/*
+ * 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.
*
#include "base/random.hh"
#include "base/trace.hh"
+#include "debug/Ethernet.hh"
+#include "debug/EthernetData.hh"
#include "dev/etherdump.hh"
#include "dev/etherint.hh"
#include "dev/etherlink.hh"
#include "dev/etherpkt.hh"
-#include "sim/builder.hh"
+#include "params/EtherLink.hh"
+#include "sim/core.hh"
#include "sim/serialize.hh"
#include "sim/system.hh"
-#include "sim/core.hh"
using namespace std;
-EtherLink::EtherLink(const string &name, EtherInt *peer0, EtherInt *peer1,
- double rate, Tick delay, Tick delayVar, EtherDump *dump)
- : SimObject(name)
+EtherLink::EtherLink(const Params *p)
+ : EtherObject(p)
{
- link[0] = new Link(name + ".link0", this, 0, rate, delay, delayVar, dump);
- link[1] = new Link(name + ".link1", this, 1, rate, delay, delayVar, dump);
+ 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]);
-
- interface[0]->setPeer(peer0);
- peer0->setPeer(interface[0]);
- interface[1]->setPeer(peer1);
- peer1->setPeer(interface[1]);
+ 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 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)
{
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)
+ doneEvent(this), txQueueEvent(this)
{ }
void
-EtherLink::serialize(ostream &os)
+EtherLink::serialize(CheckpointOut &cp) const
{
- link[0]->serialize("link0", os);
- link[1]->serialize("link1", os);
+ link[0]->serialize("link0", cp);
+ link[1]->serialize("link1", cp);
}
void
-EtherLink::unserialize(Checkpoint *cp, const string §ion)
+EtherLink::unserialize(CheckpointIn &cp)
{
- link[0]->unserialize("link0", cp, section);
- link[1]->unserialize("link1", cp, section);
+ link[0]->unserialize("link0", cp);
+ link[1]->unserialize("link1", cp);
}
void
rxint->sendPacket(packet);
}
-class LinkDelayEvent : public Event
-{
- protected:
- EtherLink::Link *link;
- EthPacketPtr packet;
-
- public:
- // non-scheduling version for createForUnserialize()
- LinkDelayEvent();
- LinkDelayEvent(EtherLink::Link *link, EthPacketPtr pkt, Tick when);
-
- void process();
-
- virtual void serialize(ostream &os);
- virtual void unserialize(Checkpoint *cp, const string §ion);
- static Serializable *createForUnserialize(Checkpoint *cp,
- const string §ion);
-};
-
void
EtherLink::Link::txDone()
{
if (linkDelay > 0) {
DPRINTF(Ethernet, "packet delayed: delay=%d\n", linkDelay);
- new LinkDelayEvent(this, packet, curTick + 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);
}
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)
{
packet = pkt;
Tick delay = (Tick)ceil(((double)pkt->length * ticksPerByte) + 1.0);
- if (delayVar != 0) {
- Random<Tick> var;
- delay += var.uniform(0, delayVar);
- }
+ if (delayVar != 0)
+ delay += random_mt.random<Tick>(0, delayVar);
+
DPRINTF(Ethernet, "scheduling packet: delay=%d, (rate=%f)\n",
delay, ticksPerByte);
- doneEvent.schedule(curTick + delay);
+ parent->schedule(doneEvent, curTick() + delay);
return true;
}
void
-EtherLink::Link::serialize(const string &base, ostream &os)
+EtherLink::Link::serialize(const string &base, CheckpointOut &cp) const
{
- bool packet_exists = packet;
- paramOut(os, base + ".packet_exists", packet_exists);
+ bool packet_exists = packet != nullptr;
+ paramOut(cp, base + ".packet_exists", packet_exists);
if (packet_exists)
- packet->serialize(base + ".packet", os);
+ packet->serialize(base + ".packet", cp);
bool event_scheduled = doneEvent.scheduled();
- paramOut(os, base + ".event_scheduled", event_scheduled);
+ paramOut(cp, base + ".event_scheduled", event_scheduled);
if (event_scheduled) {
Tick event_time = doneEvent.when();
- paramOut(os, base + ".event_time", event_time);
+ 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, Checkpoint *cp,
- const string §ion)
+EtherLink::Link::unserialize(const string &base, CheckpointIn &cp)
{
bool packet_exists;
- paramIn(cp, section, base + ".packet_exists", packet_exists);
+ paramIn(cp, base + ".packet_exists", packet_exists);
if (packet_exists) {
- packet = new EthPacketData(16384);
- packet->unserialize(base + ".packet", cp, section);
+ packet = make_shared<EthPacketData>(16384);
+ packet->unserialize(base + ".packet", cp);
}
bool event_scheduled;
- paramIn(cp, section, base + ".event_scheduled", event_scheduled);
+ paramIn(cp, base + ".event_scheduled", event_scheduled);
if (event_scheduled) {
Tick event_time;
- paramIn(cp, section, base + ".event_time", event_time);
- doneEvent.schedule(event_time);
+ paramIn(cp, base + ".event_time", event_time);
+ parent->schedule(doneEvent, event_time);
}
-}
-LinkDelayEvent::LinkDelayEvent()
- : Event(&mainEventQueue), link(NULL)
-{
- setFlags(AutoSerialize);
- setFlags(AutoDelete);
-}
+ 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<EthPacketData>(16384);
-LinkDelayEvent::LinkDelayEvent(EtherLink::Link *l, EthPacketPtr p, Tick when)
- : Event(&mainEventQueue), link(l), packet(p)
-{
- setFlags(AutoSerialize);
- setFlags(AutoDelete);
- schedule(when);
-}
+ paramIn(cp, csprintf("%s.txQueue[%i].tick", base, idx), tick);
+ delayed_packet->unserialize(
+ csprintf("%s.txQueue[%i].packet", base, idx), cp);
-void
-LinkDelayEvent::process()
-{
- link->txComplete(packet);
-}
-
-void
-LinkDelayEvent::serialize(ostream &os)
-{
- paramOut(os, "type", string("LinkDelayEvent"));
- Event::serialize(os);
-
- EtherLink *parent = link->parent;
- bool number = link->number;
- SERIALIZE_OBJPTR(parent);
- SERIALIZE_SCALAR(number);
-
- packet->serialize("packet", os);
-}
-
-
-void
-LinkDelayEvent::unserialize(Checkpoint *cp, const string §ion)
-{
- Event::unserialize(cp, section);
-
- EtherLink *parent;
- bool number;
- UNSERIALIZE_OBJPTR(parent);
- UNSERIALIZE_SCALAR(number);
-
- link = parent->link[number];
+ fatal_if(!txQueue.empty() && txQueue.back().first > tick,
+ "Invalid txQueue packet order in EtherLink!\n");
+ txQueue.emplace_back(std::make_pair(tick, delayed_packet));
+ }
- packet = new EthPacketData(16384);
- packet->unserialize("packet", cp, section);
-}
-
-
-Serializable *
-LinkDelayEvent::createForUnserialize(Checkpoint *cp, const string §ion)
-{
- return new LinkDelayEvent();
+ 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");
+ }
}
-REGISTER_SERIALIZEABLE("LinkDelayEvent", LinkDelayEvent)
-
-BEGIN_DECLARE_SIM_OBJECT_PARAMS(EtherLink)
-
- SimObjectParam<EtherInt *> int1;
- SimObjectParam<EtherInt *> int2;
- Param<double> speed;
- Param<Tick> delay;
- Param<Tick> delay_var;
- SimObjectParam<EtherDump *> dump;
-
-END_DECLARE_SIM_OBJECT_PARAMS(EtherLink)
-
-BEGIN_INIT_SIM_OBJECT_PARAMS(EtherLink)
-
- INIT_PARAM(int1, "interface 1"),
- INIT_PARAM(int2, "interface 2"),
- INIT_PARAM(speed, "link speed in bits per second"),
- INIT_PARAM(delay, "transmit delay of packets in us"),
- INIT_PARAM(delay_var, "Difference in amount of time to traverse wire"),
- INIT_PARAM(dump, "object to dump network packets to")
-
-END_INIT_SIM_OBJECT_PARAMS(EtherLink)
-
-CREATE_SIM_OBJECT(EtherLink)
+EtherLink *
+EtherLinkParams::create()
{
- return new EtherLink(getInstanceName(), int1, int2, speed, delay, delay_var,
- dump);
+ return new EtherLink(this);
}
-
-REGISTER_SIM_OBJECT("EtherLink", EtherLink)
projects / gem5.git / blobdiff