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