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 _EGLImage *
  41 dri2_create_image_khr_pixmap(_EGLDisplay *disp, _EGLContext *ctx,
  42                              EGLClientBuffer buffer, const EGLint *attr_list)
  43 {
  44    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
  45    struct gbm_dri_bo *dri_bo = gbm_dri_bo((struct gbm_bo *) buffer);
  46    struct dri2_egl_image *dri2_img;
  47
  48    dri2_img = malloc(sizeof *dri2_img);
  49    if (!dri2_img) {
  50       _eglError(EGL_BAD_ALLOC, "dri2_create_image_khr_pixmap");
  51       return NULL;
  52    }
  53
  54    if (!_eglInitImage(&dri2_img->base, disp)) {
  55       free(dri2_img);
  56       return NULL;
  57    }
  58
  59    dri2_img->dri_image = dri2_dpy->image->dupImage(dri_bo->image, dri2_img);
  60    if (dri2_img->dri_image == NULL) {
  61       free(dri2_img);
  62       _eglError(EGL_BAD_ALLOC, "dri2_create_image_khr_pixmap");
  63       return NULL;
  64    }
  65
  66    return &dri2_img->base;
  67 }
  68
  69 static _EGLImage *
  70 dri2_drm_create_image_khr(_EGLDriver *drv, _EGLDisplay *disp,
  71                           _EGLContext *ctx, EGLenum target,
  72                           EGLClientBuffer buffer, const EGLint *attr_list)
  73 {
  74    (void) drv;
  75
  76    switch (target) {
  77    case EGL_NATIVE_PIXMAP_KHR:
  78       return dri2_create_image_khr_pixmap(disp, ctx, buffer, attr_list);
  79    default:
  80       return dri2_create_image_khr(drv, disp, ctx, target, buffer, attr_list);
  81    }
  82 }
  83
  84 static int
  85 dri2_drm_authenticate(_EGLDisplay *disp, uint32_t id)
  86 {
  87    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
  88
  89    return drmAuthMagic(dri2_dpy->fd, id);
  90 }
  91
  92 EGLBoolean
  93 dri2_initialize_drm(_EGLDriver *drv, _EGLDisplay *disp)
  94 {
  95    struct dri2_egl_display *dri2_dpy;
  96    struct gbm_device *gbm;
  97    int fd = -1;
  98    int i;
  99
 100    dri2_dpy = malloc(sizeof *dri2_dpy);
 101    if (!dri2_dpy)
 102       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
 103
 104    memset(dri2_dpy, 0, sizeof *dri2_dpy);
 105
 106    disp->DriverData = (void *) dri2_dpy;
 107
 108    gbm = disp->PlatformDisplay;
 109    if (gbm == NULL) {
 110       fd = open("/dev/dri/card0", O_RDWR);
 111       dri2_dpy->own_gbm_device = 1;
 112       gbm = gbm_create_device(fd);
 113       if (gbm == NULL)
 114          return EGL_FALSE;
 115    }
 116
 117    if (strcmp(gbm_device_get_backend_name(gbm), "drm") != 0) {
 118       free(dri2_dpy);
 119       return EGL_FALSE;
 120    }
 121
 122    dri2_dpy->gbm_dri = gbm_dri_device(gbm);
 123    if (dri2_dpy->gbm_dri->base.type != GBM_DRM_DRIVER_TYPE_DRI) {
 124       free(dri2_dpy);
 125       return EGL_FALSE;
 126    }
 127
 128    if (fd < 0) {
 129       fd = dup(gbm_device_get_fd(gbm));
 130       if (fd < 0) {
 131          free(dri2_dpy);
 132          return EGL_FALSE;
 133       }
 134    }
 135
 136    dri2_dpy->fd = fd;
 137    dri2_dpy->device_name = dri2_get_device_name_for_fd(dri2_dpy->fd);
 138    dri2_dpy->driver_name = dri2_dpy->gbm_dri->base.driver_name;
 139
 140    dri2_dpy->dri_screen = dri2_dpy->gbm_dri->screen;
 141    dri2_dpy->core = dri2_dpy->gbm_dri->core;
 142    dri2_dpy->dri2 = dri2_dpy->gbm_dri->dri2;
 143    dri2_dpy->image = dri2_dpy->gbm_dri->image;
 144    dri2_dpy->driver_configs = dri2_dpy->gbm_dri->driver_configs;
 145
 146    dri2_dpy->gbm_dri->lookup_image = dri2_lookup_egl_image;
 147    dri2_dpy->gbm_dri->lookup_user_data = disp;
 148
 149    dri2_setup_screen(disp);
 150
 151    for (i = 0; dri2_dpy->driver_configs[i]; i++)
 152       dri2_add_config(disp, dri2_dpy->driver_configs[i],
 153                       i + 1, 0, 0, NULL);
 154
 155    drv->API.CreateImageKHR = dri2_drm_create_image_khr;
 156
 157 #ifdef HAVE_WAYLAND_PLATFORM
 158    disp->Extensions.WL_bind_wayland_display = EGL_TRUE;
 159 #endif
 160    dri2_dpy->authenticate = dri2_drm_authenticate;
 161
 162    /* we're supporting EGL 1.4 */
 163    disp->VersionMajor = 1;
 164    disp->VersionMinor = 4;
 165
 166    return EGL_TRUE;
 167 }