llama.cpp/ggml/include/ggml-sycl.h

//
//  MIT license
//  Copyright (C) 2024 Intel Corporation
//  SPDX-License-Identifier: MIT
//

#pragma once

#include "ggml.h"
#include "ggml-backend.h"

#define GGML_SYCL_NAME "SYCL"
#define GGML_SYCL_MAX_DEVICES 48

#ifdef  __cplusplus
extern "C" {
#endif

// backend API
GGML_BACKEND_API ggml_backend_t ggml_backend_sycl_init(int device);

GGML_BACKEND_API bool ggml_backend_is_sycl(ggml_backend_t backend);

// devide buffer
GGML_BACKEND_API ggml_backend_buffer_type_t ggml_backend_sycl_buffer_type(int device);

// split tensor buffer that splits matrices by rows across multiple devices
GGML_BACKEND_API ggml_backend_buffer_type_t ggml_backend_sycl_split_buffer_type(const float * tensor_split);

// Tensor parallelism (--split-mode tensor): comm_init/free/allreduce_tensor
// trio queried by the meta-backend via ggml_backend_reg_get_proc_address.
// See typedefs in ggml/include/ggml-backend.h. Mirrors the CUDA backend's
// pattern (ggml_backend_cuda_comm_*).
GGML_BACKEND_API void * ggml_backend_sycl_comm_init(ggml_backend_t * backends, size_t n_backends);
GGML_BACKEND_API void   ggml_backend_sycl_comm_free(void * comm_ctx);
GGML_BACKEND_API bool   ggml_backend_sycl_comm_allreduce_tensor(void * comm_ctx, struct ggml_tensor ** tensors);

// pinned host buffer for use with the CPU backend for faster copies between CPU and GPU
GGML_BACKEND_API ggml_backend_buffer_type_t ggml_backend_sycl_host_buffer_type(void);

GGML_BACKEND_API void ggml_backend_sycl_print_sycl_devices(void);
GGML_BACKEND_API void ggml_backend_sycl_get_gpu_list(int *id_list, int max_len);
GGML_BACKEND_API void ggml_backend_sycl_get_device_description(int device,
                                                       char *description,
                                                       size_t description_size);
GGML_BACKEND_API int  ggml_backend_sycl_get_device_count();
GGML_BACKEND_API void ggml_backend_sycl_get_device_memory(int device, size_t *free, size_t *total);

// SYCL doesn't support registering host memory, keep here for reference
// GGML_BACKEND_API bool ggml_backend_sycl_register_host_buffer(void * buffer, size_t size);
// GGML_BACKEND_API void ggml_backend_sycl_unregister_host_buffer(void * buffer);

GGML_BACKEND_API ggml_backend_reg_t ggml_backend_sycl_reg(void);

#ifdef  __cplusplus
}
#endif