PCI: layerscape: Allow to share stream_ids per host controller
...
Normally every device gets its own stream_id. The stream_ids are
communicated to the kernel in the device tree and are also configured
in the controllers LUT table.
This only works when all PCI devices are known in the bootloader
which may not always be the case. For example, when a PCI device
is a FPGA and its firmware is only loaded under Linux, then the
device is not known to barebox and thus not assigned a stream_id.
With global.layerscape_pcie.share_stream_ids set to true all devices
on a host controller get the same stream_id assigned. This setup is
completely device agnostic and thus also works when not all devices
are known to barebox.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Sascha Hauer
committed
on 20 Jan 2020
