/*-
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/**
 * \file
 * NVMe driver public API extension for Zoned Namespace Command Set
 */

#ifndef SPDK_NVME_ZNS_H
#define SPDK_NVME_ZNS_H

#include "spdk/stdinc.h"

#ifdef __cplusplus
extern "C" {
#endif

#include "spdk/nvme.h"

/**
 * Get the Zoned Namespace Command Set Specific Identify Namespace data
 * as defined by the NVMe Zoned Namespace Command Set Specification.
 *
 * This function is thread safe and can be called at any point while the controller
 * is attached to the SPDK NVMe driver.
 *
 * \param ns Namespace.
 *
 * \return a pointer to the namespace data, or NULL if the namespace is not
 * a Zoned Namespace.
 */
const struct spdk_nvme_zns_ns_data *spdk_nvme_zns_ns_get_data(struct spdk_nvme_ns *ns);

/**
 * Get the zone size, in number of sectors, of the given namespace.
 *
 * This function is thread safe and can be called at any point while the controller
 * is attached to the SPDK NVMe driver.
 *
 * \param ns Namespace to query.
 *
 * \return the zone size of the given namespace in number of sectors.
 */
uint64_t spdk_nvme_zns_ns_get_zone_size_sectors(struct spdk_nvme_ns *ns);

/**
 * Get the zone size, in bytes, of the given namespace.
 *
 * This function is thread safe and can be called at any point while the controller
 * is attached to the SPDK NVMe driver.
 *
 * \param ns Namespace to query.
 *
 * \return the zone size of the given namespace in bytes.
 */
uint64_t spdk_nvme_zns_ns_get_zone_size(struct spdk_nvme_ns *ns);

/**
 * Get the number of zones for the given namespace.
 *
 * This function is thread safe and can be called at any point while the controller
 * is attached to the SPDK NVMe driver.
 *
 * \param ns Namespace to query.
 *
 * \return the number of zones.
 */
uint64_t spdk_nvme_zns_ns_get_num_zones(struct spdk_nvme_ns *ns);

/**
 * Get the maximum number of open zones for the given namespace.
 *
 * An open zone is a zone in any of the zone states:
 * EXPLICIT OPEN or IMPLICIT OPEN.
 *
 * If this value is 0, there is no limit.
 *
 * This function is thread safe and can be called at any point while the controller
 * is attached to the SPDK NVMe driver.
 *
 * \param ns Namespace to query.
 *
 * \return the maximum number of open zones.
 */
uint32_t spdk_nvme_zns_ns_get_max_open_zones(struct spdk_nvme_ns *ns);

/**
 * Get the maximum number of active zones for the given namespace.
 *
 * An active zone is a zone in any of the zone states:
 * EXPLICIT OPEN, IMPLICIT OPEN or CLOSED.
 *
 * If this value is 0, there is no limit.
 *
 * This function is thread safe and can be called at any point while the controller
 * is attached to the SPDK NVMe driver.
 *
 * \param ns Namespace to query.
 *
 * \return the maximum number of active zones.
 */
uint32_t spdk_nvme_zns_ns_get_max_active_zones(struct spdk_nvme_ns *ns);

/**
 * Get the Zoned Namespace Command Set Specific Identify Controller data
 * as defined by the NVMe Zoned Namespace Command Set Specification.
 *
 * This function is thread safe and can be called at any point while the controller
 * is attached to the SPDK NVMe driver.
 *
 * \param ctrlr Opaque handle to NVMe controller.
 *
 * \return pointer to the controller data, or NULL if the controller does not
 * support the Zoned Command Set.
 */
const struct spdk_nvme_zns_ctrlr_data *spdk_nvme_zns_ctrlr_get_data(struct spdk_nvme_ctrlr *ctrlr);

/**
 * Get the maximum zone append data transfer size of a given NVMe controller.
 *
 * \param ctrlr Opaque handle to NVMe controller.
 *
 * \return Maximum zone append data transfer size of the NVMe controller in bytes.
 */
uint32_t spdk_nvme_zns_ctrlr_get_max_zone_append_size(const struct spdk_nvme_ctrlr *ctrlr);

/**
 * Submit a zone append I/O to the specified NVMe namespace.
 *
 * The command is submitted to a qpair allocated by spdk_nvme_ctrlr_alloc_io_qpair().
 * The user must ensure that only one thread submits I/O on a given qpair at any
 * given time.
 *
 * \param ns NVMe namespace to submit the zone append I/O.
 * \param qpair I/O queue pair to submit the request.
 * \param buffer Virtual address pointer to the data payload buffer.
 * \param zslba Zone Start LBA of the zone that we are appending to.
 * \param lba_count Length (in sectors) for the zone append operation.
 * \param cb_fn Callback function to invoke when the I/O is completed.
 * \param cb_arg Argument to pass to the callback function.
 * \param io_flags Set flags, defined by the SPDK_NVME_IO_FLAGS_* entries in
 * spdk/nvme_spec.h, for this I/O.
 *
 * \return 0 if successfully submitted, negated errnos on the following error conditions:
 * -EINVAL: The request is malformed.
 * -ENOMEM: The request cannot be allocated.
 * -ENXIO: The qpair is failed at the transport level.
 */
int spdk_nvme_zns_zone_append(struct spdk_nvme_ns *ns, struct spdk_nvme_qpair *qpair,
			      void *buffer, uint64_t zslba,
			      uint32_t lba_count, spdk_nvme_cmd_cb cb_fn, void *cb_arg,
			      uint32_t io_flags);

/**
 * Submit a zone append I/O to the specified NVMe namespace.
 *
 * The command is submitted to a qpair allocated by spdk_nvme_ctrlr_alloc_io_qpair().
 * The user must ensure that only one thread submits I/O on a given qpair at any
 * given time.
 *
 * \param ns NVMe namespace to submit the zone append I/O.
 * \param qpair I/O queue pair to submit the request.
 * \param buffer Virtual address pointer to the data payload buffer.
 * \param metadata Virtual address pointer to the metadata payload, the length
 * of metadata is specified by spdk_nvme_ns_get_md_size().
 * \param zslba Zone Start LBA of the zone that we are appending to.
 * \param lba_count Length (in sectors) for the zone append operation.
 * \param cb_fn Callback function to invoke when the I/O is completed.
 * \param cb_arg Argument to pass to the callback function.
 * \param io_flags Set flags, defined by the SPDK_NVME_IO_FLAGS_* entries in
 * spdk/nvme_spec.h, for this I/O.
 * \param apptag_mask Application tag mask.
 * \param apptag Application tag to use end-to-end protection information.
 *
 * \return 0 if successfully submitted, negated errnos on the following error conditions:
 * -EINVAL: The request is malformed.
 * -ENOMEM: The request cannot be allocated.
 * -ENXIO: The qpair is failed at the transport level.
 */
int spdk_nvme_zns_zone_append_with_md(struct spdk_nvme_ns *ns, struct spdk_nvme_qpair *qpair,
				      void *buffer, void *metadata, uint64_t zslba,
				      uint32_t lba_count, spdk_nvme_cmd_cb cb_fn, void *cb_arg,
				      uint32_t io_flags, uint16_t apptag_mask, uint16_t apptag);

/**
 * Submit a zone append I/O to the specified NVMe namespace.
 *
 * The command is submitted to a qpair allocated by spdk_nvme_ctrlr_alloc_io_qpair().
 * The user must ensure that only one thread submits I/O on a given qpair at any
 * given time.
 *
 * \param ns NVMe namespace to submit the zone append I/O.
 * \param qpair I/O queue pair to submit the request.
 * \param zslba Zone Start LBA of the zone that we are appending to.
 * \param lba_count Length (in sectors) for the zone append operation.
 * \param cb_fn Callback function to invoke when the I/O is completed.
 * \param cb_arg Argument to pass to the callback function.
 * \param io_flags Set flags, defined in nvme_spec.h, for this I/O.
 * \param reset_sgl_fn Callback function to reset scattered payload.
 * \param next_sge_fn Callback function to iterate each scattered payload memory
 * segment.
 *
 * \return 0 if successfully submitted, negated errnos on the following error conditions:
 * -EINVAL: The request is malformed.
 * -ENOMEM: The request cannot be allocated.
 * -ENXIO: The qpair is failed at the transport level.
 */
int spdk_nvme_zns_zone_appendv(struct spdk_nvme_ns *ns, struct spdk_nvme_qpair *qpair,
			       uint64_t zslba, uint32_t lba_count,
			       spdk_nvme_cmd_cb cb_fn, void *cb_arg, uint32_t io_flags,
			       spdk_nvme_req_reset_sgl_cb reset_sgl_fn,
			       spdk_nvme_req_next_sge_cb next_sge_fn);

/**
 * Submit a zone append I/O to the specified NVMe namespace.
 *
 * The command is submitted to a qpair allocated by spdk_nvme_ctrlr_alloc_io_qpair().
 * The user must ensure that only one thread submits I/O on a given qpair at any
 * given time.
 *
 * \param ns NVMe namespace to submit the zone append I/O.
 * \param qpair I/O queue pair to submit the request.
 * \param zslba Zone Start LBA of the zone that we are appending to.
 * \param lba_count Length (in sectors) for the zone append operation.
 * \param cb_fn Callback function to invoke when the I/O is completed.
 * \param cb_arg Argument to pass to the callback function.
 * \param io_flags Set flags, defined in nvme_spec.h, for this I/O.
 * \param reset_sgl_fn Callback function to reset scattered payload.
 * \param next_sge_fn Callback function to iterate each scattered payload memory
 * segment.
 * \param metadata Virtual address pointer to the metadata payload, the length
 * of metadata is specified by spdk_nvme_ns_get_md_size().
 * \param apptag_mask Application tag mask.
 * \param apptag Application tag to use end-to-end protection information.
 *
 * \return 0 if successfully submitted, negated errnos on the following error conditions:
 * -EINVAL: The request is malformed.
 * -ENOMEM: The request cannot be allocated.
 * -ENXIO: The qpair is failed at the transport level.
 */
int spdk_nvme_zns_zone_appendv_with_md(struct spdk_nvme_ns *ns, struct spdk_nvme_qpair *qpair,
				       uint64_t zslba, uint32_t lba_count,
				       spdk_nvme_cmd_cb cb_fn, void *cb_arg, uint32_t io_flags,
				       spdk_nvme_req_reset_sgl_cb reset_sgl_fn,
				       spdk_nvme_req_next_sge_cb next_sge_fn, void *metadata,
				       uint16_t apptag_mask, uint16_t apptag);

/**
 * Submit a Close Zone operation to the specified NVMe namespace.
 *
 * \param ns Namespace.
 * \param qpair I/O queue pair to submit the request.
 * \param slba starting LBA of the zone to operate on.
 * \param select_all If this is set, slba will be ignored, and operation will
 * be performed on all zones that are in ZSIO or ZSEO state.
 * \param cb_fn Callback function invoked when the I/O command completes.
 * \param cb_arg Argument passed to callback function.
 *
 * \return 0 on success. Negated errno on failure.
 */
int spdk_nvme_zns_close_zone(struct spdk_nvme_ns *ns, struct spdk_nvme_qpair *qpair,
			     uint64_t slba, bool select_all,
			     spdk_nvme_cmd_cb cb_fn, void *cb_arg);

/**
 * Submit a Finish Zone operation to the specified NVMe namespace.
 *
 * \param ns Namespace.
 * \param qpair I/O queue pair to submit the request.
 * \param slba starting LBA of the zone to operate on.
 * \param select_all If this is set, slba will be ignored, and operation will
 * be performed on all zones that are in ZSIO, ZSEO, or ZSC state.
 * \param cb_fn Callback function invoked when the I/O command completes.
 * \param cb_arg Argument passed to callback function.
 *
 * \return 0 on success. Negated errno on failure.
 */
int spdk_nvme_zns_finish_zone(struct spdk_nvme_ns *ns, struct spdk_nvme_qpair *qpair,
			      uint64_t slba, bool select_all,
			      spdk_nvme_cmd_cb cb_fn, void *cb_arg);

/**
 * Submit a Open Zone operation to the specified NVMe namespace.
 *
 * \param ns Namespace.
 * \param qpair I/O queue pair to submit the request.
 * \param slba starting LBA of the zone to operate on.
 * \param select_all If this is set, slba will be ignored, and operation will
 * be performed on all zones that are in ZSC state.
 * \param cb_fn Callback function invoked when the I/O command completes.
 * \param cb_arg Argument passed to callback function.
 *
 * \return 0 on success. Negated errno on failure.
 */
int spdk_nvme_zns_open_zone(struct spdk_nvme_ns *ns, struct spdk_nvme_qpair *qpair,
			    uint64_t slba, bool select_all,
			    spdk_nvme_cmd_cb cb_fn, void *cb_arg);

/**
 * Submit a Reset Zone operation to the specified NVMe namespace.
 *
 * \param ns Namespace.
 * \param qpair I/O queue pair to submit the request.
 * \param slba starting LBA of the zone to operate on.
 * \param select_all If this is set, slba will be ignored, and operation will
 * be performed on all zones that are in ZSIO, ZSEO, ZSC, or ZSF state.
 * \param cb_fn Callback function invoked when the I/O command completes.
 * \param cb_arg Argument passed to callback function.
 *
 * \return 0 on success. Negated errno on failure.
 */
int spdk_nvme_zns_reset_zone(struct spdk_nvme_ns *ns, struct spdk_nvme_qpair *qpair,
			     uint64_t slba, bool select_all,
			     spdk_nvme_cmd_cb cb_fn, void *cb_arg);

/**
 * Submit a Offline Zone operation to the specified NVMe namespace.
 *
 * \param ns Namespace.
 * \param qpair I/O queue pair to submit the request.
 * \param slba starting LBA of the zone to operate on.
 * \param select_all If this is set, slba will be ignored, and operation will
 * be performed on all zones that are in ZSRO state.
 * \param cb_fn Callback function invoked when the I/O command completes.
 * \param cb_arg Argument passed to callback function.
 *
 * \return 0 on success. Negated errno on failure.
 */
int spdk_nvme_zns_offline_zone(struct spdk_nvme_ns *ns, struct spdk_nvme_qpair *qpair,
			       uint64_t slba, bool select_all,
			       spdk_nvme_cmd_cb cb_fn, void *cb_arg);

/**
 * Get a zone report from the specified NVMe namespace.
 *
 * \param ns Namespace.
 * \param qpair I/O queue pair to submit the request.
 * \param payload The pointer to the payload buffer.
 * \param payload_size The size of payload buffer.
 * \param slba starting LBA of the zone to operate on.
 * \param report_opts Filter on which zone states to include in the zone report.
 * \param partial_report If true, nr_zones field in the zone report indicates the number of zone
 * descriptors that were successfully written to the zone report. If false, nr_zones field in the
 * zone report indicates the number of zone descriptors that match the report_opts criteria.
 * \param cb_fn Callback function invoked when the I/O command completes.
 * \param cb_arg Argument passed to callback function.
 *
 * \return 0 on success. Negated errno on failure.
 */
int spdk_nvme_zns_report_zones(struct spdk_nvme_ns *ns, struct spdk_nvme_qpair *qpair,
			       void *payload, uint32_t payload_size, uint64_t slba,
			       enum spdk_nvme_zns_zra_report_opts report_opts, bool partial_report,
			       spdk_nvme_cmd_cb cb_fn, void *cb_arg);

#ifdef __cplusplus
}
#endif

#endif