acpi_hed.c revision 1.1 
1/*	$NetBSD: acpi_hed.c,v 1.1 2024/03/21 02:36:01 riastradh Exp $	*/
2
3/*-
4 * Copyright (c) 2024 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
19 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 */
28
29/*
30 * HED: Hardware Error Device, PNP0C33.
31 *
32 * This device serves only to receive notifications about hardware
33 * errors, which we then dispatch to apei(4).
34 */
35
36#include <sys/cdefs.h>
37__KERNEL_RCSID(0, "$NetBSD: acpi_hed.c,v 1.1 2024/03/21 02:36:01 riastradh Exp $");
38
39#include <sys/device.h>
40#include <sys/module.h>
41
42#include <dev/acpi/acpireg.h>
43#include <dev/acpi/acpivar.h>
44#include <dev/acpi/apei_hed.h>
45
46#define	_COMPONENT		ACPI_RESOURCE_COMPONENT
47ACPI_MODULE_NAME		("acpi_hed")
48
49struct acpihed_softc {
50	device_t		sc_dev;
51	struct acpi_devnode	*sc_node;
52};
53
54static const struct device_compatible_entry compat_data[] = {
55	{ .compat = "PNP0C33" },
56	DEVICE_COMPAT_EOL
57};
58
59static int acpihed_match(device_t, cfdata_t, void *);
60static void acpihed_attach(device_t, device_t, void *);
61static int acpihed_detach(device_t, int);
62static void acpihed_notify(ACPI_HANDLE, uint32_t, void *);
63
64CFATTACH_DECL_NEW(acpihed, sizeof(struct acpihed_softc),
65    acpihed_match, acpihed_attach, acpihed_detach, NULL);
66
67static int
68acpihed_match(device_t parent, cfdata_t match, void *aux)
69{
70	struct acpi_attach_args *aa = aux;
71
72	return acpi_compatible_match(aa, compat_data);
73}
74
75static void
76acpihed_attach(device_t parent, device_t self, void *aux)
77{
78	struct acpihed_softc *sc = device_private(self);
79	struct acpi_attach_args *aa = aux;
80
81	aprint_naive("\n");
82	aprint_normal(": ACPI Hardware Error Device\n");
83
84	pmf_device_register(self, NULL, NULL);
85
86	sc->sc_dev = self;
87	sc->sc_node = aa->aa_node;
88
89	acpi_register_notify(sc->sc_node, acpihed_notify);
90}
91
92static int
93acpihed_detach(device_t self, int flags)
94{
95	struct acpihed_softc *sc = device_private(self);
96	int error;
97
98	error = config_detach_children(self, flags);
99	if (error)
100		return error;
101
102	acpi_deregister_notify(sc->sc_node);
103
104	pmf_device_deregister(self);
105
106	return 0;
107}
108
109static void
110acpihed_notify(ACPI_HANDLE handle, uint32_t event, void *cookie)
111{
112
113	apei_hed_notify();
114}
115
116MODULE(MODULE_CLASS_DRIVER, acpihed, "apei");
117
118#ifdef _MODULE
119#include "ioconf.c"
120#endif
121
122static int
123acpihed_modcmd(modcmd_t cmd, void *opaque)
124{
125	int error = 0;
126
127	switch (cmd) {
128	case MODULE_CMD_INIT:
129#ifdef _MODULE
130		error = config_init_component(cfdriver_ioconf_acpihed,
131		    cfattach_ioconf_acpihed, cfdata_ioconf_acpihed);
132#endif
133		return error;
134	case MODULE_CMD_FINI:
135#ifdef _MODULE
136		error = config_fini_component(cfdriver_ioconf_acpihed,
137		    cfattach_ioconf_acpihed, cfdata_ioconf_acpihed);
138#endif
139		return error;
140	default:
141		return ENOTTY;
142	}
143}
144