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lightnvm: implement generic path for sync I/O

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Implement a generic path for sending sync I/O on LightNVM. This allows
to reuse the standard synchronous path trough blk_execute_rq(), instead
of implementing a wait_for_completion on the target side (e.g., pblk).

Signed-off-by: Javier González <javier@cnexlabs.com>
Signed-off-by: Matias Bjørling <m@bjorling.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Javier González
2017-10-13 14:46:47 +02:00
committed by Jens Axboe
parent 1b839187db
commit 1a94b2d484
7 changed files with 145 additions and 125 deletions
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42
drivers/lightnvm/pblk.h
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@@ -714,6 +714,7 @@ void pblk_discard(struct pblk *pblk, struct bio *bio);
void pblk_log_write_err(struct pblk *pblk, struct nvm_rq *rqd);
void pblk_log_read_err(struct pblk *pblk, struct nvm_rq *rqd);
int pblk_submit_io(struct pblk *pblk, struct nvm_rq *rqd);
int pblk_submit_io_sync(struct pblk *pblk, struct nvm_rq *rqd);
int pblk_submit_meta_io(struct pblk *pblk, struct pblk_line *meta_line);
struct bio *pblk_bio_map_addr(struct pblk *pblk, void *data,
unsigned int nr_secs, unsigned int len,
@@ -1203,7 +1204,6 @@ static inline void pblk_print_failed_rqd(struct pblk *pblk, struct nvm_rq *rqd,
pr_err("error:%d, ppa_status:%llx\n", error, rqd->ppa_status);
}
#endif
static inline int pblk_boundary_ppa_checks(struct nvm_tgt_dev *tgt_dev,
struct ppa_addr *ppas, int nr_ppas)
@@ -1224,14 +1224,50 @@ static inline int pblk_boundary_ppa_checks(struct nvm_tgt_dev *tgt_dev,
ppa->g.sec < geo->sec_per_pg)
continue;
#ifdef CONFIG_NVM_DEBUG
print_ppa(ppa, "boundary", i);
#endif
return 1;
}
return 0;
}
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;
if (pblk_boundary_ppa_checks(dev, ppa_list, rqd->nr_ppas)) {
WARN_ON(1);
return -EINVAL;
}
if (rqd->opcode == NVM_OP_PWRITE) {
struct pblk_line *line;
struct ppa_addr ppa;
int i;
for (i = 0; i < rqd->nr_ppas; i++) {
ppa = ppa_list[i];
line = &pblk->lines[pblk_dev_ppa_to_line(ppa)];
spin_lock(&line->lock);
if (line->state != PBLK_LINESTATE_OPEN) {
pr_err("pblk: bad ppa: line:%d,state:%d\n",
line->id, line->state);
WARN_ON(1);
spin_unlock(&line->lock);
return -EINVAL;
}
spin_unlock(&line->lock);
}
}
return 0;
}
#endif
static inline int pblk_boundary_paddr_checks(struct pblk *pblk, u64 paddr)
{
struct pblk_line_meta *lm = &pblk->lm;