src/gallium/auxiliary/pipe-loader/pipe_loader.c

   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
  46 static 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
  53 const char gallium_driinfo_xml[] =
  54    DRI_CONF_BEGIN
  55 #include "driinfo_gallium.h"
  56    DRI_CONF_END
  57 ;
  58
  59 int
  60 pipe_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
  70 void
  71 pipe_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
  79 void
  80 pipe_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
  89 const struct drm_conf_ret *
  90 pipe_loader_configuration(struct pipe_loader_device *dev,
  91                           enum drm_conf conf)
  92 {
  93    return dev->ops->configuration(dev, conf);
  94 }
  95
  96 void
  97 pipe_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);
 112 }
 113
 114 char *
 115 pipe_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
 129 struct pipe_screen *
 130 pipe_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
 140 struct util_dl_library *
 141 pipe_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 }