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 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 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);
234
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