SnpShutdown.c

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#include <Library/UefiBootServicesTableLib.h>
 
#include "VirtioNet.h"
 
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;
}