linux-kernel - Re: arm-smmu 5000000.iommu: Cannot accommodate DMA offset for IOMMU page tables

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Message-ID: <20201014145846.613977d5@xps13>
Date:   Wed, 14 Oct 2020 14:58:46 +0200
From:   Miquel Raynal <miquel.raynal@...tlin.com>
To:     Fabio Estevam <festevam@...il.com>
Cc:     Florian Fainelli <f.fainelli@...il.com>,
        Jim Quinlan <james.quinlan@...adcom.com>,
        Stephen Rothwell <sfr@...b.auug.org.au>,
        abhimanyu.saini@....com, Ioana Ciornei <ioana.ciornei@....com>,
        Naresh Kamboju <naresh.kamboju@...aro.org>,
        Joerg Roedel <joro@...tes.org>,
        Robin Murphy <robin.murphy@....com>,
        Poonam Aggrwal <poonam.aggrwal@....com>,
        Rob Herring <robh@...nel.org>, Joerg Roedel <jroedel@...e.de>,
        Arnd Bergmann <arnd@...db.de>,
        Richard Weinberger <richard@....at>,
        open list <linux-kernel@...r.kernel.org>,
        lkft-triage@...ts.linaro.org,
        Linux-Next Mailing List <linux-next@...r.kernel.org>,
        linux-mtd@...ts.infradead.org, Suram Suram <suram@....com>,
        masonccyang@...c.com.tw, Will Deacon <will@...nel.org>,
        "Z.Q. Hou" <Zhiqiang.Hou@....com>, Christoph Hellwig <hch@....de>
Subject: Re: arm-smmu 5000000.iommu: Cannot accommodate DMA offset for IOMMU
 page tables

Hello,

Fabio Estevam <festevam@...il.com> wrote on Wed, 14 Oct 2020 09:28:49
-0300:

> Hi Florian,
> 
> On Sun, Oct 11, 2020 at 6:59 PM Florian Fainelli <f.fainelli@...il.com> wrote:
> 
> > however the NAND warning still remains. Someone else familiar with these
> > NXP development boards should fix the DTS so as to provide the require
> > ECC strength property.  
> 
> The ECC NAND warning looks like a regression.
> 
> I had originally reported it for an imx27 board and now I also pointed
> out that it also affects Layerscape:
> https://lore.kernel.org/linux-mtd/20201013193652.0c535c7c@xps13/T/#m09fad7eacdf86aee0834bbd8863d6d5ee2e69f8c

I think this thread initially reported two distinct defects, one has
been solved, the second one is in my hands but I couldn't find the root
cause yet. I tried to reproduce, without luck, with another NAND
controller. If someone has an imx based board and a NAND controller on
it, I would appreciate some help.

Thanks,
Miquèl