From patchwork Thu Mar 11 12:24:10 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ido Schimmel X-Patchwork-Id: 12131121 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-11.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E1867C433E9 for ; Thu, 11 Mar 2021 12:25:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9AC7364FE9 for ; Thu, 11 Mar 2021 12:25:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233092AbhCKMZO (ORCPT ); Thu, 11 Mar 2021 07:25:14 -0500 Received: from out3-smtp.messagingengine.com ([66.111.4.27]:58977 "EHLO out3-smtp.messagingengine.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232709AbhCKMZG (ORCPT ); Thu, 11 Mar 2021 07:25:06 -0500 Received: from compute3.internal (compute3.nyi.internal [10.202.2.43]) by mailout.nyi.internal (Postfix) with ESMTP id 7D2B45C008B; Thu, 11 Mar 2021 07:25:05 -0500 (EST) Received: from mailfrontend2 ([10.202.2.163]) by compute3.internal (MEProxy); Thu, 11 Mar 2021 07:25:05 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:content-transfer-encoding:date:from :message-id:mime-version:subject:to:x-me-proxy:x-me-proxy :x-me-sender:x-me-sender:x-sasl-enc; s=fm2; bh=uyoOmZcEbjVxODH+1 WEQaBWpXhhNJG/3Bk2DulHQ/9w=; b=XuhwzMiboxkvIVetCfN0t/tKdlphR6DFO VODRPHKwm+uDkVh21pMzhtgsndx8KEZgFO1uvDK69TycFHoNjyyA4HQXMCvS3Clr PzNPNGf2pHY2PuwwiT9l5wwTxTzeraaW23ntK0Q0jvogcy/aiCtjRWQpUmFujoXI j3uKQazD2i8LxfPv5HxKqUg9sam/LsTf35AL294nLUqYyu5851xtiq02d++G1jIq 5wvp+ijSJd9s07PbbfoFpf/xtr1rOdjYOos7kznyxLFj9teZ4tZnNjj4jhOKmPu0 b33WB4bqFqQD3f3/x8U0KKqq4A4iFAjePYpc4csPs4dIUClAngSWQ== X-ME-Sender: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgeduledruddvtddggedtucetufdoteggodetrfdotf fvucfrrhhofhhilhgvmecuhfgrshhtofgrihhlpdfqfgfvpdfurfetoffkrfgpnffqhgen uceurghilhhouhhtmecufedttdenucenucfjughrpefhvffufffkofgggfestdekredtre dttdenucfhrhhomhepkfguohcuufgthhhimhhmvghluceoihguohhstghhsehiughoshgt hhdrohhrgheqnecuggftrfgrthhtvghrnhepteevgefhvefggfffkeeuffeuvdfhueehhe etffeikeegheevfedvgeelvdffudfhnecukfhppeekgedrvddvledrudehfedrgeegnecu vehluhhsthgvrhfuihiivgeptdenucfrrghrrghmpehmrghilhhfrhhomhepihguohhstg hhsehiughoshgthhdrohhrgh X-ME-Proxy: Received: from shredder.lan (igld-84-229-153-44.inter.net.il [84.229.153.44]) by mail.messagingengine.com (Postfix) with ESMTPA id 893E21080057; Thu, 11 Mar 2021 07:25:03 -0500 (EST) From: Ido Schimmel To: netdev@vger.kernel.org Cc: davem@davemloft.net, kuba@kernel.org, jiri@nvidia.com, mlxsw@nvidia.com, Ido Schimmel Subject: [PATCH net-next 0/6] mlxsw: Implement sampling using mirroring Date: Thu, 11 Mar 2021 14:24:10 +0200 Message-Id: <20210311122416.2620300-1-idosch@idosch.org> X-Mailer: git-send-email 2.29.2 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org From: Ido Schimmel So far, sampling was implemented using a dedicated sampling mechanism that is available on all Spectrum ASICs. Spectrum-2 and later ASICs support sampling by mirroring packets to the CPU port with probability. This method has a couple of advantages compared to the legacy method: * Extra metadata per-packet: Egress port, egress traffic class, traffic class occupancy and end-to-end latency * Ability to sample packets on egress / per-flow as opposed to only ingress This series should not result in any user-visible changes and its aim is to convert Spectrum-2 and later ASICs to perform sampling by mirroring to the CPU port with probability. Future submissions will expose the additional metadata and enable sampling using more triggers (e.g., egress). Series overview: Patches #1-#3 extend the SPAN (mirroring) module to accept new parameters required for sampling. See individual commit messages for detailed explanation. Patch #4-#5 split sampling support between Spectrum-1 and later ASIC while still using the legacy method for all ASIC generations. Patch #6 converts Spectrum-2 and later ASICs to perform sampling by mirroring to the CPU port with probability. Ido Schimmel (6): mlxsw: spectrum_span: Add SPAN session identifier support mlxsw: reg: Extend mirroring registers with probability rate field mlxsw: spectrum_span: Add SPAN probability rate support mlxsw: spectrum_matchall: Split sampling support between ASICs mlxsw: spectrum_trap: Split sampling traps between ASICs mlxsw: spectrum_matchall: Implement sampling using mirroring drivers/net/ethernet/mellanox/mlxsw/reg.h | 17 +++- .../net/ethernet/mellanox/mlxsw/spectrum.c | 3 + .../net/ethernet/mellanox/mlxsw/spectrum.h | 12 +++ .../mellanox/mlxsw/spectrum_matchall.c | 86 ++++++++++++++++++- .../ethernet/mellanox/mlxsw/spectrum_qdisc.c | 5 +- .../ethernet/mellanox/mlxsw/spectrum_span.c | 21 ++++- .../ethernet/mellanox/mlxsw/spectrum_span.h | 16 ++++ .../ethernet/mellanox/mlxsw/spectrum_trap.c | 43 +++++++--- 8 files changed, 181 insertions(+), 22 deletions(-)