Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) /* SPDX-License-Identifier: GPL-2.0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * Copyright (C) 2017 Western Digital Corporation or its affiliates.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * This file is released under the GPL.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) #ifndef DM_ZONED_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #define DM_ZONED_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/blkdev.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <linux/device-mapper.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <linux/dm-kcopyd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <linux/list.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include <linux/spinlock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include <linux/mutex.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #include <linux/workqueue.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #include <linux/rwsem.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #include <linux/rbtree.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) #include <linux/radix-tree.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) #include <linux/shrinker.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25)  * dm-zoned creates block devices with 4KB blocks, always.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) #define DMZ_BLOCK_SHIFT		12
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) #define DMZ_BLOCK_SIZE		(1 << DMZ_BLOCK_SHIFT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) #define DMZ_BLOCK_MASK		(DMZ_BLOCK_SIZE - 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) #define DMZ_BLOCK_SHIFT_BITS	(DMZ_BLOCK_SHIFT + 3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) #define DMZ_BLOCK_SIZE_BITS	(1 << DMZ_BLOCK_SHIFT_BITS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) #define DMZ_BLOCK_MASK_BITS	(DMZ_BLOCK_SIZE_BITS - 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) #define DMZ_BLOCK_SECTORS_SHIFT	(DMZ_BLOCK_SHIFT - SECTOR_SHIFT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) #define DMZ_BLOCK_SECTORS	(DMZ_BLOCK_SIZE >> SECTOR_SHIFT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) #define DMZ_BLOCK_SECTORS_MASK	(DMZ_BLOCK_SECTORS - 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40)  * 4KB block <-> 512B sector conversion.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) #define dmz_blk2sect(b)		((sector_t)(b) << DMZ_BLOCK_SECTORS_SHIFT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) #define dmz_sect2blk(s)		((sector_t)(s) >> DMZ_BLOCK_SECTORS_SHIFT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) #define dmz_bio_block(bio)	dmz_sect2blk((bio)->bi_iter.bi_sector)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) #define dmz_bio_blocks(bio)	dmz_sect2blk(bio_sectors(bio))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) struct dmz_metadata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) struct dmz_reclaim;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52)  * Zoned block device information.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) struct dmz_dev {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	struct block_device	*bdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	struct dmz_metadata	*metadata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	struct dmz_reclaim	*reclaim;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 	char			name[BDEVNAME_SIZE];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 	uuid_t			uuid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 	sector_t		capacity;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 	unsigned int		dev_idx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 	unsigned int		nr_zones;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 	unsigned int		zone_offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	unsigned int		flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 	sector_t		zone_nr_sectors;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 	unsigned int		nr_rnd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	atomic_t		unmap_nr_rnd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	struct list_head	unmap_rnd_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 	struct list_head	map_rnd_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	unsigned int		nr_seq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 	atomic_t		unmap_nr_seq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	struct list_head	unmap_seq_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 	struct list_head	map_seq_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) #define dmz_bio_chunk(zmd, bio)	((bio)->bi_iter.bi_sector >> \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 				 dmz_zone_nr_sectors_shift(zmd))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) #define dmz_chunk_block(zmd, b)	((b) & (dmz_zone_nr_blocks(zmd) - 1))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) /* Device flags. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) #define DMZ_BDEV_DYING		(1 << 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) #define DMZ_CHECK_BDEV		(2 << 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) #define DMZ_BDEV_REGULAR	(4 << 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94)  * Zone descriptor.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) struct dm_zone {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	/* For listing the zone depending on its state */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 	struct list_head	link;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 	/* Device containing this zone */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	struct dmz_dev		*dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	/* Zone type and state */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 	unsigned long		flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 	/* Zone activation reference count */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	atomic_t		refcount;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	/* Zone id */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	unsigned int		id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	/* Zone write pointer block (relative to the zone start block) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	unsigned int		wp_block;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	/* Zone weight (number of valid blocks in the zone) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 	unsigned int		weight;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	/* The chunk that the zone maps */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 	unsigned int		chunk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 	 * For a sequential data zone, pointer to the random zone
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 	 * used as a buffer for processing unaligned writes.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 	 * For a buffer zone, this points back to the data zone.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 	struct dm_zone		*bzone;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)  * Zone flags.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) enum {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 	/* Zone write type */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 	DMZ_CACHE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 	DMZ_RND,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	DMZ_SEQ,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	/* Zone critical condition */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 	DMZ_OFFLINE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	DMZ_READ_ONLY,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 	/* How the zone is being used */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	DMZ_META,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 	DMZ_DATA,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 	DMZ_BUF,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 	DMZ_RESERVED,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 	/* Zone internal state */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 	DMZ_RECLAIM,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 	DMZ_SEQ_WRITE_ERR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 	DMZ_RECLAIM_TERMINATE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155)  * Zone data accessors.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) #define dmz_is_cache(z)		test_bit(DMZ_CACHE, &(z)->flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) #define dmz_is_rnd(z)		test_bit(DMZ_RND, &(z)->flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) #define dmz_is_seq(z)		test_bit(DMZ_SEQ, &(z)->flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) #define dmz_is_empty(z)		((z)->wp_block == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) #define dmz_is_offline(z)	test_bit(DMZ_OFFLINE, &(z)->flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) #define dmz_is_readonly(z)	test_bit(DMZ_READ_ONLY, &(z)->flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) #define dmz_in_reclaim(z)	test_bit(DMZ_RECLAIM, &(z)->flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) #define dmz_is_reserved(z)	test_bit(DMZ_RESERVED, &(z)->flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) #define dmz_seq_write_err(z)	test_bit(DMZ_SEQ_WRITE_ERR, &(z)->flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) #define dmz_reclaim_should_terminate(z) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 				test_bit(DMZ_RECLAIM_TERMINATE, &(z)->flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) #define dmz_is_meta(z)		test_bit(DMZ_META, &(z)->flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) #define dmz_is_buf(z)		test_bit(DMZ_BUF, &(z)->flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) #define dmz_is_data(z)		test_bit(DMZ_DATA, &(z)->flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) #define dmz_weight(z)		((z)->weight)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176)  * Message functions.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) #define dmz_dev_info(dev, format, args...)	\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 	DMINFO("(%s): " format, (dev)->name, ## args)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) #define dmz_dev_err(dev, format, args...)	\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	DMERR("(%s): " format, (dev)->name, ## args)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) #define dmz_dev_warn(dev, format, args...)	\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 	DMWARN("(%s): " format, (dev)->name, ## args)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) #define dmz_dev_debug(dev, format, args...)	\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 	DMDEBUG("(%s): " format, (dev)->name, ## args)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191)  * Functions defined in dm-zoned-metadata.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) int dmz_ctr_metadata(struct dmz_dev *dev, int num_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 		     struct dmz_metadata **zmd, const char *devname);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) void dmz_dtr_metadata(struct dmz_metadata *zmd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) int dmz_resume_metadata(struct dmz_metadata *zmd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) void dmz_lock_map(struct dmz_metadata *zmd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) void dmz_unlock_map(struct dmz_metadata *zmd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) void dmz_lock_metadata(struct dmz_metadata *zmd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) void dmz_unlock_metadata(struct dmz_metadata *zmd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) void dmz_lock_flush(struct dmz_metadata *zmd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) void dmz_unlock_flush(struct dmz_metadata *zmd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) int dmz_flush_metadata(struct dmz_metadata *zmd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) const char *dmz_metadata_label(struct dmz_metadata *zmd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) sector_t dmz_start_sect(struct dmz_metadata *zmd, struct dm_zone *zone);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) sector_t dmz_start_block(struct dmz_metadata *zmd, struct dm_zone *zone);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) unsigned int dmz_nr_chunks(struct dmz_metadata *zmd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) bool dmz_check_dev(struct dmz_metadata *zmd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) bool dmz_dev_is_dying(struct dmz_metadata *zmd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) #define DMZ_ALLOC_RND		0x01
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) #define DMZ_ALLOC_CACHE		0x02
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) #define DMZ_ALLOC_SEQ		0x04
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) #define DMZ_ALLOC_RECLAIM	0x10
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) struct dm_zone *dmz_alloc_zone(struct dmz_metadata *zmd,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 			       unsigned int dev_idx, unsigned long flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) void dmz_free_zone(struct dmz_metadata *zmd, struct dm_zone *zone);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) void dmz_map_zone(struct dmz_metadata *zmd, struct dm_zone *zone,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 		  unsigned int chunk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) void dmz_unmap_zone(struct dmz_metadata *zmd, struct dm_zone *zone);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) unsigned int dmz_nr_zones(struct dmz_metadata *zmd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) unsigned int dmz_nr_cache_zones(struct dmz_metadata *zmd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) unsigned int dmz_nr_unmap_cache_zones(struct dmz_metadata *zmd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) unsigned int dmz_nr_rnd_zones(struct dmz_metadata *zmd, int idx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) unsigned int dmz_nr_unmap_rnd_zones(struct dmz_metadata *zmd, int idx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) unsigned int dmz_nr_seq_zones(struct dmz_metadata *zmd, int idx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) unsigned int dmz_nr_unmap_seq_zones(struct dmz_metadata *zmd, int idx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) unsigned int dmz_zone_nr_blocks(struct dmz_metadata *zmd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) unsigned int dmz_zone_nr_blocks_shift(struct dmz_metadata *zmd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) unsigned int dmz_zone_nr_sectors(struct dmz_metadata *zmd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) unsigned int dmz_zone_nr_sectors_shift(struct dmz_metadata *zmd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239)  * Activate a zone (increment its reference count).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) static inline void dmz_activate_zone(struct dm_zone *zone)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 	atomic_inc(&zone->refcount);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) int dmz_lock_zone_reclaim(struct dm_zone *zone);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) void dmz_unlock_zone_reclaim(struct dm_zone *zone);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) struct dm_zone *dmz_get_zone_for_reclaim(struct dmz_metadata *zmd,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 					 unsigned int dev_idx, bool idle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) struct dm_zone *dmz_get_chunk_mapping(struct dmz_metadata *zmd,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 				      unsigned int chunk, int op);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) void dmz_put_chunk_mapping(struct dmz_metadata *zmd, struct dm_zone *zone);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) struct dm_zone *dmz_get_chunk_buffer(struct dmz_metadata *zmd,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 				     struct dm_zone *dzone);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) int dmz_validate_blocks(struct dmz_metadata *zmd, struct dm_zone *zone,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 			sector_t chunk_block, unsigned int nr_blocks);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) int dmz_invalidate_blocks(struct dmz_metadata *zmd, struct dm_zone *zone,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 			  sector_t chunk_block, unsigned int nr_blocks);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) int dmz_block_valid(struct dmz_metadata *zmd, struct dm_zone *zone,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 		    sector_t chunk_block);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) int dmz_first_valid_block(struct dmz_metadata *zmd, struct dm_zone *zone,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 			  sector_t *chunk_block);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) int dmz_copy_valid_blocks(struct dmz_metadata *zmd, struct dm_zone *from_zone,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 			  struct dm_zone *to_zone);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) int dmz_merge_valid_blocks(struct dmz_metadata *zmd, struct dm_zone *from_zone,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 			   struct dm_zone *to_zone, sector_t chunk_block);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271)  * Functions defined in dm-zoned-reclaim.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) int dmz_ctr_reclaim(struct dmz_metadata *zmd, struct dmz_reclaim **zrc, int idx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) void dmz_dtr_reclaim(struct dmz_reclaim *zrc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) void dmz_suspend_reclaim(struct dmz_reclaim *zrc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) void dmz_resume_reclaim(struct dmz_reclaim *zrc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) void dmz_reclaim_bio_acc(struct dmz_reclaim *zrc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) void dmz_schedule_reclaim(struct dmz_reclaim *zrc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281)  * Functions defined in dm-zoned-target.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) bool dmz_bdev_is_dying(struct dmz_dev *dmz_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) bool dmz_check_bdev(struct dmz_dev *dmz_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287)  * Deactivate a zone. This decrement the zone reference counter
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288)  * indicating that all BIOs to the zone have completed when the count is 0.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) static inline void dmz_deactivate_zone(struct dm_zone *zone)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 	dmz_reclaim_bio_acc(zone->dev->reclaim);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 	atomic_dec(&zone->refcount);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297)  * Test if a zone is active, that is, has a refcount > 0.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) static inline bool dmz_is_active(struct dm_zone *zone)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 	return atomic_read(&zone->refcount);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) #endif /* DM_ZONED_H */