/*-
 *   BSD LICENSE
 *
 *   Copyright (c) Intel Corporation.
 *   All rights reserved.
 *
 *   Redistribution and use in source and binary forms, with or without
 *   modification, are permitted provided that the following conditions
 *   are met:
 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in
 *       the documentation and/or other materials provided with the
 *       distribution.
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 *       contributors may be used to endorse or promote products derived
 *       from this software without specific prior written permission.
 *
 *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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 *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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 *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef SPDK_NVMF_TRANSPORT_H
#define SPDK_NVMF_TRANSPORT_H

#include <stdint.h>

struct nvmf_session;
struct spdk_nvmf_conn;
struct spdk_nvmf_request;
struct spdk_nvmf_discovery_log_page_entry;
struct spdk_nvmf_listen_addr;
struct spdk_nvmf_request;

struct spdk_nvmf_transport {
	/**
	 * Name of the transport.
	 */
	const char *name;

	/**
	 * Initialize the transport.
	 */
	int (*transport_init)(uint16_t max_queue_depth, uint32_t max_io_size,
			      uint32_t in_capsule_data_size);

	/**
	 * Shut down the transport.
	 */
	int (*transport_fini)(void);

	/**
	 * Start accepting connections on the transport.
	 */
	int (*acceptor_init)(void);

	/**
	 * Check for new connections on the transport.
	 */
	void (*acceptor_poll)(void);

	/**
	 * Stop accepting connections on the transport.
	 */
	void (*acceptor_fini)(void);

	/**
	 * Initialize the transport for the given session
	 */
	int (*session_init)(struct nvmf_session *session, struct spdk_nvmf_conn *conn);

	/**
	 * Deinitiallize the transport for the given session
	 */
	void (*session_fini)(struct nvmf_session *session);

	/*
	 * Signal request completion, which sends a response
	 * to the originator. A request can either
	 * be completed or released, but not both.
	 */
	int (*req_complete)(struct spdk_nvmf_request *req);

	/*
	 * Signal that the request can be released without sending
	 * a response. A request can either be completed or release,
	 * but not both.
	 */
	int (*req_release)(struct spdk_nvmf_request *req);

	/*
	 * Deinitialize a connection.
	 */
	void (*conn_fini)(struct spdk_nvmf_conn *conn);

	/*
	 * Poll a connection for events.
	 */
	int (*conn_poll)(struct spdk_nvmf_conn *conn);

	/**
	 * Fill out a discovery log entry for a specific listen address.
	 */
	void (*listen_addr_discover)(struct spdk_nvmf_listen_addr *listen_addr,
				     struct spdk_nvmf_discovery_log_page_entry *entry);
};

int spdk_nvmf_transport_init(void);
int spdk_nvmf_transport_fini(void);
const struct spdk_nvmf_transport *spdk_nvmf_transport_get(const char *name);

int spdk_nvmf_acceptor_init(void);
void spdk_nvmf_acceptor_poll(void);
void spdk_nvmf_acceptor_fini(void);

extern const struct spdk_nvmf_transport spdk_nvmf_transport_rdma;

#endif /* SPDK_NVMF_TRANSPORT_H */