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#ifndef NVM_H
#define NVM_H
#include <linux/types.h>
enum {
NVM_IO_OK = 0,
NVM_IO_REQUEUE = 1,
NVM_IO_DONE = 2,
NVM_IO_ERR = 3,
NVM_IOTYPE_NONE = 0,
NVM_IOTYPE_GC = 1,
};
#define NVM_BLK_BITS (16)
#define NVM_PG_BITS (16)
#define NVM_SEC_BITS (8)
#define NVM_PL_BITS (8)
#define NVM_LUN_BITS (8)
#define NVM_CH_BITS (8)
struct ppa_addr {
/* Generic structure for all addresses */
union {
struct {
u64 blk : NVM_BLK_BITS;
u64 pg : NVM_PG_BITS;
u64 sec : NVM_SEC_BITS;
u64 pl : NVM_PL_BITS;
u64 lun : NVM_LUN_BITS;
u64 ch : NVM_CH_BITS;
} g;
u64 ppa;
};
};
struct nvm_rq;
struct nvm_id;
struct nvm_dev;
typedef int (nvm_l2p_update_fn)(u64, u32, __le64 *, void *);
typedef int (nvm_bb_update_fn)(struct ppa_addr, int, u8 *, void *);
typedef int (nvm_id_fn)(struct nvm_dev *, struct nvm_id *);
typedef int (nvm_get_l2p_tbl_fn)(struct nvm_dev *, u64, u32,
nvm_l2p_update_fn *, void *);
typedef int (nvm_op_bb_tbl_fn)(struct nvm_dev *, struct ppa_addr, int,
nvm_bb_update_fn *, void *);
typedef int (nvm_op_set_bb_fn)(struct nvm_dev *, struct nvm_rq *, int);
typedef int (nvm_submit_io_fn)(struct nvm_dev *, struct nvm_rq *);
typedef int (nvm_erase_blk_fn)(struct nvm_dev *, struct nvm_rq *);
typedef void *(nvm_create_dma_pool_fn)(struct nvm_dev *, char *);
typedef void (nvm_destroy_dma_pool_fn)(void *);
typedef void *(nvm_dev_dma_alloc_fn)(struct nvm_dev *, void *, gfp_t,
dma_addr_t *);
typedef void (nvm_dev_dma_free_fn)(void *, void*, dma_addr_t);
struct nvm_dev_ops {
nvm_id_fn *identity;
nvm_get_l2p_tbl_fn *get_l2p_tbl;
nvm_op_bb_tbl_fn *get_bb_tbl;
nvm_op_set_bb_fn *set_bb_tbl;
nvm_submit_io_fn *submit_io;
nvm_erase_blk_fn *erase_block;
nvm_create_dma_pool_fn *create_dma_pool;
nvm_destroy_dma_pool_fn *destroy_dma_pool;
nvm_dev_dma_alloc_fn *dev_dma_alloc;
nvm_dev_dma_free_fn *dev_dma_free;
unsigned int max_phys_sect;
};
#ifdef CONFIG_NVM
#include <linux/blkdev.h>
#include <linux/file.h>
#include <linux/dmapool.h>
#include <uapi/linux/lightnvm.h>
enum {
/* HW Responsibilities */
NVM_RSP_L2P = 1 << 0,
NVM_RSP_ECC = 1 << 1,
/* Physical Adressing Mode */
NVM_ADDRMODE_LINEAR = 0,
NVM_ADDRMODE_CHANNEL = 1,
/* Plane programming mode for LUN */
NVM_PLANE_SINGLE = 0,
NVM_PLANE_DOUBLE = 1,
NVM_PLANE_QUAD = 2,
/* Status codes */
NVM_RSP_SUCCESS = 0x0,
NVM_RSP_NOT_CHANGEABLE = 0x1,
NVM_RSP_ERR_FAILWRITE = 0x40ff,
NVM_RSP_ERR_EMPTYPAGE = 0x42ff,
/* Device opcodes */
NVM_OP_HBREAD = 0x02,
NVM_OP_HBWRITE = 0x81,
NVM_OP_PWRITE = 0x91,
NVM_OP_PREAD = 0x92,
NVM_OP_ERASE = 0x90,
/* PPA Command Flags */
NVM_IO_SNGL_ACCESS = 0x0,
NVM_IO_DUAL_ACCESS = 0x1,
NVM_IO_QUAD_ACCESS = 0x2,
/* NAND Access Modes */
NVM_IO_SUSPEND = 0x80,
NVM_IO_SLC_MODE = 0x100,
NVM_IO_SCRAMBLE_DISABLE = 0x200,
/* Block Types */
NVM_BLK_T_FREE = 0x0,
NVM_BLK_T_BAD = 0x1,
NVM_BLK_T_GRWN_BAD = 0x2,
NVM_BLK_T_DEV = 0x4,
NVM_BLK_T_HOST = 0x8,
/* Memory capabilities */
NVM_ID_CAP_SLC = 0x1,
NVM_ID_CAP_CMD_SUSPEND = 0x2,
NVM_ID_CAP_SCRAMBLE = 0x4,
NVM_ID_CAP_ENCRYPT = 0x8,
/* Memory types */
NVM_ID_FMTYPE_SLC = 0,
NVM_ID_FMTYPE_MLC = 1,
};
struct nvm_id_lp_mlc {
u16 num_pairs;
u8 pairs[886];
};
struct nvm_id_lp_tbl {
__u8 id[8];
struct nvm_id_lp_mlc mlc;
};
struct nvm_id_group {
u8 mtype;
u8 fmtype;
u8 num_ch;
u8 num_lun;
u8 num_pln;
u16 num_blk;
u16 num_pg;
u16 fpg_sz;
u16 csecs;
u16 sos;
u32 trdt;
u32 trdm;
u32 tprt;
u32 tprm;
u32 tbet;
u32 tbem;
u32 mpos;
u32 mccap;
u16 cpar;
struct nvm_id_lp_tbl lptbl;
};
struct nvm_addr_format {
u8 ch_offset;
u8 ch_len;
u8 lun_offset;
u8 lun_len;
u8 pln_offset;
u8 pln_len;
u8 blk_offset;
u8 blk_len;
u8 pg_offset;
u8 pg_len;
u8 sect_offset;
u8 sect_len;
};
struct nvm_id {
u8 ver_id;
u8 vmnt;
u8 cgrps;
u32 cap;
u32 dom;
struct nvm_addr_format ppaf;
struct nvm_id_group groups[4];
} __packed;
struct nvm_target {
struct list_head list;
struct nvm_tgt_type *type;
struct gendisk *disk;
};
struct nvm_tgt_instance {
struct nvm_tgt_type *tt;
};
#define ADDR_EMPTY (~0ULL)
#define NVM_VERSION_MAJOR 1
#define NVM_VERSION_MINOR 0
#define NVM_VERSION_PATCH 0
struct nvm_rq;
typedef void (nvm_end_io_fn)(struct nvm_rq *);
struct nvm_rq {
struct nvm_tgt_instance *ins;
struct nvm_dev *dev;
struct bio *bio;
union {
struct ppa_addr ppa_addr;
dma_addr_t dma_ppa_list;
};
struct ppa_addr *ppa_list;
void *metadata;
dma_addr_t dma_metadata;
struct completion *wait;
nvm_end_io_fn *end_io;
uint8_t opcode;
uint16_t nr_pages;
uint16_t flags;
int error;
};
static inline struct nvm_rq *nvm_rq_from_pdu(void *pdu)
{
return pdu - sizeof(struct nvm_rq);
}
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;
/* It is up to the target to mark blocks as closed. If the target does
* not do it, all blocks are marked as open, and nr_open_blocks
* represents the number of blocks in use
*/
unsigned int nr_open_blocks; /* Number of used, writable blocks */
unsigned int nr_closed_blocks; /* Number of used, read-only blocks */
unsigned int nr_free_blocks; /* Number of unused blocks */
unsigned int nr_bad_blocks; /* Number of bad blocks */
spinlock_t lock;
struct nvm_block *blocks;
};
enum {
NVM_BLK_ST_FREE = 0x1, /* Free block */
NVM_BLK_ST_OPEN = 0x2, /* Open block - read-write */
NVM_BLK_ST_CLOSED = 0x4, /* Closed block - read-only */
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;
unsigned long erase_cnt;
unsigned int version;
char mmtype[NVM_MMTYPE_LEN];
struct ppa_addr fs_ppa;
};
struct nvm_dev {
struct nvm_dev_ops *ops;
struct list_head devices;
struct list_head online_targets;
/* Media manager */
struct nvmm_type *mt;
void *mp;
/* System blocks */
struct nvm_sb_info sb;
/* Device information */
int nr_chnls;
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;
int sec_size;
int oob_size;
int mccap;
struct nvm_addr_format ppaf;
/* Calculated/Cached values. These do not reflect the actual usable
* blocks at run-time.
*/
int max_rq_size;
int plane_mode; /* drive device in single, double or quad mode */
int sec_per_pl; /* all sectors across planes */
int sec_per_blk;
int sec_per_lun;
/* lower page table */
int lps_per_blk;
int *lptbl;
unsigned long total_pages;
unsigned long total_blocks;
int nr_luns;
unsigned max_pages_per_blk;
void *ppalist_pool;
struct nvm_id identity;
/* Backend device */
struct request_queue *q;
char name[DISK_NAME_LEN];
struct mutex mlock;
};
static inline struct ppa_addr generic_to_dev_addr(struct nvm_dev *dev,
struct ppa_addr r)
{
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;
return l;
}
static inline struct ppa_addr dev_to_generic_addr(struct nvm_dev *dev,
struct ppa_addr r)
{
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));
return l;
}
static inline int ppa_empty(struct ppa_addr ppa_addr)
{
return (ppa_addr.ppa == ADDR_EMPTY);
}
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)
{
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;
return ppa;
}
static inline int ppa_to_slc(struct nvm_dev *dev, int slc_pg)
{
return dev->lptbl[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_exit_fn)(void *);
struct nvm_tgt_type {
const char *name;
unsigned int version[3];
/* target entry points */
nvm_tgt_make_rq_fn *make_rq;
nvm_tgt_capacity_fn *capacity;
nvm_end_io_fn *end_io;
/* module-specific init/teardown */
nvm_tgt_init_fn *init;
nvm_tgt_exit_fn *exit;
/* For internal use */
struct list_head list;
};
extern int nvm_register_target(struct nvm_tgt_type *);
extern void nvm_unregister_target(struct nvm_tgt_type *);
extern void *nvm_dev_dma_alloc(struct nvm_dev *, gfp_t, dma_addr_t *);
extern void nvm_dev_dma_free(struct nvm_dev *, void *, dma_addr_t);
typedef int (nvmm_register_fn)(struct nvm_dev *);
typedef void (nvmm_unregister_fn)(struct nvm_dev *);
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 struct nvm_lun *(nvmm_get_lun_fn)(struct nvm_dev *, int);
typedef void (nvmm_lun_info_print_fn)(struct nvm_dev *);
struct nvmm_type {
const char *name;
unsigned int version[3];
nvmm_register_fn *register_mgr;
nvmm_unregister_fn *unregister_mgr;
/* Block administration callbacks */
nvmm_get_blk_fn *get_blk_unlocked;
nvmm_put_blk_fn *put_blk_unlocked;
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;
/* Configuration management */
nvmm_get_lun_fn *get_lun;
/* Statistics */
nvmm_lun_info_print_fn *lun_info_print;
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_unlocked(struct nvm_dev *,
struct nvm_lun *, unsigned long);
extern void nvm_put_blk_unlocked(struct nvm_dev *, struct nvm_block *);
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 int nvm_register(struct request_queue *, char *,
struct nvm_dev_ops *);
extern void nvm_unregister(char *);
extern int nvm_submit_io(struct nvm_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 *,
struct ppa_addr *, 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 void nvm_end_io(struct nvm_rq *, int);
extern int nvm_submit_ppa(struct nvm_dev *, struct ppa_addr *, int, int, int,
void *, int);
/* sysblk.c */
#define NVM_SYSBLK_MAGIC 0x4E564D53 /* "NVMS" */
/* system block on disk representation */
struct nvm_system_block {
__be32 magic; /* magic signature */
__be32 seqnr; /* sequence number */
__be32 erase_cnt; /* erase count */
__be16 version; /* version number */
u8 mmtype[NVM_MMTYPE_LEN]; /* media manager name */
__be64 fs_ppa; /* PPA for media manager
* superblock */
};
extern int nvm_get_sysblock(struct nvm_dev *, struct nvm_sb_info *);
extern int nvm_update_sysblock(struct nvm_dev *, struct nvm_sb_info *);
extern int nvm_init_sysblock(struct nvm_dev *, struct nvm_sb_info *);
extern int nvm_dev_factory(struct nvm_dev *, int flags);
#else /* CONFIG_NVM */
struct nvm_dev_ops;
static inline int nvm_register(struct request_queue *q, char *disk_name,
struct nvm_dev_ops *ops)
{
return -EINVAL;
}
static inline void nvm_unregister(char *disk_name) {}
#endif /* CONFIG_NVM */
#endif /* LIGHTNVM.H */
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