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
52};
53
54#if defined(CONFIG_TCG_TPM) || defined(CONFIG_TCG_TPM_MODULE)
55
56extern int tpm_is_tpm2(u32 chip_num);
57extern int tpm_pcr_read(u32 chip_num, int pcr_idx, u8 *res_buf);
58extern int tpm_pcr_extend(u32 chip_num, int pcr_idx, const u8 *hash);
59extern int tpm_send(u32 chip_num, void *cmd, size_t buflen);
60extern int tpm_get_random(u32 chip_num, u8 *data, size_t max);
61extern int tpm_seal_trusted(u32 chip_num,
62 struct trusted_key_payload *payload,
63 struct trusted_key_options *options);
64extern int tpm_unseal_trusted(u32 chip_num,
65 struct trusted_key_payload *payload,
66 struct trusted_key_options *options);
67#else
68static inline int tpm_is_tpm2(u32 chip_num)
69{
70 return -ENODEV;
71}
72static inline int tpm_pcr_read(u32 chip_num, int pcr_idx, u8 *res_buf) {
73 return -ENODEV;
74}
75static inline int tpm_pcr_extend(u32 chip_num, int pcr_idx, const u8 *hash) {
76 return -ENODEV;
77}
78static inline int tpm_send(u32 chip_num, void *cmd, size_t buflen) {
79 return -ENODEV;
80}
81static inline int tpm_get_random(u32 chip_num, u8 *data, size_t max) {
82 return -ENODEV;
83}
84
85static inline int tpm_seal_trusted(u32 chip_num,
86 struct trusted_key_payload *payload,
87 struct trusted_key_options *options)
88{
89 return -ENODEV;
90}
91static inline int tpm_unseal_trusted(u32 chip_num,
92 struct trusted_key_payload *payload,
93 struct trusted_key_options *options)
94{
95 return -ENODEV;
96}
97#endif
98#endif