2 * sysfs.c - ACPI sysfs interface to userspace.
5 #include <linux/init.h>
6 #include <linux/kernel.h>
7 #include <linux/moduleparam.h>
8 #include <acpi/acpi_drivers.h>
10 #define _COMPONENT ACPI_SYSTEM_COMPONENT
11 ACPI_MODULE_NAME("sysfs");
13 #define PREFIX "ACPI: "
15 #ifdef CONFIG_ACPI_DEBUG
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
34 #define ACPI_DEBUG_INIT(v) { .name = #v, .value = v }
36 static const struct acpi_dlayer acpi_debug_layers[] = {
37 ACPI_DEBUG_INIT(ACPI_UTILITIES),
38 ACPI_DEBUG_INIT(ACPI_HARDWARE),
39 ACPI_DEBUG_INIT(ACPI_EVENTS),
40 ACPI_DEBUG_INIT(ACPI_TABLES),
41 ACPI_DEBUG_INIT(ACPI_NAMESPACE),
42 ACPI_DEBUG_INIT(ACPI_PARSER),
43 ACPI_DEBUG_INIT(ACPI_DISPATCHER),
44 ACPI_DEBUG_INIT(ACPI_EXECUTER),
45 ACPI_DEBUG_INIT(ACPI_RESOURCES),
46 ACPI_DEBUG_INIT(ACPI_CA_DEBUGGER),
47 ACPI_DEBUG_INIT(ACPI_OS_SERVICES),
48 ACPI_DEBUG_INIT(ACPI_CA_DISASSEMBLER),
49 ACPI_DEBUG_INIT(ACPI_COMPILER),
50 ACPI_DEBUG_INIT(ACPI_TOOLS),
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),
68 static const struct acpi_dlevel acpi_debug_levels[] = {
69 ACPI_DEBUG_INIT(ACPI_LV_INIT),
70 ACPI_DEBUG_INIT(ACPI_LV_DEBUG_OBJECT),
71 ACPI_DEBUG_INIT(ACPI_LV_INFO),
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),
88 ACPI_DEBUG_INIT(ACPI_LV_ALLOCATIONS),
89 ACPI_DEBUG_INIT(ACPI_LV_FUNCTIONS),
90 ACPI_DEBUG_INIT(ACPI_LV_OPTIMIZATIONS),
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),
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),
103 static int param_get_debug_layer(char *buffer, const struct kernel_param *kp)
108 result = sprintf(buffer, "%-25s\tHex SET\n", "Description");
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)
118 sprintf(buffer + result, "%-25s\t0x%08X [%c]\n", "ACPI_ALL_DRIVERS",
120 (acpi_dbg_layer & ACPI_ALL_DRIVERS) ==
121 ACPI_ALL_DRIVERS ? '*' : (acpi_dbg_layer & ACPI_ALL_DRIVERS)
124 sprintf(buffer + result,
125 "--\ndebug_layer = 0x%08X ( * = enabled)\n",
131 static int param_get_debug_level(char *buffer, const struct kernel_param *kp)
136 result = sprintf(buffer, "%-25s\tHex SET\n", "Description");
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)
146 sprintf(buffer + result, "--\ndebug_level = 0x%08X (* = enabled)\n",
152 static const struct kernel_param_ops param_ops_debug_layer = {
153 .set = param_set_uint,
154 .get = param_get_debug_layer,
157 static const struct kernel_param_ops param_ops_debug_level = {
158 .set = param_set_uint,
159 .get = param_get_debug_level,
162 module_param_cb(debug_layer, ¶m_ops_debug_layer, &acpi_dbg_layer, 0644);
163 module_param_cb(debug_level, ¶m_ops_debug_level, &acpi_dbg_level, 0644);
165 static char trace_method_name[6];
166 module_param_string(trace_method_name, trace_method_name, 6, 0644);
167 static unsigned int trace_debug_layer;
168 module_param(trace_debug_layer, uint, 0644);
169 static unsigned int trace_debug_level;
170 module_param(trace_debug_level, uint, 0644);
172 static int param_set_trace_state(const char *val, struct kernel_param *kp)
176 if (!strncmp(val, "enable", strlen("enable"))) {
177 result = acpi_debug_trace(trace_method_name, trace_debug_level,
178 trace_debug_layer, 0);
184 if (!strncmp(val, "disable", strlen("disable"))) {
186 result = acpi_debug_trace((char *)&name, trace_debug_level,
187 trace_debug_layer, 0);
193 if (!strncmp(val, "1", 1)) {
194 result = acpi_debug_trace(trace_method_name, trace_debug_level,
195 trace_debug_layer, 1);
206 static int param_get_trace_state(char *buffer, struct kernel_param *kp)
208 if (!acpi_gbl_trace_method_name)
209 return sprintf(buffer, "disable");
211 if (acpi_gbl_trace_flags & 1)
212 return sprintf(buffer, "1");
214 return sprintf(buffer, "enable");
219 module_param_call(trace_state, param_set_trace_state, param_get_trace_state,
221 #endif /* CONFIG_ACPI_DEBUG */
224 /* /sys/modules/acpi/parameters/aml_debug_output */
226 module_param_named(aml_debug_output, acpi_gbl_enable_aml_debug_object,
228 MODULE_PARM_DESC(aml_debug_output,
229 "To enable/disable the ACPI Debug Object output.");
231 /* /sys/module/acpi/parameters/acpica_version */
232 static int param_get_acpica_version(char *buffer, struct kernel_param *kp)
236 result = sprintf(buffer, "%x", ACPI_CA_VERSION);
241 module_param_call(acpica_version, NULL, param_get_acpica_version, NULL, 0444);
244 * ACPI table sysfs I/F:
245 * /sys/firmware/acpi/tables/
246 * /sys/firmware/acpi/tables/dynamic/
249 static LIST_HEAD(acpi_table_attr_list);
250 static struct kobject *tables_kobj;
251 static struct kobject *dynamic_tables_kobj;
253 struct acpi_table_attr {
254 struct bin_attribute attr;
257 struct list_head node;
260 static 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)
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;
268 char name[ACPI_NAME_SIZE];
270 if (strncmp(table_attr->name, "NULL", 4))
271 memcpy(name, table_attr->name, ACPI_NAME_SIZE);
273 memcpy(name, "\0\0\0\0", 4);
275 status = acpi_get_table(name, table_attr->instance, &table_header);
276 if (ACPI_FAILURE(status))
279 return memory_read_from_buffer(buf, count, &offset,
280 table_header, table_header->length);
283 static void acpi_table_attr_init(struct acpi_table_attr *table_attr,
284 struct acpi_table_header *table_header)
286 struct acpi_table_header *header = NULL;
287 struct acpi_table_attr *attr = NULL;
289 sysfs_attr_init(&table_attr->attr.attr);
290 if (table_header->signature[0] != '\0')
291 memcpy(table_attr->name, table_header->signature,
294 memcpy(table_attr->name, "NULL", 4);
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;
301 table_attr->instance++;
303 if (table_attr->instance > 1 || (table_attr->instance == 1 &&
305 (table_header->signature, 2, &header)))
306 sprintf(table_attr->name + ACPI_NAME_SIZE, "%d",
307 table_attr->instance);
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;
318 acpi_sysfs_table_handler(u32 event, void *table, void *context)
320 struct acpi_table_attr *table_attr;
323 case ACPI_TABLE_EVENT_LOAD:
325 kzalloc(sizeof(struct acpi_table_attr), GFP_KERNEL);
329 acpi_table_attr_init(table_attr, table);
330 if (sysfs_create_bin_file(dynamic_tables_kobj,
331 &table_attr->attr)) {
335 list_add_tail(&table_attr->node, &acpi_table_attr_list);
337 case ACPI_TABLE_EVENT_UNLOAD:
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.
345 return AE_BAD_PARAMETER;
350 static int acpi_tables_sysfs_init(void)
352 struct acpi_table_attr *table_attr;
353 struct acpi_table_header *table_header = NULL;
357 tables_kobj = kobject_create_and_add("tables", acpi_kobj);
361 dynamic_tables_kobj = kobject_create_and_add("dynamic", tables_kobj);
362 if (!dynamic_tables_kobj)
363 goto err_dynamic_tables;
366 result = acpi_get_table_by_index(table_index, &table_header);
371 kzalloc(sizeof(struct acpi_table_attr), GFP_KERNEL);
375 acpi_table_attr_init(table_attr, table_header);
377 sysfs_create_bin_file(tables_kobj,
383 list_add_tail(&table_attr->node,
384 &acpi_table_attr_list);
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);
391 return result == AE_OK ? 0 : -EINVAL;
393 kobject_put(tables_kobj);
399 * Detailed ACPI IRQ counters:
400 * /sys/firmware/acpi/interrupts/
403 u32 acpi_irq_handled;
404 u32 acpi_irq_not_handled;
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
412 struct event_counter {
417 static struct event_counter *all_counters;
419 static u32 num_counters;
420 static struct attribute **all_attrs;
421 static u32 acpi_gpe_count;
423 static struct attribute_group interrupt_stats_attr_group = {
424 .name = "interrupts",
427 static struct kobj_attribute *counter_attrs;
429 static void delete_gpe_attr_array(void)
431 struct event_counter *tmp = all_counters;
439 for (i = 0; i < num_gpes; i++)
440 kfree(counter_attrs[i].attr.name);
442 kfree(counter_attrs);
449 static void gpe_count(u32 gpe_number)
456 if (gpe_number < num_gpes)
457 all_counters[gpe_number].count++;
459 all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS +
460 COUNT_ERROR].count++;
465 static void fixed_event_count(u32 event_number)
470 if (event_number < ACPI_NUM_FIXED_EVENTS)
471 all_counters[num_gpes + event_number].count++;
473 all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS +
474 COUNT_ERROR].count++;
479 static void acpi_gbl_event_handler(u32 event_type, acpi_handle device,
480 u32 event_number, void *context)
482 if (event_type == ACPI_EVENT_TYPE_GPE)
483 gpe_count(event_number);
485 if (event_type == ACPI_EVENT_TYPE_FIXED)
486 fixed_event_count(event_number);
489 static int get_status(u32 index, acpi_event_status *status,
494 if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS)
497 if (index < num_gpes) {
498 result = acpi_get_gpe_device(index, handle);
500 ACPI_EXCEPTION((AE_INFO, AE_NOT_FOUND,
501 "Invalid GPE 0x%x\n", index));
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);
511 static ssize_t counter_show(struct kobject *kobj,
512 struct kobj_attribute *attr, char *buf)
514 int index = attr - counter_attrs;
517 acpi_event_status status;
520 all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI].count =
522 all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI_NOT].count =
523 acpi_irq_not_handled;
524 all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE].count =
526 size = sprintf(buf, "%8d", all_counters[index].count);
528 /* "gpe_all" or "sci" */
529 if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS)
532 result = get_status(index, &status, &handle);
536 if (!(status & ACPI_EVENT_FLAG_HANDLE))
537 size += sprintf(buf + size, " invalid");
538 else if (status & ACPI_EVENT_FLAG_ENABLED)
539 size += sprintf(buf + size, " enabled");
540 else if (status & ACPI_EVENT_FLAG_WAKE_ENABLED)
541 size += sprintf(buf + size, " wake_enabled");
543 size += sprintf(buf + size, " disabled");
546 size += sprintf(buf + size, "\n");
547 return result ? result : size;
551 * counter_set() sets the specified counter.
552 * setting the total "sci" file to any value clears all counters.
553 * enable/disable/clear a gpe/fixed event in user space.
555 static ssize_t counter_set(struct kobject *kobj,
556 struct kobj_attribute *attr, const char *buf,
559 int index = attr - counter_attrs;
560 acpi_event_status status;
564 if (index == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI) {
566 for (i = 0; i < num_counters; ++i)
567 all_counters[i].count = 0;
569 acpi_irq_handled = 0;
570 acpi_irq_not_handled = 0;
574 /* show the event status for both GPEs and Fixed Events */
575 result = get_status(index, &status, &handle);
579 if (!(status & ACPI_EVENT_FLAG_HANDLE)) {
580 printk(KERN_WARNING PREFIX
581 "Can not change Invalid GPE/Fixed Event status\n");
585 if (index < num_gpes) {
586 if (!strcmp(buf, "disable\n") &&
587 (status & ACPI_EVENT_FLAG_ENABLED))
588 result = acpi_disable_gpe(handle, index);
589 else if (!strcmp(buf, "enable\n") &&
590 !(status & ACPI_EVENT_FLAG_ENABLED))
591 result = acpi_enable_gpe(handle, index);
592 else if (!strcmp(buf, "clear\n") &&
593 (status & ACPI_EVENT_FLAG_SET))
594 result = acpi_clear_gpe(handle, index);
596 all_counters[index].count = strtoul(buf, NULL, 0);
597 } else if (index < num_gpes + ACPI_NUM_FIXED_EVENTS) {
598 int event = index - num_gpes;
599 if (!strcmp(buf, "disable\n") &&
600 (status & ACPI_EVENT_FLAG_ENABLED))
601 result = acpi_disable_event(event, ACPI_NOT_ISR);
602 else if (!strcmp(buf, "enable\n") &&
603 !(status & ACPI_EVENT_FLAG_ENABLED))
604 result = acpi_enable_event(event, ACPI_NOT_ISR);
605 else if (!strcmp(buf, "clear\n") &&
606 (status & ACPI_EVENT_FLAG_SET))
607 result = acpi_clear_event(event);
609 all_counters[index].count = strtoul(buf, NULL, 0);
611 all_counters[index].count = strtoul(buf, NULL, 0);
613 if (ACPI_FAILURE(result))
616 return result ? result : size;
619 void acpi_irq_stats_init(void)
627 num_gpes = acpi_current_gpe_count;
628 num_counters = num_gpes + ACPI_NUM_FIXED_EVENTS + NUM_COUNTERS_EXTRA;
630 all_attrs = kzalloc(sizeof(struct attribute *) * (num_counters + 1),
632 if (all_attrs == NULL)
635 all_counters = kzalloc(sizeof(struct event_counter) * (num_counters),
637 if (all_counters == NULL)
640 status = acpi_install_global_event_handler(acpi_gbl_event_handler, NULL);
641 if (ACPI_FAILURE(status))
644 counter_attrs = kzalloc(sizeof(struct kobj_attribute) * (num_counters),
646 if (counter_attrs == NULL)
649 for (i = 0; i < num_counters; ++i) {
654 sprintf(buffer, "gpe%02X", i);
655 else if (i == num_gpes + ACPI_EVENT_PMTIMER)
656 sprintf(buffer, "ff_pmtimer");
657 else if (i == num_gpes + ACPI_EVENT_GLOBAL)
658 sprintf(buffer, "ff_gbl_lock");
659 else if (i == num_gpes + ACPI_EVENT_POWER_BUTTON)
660 sprintf(buffer, "ff_pwr_btn");
661 else if (i == num_gpes + ACPI_EVENT_SLEEP_BUTTON)
662 sprintf(buffer, "ff_slp_btn");
663 else if (i == num_gpes + ACPI_EVENT_RTC)
664 sprintf(buffer, "ff_rt_clk");
665 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE)
666 sprintf(buffer, "gpe_all");
667 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI)
668 sprintf(buffer, "sci");
669 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI_NOT)
670 sprintf(buffer, "sci_not");
671 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR)
672 sprintf(buffer, "error");
674 sprintf(buffer, "bug%02X", i);
676 name = kzalloc(strlen(buffer) + 1, GFP_KERNEL);
679 strncpy(name, buffer, strlen(buffer) + 1);
681 sysfs_attr_init(&counter_attrs[i].attr);
682 counter_attrs[i].attr.name = name;
683 counter_attrs[i].attr.mode = 0644;
684 counter_attrs[i].show = counter_show;
685 counter_attrs[i].store = counter_set;
687 all_attrs[i] = &counter_attrs[i].attr;
690 interrupt_stats_attr_group.attrs = all_attrs;
691 if (!sysfs_create_group(acpi_kobj, &interrupt_stats_attr_group))
695 delete_gpe_attr_array();
699 static void __exit interrupt_stats_exit(void)
701 sysfs_remove_group(acpi_kobj, &interrupt_stats_attr_group);
703 delete_gpe_attr_array();
709 acpi_show_profile(struct device *dev, struct device_attribute *attr,
712 return sprintf(buf, "%d\n", acpi_gbl_FADT.preferred_profile);
715 static const struct device_attribute pm_profile_attr =
716 __ATTR(pm_profile, S_IRUGO, acpi_show_profile, NULL);
718 int __init acpi_sysfs_init(void)
722 result = acpi_tables_sysfs_init();
725 result = sysfs_create_file(acpi_kobj, &pm_profile_attr.attr);