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/*
* 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);
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