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 <errno.h>
  34 #include <limits.h>
  35
  36 #include <sys/types.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 void
 127 swrast_get_drawable_info(__DRIdrawable *driDrawable,
 128                          int           *x,
 129                          int           *y,
 130                          int           *width,
 131                          int           *height,
 132                          void          *loaderPrivate)
 133 {
 134    struct gbm_dri_surface *surf = loaderPrivate;
 135
 136    *x = 0;
 137    *y = 0;
 138    *width = surf->base.width;
 139    *height = surf->base.height;
 140 }
 141
 142 static void
 143 swrast_put_image2(__DRIdrawable *driDrawable,
 144                   int            op,
 145                   int            x,
 146                   int            y,
 147                   int            width,
 148                   int            height,
 149                   int            stride,
 150                   char          *data,
 151                   void          *loaderPrivate)
 152 {
 153    struct gbm_dri_surface *surf = loaderPrivate;
 154    struct gbm_dri_device *dri = gbm_dri_device(surf->base.gbm);
 155
 156    dri->swrast_put_image2(driDrawable,
 157                           op, x, y,
 158                           width, height, stride,
 159                           data, surf->dri_private);
 160 }
 161
 162 static void
 163 swrast_put_image(__DRIdrawable *driDrawable,
 164                  int            op,
 165                  int            x,
 166                  int            y,
 167                  int            width,
 168                  int            height,
 169                  char          *data,
 170                  void          *loaderPrivate)
 171 {
 172    return swrast_put_image2(driDrawable, op, x, y, width, height,
 173                             width * 4, data, loaderPrivate);
 174 }
 175
 176 static void
 177 swrast_get_image(__DRIdrawable *driDrawable,
 178                  int            x,
 179                  int            y,
 180                  int            width,
 181                  int            height,
 182                  char          *data,
 183                  void          *loaderPrivate)
 184 {
 185    struct gbm_dri_surface *surf = loaderPrivate;
 186    struct gbm_dri_device *dri = gbm_dri_device(surf->base.gbm);
 187
 188    dri->swrast_get_image(driDrawable,
 189                          x, y,
 190                          width, height,
 191                          data, surf->dri_private);
 192 }
 193
 194 static const __DRIuseInvalidateExtension use_invalidate = {
 195    .base = { __DRI_USE_INVALIDATE, 1 }
 196 };
 197
 198 static const __DRIimageLookupExtension image_lookup_extension = {
 199    .base = { __DRI_IMAGE_LOOKUP, 1 },
 200
 201    .lookupEGLImage          = dri_lookup_egl_image
 202 };
 203
 204 static const __DRIdri2LoaderExtension dri2_loader_extension = {
 205    .base = { __DRI_DRI2_LOADER, 3 },
 206
 207    .getBuffers              = dri_get_buffers,
 208    .flushFrontBuffer        = dri_flush_front_buffer,
 209    .getBuffersWithFormat    = dri_get_buffers_with_format,
 210 };
 211
 212 static const __DRIimageLoaderExtension image_loader_extension = {
 213    .base = { __DRI_IMAGE_LOADER, 1 },
 214
 215    .getBuffers          = image_get_buffers,
 216    .flushFrontBuffer    = dri_flush_front_buffer,
 217 };
 218
 219 static const __DRIswrastLoaderExtension swrast_loader_extension = {
 220    .base = { __DRI_SWRAST_LOADER, 2 },
 221
 222    .getDrawableInfo = swrast_get_drawable_info,
 223    .putImage        = swrast_put_image,
 224    .getImage        = swrast_get_image,
 225    .putImage2       = swrast_put_image2
 226 };
 227
 228 static const __DRIextension *gbm_dri_screen_extensions[] = {
 229    &image_lookup_extension.base,
 230    &use_invalidate.base,
 231    &dri2_loader_extension.base,
 232    &image_loader_extension.base,
 233    &swrast_loader_extension.base,
 234    NULL,
 235 };
 236
 237 struct dri_extension_match {
 238    const char *name;
 239    int version;
 240    int offset;
 241 };
 242
 243 static struct dri_extension_match dri_core_extensions[] = {
 244    { __DRI2_FLUSH, 1, offsetof(struct gbm_dri_device, flush) },
 245    { __DRI_IMAGE, 1, offsetof(struct gbm_dri_device, image) },
 246    { NULL, 0, 0 }
 247 };
 248
 249 static struct dri_extension_match gbm_dri_device_extensions[] = {
 250    { __DRI_CORE, 1, offsetof(struct gbm_dri_device, core) },
 251    { __DRI_DRI2, 1, offsetof(struct gbm_dri_device, dri2) },
 252    { NULL, 0, 0 }
 253 };
 254
 255 static struct dri_extension_match gbm_swrast_device_extensions[] = {
 256    { __DRI_CORE, 1, offsetof(struct gbm_dri_device, core), },
 257    { __DRI_SWRAST, 1, offsetof(struct gbm_dri_device, swrast) },
 258    { NULL, 0, 0 }
 259 };
 260
 261 static int
 262 dri_bind_extensions(struct gbm_dri_device *dri,
 263                     struct dri_extension_match *matches,
 264                     const __DRIextension **extensions)
 265 {
 266    int i, j, ret = 0;
 267    void *field;
 268
 269    for (i = 0; extensions[i]; i++) {
 270       for (j = 0; matches[j].name; j++) {
 271          if (strcmp(extensions[i]->name, matches[j].name) == 0 &&
 272              extensions[i]->version >= matches[j].version) {
 273             field = ((char *) dri + matches[j].offset);
 274             *(const __DRIextension **) field = extensions[i];
 275          }
 276       }
 277    }
 278
 279    for (j = 0; matches[j].name; j++) {
 280       field = ((char *) dri + matches[j].offset);
 281       if (*(const __DRIextension **) field == NULL) {
 282          ret = -1;
 283       }
 284    }
 285
 286    return ret;
 287 }
 288
 289 static const __DRIextension **
 290 dri_open_driver(struct gbm_dri_device *dri)
 291 {
 292    const __DRIextension **extensions = NULL;
 293    char path[PATH_MAX], *search_paths, *p, *next, *end;
 294    char *get_extensions_name;
 295
 296    search_paths = NULL;
 297    /* don't allow setuid apps to use LIBGL_DRIVERS_PATH or GBM_DRIVERS_PATH */
 298    if (geteuid() == getuid()) {
 299       /* Read GBM_DRIVERS_PATH first for compatibility, but LIBGL_DRIVERS_PATH
 300        * is recommended over GBM_DRIVERS_PATH.
 301        */
 302       search_paths = getenv("GBM_DRIVERS_PATH");
 303
 304       /* Read LIBGL_DRIVERS_PATH if GBM_DRIVERS_PATH was not set.
 305        * LIBGL_DRIVERS_PATH is recommended over GBM_DRIVERS_PATH.
 306        */
 307       if (search_paths == NULL) {
 308          search_paths = getenv("LIBGL_DRIVERS_PATH");
 309       }
 310    }
 311    if (search_paths == NULL)
 312       search_paths = DEFAULT_DRIVER_DIR;
 313
 314    dri->driver = NULL;
 315    end = search_paths + strlen(search_paths);
 316    for (p = search_paths; p < end && dri->driver == NULL; p = next + 1) {
 317       int len;
 318       next = strchr(p, ':');
 319       if (next == NULL)
 320          next = end;
 321
 322       len = next - p;
 323 #if GLX_USE_TLS
 324       snprintf(path, sizeof path,
 325                "%.*s/tls/%s_dri.so", len, p, dri->base.driver_name);
 326       dri->driver = dlopen(path, RTLD_NOW | RTLD_GLOBAL);
 327 #endif
 328       if (dri->driver == NULL) {
 329          snprintf(path, sizeof path,
 330                   "%.*s/%s_dri.so", len, p, dri->base.driver_name);
 331          dri->driver = dlopen(path, RTLD_NOW | RTLD_GLOBAL);
 332       }
 333       /* not need continue to loop all paths once the driver is found */
 334       if (dri->driver != NULL)
 335          break;
 336    }
 337
 338    if (dri->driver == NULL) {
 339       fprintf(stderr, "gbm: failed to open any driver (search paths %s)\n",
 340               search_paths);
 341       fprintf(stderr, "gbm: Last dlopen error: %s\n", dlerror());
 342       return NULL;
 343    }
 344
 345    if (asprintf(&get_extensions_name, "%s_%s",
 346                 __DRI_DRIVER_GET_EXTENSIONS, dri->base.driver_name) != -1) {
 347       const __DRIextension **(*get_extensions)(void);
 348
 349       get_extensions = dlsym(dri->driver, get_extensions_name);
 350       free(get_extensions_name);
 351
 352       if (get_extensions)
 353          extensions = get_extensions();
 354    }
 355
 356    if (!extensions)
 357       extensions = dlsym(dri->driver, __DRI_DRIVER_EXTENSIONS);
 358    if (extensions == NULL) {
 359       fprintf(stderr, "gbm: driver exports no extensions (%s)", dlerror());
 360       dlclose(dri->driver);
 361    }
 362
 363    return extensions;
 364 }
 365
 366 static int
 367 dri_load_driver(struct gbm_dri_device *dri)
 368 {
 369    const __DRIextension **extensions;
 370
 371    extensions = dri_open_driver(dri);
 372    if (!extensions)
 373       return -1;
 374
 375    if (dri_bind_extensions(dri, gbm_dri_device_extensions, extensions) < 0) {
 376       dlclose(dri->driver);
 377       fprintf(stderr, "failed to bind extensions\n");
 378       return -1;
 379    }
 380
 381    dri->driver_extensions = extensions;
 382
 383    return 0;
 384 }
 385
 386 static int
 387 dri_load_driver_swrast(struct gbm_dri_device *dri)
 388 {
 389    const __DRIextension **extensions;
 390
 391    extensions = dri_open_driver(dri);
 392    if (!extensions)
 393       return -1;
 394
 395    if (dri_bind_extensions(dri, gbm_swrast_device_extensions, extensions) < 0) {
 396       dlclose(dri->driver);
 397       fprintf(stderr, "failed to bind extensions\n");
 398       return -1;
 399    }
 400
 401    dri->driver_extensions = extensions;
 402
 403    return 0;
 404 }
 405
 406 static int
 407 dri_screen_create_dri2(struct gbm_dri_device *dri,
 408                        const char *driver_name)
 409 {
 410    const __DRIextension **extensions;
 411    int ret = 0;
 412
 413    dri->base.driver_name = driver_name;
 414    if (dri->base.driver_name == NULL)
 415       return -1;
 416
 417    ret = dri_load_driver(dri);
 418    if (ret) {
 419       fprintf(stderr, "failed to load driver: %s\n", dri->base.driver_name);
 420       return ret;
 421    };
 422
 423    dri->extensions = gbm_dri_screen_extensions;
 424
 425    if (dri->dri2 == NULL)
 426       return -1;
 427
 428    if (dri->dri2->base.version >= 4) {
 429       dri->screen = dri->dri2->createNewScreen2(0, dri->base.base.fd,
 430                                                 dri->extensions,
 431                                                 dri->driver_extensions,
 432                                                 &dri->driver_configs, dri);
 433    } else {
 434       dri->screen = dri->dri2->createNewScreen(0, dri->base.base.fd,
 435                                                dri->extensions,
 436                                                &dri->driver_configs, dri);
 437    }
 438    if (dri->screen == NULL)
 439       return -1;
 440
 441    extensions = dri->core->getExtensions(dri->screen);
 442    if (dri_bind_extensions(dri, dri_core_extensions, extensions) < 0) {
 443       ret = -1;
 444       goto free_screen;
 445    }
 446
 447    dri->lookup_image = NULL;
 448    dri->lookup_user_data = NULL;
 449
 450    return 0;
 451
 452 free_screen:
 453    dri->core->destroyScreen(dri->screen);
 454
 455    return ret;
 456 }
 457
 458 static int
 459 dri_screen_create_swrast(struct gbm_dri_device *dri)
 460 {
 461    int ret;
 462
 463    dri->base.driver_name = strdup("swrast");
 464    if (dri->base.driver_name == NULL)
 465       return -1;
 466
 467    ret = dri_load_driver_swrast(dri);
 468    if (ret) {
 469       fprintf(stderr, "failed to load swrast driver\n");
 470       return ret;
 471    }
 472
 473    dri->extensions = gbm_dri_screen_extensions;
 474
 475    if (dri->swrast == NULL)
 476       return -1;
 477
 478    if (dri->swrast->base.version >= 4) {
 479       dri->screen = dri->swrast->createNewScreen2(0, dri->extensions,
 480                                                   dri->driver_extensions,
 481                                                   &dri->driver_configs, dri);
 482    } else {
 483       dri->screen = dri->swrast->createNewScreen(0, dri->extensions,
 484                                                  &dri->driver_configs, dri);
 485    }
 486    if (dri->screen == NULL)
 487       return -1;
 488
 489    dri->lookup_image = NULL;
 490    dri->lookup_user_data = NULL;
 491
 492    return 0;
 493 }
 494
 495 static int
 496 dri_screen_create(struct gbm_dri_device *dri)
 497 {
 498    const char *driver_name;
 499
 500    driver_name = loader_get_driver_for_fd(dri->base.base.fd, 0);
 501    if (!driver_name)
 502       return -1;
 503
 504    return dri_screen_create_dri2(dri, driver_name);
 505 }
 506
 507 static int
 508 dri_screen_create_sw(struct gbm_dri_device *dri)
 509 {
 510    const char *driver_name;
 511    int ret;
 512
 513    driver_name = strdup("kms_swrast");
 514    if (!driver_name)
 515       return -errno;
 516
 517    ret = dri_screen_create_dri2(dri, driver_name);
 518    if (ret == 0)
 519       return ret;
 520
 521    return dri_screen_create_swrast(dri);
 522 }
 523
 524 static int
 525 gbm_dri_is_format_supported(struct gbm_device *gbm,
 526                             uint32_t format,
 527                             uint32_t usage)
 528 {
 529    switch (format) {
 530    case GBM_BO_FORMAT_XRGB8888:
 531    case GBM_FORMAT_XRGB8888:
 532       break;
 533    case GBM_BO_FORMAT_ARGB8888:
 534    case GBM_FORMAT_ARGB8888:
 535       if (usage & GBM_BO_USE_SCANOUT)
 536          return 0;
 537       break;
 538    default:
 539       return 0;
 540    }
 541
 542    if (usage & GBM_BO_USE_CURSOR &&
 543        usage & GBM_BO_USE_RENDERING)
 544       return 0;
 545
 546    return 1;
 547 }
 548
 549 static int
 550 gbm_dri_bo_write(struct gbm_bo *_bo, const void *buf, size_t count)
 551 {
 552    struct gbm_dri_bo *bo = gbm_dri_bo(_bo);
 553
 554    if (bo->image != NULL) {
 555       errno = EINVAL;
 556       return -1;
 557    }
 558
 559    memcpy(bo->map, buf, count);
 560
 561    return 0;
 562 }
 563
 564 static int
 565 gbm_dri_bo_get_fd(struct gbm_bo *_bo)
 566 {
 567    struct gbm_dri_device *dri = gbm_dri_device(_bo->gbm);
 568    struct gbm_dri_bo *bo = gbm_dri_bo(_bo);
 569    int fd;
 570
 571    if (bo->image == NULL)
 572       return -1;
 573
 574    dri->image->queryImage(bo->image, __DRI_IMAGE_ATTRIB_FD, &fd);
 575
 576    return fd;
 577 }
 578
 579 static void
 580 gbm_dri_bo_destroy(struct gbm_bo *_bo)
 581 {
 582    struct gbm_dri_device *dri = gbm_dri_device(_bo->gbm);
 583    struct gbm_dri_bo *bo = gbm_dri_bo(_bo);
 584    struct drm_mode_destroy_dumb arg;
 585
 586    if (bo->image != NULL) {
 587       dri->image->destroyImage(bo->image);
 588    } else {
 589       gbm_dri_bo_unmap(bo);
 590       memset(&arg, 0, sizeof(arg));
 591       arg.handle = bo->handle;
 592       drmIoctl(dri->base.base.fd, DRM_IOCTL_MODE_DESTROY_DUMB, &arg);
 593    }
 594
 595    free(bo);
 596 }
 597
 598 static uint32_t
 599 gbm_dri_to_gbm_format(uint32_t dri_format)
 600 {
 601    uint32_t ret = 0;
 602
 603    switch (dri_format) {
 604    case __DRI_IMAGE_FORMAT_RGB565:
 605       ret = GBM_FORMAT_RGB565;
 606       break;
 607    case __DRI_IMAGE_FORMAT_XRGB8888:
 608       ret = GBM_FORMAT_XRGB8888;
 609       break;
 610    case __DRI_IMAGE_FORMAT_ARGB8888:
 611       ret = GBM_FORMAT_ARGB8888;
 612       break;
 613    case __DRI_IMAGE_FORMAT_ABGR8888:
 614       ret = GBM_FORMAT_ABGR8888;
 615       break;
 616    default:
 617       ret = 0;
 618       break;
 619    }
 620
 621    return ret;
 622 }
 623
 624 static struct gbm_bo *
 625 gbm_dri_bo_import(struct gbm_device *gbm,
 626                   uint32_t type, void *buffer, uint32_t usage)
 627 {
 628    struct gbm_dri_device *dri = gbm_dri_device(gbm);
 629    struct gbm_dri_bo *bo;
 630    __DRIimage *image;
 631    unsigned dri_use = 0;
 632    int gbm_format;
 633
 634    /* Required for query image WIDTH & HEIGHT */
 635    if (dri->image == NULL || dri->image->base.version < 4) {
 636       errno = ENOSYS;
 637       return NULL;
 638    }
 639
 640    switch (type) {
 641 #if HAVE_WAYLAND_PLATFORM
 642    case GBM_BO_IMPORT_WL_BUFFER:
 643    {
 644       struct wl_drm_buffer *wb;
 645
 646       if (!dri->wl_drm) {
 647          errno = EINVAL;
 648          return NULL;
 649       }
 650
 651       wb = wayland_drm_buffer_get(dri->wl_drm, (struct wl_resource *) buffer);
 652       if (!wb) {
 653          errno = EINVAL;
 654          return NULL;
 655       }
 656
 657       image = dri->image->dupImage(wb->driver_buffer, NULL);
 658
 659       switch (wb->format) {
 660       case WL_DRM_FORMAT_XRGB8888:
 661          gbm_format = GBM_FORMAT_XRGB8888;
 662          break;
 663       case WL_DRM_FORMAT_ARGB8888:
 664          gbm_format = GBM_FORMAT_ARGB8888;
 665          break;
 666       case WL_DRM_FORMAT_RGB565:
 667          gbm_format = GBM_FORMAT_RGB565;
 668          break;
 669       case WL_DRM_FORMAT_YUYV:
 670          gbm_format = GBM_FORMAT_YUYV;
 671          break;
 672       default:
 673          return NULL;
 674       }
 675       break;
 676    }
 677 #endif
 678
 679    case GBM_BO_IMPORT_EGL_IMAGE:
 680    {
 681       int dri_format;
 682       if (dri->lookup_image == NULL) {
 683          errno = EINVAL;
 684          return NULL;
 685       }
 686
 687       image = dri->lookup_image(dri->screen, buffer, dri->lookup_user_data);
 688       image = dri->image->dupImage(image, NULL);
 689       dri->image->queryImage(image, __DRI_IMAGE_ATTRIB_FORMAT, &dri_format);
 690       gbm_format = gbm_dri_to_gbm_format(dri_format);
 691       if (gbm_format == 0) {
 692          errno = EINVAL;
 693          return NULL;
 694       }
 695       break;
 696    }
 697
 698    case GBM_BO_IMPORT_FD:
 699    {
 700       struct gbm_import_fd_data *fd_data = buffer;
 701       int stride = fd_data->stride, offset = 0;
 702
 703       image = dri->image->createImageFromFds(dri->screen,
 704                                              fd_data->width,
 705                                              fd_data->height,
 706                                              fd_data->format,
 707                                              &fd_data->fd, 1,
 708                                              &stride, &offset,
 709                                              NULL);
 710       gbm_format = fd_data->format;
 711       break;
 712    }
 713
 714    default:
 715       errno = ENOSYS;
 716       return NULL;
 717    }
 718
 719
 720    bo = calloc(1, sizeof *bo);
 721    if (bo == NULL)
 722       return NULL;
 723
 724    bo->image = image;
 725
 726    if (usage & GBM_BO_USE_SCANOUT)
 727       dri_use |= __DRI_IMAGE_USE_SCANOUT;
 728    if (usage & GBM_BO_USE_CURSOR)
 729       dri_use |= __DRI_IMAGE_USE_CURSOR;
 730    if (dri->image->base.version >= 2 &&
 731        !dri->image->validateUsage(bo->image, dri_use)) {
 732       errno = EINVAL;
 733       free(bo);
 734       return NULL;
 735    }
 736
 737    bo->base.base.gbm = gbm;
 738    bo->base.base.format = gbm_format;
 739
 740    dri->image->queryImage(bo->image, __DRI_IMAGE_ATTRIB_WIDTH,
 741                           (int*)&bo->base.base.width);
 742    dri->image->queryImage(bo->image, __DRI_IMAGE_ATTRIB_HEIGHT,
 743                           (int*)&bo->base.base.height);
 744    dri->image->queryImage(bo->image, __DRI_IMAGE_ATTRIB_STRIDE,
 745                           (int*)&bo->base.base.stride);
 746    dri->image->queryImage(bo->image, __DRI_IMAGE_ATTRIB_HANDLE,
 747                           &bo->base.base.handle.s32);
 748
 749    return &bo->base.base;
 750 }
 751
 752 static struct gbm_bo *
 753 create_dumb(struct gbm_device *gbm,
 754                   uint32_t width, uint32_t height,
 755                   uint32_t format, uint32_t usage)
 756 {
 757    struct gbm_dri_device *dri = gbm_dri_device(gbm);
 758    struct drm_mode_create_dumb create_arg;
 759    struct gbm_dri_bo *bo;
 760    struct drm_mode_destroy_dumb destroy_arg;
 761    int ret;
 762    int is_cursor, is_scanout;
 763
 764    is_cursor = (usage & GBM_BO_USE_CURSOR) != 0 &&
 765       format == GBM_FORMAT_ARGB8888;
 766    is_scanout = (usage & GBM_BO_USE_SCANOUT) != 0 &&
 767       format == GBM_FORMAT_XRGB8888;
 768    if (!is_cursor && !is_scanout) {
 769       errno = EINVAL;
 770       return NULL;
 771    }
 772
 773    bo = calloc(1, sizeof *bo);
 774    if (bo == NULL)
 775       return NULL;
 776
 777    create_arg.bpp = 32;
 778    create_arg.width = width;
 779    create_arg.height = height;
 780
 781    ret = drmIoctl(dri->base.base.fd, DRM_IOCTL_MODE_CREATE_DUMB, &create_arg);
 782    if (ret)
 783       goto free_bo;
 784
 785    bo->base.base.gbm = gbm;
 786    bo->base.base.width = width;
 787    bo->base.base.height = height;
 788    bo->base.base.stride = create_arg.pitch;
 789    bo->base.base.format = format;
 790    bo->base.base.handle.u32 = create_arg.handle;
 791    bo->handle = create_arg.handle;
 792    bo->size = create_arg.size;
 793
 794    if (gbm_dri_bo_map(bo) == NULL)
 795       goto destroy_dumb;
 796
 797    return &bo->base.base;
 798
 799 destroy_dumb:
 800    memset(&destroy_arg, 0, sizeof destroy_arg);
 801    destroy_arg.handle = create_arg.handle;
 802    drmIoctl(dri->base.base.fd, DRM_IOCTL_MODE_DESTROY_DUMB, &destroy_arg);
 803 free_bo:
 804    free(bo);
 805
 806    return NULL;
 807 }
 808
 809 static struct gbm_bo *
 810 gbm_dri_bo_create(struct gbm_device *gbm,
 811                   uint32_t width, uint32_t height,
 812                   uint32_t format, uint32_t usage)
 813 {
 814    struct gbm_dri_device *dri = gbm_dri_device(gbm);
 815    struct gbm_dri_bo *bo;
 816    int dri_format;
 817    unsigned dri_use = 0;
 818
 819    if (usage & GBM_BO_USE_WRITE || dri->image == NULL)
 820       return create_dumb(gbm, width, height, format, usage);
 821
 822    bo = calloc(1, sizeof *bo);
 823    if (bo == NULL)
 824       return NULL;
 825
 826    bo->base.base.gbm = gbm;
 827    bo->base.base.width = width;
 828    bo->base.base.height = height;
 829    bo->base.base.format = format;
 830
 831    switch (format) {
 832    case GBM_FORMAT_RGB565:
 833       dri_format =__DRI_IMAGE_FORMAT_RGB565;
 834       break;
 835    case GBM_FORMAT_XRGB8888:
 836    case GBM_BO_FORMAT_XRGB8888:
 837       dri_format = __DRI_IMAGE_FORMAT_XRGB8888;
 838       break;
 839    case GBM_FORMAT_ARGB8888:
 840    case GBM_BO_FORMAT_ARGB8888:
 841       dri_format = __DRI_IMAGE_FORMAT_ARGB8888;
 842       break;
 843    case GBM_FORMAT_ABGR8888:
 844       dri_format = __DRI_IMAGE_FORMAT_ABGR8888;
 845       break;
 846    case GBM_FORMAT_ARGB2101010:
 847       dri_format = __DRI_IMAGE_FORMAT_ARGB2101010;
 848       break;
 849    case GBM_FORMAT_XRGB2101010:
 850       dri_format = __DRI_IMAGE_FORMAT_XRGB2101010;
 851       break;
 852    default:
 853       errno = EINVAL;
 854       goto failed;
 855    }
 856
 857    if (usage & GBM_BO_USE_SCANOUT)
 858       dri_use |= __DRI_IMAGE_USE_SCANOUT;
 859    if (usage & GBM_BO_USE_CURSOR)
 860       dri_use |= __DRI_IMAGE_USE_CURSOR;
 861
 862    /* Gallium drivers requires shared in order to get the handle/stride */
 863    dri_use |= __DRI_IMAGE_USE_SHARE;
 864
 865    bo->image =
 866       dri->image->createImage(dri->screen,
 867                               width, height,
 868                               dri_format, dri_use,
 869                               bo);
 870    if (bo->image == NULL)
 871       goto failed;
 872
 873    dri->image->queryImage(bo->image, __DRI_IMAGE_ATTRIB_HANDLE,
 874                           &bo->base.base.handle.s32);
 875    dri->image->queryImage(bo->image, __DRI_IMAGE_ATTRIB_STRIDE,
 876                           (int *) &bo->base.base.stride);
 877
 878    return &bo->base.base;
 879
 880 failed:
 881    free(bo);
 882    return NULL;
 883 }
 884
 885 static struct gbm_surface *
 886 gbm_dri_surface_create(struct gbm_device *gbm,
 887                        uint32_t width, uint32_t height,
 888                        uint32_t format, uint32_t flags)
 889 {
 890    struct gbm_dri_surface *surf;
 891
 892    surf = calloc(1, sizeof *surf);
 893    if (surf == NULL)
 894       return NULL;
 895
 896    surf->base.gbm = gbm;
 897    surf->base.width = width;
 898    surf->base.height = height;
 899    surf->base.format = format;
 900    surf->base.flags = flags;
 901
 902    return &surf->base;
 903 }
 904
 905 static void
 906 gbm_dri_surface_destroy(struct gbm_surface *_surf)
 907 {
 908    struct gbm_dri_surface *surf = gbm_dri_surface(_surf);
 909
 910    free(surf);
 911 }
 912
 913 static void
 914 dri_destroy(struct gbm_device *gbm)
 915 {
 916    struct gbm_dri_device *dri = gbm_dri_device(gbm);
 917
 918    dri->core->destroyScreen(dri->screen);
 919    free(dri->driver_configs);
 920    dlclose(dri->driver);
 921    free(dri->base.driver_name);
 922
 923    free(dri);
 924 }
 925
 926 static struct gbm_device *
 927 dri_device_create(int fd)
 928 {
 929    struct gbm_dri_device *dri;
 930    int ret, force_sw;
 931
 932    dri = calloc(1, sizeof *dri);
 933    if (!dri)
 934       return NULL;
 935
 936    dri->base.base.fd = fd;
 937    dri->base.base.bo_create = gbm_dri_bo_create;
 938    dri->base.base.bo_import = gbm_dri_bo_import;
 939    dri->base.base.is_format_supported = gbm_dri_is_format_supported;
 940    dri->base.base.bo_write = gbm_dri_bo_write;
 941    dri->base.base.bo_get_fd = gbm_dri_bo_get_fd;
 942    dri->base.base.bo_destroy = gbm_dri_bo_destroy;
 943    dri->base.base.destroy = dri_destroy;
 944    dri->base.base.surface_create = gbm_dri_surface_create;
 945    dri->base.base.surface_destroy = gbm_dri_surface_destroy;
 946
 947    dri->base.type = GBM_DRM_DRIVER_TYPE_DRI;
 948    dri->base.base.name = "drm";
 949
 950    force_sw = getenv("GBM_ALWAYS_SOFTWARE") != NULL;
 951    if (!force_sw) {
 952       ret = dri_screen_create(dri);
 953       if (ret)
 954          ret = dri_screen_create_sw(dri);
 955    } else {
 956       ret = dri_screen_create_sw(dri);
 957    }
 958
 959    if (ret)
 960       goto err_dri;
 961
 962    return &dri->base.base;
 963
 964 err_dri:
 965    free(dri);
 966
 967    return NULL;
 968 }
 969
 970 struct gbm_backend gbm_dri_backend = {
 971    .backend_name = "dri",
 972    .create_device = dri_device_create,
 973 };