comm.hh

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/*
 * Copyright (c) 2018 Advanced Micro Devices, Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.
 *
 * 2. 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.
 *
 * 3. Neither the name of the copyright holder 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 HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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 */
 
#ifndef __GPU_COMPUTE_COMM_HH__
#define __GPU_COMPUTE_COMM_HH__
 
#include <array>
#include <vector>
 
#include "gpu-compute/exec_stage.hh"
#include "gpu-compute/misc.hh"
 
namespace gem5
{
 
struct ComputeUnitParams;
class Wavefront;
 
class PipeStageIFace
{
  public:
    virtual void reset() = 0;
};
 
class ScoreboardCheckToSchedule : public PipeStageIFace
{
  public:
    ScoreboardCheckToSchedule() = delete;
    ScoreboardCheckToSchedule(const ComputeUnitParams &p);
    void reset() override;
    void markWFReady(Wavefront *wf, int func_unit_id);
    int numReadyLists() const;
    std::vector<Wavefront*>& readyWFs(int func_unit_id);
 
    // TODO: Leftover from old CU code, needs to go away.
    void updateReadyList(int func_unit_id);
 
  private:
    std::vector<std::vector<Wavefront*>> _readyWFs;
};
 
class ScheduleToExecute : public PipeStageIFace
{
  public:
    ScheduleToExecute() = delete;
    ScheduleToExecute(const ComputeUnitParams &p);
    void reset() override;
    GPUDynInstPtr& readyInst(int func_unit_id);
    void dispatchTransition(const GPUDynInstPtr &gpu_dyn_inst,
                            int func_unit_id, DISPATCH_STATUS disp_status);
    void dispatchTransition(int func_unit_id, DISPATCH_STATUS disp_status);
    DISPATCH_STATUS dispatchStatus(int func_unit_id) const;
 
  private:
    std::vector<GPUDynInstPtr> _readyInsts;
    std::vector<DISPATCH_STATUS> _dispatchStatus;
};
 
} // namespace gem5
 
#endif // __GPU_COMPUTE_COMM_HH__