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
45static struct udev_device *
46dri2_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
66char *
67dri2_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
84out:
85   udev_device_unref(device);
86   udev_unref(udev);
87
88   return device_name;
89}
90
91char *
92dri2_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
137out:
138   udev_device_unref(device);
139   udev_unref(udev);
140
141   return driver;
142}
143
144#endif /* HAVE_LIBUDEV */
145