1 /**************************************************************************
2 *
3 * Copyright 2012 Francisco Jerez
4 * All Rights Reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
13 *
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
16 * of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25 *
26 **************************************************************************/
27
28 #include "pipe_loader_priv.h"
29
30 #include "util/u_inlines.h"
31 #include "util/u_memory.h"
32 #include "util/u_string.h"
33 #include "util/u_dl.h"
34
35 #define MODULE_PREFIX "pipe_"
36
37 static int (*backends[])(struct pipe_loader_device **, int) = {
38 #ifdef HAVE_PIPE_LOADER_DRM
39 &pipe_loader_drm_probe,
40 #endif
41 &pipe_loader_sw_probe
42 };
43
44 int
pipe_loader_probe(struct pipe_loader_device ** devs,int ndev)45 pipe_loader_probe(struct pipe_loader_device **devs, int ndev)
46 {
47 int i, n = 0;
48
49 for (i = 0; i < Elements(backends); i++)
50 n += backends[i](&devs[n], MAX2(0, ndev - n));
51
52 return n;
53 }
54
55 void
pipe_loader_release(struct pipe_loader_device ** devs,int ndev)56 pipe_loader_release(struct pipe_loader_device **devs, int ndev)
57 {
58 int i;
59
60 for (i = 0; i < ndev; i++)
61 devs[i]->ops->release(&devs[i]);
62 }
63
64 struct pipe_screen *
pipe_loader_create_screen(struct pipe_loader_device * dev,const char * library_paths)65 pipe_loader_create_screen(struct pipe_loader_device *dev,
66 const char *library_paths)
67 {
68 return dev->ops->create_screen(dev, library_paths);
69 }
70
71 struct util_dl_library *
pipe_loader_find_module(struct pipe_loader_device * dev,const char * library_paths)72 pipe_loader_find_module(struct pipe_loader_device *dev,
73 const char *library_paths)
74 {
75 struct util_dl_library *lib;
76 const char *next;
77 char path[PATH_MAX];
78 int len, ret;
79
80 for (next = library_paths; *next; library_paths = next + 1) {
81 next = util_strchrnul(library_paths, ':');
82 len = next - library_paths;
83
84 if (len)
85 ret = util_snprintf(path, sizeof(path), "%.*s/%s%s%s",
86 len, library_paths,
87 MODULE_PREFIX, dev->driver_name, UTIL_DL_EXT);
88 else
89 ret = util_snprintf(path, sizeof(path), "%s%s%s",
90 MODULE_PREFIX, dev->driver_name, UTIL_DL_EXT);
91
92 if (ret > 0 && ret < sizeof(path)) {
93 lib = util_dl_open(path);
94 if (lib) {
95 debug_printf("loaded %s\n", path);
96 return lib;
97 }
98 }
99 }
100
101 return NULL;
102 }
103