From patchwork Thu May 14 10:50:29 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jesper Dangaard Brouer X-Patchwork-Id: 219254 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=-6.9 required=3.0 tests=DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS 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 B71CCC433DF for ; Thu, 14 May 2020 10:50:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 905AA20575 for ; Thu, 14 May 2020 10:50:47 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="e5Jpz2bJ" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727116AbgENKuq (ORCPT ); Thu, 14 May 2020 06:50:46 -0400 Received: from us-smtp-2.mimecast.com ([207.211.31.81]:44269 "EHLO us-smtp-delivery-1.mimecast.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727098AbgENKun (ORCPT ); Thu, 14 May 2020 06:50:43 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1589453442; 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=UCdO9GIbmXvKJcfcTXYpA04NQOdCRGMOmMqqJpuzEPA=; b=e5Jpz2bJ9oKzS6PZTj/QBewrn60XTQGrJkk79uzcjFLn468bw3RstGaNtuXWU31xLhv/D6 kbTIFtVaObln1loLxMA8XAJeS3J3MYIHx1xB0lt+fv1QY4kZumE+PN65rtI5xda8ucmAUO Vw5eikOV/7hqPyo3nAc6O2PZohhKibg= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-267-f6x7UodAMuOfjuS-m-caDw-1; Thu, 14 May 2020 06:50:38 -0400 X-MC-Unique: f6x7UodAMuOfjuS-m-caDw-1 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id B2B03107ACCA; Thu, 14 May 2020 10:50:36 +0000 (UTC) Received: from firesoul.localdomain (unknown [10.40.208.32]) by smtp.corp.redhat.com (Postfix) with ESMTP id 46D0A7D95E; Thu, 14 May 2020 10:50:30 +0000 (UTC) Received: from [192.168.42.3] (localhost [IPv6:::1]) by firesoul.localdomain (Postfix) with ESMTP id 2E139300020FC; Thu, 14 May 2020 12:50:29 +0200 (CEST) Subject: [PATCH net-next v4 18/33] nfp: add XDP frame size to netronome driver From: Jesper Dangaard Brouer To: sameehj@amazon.com Cc: Jesper Dangaard Brouer , netdev@vger.kernel.org, bpf@vger.kernel.org, =?utf-8?q?Toke_H=C3=B8iland-J=C3=B8rgensen?= , Daniel Borkmann , Alexei Starovoitov , "David S. Miller" , John Fastabend , Alexander Duyck , Jeff Kirsher , David Ahern , Ilias Apalodimas , Lorenzo Bianconi , Saeed Mahameed , Tariq Toukan Date: Thu, 14 May 2020 12:50:29 +0200 Message-ID: <158945342911.97035.11214251236208648808.stgit@firesoul> In-Reply-To: <158945314698.97035.5286827951225578467.stgit@firesoul> References: <158945314698.97035.5286827951225578467.stgit@firesoul> User-Agent: StGit/0.19 MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org The netronome nfp driver use PAGE_SIZE when xdp_prog is set, but xdp.data_hard_start begins at offset NFP_NET_RX_BUF_HEADROOM. Thus, adjust for this when setting xdp.frame_sz, as it counts from data_hard_start. When doing XDP_TX this driver is smart and instead of a full DMA-map does a DMA-sync on with packet length. As xdp_adjust_tail can now grow packet length, add checks to make sure that grow size is within the DMA-mapped size. Cc: Jakub Kicinski Signed-off-by: Jesper Dangaard Brouer Reviewed-by: Jakub Kicinski --- .../net/ethernet/netronome/nfp/nfp_net_common.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c index 9bfb3b077bc1..0e0cc3d58bdc 100644 --- a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c +++ b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c @@ -1741,10 +1741,15 @@ nfp_net_tx_xdp_buf(struct nfp_net_dp *dp, struct nfp_net_rx_ring *rx_ring, struct nfp_net_rx_buf *rxbuf, unsigned int dma_off, unsigned int pkt_len, bool *completed) { + unsigned int dma_map_sz = dp->fl_bufsz - NFP_NET_RX_BUF_NON_DATA; struct nfp_net_tx_buf *txbuf; struct nfp_net_tx_desc *txd; int wr_idx; + /* Reject if xdp_adjust_tail grow packet beyond DMA area */ + if (pkt_len + dma_off > dma_map_sz) + return false; + if (unlikely(nfp_net_tx_full(tx_ring, 1))) { if (!*completed) { nfp_net_xdp_complete(tx_ring); @@ -1817,6 +1822,7 @@ static int nfp_net_rx(struct nfp_net_rx_ring *rx_ring, int budget) rcu_read_lock(); xdp_prog = READ_ONCE(dp->xdp_prog); true_bufsz = xdp_prog ? PAGE_SIZE : dp->fl_bufsz; + xdp.frame_sz = PAGE_SIZE - NFP_NET_RX_BUF_HEADROOM; xdp.rxq = &rx_ring->xdp_rxq; tx_ring = r_vec->xdp_ring;