1/*
2 * Copyright (c) 2014 The Regents of The University of Michigan
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met: redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer;

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31
32/* @file
33 * Device model for an ethernet switch
34 */
35
36#ifndef __DEV_ETHERSWITCH_HH__
37#define __DEV_ETHERSWITCH_HH__
38
39#include <unordered_map>
40
41#include "base/inet.hh"
42#include "dev/net/etherint.hh"
43#include "dev/net/etherlink.hh"
44#include "dev/net/etherobject.hh"
45#include "dev/net/etherpkt.hh"
46#include "dev/net/pktfifo.hh"
47#include "params/EtherSwitch.hh"

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61 }
62
63 EtherInt *getEthPort(const std::string &if_name, int idx) override;
64
65 protected:
66 /**
67 * Model for an Ethernet switch port
68 */
69 class Interface : public EtherInt
70 {
71 public:
72 Interface(const std::string &name, EtherSwitch *_etherSwitch,
73 uint64_t outputBufferSize, Tick delay, Tick delay_var,
74 double rate);
75 /**
76 * When a packet is received from a device, route it
77 * through an (several) output queue(s)
78 */
79 bool recvPacket(EthPacketPtr packet);
80 /**
81 * enqueue packet to the outputFifo
82 */
83 void enqueue(EthPacketPtr packet);
84 void sendDone() {}
85 Tick switchingDelay();
86
87 Interface* lookupDestPort(Net::EthAddr destAddr);
88 void learnSenderAddr(Net::EthAddr srcMacAddr, Interface *sender);
89
90 void serialize(const std::string &base, CheckpointOut &cp) const;
91 void unserialize(const std::string &base, CheckpointIn &cp);
92
93 private:
94 const double ticksPerByte;
95 const Tick switchDelay;
96 const Tick delayVar;
97 EtherSwitch *parent;
98 /**
99 * output fifo at each interface
100 */
101 PacketFifo outputFifo;
102 void transmit();
103 EventWrapper<Interface, &Interface::transmit> txEvent;
104 };
105
106 struct SwitchTableEntry {
107 Interface *interface;
108 Tick lastUseTime;
109 };

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