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mm/page_alloc: prevent merging between isolated and other pageblocks
[linux-2.6-block.git] / drivers / acpi / sysfs.c
CommitLineData
1c8fce27
ZR		 1/*
2 * sysfs.c - ACPI sysfs interface to userspace.
3 */
4
5#include <linux/init.h>
6#include <linux/kernel.h>
7#include <linux/moduleparam.h>
8b48463f 8#include <linux/acpi.h>
1c8fce27 9
3f8055c3
RW		 10#include "internal.h"
11
1c8fce27
ZR		 12#define _COMPONENT ACPI_SYSTEM_COMPONENT
13ACPI_MODULE_NAME("sysfs");
14
1c8fce27
ZR		 15#ifdef CONFIG_ACPI_DEBUG
16/*
17 * ACPI debug sysfs I/F, including:
18 * /sys/modules/acpi/parameters/debug_layer
19 * /sys/modules/acpi/parameters/debug_level
20 * /sys/modules/acpi/parameters/trace_method_name
21 * /sys/modules/acpi/parameters/trace_state
22 * /sys/modules/acpi/parameters/trace_debug_layer
23 * /sys/modules/acpi/parameters/trace_debug_level
24 */
25
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),
93d98831 72 ACPI_DEBUG_INIT(ACPI_LV_REPAIR),
7901a052 73 ACPI_DEBUG_INIT(ACPI_LV_TRACE_POINT),
1c8fce27
ZR		 74
75 ACPI_DEBUG_INIT(ACPI_LV_INIT_NAMES),
76 ACPI_DEBUG_INIT(ACPI_LV_PARSE),
77 ACPI_DEBUG_INIT(ACPI_LV_LOAD),
78 ACPI_DEBUG_INIT(ACPI_LV_DISPATCH),
79 ACPI_DEBUG_INIT(ACPI_LV_EXEC),
80 ACPI_DEBUG_INIT(ACPI_LV_NAMES),
81 ACPI_DEBUG_INIT(ACPI_LV_OPREGION),
82 ACPI_DEBUG_INIT(ACPI_LV_BFIELD),
83 ACPI_DEBUG_INIT(ACPI_LV_TABLES),
84 ACPI_DEBUG_INIT(ACPI_LV_VALUES),
85 ACPI_DEBUG_INIT(ACPI_LV_OBJECTS),
86 ACPI_DEBUG_INIT(ACPI_LV_RESOURCES),
87 ACPI_DEBUG_INIT(ACPI_LV_USER_REQUESTS),
88 ACPI_DEBUG_INIT(ACPI_LV_PACKAGE),
89
90 ACPI_DEBUG_INIT(ACPI_LV_ALLOCATIONS),
91 ACPI_DEBUG_INIT(ACPI_LV_FUNCTIONS),
92 ACPI_DEBUG_INIT(ACPI_LV_OPTIMIZATIONS),
93
94 ACPI_DEBUG_INIT(ACPI_LV_MUTEX),
95 ACPI_DEBUG_INIT(ACPI_LV_THREADS),
96 ACPI_DEBUG_INIT(ACPI_LV_IO),
97 ACPI_DEBUG_INIT(ACPI_LV_INTERRUPTS),
98
99 ACPI_DEBUG_INIT(ACPI_LV_AML_DISASSEMBLE),
100 ACPI_DEBUG_INIT(ACPI_LV_VERBOSE_INFO),
101 ACPI_DEBUG_INIT(ACPI_LV_FULL_TABLES),
102 ACPI_DEBUG_INIT(ACPI_LV_EVENTS),
103};
104
ec652b35 105static int param_get_debug_layer(char *buffer, const struct kernel_param *kp)
1c8fce27
ZR		 106{
107 int result = 0;
108 int i;
109
110 result = sprintf(buffer, "%-25s\tHex SET\n", "Description");
111
112 for (i = 0; i < ARRAY_SIZE(acpi_debug_layers); i++) {
113 result += sprintf(buffer + result, "%-25s\t0x%08lX [%c]\n",
114 acpi_debug_layers[i].name,
115 acpi_debug_layers[i].value,
116 (acpi_dbg_layer & acpi_debug_layers[i].value)
117 ? '*' : ' ');
118 }
119 result +=
120 sprintf(buffer + result, "%-25s\t0x%08X [%c]\n", "ACPI_ALL_DRIVERS",
121 ACPI_ALL_DRIVERS,
122 (acpi_dbg_layer & ACPI_ALL_DRIVERS) ==
123 ACPI_ALL_DRIVERS ? '*' : (acpi_dbg_layer & ACPI_ALL_DRIVERS)
124 == 0 ? ' ' : '-');
125 result +=
126 sprintf(buffer + result,
127 "--\ndebug_layer = 0x%08X ( * = enabled)\n",
128 acpi_dbg_layer);
129
130 return result;
131}
132
ec652b35 133static int param_get_debug_level(char *buffer, const struct kernel_param *kp)
1c8fce27
ZR		 134{
135 int result = 0;
136 int i;
137
138 result = sprintf(buffer, "%-25s\tHex SET\n", "Description");
139
140 for (i = 0; i < ARRAY_SIZE(acpi_debug_levels); i++) {
141 result += sprintf(buffer + result, "%-25s\t0x%08lX [%c]\n",
142 acpi_debug_levels[i].name,
143 acpi_debug_levels[i].value,
144 (acpi_dbg_level & acpi_debug_levels[i].value)
145 ? '*' : ' ');
146 }
147 result +=
148 sprintf(buffer + result, "--\ndebug_level = 0x%08X (* = enabled)\n",
149 acpi_dbg_level);
150
151 return result;
152}
153
9c8b04be 154static const struct kernel_param_ops param_ops_debug_layer = {
ec652b35
ZR		 155 .set = param_set_uint,
156 .get = param_get_debug_layer,
157};
158
9c8b04be 159static const struct kernel_param_ops param_ops_debug_level = {
ec652b35
ZR		 160 .set = param_set_uint,
161 .get = param_get_debug_level,
162};
163
164module_param_cb(debug_layer, &param_ops_debug_layer, &acpi_dbg_layer, 0644);
165module_param_cb(debug_level, &param_ops_debug_level, &acpi_dbg_level, 0644);
1c8fce27 166
a0186bcf 167static char trace_method_name[1024];
1c8fce27 168
7901a052 169int param_set_trace_method_name(const char *val, const struct kernel_param *kp)
1c8fce27 170{
7901a052 171 u32 saved_flags = 0;
a0186bcf 172 bool is_abs_path = true;
1c8fce27 173
a0186bcf
LZ		 174 if (*val != '\\')
175 is_abs_path = false;
176
177 if ((is_abs_path && strlen(val) > 1023) ||
178 (!is_abs_path && strlen(val) > 1022)) {
7901a052
LZ		 179 pr_err("%s: string parameter too long\n", kp->name);
180 return -ENOSPC;
1c8fce27
ZR		 181 }
182
7901a052
LZ		 183 /*
184 * It's not safe to update acpi_gbl_trace_method_name without
185 * having the tracer stopped, so we save the original tracer
186 * state and disable it.
187 */
188 saved_flags = acpi_gbl_trace_flags;
189 (void)acpi_debug_trace(NULL,
190 acpi_gbl_trace_dbg_level,
191 acpi_gbl_trace_dbg_layer,
192 0);
193
7901a052 194 /* This is a hack. We can't kmalloc in early boot. */
a0186bcf
LZ		 195 if (is_abs_path)
196 strcpy(trace_method_name, val);
197 else {
198 trace_method_name[0] = '\\';
199 strcpy(trace_method_name+1, val);
200 }
7901a052
LZ		 201
202 /* Restore the original tracer state */
203 (void)acpi_debug_trace(trace_method_name,
204 acpi_gbl_trace_dbg_level,
205 acpi_gbl_trace_dbg_layer,
206 saved_flags);
1c8fce27 207
7901a052
LZ		 208 return 0;
209}
1c8fce27 210
7901a052
LZ		 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, &param_ops_trace_method, &trace_method_name, 0644);
227module_param_cb(trace_debug_layer, &param_ops_trace_attrib, &acpi_gbl_trace_dbg_layer, 0644);
228module_param_cb(trace_debug_level, &param_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;
1c8fce27
ZR		 264}
265
266static int param_get_trace_state(char *buffer, struct kernel_param *kp)
267{
7901a052 268 if (!(acpi_gbl_trace_flags & ACPI_TRACE_ENABLED))
1c8fce27
ZR		 269 return sprintf(buffer, "disable");
270 else {
7901a052
LZ		 271 if (acpi_gbl_trace_method_name) {
272 if (acpi_gbl_trace_flags & ACPI_TRACE_ONESHOT)
273 return sprintf(buffer, "method-once");
274 else
275 return sprintf(buffer, "method");
276 } else
1c8fce27
ZR		 277 return sprintf(buffer, "enable");
278 }
279 return 0;
280}
281
282module_param_call(trace_state, param_set_trace_state, param_get_trace_state,
283 NULL, 0644);
284#endif /* CONFIG_ACPI_DEBUG */
285
aecad432
TR		 286
287/* /sys/modules/acpi/parameters/aml_debug_output */
288
289module_param_named(aml_debug_output, acpi_gbl_enable_aml_debug_object,
481c1381 290 byte, 0644);
aecad432
TR		 291MODULE_PARM_DESC(aml_debug_output,
292 "To enable/disable the ACPI Debug Object output.");
293
1c8fce27
ZR		 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;
3f8055c3 315static struct kobject *hotplug_kobj;
1c8fce27
ZR		 316
317struct acpi_table_attr {
318 struct bin_attribute attr;
319 char name[8];
320 int instance;
321 struct list_head node;
322};
323
324static 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
347static 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
083ca8c4 373 table_attr->attr.size = table_header->length;
1c8fce27
ZR		 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
381static acpi_status
382acpi_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
414static int acpi_tables_sysfs_init(void)
415{
416 struct acpi_table_attr *table_attr;
417 struct acpi_table_header *table_header = NULL;
de03beed
JC		 418 int table_index;
419 acpi_status status;
420 int ret;
1c8fce27
ZR		 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
de03beed
JC		 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;
1c8fce27 449 }
de03beed
JC		 450 list_add_tail(&table_attr->node, &acpi_table_attr_list);
451 }
452
1c8fce27
ZR		 453 kobject_uevent(tables_kobj, KOBJ_ADD);
454 kobject_uevent(dynamic_tables_kobj, KOBJ_ADD);
de03beed 455 status = acpi_install_table_handler(acpi_sysfs_table_handler, NULL);
1c8fce27 456
de03beed 457 return ACPI_FAILURE(status) ? -EINVAL : 0;
1c8fce27
ZR		 458err_dynamic_tables:
459 kobject_put(tables_kobj);
460err:
461 return -ENOMEM;
462}
463
464/*
465 * Detailed ACPI IRQ counters:
466 * /sys/firmware/acpi/interrupts/
467 */
468
469u32 acpi_irq_handled;
470u32 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
478struct event_counter {
479 u32 count;
480 u32 flags;
481};
482
483static struct event_counter *all_counters;
484static u32 num_gpes;
485static u32 num_counters;
486static struct attribute **all_attrs;
487static u32 acpi_gpe_count;
488
489static struct attribute_group interrupt_stats_attr_group = {
490 .name = "interrupts",
491};
492
493static struct kobj_attribute *counter_attrs;
494
495static 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
a0fcdb23 515static void gpe_count(u32 gpe_number)
1c8fce27
ZR		 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
a0fcdb23 531static void fixed_event_count(u32 event_number)
1c8fce27
ZR		 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
644ef74e 545static void acpi_global_event_handler(u32 event_type, acpi_handle device,
a0fcdb23
LM		 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
1c8fce27
ZR		 555static int get_status(u32 index, acpi_event_status *status,
556 acpi_handle *handle)
557{
558 int result = 0;
559
560 if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS)
561 goto end;
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,
c6284237 567 "Invalid GPE 0x%x", index));
1c8fce27
ZR		 568 goto end;
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
574end:
575 return result;
576}
577
578static ssize_t counter_show(struct kobject *kobj,
579 struct kobj_attribute *attr, char *buf)
580{
581 int index = attr - counter_attrs;
582 int size;
583 acpi_handle handle;
584 acpi_event_status status;
585 int result = 0;
586
587 all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI].count =
588 acpi_irq_handled;
589 all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI_NOT].count =
590 acpi_irq_not_handled;
591 all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE].count =
592 acpi_gpe_count;
7b1a1322 593 size = sprintf(buf, "%8u", all_counters[index].count);
1c8fce27
ZR		 594
595 /* "gpe_all" or "sci" */
596 if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS)
597 goto end;
598
599 result = get_status(index, &status, &handle);
600 if (result)
601 goto end;
602
2f857234 603 if (!(status & ACPI_EVENT_FLAG_HAS_HANDLER))
1c8fce27
ZR		 604 size += sprintf(buf + size, " invalid");
605 else if (status & ACPI_EVENT_FLAG_ENABLED)
606 size += sprintf(buf + size, " enabled");
607 else if (status & ACPI_EVENT_FLAG_WAKE_ENABLED)
608 size += sprintf(buf + size, " wake_enabled");
609 else
610 size += sprintf(buf + size, " disabled");
611
612end:
613 size += sprintf(buf + size, "\n");
614 return result ? result : size;
615}
616
617/*
618 * counter_set() sets the specified counter.
619 * setting the total "sci" file to any value clears all counters.
620 * enable/disable/clear a gpe/fixed event in user space.
621 */
622static ssize_t counter_set(struct kobject *kobj,
623 struct kobj_attribute *attr, const char *buf,
624 size_t size)
625{
626 int index = attr - counter_attrs;
627 acpi_event_status status;
628 acpi_handle handle;
629 int result = 0;
c48b1565 630 unsigned long tmp;
1c8fce27
ZR		 631
632 if (index == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI) {
633 int i;
634 for (i = 0; i < num_counters; ++i)
635 all_counters[i].count = 0;
636 acpi_gpe_count = 0;
637 acpi_irq_handled = 0;
638 acpi_irq_not_handled = 0;
639 goto end;
640 }
641
642 /* show the event status for both GPEs and Fixed Events */
643 result = get_status(index, &status, &handle);
644 if (result)
645 goto end;
646
2f857234 647 if (!(status & ACPI_EVENT_FLAG_HAS_HANDLER)) {
1c8fce27
ZR		 648 printk(KERN_WARNING PREFIX
649 "Can not change Invalid GPE/Fixed Event status\n");
650 return -EINVAL;
651 }
652
653 if (index < num_gpes) {
654 if (!strcmp(buf, "disable\n") &&
655 (status & ACPI_EVENT_FLAG_ENABLED))
656 result = acpi_disable_gpe(handle, index);
657 else if (!strcmp(buf, "enable\n") &&
658 !(status & ACPI_EVENT_FLAG_ENABLED))
659 result = acpi_enable_gpe(handle, index);
660 else if (!strcmp(buf, "clear\n") &&
661 (status & ACPI_EVENT_FLAG_SET))
662 result = acpi_clear_gpe(handle, index);
c48b1565
LT		 663 else if (!kstrtoul(buf, 0, &tmp))
664 all_counters[index].count = tmp;
1c8fce27 665 else
c48b1565 666 result = -EINVAL;
1c8fce27
ZR		 667 } else if (index < num_gpes + ACPI_NUM_FIXED_EVENTS) {
668 int event = index - num_gpes;
669 if (!strcmp(buf, "disable\n") &&
670 (status & ACPI_EVENT_FLAG_ENABLED))
671 result = acpi_disable_event(event, ACPI_NOT_ISR);
672 else if (!strcmp(buf, "enable\n") &&
673 !(status & ACPI_EVENT_FLAG_ENABLED))
674 result = acpi_enable_event(event, ACPI_NOT_ISR);
675 else if (!strcmp(buf, "clear\n") &&
676 (status & ACPI_EVENT_FLAG_SET))
677 result = acpi_clear_event(event);
c48b1565
LT		 678 else if (!kstrtoul(buf, 0, &tmp))
679 all_counters[index].count = tmp;
1c8fce27 680 else
c48b1565 681 result = -EINVAL;
1c8fce27
ZR		 682 } else
683 all_counters[index].count = strtoul(buf, NULL, 0);
684
685 if (ACPI_FAILURE(result))
686 result = -EINVAL;
687end:
688 return result ? result : size;
689}
690
691void acpi_irq_stats_init(void)
692{
a0fcdb23 693 acpi_status status;
1c8fce27
ZR		 694 int i;
695
696 if (all_counters)
697 return;
698
699 num_gpes = acpi_current_gpe_count;
700 num_counters = num_gpes + ACPI_NUM_FIXED_EVENTS + NUM_COUNTERS_EXTRA;
701
702 all_attrs = kzalloc(sizeof(struct attribute *) * (num_counters + 1),
703 GFP_KERNEL);
704 if (all_attrs == NULL)
705 return;
706
707 all_counters = kzalloc(sizeof(struct event_counter) * (num_counters),
708 GFP_KERNEL);
709 if (all_counters == NULL)
710 goto fail;
711
644ef74e 712 status = acpi_install_global_event_handler(acpi_global_event_handler, NULL);
a0fcdb23
LM		 713 if (ACPI_FAILURE(status))
714 goto fail;
715
1c8fce27
ZR		 716 counter_attrs = kzalloc(sizeof(struct kobj_attribute) * (num_counters),
717 GFP_KERNEL);
718 if (counter_attrs == NULL)
719 goto fail;
720
721 for (i = 0; i < num_counters; ++i) {
722 char buffer[12];
723 char *name;
724
725 if (i < num_gpes)
726 sprintf(buffer, "gpe%02X", i);
727 else if (i == num_gpes + ACPI_EVENT_PMTIMER)
728 sprintf(buffer, "ff_pmtimer");
729 else if (i == num_gpes + ACPI_EVENT_GLOBAL)
730 sprintf(buffer, "ff_gbl_lock");
731 else if (i == num_gpes + ACPI_EVENT_POWER_BUTTON)
732 sprintf(buffer, "ff_pwr_btn");
733 else if (i == num_gpes + ACPI_EVENT_SLEEP_BUTTON)
734 sprintf(buffer, "ff_slp_btn");
735 else if (i == num_gpes + ACPI_EVENT_RTC)
736 sprintf(buffer, "ff_rt_clk");
737 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE)
738 sprintf(buffer, "gpe_all");
739 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI)
740 sprintf(buffer, "sci");
741 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI_NOT)
742 sprintf(buffer, "sci_not");
743 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR)
744 sprintf(buffer, "error");
745 else
746 sprintf(buffer, "bug%02X", i);
747
096a8aac 748 name = kstrdup(buffer, GFP_KERNEL);
1c8fce27
ZR		 749 if (name == NULL)
750 goto fail;
1c8fce27
ZR		 751
752 sysfs_attr_init(&counter_attrs[i].attr);
753 counter_attrs[i].attr.name = name;
754 counter_attrs[i].attr.mode = 0644;
755 counter_attrs[i].show = counter_show;
756 counter_attrs[i].store = counter_set;
757
758 all_attrs[i] = &counter_attrs[i].attr;
759 }
760
761 interrupt_stats_attr_group.attrs = all_attrs;
762 if (!sysfs_create_group(acpi_kobj, &interrupt_stats_attr_group))
763 return;
764
765fail:
766 delete_gpe_attr_array();
767 return;
768}
769
770static void __exit interrupt_stats_exit(void)
771{
772 sysfs_remove_group(acpi_kobj, &interrupt_stats_attr_group);
773
774 delete_gpe_attr_array();
775
776 return;
777}
778
362b6460
TR		 779static ssize_t
780acpi_show_profile(struct device *dev, struct device_attribute *attr,
781 char *buf)
782{
783 return sprintf(buf, "%d\n", acpi_gbl_FADT.preferred_profile);
784}
785
786static const struct device_attribute pm_profile_attr =
787 __ATTR(pm_profile, S_IRUGO, acpi_show_profile, NULL);
788
3f8055c3
RW		 789static ssize_t hotplug_enabled_show(struct kobject *kobj,
790 struct kobj_attribute *attr, char *buf)
791{
792 struct acpi_hotplug_profile *hotplug = to_acpi_hotplug_profile(kobj);
793
794 return sprintf(buf, "%d\n", hotplug->enabled);
795}
796
797static ssize_t hotplug_enabled_store(struct kobject *kobj,
798 struct kobj_attribute *attr,
799 const char *buf, size_t size)
800{
801 struct acpi_hotplug_profile *hotplug = to_acpi_hotplug_profile(kobj);
802 unsigned int val;
803
804 if (kstrtouint(buf, 10, &val) || val > 1)
805 return -EINVAL;
806
807 acpi_scan_hotplug_enabled(hotplug, val);
808 return size;
809}
810
811static struct kobj_attribute hotplug_enabled_attr =
812 __ATTR(enabled, S_IRUGO | S_IWUSR, hotplug_enabled_show,
813 hotplug_enabled_store);
814
815static struct attribute *hotplug_profile_attrs[] = {
816 &hotplug_enabled_attr.attr,
817 NULL
818};
819
b09753ec 820static struct kobj_type acpi_hotplug_profile_ktype = {
3f8055c3
RW		 821 .sysfs_ops = &kobj_sysfs_ops,
822 .default_attrs = hotplug_profile_attrs,
823};
824
825void acpi_sysfs_add_hotplug_profile(struct acpi_hotplug_profile *hotplug,
826 const char *name)
827{
828 int error;
829
830 if (!hotplug_kobj)
831 goto err_out;
832
acd3e2c9
BH		 833 error = kobject_init_and_add(&hotplug->kobj,
834 &acpi_hotplug_profile_ktype, hotplug_kobj, "%s", name);
3f8055c3
RW		 835 if (error)
836 goto err_out;
837
838 kobject_uevent(&hotplug->kobj, KOBJ_ADD);
839 return;
840
841 err_out:
842 pr_err(PREFIX "Unable to add hotplug profile '%s'\n", name);
843}
844
683058e3
RW		 845static ssize_t force_remove_show(struct kobject *kobj,
846 struct kobj_attribute *attr, char *buf)
847{
848 return sprintf(buf, "%d\n", !!acpi_force_hot_remove);
849}
850
851static ssize_t force_remove_store(struct kobject *kobj,
852 struct kobj_attribute *attr,
853 const char *buf, size_t size)
854{
855 bool val;
856 int ret;
857
858 ret = strtobool(buf, &val);
859 if (ret < 0)
860 return ret;
861
862 lock_device_hotplug();
863 acpi_force_hot_remove = val;
864 unlock_device_hotplug();
865 return size;
866}
867
868static const struct kobj_attribute force_remove_attr =
869 __ATTR(force_remove, S_IRUGO | S_IWUSR, force_remove_show,
870 force_remove_store);
871
1c8fce27
ZR		 872int __init acpi_sysfs_init(void)
873{
874 int result;
875
876 result = acpi_tables_sysfs_init();
362b6460
TR		 877 if (result)
878 return result;
3f8055c3
RW		 879
880 hotplug_kobj = kobject_create_and_add("hotplug", acpi_kobj);
bc1e49df
IY		 881 if (!hotplug_kobj)
882 return -ENOMEM;
883
683058e3
RW		 884 result = sysfs_create_file(hotplug_kobj, &force_remove_attr.attr);
885 if (result)
886 return result;
887
362b6460 888 result = sysfs_create_file(acpi_kobj, &pm_profile_attr.attr);
1c8fce27
ZR		 889 return result;
890}
Linux 6.x block layer and io_uring tree(s)