xref: /linux/Documentation/ABI/testing/sysfs-class-rapidio (revision 03ab8e6297acd1bc0eedaa050e2a1635c576fd11)
1What:		/sys/class/rapidio_port
2Description:
3		On-chip RapidIO controllers and PCIe-to-RapidIO bridges
4		(referenced as "Master Port" or "mport") are presented in sysfs
5		as the special class of devices: "rapidio_port".
6		The /sys/class/rapidio_port subdirectory contains individual
7		subdirectories named as "rapidioN" where N = mport ID registered
8		with RapidIO subsystem.
9
10		NOTE: An mport ID is not a RapidIO destination ID assigned to a
11		given local mport device.
12
13What:		/sys/class/rapidio_port/rapidio<N>/sys_size
14Date:		Apr, 2014
15KernelVersion:	v3.15
16Contact:	Matt Porter <mporter@kernel.crashing.org>,
17		Alexandre Bounine <alexandre.bounine@idt.com>
18Description:
19		(RO) reports RapidIO common transport system size:
20
21		0 = small (8-bit destination ID, max. 256 devices),
22
23		1 = large (16-bit destination ID, max. 65536 devices).
24
25What:		/sys/class/rapidio_port/rapidio<N>/port_destid
26Date:		Apr, 2014
27KernelVersion:	v3.15
28Contact:	Matt Porter <mporter@kernel.crashing.org>,
29		Alexandre Bounine <alexandre.bounine@idt.com>
30Description:
31
32(RO) reports RapidIO destination ID assigned to the given
33RapidIO mport device. If value 0xFFFFFFFF is returned this means
34that no valid destination ID have been assigned to the mport
35(yet). Normally, before enumeration/discovery have been executed
36only fabric enumerating mports have a valid destination ID
37assigned to them using "hdid=..." rapidio module parameter.
38
39After enumeration or discovery was performed for a given mport device,
40the corresponding subdirectory will also contain subdirectories for each
41child RapidIO device connected to the mport.
42
43The example below shows mport device subdirectory with several child RapidIO
44devices attached to it::
45
46    [rio@rapidio ~]$ ls /sys/class/rapidio_port/rapidio0/ -l
47    total 0
48    drwxr-xr-x 3 root root    0 Feb 11 15:10 00:e:0001
49    drwxr-xr-x 3 root root    0 Feb 11 15:10 00:e:0004
50    drwxr-xr-x 3 root root    0 Feb 11 15:10 00:e:0007
51    drwxr-xr-x 3 root root    0 Feb 11 15:10 00:s:0002
52    drwxr-xr-x 3 root root    0 Feb 11 15:10 00:s:0003
53    drwxr-xr-x 3 root root    0 Feb 11 15:10 00:s:0005
54    lrwxrwxrwx 1 root root    0 Feb 11 15:11 device -> ../../../0000:01:00.0
55    -r--r--r-- 1 root root 4096 Feb 11 15:11 port_destid
56    drwxr-xr-x 2 root root    0 Feb 11 15:11 power
57    lrwxrwxrwx 1 root root    0 Feb 11 15:04 subsystem -> ../../../../../../class/rapidio_port
58    -r--r--r-- 1 root root 4096 Feb 11 15:11 sys_size
59    -rw-r--r-- 1 root root 4096 Feb 11 15:04 uevent
60