From 23c961a0fd97251ee7c760bc2ff2a011a417ad9b Mon Sep 17 00:00:00 2001 From: Andreas Sandberg Date: Thu, 10 Dec 2015 10:35:18 +0000 Subject: dev: Move network devices to src/dev/net/ --HG-- rename : src/dev/Ethernet.py => src/dev/net/Ethernet.py rename : src/dev/etherbus.cc => src/dev/net/etherbus.cc rename : src/dev/etherbus.hh => src/dev/net/etherbus.hh rename : src/dev/etherdevice.cc => src/dev/net/etherdevice.cc rename : src/dev/etherdevice.hh => src/dev/net/etherdevice.hh rename : src/dev/etherdump.cc => src/dev/net/etherdump.cc rename : src/dev/etherdump.hh => src/dev/net/etherdump.hh rename : src/dev/etherint.cc => src/dev/net/etherint.cc rename : src/dev/etherint.hh => src/dev/net/etherint.hh rename : src/dev/etherlink.cc => src/dev/net/etherlink.cc rename : src/dev/etherlink.hh => src/dev/net/etherlink.hh rename : src/dev/etherobject.hh => src/dev/net/etherobject.hh rename : src/dev/etherpkt.cc => src/dev/net/etherpkt.cc rename : src/dev/etherpkt.hh => src/dev/net/etherpkt.hh rename : src/dev/ethertap.cc => src/dev/net/ethertap.cc rename : src/dev/ethertap.hh => src/dev/net/ethertap.hh rename : src/dev/i8254xGBe.cc => src/dev/net/i8254xGBe.cc rename : src/dev/i8254xGBe.hh => src/dev/net/i8254xGBe.hh rename : src/dev/i8254xGBe_defs.hh => src/dev/net/i8254xGBe_defs.hh rename : src/dev/multi_etherlink.cc => src/dev/net/multi_etherlink.cc rename : src/dev/multi_etherlink.hh => src/dev/net/multi_etherlink.hh rename : src/dev/multi_iface.cc => src/dev/net/multi_iface.cc rename : src/dev/multi_iface.hh => src/dev/net/multi_iface.hh rename : src/dev/multi_packet.cc => src/dev/net/multi_packet.cc rename : src/dev/multi_packet.hh => src/dev/net/multi_packet.hh rename : src/dev/ns_gige.cc => src/dev/net/ns_gige.cc rename : src/dev/ns_gige.hh => src/dev/net/ns_gige.hh rename : src/dev/ns_gige_reg.h => src/dev/net/ns_gige_reg.h rename : src/dev/pktfifo.cc => src/dev/net/pktfifo.cc rename : src/dev/pktfifo.hh => src/dev/net/pktfifo.hh rename : src/dev/sinic.cc => src/dev/net/sinic.cc rename : src/dev/sinic.hh => src/dev/net/sinic.hh rename : src/dev/sinicreg.hh => src/dev/net/sinicreg.hh rename : src/dev/tcp_iface.cc => src/dev/net/tcp_iface.cc rename : src/dev/tcp_iface.hh => src/dev/net/tcp_iface.hh --- src/dev/net/etherlink.cc | 280 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 280 insertions(+) create mode 100644 src/dev/net/etherlink.cc (limited to 'src/dev/net/etherlink.cc') diff --git a/src/dev/net/etherlink.cc b/src/dev/net/etherlink.cc new file mode 100644 index 000000000..c327a0168 --- /dev/null +++ b/src/dev/net/etherlink.cc @@ -0,0 +1,280 @@ +/* + * 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. + * + * Copyright (c) 2002-2005 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. + * + * Authors: Nathan Binkert + * Ron Dreslinski + */ + +/* @file + * Device module for modelling a fixed bandwidth full duplex ethernet link + */ + +#include "dev/net/etherlink.hh" + +#include +#include +#include +#include + +#include "base/random.hh" +#include "base/trace.hh" +#include "debug/Ethernet.hh" +#include "debug/EthernetData.hh" +#include "dev/net/etherdump.hh" +#include "dev/net/etherint.hh" +#include "dev/net/etherpkt.hh" +#include "params/EtherLink.hh" +#include "sim/core.hh" +#include "sim/serialize.hh" +#include "sim/system.hh" + +using namespace std; + +EtherLink::EtherLink(const Params *p) + : EtherObject(p) +{ + link[0] = new Link(name() + ".link0", this, 0, p->speed, + p->delay, p->delay_var, p->dump); + link[1] = new Link(name() + ".link1", this, 1, p->speed, + p->delay, p->delay_var, p->dump); + + interface[0] = new Interface(name() + ".int0", link[0], link[1]); + interface[1] = new Interface(name() + ".int1", link[1], link[0]); +} + + +EtherLink::~EtherLink() +{ + delete link[0]; + delete link[1]; + + delete interface[0]; + delete interface[1]; +} + +EtherInt* +EtherLink::getEthPort(const std::string &if_name, int idx) +{ + Interface *i; + if (if_name == "int0") + i = interface[0]; + else if (if_name == "int1") + i = interface[1]; + else + return NULL; + if (i->getPeer()) + panic("interface already connected to\n"); + + return i; +} + + +EtherLink::Interface::Interface(const string &name, Link *tx, Link *rx) + : EtherInt(name), txlink(tx) +{ + tx->setTxInt(this); + rx->setRxInt(this); +} + +EtherLink::Link::Link(const string &name, EtherLink *p, int num, + double rate, Tick delay, Tick delay_var, EtherDump *d) + : objName(name), parent(p), number(num), txint(NULL), rxint(NULL), + ticksPerByte(rate), linkDelay(delay), delayVar(delay_var), dump(d), + doneEvent(this), txQueueEvent(this) +{ } + +void +EtherLink::serialize(CheckpointOut &cp) const +{ + link[0]->serialize("link0", cp); + link[1]->serialize("link1", cp); +} + +void +EtherLink::unserialize(CheckpointIn &cp) +{ + link[0]->unserialize("link0", cp); + link[1]->unserialize("link1", cp); +} + +void +EtherLink::Link::txComplete(EthPacketPtr packet) +{ + DPRINTF(Ethernet, "packet received: len=%d\n", packet->length); + DDUMP(EthernetData, packet->data, packet->length); + rxint->sendPacket(packet); +} + +void +EtherLink::Link::txDone() +{ + if (dump) + dump->dump(packet); + + if (linkDelay > 0) { + DPRINTF(Ethernet, "packet delayed: delay=%d\n", linkDelay); + txQueue.emplace_back(std::make_pair(curTick() + linkDelay, packet)); + if (!txQueueEvent.scheduled()) + parent->schedule(txQueueEvent, txQueue.front().first); + } else { + assert(txQueue.empty()); + txComplete(packet); + } + + packet = 0; + assert(!busy()); + + txint->sendDone(); +} + +void +EtherLink::Link::processTxQueue() +{ + auto cur(txQueue.front()); + txQueue.pop_front(); + + // Schedule a new event to process the next packet in the queue. + if (!txQueue.empty()) { + auto next(txQueue.front()); + assert(next.first > curTick()); + parent->schedule(txQueueEvent, next.first); + } + + assert(cur.first == curTick()); + txComplete(cur.second); +} + +bool +EtherLink::Link::transmit(EthPacketPtr pkt) +{ + if (busy()) { + DPRINTF(Ethernet, "packet not sent, link busy\n"); + return false; + } + + DPRINTF(Ethernet, "packet sent: len=%d\n", pkt->length); + DDUMP(EthernetData, pkt->data, pkt->length); + + packet = pkt; + Tick delay = (Tick)ceil(((double)pkt->length * ticksPerByte) + 1.0); + if (delayVar != 0) + delay += random_mt.random(0, delayVar); + + DPRINTF(Ethernet, "scheduling packet: delay=%d, (rate=%f)\n", + delay, ticksPerByte); + parent->schedule(doneEvent, curTick() + delay); + + return true; +} + +void +EtherLink::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 = doneEvent.scheduled(); + paramOut(cp, base + ".event_scheduled", event_scheduled); + if (event_scheduled) { + Tick event_time = doneEvent.when(); + paramOut(cp, base + ".event_time", event_time); + } + + const size_t tx_queue_size(txQueue.size()); + paramOut(cp, base + ".tx_queue_size", tx_queue_size); + unsigned idx(0); + for (const auto &pe : txQueue) { + paramOut(cp, csprintf("%s.txQueue[%i].tick", base, idx), pe.first); + pe.second->serialize(csprintf("%s.txQueue[%i].packet", base, idx), cp); + + ++idx; + } +} + +void +EtherLink::Link::unserialize(const string &base, CheckpointIn &cp) +{ + bool packet_exists; + paramIn(cp, base + ".packet_exists", packet_exists); + if (packet_exists) { + packet = make_shared(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(doneEvent, event_time); + } + + size_t tx_queue_size; + if (optParamIn(cp, base + ".tx_queue_size", tx_queue_size)) { + for (size_t idx = 0; idx < tx_queue_size; ++idx) { + Tick tick; + EthPacketPtr delayed_packet = make_shared(16384); + + paramIn(cp, csprintf("%s.txQueue[%i].tick", base, idx), tick); + delayed_packet->unserialize( + csprintf("%s.txQueue[%i].packet", base, idx), cp); + + fatal_if(!txQueue.empty() && txQueue.back().first > tick, + "Invalid txQueue packet order in EtherLink!\n"); + txQueue.emplace_back(std::make_pair(tick, delayed_packet)); + } + + if (!txQueue.empty()) + parent->schedule(txQueueEvent, txQueue.front().first); + } else { + // We can't reliably convert in-flight packets from old + // checkpoints. In fact, gem5 hasn't been able to load these + // packets for at least two years before the format change. + warn("Old-style EtherLink serialization format detected, " + "in-flight packets may have been dropped.\n"); + } +} + +EtherLink * +EtherLinkParams::create() +{ + return new EtherLink(this); +} -- cgit v1.2.3