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/*
* Copyright (c) 2023-2024 The ggml authors
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
#pragma once
#include "ggml-backend.h"
#include "ggml.h"
#ifdef __cplusplus
extern "C" {
#endif
/**
* @brief Maximum number of CANN devices supported.
*/
#define GGML_CANN_MAX_DEVICES 16
GGML_BACKEND_API ggml_backend_reg_t ggml_backend_cann_reg(void);
/**
* @brief Initializes the CANN backend for a specified device.
*
* This function initializes the CANN backend for the given device.
* It verifies the device index, allocates a context, and creates a backend
* instance.
*
* @param device The index of the device to initialize.
* @return A pointer to the initialized backend instance, or nullptr on failure.
*/
GGML_BACKEND_API ggml_backend_t ggml_backend_cann_init(int32_t device);
/**
* @brief Checks if a given backend is a CANN backend.
*
* This function verifies if the provided backend is a CANN backend by comparing
* its GUID with the CANN backend's GUID.
*
* @param backend The backend instance to check.
* @return True if the backend is a CANN backend, false otherwise.
*/
GGML_BACKEND_API bool ggml_backend_is_cann(ggml_backend_t backend);
/**
* @brief Retrieves the CANN buffer type for a specified device.
*
* This function initializes and returns the buffer type interface associated
* with the given device. It ensures thread-safe access using a mutex.
*
* @param device The device index for which to retrieve the buffer type.
* @return A pointer to the buffer type interface for the specified device, or
* nullptr if the device index is out of range.
*/
GGML_BACKEND_API ggml_backend_buffer_type_t
ggml_backend_cann_buffer_type(int32_t device);
/**
* @brief Retrieves the number of CANN devices available.
*
* This function returns the number of CANN devices available based on
* information obtained from `ggml_cann_info()`.
*
* @return The number of CANN devices available.
*/
GGML_BACKEND_API int32_t ggml_backend_cann_get_device_count(void);
/**
* @brief pinned host buffer for use with the CPU backend for faster copies between CPU and NPU.
*
* @return A pointer to the host buffer type interface.
*/
GGML_BACKEND_API ggml_backend_buffer_type_t ggml_backend_cann_host_buffer_type(void);
/**
* @brief Retrieves the description of a specific CANN device.
*
* This function sets the specified device, retrieves the SoC name,
* and writes it into the provided description buffer.
*
* @param device The device index to retrieve the description for.
* @param description Pointer to a buffer where the description will be written.
* @param description_size Size of the description buffer.
*/
GGML_BACKEND_API void ggml_backend_cann_get_device_description(
int32_t device, char* description, size_t description_size);
/**
* @brief Retrieves the memory information of a specific CANN device.
*
* This function sets the specified device, retrieves the free and total
* memory information of the specified type (ACL_HBM_MEM), and stores them
* in the provided pointers.
*
* @param device The device index to retrieve memory information for.
* @param free Pointer to a variable where the free memory size will be stored.
* @param total Pointer to a variable where the total memory size will be
* stored.
*/
GGML_BACKEND_API void ggml_backend_cann_get_device_memory(int32_t device,
size_t* free,
size_t* total);
#ifdef __cplusplus
}
#endif
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