crypto: crc32 - add crc32 pclmulqdq implementation and wrappers for table implementation

This patch adds crc32 algorithms to shash crypto api. One is wrapper to
gerneric crc32_le function. Second is crc32 pclmulqdq implementation. It
use hardware provided PCLMULQDQ instruction to accelerate the CRC32 disposal.
This instruction present from Intel Westmere and AMD Bulldozer CPUs.

For intel core i5 I got 450MB/s for table implementation and 2100MB/s
for pclmulqdq implementation.

Signed-off-by: Alexander Boyko <alexander_boyko@xyratex.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 21 insertions, 0 deletions

diff --git a/crypto/Kconfig b/crypto/Kconfig
index 4641d95651d3..e8b51e068179 100644
--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -355,6 +355,27 @@ config CRYPTO_CRC32C_SPARC64
           CRC32c CRC algorithm implemented using sparc64 crypto instructions,
           when available.
 
+config CRYPTO_CRC32
+        tristate "CRC32 CRC algorithm"
+        select CRYPTO_HASH
+        select CRC32
+        help
+          CRC-32-IEEE 802.3 cyclic redundancy-check algorithm.
+          Shash crypto api wrappers to crc32_le function.
+
+config CRYPTO_CRC32_PCLMUL
+        tristate "CRC32 PCLMULQDQ hardware acceleration"
+        depends on X86
+        select CRYPTO_HASH
+        select CRC32
+        help
+          From Intel Westmere and AMD Bulldozer processor with SSE4.2
+          and PCLMULQDQ supported, the processor will support
+          CRC32 PCLMULQDQ implementation using hardware accelerated PCLMULQDQ
+          instruction. This option will create 'crc32-plcmul' module,
+          which will enable any routine to use the CRC-32-IEEE 802.3 checksum
+          and gain better performance as compared with the table implementation.
+
 config CRYPTO_GHASH
         tristate "GHASH digest algorithm"
         select CRYPTO_GF128MUL