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- /* SPDX-License-Identifier: GPL-2.0 */
- /*
- * Copyright (C) 2015 IT University of Copenhagen (rrpc.h)
- * Copyright (C) 2016 CNEX Labs
- * Initial release: Matias Bjorling <matias@cnexlabs.com>
- * Write buffering: Javier Gonzalez <javier@cnexlabs.com>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License version
- * 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * Implementation of a Physical Block-device target for Open-channel SSDs.
- *
- */
- #ifndef PBLK_H_
- #define PBLK_H_
- #include <linux/blkdev.h>
- #include <linux/blk-mq.h>
- #include <linux/bio.h>
- #include <linux/module.h>
- #include <linux/kthread.h>
- #include <linux/vmalloc.h>
- #include <linux/crc32.h>
- #include <linux/uuid.h>
- #include <linux/lightnvm.h>
- /* Run only GC if less than 1/X blocks are free */
- #define GC_LIMIT_INVERSE 5
- #define GC_TIME_MSECS 1000
- #define PBLK_SECTOR (512)
- #define PBLK_EXPOSED_PAGE_SIZE (4096)
- #define PBLK_NR_CLOSE_JOBS (4)
- #define PBLK_CACHE_NAME_LEN (DISK_NAME_LEN + 16)
- /* Max 512 LUNs per device */
- #define PBLK_MAX_LUNS_BITMAP (4)
- #define NR_PHY_IN_LOG (PBLK_EXPOSED_PAGE_SIZE / PBLK_SECTOR)
- /* Static pool sizes */
- #define PBLK_GEN_WS_POOL_SIZE (2)
- #define PBLK_DEFAULT_OP (11)
- enum {
- PBLK_READ = READ,
- PBLK_WRITE = WRITE,/* Write from write buffer */
- PBLK_WRITE_INT, /* Internal write - no write buffer */
- PBLK_READ_RECOV, /* Recovery read - errors allowed */
- PBLK_ERASE,
- };
- enum {
- /* IO Types */
- PBLK_IOTYPE_USER = 1 << 0,
- PBLK_IOTYPE_GC = 1 << 1,
- /* Write buffer flags */
- PBLK_FLUSH_ENTRY = 1 << 2,
- PBLK_WRITTEN_DATA = 1 << 3,
- PBLK_SUBMITTED_ENTRY = 1 << 4,
- PBLK_WRITABLE_ENTRY = 1 << 5,
- };
- enum {
- PBLK_BLK_ST_OPEN = 0x1,
- PBLK_BLK_ST_CLOSED = 0x2,
- };
- enum {
- PBLK_CHUNK_RESET_START,
- PBLK_CHUNK_RESET_DONE,
- PBLK_CHUNK_RESET_FAILED,
- };
- struct pblk_sec_meta {
- u64 reserved;
- __le64 lba;
- };
- /* The number of GC lists and the rate-limiter states go together. This way the
- * rate-limiter can dictate how much GC is needed based on resource utilization.
- */
- #define PBLK_GC_NR_LISTS 4
- enum {
- PBLK_RL_OFF = 0,
- PBLK_RL_WERR = 1,
- PBLK_RL_HIGH = 2,
- PBLK_RL_MID = 3,
- PBLK_RL_LOW = 4
- };
- #define pblk_dma_ppa_size (sizeof(u64) * NVM_MAX_VLBA)
- /* write buffer completion context */
- struct pblk_c_ctx {
- struct list_head list; /* Head for out-of-order completion */
- unsigned long *lun_bitmap; /* Luns used on current request */
- unsigned int sentry;
- unsigned int nr_valid;
- unsigned int nr_padded;
- };
- /* read context */
- struct pblk_g_ctx {
- void *private;
- unsigned long start_time;
- u64 lba;
- };
- /* Pad context */
- struct pblk_pad_rq {
- struct pblk *pblk;
- struct completion wait;
- struct kref ref;
- };
- /* Recovery context */
- struct pblk_rec_ctx {
- struct pblk *pblk;
- struct nvm_rq *rqd;
- struct work_struct ws_rec;
- };
- /* Write context */
- struct pblk_w_ctx {
- struct bio_list bios; /* Original bios - used for completion
- * in REQ_FUA, REQ_FLUSH case
- */
- u64 lba; /* Logic addr. associated with entry */
- struct ppa_addr ppa; /* Physic addr. associated with entry */
- int flags; /* Write context flags */
- };
- struct pblk_rb_entry {
- struct ppa_addr cacheline; /* Cacheline for this entry */
- void *data; /* Pointer to data on this entry */
- struct pblk_w_ctx w_ctx; /* Context for this entry */
- struct list_head index; /* List head to enable indexes */
- };
- #define EMPTY_ENTRY (~0U)
- struct pblk_rb_pages {
- struct page *pages;
- int order;
- struct list_head list;
- };
- struct pblk_rb {
- struct pblk_rb_entry *entries; /* Ring buffer entries */
- unsigned int mem; /* Write offset - points to next
- * writable entry in memory
- */
- unsigned int subm; /* Read offset - points to last entry
- * that has been submitted to the media
- * to be persisted
- */
- unsigned int sync; /* Synced - backpointer that signals
- * the last submitted entry that has
- * been successfully persisted to media
- */
- unsigned int flush_point; /* Sync point - last entry that must be
- * flushed to the media. Used with
- * REQ_FLUSH and REQ_FUA
- */
- unsigned int l2p_update; /* l2p update point - next entry for
- * which l2p mapping will be updated to
- * contain a device ppa address (instead
- * of a cacheline
- */
- unsigned int nr_entries; /* Number of entries in write buffer -
- * must be a power of two
- */
- unsigned int seg_size; /* Size of the data segments being
- * stored on each entry. Typically this
- * will be 4KB
- */
- unsigned int back_thres; /* Threshold that shall be maintained by
- * the backpointer in order to respect
- * geo->mw_cunits on a per chunk basis
- */
- struct list_head pages; /* List of data pages */
- spinlock_t w_lock; /* Write lock */
- spinlock_t s_lock; /* Sync lock */
- #ifdef CONFIG_NVM_PBLK_DEBUG
- atomic_t inflight_flush_point; /* Not served REQ_FLUSH | REQ_FUA */
- #endif
- };
- #define PBLK_RECOVERY_SECTORS 16
- struct pblk_lun {
- struct ppa_addr bppa;
- struct semaphore wr_sem;
- };
- struct pblk_gc_rq {
- struct pblk_line *line;
- void *data;
- u64 paddr_list[NVM_MAX_VLBA];
- u64 lba_list[NVM_MAX_VLBA];
- int nr_secs;
- int secs_to_gc;
- struct list_head list;
- };
- struct pblk_gc {
- /* These states are not protected by a lock since (i) they are in the
- * fast path, and (ii) they are not critical.
- */
- int gc_active;
- int gc_enabled;
- int gc_forced;
- struct task_struct *gc_ts;
- struct task_struct *gc_writer_ts;
- struct task_struct *gc_reader_ts;
- struct workqueue_struct *gc_line_reader_wq;
- struct workqueue_struct *gc_reader_wq;
- struct timer_list gc_timer;
- struct semaphore gc_sem;
- atomic_t read_inflight_gc; /* Number of lines with inflight GC reads */
- atomic_t pipeline_gc; /* Number of lines in the GC pipeline -
- * started reads to finished writes
- */
- int w_entries;
- struct list_head w_list;
- struct list_head r_list;
- spinlock_t lock;
- spinlock_t w_lock;
- spinlock_t r_lock;
- };
- struct pblk_rl {
- unsigned int high; /* Upper threshold for rate limiter (free run -
- * user I/O rate limiter
- */
- unsigned int high_pw; /* High rounded up as a power of 2 */
- #define PBLK_USER_HIGH_THRS 8 /* Begin write limit at 12% available blks */
- #define PBLK_USER_LOW_THRS 10 /* Aggressive GC at 10% available blocks */
- int rb_windows_pw; /* Number of rate windows in the write buffer
- * given as a power-of-2. This guarantees that
- * when user I/O is being rate limited, there
- * will be reserved enough space for the GC to
- * place its payload. A window is of
- * pblk->max_write_pgs size, which in NVMe is
- * 64, i.e., 256kb.
- */
- int rb_budget; /* Total number of entries available for I/O */
- int rb_user_max; /* Max buffer entries available for user I/O */
- int rb_gc_max; /* Max buffer entries available for GC I/O */
- int rb_gc_rsv; /* Reserved buffer entries for GC I/O */
- int rb_state; /* Rate-limiter current state */
- int rb_max_io; /* Maximum size for an I/O giving the config */
- atomic_t rb_user_cnt; /* User I/O buffer counter */
- atomic_t rb_gc_cnt; /* GC I/O buffer counter */
- atomic_t rb_space; /* Space limit in case of reaching capacity */
- int rsv_blocks; /* Reserved blocks for GC */
- int rb_user_active;
- int rb_gc_active;
- atomic_t werr_lines; /* Number of write error lines that needs gc */
- struct timer_list u_timer;
- unsigned long total_blocks;
- atomic_t free_blocks; /* Total number of free blocks (+ OP) */
- atomic_t free_user_blocks; /* Number of user free blocks (no OP) */
- };
- #define PBLK_LINE_EMPTY (~0U)
- enum {
- /* Line Types */
- PBLK_LINETYPE_FREE = 0,
- PBLK_LINETYPE_LOG = 1,
- PBLK_LINETYPE_DATA = 2,
- /* Line state */
- PBLK_LINESTATE_NEW = 9,
- PBLK_LINESTATE_FREE = 10,
- PBLK_LINESTATE_OPEN = 11,
- PBLK_LINESTATE_CLOSED = 12,
- PBLK_LINESTATE_GC = 13,
- PBLK_LINESTATE_BAD = 14,
- PBLK_LINESTATE_CORRUPT = 15,
- /* GC group */
- PBLK_LINEGC_NONE = 20,
- PBLK_LINEGC_EMPTY = 21,
- PBLK_LINEGC_LOW = 22,
- PBLK_LINEGC_MID = 23,
- PBLK_LINEGC_HIGH = 24,
- PBLK_LINEGC_FULL = 25,
- PBLK_LINEGC_WERR = 26
- };
- #define PBLK_MAGIC 0x70626c6b /*pblk*/
- /* emeta/smeta persistent storage format versions:
- * Changes in major version requires offline migration.
- * Changes in minor version are handled automatically during
- * recovery.
- */
- #define SMETA_VERSION_MAJOR (0)
- #define SMETA_VERSION_MINOR (1)
- #define EMETA_VERSION_MAJOR (0)
- #define EMETA_VERSION_MINOR (2)
- struct line_header {
- __le32 crc;
- __le32 identifier; /* pblk identifier */
- __u8 uuid[16]; /* instance uuid */
- __le16 type; /* line type */
- __u8 version_major; /* version major */
- __u8 version_minor; /* version minor */
- __le32 id; /* line id for current line */
- };
- struct line_smeta {
- struct line_header header;
- __le32 crc; /* Full structure including struct crc */
- /* Previous line metadata */
- __le32 prev_id; /* Line id for previous line */
- /* Current line metadata */
- __le64 seq_nr; /* Sequence number for current line */
- /* Active writers */
- __le32 window_wr_lun; /* Number of parallel LUNs to write */
- __le32 rsvd[2];
- __le64 lun_bitmap[];
- };
- /*
- * Metadata layout in media:
- * First sector:
- * 1. struct line_emeta
- * 2. bad block bitmap (u64 * window_wr_lun)
- * 3. write amplification counters
- * Mid sectors (start at lbas_sector):
- * 3. nr_lbas (u64) forming lba list
- * Last sectors (start at vsc_sector):
- * 4. u32 valid sector count (vsc) for all lines (~0U: free line)
- */
- struct line_emeta {
- struct line_header header;
- __le32 crc; /* Full structure including struct crc */
- /* Previous line metadata */
- __le32 prev_id; /* Line id for prev line */
- /* Current line metadata */
- __le64 seq_nr; /* Sequence number for current line */
- /* Active writers */
- __le32 window_wr_lun; /* Number of parallel LUNs to write */
- /* Bookkeeping for recovery */
- __le32 next_id; /* Line id for next line */
- __le64 nr_lbas; /* Number of lbas mapped in line */
- __le64 nr_valid_lbas; /* Number of valid lbas mapped in line */
- __le64 bb_bitmap[]; /* Updated bad block bitmap for line */
- };
- /* Write amplification counters stored on media */
- struct wa_counters {
- __le64 user; /* Number of user written sectors */
- __le64 gc; /* Number of sectors written by GC*/
- __le64 pad; /* Number of padded sectors */
- };
- struct pblk_emeta {
- struct line_emeta *buf; /* emeta buffer in media format */
- int mem; /* Write offset - points to next
- * writable entry in memory
- */
- atomic_t sync; /* Synced - backpointer that signals the
- * last entry that has been successfully
- * persisted to media
- */
- unsigned int nr_entries; /* Number of emeta entries */
- };
- struct pblk_smeta {
- struct line_smeta *buf; /* smeta buffer in persistent format */
- };
- struct pblk_w_err_gc {
- int has_write_err;
- int has_gc_err;
- __le64 *lba_list;
- };
- struct pblk_line {
- struct pblk *pblk;
- unsigned int id; /* Line number corresponds to the
- * block line
- */
- unsigned int seq_nr; /* Unique line sequence number */
- int state; /* PBLK_LINESTATE_X */
- int type; /* PBLK_LINETYPE_X */
- int gc_group; /* PBLK_LINEGC_X */
- struct list_head list; /* Free, GC lists */
- unsigned long *lun_bitmap; /* Bitmap for LUNs mapped in line */
- struct nvm_chk_meta *chks; /* Chunks forming line */
- struct pblk_smeta *smeta; /* Start metadata */
- struct pblk_emeta *emeta; /* End medatada */
- int meta_line; /* Metadata line id */
- int meta_distance; /* Distance between data and metadata */
- u64 emeta_ssec; /* Sector where emeta starts */
- unsigned int sec_in_line; /* Number of usable secs in line */
- atomic_t blk_in_line; /* Number of good blocks in line */
- unsigned long *blk_bitmap; /* Bitmap for valid/invalid blocks */
- unsigned long *erase_bitmap; /* Bitmap for erased blocks */
- unsigned long *map_bitmap; /* Bitmap for mapped sectors in line */
- unsigned long *invalid_bitmap; /* Bitmap for invalid sectors in line */
- atomic_t left_eblks; /* Blocks left for erasing */
- atomic_t left_seblks; /* Blocks left for sync erasing */
- int left_msecs; /* Sectors left for mapping */
- unsigned int cur_sec; /* Sector map pointer */
- unsigned int nr_valid_lbas; /* Number of valid lbas in line */
- __le32 *vsc; /* Valid sector count in line */
- struct kref ref; /* Write buffer L2P references */
- atomic_t sec_to_update; /* Outstanding L2P updates to ppa */
- struct pblk_w_err_gc *w_err_gc; /* Write error gc recovery metadata */
- spinlock_t lock; /* Necessary for invalid_bitmap only */
- };
- #define PBLK_DATA_LINES 4
- enum {
- PBLK_EMETA_TYPE_HEADER = 1, /* struct line_emeta first sector */
- PBLK_EMETA_TYPE_LLBA = 2, /* lba list - type: __le64 */
- PBLK_EMETA_TYPE_VSC = 3, /* vsc list - type: __le32 */
- };
- struct pblk_line_mgmt {
- int nr_lines; /* Total number of full lines */
- int nr_free_lines; /* Number of full lines in free list */
- /* Free lists - use free_lock */
- struct list_head free_list; /* Full lines ready to use */
- struct list_head corrupt_list; /* Full lines corrupted */
- struct list_head bad_list; /* Full lines bad */
- /* GC lists - use gc_lock */
- struct list_head *gc_lists[PBLK_GC_NR_LISTS];
- struct list_head gc_high_list; /* Full lines ready to GC, high isc */
- struct list_head gc_mid_list; /* Full lines ready to GC, mid isc */
- struct list_head gc_low_list; /* Full lines ready to GC, low isc */
- struct list_head gc_werr_list; /* Write err recovery list */
- struct list_head gc_full_list; /* Full lines ready to GC, no valid */
- struct list_head gc_empty_list; /* Full lines close, all valid */
- struct pblk_line *log_line; /* Current FTL log line */
- struct pblk_line *data_line; /* Current data line */
- struct pblk_line *log_next; /* Next FTL log line */
- struct pblk_line *data_next; /* Next data line */
- struct list_head emeta_list; /* Lines queued to schedule emeta */
- __le32 *vsc_list; /* Valid sector counts for all lines */
- /* Pre-allocated metadata for data lines */
- struct pblk_smeta *sline_meta[PBLK_DATA_LINES];
- struct pblk_emeta *eline_meta[PBLK_DATA_LINES];
- unsigned long meta_bitmap;
- /* Cache and mempool for map/invalid bitmaps */
- struct kmem_cache *bitmap_cache;
- mempool_t *bitmap_pool;
- /* Helpers for fast bitmap calculations */
- unsigned long *bb_template;
- unsigned long *bb_aux;
- unsigned long d_seq_nr; /* Data line unique sequence number */
- unsigned long l_seq_nr; /* Log line unique sequence number */
- spinlock_t free_lock;
- spinlock_t close_lock;
- spinlock_t gc_lock;
- };
- struct pblk_line_meta {
- unsigned int smeta_len; /* Total length for smeta */
- unsigned int smeta_sec; /* Sectors needed for smeta */
- unsigned int emeta_len[4]; /* Lengths for emeta:
- * [0]: Total
- * [1]: struct line_emeta +
- * bb_bitmap + struct wa_counters
- * [2]: L2P portion
- * [3]: vsc
- */
- unsigned int emeta_sec[4]; /* Sectors needed for emeta. Same layout
- * as emeta_len
- */
- unsigned int emeta_bb; /* Boundary for bb that affects emeta */
- unsigned int vsc_list_len; /* Length for vsc list */
- unsigned int sec_bitmap_len; /* Length for sector bitmap in line */
- unsigned int blk_bitmap_len; /* Length for block bitmap in line */
- unsigned int lun_bitmap_len; /* Length for lun bitmap in line */
- unsigned int blk_per_line; /* Number of blocks in a full line */
- unsigned int sec_per_line; /* Number of sectors in a line */
- unsigned int dsec_per_line; /* Number of data sectors in a line */
- unsigned int min_blk_line; /* Min. number of good blocks in line */
- unsigned int mid_thrs; /* Threshold for GC mid list */
- unsigned int high_thrs; /* Threshold for GC high list */
- unsigned int meta_distance; /* Distance between data and metadata */
- };
- enum {
- PBLK_STATE_RUNNING = 0,
- PBLK_STATE_STOPPING = 1,
- PBLK_STATE_RECOVERING = 2,
- PBLK_STATE_STOPPED = 3,
- };
- /* Internal format to support not power-of-2 device formats */
- struct pblk_addrf {
- /* gen to dev */
- int sec_stripe;
- int ch_stripe;
- int lun_stripe;
- /* dev to gen */
- int sec_lun_stripe;
- int sec_ws_stripe;
- };
- struct pblk {
- struct nvm_tgt_dev *dev;
- struct gendisk *disk;
- struct kobject kobj;
- struct pblk_lun *luns;
- struct pblk_line *lines; /* Line array */
- struct pblk_line_mgmt l_mg; /* Line management */
- struct pblk_line_meta lm; /* Line metadata */
- struct nvm_addrf addrf; /* Aligned address format */
- struct pblk_addrf uaddrf; /* Unaligned address format */
- int addrf_len;
- struct pblk_rb rwb;
- int state; /* pblk line state */
- int min_write_pgs; /* Minimum amount of pages required by controller */
- int min_write_pgs_data; /* Minimum amount of payload pages */
- int max_write_pgs; /* Maximum amount of pages supported by controller */
- int oob_meta_size; /* Size of OOB sector metadata */
- sector_t capacity; /* Device capacity when bad blocks are subtracted */
- int op; /* Percentage of device used for over-provisioning */
- int op_blks; /* Number of blocks used for over-provisioning */
- /* pblk provisioning values. Used by rate limiter */
- struct pblk_rl rl;
- int sec_per_write;
- guid_t instance_uuid;
- /* Persistent write amplification counters, 4kb sector I/Os */
- atomic64_t user_wa; /* Sectors written by user */
- atomic64_t gc_wa; /* Sectors written by GC */
- atomic64_t pad_wa; /* Padded sectors written */
- /* Reset values for delta write amplification measurements */
- u64 user_rst_wa;
- u64 gc_rst_wa;
- u64 pad_rst_wa;
- /* Counters used for calculating padding distribution */
- atomic64_t *pad_dist; /* Padding distribution buckets */
- u64 nr_flush_rst; /* Flushes reset value for pad dist.*/
- atomic64_t nr_flush; /* Number of flush/fua I/O */
- #ifdef CONFIG_NVM_PBLK_DEBUG
- /* Non-persistent debug counters, 4kb sector I/Os */
- atomic_long_t inflight_writes; /* Inflight writes (user and gc) */
- atomic_long_t padded_writes; /* Sectors padded due to flush/fua */
- atomic_long_t padded_wb; /* Sectors padded in write buffer */
- atomic_long_t req_writes; /* Sectors stored on write buffer */
- atomic_long_t sub_writes; /* Sectors submitted from buffer */
- atomic_long_t sync_writes; /* Sectors synced to media */
- atomic_long_t inflight_reads; /* Inflight sector read requests */
- atomic_long_t cache_reads; /* Read requests that hit the cache */
- atomic_long_t sync_reads; /* Completed sector read requests */
- atomic_long_t recov_writes; /* Sectors submitted from recovery */
- atomic_long_t recov_gc_writes; /* Sectors submitted from write GC */
- atomic_long_t recov_gc_reads; /* Sectors submitted from read GC */
- #endif
- spinlock_t lock;
- atomic_long_t read_failed;
- atomic_long_t read_empty;
- atomic_long_t read_high_ecc;
- atomic_long_t read_failed_gc;
- atomic_long_t write_failed;
- atomic_long_t erase_failed;
- atomic_t inflight_io; /* General inflight I/O counter */
- struct task_struct *writer_ts;
- /* Simple translation map of logical addresses to physical addresses.
- * The logical addresses is known by the host system, while the physical
- * addresses are used when writing to the disk block device.
- */
- unsigned char *trans_map;
- spinlock_t trans_lock;
- struct list_head compl_list;
- spinlock_t resubmit_lock; /* Resubmit list lock */
- struct list_head resubmit_list; /* Resubmit list for failed writes*/
- mempool_t page_bio_pool;
- mempool_t gen_ws_pool;
- mempool_t rec_pool;
- mempool_t r_rq_pool;
- mempool_t w_rq_pool;
- mempool_t e_rq_pool;
- struct workqueue_struct *close_wq;
- struct workqueue_struct *bb_wq;
- struct workqueue_struct *r_end_wq;
- struct timer_list wtimer;
- struct pblk_gc gc;
- };
- struct pblk_line_ws {
- struct pblk *pblk;
- struct pblk_line *line;
- void *priv;
- struct work_struct ws;
- };
- #define pblk_g_rq_size (sizeof(struct nvm_rq) + sizeof(struct pblk_g_ctx))
- #define pblk_w_rq_size (sizeof(struct nvm_rq) + sizeof(struct pblk_c_ctx))
- #define pblk_err(pblk, fmt, ...) \
- pr_err("pblk %s: " fmt, pblk->disk->disk_name, ##__VA_ARGS__)
- #define pblk_info(pblk, fmt, ...) \
- pr_info("pblk %s: " fmt, pblk->disk->disk_name, ##__VA_ARGS__)
- #define pblk_warn(pblk, fmt, ...) \
- pr_warn("pblk %s: " fmt, pblk->disk->disk_name, ##__VA_ARGS__)
- #define pblk_debug(pblk, fmt, ...) \
- pr_debug("pblk %s: " fmt, pblk->disk->disk_name, ##__VA_ARGS__)
- /*
- * pblk ring buffer operations
- */
- int pblk_rb_init(struct pblk_rb *rb, unsigned int size, unsigned int threshold,
- unsigned int seg_sz);
- int pblk_rb_may_write_user(struct pblk_rb *rb, struct bio *bio,
- unsigned int nr_entries, unsigned int *pos);
- int pblk_rb_may_write_gc(struct pblk_rb *rb, unsigned int nr_entries,
- unsigned int *pos);
- void pblk_rb_write_entry_user(struct pblk_rb *rb, void *data,
- struct pblk_w_ctx w_ctx, unsigned int pos);
- void pblk_rb_write_entry_gc(struct pblk_rb *rb, void *data,
- struct pblk_w_ctx w_ctx, struct pblk_line *line,
- u64 paddr, unsigned int pos);
- struct pblk_w_ctx *pblk_rb_w_ctx(struct pblk_rb *rb, unsigned int pos);
- void pblk_rb_flush(struct pblk_rb *rb);
- void pblk_rb_sync_l2p(struct pblk_rb *rb);
- unsigned int pblk_rb_read_to_bio(struct pblk_rb *rb, struct nvm_rq *rqd,
- unsigned int pos, unsigned int nr_entries,
- unsigned int count);
- int pblk_rb_copy_to_bio(struct pblk_rb *rb, struct bio *bio, sector_t lba,
- struct ppa_addr ppa);
- unsigned int pblk_rb_read_commit(struct pblk_rb *rb, unsigned int entries);
- unsigned int pblk_rb_sync_init(struct pblk_rb *rb, unsigned long *flags);
- unsigned int pblk_rb_sync_advance(struct pblk_rb *rb, unsigned int nr_entries);
- unsigned int pblk_rb_ptr_wrap(struct pblk_rb *rb, unsigned int p,
- unsigned int nr_entries);
- void pblk_rb_sync_end(struct pblk_rb *rb, unsigned long *flags);
- unsigned int pblk_rb_flush_point_count(struct pblk_rb *rb);
- unsigned int pblk_rb_read_count(struct pblk_rb *rb);
- unsigned int pblk_rb_sync_count(struct pblk_rb *rb);
- unsigned int pblk_rb_wrap_pos(struct pblk_rb *rb, unsigned int pos);
- int pblk_rb_tear_down_check(struct pblk_rb *rb);
- int pblk_rb_pos_oob(struct pblk_rb *rb, u64 pos);
- void pblk_rb_free(struct pblk_rb *rb);
- ssize_t pblk_rb_sysfs(struct pblk_rb *rb, char *buf);
- /*
- * pblk core
- */
- struct nvm_rq *pblk_alloc_rqd(struct pblk *pblk, int type);
- void pblk_free_rqd(struct pblk *pblk, struct nvm_rq *rqd, int type);
- int pblk_alloc_rqd_meta(struct pblk *pblk, struct nvm_rq *rqd);
- void pblk_free_rqd_meta(struct pblk *pblk, struct nvm_rq *rqd);
- void pblk_set_sec_per_write(struct pblk *pblk, int sec_per_write);
- int pblk_setup_w_rec_rq(struct pblk *pblk, struct nvm_rq *rqd,
- struct pblk_c_ctx *c_ctx);
- void pblk_discard(struct pblk *pblk, struct bio *bio);
- struct nvm_chk_meta *pblk_get_chunk_meta(struct pblk *pblk);
- struct nvm_chk_meta *pblk_chunk_get_off(struct pblk *pblk,
- struct nvm_chk_meta *lp,
- struct ppa_addr ppa);
- void pblk_log_write_err(struct pblk *pblk, struct nvm_rq *rqd);
- void pblk_log_read_err(struct pblk *pblk, struct nvm_rq *rqd);
- int pblk_submit_io(struct pblk *pblk, struct nvm_rq *rqd, void *buf);
- int pblk_submit_io_sync(struct pblk *pblk, struct nvm_rq *rqd, void *buf);
- int pblk_submit_meta_io(struct pblk *pblk, struct pblk_line *meta_line);
- void pblk_check_chunk_state_update(struct pblk *pblk, struct nvm_rq *rqd);
- struct pblk_line *pblk_line_get(struct pblk *pblk);
- struct pblk_line *pblk_line_get_first_data(struct pblk *pblk);
- struct pblk_line *pblk_line_replace_data(struct pblk *pblk);
- void pblk_ppa_to_line_put(struct pblk *pblk, struct ppa_addr ppa);
- void pblk_rq_to_line_put(struct pblk *pblk, struct nvm_rq *rqd);
- int pblk_line_recov_alloc(struct pblk *pblk, struct pblk_line *line);
- void pblk_line_recov_close(struct pblk *pblk, struct pblk_line *line);
- struct pblk_line *pblk_line_get_data(struct pblk *pblk);
- struct pblk_line *pblk_line_get_erase(struct pblk *pblk);
- int pblk_line_erase(struct pblk *pblk, struct pblk_line *line);
- int pblk_line_is_full(struct pblk_line *line);
- void pblk_line_free(struct pblk_line *line);
- void pblk_line_close_meta(struct pblk *pblk, struct pblk_line *line);
- void pblk_line_close(struct pblk *pblk, struct pblk_line *line);
- void pblk_line_close_ws(struct work_struct *work);
- void pblk_pipeline_stop(struct pblk *pblk);
- void __pblk_pipeline_stop(struct pblk *pblk);
- void __pblk_pipeline_flush(struct pblk *pblk);
- void pblk_gen_run_ws(struct pblk *pblk, struct pblk_line *line, void *priv,
- void (*work)(struct work_struct *), gfp_t gfp_mask,
- struct workqueue_struct *wq);
- u64 pblk_line_smeta_start(struct pblk *pblk, struct pblk_line *line);
- int pblk_line_smeta_read(struct pblk *pblk, struct pblk_line *line);
- int pblk_line_emeta_read(struct pblk *pblk, struct pblk_line *line,
- void *emeta_buf);
- int pblk_blk_erase_async(struct pblk *pblk, struct ppa_addr erase_ppa);
- void pblk_line_put(struct kref *ref);
- void pblk_line_put_wq(struct kref *ref);
- struct list_head *pblk_line_gc_list(struct pblk *pblk, struct pblk_line *line);
- u64 pblk_lookup_page(struct pblk *pblk, struct pblk_line *line);
- void pblk_dealloc_page(struct pblk *pblk, struct pblk_line *line, int nr_secs);
- u64 pblk_alloc_page(struct pblk *pblk, struct pblk_line *line, int nr_secs);
- u64 __pblk_alloc_page(struct pblk *pblk, struct pblk_line *line, int nr_secs);
- int pblk_calc_secs(struct pblk *pblk, unsigned long secs_avail,
- unsigned long secs_to_flush, bool skip_meta);
- void pblk_down_rq(struct pblk *pblk, struct ppa_addr ppa,
- unsigned long *lun_bitmap);
- void pblk_down_chunk(struct pblk *pblk, struct ppa_addr ppa);
- void pblk_up_chunk(struct pblk *pblk, struct ppa_addr ppa);
- void pblk_up_rq(struct pblk *pblk, unsigned long *lun_bitmap);
- int pblk_bio_add_pages(struct pblk *pblk, struct bio *bio, gfp_t flags,
- int nr_pages);
- void pblk_bio_free_pages(struct pblk *pblk, struct bio *bio, int off,
- int nr_pages);
- void pblk_map_invalidate(struct pblk *pblk, struct ppa_addr ppa);
- void __pblk_map_invalidate(struct pblk *pblk, struct pblk_line *line,
- u64 paddr);
- void pblk_update_map(struct pblk *pblk, sector_t lba, struct ppa_addr ppa);
- void pblk_update_map_cache(struct pblk *pblk, sector_t lba,
- struct ppa_addr ppa);
- void pblk_update_map_dev(struct pblk *pblk, sector_t lba,
- struct ppa_addr ppa, struct ppa_addr entry_line);
- int pblk_update_map_gc(struct pblk *pblk, sector_t lba, struct ppa_addr ppa,
- struct pblk_line *gc_line, u64 paddr);
- void pblk_lookup_l2p_rand(struct pblk *pblk, struct ppa_addr *ppas,
- u64 *lba_list, int nr_secs);
- int pblk_lookup_l2p_seq(struct pblk *pblk, struct ppa_addr *ppas,
- sector_t blba, int nr_secs, bool *from_cache);
- void *pblk_get_meta_for_writes(struct pblk *pblk, struct nvm_rq *rqd);
- void pblk_get_packed_meta(struct pblk *pblk, struct nvm_rq *rqd);
- /*
- * pblk user I/O write path
- */
- void pblk_write_to_cache(struct pblk *pblk, struct bio *bio,
- unsigned long flags);
- int pblk_write_gc_to_cache(struct pblk *pblk, struct pblk_gc_rq *gc_rq);
- /*
- * pblk map
- */
- int pblk_map_erase_rq(struct pblk *pblk, struct nvm_rq *rqd,
- unsigned int sentry, unsigned long *lun_bitmap,
- unsigned int valid_secs, struct ppa_addr *erase_ppa);
- int pblk_map_rq(struct pblk *pblk, struct nvm_rq *rqd, unsigned int sentry,
- unsigned long *lun_bitmap, unsigned int valid_secs,
- unsigned int off);
- /*
- * pblk write thread
- */
- int pblk_write_ts(void *data);
- void pblk_write_timer_fn(struct timer_list *t);
- void pblk_write_should_kick(struct pblk *pblk);
- void pblk_write_kick(struct pblk *pblk);
- /*
- * pblk read path
- */
- extern struct bio_set pblk_bio_set;
- void pblk_submit_read(struct pblk *pblk, struct bio *bio);
- int pblk_submit_read_gc(struct pblk *pblk, struct pblk_gc_rq *gc_rq);
- /*
- * pblk recovery
- */
- struct pblk_line *pblk_recov_l2p(struct pblk *pblk);
- int pblk_recov_pad(struct pblk *pblk);
- int pblk_recov_check_emeta(struct pblk *pblk, struct line_emeta *emeta);
- /*
- * pblk gc
- */
- #define PBLK_GC_MAX_READERS 8 /* Max number of outstanding GC reader jobs */
- #define PBLK_GC_RQ_QD 128 /* Queue depth for inflight GC requests */
- #define PBLK_GC_L_QD 4 /* Queue depth for inflight GC lines */
- int pblk_gc_init(struct pblk *pblk);
- void pblk_gc_exit(struct pblk *pblk, bool graceful);
- void pblk_gc_should_start(struct pblk *pblk);
- void pblk_gc_should_stop(struct pblk *pblk);
- void pblk_gc_should_kick(struct pblk *pblk);
- void pblk_gc_free_full_lines(struct pblk *pblk);
- void pblk_gc_sysfs_state_show(struct pblk *pblk, int *gc_enabled,
- int *gc_active);
- int pblk_gc_sysfs_force(struct pblk *pblk, int force);
- void pblk_put_line_back(struct pblk *pblk, struct pblk_line *line);
- /*
- * pblk rate limiter
- */
- void pblk_rl_init(struct pblk_rl *rl, int budget, int threshold);
- void pblk_rl_free(struct pblk_rl *rl);
- void pblk_rl_update_rates(struct pblk_rl *rl);
- int pblk_rl_high_thrs(struct pblk_rl *rl);
- unsigned long pblk_rl_nr_free_blks(struct pblk_rl *rl);
- unsigned long pblk_rl_nr_user_free_blks(struct pblk_rl *rl);
- int pblk_rl_user_may_insert(struct pblk_rl *rl, int nr_entries);
- void pblk_rl_inserted(struct pblk_rl *rl, int nr_entries);
- void pblk_rl_user_in(struct pblk_rl *rl, int nr_entries);
- int pblk_rl_gc_may_insert(struct pblk_rl *rl, int nr_entries);
- void pblk_rl_gc_in(struct pblk_rl *rl, int nr_entries);
- void pblk_rl_out(struct pblk_rl *rl, int nr_user, int nr_gc);
- int pblk_rl_max_io(struct pblk_rl *rl);
- void pblk_rl_free_lines_inc(struct pblk_rl *rl, struct pblk_line *line);
- void pblk_rl_free_lines_dec(struct pblk_rl *rl, struct pblk_line *line,
- bool used);
- int pblk_rl_is_limit(struct pblk_rl *rl);
- void pblk_rl_werr_line_in(struct pblk_rl *rl);
- void pblk_rl_werr_line_out(struct pblk_rl *rl);
- /*
- * pblk sysfs
- */
- int pblk_sysfs_init(struct gendisk *tdisk);
- void pblk_sysfs_exit(struct gendisk *tdisk);
- static inline struct nvm_rq *nvm_rq_from_c_ctx(void *c_ctx)
- {
- return c_ctx - sizeof(struct nvm_rq);
- }
- static inline void *emeta_to_bb(struct line_emeta *emeta)
- {
- return emeta->bb_bitmap;
- }
- static inline void *emeta_to_wa(struct pblk_line_meta *lm,
- struct line_emeta *emeta)
- {
- return emeta->bb_bitmap + lm->blk_bitmap_len;
- }
- static inline void *emeta_to_lbas(struct pblk *pblk, struct line_emeta *emeta)
- {
- return ((void *)emeta + pblk->lm.emeta_len[1]);
- }
- static inline void *emeta_to_vsc(struct pblk *pblk, struct line_emeta *emeta)
- {
- return (emeta_to_lbas(pblk, emeta) + pblk->lm.emeta_len[2]);
- }
- static inline int pblk_line_vsc(struct pblk_line *line)
- {
- return le32_to_cpu(*line->vsc);
- }
- static inline int pblk_ppa_to_line_id(struct ppa_addr p)
- {
- return p.a.blk;
- }
- static inline struct pblk_line *pblk_ppa_to_line(struct pblk *pblk,
- struct ppa_addr p)
- {
- return &pblk->lines[pblk_ppa_to_line_id(p)];
- }
- static inline int pblk_ppa_to_pos(struct nvm_geo *geo, struct ppa_addr p)
- {
- return p.a.lun * geo->num_ch + p.a.ch;
- }
- static inline struct ppa_addr addr_to_gen_ppa(struct pblk *pblk, u64 paddr,
- u64 line_id)
- {
- struct nvm_tgt_dev *dev = pblk->dev;
- struct nvm_geo *geo = &dev->geo;
- struct ppa_addr ppa;
- if (geo->version == NVM_OCSSD_SPEC_12) {
- struct nvm_addrf_12 *ppaf = (struct nvm_addrf_12 *)&pblk->addrf;
- ppa.ppa = 0;
- ppa.g.blk = line_id;
- ppa.g.pg = (paddr & ppaf->pg_mask) >> ppaf->pg_offset;
- ppa.g.lun = (paddr & ppaf->lun_mask) >> ppaf->lun_offset;
- ppa.g.ch = (paddr & ppaf->ch_mask) >> ppaf->ch_offset;
- ppa.g.pl = (paddr & ppaf->pln_mask) >> ppaf->pln_offset;
- ppa.g.sec = (paddr & ppaf->sec_mask) >> ppaf->sec_offset;
- } else {
- struct pblk_addrf *uaddrf = &pblk->uaddrf;
- int secs, chnls, luns;
- ppa.ppa = 0;
- ppa.m.chk = line_id;
- paddr = div_u64_rem(paddr, uaddrf->sec_stripe, &secs);
- ppa.m.sec = secs;
- paddr = div_u64_rem(paddr, uaddrf->ch_stripe, &chnls);
- ppa.m.grp = chnls;
- paddr = div_u64_rem(paddr, uaddrf->lun_stripe, &luns);
- ppa.m.pu = luns;
- ppa.m.sec += uaddrf->sec_stripe * paddr;
- }
- return ppa;
- }
- static inline struct nvm_chk_meta *pblk_dev_ppa_to_chunk(struct pblk *pblk,
- struct ppa_addr p)
- {
- struct nvm_tgt_dev *dev = pblk->dev;
- struct nvm_geo *geo = &dev->geo;
- struct pblk_line *line = pblk_ppa_to_line(pblk, p);
- int pos = pblk_ppa_to_pos(geo, p);
- return &line->chks[pos];
- }
- static inline u64 pblk_dev_ppa_to_chunk_addr(struct pblk *pblk,
- struct ppa_addr p)
- {
- struct nvm_tgt_dev *dev = pblk->dev;
- return dev_to_chunk_addr(dev->parent, &pblk->addrf, p);
- }
- static inline u64 pblk_dev_ppa_to_line_addr(struct pblk *pblk,
- struct ppa_addr p)
- {
- struct nvm_tgt_dev *dev = pblk->dev;
- struct nvm_geo *geo = &dev->geo;
- u64 paddr;
- if (geo->version == NVM_OCSSD_SPEC_12) {
- struct nvm_addrf_12 *ppaf = (struct nvm_addrf_12 *)&pblk->addrf;
- paddr = (u64)p.g.ch << ppaf->ch_offset;
- paddr |= (u64)p.g.lun << ppaf->lun_offset;
- paddr |= (u64)p.g.pg << ppaf->pg_offset;
- paddr |= (u64)p.g.pl << ppaf->pln_offset;
- paddr |= (u64)p.g.sec << ppaf->sec_offset;
- } else {
- struct pblk_addrf *uaddrf = &pblk->uaddrf;
- u64 secs = p.m.sec;
- int sec_stripe;
- paddr = (u64)p.m.grp * uaddrf->sec_stripe;
- paddr += (u64)p.m.pu * uaddrf->sec_lun_stripe;
- secs = div_u64_rem(secs, uaddrf->sec_stripe, &sec_stripe);
- paddr += secs * uaddrf->sec_ws_stripe;
- paddr += sec_stripe;
- }
- return paddr;
- }
- static inline struct ppa_addr pblk_ppa32_to_ppa64(struct pblk *pblk, u32 ppa32)
- {
- struct nvm_tgt_dev *dev = pblk->dev;
- return nvm_ppa32_to_ppa64(dev->parent, &pblk->addrf, ppa32);
- }
- static inline u32 pblk_ppa64_to_ppa32(struct pblk *pblk, struct ppa_addr ppa64)
- {
- struct nvm_tgt_dev *dev = pblk->dev;
- return nvm_ppa64_to_ppa32(dev->parent, &pblk->addrf, ppa64);
- }
- static inline struct ppa_addr pblk_trans_map_get(struct pblk *pblk,
- sector_t lba)
- {
- struct ppa_addr ppa;
- if (pblk->addrf_len < 32) {
- u32 *map = (u32 *)pblk->trans_map;
- ppa = pblk_ppa32_to_ppa64(pblk, map[lba]);
- } else {
- struct ppa_addr *map = (struct ppa_addr *)pblk->trans_map;
- ppa = map[lba];
- }
- return ppa;
- }
- static inline void pblk_trans_map_set(struct pblk *pblk, sector_t lba,
- struct ppa_addr ppa)
- {
- if (pblk->addrf_len < 32) {
- u32 *map = (u32 *)pblk->trans_map;
- map[lba] = pblk_ppa64_to_ppa32(pblk, ppa);
- } else {
- u64 *map = (u64 *)pblk->trans_map;
- map[lba] = ppa.ppa;
- }
- }
- static inline int pblk_ppa_empty(struct ppa_addr ppa_addr)
- {
- return (ppa_addr.ppa == ADDR_EMPTY);
- }
- static inline void pblk_ppa_set_empty(struct ppa_addr *ppa_addr)
- {
- ppa_addr->ppa = ADDR_EMPTY;
- }
- static inline bool pblk_ppa_comp(struct ppa_addr lppa, struct ppa_addr rppa)
- {
- return (lppa.ppa == rppa.ppa);
- }
- static inline int pblk_addr_in_cache(struct ppa_addr ppa)
- {
- return (ppa.ppa != ADDR_EMPTY && ppa.c.is_cached);
- }
- static inline int pblk_addr_to_cacheline(struct ppa_addr ppa)
- {
- return ppa.c.line;
- }
- static inline struct ppa_addr pblk_cacheline_to_addr(int addr)
- {
- struct ppa_addr p;
- p.c.line = addr;
- p.c.is_cached = 1;
- return p;
- }
- static inline u32 pblk_calc_meta_header_crc(struct pblk *pblk,
- struct line_header *header)
- {
- u32 crc = ~(u32)0;
- crc = crc32_le(crc, (unsigned char *)header + sizeof(crc),
- sizeof(struct line_header) - sizeof(crc));
- return crc;
- }
- static inline u32 pblk_calc_smeta_crc(struct pblk *pblk,
- struct line_smeta *smeta)
- {
- struct pblk_line_meta *lm = &pblk->lm;
- u32 crc = ~(u32)0;
- crc = crc32_le(crc, (unsigned char *)smeta +
- sizeof(struct line_header) + sizeof(crc),
- lm->smeta_len -
- sizeof(struct line_header) - sizeof(crc));
- return crc;
- }
- static inline u32 pblk_calc_emeta_crc(struct pblk *pblk,
- struct line_emeta *emeta)
- {
- struct pblk_line_meta *lm = &pblk->lm;
- u32 crc = ~(u32)0;
- crc = crc32_le(crc, (unsigned char *)emeta +
- sizeof(struct line_header) + sizeof(crc),
- lm->emeta_len[0] -
- sizeof(struct line_header) - sizeof(crc));
- return crc;
- }
- static inline int pblk_io_aligned(struct pblk *pblk, int nr_secs)
- {
- return !(nr_secs % pblk->min_write_pgs);
- }
- #ifdef CONFIG_NVM_PBLK_DEBUG
- static inline void print_ppa(struct pblk *pblk, struct ppa_addr *p,
- char *msg, int error)
- {
- struct nvm_geo *geo = &pblk->dev->geo;
- if (p->c.is_cached) {
- pblk_err(pblk, "ppa: (%s: %x) cache line: %llu\n",
- msg, error, (u64)p->c.line);
- } else if (geo->version == NVM_OCSSD_SPEC_12) {
- pblk_err(pblk, "ppa: (%s: %x):ch:%d,lun:%d,blk:%d,pg:%d,pl:%d,sec:%d\n",
- msg, error,
- p->g.ch, p->g.lun, p->g.blk,
- p->g.pg, p->g.pl, p->g.sec);
- } else {
- pblk_err(pblk, "ppa: (%s: %x):ch:%d,lun:%d,chk:%d,sec:%d\n",
- msg, error,
- p->m.grp, p->m.pu, p->m.chk, p->m.sec);
- }
- }
- static inline void pblk_print_failed_rqd(struct pblk *pblk, struct nvm_rq *rqd,
- int error)
- {
- int bit = -1;
- if (rqd->nr_ppas == 1) {
- print_ppa(pblk, &rqd->ppa_addr, "rqd", error);
- return;
- }
- while ((bit = find_next_bit((void *)&rqd->ppa_status, rqd->nr_ppas,
- bit + 1)) < rqd->nr_ppas) {
- print_ppa(pblk, &rqd->ppa_list[bit], "rqd", error);
- }
- pblk_err(pblk, "error:%d, ppa_status:%llx\n", error, rqd->ppa_status);
- }
- static inline int pblk_boundary_ppa_checks(struct nvm_tgt_dev *tgt_dev,
- struct ppa_addr *ppas, int nr_ppas)
- {
- struct nvm_geo *geo = &tgt_dev->geo;
- struct ppa_addr *ppa;
- int i;
- for (i = 0; i < nr_ppas; i++) {
- ppa = &ppas[i];
- if (geo->version == NVM_OCSSD_SPEC_12) {
- if (!ppa->c.is_cached &&
- ppa->g.ch < geo->num_ch &&
- ppa->g.lun < geo->num_lun &&
- ppa->g.pl < geo->num_pln &&
- ppa->g.blk < geo->num_chk &&
- ppa->g.pg < geo->num_pg &&
- ppa->g.sec < geo->ws_min)
- continue;
- } else {
- if (!ppa->c.is_cached &&
- ppa->m.grp < geo->num_ch &&
- ppa->m.pu < geo->num_lun &&
- ppa->m.chk < geo->num_chk &&
- ppa->m.sec < geo->clba)
- continue;
- }
- print_ppa(tgt_dev->q->queuedata, ppa, "boundary", i);
- return 1;
- }
- return 0;
- }
- static inline int pblk_check_io(struct pblk *pblk, struct nvm_rq *rqd)
- {
- struct nvm_tgt_dev *dev = pblk->dev;
- struct ppa_addr *ppa_list = nvm_rq_to_ppa_list(rqd);
- if (pblk_boundary_ppa_checks(dev, ppa_list, rqd->nr_ppas)) {
- WARN_ON(1);
- return -EINVAL;
- }
- if (rqd->opcode == NVM_OP_PWRITE) {
- struct pblk_line *line;
- int i;
- for (i = 0; i < rqd->nr_ppas; i++) {
- line = pblk_ppa_to_line(pblk, ppa_list[i]);
- spin_lock(&line->lock);
- if (line->state != PBLK_LINESTATE_OPEN) {
- pblk_err(pblk, "bad ppa: line:%d,state:%d\n",
- line->id, line->state);
- WARN_ON(1);
- spin_unlock(&line->lock);
- return -EINVAL;
- }
- spin_unlock(&line->lock);
- }
- }
- return 0;
- }
- #endif
- static inline int pblk_boundary_paddr_checks(struct pblk *pblk, u64 paddr)
- {
- struct pblk_line_meta *lm = &pblk->lm;
- if (paddr > lm->sec_per_line)
- return 1;
- return 0;
- }
- static inline unsigned int pblk_get_bi_idx(struct bio *bio)
- {
- return bio->bi_iter.bi_idx;
- }
- static inline sector_t pblk_get_lba(struct bio *bio)
- {
- return bio->bi_iter.bi_sector / NR_PHY_IN_LOG;
- }
- static inline unsigned int pblk_get_secs(struct bio *bio)
- {
- return bio->bi_iter.bi_size / PBLK_EXPOSED_PAGE_SIZE;
- }
- static inline char *pblk_disk_name(struct pblk *pblk)
- {
- struct gendisk *disk = pblk->disk;
- return disk->disk_name;
- }
- static inline unsigned int pblk_get_min_chks(struct pblk *pblk)
- {
- struct pblk_line_meta *lm = &pblk->lm;
- /* In a worst-case scenario every line will have OP invalid sectors.
- * We will then need a minimum of 1/OP lines to free up a single line
- */
- return DIV_ROUND_UP(100, pblk->op) * lm->blk_per_line;
- }
- static inline struct pblk_sec_meta *pblk_get_meta(struct pblk *pblk,
- void *meta, int index)
- {
- return meta +
- max_t(int, sizeof(struct pblk_sec_meta), pblk->oob_meta_size)
- * index;
- }
- static inline int pblk_dma_meta_size(struct pblk *pblk)
- {
- return max_t(int, sizeof(struct pblk_sec_meta), pblk->oob_meta_size)
- * NVM_MAX_VLBA;
- }
- static inline int pblk_is_oob_meta_supported(struct pblk *pblk)
- {
- return pblk->oob_meta_size >= sizeof(struct pblk_sec_meta);
- }
- #endif /* PBLK_H_ */
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