Support GlmMoeDsaForCausalLM (#18521)

Signed-off-by: Xinyuan Tong <xinyuantong.cs@gmail.com>
Signed-off-by: BBuf <1182563586@qq.com>
Co-authored-by: Xiaoyu Zhang <35585791+BBuf@users.noreply.github.com>
Co-authored-by: BBuf <1182563586@qq.com>

python/sglang/srt/configs/model_config.py

@@ -61,6 +61,7 @@ def is_deepseek_nsa(config: PretrainedConfig) -> bool:
             "DeepseekV3ForCausalLMNextN",
             "MistralLarge3ForCausalLM",
             "PixtralForConditionalGeneration",
+            "GlmMoeDsaForCausalLM",
         ]
         and getattr(config, "index_topk", None) is not None
     )
@@ -271,10 +272,10 @@ class ModelConfig:
     def _config_draft_model(self):
         is_draft_model = self.is_draft_model
 
-        if (
-            is_draft_model
-            and self.hf_config.architectures[0] == "DeepseekV3ForCausalLM"
-        ):
+        if is_draft_model and self.hf_config.architectures[0] in [
+            "DeepseekV3ForCausalLM",
+            "GlmMoeDsaForCausalLM",
+        ]:
             self.hf_config.architectures[0] = "DeepseekV3ForCausalLMNextN"
 
         if is_draft_model and self.hf_config.architectures[0] in [
@@ -411,7 +412,6 @@ class ModelConfig:
             "swa_v_head_dim",
             self.v_head_dim,
         )
-
         # FIXME: temporary special judge for MLA architecture
         if (
             "DeepseekV2ForCausalLM" in self.hf_config.architectures
@@ -419,6 +419,7 @@ class ModelConfig:
             or "DeepseekV3ForCausalLM" in self.hf_config.architectures
             or "DeepseekV3ForCausalLMNextN" in self.hf_config.architectures
             or "Glm4MoeLiteForCausalLM" in self.hf_config.architectures
+            or "GlmMoeDsaForCausalLM" in self.hf_config.architectures
             or "LongcatFlashForCausalLM" in self.hf_config.architectures
             or "LongcatFlashForCausalLMNextN" in self.hf_config.architectures
             or "DotsVLMForCausalLM" in self.hf_config.architectures

python/sglang/srt/models/glm4_moe.py

@@ -79,6 +79,7 @@ from sglang.srt.layers.vocab_parallel_embedding import (
 from sglang.srt.model_executor.cuda_graph_runner import get_is_capture_mode
 from sglang.srt.model_executor.forward_batch_info import ForwardBatch, PPProxyTensors
 from sglang.srt.model_loader.weight_utils import default_weight_loader
+from sglang.srt.models.deepseek_v2 import DeepseekV2ForCausalLM
 from sglang.srt.models.utils import apply_qk_norm
 from sglang.srt.server_args import get_global_server_args
 from sglang.srt.utils import (
@@ -1279,4 +1280,8 @@ class Glm4MoeForCausalLM(nn.Module):
             self.model.layers_to_capture = [val + 1 for val in layer_ids]
 
 
-EntryClass = [Glm4MoeForCausalLM]
+class GlmMoeDsaForCausalLM(DeepseekV2ForCausalLM):
+    pass
+
+
+EntryClass = [Glm4MoeForCausalLM, GlmMoeDsaForCausalLM]

python/sglang/srt/server_args.py

@@ -1194,9 +1194,15 @@ class ServerArgs:
             "KimiK25ForConditionalGeneration",
             "MistralLarge3ForCausalLM",
             "PixtralForConditionalGeneration",
+            "GlmMoeDsaForCausalLM",
         ]:
             # Set attention backend for DeepSeek
-            if is_deepseek_nsa(hf_config):  # DeepSeek 3.2
+            if is_deepseek_nsa(hf_config):  # DeepSeek 3.2, GlmMoeDsaForCausalLM
+                if model_arch == "GlmMoeDsaForCausalLM" and is_blackwell_supported():
+                    envs.SGLANG_NSA_FORCE_MLA.set(True)
+                    logger.warning(
+                        "Force NSA prefill to use MLA (i.e. disable MHA_ONE_SHOT) for GlmMoeDsaForCausalLM on SM100."
+                    )
                 if self.is_attention_backend_not_set():
                     self.attention_backend = "nsa"
                     logger.info("Use nsa attention backend for DeepSeek with DSA.")
@@ -2323,6 +2329,7 @@ class ServerArgs:
                 "DeepseekV3ForCausalLM",
                 "Glm4MoeForCausalLM",
                 "Glm4MoeLiteForCausalLM",
+                "GlmMoeDsaForCausalLM",
                 "BailingMoeForCausalLM",
                 "BailingMoeV2ForCausalLM",
                 "MistralLarge3ForCausalLM",
@@ -2652,6 +2659,7 @@ class ServerArgs:
                         "DeepseekV32ForCausalLM",
                         "MistralLarge3ForCausalLM",
                         "PixtralForConditionalGeneration",
+                        "GlmMoeDsaForCausalLM",
                     ]
                 except Exception:
                     pass
@@ -5648,6 +5656,7 @@ def auto_choose_speculative_params(self: ServerArgs):
         "GptOssForCausalLM",
         "Glm4MoeForCausalLM",
         "Glm4MoeLiteForCausalLM",
+        "GlmMoeDsaForCausalLM",
         "BailingMoeForCausalLM",
         "BailingMoeV2ForCausalLM",
         "MistralLarge3ForCausalLM",