Add support to Mistral large 3 eagle with dense layers (#36163)

Signed-off-by: juliendenize <julien.denize@mistral.ai>
Signed-off-by: Julien Denize <40604584+juliendenize@users.noreply.github.com>
Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

vllm/model_executor/models/mistral_large_3_eagle.py

 # SPDX-License-Identifier: Apache-2.0
 # SPDX-FileCopyrightText: Copyright contributors to the vLLM project
 
+import copy
 from collections.abc import Iterable
 from functools import partial
 
@@ -33,7 +34,9 @@ class EagleMistralLarge3Model(DeepseekV2Model):
     ):
         nn.Module.__init__(self)
 
-        config = vllm_config.model_config.hf_config
+        config = copy.deepcopy(vllm_config.model_config.hf_config)
+        config.first_k_dense_replace += start_layer_id
+
         quant_config = vllm_config.quant_config
         self.config = config
         self.vllm_config = vllm_config
@@ -53,6 +56,7 @@ class EagleMistralLarge3Model(DeepseekV2Model):
                 DeepseekV2DecoderLayer(
                     vllm_config=vllm_config,
                     prefix=maybe_prefix(prefix, f"layers.{i + start_layer_id}"),
+                    config=config,
                 )
                 for i in range(self.config.num_hidden_layers)
             ]

vllm/transformers_utils/configs/mistral.py

@@ -19,6 +19,10 @@ def adapt_config_dict(
     if bool(config_dict.get("quantization")):
         config_dict = _remap_mistral_quantization_args(config_dict)
 
+    is_mla = bool(config_dict.get("qk_nope_head_dim"))
+    if is_mla:
+        config_dict = _remap_mistral_mla_args(config_dict)
+
     is_moe = bool(config_dict.get("moe"))
     is_mistral_large_3 = (
         is_moe and (config_dict["moe"].get("num_shared_experts") or 0) > 0
@@ -291,3 +295,22 @@ def _remap_moe_args(config: dict) -> dict:
     config["scoring_func"] = "softmax"
 
     return config
+
+
+def _remap_mistral_mla_args(config: dict) -> dict:
+    if not config.get("moe"):
+        moe = {
+            "num_experts": 1,
+            "first_k_dense_replace": config.get("num_hidden_layers"),
+            "route_every_n": 1,
+            "num_shared_experts": 1,
+            "expert_hidden_dim": config.get("intermediate_size"),
+            "num_experts_per_tok": 1,
+            "routed_scale": 1.0,
+            "renorm_strategy": "WEIGHTS",
+            "use_load_balancing_bias": False,
+            "num_expert_groups": 1,
+            "num_expert_groups_per_tok": 1,
+        }
+        config["moe"] = moe
+    return config