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#define ACPI_SYSTEM_FILE_DEBUG_LAYER "debug_layer"
17#define ACPI_SYSTEM_FILE_DEBUG_LEVEL "debug_level"
18#ifdef MODULE_PARAM_PREFIX
19#undef MODULE_PARAM_PREFIX
20#endif
21#define MODULE_PARAM_PREFIX
22 module_param(acpi_dbg_layer, uint, 0400);
23module_param(acpi_dbg_level, uint, 0400);
24
25struct acpi_dlayer {
26 const char *name;
27 unsigned long value;
28};
29struct acpi_dlevel {
30 const char *name;
31 unsigned long value;
32};
33#define ACPI_DEBUG_INIT(v) { .name = #v, .value = v }
34
35static const struct acpi_dlayer acpi_debug_layers[] = {
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
52static const struct acpi_dlevel acpi_debug_levels[] = {
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),
86 ACPI_DEBUG_INIT(ACPI_LV_EVENTS),
87};
88
89static int
90acpi_system_read_debug(char *page,
91 char **start, off_t off, int count, int *eof, void *data)
92{
93 char *p = page;
94 int size = 0;
95 unsigned int i;
96
97 if (off != 0)
98 goto end;
99
100 p += sprintf(p, "%-25s\tHex SET\n", "Description");
101
102 switch ((unsigned long)data) {
103 case 0:
104 for (i = 0; i < ARRAY_SIZE(acpi_debug_layers); i++) {
105 p += sprintf(p, "%-25s\t0x%08lX [%c]\n",
106 acpi_debug_layers[i].name,
107 acpi_debug_layers[i].value,
108 (acpi_dbg_layer & acpi_debug_layers[i].
109 value) ? '*' : ' ');
110 }
111 p += sprintf(p, "%-25s\t0x%08X [%c]\n", "ACPI_ALL_DRIVERS",
112 ACPI_ALL_DRIVERS,
113 (acpi_dbg_layer & ACPI_ALL_DRIVERS) ==
114 ACPI_ALL_DRIVERS ? '*' : (acpi_dbg_layer &
115 ACPI_ALL_DRIVERS) ==
116 0 ? ' ' : '-');
117 p += sprintf(p,
118 "--\ndebug_layer = 0x%08X (* = enabled, - = partial)\n",
119 acpi_dbg_layer);
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",
124 acpi_debug_levels[i].name,
125 acpi_debug_levels[i].value,
126 (acpi_dbg_level & acpi_debug_levels[i].
127 value) ? '*' : ' ');
128 }
129 p += sprintf(p, "--\ndebug_level = 0x%08X (* = enabled)\n",
130 acpi_dbg_level);
131 break;
132 default:
133 p += sprintf(p, "Invalid debug option\n");
134 break;
135 }
136
137 end:
138 size = (p - page);
139 if (size <= off + count)
140 *eof = 1;
141 *start = page + off;
142 size -= off;
143 if (size > count)
144 size = count;
145 if (size < 0)
146 size = 0;
147
148 return size;
149}
150
151static int
152acpi_system_write_debug(struct file *file,
153 const char __user * buffer,
154 unsigned long count, void *data)
155{
156 char debug_string[12] = { '\0' };
157
158
159 if (count > sizeof(debug_string) - 1)
160 return -EINVAL;
161
162 if (copy_from_user(debug_string, buffer, count))
163 return -EFAULT;
164
165 debug_string[count] = '\0';
166
167 switch ((unsigned long)data) {
168 case 0:
169 acpi_dbg_layer = simple_strtoul(debug_string, NULL, 0);
170 break;
171 case 1:
172 acpi_dbg_level = simple_strtoul(debug_string, NULL, 0);
173 break;
174 default:
175 return -EINVAL;
176 }
177
178 return count;
179}
180
181static int __init acpi_debug_init(void)
182{
183 struct proc_dir_entry *entry;
184 int error = 0;
185 char *name;
186
187
188 if (acpi_disabled)
189 return 0;
190
191 /* 'debug_layer' [R/W] */
192 name = ACPI_SYSTEM_FILE_DEBUG_LAYER;
193 entry =
194 create_proc_read_entry(name, S_IFREG | S_IRUGO | S_IWUSR,
195 acpi_root_dir, acpi_system_read_debug,
196 (void *)0);
197 if (entry)
198 entry->write_proc = acpi_system_write_debug;
199 else
200 goto Error;
201
202 /* 'debug_level' [R/W] */
203 name = ACPI_SYSTEM_FILE_DEBUG_LEVEL;
204 entry =
205 create_proc_read_entry(name, S_IFREG | S_IRUGO | S_IWUSR,
206 acpi_root_dir, acpi_system_read_debug,
207 (void *)1);
208 if (entry)
209 entry->write_proc = acpi_system_write_debug;
210 else
211 goto Error;
212
213 Done:
214 return error;
215
216 Error:
217 remove_proc_entry(ACPI_SYSTEM_FILE_DEBUG_LEVEL, acpi_root_dir);
218 remove_proc_entry(ACPI_SYSTEM_FILE_DEBUG_LAYER, acpi_root_dir);
219 error = -ENODEV;
220 goto Done;
221}
222
223subsys_initcall(acpi_debug_init);