[linux-2.6-block.git] / 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 */

struct tpm_chip;
struct trusted_key_payload;
struct trusted_key_options;

enum TPM_OPS_FLAGS {
	TPM_OPS_AUTO_STARTUP = BIT(0),
};

struct tpm_class_ops {
	unsigned int flags;
	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);
	int (*go_idle)(struct tpm_chip *chip);
	int (*cmd_ready)(struct tpm_chip *chip);
	int (*request_locality)(struct tpm_chip *chip, int loc);
	int (*relinquish_locality)(struct tpm_chip *chip, int loc);
	void (*clk_enable)(struct tpm_chip *chip, bool value);
};

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

extern int tpm_is_tpm2(struct tpm_chip *chip);
extern int tpm_pcr_read(struct tpm_chip *chip, u32 pcr_idx, u8 *res_buf);
extern int tpm_pcr_extend(struct tpm_chip *chip, u32 pcr_idx, const u8 *hash);
extern int tpm_send(struct tpm_chip *chip, void *cmd, size_t buflen);
extern int tpm_get_random(struct tpm_chip *chip, u8 *data, size_t max);
extern int tpm_seal_trusted(struct tpm_chip *chip,
			    struct trusted_key_payload *payload,
			    struct trusted_key_options *options);
extern int tpm_unseal_trusted(struct tpm_chip *chip,
			      struct trusted_key_payload *payload,
			      struct trusted_key_options *options);
extern struct tpm_chip *tpm_default_chip(void);
#else
static inline int tpm_is_tpm2(struct tpm_chip *chip)
{
	return -ENODEV;
}

static inline int tpm_pcr_read(struct tpm_chip *chip, u32 pcr_idx, u8 *res_buf)
{
	return -ENODEV;
}

static inline int tpm_pcr_extend(struct tpm_chip *chip, u32 pcr_idx,
				 const u8 *hash)
{
	return -ENODEV;
}

static inline int tpm_send(struct tpm_chip *chip, void *cmd, size_t buflen)
{
	return -ENODEV;
}
static inline int tpm_get_random(struct tpm_chip *chip, u8 *data, size_t max)
{
	return -ENODEV;
}

static inline int tpm_seal_trusted(struct tpm_chip *chip,
				   struct trusted_key_payload *payload,
				   struct trusted_key_options *options)
{
	return -ENODEV;
}
static inline int tpm_unseal_trusted(struct tpm_chip *chip,
				     struct trusted_key_payload *payload,
				     struct trusted_key_options *options)
{
	return -ENODEV;
}
static inline struct tpm_chip *tpm_default_chip(void)
{
	return NULL;
}
#endif
#endif
Commit	Line	Data
659aaf2b RA	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
1c16c963 MZ	25	#define TPM_DIGEST_SIZE 20 /* Max TPM v1.2 PCR size */
1c16c963 MZ	26
01ad1fa7	27	struct tpm_chip;
954650ef JS	28	struct trusted_key_payload;
954650ef JS	29	struct trusted_key_options;
01ad1fa7	30
cae8b441 JG	31	enum TPM_OPS_FLAGS {
	32	TPM_OPS_AUTO_STARTUP = BIT(0),
	33	};
	34
01ad1fa7	35	struct tpm_class_ops {
cae8b441	36	unsigned int flags;
01ad1fa7 JG	37	const u8 req_complete_mask;
	38	const u8 req_complete_val;
	39	bool (req_canceled)(struct tpm_chip chip, u8 status);
	40	int (recv) (struct tpm_chip chip, u8 *buf, size_t len);
	41	int (send) (struct tpm_chip chip, u8 *buf, size_t len);
	42	void (cancel) (struct tpm_chip chip);
	43	u8 (status) (struct tpm_chip chip);
8e54caf4 JG	44	bool (update_timeouts)(struct tpm_chip chip,
8e54caf4 JG	45	unsigned long *timeout_cap);
627448e8 TW	46	int (go_idle)(struct tpm_chip chip);
627448e8 TW	47	int (cmd_ready)(struct tpm_chip chip);
877c57d0	48	int (request_locality)(struct tpm_chip chip, int loc);
888d867d	49	int (relinquish_locality)(struct tpm_chip chip, int loc);
b3e958ce	50	void (clk_enable)(struct tpm_chip chip, bool value);
01ad1fa7 JG	51	};
01ad1fa7 JG	52
ff76ec18	53	#if defined(CONFIG_TCG_TPM) \|\| defined(CONFIG_TCG_TPM_MODULE)
659aaf2b	54
aad887f6	55	extern int tpm_is_tpm2(struct tpm_chip *chip);
95adc6b4 TW	56	extern int tpm_pcr_read(struct tpm_chip chip, u32 pcr_idx, u8 res_buf);
95adc6b4 TW	57	extern int tpm_pcr_extend(struct tpm_chip chip, u32 pcr_idx, const u8 hash);
aad887f6 JS	58	extern int tpm_send(struct tpm_chip chip, void cmd, size_t buflen);
	59	extern int tpm_get_random(struct tpm_chip chip, u8 data, size_t max);
	60	extern int tpm_seal_trusted(struct tpm_chip *chip,
954650ef JS	61	struct trusted_key_payload *payload,
954650ef JS	62	struct trusted_key_options *options);
aad887f6	63	extern int tpm_unseal_trusted(struct tpm_chip *chip,
954650ef JS	64	struct trusted_key_payload *payload,
954650ef JS	65	struct trusted_key_options *options);
aaae8153	66	extern struct tpm_chip *tpm_default_chip(void);
d6ba4521	67	#else
aad887f6	68	static inline int tpm_is_tpm2(struct tpm_chip *chip)
954650ef JS	69	{
	70	return -ENODEV;
	71	}
95adc6b4 TW	72
95adc6b4 TW	73	static inline int tpm_pcr_read(struct tpm_chip chip, u32 pcr_idx, u8 res_buf)
aad887f6	74	{
d6ba4521 MZ	75	return -ENODEV;
d6ba4521 MZ	76	}
95adc6b4 TW	77
95adc6b4 TW	78	static inline int tpm_pcr_extend(struct tpm_chip *chip, u32 pcr_idx,
aad887f6 JS	79	const u8 *hash)
aad887f6 JS	80	{
d6ba4521 MZ	81	return -ENODEV;
d6ba4521 MZ	82	}
95adc6b4	83
aad887f6 JS	84	static inline int tpm_send(struct tpm_chip chip, void cmd, size_t buflen)
aad887f6 JS	85	{
c749ba91 MZ	86	return -ENODEV;
c749ba91 MZ	87	}
aad887f6 JS	88	static inline int tpm_get_random(struct tpm_chip chip, u8 data, size_t max)
aad887f6 JS	89	{
41ab999c KY	90	return -ENODEV;
41ab999c KY	91	}
954650ef	92
aad887f6	93	static inline int tpm_seal_trusted(struct tpm_chip *chip,
954650ef JS	94	struct trusted_key_payload *payload,
	95	struct trusted_key_options *options)
	96	{
	97	return -ENODEV;
	98	}
aad887f6	99	static inline int tpm_unseal_trusted(struct tpm_chip *chip,
954650ef JS	100	struct trusted_key_payload *payload,
	101	struct trusted_key_options *options)
	102	{
	103	return -ENODEV;
	104	}
aaae8153 SB	105	static inline struct tpm_chip *tpm_default_chip(void)
	106	{
	107	return NULL;
	108	}
659aaf2b RA	109	#endif
659aaf2b RA	110	#endif