/*-
 *   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.
 *     * Neither the name of Intel Corporation nor the names of its
 *       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
 *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef NVMF_FABRIC_INTF_H
#define NVMF_FABRIC_INTF_H

#include <stdint.h>

#include "spdk/event.h"
#include "nvmf_internal.h"
#include "spdk/queue.h"

/* RDMA transport connection states */
enum conn_state {
	CONN_STATE_INVALID = 0,
	CONN_STATE_RUNNING = 1,
	CONN_STATE_FABRIC_DISCONNECT = 2,
	CONN_STATE_OVERFLOW = 3,
	CONN_STATE_EXITING = 4,
};

enum conn_type {
	CONN_TYPE_AQ = 0,
	CONN_TYPE_IOQ = 1,
};

struct spdk_nvmf_conn {
	uint32_t			is_valid;

	struct nvmf_session		*sess;


	/*
	 * values saved from fabric connect and private data
	 */
	uint8_t				responder_resources;
	uint8_t				initiator_depth;
	uint16_t			sq_depth;
	uint16_t			cq_depth;
	uint16_t			qid;
	uint16_t			cntlid;

	enum conn_type			type;
	volatile enum conn_state	state;

	uint16_t			sq_head;
	uint16_t			sq_tail;

	struct rdma_cm_id		*cm_id;
	struct ibv_context		*ctx;
	struct ibv_comp_channel		*comp_channel;
	struct ibv_cq			*cq;
	struct ibv_qp			*qp;

	uint8_t				pending_rdma_read_count;
	STAILQ_HEAD(qp_pending_desc, nvme_qp_tx_desc)	qp_pending_desc;

	STAILQ_HEAD(qp_rx_desc, nvme_qp_rx_desc)	qp_rx_desc;
	STAILQ_HEAD(qp_tx_desc, nvme_qp_tx_desc)	qp_tx_desc;
	STAILQ_HEAD(qp_tx_active_desc, nvme_qp_tx_desc)	qp_tx_active_desc;

	TAILQ_ENTRY(spdk_nvmf_conn) link;
	struct spdk_poller		poller;
};

int spdk_initialize_nvmf_conns(int max_connections);

void spdk_shutdown_nvmf_conns(void);

struct spdk_nvmf_conn *
spdk_nvmf_allocate_conn(void);

int spdk_nvmf_startup_conn(struct spdk_nvmf_conn *conn);

struct spdk_nvmf_conn *
spdk_find_nvmf_conn_by_cm_id(struct rdma_cm_id *cm_id);

#endif /* NVMF_FABRIC_INTF_H */