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 <stdbool.h>
  33 #include <string.h>
  34 #include <errno.h>
  35 #include <limits.h>
  36 #include <assert.h>
  37
  38 #include <sys/types.h>
  39 #include <unistd.h>
  40 #include <dlfcn.h>
  41 #include <xf86drm.h>
  42
  43 #include <GL/gl.h> /* dri_interface needs GL types */
  44 #include <GL/internal/dri_interface.h>
  45
  46 #include "gbm_driint.h"
  47
  48 #include "gbmint.h"
  49 #include "loader.h"
  50
  51 /* For importing wl_buffer */
  52 #if HAVE_WAYLAND_PLATFORM
  53 #include "../../../egl/wayland/wayland-drm/wayland-drm.h"
  54 #endif
  55
  56 static __DRIimage *
  57 dri_lookup_egl_image(__DRIscreen *screen, void *image, void *data)
  58 {
  59    struct gbm_dri_device *dri = data;
  60
  61    if (dri->lookup_image == NULL)
  62       return NULL;
  63
  64    return dri->lookup_image(screen, image, dri->lookup_user_data);
  65 }
  66
  67 static __DRIbuffer *
  68 dri_get_buffers(__DRIdrawable * driDrawable,
  69                  int *width, int *height,
  70                  unsigned int *attachments, int count,
  71                  int *out_count, void *data)
  72 {
  73    struct gbm_dri_surface *surf = data;
  74    struct gbm_dri_device *dri = gbm_dri_device(surf->base.gbm);
  75
  76    if (dri->get_buffers == NULL)
  77       return NULL;
  78
  79    return dri->get_buffers(driDrawable, width, height, attachments,
  80                            count, out_count, surf->dri_private);
  81 }
  82
  83 static void
  84 dri_flush_front_buffer(__DRIdrawable * driDrawable, void *data)
  85 {
  86    struct gbm_dri_surface *surf = data;
  87    struct gbm_dri_device *dri = gbm_dri_device(surf->base.gbm);
  88
  89    if (dri->flush_front_buffer != NULL)
  90       dri->flush_front_buffer(driDrawable, surf->dri_private);
  91 }
  92
  93 static __DRIbuffer *
  94 dri_get_buffers_with_format(__DRIdrawable * driDrawable,
  95                             int *width, int *height,
  96                             unsigned int *attachments, int count,
  97                             int *out_count, void *data)
  98 {
  99    struct gbm_dri_surface *surf = data;
 100    struct gbm_dri_device *dri = gbm_dri_device(surf->base.gbm);
 101
 102    if (dri->get_buffers_with_format == NULL)
 103       return NULL;
 104
 105    return
 106       dri->get_buffers_with_format(driDrawable, width, height, attachments,
 107                                    count, out_count, surf->dri_private);
 108 }
 109
 110 static int
 111 image_get_buffers(__DRIdrawable *driDrawable,
 112                   unsigned int format,
 113                   uint32_t *stamp,
 114                   void *loaderPrivate,
 115                   uint32_t buffer_mask,
 116                   struct __DRIimageList *buffers)
 117 {
 118    struct gbm_dri_surface *surf = loaderPrivate;
 119    struct gbm_dri_device *dri = gbm_dri_device(surf->base.gbm);
 120
 121    if (dri->image_get_buffers == NULL)
 122       return 0;
 123
 124    return dri->image_get_buffers(driDrawable, format, stamp,
 125                                  surf->dri_private, buffer_mask, buffers);
 126 }
 127
 128 static void
 129 swrast_get_drawable_info(__DRIdrawable *driDrawable,
 130                          int           *x,
 131                          int           *y,
 132                          int           *width,
 133                          int           *height,
 134                          void          *loaderPrivate)
 135 {
 136    struct gbm_dri_surface *surf = loaderPrivate;
 137
 138    *x = 0;
 139    *y = 0;
 140    *width = surf->base.width;
 141    *height = surf->base.height;
 142 }
 143
 144 static void
 145 swrast_put_image2(__DRIdrawable *driDrawable,
 146                   int            op,
 147                   int            x,
 148                   int            y,
 149                   int            width,
 150                   int            height,
 151                   int            stride,
 152                   char          *data,
 153                   void          *loaderPrivate)
 154 {
 155    struct gbm_dri_surface *surf = loaderPrivate;
 156    struct gbm_dri_device *dri = gbm_dri_device(surf->base.gbm);
 157
 158    dri->swrast_put_image2(driDrawable,
 159                           op, x, y,
 160                           width, height, stride,
 161                           data, surf->dri_private);
 162 }
 163
 164 static void
 165 swrast_put_image(__DRIdrawable *driDrawable,
 166                  int            op,
 167                  int            x,
 168                  int            y,
 169                  int            width,
 170                  int            height,
 171                  char          *data,
 172                  void          *loaderPrivate)
 173 {
 174    return swrast_put_image2(driDrawable, op, x, y, width, height,
 175                             width * 4, data, loaderPrivate);
 176 }
 177
 178 static void
 179 swrast_get_image(__DRIdrawable *driDrawable,
 180                  int            x,
 181                  int            y,
 182                  int            width,
 183                  int            height,
 184                  char          *data,
 185                  void          *loaderPrivate)
 186 {
 187    struct gbm_dri_surface *surf = loaderPrivate;
 188    struct gbm_dri_device *dri = gbm_dri_device(surf->base.gbm);
 189
 190    dri->swrast_get_image(driDrawable,
 191                          x, y,
 192                          width, height,
 193                          data, surf->dri_private);
 194 }
 195
 196 static const __DRIuseInvalidateExtension use_invalidate = {
 197    .base = { __DRI_USE_INVALIDATE, 1 }
 198 };
 199
 200 static const __DRIimageLookupExtension image_lookup_extension = {
 201    .base = { __DRI_IMAGE_LOOKUP, 1 },
 202
 203    .lookupEGLImage          = dri_lookup_egl_image
 204 };
 205
 206 static const __DRIdri2LoaderExtension dri2_loader_extension = {
 207    .base = { __DRI_DRI2_LOADER, 3 },
 208
 209    .getBuffers              = dri_get_buffers,
 210    .flushFrontBuffer        = dri_flush_front_buffer,
 211    .getBuffersWithFormat    = dri_get_buffers_with_format,
 212 };
 213
 214 static const __DRIimageLoaderExtension image_loader_extension = {
 215    .base = { __DRI_IMAGE_LOADER, 1 },
 216
 217    .getBuffers          = image_get_buffers,
 218    .flushFrontBuffer    = dri_flush_front_buffer,
 219 };
 220
 221 static const __DRIswrastLoaderExtension swrast_loader_extension = {
 222    .base = { __DRI_SWRAST_LOADER, 2 },
 223
 224    .getDrawableInfo = swrast_get_drawable_info,
 225    .putImage        = swrast_put_image,
 226    .getImage        = swrast_get_image,
 227    .putImage2       = swrast_put_image2
 228 };
 229
 230 static const __DRIextension *gbm_dri_screen_extensions[] = {
 231    &image_lookup_extension.base,
 232    &use_invalidate.base,
 233    &dri2_loader_extension.base,
 234    &image_loader_extension.base,
 235    &swrast_loader_extension.base,
 236    NULL,
 237 };
 238
 239 struct dri_extension_match {
 240    const char *name;
 241    int version;
 242    int offset;
 243    int optional;
 244 };
 245
 246 static struct dri_extension_match dri_core_extensions[] = {
 247    { __DRI2_FLUSH, 1, offsetof(struct gbm_dri_device, flush) },
 248    { __DRI_IMAGE, 1, offsetof(struct gbm_dri_device, image) },
 249    { __DRI2_FENCE, 1, offsetof(struct gbm_dri_device, fence), 1 },
 250    { __DRI2_INTEROP, 1, offsetof(struct gbm_dri_device, interop), 1 },
 251    { NULL, 0, 0 }
 252 };
 253
 254 static struct dri_extension_match gbm_dri_device_extensions[] = {
 255    { __DRI_CORE, 1, offsetof(struct gbm_dri_device, core) },
 256    { __DRI_DRI2, 1, offsetof(struct gbm_dri_device, dri2) },
 257    { NULL, 0, 0 }
 258 };
 259
 260 static struct dri_extension_match gbm_swrast_device_extensions[] = {
 261    { __DRI_CORE, 1, offsetof(struct gbm_dri_device, core), },
 262    { __DRI_SWRAST, 1, offsetof(struct gbm_dri_device, swrast) },
 263    { NULL, 0, 0 }
 264 };
 265
 266 static int
 267 dri_bind_extensions(struct gbm_dri_device *dri,
 268                     struct dri_extension_match *matches,
 269                     const __DRIextension **extensions)
 270 {
 271    int i, j, ret = 0;
 272    void *field;
 273
 274    for (i = 0; extensions[i]; i++) {
 275       for (j = 0; matches[j].name; j++) {
 276          if (strcmp(extensions[i]->name, matches[j].name) == 0 &&
 277              extensions[i]->version >= matches[j].version) {
 278             field = ((char *) dri + matches[j].offset);
 279             *(const __DRIextension **) field = extensions[i];
 280          }
 281       }
 282    }
 283
 284    for (j = 0; matches[j].name; j++) {
 285       field = ((char *) dri + matches[j].offset);
 286       if ((*(const __DRIextension **) field == NULL) && !matches[j].optional) {
 287          ret = -1;
 288       }
 289    }
 290
 291    return ret;
 292 }
 293
 294 static const __DRIextension **
 295 dri_open_driver(struct gbm_dri_device *dri)
 296 {
 297    const __DRIextension **extensions = NULL;
 298    char path[PATH_MAX], *search_paths, *p, *next, *end;
 299    char *get_extensions_name;
 300
 301    search_paths = NULL;
 302    /* don't allow setuid apps to use LIBGL_DRIVERS_PATH or GBM_DRIVERS_PATH */
 303    if (geteuid() == getuid()) {
 304       /* Read GBM_DRIVERS_PATH first for compatibility, but LIBGL_DRIVERS_PATH
 305        * is recommended over GBM_DRIVERS_PATH.
 306        */
 307       search_paths = getenv("GBM_DRIVERS_PATH");
 308
 309       /* Read LIBGL_DRIVERS_PATH if GBM_DRIVERS_PATH was not set.
 310        * LIBGL_DRIVERS_PATH is recommended over GBM_DRIVERS_PATH.
 311        */
 312       if (search_paths == NULL) {
 313          search_paths = getenv("LIBGL_DRIVERS_PATH");
 314       }
 315    }
 316    if (search_paths == NULL)
 317       search_paths = DEFAULT_DRIVER_DIR;
 318
 319    /* Temporarily work around dri driver libs that need symbols in libglapi
 320     * but don't automatically link it in.
 321     */
 322    /* XXX: Library name differs on per platforms basis. Update this as
 323     * osx/cygwin/windows/bsd gets support for GBM..
 324     */
 325    dlopen("libglapi.so.0", RTLD_LAZY | RTLD_GLOBAL);
 326
 327    dri->driver = NULL;
 328    end = search_paths + strlen(search_paths);
 329    for (p = search_paths; p < end && dri->driver == NULL; p = next + 1) {
 330       int len;
 331       next = strchr(p, ':');
 332       if (next == NULL)
 333          next = end;
 334
 335       len = next - p;
 336 #if GLX_USE_TLS
 337       snprintf(path, sizeof path,
 338                "%.*s/tls/%s_dri.so", len, p, dri->base.driver_name);
 339       dri->driver = dlopen(path, RTLD_NOW | RTLD_GLOBAL);
 340 #endif
 341       if (dri->driver == NULL) {
 342          snprintf(path, sizeof path,
 343                   "%.*s/%s_dri.so", len, p, dri->base.driver_name);
 344          dri->driver = dlopen(path, RTLD_NOW | RTLD_GLOBAL);
 345       }
 346       /* not need continue to loop all paths once the driver is found */
 347       if (dri->driver != NULL)
 348          break;
 349
 350 #ifdef ANDROID
 351       snprintf(path, sizeof path, "%.*s/gallium_dri.so", len, p);
 352       dri->driver = dlopen(path, RTLD_NOW | RTLD_GLOBAL);
 353       if (dri->driver == NULL)
 354          sprintf("failed to open %s: %s\n", path, dlerror());
 355       else
 356          break;
 357 #endif
 358    }
 359
 360    if (dri->driver == NULL) {
 361       fprintf(stderr, "gbm: failed to open any driver (search paths %s)\n",
 362               search_paths);
 363       fprintf(stderr, "gbm: Last dlopen error: %s\n", dlerror());
 364       return NULL;
 365    }
 366
 367    get_extensions_name = loader_get_extensions_name(dri->base.driver_name);
 368    if (get_extensions_name) {
 369       const __DRIextension **(*get_extensions)(void);
 370
 371       get_extensions = dlsym(dri->driver, get_extensions_name);
 372       free(get_extensions_name);
 373
 374       if (get_extensions)
 375          extensions = get_extensions();
 376    }
 377
 378    if (!extensions)
 379       extensions = dlsym(dri->driver, __DRI_DRIVER_EXTENSIONS);
 380    if (extensions == NULL) {
 381       fprintf(stderr, "gbm: driver exports no extensions (%s)", dlerror());
 382       dlclose(dri->driver);
 383    }
 384
 385    return extensions;
 386 }
 387
 388 static int
 389 dri_load_driver(struct gbm_dri_device *dri)
 390 {
 391    const __DRIextension **extensions;
 392
 393    extensions = dri_open_driver(dri);
 394    if (!extensions)
 395       return -1;
 396
 397    if (dri_bind_extensions(dri, gbm_dri_device_extensions, extensions) < 0) {
 398       dlclose(dri->driver);
 399       fprintf(stderr, "failed to bind extensions\n");
 400       return -1;
 401    }
 402
 403    dri->driver_extensions = extensions;
 404
 405    return 0;
 406 }
 407
 408 static int
 409 dri_load_driver_swrast(struct gbm_dri_device *dri)
 410 {
 411    const __DRIextension **extensions;
 412
 413    extensions = dri_open_driver(dri);
 414    if (!extensions)
 415       return -1;
 416
 417    if (dri_bind_extensions(dri, gbm_swrast_device_extensions, extensions) < 0) {
 418       dlclose(dri->driver);
 419       fprintf(stderr, "failed to bind extensions\n");
 420       return -1;
 421    }
 422
 423    dri->driver_extensions = extensions;
 424
 425    return 0;
 426 }
 427
 428 static int
 429 dri_screen_create_dri2(struct gbm_dri_device *dri, char *driver_name)
 430 {
 431    const __DRIextension **extensions;
 432    int ret = 0;
 433
 434    dri->base.driver_name = driver_name;
 435    if (dri->base.driver_name == NULL)
 436       return -1;
 437
 438    ret = dri_load_driver(dri);
 439    if (ret) {
 440       fprintf(stderr, "failed to load driver: %s\n", dri->base.driver_name);
 441       return ret;
 442    };
 443
 444    dri->loader_extensions = gbm_dri_screen_extensions;
 445
 446    if (dri->dri2 == NULL)
 447       return -1;
 448
 449    if (dri->dri2->base.version >= 4) {
 450       dri->screen = dri->dri2->createNewScreen2(0, dri->base.base.fd,
 451                                                 dri->loader_extensions,
 452                                                 dri->driver_extensions,
 453                                                 &dri->driver_configs, dri);
 454    } else {
 455       dri->screen = dri->dri2->createNewScreen(0, dri->base.base.fd,
 456                                                dri->loader_extensions,
 457                                                &dri->driver_configs, dri);
 458    }
 459    if (dri->screen == NULL)
 460       return -1;
 461
 462    extensions = dri->core->getExtensions(dri->screen);
 463    if (dri_bind_extensions(dri, dri_core_extensions, extensions) < 0) {
 464       ret = -1;
 465       goto free_screen;
 466    }
 467
 468    dri->lookup_image = NULL;
 469    dri->lookup_user_data = NULL;
 470
 471    return 0;
 472
 473 free_screen:
 474    dri->core->destroyScreen(dri->screen);
 475
 476    return ret;
 477 }
 478
 479 static int
 480 dri_screen_create_swrast(struct gbm_dri_device *dri)
 481 {
 482    int ret;
 483
 484    dri->base.driver_name = strdup("swrast");
 485    if (dri->base.driver_name == NULL)
 486       return -1;
 487
 488    ret = dri_load_driver_swrast(dri);
 489    if (ret) {
 490       fprintf(stderr, "failed to load swrast driver\n");
 491       return ret;
 492    }
 493
 494    dri->loader_extensions = gbm_dri_screen_extensions;
 495
 496    if (dri->swrast == NULL)
 497       return -1;
 498
 499    if (dri->swrast->base.version >= 4) {
 500       dri->screen = dri->swrast->createNewScreen2(0, dri->loader_extensions,
 501                                                   dri->driver_extensions,
 502                                                   &dri->driver_configs, dri);
 503    } else {
 504       dri->screen = dri->swrast->createNewScreen(0, dri->loader_extensions,
 505                                                  &dri->driver_configs, dri);
 506    }
 507    if (dri->screen == NULL)
 508       return -1;
 509
 510    dri->lookup_image = NULL;
 511    dri->lookup_user_data = NULL;
 512
 513    return 0;
 514 }
 515
 516 static int
 517 dri_screen_create(struct gbm_dri_device *dri)
 518 {
 519    char *driver_name;
 520
 521    driver_name = loader_get_driver_for_fd(dri->base.base.fd);
 522    if (!driver_name)
 523       return -1;
 524
 525    return dri_screen_create_dri2(dri, driver_name);
 526 }
 527
 528 static int
 529 dri_screen_create_sw(struct gbm_dri_device *dri)
 530 {
 531    char *driver_name;
 532    int ret;
 533
 534    driver_name = strdup("kms_swrast");
 535    if (!driver_name)
 536       return -errno;
 537
 538    ret = dri_screen_create_dri2(dri, driver_name);
 539    if (ret == 0)
 540       return ret;
 541
 542    return dri_screen_create_swrast(dri);
 543 }
 544
 545 static int
 546 gbm_dri_is_format_supported(struct gbm_device *gbm,
 547                             uint32_t format,
 548                             uint32_t usage)
 549 {
 550    switch (format) {
 551    case GBM_BO_FORMAT_XRGB8888:
 552    case GBM_FORMAT_XBGR8888:
 553    case GBM_FORMAT_XRGB8888:
 554       break;
 555    case GBM_BO_FORMAT_ARGB8888:
 556    case GBM_FORMAT_ARGB8888:
 557       if (usage & GBM_BO_USE_SCANOUT)
 558          return 0;
 559       break;
 560    default:
 561       return 0;
 562    }
 563
 564    if (usage & GBM_BO_USE_CURSOR &&
 565        usage & GBM_BO_USE_RENDERING)
 566       return 0;
 567
 568    return 1;
 569 }
 570
 571 static int
 572 gbm_dri_bo_write(struct gbm_bo *_bo, const void *buf, size_t count)
 573 {
 574    struct gbm_dri_bo *bo = gbm_dri_bo(_bo);
 575
 576    if (bo->image != NULL) {
 577       errno = EINVAL;
 578       return -1;
 579    }
 580
 581    memcpy(bo->map, buf, count);
 582
 583    return 0;
 584 }
 585
 586 static int
 587 gbm_dri_bo_get_fd(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    int fd;
 592
 593    if (bo->image == NULL)
 594       return -1;
 595
 596    if (!dri->image->queryImage(bo->image, __DRI_IMAGE_ATTRIB_FD, &fd))
 597       return -1;
 598
 599    return fd;
 600 }
 601
 602 static int
 603 get_number_planes(struct gbm_dri_device *dri, __DRIimage *image)
 604 {
 605    int num_planes = 0;
 606
 607    /* Dumb buffers are single-plane only. */
 608    if (!image)
 609       return 1;
 610
 611    dri->image->queryImage(image, __DRI_IMAGE_ATTRIB_NUM_PLANES, &num_planes);
 612
 613    if (num_planes <= 0)
 614       num_planes = 1;
 615
 616    return num_planes;
 617 }
 618
 619 static int
 620 gbm_dri_bo_get_planes(struct gbm_bo *_bo)
 621 {
 622    struct gbm_dri_device *dri = gbm_dri_device(_bo->gbm);
 623    struct gbm_dri_bo *bo = gbm_dri_bo(_bo);
 624
 625    return get_number_planes(dri, bo->image);
 626 }
 627
 628 static union gbm_bo_handle
 629 gbm_dri_bo_get_handle_for_plane(struct gbm_bo *_bo, int plane)
 630 {
 631    struct gbm_dri_device *dri = gbm_dri_device(_bo->gbm);
 632    struct gbm_dri_bo *bo = gbm_dri_bo(_bo);
 633    union gbm_bo_handle ret;
 634    ret.s32 = -1;
 635
 636    if (!dri->image || dri->image->base.version < 13 || !dri->image->fromPlanar) {
 637       errno = ENOSYS;
 638       return ret;
 639    }
 640
 641    if (plane >= get_number_planes(dri, bo->image)) {
 642       errno = EINVAL;
 643       return ret;
 644    }
 645
 646    /* dumb BOs can only utilize non-planar formats */
 647    if (!bo->image) {
 648       assert(plane == 0);
 649       ret.s32 = bo->handle;
 650       return ret;
 651    }
 652
 653    __DRIimage *image = dri->image->fromPlanar(bo->image, plane, NULL);
 654    if (image) {
 655       dri->image->queryImage(image, __DRI_IMAGE_ATTRIB_HANDLE, &ret.s32);
 656       dri->image->destroyImage(image);
 657    } else {
 658       assert(plane == 0);
 659       dri->image->queryImage(bo->image, __DRI_IMAGE_ATTRIB_HANDLE, &ret.s32);
 660    }
 661
 662    return ret;
 663 }
 664
 665 static void
 666 gbm_dri_bo_destroy(struct gbm_bo *_bo)
 667 {
 668    struct gbm_dri_device *dri = gbm_dri_device(_bo->gbm);
 669    struct gbm_dri_bo *bo = gbm_dri_bo(_bo);
 670    struct drm_mode_destroy_dumb arg;
 671
 672    if (bo->image != NULL) {
 673       dri->image->destroyImage(bo->image);
 674    } else {
 675       gbm_dri_bo_unmap_dumb(bo);
 676       memset(&arg, 0, sizeof(arg));
 677       arg.handle = bo->handle;
 678       drmIoctl(dri->base.base.fd, DRM_IOCTL_MODE_DESTROY_DUMB, &arg);
 679    }
 680
 681    free(bo);
 682 }
 683
 684 static uint32_t
 685 gbm_dri_to_gbm_format(uint32_t dri_format)
 686 {
 687    uint32_t ret = 0;
 688
 689    switch (dri_format) {
 690    case __DRI_IMAGE_FORMAT_RGB565:
 691       ret = GBM_FORMAT_RGB565;
 692       break;
 693    case __DRI_IMAGE_FORMAT_XRGB8888:
 694       ret = GBM_FORMAT_XRGB8888;
 695       break;
 696    case __DRI_IMAGE_FORMAT_ARGB8888:
 697       ret = GBM_FORMAT_ARGB8888;
 698       break;
 699    case __DRI_IMAGE_FORMAT_XBGR8888:
 700       ret = GBM_FORMAT_XBGR8888;
 701       break;
 702    case __DRI_IMAGE_FORMAT_ABGR8888:
 703       ret = GBM_FORMAT_ABGR8888;
 704       break;
 705    default:
 706       ret = 0;
 707       break;
 708    }
 709
 710    return ret;
 711 }
 712
 713 static struct gbm_bo *
 714 gbm_dri_bo_import(struct gbm_device *gbm,
 715                   uint32_t type, void *buffer, uint32_t usage)
 716 {
 717    struct gbm_dri_device *dri = gbm_dri_device(gbm);
 718    struct gbm_dri_bo *bo;
 719    __DRIimage *image;
 720    unsigned dri_use = 0;
 721    int gbm_format;
 722
 723    /* Required for query image WIDTH & HEIGHT */
 724    if (dri->image == NULL || dri->image->base.version < 4) {
 725       errno = ENOSYS;
 726       return NULL;
 727    }
 728
 729    switch (type) {
 730 #if HAVE_WAYLAND_PLATFORM
 731    case GBM_BO_IMPORT_WL_BUFFER:
 732    {
 733       struct wl_drm_buffer *wb;
 734
 735       if (!dri->wl_drm) {
 736          errno = EINVAL;
 737          return NULL;
 738       }
 739
 740       wb = wayland_drm_buffer_get(dri->wl_drm, (struct wl_resource *) buffer);
 741       if (!wb) {
 742          errno = EINVAL;
 743          return NULL;
 744       }
 745
 746       image = dri->image->dupImage(wb->driver_buffer, NULL);
 747
 748       switch (wb->format) {
 749       case WL_DRM_FORMAT_XRGB8888:
 750          gbm_format = GBM_FORMAT_XRGB8888;
 751          break;
 752       case WL_DRM_FORMAT_ARGB8888:
 753          gbm_format = GBM_FORMAT_ARGB8888;
 754          break;
 755       case WL_DRM_FORMAT_RGB565:
 756          gbm_format = GBM_FORMAT_RGB565;
 757          break;
 758       case WL_DRM_FORMAT_YUYV:
 759          gbm_format = GBM_FORMAT_YUYV;
 760          break;
 761       default:
 762          dri->image->destroyImage(image);
 763          return NULL;
 764       }
 765       break;
 766    }
 767 #endif
 768
 769    case GBM_BO_IMPORT_EGL_IMAGE:
 770    {
 771       int dri_format;
 772       if (dri->lookup_image == NULL) {
 773          errno = EINVAL;
 774          return NULL;
 775       }
 776
 777       image = dri->lookup_image(dri->screen, buffer, dri->lookup_user_data);
 778       image = dri->image->dupImage(image, NULL);
 779       dri->image->queryImage(image, __DRI_IMAGE_ATTRIB_FORMAT, &dri_format);
 780       gbm_format = gbm_dri_to_gbm_format(dri_format);
 781       if (gbm_format == 0) {
 782          errno = EINVAL;
 783          dri->image->destroyImage(image);
 784          return NULL;
 785       }
 786       break;
 787    }
 788
 789    case GBM_BO_IMPORT_FD:
 790    {
 791       struct gbm_import_fd_data *fd_data = buffer;
 792       int stride = fd_data->stride, offset = 0;
 793       int dri_format;
 794
 795       switch (fd_data->format) {
 796       case GBM_BO_FORMAT_XRGB8888:
 797          dri_format = GBM_FORMAT_XRGB8888;
 798          break;
 799       case GBM_BO_FORMAT_ARGB8888:
 800          dri_format = GBM_FORMAT_ARGB8888;
 801          break;
 802       default:
 803          dri_format = fd_data->format;
 804       }
 805
 806       image = dri->image->createImageFromFds(dri->screen,
 807                                              fd_data->width,
 808                                              fd_data->height,
 809                                              dri_format,
 810                                              &fd_data->fd, 1,
 811                                              &stride, &offset,
 812                                              NULL);
 813       if (image == NULL) {
 814          errno = EINVAL;
 815          return NULL;
 816       }
 817       gbm_format = fd_data->format;
 818       break;
 819    }
 820
 821    default:
 822       errno = ENOSYS;
 823       return NULL;
 824    }
 825
 826
 827    bo = calloc(1, sizeof *bo);
 828    if (bo == NULL) {
 829       dri->image->destroyImage(image);
 830       return NULL;
 831    }
 832
 833    bo->image = image;
 834
 835    if (usage & GBM_BO_USE_SCANOUT)
 836       dri_use |= __DRI_IMAGE_USE_SCANOUT;
 837    if (usage & GBM_BO_USE_CURSOR)
 838       dri_use |= __DRI_IMAGE_USE_CURSOR;
 839    if (dri->image->base.version >= 2 &&
 840        !dri->image->validateUsage(bo->image, dri_use)) {
 841       errno = EINVAL;
 842       dri->image->destroyImage(bo->image);
 843       free(bo);
 844       return NULL;
 845    }
 846
 847    bo->base.base.gbm = gbm;
 848    bo->base.base.format = gbm_format;
 849
 850    dri->image->queryImage(bo->image, __DRI_IMAGE_ATTRIB_WIDTH,
 851                           (int*)&bo->base.base.width);
 852    dri->image->queryImage(bo->image, __DRI_IMAGE_ATTRIB_HEIGHT,
 853                           (int*)&bo->base.base.height);
 854    dri->image->queryImage(bo->image, __DRI_IMAGE_ATTRIB_STRIDE,
 855                           (int*)&bo->base.base.stride);
 856    dri->image->queryImage(bo->image, __DRI_IMAGE_ATTRIB_HANDLE,
 857                           &bo->base.base.handle.s32);
 858
 859    return &bo->base.base;
 860 }
 861
 862 static bool
 863 is_planar_format(uint32_t format)
 864 {
 865    switch (format) {
 866    case GBM_FORMAT_NV12:
 867    case GBM_FORMAT_NV21:
 868    case GBM_FORMAT_NV16:
 869    case GBM_FORMAT_NV61:
 870    case GBM_FORMAT_YUV410:
 871    case GBM_FORMAT_YVU410:
 872    case GBM_FORMAT_YUV411:
 873    case GBM_FORMAT_YVU411:
 874    case GBM_FORMAT_YUV420:
 875    case GBM_FORMAT_YVU420:
 876    case GBM_FORMAT_YUV422:
 877    case GBM_FORMAT_YVU422:
 878    case GBM_FORMAT_YUV444:
 879    case GBM_FORMAT_YVU444:
 880       return true;
 881    default:
 882       return false;
 883    }
 884
 885 }
 886
 887 static struct gbm_bo *
 888 create_dumb(struct gbm_device *gbm,
 889                   uint32_t width, uint32_t height,
 890                   uint32_t format, uint32_t usage)
 891 {
 892    struct gbm_dri_device *dri = gbm_dri_device(gbm);
 893    struct drm_mode_create_dumb create_arg;
 894    struct gbm_dri_bo *bo;
 895    struct drm_mode_destroy_dumb destroy_arg;
 896    int ret;
 897    int is_cursor, is_scanout;
 898
 899    is_cursor = (usage & GBM_BO_USE_CURSOR) != 0 &&
 900       format == GBM_FORMAT_ARGB8888;
 901    is_scanout = (usage & GBM_BO_USE_SCANOUT) != 0 &&
 902       format == GBM_FORMAT_XRGB8888;
 903    if (!is_cursor && !is_scanout) {
 904       errno = EINVAL;
 905       return NULL;
 906    }
 907
 908    if (is_planar_format(format)) {
 909       errno = EINVAL;
 910       return NULL;
 911    }
 912
 913    bo = calloc(1, sizeof *bo);
 914    if (bo == NULL)
 915       return NULL;
 916
 917    memset(&create_arg, 0, sizeof(create_arg));
 918    create_arg.bpp = 32;
 919    create_arg.width = width;
 920    create_arg.height = height;
 921
 922    ret = drmIoctl(dri->base.base.fd, DRM_IOCTL_MODE_CREATE_DUMB, &create_arg);
 923    if (ret)
 924       goto free_bo;
 925
 926    bo->base.base.gbm = gbm;
 927    bo->base.base.width = width;
 928    bo->base.base.height = height;
 929    bo->base.base.stride = create_arg.pitch;
 930    bo->base.base.format = format;
 931    bo->base.base.handle.u32 = create_arg.handle;
 932    bo->handle = create_arg.handle;
 933    bo->size = create_arg.size;
 934
 935    if (gbm_dri_bo_map_dumb(bo) == NULL)
 936       goto destroy_dumb;
 937
 938    return &bo->base.base;
 939
 940 destroy_dumb:
 941    memset(&destroy_arg, 0, sizeof destroy_arg);
 942    destroy_arg.handle = create_arg.handle;
 943    drmIoctl(dri->base.base.fd, DRM_IOCTL_MODE_DESTROY_DUMB, &destroy_arg);
 944 free_bo:
 945    free(bo);
 946
 947    return NULL;
 948 }
 949
 950 static struct gbm_bo *
 951 gbm_dri_bo_create(struct gbm_device *gbm,
 952                   uint32_t width, uint32_t height,
 953                   uint32_t format, uint32_t usage)
 954 {
 955    struct gbm_dri_device *dri = gbm_dri_device(gbm);
 956    struct gbm_dri_bo *bo;
 957    int dri_format;
 958    unsigned dri_use = 0;
 959
 960    if (usage & GBM_BO_USE_WRITE || dri->image == NULL)
 961       return create_dumb(gbm, width, height, format, usage);
 962
 963    bo = calloc(1, sizeof *bo);
 964    if (bo == NULL)
 965       return NULL;
 966
 967    bo->base.base.gbm = gbm;
 968    bo->base.base.width = width;
 969    bo->base.base.height = height;
 970    bo->base.base.format = format;
 971
 972    switch (format) {
 973    case GBM_FORMAT_R8:
 974       dri_format = __DRI_IMAGE_FORMAT_R8;
 975       break;
 976    case GBM_FORMAT_GR88:
 977       dri_format = __DRI_IMAGE_FORMAT_GR88;
 978       break;
 979    case GBM_FORMAT_RGB565:
 980       dri_format = __DRI_IMAGE_FORMAT_RGB565;
 981       break;
 982    case GBM_FORMAT_XRGB8888:
 983    case GBM_BO_FORMAT_XRGB8888:
 984       dri_format = __DRI_IMAGE_FORMAT_XRGB8888;
 985       break;
 986    case GBM_FORMAT_ARGB8888:
 987    case GBM_BO_FORMAT_ARGB8888:
 988       dri_format = __DRI_IMAGE_FORMAT_ARGB8888;
 989       break;
 990    case GBM_FORMAT_ABGR8888:
 991       dri_format = __DRI_IMAGE_FORMAT_ABGR8888;
 992       break;
 993    case GBM_FORMAT_XBGR8888:
 994       dri_format = __DRI_IMAGE_FORMAT_XBGR8888;
 995       break;
 996    case GBM_FORMAT_ARGB2101010:
 997       dri_format = __DRI_IMAGE_FORMAT_ARGB2101010;
 998       break;
 999    case GBM_FORMAT_XRGB2101010:
1000       dri_format = __DRI_IMAGE_FORMAT_XRGB2101010;
1001       break;
1002    default:
1003       errno = EINVAL;
1004       goto failed;
1005    }
1006
1007    if (usage & GBM_BO_USE_SCANOUT)
1008       dri_use |= __DRI_IMAGE_USE_SCANOUT;
1009    if (usage & GBM_BO_USE_CURSOR)
1010       dri_use |= __DRI_IMAGE_USE_CURSOR;
1011    if (usage & GBM_BO_USE_LINEAR)
1012       dri_use |= __DRI_IMAGE_USE_LINEAR;
1013
1014    /* Gallium drivers requires shared in order to get the handle/stride */
1015    dri_use |= __DRI_IMAGE_USE_SHARE;
1016
1017    bo->image =
1018       dri->image->createImage(dri->screen,
1019                               width, height,
1020                               dri_format, dri_use,
1021                               bo);
1022    if (bo->image == NULL)
1023       goto failed;
1024
1025    dri->image->queryImage(bo->image, __DRI_IMAGE_ATTRIB_HANDLE,
1026                           &bo->base.base.handle.s32);
1027    dri->image->queryImage(bo->image, __DRI_IMAGE_ATTRIB_STRIDE,
1028                           (int *) &bo->base.base.stride);
1029
1030    return &bo->base.base;
1031
1032 failed:
1033    free(bo);
1034    return NULL;
1035 }
1036
1037 static void *
1038 gbm_dri_bo_map(struct gbm_bo *_bo,
1039               uint32_t x, uint32_t y,
1040               uint32_t width, uint32_t height,
1041               uint32_t flags, uint32_t *stride, void **map_data)
1042 {
1043    struct gbm_dri_device *dri = gbm_dri_device(_bo->gbm);
1044    struct gbm_dri_bo *bo = gbm_dri_bo(_bo);
1045
1046    /* If it's a dumb buffer, we already have a mapping */
1047    if (bo->map) {
1048       *map_data = (char *)bo->map + (bo->base.base.stride * y) + (x * 4);
1049       *stride = bo->base.base.stride;
1050       return *map_data;
1051    }
1052
1053    if (!dri->image || dri->image->base.version < 12 || !dri->image->mapImage) {
1054       errno = ENOSYS;
1055       return NULL;
1056    }
1057
1058    mtx_lock(&dri->mutex);
1059    if (!dri->context)
1060       dri->context = dri->dri2->createNewContext(dri->screen, NULL,
1061                                                  NULL, NULL);
1062    assert(dri->context);
1063    mtx_unlock(&dri->mutex);
1064
1065    /* GBM flags and DRI flags are the same, so just pass them on */
1066    return dri->image->mapImage(dri->context, bo->image, x, y,
1067                                width, height, flags, (int *)stride,
1068                                map_data);
1069 }
1070
1071 static void
1072 gbm_dri_bo_unmap(struct gbm_bo *_bo, void *map_data)
1073 {
1074    struct gbm_dri_device *dri = gbm_dri_device(_bo->gbm);
1075    struct gbm_dri_bo *bo = gbm_dri_bo(_bo);
1076
1077    /* Check if it's a dumb buffer and check the pointer is in range */
1078    if (bo->map) {
1079       assert(map_data >= bo->map);
1080       assert(map_data < (bo->map + bo->size));
1081       return;
1082    }
1083
1084    if (!dri->context || !dri->image ||
1085        dri->image->base.version < 12 || !dri->image->unmapImage)
1086       return;
1087
1088    dri->image->unmapImage(dri->context, bo->image, map_data);
1089 }
1090
1091
1092 static struct gbm_surface *
1093 gbm_dri_surface_create(struct gbm_device *gbm,
1094                        uint32_t width, uint32_t height,
1095                        uint32_t format, uint32_t flags)
1096 {
1097    struct gbm_dri_surface *surf;
1098
1099    surf = calloc(1, sizeof *surf);
1100    if (surf == NULL)
1101       return NULL;
1102
1103    surf->base.gbm = gbm;
1104    surf->base.width = width;
1105    surf->base.height = height;
1106    surf->base.format = format;
1107    surf->base.flags = flags;
1108
1109    return &surf->base;
1110 }
1111
1112 static void
1113 gbm_dri_surface_destroy(struct gbm_surface *_surf)
1114 {
1115    struct gbm_dri_surface *surf = gbm_dri_surface(_surf);
1116
1117    free(surf);
1118 }
1119
1120 static void
1121 dri_destroy(struct gbm_device *gbm)
1122 {
1123    struct gbm_dri_device *dri = gbm_dri_device(gbm);
1124    unsigned i;
1125
1126    if (dri->context)
1127       dri->core->destroyContext(dri->context);
1128
1129    dri->core->destroyScreen(dri->screen);
1130    for (i = 0; dri->driver_configs[i]; i++)
1131       free((__DRIconfig *) dri->driver_configs[i]);
1132    free(dri->driver_configs);
1133    dlclose(dri->driver);
1134    free(dri->base.driver_name);
1135
1136    free(dri);
1137 }
1138
1139 static struct gbm_device *
1140 dri_device_create(int fd)
1141 {
1142    struct gbm_dri_device *dri;
1143    int ret, force_sw;
1144
1145    dri = calloc(1, sizeof *dri);
1146    if (!dri)
1147       return NULL;
1148
1149    dri->base.base.fd = fd;
1150    dri->base.base.bo_create = gbm_dri_bo_create;
1151    dri->base.base.bo_import = gbm_dri_bo_import;
1152    dri->base.base.bo_map = gbm_dri_bo_map;
1153    dri->base.base.bo_unmap = gbm_dri_bo_unmap;
1154    dri->base.base.is_format_supported = gbm_dri_is_format_supported;
1155    dri->base.base.bo_write = gbm_dri_bo_write;
1156    dri->base.base.bo_get_fd = gbm_dri_bo_get_fd;
1157    dri->base.base.bo_get_planes = gbm_dri_bo_get_planes;
1158    dri->base.base.bo_get_handle = gbm_dri_bo_get_handle_for_plane;
1159    dri->base.base.bo_destroy = gbm_dri_bo_destroy;
1160    dri->base.base.destroy = dri_destroy;
1161    dri->base.base.surface_create = gbm_dri_surface_create;
1162    dri->base.base.surface_destroy = gbm_dri_surface_destroy;
1163
1164    dri->base.type = GBM_DRM_DRIVER_TYPE_DRI;
1165    dri->base.base.name = "drm";
1166
1167    mtx_init(&dri->mutex, mtx_plain);
1168
1169    force_sw = getenv("GBM_ALWAYS_SOFTWARE") != NULL;
1170    if (!force_sw) {
1171       ret = dri_screen_create(dri);
1172       if (ret)
1173          ret = dri_screen_create_sw(dri);
1174    } else {
1175       ret = dri_screen_create_sw(dri);
1176    }
1177
1178    if (ret)
1179       goto err_dri;
1180
1181    return &dri->base.base;
1182
1183 err_dri:
1184    free(dri);
1185
1186    return NULL;
1187 }
1188
1189 struct gbm_backend gbm_dri_backend = {
1190    .backend_name = "dri",
1191    .create_device = dri_device_create,
1192 };