From mboxrd@z Thu Jan 1 00:00:00 1970 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 5D1EDC7618D for ; Thu, 6 Apr 2023 10:23:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237259AbjDFKW7 (ORCPT ); Thu, 6 Apr 2023 06:22:59 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45764 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237154AbjDFKWg (ORCPT ); Thu, 6 Apr 2023 06:22:36 -0400 Received: from mx0b-0016f401.pphosted.com (mx0a-0016f401.pphosted.com [67.231.148.174]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 13716975C; Thu, 6 Apr 2023 03:21:58 -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 3365ZVoW018085; Thu, 6 Apr 2023 03:21:47 -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=ettstRGWvS56fnp3bZw7OTRsDyBJuDTMzGdoHrt4m3U=; b=AuEUVsob9pI8yLEZmhz0ucR+2nCRPWdAd/X4rd8o637+FwspykV3P9hBhCpkJcw9tETY /nb2966Knmg1cCLW0LPzquWUlVe6vPaA0702DUpBvgmhwa5VzgTEYxY0NQS4IUHnLTUQ 4cLfguRqXvl7JIO6IR+s708jYJFCMKK3TZGEIlJEP/FdRc9basH0yGOiGz+NCvhl08tz SMVw9jw1S63kMAV4uSeZK6U0xdo7s4gAALO3ClvTmWBbSw9C9PfO0bwWemINW2EXQV9L OJQdKpzfTGSbZFUHU6jKblKQh4Z9lbrqpWnmMY8AvTT9rjWAl10kkPjuECr4BILoN9EZ 4w== Received: from dc5-exch01.marvell.com ([199.233.59.181]) by mx0a-0016f401.pphosted.com (PPS) with ESMTPS id 3psr2e1cnb-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-SHA384 bits=256 verify=NOT); Thu, 06 Apr 2023 03:21:47 -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; Thu, 6 Apr 2023 03:21:45 -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; Thu, 6 Apr 2023 03:21:45 -0700 Received: from hyd1soter3.marvell.com (unknown [10.29.37.12]) by maili.marvell.com (Postfix) with ESMTP id 1E8F65B693B; Thu, 6 Apr 2023 03:21:39 -0700 (PDT) From: Hariprasad Kelam To: , CC: , , , , , , , , , , , , , , , , Subject: [net-next Patch v6 6/6] docs: octeontx2: Add Documentation for QOS Date: Thu, 6 Apr 2023 15:51:03 +0530 Message-ID: <20230406102103.19910-7-hkelam@marvell.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20230406102103.19910-1-hkelam@marvell.com> References: <20230406102103.19910-1-hkelam@marvell.com> MIME-Version: 1.0 Content-Type: text/plain X-Proofpoint-GUID: J3Rm-QNBHcfqAdC6fE_5OFVKWBxcsyVC X-Proofpoint-ORIG-GUID: J3Rm-QNBHcfqAdC6fE_5OFVKWBxcsyVC 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=2023-04-06_04,2023-04-06_01,2023-02-09_01 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add QOS example configuration along with tc-htb commands Signed-off-by: Hariprasad Kelam Reviewed-by: Simon Horman --- .../ethernet/marvell/octeontx2.rst | 39 +++++++++++++++++++ 1 file changed, 39 insertions(+) diff --git a/Documentation/networking/device_drivers/ethernet/marvell/octeontx2.rst b/Documentation/networking/device_drivers/ethernet/marvell/octeontx2.rst index 5ba9015336e2..eca4309964c8 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 +288,41 @@ For example:: NIX_AF_ERR: NIX Error Interrupt Reg : 64 Rx on unmapped PF_FUNC + + +Quality of service +================== + +octeontx2 silicon and CN10K transmit interface consists of five transmit levels starting from SMQ/MDQ, TL4 to TL1. +The hardware uses the below algorithms depending on the priority of scheduler queues + +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. + +3. Each packet will traverse MDQ, TL4 to TL1 levels. Each level contains an array of queues to support scheduling and + shaping. + +4. once the user creates tc classes with different priority + + - Driver configures schedulers allocated to the class with specified priority along with rate-limiting configuration. + +5. Enable HW TC offload on the interface:: + + # ethtool -K hw-tc-offload on + +6. Crate htb root:: + + # tc qdisc add dev clsact + # tc qdisc replace dev root handle 1: htb offload + +7. 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 -- 2.17.1