Home | History | Annotate | Line # | Download | only in acpi 
      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
     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
     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
     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
    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
    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