This class handles reads from the system/host memory space from the shader. More...

#include <system_hub.hh>

Inheritance diagram for gem5::AMDGPUSystemHub:

Classes
class	AtomicResponseEvent

class	ResponseEvent

Public Member Functions
	AMDGPUSystemHub (const AMDGPUSystemHubParams &p)

void	sendRequest (PacketPtr pkt, Event *callback)

void	dmaResponse (PacketPtr pkt)

Tick	write (PacketPtr pkt) override
	Inherited methods.

Tick	read (PacketPtr pkt) override
	Pure virtual function that the device must implement.

AddrRangeList	getAddrRanges () const override
	Every PIO device is obliged to provide an implementation that returns the address ranges the device responds to.

Public Member Functions inherited from gem5::DmaDevice
	DmaDevice (const Params &p)

virtual	~DmaDevice ()=default

void	dmaWrite (Addr addr, int size, Event event, uint8_t data, uint32_t sid, uint32_t ssid, Tick delay=0)

void	dmaWrite (Addr addr, int size, Event event, uint8_t data, Tick delay=0)

void	dmaRead (Addr addr, int size, Event event, uint8_t data, uint32_t sid, uint32_t ssid, Tick delay=0)

void	dmaRead (Addr addr, int size, Event event, uint8_t data, Tick delay=0)

bool	dmaPending () const

void	init () override
	init() is called after all C++ SimObjects have been created and all ports are connected.

Addr	cacheBlockSize () const

Port &	getPort (const std::string &if_name, PortID idx=InvalidPortID) override
	Get a port with a given name and index.

Public Member Functions inherited from gem5::PioDevice
	PioDevice (const Params &p)

virtual	~PioDevice ()

void	init () override
	init() is called after all C++ SimObjects have been created and all ports are connected.

Port &	getPort (const std::string &if_name, PortID idx=InvalidPortID) override
	Get a port with a given name and index.

Public Member Functions inherited from gem5::ClockedObject
	ClockedObject (const ClockedObjectParams &p)

void	serialize (CheckpointOut &cp) const override
	Serialize an object.

void	unserialize (CheckpointIn &cp) override
	Unserialize an object.

Public Member Functions inherited from gem5::SimObject
const Params &	params () const

	SimObject (const Params &p)

virtual	~SimObject ()

virtual void	loadState (CheckpointIn &cp)
	loadState() is called on each SimObject when restoring from a checkpoint.

virtual void	initState ()
	initState() is called on each SimObject when not restoring from a checkpoint.

virtual void	regProbePoints ()
	Register probe points for this object.

virtual void	regProbeListeners ()
	Register probe listeners for this object.

ProbeManager *	getProbeManager ()
	Get the probe manager for this object.

virtual void	startup ()
	startup() is the final initialization call before simulation.

DrainState	drain () override
	Provide a default implementation of the drain interface for objects that don't need draining.

virtual void	memWriteback ()
	Write back dirty buffers to memory using functional writes.

virtual void	memInvalidate ()
	Invalidate the contents of memory buffers.

void	serialize (CheckpointOut &cp) const override
	Serialize an object.

void	unserialize (CheckpointIn &cp) override
	Unserialize an object.

Public Member Functions inherited from gem5::EventManager
EventQueue *	eventQueue () const

void	schedule (Event &event, Tick when)

void	deschedule (Event &event)

void	reschedule (Event &event, Tick when, bool always=false)

void	schedule (Event *event, Tick when)

void	deschedule (Event *event)

void	reschedule (Event *event, Tick when, bool always=false)

void	wakeupEventQueue (Tick when=(Tick) -1)
	This function is not needed by the usual gem5 event loop but may be necessary in derived EventQueues which host gem5 on other schedulers.

void	setCurTick (Tick newVal)

	EventManager (EventManager &em)
	Event manger manages events in the event queue.

	EventManager (EventManager *em)

	EventManager (EventQueue *eq)

Public Member Functions inherited from gem5::Serializable
	Serializable ()

virtual	~Serializable ()

void	serializeSection (CheckpointOut &cp, const char *name) const
	Serialize an object into a new section.

void	serializeSection (CheckpointOut &cp, const std::string &name) const

void	unserializeSection (CheckpointIn &cp, const char *name)
	Unserialize an a child object.

void	unserializeSection (CheckpointIn &cp, const std::string &name)

Public Member Functions inherited from gem5::Drainable
DrainState	drainState () const
	Return the current drain state of an object.

virtual void	notifyFork ()
	Notify a child process of a fork.

Public Member Functions inherited from gem5::statistics::Group
	Group (Group parent, const char name=nullptr)
	Construct a new statistics group.

virtual	~Group ()

virtual void	regStats ()
	Callback to set stat parameters.

virtual void	resetStats ()
	Callback to reset stats.

virtual void	preDumpStats ()
	Callback before stats are dumped.

void	addStat (statistics::Info *info)
	Register a stat with this group.

const std::map< std::string, Group * > &	getStatGroups () const
	Get all child groups associated with this object.

const std::vector< Info * > &	getStats () const
	Get all stats associated with this object.

void	addStatGroup (const char name, Group block)
	Add a stat block as a child of this block.

const Info *	resolveStat (std::string name) const
	Resolve a stat by its name within this group.

void	mergeStatGroup (Group *block)
	Merge the contents (stats & children) of a block to this block.

	Group ()=delete

	Group (const Group &)=delete

Group &	operator= (const Group &)=delete

Public Member Functions inherited from gem5::Named
	Named (const std::string &name_)

virtual	~Named ()=default

virtual std::string	name () const

Public Member Functions inherited from gem5::Clocked
void	updateClockPeriod ()
	Update the tick to the current tick.

Tick	clockEdge (Cycles cycles=Cycles(0)) const
	Determine the tick when a cycle begins, by default the current one, but the argument also enables the caller to determine a future cycle.

Cycles	curCycle () const
	Determine the current cycle, corresponding to a tick aligned to a clock edge.

Tick	nextCycle () const
	Based on the clock of the object, determine the start tick of the first cycle that is at least one cycle in the future.

uint64_t	frequency () const

Tick	clockPeriod () const

double	voltage () const

Cycles	ticksToCycles (Tick t) const

Tick	cyclesToTicks (Cycles c) const

Private Types
typedef std::pair< PacketPtr, Event * >	DeferredReq

typedef std::list< DeferredReq >	DeferredReqList

Private Member Functions
void	sendNextRequest (Addr addr, const PacketPtr donePkt)

void	sendDeferredRequest (DeferredReq &deferredReq)

Private Attributes
std::unordered_map< Addr, DeferredReqList >	outstandingReqs

Additional Inherited Members
Public Types inherited from gem5::DmaDevice
typedef DmaDeviceParams	Params

Public Types inherited from gem5::PioDevice
using	Params = PioDeviceParams

Public Types inherited from gem5::ClockedObject
using	Params = ClockedObjectParams
	Parameters of ClockedObject.

Public Types inherited from gem5::SimObject
typedef SimObjectParams	Params

Static Public Member Functions inherited from gem5::SimObject
static void	serializeAll (const std::string &cpt_dir)
	Create a checkpoint by serializing all SimObjects in the system.

static SimObject *	find (const char *name)
	Find the SimObject with the given name and return a pointer to it.

static void	setSimObjectResolver (SimObjectResolver *resolver)
	There is a single object name resolver, and it is only set when simulation is restoring from checkpoints.

static SimObjectResolver *	getSimObjectResolver ()
	There is a single object name resolver, and it is only set when simulation is restoring from checkpoints.

Static Public Member Functions inherited from gem5::Serializable
static const std::string &	currentSection ()
	Gets the fully-qualified name of the active section.

static void	generateCheckpointOut (const std::string &cpt_dir, std::ofstream &outstream)
	Generate a checkpoint file so that the serialization can be routed to it.

Public Attributes inherited from gem5::ClockedObject
PowerState *	powerState

Protected Member Functions inherited from gem5::Drainable
	Drainable ()

virtual	~Drainable ()

virtual void	drainResume ()
	Resume execution after a successful drain.

void	signalDrainDone () const
	Signal that an object is drained.

Protected Member Functions inherited from gem5::Clocked
	Clocked (ClockDomain &clk_domain)
	Create a clocked object and set the clock domain based on the parameters.

	Clocked (Clocked &)=delete

Clocked &	operator= (Clocked &)=delete

virtual	~Clocked ()
	Virtual destructor due to inheritance.

void	resetClock () const
	Reset the object's clock using the current global tick value.

virtual void	clockPeriodUpdated ()
	A hook subclasses can implement so they can do any extra work that's needed when the clock rate is changed.

Protected Attributes inherited from gem5::DmaDevice
DmaPort	dmaPort

Protected Attributes inherited from gem5::PioDevice
System *	sys

PioPort< PioDevice >	pioPort
	The pioPort that handles the requests for us and provides us requests that it sees.

Protected Attributes inherited from gem5::SimObject
const SimObjectParams &	_params
	Cached copy of the object parameters.

Protected Attributes inherited from gem5::EventManager
EventQueue *	eventq
	A pointer to this object's event queue.

Detailed Description

This class handles reads from the system/host memory space from the shader.

It is meant to handle requests to memory which translation to system addresses. This can occur in fetch, scalar read/write, or vector memory read/write. It is a very basic interface to convert read packets to DMA requests and respond to the caller using an event.

Definition at line 50 of file system_hub.hh.

Member Typedef Documentation

◆ DeferredReq

typedef std::pair<PacketPtr, Event*> gem5::AMDGPUSystemHub::DeferredReq

private

Definition at line 66 of file system_hub.hh.

◆ DeferredReqList

typedef std::list<DeferredReq> gem5::AMDGPUSystemHub::DeferredReqList

private

Definition at line 67 of file system_hub.hh.

Constructor & Destructor Documentation

◆ AMDGPUSystemHub()

gem5::AMDGPUSystemHub::AMDGPUSystemHub ( const AMDGPUSystemHubParams & p )

inline

Definition at line 53 of file system_hub.hh.

Member Function Documentation

◆ dmaResponse()

void gem5::AMDGPUSystemHub::dmaResponse ( PacketPtr pkt )

Definition at line 134 of file system_hub.cc.

◆ getAddrRanges()

AddrRangeList gem5::AMDGPUSystemHub::getAddrRanges ( ) const

overridevirtual

Every PIO device is obliged to provide an implementation that returns the address ranges the device responds to.

Returns: a list of non-overlapping address ranges

Implements gem5::PioDevice.

Definition at line 206 of file system_hub.cc.

◆ read()

Tick gem5::AMDGPUSystemHub::read ( PacketPtr pkt )

inlineoverridevirtual

Pure virtual function that the device must implement.

Called when a read command is recieved by the port.

Parameters

pkt	Packet describing this request

Returns: number of ticks it took to complete

Implements gem5::PioDevice.

Definition at line 62 of file system_hub.hh.

◆ sendDeferredRequest()

void gem5::AMDGPUSystemHub::sendDeferredRequest ( DeferredReq & deferredReq )

private

Definition at line 63 of file system_hub.cc.

References gem5::DmaDevice::dmaRead(), gem5::DmaDevice::dmaWrite(), DPRINTF, gem5::Packet::getAddr(), gem5::Packet::getPtr(), gem5::Packet::getSize(), gem5::Packet::isAtomicOp(), gem5::Packet::isRead(), and gem5::Packet::isWrite().

Referenced by sendNextRequest(), and sendRequest().

◆ sendNextRequest()

void gem5::AMDGPUSystemHub::sendNextRequest	(	Addr	addr,
		const PacketPtr	donePkt )

private

Definition at line 105 of file system_hub.cc.

References gem5::X86ISA::addr, DPRINTF, gem5::Packet::getAddr(), outstandingReqs, and sendDeferredRequest().

◆ sendRequest()

void gem5::AMDGPUSystemHub::sendRequest	(	PacketPtr	pkt,
		Event *	callback )

Definition at line 42 of file system_hub.cc.

References DPRINTF, gem5::Packet::getAddr(), outstandingReqs, and sendDeferredRequest().

Referenced by gem5::FetchUnit::fetch(), gem5::ComputeUnit::ScalarDataPort::MemReqEvent::process(), and gem5::ComputeUnit::DataPort::processMemReqEvent().

◆ write()

Tick gem5::AMDGPUSystemHub::write ( PacketPtr pkt )

inlineoverridevirtual

Inherited methods.

Implements gem5::PioDevice.

Definition at line 61 of file system_hub.hh.

Member Data Documentation

◆ outstandingReqs

std::unordered_map<Addr, DeferredReqList> gem5::AMDGPUSystemHub::outstandingReqs

private

Definition at line 68 of file system_hub.hh.

Referenced by sendNextRequest(), and sendRequest().

The documentation for this class was generated from the following files:

dev/amdgpu/system_hub.hh
dev/amdgpu/system_hub.cc

Classes

Public Member Functions

Private Types

Private Member Functions

Private Attributes

Additional Inherited Members

Detailed Description

Member Typedef Documentation

◆ DeferredReq

◆ DeferredReqList

Constructor & Destructor Documentation

◆ AMDGPUSystemHub()

Member Function Documentation

◆ dmaResponse()

◆ getAddrRanges()

◆ read()

◆ sendDeferredRequest()

◆ sendNextRequest()

◆ sendRequest()

◆ write()

Member Data Documentation

◆ outstandingReqs