xtensa: support DMA buffers in high memory
[cris-mirror.git] / drivers / md / raid5-log.h
blob0c76bcedfc1cbd8b0af33008652095e3862f22c9
1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _RAID5_LOG_H
3 #define _RAID5_LOG_H
5 extern int r5l_init_log(struct r5conf *conf, struct md_rdev *rdev);
6 extern void r5l_exit_log(struct r5conf *conf);
7 extern int r5l_write_stripe(struct r5l_log *log, struct stripe_head *head_sh);
8 extern void r5l_write_stripe_run(struct r5l_log *log);
9 extern void r5l_flush_stripe_to_raid(struct r5l_log *log);
10 extern void r5l_stripe_write_finished(struct stripe_head *sh);
11 extern int r5l_handle_flush_request(struct r5l_log *log, struct bio *bio);
12 extern void r5l_quiesce(struct r5l_log *log, int quiesce);
13 extern bool r5l_log_disk_error(struct r5conf *conf);
14 extern bool r5c_is_writeback(struct r5l_log *log);
15 extern int
16 r5c_try_caching_write(struct r5conf *conf, struct stripe_head *sh,
17 struct stripe_head_state *s, int disks);
18 extern void
19 r5c_finish_stripe_write_out(struct r5conf *conf, struct stripe_head *sh,
20 struct stripe_head_state *s);
21 extern void r5c_release_extra_page(struct stripe_head *sh);
22 extern void r5c_use_extra_page(struct stripe_head *sh);
23 extern void r5l_wake_reclaim(struct r5l_log *log, sector_t space);
24 extern void r5c_handle_cached_data_endio(struct r5conf *conf,
25 struct stripe_head *sh, int disks);
26 extern int r5c_cache_data(struct r5l_log *log, struct stripe_head *sh);
27 extern void r5c_make_stripe_write_out(struct stripe_head *sh);
28 extern void r5c_flush_cache(struct r5conf *conf, int num);
29 extern void r5c_check_stripe_cache_usage(struct r5conf *conf);
30 extern void r5c_check_cached_full_stripe(struct r5conf *conf);
31 extern struct md_sysfs_entry r5c_journal_mode;
32 extern void r5c_update_on_rdev_error(struct mddev *mddev,
33 struct md_rdev *rdev);
34 extern bool r5c_big_stripe_cached(struct r5conf *conf, sector_t sect);
35 extern int r5l_start(struct r5l_log *log);
37 extern struct dma_async_tx_descriptor *
38 ops_run_partial_parity(struct stripe_head *sh, struct raid5_percpu *percpu,
39 struct dma_async_tx_descriptor *tx);
40 extern int ppl_init_log(struct r5conf *conf);
41 extern void ppl_exit_log(struct r5conf *conf);
42 extern int ppl_write_stripe(struct r5conf *conf, struct stripe_head *sh);
43 extern void ppl_write_stripe_run(struct r5conf *conf);
44 extern void ppl_stripe_write_finished(struct stripe_head *sh);
45 extern int ppl_modify_log(struct r5conf *conf, struct md_rdev *rdev, bool add);
46 extern void ppl_quiesce(struct r5conf *conf, int quiesce);
48 static inline bool raid5_has_ppl(struct r5conf *conf)
50 return test_bit(MD_HAS_PPL, &conf->mddev->flags);
53 static inline int log_stripe(struct stripe_head *sh, struct stripe_head_state *s)
55 struct r5conf *conf = sh->raid_conf;
57 if (conf->log) {
58 if (!test_bit(STRIPE_R5C_CACHING, &sh->state)) {
59 /* writing out phase */
60 if (s->waiting_extra_page)
61 return 0;
62 return r5l_write_stripe(conf->log, sh);
63 } else if (test_bit(STRIPE_LOG_TRAPPED, &sh->state)) {
64 /* caching phase */
65 return r5c_cache_data(conf->log, sh);
67 } else if (raid5_has_ppl(conf)) {
68 return ppl_write_stripe(conf, sh);
71 return -EAGAIN;
74 static inline void log_stripe_write_finished(struct stripe_head *sh)
76 struct r5conf *conf = sh->raid_conf;
78 if (conf->log)
79 r5l_stripe_write_finished(sh);
80 else if (raid5_has_ppl(conf))
81 ppl_stripe_write_finished(sh);
84 static inline void log_write_stripe_run(struct r5conf *conf)
86 if (conf->log)
87 r5l_write_stripe_run(conf->log);
88 else if (raid5_has_ppl(conf))
89 ppl_write_stripe_run(conf);
92 static inline void log_flush_stripe_to_raid(struct r5conf *conf)
94 if (conf->log)
95 r5l_flush_stripe_to_raid(conf->log);
96 else if (raid5_has_ppl(conf))
97 ppl_write_stripe_run(conf);
100 static inline int log_handle_flush_request(struct r5conf *conf, struct bio *bio)
102 int ret = -ENODEV;
104 if (conf->log)
105 ret = r5l_handle_flush_request(conf->log, bio);
106 else if (raid5_has_ppl(conf))
107 ret = 0;
109 return ret;
112 static inline void log_quiesce(struct r5conf *conf, int quiesce)
114 if (conf->log)
115 r5l_quiesce(conf->log, quiesce);
116 else if (raid5_has_ppl(conf))
117 ppl_quiesce(conf, quiesce);
120 static inline void log_exit(struct r5conf *conf)
122 if (conf->log)
123 r5l_exit_log(conf);
124 else if (raid5_has_ppl(conf))
125 ppl_exit_log(conf);
128 static inline int log_init(struct r5conf *conf, struct md_rdev *journal_dev,
129 bool ppl)
131 if (journal_dev)
132 return r5l_init_log(conf, journal_dev);
133 else if (ppl)
134 return ppl_init_log(conf);
136 return 0;
139 static inline int log_modify(struct r5conf *conf, struct md_rdev *rdev, bool add)
141 if (raid5_has_ppl(conf))
142 return ppl_modify_log(conf, rdev, add);
144 return 0;
147 #endif