diff --git a/drivers/s390/scsi/zfcp_fsf.h b/drivers/s390/scsi/zfcp_fsf.h
index 8b1a7d9..598eba9 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;