d677bfe2f7
There are no changes in this commit but a new organization of the code
as follow.
* cmd/ directory:
> move existing code from cmd/tpm.c in cmd/tpm-common.c
> move specific code in cmd/tpm-v1.c
> create a specific header file with generic definitions for
commands only called cmd/tpm-user-utils.h
* lib/ directory:
> move existing code from lib/tpm.c in lib/tpm-common.c
> move specific code in lib/tpm-v1.c
> create a specific header file with generic definitions for
the library itself called lib/tpm-utils.h
* include/ directory:
> move existing code from include/tpm.h in include/tpm-common.h
> move specific code in include/tpm-v1.h
Code designated as 'common' is compiled if TPM are used. Code designated
as 'specific' is compiled only if the right specification has been
selected.
All files include tpm-common.h.
Files in cmd/ include tpm-user-utils.h.
Files in lib/ include tpm-utils.h.
Depending on the specification, files may include either (not both)
tpm-v1.h or tpm-v2.h.
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
[trini: Fix a few more cases of tpm.h -> tpm-v1.h, some Kconfig logic]
Signed-off-by: Tom Rini <trini@konsulko.com>
95 lines
2.8 KiB
C
95 lines
2.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* Copyright (c) 2013 The Chromium OS Authors.
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* Coypright (c) 2013 Guntermann & Drunck GmbH
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*/
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#ifndef __TPM_UTILS_H
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#define __TPM_UTILS_H
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#define COMMAND_BUFFER_SIZE 256
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/* Internal error of TPM command library */
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#define TPM_LIB_ERROR ((u32)~0u)
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/**
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* tpm_open() - Request access to locality 0 for the caller
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*
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* After all commands have been completed the caller is supposed to
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* call tpm_close().
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*
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* Returns 0 on success, -ve on failure.
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*/
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int tpm_open(struct udevice *dev);
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/**
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* tpm_close() - Close the current session
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*
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* Releasing the locked locality. Returns 0 on success, -ve 1 on
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* failure (in case lock removal did not succeed).
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*/
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int tpm_close(struct udevice *dev);
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/**
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* Pack data into a byte string. The data types are specified in
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* the format string: 'b' means unsigned byte, 'w' unsigned word,
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* 'd' unsigned double word, and 's' byte string. The data are a
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* series of offsets and values (for type byte string there are also
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* lengths). The data values are packed into the byte string
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* sequentially, and so a latter value could over-write a former
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* value.
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*
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* @param str output string
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* @param size size of output string
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* @param format format string
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* @param ... data points
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* @return 0 on success, non-0 on error
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*/
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int pack_byte_string(u8 *str, size_t size, const char *format, ...);
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/**
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* Unpack data from a byte string. The data types are specified in
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* the format string: 'b' means unsigned byte, 'w' unsigned word,
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* 'd' unsigned double word, and 's' byte string. The data are a
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* series of offsets and pointers (for type byte string there are also
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* lengths).
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*
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* @param str output string
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* @param size size of output string
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* @param format format string
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* @param ... data points
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* @return 0 on success, non-0 on error
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*/
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int unpack_byte_string(const u8 *str, size_t size, const char *format, ...);
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/**
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* Get TPM command size.
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*
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* @param command byte string of TPM command
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* @return command size of the TPM command
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*/
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u32 tpm_command_size(const void *command);
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/**
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* Get TPM response return code, which is one of TPM_RESULT values.
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*
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* @param response byte string of TPM response
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* @return return code of the TPM response
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*/
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u32 tpm_return_code(const void *response);
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/**
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* Send a TPM command and return response's return code, and optionally
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* return response to caller.
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*
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* @param command byte string of TPM command
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* @param response output buffer for TPM response, or NULL if the
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* caller does not care about it
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* @param size_ptr output buffer size (input parameter) and TPM
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* response length (output parameter); this parameter
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* is a bidirectional
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* @return return code of the TPM response
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*/
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u32 tpm_sendrecv_command(const void *command, void *response, size_t *size_ptr);
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#endif /* __TPM_UTILS_H */
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