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
34 static const char *
get_library_search_path(void)35 get_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
48 int
gallium_screen_create(struct gbm_gallium_drm_device * gdrm)49 gallium_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
72 void
gallium_screen_destroy(struct gbm_gallium_drm_device * gdrm)73 gallium_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
80 GBM_EXPORT struct gbm_backend gbm_backend = {
81 .backend_name = "gallium_drm",
82 .create_device = gbm_gallium_drm_device_create,
83 };
84