/*- * Copyright (c) 2000 Michael Smith * Copyright (c) 2000 BSDi * Copyright (c) 2011 Jung-uk Kim * 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 __FBSDID("$FreeBSD$"); #include #include #include #include #include #include #include #include #include #include #include #include #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); } static void acpi_intr_destroy(device_t dev, struct acpi_intr *ai) { if (ai->ai_handle != NULL) bus_teardown_intr(dev, ai->ai_irq, ai->ai_handle); if (ai->ai_irq != NULL) bus_release_resource(dev, SYS_RES_IRQ, ai->ai_rid, ai->ai_irq); bus_delete_resource(dev, SYS_RES_IRQ, ai->ai_rid); free(ai, M_ACPIINTR); } 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 > 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); free(ai, M_ACPIINTR); 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; SLIST_INSERT_HEAD(&acpi_intr_list, ai, ai_link); mtx_unlock(&acpi_intr_lock); /* * 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; } return_ACPI_STATUS (AE_OK); error: mtx_lock(&acpi_intr_lock); SLIST_REMOVE(&acpi_intr_list, ai, acpi_intr, ai_link); mtx_unlock(&acpi_intr_lock); acpi_intr_destroy(sc->acpi_dev, ai); 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 > 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); acpi_intr_destroy(sc->acpi_dev, ai); 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); }