445 lines
12 KiB
C
445 lines
12 KiB
C
/******************************************************************************
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*
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* Module Name: evgpeutil - GPE utilities
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2013, Intel Corp.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*/
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#include "acpi.h"
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#include "accommon.h"
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#include "acevents.h"
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#define _COMPONENT ACPI_EVENTS
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ACPI_MODULE_NAME ("evgpeutil")
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#if (!ACPI_REDUCED_HARDWARE) /* Entire module */
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/*******************************************************************************
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*
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* FUNCTION: AcpiEvWalkGpeList
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*
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* PARAMETERS: GpeWalkCallback - Routine called for each GPE block
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* Context - Value passed to callback
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*
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* RETURN: Status
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*
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* DESCRIPTION: Walk the GPE lists.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiEvWalkGpeList (
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ACPI_GPE_CALLBACK GpeWalkCallback,
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void *Context)
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{
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ACPI_GPE_BLOCK_INFO *GpeBlock;
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ACPI_GPE_XRUPT_INFO *GpeXruptInfo;
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ACPI_STATUS Status = AE_OK;
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ACPI_CPU_FLAGS Flags;
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ACPI_FUNCTION_TRACE (EvWalkGpeList);
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Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
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/* Walk the interrupt level descriptor list */
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GpeXruptInfo = AcpiGbl_GpeXruptListHead;
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while (GpeXruptInfo)
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{
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/* Walk all Gpe Blocks attached to this interrupt level */
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GpeBlock = GpeXruptInfo->GpeBlockListHead;
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while (GpeBlock)
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{
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/* One callback per GPE block */
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Status = GpeWalkCallback (GpeXruptInfo, GpeBlock, Context);
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if (ACPI_FAILURE (Status))
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{
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if (Status == AE_CTRL_END) /* Callback abort */
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{
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Status = AE_OK;
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}
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goto UnlockAndExit;
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}
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GpeBlock = GpeBlock->Next;
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}
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GpeXruptInfo = GpeXruptInfo->Next;
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}
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UnlockAndExit:
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AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
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return_ACPI_STATUS (Status);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiEvValidGpeEvent
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*
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* PARAMETERS: GpeEventInfo - Info for this GPE
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*
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* RETURN: TRUE if the GpeEvent is valid
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*
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* DESCRIPTION: Validate a GPE event. DO NOT CALL FROM INTERRUPT LEVEL.
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* Should be called only when the GPE lists are semaphore locked
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* and not subject to change.
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*
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******************************************************************************/
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BOOLEAN
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AcpiEvValidGpeEvent (
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ACPI_GPE_EVENT_INFO *GpeEventInfo)
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{
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ACPI_GPE_XRUPT_INFO *GpeXruptBlock;
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ACPI_GPE_BLOCK_INFO *GpeBlock;
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ACPI_FUNCTION_ENTRY ();
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/* No need for spin lock since we are not changing any list elements */
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/* Walk the GPE interrupt levels */
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GpeXruptBlock = AcpiGbl_GpeXruptListHead;
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while (GpeXruptBlock)
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{
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GpeBlock = GpeXruptBlock->GpeBlockListHead;
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/* Walk the GPE blocks on this interrupt level */
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while (GpeBlock)
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{
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if ((&GpeBlock->EventInfo[0] <= GpeEventInfo) &&
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(&GpeBlock->EventInfo[GpeBlock->GpeCount] > GpeEventInfo))
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{
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return (TRUE);
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}
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GpeBlock = GpeBlock->Next;
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}
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GpeXruptBlock = GpeXruptBlock->Next;
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}
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return (FALSE);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiEvGetGpeDevice
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*
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* PARAMETERS: GPE_WALK_CALLBACK
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*
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* RETURN: Status
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*
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* DESCRIPTION: Matches the input GPE index (0-CurrentGpeCount) with a GPE
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* block device. NULL if the GPE is one of the FADT-defined GPEs.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiEvGetGpeDevice (
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ACPI_GPE_XRUPT_INFO *GpeXruptInfo,
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ACPI_GPE_BLOCK_INFO *GpeBlock,
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void *Context)
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{
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ACPI_GPE_DEVICE_INFO *Info = Context;
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/* Increment Index by the number of GPEs in this block */
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Info->NextBlockBaseIndex += GpeBlock->GpeCount;
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if (Info->Index < Info->NextBlockBaseIndex)
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{
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/*
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* The GPE index is within this block, get the node. Leave the node
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* NULL for the FADT-defined GPEs
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*/
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if ((GpeBlock->Node)->Type == ACPI_TYPE_DEVICE)
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{
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Info->GpeDevice = GpeBlock->Node;
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}
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Info->Status = AE_OK;
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return (AE_CTRL_END);
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}
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return (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiEvGetGpeXruptBlock
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*
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* PARAMETERS: InterruptNumber - Interrupt for a GPE block
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*
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* RETURN: A GPE interrupt block
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*
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* DESCRIPTION: Get or Create a GPE interrupt block. There is one interrupt
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* block per unique interrupt level used for GPEs. Should be
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* called only when the GPE lists are semaphore locked and not
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* subject to change.
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*
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******************************************************************************/
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ACPI_GPE_XRUPT_INFO *
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AcpiEvGetGpeXruptBlock (
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UINT32 InterruptNumber)
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{
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ACPI_GPE_XRUPT_INFO *NextGpeXrupt;
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ACPI_GPE_XRUPT_INFO *GpeXrupt;
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ACPI_STATUS Status;
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ACPI_CPU_FLAGS Flags;
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ACPI_FUNCTION_TRACE (EvGetGpeXruptBlock);
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/* No need for lock since we are not changing any list elements here */
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NextGpeXrupt = AcpiGbl_GpeXruptListHead;
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while (NextGpeXrupt)
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{
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if (NextGpeXrupt->InterruptNumber == InterruptNumber)
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{
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return_PTR (NextGpeXrupt);
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}
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NextGpeXrupt = NextGpeXrupt->Next;
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}
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/* Not found, must allocate a new xrupt descriptor */
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GpeXrupt = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_GPE_XRUPT_INFO));
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if (!GpeXrupt)
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{
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return_PTR (NULL);
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}
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GpeXrupt->InterruptNumber = InterruptNumber;
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/* Install new interrupt descriptor with spin lock */
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Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
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if (AcpiGbl_GpeXruptListHead)
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{
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NextGpeXrupt = AcpiGbl_GpeXruptListHead;
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while (NextGpeXrupt->Next)
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{
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NextGpeXrupt = NextGpeXrupt->Next;
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}
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NextGpeXrupt->Next = GpeXrupt;
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GpeXrupt->Previous = NextGpeXrupt;
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}
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else
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{
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AcpiGbl_GpeXruptListHead = GpeXrupt;
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}
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AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
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/* Install new interrupt handler if not SCI_INT */
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if (InterruptNumber != AcpiGbl_FADT.SciInterrupt)
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{
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Status = AcpiOsInstallInterruptHandler (InterruptNumber,
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AcpiEvGpeXruptHandler, GpeXrupt);
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if (ACPI_FAILURE (Status))
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{
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ACPI_ERROR ((AE_INFO,
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"Could not install GPE interrupt handler at level 0x%X",
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InterruptNumber));
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return_PTR (NULL);
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}
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}
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return_PTR (GpeXrupt);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiEvDeleteGpeXrupt
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*
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* PARAMETERS: GpeXrupt - A GPE interrupt info block
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*
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* RETURN: Status
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*
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* DESCRIPTION: Remove and free a GpeXrupt block. Remove an associated
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* interrupt handler if not the SCI interrupt.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiEvDeleteGpeXrupt (
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ACPI_GPE_XRUPT_INFO *GpeXrupt)
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{
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ACPI_STATUS Status;
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ACPI_CPU_FLAGS Flags;
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ACPI_FUNCTION_TRACE (EvDeleteGpeXrupt);
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/* We never want to remove the SCI interrupt handler */
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if (GpeXrupt->InterruptNumber == AcpiGbl_FADT.SciInterrupt)
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{
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GpeXrupt->GpeBlockListHead = NULL;
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return_ACPI_STATUS (AE_OK);
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}
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/* Disable this interrupt */
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Status = AcpiOsRemoveInterruptHandler (
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GpeXrupt->InterruptNumber, AcpiEvGpeXruptHandler);
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if (ACPI_FAILURE (Status))
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{
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return_ACPI_STATUS (Status);
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}
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/* Unlink the interrupt block with lock */
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Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
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if (GpeXrupt->Previous)
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{
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GpeXrupt->Previous->Next = GpeXrupt->Next;
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}
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else
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{
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/* No previous, update list head */
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AcpiGbl_GpeXruptListHead = GpeXrupt->Next;
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}
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if (GpeXrupt->Next)
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{
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GpeXrupt->Next->Previous = GpeXrupt->Previous;
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}
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AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
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/* Free the block */
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ACPI_FREE (GpeXrupt);
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return_ACPI_STATUS (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiEvDeleteGpeHandlers
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*
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* PARAMETERS: GpeXruptInfo - GPE Interrupt info
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* GpeBlock - Gpe Block info
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*
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* RETURN: Status
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*
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* DESCRIPTION: Delete all Handler objects found in the GPE data structs.
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* Used only prior to termination.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiEvDeleteGpeHandlers (
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ACPI_GPE_XRUPT_INFO *GpeXruptInfo,
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ACPI_GPE_BLOCK_INFO *GpeBlock,
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void *Context)
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{
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ACPI_GPE_EVENT_INFO *GpeEventInfo;
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ACPI_GPE_NOTIFY_INFO *Notify;
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ACPI_GPE_NOTIFY_INFO *Next;
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UINT32 i;
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UINT32 j;
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ACPI_FUNCTION_TRACE (EvDeleteGpeHandlers);
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/* Examine each GPE Register within the block */
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for (i = 0; i < GpeBlock->RegisterCount; i++)
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{
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/* Now look at the individual GPEs in this byte register */
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for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++)
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{
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GpeEventInfo = &GpeBlock->EventInfo[((ACPI_SIZE) i *
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ACPI_GPE_REGISTER_WIDTH) + j];
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if ((GpeEventInfo->Flags & ACPI_GPE_DISPATCH_MASK) ==
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ACPI_GPE_DISPATCH_HANDLER)
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{
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/* Delete an installed handler block */
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ACPI_FREE (GpeEventInfo->Dispatch.Handler);
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GpeEventInfo->Dispatch.Handler = NULL;
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GpeEventInfo->Flags &= ~ACPI_GPE_DISPATCH_MASK;
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}
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else if ((GpeEventInfo->Flags & ACPI_GPE_DISPATCH_MASK) ==
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ACPI_GPE_DISPATCH_NOTIFY)
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{
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/* Delete the implicit notification device list */
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Notify = GpeEventInfo->Dispatch.NotifyList;
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while (Notify)
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{
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Next = Notify->Next;
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ACPI_FREE (Notify);
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Notify = Next;
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}
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GpeEventInfo->Dispatch.NotifyList = NULL;
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GpeEventInfo->Flags &= ~ACPI_GPE_DISPATCH_MASK;
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}
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}
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}
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return_ACPI_STATUS (AE_OK);
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}
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#endif /* !ACPI_REDUCED_HARDWARE */
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