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

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

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

#define _COMPONENT		ACPI_SYSTEM_COMPONENT
ACPI_MODULE_NAME("debug");

#ifdef MODULE_PARAM_PREFIX
#undef MODULE_PARAM_PREFIX
#endif
#define MODULE_PARAM_PREFIX "acpi."

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),
};

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);

/* --------------------------------------------------------------------------
                              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_read_debug(char *page,
		       char **start, off_t off, int count, int *eof, void *data)
{
	char *p = page;
	int size = 0;
	unsigned int i;

	if (off != 0)
		goto end;

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

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

      end:
	size = (p - page);
	if (size <= off + count)
		*eof = 1;
	*start = page + off;
	size -= off;
	if (size > count)
		size = count;
	if (size < 0)
		size = 0;

	return size;
}

static int
acpi_system_write_debug(struct file *file,
			const char __user * buffer,
			unsigned long count, void *data)
{
	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)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 int __init acpi_debug_init(void)
{
	struct proc_dir_entry *entry;
	int error = 0;
	char *name;


	if (acpi_disabled)
		return 0;

	/* 'debug_layer' [R/W] */
	name = ACPI_SYSTEM_FILE_DEBUG_LAYER;
	entry =
	    create_proc_read_entry(name, S_IFREG | S_IRUGO | S_IWUSR,
				   acpi_root_dir, acpi_system_read_debug,
				   (void *)0);
	if (entry)
		entry->write_proc = acpi_system_write_debug;
	else
		goto Error;

	/* 'debug_level' [R/W] */
	name = ACPI_SYSTEM_FILE_DEBUG_LEVEL;
	entry =
	    create_proc_read_entry(name, S_IFREG | S_IRUGO | S_IWUSR,
				   acpi_root_dir, acpi_system_read_debug,
				   (void *)1);
	if (entry)
		entry->write_proc = acpi_system_write_debug;
	else
		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;
}

subsys_initcall(acpi_debug_init);
#endif
Commit	Line	Data
1da177e4 LT	1	/*
	2	* debug.c - ACPI debug interface to userspace.
	3	*/
	4
	5	#include <linux/proc_fs.h>
	6	#include <linux/init.h>
	7	#include <linux/module.h>
	8	#include <linux/kernel.h>
	9	#include <linux/moduleparam.h>
	10	#include <asm/uaccess.h>
	11	#include <acpi/acpi_drivers.h>
	12	#include <acpi/acglobal.h>
	13
	14	#define _COMPONENT ACPI_SYSTEM_COMPONENT
f52fd66d	15	ACPI_MODULE_NAME("debug");
219c3c8e	16
1da177e4 LT	17	#ifdef MODULE_PARAM_PREFIX
	18	#undef MODULE_PARAM_PREFIX
	19	#endif
219c3c8e	20	#define MODULE_PARAM_PREFIX "acpi."
1da177e4 LT	21
	22	struct acpi_dlayer {
	23	const char *name;
	24	unsigned long value;
	25	};
	26	struct acpi_dlevel {
	27	const char *name;
	28	unsigned long value;
	29	};
	30	#define ACPI_DEBUG_INIT(v) { .name = #v, .value = v }
	31
4be44fcd	32	static const struct acpi_dlayer acpi_debug_layers[] = {
1da177e4 LT	33	ACPI_DEBUG_INIT(ACPI_UTILITIES),
	34	ACPI_DEBUG_INIT(ACPI_HARDWARE),
	35	ACPI_DEBUG_INIT(ACPI_EVENTS),
	36	ACPI_DEBUG_INIT(ACPI_TABLES),
	37	ACPI_DEBUG_INIT(ACPI_NAMESPACE),
	38	ACPI_DEBUG_INIT(ACPI_PARSER),
	39	ACPI_DEBUG_INIT(ACPI_DISPATCHER),
	40	ACPI_DEBUG_INIT(ACPI_EXECUTER),
	41	ACPI_DEBUG_INIT(ACPI_RESOURCES),
	42	ACPI_DEBUG_INIT(ACPI_CA_DEBUGGER),
	43	ACPI_DEBUG_INIT(ACPI_OS_SERVICES),
	44	ACPI_DEBUG_INIT(ACPI_CA_DISASSEMBLER),
	45	ACPI_DEBUG_INIT(ACPI_COMPILER),
	46	ACPI_DEBUG_INIT(ACPI_TOOLS),
	47	};
	48
4be44fcd	49	static const struct acpi_dlevel acpi_debug_levels[] = {
1da177e4 LT	50	ACPI_DEBUG_INIT(ACPI_LV_INIT),
	51	ACPI_DEBUG_INIT(ACPI_LV_DEBUG_OBJECT),
	52	ACPI_DEBUG_INIT(ACPI_LV_INFO),
	53
	54	ACPI_DEBUG_INIT(ACPI_LV_INIT_NAMES),
	55	ACPI_DEBUG_INIT(ACPI_LV_PARSE),
	56	ACPI_DEBUG_INIT(ACPI_LV_LOAD),
	57	ACPI_DEBUG_INIT(ACPI_LV_DISPATCH),
	58	ACPI_DEBUG_INIT(ACPI_LV_EXEC),
	59	ACPI_DEBUG_INIT(ACPI_LV_NAMES),
	60	ACPI_DEBUG_INIT(ACPI_LV_OPREGION),
	61	ACPI_DEBUG_INIT(ACPI_LV_BFIELD),
	62	ACPI_DEBUG_INIT(ACPI_LV_TABLES),
	63	ACPI_DEBUG_INIT(ACPI_LV_VALUES),
	64	ACPI_DEBUG_INIT(ACPI_LV_OBJECTS),
	65	ACPI_DEBUG_INIT(ACPI_LV_RESOURCES),
	66	ACPI_DEBUG_INIT(ACPI_LV_USER_REQUESTS),
	67	ACPI_DEBUG_INIT(ACPI_LV_PACKAGE),
	68
	69	ACPI_DEBUG_INIT(ACPI_LV_ALLOCATIONS),
	70	ACPI_DEBUG_INIT(ACPI_LV_FUNCTIONS),
	71	ACPI_DEBUG_INIT(ACPI_LV_OPTIMIZATIONS),
	72
	73	ACPI_DEBUG_INIT(ACPI_LV_MUTEX),
	74	ACPI_DEBUG_INIT(ACPI_LV_THREADS),
	75	ACPI_DEBUG_INIT(ACPI_LV_IO),
	76	ACPI_DEBUG_INIT(ACPI_LV_INTERRUPTS),
	77
	78	ACPI_DEBUG_INIT(ACPI_LV_AML_DISASSEMBLE),
	79	ACPI_DEBUG_INIT(ACPI_LV_VERBOSE_INFO),
	80	ACPI_DEBUG_INIT(ACPI_LV_FULL_TABLES),
4be44fcd	81	ACPI_DEBUG_INIT(ACPI_LV_EVENTS),
1da177e4 LT	82	};
1da177e4 LT	83
219c3c8e ZR	84	/* --------------------------------------------------------------------------
	85	FS Interface (/sys)
	86	-------------------------------------------------------------------------- */
	87	static int param_get_debug_layer(char buffer, struct kernel_param kp) {
	88	int result = 0;
	89	int i;
	90
	91	result = sprintf(buffer, "%-25s\tHex SET\n", "Description");
	92
	93	for(i = 0; i <ARRAY_SIZE(acpi_debug_layers); i++) {
	94	result += sprintf(buffer+result, "%-25s\t0x%08lX [%c]\n",
	95	acpi_debug_layers[i].name,
	96	acpi_debug_layers[i].value,
	97	(acpi_dbg_layer & acpi_debug_layers[i].value) ? '*' : ' ');
	98	}
	99	result += sprintf(buffer+result, "%-25s\t0x%08X [%c]\n", "ACPI_ALL_DRIVERS",
	100	ACPI_ALL_DRIVERS,
	101	(acpi_dbg_layer & ACPI_ALL_DRIVERS) ==
	102	ACPI_ALL_DRIVERS ? '*' : (acpi_dbg_layer &
	103	ACPI_ALL_DRIVERS) == 0 ? ' ' : '-');
	104	result += sprintf(buffer+result, "--\ndebug_layer = 0x%08X ( * = enabled)\n", acpi_dbg_layer);
	105
	106	return result;
	107	}
	108
	109	static int param_get_debug_level(char buffer, struct kernel_param kp) {
	110	int result = 0;
	111	int i;
	112
	113	result = sprintf(buffer, "%-25s\tHex SET\n", "Description");
	114
	115	for (i = 0; i < ARRAY_SIZE(acpi_debug_levels); i++) {
	116	result += sprintf(buffer+result, "%-25s\t0x%08lX [%c]\n",
	117	acpi_debug_levels[i].name,
	118	acpi_debug_levels[i].value,
	119	(acpi_dbg_level & acpi_debug_levels[i].
	120	value) ? '*' : ' ');
	121	}
	122	result += sprintf(buffer+result, "--\ndebug_level = 0x%08X (* = enabled)\n",
	123	acpi_dbg_level);
	124
	125	return result;
	126	}
	127
	128	module_param_call(debug_layer, param_set_uint, param_get_debug_layer, &acpi_dbg_layer, 0644);
	129	module_param_call(debug_level, param_set_uint, param_get_debug_level, &acpi_dbg_level, 0644);
	130
4169c45f ZR	131	static char trace_method_name[6];
	132	module_param_string(trace_method_name, trace_method_name, 6, 0644);
	133	static unsigned int trace_debug_layer;
	134	module_param(trace_debug_layer, uint, 0644);
	135	static unsigned int trace_debug_level;
	136	module_param(trace_debug_level, uint, 0644);
	137
	138	static int param_set_trace_state(const char val, struct kernel_param kp)
	139	{
	140	int result = 0;
	141
	142	if (!strncmp(val, "enable", strlen("enable") - 1)) {
	143	result = acpi_debug_trace(trace_method_name, trace_debug_level,
	144	trace_debug_layer, 0);
	145	if (result)
	146	result = -EBUSY;
	147	goto exit;
	148	}
	149
	150	if (!strncmp(val, "disable", strlen("disable") - 1)) {
	151	int name = 0;
	152	result = acpi_debug_trace((char *)&name, trace_debug_level,
	153	trace_debug_layer, 0);
	154	if (result)
	155	result = -EBUSY;
	156	goto exit;
	157	}
	158
	159	if (!strncmp(val, "1", 1)) {
	160	result = acpi_debug_trace(trace_method_name, trace_debug_level,
	161	trace_debug_layer, 1);
	162	if (result)
	163	result = -EBUSY;
	164	goto exit;
	165	}
	166
	167	result = -EINVAL;
	168	exit:
	169	return result;
	170	}
	171
	172	static int param_get_trace_state(char buffer, struct kernel_param kp)
	173	{
	174	if (!acpi_gbl_trace_method_name)
	175	return sprintf(buffer, "disable");
	176	else {
	177	if (acpi_gbl_trace_flags & 1)
	178	return sprintf(buffer, "1");
	179	else
	180	return sprintf(buffer, "enable");
	181	}
	182	return 0;
	183	}
	184
	185	module_param_call(trace_state, param_set_trace_state, param_get_trace_state,
	186	NULL, 0644);
	187
219c3c8e ZR	188	/* --------------------------------------------------------------------------
	189	FS Interface (/proc)
	190	-------------------------------------------------------------------------- */
	191	#ifdef CONFIG_ACPI_PROCFS
	192	#define ACPI_SYSTEM_FILE_DEBUG_LAYER "debug_layer"
	193	#define ACPI_SYSTEM_FILE_DEBUG_LEVEL "debug_level"
	194
1da177e4	195	static int
4be44fcd LB	196	acpi_system_read_debug(char *page,
4be44fcd LB	197	char *start, off_t off, int count, int eof, void *data)
1da177e4	198	{
4be44fcd LB	199	char *p = page;
	200	int size = 0;
	201	unsigned int i;
1da177e4 LT	202
	203	if (off != 0)
	204	goto end;
	205
	206	p += sprintf(p, "%-25s\tHex SET\n", "Description");
	207
4be44fcd	208	switch ((unsigned long)data) {
1da177e4 LT	209	case 0:
	210	for (i = 0; i < ARRAY_SIZE(acpi_debug_layers); i++) {
	211	p += sprintf(p, "%-25s\t0x%08lX [%c]\n",
4be44fcd LB	212	acpi_debug_layers[i].name,
	213	acpi_debug_layers[i].value,
	214	(acpi_dbg_layer & acpi_debug_layers[i].
	215	value) ? '*' : ' ');
1da177e4 LT	216	}
1da177e4 LT	217	p += sprintf(p, "%-25s\t0x%08X [%c]\n", "ACPI_ALL_DRIVERS",
4be44fcd LB	218	ACPI_ALL_DRIVERS,
	219	(acpi_dbg_layer & ACPI_ALL_DRIVERS) ==
	220	ACPI_ALL_DRIVERS ? '*' : (acpi_dbg_layer &
	221	ACPI_ALL_DRIVERS) ==
	222	0 ? ' ' : '-');
1da177e4	223	p += sprintf(p,
4be44fcd LB	224	"--\ndebug_layer = 0x%08X (* = enabled, - = partial)\n",
4be44fcd LB	225	acpi_dbg_layer);
1da177e4 LT	226	break;
	227	case 1:
	228	for (i = 0; i < ARRAY_SIZE(acpi_debug_levels); i++) {
	229	p += sprintf(p, "%-25s\t0x%08lX [%c]\n",
4be44fcd LB	230	acpi_debug_levels[i].name,
	231	acpi_debug_levels[i].value,
	232	(acpi_dbg_level & acpi_debug_levels[i].
	233	value) ? '*' : ' ');
1da177e4 LT	234	}
1da177e4 LT	235	p += sprintf(p, "--\ndebug_level = 0x%08X (* = enabled)\n",
4be44fcd	236	acpi_dbg_level);
1da177e4 LT	237	break;
	238	default:
	239	p += sprintf(p, "Invalid debug option\n");
	240	break;
	241	}
4be44fcd LB	242
4be44fcd LB	243	end:
1da177e4	244	size = (p - page);
4be44fcd LB	245	if (size <= off + count)
4be44fcd LB	246	*eof = 1;
1da177e4 LT	247	*start = page + off;
1da177e4 LT	248	size -= off;
4be44fcd LB	249	if (size > count)
	250	size = count;
	251	if (size < 0)
	252	size = 0;
1da177e4 LT	253
	254	return size;
	255	}
	256
1da177e4	257	static int
4be44fcd LB	258	acpi_system_write_debug(struct file *file,
	259	const char __user * buffer,
	260	unsigned long count, void *data)
1da177e4	261	{
4be44fcd	262	char debug_string[12] = { '\0' };
1da177e4	263
1da177e4 LT	264
1da177e4 LT	265	if (count > sizeof(debug_string) - 1)
d550d98d	266	return -EINVAL;
1da177e4 LT	267
1da177e4 LT	268	if (copy_from_user(debug_string, buffer, count))
d550d98d	269	return -EFAULT;
1da177e4 LT	270
	271	debug_string[count] = '\0';
	272
4be44fcd	273	switch ((unsigned long)data) {
1da177e4 LT	274	case 0:
	275	acpi_dbg_layer = simple_strtoul(debug_string, NULL, 0);
	276	break;
	277	case 1:
	278	acpi_dbg_level = simple_strtoul(debug_string, NULL, 0);
	279	break;
	280	default:
d550d98d	281	return -EINVAL;
1da177e4 LT	282	}
1da177e4 LT	283
d550d98d	284	return count;
1da177e4 LT	285	}
	286
	287	static int __init acpi_debug_init(void)
	288	{
4be44fcd	289	struct proc_dir_entry *entry;
1da177e4	290	int error = 0;
4be44fcd	291	char *name;
1da177e4	292
1da177e4 LT	293
1da177e4 LT	294	if (acpi_disabled)
d550d98d	295	return 0;
1da177e4 LT	296
	297	/* 'debug_layer' [R/W] */
	298	name = ACPI_SYSTEM_FILE_DEBUG_LAYER;
4be44fcd LB	299	entry =
	300	create_proc_read_entry(name, S_IFREG \| S_IRUGO \| S_IWUSR,
	301	acpi_root_dir, acpi_system_read_debug,
	302	(void *)0);
1da177e4 LT	303	if (entry)
	304	entry->write_proc = acpi_system_write_debug;
	305	else
	306	goto Error;
	307
	308	/* 'debug_level' [R/W] */
	309	name = ACPI_SYSTEM_FILE_DEBUG_LEVEL;
4be44fcd LB	310	entry =
	311	create_proc_read_entry(name, S_IFREG \| S_IRUGO \| S_IWUSR,
	312	acpi_root_dir, acpi_system_read_debug,
	313	(void *)1);
	314	if (entry)
1da177e4 LT	315	entry->write_proc = acpi_system_write_debug;
	316	else
	317	goto Error;
	318
4be44fcd	319	Done:
d550d98d	320	return error;
1da177e4	321
4be44fcd	322	Error:
1da177e4 LT	323	remove_proc_entry(ACPI_SYSTEM_FILE_DEBUG_LEVEL, acpi_root_dir);
1da177e4 LT	324	remove_proc_entry(ACPI_SYSTEM_FILE_DEBUG_LAYER, acpi_root_dir);
a6fc6720	325	error = -ENODEV;
1da177e4 LT	326	goto Done;
	327	}
	328
	329	subsys_initcall(acpi_debug_init);
219c3c8e	330	#endif