1 /*-
2 * Copyright (c) 2000 Michael Smith
3 * Copyright (c) 2000 BSDi
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 *
27 * $FreeBSD: src/sys/dev/acpica/Osd/OsdInterrupt.c,v 1.17 2004/04/14 03:41:06 njl Exp $
28 */
29
30 /*
31 * Interrupt Handling
32 */
33
34 #include <sys/param.h>
35 #include <sys/kernel.h>
36 #include <sys/bus.h>
37 #include <sys/rman.h>
38 #include <sys/machintr.h>
39
40 #include "acpi.h"
41 #include "accommon.h"
42 #include <dev/acpica/acpivar.h>
43 #include <dev/acpica/acpi_sci_var.h>
44
45 #define _COMPONENT ACPI_OS_SERVICES
46 ACPI_MODULE_NAME("INTERRUPT")
47
48 static void InterruptWrapper(void *arg);
49
50 static ACPI_OSD_HANDLER InterruptHandler;
51
52 ACPI_STATUS
AcpiOsInstallInterruptHandler(UINT32 InterruptNumber,ACPI_OSD_HANDLER ServiceRoutine,void * Context)53 AcpiOsInstallInterruptHandler(UINT32 InterruptNumber,
54 ACPI_OSD_HANDLER ServiceRoutine, void *Context)
55 {
56 struct acpi_softc *sc;
57 u_int flags;
58
59 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
60
61 if ((sc = devclass_get_softc(devclass_find("acpi"), 0)) == NULL)
62 panic("can't find ACPI device to register interrupt");
63 if (sc->acpi_dev == NULL)
64 panic("acpi softc has invalid device");
65
66 /*
67 * Configure SCI mode
68 */
69 acpi_sci_config();
70
71 /*
72 * This could happen:
73 * - SCI is disabled by user
74 * - No suitable interrupt mode for SCI
75 */
76 if (!acpi_sci_enabled())
77 return_ACPI_STATUS (AE_OK);
78
79 if (InterruptNumber < 0 || InterruptNumber > 255)
80 return_ACPI_STATUS (AE_BAD_PARAMETER);
81 if (ServiceRoutine == NULL)
82 return_ACPI_STATUS (AE_BAD_PARAMETER);
83 if (InterruptHandler != NULL) {
84 device_printf(sc->acpi_dev, "interrupt handler already installed\n");
85 return_ACPI_STATUS (AE_ALREADY_EXISTS);
86 }
87 InterruptHandler = ServiceRoutine;
88
89 flags = RF_ACTIVE;
90 if (acpi_sci_pci_shareable())
91 flags |= RF_SHAREABLE;
92
93 /* Set up the interrupt resource. */
94 sc->acpi_irq_rid = 0;
95 bus_set_resource(sc->acpi_dev, SYS_RES_IRQ, 0, InterruptNumber, 1,
96 machintr_legacy_intr_cpuid(InterruptNumber));
97 sc->acpi_irq = bus_alloc_resource_any(sc->acpi_dev, SYS_RES_IRQ,
98 &sc->acpi_irq_rid, flags);
99 if (sc->acpi_irq == NULL) {
100 device_printf(sc->acpi_dev, "could not allocate interrupt\n");
101 goto error;
102 }
103 if (bus_setup_intr(sc->acpi_dev, sc->acpi_irq, INTR_MPSAFE,
104 InterruptWrapper, Context, &sc->acpi_irq_handle, NULL)) {
105 device_printf(sc->acpi_dev, "could not set up interrupt\n");
106 goto error;
107 }
108
109 return_ACPI_STATUS (AE_OK);
110
111 error:
112 if (sc->acpi_irq_handle)
113 bus_teardown_intr(sc->acpi_dev, sc->acpi_irq, sc->acpi_irq_handle);
114 sc->acpi_irq_handle = NULL;
115 if (sc->acpi_irq)
116 bus_release_resource(sc->acpi_dev, SYS_RES_IRQ, 0, sc->acpi_irq);
117 sc->acpi_irq = NULL;
118 bus_delete_resource(sc->acpi_dev, SYS_RES_IRQ, 0);
119 InterruptHandler = NULL;
120
121 return_ACPI_STATUS (AE_ALREADY_EXISTS);
122 }
123
124 ACPI_STATUS
AcpiOsRemoveInterruptHandler(UINT32 InterruptNumber,ACPI_OSD_HANDLER ServiceRoutine)125 AcpiOsRemoveInterruptHandler(UINT32 InterruptNumber, ACPI_OSD_HANDLER ServiceRoutine)
126 {
127 struct acpi_softc *sc;
128
129 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
130
131 if (!acpi_sci_enabled())
132 return_ACPI_STATUS (AE_OK);
133
134 if (InterruptNumber > 255 || ServiceRoutine == NULL)
135 return_ACPI_STATUS (AE_BAD_PARAMETER);
136
137 if ((sc = devclass_get_softc(devclass_find("acpi"), 0)) == NULL)
138 panic("can't find ACPI device to deregister interrupt");
139
140 if (sc->acpi_irq == NULL)
141 return_ACPI_STATUS (AE_NOT_EXIST);
142
143 bus_teardown_intr(sc->acpi_dev, sc->acpi_irq, sc->acpi_irq_handle);
144 bus_release_resource(sc->acpi_dev, SYS_RES_IRQ, 0, sc->acpi_irq);
145 bus_delete_resource(sc->acpi_dev, SYS_RES_IRQ, 0);
146
147 sc->acpi_irq = NULL;
148 InterruptHandler = NULL;
149
150 return_ACPI_STATUS (AE_OK);
151 }
152
153 static void
InterruptWrapper(void * arg)154 InterruptWrapper(void *arg)
155 {
156 lwkt_gettoken(&acpi_token);
157 InterruptHandler(arg);
158 lwkt_reltoken(&acpi_token);
159 }
160