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

Santosh Shilimkar
2014-05-01T13:19:58Z

Rob, Russell,

On Thursday 24 April 2014 11:30 AM, Santosh Shilimkar wrote:
> 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(-)
>
How do we go about merging this series ? There is a dependency
between the patches and hence the question.

>
> [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
>