the port intended to communicate between the CU and its LDS More...

#include <compute_unit.hh>

Inheritance diagram for gem5::ComputeUnit::LDSPort:

Classes
class	SenderState
	SenderState is information carried along with the packet, esp. More...

Public Member Functions
	LDSPort (const std::string &_name, ComputeUnit *_cu)

bool	isStalled () const

void	stallPort ()

void	unstallPort ()

virtual bool	sendTimingReq (PacketPtr pkt)
	attempt to send this packet, either the port is already stalled, the request is nack'd and must stall or the request goes through when a request cannot be sent, add it to the retries queue

Public Member Functions inherited from gem5::RequestPort
	RequestPort (const std::string &name, SimObject *_owner, PortID id=InvalidPortID)
	Request port.

	RequestPort (const std::string &name, PortID id=InvalidPortID)

virtual	~RequestPort ()

void	bind (Port &peer) override
	Bind this request port to a response port.

void	unbind () override
	Unbind this request port and the associated response port.

virtual bool	isSnooping () const
	Determine if this request port is snooping or not.

AddrRangeList	getAddrRanges () const
	Get the address ranges of the connected responder port.

void	printAddr (Addr a)
	Inject a PrintReq for the given address to print the state of that address throughout the memory system.

Tick	sendAtomic (PacketPtr pkt)
	Send an atomic request packet, where the data is moved and the state is updated in zero time, without interleaving with other memory accesses.

Tick	sendAtomicBackdoor (PacketPtr pkt, MemBackdoorPtr &backdoor)
	Send an atomic request packet like above, but also request a backdoor to the data being accessed.

void	sendFunctional (PacketPtr pkt) const
	Send a functional request packet, where the data is instantly updated everywhere in the memory system, without affecting the current state of any block or moving the block.

void	sendMemBackdoorReq (const MemBackdoorReq &req, MemBackdoorPtr &backdoor)
	Send a request for a back door to a range of memory.

bool	sendTimingReq (PacketPtr pkt)
	Attempt to send a timing request to the responder port by calling its corresponding receive function.

bool	tryTiming (PacketPtr pkt) const
	Check if the responder can handle a timing request.

bool	sendTimingSnoopResp (PacketPtr pkt)
	Attempt to send a timing snoop response packet to the response port by calling its corresponding receive function.

virtual void	sendRetryResp ()
	Send a retry to the response port that previously attempted a sendTimingResp to this request port and failed.

Public Member Functions inherited from gem5::Port
virtual	~Port ()
	Virtual destructor due to inheritance.

Port &	getPeer ()
	Return a reference to this port's peer.

const std::string	name () const
	Return port name (for DPRINTF).

PortID	getId () const
	Get the port id.

bool	isConnected () const
	Is this port currently connected to a peer?

void	takeOverFrom (Port *old)
	A utility function to make it easier to swap out ports.

Public Attributes
std::queue< PacketPtr >	retries
	here we queue all the requests that were not successfully sent.

Protected Member Functions
virtual bool	recvTimingResp (PacketPtr pkt)
	get the result of packets sent to the LDS when they return

virtual Tick	recvAtomic (PacketPtr pkt)

virtual void	recvFunctional (PacketPtr pkt)

virtual void	recvRangeChange ()
	Called to receive an address range change from the peer response port.

virtual void	recvReqRetry ()
	the bus is telling the port that there is now space so retrying stalled requests should work now this allows the port to have a request be nack'd and then have the receiver say when there is space, rather than simply retrying the send every cycle

Protected Member Functions inherited from gem5::RequestPort
Tick	recvAtomicSnoop (PacketPtr pkt) override
	Default implementations.

void	recvFunctionalSnoop (PacketPtr pkt) override
	Receive a functional snoop request packet from the peer.

void	recvTimingSnoopReq (PacketPtr pkt) override
	Receive a timing snoop request from the peer.

void	recvRetrySnoopResp () override
	Called by the peer if sendTimingSnoopResp was called on this protocol (causing recvTimingSnoopResp to be called on the peer) and was unsuccessful.

Protected Member Functions inherited from gem5::Port
void	reportUnbound () const

	Port (const std::string &_name, PortID _id)
	Abstract base class for ports.

Protected Member Functions inherited from gem5::AtomicRequestProtocol
Tick	send (AtomicResponseProtocol *peer, PacketPtr pkt)
	Send an atomic request packet, where the data is moved and the state is updated in zero time, without interleaving with other memory accesses.

Tick	sendBackdoor (AtomicResponseProtocol *peer, PacketPtr pkt, MemBackdoorPtr &backdoor)
	Send an atomic request packet like above, but also request a backdoor to the data being accessed.

Protected Member Functions inherited from gem5::TimingRequestProtocol
bool	sendReq (TimingResponseProtocol *peer, PacketPtr pkt)
	Attempt to send a timing request to the peer by calling its corresponding receive function.

bool	trySend (TimingResponseProtocol *peer, PacketPtr pkt) const
	Check if the peer can handle a timing request.

bool	sendSnoopResp (TimingResponseProtocol *peer, PacketPtr pkt)
	Attempt to send a timing snoop response packet to it's peer by calling its corresponding receive function.

void	sendRetryResp (TimingResponseProtocol *peer)
	Send a retry to the peer that previously attempted a sendTimingResp to this protocol and failed.

Protected Member Functions inherited from gem5::FunctionalRequestProtocol
void	send (FunctionalResponseProtocol *peer, PacketPtr pkt) const
	Send a functional request packet, where the data is instantly updated everywhere in the memory system, without affecting the current state of any block or moving the block.

void	sendMemBackdoorReq (FunctionalResponseProtocol *peer, const MemBackdoorReq &req, MemBackdoorPtr &backdoor)
	Send a request for a back door to a range of memory.

Protected Attributes
bool	stalled = false
	whether or not it is stalled

ComputeUnit *	computeUnit

Protected Attributes inherited from gem5::RequestPort
SimObject &	owner

Protected Attributes inherited from gem5::Port
const PortID	id
	A numeric identifier to distinguish ports in a vector, and set to InvalidPortID in case this port is not part of a vector.

Port *	_peer
	A pointer to this port's peer.

bool	_connected
	Whether this port is currently connected to a peer port.

Detailed Description

the port intended to communicate between the CU and its LDS

Definition at line 847 of file compute_unit.hh.

Constructor & Destructor Documentation

◆ LDSPort()

gem5::ComputeUnit::LDSPort::LDSPort	(	const std::string &	_name,
		ComputeUnit *	_cu )

inline

Definition at line 850 of file compute_unit.hh.

Member Function Documentation

◆ isStalled()

bool gem5::ComputeUnit::LDSPort::isStalled ( ) const

inline

Definition at line 855 of file compute_unit.hh.

References stalled.

◆ recvAtomic()

virtual Tick gem5::ComputeUnit::LDSPort::recvAtomic ( PacketPtr pkt )

inlineprotectedvirtual

Definition at line 901 of file compute_unit.hh.

◆ recvFunctional()

virtual void gem5::ComputeUnit::LDSPort::recvFunctional ( PacketPtr pkt )

inlineprotectedvirtual

Definition at line 904 of file compute_unit.hh.

◆ recvRangeChange()

virtual void gem5::ComputeUnit::LDSPort::recvRangeChange ( )

inlineprotectedvirtual

Called to receive an address range change from the peer response port.

The default implementation ignores the change and does nothing. Override this function in a derived class if the owner needs to be aware of the address ranges, e.g. in an interconnect component like a bus.

Reimplemented from gem5::RequestPort.

Definition at line 909 of file compute_unit.hh.

◆ recvReqRetry()

void gem5::ComputeUnit::LDSPort::recvReqRetry ( )

protectedvirtual

the bus is telling the port that there is now space so retrying stalled requests should work now this allows the port to have a request be nack'd and then have the receiver say when there is space, rather than simply retrying the send every cycle

Implements gem5::TimingRequestProtocol.

Definition at line 2280 of file compute_unit.cc.

References DPRINTF, fatal_if, and gem5::RequestPort::sendTimingReq().

◆ recvTimingResp()

bool gem5::ComputeUnit::LDSPort::recvTimingResp ( PacketPtr pkt )

protectedvirtual

get the result of packets sent to the LDS when they return

Implements gem5::TimingRequestProtocol.

Definition at line 2216 of file compute_unit.cc.

References fatal_if, gem5::ComputeUnit::LDSPort::SenderState::getMemInst(), and gem5::Packet::senderState.

◆ sendTimingReq()

bool gem5::ComputeUnit::LDSPort::sendTimingReq ( PacketPtr pkt )

virtual

attempt to send this packet, either the port is already stalled, the request is nack'd and must stall or the request goes through when a request cannot be sent, add it to the retries queue

Definition at line 2238 of file compute_unit.cc.

References DPRINTF, fatal_if, gem5::ComputeUnit::LDSPort::SenderState::getMemInst(), gem5::Packet::req, gem5::Packet::senderState, and gem5::RequestPort::sendTimingReq().

Referenced by gem5::ComputeUnit::sendToLds().

◆ stallPort()

void gem5::ComputeUnit::LDSPort::stallPort ( )

inline

Definition at line 856 of file compute_unit.hh.

References stalled.

◆ unstallPort()

void gem5::ComputeUnit::LDSPort::unstallPort ( )

inline

Definition at line 857 of file compute_unit.hh.

References stalled.

Member Data Documentation

◆ computeUnit

ComputeUnit* gem5::ComputeUnit::LDSPort::computeUnit

protected

Definition at line 895 of file compute_unit.hh.

◆ retries

std::queue<PacketPtr> gem5::ComputeUnit::LDSPort::retries

here we queue all the requests that were not successfully sent.

Definition at line 863 of file compute_unit.hh.

◆ stalled

bool gem5::ComputeUnit::LDSPort::stalled = false

protected

whether or not it is stalled

Definition at line 893 of file compute_unit.hh.

Referenced by isStalled(), stallPort(), and unstallPort().

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

gpu-compute/compute_unit.hh
gpu-compute/compute_unit.cc

Classes

Public Member Functions

Public Attributes

Protected Member Functions

Protected Attributes

Detailed Description

Constructor & Destructor Documentation

◆ LDSPort()

Member Function Documentation

◆ isStalled()

◆ recvAtomic()

◆ recvFunctional()

◆ recvRangeChange()

◆ recvReqRetry()

◆ recvTimingResp()

◆ sendTimingReq()

◆ stallPort()

◆ unstallPort()

Member Data Documentation

◆ computeUnit

◆ retries

◆ stalled