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

#include "OCLPerfDeviceEnqueue.h"

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

#include "CL/cl.h"

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

#define KERNEL_CODE(...) #__VA_ARGS__

typedef struct {
  unsigned int threads;
} testStruct;

static testStruct testList[] = {
    {64}, {128}, {256}, {512}, {1024}, {2048}, {4096},
};

const static char* strKernel = {KERNEL_CODE(
    \n __kernel void childKernel(__global uint* buf) {
  int idx = get_global_id(0);
  if (idx < 0) {
    buf[idx] = 0;
  }
}
    \n __kernel void parentKernel(__global uint* buf) {
  queue_t def_q = get_default_queue();
  ndrange_t ndrange = ndrange_1D(64, 64);
  int gid = get_global_id(0);

  int enq_res = enqueue_kernel(def_q, CLK_ENQUEUE_FLAGS_WAIT_KERNEL, ndrange, ^{
    childKernel(buf);
  });
}
    \n)};

OCLPerfDeviceEnqueue::OCLPerfDeviceEnqueue() {
  testListSize = sizeof(testList) / sizeof(testStruct);
  _numSubTests = 7 * testListSize;
  deviceQueue_ = NULL;
  failed_ = false;
  kernel2_ = NULL;
}

OCLPerfDeviceEnqueue::~OCLPerfDeviceEnqueue() {}

void OCLPerfDeviceEnqueue::open(unsigned int test, char* units, double& conversion,
                                unsigned int deviceId) {
  if (type_ == CL_DEVICE_TYPE_CPU) {
    return;
  }

  OCLTestImp::open(test, units, conversion, deviceId);
  CHECK_RESULT((error_ != CL_SUCCESS), "Error opening test");
  testID_ = test;

  threads = testList[testID_ % testListSize].threads;
  size_t param_size = 0;
  char* strVersion = 0;
  error_ = _wrapper->clGetDeviceInfo(devices_[_deviceId], CL_DEVICE_VERSION, 0, 0, &param_size);
  CHECK_RESULT(error_ != CL_SUCCESS, "clGetDeviceInfo failed");
  strVersion = new char[param_size];
  error_ =
      _wrapper->clGetDeviceInfo(devices_[_deviceId], CL_DEVICE_VERSION, param_size, strVersion, 0);
  CHECK_RESULT(error_ != CL_SUCCESS, "clGetDeviceInfo failed");
  if (strVersion[7] < '2') {
    failed_ = true;
    return;
  }
  delete strVersion;
  cl_uint maxDevQSize = 0;
#if defined(CL_VERSION_2_0)
  error_ = _wrapper->clGetDeviceInfo(devices_[_deviceId], CL_DEVICE_QUEUE_ON_DEVICE_MAX_SIZE,
                                     sizeof(cl_uint), &maxDevQSize, 0);
  CHECK_RESULT(error_ != CL_SUCCESS, "clGetDeviceInfo failed");
#endif

  program_ = _wrapper->clCreateProgramWithSource(context_, 1, &strKernel, NULL, &error_);
  CHECK_RESULT((error_ != CL_SUCCESS), "clCreateProgramWithSource()  failed");

  error_ = _wrapper->clBuildProgram(program_, 1, &devices_[deviceId], "-cl-std=CL2.0", NULL, NULL);
  if (error_ != CL_SUCCESS) {
    char programLog[1024];
    _wrapper->clGetProgramBuildInfo(program_, devices_[deviceId], CL_PROGRAM_BUILD_LOG, 1024,
                                    programLog, 0);
    printf("\n%s\n", programLog);
    fflush(stdout);
  }
  CHECK_RESULT((error_ != CL_SUCCESS), "clBuildProgram() failed");

  kernel_ = _wrapper->clCreateKernel(program_, "parentKernel", &error_);
  CHECK_RESULT((error_ != CL_SUCCESS), "clCreateKernel() failed");

  kernel2_ = _wrapper->clCreateKernel(program_, "childKernel", &error_);
  CHECK_RESULT((error_ != CL_SUCCESS), "clCreateKernel() failed");

  cl_mem buffer;

  buffer = _wrapper->clCreateBuffer(context_, CL_MEM_ALLOC_HOST_PTR, 2048, NULL, &error_);
  CHECK_RESULT((error_ != CL_SUCCESS), "clCreateBuffer() failed");
  buffers_.push_back(buffer);

  // Hardcoded for us
  if (testID_ >= testListSize) {
    queueSize = (1 << (testID_ / testListSize)) * 256 * 1024;
    queueSize = std::min(queueSize, maxDevQSize);
    threads *= (1 << (testID_ / testListSize - 1));
    threads = std::min(threads, queueSize / 128);
  } else {
    queueSize = std::max((cl_uint)threads * 128, (cl_uint)16384);
  }

#if defined(CL_VERSION_2_0)
  const cl_queue_properties cprops[] = {
      CL_QUEUE_PROPERTIES,
      static_cast<cl_queue_properties>(CL_QUEUE_OUT_OF_ORDER_EXEC_MODE_ENABLE |
                                       CL_QUEUE_ON_DEVICE_DEFAULT | CL_QUEUE_ON_DEVICE),
      CL_QUEUE_SIZE, queueSize, 0};
  deviceQueue_ =
      _wrapper->clCreateCommandQueueWithProperties(context_, devices_[deviceId], cprops, &error_);
  CHECK_RESULT((error_ != CL_SUCCESS), "clCreateCommandQueueWithProperties() failed");
#endif
}

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

void OCLPerfDeviceEnqueue::run(void) {
  CPerfCounter timer;
  if (type_ == CL_DEVICE_TYPE_CPU) {
    return;
  }

  if (failed_) return;

  cl_mem buffer = buffers()[0];

  size_t gws[1] = {threads};
  size_t lws[1] = {64};

  if (gws[0] >= 256) {
    lws[0] = 256;
  }

  error_ = _wrapper->clSetKernelArg(kernel_, 0, sizeof(cl_mem), &buffer);
  CHECK_RESULT((error_ != CL_SUCCESS), "clSetKernelArg() failed");

  error_ = _wrapper->clEnqueueNDRangeKernel(cmdQueues_[_deviceId], kernel_, 1, NULL, gws, lws, 0,
                                            NULL, NULL);
  CHECK_RESULT((error_ != CL_SUCCESS), "clEnqueueNDRangeKernel() failed");

  _wrapper->clFinish(cmdQueues_[_deviceId]);

  // Try to normalize the amount of work per test
  unsigned int repeats = (64 / threads) * 50;
  if (repeats == 0) repeats = 1;
  timer.Reset();
  timer.Start();
  for (unsigned int i = 0; i < repeats; i++) {
    error_ = _wrapper->clEnqueueNDRangeKernel(cmdQueues_[_deviceId], kernel_, 1, NULL, gws, lws, 0,
                                              NULL, NULL);
    CHECK_RESULT((error_ != CL_SUCCESS), "clEnqueueNDRangeKernel() failed");

    _wrapper->clFinish(cmdQueues_[_deviceId]);
  }
  timer.Stop();

  double sec = timer.GetElapsedTime();

  _perfInfo = (float)(threads * repeats) / (float)(sec * 1000000.);
  char buf[256];
  SNPRINTF(buf, sizeof(buf), "%7d threads spawning 64 threads, queue size %5dKB (Mdisp/s)", threads,
           queueSize / 1024);
  testDescString = buf;
}

unsigned int OCLPerfDeviceEnqueue::close(void) {
  // FIXME: Re-enable CPU test once bug 10143 is fixed.
  if (type_ == CL_DEVICE_TYPE_CPU) {
    return 0;
  }

  if (NULL != deviceQueue_) {
    _wrapper->clReleaseCommandQueue(deviceQueue_);
  }
  if (NULL != kernel2_) {
    _wrapper->clReleaseKernel(kernel2_);
  }
  return OCLTestImp::close();
}