[PATCH v3 0/7] of: setup dma parameters using dma-ranges and dma-coherent

Santosh Shilimkar
2014-04-24T15:31:06Z

Here is an updated v3 of the series. Series introduces support for setting up
dma parameters based on device tree properties like 'dma-ranges' and
'dma-coherent' and also update to ARM 32 bit port. Earlier version of the
series can be found here [3], [2] and [1].

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 update the
dma_pfn_offset accordingly during DT the device creation process.The
'dma-coherent' property is used to setup arch's coherent dma_ops.

Hopefully with acks, tested-by this version can get into 3.16 queue. I will
post a followup series for Keystone SOC which will use this infrastructure.
Linus W also wants to use this for ARM integrator platform dma offset issue.

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 (2):
of: introduce of_dma_get_range() helper
ARM: dma: Use dma_pfn_offset for dma address translation

Santosh Shilimkar (5):
device: introduce per device dma_pfn_offset
of: introduce of_dma_is_coherent() helper
of: configure the platform device dma parameters
ARM: dma: implement set_arch_dma_coherent_ops()
ARM: dma: use phys_addr_t in __dma_page_[cpu_to_dev/dev_to_cpu]

arch/arm/include/asm/dma-mapping.h | 28 ++++++++++--
arch/arm/mm/dma-mapping.c | 4 +-
drivers/of/address.c | 87 ++++++++++++++++++++++++++++++++++++
drivers/of/platform.c | 71 +++++++++++++++++++++++++++--
include/linux/device.h | 2 +
include/linux/dma-mapping.h | 7 +++
include/linux/of_address.h | 8 ++++
include/linux/of_platform.h | 6 +++
8 files changed, 204 insertions(+), 9 deletions(-)

Regards,
Santosh

[1] http://www.spinics.net/lists/arm-kernel/msg311678.html
[2] https://lkml.org/lkml/2014/3/6/186
[3] https://lkml.org/lkml/2014/4/19/80
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