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ENA(4)                       Device Drivers 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
     processing by providing multiple Tx/Rx queue pairs (the maximum number is
     advertised by the device via the Admin Queue), a dedicated MSI-X
     interrupt vector per Tx/Rx queue pair, and CPU cacheline optimized data

     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 8.99.34                 December 1, 2018                 NetBSD 8.99.34