Merge ../to-linus-stable/
[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 #define ACPI_SYSTEM_FILE_DEBUG_LAYER    "debug_layer"
18 #define ACPI_SYSTEM_FILE_DEBUG_LEVEL    "debug_level"
19
20 #ifdef MODULE_PARAM_PREFIX
21 #undef MODULE_PARAM_PREFIX
22 #endif
23
24 #define MODULE_PARAM_PREFIX
25 module_param(acpi_dbg_layer, uint, 0400);
26 module_param(acpi_dbg_level, uint, 0400);
27
28 struct acpi_dlayer {
29         const char *name;
30         unsigned long value;
31 };
32 struct acpi_dlevel {
33         const char *name;
34         unsigned long value;
35 };
36 #define ACPI_DEBUG_INIT(v)      { .name = #v, .value = v }
37
38 static const struct acpi_dlayer acpi_debug_layers[] =
39 {
40         ACPI_DEBUG_INIT(ACPI_UTILITIES),
41         ACPI_DEBUG_INIT(ACPI_HARDWARE),
42         ACPI_DEBUG_INIT(ACPI_EVENTS),
43         ACPI_DEBUG_INIT(ACPI_TABLES),
44         ACPI_DEBUG_INIT(ACPI_NAMESPACE),
45         ACPI_DEBUG_INIT(ACPI_PARSER),
46         ACPI_DEBUG_INIT(ACPI_DISPATCHER),
47         ACPI_DEBUG_INIT(ACPI_EXECUTER),
48         ACPI_DEBUG_INIT(ACPI_RESOURCES),
49         ACPI_DEBUG_INIT(ACPI_CA_DEBUGGER),
50         ACPI_DEBUG_INIT(ACPI_OS_SERVICES),
51         ACPI_DEBUG_INIT(ACPI_CA_DISASSEMBLER),
52         ACPI_DEBUG_INIT(ACPI_COMPILER),
53         ACPI_DEBUG_INIT(ACPI_TOOLS),
54 };
55
56 static const struct acpi_dlevel acpi_debug_levels[] =
57 {
58         ACPI_DEBUG_INIT(ACPI_LV_ERROR),
59         ACPI_DEBUG_INIT(ACPI_LV_WARN),
60         ACPI_DEBUG_INIT(ACPI_LV_INIT),
61         ACPI_DEBUG_INIT(ACPI_LV_DEBUG_OBJECT),
62         ACPI_DEBUG_INIT(ACPI_LV_INFO),
63
64         ACPI_DEBUG_INIT(ACPI_LV_INIT_NAMES),
65         ACPI_DEBUG_INIT(ACPI_LV_PARSE),
66         ACPI_DEBUG_INIT(ACPI_LV_LOAD),
67         ACPI_DEBUG_INIT(ACPI_LV_DISPATCH),
68         ACPI_DEBUG_INIT(ACPI_LV_EXEC),
69         ACPI_DEBUG_INIT(ACPI_LV_NAMES),
70         ACPI_DEBUG_INIT(ACPI_LV_OPREGION),
71         ACPI_DEBUG_INIT(ACPI_LV_BFIELD),
72         ACPI_DEBUG_INIT(ACPI_LV_TABLES),
73         ACPI_DEBUG_INIT(ACPI_LV_VALUES),
74         ACPI_DEBUG_INIT(ACPI_LV_OBJECTS),
75         ACPI_DEBUG_INIT(ACPI_LV_RESOURCES),
76         ACPI_DEBUG_INIT(ACPI_LV_USER_REQUESTS),
77         ACPI_DEBUG_INIT(ACPI_LV_PACKAGE),
78
79         ACPI_DEBUG_INIT(ACPI_LV_ALLOCATIONS),
80         ACPI_DEBUG_INIT(ACPI_LV_FUNCTIONS),
81         ACPI_DEBUG_INIT(ACPI_LV_OPTIMIZATIONS),
82
83         ACPI_DEBUG_INIT(ACPI_LV_MUTEX),
84         ACPI_DEBUG_INIT(ACPI_LV_THREADS),
85         ACPI_DEBUG_INIT(ACPI_LV_IO),
86         ACPI_DEBUG_INIT(ACPI_LV_INTERRUPTS),
87
88         ACPI_DEBUG_INIT(ACPI_LV_AML_DISASSEMBLE),
89         ACPI_DEBUG_INIT(ACPI_LV_VERBOSE_INFO),
90         ACPI_DEBUG_INIT(ACPI_LV_FULL_TABLES),
91         ACPI_DEBUG_INIT(ACPI_LV_EVENTS),             
92 };
93
94 static int
95 acpi_system_read_debug (
96         char                    *page,
97         char                    **start,
98         off_t                   off,
99         int                     count,
100         int                     *eof,
101         void                    *data)
102 {
103         char                    *p = page;
104         int                     size = 0;
105         unsigned int            i;
106
107         if (off != 0)
108                 goto end;
109
110         p += sprintf(p, "%-25s\tHex        SET\n", "Description");
111
112         switch ((unsigned long) data) {
113         case 0:
114                 for (i = 0; i < ARRAY_SIZE(acpi_debug_layers); i++) {
115                         p += sprintf(p, "%-25s\t0x%08lX [%c]\n",
116                                 acpi_debug_layers[i].name,
117                                 acpi_debug_layers[i].value,
118                                 (acpi_dbg_layer & acpi_debug_layers[i].value) ?
119                                 '*' : ' ');
120                 }
121                 p += sprintf(p, "%-25s\t0x%08X [%c]\n", "ACPI_ALL_DRIVERS",
122                         ACPI_ALL_DRIVERS,
123                         (acpi_dbg_layer & ACPI_ALL_DRIVERS) == ACPI_ALL_DRIVERS?
124                         '*' : (acpi_dbg_layer & ACPI_ALL_DRIVERS) == 0 ?
125                         ' ' : '-');
126                 p += sprintf(p,
127                         "--\ndebug_layer = 0x%08X (* = enabled, - = partial)\n",
128                         acpi_dbg_layer);
129                 break;
130         case 1:
131                 for (i = 0; i < ARRAY_SIZE(acpi_debug_levels); i++) {
132                         p += sprintf(p, "%-25s\t0x%08lX [%c]\n",
133                                 acpi_debug_levels[i].name,
134                                 acpi_debug_levels[i].value,
135                                 (acpi_dbg_level & acpi_debug_levels[i].value) ?
136                                 '*' : ' ');
137                 }
138                 p += sprintf(p, "--\ndebug_level = 0x%08X (* = enabled)\n",
139                                 acpi_dbg_level);
140                 break;
141         default:
142                 p += sprintf(p, "Invalid debug option\n");
143                 break;
144         }
145         
146 end:
147         size = (p - page);
148         if (size <= off+count) *eof = 1;
149         *start = page + off;
150         size -= off;
151         if (size>count) size = count;
152         if (size<0) size = 0;
153
154         return size;
155 }
156
157
158 static int
159 acpi_system_write_debug (
160         struct file             *file,
161         const char              __user *buffer,
162         unsigned long           count,
163         void                    *data)
164 {
165         char                    debug_string[12] = {'\0'};
166
167         ACPI_FUNCTION_TRACE("acpi_system_write_debug");
168
169         if (count > sizeof(debug_string) - 1)
170                 return_VALUE(-EINVAL);
171
172         if (copy_from_user(debug_string, buffer, count))
173                 return_VALUE(-EFAULT);
174
175         debug_string[count] = '\0';
176
177         switch ((unsigned long) data) {
178         case 0:
179                 acpi_dbg_layer = simple_strtoul(debug_string, NULL, 0);
180                 break;
181         case 1:
182                 acpi_dbg_level = simple_strtoul(debug_string, NULL, 0);
183                 break;
184         default:
185                 return_VALUE(-EINVAL);
186         }
187
188         return_VALUE(count);
189 }
190
191 static int __init acpi_debug_init(void)
192 {
193         struct proc_dir_entry   *entry;
194         int error = 0;
195         char * name;
196
197         ACPI_FUNCTION_TRACE("acpi_debug_init");
198
199         if (acpi_disabled)
200                 return_VALUE(0);
201
202         /* 'debug_layer' [R/W] */
203         name = ACPI_SYSTEM_FILE_DEBUG_LAYER;
204         entry = create_proc_read_entry(name, S_IFREG|S_IRUGO|S_IWUSR, acpi_root_dir,
205                                        acpi_system_read_debug,(void *)0);
206         if (entry)
207                 entry->write_proc = acpi_system_write_debug;
208         else
209                 goto Error;
210
211         /* 'debug_level' [R/W] */
212         name = ACPI_SYSTEM_FILE_DEBUG_LEVEL;
213         entry = create_proc_read_entry(name, S_IFREG|S_IRUGO|S_IWUSR, acpi_root_dir,
214                                        acpi_system_read_debug, (void *)1);
215         if (entry) 
216                 entry->write_proc = acpi_system_write_debug;
217         else
218                 goto Error;
219
220  Done:
221         return_VALUE(error);
222
223  Error:
224         ACPI_DEBUG_PRINT((ACPI_DB_ERROR, 
225                          "Unable to create '%s' proc fs entry\n", name));
226
227         remove_proc_entry(ACPI_SYSTEM_FILE_DEBUG_LEVEL, acpi_root_dir);
228         remove_proc_entry(ACPI_SYSTEM_FILE_DEBUG_LAYER, acpi_root_dir);
229         error = -EFAULT;
230         goto Done;
231 }
232
233 subsys_initcall(acpi_debug_init);