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/sys_size Date: Apr, 2014 KernelVersion: v3.15 Contact: Matt Porter , Alexandre Bounine 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/port_destid Date: Apr, 2014 KernelVersion: v3.15 Contact: Matt Porter , Alexandre Bounine 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