[Feature, Hardware] Enable DeepseekV3 on AMD GPUs (#2601)

Co-authored-by: root <root@banff-cyxtera-s83-5.amd.com>
Co-authored-by: HAI <hixiao@gmail.com>
Co-authored-by: Bruce Xue <yigex@xilinx.com>
Co-authored-by: Yineng Zhang <me@zhyncs.com>

python/sglang/srt/layers/attention/triton_ops/decode_attention.py

@@ -406,6 +406,10 @@ def _decode_grouped_att_m_fwd(
     Lk = k_buffer.shape[-1]
     Lv = v_buffer.shape[-1]
 
+    # [TODO] work around shmem limit on MI3xx
+    if is_hip_ and Lk >= 576:
+        BLOCK = 16
+
     if Lk == 576:
         BLOCK_DMODEL = 512
         BLOCK_DPE = 64

python/sglang/srt/layers/moe/fused_moe_triton/fused_moe.py

@@ -477,9 +477,9 @@ def invoke_fused_moe_kernel(
 
     padded_size = 0
     if use_fp8_w8a8:
-        padded_size = padding_size
         assert B_scale is not None
         if block_shape is None:
+            padded_size = padding_size
             A, A_scale = ops.scaled_fp8_quant(A, A_scale)
         else:
             assert len(block_shape) == 2
@@ -614,7 +614,7 @@ def get_default_config(
                 "BLOCK_SIZE_K": 128,
                 "GROUP_SIZE_M": 32,
                 "num_warps": 8,
-                "num_stages": 4,
+                "num_stages": 2 if is_hip_flag else 4,
             }
             if M <= E:
                 config = {
@@ -623,7 +623,7 @@ def get_default_config(
                     "BLOCK_SIZE_K": 128,
                     "GROUP_SIZE_M": 1,
                     "num_warps": 4,
-                    "num_stages": 4,
+                    "num_stages": 2 if is_hip_flag else 4,
                 }
         else:
             # Block-wise quant: BLOCK_SIZE_K must be divisable by block_shape[1]
@@ -633,7 +633,7 @@ def get_default_config(
                 "BLOCK_SIZE_K": block_shape[1],
                 "GROUP_SIZE_M": 32,
                 "num_warps": 4,
-                "num_stages": 3,
+                "num_stages": 2 if is_hip_flag else 3,
             }
     else:
         config = {
@@ -878,7 +878,7 @@ def fused_experts_impl(
     block_shape: Optional[List[int]] = None,
 ):
     padded_size = padding_size
-    if not use_fp8_w8a8:
+    if not use_fp8_w8a8 or block_shape is not None:
         padded_size = 0
 
     # Check constraints.