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@xxxxxxxxxxx>
---
drivers/lightnvm/core.c | 71 ++++++++++++++++++++++++++++++++++--------------
include/linux/lightnvm.h | 3 ++
2 files changed, 53 insertions(+), 21 deletions(-)
diff --git a/drivers/lightnvm/core.c b/drivers/lightnvm/core.c
index 6134339..081b0f5 100644
--- a/drivers/lightnvm/core.c
+++ b/drivers/lightnvm/core.c
@@ -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;
}
diff --git a/include/linux/lightnvm.h b/include/linux/lightnvm.h
index c228dbc..2fd6871 100644
--- a/include/linux/lightnvm.h
+++ b/include/linux/lightnvm.h
@@ -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 */
--
2.1.4
--
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