Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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
133static char trace_method_name[6];
134module_param_string(trace_method_name, trace_method_name, 6, 0644);
135static unsigned int trace_debug_layer;
136module_param(trace_debug_layer, uint, 0644);
137static unsigned int trace_debug_level;
138module_param(trace_debug_level, uint, 0644);
139
140static int param_set_trace_state(const char *val, struct kernel_param *kp)
141{
142 int result = 0;
143
144 if (!strncmp(val, "enable", strlen("enable") - 1)) {
145 result = acpi_debug_trace(trace_method_name, trace_debug_level,
146 trace_debug_layer, 0);
147 if (result)
148 result = -EBUSY;
149 goto exit;
150 }
151
152 if (!strncmp(val, "disable", strlen("disable") - 1)) {
153 int name = 0;
154 result = acpi_debug_trace((char *)&name, trace_debug_level,
155 trace_debug_layer, 0);
156 if (result)
157 result = -EBUSY;
158 goto exit;
159 }
160
161 if (!strncmp(val, "1", 1)) {
162 result = acpi_debug_trace(trace_method_name, trace_debug_level,
163 trace_debug_layer, 1);
164 if (result)
165 result = -EBUSY;
166 goto exit;
167 }
168
169 result = -EINVAL;
170exit:
171 return result;
172}
173
174static int param_get_trace_state(char *buffer, struct kernel_param *kp)
175{
176 if (!acpi_gbl_trace_method_name)
177 return sprintf(buffer, "disable");
178 else {
179 if (acpi_gbl_trace_flags & 1)
180 return sprintf(buffer, "1");
181 else
182 return sprintf(buffer, "enable");
183 }
184 return 0;
185}
186
187module_param_call(trace_state, param_set_trace_state, param_get_trace_state,
188 NULL, 0644);
189
190/* --------------------------------------------------------------------------
191 FS Interface (/proc)
192 -------------------------------------------------------------------------- */
193#ifdef CONFIG_ACPI_PROCFS
194#define ACPI_SYSTEM_FILE_DEBUG_LAYER "debug_layer"
195#define ACPI_SYSTEM_FILE_DEBUG_LEVEL "debug_level"
196
197static int
198acpi_system_read_debug(char *page,
199 char **start, off_t off, int count, int *eof, void *data)
200{
201 char *p = page;
202 int size = 0;
203 unsigned int i;
204
205 if (off != 0)
206 goto end;
207
208 p += sprintf(p, "%-25s\tHex SET\n", "Description");
209
210 switch ((unsigned long)data) {
211 case 0:
212 for (i = 0; i < ARRAY_SIZE(acpi_debug_layers); i++) {
213 p += sprintf(p, "%-25s\t0x%08lX [%c]\n",
214 acpi_debug_layers[i].name,
215 acpi_debug_layers[i].value,
216 (acpi_dbg_layer & acpi_debug_layers[i].
217 value) ? '*' : ' ');
218 }
219 p += sprintf(p, "%-25s\t0x%08X [%c]\n", "ACPI_ALL_DRIVERS",
220 ACPI_ALL_DRIVERS,
221 (acpi_dbg_layer & ACPI_ALL_DRIVERS) ==
222 ACPI_ALL_DRIVERS ? '*' : (acpi_dbg_layer &
223 ACPI_ALL_DRIVERS) ==
224 0 ? ' ' : '-');
225 p += sprintf(p,
226 "--\ndebug_layer = 0x%08X (* = enabled, - = partial)\n",
227 acpi_dbg_layer);
228 break;
229 case 1:
230 for (i = 0; i < ARRAY_SIZE(acpi_debug_levels); i++) {
231 p += sprintf(p, "%-25s\t0x%08lX [%c]\n",
232 acpi_debug_levels[i].name,
233 acpi_debug_levels[i].value,
234 (acpi_dbg_level & acpi_debug_levels[i].
235 value) ? '*' : ' ');
236 }
237 p += sprintf(p, "--\ndebug_level = 0x%08X (* = enabled)\n",
238 acpi_dbg_level);
239 break;
240 default:
241 p += sprintf(p, "Invalid debug option\n");
242 break;
243 }
244
245 end:
246 size = (p - page);
247 if (size <= off + count)
248 *eof = 1;
249 *start = page + off;
250 size -= off;
251 if (size > count)
252 size = count;
253 if (size < 0)
254 size = 0;
255
256 return size;
257}
258
259static int
260acpi_system_write_debug(struct file *file,
261 const char __user * buffer,
262 unsigned long count, void *data)
263{
264 char debug_string[12] = { '\0' };
265
266
267 if (count > sizeof(debug_string) - 1)
268 return -EINVAL;
269
270 if (copy_from_user(debug_string, buffer, count))
271 return -EFAULT;
272
273 debug_string[count] = '\0';
274
275 switch ((unsigned long)data) {
276 case 0:
277 acpi_dbg_layer = simple_strtoul(debug_string, NULL, 0);
278 break;
279 case 1:
280 acpi_dbg_level = simple_strtoul(debug_string, NULL, 0);
281 break;
282 default:
283 return -EINVAL;
284 }
285
286 return count;
287}
288
289static int __init acpi_debug_init(void)
290{
291 struct proc_dir_entry *entry;
292 int error = 0;
293 char *name;
294
295
296 if (acpi_disabled)
297 return 0;
298
299 /* 'debug_layer' [R/W] */
300 name = ACPI_SYSTEM_FILE_DEBUG_LAYER;
301 entry =
302 create_proc_read_entry(name, S_IFREG | S_IRUGO | S_IWUSR,
303 acpi_root_dir, acpi_system_read_debug,
304 (void *)0);
305 if (entry)
306 entry->write_proc = acpi_system_write_debug;
307 else
308 goto Error;
309
310 /* 'debug_level' [R/W] */
311 name = ACPI_SYSTEM_FILE_DEBUG_LEVEL;
312 entry =
313 create_proc_read_entry(name, S_IFREG | S_IRUGO | S_IWUSR,
314 acpi_root_dir, acpi_system_read_debug,
315 (void *)1);
316 if (entry)
317 entry->write_proc = acpi_system_write_debug;
318 else
319 goto Error;
320
321 Done:
322 return error;
323
324 Error:
325 remove_proc_entry(ACPI_SYSTEM_FILE_DEBUG_LEVEL, acpi_root_dir);
326 remove_proc_entry(ACPI_SYSTEM_FILE_DEBUG_LAYER, acpi_root_dir);
327 error = -ENODEV;
328 goto Done;
329}
330
331subsys_initcall(acpi_debug_init);
332#endif