Re: [PATCH 28/44] sparc: remove arch specific dma_supported implementations

clean up and modularize arch dma_mapping interface · Christoph Hellwig <hch@lst.de> · 2017-06-08
[PATCH 01/44] firmware/ivc: use dma_mapping_error · Christoph Hellwig <hch@lst.de> · 2017-06-08
Re: [PATCH 01/44] firmware/ivc: use dma_mapping_error · Thierry Reding <hidden> · 2017-06-13
[PATCH 02/44] ibmveth: properly unwind on init errors · Christoph Hellwig <hch@lst.de> · 2017-06-08
Re: [PATCH 02/44] ibmveth: properly unwind on init errors · David Miller <davem@davemloft.net> · 2017-06-08
[PATCH 04/44] drm/exynos: don't use DMA_ERROR_CODE · Christoph Hellwig <hch@lst.de> · 2017-06-08
[PATCH 06/44] iommu/dma: don't rely on DMA_ERROR_CODE · Christoph Hellwig <hch@lst.de> · 2017-06-08
Re: [PATCH 06/44] iommu/dma: don't rely on DMA_ERROR_CODE · Robin Murphy <robin.murphy@arm.com> · 2017-06-08
Re: [PATCH 06/44] iommu/dma: don't rely on DMA_ERROR_CODE · Christoph Hellwig <hch@lst.de> · 2017-06-16
[PATCH 07/44] xen-swiotlb: consolidate xen_swiotlb_dma_ops · Christoph Hellwig <hch@lst.de> · 2017-06-08
Re: [PATCH 07/44] xen-swiotlb: consolidate xen_swiotlb_dma_ops · Konrad Rzeszutek Wilk <hidden> · 2017-06-11
[PATCH 08/44] xen-swiotlb: implement ->mapping_error · Christoph Hellwig <hch@lst.de> · 2017-06-08
Re: [PATCH 08/44] xen-swiotlb: implement ->mapping_error · Konrad Rzeszutek Wilk <hidden> · 2017-06-11
[PATCH 13/44] openrisc: remove DMA_ERROR_CODE · Christoph Hellwig <hch@lst.de> · 2017-06-08
[PATCH 12/44] microblaze: remove DMA_ERROR_CODE · Christoph Hellwig <hch@lst.de> · 2017-06-08
[PATCH 10/44] ia64: remove DMA_ERROR_CODE · Christoph Hellwig <hch@lst.de> · 2017-06-08
[PATCH 15/44] xtensa: remove DMA_ERROR_CODE · Christoph Hellwig <hch@lst.de> · 2017-06-08
[PATCH 17/44] hexagon: switch to use ->mapping_error for error reporting · Christoph Hellwig <hch@lst.de> · 2017-06-08
Re: [PATCH 17/44] hexagon: switch to use ->mapping_error for error reporting · Richard Kuo <hidden> · 2017-06-16
[PATCH 19/44] s390: implement ->mapping_error · Christoph Hellwig <hch@lst.de> · 2017-06-08
Re: [PATCH 19/44] s390: implement ->mapping_error · Gerald Schaefer <hidden> · 2017-06-08
[PATCH 18/44] iommu/amd: implement ->mapping_error · Christoph Hellwig <hch@lst.de> · 2017-06-08
[PATCH 23/44] x86/calgary: implement ->mapping_error · Christoph Hellwig <hch@lst.de> · 2017-06-08
[PATCH 24/44] x86: remove DMA_ERROR_CODE · Christoph Hellwig <hch@lst.de> · 2017-06-08
[PATCH 27/44] sparc: remove leon_dma_ops · Christoph Hellwig <hch@lst.de> · 2017-06-08
Re: [PATCH 27/44] sparc: remove leon_dma_ops · David Miller <davem@davemloft.net> · 2017-06-08
Re: [PATCH 27/44] sparc: remove leon_dma_ops · Andreas Larsson <andreas@gaisler.com> · 2017-06-12
Re: [PATCH 27/44] sparc: remove leon_dma_ops · Christoph Hellwig <hch@lst.de> · 2017-06-16
[PATCH 28/44] sparc: remove arch specific dma_supported implementations · Christoph Hellwig <hch@lst.de> · 2017-06-08
Re: [PATCH 28/44] sparc: remove arch specific dma_supported implementations · Julian Calaby <hidden> · 2017-06-08
Re: [PATCH 28/44] sparc: remove arch specific dma_supported implementations · Christoph Hellwig <hch@lst.de> · 2017-06-16
Re: [PATCH 28/44] sparc: remove arch specific dma_supported implementations · David Miller <davem@davemloft.net> · 2017-06-08
[PATCH 26/44] dma-mapping: remove DMA_ERROR_CODE · Christoph Hellwig <hch@lst.de> · 2017-06-08
[PATCH 30/44] dma-virt: remove dma_supported and mapping_error methods · Christoph Hellwig <hch@lst.de> · 2017-06-08
[PATCH 33/44] openrisc: remove arch-specific dma_supported implementation · Christoph Hellwig <hch@lst.de> · 2017-06-08
Re: [PATCH 33/44] openrisc: remove arch-specific dma_supported implementation · Geert Uytterhoeven <geert@linux-m68k.org> · 2017-06-09
Re: [PATCH 33/44] openrisc: remove arch-specific dma_supported implementation · Christoph Hellwig <hch@lst.de> · 2017-06-16
[PATCH 31/44] hexagon: remove arch-specific dma_supported implementation · Christoph Hellwig <hch@lst.de> · 2017-06-08
Re: [PATCH 31/44] hexagon: remove arch-specific dma_supported implementation · Richard Kuo <hidden> · 2017-06-16
[PATCH 36/44] dma-mapping: remove HAVE_ARCH_DMA_SUPPORTED · Christoph Hellwig <hch@lst.de> · 2017-06-08
[PATCH 37/44] mips/loongson64: implement ->dma_supported instead of ->set_dma_mask · Christoph Hellwig <hch@lst.de> · 2017-06-08
[PATCH 38/44] arm: implement ->dma_supported instead of ->set_dma_mask · Christoph Hellwig <hch@lst.de> · 2017-06-08
[PATCH 42/44] powerpc/cell: use the dma_supported method for ops switching · Christoph Hellwig <hch@lst.de> · 2017-06-08
[PATCH 41/44] powerpc/cell: clean up fixed mapping dma_ops initialization · Christoph Hellwig <hch@lst.de> · 2017-06-08
[PATCH 44/44] powerpc: merge __dma_set_mask into dma_set_mask · Christoph Hellwig <hch@lst.de> · 2017-06-08
[PATCH 43/44] dma-mapping: remove the set_dma_mask method · Christoph Hellwig <hch@lst.de> · 2017-06-08
[PATCH 40/44] tile: remove dma_supported and mapping_error methods · Christoph Hellwig <hch@lst.de> · 2017-06-08
[PATCH 39/44] xen-swiotlb: remove xen_swiotlb_set_dma_mask · Christoph Hellwig <hch@lst.de> · 2017-06-08
[PATCH 35/44] x86: remove arch specific dma_supported implementation · Christoph Hellwig <hch@lst.de> · 2017-06-08
[PATCH 32/44] hexagon: remove the unused dma_is_consistent prototype · Christoph Hellwig <hch@lst.de> · 2017-06-08
[PATCH 34/44] arm: remove arch specific dma_supported implementation · Christoph Hellwig <hch@lst.de> · 2017-06-08
[PATCH 29/44] dma-noop: remove dma_supported and mapping_error methods · Christoph Hellwig <hch@lst.de> · 2017-06-08
[PATCH 25/44] arm: implement ->mapping_error · Christoph Hellwig <hch@lst.de> · 2017-06-08
Re: [PATCH 25/44] arm: implement ->mapping_error · Russell King - ARM Linux <linux@armlinux.org.uk> · 2017-06-08
Re: [PATCH 25/44] arm: implement ->mapping_error · Christoph Hellwig <hch@lst.de> · 2017-06-16
[PATCH 22/44] x86/pci-nommu: implement ->mapping_error · Christoph Hellwig <hch@lst.de> · 2017-06-08
[PATCH 21/44] powerpc: implement ->mapping_error · Christoph Hellwig <hch@lst.de> · 2017-06-08
Re: [PATCH 21/44] powerpc: implement ->mapping_error · Michael Ellerman <mpe@ellerman.id.au> · 2017-06-14
[PATCH 20/44] sparc: implement ->mapping_error · Christoph Hellwig <hch@lst.de> · 2017-06-08
Re: [PATCH 20/44] sparc: implement ->mapping_error · David Miller <davem@davemloft.net> · 2017-06-08
[PATCH 16/44] arm64: remove DMA_ERROR_CODE · Christoph Hellwig <hch@lst.de> · 2017-06-08
Re: [PATCH 16/44] arm64: remove DMA_ERROR_CODE · Robin Murphy <robin.murphy@arm.com> · 2017-06-08
[PATCH 14/44] sh: remove DMA_ERROR_CODE · Christoph Hellwig <hch@lst.de> · 2017-06-08
[PATCH 11/44] m32r: remove DMA_ERROR_CODE · Christoph Hellwig <hch@lst.de> · 2017-06-08
[PATCH 09/44] c6x: remove DMA_ERROR_CODE · Christoph Hellwig <hch@lst.de> · 2017-06-08
[PATCH 05/44] drm/armada: don't abuse DMA_ERROR_CODE · Christoph Hellwig <hch@lst.de> · 2017-06-08
[PATCH 03/44] dmaengine: ioat: don't use DMA_ERROR_CODE · Christoph Hellwig <hch@lst.de> · 2017-06-08
Re: [PATCH 03/44] dmaengine: ioat: don't use DMA_ERROR_CODE · Dave Jiang <dave.jiang@intel.com> · 2017-06-08
Re: [PATCH 03/44] dmaengine: ioat: don't use DMA_ERROR_CODE · Vinod Koul <hidden> · 2017-06-14
Re: clean up and modularize arch dma_mapping interface · David Miller <davem@davemloft.net> · 2017-06-08
Re: clean up and modularize arch dma_mapping interface · Daniel Vetter <hidden> · 2017-06-20
Re: clean up and modularize arch dma_mapping interface · Christoph Hellwig <hch@lst.de> · 2017-06-20

From: Christoph Hellwig <hch@lst.de>
Date: 2017-06-16 08:47:07
Also in: dri-devel, linux-arm-kernel, linux-iommu, linux-mips, linux-samsung-soc, linux-sh, linux-tegra, lkml, netdev, sparclinux

On Fri, Jun 09, 2017 at 12:22:48AM +1000, Julian Calaby wrote:

I'm guessing there's a few places that have DMA ops but DMA isn't
actually supported. Why not have a common method for this, maybe
"dma_not_supported"?

It's not common at all.  Except for sbus all dma API user first
call set_dma_mask which ends up in the dma_supported call.  sbus
is the weird outlier here.

`h`	back out one level
`j`	next message in thread
`k`	previous message in thread
`l`	drill in
`Esc`	close help / fold thread tree
`?`	toggle this help