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authorJavier González <jg@lightnvm.io>2017-04-15 20:55:37 +0200
committerJens Axboe <axboe@fb.com>2017-04-16 18:06:25 +0200
commit17912c49edfa6ab552329bf63d1b757eb874673b (patch)
treec523ceb84476721084dfb4f68cac0496c8cbb383 /drivers/lightnvm
parentnvme/lightnvm: Prevent small buffer overflow in nvme_nvm_identify (diff)
downloadlinux-17912c49edfa6ab552329bf63d1b757eb874673b.tar.xz
linux-17912c49edfa6ab552329bf63d1b757eb874673b.zip
lightnvm: submit erases using the I/O path
Until now erases have been submitted as synchronous commands through a dedicated erase function. In order to enable targets implementing asynchronous erases, refactor the erase path so that it uses the normal async I/O submission functions. If a target requires sync I/O, it can implement it internally. Also, adapt rrpc to use the new erase path. Signed-off-by: Javier González <javier@cnexlabs.com> Fixed spelling error. Signed-off-by: Matias Bjørling <matias@cnexlabs.com> Signed-off-by: Matias Bjørling <matias@cnexlabs.com> Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'drivers/lightnvm')
-rw-r--r--drivers/lightnvm/core.c54
-rw-r--r--drivers/lightnvm/rrpc.c3
2 files changed, 34 insertions, 23 deletions
diff --git a/drivers/lightnvm/core.c b/drivers/lightnvm/core.c
index 5262ba66a7a7..95105c47e082 100644
--- a/drivers/lightnvm/core.c
+++ b/drivers/lightnvm/core.c
@@ -590,11 +590,11 @@ int nvm_set_tgt_bb_tbl(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *ppas,
memset(&rqd, 0, sizeof(struct nvm_rq));
- nvm_set_rqd_ppalist(dev, &rqd, ppas, nr_ppas, 1);
+ nvm_set_rqd_ppalist(tgt_dev, &rqd, ppas, nr_ppas, 1);
nvm_rq_tgt_to_dev(tgt_dev, &rqd);
ret = dev->ops->set_bb_tbl(dev, &rqd.ppa_addr, rqd.nr_ppas, type);
- nvm_free_rqd_ppalist(dev, &rqd);
+ nvm_free_rqd_ppalist(tgt_dev, &rqd);
if (ret) {
pr_err("nvm: failed bb mark\n");
return -EINVAL;
@@ -626,34 +626,45 @@ int nvm_submit_io(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd)
}
EXPORT_SYMBOL(nvm_submit_io);
-int nvm_erase_blk(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *ppas, int flags)
+static void nvm_end_io_sync(struct nvm_rq *rqd)
{
- struct nvm_dev *dev = tgt_dev->parent;
- struct nvm_rq rqd;
- int ret;
+ struct completion *waiting = rqd->private;
- if (!dev->ops->erase_block)
- return 0;
+ complete(waiting);
+}
- nvm_map_to_dev(tgt_dev, ppas);
+int nvm_erase_sync(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *ppas,
+ int nr_ppas)
+{
+ struct nvm_geo *geo = &tgt_dev->geo;
+ struct nvm_rq rqd;
+ int ret;
+ DECLARE_COMPLETION_ONSTACK(wait);
memset(&rqd, 0, sizeof(struct nvm_rq));
- ret = nvm_set_rqd_ppalist(dev, &rqd, ppas, 1, 1);
+ rqd.opcode = NVM_OP_ERASE;
+ rqd.end_io = nvm_end_io_sync;
+ rqd.private = &wait;
+ rqd.flags = geo->plane_mode >> 1;
+
+ ret = nvm_set_rqd_ppalist(tgt_dev, &rqd, ppas, nr_ppas, 1);
if (ret)
return ret;
- nvm_rq_tgt_to_dev(tgt_dev, &rqd);
-
- rqd.flags = flags;
-
- ret = dev->ops->erase_block(dev, &rqd);
+ ret = nvm_submit_io(tgt_dev, &rqd);
+ if (ret) {
+ pr_err("rrpr: erase I/O submission failed: %d\n", ret);
+ goto free_ppa_list;
+ }
+ wait_for_completion_io(&wait);
- nvm_free_rqd_ppalist(dev, &rqd);
+free_ppa_list:
+ nvm_free_rqd_ppalist(tgt_dev, &rqd);
return ret;
}
-EXPORT_SYMBOL(nvm_erase_blk);
+EXPORT_SYMBOL(nvm_erase_sync);
int nvm_get_l2p_tbl(struct nvm_tgt_dev *tgt_dev, u64 slba, u32 nlb,
nvm_l2p_update_fn *update_l2p, void *priv)
@@ -732,10 +743,11 @@ void nvm_put_area(struct nvm_tgt_dev *tgt_dev, sector_t begin)
}
EXPORT_SYMBOL(nvm_put_area);
-int nvm_set_rqd_ppalist(struct nvm_dev *dev, struct nvm_rq *rqd,
+int nvm_set_rqd_ppalist(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd,
const struct ppa_addr *ppas, int nr_ppas, int vblk)
{
- struct nvm_geo *geo = &dev->geo;
+ struct nvm_dev *dev = tgt_dev->parent;
+ struct nvm_geo *geo = &tgt_dev->geo;
int i, plane_cnt, pl_idx;
struct ppa_addr ppa;
@@ -773,12 +785,12 @@ int nvm_set_rqd_ppalist(struct nvm_dev *dev, struct nvm_rq *rqd,
}
EXPORT_SYMBOL(nvm_set_rqd_ppalist);
-void nvm_free_rqd_ppalist(struct nvm_dev *dev, struct nvm_rq *rqd)
+void nvm_free_rqd_ppalist(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd)
{
if (!rqd->ppa_list)
return;
- nvm_dev_dma_free(dev, rqd->ppa_list, rqd->dma_ppa_list);
+ nvm_dev_dma_free(tgt_dev->parent, rqd->ppa_list, rqd->dma_ppa_list);
}
EXPORT_SYMBOL(nvm_free_rqd_ppalist);
diff --git a/drivers/lightnvm/rrpc.c b/drivers/lightnvm/rrpc.c
index e68efbcf1188..4e4c2997337c 100644
--- a/drivers/lightnvm/rrpc.c
+++ b/drivers/lightnvm/rrpc.c
@@ -414,7 +414,6 @@ static void rrpc_block_gc(struct work_struct *work)
struct rrpc *rrpc = gcb->rrpc;
struct rrpc_block *rblk = gcb->rblk;
struct rrpc_lun *rlun = rblk->rlun;
- struct nvm_tgt_dev *dev = rrpc->dev;
struct ppa_addr ppa;
mempool_free(gcb, rrpc->gcb_pool);
@@ -430,7 +429,7 @@ static void rrpc_block_gc(struct work_struct *work)
ppa.g.lun = rlun->bppa.g.lun;
ppa.g.blk = rblk->id;
- if (nvm_erase_blk(dev, &ppa, 0))
+ if (nvm_erase_sync(rrpc->dev, &ppa, 1))
goto put_back;
rrpc_put_blk(rrpc, rblk);