0f849d2cc6
We have ported Rafael's major GPE changes (ACPI: Use GPE reference counting to support shared GPEs) into ACPICA code base. But the port and Rafael's original patch have some differences, so we made below patch to make linux GPE code consistent with ACPICA code base. Most changes are about comments and coding styles. Other noticeable changes are based on: Rafael: Reduce code duplication related to GPE lookup https://patchwork.kernel.org/patch/86237/ Rafael: Always use the same lock for GPE locking https://patchwork.kernel.org/patch/90471/ A new field gpe_count in struct acpi_gpe_block_info to record the number of individual GPEs in block. Rename acpi_ev_save_method_info to acpi_ev_match_gpe_method. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Robert Moore <robert.moore@intel.com> Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
638 lines
16 KiB
C
638 lines
16 KiB
C
/*
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* acpi_system.c - ACPI System Driver ($Revision: 63 $)
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*
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* Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
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* Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or (at
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* your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*/
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#include <linux/proc_fs.h>
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#include <linux/seq_file.h>
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#include <linux/slab.h>
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#include <linux/init.h>
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#include <linux/string.h>
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#include <asm/uaccess.h>
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#include <acpi/acpi_drivers.h>
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#define PREFIX "ACPI: "
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#define _COMPONENT ACPI_SYSTEM_COMPONENT
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ACPI_MODULE_NAME("system");
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#define ACPI_SYSTEM_CLASS "system"
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#define ACPI_SYSTEM_DEVICE_NAME "System"
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u32 acpi_irq_handled;
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u32 acpi_irq_not_handled;
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/*
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* Make ACPICA version work as module param
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*/
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static int param_get_acpica_version(char *buffer, struct kernel_param *kp)
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{
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int result;
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result = sprintf(buffer, "%x", ACPI_CA_VERSION);
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return result;
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}
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module_param_call(acpica_version, NULL, param_get_acpica_version, NULL, 0444);
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/* --------------------------------------------------------------------------
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FS Interface (/sys)
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-------------------------------------------------------------------------- */
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static LIST_HEAD(acpi_table_attr_list);
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static struct kobject *tables_kobj;
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static struct kobject *dynamic_tables_kobj;
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struct acpi_table_attr {
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struct bin_attribute attr;
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char name[8];
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int instance;
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struct list_head node;
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};
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static ssize_t acpi_table_show(struct kobject *kobj,
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struct bin_attribute *bin_attr, char *buf,
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loff_t offset, size_t count)
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{
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struct acpi_table_attr *table_attr =
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container_of(bin_attr, struct acpi_table_attr, attr);
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struct acpi_table_header *table_header = NULL;
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acpi_status status;
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char name[ACPI_NAME_SIZE];
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if (strncmp(table_attr->name, "NULL", 4))
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memcpy(name, table_attr->name, ACPI_NAME_SIZE);
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else
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memcpy(name, "\0\0\0\0", 4);
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status =
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acpi_get_table(name, table_attr->instance,
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&table_header);
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if (ACPI_FAILURE(status))
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return -ENODEV;
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return memory_read_from_buffer(buf, count, &offset,
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table_header, table_header->length);
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}
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static void acpi_table_attr_init(struct acpi_table_attr *table_attr,
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struct acpi_table_header *table_header)
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{
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struct acpi_table_header *header = NULL;
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struct acpi_table_attr *attr = NULL;
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sysfs_attr_init(&table_attr->attr.attr);
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if (table_header->signature[0] != '\0')
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memcpy(table_attr->name, table_header->signature,
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ACPI_NAME_SIZE);
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else
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memcpy(table_attr->name, "NULL", 4);
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list_for_each_entry(attr, &acpi_table_attr_list, node) {
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if (!memcmp(table_attr->name, attr->name, ACPI_NAME_SIZE))
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if (table_attr->instance < attr->instance)
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table_attr->instance = attr->instance;
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}
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table_attr->instance++;
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if (table_attr->instance > 1 || (table_attr->instance == 1 &&
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!acpi_get_table
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(table_header->signature, 2, &header)))
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sprintf(table_attr->name + ACPI_NAME_SIZE, "%d",
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table_attr->instance);
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table_attr->attr.size = 0;
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table_attr->attr.read = acpi_table_show;
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table_attr->attr.attr.name = table_attr->name;
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table_attr->attr.attr.mode = 0400;
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return;
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}
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static acpi_status
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acpi_sysfs_table_handler(u32 event, void *table, void *context)
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{
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struct acpi_table_attr *table_attr;
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switch (event) {
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case ACPI_TABLE_EVENT_LOAD:
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table_attr =
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kzalloc(sizeof(struct acpi_table_attr), GFP_KERNEL);
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if (!table_attr)
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return AE_NO_MEMORY;
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acpi_table_attr_init(table_attr, table);
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if (sysfs_create_bin_file(dynamic_tables_kobj,
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&table_attr->attr)) {
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kfree(table_attr);
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return AE_ERROR;
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} else
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list_add_tail(&table_attr->node,
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&acpi_table_attr_list);
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break;
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case ACPI_TABLE_EVENT_UNLOAD:
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/*
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* we do not need to do anything right now
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* because the table is not deleted from the
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* global table list when unloading it.
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*/
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break;
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default:
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return AE_BAD_PARAMETER;
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}
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return AE_OK;
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}
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static int acpi_system_sysfs_init(void)
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{
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struct acpi_table_attr *table_attr;
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struct acpi_table_header *table_header = NULL;
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int table_index = 0;
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int result;
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tables_kobj = kobject_create_and_add("tables", acpi_kobj);
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if (!tables_kobj)
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goto err;
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dynamic_tables_kobj = kobject_create_and_add("dynamic", tables_kobj);
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if (!dynamic_tables_kobj)
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goto err_dynamic_tables;
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do {
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result = acpi_get_table_by_index(table_index, &table_header);
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if (!result) {
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table_index++;
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table_attr = NULL;
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table_attr =
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kzalloc(sizeof(struct acpi_table_attr), GFP_KERNEL);
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if (!table_attr)
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return -ENOMEM;
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acpi_table_attr_init(table_attr, table_header);
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result =
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sysfs_create_bin_file(tables_kobj,
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&table_attr->attr);
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if (result) {
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kfree(table_attr);
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return result;
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} else
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list_add_tail(&table_attr->node,
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&acpi_table_attr_list);
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}
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} while (!result);
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kobject_uevent(tables_kobj, KOBJ_ADD);
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kobject_uevent(dynamic_tables_kobj, KOBJ_ADD);
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result = acpi_install_table_handler(acpi_sysfs_table_handler, NULL);
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return result == AE_OK ? 0 : -EINVAL;
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err_dynamic_tables:
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kobject_put(tables_kobj);
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err:
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return -ENOMEM;
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}
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/*
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* Detailed ACPI IRQ counters in /sys/firmware/acpi/interrupts/
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* See Documentation/ABI/testing/sysfs-firmware-acpi
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*/
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#define COUNT_GPE 0
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#define COUNT_SCI 1 /* acpi_irq_handled */
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#define COUNT_SCI_NOT 2 /* acpi_irq_not_handled */
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#define COUNT_ERROR 3 /* other */
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#define NUM_COUNTERS_EXTRA 4
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struct event_counter {
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u32 count;
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u32 flags;
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};
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static struct event_counter *all_counters;
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static u32 num_gpes;
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static u32 num_counters;
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static struct attribute **all_attrs;
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static u32 acpi_gpe_count;
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static struct attribute_group interrupt_stats_attr_group = {
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.name = "interrupts",
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};
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static struct kobj_attribute *counter_attrs;
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static void delete_gpe_attr_array(void)
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{
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struct event_counter *tmp = all_counters;
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all_counters = NULL;
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kfree(tmp);
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if (counter_attrs) {
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int i;
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for (i = 0; i < num_gpes; i++)
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kfree(counter_attrs[i].attr.name);
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kfree(counter_attrs);
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}
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kfree(all_attrs);
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return;
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}
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void acpi_os_gpe_count(u32 gpe_number)
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{
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acpi_gpe_count++;
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if (!all_counters)
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return;
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if (gpe_number < num_gpes)
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all_counters[gpe_number].count++;
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else
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all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR].
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count++;
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return;
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}
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void acpi_os_fixed_event_count(u32 event_number)
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{
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if (!all_counters)
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return;
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if (event_number < ACPI_NUM_FIXED_EVENTS)
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all_counters[num_gpes + event_number].count++;
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else
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all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR].
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count++;
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return;
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}
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static int get_status(u32 index, acpi_event_status *status, acpi_handle *handle)
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{
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int result = 0;
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if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS)
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goto end;
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if (index < num_gpes) {
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result = acpi_get_gpe_device(index, handle);
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if (result) {
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ACPI_EXCEPTION((AE_INFO, AE_NOT_FOUND,
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"Invalid GPE 0x%x\n", index));
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goto end;
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}
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result = acpi_get_gpe_status(*handle, index, status);
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} else if (index < (num_gpes + ACPI_NUM_FIXED_EVENTS))
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result = acpi_get_event_status(index - num_gpes, status);
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end:
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return result;
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}
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static ssize_t counter_show(struct kobject *kobj,
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struct kobj_attribute *attr, char *buf)
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{
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int index = attr - counter_attrs;
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int size;
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acpi_handle handle;
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acpi_event_status status;
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int result = 0;
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all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI].count =
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acpi_irq_handled;
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all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI_NOT].count =
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acpi_irq_not_handled;
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all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE].count =
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acpi_gpe_count;
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size = sprintf(buf, "%8d", all_counters[index].count);
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/* "gpe_all" or "sci" */
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if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS)
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goto end;
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result = get_status(index, &status, &handle);
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if (result)
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goto end;
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if (!(status & ACPI_EVENT_FLAG_HANDLE))
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size += sprintf(buf + size, " invalid");
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else if (status & ACPI_EVENT_FLAG_ENABLED)
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size += sprintf(buf + size, " enabled");
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else if (status & ACPI_EVENT_FLAG_WAKE_ENABLED)
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size += sprintf(buf + size, " wake_enabled");
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else
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size += sprintf(buf + size, " disabled");
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end:
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size += sprintf(buf + size, "\n");
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return result ? result : size;
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}
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/*
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* counter_set() sets the specified counter.
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* setting the total "sci" file to any value clears all counters.
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* enable/disable/clear a gpe/fixed event in user space.
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*/
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static ssize_t counter_set(struct kobject *kobj,
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struct kobj_attribute *attr, const char *buf, size_t size)
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{
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int index = attr - counter_attrs;
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acpi_event_status status;
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acpi_handle handle;
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int result = 0;
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if (index == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI) {
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int i;
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for (i = 0; i < num_counters; ++i)
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all_counters[i].count = 0;
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acpi_gpe_count = 0;
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acpi_irq_handled = 0;
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acpi_irq_not_handled = 0;
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goto end;
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}
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/* show the event status for both GPEs and Fixed Events */
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result = get_status(index, &status, &handle);
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if (result)
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goto end;
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if (!(status & ACPI_EVENT_FLAG_HANDLE)) {
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printk(KERN_WARNING PREFIX
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"Can not change Invalid GPE/Fixed Event status\n");
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return -EINVAL;
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}
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if (index < num_gpes) {
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if (!strcmp(buf, "disable\n") &&
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(status & ACPI_EVENT_FLAG_ENABLED))
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result = acpi_set_gpe(handle, index, ACPI_GPE_DISABLE);
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else if (!strcmp(buf, "enable\n") &&
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!(status & ACPI_EVENT_FLAG_ENABLED))
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result = acpi_set_gpe(handle, index, ACPI_GPE_ENABLE);
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else if (!strcmp(buf, "clear\n") &&
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(status & ACPI_EVENT_FLAG_SET))
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result = acpi_clear_gpe(handle, index);
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else
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all_counters[index].count = strtoul(buf, NULL, 0);
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} else if (index < num_gpes + ACPI_NUM_FIXED_EVENTS) {
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int event = index - num_gpes;
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if (!strcmp(buf, "disable\n") &&
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(status & ACPI_EVENT_FLAG_ENABLED))
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result = acpi_disable_event(event, ACPI_NOT_ISR);
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else if (!strcmp(buf, "enable\n") &&
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!(status & ACPI_EVENT_FLAG_ENABLED))
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result = acpi_enable_event(event, ACPI_NOT_ISR);
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else if (!strcmp(buf, "clear\n") &&
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(status & ACPI_EVENT_FLAG_SET))
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result = acpi_clear_event(event);
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else
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all_counters[index].count = strtoul(buf, NULL, 0);
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} else
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all_counters[index].count = strtoul(buf, NULL, 0);
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if (ACPI_FAILURE(result))
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result = -EINVAL;
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end:
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return result ? result : size;
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}
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void acpi_irq_stats_init(void)
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{
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int i;
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if (all_counters)
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return;
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num_gpes = acpi_current_gpe_count;
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num_counters = num_gpes + ACPI_NUM_FIXED_EVENTS + NUM_COUNTERS_EXTRA;
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all_attrs = kzalloc(sizeof(struct attribute *) * (num_counters + 1),
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GFP_KERNEL);
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if (all_attrs == NULL)
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return;
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all_counters = kzalloc(sizeof(struct event_counter) * (num_counters),
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GFP_KERNEL);
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if (all_counters == NULL)
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goto fail;
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counter_attrs = kzalloc(sizeof(struct kobj_attribute) * (num_counters),
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GFP_KERNEL);
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if (counter_attrs == NULL)
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goto fail;
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for (i = 0; i < num_counters; ++i) {
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char buffer[12];
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char *name;
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if (i < num_gpes)
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sprintf(buffer, "gpe%02X", i);
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else if (i == num_gpes + ACPI_EVENT_PMTIMER)
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sprintf(buffer, "ff_pmtimer");
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else if (i == num_gpes + ACPI_EVENT_GLOBAL)
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sprintf(buffer, "ff_gbl_lock");
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else if (i == num_gpes + ACPI_EVENT_POWER_BUTTON)
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sprintf(buffer, "ff_pwr_btn");
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else if (i == num_gpes + ACPI_EVENT_SLEEP_BUTTON)
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sprintf(buffer, "ff_slp_btn");
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else if (i == num_gpes + ACPI_EVENT_RTC)
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sprintf(buffer, "ff_rt_clk");
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else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE)
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sprintf(buffer, "gpe_all");
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else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI)
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sprintf(buffer, "sci");
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else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI_NOT)
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sprintf(buffer, "sci_not");
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else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR)
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sprintf(buffer, "error");
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else
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sprintf(buffer, "bug%02X", i);
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name = kzalloc(strlen(buffer) + 1, GFP_KERNEL);
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if (name == NULL)
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goto fail;
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strncpy(name, buffer, strlen(buffer) + 1);
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sysfs_attr_init(&counter_attrs[i].attr);
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counter_attrs[i].attr.name = name;
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counter_attrs[i].attr.mode = 0644;
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counter_attrs[i].show = counter_show;
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counter_attrs[i].store = counter_set;
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all_attrs[i] = &counter_attrs[i].attr;
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}
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interrupt_stats_attr_group.attrs = all_attrs;
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if (!sysfs_create_group(acpi_kobj, &interrupt_stats_attr_group))
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return;
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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;
|
|
}
|