Hello,
I am working on a SR-IOV capable network device. It can be configured in
two ways. One way is that each device node can have four pci functions
in pci function mode. Another way is that each device node can have one
PF and three VFs in the SR-IOV mode. There are total four of these
devices in my setup (maximal configuration of the device). So there are
total 16 pci functions in the pci function mode, and total 4 PFs and 12
VFs in the SR-IOV mode. I have no problem in the pci function mode, but
got "PCI: mem resource #9:300000@f9d00000 for 0000:16:00.0 was not
allocated" in the SR-IOV mode. The requested resource are all the same
for each pci function or PF/VF. The resource of each pci function/PF/VF
= (msix 0x3fff + pio 0xfffff), so total 16 of them = (msix 0x3fff + pio
0xfffff) * 16 = 23.5 m. It is not a lot. Does it exceed max resource
allocation? Is there a tunable in the Linux kernel that can give more
resource to one kind of device? Any idea how to deal with it?
Thanks in advance,
Joyce
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