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