Re: 4.3-rc3 BAR allocation problems on multiple machines

Meelis Roos
2015-10-14T07:32:33Z

> > 0001:00:07.0 ISA bridge: ULi Electronics Inc. M1533/M1535/M1543 PCI to ISA Bridge [Aladdin IV/V/V+]
> > Control: I/O+ Mem+ BusMaster+ SpecCycle+ MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
> > Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
> > Latency: 0
> > Region 0: [virtual] I/O ports at 0000 [size=64K]
> > Region 1: Memory at <unassigned> (32-bit, non-prefetchable) [size=1M]
> > Region 2: Memory at <unassigned> (32-bit, non-prefetchable) [size=1M]
> > Region 3: [virtual] Memory at fffff80100000000 (32-bit, non-prefetchable)
> > Region 4: [virtual] Memory at fffff80100000000 (32-bit, non-prefetchable)
> > Region 5: [virtual] Memory at fffff80100000000 (32-bit, non-prefetchable)
> > [virtual] Expansion ROM at fffff80100000000 [disabled]
> > Capabilities: [a0] Power Management version 1
> > Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
> > Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
> > 00: b9 10 33 15 0f 00 10 02 00 00 01 06 00 00 00 00
> > 10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > 20: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > 30: 00 00 00 00 a0 00 00 00 00 00 00 00 00 00 00 00
> > 40: 03 13 4b 80 83 09 00 47 00 00 06 00 00 00 eb 31
> > 50: 00 00 00 20 90 02 20 03 66 03 00 00 00 00 00 08
> > 60: 40 00 00 00 00 00 00 00 00 00 00 00 80 20 00 00
> > 70: 00 00 0a 00 47 00 00 db 04 02 00 04 00 80 01 90
> > 80: a5 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: 01 00 01 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
>
> Please check attached patch.

Thank you, it seems to work. First, the following lines are gone:
PCI: Claiming 0001:00:07.0: Resource 0: 000007fe01000000..000007fe0100ffff [101]
PCI: Claiming 0001:00:07.0: Resource 1: 000007ff00000000..000007ff000fffff [200]
PCI: Claiming 0001:00:07.0: Resource 2: 000007ff00000000..000007ff000fffff [200]

And then all following PCI: Claiming... lines succeed, with no address
conflicts.

Now, how can I be sure that removing the ULi ISA bridge allocations does
not break anything? It seems I did not have I2C enabled in kernel conf -
I emabled it now, recompiled, got this but it seems to be for another
PCI device so not related?
ali15x3_smbus 0001:00:06.0: ALI15X3_smb region uninitialized - upgrade BIOS or use force_addr=0xaddr
ali15x3_smbus 0001:00:06.0: ALI15X3 not detected, module not inserted.

Additionally, another driver (i2c-ali1535) claimed 0001:00:06.0 and was
happy but did not find anything (but I do not know what it sahould find
so I can see no problem at the moment).

I also applied the patch on Sun Blade 100 where i2c was working for me.
It was still working with this ali quirk patch applied, and no BAR
errors.

What about other arches - does this patch affect other arches where the
firmware has configured some addresses for this ULi bridge?

--
Meelis Roos (mroos@linux.ee)