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*/

/*
This testcase verifies the hipMemcpyDtoD basic scenario
1. H2D-KernelLaunch-D2H scenario
*/

#include <hip_test_common.hh>
#include <hip_test_kernels.hh>
#include <hip_test_checkers.hh>

static constexpr auto NUM_ELM{1024};

/*
This testcase verifies hipMemcpyDtoD API
1.Initializes device variables
2.Launches kernel and performs the sum of device variables
3.Copies the result to host variable and validates the result.
4.Sets the peer device
5.D2D copy from GPU-0 to GPU-1
6.Kernel Launch
7.DtoH copy and validating the result
*/
TEMPLATE_TEST_CASE("Unit_hipMemcpyDtoD_Basic", "",
                   int, float, double) {
  size_t Nbytes = NUM_ELM * sizeof(TestType);
  int numDevices = 0;
  TestType *A_d{nullptr}, *B_d{nullptr}, *C_d{nullptr},
           *X_d{nullptr}, *Y_d{nullptr}, *Z_d{nullptr};
  TestType *A_h{nullptr}, *B_h{nullptr}, *C_h{nullptr};

  HIP_CHECK(hipGetDeviceCount(&numDevices));
  if (numDevices > 1) {
    int canAccessPeer = 0;
    HIP_CHECK(hipDeviceCanAccessPeer(&canAccessPeer, 0, 1));
    if (canAccessPeer) {
      HIP_CHECK(hipSetDevice(0));
      HipTest::initArrays<TestType>(&A_d, &B_d, &C_d, &A_h, &B_h, &C_h,
                                    NUM_ELM, false);
      HIP_CHECK(hipSetDevice(1));
      HIP_CHECK(hipMalloc(&X_d, Nbytes));
      HIP_CHECK(hipMalloc(&Y_d, Nbytes));
      HIP_CHECK(hipMalloc(&Z_d, Nbytes));

      HIP_CHECK(hipSetDevice(0));
      HIP_CHECK(hipMemcpy(A_d, A_h, Nbytes, hipMemcpyHostToDevice));
      HIP_CHECK(hipMemcpy(B_d, B_h, Nbytes, hipMemcpyHostToDevice));
      hipLaunchKernelGGL(HipTest::vectorADD, dim3(1),
                         dim3(1), 0, 0,
                         static_cast<const TestType *>(A_d),
                         static_cast<const TestType *>(B_d), C_d, NUM_ELM);
      HIP_CHECK(hipGetLastError());
      HIP_CHECK(hipMemcpy(C_h, C_d, Nbytes, hipMemcpyDeviceToHost));
      HIP_CHECK(hipDeviceSynchronize());
      HipTest::checkVectorADD<TestType>(A_h, B_h, C_h, NUM_ELM);

      HIP_CHECK(hipSetDevice(1));
      HIP_CHECK(hipMemcpyDtoD((hipDeviceptr_t)X_d, (hipDeviceptr_t)A_d,
                              Nbytes));
      HIP_CHECK(hipMemcpyDtoD((hipDeviceptr_t)Y_d, (hipDeviceptr_t)B_d,
                              Nbytes));

      hipLaunchKernelGGL(HipTest::vectorADD, dim3(1),
                         dim3(1), 0, 0,
                         static_cast<const TestType*>(X_d),
                         static_cast<const TestType*>(Y_d), Z_d, NUM_ELM);
      HIP_CHECK(hipGetLastError());
      HIP_CHECK(hipMemcpyDtoH(C_h, (hipDeviceptr_t)Z_d, Nbytes));
      HIP_CHECK(hipDeviceSynchronize());
      HipTest::checkVectorADD<TestType>(A_h, B_h, C_h, NUM_ELM);

      HipTest::freeArrays<TestType>(A_d, B_d, C_d, A_h, B_h, C_h, false);
      HIP_CHECK(hipFree(X_d));
      HIP_CHECK(hipFree(Y_d));
      HIP_CHECK(hipFree(Z_d));
    } else {
      SUCCEED("Machine does not seem to have P2P Capabilities");
    }
  }
}
