[net-next-2.6.git] / drivers / acpi / system.c

/*
 *  acpi_system.c - ACPI System Driver ($Revision: 63 $)
 *
 *  Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
 *  Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or (at
 *  your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful, but
 *  WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License along
 *  with this program; if not, write to the Free Software Foundation, Inc.,
 *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 */

#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/init.h>
#include <linux/string.h>
#include <asm/uaccess.h>

#include <acpi/acpi_drivers.h>

#define _COMPONENT		ACPI_SYSTEM_COMPONENT
ACPI_MODULE_NAME("system");

#define ACPI_SYSTEM_CLASS		"system"
#define ACPI_SYSTEM_DEVICE_NAME		"System"

u32 acpi_irq_handled;
u32 acpi_irq_not_handled;

/*
 * Make ACPICA version work as module param
 */
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);

/* --------------------------------------------------------------------------
                              FS Interface (/sys)
   -------------------------------------------------------------------------- */
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 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;

	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_system_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 in /sys/firmware/acpi/interrupts/
 * See Documentation/ABI/testing/sysfs-firmware-acpi
 */

#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,
						ACPI_NOT_ISR, 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, ACPI_NOT_ISR);
		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);

		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;
}

/* --------------------------------------------------------------------------
                              FS Interface (/proc)
   -------------------------------------------------------------------------- */
#ifdef CONFIG_ACPI_PROCFS
#define ACPI_SYSTEM_FILE_INFO		"info"
#define ACPI_SYSTEM_FILE_EVENT		"event"
#define ACPI_SYSTEM_FILE_DSDT		"dsdt"
#define ACPI_SYSTEM_FILE_FADT		"fadt"

static int acpi_system_read_info(struct seq_file *seq, void *offset)
{

	seq_printf(seq, "version:                 %x\n", ACPI_CA_VERSION);
	return 0;
}

static int acpi_system_info_open_fs(struct inode *inode, struct file *file)
{
	return single_open(file, acpi_system_read_info, PDE(inode)->data);
}

static const struct file_operations acpi_system_info_ops = {
	.owner = THIS_MODULE,
	.open = acpi_system_info_open_fs,
	.read = seq_read,
	.llseek = seq_lseek,
	.release = single_release,
};

static ssize_t acpi_system_read_dsdt(struct file *, char __user *, size_t,
				     loff_t *);

static const struct file_operations acpi_system_dsdt_ops = {
	.owner = THIS_MODULE,
	.read = acpi_system_read_dsdt,
};

static ssize_t
acpi_system_read_dsdt(struct file *file,
		      char __user * buffer, size_t count, loff_t * ppos)
{
	acpi_status status = AE_OK;
	struct acpi_table_header *dsdt = NULL;
	ssize_t res;

	status = acpi_get_table(ACPI_SIG_DSDT, 1, &dsdt);
	if (ACPI_FAILURE(status))
		return -ENODEV;

	res = simple_read_from_buffer(buffer, count, ppos, dsdt, dsdt->length);

	return res;
}

static ssize_t acpi_system_read_fadt(struct file *, char __user *, size_t,
				     loff_t *);

static const struct file_operations acpi_system_fadt_ops = {
	.owner = THIS_MODULE,
	.read = acpi_system_read_fadt,
};

static ssize_t
acpi_system_read_fadt(struct file *file,
		      char __user * buffer, size_t count, loff_t * ppos)
{
	acpi_status status = AE_OK;
	struct acpi_table_header *fadt = NULL;
	ssize_t res;

	status = acpi_get_table(ACPI_SIG_FADT, 1, &fadt);
	if (ACPI_FAILURE(status))
		return -ENODEV;

	res = simple_read_from_buffer(buffer, count, ppos, fadt, fadt->length);

	return res;
}

static int acpi_system_procfs_init(void)
{
	struct proc_dir_entry *entry;
	int error = 0;

	/* 'info' [R] */
	entry = proc_create(ACPI_SYSTEM_FILE_INFO, S_IRUGO, acpi_root_dir,
			    &acpi_system_info_ops);
	if (!entry)
		goto Error;

	/* 'dsdt' [R] */
	entry = proc_create(ACPI_SYSTEM_FILE_DSDT, S_IRUSR, acpi_root_dir,
			    &acpi_system_dsdt_ops);
	if (!entry)
		goto Error;

	/* 'fadt' [R] */
	entry = proc_create(ACPI_SYSTEM_FILE_FADT, S_IRUSR, acpi_root_dir,
			    &acpi_system_fadt_ops);
	if (!entry)
		goto Error;

      Done:
	return error;

      Error:
	remove_proc_entry(ACPI_SYSTEM_FILE_FADT, acpi_root_dir);
	remove_proc_entry(ACPI_SYSTEM_FILE_DSDT, acpi_root_dir);
	remove_proc_entry(ACPI_SYSTEM_FILE_INFO, acpi_root_dir);

	error = -EFAULT;
	goto Done;
}
#else
static int acpi_system_procfs_init(void)
{
	return 0;
}
#endif

int __init acpi_system_init(void)
{
	int result;

	result = acpi_system_procfs_init();
	if (result)
		return result;

	result = acpi_system_sysfs_init();

	return result;
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* acpi_system.c - ACPI System Driver ($Revision: 63 $)
	3	*
	4	* Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
	5	* Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
	6	*
	7	* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	8	*
	9	* This program is free software; you can redistribute it and/or modify
	10	* it under the terms of the GNU General Public License as published by
	11	* the Free Software Foundation; either version 2 of the License, or (at
	12	* your option) any later version.
	13	*
	14	* This program is distributed in the hope that it will be useful, but
	15	* WITHOUT ANY WARRANTY; without even the implied warranty of
	16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	17	* General Public License for more details.
	18	*
	19	* You should have received a copy of the GNU General Public License along
	20	* with this program; if not, write to the Free Software Foundation, Inc.,
	21	* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
	22	*
	23	* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	24	*/
	25
	26	#include <linux/proc_fs.h>
	27	#include <linux/seq_file.h>
	28	#include <linux/init.h>
e108526e	29	#include <linux/string.h>
1da177e4 LT	30	#include <asm/uaccess.h>
	31
	32	#include <acpi/acpi_drivers.h>
	33
1da177e4	34	#define _COMPONENT ACPI_SYSTEM_COMPONENT
f52fd66d	35	ACPI_MODULE_NAME("system");
5bb730fd	36
1da177e4	37	#define ACPI_SYSTEM_CLASS "system"
1da177e4	38	#define ACPI_SYSTEM_DEVICE_NAME "System"
1da177e4	39
5229e87d	40	u32 acpi_irq_handled;
88bea188	41	u32 acpi_irq_not_handled;
5229e87d	42
5bb730fd ZR	43	/*
	44	* Make ACPICA version work as module param
	45	*/
d4c5f047 ZR	46	static int param_get_acpica_version(char buffer, struct kernel_param kp)
d4c5f047 ZR	47	{
5bb730fd ZR	48	int result;
	49
	50	result = sprintf(buffer, "%x", ACPI_CA_VERSION);
	51
	52	return result;
	53	}
	54
	55	module_param_call(acpica_version, NULL, param_get_acpica_version, NULL, 0444);
	56
d4c5f047 ZR	57	/* --------------------------------------------------------------------------
	58	FS Interface (/sys)
	59	-------------------------------------------------------------------------- */
	60	static LIST_HEAD(acpi_table_attr_list);
a77aa28a	61	static struct kobject *tables_kobj;
4658e4ef	62	static struct kobject *dynamic_tables_kobj;
d4c5f047 ZR	63
	64	struct acpi_table_attr {
	65	struct bin_attribute attr;
	66	char name[8];
	67	int instance;
	68	struct list_head node;
	69	};
	70
	71	static ssize_t acpi_table_show(struct kobject *kobj,
	72	struct bin_attribute bin_attr, char buf,
	73	loff_t offset, size_t count)
	74	{
	75	struct acpi_table_attr *table_attr =
	76	container_of(bin_attr, struct acpi_table_attr, attr);
	77	struct acpi_table_header *table_header = NULL;
	78	acpi_status status;
4feba70a PG	79	char name[ACPI_NAME_SIZE];
	80
	81	if (strncmp(table_attr->name, "NULL", 4))
	82	memcpy(name, table_attr->name, ACPI_NAME_SIZE);
	83	else
	84	memcpy(name, "\0\0\0\0", 4);
d4c5f047 ZR	85
d4c5f047 ZR	86	status =
4feba70a	87	acpi_get_table(name, table_attr->instance,
d4c5f047 ZR	88	&table_header);
	89	if (ACPI_FAILURE(status))
	90	return -ENODEV;
	91
46a21e46 AM	92	return memory_read_from_buffer(buf, count, &offset,
46a21e46 AM	93	table_header, table_header->length);
d4c5f047 ZR	94	}
	95
	96	static void acpi_table_attr_init(struct acpi_table_attr *table_attr,
	97	struct acpi_table_header *table_header)
	98	{
	99	struct acpi_table_header *header = NULL;
	100	struct acpi_table_attr *attr = NULL;
	101
4feba70a PG	102	if (table_header->signature[0] != '\0')
	103	memcpy(table_attr->name, table_header->signature,
	104	ACPI_NAME_SIZE);
	105	else
	106	memcpy(table_attr->name, "NULL", 4);
d4c5f047 ZR	107
d4c5f047 ZR	108	list_for_each_entry(attr, &acpi_table_attr_list, node) {
4feba70a	109	if (!memcmp(table_attr->name, attr->name, ACPI_NAME_SIZE))
d4c5f047 ZR	110	if (table_attr->instance < attr->instance)
	111	table_attr->instance = attr->instance;
	112	}
	113	table_attr->instance++;
	114
	115	if (table_attr->instance > 1 \|\| (table_attr->instance == 1 &&
4feba70a PG	116	!acpi_get_table
	117	(table_header->signature, 2, &header)))
	118	sprintf(table_attr->name + ACPI_NAME_SIZE, "%d",
	119	table_attr->instance);
d4c5f047 ZR	120
	121	table_attr->attr.size = 0;
	122	table_attr->attr.read = acpi_table_show;
	123	table_attr->attr.attr.name = table_attr->name;
d0006f32	124	table_attr->attr.attr.mode = 0400;
d4c5f047 ZR	125
	126	return;
	127	}
	128
4658e4ef ZR	129	static acpi_status
	130	acpi_sysfs_table_handler(u32 event, void table, void context)
	131	{
	132	struct acpi_table_attr *table_attr;
	133
	134	switch (event) {
	135	case ACPI_TABLE_EVENT_LOAD:
	136	table_attr =
	137	kzalloc(sizeof(struct acpi_table_attr), GFP_KERNEL);
	138	if (!table_attr)
	139	return AE_NO_MEMORY;
	140
	141	acpi_table_attr_init(table_attr, table);
	142	if (sysfs_create_bin_file(dynamic_tables_kobj,
	143	&table_attr->attr)) {
	144	kfree(table_attr);
	145	return AE_ERROR;
	146	} else
	147	list_add_tail(&table_attr->node,
	148	&acpi_table_attr_list);
	149	break;
	150	case ACPI_TABLE_EVENT_UNLOAD:
	151	/*
	152	* we do not need to do anything right now
	153	* because the table is not deleted from the
	154	* global table list when unloading it.
	155	*/
	156	break;
	157	default:
	158	return AE_BAD_PARAMETER;
	159	}
	160	return AE_OK;
	161	}
	162
d4c5f047 ZR	163	static int acpi_system_sysfs_init(void)
	164	{
	165	struct acpi_table_attr *table_attr;
	166	struct acpi_table_header *table_header = NULL;
	167	int table_index = 0;
	168	int result;
	169
a77aa28a GKH	170	tables_kobj = kobject_create_and_add("tables", acpi_kobj);
a77aa28a GKH	171	if (!tables_kobj)
4658e4ef ZR	172	goto err;
	173
	174	dynamic_tables_kobj = kobject_create_and_add("dynamic", tables_kobj);
	175	if (!dynamic_tables_kobj)
	176	goto err_dynamic_tables;
d4c5f047 ZR	177
	178	do {
	179	result = acpi_get_table_by_index(table_index, &table_header);
	180	if (!result) {
	181	table_index++;
	182	table_attr = NULL;
	183	table_attr =
	184	kzalloc(sizeof(struct acpi_table_attr), GFP_KERNEL);
	185	if (!table_attr)
	186	return -ENOMEM;
	187
	188	acpi_table_attr_init(table_attr, table_header);
	189	result =
a77aa28a	190	sysfs_create_bin_file(tables_kobj,
d4c5f047 ZR	191	&table_attr->attr);
	192	if (result) {
	193	kfree(table_attr);
	194	return result;
	195	} else
	196	list_add_tail(&table_attr->node,
	197	&acpi_table_attr_list);
	198	}
	199	} while (!result);
a77aa28a	200	kobject_uevent(tables_kobj, KOBJ_ADD);
4658e4ef ZR	201	kobject_uevent(dynamic_tables_kobj, KOBJ_ADD);
	202	result = acpi_install_table_handler(acpi_sysfs_table_handler, NULL);
	203
	204	return result == AE_OK ? 0 : -EINVAL;
	205	err_dynamic_tables:
	206	kobject_put(tables_kobj);
	207	err:
	208	return -ENOMEM;
d4c5f047 ZR	209	}
d4c5f047 ZR	210
5229e87d LB	211	/*
	212	* Detailed ACPI IRQ counters in /sys/firmware/acpi/interrupts/
	213	* See Documentation/ABI/testing/sysfs-firmware-acpi
	214	*/
	215
	216	#define COUNT_GPE 0
	217	#define COUNT_SCI 1 /* acpi_irq_handled */
88bea188 LB	218	#define COUNT_SCI_NOT 2 /* acpi_irq_not_handled */
	219	#define COUNT_ERROR 3 /* other */
	220	#define NUM_COUNTERS_EXTRA 4
5229e87d	221
71b58cbb ZR	222	struct event_counter {
	223	u32 count;
	224	u32 flags;
	225	};
	226
	227	static struct event_counter *all_counters;
5229e87d LB	228	static u32 num_gpes;
	229	static u32 num_counters;
	230	static struct attribute **all_attrs;
	231	static u32 acpi_gpe_count;
	232
	233	static struct attribute_group interrupt_stats_attr_group = {
	234	.name = "interrupts",
	235	};
	236	static struct kobj_attribute *counter_attrs;
	237
5229e87d LB	238	static void delete_gpe_attr_array(void)
5229e87d LB	239	{
71b58cbb	240	struct event_counter *tmp = all_counters;
5229e87d LB	241
	242	all_counters = NULL;
	243	kfree(tmp);
	244
	245	if (counter_attrs) {
	246	int i;
	247
	248	for (i = 0; i < num_gpes; i++)
	249	kfree(counter_attrs[i].attr.name);
	250
	251	kfree(counter_attrs);
	252	}
	253	kfree(all_attrs);
	254
	255	return;
	256	}
	257
	258	void acpi_os_gpe_count(u32 gpe_number)
	259	{
	260	acpi_gpe_count++;
	261
	262	if (!all_counters)
	263	return;
	264
	265	if (gpe_number < num_gpes)
71b58cbb	266	all_counters[gpe_number].count++;
5229e87d	267	else
71b58cbb ZR	268	all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR].
71b58cbb ZR	269	count++;
5229e87d LB	270
	271	return;
	272	}
	273
	274	void acpi_os_fixed_event_count(u32 event_number)
	275	{
	276	if (!all_counters)
	277	return;
	278
	279	if (event_number < ACPI_NUM_FIXED_EVENTS)
71b58cbb	280	all_counters[num_gpes + event_number].count++;
5229e87d	281	else
71b58cbb ZR	282	all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR].
71b58cbb ZR	283	count++;
5229e87d LB	284
	285	return;
	286	}
	287
71b58cbb ZR	288	static int get_status(u32 index, acpi_event_status status, acpi_handle handle)
	289	{
	290	int result = 0;
	291
	292	if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS)
	293	goto end;
	294
	295	if (index < num_gpes) {
e97d6bf1	296	result = acpi_get_gpe_device(index, handle);
71b58cbb ZR	297	if (result) {
	298	ACPI_EXCEPTION((AE_INFO, AE_NOT_FOUND,
	299	"Invalid GPE 0x%x\n", index));
	300	goto end;
	301	}
	302	result = acpi_get_gpe_status(*handle, index,
	303	ACPI_NOT_ISR, status);
	304	} else if (index < (num_gpes + ACPI_NUM_FIXED_EVENTS))
	305	result = acpi_get_event_status(index - num_gpes, status);
	306
71b58cbb ZR	307	end:
	308	return result;
	309	}
	310
5229e87d LB	311	static ssize_t counter_show(struct kobject *kobj,
	312	struct kobj_attribute attr, char buf)
	313	{
71b58cbb ZR	314	int index = attr - counter_attrs;
	315	int size;
	316	acpi_handle handle;
	317	acpi_event_status status;
	318	int result = 0;
	319
	320	all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI].count =
5229e87d	321	acpi_irq_handled;
88bea188 LB	322	all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI_NOT].count =
88bea188 LB	323	acpi_irq_not_handled;
71b58cbb	324	all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE].count =
5229e87d LB	325	acpi_gpe_count;
5229e87d LB	326
71b58cbb ZR	327	size = sprintf(buf, "%8d", all_counters[index].count);
	328
	329	/* "gpe_all" or "sci" */
	330	if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS)
	331	goto end;
	332
	333	result = get_status(index, &status, &handle);
	334	if (result)
	335	goto end;
	336
ed206fac ZR	337	if (!(status & ACPI_EVENT_FLAG_HANDLE))
ed206fac ZR	338	size += sprintf(buf + size, " invalid");
71b58cbb	339	else if (status & ACPI_EVENT_FLAG_ENABLED)
ed206fac ZR	340	size += sprintf(buf + size, " enabled");
	341	else if (status & ACPI_EVENT_FLAG_WAKE_ENABLED)
	342	size += sprintf(buf + size, " wake_enabled");
71b58cbb	343	else
ed206fac	344	size += sprintf(buf + size, " disabled");
71b58cbb ZR	345
	346	end:
	347	size += sprintf(buf + size, "\n");
	348	return result ? result : size;
5229e87d LB	349	}
	350
	351	/*
	352	* counter_set() sets the specified counter.
	353	* setting the total "sci" file to any value clears all counters.
71b58cbb	354	* enable/disable/clear a gpe/fixed event in user space.
5229e87d LB	355	*/
	356	static ssize_t counter_set(struct kobject *kobj,
	357	struct kobj_attribute attr, const char buf, size_t size)
	358	{
	359	int index = attr - counter_attrs;
71b58cbb ZR	360	acpi_event_status status;
	361	acpi_handle handle;
	362	int result = 0;
5229e87d LB	363
	364	if (index == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI) {
	365	int i;
	366	for (i = 0; i < num_counters; ++i)
71b58cbb	367	all_counters[i].count = 0;
5229e87d LB	368	acpi_gpe_count = 0;
5229e87d LB	369	acpi_irq_handled = 0;
88bea188	370	acpi_irq_not_handled = 0;
71b58cbb ZR	371	goto end;
	372	}
	373
	374	/* show the event status for both GPEs and Fixed Events */
	375	result = get_status(index, &status, &handle);
	376	if (result)
	377	goto end;
	378
ed206fac	379	if (!(status & ACPI_EVENT_FLAG_HANDLE)) {
55ac9a01 LM	380	printk(KERN_WARNING PREFIX
55ac9a01 LM	381	"Can not change Invalid GPE/Fixed Event status\n");
71b58cbb ZR	382	return -EINVAL;
71b58cbb ZR	383	}
5229e87d	384
71b58cbb ZR	385	if (index < num_gpes) {
	386	if (!strcmp(buf, "disable\n") &&
	387	(status & ACPI_EVENT_FLAG_ENABLED))
0b7084ac	388	result = acpi_disable_gpe(handle, index);
71b58cbb ZR	389	else if (!strcmp(buf, "enable\n") &&
71b58cbb ZR	390	!(status & ACPI_EVENT_FLAG_ENABLED))
0b7084ac	391	result = acpi_enable_gpe(handle, index);
71b58cbb ZR	392	else if (!strcmp(buf, "clear\n") &&
	393	(status & ACPI_EVENT_FLAG_SET))
	394	result = acpi_clear_gpe(handle, index, ACPI_NOT_ISR);
	395	else
	396	all_counters[index].count = strtoul(buf, NULL, 0);
	397	} else if (index < num_gpes + ACPI_NUM_FIXED_EVENTS) {
	398	int event = index - num_gpes;
	399	if (!strcmp(buf, "disable\n") &&
	400	(status & ACPI_EVENT_FLAG_ENABLED))
	401	result = acpi_disable_event(event, ACPI_NOT_ISR);
	402	else if (!strcmp(buf, "enable\n") &&
	403	!(status & ACPI_EVENT_FLAG_ENABLED))
	404	result = acpi_enable_event(event, ACPI_NOT_ISR);
	405	else if (!strcmp(buf, "clear\n") &&
	406	(status & ACPI_EVENT_FLAG_SET))
	407	result = acpi_clear_event(event);
	408	else
	409	all_counters[index].count = strtoul(buf, NULL, 0);
5229e87d	410	} else
71b58cbb	411	all_counters[index].count = strtoul(buf, NULL, 0);
5229e87d	412
71b58cbb ZR	413	if (ACPI_FAILURE(result))
	414	result = -EINVAL;
	415	end:
	416	return result ? result : size;
5229e87d LB	417	}
	418
	419	void acpi_irq_stats_init(void)
	420	{
	421	int i;
	422
	423	if (all_counters)
	424	return;
	425
e97d6bf1	426	num_gpes = acpi_current_gpe_count;
5229e87d LB	427	num_counters = num_gpes + ACPI_NUM_FIXED_EVENTS + NUM_COUNTERS_EXTRA;
	428
	429	all_attrs = kzalloc(sizeof(struct attribute ) (num_counters + 1),
	430	GFP_KERNEL);
	431	if (all_attrs == NULL)
	432	return;
	433
71b58cbb ZR	434	all_counters = kzalloc(sizeof(struct event_counter) * (num_counters),
71b58cbb ZR	435	GFP_KERNEL);
5229e87d LB	436	if (all_counters == NULL)
	437	goto fail;
	438
	439	counter_attrs = kzalloc(sizeof(struct kobj_attribute) * (num_counters),
	440	GFP_KERNEL);
	441	if (counter_attrs == NULL)
	442	goto fail;
	443
	444	for (i = 0; i < num_counters; ++i) {
c8dc9de1	445	char buffer[12];
5229e87d LB	446	char *name;
	447
	448	if (i < num_gpes)
	449	sprintf(buffer, "gpe%02X", i);
	450	else if (i == num_gpes + ACPI_EVENT_PMTIMER)
	451	sprintf(buffer, "ff_pmtimer");
	452	else if (i == num_gpes + ACPI_EVENT_GLOBAL)
	453	sprintf(buffer, "ff_gbl_lock");
	454	else if (i == num_gpes + ACPI_EVENT_POWER_BUTTON)
	455	sprintf(buffer, "ff_pwr_btn");
	456	else if (i == num_gpes + ACPI_EVENT_SLEEP_BUTTON)
	457	sprintf(buffer, "ff_slp_btn");
	458	else if (i == num_gpes + ACPI_EVENT_RTC)
	459	sprintf(buffer, "ff_rt_clk");
	460	else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE)
	461	sprintf(buffer, "gpe_all");
	462	else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI)
	463	sprintf(buffer, "sci");
88bea188 LB	464	else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI_NOT)
88bea188 LB	465	sprintf(buffer, "sci_not");
5229e87d LB	466	else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR)
	467	sprintf(buffer, "error");
	468	else
	469	sprintf(buffer, "bug%02X", i);
	470
	471	name = kzalloc(strlen(buffer) + 1, GFP_KERNEL);
	472	if (name == NULL)
	473	goto fail;
	474	strncpy(name, buffer, strlen(buffer) + 1);
	475
	476	counter_attrs[i].attr.name = name;
	477	counter_attrs[i].attr.mode = 0644;
	478	counter_attrs[i].show = counter_show;
	479	counter_attrs[i].store = counter_set;
	480
	481	all_attrs[i] = &counter_attrs[i].attr;
	482	}
	483
	484	interrupt_stats_attr_group.attrs = all_attrs;
b7143156 LB	485	if (!sysfs_create_group(acpi_kobj, &interrupt_stats_attr_group))
b7143156 LB	486	return;
5229e87d LB	487
	488	fail:
	489	delete_gpe_attr_array();
	490	return;
	491	}
	492
	493	static void __exit interrupt_stats_exit(void)
	494	{
	495	sysfs_remove_group(acpi_kobj, &interrupt_stats_attr_group);
	496
	497	delete_gpe_attr_array();
	498
	499	return;
	500	}
	501
1da177e4 LT	502	/* --------------------------------------------------------------------------
	503	FS Interface (/proc)
	504	-------------------------------------------------------------------------- */
5bb730fd	505	#ifdef CONFIG_ACPI_PROCFS
d4c5f047 ZR	506	#define ACPI_SYSTEM_FILE_INFO "info"
	507	#define ACPI_SYSTEM_FILE_EVENT "event"
	508	#define ACPI_SYSTEM_FILE_DSDT "dsdt"
	509	#define ACPI_SYSTEM_FILE_FADT "fadt"
1da177e4	510
4be44fcd	511	static int acpi_system_read_info(struct seq_file seq, void offset)
1da177e4	512	{
1da177e4 LT	513
1da177e4 LT	514	seq_printf(seq, "version: %x\n", ACPI_CA_VERSION);
d550d98d	515	return 0;
1da177e4 LT	516	}
	517
	518	static int acpi_system_info_open_fs(struct inode inode, struct file file)
	519	{
	520	return single_open(file, acpi_system_read_info, PDE(inode)->data);
	521	}
	522
d7508032	523	static const struct file_operations acpi_system_info_ops = {
cf7acfab	524	.owner = THIS_MODULE,
4be44fcd LB	525	.open = acpi_system_info_open_fs,
	526	.read = seq_read,
	527	.llseek = seq_lseek,
	528	.release = single_release,
1da177e4 LT	529	};
1da177e4 LT	530
4be44fcd LB	531	static ssize_t acpi_system_read_dsdt(struct file , char __user , size_t,
4be44fcd LB	532	loff_t *);
1da177e4	533
d7508032	534	static const struct file_operations acpi_system_dsdt_ops = {
cf7acfab	535	.owner = THIS_MODULE,
4be44fcd	536	.read = acpi_system_read_dsdt,
1da177e4 LT	537	};
	538
	539	static ssize_t
4be44fcd LB	540	acpi_system_read_dsdt(struct file *file,
4be44fcd LB	541	char __user * buffer, size_t count, loff_t * ppos)
1da177e4	542	{
4be44fcd	543	acpi_status status = AE_OK;
ad71860a	544	struct acpi_table_header *dsdt = NULL;
4be44fcd	545	ssize_t res;
1da177e4	546
ad71860a	547	status = acpi_get_table(ACPI_SIG_DSDT, 1, &dsdt);
1da177e4	548	if (ACPI_FAILURE(status))
d550d98d	549	return -ENODEV;
1da177e4	550
d4c5f047	551	res = simple_read_from_buffer(buffer, count, ppos, dsdt, dsdt->length);
1da177e4	552
d550d98d	553	return res;
1da177e4 LT	554	}
1da177e4 LT	555
4be44fcd LB	556	static ssize_t acpi_system_read_fadt(struct file , char __user , size_t,
4be44fcd LB	557	loff_t *);
1da177e4	558
d7508032	559	static const struct file_operations acpi_system_fadt_ops = {
cf7acfab	560	.owner = THIS_MODULE,
4be44fcd	561	.read = acpi_system_read_fadt,
1da177e4 LT	562	};
	563
	564	static ssize_t
4be44fcd LB	565	acpi_system_read_fadt(struct file *file,
4be44fcd LB	566	char __user * buffer, size_t count, loff_t * ppos)
1da177e4	567	{
4be44fcd	568	acpi_status status = AE_OK;
ad71860a	569	struct acpi_table_header *fadt = NULL;
4be44fcd	570	ssize_t res;
1da177e4	571
ad71860a	572	status = acpi_get_table(ACPI_SIG_FADT, 1, &fadt);
1da177e4	573	if (ACPI_FAILURE(status))
d550d98d	574	return -ENODEV;
1da177e4	575
d4c5f047	576	res = simple_read_from_buffer(buffer, count, ppos, fadt, fadt->length);
1da177e4	577
d550d98d	578	return res;
1da177e4 LT	579	}
1da177e4 LT	580
d4c5f047	581	static int acpi_system_procfs_init(void)
1da177e4	582	{
4be44fcd	583	struct proc_dir_entry *entry;
1da177e4	584	int error = 0;
1da177e4	585
1da177e4	586	/* 'info' [R] */
cf7acfab DL	587	entry = proc_create(ACPI_SYSTEM_FILE_INFO, S_IRUGO, acpi_root_dir,
cf7acfab DL	588	&acpi_system_info_ops);
1da177e4 LT	589	if (!entry)
1da177e4 LT	590	goto Error;
1da177e4 LT	591
1da177e4 LT	592	/* 'dsdt' [R] */
cf7acfab DL	593	entry = proc_create(ACPI_SYSTEM_FILE_DSDT, S_IRUSR, acpi_root_dir,
	594	&acpi_system_dsdt_ops);
	595	if (!entry)
1da177e4 LT	596	goto Error;
	597
	598	/* 'fadt' [R] */
cf7acfab DL	599	entry = proc_create(ACPI_SYSTEM_FILE_FADT, S_IRUSR, acpi_root_dir,
	600	&acpi_system_fadt_ops);
	601	if (!entry)
1da177e4 LT	602	goto Error;
1da177e4 LT	603
4be44fcd	604	Done:
d550d98d	605	return error;
1da177e4	606
4be44fcd	607	Error:
1da177e4 LT	608	remove_proc_entry(ACPI_SYSTEM_FILE_FADT, acpi_root_dir);
	609	remove_proc_entry(ACPI_SYSTEM_FILE_DSDT, acpi_root_dir);
	610	remove_proc_entry(ACPI_SYSTEM_FILE_INFO, acpi_root_dir);
	611
	612	error = -EFAULT;
	613	goto Done;
	614	}
d4c5f047 ZR	615	#else
	616	static int acpi_system_procfs_init(void)
	617	{
	618	return 0;
	619	}
	620	#endif
	621
141a0af3	622	int __init acpi_system_init(void)
d4c5f047	623	{
141a0af3	624	int result;
d4c5f047 ZR	625
	626	result = acpi_system_procfs_init();
	627	if (result)
	628	return result;
	629
	630	result = acpi_system_sysfs_init();
	631
	632	return result;
	633	}