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lightnvm: transform target get/set bad block

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Since targets are given a virtual target device, it is necessary to
translate all communication between targets and the backend device.
Implement the translation layer for get/set bad block table.

Signed-off-by: Javier González <javier@cnexlabs.com>
Signed-off-by: Matias Bjørling <m@bjorling.me>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Javier González
2016-11-28 22:39:14 +01:00
committed by Jens Axboe
parent da2d7cb828
commit 333ba053d1
4 changed files with 85 additions and 11 deletions
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19
drivers/lightnvm/gennvm.c
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@@ -482,12 +482,6 @@ static void gen_unregister(struct nvm_dev *dev)
module_put(THIS_MODULE);
}
enum {
TRANS_TGT_TO_DEV = 0x0,
TRANS_DEV_TO_TGT = 0x1,
};
static int gen_map_to_dev(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *p)
{
struct gen_dev_map *dev_map = tgt_dev->map;
@@ -584,6 +578,18 @@ static int gen_erase_blk(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *p,
return nvm_erase_ppa(tgt_dev->parent, p, 1, flags);
}
static struct ppa_addr gen_trans_ppa(struct nvm_tgt_dev *tgt_dev,
struct ppa_addr p, int direction)
{
gen_trans_fn *f;
struct ppa_addr ppa = p;
f = (direction == TRANS_TGT_TO_DEV) ? gen_map_to_dev : gen_map_to_tgt;
f(tgt_dev, &ppa);
return ppa;
}
static void gen_part_to_tgt(struct nvm_dev *dev, sector_t *entries,
int len)
{
@@ -631,6 +637,7 @@ static struct nvmm_type gen = {
.get_area = gen_get_area,
.put_area = gen_put_area,
.trans_ppa = gen_trans_ppa,
.part_to_tgt = gen_part_to_tgt,
};