diff options
Diffstat (limited to 'OvmfPkg/VirtioNetDxe/SnpReceive.c')
| -rw-r--r-- | OvmfPkg/VirtioNetDxe/SnpReceive.c | 188 |
1 files changed, 0 insertions, 188 deletions
diff --git a/OvmfPkg/VirtioNetDxe/SnpReceive.c b/OvmfPkg/VirtioNetDxe/SnpReceive.c deleted file mode 100644 index 99abd7ebe4..0000000000 --- a/OvmfPkg/VirtioNetDxe/SnpReceive.c +++ /dev/null @@ -1,188 +0,0 @@ -/** @file
-
- Implementation of the SNP.Receive() function and its private helpers if any.
-
- Copyright (C) 2013, Red Hat, Inc.
- Copyright (c) 2006 - 2013, 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/BaseLib.h>
-#include <Library/BaseMemoryLib.h>
-#include <Library/UefiBootServicesTableLib.h>
-
-#include "VirtioNet.h"
-
-/**
- Receives a packet from a network interface.
-
- @param This The protocol instance pointer.
- @param HeaderSize The size, in bytes, of the media header received on the
- network interface. If this parameter is NULL, then the
- media header size will not be returned.
- @param BufferSize On entry, the size, in bytes, of Buffer. On exit, the
- size, in bytes, of the packet that was received on the
- network interface.
- @param Buffer A pointer to the data buffer to receive both the media
- header and the data.
- @param SrcAddr The source HW MAC address. If this parameter is NULL, the
- HW MAC source address will not be extracted from the media
- header.
- @param DestAddr The destination HW MAC address. If this parameter is NULL,
- the HW MAC destination address will not be extracted from
- the media header.
- @param Protocol The media header type. If this parameter is NULL, then the
- protocol will not be extracted from the media header. See
- RFC 1700 section "Ether Types" for examples.
-
- @retval EFI_SUCCESS The received data was stored in Buffer, and
- BufferSize has been updated to the number of
- bytes received.
- @retval EFI_NOT_STARTED The network interface has not been started.
- @retval EFI_NOT_READY The network interface is too busy to accept
- this transmit request.
- @retval EFI_BUFFER_TOO_SMALL The BufferSize parameter is too small.
- @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
-VirtioNetReceive (
- IN EFI_SIMPLE_NETWORK_PROTOCOL *This,
- OUT UINTN *HeaderSize OPTIONAL,
- IN OUT UINTN *BufferSize,
- OUT VOID *Buffer,
- OUT EFI_MAC_ADDRESS *SrcAddr OPTIONAL,
- OUT EFI_MAC_ADDRESS *DestAddr OPTIONAL,
- OUT UINT16 *Protocol OPTIONAL
- )
-{
- VNET_DEV *Dev;
- EFI_TPL OldTpl;
- EFI_STATUS Status;
- UINT16 RxCurUsed;
- UINT16 UsedElemIdx;
- UINT32 DescIdx;
- UINT32 RxLen;
- UINTN OrigBufferSize;
- UINT8 *RxPtr;
- UINT16 AvailIdx;
- EFI_STATUS NotifyStatus;
-
- if (This == NULL || BufferSize == NULL || Buffer == 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;
- }
-
- //
- // virtio-0.9.5, 2.4.2 Receiving Used Buffers From the Device
- //
- MemoryFence ();
- RxCurUsed = *Dev->RxRing.Used.Idx;
- MemoryFence ();
-
- if (Dev->RxLastUsed == RxCurUsed) {
- Status = EFI_NOT_READY;
- goto Exit;
- }
-
- UsedElemIdx = Dev->RxLastUsed % Dev->RxRing.QueueSize;
- DescIdx = Dev->RxRing.Used.UsedElem[UsedElemIdx].Id;
- RxLen = Dev->RxRing.Used.UsedElem[UsedElemIdx].Len;
-
- //
- // the virtio-net request header must be complete; we skip it
- //
- ASSERT (RxLen >= Dev->RxRing.Desc[DescIdx].Len);
- RxLen -= Dev->RxRing.Desc[DescIdx].Len;
- //
- // the host must not have filled in more data than requested
- //
- ASSERT (RxLen <= Dev->RxRing.Desc[DescIdx + 1].Len);
-
- OrigBufferSize = *BufferSize;
- *BufferSize = RxLen;
-
- if (OrigBufferSize < RxLen) {
- Status = EFI_BUFFER_TOO_SMALL;
- goto Exit; // keep the packet
- }
-
- if (RxLen < Dev->Snm.MediaHeaderSize) {
- Status = EFI_DEVICE_ERROR;
- goto RecycleDesc; // drop useless short packet
- }
-
- if (HeaderSize != NULL) {
- *HeaderSize = Dev->Snm.MediaHeaderSize;
- }
-
- RxPtr = (UINT8 *)(UINTN) Dev->RxRing.Desc[DescIdx + 1].Addr;
- CopyMem (Buffer, RxPtr, RxLen);
-
- if (DestAddr != NULL) {
- CopyMem (DestAddr, RxPtr, SIZE_OF_VNET (Mac));
- }
- RxPtr += SIZE_OF_VNET (Mac);
-
- if (SrcAddr != NULL) {
- CopyMem (SrcAddr, RxPtr, SIZE_OF_VNET (Mac));
- }
- RxPtr += SIZE_OF_VNET (Mac);
-
- if (Protocol != NULL) {
- *Protocol = (UINT16) ((RxPtr[0] << 8) | RxPtr[1]);
- }
- RxPtr += sizeof (UINT16);
-
- Status = EFI_SUCCESS;
-
-RecycleDesc:
- ++Dev->RxLastUsed;
-
- //
- // virtio-0.9.5, 2.4.1 Supplying Buffers to The Device
- //
- AvailIdx = *Dev->RxRing.Avail.Idx;
- Dev->RxRing.Avail.Ring[AvailIdx++ % Dev->RxRing.QueueSize] =
- (UINT16) DescIdx;
-
- MemoryFence ();
- *Dev->RxRing.Avail.Idx = AvailIdx;
-
- MemoryFence ();
- NotifyStatus = Dev->VirtIo->SetQueueNotify (Dev->VirtIo, VIRTIO_NET_Q_RX);
- if (!EFI_ERROR (Status)) { // earlier error takes precedence
- Status = NotifyStatus;
- }
-
-Exit:
- gBS->RestoreTPL (OldTpl);
- return Status;
-}
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