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#ifndef NVMF_SESSION_H
#define NVMF_SESSION_H

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

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

/*
 * This structure maintains local NVMf library specific connection
 * state that includes an opaque pointer back to its parent fabric
 * transport connection context.
 */
struct nvmf_connection_entry {
	void *fabric_conn;
	int is_aq_conn;

	TAILQ_ENTRY(nvmf_connection_entry) entries;
};

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

struct nvmf_io_queue {
	uint16_t	sq_size;
	uint16_t	sq_active;
	uint16_t	cq_size;
	uint16_t	cq_active;
};

struct nvmf_vc_features {
	uint32_t	arb;	/* arbitration */
	uint32_t	pm;	/* power management */
	uint32_t	temp;	/* temp threshold */
	uint32_t	err;	/* error recovery */
	uint32_t	vwc;	/* volatile write cache */
	uint32_t	noq;	/* number of queues */
	uint32_t	ic;	/* interrupt coalescing */
	uint32_t	ivc;	/* interrupt vector config */
	uint32_t	wan;	/* write atomicity normal */
	uint32_t	aec;	/* async event config */
	uint32_t	apst;	/* autonomous power state transition */
	uint32_t	hmb;	/* host memory buffer */
	uint32_t	spm;	/* sw progress marker */
	uint32_t	hostid;	/* host identifier */
	uint32_t	resnm;	/* reservation notification mask */
	uint32_t	resp;	/* reservation persistence */
};

/*
 * 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 nvmf_session {
	struct spdk_nvmf_subsystem *subsys;

	uint16_t	cntlid;
	uint32_t	max_io_queues; /* maximum supported by backend NVMe library */
	struct nvmf_io_queue	qps[MAX_SESSION_IO_QUEUES];
	int		active_queues;
	int		is_valid;
	struct spdk_nvmf_ctrlr_properties	vcprop;	/* virtual controller properties */
	struct nvmf_vc_features		vcfeat;	/* virtual controller features */
	struct spdk_nvme_ctrlr_data	vcdata; /* virtual controller data */

	TAILQ_HEAD(connection_q, nvmf_connection_entry) connections;
	int num_connections;
	int max_connections_allowed;

	struct nvmf_request *aer_req_state;

	TAILQ_ENTRY(nvmf_session) entries;
};

struct nvmf_session *
nvmf_connect(void *fabric_conn,
	     struct spdk_nvmf_fabric_connect_cmd *connect,
	     struct spdk_nvmf_fabric_connect_data *connect_data,
	     struct spdk_nvmf_fabric_connect_rsp *response);

void
nvmf_disconnect(void *fabric_conn, struct nvmf_session *session);

void
nvmf_init_session_properties(struct nvmf_session *session, int aq_depth);

int
nvmf_process_admin_cmd(struct nvmf_session *session,
		       struct spdk_nvme_cmd *cmd,
		       void *buf, uint32_t len,
		       struct nvmf_request *req_state);

int
nvmf_process_io_cmd(struct nvmf_session *session,
		    struct spdk_nvme_cmd *cmd,
		    void *buf, uint32_t len,
		    struct nvmf_request *req_state);

void
nvmf_property_get(struct nvmf_session *session,
		  struct spdk_nvmf_fabric_prop_get_cmd *cmd,
		  struct spdk_nvmf_fabric_prop_get_rsp *response);

void
nvmf_property_set(struct nvmf_session *session,
		  struct spdk_nvmf_fabric_prop_set_cmd *cmd,
		  struct spdk_nvmf_fabric_prop_set_rsp *response,
		  bool *shutdown);

void
nvmf_check_io_completions(struct nvmf_session *session);

void
nvmf_check_admin_completions(struct nvmf_session *session);

#endif