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      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 }
    171