--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/baseport/src/cedar/generic/base/syborg/ethernet/pdd/ethernet_device.cpp	Fri Jul 31 14:43:15 2009 +0100
@@ -0,0 +1,411 @@
+/*
+* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of the License "Eclipse Public License v1.0"
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description:
+*
+*/
+
+#include <ethernet.h>
+#include <e32hal.h>
+#include <e32cmn.h> 
+#include "ethernet_device.h"
+
+// Constants specific to this file
+const TInt K1000mSecDelay	= 1000;
+
+/////////////////////////////////////////
+// Implementation of EthernetDevice class
+/////////////////////////////////////////
+
+EthernetDevice::EthernetDevice() : iRxDfc(RxDfc, this)
+{
+	DP("** (PDD) EthernetDevice()");
+		
+	iInterruptId=-1;
+	iCreated = FALSE;
+	iStarted = FALSE;
+	iRxDfc.SetDfcQ(Kern::DfcQue0());
+}
+
+EthernetDevice::~EthernetDevice()
+{
+	DP("** (PDD) ~EthernetDevice()");
+	DP("** (PDD) ~EthernetDevice Unbind Interrupt");
+	Interrupt::Unbind(EIntNet0);
+}
+
+void EthernetDevice::GetConfig(TEthernetConfigV01 &aConfig) const
+{
+	DP("** (PDD) EthernetDevice::GetConfig");
+	aConfig = iDefaultConfig;
+}
+
+TInt EthernetDevice::ValidateConfig(const TEthernetConfigV01 &aConfig) const
+{
+	DP("** (PDD) EthernetDevice::ValidateConfig");
+		
+	switch(aConfig.iEthSpeed)
+	{
+		case KEthSpeedUnknown:
+			return KErrNotSupported;
+		default:		
+			break;
+	}
+
+	switch(aConfig.iEthDuplex)
+	{
+		case KEthDuplexUnknown:
+			return KErrNotSupported;
+		default:
+			break;
+	}
+
+	return KErrNone;
+}
+
+void EthernetDevice::Caps(TDes8 &aCaps) const
+{
+	DP("** (PDD) EthernetDevice::Caps");
+	TEthernetCaps capsBuf;
+
+	aCaps.FillZ(aCaps.MaxLength());
+	aCaps=capsBuf.Left(Min(capsBuf.Length(),aCaps.MaxLength()));
+}
+
+TDfcQue* EthernetDevice::DfcQ(TInt aUnit)
+{
+	DP("** (PDD) EthernetDevice::DfcQ");
+	return Kern::DfcQue0();
+}
+
+TInt EthernetDevice::DisableIrqs()
+{
+	DP("** (PDD) EthernetDevice::DisableIrqs");
+	return NKern::DisableInterrupts(1);
+}
+
+void EthernetDevice::RestoreIrqs(TInt aLevel)
+{
+	DP("** (PDD) EthernetDevice::RestoreIrqs");
+	NKern::RestoreInterrupts(aLevel);
+}
+
+//
+// Enable Ethernet interrupt line, allocate memory for Rx/Tx paths and send QEMU frames for Rx transmission.  
+//
+TInt EthernetDevice::DoCreate(TInt aUnit, const TDesC8* anInfo)
+{
+	DP("** (PDD) Enter: EthernetDevice::DoCreate");
+	
+	if(iCreated)
+		return KErrNone;
+	
+	// Bind to Ethernet interrupt
+	Interrupt::Bind(EIntNet0,Isr,this);
+	SetMacAddress();
+	
+	DP("** (PDD) EthernetDevice::DoCreate - VNET[VIRTIO_STATUS]");
+	
+   VNET[VIRTIO_STATUS] = VIRTIO_CONFIG_S_ACKNOWLEDGE
+     			| VIRTIO_CONFIG_S_DRIVER;
+	 
+   AllocRings();
+	VNET[VIRTIO_STATUS] |= VIRTIO_CONFIG_S_DRIVER_OK;
+   AddRx();
+	VNET[VIRTIO_INT_ENABLE] = 1;
+	  
+	iCreated = TRUE;
+	
+	DP("** (PDD) Exit: EthernetDevice::DoCreate");
+	
+	return KErrNone;
+}
+
+TInt EthernetDevice::Start()
+{
+	DP("** (PDD) EthernetDevice::Start()");
+		
+	if(iStarted)
+		return KErrNone;
+		   			       		   			   
+    // wait for 1 sec as negotiation is going on... hopefully auto-neg completes by then
+ 	NKern::Sleep(K1000mSecDelay);
+ 	Interrupt::Enable(EIntNet0);
+	
+	iStarted = TRUE;
+	
+	return KErrNone;
+}
+
+void EthernetDevice::Stop(TStopMode aMode)
+{
+	DP("** (PDD) EthernetDevice::Stop(TStopMode aMode)");
+		
+	switch (aMode)
+	{
+		case EStopNormal:
+		case EStopEmergency:
+			iRxDfc.Cancel();
+         //Should we disable QEMU interrupts here?
+			break;					
+        default:
+            break;
+	}
+	
+	iStarted = FALSE;	
+	Interrupt::Disable(EIntNet0);
+}
+
+//
+// Transmit Tx data to QEMU and increment iTxAvail idx counter to indicate to QEMU that a new frame is available.  
+//
+TInt EthernetDevice::Send(TBuf8<KMaxEthernetPacket+32> &aBuffer)
+{
+	DP("** (PDD) EthernetDevice::Send");
+		
+	TInt err = KErrNone;
+	TUint32 length = aBuffer.Length();
+	iTxBuffer = aBuffer;
+
+   DP ("** (PDD) Value of iTxAvail->idx = %d\n", iTxAvail->idx);	
+   TInt ring_slot = iTxAvail->idx & (tx_ring_size - 1);
+   DP ("** (PDD) Value of ring_slot = %d\n", ring_slot);
+
+   memset(&tx_header, 0, sizeof(tx_header));
+
+   iTxDesc[0].addr = Epoc::LinearToPhysical((TUint32)&tx_header);
+   iTxDesc[0].len = sizeof(tx_header);
+   iTxDesc[0].flags = VRING_DESC_F_NEXT;
+   iTxDesc[0].next = 1;
+   iTxDesc[1].addr = Epoc::LinearToPhysical((TUint32) iTxBuffer.Ptr());
+   iTxDesc[1].len = length;
+   iTxDesc[1].flags = 0;
+   iTxAvail->ring[ring_slot] = 0;
+
+   iTxAvail->idx++;   
+   DP ("** (PDD)iTxAvail->idx = %x, rx_last_used=%d\n", iTxAvail->idx, rx_last_used);
+  
+   VNET[VIRTIO_QUEUE_NOTIFY] = TX_QUEUE;
+
+   DP ("** (PDD) iTxDesc[0].addr = %x\n", iTxDesc[0].addr);
+   DP ("** (PDD) iTxDesc[0].len = %d\n", iTxDesc[0].len);
+   DP ("** (PDD) iTxDesc[0].flags = %d\n", iTxDesc[0].flags);
+   DP ("** (PDD) iTxDesc[0].next = %d\n", iTxDesc[0].next);
+   DP ("** (PDD) iTxDesc[1].addr = %x\n", iTxDesc[1].addr);
+   DP ("** (PDD) iTxDesc[1].len = %d\n", iTxDesc[1].len);
+   DP ("** (PDD) iTxDesc[1].flags = %d\n", iTxDesc[1].flags);
+    					 	   		
+	return err;
+}
+
+TInt EthernetDevice::ReceiveFrame(TBuf8<KMaxEthernetPacket+32> &aBuffer, 
+									TBool okToUse)
+{
+	DP("** (PDD) EthernetDevice::ReceiveFrame");
+    
+   //If no buffer available dump frame
+   if (!okToUse)
+   {
+    DP("** (PDD) EthernetDevice::ReceiveFrame - dumping frame");
+    return KErrGeneral;
+   }
+   
+   aBuffer.Copy(iRxBuffer.Ptr(), ETHERNET_PAYLOAD_SIZE); 
+   AddRx();
+ 
+	return KErrNone;
+}
+
+void EthernetDevice::Isr(TAny* aPtr)
+{
+	DP("** (PDD) EthernetDevice::Isr(TAny* aPtr)");
+
+   Interrupt::Clear(EIntNet0);	
+   VNET[VIRTIO_INT_STATUS] = 1;
+   EthernetDevice& d=*(EthernetDevice*)aPtr;
+   d.iRxDfc.Add();                   			
+}
+
+void EthernetDevice::RxDfc(TAny* aPtr)
+{
+	DP("** (PDD) EthernetDevice::RxDfc");
+	EthernetDevice& d=*(EthernetDevice*)aPtr;
+   
+   TInt x = VNET[VIRTIO_INT_STATUS];
+   DP("** (PDD) EthernetDevice::RxDfc - value of x=%d", x);
+
+   TInt ring_slot = d.iRxUsed->idx & (d.rx_ring_size - 1);
+
+   DP("**(PDD) RxDfc  (d.iTxAvail->idx) = %d (d.iRxAvail->idx) = %d", d.iTxAvail->idx, d.iRxAvail->idx);
+   DP("**(PDD) RxDfc  (d.iRxUsed->idx) = %d ", d.iRxUsed->idx);
+   DP("**(PDD) RxDfc  ring_slot=%d,  (d.iRxUsed->ring[%d].id) = %d", ring_slot, ring_slot, d.iRxUsed->ring[ring_slot].id);
+   DP("**(PDD) RxDfc  d.iRxDesc[1].next = %d", d.iRxDesc[1].next); 
+
+   //check to see if this is a Rx or Tx
+   if (d.iRxUsed->idx != d.rx_last_used)
+   {
+   DP("** (PDD) Received Rx Interrupt");
+   d.rx_last_used++;
+   DP("** (PDD) Value of rx_last_used=%d", d.rx_last_used);
+   d.ReceiveIsr();
+   }
+}
+
+void EthernetDevice::MacConfigure(TEthernetConfigV01 &aConfig)
+{
+	DP("** (PDD) EthernetDevice::MacConfigure");
+	
+	iDefaultConfig.iEthAddress[0] = aConfig.iEthAddress[0];
+	iDefaultConfig.iEthAddress[1] = aConfig.iEthAddress[1];
+	iDefaultConfig.iEthAddress[2] = aConfig.iEthAddress[2];
+	iDefaultConfig.iEthAddress[3] = aConfig.iEthAddress[3];
+	iDefaultConfig.iEthAddress[4] = aConfig.iEthAddress[4];
+	iDefaultConfig.iEthAddress[5] = aConfig.iEthAddress[5];
+	
+	DP ("** (PDD) macaddr %02x:%02x:%02x:%02x:%02x:%02x\n",
+			iDefaultConfig.iEthAddress[0], 
+			iDefaultConfig.iEthAddress[1], 
+			iDefaultConfig.iEthAddress[2], 
+			iDefaultConfig.iEthAddress[3], 
+			iDefaultConfig.iEthAddress[4], 
+			iDefaultConfig.iEthAddress[5]);
+}
+
+//Descriptor list and vring_used must start on a 4k page boundary. 
+TAny * EthernetDevice::AllocAligned(TUint16 size)
+{
+	DP("** (PDD) Enter: EthernetDevice::alloc_aligned");
+	DP("** (PDD) size=%d",size);
+
+   TAny * p = Kern::Alloc(size + 4095);
+	
+   DP("** (PDD) BEFORE: p=%x",p);
+   p = (TAny *)(((TUint32)p + 4095) & ~4095);
+   DP("** (PDD) AFTER: p=%x",p);
+	
+	DP("** (PDD) Exit: EthernetDevice::alloc_aligned");
+	
+	return p;
+}
+	
+TAny EthernetDevice::AllocRings()
+{	
+	DP("** (PDD) Enter: EthernetDevice::AllocRings");
+	
+	TUint size;
+	TUint used_offset;
+	TUint32 p;
+
+	VNET[VIRTIO_QUEUE_SEL] = TX_QUEUE;
+   tx_ring_size = VNET[VIRTIO_QUEUE_NUM];
+
+	DP ("** (PDD) tx_ring_size = %d\n", tx_ring_size);
+	
+	size = (tx_ring_size * (16 + 2)) + 4;
+	used_offset = (size + 4095) & ~1024;
+	DP ("** (PDD) used_offset = %d", used_offset);
+	size = used_offset + 4 + (tx_ring_size * 8);
+	DP ("** (PDD) size = %d", size);
+	
+	p = (TUint32)AllocAligned(size);
+	DP ("** (PDD) p = %x\n", p);
+
+	VNET[VIRTIO_QUEUE_BASE] = Epoc::LinearToPhysical(p);
+
+	iTxDesc = reinterpret_cast<vring_desc*>(p);
+	iTxAvail = reinterpret_cast<vring_avail*>(p + tx_ring_size * 16);
+	iTxUsed = reinterpret_cast<vring_used*>(p + used_offset); 
+    
+   DP ("** (PDD) iTxDesc = %x", iTxDesc);
+   DP ("** (PDD) iTxAvail = %x", iTxAvail);
+   DP ("** (PDD) iTxUsed = %x", iTxUsed);
+    
+	VNET[VIRTIO_QUEUE_SEL] = RX_QUEUE;
+	rx_ring_size = VNET[VIRTIO_QUEUE_NUM];
+	
+	size = (rx_ring_size * (16 + 2)) + 4;
+	used_offset = (size + 4095) & ~4095;
+	size = used_offset + 4 + (rx_ring_size * 8);
+	p = (TUint32)AllocAligned(size);
+    DP ("** (PDD)  p = %x\n", p);
+	VNET[VIRTIO_QUEUE_BASE] = Epoc::LinearToPhysical(p);
+	
+	iRxDesc = reinterpret_cast<vring_desc*>(p);
+	iRxAvail = reinterpret_cast<vring_avail*>(p + rx_ring_size * 16);
+	iRxUsed = reinterpret_cast<vring_used*>(p + used_offset);
+
+    DP ("** (PDD) iRxDesc = %x", iRxDesc);
+    DP ("** (PDD) iRxAvail = %x", iRxAvail);
+    DP ("** (PDD) iRxUsed = %x", iRxUsed);
+
+	DP("** (PDD) Exit: EthernetDevice::AllocRings");
+}
+
+void EthernetDevice::AddRx()
+{
+    DP("** (PDD) Enter: EthernetDevice::AddRx"); 
+   
+    TInt n = iRxAvail->idx & (rx_ring_size - 1);
+    memset(&rx_header, 0, sizeof(rx_header));
+    iRxDesc[0].addr = Epoc::LinearToPhysical((TUint32)&rx_header);
+    iRxDesc[0].len = sizeof(rx_header);
+    iRxDesc[0].flags = VRING_DESC_F_NEXT | VRING_DESC_F_WRITE;
+    iRxDesc[0].next = 1;
+    iRxDesc[1].addr = Epoc::LinearToPhysical((TUint32) iRxBuffer.Ptr());
+    iRxDesc[1].len = ETHERNET_PAYLOAD_SIZE;
+    iRxDesc[1].flags = VRING_DESC_F_WRITE;
+    iRxAvail->ring[n] = 0;
+    iRxAvail->idx++;
+    VNET[VIRTIO_QUEUE_NOTIFY] = RX_QUEUE;
+
+    DP("** (PDD) Exit: EthernetDevice::AddRx");
+}
+
+
+
+void EthernetDevice::SetMacAddress(void)
+	{
+	DP("** (PDD) Enter: EthernetDevice::SetMacAddress");
+	
+	iDefaultConfig.iEthAddress[0] = VNET_MAC[0];
+	iDefaultConfig.iEthAddress[1] = VNET_MAC[1];
+	iDefaultConfig.iEthAddress[2] = VNET_MAC[2];
+	iDefaultConfig.iEthAddress[3] = VNET_MAC[3];
+	iDefaultConfig.iEthAddress[4] = VNET_MAC[4];
+	iDefaultConfig.iEthAddress[5] = VNET_MAC[5];
+	
+	DP ("** (PDD) macaddr %02x:%02x:%02x:%02x:%02x:%02x\n",
+			iDefaultConfig.iEthAddress[0], 
+			iDefaultConfig.iEthAddress[1], 
+			iDefaultConfig.iEthAddress[2], 
+			iDefaultConfig.iEthAddress[3], 
+			iDefaultConfig.iEthAddress[4], 
+			iDefaultConfig.iEthAddress[5]);
+	
+	DP("** (PDD) Exit: EthernetDevice::SetMacAddress");
+	}
+
+//
+// Functions that are just stubs
+//
+
+void EthernetDevice::CheckConfig(TEthernetConfigV01& aConfig)
+{
+	DP("** (PDD) EthernetDevice::CheckConfig");
+}
+
+TInt EthernetDevice::Configure(TEthernetConfigV01 &aConfig)
+{
+	DP("** (PDD) EthernetDevice::Configure");
+	return KErrNone;
+}