drv.c

   1 /*
   2  * Copyright 2016 The Chromium OS Authors. All rights reserved.
   3  * Use of this source code is governed by a BSD-style license that can be
   4  * found in the LICENSE file.
   5  */
   6 #include <assert.h>
   7 #include <errno.h>
   8 #include <fcntl.h>
   9 #include <pthread.h>
  10 #include <stdint.h>
  11 #include <stdio.h>
  12 #include <stdlib.h>
  13 #include <string.h>
  14 #include <sys/mman.h>
  15 #include <sys/types.h>
  16 #include <unistd.h>
  17 #include <xf86drm.h>
  18
  19 #ifdef __ANDROID__
  20 #include <cutils/log.h>
  21 #include <libgen.h>
  22 #endif
  23
  24 #include "drv_priv.h"
  25 #include "helpers.h"
  26 #include "util.h"
  27
  28 #ifdef DRV_AMDGPU
  29 extern const struct backend backend_amdgpu;
  30 #endif
  31 extern const struct backend backend_evdi;
  32 #ifdef DRV_EXYNOS
  33 extern const struct backend backend_exynos;
  34 #endif
  35 #ifdef DRV_I915
  36 extern const struct backend backend_i915;
  37 #endif
  38 #ifdef DRV_MARVELL
  39 extern const struct backend backend_marvell;
  40 #endif
  41 #ifdef DRV_MEDIATEK
  42 extern const struct backend backend_mediatek;
  43 #endif
  44 #ifdef DRV_MESON
  45 extern const struct backend backend_meson;
  46 #endif
  47 #ifdef DRV_MSM
  48 extern const struct backend backend_msm;
  49 #endif
  50 extern const struct backend backend_nouveau;
  51 #ifdef DRV_RADEON
  52 extern const struct backend backend_radeon;
  53 #endif
  54 #ifdef DRV_ROCKCHIP
  55 extern const struct backend backend_rockchip;
  56 #endif
  57 #ifdef DRV_SYNAPTICS
  58 extern const struct backend backend_synaptics;
  59 #endif
  60 #ifdef DRV_TEGRA
  61 extern const struct backend backend_tegra;
  62 #endif
  63 extern const struct backend backend_udl;
  64 #ifdef DRV_VC4
  65 extern const struct backend backend_vc4;
  66 #endif
  67 extern const struct backend backend_vgem;
  68 extern const struct backend backend_virtio_gpu;
  69
  70 static const struct backend *drv_get_backend(int fd)
  71 {
  72         drmVersionPtr drm_version;
  73         unsigned int i;
  74
  75         drm_version = drmGetVersion(fd);
  76
  77         if (!drm_version)
  78                 return NULL;
  79
  80         const struct backend *backend_list[] = {
  81 #ifdef DRV_AMDGPU
  82                 &backend_amdgpu,
  83 #endif
  84                 &backend_evdi,
  85 #ifdef DRV_EXYNOS
  86                 &backend_exynos,
  87 #endif
  88 #ifdef DRV_I915
  89                 &backend_i915,
  90 #endif
  91 #ifdef DRV_MARVELL
  92                 &backend_marvell,
  93 #endif
  94 #ifdef DRV_MEDIATEK
  95                 &backend_mediatek,
  96 #endif
  97 #ifdef DRV_MESON
  98                 &backend_meson,
  99 #endif
 100 #ifdef DRV_MSM
 101                 &backend_msm,
 102 #endif
 103                 &backend_nouveau,
 104 #ifdef DRV_RADEON
 105                 &backend_radeon,
 106 #endif
 107 #ifdef DRV_ROCKCHIP
 108                 &backend_rockchip,
 109 #endif
 110 #ifdef DRV_SYNAPTICS
 111                 &backend_synaptics,
 112 #endif
 113 #ifdef DRV_TEGRA
 114                 &backend_tegra,
 115 #endif
 116                 &backend_udl,
 117 #ifdef DRV_VC4
 118                 &backend_vc4,
 119 #endif
 120                 &backend_vgem,      &backend_virtio_gpu,
 121         };
 122
 123         for (i = 0; i < ARRAY_SIZE(backend_list); i++) {
 124                 const struct backend *b = backend_list[i];
 125                 // Exactly one of the main create functions must be defined.
 126                 assert((b->bo_create != NULL) ^ (b->bo_create_from_metadata != NULL));
 127                 // Either both or neither must be implemented.
 128                 assert((b->bo_compute_metadata != NULL) == (b->bo_create_from_metadata != NULL));
 129                 // Both can't be defined, but it's okay for neither to be (i.e. only bo_create).
 130                 assert((b->bo_create_with_modifiers == NULL) ||
 131                        (b->bo_create_from_metadata == NULL));
 132
 133                 if (!strcmp(drm_version->name, b->name)) {
 134                         drmFreeVersion(drm_version);
 135                         return b;
 136                 }
 137         }
 138
 139         drmFreeVersion(drm_version);
 140         return NULL;
 141 }
 142
 143 struct driver *drv_create(int fd)
 144 {
 145         struct driver *drv;
 146         int ret;
 147
 148         drv = (struct driver *)calloc(1, sizeof(*drv));
 149
 150         if (!drv)
 151                 return NULL;
 152
 153         drv->fd = fd;
 154         drv->backend = drv_get_backend(fd);
 155
 156         if (!drv->backend)
 157                 goto free_driver;
 158
 159         if (pthread_mutex_init(&drv->driver_lock, NULL))
 160                 goto free_driver;
 161
 162         drv->buffer_table = drmHashCreate();
 163         if (!drv->buffer_table)
 164                 goto free_lock;
 165
 166         drv->mappings = drv_array_init(sizeof(struct mapping));
 167         if (!drv->mappings)
 168                 goto free_buffer_table;
 169
 170         drv->combos = drv_array_init(sizeof(struct combination));
 171         if (!drv->combos)
 172                 goto free_mappings;
 173
 174         if (drv->backend->init) {
 175                 ret = drv->backend->init(drv);
 176                 if (ret) {
 177                         drv_array_destroy(drv->combos);
 178                         goto free_mappings;
 179                 }
 180         }
 181
 182         return drv;
 183
 184 free_mappings:
 185         drv_array_destroy(drv->mappings);
 186 free_buffer_table:
 187         drmHashDestroy(drv->buffer_table);
 188 free_lock:
 189         pthread_mutex_destroy(&drv->driver_lock);
 190 free_driver:
 191         free(drv);
 192         return NULL;
 193 }
 194
 195 void drv_destroy(struct driver *drv)
 196 {
 197         pthread_mutex_lock(&drv->driver_lock);
 198
 199         if (drv->backend->close)
 200                 drv->backend->close(drv);
 201
 202         drmHashDestroy(drv->buffer_table);
 203         drv_array_destroy(drv->mappings);
 204         drv_array_destroy(drv->combos);
 205
 206         pthread_mutex_unlock(&drv->driver_lock);
 207         pthread_mutex_destroy(&drv->driver_lock);
 208
 209         free(drv);
 210 }
 211
 212 int drv_get_fd(struct driver *drv)
 213 {
 214         return drv->fd;
 215 }
 216
 217 const char *drv_get_name(struct driver *drv)
 218 {
 219         return drv->backend->name;
 220 }
 221
 222 struct combination *drv_get_combination(struct driver *drv, uint32_t format, uint64_t use_flags)
 223 {
 224         struct combination *curr, *best;
 225
 226         if (format == DRM_FORMAT_NONE || use_flags == BO_USE_NONE)
 227                 return 0;
 228
 229         best = NULL;
 230         uint32_t i;
 231         for (i = 0; i < drv_array_size(drv->combos); i++) {
 232                 curr = drv_array_at_idx(drv->combos, i);
 233                 if ((format == curr->format) && use_flags == (curr->use_flags & use_flags))
 234                         if (!best || best->metadata.priority < curr->metadata.priority)
 235                                 best = curr;
 236         }
 237
 238         return best;
 239 }
 240
 241 struct bo *drv_bo_new(struct driver *drv, uint32_t width, uint32_t height, uint32_t format,
 242                       uint64_t use_flags, bool is_test_buffer)
 243 {
 244
 245         struct bo *bo;
 246         bo = (struct bo *)calloc(1, sizeof(*bo));
 247
 248         if (!bo)
 249                 return NULL;
 250
 251         bo->drv = drv;
 252         bo->meta.width = width;
 253         bo->meta.height = height;
 254         bo->meta.format = format;
 255         bo->meta.use_flags = use_flags;
 256         bo->meta.num_planes = drv_num_planes_from_format(format);
 257         bo->is_test_buffer = is_test_buffer;
 258
 259         if (!bo->meta.num_planes) {
 260                 free(bo);
 261                 return NULL;
 262         }
 263
 264         return bo;
 265 }
 266
 267 struct bo *drv_bo_create(struct driver *drv, uint32_t width, uint32_t height, uint32_t format,
 268                          uint64_t use_flags)
 269 {
 270         int ret;
 271         size_t plane;
 272         struct bo *bo;
 273         bool is_test_alloc;
 274
 275         is_test_alloc = use_flags & BO_USE_TEST_ALLOC;
 276         use_flags &= ~BO_USE_TEST_ALLOC;
 277
 278         bo = drv_bo_new(drv, width, height, format, use_flags, is_test_alloc);
 279
 280         if (!bo)
 281                 return NULL;
 282
 283         ret = -EINVAL;
 284         if (drv->backend->bo_compute_metadata) {
 285                 ret = drv->backend->bo_compute_metadata(bo, width, height, format, use_flags, NULL,
 286                                                         0);
 287                 if (!is_test_alloc && ret == 0)
 288                         ret = drv->backend->bo_create_from_metadata(bo);
 289         } else if (!is_test_alloc) {
 290                 ret = drv->backend->bo_create(bo, width, height, format, use_flags);
 291         }
 292
 293         if (ret) {
 294                 free(bo);
 295                 return NULL;
 296         }
 297
 298         pthread_mutex_lock(&drv->driver_lock);
 299
 300         for (plane = 0; plane < bo->meta.num_planes; plane++) {
 301                 if (plane > 0)
 302                         assert(bo->meta.offsets[plane] >= bo->meta.offsets[plane - 1]);
 303
 304                 drv_increment_reference_count(drv, bo, plane);
 305         }
 306
 307         pthread_mutex_unlock(&drv->driver_lock);
 308
 309         return bo;
 310 }
 311
 312 struct bo *drv_bo_create_with_modifiers(struct driver *drv, uint32_t width, uint32_t height,
 313                                         uint32_t format, const uint64_t *modifiers, uint32_t count)
 314 {
 315         int ret;
 316         size_t plane;
 317         struct bo *bo;
 318
 319         if (!drv->backend->bo_create_with_modifiers && !drv->backend->bo_compute_metadata) {
 320                 errno = ENOENT;
 321                 return NULL;
 322         }
 323
 324         bo = drv_bo_new(drv, width, height, format, BO_USE_NONE, false);
 325
 326         if (!bo)
 327                 return NULL;
 328
 329         ret = -EINVAL;
 330         if (drv->backend->bo_compute_metadata) {
 331                 ret = drv->backend->bo_compute_metadata(bo, width, height, format, BO_USE_NONE,
 332                                                         modifiers, count);
 333                 if (ret == 0)
 334                         ret = drv->backend->bo_create_from_metadata(bo);
 335         } else {
 336                 ret = drv->backend->bo_create_with_modifiers(bo, width, height, format, modifiers,
 337                                                              count);
 338         }
 339
 340         if (ret) {
 341                 free(bo);
 342                 return NULL;
 343         }
 344
 345         pthread_mutex_lock(&drv->driver_lock);
 346
 347         for (plane = 0; plane < bo->meta.num_planes; plane++) {
 348                 if (plane > 0)
 349                         assert(bo->meta.offsets[plane] >= bo->meta.offsets[plane - 1]);
 350
 351                 drv_increment_reference_count(drv, bo, plane);
 352         }
 353
 354         pthread_mutex_unlock(&drv->driver_lock);
 355
 356         return bo;
 357 }
 358
 359 void drv_bo_destroy(struct bo *bo)
 360 {
 361         int ret;
 362         size_t plane;
 363         uintptr_t total = 0;
 364         struct driver *drv = bo->drv;
 365
 366         if (!bo->is_test_buffer) {
 367                 pthread_mutex_lock(&drv->driver_lock);
 368
 369                 for (plane = 0; plane < bo->meta.num_planes; plane++)
 370                         drv_decrement_reference_count(drv, bo, plane);
 371
 372                 for (plane = 0; plane < bo->meta.num_planes; plane++)
 373                         total += drv_get_reference_count(drv, bo, plane);
 374
 375                 pthread_mutex_unlock(&drv->driver_lock);
 376
 377                 if (total == 0) {
 378                         ret = drv_mapping_destroy(bo);
 379                         assert(ret == 0);
 380                         bo->drv->backend->bo_destroy(bo);
 381                 }
 382         }
 383
 384         free(bo);
 385 }
 386
 387 struct bo *drv_bo_import(struct driver *drv, struct drv_import_fd_data *data)
 388 {
 389         int ret;
 390         size_t plane;
 391         struct bo *bo;
 392         off_t seek_end;
 393
 394         bo = drv_bo_new(drv, data->width, data->height, data->format, data->use_flags, false);
 395
 396         if (!bo)
 397                 return NULL;
 398
 399         ret = drv->backend->bo_import(bo, data);
 400         if (ret) {
 401                 free(bo);
 402                 return NULL;
 403         }
 404
 405         for (plane = 0; plane < bo->meta.num_planes; plane++) {
 406                 pthread_mutex_lock(&bo->drv->driver_lock);
 407                 drv_increment_reference_count(bo->drv, bo, plane);
 408                 pthread_mutex_unlock(&bo->drv->driver_lock);
 409         }
 410
 411         for (plane = 0; plane < bo->meta.num_planes; plane++) {
 412                 bo->meta.strides[plane] = data->strides[plane];
 413                 bo->meta.offsets[plane] = data->offsets[plane];
 414                 bo->meta.format_modifiers[plane] = data->format_modifiers[plane];
 415
 416                 seek_end = lseek(data->fds[plane], 0, SEEK_END);
 417                 if (seek_end == (off_t)(-1)) {
 418                         drv_log("lseek() failed with %s\n", strerror(errno));
 419                         goto destroy_bo;
 420                 }
 421
 422                 lseek(data->fds[plane], 0, SEEK_SET);
 423                 if (plane == bo->meta.num_planes - 1 || data->offsets[plane + 1] == 0)
 424                         bo->meta.sizes[plane] = seek_end - data->offsets[plane];
 425                 else
 426                         bo->meta.sizes[plane] = data->offsets[plane + 1] - data->offsets[plane];
 427
 428                 if ((int64_t)bo->meta.offsets[plane] + bo->meta.sizes[plane] > seek_end) {
 429                         drv_log("buffer size is too large.\n");
 430                         goto destroy_bo;
 431                 }
 432
 433                 bo->meta.total_size += bo->meta.sizes[plane];
 434         }
 435
 436         return bo;
 437
 438 destroy_bo:
 439         drv_bo_destroy(bo);
 440         return NULL;
 441 }
 442
 443 void *drv_bo_map(struct bo *bo, const struct rectangle *rect, uint32_t map_flags,
 444                  struct mapping **map_data, size_t plane)
 445 {
 446         uint32_t i;
 447         uint8_t *addr;
 448         struct mapping mapping;
 449
 450         assert(rect->width >= 0);
 451         assert(rect->height >= 0);
 452         assert(rect->x + rect->width <= drv_bo_get_width(bo));
 453         assert(rect->y + rect->height <= drv_bo_get_height(bo));
 454         assert(BO_MAP_READ_WRITE & map_flags);
 455         /* No CPU access for protected buffers. */
 456         assert(!(bo->meta.use_flags & BO_USE_PROTECTED));
 457
 458         if (bo->is_test_buffer) {
 459                 return MAP_FAILED;
 460         }
 461
 462         memset(&mapping, 0, sizeof(mapping));
 463         mapping.rect = *rect;
 464         mapping.refcount = 1;
 465
 466         pthread_mutex_lock(&bo->drv->driver_lock);
 467
 468         for (i = 0; i < drv_array_size(bo->drv->mappings); i++) {
 469                 struct mapping *prior = (struct mapping *)drv_array_at_idx(bo->drv->mappings, i);
 470                 if (prior->vma->handle != bo->handles[plane].u32 ||
 471                     prior->vma->map_flags != map_flags)
 472                         continue;
 473
 474                 if (rect->x != prior->rect.x || rect->y != prior->rect.y ||
 475                     rect->width != prior->rect.width || rect->height != prior->rect.height)
 476                         continue;
 477
 478                 prior->refcount++;
 479                 *map_data = prior;
 480                 goto exact_match;
 481         }
 482
 483         for (i = 0; i < drv_array_size(bo->drv->mappings); i++) {
 484                 struct mapping *prior = (struct mapping *)drv_array_at_idx(bo->drv->mappings, i);
 485                 if (prior->vma->handle != bo->handles[plane].u32 ||
 486                     prior->vma->map_flags != map_flags)
 487                         continue;
 488
 489                 prior->vma->refcount++;
 490                 mapping.vma = prior->vma;
 491                 goto success;
 492         }
 493
 494         mapping.vma = calloc(1, sizeof(*mapping.vma));
 495         memcpy(mapping.vma->map_strides, bo->meta.strides, sizeof(mapping.vma->map_strides));
 496         addr = bo->drv->backend->bo_map(bo, mapping.vma, plane, map_flags);
 497         if (addr == MAP_FAILED) {
 498                 *map_data = NULL;
 499                 free(mapping.vma);
 500                 pthread_mutex_unlock(&bo->drv->driver_lock);
 501                 return MAP_FAILED;
 502         }
 503
 504         mapping.vma->refcount = 1;
 505         mapping.vma->addr = addr;
 506         mapping.vma->handle = bo->handles[plane].u32;
 507         mapping.vma->map_flags = map_flags;
 508
 509 success:
 510         *map_data = drv_array_append(bo->drv->mappings, &mapping);
 511 exact_match:
 512         drv_bo_invalidate(bo, *map_data);
 513         addr = (uint8_t *)((*map_data)->vma->addr);
 514         addr += drv_bo_get_plane_offset(bo, plane);
 515         pthread_mutex_unlock(&bo->drv->driver_lock);
 516         return (void *)addr;
 517 }
 518
 519 int drv_bo_unmap(struct bo *bo, struct mapping *mapping)
 520 {
 521         uint32_t i;
 522         int ret = 0;
 523
 524         pthread_mutex_lock(&bo->drv->driver_lock);
 525
 526         if (--mapping->refcount)
 527                 goto out;
 528
 529         if (!--mapping->vma->refcount) {
 530                 ret = bo->drv->backend->bo_unmap(bo, mapping->vma);
 531                 free(mapping->vma);
 532         }
 533
 534         for (i = 0; i < drv_array_size(bo->drv->mappings); i++) {
 535                 if (mapping == (struct mapping *)drv_array_at_idx(bo->drv->mappings, i)) {
 536                         drv_array_remove(bo->drv->mappings, i);
 537                         break;
 538                 }
 539         }
 540
 541 out:
 542         pthread_mutex_unlock(&bo->drv->driver_lock);
 543         return ret;
 544 }
 545
 546 int drv_bo_invalidate(struct bo *bo, struct mapping *mapping)
 547 {
 548         int ret = 0;
 549
 550         assert(mapping);
 551         assert(mapping->vma);
 552         assert(mapping->refcount > 0);
 553         assert(mapping->vma->refcount > 0);
 554
 555         if (bo->drv->backend->bo_invalidate)
 556                 ret = bo->drv->backend->bo_invalidate(bo, mapping);
 557
 558         return ret;
 559 }
 560
 561 int drv_bo_flush(struct bo *bo, struct mapping *mapping)
 562 {
 563         int ret = 0;
 564
 565         assert(mapping);
 566         assert(mapping->vma);
 567         assert(mapping->refcount > 0);
 568         assert(mapping->vma->refcount > 0);
 569
 570         if (bo->drv->backend->bo_flush)
 571                 ret = bo->drv->backend->bo_flush(bo, mapping);
 572
 573         return ret;
 574 }
 575
 576 int drv_bo_flush_or_unmap(struct bo *bo, struct mapping *mapping)
 577 {
 578         int ret = 0;
 579
 580         assert(mapping);
 581         assert(mapping->vma);
 582         assert(mapping->refcount > 0);
 583         assert(mapping->vma->refcount > 0);
 584         assert(!(bo->meta.use_flags & BO_USE_PROTECTED));
 585
 586         if (bo->drv->backend->bo_flush)
 587                 ret = bo->drv->backend->bo_flush(bo, mapping);
 588         else
 589                 ret = drv_bo_unmap(bo, mapping);
 590
 591         return ret;
 592 }
 593
 594 uint32_t drv_bo_get_width(struct bo *bo)
 595 {
 596         return bo->meta.width;
 597 }
 598
 599 uint32_t drv_bo_get_height(struct bo *bo)
 600 {
 601         return bo->meta.height;
 602 }
 603
 604 size_t drv_bo_get_num_planes(struct bo *bo)
 605 {
 606         return bo->meta.num_planes;
 607 }
 608
 609 union bo_handle drv_bo_get_plane_handle(struct bo *bo, size_t plane)
 610 {
 611         return bo->handles[plane];
 612 }
 613
 614 #ifndef DRM_RDWR
 615 #define DRM_RDWR O_RDWR
 616 #endif
 617
 618 int drv_bo_get_plane_fd(struct bo *bo, size_t plane)
 619 {
 620
 621         int ret, fd;
 622         assert(plane < bo->meta.num_planes);
 623
 624         if (bo->is_test_buffer) {
 625                 return -EINVAL;
 626         }
 627
 628         ret = drmPrimeHandleToFD(bo->drv->fd, bo->handles[plane].u32, DRM_CLOEXEC | DRM_RDWR, &fd);
 629
 630         // Older DRM implementations blocked DRM_RDWR, but gave a read/write mapping anyways
 631         if (ret)
 632                 ret = drmPrimeHandleToFD(bo->drv->fd, bo->handles[plane].u32, DRM_CLOEXEC, &fd);
 633
 634         return (ret) ? ret : fd;
 635 }
 636
 637 uint32_t drv_bo_get_plane_offset(struct bo *bo, size_t plane)
 638 {
 639         assert(plane < bo->meta.num_planes);
 640         return bo->meta.offsets[plane];
 641 }
 642
 643 uint32_t drv_bo_get_plane_size(struct bo *bo, size_t plane)
 644 {
 645         assert(plane < bo->meta.num_planes);
 646         return bo->meta.sizes[plane];
 647 }
 648
 649 uint32_t drv_bo_get_plane_stride(struct bo *bo, size_t plane)
 650 {
 651         assert(plane < bo->meta.num_planes);
 652         return bo->meta.strides[plane];
 653 }
 654
 655 uint64_t drv_bo_get_plane_format_modifier(struct bo *bo, size_t plane)
 656 {
 657         assert(plane < bo->meta.num_planes);
 658         return bo->meta.format_modifiers[plane];
 659 }
 660
 661 uint32_t drv_bo_get_format(struct bo *bo)
 662 {
 663         return bo->meta.format;
 664 }
 665
 666 size_t drv_bo_get_total_size(struct bo *bo)
 667 {
 668         return bo->meta.total_size;
 669 }
 670
 671 uint32_t drv_resolve_format(struct driver *drv, uint32_t format, uint64_t use_flags)
 672 {
 673         if (drv->backend->resolve_format)
 674                 return drv->backend->resolve_format(drv, format, use_flags);
 675
 676         return format;
 677 }
 678
 679 uint32_t drv_num_buffers_per_bo(struct bo *bo)
 680 {
 681         uint32_t count = 0;
 682         size_t plane, p;
 683
 684         if (bo->is_test_buffer) {
 685                 return 0;
 686         }
 687
 688         for (plane = 0; plane < bo->meta.num_planes; plane++) {
 689                 for (p = 0; p < plane; p++)
 690                         if (bo->handles[p].u32 == bo->handles[plane].u32)
 691                                 break;
 692                 if (p == plane)
 693                         count++;
 694         }
 695
 696         return count;
 697 }
 698
 699 void drv_log_prefix(const char *prefix, const char *file, int line, const char *format, ...)
 700 {
 701         char buf[50];
 702         snprintf(buf, sizeof(buf), "[%s:%s(%d)]", prefix, basename(file), line);
 703
 704         va_list args;
 705         va_start(args, format);
 706 #ifdef __ANDROID__
 707         __android_log_vprint(ANDROID_LOG_ERROR, buf, format, args);
 708 #else
 709         fprintf(stderr, "%s ", buf);
 710         vfprintf(stderr, format, args);
 711 #endif
 712         va_end(args);
 713 }
 714
 715 int drv_resource_info(struct bo *bo, uint32_t strides[DRV_MAX_PLANES],
 716                       uint32_t offsets[DRV_MAX_PLANES])
 717 {
 718         for (uint32_t plane = 0; plane < bo->meta.num_planes; plane++) {
 719                 strides[plane] = bo->meta.strides[plane];
 720                 offsets[plane] = bo->meta.offsets[plane];
 721         }
 722
 723         if (bo->drv->backend->resource_info)
 724                 return bo->drv->backend->resource_info(bo, strides, offsets);
 725
 726         return 0;
 727 }