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lightnvm: make nvm_set_rqd_ppalist() aware of vblks 

A virtual block enables a block to identify multiple physical blocks.
This is useful for metadata where a device media supports multiple
planes. In that case, a block, with multiple planes can be managed
as a single vblk. Reducing the metadata required by one forth.

nvm_set_rqd_ppalist() takes care of expanding a ppa_list with vblks
automatically. However, for some use-cases, where only a single physical
block is required, the ppa_list should not be expanded.

Therefore, add a vblk parameter to nvm_set_rqd_ppalist(), and only
expand the ppa_list if vblk is set.

Signed-off-by: Matias Bjørling <m@bjorling.me>
Signed-off-by: Jens Axboe <axboe@fb.com>
steinar/wifi_calib_4_9_kernel
Matias Bjørling 2016-05-06 20:03:07 +02:00 committed by Jens Axboe
parent 6659d4d80c
commit 5ebc7d9fe1
3 changed files with 19 additions and 16 deletions
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31
drivers/lightnvm/core.c
View File

@ -251,33 +251,36 @@ void nvm_generic_to_addr_mode(struct nvm_dev *dev, struct nvm_rq *rqd)
EXPORT_SYMBOL(nvm_generic_to_addr_mode);
int nvm_set_rqd_ppalist(struct nvm_dev *dev, struct nvm_rq *rqd,
struct ppa_addr *ppas, int nr_ppas)
struct ppa_addr *ppas, int nr_ppas, int vblk)
{
int i, plane_cnt, pl_idx;
if (dev->plane_mode == NVM_PLANE_SINGLE && nr_ppas == 1) {
rqd->nr_pages = 1;
if ((!vblk || dev->plane_mode == NVM_PLANE_SINGLE) && nr_ppas == 1) {
rqd->nr_pages = nr_ppas;
rqd->ppa_addr = ppas[0];
return 0;
}
plane_cnt = dev->plane_mode;
rqd->nr_pages = plane_cnt * nr_ppas;
if (dev->ops->max_phys_sect < rqd->nr_pages)
return -EINVAL;
rqd->nr_pages = nr_ppas;
rqd->ppa_list = nvm_dev_dma_alloc(dev, GFP_KERNEL, &rqd->dma_ppa_list);
if (!rqd->ppa_list) {
pr_err("nvm: failed to allocate dma memory\n");
return -ENOMEM;
}
for (pl_idx = 0; pl_idx < plane_cnt; pl_idx++) {
if (!vblk) {
for (i = 0; i < nr_ppas; i++)
rqd->ppa_list[i] = ppas[i];
} else {
plane_cnt = dev->plane_mode;
rqd->nr_pages *= plane_cnt;
for (i = 0; i < nr_ppas; i++) {
ppas[i].g.pl = pl_idx;
rqd->ppa_list[(pl_idx * nr_ppas) + i] = ppas[i];
for (pl_idx = 0; pl_idx < plane_cnt; pl_idx++) {
ppas[i].g.pl = pl_idx;
rqd->ppa_list[(pl_idx * nr_ppas) + i] = ppas[i];
}
}
}
@ -304,7 +307,7 @@ int nvm_erase_ppa(struct nvm_dev *dev, struct ppa_addr *ppas, int nr_ppas)
memset(&rqd, 0, sizeof(struct nvm_rq));
ret = nvm_set_rqd_ppalist(dev, &rqd, ppas, nr_ppas);
ret = nvm_set_rqd_ppalist(dev, &rqd, ppas, nr_ppas, 1);
if (ret)
return ret;
@ -420,7 +423,7 @@ int nvm_submit_ppa(struct nvm_dev *dev, struct ppa_addr *ppa, int nr_ppas,
int ret;
memset(&rqd, 0, sizeof(struct nvm_rq));
ret = nvm_set_rqd_ppalist(dev, &rqd, ppa, nr_ppas);
ret = nvm_set_rqd_ppalist(dev, &rqd, ppa, nr_ppas, 1);
if (ret)
return ret;

2
drivers/lightnvm/sysblk.c
View File

@ -277,7 +277,7 @@ static int nvm_set_bb_tbl(struct nvm_dev *dev, struct sysblk_scan *s, int type)
memset(&rqd, 0, sizeof(struct nvm_rq));
nvm_set_rqd_ppalist(dev, &rqd, s->ppas, s->nr_ppas);
nvm_set_rqd_ppalist(dev, &rqd, s->ppas, s->nr_ppas, 1);
nvm_generic_to_addr_mode(dev, &rqd);
ret = dev->ops->set_bb_tbl(dev, &rqd, type);

2
include/linux/lightnvm.h
View File

@ -526,7 +526,7 @@ extern int nvm_submit_io(struct nvm_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 *,
struct ppa_addr *, int);
struct ppa_addr *, int, int);
extern void nvm_free_rqd_ppalist(struct nvm_dev *, struct nvm_rq *);
extern int nvm_erase_ppa(struct nvm_dev *, struct ppa_addr *, int);
extern int nvm_erase_blk(struct nvm_dev *, struct nvm_block *);