Thomas Gleixner | 1802d0b | 2019-05-27 08:55:21 +0200 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0-only |
Huang Ying | 801eab8 | 2010-05-18 14:35:17 +0800 | [diff] [blame] | 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. |
Huang Ying | 801eab8 | 2010-05-18 14:35:17 +0800 | [diff] [blame] | 10 | */ |
| 11 | |
| 12 | #include <linux/kernel.h> |
| 13 | #include <linux/module.h> |
| 14 | #include <linux/init.h> |
| 15 | #include <linux/acpi.h> |
Huang Ying | 801eab8 | 2010-05-18 14:35:17 +0800 | [diff] [blame] | 16 | #include <acpi/hed.h> |
| 17 | |
Mathias Krause | 69cda6e | 2015-06-13 14:26:56 +0200 | [diff] [blame] | 18 | static const struct acpi_device_id acpi_hed_ids[] = { |
Huang Ying | 801eab8 | 2010-05-18 14:35:17 +0800 | [diff] [blame] | 19 | {"PNP0C33", 0}, |
| 20 | {"", 0}, |
| 21 | }; |
| 22 | MODULE_DEVICE_TABLE(acpi, acpi_hed_ids); |
| 23 | |
| 24 | static acpi_handle hed_handle; |
| 25 | |
| 26 | static BLOCKING_NOTIFIER_HEAD(acpi_hed_notify_list); |
| 27 | |
| 28 | int register_acpi_hed_notifier(struct notifier_block *nb) |
| 29 | { |
| 30 | return blocking_notifier_chain_register(&acpi_hed_notify_list, nb); |
| 31 | } |
| 32 | EXPORT_SYMBOL_GPL(register_acpi_hed_notifier); |
| 33 | |
| 34 | void unregister_acpi_hed_notifier(struct notifier_block *nb) |
| 35 | { |
| 36 | blocking_notifier_chain_unregister(&acpi_hed_notify_list, nb); |
| 37 | } |
| 38 | EXPORT_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 | */ |
| 45 | static void acpi_hed_notify(struct acpi_device *device, u32 event) |
| 46 | { |
| 47 | blocking_notifier_call_chain(&acpi_hed_notify_list, 0, NULL); |
| 48 | } |
| 49 | |
Bill Pemberton | da095fd3 | 2012-11-19 13:22:46 -0500 | [diff] [blame] | 50 | static int acpi_hed_add(struct acpi_device *device) |
Huang Ying | 801eab8 | 2010-05-18 14:35:17 +0800 | [diff] [blame] | 51 | { |
| 52 | /* Only one hardware error device */ |
| 53 | if (hed_handle) |
| 54 | return -EINVAL; |
| 55 | hed_handle = device->handle; |
| 56 | return 0; |
| 57 | } |
| 58 | |
Rafael J. Wysocki | 51fac83 | 2013-01-24 00:24:48 +0100 | [diff] [blame] | 59 | static int acpi_hed_remove(struct acpi_device *device) |
Huang Ying | 801eab8 | 2010-05-18 14:35:17 +0800 | [diff] [blame] | 60 | { |
| 61 | hed_handle = NULL; |
| 62 | return 0; |
| 63 | } |
| 64 | |
| 65 | static 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 | }; |
Mika Westerberg | 8fe4bf6 | 2012-09-07 10:31:41 +0300 | [diff] [blame] | 75 | module_acpi_driver(acpi_hed_driver); |
Huang Ying | 801eab8 | 2010-05-18 14:35:17 +0800 | [diff] [blame] | 76 | |
Huang Ying | 801eab8 | 2010-05-18 14:35:17 +0800 | [diff] [blame] | 77 | MODULE_AUTHOR("Huang Ying"); |
| 78 | MODULE_DESCRIPTION("ACPI Hardware Error Device Driver"); |
| 79 | MODULE_LICENSE("GPL"); |