rocm-systems/rocclr/runtime/platform/kernel.hpp

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

#ifndef KERNEL_HPP_
#define KERNEL_HPP_

#include "top.hpp"
#include "platform/object.hpp"

#include "amdocl/cl_kernel.h"

#include <vector>
#include <cstdlib>  // for malloc
#include <string>
#include "device/device.hpp"

enum FGSStatus {
  FGS_DEFAULT,  //!< The default kernel fine-grained system pointer support
  FGS_NO,       //!< no support of kernel fine-grained system pointer
  FGS_YES       //!< have support of kernel fine-grained system pointer
};

namespace amd {

class Symbol;
class Program;

/*! \addtogroup Runtime
 *  @{
 *
 *  \addtogroup Program Programs and Kernel functions
 *  @{
 */

class KernelSignature : public HeapObject {
 private:
  std::vector<KernelParameterDescriptor> params_;
  size_t paramsSize_;
  std::string attributes_;  //!< The kernel attributes

 public:
  //! Default constructor
  KernelSignature() : paramsSize_(0) {}

  //! Construct a new signature.
  KernelSignature(const std::vector<KernelParameterDescriptor>& params, const std::string& attrib);

  //! Return the number of parameters
  size_t numParameters() const { return params_.size(); }

  //! Return the parameter descriptor at the given index.
  const KernelParameterDescriptor& at(size_t index) const {
    assert(index < params_.size() && "index is out of bounds");
    return params_[index];
  }

  //! Return the size in bytes required for the arguments on the stack.
  size_t paramsSize() const { return paramsSize_; }

  //! Return the kernel attributes
  const std::string& attributes() const { return attributes_; }
};

// @todo: look into a copy-on-write model instead of copy-on-read.
//
class KernelParameters : protected HeapObject {
 private:
  //! The signature describing these parameters.
  const KernelSignature& signature_;

  address values_;                      //!< pointer to the base of the values stack.
  bool* defined_;                       //!< pointer to the isDefined flags.
  bool* svmBound_;                      //!< True at 'i' if parameter 'i' is bound to SVM pointer
  size_t execInfoOffset_;               //!< The offset of execInfo
  std::vector<void*> execSvmPtr_;       //!< The non argument svm pointers for kernel
  FGSStatus svmSystemPointersSupport_;  //!< The flag for the status of the kernel
                                        //   support of fine-grain system sharing.
  struct {
    uint32_t validated_ : 1;     //!< True if all parameters are defined.
    uint32_t execNewVcop_ : 1;   //!< special new VCOP for kernel execution
    uint32_t execPfpaVcop_ : 1;  //!< special PFPA VCOP for kernel execution
    uint32_t unused : 29;        //!< unused
  };

 public:
  //! Construct a new instance of parameters for the given signature.
  KernelParameters(const KernelSignature& signature)
      : signature_(signature),
        execInfoOffset_(0),
        svmSystemPointersSupport_(FGS_DEFAULT),
        validated_(0),
        execNewVcop_(0),
        execPfpaVcop_(0) {
    values_ = (address) this + alignUp(sizeof(KernelParameters), 16);
    defined_ = (bool*)(values_ + signature.paramsSize());
    svmBound_ = (bool*)((address)defined_ + signature.numParameters() * sizeof(bool));

    address limit = (address)&svmBound_[signature.numParameters()];
    ::memset(values_, '\0', limit - values_);
  }

  //! Reset the parameter at the given \a index (becomes undefined).
  void reset(size_t index) {
    defined_[index] = false;
    svmBound_[index] = false;
    validated_ = 0;
  }
  //! Set the parameter at the given \a index to the value pointed by \a value
  // \a svmBound indicates that \a value is a SVM pointer.
  void set(size_t index, size_t size, const void* value, bool svmBound = false);

  //! Return true if the parameter at the given \a index is defined.
  bool test(size_t index) const { return defined_[index]; }

  //! Return true if all the parameters have been defined.
  bool check();

  //! The amount of memory required for local memory needed
  size_t localMemSize(size_t minDataTypeAlignment) const;

  //! Capture the state of the parameters and return the stack base pointer.
  address capture(const Device& device);
  //! Release the captured state of the parameters.
  void release(address parameters, const amd::Device& device) const;

  //! Allocate memory for this instance as well as the required storage for
  //  the values_, defined_, and svmBound_ arrays.
  void* operator new(size_t size, const KernelSignature& signature) {
    size_t requiredSize =
        alignUp(size, 16) + signature.paramsSize() + signature.numParameters() * sizeof(bool) * 2;
    return AlignedMemory::allocate(requiredSize, PARAMETERS_MIN_ALIGNMENT);
  }
  //! Deallocate the memory reserved for this instance.
  void operator delete(void* ptr) { AlignedMemory::deallocate(ptr); }

  //! Deallocate the memory reserved for this instance,
  // matching overloaded operator new.
  void operator delete(void* ptr, const KernelSignature& signature) {
    AlignedMemory::deallocate(ptr);
  }

  //! Returns raw kernel parameters without capture
  address values() const { return values_; }

  //! Return true if the captured parameter at the given \a index is bound to
  // SVM pointer.
  bool boundToSvmPointer(const Device& device, const_address capturedAddress, size_t index) const;
  //! add the svmPtr execInfo into container
  void addSvmPtr(void* const* execInfoArray, size_t count) {
    execSvmPtr_.clear();
    for (size_t i = 0; i < count; i++) {
      execSvmPtr_.push_back(execInfoArray[i]);
    }
  }
  //! get the number of svmPtr in the execInfo container
  size_t getNumberOfSvmPtr() const { return execSvmPtr_.size(); }

  //! get the number of svmPtr in the execInfo container
  size_t getExecInfoOffset() const { return execInfoOffset_; }

  //! set the status of kernel support fine-grained SVM system pointer sharing
  void setSvmSystemPointersSupport(FGSStatus svmSystemSupport) {
    svmSystemPointersSupport_ = svmSystemSupport;
  }

  //! return the status of kernel support fine-grained SVM system pointer sharing
  FGSStatus getSvmSystemPointersSupport() const { return svmSystemPointersSupport_; }

  //! set the new VCOP in the execInfo container
  void setExecNewVcop(const bool newVcop) { execNewVcop_ = (newVcop == true); }

  //! set the PFPA VCOP in the execInfo container
  void setExecPfpaVcop(const bool pfpaVcop) { execPfpaVcop_ = (pfpaVcop == true); }

  //! get the new VCOP in the execInfo container
  bool getExecNewVcop() const { return (execNewVcop_ == 1); }

  //! get the PFPA VCOP in the execInfo container
  bool getExecPfpaVcop() const { return (execPfpaVcop_ == 1); }
};

/*! \brief Encapsulates a __kernel function and the argument values
 *  to be used when invoking this function.
 */
class Kernel : public RuntimeObject {
 private:
  //! The program where this kernel is defined.
  SharedReference<Program> program_;

  const Symbol& symbol_;          //!< The symbol for this kernel.
  std::string name_;              //!< The kernel's name.
  KernelParameters* parameters_;  //!< The parameters.

 protected:
  //! Destroy this kernel
  ~Kernel();

 public:
  /*! \brief Construct a kernel object from the __kernel function
   *  \a kernelName in the given \a program.
   */
  Kernel(Program& program, const Symbol& symbol, const std::string& name);

  //! Return the program containing this kernel.
  Program& program() const { return program_(); }

  //! Return this kernel's signature.
  const KernelSignature& signature() const;

  //! Return the kernel entry point for the given device.
  const device::Kernel* getDeviceKernel(const Device& device,  //!< Device object
                                        bool noAlias = true    //!< Controls alias optimization
                                        ) const;

  //! Return the parameters.
  KernelParameters& parameters() const { return *parameters_; }

  //! Return the kernel's name.
  const std::string& name() const { return name_; }

  virtual ObjectType objectType() const { return ObjectTypeKernel; }
};

/*! @}
 *  @}
 */

}  // namespace amd

#endif /*KERNEL_HPP_*/