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