mctp_i3c_target.h

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/*
 * Copyright (c) 2025 Intel Corporation
 *
 * SPDX-License-Identifier: Apache-2.0
 *
 */
 
#ifndef ZEPHYR_MCTP_I3C_TARGET_H_
#define ZEPHYR_MCTP_I3C_TARGET_H_
 
#include <stdint.h>
#include <zephyr/kernel.h>
#include <zephyr/device.h>
#include <zephyr/drivers/i3c.h>
#include <zephyr/pmci/mctp/mctp_i3c_common.h>
#include <libmctp.h>

struct mctp_binding_i3c_target {
        struct mctp_binding binding;
        const struct device *i3c;
        struct i3c_target_config i3c_target_cfg;
        uint8_t endpoint_id;
        struct mctp_pktbuf *tx_pkt;
        struct k_sem *tx_lock;
        struct k_sem *tx_complete;
        struct mctp_pktbuf *rx_pkt;
        uint8_t tx_storage[MCTP_PKTBUF_SIZE(MCTP_I3C_MAX_PKT_SIZE)] PKTBUF_STORAGE_ALIGN;
};

extern const struct i3c_target_callbacks mctp_i3c_target_callbacks;
int mctp_i3c_target_start(struct mctp_binding *binding);
int mctp_i3c_target_tx(struct mctp_binding *binding, struct mctp_pktbuf *pkt);

#define MCTP_I3C_TARGET_DT_DEFINE(_name, _node_id)                                                 \
        K_SEM_DEFINE(_name##_tx_lock, 1, 1);                                                       \
        K_SEM_DEFINE(_name##_tx_complete, 0, 1);                                                   \
        struct mctp_binding_i3c_target _name = {                                                   \
                .binding = {                                                                       \
                        .name = STRINGIFY(_name), .version = 1,                                    \
                        .start = mctp_i3c_target_start,                                            \
                        .tx = mctp_i3c_target_tx,                                                  \
                        .pkt_size = MCTP_I3C_MAX_PKT_SIZE,                                         \
                        .tx_storage = _name.tx_storage,                                            \
                },                                                                                 \
                .i3c = DEVICE_DT_GET(DT_PHANDLE(_node_id, i3c)),                                   \
                .i3c_target_cfg = {                                                                \
                        .callbacks = &mctp_i3c_target_callbacks,                                   \
                },                                                                                 \
                .endpoint_id = DT_PROP(_node_id, endpoint_id),                                     \
                .tx_lock = &_name##_tx_lock,                                                       \
                .tx_complete = &_name##_tx_complete,                                               \
        };
 
#endif /* ZEPHYR_MCTP_I3C_TARGET_H_ */