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
47 ACPI_MODULE_NAME ("acpi_hed")
48
49 struct acpihed_softc {
50 device_t sc_dev;
51 struct acpi_devnode *sc_node;
52 };
53
54 static const struct device_compatible_entry compat_data[] = {
55 { .compat = "PNP0C33" },
56 DEVICE_COMPAT_EOL
57 };
58
59 static int acpihed_match(device_t, cfdata_t, void *);
60 static void acpihed_attach(device_t, device_t, void *);
61 static int acpihed_detach(device_t, int);
62 static void acpihed_notify(ACPI_HANDLE, uint32_t, void *);
63
64 CFATTACH_DECL_NEW(acpihed, sizeof(struct acpihed_softc),
65 acpihed_match, acpihed_attach, acpihed_detach, NULL);
66
67 static int
acpihed_match(device_t parent,cfdata_t match,void * aux)68 acpihed_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
75 static void
acpihed_attach(device_t parent,device_t self,void * aux)76 acpihed_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
92 static int
acpihed_detach(device_t self,int flags)93 acpihed_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
109 static void
acpihed_notify(ACPI_HANDLE handle,uint32_t event,void * cookie)110 acpihed_notify(ACPI_HANDLE handle, uint32_t event, void *cookie)
111 {
112
113 apei_hed_notify();
114 }
115
116 MODULE(MODULE_CLASS_DRIVER, acpihed, "apei");
117
118 #ifdef _MODULE
119 #include "ioconf.c"
120 #endif
121
122 static int
acpihed_modcmd(modcmd_t cmd,void * opaque)123 acpihed_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