clean up and modularize arch dma_mapping interface V2

From	Christoph Hellwig <hch@lst.de>
Newsgroups	linux.kernel
Subject	clean up and modularize arch dma_mapping interface V2
Date	2017-06-16 20:20 +0200
Message-ID	<tT40F-3II-1@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

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Hi all,

for a while we have a generic implementation of the dma mapping routines
that call into per-arch or per-device operations.  But right now there
still are various bits in the interfaces where don't clearly operate
on these ops.  This series tries to clean up a lot of those (but not all
yet, but the series is big enough).  It gets rid of the DMA_ERROR_CODE
way of signaling failures of the mapping routines from the
implementations to the generic code (and cleans up various drivers that
were incorrectly using it), and gets rid of the ->set_dma_mask routine
in favor of relying on the ->dma_capable method that can be used in
the same way, but which requires less code duplication.

I've got a good number of reviews last time, but a few are still missing.
I'd love to not have to re-spam everyone with this patchbomb, so early
ACKs (or complaints) are welcome.

I plan to create a new dma-mapping tree to collect all this work.
Any volunteers for co-maintainers, especially from the iommu gang?

The whole series is also available in git:

    git://git.infradead.org/users/hch/misc.git dma-map

Gitweb:

    http://git.infradead.org/users/hch/misc.git/shortlog/refs/heads/dma-map

Changes since V1:
 - remove two lines of code from arm dmabounce
 - a few commit message tweaks
 - lots of ACKs

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clean up and modularize arch dma_mapping interface V2 Christoph Hellwig <hch@lst.de> - 2017-06-16 20:20 +0200
  [PATCH 44/44] powerpc: merge __dma_set_mask into dma_set_mask Christoph Hellwig <hch@lst.de> - 2017-06-16 20:20 +0200
  [PATCH 38/44] arm: implement ->dma_supported instead of ->set_dma_mask Christoph Hellwig <hch@lst.de> - 2017-06-16 20:20 +0200
  [PATCH 36/44] dma-mapping: remove HAVE_ARCH_DMA_SUPPORTED Christoph Hellwig <hch@lst.de> - 2017-06-16 20:20 +0200
  [PATCH 42/44] powerpc/cell: use the dma_supported method for ops switching Christoph Hellwig <hch@lst.de> - 2017-06-16 20:20 +0200
    Re: [PATCH 42/44] powerpc/cell: use the dma_supported method for  ops switching Benjamin Herrenschmidt <benh@kernel.crashing.org> - 2017-06-17 23:00 +0200
      Re: [PATCH 42/44] powerpc/cell: use the dma_supported method for ops  switching Christoph Hellwig <hch@infradead.org> - 2017-06-18 09:20 +0200
        Re: [PATCH 42/44] powerpc/cell: use the dma_supported method for  ops switching Benjamin Herrenschmidt <benh@kernel.crashing.org> - 2017-06-18 12:00 +0200
  [PATCH 27/44] sparc: remove leon_dma_ops Christoph Hellwig <hch@lst.de> - 2017-06-16 20:20 +0200
  [PATCH 31/44] hexagon: remove arch-specific dma_supported implementation Christoph Hellwig <hch@lst.de> - 2017-06-16 20:20 +0200
  [PATCH 34/44] arm: remove arch specific dma_supported implementation Christoph Hellwig <hch@lst.de> - 2017-06-16 20:20 +0200
  [PATCH 29/44] dma-noop: remove dma_supported and mapping_error methods Christoph Hellwig <hch@lst.de> - 2017-06-16 20:20 +0200
  [PATCH 40/44] tile: remove dma_supported and mapping_error methods Christoph Hellwig <hch@lst.de> - 2017-06-16 20:20 +0200
  [PATCH 41/44] powerpc/cell: clean up fixed mapping dma_ops initialization Christoph Hellwig <hch@lst.de> - 2017-06-16 20:20 +0200
  [PATCH 33/44] openrisc: remove arch-specific dma_supported implementation Christoph Hellwig <hch@lst.de> - 2017-06-16 20:20 +0200
  [PATCH 39/44] xen-swiotlb: remove xen_swiotlb_set_dma_mask Christoph Hellwig <hch@lst.de> - 2017-06-16 20:20 +0200
  [PATCH 17/44] hexagon: switch to use ->mapping_error for error reporting Christoph Hellwig <hch@lst.de> - 2017-06-16 20:20 +0200
  [PATCH 35/44] x86: remove arch specific dma_supported implementation Christoph Hellwig <hch@lst.de> - 2017-06-16 20:20 +0200
  [PATCH 32/44] hexagon: remove the unused dma_is_consistent prototype Christoph Hellwig <hch@lst.de> - 2017-06-16 20:20 +0200
  [PATCH 13/44] openrisc: remove DMA_ERROR_CODE Christoph Hellwig <hch@lst.de> - 2017-06-16 20:20 +0200
  [PATCH 37/44] mips/loongson64: implement ->dma_supported instead of ->set_dma_mask Christoph Hellwig <hch@lst.de> - 2017-06-16 20:20 +0200
  [PATCH 15/44] xtensa: remove DMA_ERROR_CODE Christoph Hellwig <hch@lst.de> - 2017-06-16 20:20 +0200
  [PATCH 24/44] x86: remove DMA_ERROR_CODE Christoph Hellwig <hch@lst.de> - 2017-06-16 20:20 +0200
  [PATCH 28/44] sparc: remove arch specific dma_supported implementations Christoph Hellwig <hch@lst.de> - 2017-06-16 20:20 +0200
  [PATCH 02/44] ibmveth: properly unwind on init errors Christoph Hellwig <hch@lst.de> - 2017-06-16 20:20 +0200
  [PATCH 01/44] firmware/ivc: use dma_mapping_error Christoph Hellwig <hch@lst.de> - 2017-06-16 20:20 +0200
  [PATCH 43/44] dma-mapping: remove the set_dma_mask method Christoph Hellwig <hch@lst.de> - 2017-06-16 20:20 +0200
  [PATCH 30/44] dma-virt: remove dma_supported and mapping_error methods Christoph Hellwig <hch@lst.de> - 2017-06-16 20:20 +0200
  [PATCH 26/44] dma-mapping: remove DMA_ERROR_CODE Christoph Hellwig <hch@lst.de> - 2017-06-16 20:30 +0200
  [PATCH 16/44] arm64: remove DMA_ERROR_CODE Christoph Hellwig <hch@lst.de> - 2017-06-16 20:30 +0200
  [PATCH 21/44] powerpc: implement ->mapping_error Christoph Hellwig <hch@lst.de> - 2017-06-16 20:30 +0200
  [PATCH 14/44] sh: remove DMA_ERROR_CODE Christoph Hellwig <hch@lst.de> - 2017-06-16 20:30 +0200
  [PATCH 19/44] s390: implement ->mapping_error Christoph Hellwig <hch@lst.de> - 2017-06-16 20:30 +0200
  [PATCH 25/44] arm: implement ->mapping_error Christoph Hellwig <hch@lst.de> - 2017-06-16 20:30 +0200
  [PATCH 23/44] x86/calgary: implement ->mapping_error Christoph Hellwig <hch@lst.de> - 2017-06-16 20:30 +0200
  [PATCH 06/44] iommu/dma: don't rely on DMA_ERROR_CODE Christoph Hellwig <hch@lst.de> - 2017-06-16 20:30 +0200
    Re: [PATCH 06/44] iommu/dma: don't rely on DMA_ERROR_CODE Robin Murphy <robin.murphy@arm.com> - 2017-06-19 17:20 +0200
  [PATCH 18/44] iommu/amd: implement ->mapping_error Christoph Hellwig <hch@lst.de> - 2017-06-16 20:30 +0200
  [PATCH 20/44] sparc: implement ->mapping_error Christoph Hellwig <hch@lst.de> - 2017-06-16 20:30 +0200
  [PATCH 10/44] ia64: remove DMA_ERROR_CODE Christoph Hellwig <hch@lst.de> - 2017-06-16 20:30 +0200
  [PATCH 08/44] xen-swiotlb: implement ->mapping_error Christoph Hellwig <hch@lst.de> - 2017-06-16 20:30 +0200
  [PATCH 03/44] dmaengine: ioat: don't use DMA_ERROR_CODE Christoph Hellwig <hch@lst.de> - 2017-06-16 20:30 +0200
    Re: [PATCH 03/44] dmaengine: ioat: don't use DMA_ERROR_CODE Alexander Duyck <alexander.duyck@gmail.com> - 2017-06-16 22:50 +0200
      Re: [PATCH 03/44] dmaengine: ioat: don't use DMA_ERROR_CODE Christoph Hellwig <hch@infradead.org> - 2017-06-18 09:10 +0200
  [PATCH 04/44] drm/exynos: don't use DMA_ERROR_CODE Christoph Hellwig <hch@lst.de> - 2017-06-16 20:30 +0200
  [PATCH 09/44] c6x: remove DMA_ERROR_CODE Christoph Hellwig <hch@lst.de> - 2017-06-16 20:30 +0200
  [PATCH 07/44] xen-swiotlb: consolidate xen_swiotlb_dma_ops Christoph Hellwig <hch@lst.de> - 2017-06-16 20:30 +0200
  [PATCH 11/44] m32r: remove DMA_ERROR_CODE Christoph Hellwig <hch@lst.de> - 2017-06-16 20:30 +0200
  [PATCH 22/44] x86/pci-nommu: implement ->mapping_error Christoph Hellwig <hch@lst.de> - 2017-06-16 20:30 +0200
  [PATCH 12/44] microblaze: remove DMA_ERROR_CODE Christoph Hellwig <hch@lst.de> - 2017-06-16 20:30 +0200
  [PATCH 05/44] drm/armada: don't abuse DMA_ERROR_CODE Christoph Hellwig <hch@lst.de> - 2017-06-16 20:30 +0200

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