linux-kernel - [PATCH 06/20] lightnvm: add shorten OCSSD version in geo

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Message-Id: <1519205218-26994-7-git-send-email-javier@cnexlabs.com>
Date:   Wed, 21 Feb 2018 10:26:44 +0100
From:   "Javier González" <jg@...htnvm.io>
To:     mb@...htnvm.io
Cc:     linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-nvme@...ts.infradead.org,
        Javier González <javier@...xlabs.com>
Subject: [PATCH 06/20] lightnvm: add shorten OCSSD version in geo

Create a shorten version to use in the generic geometry.

Signed-off-by: Javier González <javier@...xlabs.com>
---
 drivers/nvme/host/lightnvm.c | 6 ++++++
 include/linux/lightnvm.h     | 8 ++++++++
 2 files changed, 14 insertions(+)

diff --git a/drivers/nvme/host/lightnvm.c b/drivers/nvme/host/lightnvm.c
index f22331e61cef..bd97672e0b4f 100644
--- a/drivers/nvme/host/lightnvm.c
+++ b/drivers/nvme/host/lightnvm.c
@@ -299,6 +299,9 @@ static int nvme_nvm_setup_12(struct nvme_nvm_id12 *id,
 	dev_geo->major_ver_id = id->ver_id;
 	dev_geo->minor_ver_id = 2;
 
+	/* Set compacted version for upper layers */
+	dev_geo->c.version = NVM_OCSSD_SPEC_12;
+
 	dev_geo->num_ch = src->num_ch;
 	dev_geo->num_lun = src->num_lun;
 	dev_geo->all_luns = dev_geo->num_ch * dev_geo->num_lun;
@@ -381,6 +384,9 @@ static int nvme_nvm_setup_20(struct nvme_nvm_id20 *id,
 	dev_geo->major_ver_id = id->mjr;
 	dev_geo->minor_ver_id = id->mnr;
 
+	/* Set compacted version for upper layers */
+	dev_geo->c.version = NVM_OCSSD_SPEC_20;
+
 	if (!(dev_geo->major_ver_id == 2 && dev_geo->minor_ver_id == 0)) {
 		pr_err("nvm: OCSSD version not supported (v%d.%d)\n",
 				dev_geo->major_ver_id, dev_geo->minor_ver_id);
diff --git a/include/linux/lightnvm.h b/include/linux/lightnvm.h
index 28d429e0a1c9..02f1fd617781 100644
--- a/include/linux/lightnvm.h
+++ b/include/linux/lightnvm.h
@@ -23,6 +23,11 @@ enum {
 #define NVM_LUN_BITS (8)
 #define NVM_CH_BITS  (7)
 
+enum {
+	NVM_OCSSD_SPEC_12 = 12,
+	NVM_OCSSD_SPEC_20 = 20,
+};
+
 struct ppa_addr {
 	/* Generic structure for all addresses */
 	union {
@@ -197,6 +202,9 @@ struct nvm_addr_format {
 
 /* Device common geometry */
 struct nvm_common_geo {
+	/* kernel short version */
+	u8	version;
+
 	/* chunk geometry */
 	u32	num_chk;	/* chunks per lun */
 	u32	clba;		/* sectors per chunk */
-- 
2.7.4