[KVConnector] Keep KVTransferParams as a dict (#18033)

vllm/v1/request.py

@@ -3,7 +3,6 @@
 import enum
 from typing import TYPE_CHECKING, Any, Optional, Union
 
-from vllm.distributed.kv_transfer.kv_connector.v1 import KVTransferParams
 from vllm.multimodal.inputs import MultiModalKwargs, PlaceholderRange
 from vllm.sampling_params import SamplingParams
 from vllm.utils import is_list_of
@@ -62,14 +61,10 @@ class Request:
         self.num_encoder_inputs = len(self.mm_inputs)
         self.has_encoder_inputs = self.num_encoder_inputs > 0
 
-        # P/D: KV transfer parameters (raw and parsed).
-        raw_params = (None if sampling_params.extra_args is None
-                      else sampling_params.extra_args.get(
-                          "kv_transfer_params", None))
-        self.raw_kv_transfer_params: Optional[dict[str, Any]] = raw_params
-        # Each connector parses the raw dictionary and sets this
-        # attr the first time that the request is processed.
-        self.kv_transfer_params: Optional[KVTransferParams] = None
+        # P/D: Connector-specific KV transfer parameters.
+        kv_params = (None if sampling_params.extra_args is None else
+                     sampling_params.extra_args.get("kv_transfer_params"))
+        self.kv_transfer_params: Optional[dict[str, Any]] = kv_params
 
         # Sanity check
         assert len(self.mm_inputs) == len(self.mm_positions)