[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>

#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);

/* --------------------------------------------------------------------------
                              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;
}
#endif

int __init acpi_debug_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 =
	    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;
#else
	return 0;
#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>
1da177e4 LT	12
1da177e4 LT	13	#define _COMPONENT ACPI_SYSTEM_COMPONENT
f52fd66d	14	ACPI_MODULE_NAME("debug");
219c3c8e	15
1da177e4 LT	16	struct acpi_dlayer {
	17	const char *name;
	18	unsigned long value;
	19	};
	20	struct acpi_dlevel {
	21	const char *name;
	22	unsigned long value;
	23	};
	24	#define ACPI_DEBUG_INIT(v) { .name = #v, .value = v }
	25
4be44fcd	26	static const struct acpi_dlayer acpi_debug_layers[] = {
1da177e4 LT	27	ACPI_DEBUG_INIT(ACPI_UTILITIES),
	28	ACPI_DEBUG_INIT(ACPI_HARDWARE),
	29	ACPI_DEBUG_INIT(ACPI_EVENTS),
	30	ACPI_DEBUG_INIT(ACPI_TABLES),
	31	ACPI_DEBUG_INIT(ACPI_NAMESPACE),
	32	ACPI_DEBUG_INIT(ACPI_PARSER),
	33	ACPI_DEBUG_INIT(ACPI_DISPATCHER),
	34	ACPI_DEBUG_INIT(ACPI_EXECUTER),
	35	ACPI_DEBUG_INIT(ACPI_RESOURCES),
	36	ACPI_DEBUG_INIT(ACPI_CA_DEBUGGER),
	37	ACPI_DEBUG_INIT(ACPI_OS_SERVICES),
	38	ACPI_DEBUG_INIT(ACPI_CA_DISASSEMBLER),
	39	ACPI_DEBUG_INIT(ACPI_COMPILER),
	40	ACPI_DEBUG_INIT(ACPI_TOOLS),
bdd72799 BH	41
	42	ACPI_DEBUG_INIT(ACPI_BUS_COMPONENT),
	43	ACPI_DEBUG_INIT(ACPI_AC_COMPONENT),
	44	ACPI_DEBUG_INIT(ACPI_BATTERY_COMPONENT),
	45	ACPI_DEBUG_INIT(ACPI_BUTTON_COMPONENT),
	46	ACPI_DEBUG_INIT(ACPI_SBS_COMPONENT),
	47	ACPI_DEBUG_INIT(ACPI_FAN_COMPONENT),
	48	ACPI_DEBUG_INIT(ACPI_PCI_COMPONENT),
	49	ACPI_DEBUG_INIT(ACPI_POWER_COMPONENT),
	50	ACPI_DEBUG_INIT(ACPI_CONTAINER_COMPONENT),
	51	ACPI_DEBUG_INIT(ACPI_SYSTEM_COMPONENT),
	52	ACPI_DEBUG_INIT(ACPI_THERMAL_COMPONENT),
	53	ACPI_DEBUG_INIT(ACPI_MEMORY_DEVICE_COMPONENT),
	54	ACPI_DEBUG_INIT(ACPI_VIDEO_COMPONENT),
	55	ACPI_DEBUG_INIT(ACPI_PROCESSOR_COMPONENT),
1da177e4 LT	56	};
1da177e4 LT	57
4be44fcd	58	static const struct acpi_dlevel acpi_debug_levels[] = {
1da177e4 LT	59	ACPI_DEBUG_INIT(ACPI_LV_INIT),
	60	ACPI_DEBUG_INIT(ACPI_LV_DEBUG_OBJECT),
	61	ACPI_DEBUG_INIT(ACPI_LV_INFO),
	62
	63	ACPI_DEBUG_INIT(ACPI_LV_INIT_NAMES),
	64	ACPI_DEBUG_INIT(ACPI_LV_PARSE),
	65	ACPI_DEBUG_INIT(ACPI_LV_LOAD),
	66	ACPI_DEBUG_INIT(ACPI_LV_DISPATCH),
	67	ACPI_DEBUG_INIT(ACPI_LV_EXEC),
	68	ACPI_DEBUG_INIT(ACPI_LV_NAMES),
	69	ACPI_DEBUG_INIT(ACPI_LV_OPREGION),
	70	ACPI_DEBUG_INIT(ACPI_LV_BFIELD),
	71	ACPI_DEBUG_INIT(ACPI_LV_TABLES),
	72	ACPI_DEBUG_INIT(ACPI_LV_VALUES),
	73	ACPI_DEBUG_INIT(ACPI_LV_OBJECTS),
	74	ACPI_DEBUG_INIT(ACPI_LV_RESOURCES),
	75	ACPI_DEBUG_INIT(ACPI_LV_USER_REQUESTS),
	76	ACPI_DEBUG_INIT(ACPI_LV_PACKAGE),
	77
	78	ACPI_DEBUG_INIT(ACPI_LV_ALLOCATIONS),
	79	ACPI_DEBUG_INIT(ACPI_LV_FUNCTIONS),
	80	ACPI_DEBUG_INIT(ACPI_LV_OPTIMIZATIONS),
	81
	82	ACPI_DEBUG_INIT(ACPI_LV_MUTEX),
	83	ACPI_DEBUG_INIT(ACPI_LV_THREADS),
	84	ACPI_DEBUG_INIT(ACPI_LV_IO),
	85	ACPI_DEBUG_INIT(ACPI_LV_INTERRUPTS),
	86
	87	ACPI_DEBUG_INIT(ACPI_LV_AML_DISASSEMBLE),
	88	ACPI_DEBUG_INIT(ACPI_LV_VERBOSE_INFO),
	89	ACPI_DEBUG_INIT(ACPI_LV_FULL_TABLES),
4be44fcd	90	ACPI_DEBUG_INIT(ACPI_LV_EVENTS),
1da177e4 LT	91	};
1da177e4 LT	92
219c3c8e ZR	93	/* --------------------------------------------------------------------------
	94	FS Interface (/sys)
	95	-------------------------------------------------------------------------- */
	96	static int param_get_debug_layer(char buffer, struct kernel_param kp) {
	97	int result = 0;
	98	int i;
	99
	100	result = sprintf(buffer, "%-25s\tHex SET\n", "Description");
	101
	102	for(i = 0; i <ARRAY_SIZE(acpi_debug_layers); i++) {
	103	result += sprintf(buffer+result, "%-25s\t0x%08lX [%c]\n",
	104	acpi_debug_layers[i].name,
	105	acpi_debug_layers[i].value,
	106	(acpi_dbg_layer & acpi_debug_layers[i].value) ? '*' : ' ');
	107	}
	108	result += sprintf(buffer+result, "%-25s\t0x%08X [%c]\n", "ACPI_ALL_DRIVERS",
	109	ACPI_ALL_DRIVERS,
	110	(acpi_dbg_layer & ACPI_ALL_DRIVERS) ==
	111	ACPI_ALL_DRIVERS ? '*' : (acpi_dbg_layer &
	112	ACPI_ALL_DRIVERS) == 0 ? ' ' : '-');
	113	result += sprintf(buffer+result, "--\ndebug_layer = 0x%08X ( * = enabled)\n", acpi_dbg_layer);
	114
	115	return result;
	116	}
	117
	118	static int param_get_debug_level(char buffer, struct kernel_param kp) {
	119	int result = 0;
	120	int i;
	121
	122	result = sprintf(buffer, "%-25s\tHex SET\n", "Description");
	123
	124	for (i = 0; i < ARRAY_SIZE(acpi_debug_levels); i++) {
	125	result += sprintf(buffer+result, "%-25s\t0x%08lX [%c]\n",
	126	acpi_debug_levels[i].name,
	127	acpi_debug_levels[i].value,
	128	(acpi_dbg_level & acpi_debug_levels[i].
	129	value) ? '*' : ' ');
	130	}
	131	result += sprintf(buffer+result, "--\ndebug_level = 0x%08X (* = enabled)\n",
	132	acpi_dbg_level);
	133
	134	return result;
	135	}
	136
	137	module_param_call(debug_layer, param_set_uint, param_get_debug_layer, &acpi_dbg_layer, 0644);
	138	module_param_call(debug_level, param_set_uint, param_get_debug_level, &acpi_dbg_level, 0644);
	139
4169c45f ZR	140	static char trace_method_name[6];
	141	module_param_string(trace_method_name, trace_method_name, 6, 0644);
	142	static unsigned int trace_debug_layer;
	143	module_param(trace_debug_layer, uint, 0644);
	144	static unsigned int trace_debug_level;
	145	module_param(trace_debug_level, uint, 0644);
	146
	147	static int param_set_trace_state(const char val, struct kernel_param kp)
	148	{
	149	int result = 0;
	150
	151	if (!strncmp(val, "enable", strlen("enable") - 1)) {
	152	result = acpi_debug_trace(trace_method_name, trace_debug_level,
	153	trace_debug_layer, 0);
	154	if (result)
	155	result = -EBUSY;
	156	goto exit;
	157	}
	158
	159	if (!strncmp(val, "disable", strlen("disable") - 1)) {
	160	int name = 0;
	161	result = acpi_debug_trace((char *)&name, trace_debug_level,
	162	trace_debug_layer, 0);
	163	if (result)
	164	result = -EBUSY;
	165	goto exit;
	166	}
	167
	168	if (!strncmp(val, "1", 1)) {
	169	result = acpi_debug_trace(trace_method_name, trace_debug_level,
	170	trace_debug_layer, 1);
	171	if (result)
	172	result = -EBUSY;
	173	goto exit;
	174	}
	175
	176	result = -EINVAL;
	177	exit:
	178	return result;
	179	}
	180
	181	static int param_get_trace_state(char buffer, struct kernel_param kp)
	182	{
	183	if (!acpi_gbl_trace_method_name)
	184	return sprintf(buffer, "disable");
	185	else {
	186	if (acpi_gbl_trace_flags & 1)
	187	return sprintf(buffer, "1");
	188	else
	189	return sprintf(buffer, "enable");
	190	}
	191	return 0;
	192	}
	193
	194	module_param_call(trace_state, param_set_trace_state, param_get_trace_state,
	195	NULL, 0644);
	196
219c3c8e ZR	197	/* --------------------------------------------------------------------------
	198	FS Interface (/proc)
	199	-------------------------------------------------------------------------- */
	200	#ifdef CONFIG_ACPI_PROCFS
	201	#define ACPI_SYSTEM_FILE_DEBUG_LAYER "debug_layer"
	202	#define ACPI_SYSTEM_FILE_DEBUG_LEVEL "debug_level"
	203
1da177e4	204	static int
4be44fcd LB	205	acpi_system_read_debug(char *page,
4be44fcd LB	206	char *start, off_t off, int count, int eof, void *data)
1da177e4	207	{
4be44fcd LB	208	char *p = page;
	209	int size = 0;
	210	unsigned int i;
1da177e4 LT	211
	212	if (off != 0)
	213	goto end;
	214
	215	p += sprintf(p, "%-25s\tHex SET\n", "Description");
	216
4be44fcd	217	switch ((unsigned long)data) {
1da177e4 LT	218	case 0:
	219	for (i = 0; i < ARRAY_SIZE(acpi_debug_layers); i++) {
	220	p += sprintf(p, "%-25s\t0x%08lX [%c]\n",
4be44fcd LB	221	acpi_debug_layers[i].name,
	222	acpi_debug_layers[i].value,
	223	(acpi_dbg_layer & acpi_debug_layers[i].
	224	value) ? '*' : ' ');
1da177e4 LT	225	}
1da177e4 LT	226	p += sprintf(p, "%-25s\t0x%08X [%c]\n", "ACPI_ALL_DRIVERS",
4be44fcd LB	227	ACPI_ALL_DRIVERS,
	228	(acpi_dbg_layer & ACPI_ALL_DRIVERS) ==
	229	ACPI_ALL_DRIVERS ? '*' : (acpi_dbg_layer &
	230	ACPI_ALL_DRIVERS) ==
	231	0 ? ' ' : '-');
1da177e4	232	p += sprintf(p,
4be44fcd LB	233	"--\ndebug_layer = 0x%08X (* = enabled, - = partial)\n",
4be44fcd LB	234	acpi_dbg_layer);
1da177e4 LT	235	break;
	236	case 1:
	237	for (i = 0; i < ARRAY_SIZE(acpi_debug_levels); i++) {
	238	p += sprintf(p, "%-25s\t0x%08lX [%c]\n",
4be44fcd LB	239	acpi_debug_levels[i].name,
	240	acpi_debug_levels[i].value,
	241	(acpi_dbg_level & acpi_debug_levels[i].
	242	value) ? '*' : ' ');
1da177e4 LT	243	}
1da177e4 LT	244	p += sprintf(p, "--\ndebug_level = 0x%08X (* = enabled)\n",
4be44fcd	245	acpi_dbg_level);
1da177e4 LT	246	break;
	247	default:
	248	p += sprintf(p, "Invalid debug option\n");
	249	break;
	250	}
4be44fcd LB	251
4be44fcd LB	252	end:
1da177e4	253	size = (p - page);
4be44fcd LB	254	if (size <= off + count)
4be44fcd LB	255	*eof = 1;
1da177e4 LT	256	*start = page + off;
1da177e4 LT	257	size -= off;
4be44fcd LB	258	if (size > count)
	259	size = count;
	260	if (size < 0)
	261	size = 0;
1da177e4 LT	262
	263	return size;
	264	}
	265
1da177e4	266	static int
4be44fcd LB	267	acpi_system_write_debug(struct file *file,
	268	const char __user * buffer,
	269	unsigned long count, void *data)
1da177e4	270	{
4be44fcd	271	char debug_string[12] = { '\0' };
1da177e4	272
1da177e4 LT	273
1da177e4 LT	274	if (count > sizeof(debug_string) - 1)
d550d98d	275	return -EINVAL;
1da177e4 LT	276
1da177e4 LT	277	if (copy_from_user(debug_string, buffer, count))
d550d98d	278	return -EFAULT;
1da177e4 LT	279
	280	debug_string[count] = '\0';
	281
4be44fcd	282	switch ((unsigned long)data) {
1da177e4 LT	283	case 0:
	284	acpi_dbg_layer = simple_strtoul(debug_string, NULL, 0);
	285	break;
	286	case 1:
	287	acpi_dbg_level = simple_strtoul(debug_string, NULL, 0);
	288	break;
	289	default:
d550d98d	290	return -EINVAL;
1da177e4 LT	291	}
1da177e4 LT	292
d550d98d	293	return count;
1da177e4	294	}
84f810c3	295	#endif
1da177e4	296
84f810c3	297	int __init acpi_debug_init(void)
1da177e4	298	{
84f810c3	299	#ifdef CONFIG_ACPI_PROCFS
4be44fcd	300	struct proc_dir_entry *entry;
1da177e4	301	int error = 0;
4be44fcd	302	char *name;
1da177e4	303
1da177e4 LT	304	/* 'debug_layer' [R/W] */
1da177e4 LT	305	name = ACPI_SYSTEM_FILE_DEBUG_LAYER;
4be44fcd LB	306	entry =
	307	create_proc_read_entry(name, S_IFREG \| S_IRUGO \| S_IWUSR,
	308	acpi_root_dir, acpi_system_read_debug,
	309	(void *)0);
1da177e4 LT	310	if (entry)
	311	entry->write_proc = acpi_system_write_debug;
	312	else
	313	goto Error;
	314
	315	/* 'debug_level' [R/W] */
	316	name = ACPI_SYSTEM_FILE_DEBUG_LEVEL;
4be44fcd LB	317	entry =
	318	create_proc_read_entry(name, S_IFREG \| S_IRUGO \| S_IWUSR,
	319	acpi_root_dir, acpi_system_read_debug,
	320	(void *)1);
	321	if (entry)
1da177e4 LT	322	entry->write_proc = acpi_system_write_debug;
	323	else
	324	goto Error;
	325
4be44fcd	326	Done:
d550d98d	327	return error;
1da177e4	328
4be44fcd	329	Error:
1da177e4 LT	330	remove_proc_entry(ACPI_SYSTEM_FILE_DEBUG_LEVEL, acpi_root_dir);
1da177e4 LT	331	remove_proc_entry(ACPI_SYSTEM_FILE_DEBUG_LAYER, acpi_root_dir);
a6fc6720	332	error = -ENODEV;
1da177e4	333	goto Done;
84f810c3 BH	334	#else
84f810c3 BH	335	return 0;
219c3c8e	336	#endif
84f810c3	337	}