/*
 * Copyright (C) 2018 Intel Corporation
 *
 * SPDX-License-Identifier: MIT
 *
 */

#include "runtime/command_stream/command_stream_receiver_hw.h"
#include "runtime/command_stream/experimental_command_buffer.h"
#include "runtime/command_stream/linear_stream.h"
#include "runtime/helpers/hw_helper.h"
#include "runtime/memory_manager/graphics_allocation.h"

namespace OCLRT {

template <typename GfxFamily>
void ExperimentalCommandBuffer::injectBufferStart(LinearStream &parentStream, size_t cmdBufferOffset) {
    using MI_BATCH_BUFFER_START = typename GfxFamily::MI_BATCH_BUFFER_START;
    auto pCmd = static_cast<MI_BATCH_BUFFER_START *>(parentStream.getSpace(sizeof(MI_BATCH_BUFFER_START)));
    auto commandStreamReceiverHw = reinterpret_cast<CommandStreamReceiverHw<GfxFamily> *>(commandStreamReceiver);
    commandStreamReceiverHw->addBatchBufferStart(pCmd, currentStream->getGraphicsAllocation()->getGpuAddress() + cmdBufferOffset, true);
}

template <typename GfxFamily>
size_t ExperimentalCommandBuffer::getRequiredInjectionSize() noexcept {
    using MI_BATCH_BUFFER_START = typename GfxFamily::MI_BATCH_BUFFER_START;
    return sizeof(MI_BATCH_BUFFER_START);
}

template <typename GfxFamily>
size_t ExperimentalCommandBuffer::programExperimentalCommandBuffer() {
    using MI_BATCH_BUFFER_END = typename GfxFamily::MI_BATCH_BUFFER_END;

    getCS(getTotalExperimentalSize<GfxFamily>());

    size_t returnOffset = currentStream->getUsed();

    //begin timestamp
    addTimeStampPipeControl<GfxFamily>();

    addExperimentalCommands<GfxFamily>();

    //end timestamp
    addTimeStampPipeControl<GfxFamily>();

    //end
    auto pCmd = static_cast<MI_BATCH_BUFFER_END *>(currentStream->getSpace(sizeof(MI_BATCH_BUFFER_END)));
    *pCmd = GfxFamily::cmdInitBatchBufferEnd;

    return returnOffset;
}

template <typename GfxFamily>
size_t ExperimentalCommandBuffer::getTotalExperimentalSize() noexcept {
    using MI_BATCH_BUFFER_END = typename GfxFamily::MI_BATCH_BUFFER_END;

    size_t size = sizeof(MI_BATCH_BUFFER_END) + getTimeStampPipeControlSize<GfxFamily>() + getExperimentalCommandsSize<GfxFamily>();
    return size;
}

template <typename GfxFamily>
size_t ExperimentalCommandBuffer::getTimeStampPipeControlSize() noexcept {
    using PIPE_CONTROL = typename GfxFamily::PIPE_CONTROL;

    //two P_C for timestamps, two prior them for WA - Enable CS Stall
    return 4 * sizeof(PIPE_CONTROL);
}

template <typename GfxFamily>
void ExperimentalCommandBuffer::addTimeStampPipeControl() {
    using PIPE_CONTROL = typename GfxFamily::PIPE_CONTROL;

    auto pCmd = static_cast<PIPE_CONTROL *>(currentStream->getSpace(sizeof(PIPE_CONTROL)));
    *pCmd = GfxFamily::cmdInitPipeControl;
    pCmd->setCommandStreamerStallEnable(true);

    uint64_t timeStampAddress = timestamps->getGpuAddress() + timestampsOffset;

    PipeControlHelper<GfxFamily>::obtainPipeControlAndProgramPostSyncOperation(currentStream.get(), PIPE_CONTROL::POST_SYNC_OPERATION_WRITE_TIMESTAMP, timeStampAddress, 0llu);

    //moving to next chunk
    timestampsOffset += sizeof(uint64_t);

    DEBUG_BREAK_IF(timestamps->getUnderlyingBufferSize() < timestampsOffset);
}

template <typename GfxFamily>
void ExperimentalCommandBuffer::addExperimentalCommands() {
    using MI_SEMAPHORE_WAIT = typename GfxFamily::MI_SEMAPHORE_WAIT;

    uintptr_t semaphoreAddr = reinterpret_cast<uintptr_t>(experimentalAllocation->getUnderlyingBuffer()) + experimentalAllocationOffset;
    uint32_t *semaphoreData = reinterpret_cast<uint32_t *>(semaphoreAddr);
    *semaphoreData = 1;
    uint64_t gpuAddr = experimentalAllocation->getGpuAddress() + experimentalAllocationOffset;

    auto semaphoreCmd = reinterpret_cast<MI_SEMAPHORE_WAIT *>(currentStream->getSpace(sizeof(MI_SEMAPHORE_WAIT)));
    *semaphoreCmd = MI_SEMAPHORE_WAIT::sInit();
    semaphoreCmd->setCompareOperation(MI_SEMAPHORE_WAIT::COMPARE_OPERATION_SAD_EQUAL_SDD);
    semaphoreCmd->setSemaphoreDataDword(*semaphoreData);
    semaphoreCmd->setSemaphoreGraphicsAddress(gpuAddr);
}

template <typename GfxFamily>
size_t ExperimentalCommandBuffer::getExperimentalCommandsSize() noexcept {
    using MI_SEMAPHORE_WAIT = typename GfxFamily::MI_SEMAPHORE_WAIT;
    return sizeof(MI_SEMAPHORE_WAIT);
}

} // namespace OCLRT
