On Wed, Apr 24, 2019 at 12:57:14PM +0800, Ley Foon Tan wrote:

Altera PCIe Rootport IP is a soft IP and is only available after
FPGA image is programmed.

Make driver modulable to support use case FPGA image is programmed
after kernel is booted. User proram FPGA image in kernel then only load
PCIe driver module.

I'm not objecting to these patches, but help me understand how this
works.  The "usual" scenario is that if a driver is loaded before a
matching device is available, i.e., either the driver is built
statically or it is loaded before a device is hot-added, the event of
the device being available causes the driver's probe method to be
called.

This seems to be a more manual process of programming the FPGA which
results in a new "altera-pcie" platform device.  And then apparently
you need to load the appropriate module by hand?  Is there no
"hot-add" type of event for this platform device that automatically
looks for the driver?

Bjorn