[SCSI] zfcp: Introduce experimental support for DIF/DIX

Introduce support for DIF/DIX in zfcp: Report the capabilities for the
Scsi_host, map the protection data when issuing I/O requests and
handle the new error codes. Also add the fsf data_direction field to
the hba trace, it is useful information for debugging in that area.
This is an EXPERIMENTAL feature for now.

Signed-off-by: Felix Beck <felix.beck@de.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/scsi/Kconfig b/drivers/scsi/Kconfig
index 75f2336807cb..158284f05732 100644
--- a/drivers/scsi/Kconfig
+++ b/drivers/scsi/Kconfig
@@ -1847,6 +1847,10 @@ config ZFCP
           called zfcp. If you want to compile it as a module, say M here
           and read <file:Documentation/kbuild/modules.txt>.
 
+config ZFCP_DIF
+        tristate "T10 DIF/DIX support for the zfcp driver (EXPERIMENTAL)"
+        depends on ZFCP && EXPERIMENTAL
+
 config SCSI_PMCRAID
         tristate "PMC SIERRA Linux MaxRAID adapter support"
         depends on PCI && SCSI