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crypto: powerpc - Add CRC-T10DIF acceleration

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T10DIF is a CRC16 used heavily in NVMe.

It turns out we can accelerate it with a CRC32 library and a few
little tricks.

Provide the accelerator based the refactored CRC32 code.

Cc: Anton Blanchard <[email protected]>
Thanks-to: Hong Bo Peng <[email protected]>
Signed-off-by: Daniel Axtens <[email protected]>
Signed-off-by: Herbert Xu <[email protected]>
This commit is contained in:
Daniel Axtens 2017-03-15 23:37:36 +11:00 • committed by Herbert Xu
commit b01df1c16c
4 changed files with 986 additions and 0 deletions
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9
crypto/Kconfig
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@ -513,6 +513,15 @@ config CRYPTO_CRCT10DIF_PCLMUL
'crct10dif-plcmul' module, which is faster when computing the
crct10dif checksum as compared with the generic table implementation.
config CRYPTO_CRCT10DIF_VPMSUM
tristate "CRC32T10DIF powerpc64 hardware acceleration"
depends on PPC64 && ALTIVEC && CRC_T10DIF
select CRYPTO_HASH
help
CRC10T10DIF algorithm implemented using vector polynomial
multiply-sum (vpmsum) instructions, introduced in POWER8. Enable on
POWER8 and newer processors for improved performance.
config CRYPTO_GHASH
tristate "GHASH digest algorithm"
select CRYPTO_GF128MUL