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authorMichael Holzheu <holzheu@de.ibm.com>2007-02-05 15:18:26 -0500
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2007-02-05 15:18:26 -0500
commitcced1dd42ebcebc7fa7f02fe487e48aa71752401 (patch)
tree989ef44c23b900309f070184b8bf3412d5b98dbf /include/asm-s390
parentfe355b7f1c7400cbb71762a1237461be03f88265 (diff)
[S390] Add crypto support for 3592 tape devices
3592 tape devices are able to write data encrpyted on tape mediums. This z/Linux device driver support includes the following functions: * ioctl to switch on/off encryption * ioctl to query encryption status of drive * ioctls to set and query key encrypting keys (kekls) * long busy interrupt handling Signed-off-by: Michael Holzheu <holzheu@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'include/asm-s390')
-rw-r--r--include/asm-s390/tape390.h72
1 files changed, 68 insertions, 4 deletions
diff --git a/include/asm-s390/tape390.h b/include/asm-s390/tape390.h
index f1d66ba0deef..884fba48f1ff 100644
--- a/include/asm-s390/tape390.h
+++ b/include/asm-s390/tape390.h
@@ -1,11 +1,11 @@
1/************************************************************************* 1/*************************************************************************
2 * 2 *
3 * tape390.h 3 * tape390.h
4 * enables user programs to display messages on the tape device 4 * enables user programs to display messages and control encryption
5 * on s390 tape devices
5 * 6 *
6 * S390 and zSeries version 7 * Copyright IBM Corp. 2001,2006
7 * Copyright (C) 2001 IBM Corporation 8 * Author(s): Michael Holzheu <holzheu@de.ibm.com>
8 * Author(s): Despina Papadopoulou <despina_p@de.ibm.com>
9 * 9 *
10 *************************************************************************/ 10 *************************************************************************/
11 11
@@ -36,4 +36,68 @@ typedef struct display_struct {
36 char message2[8]; 36 char message2[8];
37} display_struct; 37} display_struct;
38 38
39/*
40 * Tape encryption support
41 */
42
43struct tape390_crypt_info {
44 char capability;
45 char status;
46 char medium_status;
47} __attribute__ ((packed));
48
49
50/* Macros for "capable" field */
51#define TAPE390_CRYPT_SUPPORTED_MASK 0x01
52#define TAPE390_CRYPT_SUPPORTED(x) \
53 ((x.capability & TAPE390_CRYPT_SUPPORTED_MASK))
54
55/* Macros for "status" field */
56#define TAPE390_CRYPT_ON_MASK 0x01
57#define TAPE390_CRYPT_ON(x) (((x.status) & TAPE390_CRYPT_ON_MASK))
58
59/* Macros for "medium status" field */
60#define TAPE390_MEDIUM_LOADED_MASK 0x01
61#define TAPE390_MEDIUM_ENCRYPTED_MASK 0x02
62#define TAPE390_MEDIUM_ENCRYPTED(x) \
63 (((x.medium_status) & TAPE390_MEDIUM_ENCRYPTED_MASK))
64#define TAPE390_MEDIUM_LOADED(x) \
65 (((x.medium_status) & TAPE390_MEDIUM_LOADED_MASK))
66
67/*
68 * The TAPE390_CRYPT_SET ioctl is used to switch on/off encryption.
69 * The "encryption_capable" and "tape_status" fields are ignored for this ioctl!
70 */
71#define TAPE390_CRYPT_SET _IOW('d', 2, struct tape390_crypt_info)
72
73/*
74 * The TAPE390_CRYPT_QUERY ioctl is used to query the encryption state.
75 */
76#define TAPE390_CRYPT_QUERY _IOR('d', 3, struct tape390_crypt_info)
77
78/* Values for "kekl1/2_type" and "kekl1/2_type_on_tape" fields */
79#define TAPE390_KEKL_TYPE_NONE 0
80#define TAPE390_KEKL_TYPE_LABEL 1
81#define TAPE390_KEKL_TYPE_HASH 2
82
83struct tape390_kekl {
84 unsigned char type;
85 unsigned char type_on_tape;
86 char label[65];
87} __attribute__ ((packed));
88
89struct tape390_kekl_pair {
90 struct tape390_kekl kekl[2];
91} __attribute__ ((packed));
92
93/*
94 * The TAPE390_KEKL_SET ioctl is used to set Key Encrypting Key labels.
95 */
96#define TAPE390_KEKL_SET _IOW('d', 4, struct tape390_kekl_pair)
97
98/*
99 * The TAPE390_KEKL_QUERY ioctl is used to query Key Encrypting Key labels.
100 */
101#define TAPE390_KEKL_QUERY _IOR('d', 5, struct tape390_kekl_pair)
102
39#endif 103#endif