linux-kernel - Re: [PATCH v3 05/11] iommu/mediatek: mt8195: Add iova_region_larb

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Date:   Tue, 14 Feb 2023 09:49:15 +0000
From:   Yong Wu (吴勇) <Yong.Wu@...iatek.com>
To:     "joro@...tes.org" <joro@...tes.org>,
        "matthias.bgg@...il.com" <matthias.bgg@...il.com>,
        "mchehab@...nel.org" <mchehab@...nel.org>,
        "angelogioacchino.delregno@...labora.com" 
        <angelogioacchino.delregno@...labora.com>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>
CC:     "linux-mediatek@...ts.infradead.org" 
        <linux-mediatek@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Youlin Pei (裴友林) 
        <youlin.pei@...iatek.com>,
        "linux-media@...r.kernel.org" <linux-media@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
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        Anan Sun (孙安安) <Anan.Sun@...iatek.com>,
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        <krzysztof.kozlowski+dt@...aro.org>,
        "iommu@...ts.linux.dev" <iommu@...ts.linux.dev>,
        Mingyuan Ma (马鸣远) 
        <Mingyuan.Ma@...iatek.com>, "will@...nel.org" <will@...nel.org>,
        "nfraprado@...labora.com" <nfraprado@...labora.com>
Subject: Re: [PATCH v3 05/11] iommu/mediatek: mt8195: Add iova_region_larb_msk

On Tue, 2023-02-14 at 10:36 +0100, AngeloGioacchino Del Regno wrote:
> Il 14/02/23 04:11, Yong Wu ha scritto:
> > Add iova_region_larb_msk for mt8195. We separate the 16GB iova
> > regions
> > by each device's larbid/portid.
> > Refer to include/dt-bindings/memory/mt8195-memory-port.h
> > 
> > Define a new macro MT8192_MULTI_REGION_MAX_NR to indicate
> > the index of mt8xxx_larb_region_msk and
> > "struct mtk_iommu_iova_region mt8192_multi_dom"
> > are the same.
> > 
> > Signed-off-by: Yong Wu <yong.wu@...iatek.com>
> 
> Sorry but... you *are* introducing a iova_region_larb_msk for MT8192
> later,
> while you're introducing definitions containing the `MT8192` name in
> a commit
> that introduces the same but for MT8195.
> 
> I strongly suggest to, at this point, introduce MT8192 region mask
> here, along
> with the MT8192 definitions, and MT8195 after that :-)

Make sense.
Thanks very much. Will fix it.

> 
> 
> Regards,
> Angelo
> 
>