OvmfPkg: Apply uncrustify changes

[mirror_edk2.git] / OvmfPkg / VirtioNetDxe / SnpReceiveFilters.c

/** @file\r
\r
  Implementation of the SNP.ReceiveFilters() function and its private helpers\r
  if any.\r
\r
  Copyright (C) 2013, Red Hat, Inc.\r
  Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>\r
\r
  SPDX-License-Identifier: BSD-2-Clause-Patent\r
\r
**/\r
\r
#include <Library/UefiBootServicesTableLib.h>\r
\r
#include "VirtioNet.h"\r
\r
/**\r
  Manages the multicast receive filters of a network interface.\r
\r
  @param  This             The protocol instance pointer.\r
  @param  Enable           A bit mask of receive filters to enable on the\r
                           network interface.\r
  @param  Disable          A bit mask of receive filters to disable on the\r
                           network interface.\r
  @param  ResetMCastFilter Set to TRUE to reset the contents of the multicast\r
                           receive filters on the network interface to their\r
                           default values.\r
  @param  McastFilterCnt   Number of multicast HW MAC addresses in the new\r
                           MCastFilter list. This value must be less than or\r
                           equal to the MCastFilterCnt field of\r
                           EFI_SIMPLE_NETWORK_MODE. This field is optional if\r
                           ResetMCastFilter is TRUE.\r
  @param  MCastFilter      A pointer to a list of new multicast receive filter\r
                           HW MAC addresses. This list will replace any\r
                           existing multicast HW MAC address list. This field\r
                           is optional if ResetMCastFilter is TRUE.\r
\r
  @retval EFI_SUCCESS           The multicast receive filter list was updated.\r
  @retval EFI_NOT_STARTED       The network interface has not been started.\r
  @retval EFI_INVALID_PARAMETER One or more of the parameters has an\r
                                unsupported value.\r
  @retval EFI_DEVICE_ERROR      The command could not be sent to the network\r
                                interface.\r
  @retval EFI_UNSUPPORTED       This function is not supported by the network\r
                                interface.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
VirtioNetReceiveFilters (\r
  IN EFI_SIMPLE_NETWORK_PROTOCOL  *This,\r
  IN UINT32                       Enable,\r
  IN UINT32                       Disable,\r
  IN BOOLEAN                      ResetMCastFilter,\r
  IN UINTN                        MCastFilterCnt    OPTIONAL,\r
  IN EFI_MAC_ADDRESS              *MCastFilter      OPTIONAL\r
  )\r
{\r
  VNET_DEV    *Dev;\r
  EFI_TPL     OldTpl;\r
  EFI_STATUS  Status;\r
\r
  if (This == NULL) {\r
    return EFI_INVALID_PARAMETER;\r
  }\r
\r
  Dev    = VIRTIO_NET_FROM_SNP (This);\r
  OldTpl = gBS->RaiseTPL (TPL_CALLBACK);\r
  switch (Dev->Snm.State) {\r
    case EfiSimpleNetworkStopped:\r
      Status = EFI_NOT_STARTED;\r
      goto Exit;\r
    case EfiSimpleNetworkStarted:\r
      Status = EFI_DEVICE_ERROR;\r
      goto Exit;\r
    default:\r
      break;\r
  }\r
\r
  //\r
  // MNP apparently fails to initialize on top of us if we simply return\r
  // EFI_UNSUPPORTED in this function.\r
  //\r
  // Hence we openly refuse multicast functionality, and fake the rest by\r
  // selecting a no stricter filter setting than whatever is requested. The\r
  // UEFI-2.3.1+errC spec allows this. In practice we don't change our current\r
  // (default) filter. Additionally, receiving software is responsible for\r
  // discarding any packets getting through the filter.\r
  //\r
  Status = (\r
            ((Enable | Disable) & ~Dev->Snm.ReceiveFilterMask) != 0 ||\r
            (!ResetMCastFilter && MCastFilterCnt > Dev->Snm.MaxMCastFilterCount)\r
            ) ? EFI_INVALID_PARAMETER : EFI_SUCCESS;\r
\r
Exit:\r
  gBS->RestoreTPL (OldTpl);\r
  return Status;\r
}\r