linux-kernel - [PATCH 2/7] lightnvm: add mccap support

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Message-Id: <1452276877-390-2-git-send-email-m@bjorling.me>
Date:	Fri,  8 Jan 2016 19:14:32 +0100
From:	Matias Bjørling <m@...rling.me>
To:	linux-block@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:	Matias Bjørling <m@...rling.me>
Subject: [PATCH 2/7] lightnvm: add mccap support

Some flash media has extended capabilities, such as programming SLC
pages on MLC/TLC flash, erase/program suspend, scramble and encryption.
MCCAP is introduced to detect support for these capabilities in the
command set.

Signed-off-by: Matias Bjørling <m@...rling.me>
---
 drivers/lightnvm/core.c  | 1 +
 include/linux/lightnvm.h | 7 +++++++
 2 files changed, 8 insertions(+)

diff --git a/drivers/lightnvm/core.c b/drivers/lightnvm/core.c
index e5e3963..5199c12 100644
--- a/drivers/lightnvm/core.c
+++ b/drivers/lightnvm/core.c
@@ -376,6 +376,7 @@ static int nvm_core_init(struct nvm_dev *dev)
 	dev->sec_size = grp->csecs;
 	dev->oob_size = grp->sos;
 	dev->sec_per_pg = grp->fpg_sz / grp->csecs;
+	dev->mccap = grp->mccap;
 	memcpy(&dev->ppaf, &id->ppaf, sizeof(struct nvm_addr_format));
 
 	dev->plane_mode = NVM_PLANE_SINGLE;
diff --git a/include/linux/lightnvm.h b/include/linux/lightnvm.h
index aa35907..b90d283 100644
--- a/include/linux/lightnvm.h
+++ b/include/linux/lightnvm.h
@@ -61,6 +61,12 @@ enum {
 	NVM_BLK_T_GRWN_BAD	= 0x2,
 	NVM_BLK_T_DEV		= 0x4,
 	NVM_BLK_T_HOST		= 0x8,
+
+	/* Memory capabilities */
+	NVM_ID_CAP_SLC		= 0x1,
+	NVM_ID_CAP_CMD_SUSPEND	= 0x2,
+	NVM_ID_CAP_SCRAMBLE	= 0x4,
+	NVM_ID_CAP_ENCRYPT	= 0x8,
 };
 
 struct nvm_id_group {
@@ -278,6 +284,7 @@ struct nvm_dev {
 	int blks_per_lun;
 	int sec_size;
 	int oob_size;
+	int mccap;
 	struct nvm_addr_format ppaf;
 
 	/* Calculated/Cached values. These do not reflect the actual usable
-- 
2.1.4