Commit | Line | Data |
---|---|---|
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_INIT), |
51 | ACPI_DEBUG_INIT(ACPI_LV_DEBUG_OBJECT), | |
52 | ACPI_DEBUG_INIT(ACPI_LV_INFO), | |
53 | ||
54 | ACPI_DEBUG_INIT(ACPI_LV_INIT_NAMES), | |
55 | ACPI_DEBUG_INIT(ACPI_LV_PARSE), | |
56 | ACPI_DEBUG_INIT(ACPI_LV_LOAD), | |
57 | ACPI_DEBUG_INIT(ACPI_LV_DISPATCH), | |
58 | ACPI_DEBUG_INIT(ACPI_LV_EXEC), | |
59 | ACPI_DEBUG_INIT(ACPI_LV_NAMES), | |
60 | ACPI_DEBUG_INIT(ACPI_LV_OPREGION), | |
61 | ACPI_DEBUG_INIT(ACPI_LV_BFIELD), | |
62 | ACPI_DEBUG_INIT(ACPI_LV_TABLES), | |
63 | ACPI_DEBUG_INIT(ACPI_LV_VALUES), | |
64 | ACPI_DEBUG_INIT(ACPI_LV_OBJECTS), | |
65 | ACPI_DEBUG_INIT(ACPI_LV_RESOURCES), | |
66 | ACPI_DEBUG_INIT(ACPI_LV_USER_REQUESTS), | |
67 | ACPI_DEBUG_INIT(ACPI_LV_PACKAGE), | |
68 | ||
69 | ACPI_DEBUG_INIT(ACPI_LV_ALLOCATIONS), | |
70 | ACPI_DEBUG_INIT(ACPI_LV_FUNCTIONS), | |
71 | ACPI_DEBUG_INIT(ACPI_LV_OPTIMIZATIONS), | |
72 | ||
73 | ACPI_DEBUG_INIT(ACPI_LV_MUTEX), | |
74 | ACPI_DEBUG_INIT(ACPI_LV_THREADS), | |
75 | ACPI_DEBUG_INIT(ACPI_LV_IO), | |
76 | ACPI_DEBUG_INIT(ACPI_LV_INTERRUPTS), | |
77 | ||
78 | ACPI_DEBUG_INIT(ACPI_LV_AML_DISASSEMBLE), | |
79 | ACPI_DEBUG_INIT(ACPI_LV_VERBOSE_INFO), | |
80 | ACPI_DEBUG_INIT(ACPI_LV_FULL_TABLES), | |
4be44fcd | 81 | ACPI_DEBUG_INIT(ACPI_LV_EVENTS), |
1da177e4 LT |
82 | }; |
83 | ||
219c3c8e ZR |
84 | /* -------------------------------------------------------------------------- |
85 | FS Interface (/sys) | |
86 | -------------------------------------------------------------------------- */ | |
87 | static int param_get_debug_layer(char *buffer, struct kernel_param *kp) { | |
88 | int result = 0; | |
89 | int i; | |
90 | ||
91 | result = sprintf(buffer, "%-25s\tHex SET\n", "Description"); | |
92 | ||
93 | for(i = 0; i <ARRAY_SIZE(acpi_debug_layers); i++) { | |
94 | result += sprintf(buffer+result, "%-25s\t0x%08lX [%c]\n", | |
95 | acpi_debug_layers[i].name, | |
96 | acpi_debug_layers[i].value, | |
97 | (acpi_dbg_layer & acpi_debug_layers[i].value) ? '*' : ' '); | |
98 | } | |
99 | result += sprintf(buffer+result, "%-25s\t0x%08X [%c]\n", "ACPI_ALL_DRIVERS", | |
100 | ACPI_ALL_DRIVERS, | |
101 | (acpi_dbg_layer & ACPI_ALL_DRIVERS) == | |
102 | ACPI_ALL_DRIVERS ? '*' : (acpi_dbg_layer & | |
103 | ACPI_ALL_DRIVERS) == 0 ? ' ' : '-'); | |
104 | result += sprintf(buffer+result, "--\ndebug_layer = 0x%08X ( * = enabled)\n", acpi_dbg_layer); | |
105 | ||
106 | return result; | |
107 | } | |
108 | ||
109 | static int param_get_debug_level(char *buffer, struct kernel_param *kp) { | |
110 | int result = 0; | |
111 | int i; | |
112 | ||
113 | result = sprintf(buffer, "%-25s\tHex SET\n", "Description"); | |
114 | ||
115 | for (i = 0; i < ARRAY_SIZE(acpi_debug_levels); i++) { | |
116 | result += sprintf(buffer+result, "%-25s\t0x%08lX [%c]\n", | |
117 | acpi_debug_levels[i].name, | |
118 | acpi_debug_levels[i].value, | |
119 | (acpi_dbg_level & acpi_debug_levels[i]. | |
120 | value) ? '*' : ' '); | |
121 | } | |
122 | result += sprintf(buffer+result, "--\ndebug_level = 0x%08X (* = enabled)\n", | |
123 | acpi_dbg_level); | |
124 | ||
125 | return result; | |
126 | } | |
127 | ||
128 | module_param_call(debug_layer, param_set_uint, param_get_debug_layer, &acpi_dbg_layer, 0644); | |
129 | module_param_call(debug_level, param_set_uint, param_get_debug_level, &acpi_dbg_level, 0644); | |
130 | ||
4169c45f ZR |
131 | static char trace_method_name[6]; |
132 | module_param_string(trace_method_name, trace_method_name, 6, 0644); | |
133 | static unsigned int trace_debug_layer; | |
134 | module_param(trace_debug_layer, uint, 0644); | |
135 | static unsigned int trace_debug_level; | |
136 | module_param(trace_debug_level, uint, 0644); | |
137 | ||
138 | static int param_set_trace_state(const char *val, struct kernel_param *kp) | |
139 | { | |
140 | int result = 0; | |
141 | ||
142 | if (!strncmp(val, "enable", strlen("enable") - 1)) { | |
143 | result = acpi_debug_trace(trace_method_name, trace_debug_level, | |
144 | trace_debug_layer, 0); | |
145 | if (result) | |
146 | result = -EBUSY; | |
147 | goto exit; | |
148 | } | |
149 | ||
150 | if (!strncmp(val, "disable", strlen("disable") - 1)) { | |
151 | int name = 0; | |
152 | result = acpi_debug_trace((char *)&name, trace_debug_level, | |
153 | trace_debug_layer, 0); | |
154 | if (result) | |
155 | result = -EBUSY; | |
156 | goto exit; | |
157 | } | |
158 | ||
159 | if (!strncmp(val, "1", 1)) { | |
160 | result = acpi_debug_trace(trace_method_name, trace_debug_level, | |
161 | trace_debug_layer, 1); | |
162 | if (result) | |
163 | result = -EBUSY; | |
164 | goto exit; | |
165 | } | |
166 | ||
167 | result = -EINVAL; | |
168 | exit: | |
169 | return result; | |
170 | } | |
171 | ||
172 | static int param_get_trace_state(char *buffer, struct kernel_param *kp) | |
173 | { | |
174 | if (!acpi_gbl_trace_method_name) | |
175 | return sprintf(buffer, "disable"); | |
176 | else { | |
177 | if (acpi_gbl_trace_flags & 1) | |
178 | return sprintf(buffer, "1"); | |
179 | else | |
180 | return sprintf(buffer, "enable"); | |
181 | } | |
182 | return 0; | |
183 | } | |
184 | ||
185 | module_param_call(trace_state, param_set_trace_state, param_get_trace_state, | |
186 | NULL, 0644); | |
187 | ||
219c3c8e ZR |
188 | /* -------------------------------------------------------------------------- |
189 | FS Interface (/proc) | |
190 | -------------------------------------------------------------------------- */ | |
191 | #ifdef CONFIG_ACPI_PROCFS | |
192 | #define ACPI_SYSTEM_FILE_DEBUG_LAYER "debug_layer" | |
193 | #define ACPI_SYSTEM_FILE_DEBUG_LEVEL "debug_level" | |
194 | ||
1da177e4 | 195 | static int |
4be44fcd LB |
196 | acpi_system_read_debug(char *page, |
197 | char **start, off_t off, int count, int *eof, void *data) | |
1da177e4 | 198 | { |
4be44fcd LB |
199 | char *p = page; |
200 | int size = 0; | |
201 | unsigned int i; | |
1da177e4 LT |
202 | |
203 | if (off != 0) | |
204 | goto end; | |
205 | ||
206 | p += sprintf(p, "%-25s\tHex SET\n", "Description"); | |
207 | ||
4be44fcd | 208 | switch ((unsigned long)data) { |
1da177e4 LT |
209 | case 0: |
210 | for (i = 0; i < ARRAY_SIZE(acpi_debug_layers); i++) { | |
211 | p += sprintf(p, "%-25s\t0x%08lX [%c]\n", | |
4be44fcd LB |
212 | acpi_debug_layers[i].name, |
213 | acpi_debug_layers[i].value, | |
214 | (acpi_dbg_layer & acpi_debug_layers[i]. | |
215 | value) ? '*' : ' '); | |
1da177e4 LT |
216 | } |
217 | p += sprintf(p, "%-25s\t0x%08X [%c]\n", "ACPI_ALL_DRIVERS", | |
4be44fcd LB |
218 | ACPI_ALL_DRIVERS, |
219 | (acpi_dbg_layer & ACPI_ALL_DRIVERS) == | |
220 | ACPI_ALL_DRIVERS ? '*' : (acpi_dbg_layer & | |
221 | ACPI_ALL_DRIVERS) == | |
222 | 0 ? ' ' : '-'); | |
1da177e4 | 223 | p += sprintf(p, |
4be44fcd LB |
224 | "--\ndebug_layer = 0x%08X (* = enabled, - = partial)\n", |
225 | acpi_dbg_layer); | |
1da177e4 LT |
226 | break; |
227 | case 1: | |
228 | for (i = 0; i < ARRAY_SIZE(acpi_debug_levels); i++) { | |
229 | p += sprintf(p, "%-25s\t0x%08lX [%c]\n", | |
4be44fcd LB |
230 | acpi_debug_levels[i].name, |
231 | acpi_debug_levels[i].value, | |
232 | (acpi_dbg_level & acpi_debug_levels[i]. | |
233 | value) ? '*' : ' '); | |
1da177e4 LT |
234 | } |
235 | p += sprintf(p, "--\ndebug_level = 0x%08X (* = enabled)\n", | |
4be44fcd | 236 | acpi_dbg_level); |
1da177e4 LT |
237 | break; |
238 | default: | |
239 | p += sprintf(p, "Invalid debug option\n"); | |
240 | break; | |
241 | } | |
4be44fcd LB |
242 | |
243 | end: | |
1da177e4 | 244 | size = (p - page); |
4be44fcd LB |
245 | if (size <= off + count) |
246 | *eof = 1; | |
1da177e4 LT |
247 | *start = page + off; |
248 | size -= off; | |
4be44fcd LB |
249 | if (size > count) |
250 | size = count; | |
251 | if (size < 0) | |
252 | size = 0; | |
1da177e4 LT |
253 | |
254 | return size; | |
255 | } | |
256 | ||
1da177e4 | 257 | static int |
4be44fcd LB |
258 | acpi_system_write_debug(struct file *file, |
259 | const char __user * buffer, | |
260 | unsigned long count, void *data) | |
1da177e4 | 261 | { |
4be44fcd | 262 | char debug_string[12] = { '\0' }; |
1da177e4 | 263 | |
1da177e4 LT |
264 | |
265 | if (count > sizeof(debug_string) - 1) | |
d550d98d | 266 | return -EINVAL; |
1da177e4 LT |
267 | |
268 | if (copy_from_user(debug_string, buffer, count)) | |
d550d98d | 269 | return -EFAULT; |
1da177e4 LT |
270 | |
271 | debug_string[count] = '\0'; | |
272 | ||
4be44fcd | 273 | switch ((unsigned long)data) { |
1da177e4 LT |
274 | case 0: |
275 | acpi_dbg_layer = simple_strtoul(debug_string, NULL, 0); | |
276 | break; | |
277 | case 1: | |
278 | acpi_dbg_level = simple_strtoul(debug_string, NULL, 0); | |
279 | break; | |
280 | default: | |
d550d98d | 281 | return -EINVAL; |
1da177e4 LT |
282 | } |
283 | ||
d550d98d | 284 | return count; |
1da177e4 LT |
285 | } |
286 | ||
287 | static int __init acpi_debug_init(void) | |
288 | { | |
4be44fcd | 289 | struct proc_dir_entry *entry; |
1da177e4 | 290 | int error = 0; |
4be44fcd | 291 | char *name; |
1da177e4 | 292 | |
1da177e4 LT |
293 | |
294 | if (acpi_disabled) | |
d550d98d | 295 | return 0; |
1da177e4 LT |
296 | |
297 | /* 'debug_layer' [R/W] */ | |
298 | name = ACPI_SYSTEM_FILE_DEBUG_LAYER; | |
4be44fcd LB |
299 | entry = |
300 | create_proc_read_entry(name, S_IFREG | S_IRUGO | S_IWUSR, | |
301 | acpi_root_dir, acpi_system_read_debug, | |
302 | (void *)0); | |
1da177e4 LT |
303 | if (entry) |
304 | entry->write_proc = acpi_system_write_debug; | |
305 | else | |
306 | goto Error; | |
307 | ||
308 | /* 'debug_level' [R/W] */ | |
309 | name = ACPI_SYSTEM_FILE_DEBUG_LEVEL; | |
4be44fcd LB |
310 | entry = |
311 | create_proc_read_entry(name, S_IFREG | S_IRUGO | S_IWUSR, | |
312 | acpi_root_dir, acpi_system_read_debug, | |
313 | (void *)1); | |
314 | if (entry) | |
1da177e4 LT |
315 | entry->write_proc = acpi_system_write_debug; |
316 | else | |
317 | goto Error; | |
318 | ||
4be44fcd | 319 | Done: |
d550d98d | 320 | return error; |
1da177e4 | 321 | |
4be44fcd | 322 | Error: |
1da177e4 LT |
323 | remove_proc_entry(ACPI_SYSTEM_FILE_DEBUG_LEVEL, acpi_root_dir); |
324 | remove_proc_entry(ACPI_SYSTEM_FILE_DEBUG_LAYER, acpi_root_dir); | |
a6fc6720 | 325 | error = -ENODEV; |
1da177e4 LT |
326 | goto Done; |
327 | } | |
328 | ||
329 | subsys_initcall(acpi_debug_init); | |
219c3c8e | 330 | #endif |