[linux-2.6-block.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_ERROR),
	ACPI_DEBUG_INIT(ACPI_LV_WARN),
	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);

/* --------------------------------------------------------------------------
                              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_ERROR),
	51	ACPI_DEBUG_INIT(ACPI_LV_WARN),
	52	ACPI_DEBUG_INIT(ACPI_LV_INIT),
	53	ACPI_DEBUG_INIT(ACPI_LV_DEBUG_OBJECT),
	54	ACPI_DEBUG_INIT(ACPI_LV_INFO),
	55
	56	ACPI_DEBUG_INIT(ACPI_LV_INIT_NAMES),
	57	ACPI_DEBUG_INIT(ACPI_LV_PARSE),
	58	ACPI_DEBUG_INIT(ACPI_LV_LOAD),
	59	ACPI_DEBUG_INIT(ACPI_LV_DISPATCH),
	60	ACPI_DEBUG_INIT(ACPI_LV_EXEC),
	61	ACPI_DEBUG_INIT(ACPI_LV_NAMES),
	62	ACPI_DEBUG_INIT(ACPI_LV_OPREGION),
	63	ACPI_DEBUG_INIT(ACPI_LV_BFIELD),
	64	ACPI_DEBUG_INIT(ACPI_LV_TABLES),
	65	ACPI_DEBUG_INIT(ACPI_LV_VALUES),
	66	ACPI_DEBUG_INIT(ACPI_LV_OBJECTS),
	67	ACPI_DEBUG_INIT(ACPI_LV_RESOURCES),
	68	ACPI_DEBUG_INIT(ACPI_LV_USER_REQUESTS),
	69	ACPI_DEBUG_INIT(ACPI_LV_PACKAGE),
	70
	71	ACPI_DEBUG_INIT(ACPI_LV_ALLOCATIONS),
	72	ACPI_DEBUG_INIT(ACPI_LV_FUNCTIONS),
	73	ACPI_DEBUG_INIT(ACPI_LV_OPTIMIZATIONS),
	74
	75	ACPI_DEBUG_INIT(ACPI_LV_MUTEX),
	76	ACPI_DEBUG_INIT(ACPI_LV_THREADS),
	77	ACPI_DEBUG_INIT(ACPI_LV_IO),
	78	ACPI_DEBUG_INIT(ACPI_LV_INTERRUPTS),
	79
	80	ACPI_DEBUG_INIT(ACPI_LV_AML_DISASSEMBLE),
	81	ACPI_DEBUG_INIT(ACPI_LV_VERBOSE_INFO),
	82	ACPI_DEBUG_INIT(ACPI_LV_FULL_TABLES),
4be44fcd	83	ACPI_DEBUG_INIT(ACPI_LV_EVENTS),
1da177e4 LT	84	};
1da177e4 LT	85
219c3c8e ZR	86	/* --------------------------------------------------------------------------
	87	FS Interface (/sys)
	88	-------------------------------------------------------------------------- */
	89	static int param_get_debug_layer(char buffer, struct kernel_param kp) {
	90	int result = 0;
	91	int i;
	92
	93	result = sprintf(buffer, "%-25s\tHex SET\n", "Description");
	94
	95	for(i = 0; i <ARRAY_SIZE(acpi_debug_layers); i++) {
	96	result += sprintf(buffer+result, "%-25s\t0x%08lX [%c]\n",
	97	acpi_debug_layers[i].name,
	98	acpi_debug_layers[i].value,
	99	(acpi_dbg_layer & acpi_debug_layers[i].value) ? '*' : ' ');
	100	}
	101	result += sprintf(buffer+result, "%-25s\t0x%08X [%c]\n", "ACPI_ALL_DRIVERS",
	102	ACPI_ALL_DRIVERS,
	103	(acpi_dbg_layer & ACPI_ALL_DRIVERS) ==
	104	ACPI_ALL_DRIVERS ? '*' : (acpi_dbg_layer &
	105	ACPI_ALL_DRIVERS) == 0 ? ' ' : '-');
	106	result += sprintf(buffer+result, "--\ndebug_layer = 0x%08X ( * = enabled)\n", acpi_dbg_layer);
	107
	108	return result;
	109	}
	110
	111	static int param_get_debug_level(char buffer, struct kernel_param kp) {
	112	int result = 0;
	113	int i;
	114
	115	result = sprintf(buffer, "%-25s\tHex SET\n", "Description");
	116
	117	for (i = 0; i < ARRAY_SIZE(acpi_debug_levels); i++) {
	118	result += sprintf(buffer+result, "%-25s\t0x%08lX [%c]\n",
	119	acpi_debug_levels[i].name,
	120	acpi_debug_levels[i].value,
	121	(acpi_dbg_level & acpi_debug_levels[i].
	122	value) ? '*' : ' ');
	123	}
	124	result += sprintf(buffer+result, "--\ndebug_level = 0x%08X (* = enabled)\n",
	125	acpi_dbg_level);
	126
	127	return result;
	128	}
	129
	130	module_param_call(debug_layer, param_set_uint, param_get_debug_layer, &acpi_dbg_layer, 0644);
	131	module_param_call(debug_level, param_set_uint, param_get_debug_level, &acpi_dbg_level, 0644);
	132
	133	/* --------------------------------------------------------------------------
	134	FS Interface (/proc)
	135	-------------------------------------------------------------------------- */
	136	#ifdef CONFIG_ACPI_PROCFS
	137	#define ACPI_SYSTEM_FILE_DEBUG_LAYER "debug_layer"
	138	#define ACPI_SYSTEM_FILE_DEBUG_LEVEL "debug_level"
	139
1da177e4	140	static int
4be44fcd LB	141	acpi_system_read_debug(char *page,
4be44fcd LB	142	char *start, off_t off, int count, int eof, void *data)
1da177e4	143	{
4be44fcd LB	144	char *p = page;
	145	int size = 0;
	146	unsigned int i;
1da177e4 LT	147
	148	if (off != 0)
	149	goto end;
	150
	151	p += sprintf(p, "%-25s\tHex SET\n", "Description");
	152
4be44fcd	153	switch ((unsigned long)data) {
1da177e4 LT	154	case 0:
	155	for (i = 0; i < ARRAY_SIZE(acpi_debug_layers); i++) {
	156	p += sprintf(p, "%-25s\t0x%08lX [%c]\n",
4be44fcd LB	157	acpi_debug_layers[i].name,
	158	acpi_debug_layers[i].value,
	159	(acpi_dbg_layer & acpi_debug_layers[i].
	160	value) ? '*' : ' ');
1da177e4 LT	161	}
1da177e4 LT	162	p += sprintf(p, "%-25s\t0x%08X [%c]\n", "ACPI_ALL_DRIVERS",
4be44fcd LB	163	ACPI_ALL_DRIVERS,
	164	(acpi_dbg_layer & ACPI_ALL_DRIVERS) ==
	165	ACPI_ALL_DRIVERS ? '*' : (acpi_dbg_layer &
	166	ACPI_ALL_DRIVERS) ==
	167	0 ? ' ' : '-');
1da177e4	168	p += sprintf(p,
4be44fcd LB	169	"--\ndebug_layer = 0x%08X (* = enabled, - = partial)\n",
4be44fcd LB	170	acpi_dbg_layer);
1da177e4 LT	171	break;
	172	case 1:
	173	for (i = 0; i < ARRAY_SIZE(acpi_debug_levels); i++) {
	174	p += sprintf(p, "%-25s\t0x%08lX [%c]\n",
4be44fcd LB	175	acpi_debug_levels[i].name,
	176	acpi_debug_levels[i].value,
	177	(acpi_dbg_level & acpi_debug_levels[i].
	178	value) ? '*' : ' ');
1da177e4 LT	179	}
1da177e4 LT	180	p += sprintf(p, "--\ndebug_level = 0x%08X (* = enabled)\n",
4be44fcd	181	acpi_dbg_level);
1da177e4 LT	182	break;
	183	default:
	184	p += sprintf(p, "Invalid debug option\n");
	185	break;
	186	}
4be44fcd LB	187
4be44fcd LB	188	end:
1da177e4	189	size = (p - page);
4be44fcd LB	190	if (size <= off + count)
4be44fcd LB	191	*eof = 1;
1da177e4 LT	192	*start = page + off;
1da177e4 LT	193	size -= off;
4be44fcd LB	194	if (size > count)
	195	size = count;
	196	if (size < 0)
	197	size = 0;
1da177e4 LT	198
	199	return size;
	200	}
	201
1da177e4	202	static int
4be44fcd LB	203	acpi_system_write_debug(struct file *file,
	204	const char __user * buffer,
	205	unsigned long count, void *data)
1da177e4	206	{
4be44fcd	207	char debug_string[12] = { '\0' };
1da177e4	208
1da177e4 LT	209
1da177e4 LT	210	if (count > sizeof(debug_string) - 1)
d550d98d	211	return -EINVAL;
1da177e4 LT	212
1da177e4 LT	213	if (copy_from_user(debug_string, buffer, count))
d550d98d	214	return -EFAULT;
1da177e4 LT	215
	216	debug_string[count] = '\0';
	217
4be44fcd	218	switch ((unsigned long)data) {
1da177e4 LT	219	case 0:
	220	acpi_dbg_layer = simple_strtoul(debug_string, NULL, 0);
	221	break;
	222	case 1:
	223	acpi_dbg_level = simple_strtoul(debug_string, NULL, 0);
	224	break;
	225	default:
d550d98d	226	return -EINVAL;
1da177e4 LT	227	}
1da177e4 LT	228
d550d98d	229	return count;
1da177e4 LT	230	}
	231
	232	static int __init acpi_debug_init(void)
	233	{
4be44fcd	234	struct proc_dir_entry *entry;
1da177e4	235	int error = 0;
4be44fcd	236	char *name;
1da177e4	237
1da177e4 LT	238
1da177e4 LT	239	if (acpi_disabled)
d550d98d	240	return 0;
1da177e4 LT	241
	242	/* 'debug_layer' [R/W] */
	243	name = ACPI_SYSTEM_FILE_DEBUG_LAYER;
4be44fcd LB	244	entry =
	245	create_proc_read_entry(name, S_IFREG \| S_IRUGO \| S_IWUSR,
	246	acpi_root_dir, acpi_system_read_debug,
	247	(void *)0);
1da177e4 LT	248	if (entry)
	249	entry->write_proc = acpi_system_write_debug;
	250	else
	251	goto Error;
	252
	253	/* 'debug_level' [R/W] */
	254	name = ACPI_SYSTEM_FILE_DEBUG_LEVEL;
4be44fcd LB	255	entry =
	256	create_proc_read_entry(name, S_IFREG \| S_IRUGO \| S_IWUSR,
	257	acpi_root_dir, acpi_system_read_debug,
	258	(void *)1);
	259	if (entry)
1da177e4 LT	260	entry->write_proc = acpi_system_write_debug;
	261	else
	262	goto Error;
	263
4be44fcd	264	Done:
d550d98d	265	return error;
1da177e4	266
4be44fcd	267	Error:
1da177e4 LT	268	remove_proc_entry(ACPI_SYSTEM_FILE_DEBUG_LEVEL, acpi_root_dir);
1da177e4 LT	269	remove_proc_entry(ACPI_SYSTEM_FILE_DEBUG_LAYER, acpi_root_dir);
a6fc6720	270	error = -ENODEV;
1da177e4 LT	271	goto Done;
	272	}
	273
	274	subsys_initcall(acpi_debug_init);
219c3c8e	275	#endif