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

[Clemens Ladisch <clemens@ladisch.de>]

Jimmie Mayfield wrote:
> 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.
> 
> 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.

The PCIe AER driver (drivers/pci/pcie/aer/) sends a hot reset when
it has received a fatal error.  As far as I can tell, it just sets the
PCI_BRIDGE_CTL_BUS_RESET bit of the upstream bridge; everything else
is just infrastructure to handle error reporting and to notify the
device driver about the reset.


Regards,
Clemens