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alistair23-linux/include/linux/lightnvm.h
Javier González e53927393b lightnvm: set target over-provision on create ioctl 
Allow to set the over-provision percentage on target creation. In case
that the value is not provided, fall back to the default value set by
the target.

In pblk, set the default OP to 11% of the total size of the device

Signed-off-by: Javier González <javier@cnexlabs.com>
Signed-off-by: Hans Holmberg <hans.holmberg@cnexlabs.com>
Signed-off-by: Matias Bjørling <m@bjorling.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-01-05 08:50:12 -07:00

460 lines
9.4 KiB
C
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/* 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_id_fn)(struct nvm_dev *, struct nvm_id *);
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_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_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;
u16 num_chk;
u16 clba;
u16 csecs;
u16 sos;
u16 ws_min;
u16 ws_opt;
u16 ws_seq;
u16 ws_per_chk;
u32 trdt;
u32 trdm;
u32 tprt;
u32 tprm;
u32 tbet;
u32 tbem;
u32 mpos;
u32 mccap;
u16 cpar;
/* 1.2 compatibility */
u8 num_pln;
u16 num_pg;
u16 fpg_sz;
};
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_TARGET_DEFAULT_OP (101)
#define NVM_TARGET_MIN_OP (3)
#define NVM_TARGET_MAX_OP (80)
#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;
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 {
/* generic geometry */
int nr_chnls;
int all_luns; /* across channels */
int nr_luns; /* per channel */
int nr_chks; /* per lun */
int sec_size;
int oob_size;
int mccap;
int sec_per_chk;
int sec_per_lun;
int ws_min;
int ws_opt;
int ws_seq;
int ws_per_chk;
int max_rq_size;
int op;
struct nvm_addr_format ppaf;
/* Legacy 1.2 specific geometry */
int plane_mode; /* drive device in single, double or quad mode */
int nr_planes;
int sec_per_pg; /* only sectors for a single page */
int sec_per_pl; /* all sectors across planes */
};
/* 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;
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 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;
}
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 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 *);
#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 */
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