551 lines
16 KiB
C
551 lines
16 KiB
C
/******************************************************************************
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*
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* Module Name: evgpeblk - GPE block creation and initialization.
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2012, 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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#include "acnamesp.h"
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#define _COMPONENT ACPI_EVENTS
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ACPI_MODULE_NAME ("evgpeblk")
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#if (!ACPI_REDUCED_HARDWARE) /* Entire module */
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/* Local prototypes */
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static ACPI_STATUS
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AcpiEvInstallGpeBlock (
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ACPI_GPE_BLOCK_INFO *GpeBlock,
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UINT32 InterruptNumber);
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static ACPI_STATUS
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AcpiEvCreateGpeInfoBlocks (
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ACPI_GPE_BLOCK_INFO *GpeBlock);
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/*******************************************************************************
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*
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* FUNCTION: AcpiEvInstallGpeBlock
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*
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* PARAMETERS: GpeBlock - New GPE block
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* InterruptNumber - Xrupt to be associated with this
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* GPE block
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*
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* RETURN: Status
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*
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* DESCRIPTION: Install new GPE block with mutex support
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*
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******************************************************************************/
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static ACPI_STATUS
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AcpiEvInstallGpeBlock (
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ACPI_GPE_BLOCK_INFO *GpeBlock,
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UINT32 InterruptNumber)
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{
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ACPI_GPE_BLOCK_INFO *NextGpeBlock;
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ACPI_GPE_XRUPT_INFO *GpeXruptBlock;
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ACPI_STATUS Status;
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ACPI_CPU_FLAGS Flags;
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ACPI_FUNCTION_TRACE (EvInstallGpeBlock);
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Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
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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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GpeXruptBlock = AcpiEvGetGpeXruptBlock (InterruptNumber);
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if (!GpeXruptBlock)
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{
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Status = AE_NO_MEMORY;
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goto UnlockAndExit;
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}
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/* Install the new block at the end of the list with lock */
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Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
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if (GpeXruptBlock->GpeBlockListHead)
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{
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NextGpeBlock = GpeXruptBlock->GpeBlockListHead;
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while (NextGpeBlock->Next)
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{
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NextGpeBlock = NextGpeBlock->Next;
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}
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NextGpeBlock->Next = GpeBlock;
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GpeBlock->Previous = NextGpeBlock;
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}
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else
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{
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GpeXruptBlock->GpeBlockListHead = GpeBlock;
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}
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GpeBlock->XruptBlock = GpeXruptBlock;
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AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
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UnlockAndExit:
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Status = AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
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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: AcpiEvDeleteGpeBlock
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*
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* PARAMETERS: GpeBlock - Existing GPE block
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*
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* RETURN: Status
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*
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* DESCRIPTION: Remove a GPE block
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiEvDeleteGpeBlock (
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ACPI_GPE_BLOCK_INFO *GpeBlock)
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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 (EvInstallGpeBlock);
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Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
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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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/* Disable all GPEs in this block */
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Status = AcpiHwDisableGpeBlock (GpeBlock->XruptBlock, GpeBlock, NULL);
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if (!GpeBlock->Previous && !GpeBlock->Next)
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{
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/* This is the last GpeBlock on this interrupt */
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Status = AcpiEvDeleteGpeXrupt (GpeBlock->XruptBlock);
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if (ACPI_FAILURE (Status))
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{
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goto UnlockAndExit;
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}
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}
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else
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{
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/* Remove the block on this interrupt with lock */
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Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
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if (GpeBlock->Previous)
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{
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GpeBlock->Previous->Next = GpeBlock->Next;
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}
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else
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{
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GpeBlock->XruptBlock->GpeBlockListHead = GpeBlock->Next;
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}
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if (GpeBlock->Next)
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{
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GpeBlock->Next->Previous = GpeBlock->Previous;
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}
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AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
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}
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AcpiCurrentGpeCount -= GpeBlock->GpeCount;
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/* Free the GpeBlock */
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ACPI_FREE (GpeBlock->RegisterInfo);
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ACPI_FREE (GpeBlock->EventInfo);
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ACPI_FREE (GpeBlock);
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UnlockAndExit:
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Status = AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
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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: AcpiEvCreateGpeInfoBlocks
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*
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* PARAMETERS: GpeBlock - New GPE block
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*
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* RETURN: Status
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*
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* DESCRIPTION: Create the RegisterInfo and EventInfo blocks for this GPE block
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*
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******************************************************************************/
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static ACPI_STATUS
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AcpiEvCreateGpeInfoBlocks (
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ACPI_GPE_BLOCK_INFO *GpeBlock)
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{
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ACPI_GPE_REGISTER_INFO *GpeRegisterInfo = NULL;
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ACPI_GPE_EVENT_INFO *GpeEventInfo = NULL;
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ACPI_GPE_EVENT_INFO *ThisEvent;
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ACPI_GPE_REGISTER_INFO *ThisRegister;
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UINT32 i;
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UINT32 j;
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ACPI_STATUS Status;
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ACPI_FUNCTION_TRACE (EvCreateGpeInfoBlocks);
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/* Allocate the GPE register information block */
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GpeRegisterInfo = ACPI_ALLOCATE_ZEROED (
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(ACPI_SIZE) GpeBlock->RegisterCount *
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sizeof (ACPI_GPE_REGISTER_INFO));
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if (!GpeRegisterInfo)
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{
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ACPI_ERROR ((AE_INFO,
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"Could not allocate the GpeRegisterInfo table"));
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return_ACPI_STATUS (AE_NO_MEMORY);
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}
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/*
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* Allocate the GPE EventInfo block. There are eight distinct GPEs
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* per register. Initialization to zeros is sufficient.
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*/
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GpeEventInfo = ACPI_ALLOCATE_ZEROED ((ACPI_SIZE) GpeBlock->GpeCount *
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sizeof (ACPI_GPE_EVENT_INFO));
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if (!GpeEventInfo)
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{
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ACPI_ERROR ((AE_INFO,
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"Could not allocate the GpeEventInfo table"));
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Status = AE_NO_MEMORY;
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goto ErrorExit;
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}
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/* Save the new Info arrays in the GPE block */
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GpeBlock->RegisterInfo = GpeRegisterInfo;
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GpeBlock->EventInfo = GpeEventInfo;
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/*
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* Initialize the GPE Register and Event structures. A goal of these
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* tables is to hide the fact that there are two separate GPE register
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* sets in a given GPE hardware block, the status registers occupy the
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* first half, and the enable registers occupy the second half.
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*/
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ThisRegister = GpeRegisterInfo;
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ThisEvent = GpeEventInfo;
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for (i = 0; i < GpeBlock->RegisterCount; i++)
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{
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/* Init the RegisterInfo for this GPE register (8 GPEs) */
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ThisRegister->BaseGpeNumber = (UINT8) (GpeBlock->BlockBaseNumber +
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(i * ACPI_GPE_REGISTER_WIDTH));
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ThisRegister->StatusAddress.Address =
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GpeBlock->BlockAddress.Address + i;
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ThisRegister->EnableAddress.Address =
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GpeBlock->BlockAddress.Address + i + GpeBlock->RegisterCount;
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ThisRegister->StatusAddress.SpaceId = GpeBlock->BlockAddress.SpaceId;
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ThisRegister->EnableAddress.SpaceId = GpeBlock->BlockAddress.SpaceId;
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ThisRegister->StatusAddress.BitWidth = ACPI_GPE_REGISTER_WIDTH;
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ThisRegister->EnableAddress.BitWidth = ACPI_GPE_REGISTER_WIDTH;
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ThisRegister->StatusAddress.BitOffset = 0;
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ThisRegister->EnableAddress.BitOffset = 0;
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/* Init the EventInfo for each GPE within this register */
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for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++)
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{
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ThisEvent->GpeNumber = (UINT8) (ThisRegister->BaseGpeNumber + j);
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ThisEvent->RegisterInfo = ThisRegister;
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ThisEvent++;
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}
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/* Disable all GPEs within this register */
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Status = AcpiHwWrite (0x00, &ThisRegister->EnableAddress);
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if (ACPI_FAILURE (Status))
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{
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goto ErrorExit;
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}
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/* Clear any pending GPE events within this register */
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Status = AcpiHwWrite (0xFF, &ThisRegister->StatusAddress);
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if (ACPI_FAILURE (Status))
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{
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goto ErrorExit;
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}
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ThisRegister++;
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}
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return_ACPI_STATUS (AE_OK);
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ErrorExit:
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if (GpeRegisterInfo)
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{
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ACPI_FREE (GpeRegisterInfo);
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}
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if (GpeEventInfo)
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{
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ACPI_FREE (GpeEventInfo);
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}
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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: AcpiEvCreateGpeBlock
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*
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* PARAMETERS: GpeDevice - Handle to the parent GPE block
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* GpeBlockAddress - Address and SpaceID
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* RegisterCount - Number of GPE register pairs in the block
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* GpeBlockBaseNumber - Starting GPE number for the block
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* InterruptNumber - H/W interrupt for the block
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* ReturnGpeBlock - Where the new block descriptor is returned
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*
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* RETURN: Status
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*
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* DESCRIPTION: Create and Install a block of GPE registers. All GPEs within
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* the block are disabled at exit.
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* Note: Assumes namespace is locked.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiEvCreateGpeBlock (
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ACPI_NAMESPACE_NODE *GpeDevice,
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ACPI_GENERIC_ADDRESS *GpeBlockAddress,
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UINT32 RegisterCount,
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UINT8 GpeBlockBaseNumber,
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UINT32 InterruptNumber,
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ACPI_GPE_BLOCK_INFO **ReturnGpeBlock)
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{
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ACPI_STATUS Status;
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ACPI_GPE_BLOCK_INFO *GpeBlock;
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ACPI_GPE_WALK_INFO WalkInfo;
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ACPI_FUNCTION_TRACE (EvCreateGpeBlock);
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if (!RegisterCount)
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{
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return_ACPI_STATUS (AE_OK);
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}
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/* Allocate a new GPE block */
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GpeBlock = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_GPE_BLOCK_INFO));
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if (!GpeBlock)
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{
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return_ACPI_STATUS (AE_NO_MEMORY);
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}
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/* Initialize the new GPE block */
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GpeBlock->Node = GpeDevice;
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GpeBlock->GpeCount = (UINT16) (RegisterCount * ACPI_GPE_REGISTER_WIDTH);
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GpeBlock->Initialized = FALSE;
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GpeBlock->RegisterCount = RegisterCount;
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GpeBlock->BlockBaseNumber = GpeBlockBaseNumber;
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ACPI_MEMCPY (&GpeBlock->BlockAddress, GpeBlockAddress,
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sizeof (ACPI_GENERIC_ADDRESS));
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/*
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* Create the RegisterInfo and EventInfo sub-structures
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* Note: disables and clears all GPEs in the block
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*/
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Status = AcpiEvCreateGpeInfoBlocks (GpeBlock);
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if (ACPI_FAILURE (Status))
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{
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ACPI_FREE (GpeBlock);
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return_ACPI_STATUS (Status);
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}
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/* Install the new block in the global lists */
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Status = AcpiEvInstallGpeBlock (GpeBlock, InterruptNumber);
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if (ACPI_FAILURE (Status))
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{
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ACPI_FREE (GpeBlock);
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return_ACPI_STATUS (Status);
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}
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AcpiGbl_AllGpesInitialized = FALSE;
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/* Find all GPE methods (_Lxx or_Exx) for this block */
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WalkInfo.GpeBlock = GpeBlock;
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WalkInfo.GpeDevice = GpeDevice;
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WalkInfo.ExecuteByOwnerId = FALSE;
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Status = AcpiNsWalkNamespace (ACPI_TYPE_METHOD, GpeDevice,
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ACPI_UINT32_MAX, ACPI_NS_WALK_NO_UNLOCK,
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AcpiEvMatchGpeMethod, NULL, &WalkInfo, NULL);
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/* Return the new block */
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if (ReturnGpeBlock)
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{
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(*ReturnGpeBlock) = GpeBlock;
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}
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ACPI_DEBUG_PRINT ((ACPI_DB_INIT,
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"GPE %02X to %02X [%4.4s] %u regs on int 0x%X\n",
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(UINT32) GpeBlock->BlockBaseNumber,
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(UINT32) (GpeBlock->BlockBaseNumber + (GpeBlock->GpeCount - 1)),
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GpeDevice->Name.Ascii, GpeBlock->RegisterCount,
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InterruptNumber));
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/* Update global count of currently available GPEs */
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AcpiCurrentGpeCount += GpeBlock->GpeCount;
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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: AcpiEvInitializeGpeBlock
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*
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* PARAMETERS: ACPI_GPE_CALLBACK
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*
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* RETURN: Status
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*
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* DESCRIPTION: Initialize and enable a GPE block. Enable GPEs that have
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* associated methods.
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* Note: Assumes namespace is locked.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiEvInitializeGpeBlock (
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ACPI_GPE_XRUPT_INFO *GpeXruptInfo,
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ACPI_GPE_BLOCK_INFO *GpeBlock,
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void *Ignored)
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{
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ACPI_STATUS Status;
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ACPI_GPE_EVENT_INFO *GpeEventInfo;
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UINT32 GpeEnabledCount;
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UINT32 GpeIndex;
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UINT32 i;
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UINT32 j;
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ACPI_FUNCTION_TRACE (EvInitializeGpeBlock);
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/*
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* Ignore a null GPE block (e.g., if no GPE block 1 exists), and
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* any GPE blocks that have been initialized already.
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*/
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if (!GpeBlock || GpeBlock->Initialized)
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{
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return_ACPI_STATUS (AE_OK);
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}
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/*
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* Enable all GPEs that have a corresponding method and have the
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* ACPI_GPE_CAN_WAKE flag unset. Any other GPEs within this block
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* must be enabled via the acpi_enable_gpe() interface.
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*/
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GpeEnabledCount = 0;
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for (i = 0; i < GpeBlock->RegisterCount; i++)
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{
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for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++)
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{
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/* Get the info block for this particular GPE */
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GpeIndex = (i * ACPI_GPE_REGISTER_WIDTH) + j;
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GpeEventInfo = &GpeBlock->EventInfo[GpeIndex];
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/*
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* Ignore GPEs that have no corresponding _Lxx/_Exx method
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* and GPEs that are used to wake the system
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*/
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if (((GpeEventInfo->Flags & ACPI_GPE_DISPATCH_MASK) == ACPI_GPE_DISPATCH_NONE) ||
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((GpeEventInfo->Flags & ACPI_GPE_DISPATCH_MASK) == ACPI_GPE_DISPATCH_HANDLER) ||
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(GpeEventInfo->Flags & ACPI_GPE_CAN_WAKE))
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{
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continue;
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}
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Status = AcpiEvAddGpeReference (GpeEventInfo);
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if (ACPI_FAILURE (Status))
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{
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ACPI_EXCEPTION ((AE_INFO, Status,
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"Could not enable GPE 0x%02X",
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GpeIndex + GpeBlock->BlockBaseNumber));
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continue;
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}
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GpeEnabledCount++;
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}
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}
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if (GpeEnabledCount)
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{
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ACPI_DEBUG_PRINT ((ACPI_DB_INIT,
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"Enabled %u GPEs in this block\n", GpeEnabledCount));
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}
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GpeBlock->Initialized = TRUE;
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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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