//
// Copyright (c) 2008 Advanced Micro Devices, Inc. All rights reserved.
//

#ifndef GPUKERNEL_HPP_
#define GPUKERNEL_HPP_

#include "device/device.hpp"
#include "utils/macros.hpp"
#include "platform/command.hpp"
#include "platform/program.hpp"
#include "platform/kernel.hpp"
#include "platform/sampler.hpp"
#include "device/gpu/gpudevice.hpp"
#include "device/gpu/gpuvirtual.hpp"
#include "amd_hsa_kernel_code.h"
#include "device/gpu/gpuprintf.hpp"
#include "device/devwavelimiter.hpp"
#include "hsa.h"

namespace amd {
namespace hsa {
namespace loader {
class Symbol;
}  // loader
}  // hsa
}  // amd

//! \namespace gpu GPU Device Implementation
namespace gpu {

class VirtualGPU;
class Device;
class NullDevice;
class HSAILProgram;

struct HWSHADER_Helper {
  template <typename S, typename T> static T Get(S base, T offset) {
    return reinterpret_cast<T>(reinterpret_cast<intptr_t>(base) + reinterpret_cast<size_t>(offset));
  }
};

#define HWSHADER_Get(shader, field) HWSHADER_Helper::Get((shader), (shader)->field)

template <typename D, typename S>
static void CalcPtr(D& dst, const S src, size_t structSize, size_t size) {
  dst = reinterpret_cast<D>(reinterpret_cast<const intptr_t>(src) + structSize * size);
}

/*! \addtogroup GPU GPU Device Implementation
 *  @{
 */

/*! \brief Helper function for the std::string processing.
 *  Finds the name in the std::string
 *
 *  \return True if we found the entry of the symbols
 */
bool expect(const std::string& str,  //!< The original std::string
            size_t* pos,             //!< Position to start
            const std::string& sym   //!< The sympols to expect
            );

/*! \brief Helper function for the std::string processing.
 *  Gets a word from the std::string
 *
 *  \return True if we successfully received a word
 */
bool getword(const std::string& str,  //!< The original std::string
             size_t* pos,             //!< Position to start
             std::string& sym         //!< Returned word
             );

/*! \brief Helper function for the std::string processing.
 *  Loads numbers from the metadata
 *
 *  \return True if we loaded a number
 */
bool getuint(const std::string& str,  //!< The original std::string
             size_t* pos,             //!< Position to start
             uint* val                //!< Returned number
             );

/*! \brief Helper function for the std::string processing.
 *  Loads numbers from the metadata in HEX format
 *
 *  \return True if we loaded a number
 */
bool getuintHex(const std::string& str,  //!< The original std::string
                size_t* pos,             //!< Position to start
                uint* val                //!< Returned number
                );

/*! \brief Helper function for the std::string processing.
 *  Loads numbers from the metadata in HEX format
 *
 *  \return True if we loaded a number
 */
bool getuint64Hex(const std::string& str,  //!< The original std::string
                  size_t* pos,             //!< Position to start
                  uint64_t* val            //!< Returned number
                  );

/*! \brief Helper function for the std::string processing.
 *  Converts unsigned integer to string
 *
 *  \return None
 */
void intToStr(size_t value,  //!< Value for conversion
              char* str,     //!< Pointer to the converted string
              size_t size    //!< String size
              );

//! Image constant data from ABI specification
struct ImageConstants : public amd::EmbeddedObject {
  uint32_t width_;         //!< Image surface width
  uint32_t height_;        //!< Image surface height
  uint32_t depth_;         //!< Image surface depth (1 for 2D images)
  uint32_t dataType_;      //!< Image surface data type
  float widthFloat_;       //!< Image surface width
  float heightFloat_;      //!< Image surface height
  float depthFloat_;       //!< Image surface depth (1 for 2D images)
  uint32_t channelOrder_;  //!< Image surface texels channel order
};

//! Kernel arguments
struct KernelArg : public amd::HeapObject {
 public:
  //! \enum Kernel argument type
  enum ArgumentType {
    NoType = 0,
    PointerGlobal,
    Value,
    Image,
    PointerLocal,
    PointerHwLocal,
    PointerPrivate,
    PointerHwPrivate,
    PointerConst,
    PointerHwConst,
    Float,
    Double,
    Half,
    Char,
    UChar,
    Short,
    UShort,
    Int,
    UInt,
    Long,
    ULong,
    Struct,
    Union,
    Opaque,
    Event,
    Image1D,  //!< first image
    Image2D,
    Image1DB,
    Image1DA,
    Image2DA,
    Image3D,  //!< last image
    Counter,
    Sampler,
    PrivateSize,
    LocalSize,
    HwPrivateSize,
    HwLocalSize,
    Grouping,
    WrkgrpSize,
    Wavefront,
    PrivateFixed,
    ErrorMessage,
    WarningMessage,
    PrintfFormatStr,
    MetadataVersion,
    UavId,
    ABI64Bit,
    GWS,
    SWGWS,
    Reflection,
    ConstArg,
    ConstBufId,
    PrintfBufId,
    GroupingHint,
    VecTypeHint,
    WavesPerSimdHint,
    TotalTypes
  };

  // The compiler metadata fields
  std::string name_;   //!< parameters name
  ArgumentType type_;  //!< type of argument
  union {
    uint size_;      //!< number of arguments (for values and pointers only)
    uint location_;  //!< sampler's location (for samplers only)
  };
  uint cbIdx_;             //!< constant buffer index
  uint cbPos_;             //!< dword address in CB for the argument
  std::string buf_;        //!< buffer tag
  uint index_;             //!< buffer/image/sampler index
  uint alignment_;         //!< the required argument's alignment
  ArgumentType dataType_;  //!< data type of the argument
  union {
    struct {
      uint uavBuf_ : 1;     //!< UAV memory, no global heap
      uint realloc_ : 1;    //!< argument has to be reallocatedin the global heap
      uint readOnly_ : 1;   //!< Read only memory object
      uint writeOnly_ : 1;  //!< Write only memory object
      uint readWrite_ : 1;  //!< Read/Write memory object
    };
    uint value_;
  } memory_;

  std::string typeName_;  //!< argument's type name
  uint typeQualifier_;    //!< argument's type qualifier

  //! Default constructor for the kernel argument
  KernelArg();

  //! Copy constructor for the kernel argument
  KernelArg(const KernelArg& data);

  //! Overloads operator=
  KernelArg& operator=(const KernelArg& data);

  //! Destructor of the kernel argument
  ~KernelArg() { name_.clear(); }

  /*! \brief Checks if this arguments requires a place in constant buffer
   *
   *  \return True if we need CB
   */
  bool isCbNeeded() const;

  /*! \brief Retrieves the argument's size
   *
   *  \return Size of the current argument
   */
  size_t size(bool gpuLayer  //!< True if we want the argument's size for the GPU layer
              ) const;

  /*! \brief Retrieves the argument's type for the abstraction layer
   *
   *  \return The argument's type in the abstraction layer format
   */
  clk_value_type_t type() const;

  /*! \brief Retrieves the argument's address qualifier for the abstraction layer
   *
   *  \return The argument's address qualifier in the abstraction layer format
   */
  cl_kernel_arg_address_qualifier addressQualifier() const;

  /*! \brief Retrieves the argument's access qualifier for the abstraction layer
   *
   *  \return The argument's access qualifier in the abstraction layer format
   */
  cl_kernel_arg_access_qualifier accessQualifier() const;

  /*! \brief Retrieves the argument's type name for the abstraction layer
   *
   *  \return The argument's type name
   */
  const char* typeName() const { return typeName_.c_str(); }

  /*! \brief Retrieves the argument's type qualifier for the abstraction layer
   *
   *  \return The argument's type qualifier
   */
  cl_kernel_arg_type_qualifier typeQualifier() const {
    switch (type_) {
      case PointerConst:
      case PointerHwConst:
        return static_cast<cl_kernel_arg_type_qualifier>(typeQualifier_ | CL_KERNEL_ARG_TYPE_CONST);
      default:
        return static_cast<cl_kernel_arg_type_qualifier>(typeQualifier_);
    }
  }

  //! Special case for vectors with component size <= 16bit
  const static uint VectorSizeLimit = 4;
  size_t specialVector() const;
};

struct DataTypeConst {
  const char* tagName_;           //!< data type's name
  KernelArg::ArgumentType type_;  //!< data type
};

//!  Metadata description for parsing
struct MetaDataConst {
  const char* typeName_;          //!< parameters name
  KernelArg::ArgumentType type_;  //!< type of argument
  struct {
    uint size_ : 1;      //!< number of arguments
    uint name_ : 1;      //!< argument's name
    uint resType_ : 1;   //!< argument's type
    uint cbIdx_ : 1;     //!< resource index CB, sampler or image
    uint cbPos_ : 1;     //!< dword address in CB for the argument
    uint buf_ : 1;       //!< buffer tag
    uint reserved : 26;  //!< reserved
  };
};

const uint DescTotal = 15;
const uint BasicTypeTotal = 15;
const uint ArgStateTotal = DescTotal + BasicTypeTotal;

//! The constant array that describes different metadata properties
extern const MetaDataConst ArgState[ArgStateTotal];

extern const DataTypeConst DataType[];

extern const uint DataTypeTotal;

// Forward declaration
class Program;
class NullProgram;

class CalImageReference : public amd::ReferenceCountedObject {
 public:
  //! Default constructor
  CalImageReference(CALimage calImage) : image_(calImage) {}

  //! Get CAL image
  CALimage calImage() const { return image_; }

 protected:
  //! Default destructor
  ~CalImageReference();

 private:
  //! Disable copy constructor
  CalImageReference(const CalImageReference&);

  //! Disable operator=
  CalImageReference& operator=(const CalImageReference&);

  CALimage image_;  //!< CAL kernel image
};

//! \class GPU NullKernel - Kernel for offline device
class NullKernel : public device::Kernel {
 public:
  typedef std::vector<KernelArg*> arguments_t;

  const static uint UavIdUndefined = 0xffff;

  enum Flags {
    LimitWorkgroup = 1 << 0,  //!< Limits the workgroup size
    PrintfOutput = 1 << 1,    //!< Kernel has printf output
    PrivateFixed = 1 << 2,    //!< Kernel has printf output
    ABI64bit = 1 << 3,        //!< Kernel has 64 bit ABI
    Unused0 = 1 << 4,         //!< Unused
    Unused1 = 1 << 5,         //!< Unused
    ImageEnable = 1 << 6,     //!< Kernel uses images
    ImageWrite = 1 << 7,      //!< Kernel writes images
  };

  //! \enum Resource type for binding
  enum ResourceType {
    Undefined = 0x00000000,            //!< resource type will be detected
    ConstantBuffer = 0x00000001,       //!< resource is a constant buffer
    GlobalBuffer = 0x00000002,         //!< resource is a global buffer
    ArgumentHeapBuffer = 0x00000004,   //!< resource is an argument buffer
    ArgumentBuffer = 0x00000005,       //!< resource is an argument buffer
    ArgumentImageRead = 0x00000006,    //!< resource is an argument image read
    ArgumentImageWrite = 0x00000007,   //!< resource is an argument image write
    ArgumentConstBuffer = 0x00000008,  //!< resource is an argument const buffer
    ArgumentCounter = 0x00000009,      //!< resource is a global counter
    ArgumentUavID = 0x0000000a,        //!< resource is a dummy ID read
    ArgumentCbID = 0x0000000b,         //!< resource is a constant buffer
    ArgumentPrintfID = 0x0000000c,     //!< resource is a printf buffer
  };

  //! GPU kernel constructor
  NullKernel(const std::string& name,       //!< The kernel's name
             const NullDevice& gpuNullDev,  //!< GPU device object
             const NullProgram& nullProg    //!< Reference to the program
             );

  virtual ~NullKernel();

  /*! \brief Creates a GPU kernel in CAL
   *
   *  \return True if we successfully created a kernel in CAL
   */
  bool create(const std::string& code,        //!< IL source code
              const std::string& metadata,    //!< the kernel metadata structure
              const void* binaryCode = NULL,  //!< binary machine code for CAL
              size_t binarySize = 0           //!< the machine code size
              );

  //! Returns CAL function descriptor
  CALimage calImage() const { return calRef_->calImage(); }

  //! Returns TRUE if we successfully retrieved the binary from CAL
  bool getCalBinary(void* binary,  //!< ISA binary code
                    size_t size    //!< ISA binary size
                    ) const;

  //! Returns CAL image size
  size_t getCalBinarySize() const;

  //! Returns GPU device object, associated with this kernel
  const NullDevice& nullDev() const { return gpuDev_; }

  //! Returns GPU device object, associated with this kernel
  const NullProgram& nullProg() const { return prog_; }

  //! Returns the kernel's build error
  const cl_int buildError() const { return buildError_; }

  //! Returns the kernel's flags
  uint flags() const { return flags_; }

  //! Returns TRUE if ABI is for 64 bits
  bool abi64Bit() const { return (flags_ & ABI64bit) ? true : false; }

  //! Returns the total number of all arguments
  size_t argSize() const { return arguments_.size(); }

  //! Returns instruction count of the current kernel
  uint instructionCnt() const { return instructionCnt_; }

 protected:
  /*! \brief Parses the metadata structure for the kernel,
   *   provided by the OpenCL compiler
   *
   *  \return True if we succefully parsed all arguments
   */
  bool parseArguments(const std::string& metaData,  //!< the program for parsing
                      uint* uavRefCount  //!< an array of reference counters for used UAVs
                      );

  //! Returns the argument for the specified index
  const KernelArg* argument(uint idx) const { return arguments_[idx]; }

  //! Adds the kernel argument into the list
  void addArgument(KernelArg* arg) { arguments_.push_back(arg); }

  //! Returns the argument for the specified sampler's index
  const KernelArg* sampler(uint idx) const { return intSamplers_[idx]; }

  //! Returns the total number of all internal samplers
  size_t samplerSize() const { return intSamplers_.size(); }

  //! Adds the kernel sampler into the sampler's list
  void addSampler(KernelArg* arg) { intSamplers_.push_back(arg); }

  //! Returns UAV raw index for this kernel
  uint uavRaw() const { return uavRaw_; }

  cl_int buildError_;     //!< Kernel's build error
  std::string ilSource_;  //!< IL source code of this kernel

  const NullDevice& gpuDev_;  //!< GPU device object
  const NullProgram& prog_;   //!< Reference to the parent program

  CalImageReference* calRef_;  //!< CAL image reference for this kernel
  bool internal_;              //!< Runtime internal ker

  uint flags_;               //!< kernel object flags
  arguments_t arguments_;    //!< kernel arguments for the execution
  arguments_t intSamplers_;  //!< predefined intenal kernel samplers

  size_t* cbSizes_;  //!< real constant buffer sizes for this kernel
  uint numCb_;       //!< total number of constant buffers

  uint uavRaw_;  //!< UAV used for RAW access

  bool rwAttributes_;  //!< backend provides RW attributes for arguments

  uint instructionCnt_;  //!< Instruction count

  uint cbId_;      //!< UAV used for constant buffer access
  uint printfId_;  //!< UAV used for printf buffer access

 private:
  //! Disable copy constructor
  NullKernel(const NullKernel&);

  //! Disable operator=
  NullKernel& operator=(const NullKernel&);

  //! Creates a filename for ISA/IL dumps
  std::string mkDumpName(const char* extension  //!< File extension to append
                         ) const;

  bool createMultiBinary(uint* imageSize,  //!< Multibinary image size
                         void** image,     //!< Multibinary image
                         const void* isa   //!< Kernel HW info
                         );

  //! SI HW specific setup for kernels
  bool siCreateHwInfo(const void* shader,          //!< HW info shader
                      AMUabiAddEncoding& encoding  //!< ABI encoding structure
                      );

  //! r800 HW specific setup for kernels
  bool r800CreateHwInfo(const void* shader,          //!< HW info shader
                        AMUabiAddEncoding& encoding  //!< ABI encoding structure
                        );
};

//! \class GPU kernel
class Kernel : public NullKernel {
 public:
  struct InitData {
    uint privateSize_;    //!< Private ring initial size
    uint localSize_;      //!< Local ring initial size
    uint hwPrivateSize_;  //!< HW private ring initial size
    uint hwLocalSize_;    //!< HW local ring initial size
    uint flags_;          //!< Kernel initialization flags
  };

  //! GPU kernel constructor
  Kernel(const std::string& name,   //!< The kernel's name
         const Device& gpuDev,      //!< GPU device object
         const Program& prog,       //!< Reference to the program
         const InitData* initData_  //!< Initialization data
         );

  //! GPU kernel destructor
  virtual ~Kernel();

  /*! \brief Creates a GPU kernel in CAL
   *
   *  \return True if we successfully created a kernel in CAL
   */
  bool create(const std::string& code,        //!< IL source code
              const std::string& metadata,    //!< the kernel metadata structure
              const void* binaryCode = NULL,  //!< binary machine code for CAL
              size_t binarySize = 0           //!< the machine code size
              );

  //! Initializes the CAL program grid for the kernel execution
  void setupProgramGrid(VirtualGPU& gpu,                    //!< virtual GPU device object
                        size_t workDim,                     //!< work dimension
                        const amd::NDRange& glbWorkOffset,  //!< global work offset
                        const amd::NDRange& gblWorkSize,    //!< global work size
                        amd::NDRange& lclWorkSize,          //!< local work size
                        const amd::NDRange& groupOffset,    //!< group offsets
                        const amd::NDRange& glbWorkOffsetOrg,
                        const amd::NDRange& glbWorkSizeOrg  //!< original global work size
                        ) const;

  /*! \brief Detects if runtime has to disable cache optimization and
   *   recompiles the kernel
   *
   *  \return True if aliases were detected in the kernel arguments
   */
  void processMemObjects(VirtualGPU& gpu,            //!< Virtual GPU objects - queue
                         const amd::Kernel& kernel,  //!< AMD kernel object for execution
                         const_address params,       //!< pointer to the param's store
                         bool nativeMem              //!< Native memory objects
                         ) const;

  /*! \brief Loads all kernel arguments, so we could run the kernel in HW.
   *  This includes CB update and resource binding
   *
   *  \return True if we succefully loaded the arguments
   */
  bool loadParameters(VirtualGPU& gpu,            //!< virtual GPU device object
                      const amd::Kernel& kernel,  //!< AMD kernel object for execution
                      const_address params,       //!< pointer to the param's store
                      bool nativeMem              //!< Native memory objects
                      ) const;

  //! Binds the constant buffers associated with the kernel
  bool bindConstantBuffers(VirtualGPU& gpu) const;

  /*! \brief Runs the kernel on HW
   *
   *  \return True if we succefully executed the kernel
   */
  bool run(VirtualGPU& gpu,     //!< virtual GPU device object
           GpuEvent* gpuEvent,  //!< Pointer to the GPU event
           bool lastRun,        //!< Last run in the split execution
           bool lastDoppCmd,    //!< for last dopp submission kernel dispatch
           bool pfpaDoppCmd     //!< for PFPA dopp submission kernel dispatch
           ) const;

  //! Help function to debug the kernel output
  void debug(VirtualGPU& gpu  //!< virtual GPU device object
             ) const;

  //! Programs internal samplers defined inside the kernel
  bool setInternalSamplers(VirtualGPU& gpu  //!< Virtual GPU device object
                           ) const;

  //! Returns TRUE if we successfully retrieved the binary from CAL
  bool getCalBinary(void* binary,  //!< ISA binary code
                    size_t size    //!< ISA binary size
                    ) const;

  //! Returns CAL image size
  size_t getCalBinarySize() const;

  //! Returns GPU device object, associated with this kernel
  const Device& dev() const;

  //! Returns GPU device object, associated with this kernel
  const Program& prog() const;

  //! Binds global HW constant buffers
  bool bindGlobalHwCb(VirtualGPU& gpu,                 //!< Virtual GPU device object
                      VirtualGPU::GslKernelDesc* desc  //!< Kernel descriptor
                      ) const;

 protected:
  //! Initializes the kernel parameters for the abstraction layer
  bool initParameters();

  /*! \brief Creates constant buffer resources, associated with the kernel
   *
   *  \return TRUE if we succefully created constant buffers
   */
  bool initConstBuffers();

 private:
  //! Disable copy constructor
  Kernel(const Kernel&);

  //! Disable operator=
  Kernel& operator=(const Kernel&);

  //! \enum Fixed Metadata offsets
  enum MetadataOffsets {
    GlobalWorkitemOffset = 0,
    LocalWorkitemOffset = 1,
    GroupsOffset = 2,
    PrivateRingOffset = 3,
    LocalRingOffset = 4,
    MathLibOffset = 5,
    GlobalWorkOffsetOffset = 6,
    GroupWorkOffsetOffset = 7,
    GlobalDataStoreOffset = 8,
    DebugOffset = 8,
    NDRangeGlobalWorkOffsetOffset = 9,

    // The total number of constants reserved for ABI
    TotalABIVectors
  };

  /*! \brief Sets the kernel argument
   *
   *  \return True if we succefully updated the arguments
   */
  bool setArgument(VirtualGPU& gpu,     //!< Virtual GPU device object
                   const amd::Kernel& kernel, //!< AMD kernel object
                   uint idx,            //!< the argument index
                   const_address params,//!< the arguments data
                   const amd::KernelParameterDescriptor& desc, //!< Argument's descriptor
                   bool nativeMem      //!< Native memory objects
                   ) const;

  /*! \brief Initializes local and private buffer ranges
   *
   *  \return True if we succefully initialized the ranges
   */
  bool initLocalPrivateRanges(VirtualGPU& gpu  //!< Virtual GPU device object
                              ) const;

  //! Sets local and private buffer ranges
  void setLocalPrivateRanges(VirtualGPU& gpu  //!< Virtual GPU device object
                             ) const;

  //! Sets the sampler's parameters for the image look-up
  void setSampler(VirtualGPU& gpu,  //!< virtual GPU device object
                  uint32_t state,   //!< sampler state
                  uint physUnit     //!< sampler's number
                  ) const;

  /*! \brief Binds resource
   *
   *  \return True if we succefully created constant buffers
   */
  bool bindResource(VirtualGPU& gpu,       //!< virtual GPU device object
                    const Memory& memory,  //!< memory for binding
                    uint paramIdx,         //!< index of the parameter
                    ResourceType type,     //!< resource type
                    uint physUnit,         //!< PhysUnit
                    size_t offset = 0) const;

  //! Unbinds all resources for the kernel
  void unbindResources(VirtualGPU& gpu,    //!< virtual GPU device object
                       GpuEvent gpuEvent,  //!< GPU event that will be associated with the resources
                       bool lastRun        //!< last run in the split execution
                       ) const;

  //! Copies image constants to the constant buffer
  void copyImageConstants(const amd::Image* amdImage,  //!< Abstraction layer image object
                          ImageConstants* imageData    //!< Pointer in CB to the image constants
                          ) const;

  //! Finds local workgroup size
  void findLocalWorkSize(size_t workDim,                   //!< Work dimension
                         const amd::NDRange& gblWorkSize,  //!< Global work size
                         amd::NDRange& lclWorkSize         //!< Local work size
                         ) const;

  uint hwPrivateSize_;  //!< initial HW private size
  uint hwLocalSize_;    //!< initial HW local size
};

enum HSAIL_ADDRESS_QUALIFIER {
  HSAIL_ADDRESS_ERROR = 0,
  HSAIL_ADDRESS_GLOBAL,
  HSAIL_ADDRESS_LOCAL,
  HSAIL_MAX_ADDRESS_QUALIFIERS
};

enum HSAIL_ARG_TYPE {
  HSAIL_ARGTYPE_ERROR = 0,
  HSAIL_ARGTYPE_POINTER,
  HSAIL_ARGTYPE_VALUE,
  HSAIL_ARGTYPE_IMAGE,
  HSAIL_ARGTYPE_SAMPLER,
  HSAIL_ARGTYPE_QUEUE,
  HSAIL_ARGMAX_ARG_TYPES
};

enum HSAIL_DATA_TYPE {
  HSAIL_DATATYPE_ERROR = 0,
  HSAIL_DATATYPE_B1,
  HSAIL_DATATYPE_B8,
  HSAIL_DATATYPE_B16,
  HSAIL_DATATYPE_B32,
  HSAIL_DATATYPE_B64,
  HSAIL_DATATYPE_S8,
  HSAIL_DATATYPE_S16,
  HSAIL_DATATYPE_S32,
  HSAIL_DATATYPE_S64,
  HSAIL_DATATYPE_U8,
  HSAIL_DATATYPE_U16,
  HSAIL_DATATYPE_U32,
  HSAIL_DATATYPE_U64,
  HSAIL_DATATYPE_F16,
  HSAIL_DATATYPE_F32,
  HSAIL_DATATYPE_F64,
  HSAIL_DATATYPE_STRUCT,
  HSAIL_DATATYPE_OPAQUE,
  HSAIL_DATATYPE_MAX_TYPES
};

enum HSAIL_ACCESS_TYPE {
  HSAIL_ACCESS_TYPE_NONE = 0,
  HSAIL_ACCESS_TYPE_RO,
  HSAIL_ACCESS_TYPE_WO,
  HSAIL_ACCESS_TYPE_RW
};

class HSAILKernel : public device::Kernel {
 public:
  struct Argument {
    std::string name_;                  //!< Argument's name
    std::string typeName_;              //!< Argument's type name
    uint size_;                         //!< Size in bytes
    uint offset_;                       //!< Argument's offset
    uint alignment_;                    //!< Argument's alignment
    HSAIL_ARG_TYPE type_;               //!< Type of the argument
    HSAIL_ADDRESS_QUALIFIER addrQual_;  //!< Address qualifier of the argument
    HSAIL_DATA_TYPE dataType_;          //!< The type of data
    uint numElem_;                      //!< Number of elements
    HSAIL_ACCESS_TYPE access_;          //!< Access type for the argument
  };

  // Max number of possible extra (hidden) kernel arguments
  static const uint MaxExtraArgumentsNum = 6;

  HSAILKernel(std::string name, HSAILProgram* prog, std::string compileOptions, uint extraArgsNum);

  virtual ~HSAILKernel();

  //! Initializes the metadata required for this kernel,
  //! finalizes the kernel if needed
  bool init(amd::hsa::loader::Symbol* sym, bool finalize = false);

  //! Returns a pointer to the hsail argument
  const Argument* argument(size_t i) const { return arguments_[i]; }

  //! Returns the number of hsail arguments
  size_t numArguments() const { return arguments_.size(); }

  //! Returns GPU device object, associated with this kernel
  const Device& dev() const;

  //! Returns HSA program associated with this kernel
  const HSAILProgram& prog() const;

  //! Returns LDS size used in this kernel
  uint32_t ldsSize() const { return cpuAqlCode_->workgroup_group_segment_byte_size; }

  //! Returns pointer on CPU to AQL code info
  const void* cpuAqlCode() const { return cpuAqlCode_; }

  //! Returns memory object with AQL code
  gpu::Memory* gpuAqlCode() const { return code_; }

  //! Returns size of AQL code
  size_t aqlCodeSize() const { return codeSize_; }

  //! Returns the size of argument buffer
  size_t argsBufferSize() const { return cpuAqlCode_->kernarg_segment_byte_size; }

  //! Returns spill reg size per workitem
  int spillSegSize() const { return cpuAqlCode_->workitem_private_segment_byte_size; }

  //! Returns AQL packet in CPU memory
  //! if the kerenl arguments were successfully loaded, otherwise NULL
  hsa_kernel_dispatch_packet_t* loadArguments(
      VirtualGPU& gpu,                     //!< Running GPU context
      const amd::Kernel& kernel,           //!< AMD kernel object
      const amd::NDRangeContainer& sizes,  //!< NDrange container
      const_address parameters,            //!< Application arguments for the kernel
      bool nativeMem,                      //!< Native memory objectes are passed
      uint64_t vmDefQueue,                 //!< GPU VM default queue pointer
      uint64_t* vmParentWrap,              //!< GPU VM parent aql wrap object
      std::vector<const Memory*>& memList  //!< Memory list for GSL/VidMM handles
      ) const;

  //! Returns the kernel index in the program
  uint index() const { return index_; }

  //! Returns kernel's extra argument count
  uint extraArgumentsNum() const { return extraArgumentsNum_; }

 private:
  //! Disable copy constructor
  HSAILKernel(const HSAILKernel&);

  //! Disable operator=
  HSAILKernel& operator=(const HSAILKernel&);

  //! Creates AQL kernel HW info
  bool aqlCreateHWInfo(amd::hsa::loader::Symbol* sym);

  //! Initializes arguments_ and the abstraction layer kernel parameters
  void initArgList(const aclArgData* aclArg  //!< List of ACL arguments
                   );

  //! Initializes Hsail Argument metadata and info
  void initHsailArgs(const aclArgData* aclArg  //!< List of ACL arguments
                     );

  std::vector<Argument*> arguments_;  //!< Vector list of HSAIL Arguments
  std::string compileOptions_;        //!< compile used for finalizing this kernel
  amd_kernel_code_t* cpuAqlCode_;     //!< AQL kernel code on CPU
  const HSAILProgram& prog_;          //!< Reference to the parent program
  uint index_;                        //!< Kernel index in the program

  gpu::Memory* code_;  //!< Memory object with ISA code
  size_t codeSize_;    //!< Size of ISA code

  char* hwMetaData_;  //!< SI metadata

  uint extraArgumentsNum_;  //! Number of extra (hidden) kernel arguments
};

/*@}*/} // namespace gpu

#endif /*GPUKERNEL_HPP_*/