linux-kernel - [PATCH 19/28] lightnvm: enable metadata to be sent to device

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Message-Id: <1462557801-24974-20-git-send-email-m@bjorling.me>
Date:	Fri,  6 May 2016 20:03:12 +0200
From:	Matias Bjørling <m@...rling.me>
To:	linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
	axboe@...com
Cc:	Javier González <javier@...xlabs.com>,
	Matias Bjørling <m@...rling.me>
Subject: [PATCH 19/28] lightnvm: enable metadata to be sent to device

From: Javier González <javier@...xlabs.com>

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@...xlabs.com>
Updated description.
Signed-off-by: Matias Bjørling <m@...rling.me>
---
 drivers/nvme/host/lightnvm.c | 1 +
 include/linux/lightnvm.h     | 4 ++--
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/nvme/host/lightnvm.c b/drivers/nvme/host/lightnvm.c
index d426d95..69a47fb 100644
--- 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 af72ca7..678df4d 100644
--- 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;
-- 
2.1.4