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 */ 29 30 /* 31 * Interrupt Handling 32 */ 33 34 #include <sys/param.h> 35 #include <sys/kernel.h> 36 #include <sys/bus.h> 37 #include <sys/rman.h> 38 #include <sys/thread2.h> 39 #include <sys/machintr.h> 40 41 #include "acpi.h" 42 #include "accommon.h" 43 #include <dev/acpica/acpivar.h> 44 #include <dev/acpica/acpi_sci_var.h> 45 46 #define _COMPONENT ACPI_OS_SERVICES 47 ACPI_MODULE_NAME("INTERRUPT") 48 49 static void InterruptWrapper(void *arg); 50 51 static ACPI_OSD_HANDLER InterruptHandler; 52 53 ACPI_STATUS 54 AcpiOsInstallInterruptHandler(UINT32 InterruptNumber, 55 ACPI_OSD_HANDLER ServiceRoutine, void *Context) 56 { 57 struct acpi_softc *sc; 58 u_int flags; 59 60 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 61 62 if ((sc = devclass_get_softc(devclass_find("acpi"), 0)) == NULL) 63 panic("can't find ACPI device to register interrupt"); 64 if (sc->acpi_dev == NULL) 65 panic("acpi softc has invalid device"); 66 67 /* 68 * Configure SCI mode 69 */ 70 acpi_sci_config(); 71 72 /* 73 * This could happen: 74 * - SCI is disabled by user 75 * - No suitable interrupt mode for SCI 76 */ 77 if (!acpi_sci_enabled()) 78 return_ACPI_STATUS (AE_OK); 79 80 if (InterruptNumber < 0 || InterruptNumber > 255) 81 return_ACPI_STATUS (AE_BAD_PARAMETER); 82 if (ServiceRoutine == NULL) 83 return_ACPI_STATUS (AE_BAD_PARAMETER); 84 if (InterruptHandler != NULL) { 85 device_printf(sc->acpi_dev, "interrupt handler already installed\n"); 86 return_ACPI_STATUS (AE_ALREADY_EXISTS); 87 } 88 InterruptHandler = ServiceRoutine; 89 90 flags = RF_ACTIVE; 91 if (acpi_sci_pci_shareable()) 92 flags |= RF_SHAREABLE; 93 94 /* Set up the interrupt resource. */ 95 sc->acpi_irq_rid = 0; 96 bus_set_resource(sc->acpi_dev, SYS_RES_IRQ, 0, InterruptNumber, 1, 97 machintr_legacy_intr_cpuid(InterruptNumber)); 98 sc->acpi_irq = bus_alloc_resource_any(sc->acpi_dev, SYS_RES_IRQ, 99 &sc->acpi_irq_rid, flags); 100 if (sc->acpi_irq == NULL) { 101 device_printf(sc->acpi_dev, "could not allocate interrupt\n"); 102 goto error; 103 } 104 if (bus_setup_intr(sc->acpi_dev, sc->acpi_irq, 0, 105 InterruptWrapper, Context, &sc->acpi_irq_handle, NULL)) { 106 device_printf(sc->acpi_dev, "could not set up interrupt\n"); 107 goto error; 108 } 109 110 return_ACPI_STATUS (AE_OK); 111 112 error: 113 if (sc->acpi_irq_handle) 114 bus_teardown_intr(sc->acpi_dev, sc->acpi_irq, sc->acpi_irq_handle); 115 sc->acpi_irq_handle = NULL; 116 if (sc->acpi_irq) 117 bus_release_resource(sc->acpi_dev, SYS_RES_IRQ, 0, sc->acpi_irq); 118 sc->acpi_irq = NULL; 119 bus_delete_resource(sc->acpi_dev, SYS_RES_IRQ, 0); 120 InterruptHandler = NULL; 121 122 return_ACPI_STATUS (AE_ALREADY_EXISTS); 123 } 124 125 ACPI_STATUS 126 AcpiOsRemoveInterruptHandler(UINT32 InterruptNumber, ACPI_OSD_HANDLER ServiceRoutine) 127 { 128 struct acpi_softc *sc; 129 130 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 131 132 if (!acpi_sci_enabled()) 133 return_ACPI_STATUS (AE_OK); 134 135 if (InterruptNumber > 255 || ServiceRoutine == NULL) 136 return_ACPI_STATUS (AE_BAD_PARAMETER); 137 138 if ((sc = devclass_get_softc(devclass_find("acpi"), 0)) == NULL) 139 panic("can't find ACPI device to deregister interrupt"); 140 141 if (sc->acpi_irq == NULL) 142 return_ACPI_STATUS (AE_NOT_EXIST); 143 144 bus_teardown_intr(sc->acpi_dev, sc->acpi_irq, sc->acpi_irq_handle); 145 bus_release_resource(sc->acpi_dev, SYS_RES_IRQ, 0, sc->acpi_irq); 146 bus_delete_resource(sc->acpi_dev, SYS_RES_IRQ, 0); 147 148 sc->acpi_irq = NULL; 149 InterruptHandler = NULL; 150 151 return_ACPI_STATUS (AE_OK); 152 } 153 154 static void 155 InterruptWrapper(void *arg) 156 { 157 crit_enter(); 158 InterruptHandler(arg); 159 crit_exit(); 160 } 161