/* * 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