适配deepseekv3.2

python/sglang/srt/layers/attention/native_mla.py

+import math
+from typing import Optional, Tuple, List
+
+import torch
+
+def cdiv(x: int, y: int):
+    return (x+y-1) // y
+
+def native_mla_sparse_fwd(
+    q: torch.Tensor,
+    kv: torch.Tensor,
+    indices: torch.Tensor,
+    sm_scale: float,
+    d_v: int = 512,) -> Tuple[torch.Tensor, torch.Tensor, torch.Tensor]:
+
+    s_q, _, d_qk = q.size() 
+    s_kv = kv.size(0)
+    topk = indices.size(-1)
+
+    def log2sumexp2(a: torch.Tensor, dim: int) -> torch.Tensor:
+        return torch.logsumexp(a * math.log(2), dim=dim) * math.log2(math.e)
+    
+    indices = indices[:, 0, :] # [s_q, topk]
+    invalid_indices_mask = (indices < 0) | (indices >= s_kv)
+    qs = q.float()  # [s_q, h_q, d_qk]
+    kvs = kv[ :, 0, :].float()  # [s_kv, d_qk]
+
+    kvs = torch.index_select(kvs, 0, indices.masked_fill(invalid_indices_mask, 0).flatten()).view(s_q, topk, d_qk)  # [s_q, topk, d_qk]
+    attn_score = qs @ kvs.transpose(1, 2)    # [s_q, h_q, topk]
+    attn_score.masked_fill_(invalid_indices_mask.unsqueeze(1), float('-inf'))
+    attn_score *= sm_scale * math.log2(math.e)
+    max_logits = torch.max(attn_score, dim=-1)[0]   # [s_q, h_q]
+    lse = log2sumexp2(attn_score, dim=-1)   # [s_q, h_q]
+    attn_score = torch.exp2(attn_score - lse.unsqueeze(-1))   # [s_q, h_q, topk]
+    result = attn_score @ kvs[:, :, :d_v]
+    return (max_logits, lse, result)
+
+
+
+def native_mla_with_kvcache(
+    q: torch.Tensor,    # [batch_size, s_q, h_q, d]
+    blocked_k: torch.Tensor,    # [?, block_size, h_kv, d]
+    block_table: torch.Tensor,      # [batch_size, ?]
+    cache_seqlens: torch.Tensor,    # [batch_size]
+    dv: int,
+    is_causal: bool,
+    indices: Optional[torch.Tensor] = None   # [batch_size, s_q, topk]
+) -> Tuple[torch.Tensor, torch.Tensor]:
+    """
+    A reference implementation in PyTorch
+    """
+    def get_topk_attn_mask(s_q: int, s_k: int, indices: torch.Tensor):
+        mask = torch.zeros(s_q, s_k, dtype=torch.bool)
+        for i in range(s_q):
+            cur_indices = indices[i]
+            valid_indices = cur_indices[cur_indices != -1]
+            mask[i, valid_indices] = True
+        return mask
+    
+    def scaled_dot_product_attention(
+        batch_idx: int,
+        query: torch.Tensor,    # [h_q, s_q, d]
+        kv: torch.Tensor,      # [h_kv, s_k, d]
+        dv: int,
+        is_causal,
+        indices: Optional[torch.Tensor],  # [s_q, topk]
+    ) -> Tuple[torch.Tensor, torch.Tensor]:
+        h_q = query.size(0)
+        h_kv = kv.size(0)
+        s_q = query.shape[-2]
+        s_k = kv.shape[-2]
+        query = query.float()
+        kv = kv.float()
+        if h_kv != 1:
+            kv = kv.repeat_interleave(h_q // h_kv, dim=0)
+        kv[kv != kv] = 0.0
+        attn_weight = query @ kv.transpose(-2, -1) # [h_q, s_q, s_k]
+        if (is_causal and query.size(1) > 1) or indices is not None:
+            mask = torch.ones(s_q, s_k, dtype=torch.bool)
+            if is_causal:
+                assert indices is None
+                mask = mask.tril(diagonal=s_k - s_q)
+            if indices is not None:
+                mask &= get_topk_attn_mask(s_q, s_k, indices)
+            attn_bias = torch.zeros(s_q, s_k, dtype=torch.float)
+            attn_bias.masked_fill_(mask.logical_not(), float("-inf"))
+            attn_weight += attn_bias.to(q.dtype)
+        attn_weight /= math.sqrt(query.size(-1))
+        lse = attn_weight.logsumexp(dim=-1) # [h_q, s_q]
+        attn_weight = torch.softmax(attn_weight, dim=-1, dtype=torch.float32)
+        output = attn_weight @ kv[..., :dv]    # [h_q, s_q, dv]
+        # Correct for q tokens which has no attendable k
+        lonely_q_mask = (lse == float("-inf"))
+        output[lonely_q_mask.unsqueeze(-1).broadcast_to(h_q, s_q, dv)] = 0.0
+        lse[lonely_q_mask] = float("+inf")
+        
+        return output, lse
+
+    b, s_q, h_q, d = q.size()
+    block_size = blocked_k.size(1)
+    h_kv = blocked_k.size(2)
+    cache_seqlens_cpu = cache_seqlens.cpu()
+    out_ref = torch.empty(b, s_q, h_q, dv, dtype=torch.float32)
+    lse_ref = torch.empty(b, h_q, s_q, dtype=torch.float32)
+    for i in range(b):
+        cur_len = cache_seqlens_cpu[i].item()
+        cur_num_blocks = cdiv(cur_len, block_size)
+        cur_block_indices = block_table[i][0: cur_num_blocks]
+        cur_kv = blocked_k[cur_block_indices].view(-1, h_kv, d)[:cur_len, ...]
+        cur_out, cur_lse = scaled_dot_product_attention(
+            i,
+            q[i].transpose(0, 1),
+            cur_kv.transpose(0, 1),
+            dv,
+            is_causal,
+            indices[i] if indices is not None else None
+        )
+        out_ref[i] = cur_out.transpose(0, 1)
+        lse_ref[i] = cur_lse
+    out_ref = out_ref.to(torch.bfloat16)
+    return out_ref, lse_ref

python/sglang/srt/layers/attention/nsa/fallback_fp8.py

+# fallback_fp8.py
+# PyTorch fallback implementation for DeepGEMM-like fp8 logits ops
+from sglang.srt.utils import ceil_div
+import torch
+
+@torch.no_grad()
+def fallback_fp8_mqa_logits(q: torch.Tensor,
+                             kv: torch.Tensor,
+                             weights: torch.Tensor,
+                             ks: torch.Tensor,
+                             ke: torch.Tensor, cost_only: bool = False) -> torch.Tensor:
+    seq_len_kv = kv.shape[0]
+
+    if cost_only:
+        start = ks.clamp(min=0, max=seq_len_kv)
+        end   = ke.clamp(min=0, max=seq_len_kv)
+        count_ones_per_row = (end - start).clamp(min=0)
+        return count_ones_per_row.sum()
+
+    k = kv
+    q = q.float()
+    k = k.float()
+
+    mask_lo = torch.arange(0, seq_len_kv, device='cuda')[None, :] >= ks[:, None]
+    mask_hi = torch.arange(0, seq_len_kv, device='cuda')[None, :] < ke[:, None]
+    mask = mask_lo & mask_hi
+
+    score = torch.einsum('mhd,nd->hmn', q, k)
+    logits = (score.relu() * weights.unsqueeze(-1).transpose(0, 1)).sum(dim=0)
+    logits = logits.masked_fill(~mask, float('-inf'))
+
+    #cost = mask.sum()
+    return logits
+    
+    # """
+    # PyTorch fallback for fp8_mqa_logits. 
+    # No real fp8 used, just FP32.
+    # Args:
+    #     q: (M, H, D) query
+    #     k: (N, D) key
+    #     weights: (M, H)
+    #     ks: (M,) int32
+    #     ke: (M,) int32
+    # Returns:
+    #     logits: (M, N) with -inf outside of valid range
+    # """
+    # M, H, D = q.shape
+    # N = k[0].shape[0]
+    # logits = torch.full((M, N), float("-inf"), dtype=torch.float32, device=q.device)
+
+    # # for i in range(M):
+    # #     start = max(ks[i].item(), 0)
+    # #     end = min(ke[i].item(), N)
+    # #     if start >= end:
+    # #         continue
+    # #     qi = q[i]  # (H, D)
+    # #     ki = k[start:end]  # (L, D)
+    # #     sim = torch.matmul(qi, ki.T)  # (H, L)
+    # #     weighted_sim = (sim.relu() * weights[i].unsqueeze(-1)).sum(dim=0)  # (L,)
+    # #     logits[i, start:end] = weighted_sim
+    # return logits
+
+
+@torch.no_grad()
+def fallback_fp8_paged_mqa_logits(q: torch.Tensor,
+                                   kv_cache: torch.Tensor,
+                                   weights: torch.Tensor,
+                                   context_lens: torch.Tensor,
+                                   block_tables: torch.Tensor,
+                                   max_model_len: int) -> torch.Tensor:
+    
+    batch_size, next_n, heads, dim = q.size()
+    num_block, block_size, _, dim = kv_cache.size()
+    logits = torch.full([batch_size * next_n, max_model_len], float('-inf'), device=q.device, dtype=torch.float32)
+    context_lens = context_lens.tolist()
+    for i in range(batch_size):
+        context_len = context_lens[i]
+        q_offsets = torch.arange(context_len - next_n, context_len, device=q.device)
+        weight_slice = weights[i * next_n:(i + 1) * next_n, :].transpose(0, 1).contiguous()
+        for block_rk in range(ceil_div(context_len, block_size)):
+            block_idx = block_tables[i][block_rk]
+            qx, kx = q[i], kv_cache[block_idx]
+            k_offsets = torch.arange(block_rk * block_size, (block_rk + 1) * block_size, device=q.device)
+            mask = (k_offsets[None, :] < context_len) & (k_offsets[None, :] <= q_offsets[:, None])
+            s = torch.where(mask[None, :, :], (qx.transpose(0, 1) @ kx.transpose(0, 1).transpose(1, 2)).to(logits.dtype), float('-inf'))
+            s = torch.relu(s) * weight_slice[..., None]
+            s = s.sum(dim=0)
+            logits[i * next_n:(i + 1) * next_n, block_rk * block_size: (block_rk + 1) * block_size] = torch.where(k_offsets[None, :] <= q_offsets[:, None], s, float('-inf'))
+    return logits
+    
+    
+    """
+    PyTorch fallback for fp8_paged_mqa_logits. 
+    No real fp8 used, just FP32.
+    Args:
+        q: (B, N, H, D)
+        kv_cache: (num_blocks, block_size, 1, D)
+        weights: (B * N, H)
+        context_lens: (B,)
+        block_tables: (B, max_blocks)
+        max_model_len: int
+    Returns:
+        logits: (B * N, max_model_len)
+    """
+    B, N, H, D = q.shape
+    block_size = kv_cache.shape[1]
+    logits = torch.full((B * N, max_model_len), float("-inf"), dtype=torch.float32, device=q.device)
+
+    for i in range(B):
+        ctx_len = context_lens[i].item()
+        q_offsets = torch.arange(ctx_len - N, ctx_len, device=q.device)
+        weight_slice = weights[i * N:(i + 1) * N, :].transpose(0, 1).contiguous()
+
+        for br in range((ctx_len + block_size - 1) // block_size):
+            blk_idx = block_tables[i, br].item()
+            if blk_idx < 0:
+                continue
+            qx = q[i]  # (N, H, D)
+            kx = kv_cache[blk_idx]  # (block_size, 1, D)
+            kx = kx.squeeze(1)  # (block_size, D)
+            k_offsets = torch.arange(br * block_size, (br + 1) * block_size, device=q.device)
+
+            mask = (k_offsets[None, :] < ctx_len) & (k_offsets[None, :] <= q_offsets[:, None])  # (N, block_size)
+            s = torch.where(mask[None, :, :],
+                            torch.einsum('nhd,ld->hnl', qx, kx),
+                            torch.full((H, N, block_size), float("-inf"), device=q.device))
+            s = s.relu() * weight_slice[..., None]
+            logits_slice = s.sum(dim=0)  # (N, block_size)
+
+            mask_block = (k_offsets[None, :] <= q_offsets[:, None])
+            logits[i * N:(i + 1) * N, br * block_size:(br + 1) * block_size] = \
+                torch.where(mask_block, logits_slice, float("-inf"))
+
+    return logits
+

python/sglang/srt/layers/attention/nsa/nsa_indexer.py

@@ -3,6 +3,7 @@ from __future__ import annotations
 from abc import ABC, abstractmethod
 from typing import TYPE_CHECKING, Any, Dict, Optional, Tuple
 
+from sglang.srt.layers.attention.nsa.fallback_fp8 import fallback_fp8_mqa_logits, fallback_fp8_paged_mqa_logits
 import torch
 import torch.nn.functional as F
 from einops import rearrange
@@ -14,7 +15,7 @@ from sglang.srt.utils import add_prefix, is_npu
 
 if not is_npu():
     from sglang.srt.layers.attention.nsa.tilelang_kernel import act_quant
-    import deep_gemm
+    #import deep_gemm
 
 from sglang.srt.layers.attention.nsa.utils import NSA_DUAL_STREAM, NSA_USE_REAL_INDEXER
 from sglang.srt.layers.dp_attention import get_attention_tp_group
@@ -27,14 +28,14 @@ from sglang.srt.model_executor.cuda_graph_runner import get_is_capture_mode
 from sglang.srt.model_executor.forward_batch_info import ForwardBatch
 from sglang.srt.utils import add_prefix, align, is_cuda
 
-try:
-    import deep_gemm_v32
-except ImportError as e:
-    print("Error when importing deep_gemm_v32, try deep_gemm")
-    try:
-        import deep_gemm as deep_gemm_v32
-    except ImportError as e:
-        print("Error when importing deep_gemm, skip")
+# try:
+#     import deep_gemm_v32
+# except ImportError as e:
+#     print("Error when importing deep_gemm_v32, try deep_gemm")
+#     try:
+#         import deep_gemm as deep_gemm_v32
+#     except ImportError as e:
+#         print("Error when importing deep_gemm, skip")
 
 
 if TYPE_CHECKING:
@@ -81,16 +82,47 @@ class BaseIndexerMetadata(ABC):
                 Don't assume it is the topk indices of the input logits.
         """
 
+def hadamard_transform_pytorch(x: torch.Tensor, scale: float) -> torch.Tensor:
+    """
+    A native PyTorch implementation of the Fast Hadamard Transform that mimics
+    the behavior of the custom CUDA kernel's call signature.
+
+    Args:
+        x (torch.Tensor): Input tensor of shape (*, N), where N is a power of 2.
+        scale (float): The normalization factor to multiply the result by.
+
+    Returns:
+        torch.Tensor: The Hadamard transformed tensor.
+    """
+    # Base case for recursion
+    if x.shape[-1] == 1:
+        return x
+
+    # Split the tensor into two halves
+    half_size = x.shape[-1] // 2
+    a = x[..., :half_size]
+    b = x[..., half_size:]
+
+    # Recursive calls
+    a_transformed = hadamard_transform_pytorch(a, scale=1.0) # No scaling in intermediate steps
+    b_transformed = hadamard_transform_pytorch(b, scale=1.0) # No scaling in intermediate steps
+
+    # Combine the results
+    combined = torch.cat([a_transformed + b_transformed, a_transformed - b_transformed], dim=-1)
+
+    # Apply the scale only at the final step
+    return combined * scale
+
 
 def rotate_activation(x: torch.Tensor) -> torch.Tensor:
     assert x.dtype == torch.bfloat16
-    from fast_hadamard_transform import hadamard_transform
+    #from fast_hadamard_transform import hadamard_transform
 
     hidden_size = x.size(-1)
     assert (
         hidden_size & (hidden_size - 1)
     ) == 0, "Hidden size must be a power of 2 for Hadamard transform."
-    return hadamard_transform(x, scale=hidden_size**-0.5)
+    return hadamard_transform_pytorch(x, scale=hidden_size**-0.5)
 
 
 class V32LayerNorm(nn.Module):
@@ -140,7 +172,7 @@ class Indexer(CustomOp):
         self.layer_id = layer_id
         self.alt_stream = alt_stream
         if not is_npu():
-            self.sm_count = deep_gemm.get_num_sms()
+            self.sm_count = torch.cuda.get_device_properties(0).multi_processor_count
             self.half_device_sm_count = align(self.sm_count // 2, 8)
 
         self.wq_b = ReplicatedLinear(
@@ -273,9 +305,7 @@ class Indexer(CustomOp):
             k_rope, _ = torch.split(
                 key, [self.rope_head_dim, self.head_dim - self.rope_head_dim], dim=-1
             )
-
         q_rope, k_rope = self.rotary_emb(positions, q_rope, k_rope)
-
         query[..., : self.rope_head_dim] = q_rope
         key[..., : self.rope_head_dim] = k_rope
 
@@ -323,9 +353,9 @@ class Indexer(CustomOp):
         blocksize = page_size
         seqlens_32 = metadata.get_seqlens_int32()
         # NOTE(dark): 132 is SM count on H200/B200, not magic number
-        schedule_metadata = deep_gemm_v32.get_paged_mqa_logits_metadata(
-            seqlens_32, blocksize, self.sm_count
-        )
+        # schedule_metadata = deep_gemm_v32.get_paged_mqa_logits_metadata(
+        #     seqlens_32, blocksize, self.sm_count
+        # )
 
         assert len(q_fp8.shape) == 3
         q_fp8 = q_fp8.unsqueeze(1)  # the next_n dim is 1 now
@@ -339,15 +369,13 @@ class Indexer(CustomOp):
         assert len(weights.shape) == 3
         weights = weights.squeeze(2)
 
-        logits = deep_gemm_v32.fp8_paged_mqa_logits(
+        logits = fallback_fp8_paged_mqa_logits(
             q_fp8,
             kv_cache_fp8,
             weights,
             seqlens_32,
             block_tables,
-            schedule_metadata,
             max_seq_len,
-            clean_logits=False,
         )
 
         # NOTE(dark): logits should be cleaned in topk_transform
@@ -408,13 +436,12 @@ class Indexer(CustomOp):
         seq_lens_expanded = metadata.get_seqlens_expanded()
         ke = ks + seq_lens_expanded
 
-        logits = deep_gemm_v32.fp8_mqa_logits(
+        logits = fallback_fp8_mqa_logits(
             q_fp8,
-            kv_fp8,
+            k_fp8,
             weights,
             ks,
-            ke,
-            clean_logits=False,
+            ke
         )
 
         assert logits.shape[0] == len(seq_lens_expanded)

python/sglang/srt/layers/attention/nsa/tilelang_kernel.py

 from typing import Optional, Tuple
 
-import tilelang
-import tilelang.language as T
+# import tilelang
+# import tilelang.language as T
 import torch
 
-tilelang.set_log_level("WARNING")
+# tilelang.set_log_level("WARNING")
 
-pass_configs = {
-    tilelang.PassConfigKey.TL_DISABLE_WARP_SPECIALIZED: True,
-    tilelang.PassConfigKey.TL_DISABLE_TMA_LOWER: True,
-    tilelang.PassConfigKey.TL_DISABLE_FAST_MATH: True,
-}
+# pass_configs = {
+#     tilelang.PassConfigKey.TL_DISABLE_WARP_SPECIALIZED: True,
+#     tilelang.PassConfigKey.TL_DISABLE_TMA_LOWER: True,
+#     tilelang.PassConfigKey.TL_DISABLE_FAST_MATH: True,
+# }
 
 BF16 = "bfloat16"
 FP8 = "float8_e4m3"
 FP32 = "float32"
 
-
+'''
 def fast_log2_ceil(x):
     bits_x = T.reinterpret("uint32", x)
     exp_x = (bits_x >> 23) & 0xFF
@@ -32,7 +32,6 @@ def fast_pow2(x):
 def fast_round_scale(amax, fp8_max_inv):
     return fast_pow2(fast_log2_ceil(amax * fp8_max_inv))
 
-
 @tilelang.jit(pass_configs=pass_configs)
 def act_quant_kernel(
     N, in_dtype=BF16, out_dtype=FP8, scale_dtype=FP32, round_scale=False
@@ -83,7 +82,6 @@ def act_quant_kernel(
 
     return act_quant_kernel_
 
-
 def act_quant(
     x: torch.Tensor, block_size: int = 128, scale_fmt: Optional[str] = None
 ) -> Tuple[torch.Tensor, torch.Tensor]:
@@ -753,7 +751,6 @@ def sparse_attention_fwd_kernel_v2(
 
     return main
 
-
 def tilelang_sparse_fwd(
     q: torch.Tensor,
     kv: torch.Tensor,
@@ -772,3 +769,45 @@ def tilelang_sparse_fwd(
         num_heads, d_v, tail_dim, topk, sm_scale=sm_scale
     )
     return kernel(q.unsqueeze(0), kv.unsqueeze(0), indices.unsqueeze(0))  # type: ignore
+'''
+def act_quant(
+    x: torch.Tensor,
+    block_size: int = 128,
+    scale_fmt: Optional[str] = None
+) -> Tuple[torch.Tensor, torch.Tensor]:
+    """
+    PyTorch fallback for act_quant
+    Block-wise FP8 E4M3 quantization
+    """
+    if not x.is_contiguous():
+        x = x.contiguous()
+
+    N = x.size(-1)
+    assert N % block_size == 0, f"Last dim {N} must be divisible by block_size={block_size}"
+
+    # Reshape to blocks
+    x_2d = x.view(-1, N)
+    x_blocks = x_2d.view(-1, block_size)
+
+    # Compute absmax per block
+    amax = x_blocks.abs().amax(dim=1, keepdim=True).clamp(min=1e-4)
+
+    # FP8 E4M3 max value is ~448
+    fp8_max = 448.0
+    scale = amax / fp8_max
+
+    if scale_fmt is not None:
+        # Simulate rounded scale (power-of-2 rounding)
+        scale = torch.round(scale * 256) / 256
+
+    # Quantize and clamp
+    y_blocks = torch.clamp(torch.round(x_blocks / scale), -fp8_max, fp8_max)
+
+    # Convert to FP8
+    q = y_blocks.view_as(x_2d).to(torch.float8_e4m3fn)
+
+    # Reshape scale
+    s = scale.view(x_2d.size(0), N // block_size).to(torch.float32)
+    s = s.view(*x.shape[:-1], N // block_size)
+
+    return q.view_as(x), s

python/sglang/srt/layers/attention/nsa/transform_index.py

@@ -105,7 +105,7 @@ def transform_index_page_table_decode_ref(
     torch.gather(
         page_table,
         dim=1,
-        index=topk_indices.clamp(min=0),
+        index=topk_indices.clamp(min=0).long(),
         out=result,
     )
     result[topk_indices < 0] = -1

python/sglang/srt/layers/attention/nsa_backend.py

@@ -10,7 +10,6 @@ from typing import (
     Tuple,
     TypeAlias,
     Union,
-    override,
 )
 
 import torch
@@ -101,19 +100,15 @@ class NSAMetadata:
 class NSAIndexerMetadata(BaseIndexerMetadata):
     attn_metadata: NSAMetadata
 
-    @override
     def get_seqlens_int32(self) -> torch.Tensor:
         return self.attn_metadata.cache_seqlens_int32
 
-    @override
     def get_page_table_64(self) -> torch.Tensor:
         return self.attn_metadata.real_page_table
 
-    @override
     def get_seqlens_expanded(self) -> torch.Tensor:
         return self.attn_metadata.nsa_seqlens_expanded
 
-    @override
     def topk_transform(
         self,
         logits: torch.Tensor,
@@ -524,21 +519,25 @@ class NativeSparseAttnBackend(AttentionBackend):
                 extend_lens_cpu=metadata.nsa_extend_seq_lens_list,
                 page_size=1,
             )
-        if NSA_PREFILL_IMPL == "tilelang":
-            from sglang.srt.layers.attention.nsa.tilelang_kernel import (
-                tilelang_sparse_fwd,
-            )
-
-            if q_rope is not None:
-                q_all = torch.cat([q_nope, q_rope], dim=-1)
-            return self._forward_tilelang(
-                q_all=q_all,
-                kv_cache=kv_cache,
-                page_table_1=page_table_1,
-                sm_scale=layer.scaling,
-                v_head_dim=layer.v_head_dim,
-            )
-        elif NSA_PREFILL_IMPL == "flashmla_prefill":
+        # if NSA_PREFILL_IMPL == "tilelang":
+        #     from sglang.srt.layers.attention.nsa.tilelang_kernel import (
+        #         tilelang_sparse_fwd,
+        #     )
+
+        #     if q_rope is not None:
+        #         q_all = torch.cat([q_nope, q_rope], dim=-1)
+        #     return self._forward_tilelang(
+        #         q_all=q_all,
+        #         kv_cache=kv_cache,
+        #         page_table_1=page_table_1,
+        #         sm_scale=layer.scaling,
+        #         v_head_dim=layer.v_head_dim,
+        #     )
+        # elif NSA_PREFILL_IMPL == "flashmla_prefill":
+        
+        
+        # Skip tilelang dependencies
+        if NSA_PREFILL_IMPL == "tilelang" or NSA_PREFILL_IMPL == "flashmla_prefill":
             if q_rope is not None:
                 q_all = torch.cat([q_nope, q_rope], dim=-1)
             return self._forward_flashmla_prefill(
@@ -733,9 +732,9 @@ class NativeSparseAttnBackend(AttentionBackend):
         page_table_1: torch.Tensor,
         sm_scale: float,
     ) -> torch.Tensor:
-        from flash_mla import flash_mla_sparse_fwd
-
-        o, _, _ = flash_mla_sparse_fwd(
+        #from flash_mla import flash_mla_sparse_fwd
+        from sglang.srt.layers.attention.native_mla import native_mla_sparse_fwd
+        _, _, o = native_mla_sparse_fwd(
             q=q_all,
             kv=kv_cache,
             indices=page_table_1.unsqueeze(1),
@@ -756,8 +755,8 @@ class NativeSparseAttnBackend(AttentionBackend):
         topk_indices,
         block_table,
     ) -> torch.Tensor:
-        from flash_mla import flash_mla_with_kvcache
-
+        #from flash_mla import flash_mla_with_kvcache
+        from sglang.srt.layers.attention.native_mla import native_mla_with_kvcache
         cache_seqlens = metadata.nsa_cache_seqlens_int32
 
         # TODO the 2nd dim is seq_len_q, need to be >1 when MTP
@@ -769,7 +768,7 @@ class NativeSparseAttnBackend(AttentionBackend):
             # inefficiently quantize the whole cache
             kv_cache = quantize_k_cache(kv_cache)
 
-        o, _ = flash_mla_with_kvcache(
+        o, _ = native_mla_with_kvcache(
             q=q_all,
             k_cache=kv_cache,
             cache_seqlens=cache_seqlens,

python/sglang/srt/layers/layernorm.py

@@ -136,21 +136,21 @@ class RMSNorm(CustomOp):
             # NOTE: Remove this if aiter kernel supports discontinuous input
             x = x.contiguous()
         if residual is not None:
-            if _vllm_version < Version("0.9"):
+            #if _vllm_version < Version("0.9"):
             fused_add_rms_norm(x, residual, self.weight.data, self.variance_epsilon)
             return x, residual
-            else:
-                residual_out = torch.empty_like(x)
-                output = torch.empty_like(x)
-                fused_add_rms_norm(
-                    output,
-                    x,
-                    residual_out,
-                    residual,
-                    self.weight.data,
-                    self.variance_epsilon,
-                )
-                return output, residual_out
+            # else:
+            #     residual_out = torch.empty_like(x)
+            #     output = torch.empty_like(x)
+            #     fused_add_rms_norm(
+            #         output,
+            #         x,
+            #         residual_out,
+            #         residual,
+            #         self.weight.data,
+            #         self.variance_epsilon,
+            #     )
+            #     return output, residual_out
         out = torch.empty_like(x)
         rms_norm(out, x, self.weight.data, self.variance_epsilon)
         return out

python/sglang/srt/layers/rotary_embedding.py

@@ -765,7 +765,10 @@ class DeepseekScalingRotaryEmbedding(RotaryEmbedding):
 
         rotate_fn = _rotate_neox if self.is_neox_style else _rotate_gptj
         query_rot = query_rot * cos + rotate_fn(query_rot) * sin
-        key_rot = key_rot * cos + rotate_fn(key_rot) * sin
+        cos_for_key = cos[:, 0, ...]  
+        sin_for_key = sin[:, 0, ...] 
+        key_rot = key_rot * cos_for_key + rotate_fn(key_rot) * sin_for_key
+        #key_rot = key_rot * cos + rotate_fn(key_rot) * sin
 
         if self.rotary_dim < self.head_size:
             query = torch.cat((query_rot, query_pass), dim=-1)