/*-
 *   BSD LICENSE
 *
 *   Copyright (c) Intel Corporation.
 *   All rights reserved.
 *
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 *   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,
 *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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 *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef NVMF_SESSION_H
#define NVMF_SESSION_H

#include <stdint.h>
#include <stdbool.h>

#include "spdk/nvmf_spec.h"
#include "spdk/queue.h"

/* define a virtual controller limit to the number of QPs supported */
#define MAX_SESSION_IO_QUEUES 64

struct spdk_nvmf_transport;
struct spdk_nvmf_request;

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

struct spdk_nvmf_conn {
	const struct spdk_nvmf_transport	*transport;
	struct spdk_nvmf_session		*sess;
	enum conn_type				type;

	uint16_t				sq_head;
	uint16_t				sq_head_max;

	TAILQ_ENTRY(spdk_nvmf_conn) 		link;
};

/*
 * This structure maintains the NVMf virtual controller session
 * state. Each NVMf session permits some number of connections.
 * At least one admin connection and additional IOQ connections.
 */
struct spdk_nvmf_session {
	uint16_t			cntlid;
	struct spdk_nvmf_subsystem 	*subsys;

	struct {
		union spdk_nvme_cap_register	cap;
		union spdk_nvme_vs_register	vs;
		union spdk_nvme_cc_register	cc;
		union spdk_nvme_csts_register	csts;
	} vcprop; /* virtual controller properties */
	struct spdk_nvme_ctrlr_data	vcdata; /* virtual controller data */

	TAILQ_HEAD(connection_q, spdk_nvmf_conn) connections;
	int num_connections;
	int max_connections_allowed;
	uint32_t kato;
	union {
		uint32_t raw;
		struct {
			union spdk_nvme_critical_warning_state crit_warn;
			uint8_t ns_attr_notice : 1;
			uint8_t fw_activation_notice : 1;
		} bits;
	} async_event_config;
	struct spdk_nvmf_request *aer_req;
	uint8_t hostid[16];
	const struct spdk_nvmf_transport	*transport;

	TAILQ_ENTRY(spdk_nvmf_session) 		link;
};

void spdk_nvmf_session_connect(struct spdk_nvmf_conn *conn,
			       struct spdk_nvmf_fabric_connect_cmd *cmd,
			       struct spdk_nvmf_fabric_connect_data *data,
			       struct spdk_nvmf_fabric_connect_rsp *rsp);

void
spdk_nvmf_property_get(struct spdk_nvmf_session *session,
		       struct spdk_nvmf_fabric_prop_get_cmd *cmd,
		       struct spdk_nvmf_fabric_prop_get_rsp *response);

void
spdk_nvmf_property_set(struct spdk_nvmf_session *session,
		       struct spdk_nvmf_fabric_prop_set_cmd *cmd,
		       struct spdk_nvme_cpl *rsp);

int spdk_nvmf_session_poll(struct spdk_nvmf_session *session);

void spdk_nvmf_session_destruct(struct spdk_nvmf_session *session);

int spdk_nvmf_session_set_features_host_identifier(struct spdk_nvmf_request *req);
int spdk_nvmf_session_get_features_host_identifier(struct spdk_nvmf_request *req);

int spdk_nvmf_session_set_features_keep_alive_timer(struct spdk_nvmf_request *req);
int spdk_nvmf_session_get_features_keep_alive_timer(struct spdk_nvmf_request *req);

int spdk_nvmf_session_set_features_number_of_queues(struct spdk_nvmf_request *req);
int spdk_nvmf_session_get_features_number_of_queues(struct spdk_nvmf_request *req);

int spdk_nvmf_session_set_features_async_event_configuration(struct spdk_nvmf_request *req);
int spdk_nvmf_session_get_features_async_event_configuration(struct spdk_nvmf_request *req);

int spdk_nvmf_session_async_event_request(struct spdk_nvmf_request *req);

#endif
