drivers/gpu/drm/i915/selftests/i915_gem_dmabuf.c

   1 /*
   2  * Copyright © 2016 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  *
  23  */
  24
  25 #include "../i915_selftest.h"
  26
  27 #include "mock_gem_device.h"
  28 #include "mock_dmabuf.h"
  29
  30 static int igt_dmabuf_export(void *arg)
  31 {
  32         struct drm_i915_private *i915 = arg;
  33         struct drm_i915_gem_object *obj;
  34         struct dma_buf *dmabuf;
  35
  36         obj = i915_gem_object_create(i915, PAGE_SIZE);
  37         if (IS_ERR(obj))
  38                 return PTR_ERR(obj);
  39
  40         dmabuf = i915_gem_prime_export(&i915->drm, &obj->base, 0);
  41         i915_gem_object_put(obj);
  42         if (IS_ERR(dmabuf)) {
  43                 pr_err("i915_gem_prime_export failed with err=%d\n",
  44                        (int)PTR_ERR(dmabuf));
  45                 return PTR_ERR(dmabuf);
  46         }
  47
  48         dma_buf_put(dmabuf);
  49         return 0;
  50 }
  51
  52 static int igt_dmabuf_import_self(void *arg)
  53 {
  54         struct drm_i915_private *i915 = arg;
  55         struct drm_i915_gem_object *obj;
  56         struct drm_gem_object *import;
  57         struct dma_buf *dmabuf;
  58         int err;
  59
  60         obj = i915_gem_object_create(i915, PAGE_SIZE);
  61         if (IS_ERR(obj))
  62                 return PTR_ERR(obj);
  63
  64         dmabuf = i915_gem_prime_export(&i915->drm, &obj->base, 0);
  65         if (IS_ERR(dmabuf)) {
  66                 pr_err("i915_gem_prime_export failed with err=%d\n",
  67                        (int)PTR_ERR(dmabuf));
  68                 err = PTR_ERR(dmabuf);
  69                 goto out;
  70         }
  71
  72         import = i915_gem_prime_import(&i915->drm, dmabuf);
  73         if (IS_ERR(import)) {
  74                 pr_err("i915_gem_prime_import failed with err=%d\n",
  75                        (int)PTR_ERR(import));
  76                 err = PTR_ERR(import);
  77                 goto out_dmabuf;
  78         }
  79
  80         if (import != &obj->base) {
  81                 pr_err("i915_gem_prime_import created a new object!\n");
  82                 err = -EINVAL;
  83                 goto out_import;
  84         }
  85
  86         err = 0;
  87 out_import:
  88         i915_gem_object_put(to_intel_bo(import));
  89 out_dmabuf:
  90         dma_buf_put(dmabuf);
  91 out:
  92         i915_gem_object_put(obj);
  93         return err;
  94 }
  95
  96 static int igt_dmabuf_import(void *arg)
  97 {
  98         struct drm_i915_private *i915 = arg;
  99         struct drm_i915_gem_object *obj;
 100         struct dma_buf *dmabuf;
 101         void *obj_map, *dma_map;
 102         u32 pattern[] = { 0, 0xaa, 0xcc, 0x55, 0xff };
 103         int err, i;
 104
 105         dmabuf = mock_dmabuf(1);
 106         if (IS_ERR(dmabuf))
 107                 return PTR_ERR(dmabuf);
 108
 109         obj = to_intel_bo(i915_gem_prime_import(&i915->drm, dmabuf));
 110         if (IS_ERR(obj)) {
 111                 pr_err("i915_gem_prime_import failed with err=%d\n",
 112                        (int)PTR_ERR(obj));
 113                 err = PTR_ERR(obj);
 114                 goto out_dmabuf;
 115         }
 116
 117         if (obj->base.dev != &i915->drm) {
 118                 pr_err("i915_gem_prime_import created a non-i915 object!\n");
 119                 err = -EINVAL;
 120                 goto out_obj;
 121         }
 122
 123         if (obj->base.size != PAGE_SIZE) {
 124                 pr_err("i915_gem_prime_import is wrong size found %lld, expected %ld\n",
 125                        (long long)obj->base.size, PAGE_SIZE);
 126                 err = -EINVAL;
 127                 goto out_obj;
 128         }
 129
 130         dma_map = dma_buf_vmap(dmabuf);
 131         if (!dma_map) {
 132                 pr_err("dma_buf_vmap failed\n");
 133                 err = -ENOMEM;
 134                 goto out_obj;
 135         }
 136
 137         if (0) { /* Can not yet map dmabuf */
 138                 obj_map = i915_gem_object_pin_map(obj, I915_MAP_WB);
 139                 if (IS_ERR(obj_map)) {
 140                         err = PTR_ERR(obj_map);
 141                         pr_err("i915_gem_object_pin_map failed with err=%d\n", err);
 142                         goto out_dma_map;
 143                 }
 144
 145                 for (i = 0; i < ARRAY_SIZE(pattern); i++) {
 146                         memset(dma_map, pattern[i], PAGE_SIZE);
 147                         if (memchr_inv(obj_map, pattern[i], PAGE_SIZE)) {
 148                                 err = -EINVAL;
 149                                 pr_err("imported vmap not all set to %x!\n", pattern[i]);
 150                                 i915_gem_object_unpin_map(obj);
 151                                 goto out_dma_map;
 152                         }
 153                 }
 154
 155                 for (i = 0; i < ARRAY_SIZE(pattern); i++) {
 156                         memset(obj_map, pattern[i], PAGE_SIZE);
 157                         if (memchr_inv(dma_map, pattern[i], PAGE_SIZE)) {
 158                                 err = -EINVAL;
 159                                 pr_err("exported vmap not all set to %x!\n", pattern[i]);
 160                                 i915_gem_object_unpin_map(obj);
 161                                 goto out_dma_map;
 162                         }
 163                 }
 164
 165                 i915_gem_object_unpin_map(obj);
 166         }
 167
 168         err = 0;
 169 out_dma_map:
 170         dma_buf_vunmap(dmabuf, dma_map);
 171 out_obj:
 172         i915_gem_object_put(obj);
 173 out_dmabuf:
 174         dma_buf_put(dmabuf);
 175         return err;
 176 }
 177
 178 static int igt_dmabuf_import_ownership(void *arg)
 179 {
 180         struct drm_i915_private *i915 = arg;
 181         struct drm_i915_gem_object *obj;
 182         struct dma_buf *dmabuf;
 183         void *ptr;
 184         int err;
 185
 186         dmabuf = mock_dmabuf(1);
 187         if (IS_ERR(dmabuf))
 188                 return PTR_ERR(dmabuf);
 189
 190         ptr = dma_buf_vmap(dmabuf);
 191         if (!ptr) {
 192                 pr_err("dma_buf_vmap failed\n");
 193                 err = -ENOMEM;
 194                 goto err_dmabuf;
 195         }
 196
 197         memset(ptr, 0xc5, PAGE_SIZE);
 198         dma_buf_vunmap(dmabuf, ptr);
 199
 200         obj = to_intel_bo(i915_gem_prime_import(&i915->drm, dmabuf));
 201         if (IS_ERR(obj)) {
 202                 pr_err("i915_gem_prime_import failed with err=%d\n",
 203                        (int)PTR_ERR(obj));
 204                 err = PTR_ERR(obj);
 205                 goto err_dmabuf;
 206         }
 207
 208         dma_buf_put(dmabuf);
 209
 210         err = i915_gem_object_pin_pages(obj);
 211         if (err) {
 212                 pr_err("i915_gem_object_pin_pages failed with err=%d\n", err);
 213                 goto out_obj;
 214         }
 215
 216         err = 0;
 217         i915_gem_object_unpin_pages(obj);
 218 out_obj:
 219         i915_gem_object_put(obj);
 220         return err;
 221
 222 err_dmabuf:
 223         dma_buf_put(dmabuf);
 224         return err;
 225 }
 226
 227 static int igt_dmabuf_export_vmap(void *arg)
 228 {
 229         struct drm_i915_private *i915 = arg;
 230         struct drm_i915_gem_object *obj;
 231         struct dma_buf *dmabuf;
 232         void *ptr;
 233         int err;
 234
 235         obj = i915_gem_object_create(i915, PAGE_SIZE);
 236         if (IS_ERR(obj))
 237                 return PTR_ERR(obj);
 238
 239         dmabuf = i915_gem_prime_export(&i915->drm, &obj->base, 0);
 240         if (IS_ERR(dmabuf)) {
 241                 pr_err("i915_gem_prime_export failed with err=%d\n",
 242                        (int)PTR_ERR(dmabuf));
 243                 err = PTR_ERR(dmabuf);
 244                 goto err_obj;
 245         }
 246         i915_gem_object_put(obj);
 247
 248         ptr = dma_buf_vmap(dmabuf);
 249         if (!ptr) {
 250                 pr_err("dma_buf_vmap failed\n");
 251                 err = -ENOMEM;
 252                 goto out;
 253         }
 254
 255         if (memchr_inv(ptr, 0, dmabuf->size)) {
 256                 pr_err("Exported object not initialiased to zero!\n");
 257                 err = -EINVAL;
 258                 goto out;
 259         }
 260
 261         memset(ptr, 0xc5, dmabuf->size);
 262
 263         err = 0;
 264         dma_buf_vunmap(dmabuf, ptr);
 265 out:
 266         dma_buf_put(dmabuf);
 267         return err;
 268
 269 err_obj:
 270         i915_gem_object_put(obj);
 271         return err;
 272 }
 273
 274 static int igt_dmabuf_export_kmap(void *arg)
 275 {
 276         struct drm_i915_private *i915 = arg;
 277         struct drm_i915_gem_object *obj;
 278         struct dma_buf *dmabuf;
 279         void *ptr;
 280         int err;
 281
 282         obj = i915_gem_object_create(i915, 2*PAGE_SIZE);
 283         if (IS_ERR(obj))
 284                 return PTR_ERR(obj);
 285
 286         dmabuf = i915_gem_prime_export(&i915->drm, &obj->base, 0);
 287         i915_gem_object_put(obj);
 288         if (IS_ERR(dmabuf)) {
 289                 err = PTR_ERR(dmabuf);
 290                 pr_err("i915_gem_prime_export failed with err=%d\n", err);
 291                 return err;
 292         }
 293
 294         ptr = dma_buf_kmap(dmabuf, 0);
 295         if (!ptr) {
 296                 pr_err("dma_buf_kmap failed\n");
 297                 err = -ENOMEM;
 298                 goto err;
 299         }
 300
 301         if (memchr_inv(ptr, 0, PAGE_SIZE)) {
 302                 dma_buf_kunmap(dmabuf, 0, ptr);
 303                 pr_err("Exported page[0] not initialiased to zero!\n");
 304                 err = -EINVAL;
 305                 goto err;
 306         }
 307
 308         memset(ptr, 0xc5, PAGE_SIZE);
 309         dma_buf_kunmap(dmabuf, 0, ptr);
 310
 311         ptr = i915_gem_object_pin_map(obj, I915_MAP_WB);
 312         if (IS_ERR(ptr)) {
 313                 err = PTR_ERR(ptr);
 314                 pr_err("i915_gem_object_pin_map failed with err=%d\n", err);
 315                 goto err;
 316         }
 317         memset(ptr + PAGE_SIZE, 0xaa, PAGE_SIZE);
 318         i915_gem_object_unpin_map(obj);
 319
 320         ptr = dma_buf_kmap(dmabuf, 1);
 321         if (!ptr) {
 322                 pr_err("dma_buf_kmap failed\n");
 323                 err = -ENOMEM;
 324                 goto err;
 325         }
 326
 327         if (memchr_inv(ptr, 0xaa, PAGE_SIZE)) {
 328                 dma_buf_kunmap(dmabuf, 1, ptr);
 329                 pr_err("Exported page[1] not set to 0xaa!\n");
 330                 err = -EINVAL;
 331                 goto err;
 332         }
 333
 334         memset(ptr, 0xc5, PAGE_SIZE);
 335         dma_buf_kunmap(dmabuf, 1, ptr);
 336
 337         ptr = dma_buf_kmap(dmabuf, 0);
 338         if (!ptr) {
 339                 pr_err("dma_buf_kmap failed\n");
 340                 err = -ENOMEM;
 341                 goto err;
 342         }
 343         if (memchr_inv(ptr, 0xc5, PAGE_SIZE)) {
 344                 dma_buf_kunmap(dmabuf, 0, ptr);
 345                 pr_err("Exported page[0] did not retain 0xc5!\n");
 346                 err = -EINVAL;
 347                 goto err;
 348         }
 349         dma_buf_kunmap(dmabuf, 0, ptr);
 350
 351         ptr = dma_buf_kmap(dmabuf, 2);
 352         if (ptr) {
 353                 pr_err("Erroneously kmapped beyond the end of the object!\n");
 354                 dma_buf_kunmap(dmabuf, 2, ptr);
 355                 err = -EINVAL;
 356                 goto err;
 357         }
 358
 359         ptr = dma_buf_kmap(dmabuf, -1);
 360         if (ptr) {
 361                 pr_err("Erroneously kmapped before the start of the object!\n");
 362                 dma_buf_kunmap(dmabuf, -1, ptr);
 363                 err = -EINVAL;
 364                 goto err;
 365         }
 366
 367         err = 0;
 368 err:
 369         dma_buf_put(dmabuf);
 370         return err;
 371 }
 372
 373 int i915_gem_dmabuf_mock_selftests(void)
 374 {
 375         static const struct i915_subtest tests[] = {
 376                 SUBTEST(igt_dmabuf_export),
 377                 SUBTEST(igt_dmabuf_import_self),
 378                 SUBTEST(igt_dmabuf_import),
 379                 SUBTEST(igt_dmabuf_import_ownership),
 380                 SUBTEST(igt_dmabuf_export_vmap),
 381                 SUBTEST(igt_dmabuf_export_kmap),
 382         };
 383         struct drm_i915_private *i915;
 384         int err;
 385
 386         i915 = mock_gem_device();
 387         if (!i915)
 388                 return -ENOMEM;
 389
 390         err = i915_subtests(tests, i915);
 391
 392         drm_dev_unref(&i915->drm);
 393         return err;
 394 }
 395
 396 int i915_gem_dmabuf_live_selftests(struct drm_i915_private *i915)
 397 {
 398         static const struct i915_subtest tests[] = {
 399                 SUBTEST(igt_dmabuf_export),
 400         };
 401
 402         return i915_subtests(tests, i915);
 403 }