Re: [PATCH] PCI: Add Max Payload Size quirk for ASMedia ASM1062 SATA controller

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I directed the Armbian guys (Werner) to your patch and they included it into their master branch. So I got to compile an Armbian kernel in order to test the patch in my setup with the EspressoBin Board and the AS-Media SATA-controller chips.

I've tested it and it works flawlessly :-)

Thanks!

Am 21.03.2021 16:09 schrieb Rötti:
I organized a T60 Thinkpad, pulled out the Wificard (MiniPCIE) and
plugged in the Marvell SATA-Controller card. Good news is that you're
right, the DevCap MaxPayload is 128 bytes, so I couldn't reproduce
that error on that thinkpad. I tried two different Marvell controller
cards. Wierd thing is, that both cards did not sho up in the lspci -nn
-vv command. So I'm not sure if these got recognized.

With these patches supplied (@thank you very much Marek & Björn) is
there a build server I can download a nightly version of armbian I can
test for you?
Is there any way I can support?

Thank you very much in advance!

Am 19.03.2021 20:02 schrieb Pali Rohár:
On Wednesday 17 March 2021 18:03:55 Bjorn Helgaas wrote:
On Wed, Mar 17, 2021 at 11:55:44PM +0100, Pali Rohár wrote:
> On Wednesday 17 March 2021 17:45:49 Bjorn Helgaas wrote:
> > This quirk suggests that there's a hardware defect in the ASMedia
> > ASM1062.  But if that's really the case, we should see reports on lots
> > of platforms, and I'm only aware of these two.
>
> Do you have platform which support MPS of 512 bytes? Because I have not
> seen any x86 / Intel PCIe controller with such support on ordinary
> laptop and desktop.
>
> These two (A3720 and CN9130) are the only which has support for it.
>
> Has somebody else PCIe controller which Root Bridge supports MPS of 512
> bytes?
>
> Maybe they are in servers, but then such "cheap" SATA controllers are
> not used in servers. So this is probably reason why nobody else reported
> such issue.

I have no idea.  My laptop only supports 512 (except for an ASMedia
USB controller).  If the device advertises it, I would expect the
vendor to test it. Obviously it still could be a device defect. They
should publish an erratum if that's the case so people know to avoid
it.  So I would try to get ASMedia to say "no, that's tested and
should work" or "oh, sorry, here's an erratum and we'll fix it in the
next round."

I doubt that ASMedia publish something...

But has somebody contact to ASMedia? I can try it.

Basically these ASMedia SATA controller chips are present on more
"noname" mPCIe-form cards and I guess ASMedia is not going to support
them.

Note that we have also tested Marvell PCIe-based SATA controllers which
support MPS of 512 bytes too and there were no problem with them on
A3720 nor CN9130.




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