From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by inbox.dpdk.org (Postfix) with ESMTP id 715514235E; Wed, 11 Oct 2023 10:35:02 +0200 (CEST) Received: from mails.dpdk.org (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 5B96F402C2; Wed, 11 Oct 2023 10:35:02 +0200 (CEST) Received: from NAM10-DM6-obe.outbound.protection.outlook.com (mail-dm6nam10on2086.outbound.protection.outlook.com [40.107.93.86]) by mails.dpdk.org (Postfix) with ESMTP id 1C69740279 for ; Wed, 11 Oct 2023 10:35:00 +0200 (CEST) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=TrIEY0a7YnekhK9PnMJalldP78T+dfGX9RUASJhh3GEz73v0u3KEJatvkb2xGgLzryL4igmordAV02l1HBPBfPjPmLZ8jLLESRGGt317ecVrdjc02+YQVfEj9p16qTwhjjeTRVYCQEGgeqpJCgnUgkAMysKgVXwox7oyfsT6VvjGRtmXzX7mZxP88Ne2Gp6HhIgi2WFTONaMBL7lryDLzovkgeZdSic/+6XFMb4kWXsskR0QLDRWf+T1DSb7ENusVSsKQQh8xIKaRCy38GQYX8enDQiwCrycqN0k/aoTCZxDd4bz8F96MkIiAWaSKQCZ5OXbNPke3e1bbuR4pXYWhg== ARC-Message-Signature: i=1; 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b=tgimIrkC0WPFI+0juAl+3mzFDcIEa2oDHnMdxGfUqeiH2UT7YVMx9wBeldDLylBvO8R2vYBodcylXWECYSf8nUZ/Cfm886gJVJts96tjdyVYvK9xG/zm1KOW44pnK6XvBz9/OaxWFNaSLjwOSa5kS4aq2WyX7kcff5JJ5G2cgOQ= Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=amd.com; Received: from CH2PR12MB4294.namprd12.prod.outlook.com (2603:10b6:610:a9::11) by BY5PR12MB4324.namprd12.prod.outlook.com (2603:10b6:a03:209::10) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6863.38; Wed, 11 Oct 2023 08:34:57 +0000 Received: from CH2PR12MB4294.namprd12.prod.outlook.com ([fe80::102f:c69b:d3e5:7fe8]) by CH2PR12MB4294.namprd12.prod.outlook.com ([fe80::102f:c69b:d3e5:7fe8%4]) with mapi id 15.20.6863.032; Wed, 11 Oct 2023 08:34:57 +0000 Message-ID: <4805b07d-a268-49f6-9931-4bc728502825@amd.com> Date: Wed, 11 Oct 2023 09:34:50 +0100 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] ethdev: add calculate hash function Content-Language: en-US To: fengchengwen , Ori Kam , cristian.dumitrescu@intel.com, Aman Singh , Yuying Zhang , Thomas Monjalon , Andrew Rybchenko Cc: dev@dpdk.org, rasland@nvidia.com References: <20230926113753.28765-1-orika@nvidia.com> <1ea4cca3-de4e-4495-ab32-abb88b71bf6d@amd.com> <04a3c2d3-4912-58f6-68d5-e93dcc1be768@huawei.com> From: Ferruh Yigit Autocrypt: addr=ferruh.yigit@amd.com; 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Create insert by index table with 2 rules, that hashes based on dmac >>> 2. Insert to index 0 a rule that sends the traffic to port A. >>> 3. Insert to index 1 a rule that sends the traffic to port B. >>> >>> Let's also assume that before this table, there is a 5 tuple >>> match table that jumps to the above table. >>> >>> So each packet that matches one of the 5 tuple rules is RSSed >>> to port A or B, based on dmac hash. >>> >>> The issue arises when there is a miss on the 5 tuple table, >>> which resulted due to the packet being the first packet of this flow, or >>> fragmented packet or any other reason. >>> In this case, the application must calculate what would be the >>> hash calculated by the HW so it can send the packet to the correct >>> port. >>> >>> This new API allows applications to calculate the hash value of a given >>> packet for a given table. >>> >>> [1] - http://patches.dpdk.org/project/dpdk/patch/20230208030624.78465-2-akozyrev@nvidia.com/ >>> >>> Signed-off-by: Ori Kam >>> --- >>> app/test-pmd/cmdline_flow.c | 86 +++++++++++++++++++++++++++++++++++- >>> app/test-pmd/config.c | 54 ++++++++++++++++++++++ >>> app/test-pmd/testpmd.h | 2 + >>> lib/ethdev/rte_flow.c | 21 +++++++++ >>> lib/ethdev/rte_flow.h | 32 ++++++++++++++ >>> lib/ethdev/rte_flow_driver.h | 5 +++ >>> lib/ethdev/version.map | 1 + >>> 7 files changed, 200 insertions(+), 1 deletion(-) >>> >> >> This is a new rte_flow API but unfortunately there isn't any >> review/comment, at least it is experimental API. If there is no >> objection/discussion in next few days, I will merge the feature. >> >> Probably it will be another rte flow feature that only NVIDIA knows and >> uses. While mentioned from using, is the driver update for the feature > > The hns3 driver support subset of rte_flow, we found the rte_flow feature is very flexible. > And its implementation varies according to vendors. > > Can the rte_flow be standardized ? > Hi Chengwen, Yes rte_flow is already implemented by many vendors, each uses some subset of it. It is flexible and useful, no concern about it. My point was, most of the new rte_flow features are coming from single vendor and most of them are not fully reviewed by the wider community. As some of the features merged without much review from wider community, not everyone aware of them, and features are not fully benefited from, although that is somewhat related to HW support as Jerin pointed before. As hns3 is a user of the rte_flow already, it would be great to get more feedback and review from hns3 maintainers, that boosts the confidence to the new proposed features/APIs. Thanks, ferruh >> planned for this release? >> >> >> Meanwhile, can you please update the documentation, `rte_flow.rst` and >> `testpmd_funcs.rst`? >> Also can you please rebase on top of latest next-net, this patch >> conflicts with merged group set miss action feature. >> >> . >>