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
27struct tpm_chip;
28struct trusted_key_payload;
29struct trusted_key_options;
30
31enum TPM_OPS_FLAGS {
32 TPM_OPS_AUTO_STARTUP = BIT(0),
33};
34
35struct tpm_class_ops {
36 unsigned int flags;
37 const u8 req_complete_mask;
38 const u8 req_complete_val;
39 bool (*req_canceled)(struct tpm_chip *chip, u8 status);
40 int (*recv) (struct tpm_chip *chip, u8 *buf, size_t len);
41 int (*send) (struct tpm_chip *chip, u8 *buf, size_t len);
42 void (*cancel) (struct tpm_chip *chip);
43 u8 (*status) (struct tpm_chip *chip);
44 bool (*update_timeouts)(struct tpm_chip *chip,
45 unsigned long *timeout_cap);
46 int (*go_idle)(struct tpm_chip *chip);
47 int (*cmd_ready)(struct tpm_chip *chip);
48 int (*request_locality)(struct tpm_chip *chip, int loc);
49 int (*relinquish_locality)(struct tpm_chip *chip, int loc);
50 void (*clk_enable)(struct tpm_chip *chip, bool value);
51};
52
53#if defined(CONFIG_TCG_TPM) || defined(CONFIG_TCG_TPM_MODULE)
54
55extern int tpm_is_tpm2(struct tpm_chip *chip);
56extern int tpm_pcr_read(struct tpm_chip *chip, int pcr_idx, u8 *res_buf);
57extern int tpm_pcr_extend(struct tpm_chip *chip, int pcr_idx, const u8 *hash);
58extern int tpm_send(struct tpm_chip *chip, void *cmd, size_t buflen);
59extern int tpm_get_random(struct tpm_chip *chip, u8 *data, size_t max);
60extern int tpm_seal_trusted(struct tpm_chip *chip,
61 struct trusted_key_payload *payload,
62 struct trusted_key_options *options);
63extern int tpm_unseal_trusted(struct tpm_chip *chip,
64 struct trusted_key_payload *payload,
65 struct trusted_key_options *options);
66extern struct tpm_chip *tpm_default_chip(void);
67#else
68static inline int tpm_is_tpm2(struct tpm_chip *chip)
69{
70 return -ENODEV;
71}
72static inline int tpm_pcr_read(struct tpm_chip *chip, int pcr_idx, u8 *res_buf)
73{
74 return -ENODEV;
75}
76static inline int tpm_pcr_extend(struct tpm_chip *chip, int pcr_idx,
77 const u8 *hash)
78{
79 return -ENODEV;
80}
81static inline int tpm_send(struct tpm_chip *chip, void *cmd, size_t buflen)
82{
83 return -ENODEV;
84}
85static inline int tpm_get_random(struct tpm_chip *chip, u8 *data, size_t max)
86{
87 return -ENODEV;
88}
89
90static inline int tpm_seal_trusted(struct tpm_chip *chip,
91 struct trusted_key_payload *payload,
92 struct trusted_key_options *options)
93{
94 return -ENODEV;
95}
96static inline int tpm_unseal_trusted(struct tpm_chip *chip,
97 struct trusted_key_payload *payload,
98 struct trusted_key_options *options)
99{
100 return -ENODEV;
101}
102static inline struct tpm_chip *tpm_default_chip(void)
103{
104 return NULL;
105}
106#endif
107#endif