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cbc0a40e17
The NVM Express specification extended data integrity fields to 64 bits
using the Rocksoft parameters. Add the poly to the crc64 table
generation, and provide a generic library routine implementing the
algorithm.
The Rocksoft 64-bit CRC model parameters are as follows:
Poly: 0xAD93D23594C93659
Initial value: 0xFFFFFFFFFFFFFFFF
Reflected Input: True
Reflected Output: True
Xor Final: 0xFFFFFFFFFFFFFFFF
Since this model used reflected bits, the implementation generates the
reflected table so the result is ordered consistently.
Cc: Christoph Hellwig <hch@lst.de>
Cc: Hannes Reinecke <hare@suse.de>
Cc: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Link: https://lore.kernel.org/r/20220303201312.3255347-6-kbusch@kernel.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
14 lines
352 B
C
14 lines
352 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* See lib/crc64.c for the related specification and polynomial arithmetic.
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*/
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#ifndef _LINUX_CRC64_H
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#define _LINUX_CRC64_H
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#include <linux/types.h>
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u64 __pure crc64_be(u64 crc, const void *p, size_t len);
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u64 __pure crc64_rocksoft_generic(u64 crc, const void *p, size_t len);
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#endif /* _LINUX_CRC64_H */
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