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