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/******************************************************************************
*
* Module Name: evgpeblk - GPE block creation and initialization.
*
*****************************************************************************/
/*
* Copyright (C) 2000 - 2011, Intel Corp.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification.
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
* substantially similar to the "NO WARRANTY" disclaimer below
* ("Disclaimer") and any redistribution must be conditioned upon
* including a substantially similar Disclaimer requirement for further
* binary redistribution.
* 3. Neither the names of the above-listed copyright holders nor the names
* of any contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* NO WARRANTY
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES.
*/
#include <contrib/dev/acpica/include/acpi.h>
#include <contrib/dev/acpica/include/accommon.h>
#include <contrib/dev/acpica/include/acevents.h>
#include <contrib/dev/acpica/include/acnamesp.h>
#define _COMPONENT ACPI_EVENTS
ACPI_MODULE_NAME ("evgpeblk")
/* Local prototypes */
static ACPI_STATUS
AcpiEvInstallGpeBlock (
ACPI_GPE_BLOCK_INFO *GpeBlock,
UINT32 InterruptNumber);
static ACPI_STATUS
AcpiEvCreateGpeInfoBlocks (
ACPI_GPE_BLOCK_INFO *GpeBlock);
/*******************************************************************************
*
* FUNCTION: AcpiEvInstallGpeBlock
*
* PARAMETERS: GpeBlock - New GPE block
* InterruptNumber - Xrupt to be associated with this
* GPE block
*
* RETURN: Status
*
* DESCRIPTION: Install new GPE block with mutex support
*
******************************************************************************/
static ACPI_STATUS
AcpiEvInstallGpeBlock (
ACPI_GPE_BLOCK_INFO *GpeBlock,
UINT32 InterruptNumber)
{
ACPI_GPE_BLOCK_INFO *NextGpeBlock;
ACPI_GPE_XRUPT_INFO *GpeXruptBlock;
ACPI_STATUS Status;
ACPI_CPU_FLAGS Flags;
ACPI_FUNCTION_TRACE (EvInstallGpeBlock);
Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
GpeXruptBlock = AcpiEvGetGpeXruptBlock (InterruptNumber);
if (!GpeXruptBlock)
{
Status = AE_NO_MEMORY;
goto UnlockAndExit;
}
/* Install the new block at the end of the list with lock */
Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
if (GpeXruptBlock->GpeBlockListHead)
{
NextGpeBlock = GpeXruptBlock->GpeBlockListHead;
while (NextGpeBlock->Next)
{
NextGpeBlock = NextGpeBlock->Next;
}
NextGpeBlock->Next = GpeBlock;
GpeBlock->Previous = NextGpeBlock;
}
else
{
GpeXruptBlock->GpeBlockListHead = GpeBlock;
}
GpeBlock->XruptBlock = GpeXruptBlock;
AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
UnlockAndExit:
Status = AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
return_ACPI_STATUS (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiEvDeleteGpeBlock
*
* PARAMETERS: GpeBlock - Existing GPE block
*
* RETURN: Status
*
* DESCRIPTION: Remove a GPE block
*
******************************************************************************/
ACPI_STATUS
AcpiEvDeleteGpeBlock (
ACPI_GPE_BLOCK_INFO *GpeBlock)
{
ACPI_STATUS Status;
ACPI_CPU_FLAGS Flags;
ACPI_FUNCTION_TRACE (EvInstallGpeBlock);
Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/* Disable all GPEs in this block */
Status = AcpiHwDisableGpeBlock (GpeBlock->XruptBlock, GpeBlock, NULL);
if (!GpeBlock->Previous && !GpeBlock->Next)
{
/* This is the last GpeBlock on this interrupt */
Status = AcpiEvDeleteGpeXrupt (GpeBlock->XruptBlock);
if (ACPI_FAILURE (Status))
{
goto UnlockAndExit;
}
}
else
{
/* Remove the block on this interrupt with lock */
Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
if (GpeBlock->Previous)
{
GpeBlock->Previous->Next = GpeBlock->Next;
}
else
{
GpeBlock->XruptBlock->GpeBlockListHead = GpeBlock->Next;
}
if (GpeBlock->Next)
{
GpeBlock->Next->Previous = GpeBlock->Previous;
}
AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
}
AcpiCurrentGpeCount -= GpeBlock->GpeCount;
/* Free the GpeBlock */
ACPI_FREE (GpeBlock->RegisterInfo);
ACPI_FREE (GpeBlock->EventInfo);
ACPI_FREE (GpeBlock);
UnlockAndExit:
Status = AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
return_ACPI_STATUS (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiEvCreateGpeInfoBlocks
*
* PARAMETERS: GpeBlock - New GPE block
*
* RETURN: Status
*
* DESCRIPTION: Create the RegisterInfo and EventInfo blocks for this GPE block
*
******************************************************************************/
static ACPI_STATUS
AcpiEvCreateGpeInfoBlocks (
ACPI_GPE_BLOCK_INFO *GpeBlock)
{
ACPI_GPE_REGISTER_INFO *GpeRegisterInfo = NULL;
ACPI_GPE_EVENT_INFO *GpeEventInfo = NULL;
ACPI_GPE_EVENT_INFO *ThisEvent;
ACPI_GPE_REGISTER_INFO *ThisRegister;
UINT32 i;
UINT32 j;
ACPI_STATUS Status;
ACPI_FUNCTION_TRACE (EvCreateGpeInfoBlocks);
/* Allocate the GPE register information block */
GpeRegisterInfo = ACPI_ALLOCATE_ZEROED (
(ACPI_SIZE) GpeBlock->RegisterCount *
sizeof (ACPI_GPE_REGISTER_INFO));
if (!GpeRegisterInfo)
{
ACPI_ERROR ((AE_INFO,
"Could not allocate the GpeRegisterInfo table"));
return_ACPI_STATUS (AE_NO_MEMORY);
}
/*
* Allocate the GPE EventInfo block. There are eight distinct GPEs
* per register. Initialization to zeros is sufficient.
*/
GpeEventInfo = ACPI_ALLOCATE_ZEROED ((ACPI_SIZE) GpeBlock->GpeCount *
sizeof (ACPI_GPE_EVENT_INFO));
if (!GpeEventInfo)
{
ACPI_ERROR ((AE_INFO,
"Could not allocate the GpeEventInfo table"));
Status = AE_NO_MEMORY;
goto ErrorExit;
}
/* Save the new Info arrays in the GPE block */
GpeBlock->RegisterInfo = GpeRegisterInfo;
GpeBlock->EventInfo = GpeEventInfo;
/*
* Initialize the GPE Register and Event structures. A goal of these
* tables is to hide the fact that there are two separate GPE register
* sets in a given GPE hardware block, the status registers occupy the
* first half, and the enable registers occupy the second half.
*/
ThisRegister = GpeRegisterInfo;
ThisEvent = GpeEventInfo;
for (i = 0; i < GpeBlock->RegisterCount; i++)
{
/* Init the RegisterInfo for this GPE register (8 GPEs) */
ThisRegister->BaseGpeNumber = (UINT8) (GpeBlock->BlockBaseNumber +
(i * ACPI_GPE_REGISTER_WIDTH));
ThisRegister->StatusAddress.Address =
GpeBlock->BlockAddress.Address + i;
ThisRegister->EnableAddress.Address =
GpeBlock->BlockAddress.Address + i + GpeBlock->RegisterCount;
ThisRegister->StatusAddress.SpaceId = GpeBlock->BlockAddress.SpaceId;
ThisRegister->EnableAddress.SpaceId = GpeBlock->BlockAddress.SpaceId;
ThisRegister->StatusAddress.BitWidth = ACPI_GPE_REGISTER_WIDTH;
ThisRegister->EnableAddress.BitWidth = ACPI_GPE_REGISTER_WIDTH;
ThisRegister->StatusAddress.BitOffset = 0;
ThisRegister->EnableAddress.BitOffset = 0;
/* Init the EventInfo for each GPE within this register */
for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++)
{
ThisEvent->GpeNumber = (UINT8) (ThisRegister->BaseGpeNumber + j);
ThisEvent->RegisterInfo = ThisRegister;
ThisEvent++;
}
/* Disable all GPEs within this register */
Status = AcpiHwWrite (0x00, &ThisRegister->EnableAddress);
if (ACPI_FAILURE (Status))
{
goto ErrorExit;
}
/* Clear any pending GPE events within this register */
Status = AcpiHwWrite (0xFF, &ThisRegister->StatusAddress);
if (ACPI_FAILURE (Status))
{
goto ErrorExit;
}
ThisRegister++;
}
return_ACPI_STATUS (AE_OK);
ErrorExit:
if (GpeRegisterInfo)
{
ACPI_FREE (GpeRegisterInfo);
}
if (GpeEventInfo)
{
ACPI_FREE (GpeEventInfo);
}
return_ACPI_STATUS (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiEvCreateGpeBlock
*
* PARAMETERS: GpeDevice - Handle to the parent GPE block
* GpeBlockAddress - Address and SpaceID
* RegisterCount - Number of GPE register pairs in the block
* GpeBlockBaseNumber - Starting GPE number for the block
* InterruptNumber - H/W interrupt for the block
* ReturnGpeBlock - Where the new block descriptor is returned
*
* RETURN: Status
*
* DESCRIPTION: Create and Install a block of GPE registers. All GPEs within
* the block are disabled at exit.
* Note: Assumes namespace is locked.
*
******************************************************************************/
ACPI_STATUS
AcpiEvCreateGpeBlock (
ACPI_NAMESPACE_NODE *GpeDevice,
ACPI_GENERIC_ADDRESS *GpeBlockAddress,
UINT32 RegisterCount,
UINT8 GpeBlockBaseNumber,
UINT32 InterruptNumber,
ACPI_GPE_BLOCK_INFO **ReturnGpeBlock)
{
ACPI_STATUS Status;
ACPI_GPE_BLOCK_INFO *GpeBlock;
ACPI_GPE_WALK_INFO WalkInfo;
ACPI_FUNCTION_TRACE (EvCreateGpeBlock);
if (!RegisterCount)
{
return_ACPI_STATUS (AE_OK);
}
/* Allocate a new GPE block */
GpeBlock = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_GPE_BLOCK_INFO));
if (!GpeBlock)
{
return_ACPI_STATUS (AE_NO_MEMORY);
}
/* Initialize the new GPE block */
GpeBlock->Node = GpeDevice;
GpeBlock->GpeCount = (UINT16) (RegisterCount * ACPI_GPE_REGISTER_WIDTH);
GpeBlock->Initialized = FALSE;
GpeBlock->RegisterCount = RegisterCount;
GpeBlock->BlockBaseNumber = GpeBlockBaseNumber;
ACPI_MEMCPY (&GpeBlock->BlockAddress, GpeBlockAddress,
sizeof (ACPI_GENERIC_ADDRESS));
/*
* Create the RegisterInfo and EventInfo sub-structures
* Note: disables and clears all GPEs in the block
*/
Status = AcpiEvCreateGpeInfoBlocks (GpeBlock);
if (ACPI_FAILURE (Status))
{
ACPI_FREE (GpeBlock);
return_ACPI_STATUS (Status);
}
/* Install the new block in the global lists */
Status = AcpiEvInstallGpeBlock (GpeBlock, InterruptNumber);
if (ACPI_FAILURE (Status))
{
ACPI_FREE (GpeBlock);
return_ACPI_STATUS (Status);
}
AcpiGbl_AllGpesInitialized = FALSE;
/* Find all GPE methods (_Lxx or_Exx) for this block */
WalkInfo.GpeBlock = GpeBlock;
WalkInfo.GpeDevice = GpeDevice;
WalkInfo.ExecuteByOwnerId = FALSE;
Status = AcpiNsWalkNamespace (ACPI_TYPE_METHOD, GpeDevice,
ACPI_UINT32_MAX, ACPI_NS_WALK_NO_UNLOCK,
AcpiEvMatchGpeMethod, NULL, &WalkInfo, NULL);
/* Return the new block */
if (ReturnGpeBlock)
{
(*ReturnGpeBlock) = GpeBlock;
}
ACPI_DEBUG_PRINT ((ACPI_DB_INIT,
"GPE %02X to %02X [%4.4s] %u regs on int 0x%X\n",
(UINT32) GpeBlock->BlockBaseNumber,
(UINT32) (GpeBlock->BlockBaseNumber + (GpeBlock->GpeCount - 1)),
GpeDevice->Name.Ascii, GpeBlock->RegisterCount,
InterruptNumber));
/* Update global count of currently available GPEs */
AcpiCurrentGpeCount += GpeBlock->GpeCount;
return_ACPI_STATUS (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: AcpiEvInitializeGpeBlock
*
* PARAMETERS: ACPI_GPE_CALLBACK
*
* RETURN: Status
*
* DESCRIPTION: Initialize and enable a GPE block. Enable GPEs that have
* associated methods.
* Note: Assumes namespace is locked.
*
******************************************************************************/
ACPI_STATUS
AcpiEvInitializeGpeBlock (
ACPI_GPE_XRUPT_INFO *GpeXruptInfo,
ACPI_GPE_BLOCK_INFO *GpeBlock,
void *Ignored)
{
ACPI_STATUS Status;
ACPI_GPE_EVENT_INFO *GpeEventInfo;
UINT32 GpeEnabledCount;
UINT32 GpeIndex;
UINT32 i;
UINT32 j;
ACPI_FUNCTION_TRACE (EvInitializeGpeBlock);
/*
* Ignore a null GPE block (e.g., if no GPE block 1 exists), and
* any GPE blocks that have been initialized already.
*/
if (!GpeBlock || GpeBlock->Initialized)
{
return_ACPI_STATUS (AE_OK);
}
/*
* Enable all GPEs that have a corresponding method and have the
* ACPI_GPE_CAN_WAKE flag unset. Any other GPEs within this block
* must be enabled via the acpi_enable_gpe() interface.
*/
GpeEnabledCount = 0;
for (i = 0; i < GpeBlock->RegisterCount; i++)
{
for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++)
{
/* Get the info block for this particular GPE */
GpeIndex = (i * ACPI_GPE_REGISTER_WIDTH) + j;
GpeEventInfo = &GpeBlock->EventInfo[GpeIndex];
/*
* Ignore GPEs that have no corresponding _Lxx/_Exx method
* and GPEs that are used to wake the system
*/
if (((GpeEventInfo->Flags & ACPI_GPE_DISPATCH_MASK) == ACPI_GPE_DISPATCH_NONE) ||
((GpeEventInfo->Flags & ACPI_GPE_DISPATCH_MASK) == ACPI_GPE_DISPATCH_HANDLER) ||
(GpeEventInfo->Flags & ACPI_GPE_CAN_WAKE))
{
continue;
}
Status = AcpiEvAddGpeReference (GpeEventInfo);
if (ACPI_FAILURE (Status))
{
ACPI_EXCEPTION ((AE_INFO, Status,
"Could not enable GPE 0x%02X",
GpeIndex + GpeBlock->BlockBaseNumber));
continue;
}
GpeEnabledCount++;
}
}
if (GpeEnabledCount)
{
ACPI_DEBUG_PRINT ((ACPI_DB_INIT,
"Enabled %u GPEs in this block\n", GpeEnabledCount));
}
GpeBlock->Initialized = TRUE;
return_ACPI_STATUS (AE_OK);
}