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 *
dri2_udev_device_new_from_fd(struct udev * udev,int fd)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 *
dri2_get_device_name_for_fd(int fd)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 *
dri2_get_driver_for_fd(int fd)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