pipe_loader.c revision 01e04c3f 
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#include "util/xmlconfig.h"
35#include "util/xmlpool.h"
36
37#include <string.h>
38
39#ifdef _MSC_VER
40#include <stdlib.h>
41#define PATH_MAX _MAX_PATH
42#endif
43
44#define MODULE_PREFIX "pipe_"
45
46static int (*backends[])(struct pipe_loader_device **, int) = {
47#ifdef HAVE_LIBDRM
48   &pipe_loader_drm_probe,
49#endif
50   &pipe_loader_sw_probe
51};
52
53const char gallium_driinfo_xml[] =
54   DRI_CONF_BEGIN
55#include "driinfo_gallium.h"
56   DRI_CONF_END
57;
58
59int
60pipe_loader_probe(struct pipe_loader_device **devs, int ndev)
61{
62   int i, n = 0;
63
64   for (i = 0; i < ARRAY_SIZE(backends); i++)
65      n += backends[i](&devs[n], MAX2(0, ndev - n));
66
67   return n;
68}
69
70void
71pipe_loader_release(struct pipe_loader_device **devs, int ndev)
72{
73   int i;
74
75   for (i = 0; i < ndev; i++)
76      devs[i]->ops->release(&devs[i]);
77}
78
79void
80pipe_loader_base_release(struct pipe_loader_device **dev)
81{
82   driDestroyOptionCache(&(*dev)->option_cache);
83   driDestroyOptionInfo(&(*dev)->option_info);
84
85   FREE(*dev);
86   *dev = NULL;
87}
88
89const struct drm_conf_ret *
90pipe_loader_configuration(struct pipe_loader_device *dev,
91                          enum drm_conf conf)
92{
93   return dev->ops->configuration(dev, conf);
94}
95
96void
97pipe_loader_load_options(struct pipe_loader_device *dev)
98{
99   if (dev->option_info.info)
100      return;
101
102   const char *xml_options = gallium_driinfo_xml;
103   const struct drm_conf_ret *xml_options_conf =
104      pipe_loader_configuration(dev, DRM_CONF_XML_OPTIONS);
105
106   if (xml_options_conf)
107      xml_options = xml_options_conf->val.val_pointer;
108
109   driParseOptionInfo(&dev->option_info, xml_options);
110   driParseConfigFiles(&dev->option_cache, &dev->option_info, 0,
111                       dev->driver_name, NULL);
112}
113
114char *
115pipe_loader_get_driinfo_xml(const char *driver_name)
116{
117#ifdef HAVE_LIBDRM
118   char *xml = pipe_loader_drm_get_driinfo_xml(driver_name);
119#else
120   char *xml = NULL;
121#endif
122
123   if (!xml)
124      xml = strdup(gallium_driinfo_xml);
125
126   return xml;
127}
128
129struct pipe_screen *
130pipe_loader_create_screen(struct pipe_loader_device *dev)
131{
132   struct pipe_screen_config config;
133
134   pipe_loader_load_options(dev);
135   config.options = &dev->option_cache;
136
137   return dev->ops->create_screen(dev, &config);
138}
139
140struct util_dl_library *
141pipe_loader_find_module(const char *driver_name,
142                        const char *library_paths)
143{
144   struct util_dl_library *lib;
145   const char *next;
146   char path[PATH_MAX];
147   int len, ret;
148
149   for (next = library_paths; *next; library_paths = next + 1) {
150      next = util_strchrnul(library_paths, ':');
151      len = next - library_paths;
152
153      if (len)
154         ret = util_snprintf(path, sizeof(path), "%.*s/%s%s%s",
155                             len, library_paths,
156                             MODULE_PREFIX, driver_name, UTIL_DL_EXT);
157      else
158         ret = util_snprintf(path, sizeof(path), "%s%s%s",
159                             MODULE_PREFIX, driver_name, UTIL_DL_EXT);
160
161      if (ret > 0 && ret < sizeof(path)) {
162         lib = util_dl_open(path);
163         if (lib) {
164            return lib;
165         }
166      }
167   }
168
169   return NULL;
170}
171