src/egl/drivers/dri2/platform_drm.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  *    Kristian Høgsberg <krh@bitplanet.net>
  26  */
  27
  28 #include <stdlib.h>
  29 #include <stdio.h>
  30 #include <string.h>
  31 #include <xf86drm.h>
  32 #include <dlfcn.h>
  33 #include <sys/types.h>
  34 #include <sys/stat.h>
  35 #include <fcntl.h>
  36 #include <unistd.h>
  37
  38 #include "egl_dri2.h"
  39
  40 static struct gbm_bo *
  41 lock_front_buffer(struct gbm_surface *_surf)
  42 {
  43    struct gbm_dri_surface *surf = (struct gbm_dri_surface *) _surf;
  44    struct dri2_egl_surface *dri2_surf = surf->dri_private;
  45    struct gbm_bo *bo;
  46
  47    if (dri2_surf->current == NULL) {
  48       _eglError(EGL_BAD_SURFACE, "no front buffer");
  49       return NULL;
  50    }
  51
  52    bo = dri2_surf->current->bo;
  53    dri2_surf->current->locked = 1;
  54    dri2_surf->current = NULL;
  55
  56    return bo;
  57 }
  58
  59 static void
  60 release_buffer(struct gbm_surface *_surf, struct gbm_bo *bo)
  61 {
  62    struct gbm_dri_surface *surf = (struct gbm_dri_surface *) _surf;
  63    struct dri2_egl_surface *dri2_surf = surf->dri_private;
  64    int i;
  65
  66    for (i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++) {
  67       if (dri2_surf->color_buffers[i].bo == bo) {
  68          dri2_surf->color_buffers[i].locked = 0;
  69       }
  70    }
  71 }
  72
  73 static int
  74 has_free_buffers(struct gbm_surface *_surf)
  75 {
  76    struct gbm_dri_surface *surf = (struct gbm_dri_surface *) _surf;
  77    struct dri2_egl_surface *dri2_surf = surf->dri_private;
  78    int i;
  79
  80    for (i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++)
  81       if (!dri2_surf->color_buffers[i].locked)
  82          return 1;
  83
  84    return 0;
  85 }
  86
  87 static _EGLSurface *
  88 dri2_create_surface(_EGLDriver *drv, _EGLDisplay *disp, EGLint type,
  89                     _EGLConfig *conf, EGLNativeWindowType window,
  90                     const EGLint *attrib_list)
  91 {
  92    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
  93    struct dri2_egl_config *dri2_conf = dri2_egl_config(conf);
  94    struct dri2_egl_surface *dri2_surf;
  95    struct gbm_dri_surface *surf;
  96
  97    (void) drv;
  98
  99    dri2_surf = malloc(sizeof *dri2_surf);
 100    if (!dri2_surf) {
 101       _eglError(EGL_BAD_ALLOC, "dri2_create_surface");
 102       return NULL;
 103    }
 104
 105    memset(dri2_surf, 0, sizeof *dri2_surf);
 106    if (!_eglInitSurface(&dri2_surf->base, disp, type, conf, attrib_list))
 107       goto cleanup_surf;
 108
 109    switch (type) {
 110    case EGL_WINDOW_BIT:
 111       if (!window)
 112          return NULL;
 113       surf = gbm_dri_surface((struct gbm_surface *) window);
 114       dri2_surf->gbm_surf = surf;
 115       dri2_surf->base.Width =  surf->base.width;
 116       dri2_surf->base.Height = surf->base.height;
 117       surf->dri_private = dri2_surf;
 118       break;
 119    default:
 120       goto cleanup_surf;
 121    }
 122
 123    dri2_surf->dri_drawable =
 124       (*dri2_dpy->dri2->createNewDrawable) (dri2_dpy->dri_screen,
 125                                             dri2_conf->dri_double_config,
 126                                             dri2_surf->gbm_surf);
 127
 128    if (dri2_surf->dri_drawable == NULL) {
 129       _eglError(EGL_BAD_ALLOC, "dri2->createNewDrawable");
 130       goto cleanup_surf;
 131    }
 132
 133    return &dri2_surf->base;
 134
 135  cleanup_surf:
 136    free(dri2_surf);
 137
 138    return NULL;
 139 }
 140
 141 static _EGLSurface *
 142 dri2_create_window_surface(_EGLDriver *drv, _EGLDisplay *disp,
 143                            _EGLConfig *conf, EGLNativeWindowType window,
 144                            const EGLint *attrib_list)
 145 {
 146    return dri2_create_surface(drv, disp, EGL_WINDOW_BIT, conf,
 147                               window, attrib_list);
 148 }
 149
 150 static EGLBoolean
 151 dri2_destroy_surface(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf)
 152 {
 153    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 154    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 155    int i;
 156
 157    if (!_eglPutSurface(surf))
 158       return EGL_TRUE;
 159
 160    (*dri2_dpy->core->destroyDrawable)(dri2_surf->dri_drawable);
 161
 162    for (i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++) {
 163       if (dri2_surf->color_buffers[i].bo)
 164          gbm_bo_destroy(dri2_surf->color_buffers[i].bo);
 165    }
 166
 167    for (i = 0; i < __DRI_BUFFER_COUNT; i++) {
 168       if (dri2_surf->dri_buffers[i])
 169          dri2_dpy->dri2->releaseBuffer(dri2_dpy->dri_screen,
 170                                        dri2_surf->dri_buffers[i]);
 171    }
 172
 173    free(surf);
 174
 175    return EGL_TRUE;
 176 }
 177
 178 static int
 179 get_back_bo(struct dri2_egl_surface *dri2_surf, __DRIbuffer *buffer)
 180 {
 181    struct dri2_egl_display *dri2_dpy =
 182       dri2_egl_display(dri2_surf->base.Resource.Display);
 183    struct gbm_dri_bo *bo;
 184    struct gbm_dri_surface *surf = dri2_surf->gbm_surf;
 185    int i, name, pitch;
 186
 187    if (dri2_surf->back == NULL) {
 188       for (i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++) {
 189          if (!dri2_surf->color_buffers[i].locked) {
 190             dri2_surf->back = &dri2_surf->color_buffers[i];
 191             break;
 192          }
 193       }
 194    }
 195
 196    if (dri2_surf->back == NULL)
 197       return -1;
 198    if (dri2_surf->back->bo == NULL)
 199       dri2_surf->back->bo = gbm_bo_create(&dri2_dpy->gbm_dri->base.base,
 200                                           surf->base.width, surf->base.height,
 201                                           surf->base.format, surf->base.flags);
 202    if (dri2_surf->back->bo == NULL)
 203       return -1;
 204
 205    bo = (struct gbm_dri_bo *) dri2_surf->back->bo;
 206
 207    dri2_dpy->image->queryImage(bo->image, __DRI_IMAGE_ATTRIB_NAME, &name);
 208    dri2_dpy->image->queryImage(bo->image, __DRI_IMAGE_ATTRIB_STRIDE, &pitch);
 209
 210    buffer->attachment = __DRI_BUFFER_BACK_LEFT;
 211    buffer->name = name;
 212    buffer->pitch = pitch;
 213    buffer->cpp = 4;
 214    buffer->flags = 0;
 215
 216    return 0;
 217 }
 218
 219 static int
 220 get_aux_bo(struct dri2_egl_surface *dri2_surf,
 221            unsigned int attachment, unsigned int format, __DRIbuffer *buffer)
 222 {
 223    struct dri2_egl_display *dri2_dpy =
 224       dri2_egl_display(dri2_surf->base.Resource.Display);
 225    __DRIbuffer *b = dri2_surf->dri_buffers[attachment];
 226
 227    if (b == NULL) {
 228       b = dri2_dpy->dri2->allocateBuffer(dri2_dpy->dri_screen,
 229                                          attachment, format,
 230                                          dri2_surf->base.Width,
 231                                          dri2_surf->base.Height);
 232       dri2_surf->dri_buffers[attachment] = b;
 233    }
 234    if (b == NULL)
 235       return -1;
 236
 237    memcpy(buffer, b, sizeof *buffer);
 238
 239    return 0;
 240 }
 241
 242 static __DRIbuffer *
 243 dri2_get_buffers_with_format(__DRIdrawable *driDrawable,
 244                              int *width, int *height,
 245                              unsigned int *attachments, int count,
 246                              int *out_count, void *loaderPrivate)
 247 {
 248    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 249    int i, j;
 250
 251    dri2_surf->buffer_count = 0;
 252    for (i = 0, j = 0; i < 2 * count; i += 2, j++) {
 253       assert(attachments[i] < __DRI_BUFFER_COUNT);
 254       assert(dri2_surf->buffer_count < 5);
 255
 256       switch (attachments[i]) {
 257       case __DRI_BUFFER_BACK_LEFT:
 258          if (get_back_bo(dri2_surf, &dri2_surf->buffers[j]) < 0) {
 259             _eglError(EGL_BAD_ALLOC, "failed to allocate color buffer");
 260             return NULL;
 261          }
 262          break;
 263       default:
 264          if (get_aux_bo(dri2_surf, attachments[i], attachments[i + 1],
 265                         &dri2_surf->buffers[j]) < 0) {
 266             _eglError(EGL_BAD_ALLOC, "failed to allocate aux buffer");
 267             return NULL;
 268          }
 269          break;
 270       }
 271    }
 272
 273    *out_count = j;
 274    if (j == 0)
 275       return NULL;
 276
 277    *width = dri2_surf->base.Width;
 278    *height = dri2_surf->base.Height;
 279
 280    return dri2_surf->buffers;
 281 }
 282
 283 static __DRIbuffer *
 284 dri2_get_buffers(__DRIdrawable * driDrawable,
 285                  int *width, int *height,
 286                  unsigned int *attachments, int count,
 287                  int *out_count, void *loaderPrivate)
 288 {
 289    unsigned int *attachments_with_format;
 290    __DRIbuffer *buffer;
 291    const unsigned int format = 32;
 292    int i;
 293
 294    attachments_with_format = calloc(count * 2, sizeof(unsigned int));
 295    if (!attachments_with_format) {
 296       *out_count = 0;
 297       return NULL;
 298    }
 299
 300    for (i = 0; i < count; ++i) {
 301       attachments_with_format[2*i] = attachments[i];
 302       attachments_with_format[2*i + 1] = format;
 303    }
 304
 305    buffer =
 306       dri2_get_buffers_with_format(driDrawable,
 307                                    width, height,
 308                                    attachments_with_format, count,
 309                                    out_count, loaderPrivate);
 310
 311    free(attachments_with_format);
 312
 313    return buffer;
 314 }
 315
 316 static void
 317 dri2_flush_front_buffer(__DRIdrawable * driDrawable, void *loaderPrivate)
 318 {
 319    (void) driDrawable;
 320    (void) loaderPrivate;
 321 }
 322
 323 static EGLBoolean
 324 dri2_swap_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw)
 325 {
 326    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 327    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 328
 329    if (dri2_surf->base.Type == EGL_WINDOW_BIT) {
 330       if (dri2_surf->current)
 331          _eglError(EGL_BAD_SURFACE, "dri2_swap_buffers");
 332       dri2_surf->current = dri2_surf->back;
 333       dri2_surf->back = NULL;
 334    }
 335
 336    (*dri2_dpy->flush->flush)(dri2_surf->dri_drawable);
 337    (*dri2_dpy->flush->invalidate)(dri2_surf->dri_drawable);
 338
 339    return EGL_TRUE;
 340 }
 341
 342 static _EGLImage *
 343 dri2_create_image_khr_pixmap(_EGLDisplay *disp, _EGLContext *ctx,
 344                              EGLClientBuffer buffer, const EGLint *attr_list)
 345 {
 346    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 347    struct gbm_dri_bo *dri_bo = gbm_dri_bo((struct gbm_bo *) buffer);
 348    struct dri2_egl_image *dri2_img;
 349
 350    dri2_img = malloc(sizeof *dri2_img);
 351    if (!dri2_img) {
 352       _eglError(EGL_BAD_ALLOC, "dri2_create_image_khr_pixmap");
 353       return NULL;
 354    }
 355
 356    if (!_eglInitImage(&dri2_img->base, disp)) {
 357       free(dri2_img);
 358       return NULL;
 359    }
 360
 361    dri2_img->dri_image = dri2_dpy->image->dupImage(dri_bo->image, dri2_img);
 362    if (dri2_img->dri_image == NULL) {
 363       free(dri2_img);
 364       _eglError(EGL_BAD_ALLOC, "dri2_create_image_khr_pixmap");
 365       return NULL;
 366    }
 367
 368    return &dri2_img->base;
 369 }
 370
 371 static _EGLImage *
 372 dri2_drm_create_image_khr(_EGLDriver *drv, _EGLDisplay *disp,
 373                           _EGLContext *ctx, EGLenum target,
 374                           EGLClientBuffer buffer, const EGLint *attr_list)
 375 {
 376    (void) drv;
 377
 378    switch (target) {
 379    case EGL_NATIVE_PIXMAP_KHR:
 380       return dri2_create_image_khr_pixmap(disp, ctx, buffer, attr_list);
 381    default:
 382       return dri2_create_image_khr(drv, disp, ctx, target, buffer, attr_list);
 383    }
 384 }
 385
 386 static int
 387 dri2_drm_authenticate(_EGLDisplay *disp, uint32_t id)
 388 {
 389    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 390
 391    return drmAuthMagic(dri2_dpy->fd, id);
 392 }
 393
 394 EGLBoolean
 395 dri2_initialize_drm(_EGLDriver *drv, _EGLDisplay *disp)
 396 {
 397    struct dri2_egl_display *dri2_dpy;
 398    struct gbm_device *gbm;
 399    int fd = -1;
 400    int i;
 401
 402    dri2_dpy = malloc(sizeof *dri2_dpy);
 403    if (!dri2_dpy)
 404       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
 405
 406    memset(dri2_dpy, 0, sizeof *dri2_dpy);
 407
 408    disp->DriverData = (void *) dri2_dpy;
 409
 410    gbm = disp->PlatformDisplay;
 411    if (gbm == NULL) {
 412       fd = open("/dev/dri/card0", O_RDWR);
 413       dri2_dpy->own_device = 1;
 414       gbm = gbm_create_device(fd);
 415       if (gbm == NULL)
 416          return EGL_FALSE;
 417    }
 418
 419    if (strcmp(gbm_device_get_backend_name(gbm), "drm") != 0) {
 420       free(dri2_dpy);
 421       return EGL_FALSE;
 422    }
 423
 424    dri2_dpy->gbm_dri = gbm_dri_device(gbm);
 425    if (dri2_dpy->gbm_dri->base.type != GBM_DRM_DRIVER_TYPE_DRI) {
 426       free(dri2_dpy);
 427       return EGL_FALSE;
 428    }
 429
 430    if (fd < 0) {
 431       fd = dup(gbm_device_get_fd(gbm));
 432       if (fd < 0) {
 433          free(dri2_dpy);
 434          return EGL_FALSE;
 435       }
 436    }
 437
 438    dri2_dpy->fd = fd;
 439    dri2_dpy->device_name = dri2_get_device_name_for_fd(dri2_dpy->fd);
 440    dri2_dpy->driver_name = dri2_dpy->gbm_dri->base.driver_name;
 441
 442    dri2_dpy->dri_screen = dri2_dpy->gbm_dri->screen;
 443    dri2_dpy->core = dri2_dpy->gbm_dri->core;
 444    dri2_dpy->dri2 = dri2_dpy->gbm_dri->dri2;
 445    dri2_dpy->image = dri2_dpy->gbm_dri->image;
 446    dri2_dpy->flush = dri2_dpy->gbm_dri->flush;
 447    dri2_dpy->driver_configs = dri2_dpy->gbm_dri->driver_configs;
 448
 449    dri2_dpy->gbm_dri->lookup_image = dri2_lookup_egl_image;
 450    dri2_dpy->gbm_dri->lookup_user_data = disp;
 451
 452    dri2_dpy->gbm_dri->get_buffers = dri2_get_buffers;
 453    dri2_dpy->gbm_dri->flush_front_buffer = dri2_flush_front_buffer;
 454    dri2_dpy->gbm_dri->get_buffers_with_format = dri2_get_buffers_with_format;
 455
 456    dri2_dpy->gbm_dri->base.base.surface_lock_front_buffer = lock_front_buffer;
 457    dri2_dpy->gbm_dri->base.base.surface_release_buffer = release_buffer;
 458    dri2_dpy->gbm_dri->base.base.surface_has_free_buffers = has_free_buffers;
 459
 460    dri2_setup_screen(disp);
 461
 462    for (i = 0; dri2_dpy->driver_configs[i]; i++)
 463       dri2_add_config(disp, dri2_dpy->driver_configs[i],
 464                       i + 1, 0, EGL_WINDOW_BIT, NULL, NULL);
 465
 466    drv->API.CreateWindowSurface = dri2_create_window_surface;
 467    drv->API.DestroySurface = dri2_destroy_surface;
 468    drv->API.SwapBuffers = dri2_swap_buffers;
 469    drv->API.CreateImageKHR = dri2_drm_create_image_khr;
 470
 471 #ifdef HAVE_WAYLAND_PLATFORM
 472    disp->Extensions.WL_bind_wayland_display = EGL_TRUE;
 473 #endif
 474    dri2_dpy->authenticate = dri2_drm_authenticate;
 475
 476    /* we're supporting EGL 1.4 */
 477    disp->VersionMajor = 1;
 478    disp->VersionMinor = 4;
 479
 480    return EGL_TRUE;
 481 }