void IORecursiveLockLock( IORecursiveLock * _lock)
{
_IORecursiveLock * lock = (_IORecursiveLock *)_lock;
if( lock->thread == IOThreadSelf())
lock->count++;
else {
mutex_lock( lock->mutex );
assert( lock->thread == 0 );
assert( lock->count == 0 );
lock->thread = IOThreadSelf();
lock->count = 1;
}
}
boolean_t IORecursiveLockTryLock( IORecursiveLock * _lock)
{
_IORecursiveLock * lock = (_IORecursiveLock *)_lock;
if( lock->thread == IOThreadSelf()) {
lock->count++;
return( true );
} else {
if( mutex_try( lock->mutex )) {
assert( lock->thread == 0 );
assert( lock->count == 0 );
lock->thread = IOThreadSelf();
lock->count = 1;
return( true );
}
}
return( false );
}
unsigned long UniNEnet::powerStateForDomainState(IOPMPowerFlags domainState )
{
ELG( IOThreadSelf(), domainState, 'ps4d', "UniNEnet::powerStateForDomainState" );
if ( domainState & IOPMPowerOn )
return 1; // This should answer What If?
return 0;
}/* end powerStateForDomainState */
unsigned long UniNEnet::maxCapabilityForDomainState( IOPMPowerFlags domainState )
{
ELG( IOThreadSelf(), domainState, 'mx4d', "maxCapabilityForDomainState" );
if ( domainState & IOPMPowerOn )
return kNumOfPowerStates - 1;
return 0;
}/* end maxCapabilityForDomainState */
unsigned long UniNEnet::initialPowerStateForDomainState( IOPMPowerFlags domainState )
{
ELG( IOThreadSelf(), domainState, 'ip4d', "initialPowerStateForDomainState" );
if ( domainState & IOPMPowerOn )
return kNumOfPowerStates - 1;
return 0;
}/* end initialPowerStateForDomainState */
void IORecursiveLockUnlock( IORecursiveLock * _lock)
{
_IORecursiveLock * lock = (_IORecursiveLock *)_lock;
assert( lock->thread == IOThreadSelf() );
if( 0 == (--lock->count)) {
lock->thread = 0;
mutex_unlock( lock->mutex );
}
}
int IORecursiveLockSleep(IORecursiveLock *_lock, void *event, UInt32 interType)
{
_IORecursiveLock * lock = (_IORecursiveLock *)_lock;
UInt32 count = lock->count;
int res;
assert(lock->thread == IOThreadSelf());
assert(lock->count == 1 || interType == THREAD_UNINT);
lock->count = 0;
lock->thread = 0;
res = thread_sleep_mutex((event_t) event, lock->mutex, (int) interType);
// Must re-establish the recursive lock no matter why we woke up
// otherwise we would potentially leave the return path corrupted.
assert(lock->thread == 0);
assert(lock->count == 0);
lock->thread = IOThreadSelf();
lock->count = count;
return res;
}
IOReturn UniNEnet::registerWithPolicyMaker( IOService *policyMaker )
{
IOReturn rc;
if ( fBuiltin )
rc = policyMaker->registerPowerDriver( this, ourPowerStates, kNumOfPowerStates );
else rc = super::registerWithPolicyMaker( policyMaker ); // return unsupported
ELG( IOThreadSelf(), rc, 'RwPM', "registerWithPolicyMaker" );
return rc;
}/* end registerWithPolicyMaker */
bool IOFWWorkLoop::tryCloseGate()
{
bool ret;
ret = IOWorkLoop::tryCloseGate();
if( ret &&
fSleepToken &&
(fRemoveSourceThread != IOThreadSelf()) )
{
openGate();
ret = false;
}
return ret;
}
IOReturn IOFWWorkLoop::removeEventSource(IOEventSource *toRemove)
{
IOReturn status = kIOReturnSuccess;
// the PM thread retains ioservices while fiddling with them
// that means the PM thread may be the thread that releases the final retain on an ioservices
// ioservices may remove and free event sources in their free routines
// removing and freeing event sources grabs the workloop lock
// if the PM has already put FireWire to sleep we would sleep any thread who grabs the workloop lock
// if we sleep the PM thread then sleep hangs. that's bad.
// if we could have a do over we should not sleep the entire workloop, but only those that belong
// to the core FireWire services. at this point though there are likely too many drivers relying
// on a full workloop sleep to change things safely.
// so for now we do these slightly crazy machinations to allow event source removal without sleeping the
// calling thread
// we only need to do this if the calling thread is the PM workloop, but I don't want to make
// assumptions about PM internals that may change so I'll do this for all threads
IOWorkLoop::closeGate();
if( fRemoveSourceThread != NULL )
{
IOLog( "IOFWWorkLoop::removeEventSource - fRemoveSourceThread = (%p) != NULL\n", fRemoveSourceThread );
}
// remember who's removing the event source
fRemoveSourceThread = IOThreadSelf();
// if we're asleep
if( fSleepToken )
{
// we can't let this object be freed after we return since freeing a command gate grabs the workloop lock
// we will flush this set on wake
fRemoveSourceDeferredSet->setObject( toRemove );
}
// do the actual removal, this will succeed since fRemoveSourceThread will be allowed to grab the lock
status = IOWorkLoop::removeEventSource( toRemove );
// forget the thread
fRemoveSourceThread = NULL;
IOWorkLoop::openGate();
return status;
}
void IOFWWorkLoop::closeGate()
{
IOWorkLoop::closeGate();
if( fSleepToken &&
(fRemoveSourceThread != IOThreadSelf()) )
{
IOReturn res;
do
{
res = sleepGate( fSleepToken, THREAD_ABORTSAFE );
if( res == kIOReturnSuccess )
break;
IOLog("sleepGate returned 0x%x\n", res);
}
while( true );
}
}
bool IOWorkLoop::onThread() const
{
return (IOThreadSelf() == workThread);
}
bool RTL8139::start( IOService *provider )
{
OSObject *builtinProperty;
bool success = false;
ELG( IOThreadSelf(), provider, 'Strt', "RTL8139::start - this, provider." );
DEBUG_LOG( "start() ===>\n" );
do
{
if ( false == super::start( provider ) ) // Start our superclass first
break;
// Save a reference to our provider.
pciNub = OSDynamicCast( IOPCIDevice, provider );
if ( 0 == pciNub )
break;
pciNub->retain(); // Retain provider, released in free().
if ( false == pciNub->open( this ) ) // Open our provider.
break;
fBuiltin = false;
builtinProperty = provider->getProperty( "built-in" );
if ( builtinProperty )
{
fBuiltin = true;
ELG( 0, 0, 'b-in', "RTL8139::start - found built-in property." );
}
if ( false == initEventSources( provider ) )
break;
// Allocate memory for descriptors. This function will leak memory
// if called more than once. So don't do it.
if ( false == allocateDescriptorMemory() )
break;
// Get the virtual address mapping of CSR registers located at
// Base Address Range 0 (0x10).
csrMap = pciNub->mapDeviceMemoryWithRegister( kIOPCIConfigBaseAddress1 );
if ( 0 == csrMap )
break;
csrBase = (volatile void*)csrMap->getVirtualAddress();
// Init PCI config space:
if ( false == initPCIConfigSpace( pciNub ) )
break;
// Reset chip to bring it to a known state.
if ( initAdapter( kResetChip ) == false )
{
IOLog( "%s: initAdapter() failed\n", getName() );
break;
}
registerEEPROM();
// Publish our media capabilities:
phyProbeMediaCapability();
if ( false == publishMediumDictionary( mediumDict ) )
break;
success = true;
} while ( false );
// Close our provider, it will be re-opened on demand when
// our enable() is called by a client.
if ( pciNub )
pciNub->close( this );
do
{
if ( false == success )
break;
success = false;
// Allocate and attach an IOEthernetInterface instance.
if ( false == attachInterface( (IONetworkInterface**)&netif, false) )
break;
// Optional: this driver supports kernel debugging.
attachDebuggerClient( &debugger );
// Trigger matching for clients of netif.
netif->registerService();
success = true;
}
while ( false );
DEBUG_LOG( "start() <===\n" );
return success;
}/* end start */
boolean_t IORecursiveLockHaveLock( const IORecursiveLock * _lock)
{
_IORecursiveLock * lock = (_IORecursiveLock *)_lock;
return( lock->thread == IOThreadSelf());
}