On Fri, Mar 03, 2006 at 11:42:03AM -0600, Kumar Gala wrote:
> I was wondering what the proper way to assign and setup a single PCI
> device that comes into existence after the system has booted. I have
> an FPGA that we load from user space at which time it shows up on the
> PCI bus.
Idealy your BIOS would set up this information :)
> It has a single BAR and I need to assign it at a fixed address in PCI
> MMIO space.
>
> All of the exported interfaces I see have to do with having the
> kernel assign the BAR automatically for me.
>
> the following looks like what I want to do:
>
> bus = pci_find_bus(0, 3);
> dev = pci_scan_single_device(bus, devfn);
> pci_bus_alloc_resource(...);
> pci_update_resource(dev, dev->resource[0], 0);
> pci_bus_add_devices(bus);
>
> However, pci_update_resource() is not an exported symbol, so I could
> replace that code with the need updates to the actual BAR.
>
> Is this the "right" way to go about this or is there a better
> mechanism to do this.
Take a look at how the compat pci hotplug driver does this, you probably
just need to do the same as it.
thanks,
greg k-h
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