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Subject[PATCH 0/7] of: setup dma parameters using dma-ranges and dma-coherent
Date
Based on comments from [1] discussion, it seems there is a need to
have a generic support to configure dma device parameters.
Series introduces support for setting up dma parameters based on
device tree properties like 'dma-ranges' and 'dma-coherent'.

The 'dma-ranges' helps to take care of few DMAable system memory restrictions
by use of dma_pfn_offset which we maintain now per device. Arch code then
uses it for dma address translations for such cases. We also setup
dma_mask accordingly during the device creation process.

The 'dma-coherent' property is used to setup coherent dma_ops. Arches
which are always coherent can make use of ARCH_IS_DMA_COHERENT to setup
coherent dma_ops always irrespective of 'dma-coherent' property.

Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Olof Johansson <olof@lixom.net>
Cc: Grant Likely <grant.likely@linaro.org>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Grygorii Strashko <grygorii.strashko@ti.com>

Grygorii Strashko (3):
of: introduce of_dma_get_range() helper
of: configure the platform device dma_mask and dma_pfn_offset
ARM: dma: Use dma_pfn_offset for dma address translation

Santosh Shilimkar (4):
device: introduce per device dma_pfn_offset
of: introduce of_dma_is_coherent() helper
of: Add set_arch_dma_coherent_ops() and setup coherent dma_ops
ARM: dma: implement set_arch_dma_coherent_ops()

arch/arm/include/asm/dma-mapping.h | 24 ++++-
drivers/of/platform.c | 196 +++++++++++++++++++++++++++++++++++-
include/linux/device.h | 2 +
include/linux/dma-mapping.h | 7 ++
include/linux/of_platform.h | 14 +++
5 files changed, 236 insertions(+), 7 deletions(-)

Regards,
Santosh
[1] http://www.spinics.net/lists/arm-kernel/msg311678.html
--
1.7.9.5



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