OvmfPkg/VirtioNetDxe/SnpSharedHelpers.c

   1 /** @file
   2
   3   Helper functions used by at least two Simple Network Protocol methods.
   4
   5   Copyright (C) 2013, Red Hat, Inc.
   6
   7   This program and the accompanying materials are licensed and made available
   8   under the terms and conditions of the BSD License which accompanies this
   9   distribution. The full text of the license may be found at
  10   http://opensource.org/licenses/bsd-license.php
  11
  12   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, WITHOUT
  13   WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  14
  15 **/
  16
  17 #include <Library/MemoryAllocationLib.h>
  18
  19 #include "VirtioNet.h"
  20
  21 /**
  22   Release RX and TX resources on the boundary of the
  23   EfiSimpleNetworkInitialized state.
  24
  25   These functions contribute to rolling back a partial, failed initialization
  26   of the virtio-net SNP driver instance, or to shutting down a fully
  27   initialized, running instance.
  28
  29   They are only callable by the VirtioNetInitialize() and the
  30   VirtioNetShutdown() SNP methods. See the state diagram in "VirtioNet.h".
  31
  32   @param[in,out] Dev  The VNET_DEV driver instance being shut down, or whose
  33                       partial, failed initialization is being rolled back.
  34 */
  35
  36 VOID
  37 EFIAPI
  38 VirtioNetShutdownRx (
  39   IN OUT VNET_DEV *Dev
  40   )
  41 {
  42   FreePool (Dev->RxBuf);
  43 }
  44
  45
  46 VOID
  47 EFIAPI
  48 VirtioNetShutdownTx (
  49   IN OUT VNET_DEV *Dev
  50   )
  51 {
  52   FreePool (Dev->TxFreeStack);
  53 }