/*
Copyright (c) 2015-2016 Advanced Micro Devices, Inc. All rights reserved.

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
*/

#include <iostream>

// hip header file
#include <hip/hip_runtime.h>

#ifndef ITERATIONS
# define ITERATIONS 100
#endif
#define WIDTH 1024


#define NUM (WIDTH * WIDTH)

#define THREADS_PER_BLOCK_X 4
#define THREADS_PER_BLOCK_Y 4
#define THREADS_PER_BLOCK_Z 1

// Device (Kernel) function, it must be void
// hipLaunchParm provides the execution configuration
__global__ void matrixTranspose(hipLaunchParm lp, float* out, float* in, const int width) {
    int x = hipBlockDim_x * hipBlockIdx_x + hipThreadIdx_x;
    int y = hipBlockDim_y * hipBlockIdx_y + hipThreadIdx_y;

    out[y * width + x] = in[x * width + y];
}

// CPU implementation of matrix transpose
void matrixTransposeCPUReference(float* output, float* input, const unsigned int width) {
    for (unsigned int j = 0; j < width; j++) {
        for (unsigned int i = 0; i < width; i++) {
            output[i * width + j] = input[j * width + i];
        }
    }
}

int iterations = ITERATIONS;
void init_tracing();
void start_tracing();
void stop_tracing();

int main() {
    float* Matrix;
    float* TransposeMatrix;
    float* cpuTransposeMatrix;

    float* gpuMatrix;
    float* gpuTransposeMatrix;

    hipDeviceProp_t devProp;
    hipGetDeviceProperties(&devProp, 0);

    std::cout << "Device name " << devProp.name << std::endl;

    int i;
    int errors;

    init_tracing();

    while (iterations-- > 0) {
        start_tracing();

        Matrix = (float*)malloc(NUM * sizeof(float));
        TransposeMatrix = (float*)malloc(NUM * sizeof(float));
        cpuTransposeMatrix = (float*)malloc(NUM * sizeof(float));
    
        // initialize the input data
        for (i = 0; i < NUM; i++) {
            Matrix[i] = (float)i * 10.0f;
        }
    
        // allocate the memory on the device side
        hipMalloc((void**)&gpuMatrix, NUM * sizeof(float));
        hipMalloc((void**)&gpuTransposeMatrix, NUM * sizeof(float));
    
        // Memory transfer from host to device
        hipMemcpy(gpuMatrix, Matrix, NUM * sizeof(float), hipMemcpyHostToDevice);
    
        // Lauching kernel from host
        hipLaunchKernel(matrixTranspose, dim3(WIDTH / THREADS_PER_BLOCK_X, WIDTH / THREADS_PER_BLOCK_Y),
                        dim3(THREADS_PER_BLOCK_X, THREADS_PER_BLOCK_Y), 0, 0, gpuTransposeMatrix,
                        gpuMatrix, WIDTH);
    
        // Memory transfer from device to host
        hipMemcpy(TransposeMatrix, gpuTransposeMatrix, NUM * sizeof(float), hipMemcpyDeviceToHost);
    
        // CPU MatrixTranspose computation
        matrixTransposeCPUReference(cpuTransposeMatrix, Matrix, WIDTH);
    
        // verify the results
        errors = 0;
        double eps = 1.0E-6;
        for (i = 0; i < NUM; i++) {
            if (std::abs(TransposeMatrix[i] - cpuTransposeMatrix[i]) > eps) {
                errors++;
            }
        }
        if (errors != 0) {
            printf("FAILED: %d errors\n", errors);
        } else {
            printf("PASSED!\n");
        }
    
        // free the resources on device side
        hipFree(gpuMatrix);
        hipFree(gpuTransposeMatrix);
    
        // free the resources on host side
        free(Matrix);
        free(TransposeMatrix);
        free(cpuTransposeMatrix);

        stop_tracing();
    }

    return errors;
}

////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// HIP Callbacks/Activity tracing
//
#if 1
#include <inc/roctracer_hip.h>
#include <inc/roctracer_hcc.h>

// Macro to check ROC-tracer calls status
#define ROCTRACER_CALL(call)                                                                       \
  do {                                                                                             \
    int err = call;                                                                                \
    if (err != 0) {                                                                                \
      std::cerr << roctracer_error_string() << std::endl << std::flush;                            \
      abort();                                                                                     \
    }                                                                                              \
  } while (0)

// Runtime API callback function
void api_callback(
    uint32_t domain,
    uint32_t cid,
    const void* callback_data,
    void* arg)
{
  (void)arg;
  const hip_api_data_t* data = reinterpret_cast<const hip_api_data_t*>(callback_data);
  fprintf(stdout, "<%s id(%u)\tcorrelation_id(%lu) %s> ",
    roctracer_op_string(ACTIVITY_DOMAIN_HIP_API, cid, 0),
    cid,
    data->correlation_id,
    (data->phase == ACTIVITY_API_PHASE_ENTER) ? "on-enter" : "on-exit");
  if (data->phase == ACTIVITY_API_PHASE_ENTER) {
    switch (cid) {
      case HIP_API_ID_hipMemcpy:
        fprintf(stdout, "dst(%p) src(%p) size(0x%x) kind(%u)",
          data->args.hipMemcpy.dst,
          data->args.hipMemcpy.src,
          (uint32_t)(data->args.hipMemcpy.sizeBytes),
          (uint32_t)(data->args.hipMemcpy.kind));
        break;
      case HIP_API_ID_hipMalloc:
        fprintf(stdout, "ptr(%p) size(0x%x)",
          data->args.hipMalloc.ptr,
          (uint32_t)(data->args.hipMalloc.size));
        break;
      case HIP_API_ID_hipFree:
        fprintf(stdout, "ptr(%p)",
          data->args.hipFree.ptr);
        break;
      case HIP_API_ID_hipModuleLaunchKernel:
        fprintf(stdout, "kernel(\"%s\") stream(%p)",
          hipKernelNameRef(data->args.hipModuleLaunchKernel.f),
          data->args.hipModuleLaunchKernel.stream);
        break;
      default:
        break;
    }
  } else {
    switch (cid) {
      case HIP_API_ID_hipMalloc:
        fprintf(stdout, "*ptr(0x%p)",
          *(data->args.hipMalloc.ptr));
        break;
      default:
        break;
    }
  }
  fprintf(stdout, "\n"); fflush(stdout);
}

// Activity tracing callback
//   hipMalloc id(3) correlation_id(1): begin_ns(1525888652762640464) end_ns(1525888652762877067)
void activity_callback(const char* begin, const char* end, void* arg) {
  const roctracer_record_t* record = reinterpret_cast<const roctracer_record_t*>(begin);
  const roctracer_record_t* end_record = reinterpret_cast<const roctracer_record_t*>(end);
  fprintf(stdout, "\tActivity records:\n"); fflush(stdout);
  while (record < end_record) {
    const char * name = roctracer_op_string(record->domain, record->op, record->kind);
    fprintf(stdout, "\t%s\tcorrelation_id(%lu) time_ns(%lu:%lu)",
      name,
      record->correlation_id,
      record->begin_ns,
      record->end_ns
    );
    if (record->domain == ACTIVITY_DOMAIN_HIP_API) {
      fprintf(stdout, " process_id(%u) thread_id(%u)",
        record->process_id,
        record->thread_id
      );
    } else if (record->domain == ACTIVITY_DOMAIN_HCC_OPS) {
      fprintf(stdout, " device_id(%d) queue_id(%lu)",
        record->device_id,
        record->queue_id
      );
    } else {
      fprintf(stderr, "Bad domain %d\n", record->domain);
      abort();
    }
    if (record->op == hc::HSA_OP_ID_COPY) fprintf(stdout, " bytes(0x%zx)", record->bytes);
    fprintf(stdout, "\n");
    fflush(stdout);
    ROCTRACER_CALL(roctracer_next_record(record, &record));
  }
}

// Init tracing routine
void init_tracing() {
  std::cout << "# START #############################" << std::endl << std::flush;
  // Allocating tracing pool
  roctracer_properties_t properties{};
  properties.buffer_size = 0x1000;
  properties.buffer_callback_fun = activity_callback;
  ROCTRACER_CALL(roctracer_open_pool(&properties));
}

// Start tracing routine
void start_tracing() {
  std::cout << "# START #############################" << std::endl << std::flush;
  // Enable HIP API callbacks
  ROCTRACER_CALL(roctracer_enable_callback(api_callback, NULL));
  // Enable HIP activity tracing
  ROCTRACER_CALL(roctracer_enable_activity());
}

// Stop tracing routine
void stop_tracing() {
  ROCTRACER_CALL(roctracer_disable_callback());
  ROCTRACER_CALL(roctracer_disable_activity());
  ROCTRACER_CALL(roctracer_flush_activity());
  std::cout << "# STOP  #############################" << std::endl << std::flush;
}
#else
void start_tracing() {}
void stop_tracing() {}
#endif
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////