From patchwork Mon Jan 29 08:55:22 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Arinzon, David" X-Patchwork-Id: 13535241 X-Patchwork-Delegate: kuba@kernel.org Received: from smtp-fw-80009.amazon.com (smtp-fw-80009.amazon.com [99.78.197.220]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 090C954BCC for ; Mon, 29 Jan 2024 08:55:53 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=99.78.197.220 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706518555; cv=none; b=Gq2Rmwcas9bHrRbcDNU9+RWGhItequ34VCkdSIarKKIawgbkqb/k0nNyrG7JoUw+CopYH9AqjIvljHA1thSZYEVnz9L2mKd5nb3qp9Im7DHZjhafymSPwBSEq1CNJx3gb0Kdqedf/fOP8WVZIDyidRfGOhHxd+WrjHlp7EhCCTo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706518555; c=relaxed/simple; bh=7Xwfv8f5n/0roylanI2AVhmecF4+uBhkRLmVXINAn2I=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=bdjaAJXkbOeFfWAG0Q1ksYfQPE62XOgzW91NJxfnsZOKXWNeqA7rcxGl2sZ/JtfzYsjwmLvOTjZmIl6JRQrs+BOOj+UQ7cdo4FZx0u0Lj4KT49h6C6A1VQD4smly4mGHWAER1cL2pT+oZeh0LXBFlh0+qkX7lodsXuM+lMomx28= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=amazon.com; spf=pass smtp.mailfrom=amazon.com; dkim=pass (1024-bit key) header.d=amazon.com header.i=@amazon.com header.b=egUw4vCi; arc=none smtp.client-ip=99.78.197.220 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=amazon.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=amazon.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=amazon.com header.i=@amazon.com header.b="egUw4vCi" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amazon.com; i=@amazon.com; q=dns/txt; s=amazon201209; t=1706518553; x=1738054553; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=xJQrjmv5kbwgbrIGiSJEihUFrFIZVx3WNc1vVpc4CYA=; b=egUw4vCiqZh7+FoBQgL+nwliPL03gKF0X6yJkt5cWHDjDimPnZfWiNY0 oaNKwDaWARgVlz4+Q2ZLapgj+bmedEOklOALIzmVTHiex/17RWwroy7p1 v0xtUhMrevyu/uktt18qE0UUc9SSWRYB+xc55pH6WrsbcnufNIpBYG9vY o=; X-IronPort-AV: E=Sophos;i="6.05,226,1701129600"; d="scan'208";a="61845582" Received: from pdx4-co-svc-p1-lb2-vlan2.amazon.com (HELO email-inbound-relay-iad-1e-m6i4x-b538c141.us-east-1.amazon.com) ([10.25.36.210]) by smtp-border-fw-80009.pdx80.corp.amazon.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 Jan 2024 08:55:50 +0000 Received: from smtpout.prod.us-west-2.prod.farcaster.email.amazon.dev (iad7-ws-svc-p70-lb3-vlan2.iad.amazon.com [10.32.235.34]) by email-inbound-relay-iad-1e-m6i4x-b538c141.us-east-1.amazon.com (Postfix) with ESMTPS id BDE66A27FB; Mon, 29 Jan 2024 08:55:49 +0000 (UTC) Received: from EX19MTAUWB001.ant.amazon.com [10.0.38.20:27779] by smtpin.naws.us-west-2.prod.farcaster.email.amazon.dev [10.0.48.103:2525] with esmtp (Farcaster) id fe7d23ac-48bd-412a-8ece-76cbb66c0a20; Mon, 29 Jan 2024 08:55:49 +0000 (UTC) X-Farcaster-Flow-ID: fe7d23ac-48bd-412a-8ece-76cbb66c0a20 Received: from EX19D010UWB003.ant.amazon.com (10.13.138.81) by EX19MTAUWB001.ant.amazon.com (10.250.64.248) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.40; Mon, 29 Jan 2024 08:55:47 +0000 Received: from EX19MTAUWB001.ant.amazon.com (10.250.64.248) by EX19D010UWB003.ant.amazon.com (10.13.138.81) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.40; Mon, 29 Jan 2024 08:55:46 +0000 Received: from dev-dsk-darinzon-1c-05962a8d.eu-west-1.amazon.com (172.19.80.187) by mail-relay.amazon.com (10.250.64.254) with Microsoft SMTP Server id 15.2.1118.40 via Frontend Transport; Mon, 29 Jan 2024 08:55:44 +0000 From: To: 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 v1 net-next 02/11] net: ena: Add more documentation for RX copybreak Date: Mon, 29 Jan 2024 08:55:22 +0000 Message-ID: <20240129085531.15608-3-darinzon@amazon.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20240129085531.15608-1-darinzon@amazon.com> References: <20240129085531.15608-1-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 ==========