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*/

/* This testfile verifies the basic functionality of
   hipExtLaunchMultiKernelMultiDevice API.
   It can be tested on single GPU or multi GPUs.
*/


#include <hip_test_kernels.hh>
#include <hip_test_checkers.hh>
#include "hip/hip_runtime.h"

#define MAX_GPUS 8
#define NUM_KERNEL_ARGS 3

/*
This testcase verifies hipExtLaunchMultiKernelMultiDevice API for different
datatypes where
1. Intitialize device variables
2. Initializing hipLaunchParams structure to pass it to
   hipExtLaunchMultiKernelMultiDevice API
3. Launches vector_square kernel which performs square of the variable
4. Validates the result with the square of variable.
*/

TEMPLATE_TEST_CASE("Unit_hipExtLaunchMultiKernelMultiDevice_Basic", "", int
                   , float, double) {
  TestType *A_d[MAX_GPUS], *C_d[MAX_GPUS];
  TestType *A_h, *C_h;
  size_t N = 1000000;
  size_t Nbytes = N * sizeof(TestType);
  int nGpu = 0;

  HIP_CHECK(hipGetDeviceCount(&nGpu));
  if (nGpu < 1) {
    SUCCEED("info: didn't find any GPU! Skipping the testcase");
  } else {
    if (nGpu > MAX_GPUS) {
      nGpu = MAX_GPUS;
    }
    HipTest::initArrays<TestType>(nullptr, nullptr, nullptr,
                                  &A_h, nullptr, &C_h, N, false);
    const unsigned blocks = 512;
    const unsigned threadsPerBlock = 256;

    // Allocating and initializing device variables
    hipStream_t stream[MAX_GPUS];
    for (int i = 0; i < nGpu; i++) {
      HIP_CHECK(hipSetDevice(i));
      HIP_CHECK(hipStreamCreateWithFlags(&stream[i], hipStreamNonBlocking));
      hipDeviceProp_t props;
      HIP_CHECK(hipGetDeviceProperties(&props, i/*deviceID*/));
      INFO("Running on bus 0x" << props.pciBusID << " " << props.name);
      INFO("Allocate device mem " << 2*Nbytes/1024.0/1024.0);
      HIP_CHECK(hipMalloc(&A_d[i], Nbytes));
      HIP_CHECK(hipMalloc(&C_d[i], Nbytes));
      HIP_CHECK(hipMemcpy(A_d[i], A_h, Nbytes, hipMemcpyHostToDevice));
    }

    hipLaunchParams *launchParamsList = reinterpret_cast<hipLaunchParams *>(
        malloc(sizeof(hipLaunchParams)*nGpu));
    void *args[MAX_GPUS * NUM_KERNEL_ARGS];

    // Intializing the hipLaunchParams structure with device variables
    // ,kernel and launching hipExtLaunchMultiKernelMultiDevice API
    for (int i = 0; i < nGpu; i++) {
      args[i * NUM_KERNEL_ARGS]     = &A_d[i];
      args[i * NUM_KERNEL_ARGS + 1] = &C_d[i];
      args[i * NUM_KERNEL_ARGS + 2] = &N;
      launchParamsList[i].func  =
        reinterpret_cast<void *>(HipTest::vector_square<TestType>);
      launchParamsList[i].gridDim   = dim3(blocks);
      launchParamsList[i].blockDim  = dim3(threadsPerBlock);
      launchParamsList[i].sharedMem = 0;
      launchParamsList[i].stream    = stream[i];
      launchParamsList[i].args      = args + i * NUM_KERNEL_ARGS;
    }

    hipExtLaunchMultiKernelMultiDevice(launchParamsList, nGpu, 0);

    // Validating the result
    for (int j = 0; j < nGpu; j++) {
      hipStreamSynchronize(stream[j]);
      hipDeviceProp_t props;
      HIP_CHECK(hipGetDeviceProperties(&props, j/*deviceID*/));
      INFO("Checking result on bus " << props.pciBusID << props.name);

      HIP_CHECK(hipSetDevice(j));
      HIP_CHECK(hipMemcpy(C_h, C_d[j], Nbytes, hipMemcpyDeviceToHost));

      for (size_t i = 0; i < N; i++)  {
        if (C_h[i] != A_h[i] * A_h[i]) {
          INFO("validation failed " << C_h[i] << A_h[i]*A_h[i]);
          REQUIRE(false);
        }
      }
    }

    // DeAllocating memory
    HipTest::freeArrays<TestType>(nullptr, nullptr, nullptr,
                                  A_h, nullptr, C_h, false);
    for (int j = 0; j < nGpu; j++) {
      HIP_CHECK(hipFree(A_d[j]));
      HIP_CHECK(hipFree(C_d[j]));
      HIP_CHECK(hipStreamDestroy(stream[j]));
    }
  }
}