dev: Distributed Ethernet link for distributed gem5 simulations

Distributed gem5 (abbreviated dist-gem5) is the result of the
convergence effort between multi-gem5 and pd-gem5 (from Univ. of
Wisconsin). It relies on the base multi-gem5 infrastructure for packet
forwarding, synchronisation and checkpointing but combines those with
the elaborated network switch model from pd-gem5.

--HG--
rename : src/dev/net/multi_etherlink.cc => src/dev/net/dist_etherlink.cc
rename : src/dev/net/multi_etherlink.hh => src/dev/net/dist_etherlink.hh
rename : src/dev/net/multi_iface.cc => src/dev/net/dist_iface.cc
rename : src/dev/net/multi_iface.hh => src/dev/net/dist_iface.hh
rename : src/dev/net/multi_packet.hh => src/dev/net/dist_packet.hh

1 files changed, 0 insertions, 266 deletions

diff --git a/src/dev/net/multi_etherlink.cc b/src/dev/net/multi_etherlink.cc
deleted file mode 100644
index cf4300ddf..000000000
--- a/src/dev/net/multi_etherlink.cc
+++ /dev/null
@@ -1,266 +0,0 @@
-/*
- * Copyright (c) 2015 ARM Limited
- * All rights reserved
- *
- * The license below extends only to copyright in the software and shall
- * not be construed as granting a license to any other intellectual
- * property including but not limited to intellectual property relating
- * to a hardware implementation of the functionality of the software
- * licensed hereunder.  You may use the software subject to the license
- * terms below provided that you ensure that this notice is replicated
- * unmodified and in its entirety in all distributions of the software,
- * modified or unmodified, in source code or in binary form.
- *
- * 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.
- *
- * Authors: Gabor Dozsa
- */
-
-/* @file
- * Device module for a full duplex ethernet link for multi gem5 simulations.
- */
-
-#include "dev/net/multi_etherlink.hh"
-
-#include <arpa/inet.h>
-#include <sys/socket.h>
-#include <unistd.h>
-
-#include <cmath>
-#include <deque>
-#include <string>
-#include <vector>
-
-#include "base/random.hh"
-#include "base/trace.hh"
-#include "debug/EthernetData.hh"
-#include "debug/MultiEthernet.hh"
-#include "debug/MultiEthernetPkt.hh"
-#include "dev/net/etherdump.hh"
-#include "dev/net/etherint.hh"
-#include "dev/net/etherlink.hh"
-#include "dev/net/etherobject.hh"
-#include "dev/net/etherpkt.hh"
-#include "dev/net/multi_iface.hh"
-#include "dev/net/tcp_iface.hh"
-#include "params/EtherLink.hh"
-#include "sim/core.hh"
-#include "sim/serialize.hh"
-#include "sim/system.hh"
-
-using namespace std;
-
-MultiEtherLink::MultiEtherLink(const Params *p)
-    : EtherObject(p)
-{
-    DPRINTF(MultiEthernet,"MultiEtherLink::MultiEtherLink() "
-            "link delay:%llu\n", p->delay);
-
-    txLink = new TxLink(name() + ".link0", this, p->speed, p->delay_var,
-                        p->dump);
-    rxLink = new RxLink(name() + ".link1", this, p->delay, p->dump);
-
-    // create the multi (TCP) interface to talk to the peer gem5 processes.
-    multiIface = new TCPIface(p->server_name, p->server_port, p->multi_rank,
-                              p->sync_start, p->sync_repeat, this);
-
-    localIface = new LocalIface(name() + ".int0", txLink, rxLink, multiIface);
-}
-
-MultiEtherLink::~MultiEtherLink()
-{
-    delete txLink;
-    delete rxLink;
-    delete localIface;
-    delete multiIface;
-}
-
-EtherInt*
-MultiEtherLink::getEthPort(const std::string &if_name, int idx)
-{
-    if (if_name != "int0") {
-        return nullptr;
-    } else {
-        panic_if(localIface->getPeer(), "interface already connected to");
-    }
-    return localIface;
-}
-
-void MultiEtherLink::memWriteback()
-{
-    DPRINTF(MultiEthernet,"MultiEtherLink::memWriteback() called\n");
-    multiIface->drainDone();
-}
-
-void
-MultiEtherLink::serialize(CheckpointOut &cp) const
-{
-    multiIface->serialize("multiIface", cp);
-    txLink->serialize("txLink", cp);
-    rxLink->serialize("rxLink", cp);
-}
-
-void
-MultiEtherLink::unserialize(CheckpointIn &cp)
-{
-    multiIface->unserialize("multiIface", cp);
-    txLink->unserialize("txLink", cp);
-    rxLink->unserialize("rxLink", cp);
-}
-
-void
-MultiEtherLink::init()
-{
-    DPRINTF(MultiEthernet,"MultiEtherLink::init() called\n");
-    multiIface->initRandom();
-}
-
-void
-MultiEtherLink::startup()
-{
-    DPRINTF(MultiEthernet,"MultiEtherLink::startup() called\n");
-    multiIface->startPeriodicSync();
-}
-
-void
-MultiEtherLink::RxLink::setMultiInt(MultiIface *m)
-{
-    assert(!multiIface);
-    multiIface = m;
-    // Spawn a new receiver thread that will process messages
-    // coming in from peer gem5 processes.
-    // The receive thread will also schedule a (receive) doneEvent
-    // for each incoming data packet.
-    multiIface->spawnRecvThread(&doneEvent, linkDelay);
-}
-
-void
-MultiEtherLink::RxLink::rxDone()
-{
-    assert(!busy());
-
-    // retrieve the packet that triggered the receive done event
-    packet = multiIface->packetIn();
-
-    if (dump)
-        dump->dump(packet);
-
-    DPRINTF(MultiEthernetPkt, "MultiEtherLink::MultiLink::rxDone() "
-            "packet received: len=%d\n", packet->length);
-    DDUMP(EthernetData, packet->data, packet->length);
-
-    localIface->sendPacket(packet);
-
-    packet = nullptr;
-}
-
-void
-MultiEtherLink::TxLink::txDone()
-{
-    if (dump)
-        dump->dump(packet);
-
-    packet = nullptr;
-    assert(!busy());
-
-    localIface->sendDone();
-}
-
-bool
-MultiEtherLink::TxLink::transmit(EthPacketPtr pkt)
-{
-    if (busy()) {
-        DPRINTF(MultiEthernet, "packet not sent, link busy\n");
-        return false;
-    }
-
-    packet = pkt;
-    Tick delay = (Tick)ceil(((double)pkt->length * ticksPerByte) + 1.0);
-    if (delayVar != 0)
-        delay += random_mt.random<Tick>(0, delayVar);
-
-    // send the packet to the peers
-    assert(multiIface);
-    multiIface->packetOut(pkt, delay);
-
-    // schedule the send done event
-    parent->schedule(doneEvent, curTick() + delay);
-
-    return true;
-}
-
-void
-MultiEtherLink::Link::serialize(const string &base, CheckpointOut &cp) const
-{
-    bool packet_exists = (packet != nullptr);
-    paramOut(cp, base + ".packet_exists", packet_exists);
-    if (packet_exists)
-        packet->serialize(base + ".packet", cp);
-
-    bool event_scheduled = event->scheduled();
-    paramOut(cp, base + ".event_scheduled", event_scheduled);
-    if (event_scheduled) {
-        Tick event_time = event->when();
-        paramOut(cp, base + ".event_time", event_time);
-    }
-}
-
-void
-MultiEtherLink::Link::unserialize(const string &base, CheckpointIn &cp)
-{
-    bool packet_exists;
-    paramIn(cp, base + ".packet_exists", packet_exists);
-    if (packet_exists) {
-        packet = make_shared<EthPacketData>(16384);
-        packet->unserialize(base + ".packet", cp);
-    }
-
-    bool event_scheduled;
-    paramIn(cp, base + ".event_scheduled", event_scheduled);
-    if (event_scheduled) {
-        Tick event_time;
-        paramIn(cp, base + ".event_time", event_time);
-        parent->schedule(*event, event_time);
-    }
-}
-
-MultiEtherLink::LocalIface::LocalIface(const std::string &name,
-                                       TxLink *tx,
-                                       RxLink *rx,
-                                       MultiIface *m) :
-    EtherInt(name), txLink(tx)
-{
-    tx->setLocalInt(this);
-    rx->setLocalInt(this);
-    tx->setMultiInt(m);
-    rx->setMultiInt(m);
-}
-
-MultiEtherLink *
-MultiEtherLinkParams::create()
-{
-    return new MultiEtherLink(this);
-}
-
-