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// Copyright (c) Facebook, Inc. and its affiliates.
#pragma once
#include <torch/types.h>

namespace detectron2 {

#if defined(WITH_CUDA) || defined(WITH_HIP)
int deform_conv_forward_cuda(
    at::Tensor input,
    at::Tensor weight,
    at::Tensor offset,
    at::Tensor output,
    at::Tensor columns,
    at::Tensor ones,
    int kW,
    int kH,
    int dW,
    int dH,
    int padW,
    int padH,
    int dilationW,
    int dilationH,
    int group,
    int deformable_group,
    int im2col_step);

int deform_conv_backward_input_cuda(
    at::Tensor input,
    at::Tensor offset,
    at::Tensor gradOutput,
    at::Tensor gradInput,
    at::Tensor gradOffset,
    at::Tensor weight,
    at::Tensor columns,
    int kW,
    int kH,
    int dW,
    int dH,
    int padW,
    int padH,
    int dilationW,
    int dilationH,
    int group,
    int deformable_group,
    int im2col_step);

int deform_conv_backward_parameters_cuda(
    at::Tensor input,
    at::Tensor offset,
    at::Tensor gradOutput,
    at::Tensor gradWeight, // at::Tensor gradBias,
    at::Tensor columns,
    at::Tensor ones,
    int kW,
    int kH,
    int dW,
    int dH,
    int padW,
    int padH,
    int dilationW,
    int dilationH,
    int group,
    int deformable_group,
    float scale,
    int im2col_step);

void modulated_deform_conv_cuda_forward(
    at::Tensor input,
    at::Tensor weight,
    at::Tensor bias,
    at::Tensor ones,
    at::Tensor offset,
    at::Tensor mask,
    at::Tensor output,
    at::Tensor columns,
    int kernel_h,
    int kernel_w,
    const int stride_h,
    const int stride_w,
    const int pad_h,
    const int pad_w,
    const int dilation_h,
    const int dilation_w,
    const int group,
    const int deformable_group,
    const bool with_bias);

void modulated_deform_conv_cuda_backward(
    at::Tensor input,
    at::Tensor weight,
    at::Tensor bias,
    at::Tensor ones,
    at::Tensor offset,
    at::Tensor mask,
    at::Tensor columns,
    at::Tensor grad_input,
    at::Tensor grad_weight,
    at::Tensor grad_bias,
    at::Tensor grad_offset,
    at::Tensor grad_mask,
    at::Tensor grad_output,
    int kernel_h,
    int kernel_w,
    int stride_h,
    int stride_w,
    int pad_h,
    int pad_w,
    int dilation_h,
    int dilation_w,
    int group,
    int deformable_group,
    const bool with_bias);

#endif

inline int deform_conv_forward(
    at::Tensor input,
    at::Tensor weight,
    at::Tensor offset,
    at::Tensor output,
    at::Tensor columns,
    at::Tensor ones,
    int kW,
    int kH,
    int dW,
    int dH,
    int padW,
    int padH,
    int dilationW,
    int dilationH,
    int group,
    int deformable_group,
    int im2col_step) {
  if (input.is_cuda()) {
#if defined(WITH_CUDA) || defined(WITH_HIP)
    TORCH_CHECK(weight.is_cuda(), "weight tensor is not on GPU!");
    TORCH_CHECK(offset.is_cuda(), "offset tensor is not on GPU!");
    return deform_conv_forward_cuda(
        input,
        weight,
        offset,
        output,
        columns,
        ones,
        kW,
        kH,
        dW,
        dH,
        padW,
        padH,
        dilationW,
        dilationH,
        group,
        deformable_group,
        im2col_step);
#else
    AT_ERROR("Detectron2 is not compiled with GPU support!");
#endif
  }
  AT_ERROR("This operator is not implemented on CPU");
}

inline int deform_conv_backward_input(
    at::Tensor input,
    at::Tensor offset,
    at::Tensor gradOutput,
    at::Tensor gradInput,
    at::Tensor gradOffset,
    at::Tensor weight,
    at::Tensor columns,
    int kW,
    int kH,
    int dW,
    int dH,
    int padW,
    int padH,
    int dilationW,
    int dilationH,
    int group,
    int deformable_group,
    int im2col_step) {
  if (gradOutput.is_cuda()) {
#if defined(WITH_CUDA) || defined(WITH_HIP)
    TORCH_CHECK(input.is_cuda(), "input tensor is not on GPU!");
    TORCH_CHECK(weight.is_cuda(), "weight tensor is not on GPU!");
    TORCH_CHECK(offset.is_cuda(), "offset tensor is not on GPU!");
    return deform_conv_backward_input_cuda(
        input,
        offset,
        gradOutput,
        gradInput,
        gradOffset,
        weight,
        columns,
        kW,
        kH,
        dW,
        dH,
        padW,
        padH,
        dilationW,
        dilationH,
        group,
        deformable_group,
        im2col_step);
#else
    AT_ERROR("Detectron2 is not compiled with GPU support!");
#endif
  }
  AT_ERROR("This operator is not implemented on CPU");
}

inline int deform_conv_backward_filter(
    at::Tensor input,
    at::Tensor offset,
    at::Tensor gradOutput,
    at::Tensor gradWeight, // at::Tensor gradBias,
    at::Tensor columns,
    at::Tensor ones,
    int kW,
    int kH,
    int dW,
    int dH,
    int padW,
    int padH,
    int dilationW,
    int dilationH,
    int group,
    int deformable_group,
    float scale,
    int im2col_step) {
  if (gradOutput.is_cuda()) {
#if defined(WITH_CUDA) || defined(WITH_HIP)
    TORCH_CHECK(input.is_cuda(), "input tensor is not on GPU!");
    TORCH_CHECK(offset.is_cuda(), "offset tensor is not on GPU!");
    return deform_conv_backward_parameters_cuda(
        input,
        offset,
        gradOutput,
        gradWeight,
        columns,
        ones,
        kW,
        kH,
        dW,
        dH,
        padW,
        padH,
        dilationW,
        dilationH,
        group,
        deformable_group,
        scale,
        im2col_step);
#else
    AT_ERROR("Detectron2 is not compiled with GPU support!");
#endif
  }
  AT_ERROR("This operator is not implemented on CPU");
}

inline void modulated_deform_conv_forward(
    at::Tensor input,
    at::Tensor weight,
    at::Tensor bias,
    at::Tensor ones,
    at::Tensor offset,
    at::Tensor mask,
    at::Tensor output,
    at::Tensor columns,
    int kernel_h,
    int kernel_w,
    const int stride_h,
    const int stride_w,
    const int pad_h,
    const int pad_w,
    const int dilation_h,
    const int dilation_w,
    const int group,
    const int deformable_group,
    const bool with_bias) {
  if (input.is_cuda()) {
#if defined(WITH_CUDA) || defined(WITH_HIP)
    TORCH_CHECK(weight.is_cuda(), "weight tensor is not on GPU!");
    TORCH_CHECK(bias.is_cuda(), "bias tensor is not on GPU!");
    TORCH_CHECK(offset.is_cuda(), "offset tensor is not on GPU!");
    return modulated_deform_conv_cuda_forward(
        input,
        weight,
        bias,
        ones,
        offset,
        mask,
        output,
        columns,
        kernel_h,
        kernel_w,
        stride_h,
        stride_w,
        pad_h,
        pad_w,
        dilation_h,
        dilation_w,
        group,
        deformable_group,
        with_bias);
#else
    AT_ERROR("Detectron2 is not compiled with GPU support!");
#endif
  }
  AT_ERROR("This operator is not implemented on CPU");
}

inline void modulated_deform_conv_backward(
    at::Tensor input,
    at::Tensor weight,
    at::Tensor bias,
    at::Tensor ones,
    at::Tensor offset,
    at::Tensor mask,
    at::Tensor columns,
    at::Tensor grad_input,
    at::Tensor grad_weight,
    at::Tensor grad_bias,
    at::Tensor grad_offset,
    at::Tensor grad_mask,
    at::Tensor grad_output,
    int kernel_h,
    int kernel_w,
    int stride_h,
    int stride_w,
    int pad_h,
    int pad_w,
    int dilation_h,
    int dilation_w,
    int group,
    int deformable_group,
    const bool with_bias) {
  if (grad_output.is_cuda()) {
#if defined(WITH_CUDA) || defined(WITH_HIP)
    TORCH_CHECK(input.is_cuda(), "input tensor is not on GPU!");
    TORCH_CHECK(weight.is_cuda(), "weight tensor is not on GPU!");
    TORCH_CHECK(bias.is_cuda(), "bias tensor is not on GPU!");
    TORCH_CHECK(offset.is_cuda(), "offset tensor is not on GPU!");
    return modulated_deform_conv_cuda_backward(
        input,
        weight,
        bias,
        ones,
        offset,
        mask,
        columns,
        grad_input,
        grad_weight,
        grad_bias,
        grad_offset,
        grad_mask,
        grad_output,
        kernel_h,
        kernel_w,
        stride_h,
        stride_w,
        pad_h,
        pad_w,
        dilation_h,
        dilation_w,
        group,
        deformable_group,
        with_bias);
#else
    AT_ERROR("Detectron2 is not compiled with GPU support!");
#endif
  }
  AT_ERROR("This operator is not implemented on CPU");
}

} // namespace detectron2