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);
}
static BOOLEAN
AcpiEvIsPciRootBridge (
ACPI_NAMESPACE_NODE *Node)
{
ACPI_STATUS Status;
ACPI_DEVICE_ID Hid;
ACPI_COMPATIBLE_ID_LIST *Cid;
ACPI_NATIVE_UINT i;
/*
* Get the _HID and check for a PCI Root Bridge
*/
Status = AcpiUtExecute_HID (Node, &Hid);
if (ACPI_FAILURE (Status))
{
return (FALSE);
}
if (AcpiEvMatchPciRootBridge (Hid.Value))
{
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 (AcpiEvMatchPciRootBridge (Cid->Id[i].Value))
{
ACPI_FREE (Cid);
return (TRUE);
}
}
ACPI_FREE (Cid);
return (FALSE);
}
static ACPI_STATUS
AcpiNsGetDeviceCallback (
ACPI_HANDLE ObjHandle,
UINT32 NestingLevel,
void *Context,
void **ReturnValue)
{
ACPI_GET_DEVICES_INFO *Info = Context;
ACPI_STATUS Status;
ACPI_NAMESPACE_NODE *Node;
UINT32 Flags;
ACPI_PNP_DEVICE_ID *Hid;
ACPI_PNP_DEVICE_ID_LIST *Cid;
UINT32 i;
BOOLEAN Found;
int NoMatch;
Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
if (ACPI_FAILURE (Status))
{
return (Status);
}
Node = AcpiNsValidateHandle (ObjHandle);
Status = AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
if (ACPI_FAILURE (Status))
{
return (Status);
}
if (!Node)
{
return (AE_BAD_PARAMETER);
}
/*
* First, filter based on the device HID and CID.
*
* 01/2010: For this case where a specific HID is requested, we don't
* want to run _STA until we have an actual HID match. Thus, we will
* not unnecessarily execute _STA on devices for which the caller
* doesn't care about. Previously, _STA was executed unconditionally
* on all devices found here.
*
* A side-effect of this change is that now we will continue to search
* for a matching HID even under device trees where the parent device
* would have returned a _STA that indicates it is not present or
* not functioning (thus aborting the search on that branch).
*/
if (Info->Hid != NULL)
{
Status = AcpiUtExecute_HID (Node, &Hid);
if (Status == AE_NOT_FOUND)
{
return (AE_OK);
}
else if (ACPI_FAILURE (Status))
{
return (AE_CTRL_DEPTH);
}
NoMatch = strcmp (Hid->String, Info->Hid);
ACPI_FREE (Hid);
if (NoMatch)
{
/*
* HID does not match, attempt match within the
* list of Compatible IDs (CIDs)
*/
Status = AcpiUtExecute_CID (Node, &Cid);
if (Status == AE_NOT_FOUND)
{
return (AE_OK);
}
else if (ACPI_FAILURE (Status))
{
return (AE_CTRL_DEPTH);
}
/* Walk the CID list */
Found = FALSE;
for (i = 0; i < Cid->Count; i++)
{
if (strcmp (Cid->Ids[i].String, Info->Hid) == 0)
{
/* Found a matching CID */
Found = TRUE;
break;
}
}
ACPI_FREE (Cid);
if (!Found)
{
return (AE_OK);
}
}
}
/* Run _STA to determine if device is present */
Status = AcpiUtExecute_STA (Node, &Flags);
if (ACPI_FAILURE (Status))
{
return (AE_CTRL_DEPTH);
}
if (!(Flags & ACPI_STA_DEVICE_PRESENT) &&
!(Flags & ACPI_STA_DEVICE_FUNCTIONING))
{
/*
* Don't examine the children of the device only when the
* device is neither present nor functional. See ACPI spec,
* description of _STA for more information.
*/
return (AE_CTRL_DEPTH);
}
/* We have a valid device, invoke the user function */
Status = Info->UserFunction (ObjHandle, NestingLevel,
Info->Context, ReturnValue);
return (Status);
}
static ACPI_STATUS
AcpiNsGetDeviceCallback (
ACPI_HANDLE ObjHandle,
UINT32 NestingLevel,
void *Context,
void **ReturnValue)
{
ACPI_GET_DEVICES_INFO *Info = Context;
ACPI_STATUS Status;
ACPI_NAMESPACE_NODE *Node;
UINT32 Flags;
ACPI_DEVICE_ID *Hid;
ACPI_DEVICE_ID_LIST *Cid;
UINT32 i;
BOOLEAN Found;
int NoMatch;
Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
if (ACPI_FAILURE (Status))
{
return (Status);
}
Node = AcpiNsValidateHandle (ObjHandle);
Status = AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
if (ACPI_FAILURE (Status))
{
return (Status);
}
if (!Node)
{
return (AE_BAD_PARAMETER);
}
/* Run _STA to determine if device is present */
Status = AcpiUtExecute_STA (Node, &Flags);
if (ACPI_FAILURE (Status))
{
return (AE_CTRL_DEPTH);
}
if (!(Flags & ACPI_STA_DEVICE_PRESENT) &&
!(Flags & ACPI_STA_DEVICE_FUNCTIONING))
{
/*
* Don't examine the children of the device only when the
* device is neither present nor functional. See ACPI spec,
* description of _STA for more information.
*/
return (AE_CTRL_DEPTH);
}
/* Filter based on device HID & CID */
if (Info->Hid != NULL)
{
Status = AcpiUtExecute_HID (Node, &Hid);
if (Status == AE_NOT_FOUND)
{
return (AE_OK);
}
else if (ACPI_FAILURE (Status))
{
return (AE_CTRL_DEPTH);
}
NoMatch = ACPI_STRCMP (Hid->String, Info->Hid);
ACPI_FREE (Hid);
if (NoMatch)
{
/*
* HID does not match, attempt match within the
* list of Compatible IDs (CIDs)
*/
Status = AcpiUtExecute_CID (Node, &Cid);
if (Status == AE_NOT_FOUND)
{
return (AE_OK);
}
else if (ACPI_FAILURE (Status))
{
return (AE_CTRL_DEPTH);
}
/* Walk the CID list */
Found = FALSE;
for (i = 0; i < Cid->Count; i++)
{
if (ACPI_STRCMP (Cid->Ids[i].String, Info->Hid) == 0)
{
/* Found a matching CID */
Found = TRUE;
break;
}
}
ACPI_FREE (Cid);
if (!Found)
{
return (AE_OK);
}
}
}
/* We have a valid device, invoke the user function */
Status = Info->UserFunction (ObjHandle, NestingLevel, Info->Context,
ReturnValue);
return (Status);
}
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
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);
}
static ACPI_STATUS
AcpiNsGetDeviceCallback (
ACPI_HANDLE ObjHandle,
UINT32 NestingLevel,
void *Context,
void **ReturnValue)
{
ACPI_GET_DEVICES_INFO *Info = Context;
ACPI_STATUS Status;
ACPI_NAMESPACE_NODE *Node;
UINT32 Flags;
ACPI_DEVICE_ID Hid;
ACPI_COMPATIBLE_ID_LIST *Cid;
ACPI_NATIVE_UINT i;
Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
if (ACPI_FAILURE (Status))
{
return (Status);
}
Node = AcpiNsMapHandleToNode (ObjHandle);
Status = AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
if (ACPI_FAILURE (Status))
{
return (Status);
}
if (!Node)
{
return (AE_BAD_PARAMETER);
}
/* Run _STA to determine if device is present */
Status = AcpiUtExecute_STA (Node, &Flags);
if (ACPI_FAILURE (Status))
{
return (AE_CTRL_DEPTH);
}
if (!(Flags & ACPI_STA_DEVICE_PRESENT))
{
/* Don't examine children of the device if not present */
return (AE_CTRL_DEPTH);
}
/* Filter based on device HID & CID */
if (Info->Hid != NULL)
{
Status = AcpiUtExecute_HID (Node, &Hid);
if (Status == AE_NOT_FOUND)
{
return (AE_OK);
}
else if (ACPI_FAILURE (Status))
{
return (AE_CTRL_DEPTH);
}
if (ACPI_STRNCMP (Hid.Value, Info->Hid, sizeof (Hid.Value)) != 0)
{
/* Get the list of Compatible IDs */
Status = AcpiUtExecute_CID (Node, &Cid);
if (Status == AE_NOT_FOUND)
{
return (AE_OK);
}
else if (ACPI_FAILURE (Status))
{
return (AE_CTRL_DEPTH);
}
/* Walk the CID list */
for (i = 0; i < Cid->Count; i++)
{
if (ACPI_STRNCMP (Cid->Id[i].Value, Info->Hid,
sizeof (ACPI_COMPATIBLE_ID)) != 0)
{
ACPI_FREE (Cid);
return (AE_OK);
}
}
ACPI_FREE (Cid);
}
}
Status = Info->UserFunction (ObjHandle, NestingLevel, Info->Context,
ReturnValue);
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);
}
