OsdInterrupt.c revision 1.6 
1/*	$NetBSD: OsdInterrupt.c,v 1.6 2007/02/19 22:31:17 ad 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 1.6 2007/02/19 22:31:17 ad 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);
77
78kmutex_t acpi_interrupt_list_mtx;
79
80/*
81 * AcpiOsInstallInterruptHandler:
82 *
83 *	Install a handler for a hardware interrupt level.
84 */
85ACPI_STATUS
86AcpiOsInstallInterruptHandler(UINT32 InterruptNumber,
87    ACPI_OSD_HANDLER ServiceRoutine, void *Context)
88{
89	struct acpi_interrupt_handler *aih;
90	ACPI_STATUS rv;
91
92	ACPI_FUNCTION_TRACE(__FUNCTION__);
93
94	if (InterruptNumber > 255)
95		return_ACPI_STATUS(AE_BAD_PARAMETER);
96	if (ServiceRoutine == NULL)
97		return_ACPI_STATUS(AE_BAD_PARAMETER);
98
99	aih = malloc(sizeof(*aih), M_ACPI, M_NOWAIT);
100	if (aih == NULL)
101		return_ACPI_STATUS(AE_NO_MEMORY);
102
103	aih->aih_intrnum = InterruptNumber;
104	aih->aih_func = ServiceRoutine;
105
106	rv = acpi_md_OsInstallInterruptHandler(InterruptNumber,
107	    ServiceRoutine, Context, &aih->aih_ih);
108	if (rv == AE_OK) {
109		mutex_enter(&acpi_interrupt_list_mtx);
110		LIST_INSERT_HEAD(&acpi_interrupt_list, aih, aih_list);
111		mutex_exit(&acpi_interrupt_list_mtx);
112	} else
113		free(aih, M_ACPI);
114
115	return_ACPI_STATUS(rv);
116}
117
118/*
119 * AcpiOsRemoveInterruptHandler:
120 *
121 *	Remove an interrupt handler.
122 */
123ACPI_STATUS
124AcpiOsRemoveInterruptHandler(UINT32 InterruptNumber,
125    ACPI_OSD_HANDLER ServiceRoutine)
126{
127	struct acpi_interrupt_handler *aih;
128
129	ACPI_FUNCTION_TRACE(__FUNCTION__);
130
131	if (InterruptNumber > 255)
132		return_ACPI_STATUS(AE_BAD_PARAMETER);
133	if (ServiceRoutine == NULL)
134		return_ACPI_STATUS(AE_BAD_PARAMETER);
135
136	mutex_enter(&acpi_interrupt_list_mtx);
137	LIST_FOREACH(aih, &acpi_interrupt_list, aih_list) {
138		if (aih->aih_intrnum == InterruptNumber &&
139		    aih->aih_func == ServiceRoutine) {
140			LIST_REMOVE(aih, aih_list);
141			mutex_exit(&acpi_interrupt_list_mtx);
142			acpi_md_OsRemoveInterruptHandler(aih->aih_ih);
143			free(aih, M_ACPI);
144			return_ACPI_STATUS(AE_OK);
145		}
146	}
147	mutex_exit(&acpi_interrupt_list_mtx);
148	return_ACPI_STATUS(AE_NOT_EXIST);
149}
150