What:		/sys/class/rapidio_port
Description:
		On-chip RapidIO controllers and PCIe-to-RapidIO bridges
		(referenced as "Master Port" or "mport") are presented in sysfs
		as the special class of devices: "rapidio_port".
		The /sys/class/rapidio_port subdirectory contains individual
		subdirectories named as "rapidioN" where N = mport ID registered
		with RapidIO subsystem.

		NOTE: An mport ID is not a RapidIO destination ID assigned to a
		given local mport device.

What:		/sys/class/rapidio_port/rapidio<N>/sys_size
Date:		Apr, 2014
KernelVersion:	v3.15
Contact:	Matt Porter <mporter@kernel.crashing.org>,
		Alexandre Bounine <alexandre.bounine@idt.com>
Description:
		(RO) reports RapidIO common transport system size:

		0 = small (8-bit destination ID, max. 256 devices),

		1 = large (16-bit destination ID, max. 65536 devices).

What:		/sys/class/rapidio_port/rapidio<N>/port_destid
Date:		Apr, 2014
KernelVersion:	v3.15
Contact:	Matt Porter <mporter@kernel.crashing.org>,
		Alexandre Bounine <alexandre.bounine@idt.com>
Description:

(RO) reports RapidIO destination ID assigned to the given
RapidIO mport device. If value 0xFFFFFFFF is returned this means
that no valid destination ID have been assigned to the mport
(yet). Normally, before enumeration/discovery have been executed
only fabric enumerating mports have a valid destination ID
assigned to them using "hdid=..." rapidio module parameter.

After enumeration or discovery was performed for a given mport device,
the corresponding subdirectory will also contain subdirectories for each
child RapidIO device connected to the mport.

The example below shows mport device subdirectory with several child RapidIO
devices attached to it::

    [rio@rapidio ~]$ ls /sys/class/rapidio_port/rapidio0/ -l
    total 0
    drwxr-xr-x 3 root root    0 Feb 11 15:10 00:e:0001
    drwxr-xr-x 3 root root    0 Feb 11 15:10 00:e:0004
    drwxr-xr-x 3 root root    0 Feb 11 15:10 00:e:0007
    drwxr-xr-x 3 root root    0 Feb 11 15:10 00:s:0002
    drwxr-xr-x 3 root root    0 Feb 11 15:10 00:s:0003
    drwxr-xr-x 3 root root    0 Feb 11 15:10 00:s:0005
    lrwxrwxrwx 1 root root    0 Feb 11 15:11 device -> ../../../0000:01:00.0
    -r--r--r-- 1 root root 4096 Feb 11 15:11 port_destid
    drwxr-xr-x 2 root root    0 Feb 11 15:11 power
    lrwxrwxrwx 1 root root    0 Feb 11 15:04 subsystem -> ../../../../../../class/rapidio_port
    -r--r--r-- 1 root root 4096 Feb 11 15:11 sys_size
    -rw-r--r-- 1 root root 4096 Feb 11 15:04 uevent