86 lines
1.9 KiB
C
86 lines
1.9 KiB
C
// SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
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/* Copyright 2013-2018 IBM Corp. */
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#ifndef __TPM_H
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#define __TPM_H
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#include <device.h>
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#include <eventlib.h>
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#include <tss2/eventlog.h>
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#include <tss2/tssskiboot.h>
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struct tpm_dev {
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/* TPM bus id */
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int bus_id;
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/* TPM address in the bus */
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int i2c_addr;
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};
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struct tpm_driver {
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/* Driver name */
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const char* name;
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/* Transmit the TPM command stored in buf to the tpm device */
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int (*transmit)(struct tpm_dev *dev, uint8_t* buf, size_t cmdlen,
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size_t *buflen);
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};
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struct tpm_chip {
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/* TPM chip id */
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int id;
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/* Indicates whether or not the device and log are functional */
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bool enabled;
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/* TPM device tree node */
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struct dt_node *node;
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/* Event log handler */
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struct _TpmLogMgr logmgr;
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/* TPM device handler */
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struct tpm_dev *dev;
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/* TPM driver handler */
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struct tpm_driver *driver;
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struct list_node link;
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};
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void tss_tpm_register(struct tpm_dev *dev, struct tpm_driver *driver);
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void tss_tpm_unregister(void);
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struct tpm_dev* tpm_get_device(void);
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struct tpm_driver* tpm_get_driver(void);
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/*
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* Register a tpm chip by binding the driver to dev.
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* Event log is also registered by this function.
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*/
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extern int tpm_register_chip(struct dt_node *node, struct tpm_dev *dev,
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struct tpm_driver *driver);
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/*
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* tpm_extendl - For each TPM device, this extends the sha1 and sha 256 digests
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* to the indicated PCR and also records an event for the same PCR
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* in the event log
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* This calls a TSS extend function that supports multibank. Both sha1 and
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* sha256 digests are extended in a single operation sent to the TPM device.
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*/
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int tpm_extendl(TPMI_DH_PCR pcr,
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TPMI_ALG_HASH alg1, uint8_t *digest1,
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TPMI_ALG_HASH alg2, uint8_t *digest2,
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uint32_t event_type, const char *event_msg,
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uint32_t event_msg_len);
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/* Add status property to the TPM devices */
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extern void tpm_add_status_property(void);
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extern int tpm_init(void);
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extern void tpm_cleanup(void);
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#endif /* __TPM_H */
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