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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> | |
7d7decb2 | 6 | #include <linux/seq_file.h> |
1da177e4 LT |
7 | #include <linux/init.h> |
8 | #include <linux/module.h> | |
9 | #include <linux/kernel.h> | |
10 | #include <linux/moduleparam.h> | |
a1a541d8 | 11 | #include <linux/debugfs.h> |
1da177e4 LT |
12 | #include <asm/uaccess.h> |
13 | #include <acpi/acpi_drivers.h> | |
1da177e4 LT |
14 | |
15 | #define _COMPONENT ACPI_SYSTEM_COMPONENT | |
f52fd66d | 16 | ACPI_MODULE_NAME("debug"); |
219c3c8e | 17 | |
1da177e4 LT |
18 | struct acpi_dlayer { |
19 | const char *name; | |
20 | unsigned long value; | |
21 | }; | |
22 | struct acpi_dlevel { | |
23 | const char *name; | |
24 | unsigned long value; | |
25 | }; | |
26 | #define ACPI_DEBUG_INIT(v) { .name = #v, .value = v } | |
27 | ||
4be44fcd | 28 | static const struct acpi_dlayer acpi_debug_layers[] = { |
1da177e4 LT |
29 | ACPI_DEBUG_INIT(ACPI_UTILITIES), |
30 | ACPI_DEBUG_INIT(ACPI_HARDWARE), | |
31 | ACPI_DEBUG_INIT(ACPI_EVENTS), | |
32 | ACPI_DEBUG_INIT(ACPI_TABLES), | |
33 | ACPI_DEBUG_INIT(ACPI_NAMESPACE), | |
34 | ACPI_DEBUG_INIT(ACPI_PARSER), | |
35 | ACPI_DEBUG_INIT(ACPI_DISPATCHER), | |
36 | ACPI_DEBUG_INIT(ACPI_EXECUTER), | |
37 | ACPI_DEBUG_INIT(ACPI_RESOURCES), | |
38 | ACPI_DEBUG_INIT(ACPI_CA_DEBUGGER), | |
39 | ACPI_DEBUG_INIT(ACPI_OS_SERVICES), | |
40 | ACPI_DEBUG_INIT(ACPI_CA_DISASSEMBLER), | |
41 | ACPI_DEBUG_INIT(ACPI_COMPILER), | |
42 | ACPI_DEBUG_INIT(ACPI_TOOLS), | |
bdd72799 BH |
43 | |
44 | ACPI_DEBUG_INIT(ACPI_BUS_COMPONENT), | |
45 | ACPI_DEBUG_INIT(ACPI_AC_COMPONENT), | |
46 | ACPI_DEBUG_INIT(ACPI_BATTERY_COMPONENT), | |
47 | ACPI_DEBUG_INIT(ACPI_BUTTON_COMPONENT), | |
48 | ACPI_DEBUG_INIT(ACPI_SBS_COMPONENT), | |
49 | ACPI_DEBUG_INIT(ACPI_FAN_COMPONENT), | |
50 | ACPI_DEBUG_INIT(ACPI_PCI_COMPONENT), | |
51 | ACPI_DEBUG_INIT(ACPI_POWER_COMPONENT), | |
52 | ACPI_DEBUG_INIT(ACPI_CONTAINER_COMPONENT), | |
53 | ACPI_DEBUG_INIT(ACPI_SYSTEM_COMPONENT), | |
54 | ACPI_DEBUG_INIT(ACPI_THERMAL_COMPONENT), | |
55 | ACPI_DEBUG_INIT(ACPI_MEMORY_DEVICE_COMPONENT), | |
56 | ACPI_DEBUG_INIT(ACPI_VIDEO_COMPONENT), | |
57 | ACPI_DEBUG_INIT(ACPI_PROCESSOR_COMPONENT), | |
1da177e4 LT |
58 | }; |
59 | ||
4be44fcd | 60 | static const struct acpi_dlevel acpi_debug_levels[] = { |
1da177e4 LT |
61 | ACPI_DEBUG_INIT(ACPI_LV_INIT), |
62 | ACPI_DEBUG_INIT(ACPI_LV_DEBUG_OBJECT), | |
63 | ACPI_DEBUG_INIT(ACPI_LV_INFO), | |
64 | ||
65 | ACPI_DEBUG_INIT(ACPI_LV_INIT_NAMES), | |
66 | ACPI_DEBUG_INIT(ACPI_LV_PARSE), | |
67 | ACPI_DEBUG_INIT(ACPI_LV_LOAD), | |
68 | ACPI_DEBUG_INIT(ACPI_LV_DISPATCH), | |
69 | ACPI_DEBUG_INIT(ACPI_LV_EXEC), | |
70 | ACPI_DEBUG_INIT(ACPI_LV_NAMES), | |
71 | ACPI_DEBUG_INIT(ACPI_LV_OPREGION), | |
72 | ACPI_DEBUG_INIT(ACPI_LV_BFIELD), | |
73 | ACPI_DEBUG_INIT(ACPI_LV_TABLES), | |
74 | ACPI_DEBUG_INIT(ACPI_LV_VALUES), | |
75 | ACPI_DEBUG_INIT(ACPI_LV_OBJECTS), | |
76 | ACPI_DEBUG_INIT(ACPI_LV_RESOURCES), | |
77 | ACPI_DEBUG_INIT(ACPI_LV_USER_REQUESTS), | |
78 | ACPI_DEBUG_INIT(ACPI_LV_PACKAGE), | |
79 | ||
80 | ACPI_DEBUG_INIT(ACPI_LV_ALLOCATIONS), | |
81 | ACPI_DEBUG_INIT(ACPI_LV_FUNCTIONS), | |
82 | ACPI_DEBUG_INIT(ACPI_LV_OPTIMIZATIONS), | |
83 | ||
84 | ACPI_DEBUG_INIT(ACPI_LV_MUTEX), | |
85 | ACPI_DEBUG_INIT(ACPI_LV_THREADS), | |
86 | ACPI_DEBUG_INIT(ACPI_LV_IO), | |
87 | ACPI_DEBUG_INIT(ACPI_LV_INTERRUPTS), | |
88 | ||
89 | ACPI_DEBUG_INIT(ACPI_LV_AML_DISASSEMBLE), | |
90 | ACPI_DEBUG_INIT(ACPI_LV_VERBOSE_INFO), | |
91 | ACPI_DEBUG_INIT(ACPI_LV_FULL_TABLES), | |
4be44fcd | 92 | ACPI_DEBUG_INIT(ACPI_LV_EVENTS), |
1da177e4 LT |
93 | }; |
94 | ||
219c3c8e ZR |
95 | /* -------------------------------------------------------------------------- |
96 | FS Interface (/sys) | |
97 | -------------------------------------------------------------------------- */ | |
98 | static int param_get_debug_layer(char *buffer, struct kernel_param *kp) { | |
99 | int result = 0; | |
100 | int i; | |
101 | ||
102 | result = sprintf(buffer, "%-25s\tHex SET\n", "Description"); | |
103 | ||
104 | for(i = 0; i <ARRAY_SIZE(acpi_debug_layers); i++) { | |
105 | result += sprintf(buffer+result, "%-25s\t0x%08lX [%c]\n", | |
106 | acpi_debug_layers[i].name, | |
107 | acpi_debug_layers[i].value, | |
108 | (acpi_dbg_layer & acpi_debug_layers[i].value) ? '*' : ' '); | |
109 | } | |
110 | result += sprintf(buffer+result, "%-25s\t0x%08X [%c]\n", "ACPI_ALL_DRIVERS", | |
111 | ACPI_ALL_DRIVERS, | |
112 | (acpi_dbg_layer & ACPI_ALL_DRIVERS) == | |
113 | ACPI_ALL_DRIVERS ? '*' : (acpi_dbg_layer & | |
114 | ACPI_ALL_DRIVERS) == 0 ? ' ' : '-'); | |
115 | result += sprintf(buffer+result, "--\ndebug_layer = 0x%08X ( * = enabled)\n", acpi_dbg_layer); | |
116 | ||
117 | return result; | |
118 | } | |
119 | ||
120 | static int param_get_debug_level(char *buffer, struct kernel_param *kp) { | |
121 | int result = 0; | |
122 | int i; | |
123 | ||
124 | result = sprintf(buffer, "%-25s\tHex SET\n", "Description"); | |
125 | ||
126 | for (i = 0; i < ARRAY_SIZE(acpi_debug_levels); i++) { | |
127 | result += sprintf(buffer+result, "%-25s\t0x%08lX [%c]\n", | |
128 | acpi_debug_levels[i].name, | |
129 | acpi_debug_levels[i].value, | |
130 | (acpi_dbg_level & acpi_debug_levels[i]. | |
131 | value) ? '*' : ' '); | |
132 | } | |
133 | result += sprintf(buffer+result, "--\ndebug_level = 0x%08X (* = enabled)\n", | |
134 | acpi_dbg_level); | |
135 | ||
136 | return result; | |
137 | } | |
138 | ||
139 | module_param_call(debug_layer, param_set_uint, param_get_debug_layer, &acpi_dbg_layer, 0644); | |
140 | module_param_call(debug_level, param_set_uint, param_get_debug_level, &acpi_dbg_level, 0644); | |
141 | ||
4169c45f ZR |
142 | static char trace_method_name[6]; |
143 | module_param_string(trace_method_name, trace_method_name, 6, 0644); | |
144 | static unsigned int trace_debug_layer; | |
145 | module_param(trace_debug_layer, uint, 0644); | |
146 | static unsigned int trace_debug_level; | |
147 | module_param(trace_debug_level, uint, 0644); | |
148 | ||
149 | static int param_set_trace_state(const char *val, struct kernel_param *kp) | |
150 | { | |
151 | int result = 0; | |
152 | ||
153 | if (!strncmp(val, "enable", strlen("enable") - 1)) { | |
154 | result = acpi_debug_trace(trace_method_name, trace_debug_level, | |
155 | trace_debug_layer, 0); | |
156 | if (result) | |
157 | result = -EBUSY; | |
158 | goto exit; | |
159 | } | |
160 | ||
161 | if (!strncmp(val, "disable", strlen("disable") - 1)) { | |
162 | int name = 0; | |
163 | result = acpi_debug_trace((char *)&name, trace_debug_level, | |
164 | trace_debug_layer, 0); | |
165 | if (result) | |
166 | result = -EBUSY; | |
167 | goto exit; | |
168 | } | |
169 | ||
170 | if (!strncmp(val, "1", 1)) { | |
171 | result = acpi_debug_trace(trace_method_name, trace_debug_level, | |
172 | trace_debug_layer, 1); | |
173 | if (result) | |
174 | result = -EBUSY; | |
175 | goto exit; | |
176 | } | |
177 | ||
178 | result = -EINVAL; | |
179 | exit: | |
180 | return result; | |
181 | } | |
182 | ||
183 | static int param_get_trace_state(char *buffer, struct kernel_param *kp) | |
184 | { | |
185 | if (!acpi_gbl_trace_method_name) | |
186 | return sprintf(buffer, "disable"); | |
187 | else { | |
188 | if (acpi_gbl_trace_flags & 1) | |
189 | return sprintf(buffer, "1"); | |
190 | else | |
191 | return sprintf(buffer, "enable"); | |
192 | } | |
193 | return 0; | |
194 | } | |
195 | ||
196 | module_param_call(trace_state, param_set_trace_state, param_get_trace_state, | |
197 | NULL, 0644); | |
198 | ||
a1a541d8 ZR |
199 | /* -------------------------------------------------------------------------- |
200 | DebugFS Interface | |
201 | -------------------------------------------------------------------------- */ | |
202 | ||
203 | static ssize_t cm_write(struct file *file, const char __user *user_buf, | |
204 | size_t count, loff_t *ppos) | |
205 | { | |
206 | static char *buf; | |
207 | static int uncopied_bytes; | |
208 | struct acpi_table_header table; | |
209 | acpi_status status; | |
210 | ||
211 | if (!(*ppos)) { | |
212 | /* parse the table header to get the table length */ | |
213 | if (count <= sizeof(struct acpi_table_header)) | |
214 | return -EINVAL; | |
215 | if (copy_from_user(&table, user_buf, | |
216 | sizeof(struct acpi_table_header))) | |
217 | return -EFAULT; | |
218 | uncopied_bytes = table.length; | |
219 | buf = kzalloc(uncopied_bytes, GFP_KERNEL); | |
220 | if (!buf) | |
221 | return -ENOMEM; | |
222 | } | |
223 | ||
224 | if (uncopied_bytes < count) { | |
225 | kfree(buf); | |
226 | return -EINVAL; | |
227 | } | |
228 | ||
229 | if (copy_from_user(buf + (*ppos), user_buf, count)) { | |
230 | kfree(buf); | |
231 | return -EFAULT; | |
232 | } | |
233 | ||
234 | uncopied_bytes -= count; | |
235 | *ppos += count; | |
236 | ||
237 | if (!uncopied_bytes) { | |
238 | status = acpi_install_method(buf); | |
239 | kfree(buf); | |
240 | if (ACPI_FAILURE(status)) | |
241 | return -EINVAL; | |
4bab30a0 | 242 | add_taint(TAINT_OVERRIDDEN_ACPI_TABLE); |
a1a541d8 ZR |
243 | } |
244 | ||
245 | return count; | |
246 | } | |
247 | ||
248 | static const struct file_operations cm_fops = { | |
249 | .write = cm_write, | |
250 | }; | |
251 | ||
252 | static int acpi_debugfs_init(void) | |
253 | { | |
254 | struct dentry *acpi_dir, *cm_dentry; | |
255 | ||
256 | acpi_dir = debugfs_create_dir("acpi", NULL); | |
257 | if (!acpi_dir) | |
258 | goto err; | |
259 | ||
260 | cm_dentry = debugfs_create_file("custom_method", S_IWUGO, | |
261 | acpi_dir, NULL, &cm_fops); | |
262 | if (!cm_dentry) | |
263 | goto err; | |
264 | ||
265 | return 0; | |
266 | ||
267 | err: | |
268 | if (acpi_dir) | |
269 | debugfs_remove(acpi_dir); | |
270 | return -EINVAL; | |
271 | } | |
272 | ||
219c3c8e ZR |
273 | /* -------------------------------------------------------------------------- |
274 | FS Interface (/proc) | |
275 | -------------------------------------------------------------------------- */ | |
276 | #ifdef CONFIG_ACPI_PROCFS | |
277 | #define ACPI_SYSTEM_FILE_DEBUG_LAYER "debug_layer" | |
278 | #define ACPI_SYSTEM_FILE_DEBUG_LEVEL "debug_level" | |
279 | ||
7d7decb2 | 280 | static int acpi_system_debug_proc_show(struct seq_file *m, void *v) |
1da177e4 | 281 | { |
4be44fcd | 282 | unsigned int i; |
1da177e4 | 283 | |
7d7decb2 | 284 | seq_printf(m, "%-25s\tHex SET\n", "Description"); |
1da177e4 | 285 | |
7d7decb2 | 286 | switch ((unsigned long)m->private) { |
1da177e4 LT |
287 | case 0: |
288 | for (i = 0; i < ARRAY_SIZE(acpi_debug_layers); i++) { | |
7d7decb2 | 289 | seq_printf(m, "%-25s\t0x%08lX [%c]\n", |
4be44fcd LB |
290 | acpi_debug_layers[i].name, |
291 | acpi_debug_layers[i].value, | |
292 | (acpi_dbg_layer & acpi_debug_layers[i]. | |
293 | value) ? '*' : ' '); | |
1da177e4 | 294 | } |
7d7decb2 | 295 | seq_printf(m, "%-25s\t0x%08X [%c]\n", "ACPI_ALL_DRIVERS", |
4be44fcd LB |
296 | ACPI_ALL_DRIVERS, |
297 | (acpi_dbg_layer & ACPI_ALL_DRIVERS) == | |
298 | ACPI_ALL_DRIVERS ? '*' : (acpi_dbg_layer & | |
299 | ACPI_ALL_DRIVERS) == | |
300 | 0 ? ' ' : '-'); | |
7d7decb2 | 301 | seq_printf(m, |
4be44fcd LB |
302 | "--\ndebug_layer = 0x%08X (* = enabled, - = partial)\n", |
303 | acpi_dbg_layer); | |
1da177e4 LT |
304 | break; |
305 | case 1: | |
306 | for (i = 0; i < ARRAY_SIZE(acpi_debug_levels); i++) { | |
7d7decb2 | 307 | seq_printf(m, "%-25s\t0x%08lX [%c]\n", |
4be44fcd LB |
308 | acpi_debug_levels[i].name, |
309 | acpi_debug_levels[i].value, | |
310 | (acpi_dbg_level & acpi_debug_levels[i]. | |
311 | value) ? '*' : ' '); | |
1da177e4 | 312 | } |
7d7decb2 | 313 | seq_printf(m, "--\ndebug_level = 0x%08X (* = enabled)\n", |
4be44fcd | 314 | acpi_dbg_level); |
1da177e4 | 315 | break; |
1da177e4 | 316 | } |
7d7decb2 AD |
317 | return 0; |
318 | } | |
4be44fcd | 319 | |
7d7decb2 AD |
320 | static int acpi_system_debug_proc_open(struct inode *inode, struct file *file) |
321 | { | |
322 | return single_open(file, acpi_system_debug_proc_show, PDE(inode)->data); | |
1da177e4 LT |
323 | } |
324 | ||
7d7decb2 | 325 | static ssize_t acpi_system_debug_proc_write(struct file *file, |
4be44fcd | 326 | const char __user * buffer, |
7d7decb2 | 327 | size_t count, loff_t *pos) |
1da177e4 | 328 | { |
4be44fcd | 329 | char debug_string[12] = { '\0' }; |
1da177e4 | 330 | |
1da177e4 LT |
331 | |
332 | if (count > sizeof(debug_string) - 1) | |
d550d98d | 333 | return -EINVAL; |
1da177e4 LT |
334 | |
335 | if (copy_from_user(debug_string, buffer, count)) | |
d550d98d | 336 | return -EFAULT; |
1da177e4 LT |
337 | |
338 | debug_string[count] = '\0'; | |
339 | ||
7d7decb2 | 340 | switch ((unsigned long)PDE(file->f_path.dentry->d_inode)->data) { |
1da177e4 LT |
341 | case 0: |
342 | acpi_dbg_layer = simple_strtoul(debug_string, NULL, 0); | |
343 | break; | |
344 | case 1: | |
345 | acpi_dbg_level = simple_strtoul(debug_string, NULL, 0); | |
346 | break; | |
347 | default: | |
d550d98d | 348 | return -EINVAL; |
1da177e4 LT |
349 | } |
350 | ||
d550d98d | 351 | return count; |
1da177e4 | 352 | } |
7d7decb2 AD |
353 | |
354 | static const struct file_operations acpi_system_debug_proc_fops = { | |
355 | .owner = THIS_MODULE, | |
356 | .open = acpi_system_debug_proc_open, | |
357 | .read = seq_read, | |
358 | .llseek = seq_lseek, | |
359 | .release = single_release, | |
360 | .write = acpi_system_debug_proc_write, | |
361 | }; | |
84f810c3 | 362 | #endif |
1da177e4 | 363 | |
a1a541d8 | 364 | int __init acpi_procfs_init(void) |
1da177e4 | 365 | { |
84f810c3 | 366 | #ifdef CONFIG_ACPI_PROCFS |
4be44fcd | 367 | struct proc_dir_entry *entry; |
1da177e4 | 368 | int error = 0; |
4be44fcd | 369 | char *name; |
1da177e4 | 370 | |
1da177e4 LT |
371 | /* 'debug_layer' [R/W] */ |
372 | name = ACPI_SYSTEM_FILE_DEBUG_LAYER; | |
7d7decb2 AD |
373 | entry = proc_create_data(name, S_IFREG | S_IRUGO | S_IWUSR, |
374 | acpi_root_dir, &acpi_system_debug_proc_fops, | |
375 | (void *)0); | |
376 | if (!entry) | |
1da177e4 LT |
377 | goto Error; |
378 | ||
379 | /* 'debug_level' [R/W] */ | |
380 | name = ACPI_SYSTEM_FILE_DEBUG_LEVEL; | |
7d7decb2 AD |
381 | entry = proc_create_data(name, S_IFREG | S_IRUGO | S_IWUSR, |
382 | acpi_root_dir, &acpi_system_debug_proc_fops, | |
383 | (void *)1); | |
384 | if (!entry) | |
1da177e4 LT |
385 | goto Error; |
386 | ||
4be44fcd | 387 | Done: |
d550d98d | 388 | return error; |
1da177e4 | 389 | |
4be44fcd | 390 | Error: |
1da177e4 LT |
391 | remove_proc_entry(ACPI_SYSTEM_FILE_DEBUG_LEVEL, acpi_root_dir); |
392 | remove_proc_entry(ACPI_SYSTEM_FILE_DEBUG_LAYER, acpi_root_dir); | |
a6fc6720 | 393 | error = -ENODEV; |
1da177e4 | 394 | goto Done; |
84f810c3 BH |
395 | #else |
396 | return 0; | |
219c3c8e | 397 | #endif |
84f810c3 | 398 | } |
a1a541d8 ZR |
399 | |
400 | int __init acpi_debug_init(void) | |
401 | { | |
402 | acpi_debugfs_init(); | |
403 | acpi_procfs_init(); | |
404 | return 0; | |
405 | } |