Re: [PATCHv9 00/12] PCI: Recode Mobiveil driver and add PCIe Gen4 driver for NXP Layerscape SoCs

[Li Yang]

On Mon, Feb 10, 2020 at 12:41 PM Li Yang <leoyang.li@xxxxxxx> wrote:
>
> On Mon, Feb 10, 2020 at 9:32 AM Olof Johansson <olof@xxxxxxxxx> wrote:
> >
> > On Mon, Feb 10, 2020 at 4:23 PM Russell King - ARM Linux admin
> > <linux@xxxxxxxxxxxxxxx> 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@xxxxxxx> 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