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SubjectRe: [PATCH] PCI: Marvell: Update PCIe fixup
On Tue, 2 Nov 2021, Pali Rohár wrote:

> > > >From all what I saw, I'm sure that this device with this specific
> > > characteristics is really (non-compliant) Marvell PCIe controller.
> >
> > just nitpicking, it's a Galileo PCI bridge and not PCIe.
>
> Marvell acquired Galileo Technology in the past, so it is possible that
> this bad design is originated in Galileo. And maybe same for PCIe from
> PCI. At least PCI vendor id for all (new) PCIe controllers is this one.

Umm, PCIe is so different hardware-wise from PCI I doubt there's any
chance for errata to be carried across. Plus the MIPS SysAD bus is so
different from other CPU buses. And we're talking 20+ years old Galileo
devices here.

None of the Galileo system controllers I came across had the class code
set incorrectly.

> > > But I do not have this hardware to verify it.
> >
> > I still have a few Cobalt systems here.
>
> Perfect! It would help if you could provide 'lspci -nn -vv' output from
> that system. In case you have very old version of lspci on that system
> you could try to run it with '-xxxx' (or '-xxx') which prints hexdump
> and I can parse it with local lspci.

For the record here's one from a core card used with a Malta (as with
arch/mips/pci/fixup-malta.c); it has a newer 64120A chip (marked as an
engineering sample BTW):

00:00.0 Host bridge: Marvell Technology Group Ltd. GT-64120/64120A/64121A System Controller (rev 11)
00: ab 11 20 46 47 01 80 22 11 00 00 06 00 20 00 00
10: 00 00 00 00 00 00 00 08 00 00 00 00 00 00 00 00
20: 00 00 e0 1b 00 00 00 00 00 00 00 00 00 00 00 00
30: 00 00 00 00 00 00 00 00 00 00 00 00 ff 01 00 00
40: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
50: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
60: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
70: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
90: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

The lack of a quirk with a platform does not mean it cannot have a certain
PCI/e device.

As I recall various Atlas/Malta core cards had any of the three device
variants covered by this vendor:device ID and later batches were actually
indeed marked Marvell rather than Galileo.

Maciej

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