/*
// Copyright (c) 2018 Intel Corporation
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
*/

#include "convolution_kernel_mmad_batched_block.h"
#include "kernel_selector_utils.h"

namespace kernel_selector {
    
    ParamsKey ConvolutionKernel_mmad_batched_block::GetSupportedKey() const
    {
        ParamsKey k;
        k.EnableInputDataType(Datatype::INT8);
        k.EnableOutputDataType(Datatype::INT8);
        k.EnableInputWeightsType(WeightsType::INT8);
        k.EnableInputLayout(DataLayout::fs_bs_yx_bsv4_fsv32);
        k.EnableOutputLayout(DataLayout::fs_bs_yx_bsv4_fsv32);
        k.EnableTensorOffset();
        k.EnableTensorPitches();
        k.EnableBiasPerFeature();
        k.EnableBatching();
        k.EnableInt8Quantization();
        k.EnableOutputCalibration();
        k.DisableTuning();
        return k;
    }

    struct block_params
    {
        int32_t out_width;
        int32_t out_height;
        int32_t out_depth;
    };

    static block_params get_out_block_size(const convolution_params& p)
    {
        if (p.filterSize.x == 3 && p.filterSize.y == 3)
        {
            if (p.output.X().v == 7)
                return { 7, 1, 4 };
            else if (p.output.X().v == 14)
                return { 7, 1, 4 };
            else if (p.output.X().v == 28)
                return { 7, 1, 4 };
            else if (p.output.X().v == 56)
                return { 8, 1, 4 };
        }

        return { 1,1,1 };
    }

    std::vector<WeightsLayout> ConvolutionKernel_mmad_batched_block::GetSupportedWeightLayouts(const convolution_params& cp) const
    {
        auto block = get_out_block_size(cp);
        if (block.out_depth == 4)
            return { WeightsLayout::os_is_yx_isa8_osv8_isv4_swizzled_by_4 };
        else
            return { WeightsLayout::os_is_yx_isa8_osv8_isv4 };
    }

    bool ConvolutionKernel_mmad_batched_block::Validate(const Params& p, const optional_params& o) const
    {
        if (!ConvolutionKernelBase::Validate(p, o) ||
            !CovolutionCheckInput(p, o))
        {
            return false;
        }
        const convolution_params& cp = static_cast<const convolution_params&>(p);

        // if block sizes are 1x1, then this algorithm is probably not the best
        auto block = get_out_block_size(cp);
        if (block.out_width == 1 && block.out_height == 1)
            return false;

        if (cp.output.X().v % block.out_width != 0)
            return false;
        if (cp.output.Y().v % block.out_height != 0)
            return false;

        if (cp.filterSize.x == 1)
            return false;

        return true;
    }

    ConvolutionKernelBase::DispatchData ConvolutionKernel_mmad_batched_block::SetDefault(const convolution_params& arg, int) const
    {
        DispatchData runInfo = ConvolutionKernelBase::SetDefault(arg);

        constexpr size_t sub_group_size = 8;

        runInfo.effiency = FORCE_PRIORITY_5;

        auto block = get_out_block_size(arg);

        runInfo.gws0 = arg.output.X().v / block.out_width;
        runInfo.gws1 = arg.output.Y().v / block.out_height;
        runInfo.gws2 = (arg.output.Feature().v) * ((arg.output.Batch().v+3) / 4) / block.out_depth; // process 4 output channels per Workitem

        runInfo.lws0 = 1;
        runInfo.lws1 = 1;
        runInfo.lws2 = sub_group_size;

        return runInfo;
    }

    JitConstants ConvolutionKernel_mmad_batched_block::GetJitConstants(const convolution_params& params, const DispatchData& runInfo) const
    {
        auto jit = Parent::GetJitConstants(params, runInfo);

        jit.AddConstant(MakeJitConstant("SUB_GROUP_SIZE", runInfo.lws2));

        // pitch for special block format used in this kernel
        const size_t ifm_32_aligned = Align(params.weights.IFM().v, 32);
        const size_t filter_ofm_block_pitch = (ifm_32_aligned / 32) * params.weights.X().v * params.weights.Y().v * 4 * 8 * 8;
        jit.AddConstant(MakeJitConstant("FILTER_OFM_BLOCK_PITCH", filter_ofm_block_pitch));

        const size_t in_x_pitch = 32 * 4;
        const size_t in_y_pitch = 32 * 4 * params.inputs[0].X().LogicalDimPadded();
        const size_t in_b_block_pitch = in_y_pitch * params.inputs[0].Y().LogicalDimPadded();
        const size_t in_f_block_pitch = in_b_block_pitch * ((params.inputs[0].Batch().v + 3) / 4);
        const size_t in_offset = in_x_pitch * params.inputs[0].X().pad.before + in_y_pitch * params.inputs[0].Y().pad.before;

        jit.AddConstant(MakeJitConstant("IN_X_PITCH", in_x_pitch));
        jit.AddConstant(MakeJitConstant("IN_Y_PITCH", in_y_pitch));
        jit.AddConstant(MakeJitConstant("IN_B_BLOCK_PITCH", in_b_block_pitch));
        jit.AddConstant(MakeJitConstant("IN_F_BLOCK_PITCH", in_f_block_pitch));
        jit.AddConstant(MakeJitConstant("IN_OFFSET", in_offset));

        auto block = get_out_block_size(params);
        jit.AddConstant(MakeJitConstant("OUT_BLOCK_WIDTH", block.out_width));
        jit.AddConstant(MakeJitConstant("OUT_BLOCK_HEIGHT", block.out_height));
        jit.AddConstant(MakeJitConstant("WEIGHTS_PER_WORKITEM", block.out_depth));

        return jit;
    }

    KernelsData ConvolutionKernel_mmad_batched_block::GetKernelsData(const Params& params, const optional_params& options) const
    {
        KernelsData kd = GetCommonKernelsData(params, options);
        if(!kd.empty())
            kd[0].estimatedTime = FORCE_PRIORITY_5;
        return kd;
    }
}