Automatic DMA configuration for OF-based IOMMU masters

Hi Olof,

Please consider pulling the following series for 3.19. I appreciate that this is late in the day, but the patches have been around for a while and have collected all the Acks that they need. Marek has already been finding the series useful with the Exynos IOMMU, so it seems a pity to hold the patches up any longer.

Cheers,

Will

--->8

The following changes since commit 5d01410fe4d92081f349b013a2e7a95429e4f2c9:

Linux 3.18-rc6 (2014-11-23 15:25:20 -0800)

are available in the git repository at:

git://git.kernel.org/pub/scm/linux/kernel/git/will/linux.git tags/of-iommu-configure

for you to fetch changes up to a42a7a1fb5f1f9004b023594609dc22da02fc08b:

iommu: store DT-probed IOMMU data privately (2014-12-05 14:35:52 +0000)

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This series adds automatic IOMMU and DMA-mapping configuration for OF-based DMA masters described using the generic IOMMU devicetree bindings. Although there is plenty of future work around splitting up iommu_ops, adding default IOMMU domains and sorting out automatic IOMMU group creation for the platform_bus, this is already useful enough for people to port over their IOMMU drivers and start using the new probing infrastructure (indeed, Marek has patches queued for the Exynos IOMMU).

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Marek Szyprowski (1):
iommu: fix initialization without 'add_device' callback

Robin Murphy (1):
iommu: store DT-probed IOMMU data privately

Will Deacon (7):
iommu: provide early initialisation hook for IOMMU drivers
dma-mapping: replace set_arch_dma_coherent_ops with arch_setup_dma_ops
iommu: add new iommu_ops callback for adding an OF device
iommu: provide helper function to configure an IOMMU for an of master
dma-mapping: detect and configure IOMMU in of_dma_configure
arm: call iommu_init before of_platform_populate
arm: dma-mapping: plumb our iommu mapping ops into arch_setup_dma_ops

 arch/arm/include/asm/dma-mapping.h | 12 ++---
 arch/arm/kernel/setup.c            |  2 +
 arch/arm/mm/dma-mapping.c          | 83 ++++++++++++++++++++++++++++++++---
 drivers/iommu/Kconfig              |  2 +-
 drivers/iommu/iommu.c              |  2 +-
 drivers/iommu/of_iommu.c           | 89 ++++++++++++++++++++++++++++++++++++++
 drivers/of/platform.c              | 50 +++++++++++----------
 include/asm-generic/vmlinux.lds.h  |  2 +
 include/linux/dma-mapping.h        | 13 +++---
 include/linux/iommu.h              |  8 ++++
 include/linux/of_iommu.h           | 23 ++++++++++
 11 files changed, 242 insertions(+), 44 deletions(-)

I've pulled it into a separate next/iommu-config branch in case we have to take it out again for some reason. The autobuilder has not found any regressions, so that's a good sign.

Arnd