From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wg0-f44.google.com (mail-wg0-f44.google.com [74.125.82.44]) by kanga.kvack.org (Postfix) with ESMTP id 9D8386B0071 for ; Tue, 3 Feb 2015 16:45:43 -0500 (EST) Received: by mail-wg0-f44.google.com with SMTP id z12so47145195wgg.3 for ; Tue, 03 Feb 2015 13:45:43 -0800 (PST) Received: from mout.kundenserver.de (mout.kundenserver.de. [212.227.126.131]) by mx.google.com with ESMTPS id mw9si331779wib.48.2015.02.03.13.45.41 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 03 Feb 2015 13:45:42 -0800 (PST) From: Arnd Bergmann Subject: Re: [Linaro-mm-sig] [RFCv3 2/2] dma-buf: add helpers for sharing attacher constraints with dma-parms Date: Tue, 03 Feb 2015 22:44:53 +0100 Message-ID: <19028710.jGRCggLuRk@wuerfel> In-Reply-To: References: <1422347154-15258-1-git-send-email-sumit.semwal@linaro.org> <20150203165829.GW8656@n2100.arm.linux.org.uk> MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" Sender: owner-linux-mm@kvack.org List-ID: To: linaro-kernel@lists.linaro.org Cc: Rob Clark , Russell King - ARM Linux , Tomasz Stanislawski , LKML , DRI mailing list , "linaro-mm-sig@lists.linaro.org" , "linux-mm@kvack.org" , Daniel Vetter , Robin Murphy , "linux-arm-kernel@lists.infradead.org" , "linux-media@vger.kernel.org" On Tuesday 03 February 2015 12:35:34 Rob Clark wrote: > > I can't think of cases outside of GPU's.. if it were more common I'd > be in favor of teaching dma api about multiple contexts, but right now > I think that would just amount to forcing a lot of churn on everyone > else for the benefit of GPU's. We have a couple of users of the iommu API at the moment outside of GPUs: * drivers/media/platform/omap3isp/isp.c * drivers/remoteproc/remoteproc_core.c * drivers/infiniband/hw/usnic/usnic_uiom.c * drivers/vfio/ I assume we will see a few more over time. The vfio case is the most important one here, since that is what the iommu API was designed for. Arnd -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org