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_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);
}
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);
}
static ACPI_STATUS
acpi_ns_get_device_callback (
ACPI_HANDLE obj_handle,
u32 nesting_level,
void *context,
void **return_value)
{
ACPI_STATUS status;
ACPI_NAMESPACE_NODE *node;
u32 flags;
DEVICE_ID device_id;
ACPI_GET_DEVICES_INFO *info;
info = context;
acpi_cm_acquire_mutex (ACPI_MTX_NAMESPACE);
node = acpi_ns_convert_handle_to_entry (obj_handle);
if (!node) {
acpi_cm_release_mutex (ACPI_MTX_NAMESPACE);
return (AE_BAD_PARAMETER);
}
acpi_cm_release_mutex (ACPI_MTX_NAMESPACE);
/*
* Run _STA to determine if device is present
*/
status = acpi_cm_execute_STA (node, &flags);
if (ACPI_FAILURE (status)) {
return (status);
}
if (!(flags & 0x01)) {
/* don't return at the device or children of the device if not there */
return (AE_CTRL_DEPTH);
}
/*
* Filter based on device HID
*/
if (info->hid != NULL) {
status = acpi_cm_execute_HID (node, &device_id);
if (status == AE_NOT_FOUND) {
return (AE_OK);
}
else if (ACPI_FAILURE (status)) {
return (status);
}
if (STRNCMP (device_id.buffer, info->hid, sizeof (device_id.buffer)) != 0) {
return (AE_OK);
}
}
info->user_function (obj_handle, nesting_level, info->context, return_value);
return (AE_OK);
}
