[dpdk-dev] [PATCH v3 0/8] Add crypto PMD optimized for ARMv8

Zbigniew Bodek zbigniew.bodek at caviumnetworks.com
Fri Jan 13 19:59:26 CET 2017


Hello Hemant,

Thank you for your remarks and comments. Please check my answer below.

Kind regards
Zbigniew

On 13.01.2017 09:07, Hemant Agrawal wrote:
> On 1/4/2017 11:03 PM, zbigniew.bodek at caviumnetworks.com wrote:
>> From: Zbigniew Bodek <zbigniew.bodek at caviumnetworks.com>
>>
>> Introduce crypto poll mode driver using ARMv8
>> cryptographic extensions. This PMD is optimized
>> to provide performance boost for chained
>> crypto operations processing, such as:
>> * encryption + HMAC generation
>> * decryption + HMAC validation.
>> In particular, cipher only or hash only
>> operations are not provided.
>
> Do you have a plan to add the crypto only, auth/hash only support into
> this driver?

OpenSSL driver is already implementing that and it is optimized for ARMv8.

> Also, do you plan to add additional cases w.r.t supported by other
> crypto driver?

We may do it in the future but this depends on our resource availability.

>
>> Performance gain can be observed in tests
>> against OpenSSL PMD which also uses ARM
>> crypto extensions for packets processing.
>>
>> Exemplary crypto performance tests comparison:
>>
>> cipher_hash. cipher algo: AES_CBC
>> auth algo: SHA1_HMAC cipher key size=16.
>> burst_size: 64 ops
>>
>> ARMv8 PMD improvement over OpenSSL PMD
>> (Optimized for ARMv8 cipher only and hash
>> only cases):
>>
>> Buffer
>> Size(B)   OPS(M)      Throughput(Gbps)
>> 64        729 %        742 %
>> 128       577 %        592 %
>> 256       483 %        476 %
>> 512       336 %        351 %
>> 768       300 %        286 %
>> 1024      263 %        250 %
>> 1280      225 %        229 %
>> 1536      214 %        213 %
>> 1792      186 %        203 %
>> 2048      200 %        193 %
>>
>> The driver currently supports AES-128-CBC
>> in combination with: SHA256 HMAC and SHA1 HMAC.
>> The core crypto functionality of this driver is
>> provided by the external armv8_crypto library
>> that can be downloaded from the Cavium repository:
>> https://github.com/caviumnetworks/armv8_crypto
>>
>> CPU compatibility with this virtual device
>> is detected in run-time and virtual crypto
>> device will not be created if CPU doesn't
>> provide AES, SHA1, SHA2 and NEON.
>>
>> The functionality and performance of this
>> code can be tested using generic test application
>> with the following commands:
>> * cryptodev_sw_armv8_autotest
>> * cryptodev_sw_armv8_perftest
>> New test vectors and cases have been added
>> to the general pool. In particular SHA1 and
>> SHA256 HMAC for short cases were introduced.
>> This is because low-level ARM assembly code
>> is using different code paths for long and
>> short data sets, so in order to test the
>> mentioned driver correctly, two different
>> data sets need to be provided.
>>
>> ---
>> v3:
>> * Addressed review remarks
>> * Moved low-level assembly code to the external library
>> * Removed SHA256 MAC cases
>> * Various fixes: interface to the library, digest destination
>>   and source address interpreting, missing mbuf manipulations.
>>
>> v2:
>> * Fixed checkpatch warnings
>> * Divide patches into smaller logical parts
>>
>> Zbigniew Bodek (8):
>>   mk: fix build of assembly files for ARM64
>>   lib: add cryptodev type for the upcoming ARMv8 PMD
>>   crypto/armv8: add PMD optimized for ARMv8 processors
>>   mk/crypto/armv8: add PMD to the build system
>>   doc/armv8: update documentation about crypto PMD
>>   crypto/armv8: enable ARMv8 PMD in the configuration
>>   crypto/armv8: update MAINTAINERS entry for ARMv8 crypto
>>   app/test: add ARMv8 crypto tests and test vectors
>>
>>  MAINTAINERS                                    |   6 +
>>  app/test/test_cryptodev.c                      |  63 ++
>>  app/test/test_cryptodev_aes_test_vectors.h     | 144 +++-
>>  app/test/test_cryptodev_blockcipher.c          |   4 +
>>  app/test/test_cryptodev_blockcipher.h          |   1 +
>>  app/test/test_cryptodev_perf.c                 | 480 +++++++++++++
>>  config/common_base                             |   6 +
>>  doc/guides/cryptodevs/armv8.rst                |  96 +++
>>  doc/guides/cryptodevs/index.rst                |   1 +
>>  doc/guides/rel_notes/release_17_02.rst         |   5 +
>>  drivers/crypto/Makefile                        |   1 +
>>  drivers/crypto/armv8/Makefile                  |  73 ++
>>  drivers/crypto/armv8/rte_armv8_pmd.c           | 926
>> +++++++++++++++++++++++++
>>  drivers/crypto/armv8/rte_armv8_pmd_ops.c       | 369 ++++++++++
>>  drivers/crypto/armv8/rte_armv8_pmd_private.h   | 211 ++++++
>>  drivers/crypto/armv8/rte_armv8_pmd_version.map |   3 +
>>  lib/librte_cryptodev/rte_cryptodev.h           |   3 +
>>  mk/arch/arm64/rte.vars.mk                      |   1 -
>>  mk/rte.app.mk                                  |   2 +
>>  mk/toolchain/gcc/rte.vars.mk                   |   6 +-
>>  20 files changed, 2390 insertions(+), 11 deletions(-)
>>  create mode 100644 doc/guides/cryptodevs/armv8.rst
>>  create mode 100644 drivers/crypto/armv8/Makefile
>>  create mode 100644 drivers/crypto/armv8/rte_armv8_pmd.c
>>  create mode 100644 drivers/crypto/armv8/rte_armv8_pmd_ops.c
>>  create mode 100644 drivers/crypto/armv8/rte_armv8_pmd_private.h
>>  create mode 100644 drivers/crypto/armv8/rte_armv8_pmd_version.map
>>
>
>


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