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Diffstat (limited to 'include/linux/lightnvm.h')
-rw-r--r--include/linux/lightnvm.h244
1 files changed, 127 insertions, 117 deletions
diff --git a/include/linux/lightnvm.h b/include/linux/lightnvm.h
index d190786e4ad8..7c273bbc5351 100644
--- a/include/linux/lightnvm.h
+++ b/include/linux/lightnvm.h
@@ -47,6 +47,7 @@ struct ppa_addr {
struct nvm_rq;
struct nvm_id;
struct nvm_dev;
+struct nvm_tgt_dev;
typedef int (nvm_l2p_update_fn)(u64, u32, __le64 *, void *);
typedef int (nvm_id_fn)(struct nvm_dev *, struct nvm_id *);
@@ -107,6 +108,8 @@ enum {
NVM_RSP_NOT_CHANGEABLE = 0x1,
NVM_RSP_ERR_FAILWRITE = 0x40ff,
NVM_RSP_ERR_EMPTYPAGE = 0x42ff,
+ NVM_RSP_ERR_FAILECC = 0x4281,
+ NVM_RSP_WARN_HIGHECC = 0x4700,
/* Device opcodes */
NVM_OP_HBREAD = 0x02,
@@ -208,7 +211,7 @@ struct nvm_id {
struct nvm_target {
struct list_head list;
- struct nvm_dev *dev;
+ struct nvm_tgt_dev *dev;
struct nvm_tgt_type *type;
struct gendisk *disk;
};
@@ -228,7 +231,7 @@ typedef void (nvm_end_io_fn)(struct nvm_rq *);
struct nvm_rq {
struct nvm_tgt_instance *ins;
- struct nvm_dev *dev;
+ struct nvm_tgt_dev *dev;
struct bio *bio;
@@ -263,35 +266,12 @@ static inline void *nvm_rq_to_pdu(struct nvm_rq *rqdata)
return rqdata + 1;
}
-struct nvm_block;
-
-struct nvm_lun {
- int id;
-
- int lun_id;
- int chnl_id;
-
- spinlock_t lock;
-
- unsigned int nr_free_blocks; /* Number of unused blocks */
- struct nvm_block *blocks;
-};
-
enum {
NVM_BLK_ST_FREE = 0x1, /* Free block */
NVM_BLK_ST_TGT = 0x2, /* Block in use by target */
NVM_BLK_ST_BAD = 0x8, /* Bad block */
};
-struct nvm_block {
- struct list_head list;
- struct nvm_lun *lun;
- unsigned long id;
-
- void *priv;
- int state;
-};
-
/* system block cpu representation */
struct nvm_sb_info {
unsigned long seqnr;
@@ -301,22 +281,12 @@ struct nvm_sb_info {
struct ppa_addr fs_ppa;
};
-struct nvm_dev {
- struct nvm_dev_ops *ops;
-
- struct list_head devices;
-
- /* Media manager */
- struct nvmm_type *mt;
- void *mp;
-
- /* System blocks */
- struct nvm_sb_info sb;
-
- /* Device information */
+/* Device generic information */
+struct nvm_geo {
int nr_chnls;
+ int nr_luns;
+ int luns_per_chnl; /* -1 if channels are not symmetric */
int nr_planes;
- int luns_per_chnl;
int sec_per_pg; /* only sectors for a single page */
int pgs_per_blk;
int blks_per_lun;
@@ -336,14 +306,44 @@ struct nvm_dev {
int sec_per_pl; /* all sectors across planes */
int sec_per_blk;
int sec_per_lun;
+};
+
+struct nvm_tgt_dev {
+ /* Device information */
+ struct nvm_geo geo;
+
+ /* Base ppas for target LUNs */
+ struct ppa_addr *luns;
+
+ sector_t total_secs;
+
+ struct nvm_id identity;
+ struct request_queue *q;
+
+ struct nvm_dev *parent;
+ void *map;
+};
+
+struct nvm_dev {
+ struct nvm_dev_ops *ops;
+
+ struct list_head devices;
+
+ /* Media manager */
+ struct nvmm_type *mt;
+ void *mp;
+
+ /* System blocks */
+ struct nvm_sb_info sb;
+
+ /* Device information */
+ struct nvm_geo geo;
/* lower page table */
int lps_per_blk;
int *lptbl;
- unsigned long total_blocks;
unsigned long total_secs;
- int nr_luns;
unsigned long *lun_map;
void *dma_pool;
@@ -352,26 +352,57 @@ struct nvm_dev {
/* Backend device */
struct request_queue *q;
- struct device dev;
- struct device *parent_dev;
char name[DISK_NAME_LEN];
void *private_data;
+ void *rmap;
+
struct mutex mlock;
spinlock_t lock;
};
+static inline struct ppa_addr linear_to_generic_addr(struct nvm_geo *geo,
+ u64 pba)
+{
+ struct ppa_addr l;
+ int secs, pgs, blks, luns;
+ sector_t ppa = pba;
+
+ l.ppa = 0;
+
+ div_u64_rem(ppa, geo->sec_per_pg, &secs);
+ l.g.sec = secs;
+
+ sector_div(ppa, geo->sec_per_pg);
+ div_u64_rem(ppa, geo->pgs_per_blk, &pgs);
+ l.g.pg = pgs;
+
+ sector_div(ppa, geo->pgs_per_blk);
+ div_u64_rem(ppa, geo->blks_per_lun, &blks);
+ l.g.blk = blks;
+
+ sector_div(ppa, geo->blks_per_lun);
+ div_u64_rem(ppa, geo->luns_per_chnl, &luns);
+ l.g.lun = luns;
+
+ sector_div(ppa, geo->luns_per_chnl);
+ l.g.ch = ppa;
+
+ return l;
+}
+
static inline struct ppa_addr generic_to_dev_addr(struct nvm_dev *dev,
struct ppa_addr r)
{
+ struct nvm_geo *geo = &dev->geo;
struct ppa_addr l;
- l.ppa = ((u64)r.g.blk) << dev->ppaf.blk_offset;
- l.ppa |= ((u64)r.g.pg) << dev->ppaf.pg_offset;
- l.ppa |= ((u64)r.g.sec) << dev->ppaf.sect_offset;
- l.ppa |= ((u64)r.g.pl) << dev->ppaf.pln_offset;
- l.ppa |= ((u64)r.g.lun) << dev->ppaf.lun_offset;
- l.ppa |= ((u64)r.g.ch) << dev->ppaf.ch_offset;
+ l.ppa = ((u64)r.g.blk) << geo->ppaf.blk_offset;
+ l.ppa |= ((u64)r.g.pg) << geo->ppaf.pg_offset;
+ l.ppa |= ((u64)r.g.sec) << geo->ppaf.sect_offset;
+ l.ppa |= ((u64)r.g.pl) << geo->ppaf.pln_offset;
+ l.ppa |= ((u64)r.g.lun) << geo->ppaf.lun_offset;
+ l.ppa |= ((u64)r.g.ch) << geo->ppaf.ch_offset;
return l;
}
@@ -379,24 +410,25 @@ static inline struct ppa_addr generic_to_dev_addr(struct nvm_dev *dev,
static inline struct ppa_addr dev_to_generic_addr(struct nvm_dev *dev,
struct ppa_addr r)
{
+ struct nvm_geo *geo = &dev->geo;
struct ppa_addr l;
l.ppa = 0;
/*
* (r.ppa << X offset) & X len bitmask. X eq. blk, pg, etc.
*/
- l.g.blk = (r.ppa >> dev->ppaf.blk_offset) &
- (((1 << dev->ppaf.blk_len) - 1));
- l.g.pg |= (r.ppa >> dev->ppaf.pg_offset) &
- (((1 << dev->ppaf.pg_len) - 1));
- l.g.sec |= (r.ppa >> dev->ppaf.sect_offset) &
- (((1 << dev->ppaf.sect_len) - 1));
- l.g.pl |= (r.ppa >> dev->ppaf.pln_offset) &
- (((1 << dev->ppaf.pln_len) - 1));
- l.g.lun |= (r.ppa >> dev->ppaf.lun_offset) &
- (((1 << dev->ppaf.lun_len) - 1));
- l.g.ch |= (r.ppa >> dev->ppaf.ch_offset) &
- (((1 << dev->ppaf.ch_len) - 1));
+ l.g.blk = (r.ppa >> geo->ppaf.blk_offset) &
+ (((1 << geo->ppaf.blk_len) - 1));
+ l.g.pg |= (r.ppa >> geo->ppaf.pg_offset) &
+ (((1 << geo->ppaf.pg_len) - 1));
+ l.g.sec |= (r.ppa >> geo->ppaf.sect_offset) &
+ (((1 << geo->ppaf.sect_len) - 1));
+ l.g.pl |= (r.ppa >> geo->ppaf.pln_offset) &
+ (((1 << geo->ppaf.pln_len) - 1));
+ l.g.lun |= (r.ppa >> geo->ppaf.lun_offset) &
+ (((1 << geo->ppaf.lun_len) - 1));
+ l.g.ch |= (r.ppa >> geo->ppaf.ch_offset) &
+ (((1 << geo->ppaf.ch_len) - 1));
return l;
}
@@ -411,18 +443,13 @@ static inline void ppa_set_empty(struct ppa_addr *ppa_addr)
ppa_addr->ppa = ADDR_EMPTY;
}
-static inline struct ppa_addr block_to_ppa(struct nvm_dev *dev,
- struct nvm_block *blk)
+static inline int ppa_cmp_blk(struct ppa_addr ppa1, struct ppa_addr ppa2)
{
- struct ppa_addr ppa;
- struct nvm_lun *lun = blk->lun;
-
- ppa.ppa = 0;
- ppa.g.blk = blk->id % dev->blks_per_lun;
- ppa.g.lun = lun->lun_id;
- ppa.g.ch = lun->chnl_id;
+ if (ppa_empty(ppa1) || ppa_empty(ppa2))
+ return 0;
- return ppa;
+ return ((ppa1.g.ch == ppa2.g.ch) && (ppa1.g.lun == ppa2.g.lun) &&
+ (ppa1.g.blk == ppa2.g.blk));
}
static inline int ppa_to_slc(struct nvm_dev *dev, int slc_pg)
@@ -432,7 +459,7 @@ static inline int ppa_to_slc(struct nvm_dev *dev, int slc_pg)
typedef blk_qc_t (nvm_tgt_make_rq_fn)(struct request_queue *, struct bio *);
typedef sector_t (nvm_tgt_capacity_fn)(void *);
-typedef void *(nvm_tgt_init_fn)(struct nvm_dev *, struct gendisk *, int, int);
+typedef void *(nvm_tgt_init_fn)(struct nvm_tgt_dev *, struct gendisk *);
typedef void (nvm_tgt_exit_fn)(void *);
struct nvm_tgt_type {
@@ -465,23 +492,18 @@ typedef void (nvmm_unregister_fn)(struct nvm_dev *);
typedef int (nvmm_create_tgt_fn)(struct nvm_dev *, struct nvm_ioctl_create *);
typedef int (nvmm_remove_tgt_fn)(struct nvm_dev *, struct nvm_ioctl_remove *);
-typedef struct nvm_block *(nvmm_get_blk_fn)(struct nvm_dev *,
- struct nvm_lun *, unsigned long);
-typedef void (nvmm_put_blk_fn)(struct nvm_dev *, struct nvm_block *);
-typedef int (nvmm_open_blk_fn)(struct nvm_dev *, struct nvm_block *);
-typedef int (nvmm_close_blk_fn)(struct nvm_dev *, struct nvm_block *);
-typedef void (nvmm_flush_blk_fn)(struct nvm_dev *, struct nvm_block *);
-typedef int (nvmm_submit_io_fn)(struct nvm_dev *, struct nvm_rq *);
-typedef int (nvmm_erase_blk_fn)(struct nvm_dev *, struct nvm_block *,
- unsigned long);
-typedef void (nvmm_mark_blk_fn)(struct nvm_dev *, struct ppa_addr, int);
-typedef struct nvm_lun *(nvmm_get_lun_fn)(struct nvm_dev *, int);
-typedef int (nvmm_reserve_lun)(struct nvm_dev *, int);
-typedef void (nvmm_release_lun)(struct nvm_dev *, int);
-typedef void (nvmm_lun_info_print_fn)(struct nvm_dev *);
-
+typedef int (nvmm_submit_io_fn)(struct nvm_tgt_dev *, struct nvm_rq *);
+typedef int (nvmm_erase_blk_fn)(struct nvm_tgt_dev *, struct ppa_addr *, int);
typedef int (nvmm_get_area_fn)(struct nvm_dev *, sector_t *, sector_t);
typedef void (nvmm_put_area_fn)(struct nvm_dev *, sector_t);
+typedef struct ppa_addr (nvmm_trans_ppa_fn)(struct nvm_tgt_dev *,
+ struct ppa_addr, int);
+typedef void (nvmm_part_to_tgt_fn)(struct nvm_dev *, sector_t*, int);
+
+enum {
+ TRANS_TGT_TO_DEV = 0x0,
+ TRANS_DEV_TO_TGT = 0x1,
+};
struct nvmm_type {
const char *name;
@@ -493,54 +515,41 @@ struct nvmm_type {
nvmm_create_tgt_fn *create_tgt;
nvmm_remove_tgt_fn *remove_tgt;
- /* Block administration callbacks */
- nvmm_get_blk_fn *get_blk;
- nvmm_put_blk_fn *put_blk;
- nvmm_open_blk_fn *open_blk;
- nvmm_close_blk_fn *close_blk;
- nvmm_flush_blk_fn *flush_blk;
-
nvmm_submit_io_fn *submit_io;
nvmm_erase_blk_fn *erase_blk;
- /* Bad block mgmt */
- nvmm_mark_blk_fn *mark_blk;
-
- /* Configuration management */
- nvmm_get_lun_fn *get_lun;
- nvmm_reserve_lun *reserve_lun;
- nvmm_release_lun *release_lun;
-
- /* Statistics */
- nvmm_lun_info_print_fn *lun_info_print;
-
nvmm_get_area_fn *get_area;
nvmm_put_area_fn *put_area;
+ nvmm_trans_ppa_fn *trans_ppa;
+ nvmm_part_to_tgt_fn *part_to_tgt;
+
struct list_head list;
};
extern int nvm_register_mgr(struct nvmm_type *);
extern void nvm_unregister_mgr(struct nvmm_type *);
-extern struct nvm_block *nvm_get_blk(struct nvm_dev *, struct nvm_lun *,
- unsigned long);
-extern void nvm_put_blk(struct nvm_dev *, struct nvm_block *);
-
extern struct nvm_dev *nvm_alloc_dev(int);
extern int nvm_register(struct nvm_dev *);
extern void nvm_unregister(struct nvm_dev *);
-void nvm_mark_blk(struct nvm_dev *dev, struct ppa_addr ppa, int type);
-
-extern int nvm_submit_io(struct nvm_dev *, struct nvm_rq *);
+extern int nvm_set_bb_tbl(struct nvm_dev *, struct ppa_addr *, int, int);
+extern int nvm_set_tgt_bb_tbl(struct nvm_tgt_dev *, struct ppa_addr *,
+ int, int);
+extern int nvm_max_phys_sects(struct nvm_tgt_dev *);
+extern int nvm_submit_io(struct nvm_tgt_dev *, struct nvm_rq *);
extern void nvm_generic_to_addr_mode(struct nvm_dev *, struct nvm_rq *);
extern void nvm_addr_to_generic_mode(struct nvm_dev *, struct nvm_rq *);
extern int nvm_set_rqd_ppalist(struct nvm_dev *, struct nvm_rq *,
const struct ppa_addr *, int, int);
extern void nvm_free_rqd_ppalist(struct nvm_dev *, struct nvm_rq *);
-extern int nvm_erase_ppa(struct nvm_dev *, struct ppa_addr *, int);
-extern int nvm_erase_blk(struct nvm_dev *, struct nvm_block *);
+extern int nvm_erase_ppa(struct nvm_dev *, struct ppa_addr *, int, int);
+extern int nvm_erase_blk(struct nvm_tgt_dev *, struct ppa_addr *, int);
+extern int nvm_get_l2p_tbl(struct nvm_tgt_dev *, u64, u32, nvm_l2p_update_fn *,
+ void *);
+extern int nvm_get_area(struct nvm_tgt_dev *, sector_t *, sector_t);
+extern void nvm_put_area(struct nvm_tgt_dev *, sector_t);
extern void nvm_end_io(struct nvm_rq *, int);
extern int nvm_submit_ppa(struct nvm_dev *, struct ppa_addr *, int, int, int,
void *, int);
@@ -548,6 +557,7 @@ extern int nvm_submit_ppa_list(struct nvm_dev *, struct ppa_addr *, int, int,
int, void *, int);
extern int nvm_bb_tbl_fold(struct nvm_dev *, u8 *, int);
extern int nvm_get_bb_tbl(struct nvm_dev *, struct ppa_addr, u8 *);
+extern int nvm_get_tgt_bb_tbl(struct nvm_tgt_dev *, struct ppa_addr, u8 *);
/* sysblk.c */
#define NVM_SYSBLK_MAGIC 0x4E564D53 /* "NVMS" */
@@ -569,10 +579,10 @@ extern int nvm_init_sysblock(struct nvm_dev *, struct nvm_sb_info *);
extern int nvm_dev_factory(struct nvm_dev *, int flags);
-#define nvm_for_each_lun_ppa(dev, ppa, chid, lunid) \
- for ((chid) = 0, (ppa).ppa = 0; (chid) < (dev)->nr_chnls; \
+#define nvm_for_each_lun_ppa(geo, ppa, chid, lunid) \
+ for ((chid) = 0, (ppa).ppa = 0; (chid) < (geo)->nr_chnls; \
(chid)++, (ppa).g.ch = (chid)) \
- for ((lunid) = 0; (lunid) < (dev)->luns_per_chnl; \
+ for ((lunid) = 0; (lunid) < (geo)->luns_per_chnl; \
(lunid)++, (ppa).g.lun = (lunid))
#else /* CONFIG_NVM */
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-20 04:49:06 +0000