[net-next-2.6.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 <linux/slab.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_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_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>
5a0e3ad6	12	#include <linux/slab.h>
1da177e4 LT	13	#include <asm/uaccess.h>
1da177e4 LT	14	#include <acpi/acpi_drivers.h>
1da177e4 LT	15
1da177e4 LT	16	#define _COMPONENT ACPI_SYSTEM_COMPONENT
f52fd66d	17	ACPI_MODULE_NAME("debug");
219c3c8e	18
1da177e4 LT	19	struct acpi_dlayer {
	20	const char *name;
	21	unsigned long value;
	22	};
	23	struct acpi_dlevel {
	24	const char *name;
	25	unsigned long value;
	26	};
	27	#define ACPI_DEBUG_INIT(v) { .name = #v, .value = v }
	28
4be44fcd	29	static const struct acpi_dlayer acpi_debug_layers[] = {
1da177e4 LT	30	ACPI_DEBUG_INIT(ACPI_UTILITIES),
	31	ACPI_DEBUG_INIT(ACPI_HARDWARE),
	32	ACPI_DEBUG_INIT(ACPI_EVENTS),
	33	ACPI_DEBUG_INIT(ACPI_TABLES),
	34	ACPI_DEBUG_INIT(ACPI_NAMESPACE),
	35	ACPI_DEBUG_INIT(ACPI_PARSER),
	36	ACPI_DEBUG_INIT(ACPI_DISPATCHER),
	37	ACPI_DEBUG_INIT(ACPI_EXECUTER),
	38	ACPI_DEBUG_INIT(ACPI_RESOURCES),
	39	ACPI_DEBUG_INIT(ACPI_CA_DEBUGGER),
	40	ACPI_DEBUG_INIT(ACPI_OS_SERVICES),
	41	ACPI_DEBUG_INIT(ACPI_CA_DISASSEMBLER),
	42	ACPI_DEBUG_INIT(ACPI_COMPILER),
	43	ACPI_DEBUG_INIT(ACPI_TOOLS),
bdd72799 BH	44
	45	ACPI_DEBUG_INIT(ACPI_BUS_COMPONENT),
	46	ACPI_DEBUG_INIT(ACPI_AC_COMPONENT),
	47	ACPI_DEBUG_INIT(ACPI_BATTERY_COMPONENT),
	48	ACPI_DEBUG_INIT(ACPI_BUTTON_COMPONENT),
	49	ACPI_DEBUG_INIT(ACPI_SBS_COMPONENT),
	50	ACPI_DEBUG_INIT(ACPI_FAN_COMPONENT),
	51	ACPI_DEBUG_INIT(ACPI_PCI_COMPONENT),
	52	ACPI_DEBUG_INIT(ACPI_POWER_COMPONENT),
	53	ACPI_DEBUG_INIT(ACPI_CONTAINER_COMPONENT),
	54	ACPI_DEBUG_INIT(ACPI_SYSTEM_COMPONENT),
	55	ACPI_DEBUG_INIT(ACPI_THERMAL_COMPONENT),
	56	ACPI_DEBUG_INIT(ACPI_MEMORY_DEVICE_COMPONENT),
	57	ACPI_DEBUG_INIT(ACPI_VIDEO_COMPONENT),
	58	ACPI_DEBUG_INIT(ACPI_PROCESSOR_COMPONENT),
1da177e4 LT	59	};
1da177e4 LT	60
4be44fcd	61	static const struct acpi_dlevel acpi_debug_levels[] = {
1da177e4 LT	62	ACPI_DEBUG_INIT(ACPI_LV_INIT),
	63	ACPI_DEBUG_INIT(ACPI_LV_DEBUG_OBJECT),
	64	ACPI_DEBUG_INIT(ACPI_LV_INFO),
	65
	66	ACPI_DEBUG_INIT(ACPI_LV_INIT_NAMES),
	67	ACPI_DEBUG_INIT(ACPI_LV_PARSE),
	68	ACPI_DEBUG_INIT(ACPI_LV_LOAD),
	69	ACPI_DEBUG_INIT(ACPI_LV_DISPATCH),
	70	ACPI_DEBUG_INIT(ACPI_LV_EXEC),
	71	ACPI_DEBUG_INIT(ACPI_LV_NAMES),
	72	ACPI_DEBUG_INIT(ACPI_LV_OPREGION),
	73	ACPI_DEBUG_INIT(ACPI_LV_BFIELD),
	74	ACPI_DEBUG_INIT(ACPI_LV_TABLES),
	75	ACPI_DEBUG_INIT(ACPI_LV_VALUES),
	76	ACPI_DEBUG_INIT(ACPI_LV_OBJECTS),
	77	ACPI_DEBUG_INIT(ACPI_LV_RESOURCES),
	78	ACPI_DEBUG_INIT(ACPI_LV_USER_REQUESTS),
	79	ACPI_DEBUG_INIT(ACPI_LV_PACKAGE),
	80
	81	ACPI_DEBUG_INIT(ACPI_LV_ALLOCATIONS),
	82	ACPI_DEBUG_INIT(ACPI_LV_FUNCTIONS),
	83	ACPI_DEBUG_INIT(ACPI_LV_OPTIMIZATIONS),
	84
	85	ACPI_DEBUG_INIT(ACPI_LV_MUTEX),
	86	ACPI_DEBUG_INIT(ACPI_LV_THREADS),
	87	ACPI_DEBUG_INIT(ACPI_LV_IO),
	88	ACPI_DEBUG_INIT(ACPI_LV_INTERRUPTS),
	89
	90	ACPI_DEBUG_INIT(ACPI_LV_AML_DISASSEMBLE),
	91	ACPI_DEBUG_INIT(ACPI_LV_VERBOSE_INFO),
	92	ACPI_DEBUG_INIT(ACPI_LV_FULL_TABLES),
4be44fcd	93	ACPI_DEBUG_INIT(ACPI_LV_EVENTS),
1da177e4 LT	94	};
1da177e4 LT	95
219c3c8e ZR	96	/* --------------------------------------------------------------------------
	97	FS Interface (/sys)
	98	-------------------------------------------------------------------------- */
	99	static int param_get_debug_layer(char buffer, struct kernel_param kp) {
	100	int result = 0;
	101	int i;
	102
	103	result = sprintf(buffer, "%-25s\tHex SET\n", "Description");
	104
	105	for(i = 0; i <ARRAY_SIZE(acpi_debug_layers); i++) {
	106	result += sprintf(buffer+result, "%-25s\t0x%08lX [%c]\n",
	107	acpi_debug_layers[i].name,
	108	acpi_debug_layers[i].value,
	109	(acpi_dbg_layer & acpi_debug_layers[i].value) ? '*' : ' ');
	110	}
	111	result += sprintf(buffer+result, "%-25s\t0x%08X [%c]\n", "ACPI_ALL_DRIVERS",
	112	ACPI_ALL_DRIVERS,
	113	(acpi_dbg_layer & ACPI_ALL_DRIVERS) ==
	114	ACPI_ALL_DRIVERS ? '*' : (acpi_dbg_layer &
	115	ACPI_ALL_DRIVERS) == 0 ? ' ' : '-');
	116	result += sprintf(buffer+result, "--\ndebug_layer = 0x%08X ( * = enabled)\n", acpi_dbg_layer);
	117
	118	return result;
	119	}
	120
	121	static int param_get_debug_level(char buffer, struct kernel_param kp) {
	122	int result = 0;
	123	int i;
	124
	125	result = sprintf(buffer, "%-25s\tHex SET\n", "Description");
	126
	127	for (i = 0; i < ARRAY_SIZE(acpi_debug_levels); i++) {
	128	result += sprintf(buffer+result, "%-25s\t0x%08lX [%c]\n",
	129	acpi_debug_levels[i].name,
	130	acpi_debug_levels[i].value,
	131	(acpi_dbg_level & acpi_debug_levels[i].
	132	value) ? '*' : ' ');
	133	}
	134	result += sprintf(buffer+result, "--\ndebug_level = 0x%08X (* = enabled)\n",
	135	acpi_dbg_level);
	136
	137	return result;
	138	}
	139
	140	module_param_call(debug_layer, param_set_uint, param_get_debug_layer, &acpi_dbg_layer, 0644);
	141	module_param_call(debug_level, param_set_uint, param_get_debug_level, &acpi_dbg_level, 0644);
	142
4169c45f ZR	143	static char trace_method_name[6];
	144	module_param_string(trace_method_name, trace_method_name, 6, 0644);
	145	static unsigned int trace_debug_layer;
	146	module_param(trace_debug_layer, uint, 0644);
	147	static unsigned int trace_debug_level;
	148	module_param(trace_debug_level, uint, 0644);
	149
	150	static int param_set_trace_state(const char val, struct kernel_param kp)
	151	{
	152	int result = 0;
	153
	154	if (!strncmp(val, "enable", strlen("enable") - 1)) {
	155	result = acpi_debug_trace(trace_method_name, trace_debug_level,
	156	trace_debug_layer, 0);
	157	if (result)
	158	result = -EBUSY;
	159	goto exit;
	160	}
	161
	162	if (!strncmp(val, "disable", strlen("disable") - 1)) {
	163	int name = 0;
	164	result = acpi_debug_trace((char *)&name, trace_debug_level,
	165	trace_debug_layer, 0);
	166	if (result)
	167	result = -EBUSY;
	168	goto exit;
	169	}
	170
	171	if (!strncmp(val, "1", 1)) {
	172	result = acpi_debug_trace(trace_method_name, trace_debug_level,
	173	trace_debug_layer, 1);
	174	if (result)
	175	result = -EBUSY;
	176	goto exit;
	177	}
	178
	179	result = -EINVAL;
	180	exit:
	181	return result;
	182	}
	183
	184	static int param_get_trace_state(char buffer, struct kernel_param kp)
	185	{
	186	if (!acpi_gbl_trace_method_name)
	187	return sprintf(buffer, "disable");
	188	else {
	189	if (acpi_gbl_trace_flags & 1)
	190	return sprintf(buffer, "1");
	191	else
	192	return sprintf(buffer, "enable");
	193	}
	194	return 0;
	195	}
	196
	197	module_param_call(trace_state, param_set_trace_state, param_get_trace_state,
	198	NULL, 0644);
	199
219c3c8e ZR	200	/* --------------------------------------------------------------------------
	201	FS Interface (/proc)
	202	-------------------------------------------------------------------------- */
	203	#ifdef CONFIG_ACPI_PROCFS
	204	#define ACPI_SYSTEM_FILE_DEBUG_LAYER "debug_layer"
	205	#define ACPI_SYSTEM_FILE_DEBUG_LEVEL "debug_level"
	206
7d7decb2	207	static int acpi_system_debug_proc_show(struct seq_file m, void v)
1da177e4	208	{
4be44fcd	209	unsigned int i;
1da177e4	210
7d7decb2	211	seq_printf(m, "%-25s\tHex SET\n", "Description");
1da177e4	212
7d7decb2	213	switch ((unsigned long)m->private) {
1da177e4 LT	214	case 0:
1da177e4 LT	215	for (i = 0; i < ARRAY_SIZE(acpi_debug_layers); i++) {
7d7decb2	216	seq_printf(m, "%-25s\t0x%08lX [%c]\n",
4be44fcd LB	217	acpi_debug_layers[i].name,
	218	acpi_debug_layers[i].value,
	219	(acpi_dbg_layer & acpi_debug_layers[i].
	220	value) ? '*' : ' ');
1da177e4	221	}
7d7decb2	222	seq_printf(m, "%-25s\t0x%08X [%c]\n", "ACPI_ALL_DRIVERS",
4be44fcd LB	223	ACPI_ALL_DRIVERS,
	224	(acpi_dbg_layer & ACPI_ALL_DRIVERS) ==
	225	ACPI_ALL_DRIVERS ? '*' : (acpi_dbg_layer &
	226	ACPI_ALL_DRIVERS) ==
	227	0 ? ' ' : '-');
7d7decb2	228	seq_printf(m,
4be44fcd LB	229	"--\ndebug_layer = 0x%08X (* = enabled, - = partial)\n",
4be44fcd LB	230	acpi_dbg_layer);
1da177e4 LT	231	break;
	232	case 1:
	233	for (i = 0; i < ARRAY_SIZE(acpi_debug_levels); i++) {
7d7decb2	234	seq_printf(m, "%-25s\t0x%08lX [%c]\n",
4be44fcd LB	235	acpi_debug_levels[i].name,
	236	acpi_debug_levels[i].value,
	237	(acpi_dbg_level & acpi_debug_levels[i].
	238	value) ? '*' : ' ');
1da177e4	239	}
7d7decb2	240	seq_printf(m, "--\ndebug_level = 0x%08X (* = enabled)\n",
4be44fcd	241	acpi_dbg_level);
1da177e4	242	break;
1da177e4	243	}
7d7decb2 AD	244	return 0;
7d7decb2 AD	245	}
4be44fcd	246
7d7decb2 AD	247	static int acpi_system_debug_proc_open(struct inode inode, struct file file)
	248	{
	249	return single_open(file, acpi_system_debug_proc_show, PDE(inode)->data);
1da177e4 LT	250	}
1da177e4 LT	251
7d7decb2	252	static ssize_t acpi_system_debug_proc_write(struct file *file,
4be44fcd	253	const char __user * buffer,
7d7decb2	254	size_t count, loff_t *pos)
1da177e4	255	{
4be44fcd	256	char debug_string[12] = { '\0' };
1da177e4	257
1da177e4 LT	258
1da177e4 LT	259	if (count > sizeof(debug_string) - 1)
d550d98d	260	return -EINVAL;
1da177e4 LT	261
1da177e4 LT	262	if (copy_from_user(debug_string, buffer, count))
d550d98d	263	return -EFAULT;
1da177e4 LT	264
	265	debug_string[count] = '\0';
	266
7d7decb2	267	switch ((unsigned long)PDE(file->f_path.dentry->d_inode)->data) {
1da177e4 LT	268	case 0:
	269	acpi_dbg_layer = simple_strtoul(debug_string, NULL, 0);
	270	break;
	271	case 1:
	272	acpi_dbg_level = simple_strtoul(debug_string, NULL, 0);
	273	break;
	274	default:
d550d98d	275	return -EINVAL;
1da177e4 LT	276	}
1da177e4 LT	277
d550d98d	278	return count;
1da177e4	279	}
7d7decb2 AD	280
	281	static const struct file_operations acpi_system_debug_proc_fops = {
	282	.owner = THIS_MODULE,
	283	.open = acpi_system_debug_proc_open,
	284	.read = seq_read,
	285	.llseek = seq_lseek,
	286	.release = single_release,
	287	.write = acpi_system_debug_proc_write,
	288	};
84f810c3	289	#endif
1da177e4	290
a1a541d8	291	int __init acpi_procfs_init(void)
1da177e4	292	{
84f810c3	293	#ifdef CONFIG_ACPI_PROCFS
4be44fcd	294	struct proc_dir_entry *entry;
1da177e4	295	int error = 0;
4be44fcd	296	char *name;
1da177e4	297
1da177e4 LT	298	/* 'debug_layer' [R/W] */
1da177e4 LT	299	name = ACPI_SYSTEM_FILE_DEBUG_LAYER;
7d7decb2 AD	300	entry = proc_create_data(name, S_IFREG \| S_IRUGO \| S_IWUSR,
	301	acpi_root_dir, &acpi_system_debug_proc_fops,
	302	(void *)0);
	303	if (!entry)
1da177e4 LT	304	goto Error;
	305
	306	/* 'debug_level' [R/W] */
	307	name = ACPI_SYSTEM_FILE_DEBUG_LEVEL;
7d7decb2 AD	308	entry = proc_create_data(name, S_IFREG \| S_IRUGO \| S_IWUSR,
	309	acpi_root_dir, &acpi_system_debug_proc_fops,
	310	(void *)1);
	311	if (!entry)
1da177e4 LT	312	goto Error;
1da177e4 LT	313
4be44fcd	314	Done:
d550d98d	315	return error;
1da177e4	316
4be44fcd	317	Error:
1da177e4 LT	318	remove_proc_entry(ACPI_SYSTEM_FILE_DEBUG_LEVEL, acpi_root_dir);
1da177e4 LT	319	remove_proc_entry(ACPI_SYSTEM_FILE_DEBUG_LAYER, acpi_root_dir);
a6fc6720	320	error = -ENODEV;
1da177e4	321	goto Done;
84f810c3 BH	322	#else
84f810c3 BH	323	return 0;
219c3c8e	324	#endif
84f810c3	325	}
a1a541d8 ZR	326
	327	int __init acpi_debug_init(void)
	328	{
a1a541d8 ZR	329	acpi_procfs_init();
	330	return 0;
	331	}