85 lines
2.6 KiB
C
85 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 */
|