src/mem/ruby/network/garnet2.0/NetworkLink.cc

   1 /*
   2  * Copyright (c) 2008 Princeton University
   3  * Copyright (c) 2016 Georgia Institute of Technology
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions are
   8  * met: redistributions of source code must retain the above copyright
   9  * notice, this list of conditions and the following disclaimer;
  10  * redistributions in binary form must reproduce the above copyright
  11  * notice, this list of conditions and the following disclaimer in the
  12  * documentation and/or other materials provided with the distribution;
  13  * neither the name of the copyright holders nor the names of its
  14  * contributors may be used to endorse or promote products derived from
  15  * this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  18  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  19  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  20  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  21  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  22  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  23  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  24  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  25  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  26  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  27  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28  *
  29  * Authors: Niket Agarwal
  30  *          Tushar Krishna
  31  */
  32
  33
  34 #include "mem/ruby/network/garnet2.0/NetworkLink.hh"
  35
  36 #include "mem/ruby/network/garnet2.0/CreditLink.hh"
  37
  38 NetworkLink::NetworkLink(const Params *p)
  39     : ClockedObject(p), Consumer(this), m_id(p->link_id),
  40       m_type(NUM_LINK_TYPES_),
  41       m_latency(p->link_latency),
  42       linkBuffer(new flitBuffer()), link_consumer(nullptr),
  43       link_srcQueue(nullptr), m_link_utilized(0),
  44       m_vc_load(p->vcs_per_vnet * p->virt_nets)
  45 {
  46 }
  47
  48 NetworkLink::~NetworkLink()
  49 {
  50     delete linkBuffer;
  51 }
  52
  53 void
  54 NetworkLink::setLinkConsumer(Consumer *consumer)
  55 {
  56     link_consumer = consumer;
  57 }
  58
  59 void
  60 NetworkLink::setSourceQueue(flitBuffer *srcQueue)
  61 {
  62     link_srcQueue = srcQueue;
  63 }
  64
  65 void
  66 NetworkLink::wakeup()
  67 {
  68     if (link_srcQueue->isReady(curCycle())) {
  69         flit *t_flit = link_srcQueue->getTopFlit();
  70         t_flit->set_time(curCycle() + m_latency);
  71         linkBuffer->insert(t_flit);
  72         link_consumer->scheduleEventAbsolute(clockEdge(m_latency));
  73         m_link_utilized++;
  74         m_vc_load[t_flit->get_vc()]++;
  75     }
  76 }
  77
  78 NetworkLink *
  79 NetworkLinkParams::create()
  80 {
  81     return new NetworkLink(this);
  82 }
  83
  84 CreditLink *
  85 CreditLinkParams::create()
  86 {
  87     return new CreditLink(this);
  88 }
  89
  90 uint32_t
  91 NetworkLink::functionalWrite(Packet *pkt)
  92 {
  93     return linkBuffer->functionalWrite(pkt);
  94 }