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