lightnvm: implement generic path for sync I/O
Implement a generic path for sending sync I/O on LightNVM. This allows
to reuse the standard synchronous path trough blk_execute_rq(), instead
of implementing a wait_for_completion on the target side (e.g., pblk).
Signed-off-by: Javier González <javier@cnexlabs.com>
Signed-off-by: Matias Bjørling <m@bjorling.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/drivers/lightnvm/core.c b/drivers/lightnvm/core.c
index 0e5f772..fe21f4d 100644
--- a/drivers/lightnvm/core.c
+++ b/drivers/lightnvm/core.c
@@ -720,12 +720,25 @@ int nvm_submit_io(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd)
}
EXPORT_SYMBOL(nvm_submit_io);
-static void nvm_end_io_sync(struct nvm_rq *rqd)
+int nvm_submit_io_sync(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd)
{
- struct completion *waiting = rqd->private;
+ struct nvm_dev *dev = tgt_dev->parent;
+ int ret;
- complete(waiting);
+ if (!dev->ops->submit_io_sync)
+ return -ENODEV;
+
+ nvm_rq_tgt_to_dev(tgt_dev, rqd);
+
+ rqd->dev = tgt_dev;
+
+ /* In case of error, fail with right address format */
+ ret = dev->ops->submit_io_sync(dev, rqd);
+ nvm_rq_dev_to_tgt(tgt_dev, rqd);
+
+ return ret;
}
+EXPORT_SYMBOL(nvm_submit_io_sync);
int nvm_erase_sync(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *ppas,
int nr_ppas)
@@ -733,25 +746,21 @@ int nvm_erase_sync(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *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));
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);
if (ret)
return ret;
- ret = nvm_submit_io(tgt_dev, &rqd);
+ ret = nvm_submit_io_sync(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);
free_ppa_list:
nvm_free_rqd_ppalist(tgt_dev, &rqd);