On Thu, Dec 23, 2021 at 07:12:02PM +0100, Michael Walle wrote:
> Am 2021-12-23 17:37, schrieb Bjorn Helgaas:
>
> > I intended to change the quirk from FINAL to EARLY, but obviously
> > forgot. Here's the updated version:
> >
> > commit bb5639b73a2d ("PCI: Work around Intel I210 ROM BAR overlap
> > defect")
> > Author: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
> > Date: Tue Dec 21 10:45:07 2021 -0600
> >
> > PCI: Work around Intel I210 ROM BAR overlap defect
> >
> > Per PCIe r5, sec 7.5.1.2.4, a device must not claim accesses to its
> > Expansion ROM unless both the Memory Space Enable and the Expansion
> > ROM
> > Enable bit are set. But apparently some Intel I210 NICs don't work
> > correctly if the ROM BAR overlaps another BAR, even if the Expansion
> > ROM is
> > disabled.
> >
> > Michael reported that on a Kontron SMARC-sAL28 ARM64 system with
> > U-Boot
> > v2021.01-rc3, the ROM BAR overlaps BAR 3, and networking doesn't
> > work at
> > all:
> >
> > BAR 0: 0x40000000 (32-bit, non-prefetchable) [size=1M]
> > BAR 3: 0x40200000 (32-bit, non-prefetchable) [size=16K]
> > ROM: 0x40200000 (disabled) [size=1M]
> >
> > NETDEV WATCHDOG: enP2p1s0 (igb): transmit queue 0 timed out
> > Hardware name: Kontron SMARC-sAL28 (Single PHY) on SMARC Eval
> > 2.0 carrier (DT)
> > igb 0002:01:00.0 enP2p1s0: Reset adapter
> >
> > Previously, pci_std_update_resource() wrote the assigned ROM address
> > to the
> > BAR only when the ROM was enabled. This meant that the I210 ROM BAR
> > could
> > be left with an address assigned by firmware, which might overlap
> > with
> > other BARs.
> >
> > Quirk these I210 devices so pci_std_update_resource() always writes
> > the
> > assigned address to the ROM BAR, whether or not the ROM is enabled.
> >
> > Link:
> > https://lore.kernel.org/r/20201230185317.30915-1-michael@xxxxxxxx
> > Link: https://bugzilla.kernel.org/show_bug.cgi?id=211105
> > Reported-by: Michael Walle <michael@xxxxxxxx>
> > Signed-off-by: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
>
> Tested-by: Michael Walle <michael@xxxxxxxx>
Applied to pci/resource for v5.17, thanks!
