diff options
Diffstat (limited to 'drivers/lightnvm/pblk.h')
| -rw-r--r-- | drivers/lightnvm/pblk.h | 42 |
1 files changed, 35 insertions, 7 deletions
diff --git a/drivers/lightnvm/pblk.h b/drivers/lightnvm/pblk.h index fae2526f80b2..4b7d8618631f 100644 --- a/drivers/lightnvm/pblk.h +++ b/drivers/lightnvm/pblk.h @@ -331,7 +331,7 @@ enum { #define SMETA_VERSION_MINOR (1) #define EMETA_VERSION_MAJOR (0) -#define EMETA_VERSION_MINOR (1) +#define EMETA_VERSION_MINOR (2) struct line_header { __le32 crc; @@ -361,11 +361,13 @@ struct line_smeta { __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): @@ -389,7 +391,15 @@ struct line_emeta { __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 */ + __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 { @@ -519,10 +529,11 @@ struct pblk_line_meta { 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 + * [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 @@ -604,8 +615,19 @@ struct pblk { 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; + #ifdef CONFIG_NVM_DEBUG - /* All debug counters apply to 4kb sector I/Os */ + /* 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 */ @@ -900,6 +922,12 @@ 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]); |