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
