1/* $NetBSD: OsdInterrupt.c,v 1.9 2018/03/20 12:14:52 bouyer Exp $ */ 2 3/* 4 * Copyright 2001 Wasabi Systems, Inc. 5 * All rights reserved. 6 * 7 * Written by Jason R. Thorpe for Wasabi Systems, Inc. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed for the NetBSD Project by 20 * Wasabi Systems, Inc. 21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse 22 * or promote products derived from this software without specific prior 23 * written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35 * POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38/* 39 * OS Services Layer 40 * 41 * 6.5: Interrupt Handling 42 */ 43 44#include <sys/cdefs.h> 45__KERNEL_RCSID(0, "$NetBSD: OsdInterrupt.c,v 1.9 2018/03/20 12:14:52 bouyer Exp $"); 46 47#include <sys/param.h> 48#include <sys/malloc.h> 49#include <sys/mutex.h> 50#include <sys/queue.h> 51 52#include <dev/acpi/acpica.h> 53 54#include <machine/acpi_machdep.h> 55 56#define _COMPONENT ACPI_OS_SERVICES 57ACPI_MODULE_NAME("INTERRUPT") 58 59MALLOC_DEFINE(M_ACPI, "acpi", "Advanced Configuration and Power Interface"); 60 61/* 62 * We're lucky -- ACPI uses the same convention for interrupt service 63 * routine return values at NetBSD does -- so we can just ask MD code 64 * to hook it up directly (ACPI interrupts are always level triggered 65 * and shareable, and return 0 for "not handled" and 1 for "handled"). 66 */ 67 68struct acpi_interrupt_handler { 69 LIST_ENTRY(acpi_interrupt_handler) aih_list; 70 UINT32 aih_intrnum; 71 ACPI_OSD_HANDLER aih_func; 72 void *aih_ih; 73}; 74 75static LIST_HEAD(, acpi_interrupt_handler) acpi_interrupt_list = 76 LIST_HEAD_INITIALIZER(&acpi_interrupt_list); 77 78kmutex_t acpi_interrupt_list_mtx; 79 80/* 81 * AcpiOsInstallInterruptHandler: 82 * 83 * Install a handler for a hardware interrupt level. 84 */ 85ACPI_STATUS 86AcpiOsInstallInterruptHandler(UINT32 InterruptNumber, 87 ACPI_OSD_HANDLER ServiceRoutine, void *Context) 88{ 89 return AcpiOsInstallInterruptHandler_xname(InterruptNumber, 90 ServiceRoutine, Context, "acpi SCI"); 91} 92 93ACPI_STATUS 94AcpiOsInstallInterruptHandler_xname(UINT32 InterruptNumber, 95 ACPI_OSD_HANDLER ServiceRoutine, void *Context, const char *xname) 96{ 97 struct acpi_interrupt_handler *aih; 98 ACPI_STATUS rv; 99 100 if (InterruptNumber > 255) 101 return AE_BAD_PARAMETER; 102 if (ServiceRoutine == NULL) 103 return AE_BAD_PARAMETER; 104 105 aih = malloc(sizeof(*aih), M_ACPI, M_NOWAIT); 106 if (aih == NULL) 107 return AE_NO_MEMORY; 108 109 aih->aih_intrnum = InterruptNumber; 110 aih->aih_func = ServiceRoutine; 111 112 rv = acpi_md_OsInstallInterruptHandler(InterruptNumber, 113 ServiceRoutine, Context, &aih->aih_ih, xname); 114 if (rv == AE_OK) { 115 mutex_enter(&acpi_interrupt_list_mtx); 116 LIST_INSERT_HEAD(&acpi_interrupt_list, aih, aih_list); 117 mutex_exit(&acpi_interrupt_list_mtx); 118 } else 119 free(aih, M_ACPI); 120 121 return rv; 122} 123 124/* 125 * AcpiOsRemoveInterruptHandler: 126 * 127 * Remove an interrupt handler. 128 */ 129ACPI_STATUS 130AcpiOsRemoveInterruptHandler(UINT32 InterruptNumber, 131 ACPI_OSD_HANDLER ServiceRoutine) 132{ 133 struct acpi_interrupt_handler *aih; 134 135 if (InterruptNumber > 255) 136 return AE_BAD_PARAMETER; 137 if (ServiceRoutine == NULL) 138 return AE_BAD_PARAMETER; 139 140 mutex_enter(&acpi_interrupt_list_mtx); 141 LIST_FOREACH(aih, &acpi_interrupt_list, aih_list) { 142 if (aih->aih_intrnum == InterruptNumber && 143 aih->aih_func == ServiceRoutine) { 144 LIST_REMOVE(aih, aih_list); 145 mutex_exit(&acpi_interrupt_list_mtx); 146 acpi_md_OsRemoveInterruptHandler(aih->aih_ih); 147 free(aih, M_ACPI); 148 return AE_OK; 149 } 150 } 151 mutex_exit(&acpi_interrupt_list_mtx); 152 return AE_NOT_EXIST; 153} 154