Pull dock-bay into release branch
[linux-3.10.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 /* --------------------------------------------------------------------------
134                               FS Interface (/proc)
135    -------------------------------------------------------------------------- */
136 #ifdef CONFIG_ACPI_PROCFS
137 #define ACPI_SYSTEM_FILE_DEBUG_LAYER    "debug_layer"
138 #define ACPI_SYSTEM_FILE_DEBUG_LEVEL            "debug_level"
139
140 static int
141 acpi_system_read_debug(char *page,
142                        char **start, off_t off, int count, int *eof, void *data)
143 {
144         char *p = page;
145         int size = 0;
146         unsigned int i;
147
148         if (off != 0)
149                 goto end;
150
151         p += sprintf(p, "%-25s\tHex        SET\n", "Description");
152
153         switch ((unsigned long)data) {
154         case 0:
155                 for (i = 0; i < ARRAY_SIZE(acpi_debug_layers); i++) {
156                         p += sprintf(p, "%-25s\t0x%08lX [%c]\n",
157                                      acpi_debug_layers[i].name,
158                                      acpi_debug_layers[i].value,
159                                      (acpi_dbg_layer & acpi_debug_layers[i].
160                                       value) ? '*' : ' ');
161                 }
162                 p += sprintf(p, "%-25s\t0x%08X [%c]\n", "ACPI_ALL_DRIVERS",
163                              ACPI_ALL_DRIVERS,
164                              (acpi_dbg_layer & ACPI_ALL_DRIVERS) ==
165                              ACPI_ALL_DRIVERS ? '*' : (acpi_dbg_layer &
166                                                        ACPI_ALL_DRIVERS) ==
167                              0 ? ' ' : '-');
168                 p += sprintf(p,
169                              "--\ndebug_layer = 0x%08X (* = enabled, - = partial)\n",
170                              acpi_dbg_layer);
171                 break;
172         case 1:
173                 for (i = 0; i < ARRAY_SIZE(acpi_debug_levels); i++) {
174                         p += sprintf(p, "%-25s\t0x%08lX [%c]\n",
175                                      acpi_debug_levels[i].name,
176                                      acpi_debug_levels[i].value,
177                                      (acpi_dbg_level & acpi_debug_levels[i].
178                                       value) ? '*' : ' ');
179                 }
180                 p += sprintf(p, "--\ndebug_level = 0x%08X (* = enabled)\n",
181                              acpi_dbg_level);
182                 break;
183         default:
184                 p += sprintf(p, "Invalid debug option\n");
185                 break;
186         }
187
188       end:
189         size = (p - page);
190         if (size <= off + count)
191                 *eof = 1;
192         *start = page + off;
193         size -= off;
194         if (size > count)
195                 size = count;
196         if (size < 0)
197                 size = 0;
198
199         return size;
200 }
201
202 static int
203 acpi_system_write_debug(struct file *file,
204                         const char __user * buffer,
205                         unsigned long count, void *data)
206 {
207         char debug_string[12] = { '\0' };
208
209
210         if (count > sizeof(debug_string) - 1)
211                 return -EINVAL;
212
213         if (copy_from_user(debug_string, buffer, count))
214                 return -EFAULT;
215
216         debug_string[count] = '\0';
217
218         switch ((unsigned long)data) {
219         case 0:
220                 acpi_dbg_layer = simple_strtoul(debug_string, NULL, 0);
221                 break;
222         case 1:
223                 acpi_dbg_level = simple_strtoul(debug_string, NULL, 0);
224                 break;
225         default:
226                 return -EINVAL;
227         }
228
229         return count;
230 }
231
232 static int __init acpi_debug_init(void)
233 {
234         struct proc_dir_entry *entry;
235         int error = 0;
236         char *name;
237
238
239         if (acpi_disabled)
240                 return 0;
241
242         /* 'debug_layer' [R/W] */
243         name = ACPI_SYSTEM_FILE_DEBUG_LAYER;
244         entry =
245             create_proc_read_entry(name, S_IFREG | S_IRUGO | S_IWUSR,
246                                    acpi_root_dir, acpi_system_read_debug,
247                                    (void *)0);
248         if (entry)
249                 entry->write_proc = acpi_system_write_debug;
250         else
251                 goto Error;
252
253         /* 'debug_level' [R/W] */
254         name = ACPI_SYSTEM_FILE_DEBUG_LEVEL;
255         entry =
256             create_proc_read_entry(name, S_IFREG | S_IRUGO | S_IWUSR,
257                                    acpi_root_dir, acpi_system_read_debug,
258                                    (void *)1);
259         if (entry)
260                 entry->write_proc = acpi_system_write_debug;
261         else
262                 goto Error;
263
264       Done:
265         return error;
266
267       Error:
268         remove_proc_entry(ACPI_SYSTEM_FILE_DEBUG_LEVEL, acpi_root_dir);
269         remove_proc_entry(ACPI_SYSTEM_FILE_DEBUG_LAYER, acpi_root_dir);
270         error = -ENODEV;
271         goto Done;
272 }
273
274 subsys_initcall(acpi_debug_init);
275 #endif