAIL(test, "Evicting exporter failed with err=%d.\n", 69 ret); 70 return; 71 } 72 73 /* Verify that also importer has been evicted to SYSTEM */ 74 if (exported != imported && !xe_bo_is_mem_type(imported, XE_PL_SYSTEM)) { 75 KUNIT_FAIL(test, "Importer wasn't properly evicted.\n"); 76 return; 77 } 78 79 /* Re-validate the importer. This should move also exporter in. */ 80 ret = xe_bo_validate(imported, NULL, false); 81 if (ret) { 82 if (ret != -EINTR && ret != -ERESTARTSYS) 83 KUNIT_FAIL(test, "Validating importer failed with err=%d.\n", 84 ret); 85 return; 86 } 87 88 KUNIT_EXPECT_TRUE(test, xe_bo_is_mem_type(exported, mem_type)); 89 90 if (params->force_different_devices) 91 KUNIT_EXPECT_TRUE(test, xe_bo_is_mem_type(imported, XE_PL_TT)); 92 else 93 KUNIT_EXPECT_TRUE(test, exported == imported); 94 } 95 96 static void xe_test_dmabuf_import_same_driver(struct xe_device *xe) 97 { 98 struct kunit *test = kunit_get_current_test(); 99 struct dma_buf_test_params *params = to_dma_buf_test_params(test->priv); 100 struct drm_gem_object *import; 101 struct dma_buf *dmabuf; 102 struct xe_bo *bo; 103 size_t size; 104 105 /* No VRAM on this device? */ 106 if (!ttm_manager_type(&xe->ttm, XE_PL_VRAM0) && 107 (params->mem_mask & XE_BO_FLAG_VRAM0)) 108 return; 109 110 size = PAGE_SIZE; 111 if ((params->mem_mask & XE_BO_FLAG_VRAM0) && 112 xe->info.vram_flags & XE_VRAM_FLAGS_NEED64K) 113 size = SZ_64K; 114 115 kunit_info(test, "running %s\n", __func__); 116 bo = xe_bo_create_user(xe, NULL, NULL, size, DRM_XE_GEM_CPU_CACHING_WC, 117 params->mem_mask); 118 if (IS_ERR(bo)) { 119 KUNIT_FAIL(test, "xe_bo_create() failed with err=%ld\n", 120 PTR_ERR(bo)); 121 return; 122 } 123 124 dmabuf = xe_gem_prime_export(&bo->ttm.base, 0); 125 if (IS_ERR(dmabuf)) { 126 KUNIT_FAIL(test, "xe_gem_prime_export() failed with err=%ld\n", 127 PTR_ERR(dmabuf)); 128 goto out; 129 } 130 bo->ttm.base.dma_buf = dmabuf; 131 132 import = xe_gem_prime_import(&xe->drm, dmabuf); 133 if (!IS_ERR(import)) { 134 struct xe_bo *import_bo = gem_to_xe_bo(import); 135 136 /* 137 * Did import succeed when it shouldn't due to lack of p2p support? 138 */ 139 if (params->force_different_devices && 140 !p2p_enabled(params) && 141 !(params->mem_mask & XE_BO_FLAG_SYSTEM)) { 142 KUNIT_FAIL(test, 143 "xe_gem_prime_import() succeeded when it shouldn't have\n"); 144 } else { 145 int err; 146 147 /* Is everything where we expect it to be? */ 148 xe_bo_lock(import_bo, false); 149 err = xe_bo_validate(import_bo, NULL, false); 150 151 /* Pinning in VRAM is not allowed. */ 152 if (!is_dynamic(params) && 153 params->force_different_devices && 154 !(params->mem_mask & XE_BO_FLAG_SYSTEM)) 155 KUNIT_EXPECT_EQ(test, err, -EINVAL); 156 /* Otherwise only expect interrupts or success. */ 157 else if (err && err != -EINTR && err != -ERESTARTSYS) 158 KUNIT_EXPECT_TRUE(test, !err || err == -EINTR || 159 err == -ERESTARTSYS); 160 161 if (!err) 162 check_residency(test, bo, import_bo, dmabuf); 163 xe_bo_unlock(import_bo); 164 } 165 drm_gem_object_put(import); 166 } else if (PTR_ERR(import) != -EOPNOTSUPP) { 167 /* Unexpected error code. */ 168 KUNIT_FAIL(test, 169 "xe_gem_prime_import failed with the wrong err=%ld\n", 170 PTR_ERR(import)); 171 } else if (!params->force_different_devices || 172 p2p_enabled(params) || 173 (params->mem_mask & XE_BO_FLAG_SYSTEM)) { 174 /* Shouldn't fail if we can reuse same bo, use p2p or use system */ 175 KUNIT_FAIL(test, "dynamic p2p attachment failed with err=%ld\n", 176 PTR_ERR(import)); 177 } 178 bo->ttm.base.dma_buf = NULL; 179 dma_buf_put(dmabuf); 180 out: 181 drm_gem_object_put(&bo->ttm.base); 182 } 183 184 static const struct dma_buf_attach_ops nop2p_attach_ops = { 185 .allow_peer2peer = false, 186 .move_notify = xe_dma_buf_move_notify 187 }; 188 189 /* 190 * We test the implementation with bos of different residency and with 191 * importers with different capabilities; some lacking p2p support and some 192 * lacking dynamic capabilities (attach_ops == NULL). We also fake 193 * different devices avoiding the import shortcut that just reuses the same 194 * gem object. 195 */ 196 static const struct dma_buf_test_params test_params[] = { 197 {.mem_mask = XE_BO_FLAG_VRAM0, 198 .attach_ops = &xe_dma_buf_attach_ops}, 199 {.mem_mask = XE_BO_FLAG_VRAM0 | XE_BO_FLAG_NEEDS_CPU_ACCESS, 200 .attach_ops = &xe_dma_buf_attach_ops, 201 .force_different_devices = true}, 202 203 {.mem_mask = XE_BO_FLAG_VRAM0, 204 .attach_ops = &nop2p_attach_ops}, 205 {.mem_mask = XE_BO_FLAG_VRAM0, 206 .attach_ops = &nop2p_attach_ops, 207 .force_different_devices = true}, 208 209 {.mem_mask = XE_BO_FLAG_VRAM0}, 210 {.mem_mask = XE_BO_FLAG_VRAM0, 211 .force_different_devices = true}, 212 213 {.mem_mask = XE_BO_FLAG_SYSTEM, 214 .attach_ops = &xe_dma_buf_attach_ops}, 215 {.mem_mask = XE_BO_FLAG_SYSTEM, 216 .attach_ops = &xe_dma_buf_attach_ops, 217 .force_different_devices = true}, 218 219 {.mem_mask = XE_BO_FLAG_SYSTEM, 220 .attach_ops = &nop2p_attach_ops}, 221 {.mem_mask = XE_BO_FLAG_SYSTEM, 222 .attach_ops = &nop2p_attach_ops, 223 .force_different_devices = true}, 224 225 {.mem_mask = XE_BO_FLAG_SYSTEM}, 226 {.mem_mask = XE_BO_FLAG_SYSTEM, 227 .force_different_devices = true}, 228 229 {.mem_mask = XE_BO_FLAG_SYSTEM | XE_BO_FLAG_VRAM0, 230 .attach_ops = &xe_dma_buf_attach_ops}, 231 {.mem_mask = XE_BO_FLAG_SYSTEM | XE_BO_FLAG_VRAM0 | 232 XE_BO_FLAG_NEEDS_CPU_ACCESS, 233 .attach_ops = &xe_dma_buf_attach_ops, 234 .force_different_devices = true}, 235 236 {.mem_mask = XE_BO_FLAG_SYSTEM | XE_BO_FLAG_VRAM0, 237 .attach_ops = &nop2p_attach_ops}, 238 {.mem_mask = XE_BO_FLAG_SYSTEM | XE_BO_FLAG_VRAM0, 239 .attach_ops = &nop2p_attach_ops, 240 .force_different_devices = true}, 241 242 {.mem_mask = XE_BO_FLAG_SYSTEM | XE_BO_FLAG_VRAM0}, 243 {.mem_mask = XE_BO_FLAG_SYSTEM | XE_BO_FLAG_VRAM0, 244 .force_different_devices = true}, 245 246 {} 247 }; 248 249 static int dma_buf_run_device(struct xe_device *xe) 250 { 251 const struct dma_buf_test_params *params; 252 struct kunit *test = kunit_get_current_test(); 253 254 xe_pm_runtime_get(xe); 255 for (params = test_params; params->mem_mask; ++params) { 256 struct dma_buf_test_params p = *params; 257 258 p.base.id = XE_TEST_LIVE_DMA_BUF; 259 test->priv = &p; 260 xe_test_dmabuf_import_same_driver(xe); 261 } 262 xe_pm_runtime_put(xe); 263 264 /* A non-zero return would halt iteration over driver devices */ 265 return 0; 266 } 267 268 static void xe_dma_buf_kunit(struct kunit *test) 269 { 270 struct xe_device *xe = test->priv; 271 272 dma_buf_run_device(xe); 273 } 274 275 static struct kunit_case xe_dma_buf_tests[] = { 276 KUNIT_CASE_PARAM(xe_dma_buf_kunit, xe_pci_live_device_gen_param), 277 {} 278 }; 279 280 VISIBLE_IF_KUNIT 281 struct kunit_suite xe_dma_buf_test_suite = { 282 .name = "xe_dma_buf", 283 .test_cases = xe_dma_buf_tests, 284 .init = xe_kunit_helper_xe_device_live_test_init, 285 }; 286 EXPORT_SYMBOL_IF_KUNIT(xe_dma_buf_test_suite); 287