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  1. /*
  2.  * Copyright © 2011 Intel Corporation
  3.  *
  4.  * Permission is hereby granted, free of charge, to any person obtaining a
  5.  * copy of this software and associated documentation files (the "Software"),
  6.  * to deal in the Software without restriction, including without limitation
  7.  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  8.  * and/or sell copies of the Software, and to permit persons to whom the
  9.  * Software is furnished to do so, subject to the following conditions:
  10.  *
  11.  * The above copyright notice and this permission notice (including the next
  12.  * paragraph) shall be included in all copies or substantial portions of the
  13.  * Software.
  14.  *
  15.  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  16.  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  17.  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  18.  * NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
  19.  * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
  20.  * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21.  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  22.  * DEALINGS IN THE SOFTWARE.
  23.  *
  24.  * Authors:
  25.  *    Kristian Høgsberg <krh@bitplanet.net>
  26.  *    Benjamin Franzke <benjaminfranzke@googlemail.com>
  27.  */
  28.  
  29. #include <stdio.h>
  30. #include <string.h>
  31.  
  32. #include <libudev.h>
  33.  
  34. #include "gbm_driint.h"
  35. #define DRIVER_MAP_DRI2_ONLY
  36. #include "pci_ids/pci_id_driver_map.h"
  37.  
  38. char *
  39. dri_fd_get_driver_name(int fd)
  40. {
  41.    struct udev *udev;
  42.    struct udev_device *device, *parent;
  43.    const char *pci_id;
  44.    char *driver = NULL;
  45.    int vendor_id, chip_id, i, j;
  46.  
  47.    udev = udev_new();
  48.    device = _gbm_udev_device_new_from_fd(udev, fd);
  49.    if (device == NULL)
  50.       return NULL;
  51.  
  52.    parent = udev_device_get_parent(device);
  53.    if (parent == NULL) {
  54.       fprintf(stderr, "gbm: could not get parent device");
  55.       goto out;
  56.    }
  57.  
  58.    pci_id = udev_device_get_property_value(parent, "PCI_ID");
  59.    if (pci_id == NULL ||
  60.        sscanf(pci_id, "%x:%x", &vendor_id, &chip_id) != 2) {
  61.       fprintf(stderr, "gbm: malformed or no PCI ID");
  62.       goto out;
  63.    }
  64.  
  65.    for (i = 0; driver_map[i].driver; i++) {
  66.       if (vendor_id != driver_map[i].vendor_id)
  67.          continue;
  68.       if (driver_map[i].num_chips_ids == -1) {
  69.          driver = strdup(driver_map[i].driver);
  70.          _gbm_log("pci id for %d: %04x:%04x, driver %s",
  71.                   fd, vendor_id, chip_id, driver);
  72.          goto out;
  73.       }
  74.  
  75.       for (j = 0; j < driver_map[i].num_chips_ids; j++)
  76.          if (driver_map[i].chip_ids[j] == chip_id) {
  77.             driver = strdup(driver_map[i].driver);
  78.             _gbm_log("pci id for %d: %04x:%04x, driver %s",
  79.                      fd, vendor_id, chip_id, driver);
  80.             goto out;
  81.          }
  82.    }
  83.  
  84. out:
  85.    udev_device_unref(device);
  86.    udev_unref(udev);
  87.  
  88.    return driver;
  89. }
  90.