| /* |
| * 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_COMPONENT |
| ACPI_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_IWUSR, |
| 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; |
| } |