From patchwork Wed Sep 7 15:45:41 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jesper Dangaard Brouer X-Patchwork-Id: 12969161 X-Patchwork-Delegate: bpf@iogearbox.net 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 86440C38145 for ; Wed, 7 Sep 2022 15:46:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229767AbiIGPqA (ORCPT ); Wed, 7 Sep 2022 11:46:00 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48684 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229672AbiIGPpt (ORCPT ); Wed, 7 Sep 2022 11:45:49 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0307B6AA0F for ; Wed, 7 Sep 2022 08:45:47 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1662565547; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=q/RYCLcFxWXVg4sepSF6T1VgsBBx9ixyS2xZVokLGcw=; b=Z+NyGw3CaZzzBnCi3a1SlposuQ7934n+o8WgEuEWeiqK5+rlHgHfgQWlrkdRJ9rY0j+oeb 1ijNECQJu5Zv3KOpPCVMa8gamBV+Fg0FYrLP4KlXCKlwyNDwRBsHxLqPKCLlJSEyVY2mNZ zLLRzLtRR9ldjFHRlyyWMzpGUjFgNxM= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-375-DEwJ5IVyMXKGQHQ4fK2TUA-1; Wed, 07 Sep 2022 11:45:44 -0400 X-MC-Unique: DEwJ5IVyMXKGQHQ4fK2TUA-1 Received: from smtp.corp.redhat.com (int-mx10.intmail.prod.int.rdu2.redhat.com [10.11.54.10]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 46F98101A58E; Wed, 7 Sep 2022 15:45:43 +0000 (UTC) Received: from firesoul.localdomain (unknown [10.40.208.22]) by smtp.corp.redhat.com (Postfix) with ESMTP id DBCC6403167; Wed, 7 Sep 2022 15:45:42 +0000 (UTC) Received: from [192.168.42.3] (localhost [IPv6:::1]) by firesoul.localdomain (Postfix) with ESMTP id 199C530721A6C; Wed, 7 Sep 2022 17:45:41 +0200 (CEST) Subject: [PATCH RFCv2 bpf-next 08/18] i40e: refactor i40e_rx_checksum with helper From: Jesper Dangaard Brouer To: bpf@vger.kernel.org Cc: Jesper Dangaard Brouer , netdev@vger.kernel.org, xdp-hints@xdp-project.net, larysa.zaremba@intel.com, memxor@gmail.com, Lorenzo Bianconi , mtahhan@redhat.com, Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko , dave@dtucker.co.uk, Magnus Karlsson , bjorn@kernel.org Date: Wed, 07 Sep 2022 17:45:41 +0200 Message-ID: <166256554106.1434226.11099369196515014657.stgit@firesoul> In-Reply-To: <166256538687.1434226.15760041133601409770.stgit@firesoul> References: <166256538687.1434226.15760041133601409770.stgit@firesoul> User-Agent: StGit/1.4 MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.85 on 10.11.54.10 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: bpf@iogearbox.net X-Patchwork-State: RFC No functional change, this is in preparation for later patches. The helper function does not depend on skb, which will be used in later patches. Signed-off-by: Jesper Dangaard Brouer --- drivers/net/ethernet/intel/i40e/i40e_txrx.c | 66 ++++++++++++++++----------- 1 file changed, 40 insertions(+), 26 deletions(-) diff --git a/drivers/net/ethernet/intel/i40e/i40e_txrx.c b/drivers/net/ethernet/intel/i40e/i40e_txrx.c index f6ba97a0166e..a7a896321880 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_txrx.c +++ b/drivers/net/ethernet/intel/i40e/i40e_txrx.c @@ -1751,45 +1751,38 @@ bool i40e_alloc_rx_buffers(struct i40e_ring *rx_ring, u16 cleaned_count) return true; } -/** - * i40e_rx_checksum - Indicate in skb if hw indicated a good cksum - * @vsi: the VSI we care about - * @skb: skb currently being received and modified - * @rx_desc: the receive descriptor - **/ -static inline void i40e_rx_checksum(struct i40e_vsi *vsi, - struct sk_buff *skb, - union i40e_rx_desc *rx_desc) +struct i40e_rx_checksum_ret { + u16 ip_summed; + u16 csum_level; +}; + +static inline struct i40e_rx_checksum_ret +_i40e_rx_checksum(struct i40e_vsi *vsi, + u64 qword, + struct i40e_rx_ptype_decoded decoded) { - struct i40e_rx_ptype_decoded decoded; + struct i40e_rx_checksum_ret ret = {}; u32 rx_error, rx_status; bool ipv4, ipv6; - u8 ptype; - u64 qword; - qword = le64_to_cpu(rx_desc->wb.qword1.status_error_len); - ptype = (qword & I40E_RXD_QW1_PTYPE_MASK) >> I40E_RXD_QW1_PTYPE_SHIFT; rx_error = (qword & I40E_RXD_QW1_ERROR_MASK) >> I40E_RXD_QW1_ERROR_SHIFT; rx_status = (qword & I40E_RXD_QW1_STATUS_MASK) >> I40E_RXD_QW1_STATUS_SHIFT; - decoded = decode_rx_desc_ptype(ptype); - skb->ip_summed = CHECKSUM_NONE; - - skb_checksum_none_assert(skb); + ret.ip_summed = CHECKSUM_NONE; /* Rx csum enabled and ip headers found? */ if (!(vsi->netdev->features & NETIF_F_RXCSUM)) - return; + return ret; /* did the hardware decode the packet and checksum? */ if (!(rx_status & BIT(I40E_RX_DESC_STATUS_L3L4P_SHIFT))) - return; + return ret; /* both known and outer_ip must be set for the below code to work */ if (!(decoded.known && decoded.outer_ip)) - return; + return ret; ipv4 = (decoded.outer_ip == I40E_RX_PTYPE_OUTER_IP) && (decoded.outer_ip_ver == I40E_RX_PTYPE_OUTER_IPV4); @@ -1805,7 +1798,7 @@ static inline void i40e_rx_checksum(struct i40e_vsi *vsi, if (ipv6 && rx_status & BIT(I40E_RX_DESC_STATUS_IPV6EXADD_SHIFT)) /* don't increment checksum err here, non-fatal err */ - return; + return ret; /* there was some L4 error, count error and punt packet to the stack */ if (rx_error & BIT(I40E_RX_DESC_ERROR_L4E_SHIFT)) @@ -1816,30 +1809,51 @@ static inline void i40e_rx_checksum(struct i40e_vsi *vsi, * the csum. */ if (rx_error & BIT(I40E_RX_DESC_ERROR_PPRS_SHIFT)) - return; + return ret; /* If there is an outer header present that might contain a checksum * we need to bump the checksum level by 1 to reflect the fact that * we are indicating we validated the inner checksum. */ if (decoded.tunnel_type >= I40E_RX_PTYPE_TUNNEL_IP_GRENAT) - skb->csum_level = 1; + ret.csum_level = 1; /* Only report checksum unnecessary for TCP, UDP, or SCTP */ switch (decoded.inner_prot) { case I40E_RX_PTYPE_INNER_PROT_TCP: case I40E_RX_PTYPE_INNER_PROT_UDP: case I40E_RX_PTYPE_INNER_PROT_SCTP: - skb->ip_summed = CHECKSUM_UNNECESSARY; + ret.ip_summed = CHECKSUM_UNNECESSARY; fallthrough; default: break; } - return; + return ret; checksum_fail: vsi->back->hw_csum_rx_error++; + return ret; +} + +/** + * i40e_rx_checksum - Indicate in skb if hw indicated a good cksum + * @vsi: the VSI we care about + * @skb: skb currently being received and modified + * @rx_desc: the receive descriptor + **/ +static inline void i40e_rx_checksum(struct i40e_vsi *vsi, + struct sk_buff *skb, + union i40e_rx_desc *rx_desc) +{ + struct i40e_rx_checksum_ret ret; + u64 qword = le64_to_cpu(rx_desc->wb.qword1.status_error_len); + u8 ptype = (qword & I40E_RXD_QW1_PTYPE_MASK) >> I40E_RXD_QW1_PTYPE_SHIFT; + struct i40e_rx_ptype_decoded decoded = decode_rx_desc_ptype(ptype); + + ret = _i40e_rx_checksum(vsi, qword, decoded); + skb->ip_summed = ret.ip_summed; + skb->csum_level = ret.csum_level; } /**