/* SPDX-License-Identifier: GPL-2.0 */ /* * Copyright (C) 2017 Western Digital Corporation or its affiliates. * * This file is released under the GPL. */ #ifndef DM_ZONED_H #define DM_ZONED_H #include <linux/types.h> #include <linux/blkdev.h> #include <linux/device-mapper.h> #include <linux/dm-kcopyd.h> #include <linux/list.h> #include <linux/spinlock.h> #include <linux/mutex.h> #include <linux/workqueue.h> #include <linux/rwsem.h> #include <linux/rbtree.h> #include <linux/radix-tree.h> #include <linux/shrinker.h> /* * dm-zoned creates block devices with 4KB blocks, always. */ #define DMZ_BLOCK_SHIFT … #define DMZ_BLOCK_SIZE … #define DMZ_BLOCK_MASK … #define DMZ_BLOCK_SHIFT_BITS … #define DMZ_BLOCK_SIZE_BITS … #define DMZ_BLOCK_MASK_BITS … #define DMZ_BLOCK_SECTORS_SHIFT … #define DMZ_BLOCK_SECTORS … #define DMZ_BLOCK_SECTORS_MASK … /* * 4KB block <-> 512B sector conversion. */ #define dmz_blk2sect(b) … #define dmz_sect2blk(s) … #define dmz_bio_block(bio) … #define dmz_bio_blocks(bio) … struct dmz_metadata; struct dmz_reclaim; /* * Zoned block device information. */ struct dmz_dev { … }; #define dmz_bio_chunk(zmd, bio) … #define dmz_chunk_block(zmd, b) … /* Device flags. */ #define DMZ_BDEV_DYING … #define DMZ_CHECK_BDEV … #define DMZ_BDEV_REGULAR … /* * Zone descriptor. */ struct dm_zone { … }; /* * Zone flags. */ enum { … }; /* * Zone data accessors. */ #define dmz_is_cache(z) … #define dmz_is_rnd(z) … #define dmz_is_seq(z) … #define dmz_is_empty(z) … #define dmz_is_offline(z) … #define dmz_is_readonly(z) … #define dmz_in_reclaim(z) … #define dmz_is_reserved(z) … #define dmz_seq_write_err(z) … #define dmz_reclaim_should_terminate(z) … #define dmz_is_meta(z) … #define dmz_is_buf(z) … #define dmz_is_data(z) … #define dmz_weight(z) … /* * Message functions. */ #define dmz_dev_info(dev, format, args...) … #define dmz_dev_err(dev, format, args...) … #define dmz_dev_warn(dev, format, args...) … #define dmz_dev_debug(dev, format, args...) … /* * Functions defined in dm-zoned-metadata.c */ int dmz_ctr_metadata(struct dmz_dev *dev, int num_dev, struct dmz_metadata **zmd, const char *devname); void dmz_dtr_metadata(struct dmz_metadata *zmd); int dmz_resume_metadata(struct dmz_metadata *zmd); void dmz_lock_map(struct dmz_metadata *zmd); void dmz_unlock_map(struct dmz_metadata *zmd); void dmz_lock_metadata(struct dmz_metadata *zmd); void dmz_unlock_metadata(struct dmz_metadata *zmd); void dmz_lock_flush(struct dmz_metadata *zmd); void dmz_unlock_flush(struct dmz_metadata *zmd); int dmz_flush_metadata(struct dmz_metadata *zmd); const char *dmz_metadata_label(struct dmz_metadata *zmd); sector_t dmz_start_sect(struct dmz_metadata *zmd, struct dm_zone *zone); sector_t dmz_start_block(struct dmz_metadata *zmd, struct dm_zone *zone); unsigned int dmz_nr_chunks(struct dmz_metadata *zmd); bool dmz_check_dev(struct dmz_metadata *zmd); bool dmz_dev_is_dying(struct dmz_metadata *zmd); #define DMZ_ALLOC_RND … #define DMZ_ALLOC_CACHE … #define DMZ_ALLOC_SEQ … #define DMZ_ALLOC_RECLAIM … struct dm_zone *dmz_alloc_zone(struct dmz_metadata *zmd, unsigned int dev_idx, unsigned long flags); void dmz_free_zone(struct dmz_metadata *zmd, struct dm_zone *zone); void dmz_map_zone(struct dmz_metadata *zmd, struct dm_zone *zone, unsigned int chunk); void dmz_unmap_zone(struct dmz_metadata *zmd, struct dm_zone *zone); unsigned int dmz_nr_zones(struct dmz_metadata *zmd); unsigned int dmz_nr_cache_zones(struct dmz_metadata *zmd); unsigned int dmz_nr_unmap_cache_zones(struct dmz_metadata *zmd); unsigned int dmz_nr_rnd_zones(struct dmz_metadata *zmd, int idx); unsigned int dmz_nr_unmap_rnd_zones(struct dmz_metadata *zmd, int idx); unsigned int dmz_nr_seq_zones(struct dmz_metadata *zmd, int idx); unsigned int dmz_nr_unmap_seq_zones(struct dmz_metadata *zmd, int idx); unsigned int dmz_zone_nr_blocks(struct dmz_metadata *zmd); unsigned int dmz_zone_nr_blocks_shift(struct dmz_metadata *zmd); unsigned int dmz_zone_nr_sectors(struct dmz_metadata *zmd); unsigned int dmz_zone_nr_sectors_shift(struct dmz_metadata *zmd); /* * Activate a zone (increment its reference count). */ static inline void dmz_activate_zone(struct dm_zone *zone) { … } int dmz_lock_zone_reclaim(struct dm_zone *zone); void dmz_unlock_zone_reclaim(struct dm_zone *zone); struct dm_zone *dmz_get_zone_for_reclaim(struct dmz_metadata *zmd, unsigned int dev_idx, bool idle); struct dm_zone *dmz_get_chunk_mapping(struct dmz_metadata *zmd, unsigned int chunk, enum req_op op); void dmz_put_chunk_mapping(struct dmz_metadata *zmd, struct dm_zone *zone); struct dm_zone *dmz_get_chunk_buffer(struct dmz_metadata *zmd, struct dm_zone *dzone); int dmz_validate_blocks(struct dmz_metadata *zmd, struct dm_zone *zone, sector_t chunk_block, unsigned int nr_blocks); int dmz_invalidate_blocks(struct dmz_metadata *zmd, struct dm_zone *zone, sector_t chunk_block, unsigned int nr_blocks); int dmz_block_valid(struct dmz_metadata *zmd, struct dm_zone *zone, sector_t chunk_block); int dmz_first_valid_block(struct dmz_metadata *zmd, struct dm_zone *zone, sector_t *chunk_block); int dmz_copy_valid_blocks(struct dmz_metadata *zmd, struct dm_zone *from_zone, struct dm_zone *to_zone); int dmz_merge_valid_blocks(struct dmz_metadata *zmd, struct dm_zone *from_zone, struct dm_zone *to_zone, sector_t chunk_block); /* * Functions defined in dm-zoned-reclaim.c */ int dmz_ctr_reclaim(struct dmz_metadata *zmd, struct dmz_reclaim **zrc, int idx); void dmz_dtr_reclaim(struct dmz_reclaim *zrc); void dmz_suspend_reclaim(struct dmz_reclaim *zrc); void dmz_resume_reclaim(struct dmz_reclaim *zrc); void dmz_reclaim_bio_acc(struct dmz_reclaim *zrc); void dmz_schedule_reclaim(struct dmz_reclaim *zrc); /* * Functions defined in dm-zoned-target.c */ bool dmz_bdev_is_dying(struct dmz_dev *dmz_dev); bool dmz_check_bdev(struct dmz_dev *dmz_dev); /* * Deactivate a zone. This decrement the zone reference counter * indicating that all BIOs to the zone have completed when the count is 0. */ static inline void dmz_deactivate_zone(struct dm_zone *zone) { … } /* * Test if a zone is active, that is, has a refcount > 0. */ static inline bool dmz_is_active(struct dm_zone *zone) { … } #endif /* DM_ZONED_H */
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