OsdInterrupt.c revision 1.3 
1/*	$NetBSD: OsdInterrupt.c,v 1.3 2007/02/18 23:40:07 xtraeme Exp $	*/
2
3/*
4 * Copyright 2001 Wasabi Systems, Inc.
5 * All rights reserved.
6 *
7 * Written by Jason R. Thorpe for Wasabi Systems, Inc.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 *    must display the following acknowledgement:
19 *	This product includes software developed for the NetBSD Project by
20 *	Wasabi Systems, Inc.
21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse
22 *    or promote products derived from this software without specific prior
23 *    written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
28 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
35 * POSSIBILITY OF SUCH DAMAGE.
36 */
37
38/*
39 * OS Services Layer
40 *
41 * 6.5: Interrupt Handling
42 */
43
44#include <sys/cdefs.h>
45__KERNEL_RCSID(0, "$NetBSD: OsdInterrupt.c,v 1.3 2007/02/18 23:40:07 xtraeme Exp $");
46
47#include <sys/param.h>
48#include <sys/malloc.h>
49#include <sys/mutex.h>
50#include <sys/queue.h>
51
52#include <dev/acpi/acpica.h>
53
54#include <machine/acpi_machdep.h>
55
56#define	_COMPONENT	ACPI_OS_SERVICES
57ACPI_MODULE_NAME("INTERRUPT")
58
59MALLOC_DEFINE(M_ACPI, "acpi", "Advanced Configuration and Power Interface");
60
61/*
62 * We're lucky -- ACPI uses the same convention for interrupt service
63 * routine return values at NetBSD does -- so we can just ask MD code
64 * to hook it up directly (ACPI interrupts are always level triggered
65 * and shareable, and return 0 for "not handled" and 1 for "handled").
66 */
67
68struct acpi_interrupt_handler {
69	LIST_ENTRY(acpi_interrupt_handler) aih_list;
70	UINT32 aih_intrnum;
71	ACPI_OSD_HANDLER aih_func;
72	void *aih_ih;
73};
74
75static LIST_HEAD(, acpi_interrupt_handler) acpi_interrupt_list =
76    LIST_HEAD_INITIALIZER(&acpi_interrupt_list);
77static kmutex_t acpi_interrupt_list_mtx;
78
79#define	ACPI_INTERRUPT_LIST_LOCK()					\
80	mutex_enter(&acpi_interrupt_list_mtx)
81
82#define	ACPI_INTERRUPT_LIST_UNLOCK()					\
83	mutex_exit(&acpi_interrupt_list_mtx)
84
85/*
86 * AcpiOsInstallInterruptHandler:
87 *
88 *	Install a handler for a hardware interrupt level.
89 */
90ACPI_STATUS
91AcpiOsInstallInterruptHandler(UINT32 InterruptNumber,
92    ACPI_OSD_HANDLER ServiceRoutine, void *Context)
93{
94	struct acpi_interrupt_handler *aih;
95	ACPI_STATUS rv;
96
97	ACPI_FUNCTION_TRACE(__FUNCTION__);
98
99	if (InterruptNumber > 255)
100		return_ACPI_STATUS(AE_BAD_PARAMETER);
101	if (ServiceRoutine == NULL)
102		return_ACPI_STATUS(AE_BAD_PARAMETER);
103
104	aih = malloc(sizeof(*aih), M_ACPI, M_NOWAIT);
105	if (aih == NULL)
106		return_ACPI_STATUS(AE_NO_MEMORY);
107
108	aih->aih_intrnum = InterruptNumber;
109	aih->aih_func = ServiceRoutine;
110
111	rv = acpi_md_OsInstallInterruptHandler(InterruptNumber,
112	    ServiceRoutine, Context, &aih->aih_ih);
113	if (rv == AE_OK) {
114		ACPI_INTERRUPT_LIST_LOCK();
115		LIST_INSERT_HEAD(&acpi_interrupt_list, aih, aih_list);
116		ACPI_INTERRUPT_LIST_UNLOCK();
117	} else
118		free(aih, M_ACPI);
119
120	return_ACPI_STATUS(rv);
121}
122
123/*
124 * AcpiOsRemoveInterruptHandler:
125 *
126 *	Remove an interrupt handler.
127 */
128ACPI_STATUS
129AcpiOsRemoveInterruptHandler(UINT32 InterruptNumber,
130    ACPI_OSD_HANDLER ServiceRoutine)
131{
132	struct acpi_interrupt_handler *aih;
133
134	ACPI_FUNCTION_TRACE(__FUNCTION__);
135
136	if (InterruptNumber > 255)
137		return_ACPI_STATUS(AE_BAD_PARAMETER);
138	if (ServiceRoutine == NULL)
139		return_ACPI_STATUS(AE_BAD_PARAMETER);
140
141	ACPI_INTERRUPT_LIST_LOCK();
142	LIST_FOREACH(aih, &acpi_interrupt_list, aih_list) {
143		if (aih->aih_intrnum == InterruptNumber &&
144		    aih->aih_func == ServiceRoutine) {
145			LIST_REMOVE(aih, aih_list);
146			ACPI_INTERRUPT_LIST_UNLOCK();
147			acpi_md_OsRemoveInterruptHandler(aih->aih_ih);
148			free(aih, M_ACPI);
149			return_ACPI_STATUS(AE_OK);
150		}
151	}
152	ACPI_INTERRUPT_LIST_UNLOCK();
153	return_ACPI_STATUS(AE_NOT_EXIST);
154}
155