5. Broadcom FlexSparc Crypto Poll Mode Driver

The FlexSparc crypto poll mode driver (BCMFS PMD) provides support for offloading cryptographic operations to the Broadcom SoCs having FlexSparc4 unit. Detailed information about SoCs can be found at Broadcom Official Website.

5.1. Supported Broadcom SoCs

  • Stingray

5.2. Features

The BCMFS PMD has support for below symmetric algorithms:

Cipher algorithms:

  • RTE_CRYPTO_CIPHER_3DES_CBC
  • RTE_CRYPTO_CIPHER_3DES_CTR
  • RTE_CRYPTO_CIPHER_AES128_CBC
  • RTE_CRYPTO_CIPHER_AES192_CBC
  • RTE_CRYPTO_CIPHER_AES256_CBC
  • RTE_CRYPTO_CIPHER_AES128_CTR
  • RTE_CRYPTO_CIPHER_AES192_CTR
  • RTE_CRYPTO_CIPHER_AES256_CTR
  • RTE_CRYPTO_CIPHER_AES_XTS
  • RTE_CRYPTO_CIPHER_DES_CBC

Hash algorithms:

  • RTE_CRYPTO_AUTH_SHA1
  • RTE_CRYPTO_AUTH_SHA1_HMAC
  • RTE_CRYPTO_AUTH_SHA224
  • RTE_CRYPTO_AUTH_SHA224_HMAC
  • RTE_CRYPTO_AUTH_SHA256
  • RTE_CRYPTO_AUTH_SHA256_HMAC
  • RTE_CRYPTO_AUTH_SHA384
  • RTE_CRYPTO_AUTH_SHA384_HMAC
  • RTE_CRYPTO_AUTH_SHA512
  • RTE_CRYPTO_AUTH_SHA512_HMAC
  • RTE_CRYPTO_AUTH_AES_XCBC_MAC
  • RTE_CRYPTO_AUTH_MD5_HMAC
  • RTE_CRYPTO_AUTH_AES_GMAC
  • RTE_CRYPTO_AUTH_AES_CMAC

Supported AEAD algorithms:

  • RTE_CRYPTO_AEAD_AES_GCM

5.3. Installation

Information about kernel, rootfs and toolchain can be found at Broadcom Official Website.

Note

To execute BCMFS PMD, it must be compiled with VFIO_PRESENT flag on the compiling platform and same gets enabled in rte_vfio.h.

The BCMFS PMD may be compiled natively on a Stingray platform or cross-compiled on an x86 platform. For example, below commands can be executed for cross compiling on x86 platform.

cd <DPDK-source-directory>
meson <dest-dir> --cross-file config/arm/arm64_stingray_linux_gcc
cd <dest-dir>
ninja

5.4. Initialization

The supported platform devices should be present in the /sys/bus/platform/devices/fs<version>/<dev_name> path on the booted kernel. To get BCMFS PMD executing, device node must be owned by VFIO platform module only. For example, below commands can be run to get hold of a device node by VFIO.

SETUP_SYSFS_DEV_NAME=67000000.crypto_mbox
io_device_name="vfio-platform"
echo $io_device_name > /sys/bus/platform/devices/${SETUP_SYSFS_DEV_NAME}/driver_override
echo ${SETUP_SYSFS_DEV_NAME} > /sys/bus/platform/drivers_probe

5.5. Limitations

  • The session-oriented APIs are supported but the session-less APIs are not.
  • CCM is not supported.

5.6. Testing

The symmetric crypto operations on BCMFS PMD may be verified by running the test application:

./dpdk-test
RTE>>cryptodev_bcmfs_autotest