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Rajiv Andrade659aaf22009-02-02 15:23:44 -02001/*
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 -040025#define TPM_DIGEST_SIZE 20 /* Max TPM v1.2 PCR size */
26
Rajiv Andrade659aaf22009-02-02 15:23:44 -020027/*
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 -070032struct tpm_chip;
Jarkko Sakkinen954650e2015-05-30 08:09:04 +030033struct trusted_key_payload;
34struct trusted_key_options;
Jason Gunthorpe01ad1fa2013-11-26 13:30:43 -070035
Jason Gunthorpecae8b442016-07-12 11:41:49 -060036enum TPM_OPS_FLAGS {
37 TPM_OPS_AUTO_STARTUP = BIT(0),
38};
39
Jason Gunthorpe01ad1fa2013-11-26 13:30:43 -070040struct tpm_class_ops {
Jason Gunthorpecae8b442016-07-12 11:41:49 -060041 unsigned int flags;
Jason Gunthorpe01ad1fa2013-11-26 13:30:43 -070042 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 -060049 bool (*update_timeouts)(struct tpm_chip *chip,
50 unsigned long *timeout_cap);
Tomas Winklere5d857d2018-06-28 18:13:33 +030051 int (*go_idle)(struct tpm_chip *chip);
52 int (*cmd_ready)(struct tpm_chip *chip);
Jarkko Sakkinen877c57d2017-03-24 11:45:49 +020053 int (*request_locality)(struct tpm_chip *chip, int loc);
Tomas Winklerac5881b2018-03-05 13:34:49 +020054 int (*relinquish_locality)(struct tpm_chip *chip, int loc);
Azhar Shaikh7cea3382017-12-22 12:13:44 -080055 void (*clk_enable)(struct tpm_chip *chip, bool value);
Jason Gunthorpe01ad1fa2013-11-26 13:30:43 -070056};
57
Randy Dunlapff76ec12009-10-28 12:26:39 -070058#if defined(CONFIG_TCG_TPM) || defined(CONFIG_TCG_TPM_MODULE)
Rajiv Andrade659aaf22009-02-02 15:23:44 -020059
Jarkko Sakkinen954650e2015-05-30 08:09:04 +030060extern int tpm_is_tpm2(u32 chip_num);
Rajiv Andrade659aaf22009-02-02 15:23:44 -020061extern int tpm_pcr_read(u32 chip_num, int pcr_idx, u8 *res_buf);
62extern int tpm_pcr_extend(u32 chip_num, int pcr_idx, const u8 *hash);
Mimi Zoharc749ba92010-11-23 18:54:16 -050063extern int tpm_send(u32 chip_num, void *cmd, size_t buflen);
Kent Yoder41ab9992012-06-07 13:47:14 -050064extern int tpm_get_random(u32 chip_num, u8 *data, size_t max);
Jarkko Sakkinen954650e2015-05-30 08:09:04 +030065extern int tpm_seal_trusted(u32 chip_num,
66 struct trusted_key_payload *payload,
67 struct trusted_key_options *options);
68extern int tpm_unseal_trusted(u32 chip_num,
69 struct trusted_key_payload *payload,
70 struct trusted_key_options *options);
Mimi Zohard6ba4522009-10-26 09:26:18 -040071#else
Jarkko Sakkinen954650e2015-05-30 08:09:04 +030072static inline int tpm_is_tpm2(u32 chip_num)
73{
74 return -ENODEV;
75}
Mimi Zohard6ba4522009-10-26 09:26:18 -040076static inline int tpm_pcr_read(u32 chip_num, int pcr_idx, u8 *res_buf) {
77 return -ENODEV;
78}
79static inline int tpm_pcr_extend(u32 chip_num, int pcr_idx, const u8 *hash) {
80 return -ENODEV;
81}
Mimi Zoharc749ba92010-11-23 18:54:16 -050082static inline int tpm_send(u32 chip_num, void *cmd, size_t buflen) {
83 return -ENODEV;
84}
Kent Yoder41ab9992012-06-07 13:47:14 -050085static inline int tpm_get_random(u32 chip_num, u8 *data, size_t max) {
86 return -ENODEV;
87}
Jarkko Sakkinen954650e2015-05-30 08:09:04 +030088
89static inline int tpm_seal_trusted(u32 chip_num,
90 struct trusted_key_payload *payload,
91 struct trusted_key_options *options)
92{
93 return -ENODEV;
94}
95static inline int tpm_unseal_trusted(u32 chip_num,
96 struct trusted_key_payload *payload,
97 struct trusted_key_options *options)
98{
99 return -ENODEV;
100}
Rajiv Andrade659aaf22009-02-02 15:23:44 -0200101#endif
102#endif