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[Refactor] Extract DeepSeek V4 sparse MLA impl into model folder #43149

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Merged
simon-mo merged 3 commits into from
May 22, 2026
Merged

[Refactor] Extract DeepSeek V4 sparse MLA impl into model folder #43149

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20cdd01
[Refactor] Extract DeepSeek V4 sparse MLA impl into model folder
zyongye May 19, 2026
c2db6a4
[Refactor] Move DeepSeek V4 sparse MLA files into nvidia/amd/ layout
zyongye May 22, 2026
997425f
Merge branch 'main' into refactor/deepseek-v4-sparse-mla-split
mergify[bot] May 22, 2026
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2 changes: 1 addition & 1 deletion docs/design/attention_backends.md
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Original file line number Diff line number Diff line change
Expand Up @@ -219,7 +219,7 @@ MLA decode backends are selected using the standard
| `FLASHINFER_MLA` | fp16, bf16 | `auto`, `float16`, `bfloat16`, `fp8`, `fp8_e4m3` | 32, 64 | Any | ❌ | ❌ | ❌ | ❌ | ❌ | Decoder | 10.x |
| `FLASHINFER_MLA_SPARSE` | fp16, bf16 | `auto`, `float16`, `bfloat16`, `fp8`, `fp8_e4m3` | 32, 64 | 576 | ❌ | ❌ | ✅ | ❌ | ❌ | Decoder | 10.x |
| `FLASHMLA` | fp16, bf16 | `auto`, `float16`, `bfloat16`, `fp8`, `fp8_e4m3` | 64 | Any | ❌ | ❌ | ❌ | ❌ | ✅ | Decoder | 9.x-10.x |
| `FLASHMLA_SPARSE` | bf16 | `auto`, `bfloat16`, `fp8_ds_mla` | 64 | 512, 576 | ❌ | ❌ | ✅ | ❌ | ❌ | Decoder | 9.x-10.x |
| `FLASHMLA_SPARSE` | bf16 | `auto`, `bfloat16`, `fp8_ds_mla` | 64 | 576 | ❌ | ❌ | ✅ | ❌ | ❌ | Decoder | 9.x-10.x |
| `FLASH_ATTN_MLA` | fp16, bf16 | `auto`, `float16`, `bfloat16` | %16 | Any | ❌ | ❌ | ❌ | ❌ | ✅ | Decoder | 9.x |
| `ROCM_AITER_MLA` | fp16, bf16 | `auto`, `float16`, `bfloat16`, `fp8`, `fp8_e4m3`, `fp8_e5m2` | %1 | Any | ❌ | ❌ | ❌ | ❌ | ❌ | Decoder | N/A |
| `ROCM_AITER_MLA_SPARSE` | fp16, bf16 | `auto`, `float16`, `bfloat16`, `fp8`, `fp8_e4m3` | 1, 64 | Any | ❌ | ❌ | ✅ | ❌ | ❌ | Decoder | N/A |
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4 changes: 2 additions & 2 deletions tests/kernels/attention/test_rocm_triton_attn_dsv4.py
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Expand Up @@ -198,7 +198,7 @@ def _ref_combine_topk_swa_ragged(

@torch.inference_mode()
def test_compute_global_topk_ragged_indices_and_indptr() -> None:
from vllm.v1.attention.backends.mla.rocm_aiter_mla_sparse_dsv4 import (
from vllm.models.deepseek_v4.attention.impl.rocm import (
compute_global_topk_ragged_indices_and_indptr,
)

Expand Down Expand Up @@ -330,7 +330,7 @@ def test_sparse_attn_decode_ragged_kernel() -> None:

@torch.inference_mode()
def test_combine_topk_swa_indices_ragged() -> None:
from vllm.v1.attention.backends.mla.rocm_aiter_mla_sparse_dsv4 import (
from vllm.models.deepseek_v4.attention.impl.rocm import (
combine_topk_swa_indices_ragged,
)

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18 changes: 18 additions & 0 deletions vllm/models/deepseek_v4/attention/__init__.py
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Original file line number Diff line number Diff line change
@@ -0,0 +1,18 @@
# SPDX-License-Identifier: Apache-2.0
# SPDX-FileCopyrightText: Copyright contributors to the vLLM project

from vllm.models.deepseek_v4.attention.deepseek_v4_attention import (
DeepseekV4Indexer,
DeepseekV4IndexerCache,
DeepseekV4MLAAttention,
DeepseekV4MLAModules,
DeepseekV4MultiHeadLatentAttentionWrapper,
)

__all__ = [
"DeepseekV4Indexer",
"DeepseekV4IndexerCache",
"DeepseekV4MLAAttention",
"DeepseekV4MLAModules",
"DeepseekV4MultiHeadLatentAttentionWrapper",
]
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