1 /* $NetBSD: OsdInterrupt.c,v 1.9 2018/03/20 12:14:52 bouyer 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 1.9 2018/03/20 12:14:52 bouyer 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
57 ACPI_MODULE_NAME("INTERRUPT")
58
59 MALLOC_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
68 struct 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
75 static LIST_HEAD(, acpi_interrupt_handler) acpi_interrupt_list =
76 LIST_HEAD_INITIALIZER(&acpi_interrupt_list);
77
78 kmutex_t acpi_interrupt_list_mtx;
79
80 /*
81 * AcpiOsInstallInterruptHandler:
82 *
83 * Install a handler for a hardware interrupt level.
84 */
85 ACPI_STATUS
AcpiOsInstallInterruptHandler(UINT32 InterruptNumber,ACPI_OSD_HANDLER ServiceRoutine,void * Context)86 AcpiOsInstallInterruptHandler(UINT32 InterruptNumber,
87 ACPI_OSD_HANDLER ServiceRoutine, void *Context)
88 {
89 return AcpiOsInstallInterruptHandler_xname(InterruptNumber,
90 ServiceRoutine, Context, "acpi SCI");
91 }
92
93 ACPI_STATUS
AcpiOsInstallInterruptHandler_xname(UINT32 InterruptNumber,ACPI_OSD_HANDLER ServiceRoutine,void * Context,const char * xname)94 AcpiOsInstallInterruptHandler_xname(UINT32 InterruptNumber,
95 ACPI_OSD_HANDLER ServiceRoutine, void *Context, const char *xname)
96 {
97 struct acpi_interrupt_handler *aih;
98 ACPI_STATUS rv;
99
100 if (InterruptNumber > 255)
101 return AE_BAD_PARAMETER;
102 if (ServiceRoutine == NULL)
103 return AE_BAD_PARAMETER;
104
105 aih = malloc(sizeof(*aih), M_ACPI, M_NOWAIT);
106 if (aih == NULL)
107 return AE_NO_MEMORY;
108
109 aih->aih_intrnum = InterruptNumber;
110 aih->aih_func = ServiceRoutine;
111
112 rv = acpi_md_OsInstallInterruptHandler(InterruptNumber,
113 ServiceRoutine, Context, &aih->aih_ih, xname);
114 if (rv == AE_OK) {
115 mutex_enter(&acpi_interrupt_list_mtx);
116 LIST_INSERT_HEAD(&acpi_interrupt_list, aih, aih_list);
117 mutex_exit(&acpi_interrupt_list_mtx);
118 } else
119 free(aih, M_ACPI);
120
121 return rv;
122 }
123
124 /*
125 * AcpiOsRemoveInterruptHandler:
126 *
127 * Remove an interrupt handler.
128 */
129 ACPI_STATUS
AcpiOsRemoveInterruptHandler(UINT32 InterruptNumber,ACPI_OSD_HANDLER ServiceRoutine)130 AcpiOsRemoveInterruptHandler(UINT32 InterruptNumber,
131 ACPI_OSD_HANDLER ServiceRoutine)
132 {
133 struct acpi_interrupt_handler *aih;
134
135 if (InterruptNumber > 255)
136 return AE_BAD_PARAMETER;
137 if (ServiceRoutine == NULL)
138 return AE_BAD_PARAMETER;
139
140 mutex_enter(&acpi_interrupt_list_mtx);
141 LIST_FOREACH(aih, &acpi_interrupt_list, aih_list) {
142 if (aih->aih_intrnum == InterruptNumber &&
143 aih->aih_func == ServiceRoutine) {
144 LIST_REMOVE(aih, aih_list);
145 mutex_exit(&acpi_interrupt_list_mtx);
146 acpi_md_OsRemoveInterruptHandler(aih->aih_ih);
147 free(aih, M_ACPI);
148 return AE_OK;
149 }
150 }
151 mutex_exit(&acpi_interrupt_list_mtx);
152 return AE_NOT_EXIST;
153 }
154