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[209.132.183.28]) by mx.google.com with ESMTPS id k35si1513371qtc.318.2019.01.29.11.54.29 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 29 Jan 2019 11:54:29 -0800 (PST) Received-SPF: pass (google.com: domain of jglisse@redhat.com designates 209.132.183.28 as permitted sender) client-ip=209.132.183.28; Authentication-Results: mx.google.com; spf=pass (google.com: domain of jglisse@redhat.com designates 209.132.183.28 as permitted sender) smtp.mailfrom=jglisse@redhat.com; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=redhat.com Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 49AA689AC5; Tue, 29 Jan 2019 19:54:28 +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 537BF600CC; Tue, 29 Jan 2019 19:54:25 +0000 (UTC) Date: Tue, 29 Jan 2019 14:54:23 -0500 From: Jerome Glisse To: Logan Gunthorpe Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, Greg Kroah-Hartman , "Rafael J . Wysocki" , Bjorn Helgaas , Christian Koenig , Felix Kuehling , Jason Gunthorpe , linux-pci@vger.kernel.org, dri-devel@lists.freedesktop.org, Christoph Hellwig , Marek Szyprowski , Robin Murphy , Joerg Roedel , iommu@lists.linux-foundation.org Subject: Re: [RFC PATCH 2/5] drivers/base: add a function to test peer to peer capability Message-ID: <20190129195421.GJ3176@redhat.com> References: <20190129174728.6430-1-jglisse@redhat.com> <20190129174728.6430-3-jglisse@redhat.com> <98d345af-7928-2a50-7bc4-582916dfac80@deltatee.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <98d345af-7928-2a50-7bc4-582916dfac80@deltatee.com> User-Agent: Mutt/1.10.1 (2018-07-13) X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.26]); Tue, 29 Jan 2019 19:54:28 +0000 (UTC) X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Tue, Jan 29, 2019 at 11:26:01AM -0700, Logan Gunthorpe wrote: > > > On 2019-01-29 10:47 a.m., jglisse@redhat.com 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. > > This doesn't appear to be used in any of the further patches; so it's > very confusing. > > I'm not sure a struct device wrapper is really necessary... I wanted to allow other non pci device to join in the fun but yes right now i have only be doing this on pci devices. Jérôme