sys/dev/acpica5/Osd/OsdInterrupt.c

   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  * $DragonFly: src/sys/dev/acpica5/Osd/OsdInterrupt.c,v 1.7 2006/10/25 20:55:52 dillon Exp $
  29  */
  30
  31 /*
  32  * 6.5 : Interrupt handling
  33  */
  34
  35 #include <sys/param.h>
  36 #include <sys/kernel.h>
  37 #include <sys/bus.h>
  38 #include <sys/rman.h>
  39 #include <sys/thread2.h>
  40
  41 #include "acpi.h"
  42 #include "accommon.h"
  43 #include <dev/acpica5/acpivar.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 static UINT32           InterruptOverride = 0;
  52
  53 ACPI_STATUS
  54 AcpiOsInstallInterruptHandler(UINT32 InterruptNumber,
  55     ACPI_OSD_HANDLER ServiceRoutine, void *Context)
  56 {
  57     struct acpi_softc   *sc;
  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     if (InterruptNumber < 0 || InterruptNumber > 255)
  67         return_ACPI_STATUS (AE_BAD_PARAMETER);
  68     if (ServiceRoutine == NULL)
  69         return_ACPI_STATUS (AE_BAD_PARAMETER);
  70     if (InterruptHandler != NULL) {
  71         device_printf(sc->acpi_dev, "interrupt handler already installed\n");
  72         return_ACPI_STATUS (AE_ALREADY_EXISTS);
  73     }
  74     InterruptHandler = ServiceRoutine;
  75
  76     /*
  77      * If the MADT contained an interrupt override directive for the SCI,
  78      * we use that value instead of the one from the FADT.
  79      */
  80     if (InterruptOverride != 0) {
  81             device_printf(sc->acpi_dev,
  82                 "Overriding SCI Interrupt from IRQ %u to IRQ %u\n",
  83                 InterruptNumber, InterruptOverride);
  84             InterruptNumber = InterruptOverride;
  85     }
  86
  87     /* Set up the interrupt resource. */
  88     sc->acpi_irq_rid = 0;
  89     bus_set_resource(sc->acpi_dev, SYS_RES_IRQ, 0, InterruptNumber, 1);
  90     sc->acpi_irq = bus_alloc_resource_any(sc->acpi_dev, SYS_RES_IRQ,
  91         &sc->acpi_irq_rid, RF_SHAREABLE | RF_ACTIVE);
  92     if (sc->acpi_irq == NULL) {
  93         device_printf(sc->acpi_dev, "could not allocate interrupt\n");
  94         goto error;
  95     }
  96     if (bus_setup_intr(sc->acpi_dev, sc->acpi_irq, 0,
  97                     InterruptWrapper, Context, &sc->acpi_irq_handle, NULL)) {
  98         device_printf(sc->acpi_dev, "could not set up interrupt\n");
  99         goto error;
 100     }
 101
 102     return_ACPI_STATUS (AE_OK);
 103
 104 error:
 105     if (sc->acpi_irq_handle)
 106         bus_teardown_intr(sc->acpi_dev, sc->acpi_irq, sc->acpi_irq_handle);
 107     sc->acpi_irq_handle = NULL;
 108     if (sc->acpi_irq)
 109         bus_release_resource(sc->acpi_dev, SYS_RES_IRQ, 0, sc->acpi_irq);
 110     sc->acpi_irq = NULL;
 111     bus_delete_resource(sc->acpi_dev, SYS_RES_IRQ, 0);
 112     InterruptHandler = NULL;
 113
 114     return_ACPI_STATUS (AE_ALREADY_EXISTS);
 115 }
 116
 117 ACPI_STATUS
 118 AcpiOsRemoveInterruptHandler(UINT32 InterruptNumber, ACPI_OSD_HANDLER ServiceRoutine)
 119 {
 120     struct acpi_softc   *sc;
 121
 122     ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
 123
 124     if (InterruptNumber < 0 || InterruptNumber > 255)
 125         return_ACPI_STATUS (AE_BAD_PARAMETER);
 126     if (ServiceRoutine == NULL)
 127         return_ACPI_STATUS (AE_BAD_PARAMETER);
 128
 129     if ((sc = devclass_get_softc(devclass_find("acpi"), 0)) == NULL)
 130         panic("can't find ACPI device to deregister interrupt");
 131
 132     if (sc->acpi_irq == NULL)
 133         return_ACPI_STATUS (AE_NOT_EXIST);
 134
 135     bus_teardown_intr(sc->acpi_dev, sc->acpi_irq, sc->acpi_irq_handle);
 136     bus_release_resource(sc->acpi_dev, SYS_RES_IRQ, 0, sc->acpi_irq);
 137     bus_delete_resource(sc->acpi_dev, SYS_RES_IRQ, 0);
 138
 139     sc->acpi_irq = NULL;
 140     InterruptHandler = NULL;
 141
 142     return_ACPI_STATUS (AE_OK);
 143 }
 144
 145 ACPI_STATUS
 146 acpi_OverrideInterruptLevel(UINT32 InterruptNumber)
 147 {
 148
 149     ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
 150
 151     if (InterruptOverride != 0)
 152         return_ACPI_STATUS (AE_ALREADY_EXISTS);
 153     InterruptOverride = InterruptNumber;
 154     return_ACPI_STATUS (AE_OK);
 155 }
 156
 157 static void
 158 InterruptWrapper(void *arg)
 159 {
 160     crit_enter();
 161     InterruptHandler(arg);
 162     crit_exit();
 163 }