/* * sysfs.c - ACPI sysfs interface to userspace. */ #include <linux/init.h> #include <linux/kernel.h> #include <linux/moduleparam.h> #include <acpi/acpi_drivers.h> #define _COMPONENT ACPI_SYSTEM_COMPONENT ACPI_MODULE_NAME("sysfs"); #define PREFIX "ACPI: " #ifdef CONFIG_ACPI_DEBUG /* * ACPI debug sysfs I/F, including: * /sys/modules/acpi/parameters/debug_layer * /sys/modules/acpi/parameters/debug_level * /sys/modules/acpi/parameters/trace_method_name * /sys/modules/acpi/parameters/trace_state * /sys/modules/acpi/parameters/trace_debug_layer * /sys/modules/acpi/parameters/trace_debug_level */ 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), }; static int param_get_debug_layer(char *buffer, const 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, const 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; } static const struct kernel_param_ops param_ops_debug_layer = { .set = param_set_uint, .get = param_get_debug_layer, }; static const struct kernel_param_ops param_ops_debug_level = { .set = param_set_uint, .get = param_get_debug_level, }; module_param_cb(debug_layer, ¶m_ops_debug_layer, &acpi_dbg_layer, 0644); module_param_cb(debug_level, ¶m_ops_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); #endif /* CONFIG_ACPI_DEBUG */ /* /sys/modules/acpi/parameters/aml_debug_output */ module_param_named(aml_debug_output, acpi_gbl_enable_aml_debug_object, bool, 0644); MODULE_PARM_DESC(aml_debug_output, "To enable/disable the ACPI Debug Object output."); /* /sys/module/acpi/parameters/acpica_version */ static int param_get_acpica_version(char *buffer, struct kernel_param *kp) { int result; result = sprintf(buffer, "%x", ACPI_CA_VERSION); return result; } module_param_call(acpica_version, NULL, param_get_acpica_version, NULL, 0444); /* * ACPI table sysfs I/F: * /sys/firmware/acpi/tables/ * /sys/firmware/acpi/tables/dynamic/ */ static LIST_HEAD(acpi_table_attr_list); static struct kobject *tables_kobj; static struct kobject *dynamic_tables_kobj; struct acpi_table_attr { struct bin_attribute attr; char name[8]; int instance; struct list_head node; }; static ssize_t acpi_table_show(struct file *filp, struct kobject *kobj, struct bin_attribute *bin_attr, char *buf, loff_t offset, size_t count) { struct acpi_table_attr *table_attr = container_of(bin_attr, struct acpi_table_attr, attr); struct acpi_table_header *table_header = NULL; acpi_status status; char name[ACPI_NAME_SIZE]; if (strncmp(table_attr->name, "NULL", 4)) memcpy(name, table_attr->name, ACPI_NAME_SIZE); else memcpy(name, "\0\0\0\0", 4); status = acpi_get_table(name, table_attr->instance, &table_header); if (ACPI_FAILURE(status)) return -ENODEV; return memory_read_from_buffer(buf, count, &offset, table_header, table_header->length); } static void acpi_table_attr_init(struct acpi_table_attr *table_attr, struct acpi_table_header *table_header) { struct acpi_table_header *header = NULL; struct acpi_table_attr *attr = NULL; sysfs_attr_init(&table_attr->attr.attr); if (table_header->signature[0] != '\0') memcpy(table_attr->name, table_header->signature, ACPI_NAME_SIZE); else memcpy(table_attr->name, "NULL", 4); list_for_each_entry(attr, &acpi_table_attr_list, node) { if (!memcmp(table_attr->name, attr->name, ACPI_NAME_SIZE)) if (table_attr->instance < attr->instance) table_attr->instance = attr->instance; } table_attr->instance++; if (table_attr->instance > 1 || (table_attr->instance == 1 && !acpi_get_table (table_header->signature, 2, &header))) sprintf(table_attr->name + ACPI_NAME_SIZE, "%d", table_attr->instance); table_attr->attr.size = 0; table_attr->attr.read = acpi_table_show; table_attr->attr.attr.name = table_attr->name; table_attr->attr.attr.mode = 0400; return; } static acpi_status acpi_sysfs_table_handler(u32 event, void *table, void *context) { struct acpi_table_attr *table_attr; switch (event) { case ACPI_TABLE_EVENT_LOAD: table_attr = kzalloc(sizeof(struct acpi_table_attr), GFP_KERNEL); if (!table_attr) return AE_NO_MEMORY; acpi_table_attr_init(table_attr, table); if (sysfs_create_bin_file(dynamic_tables_kobj, &table_attr->attr)) { kfree(table_attr); return AE_ERROR; } else list_add_tail(&table_attr->node, &acpi_table_attr_list); break; case ACPI_TABLE_EVENT_UNLOAD: /* * we do not need to do anything right now * because the table is not deleted from the * global table list when unloading it. */ break; default: return AE_BAD_PARAMETER; } return AE_OK; } static int acpi_tables_sysfs_init(void) { struct acpi_table_attr *table_attr; struct acpi_table_header *table_header = NULL; int table_index = 0; int result; tables_kobj = kobject_create_and_add("tables", acpi_kobj); if (!tables_kobj) goto err; dynamic_tables_kobj = kobject_create_and_add("dynamic", tables_kobj); if (!dynamic_tables_kobj) goto err_dynamic_tables; do { result = acpi_get_table_by_index(table_index, &table_header); if (!result) { table_index++; table_attr = NULL; table_attr = kzalloc(sizeof(struct acpi_table_attr), GFP_KERNEL); if (!table_attr) return -ENOMEM; acpi_table_attr_init(table_attr, table_header); result = sysfs_create_bin_file(tables_kobj, &table_attr->attr); if (result) { kfree(table_attr); return result; } else list_add_tail(&table_attr->node, &acpi_table_attr_list); } } while (!result); kobject_uevent(tables_kobj, KOBJ_ADD); kobject_uevent(dynamic_tables_kobj, KOBJ_ADD); result = acpi_install_table_handler(acpi_sysfs_table_handler, NULL); return result == AE_OK ? 0 : -EINVAL; err_dynamic_tables: kobject_put(tables_kobj); err: return -ENOMEM; } /* * Detailed ACPI IRQ counters: * /sys/firmware/acpi/interrupts/ */ u32 acpi_irq_handled; u32 acpi_irq_not_handled; #define COUNT_GPE 0 #define COUNT_SCI 1 /* acpi_irq_handled */ #define COUNT_SCI_NOT 2 /* acpi_irq_not_handled */ #define COUNT_ERROR 3 /* other */ #define NUM_COUNTERS_EXTRA 4 struct event_counter { u32 count; u32 flags; }; static struct event_counter *all_counters; static u32 num_gpes; static u32 num_counters; static struct attribute **all_attrs; static u32 acpi_gpe_count; static struct attribute_group interrupt_stats_attr_group = { .name = "interrupts", }; static struct kobj_attribute *counter_attrs; static void delete_gpe_attr_array(void) { struct event_counter *tmp = all_counters; all_counters = NULL; kfree(tmp); if (counter_attrs) { int i; for (i = 0; i < num_gpes; i++) kfree(counter_attrs[i].attr.name); kfree(counter_attrs); } kfree(all_attrs); return; } static void gpe_count(u32 gpe_number) { acpi_gpe_count++; if (!all_counters) return; if (gpe_number < num_gpes) all_counters[gpe_number].count++; else all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR].count++; return; } static void fixed_event_count(u32 event_number) { if (!all_counters) return; if (event_number < ACPI_NUM_FIXED_EVENTS) all_counters[num_gpes + event_number].count++; else all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR].count++; return; } static void acpi_gbl_event_handler(u32 event_type, acpi_handle device, u32 event_number, void *context) { if (event_type == ACPI_EVENT_TYPE_GPE) gpe_count(event_number); if (event_type == ACPI_EVENT_TYPE_FIXED) fixed_event_count(event_number); } static int get_status(u32 index, acpi_event_status *status, acpi_handle *handle) { int result = 0; if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS) goto end; if (index < num_gpes) { result = acpi_get_gpe_device(index, handle); if (result) { ACPI_EXCEPTION((AE_INFO, AE_NOT_FOUND, "Invalid GPE 0x%x\n", index)); goto end; } result = acpi_get_gpe_status(*handle, index, status); } else if (index < (num_gpes + ACPI_NUM_FIXED_EVENTS)) result = acpi_get_event_status(index - num_gpes, status); end: return result; } static ssize_t counter_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf) { int index = attr - counter_attrs; int size; acpi_handle handle; acpi_event_status status; int result = 0; all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI].count = acpi_irq_handled; all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI_NOT].count = acpi_irq_not_handled; all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE].count = acpi_gpe_count; size = sprintf(buf, "%8d", all_counters[index].count); /* "gpe_all" or "sci" */ if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS) goto end; result = get_status(index, &status, &handle); if (result) goto end; if (!(status & ACPI_EVENT_FLAG_HANDLE)) size += sprintf(buf + size, " invalid"); else if (status & ACPI_EVENT_FLAG_ENABLED) size += sprintf(buf + size, " enabled"); else if (status & ACPI_EVENT_FLAG_WAKE_ENABLED) size += sprintf(buf + size, " wake_enabled"); else size += sprintf(buf + size, " disabled"); end: size += sprintf(buf + size, "\n"); return result ? result : size; } /* * counter_set() sets the specified counter. * setting the total "sci" file to any value clears all counters. * enable/disable/clear a gpe/fixed event in user space. */ static ssize_t counter_set(struct kobject *kobj, struct kobj_attribute *attr, const char *buf, size_t size) { int index = attr - counter_attrs; acpi_event_status status; acpi_handle handle; int result = 0; if (index == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI) { int i; for (i = 0; i < num_counters; ++i) all_counters[i].count = 0; acpi_gpe_count = 0; acpi_irq_handled = 0; acpi_irq_not_handled = 0; goto end; } /* show the event status for both GPEs and Fixed Events */ result = get_status(index, &status, &handle); if (result) goto end; if (!(status & ACPI_EVENT_FLAG_HANDLE)) { printk(KERN_WARNING PREFIX "Can not change Invalid GPE/Fixed Event status\n"); return -EINVAL; } if (index < num_gpes) { if (!strcmp(buf, "disable\n") && (status & ACPI_EVENT_FLAG_ENABLED)) result = acpi_disable_gpe(handle, index); else if (!strcmp(buf, "enable\n") && !(status & ACPI_EVENT_FLAG_ENABLED)) result = acpi_enable_gpe(handle, index); else if (!strcmp(buf, "clear\n") && (status & ACPI_EVENT_FLAG_SET)) result = acpi_clear_gpe(handle, index); else all_counters[index].count = strtoul(buf, NULL, 0); } else if (index < num_gpes + ACPI_NUM_FIXED_EVENTS) { int event = index - num_gpes; if (!strcmp(buf, "disable\n") && (status & ACPI_EVENT_FLAG_ENABLED)) result = acpi_disable_event(event, ACPI_NOT_ISR); else if (!strcmp(buf, "enable\n") && !(status & ACPI_EVENT_FLAG_ENABLED)) result = acpi_enable_event(event, ACPI_NOT_ISR); else if (!strcmp(buf, "clear\n") && (status & ACPI_EVENT_FLAG_SET)) result = acpi_clear_event(event); else all_counters[index].count = strtoul(buf, NULL, 0); } else all_counters[index].count = strtoul(buf, NULL, 0); if (ACPI_FAILURE(result)) result = -EINVAL; end: return result ? result : size; } void acpi_irq_stats_init(void) { acpi_status status; int i; if (all_counters) return; num_gpes = acpi_current_gpe_count; num_counters = num_gpes + ACPI_NUM_FIXED_EVENTS + NUM_COUNTERS_EXTRA; all_attrs = kzalloc(sizeof(struct attribute *) * (num_counters + 1), GFP_KERNEL); if (all_attrs == NULL) return; all_counters = kzalloc(sizeof(struct event_counter) * (num_counters), GFP_KERNEL); if (all_counters == NULL) goto fail; status = acpi_install_global_event_handler(acpi_gbl_event_handler, NULL); if (ACPI_FAILURE(status)) goto fail; counter_attrs = kzalloc(sizeof(struct kobj_attribute) * (num_counters), GFP_KERNEL); if (counter_attrs == NULL) goto fail; for (i = 0; i < num_counters; ++i) { char buffer[12]; char *name; if (i < num_gpes) sprintf(buffer, "gpe%02X", i); else if (i == num_gpes + ACPI_EVENT_PMTIMER) sprintf(buffer, "ff_pmtimer"); else if (i == num_gpes + ACPI_EVENT_GLOBAL) sprintf(buffer, "ff_gbl_lock"); else if (i == num_gpes + ACPI_EVENT_POWER_BUTTON) sprintf(buffer, "ff_pwr_btn"); else if (i == num_gpes + ACPI_EVENT_SLEEP_BUTTON) sprintf(buffer, "ff_slp_btn"); else if (i == num_gpes + ACPI_EVENT_RTC) sprintf(buffer, "ff_rt_clk"); else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE) sprintf(buffer, "gpe_all"); else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI) sprintf(buffer, "sci"); else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI_NOT) sprintf(buffer, "sci_not"); else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR) sprintf(buffer, "error"); else sprintf(buffer, "bug%02X", i); name = kzalloc(strlen(buffer) + 1, GFP_KERNEL); if (name == NULL) goto fail; strncpy(name, buffer, strlen(buffer) + 1); sysfs_attr_init(&counter_attrs[i].attr); counter_attrs[i].attr.name = name; counter_attrs[i].attr.mode = 0644; counter_attrs[i].show = counter_show; counter_attrs[i].store = counter_set; all_attrs[i] = &counter_attrs[i].attr; } interrupt_stats_attr_group.attrs = all_attrs; if (!sysfs_create_group(acpi_kobj, &interrupt_stats_attr_group)) return; fail: delete_gpe_attr_array(); return; } static void __exit interrupt_stats_exit(void) { sysfs_remove_group(acpi_kobj, &interrupt_stats_attr_group); delete_gpe_attr_array(); return; } static ssize_t acpi_show_profile(struct device *dev, struct device_attribute *attr, char *buf) { return sprintf(buf, "%d\n", acpi_gbl_FADT.preferred_profile); } static const struct device_attribute pm_profile_attr = __ATTR(pm_profile, S_IRUGO, acpi_show_profile, NULL); int __init acpi_sysfs_init(void) { int result; result = acpi_tables_sysfs_init(); if (result) return result; result = sysfs_create_file(acpi_kobj, &pm_profile_attr.attr); return result; }