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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>
Copyright (c) 2017, AMD Inc, All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#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;
}
Dev->VirtIo->SetDeviceStatus (Dev->VirtIo, 0);
VirtioNetShutdownRx (Dev);
VirtioNetShutdownTx (Dev);
VirtioNetUninitRing (Dev, &Dev->TxRing, Dev->TxRingMap);
VirtioNetUninitRing (Dev, &Dev->RxRing, Dev->RxRingMap);
Dev->Snm.State = EfiSimpleNetworkStarted;
Status = EFI_SUCCESS;
Exit:
gBS->RestoreTPL (OldTpl);
return Status;
}
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