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