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Commit | Line | Data |
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1c8fce27 ZR |
1 | /* |
2 | * sysfs.c - ACPI sysfs interface to userspace. | |
3 | */ | |
4 | ||
5 | #include <linux/init.h> | |
6 | #include <linux/kernel.h> | |
7 | #include <linux/moduleparam.h> | |
8b48463f | 8 | #include <linux/acpi.h> |
1c8fce27 | 9 | |
3f8055c3 RW |
10 | #include "internal.h" |
11 | ||
1c8fce27 ZR |
12 | #define _COMPONENT ACPI_SYSTEM_COMPONENT |
13 | ACPI_MODULE_NAME("sysfs"); | |
14 | ||
1c8fce27 ZR |
15 | #ifdef CONFIG_ACPI_DEBUG |
16 | /* | |
17 | * ACPI debug sysfs I/F, including: | |
18 | * /sys/modules/acpi/parameters/debug_layer | |
19 | * /sys/modules/acpi/parameters/debug_level | |
20 | * /sys/modules/acpi/parameters/trace_method_name | |
21 | * /sys/modules/acpi/parameters/trace_state | |
22 | * /sys/modules/acpi/parameters/trace_debug_layer | |
23 | * /sys/modules/acpi/parameters/trace_debug_level | |
24 | */ | |
25 | ||
26 | struct acpi_dlayer { | |
27 | const char *name; | |
28 | unsigned long value; | |
29 | }; | |
30 | struct acpi_dlevel { | |
31 | const char *name; | |
32 | unsigned long value; | |
33 | }; | |
34 | #define ACPI_DEBUG_INIT(v) { .name = #v, .value = v } | |
35 | ||
36 | static const struct acpi_dlayer acpi_debug_layers[] = { | |
37 | ACPI_DEBUG_INIT(ACPI_UTILITIES), | |
38 | ACPI_DEBUG_INIT(ACPI_HARDWARE), | |
39 | ACPI_DEBUG_INIT(ACPI_EVENTS), | |
40 | ACPI_DEBUG_INIT(ACPI_TABLES), | |
41 | ACPI_DEBUG_INIT(ACPI_NAMESPACE), | |
42 | ACPI_DEBUG_INIT(ACPI_PARSER), | |
43 | ACPI_DEBUG_INIT(ACPI_DISPATCHER), | |
44 | ACPI_DEBUG_INIT(ACPI_EXECUTER), | |
45 | ACPI_DEBUG_INIT(ACPI_RESOURCES), | |
46 | ACPI_DEBUG_INIT(ACPI_CA_DEBUGGER), | |
47 | ACPI_DEBUG_INIT(ACPI_OS_SERVICES), | |
48 | ACPI_DEBUG_INIT(ACPI_CA_DISASSEMBLER), | |
49 | ACPI_DEBUG_INIT(ACPI_COMPILER), | |
50 | ACPI_DEBUG_INIT(ACPI_TOOLS), | |
51 | ||
52 | ACPI_DEBUG_INIT(ACPI_BUS_COMPONENT), | |
53 | ACPI_DEBUG_INIT(ACPI_AC_COMPONENT), | |
54 | ACPI_DEBUG_INIT(ACPI_BATTERY_COMPONENT), | |
55 | ACPI_DEBUG_INIT(ACPI_BUTTON_COMPONENT), | |
56 | ACPI_DEBUG_INIT(ACPI_SBS_COMPONENT), | |
57 | ACPI_DEBUG_INIT(ACPI_FAN_COMPONENT), | |
58 | ACPI_DEBUG_INIT(ACPI_PCI_COMPONENT), | |
59 | ACPI_DEBUG_INIT(ACPI_POWER_COMPONENT), | |
60 | ACPI_DEBUG_INIT(ACPI_CONTAINER_COMPONENT), | |
61 | ACPI_DEBUG_INIT(ACPI_SYSTEM_COMPONENT), | |
62 | ACPI_DEBUG_INIT(ACPI_THERMAL_COMPONENT), | |
63 | ACPI_DEBUG_INIT(ACPI_MEMORY_DEVICE_COMPONENT), | |
64 | ACPI_DEBUG_INIT(ACPI_VIDEO_COMPONENT), | |
65 | ACPI_DEBUG_INIT(ACPI_PROCESSOR_COMPONENT), | |
66 | }; | |
67 | ||
68 | static const struct acpi_dlevel acpi_debug_levels[] = { | |
69 | ACPI_DEBUG_INIT(ACPI_LV_INIT), | |
70 | ACPI_DEBUG_INIT(ACPI_LV_DEBUG_OBJECT), | |
71 | ACPI_DEBUG_INIT(ACPI_LV_INFO), | |
93d98831 | 72 | ACPI_DEBUG_INIT(ACPI_LV_REPAIR), |
7901a052 | 73 | ACPI_DEBUG_INIT(ACPI_LV_TRACE_POINT), |
1c8fce27 ZR |
74 | |
75 | ACPI_DEBUG_INIT(ACPI_LV_INIT_NAMES), | |
76 | ACPI_DEBUG_INIT(ACPI_LV_PARSE), | |
77 | ACPI_DEBUG_INIT(ACPI_LV_LOAD), | |
78 | ACPI_DEBUG_INIT(ACPI_LV_DISPATCH), | |
79 | ACPI_DEBUG_INIT(ACPI_LV_EXEC), | |
80 | ACPI_DEBUG_INIT(ACPI_LV_NAMES), | |
81 | ACPI_DEBUG_INIT(ACPI_LV_OPREGION), | |
82 | ACPI_DEBUG_INIT(ACPI_LV_BFIELD), | |
83 | ACPI_DEBUG_INIT(ACPI_LV_TABLES), | |
84 | ACPI_DEBUG_INIT(ACPI_LV_VALUES), | |
85 | ACPI_DEBUG_INIT(ACPI_LV_OBJECTS), | |
86 | ACPI_DEBUG_INIT(ACPI_LV_RESOURCES), | |
87 | ACPI_DEBUG_INIT(ACPI_LV_USER_REQUESTS), | |
88 | ACPI_DEBUG_INIT(ACPI_LV_PACKAGE), | |
89 | ||
90 | ACPI_DEBUG_INIT(ACPI_LV_ALLOCATIONS), | |
91 | ACPI_DEBUG_INIT(ACPI_LV_FUNCTIONS), | |
92 | ACPI_DEBUG_INIT(ACPI_LV_OPTIMIZATIONS), | |
93 | ||
94 | ACPI_DEBUG_INIT(ACPI_LV_MUTEX), | |
95 | ACPI_DEBUG_INIT(ACPI_LV_THREADS), | |
96 | ACPI_DEBUG_INIT(ACPI_LV_IO), | |
97 | ACPI_DEBUG_INIT(ACPI_LV_INTERRUPTS), | |
98 | ||
99 | ACPI_DEBUG_INIT(ACPI_LV_AML_DISASSEMBLE), | |
100 | ACPI_DEBUG_INIT(ACPI_LV_VERBOSE_INFO), | |
101 | ACPI_DEBUG_INIT(ACPI_LV_FULL_TABLES), | |
102 | ACPI_DEBUG_INIT(ACPI_LV_EVENTS), | |
103 | }; | |
104 | ||
ec652b35 | 105 | static int param_get_debug_layer(char *buffer, const struct kernel_param *kp) |
1c8fce27 ZR |
106 | { |
107 | int result = 0; | |
108 | int i; | |
109 | ||
110 | result = sprintf(buffer, "%-25s\tHex SET\n", "Description"); | |
111 | ||
112 | for (i = 0; i < ARRAY_SIZE(acpi_debug_layers); i++) { | |
113 | result += sprintf(buffer + result, "%-25s\t0x%08lX [%c]\n", | |
114 | acpi_debug_layers[i].name, | |
115 | acpi_debug_layers[i].value, | |
116 | (acpi_dbg_layer & acpi_debug_layers[i].value) | |
117 | ? '*' : ' '); | |
118 | } | |
119 | result += | |
120 | sprintf(buffer + result, "%-25s\t0x%08X [%c]\n", "ACPI_ALL_DRIVERS", | |
121 | ACPI_ALL_DRIVERS, | |
122 | (acpi_dbg_layer & ACPI_ALL_DRIVERS) == | |
123 | ACPI_ALL_DRIVERS ? '*' : (acpi_dbg_layer & ACPI_ALL_DRIVERS) | |
124 | == 0 ? ' ' : '-'); | |
125 | result += | |
126 | sprintf(buffer + result, | |
127 | "--\ndebug_layer = 0x%08X ( * = enabled)\n", | |
128 | acpi_dbg_layer); | |
129 | ||
130 | return result; | |
131 | } | |
132 | ||
ec652b35 | 133 | static int param_get_debug_level(char *buffer, const struct kernel_param *kp) |
1c8fce27 ZR |
134 | { |
135 | int result = 0; | |
136 | int i; | |
137 | ||
138 | result = sprintf(buffer, "%-25s\tHex SET\n", "Description"); | |
139 | ||
140 | for (i = 0; i < ARRAY_SIZE(acpi_debug_levels); i++) { | |
141 | result += sprintf(buffer + result, "%-25s\t0x%08lX [%c]\n", | |
142 | acpi_debug_levels[i].name, | |
143 | acpi_debug_levels[i].value, | |
144 | (acpi_dbg_level & acpi_debug_levels[i].value) | |
145 | ? '*' : ' '); | |
146 | } | |
147 | result += | |
148 | sprintf(buffer + result, "--\ndebug_level = 0x%08X (* = enabled)\n", | |
149 | acpi_dbg_level); | |
150 | ||
151 | return result; | |
152 | } | |
153 | ||
9c8b04be | 154 | static const struct kernel_param_ops param_ops_debug_layer = { |
ec652b35 ZR |
155 | .set = param_set_uint, |
156 | .get = param_get_debug_layer, | |
157 | }; | |
158 | ||
9c8b04be | 159 | static const struct kernel_param_ops param_ops_debug_level = { |
ec652b35 ZR |
160 | .set = param_set_uint, |
161 | .get = param_get_debug_level, | |
162 | }; | |
163 | ||
164 | module_param_cb(debug_layer, ¶m_ops_debug_layer, &acpi_dbg_layer, 0644); | |
165 | module_param_cb(debug_level, ¶m_ops_debug_level, &acpi_dbg_level, 0644); | |
1c8fce27 | 166 | |
a0186bcf | 167 | static char trace_method_name[1024]; |
1c8fce27 | 168 | |
7901a052 | 169 | int param_set_trace_method_name(const char *val, const struct kernel_param *kp) |
1c8fce27 | 170 | { |
7901a052 | 171 | u32 saved_flags = 0; |
a0186bcf | 172 | bool is_abs_path = true; |
1c8fce27 | 173 | |
a0186bcf LZ |
174 | if (*val != '\\') |
175 | is_abs_path = false; | |
176 | ||
177 | if ((is_abs_path && strlen(val) > 1023) || | |
178 | (!is_abs_path && strlen(val) > 1022)) { | |
7901a052 LZ |
179 | pr_err("%s: string parameter too long\n", kp->name); |
180 | return -ENOSPC; | |
1c8fce27 ZR |
181 | } |
182 | ||
7901a052 LZ |
183 | /* |
184 | * It's not safe to update acpi_gbl_trace_method_name without | |
185 | * having the tracer stopped, so we save the original tracer | |
186 | * state and disable it. | |
187 | */ | |
188 | saved_flags = acpi_gbl_trace_flags; | |
189 | (void)acpi_debug_trace(NULL, | |
190 | acpi_gbl_trace_dbg_level, | |
191 | acpi_gbl_trace_dbg_layer, | |
192 | 0); | |
193 | ||
7901a052 | 194 | /* This is a hack. We can't kmalloc in early boot. */ |
a0186bcf LZ |
195 | if (is_abs_path) |
196 | strcpy(trace_method_name, val); | |
197 | else { | |
198 | trace_method_name[0] = '\\'; | |
199 | strcpy(trace_method_name+1, val); | |
200 | } | |
7901a052 LZ |
201 | |
202 | /* Restore the original tracer state */ | |
203 | (void)acpi_debug_trace(trace_method_name, | |
204 | acpi_gbl_trace_dbg_level, | |
205 | acpi_gbl_trace_dbg_layer, | |
206 | saved_flags); | |
1c8fce27 | 207 | |
7901a052 LZ |
208 | return 0; |
209 | } | |
1c8fce27 | 210 | |
7901a052 LZ |
211 | static int param_get_trace_method_name(char *buffer, const struct kernel_param *kp) |
212 | { | |
213 | return scnprintf(buffer, PAGE_SIZE, "%s", acpi_gbl_trace_method_name); | |
214 | } | |
215 | ||
216 | static const struct kernel_param_ops param_ops_trace_method = { | |
217 | .set = param_set_trace_method_name, | |
218 | .get = param_get_trace_method_name, | |
219 | }; | |
220 | ||
221 | static const struct kernel_param_ops param_ops_trace_attrib = { | |
222 | .set = param_set_uint, | |
223 | .get = param_get_uint, | |
224 | }; | |
225 | ||
226 | module_param_cb(trace_method_name, ¶m_ops_trace_method, &trace_method_name, 0644); | |
227 | module_param_cb(trace_debug_layer, ¶m_ops_trace_attrib, &acpi_gbl_trace_dbg_layer, 0644); | |
228 | module_param_cb(trace_debug_level, ¶m_ops_trace_attrib, &acpi_gbl_trace_dbg_level, 0644); | |
229 | ||
230 | static int param_set_trace_state(const char *val, struct kernel_param *kp) | |
231 | { | |
232 | acpi_status status; | |
233 | const char *method = trace_method_name; | |
234 | u32 flags = 0; | |
235 | ||
236 | /* So "xxx-once" comparison should go prior than "xxx" comparison */ | |
237 | #define acpi_compare_param(val, key) \ | |
238 | strncmp((val), (key), sizeof(key) - 1) | |
239 | ||
240 | if (!acpi_compare_param(val, "enable")) { | |
241 | method = NULL; | |
242 | flags = ACPI_TRACE_ENABLED; | |
243 | } else if (!acpi_compare_param(val, "disable")) | |
244 | method = NULL; | |
245 | else if (!acpi_compare_param(val, "method-once")) | |
246 | flags = ACPI_TRACE_ENABLED | ACPI_TRACE_ONESHOT; | |
247 | else if (!acpi_compare_param(val, "method")) | |
248 | flags = ACPI_TRACE_ENABLED; | |
249 | else if (!acpi_compare_param(val, "opcode-once")) | |
250 | flags = ACPI_TRACE_ENABLED | ACPI_TRACE_ONESHOT | ACPI_TRACE_OPCODE; | |
251 | else if (!acpi_compare_param(val, "opcode")) | |
252 | flags = ACPI_TRACE_ENABLED | ACPI_TRACE_OPCODE; | |
253 | else | |
254 | return -EINVAL; | |
255 | ||
256 | status = acpi_debug_trace(method, | |
257 | acpi_gbl_trace_dbg_level, | |
258 | acpi_gbl_trace_dbg_layer, | |
259 | flags); | |
260 | if (ACPI_FAILURE(status)) | |
261 | return -EBUSY; | |
262 | ||
263 | return 0; | |
1c8fce27 ZR |
264 | } |
265 | ||
266 | static int param_get_trace_state(char *buffer, struct kernel_param *kp) | |
267 | { | |
7901a052 | 268 | if (!(acpi_gbl_trace_flags & ACPI_TRACE_ENABLED)) |
1c8fce27 ZR |
269 | return sprintf(buffer, "disable"); |
270 | else { | |
7901a052 LZ |
271 | if (acpi_gbl_trace_method_name) { |
272 | if (acpi_gbl_trace_flags & ACPI_TRACE_ONESHOT) | |
273 | return sprintf(buffer, "method-once"); | |
274 | else | |
275 | return sprintf(buffer, "method"); | |
276 | } else | |
1c8fce27 ZR |
277 | return sprintf(buffer, "enable"); |
278 | } | |
279 | return 0; | |
280 | } | |
281 | ||
282 | module_param_call(trace_state, param_set_trace_state, param_get_trace_state, | |
283 | NULL, 0644); | |
284 | #endif /* CONFIG_ACPI_DEBUG */ | |
285 | ||
aecad432 TR |
286 | |
287 | /* /sys/modules/acpi/parameters/aml_debug_output */ | |
288 | ||
289 | module_param_named(aml_debug_output, acpi_gbl_enable_aml_debug_object, | |
481c1381 | 290 | byte, 0644); |
aecad432 TR |
291 | MODULE_PARM_DESC(aml_debug_output, |
292 | "To enable/disable the ACPI Debug Object output."); | |
293 | ||
1c8fce27 ZR |
294 | /* /sys/module/acpi/parameters/acpica_version */ |
295 | static int param_get_acpica_version(char *buffer, struct kernel_param *kp) | |
296 | { | |
297 | int result; | |
298 | ||
299 | result = sprintf(buffer, "%x", ACPI_CA_VERSION); | |
300 | ||
301 | return result; | |
302 | } | |
303 | ||
304 | module_param_call(acpica_version, NULL, param_get_acpica_version, NULL, 0444); | |
305 | ||
306 | /* | |
307 | * ACPI table sysfs I/F: | |
308 | * /sys/firmware/acpi/tables/ | |
309 | * /sys/firmware/acpi/tables/dynamic/ | |
310 | */ | |
311 | ||
312 | static LIST_HEAD(acpi_table_attr_list); | |
313 | static struct kobject *tables_kobj; | |
314 | static struct kobject *dynamic_tables_kobj; | |
3f8055c3 | 315 | static struct kobject *hotplug_kobj; |
1c8fce27 | 316 | |
914c6194 LZ |
317 | #define ACPI_MAX_TABLE_INSTANCES 999 |
318 | #define ACPI_INST_SIZE 4 /* including trailing 0 */ | |
319 | ||
1c8fce27 ZR |
320 | struct acpi_table_attr { |
321 | struct bin_attribute attr; | |
914c6194 | 322 | char name[ACPI_NAME_SIZE]; |
1c8fce27 | 323 | int instance; |
914c6194 | 324 | char filename[ACPI_NAME_SIZE+ACPI_INST_SIZE]; |
1c8fce27 ZR |
325 | struct list_head node; |
326 | }; | |
327 | ||
328 | static ssize_t acpi_table_show(struct file *filp, struct kobject *kobj, | |
329 | struct bin_attribute *bin_attr, char *buf, | |
330 | loff_t offset, size_t count) | |
331 | { | |
332 | struct acpi_table_attr *table_attr = | |
333 | container_of(bin_attr, struct acpi_table_attr, attr); | |
334 | struct acpi_table_header *table_header = NULL; | |
335 | acpi_status status; | |
0de0e198 | 336 | ssize_t rc; |
1c8fce27 | 337 | |
914c6194 LZ |
338 | status = acpi_get_table(table_attr->name, table_attr->instance, |
339 | &table_header); | |
1c8fce27 ZR |
340 | if (ACPI_FAILURE(status)) |
341 | return -ENODEV; | |
342 | ||
0de0e198 DW |
343 | rc = memory_read_from_buffer(buf, count, &offset, table_header, |
344 | table_header->length); | |
345 | acpi_put_table(table_header); | |
346 | return rc; | |
1c8fce27 ZR |
347 | } |
348 | ||
914c6194 LZ |
349 | static int acpi_table_attr_init(struct kobject *tables_obj, |
350 | struct acpi_table_attr *table_attr, | |
351 | struct acpi_table_header *table_header) | |
1c8fce27 ZR |
352 | { |
353 | struct acpi_table_header *header = NULL; | |
354 | struct acpi_table_attr *attr = NULL; | |
914c6194 | 355 | char instance_str[ACPI_INST_SIZE]; |
1c8fce27 ZR |
356 | |
357 | sysfs_attr_init(&table_attr->attr.attr); | |
914c6194 | 358 | ACPI_MOVE_NAME(table_attr->name, table_header->signature); |
1c8fce27 ZR |
359 | |
360 | list_for_each_entry(attr, &acpi_table_attr_list, node) { | |
914c6194 | 361 | if (ACPI_COMPARE_NAME(table_attr->name, attr->name)) |
1c8fce27 ZR |
362 | if (table_attr->instance < attr->instance) |
363 | table_attr->instance = attr->instance; | |
364 | } | |
365 | table_attr->instance++; | |
914c6194 LZ |
366 | if (table_attr->instance > ACPI_MAX_TABLE_INSTANCES) { |
367 | pr_warn("%4.4s: too many table instances\n", | |
368 | table_attr->name); | |
369 | return -ERANGE; | |
370 | } | |
1c8fce27 | 371 | |
914c6194 LZ |
372 | ACPI_MOVE_NAME(table_attr->filename, table_header->signature); |
373 | table_attr->filename[ACPI_NAME_SIZE] = '\0'; | |
1c8fce27 ZR |
374 | if (table_attr->instance > 1 || (table_attr->instance == 1 && |
375 | !acpi_get_table | |
914c6194 LZ |
376 | (table_header->signature, 2, &header))) { |
377 | snprintf(instance_str, sizeof(instance_str), "%u", | |
378 | table_attr->instance); | |
379 | strcat(table_attr->filename, instance_str); | |
380 | } | |
1c8fce27 | 381 | |
083ca8c4 | 382 | table_attr->attr.size = table_header->length; |
1c8fce27 | 383 | table_attr->attr.read = acpi_table_show; |
914c6194 | 384 | table_attr->attr.attr.name = table_attr->filename; |
1c8fce27 ZR |
385 | table_attr->attr.attr.mode = 0400; |
386 | ||
914c6194 | 387 | return sysfs_create_bin_file(tables_obj, &table_attr->attr); |
1c8fce27 ZR |
388 | } |
389 | ||
68bdb677 | 390 | acpi_status acpi_sysfs_table_handler(u32 event, void *table, void *context) |
1c8fce27 ZR |
391 | { |
392 | struct acpi_table_attr *table_attr; | |
393 | ||
394 | switch (event) { | |
307ecb0a | 395 | case ACPI_TABLE_EVENT_INSTALL: |
1c8fce27 ZR |
396 | table_attr = |
397 | kzalloc(sizeof(struct acpi_table_attr), GFP_KERNEL); | |
398 | if (!table_attr) | |
399 | return AE_NO_MEMORY; | |
400 | ||
914c6194 LZ |
401 | if (acpi_table_attr_init(dynamic_tables_kobj, |
402 | table_attr, table)) { | |
1c8fce27 ZR |
403 | kfree(table_attr); |
404 | return AE_ERROR; | |
914c6194 LZ |
405 | } |
406 | list_add_tail(&table_attr->node, &acpi_table_attr_list); | |
1c8fce27 | 407 | break; |
307ecb0a | 408 | case ACPI_TABLE_EVENT_LOAD: |
1c8fce27 | 409 | case ACPI_TABLE_EVENT_UNLOAD: |
307ecb0a | 410 | case ACPI_TABLE_EVENT_UNINSTALL: |
1c8fce27 ZR |
411 | /* |
412 | * we do not need to do anything right now | |
413 | * because the table is not deleted from the | |
414 | * global table list when unloading it. | |
415 | */ | |
416 | break; | |
417 | default: | |
418 | return AE_BAD_PARAMETER; | |
419 | } | |
420 | return AE_OK; | |
421 | } | |
422 | ||
423 | static int acpi_tables_sysfs_init(void) | |
424 | { | |
425 | struct acpi_table_attr *table_attr; | |
426 | struct acpi_table_header *table_header = NULL; | |
de03beed JC |
427 | int table_index; |
428 | acpi_status status; | |
429 | int ret; | |
1c8fce27 ZR |
430 | |
431 | tables_kobj = kobject_create_and_add("tables", acpi_kobj); | |
432 | if (!tables_kobj) | |
433 | goto err; | |
434 | ||
435 | dynamic_tables_kobj = kobject_create_and_add("dynamic", tables_kobj); | |
436 | if (!dynamic_tables_kobj) | |
437 | goto err_dynamic_tables; | |
438 | ||
de03beed JC |
439 | for (table_index = 0;; table_index++) { |
440 | status = acpi_get_table_by_index(table_index, &table_header); | |
441 | ||
442 | if (status == AE_BAD_PARAMETER) | |
443 | break; | |
444 | ||
445 | if (ACPI_FAILURE(status)) | |
446 | continue; | |
447 | ||
de03beed JC |
448 | table_attr = kzalloc(sizeof(*table_attr), GFP_KERNEL); |
449 | if (!table_attr) | |
450 | return -ENOMEM; | |
451 | ||
914c6194 LZ |
452 | ret = acpi_table_attr_init(tables_kobj, |
453 | table_attr, table_header); | |
de03beed JC |
454 | if (ret) { |
455 | kfree(table_attr); | |
456 | return ret; | |
1c8fce27 | 457 | } |
de03beed JC |
458 | list_add_tail(&table_attr->node, &acpi_table_attr_list); |
459 | } | |
460 | ||
1c8fce27 ZR |
461 | kobject_uevent(tables_kobj, KOBJ_ADD); |
462 | kobject_uevent(dynamic_tables_kobj, KOBJ_ADD); | |
1c8fce27 | 463 | |
68bdb677 | 464 | return 0; |
1c8fce27 ZR |
465 | err_dynamic_tables: |
466 | kobject_put(tables_kobj); | |
467 | err: | |
468 | return -ENOMEM; | |
469 | } | |
470 | ||
471 | /* | |
472 | * Detailed ACPI IRQ counters: | |
473 | * /sys/firmware/acpi/interrupts/ | |
474 | */ | |
475 | ||
476 | u32 acpi_irq_handled; | |
477 | u32 acpi_irq_not_handled; | |
478 | ||
479 | #define COUNT_GPE 0 | |
480 | #define COUNT_SCI 1 /* acpi_irq_handled */ | |
481 | #define COUNT_SCI_NOT 2 /* acpi_irq_not_handled */ | |
482 | #define COUNT_ERROR 3 /* other */ | |
483 | #define NUM_COUNTERS_EXTRA 4 | |
484 | ||
485 | struct event_counter { | |
486 | u32 count; | |
487 | u32 flags; | |
488 | }; | |
489 | ||
490 | static struct event_counter *all_counters; | |
491 | static u32 num_gpes; | |
492 | static u32 num_counters; | |
493 | static struct attribute **all_attrs; | |
494 | static u32 acpi_gpe_count; | |
495 | ||
496 | static struct attribute_group interrupt_stats_attr_group = { | |
497 | .name = "interrupts", | |
498 | }; | |
499 | ||
500 | static struct kobj_attribute *counter_attrs; | |
501 | ||
502 | static void delete_gpe_attr_array(void) | |
503 | { | |
504 | struct event_counter *tmp = all_counters; | |
505 | ||
506 | all_counters = NULL; | |
507 | kfree(tmp); | |
508 | ||
509 | if (counter_attrs) { | |
510 | int i; | |
511 | ||
512 | for (i = 0; i < num_gpes; i++) | |
513 | kfree(counter_attrs[i].attr.name); | |
514 | ||
515 | kfree(counter_attrs); | |
516 | } | |
517 | kfree(all_attrs); | |
518 | ||
519 | return; | |
520 | } | |
521 | ||
a0fcdb23 | 522 | static void gpe_count(u32 gpe_number) |
1c8fce27 ZR |
523 | { |
524 | acpi_gpe_count++; | |
525 | ||
526 | if (!all_counters) | |
527 | return; | |
528 | ||
529 | if (gpe_number < num_gpes) | |
530 | all_counters[gpe_number].count++; | |
531 | else | |
532 | all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + | |
533 | COUNT_ERROR].count++; | |
534 | ||
535 | return; | |
536 | } | |
537 | ||
a0fcdb23 | 538 | static void fixed_event_count(u32 event_number) |
1c8fce27 ZR |
539 | { |
540 | if (!all_counters) | |
541 | return; | |
542 | ||
543 | if (event_number < ACPI_NUM_FIXED_EVENTS) | |
544 | all_counters[num_gpes + event_number].count++; | |
545 | else | |
546 | all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + | |
547 | COUNT_ERROR].count++; | |
548 | ||
549 | return; | |
550 | } | |
551 | ||
644ef74e | 552 | static void acpi_global_event_handler(u32 event_type, acpi_handle device, |
a0fcdb23 LM |
553 | u32 event_number, void *context) |
554 | { | |
555 | if (event_type == ACPI_EVENT_TYPE_GPE) | |
556 | gpe_count(event_number); | |
557 | ||
558 | if (event_type == ACPI_EVENT_TYPE_FIXED) | |
559 | fixed_event_count(event_number); | |
560 | } | |
561 | ||
1c8fce27 ZR |
562 | static int get_status(u32 index, acpi_event_status *status, |
563 | acpi_handle *handle) | |
564 | { | |
f18ebc21 | 565 | int result; |
1c8fce27 ZR |
566 | |
567 | if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS) | |
f18ebc21 | 568 | return -EINVAL; |
1c8fce27 ZR |
569 | |
570 | if (index < num_gpes) { | |
571 | result = acpi_get_gpe_device(index, handle); | |
572 | if (result) { | |
573 | ACPI_EXCEPTION((AE_INFO, AE_NOT_FOUND, | |
c6284237 | 574 | "Invalid GPE 0x%x", index)); |
f18ebc21 | 575 | return result; |
1c8fce27 ZR |
576 | } |
577 | result = acpi_get_gpe_status(*handle, index, status); | |
578 | } else if (index < (num_gpes + ACPI_NUM_FIXED_EVENTS)) | |
579 | result = acpi_get_event_status(index - num_gpes, status); | |
580 | ||
1c8fce27 ZR |
581 | return result; |
582 | } | |
583 | ||
584 | static ssize_t counter_show(struct kobject *kobj, | |
585 | struct kobj_attribute *attr, char *buf) | |
586 | { | |
587 | int index = attr - counter_attrs; | |
588 | int size; | |
589 | acpi_handle handle; | |
590 | acpi_event_status status; | |
591 | int result = 0; | |
592 | ||
593 | all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI].count = | |
594 | acpi_irq_handled; | |
595 | all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI_NOT].count = | |
596 | acpi_irq_not_handled; | |
597 | all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE].count = | |
598 | acpi_gpe_count; | |
7b1a1322 | 599 | size = sprintf(buf, "%8u", all_counters[index].count); |
1c8fce27 ZR |
600 | |
601 | /* "gpe_all" or "sci" */ | |
602 | if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS) | |
603 | goto end; | |
604 | ||
605 | result = get_status(index, &status, &handle); | |
606 | if (result) | |
607 | goto end; | |
608 | ||
18864cc4 LZ |
609 | if (status & ACPI_EVENT_FLAG_ENABLE_SET) |
610 | size += sprintf(buf + size, " EN"); | |
611 | else | |
612 | size += sprintf(buf + size, " "); | |
613 | if (status & ACPI_EVENT_FLAG_STATUS_SET) | |
614 | size += sprintf(buf + size, " STS"); | |
615 | else | |
616 | size += sprintf(buf + size, " "); | |
617 | ||
2f857234 | 618 | if (!(status & ACPI_EVENT_FLAG_HAS_HANDLER)) |
18864cc4 | 619 | size += sprintf(buf + size, " invalid "); |
1c8fce27 | 620 | else if (status & ACPI_EVENT_FLAG_ENABLED) |
18864cc4 | 621 | size += sprintf(buf + size, " enabled "); |
1c8fce27 | 622 | else if (status & ACPI_EVENT_FLAG_WAKE_ENABLED) |
18864cc4 | 623 | size += sprintf(buf + size, " wake_enabled"); |
1c8fce27 | 624 | else |
18864cc4 LZ |
625 | size += sprintf(buf + size, " disabled "); |
626 | if (status & ACPI_EVENT_FLAG_MASKED) | |
627 | size += sprintf(buf + size, " masked "); | |
628 | else | |
629 | size += sprintf(buf + size, " unmasked"); | |
1c8fce27 ZR |
630 | |
631 | end: | |
632 | size += sprintf(buf + size, "\n"); | |
633 | return result ? result : size; | |
634 | } | |
635 | ||
636 | /* | |
637 | * counter_set() sets the specified counter. | |
638 | * setting the total "sci" file to any value clears all counters. | |
639 | * enable/disable/clear a gpe/fixed event in user space. | |
640 | */ | |
641 | static ssize_t counter_set(struct kobject *kobj, | |
642 | struct kobj_attribute *attr, const char *buf, | |
643 | size_t size) | |
644 | { | |
645 | int index = attr - counter_attrs; | |
646 | acpi_event_status status; | |
647 | acpi_handle handle; | |
648 | int result = 0; | |
c48b1565 | 649 | unsigned long tmp; |
1c8fce27 ZR |
650 | |
651 | if (index == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI) { | |
652 | int i; | |
653 | for (i = 0; i < num_counters; ++i) | |
654 | all_counters[i].count = 0; | |
655 | acpi_gpe_count = 0; | |
656 | acpi_irq_handled = 0; | |
657 | acpi_irq_not_handled = 0; | |
658 | goto end; | |
659 | } | |
660 | ||
661 | /* show the event status for both GPEs and Fixed Events */ | |
662 | result = get_status(index, &status, &handle); | |
663 | if (result) | |
664 | goto end; | |
665 | ||
2f857234 | 666 | if (!(status & ACPI_EVENT_FLAG_HAS_HANDLER)) { |
1c8fce27 ZR |
667 | printk(KERN_WARNING PREFIX |
668 | "Can not change Invalid GPE/Fixed Event status\n"); | |
669 | return -EINVAL; | |
670 | } | |
671 | ||
672 | if (index < num_gpes) { | |
673 | if (!strcmp(buf, "disable\n") && | |
674 | (status & ACPI_EVENT_FLAG_ENABLED)) | |
675 | result = acpi_disable_gpe(handle, index); | |
676 | else if (!strcmp(buf, "enable\n") && | |
677 | !(status & ACPI_EVENT_FLAG_ENABLED)) | |
678 | result = acpi_enable_gpe(handle, index); | |
679 | else if (!strcmp(buf, "clear\n") && | |
18864cc4 | 680 | (status & ACPI_EVENT_FLAG_STATUS_SET)) |
1c8fce27 | 681 | result = acpi_clear_gpe(handle, index); |
18864cc4 LZ |
682 | else if (!strcmp(buf, "mask\n")) |
683 | result = acpi_mask_gpe(handle, index, TRUE); | |
684 | else if (!strcmp(buf, "unmask\n")) | |
685 | result = acpi_mask_gpe(handle, index, FALSE); | |
c48b1565 LT |
686 | else if (!kstrtoul(buf, 0, &tmp)) |
687 | all_counters[index].count = tmp; | |
1c8fce27 | 688 | else |
c48b1565 | 689 | result = -EINVAL; |
1c8fce27 ZR |
690 | } else if (index < num_gpes + ACPI_NUM_FIXED_EVENTS) { |
691 | int event = index - num_gpes; | |
692 | if (!strcmp(buf, "disable\n") && | |
18864cc4 | 693 | (status & ACPI_EVENT_FLAG_ENABLE_SET)) |
1c8fce27 ZR |
694 | result = acpi_disable_event(event, ACPI_NOT_ISR); |
695 | else if (!strcmp(buf, "enable\n") && | |
18864cc4 | 696 | !(status & ACPI_EVENT_FLAG_ENABLE_SET)) |
1c8fce27 ZR |
697 | result = acpi_enable_event(event, ACPI_NOT_ISR); |
698 | else if (!strcmp(buf, "clear\n") && | |
18864cc4 | 699 | (status & ACPI_EVENT_FLAG_STATUS_SET)) |
1c8fce27 | 700 | result = acpi_clear_event(event); |
c48b1565 LT |
701 | else if (!kstrtoul(buf, 0, &tmp)) |
702 | all_counters[index].count = tmp; | |
1c8fce27 | 703 | else |
c48b1565 | 704 | result = -EINVAL; |
1c8fce27 ZR |
705 | } else |
706 | all_counters[index].count = strtoul(buf, NULL, 0); | |
707 | ||
708 | if (ACPI_FAILURE(result)) | |
709 | result = -EINVAL; | |
710 | end: | |
711 | return result ? result : size; | |
712 | } | |
713 | ||
9c4aa1ee LZ |
714 | /* |
715 | * A Quirk Mechanism for GPE Flooding Prevention: | |
716 | * | |
717 | * Quirks may be needed to prevent GPE flooding on a specific GPE. The | |
718 | * flooding typically cannot be detected and automatically prevented by | |
719 | * ACPI_GPE_DISPATCH_NONE check because there is a _Lxx/_Exx prepared in | |
720 | * the AML tables. This normally indicates a feature gap in Linux, thus | |
721 | * instead of providing endless quirk tables, we provide a boot parameter | |
722 | * for those who want this quirk. For example, if the users want to prevent | |
723 | * the GPE flooding for GPE 00, they need to specify the following boot | |
724 | * parameter: | |
725 | * acpi_mask_gpe=0x00 | |
726 | * The masking status can be modified by the following runtime controlling | |
727 | * interface: | |
728 | * echo unmask > /sys/firmware/acpi/interrupts/gpe00 | |
729 | */ | |
730 | ||
731 | /* | |
732 | * Currently, the GPE flooding prevention only supports to mask the GPEs | |
733 | * numbered from 00 to 7f. | |
734 | */ | |
735 | #define ACPI_MASKABLE_GPE_MAX 0x80 | |
736 | ||
737 | static u64 __initdata acpi_masked_gpes; | |
738 | ||
739 | static int __init acpi_gpe_set_masked_gpes(char *val) | |
740 | { | |
741 | u8 gpe; | |
742 | ||
743 | if (kstrtou8(val, 0, &gpe) || gpe > ACPI_MASKABLE_GPE_MAX) | |
744 | return -EINVAL; | |
745 | acpi_masked_gpes |= ((u64)1<<gpe); | |
746 | ||
747 | return 1; | |
748 | } | |
749 | __setup("acpi_mask_gpe=", acpi_gpe_set_masked_gpes); | |
750 | ||
751 | void __init acpi_gpe_apply_masked_gpes(void) | |
752 | { | |
753 | acpi_handle handle; | |
754 | acpi_status status; | |
755 | u8 gpe; | |
756 | ||
757 | for (gpe = 0; | |
758 | gpe < min_t(u8, ACPI_MASKABLE_GPE_MAX, acpi_current_gpe_count); | |
759 | gpe++) { | |
760 | if (acpi_masked_gpes & ((u64)1<<gpe)) { | |
761 | status = acpi_get_gpe_device(gpe, &handle); | |
762 | if (ACPI_SUCCESS(status)) { | |
763 | pr_info("Masking GPE 0x%x.\n", gpe); | |
764 | (void)acpi_mask_gpe(handle, gpe, TRUE); | |
765 | } | |
766 | } | |
767 | } | |
768 | } | |
769 | ||
1c8fce27 ZR |
770 | void acpi_irq_stats_init(void) |
771 | { | |
a0fcdb23 | 772 | acpi_status status; |
1c8fce27 ZR |
773 | int i; |
774 | ||
775 | if (all_counters) | |
776 | return; | |
777 | ||
778 | num_gpes = acpi_current_gpe_count; | |
779 | num_counters = num_gpes + ACPI_NUM_FIXED_EVENTS + NUM_COUNTERS_EXTRA; | |
780 | ||
781 | all_attrs = kzalloc(sizeof(struct attribute *) * (num_counters + 1), | |
782 | GFP_KERNEL); | |
783 | if (all_attrs == NULL) | |
784 | return; | |
785 | ||
786 | all_counters = kzalloc(sizeof(struct event_counter) * (num_counters), | |
787 | GFP_KERNEL); | |
788 | if (all_counters == NULL) | |
789 | goto fail; | |
790 | ||
644ef74e | 791 | status = acpi_install_global_event_handler(acpi_global_event_handler, NULL); |
a0fcdb23 LM |
792 | if (ACPI_FAILURE(status)) |
793 | goto fail; | |
794 | ||
1c8fce27 ZR |
795 | counter_attrs = kzalloc(sizeof(struct kobj_attribute) * (num_counters), |
796 | GFP_KERNEL); | |
797 | if (counter_attrs == NULL) | |
798 | goto fail; | |
799 | ||
800 | for (i = 0; i < num_counters; ++i) { | |
801 | char buffer[12]; | |
802 | char *name; | |
803 | ||
804 | if (i < num_gpes) | |
805 | sprintf(buffer, "gpe%02X", i); | |
806 | else if (i == num_gpes + ACPI_EVENT_PMTIMER) | |
807 | sprintf(buffer, "ff_pmtimer"); | |
808 | else if (i == num_gpes + ACPI_EVENT_GLOBAL) | |
809 | sprintf(buffer, "ff_gbl_lock"); | |
810 | else if (i == num_gpes + ACPI_EVENT_POWER_BUTTON) | |
811 | sprintf(buffer, "ff_pwr_btn"); | |
812 | else if (i == num_gpes + ACPI_EVENT_SLEEP_BUTTON) | |
813 | sprintf(buffer, "ff_slp_btn"); | |
814 | else if (i == num_gpes + ACPI_EVENT_RTC) | |
815 | sprintf(buffer, "ff_rt_clk"); | |
816 | else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE) | |
817 | sprintf(buffer, "gpe_all"); | |
818 | else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI) | |
819 | sprintf(buffer, "sci"); | |
820 | else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI_NOT) | |
821 | sprintf(buffer, "sci_not"); | |
822 | else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR) | |
823 | sprintf(buffer, "error"); | |
824 | else | |
825 | sprintf(buffer, "bug%02X", i); | |
826 | ||
096a8aac | 827 | name = kstrdup(buffer, GFP_KERNEL); |
1c8fce27 ZR |
828 | if (name == NULL) |
829 | goto fail; | |
1c8fce27 ZR |
830 | |
831 | sysfs_attr_init(&counter_attrs[i].attr); | |
832 | counter_attrs[i].attr.name = name; | |
833 | counter_attrs[i].attr.mode = 0644; | |
834 | counter_attrs[i].show = counter_show; | |
835 | counter_attrs[i].store = counter_set; | |
836 | ||
837 | all_attrs[i] = &counter_attrs[i].attr; | |
838 | } | |
839 | ||
840 | interrupt_stats_attr_group.attrs = all_attrs; | |
841 | if (!sysfs_create_group(acpi_kobj, &interrupt_stats_attr_group)) | |
842 | return; | |
843 | ||
844 | fail: | |
845 | delete_gpe_attr_array(); | |
846 | return; | |
847 | } | |
848 | ||
849 | static void __exit interrupt_stats_exit(void) | |
850 | { | |
851 | sysfs_remove_group(acpi_kobj, &interrupt_stats_attr_group); | |
852 | ||
853 | delete_gpe_attr_array(); | |
854 | ||
855 | return; | |
856 | } | |
857 | ||
362b6460 TR |
858 | static ssize_t |
859 | acpi_show_profile(struct device *dev, struct device_attribute *attr, | |
860 | char *buf) | |
861 | { | |
862 | return sprintf(buf, "%d\n", acpi_gbl_FADT.preferred_profile); | |
863 | } | |
864 | ||
865 | static const struct device_attribute pm_profile_attr = | |
866 | __ATTR(pm_profile, S_IRUGO, acpi_show_profile, NULL); | |
867 | ||
3f8055c3 RW |
868 | static ssize_t hotplug_enabled_show(struct kobject *kobj, |
869 | struct kobj_attribute *attr, char *buf) | |
870 | { | |
871 | struct acpi_hotplug_profile *hotplug = to_acpi_hotplug_profile(kobj); | |
872 | ||
873 | return sprintf(buf, "%d\n", hotplug->enabled); | |
874 | } | |
875 | ||
876 | static ssize_t hotplug_enabled_store(struct kobject *kobj, | |
877 | struct kobj_attribute *attr, | |
878 | const char *buf, size_t size) | |
879 | { | |
880 | struct acpi_hotplug_profile *hotplug = to_acpi_hotplug_profile(kobj); | |
881 | unsigned int val; | |
882 | ||
883 | if (kstrtouint(buf, 10, &val) || val > 1) | |
884 | return -EINVAL; | |
885 | ||
886 | acpi_scan_hotplug_enabled(hotplug, val); | |
887 | return size; | |
888 | } | |
889 | ||
890 | static struct kobj_attribute hotplug_enabled_attr = | |
891 | __ATTR(enabled, S_IRUGO | S_IWUSR, hotplug_enabled_show, | |
892 | hotplug_enabled_store); | |
893 | ||
894 | static struct attribute *hotplug_profile_attrs[] = { | |
895 | &hotplug_enabled_attr.attr, | |
896 | NULL | |
897 | }; | |
898 | ||
b09753ec | 899 | static struct kobj_type acpi_hotplug_profile_ktype = { |
3f8055c3 RW |
900 | .sysfs_ops = &kobj_sysfs_ops, |
901 | .default_attrs = hotplug_profile_attrs, | |
902 | }; | |
903 | ||
904 | void acpi_sysfs_add_hotplug_profile(struct acpi_hotplug_profile *hotplug, | |
905 | const char *name) | |
906 | { | |
907 | int error; | |
908 | ||
909 | if (!hotplug_kobj) | |
910 | goto err_out; | |
911 | ||
acd3e2c9 BH |
912 | error = kobject_init_and_add(&hotplug->kobj, |
913 | &acpi_hotplug_profile_ktype, hotplug_kobj, "%s", name); | |
3f8055c3 RW |
914 | if (error) |
915 | goto err_out; | |
916 | ||
917 | kobject_uevent(&hotplug->kobj, KOBJ_ADD); | |
918 | return; | |
919 | ||
920 | err_out: | |
921 | pr_err(PREFIX "Unable to add hotplug profile '%s'\n", name); | |
922 | } | |
923 | ||
683058e3 RW |
924 | static ssize_t force_remove_show(struct kobject *kobj, |
925 | struct kobj_attribute *attr, char *buf) | |
926 | { | |
ffc10d82 | 927 | return sprintf(buf, "%d\n", 0); |
683058e3 RW |
928 | } |
929 | ||
930 | static ssize_t force_remove_store(struct kobject *kobj, | |
931 | struct kobj_attribute *attr, | |
932 | const char *buf, size_t size) | |
933 | { | |
934 | bool val; | |
935 | int ret; | |
936 | ||
937 | ret = strtobool(buf, &val); | |
938 | if (ret < 0) | |
939 | return ret; | |
940 | ||
ffc10d82 MH |
941 | if (val) { |
942 | pr_err("Enabling force_remove is not supported anymore. Please report to linux-acpi@vger.kernel.org if you depend on this functionality\n"); | |
943 | return -EINVAL; | |
944 | } | |
683058e3 RW |
945 | return size; |
946 | } | |
947 | ||
948 | static const struct kobj_attribute force_remove_attr = | |
949 | __ATTR(force_remove, S_IRUGO | S_IWUSR, force_remove_show, | |
950 | force_remove_store); | |
951 | ||
1c8fce27 ZR |
952 | int __init acpi_sysfs_init(void) |
953 | { | |
954 | int result; | |
955 | ||
956 | result = acpi_tables_sysfs_init(); | |
362b6460 TR |
957 | if (result) |
958 | return result; | |
3f8055c3 RW |
959 | |
960 | hotplug_kobj = kobject_create_and_add("hotplug", acpi_kobj); | |
bc1e49df IY |
961 | if (!hotplug_kobj) |
962 | return -ENOMEM; | |
963 | ||
683058e3 RW |
964 | result = sysfs_create_file(hotplug_kobj, &force_remove_attr.attr); |
965 | if (result) | |
966 | return result; | |
967 | ||
362b6460 | 968 | result = sysfs_create_file(acpi_kobj, &pm_profile_attr.attr); |
1c8fce27 ZR |
969 | return result; |
970 | } |