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lightnvm: cleanup nvm transformation functions

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Going from target specific ppa addresses to device was accomplished by
first converting target to generic ppa addresses and generic to device
addresses. The conversion was either open-coded or used the built-in
nvm_trans_* and nvm_map_* functions for conversion. Simplify the
interface and cleanup the calls to provide clean functions that now
either take a list of ppas or a nvm_rq, and is exposed through:

 void nvm_ppa_* - target to/from device with a list of PPAs,
 void nvm_rq_* - target to/from device with a nvm_rq.

Signed-off-by: Matias Bjørling <matias@cnexlabs.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Matias Bjørling 2017-01-31 13:17:14 +01:00 committed by Jens Axboe
parent 61a561d8d7
commit dab8ee9e8a
2 changed files with 42 additions and 91 deletions
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119
drivers/lightnvm/core.c
View File

@ -50,11 +50,6 @@ struct nvm_area {
sector_t end; /* end is excluded */
};
enum {
TRANS_TGT_TO_DEV = 0x0,
TRANS_DEV_TO_TGT = 0x1,
};
static struct nvm_target *nvm_find_target(struct nvm_dev *dev, const char *name)
{
struct nvm_target *tgt;
@ -428,38 +423,46 @@ static void nvm_map_to_tgt(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *p)
p->g.lun -= lun_roff;
}
static void nvm_trans_rq(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd,
int flag)
static void nvm_ppa_tgt_to_dev(struct nvm_tgt_dev *tgt_dev,
struct ppa_addr *ppa_list, int nr_ppas)
{
int i;
if (rqd->nr_ppas == 1) {
if (flag == TRANS_TGT_TO_DEV)
nvm_map_to_dev(tgt_dev, &rqd->ppa_addr);
else
nvm_map_to_tgt(tgt_dev, &rqd->ppa_addr);
return;
}
for (i = 0; i < rqd->nr_ppas; i++) {
if (flag == TRANS_TGT_TO_DEV)
nvm_map_to_dev(tgt_dev, &rqd->ppa_list[i]);
else
nvm_map_to_tgt(tgt_dev, &rqd->ppa_list[i]);
for (i = 0; i < nr_ppas; i++) {
nvm_map_to_dev(tgt_dev, &ppa_list[i]);
ppa_list[i] = generic_to_dev_addr(tgt_dev, ppa_list[i]);
}
}
static struct ppa_addr nvm_trans_ppa(struct nvm_tgt_dev *tgt_dev,
struct ppa_addr p, int dir)
static void nvm_ppa_dev_to_tgt(struct nvm_tgt_dev *tgt_dev,
struct ppa_addr *ppa_list, int nr_ppas)
{
struct ppa_addr ppa = p;
int i;
if (dir == TRANS_TGT_TO_DEV)
nvm_map_to_dev(tgt_dev, &ppa);
else
nvm_map_to_tgt(tgt_dev, &ppa);
for (i = 0; i < nr_ppas; i++) {
ppa_list[i] = dev_to_generic_addr(tgt_dev, ppa_list[i]);
nvm_map_to_tgt(tgt_dev, &ppa_list[i]);
}
}
return ppa;
static void nvm_rq_tgt_to_dev(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd)
{
if (rqd->nr_ppas == 1) {
nvm_ppa_tgt_to_dev(tgt_dev, &rqd->ppa_addr, 1);
return;
}
nvm_ppa_tgt_to_dev(tgt_dev, rqd->ppa_list, rqd->nr_ppas);
}
static void nvm_rq_dev_to_tgt(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd)
{
if (rqd->nr_ppas == 1) {
nvm_ppa_dev_to_tgt(tgt_dev, &rqd->ppa_addr, 1);
return;
}
nvm_ppa_dev_to_tgt(tgt_dev, rqd->ppa_list, rqd->nr_ppas);
}
void nvm_part_to_tgt(struct nvm_dev *dev, sector_t *entries,
@ -564,26 +567,6 @@ static struct nvm_dev *nvm_find_nvm_dev(const char *name)
return NULL;
}
static void nvm_tgt_generic_to_addr_mode(struct nvm_tgt_dev *tgt_dev,
struct nvm_rq *rqd)
{
struct nvm_dev *dev = tgt_dev->parent;
int i;
if (rqd->nr_ppas > 1) {
for (i = 0; i < rqd->nr_ppas; i++) {
rqd->ppa_list[i] = nvm_trans_ppa(tgt_dev,
rqd->ppa_list[i], TRANS_TGT_TO_DEV);
rqd->ppa_list[i] = generic_to_dev_addr(dev,
rqd->ppa_list[i]);
}
} else {
rqd->ppa_addr = nvm_trans_ppa(tgt_dev, rqd->ppa_addr,
TRANS_TGT_TO_DEV);
rqd->ppa_addr = generic_to_dev_addr(dev, rqd->ppa_addr);
}
}
int nvm_set_tgt_bb_tbl(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *ppas,
int nr_ppas, int type)
{
@ -599,7 +582,7 @@ int nvm_set_tgt_bb_tbl(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *ppas,
memset(&rqd, 0, sizeof(struct nvm_rq));
nvm_set_rqd_ppalist(dev, &rqd, ppas, nr_ppas, 1);
nvm_tgt_generic_to_addr_mode(tgt_dev, &rqd);
nvm_rq_tgt_to_dev(tgt_dev, &rqd);
ret = dev->ops->set_bb_tbl(dev, &rqd.ppa_addr, rqd.nr_ppas, type);
nvm_free_rqd_ppalist(dev, &rqd);
@ -627,8 +610,7 @@ int nvm_submit_io(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd)
if (!dev->ops->submit_io)
return -ENODEV;
/* Convert address space */
nvm_generic_to_addr_mode(dev, rqd);
nvm_rq_tgt_to_dev(tgt_dev, rqd);
rqd->dev = tgt_dev;
return dev->ops->submit_io(dev, rqd);
@ -652,7 +634,7 @@ int nvm_erase_blk(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *ppas, int flags)
if (ret)
return ret;
nvm_generic_to_addr_mode(dev, &rqd);
nvm_rq_tgt_to_dev(tgt_dev, &rqd);
rqd.flags = flags;
@ -741,34 +723,6 @@ void nvm_put_area(struct nvm_tgt_dev *tgt_dev, sector_t begin)
}
EXPORT_SYMBOL(nvm_put_area);
void nvm_addr_to_generic_mode(struct nvm_dev *dev, struct nvm_rq *rqd)
{
int i;
if (rqd->nr_ppas > 1) {
for (i = 0; i < rqd->nr_ppas; i++)
rqd->ppa_list[i] = dev_to_generic_addr(dev,
rqd->ppa_list[i]);
} else {
rqd->ppa_addr = dev_to_generic_addr(dev, rqd->ppa_addr);
}
}
EXPORT_SYMBOL(nvm_addr_to_generic_mode);
void nvm_generic_to_addr_mode(struct nvm_dev *dev, struct nvm_rq *rqd)
{
int i;
if (rqd->nr_ppas > 1) {
for (i = 0; i < rqd->nr_ppas; i++)
rqd->ppa_list[i] = generic_to_dev_addr(dev,
rqd->ppa_list[i]);
} else {
rqd->ppa_addr = generic_to_dev_addr(dev, rqd->ppa_addr);
}
}
EXPORT_SYMBOL(nvm_generic_to_addr_mode);
int nvm_set_rqd_ppalist(struct nvm_dev *dev, struct nvm_rq *rqd,
const struct ppa_addr *ppas, int nr_ppas, int vblk)
{
@ -826,7 +780,7 @@ void nvm_end_io(struct nvm_rq *rqd, int error)
/* Convert address space */
if (tgt_dev)
nvm_trans_rq(tgt_dev, rqd, TRANS_DEV_TO_TGT);
nvm_rq_dev_to_tgt(tgt_dev, rqd);
rqd->error = error;
ins->tt->end_io(rqd);
@ -874,8 +828,7 @@ int nvm_get_tgt_bb_tbl(struct nvm_tgt_dev *tgt_dev, struct ppa_addr ppa,
{
struct nvm_dev *dev = tgt_dev->parent;
ppa = nvm_trans_ppa(tgt_dev, ppa, TRANS_TGT_TO_DEV);
ppa = generic_to_dev_addr(dev, ppa);
nvm_ppa_tgt_to_dev(tgt_dev, &ppa, 1);
return dev->ops->get_bb_tbl(dev, ppa, blks);
}

14
include/linux/lightnvm.h
View File

@ -378,10 +378,10 @@ static inline struct ppa_addr linear_to_generic_addr(struct nvm_geo *geo,
return l;
}
static inline struct ppa_addr generic_to_dev_addr(struct nvm_dev *dev,
struct ppa_addr r)
static inline struct ppa_addr generic_to_dev_addr(struct nvm_tgt_dev *tgt_dev,
struct ppa_addr r)
{
struct nvm_geo *geo = &dev->geo;
struct nvm_geo *geo = &tgt_dev->geo;
struct ppa_addr l;
l.ppa = ((u64)r.g.blk) << geo->ppaf.blk_offset;
@ -394,10 +394,10 @@ static inline struct ppa_addr generic_to_dev_addr(struct nvm_dev *dev,
return l;
}
static inline struct ppa_addr dev_to_generic_addr(struct nvm_dev *dev,
struct ppa_addr r)
static inline struct ppa_addr dev_to_generic_addr(struct nvm_tgt_dev *tgt_dev,
struct ppa_addr r)
{
struct nvm_geo *geo = &dev->geo;
struct nvm_geo *geo = &tgt_dev->geo;
struct ppa_addr l;
l.ppa = 0;
@ -477,8 +477,6 @@ 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 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 *,
const struct ppa_addr *, int, int);
extern void nvm_free_rqd_ppalist(struct nvm_dev *, struct nvm_rq *);