etherswitch.hh (11341:bda2c39fd9fd) etherswitch.hh (11533:2aa4d7bd47ec)
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
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>
39#include
40#include <set>
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 */
41
42#include "base/inet.hh"
43#include "dev/net/etherint.hh"
44#include "dev/net/etherlink.hh"
45#include "dev/net/etherobject.hh"
46#include "dev/net/etherpkt.hh"
47#include "dev/net/pktfifo.hh"
48#include "params/EtherSwitch.hh"

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62 }
63
64 EtherInt *getEthPort(const std::string &if_name, int idx) override;
65
66 protected:
67 /**
68 * Model for an Ethernet switch port
69 */
69 class Interface : public EtherInt
70 class Interface : public EtherInt, public Serializable
70 {
71 public:
72 Interface(const std::string &name, EtherSwitch *_etherSwitch,
73 uint64_t outputBufferSize, Tick delay, Tick delay_var,
71 {
72 public:
73 Interface(const std::string &name, EtherSwitch *_etherSwitch,
74 uint64_t outputBufferSize, Tick delay, Tick delay_var,
74 double rate);
75 double rate, unsigned id);
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 */
76 /**
77 * When a packet is received from a device, route it
78 * through an (several) output queue(s)
79 */
80 bool recvPacket(EthPacketPtr packet);
81 /**
82 * enqueue packet to the outputFifo
83 */
83 void enqueue(EthPacketPtr packet);
84 void enqueue(EthPacketPtr packet, unsigned senderId);
84 void sendDone() {}
85 Tick switchingDelay();
86
87 Interface* lookupDestPort(Net::EthAddr destAddr);
88 void learnSenderAddr(Net::EthAddr srcMacAddr, Interface *sender);
89
85 void sendDone() {}
86 Tick switchingDelay();
87
88 Interface* lookupDestPort(Net::EthAddr destAddr);
89 void learnSenderAddr(Net::EthAddr srcMacAddr, Interface *sender);
90
90 void serialize(const std::string &base, CheckpointOut &cp) const;
91 void unserialize(const std::string &base, CheckpointIn &cp);
91 void serialize(CheckpointOut &cp) const;
92 void unserialize(CheckpointIn &cp);
92
93 private:
94 const double ticksPerByte;
95 const Tick switchDelay;
96 const Tick delayVar;
93
94 private:
95 const double ticksPerByte;
96 const Tick switchDelay;
97 const Tick delayVar;
98 const unsigned interfaceId;
99
97 EtherSwitch *parent;
100 EtherSwitch *parent;
101 protected:
102 struct PortFifoEntry : public Serializable
103 {
104 PortFifoEntry(EthPacketPtr pkt, Tick recv_tick, unsigned id)
105 : packet(pkt), recvTick(recv_tick), srcId(id) {}
106
107 EthPacketPtr packet;
108 Tick recvTick;
109 // id of the port that the packet has been received from
110 unsigned srcId;
111 ~PortFifoEntry()
112 {
113 packet = nullptr;
114 recvTick = 0;
115 srcId = 0;
116 }
117 void serialize(CheckpointOut &cp) const;
118 void unserialize(CheckpointIn &cp);
119 };
120
121 class PortFifo : public Serializable
122 {
123 protected:
124 struct EntryOrder {
125 bool operator() (const PortFifoEntry& lhs,
126 const PortFifoEntry& rhs) const
127 {
128 if (lhs.recvTick == rhs.recvTick)
129 return lhs.srcId < rhs.srcId;
130 else
131 return lhs.recvTick < rhs.recvTick;
132 }
133 };
134 std::set<PortFifoEntry, EntryOrder> fifo;
135
136 const std::string objName;
137 const unsigned _maxsize;
138 unsigned _size;
139
140 public:
141 PortFifo(const std::string &name, int max)
142 :objName(name), _maxsize(max), _size(0) {}
143 ~PortFifo() {}
144
145 const std::string name() { return objName; }
146 // Returns the available capacity of the fifo.
147 // It can return a negative value because in "push" function
148 // we first push the received packet into the fifo and then
149 // check if we exceed the available capacity (if avail() < 0)
150 // and remove packets from the end of fifo
151 int avail() const { return _maxsize - _size; }
152
153 EthPacketPtr front() { return fifo.begin()->packet; }
154 bool empty() const { return _size == 0; }
155 unsigned size() const { return _size; }
156
157 /**
158 * Push a packet into the fifo
159 * and sort the packets with same recv tick by port id
160 */
161 bool push(EthPacketPtr ptr, unsigned senderId);
162 void pop();
163 void clear();
164 /**
165 * Serialization stuff
166 */
167 void serialize(CheckpointOut &cp) const;
168 void unserialize(CheckpointIn &cp);
169 };
98 /**
99 * output fifo at each interface
100 */
170 /**
171 * output fifo at each interface
172 */
101 PacketFifo outputFifo;
173 PortFifo outputFifo;
102 void transmit();
103 EventWrapper<Interface, &Interface::transmit> txEvent;
104 };
105
106 struct SwitchTableEntry {
107 Interface *interface;
108 Tick lastUseTime;
109 };

--- 14 unchanged lines hidden --- 		174 void transmit();
175 EventWrapper<Interface, &Interface::transmit> txEvent;
176 };
177
178 struct SwitchTableEntry {
179 Interface *interface;
180 Tick lastUseTime;
181 };

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