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Diffstat (limited to 'drivers/lightnvm/pblk.h')
| -rw-r--r-- | drivers/lightnvm/pblk.h | 1444 |
1 files changed, 1444 insertions, 0 deletions
diff --git a/drivers/lightnvm/pblk.h b/drivers/lightnvm/pblk.h new file mode 100644 index 000000000..4760af7b6 --- /dev/null +++ b/drivers/lightnvm/pblk.h @@ -0,0 +1,1444 @@ +/* + * 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_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) + +/* 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, +}; + +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_meta_size (sizeof(struct pblk_sec_meta) * PBLK_MAX_REQ_ADDRS) +#define pblk_dma_ppa_size (sizeof(u64) * 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; +}; + +/* read context */ +struct pblk_g_ctx { + void *private; + unsigned long start_time; + u64 lba; +}; + +/* partial read context */ +struct pblk_pr_ctx { + struct bio *orig_bio; + DECLARE_BITMAP(bitmap, NVM_MAX_VLBA); + unsigned int orig_nr_secs; + unsigned int bio_init_idx; + void *ppa_ptr; + dma_addr_t dma_ppa_list; +}; + +/* 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 + */ + + 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[PBLK_MAX_REQ_ADDRS]; + 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 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 long nr_secs; + 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; + __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 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 */ + + 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_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_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 */ + + /* 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 + * [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 max_write_pgs; /* Maximum amount of pages supported by controller */ + + 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; + + unsigned char instance_uuid[16]; + + /* 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, 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 *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, 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_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_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 type); +void pblk_free_rqd(struct pblk *pblk, struct nvm_rq *rqd, int type); +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_chunk_get_info(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); +int pblk_submit_io_sync(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); +struct pblk_line *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_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_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); +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); +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); +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); +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, struct pblk_gc_rq *gc_rq); + +/* + * 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(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; +int 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 */ +#define PBLK_GC_RSV_LINE 1 /* Reserved lines for GC */ + +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); + +/* + * pblk rate limiter + */ +void pblk_rl_init(struct pblk_rl *rl, int budget); +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 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_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_pad_distance(struct pblk *pblk) +{ + struct nvm_tgt_dev *dev = pblk->dev; + struct nvm_geo *geo = &dev->geo; + + return geo->mw_cunits * geo->all_luns * geo->ws_opt; +} + +static inline int pblk_ppa_to_line(struct ppa_addr p) +{ + return p.a.blk; +} + +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 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 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 { + struct nvm_tgt_dev *dev = pblk->dev; + struct nvm_geo *geo = &dev->geo; + + if (geo->version == NVM_OCSSD_SPEC_12) { + struct nvm_addrf_12 *ppaf = + (struct nvm_addrf_12 *)&pblk->addrf; + + ppa64.g.ch = (ppa32 & ppaf->ch_mask) >> + ppaf->ch_offset; + ppa64.g.lun = (ppa32 & ppaf->lun_mask) >> + ppaf->lun_offset; + ppa64.g.blk = (ppa32 & ppaf->blk_mask) >> + ppaf->blk_offset; + ppa64.g.pg = (ppa32 & ppaf->pg_mask) >> + ppaf->pg_offset; + ppa64.g.pl = (ppa32 & ppaf->pln_mask) >> + ppaf->pln_offset; + ppa64.g.sec = (ppa32 & ppaf->sec_mask) >> + ppaf->sec_offset; + } else { + struct nvm_addrf *lbaf = &pblk->addrf; + + ppa64.m.grp = (ppa32 & lbaf->ch_mask) >> + lbaf->ch_offset; + ppa64.m.pu = (ppa32 & lbaf->lun_mask) >> + lbaf->lun_offset; + ppa64.m.chk = (ppa32 & lbaf->chk_mask) >> + lbaf->chk_offset; + ppa64.m.sec = (ppa32 & lbaf->sec_mask) >> + lbaf->sec_offset; + } + } + + return ppa64; +} + +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 { + struct nvm_tgt_dev *dev = pblk->dev; + struct nvm_geo *geo = &dev->geo; + + if (geo->version == NVM_OCSSD_SPEC_12) { + struct nvm_addrf_12 *ppaf = + (struct nvm_addrf_12 *)&pblk->addrf; + + ppa32 |= ppa64.g.ch << ppaf->ch_offset; + ppa32 |= ppa64.g.lun << ppaf->lun_offset; + ppa32 |= ppa64.g.blk << ppaf->blk_offset; + ppa32 |= ppa64.g.pg << ppaf->pg_offset; + ppa32 |= ppa64.g.pl << ppaf->pln_offset; + ppa32 |= ppa64.g.sec << ppaf->sec_offset; + } else { + struct nvm_addrf *lbaf = &pblk->addrf; + + ppa32 |= ppa64.m.grp << lbaf->ch_offset; + ppa32 |= ppa64.m.pu << lbaf->lun_offset; + ppa32 |= ppa64.m.chk << lbaf->chk_offset; + ppa32 |= ppa64.m.sec << lbaf->sec_offset; + } + } + + return ppa32; +} + +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_set_progr_mode(struct pblk *pblk, int type) +{ + struct nvm_tgt_dev *dev = pblk->dev; + struct nvm_geo *geo = &dev->geo; + int flags; + + if (geo->version == NVM_OCSSD_SPEC_20) + return 0; + + flags = geo->pln_mode >> 1; + + if (type == PBLK_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; + + if (geo->version == NVM_OCSSD_SPEC_20) + return 0; + + flags = NVM_IO_SUSPEND | NVM_IO_SCRAMBLE_ENABLE; + if (type == PBLK_READ_SEQUENTIAL) + flags |= geo->pln_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_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; + + ppa_list = (rqd->nr_ppas > 1) ? rqd->ppa_list : &rqd->ppa_addr; + + 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; + struct ppa_addr ppa; + int i; + + for (i = 0; i < rqd->nr_ppas; i++) { + ppa = ppa_list[i]; + line = &pblk->lines[pblk_ppa_to_line(ppa)]; + + 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 void pblk_setup_uuid(struct pblk *pblk) +{ + uuid_le uuid; + + uuid_le_gen(&uuid); + memcpy(pblk->instance_uuid, uuid.b, 16); +} +#endif /* PBLK_H_ */ |