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OsdInterrupt.c revision 1.3 
      1 /*	$NetBSD: OsdInterrupt.c,v 1.3 2007/02/18 23:40:07 xtraeme 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 1.3 2007/02/18 23:40:07 xtraeme 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 static kmutex_t acpi_interrupt_list_mtx;
     78 
     79 #define	ACPI_INTERRUPT_LIST_LOCK()					\
     80 	mutex_enter(&acpi_interrupt_list_mtx)
     81 
     82 #define	ACPI_INTERRUPT_LIST_UNLOCK()					\
     83 	mutex_exit(&acpi_interrupt_list_mtx)
     84 
     85 /*
     86  * AcpiOsInstallInterruptHandler:
     87  *
     88  *	Install a handler for a hardware interrupt level.
     89  */
     90 ACPI_STATUS
     91 AcpiOsInstallInterruptHandler(UINT32 InterruptNumber,
     92     ACPI_OSD_HANDLER ServiceRoutine, void *Context)
     93 {
     94 	struct acpi_interrupt_handler *aih;
     95 	ACPI_STATUS rv;
     96 
     97 	ACPI_FUNCTION_TRACE(__FUNCTION__);
     98 
     99 	if (InterruptNumber > 255)
    100 		return_ACPI_STATUS(AE_BAD_PARAMETER);
    101 	if (ServiceRoutine == NULL)
    102 		return_ACPI_STATUS(AE_BAD_PARAMETER);
    103 
    104 	aih = malloc(sizeof(*aih), M_ACPI, M_NOWAIT);
    105 	if (aih == NULL)
    106 		return_ACPI_STATUS(AE_NO_MEMORY);
    107 
    108 	aih->aih_intrnum = InterruptNumber;
    109 	aih->aih_func = ServiceRoutine;
    110 
    111 	rv = acpi_md_OsInstallInterruptHandler(InterruptNumber,
    112 	    ServiceRoutine, Context, &aih->aih_ih);
    113 	if (rv == AE_OK) {
    114 		ACPI_INTERRUPT_LIST_LOCK();
    115 		LIST_INSERT_HEAD(&acpi_interrupt_list, aih, aih_list);
    116 		ACPI_INTERRUPT_LIST_UNLOCK();
    117 	} else
    118 		free(aih, M_ACPI);
    119 
    120 	return_ACPI_STATUS(rv);
    121 }
    122 
    123 /*
    124  * AcpiOsRemoveInterruptHandler:
    125  *
    126  *	Remove an interrupt handler.
    127  */
    128 ACPI_STATUS
    129 AcpiOsRemoveInterruptHandler(UINT32 InterruptNumber,
    130     ACPI_OSD_HANDLER ServiceRoutine)
    131 {
    132 	struct acpi_interrupt_handler *aih;
    133 
    134 	ACPI_FUNCTION_TRACE(__FUNCTION__);
    135 
    136 	if (InterruptNumber > 255)
    137 		return_ACPI_STATUS(AE_BAD_PARAMETER);
    138 	if (ServiceRoutine == NULL)
    139 		return_ACPI_STATUS(AE_BAD_PARAMETER);
    140 
    141 	ACPI_INTERRUPT_LIST_LOCK();
    142 	LIST_FOREACH(aih, &acpi_interrupt_list, aih_list) {
    143 		if (aih->aih_intrnum == InterruptNumber &&
    144 		    aih->aih_func == ServiceRoutine) {
    145 			LIST_REMOVE(aih, aih_list);
    146 			ACPI_INTERRUPT_LIST_UNLOCK();
    147 			acpi_md_OsRemoveInterruptHandler(aih->aih_ih);
    148 			free(aih, M_ACPI);
    149 			return_ACPI_STATUS(AE_OK);
    150 		}
    151 	}
    152 	ACPI_INTERRUPT_LIST_UNLOCK();
    153 	return_ACPI_STATUS(AE_NOT_EXIST);
    154 }
    155