/* * 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_COMPONENTACPI_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); /* --------------------------------------------------------------------------				DebugFS Interface   -------------------------------------------------------------------------- */ static ssize_t cm_write(struct file *file, const char __user *user_buf,			size_t count, loff_t *ppos){	static char *buf;	static int uncopied_bytes;	struct acpi_table_header table;	acpi_status status; 	if (!(*ppos)) {		/* parse the table header to get the table length */		if (count <= sizeof(struct acpi_table_header))			return -EINVAL;		if (copy_from_user(&table, user_buf,			sizeof(struct acpi_table_header)))			return -EFAULT;		uncopied_bytes = table.length;		buf = kzalloc(uncopied_bytes, GFP_KERNEL);		if (!buf)			return -ENOMEM;	} 	if (uncopied_bytes < count) {		kfree(buf);		return -EINVAL;	} 	if (copy_from_user(buf + (*ppos), user_buf, count)) {		kfree(buf);		return -EFAULT;	} 	uncopied_bytes -= count;	*ppos += count; 	if (!uncopied_bytes) {		status = acpi_install_method(buf);		kfree(buf);		if (ACPI_FAILURE(status))			return -EINVAL;		add_taint(TAINT_OVERRIDDEN_ACPI_TABLE);	} 	return count;} static const struct file_operations cm_fops = {	.write = cm_write,}; static int acpi_debugfs_init(void){	struct dentry *acpi_dir, *cm_dentry; 	acpi_dir = debugfs_create_dir("acpi", NULL);	if (!acpi_dir)		goto err; 	cm_dentry = debugfs_create_file("custom_method", S_IWUGO,					acpi_dir, NULL, &cm_fops);	if (!cm_dentry)		goto err; 	return 0; err:	if (acpi_dir)		debugfs_remove(acpi_dir);	return -EINVAL;} /* --------------------------------------------------------------------------                              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_debugfs_init();	acpi_procfs_init();	return 0;}