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 "gbm_gallium_drmint.h"
29
30#include "util/u_memory.h"
31#include "util/u_inlines.h"
32#include "pipe-loader/pipe_loader.h"
33
34static const char *
35get_library_search_path(void)
36{
37   const char *search_path = NULL;
38
39   /* don't allow setuid apps to use GBM_BACKENDS_PATH */
40   if (geteuid() == getuid())
41      search_path = getenv("GBM_BACKENDS_PATH");
42   if (search_path == NULL)
43      search_path = PIPE_SEARCH_DIR;
44
45   return search_path;
46}
47
48int
49gallium_screen_create(struct gbm_gallium_drm_device *gdrm)
50{
51   struct pipe_loader_device *dev;
52#ifdef HAVE_PIPE_LOADER_DRM
53   int ret;
54
55   ret = pipe_loader_drm_probe_fd(&dev, gdrm->base.base.fd);
56   if (!ret)
57      return -1;
58#endif /* HAVE_PIPE_LOADER_DRM */
59
60   gdrm->screen = pipe_loader_create_screen(dev, get_library_search_path());
61   if (gdrm->screen == NULL) {
62      debug_printf("failed to load driver: %s\n", gdrm->base.driver_name);
63      pipe_loader_release(&dev, 1);
64      return -1;
65   };
66
67   gdrm->driver = dev;
68   gdrm->base.driver_name = strdup(dev->driver_name);
69   return 0;
70}
71
72void
73gallium_screen_destroy(struct gbm_gallium_drm_device *gdrm)
74{
75   FREE(gdrm->base.driver_name);
76   gdrm->screen->destroy(gdrm->screen);
77   pipe_loader_release((struct pipe_loader_device **)&gdrm->driver, 1);
78}
79
80GBM_EXPORT struct gbm_backend gbm_backend = {
81   .backend_name = "gallium_drm",
82   .create_device = gbm_gallium_drm_device_create,
83};
84