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-rw-r--r--SConscript1
-rw-r--r--dev/ns_gige.cc66
-rw-r--r--dev/ns_gige.hh11
-rw-r--r--dev/pktfifo.cc68
-rw-r--r--dev/pktfifo.hh95
5 files changed, 181 insertions, 60 deletions
diff --git a/SConscript b/SConscript
index a2b1c44fa..4fedf25ba 100644
--- a/SConscript
+++ b/SConscript
@@ -271,6 +271,7 @@ full_system_sources = Split('''
dev/etherdev.cc
dev/pciconfigall.cc
dev/pcidev.cc
+ dev/pktfifo.cc
dev/scsi.cc
dev/scsi_ctrl.cc
dev/scsi_disk.cc
diff --git a/dev/ns_gige.cc b/dev/ns_gige.cc
index 39bae07ab..e34420a8e 100644
--- a/dev/ns_gige.cc
+++ b/dev/ns_gige.cc
@@ -1060,7 +1060,6 @@ NSGigE::txReset()
DPRINTF(Ethernet, "transmit reset\n");
CTDD = false;
- txFifoAvail = maxTxFifoSize;
txEnable = false;;
txFragPtr = 0;
assert(txDescCnt == 0);
@@ -1076,7 +1075,6 @@ NSGigE::rxReset()
CRDD = false;
assert(rxPktBytes == 0);
- rxFifoCnt = 0;
rxEnable = false;
rxFragPtr = 0;
assert(rxDescCnt == 0);
@@ -1346,9 +1344,7 @@ NSGigE::rxKick()
// Must clear the value before popping to decrement the
// reference count
- rxFifo.front() = NULL;
- rxFifo.pop_front();
- rxFifoCnt -= rxPacket->length;
+ rxFifo.pop();
}
@@ -1536,7 +1532,7 @@ NSGigE::transmit()
}
DPRINTF(Ethernet, "Attempt Pkt Transmit: txFifo length=%d\n",
- maxTxFifoSize - txFifoAvail);
+ txFifo.size());
if (interface->sendPacket(txFifo.front())) {
#if TRACING_ON
if (DTRACE(Ethernet)) {
@@ -1556,12 +1552,9 @@ NSGigE::transmit()
txBytes += txFifo.front()->length;
txPackets++;
- txFifoAvail += txFifo.front()->length;
-
DPRINTF(Ethernet, "Successful Xmit! now txFifoAvail is %d\n",
- txFifoAvail);
- txFifo.front() = NULL;
- txFifo.pop_front();
+ txFifo.avail());
+ txFifo.pop();
/*
* normally do a writeback of the descriptor here, and ONLY
@@ -1829,7 +1822,7 @@ NSGigE::txKick()
// this is just because the receive can't handle a
// packet bigger want to make sure
assert(txPacket->length <= 1514);
- txFifo.push_back(txPacket);
+ txFifo.push(txPacket);
/*
* this following section is not tqo spec, but
@@ -1875,7 +1868,7 @@ NSGigE::txKick()
}
} else {
DPRINTF(EthernetSM, "this descriptor isn't done yet\n");
- if (txFifoAvail) {
+ if (!txFifo.full()) {
txState = txFragRead;
/*
@@ -1884,7 +1877,7 @@ NSGigE::txKick()
* is not enough room in the fifo, just whatever room
* is left in the fifo
*/
- txXferLen = min<uint32_t>(txDescCnt, txFifoAvail);
+ txXferLen = min<uint32_t>(txDescCnt, txFifo.avail());
txDmaAddr = txFragPtr & 0x3fffffff;
txDmaData = txPacketBufPtr;
@@ -1910,7 +1903,6 @@ NSGigE::txKick()
txPacketBufPtr += txXferLen;
txFragPtr += txXferLen;
txDescCnt -= txXferLen;
- txFifoAvail -= txXferLen;
txState = txFifoBlock;
break;
@@ -2025,7 +2017,7 @@ NSGigE::recvPacket(PacketPtr packet)
rxPackets++;
DPRINTF(Ethernet, "Receiving packet from wire, rxFifoAvail=%d\n",
- maxRxFifoSize - rxFifoCnt);
+ rxFifo.avail());
if (!rxEnable) {
DPRINTF(Ethernet, "receive disabled...packet dropped\n");
@@ -2040,15 +2032,14 @@ NSGigE::recvPacket(PacketPtr packet)
return true;
}
- if ((rxFifoCnt + packet->length) >= maxRxFifoSize) {
+ if (rxFifo.avail() < packet->length) {
DPRINTF(Ethernet,
"packet will not fit in receive buffer...packet dropped\n");
devIntrPost(ISR_RXORN);
return false;
}
- rxFifo.push_back(packet);
- rxFifoCnt += packet->length;
+ rxFifo.push(packet);
interface->recvDone();
rxKick();
@@ -2119,19 +2110,8 @@ NSGigE::serialize(ostream &os)
/*
* Serialize the data Fifos
*/
- int txNumPkts = txFifo.size();
- SERIALIZE_SCALAR(txNumPkts);
- int i = 0;
- pktiter_t end = txFifo.end();
- for (pktiter_t p = txFifo.begin(); p != end; ++p)
- (*p)->serialize(csprintf("txFifo%d", i++), os);
-
- int rxNumPkts = rxFifo.size();
- SERIALIZE_SCALAR(rxNumPkts);
- i = 0;
- end = rxFifo.end();
- for (pktiter_t p = rxFifo.begin(); p != end; ++p)
- (*p)->serialize(csprintf("rxFifo%d", i++), os);
+ rxFifo.serialize("rxFifo", os);
+ txFifo.serialize("txFifo", os);
/*
* Serialize the various helper variables
@@ -2174,7 +2154,6 @@ NSGigE::serialize(ostream &os)
SERIALIZE_SCALAR(txState);
SERIALIZE_SCALAR(txEnable);
SERIALIZE_SCALAR(CTDD);
- SERIALIZE_SCALAR(txFifoAvail);
SERIALIZE_SCALAR(txFragPtr);
SERIALIZE_SCALAR(txDescCnt);
int txDmaState = this->txDmaState;
@@ -2188,7 +2167,6 @@ NSGigE::serialize(ostream &os)
SERIALIZE_SCALAR(rxEnable);
SERIALIZE_SCALAR(CRDD);
SERIALIZE_SCALAR(rxPktBytes);
- SERIALIZE_SCALAR(rxFifoCnt);
SERIALIZE_SCALAR(rxDescCnt);
int rxDmaState = this->rxDmaState;
SERIALIZE_SCALAR(rxDmaState);
@@ -2270,22 +2248,8 @@ NSGigE::unserialize(Checkpoint *cp, const std::string &section)
/*
* unserialize the data fifos
*/
- int txNumPkts;
- UNSERIALIZE_SCALAR(txNumPkts);
- int i;
- for (i = 0; i < txNumPkts; ++i) {
- PacketPtr p = new PacketData;
- p->unserialize(csprintf("rxFifo%d", i), cp, section);
- txFifo.push_back(p);
- }
-
- int rxNumPkts;
- UNSERIALIZE_SCALAR(rxNumPkts);
- for (i = 0; i < rxNumPkts; ++i) {
- PacketPtr p = new PacketData;
- p->unserialize(csprintf("rxFifo%d", i), cp, section);
- rxFifo.push_back(p);
- }
+ rxFifo.unserialize("rxFifo", cp, section);
+ txFifo.unserialize("txFifo", cp, section);
/*
* unserialize the various helper variables
@@ -2336,7 +2300,6 @@ NSGigE::unserialize(Checkpoint *cp, const std::string &section)
this->txState = (TxState) txState;
UNSERIALIZE_SCALAR(txEnable);
UNSERIALIZE_SCALAR(CTDD);
- UNSERIALIZE_SCALAR(txFifoAvail);
UNSERIALIZE_SCALAR(txFragPtr);
UNSERIALIZE_SCALAR(txDescCnt);
int txDmaState;
@@ -2352,7 +2315,6 @@ NSGigE::unserialize(Checkpoint *cp, const std::string &section)
UNSERIALIZE_SCALAR(rxEnable);
UNSERIALIZE_SCALAR(CRDD);
UNSERIALIZE_SCALAR(rxPktBytes);
- UNSERIALIZE_SCALAR(rxFifoCnt);
UNSERIALIZE_SCALAR(rxDescCnt);
int rxDmaState;
UNSERIALIZE_SCALAR(rxDmaState);
diff --git a/dev/ns_gige.hh b/dev/ns_gige.hh
index fc2c88a6c..90711d63f 100644
--- a/dev/ns_gige.hh
+++ b/dev/ns_gige.hh
@@ -41,6 +41,7 @@
#include "dev/io_device.hh"
#include "dev/ns_gige_reg.h"
#include "dev/pcidev.hh"
+#include "dev/pktfifo.hh"
#include "mem/bus/bus.hh"
#include "sim/eventq.hh"
@@ -158,10 +159,8 @@ class NSGigE : public PciDev
/*** BASIC STRUCTURES FOR TX/RX ***/
/* Data FIFOs */
- pktbuf_t txFifo;
- uint32_t maxTxFifoSize;
- pktbuf_t rxFifo;
- uint32_t maxRxFifoSize;
+ PacketFifo txFifo;
+ PacketFifo rxFifo;
/** various helper vars */
PacketPtr txPacket;
@@ -183,8 +182,6 @@ class NSGigE : public PciDev
/** Current Transmit Descriptor Done */
bool CTDD;
- /** current amt of free space in txDataFifo in bytes */
- uint32_t txFifoAvail;
/** halt the tx state machine after next packet */
bool txHalt;
/** ptr to the next byte in the current fragment */
@@ -201,8 +198,6 @@ class NSGigE : public PciDev
bool CRDD;
/** num of bytes in the current packet being drained from rxDataFifo */
uint32_t rxPktBytes;
- /** number of bytes in the rxFifo */
- uint32_t rxFifoCnt;
/** halt the rx state machine after current packet */
bool rxHalt;
/** ptr to the next byte in current fragment */
diff --git a/dev/pktfifo.cc b/dev/pktfifo.cc
new file mode 100644
index 000000000..cf09ae910
--- /dev/null
+++ b/dev/pktfifo.cc
@@ -0,0 +1,68 @@
+/*
+ * Copyright (c) 2002-2004 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.
+ */
+
+#include "base/misc.hh"
+#include "dev/pktfifo.hh"
+
+using namespace std;
+
+void
+PacketFifo::serialize(const string &base, ostream &os)
+{
+ paramOut(os, base + ".size", _size);
+ paramOut(os, base + ".maxsize", _maxsize);
+ paramOut(os, base + ".packets", fifo.size());
+
+ int i = 0;
+ std::list<PacketPtr>::iterator p = fifo.begin();
+ std::list<PacketPtr>::iterator end = fifo.end();
+ while (p != end) {
+ (*p)->serialize(csprintf("%s.packet%d", base, i), os);
+ ++p;
+ ++i;
+ }
+}
+
+void
+PacketFifo::unserialize(const string &base, Checkpoint *cp,
+ const string &section)
+{
+ paramIn(cp, section, base + ".size", _size);
+ paramIn(cp, section, base + ".maxsize", _maxsize);
+ int fifosize;
+ paramIn(cp, section, base + ".packets", fifosize);
+
+ fifo.clear();
+ fifo.resize(fifosize);
+
+ for (int i = 0; i < fifosize; ++i) {
+ PacketPtr p = new PacketData;
+ p->unserialize(csprintf("%s.packet%d", base, i), cp, section);
+ fifo.push_back(p);
+ }
+}
diff --git a/dev/pktfifo.hh b/dev/pktfifo.hh
new file mode 100644
index 000000000..a54a49996
--- /dev/null
+++ b/dev/pktfifo.hh
@@ -0,0 +1,95 @@
+/*
+ * Copyright (c) 2002-2004 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.
+ */
+
+#ifndef __DEV_PKTFIFO_HH__
+#define __DEV_PKTFIFO_HH__
+
+#include <iosfwd>
+#include <list>
+#include <string>
+
+#include "dev/etherpkt.hh"
+#include "sim/serialize.hh"
+
+class Checkpoint;
+class PacketFifo
+{
+ protected:
+ std::list<PacketPtr> fifo;
+ int _maxsize;
+ int _size;
+
+ public:
+ explicit PacketFifo(int max) : _maxsize(max), _size(0) {}
+ virtual ~PacketFifo() {}
+
+ int maxsize() const { return _maxsize; }
+ int packets() const { return fifo.size(); }
+ int size() const { return _size; }
+ int avail() const { return _maxsize - _size; }
+ bool empty() const { return _size == 0; }
+ bool full() const { return _size >= _maxsize; }
+
+ bool push(PacketPtr ptr)
+ {
+ if (avail() < ptr->length)
+ return false;
+
+ _size += ptr->length;
+ fifo.push_back(ptr);
+ return true;
+ }
+
+ PacketPtr front() { return fifo.front(); }
+
+ void pop()
+ {
+ if (empty())
+ return;
+
+ _size -= fifo.front()->length;
+ fifo.front() = NULL;
+ fifo.pop_front();
+ }
+
+ void clear()
+ {
+ fifo.clear();
+ _size = 0;
+ }
+
+/**
+ * Serialization stuff
+ */
+ public:
+ void serialize(const std::string &base, std::ostream &os);
+ void unserialize(const std::string &base,
+ Checkpoint *cp, const std::string &section);
+};
+
+#endif // __DEV_PKTFIFO_HH__
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