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);
}
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);
}
