/*
 * Copyright (c) Advanced Micro Devices, Inc., or its affiliates.
 *
 * SPDX-License-Identifier: MIT
 */

#include "OCLPerfMapImageWriteSpeed.h"

#include <assert.h>
#include <stdio.h>
#include <string.h>

#include "CL/opencl.h"
#include "Timer.h"

// Quiet pesky warnings
#ifdef WIN_OS
#define SNPRINTF sprintf_s
#else
#define SNPRINTF snprintf
#endif

#define NUM_SIZES 4
static const unsigned int Sizes[NUM_SIZES] = {256, 512, 1024, 2048};

#define NUM_FORMATS 1
static const cl_image_format formats[NUM_FORMATS] = {{CL_RGBA, CL_UNSIGNED_INT8}};
static const char* textFormats[NUM_FORMATS] = {"R8G8B8A8"};
static const unsigned int formatSize[NUM_FORMATS] = {4};

static const unsigned int Iterations[2] = {1, OCLPerfMapImageWriteSpeed::NUM_ITER};

OCLPerfMapImageWriteSpeed::OCLPerfMapImageWriteSpeed() {
  _numSubTests = NUM_SIZES * NUM_FORMATS * 2;
}

OCLPerfMapImageWriteSpeed::~OCLPerfMapImageWriteSpeed() {}

static void CL_CALLBACK notify_callback(const char* errinfo, const void* private_info, size_t cb,
                                        void* user_data) {}

void OCLPerfMapImageWriteSpeed::open(unsigned int test, char* units, double& conversion,
                                     unsigned int deviceId) {
  cl_uint typeOfDevice = type_;
  cl_uint numPlatforms;
  cl_platform_id platform = NULL;
  cl_uint num_devices = 0;
  cl_device_id* devices = NULL;
  cl_device_id device = NULL;
  _crcword = 0;
  conversion = 1.0f;
  _deviceId = deviceId;
  _openTest = test;

  context_ = 0;
  cmd_queue_ = 0;
  outBuffer_ = 0;
  skip_ = false;

  error_ = _wrapper->clGetPlatformIDs(0, NULL, &numPlatforms);
  CHECK_RESULT(error_ != CL_SUCCESS, "clGetPlatformIDs failed");
  if (0 < numPlatforms) {
    cl_platform_id* platforms = new cl_platform_id[numPlatforms];
    error_ = _wrapper->clGetPlatformIDs(numPlatforms, platforms, NULL);
    CHECK_RESULT(error_ != CL_SUCCESS, "clGetPlatformIDs failed");
#if 0
        // Get last for default
        platform = platforms[numPlatforms-1];
        for (unsigned i = 0; i < numPlatforms; ++i) {
#endif
    platform = platforms[_platformIndex];
    char pbuf[100];
    error_ = _wrapper->clGetPlatformInfo(platforms[_platformIndex], CL_PLATFORM_VENDOR,
                                         sizeof(pbuf), pbuf, NULL);
    num_devices = 0;
    /* Get the number of requested devices */
    error_ =
        _wrapper->clGetDeviceIDs(platforms[_platformIndex], typeOfDevice, 0, NULL, &num_devices);
    // Runtime returns an error when no GPU devices are present instead of just
    // returning 0 devices
    // CHECK_RESULT(error_ != CL_SUCCESS, "clGetDeviceIDs failed");
    // Choose platform with GPU devices
    // if (num_devices > 0)
    //{
    //    platform = platforms[_platformIndex];
    //    break;
    //}
#if 0
        }
#endif
    delete platforms;
  }

  bufSize_ = Sizes[_openTest % NUM_SIZES];
  bufnum_ = (_openTest / NUM_SIZES) % NUM_FORMATS;
  numIter = Iterations[_openTest / (NUM_SIZES * NUM_FORMATS)];

  /*
   * If we could find our platform, use it. If not, die as we need the AMD
   * platform for these extensions.
   */
  CHECK_RESULT(platform == 0, "Couldn't find AMD platform, cannot proceed");

  devices = (cl_device_id*)malloc(num_devices * sizeof(cl_device_id));
  CHECK_RESULT(devices == 0, "no devices");

  /* Get the requested device */
  error_ = _wrapper->clGetDeviceIDs(platform, typeOfDevice, num_devices, devices, NULL);
  CHECK_RESULT(error_ != CL_SUCCESS, "clGetDeviceIDs failed");

  CHECK_RESULT(_deviceId >= num_devices, "Requested deviceID not available");
  device = devices[_deviceId];
  size_t size;
  cl_bool imageSupport_ = false;
  error_ = _wrapper->clGetDeviceInfo(device, CL_DEVICE_IMAGE_SUPPORT, sizeof(imageSupport_),
                                     &imageSupport_, &size);
  if (!imageSupport_) {
    printf("\n%s\n", "Image not supported, skipping this test!");
    skip_ = true;
    return;
  }
  context_ = _wrapper->clCreateContext(NULL, 1, &device, notify_callback, NULL, &error_);
  CHECK_RESULT(context_ == 0, "clCreateContext failed");

  cmd_queue_ = _wrapper->clCreateCommandQueue(context_, device, 0, NULL);
  CHECK_RESULT(cmd_queue_ == 0, "clCreateCommandQueue failed");

  cl_mem_flags flags = CL_MEM_READ_ONLY;
  outBuffer_ = _wrapper->clCreateImage2D(context_, flags, &formats[bufnum_], bufSize_, bufSize_, 0,
                                         NULL, &error_);
  CHECK_RESULT(outBuffer_ == 0, "clCreateImage(outBuffer) failed");
}

void OCLPerfMapImageWriteSpeed::run(void) {
  if (skip_) {
    return;
  }
  CPerfCounter timer;

  void* mem;
  size_t origin[3] = {0, 0, 0};
  size_t region[3] = {bufSize_, bufSize_, 1};
  size_t image_row_pitch;
  size_t image_slice_pitch;
  // Warm up
  mem = _wrapper->clEnqueueMapImage(cmd_queue_, outBuffer_, CL_TRUE, CL_MAP_WRITE, origin, region,
                                    &image_row_pitch, &image_slice_pitch, 0, NULL, NULL, &error_);

  CHECK_RESULT(error_, "clEnqueueMapImage failed");
  error_ = _wrapper->clEnqueueUnmapMemObject(cmd_queue_, outBuffer_, mem, 0, NULL, NULL);
  CHECK_RESULT(error_, "clEnqueueUnmapBuffer failed");
  error_ = _wrapper->clFinish(cmd_queue_);
  CHECK_RESULT(error_, "clFinish failed");

  timer.Reset();
  timer.Start();
  for (unsigned int i = 0; i < numIter; i++) {
    mem = _wrapper->clEnqueueMapImage(cmd_queue_, outBuffer_, CL_TRUE, CL_MAP_WRITE, origin, region,
                                      &image_row_pitch, &image_slice_pitch, 0, NULL, NULL, &error_);

    CHECK_RESULT(error_, "clEnqueueMapImage failed");
    error_ = _wrapper->clEnqueueUnmapMemObject(cmd_queue_, outBuffer_, mem, 0, NULL, NULL);
    CHECK_RESULT(error_, "clEnqueueUnmapBuffer failed");
    error_ = _wrapper->clFinish(cmd_queue_);
    CHECK_RESULT(error_, "clFinish failed");
  }

  timer.Stop();
  double sec = timer.GetElapsedTime();

  // Image map write bandwidth in GB/s
  double perf =
      ((double)bufSize_ * bufSize_ * formatSize[bufnum_] * numIter * (double)(1e-09)) / sec;

  _perfInfo = (float)perf;

  char buf[256];
  SNPRINTF(buf, sizeof(buf), " (%4dx%4d) fmt:%s i: %4d (GB/s) ", bufSize_, bufSize_,
           textFormats[bufnum_], numIter);
  testDescString = buf;
}

unsigned int OCLPerfMapImageWriteSpeed::close(void) {
  if (skip_) {
    return CL_SUCCESS;
  }
  if (outBuffer_) {
    error_ = _wrapper->clReleaseMemObject(outBuffer_);
    CHECK_RESULT_NO_RETURN(error_ != CL_SUCCESS, "clReleaseMemObject(outBuffer_) failed");
  }
  if (cmd_queue_) {
    error_ = _wrapper->clReleaseCommandQueue(cmd_queue_);
    CHECK_RESULT_NO_RETURN(error_ != CL_SUCCESS, "clReleaseCommandQueue failed");
  }
  if (context_) {
    error_ = _wrapper->clReleaseContext(context_);
    CHECK_RESULT_NO_RETURN(error_ != CL_SUCCESS, "clReleaseContext failed");
  }

  return _crcword;
}