1/*
2 * sysfs.c - ACPI sysfs interface to userspace.
3 */
4
5#include <linux/init.h>
6#include <linux/kernel.h>
7#include <linux/moduleparam.h>
8#include <acpi/acpi_drivers.h>
9
10#define _COMPONENT		ACPI_SYSTEM_COMPONENT
11ACPI_MODULE_NAME("sysfs");
12
13#define PREFIX "ACPI: "
14
15#ifdef CONFIG_ACPI_DEBUG
16/*
17 * ACPI debug sysfs I/F, including:
18 * /sys/modules/acpi/parameters/debug_layer
19 * /sys/modules/acpi/parameters/debug_level
20 * /sys/modules/acpi/parameters/trace_method_name
21 * /sys/modules/acpi/parameters/trace_state
22 * /sys/modules/acpi/parameters/trace_debug_layer
23 * /sys/modules/acpi/parameters/trace_debug_level
24 */
25
26struct acpi_dlayer {
27	const char *name;
28	unsigned long value;
29};
30struct acpi_dlevel {
31	const char *name;
32	unsigned long value;
33};
34#define ACPI_DEBUG_INIT(v)	{ .name = #v, .value = v }
35
36static const struct acpi_dlayer acpi_debug_layers[] = {
37	ACPI_DEBUG_INIT(ACPI_UTILITIES),
38	ACPI_DEBUG_INIT(ACPI_HARDWARE),
39	ACPI_DEBUG_INIT(ACPI_EVENTS),
40	ACPI_DEBUG_INIT(ACPI_TABLES),
41	ACPI_DEBUG_INIT(ACPI_NAMESPACE),
42	ACPI_DEBUG_INIT(ACPI_PARSER),
43	ACPI_DEBUG_INIT(ACPI_DISPATCHER),
44	ACPI_DEBUG_INIT(ACPI_EXECUTER),
45	ACPI_DEBUG_INIT(ACPI_RESOURCES),
46	ACPI_DEBUG_INIT(ACPI_CA_DEBUGGER),
47	ACPI_DEBUG_INIT(ACPI_OS_SERVICES),
48	ACPI_DEBUG_INIT(ACPI_CA_DISASSEMBLER),
49	ACPI_DEBUG_INIT(ACPI_COMPILER),
50	ACPI_DEBUG_INIT(ACPI_TOOLS),
51
52	ACPI_DEBUG_INIT(ACPI_BUS_COMPONENT),
53	ACPI_DEBUG_INIT(ACPI_AC_COMPONENT),
54	ACPI_DEBUG_INIT(ACPI_BATTERY_COMPONENT),
55	ACPI_DEBUG_INIT(ACPI_BUTTON_COMPONENT),
56	ACPI_DEBUG_INIT(ACPI_SBS_COMPONENT),
57	ACPI_DEBUG_INIT(ACPI_FAN_COMPONENT),
58	ACPI_DEBUG_INIT(ACPI_PCI_COMPONENT),
59	ACPI_DEBUG_INIT(ACPI_POWER_COMPONENT),
60	ACPI_DEBUG_INIT(ACPI_CONTAINER_COMPONENT),
61	ACPI_DEBUG_INIT(ACPI_SYSTEM_COMPONENT),
62	ACPI_DEBUG_INIT(ACPI_THERMAL_COMPONENT),
63	ACPI_DEBUG_INIT(ACPI_MEMORY_DEVICE_COMPONENT),
64	ACPI_DEBUG_INIT(ACPI_VIDEO_COMPONENT),
65	ACPI_DEBUG_INIT(ACPI_PROCESSOR_COMPONENT),
66};
67
68static const struct acpi_dlevel acpi_debug_levels[] = {
69	ACPI_DEBUG_INIT(ACPI_LV_INIT),
70	ACPI_DEBUG_INIT(ACPI_LV_DEBUG_OBJECT),
71	ACPI_DEBUG_INIT(ACPI_LV_INFO),
72
73	ACPI_DEBUG_INIT(ACPI_LV_INIT_NAMES),
74	ACPI_DEBUG_INIT(ACPI_LV_PARSE),
75	ACPI_DEBUG_INIT(ACPI_LV_LOAD),
76	ACPI_DEBUG_INIT(ACPI_LV_DISPATCH),
77	ACPI_DEBUG_INIT(ACPI_LV_EXEC),
78	ACPI_DEBUG_INIT(ACPI_LV_NAMES),
79	ACPI_DEBUG_INIT(ACPI_LV_OPREGION),
80	ACPI_DEBUG_INIT(ACPI_LV_BFIELD),
81	ACPI_DEBUG_INIT(ACPI_LV_TABLES),
82	ACPI_DEBUG_INIT(ACPI_LV_VALUES),
83	ACPI_DEBUG_INIT(ACPI_LV_OBJECTS),
84	ACPI_DEBUG_INIT(ACPI_LV_RESOURCES),
85	ACPI_DEBUG_INIT(ACPI_LV_USER_REQUESTS),
86	ACPI_DEBUG_INIT(ACPI_LV_PACKAGE),
87
88	ACPI_DEBUG_INIT(ACPI_LV_ALLOCATIONS),
89	ACPI_DEBUG_INIT(ACPI_LV_FUNCTIONS),
90	ACPI_DEBUG_INIT(ACPI_LV_OPTIMIZATIONS),
91
92	ACPI_DEBUG_INIT(ACPI_LV_MUTEX),
93	ACPI_DEBUG_INIT(ACPI_LV_THREADS),
94	ACPI_DEBUG_INIT(ACPI_LV_IO),
95	ACPI_DEBUG_INIT(ACPI_LV_INTERRUPTS),
96
97	ACPI_DEBUG_INIT(ACPI_LV_AML_DISASSEMBLE),
98	ACPI_DEBUG_INIT(ACPI_LV_VERBOSE_INFO),
99	ACPI_DEBUG_INIT(ACPI_LV_FULL_TABLES),
100	ACPI_DEBUG_INIT(ACPI_LV_EVENTS),
101};
102
103static int param_get_debug_layer(char *buffer, const struct kernel_param *kp)
104{
105	int result = 0;
106	int i;
107
108	result = sprintf(buffer, "%-25s\tHex        SET\n", "Description");
109
110	for (i = 0; i < ARRAY_SIZE(acpi_debug_layers); i++) {
111		result += sprintf(buffer + result, "%-25s\t0x%08lX [%c]\n",
112				  acpi_debug_layers[i].name,
113				  acpi_debug_layers[i].value,
114				  (acpi_dbg_layer & acpi_debug_layers[i].value)
115				  ? '*' : ' ');
116	}
117	result +=
118	    sprintf(buffer + result, "%-25s\t0x%08X [%c]\n", "ACPI_ALL_DRIVERS",
119		    ACPI_ALL_DRIVERS,
120		    (acpi_dbg_layer & ACPI_ALL_DRIVERS) ==
121		    ACPI_ALL_DRIVERS ? '*' : (acpi_dbg_layer & ACPI_ALL_DRIVERS)
122		    == 0 ? ' ' : '-');
123	result +=
124	    sprintf(buffer + result,
125		    "--\ndebug_layer = 0x%08X ( * = enabled)\n",
126		    acpi_dbg_layer);
127
128	return result;
129}
130
131static int param_get_debug_level(char *buffer, const struct kernel_param *kp)
132{
133	int result = 0;
134	int i;
135
136	result = sprintf(buffer, "%-25s\tHex        SET\n", "Description");
137
138	for (i = 0; i < ARRAY_SIZE(acpi_debug_levels); i++) {
139		result += sprintf(buffer + result, "%-25s\t0x%08lX [%c]\n",
140				  acpi_debug_levels[i].name,
141				  acpi_debug_levels[i].value,
142				  (acpi_dbg_level & acpi_debug_levels[i].value)
143				  ? '*' : ' ');
144	}
145	result +=
146	    sprintf(buffer + result, "--\ndebug_level = 0x%08X (* = enabled)\n",
147		    acpi_dbg_level);
148
149	return result;
150}
151
152static const struct kernel_param_ops param_ops_debug_layer = {
153	.set = param_set_uint,
154	.get = param_get_debug_layer,
155};
156
157static const struct kernel_param_ops param_ops_debug_level = {
158	.set = param_set_uint,
159	.get = param_get_debug_level,
160};
161
162module_param_cb(debug_layer, &param_ops_debug_layer, &acpi_dbg_layer, 0644);
163module_param_cb(debug_level, &param_ops_debug_level, &acpi_dbg_level, 0644);
164
165static char trace_method_name[6];
166module_param_string(trace_method_name, trace_method_name, 6, 0644);
167static unsigned int trace_debug_layer;
168module_param(trace_debug_layer, uint, 0644);
169static unsigned int trace_debug_level;
170module_param(trace_debug_level, uint, 0644);
171
172static int param_set_trace_state(const char *val, struct kernel_param *kp)
173{
174	int result = 0;
175
176	if (!strncmp(val, "enable", strlen("enable"))) {
177		result = acpi_debug_trace(trace_method_name, trace_debug_level,
178					  trace_debug_layer, 0);
179		if (result)
180			result = -EBUSY;
181		goto exit;
182	}
183
184	if (!strncmp(val, "disable", strlen("disable"))) {
185		int name = 0;
186		result = acpi_debug_trace((char *)&name, trace_debug_level,
187					  trace_debug_layer, 0);
188		if (result)
189			result = -EBUSY;
190		goto exit;
191	}
192
193	if (!strncmp(val, "1", 1)) {
194		result = acpi_debug_trace(trace_method_name, trace_debug_level,
195					  trace_debug_layer, 1);
196		if (result)
197			result = -EBUSY;
198		goto exit;
199	}
200
201	result = -EINVAL;
202exit:
203	return result;
204}
205
206static int param_get_trace_state(char *buffer, struct kernel_param *kp)
207{
208	if (!acpi_gbl_trace_method_name)
209		return sprintf(buffer, "disable");
210	else {
211		if (acpi_gbl_trace_flags & 1)
212			return sprintf(buffer, "1");
213		else
214			return sprintf(buffer, "enable");
215	}
216	return 0;
217}
218
219module_param_call(trace_state, param_set_trace_state, param_get_trace_state,
220		  NULL, 0644);
221#endif /* CONFIG_ACPI_DEBUG */
222
223
224/* /sys/modules/acpi/parameters/aml_debug_output */
225
226module_param_named(aml_debug_output, acpi_gbl_enable_aml_debug_object,
227		   bool, 0644);
228MODULE_PARM_DESC(aml_debug_output,
229		 "To enable/disable the ACPI Debug Object output.");
230
231/* /sys/module/acpi/parameters/acpica_version */
232static int param_get_acpica_version(char *buffer, struct kernel_param *kp)
233{
234	int result;
235
236	result = sprintf(buffer, "%x", ACPI_CA_VERSION);
237
238	return result;
239}
240
241module_param_call(acpica_version, NULL, param_get_acpica_version, NULL, 0444);
242
243/*
244 * ACPI table sysfs I/F:
245 * /sys/firmware/acpi/tables/
246 * /sys/firmware/acpi/tables/dynamic/
247 */
248
249static LIST_HEAD(acpi_table_attr_list);
250static struct kobject *tables_kobj;
251static struct kobject *dynamic_tables_kobj;
252
253struct acpi_table_attr {
254	struct bin_attribute attr;
255	char name[8];
256	int instance;
257	struct list_head node;
258};
259
260static ssize_t acpi_table_show(struct file *filp, struct kobject *kobj,
261			       struct bin_attribute *bin_attr, char *buf,
262			       loff_t offset, size_t count)
263{
264	struct acpi_table_attr *table_attr =
265	    container_of(bin_attr, struct acpi_table_attr, attr);
266	struct acpi_table_header *table_header = NULL;
267	acpi_status status;
268	char name[ACPI_NAME_SIZE];
269
270	if (strncmp(table_attr->name, "NULL", 4))
271		memcpy(name, table_attr->name, ACPI_NAME_SIZE);
272	else
273		memcpy(name, "\0\0\0\0", 4);
274
275	status = acpi_get_table(name, table_attr->instance, &table_header);
276	if (ACPI_FAILURE(status))
277		return -ENODEV;
278
279	return memory_read_from_buffer(buf, count, &offset,
280				       table_header, table_header->length);
281}
282
283static void acpi_table_attr_init(struct acpi_table_attr *table_attr,
284				 struct acpi_table_header *table_header)
285{
286	struct acpi_table_header *header = NULL;
287	struct acpi_table_attr *attr = NULL;
288
289	sysfs_attr_init(&table_attr->attr.attr);
290	if (table_header->signature[0] != '\0')
291		memcpy(table_attr->name, table_header->signature,
292		       ACPI_NAME_SIZE);
293	else
294		memcpy(table_attr->name, "NULL", 4);
295
296	list_for_each_entry(attr, &acpi_table_attr_list, node) {
297		if (!memcmp(table_attr->name, attr->name, ACPI_NAME_SIZE))
298			if (table_attr->instance < attr->instance)
299				table_attr->instance = attr->instance;
300	}
301	table_attr->instance++;
302
303	if (table_attr->instance > 1 || (table_attr->instance == 1 &&
304					 !acpi_get_table
305					 (table_header->signature, 2, &header)))
306		sprintf(table_attr->name + ACPI_NAME_SIZE, "%d",
307			table_attr->instance);
308
309	table_attr->attr.size = 0;
310	table_attr->attr.read = acpi_table_show;
311	table_attr->attr.attr.name = table_attr->name;
312	table_attr->attr.attr.mode = 0400;
313
314	return;
315}
316
317static acpi_status
318acpi_sysfs_table_handler(u32 event, void *table, void *context)
319{
320	struct acpi_table_attr *table_attr;
321
322	switch (event) {
323	case ACPI_TABLE_EVENT_LOAD:
324		table_attr =
325		    kzalloc(sizeof(struct acpi_table_attr), GFP_KERNEL);
326		if (!table_attr)
327			return AE_NO_MEMORY;
328
329		acpi_table_attr_init(table_attr, table);
330		if (sysfs_create_bin_file(dynamic_tables_kobj,
331					  &table_attr->attr)) {
332			kfree(table_attr);
333			return AE_ERROR;
334		} else
335			list_add_tail(&table_attr->node, &acpi_table_attr_list);
336		break;
337	case ACPI_TABLE_EVENT_UNLOAD:
338		/*
339		 * we do not need to do anything right now
340		 * because the table is not deleted from the
341		 * global table list when unloading it.
342		 */
343		break;
344	default:
345		return AE_BAD_PARAMETER;
346	}
347	return AE_OK;
348}
349
350static int acpi_tables_sysfs_init(void)
351{
352	struct acpi_table_attr *table_attr;
353	struct acpi_table_header *table_header = NULL;
354	int table_index = 0;
355	int result;
356
357	tables_kobj = kobject_create_and_add("tables", acpi_kobj);
358	if (!tables_kobj)
359		goto err;
360
361	dynamic_tables_kobj = kobject_create_and_add("dynamic", tables_kobj);
362	if (!dynamic_tables_kobj)
363		goto err_dynamic_tables;
364
365	do {
366		result = acpi_get_table_by_index(table_index, &table_header);
367		if (!result) {
368			table_index++;
369			table_attr = NULL;
370			table_attr =
371			    kzalloc(sizeof(struct acpi_table_attr), GFP_KERNEL);
372			if (!table_attr)
373				return -ENOMEM;
374
375			acpi_table_attr_init(table_attr, table_header);
376			result =
377			    sysfs_create_bin_file(tables_kobj,
378						  &table_attr->attr);
379			if (result) {
380				kfree(table_attr);
381				return result;
382			} else
383				list_add_tail(&table_attr->node,
384					      &acpi_table_attr_list);
385		}
386	} while (!result);
387	kobject_uevent(tables_kobj, KOBJ_ADD);
388	kobject_uevent(dynamic_tables_kobj, KOBJ_ADD);
389	result = acpi_install_table_handler(acpi_sysfs_table_handler, NULL);
390
391	return result == AE_OK ? 0 : -EINVAL;
392err_dynamic_tables:
393	kobject_put(tables_kobj);
394err:
395	return -ENOMEM;
396}
397
398/*
399 * Detailed ACPI IRQ counters:
400 * /sys/firmware/acpi/interrupts/
401 */
402
403u32 acpi_irq_handled;
404u32 acpi_irq_not_handled;
405
406#define COUNT_GPE 0
407#define COUNT_SCI 1		/* acpi_irq_handled */
408#define COUNT_SCI_NOT 2		/* acpi_irq_not_handled */
409#define COUNT_ERROR 3		/* other */
410#define NUM_COUNTERS_EXTRA 4
411
412struct event_counter {
413	u32 count;
414	u32 flags;
415};
416
417static struct event_counter *all_counters;
418static u32 num_gpes;
419static u32 num_counters;
420static struct attribute **all_attrs;
421static u32 acpi_gpe_count;
422
423static struct attribute_group interrupt_stats_attr_group = {
424	.name = "interrupts",
425};
426
427static struct kobj_attribute *counter_attrs;
428
429static void delete_gpe_attr_array(void)
430{
431	struct event_counter *tmp = all_counters;
432
433	all_counters = NULL;
434	kfree(tmp);
435
436	if (counter_attrs) {
437		int i;
438
439		for (i = 0; i < num_gpes; i++)
440			kfree(counter_attrs[i].attr.name);
441
442		kfree(counter_attrs);
443	}
444	kfree(all_attrs);
445
446	return;
447}
448
449static void gpe_count(u32 gpe_number)
450{
451	acpi_gpe_count++;
452
453	if (!all_counters)
454		return;
455
456	if (gpe_number < num_gpes)
457		all_counters[gpe_number].count++;
458	else
459		all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS +
460			     COUNT_ERROR].count++;
461
462	return;
463}
464
465static void fixed_event_count(u32 event_number)
466{
467	if (!all_counters)
468		return;
469
470	if (event_number < ACPI_NUM_FIXED_EVENTS)
471		all_counters[num_gpes + event_number].count++;
472	else
473		all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS +
474			     COUNT_ERROR].count++;
475
476	return;
477}
478
479static void acpi_gbl_event_handler(u32 event_type, acpi_handle device,
480	u32 event_number, void *context)
481{
482	if (event_type == ACPI_EVENT_TYPE_GPE)
483		gpe_count(event_number);
484
485	if (event_type == ACPI_EVENT_TYPE_FIXED)
486		fixed_event_count(event_number);
487}
488
489static int get_status(u32 index, acpi_event_status *status,
490		      acpi_handle *handle)
491{
492	int result = 0;
493
494	if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS)
495		goto end;
496
497	if (index < num_gpes) {
498		result = acpi_get_gpe_device(index, handle);
499		if (result) {
500			ACPI_EXCEPTION((AE_INFO, AE_NOT_FOUND,
501					"Invalid GPE 0x%x\n", index));
502			goto end;
503		}
504		result = acpi_get_gpe_status(*handle, index, status);
505	} else if (index < (num_gpes + ACPI_NUM_FIXED_EVENTS))
506		result = acpi_get_event_status(index - num_gpes, status);
507
508end:
509	return result;
510}
511
512static ssize_t counter_show(struct kobject *kobj,
513			    struct kobj_attribute *attr, char *buf)
514{
515	int index = attr - counter_attrs;
516	int size;
517	acpi_handle handle;
518	acpi_event_status status;
519	int result = 0;
520
521	all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI].count =
522	    acpi_irq_handled;
523	all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI_NOT].count =
524	    acpi_irq_not_handled;
525	all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE].count =
526	    acpi_gpe_count;
527	size = sprintf(buf, "%8d", all_counters[index].count);
528
529	/* "gpe_all" or "sci" */
530	if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS)
531		goto end;
532
533	result = get_status(index, &status, &handle);
534	if (result)
535		goto end;
536
537	if (!(status & ACPI_EVENT_FLAG_HANDLE))
538		size += sprintf(buf + size, "   invalid");
539	else if (status & ACPI_EVENT_FLAG_ENABLED)
540		size += sprintf(buf + size, "   enabled");
541	else if (status & ACPI_EVENT_FLAG_WAKE_ENABLED)
542		size += sprintf(buf + size, "   wake_enabled");
543	else
544		size += sprintf(buf + size, "   disabled");
545
546end:
547	size += sprintf(buf + size, "\n");
548	return result ? result : size;
549}
550
551/*
552 * counter_set() sets the specified counter.
553 * setting the total "sci" file to any value clears all counters.
554 * enable/disable/clear a gpe/fixed event in user space.
555 */
556static ssize_t counter_set(struct kobject *kobj,
557			   struct kobj_attribute *attr, const char *buf,
558			   size_t size)
559{
560	int index = attr - counter_attrs;
561	acpi_event_status status;
562	acpi_handle handle;
563	int result = 0;
564
565	if (index == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI) {
566		int i;
567		for (i = 0; i < num_counters; ++i)
568			all_counters[i].count = 0;
569		acpi_gpe_count = 0;
570		acpi_irq_handled = 0;
571		acpi_irq_not_handled = 0;
572		goto end;
573	}
574
575	/* show the event status for both GPEs and Fixed Events */
576	result = get_status(index, &status, &handle);
577	if (result)
578		goto end;
579
580	if (!(status & ACPI_EVENT_FLAG_HANDLE)) {
581		printk(KERN_WARNING PREFIX
582		       "Can not change Invalid GPE/Fixed Event status\n");
583		return -EINVAL;
584	}
585
586	if (index < num_gpes) {
587		if (!strcmp(buf, "disable\n") &&
588		    (status & ACPI_EVENT_FLAG_ENABLED))
589			result = acpi_disable_gpe(handle, index);
590		else if (!strcmp(buf, "enable\n") &&
591			 !(status & ACPI_EVENT_FLAG_ENABLED))
592			result = acpi_enable_gpe(handle, index);
593		else if (!strcmp(buf, "clear\n") &&
594			 (status & ACPI_EVENT_FLAG_SET))
595			result = acpi_clear_gpe(handle, index);
596		else
597			all_counters[index].count = strtoul(buf, NULL, 0);
598	} else if (index < num_gpes + ACPI_NUM_FIXED_EVENTS) {
599		int event = index - num_gpes;
600		if (!strcmp(buf, "disable\n") &&
601		    (status & ACPI_EVENT_FLAG_ENABLED))
602			result = acpi_disable_event(event, ACPI_NOT_ISR);
603		else if (!strcmp(buf, "enable\n") &&
604			 !(status & ACPI_EVENT_FLAG_ENABLED))
605			result = acpi_enable_event(event, ACPI_NOT_ISR);
606		else if (!strcmp(buf, "clear\n") &&
607			 (status & ACPI_EVENT_FLAG_SET))
608			result = acpi_clear_event(event);
609		else
610			all_counters[index].count = strtoul(buf, NULL, 0);
611	} else
612		all_counters[index].count = strtoul(buf, NULL, 0);
613
614	if (ACPI_FAILURE(result))
615		result = -EINVAL;
616end:
617	return result ? result : size;
618}
619
620void acpi_irq_stats_init(void)
621{
622	acpi_status status;
623	int i;
624
625	if (all_counters)
626		return;
627
628	num_gpes = acpi_current_gpe_count;
629	num_counters = num_gpes + ACPI_NUM_FIXED_EVENTS + NUM_COUNTERS_EXTRA;
630
631	all_attrs = kzalloc(sizeof(struct attribute *) * (num_counters + 1),
632			    GFP_KERNEL);
633	if (all_attrs == NULL)
634		return;
635
636	all_counters = kzalloc(sizeof(struct event_counter) * (num_counters),
637			       GFP_KERNEL);
638	if (all_counters == NULL)
639		goto fail;
640
641	status = acpi_install_global_event_handler(acpi_gbl_event_handler, NULL);
642	if (ACPI_FAILURE(status))
643		goto fail;
644
645	counter_attrs = kzalloc(sizeof(struct kobj_attribute) * (num_counters),
646				GFP_KERNEL);
647	if (counter_attrs == NULL)
648		goto fail;
649
650	for (i = 0; i < num_counters; ++i) {
651		char buffer[12];
652		char *name;
653
654		if (i < num_gpes)
655			sprintf(buffer, "gpe%02X", i);
656		else if (i == num_gpes + ACPI_EVENT_PMTIMER)
657			sprintf(buffer, "ff_pmtimer");
658		else if (i == num_gpes + ACPI_EVENT_GLOBAL)
659			sprintf(buffer, "ff_gbl_lock");
660		else if (i == num_gpes + ACPI_EVENT_POWER_BUTTON)
661			sprintf(buffer, "ff_pwr_btn");
662		else if (i == num_gpes + ACPI_EVENT_SLEEP_BUTTON)
663			sprintf(buffer, "ff_slp_btn");
664		else if (i == num_gpes + ACPI_EVENT_RTC)
665			sprintf(buffer, "ff_rt_clk");
666		else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE)
667			sprintf(buffer, "gpe_all");
668		else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI)
669			sprintf(buffer, "sci");
670		else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI_NOT)
671			sprintf(buffer, "sci_not");
672		else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR)
673			sprintf(buffer, "error");
674		else
675			sprintf(buffer, "bug%02X", i);
676
677		name = kzalloc(strlen(buffer) + 1, GFP_KERNEL);
678		if (name == NULL)
679			goto fail;
680		strncpy(name, buffer, strlen(buffer) + 1);
681
682		sysfs_attr_init(&counter_attrs[i].attr);
683		counter_attrs[i].attr.name = name;
684		counter_attrs[i].attr.mode = 0644;
685		counter_attrs[i].show = counter_show;
686		counter_attrs[i].store = counter_set;
687
688		all_attrs[i] = &counter_attrs[i].attr;
689	}
690
691	interrupt_stats_attr_group.attrs = all_attrs;
692	if (!sysfs_create_group(acpi_kobj, &interrupt_stats_attr_group))
693		return;
694
695fail:
696	delete_gpe_attr_array();
697	return;
698}
699
700static void __exit interrupt_stats_exit(void)
701{
702	sysfs_remove_group(acpi_kobj, &interrupt_stats_attr_group);
703
704	delete_gpe_attr_array();
705
706	return;
707}
708
709static ssize_t
710acpi_show_profile(struct device *dev, struct device_attribute *attr,
711		  char *buf)
712{
713	return sprintf(buf, "%d\n", acpi_gbl_FADT.preferred_profile);
714}
715
716static const struct device_attribute pm_profile_attr =
717	__ATTR(pm_profile, S_IRUGO, acpi_show_profile, NULL);
718
719int __init acpi_sysfs_init(void)
720{
721	int result;
722
723	result = acpi_tables_sysfs_init();
724	if (result)
725		return result;
726	result = sysfs_create_file(acpi_kobj, &pm_profile_attr.attr);
727	return result;
728}
729