static int VEthXmit(struct sk_buff *pSkb_p, struct net_device *pNetDevice_p)
{
tEplKernel Ret = kEplSuccessful;
tEplFrameInfo FrameInfo;
//transmit function
struct net_device_stats *pStats = netdev_priv(pNetDevice_p);
//save timestemp
pNetDevice_p->trans_start = jiffies;
FrameInfo.m_pFrame = (tEplFrame *) pSkb_p->data;
FrameInfo.m_uiFrameSize = pSkb_p->len;
//call send fkt on DLL
Ret = EplDllkCalAsyncSend(&FrameInfo, kEplDllAsyncReqPrioGeneric);
if (Ret != kEplSuccessful) {
EPL_DBGLVL_VETH_TRACE1
("VEthXmit: EplDllkCalAsyncSend returned 0x%02X\n", Ret);
netif_stop_queue(pNetDevice_p);
goto Exit;
} else {
EPL_DBGLVL_VETH_TRACE0("VEthXmit: frame passed to DLL\n");
dev_kfree_skb(pSkb_p);
//set stats for the device
pStats->tx_packets++;
pStats->tx_bytes += FrameInfo.m_uiFrameSize;
}
Exit:
return 0;
}
tEplKernel EplDlluCalAsyncSend(tEplFrameInfo * pFrameInfo_p,
tEplDllAsyncReqPriority Priority_p)
{
tEplKernel Ret = kEplSuccessful;
#if(((EPL_MODULE_INTEGRATION) & (EPL_MODULE_DLLK)) != 0)
pFrameInfo_p->m_uiFrameSize += 14; // add size of ethernet header
Ret = EplDllkCalAsyncSend(pFrameInfo_p, Priority_p);
#else
Ret = kEplSuccessful;
#endif
return Ret;
}
//---------------------------------------------------------------------------
//
// Function: VEthApiXmit
//
// Description: Transmit a TX frame
//
// Parameters: pData_p = point to packet buffer
// wDataSize = size of packet
//
// Returns: kEplApiInvalidParam - maximum MTU is reached
// kEplDllAsyncTxBuffer - internal buffer is full
// kEplInvalidOperation - Send not allowed in this state
// kEplSuccessful - message sent successfully
//
// State:
//
//---------------------------------------------------------------------------
tEplKernel PUBLIC VEthApiXmit(BYTE *pData_p, WORD wDataSize)
{
tEplKernel Ret = kEplSuccessful;
tEplFrameInfo FrameInfo;
tEplNmtState NmtState;
//check POWERLINK state
NmtState = EplNmtuGetNmtState();
if(NmtState <= kEplNmtCsNotActive || NmtState == kEplNmtMsNotActive)
{
Ret = kEplInvalidOperation;
EPL_DBGLVL_VETH_TRACE("VEthXmit: Error while transmitting! Invalid "
"state: 0x%x!\n", NmtState);
goto Exit;
}
//check MTU
if(wDataSize > VEthInstance_g.m_wMtu)
{
Ret = kEplApiInvalidParam;
EPL_DBGLVL_VETH_TRACE("VEthXmit: Error while transmitting! MTU is set to "
"%d and frame has size %d!\n", VEthInstance_g.m_wMtu, wDataSize);
goto Exit;
}
//save frame and size
FrameInfo.m_pFrame = (tEplFrame *)pData_p;
FrameInfo.m_uiFrameSize = wDataSize;
//call send function on DLL
Ret = EplDllkCalAsyncSend(&FrameInfo, kEplDllAsyncReqPrioGeneric, kEplDllAsyncBuffVeth);
switch(Ret)
{
case kEplSuccessful:
//set stats for the device
VEthInstance_g.m_Statistics.m_dwMsgsent++;
goto Exit;
case kEplDllAsyncTxBufferFull:
//buffer is full
VEthInstance_g.m_Statistics.m_dwTxBufferFull++;
goto Exit;
default:
EPL_DBGLVL_VETH_TRACE("VEthXmit: EplDllkCalAsyncSend returned 0x%02X\n", Ret);
goto Exit;
}
Exit:
return Ret;
}
