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gerrit-public.fairphone.software / kernel / msm-4.19 / 81f77fd0deeb866d65ccc79733df8d2af5217c82 / . / include / linux / tpm.h
blob: bcdd3790e94ddeac42161e55f98dcb284949a2d7 [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
Jason Gunthorpe01ad1fa2013-11-26 13:30:43 -0700[diff] [blame]27struct tpm_chip;
Jarkko Sakkinen954650e2015-05-30 08:09:04 +0300[diff] [blame]28struct trusted_key_payload;
29struct trusted_key_options;
Jason Gunthorpe01ad1fa2013-11-26 13:30:43 -0700[diff] [blame]30
Jason Gunthorpecae8b442016-07-12 11:41:49 -0600[diff] [blame]31enum TPM_OPS_FLAGS {
32 TPM_OPS_AUTO_STARTUP = BIT(0),
33};
34
Jason Gunthorpe01ad1fa2013-11-26 13:30:43 -0700[diff] [blame]35struct tpm_class_ops {
Jason Gunthorpecae8b442016-07-12 11:41:49 -0600[diff] [blame]36 unsigned int flags;
Jason Gunthorpe01ad1fa2013-11-26 13:30:43 -0700[diff] [blame]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);
Jason Gunthorpe8e54caf2014-05-21 18:26:44 -0600[diff] [blame]44 bool (*update_timeouts)(struct tpm_chip *chip,
45 unsigned long *timeout_cap);
Jarkko Sakkinen877c57d2017-03-24 11:45:49 +0200[diff] [blame]46 int (*request_locality)(struct tpm_chip *chip, int loc);
47 void (*relinquish_locality)(struct tpm_chip *chip, int loc);
Azhar Shaikhb3e958c2017-12-22 12:13:44 -0800[diff] [blame]48 void (*clk_enable)(struct tpm_chip *chip, bool value);
Jason Gunthorpe01ad1fa2013-11-26 13:30:43 -0700[diff] [blame]49};
50
Randy Dunlapff76ec12009-10-28 12:26:39 -0700[diff] [blame]51#if defined(CONFIG_TCG_TPM) || defined(CONFIG_TCG_TPM_MODULE)
Rajiv Andrade659aaf22009-02-02 15:23:44 -0200[diff] [blame]52
Jarkko Sakkinenaad887f2017-11-05 13:16:26 +0200[diff] [blame]53extern int tpm_is_tpm2(struct tpm_chip *chip);
54extern int tpm_pcr_read(struct tpm_chip *chip, int pcr_idx, u8 *res_buf);
55extern int tpm_pcr_extend(struct tpm_chip *chip, int pcr_idx, const u8 *hash);
56extern int tpm_send(struct tpm_chip *chip, void *cmd, size_t buflen);
57extern int tpm_get_random(struct tpm_chip *chip, u8 *data, size_t max);
58extern int tpm_seal_trusted(struct tpm_chip *chip,
Jarkko Sakkinen954650e2015-05-30 08:09:04 +0300[diff] [blame]59 struct trusted_key_payload *payload,
60 struct trusted_key_options *options);
Jarkko Sakkinenaad887f2017-11-05 13:16:26 +0200[diff] [blame]61extern int tpm_unseal_trusted(struct tpm_chip *chip,
Jarkko Sakkinen954650e2015-05-30 08:09:04 +0300[diff] [blame]62 struct trusted_key_payload *payload,
63 struct trusted_key_options *options);
Mimi Zohard6ba4522009-10-26 09:26:18 -0400[diff] [blame]64#else
Jarkko Sakkinenaad887f2017-11-05 13:16:26 +0200[diff] [blame]65static inline int tpm_is_tpm2(struct tpm_chip *chip)
Jarkko Sakkinen954650e2015-05-30 08:09:04 +0300[diff] [blame]66{
67 return -ENODEV;
68}
Jarkko Sakkinenaad887f2017-11-05 13:16:26 +0200[diff] [blame]69static inline int tpm_pcr_read(struct tpm_chip *chip, int pcr_idx, u8 *res_buf)
70{
Mimi Zohard6ba4522009-10-26 09:26:18 -0400[diff] [blame]71 return -ENODEV;
72}
Jarkko Sakkinenaad887f2017-11-05 13:16:26 +0200[diff] [blame]73static inline int tpm_pcr_extend(struct tpm_chip *chip, int pcr_idx,
74 const u8 *hash)
75{
Mimi Zohard6ba4522009-10-26 09:26:18 -0400[diff] [blame]76 return -ENODEV;
77}
Jarkko Sakkinenaad887f2017-11-05 13:16:26 +0200[diff] [blame]78static inline int tpm_send(struct tpm_chip *chip, void *cmd, size_t buflen)
79{
Mimi Zoharc749ba92010-11-23 18:54:16 -0500[diff] [blame]80 return -ENODEV;
81}
Jarkko Sakkinenaad887f2017-11-05 13:16:26 +0200[diff] [blame]82static inline int tpm_get_random(struct tpm_chip *chip, u8 *data, size_t max)
83{
Kent Yoder41ab9992012-06-07 13:47:14 -0500[diff] [blame]84 return -ENODEV;
85}
Jarkko Sakkinen954650e2015-05-30 08:09:04 +0300[diff] [blame]86
Jarkko Sakkinenaad887f2017-11-05 13:16:26 +0200[diff] [blame]87static inline int tpm_seal_trusted(struct tpm_chip *chip,
Jarkko Sakkinen954650e2015-05-30 08:09:04 +0300[diff] [blame]88 struct trusted_key_payload *payload,
89 struct trusted_key_options *options)
90{
91 return -ENODEV;
92}
Jarkko Sakkinenaad887f2017-11-05 13:16:26 +0200[diff] [blame]93static inline int tpm_unseal_trusted(struct tpm_chip *chip,
Jarkko Sakkinen954650e2015-05-30 08:09:04 +0300[diff] [blame]94 struct trusted_key_payload *payload,
95 struct trusted_key_options *options)
96{
97 return -ENODEV;
98}
Rajiv Andrade659aaf22009-02-02 15:23:44 -0200[diff] [blame]99#endif
100#endif