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/*-
* Copyright (c) 2000 Michael Smith
* Copyright (c) 2000 BSDi
* Copyright (c) 2011 Jung-uk Kim <jkim@FreeBSD.org>
* 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.
*/
/*
* 6.5 : Interrupt handling
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/bus.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/mutex.h>
#include <machine/bus.h>
#include <machine/resource.h>
#include <sys/rman.h>
#include <contrib/dev/acpica/include/acpi.h>
#include <contrib/dev/acpica/include/accommon.h>
#include <dev/acpica/acpivar.h>
#define _COMPONENT ACPI_OS_SERVICES
ACPI_MODULE_NAME("INTERRUPT")
MALLOC_DEFINE(M_ACPIINTR, "acpiintr", "ACPI interrupt");
struct acpi_intr {
SLIST_ENTRY(acpi_intr) ai_link;
struct resource *ai_irq;
int ai_rid;
void *ai_handle;
int ai_number;
ACPI_OSD_HANDLER ai_handler;
void *ai_context;
};
static SLIST_HEAD(, acpi_intr) acpi_intr_list =
SLIST_HEAD_INITIALIZER(acpi_intr_list);
static struct mtx acpi_intr_lock;
static UINT32 InterruptOverride;
static void
acpi_intr_init(struct mtx *lock)
{
mtx_init(lock, "ACPI interrupt lock", NULL, MTX_DEF);
}
SYSINIT(acpi_intr, SI_SUB_DRIVERS, SI_ORDER_FIRST, acpi_intr_init,
&acpi_intr_lock);
static int
acpi_intr_handler(void *arg)
{
struct acpi_intr *ai;
ai = arg;
KASSERT(ai != NULL && ai->ai_handler != NULL,
("invalid ACPI interrupt handler"));
if (ai->ai_handler(ai->ai_context) == ACPI_INTERRUPT_HANDLED)
return (FILTER_HANDLED);
return (FILTER_STRAY);
}
ACPI_STATUS
AcpiOsInstallInterruptHandler(UINT32 InterruptNumber,
ACPI_OSD_HANDLER ServiceRoutine, void *Context)
{
struct acpi_softc *sc;
struct acpi_intr *ai, *ap;
ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
sc = devclass_get_softc(devclass_find("acpi"), 0);
KASSERT(sc != NULL && sc->acpi_dev != NULL,
("can't find ACPI device to register interrupt"));
if (InterruptNumber < 0 || InterruptNumber > 255 ||
ServiceRoutine == NULL)
return_ACPI_STATUS (AE_BAD_PARAMETER);
ai = malloc(sizeof(*ai), M_ACPIINTR, M_WAITOK | M_ZERO);
mtx_lock(&acpi_intr_lock);
SLIST_FOREACH(ap, &acpi_intr_list, ai_link) {
if (InterruptNumber == ap->ai_number ||
(InterruptNumber == InterruptOverride &&
InterruptNumber != AcpiGbl_FADT.SciInterrupt)) {
mtx_unlock(&acpi_intr_lock);
return_ACPI_STATUS (AE_ALREADY_EXISTS);
}
if (ai->ai_rid <= ap->ai_rid)
ai->ai_rid = ap->ai_rid + 1;
}
ai->ai_number = InterruptNumber;
ai->ai_handler = ServiceRoutine;
ai->ai_context = Context;
/*
* If the MADT contained an interrupt override directive for the SCI,
* we use that value instead of the one from the FADT.
*/
if (InterruptOverride != 0 &&
InterruptNumber == AcpiGbl_FADT.SciInterrupt) {
device_printf(sc->acpi_dev,
"Overriding SCI from IRQ %u to IRQ %u\n",
InterruptNumber, InterruptOverride);
InterruptNumber = InterruptOverride;
}
/* Set up the interrupt resource. */
bus_set_resource(sc->acpi_dev, SYS_RES_IRQ, ai->ai_rid,
InterruptNumber, 1);
ai->ai_irq = bus_alloc_resource_any(sc->acpi_dev, SYS_RES_IRQ,
&ai->ai_rid, RF_SHAREABLE | RF_ACTIVE);
if (ai->ai_irq == NULL) {
device_printf(sc->acpi_dev, "could not allocate interrupt\n");
goto error;
}
if (bus_setup_intr(sc->acpi_dev, ai->ai_irq,
INTR_TYPE_MISC | INTR_MPSAFE, acpi_intr_handler, NULL, ai,
&ai->ai_handle) != 0) {
device_printf(sc->acpi_dev, "could not set up interrupt\n");
goto error;
}
SLIST_INSERT_HEAD(&acpi_intr_list, ai, ai_link);
mtx_unlock(&acpi_intr_lock);
return_ACPI_STATUS (AE_OK);
error:
mtx_unlock(&acpi_intr_lock);
if (ai->ai_handle != NULL)
bus_teardown_intr(sc->acpi_dev, ai->ai_irq, ai->ai_handle);
if (ai->ai_irq != NULL)
bus_release_resource(sc->acpi_dev, SYS_RES_IRQ, ai->ai_rid,
ai->ai_irq);
bus_delete_resource(sc->acpi_dev, SYS_RES_IRQ, ai->ai_rid);
free(ai, M_ACPIINTR);
return_ACPI_STATUS (AE_ALREADY_EXISTS);
}
ACPI_STATUS
AcpiOsRemoveInterruptHandler(UINT32 InterruptNumber,
ACPI_OSD_HANDLER ServiceRoutine)
{
struct acpi_softc *sc;
struct acpi_intr *ai;
ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
sc = devclass_get_softc(devclass_find("acpi"), 0);
KASSERT(sc != NULL && sc->acpi_dev != NULL,
("can't find ACPI device to deregister interrupt"));
if (InterruptNumber < 0 || InterruptNumber > 255 ||
ServiceRoutine == NULL)
return_ACPI_STATUS (AE_BAD_PARAMETER);
mtx_lock(&acpi_intr_lock);
SLIST_FOREACH(ai, &acpi_intr_list, ai_link)
if (InterruptNumber == ai->ai_number) {
if (ServiceRoutine != ai->ai_handler) {
mtx_unlock(&acpi_intr_lock);
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
SLIST_REMOVE(&acpi_intr_list, ai, acpi_intr, ai_link);
break;
}
mtx_unlock(&acpi_intr_lock);
if (ai == NULL)
return_ACPI_STATUS (AE_NOT_EXIST);
bus_teardown_intr(sc->acpi_dev, ai->ai_irq, ai->ai_handle);
bus_release_resource(sc->acpi_dev, SYS_RES_IRQ, ai->ai_rid, ai->ai_irq);
bus_delete_resource(sc->acpi_dev, SYS_RES_IRQ, ai->ai_rid);
free(ai, M_ACPIINTR);
return_ACPI_STATUS (AE_OK);
}
ACPI_STATUS
acpi_OverrideInterruptLevel(UINT32 InterruptNumber)
{
ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
if (InterruptOverride != 0)
return_ACPI_STATUS (AE_ALREADY_EXISTS);
InterruptOverride = InterruptNumber;
return_ACPI_STATUS (AE_OK);
}
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