src/dev/net/sinic.hh - public/gem5 - Git at Google

 /*
  * 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.
  */

 #ifndef __DEV_NET_SINIC_HH__
 #define __DEV_NET_SINIC_HH__

 #include "base/inet.hh"
 #include "base/statistics.hh"
 #include "dev/io_device.hh"
 #include "dev/net/etherdevice.hh"
 #include "dev/net/etherint.hh"
 #include "dev/net/etherpkt.hh"
 #include "dev/net/pktfifo.hh"
 #include "dev/net/sinicreg.hh"
 #include "dev/pci/device.hh"
 #include "params/Sinic.hh"
 #include "sim/eventq.hh"

 namespace Sinic {

 class Interface;
 class Base : public EtherDevBase
 {
   protected:
     bool rxEnable;
     bool txEnable;

   protected:
     Tick intrDelay;
     Tick intrTick;
     bool cpuIntrEnable;
     bool cpuPendingIntr;
     void cpuIntrPost(Tick when);
     void cpuInterrupt();
     void cpuIntrClear();

     EventFunctionWrapper *intrEvent;
     Interface *interface;

     bool cpuIntrPending() const;
     void cpuIntrAck() { cpuIntrClear(); }

 /**
  * Serialization stuff
  */
   public:
     void serialize(CheckpointOut &cp) const override;
     void unserialize(CheckpointIn &cp) override;

 /**
  * Construction/Destruction/Parameters
  */
   public:
     typedef SinicParams Params;
     const Params *params() const { return (const Params *)_params; }
     Base(const Params *p);
 };

 class Device : public Base
 {
   protected:
     /** Receive State Machine States */
     enum RxState {
         rxIdle,
         rxFifoBlock,
         rxBeginCopy,
         rxCopy,
         rxCopyDone
     };

     /** Transmit State Machine states */
     enum TxState {
         txIdle,
         txFifoBlock,
         txBeginCopy,
         txCopy,
         txCopyDone
     };

     /** device register file */
     struct {
         uint32_t Config;       // 0x00
         uint32_t Command;      // 0x04
         uint32_t IntrStatus;   // 0x08
         uint32_t IntrMask;     // 0x0c
         uint32_t RxMaxCopy;    // 0x10
         uint32_t TxMaxCopy;    // 0x14
         uint32_t ZeroCopySize; // 0x18
         uint32_t ZeroCopyMark; // 0x1c
         uint32_t VirtualCount; // 0x20
         uint32_t RxMaxIntr;    // 0x24
         uint32_t RxFifoSize;   // 0x28
         uint32_t TxFifoSize;   // 0x2c
         uint32_t RxFifoLow;    // 0x30
         uint32_t TxFifoLow;    // 0x34
         uint32_t RxFifoHigh;   // 0x38
         uint32_t TxFifoHigh;   // 0x3c
         uint64_t RxData;       // 0x40
         uint64_t RxDone;       // 0x48
         uint64_t RxWait;       // 0x50
         uint64_t TxData;       // 0x58
         uint64_t TxDone;       // 0x60
         uint64_t TxWait;       // 0x68
         uint64_t HwAddr;       // 0x70
         uint64_t RxStatus;     // 0x78
     } regs;

     struct VirtualReg {
         uint64_t RxData;
         uint64_t RxDone;
         uint64_t TxData;
         uint64_t TxDone;

         PacketFifo::iterator rxIndex;
         unsigned rxPacketOffset;
         unsigned rxPacketBytes;
         uint64_t rxDoneData;

         Counter rxUnique;
         Counter txUnique;

         VirtualReg()
             : RxData(0), RxDone(0), TxData(0), TxDone(0),
               rxPacketOffset(0), rxPacketBytes(0), rxDoneData(0)
         { }
     };
     typedef std::vector<VirtualReg> VirtualRegs;
     typedef std::list<unsigned> VirtualList;
     Counter rxUnique;
     Counter txUnique;
     VirtualRegs virtualRegs;
     VirtualList rxList;
     VirtualList rxBusy;
     int rxActive;
     VirtualList txList;

     int rxBusyCount;
     int rxMappedCount;
     int rxDirtyCount;

     uint8_t  &regData8(Addr daddr) { return *((uint8_t *)&regs + daddr); }
     uint32_t &regData32(Addr daddr) { return *(uint32_t *)&regData8(daddr); }
     uint64_t &regData64(Addr daddr) { return *(uint64_t *)&regData8(daddr); }

   protected:
     RxState rxState;
     PacketFifo rxFifo;
     PacketFifo::iterator rxFifoPtr;
     bool rxEmpty;
     bool rxLow;
     Addr rxDmaAddr;
     uint8_t *rxDmaData;
     unsigned rxDmaLen;

     TxState txState;
     PacketFifo txFifo;
     bool txFull;
     EthPacketPtr txPacket;
     int txPacketOffset;
     int txPacketBytes;
     Addr txDmaAddr;
     uint8_t *txDmaData;
     int txDmaLen;

   protected:
     void reset();

     void rxKick();
     Tick rxKickTick;

     void txKick();
     Tick txKickTick;

     /**
      * Retransmit event
      */
     void transmit();
     void txEventTransmit()
     {
         transmit();
         if (txState == txFifoBlock)
             txKick();
     }
     EventFunctionWrapper txEvent;

     void txDump() const;
     void rxDump() const;

     /**
      * receive address filter
      */
     bool rxFilter(const EthPacketPtr &packet);

 /**
  * device configuration
  */
     void changeConfig(uint32_t newconfig);
     void command(uint32_t command);

 /**
  * device ethernet interface
  */
   public:
     bool recvPacket(EthPacketPtr packet);
     void transferDone();
     Port &getPort(const std::string &if_name,
                   PortID idx=InvalidPortID) override;

 /**
  * DMA parameters
  */
   protected:
     void rxDmaDone();
     EventFunctionWrapper rxDmaEvent;

     void txDmaDone();
     EventFunctionWrapper txDmaEvent;

     Tick dmaReadDelay;
     Tick dmaReadFactor;
     Tick dmaWriteDelay;
     Tick dmaWriteFactor;

 /**
  * Interrupt management
  */
   protected:
     void devIntrPost(uint32_t interrupts);
     void devIntrClear(uint32_t interrupts = Regs::Intr_All);
     void devIntrChangeMask(uint32_t newmask);

 /**
  * Memory Interface
  */
   public:
     Tick read(PacketPtr pkt) override;
     Tick write(PacketPtr pkt) override;
     virtual void drainResume() override;

     void prepareIO(ContextID cpu, int index);
     void prepareRead(ContextID cpu, int index);
     void prepareWrite(ContextID cpu, int index);
  //   Fault iprRead(Addr daddr, ContextID cpu, uint64_t &result);

 /**
  * Statistics
  */
   private:
     Stats::Scalar totalVnicDistance;
     Stats::Scalar numVnicDistance;
     Stats::Scalar maxVnicDistance;
     Stats::Formula avgVnicDistance;

     int _maxVnicDistance;

   public:
     void regStats() override;
     void resetStats() override;

 /**
  * Serialization stuff
  */
   public:
     void serialize(CheckpointOut &cp) const override;
     void unserialize(CheckpointIn &cp) override;

   public:
     Device(const Params *p);
     ~Device();
 };

 /*
  * Ethernet Interface for an Ethernet Device
  */
 class Interface : public EtherInt
 {
   private:
     Device *dev;

   public:
     Interface(const std::string &name, Device *d)
         : EtherInt(name), dev(d)
     { }

     virtual bool recvPacket(EthPacketPtr pkt) { return dev->recvPacket(pkt); }
     virtual void sendDone() { dev->transferDone(); }
 };

 } // namespace Sinic

 #endif // __DEV_NET_SINIC_HH__
	/*
	* 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.
	*/

	#ifndef __DEV_NET_SINIC_HH__
	#define __DEV_NET_SINIC_HH__

	#include "base/inet.hh"
	#include "base/statistics.hh"
	#include "dev/io_device.hh"
	#include "dev/net/etherdevice.hh"
	#include "dev/net/etherint.hh"
	#include "dev/net/etherpkt.hh"
	#include "dev/net/pktfifo.hh"
	#include "dev/net/sinicreg.hh"
	#include "dev/pci/device.hh"
	#include "params/Sinic.hh"
	#include "sim/eventq.hh"

	namespace Sinic {

	class Interface;
	class Base : public EtherDevBase
	{
	protected:
	bool rxEnable;
	bool txEnable;

	protected:
	Tick intrDelay;
	Tick intrTick;
	bool cpuIntrEnable;
	bool cpuPendingIntr;
	void cpuIntrPost(Tick when);
	void cpuInterrupt();
	void cpuIntrClear();

	EventFunctionWrapper *intrEvent;
	Interface *interface;

	bool cpuIntrPending() const;
	void cpuIntrAck() { cpuIntrClear(); }

	/**
	* Serialization stuff
	*/
	public:
	void serialize(CheckpointOut &cp) const override;
	void unserialize(CheckpointIn &cp) override;

	/**
	* Construction/Destruction/Parameters
	*/
	public:
	typedef SinicParams Params;
	const Params params() const { return (const Params )_params; }
	Base(const Params *p);
	};

	class Device : public Base
	{
	protected:
	/** Receive State Machine States */
	enum RxState {
	rxIdle,
	rxFifoBlock,
	rxBeginCopy,
	rxCopy,
	rxCopyDone
	};

	/** Transmit State Machine states */
	enum TxState {
	txIdle,
	txFifoBlock,
	txBeginCopy,
	txCopy,
	txCopyDone
	};

	/** device register file */
	struct {
	uint32_t Config; // 0x00
	uint32_t Command; // 0x04
	uint32_t IntrStatus; // 0x08
	uint32_t IntrMask; // 0x0c
	uint32_t RxMaxCopy; // 0x10
	uint32_t TxMaxCopy; // 0x14
	uint32_t ZeroCopySize; // 0x18
	uint32_t ZeroCopyMark; // 0x1c
	uint32_t VirtualCount; // 0x20
	uint32_t RxMaxIntr; // 0x24
	uint32_t RxFifoSize; // 0x28
	uint32_t TxFifoSize; // 0x2c
	uint32_t RxFifoLow; // 0x30
	uint32_t TxFifoLow; // 0x34
	uint32_t RxFifoHigh; // 0x38
	uint32_t TxFifoHigh; // 0x3c
	uint64_t RxData; // 0x40
	uint64_t RxDone; // 0x48
	uint64_t RxWait; // 0x50
	uint64_t TxData; // 0x58
	uint64_t TxDone; // 0x60
	uint64_t TxWait; // 0x68
	uint64_t HwAddr; // 0x70
	uint64_t RxStatus; // 0x78
	} regs;

	struct VirtualReg {
	uint64_t RxData;
	uint64_t RxDone;
	uint64_t TxData;
	uint64_t TxDone;

	PacketFifo::iterator rxIndex;
	unsigned rxPacketOffset;
	unsigned rxPacketBytes;
	uint64_t rxDoneData;

	Counter rxUnique;
	Counter txUnique;

	VirtualReg()
	: RxData(0), RxDone(0), TxData(0), TxDone(0),
	rxPacketOffset(0), rxPacketBytes(0), rxDoneData(0)
	{ }
	};
	typedef std::vector<VirtualReg> VirtualRegs;
	typedef std::list<unsigned> VirtualList;
	Counter rxUnique;
	Counter txUnique;
	VirtualRegs virtualRegs;
	VirtualList rxList;
	VirtualList rxBusy;
	int rxActive;
	VirtualList txList;

	int rxBusyCount;
	int rxMappedCount;
	int rxDirtyCount;

	uint8_t &regData8(Addr daddr) { return ((uint8_t )&regs + daddr); }
	uint32_t &regData32(Addr daddr) { return (uint32_t )&regData8(daddr); }
	uint64_t &regData64(Addr daddr) { return (uint64_t )&regData8(daddr); }

	protected:
	RxState rxState;
	PacketFifo rxFifo;
	PacketFifo::iterator rxFifoPtr;
	bool rxEmpty;
	bool rxLow;
	Addr rxDmaAddr;
	uint8_t *rxDmaData;
	unsigned rxDmaLen;

	TxState txState;
	PacketFifo txFifo;
	bool txFull;
	EthPacketPtr txPacket;
	int txPacketOffset;
	int txPacketBytes;
	Addr txDmaAddr;
	uint8_t *txDmaData;
	int txDmaLen;

	protected:
	void reset();

	void rxKick();
	Tick rxKickTick;

	void txKick();
	Tick txKickTick;

	/**
	* Retransmit event
	*/
	void transmit();
	void txEventTransmit()
	{
	transmit();
	if (txState == txFifoBlock)
	txKick();
	}
	EventFunctionWrapper txEvent;

	void txDump() const;
	void rxDump() const;

	/**
	* receive address filter
	*/
	bool rxFilter(const EthPacketPtr &packet);

	/**
	* device configuration
	*/
	void changeConfig(uint32_t newconfig);
	void command(uint32_t command);

	/**
	* device ethernet interface
	*/
	public:
	bool recvPacket(EthPacketPtr packet);
	void transferDone();
	Port &getPort(const std::string &if_name,
	PortID idx=InvalidPortID) override;

	/**
	* DMA parameters
	*/
	protected:
	void rxDmaDone();
	EventFunctionWrapper rxDmaEvent;

	void txDmaDone();
	EventFunctionWrapper txDmaEvent;

	Tick dmaReadDelay;
	Tick dmaReadFactor;
	Tick dmaWriteDelay;
	Tick dmaWriteFactor;

	/**
	* Interrupt management
	*/
	protected:
	void devIntrPost(uint32_t interrupts);
	void devIntrClear(uint32_t interrupts = Regs::Intr_All);
	void devIntrChangeMask(uint32_t newmask);

	/**
	* Memory Interface
	*/
	public:
	Tick read(PacketPtr pkt) override;
	Tick write(PacketPtr pkt) override;
	virtual void drainResume() override;

	void prepareIO(ContextID cpu, int index);
	void prepareRead(ContextID cpu, int index);
	void prepareWrite(ContextID cpu, int index);
	// Fault iprRead(Addr daddr, ContextID cpu, uint64_t &result);

	/**
	* Statistics
	*/
	private:
	Stats::Scalar totalVnicDistance;
	Stats::Scalar numVnicDistance;
	Stats::Scalar maxVnicDistance;
	Stats::Formula avgVnicDistance;

	int _maxVnicDistance;

	public:
	void regStats() override;
	void resetStats() override;

	/**
	* Serialization stuff
	*/
	public:
	void serialize(CheckpointOut &cp) const override;
	void unserialize(CheckpointIn &cp) override;

	public:
	Device(const Params *p);
	~Device();
	};

	/*
	* Ethernet Interface for an Ethernet Device
	*/
	class Interface : public EtherInt
	{
	private:
	Device *dev;

	public:
	Interface(const std::string &name, Device *d)
	: EtherInt(name), dev(d)
	{ }

	virtual bool recvPacket(EthPacketPtr pkt) { return dev->recvPacket(pkt); }
	virtual void sendDone() { dev->transferDone(); }
	};

	} // namespace Sinic

	#endif // __DEV_NET_SINIC_HH__