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
38char *
39dri_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
84out:
85   udev_device_unref(device);
86   udev_unref(udev);
87
88   return driver;
89}
90