ena(4) - NetBSD Manual Pages

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ENA(4)                  NetBSD Kernel Interfaces Manual                 ENA(4)

ena -- NetBSD kernel driver for Elastic Network Adapter (ENA) family
ena* at pci? dev ? function ?
The ENA is a networking interface designed to make good use of modern CPU features and system architectures. The ENA device exposes a lightweight management interface with a minimal set of memory mapped registers and extendable command set through an Admin Queue. The driver supports a range of ENA devices, is link-speed independent (i.e., the same driver is used for 10GbE, 25GbE, 40GbE, etc.), and has a negotiated and extendable feature set. Some ENA devices support SR-IOV. This driver is used for both the SR-IOV Physical Function (PF) and Virtual Function (VF) devices. The ENA devices enable high speed and low overhead network traffic pro- cessing by providing multiple Tx/Rx queue pairs (the maximum number is advertised by the device via the Admin Queue), a dedicated MSI-X inter- rupt vector per Tx/Rx queue pair, and CPU cacheline optimized data place- ment. The ena driver supports industry standard TCP/IP offload features such as checksum offload and TCP transmit segmentation offload (TSO). Receive- side scaling (RSS) is supported for multi-core scaling. The ena driver and its corresponding devices implement health monitoring mechanisms such as watchdog, enabling the device and driver to recover in a manner transparent to the application, as well as debug logs. Some of the ENA devices support a working mode called Low-latency Queue (LLQ), which saves several more microseconds. This feature might be implemented for the driver in future releases.
Supported PCI vendor ID/device IDs: 1d0f:0ec2 - ENA PF 1d0f:1ec2 - ENA PF with LLQ support 1d0f:ec20 - ENA VF 1d0f:ec21 - ENA VF with LLQ support
arp(4), ifmedia(4), netintro(4), pci(4), ifconfig(8)
The ena driver was originally written by Semihalf for FreeBSD. The driver was ported to NetBSD by Jared D. McNeill <jmcneill@NetBSD.org>. NetBSD 9.99 December 1, 2018 NetBSD 9.99
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