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 <xf86drm.h>
  16
  17 #include "drv_priv.h"
  18 #include "helpers.h"
  19 #include "util.h"
  20
  21 #ifdef DRV_AMDGPU
  22 extern struct backend backend_amdgpu;
  23 #endif
  24 extern struct backend backend_cirrus;
  25 extern struct backend backend_evdi;
  26 #ifdef DRV_EXYNOS
  27 extern struct backend backend_exynos;
  28 #endif
  29 extern struct backend backend_gma500;
  30 #ifdef DRV_I915
  31 extern struct backend backend_i915;
  32 #endif
  33 #ifdef DRV_MARVELL
  34 extern struct backend backend_marvell;
  35 #endif
  36 #ifdef DRV_MEDIATEK
  37 extern struct backend backend_mediatek;
  38 #endif
  39 extern struct backend backend_nouveau;
  40 #ifdef DRV_RADEON
  41 extern struct backend backend_radeon;
  42 #endif
  43 #ifdef DRV_ROCKCHIP
  44 extern struct backend backend_rockchip;
  45 #endif
  46 #ifdef DRV_TEGRA
  47 extern struct backend backend_tegra;
  48 #endif
  49 extern struct backend backend_udl;
  50 #ifdef DRV_VC4
  51 extern struct backend backend_vc4;
  52 #endif
  53 extern struct backend backend_vgem;
  54 extern struct backend backend_virtio_gpu;
  55
  56 static struct backend *drv_get_backend(int fd)
  57 {
  58         drmVersionPtr drm_version;
  59         unsigned int i;
  60
  61         drm_version = drmGetVersion(fd);
  62
  63         if (!drm_version)
  64                 return NULL;
  65
  66         struct backend *backend_list[] = {
  67 #ifdef DRV_AMDGPU
  68                 &backend_amdgpu,
  69 #endif
  70                 &backend_cirrus,   &backend_evdi,
  71 #ifdef DRV_EXYNOS
  72                 &backend_exynos,
  73 #endif
  74                 &backend_gma500,
  75 #ifdef DRV_I915
  76                 &backend_i915,
  77 #endif
  78 #ifdef DRV_MARVELL
  79                 &backend_marvell,
  80 #endif
  81 #ifdef DRV_MEDIATEK
  82                 &backend_mediatek,
  83 #endif
  84                 &backend_nouveau,
  85 #ifdef DRV_RADEON
  86                 &backend_radeon,
  87 #endif
  88 #ifdef DRV_ROCKCHIP
  89                 &backend_rockchip,
  90 #endif
  91 #ifdef DRV_TEGRA
  92                 &backend_tegra,
  93 #endif
  94                 &backend_udl,
  95 #ifdef DRV_VC4
  96                 &backend_vc4,
  97 #endif
  98                 &backend_vgem,     &backend_virtio_gpu,
  99         };
 100
 101         for (i = 0; i < ARRAY_SIZE(backend_list); i++)
 102                 if (!strcmp(drm_version->name, backend_list[i]->name)) {
 103                         drmFreeVersion(drm_version);
 104                         return backend_list[i];
 105                 }
 106
 107         drmFreeVersion(drm_version);
 108         return NULL;
 109 }
 110
 111 struct driver *drv_create(int fd)
 112 {
 113         struct driver *drv;
 114         int ret;
 115
 116         drv = (struct driver *)calloc(1, sizeof(*drv));
 117
 118         if (!drv)
 119                 return NULL;
 120
 121         drv->fd = fd;
 122         drv->backend = drv_get_backend(fd);
 123
 124         if (!drv->backend)
 125                 goto free_driver;
 126
 127         if (pthread_mutex_init(&drv->driver_lock, NULL))
 128                 goto free_driver;
 129
 130         drv->buffer_table = drmHashCreate();
 131         if (!drv->buffer_table)
 132                 goto free_lock;
 133
 134         drv->map_table = drmHashCreate();
 135         if (!drv->map_table)
 136                 goto free_buffer_table;
 137
 138         /* Start with a power of 2 number of allocations. */
 139         drv->backend->combos.allocations = 2;
 140         drv->backend->combos.size = 0;
 141         drv->backend->combos.data =
 142             calloc(drv->backend->combos.allocations, sizeof(struct combination));
 143         if (!drv->backend->combos.data)
 144                 goto free_map_table;
 145
 146         if (drv->backend->init) {
 147                 ret = drv->backend->init(drv);
 148                 if (ret) {
 149                         free(drv->backend->combos.data);
 150                         goto free_map_table;
 151                 }
 152         }
 153
 154         return drv;
 155
 156 free_map_table:
 157         drmHashDestroy(drv->map_table);
 158 free_buffer_table:
 159         drmHashDestroy(drv->buffer_table);
 160 free_lock:
 161         pthread_mutex_destroy(&drv->driver_lock);
 162 free_driver:
 163         free(drv);
 164         return NULL;
 165 }
 166
 167 void drv_destroy(struct driver *drv)
 168 {
 169         pthread_mutex_lock(&drv->driver_lock);
 170
 171         if (drv->backend->close)
 172                 drv->backend->close(drv);
 173
 174         drmHashDestroy(drv->buffer_table);
 175         drmHashDestroy(drv->map_table);
 176
 177         free(drv->backend->combos.data);
 178
 179         pthread_mutex_unlock(&drv->driver_lock);
 180         pthread_mutex_destroy(&drv->driver_lock);
 181
 182         free(drv);
 183 }
 184
 185 int drv_get_fd(struct driver *drv)
 186 {
 187         return drv->fd;
 188 }
 189
 190 const char *drv_get_name(struct driver *drv)
 191 {
 192         return drv->backend->name;
 193 }
 194
 195 struct combination *drv_get_combination(struct driver *drv, uint32_t format, uint64_t usage)
 196 {
 197         struct combination *curr, *best;
 198
 199         if (format == DRM_FORMAT_NONE || usage == BO_USE_NONE)
 200                 return 0;
 201
 202         best = NULL;
 203         uint32_t i;
 204         for (i = 0; i < drv->backend->combos.size; i++) {
 205                 curr = &drv->backend->combos.data[i];
 206                 if ((format == curr->format) && usage == (curr->usage & usage))
 207                         if (!best || best->metadata.priority < curr->metadata.priority)
 208                                 best = curr;
 209         }
 210
 211         return best;
 212 }
 213
 214 struct bo *drv_bo_new(struct driver *drv, uint32_t width, uint32_t height, uint32_t format)
 215 {
 216
 217         struct bo *bo;
 218         bo = (struct bo *)calloc(1, sizeof(*bo));
 219
 220         if (!bo)
 221                 return NULL;
 222
 223         bo->drv = drv;
 224         bo->width = width;
 225         bo->height = height;
 226         bo->format = format;
 227         bo->num_planes = drv_num_planes_from_format(format);
 228
 229         if (!bo->num_planes) {
 230                 free(bo);
 231                 return NULL;
 232         }
 233
 234         return bo;
 235 }
 236
 237 struct bo *drv_bo_create(struct driver *drv, uint32_t width, uint32_t height, uint32_t format,
 238                          uint64_t flags)
 239 {
 240         int ret;
 241         size_t plane;
 242         struct bo *bo;
 243
 244         bo = drv_bo_new(drv, width, height, format);
 245
 246         if (!bo)
 247                 return NULL;
 248
 249         ret = drv->backend->bo_create(bo, width, height, format, flags);
 250
 251         if (ret) {
 252                 free(bo);
 253                 return NULL;
 254         }
 255
 256         pthread_mutex_lock(&drv->driver_lock);
 257
 258         for (plane = 0; plane < bo->num_planes; plane++)
 259                 drv_increment_reference_count(drv, bo, plane);
 260
 261         pthread_mutex_unlock(&drv->driver_lock);
 262
 263         return bo;
 264 }
 265
 266 struct bo *drv_bo_create_with_modifiers(struct driver *drv, uint32_t width, uint32_t height,
 267                                         uint32_t format, const uint64_t *modifiers, uint32_t count)
 268 {
 269         int ret;
 270         size_t plane;
 271         struct bo *bo;
 272
 273         if (!drv->backend->bo_create_with_modifiers) {
 274                 errno = ENOENT;
 275                 return NULL;
 276         }
 277
 278         bo = drv_bo_new(drv, width, height, format);
 279
 280         if (!bo)
 281                 return NULL;
 282
 283         ret = drv->backend->bo_create_with_modifiers(bo, width, height, format, modifiers, count);
 284
 285         if (ret) {
 286                 free(bo);
 287                 return NULL;
 288         }
 289
 290         pthread_mutex_lock(&drv->driver_lock);
 291
 292         for (plane = 0; plane < bo->num_planes; plane++)
 293                 drv_increment_reference_count(drv, bo, plane);
 294
 295         pthread_mutex_unlock(&drv->driver_lock);
 296
 297         return bo;
 298 }
 299
 300 void drv_bo_destroy(struct bo *bo)
 301 {
 302         size_t plane;
 303         uintptr_t total = 0;
 304         struct driver *drv = bo->drv;
 305
 306         pthread_mutex_lock(&drv->driver_lock);
 307
 308         for (plane = 0; plane < bo->num_planes; plane++)
 309                 drv_decrement_reference_count(drv, bo, plane);
 310
 311         for (plane = 0; plane < bo->num_planes; plane++)
 312                 total += drv_get_reference_count(drv, bo, plane);
 313
 314         pthread_mutex_unlock(&drv->driver_lock);
 315
 316         if (total == 0)
 317                 bo->drv->backend->bo_destroy(bo);
 318
 319         free(bo);
 320 }
 321
 322 struct bo *drv_bo_import(struct driver *drv, struct drv_import_fd_data *data)
 323 {
 324         int ret;
 325         size_t plane;
 326         struct bo *bo;
 327
 328         bo = drv_bo_new(drv, data->width, data->height, data->format);
 329
 330         if (!bo)
 331                 return NULL;
 332
 333         ret = drv->backend->bo_import(bo, data);
 334         if (ret) {
 335                 free(bo);
 336                 return NULL;
 337         }
 338
 339         for (plane = 0; plane < bo->num_planes; plane++) {
 340                 bo->strides[plane] = data->strides[plane];
 341                 bo->offsets[plane] = data->offsets[plane];
 342                 bo->sizes[plane] = data->sizes[plane];
 343                 bo->format_modifiers[plane] = data->format_modifiers[plane];
 344                 bo->total_size += data->sizes[plane];
 345         }
 346
 347         return bo;
 348 }
 349
 350 void *drv_bo_map(struct bo *bo, uint32_t x, uint32_t y, uint32_t width, uint32_t height,
 351                  uint32_t flags, struct map_info **map_data, size_t plane)
 352 {
 353         void *ptr;
 354         uint8_t *addr;
 355         size_t offset;
 356         struct map_info *data;
 357         int prot;
 358
 359         assert(width > 0);
 360         assert(height > 0);
 361         assert(x + width <= drv_bo_get_width(bo));
 362         assert(y + height <= drv_bo_get_height(bo));
 363         assert(BO_TRANSFER_READ_WRITE & flags);
 364
 365         pthread_mutex_lock(&bo->drv->driver_lock);
 366
 367         if (!drmHashLookup(bo->drv->map_table, bo->handles[plane].u32, &ptr)) {
 368                 data = (struct map_info *)ptr;
 369                 data->refcount++;
 370                 goto success;
 371         }
 372
 373         data = calloc(1, sizeof(*data));
 374         prot = BO_TRANSFER_WRITE & flags ? PROT_WRITE | PROT_READ : PROT_READ;
 375         addr = bo->drv->backend->bo_map(bo, data, plane, prot);
 376         if (addr == MAP_FAILED) {
 377                 *map_data = NULL;
 378                 free(data);
 379                 pthread_mutex_unlock(&bo->drv->driver_lock);
 380                 return MAP_FAILED;
 381         }
 382
 383         data->refcount = 1;
 384         data->addr = addr;
 385         data->handle = bo->handles[plane].u32;
 386         drmHashInsert(bo->drv->map_table, bo->handles[plane].u32, (void *)data);
 387
 388 success:
 389         *map_data = data;
 390         offset = drv_bo_get_plane_stride(bo, plane) * y;
 391         offset += drv_stride_from_format(bo->format, x, plane);
 392         addr = (uint8_t *)data->addr;
 393         addr += drv_bo_get_plane_offset(bo, plane) + offset;
 394         pthread_mutex_unlock(&bo->drv->driver_lock);
 395
 396         return (void *)addr;
 397 }
 398
 399 int drv_bo_unmap(struct bo *bo, struct map_info *data)
 400 {
 401         int ret = 0;
 402
 403         assert(data);
 404         assert(data->refcount >= 0);
 405
 406         pthread_mutex_lock(&bo->drv->driver_lock);
 407
 408         if (!--data->refcount) {
 409                 if (bo->drv->backend->bo_unmap)
 410                         ret = bo->drv->backend->bo_unmap(bo, data);
 411                 else
 412                         ret = munmap(data->addr, data->length);
 413                 drmHashDelete(bo->drv->map_table, data->handle);
 414                 free(data);
 415         }
 416
 417         pthread_mutex_unlock(&bo->drv->driver_lock);
 418
 419         return ret;
 420 }
 421
 422 uint32_t drv_bo_get_width(struct bo *bo)
 423 {
 424         return bo->width;
 425 }
 426
 427 uint32_t drv_bo_get_height(struct bo *bo)
 428 {
 429         return bo->height;
 430 }
 431
 432 uint32_t drv_bo_get_stride_or_tiling(struct bo *bo)
 433 {
 434         return bo->tiling ? bo->tiling : drv_bo_get_plane_stride(bo, 0);
 435 }
 436
 437 size_t drv_bo_get_num_planes(struct bo *bo)
 438 {
 439         return bo->num_planes;
 440 }
 441
 442 union bo_handle drv_bo_get_plane_handle(struct bo *bo, size_t plane)
 443 {
 444         return bo->handles[plane];
 445 }
 446
 447 #ifndef DRM_RDWR
 448 #define DRM_RDWR O_RDWR
 449 #endif
 450
 451 int drv_bo_get_plane_fd(struct bo *bo, size_t plane)
 452 {
 453
 454         int ret, fd;
 455         assert(plane < bo->num_planes);
 456
 457         ret = drmPrimeHandleToFD(bo->drv->fd, bo->handles[plane].u32, DRM_CLOEXEC | DRM_RDWR, &fd);
 458
 459         return (ret) ? ret : fd;
 460 }
 461
 462 uint32_t drv_bo_get_plane_offset(struct bo *bo, size_t plane)
 463 {
 464         assert(plane < bo->num_planes);
 465         return bo->offsets[plane];
 466 }
 467
 468 uint32_t drv_bo_get_plane_size(struct bo *bo, size_t plane)
 469 {
 470         assert(plane < bo->num_planes);
 471         return bo->sizes[plane];
 472 }
 473
 474 uint32_t drv_bo_get_plane_stride(struct bo *bo, size_t plane)
 475 {
 476         assert(plane < bo->num_planes);
 477         return bo->strides[plane];
 478 }
 479
 480 uint64_t drv_bo_get_plane_format_modifier(struct bo *bo, size_t plane)
 481 {
 482         assert(plane < bo->num_planes);
 483         return bo->format_modifiers[plane];
 484 }
 485
 486 uint32_t drv_bo_get_format(struct bo *bo)
 487 {
 488         return bo->format;
 489 }
 490
 491 uint32_t drv_resolve_format(struct driver *drv, uint32_t format, uint64_t usage)
 492 {
 493         if (drv->backend->resolve_format)
 494                 return drv->backend->resolve_format(format, usage);
 495
 496         return format;
 497 }
 498
 499 size_t drv_num_planes_from_format(uint32_t format)
 500 {
 501         switch (format) {
 502         case DRM_FORMAT_ABGR1555:
 503         case DRM_FORMAT_ABGR2101010:
 504         case DRM_FORMAT_ABGR4444:
 505         case DRM_FORMAT_ABGR8888:
 506         case DRM_FORMAT_ARGB1555:
 507         case DRM_FORMAT_ARGB2101010:
 508         case DRM_FORMAT_ARGB4444:
 509         case DRM_FORMAT_ARGB8888:
 510         case DRM_FORMAT_AYUV:
 511         case DRM_FORMAT_BGR233:
 512         case DRM_FORMAT_BGR565:
 513         case DRM_FORMAT_BGR888:
 514         case DRM_FORMAT_BGRA1010102:
 515         case DRM_FORMAT_BGRA4444:
 516         case DRM_FORMAT_BGRA5551:
 517         case DRM_FORMAT_BGRA8888:
 518         case DRM_FORMAT_BGRX1010102:
 519         case DRM_FORMAT_BGRX4444:
 520         case DRM_FORMAT_BGRX5551:
 521         case DRM_FORMAT_BGRX8888:
 522         case DRM_FORMAT_C8:
 523         case DRM_FORMAT_GR88:
 524         case DRM_FORMAT_R8:
 525         case DRM_FORMAT_RG88:
 526         case DRM_FORMAT_RGB332:
 527         case DRM_FORMAT_RGB565:
 528         case DRM_FORMAT_RGB888:
 529         case DRM_FORMAT_RGBA1010102:
 530         case DRM_FORMAT_RGBA4444:
 531         case DRM_FORMAT_RGBA5551:
 532         case DRM_FORMAT_RGBA8888:
 533         case DRM_FORMAT_RGBX1010102:
 534         case DRM_FORMAT_RGBX4444:
 535         case DRM_FORMAT_RGBX5551:
 536         case DRM_FORMAT_RGBX8888:
 537         case DRM_FORMAT_UYVY:
 538         case DRM_FORMAT_VYUY:
 539         case DRM_FORMAT_XBGR1555:
 540         case DRM_FORMAT_XBGR2101010:
 541         case DRM_FORMAT_XBGR4444:
 542         case DRM_FORMAT_XBGR8888:
 543         case DRM_FORMAT_XRGB1555:
 544         case DRM_FORMAT_XRGB2101010:
 545         case DRM_FORMAT_XRGB4444:
 546         case DRM_FORMAT_XRGB8888:
 547         case DRM_FORMAT_YUYV:
 548         case DRM_FORMAT_YVYU:
 549                 return 1;
 550         case DRM_FORMAT_NV12:
 551         case DRM_FORMAT_NV21:
 552                 return 2;
 553         case DRM_FORMAT_YVU420:
 554         case DRM_FORMAT_YVU420_ANDROID:
 555                 return 3;
 556         }
 557
 558         fprintf(stderr, "drv: UNKNOWN FORMAT %d\n", format);
 559         return 0;
 560 }
 561
 562 uint32_t drv_size_from_format(uint32_t format, uint32_t stride, uint32_t height, size_t plane)
 563 {
 564         assert(plane < drv_num_planes_from_format(format));
 565         uint32_t vertical_subsampling;
 566
 567         switch (format) {
 568         case DRM_FORMAT_NV12:
 569         case DRM_FORMAT_YVU420:
 570         case DRM_FORMAT_YVU420_ANDROID:
 571                 vertical_subsampling = (plane == 0) ? 1 : 2;
 572                 break;
 573         default:
 574                 vertical_subsampling = 1;
 575         }
 576
 577         return stride * DIV_ROUND_UP(height, vertical_subsampling);
 578 }
 579
 580 uint32_t drv_num_buffers_per_bo(struct bo *bo)
 581 {
 582         uint32_t count = 0;
 583         size_t plane, p;
 584
 585         for (plane = 0; plane < bo->num_planes; plane++) {
 586                 for (p = 0; p < plane; p++)
 587                         if (bo->handles[p].u32 == bo->handles[plane].u32)
 588                                 break;
 589                 if (p == plane)
 590                         count++;
 591         }
 592
 593         return count;
 594 }