From patchwork Thu Jun 10 08:21:58 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xuan Zhuo X-Patchwork-Id: 458355 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=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, UNPARSEABLE_RELAY, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable 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 26F52C49EA7 for ; Thu, 10 Jun 2021 08:22:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0C40961403 for ; Thu, 10 Jun 2021 08:22:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231159AbhFJIYX (ORCPT ); Thu, 10 Jun 2021 04:24:23 -0400 Received: from out30-45.freemail.mail.aliyun.com ([115.124.30.45]:46307 "EHLO out30-45.freemail.mail.aliyun.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230507AbhFJIYL (ORCPT ); Thu, 10 Jun 2021 04:24:11 -0400 X-Alimail-AntiSpam: AC=PASS; BC=-1|-1; BR=01201311R901e4; CH=green; DM=||false|; DS=||; FP=0|-1|-1|-1|0|-1|-1|-1; HT=e01e04400; MF=xuanzhuo@linux.alibaba.com; NM=1; PH=DS; RN=21; SR=0; TI=SMTPD_---0UbxDLwc_1623313330; Received: from localhost(mailfrom:xuanzhuo@linux.alibaba.com fp:SMTPD_---0UbxDLwc_1623313330) by smtp.aliyun-inc.com(127.0.0.1); Thu, 10 Jun 2021 16:22:11 +0800 From: Xuan Zhuo To: netdev@vger.kernel.org Cc: "David S. Miller" , Jakub Kicinski , "Michael S. Tsirkin" , Jason Wang , =?utf-8?b?QmrDtnJuIFTDtnBlbA==?= , Magnus Karlsson , Jonathan Lemon , Alexei Starovoitov , Daniel Borkmann , Jesper Dangaard Brouer , John Fastabend , Andrii Nakryiko , Martin KaFai Lau , Song Liu , Yonghong Song , KP Singh , Xuan Zhuo , virtualization@lists.linux-foundation.org, bpf@vger.kernel.org, "dust . li" Subject: [PATCH net-next v5 04/15] xsk: XDP_SETUP_XSK_POOL support option IFF_NOT_USE_DMA_ADDR Date: Thu, 10 Jun 2021 16:21:58 +0800 Message-Id: <20210610082209.91487-5-xuanzhuo@linux.alibaba.com> X-Mailer: git-send-email 2.31.0 In-Reply-To: <20210610082209.91487-1-xuanzhuo@linux.alibaba.com> References: <20210610082209.91487-1-xuanzhuo@linux.alibaba.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Some devices, such as virtio-net, do not directly use dma addr. These devices do not initialize dma after completing the xsk setup, so the dma check is skipped here. Signed-off-by: Xuan Zhuo Reviewed-by: Dust Li Acked-by: Magnus Karlsson --- net/xdp/xsk_buff_pool.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/xdp/xsk_buff_pool.c b/net/xdp/xsk_buff_pool.c index 8de01aaac4a0..a7e434de0308 100644 --- a/net/xdp/xsk_buff_pool.c +++ b/net/xdp/xsk_buff_pool.c @@ -171,7 +171,7 @@ int xp_assign_dev(struct xsk_buff_pool *pool, if (err) goto err_unreg_pool; - if (!pool->dma_pages) { + if (!(netdev->priv_flags & IFF_NOT_USE_DMA_ADDR) && !pool->dma_pages) { WARN(1, "Driver did not DMA map zero-copy buffers"); err = -EINVAL; goto err_unreg_xsk;