diff options
Diffstat (limited to 'drivers/acpi/debug.c')
| -rw-r--r-- | drivers/acpi/debug.c | 345 |
1 files changed, 345 insertions, 0 deletions
diff --git a/drivers/acpi/debug.c b/drivers/acpi/debug.c new file mode 100644 index 0000000..c483968 --- /dev/null +++ b/drivers/acpi/debug.c @@ -0,0 +1,345 @@ +/* + * 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), + + 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); + +/* -------------------------------------------------------------------------- + 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 |
