Changes and New Features

NVIDIA BlueField-3 DPU NIC Firmware Release Notes v32.40.1000




Socket Direct Single netdev Mapped to Two PCIe Devices

Enabled Single Netdev mapping to two PCIe devices (Socket Direct).

Now multiple devices (PFs) of the same port can be combined under a single netdev instance. Traffic is passed through different devices belonging to different NUMA sockets, thus saving cross-NUMA traffic and allowing apps running on the same netdev from different NUMAs to still feel a sense of proximity to the device and achieve improved performance.

The netdev is destroyed once any of the PFs is removed. A proper configuration would utilize the correct close NUMA when working on a certain app/CPU.

Currently, this capability is limited to PFs only, and up to two devices (sockets). To enable the feature, one must configure the same Socket Direct group (non zero) for both PFs through mlxconfig SD_GROUP.


Added support for egress ACL to the uplink by adding a new bit to the Set Flow Table Entry: allow_fdb_uplink_hairpin.

Port Rate Limiting

Added a new access register (PBWS) to set the port maximum bandwidth to a value between 95% to 100%.


Added a new NVConfig parameter to force Congestion Control algorithm to be SW-DCQCN.

Bug Fixes

See Bug Fixes in this Firmware Version section.

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