[Model] Rename Phi3 rope scaling type (#5595)

vllm/config.py

@@ -1287,7 +1287,10 @@ def _get_and_verify_max_len(
         derived_max_model_len = default_max_len
 
     rope_scaling = getattr(hf_config, "rope_scaling", None)
-    if rope_scaling is not None and rope_scaling["type"] != "su":
+    # The correct one should be "longrope", kept "su" here
+    # to be backward compatible
+    if rope_scaling is not None and rope_scaling["type"] != "su" \
+        and rope_scaling["type"] != "longrope":
         if disable_sliding_window:
             # TODO(robertgshaw): Find a model that supports rope_scaling
             # with sliding window to see if this case should be allowed.

vllm/model_executor/layers/rotary_embedding.py

@@ -467,7 +467,7 @@ class YaRNScalingRotaryEmbedding(RotaryEmbedding):
         return cache
 
 
-class Phi3SuScaledRotaryEmbedding(nn.Module):
+class Phi3LongRoPEScaledRotaryEmbedding(nn.Module):
     """Phi3 family of models scaled rotary embedding.
 
     Based on the original RotaryEmbedding implementation.
@@ -491,11 +491,12 @@ class Phi3SuScaledRotaryEmbedding(nn.Module):
 
         if rotary_dim != head_size:
             raise ValueError(
-                f"`Phi3SuScaledRotaryEmbedding` does not support rotary_dim != \
-                    head_size ({rotary_dim}!={head_size}).")
+                f"`Phi3LongRoPEScaledRotaryEmbedding` does not support \
+                    rotary_dim != head_size ({rotary_dim}!={head_size}).")
         if is_neox_style is False:
             raise ValueError(
-                "`Phi3SuScaledRotaryEmbedding` only supports neox_style.")
+                "`Phi3LongRoPEScaledRotaryEmbedding` only supports neox_style."
+            )
 
         self.head_size = head_size
         self.max_position_embeddings = max_position_embeddings
@@ -608,7 +609,9 @@ def get_rope(
                                      is_neox_style, dtype)
     else:
         scaling_type = rope_scaling["type"]
-        if scaling_type != "su":
+        # The correct one should be "longrope" but keep "su" here
+        # for backward compatible
+        if scaling_type != "su" and scaling_type != "longrope":
             scaling_factor = rope_scaling["factor"]
         if scaling_type == "linear":
             rotary_emb = LinearScalingRotaryEmbedding(head_size, rotary_dim,
@@ -633,7 +636,9 @@ def get_rope(
                                                     base, is_neox_style,
                                                     scaling_factor, dtype,
                                                     **extra_kwargs)
-        elif scaling_type == "su":
+        # The correct one should be "longrope" but keep "su" here
+        # for backward compatible
+        elif scaling_type == "su" or scaling_type == "longrope":
             short_factor = rope_scaling["short_factor"]
             long_factor = rope_scaling["long_factor"]
             original_max_position = rope_scaling[
@@ -643,7 +648,7 @@ def get_rope(
                 for k, v in rope_scaling.items()
                 if k in ("short_mscale", "long_mscale")
             }
-            rotary_emb = Phi3SuScaledRotaryEmbedding(
+            rotary_emb = Phi3LongRoPEScaledRotaryEmbedding(
                 head_size, rotary_dim, max_position, original_max_position,
                 base, is_neox_style, dtype, short_factor, long_factor,
                 **extra_kwargs)