On 10/04/2016 12:10 PM, Laine Stump wrote:
On 10/04/2016 11:40 AM, Laszlo Ersek wrote:
Small correction to your wording though: you don't want to attach the
DMI-PCI bridge to the PXB device, but to the extra root bus provided by
the PXB.
This made me realize something - the root bus on a pxb-pcie controller
has a single slot and that slot can accept either a pcie-root-port
(ioh3420) or a dmi-to-pci-bridge. If you want to have both express and
legacy PCI devices on the same NUMA node, then you would either need to
create one pxb-pcie for the pcie-root-port and another for the
dmi-to-pci-bridge, or you would need to put the pcie-root-port and
dmi-to-pci-bridge onto different functions of the single slot. Should
the latter work properly?
We were discussing pxb-pcie today while Dan was trying to get a
particular configuration working, and there was some disagreement about
two points that I stated above as fact (but which may just be
misunderstanding again):
1) Does pxb-pcie only provide a single slot (0)? Or does it provide 32
slots (0-31) just like the pcie root complex?
2) can you really only plug a pcie-root-port (ioh3420) into a pxb-pcie?
Or will it accept anything that pcie.0 accepts?
