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Right now, the description of the rapidio sysfs interfaces is in Documentation/rapidio/sysfs.txt. Since these are a part of the ABI, they should be in Documentation/ABI along with the rest. Signed-off-by: Aishwarya Pant <aishpant@gmail.com> Acked-by: Alexandre Bounine <alexandre.bounine@idt.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
56 lines
2.4 KiB
Plaintext
56 lines
2.4 KiB
Plaintext
What: /sys/class/rapidio_port
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Description:
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On-chip RapidIO controllers and PCIe-to-RapidIO bridges
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(referenced as "Master Port" or "mport") are presented in sysfs
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as the special class of devices: "rapidio_port".
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The /sys/class/rapidio_port subdirectory contains individual
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subdirectories named as "rapidioN" where N = mport ID registered
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with RapidIO subsystem.
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NOTE: An mport ID is not a RapidIO destination ID assigned to a
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given local mport device.
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What: /sys/class/rapidio_port/rapidioN/sys_size
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Date: Apr, 2014
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KernelVersion: v3.15
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Contact: Matt Porter <mporter@kernel.crashing.org>,
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Alexandre Bounine <alexandre.bounine@idt.com>
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Description:
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(RO) reports RapidIO common transport system size:
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0 = small (8-bit destination ID, max. 256 devices),
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1 = large (16-bit destination ID, max. 65536 devices).
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What: /sys/class/rapidio_port/rapidioN/port_destid
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Date: Apr, 2014
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KernelVersion: v3.15
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Contact: Matt Porter <mporter@kernel.crashing.org>,
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Alexandre Bounine <alexandre.bounine@idt.com>
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Description:
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(RO) reports RapidIO destination ID assigned to the given
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RapidIO mport device. If value 0xFFFFFFFF is returned this means
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that no valid destination ID have been assigned to the mport
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(yet). Normally, before enumeration/discovery have been executed
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only fabric enumerating mports have a valid destination ID
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assigned to them using "hdid=..." rapidio module parameter.
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After enumeration or discovery was performed for a given mport device,
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the corresponding subdirectory will also contain subdirectories for each
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child RapidIO device connected to the mport.
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The example below shows mport device subdirectory with several child RapidIO
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devices attached to it.
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[rio@rapidio ~]$ ls /sys/class/rapidio_port/rapidio0/ -l
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total 0
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drwxr-xr-x 3 root root 0 Feb 11 15:10 00:e:0001
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drwxr-xr-x 3 root root 0 Feb 11 15:10 00:e:0004
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drwxr-xr-x 3 root root 0 Feb 11 15:10 00:e:0007
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drwxr-xr-x 3 root root 0 Feb 11 15:10 00:s:0002
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drwxr-xr-x 3 root root 0 Feb 11 15:10 00:s:0003
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drwxr-xr-x 3 root root 0 Feb 11 15:10 00:s:0005
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lrwxrwxrwx 1 root root 0 Feb 11 15:11 device -> ../../../0000:01:00.0
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-r--r--r-- 1 root root 4096 Feb 11 15:11 port_destid
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drwxr-xr-x 2 root root 0 Feb 11 15:11 power
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lrwxrwxrwx 1 root root 0 Feb 11 15:04 subsystem -> ../../../../../../class/rapidio_port
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-r--r--r-- 1 root root 4096 Feb 11 15:11 sys_size
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-rw-r--r-- 1 root root 4096 Feb 11 15:04 uevent
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