mirror of
https://github.com/BobTheBlinker/android_kernel_motorola_sm6375.git
synced 2026-10-25 06:03:36 -04:00
Merge branch 'for-4.4/lightnvm' of git://git.kernel.dk/linux-block
Pull lightnvm support from Jens Axboe:
"This adds support for lightnvm, and adds support to NVMe as well.
This is pretty exciting, in that it enables new and interesting use
cases for compatible flash devices. There's a LWN writeup about an
earlier posting here:
https://lwn.net/Articles/641247/
This has been underway for a while, and should be ready for merging at
this point"
* 'for-4.4/lightnvm' of git://git.kernel.dk/linux-block:
nvme: lightnvm: clean up a data type
lightnvm: refactor phys addrs type to u64
nvme: LightNVM support
rrpc: Round-robin sector target with cost-based gc
gennvm: Generic NVM manager
lightnvm: Support for Open-Channel SSDs
This commit is contained in:
Linus Torvalds
commit
effa04cc5a
17 changed files with 4197 additions and 12 deletions
522
include/linux/lightnvm.h
Normal file
522
include/linux/lightnvm.h
Normal file
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@ -0,0 +1,522 @@
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|||
#ifndef NVM_H
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#define NVM_H
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enum {
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NVM_IO_OK = 0,
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NVM_IO_REQUEUE = 1,
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NVM_IO_DONE = 2,
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NVM_IO_ERR = 3,
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NVM_IOTYPE_NONE = 0,
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NVM_IOTYPE_GC = 1,
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};
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#ifdef CONFIG_NVM
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#include <linux/blkdev.h>
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#include <linux/types.h>
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#include <linux/file.h>
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#include <linux/dmapool.h>
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enum {
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/* HW Responsibilities */
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NVM_RSP_L2P = 1 << 0,
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NVM_RSP_ECC = 1 << 1,
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/* Physical Adressing Mode */
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NVM_ADDRMODE_LINEAR = 0,
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NVM_ADDRMODE_CHANNEL = 1,
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/* Plane programming mode for LUN */
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NVM_PLANE_SINGLE = 0,
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NVM_PLANE_DOUBLE = 1,
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NVM_PLANE_QUAD = 2,
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/* Status codes */
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NVM_RSP_SUCCESS = 0x0,
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NVM_RSP_NOT_CHANGEABLE = 0x1,
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NVM_RSP_ERR_FAILWRITE = 0x40ff,
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NVM_RSP_ERR_EMPTYPAGE = 0x42ff,
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/* Device opcodes */
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NVM_OP_HBREAD = 0x02,
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NVM_OP_HBWRITE = 0x81,
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NVM_OP_PWRITE = 0x91,
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NVM_OP_PREAD = 0x92,
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NVM_OP_ERASE = 0x90,
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/* PPA Command Flags */
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NVM_IO_SNGL_ACCESS = 0x0,
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NVM_IO_DUAL_ACCESS = 0x1,
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NVM_IO_QUAD_ACCESS = 0x2,
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NVM_IO_SUSPEND = 0x80,
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NVM_IO_SLC_MODE = 0x100,
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NVM_IO_SCRAMBLE_DISABLE = 0x200,
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};
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struct nvm_id_group {
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u8 mtype;
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u8 fmtype;
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u16 res16;
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u8 num_ch;
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u8 num_lun;
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u8 num_pln;
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u16 num_blk;
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u16 num_pg;
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u16 fpg_sz;
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u16 csecs;
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u16 sos;
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u32 trdt;
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u32 trdm;
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u32 tprt;
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u32 tprm;
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u32 tbet;
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u32 tbem;
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u32 mpos;
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u16 cpar;
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u8 res[913];
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} __packed;
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struct nvm_addr_format {
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u8 ch_offset;
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u8 ch_len;
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u8 lun_offset;
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u8 lun_len;
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u8 pln_offset;
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u8 pln_len;
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u8 blk_offset;
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u8 blk_len;
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u8 pg_offset;
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u8 pg_len;
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u8 sect_offset;
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u8 sect_len;
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u8 res[4];
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};
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struct nvm_id {
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u8 ver_id;
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u8 vmnt;
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u8 cgrps;
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u8 res[5];
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u32 cap;
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u32 dom;
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struct nvm_addr_format ppaf;
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u8 ppat;
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u8 resv[224];
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struct nvm_id_group groups[4];
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} __packed;
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||||
|
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struct nvm_target {
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struct list_head list;
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struct nvm_tgt_type *type;
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struct gendisk *disk;
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};
|
||||
|
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struct nvm_tgt_instance {
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struct nvm_tgt_type *tt;
|
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};
|
||||
|
||||
#define ADDR_EMPTY (~0ULL)
|
||||
|
||||
#define NVM_VERSION_MAJOR 1
|
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#define NVM_VERSION_MINOR 0
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#define NVM_VERSION_PATCH 0
|
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|
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#define NVM_SEC_BITS (8)
|
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#define NVM_PL_BITS (6)
|
||||
#define NVM_PG_BITS (16)
|
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#define NVM_BLK_BITS (16)
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#define NVM_LUN_BITS (10)
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#define NVM_CH_BITS (8)
|
||||
|
||||
struct ppa_addr {
|
||||
union {
|
||||
/* Channel-based PPA format in nand 4x2x2x2x8x10 */
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struct {
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u64 ch : 4;
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u64 sec : 2; /* 4 sectors per page */
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u64 pl : 2; /* 4 planes per LUN */
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u64 lun : 2; /* 4 LUNs per channel */
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u64 pg : 8; /* 256 pages per block */
|
||||
u64 blk : 10;/* 1024 blocks per plane */
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||||
u64 resved : 36;
|
||||
} chnl;
|
||||
|
||||
/* Generic structure for all addresses */
|
||||
struct {
|
||||
u64 sec : NVM_SEC_BITS;
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||||
u64 pl : NVM_PL_BITS;
|
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u64 pg : NVM_PG_BITS;
|
||||
u64 blk : NVM_BLK_BITS;
|
||||
u64 lun : NVM_LUN_BITS;
|
||||
u64 ch : NVM_CH_BITS;
|
||||
} g;
|
||||
|
||||
u64 ppa;
|
||||
};
|
||||
} __packed;
|
||||
|
||||
struct nvm_rq {
|
||||
struct nvm_tgt_instance *ins;
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struct nvm_dev *dev;
|
||||
|
||||
struct bio *bio;
|
||||
|
||||
union {
|
||||
struct ppa_addr ppa_addr;
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||||
dma_addr_t dma_ppa_list;
|
||||
};
|
||||
|
||||
struct ppa_addr *ppa_list;
|
||||
|
||||
void *metadata;
|
||||
dma_addr_t dma_metadata;
|
||||
|
||||
uint8_t opcode;
|
||||
uint16_t nr_pages;
|
||||
uint16_t flags;
|
||||
};
|
||||
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||||
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)
|
||||
{
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||||
return rqdata + 1;
|
||||
}
|
||||
|
||||
struct nvm_block;
|
||||
|
||||
typedef int (nvm_l2p_update_fn)(u64, u32, __le64 *, void *);
|
||||
typedef int (nvm_bb_update_fn)(u32, void *, unsigned int, void *);
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||||
typedef int (nvm_id_fn)(struct request_queue *, struct nvm_id *);
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||||
typedef int (nvm_get_l2p_tbl_fn)(struct request_queue *, u64, u32,
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nvm_l2p_update_fn *, void *);
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typedef int (nvm_op_bb_tbl_fn)(struct request_queue *, int, unsigned int,
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nvm_bb_update_fn *, void *);
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typedef int (nvm_op_set_bb_fn)(struct request_queue *, struct nvm_rq *, int);
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typedef int (nvm_submit_io_fn)(struct request_queue *, struct nvm_rq *);
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typedef int (nvm_erase_blk_fn)(struct request_queue *, struct nvm_rq *);
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typedef void *(nvm_create_dma_pool_fn)(struct request_queue *, char *);
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typedef void (nvm_destroy_dma_pool_fn)(void *);
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||||
typedef void *(nvm_dev_dma_alloc_fn)(struct request_queue *, void *, gfp_t,
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||||
dma_addr_t *);
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||||
typedef void (nvm_dev_dma_free_fn)(void *, void*, dma_addr_t);
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||||
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||||
struct nvm_dev_ops {
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nvm_id_fn *identity;
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nvm_get_l2p_tbl_fn *get_l2p_tbl;
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||||
nvm_op_bb_tbl_fn *get_bb_tbl;
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||||
nvm_op_set_bb_fn *set_bb;
|
||||
|
||||
nvm_submit_io_fn *submit_io;
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||||
nvm_erase_blk_fn *erase_block;
|
||||
|
||||
nvm_create_dma_pool_fn *create_dma_pool;
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||||
nvm_destroy_dma_pool_fn *destroy_dma_pool;
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nvm_dev_dma_alloc_fn *dev_dma_alloc;
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nvm_dev_dma_free_fn *dev_dma_free;
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||||
|
||||
uint8_t max_phys_sect;
|
||||
};
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||||
|
||||
struct nvm_lun {
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||||
int id;
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int lun_id;
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||||
int chnl_id;
|
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unsigned int nr_free_blocks; /* Number of unused blocks */
|
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struct nvm_block *blocks;
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spinlock_t lock;
|
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};
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||||
|
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struct nvm_block {
|
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struct list_head list;
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struct nvm_lun *lun;
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||||
unsigned long id;
|
||||
|
||||
void *priv;
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||||
int type;
|
||||
};
|
||||
|
||||
struct nvm_dev {
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struct nvm_dev_ops *ops;
|
||||
|
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struct list_head devices;
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||||
struct list_head online_targets;
|
||||
|
||||
/* Media manager */
|
||||
struct nvmm_type *mt;
|
||||
void *mp;
|
||||
|
||||
/* Device information */
|
||||
int nr_chnls;
|
||||
int nr_planes;
|
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int luns_per_chnl;
|
||||
int sec_per_pg; /* only sectors for a single page */
|
||||
int pgs_per_blk;
|
||||
int blks_per_lun;
|
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int sec_size;
|
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int oob_size;
|
||||
int addr_mode;
|
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struct nvm_addr_format addr_format;
|
||||
|
||||
/* Calculated/Cached values. These do not reflect the actual usable
|
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* blocks at run-time.
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||||
*/
|
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int max_rq_size;
|
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int plane_mode; /* drive device in single, double or quad mode */
|
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|
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int sec_per_pl; /* all sectors across planes */
|
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int sec_per_blk;
|
||||
int sec_per_lun;
|
||||
|
||||
unsigned long total_pages;
|
||||
unsigned long total_blocks;
|
||||
int nr_luns;
|
||||
unsigned max_pages_per_blk;
|
||||
|
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void *ppalist_pool;
|
||||
|
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struct nvm_id identity;
|
||||
|
||||
/* Backend device */
|
||||
struct request_queue *q;
|
||||
char name[DISK_NAME_LEN];
|
||||
};
|
||||
|
||||
/* fallback conversion */
|
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static struct ppa_addr __generic_to_linear_addr(struct nvm_dev *dev,
|
||||
struct ppa_addr r)
|
||||
{
|
||||
struct ppa_addr l;
|
||||
|
||||
l.ppa = r.g.sec +
|
||||
r.g.pg * dev->sec_per_pg +
|
||||
r.g.blk * (dev->pgs_per_blk *
|
||||
dev->sec_per_pg) +
|
||||
r.g.lun * (dev->blks_per_lun *
|
||||
dev->pgs_per_blk *
|
||||
dev->sec_per_pg) +
|
||||
r.g.ch * (dev->blks_per_lun *
|
||||
dev->pgs_per_blk *
|
||||
dev->luns_per_chnl *
|
||||
dev->sec_per_pg);
|
||||
|
||||
return l;
|
||||
}
|
||||
|
||||
/* fallback conversion */
|
||||
static struct ppa_addr __linear_to_generic_addr(struct nvm_dev *dev,
|
||||
struct ppa_addr r)
|
||||
{
|
||||
struct ppa_addr l;
|
||||
int secs, pgs, blks, luns;
|
||||
sector_t ppa = r.ppa;
|
||||
|
||||
l.ppa = 0;
|
||||
|
||||
div_u64_rem(ppa, dev->sec_per_pg, &secs);
|
||||
l.g.sec = secs;
|
||||
|
||||
sector_div(ppa, dev->sec_per_pg);
|
||||
div_u64_rem(ppa, dev->sec_per_blk, &pgs);
|
||||
l.g.pg = pgs;
|
||||
|
||||
sector_div(ppa, dev->pgs_per_blk);
|
||||
div_u64_rem(ppa, dev->blks_per_lun, &blks);
|
||||
l.g.blk = blks;
|
||||
|
||||
sector_div(ppa, dev->blks_per_lun);
|
||||
div_u64_rem(ppa, dev->luns_per_chnl, &luns);
|
||||
l.g.lun = luns;
|
||||
|
||||
sector_div(ppa, dev->luns_per_chnl);
|
||||
l.g.ch = ppa;
|
||||
|
||||
return l;
|
||||
}
|
||||
|
||||
static struct ppa_addr __generic_to_chnl_addr(struct ppa_addr r)
|
||||
{
|
||||
struct ppa_addr l;
|
||||
|
||||
l.ppa = 0;
|
||||
|
||||
l.chnl.sec = r.g.sec;
|
||||
l.chnl.pl = r.g.pl;
|
||||
l.chnl.pg = r.g.pg;
|
||||
l.chnl.blk = r.g.blk;
|
||||
l.chnl.lun = r.g.lun;
|
||||
l.chnl.ch = r.g.ch;
|
||||
|
||||
return l;
|
||||
}
|
||||
|
||||
static struct ppa_addr __chnl_to_generic_addr(struct ppa_addr r)
|
||||
{
|
||||
struct ppa_addr l;
|
||||
|
||||
l.ppa = 0;
|
||||
|
||||
l.g.sec = r.chnl.sec;
|
||||
l.g.pl = r.chnl.pl;
|
||||
l.g.pg = r.chnl.pg;
|
||||
l.g.blk = r.chnl.blk;
|
||||
l.g.lun = r.chnl.lun;
|
||||
l.g.ch = r.chnl.ch;
|
||||
|
||||
return l;
|
||||
}
|
||||
|
||||
static inline struct ppa_addr addr_to_generic_mode(struct nvm_dev *dev,
|
||||
struct ppa_addr gppa)
|
||||
{
|
||||
switch (dev->addr_mode) {
|
||||
case NVM_ADDRMODE_LINEAR:
|
||||
return __linear_to_generic_addr(dev, gppa);
|
||||
case NVM_ADDRMODE_CHANNEL:
|
||||
return __chnl_to_generic_addr(gppa);
|
||||
default:
|
||||
BUG();
|
||||
}
|
||||
return gppa;
|
||||
}
|
||||
|
||||
static inline struct ppa_addr generic_to_addr_mode(struct nvm_dev *dev,
|
||||
struct ppa_addr gppa)
|
||||
{
|
||||
switch (dev->addr_mode) {
|
||||
case NVM_ADDRMODE_LINEAR:
|
||||
return __generic_to_linear_addr(dev, gppa);
|
||||
case NVM_ADDRMODE_CHANNEL:
|
||||
return __generic_to_chnl_addr(gppa);
|
||||
default:
|
||||
BUG();
|
||||
}
|
||||
return gppa;
|
||||
}
|
||||
|
||||
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;
|
||||
}
|
||||
|
||||
typedef void (nvm_tgt_make_rq_fn)(struct request_queue *, struct bio *);
|
||||
typedef sector_t (nvm_tgt_capacity_fn)(void *);
|
||||
typedef int (nvm_tgt_end_io_fn)(struct nvm_rq *, int);
|
||||
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_tgt_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_end_io_fn)(struct nvm_rq *, int);
|
||||
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_free_blocks_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;
|
||||
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_end_io_fn *end_io;
|
||||
nvmm_erase_blk_fn *erase_blk;
|
||||
|
||||
/* Configuration management */
|
||||
nvmm_get_lun_fn *get_lun;
|
||||
|
||||
/* Statistics */
|
||||
nvmm_free_blocks_print_fn *free_blocks_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(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 int nvm_erase_blk(struct nvm_dev *, struct nvm_block *);
|
||||
#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 */
|
||||
Loading…
Reference in a new issue