[ROCm] Add attention sink to use_rocm_custom_paged_attention (#22329)

Signed-off-by: Woosuk Kwon <woosuk.kwon@berkeley.edu>
Co-authored-by: LiuXiaoxuanPKU <lilyliupku@gmail.com>
Co-authored-by: simon-mo <xmo@berkeley.edu>
Co-authored-by: Chen Zhang <zhangch99@outlook.com>
Co-authored-by: Hongxia Yang <62075498+hongxiayang@users.noreply.github.com>
Co-authored-by: Minseok Lee <47620120+minseokl@users.noreply.github.com>
Co-authored-by: Yongye Zhu <zyy1102000@gmail.com>

vllm/platforms/rocm.py

@@ -127,7 +127,8 @@ def use_rocm_custom_paged_attention(
         max_seq_len: int,
         sliding_window: int,
         kv_cache_dtype: str,
-        alibi_slopes: Optional[torch.Tensor] = None) -> bool:
+        alibi_slopes: Optional[torch.Tensor] = None,
+        sinks: Optional[torch.Tensor] = None) -> bool:
 
     GPU_ARCH = torch.cuda.get_device_properties("cuda").gcnArchName
     ON_GFX9 = any(arch in GPU_ARCH for arch in ["gfx90a", "gfx942", "gfx950"])
@@ -145,7 +146,7 @@ def use_rocm_custom_paged_attention(
                 and max_seq_len <= 128 * 1024
                 and (envs.VLLM_ROCM_CUSTOM_PAGED_ATTN)
                 and not (envs.VLLM_ROCM_USE_AITER_PAGED_ATTN
-                         and envs.VLLM_ROCM_USE_AITER))
+                         and envs.VLLM_ROCM_USE_AITER) and sinks is None)
 
     else:
         return (ON_GFX11_GFX12 and (not envs.VLLM_USE_V1 or sliding_window == 0
@@ -155,7 +156,7 @@ def use_rocm_custom_paged_attention(
                 and (gqa_ratio >= 3 and gqa_ratio <= 16)
                 and max_seq_len <= 128 * 1024 and alibi_slopes is None
                 and kv_cache_dtype == "auto"
-                and envs.VLLM_ROCM_CUSTOM_PAGED_ATTN)
+                and envs.VLLM_ROCM_CUSTOM_PAGED_ATTN and sinks is None)
 
 
 class RocmPlatform(Platform):
@@ -170,7 +171,7 @@ class RocmPlatform(Platform):
 
     supported_quantization: list[str] = [
         "awq", "gptq", "fp8", "compressed-tensors", "fbgemm_fp8", "gguf",
-        "quark", "ptpc_fp8"
+        "quark", "ptpc_fp8", "mxfp4"
     ]
 
     @classmethod