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/*
* 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__
#include <crypto/hash_info.h>
#define TPM_DIGEST_SIZE 20 /* Max TPM v1.2 PCR size */
#define TPM_MAX_DIGEST_SIZE SHA512_DIGEST_SIZE
struct tpm_chip;
struct trusted_key_payload;
struct trusted_key_options;
enum tpm_algorithms {
TPM_ALG_ERROR = 0x0000,
TPM_ALG_SHA1 = 0x0004,
TPM_ALG_KEYEDHASH = 0x0008,
TPM_ALG_SHA256 = 0x000B,
TPM_ALG_SHA384 = 0x000C,
TPM_ALG_SHA512 = 0x000D,
TPM_ALG_NULL = 0x0010,
TPM_ALG_SM3_256 = 0x0012,
};
struct tpm_digest {
u16 alg_id;
u8 digest[TPM_MAX_DIGEST_SIZE];
} __packed;
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);
void (*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
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