[PATCHv3 0/3] arm:dma-mapping Refactoring iommu dma-mapping code

[ritesh.harjani at gmail.com]

From: Ritesh Harjani <ritesh.harjani at gmail.com>

Hi All, 

This patch series is to refactor iommu related common code from
arch/arm/dma-mapping.c to lib/iommu-helper.c based on the various
discussions with the maintainers/experts [1].

Currently the only user of the common lib/iommu-helper code will
be ARM & ARM64 but later various architecture might try to use this
iommu lib helper functions.

Major change of this refactoring depends on bringing out struct dma_iommu_mapping 
*mapping variable from arch/arm/include/asm/device.h to include/linux/device.h
and by moving out complete structure definition of dma_iommu_mapping to
inclue/linux/iommu-helper.h. These changes are now part of this patch series based
on Greg's(cc'd) comments[2].

There are 1/2 more function definitions which I can think of moving out, but
those can be done once this patch series is approved as those are not very
big changes.

Also, this has been tested and verified on ARM hardware with IOMMU support.

Changes v2 -> v3:
1. Included changes in device.h in this patch series[1/3] itself, as Greg
mentioned that there is no point in approving device.h changes without actual
refactoring changes gets approved [2].

So, I guess device.h changes should be fine but let Greg confirms it.


Links:
[1]: https://www.mail-archive.com/iommu@lists.linux-foundation.org/msg03458.html 
[2]: https://lkml.org/lkml/2014/6/4/458


Ritesh Harjani (3):
  device.h: arm dma-iommu: Move out dma_iommu_mapping struct
  arm: dma-mapping: Refactor attach/detach, alloc/free func
  arm:dma-iommu: Move out complete func defs

 arch/arm/Kconfig                          |  46 +--
 arch/arm/include/asm/device.h             |   9 -
 arch/arm/include/asm/dma-iommu.h          |  16 +-
 arch/arm/mm/dma-mapping.c                 | 578 +++---------------------------
 drivers/gpu/drm/exynos/exynos_drm_iommu.c |  10 +-
 include/linux/device.h                    |   5 +
 include/linux/iommu-helper.h              |  61 ++++
 lib/iommu-helper.c                        | 562 +++++++++++++++++++++++++++++
 8 files changed, 710 insertions(+), 577 deletions(-)

-- 
1.8.1.3