ec7bcee7708501135a97a7468947e2df535e560b
[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 #define ACPI_SYSTEM_FILE_DEBUG_LAYER    "debug_layer"
17 #define ACPI_SYSTEM_FILE_DEBUG_LEVEL    "debug_level"
18 #ifdef MODULE_PARAM_PREFIX
19 #undef MODULE_PARAM_PREFIX
20 #endif
21 #define MODULE_PARAM_PREFIX
22     module_param(acpi_dbg_layer, uint, 0400);
23 module_param(acpi_dbg_level, uint, 0400);
24
25 struct acpi_dlayer {
26         const char *name;
27         unsigned long value;
28 };
29 struct acpi_dlevel {
30         const char *name;
31         unsigned long value;
32 };
33 #define ACPI_DEBUG_INIT(v)      { .name = #v, .value = v }
34
35 static const struct acpi_dlayer acpi_debug_layers[] = {
36         ACPI_DEBUG_INIT(ACPI_UTILITIES),
37         ACPI_DEBUG_INIT(ACPI_HARDWARE),
38         ACPI_DEBUG_INIT(ACPI_EVENTS),
39         ACPI_DEBUG_INIT(ACPI_TABLES),
40         ACPI_DEBUG_INIT(ACPI_NAMESPACE),
41         ACPI_DEBUG_INIT(ACPI_PARSER),
42         ACPI_DEBUG_INIT(ACPI_DISPATCHER),
43         ACPI_DEBUG_INIT(ACPI_EXECUTER),
44         ACPI_DEBUG_INIT(ACPI_RESOURCES),
45         ACPI_DEBUG_INIT(ACPI_CA_DEBUGGER),
46         ACPI_DEBUG_INIT(ACPI_OS_SERVICES),
47         ACPI_DEBUG_INIT(ACPI_CA_DISASSEMBLER),
48         ACPI_DEBUG_INIT(ACPI_COMPILER),
49         ACPI_DEBUG_INIT(ACPI_TOOLS),
50 };
51
52 static const struct acpi_dlevel acpi_debug_levels[] = {
53         ACPI_DEBUG_INIT(ACPI_LV_ERROR),
54         ACPI_DEBUG_INIT(ACPI_LV_WARN),
55         ACPI_DEBUG_INIT(ACPI_LV_INIT),
56         ACPI_DEBUG_INIT(ACPI_LV_DEBUG_OBJECT),
57         ACPI_DEBUG_INIT(ACPI_LV_INFO),
58
59         ACPI_DEBUG_INIT(ACPI_LV_INIT_NAMES),
60         ACPI_DEBUG_INIT(ACPI_LV_PARSE),
61         ACPI_DEBUG_INIT(ACPI_LV_LOAD),
62         ACPI_DEBUG_INIT(ACPI_LV_DISPATCH),
63         ACPI_DEBUG_INIT(ACPI_LV_EXEC),
64         ACPI_DEBUG_INIT(ACPI_LV_NAMES),
65         ACPI_DEBUG_INIT(ACPI_LV_OPREGION),
66         ACPI_DEBUG_INIT(ACPI_LV_BFIELD),
67         ACPI_DEBUG_INIT(ACPI_LV_TABLES),
68         ACPI_DEBUG_INIT(ACPI_LV_VALUES),
69         ACPI_DEBUG_INIT(ACPI_LV_OBJECTS),
70         ACPI_DEBUG_INIT(ACPI_LV_RESOURCES),
71         ACPI_DEBUG_INIT(ACPI_LV_USER_REQUESTS),
72         ACPI_DEBUG_INIT(ACPI_LV_PACKAGE),
73
74         ACPI_DEBUG_INIT(ACPI_LV_ALLOCATIONS),
75         ACPI_DEBUG_INIT(ACPI_LV_FUNCTIONS),
76         ACPI_DEBUG_INIT(ACPI_LV_OPTIMIZATIONS),
77
78         ACPI_DEBUG_INIT(ACPI_LV_MUTEX),
79         ACPI_DEBUG_INIT(ACPI_LV_THREADS),
80         ACPI_DEBUG_INIT(ACPI_LV_IO),
81         ACPI_DEBUG_INIT(ACPI_LV_INTERRUPTS),
82
83         ACPI_DEBUG_INIT(ACPI_LV_AML_DISASSEMBLE),
84         ACPI_DEBUG_INIT(ACPI_LV_VERBOSE_INFO),
85         ACPI_DEBUG_INIT(ACPI_LV_FULL_TABLES),
86         ACPI_DEBUG_INIT(ACPI_LV_EVENTS),
87 };
88
89 static int
90 acpi_system_read_debug(char *page,
91                        char **start, off_t off, int count, int *eof, void *data)
92 {
93         char *p = page;
94         int size = 0;
95         unsigned int i;
96
97         if (off != 0)
98                 goto end;
99
100         p += sprintf(p, "%-25s\tHex        SET\n", "Description");
101
102         switch ((unsigned long)data) {
103         case 0:
104                 for (i = 0; i < ARRAY_SIZE(acpi_debug_layers); i++) {
105                         p += sprintf(p, "%-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].
109                                       value) ? '*' : ' ');
110                 }
111                 p += sprintf(p, "%-25s\t0x%08X [%c]\n", "ACPI_ALL_DRIVERS",
112                              ACPI_ALL_DRIVERS,
113                              (acpi_dbg_layer & ACPI_ALL_DRIVERS) ==
114                              ACPI_ALL_DRIVERS ? '*' : (acpi_dbg_layer &
115                                                        ACPI_ALL_DRIVERS) ==
116                              0 ? ' ' : '-');
117                 p += sprintf(p,
118                              "--\ndebug_layer = 0x%08X (* = enabled, - = partial)\n",
119                              acpi_dbg_layer);
120                 break;
121         case 1:
122                 for (i = 0; i < ARRAY_SIZE(acpi_debug_levels); i++) {
123                         p += sprintf(p, "%-25s\t0x%08lX [%c]\n",
124                                      acpi_debug_levels[i].name,
125                                      acpi_debug_levels[i].value,
126                                      (acpi_dbg_level & acpi_debug_levels[i].
127                                       value) ? '*' : ' ');
128                 }
129                 p += sprintf(p, "--\ndebug_level = 0x%08X (* = enabled)\n",
130                              acpi_dbg_level);
131                 break;
132         default:
133                 p += sprintf(p, "Invalid debug option\n");
134                 break;
135         }
136
137       end:
138         size = (p - page);
139         if (size <= off + count)
140                 *eof = 1;
141         *start = page + off;
142         size -= off;
143         if (size > count)
144                 size = count;
145         if (size < 0)
146                 size = 0;
147
148         return size;
149 }
150
151 static int
152 acpi_system_write_debug(struct file *file,
153                         const char __user * buffer,
154                         unsigned long count, void *data)
155 {
156         char debug_string[12] = { '\0' };
157
158         ACPI_FUNCTION_TRACE("acpi_system_write_debug");
159
160         if (count > sizeof(debug_string) - 1)
161                 return_VALUE(-EINVAL);
162
163         if (copy_from_user(debug_string, buffer, count))
164                 return_VALUE(-EFAULT);
165
166         debug_string[count] = '\0';
167
168         switch ((unsigned long)data) {
169         case 0:
170                 acpi_dbg_layer = simple_strtoul(debug_string, NULL, 0);
171                 break;
172         case 1:
173                 acpi_dbg_level = simple_strtoul(debug_string, NULL, 0);
174                 break;
175         default:
176                 return_VALUE(-EINVAL);
177         }
178
179         return_VALUE(count);
180 }
181
182 static int __init acpi_debug_init(void)
183 {
184         struct proc_dir_entry *entry;
185         int error = 0;
186         char *name;
187
188         ACPI_FUNCTION_TRACE("acpi_debug_init");
189
190         if (acpi_disabled)
191                 return_VALUE(0);
192
193         /* 'debug_layer' [R/W] */
194         name = ACPI_SYSTEM_FILE_DEBUG_LAYER;
195         entry =
196             create_proc_read_entry(name, S_IFREG | S_IRUGO | S_IWUSR,
197                                    acpi_root_dir, acpi_system_read_debug,
198                                    (void *)0);
199         if (entry)
200                 entry->write_proc = acpi_system_write_debug;
201         else
202                 goto Error;
203
204         /* 'debug_level' [R/W] */
205         name = ACPI_SYSTEM_FILE_DEBUG_LEVEL;
206         entry =
207             create_proc_read_entry(name, S_IFREG | S_IRUGO | S_IWUSR,
208                                    acpi_root_dir, acpi_system_read_debug,
209                                    (void *)1);
210         if (entry)
211                 entry->write_proc = acpi_system_write_debug;
212         else
213                 goto Error;
214
215       Done:
216         return_VALUE(error);
217
218       Error:
219         remove_proc_entry(ACPI_SYSTEM_FILE_DEBUG_LEVEL, acpi_root_dir);
220         remove_proc_entry(ACPI_SYSTEM_FILE_DEBUG_LAYER, acpi_root_dir);
221         error = -ENODEV;
222         goto Done;
223 }
224
225 subsys_initcall(acpi_debug_init);