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lightnvm: move responsibility for bad blk mgmt to target 

We move the responsibility of managing the persistent bad block table to
the target. The target may choose to mark a block bad or retry writing
to it. Never the less, it should be the target that makes the decision
and not the media manager.

Signed-off-by: Matias Bjørling <m@bjorling.me>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Matias Bjørling 2016-05-06 20:03:08 +02:00 committed by Jens Axboe
parent 5ebc7d9fe1
commit a63d5cf203
1 changed files with 16 additions and 19 deletions
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35
drivers/lightnvm/gennvm.c
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@ -419,6 +419,9 @@ static void gennvm_blk_set_type(struct nvm_dev *dev, struct ppa_addr *ppa,
struct gen_lun *lun;
struct nvm_block *blk;
pr_debug("gennvm: ppa (ch: %u lun: %u blk: %u pg: %u) -> %u\n",
ppa->g.ch, ppa->g.lun, ppa->g.blk, ppa->g.pg, type);
if (unlikely(ppa->g.ch > dev->nr_chnls ||
ppa->g.lun > dev->luns_per_chnl ||
ppa->g.blk > dev->blks_per_lun)) {
@ -437,39 +440,33 @@ static void gennvm_blk_set_type(struct nvm_dev *dev, struct ppa_addr *ppa,
blk->state = type;
}
/* mark block bad. It is expected the target recover from the error. */
/*
* mark block bad in gennvm. It is expected that the target recovers separately
*/
static void gennvm_mark_blk_bad(struct nvm_dev *dev, struct nvm_rq *rqd)
{
int i;
if (!dev->ops->set_bb_tbl)
return;
if (dev->ops->set_bb_tbl(dev, rqd, 1))
return;
int bit = -1;
int max_secs = dev->ops->max_phys_sect;
void *comp_bits = &rqd->ppa_status;
nvm_addr_to_generic_mode(dev, rqd);
/* look up blocks and mark them as bad */
if (rqd->nr_pages > 1)
for (i = 0; i < rqd->nr_pages; i++)
gennvm_blk_set_type(dev, &rqd->ppa_list[i],
NVM_BLK_ST_BAD);
else
if (rqd->nr_pages == 1) {
gennvm_blk_set_type(dev, &rqd->ppa_addr, NVM_BLK_ST_BAD);
return;
}
while ((bit = find_next_bit(comp_bits, max_secs, bit + 1)) < max_secs)
gennvm_blk_set_type(dev, &rqd->ppa_list[bit], NVM_BLK_ST_BAD);
}
static void gennvm_end_io(struct nvm_rq *rqd)
{
struct nvm_tgt_instance *ins = rqd->ins;
switch (rqd->error) {
case NVM_RSP_SUCCESS:
case NVM_RSP_ERR_EMPTYPAGE:
break;
case NVM_RSP_ERR_FAILWRITE:
if (rqd->error == NVM_RSP_ERR_FAILWRITE)
gennvm_mark_blk_bad(rqd->dev, rqd);
}
ins->tt->end_io(rqd);
}