CRC

Hardware CRC acceleration used by CRC. More...

Functions
size_t	pbl_crc_hw_crc32 (uint32_t *crc, const void *data, size_t len)
	Accelerated CRC-32/ISO-HDLC.
size_t	pbl_crc_hw_crc32_legacy (uint32_t *reg, const void *data, size_t len)
	Accelerated legacy checksum.

Detailed Description

Hardware CRC acceleration used by CRC.

Provided by drivers that select CRC_HW_ACCEL.

Each function processes a prefix of the data, a whole number of 32-bit words, and returns its length in bytes. It returns 0 without touching the running value when the hardware cannot take the request; the CRC subsystem computes whatever is left in software.

Function Documentation

pbl_crc_hw_crc32()

size_t pbl_crc_hw_crc32	(	uint32_t *	crc,
		const void *	data,
		size_t	len
	)

Accelerated CRC-32/ISO-HDLC.

Parameters

[in,out]	crc	Running CRC-32/ISO-HDLC value, as passed to pbl_crc32().
	data	Data to process.
	len	Length of data in bytes.

Returns

Number of bytes processed, a multiple of 4.

pbl_crc_hw_crc32_legacy()

size_t pbl_crc_hw_crc32_legacy	(	uint32_t *	reg,
		const void *	data,
		size_t	len
	)

Accelerated legacy checksum.

Parameters

[in,out]	reg	Running legacy checksum register, see struct pbl_crc32_legacy.
	data	Data to process, as little-endian 32-bit words.
	len	Length of data in bytes.

Returns

Number of bytes processed, a multiple of 4.