221 lines
6.4 KiB
C
221 lines
6.4 KiB
C
/*-
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* Copyright (c) 2000 Michael Smith
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* Copyright (c) 2000 BSDi
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* Copyright (c) 2011 Jung-uk Kim <jkim@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* 6.5 : Interrupt handling
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/bus.h>
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#include <sys/lock.h>
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#include <sys/malloc.h>
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#include <sys/mutex.h>
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#include <machine/bus.h>
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#include <machine/resource.h>
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#include <sys/rman.h>
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#include <contrib/dev/acpica/include/acpi.h>
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#include <contrib/dev/acpica/include/accommon.h>
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#include <dev/acpica/acpivar.h>
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#define _COMPONENT ACPI_OS_SERVICES
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ACPI_MODULE_NAME("INTERRUPT")
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static MALLOC_DEFINE(M_ACPIINTR, "acpiintr", "ACPI interrupt");
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struct acpi_intr {
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SLIST_ENTRY(acpi_intr) ai_link;
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struct resource *ai_irq;
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int ai_rid;
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void *ai_handle;
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int ai_number;
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ACPI_OSD_HANDLER ai_handler;
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void *ai_context;
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};
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static SLIST_HEAD(, acpi_intr) acpi_intr_list =
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SLIST_HEAD_INITIALIZER(acpi_intr_list);
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static struct mtx acpi_intr_lock;
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static UINT32 InterruptOverride;
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static void
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acpi_intr_init(struct mtx *lock)
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{
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mtx_init(lock, "ACPI interrupt lock", NULL, MTX_DEF);
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}
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SYSINIT(acpi_intr, SI_SUB_DRIVERS, SI_ORDER_FIRST, acpi_intr_init,
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&acpi_intr_lock);
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static int
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acpi_intr_handler(void *arg)
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{
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struct acpi_intr *ai;
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ai = arg;
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KASSERT(ai != NULL && ai->ai_handler != NULL,
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("invalid ACPI interrupt handler"));
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if (ai->ai_handler(ai->ai_context) == ACPI_INTERRUPT_HANDLED)
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return (FILTER_HANDLED);
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return (FILTER_STRAY);
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}
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static void
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acpi_intr_destroy(device_t dev, struct acpi_intr *ai)
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{
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if (ai->ai_handle != NULL)
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bus_teardown_intr(dev, ai->ai_irq, ai->ai_handle);
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if (ai->ai_irq != NULL)
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bus_release_resource(dev, SYS_RES_IRQ, ai->ai_rid, ai->ai_irq);
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bus_delete_resource(dev, SYS_RES_IRQ, ai->ai_rid);
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free(ai, M_ACPIINTR);
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}
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ACPI_STATUS
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AcpiOsInstallInterruptHandler(UINT32 InterruptNumber,
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ACPI_OSD_HANDLER ServiceRoutine, void *Context)
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{
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struct acpi_softc *sc;
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struct acpi_intr *ai, *ap;
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ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
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sc = devclass_get_softc(devclass_find("acpi"), 0);
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KASSERT(sc != NULL && sc->acpi_dev != NULL,
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("can't find ACPI device to register interrupt"));
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if (InterruptNumber > 255 || ServiceRoutine == NULL)
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return_ACPI_STATUS (AE_BAD_PARAMETER);
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ai = malloc(sizeof(*ai), M_ACPIINTR, M_WAITOK | M_ZERO);
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mtx_lock(&acpi_intr_lock);
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SLIST_FOREACH(ap, &acpi_intr_list, ai_link) {
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if (InterruptNumber == ap->ai_number ||
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(InterruptNumber == InterruptOverride &&
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InterruptNumber != AcpiGbl_FADT.SciInterrupt)) {
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mtx_unlock(&acpi_intr_lock);
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free(ai, M_ACPIINTR);
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return_ACPI_STATUS (AE_ALREADY_EXISTS);
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}
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if (ai->ai_rid <= ap->ai_rid)
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ai->ai_rid = ap->ai_rid + 1;
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}
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ai->ai_number = InterruptNumber;
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ai->ai_handler = ServiceRoutine;
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ai->ai_context = Context;
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SLIST_INSERT_HEAD(&acpi_intr_list, ai, ai_link);
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mtx_unlock(&acpi_intr_lock);
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/*
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* If the MADT contained an interrupt override directive for the SCI,
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* we use that value instead of the one from the FADT.
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*/
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if (InterruptOverride != 0 &&
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InterruptNumber == AcpiGbl_FADT.SciInterrupt) {
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device_printf(sc->acpi_dev,
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"Overriding SCI from IRQ %u to IRQ %u\n",
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InterruptNumber, InterruptOverride);
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InterruptNumber = InterruptOverride;
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}
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/* Set up the interrupt resource. */
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bus_set_resource(sc->acpi_dev, SYS_RES_IRQ, ai->ai_rid,
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InterruptNumber, 1);
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ai->ai_irq = bus_alloc_resource_any(sc->acpi_dev, SYS_RES_IRQ,
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&ai->ai_rid, RF_SHAREABLE | RF_ACTIVE);
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if (ai->ai_irq == NULL) {
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device_printf(sc->acpi_dev, "could not allocate interrupt\n");
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goto error;
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}
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if (bus_setup_intr(sc->acpi_dev, ai->ai_irq,
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INTR_TYPE_MISC | INTR_MPSAFE, acpi_intr_handler, NULL, ai,
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&ai->ai_handle) != 0) {
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device_printf(sc->acpi_dev, "could not set up interrupt\n");
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goto error;
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}
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return_ACPI_STATUS (AE_OK);
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error:
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mtx_lock(&acpi_intr_lock);
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SLIST_REMOVE(&acpi_intr_list, ai, acpi_intr, ai_link);
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mtx_unlock(&acpi_intr_lock);
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acpi_intr_destroy(sc->acpi_dev, ai);
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return_ACPI_STATUS (AE_ALREADY_EXISTS);
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}
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ACPI_STATUS
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AcpiOsRemoveInterruptHandler(UINT32 InterruptNumber,
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ACPI_OSD_HANDLER ServiceRoutine)
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{
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struct acpi_softc *sc;
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struct acpi_intr *ai;
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ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
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sc = devclass_get_softc(devclass_find("acpi"), 0);
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KASSERT(sc != NULL && sc->acpi_dev != NULL,
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("can't find ACPI device to deregister interrupt"));
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if (InterruptNumber > 255 || ServiceRoutine == NULL)
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return_ACPI_STATUS (AE_BAD_PARAMETER);
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mtx_lock(&acpi_intr_lock);
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SLIST_FOREACH(ai, &acpi_intr_list, ai_link)
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if (InterruptNumber == ai->ai_number) {
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if (ServiceRoutine != ai->ai_handler) {
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mtx_unlock(&acpi_intr_lock);
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return_ACPI_STATUS (AE_BAD_PARAMETER);
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}
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SLIST_REMOVE(&acpi_intr_list, ai, acpi_intr, ai_link);
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break;
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}
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mtx_unlock(&acpi_intr_lock);
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if (ai == NULL)
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return_ACPI_STATUS (AE_NOT_EXIST);
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acpi_intr_destroy(sc->acpi_dev, ai);
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return_ACPI_STATUS (AE_OK);
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}
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ACPI_STATUS
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acpi_OverrideInterruptLevel(UINT32 InterruptNumber)
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{
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ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
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if (InterruptOverride != 0)
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return_ACPI_STATUS (AE_ALREADY_EXISTS);
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InterruptOverride = InterruptNumber;
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return_ACPI_STATUS (AE_OK);
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}
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