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lightnvm: add support for 2.0 address format

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Add support for 2.0 address format. Also, align address bits for 1.2 and
2.0 to be able to operate on channel and luns without requiring a format
conversion. Use a generic address format for this purpose.

Also, convert the generic operations to the generic format in pblk.

Signed-off-by: Javier González <javier@cnexlabs.com>
Signed-off-by: Matias Bjørling <mb@lightnvm.io>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Javier González 2018-03-30 00:05:15 +02:00 committed by Jens Axboe
parent a40afad90b
commit 6947151374
6 changed files with 95 additions and 48 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
drivers/lightnvm/core.c
View File

@ -194,8 +194,8 @@ static struct nvm_tgt_dev *nvm_create_tgt_dev(struct nvm_dev *dev,
for (j = 0; j < luns_in_chnl; j++) {
luns[lunid].ppa = 0;
luns[lunid].g.ch = i;
luns[lunid++].g.lun = j;
luns[lunid].a.ch = i;
luns[lunid++].a.lun = j;
lun_offs[j] = blun;
lun_roffs[j + blun] = blun;
@ -556,22 +556,22 @@ static void nvm_unregister_map(struct nvm_dev *dev)
static void nvm_map_to_dev(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *p)
{
struct nvm_dev_map *dev_map = tgt_dev->map;
struct nvm_ch_map *ch_map = &dev_map->chnls[p->g.ch];
int lun_off = ch_map->lun_offs[p->g.lun];
struct nvm_ch_map *ch_map = &dev_map->chnls[p->a.ch];
int lun_off = ch_map->lun_offs[p->a.lun];
p->g.ch += ch_map->ch_off;
p->g.lun += lun_off;
p->a.ch += ch_map->ch_off;
p->a.lun += lun_off;
}
static void nvm_map_to_tgt(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *p)
{
struct nvm_dev *dev = tgt_dev->parent;
struct nvm_dev_map *dev_rmap = dev->rmap;
struct nvm_ch_map *ch_rmap = &dev_rmap->chnls[p->g.ch];
int lun_roff = ch_rmap->lun_offs[p->g.lun];
struct nvm_ch_map *ch_rmap = &dev_rmap->chnls[p->a.ch];
int lun_roff = ch_rmap->lun_offs[p->a.lun];
p->g.ch -= ch_rmap->ch_off;
p->g.lun -= lun_roff;
p->a.ch -= ch_rmap->ch_off;
p->a.lun -= lun_roff;
}
static void nvm_ppa_tgt_to_dev(struct nvm_tgt_dev *tgt_dev,

10
drivers/lightnvm/pblk-core.c
View File

@ -885,7 +885,7 @@ int pblk_line_erase(struct pblk *pblk, struct pblk_line *line)
}
ppa = pblk->luns[bit].bppa; /* set ch and lun */
ppa.g.blk = line->id;
ppa.a.blk = line->id;
atomic_dec(&line->left_eblks);
WARN_ON(test_and_set_bit(bit, line->erase_bitmap));
@ -1683,8 +1683,8 @@ static void __pblk_down_page(struct pblk *pblk, struct ppa_addr *ppa_list,
int i;
for (i = 1; i < nr_ppas; i++)
WARN_ON(ppa_list[0].g.lun != ppa_list[i].g.lun ||
ppa_list[0].g.ch != ppa_list[i].g.ch);
WARN_ON(ppa_list[0].a.lun != ppa_list[i].a.lun ||
ppa_list[0].a.ch != ppa_list[i].a.ch);
#endif
ret = down_timeout(&rlun->wr_sem, msecs_to_jiffies(30000));
@ -1728,8 +1728,8 @@ void pblk_up_page(struct pblk *pblk, struct ppa_addr *ppa_list, int nr_ppas)
int i;
for (i = 1; i < nr_ppas; i++)
WARN_ON(ppa_list[0].g.lun != ppa_list[i].g.lun ||
ppa_list[0].g.ch != ppa_list[i].g.ch);
WARN_ON(ppa_list[0].a.lun != ppa_list[i].a.lun ||
ppa_list[0].a.ch != ppa_list[i].a.ch);
#endif
rlun = &pblk->luns[pos];

4
drivers/lightnvm/pblk-map.c
View File

@ -127,7 +127,7 @@ void pblk_map_erase_rq(struct pblk *pblk, struct nvm_rq *rqd,
atomic_dec(&e_line->left_eblks);
*erase_ppa = rqd->ppa_list[i];
erase_ppa->g.blk = e_line->id;
erase_ppa->a.blk = e_line->id;
spin_unlock(&e_line->lock);
@ -168,6 +168,6 @@ retry:
set_bit(bit, e_line->erase_bitmap);
atomic_dec(&e_line->left_eblks);
*erase_ppa = pblk->luns[bit].bppa; /* set ch and lun */
erase_ppa->g.blk = e_line->id;
erase_ppa->a.blk = e_line->id;
}
}

4
drivers/lightnvm/pblk-sysfs.c
View File

@ -39,8 +39,8 @@ static ssize_t pblk_sysfs_luns_show(struct pblk *pblk, char *page)
sz += snprintf(page + sz, PAGE_SIZE - sz,
"pblk: pos:%d, ch:%d, lun:%d - %d\n",
i,
rlun->bppa.g.ch,
rlun->bppa.g.lun,
rlun->bppa.a.ch,
rlun->bppa.a.lun,
active);
}

4
drivers/lightnvm/pblk.h
View File

@ -936,12 +936,12 @@ static inline int pblk_pad_distance(struct pblk *pblk)
static inline int pblk_ppa_to_line(struct ppa_addr p)
{
return p.g.blk;
return p.a.blk;
}
static inline int pblk_ppa_to_pos(struct nvm_geo *geo, struct ppa_addr p)
{
return p.g.lun * geo->num_ch + p.g.ch;
return p.a.lun * geo->num_ch + p.a.ch;
}
static inline struct ppa_addr addr_to_gen_ppa(struct pblk *pblk, u64 paddr,

101
include/linux/lightnvm.h
View File

@ -16,12 +16,21 @@ enum {
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)
/* common format */
#define NVM_GEN_CH_BITS (8)
#define NVM_GEN_LUN_BITS (8)
#define NVM_GEN_BLK_BITS (16)
#define NVM_GEN_RESERVED (32)
/* 1.2 format */
#define NVM_12_PG_BITS (16)
#define NVM_12_PL_BITS (4)
#define NVM_12_SEC_BITS (4)
#define NVM_12_RESERVED (8)
/* 2.0 format */
#define NVM_20_SEC_BITS (24)
#define NVM_20_RESERVED (8)
enum {
NVM_OCSSD_SPEC_12 = 12,
@ -31,16 +40,34 @@ enum {
struct ppa_addr {
/* Generic structure for all addresses */
union {
/* generic device format */
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;
u64 ch : NVM_GEN_CH_BITS;
u64 lun : NVM_GEN_LUN_BITS;
u64 blk : NVM_GEN_BLK_BITS;
u64 reserved : NVM_GEN_RESERVED;
} a;
/* 1.2 device format */
struct {
u64 ch : NVM_GEN_CH_BITS;
u64 lun : NVM_GEN_LUN_BITS;
u64 blk : NVM_GEN_BLK_BITS;
u64 pg : NVM_12_PG_BITS;
u64 pl : NVM_12_PL_BITS;
u64 sec : NVM_12_SEC_BITS;
u64 reserved : NVM_12_RESERVED;
} g;
/* 2.0 device format */
struct {
u64 grp : NVM_GEN_CH_BITS;
u64 pu : NVM_GEN_LUN_BITS;
u64 chk : NVM_GEN_BLK_BITS;
u64 sec : NVM_20_SEC_BITS;
u64 reserved : NVM_20_RESERVED;
} m;
struct {
u64 line : 63;
u64 is_cached : 1;
@ -374,15 +401,25 @@ 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 nvm_addrf_12 *ppaf = (struct nvm_addrf_12 *)&geo->addrf;
struct ppa_addr l;
l.ppa = ((u64)r.g.ch) << ppaf->ch_offset;
l.ppa |= ((u64)r.g.lun) << ppaf->lun_offset;
l.ppa |= ((u64)r.g.blk) << ppaf->blk_offset;
l.ppa |= ((u64)r.g.pg) << ppaf->pg_offset;
l.ppa |= ((u64)r.g.pl) << ppaf->pln_offset;
l.ppa |= ((u64)r.g.sec) << ppaf->sec_offset;
if (geo->version == NVM_OCSSD_SPEC_12) {
struct nvm_addrf_12 *ppaf = (struct nvm_addrf_12 *)&geo->addrf;
l.ppa = ((u64)r.g.ch) << ppaf->ch_offset;
l.ppa |= ((u64)r.g.lun) << ppaf->lun_offset;
l.ppa |= ((u64)r.g.blk) << ppaf->blk_offset;
l.ppa |= ((u64)r.g.pg) << ppaf->pg_offset;
l.ppa |= ((u64)r.g.pl) << ppaf->pln_offset;
l.ppa |= ((u64)r.g.sec) << ppaf->sec_offset;
} else {
struct nvm_addrf *lbaf = &geo->addrf;
l.ppa = ((u64)r.m.grp) << lbaf->ch_offset;
l.ppa |= ((u64)r.m.pu) << lbaf->lun_offset;
l.ppa |= ((u64)r.m.chk) << lbaf->chk_offset;
l.ppa |= ((u64)r.m.sec) << lbaf->sec_offset;
}
return l;
}
@ -391,17 +428,27 @@ 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 nvm_addrf_12 *ppaf = (struct nvm_addrf_12 *)&geo->addrf;
struct ppa_addr l;
l.ppa = 0;
l.g.ch = (r.ppa & ppaf->ch_mask) >> ppaf->ch_offset;
l.g.lun = (r.ppa & ppaf->lun_mask) >> ppaf->lun_offset;
l.g.blk = (r.ppa & ppaf->blk_mask) >> ppaf->blk_offset;
l.g.pg = (r.ppa & ppaf->pg_mask) >> ppaf->pg_offset;
l.g.pl = (r.ppa & ppaf->pln_mask) >> ppaf->pln_offset;
l.g.sec = (r.ppa & ppaf->sec_mask) >> ppaf->sec_offset;
if (geo->version == NVM_OCSSD_SPEC_12) {
struct nvm_addrf_12 *ppaf = (struct nvm_addrf_12 *)&geo->addrf;
l.g.ch = (r.ppa & ppaf->ch_mask) >> ppaf->ch_offset;
l.g.lun = (r.ppa & ppaf->lun_mask) >> ppaf->lun_offset;
l.g.blk = (r.ppa & ppaf->blk_mask) >> ppaf->blk_offset;
l.g.pg = (r.ppa & ppaf->pg_mask) >> ppaf->pg_offset;
l.g.pl = (r.ppa & ppaf->pln_mask) >> ppaf->pln_offset;
l.g.sec = (r.ppa & ppaf->sec_mask) >> ppaf->sec_offset;
} else {
struct nvm_addrf *lbaf = &geo->addrf;
l.m.grp = (r.ppa & lbaf->ch_mask) >> lbaf->ch_offset;
l.m.pu = (r.ppa & lbaf->lun_mask) >> lbaf->lun_offset;
l.m.chk = (r.ppa & lbaf->chk_mask) >> lbaf->chk_offset;
l.m.sec = (r.ppa & lbaf->sec_mask) >> lbaf->sec_offset;
}
return l;
}