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 struct drm_exec *exec) 32 { 33 struct dma_buf_test_params *params = to_dma_buf_test_params(test->priv); 34 u32 mem_type; 35 int ret; 36 37 xe_bo_assert_held(exported); 38 xe_bo_assert_held(imported); 39 40 mem_type = XE_PL_VRAM0; 41 if (!(params->mem_mask & XE_BO_FLAG_VRAM0)) 42 /* No VRAM allowed */ 43 mem_type = XE_PL_TT; 44 else if (params->force_different_devices && !p2p_enabled(params)) 45 /* No P2P */ 46 mem_type = XE_PL_TT; 47 else if (params->force_different_devices && !is_dynamic(params) && 48 (params->mem_mask & XE_BO_FLAG_SYSTEM)) 49 /* Pin migrated to TT */ 50 mem_type = XE_PL_TT; 51 52 if (!xe_bo_is_mem_type(exported, mem_type)) { 53 KUNIT_FAIL(test, "Exported bo was not in expected memory type.\n"); 54 return; 55 } 56 57 if (xe_bo_is_pinned(exported)) 58 return; 59 60 /* 61 * Evict exporter. Evicting the exported bo will 62 * evict also the imported bo through the move_notify() functionality if 63 * importer is on a different device. If they're on the same device, 64 * the exporter and the importer should be the same bo. 65 */ 66 ret = xe_bo_evict(exported, exec); 67 if (ret) { 68 if (ret != -EINTR && ret != -ERESTARTSYS) 69 KUNIT_FAIL(test, "Evicting exporter failed with err=%d.\n", 70 ret); 71 return; 72 } 73 74 /* Verify that also importer has been evicted to SYSTEM */ 75 if (exported != imported && !xe_bo_is_mem_type(imported, XE_PL_SYSTEM)) { 76 KUNIT_FAIL(test, "Importer wasn't properly evicted.\n"); 77 return; 78 } 79 80 /* Re-validate the importer. This should move also exporter in. */ 81 ret = xe_bo_validate(imported, NULL, false, exec); 82 if (ret) { 83 if (ret != -EINTR && ret != -ERESTARTSYS) 84 KUNIT_FAIL(test, "Validating importer failed with err=%d.\n", 85 ret); 86 return; 87 } 88 89 KUNIT_EXPECT_TRUE(test, xe_bo_is_mem_type(exported, mem_type)); 90 91 if (params->force_different_devices) 92 KUNIT_EXPECT_TRUE(test, xe_bo_is_mem_type(imported, XE_PL_TT)); 93 else 94 KUNIT_EXPECT_TRUE(test, exported == imported); 95 } 96 97 static void xe_test_dmabuf_import_same_driver(struct xe_device *xe) 98 { 99 struct kunit *test = kunit_get_current_test(); 100 struct dma_buf_test_params *params = to_dma_buf_test_params(test->priv); 101 struct drm_gem_object *import; 102 struct dma_buf *dmabuf; 103 struct xe_bo *bo; 104 size_t size; 105 106 /* No VRAM on this device? */ 107 if (!ttm_manager_type(&xe->ttm, XE_PL_VRAM0) && 108 (params->mem_mask & XE_BO_FLAG_VRAM0)) 109 return; 110 111 size = PAGE_SIZE; 112 if ((params->mem_mask & XE_BO_FLAG_VRAM0) && 113 xe->info.vram_flags & XE_VRAM_FLAGS_NEED64K) 114 size = SZ_64K; 115 116 kunit_info(test, "running %s\n", __func__); 117 bo = xe_bo_create_user(xe, NULL, size, DRM_XE_GEM_CPU_CACHING_WC, 118 params->mem_mask, NULL); 119 if (IS_ERR(bo)) { 120 KUNIT_FAIL(test, "xe_bo_create() failed with err=%ld\n", 121 PTR_ERR(bo)); 122 return; 123 } 124 125 dmabuf = xe_gem_prime_export(&bo->ttm.base, 0); 126 if (IS_ERR(dmabuf)) { 127 KUNIT_FAIL(test, "xe_gem_prime_export() failed with err=%ld\n", 128 PTR_ERR(dmabuf)); 129 goto out; 130 } 131 bo->ttm.base.dma_buf = dmabuf; 132 133 import = xe_gem_prime_import(&xe->drm, dmabuf); 134 if (!IS_ERR(import)) { 135 struct xe_bo *import_bo = gem_to_xe_bo(import); 136 137 /* 138 * Did import succeed when it shouldn't due to lack of p2p support? 139 */ 140 if (params->force_different_devices && 141 !p2p_enabled(params) && 142 !(params->mem_mask & XE_BO_FLAG_SYSTEM)) { 143 KUNIT_FAIL(test, 144 "xe_gem_prime_import() succeeded when it shouldn't have\n"); 145 } else { 146 struct drm_exec *exec = XE_VALIDATION_OPT_OUT; 147 int err; 148 149 /* Is everything where we expect it to be? */ 150 xe_bo_lock(import_bo, false); 151 err = xe_bo_validate(import_bo, NULL, false, exec); 152 153 /* Pinning in VRAM is not allowed. */ 154 if (!is_dynamic(params) && 155 params->force_different_devices && 156 !(params->mem_mask & XE_BO_FLAG_SYSTEM)) 157 KUNIT_EXPECT_EQ(test, err, -EINVAL); 158 /* Otherwise only expect interrupts or success. */ 159 else if (err && err != -EINTR && err != -ERESTARTSYS) 160 KUNIT_EXPECT_TRUE(test, !err || err == -EINTR || 161 err == -ERESTARTSYS); 162 163 if (!err) 164 check_residency(test, bo, import_bo, dmabuf, exec); 165 xe_bo_unlock(import_bo); 166 } 167 drm_gem_object_put(import); 168 } else if (PTR_ERR(import) != -EOPNOTSUPP) { 169 /* Unexpected error code. */ 170 KUNIT_FAIL(test, 171 "xe_gem_prime_import failed with the wrong err=%ld\n", 172 PTR_ERR(import)); 173 } else if (!params->force_different_devices || 174 p2p_enabled(params) || 175 (params->mem_mask & XE_BO_FLAG_SYSTEM)) { 176 /* Shouldn't fail if we can reuse same bo, use p2p or use system */ 177 KUNIT_FAIL(test, "dynamic p2p attachment failed with err=%ld\n", 178 PTR_ERR(import)); 179 } 180 bo->ttm.base.dma_buf = NULL; 181 dma_buf_put(dmabuf); 182 out: 183 drm_gem_object_put(&bo->ttm.base); 184 } 185 186 static const struct dma_buf_attach_ops nop2p_attach_ops = { 187 .allow_peer2peer = false, 188 .move_notify = xe_dma_buf_move_notify 189 }; 190 191 /* 192 * We test the implementation with bos of different residency and with 193 * importers with different capabilities; some lacking p2p support and some 194 * lacking dynamic capabilities (attach_ops == NULL). We also fake 195 * different devices avoiding the import shortcut that just reuses the same 196 * gem object. 197 */ 198 static const struct dma_buf_test_params test_params[] = { 199 {.mem_mask = XE_BO_FLAG_VRAM0, 200 .attach_ops = &xe_dma_buf_attach_ops}, 201 {.mem_mask = XE_BO_FLAG_VRAM0 | XE_BO_FLAG_NEEDS_CPU_ACCESS, 202 .attach_ops = &xe_dma_buf_attach_ops, 203 .force_different_devices = true}, 204 205 {.mem_mask = XE_BO_FLAG_VRAM0, 206 .attach_ops = &nop2p_attach_ops}, 207 {.mem_mask = XE_BO_FLAG_VRAM0, 208 .attach_ops = &nop2p_attach_ops, 209 .force_different_devices = true}, 210 211 {.mem_mask = XE_BO_FLAG_VRAM0}, 212 {.mem_mask = XE_BO_FLAG_VRAM0, 213 .force_different_devices = true}, 214 215 {.mem_mask = XE_BO_FLAG_SYSTEM, 216 .attach_ops = &xe_dma_buf_attach_ops}, 217 {.mem_mask = XE_BO_FLAG_SYSTEM, 218 .attach_ops = &xe_dma_buf_attach_ops, 219 .force_different_devices = true}, 220 221 {.mem_mask = XE_BO_FLAG_SYSTEM, 222 .attach_ops = &nop2p_attach_ops}, 223 {.mem_mask = XE_BO_FLAG_SYSTEM, 224 .attach_ops = &nop2p_attach_ops, 225 .force_different_devices = true}, 226 227 {.mem_mask = XE_BO_FLAG_SYSTEM}, 228 {.mem_mask = XE_BO_FLAG_SYSTEM, 229 .force_different_devices = true}, 230 231 {.mem_mask = XE_BO_FLAG_SYSTEM | XE_BO_FLAG_VRAM0, 232 .attach_ops = &xe_dma_buf_attach_ops}, 233 {.mem_mask = XE_BO_FLAG_SYSTEM | XE_BO_FLAG_VRAM0 | 234 XE_BO_FLAG_NEEDS_CPU_ACCESS, 235 .attach_ops = &xe_dma_buf_attach_ops, 236 .force_different_devices = true}, 237 238 {.mem_mask = XE_BO_FLAG_SYSTEM | XE_BO_FLAG_VRAM0, 239 .attach_ops = &nop2p_attach_ops}, 240 {.mem_mask = XE_BO_FLAG_SYSTEM | XE_BO_FLAG_VRAM0, 241 .attach_ops = &nop2p_attach_ops, 242 .force_different_devices = true}, 243 244 {.mem_mask = XE_BO_FLAG_SYSTEM | XE_BO_FLAG_VRAM0}, 245 {.mem_mask = XE_BO_FLAG_SYSTEM | XE_BO_FLAG_VRAM0, 246 .force_different_devices = true}, 247 248 {} 249 }; 250 251 static int dma_buf_run_device(struct xe_device *xe) 252 { 253 const struct dma_buf_test_params *params; 254 struct kunit *test = kunit_get_current_test(); 255 256 xe_pm_runtime_get(xe); 257 for (params = test_params; params->mem_mask; ++params) { 258 struct dma_buf_test_params p = *params; 259 260 p.base.id = XE_TEST_LIVE_DMA_BUF; 261 test->priv = &p; 262 xe_test_dmabuf_import_same_driver(xe); 263 } 264 xe_pm_runtime_put(xe); 265 266 /* A non-zero return would halt iteration over driver devices */ 267 return 0; 268 } 269 270 static void xe_dma_buf_kunit(struct kunit *test) 271 { 272 struct xe_device *xe = test->priv; 273 274 dma_buf_run_device(xe); 275 } 276 277 static struct kunit_case xe_dma_buf_tests[] = { 278 KUNIT_CASE_PARAM(xe_dma_buf_kunit, xe_pci_live_device_gen_param), 279 {} 280 }; 281 282 VISIBLE_IF_KUNIT 283 struct kunit_suite xe_dma_buf_test_suite = { 284 .name = "xe_dma_buf", 285 .test_cases = xe_dma_buf_tests, 286 .init = xe_kunit_helper_xe_device_live_test_init, 287 }; 288 EXPORT_SYMBOL_IF_KUNIT(xe_dma_buf_test_suite); 289