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net: ena: Add more documentation for RX copybreak

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This patch contains more details about the functionality
of RX copybreak.

Signed-off-by: Shay Agroskin <shayagr@amazon.com>
Signed-off-by: David Arinzon <darinzon@amazon.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
This commit is contained in:
David Arinzon 2024-01-30 09:53:44 +00:00 committed by Paolo Abeni
parent 0def8a15da
commit bd765cc910
1 changed files with 6 additions and 0 deletions
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6
Documentation/networking/device_drivers/ethernet/amazon/ena.rst
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@ -211,10 +211,16 @@ Documentation/networking/net_dim.rst
RX copybreak
============
The rx_copybreak is initialized by default to ENA_DEFAULT_RX_COPYBREAK
and can be configured by the ETHTOOL_STUNABLE command of the
SIOCETHTOOL ioctl.
This option controls the maximum packet length for which the RX
descriptor it was received on would be recycled. When a packet smaller
than RX copybreak bytes is received, it is copied into a new memory
buffer and the RX descriptor is returned to HW.
Statistics
==========