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lightnvm: introduce nvm_rq_to_ppa_list 

There is a number of places in the lightnvm subsystem where the user
iterates over the ppa list. Before iterating, the user must know if it
is a single or multiple LBAs due to vector commands using either the
nvm_rq ->ppa_addr or ->ppa_list fields on command submission, which
leads to open-coding the if/else statement.

Instead of having multiple if/else's, move it into a function that can
be called by its users.

A nice side effect of this cleanup is that this patch fixes up a
bunch of cases where we don't consider the single-ppa case in pblk.

Signed-off-by: Hans Holmberg <hans.holmberg@cnexlabs.com>
Signed-off-by: Matias Bjørling <mb@lightnvm.io>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Hans Holmberg 2018-10-09 13:11:46 +02:00 committed by Jens Axboe
parent 9cc85bc761
commit d68a934404
7 changed files with 34 additions and 37 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
drivers/lightnvm/core.c
View File

@ -603,22 +603,16 @@ static void nvm_ppa_dev_to_tgt(struct nvm_tgt_dev *tgt_dev,
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;
}
struct ppa_addr *ppa_list = nvm_rq_to_ppa_list(rqd);
nvm_ppa_tgt_to_dev(tgt_dev, rqd->ppa_list, rqd->nr_ppas);
nvm_ppa_tgt_to_dev(tgt_dev, 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;
}
struct ppa_addr *ppa_list = nvm_rq_to_ppa_list(rqd);
nvm_ppa_dev_to_tgt(tgt_dev, rqd->ppa_list, rqd->nr_ppas);
nvm_ppa_dev_to_tgt(tgt_dev, ppa_list, rqd->nr_ppas);
}
int nvm_register_tgt_type(struct nvm_tgt_type *tt)

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

@ -88,13 +88,14 @@ void pblk_map_rq(struct pblk *pblk, struct nvm_rq *rqd, unsigned int sentry,
unsigned int off)
{
struct pblk_sec_meta *meta_list = rqd->meta_list;
struct ppa_addr *ppa_list = nvm_rq_to_ppa_list(rqd);
unsigned int map_secs;
int min = pblk->min_write_pgs;
int i;
for (i = off; i < rqd->nr_ppas; i += min) {
map_secs = (i + min > valid_secs) ? (valid_secs % min) : min;
if (pblk_map_page_data(pblk, sentry + i, &rqd->ppa_list[i],
if (pblk_map_page_data(pblk, sentry + i, &ppa_list[i],
lun_bitmap, &meta_list[i], map_secs)) {
bio_put(rqd->bio);
pblk_free_rqd(pblk, rqd, PBLK_WRITE);
@ -112,6 +113,7 @@ void pblk_map_erase_rq(struct pblk *pblk, struct nvm_rq *rqd,
struct nvm_geo *geo = &dev->geo;
struct pblk_line_meta *lm = &pblk->lm;
struct pblk_sec_meta *meta_list = rqd->meta_list;
struct ppa_addr *ppa_list = nvm_rq_to_ppa_list(rqd);
struct pblk_line *e_line, *d_line;
unsigned int map_secs;
int min = pblk->min_write_pgs;
@ -119,14 +121,14 @@ void pblk_map_erase_rq(struct pblk *pblk, struct nvm_rq *rqd,
for (i = 0; i < rqd->nr_ppas; i += min) {
map_secs = (i + min > valid_secs) ? (valid_secs % min) : min;
if (pblk_map_page_data(pblk, sentry + i, &rqd->ppa_list[i],
if (pblk_map_page_data(pblk, sentry + i, &ppa_list[i],
lun_bitmap, &meta_list[i], map_secs)) {
bio_put(rqd->bio);
pblk_free_rqd(pblk, rqd, PBLK_WRITE);
pblk_pipeline_stop(pblk);
}
erase_lun = pblk_ppa_to_pos(geo, rqd->ppa_list[i]);
erase_lun = pblk_ppa_to_pos(geo, ppa_list[i]);
/* line can change after page map. We might also be writing the
* last line.
@ -141,7 +143,7 @@ void pblk_map_erase_rq(struct pblk *pblk, struct nvm_rq *rqd,
set_bit(erase_lun, e_line->erase_bitmap);
atomic_dec(&e_line->left_eblks);
*erase_ppa = rqd->ppa_list[i];
*erase_ppa = ppa_list[i];
erase_ppa->a.blk = e_line->id;
spin_unlock(&e_line->lock);

11
drivers/lightnvm/pblk-read.c
View File

@ -116,10 +116,9 @@ static void pblk_read_check_seq(struct pblk *pblk, struct nvm_rq *rqd,
if (lba != blba + i) {
#ifdef CONFIG_NVM_PBLK_DEBUG
struct ppa_addr *p;
struct ppa_addr *ppa_list = nvm_rq_to_ppa_list(rqd);
p = (nr_lbas == 1) ? &rqd->ppa_list[i] : &rqd->ppa_addr;
print_ppa(pblk, p, "seq", i);
print_ppa(pblk, &ppa_list[i], "seq", i);
#endif
pblk_err(pblk, "corrupted read LBA (%llu/%llu)\n",
lba, (u64)blba + i);
@ -148,11 +147,9 @@ static void pblk_read_check_rand(struct pblk *pblk, struct nvm_rq *rqd,
if (lba != meta_lba) {
#ifdef CONFIG_NVM_PBLK_DEBUG
struct ppa_addr *p;
int nr_ppas = rqd->nr_ppas;
struct ppa_addr *ppa_list = nvm_rq_to_ppa_list(rqd);
p = (nr_ppas == 1) ? &rqd->ppa_list[j] : &rqd->ppa_addr;
print_ppa(pblk, p, "seq", j);
print_ppa(pblk, &ppa_list[j], "seq", j);
#endif
pblk_err(pblk, "corrupted read LBA (%llu/%llu)\n",
lba, meta_lba);

9
drivers/lightnvm/pblk-recovery.c
View File

@ -161,6 +161,8 @@ static int pblk_recov_read_oob(struct pblk *pblk, struct pblk_line *line,
if (pblk_io_aligned(pblk, rq_ppas))
rqd->is_seq = 1;
ppa_list = nvm_rq_to_ppa_list(rqd);
for (i = 0; i < rqd->nr_ppas; ) {
struct ppa_addr ppa;
int pos;
@ -175,7 +177,7 @@ static int pblk_recov_read_oob(struct pblk *pblk, struct pblk_line *line,
}
for (j = 0; j < pblk->min_write_pgs; j++, i++, r_ptr_int++)
rqd->ppa_list[i] =
ppa_list[i] =
addr_to_gen_ppa(pblk, r_ptr_int, line->id);
}
@ -202,7 +204,7 @@ static int pblk_recov_read_oob(struct pblk *pblk, struct pblk_line *line,
if (lba == ADDR_EMPTY || lba > pblk->rl.nr_secs)
continue;
pblk_update_map(pblk, lba, rqd->ppa_list[i]);
pblk_update_map(pblk, lba, ppa_list[i]);
}
left_ppas -= rq_ppas;
@ -221,10 +223,11 @@ static void pblk_recov_complete(struct kref *ref)
static void pblk_end_io_recov(struct nvm_rq *rqd)
{
struct ppa_addr *ppa_list = nvm_rq_to_ppa_list(rqd);
struct pblk_pad_rq *pad_rq = rqd->private;
struct pblk *pblk = pad_rq->pblk;
pblk_up_page(pblk, rqd->ppa_list, rqd->nr_ppas);
pblk_up_page(pblk, ppa_list, rqd->nr_ppas);
pblk_free_rqd(pblk, rqd, PBLK_WRITE_INT);

18
drivers/lightnvm/pblk-write.c
View File

@ -208,15 +208,10 @@ static void pblk_submit_rec(struct work_struct *work)
struct pblk *pblk = recovery->pblk;
struct nvm_rq *rqd = recovery->rqd;
struct pblk_c_ctx *c_ctx = nvm_rq_to_pdu(rqd);
struct ppa_addr *ppa_list;
struct ppa_addr *ppa_list = nvm_rq_to_ppa_list(rqd);
pblk_log_write_err(pblk, rqd);
if (rqd->nr_ppas == 1)
ppa_list = &rqd->ppa_addr;
else
ppa_list = rqd->ppa_list;
pblk_map_remaining(pblk, ppa_list);
pblk_queue_resubmit(pblk, c_ctx);
@ -273,9 +268,10 @@ static void pblk_end_io_write_meta(struct nvm_rq *rqd)
struct pblk_g_ctx *m_ctx = nvm_rq_to_pdu(rqd);
struct pblk_line *line = m_ctx->private;
struct pblk_emeta *emeta = line->emeta;
struct ppa_addr *ppa_list = nvm_rq_to_ppa_list(rqd);
int sync;
pblk_up_page(pblk, rqd->ppa_list, rqd->nr_ppas);
pblk_up_page(pblk, ppa_list, rqd->nr_ppas);
if (rqd->error) {
pblk_log_write_err(pblk, rqd);
@ -375,6 +371,7 @@ int pblk_submit_meta_io(struct pblk *pblk, struct pblk_line *meta_line)
struct pblk_line_mgmt *l_mg = &pblk->l_mg;
struct pblk_line_meta *lm = &pblk->lm;
struct pblk_emeta *emeta = meta_line->emeta;
struct ppa_addr *ppa_list;
struct pblk_g_ctx *m_ctx;
struct bio *bio;
struct nvm_rq *rqd;
@ -409,12 +406,13 @@ int pblk_submit_meta_io(struct pblk *pblk, struct pblk_line *meta_line)
if (ret)
goto fail_free_bio;
ppa_list = nvm_rq_to_ppa_list(rqd);
for (i = 0; i < rqd->nr_ppas; ) {
spin_lock(&meta_line->lock);
paddr = __pblk_alloc_page(pblk, meta_line, rq_ppas);
spin_unlock(&meta_line->lock);
for (j = 0; j < rq_ppas; j++, i++, paddr++)
rqd->ppa_list[i] = addr_to_gen_ppa(pblk, paddr, id);
ppa_list[i] = addr_to_gen_ppa(pblk, paddr, id);
}
spin_lock(&l_mg->close_lock);
@ -423,7 +421,7 @@ int pblk_submit_meta_io(struct pblk *pblk, struct pblk_line *meta_line)
list_del(&meta_line->list);
spin_unlock(&l_mg->close_lock);
pblk_down_page(pblk, rqd->ppa_list, rqd->nr_ppas);
pblk_down_page(pblk, ppa_list, rqd->nr_ppas);
ret = pblk_submit_io(pblk, rqd);
if (ret) {
@ -434,7 +432,7 @@ int pblk_submit_meta_io(struct pblk *pblk, struct pblk_line *meta_line)
return NVM_IO_OK;
fail_rollback:
pblk_up_page(pblk, rqd->ppa_list, rqd->nr_ppas);
pblk_up_page(pblk, ppa_list, rqd->nr_ppas);
spin_lock(&l_mg->close_lock);
pblk_dealloc_page(pblk, meta_line, rq_ppas);
list_add(&meta_line->list, &meta_line->list);

4
drivers/lightnvm/pblk.h
View File

@ -1362,9 +1362,7 @@ static inline int pblk_boundary_ppa_checks(struct nvm_tgt_dev *tgt_dev,
static inline int pblk_check_io(struct pblk *pblk, struct nvm_rq *rqd)
{
struct nvm_tgt_dev *dev = pblk->dev;
struct ppa_addr *ppa_list;
ppa_list = (rqd->nr_ppas > 1) ? rqd->ppa_list : &rqd->ppa_addr;
struct ppa_addr *ppa_list = nvm_rq_to_ppa_list(rqd);
if (pblk_boundary_ppa_checks(dev, ppa_list, rqd->nr_ppas)) {
WARN_ON(1);

5
include/linux/lightnvm.h
View File

@ -320,6 +320,11 @@ static inline void *nvm_rq_to_pdu(struct nvm_rq *rqdata)
return rqdata + 1;
}
static inline struct ppa_addr *nvm_rq_to_ppa_list(struct nvm_rq *rqd)
{
return (rqd->nr_ppas > 1) ? rqd->ppa_list : &rqd->ppa_addr;
}
enum {
NVM_BLK_ST_FREE = 0x1, /* Free block */
NVM_BLK_ST_TGT = 0x2, /* Block in use by target */