sys/dev/acpi/acpica/OsdInterrupt.c

   1 /*      $NetBSD: OsdInterrupt.c,v 1.7 2007/12/15 00:39:25 perry 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 1.7 2007/12/15 00:39:25 perry 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
  57 ACPI_MODULE_NAME("INTERRUPT")
  58
  59 MALLOC_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
  68 struct 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
  75 static LIST_HEAD(, acpi_interrupt_handler) acpi_interrupt_list =
  76     LIST_HEAD_INITIALIZER(&acpi_interrupt_list);
  77
  78 kmutex_t acpi_interrupt_list_mtx;
  79
  80 /*
  81  * AcpiOsInstallInterruptHandler:
  82  *
  83  *      Install a handler for a hardware interrupt level.
  84  */
  85 ACPI_STATUS
  86 AcpiOsInstallInterruptHandler(UINT32 InterruptNumber,
  87     ACPI_OSD_HANDLER ServiceRoutine, void *Context)
  88 {
  89         struct acpi_interrupt_handler *aih;
  90         ACPI_STATUS rv;
  91
  92         if (InterruptNumber > 255)
  93                 return AE_BAD_PARAMETER;
  94         if (ServiceRoutine == NULL)
  95                 return AE_BAD_PARAMETER;
  96
  97         aih = malloc(sizeof(*aih), M_ACPI, M_NOWAIT);
  98         if (aih == NULL)
  99                 return AE_NO_MEMORY;
 100
 101         aih->aih_intrnum = InterruptNumber;
 102         aih->aih_func = ServiceRoutine;
 103
 104         rv = acpi_md_OsInstallInterruptHandler(InterruptNumber,
 105             ServiceRoutine, Context, &aih->aih_ih);
 106         if (rv == AE_OK) {
 107                 mutex_enter(&acpi_interrupt_list_mtx);
 108                 LIST_INSERT_HEAD(&acpi_interrupt_list, aih, aih_list);
 109                 mutex_exit(&acpi_interrupt_list_mtx);
 110         } else
 111                 free(aih, M_ACPI);
 112
 113         return rv;
 114 }
 115
 116 /*
 117  * AcpiOsRemoveInterruptHandler:
 118  *
 119  *      Remove an interrupt handler.
 120  */
 121 ACPI_STATUS
 122 AcpiOsRemoveInterruptHandler(UINT32 InterruptNumber,
 123     ACPI_OSD_HANDLER ServiceRoutine)
 124 {
 125         struct acpi_interrupt_handler *aih;
 126
 127         if (InterruptNumber > 255)
 128                 return AE_BAD_PARAMETER;
 129         if (ServiceRoutine == NULL)
 130                 return AE_BAD_PARAMETER;
 131
 132         mutex_enter(&acpi_interrupt_list_mtx);
 133         LIST_FOREACH(aih, &acpi_interrupt_list, aih_list) {
 134                 if (aih->aih_intrnum == InterruptNumber &&
 135                     aih->aih_func == ServiceRoutine) {
 136                         LIST_REMOVE(aih, aih_list);
 137                         mutex_exit(&acpi_interrupt_list_mtx);
 138                         acpi_md_OsRemoveInterruptHandler(aih->aih_ih);
 139                         free(aih, M_ACPI);
 140                         return AE_OK;
 141                 }
 142         }
 143         mutex_exit(&acpi_interrupt_list_mtx);
 144         return AE_NOT_EXIST;
 145 }