/*
 * 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.
 *
 * Authors: Niket Agarwal
 */

#ifndef NETWORK_LINK_H
#define NETWORK_LINK_H

#include <iostream>
#include <vector>

#include "mem/ruby/network/garnet/NetworkHeader.hh"
#include "mem/ruby/network/garnet/flexible-pipeline/FlexibleConsumer.hh"
#include "mem/ruby/network/garnet/flexible-pipeline/flitBuffer.hh"
#include "mem/ruby/common/NetDest.hh"

class GarnetNetwork;

class NetworkLink : public FlexibleConsumer {
public:
        NetworkLink();
        NetworkLink(int id, int latency, GarnetNetwork *net_ptr);
        ~NetworkLink();

        void setLinkConsumer(FlexibleConsumer *consumer);
        void setSourceQueue(flitBuffer *srcQueue);
        flit* peekLink();
        flit* consumeLink();

        void print(std::ostream& out) const {}

        bool is_vc_ready(flit *t_flit);

        int get_id();
        void setInPort(int port);
        void setOutPort(int port);
        void wakeup();
        bool isReady();
        void grant_vc_link(int vc, Time grant_time);
        void release_vc_link(int vc, Time release_time);
        void request_vc_link(int vc, NetDest destination, Time request_time);
        bool isBufferNotFull_link(int vc);
        void setSource(FlexibleConsumer *source);
        double getLinkUtilization();
        std::vector<int> getVcLoad();

protected:
        int m_id, m_latency;
        int m_in_port, m_out_port;
        int m_link_utilized;
        std::vector<int> m_vc_load;
        GarnetNetwork *m_net_ptr;

        flitBuffer *linkBuffer;
        FlexibleConsumer *link_consumer;
        FlexibleConsumer *link_source;
        flitBuffer *link_srcQueue;
};

#endif