1/*-
2 * Copyright (c) 2000 Michael Smith
3 * Copyright (c) 2000 BSDi
4 * Copyright (c) 2011 Jung-uk Kim <jkim@FreeBSD.org>
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 AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29/*
30 * 6.5 : Interrupt handling
31 */
32
33#include <sys/cdefs.h>
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34__FBSDID("$FreeBSD: head/sys/dev/acpica/Osd/OsdInterrupt.c 217240 2011-01-10 21:01:41Z jkim $");
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| 34__FBSDID("$FreeBSD: head/sys/dev/acpica/Osd/OsdInterrupt.c 217241 2011-01-10 21:09:38Z jkim $"); |
35
36#include <sys/param.h>
37#include <sys/kernel.h>
38#include <sys/bus.h>
39#include <sys/lock.h>
40#include <sys/malloc.h>
41#include <sys/mutex.h>
42#include <machine/bus.h>
43#include <machine/resource.h>
44#include <sys/rman.h>
45
46#include <contrib/dev/acpica/include/acpi.h>
47#include <contrib/dev/acpica/include/accommon.h>
48
49#include <dev/acpica/acpivar.h>
50
51#define _COMPONENT ACPI_OS_SERVICES
52ACPI_MODULE_NAME("INTERRUPT")
53
54MALLOC_DEFINE(M_ACPIINTR, "acpiintr", "ACPI interrupt");
55
56struct acpi_intr {
57 SLIST_ENTRY(acpi_intr) ai_link;
58 struct resource *ai_irq;
59 int ai_rid;
60 void *ai_handle;
61 int ai_number;
62 ACPI_OSD_HANDLER ai_handler;
63 void *ai_context;
64};
65static SLIST_HEAD(, acpi_intr) acpi_intr_list =
66 SLIST_HEAD_INITIALIZER(acpi_intr_list);
67static struct mtx acpi_intr_lock;
68
69static UINT32 InterruptOverride;
70
71static void
72acpi_intr_init(struct mtx *lock)
73{
74
75 mtx_init(lock, "ACPI interrupt lock", NULL, MTX_DEF);
76}
77
78SYSINIT(acpi_intr, SI_SUB_DRIVERS, SI_ORDER_FIRST, acpi_intr_init,
79 &acpi_intr_lock);
80
81static int
82acpi_intr_handler(void *arg)
83{
84 struct acpi_intr *ai;
85
86 ai = arg;
87 KASSERT(ai != NULL && ai->ai_handler != NULL,
88 ("invalid ACPI interrupt handler"));
89 if (ai->ai_handler(ai->ai_context) == ACPI_INTERRUPT_HANDLED)
90 return (FILTER_HANDLED);
91 return (FILTER_STRAY);
92}
93
94ACPI_STATUS
95AcpiOsInstallInterruptHandler(UINT32 InterruptNumber,
96 ACPI_OSD_HANDLER ServiceRoutine, void *Context)
97{
98 struct acpi_softc *sc;
99 struct acpi_intr *ai, *ap;
100
101 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
102
103 sc = devclass_get_softc(devclass_find("acpi"), 0);
104 KASSERT(sc != NULL && sc->acpi_dev != NULL,
105 ("can't find ACPI device to register interrupt"));
106
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107 if (InterruptNumber < 0 || InterruptNumber > 255 ||
108 ServiceRoutine == NULL)
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| 107 if (InterruptNumber > 255 || ServiceRoutine == NULL) |
108 return_ACPI_STATUS (AE_BAD_PARAMETER);
109
110 ai = malloc(sizeof(*ai), M_ACPIINTR, M_WAITOK | M_ZERO);
111 mtx_lock(&acpi_intr_lock);
112 SLIST_FOREACH(ap, &acpi_intr_list, ai_link) {
113 if (InterruptNumber == ap->ai_number ||
114 (InterruptNumber == InterruptOverride &&
115 InterruptNumber != AcpiGbl_FADT.SciInterrupt)) {
116 mtx_unlock(&acpi_intr_lock);
117 free(ai, M_ACPIINTR);
118 return_ACPI_STATUS (AE_ALREADY_EXISTS);
119 }
120 if (ai->ai_rid <= ap->ai_rid)
121 ai->ai_rid = ap->ai_rid + 1;
122 }
123 ai->ai_number = InterruptNumber;
124 ai->ai_handler = ServiceRoutine;
125 ai->ai_context = Context;
126
127 /*
128 * If the MADT contained an interrupt override directive for the SCI,
129 * we use that value instead of the one from the FADT.
130 */
131 if (InterruptOverride != 0 &&
132 InterruptNumber == AcpiGbl_FADT.SciInterrupt) {
133 device_printf(sc->acpi_dev,
134 "Overriding SCI from IRQ %u to IRQ %u\n",
135 InterruptNumber, InterruptOverride);
136 InterruptNumber = InterruptOverride;
137 }
138
139 /* Set up the interrupt resource. */
140 bus_set_resource(sc->acpi_dev, SYS_RES_IRQ, ai->ai_rid,
141 InterruptNumber, 1);
142 ai->ai_irq = bus_alloc_resource_any(sc->acpi_dev, SYS_RES_IRQ,
143 &ai->ai_rid, RF_SHAREABLE | RF_ACTIVE);
144 if (ai->ai_irq == NULL) {
145 device_printf(sc->acpi_dev, "could not allocate interrupt\n");
146 goto error;
147 }
148 if (bus_setup_intr(sc->acpi_dev, ai->ai_irq,
149 INTR_TYPE_MISC | INTR_MPSAFE, acpi_intr_handler, NULL, ai,
150 &ai->ai_handle) != 0) {
151 device_printf(sc->acpi_dev, "could not set up interrupt\n");
152 goto error;
153 }
154 SLIST_INSERT_HEAD(&acpi_intr_list, ai, ai_link);
155 mtx_unlock(&acpi_intr_lock);
156 return_ACPI_STATUS (AE_OK);
157
158error:
159 mtx_unlock(&acpi_intr_lock);
160 if (ai->ai_handle != NULL)
161 bus_teardown_intr(sc->acpi_dev, ai->ai_irq, ai->ai_handle);
162 if (ai->ai_irq != NULL)
163 bus_release_resource(sc->acpi_dev, SYS_RES_IRQ, ai->ai_rid,
164 ai->ai_irq);
165 bus_delete_resource(sc->acpi_dev, SYS_RES_IRQ, ai->ai_rid);
166 free(ai, M_ACPIINTR);
167 return_ACPI_STATUS (AE_ALREADY_EXISTS);
168}
169
170ACPI_STATUS
171AcpiOsRemoveInterruptHandler(UINT32 InterruptNumber,
172 ACPI_OSD_HANDLER ServiceRoutine)
173{
174 struct acpi_softc *sc;
175 struct acpi_intr *ai;
176
177 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
178
179 sc = devclass_get_softc(devclass_find("acpi"), 0);
180 KASSERT(sc != NULL && sc->acpi_dev != NULL,
181 ("can't find ACPI device to deregister interrupt"));
182
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184 if (InterruptNumber < 0 || InterruptNumber > 255 ||
185 ServiceRoutine == NULL)
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| 183 if (InterruptNumber > 255 || ServiceRoutine == NULL) |
184 return_ACPI_STATUS (AE_BAD_PARAMETER);
185 mtx_lock(&acpi_intr_lock);
186 SLIST_FOREACH(ai, &acpi_intr_list, ai_link)
187 if (InterruptNumber == ai->ai_number) {
188 if (ServiceRoutine != ai->ai_handler) {
189 mtx_unlock(&acpi_intr_lock);
190 return_ACPI_STATUS (AE_BAD_PARAMETER);
191 }
192 SLIST_REMOVE(&acpi_intr_list, ai, acpi_intr, ai_link);
193 break;
194 }
195 mtx_unlock(&acpi_intr_lock);
196 if (ai == NULL)
197 return_ACPI_STATUS (AE_NOT_EXIST);
198 bus_teardown_intr(sc->acpi_dev, ai->ai_irq, ai->ai_handle);
199 bus_release_resource(sc->acpi_dev, SYS_RES_IRQ, ai->ai_rid, ai->ai_irq);
200 bus_delete_resource(sc->acpi_dev, SYS_RES_IRQ, ai->ai_rid);
201 free(ai, M_ACPIINTR);
202 return_ACPI_STATUS (AE_OK);
203}
204
205ACPI_STATUS
206acpi_OverrideInterruptLevel(UINT32 InterruptNumber)
207{
208
209 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
210
211 if (InterruptOverride != 0)
212 return_ACPI_STATUS (AE_ALREADY_EXISTS);
213 InterruptOverride = InterruptNumber;
214 return_ACPI_STATUS (AE_OK);
215}
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