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lightnvm: enable metadata to be sent to device

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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>
This commit is contained in:
Javier González 2016-05-06 20:03:12 +02:00 committed by Jens Axboe
parent 57682b4915
commit 003fad376b
2 changed files with 3 additions and 2 deletions
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1
drivers/nvme/host/lightnvm.c
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@ -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.opcode = rqd->opcode;
c->ph_rw.nsid = cpu_to_le32(ns->ns_id); c->ph_rw.nsid = cpu_to_le32(ns->ns_id);
c->ph_rw.spba = cpu_to_le64(rqd->ppa_addr.ppa); 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.control = cpu_to_le16(rqd->flags);
c->ph_rw.length = cpu_to_le16(rqd->nr_pages - 1); c->ph_rw.length = cpu_to_le16(rqd->nr_pages - 1);

4
include/linux/lightnvm.h
View file

@ -230,8 +230,8 @@ struct nvm_rq {
struct ppa_addr *ppa_list; struct ppa_addr *ppa_list;
void *metadata; void *meta_list;
dma_addr_t dma_metadata; dma_addr_t dma_meta_list;
struct completion *wait; struct completion *wait;
nvm_end_io_fn *end_io; nvm_end_io_fn *end_io;