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> | |
1da177e4 LT |
12 | |
13 | #define _COMPONENT ACPI_SYSTEM_COMPONENT | |
f52fd66d | 14 | ACPI_MODULE_NAME("debug"); |
219c3c8e | 15 | |
1da177e4 LT |
16 | #ifdef MODULE_PARAM_PREFIX |
17 | #undef MODULE_PARAM_PREFIX | |
18 | #endif | |
219c3c8e | 19 | #define MODULE_PARAM_PREFIX "acpi." |
1da177e4 LT |
20 | |
21 | struct acpi_dlayer { | |
22 | const char *name; | |
23 | unsigned long value; | |
24 | }; | |
25 | struct acpi_dlevel { | |
26 | const char *name; | |
27 | unsigned long value; | |
28 | }; | |
29 | #define ACPI_DEBUG_INIT(v) { .name = #v, .value = v } | |
30 | ||
4be44fcd | 31 | static const struct acpi_dlayer acpi_debug_layers[] = { |
1da177e4 LT |
32 | ACPI_DEBUG_INIT(ACPI_UTILITIES), |
33 | ACPI_DEBUG_INIT(ACPI_HARDWARE), | |
34 | ACPI_DEBUG_INIT(ACPI_EVENTS), | |
35 | ACPI_DEBUG_INIT(ACPI_TABLES), | |
36 | ACPI_DEBUG_INIT(ACPI_NAMESPACE), | |
37 | ACPI_DEBUG_INIT(ACPI_PARSER), | |
38 | ACPI_DEBUG_INIT(ACPI_DISPATCHER), | |
39 | ACPI_DEBUG_INIT(ACPI_EXECUTER), | |
40 | ACPI_DEBUG_INIT(ACPI_RESOURCES), | |
41 | ACPI_DEBUG_INIT(ACPI_CA_DEBUGGER), | |
42 | ACPI_DEBUG_INIT(ACPI_OS_SERVICES), | |
43 | ACPI_DEBUG_INIT(ACPI_CA_DISASSEMBLER), | |
44 | ACPI_DEBUG_INIT(ACPI_COMPILER), | |
45 | ACPI_DEBUG_INIT(ACPI_TOOLS), | |
bdd72799 BH |
46 | |
47 | ACPI_DEBUG_INIT(ACPI_BUS_COMPONENT), | |
48 | ACPI_DEBUG_INIT(ACPI_AC_COMPONENT), | |
49 | ACPI_DEBUG_INIT(ACPI_BATTERY_COMPONENT), | |
50 | ACPI_DEBUG_INIT(ACPI_BUTTON_COMPONENT), | |
51 | ACPI_DEBUG_INIT(ACPI_SBS_COMPONENT), | |
52 | ACPI_DEBUG_INIT(ACPI_FAN_COMPONENT), | |
53 | ACPI_DEBUG_INIT(ACPI_PCI_COMPONENT), | |
54 | ACPI_DEBUG_INIT(ACPI_POWER_COMPONENT), | |
55 | ACPI_DEBUG_INIT(ACPI_CONTAINER_COMPONENT), | |
56 | ACPI_DEBUG_INIT(ACPI_SYSTEM_COMPONENT), | |
57 | ACPI_DEBUG_INIT(ACPI_THERMAL_COMPONENT), | |
58 | ACPI_DEBUG_INIT(ACPI_MEMORY_DEVICE_COMPONENT), | |
59 | ACPI_DEBUG_INIT(ACPI_VIDEO_COMPONENT), | |
60 | ACPI_DEBUG_INIT(ACPI_PROCESSOR_COMPONENT), | |
1da177e4 LT |
61 | }; |
62 | ||
4be44fcd | 63 | static const struct acpi_dlevel acpi_debug_levels[] = { |
1da177e4 LT |
64 | ACPI_DEBUG_INIT(ACPI_LV_INIT), |
65 | ACPI_DEBUG_INIT(ACPI_LV_DEBUG_OBJECT), | |
66 | ACPI_DEBUG_INIT(ACPI_LV_INFO), | |
67 | ||
68 | ACPI_DEBUG_INIT(ACPI_LV_INIT_NAMES), | |
69 | ACPI_DEBUG_INIT(ACPI_LV_PARSE), | |
70 | ACPI_DEBUG_INIT(ACPI_LV_LOAD), | |
71 | ACPI_DEBUG_INIT(ACPI_LV_DISPATCH), | |
72 | ACPI_DEBUG_INIT(ACPI_LV_EXEC), | |
73 | ACPI_DEBUG_INIT(ACPI_LV_NAMES), | |
74 | ACPI_DEBUG_INIT(ACPI_LV_OPREGION), | |
75 | ACPI_DEBUG_INIT(ACPI_LV_BFIELD), | |
76 | ACPI_DEBUG_INIT(ACPI_LV_TABLES), | |
77 | ACPI_DEBUG_INIT(ACPI_LV_VALUES), | |
78 | ACPI_DEBUG_INIT(ACPI_LV_OBJECTS), | |
79 | ACPI_DEBUG_INIT(ACPI_LV_RESOURCES), | |
80 | ACPI_DEBUG_INIT(ACPI_LV_USER_REQUESTS), | |
81 | ACPI_DEBUG_INIT(ACPI_LV_PACKAGE), | |
82 | ||
83 | ACPI_DEBUG_INIT(ACPI_LV_ALLOCATIONS), | |
84 | ACPI_DEBUG_INIT(ACPI_LV_FUNCTIONS), | |
85 | ACPI_DEBUG_INIT(ACPI_LV_OPTIMIZATIONS), | |
86 | ||
87 | ACPI_DEBUG_INIT(ACPI_LV_MUTEX), | |
88 | ACPI_DEBUG_INIT(ACPI_LV_THREADS), | |
89 | ACPI_DEBUG_INIT(ACPI_LV_IO), | |
90 | ACPI_DEBUG_INIT(ACPI_LV_INTERRUPTS), | |
91 | ||
92 | ACPI_DEBUG_INIT(ACPI_LV_AML_DISASSEMBLE), | |
93 | ACPI_DEBUG_INIT(ACPI_LV_VERBOSE_INFO), | |
94 | ACPI_DEBUG_INIT(ACPI_LV_FULL_TABLES), | |
4be44fcd | 95 | ACPI_DEBUG_INIT(ACPI_LV_EVENTS), |
1da177e4 LT |
96 | }; |
97 | ||
219c3c8e ZR |
98 | /* -------------------------------------------------------------------------- |
99 | FS Interface (/sys) | |
100 | -------------------------------------------------------------------------- */ | |
101 | static int param_get_debug_layer(char *buffer, struct kernel_param *kp) { | |
102 | int result = 0; | |
103 | int i; | |
104 | ||
105 | result = sprintf(buffer, "%-25s\tHex SET\n", "Description"); | |
106 | ||
107 | for(i = 0; i <ARRAY_SIZE(acpi_debug_layers); i++) { | |
108 | result += sprintf(buffer+result, "%-25s\t0x%08lX [%c]\n", | |
109 | acpi_debug_layers[i].name, | |
110 | acpi_debug_layers[i].value, | |
111 | (acpi_dbg_layer & acpi_debug_layers[i].value) ? '*' : ' '); | |
112 | } | |
113 | result += sprintf(buffer+result, "%-25s\t0x%08X [%c]\n", "ACPI_ALL_DRIVERS", | |
114 | ACPI_ALL_DRIVERS, | |
115 | (acpi_dbg_layer & ACPI_ALL_DRIVERS) == | |
116 | ACPI_ALL_DRIVERS ? '*' : (acpi_dbg_layer & | |
117 | ACPI_ALL_DRIVERS) == 0 ? ' ' : '-'); | |
118 | result += sprintf(buffer+result, "--\ndebug_layer = 0x%08X ( * = enabled)\n", acpi_dbg_layer); | |
119 | ||
120 | return result; | |
121 | } | |
122 | ||
123 | static int param_get_debug_level(char *buffer, struct kernel_param *kp) { | |
124 | int result = 0; | |
125 | int i; | |
126 | ||
127 | result = sprintf(buffer, "%-25s\tHex SET\n", "Description"); | |
128 | ||
129 | for (i = 0; i < ARRAY_SIZE(acpi_debug_levels); i++) { | |
130 | result += sprintf(buffer+result, "%-25s\t0x%08lX [%c]\n", | |
131 | acpi_debug_levels[i].name, | |
132 | acpi_debug_levels[i].value, | |
133 | (acpi_dbg_level & acpi_debug_levels[i]. | |
134 | value) ? '*' : ' '); | |
135 | } | |
136 | result += sprintf(buffer+result, "--\ndebug_level = 0x%08X (* = enabled)\n", | |
137 | acpi_dbg_level); | |
138 | ||
139 | return result; | |
140 | } | |
141 | ||
142 | module_param_call(debug_layer, param_set_uint, param_get_debug_layer, &acpi_dbg_layer, 0644); | |
143 | module_param_call(debug_level, param_set_uint, param_get_debug_level, &acpi_dbg_level, 0644); | |
144 | ||
4169c45f ZR |
145 | static char trace_method_name[6]; |
146 | module_param_string(trace_method_name, trace_method_name, 6, 0644); | |
147 | static unsigned int trace_debug_layer; | |
148 | module_param(trace_debug_layer, uint, 0644); | |
149 | static unsigned int trace_debug_level; | |
150 | module_param(trace_debug_level, uint, 0644); | |
151 | ||
152 | static int param_set_trace_state(const char *val, struct kernel_param *kp) | |
153 | { | |
154 | int result = 0; | |
155 | ||
156 | if (!strncmp(val, "enable", strlen("enable") - 1)) { | |
157 | result = acpi_debug_trace(trace_method_name, trace_debug_level, | |
158 | trace_debug_layer, 0); | |
159 | if (result) | |
160 | result = -EBUSY; | |
161 | goto exit; | |
162 | } | |
163 | ||
164 | if (!strncmp(val, "disable", strlen("disable") - 1)) { | |
165 | int name = 0; | |
166 | result = acpi_debug_trace((char *)&name, trace_debug_level, | |
167 | trace_debug_layer, 0); | |
168 | if (result) | |
169 | result = -EBUSY; | |
170 | goto exit; | |
171 | } | |
172 | ||
173 | if (!strncmp(val, "1", 1)) { | |
174 | result = acpi_debug_trace(trace_method_name, trace_debug_level, | |
175 | trace_debug_layer, 1); | |
176 | if (result) | |
177 | result = -EBUSY; | |
178 | goto exit; | |
179 | } | |
180 | ||
181 | result = -EINVAL; | |
182 | exit: | |
183 | return result; | |
184 | } | |
185 | ||
186 | static int param_get_trace_state(char *buffer, struct kernel_param *kp) | |
187 | { | |
188 | if (!acpi_gbl_trace_method_name) | |
189 | return sprintf(buffer, "disable"); | |
190 | else { | |
191 | if (acpi_gbl_trace_flags & 1) | |
192 | return sprintf(buffer, "1"); | |
193 | else | |
194 | return sprintf(buffer, "enable"); | |
195 | } | |
196 | return 0; | |
197 | } | |
198 | ||
199 | module_param_call(trace_state, param_set_trace_state, param_get_trace_state, | |
200 | NULL, 0644); | |
201 | ||
219c3c8e ZR |
202 | /* -------------------------------------------------------------------------- |
203 | FS Interface (/proc) | |
204 | -------------------------------------------------------------------------- */ | |
205 | #ifdef CONFIG_ACPI_PROCFS | |
206 | #define ACPI_SYSTEM_FILE_DEBUG_LAYER "debug_layer" | |
207 | #define ACPI_SYSTEM_FILE_DEBUG_LEVEL "debug_level" | |
208 | ||
1da177e4 | 209 | static int |
4be44fcd LB |
210 | acpi_system_read_debug(char *page, |
211 | char **start, off_t off, int count, int *eof, void *data) | |
1da177e4 | 212 | { |
4be44fcd LB |
213 | char *p = page; |
214 | int size = 0; | |
215 | unsigned int i; | |
1da177e4 LT |
216 | |
217 | if (off != 0) | |
218 | goto end; | |
219 | ||
220 | p += sprintf(p, "%-25s\tHex SET\n", "Description"); | |
221 | ||
4be44fcd | 222 | switch ((unsigned long)data) { |
1da177e4 LT |
223 | case 0: |
224 | for (i = 0; i < ARRAY_SIZE(acpi_debug_layers); i++) { | |
225 | p += sprintf(p, "%-25s\t0x%08lX [%c]\n", | |
4be44fcd LB |
226 | acpi_debug_layers[i].name, |
227 | acpi_debug_layers[i].value, | |
228 | (acpi_dbg_layer & acpi_debug_layers[i]. | |
229 | value) ? '*' : ' '); | |
1da177e4 LT |
230 | } |
231 | p += sprintf(p, "%-25s\t0x%08X [%c]\n", "ACPI_ALL_DRIVERS", | |
4be44fcd LB |
232 | ACPI_ALL_DRIVERS, |
233 | (acpi_dbg_layer & ACPI_ALL_DRIVERS) == | |
234 | ACPI_ALL_DRIVERS ? '*' : (acpi_dbg_layer & | |
235 | ACPI_ALL_DRIVERS) == | |
236 | 0 ? ' ' : '-'); | |
1da177e4 | 237 | p += sprintf(p, |
4be44fcd LB |
238 | "--\ndebug_layer = 0x%08X (* = enabled, - = partial)\n", |
239 | acpi_dbg_layer); | |
1da177e4 LT |
240 | break; |
241 | case 1: | |
242 | for (i = 0; i < ARRAY_SIZE(acpi_debug_levels); i++) { | |
243 | p += sprintf(p, "%-25s\t0x%08lX [%c]\n", | |
4be44fcd LB |
244 | acpi_debug_levels[i].name, |
245 | acpi_debug_levels[i].value, | |
246 | (acpi_dbg_level & acpi_debug_levels[i]. | |
247 | value) ? '*' : ' '); | |
1da177e4 LT |
248 | } |
249 | p += sprintf(p, "--\ndebug_level = 0x%08X (* = enabled)\n", | |
4be44fcd | 250 | acpi_dbg_level); |
1da177e4 LT |
251 | break; |
252 | default: | |
253 | p += sprintf(p, "Invalid debug option\n"); | |
254 | break; | |
255 | } | |
4be44fcd LB |
256 | |
257 | end: | |
1da177e4 | 258 | size = (p - page); |
4be44fcd LB |
259 | if (size <= off + count) |
260 | *eof = 1; | |
1da177e4 LT |
261 | *start = page + off; |
262 | size -= off; | |
4be44fcd LB |
263 | if (size > count) |
264 | size = count; | |
265 | if (size < 0) | |
266 | size = 0; | |
1da177e4 LT |
267 | |
268 | return size; | |
269 | } | |
270 | ||
1da177e4 | 271 | static int |
4be44fcd LB |
272 | acpi_system_write_debug(struct file *file, |
273 | const char __user * buffer, | |
274 | unsigned long count, void *data) | |
1da177e4 | 275 | { |
4be44fcd | 276 | char debug_string[12] = { '\0' }; |
1da177e4 | 277 | |
1da177e4 LT |
278 | |
279 | if (count > sizeof(debug_string) - 1) | |
d550d98d | 280 | return -EINVAL; |
1da177e4 LT |
281 | |
282 | if (copy_from_user(debug_string, buffer, count)) | |
d550d98d | 283 | return -EFAULT; |
1da177e4 LT |
284 | |
285 | debug_string[count] = '\0'; | |
286 | ||
4be44fcd | 287 | switch ((unsigned long)data) { |
1da177e4 LT |
288 | case 0: |
289 | acpi_dbg_layer = simple_strtoul(debug_string, NULL, 0); | |
290 | break; | |
291 | case 1: | |
292 | acpi_dbg_level = simple_strtoul(debug_string, NULL, 0); | |
293 | break; | |
294 | default: | |
d550d98d | 295 | return -EINVAL; |
1da177e4 LT |
296 | } |
297 | ||
d550d98d | 298 | return count; |
1da177e4 LT |
299 | } |
300 | ||
301 | static int __init acpi_debug_init(void) | |
302 | { | |
4be44fcd | 303 | struct proc_dir_entry *entry; |
1da177e4 | 304 | int error = 0; |
4be44fcd | 305 | char *name; |
1da177e4 | 306 | |
1da177e4 LT |
307 | |
308 | if (acpi_disabled) | |
d550d98d | 309 | return 0; |
1da177e4 LT |
310 | |
311 | /* 'debug_layer' [R/W] */ | |
312 | name = ACPI_SYSTEM_FILE_DEBUG_LAYER; | |
4be44fcd LB |
313 | entry = |
314 | create_proc_read_entry(name, S_IFREG | S_IRUGO | S_IWUSR, | |
315 | acpi_root_dir, acpi_system_read_debug, | |
316 | (void *)0); | |
1da177e4 LT |
317 | if (entry) |
318 | entry->write_proc = acpi_system_write_debug; | |
319 | else | |
320 | goto Error; | |
321 | ||
322 | /* 'debug_level' [R/W] */ | |
323 | name = ACPI_SYSTEM_FILE_DEBUG_LEVEL; | |
4be44fcd LB |
324 | entry = |
325 | create_proc_read_entry(name, S_IFREG | S_IRUGO | S_IWUSR, | |
326 | acpi_root_dir, acpi_system_read_debug, | |
327 | (void *)1); | |
328 | if (entry) | |
1da177e4 LT |
329 | entry->write_proc = acpi_system_write_debug; |
330 | else | |
331 | goto Error; | |
332 | ||
4be44fcd | 333 | Done: |
d550d98d | 334 | return error; |
1da177e4 | 335 | |
4be44fcd | 336 | Error: |
1da177e4 LT |
337 | remove_proc_entry(ACPI_SYSTEM_FILE_DEBUG_LEVEL, acpi_root_dir); |
338 | remove_proc_entry(ACPI_SYSTEM_FILE_DEBUG_LAYER, acpi_root_dir); | |
a6fc6720 | 339 | error = -ENODEV; |
1da177e4 LT |
340 | goto Done; |
341 | } | |
342 | ||
343 | subsys_initcall(acpi_debug_init); | |
219c3c8e | 344 | #endif |