lightnvm: support multiple ppas in nvm_erase_ppa

Sometimes a user want to erase multiple PPAs at the same time. Extend
nvm_erase_ppa to take multiple ppas and number of ppas to be erased.

Signed-off-by: Matias Bjørling <m@bjorling.me>
Signed-off-by: Jens Axboe <axboe@fb.com>

drivers/lightnvm/core.c

@@ -265,7 +265,7 @@ void nvm_free_rqd_ppalist(struct nvm_dev *dev, struct nvm_rq *rqd)
 }
 EXPORT_SYMBOL(nvm_free_rqd_ppalist);
 
-int nvm_erase_ppa(struct nvm_dev *dev, struct ppa_addr ppa)
+int nvm_erase_ppa(struct nvm_dev *dev, struct ppa_addr *ppas, int nr_ppas)
 {
 	struct nvm_rq rqd;
 	int ret;
@@ -275,7 +275,7 @@ int nvm_erase_ppa(struct nvm_dev *dev, struct ppa_addr ppa)
 
 	memset(&rqd, 0, sizeof(struct nvm_rq));
 
-	ret = nvm_set_rqd_ppalist(dev, &rqd, &ppa, 1);
+	ret = nvm_set_rqd_ppalist(dev, &rqd, ppas, nr_ppas);
 	if (ret)
 		return ret;
 

drivers/lightnvm/gennvm.c

@@ -396,7 +396,7 @@ static int gennvm_erase_blk(struct nvm_dev *dev, struct nvm_block *blk,
 {
 	struct ppa_addr addr = block_to_ppa(dev, blk);
 
-	return nvm_erase_ppa(dev, addr);
+	return nvm_erase_ppa(dev, &addr, 1);
 }
 
 static struct nvm_lun *gennvm_get_lun(struct nvm_dev *dev, int lunid)

include/linux/lightnvm.h

@@ -435,7 +435,7 @@ 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_ppa(struct nvm_dev *, struct ppa_addr *, int);
 extern int nvm_erase_blk(struct nvm_dev *, struct nvm_block *);
 extern void nvm_end_io(struct nvm_rq *, int);
 #else /* CONFIG_NVM */