[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 <asm/uaccess.h>

#include <acpi/acpi_drivers.h>

#define _COMPONENT		ACPI_SYSTEM_COMPONENT
ACPI_MODULE_NAME("system");
#ifdef MODULE_PARAM_PREFIX
#undef MODULE_PARAM_PREFIX
#endif
#define MODULE_PARAM_PREFIX "acpi."

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

u32 acpi_irq_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;

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;
	ssize_t ret_count = count;

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

	if (offset >= table_header->length) {
		ret_count = 0;
		goto end;
	}

	if (offset + ret_count > table_header->length)
		ret_count = table_header->length - offset;

	memcpy(buf, ((char *)table_header) + offset, ret_count);

      end:
	return ret_count;
}

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;

	memcpy(table_attr->name, table_header->signature, ACPI_NAME_SIZE);

	list_for_each_entry(attr, &acpi_table_attr_list, node) {
		if (!memcmp(table_header->signature, 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 + 4, "%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 = 0444;
	table_attr->attr.attr.owner = THIS_MODULE;

	return;
}

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)
		return -ENOMEM;

	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);

	return 0;
}

/*
 * 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_ERROR 2	/* other */
#define NUM_COUNTERS_EXTRA 3

static u32 *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 int count_num_gpes(void)
{
	int count = 0;
	struct acpi_gpe_xrupt_info *gpe_xrupt_info;
	struct acpi_gpe_block_info *gpe_block;
	acpi_cpu_flags flags;

	flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);

	gpe_xrupt_info = acpi_gbl_gpe_xrupt_list_head;
	while (gpe_xrupt_info) {
		gpe_block = gpe_xrupt_info->gpe_block_list_head;
		while (gpe_block) {
			count += gpe_block->register_count *
			    ACPI_GPE_REGISTER_WIDTH;
			gpe_block = gpe_block->next;
		}
		gpe_xrupt_info = gpe_xrupt_info->next;
	}
	acpi_os_release_lock(acpi_gbl_gpe_lock, flags);

	return count;
}

static void delete_gpe_attr_array(void)
{
	u32 *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]++;
	else
		all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR]++;

	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]++;
	else
		all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR]++;

	return;
}

static ssize_t counter_show(struct kobject *kobj,
	struct kobj_attribute *attr, char *buf)
{
	all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI] =
		acpi_irq_handled;
	all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE] =
		acpi_gpe_count;

	return sprintf(buf, "%d\n", all_counters[attr - counter_attrs]);
}

/*
 * counter_set() sets the specified counter.
 * setting the total "sci" file to any value clears all counters.
 */
static ssize_t counter_set(struct kobject *kobj,
	struct kobj_attribute *attr, const char *buf, size_t size)
{
	int index = attr - counter_attrs;

	if (index == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI) {
		int i;
		for (i = 0; i < num_counters; ++i)
			all_counters[i] = 0;
		acpi_gpe_count = 0;
		acpi_irq_handled = 0;

	} else
		all_counters[index] = strtoul(buf, NULL, 0);

	return size;
}

void acpi_irq_stats_init(void)
{
	int i;

	if (all_counters)
		return;

	num_gpes = count_num_gpes();
	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(u32) * (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[10];
		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_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;
	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 = {
	.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 = {
	.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 = {
	.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;
	char *name;

	/* 'info' [R] */
	name = ACPI_SYSTEM_FILE_INFO;
	entry = create_proc_entry(name, S_IRUGO, acpi_root_dir);
	if (!entry)
		goto Error;
	else {
		entry->proc_fops = &acpi_system_info_ops;
	}

	/* 'dsdt' [R] */
	name = ACPI_SYSTEM_FILE_DSDT;
	entry = create_proc_entry(name, S_IRUSR, acpi_root_dir);
	if (entry)
		entry->proc_fops = &acpi_system_dsdt_ops;
	else
		goto Error;

	/* 'fadt' [R] */
	name = ACPI_SYSTEM_FILE_FADT;
	entry = create_proc_entry(name, S_IRUSR, acpi_root_dir);
	if (entry)
		entry->proc_fops = &acpi_system_fadt_ops;
	else
		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

static int __init acpi_system_init(void)
{
	int result = 0;

	if (acpi_disabled)
		return 0;

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

	result = acpi_system_sysfs_init();

	return result;
}

subsys_initcall(acpi_system_init);
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>
	29	#include <asm/uaccess.h>
	30
	31	#include <acpi/acpi_drivers.h>
	32
1da177e4	33	#define _COMPONENT ACPI_SYSTEM_COMPONENT
f52fd66d	34	ACPI_MODULE_NAME("system");
5bb730fd ZR	35	#ifdef MODULE_PARAM_PREFIX
	36	#undef MODULE_PARAM_PREFIX
	37	#endif
	38	#define MODULE_PARAM_PREFIX "acpi."
	39
1da177e4	40	#define ACPI_SYSTEM_CLASS "system"
1da177e4	41	#define ACPI_SYSTEM_DEVICE_NAME "System"
1da177e4	42
5229e87d LB	43	u32 acpi_irq_handled;
5229e87d LB	44
5bb730fd ZR	45	/*
	46	* Make ACPICA version work as module param
	47	*/
d4c5f047 ZR	48	static int param_get_acpica_version(char buffer, struct kernel_param kp)
d4c5f047 ZR	49	{
5bb730fd ZR	50	int result;
	51
	52	result = sprintf(buffer, "%x", ACPI_CA_VERSION);
	53
	54	return result;
	55	}
	56
	57	module_param_call(acpica_version, NULL, param_get_acpica_version, NULL, 0444);
	58
d4c5f047 ZR	59	/* --------------------------------------------------------------------------
	60	FS Interface (/sys)
	61	-------------------------------------------------------------------------- */
	62	static LIST_HEAD(acpi_table_attr_list);
a77aa28a	63	static struct kobject *tables_kobj;
d4c5f047 ZR	64
	65	struct acpi_table_attr {
	66	struct bin_attribute attr;
	67	char name[8];
	68	int instance;
	69	struct list_head node;
	70	};
	71
	72	static ssize_t acpi_table_show(struct kobject *kobj,
	73	struct bin_attribute bin_attr, char buf,
	74	loff_t offset, size_t count)
	75	{
	76	struct acpi_table_attr *table_attr =
	77	container_of(bin_attr, struct acpi_table_attr, attr);
	78	struct acpi_table_header *table_header = NULL;
	79	acpi_status status;
	80	ssize_t ret_count = count;
	81
	82	status =
	83	acpi_get_table(table_attr->name, table_attr->instance,
	84	&table_header);
	85	if (ACPI_FAILURE(status))
	86	return -ENODEV;
	87
	88	if (offset >= table_header->length) {
	89	ret_count = 0;
	90	goto end;
	91	}
	92
	93	if (offset + ret_count > table_header->length)
	94	ret_count = table_header->length - offset;
	95
	96	memcpy(buf, ((char *)table_header) + offset, ret_count);
	97
	98	end:
	99	return ret_count;
	100	}
	101
	102	static void acpi_table_attr_init(struct acpi_table_attr *table_attr,
	103	struct acpi_table_header *table_header)
	104	{
	105	struct acpi_table_header *header = NULL;
	106	struct acpi_table_attr *attr = NULL;
	107
	108	memcpy(table_attr->name, table_header->signature, ACPI_NAME_SIZE);
	109
	110	list_for_each_entry(attr, &acpi_table_attr_list, node) {
	111	if (!memcmp(table_header->signature, attr->name,
	112	ACPI_NAME_SIZE))
	113	if (table_attr->instance < attr->instance)
	114	table_attr->instance = attr->instance;
	115	}
	116	table_attr->instance++;
	117
	118	if (table_attr->instance > 1 \|\| (table_attr->instance == 1 &&
	119	!acpi_get_table(table_header->
	120	signature, 2,
	121	&header)))
	122	sprintf(table_attr->name + 4, "%d", table_attr->instance);
	123
	124	table_attr->attr.size = 0;
	125	table_attr->attr.read = acpi_table_show;
	126	table_attr->attr.attr.name = table_attr->name;
	127	table_attr->attr.attr.mode = 0444;
128	table_attr->attr.attr.owner = THIS_MODULE;
129
130	return;
131	}
132
133	static int acpi_system_sysfs_init(void)
134	{
135	struct acpi_table_attr *table_attr;
136	struct acpi_table_header *table_header = NULL;
137	int table_index = 0;
138	int result;
139
a77aa28a GKH	140	tables_kobj = kobject_create_and_add("tables", acpi_kobj);
	141	if (!tables_kobj)
	142	return -ENOMEM;
d4c5f047 ZR	143
	144	do {
	145	result = acpi_get_table_by_index(table_index, &table_header);
	146	if (!result) {
	147	table_index++;
	148	table_attr = NULL;
	149	table_attr =
	150	kzalloc(sizeof(struct acpi_table_attr), GFP_KERNEL);
	151	if (!table_attr)
	152	return -ENOMEM;
	153
	154	acpi_table_attr_init(table_attr, table_header);
	155	result =
a77aa28a	156	sysfs_create_bin_file(tables_kobj,
d4c5f047 ZR	157	&table_attr->attr);
	158	if (result) {
	159	kfree(table_attr);
	160	return result;
	161	} else
	162	list_add_tail(&table_attr->node,
	163	&acpi_table_attr_list);
	164	}
	165	} while (!result);
a77aa28a	166	kobject_uevent(tables_kobj, KOBJ_ADD);
d4c5f047 ZR	167
	168	return 0;
	169	}
	170
5229e87d LB	171	/*
	172	* Detailed ACPI IRQ counters in /sys/firmware/acpi/interrupts/
	173	* See Documentation/ABI/testing/sysfs-firmware-acpi
	174	*/
	175
	176	#define COUNT_GPE 0
	177	#define COUNT_SCI 1 /* acpi_irq_handled */
	178	#define COUNT_ERROR 2 /* other */
	179	#define NUM_COUNTERS_EXTRA 3
	180
	181	static u32 *all_counters;
	182	static u32 num_gpes;
	183	static u32 num_counters;
	184	static struct attribute **all_attrs;
	185	static u32 acpi_gpe_count;
	186
	187	static struct attribute_group interrupt_stats_attr_group = {
	188	.name = "interrupts",
	189	};
	190	static struct kobj_attribute *counter_attrs;
	191
	192	static int count_num_gpes(void)
	193	{
	194	int count = 0;
	195	struct acpi_gpe_xrupt_info *gpe_xrupt_info;
	196	struct acpi_gpe_block_info *gpe_block;
	197	acpi_cpu_flags flags;
	198
	199	flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
	200
	201	gpe_xrupt_info = acpi_gbl_gpe_xrupt_list_head;
	202	while (gpe_xrupt_info) {
	203	gpe_block = gpe_xrupt_info->gpe_block_list_head;
	204	while (gpe_block) {
	205	count += gpe_block->register_count *
	206	ACPI_GPE_REGISTER_WIDTH;
	207	gpe_block = gpe_block->next;
	208	}
	209	gpe_xrupt_info = gpe_xrupt_info->next;
	210	}
	211	acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
	212
	213	return count;
	214	}
	215
	216	static void delete_gpe_attr_array(void)
	217	{
	218	u32 *tmp = all_counters;
	219
	220	all_counters = NULL;
	221	kfree(tmp);
	222
	223	if (counter_attrs) {
	224	int i;
	225
	226	for (i = 0; i < num_gpes; i++)
	227	kfree(counter_attrs[i].attr.name);
	228
	229	kfree(counter_attrs);
	230	}
	231	kfree(all_attrs);
	232
	233	return;
	234	}
235
236	void acpi_os_gpe_count(u32 gpe_number)
237	{
238	acpi_gpe_count++;
239
240	if (!all_counters)
241	return;
242
243	if (gpe_number < num_gpes)
244	all_counters[gpe_number]++;
245	else
246	all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR]++;
247
248	return;
249	}
250
251	void acpi_os_fixed_event_count(u32 event_number)
252	{
253	if (!all_counters)
254	return;
255
256	if (event_number < ACPI_NUM_FIXED_EVENTS)
257	all_counters[num_gpes + event_number]++;
258	else
259	all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR]++;
260
261	return;
262	}
263
264	static ssize_t counter_show(struct kobject *kobj,
265	struct kobj_attribute attr, char buf)
266	{
267	all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI] =
268	acpi_irq_handled;
269	all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE] =
270	acpi_gpe_count;
271
272	return sprintf(buf, "%d\n", all_counters[attr - counter_attrs]);
273	}
274
275	/*
276	* counter_set() sets the specified counter.
277	* setting the total "sci" file to any value clears all counters.
278	*/
279	static ssize_t counter_set(struct kobject *kobj,
280	struct kobj_attribute attr, const char buf, size_t size)
281	{
282	int index = attr - counter_attrs;
283
284	if (index == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI) {
285	int i;
286	for (i = 0; i < num_counters; ++i)
287	all_counters[i] = 0;
288	acpi_gpe_count = 0;
289	acpi_irq_handled = 0;
290
291	} else
292	all_counters[index] = strtoul(buf, NULL, 0);
293
294	return size;
295	}
296
297	void acpi_irq_stats_init(void)
298	{
299	int i;
300
301	if (all_counters)
302	return;
303
304	num_gpes = count_num_gpes();
305	num_counters = num_gpes + ACPI_NUM_FIXED_EVENTS + NUM_COUNTERS_EXTRA;
306
307	all_attrs = kzalloc(sizeof(struct attribute ) (num_counters + 1),
308	GFP_KERNEL);
309	if (all_attrs == NULL)
310	return;
311
312	all_counters = kzalloc(sizeof(u32) * (num_counters), GFP_KERNEL);
313	if (all_counters == NULL)
314	goto fail;
315
316	counter_attrs = kzalloc(sizeof(struct kobj_attribute) * (num_counters),
317	GFP_KERNEL);
318	if (counter_attrs == NULL)
319	goto fail;
320
321	for (i = 0; i < num_counters; ++i) {
322	char buffer[10];
323	char *name;
324
325	if (i < num_gpes)
326	sprintf(buffer, "gpe%02X", i);
327	else if (i == num_gpes + ACPI_EVENT_PMTIMER)
328	sprintf(buffer, "ff_pmtimer");
329	else if (i == num_gpes + ACPI_EVENT_GLOBAL)
330	sprintf(buffer, "ff_gbl_lock");
331	else if (i == num_gpes + ACPI_EVENT_POWER_BUTTON)
332	sprintf(buffer, "ff_pwr_btn");
333	else if (i == num_gpes + ACPI_EVENT_SLEEP_BUTTON)
334	sprintf(buffer, "ff_slp_btn");
335	else if (i == num_gpes + ACPI_EVENT_RTC)
336	sprintf(buffer, "ff_rt_clk");
337	else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE)
338	sprintf(buffer, "gpe_all");
339	else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI)
340	sprintf(buffer, "sci");
341	else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR)
342	sprintf(buffer, "error");
343	else
344	sprintf(buffer, "bug%02X", i);
345
346	name = kzalloc(strlen(buffer) + 1, GFP_KERNEL);
347	if (name == NULL)
348	goto fail;
349	strncpy(name, buffer, strlen(buffer) + 1);
350
351	counter_attrs[i].attr.name = name;
352	counter_attrs[i].attr.mode = 0644;
353	counter_attrs[i].show = counter_show;
354	counter_attrs[i].store = counter_set;
355
356	all_attrs[i] = &counter_attrs[i].attr;
357	}
358
359	interrupt_stats_attr_group.attrs = all_attrs;
360	sysfs_create_group(acpi_kobj, &interrupt_stats_attr_group);
361	return;
362
363	fail:
364	delete_gpe_attr_array();
365	return;
366	}
367
368	static void __exit interrupt_stats_exit(void)
369	{
370	sysfs_remove_group(acpi_kobj, &interrupt_stats_attr_group);
371
372	delete_gpe_attr_array();
373
374	return;
375	}
376
1da177e4 LT	377	/* --------------------------------------------------------------------------
	378	FS Interface (/proc)
	379	-------------------------------------------------------------------------- */
5bb730fd	380	#ifdef CONFIG_ACPI_PROCFS
d4c5f047 ZR	381	#define ACPI_SYSTEM_FILE_INFO "info"
	382	#define ACPI_SYSTEM_FILE_EVENT "event"
	383	#define ACPI_SYSTEM_FILE_DSDT "dsdt"
	384	#define ACPI_SYSTEM_FILE_FADT "fadt"
1da177e4	385
4be44fcd	386	static int acpi_system_read_info(struct seq_file seq, void offset)
1da177e4	387	{
1da177e4 LT	388
1da177e4 LT	389	seq_printf(seq, "version: %x\n", ACPI_CA_VERSION);
d550d98d	390	return 0;
1da177e4 LT	391	}
	392
	393	static int acpi_system_info_open_fs(struct inode inode, struct file file)
	394	{
	395	return single_open(file, acpi_system_read_info, PDE(inode)->data);
	396	}
	397
d7508032	398	static const struct file_operations acpi_system_info_ops = {
4be44fcd LB	399	.open = acpi_system_info_open_fs,
	400	.read = seq_read,
	401	.llseek = seq_lseek,
	402	.release = single_release,
1da177e4 LT	403	};
1da177e4 LT	404
4be44fcd LB	405	static ssize_t acpi_system_read_dsdt(struct file , char __user , size_t,
4be44fcd LB	406	loff_t *);
1da177e4	407
d7508032	408	static const struct file_operations acpi_system_dsdt_ops = {
4be44fcd	409	.read = acpi_system_read_dsdt,
1da177e4 LT	410	};
	411
	412	static ssize_t
4be44fcd LB	413	acpi_system_read_dsdt(struct file *file,
4be44fcd LB	414	char __user * buffer, size_t count, loff_t * ppos)
1da177e4	415	{
4be44fcd	416	acpi_status status = AE_OK;
ad71860a	417	struct acpi_table_header *dsdt = NULL;
4be44fcd	418	ssize_t res;
1da177e4	419
ad71860a	420	status = acpi_get_table(ACPI_SIG_DSDT, 1, &dsdt);
1da177e4	421	if (ACPI_FAILURE(status))
d550d98d	422	return -ENODEV;
1da177e4	423
d4c5f047	424	res = simple_read_from_buffer(buffer, count, ppos, dsdt, dsdt->length);
1da177e4	425
d550d98d	426	return res;
1da177e4 LT	427	}
1da177e4 LT	428
4be44fcd LB	429	static ssize_t acpi_system_read_fadt(struct file , char __user , size_t,
4be44fcd LB	430	loff_t *);
1da177e4	431
d7508032	432	static const struct file_operations acpi_system_fadt_ops = {
4be44fcd	433	.read = acpi_system_read_fadt,
1da177e4 LT	434	};
	435
	436	static ssize_t
4be44fcd LB	437	acpi_system_read_fadt(struct file *file,
4be44fcd LB	438	char __user * buffer, size_t count, loff_t * ppos)
1da177e4	439	{
4be44fcd	440	acpi_status status = AE_OK;
ad71860a	441	struct acpi_table_header *fadt = NULL;
4be44fcd	442	ssize_t res;
1da177e4	443
ad71860a	444	status = acpi_get_table(ACPI_SIG_FADT, 1, &fadt);
1da177e4	445	if (ACPI_FAILURE(status))
d550d98d	446	return -ENODEV;
1da177e4	447
d4c5f047	448	res = simple_read_from_buffer(buffer, count, ppos, fadt, fadt->length);
1da177e4	449
d550d98d	450	return res;
1da177e4 LT	451	}
1da177e4 LT	452
d4c5f047	453	static int acpi_system_procfs_init(void)
1da177e4	454	{
4be44fcd	455	struct proc_dir_entry *entry;
1da177e4	456	int error = 0;
4be44fcd	457	char *name;
1da177e4	458
1da177e4 LT	459	/* 'info' [R] */
1da177e4 LT	460	name = ACPI_SYSTEM_FILE_INFO;
4be44fcd	461	entry = create_proc_entry(name, S_IRUGO, acpi_root_dir);
1da177e4 LT	462	if (!entry)
	463	goto Error;
	464	else {
	465	entry->proc_fops = &acpi_system_info_ops;
	466	}
	467
	468	/* 'dsdt' [R] */
	469	name = ACPI_SYSTEM_FILE_DSDT;
	470	entry = create_proc_entry(name, S_IRUSR, acpi_root_dir);
	471	if (entry)
	472	entry->proc_fops = &acpi_system_dsdt_ops;
4be44fcd	473	else
1da177e4 LT	474	goto Error;
	475
	476	/* 'fadt' [R] */
	477	name = ACPI_SYSTEM_FILE_FADT;
	478	entry = create_proc_entry(name, S_IRUSR, acpi_root_dir);
	479	if (entry)
	480	entry->proc_fops = &acpi_system_fadt_ops;
	481	else
	482	goto Error;
	483
4be44fcd	484	Done:
d550d98d	485	return error;
1da177e4	486
4be44fcd	487	Error:
1da177e4 LT	488	remove_proc_entry(ACPI_SYSTEM_FILE_FADT, acpi_root_dir);
	489	remove_proc_entry(ACPI_SYSTEM_FILE_DSDT, acpi_root_dir);
	490	remove_proc_entry(ACPI_SYSTEM_FILE_INFO, acpi_root_dir);
	491
	492	error = -EFAULT;
	493	goto Done;
	494	}
d4c5f047 ZR	495	#else
	496	static int acpi_system_procfs_init(void)
	497	{
	498	return 0;
	499	}
	500	#endif
	501
	502	static int __init acpi_system_init(void)
	503	{
	504	int result = 0;
	505
	506	if (acpi_disabled)
	507	return 0;
	508
	509	result = acpi_system_procfs_init();
	510	if (result)
	511	return result;
	512
	513	result = acpi_system_sysfs_init();
	514
	515	return result;
	516	}
1da177e4	517
1da177e4	518	subsys_initcall(acpi_system_init);