[CORE]initial support for torchair with non-mla backend (#1506)

### What this PR does / why we need it?
This PR supports torchair graph mode with non-mla backend on both 800IA2
and 300I Duo platforms. The main change is to add
`attention_v1_torchair.py` to support specific attention related
operations that are required by torchair.

### Does this PR introduce _any_ user-facing change?
Before this PR, vLLM-Ascend only allows deepseek to use torchair. Now we
can also use it with pangu. Besides, we add a support model list to
control which type of models that can use torchair.

### How was this patch tested?
We have test it with PanguProMoE on both 800IA2 and 300I Duo platforms,
and model generates answer normally.

---------

Signed-off-by: angazenn <zengyanjia@huawei.com>
Signed-off-by: tianyitang <tangtianyi4@huawei.com>
Co-authored-by: angazenn <zengyanjia@huawei.com>
Co-authored-by: tianyitang <tangtianyi4@huawei.com>

.github/workflows/doc_codespell.yaml

@@ -28,6 +28,6 @@ jobs:
       - name: Run codespell check
         run: |
           CODESPELL_EXCLUDES=('--skip' 'tests/prompts/**,./benchmarks/sonnet.txt,*tests/lora/data/**,build/**,./vllm_ascend.egg-info/**')
-          CODESPELL_IGNORE_WORDS=('-L' 'CANN,cann,NNAL,nnal,ASCEND,ascend,EnQue,CopyIn,assertIn')
+          CODESPELL_IGNORE_WORDS=('-L' 'CANN,cann,NNAL,nnal,ASCEND,ascend,EnQue,CopyIn,assertIn,rever')
 
           codespell --toml pyproject.toml "${CODESPELL_EXCLUDES[@]}" "${CODESPELL_IGNORE_WORDS[@]}"

.github/workflows/vllm_ascend_test.yaml

@@ -86,7 +86,7 @@ jobs:
       - name: Run codespell check
         run: |
           CODESPELL_EXCLUDES=('--skip' 'tests/prompts/**,./benchmarks/sonnet.txt,*tests/lora/data/**,build/**,./vllm_ascend.egg-info/**')
-          CODESPELL_IGNORE_WORDS=('-L' 'CANN,cann,NNAL,nnal,ASCEND,ascend,EnQue,CopyIn,assertIn')
+          CODESPELL_IGNORE_WORDS=('-L' 'CANN,cann,NNAL,nnal,ASCEND,ascend,EnQue,CopyIn,assertIn,rever')
 
           codespell --toml pyproject.toml "${CODESPELL_EXCLUDES[@]}" "${CODESPELL_IGNORE_WORDS[@]}"
       - name: Analysing the code with ruff

docs/source/user_guide/additional_config.md

@@ -40,14 +40,14 @@ The details of each config option are as follows:
 
 | Name | Type | Default | Description |
 | ---- | ---- | ------- | ----------- |
-| `enabled` | bool | `False` | Whether to enable torchair graph mode |
+| `enabled` | bool | `False` | Whether to enable torchair graph mode. Currently only DeepSeek series models and PanguProMoE are supported to use torchair graph mode |
-| `enable_multistream_mla`| bool | `False` | Whether to put vector ops of MLA to another stream |
+| `enable_multistream_mla`| bool | `False` | Whether to put vector ops of MLA to another stream. This option only takes effects on models using MLA (e.g., DeepSeek). |
-| `enable_multistream_moe`| bool | `False` | Whether to enable multistream shared expert |
+| `enable_multistream_moe`| bool | `False` | Whether to enable multistream shared expert. This option only takes effects on DeepSeek moe models. |
 | `enable_view_optimize` | bool | `True` | Whether to enable torchair view optimization |
 | `use_cached_graph` | bool | `False` | Whether to use cached graph |
 | `graph_batch_sizes` | list[int] | `[]` | The batch size for torchair graph cache |
 | `graph_batch_sizes_init` | bool | `False` | Init graph batch size dynamically if `graph_batch_sizes` is empty |
-| `enable_kv_nz`| bool | `False` | Whether to enable kvcache NZ layout |
+| `enable_kv_nz`| bool | `False` | Whether to enable kvcache NZ layout. This option only takes effects on models using MLA (e.g., DeepSeek). |
 
 **ascend_scheduler_config**
 

docs/source/user_guide/graph_mode.md

@@ -12,7 +12,7 @@ From v0.9.1rc1 with V1 Engine, vLLM Ascend will run models in graph mode by defa
 
 There are two kinds for graph mode supported by vLLM Ascend:
 - **ACLGraph**: This is the default graph mode supported by vLLM Ascend. In v0.9.1rc1, only Qwen series models are well tested.
-- **TorchAirGraph**: This is the GE graph mode. In v0.9.1rc1, only DeepSeek series models are supported.
+- **TorchAirGraph**: This is the GE graph mode. In v0.9.1rc1, only DeepSeek series models are supported. In v0.9.1rc2, we also support PanguProMoe with torchair.
 
 ## Using ACLGraph
 ACLGraph is enabled by default. Take Qwen series models as an example, just set to use V1 Engine is enough.

format.sh

@@ -145,7 +145,7 @@ CODESPELL_EXCLUDES=(
 )
 
 CODESPELL_IGNORE_WORDS=(
-    '-L' 'CANN,cann,NNAL,nnal,ASCEND,ascend,EnQue,CopyIn,assertIn'
+    '-L' 'CANN,cann,NNAL,nnal,ASCEND,ascend,EnQue,CopyIn,assertIn,rever'
 )
 
 # check spelling of specified files

tests/e2e/multicard/test_offline_inference_distributed.py

@@ -165,3 +165,20 @@ def test_models_distributed_DeepSeek_W8A8():
             quantization="ascend",
     ) as vllm_model:
         vllm_model.generate_greedy(example_prompts, max_tokens)
+
+
+def test_models_distributed_pangu():
+    example_prompts = [
+        "Hello, my name is",
+    ]
+    max_tokens = 5
+
+    with VllmRunner(
+            snapshot_download("vllm-ascend/pangu-pro-moe-pruing"),
+            max_model_len=8192,
+            enforce_eager=True,
+            dtype="auto",
+            tensor_parallel_size=4,
+            distributed_executor_backend="mp",
+    ) as vllm_model:
+        vllm_model.generate_greedy(example_prompts, max_tokens)

tests/e2e/multicard/test_torchair_graph_mode.py

@@ -99,3 +99,63 @@ def test_e2e_deepseekv3_with_torchair_ms_mla():
         },
     }
     _deepseek_torchair_test_fixture(additional_config)
+
+
+def _pangu_torchair_test_fixture(
+    additional_config: Dict,
+    *,
+    tensor_parallel_size=4,
+):
+    example_prompts = [
+        "Hello, my name is",
+        "The president of the United States is",
+        "The capital of France is",
+        "The future of AI is",
+    ]
+
+    # torchair is only work without chunked-prefill now
+    kwargs = {
+        "ascend_scheduler_config": {
+            "enabled": True,
+        },
+        "refresh": True,
+    }
+    additional_config.update(**kwargs)
+
+    with VllmRunner(
+            "vllm-ascend/pangu-pro-moe-pruing",
+            dtype="half",
+            tensor_parallel_size=tensor_parallel_size,
+            distributed_executor_backend="mp",
+            enforce_eager=False,
+            additional_config=additional_config,
+    ) as vllm_model:
+        # use greedy sampler to make sure the generated results are fix
+        vllm_output = vllm_model.generate_greedy(example_prompts, 5)
+
+    # NOTE: vllm-ascend/pangu-pro-moe-pruing is only part of PanguProMoE
+    # with 2 hidden layers, thus the golden results seems inaccurate.
+    # This will only change if accuracy changes with the official weights
+    # of PanguProMoE.
+    golden_results = [
+        'Hello, my name is Remempondeprecatedmiot忱',
+        'The president of the United States is Remem下的一个 rever ceremoni Segnali',
+        'The capital of France is Rememvoud administrativ Remem投',
+        'The future of AI isotope Segnali Zoeken精细化 supus',
+    ]
+
+    assert len(golden_results) == len(vllm_output)
+    for i in range(len(vllm_output)):
+        assert golden_results[i] == vllm_output[i][1]
+        print(f"Generated text: {vllm_output[i][1]!r}")
+
+
+@pytest.mark.skipif(os.getenv("VLLM_USE_V1") == "0",
+                    reason="torchair graph is not supported on v0")
+def test_e2e_pangu_with_torchair():
+    additional_config = {
+        "torchair_graph_config": {
+            "enabled": True,
+        },
+    }
+    _pangu_torchair_test_fixture(additional_config)

tests/ut/ops/test_rotary_embedding.py

@@ -0,0 +1,315 @@
+import math
+import unittest
+from unittest.mock import MagicMock, patch
+
+import torch
+
+from tests.ut.base import TestBase
+from vllm_ascend.ops.rotary_embedding import (custom_rotary_embedding_enabled,
+                                              native_rope_deepseek_forward,
+                                              rope_forward_oot, rotate_half,
+                                              yarn_find_correction_dim,
+                                              yarn_get_mscale)
+
+
+class TestCustomRotaryEmbeddingEnabled(unittest.TestCase):
+
+    def setUp(self):
+        # Common setup for tests
+        self.positions = torch.tensor([1, 2, 3])
+        self.query = torch.randn(3, 4, dtype=torch.float16)
+        self.key = torch.randn(3, 4, dtype=torch.float16)
+        self.head_size = 32
+        self.cos_sin_cache = torch.randn(3, 4)
+
+        # Mock self object for rope_forward_oot
+        self.mock_self = MagicMock()
+        self.mock_self.head_size = self.head_size
+        self.mock_self.cos_sin_cache = self.cos_sin_cache
+        self.mock_self.is_neox_style = True
+        self.mock_self.forward_native.return_value = (self.query, self.key)
+
+    def test_custom_rotary_embedding_enabled(self):
+        # Test when all conditions are True
+        with patch('vllm_ascend.ops.rotary_embedding.enable_custom_op',
+                   return_value=True):
+            result = custom_rotary_embedding_enabled(self.query, True,
+                                                     self.head_size)
+            self.assertTrue(result)
+
+        # Test when dtype is not float16
+        with patch('vllm_ascend.ops.rotary_embedding.enable_custom_op',
+                   return_value=True):
+            query = self.query.to(torch.float32)
+            result = custom_rotary_embedding_enabled(query, True,
+                                                     self.head_size)
+            self.assertFalse(result)
+
+        # Test when neox_style is False
+        with patch('vllm_ascend.ops.rotary_embedding.enable_custom_op',
+                   return_value=True):
+            result = custom_rotary_embedding_enabled(self.query, False,
+                                                     self.head_size)
+            self.assertFalse(result)
+
+        # Test when head_size is not divisible by 32
+        with patch('vllm_ascend.ops.rotary_embedding.enable_custom_op',
+                   return_value=True):
+            result = custom_rotary_embedding_enabled(self.query, True,
+                                                     self.head_size + 1)
+            self.assertFalse(result)
+
+        # Test when custom op is disabled
+        with patch('vllm_ascend.ops.rotary_embedding.enable_custom_op',
+                   return_value=False):
+            result = custom_rotary_embedding_enabled(self.query, True,
+                                                     self.head_size)
+            self.assertFalse(result)
+
+
+class TestRopeForwardOot(unittest.TestCase):
+
+    def setUp(self):
+        # Common setup for tests
+        self.positions = torch.tensor([1, 2, 3])
+        self.query = torch.randn(3, 4, dtype=torch.float16)
+        self.key = torch.randn(3, 4, dtype=torch.float16)
+        self.head_size = 32
+        self.cos_sin_cache = torch.randn(3, 4)
+
+        # Mock self object for rope_forward_oot
+        self.mock_self = MagicMock()
+        self.mock_self.head_size = self.head_size
+        self.mock_self.cos_sin_cache = self.cos_sin_cache
+        self.mock_self.is_neox_style = True
+        self.mock_self.forward_native.return_value = (self.query, self.key)
+
+    @patch('vllm_ascend.ops.rotary_embedding.get_ascend_config')
+    def test_rope_forward_oot_torchair_enabled_base(self,
+                                                    mock_get_ascend_config):
+        # Setup mock for torchair enabled
+        mock_config = MagicMock()
+        mock_config.torchair_graph_config.enabled = True
+        mock_get_ascend_config.return_value = mock_config
+
+        result_q, result_k = rope_forward_oot(self.mock_self, self.positions,
+                                              self.query, self.key)
+
+        self.mock_self.forward_native.assert_called_once_with(
+            self.positions, self.query, self.key, None)
+        self.assertTrue(torch.equal(result_q, self.query))
+        self.assertTrue(torch.equal(result_k, self.key))
+
+    @patch('torch.ops._C')
+    @patch('vllm_ascend.ops.rotary_embedding.get_ascend_config')
+    @patch('vllm_ascend.ops.rotary_embedding.is_310p', return_value=False)
+    @patch('vllm_ascend.ops.rotary_embedding.custom_rotary_embedding_enabled',
+           return_value=True)
+    @patch('torch.ops._npu_rotary_embedding')
+    def test_rope_forward_oot_custom_kernel(self, mock_rotary_embedding,
+                                            mock_custom_enabled, mock_is_310p,
+                                            mock_get_ascend_config, mock__c):
+        mock_config = MagicMock()
+        mock_config.torchair_graph_config.enabled = False
+        mock_get_ascend_config.return_value = mock_config
+
+        # Setup mock for custom kernel path
+
+        mock__c.rotary_embedding.return_value = self.query, self.key
+
+        result_q, result_k = rope_forward_oot(self.mock_self, self.positions,
+                                              self.query, self.key)
+
+        self.assertEqual(result_q.shape, self.query.shape)
+        self.assertEqual(result_k.shape, self.key.shape)
+
+    @patch('vllm_ascend.ops.rotary_embedding.get_ascend_config')
+    @patch('vllm_ascend.ops.rotary_embedding.custom_rotary_embedding_enabled',
+           return_value=False)
+    @patch('torch_npu._npu_rotary_embedding')
+    def test_rope_forward_oot_contiguous(self, mock_npu_rotary,
+                                         mock_custom_enabled,
+                                         mock_get_ascend_config):
+        mock_config = MagicMock()
+        mock_config.torchair_graph_config.enabled = False
+        mock_get_ascend_config.return_value = mock_config
+
+        # Test contiguous path when custom is disabled
+        non_contig_query = self.query.transpose(0, 1)
+        non_contig_key = self.key.transpose(0, 1)
+
+        result_q, result_k = rope_forward_oot(self.mock_self, self.positions,
+                                              non_contig_query, non_contig_key)
+
+        mock_npu_rotary.assert_called_once()
+        self.assertEqual(result_q.shape, non_contig_query.shape)
+        self.assertEqual(result_k.shape, non_contig_key.shape)
+
+    @patch('vllm_ascend.ops.rotary_embedding.get_ascend_config')
+    def test_rope_forward_oot_with_offsets(self, mock_get_ascend_config):
+        mock_config = MagicMock()
+        mock_config.torchair_graph_config.enabled = False
+        mock_get_ascend_config.return_value = mock_config
+
+        # Test that NotImplementedError is raised when offsets is provided
+        offsets = torch.tensor([1, 2, 3])
+        with self.assertRaises(NotImplementedError):
+            rope_forward_oot(self.mock_self, self.positions, self.query,
+                             self.key, offsets)
+
+    @patch('vllm_ascend.ops.rotary_embedding.get_ascend_config')
+    @patch('vllm_ascend.ops.rotary_embedding.custom_rotary_embedding_enabled',
+           return_value=False)
+    @patch('torch_npu._npu_rotary_embedding')
+    def test_rope_forward_oot_neox_style_override(self, mock_npu_rotary,
+                                                  mock_custom_enabled,
+                                                  mock_get_ascend_config):
+        mock_config = MagicMock()
+        mock_config.torchair_graph_config.enabled = False
+        mock_get_ascend_config.return_value = mock_config
+
+        # Test neox_style override
+        result_q, result_k = rope_forward_oot(self.mock_self,
+                                              self.positions,
+                                              self.query,
+                                              self.key,
+                                              is_neox_style_override=False)
+
+        # Check that neox_style=False was passed to the NPU function
+        args, kwargs = mock_npu_rotary.call_args
+        self.assertFalse(args[-1])
+
+
+class MockRopeModule:
+
+    def __init__(self, max_seq_len=2048, is_neox_style=True):
+        self.max_seq_len = max_seq_len
+        self.is_neox_style = is_neox_style
+        self.cos_cached = None
+        self.sin_cached = None
+        self.rotary_dim = 1
+        self.base = 1
+
+
+class TestNativeRopeDeepseekForward(TestBase):
+
+    @patch('vllm_ascend.ops.rotary_embedding.rope_forward_oot')
+    def test_native_rope_deepseek_forward_base(self, mock_rope_forward_oot):
+        module = MockRopeModule()
+        positions = torch.tensor([1, 2, 3])
+        query = torch.randn(1, 8, 128)
+        key = torch.randn(1, 8, 128)
+
+        mock_rope_forward_oot.return_value = (query, key)
+
+        q_pe, k_pe = native_rope_deepseek_forward(module, positions, query,
+                                                  key)
+
+        assert q_pe.shape == query.shape
+        assert k_pe.shape == key.shape
+
+    @patch('vllm_ascend.ops.rotary_embedding._set_cos_sin_cache')
+    @patch('vllm_ascend.ops.rotary_embedding.rope_forward_oot')
+    def test_native_rope_deepseek_forward_cache_handling(
+            self, mock_rope_forward_oot, mock_set_cache):
+        # Test cache situation is true
+        module = MockRopeModule(max_seq_len=1024)
+        positions = torch.tensor([1, 2, 3])
+        query = torch.randn(1, 8, 128)
+        key = torch.randn(1, 8, 128)
+
+        mock_rope_forward_oot.return_value = (query, key)
+
+        q_pe, k_pe = native_rope_deepseek_forward(module,
+                                                  positions,
+                                                  query,
+                                                  key,
+                                                  max_seq_len=2048)
+
+        assert q_pe.shape == query.shape
+        assert k_pe.shape == key.shape
+
+    @patch('vllm_ascend.ops.rotary_embedding.rope_forward_oot')
+    def test_native_rope_deepseek_forward_key_reshaping(
+            self, mock_rope_forward_oot):
+        module = MockRopeModule()
+        positions = torch.tensor([1, 2, 3])
+        query = torch.randn(1, 8, 128)
+        key = torch.randn(1, 128)
+
+        mock_rope_forward_oot.return_value = (query, key)
+
+        q_pe, k_pe = native_rope_deepseek_forward(module, positions, query,
+                                                  key)
+
+        assert q_pe.shape == query.shape
+        assert k_pe.shape == (1, 128)
+
+    @patch('vllm_ascend.ops.rotary_embedding.rope_forward_oot')
+    def test_native_rope_deepseek_forward_non_neox_style(
+            self, mock_rope_forward_oot):
+        module = MockRopeModule(is_neox_style=False)
+        positions = torch.tensor([1, 2, 3])
+        query = torch.randn(1, 8, 128)
+        key = torch.randn(1, 8, 128)
+
+        mock_rope_forward_oot.return_value = (query, key)
+
+        q_pe, k_pe = native_rope_deepseek_forward(module, positions, query,
+                                                  key)
+
+        assert q_pe.shape == query.shape
+        assert k_pe.shape == key.shape
+
+
+class TestRotateHalf(unittest.TestCase):
+
+    def test_rotate_half_even_dim(self):
+        # Test with even dimension
+        x = torch.tensor([1.0, 2.0, 3.0, 4.0])
+        expected = torch.tensor([-3.0, -4.0, 1.0, 2.0])
+        result = rotate_half(x)
+        self.assertTrue(torch.allclose(result, expected))
+
+
+class TestYarnFindCorrectionDim(unittest.TestCase):
+
+    def test_basic_case(self):
+        # Test with standard values
+        num_rotations = 100
+        dim = 512
+        base = 10000
+        max_position_embeddings = 2048
+
+        result = yarn_find_correction_dim(num_rotations, dim, base,
+                                          max_position_embeddings)
+
+        # Calculate expected value manually
+        expected = (dim * torch.log(
+            torch.tensor(max_position_embeddings) /
+            (num_rotations * 2 * torch.pi))) / (2 *
+                                                torch.log(torch.tensor(base)))
+
+        self.assertTrue(torch.allclose(result, expected))
+
+
+class TestYarnGetMscale(unittest.TestCase):
+
+    def test_scale_less_than_or_equal_1(self):
+        self.assertEqual(yarn_get_mscale(scale=0.5), 1.0)
+        self.assertEqual(yarn_get_mscale(scale=1.0), 1.0)
+        self.assertEqual(yarn_get_mscale(scale=0.999), 1.0)
+
+    def test_scale_greater_than_1(self):
+        test_cases = [(2.0, 1.0, 1.0 + 0.1 * math.log(2.0)),
+                      (10.0, 1.0, 1.0 + 0.1 * math.log(10.0)),
+                      (5.0, 2.0, 1.0 + 0.2 * math.log(5.0)),
+                      (math.e, 1.0, 1.0 + 0.1)]
+
+        for scale, mscale, expected in test_cases:
+            result = yarn_get_mscale(scale, mscale)
+            self.assertAlmostEqual(
+                result,
+                expected,
+                places=6,
+                msg=f"Failed for scale={scale}, mscale={mscale}")

tests/ut/quantization/test_w8a8.py

@@ -381,6 +381,58 @@ class TestAscendC8KVCacheMethod(TestBase):
             self.assertEqual(mock_scatter.call_count, 2)
             self.assertTrue(torch.equal(result, expected_output))
 
+    @patch('torch_npu.npu_scatter_nd_update_')
+    @patch("vllm_ascend.quantization.w8a8.quant_per_tensor")
+    def test_apply_attn_metadata_without_decode(self, mock_quant,
+                                                mock_scatter):
+
+        num_tokens = 2
+        query = torch.randn(num_tokens,
+                            self.layer.num_heads * self.layer.head_size)
+        key = torch.randn(num_tokens,
+                          self.layer.num_kv_heads * self.layer.head_size)
+        value = torch.randn(num_tokens,
+                            self.layer.num_kv_heads * self.layer.head_size)
+        output = torch.empty_like(query)
+
+        attn_metadata = MagicMock(spec=[
+            'attn_state', 'seq_lens', 'block_tables', 'slot_mapping',
+            'attn_mask'
+        ])
+        attn_metadata.attn_state = AscendAttentionState.DecodeOnly
+        attn_metadata.seq_lens = [10, 10]
+        attn_metadata.block_tables = torch.tensor([[0, 1], [1, 2]])
+        attn_metadata.slot_mapping = torch.tensor([0, 1])
+        attn_metadata.attn_mask = None
+
+        block_size = 16
+        key_cache = torch.empty(2, block_size, self.layer.num_kv_heads,
+                                self.layer.head_size)
+        value_cache = torch.empty(2, block_size, self.layer.num_kv_heads,
+                                  self.layer.head_size)
+        kv_cache = (key_cache, value_cache)
+
+        mock_quant.side_effect = [key, value]
+
+        self.layer.key_antiquant_scale.data = torch.ones(
+            self.layer.num_kv_heads * self.layer.head_size)
+        self.layer.value_antiquant_scale.data = torch.ones(
+            self.layer.num_kv_heads * self.layer.head_size)
+        self.method.process_weights_after_loading(self.layer)
+
+        expected_output = torch.randn(
+            num_tokens, self.layer.num_heads * self.layer.head_size)
+        with patch('torch_npu.npu_incre_flash_attention',
+                   return_value=expected_output):
+            result = self.method.apply(self.layer, query, key, value, kv_cache,
+                                       attn_metadata,
+                                       self.attention_type.DECODER, 1.0,
+                                       output)
+
+            self.assertEqual(mock_quant.call_count, 2)
+            self.assertEqual(mock_scatter.call_count, 2)
+            self.assertTrue(torch.equal(result, expected_output))
+
     @patch("vllm_ascend.quantization.w8a8.quant_per_tensor")
     @patch('torch_npu._npu_flash_attention')
     def test_apply_prefill_no_cache(self, mock_flash, mock_quant):

tests/ut/test_ascend_config.py

@@ -6,6 +6,7 @@ from transformers import PretrainedConfig
 from vllm.config import ModelConfig, VllmConfig
 
 from vllm_ascend.ascend_config import (check_ascend_config,
+                                       check_torchair_supported,
                                        clear_ascend_config, get_ascend_config,
                                        init_ascend_config)
 
@@ -242,3 +243,10 @@ class TestAscendConfig(unittest.TestCase):
                 test_vllm_config.model_config = fake_model_config
                 init_ascend_config(test_vllm_config)
                 check_ascend_config(test_vllm_config, False)
+
+    def test_check_torchair_supported(self):
+        test_cases = [('deepseek_v3', True), ('PanguProMoE', True),
+                      ('qwen', False), ('llama', False)]
+        for model_type, expected_output in test_cases:
+            self.assertEqual(check_torchair_supported(model_type),
+                             expected_output)

tests/ut/test_platform.py

@@ -292,23 +292,6 @@ class TestNPUPlatform(TestBase):
             self.platform.check_and_update_config(self.mock_vllm_config)
         self.assertTrue("Model config is missing" in cm.output[0])
 
-    @patch("vllm_ascend.utils.is_310p", return_value=False)
-    @patch("vllm_ascend.ascend_config.check_ascend_config")
-    @patch("vllm_ascend.ascend_config.init_ascend_config")
-    @patch("vllm.envs.VLLM_MLA_DISABLE", True)
-    def test_check_and_update_config_torchair_graph_disabled_when_mla_disabled(
-            self, mock_init_ascend, mock_check_ascend, mock_is_310p):
-        self.mock_ascend_config.torchair_graph_config.enabled = True
-        mock_init_ascend.return_value = self.mock_ascend_config
-
-        from vllm_ascend import platform
-
-        importlib.reload(platform)
-
-        self.platform.check_and_update_config(self.mock_vllm_config)
-
-        self.assertFalse(self.mock_ascend_config.torchair_graph_config.enabled)
-
     @patch("vllm_ascend.utils.is_310p", return_value=False)
     @patch("vllm_ascend.ascend_config.check_ascend_config")
     @patch("vllm_ascend.ascend_config.init_ascend_config")
@@ -502,7 +485,13 @@ class TestNPUPlatform(TestBase):
             self.platform.check_and_update_config(self.mock_vllm_config)
             mock_scheduler.initialize_from_config.assert_called_once()
 
-    def test_get_attn_backend_cls_use_v1_and_mla(self):
+    @patch('vllm_ascend.platform.get_ascend_config')
+    def test_get_attn_backend_cls_use_v1_and_mla(self, mock_get_ascend_config):
+        mock_config = MagicMock()
+        mock_config.torchair_graph_config.enabled = False
+
+        mock_get_ascend_config.return_value = mock_config
+
         result = self.platform.get_attn_backend_cls(
             selected_backend="ascend",
             head_size=64,
@@ -515,7 +504,35 @@ class TestNPUPlatform(TestBase):
         self.assertEqual(result,
                          "vllm_ascend.attention.mla_v1.AscendMLABackend")
 
-    def test_get_attn_backend_cls_use_v1_only(self):
+    @patch('vllm_ascend.platform.get_ascend_config')
+    def test_get_attn_backend_cls_use_v1_and_torchair(self,
+                                                      mock_get_ascend_config):
+        mock_config = MagicMock()
+        mock_config.torchair_graph_config.enabled = True
+
+        mock_get_ascend_config.return_value = mock_config
+
+        result = self.platform.get_attn_backend_cls(
+            selected_backend="ascend",
+            head_size=64,
+            dtype="float16",
+            kv_cache_dtype="float16",
+            block_size=64,
+            use_v1=True,
+            use_mla=False,
+        )
+        self.assertEqual(
+            result,
+            "vllm_ascend.attention.attention_v1_torchair.AscendAttentionTorchairBackend"
+        )
+
+    @patch('vllm_ascend.platform.get_ascend_config')
+    def test_get_attn_backend_cls_use_v1_only(self, mock_get_ascend_config):
+        mock_config = MagicMock()
+        mock_config.torchair_graph_config.enabled = False
+
+        mock_get_ascend_config.return_value = mock_config
+
         result = self.platform.get_attn_backend_cls(
             selected_backend="ascend",
             head_size=64,
@@ -529,7 +546,13 @@ class TestNPUPlatform(TestBase):
             result,
             "vllm_ascend.attention.attention_v1.AscendAttentionBackend")
 
-    def test_get_attn_backend_cls_use_mla_only(self):
+    @patch('vllm_ascend.platform.get_ascend_config')
+    def test_get_attn_backend_cls_use_mla_only(self, mock_get_ascend_config):
+        mock_config = MagicMock()
+        mock_config.torchair_graph_config.enabled = False
+
+        mock_get_ascend_config.return_value = mock_config
+
         result = self.platform.get_attn_backend_cls(
             selected_backend="ascend",
             head_size=64,
@@ -543,7 +566,13 @@ class TestNPUPlatform(TestBase):
             result,
             "vllm_ascend.attention.attention.AscendMLAAttentionBackend")
 
-    def test_get_attn_backend_cls_default_case(self):
+    @patch('vllm_ascend.platform.get_ascend_config')
+    def test_get_attn_backend_cls_default_case(self, mock_get_ascend_config):
+        mock_config = MagicMock()
+        mock_config.torchair_graph_config.enabled = False
+
+        mock_get_ascend_config.return_value = mock_config
+
         result = self.platform.get_attn_backend_cls(
             selected_backend="ascend",
             head_size=64,

vllm_ascend/ascend_config.py

@@ -18,6 +18,15 @@ from typing import Optional
 import vllm.envs as envs
 from vllm.logger import logger
 
+TORCHAIR_MODEL_LIST = ["deepseek", "pangu"]
+
+
+def check_torchair_supported(model_type: str):
+    for supported_model in TORCHAIR_MODEL_LIST:
+        if supported_model in model_type.lower():
+            return True
+    return False
+
 
 class AscendConfig:
     """
@@ -141,10 +150,10 @@ def check_ascend_config(vllm_config, enforce_eager):
                 # torchair_graph is supported for deepseek model only currently.
                 if vllm_config.model_config:
                     model_type = vllm_config.model_config.hf_config.model_type
-                    if "deepseek" not in model_type:
+                    if not check_torchair_supported(model_type):
                         raise NotImplementedError(
-                            "Torchair graph mode only works with deepseek model."
+                            "Torchair graph mode only works with following model types:"
-                        )
+                            f"{TORCHAIR_MODEL_LIST}.")
             # aclgraph case
             else:
                 # aclgraph doesn't work with deepseek model and only qwen model is well tested.

vllm_ascend/attention/attention_v1_torchair.py

@@ -0,0 +1,506 @@
+#
+# Copyright (c) 2025 Huawei Technologies Co., Ltd. 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.
+# This file is a part of the vllm-ascend project.
+#
+
+from dataclasses import dataclass
+from typing import Any, Dict, List, Optional, Tuple, Type
+
+import numpy as np
+import torch
+import torch_npu
+from vllm.attention.backends.abstract import (AttentionBackend, AttentionImpl,
+                                              AttentionLayer, AttentionType)
+from vllm.attention.backends.utils import PAD_SLOT_ID, CommonAttentionState
+from vllm.v1.core.sched.output import SchedulerOutput
+from vllm.v1.worker.gpu_input_batch import InputBatch
+
+from vllm_ascend.ascend_config import get_ascend_config
+from vllm_ascend.attention.attention_v1 import AscendAttentionState
+from vllm_ascend.utils import (ACL_FORMAT_FRACTAL_NZ, aligned_16, is_310p,
+                               nd_to_nz_2d)
+
+
+class AscendAttentionTorchairBackend(AttentionBackend):
+    accept_output_buffer: bool = True
+
+    @staticmethod
+    def get_name() -> str:
+        return "ASCEND"
+
+    @staticmethod
+    def get_impl_cls() -> Type["AscendAttentionTorchairBackendImpl"]:
+        return AscendAttentionTorchairBackendImpl
+
+    @staticmethod
+    def get_metadata_cls() -> Type["AscendTorchairMetadata"]:
+        return AscendTorchairMetadata
+
+    @staticmethod
+    def get_state_cls() -> Type["CommonAttentionState"]:
+        return CommonAttentionState
+
+    @staticmethod
+    def get_builder_cls() -> type["AscendAttentionTorchairMetadataBuilder"]:
+        return AscendAttentionTorchairMetadataBuilder
+
+    @staticmethod
+    def get_kv_cache_shape(
+        num_blocks: int,
+        block_size: int,
+        num_kv_heads: int,
+        head_size: int,
+    ) -> Tuple[int, ...]:
+        return (num_blocks, block_size, num_kv_heads * head_size)
+
+    @staticmethod
+    def get_bsh_kv_cache_shape(
+        num_blocks: int,
+        block_size: int,
+        num_kv_heads: int,
+        head_size: int,
+    ) -> Tuple[int, ...]:
+        return (num_blocks, block_size, num_kv_heads * head_size)
+
+    @staticmethod
+    def swap_blocks(
+        src_kv_cache: List[torch.Tensor],
+        dst_kv_cache: List[torch.Tensor],
+        src_to_dst: torch.Tensor,
+    ) -> None:
+        src_key_cache, src_value_cache = src_kv_cache[0], src_kv_cache[1]
+        dst_key_cache, dst_value_cache = dst_kv_cache[0], dst_kv_cache[1]
+        src_indices = src_to_dst[:, 0]
+        dst_indices = src_to_dst[:, 1]
+
+        dst_key_cache[dst_indices] = src_key_cache[src_indices].to(
+            dst_key_cache.device)
+        dst_value_cache[dst_indices] = src_value_cache[src_indices].to(
+            dst_key_cache.device)
+
+    @staticmethod
+    def copy_blocks(
+        kv_caches: List[torch.Tensor],
+        src_to_dists: torch.Tensor,
+    ) -> None:
+        src_indices = src_to_dists[:, 0]
+        dst_indices = src_to_dists[:, 1]
+
+        for kv_cache in kv_caches:
+            key_caches = kv_cache[0]
+            value_caches = kv_cache[1]
+            key_caches[dst_indices] = key_caches[src_indices]
+            value_caches[dst_indices] = value_caches[src_indices]
+
+
+@dataclass
+class AscendDecodeMetadata:
+    # Input positions for rotrary embeddings since for MLA the rotary
+    # position embeddings are applied inside the attention backend
+    input_positions: torch.Tensor
+    block_table: torch.Tensor
+    seq_lens: torch.Tensor
+    max_seq_lens: int
+    seq_lens_list: list[int]
+    attn_mask: Optional[torch.Tensor] = None
+
+
+@dataclass
+class AscendTorchairMetadata:
+    num_actual_tokens: int  # Number of tokens excluding padding.
+    # (batch_size, max_blocks_per_seq).
+    # Block addresses per sequence. (Seq id -> list of physical block)
+    block_tables: torch.Tensor
+    # (batch_size,). The sequence length per sequence. Sequence length means
+    # the computed tokens + new tokens None if it is a decoding.
+    query_start_loc: torch.Tensor
+    query_lens: torch.Tensor
+    seq_lens: torch.Tensor
+
+    # max value of number of tokens across dp group
+    max_num_tokens_across_dp: int = 0
+
+    # Maximum query length in the batch. None for decoding.
+    max_query_len: Optional[int] = None
+    # (num_tokens,). The indices of the token slots that input tokens will be
+    # stored into. E.g., if `slot_mapping` is [35, 2, 17] and the block size
+    # is 16, the three tokens are stored in the 3rd slot in block 2, 2nd slot
+    # in block 0, and 1st slot in block 1, respectively.
+    slot_mapping: torch.Tensor = None
+    # TODO: Indicates whether there are only prefill requests.
+    # FlashAttention can be used when there are only prefill requests.
+    # FlashAttention has better performance than PageAtttention,
+    # but it does not support decode requests.
+    is_only_prefill: bool = False
+    # Current state of this attention run.
+    attn_state: AscendAttentionState = AscendAttentionState.ChunkedPrefill
+    attn_mask: Optional[torch.Tensor] = None
+
+    # For logging.
+    num_input_tokens: int = 0  # Number of tokens including padding.
+
+    with_prefill_across_dp: bool = False
+
+    decode: Optional[AscendDecodeMetadata] = None
+
+
+class AscendAttentionTorchairMetadataBuilder:
+
+    def __init__(self, runner):
+        self.runner = runner
+        self.torchair_graph_enabled = get_ascend_config(
+        ).torchair_graph_config.enabled
+
+    def reorder_batch(self, input_batch: "InputBatch",
+                      scheduler_output: "SchedulerOutput") -> bool:
+        return False
+
+    def _get_graph_runner_block_tables(
+            self, num_seqs: int, block_tables: torch.Tensor) -> torch.Tensor:
+
+        max_batch_size, max_blocks = self.runner.graph_block_tables.shape
+        assert max_batch_size >= num_seqs
+
+        if isinstance(self.runner.graph_block_tables, np.ndarray):
+            graph_block_tables = torch.zeros((max_batch_size, max_blocks),
+                                             dtype=block_tables.dtype,
+                                             device=block_tables.device)
+        else:
+            graph_block_tables = self.runner.graph_block_tables.to(
+                device=block_tables.device, dtype=block_tables.dtype)
+
+        num_blocks = block_tables.size(1)
+        if num_blocks <= max_blocks:
+            graph_block_tables[:num_seqs, :
+                               num_blocks] = block_tables[:num_seqs, :
+                                                          num_blocks]
+        else:
+            graph_block_tables[:num_seqs, :
+                               max_blocks] = block_tables[:num_seqs, :
+                                                          max_blocks]
+
+        return graph_block_tables[:num_seqs, :max_blocks]
+
+    def build_dummy(self, num_reqs: int,
+                    num_actual_tokens: int) -> AscendTorchairMetadata:
+        device = self.runner.device
+        _, max_blocks = self.runner.graph_block_tables.shape
+        block_table = torch.zeros((num_reqs, max_blocks),
+                                  dtype=torch.int32,
+                                  device=device)
+        block_table = self._get_graph_runner_block_tables(
+            num_reqs, block_table)
+        seq_lens = torch.ones(num_reqs, dtype=torch.int32, device=device)
+        input_positions = torch.zeros(num_reqs,
+                                      dtype=torch.int32,
+                                      device=device).long()
+        slot_mapping = torch.full((num_reqs, ),
+                                  PAD_SLOT_ID,
+                                  dtype=torch.int32,
+                                  device=device)
+        query_start_loc = torch.full((num_reqs, ),
+                                     -1,
+                                     dtype=torch.int32,
+                                     device=device)
+
+        decode_metadata = AscendDecodeMetadata(input_positions=input_positions,
+                                               block_table=block_table,
+                                               seq_lens=seq_lens,
+                                               seq_lens_list=seq_lens.tolist(),
+                                               max_seq_lens=1)
+
+        attn_metadata = AscendTorchairMetadata(
+            num_actual_tokens=num_actual_tokens,
+            block_tables=block_table,
+            query_lens=0,
+            query_start_loc=query_start_loc,
+            seq_lens=seq_lens,
+            slot_mapping=slot_mapping,
+            attn_state=AscendAttentionState.DecodeOnly,
+            max_num_tokens_across_dp=num_reqs,
+            decode=decode_metadata)
+        return attn_metadata
+
+    def build(self,
+              num_reqs,
+              num_actual_tokens,
+              max_query_len,
+              common_prefix_len,
+              graph_pad_size: int = -1,
+              max_num_tokens_across_dp: int = 0,
+              with_prefill_across_dp: bool = False):
+
+        device = self.runner.device
+
+        block_table = self.runner.input_batch.block_table[0].get_device_tensor(
+        )
+        block_table[:num_reqs, :self.runner.max_num_blocks_per_req] = (
+            block_table[:num_reqs])
+
+        query_lens = self.runner.query_lens
+        seq_lens = self.runner.seq_lens_cpu[:num_reqs]
+        slot_mapping = self.runner.slot_mapping_cpu[:num_actual_tokens].to(
+            self.runner.device, non_blocking=True)
+        attn_mask = self.runner.attn_mask
+
+        attn_state = self.runner.attn_state
+        if is_310p() and attn_state == AscendAttentionState.PrefillNoCache:
+            mask_nz = nd_to_nz_2d(attn_mask)
+            attn_mask = torch_npu.npu_format_cast(mask_nz.contiguous(), 29)
+
+        query_start_loc_cpu = self.runner.query_start_loc_cpu[:num_reqs + 1]
+        query_start_loc = query_start_loc_cpu.to(self.runner.device,
+                                                 non_blocking=True)
+        input_positions = self.runner.positions_cpu[:num_actual_tokens].to(
+            device, non_blocking=True).long()
+
+        decode_metadata = None
+        use_torchair_graph = graph_pad_size > -1
+        if self.runner.attn_state in [
+                AscendAttentionState.DecodeOnly,
+        ]:
+            max_seq_lens = seq_lens.max().item()
+            num_seqs = len(seq_lens)
+            if use_torchair_graph and self.runner.attn_state in [
+                    AscendAttentionState.DecodeOnly,
+            ]:
+                max_num_tokens_across_dp += graph_pad_size
+                pad_value = 1
+                padded_seq_lens = seq_lens.tolist() + [pad_value
+                                                       ] * graph_pad_size
+
+                seq_lens = torch.from_numpy(
+                    np.array(padded_seq_lens).astype(np.int32))
+                padding = torch.full((graph_pad_size, ),
+                                     PAD_SLOT_ID,
+                                     dtype=slot_mapping.dtype,
+                                     device=slot_mapping.device)
+                slot_mapping = torch.cat([slot_mapping, padding])
+                block_table_padding = torch.zeros(
+                    (graph_pad_size, ) + block_table.shape[1:],
+                    dtype=block_table.dtype,
+                    device=block_table.device)
+                block_table = torch.cat([block_table, block_table_padding],
+                                        dim=0)
+                block_table = self._get_graph_runner_block_tables(
+                    num_seqs + graph_pad_size, block_table)
+                padding_0 = torch.zeros(graph_pad_size,
+                                        dtype=input_positions.dtype,
+                                        device=input_positions.device)
+                input_positions = torch.cat([input_positions, padding_0])
+
+            decode_metadata = AscendDecodeMetadata(
+                input_positions=input_positions,
+                block_table=block_table,
+                seq_lens=seq_lens,
+                seq_lens_list=seq_lens.tolist(),
+                max_seq_lens=max_seq_lens,
+                attn_mask=None)
+
+        attn_metadata = AscendTorchairMetadata(
+            decode=decode_metadata,
+            num_actual_tokens=num_actual_tokens,
+            block_tables=block_table,
+            query_start_loc=query_start_loc,
+            query_lens=query_lens,
+            seq_lens=seq_lens,
+            max_query_len=max_query_len,
+            slot_mapping=slot_mapping,
+            attn_mask=attn_mask,
+            attn_state=attn_state,
+            max_num_tokens_across_dp=max_num_tokens_across_dp,
+            with_prefill_across_dp=with_prefill_across_dp)
+        return attn_metadata
+
+
+class AscendAttentionTorchairBackendImpl(AttentionImpl):
+
+    def __init__(
+        self,
+        num_heads: int,
+        head_size: int,
+        scale: float,
+        num_kv_heads: int,
+        alibi_slopes: Optional[List[float]],
+        sliding_window: Optional[int],
+        kv_cache_dtype: str,
+        blocksparse_params: Optional[Dict[str, Any]] = None,
+        logits_soft_cap: Optional[float] = None,
+        attn_type: str = AttentionType.DECODER,
+        kv_sharing_target_layer_name: Optional[str] = None,
+        use_irope: bool = False,
+    ) -> None:
+        self.num_heads = num_heads
+        self.head_size = head_size
+        self.scale = float(scale)
+        self.num_kv_heads = num_heads if num_kv_heads is None else num_kv_heads
+        self.hidden_size = self.num_heads * self.head_size
+        self.kv_cache_dtype = kv_cache_dtype
+        self.sliding_window = sliding_window
+        if alibi_slopes is not None:
+            alibi_slopes = torch.tensor(alibi_slopes,
+                                        dtype=torch.float32,
+                                        device="npu")
+        self.alibi_slopes = alibi_slopes
+        self.attn_type = attn_type
+
+        assert self.num_heads % self.num_kv_heads == 0
+        self.num_queries_per_kv = self.num_heads // self.num_kv_heads
+        self.key_cache = None
+        self.value_cache = None
+
+    def forward(
+        self,
+        layer: AttentionLayer,
+        query: torch.Tensor,
+        key: torch.Tensor,
+        value: torch.Tensor,
+        kv_cache: torch.Tensor,
+        attn_metadata: AscendTorchairMetadata,
+        output: Optional[torch.Tensor] = None,
+        trace_flag: bool = False,
+    ) -> torch.Tensor:
+        """Forward pass with Ascend attention.
+        Args:
+            query: shape = [batch_size, seq_len, num_heads * head_size]
+            key: shape = [batch_size, seq_len, num_kv_heads * head_size]
+            value: shape = [batch_size, seq_len, num_kv_heads * head_size]
+            kv_cache: shape = [2, num_blocks, block_size,
+                               num_kv_heads, head_size]
+                      key_cache = [num_blocks, block_size,
+                                   num_kv_heads, head_size]
+                      value_cache = [num_blocks, block_size,
+                                     num_kv_heads, head_size]
+            attn_metadata: Metadata for attention.
+        Returns:
+            shape = [batch_size * seq_len, num_heads, head_size]
+        """
+        num_tokens = query.shape[0]
+        use_kv_cache_quant = kv_cache is not None and kv_cache[0].numel(
+        ) > 0 and kv_cache[0].dtype == torch.int8
+        if output is None:
+            output = torch.empty(num_tokens,
+                                 self.num_heads,
+                                 self.head_size,
+                                 dtype=query.dtype,
+                                 device=query.device)
+
+        if hasattr(layer, 'quant_method') and use_kv_cache_quant:
+            output = layer.quant_method.apply(layer, query, key, value,
+                                              kv_cache, attn_metadata,
+                                              self.attn_type, self.scale,
+                                              output)
+            return output.view(num_tokens, self.hidden_size)
+
+        if attn_metadata is None:
+            return output.view(num_tokens, self.hidden_size)
+
+        output = output.view(-1, self.num_heads, self.head_size)
+
+        assert layer._k_scale_float == 1.0 and layer._v_scale_float == 1.0
+        attn_type = self.attn_type
+        if attn_type != AttentionType.DECODER:
+            raise NotImplementedError("Encoder self-attention and "
+                                      "encoder/decoder cross-attention "
+                                      "are not implemented for "
+                                      "AscendAttentionTorchairBackendImpl")
+
+        if kv_cache is not None and kv_cache[0].numel() > 0:
+            key_cache, value_cache = kv_cache[0], kv_cache[1]
+            slots = attn_metadata.slot_mapping
+
+            block_size = key_cache.shape[1]
+            slots_indices = slots.reshape(-1, 1)
+            block_indices = slots_indices // block_size
+            slots_indices = slots_indices % block_size
+            indices = torch.cat((block_indices, slots_indices), dim=1)
+            torch_npu.npu_scatter_nd_update_(key_cache, indices, key)
+            torch_npu.npu_scatter_nd_update_(value_cache, indices, value)
+
+        if attn_metadata.attn_state == AscendAttentionState.PrefillNoCache:
+            assert attn_metadata is not None
+            assert attn_metadata.attn_mask is not None
+            mask = attn_metadata.attn_mask
+
+            # View q k v to BSH.
+            query = query.view(-1, self.num_heads, self.head_size)
+            key = key.view(-1, self.num_kv_heads, self.head_size)
+            value = value.view(-1, self.num_kv_heads, self.head_size)
+
+            if is_310p():
+                # align q k v output tensors
+                query = aligned_16(query)
+                key = aligned_16(key)
+                value = aligned_16(value)
+                output = aligned_16(output)
+
+                # do reformat in case of broadcasted tensors
+                mask = mask.repeat(attn_metadata.seq_lens.size(0), 1, 1, 1)
+                mask = torch_npu.npu_format_cast(mask.contiguous(),
+                                                 ACL_FORMAT_FRACTAL_NZ)
+
+            torch_npu._npu_flash_attention(query=query,
+                                           key=key,
+                                           value=value,
+                                           mask=mask,
+                                           seq_len=attn_metadata.seq_lens,
+                                           scale_value=self.scale,
+                                           num_heads=self.num_heads,
+                                           num_kv_heads=self.num_kv_heads,
+                                           out=output)
+            output = output[:num_tokens, :, :]
+        elif attn_metadata.attn_state == AscendAttentionState.PrefillCacheHit:
+            assert attn_metadata is not None
+            assert attn_metadata.attn_mask is not None
+            compress_mask = attn_metadata.attn_mask
+            torch_npu._npu_flash_attention_qlens(
+                query=query,
+                key_cache=self.key_cache,
+                value_cache=self.value_cache,
+                block_table=attn_metadata.block_tables,
+                mask=compress_mask,
+                seq_len=attn_metadata.query_lens,
+                context_lens=attn_metadata.seq_lens,
+                num_kv_heads=self.num_kv_heads,
+                num_heads=self.num_heads,
+                scale_value=self.scale,
+                out=output)
+        elif attn_metadata.attn_state == AscendAttentionState.DecodeOnly:
+            decode_meta = attn_metadata.decode
+            assert decode_meta is not None
+            seq_lens = decode_meta.seq_lens_list
+            block_table = decode_meta.block_table
+            block_size = key_cache.shape[1]
+            query = query.view(num_tokens, 1,
+                               self.num_heads * self.head_size).contiguous()
+            output = torch_npu.npu_incre_flash_attention(
+                query,
+                key_cache,
+                value_cache,
+                num_key_value_heads=self.num_kv_heads,
+                num_heads=self.num_heads,
+                actual_seq_lengths=seq_lens,
+                scale_value=self.scale,
+                block_table=block_table,
+                input_layout='BSH',
+                block_size=block_size)
+        else:
+            raise NotImplementedError(
+                "Torchair graph mode with non-MLA attention backend is still experimental."
+                "v1 scheduler(chunked prefill) is not supported at this moment. Please"
+                "setting 'ascend_scheduler_config':{'enabled':true} in additional_config"
+                "to use ascend scheduler.")
+
+        return output.view(num_tokens, self.hidden_size)

vllm_ascend/models/pangu_moe.py

@@ -20,6 +20,7 @@ from typing import Any, Dict, Iterable, List, Optional, Set, Tuple, Union
 import torch
 import torch.distributed as dist
 import torch.nn.functional as F
+import torch_npu
 from torch import nn
 from torch.nn import Parameter
 from transformers import PretrainedConfig
@@ -56,8 +57,9 @@ from vllm.model_executor.sampling_metadata import SamplingMetadata
 from vllm.model_executor.utils import set_weight_attrs
 from vllm.sequence import IntermediateTensors
 
+from vllm_ascend.ascend_config import get_ascend_config
 from vllm_ascend.distributed.parallel_state import get_ep_group
-from vllm_ascend.utils import is_310p
+from vllm_ascend.utils import ACL_FORMAT_FRACTAL_NZ, is_310p
 
 logger = init_logger(__name__)
 
@@ -498,8 +500,8 @@ class PanguProMoESparseMoeBlock(nn.Module):
         global _ROUTER_SCALE
         _ROUTER_SCALE = self.router_scale
         if not use_h2p():
-            final_hidden_states = self.experts(hidden_states=hidden_states,
+            final_hidden_states = self.experts.forward_impl(
-                                               router_logits=router_logits)
+                hidden_states=hidden_states, router_logits=router_logits)
         else:
             # TODO: when using h2p, we have to skip communication in vLLM
             # native FusedMoE. here we need to design a better FusedMoE
@@ -608,6 +610,9 @@ class PanguProMoEAttention(nn.Module):
             prefix=f"{prefix}.attn",
         )
 
+        ascend_config = get_ascend_config()
+        self.torchair_graph_enabled = ascend_config.torchair_graph_config.enabled
+
     def forward(
         self,
         positions: torch.Tensor,
@@ -618,7 +623,19 @@ class PanguProMoEAttention(nn.Module):
         qkv, _ = self.qkv_proj(hidden_states)
         q, k, v = qkv.split([self.q_size, self.kv_size, self.kv_size], dim=-1)
         q, k = self.rotary_emb(positions, q, k)
+        if self.torchair_graph_enabled:
+            forward_kwargs = {'trace_flag': False}
+            output_shape = q.shape
+            attn_output = torch.empty(output_shape,
+                                      dtype=q.dtype,
+                                      device=q.device)
+            forward_kwargs['output'] = attn_output
+            attn_output = self.attn.impl.forward(self.attn, q, k, v, kv_cache,
+                                                 attn_metadata,
+                                                 **forward_kwargs)
+        else:
             attn_output = self.attn(q, k, v)
+
         output, _ = self.o_proj(attn_output)
         return output
 
@@ -1097,4 +1114,10 @@ class PanguProMoEForCausalLM(nn.Module, SupportsPP):
                                             default_weight_loader)
                     weight_loader(param, loaded_weight)
             loaded_params.add(name)
+            if is_310p() and "head" in name:
+                # on 300I Duo platform, ACL_FORMAT_FRACTAL_NZ is much more preferred than
+                # ACL_FORMAT_FRACTAL_ND by matmul operation. Since lmhead is also implemented
+                # by linear, we manually cast the format here.
+                param.data = torch_npu.npu_format_cast(param.data,
+                                                       ACL_FORMAT_FRACTAL_NZ)
         return loaded_params

vllm_ascend/ops/rotary_embedding.py

@@ -22,6 +22,7 @@ import torch
 from vllm.model_executor.layers.rotary_embedding import (
     DeepseekScalingRotaryEmbedding, RotaryEmbedding)
 
+from vllm_ascend.ascend_config import get_ascend_config
 from vllm_ascend.utils import enable_custom_op, is_310p
 
 
@@ -38,6 +39,14 @@ def rope_forward_oot(
     offsets: Optional[torch.Tensor] = None,
     is_neox_style_override: Optional[bool] = None
 ) -> Tuple[torch.Tensor, torch.Tensor]:
+    if get_ascend_config().torchair_graph_config.enabled:
+        return self.forward_native(
+            positions,
+            query,
+            key,
+            offsets,
+        )
+
     import torch_npu
     query_shape, key_shape = query.shape, key.shape
     if self.cos_sin_cache.device != query.device:

vllm_ascend/patch/platform/patch_common/patch_distributed.py

@@ -132,19 +132,6 @@ def communication_adaptation_310p():
     torch.distributed.distributed_c10d.all_reduce = all_reduce_wrapper_310p(
         torch.distributed.distributed_c10d.all_reduce)
 
-    def reduce_scatter_310p(output_tensor, input_tensor, group=None):
-        rank = torch.distributed.get_rank(group)
-        world_size = torch.distributed.get_world_size(group)
-        torch.distributed.all_reduce(input_tensor,
-                                     torch.distributed.ReduceOp.SUM,
-                                     group,
-                                     async_op=False)
-        interval = input_tensor.shape[0] // world_size
-        output_tensor[:] = input_tensor[rank * interval:(rank + 1) * interval]
-
-    torch.distributed._reduce_scatter_base = reduce_scatter_310p
-    torch.distributed.distributed_c10d._reduce_scatter_base = reduce_scatter_310p
-
 
 if is_310p():
     communication_adaptation_310p()

vllm_ascend/platform.py

@@ -27,7 +27,8 @@ from torch.distributed.distributed_c10d import PrefixStore
 from vllm.logger import logger
 from vllm.platforms import Platform, PlatformEnum
 
-from vllm_ascend.ascend_config import check_ascend_config, init_ascend_config
+from vllm_ascend.ascend_config import (check_ascend_config, get_ascend_config,
+                                       init_ascend_config)
 from vllm_ascend.utils import (ASCEND_QUATIZATION_METHOD, is_310p,
                                update_aclgraph_sizes)
 
@@ -154,14 +155,6 @@ class NPUPlatform(Platform):
         else:
             enforce_eager = getattr(model_config, "enforce_eager", False)
 
-        if ascend_config.torchair_graph_config.enabled and envs.VLLM_MLA_DISABLE:
-            # torchair_graph is not supported for V1 without mla currently.
-            logger.warning(
-                "Torchair graph mode is still experimental and not supported for V1 without mla currently, "
-                "Fallback to eager mode.")
-            ascend_config.torchair_graph_config.enabled = False
-            enforce_eager = True
-
         check_ascend_config(vllm_config, enforce_eager)
 
         if enforce_eager or compilation_config.level == CompilationLevel.NO_COMPILATION:
@@ -229,6 +222,9 @@ class NPUPlatform(Platform):
                              kv_cache_dtype, block_size, use_v1, use_mla):
         if use_v1 and use_mla:
             return "vllm_ascend.attention.mla_v1.AscendMLABackend"
+        use_torchair = get_ascend_config().torchair_graph_config.enabled
+        if use_v1 and use_torchair:
+            return "vllm_ascend.attention.attention_v1_torchair.AscendAttentionTorchairBackend"
         if use_v1:
             return "vllm_ascend.attention.attention_v1.AscendAttentionBackend"
         if use_mla:

vllm_ascend/quantization/w8a8.py

@@ -406,9 +406,11 @@ class AscendC8KVCacheMethod:
                                       "implemented for "
                                       "PrefillCacheHit")
         elif attn_metadata.attn_state == AscendAttentionState.DecodeOnly:  # changed attn_metadata.attn_state == AscendAttentionState.DecodeOnly
+            if hasattr(attn_metadata, "decode"):
                 # torch_air
-            # decode_meta = attn_metadata.decode
+                decode_meta = attn_metadata.decode
-            # seq_lens = decode_meta.seq_lens_list
+                seq_lens = decode_meta.seq_lens_list
+            else:
                 seq_lens = attn_metadata.seq_lens
             block_size = key_cache.shape[1]
             query = query.view(num_tokens, 1, layer.num_heads *

vllm_ascend/worker/model_runner_v1.py

@@ -2049,9 +2049,19 @@ class NPUModelRunner(LoRAModelRunnerMixin):
         from torchair import patch_for_hcom  # type: ignore
 
         patch_for_hcom()
+
+        if is_310p():
+            # on 300I Duo platform, we need to patch broadcast. however, this patch will be
+            # overwritten by patch_for_hcom in torchair. so we need to re-patch it here.
+            from vllm_ascend.patch.platform.patch_common.patch_distributed import \
+                communication_adaptation_310p
+            communication_adaptation_310p()
+
         config = torchair.CompilerConfig()
         config.experimental_config.frozen_parameter = True
-        config.experimental_config.tiling_schedule_optimize = True
+        # enabling tiling_schedule_optimize on 300I Duo has some bugs, so we have to
+        # disable it on 300I Duo platform now.
+        config.experimental_config.tiling_schedule_optimize = not is_310p()
         config.experimental_config.enable_view_optimize = \
         get_ascend_config().torchair_graph_config.enable_view_optimize
         torch.npu.set_compile_mode(jit_compile=False)
@@ -2149,26 +2159,49 @@ class NPUModelRunner(LoRAModelRunnerMixin):
                             kv_cache_spec.num_kv_heads,
                             kv_cache_spec.head_size)
                     if self.torchair_graph_enabled:
+                        if len(kv_cache_shape) == 3:
+                            # for non MLA attention backend that use torchair, we consider to pass kv_cache layout
+                            # of BSH ([num_blocks, block_size, kv_head_dim * head_size]) to attention.
+
+                            kv_caches[layer_name] = (
+                                torch.zeros(kv_cache_shape,
+                                            dtype=self.kv_cache_dtype,
+                                            device=self.device),
+                                torch.zeros(kv_cache_shape,
+                                            dtype=self.kv_cache_dtype,
+                                            device=self.device))
+                            # atb reshape_and_cache does not support torchair.
+                            kv_caches[layer_name] = (
+                                torch_npu.npu_format_cast(
+                                    kv_caches[layer_name][0],
+                                    ACL_FORMAT_FRACTAL_ND),
+                                torch_npu.npu_format_cast(
+                                    kv_caches[layer_name][1],
+                                    ACL_FORMAT_FRACTAL_ND),
+                            )
+                        else:
+                            # for MLA attention backend that use torchair.
                             layer_kv_cache_nope = torch.zeros(
                                 kv_cache_shape[:-1] +
-                            (self.model_config.hf_text_config.kv_lora_rank, ),
+                                (self.model_config.hf_text_config.kv_lora_rank,
+                                 ),
                                 dtype=self.dtype,
                                 pin_memory=True,
                                 device=self.device)
                             layer_kv_cache_pe = torch.zeros(
                                 kv_cache_shape[:-1] +
-                            (self.model_config.hf_text_config.qk_rope_head_dim,
+                                (self.model_config.hf_text_config.
-                             ),
+                                 qk_rope_head_dim, ),
                                 dtype=self.dtype,
                                 pin_memory=True,
                                 device=self.device)
                             kv_caches[layer_name] = (layer_kv_cache_nope,
                                                      layer_kv_cache_pe)
                             kv_caches[layer_name] = (
-                            torch_npu.npu_format_cast(kv_caches[layer_name][0],
+                                torch_npu.npu_format_cast(
-                                                      acl_format),
+                                    kv_caches[layer_name][0], acl_format),
-                            torch_npu.npu_format_cast(kv_caches[layer_name][1],
+                                torch_npu.npu_format_cast(
-                                                      acl_format),
+                                    kv_caches[layer_name][1], acl_format),
                             )
                     else:
                         kv_caches[layer_name] = torch.zeros(