/******************************************************************************
*
* Module Name: evrgnini- ACPI AddressSpace (OpRegion) init
*
*****************************************************************************/
/*
* Copyright (C) 2000 - 2018, 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 "acpi.h"
#include "accommon.h"
#include "acevents.h"
#include "acnamesp.h"
#include "acinterp.h"
#define _COMPONENT ACPI_EVENTS
ACPI_MODULE_NAME ("evrgnini")
/* Local prototypes */
static BOOLEAN
AcpiEvIsPciRootBridge (
ACPI_NAMESPACE_NODE *Node);
/*******************************************************************************
*
* FUNCTION: AcpiEvSystemMemoryRegionSetup
*
* PARAMETERS: Handle - Region we are interested in
* Function - Start or stop
* HandlerContext - Address space handler context
* RegionContext - Region specific context
*
* RETURN: Status
*
* DESCRIPTION: Setup a SystemMemory operation region
*
******************************************************************************/
ACPI_STATUS
AcpiEvSystemMemoryRegionSetup (
ACPI_HANDLE Handle,
UINT32 Function,
void *HandlerContext,
void **RegionContext)
{
ACPI_OPERAND_OBJECT *RegionDesc = (ACPI_OPERAND_OBJECT *) Handle;
ACPI_MEM_SPACE_CONTEXT *LocalRegionContext;
ACPI_FUNCTION_TRACE (EvSystemMemoryRegionSetup);
if (Function == ACPI_REGION_DEACTIVATE)
{
if (*RegionContext)
{
LocalRegionContext = (ACPI_MEM_SPACE_CONTEXT *) *RegionContext;
/* Delete a cached mapping if present */
if (LocalRegionContext->MappedLength)
{
AcpiOsUnmapMemory (LocalRegionContext->MappedLogicalAddress,
LocalRegionContext->MappedLength);
}
ACPI_FREE (LocalRegionContext);
*RegionContext = NULL;
}
return_ACPI_STATUS (AE_OK);
}
/* Create a new context */
LocalRegionContext = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_MEM_SPACE_CONTEXT));
if (!(LocalRegionContext))
{
return_ACPI_STATUS (AE_NO_MEMORY);
}
/* Save the region length and address for use in the handler */
LocalRegionContext->Length = RegionDesc->Region.Length;
LocalRegionContext->Address = RegionDesc->Region.Address;
*RegionContext = LocalRegionContext;
return_ACPI_STATUS (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: AcpiEvIoSpaceRegionSetup
*
* PARAMETERS: Handle - Region we are interested in
* Function - Start or stop
* HandlerContext - Address space handler context
* RegionContext - Region specific context
*
* RETURN: Status
*
* DESCRIPTION: Setup a IO operation region
*
******************************************************************************/
ACPI_STATUS
AcpiEvIoSpaceRegionSetup (
ACPI_HANDLE Handle,
UINT32 Function,
void *HandlerContext,
void **RegionContext)
{
ACPI_FUNCTION_TRACE (EvIoSpaceRegionSetup);
if (Function == ACPI_REGION_DEACTIVATE)
{
*RegionContext = NULL;
}
else
{
*RegionContext = HandlerContext;
}
return_ACPI_STATUS (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: AcpiEvPciConfigRegionSetup
*
* PARAMETERS: Handle - Region we are interested in
* Function - Start or stop
* HandlerContext - Address space handler context
* RegionContext - Region specific context
*
* RETURN: Status
*
* DESCRIPTION: Setup a PCI_Config operation region
*
* MUTEX: Assumes namespace is not locked
*
******************************************************************************/
ACPI_STATUS
AcpiEvPciConfigRegionSetup (
ACPI_HANDLE Handle,
UINT32 Function,
void *HandlerContext,
void **RegionContext)
{
ACPI_STATUS Status = AE_OK;
UINT64 PciValue;
ACPI_PCI_ID *PciId = *RegionContext;
ACPI_OPERAND_OBJECT *HandlerObj;
ACPI_NAMESPACE_NODE *ParentNode;
ACPI_NAMESPACE_NODE *PciRootNode;
ACPI_NAMESPACE_NODE *PciDeviceNode;
ACPI_OPERAND_OBJECT *RegionObj = (ACPI_OPERAND_OBJECT *) Handle;
ACPI_FUNCTION_TRACE (EvPciConfigRegionSetup);
HandlerObj = RegionObj->Region.Handler;
if (!HandlerObj)
{
/*
* No installed handler. This shouldn't happen because the dispatch
* routine checks before we get here, but we check again just in case.
*/
ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
"Attempting to init a region %p, with no handler\n", RegionObj));
return_ACPI_STATUS (AE_NOT_EXIST);
}
*RegionContext = NULL;
if (Function == ACPI_REGION_DEACTIVATE)
{
if (PciId)
{
ACPI_FREE (PciId);
}
return_ACPI_STATUS (Status);
}
ParentNode = RegionObj->Region.Node->Parent;
/*
* Get the _SEG and _BBN values from the device upon which the handler
* is installed.
*
* We need to get the _SEG and _BBN objects relative to the PCI BUS device.
* This is the device the handler has been registered to handle.
*/
/*
* If the AddressSpace.Node is still pointing to the root, we need
* to scan upward for a PCI Root bridge and re-associate the OpRegion
* handlers with that device.
*/
if (HandlerObj->AddressSpace.Node == AcpiGbl_RootNode)
{
/* Start search from the parent object */
PciRootNode = ParentNode;
while (PciRootNode != AcpiGbl_RootNode)
{
/* Get the _HID/_CID in order to detect a RootBridge */
if (AcpiEvIsPciRootBridge (PciRootNode))
{
/* Install a handler for this PCI root bridge */
Status = AcpiInstallAddressSpaceHandler (
(ACPI_HANDLE) PciRootNode,
ACPI_ADR_SPACE_PCI_CONFIG,
ACPI_DEFAULT_HANDLER, NULL, NULL);
if (ACPI_FAILURE (Status))
{
if (Status == AE_SAME_HANDLER)
{
/*
* It is OK if the handler is already installed on the
* root bridge. Still need to return a context object
* for the new PCI_Config operation region, however.
*/
Status = AE_OK;
}
else
{
ACPI_EXCEPTION ((AE_INFO, Status,
"Could not install PciConfig handler "
"for Root Bridge %4.4s",
AcpiUtGetNodeName (PciRootNode)));
}
}
break;
}
PciRootNode = PciRootNode->Parent;
}
/* PCI root bridge not found, use namespace root node */
}
else
{
PciRootNode = HandlerObj->AddressSpace.Node;
}
/*
* If this region is now initialized, we are done.
* (InstallAddressSpaceHandler could have initialized it)
*/
if (RegionObj->Region.Flags & AOPOBJ_SETUP_COMPLETE)
{
return_ACPI_STATUS (AE_OK);
}
/* Region is still not initialized. Create a new context */
PciId = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_PCI_ID));
if (!PciId)
{
return_ACPI_STATUS (AE_NO_MEMORY);
}
/*
* For PCI_Config space access, we need the segment, bus, device and
* function numbers. Acquire them here.
*
* Find the parent device object. (This allows the operation region to be
* within a subscope under the device, such as a control method.)
*/
PciDeviceNode = RegionObj->Region.Node;
while (PciDeviceNode && (PciDeviceNode->Type != ACPI_TYPE_DEVICE))
{
PciDeviceNode = PciDeviceNode->Parent;
}
if (!PciDeviceNode)
{
ACPI_FREE (PciId);
return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
}
/*
* Get the PCI device and function numbers from the _ADR object
* contained in the parent's scope.
*/
Status = AcpiUtEvaluateNumericObject (METHOD_NAME__ADR,
PciDeviceNode, &PciValue);
/*
* The default is zero, and since the allocation above zeroed the data,
* just do nothing on failure.
*/
if (ACPI_SUCCESS (Status))
{
PciId->Device = ACPI_HIWORD (ACPI_LODWORD (PciValue));
PciId->Function = ACPI_LOWORD (ACPI_LODWORD (PciValue));
}
/* The PCI segment number comes from the _SEG method */
Status = AcpiUtEvaluateNumericObject (METHOD_NAME__SEG,
PciRootNode, &PciValue);
if (ACPI_SUCCESS (Status))
{
PciId->Segment = ACPI_LOWORD (PciValue);
}
/* The PCI bus number comes from the _BBN method */
Status = AcpiUtEvaluateNumericObject (METHOD_NAME__BBN,
PciRootNode, &PciValue);
if (ACPI_SUCCESS (Status))
{
PciId->Bus = ACPI_LOWORD (PciValue);
}
/* Complete/update the PCI ID for this device */
Status = AcpiHwDerivePciId (PciId, PciRootNode, RegionObj->Region.Node);
if (ACPI_FAILURE (Status))
{
ACPI_FREE (PciId);
return_ACPI_STATUS (Status);
}
*RegionContext = PciId;
return_ACPI_STATUS (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: AcpiEvIsPciRootBridge
*
* PARAMETERS: Node - Device node being examined
*
* RETURN: TRUE if device is a PCI/PCI-Express Root Bridge
*
* DESCRIPTION: Determine if the input device represents a PCI Root Bridge by
* examining the _HID and _CID for the device.
*
******************************************************************************/
static BOOLEAN
AcpiEvIsPciRootBridge (
ACPI_NAMESPACE_NODE *Node)
{
ACPI_STATUS Status;
ACPI_PNP_DEVICE_ID *Hid;
ACPI_PNP_DEVICE_ID_LIST *Cid;
UINT32 i;
BOOLEAN Match;
/* Get the _HID and check for a PCI Root Bridge */
Status = AcpiUtExecute_HID (Node, &Hid);
if (ACPI_FAILURE (Status))
{
return (FALSE);
}
Match = AcpiUtIsPciRootBridge (Hid->String);
ACPI_FREE (Hid);
if (Match)
{
return (TRUE);
}
/* The _HID did not match. Get the _CID and check for a PCI Root Bridge */
Status = AcpiUtExecute_CID (Node, &Cid);
if (ACPI_FAILURE (Status))
{
return (FALSE);
}
/* Check all _CIDs in the returned list */
for (i = 0; i < Cid->Count; i++)
{
if (AcpiUtIsPciRootBridge (Cid->Ids[i].String))
{
ACPI_FREE (Cid);
return (TRUE);
}
}
ACPI_FREE (Cid);
return (FALSE);
}
/*******************************************************************************
*
* FUNCTION: AcpiEvPciBarRegionSetup
*
* PARAMETERS: Handle - Region we are interested in
* Function - Start or stop
* HandlerContext - Address space handler context
* RegionContext - Region specific context
*
* RETURN: Status
*
* DESCRIPTION: Setup a PciBAR operation region
*
* MUTEX: Assumes namespace is not locked
*
******************************************************************************/
ACPI_STATUS
AcpiEvPciBarRegionSetup (
ACPI_HANDLE Handle,
UINT32 Function,
void *HandlerContext,
void **RegionContext)
{
ACPI_FUNCTION_TRACE (EvPciBarRegionSetup);
return_ACPI_STATUS (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: AcpiEvCmosRegionSetup
*
* PARAMETERS: Handle - Region we are interested in
* Function - Start or stop
* HandlerContext - Address space handler context
* RegionContext - Region specific context
*
* RETURN: Status
*
* DESCRIPTION: Setup a CMOS operation region
*
* MUTEX: Assumes namespace is not locked
*
******************************************************************************/
ACPI_STATUS
AcpiEvCmosRegionSetup (
ACPI_HANDLE Handle,
UINT32 Function,
void *HandlerContext,
void **RegionContext)
{
ACPI_FUNCTION_TRACE (EvCmosRegionSetup);
return_ACPI_STATUS (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: AcpiEvDefaultRegionSetup
*
* PARAMETERS: Handle - Region we are interested in
* Function - Start or stop
* HandlerContext - Address space handler context
* RegionContext - Region specific context
*
* RETURN: Status
*
* DESCRIPTION: Default region initialization
*
******************************************************************************/
ACPI_STATUS
AcpiEvDefaultRegionSetup (
ACPI_HANDLE Handle,
UINT32 Function,
void *HandlerContext,
void **RegionContext)
{
ACPI_FUNCTION_TRACE (EvDefaultRegionSetup);
if (Function == ACPI_REGION_DEACTIVATE)
{
*RegionContext = NULL;
}
else
{
*RegionContext = HandlerContext;
}
return_ACPI_STATUS (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: AcpiEvInitializeRegion
*
* PARAMETERS: RegionObj - Region we are initializing
*
* RETURN: Status
*
* DESCRIPTION: Initializes the region, finds any _REG methods and saves them
* for execution at a later time
*
* Get the appropriate address space handler for a newly
* created region.
*
* This also performs address space specific initialization. For
* example, PCI regions must have an _ADR object that contains
* a PCI address in the scope of the definition. This address is
* required to perform an access to PCI config space.
*
* MUTEX: Interpreter should be unlocked, because we may run the _REG
* method for this region.
*
* NOTE: Possible incompliance:
* There is a behavior conflict in automatic _REG execution:
* 1. When the interpreter is evaluating a method, we can only
* automatically run _REG for the following case:
* Method(_REG, 2) {}
* OperationRegion (OPR1, 0x80, 0x1000010, 0x4)
* 2. When the interpreter is loading a table, we can also
* automatically run _REG for the following case:
* OperationRegion (OPR1, 0x80, 0x1000010, 0x4)
* Method(_REG, 2) {}
* Though this may not be compliant to the de-facto standard, the
* logic is kept in order not to trigger regressions. And keeping
* this logic should be taken care by the caller of this function.
*
******************************************************************************/
ACPI_STATUS
AcpiEvInitializeRegion (
ACPI_OPERAND_OBJECT *RegionObj)
{
ACPI_OPERAND_OBJECT *HandlerObj;
ACPI_OPERAND_OBJECT *ObjDesc;
ACPI_ADR_SPACE_TYPE SpaceId;
ACPI_NAMESPACE_NODE *Node;
ACPI_FUNCTION_TRACE (EvInitializeRegion);
if (!RegionObj)
{
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
if (RegionObj->Common.Flags & AOPOBJ_OBJECT_INITIALIZED)
{
return_ACPI_STATUS (AE_OK);
}
RegionObj->Common.Flags |= AOPOBJ_OBJECT_INITIALIZED;
Node = RegionObj->Region.Node->Parent;
SpaceId = RegionObj->Region.SpaceId;
/*
* The following loop depends upon the root Node having no parent
* ie: AcpiGbl_RootNode->Parent being set to NULL
*/
while (Node)
{
/* Check to see if a handler exists */
HandlerObj = NULL;
ObjDesc = AcpiNsGetAttachedObject (Node);
if (ObjDesc)
{
/* Can only be a handler if the object exists */
switch (Node->Type)
{
case ACPI_TYPE_DEVICE:
case ACPI_TYPE_PROCESSOR:
case ACPI_TYPE_THERMAL:
HandlerObj = ObjDesc->CommonNotify.Handler;
break;
case ACPI_TYPE_METHOD:
/*
* If we are executing module level code, the original
* Node's object was replaced by this Method object and we
* saved the handler in the method object.
*
* Note: Only used for the legacy MLC support. Will
* be removed in the future.
*
* See AcpiNsExecModuleCode
*/
if (!AcpiGbl_ExecuteTablesAsMethods &&
ObjDesc->Method.InfoFlags & ACPI_METHOD_MODULE_LEVEL)
{
HandlerObj = ObjDesc->Method.Dispatch.Handler;
}
break;
default:
/* Ignore other objects */
break;
}
HandlerObj = AcpiEvFindRegionHandler (SpaceId, HandlerObj);
if (HandlerObj)
{
/* Found correct handler */
ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
"Found handler %p for region %p in obj %p\n",
HandlerObj, RegionObj, ObjDesc));
(void) AcpiEvAttachRegion (HandlerObj, RegionObj, FALSE);
/*
* Tell all users that this region is usable by
* running the _REG method
*/
AcpiExExitInterpreter ();
(void) AcpiEvExecuteRegMethod (RegionObj, ACPI_REG_CONNECT);
AcpiExEnterInterpreter ();
return_ACPI_STATUS (AE_OK);
}
}
/* This node does not have the handler we need; Pop up one level */
Node = Node->Parent;
}
/*
* If we get here, there is no handler for this region. This is not
* fatal because many regions get created before a handler is installed
* for said region.
*/
ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
"No handler for RegionType %s(%X) (RegionObj %p)\n",
AcpiUtGetRegionName (SpaceId), SpaceId, RegionObj));
return_ACPI_STATUS (AE_OK);
}