Commit | Line | Data |
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1da177e4 LT |
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); |