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
p2p_enabled(struct dma_buf_test_params * params)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
is_dynamic(struct dma_buf_test_params * params)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
check_residency(struct kunit * test,struct xe_bo * exported,struct xe_bo * imported,struct dma_buf * dmabuf)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. Note that the gem object dma_buf member isn't
61 * set from xe_gem_prime_export(), and it's needed for the move_notify()
62 * functionality, so hack that up here. Evicting the exported bo will
63 * evict also the imported bo through the move_notify() functionality if
64 * importer is on a different device. If they're on the same device,
65 * the exporter and the importer should be the same bo.
66 */
67 swap(exported->ttm.base.dma_buf, dmabuf);
68 ret = xe_bo_evict(exported, true);
69 swap(exported->ttm.base.dma_buf, dmabuf);
70 if (ret) {
71 if (ret != -EINTR && ret != -ERESTARTSYS)
72 KUNIT_FAIL(test, "Evicting exporter failed with err=%d.\n",
73 ret);
74 return;
75 }
76
77 /* Verify that also importer has been evicted to SYSTEM */
78 if (exported != imported && !xe_bo_is_mem_type(imported, XE_PL_SYSTEM)) {
79 KUNIT_FAIL(test, "Importer wasn't properly evicted.\n");
80 return;
81 }
82
83 /* Re-validate the importer. This should move also exporter in. */
84 ret = xe_bo_validate(imported, NULL, false);
85 if (ret) {
86 if (ret != -EINTR && ret != -ERESTARTSYS)
87 KUNIT_FAIL(test, "Validating importer failed with err=%d.\n",
88 ret);
89 return;
90 }
91
92 KUNIT_EXPECT_TRUE(test, xe_bo_is_mem_type(exported, mem_type));
93
94 if (params->force_different_devices)
95 KUNIT_EXPECT_TRUE(test, xe_bo_is_mem_type(imported, XE_PL_TT));
96 else
97 KUNIT_EXPECT_TRUE(test, exported == imported);
98 }
99
xe_test_dmabuf_import_same_driver(struct xe_device * xe)100 static void xe_test_dmabuf_import_same_driver(struct xe_device *xe)
101 {
102 struct kunit *test = kunit_get_current_test();
103 struct dma_buf_test_params *params = to_dma_buf_test_params(test->priv);
104 struct drm_gem_object *import;
105 struct dma_buf *dmabuf;
106 struct xe_bo *bo;
107 size_t size;
108
109 /* No VRAM on this device? */
110 if (!ttm_manager_type(&xe->ttm, XE_PL_VRAM0) &&
111 (params->mem_mask & XE_BO_FLAG_VRAM0))
112 return;
113
114 size = PAGE_SIZE;
115 if ((params->mem_mask & XE_BO_FLAG_VRAM0) &&
116 xe->info.vram_flags & XE_VRAM_FLAGS_NEED64K)
117 size = SZ_64K;
118
119 kunit_info(test, "running %s\n", __func__);
120 bo = xe_bo_create_user(xe, NULL, NULL, size, DRM_XE_GEM_CPU_CACHING_WC,
121 params->mem_mask);
122 if (IS_ERR(bo)) {
123 KUNIT_FAIL(test, "xe_bo_create() failed with err=%ld\n",
124 PTR_ERR(bo));
125 return;
126 }
127
128 dmabuf = xe_gem_prime_export(&bo->ttm.base, 0);
129 if (IS_ERR(dmabuf)) {
130 KUNIT_FAIL(test, "xe_gem_prime_export() failed with err=%ld\n",
131 PTR_ERR(dmabuf));
132 goto out;
133 }
134
135 import = xe_gem_prime_import(&xe->drm, dmabuf);
136 if (!IS_ERR(import)) {
137 struct xe_bo *import_bo = gem_to_xe_bo(import);
138
139 /*
140 * Did import succeed when it shouldn't due to lack of p2p support?
141 */
142 if (params->force_different_devices &&
143 !p2p_enabled(params) &&
144 !(params->mem_mask & XE_BO_FLAG_SYSTEM)) {
145 KUNIT_FAIL(test,
146 "xe_gem_prime_import() succeeded when it shouldn't have\n");
147 } else {
148 int err;
149
150 /* Is everything where we expect it to be? */
151 xe_bo_lock(import_bo, false);
152 err = xe_bo_validate(import_bo, NULL, false);
153
154 /* Pinning in VRAM is not allowed. */
155 if (!is_dynamic(params) &&
156 params->force_different_devices &&
157 !(params->mem_mask & XE_BO_FLAG_SYSTEM))
158 KUNIT_EXPECT_EQ(test, err, -EINVAL);
159 /* Otherwise only expect interrupts or success. */
160 else if (err && err != -EINTR && err != -ERESTARTSYS)
161 KUNIT_EXPECT_TRUE(test, !err || err == -EINTR ||
162 err == -ERESTARTSYS);
163
164 if (!err)
165 check_residency(test, bo, import_bo, dmabuf);
166 xe_bo_unlock(import_bo);
167 }
168 drm_gem_object_put(import);
169 } else if (PTR_ERR(import) != -EOPNOTSUPP) {
170 /* Unexpected error code. */
171 KUNIT_FAIL(test,
172 "xe_gem_prime_import failed with the wrong err=%ld\n",
173 PTR_ERR(import));
174 } else if (!params->force_different_devices ||
175 p2p_enabled(params) ||
176 (params->mem_mask & XE_BO_FLAG_SYSTEM)) {
177 /* Shouldn't fail if we can reuse same bo, use p2p or use system */
178 KUNIT_FAIL(test, "dynamic p2p attachment failed with err=%ld\n",
179 PTR_ERR(import));
180 }
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,
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 .attach_ops = &xe_dma_buf_attach_ops,
235 .force_different_devices = true},
236
237 {.mem_mask = XE_BO_FLAG_SYSTEM | XE_BO_FLAG_VRAM0,
238 .attach_ops = &nop2p_attach_ops},
239 {.mem_mask = XE_BO_FLAG_SYSTEM | XE_BO_FLAG_VRAM0,
240 .attach_ops = &nop2p_attach_ops,
241 .force_different_devices = true},
242
243 {.mem_mask = XE_BO_FLAG_SYSTEM | XE_BO_FLAG_VRAM0},
244 {.mem_mask = XE_BO_FLAG_SYSTEM | XE_BO_FLAG_VRAM0,
245 .force_different_devices = true},
246
247 {}
248 };
249
dma_buf_run_device(struct xe_device * xe)250 static int dma_buf_run_device(struct xe_device *xe)
251 {
252 const struct dma_buf_test_params *params;
253 struct kunit *test = kunit_get_current_test();
254
255 xe_pm_runtime_get(xe);
256 for (params = test_params; params->mem_mask; ++params) {
257 struct dma_buf_test_params p = *params;
258
259 p.base.id = XE_TEST_LIVE_DMA_BUF;
260 test->priv = &p;
261 xe_test_dmabuf_import_same_driver(xe);
262 }
263 xe_pm_runtime_put(xe);
264
265 /* A non-zero return would halt iteration over driver devices */
266 return 0;
267 }
268
xe_dma_buf_kunit(struct kunit * test)269 static void xe_dma_buf_kunit(struct kunit *test)
270 {
271 struct xe_device *xe = test->priv;
272
273 dma_buf_run_device(xe);
274 }
275
276 static struct kunit_case xe_dma_buf_tests[] = {
277 KUNIT_CASE_PARAM(xe_dma_buf_kunit, xe_pci_live_device_gen_param),
278 {}
279 };
280
281 VISIBLE_IF_KUNIT
282 struct kunit_suite xe_dma_buf_test_suite = {
283 .name = "xe_dma_buf",
284 .test_cases = xe_dma_buf_tests,
285 .init = xe_kunit_helper_xe_device_live_test_init,
286 };
287 EXPORT_SYMBOL_IF_KUNIT(xe_dma_buf_test_suite);
288