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Commit | Line | Data |
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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> | |
8 | #include <linux/acpi.h> | |
9 | ||
10 | #include "internal.h" | |
11 | ||
12 | #define _COMPONENT ACPI_SYSTEM_COMPONENT | |
13 | ACPI_MODULE_NAME("sysfs"); | |
14 | ||
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), | |
72 | ACPI_DEBUG_INIT(ACPI_LV_REPAIR), | |
73 | ACPI_DEBUG_INIT(ACPI_LV_TRACE_POINT), | |
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 | ||
105 | static int param_get_debug_layer(char *buffer, const struct kernel_param *kp) | |
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 | ||
133 | static int param_get_debug_level(char *buffer, const struct kernel_param *kp) | |
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 | ||
154 | static const struct kernel_param_ops param_ops_debug_layer = { | |
155 | .set = param_set_uint, | |
156 | .get = param_get_debug_layer, | |
157 | }; | |
158 | ||
159 | static const struct kernel_param_ops param_ops_debug_level = { | |
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); | |
166 | ||
167 | static char trace_method_name[1024]; | |
168 | ||
169 | int param_set_trace_method_name(const char *val, const struct kernel_param *kp) | |
170 | { | |
171 | u32 saved_flags = 0; | |
172 | bool is_abs_path = true; | |
173 | ||
174 | if (*val != '\\') | |
175 | is_abs_path = false; | |
176 | ||
177 | if ((is_abs_path && strlen(val) > 1023) || | |
178 | (!is_abs_path && strlen(val) > 1022)) { | |
179 | pr_err("%s: string parameter too long\n", kp->name); | |
180 | return -ENOSPC; | |
181 | } | |
182 | ||
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 | ||
194 | /* This is a hack. We can't kmalloc in early boot. */ | |
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 | } | |
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); | |
207 | ||
208 | return 0; | |
209 | } | |
210 | ||
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; | |
264 | } | |
265 | ||
266 | static int param_get_trace_state(char *buffer, struct kernel_param *kp) | |
267 | { | |
268 | if (!(acpi_gbl_trace_flags & ACPI_TRACE_ENABLED)) | |
269 | return sprintf(buffer, "disable"); | |
270 | else { | |
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 | |
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 | ||
286 | ||
287 | /* /sys/modules/acpi/parameters/aml_debug_output */ | |
288 | ||
289 | module_param_named(aml_debug_output, acpi_gbl_enable_aml_debug_object, | |
290 | byte, 0644); | |
291 | MODULE_PARM_DESC(aml_debug_output, | |
292 | "To enable/disable the ACPI Debug Object output."); | |
293 | ||
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; | |
315 | static struct kobject *hotplug_kobj; | |
316 | ||
317 | struct acpi_table_attr { | |
318 | struct bin_attribute attr; | |
319 | char name[8]; | |
320 | int instance; | |
321 | struct list_head node; | |
322 | }; | |
323 | ||
324 | static ssize_t acpi_table_show(struct file *filp, struct kobject *kobj, | |
325 | struct bin_attribute *bin_attr, char *buf, | |
326 | loff_t offset, size_t count) | |
327 | { | |
328 | struct acpi_table_attr *table_attr = | |
329 | container_of(bin_attr, struct acpi_table_attr, attr); | |
330 | struct acpi_table_header *table_header = NULL; | |
331 | acpi_status status; | |
332 | char name[ACPI_NAME_SIZE]; | |
333 | ||
334 | if (strncmp(table_attr->name, "NULL", 4)) | |
335 | memcpy(name, table_attr->name, ACPI_NAME_SIZE); | |
336 | else | |
337 | memcpy(name, "\0\0\0\0", 4); | |
338 | ||
339 | status = acpi_get_table(name, table_attr->instance, &table_header); | |
340 | if (ACPI_FAILURE(status)) | |
341 | return -ENODEV; | |
342 | ||
343 | return memory_read_from_buffer(buf, count, &offset, | |
344 | table_header, table_header->length); | |
345 | } | |
346 | ||
347 | static void acpi_table_attr_init(struct acpi_table_attr *table_attr, | |
348 | struct acpi_table_header *table_header) | |
349 | { | |
350 | struct acpi_table_header *header = NULL; | |
351 | struct acpi_table_attr *attr = NULL; | |
352 | ||
353 | sysfs_attr_init(&table_attr->attr.attr); | |
354 | if (table_header->signature[0] != '\0') | |
355 | memcpy(table_attr->name, table_header->signature, | |
356 | ACPI_NAME_SIZE); | |
357 | else | |
358 | memcpy(table_attr->name, "NULL", 4); | |
359 | ||
360 | list_for_each_entry(attr, &acpi_table_attr_list, node) { | |
361 | if (!memcmp(table_attr->name, attr->name, ACPI_NAME_SIZE)) | |
362 | if (table_attr->instance < attr->instance) | |
363 | table_attr->instance = attr->instance; | |
364 | } | |
365 | table_attr->instance++; | |
366 | ||
367 | if (table_attr->instance > 1 || (table_attr->instance == 1 && | |
368 | !acpi_get_table | |
369 | (table_header->signature, 2, &header))) | |
370 | sprintf(table_attr->name + ACPI_NAME_SIZE, "%d", | |
371 | table_attr->instance); | |
372 | ||
373 | table_attr->attr.size = table_header->length; | |
374 | table_attr->attr.read = acpi_table_show; | |
375 | table_attr->attr.attr.name = table_attr->name; | |
376 | table_attr->attr.attr.mode = 0400; | |
377 | ||
378 | return; | |
379 | } | |
380 | ||
381 | acpi_status acpi_sysfs_table_handler(u32 event, void *table, void *context) | |
382 | { | |
383 | struct acpi_table_attr *table_attr; | |
384 | ||
385 | switch (event) { | |
386 | case ACPI_TABLE_EVENT_LOAD: | |
387 | table_attr = | |
388 | kzalloc(sizeof(struct acpi_table_attr), GFP_KERNEL); | |
389 | if (!table_attr) | |
390 | return AE_NO_MEMORY; | |
391 | ||
392 | acpi_table_attr_init(table_attr, table); | |
393 | if (sysfs_create_bin_file(dynamic_tables_kobj, | |
394 | &table_attr->attr)) { | |
395 | kfree(table_attr); | |
396 | return AE_ERROR; | |
397 | } else | |
398 | list_add_tail(&table_attr->node, &acpi_table_attr_list); | |
399 | break; | |
400 | case ACPI_TABLE_EVENT_UNLOAD: | |
401 | /* | |
402 | * we do not need to do anything right now | |
403 | * because the table is not deleted from the | |
404 | * global table list when unloading it. | |
405 | */ | |
406 | break; | |
407 | default: | |
408 | return AE_BAD_PARAMETER; | |
409 | } | |
410 | return AE_OK; | |
411 | } | |
412 | ||
413 | static int acpi_tables_sysfs_init(void) | |
414 | { | |
415 | struct acpi_table_attr *table_attr; | |
416 | struct acpi_table_header *table_header = NULL; | |
417 | int table_index; | |
418 | acpi_status status; | |
419 | int ret; | |
420 | ||
421 | tables_kobj = kobject_create_and_add("tables", acpi_kobj); | |
422 | if (!tables_kobj) | |
423 | goto err; | |
424 | ||
425 | dynamic_tables_kobj = kobject_create_and_add("dynamic", tables_kobj); | |
426 | if (!dynamic_tables_kobj) | |
427 | goto err_dynamic_tables; | |
428 | ||
429 | for (table_index = 0;; table_index++) { | |
430 | status = acpi_get_table_by_index(table_index, &table_header); | |
431 | ||
432 | if (status == AE_BAD_PARAMETER) | |
433 | break; | |
434 | ||
435 | if (ACPI_FAILURE(status)) | |
436 | continue; | |
437 | ||
438 | table_attr = NULL; | |
439 | table_attr = kzalloc(sizeof(*table_attr), GFP_KERNEL); | |
440 | if (!table_attr) | |
441 | return -ENOMEM; | |
442 | ||
443 | acpi_table_attr_init(table_attr, table_header); | |
444 | ret = sysfs_create_bin_file(tables_kobj, &table_attr->attr); | |
445 | if (ret) { | |
446 | kfree(table_attr); | |
447 | return ret; | |
448 | } | |
449 | list_add_tail(&table_attr->node, &acpi_table_attr_list); | |
450 | } | |
451 | ||
452 | kobject_uevent(tables_kobj, KOBJ_ADD); | |
453 | kobject_uevent(dynamic_tables_kobj, KOBJ_ADD); | |
454 | ||
455 | return 0; | |
456 | err_dynamic_tables: | |
457 | kobject_put(tables_kobj); | |
458 | err: | |
459 | return -ENOMEM; | |
460 | } | |
461 | ||
462 | /* | |
463 | * Detailed ACPI IRQ counters: | |
464 | * /sys/firmware/acpi/interrupts/ | |
465 | */ | |
466 | ||
467 | u32 acpi_irq_handled; | |
468 | u32 acpi_irq_not_handled; | |
469 | ||
470 | #define COUNT_GPE 0 | |
471 | #define COUNT_SCI 1 /* acpi_irq_handled */ | |
472 | #define COUNT_SCI_NOT 2 /* acpi_irq_not_handled */ | |
473 | #define COUNT_ERROR 3 /* other */ | |
474 | #define NUM_COUNTERS_EXTRA 4 | |
475 | ||
476 | struct event_counter { | |
477 | u32 count; | |
478 | u32 flags; | |
479 | }; | |
480 | ||
481 | static struct event_counter *all_counters; | |
482 | static u32 num_gpes; | |
483 | static u32 num_counters; | |
484 | static struct attribute **all_attrs; | |
485 | static u32 acpi_gpe_count; | |
486 | ||
487 | static struct attribute_group interrupt_stats_attr_group = { | |
488 | .name = "interrupts", | |
489 | }; | |
490 | ||
491 | static struct kobj_attribute *counter_attrs; | |
492 | ||
493 | static void delete_gpe_attr_array(void) | |
494 | { | |
495 | struct event_counter *tmp = all_counters; | |
496 | ||
497 | all_counters = NULL; | |
498 | kfree(tmp); | |
499 | ||
500 | if (counter_attrs) { | |
501 | int i; | |
502 | ||
503 | for (i = 0; i < num_gpes; i++) | |
504 | kfree(counter_attrs[i].attr.name); | |
505 | ||
506 | kfree(counter_attrs); | |
507 | } | |
508 | kfree(all_attrs); | |
509 | ||
510 | return; | |
511 | } | |
512 | ||
513 | static void gpe_count(u32 gpe_number) | |
514 | { | |
515 | acpi_gpe_count++; | |
516 | ||
517 | if (!all_counters) | |
518 | return; | |
519 | ||
520 | if (gpe_number < num_gpes) | |
521 | all_counters[gpe_number].count++; | |
522 | else | |
523 | all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + | |
524 | COUNT_ERROR].count++; | |
525 | ||
526 | return; | |
527 | } | |
528 | ||
529 | static void fixed_event_count(u32 event_number) | |
530 | { | |
531 | if (!all_counters) | |
532 | return; | |
533 | ||
534 | if (event_number < ACPI_NUM_FIXED_EVENTS) | |
535 | all_counters[num_gpes + event_number].count++; | |
536 | else | |
537 | all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + | |
538 | COUNT_ERROR].count++; | |
539 | ||
540 | return; | |
541 | } | |
542 | ||
543 | static void acpi_global_event_handler(u32 event_type, acpi_handle device, | |
544 | u32 event_number, void *context) | |
545 | { | |
546 | if (event_type == ACPI_EVENT_TYPE_GPE) | |
547 | gpe_count(event_number); | |
548 | ||
549 | if (event_type == ACPI_EVENT_TYPE_FIXED) | |
550 | fixed_event_count(event_number); | |
551 | } | |
552 | ||
553 | static int get_status(u32 index, acpi_event_status *status, | |
554 | acpi_handle *handle) | |
555 | { | |
556 | int result; | |
557 | ||
558 | if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS) | |
559 | return -EINVAL; | |
560 | ||
561 | if (index < num_gpes) { | |
562 | result = acpi_get_gpe_device(index, handle); | |
563 | if (result) { | |
564 | ACPI_EXCEPTION((AE_INFO, AE_NOT_FOUND, | |
565 | "Invalid GPE 0x%x", index)); | |
566 | return result; | |
567 | } | |
568 | result = acpi_get_gpe_status(*handle, index, status); | |
569 | } else if (index < (num_gpes + ACPI_NUM_FIXED_EVENTS)) | |
570 | result = acpi_get_event_status(index - num_gpes, status); | |
571 | ||
572 | return result; | |
573 | } | |
574 | ||
575 | static ssize_t counter_show(struct kobject *kobj, | |
576 | struct kobj_attribute *attr, char *buf) | |
577 | { | |
578 | int index = attr - counter_attrs; | |
579 | int size; | |
580 | acpi_handle handle; | |
581 | acpi_event_status status; | |
582 | int result = 0; | |
583 | ||
584 | all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI].count = | |
585 | acpi_irq_handled; | |
586 | all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI_NOT].count = | |
587 | acpi_irq_not_handled; | |
588 | all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE].count = | |
589 | acpi_gpe_count; | |
590 | size = sprintf(buf, "%8u", all_counters[index].count); | |
591 | ||
592 | /* "gpe_all" or "sci" */ | |
593 | if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS) | |
594 | goto end; | |
595 | ||
596 | result = get_status(index, &status, &handle); | |
597 | if (result) | |
598 | goto end; | |
599 | ||
600 | if (status & ACPI_EVENT_FLAG_ENABLE_SET) | |
601 | size += sprintf(buf + size, " EN"); | |
602 | else | |
603 | size += sprintf(buf + size, " "); | |
604 | if (status & ACPI_EVENT_FLAG_STATUS_SET) | |
605 | size += sprintf(buf + size, " STS"); | |
606 | else | |
607 | size += sprintf(buf + size, " "); | |
608 | ||
609 | if (!(status & ACPI_EVENT_FLAG_HAS_HANDLER)) | |
610 | size += sprintf(buf + size, " invalid "); | |
611 | else if (status & ACPI_EVENT_FLAG_ENABLED) | |
612 | size += sprintf(buf + size, " enabled "); | |
613 | else if (status & ACPI_EVENT_FLAG_WAKE_ENABLED) | |
614 | size += sprintf(buf + size, " wake_enabled"); | |
615 | else | |
616 | size += sprintf(buf + size, " disabled "); | |
617 | if (status & ACPI_EVENT_FLAG_MASKED) | |
618 | size += sprintf(buf + size, " masked "); | |
619 | else | |
620 | size += sprintf(buf + size, " unmasked"); | |
621 | ||
622 | end: | |
623 | size += sprintf(buf + size, "\n"); | |
624 | return result ? result : size; | |
625 | } | |
626 | ||
627 | /* | |
628 | * counter_set() sets the specified counter. | |
629 | * setting the total "sci" file to any value clears all counters. | |
630 | * enable/disable/clear a gpe/fixed event in user space. | |
631 | */ | |
632 | static ssize_t counter_set(struct kobject *kobj, | |
633 | struct kobj_attribute *attr, const char *buf, | |
634 | size_t size) | |
635 | { | |
636 | int index = attr - counter_attrs; | |
637 | acpi_event_status status; | |
638 | acpi_handle handle; | |
639 | int result = 0; | |
640 | unsigned long tmp; | |
641 | ||
642 | if (index == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI) { | |
643 | int i; | |
644 | for (i = 0; i < num_counters; ++i) | |
645 | all_counters[i].count = 0; | |
646 | acpi_gpe_count = 0; | |
647 | acpi_irq_handled = 0; | |
648 | acpi_irq_not_handled = 0; | |
649 | goto end; | |
650 | } | |
651 | ||
652 | /* show the event status for both GPEs and Fixed Events */ | |
653 | result = get_status(index, &status, &handle); | |
654 | if (result) | |
655 | goto end; | |
656 | ||
657 | if (!(status & ACPI_EVENT_FLAG_HAS_HANDLER)) { | |
658 | printk(KERN_WARNING PREFIX | |
659 | "Can not change Invalid GPE/Fixed Event status\n"); | |
660 | return -EINVAL; | |
661 | } | |
662 | ||
663 | if (index < num_gpes) { | |
664 | if (!strcmp(buf, "disable\n") && | |
665 | (status & ACPI_EVENT_FLAG_ENABLED)) | |
666 | result = acpi_disable_gpe(handle, index); | |
667 | else if (!strcmp(buf, "enable\n") && | |
668 | !(status & ACPI_EVENT_FLAG_ENABLED)) | |
669 | result = acpi_enable_gpe(handle, index); | |
670 | else if (!strcmp(buf, "clear\n") && | |
671 | (status & ACPI_EVENT_FLAG_STATUS_SET)) | |
672 | result = acpi_clear_gpe(handle, index); | |
673 | else if (!strcmp(buf, "mask\n")) | |
674 | result = acpi_mask_gpe(handle, index, TRUE); | |
675 | else if (!strcmp(buf, "unmask\n")) | |
676 | result = acpi_mask_gpe(handle, index, FALSE); | |
677 | else if (!kstrtoul(buf, 0, &tmp)) | |
678 | all_counters[index].count = tmp; | |
679 | else | |
680 | result = -EINVAL; | |
681 | } else if (index < num_gpes + ACPI_NUM_FIXED_EVENTS) { | |
682 | int event = index - num_gpes; | |
683 | if (!strcmp(buf, "disable\n") && | |
684 | (status & ACPI_EVENT_FLAG_ENABLE_SET)) | |
685 | result = acpi_disable_event(event, ACPI_NOT_ISR); | |
686 | else if (!strcmp(buf, "enable\n") && | |
687 | !(status & ACPI_EVENT_FLAG_ENABLE_SET)) | |
688 | result = acpi_enable_event(event, ACPI_NOT_ISR); | |
689 | else if (!strcmp(buf, "clear\n") && | |
690 | (status & ACPI_EVENT_FLAG_STATUS_SET)) | |
691 | result = acpi_clear_event(event); | |
692 | else if (!kstrtoul(buf, 0, &tmp)) | |
693 | all_counters[index].count = tmp; | |
694 | else | |
695 | result = -EINVAL; | |
696 | } else | |
697 | all_counters[index].count = strtoul(buf, NULL, 0); | |
698 | ||
699 | if (ACPI_FAILURE(result)) | |
700 | result = -EINVAL; | |
701 | end: | |
702 | return result ? result : size; | |
703 | } | |
704 | ||
705 | void acpi_irq_stats_init(void) | |
706 | { | |
707 | acpi_status status; | |
708 | int i; | |
709 | ||
710 | if (all_counters) | |
711 | return; | |
712 | ||
713 | num_gpes = acpi_current_gpe_count; | |
714 | num_counters = num_gpes + ACPI_NUM_FIXED_EVENTS + NUM_COUNTERS_EXTRA; | |
715 | ||
716 | all_attrs = kzalloc(sizeof(struct attribute *) * (num_counters + 1), | |
717 | GFP_KERNEL); | |
718 | if (all_attrs == NULL) | |
719 | return; | |
720 | ||
721 | all_counters = kzalloc(sizeof(struct event_counter) * (num_counters), | |
722 | GFP_KERNEL); | |
723 | if (all_counters == NULL) | |
724 | goto fail; | |
725 | ||
726 | status = acpi_install_global_event_handler(acpi_global_event_handler, NULL); | |
727 | if (ACPI_FAILURE(status)) | |
728 | goto fail; | |
729 | ||
730 | counter_attrs = kzalloc(sizeof(struct kobj_attribute) * (num_counters), | |
731 | GFP_KERNEL); | |
732 | if (counter_attrs == NULL) | |
733 | goto fail; | |
734 | ||
735 | for (i = 0; i < num_counters; ++i) { | |
736 | char buffer[12]; | |
737 | char *name; | |
738 | ||
739 | if (i < num_gpes) | |
740 | sprintf(buffer, "gpe%02X", i); | |
741 | else if (i == num_gpes + ACPI_EVENT_PMTIMER) | |
742 | sprintf(buffer, "ff_pmtimer"); | |
743 | else if (i == num_gpes + ACPI_EVENT_GLOBAL) | |
744 | sprintf(buffer, "ff_gbl_lock"); | |
745 | else if (i == num_gpes + ACPI_EVENT_POWER_BUTTON) | |
746 | sprintf(buffer, "ff_pwr_btn"); | |
747 | else if (i == num_gpes + ACPI_EVENT_SLEEP_BUTTON) | |
748 | sprintf(buffer, "ff_slp_btn"); | |
749 | else if (i == num_gpes + ACPI_EVENT_RTC) | |
750 | sprintf(buffer, "ff_rt_clk"); | |
751 | else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE) | |
752 | sprintf(buffer, "gpe_all"); | |
753 | else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI) | |
754 | sprintf(buffer, "sci"); | |
755 | else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI_NOT) | |
756 | sprintf(buffer, "sci_not"); | |
757 | else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR) | |
758 | sprintf(buffer, "error"); | |
759 | else | |
760 | sprintf(buffer, "bug%02X", i); | |
761 | ||
762 | name = kstrdup(buffer, GFP_KERNEL); | |
763 | if (name == NULL) | |
764 | goto fail; | |
765 | ||
766 | sysfs_attr_init(&counter_attrs[i].attr); | |
767 | counter_attrs[i].attr.name = name; | |
768 | counter_attrs[i].attr.mode = 0644; | |
769 | counter_attrs[i].show = counter_show; | |
770 | counter_attrs[i].store = counter_set; | |
771 | ||
772 | all_attrs[i] = &counter_attrs[i].attr; | |
773 | } | |
774 | ||
775 | interrupt_stats_attr_group.attrs = all_attrs; | |
776 | if (!sysfs_create_group(acpi_kobj, &interrupt_stats_attr_group)) | |
777 | return; | |
778 | ||
779 | fail: | |
780 | delete_gpe_attr_array(); | |
781 | return; | |
782 | } | |
783 | ||
784 | static void __exit interrupt_stats_exit(void) | |
785 | { | |
786 | sysfs_remove_group(acpi_kobj, &interrupt_stats_attr_group); | |
787 | ||
788 | delete_gpe_attr_array(); | |
789 | ||
790 | return; | |
791 | } | |
792 | ||
793 | static ssize_t | |
794 | acpi_show_profile(struct device *dev, struct device_attribute *attr, | |
795 | char *buf) | |
796 | { | |
797 | return sprintf(buf, "%d\n", acpi_gbl_FADT.preferred_profile); | |
798 | } | |
799 | ||
800 | static const struct device_attribute pm_profile_attr = | |
801 | __ATTR(pm_profile, S_IRUGO, acpi_show_profile, NULL); | |
802 | ||
803 | static ssize_t hotplug_enabled_show(struct kobject *kobj, | |
804 | struct kobj_attribute *attr, char *buf) | |
805 | { | |
806 | struct acpi_hotplug_profile *hotplug = to_acpi_hotplug_profile(kobj); | |
807 | ||
808 | return sprintf(buf, "%d\n", hotplug->enabled); | |
809 | } | |
810 | ||
811 | static ssize_t hotplug_enabled_store(struct kobject *kobj, | |
812 | struct kobj_attribute *attr, | |
813 | const char *buf, size_t size) | |
814 | { | |
815 | struct acpi_hotplug_profile *hotplug = to_acpi_hotplug_profile(kobj); | |
816 | unsigned int val; | |
817 | ||
818 | if (kstrtouint(buf, 10, &val) || val > 1) | |
819 | return -EINVAL; | |
820 | ||
821 | acpi_scan_hotplug_enabled(hotplug, val); | |
822 | return size; | |
823 | } | |
824 | ||
825 | static struct kobj_attribute hotplug_enabled_attr = | |
826 | __ATTR(enabled, S_IRUGO | S_IWUSR, hotplug_enabled_show, | |
827 | hotplug_enabled_store); | |
828 | ||
829 | static struct attribute *hotplug_profile_attrs[] = { | |
830 | &hotplug_enabled_attr.attr, | |
831 | NULL | |
832 | }; | |
833 | ||
834 | static struct kobj_type acpi_hotplug_profile_ktype = { | |
835 | .sysfs_ops = &kobj_sysfs_ops, | |
836 | .default_attrs = hotplug_profile_attrs, | |
837 | }; | |
838 | ||
839 | void acpi_sysfs_add_hotplug_profile(struct acpi_hotplug_profile *hotplug, | |
840 | const char *name) | |
841 | { | |
842 | int error; | |
843 | ||
844 | if (!hotplug_kobj) | |
845 | goto err_out; | |
846 | ||
847 | error = kobject_init_and_add(&hotplug->kobj, | |
848 | &acpi_hotplug_profile_ktype, hotplug_kobj, "%s", name); | |
849 | if (error) | |
850 | goto err_out; | |
851 | ||
852 | kobject_uevent(&hotplug->kobj, KOBJ_ADD); | |
853 | return; | |
854 | ||
855 | err_out: | |
856 | pr_err(PREFIX "Unable to add hotplug profile '%s'\n", name); | |
857 | } | |
858 | ||
859 | static ssize_t force_remove_show(struct kobject *kobj, | |
860 | struct kobj_attribute *attr, char *buf) | |
861 | { | |
862 | return sprintf(buf, "%d\n", !!acpi_force_hot_remove); | |
863 | } | |
864 | ||
865 | static ssize_t force_remove_store(struct kobject *kobj, | |
866 | struct kobj_attribute *attr, | |
867 | const char *buf, size_t size) | |
868 | { | |
869 | bool val; | |
870 | int ret; | |
871 | ||
872 | ret = strtobool(buf, &val); | |
873 | if (ret < 0) | |
874 | return ret; | |
875 | ||
876 | lock_device_hotplug(); | |
877 | acpi_force_hot_remove = val; | |
878 | unlock_device_hotplug(); | |
879 | return size; | |
880 | } | |
881 | ||
882 | static const struct kobj_attribute force_remove_attr = | |
883 | __ATTR(force_remove, S_IRUGO | S_IWUSR, force_remove_show, | |
884 | force_remove_store); | |
885 | ||
886 | int __init acpi_sysfs_init(void) | |
887 | { | |
888 | int result; | |
889 | ||
890 | result = acpi_tables_sysfs_init(); | |
891 | if (result) | |
892 | return result; | |
893 | ||
894 | hotplug_kobj = kobject_create_and_add("hotplug", acpi_kobj); | |
895 | if (!hotplug_kobj) | |
896 | return -ENOMEM; | |
897 | ||
898 | result = sysfs_create_file(hotplug_kobj, &force_remove_attr.attr); | |
899 | if (result) | |
900 | return result; | |
901 | ||
902 | result = sysfs_create_file(acpi_kobj, &pm_profile_attr.attr); | |
903 | return result; | |
904 | } |