projects/linux·blob v2.6.21 · refs

275 lines · 7.2 KiB

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
15ACPI_MODULE_NAME("debug");
16
17#ifdef MODULE_PARAM_PREFIX
18#undef MODULE_PARAM_PREFIX
19#endif
20#define MODULE_PARAM_PREFIX "acpi."
21
22struct acpi_dlayer {
23 const char *name;
24 unsigned long value;
25};
26struct acpi_dlevel {
27 const char *name;
28 unsigned long value;
29};
30#define ACPI_DEBUG_INIT(v) { .name = #v, .value = v }
31
32static 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
49static 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 -------------------------------------------------------------------------- */
89static 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
111static 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
130module_param_call(debug_layer, param_set_uint, param_get_debug_layer, &acpi_dbg_layer, 0644);
131module_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
140static int
141acpi_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
202static int
203acpi_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
232static 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
274subsys_initcall(acpi_debug_init);
275#endif