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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * sysfs.c - ACPI sysfs interface to userspace.
4 */
5
6#define pr_fmt(fmt) "ACPI: " fmt
7
8#include <linux/init.h>
9#include <linux/kernel.h>
10#include <linux/moduleparam.h>
11#include <linux/acpi.h>
12
13#include "internal.h"
14
15#define _COMPONENT ACPI_SYSTEM_COMPONENT
16ACPI_MODULE_NAME("sysfs");
17
18#ifdef CONFIG_ACPI_DEBUG
19/*
20 * ACPI debug sysfs I/F, including:
21 * /sys/modules/acpi/parameters/debug_layer
22 * /sys/modules/acpi/parameters/debug_level
23 * /sys/modules/acpi/parameters/trace_method_name
24 * /sys/modules/acpi/parameters/trace_state
25 * /sys/modules/acpi/parameters/trace_debug_layer
26 * /sys/modules/acpi/parameters/trace_debug_level
27 */
28
29struct acpi_dlayer {
30 const char *name;
31 unsigned long value;
32};
33struct acpi_dlevel {
34 const char *name;
35 unsigned long value;
36};
37#define ACPI_DEBUG_INIT(v) { .name = #v, .value = v }
38
39static const struct acpi_dlayer acpi_debug_layers[] = {
40 ACPI_DEBUG_INIT(ACPI_UTILITIES),
41 ACPI_DEBUG_INIT(ACPI_HARDWARE),
42 ACPI_DEBUG_INIT(ACPI_EVENTS),
43 ACPI_DEBUG_INIT(ACPI_TABLES),
44 ACPI_DEBUG_INIT(ACPI_NAMESPACE),
45 ACPI_DEBUG_INIT(ACPI_PARSER),
46 ACPI_DEBUG_INIT(ACPI_DISPATCHER),
47 ACPI_DEBUG_INIT(ACPI_EXECUTER),
48 ACPI_DEBUG_INIT(ACPI_RESOURCES),
49 ACPI_DEBUG_INIT(ACPI_CA_DEBUGGER),
50 ACPI_DEBUG_INIT(ACPI_OS_SERVICES),
51 ACPI_DEBUG_INIT(ACPI_CA_DISASSEMBLER),
52 ACPI_DEBUG_INIT(ACPI_COMPILER),
53 ACPI_DEBUG_INIT(ACPI_TOOLS),
54
55 ACPI_DEBUG_INIT(ACPI_BUS_COMPONENT),
56 ACPI_DEBUG_INIT(ACPI_AC_COMPONENT),
57 ACPI_DEBUG_INIT(ACPI_BATTERY_COMPONENT),
58 ACPI_DEBUG_INIT(ACPI_BUTTON_COMPONENT),
59 ACPI_DEBUG_INIT(ACPI_SBS_COMPONENT),
60 ACPI_DEBUG_INIT(ACPI_FAN_COMPONENT),
61 ACPI_DEBUG_INIT(ACPI_PCI_COMPONENT),
62 ACPI_DEBUG_INIT(ACPI_POWER_COMPONENT),
63 ACPI_DEBUG_INIT(ACPI_CONTAINER_COMPONENT),
64 ACPI_DEBUG_INIT(ACPI_SYSTEM_COMPONENT),
65 ACPI_DEBUG_INIT(ACPI_THERMAL_COMPONENT),
66 ACPI_DEBUG_INIT(ACPI_MEMORY_DEVICE_COMPONENT),
67 ACPI_DEBUG_INIT(ACPI_VIDEO_COMPONENT),
68 ACPI_DEBUG_INIT(ACPI_PROCESSOR_COMPONENT),
69};
70
71static const struct acpi_dlevel acpi_debug_levels[] = {
72 ACPI_DEBUG_INIT(ACPI_LV_INIT),
73 ACPI_DEBUG_INIT(ACPI_LV_DEBUG_OBJECT),
74 ACPI_DEBUG_INIT(ACPI_LV_INFO),
75 ACPI_DEBUG_INIT(ACPI_LV_REPAIR),
76 ACPI_DEBUG_INIT(ACPI_LV_TRACE_POINT),
77
78 ACPI_DEBUG_INIT(ACPI_LV_INIT_NAMES),
79 ACPI_DEBUG_INIT(ACPI_LV_PARSE),
80 ACPI_DEBUG_INIT(ACPI_LV_LOAD),
81 ACPI_DEBUG_INIT(ACPI_LV_DISPATCH),
82 ACPI_DEBUG_INIT(ACPI_LV_EXEC),
83 ACPI_DEBUG_INIT(ACPI_LV_NAMES),
84 ACPI_DEBUG_INIT(ACPI_LV_OPREGION),
85 ACPI_DEBUG_INIT(ACPI_LV_BFIELD),
86 ACPI_DEBUG_INIT(ACPI_LV_TABLES),
87 ACPI_DEBUG_INIT(ACPI_LV_VALUES),
88 ACPI_DEBUG_INIT(ACPI_LV_OBJECTS),
89 ACPI_DEBUG_INIT(ACPI_LV_RESOURCES),
90 ACPI_DEBUG_INIT(ACPI_LV_USER_REQUESTS),
91 ACPI_DEBUG_INIT(ACPI_LV_PACKAGE),
92
93 ACPI_DEBUG_INIT(ACPI_LV_ALLOCATIONS),
94 ACPI_DEBUG_INIT(ACPI_LV_FUNCTIONS),
95 ACPI_DEBUG_INIT(ACPI_LV_OPTIMIZATIONS),
96
97 ACPI_DEBUG_INIT(ACPI_LV_MUTEX),
98 ACPI_DEBUG_INIT(ACPI_LV_THREADS),
99 ACPI_DEBUG_INIT(ACPI_LV_IO),
100 ACPI_DEBUG_INIT(ACPI_LV_INTERRUPTS),
101
102 ACPI_DEBUG_INIT(ACPI_LV_AML_DISASSEMBLE),
103 ACPI_DEBUG_INIT(ACPI_LV_VERBOSE_INFO),
104 ACPI_DEBUG_INIT(ACPI_LV_FULL_TABLES),
105 ACPI_DEBUG_INIT(ACPI_LV_EVENTS),
106};
107
108static int param_get_debug_layer(char *buffer, const struct kernel_param *kp)
109{
110 int result = 0;
111 int i;
112
113 result = sprintf(buffer, "%-25s\tHex SET\n", "Description");
114
115 for (i = 0; i < ARRAY_SIZE(acpi_debug_layers); i++) {
116 result += sprintf(buffer + result, "%-25s\t0x%08lX [%c]\n",
117 acpi_debug_layers[i].name,
118 acpi_debug_layers[i].value,
119 (acpi_dbg_layer & acpi_debug_layers[i].value)
120 ? '*' : ' ');
121 }
122 result +=
123 sprintf(buffer + result, "%-25s\t0x%08X [%c]\n", "ACPI_ALL_DRIVERS",
124 ACPI_ALL_DRIVERS,
125 (acpi_dbg_layer & ACPI_ALL_DRIVERS) ==
126 ACPI_ALL_DRIVERS ? '*' : (acpi_dbg_layer & ACPI_ALL_DRIVERS)
127 == 0 ? ' ' : '-');
128 result +=
129 sprintf(buffer + result,
130 "--\ndebug_layer = 0x%08X ( * = enabled)\n",
131 acpi_dbg_layer);
132
133 return result;
134}
135
136static int param_get_debug_level(char *buffer, const struct kernel_param *kp)
137{
138 int result = 0;
139 int i;
140
141 result = sprintf(buffer, "%-25s\tHex SET\n", "Description");
142
143 for (i = 0; i < ARRAY_SIZE(acpi_debug_levels); i++) {
144 result += sprintf(buffer + result, "%-25s\t0x%08lX [%c]\n",
145 acpi_debug_levels[i].name,
146 acpi_debug_levels[i].value,
147 (acpi_dbg_level & acpi_debug_levels[i].value)
148 ? '*' : ' ');
149 }
150 result +=
151 sprintf(buffer + result, "--\ndebug_level = 0x%08X (* = enabled)\n",
152 acpi_dbg_level);
153
154 return result;
155}
156
157static const struct kernel_param_ops param_ops_debug_layer = {
158 .set = param_set_uint,
159 .get = param_get_debug_layer,
160};
161
162static const struct kernel_param_ops param_ops_debug_level = {
163 .set = param_set_uint,
164 .get = param_get_debug_level,
165};
166
167module_param_cb(debug_layer, ¶m_ops_debug_layer, &acpi_dbg_layer, 0644);
168module_param_cb(debug_level, ¶m_ops_debug_level, &acpi_dbg_level, 0644);
169
170static char trace_method_name[1024];
171
172static int param_set_trace_method_name(const char *val,
173 const struct kernel_param *kp)
174{
175 u32 saved_flags = 0;
176 bool is_abs_path = true;
177
178 if (*val != '\\')
179 is_abs_path = false;
180
181 if ((is_abs_path && strlen(val) > 1023) ||
182 (!is_abs_path && strlen(val) > 1022)) {
183 pr_err("%s: string parameter too long\n", kp->name);
184 return -ENOSPC;
185 }
186
187 /*
188 * It's not safe to update acpi_gbl_trace_method_name without
189 * having the tracer stopped, so we save the original tracer
190 * state and disable it.
191 */
192 saved_flags = acpi_gbl_trace_flags;
193 (void)acpi_debug_trace(NULL,
194 acpi_gbl_trace_dbg_level,
195 acpi_gbl_trace_dbg_layer,
196 0);
197
198 /* This is a hack. We can't kmalloc in early boot. */
199 if (is_abs_path)
200 strcpy(trace_method_name, val);
201 else {
202 trace_method_name[0] = '\\';
203 strcpy(trace_method_name+1, val);
204 }
205
206 /* Restore the original tracer state */
207 (void)acpi_debug_trace(trace_method_name,
208 acpi_gbl_trace_dbg_level,
209 acpi_gbl_trace_dbg_layer,
210 saved_flags);
211
212 return 0;
213}
214
215static int param_get_trace_method_name(char *buffer, const struct kernel_param *kp)
216{
217 return scnprintf(buffer, PAGE_SIZE, "%s", acpi_gbl_trace_method_name);
218}
219
220static const struct kernel_param_ops param_ops_trace_method = {
221 .set = param_set_trace_method_name,
222 .get = param_get_trace_method_name,
223};
224
225static const struct kernel_param_ops param_ops_trace_attrib = {
226 .set = param_set_uint,
227 .get = param_get_uint,
228};
229
230module_param_cb(trace_method_name, ¶m_ops_trace_method, &trace_method_name, 0644);
231module_param_cb(trace_debug_layer, ¶m_ops_trace_attrib, &acpi_gbl_trace_dbg_layer, 0644);
232module_param_cb(trace_debug_level, ¶m_ops_trace_attrib, &acpi_gbl_trace_dbg_level, 0644);
233
234static int param_set_trace_state(const char *val,
235 const struct kernel_param *kp)
236{
237 acpi_status status;
238 const char *method = trace_method_name;
239 u32 flags = 0;
240
241/* So "xxx-once" comparison should go prior than "xxx" comparison */
242#define acpi_compare_param(val, key) \
243 strncmp((val), (key), sizeof(key) - 1)
244
245 if (!acpi_compare_param(val, "enable")) {
246 method = NULL;
247 flags = ACPI_TRACE_ENABLED;
248 } else if (!acpi_compare_param(val, "disable"))
249 method = NULL;
250 else if (!acpi_compare_param(val, "method-once"))
251 flags = ACPI_TRACE_ENABLED | ACPI_TRACE_ONESHOT;
252 else if (!acpi_compare_param(val, "method"))
253 flags = ACPI_TRACE_ENABLED;
254 else if (!acpi_compare_param(val, "opcode-once"))
255 flags = ACPI_TRACE_ENABLED | ACPI_TRACE_ONESHOT | ACPI_TRACE_OPCODE;
256 else if (!acpi_compare_param(val, "opcode"))
257 flags = ACPI_TRACE_ENABLED | ACPI_TRACE_OPCODE;
258 else
259 return -EINVAL;
260
261 status = acpi_debug_trace(method,
262 acpi_gbl_trace_dbg_level,
263 acpi_gbl_trace_dbg_layer,
264 flags);
265 if (ACPI_FAILURE(status))
266 return -EBUSY;
267
268 return 0;
269}
270
271static int param_get_trace_state(char *buffer, const struct kernel_param *kp)
272{
273 if (!(acpi_gbl_trace_flags & ACPI_TRACE_ENABLED))
274 return sprintf(buffer, "disable");
275 else {
276 if (acpi_gbl_trace_method_name) {
277 if (acpi_gbl_trace_flags & ACPI_TRACE_ONESHOT)
278 return sprintf(buffer, "method-once");
279 else
280 return sprintf(buffer, "method");
281 } else
282 return sprintf(buffer, "enable");
283 }
284 return 0;
285}
286
287module_param_call(trace_state, param_set_trace_state, param_get_trace_state,
288 NULL, 0644);
289#endif /* CONFIG_ACPI_DEBUG */
290
291
292/* /sys/modules/acpi/parameters/aml_debug_output */
293
294module_param_named(aml_debug_output, acpi_gbl_enable_aml_debug_object,
295 byte, 0644);
296MODULE_PARM_DESC(aml_debug_output,
297 "To enable/disable the ACPI Debug Object output.");
298
299/* /sys/module/acpi/parameters/acpica_version */
300static int param_get_acpica_version(char *buffer,
301 const struct kernel_param *kp)
302{
303 int result;
304
305 result = sprintf(buffer, "%x", ACPI_CA_VERSION);
306
307 return result;
308}
309
310module_param_call(acpica_version, NULL, param_get_acpica_version, NULL, 0444);
311
312/*
313 * ACPI table sysfs I/F:
314 * /sys/firmware/acpi/tables/
315 * /sys/firmware/acpi/tables/data/
316 * /sys/firmware/acpi/tables/dynamic/
317 */
318
319static LIST_HEAD(acpi_table_attr_list);
320static struct kobject *tables_kobj;
321static struct kobject *tables_data_kobj;
322static struct kobject *dynamic_tables_kobj;
323static struct kobject *hotplug_kobj;
324
325#define ACPI_MAX_TABLE_INSTANCES 999
326#define ACPI_INST_SIZE 4 /* including trailing 0 */
327
328struct acpi_table_attr {
329 struct bin_attribute attr;
330 char name[ACPI_NAMESEG_SIZE];
331 int instance;
332 char filename[ACPI_NAMESEG_SIZE+ACPI_INST_SIZE];
333 struct list_head node;
334};
335
336struct acpi_data_attr {
337 struct bin_attribute attr;
338 u64 addr;
339};
340
341static ssize_t acpi_table_show(struct file *filp, struct kobject *kobj,
342 struct bin_attribute *bin_attr, char *buf,
343 loff_t offset, size_t count)
344{
345 struct acpi_table_attr *table_attr =
346 container_of(bin_attr, struct acpi_table_attr, attr);
347 struct acpi_table_header *table_header = NULL;
348 acpi_status status;
349 ssize_t rc;
350
351 status = acpi_get_table(table_attr->name, table_attr->instance,
352 &table_header);
353 if (ACPI_FAILURE(status))
354 return -ENODEV;
355
356 rc = memory_read_from_buffer(buf, count, &offset, table_header,
357 table_header->length);
358 acpi_put_table(table_header);
359 return rc;
360}
361
362static int acpi_table_attr_init(struct kobject *tables_obj,
363 struct acpi_table_attr *table_attr,
364 struct acpi_table_header *table_header)
365{
366 struct acpi_table_header *header = NULL;
367 struct acpi_table_attr *attr = NULL;
368 char instance_str[ACPI_INST_SIZE];
369
370 sysfs_attr_init(&table_attr->attr.attr);
371 ACPI_COPY_NAMESEG(table_attr->name, table_header->signature);
372
373 list_for_each_entry(attr, &acpi_table_attr_list, node) {
374 if (ACPI_COMPARE_NAMESEG(table_attr->name, attr->name))
375 if (table_attr->instance < attr->instance)
376 table_attr->instance = attr->instance;
377 }
378 table_attr->instance++;
379 if (table_attr->instance > ACPI_MAX_TABLE_INSTANCES) {
380 pr_warn("%4.4s: too many table instances\n",
381 table_attr->name);
382 return -ERANGE;
383 }
384
385 ACPI_COPY_NAMESEG(table_attr->filename, table_header->signature);
386 table_attr->filename[ACPI_NAMESEG_SIZE] = '\0';
387 if (table_attr->instance > 1 || (table_attr->instance == 1 &&
388 !acpi_get_table
389 (table_header->signature, 2, &header))) {
390 snprintf(instance_str, sizeof(instance_str), "%u",
391 table_attr->instance);
392 strcat(table_attr->filename, instance_str);
393 }
394
395 table_attr->attr.size = table_header->length;
396 table_attr->attr.read = acpi_table_show;
397 table_attr->attr.attr.name = table_attr->filename;
398 table_attr->attr.attr.mode = 0400;
399
400 return sysfs_create_bin_file(tables_obj, &table_attr->attr);
401}
402
403acpi_status acpi_sysfs_table_handler(u32 event, void *table, void *context)
404{
405 struct acpi_table_attr *table_attr;
406
407 switch (event) {
408 case ACPI_TABLE_EVENT_INSTALL:
409 table_attr =
410 kzalloc(sizeof(struct acpi_table_attr), GFP_KERNEL);
411 if (!table_attr)
412 return AE_NO_MEMORY;
413
414 if (acpi_table_attr_init(dynamic_tables_kobj,
415 table_attr, table)) {
416 kfree(table_attr);
417 return AE_ERROR;
418 }
419 list_add_tail(&table_attr->node, &acpi_table_attr_list);
420 break;
421 case ACPI_TABLE_EVENT_LOAD:
422 case ACPI_TABLE_EVENT_UNLOAD:
423 case ACPI_TABLE_EVENT_UNINSTALL:
424 /*
425 * we do not need to do anything right now
426 * because the table is not deleted from the
427 * global table list when unloading it.
428 */
429 break;
430 default:
431 return AE_BAD_PARAMETER;
432 }
433 return AE_OK;
434}
435
436static ssize_t acpi_data_show(struct file *filp, struct kobject *kobj,
437 struct bin_attribute *bin_attr, char *buf,
438 loff_t offset, size_t count)
439{
440 struct acpi_data_attr *data_attr;
441 void __iomem *base;
442 ssize_t rc;
443
444 data_attr = container_of(bin_attr, struct acpi_data_attr, attr);
445
446 base = acpi_os_map_memory(data_attr->addr, data_attr->attr.size);
447 if (!base)
448 return -ENOMEM;
449 rc = memory_read_from_buffer(buf, count, &offset, base,
450 data_attr->attr.size);
451 acpi_os_unmap_memory(base, data_attr->attr.size);
452
453 return rc;
454}
455
456static int acpi_bert_data_init(void *th, struct acpi_data_attr *data_attr)
457{
458 struct acpi_table_bert *bert = th;
459
460 if (bert->header.length < sizeof(struct acpi_table_bert) ||
461 bert->region_length < sizeof(struct acpi_hest_generic_status)) {
462 kfree(data_attr);
463 return -EINVAL;
464 }
465 data_attr->addr = bert->address;
466 data_attr->attr.size = bert->region_length;
467 data_attr->attr.attr.name = "BERT";
468
469 return sysfs_create_bin_file(tables_data_kobj, &data_attr->attr);
470}
471
472static struct acpi_data_obj {
473 char *name;
474 int (*fn)(void *, struct acpi_data_attr *);
475} acpi_data_objs[] = {
476 { ACPI_SIG_BERT, acpi_bert_data_init },
477};
478
479#define NUM_ACPI_DATA_OBJS ARRAY_SIZE(acpi_data_objs)
480
481static int acpi_table_data_init(struct acpi_table_header *th)
482{
483 struct acpi_data_attr *data_attr;
484 int i;
485
486 for (i = 0; i < NUM_ACPI_DATA_OBJS; i++) {
487 if (ACPI_COMPARE_NAMESEG(th->signature, acpi_data_objs[i].name)) {
488 data_attr = kzalloc(sizeof(*data_attr), GFP_KERNEL);
489 if (!data_attr)
490 return -ENOMEM;
491 sysfs_attr_init(&data_attr->attr.attr);
492 data_attr->attr.read = acpi_data_show;
493 data_attr->attr.attr.mode = 0400;
494 return acpi_data_objs[i].fn(th, data_attr);
495 }
496 }
497 return 0;
498}
499
500static int acpi_tables_sysfs_init(void)
501{
502 struct acpi_table_attr *table_attr;
503 struct acpi_table_header *table_header = NULL;
504 int table_index;
505 acpi_status status;
506 int ret;
507
508 tables_kobj = kobject_create_and_add("tables", acpi_kobj);
509 if (!tables_kobj)
510 goto err;
511
512 tables_data_kobj = kobject_create_and_add("data", tables_kobj);
513 if (!tables_data_kobj)
514 goto err_tables_data;
515
516 dynamic_tables_kobj = kobject_create_and_add("dynamic", tables_kobj);
517 if (!dynamic_tables_kobj)
518 goto err_dynamic_tables;
519
520 for (table_index = 0;; table_index++) {
521 status = acpi_get_table_by_index(table_index, &table_header);
522
523 if (status == AE_BAD_PARAMETER)
524 break;
525
526 if (ACPI_FAILURE(status))
527 continue;
528
529 table_attr = kzalloc(sizeof(*table_attr), GFP_KERNEL);
530 if (!table_attr)
531 return -ENOMEM;
532
533 ret = acpi_table_attr_init(tables_kobj,
534 table_attr, table_header);
535 if (ret) {
536 kfree(table_attr);
537 return ret;
538 }
539 list_add_tail(&table_attr->node, &acpi_table_attr_list);
540 acpi_table_data_init(table_header);
541 }
542
543 kobject_uevent(tables_kobj, KOBJ_ADD);
544 kobject_uevent(tables_data_kobj, KOBJ_ADD);
545 kobject_uevent(dynamic_tables_kobj, KOBJ_ADD);
546
547 return 0;
548err_dynamic_tables:
549 kobject_put(tables_data_kobj);
550err_tables_data:
551 kobject_put(tables_kobj);
552err:
553 return -ENOMEM;
554}
555
556/*
557 * Detailed ACPI IRQ counters:
558 * /sys/firmware/acpi/interrupts/
559 */
560
561u32 acpi_irq_handled;
562u32 acpi_irq_not_handled;
563
564#define COUNT_GPE 0
565#define COUNT_SCI 1 /* acpi_irq_handled */
566#define COUNT_SCI_NOT 2 /* acpi_irq_not_handled */
567#define COUNT_ERROR 3 /* other */
568#define NUM_COUNTERS_EXTRA 4
569
570struct event_counter {
571 u32 count;
572 u32 flags;
573};
574
575static struct event_counter *all_counters;
576static u32 num_gpes;
577static u32 num_counters;
578static struct attribute **all_attrs;
579static u32 acpi_gpe_count;
580
581static struct attribute_group interrupt_stats_attr_group = {
582 .name = "interrupts",
583};
584
585static struct kobj_attribute *counter_attrs;
586
587static void delete_gpe_attr_array(void)
588{
589 struct event_counter *tmp = all_counters;
590
591 all_counters = NULL;
592 kfree(tmp);
593
594 if (counter_attrs) {
595 int i;
596
597 for (i = 0; i < num_gpes; i++)
598 kfree(counter_attrs[i].attr.name);
599
600 kfree(counter_attrs);
601 }
602 kfree(all_attrs);
603
604 return;
605}
606
607static void gpe_count(u32 gpe_number)
608{
609 acpi_gpe_count++;
610
611 if (!all_counters)
612 return;
613
614 if (gpe_number < num_gpes)
615 all_counters[gpe_number].count++;
616 else
617 all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS +
618 COUNT_ERROR].count++;
619
620 return;
621}
622
623static void fixed_event_count(u32 event_number)
624{
625 if (!all_counters)
626 return;
627
628 if (event_number < ACPI_NUM_FIXED_EVENTS)
629 all_counters[num_gpes + event_number].count++;
630 else
631 all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS +
632 COUNT_ERROR].count++;
633
634 return;
635}
636
637static void acpi_global_event_handler(u32 event_type, acpi_handle device,
638 u32 event_number, void *context)
639{
640 if (event_type == ACPI_EVENT_TYPE_GPE) {
641 gpe_count(event_number);
642 pr_debug("GPE event 0x%02x\n", event_number);
643 } else if (event_type == ACPI_EVENT_TYPE_FIXED) {
644 fixed_event_count(event_number);
645 pr_debug("Fixed event 0x%02x\n", event_number);
646 } else {
647 pr_debug("Other event 0x%02x\n", event_number);
648 }
649}
650
651static int get_status(u32 index, acpi_event_status *ret,
652 acpi_handle *handle)
653{
654 acpi_status status;
655
656 if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS)
657 return -EINVAL;
658
659 if (index < num_gpes) {
660 status = acpi_get_gpe_device(index, handle);
661 if (ACPI_FAILURE(status)) {
662 ACPI_EXCEPTION((AE_INFO, AE_NOT_FOUND,
663 "Invalid GPE 0x%x", index));
664 return -ENXIO;
665 }
666 status = acpi_get_gpe_status(*handle, index, ret);
667 } else {
668 status = acpi_get_event_status(index - num_gpes, ret);
669 }
670 if (ACPI_FAILURE(status))
671 return -EIO;
672
673 return 0;
674}
675
676static ssize_t counter_show(struct kobject *kobj,
677 struct kobj_attribute *attr, char *buf)
678{
679 int index = attr - counter_attrs;
680 int size;
681 acpi_handle handle;
682 acpi_event_status status;
683 int result = 0;
684
685 all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI].count =
686 acpi_irq_handled;
687 all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI_NOT].count =
688 acpi_irq_not_handled;
689 all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE].count =
690 acpi_gpe_count;
691 size = sprintf(buf, "%8u", all_counters[index].count);
692
693 /* "gpe_all" or "sci" */
694 if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS)
695 goto end;
696
697 result = get_status(index, &status, &handle);
698 if (result)
699 goto end;
700
701 if (status & ACPI_EVENT_FLAG_ENABLE_SET)
702 size += sprintf(buf + size, " EN");
703 else
704 size += sprintf(buf + size, " ");
705 if (status & ACPI_EVENT_FLAG_STATUS_SET)
706 size += sprintf(buf + size, " STS");
707 else
708 size += sprintf(buf + size, " ");
709
710 if (!(status & ACPI_EVENT_FLAG_HAS_HANDLER))
711 size += sprintf(buf + size, " invalid ");
712 else if (status & ACPI_EVENT_FLAG_ENABLED)
713 size += sprintf(buf + size, " enabled ");
714 else if (status & ACPI_EVENT_FLAG_WAKE_ENABLED)
715 size += sprintf(buf + size, " wake_enabled");
716 else
717 size += sprintf(buf + size, " disabled ");
718 if (status & ACPI_EVENT_FLAG_MASKED)
719 size += sprintf(buf + size, " masked ");
720 else
721 size += sprintf(buf + size, " unmasked");
722
723end:
724 size += sprintf(buf + size, "\n");
725 return result ? result : size;
726}
727
728/*
729 * counter_set() sets the specified counter.
730 * setting the total "sci" file to any value clears all counters.
731 * enable/disable/clear a gpe/fixed event in user space.
732 */
733static ssize_t counter_set(struct kobject *kobj,
734 struct kobj_attribute *attr, const char *buf,
735 size_t size)
736{
737 int index = attr - counter_attrs;
738 acpi_event_status status;
739 acpi_handle handle;
740 int result = 0;
741 unsigned long tmp;
742
743 if (index == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI) {
744 int i;
745 for (i = 0; i < num_counters; ++i)
746 all_counters[i].count = 0;
747 acpi_gpe_count = 0;
748 acpi_irq_handled = 0;
749 acpi_irq_not_handled = 0;
750 goto end;
751 }
752
753 /* show the event status for both GPEs and Fixed Events */
754 result = get_status(index, &status, &handle);
755 if (result)
756 goto end;
757
758 if (!(status & ACPI_EVENT_FLAG_HAS_HANDLER)) {
759 printk(KERN_WARNING PREFIX
760 "Can not change Invalid GPE/Fixed Event status\n");
761 return -EINVAL;
762 }
763
764 if (index < num_gpes) {
765 if (!strcmp(buf, "disable\n") &&
766 (status & ACPI_EVENT_FLAG_ENABLED))
767 result = acpi_disable_gpe(handle, index);
768 else if (!strcmp(buf, "enable\n") &&
769 !(status & ACPI_EVENT_FLAG_ENABLED))
770 result = acpi_enable_gpe(handle, index);
771 else if (!strcmp(buf, "clear\n") &&
772 (status & ACPI_EVENT_FLAG_STATUS_SET))
773 result = acpi_clear_gpe(handle, index);
774 else if (!strcmp(buf, "mask\n"))
775 result = acpi_mask_gpe(handle, index, TRUE);
776 else if (!strcmp(buf, "unmask\n"))
777 result = acpi_mask_gpe(handle, index, FALSE);
778 else if (!kstrtoul(buf, 0, &tmp))
779 all_counters[index].count = tmp;
780 else
781 result = -EINVAL;
782 } else if (index < num_gpes + ACPI_NUM_FIXED_EVENTS) {
783 int event = index - num_gpes;
784 if (!strcmp(buf, "disable\n") &&
785 (status & ACPI_EVENT_FLAG_ENABLE_SET))
786 result = acpi_disable_event(event, ACPI_NOT_ISR);
787 else if (!strcmp(buf, "enable\n") &&
788 !(status & ACPI_EVENT_FLAG_ENABLE_SET))
789 result = acpi_enable_event(event, ACPI_NOT_ISR);
790 else if (!strcmp(buf, "clear\n") &&
791 (status & ACPI_EVENT_FLAG_STATUS_SET))
792 result = acpi_clear_event(event);
793 else if (!kstrtoul(buf, 0, &tmp))
794 all_counters[index].count = tmp;
795 else
796 result = -EINVAL;
797 } else
798 all_counters[index].count = strtoul(buf, NULL, 0);
799
800 if (ACPI_FAILURE(result))
801 result = -EINVAL;
802end:
803 return result ? result : size;
804}
805
806/*
807 * A Quirk Mechanism for GPE Flooding Prevention:
808 *
809 * Quirks may be needed to prevent GPE flooding on a specific GPE. The
810 * flooding typically cannot be detected and automatically prevented by
811 * ACPI_GPE_DISPATCH_NONE check because there is a _Lxx/_Exx prepared in
812 * the AML tables. This normally indicates a feature gap in Linux, thus
813 * instead of providing endless quirk tables, we provide a boot parameter
814 * for those who want this quirk. For example, if the users want to prevent
815 * the GPE flooding for GPE 00, they need to specify the following boot
816 * parameter:
817 * acpi_mask_gpe=0x00
818 * The masking status can be modified by the following runtime controlling
819 * interface:
820 * echo unmask > /sys/firmware/acpi/interrupts/gpe00
821 */
822#define ACPI_MASKABLE_GPE_MAX 0xFF
823static DECLARE_BITMAP(acpi_masked_gpes_map, ACPI_MASKABLE_GPE_MAX) __initdata;
824
825static int __init acpi_gpe_set_masked_gpes(char *val)
826{
827 u8 gpe;
828
829 if (kstrtou8(val, 0, &gpe) || gpe > ACPI_MASKABLE_GPE_MAX)
830 return -EINVAL;
831 set_bit(gpe, acpi_masked_gpes_map);
832
833 return 1;
834}
835__setup("acpi_mask_gpe=", acpi_gpe_set_masked_gpes);
836
837void __init acpi_gpe_apply_masked_gpes(void)
838{
839 acpi_handle handle;
840 acpi_status status;
841 u8 gpe;
842
843 for_each_set_bit(gpe, acpi_masked_gpes_map, ACPI_MASKABLE_GPE_MAX) {
844 status = acpi_get_gpe_device(gpe, &handle);
845 if (ACPI_SUCCESS(status)) {
846 pr_info("Masking GPE 0x%x.\n", gpe);
847 (void)acpi_mask_gpe(handle, gpe, TRUE);
848 }
849 }
850}
851
852void acpi_irq_stats_init(void)
853{
854 acpi_status status;
855 int i;
856
857 if (all_counters)
858 return;
859
860 num_gpes = acpi_current_gpe_count;
861 num_counters = num_gpes + ACPI_NUM_FIXED_EVENTS + NUM_COUNTERS_EXTRA;
862
863 all_attrs = kcalloc(num_counters + 1, sizeof(struct attribute *),
864 GFP_KERNEL);
865 if (all_attrs == NULL)
866 return;
867
868 all_counters = kcalloc(num_counters, sizeof(struct event_counter),
869 GFP_KERNEL);
870 if (all_counters == NULL)
871 goto fail;
872
873 status = acpi_install_global_event_handler(acpi_global_event_handler, NULL);
874 if (ACPI_FAILURE(status))
875 goto fail;
876
877 counter_attrs = kcalloc(num_counters, sizeof(struct kobj_attribute),
878 GFP_KERNEL);
879 if (counter_attrs == NULL)
880 goto fail;
881
882 for (i = 0; i < num_counters; ++i) {
883 char buffer[12];
884 char *name;
885
886 if (i < num_gpes)
887 sprintf(buffer, "gpe%02X", i);
888 else if (i == num_gpes + ACPI_EVENT_PMTIMER)
889 sprintf(buffer, "ff_pmtimer");
890 else if (i == num_gpes + ACPI_EVENT_GLOBAL)
891 sprintf(buffer, "ff_gbl_lock");
892 else if (i == num_gpes + ACPI_EVENT_POWER_BUTTON)
893 sprintf(buffer, "ff_pwr_btn");
894 else if (i == num_gpes + ACPI_EVENT_SLEEP_BUTTON)
895 sprintf(buffer, "ff_slp_btn");
896 else if (i == num_gpes + ACPI_EVENT_RTC)
897 sprintf(buffer, "ff_rt_clk");
898 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE)
899 sprintf(buffer, "gpe_all");
900 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI)
901 sprintf(buffer, "sci");
902 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI_NOT)
903 sprintf(buffer, "sci_not");
904 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR)
905 sprintf(buffer, "error");
906 else
907 sprintf(buffer, "bug%02X", i);
908
909 name = kstrdup(buffer, GFP_KERNEL);
910 if (name == NULL)
911 goto fail;
912
913 sysfs_attr_init(&counter_attrs[i].attr);
914 counter_attrs[i].attr.name = name;
915 counter_attrs[i].attr.mode = 0644;
916 counter_attrs[i].show = counter_show;
917 counter_attrs[i].store = counter_set;
918
919 all_attrs[i] = &counter_attrs[i].attr;
920 }
921
922 interrupt_stats_attr_group.attrs = all_attrs;
923 if (!sysfs_create_group(acpi_kobj, &interrupt_stats_attr_group))
924 return;
925
926fail:
927 delete_gpe_attr_array();
928 return;
929}
930
931static void __exit interrupt_stats_exit(void)
932{
933 sysfs_remove_group(acpi_kobj, &interrupt_stats_attr_group);
934
935 delete_gpe_attr_array();
936
937 return;
938}
939
940static ssize_t
941acpi_show_profile(struct device *dev, struct device_attribute *attr,
942 char *buf)
943{
944 return sprintf(buf, "%d\n", acpi_gbl_FADT.preferred_profile);
945}
946
947static const struct device_attribute pm_profile_attr =
948 __ATTR(pm_profile, S_IRUGO, acpi_show_profile, NULL);
949
950static ssize_t hotplug_enabled_show(struct kobject *kobj,
951 struct kobj_attribute *attr, char *buf)
952{
953 struct acpi_hotplug_profile *hotplug = to_acpi_hotplug_profile(kobj);
954
955 return sprintf(buf, "%d\n", hotplug->enabled);
956}
957
958static ssize_t hotplug_enabled_store(struct kobject *kobj,
959 struct kobj_attribute *attr,
960 const char *buf, size_t size)
961{
962 struct acpi_hotplug_profile *hotplug = to_acpi_hotplug_profile(kobj);
963 unsigned int val;
964
965 if (kstrtouint(buf, 10, &val) || val > 1)
966 return -EINVAL;
967
968 acpi_scan_hotplug_enabled(hotplug, val);
969 return size;
970}
971
972static struct kobj_attribute hotplug_enabled_attr =
973 __ATTR(enabled, S_IRUGO | S_IWUSR, hotplug_enabled_show,
974 hotplug_enabled_store);
975
976static struct attribute *hotplug_profile_attrs[] = {
977 &hotplug_enabled_attr.attr,
978 NULL
979};
980
981static struct kobj_type acpi_hotplug_profile_ktype = {
982 .sysfs_ops = &kobj_sysfs_ops,
983 .default_attrs = hotplug_profile_attrs,
984};
985
986void acpi_sysfs_add_hotplug_profile(struct acpi_hotplug_profile *hotplug,
987 const char *name)
988{
989 int error;
990
991 if (!hotplug_kobj)
992 goto err_out;
993
994 error = kobject_init_and_add(&hotplug->kobj,
995 &acpi_hotplug_profile_ktype, hotplug_kobj, "%s", name);
996 if (error)
997 goto err_out;
998
999 kobject_uevent(&hotplug->kobj, KOBJ_ADD);
1000 return;
1001
1002 err_out:
1003 pr_err(PREFIX "Unable to add hotplug profile '%s'\n", name);
1004}
1005
1006static ssize_t force_remove_show(struct kobject *kobj,
1007 struct kobj_attribute *attr, char *buf)
1008{
1009 return sprintf(buf, "%d\n", 0);
1010}
1011
1012static ssize_t force_remove_store(struct kobject *kobj,
1013 struct kobj_attribute *attr,
1014 const char *buf, size_t size)
1015{
1016 bool val;
1017 int ret;
1018
1019 ret = strtobool(buf, &val);
1020 if (ret < 0)
1021 return ret;
1022
1023 if (val) {
1024 pr_err("Enabling force_remove is not supported anymore. Please report to linux-acpi@vger.kernel.org if you depend on this functionality\n");
1025 return -EINVAL;
1026 }
1027 return size;
1028}
1029
1030static const struct kobj_attribute force_remove_attr =
1031 __ATTR(force_remove, S_IRUGO | S_IWUSR, force_remove_show,
1032 force_remove_store);
1033
1034int __init acpi_sysfs_init(void)
1035{
1036 int result;
1037
1038 result = acpi_tables_sysfs_init();
1039 if (result)
1040 return result;
1041
1042 hotplug_kobj = kobject_create_and_add("hotplug", acpi_kobj);
1043 if (!hotplug_kobj)
1044 return -ENOMEM;
1045
1046 result = sysfs_create_file(hotplug_kobj, &force_remove_attr.attr);
1047 if (result)
1048 return result;
1049
1050 result = sysfs_create_file(acpi_kobj, &pm_profile_attr.attr);
1051 return result;
1052}
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}