Allow read and write I/Os to be issued synchronous. Users include the
LightNVM core to implement system block support and similar.
Signed-off-by: Matias Bjørling <m@xxxxxxxxxxx>
---
drivers/nvme/host/lightnvm.c | 7 +++++++
include/linux/lightnvm.h | 3 +++
2 files changed, 10 insertions(+)
diff --git a/drivers/nvme/host/lightnvm.c b/drivers/nvme/host/lightnvm.c
index 15f2acb..1454e53 100644
--- a/drivers/nvme/host/lightnvm.c
+++ b/drivers/nvme/host/lightnvm.c
@@ -496,6 +496,13 @@ static int nvme_nvm_submit_io(struct nvm_dev *dev, struct nvm_rq *rqd)
rq->cmd_len = sizeof(struct nvme_nvm_command);
rq->special = (void *)0;
+ if (rqd->flags & NVM_IO_F_SYNC) {
+ int err = blk_execute_rq(q, NULL, rq, 0);
+ kfree(cmd);
+ blk_mq_free_request(rq);
+ return err;
+ }
+
rq->end_io_data = rqd;
blk_execute_rq_nowait(q, NULL, rq, 0, nvme_nvm_end_io);
diff --git a/include/linux/lightnvm.h b/include/linux/lightnvm.h
index 2fd6871..770278a 100644
--- a/include/linux/lightnvm.h
+++ b/include/linux/lightnvm.h
@@ -60,6 +60,9 @@ enum {
NVM_BLK_T_BAD = 0x1,
NVM_BLK_T_DEV = 0x2,
NVM_BLK_T_HOST = 0x4,
+
+ /* NVM Request Flags */
+ NVM_IO_F_SYNC = 0x1,
};
struct nvm_id_group {
--
2.1.4
--
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