Commit | Line | Data |
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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), | |
bdd72799 BH |
47 | |
48 | ACPI_DEBUG_INIT(ACPI_BUS_COMPONENT), | |
49 | ACPI_DEBUG_INIT(ACPI_AC_COMPONENT), | |
50 | ACPI_DEBUG_INIT(ACPI_BATTERY_COMPONENT), | |
51 | ACPI_DEBUG_INIT(ACPI_BUTTON_COMPONENT), | |
52 | ACPI_DEBUG_INIT(ACPI_SBS_COMPONENT), | |
53 | ACPI_DEBUG_INIT(ACPI_FAN_COMPONENT), | |
54 | ACPI_DEBUG_INIT(ACPI_PCI_COMPONENT), | |
55 | ACPI_DEBUG_INIT(ACPI_POWER_COMPONENT), | |
56 | ACPI_DEBUG_INIT(ACPI_CONTAINER_COMPONENT), | |
57 | ACPI_DEBUG_INIT(ACPI_SYSTEM_COMPONENT), | |
58 | ACPI_DEBUG_INIT(ACPI_THERMAL_COMPONENT), | |
59 | ACPI_DEBUG_INIT(ACPI_MEMORY_DEVICE_COMPONENT), | |
60 | ACPI_DEBUG_INIT(ACPI_VIDEO_COMPONENT), | |
61 | ACPI_DEBUG_INIT(ACPI_PROCESSOR_COMPONENT), | |
1da177e4 LT |
62 | }; |
63 | ||
4be44fcd | 64 | static const struct acpi_dlevel acpi_debug_levels[] = { |
1da177e4 LT |
65 | ACPI_DEBUG_INIT(ACPI_LV_INIT), |
66 | ACPI_DEBUG_INIT(ACPI_LV_DEBUG_OBJECT), | |
67 | ACPI_DEBUG_INIT(ACPI_LV_INFO), | |
68 | ||
69 | ACPI_DEBUG_INIT(ACPI_LV_INIT_NAMES), | |
70 | ACPI_DEBUG_INIT(ACPI_LV_PARSE), | |
71 | ACPI_DEBUG_INIT(ACPI_LV_LOAD), | |
72 | ACPI_DEBUG_INIT(ACPI_LV_DISPATCH), | |
73 | ACPI_DEBUG_INIT(ACPI_LV_EXEC), | |
74 | ACPI_DEBUG_INIT(ACPI_LV_NAMES), | |
75 | ACPI_DEBUG_INIT(ACPI_LV_OPREGION), | |
76 | ACPI_DEBUG_INIT(ACPI_LV_BFIELD), | |
77 | ACPI_DEBUG_INIT(ACPI_LV_TABLES), | |
78 | ACPI_DEBUG_INIT(ACPI_LV_VALUES), | |
79 | ACPI_DEBUG_INIT(ACPI_LV_OBJECTS), | |
80 | ACPI_DEBUG_INIT(ACPI_LV_RESOURCES), | |
81 | ACPI_DEBUG_INIT(ACPI_LV_USER_REQUESTS), | |
82 | ACPI_DEBUG_INIT(ACPI_LV_PACKAGE), | |
83 | ||
84 | ACPI_DEBUG_INIT(ACPI_LV_ALLOCATIONS), | |
85 | ACPI_DEBUG_INIT(ACPI_LV_FUNCTIONS), | |
86 | ACPI_DEBUG_INIT(ACPI_LV_OPTIMIZATIONS), | |
87 | ||
88 | ACPI_DEBUG_INIT(ACPI_LV_MUTEX), | |
89 | ACPI_DEBUG_INIT(ACPI_LV_THREADS), | |
90 | ACPI_DEBUG_INIT(ACPI_LV_IO), | |
91 | ACPI_DEBUG_INIT(ACPI_LV_INTERRUPTS), | |
92 | ||
93 | ACPI_DEBUG_INIT(ACPI_LV_AML_DISASSEMBLE), | |
94 | ACPI_DEBUG_INIT(ACPI_LV_VERBOSE_INFO), | |
95 | ACPI_DEBUG_INIT(ACPI_LV_FULL_TABLES), | |
4be44fcd | 96 | ACPI_DEBUG_INIT(ACPI_LV_EVENTS), |
1da177e4 LT |
97 | }; |
98 | ||
219c3c8e ZR |
99 | /* -------------------------------------------------------------------------- |
100 | FS Interface (/sys) | |
101 | -------------------------------------------------------------------------- */ | |
102 | static int param_get_debug_layer(char *buffer, struct kernel_param *kp) { | |
103 | int result = 0; | |
104 | int i; | |
105 | ||
106 | result = sprintf(buffer, "%-25s\tHex SET\n", "Description"); | |
107 | ||
108 | for(i = 0; i <ARRAY_SIZE(acpi_debug_layers); i++) { | |
109 | result += sprintf(buffer+result, "%-25s\t0x%08lX [%c]\n", | |
110 | acpi_debug_layers[i].name, | |
111 | acpi_debug_layers[i].value, | |
112 | (acpi_dbg_layer & acpi_debug_layers[i].value) ? '*' : ' '); | |
113 | } | |
114 | result += sprintf(buffer+result, "%-25s\t0x%08X [%c]\n", "ACPI_ALL_DRIVERS", | |
115 | ACPI_ALL_DRIVERS, | |
116 | (acpi_dbg_layer & ACPI_ALL_DRIVERS) == | |
117 | ACPI_ALL_DRIVERS ? '*' : (acpi_dbg_layer & | |
118 | ACPI_ALL_DRIVERS) == 0 ? ' ' : '-'); | |
119 | result += sprintf(buffer+result, "--\ndebug_layer = 0x%08X ( * = enabled)\n", acpi_dbg_layer); | |
120 | ||
121 | return result; | |
122 | } | |
123 | ||
124 | static int param_get_debug_level(char *buffer, struct kernel_param *kp) { | |
125 | int result = 0; | |
126 | int i; | |
127 | ||
128 | result = sprintf(buffer, "%-25s\tHex SET\n", "Description"); | |
129 | ||
130 | for (i = 0; i < ARRAY_SIZE(acpi_debug_levels); i++) { | |
131 | result += sprintf(buffer+result, "%-25s\t0x%08lX [%c]\n", | |
132 | acpi_debug_levels[i].name, | |
133 | acpi_debug_levels[i].value, | |
134 | (acpi_dbg_level & acpi_debug_levels[i]. | |
135 | value) ? '*' : ' '); | |
136 | } | |
137 | result += sprintf(buffer+result, "--\ndebug_level = 0x%08X (* = enabled)\n", | |
138 | acpi_dbg_level); | |
139 | ||
140 | return result; | |
141 | } | |
142 | ||
143 | module_param_call(debug_layer, param_set_uint, param_get_debug_layer, &acpi_dbg_layer, 0644); | |
144 | module_param_call(debug_level, param_set_uint, param_get_debug_level, &acpi_dbg_level, 0644); | |
145 | ||
4169c45f ZR |
146 | static char trace_method_name[6]; |
147 | module_param_string(trace_method_name, trace_method_name, 6, 0644); | |
148 | static unsigned int trace_debug_layer; | |
149 | module_param(trace_debug_layer, uint, 0644); | |
150 | static unsigned int trace_debug_level; | |
151 | module_param(trace_debug_level, uint, 0644); | |
152 | ||
153 | static int param_set_trace_state(const char *val, struct kernel_param *kp) | |
154 | { | |
155 | int result = 0; | |
156 | ||
157 | if (!strncmp(val, "enable", strlen("enable") - 1)) { | |
158 | result = acpi_debug_trace(trace_method_name, trace_debug_level, | |
159 | trace_debug_layer, 0); | |
160 | if (result) | |
161 | result = -EBUSY; | |
162 | goto exit; | |
163 | } | |
164 | ||
165 | if (!strncmp(val, "disable", strlen("disable") - 1)) { | |
166 | int name = 0; | |
167 | result = acpi_debug_trace((char *)&name, trace_debug_level, | |
168 | trace_debug_layer, 0); | |
169 | if (result) | |
170 | result = -EBUSY; | |
171 | goto exit; | |
172 | } | |
173 | ||
174 | if (!strncmp(val, "1", 1)) { | |
175 | result = acpi_debug_trace(trace_method_name, trace_debug_level, | |
176 | trace_debug_layer, 1); | |
177 | if (result) | |
178 | result = -EBUSY; | |
179 | goto exit; | |
180 | } | |
181 | ||
182 | result = -EINVAL; | |
183 | exit: | |
184 | return result; | |
185 | } | |
186 | ||
187 | static int param_get_trace_state(char *buffer, struct kernel_param *kp) | |
188 | { | |
189 | if (!acpi_gbl_trace_method_name) | |
190 | return sprintf(buffer, "disable"); | |
191 | else { | |
192 | if (acpi_gbl_trace_flags & 1) | |
193 | return sprintf(buffer, "1"); | |
194 | else | |
195 | return sprintf(buffer, "enable"); | |
196 | } | |
197 | return 0; | |
198 | } | |
199 | ||
200 | module_param_call(trace_state, param_set_trace_state, param_get_trace_state, | |
201 | NULL, 0644); | |
202 | ||
219c3c8e ZR |
203 | /* -------------------------------------------------------------------------- |
204 | FS Interface (/proc) | |
205 | -------------------------------------------------------------------------- */ | |
206 | #ifdef CONFIG_ACPI_PROCFS | |
207 | #define ACPI_SYSTEM_FILE_DEBUG_LAYER "debug_layer" | |
208 | #define ACPI_SYSTEM_FILE_DEBUG_LEVEL "debug_level" | |
209 | ||
1da177e4 | 210 | static int |
4be44fcd LB |
211 | acpi_system_read_debug(char *page, |
212 | char **start, off_t off, int count, int *eof, void *data) | |
1da177e4 | 213 | { |
4be44fcd LB |
214 | char *p = page; |
215 | int size = 0; | |
216 | unsigned int i; | |
1da177e4 LT |
217 | |
218 | if (off != 0) | |
219 | goto end; | |
220 | ||
221 | p += sprintf(p, "%-25s\tHex SET\n", "Description"); | |
222 | ||
4be44fcd | 223 | switch ((unsigned long)data) { |
1da177e4 LT |
224 | case 0: |
225 | for (i = 0; i < ARRAY_SIZE(acpi_debug_layers); i++) { | |
226 | p += sprintf(p, "%-25s\t0x%08lX [%c]\n", | |
4be44fcd LB |
227 | acpi_debug_layers[i].name, |
228 | acpi_debug_layers[i].value, | |
229 | (acpi_dbg_layer & acpi_debug_layers[i]. | |
230 | value) ? '*' : ' '); | |
1da177e4 LT |
231 | } |
232 | p += sprintf(p, "%-25s\t0x%08X [%c]\n", "ACPI_ALL_DRIVERS", | |
4be44fcd LB |
233 | ACPI_ALL_DRIVERS, |
234 | (acpi_dbg_layer & ACPI_ALL_DRIVERS) == | |
235 | ACPI_ALL_DRIVERS ? '*' : (acpi_dbg_layer & | |
236 | ACPI_ALL_DRIVERS) == | |
237 | 0 ? ' ' : '-'); | |
1da177e4 | 238 | p += sprintf(p, |
4be44fcd LB |
239 | "--\ndebug_layer = 0x%08X (* = enabled, - = partial)\n", |
240 | acpi_dbg_layer); | |
1da177e4 LT |
241 | break; |
242 | case 1: | |
243 | for (i = 0; i < ARRAY_SIZE(acpi_debug_levels); i++) { | |
244 | p += sprintf(p, "%-25s\t0x%08lX [%c]\n", | |
4be44fcd LB |
245 | acpi_debug_levels[i].name, |
246 | acpi_debug_levels[i].value, | |
247 | (acpi_dbg_level & acpi_debug_levels[i]. | |
248 | value) ? '*' : ' '); | |
1da177e4 LT |
249 | } |
250 | p += sprintf(p, "--\ndebug_level = 0x%08X (* = enabled)\n", | |
4be44fcd | 251 | acpi_dbg_level); |
1da177e4 LT |
252 | break; |
253 | default: | |
254 | p += sprintf(p, "Invalid debug option\n"); | |
255 | break; | |
256 | } | |
4be44fcd LB |
257 | |
258 | end: | |
1da177e4 | 259 | size = (p - page); |
4be44fcd LB |
260 | if (size <= off + count) |
261 | *eof = 1; | |
1da177e4 LT |
262 | *start = page + off; |
263 | size -= off; | |
4be44fcd LB |
264 | if (size > count) |
265 | size = count; | |
266 | if (size < 0) | |
267 | size = 0; | |
1da177e4 LT |
268 | |
269 | return size; | |
270 | } | |
271 | ||
1da177e4 | 272 | static int |
4be44fcd LB |
273 | acpi_system_write_debug(struct file *file, |
274 | const char __user * buffer, | |
275 | unsigned long count, void *data) | |
1da177e4 | 276 | { |
4be44fcd | 277 | char debug_string[12] = { '\0' }; |
1da177e4 | 278 | |
1da177e4 LT |
279 | |
280 | if (count > sizeof(debug_string) - 1) | |
d550d98d | 281 | return -EINVAL; |
1da177e4 LT |
282 | |
283 | if (copy_from_user(debug_string, buffer, count)) | |
d550d98d | 284 | return -EFAULT; |
1da177e4 LT |
285 | |
286 | debug_string[count] = '\0'; | |
287 | ||
4be44fcd | 288 | switch ((unsigned long)data) { |
1da177e4 LT |
289 | case 0: |
290 | acpi_dbg_layer = simple_strtoul(debug_string, NULL, 0); | |
291 | break; | |
292 | case 1: | |
293 | acpi_dbg_level = simple_strtoul(debug_string, NULL, 0); | |
294 | break; | |
295 | default: | |
d550d98d | 296 | return -EINVAL; |
1da177e4 LT |
297 | } |
298 | ||
d550d98d | 299 | return count; |
1da177e4 LT |
300 | } |
301 | ||
302 | static int __init acpi_debug_init(void) | |
303 | { | |
4be44fcd | 304 | struct proc_dir_entry *entry; |
1da177e4 | 305 | int error = 0; |
4be44fcd | 306 | char *name; |
1da177e4 | 307 | |
1da177e4 LT |
308 | |
309 | if (acpi_disabled) | |
d550d98d | 310 | return 0; |
1da177e4 LT |
311 | |
312 | /* 'debug_layer' [R/W] */ | |
313 | name = ACPI_SYSTEM_FILE_DEBUG_LAYER; | |
4be44fcd LB |
314 | entry = |
315 | create_proc_read_entry(name, S_IFREG | S_IRUGO | S_IWUSR, | |
316 | acpi_root_dir, acpi_system_read_debug, | |
317 | (void *)0); | |
1da177e4 LT |
318 | if (entry) |
319 | entry->write_proc = acpi_system_write_debug; | |
320 | else | |
321 | goto Error; | |
322 | ||
323 | /* 'debug_level' [R/W] */ | |
324 | name = ACPI_SYSTEM_FILE_DEBUG_LEVEL; | |
4be44fcd LB |
325 | entry = |
326 | create_proc_read_entry(name, S_IFREG | S_IRUGO | S_IWUSR, | |
327 | acpi_root_dir, acpi_system_read_debug, | |
328 | (void *)1); | |
329 | if (entry) | |
1da177e4 LT |
330 | entry->write_proc = acpi_system_write_debug; |
331 | else | |
332 | goto Error; | |
333 | ||
4be44fcd | 334 | Done: |
d550d98d | 335 | return error; |
1da177e4 | 336 | |
4be44fcd | 337 | Error: |
1da177e4 LT |
338 | remove_proc_entry(ACPI_SYSTEM_FILE_DEBUG_LEVEL, acpi_root_dir); |
339 | remove_proc_entry(ACPI_SYSTEM_FILE_DEBUG_LAYER, acpi_root_dir); | |
a6fc6720 | 340 | error = -ENODEV; |
1da177e4 LT |
341 | goto Done; |
342 | } | |
343 | ||
344 | subsys_initcall(acpi_debug_init); | |
219c3c8e | 345 | #endif |