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