src/gbm/backends/dri/driver_name.c

   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 }