mpipe_buffer.h

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/*
 * Copyright 2025-2026 NXP
 *
 * SPDX-License-Identifier: Apache-2.0
 */

 
#ifndef ZEPHYR_INCLUDE_MPIPE_MPIPE_BUFFER_H_
#define ZEPHYR_INCLUDE_MPIPE_MPIPE_BUFFER_H_

 
#include <stdbool.h>
#include <stdint.h>
 
#include <zephyr/net_buf.h>

struct mpipe_buffer_pool_config {
        uint32_t size;
        uint16_t align;
        uint8_t min_buffers;
        uint8_t max_buffers;
};
 
struct mpipe_structure;

struct mpipe_buffer_pool {
        struct mpipe_buffer_pool_config req_config;
        struct mpipe_buffer_pool_config config;
        struct net_buf_pool *nb_pool;

        int (*configure)(struct mpipe_buffer_pool *pool, const struct mpipe_structure *config);
        int (*set_config)(struct mpipe_buffer_pool *pool,
                          const struct mpipe_buffer_pool_config *cfg);
        int (*start)(struct mpipe_buffer_pool *pool);
        int (*stop)(struct mpipe_buffer_pool *pool);
        int (*acquire_buffer)(struct mpipe_buffer_pool *pool, struct net_buf **buf);
        int (*release_buffer)(struct mpipe_buffer_pool *pool, struct net_buf *buf);

        bool started;
};

struct mpipe_buffer_meta {
        struct mpipe_buffer_pool *pool;
        uint32_t bytes_used;
        uint32_t timestamp;
        void *driver_buf;
        void *priv;
};

static inline struct mpipe_buffer_meta *mpipe_buffer_get_meta(const struct net_buf *buf)
{
        return (struct mpipe_buffer_meta *)net_buf_user_data(buf);
}

void mpipe_buffer_destroy(struct net_buf *buf);

int mpipe_buffer_pool_configure(struct mpipe_buffer_pool *pool,
                                const struct mpipe_structure *config);

int mpipe_buffer_pool_set_req_config(struct mpipe_buffer_pool *pool,
                                     const struct mpipe_buffer_pool_config *cfg);

int mpipe_buffer_pool_set_config(struct mpipe_buffer_pool *pool,
                                 const struct mpipe_buffer_pool_config *cfg);

int mpipe_buffer_pool_start(struct mpipe_buffer_pool *pool);

int mpipe_buffer_pool_stop(struct mpipe_buffer_pool *pool);

void mpipe_buffer_pool_init(struct mpipe_buffer_pool *pool);

 
#endif /* ZEPHYR_INCLUDE_MPIPE_MPIPE_BUFFER_H_ */