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gerrit-public.fairphone.software / kernel / msm-4.9 / f634da375fc9675a978b36298579b5c2d87a6a8b / . / include / linux / tpm.h
blob: 8350c538b486cd217da6a067f4d008cbd3cdd8f2 [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;
33
34struct tpm_class_ops {
35 const u8 req_complete_mask;
36 const u8 req_complete_val;
37 bool (*req_canceled)(struct tpm_chip *chip, u8 status);
38 int (*recv) (struct tpm_chip *chip, u8 *buf, size_t len);
39 int (*send) (struct tpm_chip *chip, u8 *buf, size_t len);
40 void (*cancel) (struct tpm_chip *chip);
41 u8 (*status) (struct tpm_chip *chip);
Jason Gunthorpe8e54caf2014-05-21 18:26:44 -0600[diff] [blame]42 bool (*update_timeouts)(struct tpm_chip *chip,
43 unsigned long *timeout_cap);
44
Jason Gunthorpe01ad1fa2013-11-26 13:30:43 -0700[diff] [blame]45};
46
Randy Dunlapff76ec12009-10-28 12:26:39 -0700[diff] [blame]47#if defined(CONFIG_TCG_TPM) || defined(CONFIG_TCG_TPM_MODULE)
Rajiv Andrade659aaf22009-02-02 15:23:44 -0200[diff] [blame]48
49extern int tpm_pcr_read(u32 chip_num, int pcr_idx, u8 *res_buf);
50extern int tpm_pcr_extend(u32 chip_num, int pcr_idx, const u8 *hash);
Mimi Zoharc749ba92010-11-23 18:54:16 -0500[diff] [blame]51extern int tpm_send(u32 chip_num, void *cmd, size_t buflen);
Kent Yoder41ab9992012-06-07 13:47:14 -0500[diff] [blame]52extern int tpm_get_random(u32 chip_num, u8 *data, size_t max);
Mimi Zohard6ba4522009-10-26 09:26:18 -0400[diff] [blame]53#else
54static inline int tpm_pcr_read(u32 chip_num, int pcr_idx, u8 *res_buf) {
55 return -ENODEV;
56}
57static inline int tpm_pcr_extend(u32 chip_num, int pcr_idx, const u8 *hash) {
58 return -ENODEV;
59}
Mimi Zoharc749ba92010-11-23 18:54:16 -0500[diff] [blame]60static inline int tpm_send(u32 chip_num, void *cmd, size_t buflen) {
61 return -ENODEV;
62}
Kent Yoder41ab9992012-06-07 13:47:14 -0500[diff] [blame]63static inline int tpm_get_random(u32 chip_num, u8 *data, size_t max) {
64 return -ENODEV;
65}
Rajiv Andrade659aaf22009-02-02 15:23:44 -0200[diff] [blame]66#endif
67#endif