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    /* Temporarily work around dri driver libs that need symbols in libglapi
 315     * but don't automatically link it in.
 316     */
 317    /* XXX: Library name differs on per platforms basis. Update this as
 318     * osx/cygwin/windows/bsd gets support for GBM..
 319     */
 320    dlopen("libglapi.so.0", RTLD_LAZY | RTLD_GLOBAL);
 321
 322    dri->driver = NULL;
 323    end = search_paths + strlen(search_paths);
 324    for (p = search_paths; p < end && dri->driver == NULL; p = next + 1) {
 325       int len;
 326       next = strchr(p, ':');
 327       if (next == NULL)
 328          next = end;
 329
 330       len = next - p;
 331 #if GLX_USE_TLS
 332       snprintf(path, sizeof path,
 333                "%.*s/tls/%s_dri.so", len, p, dri->base.driver_name);
 334       dri->driver = dlopen(path, RTLD_NOW | RTLD_GLOBAL);
 335 #endif
 336       if (dri->driver == NULL) {
 337          snprintf(path, sizeof path,
 338                   "%.*s/%s_dri.so", len, p, dri->base.driver_name);
 339          dri->driver = dlopen(path, RTLD_NOW | RTLD_GLOBAL);
 340       }
 341       /* not need continue to loop all paths once the driver is found */
 342       if (dri->driver != NULL)
 343          break;
 344    }
 345
 346    if (dri->driver == NULL) {
 347       fprintf(stderr, "gbm: failed to open any driver (search paths %s)\n",
 348               search_paths);
 349       fprintf(stderr, "gbm: Last dlopen error: %s\n", dlerror());
 350       return NULL;
 351    }
 352
 353    if (asprintf(&get_extensions_name, "%s_%s",
 354                 __DRI_DRIVER_GET_EXTENSIONS, dri->base.driver_name) != -1) {
 355       const __DRIextension **(*get_extensions)(void);
 356
 357       get_extensions = dlsym(dri->driver, get_extensions_name);
 358       free(get_extensions_name);
 359
 360       if (get_extensions)
 361          extensions = get_extensions();
 362    }
 363
 364    if (!extensions)
 365       extensions = dlsym(dri->driver, __DRI_DRIVER_EXTENSIONS);
 366    if (extensions == NULL) {
 367       fprintf(stderr, "gbm: driver exports no extensions (%s)", dlerror());
 368       dlclose(dri->driver);
 369    }
 370
 371    return extensions;
 372 }
 373
 374 static int
 375 dri_load_driver(struct gbm_dri_device *dri)
 376 {
 377    const __DRIextension **extensions;
 378
 379    extensions = dri_open_driver(dri);
 380    if (!extensions)
 381       return -1;
 382
 383    if (dri_bind_extensions(dri, gbm_dri_device_extensions, extensions) < 0) {
 384       dlclose(dri->driver);
 385       fprintf(stderr, "failed to bind extensions\n");
 386       return -1;
 387    }
 388
 389    dri->driver_extensions = extensions;
 390
 391    return 0;
 392 }
 393
 394 static int
 395 dri_load_driver_swrast(struct gbm_dri_device *dri)
 396 {
 397    const __DRIextension **extensions;
 398
 399    extensions = dri_open_driver(dri);
 400    if (!extensions)
 401       return -1;
 402
 403    if (dri_bind_extensions(dri, gbm_swrast_device_extensions, extensions) < 0) {
 404       dlclose(dri->driver);
 405       fprintf(stderr, "failed to bind extensions\n");
 406       return -1;
 407    }
 408
 409    dri->driver_extensions = extensions;
 410
 411    return 0;
 412 }
 413
 414 static int
 415 dri_screen_create_dri2(struct gbm_dri_device *dri, char *driver_name)
 416 {
 417    const __DRIextension **extensions;
 418    int ret = 0;
 419
 420    dri->base.driver_name = driver_name;
 421    if (dri->base.driver_name == NULL)
 422       return -1;
 423
 424    ret = dri_load_driver(dri);
 425    if (ret) {
 426       fprintf(stderr, "failed to load driver: %s\n", dri->base.driver_name);
 427       return ret;
 428    };
 429
 430    dri->extensions = gbm_dri_screen_extensions;
 431
 432    if (dri->dri2 == NULL)
 433       return -1;
 434
 435    if (dri->dri2->base.version >= 4) {
 436       dri->screen = dri->dri2->createNewScreen2(0, dri->base.base.fd,
 437                                                 dri->extensions,
 438                                                 dri->driver_extensions,
 439                                                 &dri->driver_configs, dri);
 440    } else {
 441       dri->screen = dri->dri2->createNewScreen(0, dri->base.base.fd,
 442                                                dri->extensions,
 443                                                &dri->driver_configs, dri);
 444    }
 445    if (dri->screen == NULL)
 446       return -1;
 447
 448    extensions = dri->core->getExtensions(dri->screen);
 449    if (dri_bind_extensions(dri, dri_core_extensions, extensions) < 0) {
 450       ret = -1;
 451       goto free_screen;
 452    }
 453
 454    dri->lookup_image = NULL;
 455    dri->lookup_user_data = NULL;
 456
 457    return 0;
 458
 459 free_screen:
 460    dri->core->destroyScreen(dri->screen);
 461
 462    return ret;
 463 }
 464
 465 static int
 466 dri_screen_create_swrast(struct gbm_dri_device *dri)
 467 {
 468    int ret;
 469
 470    dri->base.driver_name = strdup("swrast");
 471    if (dri->base.driver_name == NULL)
 472       return -1;
 473
 474    ret = dri_load_driver_swrast(dri);
 475    if (ret) {
 476       fprintf(stderr, "failed to load swrast driver\n");
 477       return ret;
 478    }
 479
 480    dri->extensions = gbm_dri_screen_extensions;
 481
 482    if (dri->swrast == NULL)
 483       return -1;
 484
 485    if (dri->swrast->base.version >= 4) {
 486       dri->screen = dri->swrast->createNewScreen2(0, dri->extensions,
 487                                                   dri->driver_extensions,
 488                                                   &dri->driver_configs, dri);
 489    } else {
 490       dri->screen = dri->swrast->createNewScreen(0, dri->extensions,
 491                                                  &dri->driver_configs, dri);
 492    }
 493    if (dri->screen == NULL)
 494       return -1;
 495
 496    dri->lookup_image = NULL;
 497    dri->lookup_user_data = NULL;
 498
 499    return 0;
 500 }
 501
 502 static int
 503 dri_screen_create(struct gbm_dri_device *dri)
 504 {
 505    char *driver_name;
 506
 507    driver_name = loader_get_driver_for_fd(dri->base.base.fd, 0);
 508    if (!driver_name)
 509       return -1;
 510
 511    return dri_screen_create_dri2(dri, driver_name);
 512 }
 513
 514 static int
 515 dri_screen_create_sw(struct gbm_dri_device *dri)
 516 {
 517    char *driver_name;
 518    int ret;
 519
 520    driver_name = strdup("kms_swrast");
 521    if (!driver_name)
 522       return -errno;
 523
 524    ret = dri_screen_create_dri2(dri, driver_name);
 525    if (ret == 0)
 526       return ret;
 527
 528    return dri_screen_create_swrast(dri);
 529 }
 530
 531 static int
 532 gbm_dri_is_format_supported(struct gbm_device *gbm,
 533                             uint32_t format,
 534                             uint32_t usage)
 535 {
 536    switch (format) {
 537    case GBM_BO_FORMAT_XRGB8888:
 538    case GBM_FORMAT_XRGB8888:
 539       break;
 540    case GBM_BO_FORMAT_ARGB8888:
 541    case GBM_FORMAT_ARGB8888:
 542       if (usage & GBM_BO_USE_SCANOUT)
 543          return 0;
 544       break;
 545    default:
 546       return 0;
 547    }
 548
 549    if (usage & GBM_BO_USE_CURSOR &&
 550        usage & GBM_BO_USE_RENDERING)
 551       return 0;
 552
 553    return 1;
 554 }
 555
 556 static int
 557 gbm_dri_bo_write(struct gbm_bo *_bo, const void *buf, size_t count)
 558 {
 559    struct gbm_dri_bo *bo = gbm_dri_bo(_bo);
 560
 561    if (bo->image != NULL) {
 562       errno = EINVAL;
 563       return -1;
 564    }
 565
 566    memcpy(bo->map, buf, count);
 567
 568    return 0;
 569 }
 570
 571 static int
 572 gbm_dri_bo_get_fd(struct gbm_bo *_bo)
 573 {
 574    struct gbm_dri_device *dri = gbm_dri_device(_bo->gbm);
 575    struct gbm_dri_bo *bo = gbm_dri_bo(_bo);
 576    int fd;
 577
 578    if (bo->image == NULL)
 579       return -1;
 580
 581    dri->image->queryImage(bo->image, __DRI_IMAGE_ATTRIB_FD, &fd);
 582
 583    return fd;
 584 }
 585
 586 static void
 587 gbm_dri_bo_destroy(struct gbm_bo *_bo)
 588 {
 589    struct gbm_dri_device *dri = gbm_dri_device(_bo->gbm);
 590    struct gbm_dri_bo *bo = gbm_dri_bo(_bo);
 591    struct drm_mode_destroy_dumb arg;
 592
 593    if (bo->image != NULL) {
 594       dri->image->destroyImage(bo->image);
 595    } else {
 596       gbm_dri_bo_unmap(bo);
 597       memset(&arg, 0, sizeof(arg));
 598       arg.handle = bo->handle;
 599       drmIoctl(dri->base.base.fd, DRM_IOCTL_MODE_DESTROY_DUMB, &arg);
 600    }
 601
 602    free(bo);
 603 }
 604
 605 static uint32_t
 606 gbm_dri_to_gbm_format(uint32_t dri_format)
 607 {
 608    uint32_t ret = 0;
 609
 610    switch (dri_format) {
 611    case __DRI_IMAGE_FORMAT_RGB565:
 612       ret = GBM_FORMAT_RGB565;
 613       break;
 614    case __DRI_IMAGE_FORMAT_XRGB8888:
 615       ret = GBM_FORMAT_XRGB8888;
 616       break;
 617    case __DRI_IMAGE_FORMAT_ARGB8888:
 618       ret = GBM_FORMAT_ARGB8888;
 619       break;
 620    case __DRI_IMAGE_FORMAT_ABGR8888:
 621       ret = GBM_FORMAT_ABGR8888;
 622       break;
 623    default:
 624       ret = 0;
 625       break;
 626    }
 627
 628    return ret;
 629 }
 630
 631 static struct gbm_bo *
 632 gbm_dri_bo_import(struct gbm_device *gbm,
 633                   uint32_t type, void *buffer, uint32_t usage)
 634 {
 635    struct gbm_dri_device *dri = gbm_dri_device(gbm);
 636    struct gbm_dri_bo *bo;
 637    __DRIimage *image;
 638    unsigned dri_use = 0;
 639    int gbm_format;
 640
 641    /* Required for query image WIDTH & HEIGHT */
 642    if (dri->image == NULL || dri->image->base.version < 4) {
 643       errno = ENOSYS;
 644       return NULL;
 645    }
 646
 647    switch (type) {
 648 #if HAVE_WAYLAND_PLATFORM
 649    case GBM_BO_IMPORT_WL_BUFFER:
 650    {
 651       struct wl_drm_buffer *wb;
 652
 653       if (!dri->wl_drm) {
 654          errno = EINVAL;
 655          return NULL;
 656       }
 657
 658       wb = wayland_drm_buffer_get(dri->wl_drm, (struct wl_resource *) buffer);
 659       if (!wb) {
 660          errno = EINVAL;
 661          return NULL;
 662       }
 663
 664       image = dri->image->dupImage(wb->driver_buffer, NULL);
 665
 666       switch (wb->format) {
 667       case WL_DRM_FORMAT_XRGB8888:
 668          gbm_format = GBM_FORMAT_XRGB8888;
 669          break;
 670       case WL_DRM_FORMAT_ARGB8888:
 671          gbm_format = GBM_FORMAT_ARGB8888;
 672          break;
 673       case WL_DRM_FORMAT_RGB565:
 674          gbm_format = GBM_FORMAT_RGB565;
 675          break;
 676       case WL_DRM_FORMAT_YUYV:
 677          gbm_format = GBM_FORMAT_YUYV;
 678          break;
 679       default:
 680          return NULL;
 681       }
 682       break;
 683    }
 684 #endif
 685
 686    case GBM_BO_IMPORT_EGL_IMAGE:
 687    {
 688       int dri_format;
 689       if (dri->lookup_image == NULL) {
 690          errno = EINVAL;
 691          return NULL;
 692       }
 693
 694       image = dri->lookup_image(dri->screen, buffer, dri->lookup_user_data);
 695       image = dri->image->dupImage(image, NULL);
 696       dri->image->queryImage(image, __DRI_IMAGE_ATTRIB_FORMAT, &dri_format);
 697       gbm_format = gbm_dri_to_gbm_format(dri_format);
 698       if (gbm_format == 0) {
 699          errno = EINVAL;
 700          return NULL;
 701       }
 702       break;
 703    }
 704
 705    case GBM_BO_IMPORT_FD:
 706    {
 707       struct gbm_import_fd_data *fd_data = buffer;
 708       int stride = fd_data->stride, offset = 0;
 709       int dri_format;
 710
 711       switch (fd_data->format) {
 712       case GBM_BO_FORMAT_XRGB8888:
 713          dri_format = GBM_FORMAT_XRGB8888;
 714          break;
 715       case GBM_BO_FORMAT_ARGB8888:
 716          dri_format = GBM_FORMAT_ARGB8888;
 717          break;
 718       default:
 719          dri_format = fd_data->format;
 720       }
 721
 722       image = dri->image->createImageFromFds(dri->screen,
 723                                              fd_data->width,
 724                                              fd_data->height,
 725                                              dri_format,
 726                                              &fd_data->fd, 1,
 727                                              &stride, &offset,
 728                                              NULL);
 729       if (image == NULL) {
 730          errno = EINVAL;
 731          return NULL;
 732       }
 733       gbm_format = fd_data->format;
 734       break;
 735    }
 736
 737    default:
 738       errno = ENOSYS;
 739       return NULL;
 740    }
 741
 742
 743    bo = calloc(1, sizeof *bo);
 744    if (bo == NULL)
 745       return NULL;
 746
 747    bo->image = image;
 748
 749    if (usage & GBM_BO_USE_SCANOUT)
 750       dri_use |= __DRI_IMAGE_USE_SCANOUT;
 751    if (usage & GBM_BO_USE_CURSOR)
 752       dri_use |= __DRI_IMAGE_USE_CURSOR;
 753    if (dri->image->base.version >= 2 &&
 754        !dri->image->validateUsage(bo->image, dri_use)) {
 755       errno = EINVAL;
 756       free(bo);
 757       return NULL;
 758    }
 759
 760    bo->base.base.gbm = gbm;
 761    bo->base.base.format = gbm_format;
 762
 763    dri->image->queryImage(bo->image, __DRI_IMAGE_ATTRIB_WIDTH,
 764                           (int*)&bo->base.base.width);
 765    dri->image->queryImage(bo->image, __DRI_IMAGE_ATTRIB_HEIGHT,
 766                           (int*)&bo->base.base.height);
 767    dri->image->queryImage(bo->image, __DRI_IMAGE_ATTRIB_STRIDE,
 768                           (int*)&bo->base.base.stride);
 769    dri->image->queryImage(bo->image, __DRI_IMAGE_ATTRIB_HANDLE,
 770                           &bo->base.base.handle.s32);
 771
 772    return &bo->base.base;
 773 }
 774
 775 static struct gbm_bo *
 776 create_dumb(struct gbm_device *gbm,
 777                   uint32_t width, uint32_t height,
 778                   uint32_t format, uint32_t usage)
 779 {
 780    struct gbm_dri_device *dri = gbm_dri_device(gbm);
 781    struct drm_mode_create_dumb create_arg;
 782    struct gbm_dri_bo *bo;
 783    struct drm_mode_destroy_dumb destroy_arg;
 784    int ret;
 785    int is_cursor, is_scanout;
 786
 787    is_cursor = (usage & GBM_BO_USE_CURSOR) != 0 &&
 788       format == GBM_FORMAT_ARGB8888;
 789    is_scanout = (usage & GBM_BO_USE_SCANOUT) != 0 &&
 790       format == GBM_FORMAT_XRGB8888;
 791    if (!is_cursor && !is_scanout) {
 792       errno = EINVAL;
 793       return NULL;
 794    }
 795
 796    bo = calloc(1, sizeof *bo);
 797    if (bo == NULL)
 798       return NULL;
 799
 800    memset(&create_arg, 0, sizeof(create_arg));
 801    create_arg.bpp = 32;
 802    create_arg.width = width;
 803    create_arg.height = height;
 804
 805    ret = drmIoctl(dri->base.base.fd, DRM_IOCTL_MODE_CREATE_DUMB, &create_arg);
 806    if (ret)
 807       goto free_bo;
 808
 809    bo->base.base.gbm = gbm;
 810    bo->base.base.width = width;
 811    bo->base.base.height = height;
 812    bo->base.base.stride = create_arg.pitch;
 813    bo->base.base.format = format;
 814    bo->base.base.handle.u32 = create_arg.handle;
 815    bo->handle = create_arg.handle;
 816    bo->size = create_arg.size;
 817
 818    if (gbm_dri_bo_map(bo) == NULL)
 819       goto destroy_dumb;
 820
 821    return &bo->base.base;
 822
 823 destroy_dumb:
 824    memset(&destroy_arg, 0, sizeof destroy_arg);
 825    destroy_arg.handle = create_arg.handle;
 826    drmIoctl(dri->base.base.fd, DRM_IOCTL_MODE_DESTROY_DUMB, &destroy_arg);
 827 free_bo:
 828    free(bo);
 829
 830    return NULL;
 831 }
 832
 833 static struct gbm_bo *
 834 gbm_dri_bo_create(struct gbm_device *gbm,
 835                   uint32_t width, uint32_t height,
 836                   uint32_t format, uint32_t usage)
 837 {
 838    struct gbm_dri_device *dri = gbm_dri_device(gbm);
 839    struct gbm_dri_bo *bo;
 840    int dri_format;
 841    unsigned dri_use = 0;
 842
 843    if (usage & GBM_BO_USE_WRITE || dri->image == NULL)
 844       return create_dumb(gbm, width, height, format, usage);
 845
 846    bo = calloc(1, sizeof *bo);
 847    if (bo == NULL)
 848       return NULL;
 849
 850    bo->base.base.gbm = gbm;
 851    bo->base.base.width = width;
 852    bo->base.base.height = height;
 853    bo->base.base.format = format;
 854
 855    switch (format) {
 856    case GBM_FORMAT_RGB565:
 857       dri_format =__DRI_IMAGE_FORMAT_RGB565;
 858       break;
 859    case GBM_FORMAT_XRGB8888:
 860    case GBM_BO_FORMAT_XRGB8888:
 861       dri_format = __DRI_IMAGE_FORMAT_XRGB8888;
 862       break;
 863    case GBM_FORMAT_ARGB8888:
 864    case GBM_BO_FORMAT_ARGB8888:
 865       dri_format = __DRI_IMAGE_FORMAT_ARGB8888;
 866       break;
 867    case GBM_FORMAT_ABGR8888:
 868       dri_format = __DRI_IMAGE_FORMAT_ABGR8888;
 869       break;
 870    case GBM_FORMAT_ARGB2101010:
 871       dri_format = __DRI_IMAGE_FORMAT_ARGB2101010;
 872       break;
 873    case GBM_FORMAT_XRGB2101010:
 874       dri_format = __DRI_IMAGE_FORMAT_XRGB2101010;
 875       break;
 876    default:
 877       errno = EINVAL;
 878       goto failed;
 879    }
 880
 881    if (usage & GBM_BO_USE_SCANOUT)
 882       dri_use |= __DRI_IMAGE_USE_SCANOUT;
 883    if (usage & GBM_BO_USE_CURSOR)
 884       dri_use |= __DRI_IMAGE_USE_CURSOR;
 885    if (usage & GBM_BO_USE_LINEAR)
 886       dri_use |= __DRI_IMAGE_USE_LINEAR;
 887
 888    /* Gallium drivers requires shared in order to get the handle/stride */
 889    dri_use |= __DRI_IMAGE_USE_SHARE;
 890
 891    bo->image =
 892       dri->image->createImage(dri->screen,
 893                               width, height,
 894                               dri_format, dri_use,
 895                               bo);
 896    if (bo->image == NULL)
 897       goto failed;
 898
 899    dri->image->queryImage(bo->image, __DRI_IMAGE_ATTRIB_HANDLE,
 900                           &bo->base.base.handle.s32);
 901    dri->image->queryImage(bo->image, __DRI_IMAGE_ATTRIB_STRIDE,
 902                           (int *) &bo->base.base.stride);
 903
 904    return &bo->base.base;
 905
 906 failed:
 907    free(bo);
 908    return NULL;
 909 }
 910
 911 static struct gbm_surface *
 912 gbm_dri_surface_create(struct gbm_device *gbm,
 913                        uint32_t width, uint32_t height,
 914                        uint32_t format, uint32_t flags)
 915 {
 916    struct gbm_dri_surface *surf;
 917
 918    surf = calloc(1, sizeof *surf);
 919    if (surf == NULL)
 920       return NULL;
 921
 922    surf->base.gbm = gbm;
 923    surf->base.width = width;
 924    surf->base.height = height;
 925    surf->base.format = format;
 926    surf->base.flags = flags;
 927
 928    return &surf->base;
 929 }
 930
 931 static void
 932 gbm_dri_surface_destroy(struct gbm_surface *_surf)
 933 {
 934    struct gbm_dri_surface *surf = gbm_dri_surface(_surf);
 935
 936    free(surf);
 937 }
 938
 939 static void
 940 dri_destroy(struct gbm_device *gbm)
 941 {
 942    struct gbm_dri_device *dri = gbm_dri_device(gbm);
 943    unsigned i;
 944
 945    dri->core->destroyScreen(dri->screen);
 946    for (i = 0; dri->driver_configs[i]; i++)
 947       free((__DRIconfig *) dri->driver_configs[i]);
 948    free(dri->driver_configs);
 949    dlclose(dri->driver);
 950    free(dri->base.driver_name);
 951
 952    free(dri);
 953 }
 954
 955 static struct gbm_device *
 956 dri_device_create(int fd)
 957 {
 958    struct gbm_dri_device *dri;
 959    int ret, force_sw;
 960
 961    dri = calloc(1, sizeof *dri);
 962    if (!dri)
 963       return NULL;
 964
 965    dri->base.base.fd = fd;
 966    dri->base.base.bo_create = gbm_dri_bo_create;
 967    dri->base.base.bo_import = gbm_dri_bo_import;
 968    dri->base.base.is_format_supported = gbm_dri_is_format_supported;
 969    dri->base.base.bo_write = gbm_dri_bo_write;
 970    dri->base.base.bo_get_fd = gbm_dri_bo_get_fd;
 971    dri->base.base.bo_destroy = gbm_dri_bo_destroy;
 972    dri->base.base.destroy = dri_destroy;
 973    dri->base.base.surface_create = gbm_dri_surface_create;
 974    dri->base.base.surface_destroy = gbm_dri_surface_destroy;
 975
 976    dri->base.type = GBM_DRM_DRIVER_TYPE_DRI;
 977    dri->base.base.name = "drm";
 978
 979    force_sw = getenv("GBM_ALWAYS_SOFTWARE") != NULL;
 980    if (!force_sw) {
 981       ret = dri_screen_create(dri);
 982       if (ret)
 983          ret = dri_screen_create_sw(dri);
 984    } else {
 985       ret = dri_screen_create_sw(dri);
 986    }
 987
 988    if (ret)
 989       goto err_dri;
 990
 991    return &dri->base.base;
 992
 993 err_dri:
 994    free(dri);
 995
 996    return NULL;
 997 }
 998
 999 struct gbm_backend gbm_dri_backend = {
1000    .backend_name = "dri",
1001    .create_device = dri_device_create,
1002 };