From patchwork Mon Jun 29 13:13:27 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Denis Kirjanov X-Patchwork-Id: 216893 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=-10.0 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, 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 E6512C433DF for ; Mon, 29 Jun 2020 20:44:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C4F1E20663 for ; Mon, 29 Jun 2020 20:44:31 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linux-powerpc-org.20150623.gappssmtp.com header.i=@linux-powerpc-org.20150623.gappssmtp.com header.b="fctEZfRk" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731615AbgF2Uoa (ORCPT ); Mon, 29 Jun 2020 16:44:30 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43392 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731604AbgF2TOA (ORCPT ); Mon, 29 Jun 2020 15:14:00 -0400 Received: from mail-lj1-x243.google.com (mail-lj1-x243.google.com [IPv6:2a00:1450:4864:20::243]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7EC83C02A55B for ; Mon, 29 Jun 2020 06:13:56 -0700 (PDT) Received: by mail-lj1-x243.google.com with SMTP id 9so17963955ljv.5 for ; Mon, 29 Jun 2020 06:13:56 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux-powerpc-org.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=CCHg421KUhsy+nSn5wmRg7L3793Q0baKUacKDGsu3gU=; b=fctEZfRkcc1OVCKtSsfxjUB5UPqITfJ2aixSWWatkYlO7PTB8ag0Jdb9/Bsc+2P8bA 8ELtHRw7O+ijJkWB6KL7bGfJDzPNYDDIwaC5e0J5eRGo4ke0MbKN1XlovSpfmZQ5tPJf tDyPdQuKevZk02kegBrsdek4J23mLmC5jx9+ignQdxLfZBqswDA3+LHfYuCsL3W44Oib k2/iBXsgooT/INsw5EgXbEKdxdH1WVdDy/UhnUe0x+O5x4blaeKr+Wm8AMBigjS4Wvup fJp/iE+Z2qUyUcPhtQgLErtyog9Y3GaRfW1ZhaFCrdJd0p6WVW6Hh6/Qwh1ngIM8h7Ib IRqw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=CCHg421KUhsy+nSn5wmRg7L3793Q0baKUacKDGsu3gU=; b=Up56X5iMOMAq6IyOutb+lvBvHv72as+6TdL1j4hPhmKRCNLEba8bH611Xq0rCqnUOr 3P89JeVoRNA8XzJv/AFsFJEGo3f+DLB6Cqpllr6aeIGMcknKPvMDiElWWdmYoaaht9Y0 DxTvpMtERv/0MI8s8jgPqXGeVVP2Fp/8oc0vURuh5ovnG6Qy6SObAgLHWkYOLJSScqOO LwVhQ7NmGsOCotpE3tYhVKOcnhIa9QLGus7RzrA5nJywS8kiDu5vkmfu2+xFmztym3bL qNW1jdnJDAKq78HTuqfFi2BNxxw2hGMvg4CcKc9PNhI3uzY0yXznsR9dcu20aX5nYWIw Fk6A== X-Gm-Message-State: AOAM532UXNgX4B6j+2kzuYQNUirhcFUry2yxVaZamgkxee9QFUBeZk2z JT1slq2pt6mCNDrsJpaZ1tzLFuDqi7GnLw== X-Google-Smtp-Source: ABdhPJyh6Lw4SQXnnbnwpxNgMt2T5awwRrB10JBqJYb08GQQl24ZkD4Vd7yNMlBSGCOMShqJS35tvg== X-Received: by 2002:a05:651c:106f:: with SMTP id y15mr8405335ljm.32.1593436434403; Mon, 29 Jun 2020 06:13:54 -0700 (PDT) Received: from centos7-pv-guest.localdomain ([5.35.13.201]) by smtp.gmail.com with ESMTPSA id 16sm647916ljw.127.2020.06.29.06.13.53 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Mon, 29 Jun 2020 06:13:53 -0700 (PDT) From: Denis Kirjanov To: netdev@vger.kernel.org Cc: brouer@redhat.com, jgross@suse.com, wei.liu@kernel.org, paul@xen.org, ilias.apalodimas@linaro.org Subject: [PATCH net-next v14 1/3] xen: netif.h: add a new extra type for XDP Date: Mon, 29 Jun 2020 16:13:27 +0300 Message-Id: <1593436409-1101-2-git-send-email-kda@linux-powerpc.org> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1593436409-1101-1-git-send-email-kda@linux-powerpc.org> References: <1593436409-1101-1-git-send-email-kda@linux-powerpc.org> Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org The patch adds a new extra type to be able to diffirentiate between RX responses on xen-netfront side with the adjusted offset required for XDP processing. The offset value from a guest is passed via xenstore. Signed-off-by: Denis Kirjanov --- include/xen/interface/io/netif.h | 20 +++++++++++++++++++- 1 file changed, 19 insertions(+), 1 deletion(-) diff --git a/include/xen/interface/io/netif.h b/include/xen/interface/io/netif.h index 4f20dbc..2194322 100644 --- a/include/xen/interface/io/netif.h +++ b/include/xen/interface/io/netif.h @@ -161,6 +161,19 @@ */ /* + * "xdp-headroom" is used to request that extra space is added + * for XDP processing. The value is measured in bytes and passed by + * the frontend to be consistent between both ends. + * If the value is greater than zero that means that + * an RX response is going to be passed to an XDP program for processing. + * XEN_NETIF_MAX_XDP_HEADROOM defines the maximum headroom offset in bytes + * + * "feature-xdp-headroom" is set to "1" by the netback side like other features + * so a guest can check if an XDP program can be processed. + */ +#define XEN_NETIF_MAX_XDP_HEADROOM 0x7FFF + +/* * Control ring * ============ * @@ -846,7 +859,8 @@ struct xen_netif_tx_request { #define XEN_NETIF_EXTRA_TYPE_MCAST_ADD (2) /* u.mcast */ #define XEN_NETIF_EXTRA_TYPE_MCAST_DEL (3) /* u.mcast */ #define XEN_NETIF_EXTRA_TYPE_HASH (4) /* u.hash */ -#define XEN_NETIF_EXTRA_TYPE_MAX (5) +#define XEN_NETIF_EXTRA_TYPE_XDP (5) /* u.xdp */ +#define XEN_NETIF_EXTRA_TYPE_MAX (6) /* xen_netif_extra_info_t flags. */ #define _XEN_NETIF_EXTRA_FLAG_MORE (0) @@ -879,6 +893,10 @@ struct xen_netif_extra_info { uint8_t algorithm; uint8_t value[4]; } hash; + struct { + uint16_t headroom; + uint16_t pad[2]; + } xdp; uint16_t pad[3]; } u; };