gbm.c

   1 /*
   2  * Copyright (c) 2014 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
   7 #include <assert.h>
   8 #include <fcntl.h>
   9 #include <stdint.h>
  10 #include <stdio.h>
  11 #include <stdlib.h>
  12 #include <string.h>
  13 #include <xf86drm.h>
  14
  15 #include "gbm_priv.h"
  16 #include "helpers.h"
  17 #include "util.h"
  18
  19 extern struct gbm_driver gbm_driver_cirrus;
  20 extern struct gbm_driver gbm_driver_evdi;
  21 #ifdef GBM_EXYNOS
  22 extern struct gbm_driver gbm_driver_exynos;
  23 #endif
  24 extern struct gbm_driver gbm_driver_gma500;
  25 #ifdef GBM_I915
  26 extern struct gbm_driver gbm_driver_i915;
  27 #endif
  28 #ifdef GBM_MARVELL
  29 extern struct gbm_driver gbm_driver_marvell;
  30 #endif
  31 #ifdef GBM_MEDIATEK
  32 extern struct gbm_driver gbm_driver_mediatek;
  33 #endif
  34 #ifdef GBM_ROCKCHIP
  35 extern struct gbm_driver gbm_driver_rockchip;
  36 #endif
  37 #ifdef GBM_TEGRA
  38 extern struct gbm_driver gbm_driver_tegra;
  39 #endif
  40 extern struct gbm_driver gbm_driver_udl;
  41 extern struct gbm_driver gbm_driver_virtio_gpu;
  42
  43 static struct gbm_driver *gbm_get_driver(int fd)
  44 {
  45         drmVersionPtr drm_version;
  46         unsigned int i;
  47
  48         drm_version = drmGetVersion(fd);
  49
  50         if (!drm_version)
  51                 return NULL;
  52
  53         struct gbm_driver *driver_list[] = {
  54                 &gbm_driver_cirrus,
  55                 &gbm_driver_evdi,
  56 #ifdef GBM_EXYNOS
  57                 &gbm_driver_exynos,
  58 #endif
  59                 &gbm_driver_gma500,
  60 #ifdef GBM_I915
  61                 &gbm_driver_i915,
  62 #endif
  63 #ifdef GBM_MARVELL
  64                 &gbm_driver_marvell,
  65 #endif
  66 #ifdef GBM_MEDIATEK
  67                 &gbm_driver_mediatek,
  68 #endif
  69 #ifdef GBM_ROCKCHIP
  70                 &gbm_driver_rockchip,
  71 #endif
  72 #ifdef GBM_TEGRA
  73                 &gbm_driver_tegra,
  74 #endif
  75                 &gbm_driver_udl,
  76                 &gbm_driver_virtio_gpu,
  77         };
  78
  79         for(i = 0; i < ARRAY_SIZE(driver_list); i++)
  80                 if (!strcmp(drm_version->name, driver_list[i]->name))
  81                 {
  82                         drmFreeVersion(drm_version);
  83                         return driver_list[i];
  84                 }
  85
  86         drmFreeVersion(drm_version);
  87         return NULL;
  88 }
  89
  90 PUBLIC int
  91 gbm_device_get_fd(struct gbm_device *gbm)
  92 {
  93         return gbm->fd;
  94 }
  95
  96 PUBLIC const char *
  97 gbm_device_get_backend_name(struct gbm_device *gbm)
  98 {
  99         return gbm->driver->name;
 100 }
 101
 102 PUBLIC int
 103 gbm_device_is_format_supported(struct gbm_device *gbm,
 104                                uint32_t format, uint32_t usage)
 105 {
 106         unsigned i;
 107
 108         if (usage & GBM_BO_USE_CURSOR &&
 109                 usage & GBM_BO_USE_RENDERING)
 110                 return 0;
 111
 112         for(i = 0 ; i < ARRAY_SIZE(gbm->driver->format_list); i++)
 113         {
 114                 if (!gbm->driver->format_list[i].format)
 115                         break;
 116
 117                 if (gbm->driver->format_list[i].format == format &&
 118                         (gbm->driver->format_list[i].usage & usage) == usage)
 119                         return 1;
 120         }
 121
 122         return 0;
 123 }
 124
 125 PUBLIC struct gbm_device *gbm_create_device(int fd)
 126 {
 127         struct gbm_device *gbm;
 128         int ret;
 129
 130         gbm = (struct gbm_device*) malloc(sizeof(*gbm));
 131         if (!gbm)
 132                 return NULL;
 133
 134         gbm->fd = fd;
 135
 136         gbm->driver = gbm_get_driver(fd);
 137         if (!gbm->driver) {
 138                 free(gbm);
 139                 return NULL;
 140         }
 141
 142         if (gbm->driver->init) {
 143                 ret = gbm->driver->init(gbm);
 144                 if (ret) {
 145                         free(gbm);
 146                         return NULL;
 147                 }
 148         }
 149
 150         return gbm;
 151 }
 152
 153 PUBLIC void gbm_device_destroy(struct gbm_device *gbm)
 154 {
 155         if (gbm->driver->close)
 156                 gbm->driver->close(gbm);
 157         free(gbm);
 158 }
 159
 160 PUBLIC struct gbm_surface *gbm_surface_create(struct gbm_device *gbm,
 161                                               uint32_t width, uint32_t height,
 162                                               uint32_t format, uint32_t flags)
 163 {
 164         struct gbm_surface *surface =
 165                 (struct gbm_surface*) malloc(sizeof(*surface));
 166
 167         if (!surface)
 168                 return NULL;
 169
 170         return surface;
 171 }
 172
 173 PUBLIC void gbm_surface_destroy(struct gbm_surface *surface)
 174 {
 175         free(surface);
 176 }
 177
 178 PUBLIC struct gbm_bo *gbm_surface_lock_front_buffer(struct gbm_surface *surface)
 179 {
 180         return NULL;
 181 }
 182
 183 PUBLIC void gbm_surface_release_buffer(struct gbm_surface *surface,
 184                                        struct gbm_bo *bo)
 185 {
 186 }
 187
 188 static struct gbm_bo *gbm_bo_new(struct gbm_device *gbm,
 189                                  uint32_t width, uint32_t height,
 190                                  uint32_t format)
 191 {
 192         struct gbm_bo *bo;
 193
 194         bo = (struct gbm_bo*) calloc(1, sizeof(*bo));
 195         if (!bo)
 196                 return NULL;
 197
 198         bo->gbm = gbm;
 199         bo->width = width;
 200         bo->height = height;
 201         bo->format = format;
 202         bo->num_planes = gbm_num_planes_from_format(format);
 203         if (!bo->num_planes) {
 204                 free(bo);
 205                 return NULL;
 206         }
 207
 208         return bo;
 209 }
 210
 211 PUBLIC struct gbm_bo *gbm_bo_create(struct gbm_device *gbm, uint32_t width,
 212                                     uint32_t height, uint32_t format,
 213                                     uint32_t flags)
 214 {
 215         struct gbm_bo *bo;
 216         int ret;
 217
 218         if (!gbm_device_is_format_supported(gbm, format, flags))
 219                 return NULL;
 220
 221         bo = gbm_bo_new(gbm, width, height, format);
 222         if (!bo)
 223                 return NULL;
 224
 225         ret = gbm->driver->bo_create(bo, width, height, format, flags);
 226         if (ret) {
 227                 free(bo);
 228                 return NULL;
 229         }
 230
 231         return bo;
 232 }
 233
 234 PUBLIC void gbm_bo_destroy(struct gbm_bo *bo)
 235 {
 236         if (bo->destroy_user_data) {
 237                 bo->destroy_user_data(bo, bo->user_data);
 238                 bo->destroy_user_data = NULL;
 239                 bo->user_data = NULL;
 240         }
 241
 242         bo->gbm->driver->bo_destroy(bo);
 243         free(bo);
 244 }
 245
 246 PUBLIC struct gbm_bo *
 247 gbm_bo_import(struct gbm_device *gbm, uint32_t type,
 248               void *buffer, uint32_t usage)
 249 {
 250         struct gbm_import_fd_data *fd_data = buffer;
 251         struct gbm_bo *bo;
 252         struct drm_prime_handle prime_handle;
 253         int ret;
 254
 255         if (type != GBM_BO_IMPORT_FD)
 256                 return NULL;
 257
 258         if (!gbm_device_is_format_supported(gbm, fd_data->format, usage))
 259                 return NULL;
 260
 261         /* This function can support only single plane formats. */
 262         /* If multi-plane import is desired, new function should be added. */
 263         if (gbm_num_planes_from_format(fd_data->format) != 1)
 264                 return NULL;
 265
 266         bo = gbm_bo_new(gbm, fd_data->width, fd_data->height, fd_data->format);
 267         if (!bo)
 268                 return NULL;
 269
 270         bo->strides[0] = fd_data->stride;
 271         bo->sizes[0] = fd_data->height * fd_data->stride;
 272
 273         memset(&prime_handle, 0, sizeof(prime_handle));
 274         prime_handle.fd = fd_data->fd;
 275
 276         ret = drmIoctl(bo->gbm->fd, DRM_IOCTL_PRIME_FD_TO_HANDLE, &prime_handle);
 277         if (ret) {
 278                 fprintf(stderr, "minigbm: DRM_IOCTL_PRIME_FD_TO_HANDLE failed "
 279                                 "(fd=%u)\n", prime_handle.fd);
 280                 free(bo);
 281                 return NULL;
 282         }
 283
 284         bo->handles[0].u32 = prime_handle.handle;
 285
 286         return bo;
 287 }
 288
 289 PUBLIC uint32_t
 290 gbm_bo_get_width(struct gbm_bo *bo)
 291 {
 292         return bo->width;
 293 }
 294
 295 PUBLIC uint32_t
 296 gbm_bo_get_height(struct gbm_bo *bo)
 297 {
 298         return bo->height;
 299 }
 300
 301 PUBLIC uint32_t
 302 gbm_bo_get_stride(struct gbm_bo *bo)
 303 {
 304         return gbm_bo_get_plane_stride(bo, 0);
 305 }
 306
 307 PUBLIC uint32_t
 308 gbm_bo_get_stride_or_tiling(struct gbm_bo *bo)
 309 {
 310         return bo->tiling ? bo->tiling : gbm_bo_get_stride(bo);
 311 }
 312
 313 PUBLIC uint32_t
 314 gbm_bo_get_format(struct gbm_bo *bo)
 315 {
 316         return bo->format;
 317 }
 318
 319 PUBLIC struct gbm_device *
 320 gbm_bo_get_device(struct gbm_bo *bo)
 321 {
 322         return bo->gbm;
 323 }
 324
 325 PUBLIC union gbm_bo_handle
 326 gbm_bo_get_handle(struct gbm_bo *bo)
 327 {
 328         return gbm_bo_get_plane_handle(bo, 0);
 329 }
 330
 331 PUBLIC int
 332 gbm_bo_get_fd(struct gbm_bo *bo)
 333 {
 334         return gbm_bo_get_plane_fd(bo, 0);
 335 }
 336
 337 PUBLIC size_t
 338 gbm_bo_get_num_planes(struct gbm_bo *bo)
 339 {
 340         return bo->num_planes;
 341 }
 342
 343 PUBLIC union gbm_bo_handle
 344 gbm_bo_get_plane_handle(struct gbm_bo *bo, size_t plane)
 345 {
 346         assert(plane < bo->num_planes);
 347         return bo->handles[plane];
 348 }
 349
 350 #ifndef DRM_RDWR
 351 #define DRM_RDWR O_RDWR
 352 #endif
 353
 354 PUBLIC int
 355 gbm_bo_get_plane_fd(struct gbm_bo *bo, size_t plane)
 356 {
 357         int fd;
 358         assert(plane < bo->num_planes);
 359
 360         if (drmPrimeHandleToFD(
 361                         gbm_device_get_fd(bo->gbm),
 362                         gbm_bo_get_plane_handle(bo, plane).u32,
 363                         DRM_CLOEXEC | DRM_RDWR,
 364                         &fd))
 365                 return -1;
 366         else
 367                 return fd;
 368 }
 369
 370 PUBLIC uint32_t
 371 gbm_bo_get_plane_offset(struct gbm_bo *bo, size_t plane)
 372 {
 373         assert(plane < bo->num_planes);
 374         return bo->offsets[plane];
 375 }
 376
 377 PUBLIC uint32_t
 378 gbm_bo_get_plane_size(struct gbm_bo *bo, size_t plane)
 379 {
 380         assert(plane < bo->num_planes);
 381         return bo->sizes[plane];
 382 }
 383
 384 PUBLIC uint32_t
 385 gbm_bo_get_plane_stride(struct gbm_bo *bo, size_t plane)
 386 {
 387         assert(plane < bo->num_planes);
 388         return bo->strides[plane];
 389 }
 390
 391 PUBLIC void
 392 gbm_bo_set_user_data(struct gbm_bo *bo, void *data,
 393                      void (*destroy_user_data)(struct gbm_bo *, void *))
 394 {
 395         bo->user_data = data;
 396         bo->destroy_user_data = destroy_user_data;
 397 }
 398
 399 PUBLIC void *
 400 gbm_bo_get_user_data(struct gbm_bo *bo)
 401 {
 402         return bo->user_data;
 403 }