NetworkLink.cc

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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
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 * neither the name of the copyright holders nor the names of its
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 * 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
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#include "mem/ruby/network/garnet2.0/NetworkLink.hh"

#include "mem/ruby/network/garnet2.0/CreditLink.hh"

NetworkLink::NetworkLink(const Params *p)
    : ClockedObject(p), Consumer(this), m_id(p->link_id),
      m_type(NUM_LINK_TYPES_),
      m_latency(p->link_latency),
      linkBuffer(), link_consumer(nullptr),
      link_srcQueue(nullptr), m_link_utilized(0),
      m_vc_load(p->vcs_per_vnet * p->virt_nets)
{
}

void
NetworkLink::setLinkConsumer(Consumer *consumer)
{
    link_consumer = consumer;
}

void
NetworkLink::setSourceQueue(flitBuffer* src_queue)
{
    link_srcQueue = src_queue;
}

void
NetworkLink::wakeup()
{
    assert(link_srcQueue != nullptr);
    if (link_srcQueue->isReady(curCycle())) {
        flit *t_flit = link_srcQueue->getTopFlit();
        t_flit->set_time(curCycle() + m_latency);
        linkBuffer.insert(t_flit);
        link_consumer->scheduleEventAbsolute(clockEdge(m_latency));
        m_link_utilized++;
        m_vc_load[t_flit->get_vc()]++;
    }
}

void
NetworkLink::resetStats()
{
    for (int i = 0; i < m_vc_load.size(); i++) {
        m_vc_load[i] = 0;
    }

    m_link_utilized = 0;
}

NetworkLink *
NetworkLinkParams::create()
{
    return new NetworkLink(this);
}

CreditLink *
CreditLinkParams::create()
{
    return new CreditLink(this);
}

uint32_t
NetworkLink::functionalWrite(Packet *pkt)
{
    return linkBuffer.functionalWrite(pkt);
}