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