OvmfPkg/VirtioNetDxe/SnpStop.c

   1 /** @file
   2
   3   Implementation of the SNP.Stop() function and its private helpers if any.
   4
   5   Copyright (C) 2013, Red Hat, Inc.
   6   Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>
   7
   8   SPDX-License-Identifier: BSD-2-Clause-Patent
   9
  10 **/
  11
  12 #include <Library/UefiBootServicesTableLib.h>
  13
  14 #include "VirtioNet.h"
  15
  16 /**
  17   Changes the state of a network interface from "started" to "stopped".
  18
  19   @param  This Protocol instance pointer.
  20
  21   @retval EFI_SUCCESS           The network interface was stopped.
  22   @retval EFI_ALREADY_STARTED   The network interface is already in the stopped
  23                                 state.
  24   @retval EFI_INVALID_PARAMETER One or more of the parameters has an
  25                                 unsupported value.
  26   @retval EFI_DEVICE_ERROR      The command could not be sent to the network
  27                                 interface.
  28   @retval EFI_UNSUPPORTED       This function is not supported by the network
  29                                 interface.
  30
  31 **/
  32
  33 EFI_STATUS
  34 EFIAPI
  35 VirtioNetStop (
  36   IN EFI_SIMPLE_NETWORK_PROTOCOL *This
  37   )
  38 {
  39   VNET_DEV   *Dev;
  40   EFI_TPL    OldTpl;
  41   EFI_STATUS Status;
  42
  43   if (This == NULL) {
  44     return EFI_INVALID_PARAMETER;
  45   }
  46
  47   Dev = VIRTIO_NET_FROM_SNP (This);
  48   OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
  49   if (Dev->Snm.State != EfiSimpleNetworkStarted) {
  50     Status = EFI_NOT_STARTED;
  51   }
  52   else {
  53     Dev->Snm.State = EfiSimpleNetworkStopped;
  54     Status = EFI_SUCCESS;
  55   }
  56
  57   gBS->RestoreTPL (OldTpl);
  58   return Status;
  59 }