Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756283Ab1D2A34 (ORCPT ); Thu, 28 Apr 2011 20:29:56 -0400 Received: from gate.crashing.org ([63.228.1.57]:50942 "EHLO gate.crashing.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753070Ab1D2A3z (ORCPT ); Thu, 28 Apr 2011 20:29:55 -0400 Subject: Re: [Linaro-mm-sig] [RFC] ARM DMA mapping TODO, v1 From: Benjamin Herrenschmidt To: Jerome Glisse Cc: Russell King - ARM Linux , FUJITA Tomonori , Arnd Bergmann , linux-kernel@vger.kernel.org, linaro-mm-sig@lists.linaro.org, linux-arm-kernel@lists.infradead.org In-Reply-To: References: <201104212129.17013.arnd@arndb.de> <201104281428.56780.arnd@arndb.de> <20110428131531.GK17290@n2100.arm.linux.org.uk> <201104281629.52863.arnd@arndb.de> <20110428143440.GP17290@n2100.arm.linux.org.uk> Content-Type: text/plain; charset="UTF-8" Date: Fri, 29 Apr 2011 10:29:22 +1000 Message-ID: <1304036962.2513.202.camel@pasglop> Mime-Version: 1.0 X-Mailer: Evolution 2.30.3 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 756 Lines: 19 On Thu, 2011-04-28 at 15:37 -0400, Jerome Glisse wrote: > Jesse also pointed out space exhaustion inside the iommu and i believe > this should also be considered. This is why i believe the dma_* api is > not well suited. In DRM/TTM we use pci_dma_mapping* and we also play > with with page set_page*_uc|wc|wb. Which are yet another set of completely x86-centric APIs that have not been thought in the context of other architectures and are probably mostly unimplementables on half of them :-) Cheers, Ben. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/