linux-kernel - [PATCH 3/5] scsi: ufs: Add Kconfig for UFS HC driver crypto support

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Message-ID: <9baaf314-e9de-a078-1085-9c81b3421d42@synopsys.com>
Date:   Mon, 28 May 2018 14:29:07 +0100
From:   Ladvine D Almeida <Ladvine.DAlmeida@...opsys.com>
To:     "Vinayak Holikatti <vinholikatti@...il.com>; \"James E.J. Bottomley\" 
        <jejb@...ux.vnet.ibm.com>; \"Martin K. Petersen\"" 
        <martin.petersen@...cle.com>, <linux-kernel@...r.kernel.org>,
        "linux-scsi@...r.kernel.org; Manjunath M Bettegowda
        <manjumb@...opsys.com>; Prabu Thangamuthu <prabut@...opsys.com>; Tejas
        Joglekar <joglekar@...opsys.com>; Joao Pinto" 
        <Joao.Pinto@...opsys.com>
Subject: [PATCH 3/5] scsi: ufs: Add Kconfig for UFS HC driver crypto support


This patch adds the Kconfig for enabling crypto support for
UFS Host Controller driver. It also adds Makefile changes
for building crypto support based on crypto Kconfig selection.

Signed-off-by: Ladvine D Almeida <ladvine@...opsys.com>
---
 drivers/scsi/ufs/Kconfig  | 15 +++++++++++++++
 drivers/scsi/ufs/Makefile |  6 +++++-
 2 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/drivers/scsi/ufs/Kconfig b/drivers/scsi/ufs/Kconfig
index e27b4d4..0134672 100644
--- a/drivers/scsi/ufs/Kconfig
+++ b/drivers/scsi/ufs/Kconfig
@@ -50,6 +50,21 @@ config SCSI_UFSHCD
 	  However, do not compile this as a module if your root file system
 	  (the one containing the directory /) is located on a UFS device.
 
+config SCSI_UFSHCD_INLINE_ENCRYPTION
+	bool "Universal Flash Storage Controller Driver crypto support"
+	depends on SCSI_UFSHCD
+	default n
+	select BLK_DEV_INLINE_ENCRYPTION if SCSI_UFSHCD_INLINE_ENCRYPTION
+	help
+	This enables the Inline Encryption feature of the UFS Host
+	Controller driver. Once the capability is detected in hardware,
+	it will be made available for the user through Linux Kernel
+	Cryptography Framework(LKCF).
+
+	  If you have a controller with this capability, say Y.
+
+	  If unsure, say N.
+
 config SCSI_UFSHCD_PCI
 	tristate "PCI bus based UFS Controller support"
 	depends on SCSI_UFSHCD && PCI
diff --git a/drivers/scsi/ufs/Makefile b/drivers/scsi/ufs/Makefile
index 918f579..ab84bec 100644
--- a/drivers/scsi/ufs/Makefile
+++ b/drivers/scsi/ufs/Makefile
@@ -4,6 +4,10 @@ obj-$(CONFIG_SCSI_UFS_DWC_TC_PCI) += tc-dwc-g210-pci.o ufshcd-dwc.o tc-dwc-g210.
 obj-$(CONFIG_SCSI_UFS_DWC_TC_PLATFORM) += tc-dwc-g210-pltfrm.o ufshcd-dwc.o tc-dwc-g210.o
 obj-$(CONFIG_SCSI_UFS_QCOM) += ufs-qcom.o
 obj-$(CONFIG_SCSI_UFSHCD) += ufshcd-core.o
-ufshcd-core-objs := ufshcd.o ufs-sysfs.o
+ifdef CONFIG_SCSI_UFSHCD_INLINE_ENCRYPTION
+        ufshcd-core-objs := ufshcd.o ufs-sysfs.o ufshcd-crypto.o
+else
+        ufshcd-core-objs := ufshcd.o ufs-sysfs.o
+endif
 obj-$(CONFIG_SCSI_UFSHCD_PCI) += ufshcd-pci.o
 obj-$(CONFIG_SCSI_UFSHCD_PLATFORM) += ufshcd-pltfrm.o
-- 
2.7.4