/* * 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_COMPONENTACPI_MODULE_NAME("debug")#define ACPI_SYSTEM_FILE_DEBUG_LAYER	"debug_layer"#define ACPI_SYSTEM_FILE_DEBUG_LEVEL	"debug_level"#ifdef MODULE_PARAM_PREFIX#undef MODULE_PARAM_PREFIX#endif#define MODULE_PARAM_PREFIX    module_param(acpi_dbg_layer, uint, 0400);module_param(acpi_dbg_level, uint, 0400); 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),}; static intacpi_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 intacpi_system_write_debug(struct file *file,			const char __user * buffer,			unsigned long count, void *data){	char debug_string[12] = { '\0' }; 	ACPI_FUNCTION_TRACE("acpi_system_write_debug"); 	if (count > sizeof(debug_string) - 1)		return_VALUE(-EINVAL); 	if (copy_from_user(debug_string, buffer, count))		return_VALUE(-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_VALUE(-EINVAL);	} 	return_VALUE(count);} static int __init acpi_debug_init(void){	struct proc_dir_entry *entry;	int error = 0;	char *name; 	ACPI_FUNCTION_TRACE("acpi_debug_init"); 	if (acpi_disabled)		return_VALUE(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_VALUE(error);       Error:	ACPI_DEBUG_PRINT((ACPI_DB_ERROR,			  "Unable to create '%s' proc fs entry\n", name)); 	remove_proc_entry(ACPI_SYSTEM_FILE_DEBUG_LEVEL, acpi_root_dir);	remove_proc_entry(ACPI_SYSTEM_FILE_DEBUG_LAYER, acpi_root_dir);	error = -EFAULT;	goto Done;} subsys_initcall(acpi_debug_init);