introducing ck_tile! (#1216)

* enable gfx940

* switch between intrinsic mfma routines on mi100/200 and mi300

* fix mfma_int8 on MI300

* disable 2 int8 examples on MI300

* Update cmake-ck-dev.sh

* restore gitignore file

* modify Jenkinsfile to the internal repo

* Bump rocm-docs-core from 0.24.0 to 0.29.0 in /docs/sphinx

Bumps [rocm-docs-core](https://github.com/RadeonOpenCompute/rocm-docs-core) from 0.24.0 to 0.29.0.
- [Release notes](https://github.com/RadeonOpenCompute/rocm-docs-core/releases)
- [Changelog](https://github.com/RadeonOpenCompute/rocm-docs-core/blob/develop/CHANGELOG.md)
- [Commits](https://github.com/RadeonOpenCompute/rocm-docs-core/compare/v0.24.0...v0.29.0

)

---
updated-dependencies:
- dependency-name: rocm-docs-core
  dependency-type: direct:production
  update-type: version-update:semver-minor
...
Signed-off-by: dependabot[bot] <support@github.com>

* initial enablement of gfx950

* fix clang format

* disable examples 31 and 41 int8 on gfx950

* add code

* fix build wip

* fix xx

* now can build

* naming

* minor fix

* wip fix

* fix macro for exp2; fix warpgemm a/b in transposedC

* unify as tuple_array

* Update the required Python version to 3.9

* Update executable name in test scripts

* re-structure tuple/array to avoid spill

* Merge function templates

* Fix format

* Add constraint to array<> ctor

* Re-use function

* Some minor changes

* remove wrong code in store_raw()

* fix compile issue in transpose

* Rename enum
Rename 'cood_transform_enum' to 'coord_transform_enum'

* let more integral_constant->constant, and formating

* make sure thread_buffer can be tuple/array

* temp fix buffer_store spill

* not using custom data type by default, now we can have ISA-level same code as opt_padding

* fix compile error, fp8 not ready now

* fix fp8 duplicated move/shift/and/or problem

* Default use CK_TILE_FLOAT_TO_FP8_STOCHASTIC rounding mode

* fix scratch in fp8 kernel

* update some readme

* fix merge from upstream

* sync with upstream

* sync upstream again

* sync 22

* remove unused

* fix clang-format

* update README of ck_tile example

* fix several issue

* let python version to be 3.8 as minimal

* remove ck_tile example from default cmake target like all/install/check

* remove mistake

* 1).support receipe in generate.py 2).use simplified mask type 3).change left/right to pass into karg

* fix some bug in group-mode masking and codegen. update README

* F8 quantization for FMHA forward (#1224)

* Add SAccElementFunction, PComputeElementFunction, OAccElementFunction in pipeline

* Add element function to fmha api

* Adjust P elementwise function

* Fix bug of elementwise op, our elementwise op is not inout

* Add some elementwise op, prepare to quantization

* Let generate.py can generate different elementwise function

* To prevent compiler issue, remove the elementwise function we have not used.

* Remove f8 pipeline, we should share the same pipeline even in f8

* Remove remove_cvref_t

* Avoid warning

* Fix wrong fp8 QK/KV block gemm setting

* Check fp8 rounding error in check_err()

* Set fp8 rounding error for check_err()

* Use CK_TILE_FLOAT_TO_FP8_STANDARD as default fp8 rounding mode

* 1. codgen the f8 api and kernel
2. f8 host code

* prevent warning in filter mode

* Remove not-in-use elementwise function kargs

* Remove more not-in-use elementwise function kargs

* Small refinements in C++ source files

* Use conditional_t<> to simplify code

* Support heterogeneous argument for binary function types

* Re-use already-existing scales<> functor template

* Fix wrong value produced by saturating

* Generalize the composes<> template

* Unify saturates<> implementation

* Fix type errors in composes<>

* Extend less_equal<>

* Reuse the existing template less_equal<> in check_err()

* Add equal<float> & equal<double>

* Rename check_err() parameter

* Rename check_err() parameter

* Add FIXME comment for adding new macro in future

* Remove unnecessary cast to void

* Eliminate duplicated code

* Avoid dividing api pool into more than 2 groups

* Use more clear variable names

* Use affirmative condition in if stmt

* Remove blank lines

* Donot perfect forwarding in composes<>

* To fix compile error, revert generate.py back to 4439cc107dd90302d68a6494bdd33113318709f8

* Fix bug of p element function

* Add compute element op to host softmax

* Remove element function in api interface

* Extract user parameter

* Rename pscale and oscale variable

* rename f8 to fp8

* rename more f8 to fp8

* Add pipeline::operator() without element_functor

* 1. Remove deprecated pipeline enum
2. Refine host code parameter

* Use quantization range as input

* 1. Rename max_dtype to dtype_max.
2. Rename scale to scale_s
3.Add init description

* Refine description

* prevent early return

* unify _squant kernel name in cpp, update README

* Adjust the default range.

* Refine error message and bias range

* Add fp8 benchmark and smoke test

* fix fp8 swizzle_factor=4 case

---------
Co-authored-by: Po Yen Chen <PoYen.Chen@amd.com>
Co-authored-by: carlushuang <carlus.huang@amd.com>

---------
Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: illsilin <Illia.Silin@amd.com>
Co-authored-by: Illia Silin <98187287+illsilin@users.noreply.github.com>
Co-authored-by: Jing Zhang <jizha@amd.com>
Co-authored-by: zjing14 <zhangjing14@gmail.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Po-Yen, Chen <PoYen.Chen@amd.com>
Co-authored-by: rocking <ChunYu.Lai@amd.com>

include/ck_tile/host/reference/reference_batched_elementwise.hpp

+// SPDX-License-Identifier: MIT
+// Copyright (c) 2018-2023, Advanced Micro Devices, Inc. All rights reserved.
+
+#pragma once
+
+#include "ck_tile/core.hpp"
+#include "ck_tile/host/host_tensor.hpp"
+#include <thread>
+
+namespace ck_tile {
+
+template <typename ADataType,
+          typename BDataType,
+          typename AccDataType,
+          typename CDataType,
+          typename AElementOp      = ck_tile::identity,
+          typename BElementOp      = ck_tile::identity,
+          typename BinaryElementOp = ck_tile::plus<AccDataType>>
+CK_TILE_HOST void reference_batched_elementwise(const HostTensor<ADataType>& a_b_m_n,
+                                                const HostTensor<BDataType>& b_b_m_n,
+                                                HostTensor<CDataType>& c_b_m_n,
+                                                const AElementOp& a_element_op           = {},
+                                                const BElementOp& b_element_op           = {},
+                                                const BinaryElementOp& binary_element_op = {})
+{
+    const ck_tile::index_t N = c_b_m_n.mDesc.get_lengths()[2];
+
+    const bool broadcast_a_dim_b = (a_b_m_n.get_lengths()[0] == 1);
+    const bool broadcast_a_dim_m = (a_b_m_n.get_lengths()[1] == 1);
+    const bool broadcast_a_dim_n = (a_b_m_n.get_lengths()[2] == 1);
+
+    const bool broadcast_b_dim_b = (b_b_m_n.get_lengths()[0] == 1);
+    const bool broadcast_b_dim_m = (b_b_m_n.get_lengths()[1] == 1);
+    const bool broadcast_b_dim_n = (b_b_m_n.get_lengths()[2] == 1);
+
+    auto f = [&](auto batch, auto m) {
+        for(ck_tile::index_t n = 0; n < N; ++n)
+        {
+            AccDataType v_a{};
+            {
+                ck_tile::index_t i_b = (broadcast_a_dim_b ? 0 : batch);
+                ck_tile::index_t i_m = (broadcast_a_dim_m ? 0 : m);
+                ck_tile::index_t i_n = (broadcast_a_dim_n ? 0 : n);
+
+                v_a = ck_tile::type_convert<AccDataType>(a_element_op(a_b_m_n(i_b, i_m, i_n)));
+            }
+
+            AccDataType v_b{};
+            {
+                ck_tile::index_t i_b = (broadcast_b_dim_b ? 0 : batch);
+                ck_tile::index_t i_m = (broadcast_b_dim_m ? 0 : m);
+                ck_tile::index_t i_n = (broadcast_b_dim_n ? 0 : n);
+
+                v_b = ck_tile::type_convert<AccDataType>(b_element_op(b_b_m_n(i_b, i_m, i_n)));
+            }
+
+            c_b_m_n(batch, m, n) = ck_tile::type_convert<CDataType>(binary_element_op(v_a, v_b));
+        }
+    };
+
+    make_ParallelTensorFunctor(f, c_b_m_n.mDesc.get_lengths()[0], c_b_m_n.mDesc.get_lengths()[1])(
+        std::thread::hardware_concurrency());
+}
+} // namespace ck_tile

include/ck_tile/host/reference/reference_batched_gemm.hpp

+// SPDX-License-Identifier: MIT
+// Copyright (c) 2018-2023, Advanced Micro Devices, Inc. All rights reserved.
+
+#pragma once
+
+#include "ck_tile/core.hpp"
+#include "ck_tile/host/host_tensor.hpp"
+#include <thread>
+
+namespace ck_tile {
+
+template <typename ADataType,
+          typename BDataType,
+          typename AccDataType,
+          typename CDataType,
+          typename AElementOp   = ck_tile::identity,
+          typename BElementOp   = ck_tile::identity,
+          typename ACCElementOp = ck_tile::identity>
+CK_TILE_HOST void reference_batched_gemm(const HostTensor<ADataType>& a_b_m_k,
+                                         const HostTensor<BDataType>& b_b_n_k,
+                                         HostTensor<CDataType>& c_b_m_n,
+                                         const AElementOp& a_element_op     = {},
+                                         const BElementOp& b_element_op     = {},
+                                         const ACCElementOp& acc_element_op = {})
+{
+    const int N = b_b_n_k.mDesc.get_lengths()[1];
+    const int K = b_b_n_k.mDesc.get_lengths()[2];
+
+    auto f = [&](auto batch, auto m) {
+        for(int n = 0; n < N; ++n)
+        {
+            AccDataType v_acc = 0;
+
+            for(int k = 0; k < K; ++k)
+            {
+                ADataType v_a = a_element_op(a_b_m_k(batch, m, k));
+                BDataType v_b = b_element_op(b_b_n_k(batch, n, k));
+
+                v_acc += ck_tile::type_convert<AccDataType>(v_a) *
+                         ck_tile::type_convert<AccDataType>(v_b);
+            }
+
+            c_b_m_n(batch, m, n) = ck_tile::type_convert<CDataType>(acc_element_op(v_acc));
+        }
+    };
+
+    make_ParallelTensorFunctor(f, c_b_m_n.mDesc.get_lengths()[0], c_b_m_n.mDesc.get_lengths()[1])(
+        std::thread::hardware_concurrency());
+}
+} // namespace ck_tile

include/ck_tile/host/reference/reference_batched_masking.hpp

+// SPDX-License-Identifier: MIT
+// Copyright (c) 2018-2023, Advanced Micro Devices, Inc. All rights reserved.
+
+#pragma once
+
+#include "ck_tile/core.hpp"
+#include "ck_tile/host/host_tensor.hpp"
+#include <thread>
+
+namespace ck_tile {
+
+template <typename CDataType, typename MaskingType>
+CK_TILE_HOST void reference_batched_masking(HostTensor<CDataType>& c_b_m_n, const MaskingType& mask)
+{
+    const int M = c_b_m_n.mDesc.get_lengths()[1];
+    const int N = c_b_m_n.mDesc.get_lengths()[2];
+
+    auto f = [&](auto batch) {
+        for(int n = 0; n < N; ++n)
+        {
+            for(int m = 0; m < M; ++m)
+            {
+                if(mask.IsOutOfBound(m, n))
+                    c_b_m_n(batch, m, n) = -ck_tile::numeric<CDataType>::infinity();
+            }
+        }
+    };
+
+    make_ParallelTensorFunctor(f,
+                               c_b_m_n.mDesc.get_lengths()[0])(std::thread::hardware_concurrency());
+}
+} // namespace ck_tile

include/ck_tile/host/reference/reference_batched_softmax.hpp

+// SPDX-License-Identifier: MIT
+// Copyright (c) 2018-2023, Advanced Micro Devices, Inc. All rights reserved.
+
+#pragma once
+
+#include "ck_tile/core.hpp"
+#include "ck_tile/host/host_tensor.hpp"
+#include <thread>
+
+namespace ck_tile {
+
+template <typename ADataType,
+          typename CompDataType,
+          typename BDataType,
+          typename CompElementOp = ck_tile::identity>
+CK_TILE_HOST void reference_batched_softmax(
+    const HostTensor<ADataType>& a_b_m_n,
+    HostTensor<BDataType>& b_b_m_n,
+    const CompElementOp& comp_element_op                                    = {},
+    std::optional<std::reference_wrapper<HostTensor<CompDataType>>> lse_b_m = std::nullopt)
+{
+    const int N = a_b_m_n.mDesc.get_lengths()[2];
+
+    auto f = [&](auto batch, auto m) {
+        CompDataType v_max = -ck_tile::numeric<CompDataType>::infinity();
+
+        // max
+        for(int n = 0; n < N; ++n)
+        {
+            const CompDataType v_a = ck_tile::type_convert<CompDataType>(a_b_m_n(batch, m, n));
+
+            v_max = v_max < v_a ? v_a : v_max;
+        }
+
+        CompDataType v_exp_sum = 0;
+        // validate v_max if all the elements within a row are -INF
+        if(std::isinf(v_max) && v_max < 0)
+        {
+            v_max = ck_tile::type_convert<CompDataType>(0.f);
+        }
+
+        // sum
+        for(int n = 0; n < N; ++n)
+        {
+            const CompDataType v_a = ck_tile::type_convert<CompDataType>(a_b_m_n(batch, m, n));
+
+            v_exp_sum += ck_tile::exp(v_a - v_max);
+        }
+
+        // if sum is zero(masked), or nan/inf(other computation error), don't do divide
+        CompDataType inv_sum = (v_exp_sum == 0.f ? 1.f : 1.f / v_exp_sum);
+
+        // elementwise
+        for(int n = 0; n < N; ++n)
+        {
+            const CompDataType v_a = ck_tile::type_convert<CompDataType>(a_b_m_n(batch, m, n));
+            const CompDataType v_b = ck_tile::exp(v_a - v_max) * inv_sum;
+
+            b_b_m_n(batch, m, n) = ck_tile::type_convert<BDataType>(comp_element_op(v_b));
+        }
+        // lse
+        if(lse_b_m)
+        {
+            lse_b_m->get()(batch, m) = v_max + ck_tile::log(v_exp_sum);
+        }
+    };
+
+    make_ParallelTensorFunctor(f, b_b_m_n.mDesc.get_lengths()[0], b_b_m_n.mDesc.get_lengths()[1])(
+        std::thread::hardware_concurrency());
+}
+} // namespace ck_tile

include/ck_tile/host/reference/reference_gemm.hpp

+// SPDX-License-Identifier: MIT
+// Copyright (c) 2018-2023, Advanced Micro Devices, Inc. All rights reserved.
+
+#pragma once
+
+#include "ck_tile/core.hpp"
+#include "ck_tile/host/host_tensor.hpp"
+#include <thread>
+
+namespace ck_tile {
+
+template <typename ADataType,
+          typename BDataType,
+          typename AccDataType,
+          typename CDataType,
+          typename AElementOp   = ck_tile::identity,
+          typename BElementOp   = ck_tile::identity,
+          typename ACCElementOp = ck_tile::identity>
+CK_TILE_HOST void reference_gemm(const HostTensor<ADataType>& a_m_k,
+                                 const HostTensor<BDataType>& b_n_k,
+                                 HostTensor<CDataType>& c_m_n,
+                                 const AElementOp& a_element_op     = {},
+                                 const BElementOp& b_element_op     = {},
+                                 const ACCElementOp& acc_element_op = {})
+{
+    const int N = b_n_k.mDesc.get_lengths()[0];
+    const int K = b_n_k.mDesc.get_lengths()[1];
+
+    auto f = [&](auto m) {
+        for(int n = 0; n < N; ++n)
+        {
+            AccDataType v_acc = 0;
+
+            for(int k = 0; k < K; ++k)
+            {
+                ADataType v_a = a_element_op(a_m_k(m, k));
+                BDataType v_b = b_element_op(b_n_k(n, k));
+
+                v_acc += ck_tile::type_convert<AccDataType>(v_a) *
+                         ck_tile::type_convert<AccDataType>(v_b);
+            }
+
+            c_m_n(m, n) = ck_tile::type_convert<CDataType>(acc_element_op(v_acc));
+        }
+    };
+
+    make_ParallelTensorFunctor(f,
+                               c_m_n.mDesc.get_lengths()[0])(std::thread::hardware_concurrency());
+}
+} // namespace ck_tile

include/ck_tile/host/reference/reference_im2col.hpp

+// SPDX-License-Identifier: MIT
+// Copyright (c) 2018-2023, Advanced Micro Devices, Inc. All rights reserved.
+
+#pragma once
+
+#include "ck_tile/core.hpp"
+#include "ck_tile/host/host_tensor.hpp"
+#include <thread>
+
+namespace ck_tile {
+
+template <typename T>
+CK_TILE_HOST void reference_im2col(HostTensor<T>& in_mtx_host_ref,
+                                   const HostTensor<T>& in_host,
+                                   int /*N*/,
+                                   int /*K*/,
+                                   int C,
+                                   int /*Y*/,
+                                   int X,
+                                   int Hi,
+                                   int Wi,
+                                   int Ho,
+                                   int Wo,
+                                   int ConvStrideH,
+                                   int ConvStrideW,
+                                   int ConvDilationH,
+                                   int ConvDilationW,
+                                   int InLeftPadH,
+                                   int InLeftPadW,
+                                   int /*InRightPadH*/,
+                                   int /*InRightPadW*/)
+{
+    int GemmM = in_mtx_host_ref.get_lengths()[0];
+    int GemmK = in_mtx_host_ref.get_lengths()[1];
+
+    for(int gemm_m = 0; gemm_m < GemmM; ++gemm_m)
+    {
+        int mtmp = gemm_m;
+        int n    = mtmp / (Ho * Wo);
+        mtmp -= n * Ho * Wo;
+        int ho = mtmp / Wo;
+        int wo = mtmp - ho * Wo;
+
+        for(int gemm_k = 0; gemm_k < GemmK; ++gemm_k)
+        {
+            int ktmp = gemm_k;
+            int y    = ktmp / (X * C);
+            ktmp -= y * X * C;
+            int x = ktmp / C;
+            int c = ktmp - x * C;
+
+            int hi = y * ConvDilationH + ho * ConvStrideH - InLeftPadH;
+            int wi = x * ConvDilationW + wo * ConvStrideW - InLeftPadW;
+
+            bool inbound = (hi >= 0 && hi < Hi && wi >= 0 && wi < Wi);
+
+            in_mtx_host_ref(gemm_m, gemm_k) = inbound ? in_host(n, hi, wi, c) : 0;
+        }
+    }
+}
+} // namespace ck_tile

include/ck_tile/host/reference/reference_reduce.hpp

+// SPDX-License-Identifier: MIT
+// Copyright (c) 2018-2023, Advanced Micro Devices, Inc. All rights reserved.
+
+#pragma once
+
+#include "ck_tile/core.hpp"
+#include "ck_tile/host/host_tensor.hpp"
+#include <thread>
+
+namespace ck_tile {
+
+template <typename ADataType, typename AccDataType, typename BDataType>
+CK_TILE_HOST void reference_reduce(const HostTensor<ADataType>& a_m_n, HostTensor<BDataType>& b_m)
+{
+    auto f = [&](auto m) {
+        const int N = a_m_n.mDesc.get_lengths()[1];
+
+        AccDataType v_acc = 0;
+
+        for(int n = 0; n < N; ++n)
+        {
+            const ADataType v_a = a_m_n(m, n);
+
+            v_acc += v_a;
+        }
+
+        b_m(m) = ck_tile::type_convert<BDataType>(v_acc);
+    };
+
+    make_ParallelTensorFunctor(f, b_m.mDesc.get_lengths()[0])(std::thread::hardware_concurrency());
+}
+} // namespace ck_tile

include/ck_tile/host/reference/reference_softmax.hpp

+// SPDX-License-Identifier: MIT
+// Copyright (c) 2018-2023, Advanced Micro Devices, Inc. All rights reserved.
+
+#pragma once
+
+#include "ck_tile/core.hpp"
+#include "ck_tile/host/host_tensor.hpp"
+#include <thread>
+
+namespace ck_tile {
+
+template <typename ADataType, typename AccDataType, typename BDataType>
+CK_TILE_HOST void reference_softmax(const HostTensor<ADataType>& a_m_n,
+                                    HostTensor<BDataType>& b_m_n)
+{
+    auto f = [&](auto m) {
+        const int N = a_m_n.mDesc.get_lengths()[1];
+
+        AccDataType v_max = ck_tile::numeric<ADataType>::Lowest();
+
+        // max
+        for(int n = 0; n < N; ++n)
+        {
+            const ADataType v_a = a_m_n(m, n);
+
+            v_max = v_max < v_a ? v_a : v_max;
+        }
+
+        AccDataType v_exp_sum = 0;
+
+        // sum
+        for(int n = 0; n < N; ++n)
+        {
+            const ADataType v_a = a_m_n(m, n);
+
+            v_exp_sum += ck_tile::exp(v_a - v_max);
+        }
+
+        // elementwise
+        for(int n = 0; n < N; ++n)
+        {
+            const ADataType v_a = a_m_n(m, n);
+
+            b_m_n(m, n) = ck_tile::exp(v_a - v_max) / v_exp_sum;
+        }
+    };
+
+    make_ParallelTensorFunctor(f,
+                               b_m_n.mDesc.get_lengths()[0])(std::thread::hardware_concurrency());
+}
+} // namespace ck_tile

include/ck_tile/host/stream_config.hpp

+// SPDX-License-Identifier: MIT
+// Copyright (c) 2018-2023, Advanced Micro Devices, Inc. All rights reserved.
+
+#pragma once
+
+#include <hip/hip_runtime.h>
+
+namespace ck_tile {
+struct stream_config
+{
+    hipStream_t stream_id_ = nullptr;
+    bool time_kernel_      = false;
+    int log_level_         = 0;
+    int cold_niters_       = 3;
+    int nrepeat_           = 10;
+};
+} // namespace ck_tile

include/ck_tile/ops/common.hpp

+// SPDX-License-Identifier: MIT
+// Copyright (c) 2018-2024, Advanced Micro Devices, Inc. All rights reserved.
+
+#pragma once
+
+#include "ck_tile/ops/common/tensor_layout.hpp"

include/ck_tile/ops/common/README.md

+## common
+this folder is designed not to be included directly by use, e.g. if use include `ck_tile/ops/fmha.hpp`, then everything under `common` should also be included.
+
+to achieve this we will duplicate the header include path under `common` to other module under `ops/*` inside remod.py. for internal developer, you can also include `ck_tile/ops/common.hpp` for convenience. (and so does external users...)

include/ck_tile/ops/common/tensor_layout.hpp

+// SPDX-License-Identifier: MIT
+// Copyright (c) 2018-2023, Advanced Micro Devices, Inc. All rights reserved.
+
+#pragma once
+
+// TODO: this folder does not match the single namespace rule. need to refactor in the future
+namespace ck_tile {
+namespace tensor_layout {
+
+struct BaseTensorLayout
+{
+};
+
+namespace gemm {
+
+struct RowMajor : public BaseTensorLayout
+{
+    static constexpr const char* name = "RowMajor";
+};
+
+struct ColumnMajor : public BaseTensorLayout
+{
+    static constexpr const char* name = "ColumnMajor";
+};
+} // namespace gemm
+
+namespace convolution {
+
+// input tensor
+// packed NCW/NCHW/NCDHW
+struct NCW : public BaseTensorLayout
+{
+    static constexpr const char* name = "NCW";
+};
+
+struct NCHW : public BaseTensorLayout
+{
+    static constexpr const char* name = "NCHW";
+};
+
+struct NCDHW : public BaseTensorLayout
+{
+    static constexpr const char* name = "NCDHW";
+};
+
+// packed GNCW/GNCHW/GNCDHW
+struct GNCW : public BaseTensorLayout
+{
+    static constexpr const char* name = "GNCW";
+};
+
+struct GNCHW : public BaseTensorLayout
+{
+    static constexpr const char* name = "GNCHW";
+};
+
+struct GNCDHW : public BaseTensorLayout
+{
+    static constexpr const char* name = "GNCDHW";
+};
+
+// input tensor
+// packed NWC/NHWC/NDHWC
+struct NWC : public BaseTensorLayout
+{
+    static constexpr const char* name = "NWC";
+};
+
+struct NHWC : public BaseTensorLayout
+{
+    static constexpr const char* name = "NHWC";
+};
+
+struct NDHWC : public BaseTensorLayout
+{
+    static constexpr const char* name = "NDHWC";
+};
+
+// input tensor
+// packed GNWC/GNHWC/GNDHWC
+struct GNWC : public BaseTensorLayout
+{
+    static constexpr const char* name = "GNWC";
+};
+
+struct GNHWC : public BaseTensorLayout
+{
+    static constexpr const char* name = "GNHWC";
+};
+
+struct GNDHWC : public BaseTensorLayout
+{
+    static constexpr const char* name = "GNDHWC";
+};
+
+// for input bias
+struct GC : public BaseTensorLayout
+{
+    static constexpr const char* name = "GC";
+};
+
+// input tensor
+// packed NWGC/NHWGC/NDHWGC
+struct NWGC : public BaseTensorLayout
+{
+    static constexpr const char* name = "NWGC";
+};
+
+struct NHWGC : public BaseTensorLayout
+{
+    static constexpr const char* name = "NHWGC";
+};
+
+struct NDHWGC : public BaseTensorLayout
+{
+    static constexpr const char* name = "NDHWGC";
+};
+
+// input tensor
+// strided layout
+struct G_NW_C : public BaseTensorLayout
+{
+    static constexpr const char* name = "G_NW_C";
+};
+
+struct G_NHW_C : public BaseTensorLayout
+{
+    static constexpr const char* name = "G_NHW_C";
+};
+
+struct G_NDHW_C : public BaseTensorLayout
+{
+    static constexpr const char* name = "G_NDHW_C";
+};
+
+// for input bias
+struct G_C : public BaseTensorLayout
+{
+    static constexpr const char* name = "G_C";
+};
+
+// weight tensor
+// packed KCX/KCYX/KCZYX
+struct KCX : public BaseTensorLayout
+{
+    static constexpr const char* name = "KCX";
+};
+
+struct KCYX : public BaseTensorLayout
+{
+    static constexpr const char* name = "KCYX";
+};
+
+struct KCZYX : public BaseTensorLayout
+{
+    static constexpr const char* name = "KCZYX";
+};
+
+// weight tensor
+// packed KCX/KCYX/KCZYX
+struct GKCX : public BaseTensorLayout
+{
+    static constexpr const char* name = "GKCX";
+};
+
+struct GKCYX : public BaseTensorLayout
+{
+    static constexpr const char* name = "GKCYX";
+};
+
+struct GKCZYX : public BaseTensorLayout
+{
+    static constexpr const char* name = "GKCZYX";
+};
+
+// weight tensor
+// packed KXC/KYXC/KZYXC
+struct KXC : public BaseTensorLayout
+{
+    static constexpr const char* name = "KXC";
+};
+
+struct KYXC : public BaseTensorLayout
+{
+    static constexpr const char* name = "KYXC";
+};
+
+struct KZYXC : public BaseTensorLayout
+{
+    static constexpr const char* name = "KZYXC";
+};
+
+// weight tensor
+// packed GKXC/GKYXC/GKZYXC
+struct GKXC : public BaseTensorLayout
+{
+    static constexpr const char* name = "GKXC";
+};
+
+struct GKYXC : public BaseTensorLayout
+{
+    static constexpr const char* name = "GKYXC";
+};
+
+struct GKZYXC : public BaseTensorLayout
+{
+    static constexpr const char* name = "GKZYXC";
+};
+
+// weight tensor
+// packed KXGC/KYXGC/KZYXGC
+struct KXGC : public BaseTensorLayout
+{
+    static constexpr const char* name = "KXGC";
+};
+
+struct KYXGC : public BaseTensorLayout
+{
+    static constexpr const char* name = "KYXGC";
+};
+
+struct KZYXGC : public BaseTensorLayout
+{
+    static constexpr const char* name = "KZYXGC";
+};
+
+// weight tensor
+// strided
+struct G_K_X_C : public BaseTensorLayout
+{
+    static constexpr const char* name = "G_K_X_C";
+};
+
+struct G_K_YX_C : public BaseTensorLayout
+{
+    static constexpr const char* name = "G_K_YX_C";
+};
+
+struct G_K_ZYX_C : public BaseTensorLayout
+{
+    static constexpr const char* name = "G_K_ZYX_C";
+};
+
+// output tensor
+// packed NKW/NKHW/NKDHW
+struct NKW : public BaseTensorLayout
+{
+    static constexpr const char* name = "NKW";
+};
+
+struct NKHW : public BaseTensorLayout
+{
+    static constexpr const char* name = "NKHW";
+};
+
+struct NKDHW : public BaseTensorLayout
+{
+    static constexpr const char* name = "NKDHW";
+};
+
+// output tensor
+// packed GNKW/GNKHW/GNKDHW
+struct GNKW : public BaseTensorLayout
+{
+    static constexpr const char* name = "GNKW";
+};
+
+struct GNKHW : public BaseTensorLayout
+{
+    static constexpr const char* name = "GNKHW";
+};
+
+struct GNKDHW : public BaseTensorLayout
+{
+    static constexpr const char* name = "GNKDHW";
+};
+
+// output tensor
+// packed NWK/NHWK/NDHWK
+struct NWK : public BaseTensorLayout
+{
+    static constexpr const char* name = "NWK";
+};
+
+struct NHWK : public BaseTensorLayout
+{
+    static constexpr const char* name = "NHWK";
+};
+
+struct NDHWK : public BaseTensorLayout
+{
+    static constexpr const char* name = "NDHWK";
+};
+
+// output tensor
+// packed GNWK/GNHWK/GNDHWK
+struct GNWK : public BaseTensorLayout
+{
+    static constexpr const char* name = "GNWK";
+};
+
+struct GNHWK : public BaseTensorLayout
+{
+    static constexpr const char* name = "GNHWK";
+};
+
+struct GNDHWK : public BaseTensorLayout
+{
+    static constexpr const char* name = "GNDHWK";
+};
+
+// output tensor
+// packed NWGK/NHWGK/NDHWGK
+struct NWGK : public BaseTensorLayout
+{
+    static constexpr const char* name = "NWGK";
+};
+
+struct NHWGK : public BaseTensorLayout
+{
+    static constexpr const char* name = "NHWGK";
+};
+
+struct NDHWGK : public BaseTensorLayout
+{
+    static constexpr const char* name = "NDHWGK";
+};
+
+// output tensor
+// strided layout
+struct G_NW_K : public BaseTensorLayout
+{
+    static constexpr const char* name = "G_NW_K";
+};
+
+struct G_NHW_K : public BaseTensorLayout
+{
+    static constexpr const char* name = "G_NHW_K";
+};
+
+struct G_NDHW_K : public BaseTensorLayout
+{
+    static constexpr const char* name = "G_NDHW_K";
+};
+
+// for output bias
+struct G_K : public BaseTensorLayout
+{
+    static constexpr const char* name = "G_K";
+};
+
+// K-reduced output tensor (packed)
+struct GNW : public BaseTensorLayout
+{
+    static constexpr const char* name = "GNW";
+};
+
+struct GNHW : public BaseTensorLayout
+{
+    static constexpr const char* name = "GNHW";
+};
+
+struct GNDHW : public BaseTensorLayout
+{
+    static constexpr const char* name = "GNDHW";
+};
+
+// K-reduced output tensor (packed)
+struct NWG : public BaseTensorLayout
+{
+    static constexpr const char* name = "NWG";
+};
+
+struct NHWG : public BaseTensorLayout
+{
+    static constexpr const char* name = "NHWG";
+};
+
+struct NDHWG : public BaseTensorLayout
+{
+    static constexpr const char* name = "NDHWG";
+};
+
+// K-reduced output tensor (strided)
+struct G_NW : public BaseTensorLayout
+{
+    static constexpr const char* name = "G_NW";
+};
+
+struct G_NHW : public BaseTensorLayout
+{
+    static constexpr const char* name = "G_NHW";
+};
+
+struct G_NDHW : public BaseTensorLayout
+{
+    static constexpr const char* name = "G_NDHW";
+};
+
+} // namespace convolution
+
+template <
+    typename Layout,
+    typename std::enable_if<std::is_base_of<BaseTensorLayout, Layout>::value, bool>::type = false>
+std::ostream& operator<<(std::ostream& os, const Layout&)
+{
+    os << Layout::name;
+    return os;
+}
+
+} // namespace tensor_layout
+} // namespace ck_tile

include/ck_tile/ops/epilogue.hpp

+// SPDX-License-Identifier: MIT
+// Copyright (c) 2018-2024, Advanced Micro Devices, Inc. All rights reserved.
+
+#pragma once
+
+#include "ck_tile/ops/epilogue/default_2d_epilogue.hpp"
+#include "ck_tile/ops/common/tensor_layout.hpp"

include/ck_tile/ops/epilogue/default_2d_epilogue.hpp

+// SPDX-License-Identifier: MIT
+// Copyright (c) 2018-2023, Advanced Micro Devices, Inc. All rights reserved.
+
+#pragma once
+
+#include "ck_tile/core.hpp"
+
+namespace ck_tile {
+
+// this epilogue just store out a M*N matrix, row major
+
+template <typename AccDataType_, typename ODataType_, bool kPadM_, bool kPadN_>
+struct Default2DEpilogueProblem
+{
+    using AccDataType           = remove_cvref_t<AccDataType_>;
+    using ODataType             = remove_cvref_t<ODataType_>;
+    static constexpr bool kPadM = kPadM_;
+    static constexpr bool kPadN = kPadN_;
+};
+
+template <typename Problem_, typename Policy_ = void>
+struct Default2DEpilogue
+{
+    using Problem               = remove_cvref_t<Problem_>;
+    using AccDataType           = remove_cvref_t<typename Problem::AccDataType>;
+    using ODataType             = remove_cvref_t<typename Problem::ODataType>;
+    static constexpr bool kPadM = Problem::kPadM;
+    static constexpr bool kPadN = Problem::kPadN;
+
+    CK_TILE_HOST_DEVICE static constexpr index_t GetSmemSize() { return 0; }
+
+    // TODO: this function assume store out vector size is the same as OAccTile last dimension size
+    //       how do we fix this ?
+    template <typename ODramWindowTmp, typename OAccTile>
+    CK_TILE_DEVICE auto operator()(ODramWindowTmp& o_dram_window_tmp, const OAccTile& o_acc_tile)
+    {
+
+        // TODO: this is ugly
+        if constexpr(kPadM || kPadN)
+        {
+            store_tile_raw(o_dram_window_tmp, cast_tile<ODataType>(o_acc_tile));
+            buffer_store_fence();
+        }
+        else
+        {
+            store_tile(o_dram_window_tmp, cast_tile<ODataType>(o_acc_tile));
+        }
+    }
+};
+} // namespace ck_tile

include/ck_tile/ops/fmha.hpp

+// SPDX-License-Identifier: MIT
+// Copyright (c) 2018-2024, Advanced Micro Devices, Inc. All rights reserved.
+
+#pragma once
+
+#include "ck_tile/ops/fmha/block/block_masking.hpp"
+#include "ck_tile/ops/fmha/kernel/fmha_fwd_kernel.hpp"
+#include "ck_tile/ops/fmha/kernel/fmha_fwd_tile_partitioner.hpp"
+#include "ck_tile/ops/fmha/pipeline/block_fmha_pipeline_enum.hpp"
+#include "ck_tile/ops/fmha/pipeline/block_fmha_pipeline_problem.hpp"
+#include "ck_tile/ops/fmha/pipeline/block_fmha_pipeline_qr_ks_vs.hpp"
+#include "ck_tile/ops/fmha/pipeline/block_fmha_pipeline_qr_ks_vs_async.hpp"
+#include "ck_tile/ops/fmha/pipeline/block_fmha_pipeline_qr_ks_vs_async_default_policy.hpp"
+#include "ck_tile/ops/fmha/pipeline/block_fmha_pipeline_qr_ks_vs_default_policy.hpp"
+#include "ck_tile/ops/fmha/pipeline/block_fmha_pipeline_qr_ks_vs_fp8.hpp"
+#include "ck_tile/ops/fmha/pipeline/block_fmha_pipeline_qs_ks_vs.hpp"
+#include "ck_tile/ops/fmha/pipeline/block_fmha_pipeline_qs_ks_vs_default_policy.hpp"
+#include "ck_tile/ops/fmha/pipeline/block_fmha_pipeline_qx_ks_vs_custom_policy.hpp"
+#include "ck_tile/ops/fmha/pipeline/tile_fmha_shape.hpp"
+#include "ck_tile/ops/fmha/pipeline/tile_fmha_traits.hpp"
+#include "ck_tile/ops/common/tensor_layout.hpp"

include/ck_tile/ops/fmha/block/block_masking.hpp

+// SPDX-License-Identifier: MIT
+// Copyright (c) 2018-2023, Advanced Micro Devices, Inc. All rights reserved.
+
+#pragma once
+
+#include "ck_tile/core.hpp"
+
+namespace ck_tile {
+
+enum struct GenericAttentionMaskEnum
+{
+    NO_MASK = 0,
+
+    // below enum could be causal, or sliding window
+    MASK_FROM_TOP_LEFT     = 1,
+    MASK_FROM_BOTTOM_RIGHT = 2,
+
+    // this enum maybe not used by xformer/FA, since it's hard to
+    // specify left/right window for varlen case. put it here for
+    // debug purpose
+    MASK_GENERIC,
+};
+
+// clang-format off
+/*  generic Attention Mask Coordinate
+    use x(horizontal axis), y(vertical axis) to describe mask.
+    top-left corner is origin
+
+    x=1/y=5(top-left)  x=4/y=5(botm-r)    x=6/y=5            x=8/y=5(no mask)
+    1 * * * * * * *    1 1 1 1 * * * *    1 1 1 1 1 1 * *    1 1 1 1 1 1 1 1
+    1 1 * * * * * *    1 1 1 1 1 * * *    1 1 1 1 1 1 1 *    1 1 1 1 1 1 1 1
+    1 1 1 * * * * *    1 1 1 1 1 1 * *    1 1 1 1 1 1 1 1    1 1 1 1 1 1 1 1
+    1 1 1 1 * * * *    1 1 1 1 1 1 1 *    1 1 1 1 1 1 1 1    1 1 1 1 1 1 1 1
+    1 1 1 1 1 * * *    1 1 1 1 1 1 1 1    1 1 1 1 1 1 1 1    1 1 1 1 1 1 1 1
+    l=7,-1/r=0(tl)     l=7,-1/r=0(br)
+
+    x=1/y=2            x=4/y=2            x=6/y=2            x=8/y=2
+    1 * * * * * * *    1 1 1 1 * * * *    1 1 1 1 1 1 * *    1 1 1 1 1 1 1 1
+    1 1 * * * * * *    1 1 1 1 1 * * *    1 1 1 1 1 1 1 *    1 1 1 1 1 1 1 1
+    * 1 1 * * * * *    * 1 1 1 1 1 * *    * 1 1 1 1 1 1 1    * 1 1 1 1 1 1 1
+    * * 1 1 * * * *    * * 1 1 1 1 1 *    * * 1 1 1 1 1 1    * * 1 1 1 1 1 1
+    * * * 1 1 * * *    * * * 1 1 1 1 1    * * * 1 1 1 1 1    * * * 1 1 1 1 1
+    l=1/r=0(tl)        l=1/r=3(tl)        l=1/r=5(tl)        l=1/r=7(tl)
+                       l=4/r=0(br)        l=4/r=2(br)        l=4/r=4(br)
+
+                       x=4/y=-1           x=6/y=-1            x=8/y=-1
+                       * * 1 1 * * * *    * * 1 1 1 1 * *    * * 1 1 1 1 1 1
+                       * * * 1 1 * * *    * * * 1 1 1 1 *    * * * 1 1 1 1 1
+                       * * * * 1 1 * *    * * * * 1 1 1 1    * * * * 1 1 1 1
+                       * * * * * 1 1 *    * * * * * 1 1 1    * * * * * 1 1 1
+                       * * * * * * 1 1    * * * * * * 1 1    * * * * * * 1 1
+
+    x=-2/y=5           x=1/y=5(top-left)  x=0/y=5(botm-r)
+    * * * * * * * *    1 * * *            * * * *
+    * * * * * * * *    1 1 * *            1 * * *
+    * * * * * * * *    1 1 1 *            1 1 * *
+    1 * * * * * * *    1 1 1 1            1 1 1 *
+    1 1 * * * * * *    1 1 1 1            1 1 1 1
+
+    Validations:
+        x + y > 1 (x + y >= 2)
+
+    Note:
+        y = seq_q, x = 1 -> top-left
+        y = seq_q, x = seq_k - seq_q + 1 -> bottom-right
+        y < seq_q, x < seq_k -> local-attn
+        y = seq_q, x = seq_k -> no mask
+
+*/
+namespace impl {
+    template <bool IsMasking_, bool IsLocal_> struct MaskName;
+    template<> struct MaskName<false, false> { static constexpr const char * name = "mn"; };
+    template<> struct MaskName<false, true> { static constexpr const char * name = "mn"; };
+    template<> struct MaskName<true, false> { static constexpr const char * name = "mc"; };
+    template<> struct MaskName<true, true> { static constexpr const char * name = "mg"; };
+}
+// clang-format on
+
+template <bool IsMasking_ = true, bool IsLocal_ = false>
+struct GenericAttentionMask
+{
+    static constexpr bool IsMasking = IsMasking_; // false will disable masking
+    static constexpr bool IsLocal   = IsLocal_;   // if true, upper/lower area could have mask,
+                                                  // else only upper-right could have mask
+
+    static constexpr const char* name = impl::MaskName<IsMasking, IsLocal>::name;
+
+    CK_TILE_HOST_DEVICE GenericAttentionMask(index_t y_total_, index_t x_total_)
+        : GenericAttentionMask(0, 0, y_total_, x_total_)
+    {
+    }
+
+    CK_TILE_HOST_DEVICE
+    GenericAttentionMask(index_t y_, index_t x_, index_t y_total_, index_t x_total_)
+        : y(y_), x(x_), y_total(y_total_), x_total(x_total_)
+    {
+    }
+    template <typename MaskCoordinates>
+    CK_TILE_HOST_DEVICE GenericAttentionMask(const MaskCoordinates& mask_coord)
+        : y(mask_coord.at(number<0>{})),
+          x(mask_coord.at(number<1>{})),
+          y_total(mask_coord.at(number<2>{})),
+          x_total(mask_coord.at(number<3>{}))
+    {
+    }
+
+    // to get the loop length along X axis, return index:[start, end), end-start=length
+    // use this if need loop over X axis tile by tile (like k-seqlen loopover)
+    // TODO: x_end still could be negative, so end-start could be negative(need check)
+    template <index_t YTile, index_t XTile>
+    CK_TILE_HOST_DEVICE constexpr auto
+    GetTileRangeAlongX(index_t i_y, number<YTile>, number<XTile>) const
+    {
+        if constexpr(!IsMasking)
+        {
+            return ck_tile::make_tuple(0, x_total);
+        }
+        else
+        {
+            // get the tile start/end range assum we loop over along X tile by tile
+            index_t x_start = [&]() {
+                if constexpr(IsLocal)
+                {
+                    index_t tmp = max(-y + i_y + 1, 0);
+                    return (tmp / XTile) * XTile; // round to tile aligned
+                }
+                else
+                {
+                    return 0;
+                }
+            }();
+
+            // TODO: end could be negative, we ignore clamp here, and let caller to check
+            //      ... in which case end-start is negative
+            index_t x_end = [&]() {
+                index_t tmp = min(i_y + YTile - 1 + x, x_total);
+                return ((tmp + XTile - 1) / XTile) * XTile;
+            }();
+
+            return ck_tile::make_tuple(x_start, x_end);
+        }
+    }
+
+    // per-pixel check if out-of-bound, if true, need mask a value(like -INF)
+    CK_TILE_HOST_DEVICE constexpr auto IsOutOfBound(index_t i_y, index_t i_x) const
+    {
+        if constexpr(!IsMasking)
+        {
+            return i_x >= x_total;
+        }
+        else
+        {
+            // no need to do min/max here, since i_x will never be < 0 or >= x_total
+            index_t x_start = -y + i_y + 1;
+            index_t x_end   = min(i_y + x, x_total);
+
+            if constexpr(IsLocal)
+            {
+                return i_x < x_start || i_x >= x_end;
+            }
+            else
+            {
+                return i_x >= x_end;
+            }
+        }
+    }
+
+    // if current tile is at the edge, means need per-pixel mask check.
+    // otherwise no need to check per-pixel
+    // Attention! assume the idex passed in this function is with in range of GetTileRangeAlongX()
+    // can be used as a fast-path to decide if do per-pixel check or not
+    template <index_t TileHeight, index_t TileWidth>
+    CK_TILE_HOST_DEVICE constexpr auto
+    IsEdgeTile(index_t i_tile_top, index_t i_tile_left, number<TileHeight>, number<TileWidth>) const
+    {
+        if constexpr(IsLocal)
+        {
+            // check top-right corner > x or left-borrom corner < x
+            index_t i_tile_right  = i_tile_left + TileWidth;
+            index_t i_tile_bottom = i_tile_top + TileHeight;
+            index_t x_end         = min(i_tile_top + x, x_total);
+
+            bool top_right_edge          = i_tile_right > (i_tile_top + x);
+            bool bottom_left_edge        = i_tile_bottom > (i_tile_left + y);
+            bool is_partial_out_of_bound = i_tile_right > x_end; // only consider right-pad for now
+
+            return top_right_edge || bottom_left_edge || is_partial_out_of_bound;
+        }
+        else
+        {
+            // only need to check top-right corner > x
+            index_t i_tile_right = i_tile_left + TileWidth;
+            index_t x_end        = min(i_tile_top + x, x_total);
+
+            bool top_right_edge = i_tile_right > x_end;
+            return top_right_edge;
+        }
+    }
+
+    private:
+    index_t y, x;
+    index_t y_total, x_total;
+};
+
+// clang-format off
+namespace impl {
+    template <bool IsMasking_> struct SimplifiedMaskName;
+    template<> struct SimplifiedMaskName<false> { static constexpr const char * name = "nomask"; };
+    template<> struct SimplifiedMaskName<true> { static constexpr const char * name = "mask"; };
+}
+// clang-format on
+
+// this version only have 2 variation: masking and non-masking
+// This is more friendly to codegen (e.g. need generate less kernel)
+// ... with the trade-off that may have more instruction in causal mode
+template <bool IsMasking_ = true>
+struct SimplifiedGenericAttentionMask
+{
+    static constexpr bool IsMasking = IsMasking_; // false will disable masking
+
+    static constexpr const char* name = impl::SimplifiedMaskName<IsMasking>::name;
+
+    CK_TILE_HOST_DEVICE SimplifiedGenericAttentionMask(index_t y_total_, index_t x_total_)
+        : SimplifiedGenericAttentionMask(0, 0, y_total_, x_total_)
+    {
+    }
+
+    CK_TILE_HOST_DEVICE
+    SimplifiedGenericAttentionMask(index_t y_, index_t x_, index_t y_total_, index_t x_total_)
+        : y(y_), x(x_), y_total(y_total_), x_total(x_total_)
+    {
+    }
+    template <typename MaskCoordinates>
+    CK_TILE_HOST_DEVICE SimplifiedGenericAttentionMask(const MaskCoordinates& mask_coord)
+        : y(mask_coord.at(number<0>{})),
+          x(mask_coord.at(number<1>{})),
+          y_total(mask_coord.at(number<2>{})),
+          x_total(mask_coord.at(number<3>{}))
+    {
+    }
+
+    // to get the loop length along X axis, return index:[start, end), end-start=length
+    // use this if need loop over X axis tile by tile (like k-seqlen loopover)
+    // TODO: x_end still could be negative, so end-start could be negative(need check)
+    template <index_t YTile, index_t XTile>
+    CK_TILE_HOST_DEVICE constexpr auto
+    GetTileRangeAlongX(index_t i_y, number<YTile>, number<XTile>) const
+    {
+        if constexpr(!IsMasking)
+        {
+            return ck_tile::make_tuple(0, x_total);
+        }
+        else
+        {
+            // get the tile start/end range assum we loop over along X tile by tile
+            index_t x_start = [&]() {
+                index_t tmp = max(-y + i_y + 1, 0);
+                return (tmp / XTile) * XTile; // round to tile aligned
+            }();
+
+            // TODO: end could be negative, we ignore clamp here, and let caller to check
+            //      ... in which case end-start is negative
+            index_t x_end = [&]() {
+                index_t tmp = min(i_y + YTile - 1 + x, x_total);
+                return ((tmp + XTile - 1) / XTile) * XTile;
+            }();
+
+            return ck_tile::make_tuple(x_start, x_end);
+        }
+    }
+
+    // per-pixel check if out-of-bound, if true, need mask a value(like -INF)
+    CK_TILE_HOST_DEVICE constexpr auto IsOutOfBound(index_t i_y, index_t i_x) const
+    {
+        if constexpr(!IsMasking)
+        {
+            // the only case that need do following compare is under kPadSeqLenK
+            // ... for non-masking kernel.
+            return i_x >= x_total;
+        }
+        else
+        {
+            index_t x_start = -y + i_y + 1;          // this could be negative, but it's fine
+            index_t x_end   = min(i_y + x, x_total); // need min in case x is padded
+
+            return i_x < x_start || i_x >= x_end;
+        }
+    }
+
+    // if current tile is at the edge, means need per-pixel mask check.
+    // otherwise no need to check per-pixel
+    // Attention! assume the idex passed in this function is with in range of GetTileRangeAlongX()
+    // can be used as a fast-path to decide if do per-pixel check or not
+    template <index_t TileHeight, index_t TileWidth>
+    CK_TILE_HOST_DEVICE constexpr auto
+    IsEdgeTile(index_t i_y, index_t i_x, number<TileHeight>, number<TileWidth>) const
+    {
+        if constexpr(!IsMasking)
+        {
+            // the only case that need do following compare is under kPadSeqLenK
+            // ... for non-masking kernel.
+            // return (i_x < x_total) && ((i_x + TileWidth) > x_total);
+
+            // TODO: no need to check begin
+            return (i_x + TileWidth) > x_total;
+        }
+        else
+        {
+            // check top-right corner > x or left-borrom corner < x
+            index_t i_x_end = i_x + TileWidth;
+            index_t i_y_end = i_y + TileHeight;
+            // index_t x_end    = min(i_y + x, x_total);
+
+            bool top_right_edge   = i_x_end > min(i_y + x, x_total); // consider right pad
+            bool bottom_left_edge = i_y_end > (i_x + y);
+            // bool is_partial_out_of_bound = i_x_end > x_end; // only consider right-pad for now
+
+            return top_right_edge || bottom_left_edge;
+        }
+    }
+
+    private:
+    index_t y, x;
+    index_t y_total, x_total;
+};
+
+// TODO: prefer use this function in host code
+// can convert from the FA style left/right to our generic coordinate
+// if left_size < 0 && right_size = 0, it is normal causal mask
+// local is left_size >=0 or right_size >=0
+CK_TILE_HOST_DEVICE constexpr auto
+make_generic_attention_mask_coordinates_from_lr_window(index_t left_size,
+                                                       index_t right_size,
+                                                       index_t y_total,
+                                                       index_t x_total,
+                                                       bool is_top_left = true)
+{
+    // TODO: below should all use sgpr arithmetic
+    index_t left_size_tmp  = is_top_left ? y_total - 1 : x_total - 1;
+    index_t right_size_tmp = is_top_left ? x_total - 1 : y_total - 1;
+
+    left_size  = left_size < 0 ? left_size_tmp : left_size;
+    right_size = right_size < 0 ? right_size_tmp : right_size;
+
+    index_t x_tmp = is_top_left ? 0 : x_total - y_total;
+    index_t y_tmp = is_top_left ? 0 : y_total - x_total;
+
+    index_t x = 1 + right_size + x_tmp;
+    index_t y = 1 + left_size + y_tmp;
+
+    return ck_tile::make_tuple(y, x, y_total, x_total);
+}
+
+template <typename MaskType>
+CK_TILE_HOST_DEVICE constexpr auto
+make_generic_attention_mask_from_lr_window(index_t left_size,
+                                           index_t right_size,
+                                           index_t y_total,
+                                           index_t x_total,
+                                           bool is_top_left = true)
+{
+    auto r = make_generic_attention_mask_coordinates_from_lr_window(
+        left_size, right_size, y_total, x_total, is_top_left);
+    return MaskType{r.at(ck_tile::number<0>{}), r.at(ck_tile::number<1>{}), y_total, x_total};
+}
+} // namespace ck_tile

include/ck_tile/ops/fmha/kernel/fmha_fwd_kernel.hpp

+// SPDX-License-Identifier: MIT
+// Copyright (c) 2018-2023, Advanced Micro Devices, Inc. All rights reserved.
+
+#pragma once
+
+#include "ck_tile/core.hpp"
+#include "ck_tile/ops/common.hpp"
+#include <string>
+#include <type_traits>
+
+// S[seqlen_q, seqlen_k] = Q[seqlen_q, hdim_q] * K[seqlen_k, hdim_q]
+// S'[seqlen_q, seqlen_k] = S[seqlen_q, seqlen_k] * Scale[1]
+// S''[seqlen_q, seqlen_k] = S'[seqlen_q, seqlen_k] + Bias[seqlen_q, seqlen_k]
+// P[seqlen_q, seqlen_k] = Softmax(S[seqlen_q, seqlen_k])
+// O[seqlen_q, hdim_v] = P[seqlen_q, seqlen_k] * V[hdim_v, seqlen_k]
+
+namespace ck_tile {
+
+template <typename TilePartitioner_, typename FmhaPipeline_, typename EpiloguePipeline_>
+struct FmhaFwdKernel
+{
+    using TilePartitioner                         = ck_tile::remove_cvref_t<TilePartitioner_>;
+    using FmhaPipeline                            = ck_tile::remove_cvref_t<FmhaPipeline_>;
+    using EpiloguePipeline                        = ck_tile::remove_cvref_t<EpiloguePipeline_>;
+    static constexpr ck_tile::index_t kBlockSize  = FmhaPipeline::kBlockSize;
+    static constexpr ck_tile::index_t kBlockPerCu = FmhaPipeline::kBlockPerCu;
+    static_assert(kBlockPerCu > 0);
+    static constexpr ck_tile::index_t kBlockPerCuInput = FmhaPipeline::Problem::kBlockPerCu;
+
+    using QDataType              = ck_tile::remove_cvref_t<typename FmhaPipeline::QDataType>;
+    using KDataType              = ck_tile::remove_cvref_t<typename FmhaPipeline::KDataType>;
+    using VDataType              = ck_tile::remove_cvref_t<typename FmhaPipeline::VDataType>;
+    using BiasDataType           = ck_tile::remove_cvref_t<typename FmhaPipeline::BiasDataType>;
+    using LSEDataType            = ck_tile::remove_cvref_t<typename FmhaPipeline::LSEDataType>;
+    using ODataType              = ck_tile::remove_cvref_t<typename FmhaPipeline::ODataType>;
+    static constexpr bool kIsFp8 = FmhaPipeline::kIsFp8;
+
+    using VLayout = ck_tile::remove_cvref_t<typename FmhaPipeline::VLayout>;
+
+    static constexpr bool kIsGroupMode      = FmhaPipeline::kIsGroupMode;
+    static constexpr bool kPadSeqLenQ       = FmhaPipeline::kPadSeqLenQ;
+    static constexpr bool kPadSeqLenK       = FmhaPipeline::kPadSeqLenK;
+    static constexpr bool kPadHeadDimQ      = FmhaPipeline::kPadHeadDimQ;
+    static constexpr bool kPadHeadDimV      = FmhaPipeline::kPadHeadDimV;
+    static constexpr bool kHasBias          = FmhaPipeline::kHasBias;
+    static constexpr bool kStoreLSE         = FmhaPipeline::kStoreLSE;
+    static constexpr bool kDoFp8StaticQuant = FmhaPipeline::Problem::kDoFp8StaticQuant;
+    using FmhaMask                 = ck_tile::remove_cvref_t<typename FmhaPipeline::FmhaMask>;
+    static constexpr bool kHasMask = FmhaMask::IsMasking;
+
+    // clang-format off
+    template <typename T> struct t2s;
+    template <> struct t2s<float> { static constexpr const char * name = "fp32"; };
+    template <> struct t2s<ck_tile::fp16_t> { static constexpr const char * name = "fp16"; };
+    template <> struct t2s<ck_tile::bf16_t> { static constexpr const char * name = "bf16"; };
+    template <> struct t2s<ck_tile::fp8_t> { static constexpr const char * name = "fp8"; };
+    template <> struct t2s<ck_tile::bf8_t> { static constexpr const char * name = "bf8"; };
+    // clang-format on
+
+    __host__ static std::string GetName()
+    {
+        // sync with generate.py
+        // clang-format off
+        using bfs = typename FmhaPipeline::BlockFmhaShape;
+        using gbr = typename bfs::Gemm0BlockWarps;
+        using gwt = typename bfs::Gemm0WarpTile;
+        #define _SS_  std::string
+        #define _TS_  std::to_string
+        auto pn = [&] () {
+            std::string n;
+            if (kPadSeqLenQ) n += "s";
+            if (kPadSeqLenK) n += "sk";
+            if (kPadHeadDimQ) n += "d";
+            if (kPadHeadDimV) n += "dv";
+            return n.empty() ? n : std::string("p") + n; }();
+        return
+            _SS_("fmha_fwd_d") + _TS_(bfs::kK0BlockLength) + "_" + _SS_(t2s<QDataType>::name) +
+            "_" + (kIsGroupMode ? "group" : "batch") + "_" +
+            "b" + _TS_(bfs::kM0) + "x" + _TS_(bfs::kN0) + "x" + _TS_(bfs::kK0) + "x" +
+                    _TS_(bfs::kN1) + "x" + _TS_(bfs::kK1) + "x" + _TS_(bfs::kK0BlockLength) + "_" +
+            "r" + _TS_(gbr::at(ck_tile::number<0>{})) + "x" + _TS_(gbr::at(ck_tile::number<1>{})) + "x" + _TS_(gbr::at(ck_tile::number<2>{})) + "_" +
+            "w" + _TS_(gwt::at(ck_tile::number<0>{})) + "x" + _TS_(gwt::at(ck_tile::number<1>{})) + "x" + _TS_(gwt::at(ck_tile::number<2>{})) + "_" +
+            (kBlockPerCuInput == -1 ? "" : ("o" + _TS_(kBlockPerCu) + "_")) + _SS_(FmhaPipeline::name) + "_" +
+            "v" + (std::is_same_v<VLayout, ck_tile::tensor_layout::gemm::RowMajor> ? "r" : "c") + (pn.empty() ? "" : "_" + pn) +
+            (kHasBias ? "_bias" : "") + (kHasMask ? "_" + _SS_(FmhaMask::name) : "") + (kStoreLSE ? "_lse" : "" ) + (kDoFp8StaticQuant ? "_squant" : "" );
+        #undef _SS_
+        #undef _TS_
+        // clang-format on
+    }
+
+    template <ck_tile::index_t I> // to avoid duplicated base class prblem, introduce an template
+                                  // arg
+    struct FmhaFwdEmptyKargs
+    {
+    };
+
+    // kargs use aggregate initializer, so no constructor will provided
+    // use inheritance to minimize karg size
+    // user need to use MakeKargs() function to create kargs.
+    struct FmhaFwdCommonKargs
+    {
+        const void* q_ptr;
+        const void* k_ptr;
+        const void* v_ptr;
+        void* o_ptr;
+
+        ck_tile::index_t seqlen_q;
+        ck_tile::index_t seqlen_k;
+        ck_tile::index_t hdim_q;
+        ck_tile::index_t hdim_v;
+
+        // for MQA/GQA, nhead could be different. This parameter is nhead_q / nhead_k
+        // if this param is larger than 1, indicate MQA/GQA case
+        ck_tile::index_t nhead_ratio_qk;
+        float scale_s;
+
+        ck_tile::index_t stride_q;
+        ck_tile::index_t stride_k;
+        ck_tile::index_t stride_v;
+        ck_tile::index_t stride_o;
+
+        ck_tile::index_t nhead_stride_q;
+        ck_tile::index_t nhead_stride_k;
+        ck_tile::index_t nhead_stride_v;
+        ck_tile::index_t nhead_stride_o;
+    };
+
+    struct FmhaFwdCommonBiasKargs
+    {
+        const void* bias_ptr               = nullptr;
+        ck_tile::index_t stride_bias       = 0;
+        ck_tile::index_t nhead_stride_bias = 0;
+    };
+
+    struct FmhaFwdBatchModeBiasKargs : FmhaFwdCommonBiasKargs
+    {
+        ck_tile::index_t batch_stride_bias = 0;
+    };
+
+    struct FmhaFwdMaskKargs
+    {
+        // ck_tile::index_t window_size_left, window_size_right;
+        ck_tile::index_t window_size_left, window_size_right;
+        ck_tile::GenericAttentionMaskEnum mask_type;
+    };
+
+    struct FmhaFwdFp8StaticQuantKargs
+    {
+        float scale_p;
+        float scale_o;
+    };
+
+    struct FmhaFwdCommonLSEKargs
+    {
+        void* lse_ptr                     = nullptr;
+        ck_tile::index_t nhead_stride_lse = 0;
+    };
+
+    struct FmhaFwdBatchModeLSEKargs : FmhaFwdCommonLSEKargs
+    {
+        ck_tile::index_t batch_stride_lse = 0;
+    };
+
+    struct FmhaFwdBatchModeKargs
+        : FmhaFwdCommonKargs,
+          std::conditional_t<kHasBias, FmhaFwdBatchModeBiasKargs, FmhaFwdEmptyKargs<0>>,
+          std::conditional_t<kHasMask, FmhaFwdMaskKargs, FmhaFwdEmptyKargs<1>>,
+          std::conditional_t<kStoreLSE, FmhaFwdBatchModeLSEKargs, FmhaFwdEmptyKargs<2>>,
+          std::conditional_t<kDoFp8StaticQuant, FmhaFwdFp8StaticQuantKargs, FmhaFwdEmptyKargs<3>>
+    {
+        ck_tile::index_t batch_stride_q;
+        ck_tile::index_t batch_stride_k;
+        ck_tile::index_t batch_stride_v;
+        ck_tile::index_t batch_stride_o;
+    };
+
+    struct FmhaFwdGroupModeKargs
+        : FmhaFwdCommonKargs,
+          std::conditional_t<kHasBias, FmhaFwdCommonBiasKargs, FmhaFwdEmptyKargs<0>>,
+          std::conditional_t<kHasMask, FmhaFwdMaskKargs, FmhaFwdEmptyKargs<1>>,
+          std::conditional_t<kStoreLSE, FmhaFwdCommonLSEKargs, FmhaFwdEmptyKargs<2>>,
+          std::conditional_t<kDoFp8StaticQuant, FmhaFwdFp8StaticQuantKargs, FmhaFwdEmptyKargs<3>>
+    {
+        const int32_t* seqstart_q_ptr;
+        const int32_t* seqstart_k_ptr;
+        const int32_t* seqlen_k_ptr;
+    };
+
+    using Kargs = std::conditional_t<kIsGroupMode, FmhaFwdGroupModeKargs, FmhaFwdBatchModeKargs>;
+
+    template <bool Cond = !kIsGroupMode>
+    __host__ static constexpr std::enable_if_t<Cond, Kargs>
+    MakeKargs(const void* q_ptr,
+              const void* k_ptr,
+              const void* v_ptr,
+              const void* bias_ptr,
+              void* lse_ptr,
+              void* o_ptr,
+              ck_tile::index_t seqlen_q,
+              ck_tile::index_t seqlen_k,
+              ck_tile::index_t hdim_q,
+              ck_tile::index_t hdim_v,
+              ck_tile::index_t nhead_ratio_qk,
+              float scale_s,
+              float scale_p,
+              float scale_o,
+              ck_tile::index_t stride_q,
+              ck_tile::index_t stride_k,
+              ck_tile::index_t stride_v,
+              ck_tile::index_t stride_bias,
+              ck_tile::index_t stride_o,
+              ck_tile::index_t nhead_stride_q,
+              ck_tile::index_t nhead_stride_k,
+              ck_tile::index_t nhead_stride_v,
+              ck_tile::index_t nhead_stride_bias,
+              ck_tile::index_t nhead_stride_lse,
+              ck_tile::index_t nhead_stride_o,
+              ck_tile::index_t batch_stride_q,
+              ck_tile::index_t batch_stride_k,
+              ck_tile::index_t batch_stride_v,
+              ck_tile::index_t batch_stride_bias,
+              ck_tile::index_t batch_stride_lse,
+              ck_tile::index_t batch_stride_o,
+              ck_tile::index_t window_size_left,
+              ck_tile::index_t window_size_right,
+              ck_tile::index_t mask_type)
+    {
+        Kargs kargs{{q_ptr,
+                     k_ptr,
+                     v_ptr,
+                     o_ptr,
+                     seqlen_q,
+                     seqlen_k,
+                     hdim_q,
+                     hdim_v,
+                     nhead_ratio_qk,
+#if CK_TILE_FMHA_FWD_FAST_EXP2
+                     static_cast<float>(scale_s * ck_tile::log2e_v<>),
+#else
+                     scale_s,
+#endif
+                     stride_q,
+                     stride_k,
+                     stride_v,
+                     stride_o,
+                     nhead_stride_q,
+                     nhead_stride_k,
+                     nhead_stride_v,
+                     nhead_stride_o}, // args for common karg
+                    {},               // placeholder for bias
+                    {},               // placeholder for mask
+                    {},               // placeholder for lse
+                    {},               // placeholder for fp8_static_quant args
+                    batch_stride_q,
+                    batch_stride_k,
+                    batch_stride_v,
+                    batch_stride_o};
+
+        if constexpr(kHasBias)
+        {
+            kargs.bias_ptr          = bias_ptr;
+            kargs.stride_bias       = stride_bias;
+            kargs.nhead_stride_bias = nhead_stride_bias;
+            kargs.batch_stride_bias = batch_stride_bias;
+        }
+        if constexpr(kHasMask)
+        {
+            kargs.window_size_left  = window_size_left;
+            kargs.window_size_right = window_size_right;
+            kargs.mask_type         = static_cast<ck_tile::GenericAttentionMaskEnum>(mask_type);
+        }
+        if constexpr(kStoreLSE)
+        {
+            kargs.lse_ptr          = lse_ptr;
+            kargs.nhead_stride_lse = nhead_stride_lse;
+            kargs.batch_stride_lse = batch_stride_lse;
+        }
+        if constexpr(kDoFp8StaticQuant)
+        {
+            kargs.scale_p = scale_p;
+            kargs.scale_o = scale_o;
+        }
+
+        return kargs;
+    }
+
+    template <bool Cond = kIsGroupMode>
+    __host__ static constexpr std::enable_if_t<Cond, Kargs>
+    MakeKargs(const void* q_ptr,
+              const void* k_ptr,
+              const void* v_ptr,
+              const void* bias_ptr,
+              void* lse_ptr,
+              void* o_ptr,
+              const void* seqstart_q_ptr,
+              const void* seqstart_k_ptr,
+              const void* seqlen_k_ptr,
+              ck_tile::index_t hdim_q,
+              ck_tile::index_t hdim_v,
+              ck_tile::index_t nhead_ratio_qk,
+              float scale_s,
+              float scale_p,
+              float scale_o,
+              ck_tile::index_t stride_q,
+              ck_tile::index_t stride_k,
+              ck_tile::index_t stride_v,
+              ck_tile::index_t stride_bias,
+              ck_tile::index_t stride_o,
+              ck_tile::index_t nhead_stride_q,
+              ck_tile::index_t nhead_stride_k,
+              ck_tile::index_t nhead_stride_v,
+              ck_tile::index_t nhead_stride_bias,
+              ck_tile::index_t nhead_stride_lse,
+              ck_tile::index_t nhead_stride_o,
+              ck_tile::index_t window_size_left,
+              ck_tile::index_t window_size_right,
+              ck_tile::index_t mask_type)
+    {
+        Kargs kargs{{q_ptr,
+                     k_ptr,
+                     v_ptr,
+                     o_ptr,
+                     -1, // seqlen will be updated by another pointer
+                     -1, //
+                     hdim_q,
+                     hdim_v,
+                     nhead_ratio_qk,
+#if CK_TILE_FMHA_FWD_FAST_EXP2
+                     static_cast<float>(scale_s * ck_tile::log2e_v<>),
+#else
+                     scale_s,
+#endif
+                     stride_q,
+                     stride_k,
+                     stride_v,
+                     stride_o,
+                     nhead_stride_q,
+                     nhead_stride_k,
+                     nhead_stride_v,
+                     nhead_stride_o}, // args for common karg
+                    {},               // placeholder for bias
+                    {},               // placeholder for mask
+                    {},               // placeholder for lse
+                    {},               // placeholder for fp8_static_quant args
+                    reinterpret_cast<const int32_t*>(seqstart_q_ptr),
+                    reinterpret_cast<const int32_t*>(seqstart_k_ptr),
+                    reinterpret_cast<const int32_t*>(seqlen_k_ptr)};
+
+        if constexpr(kHasBias)
+        {
+            kargs.bias_ptr          = bias_ptr;
+            kargs.stride_bias       = stride_bias;
+            kargs.nhead_stride_bias = nhead_stride_bias;
+        }
+        if constexpr(kHasMask)
+        {
+            kargs.window_size_left  = window_size_left;
+            kargs.window_size_right = window_size_right;
+            kargs.mask_type         = static_cast<ck_tile::GenericAttentionMaskEnum>(mask_type);
+        }
+        if constexpr(kStoreLSE)
+        {
+            kargs.lse_ptr          = lse_ptr;
+            kargs.nhead_stride_lse = nhead_stride_lse;
+        }
+        if constexpr(kDoFp8StaticQuant)
+        {
+            kargs.scale_p = scale_p;
+            kargs.scale_o = scale_o;
+        }
+
+        return kargs;
+    }
+
+    __host__ static constexpr auto GridSize(ck_tile::index_t batch_size_,
+                                            ck_tile::index_t nhead_,
+                                            ck_tile::index_t seqlen_q_,
+                                            ck_tile::index_t hdim_v_)
+    {
+        return TilePartitioner::GridSize(batch_size_, nhead_, seqlen_q_, hdim_v_);
+    }
+
+    __host__ static constexpr auto BlockSize() { return dim3(kBlockSize); }
+
+    CK_TILE_HOST_DEVICE static constexpr ck_tile::index_t GetSmemSize()
+    {
+        return ck_tile::max(FmhaPipeline::GetSmemSize(), EpiloguePipeline::GetSmemSize());
+    }
+
+    CK_TILE_DEVICE void operator()(Kargs kargs) const
+    {
+        // allocate LDS
+        __shared__ char smem_ptr[GetSmemSize()];
+
+        // divide problem
+        const auto [i_tile_m, i_tile_n, i_nhead, i_batch] =
+            TilePartitioner{}(kargs.seqlen_q, kargs.hdim_v);
+
+        const index_t i_m0 = __builtin_amdgcn_readfirstlane(i_tile_m * FmhaPipeline::kM0);
+        const index_t i_n1 = __builtin_amdgcn_readfirstlane(i_tile_n * FmhaPipeline::kN1);
+
+        long_index_t batch_offset_q    = 0;
+        long_index_t batch_offset_k    = 0;
+        long_index_t batch_offset_v    = 0;
+        long_index_t batch_offset_bias = 0;
+        long_index_t batch_offset_lse  = 0;
+        long_index_t batch_offset_o    = 0;
+
+        if constexpr(kIsGroupMode)
+        {
+            // get starting offset for each batch
+            const long_index_t query_start = kargs.seqstart_q_ptr[i_batch];
+            const long_index_t key_start   = kargs.seqstart_k_ptr[i_batch];
+
+            batch_offset_q = query_start * kargs.stride_q;
+            batch_offset_k = key_start * kargs.stride_k;
+            if constexpr(std::is_same_v<VLayout, ck_tile::tensor_layout::gemm::RowMajor>)
+            {
+                batch_offset_v = key_start * kargs.stride_v;
+            }
+            else
+            {
+                batch_offset_v = key_start;
+            }
+            if constexpr(kHasBias)
+            {
+                batch_offset_bias = query_start * kargs.stride_bias + key_start;
+            }
+            else
+            {
+                batch_offset_bias = key_start;
+            }
+            if constexpr(kStoreLSE)
+            {
+                batch_offset_lse = query_start;
+            }
+            batch_offset_o = query_start * kargs.stride_o;
+
+            // get real # queries & # keys under group mode
+            const auto adjusted_seqstart_q_ptr = kargs.seqstart_q_ptr + i_batch;
+            kargs.seqlen_q = adjusted_seqstart_q_ptr[1] - adjusted_seqstart_q_ptr[0];
+
+            // # of required blocks is different in each groups, terminate unnecessary blocks
+            // earlier
+            if(kargs.seqlen_q <= i_m0)
+            {
+                return;
+            }
+
+            if(kargs.seqlen_k_ptr != nullptr)
+            {
+                kargs.seqlen_k = kargs.seqlen_k_ptr[i_batch];
+            }
+            else
+            {
+                const auto adjusted_seqstart_k_ptr = kargs.seqstart_k_ptr + i_batch;
+                kargs.seqlen_k = adjusted_seqstart_k_ptr[1] - adjusted_seqstart_k_ptr[0];
+            }
+        }
+        else
+        {
+            batch_offset_q = static_cast<long_index_t>(i_batch) * kargs.batch_stride_q;
+            batch_offset_k = static_cast<long_index_t>(i_batch) * kargs.batch_stride_k;
+            batch_offset_v = static_cast<long_index_t>(i_batch) * kargs.batch_stride_v;
+            if constexpr(kHasBias)
+            {
+                batch_offset_bias = static_cast<long_index_t>(i_batch) * kargs.batch_stride_bias;
+            }
+            if constexpr(kStoreLSE)
+            {
+                batch_offset_lse = static_cast<long_index_t>(i_batch) * kargs.batch_stride_lse;
+            }
+            batch_offset_o = static_cast<long_index_t>(i_batch) * kargs.batch_stride_o;
+        }
+
+        // for simplicity, batch stride we just modify the pointer
+        const QDataType* q_ptr = reinterpret_cast<const QDataType*>(kargs.q_ptr) +
+                                 static_cast<long_index_t>(i_nhead) * kargs.nhead_stride_q +
+                                 batch_offset_q;
+        const KDataType* k_ptr =
+            reinterpret_cast<const KDataType*>(kargs.k_ptr) +
+            static_cast<long_index_t>(i_nhead / kargs.nhead_ratio_qk) * kargs.nhead_stride_k +
+            batch_offset_k;
+        const VDataType* v_ptr =
+            reinterpret_cast<const VDataType*>(kargs.v_ptr) +
+            static_cast<long_index_t>(i_nhead / kargs.nhead_ratio_qk) * kargs.nhead_stride_v +
+            batch_offset_v;
+        ODataType* o_ptr = reinterpret_cast<ODataType*>(kargs.o_ptr) +
+                           static_cast<long_index_t>(i_nhead) * kargs.nhead_stride_o +
+                           batch_offset_o;
+
+        // Q/K/V DRAM and DRAM window
+        const auto q_dram = [&]() {
+            const auto q_dram_naive = make_naive_tensor_view<address_space_enum::global>(
+                q_ptr,
+                make_tuple(kargs.seqlen_q, kargs.hdim_q),
+                make_tuple(kargs.stride_q, 1),
+                number<FmhaPipeline::kAlignmentQ>{},
+                number<1>{});
+            if constexpr(FmhaPipeline::kQLoadOnce)
+            {
+                return pad_tensor_view(
+                    q_dram_naive,
+                    make_tuple(number<FmhaPipeline::kM0>{}, number<FmhaPipeline::kK0BlockLength>{}),
+                    sequence<kPadSeqLenQ, kPadHeadDimQ>{});
+            }
+            else
+            {
+                return pad_tensor_view(
+                    q_dram_naive,
+                    make_tuple(number<FmhaPipeline::kM0>{}, number<FmhaPipeline::kK0>{}),
+                    sequence<kPadSeqLenQ, kPadHeadDimQ>{});
+            }
+        }();
+        const auto k_dram = [&]() {
+            const auto k_dram_naive = make_naive_tensor_view<address_space_enum::global>(
+                k_ptr,
+                make_tuple(kargs.seqlen_k, kargs.hdim_q),
+                make_tuple(kargs.stride_k, 1),
+                number<FmhaPipeline::kAlignmentK>{},
+                number<1>{});
+
+            return pad_tensor_view(
+                k_dram_naive,
+                make_tuple(number<FmhaPipeline::kN0>{}, number<FmhaPipeline::kK0>{}),
+                sequence<kPadSeqLenK, kPadHeadDimQ>{});
+        }();
+        const auto v_dram = [&]() {
+            if constexpr(std::is_same_v<VLayout, ck_tile::tensor_layout::gemm::RowMajor>)
+            {
+                const auto v_dram_naive = make_naive_tensor_view<address_space_enum::global>(
+                    v_ptr,
+                    make_tuple(kargs.seqlen_k, kargs.hdim_v),
+                    make_tuple(kargs.stride_v, 1),
+                    number<FmhaPipeline::kAlignmentV>{},
+                    number<1>{});
+
+                const auto v_dram_transposed =
+                    transform_tensor_view(v_dram_naive,
+                                          make_tuple(make_pass_through_transform(kargs.hdim_v),
+                                                     make_pass_through_transform(kargs.seqlen_k)),
+                                          make_tuple(sequence<1>{}, sequence<0>{}),
+                                          make_tuple(sequence<0>{}, sequence<1>{}));
+
+                return pad_tensor_view(
+                    v_dram_transposed,
+                    make_tuple(number<FmhaPipeline::kN1>{}, number<FmhaPipeline::kK1>{}),
+                    sequence<kPadHeadDimV, kPadSeqLenK>{});
+            }
+            else
+            {
+                const auto v_dram_naive = make_naive_tensor_view<address_space_enum::global>(
+                    v_ptr,
+                    make_tuple(kargs.hdim_v, kargs.seqlen_k),
+                    make_tuple(kargs.stride_v, 1),
+                    number<FmhaPipeline::kAlignmentV>{},
+                    number<1>{});
+
+                return pad_tensor_view(
+                    v_dram_naive,
+                    make_tuple(number<FmhaPipeline::kN1>{}, number<FmhaPipeline::kK1>{}),
+                    sequence<kPadHeadDimV, kPadSeqLenK>{});
+            }
+        }();
+
+        auto q_dram_window = make_tile_window(
+            q_dram,
+            [&]() {
+                if constexpr(FmhaPipeline::kQLoadOnce)
+                    return make_tuple(number<FmhaPipeline::kM0>{},
+                                      number<FmhaPipeline::kK0BlockLength>{});
+                else
+                    return make_tuple(number<FmhaPipeline::kM0>{}, number<FmhaPipeline::kK0>{});
+            }(),
+            {i_m0, 0});
+
+        auto k_dram_window = make_tile_window(
+            k_dram, make_tuple(number<FmhaPipeline::kN0>{}, number<FmhaPipeline::kK0>{}), {0, 0});
+
+        auto v_dram_window =
+            make_tile_window(v_dram,
+                             make_tuple(number<FmhaPipeline::kN1>{}, number<FmhaPipeline::kK1>{}),
+                             {i_n1, 0});
+        /// FIXME: Before C++20, capturing structured binding variables are not supported. Remove
+        /// following copy capture of the 'i_nhead' if in C++20
+        const auto bias_dram_window = [&, i_nhead_ = i_nhead]() {
+            constexpr auto bias_dram_window_lengths =
+                make_tuple(number<FmhaPipeline::kM0>{}, number<FmhaPipeline::kN0>{});
+            if constexpr(kHasBias)
+            {
+                const BiasDataType* bias_ptr =
+                    reinterpret_cast<const BiasDataType*>(kargs.bias_ptr) +
+                    static_cast<long_index_t>(i_nhead_) * kargs.nhead_stride_bias +
+                    batch_offset_bias;
+
+                const auto bias_dram = [&]() {
+                    const auto bias_dram_naive = make_naive_tensor_view<address_space_enum::global>(
+                        bias_ptr,
+                        make_tuple(kargs.seqlen_q, kargs.seqlen_k),
+                        make_tuple(kargs.stride_bias, 1),
+                        number<FmhaPipeline::kAlignmentBias>{},
+                        number<1>{});
+
+                    return pad_tensor_view(bias_dram_naive,
+                                           bias_dram_window_lengths,
+                                           sequence<kPadSeqLenQ, kPadSeqLenK>{});
+                }();
+
+                return make_tile_window(bias_dram, bias_dram_window_lengths, {i_m0, 0});
+            }
+            else
+            {
+                return make_null_tile_window(bias_dram_window_lengths);
+            }
+        }();
+
+        // lse
+        auto lse_dram_window = [&, i_nhead_ = i_nhead]() {
+            constexpr auto lse_dram_window_lengths = make_tuple(number<FmhaPipeline::kM0>{});
+            if constexpr(kStoreLSE)
+            {
+                LSEDataType* lse_ptr =
+                    reinterpret_cast<LSEDataType*>(kargs.lse_ptr) +
+                    static_cast<long_index_t>(i_nhead_) * kargs.nhead_stride_lse + batch_offset_lse;
+
+                const auto lse_dram = [&]() {
+                    const auto lse_dram_naive = make_naive_tensor_view<address_space_enum::global>(
+                        lse_ptr,
+                        make_tuple(kargs.seqlen_q),
+                        make_tuple(1),
+                        number<1>{},
+                        number<1>{});
+
+                    return pad_tensor_view(
+                        lse_dram_naive, lse_dram_window_lengths, sequence<kPadSeqLenQ>{});
+                }();
+
+                return make_tile_window(lse_dram, lse_dram_window_lengths, {i_m0});
+            }
+            else
+            {
+                return make_null_tile_window(lse_dram_window_lengths);
+            }
+        }();
+
+        FmhaMask mask = [&]() {
+            if constexpr(kHasMask)
+                return ck_tile::make_generic_attention_mask_from_lr_window<FmhaMask>(
+                    kargs.window_size_left,
+                    kargs.window_size_right,
+                    kargs.seqlen_q,
+                    kargs.seqlen_k,
+                    kargs.mask_type == GenericAttentionMaskEnum::MASK_FROM_TOP_LEFT);
+            else
+                return FmhaMask{kargs.seqlen_q, kargs.seqlen_k};
+        }();
+
+        auto o_acc_tile = [&]() {
+            if constexpr(kDoFp8StaticQuant)
+            {
+                return FmhaPipeline{}(
+                    q_dram_window,
+                    identity{}, // q_element_func
+                    k_dram_window,
+                    identity{}, // k_element_func
+                    v_dram_window,
+                    identity{}, // v_element_func
+                    bias_dram_window,
+                    identity{}, // bias_element_func
+                    lse_dram_window,
+                    identity{},                                          // lse_element_func
+                    identity{},                                          // s_acc_element_func
+                    scales{kargs.scale_p},                               // p_compute_element_func
+                    composes(saturates<fp8_t>{}, scales{kargs.scale_o}), // o_acc_element_func
+                    mask,
+                    kargs.scale_s,
+                    smem_ptr);
+            }
+            else
+            {
+                return FmhaPipeline{}(q_dram_window,
+                                      k_dram_window,
+                                      v_dram_window,
+                                      bias_dram_window,
+                                      lse_dram_window,
+                                      mask,
+                                      kargs.scale_s,
+                                      smem_ptr);
+            }
+        }();
+
+        // O DRAM and O DRAM window
+        auto o_dram = [&]() {
+            const auto o_dram_naive = make_naive_tensor_view<address_space_enum::global>(
+                o_ptr,
+                make_tuple(kargs.seqlen_q, kargs.hdim_v),
+                make_tuple(kargs.stride_o, 1),
+                number<FmhaPipeline::kAlignmentO>{},
+                number<1>{});
+
+            return pad_tensor_view(
+                o_dram_naive,
+                make_tuple(number<FmhaPipeline::kM0>{}, number<FmhaPipeline::kN1>{}),
+                sequence<kPadSeqLenQ, kPadHeadDimV>{});
+        }();
+
+        auto o_dram_window =
+            make_tile_window(o_dram,
+                             make_tuple(number<FmhaPipeline::kM0>{}, number<FmhaPipeline::kN1>{}),
+                             {i_m0, i_n1});
+
+        EpiloguePipeline{}(o_dram_window, o_acc_tile);
+    }
+};
+
+} // namespace ck_tile

include/ck_tile/ops/fmha/kernel/fmha_fwd_tile_partitioner.hpp

+// SPDX-License-Identifier: MIT
+// Copyright (c) 2018-2023, Advanced Micro Devices, Inc. All rights reserved.
+
+#pragma once
+
+#include "ck_tile/core.hpp"
+
+namespace ck_tile {
+
+template <typename BlockFmhaShape_>
+struct FmhaFwdTilePartitioner
+{
+    using BlockFmhaShape = ck_tile::remove_cvref_t<BlockFmhaShape_>;
+
+    static constexpr ck_tile::index_t kM0 = BlockFmhaShape::kM0;
+    static constexpr ck_tile::index_t kN0 = BlockFmhaShape::kN0;
+    static constexpr ck_tile::index_t kK0 = BlockFmhaShape::kK0;
+    static constexpr ck_tile::index_t kN1 = BlockFmhaShape::kN1;
+    static constexpr ck_tile::index_t kK1 = BlockFmhaShape::kK1;
+
+    __host__ static constexpr auto GridSize(ck_tile::index_t batch_size_,
+                                            ck_tile::index_t nhead_,
+                                            ck_tile::index_t seqlen_q_,
+                                            ck_tile::index_t hdim_v_)
+    {
+        // TODO: this may need tuning
+        return dim3(ck_tile::integer_divide_ceil(seqlen_q_, kM0) *
+                        ck_tile::integer_divide_ceil(hdim_v_, kN1),
+                    nhead_,
+                    batch_size_);
+    }
+
+    CK_TILE_DEVICE auto operator()(ck_tile::index_t /*seqlen_q*/, ck_tile::index_t hdim_v)
+    {
+        // const index_t num_tile_m0 = seqlen_q / kM0;
+        const index_t num_tile_n1 = ck_tile::integer_divide_ceil(hdim_v, kN1);
+
+        const index_t i_block = blockIdx.x;
+        const index_t i_nhead = blockIdx.y;
+        const index_t i_batch = blockIdx.z;
+
+        const auto f = [](index_t dividend, index_t divisor) {
+            index_t quotient = dividend / divisor;
+            index_t modulus  = dividend - quotient * divisor;
+            return ck_tile::make_tuple(quotient, modulus);
+        };
+
+        const auto [i_tile_m, i_tile_n] = f(i_block, num_tile_n1);
+
+        return ck_tile::make_tuple(i_tile_m, i_tile_n, i_nhead, i_batch);
+    }
+};
+
+} // namespace ck_tile

include/ck_tile/ops/fmha/pipeline/block_fmha_pipeline_enum.hpp

+// SPDX-License-Identifier: MIT
+// Copyright (c) 2018-2024, Advanced Micro Devices, Inc. All rights reserved.
+
+#pragma once
+
+namespace ck_tile {
+
+// This class is used for codegen pattern matching
+enum class BlockFmhaPipelineEnum
+{
+    QRKSVS = 0,
+    QRKSVS_ASYNC,
+    QSKSVS,
+};
+
+} // namespace ck_tile

include/ck_tile/ops/fmha/pipeline/block_fmha_pipeline_problem.hpp

+// SPDX-License-Identifier: MIT
+// Copyright (c) 2018-2023, Advanced Micro Devices, Inc. All rights reserved.
+
+#pragma once
+
+#include "ck_tile/core.hpp"
+
+namespace ck_tile {
+
+template <typename QDataType_,
+          typename KDataType_,
+          typename VDataType_,
+          typename SaccDataType_,
+          typename SMPLComputeDataType_,
+          typename BiasDataType_,
+          typename LSEDataType_,
+          typename PDataType_,
+          typename OaccDataType_,
+          typename ODataType_,
+          typename BlockFmhaShape_,
+          bool kIsGroupMode_,
+          typename FmhaMask_,
+          typename Traits_>
+struct BlockFmhaPipelineProblem
+{
+    using QDataType           = remove_cvref_t<QDataType_>;
+    using KDataType           = remove_cvref_t<KDataType_>;
+    using VDataType           = remove_cvref_t<VDataType_>;
+    using SaccDataType        = remove_cvref_t<SaccDataType_>;
+    using SMPLComputeDataType = remove_cvref_t<SMPLComputeDataType_>;
+    using BiasDataType        = remove_cvref_t<BiasDataType_>;
+    using LSEDataType         = remove_cvref_t<LSEDataType_>;
+    using PDataType           = remove_cvref_t<PDataType_>;
+    using OaccDataType        = remove_cvref_t<OaccDataType_>;
+    using ODataType           = remove_cvref_t<ODataType_>;
+    using BlockFmhaShape      = remove_cvref_t<BlockFmhaShape_>;
+    using FmhaMask            = remove_cvref_t<FmhaMask_>;
+    using Traits              = remove_cvref_t<Traits_>;
+
+    static constexpr index_t kBlockSize = BlockFmhaShape::NumWarps * get_warp_size();
+    static constexpr bool kIsGroupMode  = kIsGroupMode_;
+
+    // attributes from traits
+    static constexpr bool kPadSeqLenQ       = Traits::kPadSeqLenQ;
+    static constexpr bool kPadSeqLenK       = Traits::kPadSeqLenK;
+    static constexpr bool kPadHeadDimQ      = Traits::kPadHeadDimQ;
+    static constexpr bool kPadHeadDimV      = Traits::kPadHeadDimV;
+    static constexpr bool kHasBias          = Traits::kHasBias;
+    static constexpr bool kStoreLSE         = Traits::kStoreLSE;
+    static constexpr bool kDoFp8StaticQuant = Traits::kDoFp8StaticQuant;
+    static constexpr index_t kBlockPerCu    = Traits::kBlockPerCu;
+    static constexpr bool kIsFp8 =
+        (std::is_same_v<QDataType, fp8_t> || std::is_same_v<QDataType, bf8_t>)&&(
+            std::is_same_v<KDataType, fp8_t> ||
+            std::is_same_v<KDataType, bf8_t>)&&(std::is_same_v<VDataType, fp8_t> ||
+                                                std::is_same_v<VDataType, bf8_t>)&&std::
+            is_same_v<SaccDataType, float> &&
+        std::is_same_v<OaccDataType, float>;
+};
+
+} // namespace ck_tile