2 * acpi_system.c - ACPI System Driver ($Revision: 63 $)
4 * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
5 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
7 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or (at
12 * your option) any later version.
14 * This program is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
19 * You should have received a copy of the GNU General Public License along
20 * with this program; if not, write to the Free Software Foundation, Inc.,
21 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
23 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
26 #include <linux/proc_fs.h>
27 #include <linux/seq_file.h>
28 #include <linux/slab.h>
29 #include <linux/init.h>
30 #include <linux/string.h>
31 #include <asm/uaccess.h>
33 #include <acpi/acpi_drivers.h>
35 #define PREFIX "ACPI: "
37 #define _COMPONENT ACPI_SYSTEM_COMPONENT
38 ACPI_MODULE_NAME("system");
40 #define ACPI_SYSTEM_CLASS "system"
41 #define ACPI_SYSTEM_DEVICE_NAME "System"
44 u32 acpi_irq_not_handled;
47 * Make ACPICA version work as module param
49 static int param_get_acpica_version(char *buffer, struct kernel_param *kp)
53 result = sprintf(buffer, "%x", ACPI_CA_VERSION);
58 module_param_call(acpica_version, NULL, param_get_acpica_version, NULL, 0444);
60 /* --------------------------------------------------------------------------
62 -------------------------------------------------------------------------- */
63 static LIST_HEAD(acpi_table_attr_list);
64 static struct kobject *tables_kobj;
65 static struct kobject *dynamic_tables_kobj;
67 struct acpi_table_attr {
68 struct bin_attribute attr;
71 struct list_head node;
74 static ssize_t acpi_table_show(struct kobject *kobj,
75 struct bin_attribute *bin_attr, char *buf,
76 loff_t offset, size_t count)
78 struct acpi_table_attr *table_attr =
79 container_of(bin_attr, struct acpi_table_attr, attr);
80 struct acpi_table_header *table_header = NULL;
82 char name[ACPI_NAME_SIZE];
84 if (strncmp(table_attr->name, "NULL", 4))
85 memcpy(name, table_attr->name, ACPI_NAME_SIZE);
87 memcpy(name, "\0\0\0\0", 4);
90 acpi_get_table(name, table_attr->instance,
92 if (ACPI_FAILURE(status))
95 return memory_read_from_buffer(buf, count, &offset,
96 table_header, table_header->length);
99 static void acpi_table_attr_init(struct acpi_table_attr *table_attr,
100 struct acpi_table_header *table_header)
102 struct acpi_table_header *header = NULL;
103 struct acpi_table_attr *attr = NULL;
105 sysfs_attr_init(&table_attr->attr.attr);
106 if (table_header->signature[0] != '\0')
107 memcpy(table_attr->name, table_header->signature,
110 memcpy(table_attr->name, "NULL", 4);
112 list_for_each_entry(attr, &acpi_table_attr_list, node) {
113 if (!memcmp(table_attr->name, attr->name, ACPI_NAME_SIZE))
114 if (table_attr->instance < attr->instance)
115 table_attr->instance = attr->instance;
117 table_attr->instance++;
119 if (table_attr->instance > 1 || (table_attr->instance == 1 &&
121 (table_header->signature, 2, &header)))
122 sprintf(table_attr->name + ACPI_NAME_SIZE, "%d",
123 table_attr->instance);
125 table_attr->attr.size = 0;
126 table_attr->attr.read = acpi_table_show;
127 table_attr->attr.attr.name = table_attr->name;
128 table_attr->attr.attr.mode = 0400;
134 acpi_sysfs_table_handler(u32 event, void *table, void *context)
136 struct acpi_table_attr *table_attr;
139 case ACPI_TABLE_EVENT_LOAD:
141 kzalloc(sizeof(struct acpi_table_attr), GFP_KERNEL);
145 acpi_table_attr_init(table_attr, table);
146 if (sysfs_create_bin_file(dynamic_tables_kobj,
147 &table_attr->attr)) {
151 list_add_tail(&table_attr->node,
152 &acpi_table_attr_list);
154 case ACPI_TABLE_EVENT_UNLOAD:
156 * we do not need to do anything right now
157 * because the table is not deleted from the
158 * global table list when unloading it.
162 return AE_BAD_PARAMETER;
167 static int acpi_system_sysfs_init(void)
169 struct acpi_table_attr *table_attr;
170 struct acpi_table_header *table_header = NULL;
174 tables_kobj = kobject_create_and_add("tables", acpi_kobj);
178 dynamic_tables_kobj = kobject_create_and_add("dynamic", tables_kobj);
179 if (!dynamic_tables_kobj)
180 goto err_dynamic_tables;
183 result = acpi_get_table_by_index(table_index, &table_header);
188 kzalloc(sizeof(struct acpi_table_attr), GFP_KERNEL);
192 acpi_table_attr_init(table_attr, table_header);
194 sysfs_create_bin_file(tables_kobj,
200 list_add_tail(&table_attr->node,
201 &acpi_table_attr_list);
204 kobject_uevent(tables_kobj, KOBJ_ADD);
205 kobject_uevent(dynamic_tables_kobj, KOBJ_ADD);
206 result = acpi_install_table_handler(acpi_sysfs_table_handler, NULL);
208 return result == AE_OK ? 0 : -EINVAL;
210 kobject_put(tables_kobj);
216 * Detailed ACPI IRQ counters in /sys/firmware/acpi/interrupts/
217 * See Documentation/ABI/testing/sysfs-firmware-acpi
221 #define COUNT_SCI 1 /* acpi_irq_handled */
222 #define COUNT_SCI_NOT 2 /* acpi_irq_not_handled */
223 #define COUNT_ERROR 3 /* other */
224 #define NUM_COUNTERS_EXTRA 4
226 struct event_counter {
231 static struct event_counter *all_counters;
233 static u32 num_counters;
234 static struct attribute **all_attrs;
235 static u32 acpi_gpe_count;
237 static struct attribute_group interrupt_stats_attr_group = {
238 .name = "interrupts",
240 static struct kobj_attribute *counter_attrs;
242 static void delete_gpe_attr_array(void)
244 struct event_counter *tmp = all_counters;
252 for (i = 0; i < num_gpes; i++)
253 kfree(counter_attrs[i].attr.name);
255 kfree(counter_attrs);
262 void acpi_os_gpe_count(u32 gpe_number)
269 if (gpe_number < num_gpes)
270 all_counters[gpe_number].count++;
272 all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR].
278 void acpi_os_fixed_event_count(u32 event_number)
283 if (event_number < ACPI_NUM_FIXED_EVENTS)
284 all_counters[num_gpes + event_number].count++;
286 all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR].
292 static int get_status(u32 index, acpi_event_status *status, acpi_handle *handle)
296 if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS)
299 if (index < num_gpes) {
300 result = acpi_get_gpe_device(index, handle);
302 ACPI_EXCEPTION((AE_INFO, AE_NOT_FOUND,
303 "Invalid GPE 0x%x\n", index));
306 result = acpi_get_gpe_status(*handle, index, status);
307 } else if (index < (num_gpes + ACPI_NUM_FIXED_EVENTS))
308 result = acpi_get_event_status(index - num_gpes, status);
314 static ssize_t counter_show(struct kobject *kobj,
315 struct kobj_attribute *attr, char *buf)
317 int index = attr - counter_attrs;
320 acpi_event_status status;
323 all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI].count =
325 all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI_NOT].count =
326 acpi_irq_not_handled;
327 all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE].count =
330 size = sprintf(buf, "%8d", all_counters[index].count);
332 /* "gpe_all" or "sci" */
333 if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS)
336 result = get_status(index, &status, &handle);
340 if (!(status & ACPI_EVENT_FLAG_HANDLE))
341 size += sprintf(buf + size, " invalid");
342 else if (status & ACPI_EVENT_FLAG_ENABLED)
343 size += sprintf(buf + size, " enabled");
344 else if (status & ACPI_EVENT_FLAG_WAKE_ENABLED)
345 size += sprintf(buf + size, " wake_enabled");
347 size += sprintf(buf + size, " disabled");
350 size += sprintf(buf + size, "\n");
351 return result ? result : size;
355 * counter_set() sets the specified counter.
356 * setting the total "sci" file to any value clears all counters.
357 * enable/disable/clear a gpe/fixed event in user space.
359 static ssize_t counter_set(struct kobject *kobj,
360 struct kobj_attribute *attr, const char *buf, size_t size)
362 int index = attr - counter_attrs;
363 acpi_event_status status;
367 if (index == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI) {
369 for (i = 0; i < num_counters; ++i)
370 all_counters[i].count = 0;
372 acpi_irq_handled = 0;
373 acpi_irq_not_handled = 0;
377 /* show the event status for both GPEs and Fixed Events */
378 result = get_status(index, &status, &handle);
382 if (!(status & ACPI_EVENT_FLAG_HANDLE)) {
383 printk(KERN_WARNING PREFIX
384 "Can not change Invalid GPE/Fixed Event status\n");
388 if (index < num_gpes) {
389 if (!strcmp(buf, "disable\n") &&
390 (status & ACPI_EVENT_FLAG_ENABLED))
391 result = acpi_set_gpe(handle, index, ACPI_GPE_DISABLE);
392 else if (!strcmp(buf, "enable\n") &&
393 !(status & ACPI_EVENT_FLAG_ENABLED))
394 result = acpi_set_gpe(handle, index, ACPI_GPE_ENABLE);
395 else if (!strcmp(buf, "clear\n") &&
396 (status & ACPI_EVENT_FLAG_SET))
397 result = acpi_clear_gpe(handle, index);
399 all_counters[index].count = strtoul(buf, NULL, 0);
400 } else if (index < num_gpes + ACPI_NUM_FIXED_EVENTS) {
401 int event = index - num_gpes;
402 if (!strcmp(buf, "disable\n") &&
403 (status & ACPI_EVENT_FLAG_ENABLED))
404 result = acpi_disable_event(event, ACPI_NOT_ISR);
405 else if (!strcmp(buf, "enable\n") &&
406 !(status & ACPI_EVENT_FLAG_ENABLED))
407 result = acpi_enable_event(event, ACPI_NOT_ISR);
408 else if (!strcmp(buf, "clear\n") &&
409 (status & ACPI_EVENT_FLAG_SET))
410 result = acpi_clear_event(event);
412 all_counters[index].count = strtoul(buf, NULL, 0);
414 all_counters[index].count = strtoul(buf, NULL, 0);
416 if (ACPI_FAILURE(result))
419 return result ? result : size;
422 void acpi_irq_stats_init(void)
429 num_gpes = acpi_current_gpe_count;
430 num_counters = num_gpes + ACPI_NUM_FIXED_EVENTS + NUM_COUNTERS_EXTRA;
432 all_attrs = kzalloc(sizeof(struct attribute *) * (num_counters + 1),
434 if (all_attrs == NULL)
437 all_counters = kzalloc(sizeof(struct event_counter) * (num_counters),
439 if (all_counters == NULL)
442 counter_attrs = kzalloc(sizeof(struct kobj_attribute) * (num_counters),
444 if (counter_attrs == NULL)
447 for (i = 0; i < num_counters; ++i) {
452 sprintf(buffer, "gpe%02X", i);
453 else if (i == num_gpes + ACPI_EVENT_PMTIMER)
454 sprintf(buffer, "ff_pmtimer");
455 else if (i == num_gpes + ACPI_EVENT_GLOBAL)
456 sprintf(buffer, "ff_gbl_lock");
457 else if (i == num_gpes + ACPI_EVENT_POWER_BUTTON)
458 sprintf(buffer, "ff_pwr_btn");
459 else if (i == num_gpes + ACPI_EVENT_SLEEP_BUTTON)
460 sprintf(buffer, "ff_slp_btn");
461 else if (i == num_gpes + ACPI_EVENT_RTC)
462 sprintf(buffer, "ff_rt_clk");
463 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE)
464 sprintf(buffer, "gpe_all");
465 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI)
466 sprintf(buffer, "sci");
467 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI_NOT)
468 sprintf(buffer, "sci_not");
469 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR)
470 sprintf(buffer, "error");
472 sprintf(buffer, "bug%02X", i);
474 name = kzalloc(strlen(buffer) + 1, GFP_KERNEL);
477 strncpy(name, buffer, strlen(buffer) + 1);
479 sysfs_attr_init(&counter_attrs[i].attr);
480 counter_attrs[i].attr.name = name;
481 counter_attrs[i].attr.mode = 0644;
482 counter_attrs[i].show = counter_show;
483 counter_attrs[i].store = counter_set;
485 all_attrs[i] = &counter_attrs[i].attr;
488 interrupt_stats_attr_group.attrs = all_attrs;
489 if (!sysfs_create_group(acpi_kobj, &interrupt_stats_attr_group))
493 delete_gpe_attr_array();
497 static void __exit interrupt_stats_exit(void)
499 sysfs_remove_group(acpi_kobj, &interrupt_stats_attr_group);
501 delete_gpe_attr_array();
506 /* --------------------------------------------------------------------------
508 -------------------------------------------------------------------------- */
509 #ifdef CONFIG_ACPI_PROCFS
510 #define ACPI_SYSTEM_FILE_INFO "info"
511 #define ACPI_SYSTEM_FILE_EVENT "event"
512 #define ACPI_SYSTEM_FILE_DSDT "dsdt"
513 #define ACPI_SYSTEM_FILE_FADT "fadt"
515 static int acpi_system_read_info(struct seq_file *seq, void *offset)
518 seq_printf(seq, "version: %x\n", ACPI_CA_VERSION);
522 static int acpi_system_info_open_fs(struct inode *inode, struct file *file)
524 return single_open(file, acpi_system_read_info, PDE(inode)->data);
527 static const struct file_operations acpi_system_info_ops = {
528 .owner = THIS_MODULE,
529 .open = acpi_system_info_open_fs,
532 .release = single_release,
535 static ssize_t acpi_system_read_dsdt(struct file *, char __user *, size_t,
538 static const struct file_operations acpi_system_dsdt_ops = {
539 .owner = THIS_MODULE,
540 .read = acpi_system_read_dsdt,
544 acpi_system_read_dsdt(struct file *file,
545 char __user * buffer, size_t count, loff_t * ppos)
547 acpi_status status = AE_OK;
548 struct acpi_table_header *dsdt = NULL;
551 status = acpi_get_table(ACPI_SIG_DSDT, 1, &dsdt);
552 if (ACPI_FAILURE(status))
555 res = simple_read_from_buffer(buffer, count, ppos, dsdt, dsdt->length);
560 static ssize_t acpi_system_read_fadt(struct file *, char __user *, size_t,
563 static const struct file_operations acpi_system_fadt_ops = {
564 .owner = THIS_MODULE,
565 .read = acpi_system_read_fadt,
569 acpi_system_read_fadt(struct file *file,
570 char __user * buffer, size_t count, loff_t * ppos)
572 acpi_status status = AE_OK;
573 struct acpi_table_header *fadt = NULL;
576 status = acpi_get_table(ACPI_SIG_FADT, 1, &fadt);
577 if (ACPI_FAILURE(status))
580 res = simple_read_from_buffer(buffer, count, ppos, fadt, fadt->length);
585 static int acpi_system_procfs_init(void)
587 struct proc_dir_entry *entry;
591 entry = proc_create(ACPI_SYSTEM_FILE_INFO, S_IRUGO, acpi_root_dir,
592 &acpi_system_info_ops);
597 entry = proc_create(ACPI_SYSTEM_FILE_DSDT, S_IRUSR, acpi_root_dir,
598 &acpi_system_dsdt_ops);
603 entry = proc_create(ACPI_SYSTEM_FILE_FADT, S_IRUSR, acpi_root_dir,
604 &acpi_system_fadt_ops);
612 remove_proc_entry(ACPI_SYSTEM_FILE_FADT, acpi_root_dir);
613 remove_proc_entry(ACPI_SYSTEM_FILE_DSDT, acpi_root_dir);
614 remove_proc_entry(ACPI_SYSTEM_FILE_INFO, acpi_root_dir);
620 static int acpi_system_procfs_init(void)
626 int __init acpi_system_init(void)
630 result = acpi_system_procfs_init();
634 result = acpi_system_sysfs_init();