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/** @file
Implementation of the SNP.Shutdown() function and its private helpers if any.
Copyright (C) 2013, Red Hat, Inc.
Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials are licensed and made available
under the terms and conditions of the BSD License which accompanies this
distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, WITHOUT
WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#include <Library/UefiBootServicesTableLib.h>
#include "VirtioNet.h"
/**
Resets a network adapter and leaves it in a state that is safe for another
driver to initialize.
@param This Protocol instance pointer.
@retval EFI_SUCCESS The network interface was shutdown.
@retval EFI_NOT_STARTED The network interface has not been started.
@retval EFI_INVALID_PARAMETER One or more of the parameters has an
unsupported value.
@retval EFI_DEVICE_ERROR The command could not be sent to the network
interface.
@retval EFI_UNSUPPORTED This function is not supported by the network
interface.
**/
EFI_STATUS
EFIAPI
VirtioNetShutdown (
IN EFI_SIMPLE_NETWORK_PROTOCOL *This
)
{
VNET_DEV *Dev;
EFI_TPL OldTpl;
EFI_STATUS Status;
if (This == NULL) {
return EFI_INVALID_PARAMETER;
}
Dev = VIRTIO_NET_FROM_SNP (This);
OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
switch (Dev->Snm.State) {
case EfiSimpleNetworkStopped:
Status = EFI_NOT_STARTED;
goto Exit;
case EfiSimpleNetworkStarted:
Status = EFI_DEVICE_ERROR;
goto Exit;
default:
break;
}
VIRTIO_CFG_WRITE (Dev, Generic.VhdrDeviceStatus, 0);
VirtioNetShutdownRx (Dev);
VirtioNetShutdownTx (Dev);
VirtioRingUninit (&Dev->TxRing);
VirtioRingUninit (&Dev->RxRing);
Dev->Snm.State = EfiSimpleNetworkStarted;
Status = EFI_SUCCESS;
Exit:
gBS->RestoreTPL (OldTpl);
return Status;
}
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