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| author | Keith Busch <kbusch@kernel.org> | 2022-03-03 23:13:09 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2022-03-07 22:48:35 +0300 |
| commit | cbc0a40e17da361a2ada8d669413ccfbd2028f2d (patch) | |
| tree | 121a5f6ee13d4e8b8e4d328cd1494c9ccdba59c9 /include/linux/crc64.h | |
| parent | 7ee8809df990d1de379002973baee1681e8d7dd3 (diff) | |
| download | linux-cbc0a40e17da361a2ada8d669413ccfbd2028f2d.tar.xz | |
lib: add rocksoft model crc64
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>
Diffstat (limited to 'include/linux/crc64.h')
| -rw-r--r-- | include/linux/crc64.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/crc64.h b/include/linux/crc64.h index c756e65a1b58..9480f38cc7cf 100644 --- a/include/linux/crc64.h +++ b/include/linux/crc64.h @@ -8,4 +8,6 @@ #include <linux/types.h> u64 __pure crc64_be(u64 crc, const void *p, size_t len); +u64 __pure crc64_rocksoft_generic(u64 crc, const void *p, size_t len); + #endif /* _LINUX_CRC64_H */ |