ACPI: introduce drivers/acpi/sysfs.c

Introduce drivers/acpi/sysfs.c.

code for ACPI sysfs I/F, including
#ifdef ACPI_DEBUG
/sys/module/acpi/parameters/debug_layer
/sys/module/acpi/parameters/debug_level
/sys/module/acpi/parameters/trace_method_name
/sys/module/acpi/parameters/trace_debug_layer
/sys/module/acpi/parameters/trace_debug_level
/sys/module/acpi/parameters/trace_state
#endif
/sys/module/acpi/parameters/acpica_version
/sys/firmware/acpi/tables/
/sys/firmware/acpi/interrupts/
is moved to this file.

No function change in this patch.

Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>

1 files changed, 685 insertions, 0 deletions

diff --git a/drivers/acpi/sysfs.c b/drivers/acpi/sysfs.c
new file mode 100644
index 000000000000..68e2e4582fa2
--- /dev/null
+++ b/drivers/acpi/sysfs.c
@@ -0,0 +1,685 @@
+/*
+ * 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, 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);
+#endif /* CONFIG_ACPI_DEBUG */
+
+/* /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;
+}
+
+void acpi_os_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;
+}
+
+void acpi_os_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 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)
+{
+        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;
+
+        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;
+}
+
+int __init acpi_sysfs_init(void)
+{
+        int result;
+
+        result = acpi_tables_sysfs_init();
+
+        return result;
+}