Enable metadata to be sent to the device through the metadata field on
the physical rw nvme command. When a single ppa is sent to the device, a
64-bit integer can be sent as metadata; when a ppa list is sent, a
64-bit integer list mapping to the ppa list can be used to send
metadata.
Signed-off-by: Javier González <javier@xxxxxxxxxxxx>
---
drivers/nvme/host/lightnvm.c | 1 +
include/linux/lightnvm.h | 8 ++++++--
2 files changed, 7 insertions(+), 2 deletions(-)
diff --git a/drivers/nvme/host/lightnvm.c b/drivers/nvme/host/lightnvm.c
index 4956de3..7886c2c 100644
--- a/drivers/nvme/host/lightnvm.c
+++ b/drivers/nvme/host/lightnvm.c
@@ -504,6 +504,7 @@ static inline void nvme_nvm_rqtocmd(struct request *rq, struct nvm_rq *rqd,
c->ph_rw.opcode = rqd->opcode;
c->ph_rw.nsid = cpu_to_le32(ns->ns_id);
c->ph_rw.spba = cpu_to_le64(rqd->ppa_addr.ppa);
+ c->ph_rw.metadata = cpu_to_le64(rqd->metadata);
c->ph_rw.control = cpu_to_le16(rqd->flags);
c->ph_rw.length = cpu_to_le16(rqd->nr_pages - 1);
diff --git a/include/linux/lightnvm.h b/include/linux/lightnvm.h
index 208887f..f0936e3 100644
--- a/include/linux/lightnvm.h
+++ b/include/linux/lightnvm.h
@@ -237,8 +237,12 @@ struct nvm_rq {
struct ppa_addr *ppa_list;
- void *metadata;
- dma_addr_t dma_metadata;
+ union {
+ u64 metadata;
+ dma_addr_t dma_meta_list;
+ };
+
+ u64 *meta_list;
struct completion *wait;
nvm_end_io_fn *end_io;
--
2.5.0
--
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