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[GitHub/exynos8895/android_kernel_samsung_universal8895.git] / drivers / acpi / sysfs.c
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, &param_ops_debug_layer, &acpi_dbg_layer, 0644);
165 module_param_cb(debug_level, &param_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, &param_ops_trace_method, &trace_method_name, 0644);
227 module_param_cb(trace_debug_layer, &param_ops_trace_attrib, &acpi_gbl_trace_dbg_layer, 0644);
228 module_param_cb(trace_debug_level, &param_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 static acpi_status
382 acpi_sysfs_table_handler(u32 event, void *table, void *context)
383 {
384 struct acpi_table_attr *table_attr;
385
386 switch (event) {
387 case ACPI_TABLE_EVENT_LOAD:
388 table_attr =
389 kzalloc(sizeof(struct acpi_table_attr), GFP_KERNEL);
390 if (!table_attr)
391 return AE_NO_MEMORY;
392
393 acpi_table_attr_init(table_attr, table);
394 if (sysfs_create_bin_file(dynamic_tables_kobj,
395 &table_attr->attr)) {
396 kfree(table_attr);
397 return AE_ERROR;
398 } else
399 list_add_tail(&table_attr->node, &acpi_table_attr_list);
400 break;
401 case ACPI_TABLE_EVENT_UNLOAD:
402 /*
403 * we do not need to do anything right now
404 * because the table is not deleted from the
405 * global table list when unloading it.
406 */
407 break;
408 default:
409 return AE_BAD_PARAMETER;
410 }
411 return AE_OK;
412 }
413
414 static int acpi_tables_sysfs_init(void)
415 {
416 struct acpi_table_attr *table_attr;
417 struct acpi_table_header *table_header = NULL;
418 int table_index;
419 acpi_status status;
420 int ret;
421
422 tables_kobj = kobject_create_and_add("tables", acpi_kobj);
423 if (!tables_kobj)
424 goto err;
425
426 dynamic_tables_kobj = kobject_create_and_add("dynamic", tables_kobj);
427 if (!dynamic_tables_kobj)
428 goto err_dynamic_tables;
429
430 for (table_index = 0;; table_index++) {
431 status = acpi_get_table_by_index(table_index, &table_header);
432
433 if (status == AE_BAD_PARAMETER)
434 break;
435
436 if (ACPI_FAILURE(status))
437 continue;
438
439 table_attr = NULL;
440 table_attr = kzalloc(sizeof(*table_attr), GFP_KERNEL);
441 if (!table_attr)
442 return -ENOMEM;
443
444 acpi_table_attr_init(table_attr, table_header);
445 ret = sysfs_create_bin_file(tables_kobj, &table_attr->attr);
446 if (ret) {
447 kfree(table_attr);
448 return ret;
449 }
450 list_add_tail(&table_attr->node, &acpi_table_attr_list);
451 }
452
453 kobject_uevent(tables_kobj, KOBJ_ADD);
454 kobject_uevent(dynamic_tables_kobj, KOBJ_ADD);
455 status = acpi_install_table_handler(acpi_sysfs_table_handler, NULL);
456
457 return ACPI_FAILURE(status) ? -EINVAL : 0;
458 err_dynamic_tables:
459 kobject_put(tables_kobj);
460 err:
461 return -ENOMEM;
462 }
463
464 /*
465 * Detailed ACPI IRQ counters:
466 * /sys/firmware/acpi/interrupts/
467 */
468
469 u32 acpi_irq_handled;
470 u32 acpi_irq_not_handled;
471
472 #define COUNT_GPE 0
473 #define COUNT_SCI 1 /* acpi_irq_handled */
474 #define COUNT_SCI_NOT 2 /* acpi_irq_not_handled */
475 #define COUNT_ERROR 3 /* other */
476 #define NUM_COUNTERS_EXTRA 4
477
478 struct event_counter {
479 u32 count;
480 u32 flags;
481 };
482
483 static struct event_counter *all_counters;
484 static u32 num_gpes;
485 static u32 num_counters;
486 static struct attribute **all_attrs;
487 static u32 acpi_gpe_count;
488
489 static struct attribute_group interrupt_stats_attr_group = {
490 .name = "interrupts",
491 };
492
493 static struct kobj_attribute *counter_attrs;
494
495 static void delete_gpe_attr_array(void)
496 {
497 struct event_counter *tmp = all_counters;
498
499 all_counters = NULL;
500 kfree(tmp);
501
502 if (counter_attrs) {
503 int i;
504
505 for (i = 0; i < num_gpes; i++)
506 kfree(counter_attrs[i].attr.name);
507
508 kfree(counter_attrs);
509 }
510 kfree(all_attrs);
511
512 return;
513 }
514
515 static void gpe_count(u32 gpe_number)
516 {
517 acpi_gpe_count++;
518
519 if (!all_counters)
520 return;
521
522 if (gpe_number < num_gpes)
523 all_counters[gpe_number].count++;
524 else
525 all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS +
526 COUNT_ERROR].count++;
527
528 return;
529 }
530
531 static void fixed_event_count(u32 event_number)
532 {
533 if (!all_counters)
534 return;
535
536 if (event_number < ACPI_NUM_FIXED_EVENTS)
537 all_counters[num_gpes + event_number].count++;
538 else
539 all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS +
540 COUNT_ERROR].count++;
541
542 return;
543 }
544
545 static void acpi_global_event_handler(u32 event_type, acpi_handle device,
546 u32 event_number, void *context)
547 {
548 if (event_type == ACPI_EVENT_TYPE_GPE)
549 gpe_count(event_number);
550
551 if (event_type == ACPI_EVENT_TYPE_FIXED)
552 fixed_event_count(event_number);
553 }
554
555 static int get_status(u32 index, acpi_event_status *status,
556 acpi_handle *handle)
557 {
558 int result;
559
560 if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS)
561 return -EINVAL;
562
563 if (index < num_gpes) {
564 result = acpi_get_gpe_device(index, handle);
565 if (result) {
566 ACPI_EXCEPTION((AE_INFO, AE_NOT_FOUND,
567 "Invalid GPE 0x%x", index));
568 return result;
569 }
570 result = acpi_get_gpe_status(*handle, index, status);
571 } else if (index < (num_gpes + ACPI_NUM_FIXED_EVENTS))
572 result = acpi_get_event_status(index - num_gpes, status);
573
574 return result;
575 }
576
577 static ssize_t counter_show(struct kobject *kobj,
578 struct kobj_attribute *attr, char *buf)
579 {
580 int index = attr - counter_attrs;
581 int size;
582 acpi_handle handle;
583 acpi_event_status status;
584 int result = 0;
585
586 all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI].count =
587 acpi_irq_handled;
588 all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI_NOT].count =
589 acpi_irq_not_handled;
590 all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE].count =
591 acpi_gpe_count;
592 size = sprintf(buf, "%8u", all_counters[index].count);
593
594 /* "gpe_all" or "sci" */
595 if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS)
596 goto end;
597
598 result = get_status(index, &status, &handle);
599 if (result)
600 goto end;
601
602 if (!(status & ACPI_EVENT_FLAG_HAS_HANDLER))
603 size += sprintf(buf + size, " invalid");
604 else if (status & ACPI_EVENT_FLAG_ENABLED)
605 size += sprintf(buf + size, " enabled");
606 else if (status & ACPI_EVENT_FLAG_WAKE_ENABLED)
607 size += sprintf(buf + size, " wake_enabled");
608 else
609 size += sprintf(buf + size, " disabled");
610
611 end:
612 size += sprintf(buf + size, "\n");
613 return result ? result : size;
614 }
615
616 /*
617 * counter_set() sets the specified counter.
618 * setting the total "sci" file to any value clears all counters.
619 * enable/disable/clear a gpe/fixed event in user space.
620 */
621 static ssize_t counter_set(struct kobject *kobj,
622 struct kobj_attribute *attr, const char *buf,
623 size_t size)
624 {
625 int index = attr - counter_attrs;
626 acpi_event_status status;
627 acpi_handle handle;
628 int result = 0;
629 unsigned long tmp;
630
631 if (index == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI) {
632 int i;
633 for (i = 0; i < num_counters; ++i)
634 all_counters[i].count = 0;
635 acpi_gpe_count = 0;
636 acpi_irq_handled = 0;
637 acpi_irq_not_handled = 0;
638 goto end;
639 }
640
641 /* show the event status for both GPEs and Fixed Events */
642 result = get_status(index, &status, &handle);
643 if (result)
644 goto end;
645
646 if (!(status & ACPI_EVENT_FLAG_HAS_HANDLER)) {
647 printk(KERN_WARNING PREFIX
648 "Can not change Invalid GPE/Fixed Event status\n");
649 return -EINVAL;
650 }
651
652 if (index < num_gpes) {
653 if (!strcmp(buf, "disable\n") &&
654 (status & ACPI_EVENT_FLAG_ENABLED))
655 result = acpi_disable_gpe(handle, index);
656 else if (!strcmp(buf, "enable\n") &&
657 !(status & ACPI_EVENT_FLAG_ENABLED))
658 result = acpi_enable_gpe(handle, index);
659 else if (!strcmp(buf, "clear\n") &&
660 (status & ACPI_EVENT_FLAG_SET))
661 result = acpi_clear_gpe(handle, index);
662 else if (!kstrtoul(buf, 0, &tmp))
663 all_counters[index].count = tmp;
664 else
665 result = -EINVAL;
666 } else if (index < num_gpes + ACPI_NUM_FIXED_EVENTS) {
667 int event = index - num_gpes;
668 if (!strcmp(buf, "disable\n") &&
669 (status & ACPI_EVENT_FLAG_ENABLED))
670 result = acpi_disable_event(event, ACPI_NOT_ISR);
671 else if (!strcmp(buf, "enable\n") &&
672 !(status & ACPI_EVENT_FLAG_ENABLED))
673 result = acpi_enable_event(event, ACPI_NOT_ISR);
674 else if (!strcmp(buf, "clear\n") &&
675 (status & ACPI_EVENT_FLAG_SET))
676 result = acpi_clear_event(event);
677 else if (!kstrtoul(buf, 0, &tmp))
678 all_counters[index].count = tmp;
679 else
680 result = -EINVAL;
681 } else
682 all_counters[index].count = strtoul(buf, NULL, 0);
683
684 if (ACPI_FAILURE(result))
685 result = -EINVAL;
686 end:
687 return result ? result : size;
688 }
689
690 void acpi_irq_stats_init(void)
691 {
692 acpi_status status;
693 int i;
694
695 if (all_counters)
696 return;
697
698 num_gpes = acpi_current_gpe_count;
699 num_counters = num_gpes + ACPI_NUM_FIXED_EVENTS + NUM_COUNTERS_EXTRA;
700
701 all_attrs = kzalloc(sizeof(struct attribute *) * (num_counters + 1),
702 GFP_KERNEL);
703 if (all_attrs == NULL)
704 return;
705
706 all_counters = kzalloc(sizeof(struct event_counter) * (num_counters),
707 GFP_KERNEL);
708 if (all_counters == NULL)
709 goto fail;
710
711 status = acpi_install_global_event_handler(acpi_global_event_handler, NULL);
712 if (ACPI_FAILURE(status))
713 goto fail;
714
715 counter_attrs = kzalloc(sizeof(struct kobj_attribute) * (num_counters),
716 GFP_KERNEL);
717 if (counter_attrs == NULL)
718 goto fail;
719
720 for (i = 0; i < num_counters; ++i) {
721 char buffer[12];
722 char *name;
723
724 if (i < num_gpes)
725 sprintf(buffer, "gpe%02X", i);
726 else if (i == num_gpes + ACPI_EVENT_PMTIMER)
727 sprintf(buffer, "ff_pmtimer");
728 else if (i == num_gpes + ACPI_EVENT_GLOBAL)
729 sprintf(buffer, "ff_gbl_lock");
730 else if (i == num_gpes + ACPI_EVENT_POWER_BUTTON)
731 sprintf(buffer, "ff_pwr_btn");
732 else if (i == num_gpes + ACPI_EVENT_SLEEP_BUTTON)
733 sprintf(buffer, "ff_slp_btn");
734 else if (i == num_gpes + ACPI_EVENT_RTC)
735 sprintf(buffer, "ff_rt_clk");
736 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE)
737 sprintf(buffer, "gpe_all");
738 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI)
739 sprintf(buffer, "sci");
740 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI_NOT)
741 sprintf(buffer, "sci_not");
742 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR)
743 sprintf(buffer, "error");
744 else
745 sprintf(buffer, "bug%02X", i);
746
747 name = kstrdup(buffer, GFP_KERNEL);
748 if (name == NULL)
749 goto fail;
750
751 sysfs_attr_init(&counter_attrs[i].attr);
752 counter_attrs[i].attr.name = name;
753 counter_attrs[i].attr.mode = 0644;
754 counter_attrs[i].show = counter_show;
755 counter_attrs[i].store = counter_set;
756
757 all_attrs[i] = &counter_attrs[i].attr;
758 }
759
760 interrupt_stats_attr_group.attrs = all_attrs;
761 if (!sysfs_create_group(acpi_kobj, &interrupt_stats_attr_group))
762 return;
763
764 fail:
765 delete_gpe_attr_array();
766 return;
767 }
768
769 static void __exit interrupt_stats_exit(void)
770 {
771 sysfs_remove_group(acpi_kobj, &interrupt_stats_attr_group);
772
773 delete_gpe_attr_array();
774
775 return;
776 }
777
778 static ssize_t
779 acpi_show_profile(struct device *dev, struct device_attribute *attr,
780 char *buf)
781 {
782 return sprintf(buf, "%d\n", acpi_gbl_FADT.preferred_profile);
783 }
784
785 static const struct device_attribute pm_profile_attr =
786 __ATTR(pm_profile, S_IRUGO, acpi_show_profile, NULL);
787
788 static ssize_t hotplug_enabled_show(struct kobject *kobj,
789 struct kobj_attribute *attr, char *buf)
790 {
791 struct acpi_hotplug_profile *hotplug = to_acpi_hotplug_profile(kobj);
792
793 return sprintf(buf, "%d\n", hotplug->enabled);
794 }
795
796 static ssize_t hotplug_enabled_store(struct kobject *kobj,
797 struct kobj_attribute *attr,
798 const char *buf, size_t size)
799 {
800 struct acpi_hotplug_profile *hotplug = to_acpi_hotplug_profile(kobj);
801 unsigned int val;
802
803 if (kstrtouint(buf, 10, &val) || val > 1)
804 return -EINVAL;
805
806 acpi_scan_hotplug_enabled(hotplug, val);
807 return size;
808 }
809
810 static struct kobj_attribute hotplug_enabled_attr =
811 __ATTR(enabled, S_IRUGO | S_IWUSR, hotplug_enabled_show,
812 hotplug_enabled_store);
813
814 static struct attribute *hotplug_profile_attrs[] = {
815 &hotplug_enabled_attr.attr,
816 NULL
817 };
818
819 static struct kobj_type acpi_hotplug_profile_ktype = {
820 .sysfs_ops = &kobj_sysfs_ops,
821 .default_attrs = hotplug_profile_attrs,
822 };
823
824 void acpi_sysfs_add_hotplug_profile(struct acpi_hotplug_profile *hotplug,
825 const char *name)
826 {
827 int error;
828
829 if (!hotplug_kobj)
830 goto err_out;
831
832 error = kobject_init_and_add(&hotplug->kobj,
833 &acpi_hotplug_profile_ktype, hotplug_kobj, "%s", name);
834 if (error)
835 goto err_out;
836
837 kobject_uevent(&hotplug->kobj, KOBJ_ADD);
838 return;
839
840 err_out:
841 pr_err(PREFIX "Unable to add hotplug profile '%s'\n", name);
842 }
843
844 static ssize_t force_remove_show(struct kobject *kobj,
845 struct kobj_attribute *attr, char *buf)
846 {
847 return sprintf(buf, "%d\n", !!acpi_force_hot_remove);
848 }
849
850 static ssize_t force_remove_store(struct kobject *kobj,
851 struct kobj_attribute *attr,
852 const char *buf, size_t size)
853 {
854 bool val;
855 int ret;
856
857 ret = strtobool(buf, &val);
858 if (ret < 0)
859 return ret;
860
861 lock_device_hotplug();
862 acpi_force_hot_remove = val;
863 unlock_device_hotplug();
864 return size;
865 }
866
867 static const struct kobj_attribute force_remove_attr =
868 __ATTR(force_remove, S_IRUGO | S_IWUSR, force_remove_show,
869 force_remove_store);
870
871 int __init acpi_sysfs_init(void)
872 {
873 int result;
874
875 result = acpi_tables_sysfs_init();
876 if (result)
877 return result;
878
879 hotplug_kobj = kobject_create_and_add("hotplug", acpi_kobj);
880 if (!hotplug_kobj)
881 return -ENOMEM;
882
883 result = sysfs_create_file(hotplug_kobj, &force_remove_attr.attr);
884 if (result)
885 return result;
886
887 result = sysfs_create_file(acpi_kobj, &pm_profile_attr.attr);
888 return result;
889 }