[SCSI] zfcp: Move CFDC code to new file.

zfcp implements a device file to allow Linux guests changing the
Access Control Tables stored in the adapter. The code for the device
file has nothing to do with the other parts of the driver, so move it
to a new file and cleanup the code while doing so.

Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: Swen Schillig <swen@vnet.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

1 files changed, 12 insertions, 0 deletions

diff --git a/drivers/s390/scsi/zfcp_fsf.h b/drivers/s390/scsi/zfcp_fsf.h
index 8b1a7d9c840..598eba9baa3 100644
--- a/drivers/s390/scsi/zfcp_fsf.h
+++ b/drivers/s390/scsi/zfcp_fsf.h
@@ -22,6 +22,8 @@
 #ifndef FSF_H
 #define FSF_H
 
+#include <linux/pfn.h>
+
 #define FSF_QTCB_CURRENT_VERSION                0x00000001
 
 /* FSF commands */
@@ -258,6 +260,16 @@
 #define FSF_UNIT_ACCESS_EXCLUSIVE               0x02000000
 #define FSF_UNIT_ACCESS_OUTBOUND_TRANSFER       0x10000000
 
+/* FSF interface for CFDC */
+#define ZFCP_CFDC_MAX_SIZE              127 * 1024
+#define ZFCP_CFDC_PAGES                 PFN_UP(ZFCP_CFDC_MAX_SIZE)
+
+struct zfcp_fsf_cfdc {
+        struct scatterlist sg[ZFCP_CFDC_PAGES];
+        u32 command;
+        u32 option;
+};
+
 struct fsf_queue_designator {
         u8  cssid;
         u8  chpid;