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Commit c2afad6c authored by Kamil Konieczny's avatar Kamil Konieczny Committed by Herbert Xu
Browse files

crypto: s5p-sss - Add HASH support for Exynos 



Add support for MD5, SHA1, SHA256 hash algorithms for Exynos HW.
It uses the crypto framework asynchronous hash api.
It is based on omap-sham.c driver.
S5P has some HW differencies and is not implemented.

Modifications in s5p-sss:

- Add hash supporting structures and functions.

- Modify irq handler to handle both aes and hash signals.

- Resize resource end in probe if EXYNOS_HASH is enabled in
  Kconfig.

- Add new copyright line and new author.

- Tested on Odroid-U3 with Exynos 4412 CPU, kernel 4.13-rc6
  with crypto run-time self test testmgr
  and with tcrypt module with: modprobe tcrypt sec=1 mode=N
  where N=402, 403, 404 (MD5, SHA1, SHA256).

Modifications in drivers/crypto/Kconfig:

- Add new CRYPTO_DEV_EXYNOS_HASH, depend on !EXYNOS_RNG
  and CRYPTO_DEV_S5P

- Select sw algorithms MD5, SHA1 and SHA256 in EXYNOS_HASH
  as they are needed for fallback.

Acked-by: default avatarVladimir Zapolskiy <vz@mleia.com>
Reviewed-by: default avatarKrzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: default avatarKamil Konieczny <k.konieczny@partner.samsung.com>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent e5e40908

drivers/crypto/Kconfig

+14 −0
Original line number Diff line number Diff line
@@ -427,6 +427,20 @@ config CRYPTO_DEV_S5P 
	  Select this to offload Samsung S5PV210 or S5PC110, Exynos from AES

	  algorithms execution.



config CRYPTO_DEV_EXYNOS_HASH

	bool "Support for Samsung Exynos HASH accelerator"

	depends on CRYPTO_DEV_S5P

	depends on !CRYPTO_DEV_EXYNOS_RNG && CRYPTO_DEV_EXYNOS_RNG!=m

	select CRYPTO_SHA1

	select CRYPTO_MD5

	select CRYPTO_SHA256

	help

	  Select this to offload Exynos from HASH MD5/SHA1/SHA256.

	  This will select software SHA1, MD5 and SHA256 as they are

	  needed for small and zero-size messages.

	  HASH algorithms will be disabled if EXYNOS_RNG

	  is enabled due to hw conflict.



config CRYPTO_DEV_NX

	bool "Support for IBM PowerPC Nest (NX) cryptographic acceleration"

	depends on PPC64

drivers/crypto/s5p-sss.c

+1396 −10

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