/* SPDX-License-Identifier: GPL-2.0-only */ /* * Copyright (C) 2004 IBM Corporation * Copyright (C) 2015 Intel Corporation * * Authors: * Leendert van Doorn <[email protected]> * Dave Safford <[email protected]> * Reiner Sailer <[email protected]> * Kylene Hall <[email protected]> * * Maintained by: <[email protected]> * * 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/cpu_device_id.h> #endif #define TPM_MINOR … #define TPM_BUFSIZE … #define TPM_NUM_DEVICES … #define TPM_RETRY … enum tpm_timeout { … }; /* TPM addresses */ enum tpm_addr { … }; #define TPM_WARN_RETRY … #define TPM_WARN_DOING_SELFTEST … #define TPM_ERR_DEACTIVATED … #define TPM_ERR_DISABLED … #define TPM_ERR_FAILEDSELFTEST … #define TPM_ERR_INVALID_POSTINIT … #define TPM_TAG_RQU_COMMAND … /* TPM2 specific constants. */ #define TPM2_SPACE_BUFFER_SIZE … struct stclear_flags_t { … } __packed; struct tpm1_version { … } __packed; struct tpm1_version2 { … } __packed; struct timeout_t { … } __packed; struct duration_t { … } __packed; struct permanent_flags_t { … } __packed; cap_t; enum tpm_capabilities { … }; enum tpm_sub_capabilities { … }; enum tpm2_pt_props { … }; /* 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 … extern const struct class tpm_class; extern const 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); int tpm_class_shutdown(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_bootstrap(struct tpm_chip *chip); 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); int tpm2_save_context(struct tpm_chip *chip, u32 handle, u8 *buf, unsigned int buf_size, unsigned int *offset); int tpm2_load_context(struct tpm_chip *chip, u8 *buf, unsigned int *offset, u32 *handle); 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); #ifdef CONFIG_TCG_TPM2_HMAC int tpm2_sessions_init(struct tpm_chip *chip); #else static inline int tpm2_sessions_init(struct tpm_chip *chip) { return 0; } #endif #endif
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