[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/drivers/lightnvm/pblk.h b/src/kernel/linux/v4.14/drivers/lightnvm/pblk.h
new file mode 100644
index 0000000..053164d
--- /dev/null
+++ b/src/kernel/linux/v4.14/drivers/lightnvm/pblk.h
@@ -0,0 +1,1269 @@
+/*
+ * 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_MAX_REQ_ADDRS (64)
+#define PBLK_MAX_REQ_ADDRS_PW (6)
+
+#define PBLK_WS_POOL_SIZE (128)
+#define PBLK_META_POOL_SIZE (128)
+#define PBLK_READ_REQ_POOL_SIZE (1024)
+
+#define PBLK_NR_CLOSE_JOBS (4)
+
+#define PBLK_CACHE_NAME_LEN (DISK_NAME_LEN + 16)
+
+#define PBLK_COMMAND_TIMEOUT_MS 30000
+
+/* Max 512 LUNs per device */
+#define PBLK_MAX_LUNS_BITMAP (4)
+
+#define NR_PHY_IN_LOG (PBLK_EXPOSED_PAGE_SIZE / PBLK_SECTOR)
+
+#define pblk_for_each_lun(pblk, rlun, i) \
+ for ((i) = 0, rlun = &(pblk)->luns[0]; \
+ (i) < (pblk)->nr_luns; (i)++, rlun = &(pblk)->luns[(i)])
+
+#define ERASE 2 /* READ = 0, WRITE = 1 */
+
+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,
+};
+
+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 3
+
+enum {
+ PBLK_RL_HIGH = 1,
+ PBLK_RL_MID = 2,
+ PBLK_RL_LOW = 3,
+};
+
+#define pblk_dma_meta_size (sizeof(struct pblk_sec_meta) * PBLK_MAX_REQ_ADDRS)
+
+/* 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;
+};
+
+/* generic context */
+struct pblk_g_ctx {
+ void *private;
+};
+
+/* 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 list_head failed;
+ 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 sync_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
+ */
+
+ struct list_head pages; /* List of data pages */
+
+ spinlock_t w_lock; /* Write lock */
+ spinlock_t s_lock; /* Sync lock */
+
+#ifdef CONFIG_NVM_DEBUG
+ atomic_t inflight_sync_point; /* Not served REQ_FLUSH | REQ_FUA */
+#endif
+};
+
+#define PBLK_RECOVERY_SECTORS 16
+
+struct pblk_lun {
+ struct ppa_addr bppa;
+
+ u8 *bb_list; /* Bad block list for LUN. Only used on
+ * bring up. Bad blocks are managed
+ * within lines on run-time.
+ */
+
+ struct semaphore wr_sem;
+};
+
+struct pblk_gc_rq {
+ struct pblk_line *line;
+ void *data;
+ u64 lba_list[PBLK_MAX_REQ_ADDRS];
+ 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 inflight_gc;
+ 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 low; /* Lower threshold for rate limiter (user I/O
+ * rate limiter - stall)
+ */
+ 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 */
+
+ 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;
+
+ struct timer_list u_timer;
+
+ unsigned long long nr_secs;
+ unsigned long total_blocks;
+ atomic_t free_blocks;
+};
+
+#define PBLK_LINE_EMPTY (~0U)
+
+enum {
+ /* Line Types */
+ PBLK_LINETYPE_FREE = 0,
+ PBLK_LINETYPE_LOG = 1,
+ PBLK_LINETYPE_DATA = 2,
+
+ /* Line state */
+ 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,
+};
+
+#define PBLK_MAGIC 0x70626c6b /*pblk*/
+
+struct line_header {
+ __le32 crc;
+ __le32 identifier; /* pblk identifier */
+ __u8 uuid[16]; /* instance uuid */
+ __le16 type; /* line type */
+ __le16 version; /* type version */
+ __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)
+ * 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 */
+};
+
+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_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 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 smeta_ssec; /* Sector where smeta starts */
+ 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 */
+
+ spinlock_t lock; /* Necessary for invalid_bitmap only */
+};
+
+#define PBLK_DATA_LINES 4
+
+enum {
+ PBLK_KMALLOC_META = 1,
+ PBLK_VMALLOC_META = 2,
+};
+
+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_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 */
+
+ /* Metadata allocation type: VMALLOC | KMALLOC */
+ int emeta_alloc_type;
+
+ /* 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;
+
+ /* 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 length
+ * [1]: struct line_emeta length
+ * [2]: L2P portion length
+ * [3]: vsc list length
+ */
+ 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 */
+};
+
+struct pblk_addr_format {
+ u64 ch_mask;
+ u64 lun_mask;
+ u64 pln_mask;
+ u64 blk_mask;
+ u64 pg_mask;
+ u64 sec_mask;
+ u8 ch_offset;
+ u8 lun_offset;
+ u8 pln_offset;
+ u8 blk_offset;
+ u8 pg_offset;
+ u8 sec_offset;
+};
+
+enum {
+ PBLK_STATE_RUNNING = 0,
+ PBLK_STATE_STOPPING = 1,
+ PBLK_STATE_RECOVERING = 2,
+ PBLK_STATE_STOPPED = 3,
+};
+
+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 */
+
+ int ppaf_bitsize;
+ struct pblk_addr_format ppaf;
+
+ struct pblk_rb rwb;
+
+ int state; /* pblk line state */
+
+ int min_write_pgs; /* Minimum amount of pages required by controller */
+ int max_write_pgs; /* Maximum amount of pages supported by controller */
+ int pgs_in_buffer; /* Number of pages that need to be held in buffer to
+ * guarantee successful reads.
+ */
+
+ sector_t capacity; /* Device capacity when bad blocks are subtracted */
+ int over_pct; /* Percentage of device used for over-provisioning */
+
+ /* pblk provisioning values. Used by rate limiter */
+ struct pblk_rl rl;
+
+ int sec_per_write;
+
+ unsigned char instance_uuid[16];
+#ifdef CONFIG_NVM_DEBUG
+ /* All debug counters apply to 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 nr_flush; /* Number of flush/fua I/O */
+ 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;
+
+ mempool_t *page_bio_pool;
+ mempool_t *line_ws_pool;
+ mempool_t *rec_pool;
+ mempool_t *g_rq_pool;
+ mempool_t *w_rq_pool;
+ mempool_t *line_meta_pool;
+
+ struct workqueue_struct *close_wq;
+ struct workqueue_struct *bb_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))
+
+/*
+ * pblk ring buffer operations
+ */
+int pblk_rb_init(struct pblk_rb *rb, struct pblk_rb_entry *rb_entry_base,
+ unsigned int power_size, unsigned int power_seg_sz);
+unsigned int pblk_rb_calculate_size(unsigned int nr_entries);
+void *pblk_rb_entries_ref(struct pblk_rb *rb);
+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 *gc_line,
+ 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,
+ struct bio *bio, unsigned int pos,
+ unsigned int nr_entries, unsigned int count);
+unsigned int pblk_rb_read_to_bio_list(struct pblk_rb *rb, struct bio *bio,
+ struct list_head *list,
+ unsigned int max);
+int pblk_rb_copy_to_bio(struct pblk_rb *rb, struct bio *bio, sector_t lba,
+ struct ppa_addr ppa, int bio_iter, bool advanced_bio);
+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);
+struct pblk_rb_entry *pblk_rb_sync_scan_entry(struct pblk_rb *rb,
+ struct ppa_addr *ppa);
+void pblk_rb_sync_end(struct pblk_rb *rb, unsigned long *flags);
+unsigned int pblk_rb_sync_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_data_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 rw);
+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_free_rqd(struct pblk *pblk, struct nvm_rq *rqd, int rw);
+void pblk_wait_for_meta(struct pblk *pblk);
+struct ppa_addr pblk_get_lba_map(struct pblk *pblk, sector_t lba);
+void pblk_discard(struct pblk *pblk, struct bio *bio);
+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);
+int pblk_submit_meta_io(struct pblk *pblk, struct pblk_line *meta_line);
+struct bio *pblk_bio_map_addr(struct pblk *pblk, void *data,
+ unsigned int nr_secs, unsigned int len,
+ int alloc_type, gfp_t gfp_mask);
+struct pblk_line *pblk_line_get(struct pblk *pblk);
+struct pblk_line *pblk_line_get_first_data(struct pblk *pblk);
+void pblk_line_replace_data(struct pblk *pblk);
+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 *pblk, 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_meta_sync(struct pblk *pblk);
+void pblk_line_close_ws(struct work_struct *work);
+void pblk_pipeline_stop(struct pblk *pblk);
+void pblk_line_mark_bb(struct work_struct *work);
+void pblk_line_run_ws(struct pblk *pblk, struct pblk_line *line, void *priv,
+ void (*work)(struct work_struct *),
+ struct workqueue_struct *wq);
+u64 pblk_line_smeta_start(struct pblk *pblk, struct pblk_line *line);
+int pblk_line_read_smeta(struct pblk *pblk, struct pblk_line *line);
+int pblk_line_read_emeta(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);
+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);
+void pblk_up_page(struct pblk *pblk, struct ppa_addr *ppa_list, int nr_ppas);
+void pblk_down_rq(struct pblk *pblk, struct ppa_addr *ppa_list, int nr_ppas,
+ unsigned long *lun_bitmap);
+void pblk_down_page(struct pblk *pblk, struct ppa_addr *ppa_list, int nr_ppas);
+void pblk_up_rq(struct pblk *pblk, struct ppa_addr *ppa_list, int nr_ppas,
+ unsigned long *lun_bitmap);
+void pblk_end_bio_sync(struct bio *bio);
+void pblk_end_io_sync(struct nvm_rq *rqd);
+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);
+void pblk_lookup_l2p_rand(struct pblk *pblk, struct ppa_addr *ppas,
+ u64 *lba_list, int nr_secs);
+void pblk_lookup_l2p_seq(struct pblk *pblk, struct ppa_addr *ppas,
+ sector_t blba, int nr_secs);
+
+/*
+ * pblk user I/O write path
+ */
+int pblk_write_to_cache(struct pblk *pblk, struct bio *bio,
+ unsigned long flags);
+int pblk_write_gc_to_cache(struct pblk *pblk, void *data, u64 *lba_list,
+ unsigned int nr_entries, unsigned int nr_rec_entries,
+ struct pblk_line *gc_line, unsigned long flags);
+
+/*
+ * pblk map
+ */
+void 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);
+void 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(unsigned long data);
+void pblk_write_should_kick(struct pblk *pblk);
+
+/*
+ * pblk read path
+ */
+extern struct bio_set *pblk_bio_set;
+int pblk_submit_read(struct pblk *pblk, struct bio *bio);
+int pblk_submit_read_gc(struct pblk *pblk, u64 *lba_list, void *data,
+ unsigned int nr_secs, unsigned int *secs_to_gc,
+ struct pblk_line *line);
+/*
+ * pblk recovery
+ */
+void pblk_submit_rec(struct work_struct *work);
+struct pblk_line *pblk_recov_l2p(struct pblk *pblk);
+int pblk_recov_pad(struct pblk *pblk);
+__le64 *pblk_recov_get_lba_list(struct pblk *pblk, struct line_emeta *emeta);
+int pblk_recov_setup_rq(struct pblk *pblk, struct pblk_c_ctx *c_ctx,
+ struct pblk_rec_ctx *recovery, u64 *comp_bits,
+ unsigned int comp);
+
+/*
+ * pblk gc
+ */
+#define PBLK_GC_MAX_READERS 8 /* Max number of outstanding GC reader jobs */
+#define PBLK_GC_W_QD 128 /* Queue depth for inflight GC write I/Os */
+#define PBLK_GC_L_QD 4 /* Queue depth for inflight GC lines */
+#define PBLK_GC_RSV_LINE 1 /* Reserved lines for GC */
+
+int pblk_gc_init(struct pblk *pblk);
+void pblk_gc_exit(struct pblk *pblk);
+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_kick(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);
+
+/*
+ * pblk rate limiter
+ */
+void pblk_rl_init(struct pblk_rl *rl, int budget);
+void pblk_rl_free(struct pblk_rl *rl);
+int pblk_rl_high_thrs(struct pblk_rl *rl);
+int pblk_rl_low_thrs(struct pblk_rl *rl);
+unsigned long pblk_rl_nr_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_sysfs_rate_show(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);
+void pblk_rl_set_space_limit(struct pblk_rl *rl, int entries_left);
+int pblk_rl_is_limit(struct pblk_rl *rl);
+
+/*
+ * pblk sysfs
+ */
+int pblk_sysfs_init(struct gendisk *tdisk);
+void pblk_sysfs_exit(struct gendisk *tdisk);
+
+static inline void *pblk_malloc(size_t size, int type, gfp_t flags)
+{
+ if (type == PBLK_KMALLOC_META)
+ return kmalloc(size, flags);
+ return vmalloc(size);
+}
+
+static inline void pblk_mfree(void *ptr, int type)
+{
+ if (type == PBLK_KMALLOC_META)
+ kfree(ptr);
+ else
+ vfree(ptr);
+}
+
+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_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)
+{
+ int vsc;
+
+ spin_lock(&line->lock);
+ vsc = le32_to_cpu(*line->vsc);
+ spin_unlock(&line->lock);
+
+ return vsc;
+}
+
+#define NVM_MEM_PAGE_WRITE (8)
+
+static inline int pblk_pad_distance(struct pblk *pblk)
+{
+ struct nvm_tgt_dev *dev = pblk->dev;
+ struct nvm_geo *geo = &dev->geo;
+
+ return NVM_MEM_PAGE_WRITE * geo->nr_luns * geo->sec_per_pl;
+}
+
+static inline int pblk_dev_ppa_to_line(struct ppa_addr p)
+{
+ return p.g.blk;
+}
+
+static inline int pblk_tgt_ppa_to_line(struct ppa_addr p)
+{
+ return p.g.blk;
+}
+
+static inline int pblk_ppa_to_pos(struct nvm_geo *geo, struct ppa_addr p)
+{
+ return p.g.lun * geo->nr_chnls + p.g.ch;
+}
+
+/* A block within a line corresponds to the lun */
+static inline int pblk_dev_ppa_to_pos(struct nvm_geo *geo, struct ppa_addr p)
+{
+ return p.g.lun * geo->nr_chnls + p.g.ch;
+}
+
+static inline struct ppa_addr pblk_ppa32_to_ppa64(struct pblk *pblk, u32 ppa32)
+{
+ struct ppa_addr ppa64;
+
+ ppa64.ppa = 0;
+
+ if (ppa32 == -1) {
+ ppa64.ppa = ADDR_EMPTY;
+ } else if (ppa32 & (1U << 31)) {
+ ppa64.c.line = ppa32 & ((~0U) >> 1);
+ ppa64.c.is_cached = 1;
+ } else {
+ ppa64.g.blk = (ppa32 & pblk->ppaf.blk_mask) >>
+ pblk->ppaf.blk_offset;
+ ppa64.g.pg = (ppa32 & pblk->ppaf.pg_mask) >>
+ pblk->ppaf.pg_offset;
+ ppa64.g.lun = (ppa32 & pblk->ppaf.lun_mask) >>
+ pblk->ppaf.lun_offset;
+ ppa64.g.ch = (ppa32 & pblk->ppaf.ch_mask) >>
+ pblk->ppaf.ch_offset;
+ ppa64.g.pl = (ppa32 & pblk->ppaf.pln_mask) >>
+ pblk->ppaf.pln_offset;
+ ppa64.g.sec = (ppa32 & pblk->ppaf.sec_mask) >>
+ pblk->ppaf.sec_offset;
+ }
+
+ return ppa64;
+}
+
+static inline struct ppa_addr pblk_trans_map_get(struct pblk *pblk,
+ sector_t lba)
+{
+ struct ppa_addr ppa;
+
+ if (pblk->ppaf_bitsize < 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 u32 pblk_ppa64_to_ppa32(struct pblk *pblk, struct ppa_addr ppa64)
+{
+ u32 ppa32 = 0;
+
+ if (ppa64.ppa == ADDR_EMPTY) {
+ ppa32 = ~0U;
+ } else if (ppa64.c.is_cached) {
+ ppa32 |= ppa64.c.line;
+ ppa32 |= 1U << 31;
+ } else {
+ ppa32 |= ppa64.g.blk << pblk->ppaf.blk_offset;
+ ppa32 |= ppa64.g.pg << pblk->ppaf.pg_offset;
+ ppa32 |= ppa64.g.lun << pblk->ppaf.lun_offset;
+ ppa32 |= ppa64.g.ch << pblk->ppaf.ch_offset;
+ ppa32 |= ppa64.g.pl << pblk->ppaf.pln_offset;
+ ppa32 |= ppa64.g.sec << pblk->ppaf.sec_offset;
+ }
+
+ return ppa32;
+}
+
+static inline void pblk_trans_map_set(struct pblk *pblk, sector_t lba,
+ struct ppa_addr ppa)
+{
+ if (pblk->ppaf_bitsize < 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 u64 pblk_dev_ppa_to_line_addr(struct pblk *pblk,
+ struct ppa_addr p)
+{
+ u64 paddr;
+
+ paddr = 0;
+ paddr |= (u64)p.g.pg << pblk->ppaf.pg_offset;
+ paddr |= (u64)p.g.lun << pblk->ppaf.lun_offset;
+ paddr |= (u64)p.g.ch << pblk->ppaf.ch_offset;
+ paddr |= (u64)p.g.pl << pblk->ppaf.pln_offset;
+ paddr |= (u64)p.g.sec << pblk->ppaf.sec_offset;
+
+ return paddr;
+}
+
+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)
+{
+ if (lppa.ppa == rppa.ppa)
+ return true;
+
+ return false;
+}
+
+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 struct ppa_addr addr_to_gen_ppa(struct pblk *pblk, u64 paddr,
+ u64 line_id)
+{
+ struct ppa_addr ppa;
+
+ ppa.ppa = 0;
+ ppa.g.blk = line_id;
+ ppa.g.pg = (paddr & pblk->ppaf.pg_mask) >> pblk->ppaf.pg_offset;
+ ppa.g.lun = (paddr & pblk->ppaf.lun_mask) >> pblk->ppaf.lun_offset;
+ ppa.g.ch = (paddr & pblk->ppaf.ch_mask) >> pblk->ppaf.ch_offset;
+ ppa.g.pl = (paddr & pblk->ppaf.pln_mask) >> pblk->ppaf.pln_offset;
+ ppa.g.sec = (paddr & pblk->ppaf.sec_mask) >> pblk->ppaf.sec_offset;
+
+ return ppa;
+}
+
+static inline struct ppa_addr addr_to_pblk_ppa(struct pblk *pblk, u64 paddr,
+ u64 line_id)
+{
+ struct ppa_addr ppa;
+
+ ppa = addr_to_gen_ppa(pblk, paddr, line_id);
+
+ return ppa;
+}
+
+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_set_progr_mode(struct pblk *pblk, int type)
+{
+ struct nvm_tgt_dev *dev = pblk->dev;
+ struct nvm_geo *geo = &dev->geo;
+ int flags;
+
+ flags = geo->plane_mode >> 1;
+
+ if (type == WRITE)
+ flags |= NVM_IO_SCRAMBLE_ENABLE;
+
+ return flags;
+}
+
+enum {
+ PBLK_READ_RANDOM = 0,
+ PBLK_READ_SEQUENTIAL = 1,
+};
+
+static inline int pblk_set_read_mode(struct pblk *pblk, int type)
+{
+ struct nvm_tgt_dev *dev = pblk->dev;
+ struct nvm_geo *geo = &dev->geo;
+ int flags;
+
+ flags = NVM_IO_SUSPEND | NVM_IO_SCRAMBLE_ENABLE;
+ if (type == PBLK_READ_SEQUENTIAL)
+ flags |= geo->plane_mode >> 1;
+
+ return flags;
+}
+
+static inline int pblk_io_aligned(struct pblk *pblk, int nr_secs)
+{
+ return !(nr_secs % pblk->min_write_pgs);
+}
+
+#ifdef CONFIG_NVM_DEBUG
+static inline void print_ppa(struct ppa_addr *p, char *msg, int error)
+{
+ if (p->c.is_cached) {
+ pr_err("ppa: (%s: %x) cache line: %llu\n",
+ msg, error, (u64)p->c.line);
+ } else {
+ pr_err("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);
+ }
+}
+
+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(&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(&rqd->ppa_list[bit], "rqd", error);
+ }
+
+ pr_err("error:%d, ppa_status:%llx\n", error, rqd->ppa_status);
+}
+#endif
+
+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 (!ppa->c.is_cached &&
+ ppa->g.ch < geo->nr_chnls &&
+ ppa->g.lun < geo->luns_per_chnl &&
+ ppa->g.pl < geo->nr_planes &&
+ ppa->g.blk < geo->blks_per_lun &&
+ ppa->g.pg < geo->pgs_per_blk &&
+ ppa->g.sec < geo->sec_per_pg)
+ continue;
+
+#ifdef CONFIG_NVM_DEBUG
+ print_ppa(ppa, "boundary", i);
+#endif
+ return 1;
+ }
+ return 0;
+}
+
+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 sector_t pblk_get_sector(sector_t lba)
+{
+ return lba * NR_PHY_IN_LOG;
+}
+
+static inline void pblk_setup_uuid(struct pblk *pblk)
+{
+ uuid_le uuid;
+
+ uuid_le_gen(&uuid);
+ memcpy(pblk->instance_uuid, uuid.b, 16);
+}
+#endif /* PBLK_H_ */