1// SPDX-License-Identifier: GPL-2.0-only
 2/*
 3 * ACPI Hardware Error Device (PNP0C33) Driver
 4 *
 5 * Copyright (C) 2010, Intel Corp.
 6 *	Author: Huang Ying <ying.huang@intel.com>
 7 *
 8 * ACPI Hardware Error Device is used to report some hardware errors
 9 * notified via SCI, mainly the corrected errors.
 
 
 
 
 
 
 
 
 
 
 
 
 
10 */
11
12#include <linux/kernel.h>
13#include <linux/module.h>
14#include <linux/init.h>
15#include <linux/acpi.h>
16#include <acpi/hed.h>
17
18static const struct acpi_device_id acpi_hed_ids[] = {
19	{"PNP0C33", 0},
20	{"", 0},
21};
22MODULE_DEVICE_TABLE(acpi, acpi_hed_ids);
23
24static acpi_handle hed_handle;
25
26static BLOCKING_NOTIFIER_HEAD(acpi_hed_notify_list);
27
28int register_acpi_hed_notifier(struct notifier_block *nb)
29{
30	return blocking_notifier_chain_register(&acpi_hed_notify_list, nb);
31}
32EXPORT_SYMBOL_GPL(register_acpi_hed_notifier);
33
34void unregister_acpi_hed_notifier(struct notifier_block *nb)
35{
36	blocking_notifier_chain_unregister(&acpi_hed_notify_list, nb);
37}
38EXPORT_SYMBOL_GPL(unregister_acpi_hed_notifier);
39
40/*
41 * SCI to report hardware error is forwarded to the listeners of HED,
42 * it is used by HEST Generic Hardware Error Source with notify type
43 * SCI.
44 */
45static void acpi_hed_notify(struct acpi_device *device, u32 event)
46{
47	blocking_notifier_call_chain(&acpi_hed_notify_list, 0, NULL);
48}
49
50static int acpi_hed_add(struct acpi_device *device)
51{
52	/* Only one hardware error device */
53	if (hed_handle)
54		return -EINVAL;
55	hed_handle = device->handle;
56	return 0;
57}
58
59static int acpi_hed_remove(struct acpi_device *device)
60{
61	hed_handle = NULL;
62	return 0;
63}
64
65static struct acpi_driver acpi_hed_driver = {
66	.name = "hardware_error_device",
67	.class = "hardware_error",
68	.ids = acpi_hed_ids,
69	.ops = {
70		.add = acpi_hed_add,
71		.remove = acpi_hed_remove,
72		.notify = acpi_hed_notify,
73	},
74};
75module_acpi_driver(acpi_hed_driver);
76
77ACPI_MODULE_NAME("hed");
78MODULE_AUTHOR("Huang Ying");
79MODULE_DESCRIPTION("ACPI Hardware Error Device Driver");
80MODULE_LICENSE("GPL");

 
 1/*
 2 * ACPI Hardware Error Device (PNP0C33) Driver
 3 *
 4 * Copyright (C) 2010, Intel Corp.
 5 *	Author: Huang Ying <ying.huang@intel.com>
 6 *
 7 * ACPI Hardware Error Device is used to report some hardware errors
 8 * notified via SCI, mainly the corrected errors.
 9 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License version
12 * 2 as published by the Free Software Foundation;
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
22 */
23
24#include <linux/kernel.h>
25#include <linux/module.h>
26#include <linux/init.h>
27#include <linux/acpi.h>
28#include <acpi/hed.h>
29
30static struct acpi_device_id acpi_hed_ids[] = {
31	{"PNP0C33", 0},
32	{"", 0},
33};
34MODULE_DEVICE_TABLE(acpi, acpi_hed_ids);
35
36static acpi_handle hed_handle;
37
38static BLOCKING_NOTIFIER_HEAD(acpi_hed_notify_list);
39
40int register_acpi_hed_notifier(struct notifier_block *nb)
41{
42	return blocking_notifier_chain_register(&acpi_hed_notify_list, nb);
43}
44EXPORT_SYMBOL_GPL(register_acpi_hed_notifier);
45
46void unregister_acpi_hed_notifier(struct notifier_block *nb)
47{
48	blocking_notifier_chain_unregister(&acpi_hed_notify_list, nb);
49}
50EXPORT_SYMBOL_GPL(unregister_acpi_hed_notifier);
51
52/*
53 * SCI to report hardware error is forwarded to the listeners of HED,
54 * it is used by HEST Generic Hardware Error Source with notify type
55 * SCI.
56 */
57static void acpi_hed_notify(struct acpi_device *device, u32 event)
58{
59	blocking_notifier_call_chain(&acpi_hed_notify_list, 0, NULL);
60}
61
62static int acpi_hed_add(struct acpi_device *device)
63{
64	/* Only one hardware error device */
65	if (hed_handle)
66		return -EINVAL;
67	hed_handle = device->handle;
68	return 0;
69}
70
71static int acpi_hed_remove(struct acpi_device *device)
72{
73	hed_handle = NULL;
74	return 0;
75}
76
77static struct acpi_driver acpi_hed_driver = {
78	.name = "hardware_error_device",
79	.class = "hardware_error",
80	.ids = acpi_hed_ids,
81	.ops = {
82		.add = acpi_hed_add,
83		.remove = acpi_hed_remove,
84		.notify = acpi_hed_notify,
85	},
86};
87module_acpi_driver(acpi_hed_driver);
88
89ACPI_MODULE_NAME("hed");
90MODULE_AUTHOR("Huang Ying");
91MODULE_DESCRIPTION("ACPI Hardware Error Device Driver");
92MODULE_LICENSE("GPL");