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 <limits.h>
  34
  35 #include <sys/types.h>
  36 #include <unistd.h>
  37 #include <dlfcn.h>
  38
  39 #include <GL/gl.h> /* dri_interface needs GL types */
  40 #include <GL/internal/dri_interface.h>
  41
  42 #include "gbm_driint.h"
  43
  44 #include "gbmint.h"
  45
  46 /* For importing wl_buffer */
  47 #if HAVE_WAYLAND_PLATFORM
  48 #include "../../../egl/wayland/wayland-drm/wayland-drm.h"
  49 #endif
  50
  51 static __DRIimage *
  52 dri_lookup_egl_image(__DRIscreen *screen, void *image, void *data)
  53 {
  54    struct gbm_dri_device *dri = data;
  55
  56    if (dri->lookup_image == NULL)
  57       return NULL;
  58
  59    return dri->lookup_image(screen, image, dri->lookup_user_data);
  60 }
  61
  62 static __DRIbuffer *
  63 dri_get_buffers(__DRIdrawable * driDrawable,
  64                  int *width, int *height,
  65                  unsigned int *attachments, int count,
  66                  int *out_count, void *data)
  67 {
  68    struct gbm_dri_surface *surf = data;
  69    struct gbm_dri_device *dri = gbm_dri_device(surf->base.gbm);
  70
  71    if (dri->get_buffers == NULL)
  72       return NULL;
  73
  74    return dri->get_buffers(driDrawable, width, height, attachments,
  75                            count, out_count, surf->dri_private);
  76 }
  77
  78 static void
  79 dri_flush_front_buffer(__DRIdrawable * driDrawable, void *data)
  80 {
  81    struct gbm_dri_surface *surf = data;
  82    struct gbm_dri_device *dri = gbm_dri_device(surf->base.gbm);
  83
  84    if (dri->flush_front_buffer != NULL)
  85       dri->flush_front_buffer(driDrawable, surf->dri_private);
  86 }
  87
  88 static __DRIbuffer *
  89 dri_get_buffers_with_format(__DRIdrawable * driDrawable,
  90                             int *width, int *height,
  91                             unsigned int *attachments, int count,
  92                             int *out_count, void *data)
  93 {
  94    struct gbm_dri_surface *surf = data;
  95    struct gbm_dri_device *dri = gbm_dri_device(surf->base.gbm);
  96
  97    if (dri->get_buffers_with_format == NULL)
  98       return NULL;
  99
 100    return
 101       dri->get_buffers_with_format(driDrawable, width, height, attachments,
 102                                    count, out_count, surf->dri_private);
 103 }
 104
 105 static const __DRIuseInvalidateExtension use_invalidate = {
 106    { __DRI_USE_INVALIDATE, 1 }
 107 };
 108
 109 static const __DRIimageLookupExtension image_lookup_extension = {
 110    { __DRI_IMAGE_LOOKUP, 1 },
 111    dri_lookup_egl_image
 112 };
 113
 114 const __DRIdri2LoaderExtension dri2_loader_extension = {
 115    { __DRI_DRI2_LOADER, 3 },
 116    dri_get_buffers,
 117    dri_flush_front_buffer,
 118    dri_get_buffers_with_format,
 119 };
 120
 121 struct dri_extension_match {
 122    const char *name;
 123    int version;
 124    int offset;
 125 };
 126
 127 static struct dri_extension_match dri_core_extensions[] = {
 128    { __DRI2_FLUSH, 1, offsetof(struct gbm_dri_device, flush) },
 129    { __DRI_IMAGE, 1, offsetof(struct gbm_dri_device, image) },
 130    { NULL, 0, 0 }
 131 };
 132
 133 static struct dri_extension_match gbm_dri_device_extensions[] = {
 134    { __DRI_CORE, 1, offsetof(struct gbm_dri_device, core) },
 135    { __DRI_DRI2, 1, offsetof(struct gbm_dri_device, dri2) },
 136    { NULL, 0, 0 }
 137 };
 138
 139 static int
 140 dri_bind_extensions(struct gbm_dri_device *dri,
 141                     struct dri_extension_match *matches,
 142                     const __DRIextension **extensions)
 143 {
 144    int i, j, ret = 0;
 145    void *field;
 146
 147    for (i = 0; extensions[i]; i++) {
 148       for (j = 0; matches[j].name; j++) {
 149          if (strcmp(extensions[i]->name, matches[j].name) == 0 &&
 150              extensions[i]->version >= matches[j].version) {
 151             field = ((char *) dri + matches[j].offset);
 152             *(const __DRIextension **) field = extensions[i];
 153          }
 154       }
 155    }
 156
 157    for (j = 0; matches[j].name; j++) {
 158       field = ((char *) dri + matches[j].offset);
 159       if (*(const __DRIextension **) field == NULL) {
 160          ret = -1;
 161       }
 162    }
 163
 164    return ret;
 165 }
 166
 167 static int
 168 dri_load_driver(struct gbm_dri_device *dri)
 169 {
 170    const __DRIextension **extensions;
 171    char path[PATH_MAX], *search_paths, *p, *next, *end;
 172
 173    search_paths = NULL;
 174    if (geteuid() == getuid()) {
 175       /* don't allow setuid apps to use GBM_DRIVERS_PATH */
 176       search_paths = getenv("GBM_DRIVERS_PATH");
 177    }
 178    if (search_paths == NULL)
 179       search_paths = DEFAULT_DRIVER_DIR;
 180
 181    dri->driver = NULL;
 182    end = search_paths + strlen(search_paths);
 183    for (p = search_paths; p < end && dri->driver == NULL; p = next + 1) {
 184       int len;
 185       next = strchr(p, ':');
 186       if (next == NULL)
 187          next = end;
 188
 189       len = next - p;
 190 #if GLX_USE_TLS
 191       snprintf(path, sizeof path,
 192                "%.*s/tls/%s_dri.so", len, p, dri->base.driver_name);
 193       dri->driver = dlopen(path, RTLD_NOW | RTLD_GLOBAL);
 194 #endif
 195       if (dri->driver == NULL) {
 196          snprintf(path, sizeof path,
 197                   "%.*s/%s_dri.so", len, p, dri->base.driver_name);
 198          dri->driver = dlopen(path, RTLD_NOW | RTLD_GLOBAL);
 199          if (dri->driver == NULL)
 200             fprintf(stderr, "failed to open %s: %s\n", path, dlerror());
 201       }
 202    }
 203
 204    if (dri->driver == NULL) {
 205       fprintf(stderr, "gbm: failed to open any driver (search paths %s)",
 206               search_paths);
 207       return -1;
 208    }
 209
 210    extensions = dlsym(dri->driver, __DRI_DRIVER_EXTENSIONS);
 211    if (extensions == NULL) {
 212       fprintf(stderr, "gbm: driver exports no extensions (%s)", dlerror());
 213       dlclose(dri->driver);
 214       return -1;
 215    }
 216
 217
 218    if (dri_bind_extensions(dri, gbm_dri_device_extensions, extensions) < 0) {
 219       dlclose(dri->driver);
 220       fprintf(stderr, "failed to bind extensions\n");
 221       return -1;
 222    }
 223
 224    return 0;
 225 }
 226
 227 static int
 228 dri_screen_create(struct gbm_dri_device *dri)
 229 {
 230    const __DRIextension **extensions;
 231    int ret = 0;
 232
 233    dri->base.driver_name = dri_fd_get_driver_name(dri->base.base.fd);
 234    if (dri->base.driver_name == NULL)
 235       return -1;
 236
 237    ret = dri_load_driver(dri);
 238    if (ret) {
 239       fprintf(stderr, "failed to load driver: %s\n", dri->base.driver_name);
 240       return ret;
 241    };
 242
 243    dri->extensions[0] = &image_lookup_extension.base;
 244    dri->extensions[1] = &use_invalidate.base;
 245    dri->extensions[2] = &dri2_loader_extension.base;
 246    dri->extensions[3] = NULL;
 247
 248    if (dri->dri2 == NULL)
 249       return -1;
 250
 251    dri->screen = dri->dri2->createNewScreen(0, dri->base.base.fd,
 252                                             dri->extensions,
 253                                             &dri->driver_configs, dri);
 254    if (dri->screen == NULL)
 255       return -1;
 256
 257    extensions = dri->core->getExtensions(dri->screen);
 258    if (dri_bind_extensions(dri, dri_core_extensions, extensions) < 0) {
 259       ret = -1;
 260       goto free_screen;
 261    }
 262
 263    dri->lookup_image = NULL;
 264    dri->lookup_user_data = NULL;
 265
 266    return 0;
 267
 268 free_screen:
 269    dri->core->destroyScreen(dri->screen);
 270
 271    return ret;
 272 }
 273
 274 static int
 275 gbm_dri_is_format_supported(struct gbm_device *gbm,
 276                             uint32_t format,
 277                             uint32_t usage)
 278 {
 279    switch (format) {
 280    case GBM_BO_FORMAT_XRGB8888:
 281    case GBM_FORMAT_XRGB8888:
 282       break;
 283    case GBM_BO_FORMAT_ARGB8888:
 284    case GBM_FORMAT_ARGB8888:
 285       if (usage & GBM_BO_USE_SCANOUT)
 286          return 0;
 287       break;
 288    default:
 289       return 0;
 290    }
 291
 292    if (usage & GBM_BO_USE_CURSOR_64X64 &&
 293        usage & GBM_BO_USE_RENDERING)
 294       return 0;
 295
 296    return 1;
 297 }
 298
 299 static int
 300 gbm_dri_bo_write(struct gbm_bo *_bo, const void *buf, size_t count)
 301 {
 302    struct gbm_dri_bo *bo = gbm_dri_bo(_bo);
 303    void *ptr;
 304    int ret;
 305
 306    if (bo->bo == NULL)
 307       return -1;
 308
 309    ret = kms_bo_map(bo->bo, &ptr);
 310    if (ret < 0)
 311       return -1;
 312
 313    memcpy(ptr, buf, count);
 314
 315    kms_bo_unmap(bo->bo);
 316    return 0;
 317 }
 318
 319 static void
 320 gbm_dri_bo_destroy(struct gbm_bo *_bo)
 321 {
 322    struct gbm_dri_device *dri = gbm_dri_device(_bo->gbm);
 323    struct gbm_dri_bo *bo = gbm_dri_bo(_bo);
 324
 325    if (bo->image != NULL)
 326       dri->image->destroyImage(bo->image);
 327    if (bo->bo != NULL)
 328       kms_bo_destroy(&bo->bo);
 329    free(bo);
 330 }
 331
 332 static uint32_t
 333 gbm_dri_to_gbm_format(uint32_t dri_format)
 334 {
 335    uint32_t ret = 0;
 336
 337    switch (dri_format) {
 338    case __DRI_IMAGE_FORMAT_RGB565:
 339       ret = GBM_FORMAT_RGB565;
 340       break;
 341    case __DRI_IMAGE_FORMAT_XRGB8888:
 342       ret = GBM_FORMAT_XRGB8888;
 343       break;
 344    case __DRI_IMAGE_FORMAT_ARGB8888:
 345       ret = GBM_FORMAT_ARGB8888;
 346       break;
 347    case __DRI_IMAGE_FORMAT_ABGR8888:
 348       ret = GBM_FORMAT_ABGR8888;
 349       break;
 350    default:
 351       ret = 0;
 352       break;
 353    }
 354
 355    return ret;
 356 }
 357
 358 static struct gbm_bo *
 359 gbm_dri_bo_import(struct gbm_device *gbm,
 360                   uint32_t type, void *buffer, uint32_t usage)
 361 {
 362    struct gbm_dri_device *dri = gbm_dri_device(gbm);
 363    struct gbm_dri_bo *bo;
 364    __DRIimage *image;
 365    unsigned dri_use = 0;
 366    int gbm_format;
 367
 368    /* Required for query image WIDTH & HEIGHT */
 369    if (dri->image->base.version < 4)
 370       return NULL;
 371
 372    switch (type) {
 373 #if HAVE_WAYLAND_PLATFORM
 374    case GBM_BO_IMPORT_WL_BUFFER:
 375    {
 376       struct wl_drm_buffer *wb = (struct wl_drm_buffer *) buffer;
 377
 378       if (!wayland_buffer_is_drm(buffer))
 379          return NULL;
 380
 381       image = wb->driver_buffer;
 382
 383       switch (wb->format) {
 384       case WL_DRM_FORMAT_XRGB8888:
 385          gbm_format = GBM_FORMAT_XRGB8888;
 386          break;
 387       case WL_DRM_FORMAT_ARGB8888:
 388          gbm_format = GBM_FORMAT_ARGB8888;
 389          break;
 390       case WL_DRM_FORMAT_YUYV:
 391          gbm_format = GBM_FORMAT_YUYV;
 392          break;
 393       default:
 394          return NULL;
 395       }
 396       break;
 397    }
 398 #endif
 399
 400    case GBM_BO_IMPORT_EGL_IMAGE:
 401    {
 402       int dri_format;
 403       if (dri->lookup_image == NULL)
 404          return NULL;
 405
 406       image = dri->lookup_image(dri->screen, buffer, dri->lookup_user_data);
 407       dri->image->queryImage(image, __DRI_IMAGE_ATTRIB_FORMAT, &dri_format);
 408       gbm_format = gbm_dri_to_gbm_format(dri_format);
 409       if (gbm_format == 0)
 410          return NULL;
 411       break;
 412    }
 413
 414    default:
 415       return NULL;
 416    }
 417
 418
 419    bo = calloc(1, sizeof *bo);
 420    if (bo == NULL)
 421       return NULL;
 422
 423    bo->image = dri->image->dupImage(image, NULL);
 424
 425    if (usage & GBM_BO_USE_SCANOUT)
 426       dri_use |= __DRI_IMAGE_USE_SCANOUT;
 427    if (usage & GBM_BO_USE_CURSOR_64X64)
 428       dri_use |= __DRI_IMAGE_USE_CURSOR;
 429    if (dri->image->base.version >= 2 &&
 430        !dri->image->validateUsage(bo->image, dri_use)) {
 431       free(bo);
 432       return NULL;
 433    }
 434
 435    bo->base.base.gbm = gbm;
 436    bo->base.base.format = gbm_format;
 437
 438    dri->image->queryImage(bo->image, __DRI_IMAGE_ATTRIB_WIDTH,
 439                           (int*)&bo->base.base.width);
 440    dri->image->queryImage(bo->image, __DRI_IMAGE_ATTRIB_HEIGHT,
 441                           (int*)&bo->base.base.height);
 442    dri->image->queryImage(bo->image, __DRI_IMAGE_ATTRIB_STRIDE,
 443                           (int*)&bo->base.base.stride);
 444    dri->image->queryImage(bo->image, __DRI_IMAGE_ATTRIB_HANDLE,
 445                           &bo->base.base.handle.s32);
 446
 447    return &bo->base.base;
 448 }
 449
 450 static struct gbm_bo *
 451 gbm_dri_bo_create(struct gbm_device *gbm,
 452                   uint32_t width, uint32_t height,
 453                   uint32_t format, uint32_t usage)
 454 {
 455    struct gbm_dri_device *dri = gbm_dri_device(gbm);
 456    struct gbm_dri_bo *bo;
 457    int dri_format;
 458    unsigned dri_use = 0;
 459
 460    bo = calloc(1, sizeof *bo);
 461    if (bo == NULL)
 462       return NULL;
 463
 464    bo->base.base.gbm = gbm;
 465    bo->base.base.width = width;
 466    bo->base.base.height = height;
 467
 468    if (usage & GBM_BO_USE_WRITE) {
 469       int ret;
 470       unsigned attrs[7] = {
 471          KMS_WIDTH, 64,
 472          KMS_HEIGHT, 64,
 473          KMS_BO_TYPE, KMS_BO_TYPE_SCANOUT_X8R8G8B8,
 474          KMS_TERMINATE_PROP_LIST,
 475       };
 476
 477       if (!(usage & GBM_BO_USE_CURSOR_64X64))
 478          return NULL;
 479
 480       if (dri->kms == NULL)
 481          return NULL;
 482
 483       ret = kms_bo_create(dri->kms, attrs, &bo->bo);
 484       if (ret < 0) {
 485          free(bo);
 486          return NULL;
 487       }
 488
 489       kms_bo_get_prop(bo->bo, KMS_PITCH, &bo->base.base.stride);
 490       kms_bo_get_prop(bo->bo, KMS_HANDLE, (unsigned*)&bo->base.base.handle);
 491
 492       return &bo->base.base;
 493    }
 494
 495    switch (format) {
 496    case GBM_FORMAT_RGB565:
 497       dri_format =__DRI_IMAGE_FORMAT_RGB565;
 498       break;
 499    case GBM_FORMAT_XRGB8888:
 500    case GBM_BO_FORMAT_XRGB8888:
 501       dri_format = __DRI_IMAGE_FORMAT_XRGB8888;
 502       break;
 503    case GBM_FORMAT_ARGB8888:
 504    case GBM_BO_FORMAT_ARGB8888:
 505       dri_format = __DRI_IMAGE_FORMAT_ARGB8888;
 506       break;
 507    case GBM_FORMAT_ABGR8888:
 508       dri_format = __DRI_IMAGE_FORMAT_ABGR8888;
 509       break;
 510    default:
 511       return NULL;
 512    }
 513
 514    if (usage & GBM_BO_USE_SCANOUT)
 515       dri_use |= __DRI_IMAGE_USE_SCANOUT;
 516    if (usage & GBM_BO_USE_CURSOR_64X64)
 517       dri_use |= __DRI_IMAGE_USE_CURSOR;
 518
 519    /* Gallium drivers requires shared in order to get the handle/stride */
 520    dri_use |= __DRI_IMAGE_USE_SHARE;
 521
 522    bo->image =
 523       dri->image->createImage(dri->screen,
 524                               width, height,
 525                               dri_format, dri_use,
 526                               bo);
 527    if (bo->image == NULL)
 528       return NULL;
 529
 530    dri->image->queryImage(bo->image, __DRI_IMAGE_ATTRIB_HANDLE,
 531                           &bo->base.base.handle.s32);
 532    dri->image->queryImage(bo->image, __DRI_IMAGE_ATTRIB_STRIDE,
 533                           (int *) &bo->base.base.stride);
 534
 535    return &bo->base.base;
 536 }
 537
 538 static struct gbm_surface *
 539 gbm_dri_surface_create(struct gbm_device *gbm,
 540                        uint32_t width, uint32_t height,
 541                        uint32_t format, uint32_t flags)
 542 {
 543    struct gbm_dri_surface *surf;
 544
 545    surf = calloc(1, sizeof *surf);
 546    if (surf == NULL)
 547       return NULL;
 548
 549    surf->base.gbm = gbm;
 550    surf->base.width = width;
 551    surf->base.height = height;
 552    surf->base.format = format;
 553    surf->base.flags = flags;
 554
 555    return &surf->base;
 556 }
 557
 558 static void
 559 gbm_dri_surface_destroy(struct gbm_surface *_surf)
 560 {
 561    struct gbm_dri_surface *surf = gbm_dri_surface(_surf);
 562
 563    free(surf);
 564 }
 565
 566 static void
 567 dri_destroy(struct gbm_device *gbm)
 568 {
 569    struct gbm_dri_device *dri = gbm_dri_device(gbm);
 570
 571    dri->core->destroyScreen(dri->screen);
 572    free(dri->driver_configs);
 573    dlclose(dri->driver);
 574    free(dri->base.driver_name);
 575
 576    free(dri);
 577 }
 578
 579 static struct gbm_device *
 580 dri_device_create(int fd)
 581 {
 582    struct gbm_dri_device *dri;
 583    int ret;
 584
 585    dri = calloc(1, sizeof *dri);
 586
 587    dri->base.base.fd = fd;
 588    dri->base.base.bo_create = gbm_dri_bo_create;
 589    dri->base.base.bo_import = gbm_dri_bo_import;
 590    dri->base.base.is_format_supported = gbm_dri_is_format_supported;
 591    dri->base.base.bo_write = gbm_dri_bo_write;
 592    dri->base.base.bo_destroy = gbm_dri_bo_destroy;
 593    dri->base.base.destroy = dri_destroy;
 594    dri->base.base.surface_create = gbm_dri_surface_create;
 595    dri->base.base.surface_destroy = gbm_dri_surface_destroy;
 596
 597    dri->base.type = GBM_DRM_DRIVER_TYPE_DRI;
 598    dri->base.base.name = "drm";
 599
 600    kms_create(fd, &dri->kms);
 601    if (dri->kms == NULL)
 602       goto err_kms;
 603
 604    ret = dri_screen_create(dri);
 605    if (ret)
 606       goto err_dri;
 607
 608    return &dri->base.base;
 609
 610 err_dri:
 611    kms_destroy(&dri->kms);
 612 err_kms:
 613    free(dri);
 614    return NULL;
 615 }
 616
 617 struct gbm_backend gbm_dri_backend = {
 618    .backend_name = "dri",
 619    .create_device = dri_device_create,
 620 };