ROCm: sgl-kernel enablement starting with sgl_moe_align_block (#3287)

sgl-kernel/setup_rocm.py

@@ -0,0 +1,92 @@
+# Copyright 2025 SGLang Team. All Rights Reserved.
+#
+# 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.
+# ==============================================================================
+
+import multiprocessing
+import os
+import sys
+from pathlib import Path
+
+import torch
+from setuptools import find_packages, setup
+from torch.utils.cpp_extension import BuildExtension, CUDAExtension
+
+root = Path(__file__).parent.resolve()
+
+if "bdist_wheel" in sys.argv and "--plat-name" not in sys.argv:
+    sys.argv.extend(["--plat-name", "manylinux2014_x86_64"])
+
+
+def _get_version():
+    with open(root / "pyproject.toml") as f:
+        for line in f:
+            if line.startswith("version"):
+                return line.split("=")[1].strip().strip('"')
+
+
+operator_namespace = "sgl_kernels"
+include_dirs = [
+    root / "src" / "sgl-kernel" / "include",
+    root / "src" / "sgl-kernel" / "csrc",
+]
+
+sources = [
+    "src/sgl-kernel/torch_extension_rocm.cc",
+    "src/sgl-kernel/csrc/moe_align_kernel.cu",
+]
+
+cxx_flags = ["-O3"]
+libraries = ["hiprtc", "amdhip64", "c10", "torch", "torch_python"]
+extra_link_args = ["-Wl,-rpath,$ORIGIN/../../torch/lib", "-L/usr/lib/x86_64-linux-gnu"]
+
+hipcc_flags = [
+    "-DNDEBUG",
+    f"-DOPERATOR_NAMESPACE={operator_namespace}",
+    "-O3",
+    "-Xcompiler",
+    "-fPIC",
+    "-std=c++17",
+    "-D__HIP_PLATFORM_AMD__=1",
+    "--amdgpu-target=gfx942",
+    "-DENABLE_BF16",
+    "-DENABLE_FP8",
+]
+
+setup(
+    name="sgl-kernel",
+    version=_get_version(),
+    packages=find_packages(),
+    package_dir={"": "src"},
+    ext_modules=[
+        CUDAExtension(
+            name="sgl_kernel.ops._kernels",
+            sources=sources,
+            include_dirs=include_dirs,
+            extra_compile_args={
+                "nvcc": hipcc_flags,
+                "cxx": cxx_flags,
+            },
+            libraries=libraries,
+            extra_link_args=extra_link_args,
+            py_limited_api=True,
+        ),
+    ],
+    cmdclass={
+        "build_ext": BuildExtension.with_options(
+            use_ninja=True, max_jobs=multiprocessing.cpu_count()
+        )
+    },
+    options={"bdist_wheel": {"py_limited_api": "cp39"}},
+    install_requires=["torch"],
+)

sgl-kernel/src/sgl-kernel/torch_extension_rocm.cc

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+/* Copyright 2025 SGLang Team. All Rights Reserved.
+
+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 <ATen/core/dispatch/Dispatcher.h>
+#include <torch/library.h>
+
+#include "sgl_kernels_ops.h"
+
+TORCH_LIBRARY_EXPAND(sgl_kernels, m) {
+  // moe_align_block_size
+  m.def(
+      "moe_align_block_size(Tensor topk_ids, int num_experts, int block_size, Tensor! sorted_token_ids, Tensor! "
+      "experts_ids, Tensor! num_tokens_post_pad, Tensor! token_cnts_buffer, Tensor! cumsum_buffer) -> ()");
+  m.impl("moe_align_block_size", torch::kCUDA, &moe_align_block_size);
+}
+
+REGISTER_EXTENSION(_kernels)