Re: Calling PCI Autoconfig again

On Mar 7, 2006, at 1:25 PM, Wyse, Chris wrote:

Hi Kumar,

Thanks for the response.  Also, I apologize to the group - I didn't  
mean
to CC: the list with the last note.  However, I am glad that it got a
response from you.

Regarding the FPGA address assignment - it doesn't matter at all to  
me,
I just need to be able to access it on the PCI once the load is
complete.

As for the FPGA loader, the intent is that it will make the call to
rescan the PCI after the load is complete.  In fact, I intend to  
use it
as a way of determining if the load completed successfully, since we
don't have access to the DONE signal from the FPGA (we ran out of GPIO
pins).

If you missed this link from a previous post, please check it out.  It
implements a rescan of the PCI.

http://marc.theaimsgroup.com/?l=linux-hotplug- 
devel&m=101318310111131&w=
2

I saw this link and felt that the code was doing alot of work that  
was already handled by the PCI subsystem for you.  For example, there  
isn't a need for you to kmalloc your own dev and go through all the  
effort.

For your case it should be as simple as the following:

bus = pci_find_bus(0, bus_of_dev);
dev = pci_scan_single_device(bus, devfn);
pci_bus_alloc_resource(...);
pci_bus_add_devices(bus);

You could also look at using the pci_scan_slot() / pci_find_slot()  
instead of pci_scan_single_device().

- kumar