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/*
* Copyright (c) 2020 Inria
* Copyright (c) 2016 Georgia Institute of Technology
* Copyright (c) 2008 Princeton University
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met: redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer;
* redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution;
* neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef __MEM_RUBY_NETWORK_GARNET_0_INPUTUNIT_HH__
#define __MEM_RUBY_NETWORK_GARNET_0_INPUTUNIT_HH__
#include <iostream>
#include <vector>
#include "mem/ruby/common/Consumer.hh"
#include "mem/ruby/network/garnet/CommonTypes.hh"
#include "mem/ruby/network/garnet/CreditLink.hh"
#include "mem/ruby/network/garnet/NetworkLink.hh"
#include "mem/ruby/network/garnet/Router.hh"
#include "mem/ruby/network/garnet/VirtualChannel.hh"
#include "mem/ruby/network/garnet/flitBuffer.hh"
class InputUnit : public Consumer
{
public:
InputUnit(int id, PortDirection direction, Router *router);
~InputUnit() = default;
void wakeup();
void print(std::ostream& out) const {};
inline PortDirection get_direction() { return m_direction; }
inline void
set_vc_idle(int vc, Tick curTime)
{
virtualChannels[vc].set_idle(curTime);
}
inline void
set_vc_active(int vc, Tick curTime)
{
virtualChannels[vc].set_active(curTime);
}
inline void
grant_outport(int vc, int outport)
{
virtualChannels[vc].set_outport(outport);
}
inline void
grant_outvc(int vc, int outvc)
{
virtualChannels[vc].set_outvc(outvc);
}
inline int
get_outport(int invc)
{
return virtualChannels[invc].get_outport();
}
inline int
get_outvc(int invc)
{
return virtualChannels[invc].get_outvc();
}
inline Tick
get_enqueue_time(int invc)
{
return virtualChannels[invc].get_enqueue_time();
}
void increment_credit(int in_vc, bool free_signal, Tick curTime);
inline flit*
peekTopFlit(int vc)
{
return virtualChannels[vc].peekTopFlit();
}
inline flit*
getTopFlit(int vc)
{
return virtualChannels[vc].getTopFlit();
}
inline bool
need_stage(int vc, flit_stage stage, Tick time)
{
return virtualChannels[vc].need_stage(stage, time);
}
inline bool
isReady(int invc, Tick curTime)
{
return virtualChannels[invc].isReady(curTime);
}
flitBuffer* getCreditQueue() { return &creditQueue; }
inline void
set_in_link(NetworkLink *link)
{
m_in_link = link;
}
inline int get_inlink_id() { return m_in_link->get_id(); }
inline void
set_credit_link(CreditLink *credit_link)
{
m_credit_link = credit_link;
}
double get_buf_read_activity(unsigned int vnet) const
{ return m_num_buffer_reads[vnet]; }
double get_buf_write_activity(unsigned int vnet) const
{ return m_num_buffer_writes[vnet]; }
uint32_t functionalWrite(Packet *pkt);
void resetStats();
private:
Router *m_router;
int m_id;
PortDirection m_direction;
int m_vc_per_vnet;
NetworkLink *m_in_link;
CreditLink *m_credit_link;
flitBuffer creditQueue;
// Input Virtual channels
std::vector<VirtualChannel> virtualChannels;
// Statistical variables
std::vector<double> m_num_buffer_writes;
std::vector<double> m_num_buffer_reads;
};
#endif // __MEM_RUBY_NETWORK_GARNET_0_INPUTUNIT_HH__