i82557.cpp   [plain text]


/*
 * Copyright (c) 1998-2000 Apple Computer, Inc. All rights reserved.
 *
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 * 
 * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
 * 
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this
 * file.
 * 
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 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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/*
 * Copyright (c) 1996 NeXT Software, Inc.  All rights reserved. 
 *
 * i82557.cpp
 *
 * HISTORY
 *
 * 22-Jan-96	Dieter Siegmund (dieter) at NeXT
 *	Created.
 *
 * 03-May-96	Dieter Siegmund (dieter) at NeXT
 *	Added a real ISR to improve performance.
 *
 * 10-June-96	Dieter Siegmund (dieter) at NeXT
 *	Added support for Splash 3 (10 Base-T only card).
 *
 * 18-June-96	Dieter Siegmund (dieter) at NeXT
 *	Keep the transmit queue draining by interrupting every
 *	N / 2 transmits (where N is the size of the hardware queue).
 *
 * 15-Dec-97	Joe Liu (jliu) at Apple
 *	Updated PHY programming to be 82558 aware.
 *	Misc changes to conform to new 82558 register flags.
 *	Changed RNR interrupt handler to restart RU instead of a reset.
 *	Interrupt handler now does a thread_call_func() to do most of its work.
 *	Interrupts are disabled until the thread callout finishes its work.
 *	Increased the size of TX/RX rings.
 *	buffer object removed, we use cluster mbufs to back up the receive ring.
 *
 * 29-May-98	Joe Liu (jliu) at Apple
 *	Updated _setupPhy method to take advantage of parallel detection whenever
 *	possible in order to detect the proper link speed.
 *
 * 17-Aug-98	Joe Liu (jliu) at Apple
 *	Re-enabled the setting of txready_sel PHY (PCS) bit for DP83840.
 *	Simplified interrupt handling, resulting in RCV performance improvements.
 *	Receive packets are sent upstream via a cached function pointer.
 */

#include "i82557.h"

#define ONE_SECOND_TICKS			1000
#define LOAD_STATISTICS_INTERVAL	(4 * ONE_SECOND_TICKS)

#define super IOEthernetController
OSDefineMetaClassAndStructors( Intel82557, IOEthernetController )

//---------------------------------------------------------------------------
// Function: pciConfigInit
//
// Update PCI command register to enable the memory-mapped range,
// and bus-master interface.

bool Intel82557::pciConfigInit(IOPCIDevice * provider)
{
	UInt16 reg16;

	reg16 = provider->configRead16( kIOPCIConfigCommand );

    reg16 |= ( kIOPCICommandBusMaster       |
               kIOPCICommandMemorySpace     |
               kIOPCICommandMemWrInvalidate );

    reg16 &= ~kIOPCICommandIOSpace;  // disable I/O space

	provider->configWrite16( kIOPCIConfigCommand, reg16 );

    // To allow the device to use the PCI Memory Write and Invalidate
    // command, it must know the correct cache line size. The only
    // supported cache line sizes are 8 and 16 Dwords.
    //
    // Do not modify the cache line size register. Leave this up
    // to the platform's firmware.
    // provider->configWrite8( kIOPCIConfigCacheLineSize, 8 );

    // Locate the PM register block of this device in its PCI config space.

    provider->findPCICapability( kIOPCIPowerManagementCapability,
                                 &pmPCICapPtr );
    if ( pmPCICapPtr  )
    {
        UInt16 pciPMCReg = provider->configRead32( pmPCICapPtr ) >> 16;

        // Only devices that support PME# assertion from D3-cold are
        // considered valid for supporting Magic Packet wakeup.

        if ( pciPMCReg & kPCIPMCPMESupportFromD3Cold )
        {
            magicPacketSupported = true;
        }
        
        // Clear PME# and set power state to D0.

        provider->configWrite16( kPCIPMCSR, 0x8000 );
        IOSleep( 10 );
    }

	return true;
}

//---------------------------------------------------------------------------
// Function: initDriver
//
// Create and initialize driver objects before the hardware is 
// enabled.
//
// Returns true on sucess, and false if initialization failed.

bool Intel82557::initDriver(IOService * provider)
{
	currentMediumType = MEDIUM_TYPE_INVALID;

	// This driver will allocate and use an IOGatedOutputQueue.
	//
	transmitQueue = getOutputQueue();
	if ( transmitQueue == 0 ) return false;

	// Allocate two IOMbufLittleMemoryCursor instances. One for transmit and
	// the other for receive.
	//
	rxMbufCursor = IOMbufLittleMemoryCursor::withSpecification(MAX_BUF_SIZE,1);
	txMbufCursor = IOMbufLittleMemoryCursor::withSpecification(MAX_BUF_SIZE, 
	                                                           TBDS_PER_TCB);
	if (!rxMbufCursor || !txMbufCursor)
		return false;

	// Get a handle to our superclass' workloop.
	//
	IOWorkLoop * myWorkLoop = (IOWorkLoop *) getWorkLoop();
	if (!myWorkLoop)
		return false;

	// Create and register an interrupt event source. The provider will
	// take care of the low-level interrupt registration stuff.
	//
	interruptSrc = IOInterruptEventSource::interruptEventSource(
                   this,
                   (IOInterruptEventAction) &Intel82557::interruptOccurred,
                   provider);

	if (!interruptSrc ||
		(myWorkLoop->addEventSource(interruptSrc) != kIOReturnSuccess))
		return false;

	// This is important. If the interrupt line is shared with other devices,
    // then the interrupt vector will be enabled only if all corresponding
    // interrupt event sources are enabled. To avoid masking interrupts for
    // other devices that are sharing the interrupt line, the event source
    // is enabled immediately.

    interruptSrc->enable();

	// Register a timer event source. This is used as a watchdog timer.
	//
	timerSrc = IOTimerEventSource::timerEventSource( this,
               (IOTimerEventSource::Action) &Intel82557::timeoutOccurred );
	if (!timerSrc ||
		(myWorkLoop->addEventSource(timerSrc) != kIOReturnSuccess))
		return false;

	// Create a dictionary to hold IONetworkMedium objects.
	//
	mediumDict = OSDictionary::withCapacity(5);
	if (!mediumDict)
		return false;

	return true;
}

//---------------------------------------------------------------------------
// Function: getDefaultSettings
//
// Get the default driver settings chosen by the user. The properties
// are all stored in our property table (an OSDictionary).

bool Intel82557::getDefaultSettings()
{
	OSNumber *  numObj;

    // Check for PHY address override.
	//
    phyAddr = PHY_ADDRESS_DEFAULT;
	numObj  = OSDynamicCast( OSNumber, getProperty("PHY Address") );
	if ( numObj )
    {
		phyAddr = numObj->unsigned32BitValue();
    }

    // Check for Verbose flag.
	//
    verbose = false;
	if ( getProperty("Verbose") == kOSBooleanTrue )
    {
		IOLog("%s: verbose mode enabled\n", getName());
		verbose = true;
	}

    // Check for Flow-Control enable flag.
	//
    flowControl = false;
    if ( getProperty("Flow Control") == kOSBooleanTrue )
    {
		VPRINT("%s: 802.3x flow control enabled\n", getName());
		flowControl = true;
	}

    // The number of bytes that must be present in the FIFO before the
    // transmission on the wire begins. The value read from the table
    // is divided by 8 to yield the value programmed to the TxCB.
    // The range is from 1 to 0xE0.

    txThreshold8 = TCB_TX_THRESHOLD;
    numObj = OSDynamicCast( OSNumber, getProperty("Transmit Threshold") );
    if ( numObj && numObj->unsigned32BitValue() >= 8 )
    {
        txThreshold8 = min( 0xE0, numObj->unsigned32BitValue() / 8 );
        VPRINT("%s: transmit threshold 0x%x\n", getName(), txThreshold8);
    }

	return true;
}

//---------------------------------------------------------------------------
// Function: start <IOService>
//
// Hardware was detected and initialized, start the driver.

bool Intel82557::start( IOService * provider )
{
    bool ret     = false;
    bool started = false;

    do {
        // Start our superclass first.

        if ( super::start(provider) == false )
            break;

        started = true;

        // Cache our provider to an instance variable.

        pciNub = OSDynamicCast(IOPCIDevice, provider);
        if ( pciNub == 0 ) break;

        // Retain provider, released in free().

        pciNub->retain();

        // Open our provider.

        if ( pciNub->open(this) == false ) break;

        // Request domain power.
        // Without this, the PCIDevice may be in state 0, and the
        // PCI config space may be invalid if the machine has been
        // sleeping.

        if ( pciNub->requestPowerDomainState(
        /* power flags */ kIOPMPowerOn,
        /* connection  */ (IOPowerConnection *) getParentEntry(gIOPowerPlane),
        /* spec        */ IOPMLowestState ) != IOPMNoErr )
        {
            break;
        }

        // Initialize the driver's event sources and other support objects.

        if ( initDriver(provider) == false ) break;

        // Get the virtual address mapping of CSR registers located at
        // Base Address Range 0 (0x10). The size of this range is 4K.
        // This was changed to 32 bytes in 82558 A-Step, though only
        // the first 32 bytes should be accessed, and the other bytes
        // are considered reserved.

        csrMap = pciNub->mapDeviceMemoryWithRegister( kIOPCIConfigBaseAddress0 );
        if ( csrMap == 0 ) break;
        
        CSR_p  = (CSR_t *) csrMap->getVirtualAddress();

        // Setup our PCI config space.

        if ( pciConfigInit(pciNub) == false ) break;

        // Create the EEPROM object.

        eeprom = i82557eeprom::withAddress(&CSR_p->eepromControl);
        if ( eeprom == 0 )
        {
            IOLog("%s: couldn't allocate eeprom object", getName());
			break;
        }

        // Get default driver settings (stored in property table).

        if ( getDefaultSettings() == false ) break;

        if ( verbose ) eeprom->dumpContents();

        // Execute one-time initialization code.

        if ( coldInit() == false )
        {
            VPRINT("%s: coldInit failed\n", getName());
            break;
        }

        if ( hwInit() == false )
        {
            VPRINT("%s: hwInit failed\n", getName());
            break;
        }

        // Publish our media capabilities.

        _phyPublishMedia();
        if ( publishMediumDictionary(mediumDict) == false )
        {
            VPRINT("%s: publishMediumDictionary failed\n", getName());
			break;
        }

#if 0
        // Announce the basic hardware configuration info.
        IOLog("%s: Memory 0x%lx irq %d\n", getName(),
              csrMap->getPhysicalAddress(), 0);
#endif

        ret = true;
    }
    while ( false );

    // Close our provider, it will be re-opened on demand when
    // our enable() method is called.

    if ( pciNub ) pciNub->close(this);

    do {
        if ( ret == false ) break;

        ret = false;

        // Allocate and attach an IOEthernetInterface instance to this driver
        // object.

        if ( attachInterface((IONetworkInterface **) &netif, false) == false )
            break;

        // Attach a kernel debugger client. This is not an essential service,
        // and the return is not checked.

        attachDebuggerClient(&debugger);

        // Start matching for clients of IONetworkInterface.

        netif->registerService();
        
        ret = true;
    }
    while ( false );

    // Issue a stop on failure.

    if (started && !ret) super::stop(provider);

    return ret;
}

//---------------------------------------------------------------------------
// Function: stop <IOService>
//
// Stop all activities and prepare for termination.

void Intel82557::stop(IOService * provider)
{
    super::stop(provider);
}

//---------------------------------------------------------------------------
// Function: createWorkLoop <IONetworkController>
//
// Override IONetworkController::createWorkLoop() method to create and return
// a new work loop object.

bool Intel82557::createWorkLoop()
{
    workLoop = IOWorkLoop::workLoop();

    return ( workLoop != 0 );
}

//---------------------------------------------------------------------------
// Function: getWorkLoop <IOService>
//
// Override IOService::getWorkLoop() method and return a reference to our
// work loop.

IOWorkLoop * Intel82557::getWorkLoop() const
{
    return workLoop;
}

//---------------------------------------------------------------------------
// Function: configureInterface <IONetworkController>
//
// Configure a newly instantiated IONetworkInterface object.

bool Intel82557::configureInterface(IONetworkInterface * netif)
{
	IONetworkData * data;
	
	if ( super::configureInterface(netif) == false )
		return false;
	
	// Get the generic network statistics structure.

	data = netif->getParameter(kIONetworkStatsKey);
	if (!data || !(netStats = (IONetworkStats *) data->getBuffer())) {
		return false;
	}

	// Get the Ethernet statistics structure.

	data = netif->getParameter(kIOEthernetStatsKey);
	if (!data || !(etherStats = (IOEthernetStats *) data->getBuffer())) {
		return false;
	}
	
	return true;
}

//---------------------------------------------------------------------------
// Function: free <IOService>
//
// Deallocate all resources and destroy the instance.

void Intel82557::free()
{
#define RELEASE(x) do { if(x) { (x)->release(); (x) = 0; } } while(0)

	RELEASE( debugger     );
    RELEASE( netif        );

    if ( interruptSrc && workLoop )
    {
        workLoop->removeEventSource( interruptSrc );
    }

	RELEASE( interruptSrc );
	RELEASE( timerSrc     );
	RELEASE( rxMbufCursor );
	RELEASE( txMbufCursor );
	RELEASE( csrMap       );
	RELEASE( eeprom       );
	RELEASE( mediumDict   );
    RELEASE( pciNub       );
    RELEASE( workLoop     );

	freePageBlock( &shared );
	freePageBlock( &txRing );
	freePageBlock( &rxRing );

    if ( powerOffThreadCall )
    {
        thread_call_free( powerOffThreadCall );
        powerOffThreadCall = 0;
    }
    
    if ( powerOnThreadCall )
    {
        thread_call_free( powerOnThreadCall );
        powerOnThreadCall = 0;
    }

	super::free();	// pass it to our superclass
}

//---------------------------------------------------------------------------
// Function: enableAdapter
//
// Enables the adapter & driver to the given level of support.

bool Intel82557::enableAdapter(UInt32 level)
{
	bool ret = false;

//	IOLog("%s::%s enabling level %ld\n", getName(), __FUNCTION__, level);

	switch (level) {
		case kActivationLevel1:

            // Open provider.
            //
            if ( ( pciNub == 0 ) || ( pciNub->open(this) == false ) )
            {
                break;
            }

            if ( hwInit() == false )
            {
                VPRINT("%s: hwInit failed\n", getName());
                break;
            }

			if (!_initRingBuffers())
				break;
		
			if (!_startReceive()) {
				_clearRingBuffers();
				break;
			}
		
			// Set current medium.
			//
			if (selectMedium(getCurrentMedium()) != kIOReturnSuccess)
				VPRINT("%s: selectMedium error\n", getName());

			// Start the watchdog timer.
			//
			timerSrc->setTimeoutMS(LOAD_STATISTICS_INTERVAL);

			// Enable hardware interrupt sources.

			enableAdapterInterrupts();

            // Force PHY to report link status.
            //
            _phyReportLinkStatus(true);

			ret = true;
			break;
		
		case kActivationLevel2:
			// Issue a dump statistics command.
			//
			_dumpStatistics();

			// Start our IOOutputQueue object.
			//
			transmitQueue->setCapacity(TRANSMIT_QUEUE_SIZE);
			transmitQueue->start();

			ret = true;
			break;
	}

	if (!ret)
		VPRINT("%s::%s error in level %ld\n", getName(), __FUNCTION__, level);

	return ret;
}

//---------------------------------------------------------------------------
// Function: disableAdapter
//
// Disables the adapter & driver to the given level of support.

bool Intel82557::disableAdapter(UInt32 level)
{
	bool ret = false;

//	IOLog("%s::%s disabling level %ld\n", getName(), __FUNCTION__, level);
		
	switch (level) {
		case kActivationLevel1:
			// Disable hardware interrupt sources.
			//
			disableAdapterInterrupts();

			// Stop the timer event source, and initialize the watchdog state.
			//
			timerSrc->cancelTimeout();
			packetsReceived    = true;	// assume we're getting packets
			packetsTransmitted = false;
			txCount = 0;
		
			// Reset the hardware engine.
			//
			ret = hwInit( true );

			// Clear the descriptor rings after the hardware is idle.
			//
			_clearRingBuffers();
		
			// Report link status: valid and down.
			//
			setLinkStatus( kIONetworkLinkValid );

			// Flush all packets held in the queue and prevent it
			// from accumulating any additional packets.
			//
			transmitQueue->setCapacity(0);
			transmitQueue->flush();

            // Close provider.
            //
            if ( pciNub )
            {
                pciNub->close(this);
            }

			break;
		
		case kActivationLevel2:
			// Stop the transmit queue. outputPacket() will not get called
			// after this.
			//
			transmitQueue->stop();

			ret = true;
			break;
	}

	if (!ret)
		VPRINT("%s::%s error in level %ld\n", getName(), __FUNCTION__, level);

	return ret;
}

//---------------------------------------------------------------------------
// Function: setActivationLevel
//
// Sets the adapter's activation level.
//
// kActivationLevel0 - Adapter is disabled.
// kActivationLevel1 - Adapter is brought up just enough to support debugging.
// kActivationLevel2 - Adapter is completely up.

bool Intel82557::setActivationLevel(UInt32 level)
{
	bool    ret = false;
	UInt32  nextLevel;

    // IOLog("---> DESIRED LEVEL : %d\n", level);

	if (currentLevel == level) return true;

	for ( ; currentLevel > level; currentLevel--) 
	{
		if ( (ret = disableAdapter(currentLevel)) == false )
			break;
	}

	for ( nextLevel = currentLevel + 1;
          currentLevel < level; 
	      currentLevel++, nextLevel++ ) 
	{
		if ( (ret = enableAdapter(nextLevel)) == false )
			break;
	}

    // IOLog("---> PRESENT LEVEL : %d\n\n", currentLevel);

	return ret;
}

//---------------------------------------------------------------------------
// Function: enable <IONetworkController>
//
// A request from our interface client to enable the adapter.

IOReturn Intel82557::enable(IONetworkInterface * /*netif*/)
{
	if ( enabledForNetif ) return kIOReturnSuccess;

	enabledForNetif = setActivationLevel( kActivationLevel2 );

	return ( enabledForNetif ? kIOReturnSuccess : kIOReturnIOError );
}

//---------------------------------------------------------------------------
// Function: disable <IONetworkController>
//
// A request from our interface client to disable the adapter.

IOReturn Intel82557::disable(IONetworkInterface * /*netif*/)
{
	enabledForNetif = false;

    setActivationLevel( enabledForDebugger ?
                        kActivationLevel1 : kActivationLevel0 );

	return kIOReturnSuccess;
}

//---------------------------------------------------------------------------
// Function: enable <IONetworkController>
//
// A request from our debugger client to enable the adapter.

IOReturn Intel82557::enable(IOKernelDebugger * /*debugger*/)
{
	if ( enabledForDebugger || enabledForNetif )
    {
		enabledForDebugger = true;
		return kIOReturnSuccess;
	}

	enabledForDebugger = setActivationLevel( kActivationLevel1 );

	return ( enabledForDebugger ? kIOReturnSuccess : kIOReturnIOError );
}

//---------------------------------------------------------------------------
// Function: disable <IONetworkController>
//
// A request from our debugger client to disable the adapter.

IOReturn Intel82557::disable(IOKernelDebugger * /*debugger*/)
{
	enabledForDebugger = false;

	if ( enabledForNetif == false )
		setActivationLevel( kActivationLevel0 );

	return kIOReturnSuccess;
}

//---------------------------------------------------------------------------
// Function: timeoutOccurred
//
// Periodic timer that monitors the receiver status, updates error
// and collision statistics, and update the current link status.

void Intel82557::timeoutOccurred(IOTimerEventSource * /*timer*/)
{
	if ( (packetsReceived == false) && (packetsTransmitted == true) )
    {
		/*
		 * The B-step of the i82557 requires that an mcsetup command be
		 * issued if the receiver stops receiving.  This is a documented
		 * errata.
		 */
		mcSetup(0, 0, true);
	}
	packetsReceived = packetsTransmitted = false;

	_updateStatistics();

    _phyReportLinkStatus();

	timerSrc->setTimeoutMS(LOAD_STATISTICS_INTERVAL);
}

//---------------------------------------------------------------------------
// Function: setPromiscuousMode <IOEthernetController>

IOReturn Intel82557::setPromiscuousMode( bool active )
{
    bool rv;
	promiscuousEnabled = active;
	reserveDebuggerLock();
	rv = config();
	releaseDebuggerLock();
    return (rv ? kIOReturnSuccess : kIOReturnIOError);
}

//---------------------------------------------------------------------------
// Function: setMulticastMode <IOEthernetController>

IOReturn Intel82557::setMulticastMode( bool active )
{
	multicastEnabled = active;
	return kIOReturnSuccess;
}

//---------------------------------------------------------------------------
// Function: setMulticastList <IOEthernetController>

IOReturn Intel82557::setMulticastList(IOEthernetAddress * addrs, UInt32 count)
{
	IOReturn ret = kIOReturnSuccess;

    if ( mcSetup(addrs, count) == false )
    {
    	VPRINT("%s: set multicast list failed\n", getName());
		ret = kIOReturnIOError;
	}
	return ret;
}

//---------------------------------------------------------------------------
// Function: getPacketBufferConstraints <IONetworkController>
//
// Return our driver's packet alignment requirements.

void
Intel82557::getPacketBufferConstraints(IOPacketBufferConstraints * constraints) const
{
	constraints->alignStart  = kIOPacketBufferAlign2;	// even word aligned.
	constraints->alignLength = kIOPacketBufferAlign1;	// no restriction.
}

//---------------------------------------------------------------------------
// Function: getHardwareAddress <IOEthernetController>
//
// Return the adapter's hardware/Ethernet address.

IOReturn Intel82557::getHardwareAddress(IOEthernetAddress * addrs)
{
	bcopy(&myAddress, addrs, sizeof(*addrs));
	return kIOReturnSuccess;
}

//---------------------------------------------------------------------------
// Function: createOutputQueue <IONetworkController>
//
// Allocate an IOGatedOutputQueue instance.

IOOutputQueue * Intel82557::createOutputQueue()
{	
	return IOGatedOutputQueue::withTarget(this, getWorkLoop());
}

//---------------------------------------------------------------------------
// Function: selectMedium <IONetworkController>
//
// Transition the controller/PHY to use a new medium. Note that
// this function can be called my the driver, or by our client.

IOReturn Intel82557::selectMedium(const IONetworkMedium * medium)
{
	bool  r;

	if ( OSDynamicCast(IONetworkMedium, medium) == 0 )
    {
        // Defaults to Auto.
        medium = _phyGetMediumWithType( MEDIUM_TYPE_AUTO );
        if ( medium == 0 ) return kIOReturnError;
    }

#if 0
	IOLog("%s: selectMedium -> %s\n", getName(),
          medium->getName()->getCStringNoCopy());
#endif

	// Program PHY to select the desired medium.
	//
	r = _phySetMedium( (mediumType_t) medium->getIndex() );

	// Update the current medium property.
	//
	if ( r && !setCurrentMedium(medium) )
		VPRINT("%s: setCurrentMedium error\n", getName());

	return ( r ? kIOReturnSuccess : kIOReturnIOError );
}

//---------------------------------------------------------------------------
// Function: newVendorString(), newModelString()
//           <IONetworkController>
//
// Report human readable hardware information strings.

const OSString * Intel82557::newVendorString() const
{
	return OSString::withCString("Intel");
}

const OSString * Intel82557::newModelString() const
{
	const char * model = 0;

	assert( eeprom && eeprom->getContents() );

	switch ( eeprom->getContents()->controllerType )
    {
		case I82558_CONTROLLER_TYPE:
			model = "82558";
			break;
		case I82557_CONTROLLER_TYPE:
		default:
			model = "82557";
			break;
	}
	return OSString::withCString(model);
}

//---------------------------------------------------------------------------
// Kernel debugger entry points.
//
// KDP driven polling routines to send and transmit a frame.
// Remember, no memory allocation! Not even mbufs are safe.

void Intel82557::sendPacket(void * pkt, UInt32 pkt_len)
{
	_sendPacket(pkt, pkt_len);
}

void Intel82557::receivePacket(void * pkt, UInt32 * pkt_len, UInt32 timeout)
{
	_receivePacket(pkt, (UInt *) pkt_len, timeout);
}