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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* vpd_decode.h
*
* Google VPD decoding routines.
*
* Copyright 2017 Google Inc.
*/
#ifndef __VPD_DECODE_H
#define __VPD_DECODE_H
#include <linux/types.h>
enum {
VPD_OK = 0,
VPD_FAIL,
};
enum {
VPD_TYPE_TERMINATOR = 0,
VPD_TYPE_STRING,
VPD_TYPE_INFO = 0xfe,
VPD_TYPE_IMPLICIT_TERMINATOR = 0xff,
};
/* Callback for vpd_decode_string to invoke. */
typedef int vpd_decode_callback(const u8 *key, u32 key_len,
const u8 *value, u32 value_len,
void *arg);
/*
* vpd_decode_string
*
* Given the encoded string, this function invokes callback with extracted
* (key, value). The *consumed will be plused the number of bytes consumed in
* this function.
*
* The input_buf points to the first byte of the input buffer.
*
* The *consumed starts from 0, which is actually the next byte to be decoded.
* It can be non-zero to be used in multiple calls.
*
* If one entry is successfully decoded, sends it to callback and returns the
* result.
*/
int vpd_decode_string(const u32 max_len, const u8 *input_buf, u32 *consumed,
vpd_decode_callback callback, void *callback_arg);
#endif /* __VPD_DECODE_H */
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