From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thomas Bogendoerfer Subject: Re: [PATCH 15/18] dma-mapping: add a new dma_alloc_pages API Date: Tue, 22 Sep 2020 10:53:14 +0200 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 Return-path: Content-Disposition: inline In-Reply-To: <20200915155122.1768241-16-hch@lst.de> 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 List-Id: nouveau.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 ]