linux-kernel - Re: [PATCH v4 12/20] iommu/tegra: gart: Integrate with Memory Controller driver

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Message-ID: <20180924102322.GI21032@ulmo>
Date:   Mon, 24 Sep 2018 12:23:22 +0200
From:   Thierry Reding <thierry.reding@...il.com>
To:     Dmitry Osipenko <digetx@...il.com>
Cc:     Jonathan Hunter <jonathanh@...dia.com>,
        Joerg Roedel <joro@...tes.org>,
        Rob Herring <robh+dt@...nel.org>,
        Robin Murphy <robin.murphy@....com>,
        iommu@...ts.linux-foundation.org, devicetree@...r.kernel.org,
        linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 12/20] iommu/tegra: gart: Integrate with Memory
 Controller driver

On Mon, Sep 24, 2018 at 03:41:45AM +0300, Dmitry Osipenko wrote:
> The device-tree binding has been changed. There is no separate GART device
> anymore, it is squashed into the Memory Controller. Integrate GART module
> with the MC in a way it is done for the SMMU of Tegra30+.
> 
> Signed-off-by: Dmitry Osipenko <digetx@...il.com>
> ---
>  drivers/iommu/Kconfig      |  1 +
>  drivers/iommu/tegra-gart.c | 98 ++++++++++----------------------------
>  drivers/memory/tegra/mc.c  | 41 ++++++++++++++++
>  include/soc/tegra/mc.h     | 27 +++++++++++
>  4 files changed, 93 insertions(+), 74 deletions(-)

I think this could technically have been two patches, but since they'd
have a compile-time dependency either way they need to be applied in the
correct order, so some coordination between IOMMU and Tegra trees is
going to have to happen anyway and might as well just stick this into a
single patch.

Thierry

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