From patchwork Wed Apr 26 05:47:31 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hariprasad Kelam X-Patchwork-Id: 13224071 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id B620AC77B60 for ; Wed, 26 Apr 2023 05:49:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239466AbjDZFtV (ORCPT ); Wed, 26 Apr 2023 01:49:21 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55586 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239433AbjDZFtP (ORCPT ); Wed, 26 Apr 2023 01:49:15 -0400 Received: from mx0b-0016f401.pphosted.com (mx0a-0016f401.pphosted.com [67.231.148.174]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D9E4135AF; Tue, 25 Apr 2023 22:48:50 -0700 (PDT) Received: from pps.filterd (m0045849.ppops.net [127.0.0.1]) by mx0a-0016f401.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 33PJ0k0P012965; Tue, 25 Apr 2023 22:48:27 -0700 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=marvell.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-type; s=pfpt0220; bh=Pr0kr9n/DzGBe9MTqSwgVAn7Iur8skCjJRNn9qOW+Uw=; b=bzoPWVLKr8UfDXxjYwXvC+0eLApUlgxgdHDTuvUDhGhUlJuml5owLJ+ZlviSWCnatuq8 mPihVpMymFPHYq63HwgUOMRiNb5p2s59cRFhsVES4SAWqk74gAxdrbJJqvSmROvbVlKi IAcRKDv8ZOd+cu7NpQITmpDZOCzfAngrdrFOaVVnSj6K3kxrDDeD3blj1Nv6uqcWz3iE SG+iPUGwe5spXUIH+35VmiFZvjehvFYJIhGt7SyXb+/Nm6RoYq/IQhhhX2f4dBe79QxS jiJ2p44w0BwBvJp8ruEPyMXHmaiUuWZ9UE3npLqjNXbKD9cy7rftjKxJ71sPR1gbP3ML Jw== Received: from dc5-exch01.marvell.com ([199.233.59.181]) by mx0a-0016f401.pphosted.com (PPS) with ESMTPS id 3q6c2fcw3k-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-SHA384 bits=256 verify=NOT); Tue, 25 Apr 2023 22:48:27 -0700 Received: from DC5-EXCH01.marvell.com (10.69.176.38) by DC5-EXCH01.marvell.com (10.69.176.38) with Microsoft SMTP Server (TLS) id 15.0.1497.48; Tue, 25 Apr 2023 22:48:26 -0700 Received: from maili.marvell.com (10.69.176.80) by DC5-EXCH01.marvell.com (10.69.176.38) with Microsoft SMTP Server id 15.0.1497.48 via Frontend Transport; Tue, 25 Apr 2023 22:48:26 -0700 Received: from hyd1soter3.marvell.com (unknown [10.29.37.12]) by maili.marvell.com (Postfix) with ESMTP id A321B3F706D; Tue, 25 Apr 2023 22:48:20 -0700 (PDT) From: Hariprasad Kelam To: , CC: , , , , , , , , , , , , , , , , , Subject: [net-next Patch v10 8/8] docs: octeontx2: Add Documentation for QOS Date: Wed, 26 Apr 2023 11:17:31 +0530 Message-ID: <20230426054731.5720-9-hkelam@marvell.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20230426054731.5720-1-hkelam@marvell.com> References: <20230426054731.5720-1-hkelam@marvell.com> MIME-Version: 1.0 X-Proofpoint-GUID: 29_RWryjuCcrM-fPT1syhH-ewNsBXlr4 X-Proofpoint-ORIG-GUID: 29_RWryjuCcrM-fPT1syhH-ewNsBXlr4 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.942,Hydra:6.0.573,FMLib:17.11.170.22 definitions=2023-04-26_02,2023-04-25_01,2023-02-09_01 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org Add QOS example configuration along with tc-htb commands Signed-off-by: Hariprasad Kelam Reviewed-by: Simon Horman --- .../ethernet/marvell/octeontx2.rst | 45 +++++++++++++++++++ 1 file changed, 45 insertions(+) diff --git a/Documentation/networking/device_drivers/ethernet/marvell/octeontx2.rst b/Documentation/networking/device_drivers/ethernet/marvell/octeontx2.rst index 5ba9015336e2..bfd233cfac35 100644 --- a/Documentation/networking/device_drivers/ethernet/marvell/octeontx2.rst +++ b/Documentation/networking/device_drivers/ethernet/marvell/octeontx2.rst @@ -13,6 +13,7 @@ Contents - `Drivers`_ - `Basic packet flow`_ - `Devlink health reporters`_ +- `Quality of service`_ Overview ======== @@ -287,3 +288,47 @@ For example:: NIX_AF_ERR: NIX Error Interrupt Reg : 64 Rx on unmapped PF_FUNC + + +Quality of service +================== + + +Hardware algorithms used in scheduling +-------------------------------------- + +octeontx2 silicon and CN10K transmit interface consists of five transmit levels +starting from SMQ/MDQ, TL4 to TL1. Each packet will traverse MDQ, TL4 to TL1 +levels. Each level contains an array of queues to support scheduling and shaping. +The hardware uses the below algorithms depending on the priority of scheduler queues. +once the usercreates tc classes with different priorities, the driver configures +schedulers allocated to the class with specified priority along with rate-limiting +configuration. + +1. Strict Priority + + - Once packets are submitted to MDQ, hardware picks all active MDQs having different priority + using strict priority. + +2. Round Robin + + - Active MDQs having the same priority level are chosen using round robin. + + +Setup HTB offload +----------------- + +1. Enable HW TC offload on the interface:: + + # ethtool -K hw-tc-offload on + +2. Crate htb root:: + + # tc qdisc add dev clsact + # tc qdisc replace dev root handle 1: htb offload + +3. Create tc classes with different priorities:: + + # tc class add dev parent 1: classid 1:1 htb rate 10Gbit prio 1 + + # tc class add dev parent 1: classid 1:2 htb rate 10Gbit prio 7