From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.2 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 991DAC4727F for ; Tue, 22 Sep 2020 10:56:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4F57F2396D for ; Tue, 22 Sep 2020 10:56:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726654AbgIVK4b (ORCPT ); Tue, 22 Sep 2020 06:56:31 -0400 Received: from elvis.franken.de ([193.175.24.41]:51141 "EHLO elvis.franken.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726513AbgIVK41 (ORCPT ); Tue, 22 Sep 2020 06:56:27 -0400 Received: from uucp (helo=alpha) by elvis.franken.de with local-bsmtp (Exim 3.36 #1) id 1kKfxs-000822-01; Tue, 22 Sep 2020 12:56:04 +0200 Received: by alpha.franken.de (Postfix, from userid 1000) id 9FA31C0FFF; Tue, 22 Sep 2020 10:53:14 +0200 (CEST) Date: Tue, 22 Sep 2020 10:53:14 +0200 From: Thomas Bogendoerfer To: Christoph Hellwig Cc: Mauro Carvalho Chehab , "James E.J. Bottomley" , Joonyoung Shim , Seung-Woo Kim , Ben Skeggs , Marek Szyprowski , Tomasz Figa , Matt Porter , iommu@lists.linux-foundation.org, Stefan Richter , linux1394-devel@lists.sourceforge.net, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mips@vger.kernel.org, linux-parisc@vger.kernel.org, linux-samsung-soc@vger.kernel.org, nouveau@lists.freedesktop.org, netdev@vger.kernel.org, linux-scsi@vger.kernel.org, linux-mm@kvack.org, alsa-devel@alsa-project.org Subject: Re: [PATCH 15/18] dma-mapping: add a new dma_alloc_pages API Message-ID: <20200922085314.GI8477@alpha.franken.de> References: <20200915155122.1768241-1-hch@lst.de> <20200915155122.1768241-16-hch@lst.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200915155122.1768241-16-hch@lst.de> User-Agent: Mutt/1.5.23 (2014-03-12) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Sep 15, 2020 at 05:51:19PM +0200, Christoph Hellwig wrote: > This API is the equivalent of alloc_pages, except that the returned memory > is guaranteed to be DMA addressable by the passed in device. The > implementation will also be used to provide a more sensible replacement > for DMA_ATTR_NON_CONSISTENT flag. > > Additionally dma_alloc_noncoherent is switched over to use dma_alloc_pages > as its backend. > > Signed-off-by: Christoph Hellwig > --- > Documentation/core-api/dma-attributes.rst | 8 --- > arch/alpha/kernel/pci_iommu.c | 2 + > arch/arm/mm/dma-mapping-nommu.c | 2 + > arch/arm/mm/dma-mapping.c | 4 ++ > arch/ia64/hp/common/sba_iommu.c | 2 + > arch/mips/jazz/jazzdma.c | 7 +-- > arch/powerpc/kernel/dma-iommu.c | 2 + > arch/powerpc/platforms/ps3/system-bus.c | 4 ++ > arch/powerpc/platforms/pseries/vio.c | 2 + > arch/s390/pci/pci_dma.c | 2 + > arch/x86/kernel/amd_gart_64.c | 2 + > drivers/iommu/dma-iommu.c | 2 + > drivers/iommu/intel/iommu.c | 4 ++ > drivers/parisc/ccio-dma.c | 2 + > drivers/parisc/sba_iommu.c | 2 + > drivers/xen/swiotlb-xen.c | 2 + > include/linux/dma-direct.h | 5 ++ > include/linux/dma-mapping.h | 34 ++++++------ > include/linux/dma-noncoherent.h | 3 -- > kernel/dma/direct.c | 52 ++++++++++++++++++- > kernel/dma/mapping.c | 63 +++++++++++++++++++++-- > kernel/dma/ops_helpers.c | 35 +++++++++++++ > kernel/dma/virt.c | 2 + > 23 files changed, 206 insertions(+), 37 deletions(-) Acked-by: Thomas Bogendoerfer (MIPS part) -- Crap can work. Given enough thrust pigs will fly, but it's not necessarily a good idea. [ RFC1925, 2.3 ]