Revision: 14415
http://sourceforge.net/p/edk2/code/14415
Author: jljusten
Date: 2013-06-14 07:40:36 +0000 (Fri, 14 Jun 2013)
Log Message:
-----------
OvmfPkg: VirtioNetDxe: emulate Rx filter configuration: SNP.ReceiveFilters
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Laszlo Ersek <[email protected]>
Reviewed-by: Jordan Justen <[email protected]>
Reviewed-by: Stefan Hajnoczi <[email protected]>
Added Paths:
-----------
trunk/edk2/OvmfPkg/VirtioNetDxe/SnpReceiveFilters.c
Added: trunk/edk2/OvmfPkg/VirtioNetDxe/SnpReceiveFilters.c
===================================================================
--- trunk/edk2/OvmfPkg/VirtioNetDxe/SnpReceiveFilters.c
(rev 0)
+++ trunk/edk2/OvmfPkg/VirtioNetDxe/SnpReceiveFilters.c 2013-06-14 07:40:36 UTC
(rev 14415)
@@ -0,0 +1,105 @@
+/** @file
+
+ Implementation of the SNP.ReceiveFilters() function and its private helpers
+ if any.
+
+ Copyright (C) 2013, Red Hat, Inc.
+ Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>
+
+ This program and the accompanying materials are licensed and made available
+ under the terms and conditions of the BSD License which accompanies this
+ distribution. The full text of the license may be found at
+ http://opensource.org/licenses/bsd-license.php
+
+ THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, WITHOUT
+ WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+#include <Library/UefiBootServicesTableLib.h>
+
+#include "VirtioNet.h"
+
+/**
+ Manages the multicast receive filters of a network interface.
+
+ @param This The protocol instance pointer.
+ @param Enable A bit mask of receive filters to enable on the
+ network interface.
+ @param Disable A bit mask of receive filters to disable on the
+ network interface.
+ @param ResetMCastFilter Set to TRUE to reset the contents of the multicast
+ receive filters on the network interface to their
+ default values.
+ @param McastFilterCnt Number of multicast HW MAC addresses in the new
+ MCastFilter list. This value must be less than or
+ equal to the MCastFilterCnt field of
+ EFI_SIMPLE_NETWORK_MODE. This field is optional if
+ ResetMCastFilter is TRUE.
+ @param MCastFilter A pointer to a list of new multicast receive filter
+ HW MAC addresses. This list will replace any
+ existing multicast HW MAC address list. This field
+ is optional if ResetMCastFilter is TRUE.
+
+ @retval EFI_SUCCESS The multicast receive filter list was updated.
+ @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
+VirtioNetReceiveFilters (
+ IN EFI_SIMPLE_NETWORK_PROTOCOL *This,
+ IN UINT32 Enable,
+ IN UINT32 Disable,
+ IN BOOLEAN ResetMCastFilter,
+ IN UINTN MCastFilterCnt OPTIONAL,
+ IN EFI_MAC_ADDRESS *MCastFilter OPTIONAL
+ )
+{
+ 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;
+ }
+
+ //
+ // MNP apparently fails to initialize on top of us if we simply return
+ // EFI_UNSUPPORTED in this function.
+ //
+ // Hence we openly refuse multicast functionality, and fake the rest by
+ // selecting a no stricter filter setting than whatever is requested. The
+ // UEFI-2.3.1+errC spec allows this. In practice we don't change our current
+ // (default) filter. Additionally, receiving software is responsible for
+ // discarding any packets getting through the filter.
+ //
+ Status = (
+ ((Enable | Disable) & ~Dev->Snm.ReceiveFilterMask) != 0 ||
+ (!ResetMCastFilter && MCastFilterCnt > Dev->Snm.MaxMCastFilterCount)
+ ) ? EFI_INVALID_PARAMETER : EFI_SUCCESS;
+
+Exit:
+ gBS->RestoreTPL (OldTpl);
+ return Status;
+}
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