1 files changed, 39 insertions, 0 deletions
diff --git a/include/asm-s390/tape390.h b/include/asm-s390/tape390.h
new file mode 100644
index 000000000000..f1d66ba0deef
--- /dev/null
+++ b/include/asm-s390/tape390.h
@@ -0,0 +1,39 @@
+/*************************************************************************
+ *
+ * tape390.h
+ *         enables user programs to display messages on the tape device
+ *
+ *  S390 and zSeries version
+ *         Copyright (C) 2001 IBM Corporation
+ *         Author(s): Despina Papadopoulou <despina_p@de.ibm.com>
+ *
+ *************************************************************************/
+
+#ifndef _TAPE390_H
+#define _TAPE390_H
+
+#define TAPE390_DISPLAY _IOW('d', 1, struct display_struct)
+
+/*
+ * The TAPE390_DISPLAY ioctl calls the Load Display command
+ * which transfers 17 bytes of data from the channel to the subsystem:
+ *     - 1 format control byte, and
+ *     - two 8-byte messages
+ *
+ * Format control byte:
+ *   0-2: New Message Overlay
+ *     3: Alternate Messages
+ *     4: Blink Message
+ *     5: Display Low/High Message
+ *     6: Reserved
+ *     7: Automatic Load Request
+ *
+ */
+
+typedef struct display_struct {
+        char cntrl;
+        char message1[8];
+        char message2[8];
+} display_struct;
+
+#endif