RE: add support for the global coherent pool to the dma core

[Brian Cain]

> -----Original Message-----
> From: Christoph Hellwig <hch@xxxxxx>
> Sent: Monday, July 12, 2021 1:17 AM
> To: iommu@xxxxxxxxxxxxxxxxxxxxxxxxxx; Russell King
<linux@xxxxxxxxxxxxxxx>;
> Brian Cain <bcain@xxxxxxxxxxxxxx>
> Cc: Dillon Min <dillon.minfei@xxxxxxxxx>; Vladimir Murzin
> <vladimir.murzin@xxxxxxx>; linux-arm-kernel@xxxxxxxxxxxxxxxxxxx; linux-
> hexagon@xxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx
> Subject: add support for the global coherent pool to the dma core
> 
> Hi all,
> 
> this series adds support for using the global coherent (aka uncached)
> pool to the generic dma-direct code and then switches arm-nommu and
> hexagon over to it, together with a bunch of cleanups.

Christoph,

Thanks for sending this -- I will take a look and give some feedback soon.

> Diffstat:
>  arch/arm/Kconfig                |    5 -
>  arch/arm/mm/dma-mapping-nommu.c |  173
+--------------------------------------
> -
>  arch/hexagon/Kconfig            |    1
>  arch/hexagon/kernel/dma.c       |   57 ++-----------
>  include/linux/dma-map-ops.h     |   18 ++--
>  kernel/dma/Kconfig              |    4
>  kernel/dma/coherent.c           |  159
+++++++++++++++++-------------------
>  kernel/dma/direct.c             |   15 +++
>  8 files changed, 124 insertions(+), 308 deletions(-)