block: Add Sed-opal library

This patch implements the necessary logic to bring an Opal
enabled drive out of a factory-enabled into a working
Opal state.

This patch set also enables logic to save a password to
be replayed during a resume from suspend.

Signed-off-by: Scott Bauer <scott.bauer@intel.com>
Signed-off-by: Rafael Antognolli <Rafael.Antognolli@intel.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>

MAINTAINERS

@@ -11075,6 +11075,17 @@ L:	linux-mmc@vger.kernel.org
 S:	Maintained
 F:	drivers/mmc/host/sdhci-spear.c
 
+SECURE ENCRYPTING DEVICE (SED) OPAL DRIVER
+M:	Scott Bauer <scott.bauer@intel.com>
+M:	Jonathan Derrick <jonathan.derrick@intel.com>
+M:	Rafael Antognolli <rafael.antognolli@intel.com>
+L:	linux-nvme@lists.infradead.org
+S:	Supported
+F:	block/sed*
+F:	block/opal_proto.h
+F:	include/linux/sed*
+F:	include/uapi/linux/sed*
+
 SECURITY SUBSYSTEM
 M:	James Morris <james.l.morris@oracle.com>
 M:	"Serge E. Hallyn" <serge@hallyn.com>

block/Kconfig

@@ -159,6 +159,13 @@ config BLK_DEBUG_FS
 	Unless you are building a kernel for a tiny system, you should
 	say Y here.
 
+config BLK_SED_OPAL
+	bool "Logic for interfacing with Opal enabled SEDs"
+	---help---
+	Builds Logic for interfacing with Opal enabled controllers.
+	Enabling this option enables users to setup/unlock/lock
+	Locking ranges for SED devices using the Opal protocol.
+
 menu "Partition Types"
 
 source "block/partitions/Kconfig"

block/Makefile

@@ -27,3 +27,4 @@ obj-$(CONFIG_BLK_MQ_PCI)	+= blk-mq-pci.o
 obj-$(CONFIG_BLK_DEV_ZONED)	+= blk-zoned.o
 obj-$(CONFIG_BLK_WBT)		+= blk-wbt.o
 obj-$(CONFIG_BLK_DEBUG_FS)	+= blk-mq-debugfs.o
+obj-$(CONFIG_BLK_SED_OPAL)	+= sed-opal.o