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audk/NetworkPkg/SnpDxe/Transmit.c

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/** @file
Implementation of transmitting a packet.
Copyright (c) 2004 - 2018, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include "Snp.h"
/**
Call UNDI to create the meadia header for the given data buffer.
@param Snp Pointer to SNP driver structure.
@param MacHeaderPtr Address where the media header will be filled in.
@param HeaderSize Size of the memory at MacHeaderPtr.
@param Buffer Data buffer pointer.
@param BufferSize Size of data in the Buffer
@param DestAddr Address of the destination mac address buffer.
@param SrcAddr Address of the source mac address buffer.
@param ProtocolPtr Address of the protocol type.
@retval EFI_SUCCESS Successfully completed the undi call.
@retval Other Error return from undi call.
**/
EFI_STATUS
PxeFillHeader (
SNP_DRIVER *Snp,
VOID *MacHeaderPtr,
UINTN HeaderSize,
VOID *Buffer,
UINTN BufferSize,
EFI_MAC_ADDRESS *DestAddr,
EFI_MAC_ADDRESS *SrcAddr,
UINT16 *ProtocolPtr
)
{
PXE_CPB_FILL_HEADER_FRAGMENTED *Cpb;
Cpb = Snp->Cpb;
if (SrcAddr != NULL) {
CopyMem (
(VOID *) Cpb->SrcAddr,
(VOID *) SrcAddr,
Snp->Mode.HwAddressSize
);
} else {
CopyMem (
(VOID *) Cpb->SrcAddr,
(VOID *) &(Snp->Mode.CurrentAddress),
Snp->Mode.HwAddressSize
);
}
CopyMem (
(VOID *) Cpb->DestAddr,
(VOID *) DestAddr,
Snp->Mode.HwAddressSize
);
//
// we need to do the byte swapping
//
Cpb->Protocol = (UINT16) PXE_SWAP_UINT16 (*ProtocolPtr);
Cpb->PacketLen = (UINT32) (BufferSize);
Cpb->MediaHeaderLen = (UINT16) HeaderSize;
Cpb->FragCnt = 2;
Cpb->reserved = 0;
Cpb->FragDesc[0].FragAddr = (UINT64)(UINTN) MacHeaderPtr;
Cpb->FragDesc[0].FragLen = (UINT32) HeaderSize;
Cpb->FragDesc[1].FragAddr = (UINT64)(UINTN) Buffer;
Cpb->FragDesc[1].FragLen = (UINT32) BufferSize;
Cpb->FragDesc[0].reserved = Cpb->FragDesc[1].reserved = 0;
Snp->Cdb.OpCode = PXE_OPCODE_FILL_HEADER;
Snp->Cdb.OpFlags = PXE_OPFLAGS_FILL_HEADER_FRAGMENTED;
Snp->Cdb.DBsize = PXE_DBSIZE_NOT_USED;
Snp->Cdb.DBaddr = PXE_DBADDR_NOT_USED;
Snp->Cdb.CPBsize = (UINT16) sizeof (PXE_CPB_FILL_HEADER_FRAGMENTED);
Snp->Cdb.CPBaddr = (UINT64)(UINTN) Cpb;
Snp->Cdb.StatCode = PXE_STATCODE_INITIALIZE;
Snp->Cdb.StatFlags = PXE_STATFLAGS_INITIALIZE;
Snp->Cdb.IFnum = Snp->IfNum;
Snp->Cdb.Control = PXE_CONTROL_LAST_CDB_IN_LIST;
//
// Issue UNDI command and check result.
//
DEBUG ((EFI_D_NET, "\nSnp->undi.fill_header() "));
(*Snp->IssueUndi32Command) ((UINT64) (UINTN) &Snp->Cdb);
switch (Snp->Cdb.StatCode) {
case PXE_STATCODE_SUCCESS:
return EFI_SUCCESS;
case PXE_STATCODE_INVALID_PARAMETER:
DEBUG (
(EFI_D_ERROR,
"\nSnp->undi.fill_header() %xh:%xh\n",
Snp->Cdb.StatFlags,
Snp->Cdb.StatCode)
);
return EFI_INVALID_PARAMETER;
default:
DEBUG (
(EFI_D_ERROR,
"\nSnp->undi.fill_header() %xh:%xh\n",
Snp->Cdb.StatFlags,
Snp->Cdb.StatCode)
);
return EFI_DEVICE_ERROR;
}
}
/**
This routine calls undi to transmit the given data buffer
@param Snp pointer to SNP driver structure
@param Buffer data buffer pointer
@param BufferSize Size of data in the Buffer
@retval EFI_SUCCESS if successfully completed the undi call
@retval Other error return from undi call.
**/
EFI_STATUS
PxeTransmit (
SNP_DRIVER *Snp,
VOID *Buffer,
UINTN BufferSize
)
{
PXE_CPB_TRANSMIT *Cpb;
EFI_STATUS Status;
Cpb = Snp->Cpb;
Cpb->FrameAddr = (UINT64) (UINTN) Buffer;
Cpb->DataLen = (UINT32) BufferSize;
Cpb->MediaheaderLen = 0;
Cpb->reserved = 0;
Snp->Cdb.OpFlags = PXE_OPFLAGS_TRANSMIT_WHOLE;
Snp->Cdb.CPBsize = (UINT16) sizeof (PXE_CPB_TRANSMIT);
Snp->Cdb.CPBaddr = (UINT64)(UINTN) Cpb;
Snp->Cdb.OpCode = PXE_OPCODE_TRANSMIT;
Snp->Cdb.DBsize = PXE_DBSIZE_NOT_USED;
Snp->Cdb.DBaddr = PXE_DBADDR_NOT_USED;
Snp->Cdb.StatCode = PXE_STATCODE_INITIALIZE;
Snp->Cdb.StatFlags = PXE_STATFLAGS_INITIALIZE;
Snp->Cdb.IFnum = Snp->IfNum;
Snp->Cdb.Control = PXE_CONTROL_LAST_CDB_IN_LIST;
//
// Issue UNDI command and check result.
//
DEBUG ((EFI_D_NET, "\nSnp->undi.transmit() "));
DEBUG ((EFI_D_NET, "\nSnp->Cdb.OpCode == %x", Snp->Cdb.OpCode));
DEBUG ((EFI_D_NET, "\nSnp->Cdb.CPBaddr == %LX", Snp->Cdb.CPBaddr));
DEBUG ((EFI_D_NET, "\nSnp->Cdb.DBaddr == %LX", Snp->Cdb.DBaddr));
DEBUG ((EFI_D_NET, "\nCpb->FrameAddr == %LX\n", Cpb->FrameAddr));
(*Snp->IssueUndi32Command) ((UINT64) (UINTN) &Snp->Cdb);
DEBUG ((EFI_D_NET, "\nexit Snp->undi.transmit() "));
//
// we will unmap the buffers in get_status call, not here
//
switch (Snp->Cdb.StatCode) {
case PXE_STATCODE_SUCCESS:
return EFI_SUCCESS;
case PXE_STATCODE_BUFFER_FULL:
case PXE_STATCODE_QUEUE_FULL:
case PXE_STATCODE_BUSY:
Status = EFI_NOT_READY;
DEBUG (
(EFI_D_NET,
"\nSnp->undi.transmit() %xh:%xh\n",
Snp->Cdb.StatFlags,
Snp->Cdb.StatCode)
);
break;
default:
DEBUG (
(EFI_D_ERROR,
"\nSnp->undi.transmit() %xh:%xh\n",
Snp->Cdb.StatFlags,
Snp->Cdb.StatCode)
);
Status = EFI_DEVICE_ERROR;
}
return Status;
}
/**
Places a packet in the transmit queue of a network interface.
This function places the packet specified by Header and Buffer on the transmit
queue. If HeaderSize is nonzero and HeaderSize is not equal to
This->Mode->MediaHeaderSize, then EFI_INVALID_PARAMETER will be returned. If
BufferSize is less than This->Mode->MediaHeaderSize, then EFI_BUFFER_TOO_SMALL
will be returned. If Buffer is NULL, then EFI_INVALID_PARAMETER will be
returned. If HeaderSize is nonzero and DestAddr or Protocol is NULL, then
EFI_INVALID_PARAMETER will be returned. If the transmit engine of the network
interface is busy, then EFI_NOT_READY will be returned. If this packet can be
accepted by the transmit engine of the network interface, the packet contents
specified by Buffer will be placed on the transmit queue of the network
interface, and EFI_SUCCESS will be returned. GetStatus() can be used to
determine when the packet has actually been transmitted. The contents of the
Buffer must not be modified until the packet has actually been transmitted.
The Transmit() function performs nonblocking I/O. A caller who wants to perform
blocking I/O, should call Transmit(), and then GetStatus() until the
transmitted buffer shows up in the recycled transmit buffer.
If the driver has not been initialized, EFI_DEVICE_ERROR will be returned.
@param This A pointer to the EFI_SIMPLE_NETWORK_PROTOCOL instance.
@param HeaderSize The size, in bytes, of the media header to be filled in by the
Transmit() function. If HeaderSize is nonzero, 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 nonzero, 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 nonzero 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
SnpUndi32Transmit (
IN EFI_SIMPLE_NETWORK_PROTOCOL *This,
IN UINTN HeaderSize,
IN UINTN BufferSize,
IN VOID *Buffer,
IN EFI_MAC_ADDRESS *SrcAddr, OPTIONAL
IN EFI_MAC_ADDRESS *DestAddr, OPTIONAL
IN UINT16 *Protocol OPTIONAL
)
{
SNP_DRIVER *Snp;
EFI_STATUS Status;
EFI_TPL OldTpl;
if (This == NULL) {
return EFI_INVALID_PARAMETER;
}
Snp = EFI_SIMPLE_NETWORK_DEV_FROM_THIS (This);
OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
if (Snp == NULL) {
return EFI_DEVICE_ERROR;
}
switch (Snp->Mode.State) {
case EfiSimpleNetworkInitialized:
break;
case EfiSimpleNetworkStopped:
Status = EFI_NOT_STARTED;
goto ON_EXIT;
default:
Status = EFI_DEVICE_ERROR;
goto ON_EXIT;
}
if (Buffer == NULL) {
Status = EFI_INVALID_PARAMETER;
goto ON_EXIT;
}
if (BufferSize < Snp->Mode.MediaHeaderSize) {
Status = EFI_BUFFER_TOO_SMALL;
goto ON_EXIT;
}
//
// if the HeaderSize is non-zero, we need to fill up the header and for that
// we need the destination address and the protocol
//
if (HeaderSize != 0) {
if (HeaderSize != Snp->Mode.MediaHeaderSize || DestAddr == 0 || Protocol == 0) {
Status = EFI_INVALID_PARAMETER;
goto ON_EXIT;
}
Status = PxeFillHeader (
Snp,
Buffer,
HeaderSize,
(UINT8 *) Buffer + HeaderSize,
BufferSize - HeaderSize,
DestAddr,
SrcAddr,
Protocol
);
if (EFI_ERROR (Status)) {
goto ON_EXIT;
}
}
Status = PxeTransmit (Snp, Buffer, BufferSize);
ON_EXIT:
gBS->RestoreTPL (OldTpl);
return Status;
}
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