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abdc7b8a2d
At present many TPM calls assume there is only one TPM in the system and look up this TPM themselves. This is inconsistent with driver model, which expects all driver methods to have a device parameter. Update the code to correct this. Signed-off-by: Simon Glass <sjg@chromium.org>
85 lines
2.6 KiB
C
85 lines
2.6 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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/* To make strings of commands more easily */
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#define __MSB(x) ((x) >> 8)
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#define __LSB(x) ((x) & 0xFF)
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#define tpm_u16(x) __MSB(x), __LSB(x)
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#define tpm_u32(x) tpm_u16((x) >> 16), tpm_u16((x) & 0xFFFF)
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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(struct udevice *dev, const void *command,
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void *response, size_t *size_ptr);
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#endif /* __TPM_UTILS_H */
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