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android-review.linaro.org / kernel / hikey-linaro / bf7ef8f2d57cd1f5f1846dd58ff9309efad58252 / . / include / linux / tpm.h
blob: da158f06e0b2fec35f10e2faea57d806696e4d20 [file] [log] [blame]
Rajiv Andrade659aaf22009-02-02 15:23:44 -0200[diff] [blame]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
Mimi Zohar1c16c962013-05-21 10:40:47 -0400[diff] [blame]25#define TPM_DIGEST_SIZE 20 /* Max TPM v1.2 PCR size */
26
Rajiv Andrade659aaf22009-02-02 15:23:44 -0200[diff] [blame]27/*
28 * Chip num is this value or a valid tpm idx
29 */
30#define TPM_ANY_NUM 0xFFFF
31
Jason Gunthorpe01ad1fa2013-11-26 13:30:43 -0700[diff] [blame]32struct tpm_chip;
Jarkko Sakkinen954650e2015-05-30 08:09:04 +0300[diff] [blame]33struct trusted_key_payload;
34struct trusted_key_options;
Jason Gunthorpe01ad1fa2013-11-26 13:30:43 -0700[diff] [blame]35
Jason Gunthorpecae8b442016-07-12 11:41:49 -0600[diff] [blame]36enum TPM_OPS_FLAGS {
37 TPM_OPS_AUTO_STARTUP = BIT(0),
38};
39
Jason Gunthorpe01ad1fa2013-11-26 13:30:43 -0700[diff] [blame]40struct tpm_class_ops {
Jason Gunthorpecae8b442016-07-12 11:41:49 -0600[diff] [blame]41 unsigned int flags;
Jason Gunthorpe01ad1fa2013-11-26 13:30:43 -0700[diff] [blame]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);
Jason Gunthorpe8e54caf2014-05-21 18:26:44 -0600[diff] [blame]49 bool (*update_timeouts)(struct tpm_chip *chip,
50 unsigned long *timeout_cap);
51
Jason Gunthorpe01ad1fa2013-11-26 13:30:43 -0700[diff] [blame]52};
53
Randy Dunlapff76ec12009-10-28 12:26:39 -0700[diff] [blame]54#if defined(CONFIG_TCG_TPM) || defined(CONFIG_TCG_TPM_MODULE)
Rajiv Andrade659aaf22009-02-02 15:23:44 -0200[diff] [blame]55
Jarkko Sakkinen954650e2015-05-30 08:09:04 +0300[diff] [blame]56extern int tpm_is_tpm2(u32 chip_num);
Rajiv Andrade659aaf22009-02-02 15:23:44 -0200[diff] [blame]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);
Mimi Zoharc749ba92010-11-23 18:54:16 -0500[diff] [blame]59extern int tpm_send(u32 chip_num, void *cmd, size_t buflen);
Kent Yoder41ab9992012-06-07 13:47:14 -0500[diff] [blame]60extern int tpm_get_random(u32 chip_num, u8 *data, size_t max);
Jarkko Sakkinen954650e2015-05-30 08:09:04 +0300[diff] [blame]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);
Mimi Zohard6ba4522009-10-26 09:26:18 -0400[diff] [blame]67#else
Jarkko Sakkinen954650e2015-05-30 08:09:04 +0300[diff] [blame]68static inline int tpm_is_tpm2(u32 chip_num)
69{
70 return -ENODEV;
71}
Mimi Zohard6ba4522009-10-26 09:26:18 -0400[diff] [blame]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}
Mimi Zoharc749ba92010-11-23 18:54:16 -0500[diff] [blame]78static inline int tpm_send(u32 chip_num, void *cmd, size_t buflen) {
79 return -ENODEV;
80}
Kent Yoder41ab9992012-06-07 13:47:14 -0500[diff] [blame]81static inline int tpm_get_random(u32 chip_num, u8 *data, size_t max) {
82 return -ENODEV;
83}
Jarkko Sakkinen954650e2015-05-30 08:09:04 +0300[diff] [blame]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}
Rajiv Andrade659aaf22009-02-02 15:23:44 -0200[diff] [blame]97#endif
98#endif