lightnvm: enable metadata to be sent to device

Enable metadata buffer to be sent to the device through the metadata
field on the physical rw nvme command. The size of the metadata buffer
must follow dev->oob_size * # of PPAs.

Signed-off-by: Javier González <javier@cnexlabs.com>
Updated description.
Signed-off-by: Matias Bjørling <m@bjorling.me>
Signed-off-by: Jens Axboe <axboe@fb.com>

diff --git a/drivers/nvme/host/lightnvm.c b/drivers/nvme/host/lightnvm.c
index d426d95c9eaadd21521ff31ad37eb26e9d1558c3..69a47fb2b6e3d72cab742e2eb4ec6a20bb5d8527 100644 (file)
--- a/drivers/nvme/host/lightnvm.c
+++ b/drivers/nvme/host/lightnvm.c
@@ -467,6 +467,7 @@ 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->meta_list);
        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 af72ca75dced73e7ae7847a7876cef51df82ced0..678df4d4354d46183dd1f0701eb1fe9e345d0a26 100644 (file)
--- a/include/linux/lightnvm.h
+++ b/include/linux/lightnvm.h
@@ -230,8 +230,8 @@ struct nvm_rq {
 
        struct ppa_addr *ppa_list;
 
-       void *metadata;
-       dma_addr_t dma_metadata;
+       void *meta_list;
+       dma_addr_t dma_meta_list;
 
        struct completion *wait;
        nvm_end_io_fn *end_io;