static ACPI_STATUS
AcpiHwGetPciDeviceInfo (
ACPI_PCI_ID *PciId,
ACPI_HANDLE PciDevice,
UINT16 *BusNumber,
BOOLEAN *IsBridge)
{
ACPI_STATUS Status;
ACPI_OBJECT_TYPE ObjectType;
UINT64 ReturnValue;
UINT64 PciValue;
/* We only care about objects of type Device */
Status = AcpiGetType (PciDevice, &ObjectType);
if (ACPI_FAILURE (Status))
{
return (Status);
}
if (ObjectType != ACPI_TYPE_DEVICE)
{
return (AE_OK);
}
/* We need an _ADR. Ignore device if not present */
Status = AcpiUtEvaluateNumericObject (METHOD_NAME__ADR,
PciDevice, &ReturnValue);
if (ACPI_FAILURE (Status))
{
return (AE_OK);
}
/*
* From _ADR, get the PCI Device and Function and
* update the PCI ID.
*/
PciId->Device = ACPI_HIWORD (ACPI_LODWORD (ReturnValue));
PciId->Function = ACPI_LOWORD (ACPI_LODWORD (ReturnValue));
/*
* If the previous device was a bridge, use the previous
* device bus number
*/
if (*IsBridge)
{
PciId->Bus = *BusNumber;
}
/*
* Get the bus numbers from PCI Config space:
*
* First, get the PCI HeaderType
*/
*IsBridge = FALSE;
Status = AcpiOsReadPciConfiguration (PciId,
PCI_CFG_HEADER_TYPE_REG, &PciValue, 8);
if (ACPI_FAILURE (Status))
{
return (Status);
}
/* We only care about bridges (1=PciBridge, 2=CardBusBridge) */
PciValue &= PCI_HEADER_TYPE_MASK;
if ((PciValue != PCI_TYPE_BRIDGE) &&
(PciValue != PCI_TYPE_CARDBUS_BRIDGE))
{
return (AE_OK);
}
/* Bridge: Get the Primary BusNumber */
Status = AcpiOsReadPciConfiguration (PciId,
PCI_CFG_PRIMARY_BUS_NUMBER_REG, &PciValue, 8);
if (ACPI_FAILURE (Status))
{
return (Status);
}
*IsBridge = TRUE;
PciId->Bus = (UINT16) PciValue;
/* Bridge: Get the Secondary BusNumber */
Status = AcpiOsReadPciConfiguration (PciId,
PCI_CFG_SECONDARY_BUS_NUMBER_REG, &PciValue, 8);
if (ACPI_FAILURE (Status))
{
return (Status);
}
*BusNumber = (UINT16) PciValue;
return (AE_OK);
}
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);
}
ACPI_STATUS
AcpiGetObjectInfo (
ACPI_HANDLE Handle,
ACPI_DEVICE_INFO *Info)
{
ACPI_DEVICE_ID Hid;
ACPI_DEVICE_ID Uid;
ACPI_STATUS Status;
UINT32 DeviceStatus = 0;
ACPI_INTEGER Address = 0;
ACPI_NAMESPACE_NODE *Node;
/* Ensure that ACPI has been initialized */
ACPI_IS_INITIALIZATION_COMPLETE (Status);
if (ACPI_FAILURE (Status))
{
return (Status);
}
/* Parameter validation */
if (!Handle || !Info)
{
return (AE_BAD_PARAMETER);
}
AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
Node = AcpiNsConvertHandleToEntry (Handle);
if (!Node)
{
AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
return (AE_BAD_PARAMETER);
}
Info->Type = Node->Type;
Info->Name = Node->Name;
AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
/*
* If not a device, we are all done.
*/
if (Info->Type != ACPI_TYPE_DEVICE)
{
return (AE_OK);
}
/*
* Get extra info for ACPI devices only. Run the
* _HID, _UID, _STA, and _ADR methods. Note: none
* of these methods are required, so they may or may
* not be present. The Info->Valid bits are used
* to indicate which methods ran successfully.
*/
Info->Valid = 0;
/* Execute the _HID method and save the result */
Status = AcpiUtExecute_HID (Node, &Hid);
if (ACPI_SUCCESS (Status))
{
STRNCPY (Info->HardwareId, Hid.Buffer, sizeof(Info->HardwareId));
Info->Valid |= ACPI_VALID_HID;
}
/* Execute the _UID method and save the result */
Status = AcpiUtExecute_UID (Node, &Uid);
if (ACPI_SUCCESS (Status))
{
STRCPY (Info->UniqueId, Uid.Buffer);
Info->Valid |= ACPI_VALID_UID;
}
/*
* Execute the _STA method and save the result
* _STA is not always present
*/
Status = AcpiUtExecute_STA (Node, &DeviceStatus);
if (ACPI_SUCCESS (Status))
{
Info->CurrentStatus = DeviceStatus;
Info->Valid |= ACPI_VALID_STA;
}
/*
* Execute the _ADR method and save result if successful
* _ADR is not always present
*/
Status = AcpiUtEvaluateNumericObject (METHOD_NAME__ADR,
Node, &Address);
if (ACPI_SUCCESS (Status))
{
Info->Address = Address;
Info->Valid |= ACPI_VALID_ADR;
}
return (AE_OK);
}
ACPI_STATUS
AcpiGetObjectInfo (
ACPI_HANDLE Handle,
ACPI_BUFFER *Buffer)
{
ACPI_STATUS Status;
ACPI_NAMESPACE_NODE *Node;
ACPI_DEVICE_INFO *Info;
ACPI_DEVICE_INFO *ReturnInfo;
ACPI_COMPATIBLE_ID_LIST *CidList = NULL;
ACPI_SIZE Size;
/* Parameter validation */
if (!Handle || !Buffer)
{
return (AE_BAD_PARAMETER);
}
Status = AcpiUtValidateBuffer (Buffer);
if (ACPI_FAILURE (Status))
{
return (Status);
}
Info = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_DEVICE_INFO));
if (!Info)
{
return (AE_NO_MEMORY);
}
Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
if (ACPI_FAILURE (Status))
{
goto Cleanup;
}
Node = AcpiNsMapHandleToNode (Handle);
if (!Node)
{
(void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
goto Cleanup;
}
/* Init return structure */
Size = sizeof (ACPI_DEVICE_INFO);
Info->Type = Node->Type;
Info->Name = Node->Name.Integer;
Info->Valid = 0;
Status = AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
if (ACPI_FAILURE (Status))
{
goto Cleanup;
}
/* If not a device, we are all done */
if (Info->Type == ACPI_TYPE_DEVICE)
{
/*
* Get extra info for ACPI Devices objects only:
* Run the Device _HID, _UID, _CID, _STA, _ADR and _SxD methods.
*
* Note: none of these methods are required, so they may or may
* not be present for this device. The Info->Valid bitfield is used
* to indicate which methods were found and ran successfully.
*/
/* Execute the Device._HID method */
Status = AcpiUtExecute_HID (Node, &Info->HardwareId);
if (ACPI_SUCCESS (Status))
{
Info->Valid |= ACPI_VALID_HID;
}
/* Execute the Device._UID method */
Status = AcpiUtExecute_UID (Node, &Info->UniqueId);
if (ACPI_SUCCESS (Status))
{
Info->Valid |= ACPI_VALID_UID;
}
/* Execute the Device._CID method */
Status = AcpiUtExecute_CID (Node, &CidList);
if (ACPI_SUCCESS (Status))
{
Size += CidList->Size;
Info->Valid |= ACPI_VALID_CID;
}
/* Execute the Device._STA method */
Status = AcpiUtExecute_STA (Node, &Info->CurrentStatus);
if (ACPI_SUCCESS (Status))
{
Info->Valid |= ACPI_VALID_STA;
}
/* Execute the Device._ADR method */
Status = AcpiUtEvaluateNumericObject (METHOD_NAME__ADR, Node,
&Info->Address);
if (ACPI_SUCCESS (Status))
{
Info->Valid |= ACPI_VALID_ADR;
}
/* Execute the Device._SxD methods */
Status = AcpiUtExecute_Sxds (Node, Info->HighestDstates);
if (ACPI_SUCCESS (Status))
{
Info->Valid |= ACPI_VALID_SXDS;
}
}
/* Validate/Allocate/Clear caller buffer */
Status = AcpiUtInitializeBuffer (Buffer, Size);
if (ACPI_FAILURE (Status))
{
goto Cleanup;
}
/* Populate the return buffer */
ReturnInfo = Buffer->Pointer;
ACPI_MEMCPY (ReturnInfo, Info, sizeof (ACPI_DEVICE_INFO));
if (CidList)
{
ACPI_MEMCPY (&ReturnInfo->CompatibilityId, CidList, CidList->Size);
}
Cleanup:
ACPI_FREE (Info);
if (CidList)
{
ACPI_FREE (CidList);
}
return (Status);
}
ACPI_STATUS
AcpiEvPciConfigRegionSetup (
ACPI_HANDLE Handle,
UINT32 Function,
void *HandlerContext,
void **RegionContext)
{
ACPI_STATUS Status = AE_OK;
ACPI_INTEGER Temp;
ACPI_PCI_ID *PciId = *RegionContext;
ACPI_OPERAND_OBJECT *HandlerObj;
ACPI_NAMESPACE_NODE *Node;
ACPI_OPERAND_OBJECT *RegionObj = (ACPI_OPERAND_OBJECT *) Handle;
ACPI_DEVICE_ID ObjectHID;
ACPI_FUNCTION_TRACE ("EvPciConfigRegionSetup");
HandlerObj = RegionObj->Region.AddrHandler;
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);
}
if (Function == ACPI_REGION_DEACTIVATE)
{
if (PciId)
{
ACPI_MEM_FREE (PciId);
*RegionContext = NULL;
}
return_ACPI_STATUS (Status);
}
/* Create a new context */
PciId = ACPI_MEM_CALLOCATE (sizeof (ACPI_PCI_ID));
if (!PciId)
{
return_ACPI_STATUS (AE_NO_MEMORY);
}
/*
* For PCI Config space access, we have to pass the segment, bus,
* device and function numbers. This routine must acquire those.
*/
/*
* First get device and function numbers from the _ADR object
* in the parent's scope.
*/
Node = AcpiNsGetParentNode (RegionObj->Region.Node);
/* Evaluate the _ADR object */
Status = AcpiUtEvaluateNumericObject (METHOD_NAME__ADR, Node, &Temp);
/*
* 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 (Temp));
PciId->Function = ACPI_LOWORD (ACPI_LODWORD (Temp));
}
/*
* 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 AddrHandler.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->AddrHandler.Node == AcpiGbl_RootNode)
{
/*
* Node is currently the parent object
*/
while (Node != AcpiGbl_RootNode)
{
Status = AcpiUtExecute_HID (Node, &ObjectHID);
if (ACPI_SUCCESS (Status))
{
/* Got a valid _HID, check if this is a PCI root */
if (!(ACPI_STRNCMP (ObjectHID.Buffer, PCI_ROOT_HID_STRING,
sizeof (PCI_ROOT_HID_STRING))))
{
/* Install a handler for this PCI root bridge */
Status = AcpiInstallAddressSpaceHandler ((ACPI_HANDLE) Node,
ACPI_ADR_SPACE_PCI_CONFIG,
ACPI_DEFAULT_HANDLER, NULL, NULL);
if (ACPI_FAILURE (Status))
{
ACPI_REPORT_ERROR (("Could not install PciConfig handler for %4.4s, %s\n",
Node->Name.Ascii, AcpiFormatException (Status)));
}
break;
}
}
Node = AcpiNsGetParentNode (Node);
}
}
else
{
Node = HandlerObj->AddrHandler.Node;
}
/*
* The PCI segment number comes from the _SEG method
*/
Status = AcpiUtEvaluateNumericObject (METHOD_NAME__SEG, Node, &Temp);
if (ACPI_SUCCESS (Status))
{
PciId->Segment = ACPI_LOWORD (Temp);
}
/*
* The PCI bus number comes from the _BBN method
*/
Status = AcpiUtEvaluateNumericObject (METHOD_NAME__BBN, Node, &Temp);
if (ACPI_SUCCESS (Status))
{
PciId->Bus = ACPI_LOWORD (Temp);
}
/*
* Complete this device's PciId
*/
AcpiOsDerivePciId (Node, RegionObj->Region.Node, &PciId);
*RegionContext = PciId;
return_ACPI_STATUS (AE_OK);
}