Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1/*
2 * Copyright (C) 2004,2007,2008 IBM Corporation
3 *
4 * Authors:
5 * Leendert van Doorn <leendert@watson.ibm.com>
6 * Dave Safford <safford@watson.ibm.com>
7 * Reiner Sailer <sailer@watson.ibm.com>
8 * Kylene Hall <kjhall@us.ibm.com>
9 * Debora Velarde <dvelarde@us.ibm.com>
10 *
11 * Maintained by: <tpmdd_devel@lists.sourceforge.net>
12 *
13 * Device driver for TCG/TCPA TPM (trusted platform module).
14 * Specifications at www.trustedcomputinggroup.org
15 *
16 * This program is free software; you can redistribute it and/or
17 * modify it under the terms of the GNU General Public License as
18 * published by the Free Software Foundation, version 2 of the
19 * License.
20 *
21 */
22#ifndef __LINUX_TPM_H__
23#define __LINUX_TPM_H__
24
25#define TPM_DIGEST_SIZE 20 /* Max TPM v1.2 PCR size */
26
27/*
28 * Chip num is this value or a valid tpm idx
29 */
30#define TPM_ANY_NUM 0xFFFF
31
32struct tpm_chip;
33struct trusted_key_payload;
34struct trusted_key_options;
35
36enum TPM_OPS_FLAGS {
37 TPM_OPS_AUTO_STARTUP = BIT(0),
38};
39
40struct tpm_class_ops {
41 unsigned int flags;
42 const u8 req_complete_mask;
43 const u8 req_complete_val;
44 bool (*req_canceled)(struct tpm_chip *chip, u8 status);
45 int (*recv) (struct tpm_chip *chip, u8 *buf, size_t len);
46 int (*send) (struct tpm_chip *chip, u8 *buf, size_t len);
47 void (*cancel) (struct tpm_chip *chip);
48 u8 (*status) (struct tpm_chip *chip);
49 bool (*update_timeouts)(struct tpm_chip *chip,
50 unsigned long *timeout_cap);
51 int (*request_locality)(struct tpm_chip *chip, int loc);
52 void (*relinquish_locality)(struct tpm_chip *chip, int loc);
53};
54
55#if defined(CONFIG_TCG_TPM) || defined(CONFIG_TCG_TPM_MODULE)
56
57extern int tpm_is_tpm2(u32 chip_num);
58extern int tpm_pcr_read(u32 chip_num, int pcr_idx, u8 *res_buf);
59extern int tpm_pcr_extend(u32 chip_num, int pcr_idx, const u8 *hash);
60extern int tpm_send(u32 chip_num, void *cmd, size_t buflen);
61extern int tpm_get_random(u32 chip_num, u8 *data, size_t max);
62extern int tpm_seal_trusted(u32 chip_num,
63 struct trusted_key_payload *payload,
64 struct trusted_key_options *options);
65extern int tpm_unseal_trusted(u32 chip_num,
66 struct trusted_key_payload *payload,
67 struct trusted_key_options *options);
68#else
69static inline int tpm_is_tpm2(u32 chip_num)
70{
71 return -ENODEV;
72}
73static inline int tpm_pcr_read(u32 chip_num, int pcr_idx, u8 *res_buf) {
74 return -ENODEV;
75}
76static inline int tpm_pcr_extend(u32 chip_num, int pcr_idx, const u8 *hash) {
77 return -ENODEV;
78}
79static inline int tpm_send(u32 chip_num, void *cmd, size_t buflen) {
80 return -ENODEV;
81}
82static inline int tpm_get_random(u32 chip_num, u8 *data, size_t max) {
83 return -ENODEV;
84}
85
86static inline int tpm_seal_trusted(u32 chip_num,
87 struct trusted_key_payload *payload,
88 struct trusted_key_options *options)
89{
90 return -ENODEV;
91}
92static inline int tpm_unseal_trusted(u32 chip_num,
93 struct trusted_key_payload *payload,
94 struct trusted_key_options *options)
95{
96 return -ENODEV;
97}
98#endif
99#endif