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Tue, 30 Jan 2024 09:54:04 +0000 (UTC) X-Farcaster-Flow-ID: cd8a33d1-8d13-4e78-bb20-57eedcc8f9ea Received: from EX19D008UEA002.ant.amazon.com (10.252.134.125) by EX19MTAUEC001.ant.amazon.com (10.252.135.222) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.40; Tue, 30 Jan 2024 09:54:03 +0000 Received: from EX19MTAUEA001.ant.amazon.com (10.252.134.203) by EX19D008UEA002.ant.amazon.com (10.252.134.125) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.40; Tue, 30 Jan 2024 09:54:03 +0000 Received: from dev-dsk-darinzon-1c-05962a8d.eu-west-1.amazon.com (172.19.80.187) by mail-relay.amazon.com (10.252.134.102) with Microsoft SMTP Server id 15.2.1118.40 via Frontend Transport; Tue, 30 Jan 2024 09:54:01 +0000 From: To: "Nelson, Shannon" , David Miller , Jakub Kicinski , CC: David Arinzon , "Woodhouse, David" , "Machulsky, Zorik" , "Matushevsky, Alexander" , Saeed Bshara , "Wilson, Matt" , "Liguori, Anthony" , "Bshara, Nafea" , "Belgazal, Netanel" , "Saidi, Ali" , "Herrenschmidt, Benjamin" , "Kiyanovski, Arthur" , "Dagan, Noam" , "Agroskin, Shay" , "Itzko, Shahar" , "Abboud, Osama" , "Ostrovsky, Evgeny" , "Tabachnik, Ofir" , "Koler, Nati" Subject: [PATCH v2 net-next 02/11] net: ena: Add more documentation for RX copybreak Date: Tue, 30 Jan 2024 09:53:44 +0000 Message-ID: <20240130095353.2881-3-darinzon@amazon.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20240130095353.2881-1-darinzon@amazon.com> References: <20240130095353.2881-1-darinzon@amazon.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Precedence: Bulk X-Patchwork-Delegate: kuba@kernel.org From: David Arinzon This patch contains more details about the functionality of RX copybreak. Signed-off-by: Shay Agroskin Signed-off-by: David Arinzon --- .../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 ==========