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authorKeith Busch <kbusch@kernel.org>2022-03-03 23:13:09 +0300
committerJens Axboe <axboe@kernel.dk>2022-03-07 22:48:35 +0300
commitcbc0a40e17da361a2ada8d669413ccfbd2028f2d (patch)
tree121a5f6ee13d4e8b8e4d328cd1494c9ccdba59c9 /include/linux/crc64.h
parent7ee8809df990d1de379002973baee1681e8d7dd3 (diff)
downloadlinux-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.h2
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 */