Hi, I'm hoping somebody can tell me the correct way to change the memory resources allocated to particular PCI buses/devices at startup?
I'm developing a card (MPC8641D, 2.6.25 kernel) that includes a PCI/X-VMEBus bridge, and the driver requires that it have a chunk of [prefetchable] PCI memory space available to it. There is nothing on the chip that says so: it has a single BAR that covers its configuration registers, but nothing else. So: I need a way to declare an additional memory requirement for this particular device that will wend its way back through the chain of PCIe and PCIX buses to the root. So far I've been using a platform-specific "pcibios_fixup_resources" function that simply writes-in my new requirement, in conjunction with "ppc_pci_flags = PPC_PCI_REASSIGN_ALL_RSRC", as a new resource entry in the device's pci_device structure. And this has been working well, so far. But I've discovered that fitting an XMC/PMC card to my board mucks things up - the resource allocations fail. The XMC/PMC card appears on the same PCI/X bus as the VME bridge. This leads me to think I've not been using the correct method all along, but happened to hit lucky until now. What is the right way to do this? Is pcibios_fixup_resources even meant to do something like this? Any help gratefully welcomed. Cheers, - Trevor Anderson <[EMAIL PROTECTED]> -- View this message in context: http://www.nabble.com/Correct-way-to-adjust-PCI-resource-allocations--tp17810852p17810852.html Sent from the linuxppc-embedded mailing list archive at Nabble.com. _______________________________________________ Linuxppc-embedded mailing list Linuxppc-embedded@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-embedded
