From patchwork Fri Aug 13 11:47:47 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lorenzo Bianconi X-Patchwork-Id: 12435333 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 X-Spam-Level: X-Spam-Status: No, score=-19.7 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,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 79E1FC4338F for ; Fri, 13 Aug 2021 11:49:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5EA276109D for ; Fri, 13 Aug 2021 11:49:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239846AbhHMLuJ (ORCPT ); Fri, 13 Aug 2021 07:50:09 -0400 Received: from mail.kernel.org ([198.145.29.99]:44808 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239093AbhHMLuI (ORCPT ); Fri, 13 Aug 2021 07:50:08 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 1E7B9610FA; Fri, 13 Aug 2021 11:49:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1628855382; bh=KDr7aNf/6csWbD8I4k36IqoJmLWW3yRDq6maMsstik8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=iUzG0+UDo5xH9atzzOxu/096zwv9KrHHTLN0xl5EByiz2qiFmwdBcldBMjXT1MXu7 0veTvElnWErSG+CBDgGp1z/So3ElgaAieO0XMJUFq+urSnTESSf026yX/CQf9vZX8v mbzIuiNqy8Kl8bOlpnXxWffyzwRp1nKshwfKKnqLno9T2EsC5VPiVdUxW9L6kzf6W3 O7rnA4wGhk0Ghcj3MIbPfTO/UzSTvqesz4V1GoStSJ9yc4q1/MANmVjR7/uhB592tq 7Ej4x1zchr70aHipc3u+gaR714pQ6GszbECrWLm5QdHm06v4ot6sTr+koouwZJP5FP Fkk4FMq54Qp0w== From: Lorenzo Bianconi To: bpf@vger.kernel.org, netdev@vger.kernel.org Cc: lorenzo.bianconi@redhat.com, davem@davemloft.net, kuba@kernel.org, ast@kernel.org, daniel@iogearbox.net, shayagr@amazon.com, john.fastabend@gmail.com, dsahern@kernel.org, brouer@redhat.com, echaudro@redhat.com, jasowang@redhat.com, alexander.duyck@gmail.com, saeed@kernel.org, maciej.fijalkowski@intel.com, magnus.karlsson@intel.com, tirthendu.sarkar@intel.com, toke@redhat.com Subject: [PATCH v11 bpf-next 06/18] net: marvell: rely on xdp_update_skb_shared_info utility routine Date: Fri, 13 Aug 2021 13:47:47 +0200 Message-Id: <19df740fdeea1a84456e9912c13f836efc19fd74.1628854454.git.lorenzo@kernel.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org X-Patchwork-Delegate: bpf@iogearbox.net Rely on xdp_update_skb_shared_info routine in order to avoid resetting frags array in skb_shared_info structure building the skb in mvneta_swbm_build_skb(). Frags array is expected to be initialized by the receiving driver building the xdp_buff and here we just need to update memory metadata. Signed-off-by: Lorenzo Bianconi --- drivers/net/ethernet/marvell/mvneta.c | 35 +++++++++++++++------------ 1 file changed, 20 insertions(+), 15 deletions(-) diff --git a/drivers/net/ethernet/marvell/mvneta.c b/drivers/net/ethernet/marvell/mvneta.c index cbf614d6b993..b996eb49d813 100644 --- a/drivers/net/ethernet/marvell/mvneta.c +++ b/drivers/net/ethernet/marvell/mvneta.c @@ -2304,11 +2304,19 @@ mvneta_swbm_add_rx_fragment(struct mvneta_port *pp, skb_frag_size_set(frag, data_len); __skb_frag_set_page(frag, page); - if (!xdp_buff_is_mb(xdp)) + if (!xdp_buff_is_mb(xdp)) { + sinfo->xdp_frags_size = *size; xdp_buff_set_mb(xdp); + } + if (page_is_pfmemalloc(page)) + xdp_buff_set_frag_pfmemalloc(xdp); } else { page_pool_put_full_page(rxq->page_pool, page, true); } + + /* last fragment */ + if (len == *size) + sinfo->xdp_frags_tsize = sinfo->nr_frags * PAGE_SIZE; *size -= len; } @@ -2316,13 +2324,18 @@ static struct sk_buff * mvneta_swbm_build_skb(struct mvneta_port *pp, struct page_pool *pool, struct xdp_buff *xdp, u32 desc_status) { - struct skb_shared_info *sinfo = xdp_get_shared_info_from_buff(xdp); + unsigned int size, truesize; struct sk_buff *skb; u8 num_frags; - int i; - if (unlikely(xdp_buff_is_mb(xdp))) + if (unlikely(xdp_buff_is_mb(xdp))) { + struct skb_shared_info *sinfo; + + sinfo = xdp_get_shared_info_from_buff(xdp); + truesize = sinfo->xdp_frags_tsize; + size = sinfo->xdp_frags_size; num_frags = sinfo->nr_frags; + } skb = build_skb(xdp->data_hard_start, PAGE_SIZE); if (!skb) @@ -2334,18 +2347,10 @@ mvneta_swbm_build_skb(struct mvneta_port *pp, struct page_pool *pool, skb_put(skb, xdp->data_end - xdp->data); skb->ip_summed = mvneta_rx_csum(pp, desc_status); - if (likely(!xdp_buff_is_mb(xdp))) - goto out; - - for (i = 0; i < num_frags; i++) { - skb_frag_t *frag = &sinfo->frags[i]; - - skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, - skb_frag_page(frag), skb_frag_off(frag), - skb_frag_size(frag), PAGE_SIZE); - } + if (unlikely(xdp_buff_is_mb(xdp))) + xdp_update_skb_shared_info(skb, num_frags, size, truesize, + xdp_buff_is_frag_pfmemalloc(xdp)); -out: return skb; }