From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751234AbeDYGni (ORCPT ); Wed, 25 Apr 2018 02:43:38 -0400 Received: from bombadil.infradead.org ([198.137.202.133]:51198 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750882AbeDYGnh (ORCPT ); Wed, 25 Apr 2018 02:43:37 -0400 Date: Tue, 24 Apr 2018 23:43:35 -0700 From: Christoph Hellwig To: Daniel Vetter Cc: Christoph Hellwig , Christian =?iso-8859-1?Q?K=F6nig?= , "moderated list:DMA BUFFER SHARING FRAMEWORK" , Linux Kernel Mailing List , amd-gfx list , Jerome Glisse , dri-devel , Dan Williams , Logan Gunthorpe , "open list:DMA BUFFER SHARING FRAMEWORK" , Thierry Reding Subject: Re: [Linaro-mm-sig] [PATCH 4/8] dma-buf: add peer2peer flag Message-ID: <20180425064335.GB28100@infradead.org> References: <3e17afc5-7d6c-5795-07bd-f23e34cf8d4b@gmail.com> <20180420101755.GA11400@infradead.org> <20180420124625.GA31078@infradead.org> <20180420152111.GR31310@phenom.ffwll.local> <20180424184847.GA3247@infradead.org> <20180425054855.GA17038@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.9.2 (2017-12-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Apr 25, 2018 at 08:23:15AM +0200, Daniel Vetter wrote: > For more fun: > > https://www.spinics.net/lists/dri-devel/msg173630.html > > Yeah, sometimes we want to disable the iommu because the on-gpu > pagetables are faster ... I am not on this list, but remote NAK from here. This needs an API from the iommu/dma-mapping code. Drivers have no business poking into these details. Thierry, please resend this with at least the iommu list and linux-arm-kernel in Cc to have a proper discussion on the right API. From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christoph Hellwig Subject: Re: [Linaro-mm-sig] [PATCH 4/8] dma-buf: add peer2peer flag Date: Tue, 24 Apr 2018 23:43:35 -0700 Message-ID: <20180425064335.GB28100@infradead.org> References: <3e17afc5-7d6c-5795-07bd-f23e34cf8d4b@gmail.com> <20180420101755.GA11400@infradead.org> <20180420124625.GA31078@infradead.org> <20180420152111.GR31310@phenom.ffwll.local> <20180424184847.GA3247@infradead.org> <20180425054855.GA17038@infradead.org> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Content-Disposition: inline In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" To: Daniel Vetter Cc: "moderated list:DMA BUFFER SHARING FRAMEWORK" , Linux Kernel Mailing List , amd-gfx list , Christoph Hellwig , Jerome Glisse , dri-devel , Dan Williams , Thierry Reding , Logan Gunthorpe , Christian =?iso-8859-1?Q?K=F6nig?= , "open list:DMA BUFFER SHARING FRAMEWORK" List-Id: dri-devel@lists.freedesktop.org T24gV2VkLCBBcHIgMjUsIDIwMTggYXQgMDg6MjM6MTVBTSArMDIwMCwgRGFuaWVsIFZldHRlciB3 cm90ZToKPiBGb3IgbW9yZSBmdW46Cj4gCj4gaHR0cHM6Ly93d3cuc3Bpbmljcy5uZXQvbGlzdHMv ZHJpLWRldmVsL21zZzE3MzYzMC5odG1sCj4gCj4gWWVhaCwgc29tZXRpbWVzIHdlIHdhbnQgdG8g ZGlzYWJsZSB0aGUgaW9tbXUgYmVjYXVzZSB0aGUgb24tZ3B1Cj4gcGFnZXRhYmxlcyBhcmUgZmFz dGVyIC4uLgoKSSBhbSBub3Qgb24gdGhpcyBsaXN0LCBidXQgcmVtb3RlIE5BSyBmcm9tIGhlcmUu ICBUaGlzIG5lZWRzIGFuCkFQSSBmcm9tIHRoZSBpb21tdS9kbWEtbWFwcGluZyBjb2RlLiAgRHJp dmVycyBoYXZlIG5vIGJ1c2luZXNzIHBva2luZwppbnRvIHRoZXNlIGRldGFpbHMuCgpUaGllcnJ5 LCBwbGVhc2UgcmVzZW5kIHRoaXMgd2l0aCBhdCBsZWFzdCB0aGUgaW9tbXUgbGlzdCBhbmQKbGlu dXgtYXJtLWtlcm5lbCBpbiBDYyB0byBoYXZlIGEgcHJvcGVyIGRpc2N1c3Npb24gb24gdGhlIHJp Z2h0IEFQSS4KX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18K ZHJpLWRldmVsIG1haWxpbmcgbGlzdApkcmktZGV2ZWxAbGlzdHMuZnJlZWRlc2t0b3Aub3JnCmh0 dHBzOi8vbGlzdHMuZnJlZWRlc2t0b3Aub3JnL21haWxtYW4vbGlzdGluZm8vZHJpLWRldmVsCg==