InputUnit.hh

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/*
 * Copyright (c) 2020 Inria
 * Copyright (c) 2016 Georgia Institute of Technology
 * Copyright (c) 2008 Princeton University
 * All rights reserved.
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 * neither the name of the copyright holders nor the names of its
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#ifndef __MEM_RUBY_NETWORK_GARNET2_0_INPUTUNIT_HH__
#define __MEM_RUBY_NETWORK_GARNET2_0_INPUTUNIT_HH__

#include <iostream>
#include <vector>

#include "mem/ruby/common/Consumer.hh"
#include "mem/ruby/network/garnet2.0/CommonTypes.hh"
#include "mem/ruby/network/garnet2.0/CreditLink.hh"
#include "mem/ruby/network/garnet2.0/NetworkLink.hh"
#include "mem/ruby/network/garnet2.0/Router.hh"
#include "mem/ruby/network/garnet2.0/VirtualChannel.hh"
#include "mem/ruby/network/garnet2.0/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, Cycles curTime)
    {
        virtualChannels[vc].set_idle(curTime);
    }

    inline void
    set_vc_active(int vc, Cycles 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 Cycles
    get_enqueue_time(int invc)
    {
        return virtualChannels[invc].get_enqueue_time();
    }

    void increment_credit(int in_vc, bool free_signal, Cycles 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, Cycles time)
    {
        return virtualChannels[vc].need_stage(stage, time);
    }

    inline bool
    isReady(int invc, Cycles 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_GARNET2_0_INPUTUNIT_HH__