509 строки
11 KiB
C
509 строки
11 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef NVM_H
|
|
#define NVM_H
|
|
|
|
#include <linux/blkdev.h>
|
|
#include <linux/types.h>
|
|
#include <uapi/linux/lightnvm.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 (7)
|
|
|
|
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;
|
|
u64 reserved : 1;
|
|
} g;
|
|
|
|
struct {
|
|
u64 line : 63;
|
|
u64 is_cached : 1;
|
|
} c;
|
|
|
|
u64 ppa;
|
|
};
|
|
};
|
|
|
|
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 *);
|
|
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, u8 *);
|
|
typedef int (nvm_op_set_bb_fn)(struct nvm_dev *, struct ppa_addr *, int, int);
|
|
typedef int (nvm_submit_io_fn)(struct nvm_dev *, struct nvm_rq *);
|
|
typedef int (nvm_submit_io_sync_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_submit_io_sync_fn *submit_io_sync;
|
|
|
|
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 = 1,
|
|
NVM_PLANE_DOUBLE = 2,
|
|
NVM_PLANE_QUAD = 4,
|
|
|
|
/* Status codes */
|
|
NVM_RSP_SUCCESS = 0x0,
|
|
NVM_RSP_NOT_CHANGEABLE = 0x1,
|
|
NVM_RSP_ERR_FAILWRITE = 0x40ff,
|
|
NVM_RSP_ERR_EMPTYPAGE = 0x42ff,
|
|
NVM_RSP_ERR_FAILECC = 0x4281,
|
|
NVM_RSP_ERR_FAILCRC = 0x4004,
|
|
NVM_RSP_WARN_HIGHECC = 0x4700,
|
|
|
|
/* 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_ENABLE = 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,
|
|
|
|
/* Device capabilities */
|
|
NVM_ID_DCAP_BBLKMGMT = 0x1,
|
|
NVM_UD_DCAP_ECC = 0x2,
|
|
};
|
|
|
|
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;
|
|
u32 cap;
|
|
u32 dom;
|
|
struct nvm_addr_format ppaf;
|
|
struct nvm_id_group grp;
|
|
} __packed;
|
|
|
|
struct nvm_target {
|
|
struct list_head list;
|
|
struct nvm_tgt_dev *dev;
|
|
struct nvm_tgt_type *type;
|
|
struct gendisk *disk;
|
|
};
|
|
|
|
#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_dev *dev;
|
|
|
|
struct bio *bio;
|
|
|
|
union {
|
|
struct ppa_addr ppa_addr;
|
|
dma_addr_t dma_ppa_list;
|
|
};
|
|
|
|
struct ppa_addr *ppa_list;
|
|
|
|
void *meta_list;
|
|
dma_addr_t dma_meta_list;
|
|
|
|
struct completion *wait;
|
|
nvm_end_io_fn *end_io;
|
|
|
|
uint8_t opcode;
|
|
uint16_t nr_ppas;
|
|
uint16_t flags;
|
|
|
|
u64 ppa_status; /* ppa media status */
|
|
int error;
|
|
|
|
void *private;
|
|
};
|
|
|
|
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;
|
|
}
|
|
|
|
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 */
|
|
};
|
|
|
|
/* 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 sec_per_pg; /* only sectors for a single page */
|
|
int pgs_per_blk;
|
|
int blks_per_lun;
|
|
int fpg_size;
|
|
int pfpg_size; /* size of buffer if all pages are to be read */
|
|
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;
|
|
};
|
|
|
|
/* sub-device structure */
|
|
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;
|
|
|
|
/* Device information */
|
|
struct nvm_geo geo;
|
|
|
|
/* lower page table */
|
|
int lps_per_blk;
|
|
int *lptbl;
|
|
|
|
unsigned long total_secs;
|
|
|
|
unsigned long *lun_map;
|
|
void *dma_pool;
|
|
|
|
struct nvm_id identity;
|
|
|
|
/* Backend device */
|
|
struct request_queue *q;
|
|
char name[DISK_NAME_LEN];
|
|
void *private_data;
|
|
|
|
void *rmap;
|
|
|
|
struct mutex mlock;
|
|
spinlock_t lock;
|
|
|
|
/* target management */
|
|
struct list_head area_list;
|
|
struct list_head targets;
|
|
};
|
|
|
|
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_tgt_dev *tgt_dev,
|
|
struct ppa_addr r)
|
|
{
|
|
struct nvm_geo *geo = &tgt_dev->geo;
|
|
struct ppa_addr l;
|
|
|
|
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;
|
|
}
|
|
|
|
static inline struct ppa_addr dev_to_generic_addr(struct nvm_tgt_dev *tgt_dev,
|
|
struct ppa_addr r)
|
|
{
|
|
struct nvm_geo *geo = &tgt_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 >> 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;
|
|
}
|
|
|
|
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 int ppa_cmp_blk(struct ppa_addr ppa1, struct ppa_addr ppa2)
|
|
{
|
|
if (ppa_empty(ppa1) || ppa_empty(ppa2))
|
|
return 0;
|
|
|
|
return ((ppa1.g.ch == ppa2.g.ch) && (ppa1.g.lun == ppa2.g.lun) &&
|
|
(ppa1.g.blk == ppa2.g.blk));
|
|
}
|
|
|
|
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_tgt_dev *, struct gendisk *,
|
|
int flags);
|
|
typedef void (nvm_tgt_exit_fn)(void *);
|
|
typedef int (nvm_tgt_sysfs_init_fn)(struct gendisk *);
|
|
typedef void (nvm_tgt_sysfs_exit_fn)(struct gendisk *);
|
|
|
|
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;
|
|
|
|
/* module-specific init/teardown */
|
|
nvm_tgt_init_fn *init;
|
|
nvm_tgt_exit_fn *exit;
|
|
|
|
/* sysfs */
|
|
nvm_tgt_sysfs_init_fn *sysfs_init;
|
|
nvm_tgt_sysfs_exit_fn *sysfs_exit;
|
|
|
|
/* For internal use */
|
|
struct list_head list;
|
|
struct module *owner;
|
|
};
|
|
|
|
extern int nvm_register_tgt_type(struct nvm_tgt_type *);
|
|
extern void nvm_unregister_tgt_type(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);
|
|
|
|
extern struct nvm_dev *nvm_alloc_dev(int);
|
|
extern int nvm_register(struct nvm_dev *);
|
|
extern void nvm_unregister(struct nvm_dev *);
|
|
|
|
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 int nvm_submit_io_sync(struct nvm_tgt_dev *, struct nvm_rq *);
|
|
extern int nvm_erase_sync(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 *);
|
|
extern int nvm_bb_tbl_fold(struct nvm_dev *, u8 *, int);
|
|
extern int nvm_get_tgt_bb_tbl(struct nvm_tgt_dev *, struct ppa_addr, u8 *);
|
|
|
|
extern void nvm_part_to_tgt(struct nvm_dev *, sector_t *, int);
|
|
|
|
#else /* CONFIG_NVM */
|
|
struct nvm_dev_ops;
|
|
|
|
static inline struct nvm_dev *nvm_alloc_dev(int node)
|
|
{
|
|
return ERR_PTR(-EINVAL);
|
|
}
|
|
static inline int nvm_register(struct nvm_dev *dev)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
static inline void nvm_unregister(struct nvm_dev *dev) {}
|
|
#endif /* CONFIG_NVM */
|
|
#endif /* LIGHTNVM.H */
|