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