3 * /proc support for DRM
5 * \author Rickard E. (Rik) Faith <faith@valinux.com>
6 * \author Gareth Hughes <gareth@valinux.com>
8 * \par Acknowledgements:
9 * Matthew J Sottek <matthew.j.sottek@intel.com> sent in a patch to fix
10 * the problem with the proc files not outputting all their information.
14 * Created: Mon Jan 11 09:48:47 1999 by faith@valinux.com
16 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
17 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
18 * All Rights Reserved.
20 * Permission is hereby granted, free of charge, to any person obtaining a
21 * copy of this software and associated documentation files (the "Software"),
22 * to deal in the Software without restriction, including without limitation
23 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
24 * and/or sell copies of the Software, and to permit persons to whom the
25 * Software is furnished to do so, subject to the following conditions:
27 * The above copyright notice and this permission notice (including the next
28 * paragraph) shall be included in all copies or substantial portions of the
31 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
32 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
33 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
34 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
35 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
36 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
37 * OTHER DEALINGS IN THE SOFTWARE.
40 #include <linux/seq_file.h>
41 #include <linux/slab.h>
42 #include <linux/export.h>
45 /***************************************************
46 * Initialization, etc.
47 **************************************************/
52 static const struct drm_info_list drm_proc_list
[] = {
53 {"name", drm_name_info
, 0},
54 {"vm", drm_vm_info
, 0},
55 {"clients", drm_clients_info
, 0},
56 {"bufs", drm_bufs_info
, 0},
57 {"gem_names", drm_gem_name_info
, DRIVER_GEM
},
59 {"vma", drm_vma_info
, 0},
62 #define DRM_PROC_ENTRIES ARRAY_SIZE(drm_proc_list)
64 static int drm_proc_open(struct inode
*inode
, struct file
*file
)
66 struct drm_info_node
* node
= PDE_DATA(inode
);
68 return single_open(file
, node
->info_ent
->show
, node
);
71 static const struct file_operations drm_proc_fops
= {
73 .open
= drm_proc_open
,
76 .release
= single_release
,
81 * Initialize a given set of proc files for a device
83 * \param files The array of files to create
84 * \param count The number of files given
85 * \param root DRI proc dir entry.
86 * \param minor device minor number
87 * \return Zero on success, non-zero on failure
89 * Create a given set of proc files represented by an array of
90 * gdm_proc_lists in the given root directory.
92 static int drm_proc_create_files(const struct drm_info_list
*files
, int count
,
93 struct proc_dir_entry
*root
, struct drm_minor
*minor
)
95 struct drm_device
*dev
= minor
->dev
;
96 struct proc_dir_entry
*ent
;
97 struct drm_info_node
*tmp
;
100 for (i
= 0; i
< count
; i
++) {
101 u32 features
= files
[i
].driver_features
;
104 (dev
->driver
->driver_features
& features
) != features
)
107 tmp
= kmalloc(sizeof(struct drm_info_node
), GFP_KERNEL
);
112 tmp
->info_ent
= &files
[i
];
113 list_add(&tmp
->list
, &minor
->proc_nodes
.list
);
115 ent
= proc_create_data(files
[i
].name
, S_IRUGO
, root
,
116 &drm_proc_fops
, tmp
);
118 DRM_ERROR("Cannot create /proc/dri/%u/%s\n",
119 minor
->index
, files
[i
].name
);
120 list_del(&tmp
->list
);
129 * Initialize the DRI proc filesystem for a device
131 * \param dev DRM device
132 * \param root DRI proc dir entry.
133 * \param dev_root resulting DRI device proc dir entry.
134 * \return root entry pointer on success, or NULL on failure.
136 * Create the DRI proc root entry "/proc/dri", the device proc root entry
137 * "/proc/dri/%minor%/", and each entry in proc_list as
138 * "/proc/dri/%minor%/%name%".
140 int drm_proc_init(struct drm_minor
*minor
, struct proc_dir_entry
*root
)
145 INIT_LIST_HEAD(&minor
->proc_nodes
.list
);
146 sprintf(name
, "%u", minor
->index
);
147 minor
->proc_root
= proc_mkdir(name
, root
);
148 if (!minor
->proc_root
) {
149 DRM_ERROR("Cannot create /proc/dri/%s\n", name
);
153 ret
= drm_proc_create_files(drm_proc_list
, DRM_PROC_ENTRIES
,
154 minor
->proc_root
, minor
);
156 remove_proc_subtree(name
, root
);
157 minor
->proc_root
= NULL
;
158 DRM_ERROR("Failed to create core drm proc files\n");
165 static int drm_proc_remove_files(const struct drm_info_list
*files
, int count
,
166 struct drm_minor
*minor
)
168 struct list_head
*pos
, *q
;
169 struct drm_info_node
*tmp
;
172 for (i
= 0; i
< count
; i
++) {
173 list_for_each_safe(pos
, q
, &minor
->proc_nodes
.list
) {
174 tmp
= list_entry(pos
, struct drm_info_node
, list
);
175 if (tmp
->info_ent
== &files
[i
]) {
176 remove_proc_entry(files
[i
].name
,
187 * Cleanup the proc filesystem resources.
189 * \param minor device minor number.
190 * \param root DRI proc dir entry.
191 * \param dev_root DRI device proc dir entry.
192 * \return always zero.
194 * Remove all proc entries created by proc_init().
196 int drm_proc_cleanup(struct drm_minor
*minor
, struct proc_dir_entry
*root
)
200 if (!root
|| !minor
->proc_root
)
203 drm_proc_remove_files(drm_proc_list
, DRM_PROC_ENTRIES
, minor
);
205 sprintf(name
, "%d", minor
->index
);
206 remove_proc_subtree(name
, root
);