/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _RAID5_LOG_H
#define _RAID5_LOG_H

int r5l_init_log(struct r5conf *conf, struct md_rdev *rdev);
void r5l_exit_log(struct r5conf *conf);
int r5l_write_stripe(struct r5l_log *log, struct stripe_head *head_sh);
void r5l_write_stripe_run(struct r5l_log *log);
void r5l_flush_stripe_to_raid(struct r5l_log *log);
void r5l_stripe_write_finished(struct stripe_head *sh);
int r5l_handle_flush_request(struct r5l_log *log, struct bio *bio);
void r5l_quiesce(struct r5l_log *log, int quiesce);
bool r5l_log_disk_error(struct r5conf *conf);
bool r5c_is_writeback(struct r5l_log *log);
int r5c_try_caching_write(struct r5conf *conf, struct stripe_head *sh,
                          struct stripe_head_state *s, int disks);
void r5c_finish_stripe_write_out(struct r5conf *conf, struct stripe_head *sh,
                                 struct stripe_head_state *s);
void r5c_release_extra_page(struct stripe_head *sh);
void r5c_use_extra_page(struct stripe_head *sh);
void r5l_wake_reclaim(struct r5l_log *log, sector_t space);
void r5c_handle_cached_data_endio(struct r5conf *conf,
                                  struct stripe_head *sh, int disks);
int r5c_cache_data(struct r5l_log *log, struct stripe_head *sh);
void r5c_make_stripe_write_out(struct stripe_head *sh);
void r5c_flush_cache(struct r5conf *conf, int num);
void r5c_check_stripe_cache_usage(struct r5conf *conf);
void r5c_check_cached_full_stripe(struct r5conf *conf);
extern struct md_sysfs_entry r5c_journal_mode;
void r5c_update_on_rdev_error(struct mddev *mddev, struct md_rdev *rdev);
bool r5c_big_stripe_cached(struct r5conf *conf, sector_t sect);
int r5l_start(struct r5l_log *log);

struct dma_async_tx_descriptor *
ops_run_partial_parity(struct stripe_head *sh, struct raid5_percpu *percpu,
                       struct dma_async_tx_descriptor *tx);
int ppl_init_log(struct r5conf *conf);
void ppl_exit_log(struct r5conf *conf);
int ppl_write_stripe(struct r5conf *conf, struct stripe_head *sh);
void ppl_write_stripe_run(struct r5conf *conf);
void ppl_stripe_write_finished(struct stripe_head *sh);
int ppl_modify_log(struct r5conf *conf, struct md_rdev *rdev, bool add);
void ppl_quiesce(struct r5conf *conf, int quiesce);
int ppl_handle_flush_request(struct bio *bio);
extern struct md_sysfs_entry ppl_write_hint;

static inline bool raid5_has_log(struct r5conf *conf)
{
        return test_bit(MD_HAS_JOURNAL, &conf->mddev->flags);
}

static inline bool raid5_has_ppl(struct r5conf *conf)
{
        return test_bit(MD_HAS_PPL, &conf->mddev->flags);
}

static inline int log_stripe(struct stripe_head *sh, struct stripe_head_state *s)
{
        struct r5conf *conf = sh->raid_conf;

        if (conf->log) {
                if (!test_bit(STRIPE_R5C_CACHING, &sh->state)) {
                        /* writing out phase */
                        if (s->waiting_extra_page)
                                return 0;
                        return r5l_write_stripe(conf->log, sh);
                } else if (test_bit(STRIPE_LOG_TRAPPED, &sh->state)) {
                        /* caching phase */
                        return r5c_cache_data(conf->log, sh);
                }
        } else if (raid5_has_ppl(conf)) {
                return ppl_write_stripe(conf, sh);
        }

        return -EAGAIN;
}

static inline void log_stripe_write_finished(struct stripe_head *sh)
{
        struct r5conf *conf = sh->raid_conf;

        if (conf->log)
                r5l_stripe_write_finished(sh);
        else if (raid5_has_ppl(conf))
                ppl_stripe_write_finished(sh);
}

static inline void log_write_stripe_run(struct r5conf *conf)
{
        if (conf->log)
                r5l_write_stripe_run(conf->log);
        else if (raid5_has_ppl(conf))
                ppl_write_stripe_run(conf);
}

static inline void log_flush_stripe_to_raid(struct r5conf *conf)
{
        if (conf->log)
                r5l_flush_stripe_to_raid(conf->log);
        else if (raid5_has_ppl(conf))
                ppl_write_stripe_run(conf);
}

static inline int log_handle_flush_request(struct r5conf *conf, struct bio *bio)
{
        int ret = -ENODEV;

        if (conf->log)
                ret = r5l_handle_flush_request(conf->log, bio);
        else if (raid5_has_ppl(conf))
                ret = ppl_handle_flush_request(bio);

        return ret;
}

static inline void log_quiesce(struct r5conf *conf, int quiesce)
{
        if (conf->log)
                r5l_quiesce(conf->log, quiesce);
        else if (raid5_has_ppl(conf))
                ppl_quiesce(conf, quiesce);
}

static inline void log_exit(struct r5conf *conf)
{
        if (conf->log)
                r5l_exit_log(conf);
        else if (raid5_has_ppl(conf))
                ppl_exit_log(conf);
}

static inline int log_init(struct r5conf *conf, struct md_rdev *journal_dev,
                           bool ppl)
{
        if (journal_dev)
                return r5l_init_log(conf, journal_dev);
        else if (ppl)
                return ppl_init_log(conf);

        return 0;
}

static inline int log_modify(struct r5conf *conf, struct md_rdev *rdev, bool add)
{
        if (raid5_has_ppl(conf))
                return ppl_modify_log(conf, rdev, add);

        return 0;
}

#endif