From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jerome Glisse Subject: Re: [RFC PATCH 2/5] drivers/base: add a function to test peer to peer capability Date: Tue, 29 Jan 2019 14:54:23 -0500 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-Transfer-Encoding: 8bit Return-path: Content-Disposition: inline In-Reply-To: <98d345af-7928-2a50-7bc4-582916dfac80@deltatee.com> Sender: linux-kernel-owner@vger.kernel.org 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 List-Id: iommu@lists.linux-foundation.org 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