/* Copyright (c) 2017 - 2021 Advanced Micro Devices, Inc.

 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. */

#ifndef ROCCOUNTERS_HPP_
#define ROCCOUNTERS_HPP_

#include "top.hpp"
#include "device/device.hpp"
#include "device/rocm/rocdevice.hpp"
#include "hsa_ven_amd_aqlprofile.h"

namespace roc {

class VirtualGPU;
class PerfCounterProfile;

//! Performance counter implementation on GPU
class PerfCounter : public device::PerfCounter {
 public:
  enum {
    ROC_UNSUPPORTED = 0,
    ROC_GFX8,
    ROC_GFX9,
    ROC_GFX10
  };

  //! The performance counter info
  struct Info : public amd::EmbeddedObject {
    uint blockIndex_;    //!< Index of the block to configure
    uint counterIndex_;  //!< Index of the hardware counter
    uint eventIndex_;    //!< Event you wish to count with the counter
  };

  //! Constructor for the ROC PerfCounter object
  PerfCounter(const Device& device,     //!< A ROC device object
              uint32_t blockIndex,       //!< HW block index
              uint32_t counterIndex,     //!< Counter index (Counter register) within the block
              uint32_t eventIndex);      //!< Event index (Counter selection) for profiling

  //! Destructor for the ROCM PerfCounter object
  virtual ~PerfCounter();


  //! Returns the specific information about the counter
  uint64_t getInfo(uint64_t infoType            //!< The type of returned information
                   ) const;

  //! Returns the GPU device, associated with the current object
  const Device& dev() const { return roc_device_; }

  //! Returns the gfx version
  const uint32_t gfxVersion() const { return gfxVersion_; }

  //! Returns the profile reference
  PerfCounterProfile*  profileRef() const { return profileRef_; }

  //! Update the profile associated with the counter
  void  setProfile(PerfCounterProfile* profileRef);

 private:

  //! Disable default copy constructor
  PerfCounter(const PerfCounter&);

  //! Disable default operator=
  PerfCounter& operator=(const PerfCounter&);

  //! Returns the ROC performance counter descriptor
  const Info* info() const { return &info_; }

  const Device& roc_device_;   //!< The backend device
  Info info_;                 //!< The info structure for perfcounter

  hsa_ven_amd_aqlprofile_event_t event_;  //!< event information
  PerfCounterProfile*  profileRef_;   //!< perf counter profile object

  uint32_t gfxVersion_;       //!< The IP version of the device
};

//! Performance counter profile
class PerfCounterProfile : public amd::ReferenceCountedObject {
 public:
  //! Default constructor
  PerfCounterProfile(const Device& device)
    : api_({0}),
      roc_device_(device) {

    memset(&profile_, 0, sizeof(profile_));
    profile_.agent = roc_device_.getBackendDevice();
    profile_.type = HSA_VEN_AMD_AQLPROFILE_EVENT_TYPE_PMC;

    memset(&prePacket_, 0, sizeof(hsa_ext_amd_aql_pm4_packet_t));
    memset(&postPacket_, 0, sizeof(hsa_ext_amd_aql_pm4_packet_t));
    memset(&completionSignal_, 0, sizeof(hsa_signal_t));
  };

  //! Destructor for the PerfCounter profile object
  virtual ~PerfCounterProfile();

  //! Get the API tables
  bool Create() {
    hsa_agent_t agent = roc_device_.getBackendDevice();
    bool system_support, agent_support;
    hsa_system_extension_supported(HSA_EXTENSION_AMD_AQLPROFILE, 1, 0, &system_support);
    hsa_agent_extension_supported(HSA_EXTENSION_AMD_AQLPROFILE, agent, 1, 0, &agent_support);
    if (!system_support || !agent_support) {
      return false;
    }

    if (hsa_system_get_major_extension_table(HSA_EXTENSION_AMD_AQLPROFILE,
        hsa_ven_amd_aqlprofile_VERSION_MAJOR, sizeof(hsa_ven_amd_aqlprofile_pfn_t),
        &api_) != HSA_STATUS_SUCCESS) {
      return false;
    }

    return true;
  };

  //! Returns the performance counter vector
  std::vector<PerfCounter*> perfCounters() { return perfCounters_; };

  //! Add the event of performance counter object to the profile context object
  void addEvent(hsa_ven_amd_aqlprofile_event_t event) { events_.push_back(event); };

  //! Create the start packet for performance counter
  hsa_ext_amd_aql_pm4_packet_t* createStartPacket();

  //! Create the stop packet for performance counter
  hsa_ext_amd_aql_pm4_packet_t* createStopPacket();

  //! Create the profile context object
  bool initialize();  //!< HSA profile context object

  //! Return the extension API table
  const hsa_ven_amd_aqlprofile_1_00_pfn_t* api() const { return &api_; }

  //! Return the profile context object
  const hsa_ven_amd_aqlprofile_profile_t* profile() const { return &profile_; }

  //! Return the start AQL packet
  hsa_ext_amd_aql_pm4_packet_t* prePacket() { return &prePacket_; }

  //! Return the stop AQL packet
  hsa_ext_amd_aql_pm4_packet_t* postPacket() { return &postPacket_; }

 private:

  //! Disable copy constructor
  PerfCounterProfile(const PerfCounterProfile&);

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

  hsa_ven_amd_aqlprofile_1_00_pfn_t api_;   //!< The extension API table
  const Device& roc_device_;  //!< The backend device

  std::vector<PerfCounter*>  perfCounters_;    //!< Perf counters associate with the profile
  std::vector<hsa_ven_amd_aqlprofile_event_t>  events_;  //!< Events information

  hsa_ven_amd_aqlprofile_profile_t  profile_; //!< HSA profile context object
  hsa_ext_amd_aql_pm4_packet_t  prePacket_;   //!< aql packet for starting perf counter
  hsa_ext_amd_aql_pm4_packet_t  postPacket_;  //!< aql packet for stoping the perf counter

  hsa_signal_t completionSignal_;     //!< signal of completion

};

}  // namespace roc

#endif  // ROCCOUNTERS_HPP_