lightnvm: move ppa erase logic to core
A device may function in single, dual or quad plane mode. The gennvm
media manager manages this with explicit helpers. They convert a single
ppa to 1, 2 or 4 separate ppas in a ppa list. To aid implementation of
recovery and system blocks, this functionality can be moved directly
into the core.
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 8f41b24..6134339 100644
--- a/drivers/lightnvm/core.c
+++ b/drivers/lightnvm/core.c
@@ -192,6 +192,73 @@
}
EXPORT_SYMBOL(nvm_erase_blk);
+void nvm_addr_to_generic_mode(struct nvm_dev *dev, struct nvm_rq *rqd)
+{
+ int i;
+
+ if (rqd->nr_pages > 1) {
+ for (i = 0; i < rqd->nr_pages; i++)
+ rqd->ppa_list[i] = dev_to_generic_addr(dev,
+ rqd->ppa_list[i]);
+ } else {
+ rqd->ppa_addr = dev_to_generic_addr(dev, rqd->ppa_addr);
+ }
+}
+EXPORT_SYMBOL(nvm_addr_to_generic_mode);
+
+void nvm_generic_to_addr_mode(struct nvm_dev *dev, struct nvm_rq *rqd)
+{
+ int i;
+
+ if (rqd->nr_pages > 1) {
+ for (i = 0; i < rqd->nr_pages; i++)
+ rqd->ppa_list[i] = generic_to_dev_addr(dev,
+ rqd->ppa_list[i]);
+ } else {
+ rqd->ppa_addr = generic_to_dev_addr(dev, rqd->ppa_addr);
+ }
+}
+EXPORT_SYMBOL(nvm_generic_to_addr_mode);
+
+int nvm_erase_ppa(struct nvm_dev *dev, struct ppa_addr ppa)
+{
+ int plane_cnt = 0, pl_idx, ret;
+ struct nvm_rq rqd;
+
+ 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;
+
+ 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;
+ }
+ }
+
+ 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);
+
+ return ret;
+}
+EXPORT_SYMBOL(nvm_erase_ppa);
+
static int nvm_core_init(struct nvm_dev *dev)
{
struct nvm_id *id = &dev->identity;