/* * acpi_system.c - ACPI System Driver ($Revision: 63 $) * * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com> * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> * * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or (at * your option) any later version. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. * * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */ #include <linux/proc_fs.h> #include <linux/seq_file.h> #include <linux/init.h> #include <linux/string.h> #include <asm/uaccess.h> #include <acpi/acpi_drivers.h> #define _COMPONENT ACPI_SYSTEM_COMPONENT ACPI_MODULE_NAME("system"); #define ACPI_SYSTEM_CLASS "system" #define ACPI_SYSTEM_DEVICE_NAME "System" u32 acpi_irq_handled; u32 acpi_irq_not_handled; /* * Make ACPICA version work as module param */ 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); /* -------------------------------------------------------------------------- FS Interface (/sys) -------------------------------------------------------------------------- */ 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 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; 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_system_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 in /sys/firmware/acpi/interrupts/ * See Documentation/ABI/testing/sysfs-firmware-acpi */ #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, ACPI_NOT_ISR, 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, ACPI_NOT_ISR); 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); 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; } /* -------------------------------------------------------------------------- FS Interface (/proc) -------------------------------------------------------------------------- */ #ifdef CONFIG_ACPI_PROCFS #define ACPI_SYSTEM_FILE_INFO "info" #define ACPI_SYSTEM_FILE_EVENT "event" #define ACPI_SYSTEM_FILE_DSDT "dsdt" #define ACPI_SYSTEM_FILE_FADT "fadt" static int acpi_system_read_info(struct seq_file *seq, void *offset) { seq_printf(seq, "version: %x\n", ACPI_CA_VERSION); return 0; } static int acpi_system_info_open_fs(struct inode *inode, struct file *file) { return single_open(file, acpi_system_read_info, PDE(inode)->data); } static const struct file_operations acpi_system_info_ops = { .owner = THIS_MODULE, .open = acpi_system_info_open_fs, .read = seq_read, .llseek = seq_lseek, .release = single_release, }; static ssize_t acpi_system_read_dsdt(struct file *, char __user *, size_t, loff_t *); static const struct file_operations acpi_system_dsdt_ops = { .owner = THIS_MODULE, .read = acpi_system_read_dsdt, }; static ssize_t acpi_system_read_dsdt(struct file *file, char __user * buffer, size_t count, loff_t * ppos) { acpi_status status = AE_OK; struct acpi_table_header *dsdt = NULL; ssize_t res; status = acpi_get_table(ACPI_SIG_DSDT, 1, &dsdt); if (ACPI_FAILURE(status)) return -ENODEV; res = simple_read_from_buffer(buffer, count, ppos, dsdt, dsdt->length); return res; } static ssize_t acpi_system_read_fadt(struct file *, char __user *, size_t, loff_t *); static const struct file_operations acpi_system_fadt_ops = { .owner = THIS_MODULE, .read = acpi_system_read_fadt, }; static ssize_t acpi_system_read_fadt(struct file *file, char __user * buffer, size_t count, loff_t * ppos) { acpi_status status = AE_OK; struct acpi_table_header *fadt = NULL; ssize_t res; status = acpi_get_table(ACPI_SIG_FADT, 1, &fadt); if (ACPI_FAILURE(status)) return -ENODEV; res = simple_read_from_buffer(buffer, count, ppos, fadt, fadt->length); return res; } static int acpi_system_procfs_init(void) { struct proc_dir_entry *entry; int error = 0; /* 'info' [R] */ entry = proc_create(ACPI_SYSTEM_FILE_INFO, S_IRUGO, acpi_root_dir, &acpi_system_info_ops); if (!entry) goto Error; /* 'dsdt' [R] */ entry = proc_create(ACPI_SYSTEM_FILE_DSDT, S_IRUSR, acpi_root_dir, &acpi_system_dsdt_ops); if (!entry) goto Error; /* 'fadt' [R] */ entry = proc_create(ACPI_SYSTEM_FILE_FADT, S_IRUSR, acpi_root_dir, &acpi_system_fadt_ops); if (!entry) goto Error; Done: return error; Error: remove_proc_entry(ACPI_SYSTEM_FILE_FADT, acpi_root_dir); remove_proc_entry(ACPI_SYSTEM_FILE_DSDT, acpi_root_dir); remove_proc_entry(ACPI_SYSTEM_FILE_INFO, acpi_root_dir); error = -EFAULT; goto Done; } #else static int acpi_system_procfs_init(void) { return 0; } #endif int __init acpi_system_init(void) { int result; result = acpi_system_procfs_init(); if (result) return result; result = acpi_system_sysfs_init(); return result; }