Trying to reset a PCIe device and scratching my head...

[Jimmie Mayfield <mayfield@sackheads.org>]

Hello.  I'm in the process of writing a device driver for a PCIe
device where the bulk of the logic, including the PCIe interface, is 
implemented on a couple of large FPGAs.  Current target platform is x86 
Linux.

Having the PCIe interface implemented inside FPGA 'A' makes upgrading
that particular FPGA rather troublesome.  In a perfect world, one would
be able to upgrade the FPGA without having to reboot the machine.  The
hardware guys have designed the card to reload that FPGA image upon a
slot reset...either fundamental or hot.  (If I could guarantee the
card would always be plugged into a hotplug-capable slot, I suppose I could
forge a hotplug event and toggle power to the slot.  But I can't impose
that requirement on customers.)

So I'd like to be able to send either a fundamental or hot reset to the
device but so far I've had no success.  Is there a recommended way of doing 
this on x86 Linux?  

Jimmie