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

1 files changed, 280 insertions, 0 deletions

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 <cmath>
+#include <deque>
+#include <string>
+#include <vector>
+
+#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<Tick>(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<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(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<EthPacketData>(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);
+}