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lib/tpm-utils.h
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/* 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) |
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/* 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) |
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/** |
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* 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 */ |
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u32 tpm_sendrecv_command(struct udevice *dev, const void *command, void *response, size_t *size_ptr); |
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#endif /* __TPM_UTILS_H */ |