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 X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,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 7A3BFC433DB for ; Wed, 3 Mar 2021 22:56:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 482CF64F0D for ; Wed, 3 Mar 2021 22:56:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1391867AbhCCWu7 (ORCPT ); Wed, 3 Mar 2021 17:50:59 -0500 Received: from mga01.intel.com ([192.55.52.88]:22658 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1377744AbhCCPvD (ORCPT ); Wed, 3 Mar 2021 10:51:03 -0500 IronPort-SDR: zmopqqqmECsoWwMOBulXRhZtu+hpW0T4G9EWKDRpVTWu5JB4NJyimSrpCiJ519eNXlCECeWXld iOX6ktQkikpQ== X-IronPort-AV: E=McAfee;i="6000,8403,9912"; a="206909542" X-IronPort-AV: E=Sophos;i="5.81,220,1610438400"; d="scan'208";a="206909542" Received: from orsmga004.jf.intel.com ([10.7.209.38]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 03 Mar 2021 07:49:39 -0800 IronPort-SDR: yJPyFw/QMQX7wgDc3zeaJ69wXLpikCfDay3TwKl+Z0lFystwk16Zjco+CoRBHzsB8QiS0WCqwV cxx6aQdpj1XA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.81,220,1610438400"; d="scan'208";a="518322016" Received: from ranger.igk.intel.com ([10.102.21.164]) by orsmga004.jf.intel.com with ESMTP; 03 Mar 2021 07:49:36 -0800 From: Maciej Fijalkowski To: intel-wired-lan@lists.osuosl.org Cc: netdev@vger.kernel.org, bpf@vger.kernel.org, brouer@redhat.com, anthony.l.nguyen@intel.com, kuba@kernel.org, bjorn.topel@intel.com, magnus.karlsson@intel.com, Maciej Fijalkowski Subject: [PATCH intel-net 2/3] ice: move headroom initialization to ice_setup_rx_ctx Date: Wed, 3 Mar 2021 16:39:27 +0100 Message-Id: <20210303153928.11764-3-maciej.fijalkowski@intel.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20210303153928.11764-1-maciej.fijalkowski@intel.com> References: <20210303153928.11764-1-maciej.fijalkowski@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org ice_rx_offset(), that is supposed to initialize the Rx buffer headroom, relies on ICE_RX_FLAGS_RING_BUILD_SKB flag as well as XDP prog presence. Currently, the callsite of mentioned function is placed incorrectly within ice_setup_rx_ring() where Rx ring's build skb flag is not set yet. This causes the XDP_REDIRECT to be partially broken due to inability to create xdp_frame in the headroom space, as the headroom is 0. Fix this by moving ice_rx_offset() to ice_setup_rx_ctx() after the flag setting. Fixes: f1b1f409bf79 ("ice: store the result of ice_rx_offset() onto ice_ring") Signed-off-by: Maciej Fijalkowski --- drivers/net/ethernet/intel/ice/ice_base.c | 18 ++++++++++++++++++ drivers/net/ethernet/intel/ice/ice_txrx.c | 17 ----------------- 2 files changed, 18 insertions(+), 17 deletions(-) diff --git a/drivers/net/ethernet/intel/ice/ice_base.c b/drivers/net/ethernet/intel/ice/ice_base.c index 3124a3bf519a..95f674bd52c3 100644 --- a/drivers/net/ethernet/intel/ice/ice_base.c +++ b/drivers/net/ethernet/intel/ice/ice_base.c @@ -274,6 +274,22 @@ ice_setup_tx_ctx(struct ice_ring *ring, struct ice_tlan_ctx *tlan_ctx, u16 pf_q) tlan_ctx->legacy_int = ICE_TX_LEGACY; } +/** + * ice_rx_offset - Return expected offset into page to access data + * @rx_ring: Ring we are requesting offset of + * + * Returns the offset value for ring into the data buffer. + */ +static unsigned int ice_rx_offset(struct ice_ring *rx_ring) +{ + if (ice_ring_uses_build_skb(rx_ring)) + return ICE_SKB_PAD; + else if (ice_is_xdp_ena_vsi(rx_ring->vsi)) + return XDP_PACKET_HEADROOM; + + return 0; +} + /** * ice_setup_rx_ctx - Configure a receive ring context * @ring: The Rx ring to configure @@ -413,6 +429,8 @@ int ice_setup_rx_ctx(struct ice_ring *ring) else ice_set_ring_build_skb_ena(ring); + ring->rx_offset = ice_rx_offset(ring); + /* init queue specific tail register */ ring->tail = hw->hw_addr + QRX_TAIL(pf_q); writel(0, ring->tail); diff --git a/drivers/net/ethernet/intel/ice/ice_txrx.c b/drivers/net/ethernet/intel/ice/ice_txrx.c index b7dc25da1202..b91dcfd12727 100644 --- a/drivers/net/ethernet/intel/ice/ice_txrx.c +++ b/drivers/net/ethernet/intel/ice/ice_txrx.c @@ -443,22 +443,6 @@ void ice_free_rx_ring(struct ice_ring *rx_ring) } } -/** - * ice_rx_offset - Return expected offset into page to access data - * @rx_ring: Ring we are requesting offset of - * - * Returns the offset value for ring into the data buffer. - */ -static unsigned int ice_rx_offset(struct ice_ring *rx_ring) -{ - if (ice_ring_uses_build_skb(rx_ring)) - return ICE_SKB_PAD; - else if (ice_is_xdp_ena_vsi(rx_ring->vsi)) - return XDP_PACKET_HEADROOM; - - return 0; -} - /** * ice_setup_rx_ring - Allocate the Rx descriptors * @rx_ring: the Rx ring to set up @@ -493,7 +477,6 @@ int ice_setup_rx_ring(struct ice_ring *rx_ring) rx_ring->next_to_use = 0; rx_ring->next_to_clean = 0; - rx_ring->rx_offset = ice_rx_offset(rx_ring); if (ice_is_xdp_ena_vsi(rx_ring->vsi)) WRITE_ONCE(rx_ring->xdp_prog, rx_ring->vsi->xdp_prog); -- 2.20.1