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1da177e4 LT |
1 | /* |
2 | * debug.c - ACPI debug interface to userspace. | |
3 | */ | |
4 | ||
5 | #include <linux/proc_fs.h> | |
6 | #include <linux/init.h> | |
7 | #include <linux/module.h> | |
8 | #include <linux/kernel.h> | |
9 | #include <linux/moduleparam.h> | |
10 | #include <asm/uaccess.h> | |
11 | #include <acpi/acpi_drivers.h> | |
12 | #include <acpi/acglobal.h> | |
13 | ||
14 | #define _COMPONENT ACPI_SYSTEM_COMPONENT | |
f52fd66d | 15 | ACPI_MODULE_NAME("debug"); |
219c3c8e | 16 | |
1da177e4 LT |
17 | #ifdef MODULE_PARAM_PREFIX |
18 | #undef MODULE_PARAM_PREFIX | |
19 | #endif | |
219c3c8e | 20 | #define MODULE_PARAM_PREFIX "acpi." |
1da177e4 LT |
21 | |
22 | struct acpi_dlayer { | |
23 | const char *name; | |
24 | unsigned long value; | |
25 | }; | |
26 | struct acpi_dlevel { | |
27 | const char *name; | |
28 | unsigned long value; | |
29 | }; | |
30 | #define ACPI_DEBUG_INIT(v) { .name = #v, .value = v } | |
31 | ||
4be44fcd | 32 | static const struct acpi_dlayer acpi_debug_layers[] = { |
1da177e4 LT |
33 | ACPI_DEBUG_INIT(ACPI_UTILITIES), |
34 | ACPI_DEBUG_INIT(ACPI_HARDWARE), | |
35 | ACPI_DEBUG_INIT(ACPI_EVENTS), | |
36 | ACPI_DEBUG_INIT(ACPI_TABLES), | |
37 | ACPI_DEBUG_INIT(ACPI_NAMESPACE), | |
38 | ACPI_DEBUG_INIT(ACPI_PARSER), | |
39 | ACPI_DEBUG_INIT(ACPI_DISPATCHER), | |
40 | ACPI_DEBUG_INIT(ACPI_EXECUTER), | |
41 | ACPI_DEBUG_INIT(ACPI_RESOURCES), | |
42 | ACPI_DEBUG_INIT(ACPI_CA_DEBUGGER), | |
43 | ACPI_DEBUG_INIT(ACPI_OS_SERVICES), | |
44 | ACPI_DEBUG_INIT(ACPI_CA_DISASSEMBLER), | |
45 | ACPI_DEBUG_INIT(ACPI_COMPILER), | |
46 | ACPI_DEBUG_INIT(ACPI_TOOLS), | |
47 | }; | |
48 | ||
4be44fcd | 49 | static const struct acpi_dlevel acpi_debug_levels[] = { |
1da177e4 LT |
50 | ACPI_DEBUG_INIT(ACPI_LV_ERROR), |
51 | ACPI_DEBUG_INIT(ACPI_LV_WARN), | |
52 | ACPI_DEBUG_INIT(ACPI_LV_INIT), | |
53 | ACPI_DEBUG_INIT(ACPI_LV_DEBUG_OBJECT), | |
54 | ACPI_DEBUG_INIT(ACPI_LV_INFO), | |
55 | ||
56 | ACPI_DEBUG_INIT(ACPI_LV_INIT_NAMES), | |
57 | ACPI_DEBUG_INIT(ACPI_LV_PARSE), | |
58 | ACPI_DEBUG_INIT(ACPI_LV_LOAD), | |
59 | ACPI_DEBUG_INIT(ACPI_LV_DISPATCH), | |
60 | ACPI_DEBUG_INIT(ACPI_LV_EXEC), | |
61 | ACPI_DEBUG_INIT(ACPI_LV_NAMES), | |
62 | ACPI_DEBUG_INIT(ACPI_LV_OPREGION), | |
63 | ACPI_DEBUG_INIT(ACPI_LV_BFIELD), | |
64 | ACPI_DEBUG_INIT(ACPI_LV_TABLES), | |
65 | ACPI_DEBUG_INIT(ACPI_LV_VALUES), | |
66 | ACPI_DEBUG_INIT(ACPI_LV_OBJECTS), | |
67 | ACPI_DEBUG_INIT(ACPI_LV_RESOURCES), | |
68 | ACPI_DEBUG_INIT(ACPI_LV_USER_REQUESTS), | |
69 | ACPI_DEBUG_INIT(ACPI_LV_PACKAGE), | |
70 | ||
71 | ACPI_DEBUG_INIT(ACPI_LV_ALLOCATIONS), | |
72 | ACPI_DEBUG_INIT(ACPI_LV_FUNCTIONS), | |
73 | ACPI_DEBUG_INIT(ACPI_LV_OPTIMIZATIONS), | |
74 | ||
75 | ACPI_DEBUG_INIT(ACPI_LV_MUTEX), | |
76 | ACPI_DEBUG_INIT(ACPI_LV_THREADS), | |
77 | ACPI_DEBUG_INIT(ACPI_LV_IO), | |
78 | ACPI_DEBUG_INIT(ACPI_LV_INTERRUPTS), | |
79 | ||
80 | ACPI_DEBUG_INIT(ACPI_LV_AML_DISASSEMBLE), | |
81 | ACPI_DEBUG_INIT(ACPI_LV_VERBOSE_INFO), | |
82 | ACPI_DEBUG_INIT(ACPI_LV_FULL_TABLES), | |
4be44fcd | 83 | ACPI_DEBUG_INIT(ACPI_LV_EVENTS), |
1da177e4 LT |
84 | }; |
85 | ||
219c3c8e ZR |
86 | /* -------------------------------------------------------------------------- |
87 | FS Interface (/sys) | |
88 | -------------------------------------------------------------------------- */ | |
89 | static int param_get_debug_layer(char *buffer, struct kernel_param *kp) { | |
90 | int result = 0; | |
91 | int i; | |
92 | ||
93 | result = sprintf(buffer, "%-25s\tHex SET\n", "Description"); | |
94 | ||
95 | for(i = 0; i <ARRAY_SIZE(acpi_debug_layers); i++) { | |
96 | result += sprintf(buffer+result, "%-25s\t0x%08lX [%c]\n", | |
97 | acpi_debug_layers[i].name, | |
98 | acpi_debug_layers[i].value, | |
99 | (acpi_dbg_layer & acpi_debug_layers[i].value) ? '*' : ' '); | |
100 | } | |
101 | result += sprintf(buffer+result, "%-25s\t0x%08X [%c]\n", "ACPI_ALL_DRIVERS", | |
102 | ACPI_ALL_DRIVERS, | |
103 | (acpi_dbg_layer & ACPI_ALL_DRIVERS) == | |
104 | ACPI_ALL_DRIVERS ? '*' : (acpi_dbg_layer & | |
105 | ACPI_ALL_DRIVERS) == 0 ? ' ' : '-'); | |
106 | result += sprintf(buffer+result, "--\ndebug_layer = 0x%08X ( * = enabled)\n", acpi_dbg_layer); | |
107 | ||
108 | return result; | |
109 | } | |
110 | ||
111 | static int param_get_debug_level(char *buffer, struct kernel_param *kp) { | |
112 | int result = 0; | |
113 | int i; | |
114 | ||
115 | result = sprintf(buffer, "%-25s\tHex SET\n", "Description"); | |
116 | ||
117 | for (i = 0; i < ARRAY_SIZE(acpi_debug_levels); i++) { | |
118 | result += sprintf(buffer+result, "%-25s\t0x%08lX [%c]\n", | |
119 | acpi_debug_levels[i].name, | |
120 | acpi_debug_levels[i].value, | |
121 | (acpi_dbg_level & acpi_debug_levels[i]. | |
122 | value) ? '*' : ' '); | |
123 | } | |
124 | result += sprintf(buffer+result, "--\ndebug_level = 0x%08X (* = enabled)\n", | |
125 | acpi_dbg_level); | |
126 | ||
127 | return result; | |
128 | } | |
129 | ||
130 | module_param_call(debug_layer, param_set_uint, param_get_debug_layer, &acpi_dbg_layer, 0644); | |
131 | module_param_call(debug_level, param_set_uint, param_get_debug_level, &acpi_dbg_level, 0644); | |
132 | ||
133 | /* -------------------------------------------------------------------------- | |
134 | FS Interface (/proc) | |
135 | -------------------------------------------------------------------------- */ | |
136 | #ifdef CONFIG_ACPI_PROCFS | |
137 | #define ACPI_SYSTEM_FILE_DEBUG_LAYER "debug_layer" | |
138 | #define ACPI_SYSTEM_FILE_DEBUG_LEVEL "debug_level" | |
139 | ||
1da177e4 | 140 | static int |
4be44fcd LB |
141 | acpi_system_read_debug(char *page, |
142 | char **start, off_t off, int count, int *eof, void *data) | |
1da177e4 | 143 | { |
4be44fcd LB |
144 | char *p = page; |
145 | int size = 0; | |
146 | unsigned int i; | |
1da177e4 LT |
147 | |
148 | if (off != 0) | |
149 | goto end; | |
150 | ||
151 | p += sprintf(p, "%-25s\tHex SET\n", "Description"); | |
152 | ||
4be44fcd | 153 | switch ((unsigned long)data) { |
1da177e4 LT |
154 | case 0: |
155 | for (i = 0; i < ARRAY_SIZE(acpi_debug_layers); i++) { | |
156 | p += sprintf(p, "%-25s\t0x%08lX [%c]\n", | |
4be44fcd LB |
157 | acpi_debug_layers[i].name, |
158 | acpi_debug_layers[i].value, | |
159 | (acpi_dbg_layer & acpi_debug_layers[i]. | |
160 | value) ? '*' : ' '); | |
1da177e4 LT |
161 | } |
162 | p += sprintf(p, "%-25s\t0x%08X [%c]\n", "ACPI_ALL_DRIVERS", | |
4be44fcd LB |
163 | ACPI_ALL_DRIVERS, |
164 | (acpi_dbg_layer & ACPI_ALL_DRIVERS) == | |
165 | ACPI_ALL_DRIVERS ? '*' : (acpi_dbg_layer & | |
166 | ACPI_ALL_DRIVERS) == | |
167 | 0 ? ' ' : '-'); | |
1da177e4 | 168 | p += sprintf(p, |
4be44fcd LB |
169 | "--\ndebug_layer = 0x%08X (* = enabled, - = partial)\n", |
170 | acpi_dbg_layer); | |
1da177e4 LT |
171 | break; |
172 | case 1: | |
173 | for (i = 0; i < ARRAY_SIZE(acpi_debug_levels); i++) { | |
174 | p += sprintf(p, "%-25s\t0x%08lX [%c]\n", | |
4be44fcd LB |
175 | acpi_debug_levels[i].name, |
176 | acpi_debug_levels[i].value, | |
177 | (acpi_dbg_level & acpi_debug_levels[i]. | |
178 | value) ? '*' : ' '); | |
1da177e4 LT |
179 | } |
180 | p += sprintf(p, "--\ndebug_level = 0x%08X (* = enabled)\n", | |
4be44fcd | 181 | acpi_dbg_level); |
1da177e4 LT |
182 | break; |
183 | default: | |
184 | p += sprintf(p, "Invalid debug option\n"); | |
185 | break; | |
186 | } | |
4be44fcd LB |
187 | |
188 | end: | |
1da177e4 | 189 | size = (p - page); |
4be44fcd LB |
190 | if (size <= off + count) |
191 | *eof = 1; | |
1da177e4 LT |
192 | *start = page + off; |
193 | size -= off; | |
4be44fcd LB |
194 | if (size > count) |
195 | size = count; | |
196 | if (size < 0) | |
197 | size = 0; | |
1da177e4 LT |
198 | |
199 | return size; | |
200 | } | |
201 | ||
1da177e4 | 202 | static int |
4be44fcd LB |
203 | acpi_system_write_debug(struct file *file, |
204 | const char __user * buffer, | |
205 | unsigned long count, void *data) | |
1da177e4 | 206 | { |
4be44fcd | 207 | char debug_string[12] = { '\0' }; |
1da177e4 | 208 | |
1da177e4 LT |
209 | |
210 | if (count > sizeof(debug_string) - 1) | |
d550d98d | 211 | return -EINVAL; |
1da177e4 LT |
212 | |
213 | if (copy_from_user(debug_string, buffer, count)) | |
d550d98d | 214 | return -EFAULT; |
1da177e4 LT |
215 | |
216 | debug_string[count] = '\0'; | |
217 | ||
4be44fcd | 218 | switch ((unsigned long)data) { |
1da177e4 LT |
219 | case 0: |
220 | acpi_dbg_layer = simple_strtoul(debug_string, NULL, 0); | |
221 | break; | |
222 | case 1: | |
223 | acpi_dbg_level = simple_strtoul(debug_string, NULL, 0); | |
224 | break; | |
225 | default: | |
d550d98d | 226 | return -EINVAL; |
1da177e4 LT |
227 | } |
228 | ||
d550d98d | 229 | return count; |
1da177e4 LT |
230 | } |
231 | ||
232 | static int __init acpi_debug_init(void) | |
233 | { | |
4be44fcd | 234 | struct proc_dir_entry *entry; |
1da177e4 | 235 | int error = 0; |
4be44fcd | 236 | char *name; |
1da177e4 | 237 | |
1da177e4 LT |
238 | |
239 | if (acpi_disabled) | |
d550d98d | 240 | return 0; |
1da177e4 LT |
241 | |
242 | /* 'debug_layer' [R/W] */ | |
243 | name = ACPI_SYSTEM_FILE_DEBUG_LAYER; | |
4be44fcd LB |
244 | entry = |
245 | create_proc_read_entry(name, S_IFREG | S_IRUGO | S_IWUSR, | |
246 | acpi_root_dir, acpi_system_read_debug, | |
247 | (void *)0); | |
1da177e4 LT |
248 | if (entry) |
249 | entry->write_proc = acpi_system_write_debug; | |
250 | else | |
251 | goto Error; | |
252 | ||
253 | /* 'debug_level' [R/W] */ | |
254 | name = ACPI_SYSTEM_FILE_DEBUG_LEVEL; | |
4be44fcd LB |
255 | entry = |
256 | create_proc_read_entry(name, S_IFREG | S_IRUGO | S_IWUSR, | |
257 | acpi_root_dir, acpi_system_read_debug, | |
258 | (void *)1); | |
259 | if (entry) | |
1da177e4 LT |
260 | entry->write_proc = acpi_system_write_debug; |
261 | else | |
262 | goto Error; | |
263 | ||
4be44fcd | 264 | Done: |
d550d98d | 265 | return error; |
1da177e4 | 266 | |
4be44fcd | 267 | Error: |
1da177e4 LT |
268 | remove_proc_entry(ACPI_SYSTEM_FILE_DEBUG_LEVEL, acpi_root_dir); |
269 | remove_proc_entry(ACPI_SYSTEM_FILE_DEBUG_LAYER, acpi_root_dir); | |
a6fc6720 | 270 | error = -ENODEV; |
1da177e4 LT |
271 | goto Done; |
272 | } | |
273 | ||
274 | subsys_initcall(acpi_debug_init); | |
219c3c8e | 275 | #endif |