llama3.2 + cross attn test (#220)

* llama3.2 + cross attn test

* lint issues fix

* mypy errors

* making yapf happy

* cut off WA for tunned gemms

* try and catch for non continuous tensor

---------

Co-authored-by: Aleksandr Malyshev <[email protected]>

Author: maleksan85

tests/kernels/test_encoder_decoder_attn.py

@@ -21,7 +21,8 @@
 from vllm.utils import is_hip
 
 # List of support backends for encoder/decoder models
-LIST_ENC_DEC_SUPPORTED_BACKENDS = [_Backend.XFORMERS]
+LIST_ENC_DEC_SUPPORTED_BACKENDS = [_Backend.XFORMERS] if not is_hip() \
+                                            else [_Backend.ROCM_FLASH]
 
 HEAD_SIZES = [64, 256]
 
@@ -807,7 +808,6 @@ def test_encoder_only(
         assert_actual_matches_ideal(enc_test_params, enc_pckd_act_out)
 
 
-@pytest.mark.skipif(is_hip(), reason=STR_NOT_IMPL_ENC_DEC_ROCM_HIP)
 @pytest.mark.parametrize("num_heads", NUM_HEADS)
 @pytest.mark.parametrize("head_size", HEAD_SIZES)
 @pytest.mark.parametrize("attn_backend", LIST_ENC_DEC_SUPPORTED_BACKENDS)

tests/kernels/utils.py

@@ -12,8 +12,8 @@
 from torch._prims_common import TensorLikeType
 
 from vllm.attention import AttentionBackend, AttentionMetadata, AttentionType
-from vllm.utils import (STR_BACKEND_ENV_VAR, STR_XFORMERS_ATTN_VAL,
-                        make_tensor_with_pad)
+from vllm.utils import (STR_BACKEND_ENV_VAR, STR_ROCM_FLASH_ATTN_VAL,
+                        STR_XFORMERS_ATTN_VAL, make_tensor_with_pad)
 
 # For now, disable "test_aot_dispatch_dynamic" since there are some
 # bugs related to this test in PyTorch 2.4.
@@ -524,8 +524,13 @@ def make_backend(backend_name: str) -> AttentionBackend:
     if backend_name == STR_XFORMERS_ATTN_VAL:
         # NOTE: xFormers backend cannot be imported for CPU and AMD GPUs.
         from vllm.attention.backends.xformers import XFormersBackend
-
         return XFormersBackend()
+
+    if backend_name == STR_ROCM_FLASH_ATTN_VAL:
+        from vllm.attention.backends.rocm_flash_attn import (  # noqa: F401
+            ROCmFlashAttentionBackend)
+        return ROCmFlashAttentionBackend
+
     raise AssertionError(
         f"Unrecognized backend_name {backend_name} for unit test")