drivers/firmware/google/vpd_decode.h

Source file repositories/reference/linux-study-clean/drivers/firmware/google/vpd_decode.h

File Facts

System
Linux kernel
Corpus path
drivers/firmware/google/vpd_decode.h
Extension
.h
Size
1197 bytes
Lines
51
Domain
Driver Families
Bucket
drivers/firmware
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

#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 */

Annotation

Implementation Notes