[linux-2.6-block.git] / drivers / acpi / debug.c

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

#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/moduleparam.h>
#include <linux/debugfs.h>
#include <asm/uaccess.h>
#include <acpi/acpi_drivers.h>

#define _COMPONENT		ACPI_SYSTEM_COMPONENT
ACPI_MODULE_NAME("debug");

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),
};

/* --------------------------------------------------------------------------
                              FS Interface (/sys)
   -------------------------------------------------------------------------- */
static int param_get_debug_layer(char *buffer, 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, 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;
}

module_param_call(debug_layer, param_set_uint, param_get_debug_layer, &acpi_dbg_layer, 0644);
module_param_call(debug_level, param_set_uint, param_get_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);

/* --------------------------------------------------------------------------
				DebugFS Interface
   -------------------------------------------------------------------------- */

static ssize_t cm_write(struct file *file, const char __user *user_buf,
			size_t count, loff_t *ppos)
{
	static char *buf;
	static int uncopied_bytes;
	struct acpi_table_header table;
	acpi_status status;

	if (!(*ppos)) {
		/* parse the table header to get the table length */
		if (count <= sizeof(struct acpi_table_header))
			return -EINVAL;
		if (copy_from_user(&table, user_buf,
			sizeof(struct acpi_table_header)))
			return -EFAULT;
		uncopied_bytes = table.length;
		buf = kzalloc(uncopied_bytes, GFP_KERNEL);
		if (!buf)
			return -ENOMEM;
	}

	if (uncopied_bytes < count) {
		kfree(buf);
		return -EINVAL;
	}

	if (copy_from_user(buf + (*ppos), user_buf, count)) {
		kfree(buf);
		return -EFAULT;
	}

	uncopied_bytes -= count;
	*ppos += count;

	if (!uncopied_bytes) {
		status = acpi_install_method(buf);
		kfree(buf);
		if (ACPI_FAILURE(status))
			return -EINVAL;
		add_taint(TAINT_OVERRIDDEN_ACPI_TABLE);
	}

	return count;
}

static const struct file_operations cm_fops = {
	.write = cm_write,
};

static int acpi_debugfs_init(void)
{
	struct dentry *acpi_dir, *cm_dentry;

	acpi_dir = debugfs_create_dir("acpi", NULL);
	if (!acpi_dir)
		goto err;

	cm_dentry = debugfs_create_file("custom_method", S_IWUGO,
					acpi_dir, NULL, &cm_fops);
	if (!cm_dentry)
		goto err;

	return 0;

err:
	if (acpi_dir)
		debugfs_remove(acpi_dir);
	return -EINVAL;
}

/* --------------------------------------------------------------------------
                              FS Interface (/proc)
   -------------------------------------------------------------------------- */
#ifdef CONFIG_ACPI_PROCFS
#define ACPI_SYSTEM_FILE_DEBUG_LAYER	"debug_layer"
#define ACPI_SYSTEM_FILE_DEBUG_LEVEL		"debug_level"

static int acpi_system_debug_proc_show(struct seq_file *m, void *v)
{
	unsigned int i;

	seq_printf(m, "%-25s\tHex        SET\n", "Description");

	switch ((unsigned long)m->private) {
	case 0:
		for (i = 0; i < ARRAY_SIZE(acpi_debug_layers); i++) {
			seq_printf(m, "%-25s\t0x%08lX [%c]\n",
				     acpi_debug_layers[i].name,
				     acpi_debug_layers[i].value,
				     (acpi_dbg_layer & acpi_debug_layers[i].
				      value) ? '*' : ' ');
		}
		seq_printf(m, "%-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 ? ' ' : '-');
		seq_printf(m,
			     "--\ndebug_layer = 0x%08X (* = enabled, - = partial)\n",
			     acpi_dbg_layer);
		break;
	case 1:
		for (i = 0; i < ARRAY_SIZE(acpi_debug_levels); i++) {
			seq_printf(m, "%-25s\t0x%08lX [%c]\n",
				     acpi_debug_levels[i].name,
				     acpi_debug_levels[i].value,
				     (acpi_dbg_level & acpi_debug_levels[i].
				      value) ? '*' : ' ');
		}
		seq_printf(m, "--\ndebug_level = 0x%08X (* = enabled)\n",
			     acpi_dbg_level);
		break;
	}
	return 0;
}

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

static ssize_t acpi_system_debug_proc_write(struct file *file,
			const char __user * buffer,
			size_t count, loff_t *pos)
{
	char debug_string[12] = { '\0' };


	if (count > sizeof(debug_string) - 1)
		return -EINVAL;

	if (copy_from_user(debug_string, buffer, count))
		return -EFAULT;

	debug_string[count] = '\0';

	switch ((unsigned long)PDE(file->f_path.dentry->d_inode)->data) {
	case 0:
		acpi_dbg_layer = simple_strtoul(debug_string, NULL, 0);
		break;
	case 1:
		acpi_dbg_level = simple_strtoul(debug_string, NULL, 0);
		break;
	default:
		return -EINVAL;
	}

	return count;
}

static const struct file_operations acpi_system_debug_proc_fops = {
	.owner		= THIS_MODULE,
	.open		= acpi_system_debug_proc_open,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= single_release,
	.write		= acpi_system_debug_proc_write,
};
#endif

int __init acpi_procfs_init(void)
{
#ifdef CONFIG_ACPI_PROCFS
	struct proc_dir_entry *entry;
	int error = 0;
	char *name;

	/* 'debug_layer' [R/W] */
	name = ACPI_SYSTEM_FILE_DEBUG_LAYER;
	entry = proc_create_data(name, S_IFREG | S_IRUGO | S_IWUSR,
				 acpi_root_dir, &acpi_system_debug_proc_fops,
				 (void *)0);
	if (!entry)
		goto Error;

	/* 'debug_level' [R/W] */
	name = ACPI_SYSTEM_FILE_DEBUG_LEVEL;
	entry = proc_create_data(name, S_IFREG | S_IRUGO | S_IWUSR,
				 acpi_root_dir, &acpi_system_debug_proc_fops,
				 (void *)1);
	if (!entry)
		goto Error;

      Done:
	return error;

      Error:
	remove_proc_entry(ACPI_SYSTEM_FILE_DEBUG_LEVEL, acpi_root_dir);
	remove_proc_entry(ACPI_SYSTEM_FILE_DEBUG_LAYER, acpi_root_dir);
	error = -ENODEV;
	goto Done;
#else
	return 0;
#endif
}

int __init acpi_debug_init(void)
{
	acpi_debugfs_init();
	acpi_procfs_init();
	return 0;
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* debug.c - ACPI debug interface to userspace.
	3	*/
	4
	5	#include <linux/proc_fs.h>
7d7decb2	6	#include <linux/seq_file.h>
1da177e4 LT	7	#include <linux/init.h>
	8	#include <linux/module.h>
	9	#include <linux/kernel.h>
	10	#include <linux/moduleparam.h>
a1a541d8	11	#include <linux/debugfs.h>
1da177e4 LT	12	#include <asm/uaccess.h>
1da177e4 LT	13	#include <acpi/acpi_drivers.h>
1da177e4 LT	14
1da177e4 LT	15	#define _COMPONENT ACPI_SYSTEM_COMPONENT
f52fd66d	16	ACPI_MODULE_NAME("debug");
219c3c8e	17
1da177e4 LT	18	struct acpi_dlayer {
	19	const char *name;
	20	unsigned long value;
	21	};
	22	struct acpi_dlevel {
	23	const char *name;
	24	unsigned long value;
	25	};
	26	#define ACPI_DEBUG_INIT(v) { .name = #v, .value = v }
	27
4be44fcd	28	static const struct acpi_dlayer acpi_debug_layers[] = {
1da177e4 LT	29	ACPI_DEBUG_INIT(ACPI_UTILITIES),
	30	ACPI_DEBUG_INIT(ACPI_HARDWARE),
	31	ACPI_DEBUG_INIT(ACPI_EVENTS),
	32	ACPI_DEBUG_INIT(ACPI_TABLES),
	33	ACPI_DEBUG_INIT(ACPI_NAMESPACE),
	34	ACPI_DEBUG_INIT(ACPI_PARSER),
	35	ACPI_DEBUG_INIT(ACPI_DISPATCHER),
	36	ACPI_DEBUG_INIT(ACPI_EXECUTER),
	37	ACPI_DEBUG_INIT(ACPI_RESOURCES),
	38	ACPI_DEBUG_INIT(ACPI_CA_DEBUGGER),
	39	ACPI_DEBUG_INIT(ACPI_OS_SERVICES),
	40	ACPI_DEBUG_INIT(ACPI_CA_DISASSEMBLER),
	41	ACPI_DEBUG_INIT(ACPI_COMPILER),
	42	ACPI_DEBUG_INIT(ACPI_TOOLS),
bdd72799 BH	43
	44	ACPI_DEBUG_INIT(ACPI_BUS_COMPONENT),
	45	ACPI_DEBUG_INIT(ACPI_AC_COMPONENT),
	46	ACPI_DEBUG_INIT(ACPI_BATTERY_COMPONENT),
	47	ACPI_DEBUG_INIT(ACPI_BUTTON_COMPONENT),
	48	ACPI_DEBUG_INIT(ACPI_SBS_COMPONENT),
	49	ACPI_DEBUG_INIT(ACPI_FAN_COMPONENT),
	50	ACPI_DEBUG_INIT(ACPI_PCI_COMPONENT),
	51	ACPI_DEBUG_INIT(ACPI_POWER_COMPONENT),
	52	ACPI_DEBUG_INIT(ACPI_CONTAINER_COMPONENT),
	53	ACPI_DEBUG_INIT(ACPI_SYSTEM_COMPONENT),
	54	ACPI_DEBUG_INIT(ACPI_THERMAL_COMPONENT),
	55	ACPI_DEBUG_INIT(ACPI_MEMORY_DEVICE_COMPONENT),
	56	ACPI_DEBUG_INIT(ACPI_VIDEO_COMPONENT),
	57	ACPI_DEBUG_INIT(ACPI_PROCESSOR_COMPONENT),
1da177e4 LT	58	};
1da177e4 LT	59
4be44fcd	60	static const struct acpi_dlevel acpi_debug_levels[] = {
1da177e4 LT	61	ACPI_DEBUG_INIT(ACPI_LV_INIT),
	62	ACPI_DEBUG_INIT(ACPI_LV_DEBUG_OBJECT),
	63	ACPI_DEBUG_INIT(ACPI_LV_INFO),
	64
	65	ACPI_DEBUG_INIT(ACPI_LV_INIT_NAMES),
	66	ACPI_DEBUG_INIT(ACPI_LV_PARSE),
	67	ACPI_DEBUG_INIT(ACPI_LV_LOAD),
	68	ACPI_DEBUG_INIT(ACPI_LV_DISPATCH),
	69	ACPI_DEBUG_INIT(ACPI_LV_EXEC),
	70	ACPI_DEBUG_INIT(ACPI_LV_NAMES),
	71	ACPI_DEBUG_INIT(ACPI_LV_OPREGION),
	72	ACPI_DEBUG_INIT(ACPI_LV_BFIELD),
	73	ACPI_DEBUG_INIT(ACPI_LV_TABLES),
	74	ACPI_DEBUG_INIT(ACPI_LV_VALUES),
	75	ACPI_DEBUG_INIT(ACPI_LV_OBJECTS),
	76	ACPI_DEBUG_INIT(ACPI_LV_RESOURCES),
	77	ACPI_DEBUG_INIT(ACPI_LV_USER_REQUESTS),
	78	ACPI_DEBUG_INIT(ACPI_LV_PACKAGE),
	79
	80	ACPI_DEBUG_INIT(ACPI_LV_ALLOCATIONS),
	81	ACPI_DEBUG_INIT(ACPI_LV_FUNCTIONS),
	82	ACPI_DEBUG_INIT(ACPI_LV_OPTIMIZATIONS),
	83
	84	ACPI_DEBUG_INIT(ACPI_LV_MUTEX),
	85	ACPI_DEBUG_INIT(ACPI_LV_THREADS),
	86	ACPI_DEBUG_INIT(ACPI_LV_IO),
	87	ACPI_DEBUG_INIT(ACPI_LV_INTERRUPTS),
	88
	89	ACPI_DEBUG_INIT(ACPI_LV_AML_DISASSEMBLE),
	90	ACPI_DEBUG_INIT(ACPI_LV_VERBOSE_INFO),
	91	ACPI_DEBUG_INIT(ACPI_LV_FULL_TABLES),
4be44fcd	92	ACPI_DEBUG_INIT(ACPI_LV_EVENTS),
1da177e4 LT	93	};
1da177e4 LT	94
219c3c8e ZR	95	/* --------------------------------------------------------------------------
	96	FS Interface (/sys)
	97	-------------------------------------------------------------------------- */
	98	static int param_get_debug_layer(char buffer, struct kernel_param kp) {
	99	int result = 0;
	100	int i;
	101
	102	result = sprintf(buffer, "%-25s\tHex SET\n", "Description");
	103
	104	for(i = 0; i <ARRAY_SIZE(acpi_debug_layers); i++) {
	105	result += sprintf(buffer+result, "%-25s\t0x%08lX [%c]\n",
	106	acpi_debug_layers[i].name,
	107	acpi_debug_layers[i].value,
	108	(acpi_dbg_layer & acpi_debug_layers[i].value) ? '*' : ' ');
	109	}
	110	result += sprintf(buffer+result, "%-25s\t0x%08X [%c]\n", "ACPI_ALL_DRIVERS",
	111	ACPI_ALL_DRIVERS,
	112	(acpi_dbg_layer & ACPI_ALL_DRIVERS) ==
	113	ACPI_ALL_DRIVERS ? '*' : (acpi_dbg_layer &
	114	ACPI_ALL_DRIVERS) == 0 ? ' ' : '-');
	115	result += sprintf(buffer+result, "--\ndebug_layer = 0x%08X ( * = enabled)\n", acpi_dbg_layer);
	116
	117	return result;
	118	}
	119
	120	static int param_get_debug_level(char buffer, struct kernel_param kp) {
	121	int result = 0;
	122	int i;
	123
	124	result = sprintf(buffer, "%-25s\tHex SET\n", "Description");
	125
	126	for (i = 0; i < ARRAY_SIZE(acpi_debug_levels); i++) {
	127	result += sprintf(buffer+result, "%-25s\t0x%08lX [%c]\n",
	128	acpi_debug_levels[i].name,
	129	acpi_debug_levels[i].value,
	130	(acpi_dbg_level & acpi_debug_levels[i].
	131	value) ? '*' : ' ');
	132	}
	133	result += sprintf(buffer+result, "--\ndebug_level = 0x%08X (* = enabled)\n",
	134	acpi_dbg_level);
	135
	136	return result;
	137	}
	138
	139	module_param_call(debug_layer, param_set_uint, param_get_debug_layer, &acpi_dbg_layer, 0644);
	140	module_param_call(debug_level, param_set_uint, param_get_debug_level, &acpi_dbg_level, 0644);
	141
4169c45f ZR	142	static char trace_method_name[6];
	143	module_param_string(trace_method_name, trace_method_name, 6, 0644);
	144	static unsigned int trace_debug_layer;
	145	module_param(trace_debug_layer, uint, 0644);
	146	static unsigned int trace_debug_level;
	147	module_param(trace_debug_level, uint, 0644);
	148
	149	static int param_set_trace_state(const char val, struct kernel_param kp)
	150	{
	151	int result = 0;
	152
	153	if (!strncmp(val, "enable", strlen("enable") - 1)) {
	154	result = acpi_debug_trace(trace_method_name, trace_debug_level,
	155	trace_debug_layer, 0);
	156	if (result)
	157	result = -EBUSY;
	158	goto exit;
	159	}
	160
	161	if (!strncmp(val, "disable", strlen("disable") - 1)) {
	162	int name = 0;
	163	result = acpi_debug_trace((char *)&name, trace_debug_level,
	164	trace_debug_layer, 0);
	165	if (result)
	166	result = -EBUSY;
	167	goto exit;
	168	}
	169
	170	if (!strncmp(val, "1", 1)) {
	171	result = acpi_debug_trace(trace_method_name, trace_debug_level,
	172	trace_debug_layer, 1);
	173	if (result)
	174	result = -EBUSY;
	175	goto exit;
	176	}
	177
	178	result = -EINVAL;
	179	exit:
	180	return result;
	181	}
	182
	183	static int param_get_trace_state(char buffer, struct kernel_param kp)
	184	{
	185	if (!acpi_gbl_trace_method_name)
	186	return sprintf(buffer, "disable");
	187	else {
	188	if (acpi_gbl_trace_flags & 1)
	189	return sprintf(buffer, "1");
	190	else
	191	return sprintf(buffer, "enable");
	192	}
	193	return 0;
	194	}
	195
	196	module_param_call(trace_state, param_set_trace_state, param_get_trace_state,
	197	NULL, 0644);
	198
a1a541d8 ZR	199	/* --------------------------------------------------------------------------
	200	DebugFS Interface
	201	-------------------------------------------------------------------------- */
	202
	203	static ssize_t cm_write(struct file file, const char __user user_buf,
	204	size_t count, loff_t *ppos)
	205	{
	206	static char *buf;
	207	static int uncopied_bytes;
	208	struct acpi_table_header table;
	209	acpi_status status;
	210
	211	if (!(*ppos)) {
	212	/* parse the table header to get the table length */
	213	if (count <= sizeof(struct acpi_table_header))
	214	return -EINVAL;
	215	if (copy_from_user(&table, user_buf,
	216	sizeof(struct acpi_table_header)))
	217	return -EFAULT;
	218	uncopied_bytes = table.length;
	219	buf = kzalloc(uncopied_bytes, GFP_KERNEL);
	220	if (!buf)
	221	return -ENOMEM;
	222	}
	223
	224	if (uncopied_bytes < count) {
	225	kfree(buf);
	226	return -EINVAL;
	227	}
	228
	229	if (copy_from_user(buf + (*ppos), user_buf, count)) {
	230	kfree(buf);
	231	return -EFAULT;
	232	}
	233
	234	uncopied_bytes -= count;
	235	*ppos += count;
	236
	237	if (!uncopied_bytes) {
	238	status = acpi_install_method(buf);
	239	kfree(buf);
	240	if (ACPI_FAILURE(status))
	241	return -EINVAL;
4bab30a0	242	add_taint(TAINT_OVERRIDDEN_ACPI_TABLE);
a1a541d8 ZR	243	}
	244
	245	return count;
	246	}
	247
	248	static const struct file_operations cm_fops = {
	249	.write = cm_write,
	250	};
	251
	252	static int acpi_debugfs_init(void)
	253	{
	254	struct dentry acpi_dir, cm_dentry;
	255
	256	acpi_dir = debugfs_create_dir("acpi", NULL);
	257	if (!acpi_dir)
	258	goto err;
	259
	260	cm_dentry = debugfs_create_file("custom_method", S_IWUGO,
	261	acpi_dir, NULL, &cm_fops);
	262	if (!cm_dentry)
	263	goto err;
	264
	265	return 0;
	266
	267	err:
	268	if (acpi_dir)
	269	debugfs_remove(acpi_dir);
	270	return -EINVAL;
	271	}
	272
219c3c8e ZR	273	/* --------------------------------------------------------------------------
	274	FS Interface (/proc)
	275	-------------------------------------------------------------------------- */
	276	#ifdef CONFIG_ACPI_PROCFS
	277	#define ACPI_SYSTEM_FILE_DEBUG_LAYER "debug_layer"
	278	#define ACPI_SYSTEM_FILE_DEBUG_LEVEL "debug_level"
	279
7d7decb2	280	static int acpi_system_debug_proc_show(struct seq_file m, void v)
1da177e4	281	{
4be44fcd	282	unsigned int i;
1da177e4	283
7d7decb2	284	seq_printf(m, "%-25s\tHex SET\n", "Description");
1da177e4	285
7d7decb2	286	switch ((unsigned long)m->private) {
1da177e4 LT	287	case 0:
1da177e4 LT	288	for (i = 0; i < ARRAY_SIZE(acpi_debug_layers); i++) {
7d7decb2	289	seq_printf(m, "%-25s\t0x%08lX [%c]\n",
4be44fcd LB	290	acpi_debug_layers[i].name,
	291	acpi_debug_layers[i].value,
	292	(acpi_dbg_layer & acpi_debug_layers[i].
	293	value) ? '*' : ' ');
1da177e4	294	}
7d7decb2	295	seq_printf(m, "%-25s\t0x%08X [%c]\n", "ACPI_ALL_DRIVERS",
4be44fcd LB	296	ACPI_ALL_DRIVERS,
	297	(acpi_dbg_layer & ACPI_ALL_DRIVERS) ==
	298	ACPI_ALL_DRIVERS ? '*' : (acpi_dbg_layer &
	299	ACPI_ALL_DRIVERS) ==
	300	0 ? ' ' : '-');
7d7decb2	301	seq_printf(m,
4be44fcd LB	302	"--\ndebug_layer = 0x%08X (* = enabled, - = partial)\n",
4be44fcd LB	303	acpi_dbg_layer);
1da177e4 LT	304	break;
	305	case 1:
	306	for (i = 0; i < ARRAY_SIZE(acpi_debug_levels); i++) {
7d7decb2	307	seq_printf(m, "%-25s\t0x%08lX [%c]\n",
4be44fcd LB	308	acpi_debug_levels[i].name,
	309	acpi_debug_levels[i].value,
	310	(acpi_dbg_level & acpi_debug_levels[i].
	311	value) ? '*' : ' ');
1da177e4	312	}
7d7decb2	313	seq_printf(m, "--\ndebug_level = 0x%08X (* = enabled)\n",
4be44fcd	314	acpi_dbg_level);
1da177e4	315	break;
1da177e4	316	}
7d7decb2 AD	317	return 0;
7d7decb2 AD	318	}
4be44fcd	319
7d7decb2 AD	320	static int acpi_system_debug_proc_open(struct inode inode, struct file file)
	321	{
	322	return single_open(file, acpi_system_debug_proc_show, PDE(inode)->data);
1da177e4 LT	323	}
1da177e4 LT	324
7d7decb2	325	static ssize_t acpi_system_debug_proc_write(struct file *file,
4be44fcd	326	const char __user * buffer,
7d7decb2	327	size_t count, loff_t *pos)
1da177e4	328	{
4be44fcd	329	char debug_string[12] = { '\0' };
1da177e4	330
1da177e4 LT	331
1da177e4 LT	332	if (count > sizeof(debug_string) - 1)
d550d98d	333	return -EINVAL;
1da177e4 LT	334
1da177e4 LT	335	if (copy_from_user(debug_string, buffer, count))
d550d98d	336	return -EFAULT;
1da177e4 LT	337
	338	debug_string[count] = '\0';
	339
7d7decb2	340	switch ((unsigned long)PDE(file->f_path.dentry->d_inode)->data) {
1da177e4 LT	341	case 0:
	342	acpi_dbg_layer = simple_strtoul(debug_string, NULL, 0);
	343	break;
	344	case 1:
	345	acpi_dbg_level = simple_strtoul(debug_string, NULL, 0);
	346	break;
	347	default:
d550d98d	348	return -EINVAL;
1da177e4 LT	349	}
1da177e4 LT	350
d550d98d	351	return count;
1da177e4	352	}
7d7decb2 AD	353
	354	static const struct file_operations acpi_system_debug_proc_fops = {
	355	.owner = THIS_MODULE,
	356	.open = acpi_system_debug_proc_open,
	357	.read = seq_read,
	358	.llseek = seq_lseek,
	359	.release = single_release,
	360	.write = acpi_system_debug_proc_write,
	361	};
84f810c3	362	#endif
1da177e4	363
a1a541d8	364	int __init acpi_procfs_init(void)
1da177e4	365	{
84f810c3	366	#ifdef CONFIG_ACPI_PROCFS
4be44fcd	367	struct proc_dir_entry *entry;
1da177e4	368	int error = 0;
4be44fcd	369	char *name;
1da177e4	370
1da177e4 LT	371	/* 'debug_layer' [R/W] */
1da177e4 LT	372	name = ACPI_SYSTEM_FILE_DEBUG_LAYER;
7d7decb2 AD	373	entry = proc_create_data(name, S_IFREG \| S_IRUGO \| S_IWUSR,
	374	acpi_root_dir, &acpi_system_debug_proc_fops,
	375	(void *)0);
	376	if (!entry)
1da177e4 LT	377	goto Error;
	378
	379	/* 'debug_level' [R/W] */
	380	name = ACPI_SYSTEM_FILE_DEBUG_LEVEL;
7d7decb2 AD	381	entry = proc_create_data(name, S_IFREG \| S_IRUGO \| S_IWUSR,
	382	acpi_root_dir, &acpi_system_debug_proc_fops,
	383	(void *)1);
	384	if (!entry)
1da177e4 LT	385	goto Error;
1da177e4 LT	386
4be44fcd	387	Done:
d550d98d	388	return error;
1da177e4	389
4be44fcd	390	Error:
1da177e4 LT	391	remove_proc_entry(ACPI_SYSTEM_FILE_DEBUG_LEVEL, acpi_root_dir);
1da177e4 LT	392	remove_proc_entry(ACPI_SYSTEM_FILE_DEBUG_LAYER, acpi_root_dir);
a6fc6720	393	error = -ENODEV;
1da177e4	394	goto Done;
84f810c3 BH	395	#else
84f810c3 BH	396	return 0;
219c3c8e	397	#endif
84f810c3	398	}
a1a541d8 ZR	399
	400	int __init acpi_debug_init(void)
	401	{
	402	acpi_debugfs_init();
	403	acpi_procfs_init();
	404	return 0;
	405	}