From mboxrd@z Thu Jan 1 00:00:00 1970 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=-7.5 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SPF_PASS,URIBL_BLOCKED, USER_AGENT_MUTT 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 7F711C282C7 for ; Tue, 29 Jan 2019 20:00:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 58CBD20989 for ; Tue, 29 Jan 2019 20:00:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729341AbfA2UAg (ORCPT ); Tue, 29 Jan 2019 15:00:36 -0500 Received: from mx1.redhat.com ([209.132.183.28]:47440 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727763AbfA2UAg (ORCPT ); Tue, 29 Jan 2019 15:00:36 -0500 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 9EFEB811D8; Tue, 29 Jan 2019 20:00:35 +0000 (UTC) Received: from redhat.com (ovpn-122-2.rdu2.redhat.com [10.10.122.2]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 618B45C239; Tue, 29 Jan 2019 20:00:33 +0000 (UTC) Date: Tue, 29 Jan 2019 15:00:31 -0500 From: Jerome Glisse To: Alex Deucher Cc: linux-mm , Joerg Roedel , "Rafael J . Wysocki" , Greg Kroah-Hartman , Felix Kuehling , LKML , Maling list - DRI developers , Christoph Hellwig , iommu@lists.linux-foundation.org, Jason Gunthorpe , Linux PCI , Bjorn Helgaas , Robin Murphy , Logan Gunthorpe , Christian Koenig , Marek Szyprowski Subject: Re: [RFC PATCH 1/5] pci/p2p: add a function to test peer to peer capability Message-ID: <20190129200031.GL3176@redhat.com> References: <20190129174728.6430-1-jglisse@redhat.com> <20190129174728.6430-2-jglisse@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: User-Agent: Mutt/1.10.1 (2018-07-13) X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.27]); Tue, 29 Jan 2019 20:00:36 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Jan 29, 2019 at 02:56:38PM -0500, Alex Deucher wrote: > On Tue, Jan 29, 2019 at 12:47 PM wrote: > > > > From: Jérôme Glisse > > > > device_test_p2p() return true if two devices can peer to peer to > > each other. We add a generic function as different inter-connect > > can support peer to peer and we want to genericaly test this no > > matter what the inter-connect might be. However this version only > > support PCIE for now. > > > > What about something like these patches: > https://cgit.freedesktop.org/~deathsimple/linux/commit/?h=p2p&id=4fab9ff69cb968183f717551441b475fabce6c1c > https://cgit.freedesktop.org/~deathsimple/linux/commit/?h=p2p&id=f90b12d41c277335d08c9dab62433f27c0fadbe5 > They are a bit more thorough. Yes it would be better, i forgot about those. I can include them next time i post. Thank you for reminding me about those :) Cheers, Jérôme