pipe_loader.c revision 848b8605 
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 VMWARE 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
37static 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
44int
45pipe_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
55void
56pipe_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
64const struct drm_conf_ret *
65pipe_loader_configuration(struct pipe_loader_device *dev,
66                          enum drm_conf conf)
67{
68   return dev->ops->configuration(dev, conf);
69}
70
71struct pipe_screen *
72pipe_loader_create_screen(struct pipe_loader_device *dev,
73                          const char *library_paths)
74{
75   return dev->ops->create_screen(dev, library_paths);
76}
77
78struct util_dl_library *
79pipe_loader_find_module(struct pipe_loader_device *dev,
80                        const char *library_paths)
81{
82   struct util_dl_library *lib;
83   const char *next;
84   char path[PATH_MAX];
85   int len, ret;
86
87   for (next = library_paths; *next; library_paths = next + 1) {
88      next = util_strchrnul(library_paths, ':');
89      len = next - library_paths;
90
91      if (len)
92         ret = util_snprintf(path, sizeof(path), "%.*s/%s%s%s",
93                             len, library_paths,
94                             MODULE_PREFIX, dev->driver_name, UTIL_DL_EXT);
95      else
96         ret = util_snprintf(path, sizeof(path), "%s%s%s",
97                             MODULE_PREFIX, dev->driver_name, UTIL_DL_EXT);
98
99      if (ret > 0 && ret < sizeof(path)) {
100         lib = util_dl_open(path);
101         if (lib) {
102            return lib;
103         }
104      }
105   }
106
107   return NULL;
108}
109