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15#ifndef _DEBUGFS_H_
16#define _DEBUGFS_H_
17
18#include <linux/fs.h>
19#include <linux/seq_file.h>
20
21#include <linux/types.h>
22
23struct file_operations;
24
25struct debugfs_blob_wrapper {
26 void *data;
27 unsigned long size;
28};
29
30struct debugfs_reg32 {
31 char *name;
32 unsigned long offset;
33};
34
35struct debugfs_regset32 {
36 const struct debugfs_reg32 *regs;
37 int nregs;
38 void __iomem *base;
39};
40
41extern struct dentry *arch_debugfs_dir;
42
43#if defined(CONFIG_DEBUG_FS)
44
45
46extern const struct file_operations debugfs_file_operations;
47extern const struct inode_operations debugfs_link_operations;
48
49struct dentry *debugfs_lookup(const char *name, struct dentry *parent);
50
51struct dentry *debugfs_create_file(const char *name, umode_t mode,
52 struct dentry *parent, void *data,
53 const struct file_operations *fops);
54
55struct dentry *debugfs_create_dir(const char *name, struct dentry *parent);
56
57struct dentry *debugfs_create_symlink(const char *name, struct dentry *parent,
58 const char *dest);
59
60void debugfs_remove(struct dentry *dentry);
61void debugfs_remove_recursive(struct dentry *dentry);
62
63struct dentry *debugfs_rename(struct dentry *old_dir, struct dentry *old_dentry,
64 struct dentry *new_dir, const char *new_name);
65
66struct dentry *debugfs_create_u8(const char *name, umode_t mode,
67 struct dentry *parent, u8 *value);
68struct dentry *debugfs_create_u16(const char *name, umode_t mode,
69 struct dentry *parent, u16 *value);
70struct dentry *debugfs_create_u32(const char *name, umode_t mode,
71 struct dentry *parent, u32 *value);
72struct dentry *debugfs_create_u64(const char *name, umode_t mode,
73 struct dentry *parent, u64 *value);
74struct dentry *debugfs_create_ulong(const char *name, umode_t mode,
75 struct dentry *parent, unsigned long *value);
76struct dentry *debugfs_create_x8(const char *name, umode_t mode,
77 struct dentry *parent, u8 *value);
78struct dentry *debugfs_create_x16(const char *name, umode_t mode,
79 struct dentry *parent, u16 *value);
80struct dentry *debugfs_create_x32(const char *name, umode_t mode,
81 struct dentry *parent, u32 *value);
82struct dentry *debugfs_create_x64(const char *name, umode_t mode,
83 struct dentry *parent, u64 *value);
84struct dentry *debugfs_create_size_t(const char *name, umode_t mode,
85 struct dentry *parent, size_t *value);
86struct dentry *debugfs_create_atomic_t(const char *name, umode_t mode,
87 struct dentry *parent, atomic_t *value);
88struct dentry *debugfs_create_bool(const char *name, umode_t mode,
89 struct dentry *parent, u32 *value);
90
91struct dentry *debugfs_create_blob(const char *name, umode_t mode,
92 struct dentry *parent,
93 struct debugfs_blob_wrapper *blob);
94
95struct dentry *debugfs_create_regset32(const char *name, umode_t mode,
96 struct dentry *parent,
97 struct debugfs_regset32 *regset);
98
99int debugfs_print_regs32(struct seq_file *s, const struct debugfs_reg32 *regs,
100 int nregs, void __iomem *base, char *prefix);
101
102struct dentry *debugfs_create_u32_array(const char *name, umode_t mode,
103 struct dentry *parent,
104 u32 *array, u32 elements);
105
106struct dentry *debugfs_create_devm_seqfile(struct device *dev, const char *name,
107 struct dentry *parent,
108 int (*read_fn)(struct seq_file *s,
109 void *data));
110
111bool debugfs_initialized(void);
112
113ssize_t debugfs_read_file_bool(struct file *file, char __user *user_buf,
114 size_t count, loff_t *ppos);
115
116ssize_t debugfs_write_file_bool(struct file *file, const char __user *user_buf,
117 size_t count, loff_t *ppos);
118
119#else
120
121#include <linux/err.h>
122
123
124
125
126
127
128
129static inline struct dentry *debugfs_lookup(const char *name,
130 struct dentry *parent)
131{
132 return ERR_PTR(-ENODEV);
133}
134
135static inline struct dentry *debugfs_create_file(const char *name, umode_t mode,
136 struct dentry *parent, void *data,
137 const struct file_operations *fops)
138{
139 return ERR_PTR(-ENODEV);
140}
141
142static inline struct dentry *debugfs_create_dir(const char *name,
143 struct dentry *parent)
144{
145 return ERR_PTR(-ENODEV);
146}
147
148static inline struct dentry *debugfs_create_symlink(const char *name,
149 struct dentry *parent,
150 const char *dest)
151{
152 return ERR_PTR(-ENODEV);
153}
154
155static inline void debugfs_remove(struct dentry *dentry)
156{ }
157
158static inline void debugfs_remove_recursive(struct dentry *dentry)
159{ }
160
161static inline struct dentry *debugfs_rename(struct dentry *old_dir, struct dentry *old_dentry,
162 struct dentry *new_dir, char *new_name)
163{
164 return ERR_PTR(-ENODEV);
165}
166
167static inline struct dentry *debugfs_create_u8(const char *name, umode_t mode,
168 struct dentry *parent,
169 u8 *value)
170{
171 return ERR_PTR(-ENODEV);
172}
173
174static inline struct dentry *debugfs_create_u16(const char *name, umode_t mode,
175 struct dentry *parent,
176 u16 *value)
177{
178 return ERR_PTR(-ENODEV);
179}
180
181static inline struct dentry *debugfs_create_u32(const char *name, umode_t mode,
182 struct dentry *parent,
183 u32 *value)
184{
185 return ERR_PTR(-ENODEV);
186}
187
188static inline struct dentry *debugfs_create_u64(const char *name, umode_t mode,
189 struct dentry *parent,
190 u64 *value)
191{
192 return ERR_PTR(-ENODEV);
193}
194
195static inline struct dentry *debugfs_create_x8(const char *name, umode_t mode,
196 struct dentry *parent,
197 u8 *value)
198{
199 return ERR_PTR(-ENODEV);
200}
201
202static inline struct dentry *debugfs_create_x16(const char *name, umode_t mode,
203 struct dentry *parent,
204 u16 *value)
205{
206 return ERR_PTR(-ENODEV);
207}
208
209static inline struct dentry *debugfs_create_x32(const char *name, umode_t mode,
210 struct dentry *parent,
211 u32 *value)
212{
213 return ERR_PTR(-ENODEV);
214}
215
216static inline struct dentry *debugfs_create_size_t(const char *name, umode_t mode,
217 struct dentry *parent,
218 size_t *value)
219{
220 return ERR_PTR(-ENODEV);
221}
222
223static inline struct dentry *debugfs_create_bool(const char *name, umode_t mode,
224 struct dentry *parent,
225 u32 *value)
226{
227 return ERR_PTR(-ENODEV);
228}
229
230static inline struct dentry *debugfs_create_blob(const char *name, umode_t mode,
231 struct dentry *parent,
232 struct debugfs_blob_wrapper *blob)
233{
234 return ERR_PTR(-ENODEV);
235}
236
237static inline struct dentry *debugfs_create_regset32(const char *name,
238 umode_t mode, struct dentry *parent,
239 struct debugfs_regset32 *regset)
240{
241 return ERR_PTR(-ENODEV);
242}
243
244static inline bool debugfs_initialized(void)
245{
246 return false;
247}
248
249static inline struct dentry *debugfs_create_u32_array(const char *name, umode_t mode,
250 struct dentry *parent,
251 u32 *array, u32 elements)
252{
253 return ERR_PTR(-ENODEV);
254}
255
256static inline struct dentry *debugfs_create_devm_seqfile(struct device *dev,
257 const char *name,
258 struct dentry *parent,
259 int (*read_fn)(struct seq_file *s,
260 void *data))
261{
262 return ERR_PTR(-ENODEV);
263}
264
265static inline ssize_t debugfs_read_file_bool(struct file *file,
266 char __user *user_buf,
267 size_t count, loff_t *ppos)
268{
269 return -ENODEV;
270}
271
272static inline ssize_t debugfs_write_file_bool(struct file *file,
273 const char __user *user_buf,
274 size_t count, loff_t *ppos)
275{
276 return -ENODEV;
277}
278
279#endif
280
281#endif
282
