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gem5/dev/ns_gige.hh
Nathan Binkert 7546fabe68 Ethernet devices have an RSS option to tell the driver to 
use Receive side scaling

dev/ns_gige.cc:
dev/ns_gige.hh:
dev/ns_gige_reg.h:
dev/sinic.cc:
dev/sinic.hh:
dev/sinicreg.hh:
    add support for setting the RSS flag to notify the driver
    to use RSS

--HG--
extra : convert_revision : 5f0c11668ae976634b3bf0caad669a9464a4c041
2006-03-03 14:17:48 -05:00

487 lines
12 KiB
C++
Raw Blame History

/*
* Copyright (c) 2004-2005 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 the National Semiconductor
* DP83820 ethernet controller
*/
#ifndef __DEV_NS_GIGE_HH__
#define __DEV_NS_GIGE_HH__
#include "base/inet.hh"
#include "base/statistics.hh"
#include "dev/etherint.hh"
#include "dev/etherpkt.hh"
#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"
// Hash filtering constants
const uint16_t FHASH_ADDR = 0x100;
const uint16_t FHASH_SIZE = 0x100;
// EEPROM constants
const uint8_t EEPROM_READ = 0x2;
const uint8_t EEPROM_SIZE = 64; // Size in words of NSC93C46 EEPROM
const uint8_t EEPROM_PMATCH2_ADDR = 0xA; // EEPROM Address of PMATCH word 2
const uint8_t EEPROM_PMATCH1_ADDR = 0xB; // EEPROM Address of PMATCH word 1
const uint8_t EEPROM_PMATCH0_ADDR = 0xC; // EEPROM Address of PMATCH word 0
/**
* Ethernet device registers
*/
struct dp_regs {
uint32_t command;
uint32_t config;
uint32_t mear;
uint32_t ptscr;
uint32_t isr;
uint32_t imr;
uint32_t ier;
uint32_t ihr;
uint32_t txdp;
uint32_t txdp_hi;
uint32_t txcfg;
uint32_t gpior;
uint32_t rxdp;
uint32_t rxdp_hi;
uint32_t rxcfg;
uint32_t pqcr;
uint32_t wcsr;
uint32_t pcr;
uint32_t rfcr;
uint32_t rfdr;
uint32_t brar;
uint32_t brdr;
uint32_t srr;
uint32_t mibc;
uint32_t vrcr;
uint32_t vtcr;
uint32_t vdr;
uint32_t ccsr;
uint32_t tbicr;
uint32_t tbisr;
uint32_t tanar;
uint32_t tanlpar;
uint32_t taner;
uint32_t tesr;
};
struct dp_rom {
/**
* for perfect match memory.
* the linux driver doesn't use any other ROM
*/
uint8_t perfectMatch[ETH_ADDR_LEN];
/**
* for hash table memory.
* used by the freebsd driver
*/
uint8_t filterHash[FHASH_SIZE];
};
class NSGigEInt;
class PhysicalMemory;
class BaseInterface;
class HierParams;
class Bus;
class PciConfigAll;
/**
* NS DP83820 Ethernet device model
*/
class NSGigE : public PciDev
{
public:
/** Transmit State Machine states */
enum TxState
{
txIdle,
txDescRefr,
txDescRead,
txFifoBlock,
txFragRead,
txDescWrite,
txAdvance
};
/** Receive State Machine States */
enum RxState
{
rxIdle,
rxDescRefr,
rxDescRead,
rxFifoBlock,
rxFragWrite,
rxDescWrite,
rxAdvance
};
enum DmaState
{
dmaIdle,
dmaReading,
dmaWriting,
dmaReadWaiting,
dmaWriteWaiting
};
/** EEPROM State Machine States */
enum EEPROMState
{
eepromStart,
eepromGetOpcode,
eepromGetAddress,
eepromRead
};
private:
Addr addr;
static const Addr size = sizeof(dp_regs);
protected:
/** device register file */
dp_regs regs;
dp_rom rom;
/** pci settings */
bool ioEnable;
#if 0
bool memEnable;
bool bmEnable;
#endif
/*** BASIC STRUCTURES FOR TX/RX ***/
/* Data FIFOs */
PacketFifo txFifo;
PacketFifo rxFifo;
/** various helper vars */
PacketPtr txPacket;
PacketPtr rxPacket;
uint8_t *txPacketBufPtr;
uint8_t *rxPacketBufPtr;
uint32_t txXferLen;
uint32_t rxXferLen;
bool rxDmaFree;
bool txDmaFree;
/** DescCaches */
ns_desc32 txDesc32;
ns_desc32 rxDesc32;
ns_desc64 txDesc64;
ns_desc64 rxDesc64;
/* state machine cycle time */
Tick clock;
inline Tick cycles(int numCycles) const { return numCycles * clock; }
/* tx State Machine */
TxState txState;
bool txEnable;
/** Current Transmit Descriptor Done */
bool CTDD;
/** halt the tx state machine after next packet */
bool txHalt;
/** ptr to the next byte in the current fragment */
Addr txFragPtr;
/** count of bytes remaining in the current descriptor */
uint32_t txDescCnt;
DmaState txDmaState;
/** rx State Machine */
RxState rxState;
bool rxEnable;
/** Current Receive Descriptor Done */
bool CRDD;
/** num of bytes in the current packet being drained from rxDataFifo */
uint32_t rxPktBytes;
/** halt the rx state machine after current packet */
bool rxHalt;
/** ptr to the next byte in current fragment */
Addr rxFragPtr;
/** count of bytes remaining in the current descriptor */
uint32_t rxDescCnt;
DmaState rxDmaState;
bool extstsEnable;
/** EEPROM State Machine */
EEPROMState eepromState;
bool eepromClk;
uint8_t eepromBitsToRx;
uint8_t eepromOpcode;
uint8_t eepromAddress;
uint16_t eepromData;
protected:
Tick dmaReadDelay;
Tick dmaWriteDelay;
Tick dmaReadFactor;
Tick dmaWriteFactor;
void *rxDmaData;
Addr rxDmaAddr;
int rxDmaLen;
bool doRxDmaRead();
bool doRxDmaWrite();
void rxDmaReadCopy();
void rxDmaWriteCopy();
void *txDmaData;
Addr txDmaAddr;
int txDmaLen;
bool doTxDmaRead();
bool doTxDmaWrite();
void txDmaReadCopy();
void txDmaWriteCopy();
void rxDmaReadDone();
friend class EventWrapper<NSGigE, &NSGigE::rxDmaReadDone>;
EventWrapper<NSGigE, &NSGigE::rxDmaReadDone> rxDmaReadEvent;
void rxDmaWriteDone();
friend class EventWrapper<NSGigE, &NSGigE::rxDmaWriteDone>;
EventWrapper<NSGigE, &NSGigE::rxDmaWriteDone> rxDmaWriteEvent;
void txDmaReadDone();
friend class EventWrapper<NSGigE, &NSGigE::txDmaReadDone>;
EventWrapper<NSGigE, &NSGigE::txDmaReadDone> txDmaReadEvent;
void txDmaWriteDone();
friend class EventWrapper<NSGigE, &NSGigE::txDmaWriteDone>;
EventWrapper<NSGigE, &NSGigE::txDmaWriteDone> txDmaWriteEvent;
bool dmaDescFree;
bool dmaDataFree;
protected:
Tick txDelay;
Tick rxDelay;
void txReset();
void rxReset();
void regsReset();
void rxKick();
Tick rxKickTick;
typedef EventWrapper<NSGigE, &NSGigE::rxKick> RxKickEvent;
friend void RxKickEvent::process();
RxKickEvent rxKickEvent;
void txKick();
Tick txKickTick;
typedef EventWrapper<NSGigE, &NSGigE::txKick> TxKickEvent;
friend void TxKickEvent::process();
TxKickEvent txKickEvent;
void eepromKick();
/**
* Retransmit event
*/
void transmit();
void txEventTransmit()
{
transmit();
if (txState == txFifoBlock)
txKick();
}
typedef EventWrapper<NSGigE, &NSGigE::txEventTransmit> TxEvent;
friend void TxEvent::process();
TxEvent txEvent;
void txDump() const;
void rxDump() const;
/**
* receive address filter
*/
bool rxFilterEnable;
bool rxFilter(const PacketPtr &packet);
bool acceptBroadcast;
bool acceptMulticast;
bool acceptUnicast;
bool acceptPerfect;
bool acceptArp;
bool multicastHashEnable;
PhysicalMemory *physmem;
/**
* Interrupt management
*/
void devIntrPost(uint32_t interrupts);
void devIntrClear(uint32_t interrupts);
void devIntrChangeMask();
Tick intrDelay;
Tick intrTick;
bool cpuPendingIntr;
void cpuIntrPost(Tick when);
void cpuInterrupt();
void cpuIntrClear();
typedef EventWrapper<NSGigE, &NSGigE::cpuInterrupt> IntrEvent;
friend void IntrEvent::process();
IntrEvent *intrEvent;
NSGigEInt *interface;
public:
struct Params : public PciDev::Params
{
PhysicalMemory *pmem;
HierParams *hier;
Bus *pio_bus;
Bus *header_bus;
Bus *payload_bus;
Tick clock;
Tick intr_delay;
Tick tx_delay;
Tick rx_delay;
Tick pio_latency;
bool dma_desc_free;
bool dma_data_free;
Tick dma_read_delay;
Tick dma_write_delay;
Tick dma_read_factor;
Tick dma_write_factor;
bool rx_filter;
Net::EthAddr eaddr;
uint32_t tx_fifo_size;
uint32_t rx_fifo_size;
bool rx_thread;
bool tx_thread;
bool rss;
bool dma_no_allocate;
};
NSGigE(Params *params);
~NSGigE();
const Params *params() const { return (const Params *)_params; }
virtual void writeConfig(int offset, int size, const uint8_t *data);
virtual void readConfig(int offset, int size, uint8_t *data);
virtual Fault read(MemReqPtr &req, uint8_t *data);
virtual Fault write(MemReqPtr &req, const uint8_t *data);
bool cpuIntrPending() const;
void cpuIntrAck() { cpuIntrClear(); }
bool recvPacket(PacketPtr packet);
void transferDone();
void setInterface(NSGigEInt *i) { assert(!interface); interface = i; }
virtual void serialize(std::ostream &os);
virtual void unserialize(Checkpoint *cp, const std::string &section);
public:
void regStats();
private:
Stats::Scalar<> txBytes;
Stats::Scalar<> rxBytes;
Stats::Scalar<> txPackets;
Stats::Scalar<> rxPackets;
Stats::Scalar<> txIpChecksums;
Stats::Scalar<> rxIpChecksums;
Stats::Scalar<> txTcpChecksums;
Stats::Scalar<> rxTcpChecksums;
Stats::Scalar<> txUdpChecksums;
Stats::Scalar<> rxUdpChecksums;
Stats::Scalar<> descDmaReads;
Stats::Scalar<> descDmaWrites;
Stats::Scalar<> descDmaRdBytes;
Stats::Scalar<> descDmaWrBytes;
Stats::Formula totBandwidth;
Stats::Formula totPackets;
Stats::Formula totBytes;
Stats::Formula totPacketRate;
Stats::Formula txBandwidth;
Stats::Formula rxBandwidth;
Stats::Formula txPacketRate;
Stats::Formula rxPacketRate;
Stats::Scalar<> postedSwi;
Stats::Formula coalescedSwi;
Stats::Scalar<> totalSwi;
Stats::Scalar<> postedRxIdle;
Stats::Formula coalescedRxIdle;
Stats::Scalar<> totalRxIdle;
Stats::Scalar<> postedRxOk;
Stats::Formula coalescedRxOk;
Stats::Scalar<> totalRxOk;
Stats::Scalar<> postedRxDesc;
Stats::Formula coalescedRxDesc;
Stats::Scalar<> totalRxDesc;
Stats::Scalar<> postedTxOk;
Stats::Formula coalescedTxOk;
Stats::Scalar<> totalTxOk;
Stats::Scalar<> postedTxIdle;
Stats::Formula coalescedTxIdle;
Stats::Scalar<> totalTxIdle;
Stats::Scalar<> postedTxDesc;
Stats::Formula coalescedTxDesc;
Stats::Scalar<> totalTxDesc;
Stats::Scalar<> postedRxOrn;
Stats::Formula coalescedRxOrn;
Stats::Scalar<> totalRxOrn;
Stats::Formula coalescedTotal;
Stats::Scalar<> postedInterrupts;
Stats::Scalar<> droppedPackets;
public:
Tick cacheAccess(MemReqPtr &req);
};
/*
* Ethernet Interface for an Ethernet Device
*/
class NSGigEInt : public EtherInt
{
private:
NSGigE *dev;
public:
NSGigEInt(const std::string &name, NSGigE *d)
: EtherInt(name), dev(d) { dev->setInterface(this); }
virtual bool recvPacket(PacketPtr pkt) { return dev->recvPacket(pkt); }
virtual void sendDone() { dev->transferDone(); }
};
#endif // __DEV_NS_GIGE_HH__
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