[BugFix] [ROCm]: Bugfix and handle addition case of input for `rocm_aiter_rms_norm` (#17857)

Signed-off-by: tjtanaa <tunjian.tan@embeddedllm.com>

tests/models/language/generation/test_common.py

@@ -28,6 +28,7 @@ AITER_MODEL_LIST = [
     "Qwen/Qwen-7B-Chat",
     "Qwen/Qwen2.5-0.5B-Instruct",
     "TitanML/tiny-mixtral",
+    "Qwen/Qwen3-8B",
 ]
 
 
@@ -78,6 +79,9 @@ AITER_MODEL_LIST = [
             "Qwen/Qwen2.5-0.5B-Instruct",  # qwen2
             marks=[pytest.mark.core_model],
         ),
+        pytest.param(
+            "Qwen/Qwen3-8B",  # qwen (text-only)
+        ),
         pytest.param("stabilityai/stablelm-3b-4e1t"),  # stablelm
         pytest.param("bigcode/starcoder2-3b"),  # starcoder2
         pytest.param(

vllm/model_executor/layers/layernorm.py

@@ -46,6 +46,12 @@ def rocm_aiter_rms_norm(x: torch.Tensor, weight: torch.Tensor,
                         variance_epsilon: float) -> torch.Tensor:
 
     import aiter as rocm_aiter
+    if x.dim() > 2:
+        x_original_shape = x.shape
+        x = x.reshape(-1, x_original_shape[-1])
+        x = rocm_aiter.rms_norm(x, weight, variance_epsilon)
+        return x.reshape(x_original_shape)
+
     return rocm_aiter.rms_norm(x, weight, variance_epsilon)
 
 
@@ -55,16 +61,17 @@ def rocm_aiter_fused_add_rms_norm(
 
     import aiter as rocm_aiter
 
-    # Assuming the correct signature for rmsnorm2d_fwd_with_add
+    residual_out = torch.empty_like(residual)
+    output = torch.empty_like(x)
     rocm_aiter.rmsnorm2d_fwd_with_add(
-        x,  # output
+        output,  # output
         x,  # input
         residual,  # residual input
-        residual,  # residual output
+        residual_out,  # residual output
         weight,
         variance_epsilon,
     )
-    return x, residual
+    return output, residual_out
 
 
 def dispatch_cuda_rmsnorm_func(add_residual: bool):