From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dpdk.org (dpdk.org [92.243.14.124]) by dpdk.space (Postfix) with ESMTP id 08AA2A0679 for ; Wed, 3 Apr 2019 15:22:51 +0200 (CEST) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 0A81F1B442; Wed, 3 Apr 2019 15:22:23 +0200 (CEST) Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by dpdk.org (Postfix) with ESMTP id E4EFF1B439 for ; Wed, 3 Apr 2019 15:22:20 +0200 (CEST) X-Amp-Result: UNSCANNABLE X-Amp-File-Uploaded: False Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by orsmga101.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 03 Apr 2019 06:22:19 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.60,304,1549958400"; d="scan'208";a="139798587" Received: from bricha3-mobl.ger.corp.intel.com ([10.237.221.35]) by fmsmga007.fm.intel.com with SMTP; 03 Apr 2019 06:22:16 -0700 Received: by (sSMTP sendmail emulation); Wed, 03 Apr 2019 14:22:15 +0100 Date: Wed, 3 Apr 2019 14:22:15 +0100 From: Bruce Richardson To: Ferruh Yigit Cc: Xiaolong Ye , dev@dpdk.org, Stephen Hemminger , Qi Zhang , Karlsson Magnus , Topel Bjorn , Maxime Coquelin , Luca Boccassi , Ananyev Konstantin , David Marchand , Andrew Rybchenko , Olivier Matz Message-ID: <20190403132214.GA1309@bricha3-MOBL.ger.corp.intel.com> References: <20190301080947.91086-1-xiaolong.ye@intel.com> <20190402154653.711-1-xiaolong.ye@intel.com> <20190402154653.711-2-xiaolong.ye@intel.com> <3b489dd8-c70f-94d1-163f-1cf3199f1cf5@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Disposition: inline In-Reply-To: <3b489dd8-c70f-94d1-163f-1cf3199f1cf5@intel.com> User-Agent: Mutt/1.11.4 (2019-03-13) Subject: Re: [dpdk-dev] [PATCH v9 1/1] net/af_xdp: introduce AF XDP PMD driver X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" Message-ID: <20190403132215.O5OcOQvGrdQGMSH7tOs7MZ73iJPi1uOsx-87j-CBF7A@z> On Tue, Apr 02, 2019 at 08:43:48PM +0100, Ferruh Yigit wrote: > On 4/2/2019 4:46 PM, Xiaolong Ye wrote: > > Add a new PMD driver for AF_XDP which is a proposed faster version of > > AF_PACKET interface in Linux. More info about AF_XDP, please refer to [1] > > [2]. > > > > This is the vanilla version PMD which just uses a raw buffer registered as > > the umem. > > > > [1] https://fosdem.org/2018/schedule/event/af_xdp/ > > [2] https://lwn.net/Articles/745934/ > > > > Signed-off-by: Xiaolong Ye > > <...> > > > @@ -0,0 +1,956 @@ > > +/* SPDX-License-Identifier: BSD-3-Clause > > + * Copyright(c) 2019 Intel Corporation. > > + */ > > > +#include > > +#include > > Under linux, both headers are in same 'bpf' folder, why one included as > 'bpf/bpf.h' but other 'xsk.h'? > > Perhaps this is not problem when headers are installed into system folders, but > I am compiling using RTE_KERNELDIR, which used in Makefile as: > -I$(RTE_KERNELDIR)/tools/lib/bpf When installed in system folders they will still need the "bpf" prefix. On my system after running "make headers_install" in libbpf folder, the headers are placed in "/usr/local/include/bpf/" > > This fails to find 'bpf/bpf.h' > > Also for '-lbpf', shouldn't need to add '-L$(RTE_KERNELDIR)/tools/lib/bpf', to > new added line in 'rte.app.mk', so that it can find the library? > > I assume you are building in a system with new kernel, I think you need this for > functionality, where 'xsk.h' is located in that case? Because I was thinking > building and installing libbpf can solve the issue but it is not installing > 'xsk.h', not sure why, so not exactly solving. > > if you still need "CFLAGS += -I$(RTE_KERNELDIR)/tools/lib/bpf" for your case, > does it make sense update as following: > CFLAGS += -I$(RTE_KERNELDIR)/tools/lib > #include We should not include in any driver a cflag or ldflag that points to the kernel dir. We should expect the headers for libbpf in a regular include folder and the library itself in /usr/lib or /usr/local/lib. /Bruce