Attn MetaData dtype should be same as model dtype (HabanaAI#271)

Attn MetaData was hard coded to bfloat16, leading to a runtime error for
float32 model instantiation.

vllm/worker/habana_model_runner.py

@@ -238,11 +238,12 @@ def pad_list(list, k, v):
 
 class HpuModelAdapter():
 
-    def __init__(self, model, block_size, enforce_eager):
+    def __init__(self, model, block_size, dtype, enforce_eager):
         self.model = model
         self.prefill_use_fusedsdpa = os.getenv('VLLM_PROMPT_USE_FUSEDSDPA',
                                                '0').lower() in ['1', 'true']
         self.block_size = block_size
+        self.dtype = dtype
         if not htorch.utils.internal.is_lazy() and not enforce_eager:
             self.model = torch.compile(self.model,
                                        backend='hpu_backend',
@@ -304,7 +305,7 @@ def forward(self, *args, **kwargs):
         input_ids = kwargs['input_ids']
         kwargs['attn_metadata'] = self._update_metadata(
             kwargs['attn_metadata'], input_ids.size(0), input_ids.size(1),
-            input_ids.device, torch.bfloat16)
+            input_ids.device, self.dtype)
         LoraMask.setLoraMask(kwargs.pop('lora_mask'))
         hidden_states = self.model(*args, **kwargs)
         hidden_states = hidden_states.view(-1, hidden_states.shape[-1])
@@ -600,6 +601,7 @@ def load_model(self) -> None:
                 self.model = _maybe_wrap_in_hpu_graph(
                     self.model,
                     self.block_size,
+                    dtype=self.model_config.dtype,
                     enforce_eager=self.enforce_eager)
             msg = f"Wrapping in HPU Graph took {m_wrap.get_summary_string()}"
             logger.info(msg)