FreeBSD/Linux Kernel Cross Reference
sys/dev/acpica/Osd/OsdInterrupt.c

     /*-
      * Copyright (c) 2000 Michael Smith
      * Copyright (c) 2000 BSDi
      * All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
      * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     * $FreeBSD: src/sys/dev/acpica/Osd/OsdInterrupt.c,v 1.17 2004/04/14 03:41:06 njl Exp $
     */
    
    /*
     * 6.5 : Interrupt handling
     */
    
    #include <sys/param.h>
    #include <sys/kernel.h>
    #include <sys/bus.h>
    #include <sys/rman.h>
    #include <sys/thread2.h>
    #include <sys/machintr.h>
     
    #include "acpi.h"
    #include "accommon.h"
    #include <dev/acpica/acpivar.h>
    #include <dev/acpica/acpi_sci_var.h>
    
    #define _COMPONENT      ACPI_OS_SERVICES
    ACPI_MODULE_NAME("INTERRUPT")
    
    static void             InterruptWrapper(void *arg);
    
    static ACPI_OSD_HANDLER InterruptHandler;
    
    ACPI_STATUS
    AcpiOsInstallInterruptHandler(UINT32 InterruptNumber,
        ACPI_OSD_HANDLER ServiceRoutine, void *Context)
    {
        struct acpi_softc   *sc;
        u_int flags;
    
        ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
    
        if ((sc = devclass_get_softc(devclass_find("acpi"), 0)) == NULL)
            panic("can't find ACPI device to register interrupt");
        if (sc->acpi_dev == NULL)
            panic("acpi softc has invalid device");
    
        /*
         * Configure SCI mode
         */
        acpi_sci_config();
    
        /*
         * This could happen:
         * - SCI is disabled by user
         * - No suitable interrupt mode for SCI
         */
        if (!acpi_sci_enabled())
            return_ACPI_STATUS (AE_OK);
    
        if (InterruptNumber < 0 || InterruptNumber > 255)
            return_ACPI_STATUS (AE_BAD_PARAMETER);
        if (ServiceRoutine == NULL)
            return_ACPI_STATUS (AE_BAD_PARAMETER);
        if (InterruptHandler != NULL) {
            device_printf(sc->acpi_dev, "interrupt handler already installed\n");
            return_ACPI_STATUS (AE_ALREADY_EXISTS);
        }
        InterruptHandler = ServiceRoutine;
    
        flags = RF_ACTIVE;
        if (acpi_sci_pci_shareable())
            flags |= RF_SHAREABLE;
    
        /* Set up the interrupt resource. */
        sc->acpi_irq_rid = 0;
        bus_set_resource(sc->acpi_dev, SYS_RES_IRQ, 0, InterruptNumber, 1,
            machintr_legacy_intr_cpuid(InterruptNumber));
        sc->acpi_irq = bus_alloc_resource_any(sc->acpi_dev, SYS_RES_IRQ,
            &sc->acpi_irq_rid, flags);
       if (sc->acpi_irq == NULL) {
           device_printf(sc->acpi_dev, "could not allocate interrupt\n");
           goto error;
       }
       if (bus_setup_intr(sc->acpi_dev, sc->acpi_irq, 0,
                       InterruptWrapper, Context, &sc->acpi_irq_handle, NULL)) {
           device_printf(sc->acpi_dev, "could not set up interrupt\n");
           goto error;
       }
   
       return_ACPI_STATUS (AE_OK);
   
   error:
       if (sc->acpi_irq_handle)
           bus_teardown_intr(sc->acpi_dev, sc->acpi_irq, sc->acpi_irq_handle);
       sc->acpi_irq_handle = NULL;
       if (sc->acpi_irq)
           bus_release_resource(sc->acpi_dev, SYS_RES_IRQ, 0, sc->acpi_irq);
       sc->acpi_irq = NULL;
       bus_delete_resource(sc->acpi_dev, SYS_RES_IRQ, 0);
       InterruptHandler = NULL;
   
       return_ACPI_STATUS (AE_ALREADY_EXISTS);
   }
   
   ACPI_STATUS
   AcpiOsRemoveInterruptHandler(UINT32 InterruptNumber, ACPI_OSD_HANDLER ServiceRoutine)
   {
       struct acpi_softc   *sc;
   
       ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
   
       if (!acpi_sci_enabled())
           return_ACPI_STATUS (AE_OK);
   
       if (InterruptNumber < 0 || InterruptNumber > 255)
           return_ACPI_STATUS (AE_BAD_PARAMETER);
       if (ServiceRoutine == NULL)
           return_ACPI_STATUS (AE_BAD_PARAMETER);
   
       if ((sc = devclass_get_softc(devclass_find("acpi"), 0)) == NULL)
           panic("can't find ACPI device to deregister interrupt");
   
       if (sc->acpi_irq == NULL)
           return_ACPI_STATUS (AE_NOT_EXIST);
   
       bus_teardown_intr(sc->acpi_dev, sc->acpi_irq, sc->acpi_irq_handle);
       bus_release_resource(sc->acpi_dev, SYS_RES_IRQ, 0, sc->acpi_irq);
       bus_delete_resource(sc->acpi_dev, SYS_RES_IRQ, 0);
   
       sc->acpi_irq = NULL;
       InterruptHandler = NULL;
   
       return_ACPI_STATUS (AE_OK);
   }
   
   static void
   InterruptWrapper(void *arg)
   {
       crit_enter();
       InterruptHandler(arg);
       crit_exit();
   }

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