31cf633679
Add writer - tracks and manages band state transitions and write pointer as IO is issued to it. Signed-off-by: Kozlowski Mateusz <mateusz.kozlowski@intel.com> Signed-off-by: Artur Paszkiewicz <artur.paszkiewicz@intel.com> Change-Id: I5f878dc15bc1c1ac84835f75fe440672fad541d5 Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/13335 Tested-by: SPDK CI Jenkins <sys_sgci@intel.com> Reviewed-by: Ben Walker <benjamin.walker@intel.com> Reviewed-by: Jim Harris <james.r.harris@intel.com>
78 lines
1.6 KiB
C
78 lines
1.6 KiB
C
/* SPDX-License-Identifier: BSD-3-Clause
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* Copyright (c) Intel Corporation.
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* All rights reserved.
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*/
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#ifndef FTL_WRITER_H
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#define FTL_WRITER_H
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#include "spdk/stdinc.h"
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#include "spdk/queue.h"
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#include "ftl_io.h"
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struct ftl_writer {
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struct spdk_ftl_dev *dev;
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TAILQ_HEAD(, ftl_rq) rq_queue;
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/* Band currently being written to */
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struct ftl_band *band;
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/* Number of bands associated with writer */
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uint64_t num_bands;
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/* Band next being written to */
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struct ftl_band *next_band;
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/* List of full bands */
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TAILQ_HEAD(, ftl_band) full_bands;
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/* FTL band limit which blocks writes */
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int limit;
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/* Flag indicating halt has been requested */
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bool halt;
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/* Which type of band the writer uses */
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enum ftl_band_type writer_type;
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};
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bool ftl_writer_is_halted(struct ftl_writer *writer);
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void ftl_writer_init(struct spdk_ftl_dev *dev, struct ftl_writer *writer,
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uint64_t limit, enum ftl_band_type type);
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void ftl_writer_run(struct ftl_writer *writer);
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void ftl_writer_band_state_change(struct ftl_band *band);
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static inline void
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ftl_writer_halt(struct ftl_writer *writer)
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{
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writer->halt = true;
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}
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static inline void
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ftl_writer_resume(struct ftl_writer *writer)
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{
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writer->halt = false;
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}
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bool ftl_writer_is_halted(struct ftl_writer *writer);
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void ftl_writer_run(struct ftl_writer *writer);
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static inline void
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ftl_writer_queue_rq(struct ftl_writer *writer, struct ftl_rq *rq)
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{
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TAILQ_INSERT_TAIL(&writer->rq_queue, rq, qentry);
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}
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/**
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* @brief Returns free space in currently processing band
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*/
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uint64_t ftl_writer_get_free_blocks(struct ftl_writer *writer);
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#endif /* FTL_WRITER_H */
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