d4343f91d5
dev/etherlink.cc:
DPRINTF before the packet is sent to the other interface to
make the output a little more understandable
--HG--
extra : convert_revision : 9c7dd5dd6dbbbc416db70a52228e918af2e76d96
148 lines
4.4 KiB
C++
148 lines
4.4 KiB
C++
/*
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* Copyright (c) 2003 The Regents of The University of Michigan
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution;
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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/* @file
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* Device module for modelling a fixed bandwidth full duplex ethernet link
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*/
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#include <cmath>
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#include <deque>
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#include <string>
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#include <vector>
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#include "base/trace.hh"
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#include "dev/etherdump.hh"
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#include "dev/etherint.hh"
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#include "dev/etherlink.hh"
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#include "dev/etherpkt.hh"
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#include "sim/builder.hh"
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#include "sim/universe.hh"
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using namespace std;
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EtherLink::EtherLink(const std::string &name, EtherInt *i1, EtherInt *i2,
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Tick speed, EtherDump *dump)
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: SimObject(name)
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{
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double rate = ((double)ticksPerSecond * 8.0) / (double)speed;
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link1 = new Link(name + ".link1", rate, dump);
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link2 = new Link(name + ".link2", rate, dump);
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int1 = new Interface(name + ".int1", link1, link2);
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int2 = new Interface(name + ".int2", link2, link1);
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int1->setPeer(i1);
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i1->setPeer(int1);
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int2->setPeer(i2);
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i2->setPeer(int2);
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}
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EtherLink::~EtherLink()
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{
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delete link1;
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delete link2;
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delete int1;
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delete int2;
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}
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EtherLink::Interface::Interface(const std::string &name, Link *tx, Link *rx)
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: EtherInt(name), txlink(tx)
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{
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tx->setTxInt(this);
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rx->setRxInt(this);
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}
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EtherLink::Link::Link(const std::string &name, double rate, EtherDump *d)
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: Serializeable(name), txint(NULL), rxint(NULL), ticks_per_byte(rate),
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dump(d), event(&mainEventQueue, this)
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{}
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void
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EtherLink::Link::txDone()
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{
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if (dump)
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dump->dump(packet);
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DPRINTF(Ethernet, "EtherLink packet received: len=%d\n", packet->length);
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DDUMP(EthernetData, packet->data, packet->length);
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rxint->sendPacket(packet);
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packet = 0;
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assert(!busy());
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txint->sendDone();
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}
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bool
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EtherLink::Link::transmit(PacketPtr pkt)
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{
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if (busy()) {
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DPRINTF(Ethernet, "EtherLink packet not sent, link busy\n");
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return false;
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}
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DPRINTF(Ethernet, "EtherLink packet sent: len=%d\n", pkt->length);
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DDUMP(EthernetData, pkt->data, pkt->length);
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packet = pkt;
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int delay = (int)ceil(((double)pkt->length * ticks_per_byte) + 1.0);
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DPRINTF(Ethernet, "EtherLink scheduling packet: delay=%d, (rate=%f)\n",
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delay, ticks_per_byte);
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event.schedule(curTick + delay);
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return true;
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}
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BEGIN_DECLARE_SIM_OBJECT_PARAMS(EtherLink)
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SimObjectParam<EtherInt *> interface1;
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SimObjectParam<EtherInt *> interface2;
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Param<int> link_speed;
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SimObjectParam<EtherDump *> packet_dump;
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END_DECLARE_SIM_OBJECT_PARAMS(EtherLink)
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BEGIN_INIT_SIM_OBJECT_PARAMS(EtherLink)
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INIT_PARAM(interface1, "interface 1"),
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INIT_PARAM(interface2, "interface 2"),
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INIT_PARAM_DFLT(link_speed, "link speed in bits per second", 100000000),
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INIT_PARAM_DFLT(packet_dump, "object to dump network packets to", NULL)
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END_INIT_SIM_OBJECT_PARAMS(EtherLink)
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CREATE_SIM_OBJECT(EtherLink)
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{
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return new EtherLink(getInstanceName(), interface1, interface2, link_speed,
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packet_dump);
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}
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REGISTER_SIM_OBJECT("EtherLink", EtherLink)
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