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