[linux.git] / drivers / acpi / sysfs.c

/*
 * sysfs.c - ACPI sysfs interface to userspace.
 */

#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/moduleparam.h>
#include <acpi/acpi_drivers.h>

#define _COMPONENT		ACPI_SYSTEM_COMPONENT
ACPI_MODULE_NAME("sysfs");

#define PREFIX "ACPI: "

#ifdef CONFIG_ACPI_DEBUG
/*
 * ACPI debug sysfs I/F, including:
 * /sys/modules/acpi/parameters/debug_layer
 * /sys/modules/acpi/parameters/debug_level
 * /sys/modules/acpi/parameters/trace_method_name
 * /sys/modules/acpi/parameters/trace_state
 * /sys/modules/acpi/parameters/trace_debug_layer
 * /sys/modules/acpi/parameters/trace_debug_level
 */

struct acpi_dlayer {
	const char *name;
	unsigned long value;
};
struct acpi_dlevel {
	const char *name;
	unsigned long value;
};
#define ACPI_DEBUG_INIT(v)	{ .name = #v, .value = v }

static const struct acpi_dlayer acpi_debug_layers[] = {
	ACPI_DEBUG_INIT(ACPI_UTILITIES),
	ACPI_DEBUG_INIT(ACPI_HARDWARE),
	ACPI_DEBUG_INIT(ACPI_EVENTS),
	ACPI_DEBUG_INIT(ACPI_TABLES),
	ACPI_DEBUG_INIT(ACPI_NAMESPACE),
	ACPI_DEBUG_INIT(ACPI_PARSER),
	ACPI_DEBUG_INIT(ACPI_DISPATCHER),
	ACPI_DEBUG_INIT(ACPI_EXECUTER),
	ACPI_DEBUG_INIT(ACPI_RESOURCES),
	ACPI_DEBUG_INIT(ACPI_CA_DEBUGGER),
	ACPI_DEBUG_INIT(ACPI_OS_SERVICES),
	ACPI_DEBUG_INIT(ACPI_CA_DISASSEMBLER),
	ACPI_DEBUG_INIT(ACPI_COMPILER),
	ACPI_DEBUG_INIT(ACPI_TOOLS),

	ACPI_DEBUG_INIT(ACPI_BUS_COMPONENT),
	ACPI_DEBUG_INIT(ACPI_AC_COMPONENT),
	ACPI_DEBUG_INIT(ACPI_BATTERY_COMPONENT),
	ACPI_DEBUG_INIT(ACPI_BUTTON_COMPONENT),
	ACPI_DEBUG_INIT(ACPI_SBS_COMPONENT),
	ACPI_DEBUG_INIT(ACPI_FAN_COMPONENT),
	ACPI_DEBUG_INIT(ACPI_PCI_COMPONENT),
	ACPI_DEBUG_INIT(ACPI_POWER_COMPONENT),
	ACPI_DEBUG_INIT(ACPI_CONTAINER_COMPONENT),
	ACPI_DEBUG_INIT(ACPI_SYSTEM_COMPONENT),
	ACPI_DEBUG_INIT(ACPI_THERMAL_COMPONENT),
	ACPI_DEBUG_INIT(ACPI_MEMORY_DEVICE_COMPONENT),
	ACPI_DEBUG_INIT(ACPI_VIDEO_COMPONENT),
	ACPI_DEBUG_INIT(ACPI_PROCESSOR_COMPONENT),
};

static const struct acpi_dlevel acpi_debug_levels[] = {
	ACPI_DEBUG_INIT(ACPI_LV_INIT),
	ACPI_DEBUG_INIT(ACPI_LV_DEBUG_OBJECT),
	ACPI_DEBUG_INIT(ACPI_LV_INFO),

	ACPI_DEBUG_INIT(ACPI_LV_INIT_NAMES),
	ACPI_DEBUG_INIT(ACPI_LV_PARSE),
	ACPI_DEBUG_INIT(ACPI_LV_LOAD),
	ACPI_DEBUG_INIT(ACPI_LV_DISPATCH),
	ACPI_DEBUG_INIT(ACPI_LV_EXEC),
	ACPI_DEBUG_INIT(ACPI_LV_NAMES),
	ACPI_DEBUG_INIT(ACPI_LV_OPREGION),
	ACPI_DEBUG_INIT(ACPI_LV_BFIELD),
	ACPI_DEBUG_INIT(ACPI_LV_TABLES),
	ACPI_DEBUG_INIT(ACPI_LV_VALUES),
	ACPI_DEBUG_INIT(ACPI_LV_OBJECTS),
	ACPI_DEBUG_INIT(ACPI_LV_RESOURCES),
	ACPI_DEBUG_INIT(ACPI_LV_USER_REQUESTS),
	ACPI_DEBUG_INIT(ACPI_LV_PACKAGE),

	ACPI_DEBUG_INIT(ACPI_LV_ALLOCATIONS),
	ACPI_DEBUG_INIT(ACPI_LV_FUNCTIONS),
	ACPI_DEBUG_INIT(ACPI_LV_OPTIMIZATIONS),

	ACPI_DEBUG_INIT(ACPI_LV_MUTEX),
	ACPI_DEBUG_INIT(ACPI_LV_THREADS),
	ACPI_DEBUG_INIT(ACPI_LV_IO),
	ACPI_DEBUG_INIT(ACPI_LV_INTERRUPTS),

	ACPI_DEBUG_INIT(ACPI_LV_AML_DISASSEMBLE),
	ACPI_DEBUG_INIT(ACPI_LV_VERBOSE_INFO),
	ACPI_DEBUG_INIT(ACPI_LV_FULL_TABLES),
	ACPI_DEBUG_INIT(ACPI_LV_EVENTS),
};

static int param_get_debug_layer(char *buffer, const struct kernel_param *kp)
{
	int result = 0;
	int i;

	result = sprintf(buffer, "%-25s\tHex        SET\n", "Description");

	for (i = 0; i < ARRAY_SIZE(acpi_debug_layers); i++) {
		result += sprintf(buffer + result, "%-25s\t0x%08lX [%c]\n",
				  acpi_debug_layers[i].name,
				  acpi_debug_layers[i].value,
				  (acpi_dbg_layer & acpi_debug_layers[i].value)
				  ? '*' : ' ');
	}
	result +=
	    sprintf(buffer + result, "%-25s\t0x%08X [%c]\n", "ACPI_ALL_DRIVERS",
		    ACPI_ALL_DRIVERS,
		    (acpi_dbg_layer & ACPI_ALL_DRIVERS) ==
		    ACPI_ALL_DRIVERS ? '*' : (acpi_dbg_layer & ACPI_ALL_DRIVERS)
		    == 0 ? ' ' : '-');
	result +=
	    sprintf(buffer + result,
		    "--\ndebug_layer = 0x%08X ( * = enabled)\n",
		    acpi_dbg_layer);

	return result;
}

static int param_get_debug_level(char *buffer, const struct kernel_param *kp)
{
	int result = 0;
	int i;

	result = sprintf(buffer, "%-25s\tHex        SET\n", "Description");

	for (i = 0; i < ARRAY_SIZE(acpi_debug_levels); i++) {
		result += sprintf(buffer + result, "%-25s\t0x%08lX [%c]\n",
				  acpi_debug_levels[i].name,
				  acpi_debug_levels[i].value,
				  (acpi_dbg_level & acpi_debug_levels[i].value)
				  ? '*' : ' ');
	}
	result +=
	    sprintf(buffer + result, "--\ndebug_level = 0x%08X (* = enabled)\n",
		    acpi_dbg_level);

	return result;
}

static struct kernel_param_ops param_ops_debug_layer = {
	.set = param_set_uint,
	.get = param_get_debug_layer,
};

static struct kernel_param_ops param_ops_debug_level = {
	.set = param_set_uint,
	.get = param_get_debug_level,
};

module_param_cb(debug_layer, &param_ops_debug_layer, &acpi_dbg_layer, 0644);
module_param_cb(debug_level, &param_ops_debug_level, &acpi_dbg_level, 0644);

static char trace_method_name[6];
module_param_string(trace_method_name, trace_method_name, 6, 0644);
static unsigned int trace_debug_layer;
module_param(trace_debug_layer, uint, 0644);
static unsigned int trace_debug_level;
module_param(trace_debug_level, uint, 0644);

static int param_set_trace_state(const char *val, struct kernel_param *kp)
{
	int result = 0;

	if (!strncmp(val, "enable", strlen("enable") - 1)) {
		result = acpi_debug_trace(trace_method_name, trace_debug_level,
					  trace_debug_layer, 0);
		if (result)
			result = -EBUSY;
		goto exit;
	}

	if (!strncmp(val, "disable", strlen("disable") - 1)) {
		int name = 0;
		result = acpi_debug_trace((char *)&name, trace_debug_level,
					  trace_debug_layer, 0);
		if (result)
			result = -EBUSY;
		goto exit;
	}

	if (!strncmp(val, "1", 1)) {
		result = acpi_debug_trace(trace_method_name, trace_debug_level,
					  trace_debug_layer, 1);
		if (result)
			result = -EBUSY;
		goto exit;
	}

	result = -EINVAL;
exit:
	return result;
}

static int param_get_trace_state(char *buffer, struct kernel_param *kp)
{
	if (!acpi_gbl_trace_method_name)
		return sprintf(buffer, "disable");
	else {
		if (acpi_gbl_trace_flags & 1)
			return sprintf(buffer, "1");
		else
			return sprintf(buffer, "enable");
	}
	return 0;
}

module_param_call(trace_state, param_set_trace_state, param_get_trace_state,
		  NULL, 0644);
#endif /* CONFIG_ACPI_DEBUG */

/* /sys/module/acpi/parameters/acpica_version */
static int param_get_acpica_version(char *buffer, struct kernel_param *kp)
{
	int result;

	result = sprintf(buffer, "%x", ACPI_CA_VERSION);

	return result;
}

module_param_call(acpica_version, NULL, param_get_acpica_version, NULL, 0444);

/*
 * ACPI table sysfs I/F:
 * /sys/firmware/acpi/tables/
 * /sys/firmware/acpi/tables/dynamic/
 */

static LIST_HEAD(acpi_table_attr_list);
static struct kobject *tables_kobj;
static struct kobject *dynamic_tables_kobj;

struct acpi_table_attr {
	struct bin_attribute attr;
	char name[8];
	int instance;
	struct list_head node;
};

static ssize_t acpi_table_show(struct file *filp, struct kobject *kobj,
			       struct bin_attribute *bin_attr, char *buf,
			       loff_t offset, size_t count)
{
	struct acpi_table_attr *table_attr =
	    container_of(bin_attr, struct acpi_table_attr, attr);
	struct acpi_table_header *table_header = NULL;
	acpi_status status;
	char name[ACPI_NAME_SIZE];

	if (strncmp(table_attr->name, "NULL", 4))
		memcpy(name, table_attr->name, ACPI_NAME_SIZE);
	else
		memcpy(name, "\0\0\0\0", 4);

	status = acpi_get_table(name, table_attr->instance, &table_header);
	if (ACPI_FAILURE(status))
		return -ENODEV;

	return memory_read_from_buffer(buf, count, &offset,
				       table_header, table_header->length);
}

static void acpi_table_attr_init(struct acpi_table_attr *table_attr,
				 struct acpi_table_header *table_header)
{
	struct acpi_table_header *header = NULL;
	struct acpi_table_attr *attr = NULL;

	sysfs_attr_init(&table_attr->attr.attr);
	if (table_header->signature[0] != '\0')
		memcpy(table_attr->name, table_header->signature,
		       ACPI_NAME_SIZE);
	else
		memcpy(table_attr->name, "NULL", 4);

	list_for_each_entry(attr, &acpi_table_attr_list, node) {
		if (!memcmp(table_attr->name, attr->name, ACPI_NAME_SIZE))
			if (table_attr->instance < attr->instance)
				table_attr->instance = attr->instance;
	}
	table_attr->instance++;

	if (table_attr->instance > 1 || (table_attr->instance == 1 &&
					 !acpi_get_table
					 (table_header->signature, 2, &header)))
		sprintf(table_attr->name + ACPI_NAME_SIZE, "%d",
			table_attr->instance);

	table_attr->attr.size = 0;
	table_attr->attr.read = acpi_table_show;
	table_attr->attr.attr.name = table_attr->name;
	table_attr->attr.attr.mode = 0400;

	return;
}

static acpi_status
acpi_sysfs_table_handler(u32 event, void *table, void *context)
{
	struct acpi_table_attr *table_attr;

	switch (event) {
	case ACPI_TABLE_EVENT_LOAD:
		table_attr =
		    kzalloc(sizeof(struct acpi_table_attr), GFP_KERNEL);
		if (!table_attr)
			return AE_NO_MEMORY;

		acpi_table_attr_init(table_attr, table);
		if (sysfs_create_bin_file(dynamic_tables_kobj,
					  &table_attr->attr)) {
			kfree(table_attr);
			return AE_ERROR;
		} else
			list_add_tail(&table_attr->node, &acpi_table_attr_list);
		break;
	case ACPI_TABLE_EVENT_UNLOAD:
		/*
		 * we do not need to do anything right now
		 * because the table is not deleted from the
		 * global table list when unloading it.
		 */
		break;
	default:
		return AE_BAD_PARAMETER;
	}
	return AE_OK;
}

static int acpi_tables_sysfs_init(void)
{
	struct acpi_table_attr *table_attr;
	struct acpi_table_header *table_header = NULL;
	int table_index = 0;
	int result;

	tables_kobj = kobject_create_and_add("tables", acpi_kobj);
	if (!tables_kobj)
		goto err;

	dynamic_tables_kobj = kobject_create_and_add("dynamic", tables_kobj);
	if (!dynamic_tables_kobj)
		goto err_dynamic_tables;

	do {
		result = acpi_get_table_by_index(table_index, &table_header);
		if (!result) {
			table_index++;
			table_attr = NULL;
			table_attr =
			    kzalloc(sizeof(struct acpi_table_attr), GFP_KERNEL);
			if (!table_attr)
				return -ENOMEM;

			acpi_table_attr_init(table_attr, table_header);
			result =
			    sysfs_create_bin_file(tables_kobj,
						  &table_attr->attr);
			if (result) {
				kfree(table_attr);
				return result;
			} else
				list_add_tail(&table_attr->node,
					      &acpi_table_attr_list);
		}
	} while (!result);
	kobject_uevent(tables_kobj, KOBJ_ADD);
	kobject_uevent(dynamic_tables_kobj, KOBJ_ADD);
	result = acpi_install_table_handler(acpi_sysfs_table_handler, NULL);

	return result == AE_OK ? 0 : -EINVAL;
err_dynamic_tables:
	kobject_put(tables_kobj);
err:
	return -ENOMEM;
}

/*
 * Detailed ACPI IRQ counters:
 * /sys/firmware/acpi/interrupts/
 */

u32 acpi_irq_handled;
u32 acpi_irq_not_handled;

#define COUNT_GPE 0
#define COUNT_SCI 1		/* acpi_irq_handled */
#define COUNT_SCI_NOT 2		/* acpi_irq_not_handled */
#define COUNT_ERROR 3		/* other */
#define NUM_COUNTERS_EXTRA 4

struct event_counter {
	u32 count;
	u32 flags;
};

static struct event_counter *all_counters;
static u32 num_gpes;
static u32 num_counters;
static struct attribute **all_attrs;
static u32 acpi_gpe_count;

static struct attribute_group interrupt_stats_attr_group = {
	.name = "interrupts",
};

static struct kobj_attribute *counter_attrs;

static void delete_gpe_attr_array(void)
{
	struct event_counter *tmp = all_counters;

	all_counters = NULL;
	kfree(tmp);

	if (counter_attrs) {
		int i;

		for (i = 0; i < num_gpes; i++)
			kfree(counter_attrs[i].attr.name);

		kfree(counter_attrs);
	}
	kfree(all_attrs);

	return;
}

void acpi_os_gpe_count(u32 gpe_number)
{
	acpi_gpe_count++;

	if (!all_counters)
		return;

	if (gpe_number < num_gpes)
		all_counters[gpe_number].count++;
	else
		all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS +
			     COUNT_ERROR].count++;

	return;
}

void acpi_os_fixed_event_count(u32 event_number)
{
	if (!all_counters)
		return;

	if (event_number < ACPI_NUM_FIXED_EVENTS)
		all_counters[num_gpes + event_number].count++;
	else
		all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS +
			     COUNT_ERROR].count++;

	return;
}

static int get_status(u32 index, acpi_event_status *status,
		      acpi_handle *handle)
{
	int result = 0;

	if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS)
		goto end;

	if (index < num_gpes) {
		result = acpi_get_gpe_device(index, handle);
		if (result) {
			ACPI_EXCEPTION((AE_INFO, AE_NOT_FOUND,
					"Invalid GPE 0x%x\n", index));
			goto end;
		}
		result = acpi_get_gpe_status(*handle, index, status);
	} else if (index < (num_gpes + ACPI_NUM_FIXED_EVENTS))
		result = acpi_get_event_status(index - num_gpes, status);

end:
	return result;
}

static ssize_t counter_show(struct kobject *kobj,
			    struct kobj_attribute *attr, char *buf)
{
	int index = attr - counter_attrs;
	int size;
	acpi_handle handle;
	acpi_event_status status;
	int result = 0;

	all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI].count =
	    acpi_irq_handled;
	all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI_NOT].count =
	    acpi_irq_not_handled;
	all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE].count =
	    acpi_gpe_count;
	size = sprintf(buf, "%8d", all_counters[index].count);

	/* "gpe_all" or "sci" */
	if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS)
		goto end;

	result = get_status(index, &status, &handle);
	if (result)
		goto end;

	if (!(status & ACPI_EVENT_FLAG_HANDLE))
		size += sprintf(buf + size, "   invalid");
	else if (status & ACPI_EVENT_FLAG_ENABLED)
		size += sprintf(buf + size, "   enabled");
	else if (status & ACPI_EVENT_FLAG_WAKE_ENABLED)
		size += sprintf(buf + size, "   wake_enabled");
	else
		size += sprintf(buf + size, "   disabled");

end:
	size += sprintf(buf + size, "\n");
	return result ? result : size;
}

/*
 * counter_set() sets the specified counter.
 * setting the total "sci" file to any value clears all counters.
 * enable/disable/clear a gpe/fixed event in user space.
 */
static ssize_t counter_set(struct kobject *kobj,
			   struct kobj_attribute *attr, const char *buf,
			   size_t size)
{
	int index = attr - counter_attrs;
	acpi_event_status status;
	acpi_handle handle;
	int result = 0;

	if (index == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI) {
		int i;
		for (i = 0; i < num_counters; ++i)
			all_counters[i].count = 0;
		acpi_gpe_count = 0;
		acpi_irq_handled = 0;
		acpi_irq_not_handled = 0;
		goto end;
	}

	/* show the event status for both GPEs and Fixed Events */
	result = get_status(index, &status, &handle);
	if (result)
		goto end;

	if (!(status & ACPI_EVENT_FLAG_HANDLE)) {
		printk(KERN_WARNING PREFIX
		       "Can not change Invalid GPE/Fixed Event status\n");
		return -EINVAL;
	}

	if (index < num_gpes) {
		if (!strcmp(buf, "disable\n") &&
		    (status & ACPI_EVENT_FLAG_ENABLED))
			result = acpi_disable_gpe(handle, index);
		else if (!strcmp(buf, "enable\n") &&
			 !(status & ACPI_EVENT_FLAG_ENABLED))
			result = acpi_enable_gpe(handle, index);
		else if (!strcmp(buf, "clear\n") &&
			 (status & ACPI_EVENT_FLAG_SET))
			result = acpi_clear_gpe(handle, index);
		else
			all_counters[index].count = strtoul(buf, NULL, 0);
	} else if (index < num_gpes + ACPI_NUM_FIXED_EVENTS) {
		int event = index - num_gpes;
		if (!strcmp(buf, "disable\n") &&
		    (status & ACPI_EVENT_FLAG_ENABLED))
			result = acpi_disable_event(event, ACPI_NOT_ISR);
		else if (!strcmp(buf, "enable\n") &&
			 !(status & ACPI_EVENT_FLAG_ENABLED))
			result = acpi_enable_event(event, ACPI_NOT_ISR);
		else if (!strcmp(buf, "clear\n") &&
			 (status & ACPI_EVENT_FLAG_SET))
			result = acpi_clear_event(event);
		else
			all_counters[index].count = strtoul(buf, NULL, 0);
	} else
		all_counters[index].count = strtoul(buf, NULL, 0);

	if (ACPI_FAILURE(result))
		result = -EINVAL;
end:
	return result ? result : size;
}

void acpi_irq_stats_init(void)
{
	int i;

	if (all_counters)
		return;

	num_gpes = acpi_current_gpe_count;
	num_counters = num_gpes + ACPI_NUM_FIXED_EVENTS + NUM_COUNTERS_EXTRA;

	all_attrs = kzalloc(sizeof(struct attribute *) * (num_counters + 1),
			    GFP_KERNEL);
	if (all_attrs == NULL)
		return;

	all_counters = kzalloc(sizeof(struct event_counter) * (num_counters),
			       GFP_KERNEL);
	if (all_counters == NULL)
		goto fail;

	counter_attrs = kzalloc(sizeof(struct kobj_attribute) * (num_counters),
				GFP_KERNEL);
	if (counter_attrs == NULL)
		goto fail;

	for (i = 0; i < num_counters; ++i) {
		char buffer[12];
		char *name;

		if (i < num_gpes)
			sprintf(buffer, "gpe%02X", i);
		else if (i == num_gpes + ACPI_EVENT_PMTIMER)
			sprintf(buffer, "ff_pmtimer");
		else if (i == num_gpes + ACPI_EVENT_GLOBAL)
			sprintf(buffer, "ff_gbl_lock");
		else if (i == num_gpes + ACPI_EVENT_POWER_BUTTON)
			sprintf(buffer, "ff_pwr_btn");
		else if (i == num_gpes + ACPI_EVENT_SLEEP_BUTTON)
			sprintf(buffer, "ff_slp_btn");
		else if (i == num_gpes + ACPI_EVENT_RTC)
			sprintf(buffer, "ff_rt_clk");
		else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE)
			sprintf(buffer, "gpe_all");
		else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI)
			sprintf(buffer, "sci");
		else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI_NOT)
			sprintf(buffer, "sci_not");
		else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR)
			sprintf(buffer, "error");
		else
			sprintf(buffer, "bug%02X", i);

		name = kzalloc(strlen(buffer) + 1, GFP_KERNEL);
		if (name == NULL)
			goto fail;
		strncpy(name, buffer, strlen(buffer) + 1);

		sysfs_attr_init(&counter_attrs[i].attr);
		counter_attrs[i].attr.name = name;
		counter_attrs[i].attr.mode = 0644;
		counter_attrs[i].show = counter_show;
		counter_attrs[i].store = counter_set;

		all_attrs[i] = &counter_attrs[i].attr;
	}

	interrupt_stats_attr_group.attrs = all_attrs;
	if (!sysfs_create_group(acpi_kobj, &interrupt_stats_attr_group))
		return;

fail:
	delete_gpe_attr_array();
	return;
}

static void __exit interrupt_stats_exit(void)
{
	sysfs_remove_group(acpi_kobj, &interrupt_stats_attr_group);

	delete_gpe_attr_array();

	return;
}

int __init acpi_sysfs_init(void)
{
	int result;

	result = acpi_tables_sysfs_init();

	return result;
}
Commit	Line	Data
1c8fce27 ZR	1	/*
	2	* sysfs.c - ACPI sysfs interface to userspace.
	3	*/
	4
	5	#include <linux/init.h>
	6	#include <linux/kernel.h>
	7	#include <linux/moduleparam.h>
	8	#include <acpi/acpi_drivers.h>
	9
	10	#define _COMPONENT ACPI_SYSTEM_COMPONENT
	11	ACPI_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
	26	struct acpi_dlayer {
	27	const char *name;
	28	unsigned long value;
	29	};
	30	struct acpi_dlevel {
	31	const char *name;
	32	unsigned long value;
	33	};
	34	#define ACPI_DEBUG_INIT(v) { .name = #v, .value = v }
	35
	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),
	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
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),
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
ec652b35	103	static int param_get_debug_layer(char buffer, const struct kernel_param kp)
1c8fce27 ZR	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
ec652b35	131	static int param_get_debug_level(char buffer, const struct kernel_param kp)
1c8fce27 ZR	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
ec652b35 ZR	152	static struct kernel_param_ops param_ops_debug_layer = {
	153	.set = param_set_uint,
	154	.get = param_get_debug_layer,
	155	};
	156
	157	static struct kernel_param_ops param_ops_debug_level = {
	158	.set = param_set_uint,
	159	.get = param_get_debug_level,
	160	};
	161
	162	module_param_cb(debug_layer, &param_ops_debug_layer, &acpi_dbg_layer, 0644);
	163	module_param_cb(debug_level, &param_ops_debug_level, &acpi_dbg_level, 0644);
1c8fce27 ZR	164
	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);
	171
	172	static int param_set_trace_state(const char val, struct kernel_param kp)
	173	{
	174	int result = 0;
	175
	176	if (!strncmp(val, "enable", strlen("enable") - 1)) {
	177	result = acpi_debug_trace(trace_method_name, trace_debug_level,
	178	trace_debug_layer, 0);
	179	if (result)
	180	result = -EBUSY;
	181	goto exit;
	182	}
	183
	184	if (!strncmp(val, "disable", strlen("disable") - 1)) {
	185	int name = 0;
	186	result = acpi_debug_trace((char *)&name, trace_debug_level,
	187	trace_debug_layer, 0);
	188	if (result)
	189	result = -EBUSY;
	190	goto exit;
	191	}
	192
	193	if (!strncmp(val, "1", 1)) {
	194	result = acpi_debug_trace(trace_method_name, trace_debug_level,
	195	trace_debug_layer, 1);
	196	if (result)
	197	result = -EBUSY;
	198	goto exit;
	199	}
	200
	201	result = -EINVAL;
	202	exit:
	203	return result;
	204	}
	205
	206	static 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
	219	module_param_call(trace_state, param_set_trace_state, param_get_trace_state,
	220	NULL, 0644);
	221	#endif /* CONFIG_ACPI_DEBUG */
	222
	223	/* /sys/module/acpi/parameters/acpica_version */
	224	static int param_get_acpica_version(char buffer, struct kernel_param kp)
	225	{
	226	int result;
	227
228	result = sprintf(buffer, "%x", ACPI_CA_VERSION);
229
230	return result;
231	}
232
233	module_param_call(acpica_version, NULL, param_get_acpica_version, NULL, 0444);
234
235	/*
236	* ACPI table sysfs I/F:
237	* /sys/firmware/acpi/tables/
238	* /sys/firmware/acpi/tables/dynamic/
239	*/
240
241	static LIST_HEAD(acpi_table_attr_list);
242	static struct kobject *tables_kobj;
243	static struct kobject *dynamic_tables_kobj;
244
245	struct acpi_table_attr {
246	struct bin_attribute attr;
247	char name[8];
248	int instance;
249	struct list_head node;
250	};
251
252	static ssize_t acpi_table_show(struct file filp, struct kobject kobj,
253	struct bin_attribute bin_attr, char buf,
254	loff_t offset, size_t count)
255	{
256	struct acpi_table_attr *table_attr =
257	container_of(bin_attr, struct acpi_table_attr, attr);
258	struct acpi_table_header *table_header = NULL;
259	acpi_status status;
260	char name[ACPI_NAME_SIZE];
261
262	if (strncmp(table_attr->name, "NULL", 4))
263	memcpy(name, table_attr->name, ACPI_NAME_SIZE);
264	else
265	memcpy(name, "\0\0\0\0", 4);
266
267	status = acpi_get_table(name, table_attr->instance, &table_header);
268	if (ACPI_FAILURE(status))
269	return -ENODEV;
270
271	return memory_read_from_buffer(buf, count, &offset,
272	table_header, table_header->length);
273	}
274
275	static void acpi_table_attr_init(struct acpi_table_attr *table_attr,
276	struct acpi_table_header *table_header)
277	{
278	struct acpi_table_header *header = NULL;
279	struct acpi_table_attr *attr = NULL;
280
281	sysfs_attr_init(&table_attr->attr.attr);
282	if (table_header->signature[0] != '\0')
283	memcpy(table_attr->name, table_header->signature,
284	ACPI_NAME_SIZE);
285	else
286	memcpy(table_attr->name, "NULL", 4);
287
288	list_for_each_entry(attr, &acpi_table_attr_list, node) {
289	if (!memcmp(table_attr->name, attr->name, ACPI_NAME_SIZE))
290	if (table_attr->instance < attr->instance)
291	table_attr->instance = attr->instance;
292	}
293	table_attr->instance++;
294
295	if (table_attr->instance > 1 \|\| (table_attr->instance == 1 &&
296	!acpi_get_table
297	(table_header->signature, 2, &header)))
298	sprintf(table_attr->name + ACPI_NAME_SIZE, "%d",
299	table_attr->instance);
300
301	table_attr->attr.size = 0;
302	table_attr->attr.read = acpi_table_show;
303	table_attr->attr.attr.name = table_attr->name;
304	table_attr->attr.attr.mode = 0400;
305
306	return;
307	}
308
309	static acpi_status
310	acpi_sysfs_table_handler(u32 event, void table, void context)
311	{
312	struct acpi_table_attr *table_attr;
313
314	switch (event) {
315	case ACPI_TABLE_EVENT_LOAD:
316	table_attr =
317	kzalloc(sizeof(struct acpi_table_attr), GFP_KERNEL);
318	if (!table_attr)
319	return AE_NO_MEMORY;
320
321	acpi_table_attr_init(table_attr, table);
322	if (sysfs_create_bin_file(dynamic_tables_kobj,
323	&table_attr->attr)) {
324	kfree(table_attr);
325	return AE_ERROR;
326	} else
327	list_add_tail(&table_attr->node, &acpi_table_attr_list);
328	break;
329	case ACPI_TABLE_EVENT_UNLOAD:
330	/*
331	* we do not need to do anything right now
332	* because the table is not deleted from the
333	* global table list when unloading it.
334	*/
335	break;
336	default:
337	return AE_BAD_PARAMETER;
338	}
339	return AE_OK;
340	}
341
342	static int acpi_tables_sysfs_init(void)
343	{
344	struct acpi_table_attr *table_attr;
345	struct acpi_table_header *table_header = NULL;
346	int table_index = 0;
347	int result;
348
349	tables_kobj = kobject_create_and_add("tables", acpi_kobj);
350	if (!tables_kobj)
351	goto err;
352
353	dynamic_tables_kobj = kobject_create_and_add("dynamic", tables_kobj);
354	if (!dynamic_tables_kobj)
355	goto err_dynamic_tables;
356
357	do {
358	result = acpi_get_table_by_index(table_index, &table_header);
359	if (!result) {
360	table_index++;
361	table_attr = NULL;
362	table_attr =
363	kzalloc(sizeof(struct acpi_table_attr), GFP_KERNEL);
364	if (!table_attr)
365	return -ENOMEM;
366
367	acpi_table_attr_init(table_attr, table_header);
368	result =
369	sysfs_create_bin_file(tables_kobj,
370	&table_attr->attr);
371	if (result) {
372	kfree(table_attr);
373	return result;
374	} else
375	list_add_tail(&table_attr->node,
376	&acpi_table_attr_list);
377	}
378	} while (!result);
379	kobject_uevent(tables_kobj, KOBJ_ADD);
380	kobject_uevent(dynamic_tables_kobj, KOBJ_ADD);
381	result = acpi_install_table_handler(acpi_sysfs_table_handler, NULL);
382
383	return result == AE_OK ? 0 : -EINVAL;
384	err_dynamic_tables:
385	kobject_put(tables_kobj);
386	err:
387	return -ENOMEM;
388	}
389
390	/*
391	* Detailed ACPI IRQ counters:
392	* /sys/firmware/acpi/interrupts/
393	*/
394
395	u32 acpi_irq_handled;
396	u32 acpi_irq_not_handled;
397
398	#define COUNT_GPE 0
399	#define COUNT_SCI 1 /* acpi_irq_handled */
400	#define COUNT_SCI_NOT 2 /* acpi_irq_not_handled */
401	#define COUNT_ERROR 3 /* other */
402	#define NUM_COUNTERS_EXTRA 4
403
404	struct event_counter {
405	u32 count;
406	u32 flags;
407	};
408
409	static struct event_counter *all_counters;
410	static u32 num_gpes;
411	static u32 num_counters;
412	static struct attribute **all_attrs;
413	static u32 acpi_gpe_count;
414
415	static struct attribute_group interrupt_stats_attr_group = {
416	.name = "interrupts",
417	};
418
419	static struct kobj_attribute *counter_attrs;
420
421	static void delete_gpe_attr_array(void)
422	{
423	struct event_counter *tmp = all_counters;
424
425	all_counters = NULL;
426	kfree(tmp);
427
428	if (counter_attrs) {
429	int i;
430
431	for (i = 0; i < num_gpes; i++)
432	kfree(counter_attrs[i].attr.name);
433
434	kfree(counter_attrs);
435	}
436	kfree(all_attrs);
437
438	return;
439	}
440
441	void acpi_os_gpe_count(u32 gpe_number)
442	{
443	acpi_gpe_count++;
444
445	if (!all_counters)
446	return;
447
448	if (gpe_number < num_gpes)
449	all_counters[gpe_number].count++;
450	else
451	all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS +
452	COUNT_ERROR].count++;
453
454	return;
455	}
456
457	void acpi_os_fixed_event_count(u32 event_number)
458	{
459	if (!all_counters)
460	return;
461
462	if (event_number < ACPI_NUM_FIXED_EVENTS)
463	all_counters[num_gpes + event_number].count++;
464	else
465	all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS +
466	COUNT_ERROR].count++;
467
468	return;
469	}
470
471	static int get_status(u32 index, acpi_event_status *status,
472	acpi_handle *handle)
473	{
474	int result = 0;
475
476	if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS)
477	goto end;
478
479	if (index < num_gpes) {
480	result = acpi_get_gpe_device(index, handle);
481	if (result) {
482	ACPI_EXCEPTION((AE_INFO, AE_NOT_FOUND,
483	"Invalid GPE 0x%x\n", index));
484	goto end;
485	}
486	result = acpi_get_gpe_status(*handle, index, status);
487	} else if (index < (num_gpes + ACPI_NUM_FIXED_EVENTS))
488	result = acpi_get_event_status(index - num_gpes, status);
489
490	end:
491	return result;
492	}
493
494	static ssize_t counter_show(struct kobject *kobj,
495	struct kobj_attribute attr, char buf)
496	{
497	int index = attr - counter_attrs;
498	int size;
499	acpi_handle handle;
500	acpi_event_status status;
501	int result = 0;
502
503	all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI].count =
504	acpi_irq_handled;
505	all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI_NOT].count =
506	acpi_irq_not_handled;
507	all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE].count =
508	acpi_gpe_count;
509	size = sprintf(buf, "%8d", all_counters[index].count);
510
511	/* "gpe_all" or "sci" */
512	if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS)
513	goto end;
514
515	result = get_status(index, &status, &handle);
516	if (result)
517	goto end;
518
519	if (!(status & ACPI_EVENT_FLAG_HANDLE))
520	size += sprintf(buf + size, " invalid");
521	else if (status & ACPI_EVENT_FLAG_ENABLED)
522	size += sprintf(buf + size, " enabled");
523	else if (status & ACPI_EVENT_FLAG_WAKE_ENABLED)
524	size += sprintf(buf + size, " wake_enabled");
525	else
526	size += sprintf(buf + size, " disabled");
527
528	end:
529	size += sprintf(buf + size, "\n");
530	return result ? result : size;
531	}
532
533	/*
534	* counter_set() sets the specified counter.
535	* setting the total "sci" file to any value clears all counters.
536	* enable/disable/clear a gpe/fixed event in user space.
537	*/
538	static ssize_t counter_set(struct kobject *kobj,
539	struct kobj_attribute attr, const char buf,
540	size_t size)
541	{
542	int index = attr - counter_attrs;
543	acpi_event_status status;
544	acpi_handle handle;
545	int result = 0;
546
547	if (index == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI) {
548	int i;
549	for (i = 0; i < num_counters; ++i)
550	all_counters[i].count = 0;
551	acpi_gpe_count = 0;
552	acpi_irq_handled = 0;
553	acpi_irq_not_handled = 0;
554	goto end;
555	}
556
557	/* show the event status for both GPEs and Fixed Events */
558	result = get_status(index, &status, &handle);
559	if (result)
560	goto end;
561
562	if (!(status & ACPI_EVENT_FLAG_HANDLE)) {
563	printk(KERN_WARNING PREFIX
564	"Can not change Invalid GPE/Fixed Event status\n");
565	return -EINVAL;
566	}
567
568	if (index < num_gpes) {
569	if (!strcmp(buf, "disable\n") &&
570	(status & ACPI_EVENT_FLAG_ENABLED))
571	result = acpi_disable_gpe(handle, index);
572	else if (!strcmp(buf, "enable\n") &&
573	!(status & ACPI_EVENT_FLAG_ENABLED))
574	result = acpi_enable_gpe(handle, index);
575	else if (!strcmp(buf, "clear\n") &&
576	(status & ACPI_EVENT_FLAG_SET))
577	result = acpi_clear_gpe(handle, index);
578	else
579	all_counters[index].count = strtoul(buf, NULL, 0);
580	} else if (index < num_gpes + ACPI_NUM_FIXED_EVENTS) {
581	int event = index - num_gpes;
582	if (!strcmp(buf, "disable\n") &&
583	(status & ACPI_EVENT_FLAG_ENABLED))
584	result = acpi_disable_event(event, ACPI_NOT_ISR);
585	else if (!strcmp(buf, "enable\n") &&
586	!(status & ACPI_EVENT_FLAG_ENABLED))
587	result = acpi_enable_event(event, ACPI_NOT_ISR);
588	else if (!strcmp(buf, "clear\n") &&
589	(status & ACPI_EVENT_FLAG_SET))
590	result = acpi_clear_event(event);
591	else
592	all_counters[index].count = strtoul(buf, NULL, 0);
593	} else
594	all_counters[index].count = strtoul(buf, NULL, 0);
595
596	if (ACPI_FAILURE(result))
597	result = -EINVAL;
598	end:
599	return result ? result : size;
600	}
601
602	void acpi_irq_stats_init(void)
603	{
604	int i;
605
606	if (all_counters)
607	return;
608
609	num_gpes = acpi_current_gpe_count;
610	num_counters = num_gpes + ACPI_NUM_FIXED_EVENTS + NUM_COUNTERS_EXTRA;
611
612	all_attrs = kzalloc(sizeof(struct attribute ) (num_counters + 1),
613	GFP_KERNEL);
614	if (all_attrs == NULL)
615	return;
616
617	all_counters = kzalloc(sizeof(struct event_counter) * (num_counters),
618	GFP_KERNEL);
619	if (all_counters == NULL)
620	goto fail;
621
622	counter_attrs = kzalloc(sizeof(struct kobj_attribute) * (num_counters),
623	GFP_KERNEL);
624	if (counter_attrs == NULL)
625	goto fail;
626
627	for (i = 0; i < num_counters; ++i) {
628	char buffer[12];
629	char *name;
630
631	if (i < num_gpes)
632	sprintf(buffer, "gpe%02X", i);
633	else if (i == num_gpes + ACPI_EVENT_PMTIMER)
634	sprintf(buffer, "ff_pmtimer");
635	else if (i == num_gpes + ACPI_EVENT_GLOBAL)
636	sprintf(buffer, "ff_gbl_lock");
637	else if (i == num_gpes + ACPI_EVENT_POWER_BUTTON)
638	sprintf(buffer, "ff_pwr_btn");
639	else if (i == num_gpes + ACPI_EVENT_SLEEP_BUTTON)
640	sprintf(buffer, "ff_slp_btn");
641	else if (i == num_gpes + ACPI_EVENT_RTC)
642	sprintf(buffer, "ff_rt_clk");
643	else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE)
644	sprintf(buffer, "gpe_all");
645	else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI)
646	sprintf(buffer, "sci");
647	else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI_NOT)
648	sprintf(buffer, "sci_not");
649	else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR)
650	sprintf(buffer, "error");
651	else
652	sprintf(buffer, "bug%02X", i);
653
654	name = kzalloc(strlen(buffer) + 1, GFP_KERNEL);
655	if (name == NULL)
656	goto fail;
657	strncpy(name, buffer, strlen(buffer) + 1);
658
659	sysfs_attr_init(&counter_attrs[i].attr);
660	counter_attrs[i].attr.name = name;
661	counter_attrs[i].attr.mode = 0644;
662	counter_attrs[i].show = counter_show;
663	counter_attrs[i].store = counter_set;
664
665	all_attrs[i] = &counter_attrs[i].attr;
666	}
667
668	interrupt_stats_attr_group.attrs = all_attrs;
669	if (!sysfs_create_group(acpi_kobj, &interrupt_stats_attr_group))
670	return;
671
672	fail:
673	delete_gpe_attr_array();
674	return;
675	}
676
677	static void __exit interrupt_stats_exit(void)
678	{
679	sysfs_remove_group(acpi_kobj, &interrupt_stats_attr_group);
680
681	delete_gpe_attr_array();
682
683	return;
684	}
685
686	int __init acpi_sysfs_init(void)
687	{
688	int result;
689
690	result = acpi_tables_sysfs_init();
691
692	return result;
693	}