mirror of https://gitee.com/openkylin/linux.git
247 lines
6.8 KiB
C
247 lines
6.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (C) 2004 IBM Corporation
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* Copyright (C) 2015 Intel Corporation
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*
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* Authors:
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* Leendert van Doorn <leendert@watson.ibm.com>
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* Dave Safford <safford@watson.ibm.com>
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* Reiner Sailer <sailer@watson.ibm.com>
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* Kylene Hall <kjhall@us.ibm.com>
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*
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* Maintained by: <tpmdd-devel@lists.sourceforge.net>
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*
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* Device driver for TCG/TCPA TPM (trusted platform module).
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* Specifications at www.trustedcomputinggroup.org
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*/
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#ifndef __TPM_H__
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#define __TPM_H__
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#include <linux/module.h>
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#include <linux/delay.h>
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#include <linux/mutex.h>
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#include <linux/sched.h>
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#include <linux/platform_device.h>
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#include <linux/io.h>
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#include <linux/tpm.h>
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#include <linux/tpm_eventlog.h>
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#ifdef CONFIG_X86
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#include <asm/intel-family.h>
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#endif
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#define TPM_MINOR 224 /* officially assigned */
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#define TPM_BUFSIZE 4096
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#define TPM_NUM_DEVICES 65536
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#define TPM_RETRY 50
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enum tpm_timeout {
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TPM_TIMEOUT = 5, /* msecs */
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TPM_TIMEOUT_RETRY = 100, /* msecs */
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TPM_TIMEOUT_RANGE_US = 300, /* usecs */
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TPM_TIMEOUT_POLL = 1, /* msecs */
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TPM_TIMEOUT_USECS_MIN = 100, /* usecs */
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TPM_TIMEOUT_USECS_MAX = 500 /* usecs */
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};
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/* TPM addresses */
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enum tpm_addr {
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TPM_SUPERIO_ADDR = 0x2E,
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TPM_ADDR = 0x4E,
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};
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#define TPM_WARN_RETRY 0x800
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#define TPM_WARN_DOING_SELFTEST 0x802
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#define TPM_ERR_DEACTIVATED 0x6
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#define TPM_ERR_DISABLED 0x7
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#define TPM_ERR_INVALID_POSTINIT 38
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#define TPM_TAG_RQU_COMMAND 193
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/* TPM2 specific constants. */
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#define TPM2_SPACE_BUFFER_SIZE 16384 /* 16 kB */
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struct stclear_flags_t {
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__be16 tag;
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u8 deactivated;
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u8 disableForceClear;
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u8 physicalPresence;
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u8 physicalPresenceLock;
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u8 bGlobalLock;
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} __packed;
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struct tpm1_version {
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u8 major;
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u8 minor;
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u8 rev_major;
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u8 rev_minor;
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} __packed;
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struct tpm1_version2 {
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__be16 tag;
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struct tpm1_version version;
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} __packed;
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struct timeout_t {
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__be32 a;
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__be32 b;
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__be32 c;
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__be32 d;
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} __packed;
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struct duration_t {
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__be32 tpm_short;
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__be32 tpm_medium;
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__be32 tpm_long;
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} __packed;
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struct permanent_flags_t {
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__be16 tag;
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u8 disable;
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u8 ownership;
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u8 deactivated;
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u8 readPubek;
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u8 disableOwnerClear;
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u8 allowMaintenance;
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u8 physicalPresenceLifetimeLock;
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u8 physicalPresenceHWEnable;
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u8 physicalPresenceCMDEnable;
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u8 CEKPUsed;
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u8 TPMpost;
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u8 TPMpostLock;
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u8 FIPS;
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u8 operator;
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u8 enableRevokeEK;
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u8 nvLocked;
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u8 readSRKPub;
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u8 tpmEstablished;
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u8 maintenanceDone;
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u8 disableFullDALogicInfo;
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} __packed;
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typedef union {
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struct permanent_flags_t perm_flags;
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struct stclear_flags_t stclear_flags;
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__u8 owned;
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__be32 num_pcrs;
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struct tpm1_version version1;
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struct tpm1_version2 version2;
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__be32 manufacturer_id;
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struct timeout_t timeout;
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struct duration_t duration;
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} cap_t;
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enum tpm_capabilities {
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TPM_CAP_FLAG = 4,
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TPM_CAP_PROP = 5,
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TPM_CAP_VERSION_1_1 = 0x06,
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TPM_CAP_VERSION_1_2 = 0x1A,
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};
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enum tpm_sub_capabilities {
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TPM_CAP_PROP_PCR = 0x101,
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TPM_CAP_PROP_MANUFACTURER = 0x103,
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TPM_CAP_FLAG_PERM = 0x108,
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TPM_CAP_FLAG_VOL = 0x109,
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TPM_CAP_PROP_OWNER = 0x111,
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TPM_CAP_PROP_TIS_TIMEOUT = 0x115,
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TPM_CAP_PROP_TIS_DURATION = 0x120,
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};
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/* 128 bytes is an arbitrary cap. This could be as large as TPM_BUFSIZE - 18
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* bytes, but 128 is still a relatively large number of random bytes and
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* anything much bigger causes users of struct tpm_cmd_t to start getting
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* compiler warnings about stack frame size. */
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#define TPM_MAX_RNG_DATA 128
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extern struct class *tpm_class;
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extern struct class *tpmrm_class;
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extern dev_t tpm_devt;
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extern const struct file_operations tpm_fops;
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extern const struct file_operations tpmrm_fops;
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extern struct idr dev_nums_idr;
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ssize_t tpm_transmit(struct tpm_chip *chip, u8 *buf, size_t bufsiz);
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ssize_t tpm_transmit_cmd(struct tpm_chip *chip, struct tpm_buf *buf,
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size_t min_rsp_body_length, const char *desc);
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int tpm_get_timeouts(struct tpm_chip *);
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int tpm_auto_startup(struct tpm_chip *chip);
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int tpm1_pm_suspend(struct tpm_chip *chip, u32 tpm_suspend_pcr);
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int tpm1_auto_startup(struct tpm_chip *chip);
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int tpm1_do_selftest(struct tpm_chip *chip);
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int tpm1_get_timeouts(struct tpm_chip *chip);
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unsigned long tpm1_calc_ordinal_duration(struct tpm_chip *chip, u32 ordinal);
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int tpm1_pcr_extend(struct tpm_chip *chip, u32 pcr_idx, const u8 *hash,
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const char *log_msg);
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int tpm1_pcr_read(struct tpm_chip *chip, u32 pcr_idx, u8 *res_buf);
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ssize_t tpm1_getcap(struct tpm_chip *chip, u32 subcap_id, cap_t *cap,
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const char *desc, size_t min_cap_length);
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int tpm1_get_random(struct tpm_chip *chip, u8 *out, size_t max);
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int tpm1_get_pcr_allocation(struct tpm_chip *chip);
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unsigned long tpm_calc_ordinal_duration(struct tpm_chip *chip, u32 ordinal);
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int tpm_pm_suspend(struct device *dev);
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int tpm_pm_resume(struct device *dev);
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static inline void tpm_msleep(unsigned int delay_msec)
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{
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usleep_range((delay_msec * 1000) - TPM_TIMEOUT_RANGE_US,
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delay_msec * 1000);
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};
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int tpm_chip_start(struct tpm_chip *chip);
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void tpm_chip_stop(struct tpm_chip *chip);
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struct tpm_chip *tpm_find_get_ops(struct tpm_chip *chip);
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__must_check int tpm_try_get_ops(struct tpm_chip *chip);
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void tpm_put_ops(struct tpm_chip *chip);
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struct tpm_chip *tpm_chip_alloc(struct device *dev,
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const struct tpm_class_ops *ops);
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struct tpm_chip *tpmm_chip_alloc(struct device *pdev,
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const struct tpm_class_ops *ops);
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int tpm_chip_register(struct tpm_chip *chip);
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void tpm_chip_unregister(struct tpm_chip *chip);
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void tpm_sysfs_add_device(struct tpm_chip *chip);
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#ifdef CONFIG_ACPI
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extern void tpm_add_ppi(struct tpm_chip *chip);
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#else
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static inline void tpm_add_ppi(struct tpm_chip *chip)
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{
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}
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#endif
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int tpm2_get_timeouts(struct tpm_chip *chip);
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int tpm2_pcr_read(struct tpm_chip *chip, u32 pcr_idx,
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struct tpm_digest *digest, u16 *digest_size_ptr);
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int tpm2_pcr_extend(struct tpm_chip *chip, u32 pcr_idx,
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struct tpm_digest *digests);
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int tpm2_get_random(struct tpm_chip *chip, u8 *dest, size_t max);
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ssize_t tpm2_get_tpm_pt(struct tpm_chip *chip, u32 property_id,
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u32 *value, const char *desc);
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ssize_t tpm2_get_pcr_allocation(struct tpm_chip *chip);
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int tpm2_auto_startup(struct tpm_chip *chip);
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void tpm2_shutdown(struct tpm_chip *chip, u16 shutdown_type);
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unsigned long tpm2_calc_ordinal_duration(struct tpm_chip *chip, u32 ordinal);
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int tpm2_probe(struct tpm_chip *chip);
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int tpm2_get_cc_attrs_tbl(struct tpm_chip *chip);
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int tpm2_find_cc(struct tpm_chip *chip, u32 cc);
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int tpm2_init_space(struct tpm_space *space, unsigned int buf_size);
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void tpm2_del_space(struct tpm_chip *chip, struct tpm_space *space);
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void tpm2_flush_space(struct tpm_chip *chip);
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int tpm2_prepare_space(struct tpm_chip *chip, struct tpm_space *space, u8 *cmd,
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size_t cmdsiz);
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int tpm2_commit_space(struct tpm_chip *chip, struct tpm_space *space, void *buf,
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size_t *bufsiz);
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void tpm_bios_log_setup(struct tpm_chip *chip);
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void tpm_bios_log_teardown(struct tpm_chip *chip);
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int tpm_dev_common_init(void);
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void tpm_dev_common_exit(void);
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#endif
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