u-boot/lib/tpm-utils.h
Heinrich Schuchardt 185f812c41 doc: replace @return by Return:
Sphinx expects Return: and not @return to indicate a return value.

find . -name '*.c' -exec \
sed -i 's/^\(\s\)\*\(\s*\)@return\(\s\)/\1*\2Return:\3/' {} \;

find . -name '*.h' -exec \
sed -i 's/^\(\s\)\*\(\s*\)@return\(\s\)/\1*\2Return:\3/' {} \;

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
2022-01-19 18:11:34 +01:00

84 lines
2.6 KiB
C

/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Copyright (c) 2013 The Chromium OS Authors.
* Coypright (c) 2013 Guntermann & Drunck GmbH
*/
#ifndef __TPM_UTILS_H
#define __TPM_UTILS_H
#define COMMAND_BUFFER_SIZE 256
/* Internal error of TPM command library */
#define TPM_LIB_ERROR ((u32)~0u)
/* To make strings of commands more easily */
#define __MSB(x) ((x) >> 8)
#define __LSB(x) ((x) & 0xFF)
#define tpm_u16(x) __MSB(x), __LSB(x)
#define tpm_u32(x) tpm_u16((x) >> 16), tpm_u16((x) & 0xFFFF)
/**
* Pack data into a byte string. The data types are specified in
* the format string: 'b' means unsigned byte, 'w' unsigned word,
* 'd' unsigned double word, and 's' byte string. The data are a
* series of offsets and values (for type byte string there are also
* lengths). The data values are packed into the byte string
* sequentially, and so a latter value could over-write a former
* value.
*
* @param str output string
* @param size size of output string
* @param format format string
* @param ... data points
* Return: 0 on success, non-0 on error
*/
int pack_byte_string(u8 *str, size_t size, const char *format, ...);
/**
* Unpack data from a byte string. The data types are specified in
* the format string: 'b' means unsigned byte, 'w' unsigned word,
* 'd' unsigned double word, and 's' byte string. The data are a
* series of offsets and pointers (for type byte string there are also
* lengths).
*
* @param str output string
* @param size size of output string
* @param format format string
* @param ... data points
* Return: 0 on success, non-0 on error
*/
int unpack_byte_string(const u8 *str, size_t size, const char *format, ...);
/**
* Get TPM command size.
*
* @param command byte string of TPM command
* Return: command size of the TPM command
*/
u32 tpm_command_size(const void *command);
/**
* Get TPM response return code, which is one of TPM_RESULT values.
*
* @param response byte string of TPM response
* Return: return code of the TPM response
*/
u32 tpm_return_code(const void *response);
/**
* Send a TPM command and return response's return code, and optionally
* return response to caller.
*
* @param command byte string of TPM command
* @param response output buffer for TPM response, or NULL if the
* caller does not care about it
* @param size_ptr output buffer size (input parameter) and TPM
* response length (output parameter); this parameter
* is a bidirectional
* Return: return code of the TPM response
*/
u32 tpm_sendrecv_command(struct udevice *dev, const void *command,
void *response, size_t *size_ptr);
#endif /* __TPM_UTILS_H */