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| author | Laszlo Ersek <lersek@redhat.com> | 2013-06-14 07:40:36 +0000 |
|---|---|---|
| committer | jljusten <jljusten@6f19259b-4bc3-4df7-8a09-765794883524> | 2013-06-14 07:40:36 +0000 |
| commit | 1771d0a1ee9e5b7baf37fe78c22998380902f495 (patch) | |
| tree | 644ead390bb5fef4fb79c1ded671b488a45a0a48 /OvmfPkg/VirtioNetDxe/SnpReceiveFilters.c | |
| parent | f8ec2cc52c713a620df0fbd025ae8d01be10b31a (diff) | |
| download | edk2-1771d0a1ee9e5b7baf37fe78c22998380902f495.tar.gz edk2-1771d0a1ee9e5b7baf37fe78c22998380902f495.tar.bz2 edk2-1771d0a1ee9e5b7baf37fe78c22998380902f495.zip | |
OvmfPkg: VirtioNetDxe: emulate Rx filter configuration: SNP.ReceiveFilters
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@14415 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'OvmfPkg/VirtioNetDxe/SnpReceiveFilters.c')
| -rw-r--r-- | OvmfPkg/VirtioNetDxe/SnpReceiveFilters.c | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/OvmfPkg/VirtioNetDxe/SnpReceiveFilters.c b/OvmfPkg/VirtioNetDxe/SnpReceiveFilters.c new file mode 100644 index 0000000000..43e554fba2 --- /dev/null +++ b/OvmfPkg/VirtioNetDxe/SnpReceiveFilters.c @@ -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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