#pragma once

#include <torch/extension.h>

void paged_attention_v1(
  torch::Tensor& out,
  torch::Tensor& query,
  torch::Tensor& key_cache,
  torch::Tensor& value_cache,
  int num_kv_heads,
  float scale,
  torch::Tensor& block_tables,
  torch::Tensor& context_lens,
  int block_size,
  int max_context_len,
  const c10::optional<torch::Tensor>& alibi_slopes,
  const std::string& kv_cache_dtype,
  float kv_scale);

void paged_attention_v2(
  torch::Tensor& out,
  torch::Tensor& exp_sums,
  torch::Tensor& max_logits,
  torch::Tensor& tmp_out,
  torch::Tensor& query,
  torch::Tensor& key_cache,
  torch::Tensor& value_cache,
  int num_kv_heads,
  float scale,
  torch::Tensor& block_tables,
  torch::Tensor& context_lens,
  int block_size,
  int max_context_len,
  const c10::optional<torch::Tensor>& alibi_slopes,
  const std::string& kv_cache_dtype,
  float kv_scale);

void rms_norm(
  torch::Tensor& out,
  torch::Tensor& input,
  torch::Tensor& weight,
  float epsilon);

void fused_add_rms_norm(
  torch::Tensor& input,
  torch::Tensor& residual,
  torch::Tensor& weight,
  float epsilon);

void rotary_embedding(
  torch::Tensor& positions,
  torch::Tensor& query,
  torch::Tensor& key,
  int head_size,
  torch::Tensor& cos_sin_cache,
  bool is_neox);

void batched_rotary_embedding(
  torch::Tensor& positions,
  torch::Tensor& query,
  torch::Tensor& key,
  int head_size,
  torch::Tensor& cos_sin_cache,
  bool is_neox,
  int rot_dim,
  torch::Tensor& cos_sin_cache_offsets);

void silu_and_mul(
  torch::Tensor& out,
  torch::Tensor& input);

void gelu_and_mul(
  torch::Tensor& out,
  torch::Tensor& input);

void gelu_tanh_and_mul(
  torch::Tensor& out,
  torch::Tensor& input);

void gelu_new(
  torch::Tensor& out,
  torch::Tensor& input);

void gelu_fast(
  torch::Tensor& out,
  torch::Tensor& input);


void moe_align_block_size(
  torch::Tensor topk_ids,
  int num_experts,
  int block_size,
  torch::Tensor sorted_token_ids,
  torch::Tensor expert_ids,
  torch::Tensor num_tokens_post_pad
);

#ifndef USE_ROCM
using fptr_t = uint64_t;
fptr_t init_custom_ar(torch::Tensor &meta, torch::Tensor &rank_data,
                    const std::vector<std::string> &handles,
                    const std::vector<int64_t> &offsets, int rank,
                    bool full_nvlink);
bool should_custom_ar(torch::Tensor &inp, int max_size, int world_size,
                      bool full_nvlink);
void all_reduce_reg(fptr_t _fa, torch::Tensor &inp, torch::Tensor &out);
void all_reduce_unreg(fptr_t _fa, torch::Tensor &inp, torch::Tensor &reg_buffer,
                      torch::Tensor &out);
void dispose(fptr_t _fa);
int meta_size();
void register_buffer(fptr_t _fa, torch::Tensor &t,
                     const std::vector<std::string> &handles,
                     const std::vector<int64_t> &offsets);
std::pair<std::vector<uint8_t>, std::vector<int64_t>> get_graph_buffer_ipc_meta(fptr_t _fa);
void register_graph_buffers(fptr_t _fa, const std::vector<std::string> &handles,
                            const std::vector<std::vector<int64_t>> &offsets);
#endif