6df564f4ca6ed4bf48c1284f3c7d2807986b1f77
[linux-2.6.git] / drivers / acpi / debug.c
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
15 ACPI_MODULE_NAME("debug");
16
17 #ifdef MODULE_PARAM_PREFIX
18 #undef MODULE_PARAM_PREFIX
19 #endif
20 #define MODULE_PARAM_PREFIX "acpi."
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
32 static const struct acpi_dlayer acpi_debug_layers[] = {
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
49 static const struct acpi_dlevel acpi_debug_levels[] = {
50         ACPI_DEBUG_INIT(ACPI_LV_ERROR),
51         ACPI_DEBUG_INIT(ACPI_LV_WARN),
52         ACPI_DEBUG_INIT(ACPI_LV_INIT),
53         ACPI_DEBUG_INIT(ACPI_LV_DEBUG_OBJECT),
54         ACPI_DEBUG_INIT(ACPI_LV_INFO),
55
56         ACPI_DEBUG_INIT(ACPI_LV_INIT_NAMES),
57         ACPI_DEBUG_INIT(ACPI_LV_PARSE),
58         ACPI_DEBUG_INIT(ACPI_LV_LOAD),
59         ACPI_DEBUG_INIT(ACPI_LV_DISPATCH),
60         ACPI_DEBUG_INIT(ACPI_LV_EXEC),
61         ACPI_DEBUG_INIT(ACPI_LV_NAMES),
62         ACPI_DEBUG_INIT(ACPI_LV_OPREGION),
63         ACPI_DEBUG_INIT(ACPI_LV_BFIELD),
64         ACPI_DEBUG_INIT(ACPI_LV_TABLES),
65         ACPI_DEBUG_INIT(ACPI_LV_VALUES),
66         ACPI_DEBUG_INIT(ACPI_LV_OBJECTS),
67         ACPI_DEBUG_INIT(ACPI_LV_RESOURCES),
68         ACPI_DEBUG_INIT(ACPI_LV_USER_REQUESTS),
69         ACPI_DEBUG_INIT(ACPI_LV_PACKAGE),
70
71         ACPI_DEBUG_INIT(ACPI_LV_ALLOCATIONS),
72         ACPI_DEBUG_INIT(ACPI_LV_FUNCTIONS),
73         ACPI_DEBUG_INIT(ACPI_LV_OPTIMIZATIONS),
74
75         ACPI_DEBUG_INIT(ACPI_LV_MUTEX),
76         ACPI_DEBUG_INIT(ACPI_LV_THREADS),
77         ACPI_DEBUG_INIT(ACPI_LV_IO),
78         ACPI_DEBUG_INIT(ACPI_LV_INTERRUPTS),
79
80         ACPI_DEBUG_INIT(ACPI_LV_AML_DISASSEMBLE),
81         ACPI_DEBUG_INIT(ACPI_LV_VERBOSE_INFO),
82         ACPI_DEBUG_INIT(ACPI_LV_FULL_TABLES),
83         ACPI_DEBUG_INIT(ACPI_LV_EVENTS),
84 };
85
86 /* --------------------------------------------------------------------------
87                               FS Interface (/sys)
88    -------------------------------------------------------------------------- */
89 static int param_get_debug_layer(char *buffer, struct kernel_param *kp) {
90         int result = 0;
91         int i;
92
93         result = sprintf(buffer, "%-25s\tHex        SET\n", "Description");
94
95         for(i = 0; i <ARRAY_SIZE(acpi_debug_layers); i++) {
96                 result += sprintf(buffer+result, "%-25s\t0x%08lX [%c]\n",
97                                         acpi_debug_layers[i].name,
98                                         acpi_debug_layers[i].value,
99                                         (acpi_dbg_layer & acpi_debug_layers[i].value) ? '*' : ' ');
100         }
101         result += sprintf(buffer+result, "%-25s\t0x%08X [%c]\n", "ACPI_ALL_DRIVERS",
102                                         ACPI_ALL_DRIVERS,
103                                         (acpi_dbg_layer & ACPI_ALL_DRIVERS) ==
104                                         ACPI_ALL_DRIVERS ? '*' : (acpi_dbg_layer &
105                                         ACPI_ALL_DRIVERS) == 0 ? ' ' : '-');
106         result += sprintf(buffer+result, "--\ndebug_layer = 0x%08X ( * = enabled)\n", acpi_dbg_layer);
107
108         return result;
109 }
110
111 static int param_get_debug_level(char *buffer, struct kernel_param *kp) {
112         int result = 0;
113         int i;
114
115         result = sprintf(buffer, "%-25s\tHex        SET\n", "Description");
116
117         for (i = 0; i < ARRAY_SIZE(acpi_debug_levels); i++) {
118                 result += sprintf(buffer+result, "%-25s\t0x%08lX [%c]\n",
119                                      acpi_debug_levels[i].name,
120                                      acpi_debug_levels[i].value,
121                                      (acpi_dbg_level & acpi_debug_levels[i].
122                                       value) ? '*' : ' ');
123         }
124         result += sprintf(buffer+result, "--\ndebug_level = 0x%08X (* = enabled)\n",
125                              acpi_dbg_level);
126
127         return result;
128 }
129
130 module_param_call(debug_layer, param_set_uint, param_get_debug_layer, &acpi_dbg_layer, 0644);
131 module_param_call(debug_level, param_set_uint, param_get_debug_level, &acpi_dbg_level, 0644);
132
133 static char trace_method_name[6];
134 module_param_string(trace_method_name, trace_method_name, 6, 0644);
135 static unsigned int trace_debug_layer;
136 module_param(trace_debug_layer, uint, 0644);
137 static unsigned int trace_debug_level;
138 module_param(trace_debug_level, uint, 0644);
139
140 static int param_set_trace_state(const char *val, struct kernel_param *kp)
141 {
142         int result = 0;
143
144         if (!strncmp(val, "enable", strlen("enable") - 1)) {
145                 result = acpi_debug_trace(trace_method_name, trace_debug_level,
146                                           trace_debug_layer, 0);
147                 if (result)
148                         result = -EBUSY;
149                 goto exit;
150         }
151
152         if (!strncmp(val, "disable", strlen("disable") - 1)) {
153                 int name = 0;
154                 result = acpi_debug_trace((char *)&name, trace_debug_level,
155                                           trace_debug_layer, 0);
156                 if (result)
157                         result = -EBUSY;
158                 goto exit;
159         }
160
161         if (!strncmp(val, "1", 1)) {
162                 result = acpi_debug_trace(trace_method_name, trace_debug_level,
163                                           trace_debug_layer, 1);
164                 if (result)
165                         result = -EBUSY;
166                 goto exit;
167         }
168
169         result = -EINVAL;
170 exit:
171         return result;
172 }
173
174 static int param_get_trace_state(char *buffer, struct kernel_param *kp)
175 {
176         if (!acpi_gbl_trace_method_name)
177                 return sprintf(buffer, "disable");
178         else {
179                 if (acpi_gbl_trace_flags & 1)
180                         return sprintf(buffer, "1");
181                 else
182                         return sprintf(buffer, "enable");
183         }
184         return 0;
185 }
186
187 module_param_call(trace_state, param_set_trace_state, param_get_trace_state,
188                   NULL, 0644);
189
190 /* --------------------------------------------------------------------------
191                               FS Interface (/proc)
192    -------------------------------------------------------------------------- */
193 #ifdef CONFIG_ACPI_PROCFS
194 #define ACPI_SYSTEM_FILE_DEBUG_LAYER    "debug_layer"
195 #define ACPI_SYSTEM_FILE_DEBUG_LEVEL            "debug_level"
196
197 static int
198 acpi_system_read_debug(char *page,
199                        char **start, off_t off, int count, int *eof, void *data)
200 {
201         char *p = page;
202         int size = 0;
203         unsigned int i;
204
205         if (off != 0)
206                 goto end;
207
208         p += sprintf(p, "%-25s\tHex        SET\n", "Description");
209
210         switch ((unsigned long)data) {
211         case 0:
212                 for (i = 0; i < ARRAY_SIZE(acpi_debug_layers); i++) {
213                         p += sprintf(p, "%-25s\t0x%08lX [%c]\n",
214                                      acpi_debug_layers[i].name,
215                                      acpi_debug_layers[i].value,
216                                      (acpi_dbg_layer & acpi_debug_layers[i].
217                                       value) ? '*' : ' ');
218                 }
219                 p += sprintf(p, "%-25s\t0x%08X [%c]\n", "ACPI_ALL_DRIVERS",
220                              ACPI_ALL_DRIVERS,
221                              (acpi_dbg_layer & ACPI_ALL_DRIVERS) ==
222                              ACPI_ALL_DRIVERS ? '*' : (acpi_dbg_layer &
223                                                        ACPI_ALL_DRIVERS) ==
224                              0 ? ' ' : '-');
225                 p += sprintf(p,
226                              "--\ndebug_layer = 0x%08X (* = enabled, - = partial)\n",
227                              acpi_dbg_layer);
228                 break;
229         case 1:
230                 for (i = 0; i < ARRAY_SIZE(acpi_debug_levels); i++) {
231                         p += sprintf(p, "%-25s\t0x%08lX [%c]\n",
232                                      acpi_debug_levels[i].name,
233                                      acpi_debug_levels[i].value,
234                                      (acpi_dbg_level & acpi_debug_levels[i].
235                                       value) ? '*' : ' ');
236                 }
237                 p += sprintf(p, "--\ndebug_level = 0x%08X (* = enabled)\n",
238                              acpi_dbg_level);
239                 break;
240         default:
241                 p += sprintf(p, "Invalid debug option\n");
242                 break;
243         }
244
245       end:
246         size = (p - page);
247         if (size <= off + count)
248                 *eof = 1;
249         *start = page + off;
250         size -= off;
251         if (size > count)
252                 size = count;
253         if (size < 0)
254                 size = 0;
255
256         return size;
257 }
258
259 static int
260 acpi_system_write_debug(struct file *file,
261                         const char __user * buffer,
262                         unsigned long count, void *data)
263 {
264         char debug_string[12] = { '\0' };
265
266
267         if (count > sizeof(debug_string) - 1)
268                 return -EINVAL;
269
270         if (copy_from_user(debug_string, buffer, count))
271                 return -EFAULT;
272
273         debug_string[count] = '\0';
274
275         switch ((unsigned long)data) {
276         case 0:
277                 acpi_dbg_layer = simple_strtoul(debug_string, NULL, 0);
278                 break;
279         case 1:
280                 acpi_dbg_level = simple_strtoul(debug_string, NULL, 0);
281                 break;
282         default:
283                 return -EINVAL;
284         }
285
286         return count;
287 }
288
289 static int __init acpi_debug_init(void)
290 {
291         struct proc_dir_entry *entry;
292         int error = 0;
293         char *name;
294
295
296         if (acpi_disabled)
297                 return 0;
298
299         /* 'debug_layer' [R/W] */
300         name = ACPI_SYSTEM_FILE_DEBUG_LAYER;
301         entry =
302             create_proc_read_entry(name, S_IFREG | S_IRUGO | S_IWUSR,
303                                    acpi_root_dir, acpi_system_read_debug,
304                                    (void *)0);
305         if (entry)
306                 entry->write_proc = acpi_system_write_debug;
307         else
308                 goto Error;
309
310         /* 'debug_level' [R/W] */
311         name = ACPI_SYSTEM_FILE_DEBUG_LEVEL;
312         entry =
313             create_proc_read_entry(name, S_IFREG | S_IRUGO | S_IWUSR,
314                                    acpi_root_dir, acpi_system_read_debug,
315                                    (void *)1);
316         if (entry)
317                 entry->write_proc = acpi_system_write_debug;
318         else
319                 goto Error;
320
321       Done:
322         return error;
323
324       Error:
325         remove_proc_entry(ACPI_SYSTEM_FILE_DEBUG_LEVEL, acpi_root_dir);
326         remove_proc_entry(ACPI_SYSTEM_FILE_DEBUG_LAYER, acpi_root_dir);
327         error = -ENODEV;
328         goto Done;
329 }
330
331 subsys_initcall(acpi_debug_init);
332 #endif