Merge branch 'sony' into release
[linux-2.6] / 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         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),
62 };
63
64 static const struct acpi_dlevel acpi_debug_levels[] = {
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),
96         ACPI_DEBUG_INIT(ACPI_LV_EVENTS),
97 };
98
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
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
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
210 static int
211 acpi_system_read_debug(char *page,
212                        char **start, off_t off, int count, int *eof, void *data)
213 {
214         char *p = page;
215         int size = 0;
216         unsigned int i;
217
218         if (off != 0)
219                 goto end;
220
221         p += sprintf(p, "%-25s\tHex        SET\n", "Description");
222
223         switch ((unsigned long)data) {
224         case 0:
225                 for (i = 0; i < ARRAY_SIZE(acpi_debug_layers); i++) {
226                         p += sprintf(p, "%-25s\t0x%08lX [%c]\n",
227                                      acpi_debug_layers[i].name,
228                                      acpi_debug_layers[i].value,
229                                      (acpi_dbg_layer & acpi_debug_layers[i].
230                                       value) ? '*' : ' ');
231                 }
232                 p += sprintf(p, "%-25s\t0x%08X [%c]\n", "ACPI_ALL_DRIVERS",
233                              ACPI_ALL_DRIVERS,
234                              (acpi_dbg_layer & ACPI_ALL_DRIVERS) ==
235                              ACPI_ALL_DRIVERS ? '*' : (acpi_dbg_layer &
236                                                        ACPI_ALL_DRIVERS) ==
237                              0 ? ' ' : '-');
238                 p += sprintf(p,
239                              "--\ndebug_layer = 0x%08X (* = enabled, - = partial)\n",
240                              acpi_dbg_layer);
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",
245                                      acpi_debug_levels[i].name,
246                                      acpi_debug_levels[i].value,
247                                      (acpi_dbg_level & acpi_debug_levels[i].
248                                       value) ? '*' : ' ');
249                 }
250                 p += sprintf(p, "--\ndebug_level = 0x%08X (* = enabled)\n",
251                              acpi_dbg_level);
252                 break;
253         default:
254                 p += sprintf(p, "Invalid debug option\n");
255                 break;
256         }
257
258       end:
259         size = (p - page);
260         if (size <= off + count)
261                 *eof = 1;
262         *start = page + off;
263         size -= off;
264         if (size > count)
265                 size = count;
266         if (size < 0)
267                 size = 0;
268
269         return size;
270 }
271
272 static int
273 acpi_system_write_debug(struct file *file,
274                         const char __user * buffer,
275                         unsigned long count, void *data)
276 {
277         char debug_string[12] = { '\0' };
278
279
280         if (count > sizeof(debug_string) - 1)
281                 return -EINVAL;
282
283         if (copy_from_user(debug_string, buffer, count))
284                 return -EFAULT;
285
286         debug_string[count] = '\0';
287
288         switch ((unsigned long)data) {
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:
296                 return -EINVAL;
297         }
298
299         return count;
300 }
301
302 static int __init acpi_debug_init(void)
303 {
304         struct proc_dir_entry *entry;
305         int error = 0;
306         char *name;
307
308
309         if (acpi_disabled)
310                 return 0;
311
312         /* 'debug_layer' [R/W] */
313         name = ACPI_SYSTEM_FILE_DEBUG_LAYER;
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);
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;
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)
330                 entry->write_proc = acpi_system_write_debug;
331         else
332                 goto Error;
333
334       Done:
335         return error;
336
337       Error:
338         remove_proc_entry(ACPI_SYSTEM_FILE_DEBUG_LEVEL, acpi_root_dir);
339         remove_proc_entry(ACPI_SYSTEM_FILE_DEBUG_LAYER, acpi_root_dir);
340         error = -ENODEV;
341         goto Done;
342 }
343
344 subsys_initcall(acpi_debug_init);
345 #endif