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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 TUNGSTEN GRAPHICS 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.  
  35. #define MODULE_PREFIX "pipe_"
  36.  
  37. static int (*backends[])(struct pipe_loader_device **, int) = {
  38. #ifdef HAVE_PIPE_LOADER_DRM
  39.    &pipe_loader_drm_probe,
  40. #endif
  41.    &pipe_loader_sw_probe
  42. };
  43.  
  44. int
  45. pipe_loader_probe(struct pipe_loader_device **devs, int ndev)
  46. {
  47.    int i, n = 0;
  48.  
  49.    for (i = 0; i < Elements(backends); i++)
  50.       n += backends[i](&devs[n], MAX2(0, ndev - n));
  51.  
  52.    return n;
  53. }
  54.  
  55. void
  56. pipe_loader_release(struct pipe_loader_device **devs, int ndev)
  57. {
  58.    int i;
  59.  
  60.    for (i = 0; i < ndev; i++)
  61.       devs[i]->ops->release(&devs[i]);
  62. }
  63.  
  64. struct pipe_screen *
  65. pipe_loader_create_screen(struct pipe_loader_device *dev,
  66.                           const char *library_paths)
  67. {
  68.    return dev->ops->create_screen(dev, library_paths);
  69. }
  70.  
  71. struct util_dl_library *
  72. pipe_loader_find_module(struct pipe_loader_device *dev,
  73.                         const char *library_paths)
  74. {
  75.    struct util_dl_library *lib;
  76.    const char *next;
  77.    char path[PATH_MAX];
  78.    int len, ret;
  79.  
  80.    for (next = library_paths; *next; library_paths = next + 1) {
  81.       next = util_strchrnul(library_paths, ':');
  82.       len = next - library_paths;
  83.  
  84.       if (len)
  85.          ret = util_snprintf(path, sizeof(path), "%.*s/%s%s%s",
  86.                              len, library_paths,
  87.                              MODULE_PREFIX, dev->driver_name, UTIL_DL_EXT);
  88.       else
  89.          ret = util_snprintf(path, sizeof(path), "%s%s%s",
  90.                              MODULE_PREFIX, dev->driver_name, UTIL_DL_EXT);
  91.  
  92.       if (ret > 0 && ret < sizeof(path)) {
  93.          lib = util_dl_open(path);
  94.          if (lib) {
  95.             return lib;
  96.          }
  97.       }
  98.    }
  99.  
  100.    return NULL;
  101. }
  102.