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Message-ID: <20240130095353.2881-3-darinzon@amazon.com>
Date: Tue, 30 Jan 2024 09:53:44 +0000
From: <darinzon@...zon.com>
To: "Nelson, Shannon" <shannon.nelson@....com>, David Miller
<davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>,
<netdev@...r.kernel.org>
CC: David Arinzon <darinzon@...zon.com>, "Woodhouse, David" <dwmw@...zon.com>,
"Machulsky, Zorik" <zorik@...zon.com>, "Matushevsky, Alexander"
<matua@...zon.com>, Saeed Bshara <saeedb@...zon.com>, "Wilson, Matt"
<msw@...zon.com>, "Liguori, Anthony" <aliguori@...zon.com>, "Bshara, Nafea"
<nafea@...zon.com>, "Belgazal, Netanel" <netanel@...zon.com>, "Saidi, Ali"
<alisaidi@...zon.com>, "Herrenschmidt, Benjamin" <benh@...zon.com>,
"Kiyanovski, Arthur" <akiyano@...zon.com>, "Dagan, Noam" <ndagan@...zon.com>,
"Agroskin, Shay" <shayagr@...zon.com>, "Itzko, Shahar" <itzko@...zon.com>,
"Abboud, Osama" <osamaabb@...zon.com>, "Ostrovsky, Evgeny"
<evostrov@...zon.com>, "Tabachnik, Ofir" <ofirt@...zon.com>, "Koler, Nati"
<nkoler@...zon.com>
Subject: [PATCH v2 net-next 02/11] net: ena: Add more documentation for RX copybreak
From: David Arinzon <darinzon@...zon.com>
This patch contains more details about the functionality
of RX copybreak.
Signed-off-by: Shay Agroskin <shayagr@...zon.com>
Signed-off-by: David Arinzon <darinzon@...zon.com>
---
.../networking/device_drivers/ethernet/amazon/ena.rst | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/Documentation/networking/device_drivers/ethernet/amazon/ena.rst b/Documentation/networking/device_drivers/ethernet/amazon/ena.rst
index b842bcb..a4c7d0c 100644
--- a/Documentation/networking/device_drivers/ethernet/amazon/ena.rst
+++ b/Documentation/networking/device_drivers/ethernet/amazon/ena.rst
@@ -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
==========
--
2.40.1
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