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lightnvm: refactor rqd ppa list into set/free

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A device may be driven in single, double or quad plane mode. In that
case, the rqd must have either one, two, or four PPAs set for a single
PPA sent to the device. Refactor this logic into their own
functions to be shared by program/erase/read in the core.

Signed-off-by: Matias Bjørling <m@bjorling.me>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Matias Bjørling 2016-01-12 07:49:20 +01:00 committed by Jens Axboe
parent 069368e918
commit abd805ec9f
2 changed files with 53 additions and 21 deletions
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71
drivers/lightnvm/core.c
View File

@ -220,40 +220,69 @@ 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)
{
int i, plane_cnt, pl_idx;
if (dev->plane_mode == NVM_PLANE_SINGLE && nr_ppas == 1) {
rqd->nr_pages = 1;
rqd->ppa_addr = ppas[0];
return 0;
}
plane_cnt = (1 << dev->plane_mode);
rqd->nr_pages = plane_cnt * nr_ppas;
if (dev->ops->max_phys_sect < rqd->nr_pages)
return -EINVAL;
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 (i = 0; i < nr_ppas; i++) {
for (pl_idx = 0; pl_idx < plane_cnt; pl_idx++) {
ppas[i].g.pl = pl_idx;
rqd->ppa_list[(i * plane_cnt) + pl_idx] = ppas[i];
}
}
return 0;
}
EXPORT_SYMBOL(nvm_set_rqd_ppalist);
void nvm_free_rqd_ppalist(struct nvm_dev *dev, struct nvm_rq *rqd)
{
if (!rqd->ppa_list)
return;
nvm_dev_dma_free(dev, rqd->ppa_list, rqd->dma_ppa_list);
}
EXPORT_SYMBOL(nvm_free_rqd_ppalist);
int nvm_erase_ppa(struct nvm_dev *dev, struct ppa_addr ppa)
{
int plane_cnt = 0, pl_idx, ret;
struct nvm_rq rqd;
int ret;
if (!dev->ops->erase_block)
return 0;
if (dev->plane_mode == NVM_PLANE_SINGLE) {
rqd.nr_pages = 1;
rqd.ppa_addr = ppa;
} else {
plane_cnt = (1 << dev->plane_mode);
rqd.nr_pages = plane_cnt;
memset(&rqd, 0, sizeof(struct nvm_rq));
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++) {
ppa.g.pl = pl_idx;
rqd.ppa_list[pl_idx] = ppa;
}
}
ret = nvm_set_rqd_ppalist(dev, &rqd, &ppa, 1);
if (ret)
return ret;
nvm_generic_to_addr_mode(dev, &rqd);
ret = dev->ops->erase_block(dev, &rqd);
if (plane_cnt)
nvm_dev_dma_free(dev, rqd.ppa_list, rqd.dma_ppa_list);
nvm_free_rqd_ppalist(dev, &rqd);
return ret;
}

3
include/linux/lightnvm.h
View File

@ -429,6 +429,9 @@ extern void nvm_unregister(char *);
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);
extern void nvm_free_rqd_ppalist(struct nvm_dev *, struct nvm_rq *);
extern int nvm_erase_ppa(struct nvm_dev *, struct ppa_addr);
extern int nvm_erase_blk(struct nvm_dev *, struct nvm_block *);
#else /* CONFIG_NVM */