| /* | |
| * 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, int pcr_idx, u8 *res_buf); | |
| extern int tpm_pcr_extend(struct tpm_chip *chip, int 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, int pcr_idx, u8 *res_buf) | |
| { | |
| return -ENODEV; | |
| } | |
| static inline int tpm_pcr_extend(struct tpm_chip *chip, int 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 |