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

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Message-ID: <03d501d783c4$1d3f10e0$57bd32a0$@codeaurora.org>
Date:   Wed, 28 Jul 2021 10:20:34 -0500
From:   "Brian Cain" <bcain@...eaurora.org>
To:     "'Christoph Hellwig'" <hch@....de>,
        <iommu@...ts.linux-foundation.org>,
        "'Russell King'" <linux@...linux.org.uk>
Cc:     "'Dillon Min'" <dillon.minfei@...il.com>,
        "'Vladimir Murzin'" <vladimir.murzin@....com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-hexagon@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        "'Manning, Sid'" <sidneym@...cinc.com>
Subject: RE: add support for the global coherent pool to the dma core



> -----Original Message-----
> From: Christoph Hellwig <hch@....de>
> Sent: Monday, July 12, 2021 1:17 AM
> To: iommu@...ts.linux-foundation.org; Russell King
<linux@...linux.org.uk>;
> Brian Cain <bcain@...eaurora.org>
> Cc: Dillon Min <dillon.minfei@...il.com>; Vladimir Murzin
> <vladimir.murzin@....com>; linux-arm-kernel@...ts.infradead.org; linux-
> hexagon@...r.kernel.org; linux-kernel@...r.kernel.org
> 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(-)