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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 <sys/types.h>
  33. #include <sys/stat.h>
  34. #include <unistd.h>
  35.  
  36. #include "egl_dri2.h"
  37.  
  38. #ifdef HAVE_LIBUDEV
  39.  
  40. #define DRIVER_MAP_DRI2_ONLY
  41. #include "pci_ids/pci_id_driver_map.h"
  42.  
  43. #include <libudev.h>
  44.  
  45. static struct udev_device *
  46. dri2_udev_device_new_from_fd(struct udev *udev, int fd)
  47. {
  48.    struct udev_device *device;
  49.    struct stat buf;
  50.  
  51.    if (fstat(fd, &buf) < 0) {
  52.       _eglLog(_EGL_WARNING, "EGL-DRI2: failed to stat fd %d", fd);
  53.       return NULL;
  54.    }
  55.  
  56.    device = udev_device_new_from_devnum(udev, 'c', buf.st_rdev);
  57.    if (device == NULL) {
  58.       _eglLog(_EGL_WARNING,
  59.               "EGL-DRI2: could not create udev device for fd %d", fd);
  60.       return NULL;
  61.    }
  62.  
  63.    return device;
  64. }
  65.  
  66. char *
  67. dri2_get_device_name_for_fd(int fd)
  68. {
  69.    struct udev *udev;
  70.    struct udev_device *device;
  71.    const char *const_device_name;
  72.    char *device_name = NULL;
  73.  
  74.    udev = udev_new();
  75.    device = dri2_udev_device_new_from_fd(udev, fd);
  76.    if (device == NULL)
  77.       return NULL;
  78.  
  79.    const_device_name = udev_device_get_devnode(device);
  80.    if (!const_device_name)
  81.       goto out;
  82.    device_name = strdup(const_device_name);
  83.  
  84. out:
  85.    udev_device_unref(device);
  86.    udev_unref(udev);
  87.  
  88.    return device_name;
  89. }
  90.  
  91. char *
  92. dri2_get_driver_for_fd(int fd)
  93. {
  94.    struct udev *udev;
  95.    struct udev_device *device, *parent;
  96.    const char *pci_id;
  97.    char *driver = NULL;
  98.    int vendor_id, chip_id, i, j;
  99.  
  100.    udev = udev_new();
  101.    device = dri2_udev_device_new_from_fd(udev, fd);
  102.    if (device == NULL)
  103.       return NULL;
  104.  
  105.    parent = udev_device_get_parent(device);
  106.    if (parent == NULL) {
  107.       _eglLog(_EGL_WARNING, "DRI2: could not get parent device");
  108.       goto out;
  109.    }
  110.  
  111.    pci_id = udev_device_get_property_value(parent, "PCI_ID");
  112.    if (pci_id == NULL ||
  113.        sscanf(pci_id, "%x:%x", &vendor_id, &chip_id) != 2) {
  114.       _eglLog(_EGL_WARNING, "EGL-DRI2: malformed or no PCI ID");
  115.       goto out;
  116.    }
  117.  
  118.    for (i = 0; driver_map[i].driver; i++) {
  119.       if (vendor_id != driver_map[i].vendor_id)
  120.          continue;
  121.       if (driver_map[i].num_chips_ids == -1) {
  122.          driver = strdup(driver_map[i].driver);
  123.          _eglLog(_EGL_DEBUG, "pci id for %d: %04x:%04x, driver %s",
  124.                  fd, vendor_id, chip_id, driver);
  125.          goto out;
  126.       }
  127.  
  128.       for (j = 0; j < driver_map[i].num_chips_ids; j++)
  129.          if (driver_map[i].chip_ids[j] == chip_id) {
  130.             driver = strdup(driver_map[i].driver);
  131.             _eglLog(_EGL_DEBUG, "pci id for %d: %04x:%04x, driver %s",
  132.                     fd, vendor_id, chip_id, driver);
  133.             goto out;
  134.          }
  135.    }
  136.  
  137. out:
  138.    udev_device_unref(device);
  139.    udev_unref(udev);
  140.  
  141.    return driver;
  142. }
  143.  
  144. #endif /* HAVE_LIBUDEV */
  145.