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>
diff --git a/drivers/lightnvm/core.c b/drivers/lightnvm/core.c
index e6d7a98..de5db7b 100644
--- a/drivers/lightnvm/core.c
+++ b/drivers/lightnvm/core.c
@@ -251,33 +251,36 @@
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 @@
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 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;