[PATCH v5 00/44] dma-mapping: Use unsigned long for dma_attrs
Daniel Vetter
daniel at ffwll.ch
Tue Jul 12 05:16:25 PDT 2016
On Thu, Jun 30, 2016 at 10:23:39AM +0200, Krzysztof Kozlowski wrote:
> Hi,
>
>
> This is fifth approach for replacing struct dma_attrs with unsigned
> long.
>
> The main patch (1/44) doing the change is split into many subpatches
> for easier review (2-42). They should be squashed together when
> applying.
For all the drm driver patches:
Acked-by: Daniel Vetter <daniel.vetter at ffwll.ch>
Should I pull these in through drm-misc, or do you prefer to merge them
through a special topic branch (with everything else) instead on your own?
-Daniel
>
>
> Rebased on v4.7-rc5.
>
> For easier testing the patchset is available here:
> repo: https://github.com/krzk/linux
> branch: for-next/dma-attrs-const-v5
>
>
> Changes since v4
> ================
> 1. Collect some acks. Still need more.
> 2. Minor fixes pointed by Robin Murphy.
> 3. Applied changes from Bart Van Assche's comment.
> 4. More tests and builds (using https://www.kernel.org/pub/tools/crosstool/).
>
>
> Changes since v3
> ================
> 1. Collect some acks.
> 2. Drop wrong patch 1/45 ("powerpc: dma-mapping: Don't hard-code
> the value of DMA_ATTR_WEAK_ORDERING").
> 3. Minor fix pointed out by Michael Ellerman.
>
>
> Changes since v2
> ================
> 1. Follow Christoph Hellwig's comments (don't use BIT add
> documentation, remove dma_get_attr).
>
>
> Rationale
> =========
> The dma-mapping core and the implementations do not change the
> DMA attributes passed by pointer. Thus the pointer can point to const
> data. However the attributes do not have to be a bitfield. Instead
> unsigned long will do fine:
>
> 1. This is just simpler. Both in terms of reading the code and setting
> attributes. Instead of initializing local attributes on the stack
> and passing pointer to it to dma_set_attr(), just set the bits.
>
> 2. It brings safeness and checking for const correctness because the
> attributes are passed by value.
>
>
> Best regards,
> Krzysztof
>
>
> Krzysztof Kozlowski (44):
> dma-mapping: Use unsigned long for dma_attrs
> alpha: dma-mapping: Use unsigned long for dma_attrs
> arc: dma-mapping: Use unsigned long for dma_attrs
> ARM: dma-mapping: Use unsigned long for dma_attrs
> arm64: dma-mapping: Use unsigned long for dma_attrs
> avr32: dma-mapping: Use unsigned long for dma_attrs
> blackfin: dma-mapping: Use unsigned long for dma_attrs
> c6x: dma-mapping: Use unsigned long for dma_attrs
> cris: dma-mapping: Use unsigned long for dma_attrs
> frv: dma-mapping: Use unsigned long for dma_attrs
> drm/exynos: dma-mapping: Use unsigned long for dma_attrs
> drm/mediatek: dma-mapping: Use unsigned long for dma_attrs
> drm/msm: dma-mapping: Use unsigned long for dma_attrs
> drm/nouveau: dma-mapping: Use unsigned long for dma_attrs
> drm/rockship: dma-mapping: Use unsigned long for dma_attrs
> infiniband: dma-mapping: Use unsigned long for dma_attrs
> iommu: dma-mapping: Use unsigned long for dma_attrs
> [media] dma-mapping: Use unsigned long for dma_attrs
> xen: dma-mapping: Use unsigned long for dma_attrs
> swiotlb: dma-mapping: Use unsigned long for dma_attrs
> powerpc: dma-mapping: Use unsigned long for dma_attrs
> video: dma-mapping: Use unsigned long for dma_attrs
> x86: dma-mapping: Use unsigned long for dma_attrs
> iommu: intel: dma-mapping: Use unsigned long for dma_attrs
> h8300: dma-mapping: Use unsigned long for dma_attrs
> hexagon: dma-mapping: Use unsigned long for dma_attrs
> ia64: dma-mapping: Use unsigned long for dma_attrs
> m68k: dma-mapping: Use unsigned long for dma_attrs
> metag: dma-mapping: Use unsigned long for dma_attrs
> microblaze: dma-mapping: Use unsigned long for dma_attrs
> mips: dma-mapping: Use unsigned long for dma_attrs
> mn10300: dma-mapping: Use unsigned long for dma_attrs
> nios2: dma-mapping: Use unsigned long for dma_attrs
> openrisc: dma-mapping: Use unsigned long for dma_attrs
> parisc: dma-mapping: Use unsigned long for dma_attrs
> misc: mic: dma-mapping: Use unsigned long for dma_attrs
> s390: dma-mapping: Use unsigned long for dma_attrs
> sh: dma-mapping: Use unsigned long for dma_attrs
> sparc: dma-mapping: Use unsigned long for dma_attrs
> tile: dma-mapping: Use unsigned long for dma_attrs
> unicore32: dma-mapping: Use unsigned long for dma_attrs
> xtensa: dma-mapping: Use unsigned long for dma_attrs
> dma-mapping: Remove dma_get_attr
> dma-mapping: Document the DMA attributes next to the declaration
>
> Documentation/DMA-API.txt | 33 +++---
> Documentation/DMA-attributes.txt | 2 +-
> arch/alpha/include/asm/dma-mapping.h | 2 -
> arch/alpha/kernel/pci-noop.c | 2 +-
> arch/alpha/kernel/pci_iommu.c | 12 +-
> arch/arc/mm/dma.c | 12 +-
> arch/arm/common/dmabounce.c | 4 +-
> arch/arm/include/asm/dma-mapping.h | 13 +--
> arch/arm/include/asm/xen/page-coherent.h | 16 +--
> arch/arm/mm/dma-mapping.c | 117 +++++++++----------
> arch/arm/xen/mm.c | 8 +-
> arch/arm64/mm/dma-mapping.c | 66 +++++------
> arch/avr32/mm/dma-coherent.c | 12 +-
> arch/blackfin/kernel/dma-mapping.c | 8 +-
> arch/c6x/include/asm/dma-mapping.h | 4 +-
> arch/c6x/kernel/dma.c | 9 +-
> arch/c6x/mm/dma-coherent.c | 4 +-
> arch/cris/arch-v32/drivers/pci/dma.c | 9 +-
> arch/frv/mb93090-mb00/pci-dma-nommu.c | 8 +-
> arch/frv/mb93090-mb00/pci-dma.c | 9 +-
> arch/h8300/kernel/dma.c | 8 +-
> arch/hexagon/include/asm/dma-mapping.h | 1 -
> arch/hexagon/kernel/dma.c | 8 +-
> arch/ia64/hp/common/sba_iommu.c | 22 ++--
> arch/ia64/include/asm/machvec.h | 1 -
> arch/ia64/kernel/pci-swiotlb.c | 4 +-
> arch/ia64/sn/pci/pci_dma.c | 22 ++--
> arch/m68k/kernel/dma.c | 12 +-
> arch/metag/kernel/dma.c | 16 +--
> arch/microblaze/include/asm/dma-mapping.h | 1 -
> arch/microblaze/kernel/dma.c | 12 +-
> arch/mips/cavium-octeon/dma-octeon.c | 8 +-
> arch/mips/loongson64/common/dma-swiotlb.c | 10 +-
> arch/mips/mm/dma-default.c | 20 ++--
> arch/mips/netlogic/common/nlm-dma.c | 4 +-
> arch/mn10300/mm/dma-alloc.c | 8 +-
> arch/nios2/mm/dma-mapping.c | 12 +-
> arch/openrisc/kernel/dma.c | 21 ++--
> arch/parisc/kernel/pci-dma.c | 18 +--
> arch/powerpc/include/asm/dma-mapping.h | 7 +-
> arch/powerpc/include/asm/iommu.h | 10 +-
> arch/powerpc/kernel/dma-iommu.c | 12 +-
> arch/powerpc/kernel/dma.c | 18 +--
> arch/powerpc/kernel/ibmebus.c | 12 +-
> arch/powerpc/kernel/iommu.c | 12 +-
> arch/powerpc/kernel/vio.c | 12 +-
> arch/powerpc/platforms/cell/iommu.c | 28 ++---
> arch/powerpc/platforms/pasemi/iommu.c | 2 +-
> arch/powerpc/platforms/powernv/npu-dma.c | 8 +-
> arch/powerpc/platforms/powernv/pci-ioda.c | 4 +-
> arch/powerpc/platforms/powernv/pci.c | 2 +-
> arch/powerpc/platforms/powernv/pci.h | 2 +-
> arch/powerpc/platforms/ps3/system-bus.c | 18 +--
> arch/powerpc/platforms/pseries/iommu.c | 6 +-
> arch/powerpc/sysdev/dart_iommu.c | 2 +-
> arch/s390/include/asm/dma-mapping.h | 1 -
> arch/s390/pci/pci_dma.c | 23 ++--
> arch/sh/include/asm/dma-mapping.h | 4 +-
> arch/sh/kernel/dma-nommu.c | 4 +-
> arch/sh/mm/consistent.c | 4 +-
> arch/sparc/kernel/iommu.c | 12 +-
> arch/sparc/kernel/ioport.c | 24 ++--
> arch/sparc/kernel/pci_sun4v.c | 12 +-
> arch/tile/kernel/pci-dma.c | 28 ++---
> arch/unicore32/mm/dma-swiotlb.c | 4 +-
> arch/x86/include/asm/dma-mapping.h | 5 +-
> arch/x86/include/asm/swiotlb.h | 4 +-
> arch/x86/include/asm/xen/page-coherent.h | 9 +-
> arch/x86/kernel/amd_gart_64.c | 20 ++--
> arch/x86/kernel/pci-calgary_64.c | 14 +--
> arch/x86/kernel/pci-dma.c | 4 +-
> arch/x86/kernel/pci-nommu.c | 4 +-
> arch/x86/kernel/pci-swiotlb.c | 4 +-
> arch/x86/pci/sta2x11-fixup.c | 2 +-
> arch/x86/pci/vmd.c | 16 +--
> arch/xtensa/kernel/pci-dma.c | 12 +-
> drivers/gpu/drm/exynos/exynos_drm_fbdev.c | 2 +-
> drivers/gpu/drm/exynos/exynos_drm_g2d.c | 12 +-
> drivers/gpu/drm/exynos/exynos_drm_gem.c | 20 ++--
> drivers/gpu/drm/exynos/exynos_drm_gem.h | 2 +-
> drivers/gpu/drm/mediatek/mtk_drm_gem.c | 13 +--
> drivers/gpu/drm/mediatek/mtk_drm_gem.h | 2 +-
> drivers/gpu/drm/msm/msm_drv.c | 13 +--
> .../gpu/drm/nouveau/nvkm/subdev/instmem/gk20a.c | 13 +--
> drivers/gpu/drm/rockchip/rockchip_drm_gem.c | 17 ++-
> drivers/gpu/drm/rockchip/rockchip_drm_gem.h | 2 +-
> drivers/infiniband/core/umem.c | 7 +-
> drivers/iommu/amd_iommu.c | 12 +-
> drivers/iommu/dma-iommu.c | 8 +-
> drivers/iommu/intel-iommu.c | 12 +-
> drivers/media/platform/sti/bdisp/bdisp-hw.c | 26 ++---
> drivers/media/v4l2-core/videobuf2-dma-contig.c | 30 ++---
> drivers/media/v4l2-core/videobuf2-dma-sg.c | 19 +--
> drivers/misc/mic/host/mic_boot.c | 20 ++--
> drivers/parisc/ccio-dma.c | 16 +--
> drivers/parisc/sba_iommu.c | 16 +--
> drivers/video/fbdev/omap2/omapfb/omapfb-main.c | 12 +-
> drivers/video/fbdev/omap2/omapfb/omapfb.h | 3 +-
> drivers/xen/swiotlb-xen.c | 14 +--
> include/linux/dma-attrs.h | 71 ------------
> include/linux/dma-iommu.h | 6 +-
> include/linux/dma-mapping.h | 128 ++++++++++++++-------
> include/linux/swiotlb.h | 10 +-
> include/media/videobuf2-dma-contig.h | 7 +-
> include/rdma/ib_verbs.h | 8 +-
> include/xen/swiotlb-xen.h | 12 +-
> lib/dma-noop.c | 9 +-
> lib/swiotlb.c | 13 ++-
> 108 files changed, 689 insertions(+), 789 deletions(-)
> delete mode 100644 include/linux/dma-attrs.h
>
> --
> 1.9.1
>
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--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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