diff options
Diffstat (limited to 'drivers/acpi/debug.c')
| -rw-r--r-- | drivers/acpi/debug.c | 233 |
1 files changed, 233 insertions, 0 deletions
diff --git a/drivers/acpi/debug.c b/drivers/acpi/debug.c new file mode 100644 index 000000000000..2c0dac559f16 --- /dev/null +++ b/drivers/acpi/debug.c @@ -0,0 +1,233 @@ +/* + * 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'}; + + 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); |