Commit | Line | Data |
---|---|---|
0650fd58 | 1 | |
1da177e4 LT |
2 | /* |
3 | * drm_sysfs.c - Modifications to drm_sysfs_class.c to support | |
4 | * extra sysfs attribute from DRM. Normal drm_sysfs_class | |
5 | * does not allow adding attributes. | |
6 | * | |
7 | * Copyright (c) 2004 Jon Smirl <jonsmirl@gmail.com> | |
8 | * Copyright (c) 2003-2004 Greg Kroah-Hartman <greg@kroah.com> | |
9 | * Copyright (c) 2003-2004 IBM Corp. | |
10 | * | |
11 | * This file is released under the GPLv2 | |
12 | * | |
13 | */ | |
14 | ||
1da177e4 LT |
15 | #include <linux/device.h> |
16 | #include <linux/kdev_t.h> | |
17 | #include <linux/err.h> | |
18 | ||
19 | #include "drm_core.h" | |
f210973b | 20 | #include "drmP.h" |
1da177e4 | 21 | |
1da177e4 LT |
22 | /* Display the version of drm_core. This doesn't work right in current design */ |
23 | static ssize_t version_show(struct class *dev, char *buf) | |
24 | { | |
25 | return sprintf(buf, "%s %d.%d.%d %s\n", CORE_NAME, CORE_MAJOR, | |
26 | CORE_MINOR, CORE_PATCHLEVEL, CORE_DATE); | |
27 | } | |
28 | ||
29 | static CLASS_ATTR(version, S_IRUGO, version_show, NULL); | |
30 | ||
31 | /** | |
32 | * drm_sysfs_create - create a struct drm_sysfs_class structure | |
33 | * @owner: pointer to the module that is to "own" this struct drm_sysfs_class | |
34 | * @name: pointer to a string for the name of this class. | |
35 | * | |
36 | * This is used to create a struct drm_sysfs_class pointer that can then be used | |
37 | * in calls to drm_sysfs_device_add(). | |
38 | * | |
39 | * Note, the pointer created here is to be destroyed when finished by making a | |
40 | * call to drm_sysfs_destroy(). | |
41 | */ | |
0650fd58 | 42 | struct class *drm_sysfs_create(struct module *owner, char *name) |
1da177e4 | 43 | { |
0650fd58 | 44 | struct class *class; |
24f73c92 | 45 | int err; |
0650fd58 GKH |
46 | |
47 | class = class_create(owner, name); | |
94f060bd AM |
48 | if (IS_ERR(class)) { |
49 | err = PTR_ERR(class); | |
24f73c92 JG |
50 | goto err_out; |
51 | } | |
52 | ||
53 | err = class_create_file(class, &class_attr_version); | |
54 | if (err) | |
55 | goto err_out_class; | |
0650fd58 | 56 | |
0650fd58 | 57 | return class; |
24f73c92 JG |
58 | |
59 | err_out_class: | |
60 | class_destroy(class); | |
61 | err_out: | |
62 | return ERR_PTR(err); | |
1da177e4 LT |
63 | } |
64 | ||
65 | /** | |
66 | * drm_sysfs_destroy - destroys a struct drm_sysfs_class structure | |
67 | * @cs: pointer to the struct drm_sysfs_class that is to be destroyed | |
68 | * | |
69 | * Note, the pointer to be destroyed must have been created with a call to | |
70 | * drm_sysfs_create(). | |
71 | */ | |
0650fd58 | 72 | void drm_sysfs_destroy(struct class *class) |
1da177e4 | 73 | { |
0650fd58 | 74 | if ((class == NULL) || (IS_ERR(class))) |
1da177e4 LT |
75 | return; |
76 | ||
0650fd58 GKH |
77 | class_remove_file(class, &class_attr_version); |
78 | class_destroy(class); | |
1da177e4 LT |
79 | } |
80 | ||
732052ed DA |
81 | static ssize_t show_dri(struct class_device *class_device, char *buf) |
82 | { | |
84b1fd10 | 83 | struct drm_device * dev = ((struct drm_head *)class_get_devdata(class_device))->dev; |
732052ed DA |
84 | if (dev->driver->dri_library_name) |
85 | return dev->driver->dri_library_name(dev, buf); | |
86 | return snprintf(buf, PAGE_SIZE, "%s\n", dev->driver->pci_driver.name); | |
87 | } | |
88 | ||
89 | static struct class_device_attribute class_device_attrs[] = { | |
90 | __ATTR(dri_library_name, S_IRUGO, show_dri, NULL), | |
91 | }; | |
92 | ||
1da177e4 LT |
93 | /** |
94 | * drm_sysfs_device_add - adds a class device to sysfs for a character driver | |
0650fd58 | 95 | * @cs: pointer to the struct class that this device should be registered to. |
1da177e4 LT |
96 | * @dev: the dev_t for the device to be added. |
97 | * @device: a pointer to a struct device that is assiociated with this class device. | |
98 | * @fmt: string for the class device's name | |
99 | * | |
100 | * A struct class_device will be created in sysfs, registered to the specified | |
101 | * class. A "dev" file will be created, showing the dev_t for the device. The | |
102 | * pointer to the struct class_device will be returned from the call. Any further | |
103 | * sysfs files that might be required can be created using this pointer. | |
0650fd58 | 104 | * Note: the struct class passed to this function must have previously been |
1da177e4 LT |
105 | * created with a call to drm_sysfs_create(). |
106 | */ | |
84b1fd10 | 107 | struct class_device *drm_sysfs_device_add(struct class *cs, struct drm_head *head) |
1da177e4 | 108 | { |
0650fd58 | 109 | struct class_device *class_dev; |
24f73c92 | 110 | int i, j, err; |
1da177e4 | 111 | |
0650fd58 GKH |
112 | class_dev = class_device_create(cs, NULL, |
113 | MKDEV(DRM_MAJOR, head->minor), | |
114 | &(head->dev->pdev)->dev, | |
115 | "card%d", head->minor); | |
94f060bd AM |
116 | if (IS_ERR(class_dev)) { |
117 | err = PTR_ERR(class_dev); | |
24f73c92 JG |
118 | goto err_out; |
119 | } | |
1da177e4 | 120 | |
0650fd58 | 121 | class_set_devdata(class_dev, head); |
1da177e4 | 122 | |
24f73c92 JG |
123 | for (i = 0; i < ARRAY_SIZE(class_device_attrs); i++) { |
124 | err = class_device_create_file(class_dev, | |
125 | &class_device_attrs[i]); | |
126 | if (err) | |
127 | goto err_out_files; | |
128 | } | |
129 | ||
0650fd58 | 130 | return class_dev; |
24f73c92 JG |
131 | |
132 | err_out_files: | |
133 | if (i > 0) | |
134 | for (j = 0; j < i; j++) | |
135 | class_device_remove_file(class_dev, | |
136 | &class_device_attrs[i]); | |
137 | class_device_unregister(class_dev); | |
138 | err_out: | |
139 | return ERR_PTR(err); | |
1da177e4 LT |
140 | } |
141 | ||
142 | /** | |
143 | * drm_sysfs_device_remove - removes a class device that was created with drm_sysfs_device_add() | |
144 | * @dev: the dev_t of the device that was previously registered. | |
145 | * | |
146 | * This call unregisters and cleans up a class device that was created with a | |
147 | * call to drm_sysfs_device_add() | |
148 | */ | |
732052ed | 149 | void drm_sysfs_device_remove(struct class_device *class_dev) |
1da177e4 | 150 | { |
732052ed DA |
151 | int i; |
152 | ||
153 | for (i = 0; i < ARRAY_SIZE(class_device_attrs); i++) | |
0650fd58 GKH |
154 | class_device_remove_file(class_dev, &class_device_attrs[i]); |
155 | class_device_unregister(class_dev); | |
1da177e4 | 156 | } |