【fix】ops gatingtopk fix nightly ci error (#4340)

### What this PR does / why we need it?
This pr https://github.com/vllm-project/vllm-ascend/pull/2958 is
supporting gatingtopk operator generalization, but caused nightly ci
error.
Now we add check logits for ops gatingtopk, and fix nightly ci.

- vLLM version: v0.12.0

Signed-off-by: 1092626063 <1092626063@qq.com>

tests/e2e/nightly/ops/test_fused_moe.py

@@ -28,7 +28,8 @@ import torch
 import torch_npu
 from vllm.model_executor.layers.activation import SiluAndMul
 
-from vllm_ascend.ops.fused_moe.experts_selector import select_experts
+from vllm_ascend.ops.fused_moe.experts_selector import (
+    check_npu_moe_gating_top_k, select_experts)
 from vllm_ascend.ops.fused_moe.moe_mlp import unified_apply_mlp
 from vllm_ascend.ops.fused_moe.token_dispatcher import \
     TokenDispatcherWithAllGather
@@ -303,7 +304,10 @@ def test_select_experts(
             e_score_correction_bias=e_score_correction_bias,
         )
 
-        if use_grouped_topk:
+        call_moe_gatingtopk = check_npu_moe_gating_top_k(
+            hidden_states, topk, topk_group, num_expert_group, scoring_func,
+            custom_routing_function)
+        if not call_moe_gatingtopk and use_grouped_topk:
             mock_native_grouped_topk.assert_called_once()
         else:
             mock_native_grouped_topk.assert_not_called()

tests/ut/quantization/test_w8a8.py

@@ -823,8 +823,7 @@ class TestSelectExperts(TestBase):
                            top_k=self.top_k,
                            use_grouped_topk=False,
                            renormalize=False,
-                           scoring_func="invalid_func",
-                           custom_routing_function=self.mock_custom_routing)
+                           scoring_func="invalid_func")
 
     @patch('torch.topk')
     def test_grouped_topk(self, mock_topk):
@@ -834,15 +833,13 @@ class TestSelectExperts(TestBase):
                                               self.top_k,
                                               dtype=torch.long))
 
-        weights, ids = select_experts(
-            hidden_states=self.hidden_states,
-            router_logits=self.router_logits,
-            top_k=self.top_k,
-            use_grouped_topk=True,
-            renormalize=False,
-            topk_group=4,
-            num_expert_group=2,
-            custom_routing_function=self.mock_custom_routing)
+        weights, ids = select_experts(hidden_states=self.hidden_states,
+                                      router_logits=self.router_logits,
+                                      top_k=self.top_k,
+                                      use_grouped_topk=True,
+                                      renormalize=False,
+                                      topk_group=4,
+                                      num_expert_group=2)
 
         mock_topk.assert_called()
         self.assertEqual(weights.shape, (self.num_tokens, self.top_k))
@@ -864,8 +861,7 @@ class TestSelectExperts(TestBase):
             renormalize=False,
             topk_group=4,
             num_expert_group=2,
-            e_score_correction_bias=e_score_correction_bias,
-            custom_routing_function=self.mock_custom_routing)
+            e_score_correction_bias=e_score_correction_bias)
 
         mock_grouped_topk.assert_called_once()
         self.assertEqual(weights.shape, (self.num_tokens, self.top_k))

vllm_ascend/ops/fused_moe/experts_selector.py

@@ -60,7 +60,15 @@ def select_experts(hidden_states: torch.Tensor,
     if weight_prefetch_method:
         weight_prefetch_method.maybe_prefetch_moe_weight_preprocess(
             hidden_states, "gate_up")
-    if custom_routing_function is None:
+    is_support_npu_moe_gating_top_k = check_npu_moe_gating_top_k(
+        hidden_states=hidden_states,
+        top_k=top_k,
+        topk_group=topk_group,
+        num_expert_group=num_expert_group,
+        scoring_func=scoring_func,
+        custom_routing_function=custom_routing_function)
+
+    if is_support_npu_moe_gating_top_k:
         topk_weights, topk_ids = _select_experts_with_fusion_ops(
             hidden_states=hidden_states,
             router_logits=router_logits,
@@ -90,6 +98,32 @@ def select_experts(hidden_states: torch.Tensor,
     return topk_weights, topk_ids
 
 
+def check_npu_moe_gating_top_k(
+        hidden_states: torch.Tensor,
+        top_k: int,
+        topk_group: Optional[int] = None,
+        num_expert_group: Optional[int] = None,
+        scoring_func: str = "softmax",
+        custom_routing_function: Optional[Callable] = None):
+    if custom_routing_function is not None:
+        return False
+    if scoring_func != "softmax" and scoring_func != "sigmoid":
+        return False
+    topk_group = topk_group if topk_group is not None else 1
+    num_expert_group = num_expert_group if num_expert_group is not None else 1
+    if not (num_expert_group > 0 and hidden_states.shape[-1] % num_expert_group
+            == 0 and hidden_states.shape[-1] // num_expert_group > 2):
+        return False
+    if topk_group < 1 or topk_group > num_expert_group:
+        return False
+    if top_k < 1 or \
+        top_k > (hidden_states.shape[-1] / (num_expert_group * topk_group)):
+        return False
+    if topk_group * hidden_states.shape[-1] / num_expert_group < top_k:
+        return False
+    return True
+
+
 def _native_grouped_topk(
     topk_weights: torch.Tensor,
     num_expert_group: Optional[int],
@@ -172,12 +206,9 @@ def _select_experts_with_fusion_ops(
         routed_scaling_factor=1.0,
         global_num_experts: int = -1):
 
-    if scoring_func == "softmax":
-        norm_type = 0
-        topk_group = 1
-        num_expert_group = 1
-    else:
-        norm_type = 1
+    topk_group = topk_group if topk_group is not None else 1
+    num_expert_group = num_expert_group if num_expert_group is not None else 1
+    norm_type = 0 if scoring_func == "softmax" else 1
     if e_score_correction_bias is not None and \
         e_score_correction_bias.dtype != router_logits.dtype:
         e_score_correction_bias = e_score_correction_bias.to(