[Fix] Fix pybind exporting bug in fused_bias_leakyrelu and upfirdn2d (#1005)

* fix export bug in pybind

* fix type bug in fused_bias_leakyrelu backward

mmcv/ops/csrc/parrots/roi_pool_parrots.cpp

@@ -5,6 +5,7 @@
 #include "roi_pool_pytorch.h"
 using namespace parrots;
 
+#ifdef MMCV_WITH_CUDA
 void roi_pool_forward_cuda_parrots(CudaContext& ctx, const SSElement& attr,
                                    const OperatorBase::in_list_t& ins,
                                    OperatorBase::out_list_t& outs) {
@@ -62,3 +63,4 @@ PARROTS_EXTENSION_REGISTER(roi_pool_backward)
     .output(1)
     .apply(roi_pool_backward_cuda_parrots)
     .done();
+#endif

mmcv/ops/csrc/pytorch/pybind.cpp

@@ -214,9 +214,14 @@ void roi_align_rotated_backward(Tensor grad_output, Tensor rois,
                                 int sample_num, bool aligned, bool clockwise);
 
 PYBIND11_MODULE(TORCH_EXTENSION_NAME, m) {
-  m.def("upfirdn2d", &upfirdn2d, "upfirdn2d (CUDA)");
+  m.def("upfirdn2d", &upfirdn2d, "upfirdn2d (CUDA)", py::arg("input"),
+        py::arg("kernel"), py::arg("up_x"), py::arg("up_y"), py::arg("down_x"),
+        py::arg("down_y"), py::arg("pad_x0"), py::arg("pad_x1"),
+        py::arg("pad_y0"), py::arg("pad_y1"));
   m.def("fused_bias_leakyrelu", &fused_bias_leakyrelu,
-        "fused_bias_leakyrelu (CUDA)");
+        "fused_bias_leakyrelu (CUDA)", py::arg("input"), py::arg("bias"),
+        py::arg("empty"), py::arg("act"), py::arg("grad"), py::arg("alpha"),
+        py::arg("scale"));
   m.def("get_compiler_version", &get_compiler_version, "get_compiler_version");
   m.def("get_compiling_cuda_version", &get_compiling_cuda_version,
         "get_compiling_cuda_version");

mmcv/ops/fused_bias_leakyrelu.py

@@ -52,7 +52,7 @@ class FusedBiasLeakyReLUFunctionBackward(Function):
         # which is similar with the first order deviation in implementation.
         gradgrad_out = ext_module.fused_bias_leakyrelu(
             gradgrad_input,
-            gradgrad_bias,
+            gradgrad_bias.to(out.dtype),
             out,
             act=3,
             grad=1,