gem5/dev/etherlink.cc
Ali Saidi 8f8d09538f Mostly done with all device models for new memory system. Still need to get timing packets working and get sinic working
after merge from head. Checkpointing may need some work now. Endian-happiness still not complete.

SConscript:
    add all devices back into make file
base/inet.hh:
dev/etherbus.cc:
dev/etherbus.hh:
dev/etherdump.cc:
dev/etherdump.hh:
dev/etherint.hh:
dev/etherlink.cc:
dev/etherlink.hh:
dev/etherpkt.cc:
dev/etherpkt.hh:
dev/ethertap.cc:
dev/ethertap.hh:
dev/pktfifo.cc:
dev/pktfifo.hh:
    rename PacketPtr EthPacketPtr so it doesn't conflict with the PacketPtr type in the memory system
configs/test/fs.py:
    add nics to fs.py
cpu/cpu_exec_context.cc:
    remove this check, as it's not valid. We may want to add something else back in to make sure that no one can delete the
    static virtual ports in the exec context
cpu/simple/cpu.cc:
cpu/simple/cpu.hh:
dev/alpha_console.cc:
dev/ide_ctrl.cc:
    use new methods for accessing packet data
dev/ide_disk.cc:
    add some more dprintfs
dev/io_device.cc:
    delete packets when we are done with them. Update for new packet methods to access data
dev/isa_fake.cc:
dev/pciconfigall.cc:
dev/tsunami_cchip.cc:
dev/tsunami_io.cc:
dev/tsunami_pchip.cc:
dev/uart8250.cc:
dev/uart8250.hh:
mem/physical.cc:
mem/port.cc:
    dUpdate for new packet methods to access data
dev/ns_gige.cc:
    Update for new memory system
dev/ns_gige.hh:
python/m5/objects/Ethernet.py:
    update for new memory system
dev/sinic.cc:
dev/sinic.hh:
    Update for new memory system. Untested as need to merge in head because of kernel driver differences between versions
mem/packet.hh:
    Add methods to access data instead of accessing it directly.

--HG--
extra : convert_revision : 223f43876afd404e68337270cd9a5e44d0bf553e
2006-04-24 19:31:50 -04:00

300 lines
8.2 KiB
C++

/*
* 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.
*/
/* @file
* Device module for modelling a fixed bandwidth full duplex ethernet link
*/
#include <cmath>
#include <deque>
#include <string>
#include <vector>
#include "base/random.hh"
#include "base/trace.hh"
#include "dev/etherdump.hh"
#include "dev/etherint.hh"
#include "dev/etherlink.hh"
#include "dev/etherpkt.hh"
#include "sim/builder.hh"
#include "sim/serialize.hh"
#include "sim/system.hh"
#include "sim/root.hh"
using namespace std;
EtherLink::EtherLink(const string &name, EtherInt *peer0, EtherInt *peer1,
double rate, Tick delay, Tick delayVar, EtherDump *dump)
: SimObject(name)
{
link[0] = new Link(name + ".link0", this, 0, rate, delay, delayVar, dump);
link[1] = new Link(name + ".link1", this, 1, rate, delay, delayVar, 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]);
}
EtherLink::~EtherLink()
{
delete link[0];
delete link[1];
delete interface[0];
delete interface[1];
}
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)
{ }
void
EtherLink::serialize(ostream &os)
{
link[0]->serialize("link0", os);
link[1]->serialize("link1", os);
}
void
EtherLink::unserialize(Checkpoint *cp, const string &section)
{
link[0]->unserialize("link0", cp, section);
link[1]->unserialize("link1", cp, section);
}
void
EtherLink::Link::txComplete(EthPacketPtr packet)
{
DPRINTF(Ethernet, "packet received: len=%d\n", packet->length);
DDUMP(EthernetData, packet->data, packet->length);
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 &section);
static Serializable *createForUnserialize(Checkpoint *cp,
const string &section);
};
void
EtherLink::Link::txDone()
{
if (dump)
dump->dump(packet);
if (linkDelay > 0) {
DPRINTF(Ethernet, "packet delayed: delay=%d\n", linkDelay);
new LinkDelayEvent(this, packet, curTick + linkDelay);
} else {
txComplete(packet);
}
packet = 0;
assert(!busy());
txint->sendDone();
}
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) {
Random<Tick> var;
delay += var.uniform(0, delayVar);
}
DPRINTF(Ethernet, "scheduling packet: delay=%d, (rate=%f)\n",
delay, ticksPerByte);
doneEvent.schedule(curTick + delay);
return true;
}
void
EtherLink::Link::serialize(const string &base, ostream &os)
{
bool packet_exists = packet;
paramOut(os, base + ".packet_exists", packet_exists);
if (packet_exists)
packet->serialize(base + ".packet", os);
bool event_scheduled = doneEvent.scheduled();
paramOut(os, base + ".event_scheduled", event_scheduled);
if (event_scheduled) {
Tick event_time = doneEvent.when();
paramOut(os, base + ".event_time", event_time);
}
}
void
EtherLink::Link::unserialize(const string &base, Checkpoint *cp,
const string &section)
{
bool packet_exists;
paramIn(cp, section, base + ".packet_exists", packet_exists);
if (packet_exists) {
packet = new EthPacketData(16384);
packet->unserialize(base + ".packet", cp, section);
}
bool event_scheduled;
paramIn(cp, section, base + ".event_scheduled", event_scheduled);
if (event_scheduled) {
Tick event_time;
paramIn(cp, section, base + ".event_time", event_time);
doneEvent.schedule(event_time);
}
}
LinkDelayEvent::LinkDelayEvent()
: Event(&mainEventQueue), link(NULL)
{
setFlags(AutoSerialize);
setFlags(AutoDelete);
}
LinkDelayEvent::LinkDelayEvent(EtherLink::Link *l, EthPacketPtr p, Tick when)
: Event(&mainEventQueue), link(l), packet(p)
{
setFlags(AutoSerialize);
setFlags(AutoDelete);
schedule(when);
}
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 &section)
{
Event::unserialize(cp, section);
EtherLink *parent;
bool number;
UNSERIALIZE_OBJPTR(parent);
UNSERIALIZE_SCALAR(number);
link = parent->link[number];
packet = new EthPacketData(16384);
packet->unserialize("packet", cp, section);
}
Serializable *
LinkDelayEvent::createForUnserialize(Checkpoint *cp, const string &section)
{
return new LinkDelayEvent();
}
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)
{
return new EtherLink(getInstanceName(), int1, int2, speed, delay, delay_var,
dump);
}
REGISTER_SIM_OBJECT("EtherLink", EtherLink)