src/gbm/backends/dri/gbm_dri.c

   1 /*
   2  * Copyright © 2011 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,
  16  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  17  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  18  * NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
  19  * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
  20  * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  22  * DEALINGS IN THE SOFTWARE.
  23  *
  24  * Authors:
  25  *    Benjamin Franzke <benjaminfranzke@googlemail.com>
  26  */
  27
  28 #include <stdio.h>
  29 #include <stdlib.h>
  30 #include <stddef.h>
  31 #include <stdint.h>
  32 #include <string.h>
  33 #include <limits.h>
  34
  35 #include <sys/types.h>
  36 #include <sys/mman.h>
  37 #include <unistd.h>
  38 #include <dlfcn.h>
  39 #include <xf86drm.h>
  40
  41 #include <GL/gl.h> /* dri_interface needs GL types */
  42 #include <GL/internal/dri_interface.h>
  43
  44 #include "gbm_driint.h"
  45
  46 #include "gbmint.h"
  47 #include "loader.h"
  48
  49 /* For importing wl_buffer */
  50 #if HAVE_WAYLAND_PLATFORM
  51 #include "../../../egl/wayland/wayland-drm/wayland-drm.h"
  52 #endif
  53
  54 static __DRIimage *
  55 dri_lookup_egl_image(__DRIscreen *screen, void *image, void *data)
  56 {
  57    struct gbm_dri_device *dri = data;
  58
  59    if (dri->lookup_image == NULL)
  60       return NULL;
  61
  62    return dri->lookup_image(screen, image, dri->lookup_user_data);
  63 }
  64
  65 static __DRIbuffer *
  66 dri_get_buffers(__DRIdrawable * driDrawable,
  67                  int *width, int *height,
  68                  unsigned int *attachments, int count,
  69                  int *out_count, void *data)
  70 {
  71    struct gbm_dri_surface *surf = data;
  72    struct gbm_dri_device *dri = gbm_dri_device(surf->base.gbm);
  73
  74    if (dri->get_buffers == NULL)
  75       return NULL;
  76
  77    return dri->get_buffers(driDrawable, width, height, attachments,
  78                            count, out_count, surf->dri_private);
  79 }
  80
  81 static void
  82 dri_flush_front_buffer(__DRIdrawable * driDrawable, void *data)
  83 {
  84    struct gbm_dri_surface *surf = data;
  85    struct gbm_dri_device *dri = gbm_dri_device(surf->base.gbm);
  86
  87    if (dri->flush_front_buffer != NULL)
  88       dri->flush_front_buffer(driDrawable, surf->dri_private);
  89 }
  90
  91 static __DRIbuffer *
  92 dri_get_buffers_with_format(__DRIdrawable * driDrawable,
  93                             int *width, int *height,
  94                             unsigned int *attachments, int count,
  95                             int *out_count, void *data)
  96 {
  97    struct gbm_dri_surface *surf = data;
  98    struct gbm_dri_device *dri = gbm_dri_device(surf->base.gbm);
  99
 100    if (dri->get_buffers_with_format == NULL)
 101       return NULL;
 102
 103    return
 104       dri->get_buffers_with_format(driDrawable, width, height, attachments,
 105                                    count, out_count, surf->dri_private);
 106 }
 107
 108 static int
 109 image_get_buffers(__DRIdrawable *driDrawable,
 110                   unsigned int format,
 111                   uint32_t *stamp,
 112                   void *loaderPrivate,
 113                   uint32_t buffer_mask,
 114                   struct __DRIimageList *buffers)
 115 {
 116    struct gbm_dri_surface *surf = loaderPrivate;
 117    struct gbm_dri_device *dri = gbm_dri_device(surf->base.gbm);
 118
 119    if (dri->image_get_buffers == NULL)
 120       return 0;
 121
 122    return dri->image_get_buffers(driDrawable, format, stamp,
 123                                  surf->dri_private, buffer_mask, buffers);
 124 }
 125
 126 static const __DRIuseInvalidateExtension use_invalidate = {
 127    { __DRI_USE_INVALIDATE, 1 }
 128 };
 129
 130 static const __DRIimageLookupExtension image_lookup_extension = {
 131    { __DRI_IMAGE_LOOKUP, 1 },
 132    dri_lookup_egl_image
 133 };
 134
 135 static const __DRIdri2LoaderExtension dri2_loader_extension = {
 136    .base = { __DRI_DRI2_LOADER, 3 },
 137
 138    .getBuffers              = dri_get_buffers,
 139    .flushFrontBuffer        = dri_flush_front_buffer,
 140    .getBuffersWithFormat    = dri_get_buffers_with_format,
 141 };
 142
 143 static const __DRIimageLoaderExtension image_loader_extension = {
 144    .base = { __DRI_IMAGE_LOADER, 1 },
 145
 146    .getBuffers          = image_get_buffers,
 147    .flushFrontBuffer    = dri_flush_front_buffer,
 148 };
 149
 150
 151 struct dri_extension_match {
 152    const char *name;
 153    int version;
 154    int offset;
 155 };
 156
 157 static struct dri_extension_match dri_core_extensions[] = {
 158    { __DRI2_FLUSH, 1, offsetof(struct gbm_dri_device, flush) },
 159    { __DRI_IMAGE, 1, offsetof(struct gbm_dri_device, image) },
 160    { NULL, 0, 0 }
 161 };
 162
 163 static struct dri_extension_match gbm_dri_device_extensions[] = {
 164    { __DRI_CORE, 1, offsetof(struct gbm_dri_device, core) },
 165    { __DRI_DRI2, 1, offsetof(struct gbm_dri_device, dri2) },
 166    { NULL, 0, 0 }
 167 };
 168
 169 static int
 170 dri_bind_extensions(struct gbm_dri_device *dri,
 171                     struct dri_extension_match *matches,
 172                     const __DRIextension **extensions)
 173 {
 174    int i, j, ret = 0;
 175    void *field;
 176
 177    for (i = 0; extensions[i]; i++) {
 178       for (j = 0; matches[j].name; j++) {
 179          if (strcmp(extensions[i]->name, matches[j].name) == 0 &&
 180              extensions[i]->version >= matches[j].version) {
 181             field = ((char *) dri + matches[j].offset);
 182             *(const __DRIextension **) field = extensions[i];
 183          }
 184       }
 185    }
 186
 187    for (j = 0; matches[j].name; j++) {
 188       field = ((char *) dri + matches[j].offset);
 189       if (*(const __DRIextension **) field == NULL) {
 190          ret = -1;
 191       }
 192    }
 193
 194    return ret;
 195 }
 196
 197 static int
 198 dri_load_driver(struct gbm_dri_device *dri)
 199 {
 200    const __DRIextension **extensions = NULL;
 201    char path[PATH_MAX], *search_paths, *p, *next, *end;
 202    char *get_extensions_name;
 203
 204    search_paths = NULL;
 205    if (geteuid() == getuid()) {
 206       /* don't allow setuid apps to use GBM_DRIVERS_PATH */
 207       search_paths = getenv("GBM_DRIVERS_PATH");
 208    }
 209    if (search_paths == NULL)
 210       search_paths = DEFAULT_DRIVER_DIR;
 211
 212    dri->driver = NULL;
 213    end = search_paths + strlen(search_paths);
 214    for (p = search_paths; p < end && dri->driver == NULL; p = next + 1) {
 215       int len;
 216       next = strchr(p, ':');
 217       if (next == NULL)
 218          next = end;
 219
 220       len = next - p;
 221 #if GLX_USE_TLS
 222       snprintf(path, sizeof path,
 223                "%.*s/tls/%s_dri.so", len, p, dri->base.driver_name);
 224       dri->driver = dlopen(path, RTLD_NOW | RTLD_GLOBAL);
 225 #endif
 226       if (dri->driver == NULL) {
 227          snprintf(path, sizeof path,
 228                   "%.*s/%s_dri.so", len, p, dri->base.driver_name);
 229          dri->driver = dlopen(path, RTLD_NOW | RTLD_GLOBAL);
 230       }
 231       /* not need continue to loop all paths once the driver is found */
 232       if (dri->driver != NULL)
 233          break;
 234    }
 235
 236    if (dri->driver == NULL) {
 237       fprintf(stderr, "gbm: failed to open any driver (search paths %s)",
 238               search_paths);
 239       return -1;
 240    }
 241
 242    if (asprintf(&get_extensions_name, "%s_%s",
 243                 __DRI_DRIVER_GET_EXTENSIONS, dri->base.driver_name) != -1) {
 244       const __DRIextension **(*get_extensions)(void);
 245
 246       get_extensions = dlsym(dri->driver, get_extensions_name);
 247       free(get_extensions_name);
 248
 249       if (get_extensions)
 250          extensions = get_extensions();
 251    }
 252
 253    if (!extensions)
 254       extensions = dlsym(dri->driver, __DRI_DRIVER_EXTENSIONS);
 255    if (extensions == NULL) {
 256       fprintf(stderr, "gbm: driver exports no extensions (%s)", dlerror());
 257       dlclose(dri->driver);
 258       return -1;
 259    }
 260    dri->driver_extensions = extensions;
 261
 262    if (dri_bind_extensions(dri, gbm_dri_device_extensions, extensions) < 0) {
 263       dlclose(dri->driver);
 264       fprintf(stderr, "failed to bind extensions\n");
 265       return -1;
 266    }
 267
 268    return 0;
 269 }
 270
 271 static int
 272 dri_screen_create(struct gbm_dri_device *dri)
 273 {
 274    const __DRIextension **extensions;
 275    int ret = 0;
 276
 277    dri->base.driver_name = loader_get_driver_for_fd(dri->base.base.fd, 0);
 278    if (dri->base.driver_name == NULL)
 279       return -1;
 280
 281    ret = dri_load_driver(dri);
 282    if (ret) {
 283       fprintf(stderr, "failed to load driver: %s\n", dri->base.driver_name);
 284       return ret;
 285    };
 286
 287    dri->extensions[0] = &image_lookup_extension.base;
 288    dri->extensions[1] = &use_invalidate.base;
 289    dri->extensions[2] = &dri2_loader_extension.base;
 290    dri->extensions[3] = &image_loader_extension.base;
 291    dri->extensions[4] = NULL;
 292
 293    if (dri->dri2 == NULL)
 294       return -1;
 295
 296    if (dri->dri2->base.version >= 4) {
 297       dri->screen = dri->dri2->createNewScreen2(0, dri->base.base.fd,
 298                                                 dri->extensions,
 299                                                 dri->driver_extensions,
 300                                                 &dri->driver_configs, dri);
 301    } else {
 302       dri->screen = dri->dri2->createNewScreen(0, dri->base.base.fd,
 303                                                dri->extensions,
 304                                                &dri->driver_configs, dri);
 305    }
 306    if (dri->screen == NULL)
 307       return -1;
 308
 309    extensions = dri->core->getExtensions(dri->screen);
 310    if (dri_bind_extensions(dri, dri_core_extensions, extensions) < 0) {
 311       ret = -1;
 312       goto free_screen;
 313    }
 314
 315    dri->lookup_image = NULL;
 316    dri->lookup_user_data = NULL;
 317
 318    return 0;
 319
 320 free_screen:
 321    dri->core->destroyScreen(dri->screen);
 322
 323    return ret;
 324 }
 325
 326 static int
 327 gbm_dri_is_format_supported(struct gbm_device *gbm,
 328                             uint32_t format,
 329                             uint32_t usage)
 330 {
 331    switch (format) {
 332    case GBM_BO_FORMAT_XRGB8888:
 333    case GBM_FORMAT_XRGB8888:
 334       break;
 335    case GBM_BO_FORMAT_ARGB8888:
 336    case GBM_FORMAT_ARGB8888:
 337       if (usage & GBM_BO_USE_SCANOUT)
 338          return 0;
 339       break;
 340    default:
 341       return 0;
 342    }
 343
 344    if (usage & GBM_BO_USE_CURSOR_64X64 &&
 345        usage & GBM_BO_USE_RENDERING)
 346       return 0;
 347
 348    return 1;
 349 }
 350
 351 static int
 352 gbm_dri_bo_write(struct gbm_bo *_bo, const void *buf, size_t count)
 353 {
 354    struct gbm_dri_bo *bo = gbm_dri_bo(_bo);
 355
 356    if (bo->image != NULL)
 357       return -1;
 358
 359    memcpy(bo->map, buf, count);
 360
 361    return 0;
 362 }
 363
 364 static void
 365 gbm_dri_bo_destroy(struct gbm_bo *_bo)
 366 {
 367    struct gbm_dri_device *dri = gbm_dri_device(_bo->gbm);
 368    struct gbm_dri_bo *bo = gbm_dri_bo(_bo);
 369    struct drm_mode_destroy_dumb arg;
 370
 371    if (bo->image != NULL) {
 372       dri->image->destroyImage(bo->image);
 373    } else {
 374       munmap(bo->map, bo->size);
 375       memset(&arg, 0, sizeof(arg));
 376       arg.handle = bo->handle;
 377       drmIoctl(dri->base.base.fd, DRM_IOCTL_MODE_DESTROY_DUMB, &arg);
 378    }
 379
 380    free(bo);
 381 }
 382
 383 static uint32_t
 384 gbm_dri_to_gbm_format(uint32_t dri_format)
 385 {
 386    uint32_t ret = 0;
 387
 388    switch (dri_format) {
 389    case __DRI_IMAGE_FORMAT_RGB565:
 390       ret = GBM_FORMAT_RGB565;
 391       break;
 392    case __DRI_IMAGE_FORMAT_XRGB8888:
 393       ret = GBM_FORMAT_XRGB8888;
 394       break;
 395    case __DRI_IMAGE_FORMAT_ARGB8888:
 396       ret = GBM_FORMAT_ARGB8888;
 397       break;
 398    case __DRI_IMAGE_FORMAT_ABGR8888:
 399       ret = GBM_FORMAT_ABGR8888;
 400       break;
 401    default:
 402       ret = 0;
 403       break;
 404    }
 405
 406    return ret;
 407 }
 408
 409 static struct gbm_bo *
 410 gbm_dri_bo_import(struct gbm_device *gbm,
 411                   uint32_t type, void *buffer, uint32_t usage)
 412 {
 413    struct gbm_dri_device *dri = gbm_dri_device(gbm);
 414    struct gbm_dri_bo *bo;
 415    __DRIimage *image;
 416    unsigned dri_use = 0;
 417    int gbm_format;
 418
 419    /* Required for query image WIDTH & HEIGHT */
 420    if (dri->image->base.version < 4)
 421       return NULL;
 422
 423    switch (type) {
 424 #if HAVE_WAYLAND_PLATFORM
 425    case GBM_BO_IMPORT_WL_BUFFER:
 426    {
 427       struct wl_drm_buffer *wb;
 428
 429       if (!dri->wl_drm)
 430          return NULL;
 431
 432       wb = wayland_drm_buffer_get(dri->wl_drm, (struct wl_resource *) buffer);
 433       if (!wb)
 434          return NULL;
 435
 436       image = wb->driver_buffer;
 437
 438       switch (wb->format) {
 439       case WL_DRM_FORMAT_XRGB8888:
 440          gbm_format = GBM_FORMAT_XRGB8888;
 441          break;
 442       case WL_DRM_FORMAT_ARGB8888:
 443          gbm_format = GBM_FORMAT_ARGB8888;
 444          break;
 445       case WL_DRM_FORMAT_RGB565:
 446          gbm_format = GBM_FORMAT_RGB565;
 447          break;
 448       case WL_DRM_FORMAT_YUYV:
 449          gbm_format = GBM_FORMAT_YUYV;
 450          break;
 451       default:
 452          return NULL;
 453       }
 454       break;
 455    }
 456 #endif
 457
 458    case GBM_BO_IMPORT_EGL_IMAGE:
 459    {
 460       int dri_format;
 461       if (dri->lookup_image == NULL)
 462          return NULL;
 463
 464       image = dri->lookup_image(dri->screen, buffer, dri->lookup_user_data);
 465       dri->image->queryImage(image, __DRI_IMAGE_ATTRIB_FORMAT, &dri_format);
 466       gbm_format = gbm_dri_to_gbm_format(dri_format);
 467       if (gbm_format == 0)
 468          return NULL;
 469       break;
 470    }
 471
 472    default:
 473       return NULL;
 474    }
 475
 476
 477    bo = calloc(1, sizeof *bo);
 478    if (bo == NULL)
 479       return NULL;
 480
 481    bo->image = dri->image->dupImage(image, NULL);
 482
 483    if (usage & GBM_BO_USE_SCANOUT)
 484       dri_use |= __DRI_IMAGE_USE_SCANOUT;
 485    if (usage & GBM_BO_USE_CURSOR_64X64)
 486       dri_use |= __DRI_IMAGE_USE_CURSOR;
 487    if (dri->image->base.version >= 2 &&
 488        !dri->image->validateUsage(bo->image, dri_use)) {
 489       free(bo);
 490       return NULL;
 491    }
 492
 493    bo->base.base.gbm = gbm;
 494    bo->base.base.format = gbm_format;
 495
 496    dri->image->queryImage(bo->image, __DRI_IMAGE_ATTRIB_WIDTH,
 497                           (int*)&bo->base.base.width);
 498    dri->image->queryImage(bo->image, __DRI_IMAGE_ATTRIB_HEIGHT,
 499                           (int*)&bo->base.base.height);
 500    dri->image->queryImage(bo->image, __DRI_IMAGE_ATTRIB_STRIDE,
 501                           (int*)&bo->base.base.stride);
 502    dri->image->queryImage(bo->image, __DRI_IMAGE_ATTRIB_HANDLE,
 503                           &bo->base.base.handle.s32);
 504
 505    return &bo->base.base;
 506 }
 507
 508 static struct gbm_bo *
 509 create_dumb(struct gbm_device *gbm,
 510                   uint32_t width, uint32_t height,
 511                   uint32_t format, uint32_t usage)
 512 {
 513    struct gbm_dri_device *dri = gbm_dri_device(gbm);
 514    struct drm_mode_create_dumb create_arg;
 515    struct drm_mode_map_dumb map_arg;
 516    struct gbm_dri_bo *bo;
 517    struct drm_mode_destroy_dumb destroy_arg;
 518    int ret;
 519
 520    if (!(usage & GBM_BO_USE_CURSOR_64X64))
 521       return NULL;
 522    if (format != GBM_FORMAT_ARGB8888)
 523       return NULL;
 524
 525    bo = calloc(1, sizeof *bo);
 526    if (bo == NULL)
 527       return NULL;
 528
 529    create_arg.bpp = 32;
 530    create_arg.width = width;
 531    create_arg.height = height;
 532
 533    ret = drmIoctl(dri->base.base.fd, DRM_IOCTL_MODE_CREATE_DUMB, &create_arg);
 534    if (ret)
 535       goto free_bo;
 536
 537    bo->base.base.gbm = gbm;
 538    bo->base.base.width = width;
 539    bo->base.base.height = height;
 540    bo->base.base.stride = create_arg.pitch;
 541    bo->base.base.format = format;
 542    bo->base.base.handle.u32 = create_arg.handle;
 543    bo->handle = create_arg.handle;
 544    bo->size = create_arg.size;
 545
 546    memset(&map_arg, 0, sizeof(map_arg));
 547    map_arg.handle = bo->handle;
 548
 549    ret = drmIoctl(dri->base.base.fd, DRM_IOCTL_MODE_MAP_DUMB, &map_arg);
 550    if (ret)
 551       goto destroy_dumb;
 552
 553    bo->map = mmap(0, bo->size, PROT_WRITE,
 554                   MAP_SHARED, dri->base.base.fd, map_arg.offset);
 555    if (bo->map == MAP_FAILED)
 556       goto destroy_dumb;
 557
 558    return &bo->base.base;
 559
 560 destroy_dumb:
 561    memset(&destroy_arg, 0, sizeof destroy_arg);
 562    destroy_arg.handle = create_arg.handle;
 563    drmIoctl(dri->base.base.fd, DRM_IOCTL_MODE_DESTROY_DUMB, &destroy_arg);
 564 free_bo:
 565    free(bo);
 566
 567    return NULL;
 568 }
 569
 570 static struct gbm_bo *
 571 gbm_dri_bo_create(struct gbm_device *gbm,
 572                   uint32_t width, uint32_t height,
 573                   uint32_t format, uint32_t usage)
 574 {
 575    struct gbm_dri_device *dri = gbm_dri_device(gbm);
 576    struct gbm_dri_bo *bo;
 577    int dri_format;
 578    unsigned dri_use = 0;
 579
 580    if (usage & GBM_BO_USE_WRITE)
 581       return create_dumb(gbm, width, height, format, usage);
 582
 583    bo = calloc(1, sizeof *bo);
 584    if (bo == NULL)
 585       return NULL;
 586
 587    bo->base.base.gbm = gbm;
 588    bo->base.base.width = width;
 589    bo->base.base.height = height;
 590    bo->base.base.format = format;
 591
 592    switch (format) {
 593    case GBM_FORMAT_RGB565:
 594       dri_format =__DRI_IMAGE_FORMAT_RGB565;
 595       break;
 596    case GBM_FORMAT_XRGB8888:
 597    case GBM_BO_FORMAT_XRGB8888:
 598       dri_format = __DRI_IMAGE_FORMAT_XRGB8888;
 599       break;
 600    case GBM_FORMAT_ARGB8888:
 601    case GBM_BO_FORMAT_ARGB8888:
 602       dri_format = __DRI_IMAGE_FORMAT_ARGB8888;
 603       break;
 604    case GBM_FORMAT_ABGR8888:
 605       dri_format = __DRI_IMAGE_FORMAT_ABGR8888;
 606       break;
 607    case GBM_FORMAT_ARGB2101010:
 608       dri_format = __DRI_IMAGE_FORMAT_ARGB2101010;
 609       break;
 610    case GBM_FORMAT_XRGB2101010:
 611       dri_format = __DRI_IMAGE_FORMAT_XRGB2101010;
 612       break;
 613    default:
 614       return NULL;
 615    }
 616
 617    if (usage & GBM_BO_USE_SCANOUT)
 618       dri_use |= __DRI_IMAGE_USE_SCANOUT;
 619    if (usage & GBM_BO_USE_CURSOR_64X64)
 620       dri_use |= __DRI_IMAGE_USE_CURSOR;
 621
 622    /* Gallium drivers requires shared in order to get the handle/stride */
 623    dri_use |= __DRI_IMAGE_USE_SHARE;
 624
 625    bo->image =
 626       dri->image->createImage(dri->screen,
 627                               width, height,
 628                               dri_format, dri_use,
 629                               bo);
 630    if (bo->image == NULL)
 631       return NULL;
 632
 633    dri->image->queryImage(bo->image, __DRI_IMAGE_ATTRIB_HANDLE,
 634                           &bo->base.base.handle.s32);
 635    dri->image->queryImage(bo->image, __DRI_IMAGE_ATTRIB_STRIDE,
 636                           (int *) &bo->base.base.stride);
 637
 638    return &bo->base.base;
 639 }
 640
 641 static struct gbm_surface *
 642 gbm_dri_surface_create(struct gbm_device *gbm,
 643                        uint32_t width, uint32_t height,
 644                        uint32_t format, uint32_t flags)
 645 {
 646    struct gbm_dri_surface *surf;
 647
 648    surf = calloc(1, sizeof *surf);
 649    if (surf == NULL)
 650       return NULL;
 651
 652    surf->base.gbm = gbm;
 653    surf->base.width = width;
 654    surf->base.height = height;
 655    surf->base.format = format;
 656    surf->base.flags = flags;
 657
 658    return &surf->base;
 659 }
 660
 661 static void
 662 gbm_dri_surface_destroy(struct gbm_surface *_surf)
 663 {
 664    struct gbm_dri_surface *surf = gbm_dri_surface(_surf);
 665
 666    free(surf);
 667 }
 668
 669 static void
 670 dri_destroy(struct gbm_device *gbm)
 671 {
 672    struct gbm_dri_device *dri = gbm_dri_device(gbm);
 673
 674    dri->core->destroyScreen(dri->screen);
 675    free(dri->driver_configs);
 676    dlclose(dri->driver);
 677    free(dri->base.driver_name);
 678
 679    free(dri);
 680 }
 681
 682 static struct gbm_device *
 683 dri_device_create(int fd)
 684 {
 685    struct gbm_dri_device *dri;
 686    int ret;
 687
 688    dri = calloc(1, sizeof *dri);
 689
 690    dri->base.base.fd = fd;
 691    dri->base.base.bo_create = gbm_dri_bo_create;
 692    dri->base.base.bo_import = gbm_dri_bo_import;
 693    dri->base.base.is_format_supported = gbm_dri_is_format_supported;
 694    dri->base.base.bo_write = gbm_dri_bo_write;
 695    dri->base.base.bo_destroy = gbm_dri_bo_destroy;
 696    dri->base.base.destroy = dri_destroy;
 697    dri->base.base.surface_create = gbm_dri_surface_create;
 698    dri->base.base.surface_destroy = gbm_dri_surface_destroy;
 699
 700    dri->base.type = GBM_DRM_DRIVER_TYPE_DRI;
 701    dri->base.base.name = "drm";
 702
 703    ret = dri_screen_create(dri);
 704    if (ret)
 705       goto err_dri;
 706
 707    return &dri->base.base;
 708
 709 err_dri:
 710    free(dri);
 711
 712    return NULL;
 713 }
 714
 715 struct gbm_backend gbm_dri_backend = {
 716    .backend_name = "dri",
 717    .create_device = dri_device_create,
 718 };