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-rw-r--r--arch/s390/include/asm/tape390.h103
1 files changed, 103 insertions, 0 deletions
diff --git a/arch/s390/include/asm/tape390.h b/arch/s390/include/asm/tape390.h
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+++ b/arch/s390/include/asm/tape390.h
@@ -0,0 +1,103 @@
+/*************************************************************************
+ *
+ * tape390.h
+ * enables user programs to display messages and control encryption
+ * on s390 tape devices
+ *
+ * Copyright IBM Corp. 2001,2006
+ * Author(s): Michael Holzheu <holzheu@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;
+
+/*
+ * Tape encryption support
+ */
+
+struct tape390_crypt_info {
+ char capability;
+ char status;
+ char medium_status;
+} __attribute__ ((packed));
+
+
+/* Macros for "capable" field */
+#define TAPE390_CRYPT_SUPPORTED_MASK 0x01
+#define TAPE390_CRYPT_SUPPORTED(x) \
+ ((x.capability & TAPE390_CRYPT_SUPPORTED_MASK))
+
+/* Macros for "status" field */
+#define TAPE390_CRYPT_ON_MASK 0x01
+#define TAPE390_CRYPT_ON(x) (((x.status) & TAPE390_CRYPT_ON_MASK))
+
+/* Macros for "medium status" field */
+#define TAPE390_MEDIUM_LOADED_MASK 0x01
+#define TAPE390_MEDIUM_ENCRYPTED_MASK 0x02
+#define TAPE390_MEDIUM_ENCRYPTED(x) \
+ (((x.medium_status) & TAPE390_MEDIUM_ENCRYPTED_MASK))
+#define TAPE390_MEDIUM_LOADED(x) \
+ (((x.medium_status) & TAPE390_MEDIUM_LOADED_MASK))
+
+/*
+ * The TAPE390_CRYPT_SET ioctl is used to switch on/off encryption.
+ * The "encryption_capable" and "tape_status" fields are ignored for this ioctl!
+ */
+#define TAPE390_CRYPT_SET _IOW('d', 2, struct tape390_crypt_info)
+
+/*
+ * The TAPE390_CRYPT_QUERY ioctl is used to query the encryption state.
+ */
+#define TAPE390_CRYPT_QUERY _IOR('d', 3, struct tape390_crypt_info)
+
+/* Values for "kekl1/2_type" and "kekl1/2_type_on_tape" fields */
+#define TAPE390_KEKL_TYPE_NONE 0
+#define TAPE390_KEKL_TYPE_LABEL 1
+#define TAPE390_KEKL_TYPE_HASH 2
+
+struct tape390_kekl {
+ unsigned char type;
+ unsigned char type_on_tape;
+ char label[65];
+} __attribute__ ((packed));
+
+struct tape390_kekl_pair {
+ struct tape390_kekl kekl[2];
+} __attribute__ ((packed));
+
+/*
+ * The TAPE390_KEKL_SET ioctl is used to set Key Encrypting Key labels.
+ */
+#define TAPE390_KEKL_SET _IOW('d', 4, struct tape390_kekl_pair)
+
+/*
+ * The TAPE390_KEKL_QUERY ioctl is used to query Key Encrypting Key labels.
+ */
+#define TAPE390_KEKL_QUERY _IOR('d', 5, struct tape390_kekl_pair)
+
+#endif

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