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TOMOYO Linux Cross Reference
Linux/include/linux/tpm.h

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  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 
 25 #define TPM_DIGEST_SIZE 20      /* Max TPM v1.2 PCR size */
 26 
 27 /*
 28  * Chip num is this value or a valid tpm idx
 29  */
 30 #define TPM_ANY_NUM 0xFFFF
 31 
 32 struct tpm_chip;
 33 
 34 struct 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);
 42         bool (*update_timeouts)(struct tpm_chip *chip,
 43                                 unsigned long *timeout_cap);
 44 
 45 };
 46 
 47 #if defined(CONFIG_TCG_TPM) || defined(CONFIG_TCG_TPM_MODULE)
 48 
 49 extern int tpm_pcr_read(u32 chip_num, int pcr_idx, u8 *res_buf);
 50 extern int tpm_pcr_extend(u32 chip_num, int pcr_idx, const u8 *hash);
 51 extern int tpm_send(u32 chip_num, void *cmd, size_t buflen);
 52 extern int tpm_get_random(u32 chip_num, u8 *data, size_t max);
 53 #else
 54 static inline int tpm_pcr_read(u32 chip_num, int pcr_idx, u8 *res_buf) {
 55         return -ENODEV;
 56 }
 57 static inline int tpm_pcr_extend(u32 chip_num, int pcr_idx, const u8 *hash) {
 58         return -ENODEV;
 59 }
 60 static inline int tpm_send(u32 chip_num, void *cmd, size_t buflen) {
 61         return -ENODEV;
 62 }
 63 static inline int tpm_get_random(u32 chip_num, u8 *data, size_t max) {
 64         return -ENODEV;
 65 }
 66 #endif
 67 #endif
 68 

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