/**
Uninstalls all instances of a protocol:interfacer from a handle.
If the last protocol interface is remove from the handle, the
handle is freed.
@param UserHandle The handle to remove the protocol handler from
@param Protocol The protocol, of protocol:interface, to remove
@param Interface The interface, of protocol:interface, to remove
@retval EFI_INVALID_PARAMETER Protocol is NULL.
@retval EFI_SUCCESS Protocol interface successfully uninstalled.
**/
EFI_STATUS
EFIAPI
CoreUninstallProtocolInterface (
IN EFI_HANDLE UserHandle,
IN EFI_GUID *Protocol,
IN VOID *Interface
)
{
EFI_STATUS Status;
IHANDLE *Handle;
PROTOCOL_INTERFACE *Prot;
//
// Check that Protocol is valid
//
if (Protocol == NULL) {
return EFI_INVALID_PARAMETER;
}
//
// Check that UserHandle is a valid handle
//
Status = CoreValidateHandle (UserHandle);
if (EFI_ERROR (Status)) {
return Status;
}
//
// Lock the protocol database
//
CoreAcquireProtocolLock ();
//
// Check that Protocol exists on UserHandle, and Interface matches the interface in the database
//
Prot = CoreFindProtocolInterface (UserHandle, Protocol, Interface);
if (Prot == NULL) {
Status = EFI_NOT_FOUND;
goto Done;
}
//
// Attempt to disconnect all drivers that are using the protocol interface that is about to be removed
//
Status = CoreDisconnectControllersUsingProtocolInterface (
UserHandle,
Prot
);
if (EFI_ERROR (Status)) {
//
// One or more drivers refused to release, so return the error
//
goto Done;
}
//
// Remove the protocol interface from the protocol
//
Status = EFI_NOT_FOUND;
Handle = (IHANDLE *)UserHandle;
Prot = CoreRemoveInterfaceFromProtocol (Handle, Protocol, Interface);
if (Prot != NULL) {
//
// Update the Key to show that the handle has been created/modified
//
gHandleDatabaseKey++;
Handle->Key = gHandleDatabaseKey;
//
// Remove the protocol interface from the handle
//
RemoveEntryList (&Prot->Link);
//
// Free the memory
//
Prot->Signature = 0;
CoreFreePool (Prot);
Status = EFI_SUCCESS;
}
//
// If there are no more handlers for the handle, free the handle
//
if (IsListEmpty (&Handle->Protocols)) {
Handle->Signature = 0;
RemoveEntryList (&Handle->AllHandles);
CoreFreePool (Handle);
}
Done:
//
// Done, unlock the database and return
//
CoreReleaseProtocolLock ();
return Status;
}
EFI_BOOTSERVICE
EFI_STATUS
EFIAPI
CoreReinstallProtocolInterface (
IN EFI_HANDLE UserHandle,
IN EFI_GUID *Protocol,
IN VOID *OldInterface,
IN VOID *NewInterface
)
/*++
Routine Description:
Reinstall a protocol interface on a device handle. The OldInterface for Protocol is replaced by the NewInterface.
Arguments:
UserHandle - Handle on which the interface is to be reinstalled
Protocol - The numeric ID of the interface
OldInterface - A pointer to the old interface
NewInterface - A pointer to the new interface
Returns:
Status code.
On EFI_SUCCESS The protocol interface was installed
On EFI_NOT_FOUND The OldInterface on the handle was not found
On EFI_INVALID_PARAMETER One of the parameters has an invalid value
--*/
{
EFI_STATUS Status;
IHANDLE *Handle;
PROTOCOL_INTERFACE *Prot;
PROTOCOL_ENTRY *ProtEntry;
Status = CoreValidateHandle (UserHandle);
if (EFI_ERROR (Status)) {
return Status;
}
if (Protocol == NULL) {
return EFI_INVALID_PARAMETER;
}
Handle = (IHANDLE *) UserHandle;
//
// Lock the protocol database
//
CoreAcquireProtocolLock ();
//
// Check that Protocol exists on UserHandle, and Interface matches the interface in the database
//
Prot = CoreFindProtocolInterface (UserHandle, Protocol, OldInterface);
if (Prot == NULL) {
CoreReleaseProtocolLock ();
return EFI_NOT_FOUND;
}
//
// Attempt to disconnect all drivers that are using the protocol interface that is about to be reinstalled
//
Status = CoreDisconnectControllersUsingProtocolInterface (
UserHandle,
Prot
);
if (EFI_ERROR (Status)) {
//
// One or more drivers refused to release, so return the error
//
CoreReleaseProtocolLock ();
return Status;
}
//
// Remove the protocol interface from the protocol
//
Prot = CoreRemoveInterfaceFromProtocol (Handle, Protocol, OldInterface);
if (Prot == NULL) {
CoreReleaseProtocolLock ();
return EFI_NOT_FOUND;
}
ProtEntry = Prot->Protocol;
//
// Update the interface on the protocol
//
Prot->Interface = NewInterface;
//
// Add this protocol interface to the tail of the
// protocol entry
//
InsertTailList (&ProtEntry->Protocols, &Prot->ByProtocol);
//
// Update the Key to show that the handle has been created/modified
//
gHandleDatabaseKey++;
Handle->Key = gHandleDatabaseKey;
//
// Release the lock and connect all drivers to UserHandle
//
CoreReleaseProtocolLock ();
Status = CoreConnectController (
UserHandle,
NULL,
NULL,
TRUE
);
CoreAcquireProtocolLock ();
//
// Notify the notification list for this protocol
//
CoreNotifyProtocolEntry (ProtEntry);
CoreReleaseProtocolLock ();
return EFI_SUCCESS;
}
/**
Reinstall a protocol interface on a device handle. The OldInterface for Protocol is replaced by the NewInterface.
@param UserHandle Handle on which the interface is to be
reinstalled
@param Protocol The numeric ID of the interface
@param OldInterface A pointer to the old interface
@param NewInterface A pointer to the new interface
@retval EFI_SUCCESS The protocol interface was installed
@retval EFI_NOT_FOUND The OldInterface on the handle was not found
@retval EFI_INVALID_PARAMETER One of the parameters has an invalid value
**/
EFI_STATUS
EFIAPI
CoreReinstallProtocolInterface (
IN EFI_HANDLE UserHandle,
IN EFI_GUID *Protocol,
IN VOID *OldInterface,
IN VOID *NewInterface
)
{
EFI_STATUS Status;
IHANDLE *Handle;
PROTOCOL_INTERFACE *Prot;
PROTOCOL_ENTRY *ProtEntry;
Status = CoreValidateHandle (UserHandle);
if (EFI_ERROR (Status)) {
return Status;
}
if (Protocol == NULL) {
return EFI_INVALID_PARAMETER;
}
Handle = (IHANDLE *) UserHandle;
//
// Lock the protocol database
//
CoreAcquireProtocolLock ();
//
// Check that Protocol exists on UserHandle, and Interface matches the interface in the database
//
Prot = CoreFindProtocolInterface (UserHandle, Protocol, OldInterface);
if (Prot == NULL) {
Status = EFI_NOT_FOUND;
goto Done;
}
//
// Attempt to disconnect all drivers that are using the protocol interface that is about to be reinstalled
//
Status = CoreDisconnectControllersUsingProtocolInterface (
UserHandle,
Prot
);
if (EFI_ERROR (Status)) {
//
// One or more drivers refused to release, so return the error
//
goto Done;
}
//
// Remove the protocol interface from the protocol
//
Prot = CoreRemoveInterfaceFromProtocol (Handle, Protocol, OldInterface);
if (Prot == NULL) {
Status = EFI_NOT_FOUND;
goto Done;
}
ProtEntry = Prot->Protocol;
//
// Update the interface on the protocol
//
Prot->Interface = NewInterface;
//
// Add this protocol interface to the tail of the
// protocol entry
//
InsertTailList (&ProtEntry->Protocols, &Prot->ByProtocol);
//
// Update the Key to show that the handle has been created/modified
//
gHandleDatabaseKey++;
Handle->Key = gHandleDatabaseKey;
//
// Release the lock and connect all drivers to UserHandle
//
CoreReleaseProtocolLock ();
//
// Return code is ignored on purpose.
//
CoreConnectController (
UserHandle,
NULL,
NULL,
TRUE
);
CoreAcquireProtocolLock ();
//
// Notify the notification list for this protocol
//
CoreNotifyProtocolEntry (ProtEntry);
Status = EFI_SUCCESS;
Done:
CoreReleaseProtocolLock ();
return Status;
}
