From patchwork Thu Oct 12 17:34:13 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jakub Kicinski X-Patchwork-Id: 824995 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=netdev-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=netronome-com.20150623.gappssmtp.com header.i=@netronome-com.20150623.gappssmtp.com header.b="RL4rIMPs"; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 3yCdKM0zgNz9t2r for ; Fri, 13 Oct 2017 04:35:19 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752879AbdJLRe5 (ORCPT ); Thu, 12 Oct 2017 13:34:57 -0400 Received: from mail-pf0-f179.google.com ([209.85.192.179]:54662 "EHLO mail-pf0-f179.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752704AbdJLRey (ORCPT ); Thu, 12 Oct 2017 13:34:54 -0400 Received: by mail-pf0-f179.google.com with SMTP id m28so5826798pfi.11 for ; Thu, 12 Oct 2017 10:34:54 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=netronome-com.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=kJB1qNw3WjzsE2VxPCm+fK2YhFtI+oYlMf8yggtAovM=; b=RL4rIMPs8TP5RPf9YBOlCtc6RggSSGnIUYf+kuQj2FWv2ZhSWDPPLeC7SuXG1WkgVX iRG9A0J+UMxuE6RDqJn/u2JaUA2ykapThbgCP1PcQjIgF44EOqRdi86BsgUqF+fh5cx/ KqlUPwK+amrLgrbT7PZqFD6JVK1vuL4gc5W+O0WLxPhHbsXa3t9CVjsViHTWXy17cnKc zkPQZ8GRZ3YX1b3amp2HCikWJH1ZLXFjdXnju/gq2z8ZmrLZL0WDRWDOIriu7xTTaM4f 3MAscPjJBrearLFJy1WCdvvkC0ci3ccTr6RVHcFIIRvyKGsDRaicthx3ozZCQxQ0BhOA 07lA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=kJB1qNw3WjzsE2VxPCm+fK2YhFtI+oYlMf8yggtAovM=; b=gVgOK9Vgi/piqsgj/jCijAMyCMcdZ03yzoQ4xqlbSv5ZiZJOCKCCwWRsQ4nSPTWQ6v OxByRDUizeEtkdGqqY2PcYwjuL5Y6lwDGioeDywDJEcDCw57fNWUzK+W+oi17E1lRiUW KqQLUvewENzGGPGtQ/wyMnQ7YTdA3N6SK47VBkcce7fd7DGfrCRtafwGevQNE7nmupbm IS1gdVez6UwH+RpIXjyuuax/OCCXLmhgeAmDu1Q639jEaVGaYRzx7CsibWOoul2XXZMM r2mttqBXKOJJMKMDv14rp9VMkubOibGCIptbUxE7VSSm5t2HoVux/alPkt5wPNb8fyiF o/1w== X-Gm-Message-State: AMCzsaXCEo3KueeYC1EwS7FU2Qc9TkyeGnzFFUT/f0BcJkKacYl5aO1C CnFDyNPuSHhtmvAkVePcRtv6+Szn X-Google-Smtp-Source: AOwi7QCvKGV6UryKnlJ6UxfPBqfzYfUFGxN1QQ87vqDLLhUOsOnHpwqwSt39zObjcs0IR/oBwsIPeg== X-Received: by 10.159.233.133 with SMTP id bh5mr812604plb.28.1507829693983; Thu, 12 Oct 2017 10:34:53 -0700 (PDT) Received: from jkicinski-Precision-T1700.netronome.com ([75.53.12.129]) by smtp.gmail.com with ESMTPSA id q8sm25037929pfk.100.2017.10.12.10.34.53 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Thu, 12 Oct 2017 10:34:53 -0700 (PDT) From: Jakub Kicinski To: netdev@vger.kernel.org Cc: oss-drivers@netronome.com, Jakub Kicinski Subject: [PATCH net-next 07/12] nfp: bpf: support BPF offload only on little endian Date: Thu, 12 Oct 2017 10:34:13 -0700 Message-Id: <20171012173418.4029-8-jakub.kicinski@netronome.com> X-Mailer: git-send-email 2.14.1 In-Reply-To: <20171012173418.4029-1-jakub.kicinski@netronome.com> References: <20171012173418.4029-1-jakub.kicinski@netronome.com> Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org eBPF is host-endian specific. Translating both BE and LE eBPF to the NFP is feasible, but would require quite a bit of indirection. The fact that I don't have access to any BE hosts that would fit a 25G/40G/100G NIC is also limiting my ability to test big endian. For now restrict the offload to little endian hosts only. Signed-off-by: Jakub Kicinski Reviewed-by: Simon Horman --- drivers/net/ethernet/netronome/nfp/bpf/main.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/net/ethernet/netronome/nfp/bpf/main.c b/drivers/net/ethernet/netronome/nfp/bpf/main.c index 074726980994..6e74f8db1cc1 100644 --- a/drivers/net/ethernet/netronome/nfp/bpf/main.c +++ b/drivers/net/ethernet/netronome/nfp/bpf/main.c @@ -42,9 +42,11 @@ static bool nfp_net_ebpf_capable(struct nfp_net *nn) { +#ifdef __LITTLE_ENDIAN if (nn->cap & NFP_NET_CFG_CTRL_BPF && nn_readb(nn, NFP_NET_CFG_BPF_ABI) == NFP_NET_BPF_ABI) return true; +#endif return false; }