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Message-ID: <CADRPPNQ6wYOXzH_Hh9x4YDN_Mg1iaiYqMM8p_m9zJXfr_TQayw@mail.gmail.com>
Date:   Mon, 10 Feb 2020 13:48:14 -0600
From:   Li Yang <leoyang.li@....com>
To:     Olof Johansson <olof@...om.net>,
        Laurentiu Tudor <laurentiu.tudor@....com>
Cc:     Russell King - ARM Linux admin <linux@...linux.org.uk>,
        "Z.q. Hou" <zhiqiang.hou@....com>,
        "bhelgaas@...gle.com" <bhelgaas@...gle.com>,
        "mark.rutland@....com" <mark.rutland@....com>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        "m.karthikeyan@...iveil.co.in" <m.karthikeyan@...iveil.co.in>,
        "arnd@...db.de" <arnd@...db.de>,
        "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
        "l.subrahmanya@...iveil.co.in" <l.subrahmanya@...iveil.co.in>,
        "will.deacon@....com" <will.deacon@....com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "M.h. Lian" <minghuan.lian@....com>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        Mingkai Hu <mingkai.hu@....com>,
        "catalin.marinas@....com" <catalin.marinas@....com>,
        Xiaowei Bao <xiaowei.bao@....com>,
        "andrew.murray@....com" <andrew.murray@....com>,
        "shawnguo@...nel.org" <shawnguo@...nel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCHv9 00/12] PCI: Recode Mobiveil driver and add PCIe Gen4
 driver for NXP Layerscape SoCs

On Mon, Feb 10, 2020 at 12:41 PM Li Yang <leoyang.li@....com> wrote:
>
> On Mon, Feb 10, 2020 at 9:32 AM Olof Johansson <olof@...om.net> wrote:
> >
> > On Mon, Feb 10, 2020 at 4:23 PM Russell King - ARM Linux admin
> > <linux@...linux.org.uk> wrote:
> > >
> > > On Mon, Feb 10, 2020 at 04:12:30PM +0100, Olof Johansson wrote:
> > > > On Thu, Feb 6, 2020 at 11:57 AM Z.q. Hou <zhiqiang.hou@....com> wrote:
> > > > >
> > > > > Hi Olof,
> > > > >
> > > > > Thanks a lot for your comments!
> > > > > And sorry for my delay respond!
> > > >
> > > > Actually, they apply with only minor conflicts on top of current -next.
> > > >
> > > > Bjorn, any chance we can get you to pick these up pretty soon? They
> > > > enable full use of a promising ARM developer system, the SolidRun
> > > > HoneyComb, and would be quite valuable for me and others to be able to
> > > > use with mainline or -next without any additional patches applied --
> > > > which this patchset achieves.
> > > >
> > > > I know there are pending revisions based on feedback. I'll leave it up
> > > > to you and others to determine if that can be done with incremental
> > > > patches on top, or if it should be fixed before the initial patchset
> > > > is applied. But all in all, it's holding up adaption by me and surely
> > > > others of a very interesting platform -- I'm looking to replace my
> > > > aging MacchiatoBin with one of these and would need PCIe/NVMe to work
> > > > before I do.
> > >
> > > If you're going to be using NVMe, make sure you use a power-fail safe
> > > version; I've already had one instance where ext4 failed to mount
> > > because of a corrupted journal using an XPG SX8200 after the Honeycomb
> > > Serror'd, and then I powered it down after a few hours before later
> > > booting it back up.
> > >
> > > EXT4-fs (nvme0n1p2): INFO: recovery required on readonly filesystem
> > > EXT4-fs (nvme0n1p2): write access will be enabled during recovery
> > > JBD2: journal transaction 80849 on nvme0n1p2-8 is corrupt.
> > > EXT4-fs (nvme0n1p2): error loading journal
> >
> > Hmm, using btrfs on mine, not sure if the exposure is similar or not.
> >
> > Do you know if the SErr was due to a known issue and/or if it's
> > something that's fixed in production silicon?
> >
> > (I still can't enable SMMU since across a warm reboot it fails
> > *completely*, with nothing coming up and working. NXP folks, you
> > listening? :)
>
> This is a known issue about DPAA2 MC bus not working well with SMMU
> based IO mapping.  Adding Laurentiu to the chain who has been looking
> into this issue.

Forgot to mention that you can workaround the issue by setting
CONFIG_ARM_SMMU_DISABLE_BYPASS_BY_DEFAULT=n or adding
"arm-smmu.disable_bypass=0" to boot parameters.

Regards,
Leo

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