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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             debug_printf("loaded %s\n", path);
     96             return lib;
     97          }
     98       }
     99    }
    100 
    101    return NULL;
    102 }
    103