| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 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 | |
| 25 | #define TPM_DIGEST_SIZE 20 /* Max TPM v1.2 PCR size */ |
| 26 | |
| 27 | struct tpm_chip; |
| 28 | struct trusted_key_payload; |
| 29 | struct trusted_key_options; |
| 30 | |
| 31 | enum TPM_OPS_FLAGS { |
| 32 | TPM_OPS_AUTO_STARTUP = BIT(0), |
| 33 | }; |
| 34 | |
| 35 | struct tpm_class_ops { |
| 36 | unsigned int flags; |
| 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); |
| 44 | bool (*update_timeouts)(struct tpm_chip *chip, |
| 45 | unsigned long *timeout_cap); |
| 46 | int (*go_idle)(struct tpm_chip *chip); |
| 47 | int (*cmd_ready)(struct tpm_chip *chip); |
| 48 | int (*request_locality)(struct tpm_chip *chip, int loc); |
| 49 | int (*relinquish_locality)(struct tpm_chip *chip, int loc); |
| 50 | void (*clk_enable)(struct tpm_chip *chip, bool value); |
| 51 | }; |
| 52 | |
| 53 | #if defined(CONFIG_TCG_TPM) || defined(CONFIG_TCG_TPM_MODULE) |
| 54 | |
| 55 | extern int tpm_is_tpm2(struct tpm_chip *chip); |
| 56 | extern int tpm_pcr_read(struct tpm_chip *chip, int pcr_idx, u8 *res_buf); |
| 57 | extern int tpm_pcr_extend(struct tpm_chip *chip, int pcr_idx, const u8 *hash); |
| 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, |
| 61 | struct trusted_key_payload *payload, |
| 62 | struct trusted_key_options *options); |
| 63 | extern int tpm_unseal_trusted(struct tpm_chip *chip, |
| 64 | struct trusted_key_payload *payload, |
| 65 | struct trusted_key_options *options); |
| 66 | extern struct tpm_chip *tpm_default_chip(void); |
| 67 | #else |
| 68 | static inline int tpm_is_tpm2(struct tpm_chip *chip) |
| 69 | { |
| 70 | return -ENODEV; |
| 71 | } |
| 72 | static inline int tpm_pcr_read(struct tpm_chip *chip, int pcr_idx, u8 *res_buf) |
| 73 | { |
| 74 | return -ENODEV; |
| 75 | } |
| 76 | static inline int tpm_pcr_extend(struct tpm_chip *chip, int pcr_idx, |
| 77 | const u8 *hash) |
| 78 | { |
| 79 | return -ENODEV; |
| 80 | } |
| 81 | static inline int tpm_send(struct tpm_chip *chip, void *cmd, size_t buflen) |
| 82 | { |
| 83 | return -ENODEV; |
| 84 | } |
| 85 | static inline int tpm_get_random(struct tpm_chip *chip, u8 *data, size_t max) |
| 86 | { |
| 87 | return -ENODEV; |
| 88 | } |
| 89 | |
| 90 | static inline int tpm_seal_trusted(struct tpm_chip *chip, |
| 91 | struct trusted_key_payload *payload, |
| 92 | struct trusted_key_options *options) |
| 93 | { |
| 94 | return -ENODEV; |
| 95 | } |
| 96 | static inline int tpm_unseal_trusted(struct tpm_chip *chip, |
| 97 | struct trusted_key_payload *payload, |
| 98 | struct trusted_key_options *options) |
| 99 | { |
| 100 | return -ENODEV; |
| 101 | } |
| 102 | static inline struct tpm_chip *tpm_default_chip(void) |
| 103 | { |
| 104 | return NULL; |
| 105 | } |
| 106 | #endif |
| 107 | #endif |