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 (format == GBM_BO_FORMAT_XRGB8888)
 109                 format = GBM_FORMAT_XRGB8888;
 110         if (format == GBM_BO_FORMAT_ARGB8888)
 111                 format = GBM_FORMAT_ARGB8888;
 112
 113         if (usage & GBM_BO_USE_CURSOR &&
 114                 usage & GBM_BO_USE_RENDERING)
 115                 return 0;
 116
 117         for(i = 0 ; i < ARRAY_SIZE(gbm->driver->format_list); i++)
 118         {
 119                 if (!gbm->driver->format_list[i].format)
 120                         break;
 121
 122                 if (gbm->driver->format_list[i].format == format &&
 123                         (gbm->driver->format_list[i].usage & usage) == usage)
 124                         return 1;
 125         }
 126
 127         return 0;
 128 }
 129
 130 PUBLIC struct gbm_device *gbm_create_device(int fd)
 131 {
 132         struct gbm_device *gbm;
 133         int ret;
 134
 135         gbm = (struct gbm_device*) malloc(sizeof(*gbm));
 136         if (!gbm)
 137                 return NULL;
 138
 139         gbm->fd = fd;
 140
 141         gbm->driver = gbm_get_driver(fd);
 142         if (!gbm->driver) {
 143                 free(gbm);
 144                 return NULL;
 145         }
 146
 147         if (gbm->driver->init) {
 148                 ret = gbm->driver->init(gbm);
 149                 if (ret) {
 150                         free(gbm);
 151                         return NULL;
 152                 }
 153         }
 154
 155         return gbm;
 156 }
 157
 158 PUBLIC void gbm_device_destroy(struct gbm_device *gbm)
 159 {
 160         if (gbm->driver->close)
 161                 gbm->driver->close(gbm);
 162         free(gbm);
 163 }
 164
 165 PUBLIC struct gbm_surface *gbm_surface_create(struct gbm_device *gbm,
 166                                               uint32_t width, uint32_t height,
 167                                               uint32_t format, uint32_t flags)
 168 {
 169         struct gbm_surface *surface =
 170                 (struct gbm_surface*) malloc(sizeof(*surface));
 171
 172         if (!surface)
 173                 return NULL;
 174
 175         return surface;
 176 }
 177
 178 PUBLIC void gbm_surface_destroy(struct gbm_surface *surface)
 179 {
 180         free(surface);
 181 }
 182
 183 PUBLIC struct gbm_bo *gbm_surface_lock_front_buffer(struct gbm_surface *surface)
 184 {
 185         return NULL;
 186 }
 187
 188 PUBLIC void gbm_surface_release_buffer(struct gbm_surface *surface,
 189                                        struct gbm_bo *bo)
 190 {
 191 }
 192
 193 static struct gbm_bo *gbm_bo_new(struct gbm_device *gbm,
 194                                  uint32_t width, uint32_t height,
 195                                  uint32_t format)
 196 {
 197         struct gbm_bo *bo;
 198
 199         bo = (struct gbm_bo*) calloc(1, sizeof(*bo));
 200         if (!bo)
 201                 return NULL;
 202
 203         bo->gbm = gbm;
 204         bo->width = width;
 205         bo->height = height;
 206         bo->format = format;
 207         bo->num_planes = gbm_num_planes_from_format(format);
 208         if (!bo->num_planes) {
 209                 free(bo);
 210                 return NULL;
 211         }
 212
 213         return bo;
 214 }
 215
 216 PUBLIC struct gbm_bo *gbm_bo_create(struct gbm_device *gbm, uint32_t width,
 217                                     uint32_t height, uint32_t format,
 218                                     uint32_t flags)
 219 {
 220         struct gbm_bo *bo;
 221         int ret;
 222
 223         if (!gbm_device_is_format_supported(gbm, format, flags))
 224                 return NULL;
 225
 226         bo = gbm_bo_new(gbm, width, height, format);
 227         if (!bo)
 228                 return NULL;
 229
 230         ret = gbm->driver->bo_create(bo, width, height, format, flags);
 231         if (ret) {
 232                 free(bo);
 233                 return NULL;
 234         }
 235
 236         return bo;
 237 }
 238
 239 PUBLIC void gbm_bo_destroy(struct gbm_bo *bo)
 240 {
 241         if (bo->destroy_user_data) {
 242                 bo->destroy_user_data(bo, bo->user_data);
 243                 bo->destroy_user_data = NULL;
 244                 bo->user_data = NULL;
 245         }
 246
 247         bo->gbm->driver->bo_destroy(bo);
 248         free(bo);
 249 }
 250
 251 PUBLIC struct gbm_bo *
 252 gbm_bo_import(struct gbm_device *gbm, uint32_t type,
 253               void *buffer, uint32_t usage)
 254 {
 255         struct gbm_import_fd_data *fd_data = buffer;
 256         struct gbm_bo *bo;
 257         struct drm_prime_handle prime_handle;
 258         int ret;
 259
 260         if (type != GBM_BO_IMPORT_FD)
 261                 return NULL;
 262
 263         if (!gbm_device_is_format_supported(gbm, fd_data->format, usage))
 264                 return NULL;
 265
 266         /* This function can support only single plane formats. */
 267         /* If multi-plane import is desired, new function should be added. */
 268         if (gbm_num_planes_from_format(fd_data->format) != 1)
 269                 return NULL;
 270
 271         bo = gbm_bo_new(gbm, fd_data->width, fd_data->height, fd_data->format);
 272         if (!bo)
 273                 return NULL;
 274
 275         bo->strides[0] = fd_data->stride;
 276         bo->sizes[0] = fd_data->height * fd_data->stride;
 277
 278         prime_handle.fd = fd_data->fd;
 279
 280         ret = drmIoctl(bo->gbm->fd, DRM_IOCTL_PRIME_FD_TO_HANDLE, &prime_handle);
 281         if (ret) {
 282                 fprintf(stderr, "minigbm: DRM_IOCTL_PRIME_FD_TO_HANDLE failed "
 283                                 "(fd=%u)\n", prime_handle.fd);
 284                 free(bo);
 285                 return NULL;
 286         }
 287
 288         bo->handles[0].u32 = prime_handle.handle;
 289
 290         return bo;
 291 }
 292
 293 PUBLIC uint32_t
 294 gbm_bo_get_width(struct gbm_bo *bo)
 295 {
 296         return bo->width;
 297 }
 298
 299 PUBLIC uint32_t
 300 gbm_bo_get_height(struct gbm_bo *bo)
 301 {
 302         return bo->height;
 303 }
 304
 305 PUBLIC uint32_t
 306 gbm_bo_get_stride(struct gbm_bo *bo)
 307 {
 308         return gbm_bo_get_plane_stride(bo, 0);
 309 }
 310
 311 PUBLIC uint32_t
 312 gbm_bo_get_stride_or_tiling(struct gbm_bo *bo)
 313 {
 314         return bo->tiling ? bo->tiling : gbm_bo_get_stride(bo);
 315 }
 316
 317 PUBLIC uint32_t
 318 gbm_bo_get_format(struct gbm_bo *bo)
 319 {
 320         return bo->format;
 321 }
 322
 323 PUBLIC struct gbm_device *
 324 gbm_bo_get_device(struct gbm_bo *bo)
 325 {
 326         return bo->gbm;
 327 }
 328
 329 PUBLIC union gbm_bo_handle
 330 gbm_bo_get_handle(struct gbm_bo *bo)
 331 {
 332         return gbm_bo_get_plane_handle(bo, 0);
 333 }
 334
 335 PUBLIC int
 336 gbm_bo_get_fd(struct gbm_bo *bo)
 337 {
 338         return gbm_bo_get_plane_fd(bo, 0);
 339 }
 340
 341 PUBLIC size_t
 342 gbm_bo_get_num_planes(struct gbm_bo *bo)
 343 {
 344         return bo->num_planes;
 345 }
 346
 347 PUBLIC union gbm_bo_handle
 348 gbm_bo_get_plane_handle(struct gbm_bo *bo, size_t plane)
 349 {
 350         assert(plane < bo->num_planes);
 351         return bo->handles[plane];
 352 }
 353
 354 #ifndef DRM_RDWR
 355 #define DRM_RDWR O_RDWR
 356 #endif
 357
 358 PUBLIC int
 359 gbm_bo_get_plane_fd(struct gbm_bo *bo, size_t plane)
 360 {
 361         int fd;
 362         assert(plane < bo->num_planes);
 363
 364         if (drmPrimeHandleToFD(
 365                         gbm_device_get_fd(bo->gbm),
 366                         gbm_bo_get_plane_handle(bo, plane).u32,
 367                         DRM_CLOEXEC | DRM_RDWR,
 368                         &fd))
 369                 return -1;
 370         else
 371                 return fd;
 372 }
 373
 374 PUBLIC uint32_t
 375 gbm_bo_get_plane_offset(struct gbm_bo *bo, size_t plane)
 376 {
 377         assert(plane < bo->num_planes);
 378         return bo->offsets[plane];
 379 }
 380
 381 PUBLIC uint32_t
 382 gbm_bo_get_plane_size(struct gbm_bo *bo, size_t plane)
 383 {
 384         assert(plane < bo->num_planes);
 385         return bo->sizes[plane];
 386 }
 387
 388 PUBLIC uint32_t
 389 gbm_bo_get_plane_stride(struct gbm_bo *bo, size_t plane)
 390 {
 391         assert(plane < bo->num_planes);
 392         return bo->strides[plane];
 393 }
 394
 395 PUBLIC void
 396 gbm_bo_set_user_data(struct gbm_bo *bo, void *data,
 397                      void (*destroy_user_data)(struct gbm_bo *, void *))
 398 {
 399         bo->user_data = data;
 400         bo->destroy_user_data = destroy_user_data;
 401 }
 402
 403 PUBLIC void *
 404 gbm_bo_get_user_data(struct gbm_bo *bo)
 405 {
 406         return bo->user_data;
 407 }