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 | |
4be44fcd | 15 | ACPI_MODULE_NAME("debug") |
1da177e4 LT |
16 | #define ACPI_SYSTEM_FILE_DEBUG_LAYER "debug_layer" |
17 | #define ACPI_SYSTEM_FILE_DEBUG_LEVEL "debug_level" | |
1da177e4 LT |
18 | #ifdef MODULE_PARAM_PREFIX |
19 | #undef MODULE_PARAM_PREFIX | |
20 | #endif | |
1da177e4 | 21 | #define MODULE_PARAM_PREFIX |
4be44fcd | 22 | module_param(acpi_dbg_layer, uint, 0400); |
1da177e4 LT |
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 | ||
4be44fcd | 35 | static const struct acpi_dlayer acpi_debug_layers[] = { |
1da177e4 LT |
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 | ||
4be44fcd | 52 | static const struct acpi_dlevel acpi_debug_levels[] = { |
1da177e4 LT |
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), | |
4be44fcd | 86 | ACPI_DEBUG_INIT(ACPI_LV_EVENTS), |
1da177e4 LT |
87 | }; |
88 | ||
89 | static int | |
4be44fcd LB |
90 | acpi_system_read_debug(char *page, |
91 | char **start, off_t off, int count, int *eof, void *data) | |
1da177e4 | 92 | { |
4be44fcd LB |
93 | char *p = page; |
94 | int size = 0; | |
95 | unsigned int i; | |
1da177e4 LT |
96 | |
97 | if (off != 0) | |
98 | goto end; | |
99 | ||
100 | p += sprintf(p, "%-25s\tHex SET\n", "Description"); | |
101 | ||
4be44fcd | 102 | switch ((unsigned long)data) { |
1da177e4 LT |
103 | case 0: |
104 | for (i = 0; i < ARRAY_SIZE(acpi_debug_layers); i++) { | |
105 | p += sprintf(p, "%-25s\t0x%08lX [%c]\n", | |
4be44fcd LB |
106 | acpi_debug_layers[i].name, |
107 | acpi_debug_layers[i].value, | |
108 | (acpi_dbg_layer & acpi_debug_layers[i]. | |
109 | value) ? '*' : ' '); | |
1da177e4 LT |
110 | } |
111 | p += sprintf(p, "%-25s\t0x%08X [%c]\n", "ACPI_ALL_DRIVERS", | |
4be44fcd LB |
112 | ACPI_ALL_DRIVERS, |
113 | (acpi_dbg_layer & ACPI_ALL_DRIVERS) == | |
114 | ACPI_ALL_DRIVERS ? '*' : (acpi_dbg_layer & | |
115 | ACPI_ALL_DRIVERS) == | |
116 | 0 ? ' ' : '-'); | |
1da177e4 | 117 | p += sprintf(p, |
4be44fcd LB |
118 | "--\ndebug_layer = 0x%08X (* = enabled, - = partial)\n", |
119 | acpi_dbg_layer); | |
1da177e4 LT |
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", | |
4be44fcd LB |
124 | acpi_debug_levels[i].name, |
125 | acpi_debug_levels[i].value, | |
126 | (acpi_dbg_level & acpi_debug_levels[i]. | |
127 | value) ? '*' : ' '); | |
1da177e4 LT |
128 | } |
129 | p += sprintf(p, "--\ndebug_level = 0x%08X (* = enabled)\n", | |
4be44fcd | 130 | acpi_dbg_level); |
1da177e4 LT |
131 | break; |
132 | default: | |
133 | p += sprintf(p, "Invalid debug option\n"); | |
134 | break; | |
135 | } | |
4be44fcd LB |
136 | |
137 | end: | |
1da177e4 | 138 | size = (p - page); |
4be44fcd LB |
139 | if (size <= off + count) |
140 | *eof = 1; | |
1da177e4 LT |
141 | *start = page + off; |
142 | size -= off; | |
4be44fcd LB |
143 | if (size > count) |
144 | size = count; | |
145 | if (size < 0) | |
146 | size = 0; | |
1da177e4 LT |
147 | |
148 | return size; | |
149 | } | |
150 | ||
1da177e4 | 151 | static int |
4be44fcd LB |
152 | acpi_system_write_debug(struct file *file, |
153 | const char __user * buffer, | |
154 | unsigned long count, void *data) | |
1da177e4 | 155 | { |
4be44fcd | 156 | char debug_string[12] = { '\0' }; |
1da177e4 LT |
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 | ||
4be44fcd | 168 | switch ((unsigned long)data) { |
1da177e4 LT |
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 | { | |
4be44fcd | 184 | struct proc_dir_entry *entry; |
1da177e4 | 185 | int error = 0; |
4be44fcd | 186 | char *name; |
1da177e4 LT |
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; | |
4be44fcd LB |
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); | |
1da177e4 LT |
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; | |
4be44fcd LB |
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) | |
1da177e4 LT |
211 | entry->write_proc = acpi_system_write_debug; |
212 | else | |
213 | goto Error; | |
214 | ||
4be44fcd | 215 | Done: |
1da177e4 LT |
216 | return_VALUE(error); |
217 | ||
4be44fcd LB |
218 | Error: |
219 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, | |
220 | "Unable to create '%s' proc fs entry\n", name)); | |
1da177e4 LT |
221 | |
222 | remove_proc_entry(ACPI_SYSTEM_FILE_DEBUG_LEVEL, acpi_root_dir); | |
223 | remove_proc_entry(ACPI_SYSTEM_FILE_DEBUG_LAYER, acpi_root_dir); | |
224 | error = -EFAULT; | |
225 | goto Done; | |
226 | } | |
227 | ||
228 | subsys_initcall(acpi_debug_init); |