[qwen3 next ]add ascend c casual_conv1d_fn (#6661)

### What this PR does / why we need it?
add ascend c casual_conv1d_fn

- vLLM version: v0.15.0
- vLLM main:
13397841ab
---------
Signed-off-by: ZT-AIA <1028681969@qq.com>
Signed-off-by: ZT-AIA <63220130+ZT-AIA@users.noreply.github.com>
Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

csrc/causal_conv1d/tiling_base/tiling_key.h

@@ -0,0 +1,63 @@
+/**
+ * This program is free software, you can redistribute it and/or modify.
+ * Copyright (c) 2025 Huawei Technologies Co., Ltd.
+ * This file is a part of the CANN Open Software.
+ * Licensed under CANN Open Software License Agreement Version 2.0 (the "License").
+ * Please refer to the License for details. You may not use this file except in compliance with the License.
+ * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT, MERCHANTABILITY, OR FITNESS FOR A PARTICULAR PURPOSE.
+ * See LICENSE in the root of the software repository for the full text of the License.
+ */
+
+/*!
+ * \file tiling_key.h
+ * \brief
+ */
+
+#pragma once
+
+#include <cstdint>
+
+namespace Ops {
+namespace Transformer {
+namespace OpTiling {
+constexpr uint64_t RecursiveSum()
+{
+    return 0;
+}
+
+constexpr uint64_t kBase = 10; // Base-10 carry base
+template <typename T, typename... Args> constexpr uint64_t RecursiveSum(T templateId, Args... templateIds)
+{
+    return static_cast<uint64_t>(templateId) + kBase * RecursiveSum(templateIds...);
+}
+
+// TilingKey generation rules:
+// FlashAttentionScore/FlashAttentionScoreGrad assembles tiling key using decimal digits, containing the following key parameters from low to high: Ub0, Ub1,
+// Block, DataType, Format, Sparse. Specialized template Ub0, Ub1:
+//     Represents the axis for UB intra-core splitting, using AxisEnum. Since we allow at most two axes to be split, UB0 and UB1 exist. If there is no UB intra-core splitting,
+//     fill with AXIS_NONE. UB0 and UB1 each occupy one decimal digit;
+//     Block: Represents the axis used by UB for multi-core splitting, using AxisEnum, occupies one decimal digit;
+//     DataType: Represents the input/output data types supported by the current tiling key, using SupportedDtype enum, occupies one decimal digit
+//     Format: Represents the Format supported by the current tiling key, using InputLayout enum, occupies one decimal digit
+//     Sparse: Represents whether the current tiling key supports Sparse, using SparseCapability enum, occupies one decimal digit
+//     For other specialized scenarios, define your own bit fields and values
+// usage: get tilingKey from inputted types
+//     uint64_t tilingKey = GET_FLASHATTENTION_TILINGKEY(AxisEnum::AXIS_S1, AxisEnum::AXIS_S2, AxisEnum::AXIS_N2,
+//                                     SupportedDtype::FLOAT32, InputLayout::BSH, SparseCapability::SUPPORT_ALL)
+
+constexpr uint64_t TILINGKEYOFFSET = uint64_t(10000000000000000000UL); // 10^19
+template <typename... Args> constexpr uint64_t GET_TILINGKEY(Args... templateIds)
+{
+    return TILINGKEYOFFSET + RecursiveSum(templateIds...);
+}
+
+// usage: get tilingKey from inputted types
+//     uint64_t tilingKey = TILINGKEY(S2, S1, N2, FLOAT32, BSND, ALL)
+
+#define TILINGKEY(ub2, ub1, block, dtype, layout, sparse)                                                              \
+    (GET_TILINGKEY(AxisEnum::ub2, AxisEnum::ub1, AxisEnum::block, DtypeEnum::dtype, LayoutEnum::layout,                \
+                   SparseEnum::sparse))
+
+} // namespace Optiling
+} // namespace Transformer
+} // namespace Ops