280 lines
8.5 KiB
Plaintext
280 lines
8.5 KiB
Plaintext
/*
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* Copyright (c) 2024 by FlashInfer team.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef FLASHINFER_DECODE_PARAMS_CUH_
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#define FLASHINFER_DECODE_PARAMS_CUH_
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#include <cuda_runtime.h>
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#include <cstdint>
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#include "../layout.cuh"
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#include "../page.cuh"
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namespace flashinfer {
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template <typename DTypeQ_, typename DTypeKV_, typename DTypeO_>
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struct SingleDecodeParams {
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using DTypeQ = DTypeQ_;
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using DTypeKV = DTypeKV_;
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using DTypeO = DTypeO_;
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using IdType = int32_t;
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DTypeQ* q;
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DTypeKV* k;
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DTypeKV* v;
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DTypeO* o;
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float* lse;
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float* maybe_alibi_slopes;
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uint32_t kv_len;
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uint32_t num_qo_heads;
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uint32_t num_kv_heads;
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uint32_t q_stride_n;
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uint32_t q_stride_h;
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uint32_t kv_stride_n;
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uint32_t kv_stride_h;
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int32_t window_left;
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float logits_soft_cap;
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float sm_scale;
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float rope_rcp_scale;
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float rope_rcp_theta;
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uint32_t kv_chunk_size;
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__device__ __host__ SingleDecodeParams()
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: q(nullptr),
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k(nullptr),
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v(nullptr),
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o(nullptr),
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lse(nullptr),
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maybe_alibi_slopes(nullptr),
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kv_len(0),
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num_qo_heads(0),
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num_kv_heads(0),
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q_stride_n(0),
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q_stride_h(0),
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kv_stride_n(0),
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kv_stride_h(0),
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window_left(0),
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logits_soft_cap(0.0f),
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sm_scale(0.0f),
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rope_rcp_scale(0.0f),
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rope_rcp_theta(0.0f),
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kv_chunk_size(0) {}
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__device__ __host__ SingleDecodeParams(DTypeQ* q, DTypeKV* k, DTypeKV* v, DTypeO* o,
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float* maybe_alibi_slopes, uint32_t seq_len,
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uint32_t num_qo_heads, uint32_t num_kv_heads,
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QKVLayout kv_layout, uint32_t head_dim,
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int32_t window_left, float logits_soft_cap, float sm_scale,
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float rope_scale, float rope_theta)
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: q(q),
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k(k),
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v(v),
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o(o),
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lse(nullptr),
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maybe_alibi_slopes(maybe_alibi_slopes),
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kv_len(seq_len),
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num_qo_heads(num_qo_heads),
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num_kv_heads(num_kv_heads),
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q_stride_n(num_qo_heads * head_dim),
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q_stride_h(head_dim),
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kv_stride_n((kv_layout == QKVLayout::kNHD) ? num_kv_heads * head_dim : head_dim),
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kv_stride_h((kv_layout == QKVLayout::kNHD) ? head_dim : seq_len * head_dim),
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window_left(window_left),
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logits_soft_cap(logits_soft_cap),
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sm_scale(sm_scale),
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rope_rcp_scale(1.f / rope_scale),
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rope_rcp_theta(1.f / rope_theta),
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kv_chunk_size(0) {}
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__host__ __device__ __forceinline__ uint32_t get_qo_len(uint32_t batch_idx) const { return 1; }
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__host__ __device__ __forceinline__ uint32_t get_kv_len(uint32_t batch_idx) const {
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return kv_len;
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}
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};
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template <typename DTypeQ_, typename DTypeKV_, typename DTypeO_, typename IdType_>
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struct BatchDecodeParams {
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using DTypeQ = DTypeQ_;
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using DTypeKV = DTypeKV_;
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using DTypeO = DTypeO_;
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using IdType = IdType_;
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DTypeQ* q;
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IdType* q_rope_offset;
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paged_kv_t<DTypeKV, IdType> paged_kv;
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DTypeO* o;
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float* lse;
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float* maybe_alibi_slopes;
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uint32_t padded_batch_size;
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uint32_t num_qo_heads;
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IdType q_stride_n;
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IdType q_stride_h;
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int32_t window_left;
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float logits_soft_cap;
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float sm_scale;
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float rope_rcp_scale;
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float rope_rcp_theta;
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IdType* request_indices;
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IdType* kv_tile_indices;
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IdType* o_indptr;
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IdType* kv_chunk_size_ptr;
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bool* block_valid_mask;
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bool partition_kv;
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__device__ __host__ BatchDecodeParams()
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: q(nullptr),
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q_rope_offset(nullptr),
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paged_kv(),
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o(nullptr),
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lse(nullptr),
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maybe_alibi_slopes(nullptr),
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padded_batch_size(0),
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num_qo_heads(0),
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q_stride_n(0),
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q_stride_h(0),
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window_left(0),
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logits_soft_cap(0.0f),
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sm_scale(0.0f),
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rope_rcp_scale(0.0f),
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rope_rcp_theta(0.0f),
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request_indices(nullptr),
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kv_tile_indices(nullptr),
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o_indptr(nullptr),
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kv_chunk_size_ptr(nullptr),
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block_valid_mask(nullptr),
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partition_kv(false) {}
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__device__ __host__ BatchDecodeParams(DTypeQ* q, IdType* q_rope_offset,
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paged_kv_t<DTypeKV, IdType> paged_kv, DTypeO* o, float* lse,
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float* maybe_alibi_slopes, uint32_t num_qo_heads,
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IdType q_stride_n, IdType q_stride_h, int32_t window_left,
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float logits_soft_cap, float sm_scale, float rope_scale,
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float rope_theta)
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: q(q),
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q_rope_offset(q_rope_offset),
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paged_kv(paged_kv),
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o(o),
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lse(lse),
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maybe_alibi_slopes(maybe_alibi_slopes),
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padded_batch_size(0),
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num_qo_heads(num_qo_heads),
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q_stride_n(q_stride_n),
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q_stride_h(q_stride_h),
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window_left(window_left),
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logits_soft_cap(logits_soft_cap),
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sm_scale(sm_scale),
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rope_rcp_scale(1.f / rope_scale),
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rope_rcp_theta(1.f / rope_theta),
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request_indices(nullptr),
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kv_tile_indices(nullptr),
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o_indptr(nullptr),
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kv_chunk_size_ptr(nullptr),
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block_valid_mask(nullptr),
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partition_kv(false) {}
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__host__ __device__ __forceinline__ int32_t get_qo_len(int32_t batch_idx) const { return 1; }
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__host__ __device__ __forceinline__ int32_t get_kv_len(int32_t batch_idx) const {
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return paged_kv.get_length(batch_idx);
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}
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};
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template <typename DTypeQ_, typename DTypeKV_, typename DTypeO_, typename IdType_>
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struct BatchDecodeParamsMLA {
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using DTypeQ = DTypeQ_;
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using DTypeKV = DTypeKV_;
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using DTypeO = DTypeO_;
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using IdType = IdType_;
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DTypeQ* q_nope;
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DTypeQ* q_pe;
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DTypeO* o;
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float* lse;
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float sm_scale;
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IdType* q_rope_offset;
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paged_kv_mla_t<DTypeKV, IdType> paged_kv;
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uint32_t padded_batch_size;
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uint32_t num_qo_heads;
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int32_t window_left;
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float logits_soft_cap;
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float rope_rcp_scale;
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float rope_rcp_theta;
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IdType* request_indices;
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IdType* kv_tile_indices;
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IdType* o_indptr;
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IdType* kv_chunk_size_ptr;
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bool* block_valid_mask;
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bool partition_kv;
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__device__ __host__ BatchDecodeParamsMLA()
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: q_nope(nullptr),
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q_pe(nullptr),
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o(nullptr),
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lse(nullptr),
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sm_scale(0.0f),
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q_rope_offset(nullptr),
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paged_kv(),
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padded_batch_size(0),
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num_qo_heads(0),
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window_left(0),
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logits_soft_cap(0.0f),
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rope_rcp_scale(0.0f),
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rope_rcp_theta(0.0f),
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request_indices(nullptr),
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kv_tile_indices(nullptr),
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o_indptr(nullptr),
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kv_chunk_size_ptr(nullptr),
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block_valid_mask(nullptr),
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partition_kv(false) {}
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__device__ __host__ BatchDecodeParamsMLA(DTypeQ* q_nope, DTypeQ* q_pe, IdType* q_rope_offset,
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paged_kv_mla_t<DTypeKV, IdType> paged_kv, DTypeO* o,
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float* lse, uint32_t num_qo_heads, int32_t window_left,
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float logits_soft_cap, float sm_scale, float rope_scale,
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float rope_theta)
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: q_nope(q_nope),
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q_pe(q_pe),
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o(o),
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lse(lse),
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sm_scale(sm_scale),
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q_rope_offset(q_rope_offset),
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paged_kv(paged_kv),
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padded_batch_size(0),
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num_qo_heads(num_qo_heads),
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window_left(window_left),
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logits_soft_cap(logits_soft_cap),
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rope_rcp_scale(1.f / rope_scale),
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rope_rcp_theta(1.f / rope_theta),
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request_indices(nullptr),
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kv_tile_indices(nullptr),
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o_indptr(nullptr),
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kv_chunk_size_ptr(nullptr),
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block_valid_mask(nullptr),
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partition_kv(false) {}
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__host__ __device__ __forceinline__ int32_t get_qo_len(int32_t batch_idx) const { return 1; }
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__host__ __device__ __forceinline__ int32_t get_kv_len(int32_t batch_idx) const {
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return paged_kv.get_length(batch_idx);
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}
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};
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} // namespace flashinfer
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#endif // FLASHINFER_DECODE_PARAMS_CUH_
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