| /* |
| * Copyright (c) 2003 The Regents of The University of Michigan |
| * 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. |
| */ |
| |
| /* @file |
| * Device module for modelling a fixed bandwidth full duplex ethernet link |
| */ |
| |
| #include <deque> |
| #include <string> |
| #include <vector> |
| |
| #include <math.h> |
| |
| #include "dev/etherlink.hh" |
| #include "dev/etherdump.hh" |
| #include "dev/etherint.hh" |
| #include "dev/etherpkt.hh" |
| #include "base/trace.hh" |
| #include "sim/universe.hh" |
| |
| using namespace std; |
| |
| EtherLink::EtherLink(const std::string &name, EtherInt *i1, EtherInt *i2, |
| Tick speed, EtherDump *dump) |
| : SimObject(name) |
| { |
| double rate = ((double)ticksPerSecond * 8.0) / (double)speed; |
| |
| link1 = new Link(name + ".link1", rate, dump); |
| link2 = new Link(name + ".link2", rate, dump); |
| |
| int1 = new Interface(name + ".int1", link1, link2); |
| int2 = new Interface(name + ".int2", link2, link1); |
| |
| int1->setPeer(i1); |
| i1->setPeer(int1); |
| int2->setPeer(i2); |
| i2->setPeer(int2); |
| } |
| |
| EtherLink::~EtherLink() |
| { |
| delete link1; |
| delete link2; |
| |
| delete int1; |
| delete int2; |
| } |
| |
| EtherLink::Interface::Interface(const std::string &name, Link *tx, Link *rx) |
| : EtherInt(name), txlink(tx) |
| { |
| tx->setTxInt(this); |
| rx->setRxInt(this); |
| } |
| |
| EtherLink::Link::Link(const std::string &name, double rate, EtherDump *d) |
| : Serializeable(name), txint(NULL), rxint(NULL), ticks_per_byte(rate), |
| dump(d), event(&mainEventQueue, this) |
| {} |
| |
| void |
| EtherLink::Link::txDone() |
| { |
| rxint->sendPacket(packet); |
| |
| if (dump) |
| dump->dump(packet); |
| |
| DPRINTF(Ethernet, "EtherLink packet received: len=%d\n", packet->length); |
| DDUMP(EthernetData, packet->data, packet->length); |
| |
| packet = 0; |
| assert(!busy()); |
| |
| txint->sendDone(); |
| } |
| |
| bool |
| EtherLink::Link::transmit(PacketPtr pkt) |
| { |
| if (busy()) { |
| DPRINTF(Ethernet, "EtherLink packet not sent, link busy\n"); |
| return false; |
| } |
| |
| DPRINTF(Ethernet, "EtherLink packet sent: len=%d\n", pkt->length); |
| DDUMP(EthernetData, pkt->data, pkt->length); |
| |
| packet = pkt; |
| int delay = (int)ceil(((double)pkt->length * ticks_per_byte) + 1.0); |
| DPRINTF(Ethernet, "EtherLink scheduling packet: delay=%d, (rate=%f)\n", |
| delay, ticks_per_byte); |
| event.schedule(curTick + delay); |
| |
| return true; |
| } |
| |
| BEGIN_DECLARE_SIM_OBJECT_PARAMS(EtherLink) |
| |
| SimObjectParam<EtherInt *> interface1; |
| SimObjectParam<EtherInt *> interface2; |
| Param<int> link_speed; |
| SimObjectParam<EtherDump *> packet_dump; |
| |
| END_DECLARE_SIM_OBJECT_PARAMS(EtherLink) |
| |
| BEGIN_INIT_SIM_OBJECT_PARAMS(EtherLink) |
| |
| INIT_PARAM(interface1, "interface 1"), |
| INIT_PARAM(interface2, "interface 2"), |
| INIT_PARAM_DFLT(link_speed, "link speed in bits per second", 100000000), |
| INIT_PARAM_DFLT(packet_dump, "object to dump network packets to", NULL) |
| |
| END_INIT_SIM_OBJECT_PARAMS(EtherLink) |
| |
| CREATE_SIM_OBJECT(EtherLink) |
| { |
| return new EtherLink(getInstanceName(), interface1, interface2, link_speed, |
| packet_dump); |
| } |
| |
| REGISTER_SIM_OBJECT("EtherLink", EtherLink) |