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