diff options
Diffstat (limited to 'OvmfPkg/VirtioNetDxe/SnpTransmit.c')
| -rw-r--r-- | OvmfPkg/VirtioNetDxe/SnpTransmit.c | 169 |
1 files changed, 0 insertions, 169 deletions
diff --git a/OvmfPkg/VirtioNetDxe/SnpTransmit.c b/OvmfPkg/VirtioNetDxe/SnpTransmit.c deleted file mode 100644 index 7ca40d5d06..0000000000 --- a/OvmfPkg/VirtioNetDxe/SnpTransmit.c +++ /dev/null @@ -1,169 +0,0 @@ -/** @file
-
- Implementation of the SNP.Transmit() 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"
-
-/**
- Places a packet in the transmit queue of a network interface.
-
- @param This The protocol instance pointer.
- @param HeaderSize The size, in bytes, of the media header to be filled in by
- the Transmit() function. If HeaderSize is non-zero, then
- it must be equal to This->Mode->MediaHeaderSize and the
- DestAddr and Protocol parameters must not be NULL.
- @param BufferSize The size, in bytes, of the entire packet (media header and
- data) to be transmitted through the network interface.
- @param Buffer A pointer to the packet (media header followed by data) to
- be transmitted. This parameter cannot be NULL. If
- HeaderSize is zero, then the media header in Buffer must
- already be filled in by the caller. If HeaderSize is
- non-zero, then the media header will be filled in by the
- Transmit() function.
- @param SrcAddr The source HW MAC address. If HeaderSize is zero, then
- this parameter is ignored. If HeaderSize is non-zero and
- SrcAddr is NULL, then This->Mode->CurrentAddress is used
- for the source HW MAC address.
- @param DestAddr The destination HW MAC address. If HeaderSize is zero,
- then this parameter is ignored.
- @param Protocol The type of header to build. If HeaderSize is zero, then
- this parameter is ignored. See RFC 1700, section "Ether
- Types", for examples.
-
- @retval EFI_SUCCESS The packet was placed on the transmit queue.
- @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
-VirtioNetTransmit (
- IN EFI_SIMPLE_NETWORK_PROTOCOL *This,
- IN UINTN HeaderSize,
- IN UINTN BufferSize,
- IN /* +OUT! */ VOID *Buffer,
- IN EFI_MAC_ADDRESS *SrcAddr OPTIONAL,
- IN EFI_MAC_ADDRESS *DestAddr OPTIONAL,
- IN UINT16 *Protocol OPTIONAL
- )
-{
- VNET_DEV *Dev;
- EFI_TPL OldTpl;
- EFI_STATUS Status;
- UINT16 DescIdx;
- UINT16 AvailIdx;
-
- if (This == NULL || BufferSize == 0 || 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;
- }
-
- if (BufferSize < Dev->Snm.MediaHeaderSize) {
- Status = EFI_BUFFER_TOO_SMALL;
- goto Exit;
- }
- if (BufferSize > Dev->Snm.MediaHeaderSize + Dev->Snm.MaxPacketSize) {
- Status = EFI_INVALID_PARAMETER;
- goto Exit;
- }
-
- //
- // check if we have room for transmission
- //
- ASSERT (Dev->TxCurPending <= Dev->TxMaxPending);
- if (Dev->TxCurPending == Dev->TxMaxPending) {
- Status = EFI_NOT_READY;
- goto Exit;
- }
-
- //
- // the caller may want us to fill in the media header:
- // dst MAC, src MAC, Ethertype
- //
- if (HeaderSize != 0) {
- UINT8 *Ptr;
-
- if (HeaderSize != Dev->Snm.MediaHeaderSize ||
- DestAddr == NULL || Protocol == NULL) {
- Status = EFI_INVALID_PARAMETER;
- goto Exit;
- }
- Ptr = Buffer;
- ASSERT (SIZE_OF_VNET (Mac) <= sizeof (EFI_MAC_ADDRESS));
-
- CopyMem (Ptr, DestAddr, SIZE_OF_VNET (Mac));
- Ptr += SIZE_OF_VNET (Mac);
-
- CopyMem (Ptr,
- (SrcAddr == NULL) ? &Dev->Snm.CurrentAddress : SrcAddr,
- SIZE_OF_VNET (Mac));
- Ptr += SIZE_OF_VNET (Mac);
-
- *Ptr++ = (UINT8) (*Protocol >> 8);
- *Ptr++ = (UINT8) *Protocol;
-
- ASSERT ((UINTN) (Ptr - (UINT8 *) Buffer) == Dev->Snm.MediaHeaderSize);
- }
-
- //
- // virtio-0.9.5, 2.4.1 Supplying Buffers to The Device
- //
- DescIdx = Dev->TxFreeStack[Dev->TxCurPending++];
- Dev->TxRing.Desc[DescIdx + 1].Addr = (UINTN) Buffer;
- Dev->TxRing.Desc[DescIdx + 1].Len = (UINT32) BufferSize;
-
- //
- // the available index is never written by the host, we can read it back
- // without a barrier
- //
- AvailIdx = *Dev->TxRing.Avail.Idx;
- Dev->TxRing.Avail.Ring[AvailIdx++ % Dev->TxRing.QueueSize] = DescIdx;
-
- MemoryFence ();
- *Dev->TxRing.Avail.Idx = AvailIdx;
-
- MemoryFence ();
- Status = Dev->VirtIo->SetQueueNotify (Dev->VirtIo, VIRTIO_NET_Q_TX);
-
-Exit:
- gBS->RestoreTPL (OldTpl);
- return Status;
-}
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