src/gpu-compute/gpu_compute_driver.hh

/*
 * Copyright (c) 2015-2018 Advanced Micro Devices, Inc.
 * All rights reserved.
 *
 * For use for simulation and test purposes only
 *
 * 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
 * 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: Sooraj Puthoor
 *          Anthony Gutierrez
 */

/**
 * @file
 * The GPUComputeDriver implements an HSADriver for an HSA AMD GPU
 * agent. Other GPU devices, or other HSA agents, should not derive
 * from this class. Instead device-specific implementations of an
 * HSADriver should be provided for each unique device.
 */

#ifndef __GPU_COMPUTE_GPU_COMPUTE_DRIVER_HH__
#define __GPU_COMPUTE_GPU_COMPUTE_DRIVER_HH__

#include "dev/hsa/hsa_driver.hh"

struct GPUComputeDriverParams;

class GPUComputeDriver final : public HSADriver
{
  public:
    typedef GPUComputeDriverParams Params;
    GPUComputeDriver(Params *p);
    int ioctl(ThreadContext *tc, unsigned req, Addr ioc_buf) override;

  private:
    /**
     * The aperture (APE) base/limit pairs are set
     * statically at startup by the real KFD. AMD
     * x86_64 CPUs only use the areas in the 64b
     * address space where VA[63:47] == 0x1ffff or
     * VA[63:47] = 0. These methods generate the APE
     * base/limit pairs in exactly the same way as
     * the real KFD does, which ensures these APEs do
     * not fall into the CPU's address space
     *
     * see the macros in the KFD driver in the ROCm
     * Linux kernel source:
     *
     * drivers/gpu/drm/amd/amdkfd/kfd_flat_memory.c
     */
    Addr gpuVmApeBase(int gpuNum) const;
    Addr gpuVmApeLimit(Addr apeBase) const;
    Addr scratchApeBase(int gpuNum) const;
    Addr scratchApeLimit(Addr apeBase) const;
    Addr ldsApeBase(int gpuNum) const;
    Addr ldsApeLimit(Addr apeBase) const;
};

#endif // __GPU_COMPUTE_GPU_COMPUTE_DRIVER_HH__