src/egl/drivers/dri2/platform_drm.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  *    Kristian Høgsberg <krh@bitplanet.net>
  26  */
  27
  28 #include <stdint.h>
  29 #include <stdlib.h>
  30 #include <stdio.h>
  31 #include <string.h>
  32 #include <xf86drm.h>
  33 #include <dlfcn.h>
  34 #include <sys/types.h>
  35 #include <sys/stat.h>
  36 #include <fcntl.h>
  37 #include <unistd.h>
  38
  39 #include "egl_dri2.h"
  40 #include "egl_dri2_fallbacks.h"
  41 #include "loader.h"
  42
  43 static struct gbm_bo *
  44 lock_front_buffer(struct gbm_surface *_surf)
  45 {
  46    struct gbm_dri_surface *surf = (struct gbm_dri_surface *) _surf;
  47    struct dri2_egl_surface *dri2_surf = surf->dri_private;
  48    struct gbm_dri_device *device = (struct gbm_dri_device *) _surf->gbm;
  49    struct gbm_bo *bo;
  50
  51    if (dri2_surf->current == NULL) {
  52       _eglError(EGL_BAD_SURFACE, "no front buffer");
  53       return NULL;
  54    }
  55
  56    bo = dri2_surf->current->bo;
  57
  58    if (device->dri2) {
  59       dri2_surf->current->locked = true;
  60       dri2_surf->current = NULL;
  61    }
  62
  63    return bo;
  64 }
  65
  66 static void
  67 release_buffer(struct gbm_surface *_surf, struct gbm_bo *bo)
  68 {
  69    struct gbm_dri_surface *surf = (struct gbm_dri_surface *) _surf;
  70    struct dri2_egl_surface *dri2_surf = surf->dri_private;
  71
  72    for (unsigned i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++) {
  73       if (dri2_surf->color_buffers[i].bo == bo) {
  74          dri2_surf->color_buffers[i].locked = false;
  75          break;
  76       }
  77    }
  78 }
  79
  80 static int
  81 has_free_buffers(struct gbm_surface *_surf)
  82 {
  83    struct gbm_dri_surface *surf = (struct gbm_dri_surface *) _surf;
  84    struct dri2_egl_surface *dri2_surf = surf->dri_private;
  85
  86    for (unsigned i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++)
  87       if (!dri2_surf->color_buffers[i].locked)
  88          return 1;
  89
  90    return 0;
  91 }
  92
  93 static _EGLSurface *
  94 dri2_drm_create_window_surface(_EGLDriver *drv, _EGLDisplay *disp,
  95                                _EGLConfig *conf, void *native_surface,
  96                                const EGLint *attrib_list)
  97 {
  98    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
  99    struct dri2_egl_config *dri2_conf = dri2_egl_config(conf);
 100    struct dri2_egl_surface *dri2_surf;
 101    struct gbm_surface *surface = native_surface;
 102    struct gbm_dri_surface *surf;
 103    const __DRIconfig *config;
 104
 105    (void) drv;
 106
 107    dri2_surf = calloc(1, sizeof *dri2_surf);
 108    if (!dri2_surf) {
 109       _eglError(EGL_BAD_ALLOC, "dri2_create_surface");
 110       return NULL;
 111    }
 112
 113    if (!_eglInitSurface(&dri2_surf->base, disp, EGL_WINDOW_BIT, conf, attrib_list))
 114       goto cleanup_surf;
 115
 116    surf = gbm_dri_surface(surface);
 117    dri2_surf->gbm_surf = surf;
 118    dri2_surf->base.Width =  surf->base.width;
 119    dri2_surf->base.Height = surf->base.height;
 120    surf->dri_private = dri2_surf;
 121
 122    config = dri2_get_dri_config(dri2_conf, EGL_WINDOW_BIT,
 123                                 dri2_surf->base.GLColorspace);
 124
 125    if (dri2_dpy->dri2) {
 126       dri2_surf->dri_drawable =
 127          dri2_dpy->dri2->createNewDrawable(dri2_dpy->dri_screen, config,
 128                                            dri2_surf->gbm_surf);
 129
 130    } else {
 131       assert(dri2_dpy->swrast != NULL);
 132
 133       dri2_surf->dri_drawable =
 134          dri2_dpy->swrast->createNewDrawable(dri2_dpy->dri_screen, config,
 135                                              dri2_surf->gbm_surf);
 136
 137    }
 138    if (dri2_surf->dri_drawable == NULL) {
 139       _eglError(EGL_BAD_ALLOC, "createNewDrawable()");
 140       goto cleanup_surf;
 141    }
 142
 143    return &dri2_surf->base;
 144
 145  cleanup_surf:
 146    free(dri2_surf);
 147
 148    return NULL;
 149 }
 150
 151 static _EGLSurface *
 152 dri2_drm_create_pixmap_surface(_EGLDriver *drv, _EGLDisplay *disp,
 153                                _EGLConfig *conf, void *native_window,
 154                                const EGLint *attrib_list)
 155 {
 156    /* From the EGL_MESA_platform_gbm spec, version 5:
 157     *
 158     *  It is not valid to call eglCreatePlatformPixmapSurfaceEXT with a <dpy>
 159     *  that belongs to the GBM platform. Any such call fails and generates
 160     *  EGL_BAD_PARAMETER.
 161     */
 162    _eglError(EGL_BAD_PARAMETER, "cannot create EGL pixmap surfaces on GBM");
 163    return NULL;
 164 }
 165
 166 static EGLBoolean
 167 dri2_drm_destroy_surface(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf)
 168 {
 169    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 170    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 171
 172    dri2_dpy->core->destroyDrawable(dri2_surf->dri_drawable);
 173
 174    for (unsigned i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++) {
 175       if (dri2_surf->color_buffers[i].bo)
 176          gbm_bo_destroy(dri2_surf->color_buffers[i].bo);
 177    }
 178
 179    dri2_egl_surface_free_local_buffers(dri2_surf);
 180
 181    free(surf);
 182
 183    return EGL_TRUE;
 184 }
 185
 186 static int
 187 get_back_bo(struct dri2_egl_surface *dri2_surf)
 188 {
 189    struct dri2_egl_display *dri2_dpy =
 190       dri2_egl_display(dri2_surf->base.Resource.Display);
 191    struct gbm_dri_surface *surf = dri2_surf->gbm_surf;
 192    int age = 0;
 193
 194    if (dri2_surf->back == NULL) {
 195       for (unsigned i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++) {
 196          if (!dri2_surf->color_buffers[i].locked &&
 197               dri2_surf->color_buffers[i].age >= age) {
 198             dri2_surf->back = &dri2_surf->color_buffers[i];
 199             age = dri2_surf->color_buffers[i].age;
 200          }
 201       }
 202    }
 203
 204    if (dri2_surf->back == NULL)
 205       return -1;
 206    if (dri2_surf->back->bo == NULL) {
 207       if (surf->base.modifiers)
 208          dri2_surf->back->bo = gbm_bo_create_with_modifiers(&dri2_dpy->gbm_dri->base,
 209                                                             surf->base.width,
 210                                                             surf->base.height,
 211                                                             surf->base.format,
 212                                                             surf->base.modifiers,
 213                                                             surf->base.count);
 214       else
 215          dri2_surf->back->bo = gbm_bo_create(&dri2_dpy->gbm_dri->base,
 216                                              surf->base.width,
 217                                              surf->base.height,
 218                                              surf->base.format,
 219                                              surf->base.flags);
 220
 221    }
 222    if (dri2_surf->back->bo == NULL)
 223       return -1;
 224
 225    return 0;
 226 }
 227
 228 static int
 229 get_swrast_front_bo(struct dri2_egl_surface *dri2_surf)
 230 {
 231    struct dri2_egl_display *dri2_dpy =
 232       dri2_egl_display(dri2_surf->base.Resource.Display);
 233    struct gbm_dri_surface *surf = dri2_surf->gbm_surf;
 234
 235    if (dri2_surf->current == NULL) {
 236       assert(!dri2_surf->color_buffers[0].locked);
 237       dri2_surf->current = &dri2_surf->color_buffers[0];
 238    }
 239
 240    if (dri2_surf->current->bo == NULL)
 241       dri2_surf->current->bo = gbm_bo_create(&dri2_dpy->gbm_dri->base,
 242                                              surf->base.width, surf->base.height,
 243                                              surf->base.format, surf->base.flags);
 244    if (dri2_surf->current->bo == NULL)
 245       return -1;
 246
 247    return 0;
 248 }
 249
 250 static void
 251 back_bo_to_dri_buffer(struct dri2_egl_surface *dri2_surf, __DRIbuffer *buffer)
 252 {
 253    struct dri2_egl_display *dri2_dpy =
 254       dri2_egl_display(dri2_surf->base.Resource.Display);
 255    struct gbm_dri_bo *bo;
 256    int name, pitch;
 257
 258    bo = (struct gbm_dri_bo *) dri2_surf->back->bo;
 259
 260    dri2_dpy->image->queryImage(bo->image, __DRI_IMAGE_ATTRIB_NAME, &name);
 261    dri2_dpy->image->queryImage(bo->image, __DRI_IMAGE_ATTRIB_STRIDE, &pitch);
 262
 263    buffer->attachment = __DRI_BUFFER_BACK_LEFT;
 264    buffer->name = name;
 265    buffer->pitch = pitch;
 266    buffer->cpp = 4;
 267    buffer->flags = 0;
 268 }
 269
 270 static __DRIbuffer *
 271 dri2_drm_get_buffers_with_format(__DRIdrawable *driDrawable,
 272                                  int *width, int *height,
 273                                  unsigned int *attachments, int count,
 274                                  int *out_count, void *loaderPrivate)
 275 {
 276    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 277    int i, j;
 278
 279    for (i = 0, j = 0; i < 2 * count; i += 2, j++) {
 280       __DRIbuffer *local;
 281
 282       assert(attachments[i] < __DRI_BUFFER_COUNT);
 283       assert(j < ARRAY_SIZE(dri2_surf->buffers));
 284
 285       switch (attachments[i]) {
 286       case __DRI_BUFFER_BACK_LEFT:
 287          if (get_back_bo(dri2_surf) < 0) {
 288             _eglError(EGL_BAD_ALLOC, "failed to allocate color buffer");
 289             return NULL;
 290          }
 291          back_bo_to_dri_buffer(dri2_surf, &dri2_surf->buffers[j]);
 292          break;
 293       default:
 294          local = dri2_egl_surface_alloc_local_buffer(dri2_surf, attachments[i],
 295                                                      attachments[i + 1]);
 296
 297          if (!local) {
 298             _eglError(EGL_BAD_ALLOC, "failed to allocate local buffer");
 299             return NULL;
 300          }
 301          dri2_surf->buffers[j] = *local;
 302          break;
 303       }
 304    }
 305
 306    *out_count = j;
 307    if (j == 0)
 308       return NULL;
 309
 310    *width = dri2_surf->base.Width;
 311    *height = dri2_surf->base.Height;
 312
 313    return dri2_surf->buffers;
 314 }
 315
 316 static __DRIbuffer *
 317 dri2_drm_get_buffers(__DRIdrawable * driDrawable,
 318                      int *width, int *height,
 319                      unsigned int *attachments, int count,
 320                      int *out_count, void *loaderPrivate)
 321 {
 322    unsigned int *attachments_with_format;
 323    __DRIbuffer *buffer;
 324    const unsigned int format = 32;
 325
 326    attachments_with_format = calloc(count, 2 * sizeof(unsigned int));
 327    if (!attachments_with_format) {
 328       *out_count = 0;
 329       return NULL;
 330    }
 331
 332    for (int i = 0; i < count; ++i) {
 333       attachments_with_format[2*i] = attachments[i];
 334       attachments_with_format[2*i + 1] = format;
 335    }
 336
 337    buffer =
 338       dri2_drm_get_buffers_with_format(driDrawable,
 339                                        width, height,
 340                                        attachments_with_format, count,
 341                                        out_count, loaderPrivate);
 342
 343    free(attachments_with_format);
 344
 345    return buffer;
 346 }
 347
 348 static int
 349 dri2_drm_image_get_buffers(__DRIdrawable *driDrawable,
 350                            unsigned int format,
 351                            uint32_t *stamp,
 352                            void *loaderPrivate,
 353                            uint32_t buffer_mask,
 354                            struct __DRIimageList *buffers)
 355 {
 356    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 357    struct gbm_dri_bo *bo;
 358
 359    if (get_back_bo(dri2_surf) < 0)
 360       return 0;
 361
 362    bo = (struct gbm_dri_bo *) dri2_surf->back->bo;
 363    buffers->image_mask = __DRI_IMAGE_BUFFER_BACK;
 364    buffers->back = bo->image;
 365
 366    return 1;
 367 }
 368
 369 static void
 370 dri2_drm_flush_front_buffer(__DRIdrawable * driDrawable, void *loaderPrivate)
 371 {
 372    (void) driDrawable;
 373    (void) loaderPrivate;
 374 }
 375
 376 static EGLBoolean
 377 dri2_drm_swap_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw)
 378 {
 379    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 380    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 381
 382    if (!dri2_dpy->flush) {
 383       dri2_dpy->core->swapBuffers(dri2_surf->dri_drawable);
 384       return EGL_TRUE;
 385    }
 386
 387    if (dri2_surf->base.Type == EGL_WINDOW_BIT) {
 388       if (dri2_surf->current)
 389          _eglError(EGL_BAD_SURFACE, "dri2_swap_buffers");
 390       for (unsigned i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++)
 391          if (dri2_surf->color_buffers[i].age > 0)
 392             dri2_surf->color_buffers[i].age++;
 393
 394       /* Make sure we have a back buffer in case we're swapping without
 395        * ever rendering. */
 396       if (get_back_bo(dri2_surf) < 0)
 397          return _eglError(EGL_BAD_ALLOC, "dri2_swap_buffers");
 398
 399       dri2_surf->current = dri2_surf->back;
 400       dri2_surf->current->age = 1;
 401       dri2_surf->back = NULL;
 402    }
 403
 404    dri2_flush_drawable_for_swapbuffers(disp, draw);
 405    dri2_dpy->flush->invalidate(dri2_surf->dri_drawable);
 406
 407    return EGL_TRUE;
 408 }
 409
 410 static EGLint
 411 dri2_drm_query_buffer_age(_EGLDriver *drv,
 412                           _EGLDisplay *disp, _EGLSurface *surface)
 413 {
 414    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surface);
 415
 416    if (get_back_bo(dri2_surf) < 0) {
 417       _eglError(EGL_BAD_ALLOC, "dri2_query_buffer_age");
 418       return -1;
 419    }
 420
 421    return dri2_surf->back->age;
 422 }
 423
 424 static _EGLImage *
 425 dri2_drm_create_image_khr_pixmap(_EGLDisplay *disp, _EGLContext *ctx,
 426                                  EGLClientBuffer buffer, const EGLint *attr_list)
 427 {
 428    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 429    struct gbm_dri_bo *dri_bo = gbm_dri_bo((struct gbm_bo *) buffer);
 430    struct dri2_egl_image *dri2_img;
 431
 432    dri2_img = malloc(sizeof *dri2_img);
 433    if (!dri2_img) {
 434       _eglError(EGL_BAD_ALLOC, "dri2_create_image_khr_pixmap");
 435       return NULL;
 436    }
 437
 438    _eglInitImage(&dri2_img->base, disp);
 439
 440    dri2_img->dri_image = dri2_dpy->image->dupImage(dri_bo->image, dri2_img);
 441    if (dri2_img->dri_image == NULL) {
 442       free(dri2_img);
 443       _eglError(EGL_BAD_ALLOC, "dri2_create_image_khr_pixmap");
 444       return NULL;
 445    }
 446
 447    return &dri2_img->base;
 448 }
 449
 450 static _EGLImage *
 451 dri2_drm_create_image_khr(_EGLDriver *drv, _EGLDisplay *disp,
 452                           _EGLContext *ctx, EGLenum target,
 453                           EGLClientBuffer buffer, const EGLint *attr_list)
 454 {
 455    (void) drv;
 456
 457    switch (target) {
 458    case EGL_NATIVE_PIXMAP_KHR:
 459       return dri2_drm_create_image_khr_pixmap(disp, ctx, buffer, attr_list);
 460    default:
 461       return dri2_create_image_khr(drv, disp, ctx, target, buffer, attr_list);
 462    }
 463 }
 464
 465 static int
 466 dri2_drm_authenticate(_EGLDisplay *disp, uint32_t id)
 467 {
 468    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 469
 470    return drmAuthMagic(dri2_dpy->fd, id);
 471 }
 472
 473 static void
 474 swrast_put_image2(__DRIdrawable *driDrawable,
 475                   int            op,
 476                   int            x,
 477                   int            y,
 478                   int            width,
 479                   int            height,
 480                   int            stride,
 481                   char          *data,
 482                   void          *loaderPrivate)
 483 {
 484    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 485    int internal_stride;
 486    struct gbm_dri_bo *bo;
 487    uint32_t bpp;
 488    int x_bytes, width_bytes;
 489    char *src, *dst;
 490
 491    if (op != __DRI_SWRAST_IMAGE_OP_DRAW &&
 492        op != __DRI_SWRAST_IMAGE_OP_SWAP)
 493       return;
 494
 495    if (get_swrast_front_bo(dri2_surf) < 0)
 496       return;
 497
 498    bo = gbm_dri_bo(dri2_surf->current->bo);
 499
 500    bpp = gbm_bo_get_bpp(&bo->base);
 501    if (bpp == 0)
 502       return;
 503
 504    x_bytes = x * (bpp >> 3);
 505    width_bytes = width * (bpp >> 3);
 506
 507    if (gbm_dri_bo_map_dumb(bo) == NULL)
 508       return;
 509
 510    internal_stride = bo->base.stride;
 511
 512    dst = bo->map + x_bytes + (y * internal_stride);
 513    src = data;
 514
 515    for (int i = 0; i < height; i++) {
 516       memcpy(dst, src, width_bytes);
 517       dst += internal_stride;
 518       src += stride;
 519    }
 520
 521    gbm_dri_bo_unmap_dumb(bo);
 522 }
 523
 524 static void
 525 swrast_get_image(__DRIdrawable *driDrawable,
 526                  int            x,
 527                  int            y,
 528                  int            width,
 529                  int            height,
 530                  char          *data,
 531                  void          *loaderPrivate)
 532 {
 533    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 534    int internal_stride, stride;
 535    struct gbm_dri_bo *bo;
 536    uint32_t bpp;
 537    int x_bytes, width_bytes;
 538    char *src, *dst;
 539
 540    if (get_swrast_front_bo(dri2_surf) < 0)
 541       return;
 542
 543    bo = gbm_dri_bo(dri2_surf->current->bo);
 544
 545    bpp = gbm_bo_get_bpp(&bo->base);
 546    if (bpp == 0)
 547       return;
 548
 549    x_bytes = x * (bpp >> 3);
 550    width_bytes = width * (bpp >> 3);
 551
 552    internal_stride = bo->base.stride;
 553    stride = width_bytes;
 554
 555    if (gbm_dri_bo_map_dumb(bo) == NULL)
 556       return;
 557
 558    dst = data;
 559    src = bo->map + x_bytes + (y * internal_stride);
 560
 561    for (int i = 0; i < height; i++) {
 562       memcpy(dst, src, width_bytes);
 563       dst += stride;
 564       src += internal_stride;
 565    }
 566
 567    gbm_dri_bo_unmap_dumb(bo);
 568 }
 569
 570 static EGLBoolean
 571 drm_add_configs_for_visuals(_EGLDriver *drv, _EGLDisplay *disp)
 572 {
 573    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 574    static const struct {
 575       int format;
 576       unsigned int red_mask;
 577       unsigned int alpha_mask;
 578    } visuals[] = {
 579       { GBM_FORMAT_XRGB2101010, 0x3ff00000, 0x00000000 },
 580       { GBM_FORMAT_ARGB2101010, 0x3ff00000, 0xc0000000 },
 581       { GBM_FORMAT_XRGB8888,    0x00ff0000, 0x00000000 },
 582       { GBM_FORMAT_ARGB8888,    0x00ff0000, 0xff000000 },
 583       { GBM_FORMAT_RGB565,      0x0000f800, 0x00000000 },
 584    };
 585
 586    unsigned int format_count[ARRAY_SIZE(visuals)] = { 0 };
 587    unsigned int config_count = 0;
 588
 589    for (unsigned i = 0; dri2_dpy->driver_configs[i]; i++) {
 590       unsigned int red, alpha;
 591
 592       dri2_dpy->core->getConfigAttrib(dri2_dpy->driver_configs[i],
 593                                       __DRI_ATTRIB_RED_MASK, &red);
 594       dri2_dpy->core->getConfigAttrib(dri2_dpy->driver_configs[i],
 595                                       __DRI_ATTRIB_ALPHA_MASK, &alpha);
 596
 597       for (unsigned j = 0; j < ARRAY_SIZE(visuals); j++) {
 598          struct dri2_egl_config *dri2_conf;
 599
 600          if (visuals[j].red_mask != red || visuals[j].alpha_mask != alpha)
 601             continue;
 602
 603          const EGLint attr_list[] = {
 604             EGL_NATIVE_VISUAL_ID,  visuals[j].format,
 605             EGL_NONE,
 606          };
 607
 608          dri2_conf = dri2_add_config(disp, dri2_dpy->driver_configs[i],
 609                config_count + 1, EGL_WINDOW_BIT, attr_list, NULL);
 610          if (dri2_conf) {
 611             if (dri2_conf->base.ConfigID == config_count + 1)
 612                config_count++;
 613             format_count[j]++;
 614          }
 615       }
 616    }
 617
 618    for (unsigned i = 0; i < ARRAY_SIZE(format_count); i++) {
 619       if (!format_count[i]) {
 620          _eglLog(_EGL_DEBUG, "No DRI config supports native format 0x%x",
 621                  visuals[i].format);
 622       }
 623    }
 624
 625    return (config_count != 0);
 626 }
 627
 628 static const struct dri2_egl_display_vtbl dri2_drm_display_vtbl = {
 629    .authenticate = dri2_drm_authenticate,
 630    .create_window_surface = dri2_drm_create_window_surface,
 631    .create_pixmap_surface = dri2_drm_create_pixmap_surface,
 632    .create_pbuffer_surface = dri2_fallback_create_pbuffer_surface,
 633    .destroy_surface = dri2_drm_destroy_surface,
 634    .create_image = dri2_drm_create_image_khr,
 635    .swap_interval = dri2_fallback_swap_interval,
 636    .swap_buffers = dri2_drm_swap_buffers,
 637    .swap_buffers_with_damage = dri2_fallback_swap_buffers_with_damage,
 638    .swap_buffers_region = dri2_fallback_swap_buffers_region,
 639    .set_damage_region = dri2_fallback_set_damage_region,
 640    .post_sub_buffer = dri2_fallback_post_sub_buffer,
 641    .copy_buffers = dri2_fallback_copy_buffers,
 642    .query_buffer_age = dri2_drm_query_buffer_age,
 643    .create_wayland_buffer_from_image = dri2_fallback_create_wayland_buffer_from_image,
 644    .get_sync_values = dri2_fallback_get_sync_values,
 645    .get_dri_drawable = dri2_surface_get_dri_drawable,
 646 };
 647
 648 EGLBoolean
 649 dri2_initialize_drm(_EGLDriver *drv, _EGLDisplay *disp)
 650 {
 651    struct dri2_egl_display *dri2_dpy;
 652    struct gbm_device *gbm;
 653    const char *err;
 654
 655    loader_set_logger(_eglLog);
 656
 657    dri2_dpy = calloc(1, sizeof *dri2_dpy);
 658    if (!dri2_dpy)
 659       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
 660
 661    dri2_dpy->fd = -1;
 662    disp->DriverData = (void *) dri2_dpy;
 663
 664    gbm = disp->PlatformDisplay;
 665    if (gbm == NULL) {
 666       char buf[64];
 667       int n = snprintf(buf, sizeof(buf), DRM_DEV_NAME, DRM_DIR_NAME, 0);
 668       if (n != -1 && n < sizeof(buf))
 669          dri2_dpy->fd = loader_open_device(buf);
 670       gbm = gbm_create_device(dri2_dpy->fd);
 671       if (gbm == NULL) {
 672          err = "DRI2: failed to create gbm device";
 673          goto cleanup;
 674       }
 675       dri2_dpy->own_device = true;
 676    } else {
 677       dri2_dpy->fd = fcntl(gbm_device_get_fd(gbm), F_DUPFD_CLOEXEC, 3);
 678       if (dri2_dpy->fd < 0) {
 679          err = "DRI2: failed to fcntl() existing gbm device";
 680          goto cleanup;
 681       }
 682    }
 683
 684    if (strcmp(gbm_device_get_backend_name(gbm), "drm") != 0) {
 685       err = "DRI2: gbm device using incorrect/incompatible backend";
 686       goto cleanup;
 687    }
 688
 689    dri2_dpy->gbm_dri = gbm_dri_device(gbm);
 690    dri2_dpy->driver_name = strdup(dri2_dpy->gbm_dri->driver_name);
 691
 692    dri2_dpy->dri_screen = dri2_dpy->gbm_dri->screen;
 693    dri2_dpy->core = dri2_dpy->gbm_dri->core;
 694    dri2_dpy->dri2 = dri2_dpy->gbm_dri->dri2;
 695    dri2_dpy->swrast = dri2_dpy->gbm_dri->swrast;
 696    dri2_dpy->driver_configs = dri2_dpy->gbm_dri->driver_configs;
 697
 698    dri2_dpy->gbm_dri->lookup_image = dri2_lookup_egl_image;
 699    dri2_dpy->gbm_dri->lookup_user_data = disp;
 700
 701    dri2_dpy->gbm_dri->get_buffers = dri2_drm_get_buffers;
 702    dri2_dpy->gbm_dri->flush_front_buffer = dri2_drm_flush_front_buffer;
 703    dri2_dpy->gbm_dri->get_buffers_with_format = dri2_drm_get_buffers_with_format;
 704    dri2_dpy->gbm_dri->image_get_buffers = dri2_drm_image_get_buffers;
 705    dri2_dpy->gbm_dri->swrast_put_image2 = swrast_put_image2;
 706    dri2_dpy->gbm_dri->swrast_get_image = swrast_get_image;
 707
 708    dri2_dpy->gbm_dri->base.surface_lock_front_buffer = lock_front_buffer;
 709    dri2_dpy->gbm_dri->base.surface_release_buffer = release_buffer;
 710    dri2_dpy->gbm_dri->base.surface_has_free_buffers = has_free_buffers;
 711
 712    if (!dri2_setup_extensions(disp)) {
 713       err = "DRI2: failed to find required DRI extensions";
 714       goto cleanup;
 715    }
 716
 717    dri2_setup_screen(disp);
 718
 719    if (!drm_add_configs_for_visuals(drv, disp)) {
 720       err = "DRI2: failed to add configs";
 721       goto cleanup;
 722    }
 723
 724    disp->Extensions.KHR_image_pixmap = EGL_TRUE;
 725    if (dri2_dpy->dri2)
 726       disp->Extensions.EXT_buffer_age = EGL_TRUE;
 727
 728 #ifdef HAVE_WAYLAND_PLATFORM
 729    dri2_dpy->device_name = loader_get_device_name_for_fd(dri2_dpy->fd);
 730 #endif
 731    dri2_set_WL_bind_wayland_display(drv, disp);
 732
 733    /* Fill vtbl last to prevent accidentally calling virtual function during
 734     * initialization.
 735     */
 736    dri2_dpy->vtbl = &dri2_drm_display_vtbl;
 737
 738    return EGL_TRUE;
 739
 740 cleanup:
 741    dri2_display_destroy(disp);
 742    return _eglError(EGL_NOT_INITIALIZED, err);
 743 }