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>
34 #include <sys/param.h>
35 #include <sys/kernel.h>
36 #include <sys/bus.h>
37 #include <sys/lock.h>
38 #include <sys/malloc.h>
39 #include <sys/mutex.h>
40 #include <machine/bus.h>
41 #include <machine/resource.h>
42 #include <sys/rman.h>
43
44 #include <contrib/dev/acpica/include/acpi.h>
45 #include <contrib/dev/acpica/include/accommon.h>
46
47 #include <dev/acpica/acpivar.h>
48
49 #define _COMPONENT ACPI_OS_SERVICES
50 ACPI_MODULE_NAME("INTERRUPT")
51
52 static MALLOC_DEFINE(M_ACPIINTR, "acpiintr", "ACPI interrupt");
53
54 struct acpi_intr {
55 SLIST_ENTRY(acpi_intr) ai_link;
56 struct resource *ai_irq;
57 int ai_rid;
58 void *ai_handle;
59 int ai_number;
60 ACPI_OSD_HANDLER ai_handler;
61 void *ai_context;
62 };
63 static SLIST_HEAD(, acpi_intr) acpi_intr_list =
64 SLIST_HEAD_INITIALIZER(acpi_intr_list);
65 static struct mtx acpi_intr_lock;
66
67 static UINT32 InterruptOverride;
68
69 static void
acpi_intr_init(struct mtx * lock)70 acpi_intr_init(struct mtx *lock)
71 {
72
73 mtx_init(lock, "ACPI interrupt lock", NULL, MTX_DEF);
74 }
75
76 SYSINIT(acpi_intr, SI_SUB_DRIVERS, SI_ORDER_FIRST, acpi_intr_init,
77 &acpi_intr_lock);
78
79 static int
acpi_intr_handler(void * arg)80 acpi_intr_handler(void *arg)
81 {
82 struct acpi_intr *ai;
83
84 ai = arg;
85 KASSERT(ai != NULL && ai->ai_handler != NULL,
86 ("invalid ACPI interrupt handler"));
87 if (ai->ai_handler(ai->ai_context) == ACPI_INTERRUPT_HANDLED)
88 return (FILTER_HANDLED);
89 return (FILTER_STRAY);
90 }
91
92 static void
acpi_intr_destroy(device_t dev,struct acpi_intr * ai)93 acpi_intr_destroy(device_t dev, struct acpi_intr *ai)
94 {
95
96 if (ai->ai_handle != NULL)
97 bus_teardown_intr(dev, ai->ai_irq, ai->ai_handle);
98 if (ai->ai_irq != NULL)
99 bus_release_resource(dev, SYS_RES_IRQ, ai->ai_rid, ai->ai_irq);
100 bus_delete_resource(dev, SYS_RES_IRQ, ai->ai_rid);
101 free(ai, M_ACPIINTR);
102 }
103
104 ACPI_STATUS
AcpiOsInstallInterruptHandler(UINT32 InterruptNumber,ACPI_OSD_HANDLER ServiceRoutine,void * Context)105 AcpiOsInstallInterruptHandler(UINT32 InterruptNumber,
106 ACPI_OSD_HANDLER ServiceRoutine, void *Context)
107 {
108 struct acpi_softc *sc;
109 struct acpi_intr *ai, *ap;
110
111 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
112
113 sc = devclass_get_softc(devclass_find("acpi"), 0);
114 KASSERT(sc != NULL && sc->acpi_dev != NULL,
115 ("can't find ACPI device to register interrupt"));
116
117 if (InterruptNumber > 255 || ServiceRoutine == NULL)
118 return_ACPI_STATUS (AE_BAD_PARAMETER);
119
120 ai = malloc(sizeof(*ai), M_ACPIINTR, M_WAITOK | M_ZERO);
121 mtx_lock(&acpi_intr_lock);
122 SLIST_FOREACH(ap, &acpi_intr_list, ai_link) {
123 if (InterruptNumber == ap->ai_number ||
124 (InterruptNumber == InterruptOverride &&
125 InterruptNumber != AcpiGbl_FADT.SciInterrupt)) {
126 mtx_unlock(&acpi_intr_lock);
127 free(ai, M_ACPIINTR);
128 return_ACPI_STATUS (AE_ALREADY_EXISTS);
129 }
130 if (ai->ai_rid <= ap->ai_rid)
131 ai->ai_rid = ap->ai_rid + 1;
132 }
133 ai->ai_number = InterruptNumber;
134 ai->ai_handler = ServiceRoutine;
135 ai->ai_context = Context;
136 SLIST_INSERT_HEAD(&acpi_intr_list, ai, ai_link);
137 mtx_unlock(&acpi_intr_lock);
138
139 /*
140 * If the MADT contained an interrupt override directive for the SCI,
141 * we use that value instead of the one from the FADT.
142 */
143 if (InterruptOverride != 0 &&
144 InterruptNumber == AcpiGbl_FADT.SciInterrupt) {
145 device_printf(sc->acpi_dev,
146 "Overriding SCI from IRQ %u to IRQ %u\n",
147 InterruptNumber, InterruptOverride);
148 InterruptNumber = InterruptOverride;
149 }
150
151 /* Set up the interrupt resource. */
152 bus_set_resource(sc->acpi_dev, SYS_RES_IRQ, ai->ai_rid,
153 InterruptNumber, 1);
154 ai->ai_irq = bus_alloc_resource_any(sc->acpi_dev, SYS_RES_IRQ,
155 &ai->ai_rid, RF_SHAREABLE | RF_ACTIVE);
156 if (ai->ai_irq == NULL) {
157 device_printf(sc->acpi_dev, "could not allocate interrupt\n");
158 goto error;
159 }
160 if (bus_setup_intr(sc->acpi_dev, ai->ai_irq,
161 INTR_TYPE_MISC | INTR_MPSAFE, acpi_intr_handler, NULL, ai,
162 &ai->ai_handle) != 0) {
163 device_printf(sc->acpi_dev, "could not set up interrupt\n");
164 goto error;
165 }
166 return_ACPI_STATUS (AE_OK);
167
168 error:
169 mtx_lock(&acpi_intr_lock);
170 SLIST_REMOVE(&acpi_intr_list, ai, acpi_intr, ai_link);
171 mtx_unlock(&acpi_intr_lock);
172 acpi_intr_destroy(sc->acpi_dev, ai);
173 return_ACPI_STATUS (AE_ALREADY_EXISTS);
174 }
175
176 ACPI_STATUS
AcpiOsRemoveInterruptHandler(UINT32 InterruptNumber,ACPI_OSD_HANDLER ServiceRoutine)177 AcpiOsRemoveInterruptHandler(UINT32 InterruptNumber,
178 ACPI_OSD_HANDLER ServiceRoutine)
179 {
180 struct acpi_softc *sc;
181 struct acpi_intr *ai;
182
183 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
184
185 sc = devclass_get_softc(devclass_find("acpi"), 0);
186 KASSERT(sc != NULL && sc->acpi_dev != NULL,
187 ("can't find ACPI device to deregister interrupt"));
188
189 if (InterruptNumber > 255 || ServiceRoutine == NULL)
190 return_ACPI_STATUS (AE_BAD_PARAMETER);
191 mtx_lock(&acpi_intr_lock);
192 SLIST_FOREACH(ai, &acpi_intr_list, ai_link)
193 if (InterruptNumber == ai->ai_number) {
194 if (ServiceRoutine != ai->ai_handler) {
195 mtx_unlock(&acpi_intr_lock);
196 return_ACPI_STATUS (AE_BAD_PARAMETER);
197 }
198 SLIST_REMOVE(&acpi_intr_list, ai, acpi_intr, ai_link);
199 break;
200 }
201 mtx_unlock(&acpi_intr_lock);
202 if (ai == NULL)
203 return_ACPI_STATUS (AE_NOT_EXIST);
204 acpi_intr_destroy(sc->acpi_dev, ai);
205 return_ACPI_STATUS (AE_OK);
206 }
207
208 ACPI_STATUS
acpi_OverrideInterruptLevel(UINT32 InterruptNumber)209 acpi_OverrideInterruptLevel(UINT32 InterruptNumber)
210 {
211
212 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
213
214 if (InterruptOverride != 0)
215 return_ACPI_STATUS (AE_ALREADY_EXISTS);
216 InterruptOverride = InterruptNumber;
217 return_ACPI_STATUS (AE_OK);
218 }
219