[Kernel] Migrate top-level srt/layers stray kernels to sglang.kernels (RFC #29630, Phase 2.5, 3/7) (#30787)

Co-authored-by: Claude Fable 5 <noreply@anthropic.com>

benchmark/kernels/bench_fused_gate_sigmoid_mul_add.py

@@ -7,7 +7,7 @@ over the Qwen3.5 MoE target hidden size.
 import torch
 import triton
 
-from sglang.srt.layers.elementwise import fused_gate_sigmoid_mul_add
+from sglang.kernels.ops.layernorm.elementwise import fused_gate_sigmoid_mul_add
 
 HIDDEN_DIMS = [4096]
 

benchmark/kernels/bench_fused_sigmoid_mul.py

@@ -10,7 +10,7 @@ a fair comparison — the reshape/contiguous cost is included.
 import torch
 import triton
 
-from sglang.srt.layers.elementwise import fused_sigmoid_mul
+from sglang.kernels.ops.layernorm.elementwise import fused_sigmoid_mul
 
 NUM_HEADS = 32
 HEAD_DIM = 256

python/sglang/jit_kernel/dsv4/elementwise.py

@@ -123,7 +123,9 @@ def fused_rope_inplace(
         inverse: if True, apply inverse rotation (conjugate freqs)
     """
     if _is_hip or _is_xpu:
-        from sglang.srt.layers.deepseek_v4_rope import apply_rotary_emb_triton
+        from sglang.kernels.ops.attention.deepseek_v4_rope import (
+            apply_rotary_emb_triton,
+        )
 
         apply_rotary_emb_triton(q, freqs_cis, positions=positions, inverse=inverse)
         if k is not None:

python/sglang/kernels/ops/attention/__init__.py

@@ -41,3 +41,24 @@ for _mod, _fn in _TRITON_KERNELS:
 del _mod, _fn
 
 __all__ = []
+
+
+# RoPE / QK-norm fusion kernels migrated from srt/layers top-level strays
+# (RFC #29630, Phase 2.5); registered for inventory.
+for _mod, _fn in [
+    ("deepseek_v4_rope", "precompute_freqs_cis"),
+    ("fused_qk_norm_rope_store", "fused_qk_norm_rope_swa_store"),
+    ("fused_qk_rmsnorm_rope_gate", "fused_qk_gemma_rmsnorm_rope_gate"),
+    ("fused_qk_norm", "fused_qk_norm"),
+    ("rotary_triton", "triton_mrope_fused"),
+    ("rotary_triton", "triton_ernie45_rope_fused_inplace"),
+    ("mrope", "apply_interleaved_rope_triton"),
+]:
+    register_kernel(
+        KernelSpec(
+            op=f"attention.{_fn}",
+            backend=KernelBackend.TRITON,
+            target=f"sglang.kernels.ops.attention.{_mod}:{_fn}",
+        )
+    )
+del _mod, _fn

python/sglang/kernels/ops/attention/mrope.py

@@ -0,0 +1,89 @@
+"""Interleaved M-RoPE Triton kernel, migrated from
+``sglang.srt.layers.rotary_embedding.mrope`` (RFC #29630, Phase 2.5).
+"""
+
+import torch
+import triton
+import triton.language as tl
+
+
+@triton.jit
+def apply_interleaved_rope_kernel(
+    x_ptr,
+    out_ptr,
+    S: tl.constexpr,
+    D: tl.constexpr,
+    stride_x_m,
+    stride_x_s,
+    stride_out_s,
+    section_1_end,
+    section_2_end,
+    BLOCK_S: tl.constexpr,
+    BLOCK_SIZE: tl.constexpr,
+):
+    start_s = tl.program_id(0) * BLOCK_S
+    s_offsets = start_s + tl.arange(0, BLOCK_S)
+
+    dim_offset = tl.program_id(1) * BLOCK_SIZE
+    dim_indices = dim_offset + tl.arange(0, BLOCK_SIZE)
+
+    mask_s = s_offsets < S
+    mask_d = dim_indices < D
+    mask = mask_s[:, None] & mask_d[None, :]
+
+    val_ptr = (
+        x_ptr + 0 * stride_x_m + s_offsets[:, None] * stride_x_s + dim_indices[None, :]
+    )
+    val = tl.load(val_ptr, mask=mask, other=0.0)
+
+    cond_a = (dim_indices[None, :] % 3 == 1) & (
+        dim_indices[None, :] < section_1_end * 3
+    )
+    val_a_ptr = (
+        x_ptr + 1 * stride_x_m + s_offsets[:, None] * stride_x_s + dim_indices[None, :]
+    )
+    val_a = tl.load(val_a_ptr, mask=mask & cond_a, other=0.0)
+
+    cond_b = (dim_indices[None, :] % 3 == 2) & (
+        dim_indices[None, :] < section_2_end * 3
+    )
+    val_b_ptr = (
+        x_ptr + 2 * stride_x_m + s_offsets[:, None] * stride_x_s + dim_indices[None, :]
+    )
+    val_b = tl.load(val_b_ptr, mask=mask & cond_b, other=0.0)
+
+    val = tl.where(cond_a, val_a, val)
+    val = tl.where(cond_b, val_b, val)
+
+    out_ptr = out_ptr + s_offsets[:, None] * stride_out_s + dim_indices[None, :]
+    tl.store(out_ptr, val, mask=mask)
+
+
+def apply_interleaved_rope_triton(x: torch.Tensor, mrope_section: list) -> torch.Tensor:
+    x = x.contiguous()
+    M, S, D = x.shape
+
+    out = torch.empty((S, D), dtype=x.dtype, device=x.device)
+
+    BLOCK_S = 64
+    BLOCK_SIZE = 128
+
+    grid = (triton.cdiv(S, BLOCK_S), triton.cdiv(D, BLOCK_SIZE))
+
+    section_1_end = mrope_section[1]
+    section_2_end = mrope_section[2]
+
+    apply_interleaved_rope_kernel[grid](
+        x,
+        out,
+        S,
+        D,
+        x.stride(0),
+        x.stride(1),
+        out.stride(0),
+        section_1_end,
+        section_2_end,
+        BLOCK_S=BLOCK_S,
+        BLOCK_SIZE=BLOCK_SIZE,
+    )
+    return out

python/sglang/kernels/ops/layernorm/__init__.py

@@ -336,3 +336,26 @@ __all__ = [
     "gemma_rmsnorm",
     "gemma_fused_add_rmsnorm",
 ]
+
+
+from sglang.kernels.registry import register_kernel
+from sglang.kernels.spec import KernelSpec
+
+# Triton / TileLang kernels migrated from srt/layers top-level strays
+# (RFC #29630, Phase 2.5); registered for inventory.
+_PHASE25_KERNELS = [
+    ("elementwise", "fused_dual_residual_rmsnorm", "triton"),
+    ("elementwise", "fused_rmsnorm", "triton"),
+    ("gemma4_fused_ops", "gemma4_fused_routing", "triton"),
+    ("gemma4_fused_ops", "gemma_qkv_rmsnorm", "triton"),
+    ("mhc_head", "fused_hc_head", "triton"),
+]
+for _mod, _fn, _bk in _PHASE25_KERNELS:
+    register_kernel(
+        KernelSpec(
+            op=f"layernorm.{_fn}",
+            backend=KernelBackend(_bk),
+            target=f"sglang.kernels.ops.layernorm.{_mod}:{_fn}",
+        )
+    )
+del _mod, _fn, _bk

python/sglang/kernels/ops/memory/__init__.py

@@ -28,3 +28,20 @@ for _mod, _fn in _TRITON_KERNELS:
 del _mod, _fn
 
 __all__ = []
+
+
+# Migrated from srt/layers (RFC #29630, Phase 2.5).
+register_kernel(
+    KernelSpec(
+        op="memory.gpu_tensor_hash",
+        backend=KernelBackend.TRITON,
+        target="sglang.kernels.ops.memory.gpu_tensor_hash:gpu_tensor_hash",
+    )
+)
+register_kernel(
+    KernelSpec(
+        op="memory.memcpy_triton",
+        backend=KernelBackend.TRITON,
+        target="sglang.kernels.ops.memory.memcpy_triton:memcpy_triton",
+    )
+)

python/sglang/kernels/ops/memory/memcpy_triton.py

@@ -0,0 +1,49 @@
+"""Offset/size-driven device memcpy kernel, migrated from
+``sglang.srt.layers.dp_attention`` (RFC #29630, Phase 2.5).
+"""
+
+import functools
+
+import triton
+import triton.language as tl
+
+
+@triton.jit
+def memcpy_triton_kernel(
+    dst_ptr,
+    src_ptr,
+    offset_ptr,
+    sz_ptr,
+    offset_src: tl.constexpr,
+    chunk_size,  # multiplied for offset and sz
+    BLOCK_SIZE: tl.constexpr,
+):
+    pid = tl.program_id(axis=0).to(tl.int64)
+    offset = tl.load(offset_ptr).to(tl.int64) * chunk_size
+    sz = tl.load(sz_ptr).to(tl.int64) * chunk_size
+
+    start_index = pid * BLOCK_SIZE
+    offs = tl.arange(0, BLOCK_SIZE)
+    mask = start_index + offs < sz
+
+    if offset_src:
+        data = tl.load(src_ptr + offset + start_index + offs, mask=mask)
+        tl.store(dst_ptr + start_index + offs, data, mask=mask)
+    else:
+        data = tl.load(src_ptr + start_index + offs, mask=mask)
+        tl.store(dst_ptr + offset + start_index + offs, data, mask=mask)
+
+
+def prod(x):
+    return functools.reduce(lambda a, b: a * b, x, 1)
+
+
+def memcpy_triton(dst, src, dim, offset, sz, offset_src):
+    max_size = min(src.numel(), dst.numel())
+    assert dim == 0, "dim != 0 unsupported"
+    assert src.shape[1:] == dst.shape[1:], "src and dst must have same shape"
+    chunk_size = prod(src.shape[1:])
+    BLOCK_SIZE = 8192
+    grid = (triton.cdiv(max_size, BLOCK_SIZE),)
+
+    memcpy_triton_kernel[grid](dst, src, offset, sz, offset_src, chunk_size, BLOCK_SIZE)

python/sglang/kernels/ops/sampling/__init__.py

@@ -54,3 +54,13 @@ def top_p_renorm_probs(
 
 
 __all__ = ["top_k_renorm_probs", "top_p_renorm_probs"]
+
+
+# Migrated from srt/layers/utils/hash.py (RFC #29630, Phase 2.5).
+register_kernel(
+    KernelSpec(
+        op="sampling.murmur_hash32",
+        backend=KernelBackend.TRITON,
+        target="sglang.kernels.ops.sampling.murmur_hash:murmur_hash32",
+    )
+)

python/sglang/srt/hardware_backend/npu/attention/ascend_dsv4_backend.py

@@ -312,7 +312,7 @@ class CompressorAscendBackendMixin(CompressorBackendMixin):
         ):
             return self._forward_compress_native(compressor, x, forward_batch)
 
-        from sglang.srt.layers.deepseek_v4_rope import (
+        from sglang.kernels.ops.attention.deepseek_v4_rope import (
             get_fused_compressor_rope_cos_sin,
         )
 
@@ -649,7 +649,7 @@ class CompressorAscendBackendMixin(CompressorBackendMixin):
             # Use the same contig cache as the outer rope path; .real/.imag on a
             # complex tensor are strided views and aclnnIndex over them triggers
             # StridedSlice (see _get_contig_freqs_real_imag in deepseek_v4_rope.py).
-            from sglang.srt.layers.deepseek_v4_rope import (
+            from sglang.kernels.ops.attention.deepseek_v4_rope import (
                 _get_contig_freqs_real_imag,
             )
 
@@ -890,7 +890,7 @@ class C4IndexerAscendBackendMixin(C4IndexerBackendMixin):
     def _compute_q_npu(
         self, c4_indexer, q_lora: torch.Tensor, positions: torch.Tensor
     ) -> torch.Tensor:
-        from sglang.srt.layers.deepseek_v4_rope import v4_rope_inplace_npu
+        from sglang.kernels.ops.attention.deepseek_v4_rope import v4_rope_inplace_npu
 
         bs = q_lora.shape[0]
         q, _ = c4_indexer.wq_b(q_lora)

python/sglang/srt/layers/attention/dsv4/compress_hip.py

@@ -9,6 +9,11 @@ import torch.nn as nn
 import triton
 import triton.language as tl
 
+from sglang.kernels.ops.attention.deepseek_v4_rope import (
+    apply_rotary_emb_triton,
+    fused_norm_rope_inplace_triton,
+    fused_softmax_pool_triton,
+)
 from sglang.srt.environ import envs
 from sglang.srt.layers.attention.dsa.dsa_indexer import rotate_activation
 from sglang.srt.layers.attention.dsv4.compressor import Compressor as _CompressorBase
@@ -16,14 +21,9 @@ from sglang.srt.layers.attention.dsv4.fused_compress_triton import (
     fused_ape_pool_norm_rope,
 )
 from sglang.srt.layers.attention.nsa.nsa_indexer import rotate_activation
-from sglang.srt.layers.deepseek_v4_rope import (
-    apply_rotary_emb_triton,
-    fused_norm_rope_inplace_triton,
-    fused_softmax_pool_triton,
-)
 
 try:
-    from sglang.srt.layers.deepseek_v4_rope import fused_softmax_pool_triton
+    from sglang.kernels.ops.attention.deepseek_v4_rope import fused_softmax_pool_triton
 except ImportError:
     fused_softmax_pool_triton = None
 from sglang.srt.mem_cache.deepseek_v4_compress_state import (

python/sglang/srt/layers/attention/dsv4/compressor_v2.py

@@ -562,12 +562,14 @@ class CompressorBackendMixin:
         layer_id: int,
     ) -> None:
         """HIP-specific forward path using PyTorch/Triton fallbacks."""
+        from sglang.kernels.ops.attention.deepseek_v4_rope import (
+            fused_norm_rope_inplace_triton,
+        )
         from sglang.srt.layers.attention.dsv4.quant_k_cache import (
             quant_to_nope_fp8_rope_bf16_pack_triton,
         )
         from sglang.srt.layers.attention.nsa.nsa_indexer import rotate_activation
         from sglang.srt.layers.attention.nsa.triton_kernel import act_quant
-        from sglang.srt.layers.deepseek_v4_rope import fused_norm_rope_inplace_triton
 
         compress_ratio = compressor.ratio
         head_dim = compressor.head_dim

python/sglang/srt/layers/dp_attention.py

@@ -1,14 +1,11 @@
 from __future__ import annotations
 
-import functools
 import logging
 from contextlib import contextmanager
 from enum import IntEnum, auto
 from typing import TYPE_CHECKING, List, Optional, Tuple
 
 import torch
-import triton
-import triton.language as tl
 
 from sglang.srt.distributed import (
     GroupCoordinator,
@@ -376,45 +373,7 @@ def get_dp_local_slice_cpu(
     return local_start_pos, local_num_tokens
 
 
-@triton.jit
+from sglang.kernels.ops.memory.memcpy_triton import memcpy_triton
-def memcpy_triton_kernel(
-    dst_ptr,
-    src_ptr,
-    offset_ptr,
-    sz_ptr,
-    offset_src: tl.constexpr,
-    chunk_size,  # multiplied for offset and sz
-    BLOCK_SIZE: tl.constexpr,
-):
-    pid = tl.program_id(axis=0).to(tl.int64)
-    offset = tl.load(offset_ptr).to(tl.int64) * chunk_size
-    sz = tl.load(sz_ptr).to(tl.int64) * chunk_size
-
-    start_index = pid * BLOCK_SIZE
-    offs = tl.arange(0, BLOCK_SIZE)
-    mask = start_index + offs < sz
-
-    if offset_src:
-        data = tl.load(src_ptr + offset + start_index + offs, mask=mask)
-        tl.store(dst_ptr + start_index + offs, data, mask=mask)
-    else:
-        data = tl.load(src_ptr + start_index + offs, mask=mask)
-        tl.store(dst_ptr + offset + start_index + offs, data, mask=mask)
-
-
-def prod(x):
-    return functools.reduce(lambda a, b: a * b, x, 1)
-
-
-def memcpy_triton(dst, src, dim, offset, sz, offset_src):
-    max_size = min(src.numel(), dst.numel())
-    assert dim == 0, "dim != 0 unsupported"
-    assert src.shape[1:] == dst.shape[1:], "src and dst must have same shape"
-    chunk_size = prod(src.shape[1:])
-    BLOCK_SIZE = 8192
-    grid = (triton.cdiv(max_size, BLOCK_SIZE),)
-
-    memcpy_triton_kernel[grid](dst, src, offset, sz, offset_src, chunk_size, BLOCK_SIZE)
 
 
 def _dp_gather_via_all_reduce(

python/sglang/srt/layers/rotary_embedding/mrope.py

@@ -7,11 +7,11 @@ from typing import List, Optional, Tuple
 
 import torch
 
-from sglang.srt.layers.rotary_embedding.base import RotaryEmbedding
+from sglang.kernels.ops.attention.rotary_triton import (
-from sglang.srt.layers.rotary_embedding.triton_kernels import (
     triton_ernie45_rope_fused_inplace,
     triton_mrope_fused,
 )
+from sglang.srt.layers.rotary_embedding.base import RotaryEmbedding
 from sglang.srt.layers.rotary_embedding.utils import apply_rotary_emb
 from sglang.srt.layers.rotary_embedding.yarn import (
     yarn_find_correction_range,
@@ -41,94 +41,10 @@ if _is_npu:
 if _is_xpu:
     from sgl_kernel import multimodal_rotary_embedding
 
-import triton
+from sglang.kernels.ops.attention.mrope import apply_interleaved_rope_triton
-import triton.language as tl
-
 from sglang.srt.runtime_context import get_server_args
 
 
-@triton.jit
-def apply_interleaved_rope_kernel(
-    x_ptr,
-    out_ptr,
-    S: tl.constexpr,
-    D: tl.constexpr,
-    stride_x_m,
-    stride_x_s,
-    stride_out_s,
-    section_1_end,
-    section_2_end,
-    BLOCK_S: tl.constexpr,
-    BLOCK_SIZE: tl.constexpr,
-):
-    start_s = tl.program_id(0) * BLOCK_S
-    s_offsets = start_s + tl.arange(0, BLOCK_S)
-
-    dim_offset = tl.program_id(1) * BLOCK_SIZE
-    dim_indices = dim_offset + tl.arange(0, BLOCK_SIZE)
-
-    mask_s = s_offsets < S
-    mask_d = dim_indices < D
-    mask = mask_s[:, None] & mask_d[None, :]
-
-    val_ptr = (
-        x_ptr + 0 * stride_x_m + s_offsets[:, None] * stride_x_s + dim_indices[None, :]
-    )
-    val = tl.load(val_ptr, mask=mask, other=0.0)
-
-    cond_a = (dim_indices[None, :] % 3 == 1) & (
-        dim_indices[None, :] < section_1_end * 3
-    )
-    val_a_ptr = (
-        x_ptr + 1 * stride_x_m + s_offsets[:, None] * stride_x_s + dim_indices[None, :]
-    )
-    val_a = tl.load(val_a_ptr, mask=mask & cond_a, other=0.0)
-
-    cond_b = (dim_indices[None, :] % 3 == 2) & (
-        dim_indices[None, :] < section_2_end * 3
-    )
-    val_b_ptr = (
-        x_ptr + 2 * stride_x_m + s_offsets[:, None] * stride_x_s + dim_indices[None, :]
-    )
-    val_b = tl.load(val_b_ptr, mask=mask & cond_b, other=0.0)
-
-    val = tl.where(cond_a, val_a, val)
-    val = tl.where(cond_b, val_b, val)
-
-    out_ptr = out_ptr + s_offsets[:, None] * stride_out_s + dim_indices[None, :]
-    tl.store(out_ptr, val, mask=mask)
-
-
-def apply_interleaved_rope_triton(x: torch.Tensor, mrope_section: list) -> torch.Tensor:
-    x = x.contiguous()
-    M, S, D = x.shape
-
-    out = torch.empty((S, D), dtype=x.dtype, device=x.device)
-
-    BLOCK_S = 64
-    BLOCK_SIZE = 128
-
-    grid = (triton.cdiv(S, BLOCK_S), triton.cdiv(D, BLOCK_SIZE))
-
-    section_1_end = mrope_section[1]
-    section_2_end = mrope_section[2]
-
-    apply_interleaved_rope_kernel[grid](
-        x,
-        out,
-        S,
-        D,
-        x.stride(0),
-        x.stride(1),
-        out.stride(0),
-        section_1_end,
-        section_2_end,
-        BLOCK_S=BLOCK_S,
-        BLOCK_SIZE=BLOCK_SIZE,
-    )
-    return out
-
-
 def apply_interleaved_rope(x: torch.Tensor, mrope_section: list) -> torch.Tensor:
     x_t = x[0].clone()
     x_t[..., 1 : mrope_section[1] * 3 : 3] = x[1, ..., 1 : mrope_section[1] * 3 : 3]

python/sglang/srt/layers/sampler.py

@@ -5,12 +5,12 @@ import torch
 import torch.distributed as dist
 from torch import nn
 
+from sglang.kernels.ops.sampling.murmur_hash import murmur_hash32
 from sglang.srt.distributed import get_tp_group
 from sglang.srt.layers.dp_attention import (
     is_dp_attention_enabled,
 )
 from sglang.srt.layers.logits_processor import LogitsProcessorOutput
-from sglang.srt.layers.utils.hash import murmur_hash32
 from sglang.srt.layers.utils.logprob import get_token_ids_logprobs, get_top_logprobs
 from sglang.srt.runtime_context import get_parallel, get_server_args
 from sglang.srt.sampling.sampling_batch_info import SamplingBatchInfo

python/sglang/srt/managers/mm_utils.py

@@ -16,8 +16,8 @@ import numpy as np
 import torch
 from torch import nn
 
+from sglang.kernels.ops.memory.gpu_tensor_hash import gpu_tensor_hash
 from sglang.srt.environ import envs
-from sglang.srt.layers.multimodal import gpu_tensor_hash
 from sglang.srt.managers.io_struct import (
     BaseBatchReq,
     TokenizedEmbeddingReqInput,

python/sglang/srt/models/deepseek_v4.py

@@ -25,6 +25,9 @@ from sglang.jit_kernel.dsv4 import (
     fused_rope_inplace,
     sglang_per_token_group_quant_fp8_dsv4_wo_a,
 )
+from sglang.kernels.ops.attention.deepseek_v4_rope import (
+    v4_rope_inplace_npu,
+)
 from sglang.srt.compilation.compilation_config import register_split_op
 from sglang.srt.configs.deepseek_v4 import DeepSeekV4Config
 from sglang.srt.distributed import (
@@ -47,9 +50,6 @@ from sglang.srt.layers.communicator_dsa_cp import (
     dsa_cp_gather_hidden_states,
     dsa_cp_reduce_scatter_hidden_states,
 )
-from sglang.srt.layers.deepseek_v4_rope import (
-    v4_rope_inplace_npu,
-)
 from sglang.srt.layers.dp_attention import (
     _tbo_event,
     attn_tp_all_gather,
@@ -132,7 +132,11 @@ if not _is_hip:
 if _is_xpu:
     from sgl_kernel import hc_split_sinkhorn
 else:
-    from sglang.srt.layers.mhc import hc_split_sinkhorn, mhc_fused_post_pre, npu_hc_pre
+    from sglang.kernels.ops.layernorm.mhc import (
+        hc_split_sinkhorn,
+        mhc_fused_post_pre,
+        npu_hc_pre,
+    )
 
 from sglang.srt.utils import (
     LazyValue,
@@ -476,7 +480,7 @@ class MqaAttentionBase(nn.Module):
             tp_size=self.attn_tp_size,
         )
 
-        from sglang.srt.layers.deepseek_v4_rope import precompute_freqs_cis
+        from sglang.kernels.ops.attention.deepseek_v4_rope import precompute_freqs_cis
 
         rope_theta, rope_scaling = get_rope_config(config)
         self.rope_scaling = rope_scaling
@@ -801,7 +805,7 @@ class MQALayer(MqaAttentionBase):
                 else self.wkv(x_linear)[0]
             )
 
-            from sglang.srt.layers.fused_qk_norm_rope_store import (
+            from sglang.kernels.ops.attention.fused_qk_norm_rope_store import (
                 fused_qk_norm_rope_swa_store,
             )
 
@@ -915,7 +919,7 @@ class MQALayer(MqaAttentionBase):
                     False,
                 )
 
-            from sglang.srt.layers.fused_qk_norm_rope_store import (
+            from sglang.kernels.ops.attention.fused_qk_norm_rope_store import (
                 fused_qk_norm_rope_swa_store,
             )
 
@@ -1366,7 +1370,7 @@ class DeepseekV4DecoderLayer(nn.Module):
             return y, post, comb, False
 
         if envs.SGLANG_OPT_USE_TILELANG_MHC_PRE.get():
-            from sglang.srt.layers.mhc import mhc_pre
+            from sglang.kernels.ops.layernorm.mhc import mhc_pre
 
             norm_kwargs = {}
             if norm is not None:
@@ -1450,7 +1454,7 @@ class DeepseekV4DecoderLayer(nn.Module):
             return torch.ops.custom.npu_hc_post(x, residual, post, comb)
 
         if envs.SGLANG_OPT_USE_TILELANG_MHC_POST.get():
-            from sglang.srt.layers.mhc import mhc_post
+            from sglang.kernels.ops.layernorm.mhc import mhc_post
 
             return mhc_post(x, residual, post, comb)
 
@@ -2048,7 +2052,7 @@ class DeepseekV4Model(nn.Module):
         hc_base: torch.Tensor,
     ):
         if x.numel() > 0:
-            from sglang.srt.layers.mhc_head import fused_hc_head
+            from sglang.kernels.ops.layernorm.mhc_head import fused_hc_head
 
             return fused_hc_head(
                 x.contiguous(),
@@ -2315,7 +2319,7 @@ class DeepseekV4ForCausalLM(nn.Module):
         # batched/contiguous-load rope kernels (faster on gfx95; .
         # Module-level toggles default OFF; flipped True here for DSV4
         if _is_hip:
-            from sglang.srt.layers.deepseek_v4_rope import set_batched_rope
+            from sglang.kernels.ops.attention.deepseek_v4_rope import set_batched_rope
             from sglang.srt.layers.quantization.fp8_utils import set_force_ck_w8a8
 
             set_force_ck_w8a8(True)
@@ -2600,7 +2604,7 @@ class DeepseekV4ForCausalLM(nn.Module):
         if layer is None:
             return
 
-        from sglang.srt.layers.mhc import prewarm_mhc_pre
+        from sglang.kernels.ops.layernorm.mhc import prewarm_mhc_pre
 
         tic = time.perf_counter()
         prewarm_mhc_pre(

python/sglang/srt/models/gemma4_causal.py

@@ -24,16 +24,16 @@ from transformers import (
     PreTrainedModel,
 )
 
-from sglang.srt.distributed import (
+from sglang.kernels.ops.layernorm.gemma4_fused_ops import (
-    get_pp_group,
-)
-from sglang.srt.layers.gemma4_fused_ops import (
     gemma4_fused_routing,
     gemma_dual_rmsnorm_residual_scalar,
     gemma_qkv_rmsnorm,
     gemma_rmsnorm_residual_scalar,
     gemma_routing_post_topk,
 )
+from sglang.srt.distributed import (
+    get_pp_group,
+)
 from sglang.srt.layers.layernorm import Gemma4RMSNorm, RMSNorm
 from sglang.srt.layers.linear import (
     QKVParallelLinear,

python/sglang/srt/models/grok.py

@@ -22,16 +22,16 @@ import torch.nn.functional as F
 from torch import nn
 from transformers import PretrainedConfig
 
+from sglang.kernels.ops.layernorm.elementwise import (
+    fused_dual_residual_rmsnorm,
+    fused_rmsnorm,
+    gelu_and_mul_triton,
+)
 from sglang.kernels.ops.moe.router import fused_moe_router_shim
 from sglang.srt.distributed import (
     tensor_model_parallel_all_reduce,
 )
 from sglang.srt.layers.activation import GeluAndMul
-from sglang.srt.layers.elementwise import (
-    fused_dual_residual_rmsnorm,
-    fused_rmsnorm,
-    gelu_and_mul_triton,
-)
 from sglang.srt.layers.layernorm import RMSNorm
 from sglang.srt.layers.linear import (
     MergedColumnParallelLinear,

python/sglang/srt/models/qwen2_moe.py

@@ -27,6 +27,7 @@ import torch.nn.functional as F
 from torch import nn
 from transformers import PretrainedConfig
 
+from sglang.kernels.ops.layernorm.elementwise import fused_gate_sigmoid_mul_add
 from sglang.srt.batch_overlap.two_batch_overlap import model_forward_maybe_tbo
 from sglang.srt.distributed import (
     get_pp_group,
@@ -48,7 +49,6 @@ from sglang.srt.layers.cp.utils import is_cp_v2_active
 from sglang.srt.layers.dp_attention import (
     is_dp_attention_enabled,
 )
-from sglang.srt.layers.elementwise import fused_gate_sigmoid_mul_add
 from sglang.srt.layers.layernorm import RMSNorm
 from sglang.srt.layers.linear import (
     MergedColumnParallelLinear,

python/sglang/srt/models/qwen3_5.py

@@ -25,6 +25,7 @@ import triton
 from sglang.jit_kernel.triton.gdn_fused_proj import (
     fused_qkvzba_split_reshape_cat_contiguous,
 )
+from sglang.kernels.ops.layernorm.elementwise import fused_sigmoid_mul
 
 # Configs
 from sglang.srt.configs.qwen3_5 import (
@@ -45,7 +46,6 @@ from sglang.srt.layers.communicator import LayerCommunicator, LayerScatterModes
 from sglang.srt.layers.dp_attention import (
     is_dp_attention_enabled,
 )
-from sglang.srt.layers.elementwise import fused_sigmoid_mul
 
 # Layers - Others
 from sglang.srt.layers.layernorm import GemmaRMSNorm
@@ -142,7 +142,7 @@ def _disable_shared_experts_fusion() -> bool:
 
 
 if _is_cuda:
-    from sglang.srt.layers.fused_qk_rmsnorm_rope_gate import (
+    from sglang.kernels.ops.attention.fused_qk_rmsnorm_rope_gate import (
         fused_qk_gemma_rmsnorm_rope_gate,
     )
 

test/manual/layers/test_fused_gate_sigmoid_mul_add.py

@@ -3,7 +3,7 @@ import itertools
 import pytest
 import torch
 
-from sglang.srt.layers.elementwise import fused_gate_sigmoid_mul_add
+from sglang.kernels.ops.layernorm.elementwise import fused_gate_sigmoid_mul_add
 
 DTYPES = [torch.float16, torch.bfloat16]
 TOKEN_COUNTS = [1, 2, 4, 8, 16, 64, 512, 1024, 2048, 4096, 8192]

test/manual/layers/test_fused_sigmoid_mul.py

@@ -3,7 +3,7 @@ import itertools
 import pytest
 import torch
 
-from sglang.srt.layers.elementwise import fused_sigmoid_mul
+from sglang.kernels.ops.layernorm.elementwise import fused_sigmoid_mul
 
 DTYPES = [torch.float16, torch.bfloat16]
 TOKEN_COUNTS = [1, 2, 4, 8, 16, 64, 512, 1024, 2048, 4096, 8192]

test/registered/jit/deepseek_v4/test_fp4_indexer.py

@@ -11,14 +11,14 @@ from sglang.jit_kernel.dsv4 import (
     fused_q_indexer_rope_hadamard_fp4_quant,
 )
 from sglang.jit_kernel.hadamard import hadamard_transform
+from sglang.kernels.ops.attention.deepseek_v4_rope import (
+    apply_rotary_emb_triton,
+    precompute_freqs_cis,
+)
 from sglang.srt.layers.attention.dsv4.fp4_indexer import (
     quantize_fp4_indexer_tensor,
     store_fp4_index_k_cache,
 )
-from sglang.srt.layers.deepseek_v4_rope import (
-    apply_rotary_emb_triton,
-    precompute_freqs_cis,
-)
 from sglang.test.ci.ci_register import register_cuda_ci
 
 register_cuda_ci(est_time=60, stage="base-b-kernel-unit", runner_config="1-gpu-large")

test/registered/kernels/test_gemma4_fused_routing.py

@@ -26,7 +26,7 @@ pytestmark = pytest.mark.skipif(
 
 @pytest.fixture(scope="module")
 def fused_routing():
-    from sglang.srt.layers.gemma4_fused_ops import gemma4_fused_routing
+    from sglang.kernels.ops.layernorm.gemma4_fused_ops import gemma4_fused_routing
 
     return gemma4_fused_routing
 

test/registered/kernels/test_mhc_kernels.py

@@ -1,8 +1,8 @@
 import pytest
 import torch
 
-import sglang.srt.layers.mhc as mhc
+import sglang.kernels.ops.layernorm.mhc as mhc
-from sglang.srt.layers.mhc import mhc_fused_post_pre, mhc_post, mhc_pre
+from sglang.kernels.ops.layernorm.mhc import mhc_fused_post_pre, mhc_post, mhc_pre
 from sglang.test.ci.ci_register import register_cuda_ci
 
 register_cuda_ci(est_time=30, stage="base-b", runner_config="1-gpu-large")