1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
|
/**
* \file drm_proc.c
* /proc support for DRM
*
* \author Rickard E. (Rik) Faith <faith@valinux.com>
* \author Gareth Hughes <gareth@valinux.com>
*
* \par Acknowledgements:
* Matthew J Sottek <matthew.j.sottek@intel.com> sent in a patch to fix
* the problem with the proc files not outputting all their information.
*/
/*
* Created: Mon Jan 11 09:48:47 1999 by faith@valinux.com
*
* Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
* Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
#include <linux/seq_file.h>
#include <linux/slab.h>
#include <linux/export.h>
#include <drm/drmP.h>
/***************************************************
* Initialization, etc.
**************************************************/
/**
* Proc file list.
*/
static struct drm_info_list drm_proc_list[] = {
{"name", drm_name_info, 0},
{"vm", drm_vm_info, 0},
{"clients", drm_clients_info, 0},
{"bufs", drm_bufs_info, 0},
{"gem_names", drm_gem_name_info, DRIVER_GEM},
#if DRM_DEBUG_CODE
{"vma", drm_vma_info, 0},
#endif
};
#define DRM_PROC_ENTRIES ARRAY_SIZE(drm_proc_list)
static int drm_proc_open(struct inode *inode, struct file *file)
{
struct drm_info_node* node = PDE_DATA(inode);
return single_open(file, node->info_ent->show, node);
}
static const struct file_operations drm_proc_fops = {
.owner = THIS_MODULE,
.open = drm_proc_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
/**
* Initialize a given set of proc files for a device
*
* \param files The array of files to create
* \param count The number of files given
* \param root DRI proc dir entry.
* \param minor device minor number
* \return Zero on success, non-zero on failure
*
* Create a given set of proc files represented by an array of
* gdm_proc_lists in the given root directory.
*/
static int drm_proc_create_files(struct drm_info_list *files, int count,
struct proc_dir_entry *root, struct drm_minor *minor)
{
struct drm_device *dev = minor->dev;
struct proc_dir_entry *ent;
struct drm_info_node *tmp;
int i, ret;
for (i = 0; i < count; i++) {
u32 features = files[i].driver_features;
if (features != 0 &&
(dev->driver->driver_features & features) != features)
continue;
tmp = kmalloc(sizeof(struct drm_info_node), GFP_KERNEL);
if (tmp == NULL) {
ret = -1;
goto fail;
}
tmp->minor = minor;
tmp->info_ent = &files[i];
list_add(&tmp->list, &minor->proc_nodes.list);
ent = proc_create_data(files[i].name, S_IRUGO, root,
&drm_proc_fops, tmp);
if (!ent) {
DRM_ERROR("Cannot create /proc/dri/%s/%s\n",
root->name, files[i].name);
list_del(&tmp->list);
kfree(tmp);
ret = -1;
goto fail;
}
}
return 0;
fail:
for (i = 0; i < count; i++)
remove_proc_entry(drm_proc_list[i].name, minor->proc_root);
return ret;
}
/**
* Initialize the DRI proc filesystem for a device
*
* \param dev DRM device
* \param minor device minor number
* \param root DRI proc dir entry.
* \param dev_root resulting DRI device proc dir entry.
* \return root entry pointer on success, or NULL on failure.
*
* Create the DRI proc root entry "/proc/dri", the device proc root entry
* "/proc/dri/%minor%/", and each entry in proc_list as
* "/proc/dri/%minor%/%name%".
*/
int drm_proc_init(struct drm_minor *minor, int minor_id,
struct proc_dir_entry *root)
{
char name[64];
int ret;
INIT_LIST_HEAD(&minor->proc_nodes.list);
sprintf(name, "%d", minor_id);
minor->proc_root = proc_mkdir(name, root);
if (!minor->proc_root) {
DRM_ERROR("Cannot create /proc/dri/%s\n", name);
return -1;
}
ret = drm_proc_create_files(drm_proc_list, DRM_PROC_ENTRIES,
minor->proc_root, minor);
if (ret) {
remove_proc_entry(name, root);
minor->proc_root = NULL;
DRM_ERROR("Failed to create core drm proc files\n");
return ret;
}
return 0;
}
static int drm_proc_remove_files(struct drm_info_list *files, int count,
struct drm_minor *minor)
{
struct list_head *pos, *q;
struct drm_info_node *tmp;
int i;
for (i = 0; i < count; i++) {
list_for_each_safe(pos, q, &minor->proc_nodes.list) {
tmp = list_entry(pos, struct drm_info_node, list);
if (tmp->info_ent == &files[i]) {
remove_proc_entry(files[i].name,
minor->proc_root);
list_del(pos);
kfree(tmp);
}
}
}
return 0;
}
/**
* Cleanup the proc filesystem resources.
*
* \param minor device minor number.
* \param root DRI proc dir entry.
* \param dev_root DRI device proc dir entry.
* \return always zero.
*
* Remove all proc entries created by proc_init().
*/
int drm_proc_cleanup(struct drm_minor *minor, struct proc_dir_entry *root)
{
char name[64];
if (!root || !minor->proc_root)
return 0;
drm_proc_remove_files(drm_proc_list, DRM_PROC_ENTRIES, minor);
sprintf(name, "%d", minor->index);
remove_proc_entry(name, root);
return 0;
}
|
