OSS OSS-PCIE-4UV-5slot, User Manual

Page: 37 / 98

One Stop Systems
4U Value 5slot G3 Expansion Unit 37
specified by a 16-bit domain number, an 8-bit bus number, a 5-bit device number and a 3-bit function number; the last three numbers are
commonly referred to as the
device's BDF or B/D/F (for bus/device/function).
See table below, the Bus#/Device#/Function# will vary depending on the computer and Linux operating systems. The Slot# and Port# are hard-
coded. It cannot be altered and this will not change regardless of what type (Distribution) of Linux operating system the computer is running
on.
Bus#/Device#/Function# Upstream / Downstream Port Slot# Port#
17:00.0 Upstream Port Target Slot Port# 4
18:00.0 Downstream Port Slot 1 Port #0
18:08.0 Downstream Port Slot 2 Port #8
18.0c.0 Downstream Port Slot 5 Port #12
18.10.0 Downstream Port Slot 3 Port #16
18:14.0 Downstream Port Slot 4 Port #20
5.2.5 Linux Commands to check on expansion device

To check on One Stop Systems device, type lspci | grep 8796 .

To check or to identify whether the bus is the Upstream port and Downstream port, on the terminal window type lspci –s XX.XX.X
-vvv | grep ‘Capabilities’ . Replace x with the bus number for example 17:00.0

To check Upstream port speed and bandwidth, type lspci -s XX.XX.X -vvv | grep ‘LnkCap’

To check the speed and linkwidth, type lspci -s 01:00.0 -vvv | grep “LnkSta

To check for the slot# and port# of the Downstream port, type lspci –s XX:XX.X -vvv | grep ‘Slot\|port’ .
To check the port number, slot number, bandwidth, speed and whether if it is Upstream or Downstream port, type the command on the
terminal lspci -s XX:XX.X –vvv | grep ‘Slot\|Port ’. In this example, we are checking the bus 17:00.00, see screenshot below.
The following photos are screenshots of Linux OS “ lspci -s XX:XX.0 –vvv | grep ‘Slot\|Port ’” output of each downstream port showing the
assigned slot number and port number.
SLOT 1: PORT #0