11. NXP DPAA CAAM (DPAA_SEC)
The DPAA_SEC PMD provides poll mode crypto driver support for NXP DPAA CAAM hardware accelerator.
SEC is the SOC’s security engine, which serves as NXP’s latest cryptographic acceleration and offloading hardware. It combines functions previously implemented in separate modules to create a modular and scalable acceleration and assurance engine. It also implements block encryption algorithms, stream cipher algorithms, hashing algorithms, public key algorithms, run-time integrity checking, and a hardware random number generator. SEC performs higher-level cryptographic operations than previous NXP cryptographic accelerators. This provides significant improvement to system level performance.
DPAA_SEC is one of the hardware resource in DPAA Architecture. More information on DPAA Architecture is described in DPAA Overview.
DPAA_SEC PMD is one of DPAA drivers which interacts with QBMAN to create, configure and destroy the device instance using queue pair with CAAM portal.
DPAA_SEC PMD also uses some of the other hardware resources like buffer pools, queues, queue portals to store and to enqueue/dequeue data to the hardware SEC.
SEC provides platform assurance by working with SecMon, which is a companion logic block that tracks the security state of the SOC. SEC is programmed by means of descriptors (not to be confused with frame descriptors (FDs)) that indicate the operations to be performed and link to the message and associated data. SEC incorporates two DMA engines to fetch the descriptors, read the message data, and write the results of the operations. The DMA engine provides a scatter/gather capability so that SEC can read and write data scattered in memory. SEC may be configured by means of software for dynamic changes in byte ordering. The default configuration for this version of SEC is little-endian mode.
The DPAA PMD has support for:
11.4. Supported DPAA SoCs
11.5. Allowing & Blocking
For blocking a DPAA device, following commands can be used.
<dpdk app> <EAL args> -b "dpaa:dpaa_sec-X" -- ... e.g. "dpaa:dpaa_sec-1" or to disable all 4 SEC devices -b "dpaa:dpaa_sec-1" -b "dpaa:dpaa_sec-2" -b "dpaa:dpaa_sec-3" -b "dpaa:dpaa_sec-4"
- Hash followed by Cipher mode is not supported
- Only supports the session-oriented API implementation (session-less APIs are not supported).
DPAA_SEC driver has similar pre-requisites as described in DPAA Overview.
See NXP QorIQ DPAA Board Support Package for setup information
- Follow the DPDK Getting Started Guide for Linux to setup the basic DPDK environment.
11.8. Enabling logs
For enabling logs, use the following EAL parameter:
./your_crypto_application <EAL args> --log-level=pmd.crypto.dpaa:<level>
pmd.crypto.dpaa as log matching criteria, all Crypto PMD logs can be
enabled which are lower than logging
11.9. Enabling debug prints
Use dev arg option
drv_dump_mode=x to dump useful debug prints on HW sec
error. There are 3 dump modes available 0, 1 and 2. Mode 0 means no dump print
on error, mode 1 means dump HW error code and mode 2 means dump HW error code
along with other useful debugging information like session, queue, descriptor