| /* |
| * 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_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 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) |
| #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; |
| 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 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 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_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; |
| |
| 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 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; |
| |
| 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_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*/ |
| #define SMETA_VERSION cpu_to_le16(1) |
| |
| 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 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]; |
| #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 *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)) |
| |
| /* |
| * 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); |
| 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_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); |
| 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 *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_ws(struct work_struct *work); |
| void pblk_pipeline_stop(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); |
| 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, 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); |
| |
| /* |
| * 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 |
| */ |
| void pblk_submit_rec(struct work_struct *work); |
| 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); |
| 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_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); |
| 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); |
| |
| /* |
| * 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) |
| { |
| return le32_to_cpu(*line->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->all_luns * geo->sec_per_pl; |
| } |
| |
| static inline int pblk_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; |
| } |
| |
| 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 u64 pblk_dev_ppa_to_line_addr(struct pblk *pblk, |
| struct ppa_addr p) |
| { |
| u64 paddr; |
| |
| 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 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 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 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 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 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 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 == 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; |
| |
| 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); |
| } |
| |
| 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->nr_luns && |
| ppa->g.pl < geo->nr_planes && |
| ppa->g.blk < geo->nr_chks && |
| ppa->g.pg < geo->ws_per_chk && |
| ppa->g.sec < geo->sec_per_pg) |
| continue; |
| |
| print_ppa(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) { |
| pr_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_ */ |