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//lib/modules/2.6.32-754.el6.x86_64/source/include/linux/tpm.h

/*
 * Copyright (C) 2004,2007,2008 IBM Corporation
 *
 * Authors:
 * Leendert van Doorn <leendert@watson.ibm.com>
 * Dave Safford <safford@watson.ibm.com>
 * Reiner Sailer <sailer@watson.ibm.com>
 * Kylene Hall <kjhall@us.ibm.com>
 * Debora Velarde <dvelarde@us.ibm.com>
 *
 * Maintained by: <tpmdd_devel@lists.sourceforge.net>
 *
 * Device driver for TCG/TCPA TPM (trusted platform module).
 * Specifications at www.trustedcomputinggroup.org
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation, version 2 of the
 * License.
 *
 */
#ifndef __LINUX_TPM_H__
#define __LINUX_TPM_H__

#define TPM_DIGEST_SIZE 20	/* Max TPM v1.2 PCR size */

/*
 * Chip num is this value or a valid tpm idx
 */
#define	TPM_ANY_NUM 0xFFFF

struct tpm_chip;

struct tpm_class_ops {
	const u8 req_complete_mask;
	const u8 req_complete_val;
	bool (*req_canceled)(struct tpm_chip *chip, u8 status);
	int (*recv) (struct tpm_chip *chip, u8 *buf, size_t len);
	int (*send) (struct tpm_chip *chip, u8 *buf, size_t len);
	void (*cancel) (struct tpm_chip *chip);
	u8 (*status) (struct tpm_chip *chip);
	bool (*update_timeouts)(struct tpm_chip *chip,
				unsigned long *timeout_cap);

};

#if defined(CONFIG_TCG_TPM) || defined(CONFIG_TCG_TPM_MODULE)

extern int tpm_pcr_read(u32 chip_num, int pcr_idx, u8 *res_buf);
extern int tpm_pcr_extend(u32 chip_num, int pcr_idx, const u8 *hash);
extern int tpm_send(u32 chip_num, void *cmd, size_t buflen);
#else
static inline int tpm_pcr_read(u32 chip_num, int pcr_idx, u8 *res_buf) {
	return -ENODEV;
}
static inline int tpm_pcr_extend(u32 chip_num, int pcr_idx, const u8 *hash) {
	return -ENODEV;
}
static inline int tpm_send(u32 chip_num, void *cmd, size_t buflen) {
	return -ENODEV;
}
#endif
#endif

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