/* * 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") #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 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);