/* Copyright (c) 2020, NVIDIA CORPORATION. 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 NVIDIA CORPORATION 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 ``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
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 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#pragma once
#ifndef __VKCUDA_H__
#define __VKCUDA_H__

#include <cuda_runtime_api.h>
#include "cuda.h"
#define CUDA_DRIVER_API
#include <helper_cuda.h>

bool isDeviceCompatible(void *Uuid, size_t size) {

    int cudaDevice = cudaInvalidDeviceId;
    int deviceCount;
    checkCudaErrors(cudaGetDeviceCount(&deviceCount));

    for (int i = 0; i < deviceCount; ++i) {
        cudaDeviceProp devProp = { };
        checkCudaErrors(cudaGetDeviceProperties(&devProp, i));
        if (!memcmp(&devProp.uuid, Uuid, size)) {
            cudaDevice = i;
            break;
        }
    }
    if (cudaDevice == cudaInvalidDeviceId) {
        return false;
    }

    int deviceSupportsHandle = 0;
    int attributeVal = 0;
    int deviceComputeMode = 0;

    checkCudaErrors(cuDeviceGetAttribute(&deviceComputeMode, CU_DEVICE_ATTRIBUTE_COMPUTE_MODE, cudaDevice));
    checkCudaErrors(cuDeviceGetAttribute(&attributeVal, CU_DEVICE_ATTRIBUTE_VIRTUAL_ADDRESS_MANAGEMENT_SUPPORTED, cudaDevice));

#if defined(__linux__)
    checkCudaErrors(cuDeviceGetAttribute(&deviceSupportsHandle, CU_DEVICE_ATTRIBUTE_HANDLE_TYPE_POSIX_FILE_DESCRIPTOR_SUPPORTED, cudaDevice));
#else
    checkCudaErrors(cuDeviceGetAttribute(&deviceSupportsHandle, CU_DEVICE_ATTRIBUTE_HANDLE_TYPE_WIN32_HANDLE_SUPPORTED, cudaDevice));
#endif

    if ((deviceComputeMode != CU_COMPUTEMODE_DEFAULT) || !attributeVal || !deviceSupportsHandle) {
        return false;
    }
    return true;
}

#endif // __VKCUDA_H__