2 * Copyright (C) 2004,2007,2008 IBM Corporation
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>
11 * Maintained by: <tpmdd_devel@lists.sourceforge.net>
13 * Device driver for TCG/TCPA TPM (trusted platform module).
14 * Specifications at www.trustedcomputinggroup.org
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
22 #ifndef __LINUX_TPM_H__
23 #define __LINUX_TPM_H__
25 #define TPM_DIGEST_SIZE 20 /* Max TPM v1.2 PCR size */
28 * Chip num is this value or a valid tpm idx
30 #define TPM_ANY_NUM 0xFFFF
33 struct trusted_key_payload;
34 struct trusted_key_options;
37 TPM_OPS_AUTO_STARTUP = BIT(0),
40 struct tpm_class_ops {
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 int (*request_locality)(struct tpm_chip *chip, int loc);
52 void (*relinquish_locality)(struct tpm_chip *chip, int loc);
55 #if defined(CONFIG_TCG_TPM) || defined(CONFIG_TCG_TPM_MODULE)
57 extern int tpm_is_tpm2(u32 chip_num);
58 extern int tpm_pcr_read(u32 chip_num, int pcr_idx, u8 *res_buf);
59 extern int tpm_pcr_extend(u32 chip_num, int pcr_idx, const u8 *hash);
60 extern int tpm_send(u32 chip_num, void *cmd, size_t buflen);
61 extern int tpm_get_random(u32 chip_num, u8 *data, size_t max);
62 extern int tpm_seal_trusted(u32 chip_num,
63 struct trusted_key_payload *payload,
64 struct trusted_key_options *options);
65 extern int tpm_unseal_trusted(u32 chip_num,
66 struct trusted_key_payload *payload,
67 struct trusted_key_options *options);
69 static inline int tpm_is_tpm2(u32 chip_num)
73 static inline int tpm_pcr_read(u32 chip_num, int pcr_idx, u8 *res_buf) {
76 static inline int tpm_pcr_extend(u32 chip_num, int pcr_idx, const u8 *hash) {
79 static inline int tpm_send(u32 chip_num, void *cmd, size_t buflen) {
82 static inline int tpm_get_random(u32 chip_num, u8 *data, size_t max) {
86 static inline int tpm_seal_trusted(u32 chip_num,
87 struct trusted_key_payload *payload,
88 struct trusted_key_options *options)
92 static inline int tpm_unseal_trusted(u32 chip_num,
93 struct trusted_key_payload *payload,
94 struct trusted_key_options *options)