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
13#define _COMPONENT ACPI_SYSTEM_COMPONENT
14ACPI_MODULE_NAME("debug");
15
16#ifdef MODULE_PARAM_PREFIX
17#undef MODULE_PARAM_PREFIX
18#endif
19#define MODULE_PARAM_PREFIX "acpi."
20
21struct acpi_dlayer {
22 const char *name;
23 unsigned long value;
24};
25struct acpi_dlevel {
26 const char *name;
27 unsigned long value;
28};
29#define ACPI_DEBUG_INIT(v) { .name = #v, .value = v }
30
31static const struct acpi_dlayer acpi_debug_layers[] = {
32 ACPI_DEBUG_INIT(ACPI_UTILITIES),
33 ACPI_DEBUG_INIT(ACPI_HARDWARE),
34 ACPI_DEBUG_INIT(ACPI_EVENTS),
35 ACPI_DEBUG_INIT(ACPI_TABLES),
36 ACPI_DEBUG_INIT(ACPI_NAMESPACE),
37 ACPI_DEBUG_INIT(ACPI_PARSER),
38 ACPI_DEBUG_INIT(ACPI_DISPATCHER),
39 ACPI_DEBUG_INIT(ACPI_EXECUTER),
40 ACPI_DEBUG_INIT(ACPI_RESOURCES),
41 ACPI_DEBUG_INIT(ACPI_CA_DEBUGGER),
42 ACPI_DEBUG_INIT(ACPI_OS_SERVICES),
43 ACPI_DEBUG_INIT(ACPI_CA_DISASSEMBLER),
44 ACPI_DEBUG_INIT(ACPI_COMPILER),
45 ACPI_DEBUG_INIT(ACPI_TOOLS),
46
47 ACPI_DEBUG_INIT(ACPI_BUS_COMPONENT),
48 ACPI_DEBUG_INIT(ACPI_AC_COMPONENT),
49 ACPI_DEBUG_INIT(ACPI_BATTERY_COMPONENT),
50 ACPI_DEBUG_INIT(ACPI_BUTTON_COMPONENT),
51 ACPI_DEBUG_INIT(ACPI_SBS_COMPONENT),
52 ACPI_DEBUG_INIT(ACPI_FAN_COMPONENT),
53 ACPI_DEBUG_INIT(ACPI_PCI_COMPONENT),
54 ACPI_DEBUG_INIT(ACPI_POWER_COMPONENT),
55 ACPI_DEBUG_INIT(ACPI_CONTAINER_COMPONENT),
56 ACPI_DEBUG_INIT(ACPI_SYSTEM_COMPONENT),
57 ACPI_DEBUG_INIT(ACPI_THERMAL_COMPONENT),
58 ACPI_DEBUG_INIT(ACPI_MEMORY_DEVICE_COMPONENT),
59 ACPI_DEBUG_INIT(ACPI_VIDEO_COMPONENT),
60 ACPI_DEBUG_INIT(ACPI_PROCESSOR_COMPONENT),
61};
62
63static const struct acpi_dlevel acpi_debug_levels[] = {
64 ACPI_DEBUG_INIT(ACPI_LV_INIT),
65 ACPI_DEBUG_INIT(ACPI_LV_DEBUG_OBJECT),
66 ACPI_DEBUG_INIT(ACPI_LV_INFO),
67
68 ACPI_DEBUG_INIT(ACPI_LV_INIT_NAMES),
69 ACPI_DEBUG_INIT(ACPI_LV_PARSE),
70 ACPI_DEBUG_INIT(ACPI_LV_LOAD),
71 ACPI_DEBUG_INIT(ACPI_LV_DISPATCH),
72 ACPI_DEBUG_INIT(ACPI_LV_EXEC),
73 ACPI_DEBUG_INIT(ACPI_LV_NAMES),
74 ACPI_DEBUG_INIT(ACPI_LV_OPREGION),
75 ACPI_DEBUG_INIT(ACPI_LV_BFIELD),
76 ACPI_DEBUG_INIT(ACPI_LV_TABLES),
77 ACPI_DEBUG_INIT(ACPI_LV_VALUES),
78 ACPI_DEBUG_INIT(ACPI_LV_OBJECTS),
79 ACPI_DEBUG_INIT(ACPI_LV_RESOURCES),
80 ACPI_DEBUG_INIT(ACPI_LV_USER_REQUESTS),
81 ACPI_DEBUG_INIT(ACPI_LV_PACKAGE),
82
83 ACPI_DEBUG_INIT(ACPI_LV_ALLOCATIONS),
84 ACPI_DEBUG_INIT(ACPI_LV_FUNCTIONS),
85 ACPI_DEBUG_INIT(ACPI_LV_OPTIMIZATIONS),
86
87 ACPI_DEBUG_INIT(ACPI_LV_MUTEX),
88 ACPI_DEBUG_INIT(ACPI_LV_THREADS),
89 ACPI_DEBUG_INIT(ACPI_LV_IO),
90 ACPI_DEBUG_INIT(ACPI_LV_INTERRUPTS),
91
92 ACPI_DEBUG_INIT(ACPI_LV_AML_DISASSEMBLE),
93 ACPI_DEBUG_INIT(ACPI_LV_VERBOSE_INFO),
94 ACPI_DEBUG_INIT(ACPI_LV_FULL_TABLES),
95 ACPI_DEBUG_INIT(ACPI_LV_EVENTS),
96};
97
98/* --------------------------------------------------------------------------
99 FS Interface (/sys)
100 -------------------------------------------------------------------------- */
101static int param_get_debug_layer(char *buffer, struct kernel_param *kp) {
102 int result = 0;
103 int i;
104
105 result = sprintf(buffer, "%-25s\tHex SET\n", "Description");
106
107 for(i = 0; i <ARRAY_SIZE(acpi_debug_layers); i++) {
108 result += sprintf(buffer+result, "%-25s\t0x%08lX [%c]\n",
109 acpi_debug_layers[i].name,
110 acpi_debug_layers[i].value,
111 (acpi_dbg_layer & acpi_debug_layers[i].value) ? '*' : ' ');
112 }
113 result += sprintf(buffer+result, "%-25s\t0x%08X [%c]\n", "ACPI_ALL_DRIVERS",
114 ACPI_ALL_DRIVERS,
115 (acpi_dbg_layer & ACPI_ALL_DRIVERS) ==
116 ACPI_ALL_DRIVERS ? '*' : (acpi_dbg_layer &
117 ACPI_ALL_DRIVERS) == 0 ? ' ' : '-');
118 result += sprintf(buffer+result, "--\ndebug_layer = 0x%08X ( * = enabled)\n", acpi_dbg_layer);
119
120 return result;
121}
122
123static int param_get_debug_level(char *buffer, struct kernel_param *kp) {
124 int result = 0;
125 int i;
126
127 result = sprintf(buffer, "%-25s\tHex SET\n", "Description");
128
129 for (i = 0; i < ARRAY_SIZE(acpi_debug_levels); i++) {
130 result += sprintf(buffer+result, "%-25s\t0x%08lX [%c]\n",
131 acpi_debug_levels[i].name,
132 acpi_debug_levels[i].value,
133 (acpi_dbg_level & acpi_debug_levels[i].
134 value) ? '*' : ' ');
135 }
136 result += sprintf(buffer+result, "--\ndebug_level = 0x%08X (* = enabled)\n",
137 acpi_dbg_level);
138
139 return result;
140}
141
142module_param_call(debug_layer, param_set_uint, param_get_debug_layer, &acpi_dbg_layer, 0644);
143module_param_call(debug_level, param_set_uint, param_get_debug_level, &acpi_dbg_level, 0644);
144
145static char trace_method_name[6];
146module_param_string(trace_method_name, trace_method_name, 6, 0644);
147static unsigned int trace_debug_layer;
148module_param(trace_debug_layer, uint, 0644);
149static unsigned int trace_debug_level;
150module_param(trace_debug_level, uint, 0644);
151
152static int param_set_trace_state(const char *val, struct kernel_param *kp)
153{
154 int result = 0;
155
156 if (!strncmp(val, "enable", strlen("enable") - 1)) {
157 result = acpi_debug_trace(trace_method_name, trace_debug_level,
158 trace_debug_layer, 0);
159 if (result)
160 result = -EBUSY;
161 goto exit;
162 }
163
164 if (!strncmp(val, "disable", strlen("disable") - 1)) {
165 int name = 0;
166 result = acpi_debug_trace((char *)&name, trace_debug_level,
167 trace_debug_layer, 0);
168 if (result)
169 result = -EBUSY;
170 goto exit;
171 }
172
173 if (!strncmp(val, "1", 1)) {
174 result = acpi_debug_trace(trace_method_name, trace_debug_level,
175 trace_debug_layer, 1);
176 if (result)
177 result = -EBUSY;
178 goto exit;
179 }
180
181 result = -EINVAL;
182exit:
183 return result;
184}
185
186static int param_get_trace_state(char *buffer, struct kernel_param *kp)
187{
188 if (!acpi_gbl_trace_method_name)
189 return sprintf(buffer, "disable");
190 else {
191 if (acpi_gbl_trace_flags & 1)
192 return sprintf(buffer, "1");
193 else
194 return sprintf(buffer, "enable");
195 }
196 return 0;
197}
198
199module_param_call(trace_state, param_set_trace_state, param_get_trace_state,
200 NULL, 0644);
201
202/* --------------------------------------------------------------------------
203 FS Interface (/proc)
204 -------------------------------------------------------------------------- */
205#ifdef CONFIG_ACPI_PROCFS
206#define ACPI_SYSTEM_FILE_DEBUG_LAYER "debug_layer"
207#define ACPI_SYSTEM_FILE_DEBUG_LEVEL "debug_level"
208
209static int
210acpi_system_read_debug(char *page,
211 char **start, off_t off, int count, int *eof, void *data)
212{
213 char *p = page;
214 int size = 0;
215 unsigned int i;
216
217 if (off != 0)
218 goto end;
219
220 p += sprintf(p, "%-25s\tHex SET\n", "Description");
221
222 switch ((unsigned long)data) {
223 case 0:
224 for (i = 0; i < ARRAY_SIZE(acpi_debug_layers); i++) {
225 p += sprintf(p, "%-25s\t0x%08lX [%c]\n",
226 acpi_debug_layers[i].name,
227 acpi_debug_layers[i].value,
228 (acpi_dbg_layer & acpi_debug_layers[i].
229 value) ? '*' : ' ');
230 }
231 p += sprintf(p, "%-25s\t0x%08X [%c]\n", "ACPI_ALL_DRIVERS",
232 ACPI_ALL_DRIVERS,
233 (acpi_dbg_layer & ACPI_ALL_DRIVERS) ==
234 ACPI_ALL_DRIVERS ? '*' : (acpi_dbg_layer &
235 ACPI_ALL_DRIVERS) ==
236 0 ? ' ' : '-');
237 p += sprintf(p,
238 "--\ndebug_layer = 0x%08X (* = enabled, - = partial)\n",
239 acpi_dbg_layer);
240 break;
241 case 1:
242 for (i = 0; i < ARRAY_SIZE(acpi_debug_levels); i++) {
243 p += sprintf(p, "%-25s\t0x%08lX [%c]\n",
244 acpi_debug_levels[i].name,
245 acpi_debug_levels[i].value,
246 (acpi_dbg_level & acpi_debug_levels[i].
247 value) ? '*' : ' ');
248 }
249 p += sprintf(p, "--\ndebug_level = 0x%08X (* = enabled)\n",
250 acpi_dbg_level);
251 break;
252 default:
253 p += sprintf(p, "Invalid debug option\n");
254 break;
255 }
256
257 end:
258 size = (p - page);
259 if (size <= off + count)
260 *eof = 1;
261 *start = page + off;
262 size -= off;
263 if (size > count)
264 size = count;
265 if (size < 0)
266 size = 0;
267
268 return size;
269}
270
271static int
272acpi_system_write_debug(struct file *file,
273 const char __user * buffer,
274 unsigned long count, void *data)
275{
276 char debug_string[12] = { '\0' };
277
278
279 if (count > sizeof(debug_string) - 1)
280 return -EINVAL;
281
282 if (copy_from_user(debug_string, buffer, count))
283 return -EFAULT;
284
285 debug_string[count] = '\0';
286
287 switch ((unsigned long)data) {
288 case 0:
289 acpi_dbg_layer = simple_strtoul(debug_string, NULL, 0);
290 break;
291 case 1:
292 acpi_dbg_level = simple_strtoul(debug_string, NULL, 0);
293 break;
294 default:
295 return -EINVAL;
296 }
297
298 return count;
299}
300
301static int __init acpi_debug_init(void)
302{
303 struct proc_dir_entry *entry;
304 int error = 0;
305 char *name;
306
307
308 if (acpi_disabled)
309 return 0;
310
311 /* 'debug_layer' [R/W] */
312 name = ACPI_SYSTEM_FILE_DEBUG_LAYER;
313 entry =
314 create_proc_read_entry(name, S_IFREG | S_IRUGO | S_IWUSR,
315 acpi_root_dir, acpi_system_read_debug,
316 (void *)0);
317 if (entry)
318 entry->write_proc = acpi_system_write_debug;
319 else
320 goto Error;
321
322 /* 'debug_level' [R/W] */
323 name = ACPI_SYSTEM_FILE_DEBUG_LEVEL;
324 entry =
325 create_proc_read_entry(name, S_IFREG | S_IRUGO | S_IWUSR,
326 acpi_root_dir, acpi_system_read_debug,
327 (void *)1);
328 if (entry)
329 entry->write_proc = acpi_system_write_debug;
330 else
331 goto Error;
332
333 Done:
334 return error;
335
336 Error:
337 remove_proc_entry(ACPI_SYSTEM_FILE_DEBUG_LEVEL, acpi_root_dir);
338 remove_proc_entry(ACPI_SYSTEM_FILE_DEBUG_LAYER, acpi_root_dir);
339 error = -ENODEV;
340 goto Done;
341}
342
343subsys_initcall(acpi_debug_init);
344#endif